Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1 | /* |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2 | * linux/fs/ext4/super.c |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3 | * |
| 4 | * Copyright (C) 1992, 1993, 1994, 1995 |
| 5 | * Remy Card (card@masi.ibp.fr) |
| 6 | * Laboratoire MASI - Institut Blaise Pascal |
| 7 | * Universite Pierre et Marie Curie (Paris VI) |
| 8 | * |
| 9 | * from |
| 10 | * |
| 11 | * linux/fs/minix/inode.c |
| 12 | * |
| 13 | * Copyright (C) 1991, 1992 Linus Torvalds |
| 14 | * |
| 15 | * Big-endian to little-endian byte-swapping/bitmaps by |
| 16 | * David S. Miller (davem@caip.rutgers.edu), 1995 |
| 17 | */ |
| 18 | |
| 19 | #include <linux/module.h> |
| 20 | #include <linux/string.h> |
| 21 | #include <linux/fs.h> |
| 22 | #include <linux/time.h> |
Theodore Ts'o | c5ca7c7 | 2009-04-27 22:48:48 -0400 | [diff] [blame] | 23 | #include <linux/vmalloc.h> |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 24 | #include <linux/slab.h> |
| 25 | #include <linux/init.h> |
| 26 | #include <linux/blkdev.h> |
| 27 | #include <linux/parser.h> |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 28 | #include <linux/buffer_head.h> |
Christoph Hellwig | a569425 | 2007-07-17 04:04:28 -0700 | [diff] [blame] | 29 | #include <linux/exportfs.h> |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 30 | #include <linux/vfs.h> |
| 31 | #include <linux/random.h> |
| 32 | #include <linux/mount.h> |
| 33 | #include <linux/namei.h> |
| 34 | #include <linux/quotaops.h> |
| 35 | #include <linux/seq_file.h> |
Theodore Ts'o | 9f6200b | 2008-09-23 09:18:24 -0400 | [diff] [blame] | 36 | #include <linux/proc_fs.h> |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 37 | #include <linux/ctype.h> |
Vignesh Babu | 1330593 | 2007-07-18 09:11:02 -0400 | [diff] [blame] | 38 | #include <linux/log2.h> |
Andreas Dilger | 717d50e | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 39 | #include <linux/crc16.h> |
Dan Magenheimer | 7abc52c | 2011-05-26 10:02:03 -0600 | [diff] [blame] | 40 | #include <linux/cleancache.h> |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 41 | #include <asm/uaccess.h> |
| 42 | |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 43 | #include <linux/kthread.h> |
| 44 | #include <linux/freezer.h> |
| 45 | |
Christoph Hellwig | 3dcf545 | 2008-04-29 18:13:32 -0400 | [diff] [blame] | 46 | #include "ext4.h" |
Theodore Ts'o | 4a092d7 | 2012-11-28 13:03:30 -0500 | [diff] [blame] | 47 | #include "ext4_extents.h" /* Needed for trace points definition */ |
Christoph Hellwig | 3dcf545 | 2008-04-29 18:13:32 -0400 | [diff] [blame] | 48 | #include "ext4_jbd2.h" |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 49 | #include "xattr.h" |
| 50 | #include "acl.h" |
Theodore Ts'o | 3661d28 | 2009-09-14 22:59:50 -0400 | [diff] [blame] | 51 | #include "mballoc.h" |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 52 | |
Theodore Ts'o | 9bffad1 | 2009-06-17 11:48:11 -0400 | [diff] [blame] | 53 | #define CREATE_TRACE_POINTS |
| 54 | #include <trace/events/ext4.h> |
| 55 | |
Theodore Ts'o | 1f109d5 | 2010-10-27 21:30:14 -0400 | [diff] [blame] | 56 | static struct proc_dir_entry *ext4_proc_root; |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 57 | static struct kset *ext4_kset; |
Lukas Czerner | 0b75a84 | 2011-02-23 12:22:49 -0500 | [diff] [blame] | 58 | static struct ext4_lazy_init *ext4_li_info; |
| 59 | static struct mutex ext4_li_mtx; |
| 60 | static struct ext4_features *ext4_feat; |
T Makphaibulchoke | 9c191f7 | 2014-03-18 19:24:49 -0400 | [diff] [blame] | 61 | static int ext4_mballoc_ready; |
Theodore Ts'o | 9f6200b | 2008-09-23 09:18:24 -0400 | [diff] [blame] | 62 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 63 | static int ext4_load_journal(struct super_block *, struct ext4_super_block *, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 64 | unsigned long journal_devnum); |
Theodore Ts'o | 2adf6da | 2012-03-03 23:20:50 -0500 | [diff] [blame] | 65 | static int ext4_show_options(struct seq_file *seq, struct dentry *root); |
Theodore Ts'o | e2d6705 | 2009-05-01 00:33:44 -0400 | [diff] [blame] | 66 | static int ext4_commit_super(struct super_block *sb, int sync); |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 67 | static void ext4_mark_recovery_complete(struct super_block *sb, |
| 68 | struct ext4_super_block *es); |
| 69 | static void ext4_clear_journal_err(struct super_block *sb, |
| 70 | struct ext4_super_block *es); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 71 | static int ext4_sync_fs(struct super_block *sb, int wait); |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 72 | static int ext4_remount(struct super_block *sb, int *flags, char *data); |
| 73 | static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); |
Takashi Sato | c4be0c1 | 2009-01-09 16:40:58 -0800 | [diff] [blame] | 74 | static int ext4_unfreeze(struct super_block *sb); |
Takashi Sato | c4be0c1 | 2009-01-09 16:40:58 -0800 | [diff] [blame] | 75 | static int ext4_freeze(struct super_block *sb); |
Al Viro | 152a083 | 2010-07-25 00:46:55 +0400 | [diff] [blame] | 76 | static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, |
| 77 | const char *dev_name, void *data); |
Theodore Ts'o | 2035e77 | 2011-04-18 17:29:14 -0400 | [diff] [blame] | 78 | static inline int ext2_feature_set_ok(struct super_block *sb); |
| 79 | static inline int ext3_feature_set_ok(struct super_block *sb); |
Amir Goldstein | d39195c | 2011-02-28 00:53:45 -0500 | [diff] [blame] | 80 | static int ext4_feature_set_ok(struct super_block *sb, int readonly); |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 81 | static void ext4_destroy_lazyinit_thread(void); |
| 82 | static void ext4_unregister_li_request(struct super_block *sb); |
Eric Sandeen | 8f1f745 | 2011-02-03 14:33:15 -0500 | [diff] [blame] | 83 | static void ext4_clear_request_list(void); |
Lukas Czerner | 27dd438 | 2013-04-09 22:11:22 -0400 | [diff] [blame] | 84 | static int ext4_reserve_clusters(struct ext4_sb_info *, ext4_fsblk_t); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 85 | |
Theodore Ts'o | 2035e77 | 2011-04-18 17:29:14 -0400 | [diff] [blame] | 86 | #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) |
| 87 | static struct file_system_type ext2_fs_type = { |
| 88 | .owner = THIS_MODULE, |
| 89 | .name = "ext2", |
| 90 | .mount = ext4_mount, |
| 91 | .kill_sb = kill_block_super, |
| 92 | .fs_flags = FS_REQUIRES_DEV, |
| 93 | }; |
Eric W. Biederman | 7f78e03 | 2013-03-02 19:39:14 -0800 | [diff] [blame] | 94 | MODULE_ALIAS_FS("ext2"); |
Eric W. Biederman | fa7614dd | 2013-03-12 18:27:41 -0700 | [diff] [blame] | 95 | MODULE_ALIAS("ext2"); |
Theodore Ts'o | 2035e77 | 2011-04-18 17:29:14 -0400 | [diff] [blame] | 96 | #define IS_EXT2_SB(sb) ((sb)->s_bdev->bd_holder == &ext2_fs_type) |
| 97 | #else |
| 98 | #define IS_EXT2_SB(sb) (0) |
| 99 | #endif |
| 100 | |
| 101 | |
Jan Kara | ba69f9a | 2010-03-24 20:18:37 -0400 | [diff] [blame] | 102 | #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) |
| 103 | static struct file_system_type ext3_fs_type = { |
| 104 | .owner = THIS_MODULE, |
| 105 | .name = "ext3", |
Al Viro | 152a083 | 2010-07-25 00:46:55 +0400 | [diff] [blame] | 106 | .mount = ext4_mount, |
Jan Kara | ba69f9a | 2010-03-24 20:18:37 -0400 | [diff] [blame] | 107 | .kill_sb = kill_block_super, |
| 108 | .fs_flags = FS_REQUIRES_DEV, |
| 109 | }; |
Eric W. Biederman | 7f78e03 | 2013-03-02 19:39:14 -0800 | [diff] [blame] | 110 | MODULE_ALIAS_FS("ext3"); |
Eric W. Biederman | fa7614dd | 2013-03-12 18:27:41 -0700 | [diff] [blame] | 111 | MODULE_ALIAS("ext3"); |
Jan Kara | ba69f9a | 2010-03-24 20:18:37 -0400 | [diff] [blame] | 112 | #define IS_EXT3_SB(sb) ((sb)->s_bdev->bd_holder == &ext3_fs_type) |
| 113 | #else |
| 114 | #define IS_EXT3_SB(sb) (0) |
| 115 | #endif |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 116 | |
Darrick J. Wong | d25425f | 2012-04-29 18:25:10 -0400 | [diff] [blame] | 117 | static int ext4_verify_csum_type(struct super_block *sb, |
| 118 | struct ext4_super_block *es) |
| 119 | { |
| 120 | if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, |
| 121 | EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) |
| 122 | return 1; |
| 123 | |
| 124 | return es->s_checksum_type == EXT4_CRC32C_CHKSUM; |
| 125 | } |
| 126 | |
Darrick J. Wong | a9c47317 | 2012-04-29 18:29:10 -0400 | [diff] [blame] | 127 | static __le32 ext4_superblock_csum(struct super_block *sb, |
| 128 | struct ext4_super_block *es) |
| 129 | { |
| 130 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
| 131 | int offset = offsetof(struct ext4_super_block, s_checksum); |
| 132 | __u32 csum; |
| 133 | |
| 134 | csum = ext4_chksum(sbi, ~0, (char *)es, offset); |
| 135 | |
| 136 | return cpu_to_le32(csum); |
| 137 | } |
| 138 | |
Stephen Hemminger | c197855 | 2014-05-12 10:50:23 -0400 | [diff] [blame] | 139 | static int ext4_superblock_csum_verify(struct super_block *sb, |
| 140 | struct ext4_super_block *es) |
Darrick J. Wong | a9c47317 | 2012-04-29 18:29:10 -0400 | [diff] [blame] | 141 | { |
Dmitry Monakhov | 9aa5d32 | 2014-10-13 03:36:16 -0400 | [diff] [blame] | 142 | if (!ext4_has_metadata_csum(sb)) |
Darrick J. Wong | a9c47317 | 2012-04-29 18:29:10 -0400 | [diff] [blame] | 143 | return 1; |
| 144 | |
| 145 | return es->s_checksum == ext4_superblock_csum(sb, es); |
| 146 | } |
| 147 | |
Theodore Ts'o | 06db49e | 2012-10-10 01:06:58 -0400 | [diff] [blame] | 148 | void ext4_superblock_csum_set(struct super_block *sb) |
Darrick J. Wong | a9c47317 | 2012-04-29 18:29:10 -0400 | [diff] [blame] | 149 | { |
Theodore Ts'o | 06db49e | 2012-10-10 01:06:58 -0400 | [diff] [blame] | 150 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
| 151 | |
Dmitry Monakhov | 9aa5d32 | 2014-10-13 03:36:16 -0400 | [diff] [blame] | 152 | if (!ext4_has_metadata_csum(sb)) |
Darrick J. Wong | a9c47317 | 2012-04-29 18:29:10 -0400 | [diff] [blame] | 153 | return; |
| 154 | |
| 155 | es->s_checksum = ext4_superblock_csum(sb, es); |
| 156 | } |
| 157 | |
Theodore Ts'o | 9933fc0 | 2011-08-01 08:45:02 -0400 | [diff] [blame] | 158 | void *ext4_kvmalloc(size_t size, gfp_t flags) |
| 159 | { |
| 160 | void *ret; |
| 161 | |
Joe Perches | 8be04b9 | 2013-06-19 12:15:53 -0700 | [diff] [blame] | 162 | ret = kmalloc(size, flags | __GFP_NOWARN); |
Theodore Ts'o | 9933fc0 | 2011-08-01 08:45:02 -0400 | [diff] [blame] | 163 | if (!ret) |
| 164 | ret = __vmalloc(size, flags, PAGE_KERNEL); |
| 165 | return ret; |
| 166 | } |
| 167 | |
| 168 | void *ext4_kvzalloc(size_t size, gfp_t flags) |
| 169 | { |
| 170 | void *ret; |
| 171 | |
Joe Perches | 8be04b9 | 2013-06-19 12:15:53 -0700 | [diff] [blame] | 172 | ret = kzalloc(size, flags | __GFP_NOWARN); |
Theodore Ts'o | 9933fc0 | 2011-08-01 08:45:02 -0400 | [diff] [blame] | 173 | if (!ret) |
| 174 | ret = __vmalloc(size, flags | __GFP_ZERO, PAGE_KERNEL); |
| 175 | return ret; |
| 176 | } |
| 177 | |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 178 | ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, |
| 179 | struct ext4_group_desc *bg) |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 180 | { |
Aneesh Kumar K.V | 3a14589 | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 181 | return le32_to_cpu(bg->bg_block_bitmap_lo) | |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 182 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 183 | (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 184 | } |
| 185 | |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 186 | ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, |
| 187 | struct ext4_group_desc *bg) |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 188 | { |
Aneesh Kumar K.V | 5272f83 | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 189 | return le32_to_cpu(bg->bg_inode_bitmap_lo) | |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 190 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 191 | (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 192 | } |
| 193 | |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 194 | ext4_fsblk_t ext4_inode_table(struct super_block *sb, |
| 195 | struct ext4_group_desc *bg) |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 196 | { |
Aneesh Kumar K.V | 5272f83 | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 197 | return le32_to_cpu(bg->bg_inode_table_lo) | |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 198 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 199 | (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 200 | } |
| 201 | |
Theodore Ts'o | 021b65b | 2011-09-09 19:08:51 -0400 | [diff] [blame] | 202 | __u32 ext4_free_group_clusters(struct super_block *sb, |
| 203 | struct ext4_group_desc *bg) |
Aneesh Kumar K.V | 560671a | 2009-01-05 22:20:24 -0500 | [diff] [blame] | 204 | { |
| 205 | return le16_to_cpu(bg->bg_free_blocks_count_lo) | |
| 206 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 207 | (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); |
Aneesh Kumar K.V | 560671a | 2009-01-05 22:20:24 -0500 | [diff] [blame] | 208 | } |
| 209 | |
| 210 | __u32 ext4_free_inodes_count(struct super_block *sb, |
| 211 | struct ext4_group_desc *bg) |
| 212 | { |
| 213 | return le16_to_cpu(bg->bg_free_inodes_count_lo) | |
| 214 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 215 | (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); |
Aneesh Kumar K.V | 560671a | 2009-01-05 22:20:24 -0500 | [diff] [blame] | 216 | } |
| 217 | |
| 218 | __u32 ext4_used_dirs_count(struct super_block *sb, |
| 219 | struct ext4_group_desc *bg) |
| 220 | { |
| 221 | return le16_to_cpu(bg->bg_used_dirs_count_lo) | |
| 222 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 223 | (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); |
Aneesh Kumar K.V | 560671a | 2009-01-05 22:20:24 -0500 | [diff] [blame] | 224 | } |
| 225 | |
| 226 | __u32 ext4_itable_unused_count(struct super_block *sb, |
| 227 | struct ext4_group_desc *bg) |
| 228 | { |
| 229 | return le16_to_cpu(bg->bg_itable_unused_lo) | |
| 230 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 231 | (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); |
Aneesh Kumar K.V | 560671a | 2009-01-05 22:20:24 -0500 | [diff] [blame] | 232 | } |
| 233 | |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 234 | void ext4_block_bitmap_set(struct super_block *sb, |
| 235 | struct ext4_group_desc *bg, ext4_fsblk_t blk) |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 236 | { |
Aneesh Kumar K.V | 3a14589 | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 237 | bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 238 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
| 239 | bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 240 | } |
| 241 | |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 242 | void ext4_inode_bitmap_set(struct super_block *sb, |
| 243 | struct ext4_group_desc *bg, ext4_fsblk_t blk) |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 244 | { |
Aneesh Kumar K.V | 5272f83 | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 245 | bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 246 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
| 247 | bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 248 | } |
| 249 | |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 250 | void ext4_inode_table_set(struct super_block *sb, |
| 251 | struct ext4_group_desc *bg, ext4_fsblk_t blk) |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 252 | { |
Aneesh Kumar K.V | 5272f83 | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 253 | bg->bg_inode_table_lo = cpu_to_le32((u32)blk); |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 254 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
| 255 | bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 256 | } |
| 257 | |
Theodore Ts'o | 021b65b | 2011-09-09 19:08:51 -0400 | [diff] [blame] | 258 | void ext4_free_group_clusters_set(struct super_block *sb, |
| 259 | struct ext4_group_desc *bg, __u32 count) |
Aneesh Kumar K.V | 560671a | 2009-01-05 22:20:24 -0500 | [diff] [blame] | 260 | { |
| 261 | bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); |
| 262 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
| 263 | bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); |
| 264 | } |
| 265 | |
| 266 | void ext4_free_inodes_set(struct super_block *sb, |
| 267 | struct ext4_group_desc *bg, __u32 count) |
| 268 | { |
| 269 | bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); |
| 270 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
| 271 | bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); |
| 272 | } |
| 273 | |
| 274 | void ext4_used_dirs_set(struct super_block *sb, |
| 275 | struct ext4_group_desc *bg, __u32 count) |
| 276 | { |
| 277 | bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); |
| 278 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
| 279 | bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); |
| 280 | } |
| 281 | |
| 282 | void ext4_itable_unused_set(struct super_block *sb, |
| 283 | struct ext4_group_desc *bg, __u32 count) |
| 284 | { |
| 285 | bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); |
| 286 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
| 287 | bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); |
| 288 | } |
| 289 | |
Curt Wohlgemuth | d3d1faf | 2009-09-29 11:01:03 -0400 | [diff] [blame] | 290 | |
Theodore Ts'o | 1c13d5c | 2010-07-27 11:56:03 -0400 | [diff] [blame] | 291 | static void __save_error_info(struct super_block *sb, const char *func, |
| 292 | unsigned int line) |
| 293 | { |
| 294 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
| 295 | |
| 296 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; |
Theodore Ts'o | 1b46617 | 2015-05-14 18:37:30 -0400 | [diff] [blame] | 297 | if (bdev_read_only(sb->s_bdev)) |
| 298 | return; |
Theodore Ts'o | 1c13d5c | 2010-07-27 11:56:03 -0400 | [diff] [blame] | 299 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); |
| 300 | es->s_last_error_time = cpu_to_le32(get_seconds()); |
| 301 | strncpy(es->s_last_error_func, func, sizeof(es->s_last_error_func)); |
| 302 | es->s_last_error_line = cpu_to_le32(line); |
| 303 | if (!es->s_first_error_time) { |
| 304 | es->s_first_error_time = es->s_last_error_time; |
| 305 | strncpy(es->s_first_error_func, func, |
| 306 | sizeof(es->s_first_error_func)); |
| 307 | es->s_first_error_line = cpu_to_le32(line); |
| 308 | es->s_first_error_ino = es->s_last_error_ino; |
| 309 | es->s_first_error_block = es->s_last_error_block; |
| 310 | } |
Theodore Ts'o | 66e61a9 | 2010-07-27 11:56:04 -0400 | [diff] [blame] | 311 | /* |
| 312 | * Start the daily error reporting function if it hasn't been |
| 313 | * started already |
| 314 | */ |
| 315 | if (!es->s_error_count) |
| 316 | mod_timer(&EXT4_SB(sb)->s_err_report, jiffies + 24*60*60*HZ); |
Wei Yongjun | ba39ebb | 2012-09-27 09:37:53 -0400 | [diff] [blame] | 317 | le32_add_cpu(&es->s_error_count, 1); |
Theodore Ts'o | 1c13d5c | 2010-07-27 11:56:03 -0400 | [diff] [blame] | 318 | } |
| 319 | |
| 320 | static void save_error_info(struct super_block *sb, const char *func, |
| 321 | unsigned int line) |
| 322 | { |
| 323 | __save_error_info(sb, func, line); |
| 324 | ext4_commit_super(sb, 1); |
| 325 | } |
| 326 | |
Bobi Jam | 18aadd4 | 2012-02-20 17:53:02 -0500 | [diff] [blame] | 327 | static void ext4_journal_commit_callback(journal_t *journal, transaction_t *txn) |
| 328 | { |
| 329 | struct super_block *sb = journal->j_private; |
| 330 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
| 331 | int error = is_journal_aborted(journal); |
Dmitry Monakhov | 5d3ee20 | 2013-04-03 22:08:52 -0400 | [diff] [blame] | 332 | struct ext4_journal_cb_entry *jce; |
Bobi Jam | 18aadd4 | 2012-02-20 17:53:02 -0500 | [diff] [blame] | 333 | |
Dmitry Monakhov | 5d3ee20 | 2013-04-03 22:08:52 -0400 | [diff] [blame] | 334 | BUG_ON(txn->t_state == T_FINISHED); |
Bobi Jam | 18aadd4 | 2012-02-20 17:53:02 -0500 | [diff] [blame] | 335 | spin_lock(&sbi->s_md_lock); |
Dmitry Monakhov | 5d3ee20 | 2013-04-03 22:08:52 -0400 | [diff] [blame] | 336 | while (!list_empty(&txn->t_private_list)) { |
| 337 | jce = list_entry(txn->t_private_list.next, |
| 338 | struct ext4_journal_cb_entry, jce_list); |
Bobi Jam | 18aadd4 | 2012-02-20 17:53:02 -0500 | [diff] [blame] | 339 | list_del_init(&jce->jce_list); |
| 340 | spin_unlock(&sbi->s_md_lock); |
| 341 | jce->jce_func(sb, jce, error); |
| 342 | spin_lock(&sbi->s_md_lock); |
| 343 | } |
| 344 | spin_unlock(&sbi->s_md_lock); |
| 345 | } |
Theodore Ts'o | 1c13d5c | 2010-07-27 11:56:03 -0400 | [diff] [blame] | 346 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 347 | /* Deal with the reporting of failure conditions on a filesystem such as |
| 348 | * inconsistencies detected or read IO failures. |
| 349 | * |
| 350 | * On ext2, we can store the error state of the filesystem in the |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 351 | * superblock. That is not possible on ext4, because we may have other |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 352 | * write ordering constraints on the superblock which prevent us from |
| 353 | * writing it out straight away; and given that the journal is about to |
| 354 | * be aborted, we can't rely on the current, or future, transactions to |
| 355 | * write out the superblock safely. |
| 356 | * |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 357 | * We'll just use the jbd2_journal_abort() error code to record an error in |
Thadeu Lima de Souza Cascardo | d6b198b | 2010-01-17 19:10:07 -0200 | [diff] [blame] | 358 | * the journal instead. On recovery, the journal will complain about |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 359 | * that error until we've noted it down and cleared it. |
| 360 | */ |
| 361 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 362 | static void ext4_handle_error(struct super_block *sb) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 363 | { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 364 | if (sb->s_flags & MS_RDONLY) |
| 365 | return; |
| 366 | |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 367 | if (!test_opt(sb, ERRORS_CONT)) { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 368 | journal_t *journal = EXT4_SB(sb)->s_journal; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 369 | |
Theodore Ts'o | 4ab2f15 | 2009-06-13 10:09:36 -0400 | [diff] [blame] | 370 | EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 371 | if (journal) |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 372 | jbd2_journal_abort(journal, -EIO); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 373 | } |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 374 | if (test_opt(sb, ERRORS_RO)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 375 | ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); |
Dmitry Monakhov | 4418e141 | 2013-06-12 22:38:04 -0400 | [diff] [blame] | 376 | /* |
| 377 | * Make sure updated value of ->s_mount_flags will be visible |
| 378 | * before ->s_flags update |
| 379 | */ |
| 380 | smp_wmb(); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 381 | sb->s_flags |= MS_RDONLY; |
| 382 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 383 | if (test_opt(sb, ERRORS_PANIC)) |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 384 | panic("EXT4-fs (device %s): panic forced after error\n", |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 385 | sb->s_id); |
| 386 | } |
| 387 | |
Theodore Ts'o | efbed4d | 2013-10-17 21:11:01 -0400 | [diff] [blame] | 388 | #define ext4_error_ratelimit(sb) \ |
| 389 | ___ratelimit(&(EXT4_SB(sb)->s_err_ratelimit_state), \ |
| 390 | "EXT4-fs error") |
| 391 | |
Eric Sandeen | 12062dd | 2010-02-15 14:19:27 -0500 | [diff] [blame] | 392 | void __ext4_error(struct super_block *sb, const char *function, |
Theodore Ts'o | c398eda | 2010-07-27 11:56:40 -0400 | [diff] [blame] | 393 | unsigned int line, const char *fmt, ...) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 394 | { |
Joe Perches | 0ff2ea7 | 2010-12-19 22:43:19 -0500 | [diff] [blame] | 395 | struct va_format vaf; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 396 | va_list args; |
| 397 | |
Theodore Ts'o | efbed4d | 2013-10-17 21:11:01 -0400 | [diff] [blame] | 398 | if (ext4_error_ratelimit(sb)) { |
| 399 | va_start(args, fmt); |
| 400 | vaf.fmt = fmt; |
| 401 | vaf.va = &args; |
| 402 | printk(KERN_CRIT |
| 403 | "EXT4-fs error (device %s): %s:%d: comm %s: %pV\n", |
| 404 | sb->s_id, function, line, current->comm, &vaf); |
| 405 | va_end(args); |
| 406 | } |
Theodore Ts'o | f3fc0210 | 2012-05-30 23:00:16 -0400 | [diff] [blame] | 407 | save_error_info(sb, function, line); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 408 | ext4_handle_error(sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 409 | } |
| 410 | |
Joe Perches | e7c96e8 | 2013-07-01 08:12:37 -0400 | [diff] [blame] | 411 | void __ext4_error_inode(struct inode *inode, const char *function, |
| 412 | unsigned int line, ext4_fsblk_t block, |
| 413 | const char *fmt, ...) |
Frank Mayhar | 273df55 | 2010-03-02 11:46:09 -0500 | [diff] [blame] | 414 | { |
| 415 | va_list args; |
Theodore Ts'o | f7c2117 | 2011-01-10 12:10:55 -0500 | [diff] [blame] | 416 | struct va_format vaf; |
Theodore Ts'o | 1c13d5c | 2010-07-27 11:56:03 -0400 | [diff] [blame] | 417 | struct ext4_super_block *es = EXT4_SB(inode->i_sb)->s_es; |
Frank Mayhar | 273df55 | 2010-03-02 11:46:09 -0500 | [diff] [blame] | 418 | |
Theodore Ts'o | 1c13d5c | 2010-07-27 11:56:03 -0400 | [diff] [blame] | 419 | es->s_last_error_ino = cpu_to_le32(inode->i_ino); |
| 420 | es->s_last_error_block = cpu_to_le64(block); |
Theodore Ts'o | efbed4d | 2013-10-17 21:11:01 -0400 | [diff] [blame] | 421 | if (ext4_error_ratelimit(inode->i_sb)) { |
| 422 | va_start(args, fmt); |
| 423 | vaf.fmt = fmt; |
| 424 | vaf.va = &args; |
| 425 | if (block) |
| 426 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " |
| 427 | "inode #%lu: block %llu: comm %s: %pV\n", |
| 428 | inode->i_sb->s_id, function, line, inode->i_ino, |
| 429 | block, current->comm, &vaf); |
| 430 | else |
| 431 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " |
| 432 | "inode #%lu: comm %s: %pV\n", |
| 433 | inode->i_sb->s_id, function, line, inode->i_ino, |
| 434 | current->comm, &vaf); |
| 435 | va_end(args); |
| 436 | } |
Theodore Ts'o | 1c13d5c | 2010-07-27 11:56:03 -0400 | [diff] [blame] | 437 | save_error_info(inode->i_sb, function, line); |
Frank Mayhar | 273df55 | 2010-03-02 11:46:09 -0500 | [diff] [blame] | 438 | ext4_handle_error(inode->i_sb); |
| 439 | } |
| 440 | |
Joe Perches | e7c96e8 | 2013-07-01 08:12:37 -0400 | [diff] [blame] | 441 | void __ext4_error_file(struct file *file, const char *function, |
| 442 | unsigned int line, ext4_fsblk_t block, |
| 443 | const char *fmt, ...) |
Frank Mayhar | 273df55 | 2010-03-02 11:46:09 -0500 | [diff] [blame] | 444 | { |
| 445 | va_list args; |
Theodore Ts'o | f7c2117 | 2011-01-10 12:10:55 -0500 | [diff] [blame] | 446 | struct va_format vaf; |
Theodore Ts'o | 1c13d5c | 2010-07-27 11:56:03 -0400 | [diff] [blame] | 447 | struct ext4_super_block *es; |
Al Viro | 496ad9a | 2013-01-23 17:07:38 -0500 | [diff] [blame] | 448 | struct inode *inode = file_inode(file); |
Frank Mayhar | 273df55 | 2010-03-02 11:46:09 -0500 | [diff] [blame] | 449 | char pathname[80], *path; |
| 450 | |
Theodore Ts'o | 1c13d5c | 2010-07-27 11:56:03 -0400 | [diff] [blame] | 451 | es = EXT4_SB(inode->i_sb)->s_es; |
| 452 | es->s_last_error_ino = cpu_to_le32(inode->i_ino); |
Theodore Ts'o | efbed4d | 2013-10-17 21:11:01 -0400 | [diff] [blame] | 453 | if (ext4_error_ratelimit(inode->i_sb)) { |
| 454 | path = d_path(&(file->f_path), pathname, sizeof(pathname)); |
| 455 | if (IS_ERR(path)) |
| 456 | path = "(unknown)"; |
| 457 | va_start(args, fmt); |
| 458 | vaf.fmt = fmt; |
| 459 | vaf.va = &args; |
| 460 | if (block) |
| 461 | printk(KERN_CRIT |
| 462 | "EXT4-fs error (device %s): %s:%d: inode #%lu: " |
| 463 | "block %llu: comm %s: path %s: %pV\n", |
| 464 | inode->i_sb->s_id, function, line, inode->i_ino, |
| 465 | block, current->comm, path, &vaf); |
| 466 | else |
| 467 | printk(KERN_CRIT |
| 468 | "EXT4-fs error (device %s): %s:%d: inode #%lu: " |
| 469 | "comm %s: path %s: %pV\n", |
| 470 | inode->i_sb->s_id, function, line, inode->i_ino, |
| 471 | current->comm, path, &vaf); |
| 472 | va_end(args); |
| 473 | } |
Theodore Ts'o | 1c13d5c | 2010-07-27 11:56:03 -0400 | [diff] [blame] | 474 | save_error_info(inode->i_sb, function, line); |
Frank Mayhar | 273df55 | 2010-03-02 11:46:09 -0500 | [diff] [blame] | 475 | ext4_handle_error(inode->i_sb); |
| 476 | } |
| 477 | |
Theodore Ts'o | 722887d | 2013-02-08 13:00:31 -0500 | [diff] [blame] | 478 | const char *ext4_decode_error(struct super_block *sb, int errno, |
| 479 | char nbuf[16]) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 480 | { |
| 481 | char *errstr = NULL; |
| 482 | |
| 483 | switch (errno) { |
| 484 | case -EIO: |
| 485 | errstr = "IO failure"; |
| 486 | break; |
| 487 | case -ENOMEM: |
| 488 | errstr = "Out of memory"; |
| 489 | break; |
| 490 | case -EROFS: |
Theodore Ts'o | 78f1ddb | 2009-07-27 23:09:47 -0400 | [diff] [blame] | 491 | if (!sb || (EXT4_SB(sb)->s_journal && |
| 492 | EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 493 | errstr = "Journal has aborted"; |
| 494 | else |
| 495 | errstr = "Readonly filesystem"; |
| 496 | break; |
| 497 | default: |
| 498 | /* If the caller passed in an extra buffer for unknown |
| 499 | * errors, textualise them now. Else we just return |
| 500 | * NULL. */ |
| 501 | if (nbuf) { |
| 502 | /* Check for truncated error codes... */ |
| 503 | if (snprintf(nbuf, 16, "error %d", -errno) >= 0) |
| 504 | errstr = nbuf; |
| 505 | } |
| 506 | break; |
| 507 | } |
| 508 | |
| 509 | return errstr; |
| 510 | } |
| 511 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 512 | /* __ext4_std_error decodes expected errors from journaling functions |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 513 | * automatically and invokes the appropriate error response. */ |
| 514 | |
Theodore Ts'o | c398eda | 2010-07-27 11:56:40 -0400 | [diff] [blame] | 515 | void __ext4_std_error(struct super_block *sb, const char *function, |
| 516 | unsigned int line, int errno) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 517 | { |
| 518 | char nbuf[16]; |
| 519 | const char *errstr; |
| 520 | |
| 521 | /* Special case: if the error is EROFS, and we're not already |
| 522 | * inside a transaction, then there's really no point in logging |
| 523 | * an error. */ |
| 524 | if (errno == -EROFS && journal_current_handle() == NULL && |
| 525 | (sb->s_flags & MS_RDONLY)) |
| 526 | return; |
| 527 | |
Theodore Ts'o | efbed4d | 2013-10-17 21:11:01 -0400 | [diff] [blame] | 528 | if (ext4_error_ratelimit(sb)) { |
| 529 | errstr = ext4_decode_error(sb, errno, nbuf); |
| 530 | printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n", |
| 531 | sb->s_id, function, line, errstr); |
| 532 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 533 | |
Theodore Ts'o | efbed4d | 2013-10-17 21:11:01 -0400 | [diff] [blame] | 534 | save_error_info(sb, function, line); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 535 | ext4_handle_error(sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 536 | } |
| 537 | |
| 538 | /* |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 539 | * ext4_abort is a much stronger failure handler than ext4_error. The |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 540 | * abort function may be used to deal with unrecoverable failures such |
| 541 | * as journal IO errors or ENOMEM at a critical moment in log management. |
| 542 | * |
| 543 | * We unconditionally force the filesystem into an ABORT|READONLY state, |
| 544 | * unless the error response on the fs has been set to panic in which |
| 545 | * case we take the easy way out and panic immediately. |
| 546 | */ |
| 547 | |
Theodore Ts'o | c67d859 | 2010-06-29 11:07:07 -0400 | [diff] [blame] | 548 | void __ext4_abort(struct super_block *sb, const char *function, |
Theodore Ts'o | c398eda | 2010-07-27 11:56:40 -0400 | [diff] [blame] | 549 | unsigned int line, const char *fmt, ...) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 550 | { |
| 551 | va_list args; |
| 552 | |
Theodore Ts'o | 1c13d5c | 2010-07-27 11:56:03 -0400 | [diff] [blame] | 553 | save_error_info(sb, function, line); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 554 | va_start(args, fmt); |
Theodore Ts'o | c398eda | 2010-07-27 11:56:40 -0400 | [diff] [blame] | 555 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: ", sb->s_id, |
| 556 | function, line); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 557 | vprintk(fmt, args); |
| 558 | printk("\n"); |
| 559 | va_end(args); |
| 560 | |
Theodore Ts'o | 1c13d5c | 2010-07-27 11:56:03 -0400 | [diff] [blame] | 561 | if ((sb->s_flags & MS_RDONLY) == 0) { |
| 562 | ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); |
Theodore Ts'o | 1c13d5c | 2010-07-27 11:56:03 -0400 | [diff] [blame] | 563 | EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; |
Dmitry Monakhov | 4418e141 | 2013-06-12 22:38:04 -0400 | [diff] [blame] | 564 | /* |
| 565 | * Make sure updated value of ->s_mount_flags will be visible |
| 566 | * before ->s_flags update |
| 567 | */ |
| 568 | smp_wmb(); |
| 569 | sb->s_flags |= MS_RDONLY; |
Theodore Ts'o | 1c13d5c | 2010-07-27 11:56:03 -0400 | [diff] [blame] | 570 | if (EXT4_SB(sb)->s_journal) |
| 571 | jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); |
| 572 | save_error_info(sb, function, line); |
| 573 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 574 | if (test_opt(sb, ERRORS_PANIC)) |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 575 | panic("EXT4-fs panic from previous error\n"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 576 | } |
| 577 | |
Joe Perches | e7c96e8 | 2013-07-01 08:12:37 -0400 | [diff] [blame] | 578 | void __ext4_msg(struct super_block *sb, |
| 579 | const char *prefix, const char *fmt, ...) |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 580 | { |
Joe Perches | 0ff2ea7 | 2010-12-19 22:43:19 -0500 | [diff] [blame] | 581 | struct va_format vaf; |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 582 | va_list args; |
| 583 | |
Theodore Ts'o | efbed4d | 2013-10-17 21:11:01 -0400 | [diff] [blame] | 584 | if (!___ratelimit(&(EXT4_SB(sb)->s_msg_ratelimit_state), "EXT4-fs")) |
| 585 | return; |
| 586 | |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 587 | va_start(args, fmt); |
Joe Perches | 0ff2ea7 | 2010-12-19 22:43:19 -0500 | [diff] [blame] | 588 | vaf.fmt = fmt; |
| 589 | vaf.va = &args; |
| 590 | printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf); |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 591 | va_end(args); |
| 592 | } |
| 593 | |
Eric Sandeen | 12062dd | 2010-02-15 14:19:27 -0500 | [diff] [blame] | 594 | void __ext4_warning(struct super_block *sb, const char *function, |
Theodore Ts'o | c398eda | 2010-07-27 11:56:40 -0400 | [diff] [blame] | 595 | unsigned int line, const char *fmt, ...) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 596 | { |
Joe Perches | 0ff2ea7 | 2010-12-19 22:43:19 -0500 | [diff] [blame] | 597 | struct va_format vaf; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 598 | va_list args; |
| 599 | |
Theodore Ts'o | efbed4d | 2013-10-17 21:11:01 -0400 | [diff] [blame] | 600 | if (!___ratelimit(&(EXT4_SB(sb)->s_warning_ratelimit_state), |
| 601 | "EXT4-fs warning")) |
| 602 | return; |
| 603 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 604 | va_start(args, fmt); |
Joe Perches | 0ff2ea7 | 2010-12-19 22:43:19 -0500 | [diff] [blame] | 605 | vaf.fmt = fmt; |
| 606 | vaf.va = &args; |
| 607 | printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n", |
| 608 | sb->s_id, function, line, &vaf); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 609 | va_end(args); |
| 610 | } |
| 611 | |
Theodore Ts'o | e29136f | 2010-06-29 12:54:28 -0400 | [diff] [blame] | 612 | void __ext4_grp_locked_error(const char *function, unsigned int line, |
| 613 | struct super_block *sb, ext4_group_t grp, |
| 614 | unsigned long ino, ext4_fsblk_t block, |
| 615 | const char *fmt, ...) |
Aneesh Kumar K.V | 5d1b1b3 | 2009-01-05 22:19:52 -0500 | [diff] [blame] | 616 | __releases(bitlock) |
| 617 | __acquires(bitlock) |
| 618 | { |
Joe Perches | 0ff2ea7 | 2010-12-19 22:43:19 -0500 | [diff] [blame] | 619 | struct va_format vaf; |
Aneesh Kumar K.V | 5d1b1b3 | 2009-01-05 22:19:52 -0500 | [diff] [blame] | 620 | va_list args; |
| 621 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
| 622 | |
Theodore Ts'o | 1c13d5c | 2010-07-27 11:56:03 -0400 | [diff] [blame] | 623 | es->s_last_error_ino = cpu_to_le32(ino); |
| 624 | es->s_last_error_block = cpu_to_le64(block); |
| 625 | __save_error_info(sb, function, line); |
Joe Perches | 0ff2ea7 | 2010-12-19 22:43:19 -0500 | [diff] [blame] | 626 | |
Theodore Ts'o | efbed4d | 2013-10-17 21:11:01 -0400 | [diff] [blame] | 627 | if (ext4_error_ratelimit(sb)) { |
| 628 | va_start(args, fmt); |
| 629 | vaf.fmt = fmt; |
| 630 | vaf.va = &args; |
| 631 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u, ", |
| 632 | sb->s_id, function, line, grp); |
| 633 | if (ino) |
| 634 | printk(KERN_CONT "inode %lu: ", ino); |
| 635 | if (block) |
| 636 | printk(KERN_CONT "block %llu:", |
| 637 | (unsigned long long) block); |
| 638 | printk(KERN_CONT "%pV\n", &vaf); |
| 639 | va_end(args); |
| 640 | } |
Aneesh Kumar K.V | 5d1b1b3 | 2009-01-05 22:19:52 -0500 | [diff] [blame] | 641 | |
| 642 | if (test_opt(sb, ERRORS_CONT)) { |
Theodore Ts'o | e2d6705 | 2009-05-01 00:33:44 -0400 | [diff] [blame] | 643 | ext4_commit_super(sb, 0); |
Aneesh Kumar K.V | 5d1b1b3 | 2009-01-05 22:19:52 -0500 | [diff] [blame] | 644 | return; |
| 645 | } |
Theodore Ts'o | 1c13d5c | 2010-07-27 11:56:03 -0400 | [diff] [blame] | 646 | |
Aneesh Kumar K.V | 5d1b1b3 | 2009-01-05 22:19:52 -0500 | [diff] [blame] | 647 | ext4_unlock_group(sb, grp); |
| 648 | ext4_handle_error(sb); |
| 649 | /* |
| 650 | * We only get here in the ERRORS_RO case; relocking the group |
| 651 | * may be dangerous, but nothing bad will happen since the |
| 652 | * filesystem will have already been marked read/only and the |
| 653 | * journal has been aborted. We return 1 as a hint to callers |
| 654 | * who might what to use the return value from |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 655 | * ext4_grp_locked_error() to distinguish between the |
Aneesh Kumar K.V | 5d1b1b3 | 2009-01-05 22:19:52 -0500 | [diff] [blame] | 656 | * ERRORS_CONT and ERRORS_RO case, and perhaps return more |
| 657 | * aggressively from the ext4 function in question, with a |
| 658 | * more appropriate error code. |
| 659 | */ |
| 660 | ext4_lock_group(sb, grp); |
| 661 | return; |
| 662 | } |
| 663 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 664 | void ext4_update_dynamic_rev(struct super_block *sb) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 665 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 666 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 667 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 668 | if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 669 | return; |
| 670 | |
Eric Sandeen | 12062dd | 2010-02-15 14:19:27 -0500 | [diff] [blame] | 671 | ext4_warning(sb, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 672 | "updating to rev %d because of new feature flag, " |
| 673 | "running e2fsck is recommended", |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 674 | EXT4_DYNAMIC_REV); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 675 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 676 | es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); |
| 677 | es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); |
| 678 | es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 679 | /* leave es->s_feature_*compat flags alone */ |
| 680 | /* es->s_uuid will be set by e2fsck if empty */ |
| 681 | |
| 682 | /* |
| 683 | * The rest of the superblock fields should be zero, and if not it |
| 684 | * means they are likely already in use, so leave them alone. We |
| 685 | * can leave it up to e2fsck to clean up any inconsistencies there. |
| 686 | */ |
| 687 | } |
| 688 | |
| 689 | /* |
| 690 | * Open the external journal device |
| 691 | */ |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 692 | static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 693 | { |
| 694 | struct block_device *bdev; |
| 695 | char b[BDEVNAME_SIZE]; |
| 696 | |
Tejun Heo | d4d7762 | 2010-11-13 11:55:18 +0100 | [diff] [blame] | 697 | bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 698 | if (IS_ERR(bdev)) |
| 699 | goto fail; |
| 700 | return bdev; |
| 701 | |
| 702 | fail: |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 703 | ext4_msg(sb, KERN_ERR, "failed to open journal device %s: %ld", |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 704 | __bdevname(dev, b), PTR_ERR(bdev)); |
| 705 | return NULL; |
| 706 | } |
| 707 | |
| 708 | /* |
| 709 | * Release the journal device |
| 710 | */ |
Al Viro | 4385bab | 2013-05-05 22:11:03 -0400 | [diff] [blame] | 711 | static void ext4_blkdev_put(struct block_device *bdev) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 712 | { |
Al Viro | 4385bab | 2013-05-05 22:11:03 -0400 | [diff] [blame] | 713 | blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 714 | } |
| 715 | |
Al Viro | 4385bab | 2013-05-05 22:11:03 -0400 | [diff] [blame] | 716 | static void ext4_blkdev_remove(struct ext4_sb_info *sbi) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 717 | { |
| 718 | struct block_device *bdev; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 719 | bdev = sbi->journal_bdev; |
| 720 | if (bdev) { |
Al Viro | 4385bab | 2013-05-05 22:11:03 -0400 | [diff] [blame] | 721 | ext4_blkdev_put(bdev); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 722 | sbi->journal_bdev = NULL; |
| 723 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 724 | } |
| 725 | |
| 726 | static inline struct inode *orphan_list_entry(struct list_head *l) |
| 727 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 728 | return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 729 | } |
| 730 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 731 | static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 732 | { |
| 733 | struct list_head *l; |
| 734 | |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 735 | ext4_msg(sb, KERN_ERR, "sb orphan head is %d", |
| 736 | le32_to_cpu(sbi->s_es->s_last_orphan)); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 737 | |
| 738 | printk(KERN_ERR "sb_info orphan list:\n"); |
| 739 | list_for_each(l, &sbi->s_orphan) { |
| 740 | struct inode *inode = orphan_list_entry(l); |
| 741 | printk(KERN_ERR " " |
| 742 | "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", |
| 743 | inode->i_sb->s_id, inode->i_ino, inode, |
| 744 | inode->i_mode, inode->i_nlink, |
| 745 | NEXT_ORPHAN(inode)); |
| 746 | } |
| 747 | } |
| 748 | |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 749 | static void ext4_put_super(struct super_block *sb) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 750 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 751 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
| 752 | struct ext4_super_block *es = sbi->s_es; |
Hidehiro Kawai | ef2cabf | 2008-10-27 22:53:05 -0400 | [diff] [blame] | 753 | int i, err; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 754 | |
Lukas Czerner | 857ac88 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 755 | ext4_unregister_li_request(sb); |
Christoph Hellwig | e0ccfd9 | 2010-05-19 07:16:42 -0400 | [diff] [blame] | 756 | dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); |
| 757 | |
Jan Kara | 2e8fa54 | 2013-06-04 14:21:02 -0400 | [diff] [blame] | 758 | flush_workqueue(sbi->rsv_conversion_wq); |
Jan Kara | 2e8fa54 | 2013-06-04 14:21:02 -0400 | [diff] [blame] | 759 | destroy_workqueue(sbi->rsv_conversion_wq); |
Mingming Cao | 4c0425f | 2009-09-28 15:48:41 -0400 | [diff] [blame] | 760 | |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 761 | if (sbi->s_journal) { |
| 762 | err = jbd2_journal_destroy(sbi->s_journal); |
| 763 | sbi->s_journal = NULL; |
| 764 | if (err < 0) |
Theodore Ts'o | c67d859 | 2010-06-29 11:07:07 -0400 | [diff] [blame] | 765 | ext4_abort(sb, "Couldn't clean up the journal"); |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 766 | } |
Josef Bacik | d4edac3 | 2009-12-08 21:48:58 -0500 | [diff] [blame] | 767 | |
Zheng Liu | d3922a7 | 2013-07-01 08:12:37 -0400 | [diff] [blame] | 768 | ext4_es_unregister_shrinker(sbi); |
Al Viro | 9105bb1 | 2013-12-08 20:52:31 -0500 | [diff] [blame] | 769 | del_timer_sync(&sbi->s_err_report); |
Josef Bacik | d4edac3 | 2009-12-08 21:48:58 -0500 | [diff] [blame] | 770 | ext4_release_system_zone(sb); |
| 771 | ext4_mb_release(sb); |
| 772 | ext4_ext_release(sb); |
| 773 | ext4_xattr_put_super(sb); |
| 774 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 775 | if (!(sb->s_flags & MS_RDONLY)) { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 776 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 777 | es->s_state = cpu_to_le16(sbi->s_mount_state); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 778 | } |
Artem Bityutskiy | 58c5873 | 2012-07-22 20:33:31 -0400 | [diff] [blame] | 779 | if (!(sb->s_flags & MS_RDONLY)) |
Artem Bityutskiy | a8e25a8 | 2012-03-21 22:29:15 -0400 | [diff] [blame] | 780 | ext4_commit_super(sb, 1); |
| 781 | |
Theodore Ts'o | 240799c | 2008-10-09 23:53:47 -0400 | [diff] [blame] | 782 | if (sbi->s_proc) { |
Theodore Ts'o | 66acdcf | 2012-03-04 20:21:38 -0500 | [diff] [blame] | 783 | remove_proc_entry("options", sbi->s_proc); |
Theodore Ts'o | 9f6200b | 2008-09-23 09:18:24 -0400 | [diff] [blame] | 784 | remove_proc_entry(sb->s_id, ext4_proc_root); |
Theodore Ts'o | 240799c | 2008-10-09 23:53:47 -0400 | [diff] [blame] | 785 | } |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 786 | kobject_del(&sbi->s_kobj); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 787 | |
| 788 | for (i = 0; i < sbi->s_gdb_count; i++) |
| 789 | brelse(sbi->s_group_desc[i]); |
Al Viro | b93b41d | 2014-11-20 12:19:11 -0500 | [diff] [blame] | 790 | kvfree(sbi->s_group_desc); |
| 791 | kvfree(sbi->s_flex_groups); |
Theodore Ts'o | 5704265 | 2011-09-09 18:56:51 -0400 | [diff] [blame] | 792 | percpu_counter_destroy(&sbi->s_freeclusters_counter); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 793 | percpu_counter_destroy(&sbi->s_freeinodes_counter); |
| 794 | percpu_counter_destroy(&sbi->s_dirs_counter); |
Theodore Ts'o | 5704265 | 2011-09-09 18:56:51 -0400 | [diff] [blame] | 795 | percpu_counter_destroy(&sbi->s_dirtyclusters_counter); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 796 | brelse(sbi->s_sbh); |
| 797 | #ifdef CONFIG_QUOTA |
Jan Kara | a2d4a64 | 2014-09-11 11:15:15 -0400 | [diff] [blame] | 798 | for (i = 0; i < EXT4_MAXQUOTAS; i++) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 799 | kfree(sbi->s_qf_names[i]); |
| 800 | #endif |
| 801 | |
| 802 | /* Debugging code just in case the in-memory inode orphan list |
| 803 | * isn't empty. The on-disk one can be non-empty if we've |
| 804 | * detected an error and taken the fs readonly, but the |
| 805 | * in-memory list had better be clean by this point. */ |
| 806 | if (!list_empty(&sbi->s_orphan)) |
| 807 | dump_orphan_list(sb, sbi); |
| 808 | J_ASSERT(list_empty(&sbi->s_orphan)); |
| 809 | |
Peter Zijlstra | f98393a | 2007-05-06 14:49:54 -0700 | [diff] [blame] | 810 | invalidate_bdev(sb->s_bdev); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 811 | if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { |
| 812 | /* |
| 813 | * Invalidate the journal device's buffers. We don't want them |
| 814 | * floating about in memory - the physical journal device may |
| 815 | * hotswapped, and it breaks the `ro-after' testing code. |
| 816 | */ |
| 817 | sync_blockdev(sbi->journal_bdev); |
Peter Zijlstra | f98393a | 2007-05-06 14:49:54 -0700 | [diff] [blame] | 818 | invalidate_bdev(sbi->journal_bdev); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 819 | ext4_blkdev_remove(sbi); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 820 | } |
T Makphaibulchoke | 9c191f7 | 2014-03-18 19:24:49 -0400 | [diff] [blame] | 821 | if (sbi->s_mb_cache) { |
| 822 | ext4_xattr_destroy_cache(sbi->s_mb_cache); |
| 823 | sbi->s_mb_cache = NULL; |
| 824 | } |
Johann Lombardi | c5e06d1 | 2011-05-24 18:31:25 -0400 | [diff] [blame] | 825 | if (sbi->s_mmp_tsk) |
| 826 | kthread_stop(sbi->s_mmp_tsk); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 827 | sb->s_fs_info = NULL; |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 828 | /* |
| 829 | * Now that we are completely done shutting down the |
| 830 | * superblock, we need to actually destroy the kobject. |
| 831 | */ |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 832 | kobject_put(&sbi->s_kobj); |
| 833 | wait_for_completion(&sbi->s_kobj_unregister); |
Darrick J. Wong | 0441984 | 2012-04-29 18:27:10 -0400 | [diff] [blame] | 834 | if (sbi->s_chksum_driver) |
| 835 | crypto_free_shash(sbi->s_chksum_driver); |
Pekka Enberg | 705895b | 2009-02-15 18:07:52 -0500 | [diff] [blame] | 836 | kfree(sbi->s_blockgroup_lock); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 837 | kfree(sbi); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 838 | } |
| 839 | |
Christoph Lameter | e18b890 | 2006-12-06 20:33:20 -0800 | [diff] [blame] | 840 | static struct kmem_cache *ext4_inode_cachep; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 841 | |
| 842 | /* |
| 843 | * Called inside transaction, so use GFP_NOFS |
| 844 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 845 | static struct inode *ext4_alloc_inode(struct super_block *sb) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 846 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 847 | struct ext4_inode_info *ei; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 848 | |
Christoph Lameter | e6b4f8d | 2006-12-06 20:33:14 -0800 | [diff] [blame] | 849 | ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 850 | if (!ei) |
| 851 | return NULL; |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 852 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 853 | ei->vfs_inode.i_version = 1; |
Theodore Ts'o | 202ee5d | 2014-04-21 14:37:55 -0400 | [diff] [blame] | 854 | spin_lock_init(&ei->i_raw_lock); |
Alex Tomas | c9de560 | 2008-01-29 00:19:52 -0500 | [diff] [blame] | 855 | INIT_LIST_HEAD(&ei->i_prealloc_list); |
| 856 | spin_lock_init(&ei->i_prealloc_lock); |
Zheng Liu | 9a26b66 | 2012-11-08 21:57:30 -0500 | [diff] [blame] | 857 | ext4_es_init_tree(&ei->i_es_tree); |
| 858 | rwlock_init(&ei->i_es_lock); |
Zheng Liu | edaa53c | 2014-11-25 11:45:37 -0500 | [diff] [blame] | 859 | INIT_LIST_HEAD(&ei->i_es_list); |
Zheng Liu | eb68d0e | 2014-09-01 22:26:49 -0400 | [diff] [blame] | 860 | ei->i_es_all_nr = 0; |
Zheng Liu | edaa53c | 2014-11-25 11:45:37 -0500 | [diff] [blame] | 861 | ei->i_es_shk_nr = 0; |
Jan Kara | dd47592 | 2014-11-25 11:51:23 -0500 | [diff] [blame] | 862 | ei->i_es_shrink_lblk = 0; |
Mingming Cao | d2a1763 | 2008-07-14 17:52:37 -0400 | [diff] [blame] | 863 | ei->i_reserved_data_blocks = 0; |
| 864 | ei->i_reserved_meta_blocks = 0; |
| 865 | ei->i_allocated_meta_blocks = 0; |
Theodore Ts'o | 9d0be50 | 2010-01-01 02:41:30 -0500 | [diff] [blame] | 866 | ei->i_da_metadata_calc_len = 0; |
Theodore Ts'o | 7e731bc | 2012-08-05 23:28:16 -0400 | [diff] [blame] | 867 | ei->i_da_metadata_calc_last_lblock = 0; |
Mingming Cao | d2a1763 | 2008-07-14 17:52:37 -0400 | [diff] [blame] | 868 | spin_lock_init(&(ei->i_block_reservation_lock)); |
Dmitry Monakhov | a9e7f44 | 2009-12-14 15:21:14 +0300 | [diff] [blame] | 869 | #ifdef CONFIG_QUOTA |
| 870 | ei->i_reserved_quota = 0; |
Jan Kara | 96c7e0d | 2014-09-29 14:58:25 +0200 | [diff] [blame] | 871 | memset(&ei->i_dquot, 0, sizeof(ei->i_dquot)); |
Dmitry Monakhov | a9e7f44 | 2009-12-14 15:21:14 +0300 | [diff] [blame] | 872 | #endif |
Theodore Ts'o | 8aefcd5 | 2011-01-10 12:29:43 -0500 | [diff] [blame] | 873 | ei->jinode = NULL; |
Jan Kara | 2e8fa54 | 2013-06-04 14:21:02 -0400 | [diff] [blame] | 874 | INIT_LIST_HEAD(&ei->i_rsv_conversion_list); |
Jiaying Zhang | 744692d | 2010-03-04 16:14:02 -0500 | [diff] [blame] | 875 | spin_lock_init(&ei->i_completed_io_lock); |
Jan Kara | b436b9b | 2009-12-08 23:51:10 -0500 | [diff] [blame] | 876 | ei->i_sync_tid = 0; |
| 877 | ei->i_datasync_tid = 0; |
Theodore Ts'o | f7ad6d2 | 2010-11-08 13:43:33 -0500 | [diff] [blame] | 878 | atomic_set(&ei->i_ioend_count, 0); |
Dmitry Monakhov | e27f41e | 2012-09-28 23:24:52 -0400 | [diff] [blame] | 879 | atomic_set(&ei->i_unwritten, 0); |
Jan Kara | 2e8fa54 | 2013-06-04 14:21:02 -0400 | [diff] [blame] | 880 | INIT_WORK(&ei->i_rsv_conversion_work, ext4_end_io_rsv_work); |
Michael Halcrow | b30ab0e | 2015-04-12 00:43:56 -0400 | [diff] [blame] | 881 | #ifdef CONFIG_EXT4_FS_ENCRYPTION |
| 882 | ei->i_encryption_key.mode = EXT4_ENCRYPTION_MODE_INVALID; |
| 883 | #endif |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 884 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 885 | return &ei->vfs_inode; |
| 886 | } |
| 887 | |
Theodore Ts'o | 7ff9c07 | 2010-11-08 13:51:33 -0500 | [diff] [blame] | 888 | static int ext4_drop_inode(struct inode *inode) |
| 889 | { |
| 890 | int drop = generic_drop_inode(inode); |
| 891 | |
| 892 | trace_ext4_drop_inode(inode, drop); |
| 893 | return drop; |
| 894 | } |
| 895 | |
Nick Piggin | fa0d7e3d | 2011-01-07 17:49:49 +1100 | [diff] [blame] | 896 | static void ext4_i_callback(struct rcu_head *head) |
| 897 | { |
| 898 | struct inode *inode = container_of(head, struct inode, i_rcu); |
Nick Piggin | fa0d7e3d | 2011-01-07 17:49:49 +1100 | [diff] [blame] | 899 | kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); |
| 900 | } |
| 901 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 902 | static void ext4_destroy_inode(struct inode *inode) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 903 | { |
Vasily Averin | 9f7dd93 | 2007-07-15 23:40:45 -0700 | [diff] [blame] | 904 | if (!list_empty(&(EXT4_I(inode)->i_orphan))) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 905 | ext4_msg(inode->i_sb, KERN_ERR, |
| 906 | "Inode %lu (%p): orphan list check failed!", |
| 907 | inode->i_ino, EXT4_I(inode)); |
Vasily Averin | 9f7dd93 | 2007-07-15 23:40:45 -0700 | [diff] [blame] | 908 | print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, |
| 909 | EXT4_I(inode), sizeof(struct ext4_inode_info), |
| 910 | true); |
| 911 | dump_stack(); |
| 912 | } |
Nick Piggin | fa0d7e3d | 2011-01-07 17:49:49 +1100 | [diff] [blame] | 913 | call_rcu(&inode->i_rcu, ext4_i_callback); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 914 | } |
| 915 | |
Alexey Dobriyan | 51cc506 | 2008-07-25 19:45:34 -0700 | [diff] [blame] | 916 | static void init_once(void *foo) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 917 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 918 | struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 919 | |
Christoph Lameter | a35afb8 | 2007-05-16 22:10:57 -0700 | [diff] [blame] | 920 | INIT_LIST_HEAD(&ei->i_orphan); |
Christoph Lameter | a35afb8 | 2007-05-16 22:10:57 -0700 | [diff] [blame] | 921 | init_rwsem(&ei->xattr_sem); |
Aneesh Kumar K.V | 0e855ac | 2008-01-28 23:58:26 -0500 | [diff] [blame] | 922 | init_rwsem(&ei->i_data_sem); |
Christoph Lameter | a35afb8 | 2007-05-16 22:10:57 -0700 | [diff] [blame] | 923 | inode_init_once(&ei->vfs_inode); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 924 | } |
| 925 | |
Fabian Frederick | e67bc2b | 2014-02-17 20:34:53 -0500 | [diff] [blame] | 926 | static int __init init_inodecache(void) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 927 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 928 | ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", |
| 929 | sizeof(struct ext4_inode_info), |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 930 | 0, (SLAB_RECLAIM_ACCOUNT| |
| 931 | SLAB_MEM_SPREAD), |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 932 | init_once); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 933 | if (ext4_inode_cachep == NULL) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 934 | return -ENOMEM; |
| 935 | return 0; |
| 936 | } |
| 937 | |
| 938 | static void destroy_inodecache(void) |
| 939 | { |
Kirill A. Shutemov | 8c0a853 | 2012-09-26 11:33:07 +1000 | [diff] [blame] | 940 | /* |
| 941 | * Make sure all delayed rcu free inodes are flushed before we |
| 942 | * destroy cache. |
| 943 | */ |
| 944 | rcu_barrier(); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 945 | kmem_cache_destroy(ext4_inode_cachep); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 946 | } |
| 947 | |
Al Viro | 0930fcc | 2010-06-07 13:16:22 -0400 | [diff] [blame] | 948 | void ext4_clear_inode(struct inode *inode) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 949 | { |
Al Viro | 0930fcc | 2010-06-07 13:16:22 -0400 | [diff] [blame] | 950 | invalidate_inode_buffers(inode); |
Jan Kara | dbd5768 | 2012-05-03 14:48:02 +0200 | [diff] [blame] | 951 | clear_inode(inode); |
Christoph Hellwig | 9f75475 | 2010-03-03 09:05:05 -0500 | [diff] [blame] | 952 | dquot_drop(inode); |
Theodore Ts'o | c2ea3fd | 2008-10-10 09:40:52 -0400 | [diff] [blame] | 953 | ext4_discard_preallocations(inode); |
Zheng Liu | 51865fd | 2012-11-08 21:57:32 -0500 | [diff] [blame] | 954 | ext4_es_remove_extent(inode, 0, EXT_MAX_BLOCKS); |
Theodore Ts'o | 8aefcd5 | 2011-01-10 12:29:43 -0500 | [diff] [blame] | 955 | if (EXT4_I(inode)->jinode) { |
| 956 | jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), |
| 957 | EXT4_I(inode)->jinode); |
| 958 | jbd2_free_inode(EXT4_I(inode)->jinode); |
| 959 | EXT4_I(inode)->jinode = NULL; |
| 960 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 961 | } |
| 962 | |
Christoph Hellwig | 1b961ac | 2007-10-21 16:42:08 -0700 | [diff] [blame] | 963 | static struct inode *ext4_nfs_get_inode(struct super_block *sb, |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 964 | u64 ino, u32 generation) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 965 | { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 966 | struct inode *inode; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 967 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 968 | if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 969 | return ERR_PTR(-ESTALE); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 970 | if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 971 | return ERR_PTR(-ESTALE); |
| 972 | |
| 973 | /* iget isn't really right if the inode is currently unallocated!! |
| 974 | * |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 975 | * ext4_read_inode will return a bad_inode if the inode had been |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 976 | * deleted, so we should be safe. |
| 977 | * |
| 978 | * Currently we don't know the generation for parent directory, so |
| 979 | * a generation of 0 means "accept any" |
| 980 | */ |
Theodore Ts'o | f4bb298 | 2014-10-05 22:56:00 -0400 | [diff] [blame] | 981 | inode = ext4_iget_normal(sb, ino); |
David Howells | 1d1fe1e | 2008-02-07 00:15:37 -0800 | [diff] [blame] | 982 | if (IS_ERR(inode)) |
| 983 | return ERR_CAST(inode); |
| 984 | if (generation && inode->i_generation != generation) { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 985 | iput(inode); |
| 986 | return ERR_PTR(-ESTALE); |
| 987 | } |
Christoph Hellwig | 1b961ac | 2007-10-21 16:42:08 -0700 | [diff] [blame] | 988 | |
| 989 | return inode; |
| 990 | } |
| 991 | |
| 992 | static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 993 | int fh_len, int fh_type) |
Christoph Hellwig | 1b961ac | 2007-10-21 16:42:08 -0700 | [diff] [blame] | 994 | { |
| 995 | return generic_fh_to_dentry(sb, fid, fh_len, fh_type, |
| 996 | ext4_nfs_get_inode); |
| 997 | } |
| 998 | |
| 999 | static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 1000 | int fh_len, int fh_type) |
Christoph Hellwig | 1b961ac | 2007-10-21 16:42:08 -0700 | [diff] [blame] | 1001 | { |
| 1002 | return generic_fh_to_parent(sb, fid, fh_len, fh_type, |
| 1003 | ext4_nfs_get_inode); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1004 | } |
| 1005 | |
Toshiyuki Okajima | c39a7f8 | 2009-01-05 22:38:48 -0500 | [diff] [blame] | 1006 | /* |
| 1007 | * Try to release metadata pages (indirect blocks, directories) which are |
| 1008 | * mapped via the block device. Since these pages could have journal heads |
| 1009 | * which would prevent try_to_free_buffers() from freeing them, we must use |
| 1010 | * jbd2 layer's try_to_free_buffers() function to release them. |
| 1011 | */ |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 1012 | static int bdev_try_to_free_page(struct super_block *sb, struct page *page, |
| 1013 | gfp_t wait) |
Toshiyuki Okajima | c39a7f8 | 2009-01-05 22:38:48 -0500 | [diff] [blame] | 1014 | { |
| 1015 | journal_t *journal = EXT4_SB(sb)->s_journal; |
| 1016 | |
| 1017 | WARN_ON(PageChecked(page)); |
| 1018 | if (!page_has_buffers(page)) |
| 1019 | return 0; |
| 1020 | if (journal) |
| 1021 | return jbd2_journal_try_to_free_buffers(journal, page, |
| 1022 | wait & ~__GFP_WAIT); |
| 1023 | return try_to_free_buffers(page); |
| 1024 | } |
| 1025 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1026 | #ifdef CONFIG_QUOTA |
Theodore Ts'o | af5bc92 | 2008-09-08 22:25:24 -0400 | [diff] [blame] | 1027 | #define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group") |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 1028 | #define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1029 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1030 | static int ext4_write_dquot(struct dquot *dquot); |
| 1031 | static int ext4_acquire_dquot(struct dquot *dquot); |
| 1032 | static int ext4_release_dquot(struct dquot *dquot); |
| 1033 | static int ext4_mark_dquot_dirty(struct dquot *dquot); |
| 1034 | static int ext4_write_info(struct super_block *sb, int type); |
Jan Kara | 6f28e08 | 2008-04-28 02:14:34 -0700 | [diff] [blame] | 1035 | static int ext4_quota_on(struct super_block *sb, int type, int format_id, |
Jan Kara | f00c9e4 | 2010-09-15 17:38:58 +0200 | [diff] [blame] | 1036 | struct path *path); |
Dmitry Monakhov | ca0e05e | 2010-08-01 17:48:36 -0400 | [diff] [blame] | 1037 | static int ext4_quota_off(struct super_block *sb, int type); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1038 | static int ext4_quota_on_mount(struct super_block *sb, int type); |
| 1039 | static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1040 | size_t len, loff_t off); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1041 | static ssize_t ext4_quota_write(struct super_block *sb, int type, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1042 | const char *data, size_t len, loff_t off); |
Aditya Kali | 7c319d3 | 2012-07-22 20:21:31 -0400 | [diff] [blame] | 1043 | static int ext4_quota_enable(struct super_block *sb, int type, int format_id, |
| 1044 | unsigned int flags); |
| 1045 | static int ext4_enable_quotas(struct super_block *sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1046 | |
Jan Kara | 96c7e0d | 2014-09-29 14:58:25 +0200 | [diff] [blame] | 1047 | static struct dquot **ext4_get_dquots(struct inode *inode) |
| 1048 | { |
| 1049 | return EXT4_I(inode)->i_dquot; |
| 1050 | } |
| 1051 | |
Alexey Dobriyan | 61e225d | 2009-09-21 17:01:08 -0700 | [diff] [blame] | 1052 | static const struct dquot_operations ext4_quota_operations = { |
Mingming Cao | 60e58e0 | 2009-01-22 18:13:05 +0100 | [diff] [blame] | 1053 | .get_reserved_space = ext4_get_reserved_space, |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1054 | .write_dquot = ext4_write_dquot, |
| 1055 | .acquire_dquot = ext4_acquire_dquot, |
| 1056 | .release_dquot = ext4_release_dquot, |
| 1057 | .mark_dirty = ext4_mark_dquot_dirty, |
Jan Kara | a5b5ee3 | 2008-11-25 15:31:35 +0100 | [diff] [blame] | 1058 | .write_info = ext4_write_info, |
| 1059 | .alloc_dquot = dquot_alloc, |
| 1060 | .destroy_dquot = dquot_destroy, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1061 | }; |
| 1062 | |
Alexey Dobriyan | 0d54b21 | 2009-09-21 17:01:09 -0700 | [diff] [blame] | 1063 | static const struct quotactl_ops ext4_qctl_operations = { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1064 | .quota_on = ext4_quota_on, |
Dmitry Monakhov | ca0e05e | 2010-08-01 17:48:36 -0400 | [diff] [blame] | 1065 | .quota_off = ext4_quota_off, |
Christoph Hellwig | 287a809 | 2010-05-19 07:16:45 -0400 | [diff] [blame] | 1066 | .quota_sync = dquot_quota_sync, |
Jan Kara | 0a240339 | 2014-11-19 00:42:09 +0100 | [diff] [blame] | 1067 | .get_state = dquot_get_state, |
Christoph Hellwig | 287a809 | 2010-05-19 07:16:45 -0400 | [diff] [blame] | 1068 | .set_info = dquot_set_dqinfo, |
| 1069 | .get_dqblk = dquot_get_dqblk, |
| 1070 | .set_dqblk = dquot_set_dqblk |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1071 | }; |
| 1072 | #endif |
| 1073 | |
Josef 'Jeff' Sipek | ee9b6d6 | 2007-02-12 00:55:41 -0800 | [diff] [blame] | 1074 | static const struct super_operations ext4_sops = { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1075 | .alloc_inode = ext4_alloc_inode, |
| 1076 | .destroy_inode = ext4_destroy_inode, |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1077 | .write_inode = ext4_write_inode, |
| 1078 | .dirty_inode = ext4_dirty_inode, |
Theodore Ts'o | 7ff9c07 | 2010-11-08 13:51:33 -0500 | [diff] [blame] | 1079 | .drop_inode = ext4_drop_inode, |
Al Viro | 0930fcc | 2010-06-07 13:16:22 -0400 | [diff] [blame] | 1080 | .evict_inode = ext4_evict_inode, |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1081 | .put_super = ext4_put_super, |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1082 | .sync_fs = ext4_sync_fs, |
Takashi Sato | c4be0c1 | 2009-01-09 16:40:58 -0800 | [diff] [blame] | 1083 | .freeze_fs = ext4_freeze, |
| 1084 | .unfreeze_fs = ext4_unfreeze, |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1085 | .statfs = ext4_statfs, |
| 1086 | .remount_fs = ext4_remount, |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1087 | .show_options = ext4_show_options, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1088 | #ifdef CONFIG_QUOTA |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1089 | .quota_read = ext4_quota_read, |
| 1090 | .quota_write = ext4_quota_write, |
Jan Kara | 96c7e0d | 2014-09-29 14:58:25 +0200 | [diff] [blame] | 1091 | .get_dquots = ext4_get_dquots, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1092 | #endif |
Toshiyuki Okajima | c39a7f8 | 2009-01-05 22:38:48 -0500 | [diff] [blame] | 1093 | .bdev_try_to_free_page = bdev_try_to_free_page, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1094 | }; |
| 1095 | |
Christoph Hellwig | 3965516 | 2007-10-21 16:42:17 -0700 | [diff] [blame] | 1096 | static const struct export_operations ext4_export_ops = { |
Christoph Hellwig | 1b961ac | 2007-10-21 16:42:08 -0700 | [diff] [blame] | 1097 | .fh_to_dentry = ext4_fh_to_dentry, |
| 1098 | .fh_to_parent = ext4_fh_to_parent, |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1099 | .get_parent = ext4_get_parent, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1100 | }; |
| 1101 | |
| 1102 | enum { |
| 1103 | Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, |
| 1104 | Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, |
Theodore Ts'o | 72578c3 | 2012-03-03 18:04:40 -0500 | [diff] [blame] | 1105 | Opt_nouid32, Opt_debug, Opt_removed, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1106 | Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, |
Theodore Ts'o | 72578c3 | 2012-03-03 18:04:40 -0500 | [diff] [blame] | 1107 | Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, |
Eric Sandeen | ad4eec6 | 2013-08-28 19:05:07 -0400 | [diff] [blame] | 1108 | Opt_commit, Opt_min_batch_time, Opt_max_batch_time, Opt_journal_dev, |
| 1109 | Opt_journal_path, Opt_journal_checksum, Opt_journal_async_commit, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1110 | Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, |
Theodore Ts'o | 6ddb244 | 2015-04-16 01:56:00 -0400 | [diff] [blame] | 1111 | Opt_data_err_abort, Opt_data_err_ignore, Opt_test_dummy_encryption, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1112 | Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, |
Jan Kara | 5a20bdf | 2009-11-30 23:58:32 +0100 | [diff] [blame] | 1113 | Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, |
Theodore Ts'o | ee4a3fc | 2012-03-02 12:14:24 -0500 | [diff] [blame] | 1114 | Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err, |
Ross Zwisler | 923ae0f | 2015-02-16 15:59:38 -0800 | [diff] [blame] | 1115 | Opt_usrquota, Opt_grpquota, Opt_i_version, Opt_dax, |
Theodore Ts'o | 1449032 | 2010-12-14 15:27:50 -0500 | [diff] [blame] | 1116 | Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_mblk_io_submit, |
Theodore Ts'o | a26f499 | 2015-02-02 00:37:02 -0500 | [diff] [blame] | 1117 | Opt_lazytime, Opt_nolazytime, |
Theodore Ts'o | 1449032 | 2010-12-14 15:27:50 -0500 | [diff] [blame] | 1118 | Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, |
Eric Sandeen | 5328e63 | 2009-11-19 14:25:42 -0500 | [diff] [blame] | 1119 | Opt_inode_readahead_blks, Opt_journal_ioprio, |
Jiaying Zhang | 744692d | 2010-03-04 16:14:02 -0500 | [diff] [blame] | 1120 | Opt_dioread_nolock, Opt_dioread_lock, |
Theodore Ts'o | fc6cb1c | 2011-12-12 22:06:18 -0500 | [diff] [blame] | 1121 | Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable, |
Darrick J. Wong | c6d3d56 | 2014-11-25 16:20:50 -0500 | [diff] [blame] | 1122 | Opt_max_dir_size_kb, Opt_nojournal_checksum, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1123 | }; |
| 1124 | |
Steven Whitehouse | a447c09 | 2008-10-13 10:46:57 +0100 | [diff] [blame] | 1125 | static const match_table_t tokens = { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1126 | {Opt_bsd_df, "bsddf"}, |
| 1127 | {Opt_minix_df, "minixdf"}, |
| 1128 | {Opt_grpid, "grpid"}, |
| 1129 | {Opt_grpid, "bsdgroups"}, |
| 1130 | {Opt_nogrpid, "nogrpid"}, |
| 1131 | {Opt_nogrpid, "sysvgroups"}, |
| 1132 | {Opt_resgid, "resgid=%u"}, |
| 1133 | {Opt_resuid, "resuid=%u"}, |
| 1134 | {Opt_sb, "sb=%u"}, |
| 1135 | {Opt_err_cont, "errors=continue"}, |
| 1136 | {Opt_err_panic, "errors=panic"}, |
| 1137 | {Opt_err_ro, "errors=remount-ro"}, |
| 1138 | {Opt_nouid32, "nouid32"}, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1139 | {Opt_debug, "debug"}, |
Theodore Ts'o | 72578c3 | 2012-03-03 18:04:40 -0500 | [diff] [blame] | 1140 | {Opt_removed, "oldalloc"}, |
| 1141 | {Opt_removed, "orlov"}, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1142 | {Opt_user_xattr, "user_xattr"}, |
| 1143 | {Opt_nouser_xattr, "nouser_xattr"}, |
| 1144 | {Opt_acl, "acl"}, |
| 1145 | {Opt_noacl, "noacl"}, |
Eric Sandeen | e3bb52a | 2009-11-19 14:28:50 -0500 | [diff] [blame] | 1146 | {Opt_noload, "norecovery"}, |
Theodore Ts'o | 5a916be | 2012-03-04 19:27:31 -0500 | [diff] [blame] | 1147 | {Opt_noload, "noload"}, |
Theodore Ts'o | 72578c3 | 2012-03-03 18:04:40 -0500 | [diff] [blame] | 1148 | {Opt_removed, "nobh"}, |
| 1149 | {Opt_removed, "bh"}, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1150 | {Opt_commit, "commit=%u"}, |
Theodore Ts'o | 3077384 | 2009-01-03 20:27:38 -0500 | [diff] [blame] | 1151 | {Opt_min_batch_time, "min_batch_time=%u"}, |
| 1152 | {Opt_max_batch_time, "max_batch_time=%u"}, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1153 | {Opt_journal_dev, "journal_dev=%u"}, |
Eric Sandeen | ad4eec6 | 2013-08-28 19:05:07 -0400 | [diff] [blame] | 1154 | {Opt_journal_path, "journal_path=%s"}, |
Girish Shilamkar | 818d276 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 1155 | {Opt_journal_checksum, "journal_checksum"}, |
Darrick J. Wong | c6d3d56 | 2014-11-25 16:20:50 -0500 | [diff] [blame] | 1156 | {Opt_nojournal_checksum, "nojournal_checksum"}, |
Girish Shilamkar | 818d276 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 1157 | {Opt_journal_async_commit, "journal_async_commit"}, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1158 | {Opt_abort, "abort"}, |
| 1159 | {Opt_data_journal, "data=journal"}, |
| 1160 | {Opt_data_ordered, "data=ordered"}, |
| 1161 | {Opt_data_writeback, "data=writeback"}, |
Hidehiro Kawai | 5bf5683 | 2008-10-10 22:12:43 -0400 | [diff] [blame] | 1162 | {Opt_data_err_abort, "data_err=abort"}, |
| 1163 | {Opt_data_err_ignore, "data_err=ignore"}, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1164 | {Opt_offusrjquota, "usrjquota="}, |
| 1165 | {Opt_usrjquota, "usrjquota=%s"}, |
| 1166 | {Opt_offgrpjquota, "grpjquota="}, |
| 1167 | {Opt_grpjquota, "grpjquota=%s"}, |
| 1168 | {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, |
| 1169 | {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, |
Jan Kara | 5a20bdf | 2009-11-30 23:58:32 +0100 | [diff] [blame] | 1170 | {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1171 | {Opt_grpquota, "grpquota"}, |
| 1172 | {Opt_noquota, "noquota"}, |
| 1173 | {Opt_quota, "quota"}, |
| 1174 | {Opt_usrquota, "usrquota"}, |
| 1175 | {Opt_barrier, "barrier=%u"}, |
Theodore Ts'o | 06705bf | 2009-03-28 10:59:57 -0400 | [diff] [blame] | 1176 | {Opt_barrier, "barrier"}, |
| 1177 | {Opt_nobarrier, "nobarrier"}, |
Jean Noel Cordenner | 25ec56b | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 1178 | {Opt_i_version, "i_version"}, |
Ross Zwisler | 923ae0f | 2015-02-16 15:59:38 -0800 | [diff] [blame] | 1179 | {Opt_dax, "dax"}, |
Alex Tomas | c9de560 | 2008-01-29 00:19:52 -0500 | [diff] [blame] | 1180 | {Opt_stripe, "stripe=%u"}, |
Alex Tomas | 6476924 | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 1181 | {Opt_delalloc, "delalloc"}, |
Theodore Ts'o | a26f499 | 2015-02-02 00:37:02 -0500 | [diff] [blame] | 1182 | {Opt_lazytime, "lazytime"}, |
| 1183 | {Opt_nolazytime, "nolazytime"}, |
Aneesh Kumar K.V | dd919b9 | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 1184 | {Opt_nodelalloc, "nodelalloc"}, |
Jan Kara | 36ade45 | 2013-01-28 09:30:52 -0500 | [diff] [blame] | 1185 | {Opt_removed, "mblk_io_submit"}, |
| 1186 | {Opt_removed, "nomblk_io_submit"}, |
Theodore Ts'o | 6fd058f | 2009-05-17 15:38:01 -0400 | [diff] [blame] | 1187 | {Opt_block_validity, "block_validity"}, |
| 1188 | {Opt_noblock_validity, "noblock_validity"}, |
Theodore Ts'o | 240799c | 2008-10-09 23:53:47 -0400 | [diff] [blame] | 1189 | {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, |
Theodore Ts'o | b3881f7 | 2009-01-05 22:46:26 -0500 | [diff] [blame] | 1190 | {Opt_journal_ioprio, "journal_ioprio=%u"}, |
Theodore Ts'o | afd4672 | 2009-03-16 23:12:23 -0400 | [diff] [blame] | 1191 | {Opt_auto_da_alloc, "auto_da_alloc=%u"}, |
Theodore Ts'o | 06705bf | 2009-03-28 10:59:57 -0400 | [diff] [blame] | 1192 | {Opt_auto_da_alloc, "auto_da_alloc"}, |
| 1193 | {Opt_noauto_da_alloc, "noauto_da_alloc"}, |
Jiaying Zhang | 744692d | 2010-03-04 16:14:02 -0500 | [diff] [blame] | 1194 | {Opt_dioread_nolock, "dioread_nolock"}, |
| 1195 | {Opt_dioread_lock, "dioread_lock"}, |
Eric Sandeen | 5328e63 | 2009-11-19 14:25:42 -0500 | [diff] [blame] | 1196 | {Opt_discard, "discard"}, |
| 1197 | {Opt_nodiscard, "nodiscard"}, |
Theodore Ts'o | fc6cb1c | 2011-12-12 22:06:18 -0500 | [diff] [blame] | 1198 | {Opt_init_itable, "init_itable=%u"}, |
| 1199 | {Opt_init_itable, "init_itable"}, |
| 1200 | {Opt_noinit_itable, "noinit_itable"}, |
Theodore Ts'o | df981d0 | 2012-08-17 09:48:17 -0400 | [diff] [blame] | 1201 | {Opt_max_dir_size_kb, "max_dir_size_kb=%u"}, |
Theodore Ts'o | 6ddb244 | 2015-04-16 01:56:00 -0400 | [diff] [blame] | 1202 | {Opt_test_dummy_encryption, "test_dummy_encryption"}, |
Theodore Ts'o | c7198b9 | 2012-03-04 22:00:53 -0500 | [diff] [blame] | 1203 | {Opt_removed, "check=none"}, /* mount option from ext2/3 */ |
| 1204 | {Opt_removed, "nocheck"}, /* mount option from ext2/3 */ |
| 1205 | {Opt_removed, "reservation"}, /* mount option from ext2/3 */ |
| 1206 | {Opt_removed, "noreservation"}, /* mount option from ext2/3 */ |
| 1207 | {Opt_removed, "journal=%u"}, /* mount option from ext2/3 */ |
Josef Bacik | f3f12fa | 2008-04-29 22:05:28 -0400 | [diff] [blame] | 1208 | {Opt_err, NULL}, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1209 | }; |
| 1210 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1211 | static ext4_fsblk_t get_sb_block(void **data) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1212 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1213 | ext4_fsblk_t sb_block; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1214 | char *options = (char *) *data; |
| 1215 | |
| 1216 | if (!options || strncmp(options, "sb=", 3) != 0) |
| 1217 | return 1; /* Default location */ |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 1218 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1219 | options += 3; |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 1220 | /* TODO: use simple_strtoll with >32bit ext4 */ |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1221 | sb_block = simple_strtoul(options, &options, 0); |
| 1222 | if (*options && *options != ',') { |
Theodore Ts'o | 4776004f | 2008-09-08 23:00:52 -0400 | [diff] [blame] | 1223 | printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1224 | (char *) *data); |
| 1225 | return 1; |
| 1226 | } |
| 1227 | if (*options == ',') |
| 1228 | options++; |
| 1229 | *data = (void *) options; |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 1230 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1231 | return sb_block; |
| 1232 | } |
| 1233 | |
Theodore Ts'o | b3881f7 | 2009-01-05 22:46:26 -0500 | [diff] [blame] | 1234 | #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) |
Dmitry Monakhov | 437ca0f | 2010-03-01 22:29:21 -0500 | [diff] [blame] | 1235 | static char deprecated_msg[] = "Mount option \"%s\" will be removed by %s\n" |
| 1236 | "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; |
Theodore Ts'o | b3881f7 | 2009-01-05 22:46:26 -0500 | [diff] [blame] | 1237 | |
Dmitry Monakhov | 56c50f1 | 2010-03-01 23:28:41 -0500 | [diff] [blame] | 1238 | #ifdef CONFIG_QUOTA |
| 1239 | static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) |
| 1240 | { |
| 1241 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
| 1242 | char *qname; |
Chen Gang | 03dafb5 | 2013-01-24 23:24:58 -0500 | [diff] [blame] | 1243 | int ret = -1; |
Dmitry Monakhov | 56c50f1 | 2010-03-01 23:28:41 -0500 | [diff] [blame] | 1244 | |
| 1245 | if (sb_any_quota_loaded(sb) && |
| 1246 | !sbi->s_qf_names[qtype]) { |
| 1247 | ext4_msg(sb, KERN_ERR, |
| 1248 | "Cannot change journaled " |
| 1249 | "quota options when quota turned on"); |
Theodore Ts'o | 57f73c2 | 2012-04-16 18:55:26 -0400 | [diff] [blame] | 1250 | return -1; |
Dmitry Monakhov | 56c50f1 | 2010-03-01 23:28:41 -0500 | [diff] [blame] | 1251 | } |
Jan Kara | 262b466 | 2013-03-02 17:57:08 -0500 | [diff] [blame] | 1252 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) { |
| 1253 | ext4_msg(sb, KERN_ERR, "Cannot set journaled quota options " |
| 1254 | "when QUOTA feature is enabled"); |
| 1255 | return -1; |
| 1256 | } |
Dmitry Monakhov | 56c50f1 | 2010-03-01 23:28:41 -0500 | [diff] [blame] | 1257 | qname = match_strdup(args); |
| 1258 | if (!qname) { |
| 1259 | ext4_msg(sb, KERN_ERR, |
| 1260 | "Not enough memory for storing quotafile name"); |
Theodore Ts'o | 57f73c2 | 2012-04-16 18:55:26 -0400 | [diff] [blame] | 1261 | return -1; |
Dmitry Monakhov | 56c50f1 | 2010-03-01 23:28:41 -0500 | [diff] [blame] | 1262 | } |
Chen Gang | 03dafb5 | 2013-01-24 23:24:58 -0500 | [diff] [blame] | 1263 | if (sbi->s_qf_names[qtype]) { |
| 1264 | if (strcmp(sbi->s_qf_names[qtype], qname) == 0) |
| 1265 | ret = 1; |
| 1266 | else |
| 1267 | ext4_msg(sb, KERN_ERR, |
| 1268 | "%s quota file already specified", |
| 1269 | QTYPE2NAME(qtype)); |
| 1270 | goto errout; |
Dmitry Monakhov | 56c50f1 | 2010-03-01 23:28:41 -0500 | [diff] [blame] | 1271 | } |
Chen Gang | 03dafb5 | 2013-01-24 23:24:58 -0500 | [diff] [blame] | 1272 | if (strchr(qname, '/')) { |
Dmitry Monakhov | 56c50f1 | 2010-03-01 23:28:41 -0500 | [diff] [blame] | 1273 | ext4_msg(sb, KERN_ERR, |
| 1274 | "quotafile must be on filesystem root"); |
Chen Gang | 03dafb5 | 2013-01-24 23:24:58 -0500 | [diff] [blame] | 1275 | goto errout; |
Dmitry Monakhov | 56c50f1 | 2010-03-01 23:28:41 -0500 | [diff] [blame] | 1276 | } |
Chen Gang | 03dafb5 | 2013-01-24 23:24:58 -0500 | [diff] [blame] | 1277 | sbi->s_qf_names[qtype] = qname; |
Theodore Ts'o | fd8c37e | 2010-12-15 20:26:48 -0500 | [diff] [blame] | 1278 | set_opt(sb, QUOTA); |
Dmitry Monakhov | 56c50f1 | 2010-03-01 23:28:41 -0500 | [diff] [blame] | 1279 | return 1; |
Chen Gang | 03dafb5 | 2013-01-24 23:24:58 -0500 | [diff] [blame] | 1280 | errout: |
| 1281 | kfree(qname); |
| 1282 | return ret; |
Dmitry Monakhov | 56c50f1 | 2010-03-01 23:28:41 -0500 | [diff] [blame] | 1283 | } |
| 1284 | |
| 1285 | static int clear_qf_name(struct super_block *sb, int qtype) |
| 1286 | { |
| 1287 | |
| 1288 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
| 1289 | |
| 1290 | if (sb_any_quota_loaded(sb) && |
| 1291 | sbi->s_qf_names[qtype]) { |
| 1292 | ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" |
| 1293 | " when quota turned on"); |
Theodore Ts'o | 57f73c2 | 2012-04-16 18:55:26 -0400 | [diff] [blame] | 1294 | return -1; |
Dmitry Monakhov | 56c50f1 | 2010-03-01 23:28:41 -0500 | [diff] [blame] | 1295 | } |
Chen Gang | 03dafb5 | 2013-01-24 23:24:58 -0500 | [diff] [blame] | 1296 | kfree(sbi->s_qf_names[qtype]); |
Dmitry Monakhov | 56c50f1 | 2010-03-01 23:28:41 -0500 | [diff] [blame] | 1297 | sbi->s_qf_names[qtype] = NULL; |
| 1298 | return 1; |
| 1299 | } |
| 1300 | #endif |
| 1301 | |
Theodore Ts'o | 26092bf | 2012-03-03 23:20:47 -0500 | [diff] [blame] | 1302 | #define MOPT_SET 0x0001 |
| 1303 | #define MOPT_CLEAR 0x0002 |
| 1304 | #define MOPT_NOSUPPORT 0x0004 |
| 1305 | #define MOPT_EXPLICIT 0x0008 |
| 1306 | #define MOPT_CLEAR_ERR 0x0010 |
| 1307 | #define MOPT_GTE0 0x0020 |
| 1308 | #ifdef CONFIG_QUOTA |
| 1309 | #define MOPT_Q 0 |
| 1310 | #define MOPT_QFMT 0x0040 |
| 1311 | #else |
| 1312 | #define MOPT_Q MOPT_NOSUPPORT |
| 1313 | #define MOPT_QFMT MOPT_NOSUPPORT |
| 1314 | #endif |
| 1315 | #define MOPT_DATAJ 0x0080 |
Theodore Ts'o | 8dc0aa8 | 2013-02-02 23:38:39 -0500 | [diff] [blame] | 1316 | #define MOPT_NO_EXT2 0x0100 |
| 1317 | #define MOPT_NO_EXT3 0x0200 |
| 1318 | #define MOPT_EXT4_ONLY (MOPT_NO_EXT2 | MOPT_NO_EXT3) |
Eric Sandeen | ad4eec6 | 2013-08-28 19:05:07 -0400 | [diff] [blame] | 1319 | #define MOPT_STRING 0x0400 |
Theodore Ts'o | 26092bf | 2012-03-03 23:20:47 -0500 | [diff] [blame] | 1320 | |
| 1321 | static const struct mount_opts { |
| 1322 | int token; |
| 1323 | int mount_opt; |
| 1324 | int flags; |
| 1325 | } ext4_mount_opts[] = { |
| 1326 | {Opt_minix_df, EXT4_MOUNT_MINIX_DF, MOPT_SET}, |
| 1327 | {Opt_bsd_df, EXT4_MOUNT_MINIX_DF, MOPT_CLEAR}, |
| 1328 | {Opt_grpid, EXT4_MOUNT_GRPID, MOPT_SET}, |
| 1329 | {Opt_nogrpid, EXT4_MOUNT_GRPID, MOPT_CLEAR}, |
Theodore Ts'o | 26092bf | 2012-03-03 23:20:47 -0500 | [diff] [blame] | 1330 | {Opt_block_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_SET}, |
| 1331 | {Opt_noblock_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_CLEAR}, |
Theodore Ts'o | 8dc0aa8 | 2013-02-02 23:38:39 -0500 | [diff] [blame] | 1332 | {Opt_dioread_nolock, EXT4_MOUNT_DIOREAD_NOLOCK, |
| 1333 | MOPT_EXT4_ONLY | MOPT_SET}, |
| 1334 | {Opt_dioread_lock, EXT4_MOUNT_DIOREAD_NOLOCK, |
| 1335 | MOPT_EXT4_ONLY | MOPT_CLEAR}, |
Theodore Ts'o | 26092bf | 2012-03-03 23:20:47 -0500 | [diff] [blame] | 1336 | {Opt_discard, EXT4_MOUNT_DISCARD, MOPT_SET}, |
| 1337 | {Opt_nodiscard, EXT4_MOUNT_DISCARD, MOPT_CLEAR}, |
Theodore Ts'o | 8dc0aa8 | 2013-02-02 23:38:39 -0500 | [diff] [blame] | 1338 | {Opt_delalloc, EXT4_MOUNT_DELALLOC, |
| 1339 | MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, |
| 1340 | {Opt_nodelalloc, EXT4_MOUNT_DELALLOC, |
Theodore Ts'o | 59d9fa5 | 2013-08-08 23:01:24 -0400 | [diff] [blame] | 1341 | MOPT_EXT4_ONLY | MOPT_CLEAR}, |
Darrick J. Wong | c6d3d56 | 2014-11-25 16:20:50 -0500 | [diff] [blame] | 1342 | {Opt_nojournal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, |
| 1343 | MOPT_EXT4_ONLY | MOPT_CLEAR}, |
Theodore Ts'o | 8dc0aa8 | 2013-02-02 23:38:39 -0500 | [diff] [blame] | 1344 | {Opt_journal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, |
| 1345 | MOPT_EXT4_ONLY | MOPT_SET}, |
Theodore Ts'o | 26092bf | 2012-03-03 23:20:47 -0500 | [diff] [blame] | 1346 | {Opt_journal_async_commit, (EXT4_MOUNT_JOURNAL_ASYNC_COMMIT | |
Theodore Ts'o | 8dc0aa8 | 2013-02-02 23:38:39 -0500 | [diff] [blame] | 1347 | EXT4_MOUNT_JOURNAL_CHECKSUM), |
| 1348 | MOPT_EXT4_ONLY | MOPT_SET}, |
| 1349 | {Opt_noload, EXT4_MOUNT_NOLOAD, MOPT_NO_EXT2 | MOPT_SET}, |
Theodore Ts'o | 26092bf | 2012-03-03 23:20:47 -0500 | [diff] [blame] | 1350 | {Opt_err_panic, EXT4_MOUNT_ERRORS_PANIC, MOPT_SET | MOPT_CLEAR_ERR}, |
| 1351 | {Opt_err_ro, EXT4_MOUNT_ERRORS_RO, MOPT_SET | MOPT_CLEAR_ERR}, |
| 1352 | {Opt_err_cont, EXT4_MOUNT_ERRORS_CONT, MOPT_SET | MOPT_CLEAR_ERR}, |
Theodore Ts'o | 8dc0aa8 | 2013-02-02 23:38:39 -0500 | [diff] [blame] | 1353 | {Opt_data_err_abort, EXT4_MOUNT_DATA_ERR_ABORT, |
| 1354 | MOPT_NO_EXT2 | MOPT_SET}, |
| 1355 | {Opt_data_err_ignore, EXT4_MOUNT_DATA_ERR_ABORT, |
| 1356 | MOPT_NO_EXT2 | MOPT_CLEAR}, |
Theodore Ts'o | 26092bf | 2012-03-03 23:20:47 -0500 | [diff] [blame] | 1357 | {Opt_barrier, EXT4_MOUNT_BARRIER, MOPT_SET}, |
| 1358 | {Opt_nobarrier, EXT4_MOUNT_BARRIER, MOPT_CLEAR}, |
| 1359 | {Opt_noauto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_SET}, |
| 1360 | {Opt_auto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_CLEAR}, |
| 1361 | {Opt_noinit_itable, EXT4_MOUNT_INIT_INODE_TABLE, MOPT_CLEAR}, |
| 1362 | {Opt_commit, 0, MOPT_GTE0}, |
| 1363 | {Opt_max_batch_time, 0, MOPT_GTE0}, |
| 1364 | {Opt_min_batch_time, 0, MOPT_GTE0}, |
| 1365 | {Opt_inode_readahead_blks, 0, MOPT_GTE0}, |
| 1366 | {Opt_init_itable, 0, MOPT_GTE0}, |
Ross Zwisler | 923ae0f | 2015-02-16 15:59:38 -0800 | [diff] [blame] | 1367 | {Opt_dax, EXT4_MOUNT_DAX, MOPT_SET}, |
Theodore Ts'o | 26092bf | 2012-03-03 23:20:47 -0500 | [diff] [blame] | 1368 | {Opt_stripe, 0, MOPT_GTE0}, |
Jan Kara | 0efb3b2 | 2013-02-02 22:52:19 -0500 | [diff] [blame] | 1369 | {Opt_resuid, 0, MOPT_GTE0}, |
| 1370 | {Opt_resgid, 0, MOPT_GTE0}, |
| 1371 | {Opt_journal_dev, 0, MOPT_GTE0}, |
Eric Sandeen | ad4eec6 | 2013-08-28 19:05:07 -0400 | [diff] [blame] | 1372 | {Opt_journal_path, 0, MOPT_STRING}, |
Jan Kara | 0efb3b2 | 2013-02-02 22:52:19 -0500 | [diff] [blame] | 1373 | {Opt_journal_ioprio, 0, MOPT_GTE0}, |
Theodore Ts'o | 8dc0aa8 | 2013-02-02 23:38:39 -0500 | [diff] [blame] | 1374 | {Opt_data_journal, EXT4_MOUNT_JOURNAL_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, |
| 1375 | {Opt_data_ordered, EXT4_MOUNT_ORDERED_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, |
| 1376 | {Opt_data_writeback, EXT4_MOUNT_WRITEBACK_DATA, |
| 1377 | MOPT_NO_EXT2 | MOPT_DATAJ}, |
Theodore Ts'o | 26092bf | 2012-03-03 23:20:47 -0500 | [diff] [blame] | 1378 | {Opt_user_xattr, EXT4_MOUNT_XATTR_USER, MOPT_SET}, |
| 1379 | {Opt_nouser_xattr, EXT4_MOUNT_XATTR_USER, MOPT_CLEAR}, |
Theodore Ts'o | 26092bf | 2012-03-03 23:20:47 -0500 | [diff] [blame] | 1380 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
| 1381 | {Opt_acl, EXT4_MOUNT_POSIX_ACL, MOPT_SET}, |
| 1382 | {Opt_noacl, EXT4_MOUNT_POSIX_ACL, MOPT_CLEAR}, |
| 1383 | #else |
| 1384 | {Opt_acl, 0, MOPT_NOSUPPORT}, |
| 1385 | {Opt_noacl, 0, MOPT_NOSUPPORT}, |
| 1386 | #endif |
| 1387 | {Opt_nouid32, EXT4_MOUNT_NO_UID32, MOPT_SET}, |
| 1388 | {Opt_debug, EXT4_MOUNT_DEBUG, MOPT_SET}, |
| 1389 | {Opt_quota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, MOPT_SET | MOPT_Q}, |
| 1390 | {Opt_usrquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, |
| 1391 | MOPT_SET | MOPT_Q}, |
| 1392 | {Opt_grpquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_GRPQUOTA, |
| 1393 | MOPT_SET | MOPT_Q}, |
| 1394 | {Opt_noquota, (EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | |
| 1395 | EXT4_MOUNT_GRPQUOTA), MOPT_CLEAR | MOPT_Q}, |
| 1396 | {Opt_usrjquota, 0, MOPT_Q}, |
| 1397 | {Opt_grpjquota, 0, MOPT_Q}, |
| 1398 | {Opt_offusrjquota, 0, MOPT_Q}, |
| 1399 | {Opt_offgrpjquota, 0, MOPT_Q}, |
| 1400 | {Opt_jqfmt_vfsold, QFMT_VFS_OLD, MOPT_QFMT}, |
| 1401 | {Opt_jqfmt_vfsv0, QFMT_VFS_V0, MOPT_QFMT}, |
| 1402 | {Opt_jqfmt_vfsv1, QFMT_VFS_V1, MOPT_QFMT}, |
Theodore Ts'o | df981d0 | 2012-08-17 09:48:17 -0400 | [diff] [blame] | 1403 | {Opt_max_dir_size_kb, 0, MOPT_GTE0}, |
Theodore Ts'o | 6ddb244 | 2015-04-16 01:56:00 -0400 | [diff] [blame] | 1404 | {Opt_test_dummy_encryption, 0, MOPT_GTE0}, |
Theodore Ts'o | 26092bf | 2012-03-03 23:20:47 -0500 | [diff] [blame] | 1405 | {Opt_err, 0, 0} |
| 1406 | }; |
| 1407 | |
| 1408 | static int handle_mount_opt(struct super_block *sb, char *opt, int token, |
| 1409 | substring_t *args, unsigned long *journal_devnum, |
| 1410 | unsigned int *journal_ioprio, int is_remount) |
| 1411 | { |
| 1412 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
| 1413 | const struct mount_opts *m; |
Eric W. Biederman | 08cefc7 | 2012-02-07 15:41:49 -0800 | [diff] [blame] | 1414 | kuid_t uid; |
| 1415 | kgid_t gid; |
Theodore Ts'o | 26092bf | 2012-03-03 23:20:47 -0500 | [diff] [blame] | 1416 | int arg = 0; |
| 1417 | |
Theodore Ts'o | 57f73c2 | 2012-04-16 18:55:26 -0400 | [diff] [blame] | 1418 | #ifdef CONFIG_QUOTA |
| 1419 | if (token == Opt_usrjquota) |
| 1420 | return set_qf_name(sb, USRQUOTA, &args[0]); |
| 1421 | else if (token == Opt_grpjquota) |
| 1422 | return set_qf_name(sb, GRPQUOTA, &args[0]); |
| 1423 | else if (token == Opt_offusrjquota) |
| 1424 | return clear_qf_name(sb, USRQUOTA); |
| 1425 | else if (token == Opt_offgrpjquota) |
| 1426 | return clear_qf_name(sb, GRPQUOTA); |
| 1427 | #endif |
Theodore Ts'o | 26092bf | 2012-03-03 23:20:47 -0500 | [diff] [blame] | 1428 | switch (token) { |
Theodore Ts'o | f704860 | 2012-03-04 22:06:20 -0500 | [diff] [blame] | 1429 | case Opt_noacl: |
| 1430 | case Opt_nouser_xattr: |
| 1431 | ext4_msg(sb, KERN_WARNING, deprecated_msg, opt, "3.5"); |
| 1432 | break; |
Theodore Ts'o | 26092bf | 2012-03-03 23:20:47 -0500 | [diff] [blame] | 1433 | case Opt_sb: |
| 1434 | return 1; /* handled by get_sb_block() */ |
| 1435 | case Opt_removed: |
Jan Kara | 5f3633e | 2013-02-02 23:09:36 -0500 | [diff] [blame] | 1436 | ext4_msg(sb, KERN_WARNING, "Ignoring removed %s option", opt); |
Theodore Ts'o | 26092bf | 2012-03-03 23:20:47 -0500 | [diff] [blame] | 1437 | return 1; |
Theodore Ts'o | 26092bf | 2012-03-03 23:20:47 -0500 | [diff] [blame] | 1438 | case Opt_abort: |
| 1439 | sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; |
| 1440 | return 1; |
| 1441 | case Opt_i_version: |
| 1442 | sb->s_flags |= MS_I_VERSION; |
| 1443 | return 1; |
Theodore Ts'o | a26f499 | 2015-02-02 00:37:02 -0500 | [diff] [blame] | 1444 | case Opt_lazytime: |
| 1445 | sb->s_flags |= MS_LAZYTIME; |
| 1446 | return 1; |
| 1447 | case Opt_nolazytime: |
| 1448 | sb->s_flags &= ~MS_LAZYTIME; |
| 1449 | return 1; |
Theodore Ts'o | 26092bf | 2012-03-03 23:20:47 -0500 | [diff] [blame] | 1450 | } |
| 1451 | |
Jan Kara | 5f3633e | 2013-02-02 23:09:36 -0500 | [diff] [blame] | 1452 | for (m = ext4_mount_opts; m->token != Opt_err; m++) |
| 1453 | if (token == m->token) |
| 1454 | break; |
Theodore Ts'o | 26092bf | 2012-03-03 23:20:47 -0500 | [diff] [blame] | 1455 | |
Jan Kara | 5f3633e | 2013-02-02 23:09:36 -0500 | [diff] [blame] | 1456 | if (m->token == Opt_err) { |
| 1457 | ext4_msg(sb, KERN_ERR, "Unrecognized mount option \"%s\" " |
| 1458 | "or missing value", opt); |
| 1459 | return -1; |
Theodore Ts'o | 26092bf | 2012-03-03 23:20:47 -0500 | [diff] [blame] | 1460 | } |
Jan Kara | 5f3633e | 2013-02-02 23:09:36 -0500 | [diff] [blame] | 1461 | |
Theodore Ts'o | 8dc0aa8 | 2013-02-02 23:38:39 -0500 | [diff] [blame] | 1462 | if ((m->flags & MOPT_NO_EXT2) && IS_EXT2_SB(sb)) { |
| 1463 | ext4_msg(sb, KERN_ERR, |
| 1464 | "Mount option \"%s\" incompatible with ext2", opt); |
| 1465 | return -1; |
| 1466 | } |
| 1467 | if ((m->flags & MOPT_NO_EXT3) && IS_EXT3_SB(sb)) { |
| 1468 | ext4_msg(sb, KERN_ERR, |
| 1469 | "Mount option \"%s\" incompatible with ext3", opt); |
| 1470 | return -1; |
| 1471 | } |
| 1472 | |
Eric Sandeen | ad4eec6 | 2013-08-28 19:05:07 -0400 | [diff] [blame] | 1473 | if (args->from && !(m->flags & MOPT_STRING) && match_int(args, &arg)) |
Jan Kara | 5f3633e | 2013-02-02 23:09:36 -0500 | [diff] [blame] | 1474 | return -1; |
| 1475 | if (args->from && (m->flags & MOPT_GTE0) && (arg < 0)) |
| 1476 | return -1; |
| 1477 | if (m->flags & MOPT_EXPLICIT) |
| 1478 | set_opt2(sb, EXPLICIT_DELALLOC); |
| 1479 | if (m->flags & MOPT_CLEAR_ERR) |
| 1480 | clear_opt(sb, ERRORS_MASK); |
| 1481 | if (token == Opt_noquota && sb_any_quota_loaded(sb)) { |
| 1482 | ext4_msg(sb, KERN_ERR, "Cannot change quota " |
| 1483 | "options when quota turned on"); |
| 1484 | return -1; |
| 1485 | } |
| 1486 | |
| 1487 | if (m->flags & MOPT_NOSUPPORT) { |
| 1488 | ext4_msg(sb, KERN_ERR, "%s option not supported", opt); |
| 1489 | } else if (token == Opt_commit) { |
| 1490 | if (arg == 0) |
| 1491 | arg = JBD2_DEFAULT_MAX_COMMIT_AGE; |
| 1492 | sbi->s_commit_interval = HZ * arg; |
| 1493 | } else if (token == Opt_max_batch_time) { |
Jan Kara | 5f3633e | 2013-02-02 23:09:36 -0500 | [diff] [blame] | 1494 | sbi->s_max_batch_time = arg; |
| 1495 | } else if (token == Opt_min_batch_time) { |
| 1496 | sbi->s_min_batch_time = arg; |
| 1497 | } else if (token == Opt_inode_readahead_blks) { |
Jan Kara | e33e60e | 2013-02-02 23:14:31 -0500 | [diff] [blame] | 1498 | if (arg && (arg > (1 << 30) || !is_power_of_2(arg))) { |
| 1499 | ext4_msg(sb, KERN_ERR, |
| 1500 | "EXT4-fs: inode_readahead_blks must be " |
| 1501 | "0 or a power of 2 smaller than 2^31"); |
Jan Kara | 5f3633e | 2013-02-02 23:09:36 -0500 | [diff] [blame] | 1502 | return -1; |
| 1503 | } |
| 1504 | sbi->s_inode_readahead_blks = arg; |
| 1505 | } else if (token == Opt_init_itable) { |
| 1506 | set_opt(sb, INIT_INODE_TABLE); |
| 1507 | if (!args->from) |
| 1508 | arg = EXT4_DEF_LI_WAIT_MULT; |
| 1509 | sbi->s_li_wait_mult = arg; |
| 1510 | } else if (token == Opt_max_dir_size_kb) { |
| 1511 | sbi->s_max_dir_size_kb = arg; |
| 1512 | } else if (token == Opt_stripe) { |
| 1513 | sbi->s_stripe = arg; |
| 1514 | } else if (token == Opt_resuid) { |
| 1515 | uid = make_kuid(current_user_ns(), arg); |
| 1516 | if (!uid_valid(uid)) { |
| 1517 | ext4_msg(sb, KERN_ERR, "Invalid uid value %d", arg); |
| 1518 | return -1; |
| 1519 | } |
| 1520 | sbi->s_resuid = uid; |
| 1521 | } else if (token == Opt_resgid) { |
| 1522 | gid = make_kgid(current_user_ns(), arg); |
| 1523 | if (!gid_valid(gid)) { |
| 1524 | ext4_msg(sb, KERN_ERR, "Invalid gid value %d", arg); |
| 1525 | return -1; |
| 1526 | } |
| 1527 | sbi->s_resgid = gid; |
| 1528 | } else if (token == Opt_journal_dev) { |
| 1529 | if (is_remount) { |
| 1530 | ext4_msg(sb, KERN_ERR, |
| 1531 | "Cannot specify journal on remount"); |
| 1532 | return -1; |
| 1533 | } |
| 1534 | *journal_devnum = arg; |
Eric Sandeen | ad4eec6 | 2013-08-28 19:05:07 -0400 | [diff] [blame] | 1535 | } else if (token == Opt_journal_path) { |
| 1536 | char *journal_path; |
| 1537 | struct inode *journal_inode; |
| 1538 | struct path path; |
| 1539 | int error; |
| 1540 | |
| 1541 | if (is_remount) { |
| 1542 | ext4_msg(sb, KERN_ERR, |
| 1543 | "Cannot specify journal on remount"); |
| 1544 | return -1; |
| 1545 | } |
| 1546 | journal_path = match_strdup(&args[0]); |
| 1547 | if (!journal_path) { |
| 1548 | ext4_msg(sb, KERN_ERR, "error: could not dup " |
| 1549 | "journal device string"); |
| 1550 | return -1; |
| 1551 | } |
| 1552 | |
| 1553 | error = kern_path(journal_path, LOOKUP_FOLLOW, &path); |
| 1554 | if (error) { |
| 1555 | ext4_msg(sb, KERN_ERR, "error: could not find " |
| 1556 | "journal device path: error %d", error); |
| 1557 | kfree(journal_path); |
| 1558 | return -1; |
| 1559 | } |
| 1560 | |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 1561 | journal_inode = d_inode(path.dentry); |
Eric Sandeen | ad4eec6 | 2013-08-28 19:05:07 -0400 | [diff] [blame] | 1562 | if (!S_ISBLK(journal_inode->i_mode)) { |
| 1563 | ext4_msg(sb, KERN_ERR, "error: journal path %s " |
| 1564 | "is not a block device", journal_path); |
| 1565 | path_put(&path); |
| 1566 | kfree(journal_path); |
| 1567 | return -1; |
| 1568 | } |
| 1569 | |
| 1570 | *journal_devnum = new_encode_dev(journal_inode->i_rdev); |
| 1571 | path_put(&path); |
| 1572 | kfree(journal_path); |
Jan Kara | 5f3633e | 2013-02-02 23:09:36 -0500 | [diff] [blame] | 1573 | } else if (token == Opt_journal_ioprio) { |
| 1574 | if (arg > 7) { |
| 1575 | ext4_msg(sb, KERN_ERR, "Invalid journal IO priority" |
| 1576 | " (must be 0-7)"); |
| 1577 | return -1; |
| 1578 | } |
| 1579 | *journal_ioprio = |
| 1580 | IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, arg); |
Theodore Ts'o | 6ddb244 | 2015-04-16 01:56:00 -0400 | [diff] [blame] | 1581 | } else if (token == Opt_test_dummy_encryption) { |
| 1582 | #ifdef CONFIG_EXT4_FS_ENCRYPTION |
| 1583 | sbi->s_mount_flags |= EXT4_MF_TEST_DUMMY_ENCRYPTION; |
| 1584 | ext4_msg(sb, KERN_WARNING, |
| 1585 | "Test dummy encryption mode enabled"); |
| 1586 | #else |
| 1587 | ext4_msg(sb, KERN_WARNING, |
| 1588 | "Test dummy encryption mount option ignored"); |
| 1589 | #endif |
Jan Kara | 5f3633e | 2013-02-02 23:09:36 -0500 | [diff] [blame] | 1590 | } else if (m->flags & MOPT_DATAJ) { |
| 1591 | if (is_remount) { |
| 1592 | if (!sbi->s_journal) |
| 1593 | ext4_msg(sb, KERN_WARNING, "Remounting file system with no journal so ignoring journalled data option"); |
| 1594 | else if (test_opt(sb, DATA_FLAGS) != m->mount_opt) { |
| 1595 | ext4_msg(sb, KERN_ERR, |
| 1596 | "Cannot change data mode on remount"); |
| 1597 | return -1; |
| 1598 | } |
| 1599 | } else { |
| 1600 | clear_opt(sb, DATA_FLAGS); |
| 1601 | sbi->s_mount_opt |= m->mount_opt; |
| 1602 | } |
| 1603 | #ifdef CONFIG_QUOTA |
| 1604 | } else if (m->flags & MOPT_QFMT) { |
| 1605 | if (sb_any_quota_loaded(sb) && |
| 1606 | sbi->s_jquota_fmt != m->mount_opt) { |
| 1607 | ext4_msg(sb, KERN_ERR, "Cannot change journaled " |
| 1608 | "quota options when quota turned on"); |
| 1609 | return -1; |
| 1610 | } |
Jan Kara | 262b466 | 2013-03-02 17:57:08 -0500 | [diff] [blame] | 1611 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, |
| 1612 | EXT4_FEATURE_RO_COMPAT_QUOTA)) { |
| 1613 | ext4_msg(sb, KERN_ERR, |
| 1614 | "Cannot set journaled quota options " |
| 1615 | "when QUOTA feature is enabled"); |
| 1616 | return -1; |
| 1617 | } |
Jan Kara | 5f3633e | 2013-02-02 23:09:36 -0500 | [diff] [blame] | 1618 | sbi->s_jquota_fmt = m->mount_opt; |
| 1619 | #endif |
Ross Zwisler | 923ae0f | 2015-02-16 15:59:38 -0800 | [diff] [blame] | 1620 | #ifndef CONFIG_FS_DAX |
| 1621 | } else if (token == Opt_dax) { |
| 1622 | ext4_msg(sb, KERN_INFO, "dax option not supported"); |
| 1623 | return -1; |
| 1624 | #endif |
Jan Kara | 5f3633e | 2013-02-02 23:09:36 -0500 | [diff] [blame] | 1625 | } else { |
| 1626 | if (!args->from) |
| 1627 | arg = 1; |
| 1628 | if (m->flags & MOPT_CLEAR) |
| 1629 | arg = !arg; |
| 1630 | else if (unlikely(!(m->flags & MOPT_SET))) { |
| 1631 | ext4_msg(sb, KERN_WARNING, |
| 1632 | "buggy handling of option %s", opt); |
| 1633 | WARN_ON(1); |
| 1634 | return -1; |
| 1635 | } |
| 1636 | if (arg != 0) |
| 1637 | sbi->s_mount_opt |= m->mount_opt; |
| 1638 | else |
| 1639 | sbi->s_mount_opt &= ~m->mount_opt; |
| 1640 | } |
| 1641 | return 1; |
Theodore Ts'o | 26092bf | 2012-03-03 23:20:47 -0500 | [diff] [blame] | 1642 | } |
| 1643 | |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 1644 | static int parse_options(char *options, struct super_block *sb, |
Theodore Ts'o | c319106 | 2009-01-06 11:14:25 -0500 | [diff] [blame] | 1645 | unsigned long *journal_devnum, |
Theodore Ts'o | b3881f7 | 2009-01-05 22:46:26 -0500 | [diff] [blame] | 1646 | unsigned int *journal_ioprio, |
Eric Sandeen | 661aa52 | 2012-02-20 17:53:04 -0500 | [diff] [blame] | 1647 | int is_remount) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1648 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1649 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 1650 | char *p; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1651 | substring_t args[MAX_OPT_ARGS]; |
Theodore Ts'o | 26092bf | 2012-03-03 23:20:47 -0500 | [diff] [blame] | 1652 | int token; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1653 | |
| 1654 | if (!options) |
| 1655 | return 1; |
| 1656 | |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 1657 | while ((p = strsep(&options, ",")) != NULL) { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1658 | if (!*p) |
| 1659 | continue; |
Eric Sandeen | 15121c1 | 2010-02-15 20:17:55 -0500 | [diff] [blame] | 1660 | /* |
| 1661 | * Initialize args struct so we know whether arg was |
| 1662 | * found; some options take optional arguments. |
| 1663 | */ |
Sachin Kamat | caecd0a | 2012-08-18 22:29:18 -0400 | [diff] [blame] | 1664 | args[0].to = args[0].from = NULL; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1665 | token = match_token(p, tokens, args); |
Theodore Ts'o | 26092bf | 2012-03-03 23:20:47 -0500 | [diff] [blame] | 1666 | if (handle_mount_opt(sb, p, token, args, journal_devnum, |
| 1667 | journal_ioprio, is_remount) < 0) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1668 | return 0; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1669 | } |
| 1670 | #ifdef CONFIG_QUOTA |
Jan Kara | 262b466 | 2013-03-02 17:57:08 -0500 | [diff] [blame] | 1671 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) && |
| 1672 | (test_opt(sb, USRQUOTA) || test_opt(sb, GRPQUOTA))) { |
| 1673 | ext4_msg(sb, KERN_ERR, "Cannot set quota options when QUOTA " |
| 1674 | "feature is enabled"); |
| 1675 | return 0; |
| 1676 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1677 | if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { |
Dmitry Monakhov | 482a742 | 2010-02-24 11:35:32 -0500 | [diff] [blame] | 1678 | if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) |
Theodore Ts'o | fd8c37e | 2010-12-15 20:26:48 -0500 | [diff] [blame] | 1679 | clear_opt(sb, USRQUOTA); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1680 | |
Dmitry Monakhov | 482a742 | 2010-02-24 11:35:32 -0500 | [diff] [blame] | 1681 | if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) |
Theodore Ts'o | fd8c37e | 2010-12-15 20:26:48 -0500 | [diff] [blame] | 1682 | clear_opt(sb, GRPQUOTA); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1683 | |
Dmitry Monakhov | 56c50f1 | 2010-03-01 23:28:41 -0500 | [diff] [blame] | 1684 | if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 1685 | ext4_msg(sb, KERN_ERR, "old and new quota " |
| 1686 | "format mixing"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1687 | return 0; |
| 1688 | } |
| 1689 | |
| 1690 | if (!sbi->s_jquota_fmt) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 1691 | ext4_msg(sb, KERN_ERR, "journaled quota format " |
| 1692 | "not specified"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1693 | return 0; |
| 1694 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1695 | } |
| 1696 | #endif |
Jan Kara | 261cb20c | 2012-12-20 00:07:18 -0500 | [diff] [blame] | 1697 | if (test_opt(sb, DIOREAD_NOLOCK)) { |
| 1698 | int blocksize = |
| 1699 | BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size); |
| 1700 | |
| 1701 | if (blocksize < PAGE_CACHE_SIZE) { |
| 1702 | ext4_msg(sb, KERN_ERR, "can't mount with " |
| 1703 | "dioread_nolock if block size != PAGE_SIZE"); |
| 1704 | return 0; |
| 1705 | } |
| 1706 | } |
Jan Kara | d4f7610 | 2014-11-25 20:19:17 -0500 | [diff] [blame] | 1707 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA && |
| 1708 | test_opt(sb, JOURNAL_ASYNC_COMMIT)) { |
| 1709 | ext4_msg(sb, KERN_ERR, "can't mount with journal_async_commit " |
| 1710 | "in data=ordered mode"); |
| 1711 | return 0; |
| 1712 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1713 | return 1; |
| 1714 | } |
| 1715 | |
Theodore Ts'o | 2adf6da | 2012-03-03 23:20:50 -0500 | [diff] [blame] | 1716 | static inline void ext4_show_quota_options(struct seq_file *seq, |
| 1717 | struct super_block *sb) |
| 1718 | { |
| 1719 | #if defined(CONFIG_QUOTA) |
| 1720 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
| 1721 | |
| 1722 | if (sbi->s_jquota_fmt) { |
| 1723 | char *fmtname = ""; |
| 1724 | |
| 1725 | switch (sbi->s_jquota_fmt) { |
| 1726 | case QFMT_VFS_OLD: |
| 1727 | fmtname = "vfsold"; |
| 1728 | break; |
| 1729 | case QFMT_VFS_V0: |
| 1730 | fmtname = "vfsv0"; |
| 1731 | break; |
| 1732 | case QFMT_VFS_V1: |
| 1733 | fmtname = "vfsv1"; |
| 1734 | break; |
| 1735 | } |
| 1736 | seq_printf(seq, ",jqfmt=%s", fmtname); |
| 1737 | } |
| 1738 | |
| 1739 | if (sbi->s_qf_names[USRQUOTA]) |
| 1740 | seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); |
| 1741 | |
| 1742 | if (sbi->s_qf_names[GRPQUOTA]) |
| 1743 | seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); |
Theodore Ts'o | 2adf6da | 2012-03-03 23:20:50 -0500 | [diff] [blame] | 1744 | #endif |
| 1745 | } |
| 1746 | |
Theodore Ts'o | 5a916be | 2012-03-04 19:27:31 -0500 | [diff] [blame] | 1747 | static const char *token2str(int token) |
| 1748 | { |
Herton Ronaldo Krzesinski | 50df9fd | 2012-09-23 22:49:12 -0400 | [diff] [blame] | 1749 | const struct match_token *t; |
Theodore Ts'o | 5a916be | 2012-03-04 19:27:31 -0500 | [diff] [blame] | 1750 | |
| 1751 | for (t = tokens; t->token != Opt_err; t++) |
| 1752 | if (t->token == token && !strchr(t->pattern, '=')) |
| 1753 | break; |
| 1754 | return t->pattern; |
| 1755 | } |
| 1756 | |
Theodore Ts'o | 2adf6da | 2012-03-03 23:20:50 -0500 | [diff] [blame] | 1757 | /* |
| 1758 | * Show an option if |
| 1759 | * - it's set to a non-default value OR |
| 1760 | * - if the per-sb default is different from the global default |
| 1761 | */ |
Theodore Ts'o | 66acdcf | 2012-03-04 20:21:38 -0500 | [diff] [blame] | 1762 | static int _ext4_show_options(struct seq_file *seq, struct super_block *sb, |
| 1763 | int nodefs) |
Theodore Ts'o | 2adf6da | 2012-03-03 23:20:50 -0500 | [diff] [blame] | 1764 | { |
Theodore Ts'o | 2adf6da | 2012-03-03 23:20:50 -0500 | [diff] [blame] | 1765 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
| 1766 | struct ext4_super_block *es = sbi->s_es; |
Theodore Ts'o | 66acdcf | 2012-03-04 20:21:38 -0500 | [diff] [blame] | 1767 | int def_errors, def_mount_opt = nodefs ? 0 : sbi->s_def_mount_opt; |
Theodore Ts'o | 5a916be | 2012-03-04 19:27:31 -0500 | [diff] [blame] | 1768 | const struct mount_opts *m; |
Theodore Ts'o | 66acdcf | 2012-03-04 20:21:38 -0500 | [diff] [blame] | 1769 | char sep = nodefs ? '\n' : ','; |
Theodore Ts'o | 2adf6da | 2012-03-03 23:20:50 -0500 | [diff] [blame] | 1770 | |
Theodore Ts'o | 66acdcf | 2012-03-04 20:21:38 -0500 | [diff] [blame] | 1771 | #define SEQ_OPTS_PUTS(str) seq_printf(seq, "%c" str, sep) |
| 1772 | #define SEQ_OPTS_PRINT(str, arg) seq_printf(seq, "%c" str, sep, arg) |
Theodore Ts'o | 2adf6da | 2012-03-03 23:20:50 -0500 | [diff] [blame] | 1773 | |
| 1774 | if (sbi->s_sb_block != 1) |
Theodore Ts'o | 5a916be | 2012-03-04 19:27:31 -0500 | [diff] [blame] | 1775 | SEQ_OPTS_PRINT("sb=%llu", sbi->s_sb_block); |
| 1776 | |
| 1777 | for (m = ext4_mount_opts; m->token != Opt_err; m++) { |
| 1778 | int want_set = m->flags & MOPT_SET; |
| 1779 | if (((m->flags & (MOPT_SET|MOPT_CLEAR)) == 0) || |
| 1780 | (m->flags & MOPT_CLEAR_ERR)) |
| 1781 | continue; |
Theodore Ts'o | 66acdcf | 2012-03-04 20:21:38 -0500 | [diff] [blame] | 1782 | if (!(m->mount_opt & (sbi->s_mount_opt ^ def_mount_opt))) |
Theodore Ts'o | 5a916be | 2012-03-04 19:27:31 -0500 | [diff] [blame] | 1783 | continue; /* skip if same as the default */ |
| 1784 | if ((want_set && |
| 1785 | (sbi->s_mount_opt & m->mount_opt) != m->mount_opt) || |
| 1786 | (!want_set && (sbi->s_mount_opt & m->mount_opt))) |
| 1787 | continue; /* select Opt_noFoo vs Opt_Foo */ |
| 1788 | SEQ_OPTS_PRINT("%s", token2str(m->token)); |
| 1789 | } |
| 1790 | |
Eric W. Biederman | 08cefc7 | 2012-02-07 15:41:49 -0800 | [diff] [blame] | 1791 | if (nodefs || !uid_eq(sbi->s_resuid, make_kuid(&init_user_ns, EXT4_DEF_RESUID)) || |
Theodore Ts'o | 5a916be | 2012-03-04 19:27:31 -0500 | [diff] [blame] | 1792 | le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) |
Eric W. Biederman | 08cefc7 | 2012-02-07 15:41:49 -0800 | [diff] [blame] | 1793 | SEQ_OPTS_PRINT("resuid=%u", |
| 1794 | from_kuid_munged(&init_user_ns, sbi->s_resuid)); |
| 1795 | if (nodefs || !gid_eq(sbi->s_resgid, make_kgid(&init_user_ns, EXT4_DEF_RESGID)) || |
Theodore Ts'o | 5a916be | 2012-03-04 19:27:31 -0500 | [diff] [blame] | 1796 | le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) |
Eric W. Biederman | 08cefc7 | 2012-02-07 15:41:49 -0800 | [diff] [blame] | 1797 | SEQ_OPTS_PRINT("resgid=%u", |
| 1798 | from_kgid_munged(&init_user_ns, sbi->s_resgid)); |
Theodore Ts'o | 66acdcf | 2012-03-04 20:21:38 -0500 | [diff] [blame] | 1799 | def_errors = nodefs ? -1 : le16_to_cpu(es->s_errors); |
Theodore Ts'o | 5a916be | 2012-03-04 19:27:31 -0500 | [diff] [blame] | 1800 | if (test_opt(sb, ERRORS_RO) && def_errors != EXT4_ERRORS_RO) |
| 1801 | SEQ_OPTS_PUTS("errors=remount-ro"); |
Theodore Ts'o | 2adf6da | 2012-03-03 23:20:50 -0500 | [diff] [blame] | 1802 | if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) |
Theodore Ts'o | 5a916be | 2012-03-04 19:27:31 -0500 | [diff] [blame] | 1803 | SEQ_OPTS_PUTS("errors=continue"); |
Theodore Ts'o | 2adf6da | 2012-03-03 23:20:50 -0500 | [diff] [blame] | 1804 | if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) |
Theodore Ts'o | 5a916be | 2012-03-04 19:27:31 -0500 | [diff] [blame] | 1805 | SEQ_OPTS_PUTS("errors=panic"); |
Theodore Ts'o | 66acdcf | 2012-03-04 20:21:38 -0500 | [diff] [blame] | 1806 | if (nodefs || sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) |
Theodore Ts'o | 5a916be | 2012-03-04 19:27:31 -0500 | [diff] [blame] | 1807 | SEQ_OPTS_PRINT("commit=%lu", sbi->s_commit_interval / HZ); |
Theodore Ts'o | 66acdcf | 2012-03-04 20:21:38 -0500 | [diff] [blame] | 1808 | if (nodefs || sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) |
Theodore Ts'o | 5a916be | 2012-03-04 19:27:31 -0500 | [diff] [blame] | 1809 | SEQ_OPTS_PRINT("min_batch_time=%u", sbi->s_min_batch_time); |
Theodore Ts'o | 66acdcf | 2012-03-04 20:21:38 -0500 | [diff] [blame] | 1810 | if (nodefs || sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) |
Theodore Ts'o | 5a916be | 2012-03-04 19:27:31 -0500 | [diff] [blame] | 1811 | SEQ_OPTS_PRINT("max_batch_time=%u", sbi->s_max_batch_time); |
Theodore Ts'o | 2adf6da | 2012-03-03 23:20:50 -0500 | [diff] [blame] | 1812 | if (sb->s_flags & MS_I_VERSION) |
Theodore Ts'o | 5a916be | 2012-03-04 19:27:31 -0500 | [diff] [blame] | 1813 | SEQ_OPTS_PUTS("i_version"); |
Theodore Ts'o | 66acdcf | 2012-03-04 20:21:38 -0500 | [diff] [blame] | 1814 | if (nodefs || sbi->s_stripe) |
Theodore Ts'o | 5a916be | 2012-03-04 19:27:31 -0500 | [diff] [blame] | 1815 | SEQ_OPTS_PRINT("stripe=%lu", sbi->s_stripe); |
Theodore Ts'o | 66acdcf | 2012-03-04 20:21:38 -0500 | [diff] [blame] | 1816 | if (EXT4_MOUNT_DATA_FLAGS & (sbi->s_mount_opt ^ def_mount_opt)) { |
Theodore Ts'o | 5a916be | 2012-03-04 19:27:31 -0500 | [diff] [blame] | 1817 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) |
| 1818 | SEQ_OPTS_PUTS("data=journal"); |
| 1819 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) |
| 1820 | SEQ_OPTS_PUTS("data=ordered"); |
| 1821 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) |
| 1822 | SEQ_OPTS_PUTS("data=writeback"); |
| 1823 | } |
Theodore Ts'o | 66acdcf | 2012-03-04 20:21:38 -0500 | [diff] [blame] | 1824 | if (nodefs || |
| 1825 | sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) |
Theodore Ts'o | 5a916be | 2012-03-04 19:27:31 -0500 | [diff] [blame] | 1826 | SEQ_OPTS_PRINT("inode_readahead_blks=%u", |
| 1827 | sbi->s_inode_readahead_blks); |
Theodore Ts'o | 2adf6da | 2012-03-03 23:20:50 -0500 | [diff] [blame] | 1828 | |
Theodore Ts'o | 66acdcf | 2012-03-04 20:21:38 -0500 | [diff] [blame] | 1829 | if (nodefs || (test_opt(sb, INIT_INODE_TABLE) && |
| 1830 | (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT))) |
Theodore Ts'o | 5a916be | 2012-03-04 19:27:31 -0500 | [diff] [blame] | 1831 | SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult); |
Theodore Ts'o | df981d0 | 2012-08-17 09:48:17 -0400 | [diff] [blame] | 1832 | if (nodefs || sbi->s_max_dir_size_kb) |
| 1833 | SEQ_OPTS_PRINT("max_dir_size_kb=%u", sbi->s_max_dir_size_kb); |
Theodore Ts'o | 2adf6da | 2012-03-03 23:20:50 -0500 | [diff] [blame] | 1834 | |
| 1835 | ext4_show_quota_options(seq, sb); |
Theodore Ts'o | 2adf6da | 2012-03-03 23:20:50 -0500 | [diff] [blame] | 1836 | return 0; |
| 1837 | } |
| 1838 | |
Theodore Ts'o | 66acdcf | 2012-03-04 20:21:38 -0500 | [diff] [blame] | 1839 | static int ext4_show_options(struct seq_file *seq, struct dentry *root) |
| 1840 | { |
| 1841 | return _ext4_show_options(seq, root->d_sb, 0); |
| 1842 | } |
| 1843 | |
| 1844 | static int options_seq_show(struct seq_file *seq, void *offset) |
| 1845 | { |
| 1846 | struct super_block *sb = seq->private; |
| 1847 | int rc; |
| 1848 | |
| 1849 | seq_puts(seq, (sb->s_flags & MS_RDONLY) ? "ro" : "rw"); |
| 1850 | rc = _ext4_show_options(seq, sb, 1); |
| 1851 | seq_puts(seq, "\n"); |
| 1852 | return rc; |
| 1853 | } |
| 1854 | |
| 1855 | static int options_open_fs(struct inode *inode, struct file *file) |
| 1856 | { |
Al Viro | d9dda78 | 2013-03-31 18:16:14 -0400 | [diff] [blame] | 1857 | return single_open(file, options_seq_show, PDE_DATA(inode)); |
Theodore Ts'o | 66acdcf | 2012-03-04 20:21:38 -0500 | [diff] [blame] | 1858 | } |
| 1859 | |
| 1860 | static const struct file_operations ext4_seq_options_fops = { |
| 1861 | .owner = THIS_MODULE, |
| 1862 | .open = options_open_fs, |
| 1863 | .read = seq_read, |
| 1864 | .llseek = seq_lseek, |
| 1865 | .release = single_release, |
| 1866 | }; |
| 1867 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1868 | static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1869 | int read_only) |
| 1870 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1871 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1872 | int res = 0; |
| 1873 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1874 | if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 1875 | ext4_msg(sb, KERN_ERR, "revision level too high, " |
| 1876 | "forcing read-only mode"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1877 | res = MS_RDONLY; |
| 1878 | } |
| 1879 | if (read_only) |
Theodore Ts'o | 281b599 | 2011-09-09 18:34:51 -0400 | [diff] [blame] | 1880 | goto done; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1881 | if (!(sbi->s_mount_state & EXT4_VALID_FS)) |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 1882 | ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " |
| 1883 | "running e2fsck is recommended"); |
Lukas Czerner | c8b459f | 2014-05-12 12:55:07 -0400 | [diff] [blame] | 1884 | else if (sbi->s_mount_state & EXT4_ERROR_FS) |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 1885 | ext4_msg(sb, KERN_WARNING, |
| 1886 | "warning: mounting fs with errors, " |
| 1887 | "running e2fsck is recommended"); |
Tao Ma | ed3ce80 | 2011-05-18 13:29:57 -0400 | [diff] [blame] | 1888 | else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1889 | le16_to_cpu(es->s_mnt_count) >= |
| 1890 | (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 1891 | ext4_msg(sb, KERN_WARNING, |
| 1892 | "warning: maximal mount count reached, " |
| 1893 | "running e2fsck is recommended"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1894 | else if (le32_to_cpu(es->s_checkinterval) && |
| 1895 | (le32_to_cpu(es->s_lastcheck) + |
| 1896 | le32_to_cpu(es->s_checkinterval) <= get_seconds())) |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 1897 | ext4_msg(sb, KERN_WARNING, |
| 1898 | "warning: checktime reached, " |
| 1899 | "running e2fsck is recommended"); |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 1900 | if (!sbi->s_journal) |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 1901 | es->s_state &= cpu_to_le16(~EXT4_VALID_FS); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1902 | if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1903 | es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); |
Marcin Slusarz | e8546d0 | 2008-04-17 10:38:59 -0400 | [diff] [blame] | 1904 | le16_add_cpu(&es->s_mnt_count, 1); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1905 | es->s_mtime = cpu_to_le32(get_seconds()); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1906 | ext4_update_dynamic_rev(sb); |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 1907 | if (sbi->s_journal) |
| 1908 | EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1909 | |
Theodore Ts'o | e2d6705 | 2009-05-01 00:33:44 -0400 | [diff] [blame] | 1910 | ext4_commit_super(sb, 1); |
Theodore Ts'o | 281b599 | 2011-09-09 18:34:51 -0400 | [diff] [blame] | 1911 | done: |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1912 | if (test_opt(sb, DEBUG)) |
Theodore Ts'o | a9df9a4 | 2009-01-05 22:18:16 -0500 | [diff] [blame] | 1913 | printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " |
Theodore Ts'o | a2595b8 | 2010-12-15 20:30:48 -0500 | [diff] [blame] | 1914 | "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1915 | sb->s_blocksize, |
| 1916 | sbi->s_groups_count, |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1917 | EXT4_BLOCKS_PER_GROUP(sb), |
| 1918 | EXT4_INODES_PER_GROUP(sb), |
Theodore Ts'o | a2595b8 | 2010-12-15 20:30:48 -0500 | [diff] [blame] | 1919 | sbi->s_mount_opt, sbi->s_mount_opt2); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1920 | |
Dan Magenheimer | 7abc52c | 2011-05-26 10:02:03 -0600 | [diff] [blame] | 1921 | cleancache_init_fs(sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1922 | return res; |
| 1923 | } |
| 1924 | |
Theodore Ts'o | 117fff1 | 2012-09-05 01:29:50 -0400 | [diff] [blame] | 1925 | int ext4_alloc_flex_bg_array(struct super_block *sb, ext4_group_t ngroup) |
| 1926 | { |
| 1927 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
| 1928 | struct flex_groups *new_groups; |
| 1929 | int size; |
| 1930 | |
| 1931 | if (!sbi->s_log_groups_per_flex) |
| 1932 | return 0; |
| 1933 | |
| 1934 | size = ext4_flex_group(sbi, ngroup - 1) + 1; |
| 1935 | if (size <= sbi->s_flex_groups_allocated) |
| 1936 | return 0; |
| 1937 | |
| 1938 | size = roundup_pow_of_two(size * sizeof(struct flex_groups)); |
| 1939 | new_groups = ext4_kvzalloc(size, GFP_KERNEL); |
| 1940 | if (!new_groups) { |
| 1941 | ext4_msg(sb, KERN_ERR, "not enough memory for %d flex groups", |
| 1942 | size / (int) sizeof(struct flex_groups)); |
| 1943 | return -ENOMEM; |
| 1944 | } |
| 1945 | |
| 1946 | if (sbi->s_flex_groups) { |
| 1947 | memcpy(new_groups, sbi->s_flex_groups, |
| 1948 | (sbi->s_flex_groups_allocated * |
| 1949 | sizeof(struct flex_groups))); |
Al Viro | b93b41d | 2014-11-20 12:19:11 -0500 | [diff] [blame] | 1950 | kvfree(sbi->s_flex_groups); |
Theodore Ts'o | 117fff1 | 2012-09-05 01:29:50 -0400 | [diff] [blame] | 1951 | } |
| 1952 | sbi->s_flex_groups = new_groups; |
| 1953 | sbi->s_flex_groups_allocated = size / sizeof(struct flex_groups); |
| 1954 | return 0; |
| 1955 | } |
| 1956 | |
Jose R. Santos | 772cb7c | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 1957 | static int ext4_fill_flex_info(struct super_block *sb) |
| 1958 | { |
| 1959 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
| 1960 | struct ext4_group_desc *gdp = NULL; |
Jose R. Santos | 772cb7c | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 1961 | ext4_group_t flex_group; |
Theodore Ts'o | 117fff1 | 2012-09-05 01:29:50 -0400 | [diff] [blame] | 1962 | int i, err; |
Jose R. Santos | 772cb7c | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 1963 | |
Theodore Ts'o | 503358a | 2009-11-23 07:24:46 -0500 | [diff] [blame] | 1964 | sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; |
Xi Wang | d50f2ab | 2012-01-10 11:51:10 -0500 | [diff] [blame] | 1965 | if (sbi->s_log_groups_per_flex < 1 || sbi->s_log_groups_per_flex > 31) { |
Jose R. Santos | 772cb7c | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 1966 | sbi->s_log_groups_per_flex = 0; |
| 1967 | return 1; |
| 1968 | } |
| 1969 | |
Theodore Ts'o | 117fff1 | 2012-09-05 01:29:50 -0400 | [diff] [blame] | 1970 | err = ext4_alloc_flex_bg_array(sb, sbi->s_groups_count); |
| 1971 | if (err) |
Theodore Ts'o | 9933fc0 | 2011-08-01 08:45:02 -0400 | [diff] [blame] | 1972 | goto failed; |
Jose R. Santos | 772cb7c | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 1973 | |
Jose R. Santos | 772cb7c | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 1974 | for (i = 0; i < sbi->s_groups_count; i++) { |
Theodore Ts'o | 88b6edd | 2009-05-25 11:50:39 -0400 | [diff] [blame] | 1975 | gdp = ext4_get_group_desc(sb, i, NULL); |
Jose R. Santos | 772cb7c | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 1976 | |
| 1977 | flex_group = ext4_flex_group(sbi, i); |
Theodore Ts'o | 7ad9bb6 | 2009-09-11 16:51:28 -0400 | [diff] [blame] | 1978 | atomic_add(ext4_free_inodes_count(sb, gdp), |
| 1979 | &sbi->s_flex_groups[flex_group].free_inodes); |
Theodore Ts'o | 90ba983 | 2013-03-11 23:39:59 -0400 | [diff] [blame] | 1980 | atomic64_add(ext4_free_group_clusters(sb, gdp), |
| 1981 | &sbi->s_flex_groups[flex_group].free_clusters); |
Theodore Ts'o | 7ad9bb6 | 2009-09-11 16:51:28 -0400 | [diff] [blame] | 1982 | atomic_add(ext4_used_dirs_count(sb, gdp), |
| 1983 | &sbi->s_flex_groups[flex_group].used_dirs); |
Jose R. Santos | 772cb7c | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 1984 | } |
| 1985 | |
| 1986 | return 1; |
| 1987 | failed: |
| 1988 | return 0; |
| 1989 | } |
| 1990 | |
Darrick J. Wong | feb0ab3 | 2012-04-29 18:45:10 -0400 | [diff] [blame] | 1991 | static __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group, |
| 1992 | struct ext4_group_desc *gdp) |
Andreas Dilger | 717d50e | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 1993 | { |
Darrick J. Wong | feb0ab3 | 2012-04-29 18:45:10 -0400 | [diff] [blame] | 1994 | int offset; |
Andreas Dilger | 717d50e | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 1995 | __u16 crc = 0; |
Darrick J. Wong | feb0ab3 | 2012-04-29 18:45:10 -0400 | [diff] [blame] | 1996 | __le32 le_group = cpu_to_le32(block_group); |
Andreas Dilger | 717d50e | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 1997 | |
Dmitry Monakhov | 9aa5d32 | 2014-10-13 03:36:16 -0400 | [diff] [blame] | 1998 | if (ext4_has_metadata_csum(sbi->s_sb)) { |
Darrick J. Wong | feb0ab3 | 2012-04-29 18:45:10 -0400 | [diff] [blame] | 1999 | /* Use new metadata_csum algorithm */ |
Theodore Ts'o | d6a7710 | 2013-04-09 23:59:55 -0400 | [diff] [blame] | 2000 | __le16 save_csum; |
Darrick J. Wong | feb0ab3 | 2012-04-29 18:45:10 -0400 | [diff] [blame] | 2001 | __u32 csum32; |
Andreas Dilger | 717d50e | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 2002 | |
Theodore Ts'o | d6a7710 | 2013-04-09 23:59:55 -0400 | [diff] [blame] | 2003 | save_csum = gdp->bg_checksum; |
Darrick J. Wong | feb0ab3 | 2012-04-29 18:45:10 -0400 | [diff] [blame] | 2004 | gdp->bg_checksum = 0; |
| 2005 | csum32 = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&le_group, |
| 2006 | sizeof(le_group)); |
| 2007 | csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp, |
| 2008 | sbi->s_desc_size); |
Theodore Ts'o | d6a7710 | 2013-04-09 23:59:55 -0400 | [diff] [blame] | 2009 | gdp->bg_checksum = save_csum; |
Darrick J. Wong | feb0ab3 | 2012-04-29 18:45:10 -0400 | [diff] [blame] | 2010 | |
| 2011 | crc = csum32 & 0xFFFF; |
| 2012 | goto out; |
Andreas Dilger | 717d50e | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 2013 | } |
| 2014 | |
Darrick J. Wong | feb0ab3 | 2012-04-29 18:45:10 -0400 | [diff] [blame] | 2015 | /* old crc16 code */ |
Darrick J. Wong | 813d32f | 2014-10-14 02:35:49 -0400 | [diff] [blame] | 2016 | if (!(sbi->s_es->s_feature_ro_compat & |
| 2017 | cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM))) |
| 2018 | return 0; |
| 2019 | |
Darrick J. Wong | feb0ab3 | 2012-04-29 18:45:10 -0400 | [diff] [blame] | 2020 | offset = offsetof(struct ext4_group_desc, bg_checksum); |
| 2021 | |
| 2022 | crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); |
| 2023 | crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); |
| 2024 | crc = crc16(crc, (__u8 *)gdp, offset); |
| 2025 | offset += sizeof(gdp->bg_checksum); /* skip checksum */ |
| 2026 | /* for checksum of struct ext4_group_desc do the rest...*/ |
| 2027 | if ((sbi->s_es->s_feature_incompat & |
| 2028 | cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT)) && |
| 2029 | offset < le16_to_cpu(sbi->s_es->s_desc_size)) |
| 2030 | crc = crc16(crc, (__u8 *)gdp + offset, |
| 2031 | le16_to_cpu(sbi->s_es->s_desc_size) - |
| 2032 | offset); |
| 2033 | |
| 2034 | out: |
Andreas Dilger | 717d50e | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 2035 | return cpu_to_le16(crc); |
| 2036 | } |
| 2037 | |
Darrick J. Wong | feb0ab3 | 2012-04-29 18:45:10 -0400 | [diff] [blame] | 2038 | int ext4_group_desc_csum_verify(struct super_block *sb, __u32 block_group, |
Andreas Dilger | 717d50e | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 2039 | struct ext4_group_desc *gdp) |
| 2040 | { |
Darrick J. Wong | feb0ab3 | 2012-04-29 18:45:10 -0400 | [diff] [blame] | 2041 | if (ext4_has_group_desc_csum(sb) && |
| 2042 | (gdp->bg_checksum != ext4_group_desc_csum(EXT4_SB(sb), |
| 2043 | block_group, gdp))) |
Andreas Dilger | 717d50e | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 2044 | return 0; |
| 2045 | |
| 2046 | return 1; |
| 2047 | } |
| 2048 | |
Darrick J. Wong | feb0ab3 | 2012-04-29 18:45:10 -0400 | [diff] [blame] | 2049 | void ext4_group_desc_csum_set(struct super_block *sb, __u32 block_group, |
| 2050 | struct ext4_group_desc *gdp) |
| 2051 | { |
| 2052 | if (!ext4_has_group_desc_csum(sb)) |
| 2053 | return; |
| 2054 | gdp->bg_checksum = ext4_group_desc_csum(EXT4_SB(sb), block_group, gdp); |
| 2055 | } |
| 2056 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2057 | /* Called at mount-time, super-block is locked */ |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2058 | static int ext4_check_descriptors(struct super_block *sb, |
| 2059 | ext4_group_t *first_not_zeroed) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2060 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2061 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
| 2062 | ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); |
| 2063 | ext4_fsblk_t last_block; |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 2064 | ext4_fsblk_t block_bitmap; |
| 2065 | ext4_fsblk_t inode_bitmap; |
| 2066 | ext4_fsblk_t inode_table; |
Jose R. Santos | ce42158 | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 2067 | int flexbg_flag = 0; |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2068 | ext4_group_t i, grp = sbi->s_groups_count; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2069 | |
Jose R. Santos | ce42158 | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 2070 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) |
| 2071 | flexbg_flag = 1; |
| 2072 | |
Theodore Ts'o | af5bc92 | 2008-09-08 22:25:24 -0400 | [diff] [blame] | 2073 | ext4_debug("Checking group descriptors"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2074 | |
Akinobu Mita | 197cd65a | 2008-02-06 01:40:16 -0800 | [diff] [blame] | 2075 | for (i = 0; i < sbi->s_groups_count; i++) { |
| 2076 | struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); |
| 2077 | |
Jose R. Santos | ce42158 | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 2078 | if (i == sbi->s_groups_count - 1 || flexbg_flag) |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 2079 | last_block = ext4_blocks_count(sbi->s_es) - 1; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2080 | else |
| 2081 | last_block = first_block + |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2082 | (EXT4_BLOCKS_PER_GROUP(sb) - 1); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2083 | |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2084 | if ((grp == sbi->s_groups_count) && |
| 2085 | !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) |
| 2086 | grp = i; |
| 2087 | |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 2088 | block_bitmap = ext4_block_bitmap(sb, gdp); |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 2089 | if (block_bitmap < first_block || block_bitmap > last_block) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 2090 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
Theodore Ts'o | a9df9a4 | 2009-01-05 22:18:16 -0500 | [diff] [blame] | 2091 | "Block bitmap for group %u not in group " |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 2092 | "(block %llu)!", i, block_bitmap); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2093 | return 0; |
| 2094 | } |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 2095 | inode_bitmap = ext4_inode_bitmap(sb, gdp); |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 2096 | if (inode_bitmap < first_block || inode_bitmap > last_block) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 2097 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
Theodore Ts'o | a9df9a4 | 2009-01-05 22:18:16 -0500 | [diff] [blame] | 2098 | "Inode bitmap for group %u not in group " |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 2099 | "(block %llu)!", i, inode_bitmap); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2100 | return 0; |
| 2101 | } |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 2102 | inode_table = ext4_inode_table(sb, gdp); |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 2103 | if (inode_table < first_block || |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 2104 | inode_table + sbi->s_itb_per_group - 1 > last_block) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 2105 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
Theodore Ts'o | a9df9a4 | 2009-01-05 22:18:16 -0500 | [diff] [blame] | 2106 | "Inode table for group %u not in group " |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 2107 | "(block %llu)!", i, inode_table); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2108 | return 0; |
| 2109 | } |
Aneesh Kumar K.V | 955ce5f | 2009-05-02 20:35:09 -0400 | [diff] [blame] | 2110 | ext4_lock_group(sb, i); |
Darrick J. Wong | feb0ab3 | 2012-04-29 18:45:10 -0400 | [diff] [blame] | 2111 | if (!ext4_group_desc_csum_verify(sb, i, gdp)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 2112 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
| 2113 | "Checksum for group %u failed (%u!=%u)", |
| 2114 | i, le16_to_cpu(ext4_group_desc_csum(sbi, i, |
| 2115 | gdp)), le16_to_cpu(gdp->bg_checksum)); |
Li Zefan | 7ee1ec4 | 2008-09-08 10:47:19 -0400 | [diff] [blame] | 2116 | if (!(sb->s_flags & MS_RDONLY)) { |
Aneesh Kumar K.V | 955ce5f | 2009-05-02 20:35:09 -0400 | [diff] [blame] | 2117 | ext4_unlock_group(sb, i); |
Theodore Ts'o | 8a26646 | 2008-07-26 14:34:21 -0400 | [diff] [blame] | 2118 | return 0; |
Li Zefan | 7ee1ec4 | 2008-09-08 10:47:19 -0400 | [diff] [blame] | 2119 | } |
Andreas Dilger | 717d50e | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 2120 | } |
Aneesh Kumar K.V | 955ce5f | 2009-05-02 20:35:09 -0400 | [diff] [blame] | 2121 | ext4_unlock_group(sb, i); |
Jose R. Santos | ce42158 | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 2122 | if (!flexbg_flag) |
| 2123 | first_block += EXT4_BLOCKS_PER_GROUP(sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2124 | } |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2125 | if (NULL != first_not_zeroed) |
| 2126 | *first_not_zeroed = grp; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2127 | return 1; |
| 2128 | } |
| 2129 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2130 | /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2131 | * the superblock) which were deleted from all directories, but held open by |
| 2132 | * a process at the time of a crash. We walk the list and try to delete these |
| 2133 | * inodes at recovery time (only with a read-write filesystem). |
| 2134 | * |
| 2135 | * In order to keep the orphan inode chain consistent during traversal (in |
| 2136 | * case of crash during recovery), we link each inode into the superblock |
| 2137 | * orphan list_head and handle it the same way as an inode deletion during |
| 2138 | * normal operation (which journals the operations for us). |
| 2139 | * |
| 2140 | * We only do an iget() and an iput() on each inode, which is very safe if we |
| 2141 | * accidentally point at an in-use or already deleted inode. The worst that |
| 2142 | * can happen in this case is that we get a "bit already cleared" message from |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2143 | * ext4_free_inode(). The only reason we would point at a wrong inode is if |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2144 | * e2fsck was run on this filesystem, and it must have already done the orphan |
| 2145 | * inode cleanup for us, so we can safely abort without any further action. |
| 2146 | */ |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 2147 | static void ext4_orphan_cleanup(struct super_block *sb, |
| 2148 | struct ext4_super_block *es) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2149 | { |
| 2150 | unsigned int s_flags = sb->s_flags; |
| 2151 | int nr_orphans = 0, nr_truncates = 0; |
| 2152 | #ifdef CONFIG_QUOTA |
| 2153 | int i; |
| 2154 | #endif |
| 2155 | if (!es->s_last_orphan) { |
| 2156 | jbd_debug(4, "no orphan inodes to clean up\n"); |
| 2157 | return; |
| 2158 | } |
| 2159 | |
Eric Sandeen | a8f48a9 | 2006-12-06 20:40:13 -0800 | [diff] [blame] | 2160 | if (bdev_read_only(sb->s_bdev)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 2161 | ext4_msg(sb, KERN_ERR, "write access " |
| 2162 | "unavailable, skipping orphan cleanup"); |
Eric Sandeen | a8f48a9 | 2006-12-06 20:40:13 -0800 | [diff] [blame] | 2163 | return; |
| 2164 | } |
| 2165 | |
Amir Goldstein | d39195c | 2011-02-28 00:53:45 -0500 | [diff] [blame] | 2166 | /* Check if feature set would not allow a r/w mount */ |
| 2167 | if (!ext4_feature_set_ok(sb, 0)) { |
| 2168 | ext4_msg(sb, KERN_INFO, "Skipping orphan cleanup due to " |
| 2169 | "unknown ROCOMPAT features"); |
| 2170 | return; |
| 2171 | } |
| 2172 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2173 | if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { |
Eric Sandeen | c25f9bc | 2012-09-26 23:30:12 -0400 | [diff] [blame] | 2174 | /* don't clear list on RO mount w/ errors */ |
| 2175 | if (es->s_last_orphan && !(s_flags & MS_RDONLY)) { |
Dmitry Monakhov | 8447497 | 2014-09-16 14:52:03 -0400 | [diff] [blame] | 2176 | ext4_msg(sb, KERN_INFO, "Errors on filesystem, " |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2177 | "clearing orphan list.\n"); |
Eric Sandeen | c25f9bc | 2012-09-26 23:30:12 -0400 | [diff] [blame] | 2178 | es->s_last_orphan = 0; |
| 2179 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2180 | jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); |
| 2181 | return; |
| 2182 | } |
| 2183 | |
| 2184 | if (s_flags & MS_RDONLY) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 2185 | ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2186 | sb->s_flags &= ~MS_RDONLY; |
| 2187 | } |
| 2188 | #ifdef CONFIG_QUOTA |
| 2189 | /* Needed for iput() to work correctly and not trash data */ |
| 2190 | sb->s_flags |= MS_ACTIVE; |
| 2191 | /* Turn on quotas so that they are updated correctly */ |
Jan Kara | a2d4a64 | 2014-09-11 11:15:15 -0400 | [diff] [blame] | 2192 | for (i = 0; i < EXT4_MAXQUOTAS; i++) { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2193 | if (EXT4_SB(sb)->s_qf_names[i]) { |
| 2194 | int ret = ext4_quota_on_mount(sb, i); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2195 | if (ret < 0) |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 2196 | ext4_msg(sb, KERN_ERR, |
| 2197 | "Cannot turn on journaled " |
| 2198 | "quota: error %d", ret); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2199 | } |
| 2200 | } |
| 2201 | #endif |
| 2202 | |
| 2203 | while (es->s_last_orphan) { |
| 2204 | struct inode *inode; |
| 2205 | |
Josef Bacik | 97bd42b | 2008-04-29 22:04:56 -0400 | [diff] [blame] | 2206 | inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); |
| 2207 | if (IS_ERR(inode)) { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2208 | es->s_last_orphan = 0; |
| 2209 | break; |
| 2210 | } |
| 2211 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2212 | list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); |
Christoph Hellwig | 871a293 | 2010-03-03 09:05:07 -0500 | [diff] [blame] | 2213 | dquot_initialize(inode); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2214 | if (inode->i_nlink) { |
Paul Taysom | 566370a | 2013-05-28 07:51:21 -0400 | [diff] [blame] | 2215 | if (test_opt(sb, DEBUG)) |
| 2216 | ext4_msg(sb, KERN_DEBUG, |
| 2217 | "%s: truncating inode %lu to %lld bytes", |
| 2218 | __func__, inode->i_ino, inode->i_size); |
Theodore Ts'o | e5f8eab8 | 2008-09-08 22:25:04 -0400 | [diff] [blame] | 2219 | jbd_debug(2, "truncating inode %lu to %lld bytes\n", |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2220 | inode->i_ino, inode->i_size); |
Theodore Ts'o | 721e3eb | 2012-12-27 01:42:48 -0500 | [diff] [blame] | 2221 | mutex_lock(&inode->i_mutex); |
Lukas Czerner | 55f252c | 2013-05-27 23:32:35 -0400 | [diff] [blame] | 2222 | truncate_inode_pages(inode->i_mapping, inode->i_size); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2223 | ext4_truncate(inode); |
Theodore Ts'o | 721e3eb | 2012-12-27 01:42:48 -0500 | [diff] [blame] | 2224 | mutex_unlock(&inode->i_mutex); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2225 | nr_truncates++; |
| 2226 | } else { |
Paul Taysom | 566370a | 2013-05-28 07:51:21 -0400 | [diff] [blame] | 2227 | if (test_opt(sb, DEBUG)) |
| 2228 | ext4_msg(sb, KERN_DEBUG, |
| 2229 | "%s: deleting unreferenced inode %lu", |
| 2230 | __func__, inode->i_ino); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2231 | jbd_debug(2, "deleting unreferenced inode %lu\n", |
| 2232 | inode->i_ino); |
| 2233 | nr_orphans++; |
| 2234 | } |
| 2235 | iput(inode); /* The delete magic happens here! */ |
| 2236 | } |
| 2237 | |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 2238 | #define PLURAL(x) (x), ((x) == 1) ? "" : "s" |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2239 | |
| 2240 | if (nr_orphans) |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 2241 | ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", |
| 2242 | PLURAL(nr_orphans)); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2243 | if (nr_truncates) |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 2244 | ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", |
| 2245 | PLURAL(nr_truncates)); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2246 | #ifdef CONFIG_QUOTA |
| 2247 | /* Turn quotas off */ |
Jan Kara | a2d4a64 | 2014-09-11 11:15:15 -0400 | [diff] [blame] | 2248 | for (i = 0; i < EXT4_MAXQUOTAS; i++) { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2249 | if (sb_dqopt(sb)->files[i]) |
Christoph Hellwig | 287a809 | 2010-05-19 07:16:45 -0400 | [diff] [blame] | 2250 | dquot_quota_off(sb, i); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2251 | } |
| 2252 | #endif |
| 2253 | sb->s_flags = s_flags; /* Restore MS_RDONLY status */ |
| 2254 | } |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 2255 | |
Eric Sandeen | cd2291a | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 2256 | /* |
| 2257 | * Maximal extent format file size. |
| 2258 | * Resulting logical blkno at s_maxbytes must fit in our on-disk |
| 2259 | * extent format containers, within a sector_t, and within i_blocks |
| 2260 | * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, |
| 2261 | * so that won't be a limiting factor. |
| 2262 | * |
Lukas Czerner | f17722f | 2011-06-06 00:05:17 -0400 | [diff] [blame] | 2263 | * However there is other limiting factor. We do store extents in the form |
| 2264 | * of starting block and length, hence the resulting length of the extent |
| 2265 | * covering maximum file size must fit into on-disk format containers as |
| 2266 | * well. Given that length is always by 1 unit bigger than max unit (because |
| 2267 | * we count 0 as well) we have to lower the s_maxbytes by one fs block. |
| 2268 | * |
Eric Sandeen | cd2291a | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 2269 | * Note, this does *not* consider any metadata overhead for vfs i_blocks. |
| 2270 | */ |
Theodore Ts'o | f287a1a | 2008-10-16 22:50:48 -0400 | [diff] [blame] | 2271 | static loff_t ext4_max_size(int blkbits, int has_huge_files) |
Eric Sandeen | cd2291a | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 2272 | { |
| 2273 | loff_t res; |
| 2274 | loff_t upper_limit = MAX_LFS_FILESIZE; |
| 2275 | |
| 2276 | /* small i_blocks in vfs inode? */ |
Theodore Ts'o | f287a1a | 2008-10-16 22:50:48 -0400 | [diff] [blame] | 2277 | if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { |
Eric Sandeen | cd2291a | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 2278 | /* |
Bartlomiej Zolnierkiewicz | 90c699a | 2009-06-19 08:08:50 +0200 | [diff] [blame] | 2279 | * CONFIG_LBDAF is not enabled implies the inode |
Eric Sandeen | cd2291a | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 2280 | * i_block represent total blocks in 512 bytes |
| 2281 | * 32 == size of vfs inode i_blocks * 8 |
| 2282 | */ |
| 2283 | upper_limit = (1LL << 32) - 1; |
| 2284 | |
| 2285 | /* total blocks in file system block size */ |
| 2286 | upper_limit >>= (blkbits - 9); |
| 2287 | upper_limit <<= blkbits; |
| 2288 | } |
| 2289 | |
Lukas Czerner | f17722f | 2011-06-06 00:05:17 -0400 | [diff] [blame] | 2290 | /* |
| 2291 | * 32-bit extent-start container, ee_block. We lower the maxbytes |
| 2292 | * by one fs block, so ee_len can cover the extent of maximum file |
| 2293 | * size |
| 2294 | */ |
| 2295 | res = (1LL << 32) - 1; |
Eric Sandeen | cd2291a | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 2296 | res <<= blkbits; |
Eric Sandeen | cd2291a | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 2297 | |
| 2298 | /* Sanity check against vm- & vfs- imposed limits */ |
| 2299 | if (res > upper_limit) |
| 2300 | res = upper_limit; |
| 2301 | |
| 2302 | return res; |
| 2303 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2304 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2305 | /* |
Eric Sandeen | cd2291a | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 2306 | * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect |
Aneesh Kumar K.V | 0fc1b45 | 2008-01-28 23:58:26 -0500 | [diff] [blame] | 2307 | * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. |
| 2308 | * We need to be 1 filesystem block less than the 2^48 sector limit. |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2309 | */ |
Theodore Ts'o | f287a1a | 2008-10-16 22:50:48 -0400 | [diff] [blame] | 2310 | static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2311 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2312 | loff_t res = EXT4_NDIR_BLOCKS; |
Aneesh Kumar K.V | 0fc1b45 | 2008-01-28 23:58:26 -0500 | [diff] [blame] | 2313 | int meta_blocks; |
| 2314 | loff_t upper_limit; |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 2315 | /* This is calculated to be the largest file size for a dense, block |
| 2316 | * mapped file such that the file's total number of 512-byte sectors, |
| 2317 | * including data and all indirect blocks, does not exceed (2^48 - 1). |
| 2318 | * |
| 2319 | * __u32 i_blocks_lo and _u16 i_blocks_high represent the total |
| 2320 | * number of 512-byte sectors of the file. |
Aneesh Kumar K.V | 0fc1b45 | 2008-01-28 23:58:26 -0500 | [diff] [blame] | 2321 | */ |
| 2322 | |
Theodore Ts'o | f287a1a | 2008-10-16 22:50:48 -0400 | [diff] [blame] | 2323 | if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { |
Aneesh Kumar K.V | 0fc1b45 | 2008-01-28 23:58:26 -0500 | [diff] [blame] | 2324 | /* |
Bartlomiej Zolnierkiewicz | 90c699a | 2009-06-19 08:08:50 +0200 | [diff] [blame] | 2325 | * !has_huge_files or CONFIG_LBDAF not enabled implies that |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 2326 | * the inode i_block field represents total file blocks in |
| 2327 | * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 |
Aneesh Kumar K.V | 0fc1b45 | 2008-01-28 23:58:26 -0500 | [diff] [blame] | 2328 | */ |
| 2329 | upper_limit = (1LL << 32) - 1; |
| 2330 | |
| 2331 | /* total blocks in file system block size */ |
| 2332 | upper_limit >>= (bits - 9); |
| 2333 | |
| 2334 | } else { |
Aneesh Kumar K.V | 8180a56 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 2335 | /* |
| 2336 | * We use 48 bit ext4_inode i_blocks |
| 2337 | * With EXT4_HUGE_FILE_FL set the i_blocks |
| 2338 | * represent total number of blocks in |
| 2339 | * file system block size |
| 2340 | */ |
Aneesh Kumar K.V | 0fc1b45 | 2008-01-28 23:58:26 -0500 | [diff] [blame] | 2341 | upper_limit = (1LL << 48) - 1; |
| 2342 | |
Aneesh Kumar K.V | 0fc1b45 | 2008-01-28 23:58:26 -0500 | [diff] [blame] | 2343 | } |
| 2344 | |
| 2345 | /* indirect blocks */ |
| 2346 | meta_blocks = 1; |
| 2347 | /* double indirect blocks */ |
| 2348 | meta_blocks += 1 + (1LL << (bits-2)); |
| 2349 | /* tripple indirect blocks */ |
| 2350 | meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); |
| 2351 | |
| 2352 | upper_limit -= meta_blocks; |
| 2353 | upper_limit <<= bits; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2354 | |
| 2355 | res += 1LL << (bits-2); |
| 2356 | res += 1LL << (2*(bits-2)); |
| 2357 | res += 1LL << (3*(bits-2)); |
| 2358 | res <<= bits; |
| 2359 | if (res > upper_limit) |
| 2360 | res = upper_limit; |
Aneesh Kumar K.V | 0fc1b45 | 2008-01-28 23:58:26 -0500 | [diff] [blame] | 2361 | |
| 2362 | if (res > MAX_LFS_FILESIZE) |
| 2363 | res = MAX_LFS_FILESIZE; |
| 2364 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2365 | return res; |
| 2366 | } |
| 2367 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2368 | static ext4_fsblk_t descriptor_loc(struct super_block *sb, |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 2369 | ext4_fsblk_t logical_sb_block, int nr) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2370 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2371 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
Avantika Mathur | fd2d429 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 2372 | ext4_group_t bg, first_meta_bg; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2373 | int has_super = 0; |
| 2374 | |
| 2375 | first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); |
| 2376 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2377 | if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2378 | nr < first_meta_bg) |
Andrew Morton | 70bbb3e | 2006-10-11 01:21:20 -0700 | [diff] [blame] | 2379 | return logical_sb_block + nr + 1; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2380 | bg = sbi->s_desc_per_block * nr; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2381 | if (ext4_bg_has_super(sb, bg)) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2382 | has_super = 1; |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 2383 | |
Darrick J. Wong | bd63f6b | 2014-05-12 10:06:27 -0400 | [diff] [blame] | 2384 | /* |
| 2385 | * If we have a meta_bg fs with 1k blocks, group 0's GDT is at |
| 2386 | * block 2, not 1. If s_first_data_block == 0 (bigalloc is enabled |
| 2387 | * on modern mke2fs or blksize > 1k on older mke2fs) then we must |
| 2388 | * compensate. |
| 2389 | */ |
| 2390 | if (sb->s_blocksize == 1024 && nr == 0 && |
| 2391 | le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block) == 0) |
| 2392 | has_super++; |
| 2393 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2394 | return (has_super + ext4_group_first_block_no(sb, bg)); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2395 | } |
| 2396 | |
Alex Tomas | c9de560 | 2008-01-29 00:19:52 -0500 | [diff] [blame] | 2397 | /** |
| 2398 | * ext4_get_stripe_size: Get the stripe size. |
| 2399 | * @sbi: In memory super block info |
| 2400 | * |
| 2401 | * If we have specified it via mount option, then |
| 2402 | * use the mount option value. If the value specified at mount time is |
| 2403 | * greater than the blocks per group use the super block value. |
| 2404 | * If the super block value is greater than blocks per group return 0. |
| 2405 | * Allocator needs it be less than blocks per group. |
| 2406 | * |
| 2407 | */ |
| 2408 | static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) |
| 2409 | { |
| 2410 | unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); |
| 2411 | unsigned long stripe_width = |
| 2412 | le32_to_cpu(sbi->s_es->s_raid_stripe_width); |
Dan Ehrenberg | 3eb0865 | 2011-07-17 21:18:51 -0400 | [diff] [blame] | 2413 | int ret; |
Alex Tomas | c9de560 | 2008-01-29 00:19:52 -0500 | [diff] [blame] | 2414 | |
| 2415 | if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) |
Dan Ehrenberg | 3eb0865 | 2011-07-17 21:18:51 -0400 | [diff] [blame] | 2416 | ret = sbi->s_stripe; |
| 2417 | else if (stripe_width <= sbi->s_blocks_per_group) |
| 2418 | ret = stripe_width; |
| 2419 | else if (stride <= sbi->s_blocks_per_group) |
| 2420 | ret = stride; |
| 2421 | else |
| 2422 | ret = 0; |
Alex Tomas | c9de560 | 2008-01-29 00:19:52 -0500 | [diff] [blame] | 2423 | |
Dan Ehrenberg | 3eb0865 | 2011-07-17 21:18:51 -0400 | [diff] [blame] | 2424 | /* |
| 2425 | * If the stripe width is 1, this makes no sense and |
| 2426 | * we set it to 0 to turn off stripe handling code. |
| 2427 | */ |
| 2428 | if (ret <= 1) |
| 2429 | ret = 0; |
Alex Tomas | c9de560 | 2008-01-29 00:19:52 -0500 | [diff] [blame] | 2430 | |
Dan Ehrenberg | 3eb0865 | 2011-07-17 21:18:51 -0400 | [diff] [blame] | 2431 | return ret; |
Alex Tomas | c9de560 | 2008-01-29 00:19:52 -0500 | [diff] [blame] | 2432 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2433 | |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 2434 | /* sysfs supprt */ |
| 2435 | |
| 2436 | struct ext4_attr { |
| 2437 | struct attribute attr; |
| 2438 | ssize_t (*show)(struct ext4_attr *, struct ext4_sb_info *, char *); |
Theodore Ts'o | 60e6679 | 2010-05-17 07:00:00 -0400 | [diff] [blame] | 2439 | ssize_t (*store)(struct ext4_attr *, struct ext4_sb_info *, |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 2440 | const char *, size_t); |
Jan Kara | f2d50a6 | 2013-06-04 12:51:16 -0400 | [diff] [blame] | 2441 | union { |
| 2442 | int offset; |
| 2443 | int deprecated_val; |
| 2444 | } u; |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 2445 | }; |
| 2446 | |
Lukas Czerner | 27dd438 | 2013-04-09 22:11:22 -0400 | [diff] [blame] | 2447 | static int parse_strtoull(const char *buf, |
| 2448 | unsigned long long max, unsigned long long *value) |
| 2449 | { |
| 2450 | int ret; |
| 2451 | |
| 2452 | ret = kstrtoull(skip_spaces(buf), 0, value); |
| 2453 | if (!ret && *value > max) |
| 2454 | ret = -EINVAL; |
| 2455 | return ret; |
| 2456 | } |
| 2457 | |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 2458 | static ssize_t delayed_allocation_blocks_show(struct ext4_attr *a, |
| 2459 | struct ext4_sb_info *sbi, |
| 2460 | char *buf) |
| 2461 | { |
| 2462 | return snprintf(buf, PAGE_SIZE, "%llu\n", |
Aditya Kali | 7b415bf | 2011-09-09 19:04:51 -0400 | [diff] [blame] | 2463 | (s64) EXT4_C2B(sbi, |
| 2464 | percpu_counter_sum(&sbi->s_dirtyclusters_counter))); |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 2465 | } |
| 2466 | |
| 2467 | static ssize_t session_write_kbytes_show(struct ext4_attr *a, |
| 2468 | struct ext4_sb_info *sbi, char *buf) |
| 2469 | { |
| 2470 | struct super_block *sb = sbi->s_buddy_cache->i_sb; |
| 2471 | |
Theodore Ts'o | f613dfc | 2010-07-27 11:56:08 -0400 | [diff] [blame] | 2472 | if (!sb->s_bdev->bd_part) |
| 2473 | return snprintf(buf, PAGE_SIZE, "0\n"); |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 2474 | return snprintf(buf, PAGE_SIZE, "%lu\n", |
| 2475 | (part_stat_read(sb->s_bdev->bd_part, sectors[1]) - |
| 2476 | sbi->s_sectors_written_start) >> 1); |
| 2477 | } |
| 2478 | |
| 2479 | static ssize_t lifetime_write_kbytes_show(struct ext4_attr *a, |
| 2480 | struct ext4_sb_info *sbi, char *buf) |
| 2481 | { |
| 2482 | struct super_block *sb = sbi->s_buddy_cache->i_sb; |
| 2483 | |
Theodore Ts'o | f613dfc | 2010-07-27 11:56:08 -0400 | [diff] [blame] | 2484 | if (!sb->s_bdev->bd_part) |
| 2485 | return snprintf(buf, PAGE_SIZE, "0\n"); |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 2486 | return snprintf(buf, PAGE_SIZE, "%llu\n", |
Andrew Morton | a6b43e3 | 2009-12-23 07:48:08 -0500 | [diff] [blame] | 2487 | (unsigned long long)(sbi->s_kbytes_written + |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 2488 | ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - |
Andrew Morton | a6b43e3 | 2009-12-23 07:48:08 -0500 | [diff] [blame] | 2489 | EXT4_SB(sb)->s_sectors_written_start) >> 1))); |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 2490 | } |
| 2491 | |
| 2492 | static ssize_t inode_readahead_blks_store(struct ext4_attr *a, |
| 2493 | struct ext4_sb_info *sbi, |
| 2494 | const char *buf, size_t count) |
| 2495 | { |
| 2496 | unsigned long t; |
Lukas Czerner | e1091b1 | 2013-04-11 23:37:19 -0400 | [diff] [blame] | 2497 | int ret; |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 2498 | |
Lukas Czerner | e1091b1 | 2013-04-11 23:37:19 -0400 | [diff] [blame] | 2499 | ret = kstrtoul(skip_spaces(buf), 0, &t); |
| 2500 | if (ret) |
| 2501 | return ret; |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 2502 | |
Lukas Czerner | e1091b1 | 2013-04-11 23:37:19 -0400 | [diff] [blame] | 2503 | if (t && (!is_power_of_2(t) || t > 0x40000000)) |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 2504 | return -EINVAL; |
| 2505 | |
| 2506 | sbi->s_inode_readahead_blks = t; |
| 2507 | return count; |
| 2508 | } |
| 2509 | |
| 2510 | static ssize_t sbi_ui_show(struct ext4_attr *a, |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 2511 | struct ext4_sb_info *sbi, char *buf) |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 2512 | { |
Jan Kara | f2d50a6 | 2013-06-04 12:51:16 -0400 | [diff] [blame] | 2513 | unsigned int *ui = (unsigned int *) (((char *) sbi) + a->u.offset); |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 2514 | |
| 2515 | return snprintf(buf, PAGE_SIZE, "%u\n", *ui); |
| 2516 | } |
| 2517 | |
| 2518 | static ssize_t sbi_ui_store(struct ext4_attr *a, |
| 2519 | struct ext4_sb_info *sbi, |
| 2520 | const char *buf, size_t count) |
| 2521 | { |
Jan Kara | f2d50a6 | 2013-06-04 12:51:16 -0400 | [diff] [blame] | 2522 | unsigned int *ui = (unsigned int *) (((char *) sbi) + a->u.offset); |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 2523 | unsigned long t; |
Lukas Czerner | e1091b1 | 2013-04-11 23:37:19 -0400 | [diff] [blame] | 2524 | int ret; |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 2525 | |
Lukas Czerner | e1091b1 | 2013-04-11 23:37:19 -0400 | [diff] [blame] | 2526 | ret = kstrtoul(skip_spaces(buf), 0, &t); |
| 2527 | if (ret) |
| 2528 | return ret; |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 2529 | *ui = t; |
| 2530 | return count; |
| 2531 | } |
| 2532 | |
Lukas Czerner | 52c198c | 2014-09-11 11:18:13 -0400 | [diff] [blame] | 2533 | static ssize_t es_ui_show(struct ext4_attr *a, |
| 2534 | struct ext4_sb_info *sbi, char *buf) |
| 2535 | { |
| 2536 | |
| 2537 | unsigned int *ui = (unsigned int *) (((char *) sbi->s_es) + |
| 2538 | a->u.offset); |
| 2539 | |
| 2540 | return snprintf(buf, PAGE_SIZE, "%u\n", *ui); |
| 2541 | } |
| 2542 | |
Lukas Czerner | 27dd438 | 2013-04-09 22:11:22 -0400 | [diff] [blame] | 2543 | static ssize_t reserved_clusters_show(struct ext4_attr *a, |
| 2544 | struct ext4_sb_info *sbi, char *buf) |
| 2545 | { |
| 2546 | return snprintf(buf, PAGE_SIZE, "%llu\n", |
| 2547 | (unsigned long long) atomic64_read(&sbi->s_resv_clusters)); |
| 2548 | } |
| 2549 | |
| 2550 | static ssize_t reserved_clusters_store(struct ext4_attr *a, |
| 2551 | struct ext4_sb_info *sbi, |
| 2552 | const char *buf, size_t count) |
| 2553 | { |
| 2554 | unsigned long long val; |
| 2555 | int ret; |
| 2556 | |
| 2557 | if (parse_strtoull(buf, -1ULL, &val)) |
| 2558 | return -EINVAL; |
| 2559 | ret = ext4_reserve_clusters(sbi, val); |
| 2560 | |
| 2561 | return ret ? ret : count; |
| 2562 | } |
| 2563 | |
Theodore Ts'o | 2c0544b | 2012-05-30 22:56:46 -0400 | [diff] [blame] | 2564 | static ssize_t trigger_test_error(struct ext4_attr *a, |
| 2565 | struct ext4_sb_info *sbi, |
| 2566 | const char *buf, size_t count) |
| 2567 | { |
| 2568 | int len = count; |
| 2569 | |
| 2570 | if (!capable(CAP_SYS_ADMIN)) |
| 2571 | return -EPERM; |
| 2572 | |
| 2573 | if (len && buf[len-1] == '\n') |
| 2574 | len--; |
| 2575 | |
| 2576 | if (len) |
| 2577 | ext4_error(sbi->s_sb, "%.*s", len, buf); |
| 2578 | return count; |
| 2579 | } |
| 2580 | |
Jan Kara | f2d50a6 | 2013-06-04 12:51:16 -0400 | [diff] [blame] | 2581 | static ssize_t sbi_deprecated_show(struct ext4_attr *a, |
| 2582 | struct ext4_sb_info *sbi, char *buf) |
| 2583 | { |
| 2584 | return snprintf(buf, PAGE_SIZE, "%d\n", a->u.deprecated_val); |
| 2585 | } |
| 2586 | |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 2587 | #define EXT4_ATTR_OFFSET(_name,_mode,_show,_store,_elname) \ |
| 2588 | static struct ext4_attr ext4_attr_##_name = { \ |
| 2589 | .attr = {.name = __stringify(_name), .mode = _mode }, \ |
| 2590 | .show = _show, \ |
| 2591 | .store = _store, \ |
Jan Kara | f2d50a6 | 2013-06-04 12:51:16 -0400 | [diff] [blame] | 2592 | .u = { \ |
| 2593 | .offset = offsetof(struct ext4_sb_info, _elname),\ |
| 2594 | }, \ |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 2595 | } |
Lukas Czerner | 52c198c | 2014-09-11 11:18:13 -0400 | [diff] [blame] | 2596 | |
| 2597 | #define EXT4_ATTR_OFFSET_ES(_name,_mode,_show,_store,_elname) \ |
| 2598 | static struct ext4_attr ext4_attr_##_name = { \ |
| 2599 | .attr = {.name = __stringify(_name), .mode = _mode }, \ |
| 2600 | .show = _show, \ |
| 2601 | .store = _store, \ |
| 2602 | .u = { \ |
| 2603 | .offset = offsetof(struct ext4_super_block, _elname), \ |
| 2604 | }, \ |
| 2605 | } |
| 2606 | |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 2607 | #define EXT4_ATTR(name, mode, show, store) \ |
| 2608 | static struct ext4_attr ext4_attr_##name = __ATTR(name, mode, show, store) |
| 2609 | |
Lukas Czerner | 857ac88 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2610 | #define EXT4_INFO_ATTR(name) EXT4_ATTR(name, 0444, NULL, NULL) |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 2611 | #define EXT4_RO_ATTR(name) EXT4_ATTR(name, 0444, name##_show, NULL) |
| 2612 | #define EXT4_RW_ATTR(name) EXT4_ATTR(name, 0644, name##_show, name##_store) |
Lukas Czerner | 52c198c | 2014-09-11 11:18:13 -0400 | [diff] [blame] | 2613 | |
| 2614 | #define EXT4_RO_ATTR_ES_UI(name, elname) \ |
| 2615 | EXT4_ATTR_OFFSET_ES(name, 0444, es_ui_show, NULL, elname) |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 2616 | #define EXT4_RW_ATTR_SBI_UI(name, elname) \ |
| 2617 | EXT4_ATTR_OFFSET(name, 0644, sbi_ui_show, sbi_ui_store, elname) |
Lukas Czerner | 52c198c | 2014-09-11 11:18:13 -0400 | [diff] [blame] | 2618 | |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 2619 | #define ATTR_LIST(name) &ext4_attr_##name.attr |
Jan Kara | f2d50a6 | 2013-06-04 12:51:16 -0400 | [diff] [blame] | 2620 | #define EXT4_DEPRECATED_ATTR(_name, _val) \ |
| 2621 | static struct ext4_attr ext4_attr_##_name = { \ |
| 2622 | .attr = {.name = __stringify(_name), .mode = 0444 }, \ |
| 2623 | .show = sbi_deprecated_show, \ |
| 2624 | .u = { \ |
| 2625 | .deprecated_val = _val, \ |
| 2626 | }, \ |
| 2627 | } |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 2628 | |
| 2629 | EXT4_RO_ATTR(delayed_allocation_blocks); |
| 2630 | EXT4_RO_ATTR(session_write_kbytes); |
| 2631 | EXT4_RO_ATTR(lifetime_write_kbytes); |
Lukas Czerner | 27dd438 | 2013-04-09 22:11:22 -0400 | [diff] [blame] | 2632 | EXT4_RW_ATTR(reserved_clusters); |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 2633 | EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, sbi_ui_show, |
| 2634 | inode_readahead_blks_store, s_inode_readahead_blks); |
Andreas Dilger | 1101391 | 2009-06-13 11:45:35 -0400 | [diff] [blame] | 2635 | EXT4_RW_ATTR_SBI_UI(inode_goal, s_inode_goal); |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 2636 | EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats); |
| 2637 | EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan); |
| 2638 | EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan); |
| 2639 | EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs); |
| 2640 | EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request); |
| 2641 | EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc); |
Jan Kara | f2d50a6 | 2013-06-04 12:51:16 -0400 | [diff] [blame] | 2642 | EXT4_DEPRECATED_ATTR(max_writeback_mb_bump, 128); |
Zheng Liu | 67a5da5 | 2012-08-17 09:54:17 -0400 | [diff] [blame] | 2643 | EXT4_RW_ATTR_SBI_UI(extent_max_zeroout_kb, s_extent_max_zeroout_kb); |
Theodore Ts'o | 2c0544b | 2012-05-30 22:56:46 -0400 | [diff] [blame] | 2644 | EXT4_ATTR(trigger_fs_error, 0200, NULL, trigger_test_error); |
Theodore Ts'o | efbed4d | 2013-10-17 21:11:01 -0400 | [diff] [blame] | 2645 | EXT4_RW_ATTR_SBI_UI(err_ratelimit_interval_ms, s_err_ratelimit_state.interval); |
| 2646 | EXT4_RW_ATTR_SBI_UI(err_ratelimit_burst, s_err_ratelimit_state.burst); |
| 2647 | EXT4_RW_ATTR_SBI_UI(warning_ratelimit_interval_ms, s_warning_ratelimit_state.interval); |
| 2648 | EXT4_RW_ATTR_SBI_UI(warning_ratelimit_burst, s_warning_ratelimit_state.burst); |
| 2649 | EXT4_RW_ATTR_SBI_UI(msg_ratelimit_interval_ms, s_msg_ratelimit_state.interval); |
| 2650 | EXT4_RW_ATTR_SBI_UI(msg_ratelimit_burst, s_msg_ratelimit_state.burst); |
Lukas Czerner | 52c198c | 2014-09-11 11:18:13 -0400 | [diff] [blame] | 2651 | EXT4_RO_ATTR_ES_UI(errors_count, s_error_count); |
| 2652 | EXT4_RO_ATTR_ES_UI(first_error_time, s_first_error_time); |
| 2653 | EXT4_RO_ATTR_ES_UI(last_error_time, s_last_error_time); |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 2654 | |
| 2655 | static struct attribute *ext4_attrs[] = { |
| 2656 | ATTR_LIST(delayed_allocation_blocks), |
| 2657 | ATTR_LIST(session_write_kbytes), |
| 2658 | ATTR_LIST(lifetime_write_kbytes), |
Lukas Czerner | 27dd438 | 2013-04-09 22:11:22 -0400 | [diff] [blame] | 2659 | ATTR_LIST(reserved_clusters), |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 2660 | ATTR_LIST(inode_readahead_blks), |
Andreas Dilger | 1101391 | 2009-06-13 11:45:35 -0400 | [diff] [blame] | 2661 | ATTR_LIST(inode_goal), |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 2662 | ATTR_LIST(mb_stats), |
| 2663 | ATTR_LIST(mb_max_to_scan), |
| 2664 | ATTR_LIST(mb_min_to_scan), |
| 2665 | ATTR_LIST(mb_order2_req), |
| 2666 | ATTR_LIST(mb_stream_req), |
| 2667 | ATTR_LIST(mb_group_prealloc), |
Theodore Ts'o | 55138e0 | 2009-09-29 13:31:31 -0400 | [diff] [blame] | 2668 | ATTR_LIST(max_writeback_mb_bump), |
Zheng Liu | 67a5da5 | 2012-08-17 09:54:17 -0400 | [diff] [blame] | 2669 | ATTR_LIST(extent_max_zeroout_kb), |
Theodore Ts'o | 2c0544b | 2012-05-30 22:56:46 -0400 | [diff] [blame] | 2670 | ATTR_LIST(trigger_fs_error), |
Theodore Ts'o | efbed4d | 2013-10-17 21:11:01 -0400 | [diff] [blame] | 2671 | ATTR_LIST(err_ratelimit_interval_ms), |
| 2672 | ATTR_LIST(err_ratelimit_burst), |
| 2673 | ATTR_LIST(warning_ratelimit_interval_ms), |
| 2674 | ATTR_LIST(warning_ratelimit_burst), |
| 2675 | ATTR_LIST(msg_ratelimit_interval_ms), |
| 2676 | ATTR_LIST(msg_ratelimit_burst), |
Lukas Czerner | 52c198c | 2014-09-11 11:18:13 -0400 | [diff] [blame] | 2677 | ATTR_LIST(errors_count), |
| 2678 | ATTR_LIST(first_error_time), |
| 2679 | ATTR_LIST(last_error_time), |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 2680 | NULL, |
| 2681 | }; |
| 2682 | |
Lukas Czerner | 857ac88 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2683 | /* Features this copy of ext4 supports */ |
| 2684 | EXT4_INFO_ATTR(lazy_itable_init); |
Lukas Czerner | 27ee40d | 2010-10-27 21:30:12 -0400 | [diff] [blame] | 2685 | EXT4_INFO_ATTR(batched_discard); |
Theodore Ts'o | 5e7bbef | 2012-09-13 12:11:40 -0400 | [diff] [blame] | 2686 | EXT4_INFO_ATTR(meta_bg_resize); |
Theodore Ts'o | 6ddb244 | 2015-04-16 01:56:00 -0400 | [diff] [blame] | 2687 | EXT4_INFO_ATTR(encryption); |
Lukas Czerner | 857ac88 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2688 | |
| 2689 | static struct attribute *ext4_feat_attrs[] = { |
| 2690 | ATTR_LIST(lazy_itable_init), |
Lukas Czerner | 27ee40d | 2010-10-27 21:30:12 -0400 | [diff] [blame] | 2691 | ATTR_LIST(batched_discard), |
Theodore Ts'o | 5e7bbef | 2012-09-13 12:11:40 -0400 | [diff] [blame] | 2692 | ATTR_LIST(meta_bg_resize), |
Theodore Ts'o | 6ddb244 | 2015-04-16 01:56:00 -0400 | [diff] [blame] | 2693 | ATTR_LIST(encryption), |
Lukas Czerner | 857ac88 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2694 | NULL, |
| 2695 | }; |
| 2696 | |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 2697 | static ssize_t ext4_attr_show(struct kobject *kobj, |
| 2698 | struct attribute *attr, char *buf) |
| 2699 | { |
| 2700 | struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, |
| 2701 | s_kobj); |
| 2702 | struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); |
| 2703 | |
| 2704 | return a->show ? a->show(a, sbi, buf) : 0; |
| 2705 | } |
| 2706 | |
| 2707 | static ssize_t ext4_attr_store(struct kobject *kobj, |
| 2708 | struct attribute *attr, |
| 2709 | const char *buf, size_t len) |
| 2710 | { |
| 2711 | struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, |
| 2712 | s_kobj); |
| 2713 | struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); |
| 2714 | |
| 2715 | return a->store ? a->store(a, sbi, buf, len) : 0; |
| 2716 | } |
| 2717 | |
| 2718 | static void ext4_sb_release(struct kobject *kobj) |
| 2719 | { |
| 2720 | struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, |
| 2721 | s_kobj); |
| 2722 | complete(&sbi->s_kobj_unregister); |
| 2723 | } |
| 2724 | |
Emese Revfy | 52cf25d | 2010-01-19 02:58:23 +0100 | [diff] [blame] | 2725 | static const struct sysfs_ops ext4_attr_ops = { |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 2726 | .show = ext4_attr_show, |
| 2727 | .store = ext4_attr_store, |
| 2728 | }; |
| 2729 | |
| 2730 | static struct kobj_type ext4_ktype = { |
| 2731 | .default_attrs = ext4_attrs, |
| 2732 | .sysfs_ops = &ext4_attr_ops, |
| 2733 | .release = ext4_sb_release, |
| 2734 | }; |
| 2735 | |
Lukas Czerner | 857ac88 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2736 | static void ext4_feat_release(struct kobject *kobj) |
| 2737 | { |
| 2738 | complete(&ext4_feat->f_kobj_unregister); |
| 2739 | } |
| 2740 | |
Lukas Czerner | c7f7254 | 2014-09-11 11:27:58 -0400 | [diff] [blame] | 2741 | static ssize_t ext4_feat_show(struct kobject *kobj, |
| 2742 | struct attribute *attr, char *buf) |
| 2743 | { |
| 2744 | return snprintf(buf, PAGE_SIZE, "supported\n"); |
| 2745 | } |
| 2746 | |
| 2747 | /* |
| 2748 | * We can not use ext4_attr_show/store because it relies on the kobject |
| 2749 | * being embedded in the ext4_sb_info structure which is definitely not |
| 2750 | * true in this case. |
| 2751 | */ |
| 2752 | static const struct sysfs_ops ext4_feat_ops = { |
| 2753 | .show = ext4_feat_show, |
| 2754 | .store = NULL, |
| 2755 | }; |
| 2756 | |
Lukas Czerner | 857ac88 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2757 | static struct kobj_type ext4_feat_ktype = { |
| 2758 | .default_attrs = ext4_feat_attrs, |
Lukas Czerner | c7f7254 | 2014-09-11 11:27:58 -0400 | [diff] [blame] | 2759 | .sysfs_ops = &ext4_feat_ops, |
Lukas Czerner | 857ac88 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2760 | .release = ext4_feat_release, |
| 2761 | }; |
| 2762 | |
Eric Sandeen | a13fb1a | 2009-08-18 00:20:23 -0400 | [diff] [blame] | 2763 | /* |
| 2764 | * Check whether this filesystem can be mounted based on |
| 2765 | * the features present and the RDONLY/RDWR mount requested. |
| 2766 | * Returns 1 if this filesystem can be mounted as requested, |
| 2767 | * 0 if it cannot be. |
| 2768 | */ |
| 2769 | static int ext4_feature_set_ok(struct super_block *sb, int readonly) |
| 2770 | { |
| 2771 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP)) { |
| 2772 | ext4_msg(sb, KERN_ERR, |
| 2773 | "Couldn't mount because of " |
| 2774 | "unsupported optional features (%x)", |
| 2775 | (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & |
| 2776 | ~EXT4_FEATURE_INCOMPAT_SUPP)); |
| 2777 | return 0; |
| 2778 | } |
| 2779 | |
| 2780 | if (readonly) |
| 2781 | return 1; |
| 2782 | |
Darrick J. Wong | 2cb5cc8 | 2015-02-12 22:31:21 -0500 | [diff] [blame] | 2783 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_READONLY)) { |
| 2784 | ext4_msg(sb, KERN_INFO, "filesystem is read-only"); |
| 2785 | sb->s_flags |= MS_RDONLY; |
| 2786 | return 1; |
| 2787 | } |
| 2788 | |
Eric Sandeen | a13fb1a | 2009-08-18 00:20:23 -0400 | [diff] [blame] | 2789 | /* Check that feature set is OK for a read-write mount */ |
| 2790 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP)) { |
| 2791 | ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " |
| 2792 | "unsupported optional features (%x)", |
| 2793 | (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & |
| 2794 | ~EXT4_FEATURE_RO_COMPAT_SUPP)); |
| 2795 | return 0; |
| 2796 | } |
| 2797 | /* |
| 2798 | * Large file size enabled file system can only be mounted |
| 2799 | * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF |
| 2800 | */ |
| 2801 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) { |
| 2802 | if (sizeof(blkcnt_t) < sizeof(u64)) { |
| 2803 | ext4_msg(sb, KERN_ERR, "Filesystem with huge files " |
| 2804 | "cannot be mounted RDWR without " |
| 2805 | "CONFIG_LBDAF"); |
| 2806 | return 0; |
| 2807 | } |
| 2808 | } |
Theodore Ts'o | bab08ab | 2011-09-09 18:36:51 -0400 | [diff] [blame] | 2809 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_BIGALLOC) && |
| 2810 | !EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_EXTENTS)) { |
| 2811 | ext4_msg(sb, KERN_ERR, |
| 2812 | "Can't support bigalloc feature without " |
| 2813 | "extents feature\n"); |
| 2814 | return 0; |
| 2815 | } |
Aditya Kali | 7c319d3 | 2012-07-22 20:21:31 -0400 | [diff] [blame] | 2816 | |
| 2817 | #ifndef CONFIG_QUOTA |
| 2818 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) && |
| 2819 | !readonly) { |
| 2820 | ext4_msg(sb, KERN_ERR, |
| 2821 | "Filesystem with quota feature cannot be mounted RDWR " |
| 2822 | "without CONFIG_QUOTA"); |
| 2823 | return 0; |
| 2824 | } |
| 2825 | #endif /* CONFIG_QUOTA */ |
Eric Sandeen | a13fb1a | 2009-08-18 00:20:23 -0400 | [diff] [blame] | 2826 | return 1; |
| 2827 | } |
| 2828 | |
Theodore Ts'o | 66e61a9 | 2010-07-27 11:56:04 -0400 | [diff] [blame] | 2829 | /* |
| 2830 | * This function is called once a day if we have errors logged |
| 2831 | * on the file system |
| 2832 | */ |
| 2833 | static void print_daily_error_info(unsigned long arg) |
| 2834 | { |
| 2835 | struct super_block *sb = (struct super_block *) arg; |
| 2836 | struct ext4_sb_info *sbi; |
| 2837 | struct ext4_super_block *es; |
| 2838 | |
| 2839 | sbi = EXT4_SB(sb); |
| 2840 | es = sbi->s_es; |
| 2841 | |
| 2842 | if (es->s_error_count) |
Theodore Ts'o | ae0f78d | 2014-07-05 18:40:52 -0400 | [diff] [blame] | 2843 | /* fsck newer than v1.41.13 is needed to clean this condition. */ |
| 2844 | ext4_msg(sb, KERN_NOTICE, "error count since last fsck: %u", |
Theodore Ts'o | 66e61a9 | 2010-07-27 11:56:04 -0400 | [diff] [blame] | 2845 | le32_to_cpu(es->s_error_count)); |
| 2846 | if (es->s_first_error_time) { |
Theodore Ts'o | ae0f78d | 2014-07-05 18:40:52 -0400 | [diff] [blame] | 2847 | printk(KERN_NOTICE "EXT4-fs (%s): initial error at time %u: %.*s:%d", |
Theodore Ts'o | 66e61a9 | 2010-07-27 11:56:04 -0400 | [diff] [blame] | 2848 | sb->s_id, le32_to_cpu(es->s_first_error_time), |
| 2849 | (int) sizeof(es->s_first_error_func), |
| 2850 | es->s_first_error_func, |
| 2851 | le32_to_cpu(es->s_first_error_line)); |
| 2852 | if (es->s_first_error_ino) |
| 2853 | printk(": inode %u", |
| 2854 | le32_to_cpu(es->s_first_error_ino)); |
| 2855 | if (es->s_first_error_block) |
| 2856 | printk(": block %llu", (unsigned long long) |
| 2857 | le64_to_cpu(es->s_first_error_block)); |
| 2858 | printk("\n"); |
| 2859 | } |
| 2860 | if (es->s_last_error_time) { |
Theodore Ts'o | ae0f78d | 2014-07-05 18:40:52 -0400 | [diff] [blame] | 2861 | printk(KERN_NOTICE "EXT4-fs (%s): last error at time %u: %.*s:%d", |
Theodore Ts'o | 66e61a9 | 2010-07-27 11:56:04 -0400 | [diff] [blame] | 2862 | sb->s_id, le32_to_cpu(es->s_last_error_time), |
| 2863 | (int) sizeof(es->s_last_error_func), |
| 2864 | es->s_last_error_func, |
| 2865 | le32_to_cpu(es->s_last_error_line)); |
| 2866 | if (es->s_last_error_ino) |
| 2867 | printk(": inode %u", |
| 2868 | le32_to_cpu(es->s_last_error_ino)); |
| 2869 | if (es->s_last_error_block) |
| 2870 | printk(": block %llu", (unsigned long long) |
| 2871 | le64_to_cpu(es->s_last_error_block)); |
| 2872 | printk("\n"); |
| 2873 | } |
| 2874 | mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ |
| 2875 | } |
| 2876 | |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2877 | /* Find next suitable group and run ext4_init_inode_table */ |
| 2878 | static int ext4_run_li_request(struct ext4_li_request *elr) |
| 2879 | { |
| 2880 | struct ext4_group_desc *gdp = NULL; |
| 2881 | ext4_group_t group, ngroups; |
| 2882 | struct super_block *sb; |
| 2883 | unsigned long timeout = 0; |
| 2884 | int ret = 0; |
| 2885 | |
| 2886 | sb = elr->lr_super; |
| 2887 | ngroups = EXT4_SB(sb)->s_groups_count; |
| 2888 | |
Jan Kara | 8e8ad8a | 2012-06-12 16:20:38 +0200 | [diff] [blame] | 2889 | sb_start_write(sb); |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2890 | for (group = elr->lr_next_group; group < ngroups; group++) { |
| 2891 | gdp = ext4_get_group_desc(sb, group, NULL); |
| 2892 | if (!gdp) { |
| 2893 | ret = 1; |
| 2894 | break; |
| 2895 | } |
| 2896 | |
| 2897 | if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) |
| 2898 | break; |
| 2899 | } |
| 2900 | |
Theodore Ts'o | 7f51186 | 2013-01-13 08:41:45 -0500 | [diff] [blame] | 2901 | if (group >= ngroups) |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2902 | ret = 1; |
| 2903 | |
| 2904 | if (!ret) { |
| 2905 | timeout = jiffies; |
| 2906 | ret = ext4_init_inode_table(sb, group, |
| 2907 | elr->lr_timeout ? 0 : 1); |
| 2908 | if (elr->lr_timeout == 0) { |
Lukas Czerner | 51ce651 | 2011-05-20 13:55:16 -0400 | [diff] [blame] | 2909 | timeout = (jiffies - timeout) * |
| 2910 | elr->lr_sbi->s_li_wait_mult; |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2911 | elr->lr_timeout = timeout; |
| 2912 | } |
| 2913 | elr->lr_next_sched = jiffies + elr->lr_timeout; |
| 2914 | elr->lr_next_group = group + 1; |
| 2915 | } |
Jan Kara | 8e8ad8a | 2012-06-12 16:20:38 +0200 | [diff] [blame] | 2916 | sb_end_write(sb); |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2917 | |
| 2918 | return ret; |
| 2919 | } |
| 2920 | |
| 2921 | /* |
| 2922 | * Remove lr_request from the list_request and free the |
Lukas Czerner | 4ed5c03 | 2011-05-20 13:49:04 -0400 | [diff] [blame] | 2923 | * request structure. Should be called with li_list_mtx held |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2924 | */ |
| 2925 | static void ext4_remove_li_request(struct ext4_li_request *elr) |
| 2926 | { |
| 2927 | struct ext4_sb_info *sbi; |
| 2928 | |
| 2929 | if (!elr) |
| 2930 | return; |
| 2931 | |
| 2932 | sbi = elr->lr_sbi; |
| 2933 | |
| 2934 | list_del(&elr->lr_request); |
| 2935 | sbi->s_li_request = NULL; |
| 2936 | kfree(elr); |
| 2937 | } |
| 2938 | |
| 2939 | static void ext4_unregister_li_request(struct super_block *sb) |
| 2940 | { |
Lukas Czerner | 1bb933f | 2011-05-20 13:55:29 -0400 | [diff] [blame] | 2941 | mutex_lock(&ext4_li_mtx); |
| 2942 | if (!ext4_li_info) { |
| 2943 | mutex_unlock(&ext4_li_mtx); |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2944 | return; |
Lukas Czerner | 1bb933f | 2011-05-20 13:55:29 -0400 | [diff] [blame] | 2945 | } |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2946 | |
| 2947 | mutex_lock(&ext4_li_info->li_list_mtx); |
Lukas Czerner | 1bb933f | 2011-05-20 13:55:29 -0400 | [diff] [blame] | 2948 | ext4_remove_li_request(EXT4_SB(sb)->s_li_request); |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2949 | mutex_unlock(&ext4_li_info->li_list_mtx); |
Lukas Czerner | 1bb933f | 2011-05-20 13:55:29 -0400 | [diff] [blame] | 2950 | mutex_unlock(&ext4_li_mtx); |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2951 | } |
| 2952 | |
Eric Sandeen | 8f1f745 | 2011-02-03 14:33:15 -0500 | [diff] [blame] | 2953 | static struct task_struct *ext4_lazyinit_task; |
| 2954 | |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2955 | /* |
| 2956 | * This is the function where ext4lazyinit thread lives. It walks |
| 2957 | * through the request list searching for next scheduled filesystem. |
| 2958 | * When such a fs is found, run the lazy initialization request |
| 2959 | * (ext4_rn_li_request) and keep track of the time spend in this |
| 2960 | * function. Based on that time we compute next schedule time of |
| 2961 | * the request. When walking through the list is complete, compute |
| 2962 | * next waking time and put itself into sleep. |
| 2963 | */ |
| 2964 | static int ext4_lazyinit_thread(void *arg) |
| 2965 | { |
| 2966 | struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; |
| 2967 | struct list_head *pos, *n; |
| 2968 | struct ext4_li_request *elr; |
Lukas Czerner | 4ed5c03 | 2011-05-20 13:49:04 -0400 | [diff] [blame] | 2969 | unsigned long next_wakeup, cur; |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2970 | |
| 2971 | BUG_ON(NULL == eli); |
| 2972 | |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2973 | cont_thread: |
| 2974 | while (true) { |
| 2975 | next_wakeup = MAX_JIFFY_OFFSET; |
| 2976 | |
| 2977 | mutex_lock(&eli->li_list_mtx); |
| 2978 | if (list_empty(&eli->li_request_list)) { |
| 2979 | mutex_unlock(&eli->li_list_mtx); |
| 2980 | goto exit_thread; |
| 2981 | } |
| 2982 | |
| 2983 | list_for_each_safe(pos, n, &eli->li_request_list) { |
| 2984 | elr = list_entry(pos, struct ext4_li_request, |
| 2985 | lr_request); |
| 2986 | |
Theodore Ts'o | b2c78cd | 2010-11-02 14:19:30 -0400 | [diff] [blame] | 2987 | if (time_after_eq(jiffies, elr->lr_next_sched)) { |
| 2988 | if (ext4_run_li_request(elr) != 0) { |
| 2989 | /* error, remove the lazy_init job */ |
| 2990 | ext4_remove_li_request(elr); |
| 2991 | continue; |
| 2992 | } |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2993 | } |
| 2994 | |
| 2995 | if (time_before(elr->lr_next_sched, next_wakeup)) |
| 2996 | next_wakeup = elr->lr_next_sched; |
| 2997 | } |
| 2998 | mutex_unlock(&eli->li_list_mtx); |
| 2999 | |
Tejun Heo | a0acae0 | 2011-11-21 12:32:22 -0800 | [diff] [blame] | 3000 | try_to_freeze(); |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 3001 | |
Lukas Czerner | 4ed5c03 | 2011-05-20 13:49:04 -0400 | [diff] [blame] | 3002 | cur = jiffies; |
| 3003 | if ((time_after_eq(cur, next_wakeup)) || |
Lukas Czerner | f4245bd | 2010-11-02 14:07:17 -0400 | [diff] [blame] | 3004 | (MAX_JIFFY_OFFSET == next_wakeup)) { |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 3005 | cond_resched(); |
| 3006 | continue; |
| 3007 | } |
| 3008 | |
Lukas Czerner | 4ed5c03 | 2011-05-20 13:49:04 -0400 | [diff] [blame] | 3009 | schedule_timeout_interruptible(next_wakeup - cur); |
| 3010 | |
Eric Sandeen | 8f1f745 | 2011-02-03 14:33:15 -0500 | [diff] [blame] | 3011 | if (kthread_should_stop()) { |
| 3012 | ext4_clear_request_list(); |
| 3013 | goto exit_thread; |
| 3014 | } |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 3015 | } |
| 3016 | |
| 3017 | exit_thread: |
| 3018 | /* |
| 3019 | * It looks like the request list is empty, but we need |
| 3020 | * to check it under the li_list_mtx lock, to prevent any |
| 3021 | * additions into it, and of course we should lock ext4_li_mtx |
| 3022 | * to atomically free the list and ext4_li_info, because at |
| 3023 | * this point another ext4 filesystem could be registering |
| 3024 | * new one. |
| 3025 | */ |
| 3026 | mutex_lock(&ext4_li_mtx); |
| 3027 | mutex_lock(&eli->li_list_mtx); |
| 3028 | if (!list_empty(&eli->li_request_list)) { |
| 3029 | mutex_unlock(&eli->li_list_mtx); |
| 3030 | mutex_unlock(&ext4_li_mtx); |
| 3031 | goto cont_thread; |
| 3032 | } |
| 3033 | mutex_unlock(&eli->li_list_mtx); |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 3034 | kfree(ext4_li_info); |
| 3035 | ext4_li_info = NULL; |
| 3036 | mutex_unlock(&ext4_li_mtx); |
| 3037 | |
| 3038 | return 0; |
| 3039 | } |
| 3040 | |
| 3041 | static void ext4_clear_request_list(void) |
| 3042 | { |
| 3043 | struct list_head *pos, *n; |
| 3044 | struct ext4_li_request *elr; |
| 3045 | |
| 3046 | mutex_lock(&ext4_li_info->li_list_mtx); |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 3047 | list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { |
| 3048 | elr = list_entry(pos, struct ext4_li_request, |
| 3049 | lr_request); |
| 3050 | ext4_remove_li_request(elr); |
| 3051 | } |
| 3052 | mutex_unlock(&ext4_li_info->li_list_mtx); |
| 3053 | } |
| 3054 | |
| 3055 | static int ext4_run_lazyinit_thread(void) |
| 3056 | { |
Eric Sandeen | 8f1f745 | 2011-02-03 14:33:15 -0500 | [diff] [blame] | 3057 | ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, |
| 3058 | ext4_li_info, "ext4lazyinit"); |
| 3059 | if (IS_ERR(ext4_lazyinit_task)) { |
| 3060 | int err = PTR_ERR(ext4_lazyinit_task); |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 3061 | ext4_clear_request_list(); |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 3062 | kfree(ext4_li_info); |
| 3063 | ext4_li_info = NULL; |
Theodore Ts'o | 92b9781 | 2012-03-19 23:41:49 -0400 | [diff] [blame] | 3064 | printk(KERN_CRIT "EXT4-fs: error %d creating inode table " |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 3065 | "initialization thread\n", |
| 3066 | err); |
| 3067 | return err; |
| 3068 | } |
| 3069 | ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 3070 | return 0; |
| 3071 | } |
| 3072 | |
| 3073 | /* |
| 3074 | * Check whether it make sense to run itable init. thread or not. |
| 3075 | * If there is at least one uninitialized inode table, return |
| 3076 | * corresponding group number, else the loop goes through all |
| 3077 | * groups and return total number of groups. |
| 3078 | */ |
| 3079 | static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) |
| 3080 | { |
| 3081 | ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; |
| 3082 | struct ext4_group_desc *gdp = NULL; |
| 3083 | |
| 3084 | for (group = 0; group < ngroups; group++) { |
| 3085 | gdp = ext4_get_group_desc(sb, group, NULL); |
| 3086 | if (!gdp) |
| 3087 | continue; |
| 3088 | |
| 3089 | if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) |
| 3090 | break; |
| 3091 | } |
| 3092 | |
| 3093 | return group; |
| 3094 | } |
| 3095 | |
| 3096 | static int ext4_li_info_new(void) |
| 3097 | { |
| 3098 | struct ext4_lazy_init *eli = NULL; |
| 3099 | |
| 3100 | eli = kzalloc(sizeof(*eli), GFP_KERNEL); |
| 3101 | if (!eli) |
| 3102 | return -ENOMEM; |
| 3103 | |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 3104 | INIT_LIST_HEAD(&eli->li_request_list); |
| 3105 | mutex_init(&eli->li_list_mtx); |
| 3106 | |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 3107 | eli->li_state |= EXT4_LAZYINIT_QUIT; |
| 3108 | |
| 3109 | ext4_li_info = eli; |
| 3110 | |
| 3111 | return 0; |
| 3112 | } |
| 3113 | |
| 3114 | static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, |
| 3115 | ext4_group_t start) |
| 3116 | { |
| 3117 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
| 3118 | struct ext4_li_request *elr; |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 3119 | |
| 3120 | elr = kzalloc(sizeof(*elr), GFP_KERNEL); |
| 3121 | if (!elr) |
| 3122 | return NULL; |
| 3123 | |
| 3124 | elr->lr_super = sb; |
| 3125 | elr->lr_sbi = sbi; |
| 3126 | elr->lr_next_group = start; |
| 3127 | |
| 3128 | /* |
| 3129 | * Randomize first schedule time of the request to |
| 3130 | * spread the inode table initialization requests |
| 3131 | * better. |
| 3132 | */ |
Theodore Ts'o | dd1f723 | 2013-11-08 00:14:53 -0500 | [diff] [blame] | 3133 | elr->lr_next_sched = jiffies + (prandom_u32() % |
| 3134 | (EXT4_DEF_LI_MAX_START_DELAY * HZ)); |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 3135 | return elr; |
| 3136 | } |
| 3137 | |
Theodore Ts'o | 7f51186 | 2013-01-13 08:41:45 -0500 | [diff] [blame] | 3138 | int ext4_register_li_request(struct super_block *sb, |
| 3139 | ext4_group_t first_not_zeroed) |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 3140 | { |
| 3141 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
Theodore Ts'o | 7f51186 | 2013-01-13 08:41:45 -0500 | [diff] [blame] | 3142 | struct ext4_li_request *elr = NULL; |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 3143 | ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; |
Andrew Morton | 6c5a6cb | 2011-01-10 12:30:17 -0500 | [diff] [blame] | 3144 | int ret = 0; |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 3145 | |
Theodore Ts'o | 7f51186 | 2013-01-13 08:41:45 -0500 | [diff] [blame] | 3146 | mutex_lock(&ext4_li_mtx); |
Lukas Czerner | 51ce651 | 2011-05-20 13:55:16 -0400 | [diff] [blame] | 3147 | if (sbi->s_li_request != NULL) { |
| 3148 | /* |
| 3149 | * Reset timeout so it can be computed again, because |
| 3150 | * s_li_wait_mult might have changed. |
| 3151 | */ |
| 3152 | sbi->s_li_request->lr_timeout = 0; |
Theodore Ts'o | 7f51186 | 2013-01-13 08:41:45 -0500 | [diff] [blame] | 3153 | goto out; |
Lukas Czerner | 51ce651 | 2011-05-20 13:55:16 -0400 | [diff] [blame] | 3154 | } |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 3155 | |
| 3156 | if (first_not_zeroed == ngroups || |
| 3157 | (sb->s_flags & MS_RDONLY) || |
Tao Ma | 55ff384 | 2011-05-09 10:28:41 -0400 | [diff] [blame] | 3158 | !test_opt(sb, INIT_INODE_TABLE)) |
Theodore Ts'o | 7f51186 | 2013-01-13 08:41:45 -0500 | [diff] [blame] | 3159 | goto out; |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 3160 | |
| 3161 | elr = ext4_li_request_new(sb, first_not_zeroed); |
Theodore Ts'o | 7f51186 | 2013-01-13 08:41:45 -0500 | [diff] [blame] | 3162 | if (!elr) { |
| 3163 | ret = -ENOMEM; |
| 3164 | goto out; |
| 3165 | } |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 3166 | |
| 3167 | if (NULL == ext4_li_info) { |
| 3168 | ret = ext4_li_info_new(); |
| 3169 | if (ret) |
| 3170 | goto out; |
| 3171 | } |
| 3172 | |
| 3173 | mutex_lock(&ext4_li_info->li_list_mtx); |
| 3174 | list_add(&elr->lr_request, &ext4_li_info->li_request_list); |
| 3175 | mutex_unlock(&ext4_li_info->li_list_mtx); |
| 3176 | |
| 3177 | sbi->s_li_request = elr; |
Tao Ma | 46e4690 | 2011-04-04 16:00:49 -0400 | [diff] [blame] | 3178 | /* |
| 3179 | * set elr to NULL here since it has been inserted to |
| 3180 | * the request_list and the removal and free of it is |
| 3181 | * handled by ext4_clear_request_list from now on. |
| 3182 | */ |
| 3183 | elr = NULL; |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 3184 | |
| 3185 | if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { |
| 3186 | ret = ext4_run_lazyinit_thread(); |
| 3187 | if (ret) |
| 3188 | goto out; |
| 3189 | } |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 3190 | out: |
Nicolas Kaiser | beed5ecb | 2010-10-27 22:08:42 -0400 | [diff] [blame] | 3191 | mutex_unlock(&ext4_li_mtx); |
| 3192 | if (ret) |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 3193 | kfree(elr); |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 3194 | return ret; |
| 3195 | } |
| 3196 | |
| 3197 | /* |
| 3198 | * We do not need to lock anything since this is called on |
| 3199 | * module unload. |
| 3200 | */ |
| 3201 | static void ext4_destroy_lazyinit_thread(void) |
| 3202 | { |
| 3203 | /* |
| 3204 | * If thread exited earlier |
| 3205 | * there's nothing to be done. |
| 3206 | */ |
Eric Sandeen | 8f1f745 | 2011-02-03 14:33:15 -0500 | [diff] [blame] | 3207 | if (!ext4_li_info || !ext4_lazyinit_task) |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 3208 | return; |
| 3209 | |
Eric Sandeen | 8f1f745 | 2011-02-03 14:33:15 -0500 | [diff] [blame] | 3210 | kthread_stop(ext4_lazyinit_task); |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 3211 | } |
| 3212 | |
Darrick J. Wong | 25ed6e8 | 2012-05-27 07:48:56 -0400 | [diff] [blame] | 3213 | static int set_journal_csum_feature_set(struct super_block *sb) |
| 3214 | { |
| 3215 | int ret = 1; |
| 3216 | int compat, incompat; |
| 3217 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
| 3218 | |
Dmitry Monakhov | 9aa5d32 | 2014-10-13 03:36:16 -0400 | [diff] [blame] | 3219 | if (ext4_has_metadata_csum(sb)) { |
Darrick J. Wong | db9ee22 | 2014-08-27 18:40:07 -0400 | [diff] [blame] | 3220 | /* journal checksum v3 */ |
Darrick J. Wong | 25ed6e8 | 2012-05-27 07:48:56 -0400 | [diff] [blame] | 3221 | compat = 0; |
Darrick J. Wong | db9ee22 | 2014-08-27 18:40:07 -0400 | [diff] [blame] | 3222 | incompat = JBD2_FEATURE_INCOMPAT_CSUM_V3; |
Darrick J. Wong | 25ed6e8 | 2012-05-27 07:48:56 -0400 | [diff] [blame] | 3223 | } else { |
| 3224 | /* journal checksum v1 */ |
| 3225 | compat = JBD2_FEATURE_COMPAT_CHECKSUM; |
| 3226 | incompat = 0; |
| 3227 | } |
| 3228 | |
Darrick J. Wong | feb8c6d | 2014-09-11 11:38:21 -0400 | [diff] [blame] | 3229 | jbd2_journal_clear_features(sbi->s_journal, |
| 3230 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, |
| 3231 | JBD2_FEATURE_INCOMPAT_CSUM_V3 | |
| 3232 | JBD2_FEATURE_INCOMPAT_CSUM_V2); |
Darrick J. Wong | 25ed6e8 | 2012-05-27 07:48:56 -0400 | [diff] [blame] | 3233 | if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { |
| 3234 | ret = jbd2_journal_set_features(sbi->s_journal, |
| 3235 | compat, 0, |
| 3236 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | |
| 3237 | incompat); |
| 3238 | } else if (test_opt(sb, JOURNAL_CHECKSUM)) { |
| 3239 | ret = jbd2_journal_set_features(sbi->s_journal, |
| 3240 | compat, 0, |
| 3241 | incompat); |
| 3242 | jbd2_journal_clear_features(sbi->s_journal, 0, 0, |
| 3243 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); |
| 3244 | } else { |
Darrick J. Wong | feb8c6d | 2014-09-11 11:38:21 -0400 | [diff] [blame] | 3245 | jbd2_journal_clear_features(sbi->s_journal, 0, 0, |
| 3246 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); |
Darrick J. Wong | 25ed6e8 | 2012-05-27 07:48:56 -0400 | [diff] [blame] | 3247 | } |
| 3248 | |
| 3249 | return ret; |
| 3250 | } |
| 3251 | |
Theodore Ts'o | 952fc18 | 2012-07-09 16:27:05 -0400 | [diff] [blame] | 3252 | /* |
| 3253 | * Note: calculating the overhead so we can be compatible with |
| 3254 | * historical BSD practice is quite difficult in the face of |
| 3255 | * clusters/bigalloc. This is because multiple metadata blocks from |
| 3256 | * different block group can end up in the same allocation cluster. |
| 3257 | * Calculating the exact overhead in the face of clustered allocation |
| 3258 | * requires either O(all block bitmaps) in memory or O(number of block |
| 3259 | * groups**2) in time. We will still calculate the superblock for |
| 3260 | * older file systems --- and if we come across with a bigalloc file |
| 3261 | * system with zero in s_overhead_clusters the estimate will be close to |
| 3262 | * correct especially for very large cluster sizes --- but for newer |
| 3263 | * file systems, it's better to calculate this figure once at mkfs |
| 3264 | * time, and store it in the superblock. If the superblock value is |
| 3265 | * present (even for non-bigalloc file systems), we will use it. |
| 3266 | */ |
| 3267 | static int count_overhead(struct super_block *sb, ext4_group_t grp, |
| 3268 | char *buf) |
| 3269 | { |
| 3270 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
| 3271 | struct ext4_group_desc *gdp; |
| 3272 | ext4_fsblk_t first_block, last_block, b; |
| 3273 | ext4_group_t i, ngroups = ext4_get_groups_count(sb); |
| 3274 | int s, j, count = 0; |
| 3275 | |
Theodore Ts'o | 0548bbb | 2012-08-16 11:59:04 -0400 | [diff] [blame] | 3276 | if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_BIGALLOC)) |
| 3277 | return (ext4_bg_has_super(sb, grp) + ext4_bg_num_gdb(sb, grp) + |
| 3278 | sbi->s_itb_per_group + 2); |
| 3279 | |
Theodore Ts'o | 952fc18 | 2012-07-09 16:27:05 -0400 | [diff] [blame] | 3280 | first_block = le32_to_cpu(sbi->s_es->s_first_data_block) + |
| 3281 | (grp * EXT4_BLOCKS_PER_GROUP(sb)); |
| 3282 | last_block = first_block + EXT4_BLOCKS_PER_GROUP(sb) - 1; |
| 3283 | for (i = 0; i < ngroups; i++) { |
| 3284 | gdp = ext4_get_group_desc(sb, i, NULL); |
| 3285 | b = ext4_block_bitmap(sb, gdp); |
| 3286 | if (b >= first_block && b <= last_block) { |
| 3287 | ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); |
| 3288 | count++; |
| 3289 | } |
| 3290 | b = ext4_inode_bitmap(sb, gdp); |
| 3291 | if (b >= first_block && b <= last_block) { |
| 3292 | ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); |
| 3293 | count++; |
| 3294 | } |
| 3295 | b = ext4_inode_table(sb, gdp); |
| 3296 | if (b >= first_block && b + sbi->s_itb_per_group <= last_block) |
| 3297 | for (j = 0; j < sbi->s_itb_per_group; j++, b++) { |
| 3298 | int c = EXT4_B2C(sbi, b - first_block); |
| 3299 | ext4_set_bit(c, buf); |
| 3300 | count++; |
| 3301 | } |
| 3302 | if (i != grp) |
| 3303 | continue; |
| 3304 | s = 0; |
| 3305 | if (ext4_bg_has_super(sb, grp)) { |
| 3306 | ext4_set_bit(s++, buf); |
| 3307 | count++; |
| 3308 | } |
| 3309 | for (j = ext4_bg_num_gdb(sb, grp); j > 0; j--) { |
| 3310 | ext4_set_bit(EXT4_B2C(sbi, s++), buf); |
| 3311 | count++; |
| 3312 | } |
| 3313 | } |
| 3314 | if (!count) |
| 3315 | return 0; |
| 3316 | return EXT4_CLUSTERS_PER_GROUP(sb) - |
| 3317 | ext4_count_free(buf, EXT4_CLUSTERS_PER_GROUP(sb) / 8); |
| 3318 | } |
| 3319 | |
| 3320 | /* |
| 3321 | * Compute the overhead and stash it in sbi->s_overhead |
| 3322 | */ |
| 3323 | int ext4_calculate_overhead(struct super_block *sb) |
| 3324 | { |
| 3325 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
| 3326 | struct ext4_super_block *es = sbi->s_es; |
| 3327 | ext4_group_t i, ngroups = ext4_get_groups_count(sb); |
| 3328 | ext4_fsblk_t overhead = 0; |
Dmitry Monakhov | 4fdb554 | 2014-11-25 13:08:04 -0500 | [diff] [blame] | 3329 | char *buf = (char *) get_zeroed_page(GFP_NOFS); |
Theodore Ts'o | 952fc18 | 2012-07-09 16:27:05 -0400 | [diff] [blame] | 3330 | |
Theodore Ts'o | 952fc18 | 2012-07-09 16:27:05 -0400 | [diff] [blame] | 3331 | if (!buf) |
| 3332 | return -ENOMEM; |
| 3333 | |
| 3334 | /* |
| 3335 | * Compute the overhead (FS structures). This is constant |
| 3336 | * for a given filesystem unless the number of block groups |
| 3337 | * changes so we cache the previous value until it does. |
| 3338 | */ |
| 3339 | |
| 3340 | /* |
| 3341 | * All of the blocks before first_data_block are overhead |
| 3342 | */ |
| 3343 | overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block)); |
| 3344 | |
| 3345 | /* |
| 3346 | * Add the overhead found in each block group |
| 3347 | */ |
| 3348 | for (i = 0; i < ngroups; i++) { |
| 3349 | int blks; |
| 3350 | |
| 3351 | blks = count_overhead(sb, i, buf); |
| 3352 | overhead += blks; |
| 3353 | if (blks) |
| 3354 | memset(buf, 0, PAGE_SIZE); |
| 3355 | cond_resched(); |
| 3356 | } |
Eric Sandeen | b003b52 | 2014-11-25 16:27:44 -0500 | [diff] [blame] | 3357 | /* Add the internal journal blocks as well */ |
| 3358 | if (sbi->s_journal && !sbi->journal_bdev) |
Lukas Czerner | 810da24 | 2013-03-02 17:18:58 -0500 | [diff] [blame] | 3359 | overhead += EXT4_NUM_B2C(sbi, sbi->s_journal->j_maxlen); |
Eric Sandeen | 0875a2b | 2012-12-25 13:56:01 -0500 | [diff] [blame] | 3360 | |
Theodore Ts'o | 952fc18 | 2012-07-09 16:27:05 -0400 | [diff] [blame] | 3361 | sbi->s_overhead = overhead; |
| 3362 | smp_wmb(); |
| 3363 | free_page((unsigned long) buf); |
| 3364 | return 0; |
| 3365 | } |
| 3366 | |
Lukas Czerner | 27dd438 | 2013-04-09 22:11:22 -0400 | [diff] [blame] | 3367 | |
Jan Kara | 30fac0f | 2013-12-08 21:11:59 -0500 | [diff] [blame] | 3368 | static ext4_fsblk_t ext4_calculate_resv_clusters(struct super_block *sb) |
Lukas Czerner | 27dd438 | 2013-04-09 22:11:22 -0400 | [diff] [blame] | 3369 | { |
| 3370 | ext4_fsblk_t resv_clusters; |
| 3371 | |
| 3372 | /* |
Jan Kara | 30fac0f | 2013-12-08 21:11:59 -0500 | [diff] [blame] | 3373 | * There's no need to reserve anything when we aren't using extents. |
| 3374 | * The space estimates are exact, there are no unwritten extents, |
| 3375 | * hole punching doesn't need new metadata... This is needed especially |
| 3376 | * to keep ext2/3 backward compatibility. |
| 3377 | */ |
| 3378 | if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_EXTENTS)) |
| 3379 | return 0; |
| 3380 | /* |
Lukas Czerner | 27dd438 | 2013-04-09 22:11:22 -0400 | [diff] [blame] | 3381 | * By default we reserve 2% or 4096 clusters, whichever is smaller. |
| 3382 | * This should cover the situations where we can not afford to run |
| 3383 | * out of space like for example punch hole, or converting |
Lukas Czerner | 556615d | 2014-04-20 23:45:47 -0400 | [diff] [blame] | 3384 | * unwritten extents in delalloc path. In most cases such |
Lukas Czerner | 27dd438 | 2013-04-09 22:11:22 -0400 | [diff] [blame] | 3385 | * allocation would require 1, or 2 blocks, higher numbers are |
| 3386 | * very rare. |
| 3387 | */ |
Jan Kara | 30fac0f | 2013-12-08 21:11:59 -0500 | [diff] [blame] | 3388 | resv_clusters = ext4_blocks_count(EXT4_SB(sb)->s_es) >> |
| 3389 | EXT4_SB(sb)->s_cluster_bits; |
Lukas Czerner | 27dd438 | 2013-04-09 22:11:22 -0400 | [diff] [blame] | 3390 | |
| 3391 | do_div(resv_clusters, 50); |
| 3392 | resv_clusters = min_t(ext4_fsblk_t, resv_clusters, 4096); |
| 3393 | |
| 3394 | return resv_clusters; |
| 3395 | } |
| 3396 | |
| 3397 | |
| 3398 | static int ext4_reserve_clusters(struct ext4_sb_info *sbi, ext4_fsblk_t count) |
| 3399 | { |
| 3400 | ext4_fsblk_t clusters = ext4_blocks_count(sbi->s_es) >> |
| 3401 | sbi->s_cluster_bits; |
| 3402 | |
| 3403 | if (count >= clusters) |
| 3404 | return -EINVAL; |
| 3405 | |
| 3406 | atomic64_set(&sbi->s_resv_clusters, count); |
| 3407 | return 0; |
| 3408 | } |
| 3409 | |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 3410 | static int ext4_fill_super(struct super_block *sb, void *data, int silent) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3411 | { |
Curt Wohlgemuth | d4c402d | 2010-05-16 12:00:00 -0400 | [diff] [blame] | 3412 | char *orig_data = kstrdup(data, GFP_KERNEL); |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 3413 | struct buffer_head *bh; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3414 | struct ext4_super_block *es = NULL; |
| 3415 | struct ext4_sb_info *sbi; |
| 3416 | ext4_fsblk_t block; |
| 3417 | ext4_fsblk_t sb_block = get_sb_block(&data); |
Andrew Morton | 70bbb3e | 2006-10-11 01:21:20 -0700 | [diff] [blame] | 3418 | ext4_fsblk_t logical_sb_block; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3419 | unsigned long offset = 0; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3420 | unsigned long journal_devnum = 0; |
| 3421 | unsigned long def_mount_opts; |
| 3422 | struct inode *root; |
Theodore Ts'o | 9f6200b | 2008-09-23 09:18:24 -0400 | [diff] [blame] | 3423 | char *cp; |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 3424 | const char *descr; |
Cyrill Gorcunov | dcc7dae | 2010-07-27 11:56:07 -0400 | [diff] [blame] | 3425 | int ret = -ENOMEM; |
Theodore Ts'o | 281b599 | 2011-09-09 18:34:51 -0400 | [diff] [blame] | 3426 | int blocksize, clustersize; |
Theodore Ts'o | 4ec1102 | 2009-01-06 14:53:26 -0500 | [diff] [blame] | 3427 | unsigned int db_count; |
| 3428 | unsigned int i; |
Theodore Ts'o | 281b599 | 2011-09-09 18:34:51 -0400 | [diff] [blame] | 3429 | int needs_recovery, has_huge_files, has_bigalloc; |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 3430 | __u64 blocks_count; |
Lukas Czerner | 07aa2ea | 2012-11-08 15:16:54 -0500 | [diff] [blame] | 3431 | int err = 0; |
Theodore Ts'o | b3881f7 | 2009-01-05 22:46:26 -0500 | [diff] [blame] | 3432 | unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 3433 | ext4_group_t first_not_zeroed; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3434 | |
| 3435 | sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); |
| 3436 | if (!sbi) |
Cyrill Gorcunov | dcc7dae | 2010-07-27 11:56:07 -0400 | [diff] [blame] | 3437 | goto out_free_orig; |
Pekka Enberg | 705895b | 2009-02-15 18:07:52 -0500 | [diff] [blame] | 3438 | |
| 3439 | sbi->s_blockgroup_lock = |
| 3440 | kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); |
| 3441 | if (!sbi->s_blockgroup_lock) { |
| 3442 | kfree(sbi); |
Cyrill Gorcunov | dcc7dae | 2010-07-27 11:56:07 -0400 | [diff] [blame] | 3443 | goto out_free_orig; |
Pekka Enberg | 705895b | 2009-02-15 18:07:52 -0500 | [diff] [blame] | 3444 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3445 | sb->s_fs_info = sbi; |
Theodore Ts'o | 2c0544b | 2012-05-30 22:56:46 -0400 | [diff] [blame] | 3446 | sbi->s_sb = sb; |
Theodore Ts'o | 240799c | 2008-10-09 23:53:47 -0400 | [diff] [blame] | 3447 | sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; |
Miklos Szeredi | d9c9bef1 | 2007-10-16 23:26:27 -0700 | [diff] [blame] | 3448 | sbi->s_sb_block = sb_block; |
Theodore Ts'o | f613dfc | 2010-07-27 11:56:08 -0400 | [diff] [blame] | 3449 | if (sb->s_bdev->bd_part) |
| 3450 | sbi->s_sectors_written_start = |
| 3451 | part_stat_read(sb->s_bdev->bd_part, sectors[1]); |
Michael Halcrow | b30ab0e | 2015-04-12 00:43:56 -0400 | [diff] [blame] | 3452 | #ifdef CONFIG_EXT4_FS_ENCRYPTION |
| 3453 | /* Modes of operations for file and directory encryption. */ |
| 3454 | sbi->s_file_encryption_mode = EXT4_ENCRYPTION_MODE_AES_256_XTS; |
| 3455 | sbi->s_dir_encryption_mode = EXT4_ENCRYPTION_MODE_INVALID; |
| 3456 | #endif |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3457 | |
Theodore Ts'o | 9f6200b | 2008-09-23 09:18:24 -0400 | [diff] [blame] | 3458 | /* Cleanup superblock name */ |
| 3459 | for (cp = sb->s_id; (cp = strchr(cp, '/'));) |
| 3460 | *cp = '!'; |
| 3461 | |
Lukas Czerner | 07aa2ea | 2012-11-08 15:16:54 -0500 | [diff] [blame] | 3462 | /* -EINVAL is default */ |
Cyrill Gorcunov | dcc7dae | 2010-07-27 11:56:07 -0400 | [diff] [blame] | 3463 | ret = -EINVAL; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3464 | blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3465 | if (!blocksize) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3466 | ext4_msg(sb, KERN_ERR, "unable to set blocksize"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3467 | goto out_fail; |
| 3468 | } |
| 3469 | |
| 3470 | /* |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3471 | * The ext4 superblock will not be buffer aligned for other than 1kB |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3472 | * block sizes. We need to calculate the offset from buffer start. |
| 3473 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3474 | if (blocksize != EXT4_MIN_BLOCK_SIZE) { |
Andrew Morton | 70bbb3e | 2006-10-11 01:21:20 -0700 | [diff] [blame] | 3475 | logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; |
| 3476 | offset = do_div(logical_sb_block, blocksize); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3477 | } else { |
Andrew Morton | 70bbb3e | 2006-10-11 01:21:20 -0700 | [diff] [blame] | 3478 | logical_sb_block = sb_block; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3479 | } |
| 3480 | |
Gioh Kim | a8ac900 | 2014-09-04 22:36:15 -0400 | [diff] [blame] | 3481 | if (!(bh = sb_bread_unmovable(sb, logical_sb_block))) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3482 | ext4_msg(sb, KERN_ERR, "unable to read superblock"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3483 | goto out_fail; |
| 3484 | } |
| 3485 | /* |
| 3486 | * Note: s_es must be initialized as soon as possible because |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3487 | * some ext4 macro-instructions depend on its value |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3488 | */ |
Theodore Ts'o | 2716b80 | 2012-05-28 17:47:52 -0400 | [diff] [blame] | 3489 | es = (struct ext4_super_block *) (bh->b_data + offset); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3490 | sbi->s_es = es; |
| 3491 | sb->s_magic = le16_to_cpu(es->s_magic); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3492 | if (sb->s_magic != EXT4_SUPER_MAGIC) |
| 3493 | goto cantfind_ext4; |
Theodore Ts'o | afc32f7 | 2009-02-28 19:39:58 -0500 | [diff] [blame] | 3494 | sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3495 | |
Darrick J. Wong | feb0ab3 | 2012-04-29 18:45:10 -0400 | [diff] [blame] | 3496 | /* Warn if metadata_csum and gdt_csum are both set. */ |
| 3497 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, |
| 3498 | EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && |
| 3499 | EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) |
Jakub Wilk | 363307e | 2015-01-02 15:31:14 -0500 | [diff] [blame] | 3500 | ext4_warning(sb, "metadata_csum and uninit_bg are " |
Darrick J. Wong | feb0ab3 | 2012-04-29 18:45:10 -0400 | [diff] [blame] | 3501 | "redundant flags; please run fsck."); |
| 3502 | |
Darrick J. Wong | d25425f | 2012-04-29 18:25:10 -0400 | [diff] [blame] | 3503 | /* Check for a known checksum algorithm */ |
| 3504 | if (!ext4_verify_csum_type(sb, es)) { |
| 3505 | ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " |
| 3506 | "unknown checksum algorithm."); |
| 3507 | silent = 1; |
| 3508 | goto cantfind_ext4; |
| 3509 | } |
| 3510 | |
Darrick J. Wong | 0441984 | 2012-04-29 18:27:10 -0400 | [diff] [blame] | 3511 | /* Load the checksum driver */ |
| 3512 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, |
| 3513 | EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) { |
| 3514 | sbi->s_chksum_driver = crypto_alloc_shash("crc32c", 0, 0); |
| 3515 | if (IS_ERR(sbi->s_chksum_driver)) { |
| 3516 | ext4_msg(sb, KERN_ERR, "Cannot load crc32c driver."); |
| 3517 | ret = PTR_ERR(sbi->s_chksum_driver); |
| 3518 | sbi->s_chksum_driver = NULL; |
| 3519 | goto failed_mount; |
| 3520 | } |
| 3521 | } |
| 3522 | |
Darrick J. Wong | a9c47317 | 2012-04-29 18:29:10 -0400 | [diff] [blame] | 3523 | /* Check superblock checksum */ |
| 3524 | if (!ext4_superblock_csum_verify(sb, es)) { |
| 3525 | ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " |
| 3526 | "invalid superblock checksum. Run e2fsck?"); |
| 3527 | silent = 1; |
| 3528 | goto cantfind_ext4; |
| 3529 | } |
| 3530 | |
| 3531 | /* Precompute checksum seed for all metadata */ |
Dmitry Monakhov | 9aa5d32 | 2014-10-13 03:36:16 -0400 | [diff] [blame] | 3532 | if (ext4_has_metadata_csum(sb)) |
Darrick J. Wong | a9c47317 | 2012-04-29 18:29:10 -0400 | [diff] [blame] | 3533 | sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid, |
| 3534 | sizeof(es->s_uuid)); |
| 3535 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3536 | /* Set defaults before we parse the mount options */ |
| 3537 | def_mount_opts = le32_to_cpu(es->s_default_mount_opts); |
Theodore Ts'o | fd8c37e | 2010-12-15 20:26:48 -0500 | [diff] [blame] | 3538 | set_opt(sb, INIT_INODE_TABLE); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3539 | if (def_mount_opts & EXT4_DEFM_DEBUG) |
Theodore Ts'o | fd8c37e | 2010-12-15 20:26:48 -0500 | [diff] [blame] | 3540 | set_opt(sb, DEBUG); |
Theodore Ts'o | 87f2680 | 2012-03-02 00:03:21 -0500 | [diff] [blame] | 3541 | if (def_mount_opts & EXT4_DEFM_BSDGROUPS) |
Theodore Ts'o | fd8c37e | 2010-12-15 20:26:48 -0500 | [diff] [blame] | 3542 | set_opt(sb, GRPID); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3543 | if (def_mount_opts & EXT4_DEFM_UID16) |
Theodore Ts'o | fd8c37e | 2010-12-15 20:26:48 -0500 | [diff] [blame] | 3544 | set_opt(sb, NO_UID32); |
Eric Sandeen | ea66333 | 2011-02-23 17:51:51 -0500 | [diff] [blame] | 3545 | /* xattr user namespace & acls are now defaulted on */ |
Eric Sandeen | ea66333 | 2011-02-23 17:51:51 -0500 | [diff] [blame] | 3546 | set_opt(sb, XATTR_USER); |
Theodore Ts'o | 03010a3 | 2008-10-10 20:02:48 -0400 | [diff] [blame] | 3547 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
Eric Sandeen | ea66333 | 2011-02-23 17:51:51 -0500 | [diff] [blame] | 3548 | set_opt(sb, POSIX_ACL); |
Hugh Dickins | 2e7842b | 2007-02-10 01:46:13 -0800 | [diff] [blame] | 3549 | #endif |
Darrick J. Wong | 98c1a75 | 2014-10-30 10:53:16 -0400 | [diff] [blame] | 3550 | /* don't forget to enable journal_csum when metadata_csum is enabled. */ |
| 3551 | if (ext4_has_metadata_csum(sb)) |
| 3552 | set_opt(sb, JOURNAL_CHECKSUM); |
| 3553 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3554 | if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) |
Theodore Ts'o | fd8c37e | 2010-12-15 20:26:48 -0500 | [diff] [blame] | 3555 | set_opt(sb, JOURNAL_DATA); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3556 | else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) |
Theodore Ts'o | fd8c37e | 2010-12-15 20:26:48 -0500 | [diff] [blame] | 3557 | set_opt(sb, ORDERED_DATA); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3558 | else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) |
Theodore Ts'o | fd8c37e | 2010-12-15 20:26:48 -0500 | [diff] [blame] | 3559 | set_opt(sb, WRITEBACK_DATA); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3560 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3561 | if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) |
Theodore Ts'o | fd8c37e | 2010-12-15 20:26:48 -0500 | [diff] [blame] | 3562 | set_opt(sb, ERRORS_PANIC); |
Aneesh Kumar K.V | bb4f397 | 2008-01-28 23:58:26 -0500 | [diff] [blame] | 3563 | else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) |
Theodore Ts'o | fd8c37e | 2010-12-15 20:26:48 -0500 | [diff] [blame] | 3564 | set_opt(sb, ERRORS_CONT); |
Aneesh Kumar K.V | bb4f397 | 2008-01-28 23:58:26 -0500 | [diff] [blame] | 3565 | else |
Theodore Ts'o | fd8c37e | 2010-12-15 20:26:48 -0500 | [diff] [blame] | 3566 | set_opt(sb, ERRORS_RO); |
Darrick J. Wong | 45f1a9c | 2014-09-01 21:34:09 -0400 | [diff] [blame] | 3567 | /* block_validity enabled by default; disable with noblock_validity */ |
| 3568 | set_opt(sb, BLOCK_VALIDITY); |
Theodore Ts'o | 8b67f04 | 2010-08-01 23:14:20 -0400 | [diff] [blame] | 3569 | if (def_mount_opts & EXT4_DEFM_DISCARD) |
Theodore Ts'o | fd8c37e | 2010-12-15 20:26:48 -0500 | [diff] [blame] | 3570 | set_opt(sb, DISCARD); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3571 | |
Eric W. Biederman | 08cefc7 | 2012-02-07 15:41:49 -0800 | [diff] [blame] | 3572 | sbi->s_resuid = make_kuid(&init_user_ns, le16_to_cpu(es->s_def_resuid)); |
| 3573 | sbi->s_resgid = make_kgid(&init_user_ns, le16_to_cpu(es->s_def_resgid)); |
Theodore Ts'o | 3077384 | 2009-01-03 20:27:38 -0500 | [diff] [blame] | 3574 | sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; |
| 3575 | sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; |
| 3576 | sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3577 | |
Theodore Ts'o | 8b67f04 | 2010-08-01 23:14:20 -0400 | [diff] [blame] | 3578 | if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) |
Theodore Ts'o | fd8c37e | 2010-12-15 20:26:48 -0500 | [diff] [blame] | 3579 | set_opt(sb, BARRIER); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3580 | |
Mingming Cao | 1e2462f | 2007-07-18 09:00:55 -0400 | [diff] [blame] | 3581 | /* |
Aneesh Kumar K.V | dd919b9 | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 3582 | * enable delayed allocation by default |
| 3583 | * Use -o nodelalloc to turn it off |
| 3584 | */ |
Theodore Ts'o | bc0b75f | 2012-09-17 22:54:36 -0400 | [diff] [blame] | 3585 | if (!IS_EXT3_SB(sb) && !IS_EXT2_SB(sb) && |
Theodore Ts'o | 8b67f04 | 2010-08-01 23:14:20 -0400 | [diff] [blame] | 3586 | ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) |
Theodore Ts'o | fd8c37e | 2010-12-15 20:26:48 -0500 | [diff] [blame] | 3587 | set_opt(sb, DELALLOC); |
Aneesh Kumar K.V | dd919b9 | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 3588 | |
Lukas Czerner | 51ce651 | 2011-05-20 13:55:16 -0400 | [diff] [blame] | 3589 | /* |
| 3590 | * set default s_li_wait_mult for lazyinit, for the case there is |
| 3591 | * no mount option specified. |
| 3592 | */ |
| 3593 | sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; |
| 3594 | |
Theodore Ts'o | 8b67f04 | 2010-08-01 23:14:20 -0400 | [diff] [blame] | 3595 | if (!parse_options((char *) sbi->s_es->s_mount_opts, sb, |
Eric Sandeen | 661aa52 | 2012-02-20 17:53:04 -0500 | [diff] [blame] | 3596 | &journal_devnum, &journal_ioprio, 0)) { |
Theodore Ts'o | 8b67f04 | 2010-08-01 23:14:20 -0400 | [diff] [blame] | 3597 | ext4_msg(sb, KERN_WARNING, |
| 3598 | "failed to parse options in superblock: %s", |
| 3599 | sbi->s_es->s_mount_opts); |
| 3600 | } |
Theodore Ts'o | 5a916be | 2012-03-04 19:27:31 -0500 | [diff] [blame] | 3601 | sbi->s_def_mount_opt = sbi->s_mount_opt; |
Theodore Ts'o | b3881f7 | 2009-01-05 22:46:26 -0500 | [diff] [blame] | 3602 | if (!parse_options((char *) data, sb, &journal_devnum, |
Eric Sandeen | 661aa52 | 2012-02-20 17:53:04 -0500 | [diff] [blame] | 3603 | &journal_ioprio, 0)) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3604 | goto failed_mount; |
| 3605 | |
Theodore Ts'o | 5688978 | 2011-09-03 18:22:38 -0400 | [diff] [blame] | 3606 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { |
| 3607 | printk_once(KERN_WARNING "EXT4-fs: Warning: mounting " |
| 3608 | "with data=journal disables delayed " |
| 3609 | "allocation and O_DIRECT support!\n"); |
| 3610 | if (test_opt2(sb, EXPLICIT_DELALLOC)) { |
| 3611 | ext4_msg(sb, KERN_ERR, "can't mount with " |
| 3612 | "both data=journal and delalloc"); |
| 3613 | goto failed_mount; |
| 3614 | } |
| 3615 | if (test_opt(sb, DIOREAD_NOLOCK)) { |
| 3616 | ext4_msg(sb, KERN_ERR, "can't mount with " |
Piotr Sarna | 6ae6514 | 2013-08-08 23:02:24 -0400 | [diff] [blame] | 3617 | "both data=journal and dioread_nolock"); |
Theodore Ts'o | 5688978 | 2011-09-03 18:22:38 -0400 | [diff] [blame] | 3618 | goto failed_mount; |
| 3619 | } |
Ross Zwisler | 923ae0f | 2015-02-16 15:59:38 -0800 | [diff] [blame] | 3620 | if (test_opt(sb, DAX)) { |
| 3621 | ext4_msg(sb, KERN_ERR, "can't mount with " |
| 3622 | "both data=journal and dax"); |
| 3623 | goto failed_mount; |
| 3624 | } |
Theodore Ts'o | 5688978 | 2011-09-03 18:22:38 -0400 | [diff] [blame] | 3625 | if (test_opt(sb, DELALLOC)) |
| 3626 | clear_opt(sb, DELALLOC); |
| 3627 | } |
| 3628 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3629 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | |
Dmitry Monakhov | 482a742 | 2010-02-24 11:35:32 -0500 | [diff] [blame] | 3630 | (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3631 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3632 | if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && |
| 3633 | (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || |
| 3634 | EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || |
| 3635 | EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3636 | ext4_msg(sb, KERN_WARNING, |
| 3637 | "feature flags set on rev 0 fs, " |
| 3638 | "running e2fsck is recommended"); |
Theodore Tso | 469108f | 2008-02-10 01:11:44 -0500 | [diff] [blame] | 3639 | |
Theodore Ts'o | ed3654e | 2014-03-24 14:09:06 -0400 | [diff] [blame] | 3640 | if (es->s_creator_os == cpu_to_le32(EXT4_OS_HURD)) { |
| 3641 | set_opt2(sb, HURD_COMPAT); |
| 3642 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, |
| 3643 | EXT4_FEATURE_INCOMPAT_64BIT)) { |
| 3644 | ext4_msg(sb, KERN_ERR, |
| 3645 | "The Hurd can't support 64-bit file systems"); |
| 3646 | goto failed_mount; |
| 3647 | } |
| 3648 | } |
| 3649 | |
Theodore Ts'o | 2035e77 | 2011-04-18 17:29:14 -0400 | [diff] [blame] | 3650 | if (IS_EXT2_SB(sb)) { |
| 3651 | if (ext2_feature_set_ok(sb)) |
| 3652 | ext4_msg(sb, KERN_INFO, "mounting ext2 file system " |
| 3653 | "using the ext4 subsystem"); |
| 3654 | else { |
| 3655 | ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " |
| 3656 | "to feature incompatibilities"); |
| 3657 | goto failed_mount; |
| 3658 | } |
| 3659 | } |
| 3660 | |
| 3661 | if (IS_EXT3_SB(sb)) { |
| 3662 | if (ext3_feature_set_ok(sb)) |
| 3663 | ext4_msg(sb, KERN_INFO, "mounting ext3 file system " |
| 3664 | "using the ext4 subsystem"); |
| 3665 | else { |
| 3666 | ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " |
| 3667 | "to feature incompatibilities"); |
| 3668 | goto failed_mount; |
| 3669 | } |
| 3670 | } |
| 3671 | |
Theodore Tso | 469108f | 2008-02-10 01:11:44 -0500 | [diff] [blame] | 3672 | /* |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3673 | * Check feature flags regardless of the revision level, since we |
| 3674 | * previously didn't change the revision level when setting the flags, |
| 3675 | * so there is a chance incompat flags are set on a rev 0 filesystem. |
| 3676 | */ |
Eric Sandeen | a13fb1a | 2009-08-18 00:20:23 -0400 | [diff] [blame] | 3677 | if (!ext4_feature_set_ok(sb, (sb->s_flags & MS_RDONLY))) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3678 | goto failed_mount; |
Eric Sandeen | a13fb1a | 2009-08-18 00:20:23 -0400 | [diff] [blame] | 3679 | |
Jan Kara | 261cb20c | 2012-12-20 00:07:18 -0500 | [diff] [blame] | 3680 | blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3681 | if (blocksize < EXT4_MIN_BLOCK_SIZE || |
| 3682 | blocksize > EXT4_MAX_BLOCK_SIZE) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3683 | ext4_msg(sb, KERN_ERR, |
| 3684 | "Unsupported filesystem blocksize %d", blocksize); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3685 | goto failed_mount; |
| 3686 | } |
| 3687 | |
Ross Zwisler | 923ae0f | 2015-02-16 15:59:38 -0800 | [diff] [blame] | 3688 | if (sbi->s_mount_opt & EXT4_MOUNT_DAX) { |
| 3689 | if (blocksize != PAGE_SIZE) { |
| 3690 | ext4_msg(sb, KERN_ERR, |
| 3691 | "error: unsupported blocksize for dax"); |
| 3692 | goto failed_mount; |
| 3693 | } |
| 3694 | if (!sb->s_bdev->bd_disk->fops->direct_access) { |
| 3695 | ext4_msg(sb, KERN_ERR, |
| 3696 | "error: device does not support dax"); |
| 3697 | goto failed_mount; |
| 3698 | } |
| 3699 | } |
| 3700 | |
Theodore Ts'o | 6ddb244 | 2015-04-16 01:56:00 -0400 | [diff] [blame] | 3701 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_ENCRYPT) && |
| 3702 | es->s_encryption_level) { |
| 3703 | ext4_msg(sb, KERN_ERR, "Unsupported encryption level %d", |
| 3704 | es->s_encryption_level); |
| 3705 | goto failed_mount; |
| 3706 | } |
| 3707 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3708 | if (sb->s_blocksize != blocksize) { |
Aneesh Kumar K.V | ce40733 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 3709 | /* Validate the filesystem blocksize */ |
| 3710 | if (!sb_set_blocksize(sb, blocksize)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3711 | ext4_msg(sb, KERN_ERR, "bad block size %d", |
Aneesh Kumar K.V | ce40733 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 3712 | blocksize); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3713 | goto failed_mount; |
| 3714 | } |
| 3715 | |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 3716 | brelse(bh); |
Andrew Morton | 70bbb3e | 2006-10-11 01:21:20 -0700 | [diff] [blame] | 3717 | logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; |
| 3718 | offset = do_div(logical_sb_block, blocksize); |
Gioh Kim | a8ac900 | 2014-09-04 22:36:15 -0400 | [diff] [blame] | 3719 | bh = sb_bread_unmovable(sb, logical_sb_block); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3720 | if (!bh) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3721 | ext4_msg(sb, KERN_ERR, |
| 3722 | "Can't read superblock on 2nd try"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3723 | goto failed_mount; |
| 3724 | } |
Theodore Ts'o | 2716b80 | 2012-05-28 17:47:52 -0400 | [diff] [blame] | 3725 | es = (struct ext4_super_block *)(bh->b_data + offset); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3726 | sbi->s_es = es; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3727 | if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3728 | ext4_msg(sb, KERN_ERR, |
| 3729 | "Magic mismatch, very weird!"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3730 | goto failed_mount; |
| 3731 | } |
| 3732 | } |
| 3733 | |
Eric Sandeen | a13fb1a | 2009-08-18 00:20:23 -0400 | [diff] [blame] | 3734 | has_huge_files = EXT4_HAS_RO_COMPAT_FEATURE(sb, |
| 3735 | EXT4_FEATURE_RO_COMPAT_HUGE_FILE); |
Theodore Ts'o | f287a1a | 2008-10-16 22:50:48 -0400 | [diff] [blame] | 3736 | sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, |
| 3737 | has_huge_files); |
| 3738 | sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3739 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3740 | if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { |
| 3741 | sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; |
| 3742 | sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3743 | } else { |
| 3744 | sbi->s_inode_size = le16_to_cpu(es->s_inode_size); |
| 3745 | sbi->s_first_ino = le32_to_cpu(es->s_first_ino); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3746 | if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || |
Vignesh Babu | 1330593 | 2007-07-18 09:11:02 -0400 | [diff] [blame] | 3747 | (!is_power_of_2(sbi->s_inode_size)) || |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3748 | (sbi->s_inode_size > blocksize)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3749 | ext4_msg(sb, KERN_ERR, |
| 3750 | "unsupported inode size: %d", |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 3751 | sbi->s_inode_size); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3752 | goto failed_mount; |
| 3753 | } |
Kalpak Shah | ef7f383 | 2007-07-18 09:15:20 -0400 | [diff] [blame] | 3754 | if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) |
| 3755 | sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3756 | } |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 3757 | |
Alexandre Ratchov | 0d1ee42 | 2006-10-11 01:21:14 -0700 | [diff] [blame] | 3758 | sbi->s_desc_size = le16_to_cpu(es->s_desc_size); |
| 3759 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 3760 | if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || |
Alexandre Ratchov | 0d1ee42 | 2006-10-11 01:21:14 -0700 | [diff] [blame] | 3761 | sbi->s_desc_size > EXT4_MAX_DESC_SIZE || |
vignesh babu | d8ea6cf | 2007-10-16 23:27:14 -0700 | [diff] [blame] | 3762 | !is_power_of_2(sbi->s_desc_size)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3763 | ext4_msg(sb, KERN_ERR, |
| 3764 | "unsupported descriptor size %lu", |
Alexandre Ratchov | 0d1ee42 | 2006-10-11 01:21:14 -0700 | [diff] [blame] | 3765 | sbi->s_desc_size); |
| 3766 | goto failed_mount; |
| 3767 | } |
| 3768 | } else |
| 3769 | sbi->s_desc_size = EXT4_MIN_DESC_SIZE; |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 3770 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3771 | sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3772 | sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); |
Andries E. Brouwer | b47b6f3 | 2007-12-17 16:19:55 -0800 | [diff] [blame] | 3773 | if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3774 | goto cantfind_ext4; |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 3775 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3776 | sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3777 | if (sbi->s_inodes_per_block == 0) |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3778 | goto cantfind_ext4; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3779 | sbi->s_itb_per_group = sbi->s_inodes_per_group / |
| 3780 | sbi->s_inodes_per_block; |
Alexandre Ratchov | 0d1ee42 | 2006-10-11 01:21:14 -0700 | [diff] [blame] | 3781 | sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3782 | sbi->s_sbh = bh; |
| 3783 | sbi->s_mount_state = le16_to_cpu(es->s_state); |
Fengguang Wu | e57aa83 | 2007-10-16 23:26:25 -0700 | [diff] [blame] | 3784 | sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); |
| 3785 | sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 3786 | |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 3787 | for (i = 0; i < 4; i++) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3788 | sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); |
| 3789 | sbi->s_def_hash_version = es->s_def_hash_version; |
Theodore Ts'o | 2330141 | 2014-02-12 12:16:04 -0500 | [diff] [blame] | 3790 | if (EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_DIR_INDEX)) { |
| 3791 | i = le32_to_cpu(es->s_flags); |
| 3792 | if (i & EXT2_FLAGS_UNSIGNED_HASH) |
| 3793 | sbi->s_hash_unsigned = 3; |
| 3794 | else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { |
Theodore Ts'o | f99b258 | 2008-10-28 13:21:44 -0400 | [diff] [blame] | 3795 | #ifdef __CHAR_UNSIGNED__ |
Theodore Ts'o | 2330141 | 2014-02-12 12:16:04 -0500 | [diff] [blame] | 3796 | if (!(sb->s_flags & MS_RDONLY)) |
| 3797 | es->s_flags |= |
| 3798 | cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); |
| 3799 | sbi->s_hash_unsigned = 3; |
Theodore Ts'o | f99b258 | 2008-10-28 13:21:44 -0400 | [diff] [blame] | 3800 | #else |
Theodore Ts'o | 2330141 | 2014-02-12 12:16:04 -0500 | [diff] [blame] | 3801 | if (!(sb->s_flags & MS_RDONLY)) |
| 3802 | es->s_flags |= |
| 3803 | cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); |
Theodore Ts'o | f99b258 | 2008-10-28 13:21:44 -0400 | [diff] [blame] | 3804 | #endif |
Theodore Ts'o | 2330141 | 2014-02-12 12:16:04 -0500 | [diff] [blame] | 3805 | } |
Theodore Ts'o | f99b258 | 2008-10-28 13:21:44 -0400 | [diff] [blame] | 3806 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3807 | |
Theodore Ts'o | 281b599 | 2011-09-09 18:34:51 -0400 | [diff] [blame] | 3808 | /* Handle clustersize */ |
| 3809 | clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size); |
| 3810 | has_bigalloc = EXT4_HAS_RO_COMPAT_FEATURE(sb, |
| 3811 | EXT4_FEATURE_RO_COMPAT_BIGALLOC); |
| 3812 | if (has_bigalloc) { |
| 3813 | if (clustersize < blocksize) { |
| 3814 | ext4_msg(sb, KERN_ERR, |
| 3815 | "cluster size (%d) smaller than " |
| 3816 | "block size (%d)", clustersize, blocksize); |
| 3817 | goto failed_mount; |
| 3818 | } |
| 3819 | sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) - |
| 3820 | le32_to_cpu(es->s_log_block_size); |
| 3821 | sbi->s_clusters_per_group = |
| 3822 | le32_to_cpu(es->s_clusters_per_group); |
| 3823 | if (sbi->s_clusters_per_group > blocksize * 8) { |
| 3824 | ext4_msg(sb, KERN_ERR, |
| 3825 | "#clusters per group too big: %lu", |
| 3826 | sbi->s_clusters_per_group); |
| 3827 | goto failed_mount; |
| 3828 | } |
| 3829 | if (sbi->s_blocks_per_group != |
| 3830 | (sbi->s_clusters_per_group * (clustersize / blocksize))) { |
| 3831 | ext4_msg(sb, KERN_ERR, "blocks per group (%lu) and " |
| 3832 | "clusters per group (%lu) inconsistent", |
| 3833 | sbi->s_blocks_per_group, |
| 3834 | sbi->s_clusters_per_group); |
| 3835 | goto failed_mount; |
| 3836 | } |
| 3837 | } else { |
| 3838 | if (clustersize != blocksize) { |
| 3839 | ext4_warning(sb, "fragment/cluster size (%d) != " |
| 3840 | "block size (%d)", clustersize, |
| 3841 | blocksize); |
| 3842 | clustersize = blocksize; |
| 3843 | } |
| 3844 | if (sbi->s_blocks_per_group > blocksize * 8) { |
| 3845 | ext4_msg(sb, KERN_ERR, |
| 3846 | "#blocks per group too big: %lu", |
| 3847 | sbi->s_blocks_per_group); |
| 3848 | goto failed_mount; |
| 3849 | } |
| 3850 | sbi->s_clusters_per_group = sbi->s_blocks_per_group; |
| 3851 | sbi->s_cluster_bits = 0; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3852 | } |
Theodore Ts'o | 281b599 | 2011-09-09 18:34:51 -0400 | [diff] [blame] | 3853 | sbi->s_cluster_ratio = clustersize / blocksize; |
| 3854 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3855 | if (sbi->s_inodes_per_group > blocksize * 8) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3856 | ext4_msg(sb, KERN_ERR, |
| 3857 | "#inodes per group too big: %lu", |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 3858 | sbi->s_inodes_per_group); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3859 | goto failed_mount; |
| 3860 | } |
| 3861 | |
Theodore Ts'o | 960fd856 | 2013-07-05 23:11:16 -0400 | [diff] [blame] | 3862 | /* Do we have standard group size of clustersize * 8 blocks ? */ |
| 3863 | if (sbi->s_blocks_per_group == clustersize << 3) |
| 3864 | set_opt2(sb, STD_GROUP_SIZE); |
| 3865 | |
Eric Sandeen | bf43d84 | 2009-08-17 23:48:51 -0400 | [diff] [blame] | 3866 | /* |
| 3867 | * Test whether we have more sectors than will fit in sector_t, |
| 3868 | * and whether the max offset is addressable by the page cache. |
| 3869 | */ |
Darrick J. Wong | 5a9ae68 | 2010-11-19 09:56:44 -0500 | [diff] [blame] | 3870 | err = generic_check_addressable(sb->s_blocksize_bits, |
Patrick J. LoPresti | 30ca22c | 2010-07-22 15:03:41 -0700 | [diff] [blame] | 3871 | ext4_blocks_count(es)); |
Darrick J. Wong | 5a9ae68 | 2010-11-19 09:56:44 -0500 | [diff] [blame] | 3872 | if (err) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3873 | ext4_msg(sb, KERN_ERR, "filesystem" |
Eric Sandeen | bf43d84 | 2009-08-17 23:48:51 -0400 | [diff] [blame] | 3874 | " too large to mount safely on this system"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3875 | if (sizeof(sector_t) < 8) |
Bartlomiej Zolnierkiewicz | 90c699a | 2009-06-19 08:08:50 +0200 | [diff] [blame] | 3876 | ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3877 | goto failed_mount; |
| 3878 | } |
| 3879 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3880 | if (EXT4_BLOCKS_PER_GROUP(sb) == 0) |
| 3881 | goto cantfind_ext4; |
Eric Sandeen | e7c9559 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 3882 | |
From: Thiemo Nagel | 0f2ddca | 2009-04-07 14:07:47 -0400 | [diff] [blame] | 3883 | /* check blocks count against device size */ |
| 3884 | blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; |
| 3885 | if (blocks_count && ext4_blocks_count(es) > blocks_count) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3886 | ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " |
| 3887 | "exceeds size of device (%llu blocks)", |
From: Thiemo Nagel | 0f2ddca | 2009-04-07 14:07:47 -0400 | [diff] [blame] | 3888 | ext4_blocks_count(es), blocks_count); |
| 3889 | goto failed_mount; |
| 3890 | } |
| 3891 | |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 3892 | /* |
| 3893 | * It makes no sense for the first data block to be beyond the end |
| 3894 | * of the filesystem. |
| 3895 | */ |
| 3896 | if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { |
Zheng Liu | 5635a62 | 2011-12-18 16:13:58 -0500 | [diff] [blame] | 3897 | ext4_msg(sb, KERN_WARNING, "bad geometry: first data " |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3898 | "block %u is beyond end of filesystem (%llu)", |
| 3899 | le32_to_cpu(es->s_first_data_block), |
| 3900 | ext4_blocks_count(es)); |
Eric Sandeen | e7c9559 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 3901 | goto failed_mount; |
| 3902 | } |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 3903 | blocks_count = (ext4_blocks_count(es) - |
| 3904 | le32_to_cpu(es->s_first_data_block) + |
| 3905 | EXT4_BLOCKS_PER_GROUP(sb) - 1); |
| 3906 | do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); |
Theodore Ts'o | 4ec1102 | 2009-01-06 14:53:26 -0500 | [diff] [blame] | 3907 | if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3908 | ext4_msg(sb, KERN_WARNING, "groups count too large: %u " |
Theodore Ts'o | 4ec1102 | 2009-01-06 14:53:26 -0500 | [diff] [blame] | 3909 | "(block count %llu, first data block %u, " |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3910 | "blocks per group %lu)", sbi->s_groups_count, |
Theodore Ts'o | 4ec1102 | 2009-01-06 14:53:26 -0500 | [diff] [blame] | 3911 | ext4_blocks_count(es), |
| 3912 | le32_to_cpu(es->s_first_data_block), |
| 3913 | EXT4_BLOCKS_PER_GROUP(sb)); |
| 3914 | goto failed_mount; |
| 3915 | } |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 3916 | sbi->s_groups_count = blocks_count; |
Eric Sandeen | fb0a387 | 2009-09-16 14:45:10 -0400 | [diff] [blame] | 3917 | sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, |
| 3918 | (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3919 | db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / |
| 3920 | EXT4_DESC_PER_BLOCK(sb); |
Theodore Ts'o | f18a5f2 | 2011-08-01 08:45:38 -0400 | [diff] [blame] | 3921 | sbi->s_group_desc = ext4_kvmalloc(db_count * |
| 3922 | sizeof(struct buffer_head *), |
| 3923 | GFP_KERNEL); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3924 | if (sbi->s_group_desc == NULL) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3925 | ext4_msg(sb, KERN_ERR, "not enough memory"); |
Theodore Ts'o | 2cde417 | 2012-05-28 17:49:54 -0400 | [diff] [blame] | 3926 | ret = -ENOMEM; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3927 | goto failed_mount; |
| 3928 | } |
| 3929 | |
Theodore Ts'o | 9f6200b | 2008-09-23 09:18:24 -0400 | [diff] [blame] | 3930 | if (ext4_proc_root) |
| 3931 | sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); |
Theodore Ts'o | 240799c | 2008-10-09 23:53:47 -0400 | [diff] [blame] | 3932 | |
Theodore Ts'o | 66acdcf | 2012-03-04 20:21:38 -0500 | [diff] [blame] | 3933 | if (sbi->s_proc) |
| 3934 | proc_create_data("options", S_IRUGO, sbi->s_proc, |
| 3935 | &ext4_seq_options_fops, sb); |
| 3936 | |
Pekka Enberg | 705895b | 2009-02-15 18:07:52 -0500 | [diff] [blame] | 3937 | bgl_lock_init(sbi->s_blockgroup_lock); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3938 | |
| 3939 | for (i = 0; i < db_count; i++) { |
Andrew Morton | 70bbb3e | 2006-10-11 01:21:20 -0700 | [diff] [blame] | 3940 | block = descriptor_loc(sb, logical_sb_block, i); |
Gioh Kim | a8ac900 | 2014-09-04 22:36:15 -0400 | [diff] [blame] | 3941 | sbi->s_group_desc[i] = sb_bread_unmovable(sb, block); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3942 | if (!sbi->s_group_desc[i]) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3943 | ext4_msg(sb, KERN_ERR, |
| 3944 | "can't read group descriptor %d", i); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3945 | db_count = i; |
| 3946 | goto failed_mount2; |
| 3947 | } |
| 3948 | } |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 3949 | if (!ext4_check_descriptors(sb, &first_not_zeroed)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3950 | ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); |
Theodore Ts'o | f9ae9cf | 2014-07-11 13:55:40 -0400 | [diff] [blame] | 3951 | goto failed_mount2; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3952 | } |
Jose R. Santos | 772cb7c | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 3953 | |
Theodore Ts'o | f9ae9cf | 2014-07-11 13:55:40 -0400 | [diff] [blame] | 3954 | sbi->s_gdb_count = db_count; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3955 | get_random_bytes(&sbi->s_next_generation, sizeof(u32)); |
| 3956 | spin_lock_init(&sbi->s_next_gen_lock); |
| 3957 | |
Jan Mrazek | 04ecddb | 2015-01-26 14:42:31 -0500 | [diff] [blame] | 3958 | setup_timer(&sbi->s_err_report, print_daily_error_info, |
| 3959 | (unsigned long) sb); |
Tao Ma | 0449641 | 2011-04-05 19:55:28 -0400 | [diff] [blame] | 3960 | |
Dmitry Monakhov | a75ae78f | 2013-04-03 22:10:52 -0400 | [diff] [blame] | 3961 | /* Register extent status tree shrinker */ |
Zheng Liu | eb68d0e | 2014-09-01 22:26:49 -0400 | [diff] [blame] | 3962 | if (ext4_es_register_shrinker(sbi)) |
Theodore Ts'o | ce7e010 | 2010-11-03 12:03:21 -0400 | [diff] [blame] | 3963 | goto failed_mount3; |
Theodore Ts'o | ce7e010 | 2010-11-03 12:03:21 -0400 | [diff] [blame] | 3964 | |
Alex Tomas | c9de560 | 2008-01-29 00:19:52 -0500 | [diff] [blame] | 3965 | sbi->s_stripe = ext4_get_stripe_size(sbi); |
Zheng Liu | 67a5da5 | 2012-08-17 09:54:17 -0400 | [diff] [blame] | 3966 | sbi->s_extent_max_zeroout_kb = 32; |
Alex Tomas | c9de560 | 2008-01-29 00:19:52 -0500 | [diff] [blame] | 3967 | |
Theodore Ts'o | f9ae9cf | 2014-07-11 13:55:40 -0400 | [diff] [blame] | 3968 | /* |
| 3969 | * set up enough so that it can read an inode |
| 3970 | */ |
Theodore Ts'o | f6e63f9 | 2014-09-18 17:12:30 -0400 | [diff] [blame] | 3971 | sb->s_op = &ext4_sops; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3972 | sb->s_export_op = &ext4_export_ops; |
| 3973 | sb->s_xattr = ext4_xattr_handlers; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3974 | #ifdef CONFIG_QUOTA |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3975 | sb->dq_op = &ext4_quota_operations; |
Jan Kara | 262b466 | 2013-03-02 17:57:08 -0500 | [diff] [blame] | 3976 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) |
Jan Kara | 1fa5efe | 2014-10-08 18:26:54 +0200 | [diff] [blame] | 3977 | sb->s_qcop = &dquot_quotactl_sysfile_ops; |
Jan Kara | 262b466 | 2013-03-02 17:57:08 -0500 | [diff] [blame] | 3978 | else |
| 3979 | sb->s_qcop = &ext4_qctl_operations; |
Jan Kara | 96c7e0d | 2014-09-29 14:58:25 +0200 | [diff] [blame] | 3980 | sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3981 | #endif |
Aneesh Kumar K.V | f2fa2ff | 2011-01-29 18:43:40 +0530 | [diff] [blame] | 3982 | memcpy(sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); |
| 3983 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3984 | INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ |
Theodore Ts'o | 3b9d4ed | 2009-04-25 22:54:04 -0400 | [diff] [blame] | 3985 | mutex_init(&sbi->s_orphan_lock); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3986 | |
| 3987 | sb->s_root = NULL; |
| 3988 | |
| 3989 | needs_recovery = (es->s_last_orphan != 0 || |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3990 | EXT4_HAS_INCOMPAT_FEATURE(sb, |
| 3991 | EXT4_FEATURE_INCOMPAT_RECOVER)); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3992 | |
Johann Lombardi | c5e06d1 | 2011-05-24 18:31:25 -0400 | [diff] [blame] | 3993 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_MMP) && |
| 3994 | !(sb->s_flags & MS_RDONLY)) |
| 3995 | if (ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block))) |
Darrick J. Wong | 50460fe | 2014-10-30 10:53:16 -0400 | [diff] [blame] | 3996 | goto failed_mount3a; |
Johann Lombardi | c5e06d1 | 2011-05-24 18:31:25 -0400 | [diff] [blame] | 3997 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3998 | /* |
| 3999 | * The first inode we look at is the journal inode. Don't try |
| 4000 | * root first: it may be modified in the journal! |
| 4001 | */ |
| 4002 | if (!test_opt(sb, NOLOAD) && |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4003 | EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { |
| 4004 | if (ext4_load_journal(sb, es, journal_devnum)) |
Darrick J. Wong | 50460fe | 2014-10-30 10:53:16 -0400 | [diff] [blame] | 4005 | goto failed_mount3a; |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 4006 | } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && |
| 4007 | EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 4008 | ext4_msg(sb, KERN_ERR, "required journal recovery " |
| 4009 | "suppressed and not mounted read-only"); |
Jiaying Zhang | 744692d | 2010-03-04 16:14:02 -0500 | [diff] [blame] | 4010 | goto failed_mount_wq; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4011 | } else { |
Theodore Ts'o | fd8c37e | 2010-12-15 20:26:48 -0500 | [diff] [blame] | 4012 | clear_opt(sb, DATA_FLAGS); |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 4013 | sbi->s_journal = NULL; |
| 4014 | needs_recovery = 0; |
| 4015 | goto no_journal; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4016 | } |
| 4017 | |
Theodore Ts'o | f32aaf2 | 2012-05-21 11:42:02 -0400 | [diff] [blame] | 4018 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT) && |
Jose R. Santos | eb40a09 | 2007-07-18 08:37:25 -0400 | [diff] [blame] | 4019 | !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, |
| 4020 | JBD2_FEATURE_INCOMPAT_64BIT)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 4021 | ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); |
Jiaying Zhang | 744692d | 2010-03-04 16:14:02 -0500 | [diff] [blame] | 4022 | goto failed_mount_wq; |
Jose R. Santos | eb40a09 | 2007-07-18 08:37:25 -0400 | [diff] [blame] | 4023 | } |
| 4024 | |
Darrick J. Wong | 25ed6e8 | 2012-05-27 07:48:56 -0400 | [diff] [blame] | 4025 | if (!set_journal_csum_feature_set(sb)) { |
| 4026 | ext4_msg(sb, KERN_ERR, "Failed to set journal checksum " |
| 4027 | "feature set"); |
| 4028 | goto failed_mount_wq; |
Linus Torvalds | d4da6c9 | 2009-11-02 10:15:27 -0800 | [diff] [blame] | 4029 | } |
Girish Shilamkar | 818d276 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 4030 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4031 | /* We have now updated the journal if required, so we can |
| 4032 | * validate the data journaling mode. */ |
| 4033 | switch (test_opt(sb, DATA_FLAGS)) { |
| 4034 | case 0: |
| 4035 | /* No mode set, assume a default based on the journal |
Andrew Morton | 63f5793 | 2006-10-11 01:21:24 -0700 | [diff] [blame] | 4036 | * capabilities: ORDERED_DATA if the journal can |
| 4037 | * cope, else JOURNAL_DATA |
| 4038 | */ |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 4039 | if (jbd2_journal_check_available_features |
| 4040 | (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) |
Theodore Ts'o | fd8c37e | 2010-12-15 20:26:48 -0500 | [diff] [blame] | 4041 | set_opt(sb, ORDERED_DATA); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4042 | else |
Theodore Ts'o | fd8c37e | 2010-12-15 20:26:48 -0500 | [diff] [blame] | 4043 | set_opt(sb, JOURNAL_DATA); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4044 | break; |
| 4045 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4046 | case EXT4_MOUNT_ORDERED_DATA: |
| 4047 | case EXT4_MOUNT_WRITEBACK_DATA: |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 4048 | if (!jbd2_journal_check_available_features |
| 4049 | (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 4050 | ext4_msg(sb, KERN_ERR, "Journal does not support " |
| 4051 | "requested data journaling mode"); |
Jiaying Zhang | 744692d | 2010-03-04 16:14:02 -0500 | [diff] [blame] | 4052 | goto failed_mount_wq; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4053 | } |
| 4054 | default: |
| 4055 | break; |
| 4056 | } |
Theodore Ts'o | b3881f7 | 2009-01-05 22:46:26 -0500 | [diff] [blame] | 4057 | set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4058 | |
Bobi Jam | 18aadd4 | 2012-02-20 17:53:02 -0500 | [diff] [blame] | 4059 | sbi->s_journal->j_commit_callback = ext4_journal_commit_callback; |
| 4060 | |
Theodore Ts'o | ce7e010 | 2010-11-03 12:03:21 -0400 | [diff] [blame] | 4061 | no_journal: |
T Makphaibulchoke | 9c191f7 | 2014-03-18 19:24:49 -0400 | [diff] [blame] | 4062 | if (ext4_mballoc_ready) { |
| 4063 | sbi->s_mb_cache = ext4_xattr_create_cache(sb->s_id); |
| 4064 | if (!sbi->s_mb_cache) { |
| 4065 | ext4_msg(sb, KERN_ERR, "Failed to create an mb_cache"); |
| 4066 | goto failed_mount_wq; |
| 4067 | } |
| 4068 | } |
| 4069 | |
Theodore Ts'o | 6ddb244 | 2015-04-16 01:56:00 -0400 | [diff] [blame] | 4070 | if (unlikely(sbi->s_mount_flags & EXT4_MF_TEST_DUMMY_ENCRYPTION) && |
| 4071 | !(sb->s_flags & MS_RDONLY) && |
| 4072 | !EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_ENCRYPT)) { |
| 4073 | EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_ENCRYPT); |
| 4074 | ext4_commit_super(sb, 1); |
| 4075 | } |
| 4076 | |
Tejun Heo | fd89d5f | 2011-02-01 11:42:42 +0100 | [diff] [blame] | 4077 | /* |
Theodore Ts'o | 952fc18 | 2012-07-09 16:27:05 -0400 | [diff] [blame] | 4078 | * Get the # of file system overhead blocks from the |
| 4079 | * superblock if present. |
| 4080 | */ |
| 4081 | if (es->s_overhead_clusters) |
| 4082 | sbi->s_overhead = le32_to_cpu(es->s_overhead_clusters); |
| 4083 | else { |
Lukas Czerner | 07aa2ea | 2012-11-08 15:16:54 -0500 | [diff] [blame] | 4084 | err = ext4_calculate_overhead(sb); |
| 4085 | if (err) |
Theodore Ts'o | 952fc18 | 2012-07-09 16:27:05 -0400 | [diff] [blame] | 4086 | goto failed_mount_wq; |
| 4087 | } |
| 4088 | |
| 4089 | /* |
Tejun Heo | fd89d5f | 2011-02-01 11:42:42 +0100 | [diff] [blame] | 4090 | * The maximum number of concurrent works can be high and |
| 4091 | * concurrency isn't really necessary. Limit it to 1. |
| 4092 | */ |
Jan Kara | 2e8fa54 | 2013-06-04 14:21:02 -0400 | [diff] [blame] | 4093 | EXT4_SB(sb)->rsv_conversion_wq = |
| 4094 | alloc_workqueue("ext4-rsv-conversion", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); |
| 4095 | if (!EXT4_SB(sb)->rsv_conversion_wq) { |
| 4096 | printk(KERN_ERR "EXT4-fs: failed to create workqueue\n"); |
Lukas Czerner | 07aa2ea | 2012-11-08 15:16:54 -0500 | [diff] [blame] | 4097 | ret = -ENOMEM; |
Jan Kara | 2e8fa54 | 2013-06-04 14:21:02 -0400 | [diff] [blame] | 4098 | goto failed_mount4; |
| 4099 | } |
| 4100 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4101 | /* |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 4102 | * The jbd2_journal_load will have done any necessary log recovery, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4103 | * so we can safely mount the rest of the filesystem now. |
| 4104 | */ |
| 4105 | |
David Howells | 1d1fe1e | 2008-02-07 00:15:37 -0800 | [diff] [blame] | 4106 | root = ext4_iget(sb, EXT4_ROOT_INO); |
| 4107 | if (IS_ERR(root)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 4108 | ext4_msg(sb, KERN_ERR, "get root inode failed"); |
David Howells | 1d1fe1e | 2008-02-07 00:15:37 -0800 | [diff] [blame] | 4109 | ret = PTR_ERR(root); |
Manish Katiyar | 32a9bb5 | 2011-02-27 20:42:06 -0500 | [diff] [blame] | 4110 | root = NULL; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4111 | goto failed_mount4; |
| 4112 | } |
| 4113 | if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 4114 | ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); |
Al Viro | 94bf608 | 2012-01-09 15:53:24 -0500 | [diff] [blame] | 4115 | iput(root); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4116 | goto failed_mount4; |
| 4117 | } |
Al Viro | 48fde70 | 2012-01-08 22:15:13 -0500 | [diff] [blame] | 4118 | sb->s_root = d_make_root(root); |
David Howells | 1d1fe1e | 2008-02-07 00:15:37 -0800 | [diff] [blame] | 4119 | if (!sb->s_root) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 4120 | ext4_msg(sb, KERN_ERR, "get root dentry failed"); |
David Howells | 1d1fe1e | 2008-02-07 00:15:37 -0800 | [diff] [blame] | 4121 | ret = -ENOMEM; |
| 4122 | goto failed_mount4; |
| 4123 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4124 | |
Eric Sandeen | 7e84b62 | 2012-05-28 14:17:25 -0400 | [diff] [blame] | 4125 | if (ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY)) |
| 4126 | sb->s_flags |= MS_RDONLY; |
Kalpak Shah | ef7f383 | 2007-07-18 09:15:20 -0400 | [diff] [blame] | 4127 | |
| 4128 | /* determine the minimum size of new large inodes, if present */ |
| 4129 | if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { |
| 4130 | sbi->s_want_extra_isize = sizeof(struct ext4_inode) - |
| 4131 | EXT4_GOOD_OLD_INODE_SIZE; |
| 4132 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, |
| 4133 | EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { |
| 4134 | if (sbi->s_want_extra_isize < |
| 4135 | le16_to_cpu(es->s_want_extra_isize)) |
| 4136 | sbi->s_want_extra_isize = |
| 4137 | le16_to_cpu(es->s_want_extra_isize); |
| 4138 | if (sbi->s_want_extra_isize < |
| 4139 | le16_to_cpu(es->s_min_extra_isize)) |
| 4140 | sbi->s_want_extra_isize = |
| 4141 | le16_to_cpu(es->s_min_extra_isize); |
| 4142 | } |
| 4143 | } |
| 4144 | /* Check if enough inode space is available */ |
| 4145 | if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > |
| 4146 | sbi->s_inode_size) { |
| 4147 | sbi->s_want_extra_isize = sizeof(struct ext4_inode) - |
| 4148 | EXT4_GOOD_OLD_INODE_SIZE; |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 4149 | ext4_msg(sb, KERN_INFO, "required extra inode space not" |
| 4150 | "available"); |
Kalpak Shah | ef7f383 | 2007-07-18 09:15:20 -0400 | [diff] [blame] | 4151 | } |
| 4152 | |
Jan Kara | 30fac0f | 2013-12-08 21:11:59 -0500 | [diff] [blame] | 4153 | err = ext4_reserve_clusters(sbi, ext4_calculate_resv_clusters(sb)); |
Lukas Czerner | 27dd438 | 2013-04-09 22:11:22 -0400 | [diff] [blame] | 4154 | if (err) { |
| 4155 | ext4_msg(sb, KERN_ERR, "failed to reserve %llu clusters for " |
Jan Kara | 30fac0f | 2013-12-08 21:11:59 -0500 | [diff] [blame] | 4156 | "reserved pool", ext4_calculate_resv_clusters(sb)); |
Theodore Ts'o | f9ae9cf | 2014-07-11 13:55:40 -0400 | [diff] [blame] | 4157 | goto failed_mount4a; |
Lukas Czerner | 27dd438 | 2013-04-09 22:11:22 -0400 | [diff] [blame] | 4158 | } |
| 4159 | |
Theodore Ts'o | 6fd058f | 2009-05-17 15:38:01 -0400 | [diff] [blame] | 4160 | err = ext4_setup_system_zone(sb); |
| 4161 | if (err) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 4162 | ext4_msg(sb, KERN_ERR, "failed to initialize system " |
Curt Wohlgemuth | fbe845d | 2010-05-16 13:00:00 -0400 | [diff] [blame] | 4163 | "zone (%d)", err); |
Theodore Ts'o | f9ae9cf | 2014-07-11 13:55:40 -0400 | [diff] [blame] | 4164 | goto failed_mount4a; |
| 4165 | } |
| 4166 | |
| 4167 | ext4_ext_init(sb); |
| 4168 | err = ext4_mb_init(sb); |
| 4169 | if (err) { |
| 4170 | ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", |
| 4171 | err); |
Tao Ma | dcf2d80 | 2011-10-06 12:10:11 -0400 | [diff] [blame] | 4172 | goto failed_mount5; |
Aneesh Kumar K.V | c2774d8 | 2008-10-10 20:07:20 -0400 | [diff] [blame] | 4173 | } |
| 4174 | |
Theodore Ts'o | d5e03cb | 2014-07-15 06:01:38 -0400 | [diff] [blame] | 4175 | block = ext4_count_free_clusters(sb); |
| 4176 | ext4_free_blocks_count_set(sbi->s_es, |
| 4177 | EXT4_C2B(sbi, block)); |
Tejun Heo | 908c7f1 | 2014-09-08 09:51:29 +0900 | [diff] [blame] | 4178 | err = percpu_counter_init(&sbi->s_freeclusters_counter, block, |
| 4179 | GFP_KERNEL); |
Theodore Ts'o | d5e03cb | 2014-07-15 06:01:38 -0400 | [diff] [blame] | 4180 | if (!err) { |
| 4181 | unsigned long freei = ext4_count_free_inodes(sb); |
| 4182 | sbi->s_es->s_free_inodes_count = cpu_to_le32(freei); |
Tejun Heo | 908c7f1 | 2014-09-08 09:51:29 +0900 | [diff] [blame] | 4183 | err = percpu_counter_init(&sbi->s_freeinodes_counter, freei, |
| 4184 | GFP_KERNEL); |
Theodore Ts'o | d5e03cb | 2014-07-15 06:01:38 -0400 | [diff] [blame] | 4185 | } |
| 4186 | if (!err) |
| 4187 | err = percpu_counter_init(&sbi->s_dirs_counter, |
Tejun Heo | 908c7f1 | 2014-09-08 09:51:29 +0900 | [diff] [blame] | 4188 | ext4_count_dirs(sb), GFP_KERNEL); |
Theodore Ts'o | d5e03cb | 2014-07-15 06:01:38 -0400 | [diff] [blame] | 4189 | if (!err) |
Tejun Heo | 908c7f1 | 2014-09-08 09:51:29 +0900 | [diff] [blame] | 4190 | err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0, |
| 4191 | GFP_KERNEL); |
Theodore Ts'o | d5e03cb | 2014-07-15 06:01:38 -0400 | [diff] [blame] | 4192 | if (err) { |
| 4193 | ext4_msg(sb, KERN_ERR, "insufficient memory"); |
| 4194 | goto failed_mount6; |
| 4195 | } |
| 4196 | |
| 4197 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) |
| 4198 | if (!ext4_fill_flex_info(sb)) { |
| 4199 | ext4_msg(sb, KERN_ERR, |
| 4200 | "unable to initialize " |
| 4201 | "flex_bg meta info!"); |
| 4202 | goto failed_mount6; |
| 4203 | } |
| 4204 | |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 4205 | err = ext4_register_li_request(sb, first_not_zeroed); |
| 4206 | if (err) |
Tao Ma | dcf2d80 | 2011-10-06 12:10:11 -0400 | [diff] [blame] | 4207 | goto failed_mount6; |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 4208 | |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 4209 | sbi->s_kobj.kset = ext4_kset; |
| 4210 | init_completion(&sbi->s_kobj_unregister); |
| 4211 | err = kobject_init_and_add(&sbi->s_kobj, &ext4_ktype, NULL, |
| 4212 | "%s", sb->s_id); |
Tao Ma | dcf2d80 | 2011-10-06 12:10:11 -0400 | [diff] [blame] | 4213 | if (err) |
| 4214 | goto failed_mount7; |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 4215 | |
Jan Kara | 9b2ff357 | 2013-03-02 18:22:38 -0500 | [diff] [blame] | 4216 | #ifdef CONFIG_QUOTA |
| 4217 | /* Enable quota usage during mount. */ |
| 4218 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) && |
| 4219 | !(sb->s_flags & MS_RDONLY)) { |
| 4220 | err = ext4_enable_quotas(sb); |
| 4221 | if (err) |
| 4222 | goto failed_mount8; |
| 4223 | } |
| 4224 | #endif /* CONFIG_QUOTA */ |
| 4225 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4226 | EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; |
| 4227 | ext4_orphan_cleanup(sb, es); |
| 4228 | EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 4229 | if (needs_recovery) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 4230 | ext4_msg(sb, KERN_INFO, "recovery complete"); |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 4231 | ext4_mark_recovery_complete(sb, es); |
| 4232 | } |
| 4233 | if (EXT4_SB(sb)->s_journal) { |
| 4234 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) |
| 4235 | descr = " journalled data mode"; |
| 4236 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) |
| 4237 | descr = " ordered data mode"; |
| 4238 | else |
| 4239 | descr = " writeback data mode"; |
| 4240 | } else |
| 4241 | descr = "out journal"; |
| 4242 | |
Lukas Czerner | 79add3a | 2012-11-08 13:28:29 -0500 | [diff] [blame] | 4243 | if (test_opt(sb, DISCARD)) { |
| 4244 | struct request_queue *q = bdev_get_queue(sb->s_bdev); |
| 4245 | if (!blk_queue_discard(q)) |
| 4246 | ext4_msg(sb, KERN_WARNING, |
| 4247 | "mounting with \"discard\" option, but " |
| 4248 | "the device does not support discard"); |
| 4249 | } |
| 4250 | |
Curt Wohlgemuth | d4c402d | 2010-05-16 12:00:00 -0400 | [diff] [blame] | 4251 | ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " |
Theodore Ts'o | 8b67f04 | 2010-08-01 23:14:20 -0400 | [diff] [blame] | 4252 | "Opts: %s%s%s", descr, sbi->s_es->s_mount_opts, |
| 4253 | *sbi->s_es->s_mount_opts ? "; " : "", orig_data); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4254 | |
Theodore Ts'o | 66e61a9 | 2010-07-27 11:56:04 -0400 | [diff] [blame] | 4255 | if (es->s_error_count) |
| 4256 | mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4257 | |
Theodore Ts'o | efbed4d | 2013-10-17 21:11:01 -0400 | [diff] [blame] | 4258 | /* Enable message ratelimiting. Default is 10 messages per 5 secs. */ |
| 4259 | ratelimit_state_init(&sbi->s_err_ratelimit_state, 5 * HZ, 10); |
| 4260 | ratelimit_state_init(&sbi->s_warning_ratelimit_state, 5 * HZ, 10); |
| 4261 | ratelimit_state_init(&sbi->s_msg_ratelimit_state, 5 * HZ, 10); |
| 4262 | |
Curt Wohlgemuth | d4c402d | 2010-05-16 12:00:00 -0400 | [diff] [blame] | 4263 | kfree(orig_data); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4264 | return 0; |
| 4265 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4266 | cantfind_ext4: |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4267 | if (!silent) |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 4268 | ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4269 | goto failed_mount; |
| 4270 | |
Theodore Ts'o | 72ba745 | 2013-01-24 23:24:54 -0500 | [diff] [blame] | 4271 | #ifdef CONFIG_QUOTA |
| 4272 | failed_mount8: |
| 4273 | kobject_del(&sbi->s_kobj); |
| 4274 | #endif |
Tao Ma | dcf2d80 | 2011-10-06 12:10:11 -0400 | [diff] [blame] | 4275 | failed_mount7: |
| 4276 | ext4_unregister_li_request(sb); |
| 4277 | failed_mount6: |
Theodore Ts'o | f9ae9cf | 2014-07-11 13:55:40 -0400 | [diff] [blame] | 4278 | ext4_mb_release(sb); |
Theodore Ts'o | d5e03cb | 2014-07-15 06:01:38 -0400 | [diff] [blame] | 4279 | if (sbi->s_flex_groups) |
Al Viro | b93b41d | 2014-11-20 12:19:11 -0500 | [diff] [blame] | 4280 | kvfree(sbi->s_flex_groups); |
Theodore Ts'o | d5e03cb | 2014-07-15 06:01:38 -0400 | [diff] [blame] | 4281 | percpu_counter_destroy(&sbi->s_freeclusters_counter); |
| 4282 | percpu_counter_destroy(&sbi->s_freeinodes_counter); |
| 4283 | percpu_counter_destroy(&sbi->s_dirs_counter); |
| 4284 | percpu_counter_destroy(&sbi->s_dirtyclusters_counter); |
Azat Khuzhin | 0076493 | 2014-04-07 10:54:20 -0400 | [diff] [blame] | 4285 | failed_mount5: |
Theodore Ts'o | f9ae9cf | 2014-07-11 13:55:40 -0400 | [diff] [blame] | 4286 | ext4_ext_release(sb); |
| 4287 | ext4_release_system_zone(sb); |
| 4288 | failed_mount4a: |
Al Viro | 94bf608 | 2012-01-09 15:53:24 -0500 | [diff] [blame] | 4289 | dput(sb->s_root); |
Manish Katiyar | 32a9bb5 | 2011-02-27 20:42:06 -0500 | [diff] [blame] | 4290 | sb->s_root = NULL; |
Al Viro | 94bf608 | 2012-01-09 15:53:24 -0500 | [diff] [blame] | 4291 | failed_mount4: |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 4292 | ext4_msg(sb, KERN_ERR, "mount failed"); |
Jan Kara | 2e8fa54 | 2013-06-04 14:21:02 -0400 | [diff] [blame] | 4293 | if (EXT4_SB(sb)->rsv_conversion_wq) |
| 4294 | destroy_workqueue(EXT4_SB(sb)->rsv_conversion_wq); |
Mingming Cao | 4c0425f | 2009-09-28 15:48:41 -0400 | [diff] [blame] | 4295 | failed_mount_wq: |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 4296 | if (sbi->s_journal) { |
| 4297 | jbd2_journal_destroy(sbi->s_journal); |
| 4298 | sbi->s_journal = NULL; |
| 4299 | } |
Darrick J. Wong | 50460fe | 2014-10-30 10:53:16 -0400 | [diff] [blame] | 4300 | failed_mount3a: |
Zheng Liu | d3922a7 | 2013-07-01 08:12:37 -0400 | [diff] [blame] | 4301 | ext4_es_unregister_shrinker(sbi); |
Zheng Liu | eb68d0e | 2014-09-01 22:26:49 -0400 | [diff] [blame] | 4302 | failed_mount3: |
Al Viro | 9105bb1 | 2013-12-08 20:52:31 -0500 | [diff] [blame] | 4303 | del_timer_sync(&sbi->s_err_report); |
Johann Lombardi | c5e06d1 | 2011-05-24 18:31:25 -0400 | [diff] [blame] | 4304 | if (sbi->s_mmp_tsk) |
| 4305 | kthread_stop(sbi->s_mmp_tsk); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4306 | failed_mount2: |
| 4307 | for (i = 0; i < db_count; i++) |
| 4308 | brelse(sbi->s_group_desc[i]); |
Al Viro | b93b41d | 2014-11-20 12:19:11 -0500 | [diff] [blame] | 4309 | kvfree(sbi->s_group_desc); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4310 | failed_mount: |
Darrick J. Wong | 0441984 | 2012-04-29 18:27:10 -0400 | [diff] [blame] | 4311 | if (sbi->s_chksum_driver) |
| 4312 | crypto_free_shash(sbi->s_chksum_driver); |
Theodore Ts'o | 240799c | 2008-10-09 23:53:47 -0400 | [diff] [blame] | 4313 | if (sbi->s_proc) { |
Theodore Ts'o | 66acdcf | 2012-03-04 20:21:38 -0500 | [diff] [blame] | 4314 | remove_proc_entry("options", sbi->s_proc); |
Theodore Ts'o | 9f6200b | 2008-09-23 09:18:24 -0400 | [diff] [blame] | 4315 | remove_proc_entry(sb->s_id, ext4_proc_root); |
Theodore Ts'o | 240799c | 2008-10-09 23:53:47 -0400 | [diff] [blame] | 4316 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4317 | #ifdef CONFIG_QUOTA |
Jan Kara | a2d4a64 | 2014-09-11 11:15:15 -0400 | [diff] [blame] | 4318 | for (i = 0; i < EXT4_MAXQUOTAS; i++) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4319 | kfree(sbi->s_qf_names[i]); |
| 4320 | #endif |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4321 | ext4_blkdev_remove(sbi); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4322 | brelse(bh); |
| 4323 | out_fail: |
| 4324 | sb->s_fs_info = NULL; |
Manish Katiyar | f683016 | 2009-05-17 23:52:44 -0400 | [diff] [blame] | 4325 | kfree(sbi->s_blockgroup_lock); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4326 | kfree(sbi); |
Cyrill Gorcunov | dcc7dae | 2010-07-27 11:56:07 -0400 | [diff] [blame] | 4327 | out_free_orig: |
Curt Wohlgemuth | d4c402d | 2010-05-16 12:00:00 -0400 | [diff] [blame] | 4328 | kfree(orig_data); |
Lukas Czerner | 07aa2ea | 2012-11-08 15:16:54 -0500 | [diff] [blame] | 4329 | return err ? err : ret; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4330 | } |
| 4331 | |
| 4332 | /* |
| 4333 | * Setup any per-fs journal parameters now. We'll do this both on |
| 4334 | * initial mount, once the journal has been initialised but before we've |
| 4335 | * done any recovery; and again on any subsequent remount. |
| 4336 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4337 | static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4338 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4339 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4340 | |
Theodore Ts'o | 3077384 | 2009-01-03 20:27:38 -0500 | [diff] [blame] | 4341 | journal->j_commit_interval = sbi->s_commit_interval; |
| 4342 | journal->j_min_batch_time = sbi->s_min_batch_time; |
| 4343 | journal->j_max_batch_time = sbi->s_max_batch_time; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4344 | |
Theodore Ts'o | a931da6 | 2010-08-03 21:35:12 -0400 | [diff] [blame] | 4345 | write_lock(&journal->j_state_lock); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4346 | if (test_opt(sb, BARRIER)) |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 4347 | journal->j_flags |= JBD2_BARRIER; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4348 | else |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 4349 | journal->j_flags &= ~JBD2_BARRIER; |
Hidehiro Kawai | 5bf5683 | 2008-10-10 22:12:43 -0400 | [diff] [blame] | 4350 | if (test_opt(sb, DATA_ERR_ABORT)) |
| 4351 | journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; |
| 4352 | else |
| 4353 | journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; |
Theodore Ts'o | a931da6 | 2010-08-03 21:35:12 -0400 | [diff] [blame] | 4354 | write_unlock(&journal->j_state_lock); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4355 | } |
| 4356 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4357 | static journal_t *ext4_get_journal(struct super_block *sb, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4358 | unsigned int journal_inum) |
| 4359 | { |
| 4360 | struct inode *journal_inode; |
| 4361 | journal_t *journal; |
| 4362 | |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 4363 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
| 4364 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4365 | /* First, test for the existence of a valid inode on disk. Bad |
| 4366 | * things happen if we iget() an unused inode, as the subsequent |
| 4367 | * iput() will try to delete it. */ |
| 4368 | |
David Howells | 1d1fe1e | 2008-02-07 00:15:37 -0800 | [diff] [blame] | 4369 | journal_inode = ext4_iget(sb, journal_inum); |
| 4370 | if (IS_ERR(journal_inode)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 4371 | ext4_msg(sb, KERN_ERR, "no journal found"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4372 | return NULL; |
| 4373 | } |
| 4374 | if (!journal_inode->i_nlink) { |
| 4375 | make_bad_inode(journal_inode); |
| 4376 | iput(journal_inode); |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 4377 | ext4_msg(sb, KERN_ERR, "journal inode is deleted"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4378 | return NULL; |
| 4379 | } |
| 4380 | |
Theodore Ts'o | e5f8eab8 | 2008-09-08 22:25:04 -0400 | [diff] [blame] | 4381 | jbd_debug(2, "Journal inode found at %p: %lld bytes\n", |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4382 | journal_inode, journal_inode->i_size); |
David Howells | 1d1fe1e | 2008-02-07 00:15:37 -0800 | [diff] [blame] | 4383 | if (!S_ISREG(journal_inode->i_mode)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 4384 | ext4_msg(sb, KERN_ERR, "invalid journal inode"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4385 | iput(journal_inode); |
| 4386 | return NULL; |
| 4387 | } |
| 4388 | |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 4389 | journal = jbd2_journal_init_inode(journal_inode); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4390 | if (!journal) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 4391 | ext4_msg(sb, KERN_ERR, "Could not load journal inode"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4392 | iput(journal_inode); |
| 4393 | return NULL; |
| 4394 | } |
| 4395 | journal->j_private = sb; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4396 | ext4_init_journal_params(sb, journal); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4397 | return journal; |
| 4398 | } |
| 4399 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4400 | static journal_t *ext4_get_dev_journal(struct super_block *sb, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4401 | dev_t j_dev) |
| 4402 | { |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 4403 | struct buffer_head *bh; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4404 | journal_t *journal; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4405 | ext4_fsblk_t start; |
| 4406 | ext4_fsblk_t len; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4407 | int hblock, blocksize; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4408 | ext4_fsblk_t sb_block; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4409 | unsigned long offset; |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 4410 | struct ext4_super_block *es; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4411 | struct block_device *bdev; |
| 4412 | |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 4413 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
| 4414 | |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 4415 | bdev = ext4_blkdev_get(j_dev, sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4416 | if (bdev == NULL) |
| 4417 | return NULL; |
| 4418 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4419 | blocksize = sb->s_blocksize; |
Martin K. Petersen | e1defc4 | 2009-05-22 17:17:49 -0400 | [diff] [blame] | 4420 | hblock = bdev_logical_block_size(bdev); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4421 | if (blocksize < hblock) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 4422 | ext4_msg(sb, KERN_ERR, |
| 4423 | "blocksize too small for journal device"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4424 | goto out_bdev; |
| 4425 | } |
| 4426 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4427 | sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; |
| 4428 | offset = EXT4_MIN_BLOCK_SIZE % blocksize; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4429 | set_blocksize(bdev, blocksize); |
| 4430 | if (!(bh = __bread(bdev, sb_block, blocksize))) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 4431 | ext4_msg(sb, KERN_ERR, "couldn't read superblock of " |
| 4432 | "external journal"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4433 | goto out_bdev; |
| 4434 | } |
| 4435 | |
Theodore Ts'o | 2716b80 | 2012-05-28 17:47:52 -0400 | [diff] [blame] | 4436 | es = (struct ext4_super_block *) (bh->b_data + offset); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4437 | if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4438 | !(le32_to_cpu(es->s_feature_incompat) & |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4439 | EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 4440 | ext4_msg(sb, KERN_ERR, "external journal has " |
| 4441 | "bad superblock"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4442 | brelse(bh); |
| 4443 | goto out_bdev; |
| 4444 | } |
| 4445 | |
Darrick J. Wong | df4763b | 2014-09-11 11:44:36 -0400 | [diff] [blame] | 4446 | if ((le32_to_cpu(es->s_feature_ro_compat) & |
| 4447 | EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && |
| 4448 | es->s_checksum != ext4_superblock_csum(sb, es)) { |
| 4449 | ext4_msg(sb, KERN_ERR, "external journal has " |
| 4450 | "corrupt superblock"); |
| 4451 | brelse(bh); |
| 4452 | goto out_bdev; |
| 4453 | } |
| 4454 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4455 | if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 4456 | ext4_msg(sb, KERN_ERR, "journal UUID does not match"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4457 | brelse(bh); |
| 4458 | goto out_bdev; |
| 4459 | } |
| 4460 | |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 4461 | len = ext4_blocks_count(es); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4462 | start = sb_block + 1; |
| 4463 | brelse(bh); /* we're done with the superblock */ |
| 4464 | |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 4465 | journal = jbd2_journal_init_dev(bdev, sb->s_bdev, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4466 | start, len, blocksize); |
| 4467 | if (!journal) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 4468 | ext4_msg(sb, KERN_ERR, "failed to create device journal"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4469 | goto out_bdev; |
| 4470 | } |
| 4471 | journal->j_private = sb; |
Theodore Ts'o | 9f20350 | 2013-04-20 15:46:17 -0400 | [diff] [blame] | 4472 | ll_rw_block(READ | REQ_META | REQ_PRIO, 1, &journal->j_sb_buffer); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4473 | wait_on_buffer(journal->j_sb_buffer); |
| 4474 | if (!buffer_uptodate(journal->j_sb_buffer)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 4475 | ext4_msg(sb, KERN_ERR, "I/O error on journal device"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4476 | goto out_journal; |
| 4477 | } |
| 4478 | if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 4479 | ext4_msg(sb, KERN_ERR, "External journal has more than one " |
| 4480 | "user (unsupported) - %d", |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4481 | be32_to_cpu(journal->j_superblock->s_nr_users)); |
| 4482 | goto out_journal; |
| 4483 | } |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4484 | EXT4_SB(sb)->journal_bdev = bdev; |
| 4485 | ext4_init_journal_params(sb, journal); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4486 | return journal; |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 4487 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4488 | out_journal: |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 4489 | jbd2_journal_destroy(journal); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4490 | out_bdev: |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4491 | ext4_blkdev_put(bdev); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4492 | return NULL; |
| 4493 | } |
| 4494 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4495 | static int ext4_load_journal(struct super_block *sb, |
| 4496 | struct ext4_super_block *es, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4497 | unsigned long journal_devnum) |
| 4498 | { |
| 4499 | journal_t *journal; |
| 4500 | unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); |
| 4501 | dev_t journal_dev; |
| 4502 | int err = 0; |
| 4503 | int really_read_only; |
| 4504 | |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 4505 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
| 4506 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4507 | if (journal_devnum && |
| 4508 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 4509 | ext4_msg(sb, KERN_INFO, "external journal device major/minor " |
| 4510 | "numbers have changed"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4511 | journal_dev = new_decode_dev(journal_devnum); |
| 4512 | } else |
| 4513 | journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); |
| 4514 | |
| 4515 | really_read_only = bdev_read_only(sb->s_bdev); |
| 4516 | |
| 4517 | /* |
| 4518 | * Are we loading a blank journal or performing recovery after a |
| 4519 | * crash? For recovery, we need to check in advance whether we |
| 4520 | * can get read-write access to the device. |
| 4521 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4522 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4523 | if (sb->s_flags & MS_RDONLY) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 4524 | ext4_msg(sb, KERN_INFO, "INFO: recovery " |
| 4525 | "required on readonly filesystem"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4526 | if (really_read_only) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 4527 | ext4_msg(sb, KERN_ERR, "write access " |
| 4528 | "unavailable, cannot proceed"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4529 | return -EROFS; |
| 4530 | } |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 4531 | ext4_msg(sb, KERN_INFO, "write access will " |
| 4532 | "be enabled during recovery"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4533 | } |
| 4534 | } |
| 4535 | |
| 4536 | if (journal_inum && journal_dev) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 4537 | ext4_msg(sb, KERN_ERR, "filesystem has both journal " |
| 4538 | "and inode journals!"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4539 | return -EINVAL; |
| 4540 | } |
| 4541 | |
| 4542 | if (journal_inum) { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4543 | if (!(journal = ext4_get_journal(sb, journal_inum))) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4544 | return -EINVAL; |
| 4545 | } else { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4546 | if (!(journal = ext4_get_dev_journal(sb, journal_dev))) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4547 | return -EINVAL; |
| 4548 | } |
| 4549 | |
Theodore Ts'o | 90576c0 | 2009-09-29 15:51:30 -0400 | [diff] [blame] | 4550 | if (!(journal->j_flags & JBD2_BARRIER)) |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 4551 | ext4_msg(sb, KERN_INFO, "barriers disabled"); |
Theodore Ts'o | 4776004f | 2008-09-08 23:00:52 -0400 | [diff] [blame] | 4552 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4553 | if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 4554 | err = jbd2_journal_wipe(journal, !really_read_only); |
Theodore Ts'o | 1c13d5c | 2010-07-27 11:56:03 -0400 | [diff] [blame] | 4555 | if (!err) { |
| 4556 | char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); |
| 4557 | if (save) |
| 4558 | memcpy(save, ((char *) es) + |
| 4559 | EXT4_S_ERR_START, EXT4_S_ERR_LEN); |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 4560 | err = jbd2_journal_load(journal); |
Theodore Ts'o | 1c13d5c | 2010-07-27 11:56:03 -0400 | [diff] [blame] | 4561 | if (save) |
| 4562 | memcpy(((char *) es) + EXT4_S_ERR_START, |
| 4563 | save, EXT4_S_ERR_LEN); |
| 4564 | kfree(save); |
| 4565 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4566 | |
| 4567 | if (err) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 4568 | ext4_msg(sb, KERN_ERR, "error loading journal"); |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 4569 | jbd2_journal_destroy(journal); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4570 | return err; |
| 4571 | } |
| 4572 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4573 | EXT4_SB(sb)->s_journal = journal; |
| 4574 | ext4_clear_journal_err(sb, es); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4575 | |
Maciej Żenczykowski | c41303c | 2010-10-27 21:30:06 -0400 | [diff] [blame] | 4576 | if (!really_read_only && journal_devnum && |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4577 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { |
| 4578 | es->s_journal_dev = cpu_to_le32(journal_devnum); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4579 | |
| 4580 | /* Make sure we flush the recovery flag to disk. */ |
Theodore Ts'o | e2d6705 | 2009-05-01 00:33:44 -0400 | [diff] [blame] | 4581 | ext4_commit_super(sb, 1); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4582 | } |
| 4583 | |
| 4584 | return 0; |
| 4585 | } |
| 4586 | |
Theodore Ts'o | e2d6705 | 2009-05-01 00:33:44 -0400 | [diff] [blame] | 4587 | static int ext4_commit_super(struct super_block *sb, int sync) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4588 | { |
Theodore Ts'o | e2d6705 | 2009-05-01 00:33:44 -0400 | [diff] [blame] | 4589 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4590 | struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; |
Takashi Sato | c4be0c1 | 2009-01-09 16:40:58 -0800 | [diff] [blame] | 4591 | int error = 0; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4592 | |
Christoph Hellwig | 08439fe | 2015-04-02 23:56:32 -0400 | [diff] [blame] | 4593 | if (!sbh) |
Takashi Sato | c4be0c1 | 2009-01-09 16:40:58 -0800 | [diff] [blame] | 4594 | return error; |
Theodore Ts'o | 914258b | 2008-10-06 21:35:40 -0400 | [diff] [blame] | 4595 | if (buffer_write_io_error(sbh)) { |
| 4596 | /* |
| 4597 | * Oh, dear. A previous attempt to write the |
| 4598 | * superblock failed. This could happen because the |
| 4599 | * USB device was yanked out. Or it could happen to |
| 4600 | * be a transient write error and maybe the block will |
| 4601 | * be remapped. Nothing we can do but to retry the |
| 4602 | * write and hope for the best. |
| 4603 | */ |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 4604 | ext4_msg(sb, KERN_ERR, "previous I/O error to " |
| 4605 | "superblock detected"); |
Theodore Ts'o | 914258b | 2008-10-06 21:35:40 -0400 | [diff] [blame] | 4606 | clear_buffer_write_io_error(sbh); |
| 4607 | set_buffer_uptodate(sbh); |
| 4608 | } |
Theodore Ts'o | 71290b3 | 2009-09-10 17:31:04 -0400 | [diff] [blame] | 4609 | /* |
| 4610 | * If the file system is mounted read-only, don't update the |
| 4611 | * superblock write time. This avoids updating the superblock |
| 4612 | * write time when we are mounting the root file system |
| 4613 | * read/only but we need to replay the journal; at that point, |
| 4614 | * for people who are east of GMT and who make their clock |
| 4615 | * tick in localtime for Windows bug-for-bug compatibility, |
| 4616 | * the clock is set in the future, and this will cause e2fsck |
| 4617 | * to complain and force a full file system check. |
| 4618 | */ |
| 4619 | if (!(sb->s_flags & MS_RDONLY)) |
| 4620 | es->s_wtime = cpu_to_le32(get_seconds()); |
Theodore Ts'o | f613dfc | 2010-07-27 11:56:08 -0400 | [diff] [blame] | 4621 | if (sb->s_bdev->bd_part) |
| 4622 | es->s_kbytes_written = |
| 4623 | cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + |
Theodore Ts'o | afc32f7 | 2009-02-28 19:39:58 -0500 | [diff] [blame] | 4624 | ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - |
| 4625 | EXT4_SB(sb)->s_sectors_written_start) >> 1)); |
Theodore Ts'o | f613dfc | 2010-07-27 11:56:08 -0400 | [diff] [blame] | 4626 | else |
| 4627 | es->s_kbytes_written = |
| 4628 | cpu_to_le64(EXT4_SB(sb)->s_kbytes_written); |
Theodore Ts'o | d5e03cb | 2014-07-15 06:01:38 -0400 | [diff] [blame] | 4629 | if (percpu_counter_initialized(&EXT4_SB(sb)->s_freeclusters_counter)) |
| 4630 | ext4_free_blocks_count_set(es, |
Theodore Ts'o | 5704265 | 2011-09-09 18:56:51 -0400 | [diff] [blame] | 4631 | EXT4_C2B(EXT4_SB(sb), percpu_counter_sum_positive( |
| 4632 | &EXT4_SB(sb)->s_freeclusters_counter))); |
Theodore Ts'o | d5e03cb | 2014-07-15 06:01:38 -0400 | [diff] [blame] | 4633 | if (percpu_counter_initialized(&EXT4_SB(sb)->s_freeinodes_counter)) |
| 4634 | es->s_free_inodes_count = |
| 4635 | cpu_to_le32(percpu_counter_sum_positive( |
Theodore Ts'o | ce7e010 | 2010-11-03 12:03:21 -0400 | [diff] [blame] | 4636 | &EXT4_SB(sb)->s_freeinodes_counter)); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4637 | BUFFER_TRACE(sbh, "marking dirty"); |
Theodore Ts'o | 06db49e | 2012-10-10 01:06:58 -0400 | [diff] [blame] | 4638 | ext4_superblock_csum_set(sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4639 | mark_buffer_dirty(sbh); |
Theodore Ts'o | 914258b | 2008-10-06 21:35:40 -0400 | [diff] [blame] | 4640 | if (sync) { |
Takashi Sato | c4be0c1 | 2009-01-09 16:40:58 -0800 | [diff] [blame] | 4641 | error = sync_dirty_buffer(sbh); |
| 4642 | if (error) |
| 4643 | return error; |
| 4644 | |
| 4645 | error = buffer_write_io_error(sbh); |
| 4646 | if (error) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 4647 | ext4_msg(sb, KERN_ERR, "I/O error while writing " |
| 4648 | "superblock"); |
Theodore Ts'o | 914258b | 2008-10-06 21:35:40 -0400 | [diff] [blame] | 4649 | clear_buffer_write_io_error(sbh); |
| 4650 | set_buffer_uptodate(sbh); |
| 4651 | } |
| 4652 | } |
Takashi Sato | c4be0c1 | 2009-01-09 16:40:58 -0800 | [diff] [blame] | 4653 | return error; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4654 | } |
| 4655 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4656 | /* |
| 4657 | * Have we just finished recovery? If so, and if we are mounting (or |
| 4658 | * remounting) the filesystem readonly, then we will end up with a |
| 4659 | * consistent fs on disk. Record that fact. |
| 4660 | */ |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 4661 | static void ext4_mark_recovery_complete(struct super_block *sb, |
| 4662 | struct ext4_super_block *es) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4663 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4664 | journal_t *journal = EXT4_SB(sb)->s_journal; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4665 | |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 4666 | if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { |
| 4667 | BUG_ON(journal != NULL); |
| 4668 | return; |
| 4669 | } |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 4670 | jbd2_journal_lock_updates(journal); |
Hidehiro Kawai | 7ffe1ea | 2008-10-10 20:29:21 -0400 | [diff] [blame] | 4671 | if (jbd2_journal_flush(journal) < 0) |
| 4672 | goto out; |
| 4673 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4674 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4675 | sb->s_flags & MS_RDONLY) { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4676 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
Theodore Ts'o | e2d6705 | 2009-05-01 00:33:44 -0400 | [diff] [blame] | 4677 | ext4_commit_super(sb, 1); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4678 | } |
Hidehiro Kawai | 7ffe1ea | 2008-10-10 20:29:21 -0400 | [diff] [blame] | 4679 | |
| 4680 | out: |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 4681 | jbd2_journal_unlock_updates(journal); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4682 | } |
| 4683 | |
| 4684 | /* |
| 4685 | * If we are mounting (or read-write remounting) a filesystem whose journal |
| 4686 | * has recorded an error from a previous lifetime, move that error to the |
| 4687 | * main filesystem now. |
| 4688 | */ |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 4689 | static void ext4_clear_journal_err(struct super_block *sb, |
| 4690 | struct ext4_super_block *es) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4691 | { |
| 4692 | journal_t *journal; |
| 4693 | int j_errno; |
| 4694 | const char *errstr; |
| 4695 | |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 4696 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
| 4697 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4698 | journal = EXT4_SB(sb)->s_journal; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4699 | |
| 4700 | /* |
| 4701 | * Now check for any error status which may have been recorded in the |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4702 | * journal by a prior ext4_error() or ext4_abort() |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4703 | */ |
| 4704 | |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 4705 | j_errno = jbd2_journal_errno(journal); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4706 | if (j_errno) { |
| 4707 | char nbuf[16]; |
| 4708 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4709 | errstr = ext4_decode_error(sb, j_errno, nbuf); |
Eric Sandeen | 12062dd | 2010-02-15 14:19:27 -0500 | [diff] [blame] | 4710 | ext4_warning(sb, "Filesystem error recorded " |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4711 | "from previous mount: %s", errstr); |
Eric Sandeen | 12062dd | 2010-02-15 14:19:27 -0500 | [diff] [blame] | 4712 | ext4_warning(sb, "Marking fs in need of filesystem check."); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4713 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4714 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; |
| 4715 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); |
Theodore Ts'o | e2d6705 | 2009-05-01 00:33:44 -0400 | [diff] [blame] | 4716 | ext4_commit_super(sb, 1); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4717 | |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 4718 | jbd2_journal_clear_err(journal); |
Theodore Ts'o | d796c52 | 2012-08-05 19:04:57 -0400 | [diff] [blame] | 4719 | jbd2_journal_update_sb_errno(journal); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4720 | } |
| 4721 | } |
| 4722 | |
| 4723 | /* |
| 4724 | * Force the running and committing transactions to commit, |
| 4725 | * and wait on the commit. |
| 4726 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4727 | int ext4_force_commit(struct super_block *sb) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4728 | { |
| 4729 | journal_t *journal; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4730 | |
| 4731 | if (sb->s_flags & MS_RDONLY) |
| 4732 | return 0; |
| 4733 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4734 | journal = EXT4_SB(sb)->s_journal; |
Guo Chao | b1deefc | 2013-01-28 21:41:02 -0500 | [diff] [blame] | 4735 | return ext4_journal_force_commit(journal); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4736 | } |
| 4737 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4738 | static int ext4_sync_fs(struct super_block *sb, int wait) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4739 | { |
Theodore Ts'o | 14ce0cb | 2008-11-03 18:10:55 -0500 | [diff] [blame] | 4740 | int ret = 0; |
Jan Kara | 9eddacf | 2009-02-10 06:46:05 -0500 | [diff] [blame] | 4741 | tid_t target; |
Dmitry Monakhov | 06a407f | 2013-06-12 22:25:07 -0400 | [diff] [blame] | 4742 | bool needs_barrier = false; |
Mingming Cao | 8d5d02e | 2009-09-28 15:48:29 -0400 | [diff] [blame] | 4743 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4744 | |
Theodore Ts'o | 9bffad1 | 2009-06-17 11:48:11 -0400 | [diff] [blame] | 4745 | trace_ext4_sync_fs(sb, wait); |
Jan Kara | 2e8fa54 | 2013-06-04 14:21:02 -0400 | [diff] [blame] | 4746 | flush_workqueue(sbi->rsv_conversion_wq); |
Jan Kara | a117782 | 2012-07-03 16:45:29 +0200 | [diff] [blame] | 4747 | /* |
| 4748 | * Writeback quota in non-journalled quota case - journalled quota has |
| 4749 | * no dirty dquots |
| 4750 | */ |
| 4751 | dquot_writeback_dquots(sb, -1); |
Dmitry Monakhov | 06a407f | 2013-06-12 22:25:07 -0400 | [diff] [blame] | 4752 | /* |
| 4753 | * Data writeback is possible w/o journal transaction, so barrier must |
| 4754 | * being sent at the end of the function. But we can skip it if |
| 4755 | * transaction_commit will do it for us. |
| 4756 | */ |
Theodore Ts'o | bda3253 | 2014-09-18 16:12:37 -0400 | [diff] [blame] | 4757 | if (sbi->s_journal) { |
| 4758 | target = jbd2_get_latest_transaction(sbi->s_journal); |
| 4759 | if (wait && sbi->s_journal->j_flags & JBD2_BARRIER && |
| 4760 | !jbd2_trans_will_send_data_barrier(sbi->s_journal, target)) |
| 4761 | needs_barrier = true; |
Dmitry Monakhov | 06a407f | 2013-06-12 22:25:07 -0400 | [diff] [blame] | 4762 | |
Theodore Ts'o | bda3253 | 2014-09-18 16:12:37 -0400 | [diff] [blame] | 4763 | if (jbd2_journal_start_commit(sbi->s_journal, &target)) { |
| 4764 | if (wait) |
| 4765 | ret = jbd2_log_wait_commit(sbi->s_journal, |
| 4766 | target); |
| 4767 | } |
| 4768 | } else if (wait && test_opt(sb, BARRIER)) |
| 4769 | needs_barrier = true; |
Dmitry Monakhov | 06a407f | 2013-06-12 22:25:07 -0400 | [diff] [blame] | 4770 | if (needs_barrier) { |
| 4771 | int err; |
| 4772 | err = blkdev_issue_flush(sb->s_bdev, GFP_KERNEL, NULL); |
| 4773 | if (!ret) |
| 4774 | ret = err; |
| 4775 | } |
| 4776 | |
| 4777 | return ret; |
| 4778 | } |
| 4779 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4780 | /* |
| 4781 | * LVM calls this function before a (read-only) snapshot is created. This |
| 4782 | * gives us a chance to flush the journal completely and mark the fs clean. |
Yongqiang Yang | be4f27d | 2011-04-10 22:06:07 -0400 | [diff] [blame] | 4783 | * |
| 4784 | * Note that only this function cannot bring a filesystem to be in a clean |
Jan Kara | 8e8ad8a | 2012-06-12 16:20:38 +0200 | [diff] [blame] | 4785 | * state independently. It relies on upper layer to stop all data & metadata |
| 4786 | * modifications. |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4787 | */ |
Takashi Sato | c4be0c1 | 2009-01-09 16:40:58 -0800 | [diff] [blame] | 4788 | static int ext4_freeze(struct super_block *sb) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4789 | { |
Takashi Sato | c4be0c1 | 2009-01-09 16:40:58 -0800 | [diff] [blame] | 4790 | int error = 0; |
| 4791 | journal_t *journal; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4792 | |
Theodore Ts'o | 9ca9238 | 2009-05-01 12:52:25 -0400 | [diff] [blame] | 4793 | if (sb->s_flags & MS_RDONLY) |
| 4794 | return 0; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4795 | |
Theodore Ts'o | 9ca9238 | 2009-05-01 12:52:25 -0400 | [diff] [blame] | 4796 | journal = EXT4_SB(sb)->s_journal; |
Hidehiro Kawai | 7ffe1ea | 2008-10-10 20:29:21 -0400 | [diff] [blame] | 4797 | |
Theodore Ts'o | bb04457 | 2014-09-18 17:12:02 -0400 | [diff] [blame] | 4798 | if (journal) { |
| 4799 | /* Now we set up the journal barrier. */ |
| 4800 | jbd2_journal_lock_updates(journal); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4801 | |
Theodore Ts'o | bb04457 | 2014-09-18 17:12:02 -0400 | [diff] [blame] | 4802 | /* |
| 4803 | * Don't clear the needs_recovery flag if we failed to |
| 4804 | * flush the journal. |
| 4805 | */ |
| 4806 | error = jbd2_journal_flush(journal); |
| 4807 | if (error < 0) |
| 4808 | goto out; |
| 4809 | } |
Theodore Ts'o | 9ca9238 | 2009-05-01 12:52:25 -0400 | [diff] [blame] | 4810 | |
| 4811 | /* Journal blocked and flushed, clear needs_recovery flag. */ |
| 4812 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
| 4813 | error = ext4_commit_super(sb, 1); |
Eric Sandeen | 6b0310f | 2010-05-16 02:00:00 -0400 | [diff] [blame] | 4814 | out: |
Theodore Ts'o | bb04457 | 2014-09-18 17:12:02 -0400 | [diff] [blame] | 4815 | if (journal) |
| 4816 | /* we rely on upper layer to stop further updates */ |
| 4817 | jbd2_journal_unlock_updates(journal); |
Eric Sandeen | 6b0310f | 2010-05-16 02:00:00 -0400 | [diff] [blame] | 4818 | return error; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4819 | } |
| 4820 | |
| 4821 | /* |
| 4822 | * Called by LVM after the snapshot is done. We need to reset the RECOVER |
| 4823 | * flag here, even though the filesystem is not technically dirty yet. |
| 4824 | */ |
Takashi Sato | c4be0c1 | 2009-01-09 16:40:58 -0800 | [diff] [blame] | 4825 | static int ext4_unfreeze(struct super_block *sb) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4826 | { |
Theodore Ts'o | 9ca9238 | 2009-05-01 12:52:25 -0400 | [diff] [blame] | 4827 | if (sb->s_flags & MS_RDONLY) |
| 4828 | return 0; |
| 4829 | |
Theodore Ts'o | 9ca9238 | 2009-05-01 12:52:25 -0400 | [diff] [blame] | 4830 | /* Reset the needs_recovery flag before the fs is unlocked. */ |
| 4831 | EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
| 4832 | ext4_commit_super(sb, 1); |
Takashi Sato | c4be0c1 | 2009-01-09 16:40:58 -0800 | [diff] [blame] | 4833 | return 0; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4834 | } |
| 4835 | |
Theodore Ts'o | 673c610 | 2010-12-15 20:28:48 -0500 | [diff] [blame] | 4836 | /* |
| 4837 | * Structure to save mount options for ext4_remount's benefit |
| 4838 | */ |
| 4839 | struct ext4_mount_options { |
| 4840 | unsigned long s_mount_opt; |
Theodore Ts'o | a2595b8 | 2010-12-15 20:30:48 -0500 | [diff] [blame] | 4841 | unsigned long s_mount_opt2; |
Eric W. Biederman | 08cefc7 | 2012-02-07 15:41:49 -0800 | [diff] [blame] | 4842 | kuid_t s_resuid; |
| 4843 | kgid_t s_resgid; |
Theodore Ts'o | 673c610 | 2010-12-15 20:28:48 -0500 | [diff] [blame] | 4844 | unsigned long s_commit_interval; |
| 4845 | u32 s_min_batch_time, s_max_batch_time; |
| 4846 | #ifdef CONFIG_QUOTA |
| 4847 | int s_jquota_fmt; |
Jan Kara | a2d4a64 | 2014-09-11 11:15:15 -0400 | [diff] [blame] | 4848 | char *s_qf_names[EXT4_MAXQUOTAS]; |
Theodore Ts'o | 673c610 | 2010-12-15 20:28:48 -0500 | [diff] [blame] | 4849 | #endif |
| 4850 | }; |
| 4851 | |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 4852 | static int ext4_remount(struct super_block *sb, int *flags, char *data) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4853 | { |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 4854 | struct ext4_super_block *es; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4855 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4856 | unsigned long old_sb_flags; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4857 | struct ext4_mount_options old_opts; |
Christoph Hellwig | c79d967 | 2010-05-19 07:16:40 -0400 | [diff] [blame] | 4858 | int enable_quota = 0; |
Theodore Ts'o | 8a26646 | 2008-07-26 14:34:21 -0400 | [diff] [blame] | 4859 | ext4_group_t g; |
Theodore Ts'o | b3881f7 | 2009-01-05 22:46:26 -0500 | [diff] [blame] | 4860 | unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; |
Johann Lombardi | c5e06d1 | 2011-05-24 18:31:25 -0400 | [diff] [blame] | 4861 | int err = 0; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4862 | #ifdef CONFIG_QUOTA |
Chen Gang | 03dafb5 | 2013-01-24 23:24:58 -0500 | [diff] [blame] | 4863 | int i, j; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4864 | #endif |
Curt Wohlgemuth | d4c402d | 2010-05-16 12:00:00 -0400 | [diff] [blame] | 4865 | char *orig_data = kstrdup(data, GFP_KERNEL); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4866 | |
| 4867 | /* Store the original options */ |
| 4868 | old_sb_flags = sb->s_flags; |
| 4869 | old_opts.s_mount_opt = sbi->s_mount_opt; |
Theodore Ts'o | a2595b8 | 2010-12-15 20:30:48 -0500 | [diff] [blame] | 4870 | old_opts.s_mount_opt2 = sbi->s_mount_opt2; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4871 | old_opts.s_resuid = sbi->s_resuid; |
| 4872 | old_opts.s_resgid = sbi->s_resgid; |
| 4873 | old_opts.s_commit_interval = sbi->s_commit_interval; |
Theodore Ts'o | 3077384 | 2009-01-03 20:27:38 -0500 | [diff] [blame] | 4874 | old_opts.s_min_batch_time = sbi->s_min_batch_time; |
| 4875 | old_opts.s_max_batch_time = sbi->s_max_batch_time; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4876 | #ifdef CONFIG_QUOTA |
| 4877 | old_opts.s_jquota_fmt = sbi->s_jquota_fmt; |
Jan Kara | a2d4a64 | 2014-09-11 11:15:15 -0400 | [diff] [blame] | 4878 | for (i = 0; i < EXT4_MAXQUOTAS; i++) |
Chen Gang | 03dafb5 | 2013-01-24 23:24:58 -0500 | [diff] [blame] | 4879 | if (sbi->s_qf_names[i]) { |
| 4880 | old_opts.s_qf_names[i] = kstrdup(sbi->s_qf_names[i], |
| 4881 | GFP_KERNEL); |
| 4882 | if (!old_opts.s_qf_names[i]) { |
| 4883 | for (j = 0; j < i; j++) |
| 4884 | kfree(old_opts.s_qf_names[j]); |
Wei Yongjun | 3e36a16 | 2013-03-02 17:13:55 -0500 | [diff] [blame] | 4885 | kfree(orig_data); |
Chen Gang | 03dafb5 | 2013-01-24 23:24:58 -0500 | [diff] [blame] | 4886 | return -ENOMEM; |
| 4887 | } |
| 4888 | } else |
| 4889 | old_opts.s_qf_names[i] = NULL; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4890 | #endif |
Theodore Ts'o | b3881f7 | 2009-01-05 22:46:26 -0500 | [diff] [blame] | 4891 | if (sbi->s_journal && sbi->s_journal->j_task->io_context) |
| 4892 | journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4893 | |
Eric Sandeen | 661aa52 | 2012-02-20 17:53:04 -0500 | [diff] [blame] | 4894 | if (!parse_options(data, sb, NULL, &journal_ioprio, 1)) { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4895 | err = -EINVAL; |
| 4896 | goto restore_opts; |
| 4897 | } |
| 4898 | |
Darrick J. Wong | 6b992ff | 2014-10-30 10:53:16 -0400 | [diff] [blame] | 4899 | if ((old_opts.s_mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) ^ |
| 4900 | test_opt(sb, JOURNAL_CHECKSUM)) { |
| 4901 | ext4_msg(sb, KERN_ERR, "changing journal_checksum " |
Eric Sandeen | 2d5b86e | 2015-02-12 23:07:37 -0500 | [diff] [blame] | 4902 | "during remount not supported; ignoring"); |
| 4903 | sbi->s_mount_opt ^= EXT4_MOUNT_JOURNAL_CHECKSUM; |
Darrick J. Wong | c6d3d56 | 2014-11-25 16:20:50 -0500 | [diff] [blame] | 4904 | } |
| 4905 | |
Piotr Sarna | 6ae6514 | 2013-08-08 23:02:24 -0400 | [diff] [blame] | 4906 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { |
| 4907 | if (test_opt2(sb, EXPLICIT_DELALLOC)) { |
| 4908 | ext4_msg(sb, KERN_ERR, "can't mount with " |
| 4909 | "both data=journal and delalloc"); |
| 4910 | err = -EINVAL; |
| 4911 | goto restore_opts; |
| 4912 | } |
| 4913 | if (test_opt(sb, DIOREAD_NOLOCK)) { |
| 4914 | ext4_msg(sb, KERN_ERR, "can't mount with " |
| 4915 | "both data=journal and dioread_nolock"); |
| 4916 | err = -EINVAL; |
| 4917 | goto restore_opts; |
| 4918 | } |
Ross Zwisler | 923ae0f | 2015-02-16 15:59:38 -0800 | [diff] [blame] | 4919 | if (test_opt(sb, DAX)) { |
| 4920 | ext4_msg(sb, KERN_ERR, "can't mount with " |
| 4921 | "both data=journal and dax"); |
| 4922 | err = -EINVAL; |
| 4923 | goto restore_opts; |
| 4924 | } |
| 4925 | } |
| 4926 | |
| 4927 | if ((sbi->s_mount_opt ^ old_opts.s_mount_opt) & EXT4_MOUNT_DAX) { |
| 4928 | ext4_msg(sb, KERN_WARNING, "warning: refusing change of " |
| 4929 | "dax flag with busy inodes while remounting"); |
| 4930 | sbi->s_mount_opt ^= EXT4_MOUNT_DAX; |
Piotr Sarna | 6ae6514 | 2013-08-08 23:02:24 -0400 | [diff] [blame] | 4931 | } |
| 4932 | |
Theodore Ts'o | 4ab2f15 | 2009-06-13 10:09:36 -0400 | [diff] [blame] | 4933 | if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) |
Theodore Ts'o | c67d859 | 2010-06-29 11:07:07 -0400 | [diff] [blame] | 4934 | ext4_abort(sb, "Abort forced by user"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4935 | |
| 4936 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | |
Dmitry Monakhov | 482a742 | 2010-02-24 11:35:32 -0500 | [diff] [blame] | 4937 | (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4938 | |
| 4939 | es = sbi->s_es; |
| 4940 | |
Theodore Ts'o | b3881f7 | 2009-01-05 22:46:26 -0500 | [diff] [blame] | 4941 | if (sbi->s_journal) { |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 4942 | ext4_init_journal_params(sb, sbi->s_journal); |
Theodore Ts'o | b3881f7 | 2009-01-05 22:46:26 -0500 | [diff] [blame] | 4943 | set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); |
| 4944 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4945 | |
Eric Sandeen | 661aa52 | 2012-02-20 17:53:04 -0500 | [diff] [blame] | 4946 | if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) { |
Theodore Ts'o | 4ab2f15 | 2009-06-13 10:09:36 -0400 | [diff] [blame] | 4947 | if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4948 | err = -EROFS; |
| 4949 | goto restore_opts; |
| 4950 | } |
| 4951 | |
| 4952 | if (*flags & MS_RDONLY) { |
Theodore Ts'o | 38c03b3 | 2014-03-13 22:49:42 -0400 | [diff] [blame] | 4953 | err = sync_filesystem(sb); |
| 4954 | if (err < 0) |
| 4955 | goto restore_opts; |
Christoph Hellwig | 0f0dd62 | 2010-05-19 07:16:41 -0400 | [diff] [blame] | 4956 | err = dquot_suspend(sb, -1); |
| 4957 | if (err < 0) |
Christoph Hellwig | c79d967 | 2010-05-19 07:16:40 -0400 | [diff] [blame] | 4958 | goto restore_opts; |
Christoph Hellwig | c79d967 | 2010-05-19 07:16:40 -0400 | [diff] [blame] | 4959 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4960 | /* |
| 4961 | * First of all, the unconditional stuff we have to do |
| 4962 | * to disable replay of the journal when we next remount |
| 4963 | */ |
| 4964 | sb->s_flags |= MS_RDONLY; |
| 4965 | |
| 4966 | /* |
| 4967 | * OK, test if we are remounting a valid rw partition |
| 4968 | * readonly, and if so set the rdonly flag and then |
| 4969 | * mark the partition as valid again. |
| 4970 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4971 | if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && |
| 4972 | (sbi->s_mount_state & EXT4_VALID_FS)) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4973 | es->s_state = cpu_to_le16(sbi->s_mount_state); |
| 4974 | |
Theodore Ts'o | a63c9eb | 2009-05-01 01:59:42 -0400 | [diff] [blame] | 4975 | if (sbi->s_journal) |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 4976 | ext4_mark_recovery_complete(sb, es); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4977 | } else { |
Eric Sandeen | a13fb1a | 2009-08-18 00:20:23 -0400 | [diff] [blame] | 4978 | /* Make sure we can mount this feature set readwrite */ |
Darrick J. Wong | 2cb5cc8 | 2015-02-12 22:31:21 -0500 | [diff] [blame] | 4979 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, |
| 4980 | EXT4_FEATURE_RO_COMPAT_READONLY) || |
| 4981 | !ext4_feature_set_ok(sb, 0)) { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4982 | err = -EROFS; |
| 4983 | goto restore_opts; |
| 4984 | } |
Eric Sandeen | ead6596 | 2007-02-10 01:46:08 -0800 | [diff] [blame] | 4985 | /* |
Theodore Ts'o | 8a26646 | 2008-07-26 14:34:21 -0400 | [diff] [blame] | 4986 | * Make sure the group descriptor checksums |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 4987 | * are sane. If they aren't, refuse to remount r/w. |
Theodore Ts'o | 8a26646 | 2008-07-26 14:34:21 -0400 | [diff] [blame] | 4988 | */ |
| 4989 | for (g = 0; g < sbi->s_groups_count; g++) { |
| 4990 | struct ext4_group_desc *gdp = |
| 4991 | ext4_get_group_desc(sb, g, NULL); |
| 4992 | |
Darrick J. Wong | feb0ab3 | 2012-04-29 18:45:10 -0400 | [diff] [blame] | 4993 | if (!ext4_group_desc_csum_verify(sb, g, gdp)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 4994 | ext4_msg(sb, KERN_ERR, |
| 4995 | "ext4_remount: Checksum for group %u failed (%u!=%u)", |
Theodore Ts'o | 8a26646 | 2008-07-26 14:34:21 -0400 | [diff] [blame] | 4996 | g, le16_to_cpu(ext4_group_desc_csum(sbi, g, gdp)), |
| 4997 | le16_to_cpu(gdp->bg_checksum)); |
| 4998 | err = -EINVAL; |
| 4999 | goto restore_opts; |
| 5000 | } |
| 5001 | } |
| 5002 | |
| 5003 | /* |
Eric Sandeen | ead6596 | 2007-02-10 01:46:08 -0800 | [diff] [blame] | 5004 | * If we have an unprocessed orphan list hanging |
| 5005 | * around from a previously readonly bdev mount, |
| 5006 | * require a full umount/remount for now. |
| 5007 | */ |
| 5008 | if (es->s_last_orphan) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 5009 | ext4_msg(sb, KERN_WARNING, "Couldn't " |
Eric Sandeen | ead6596 | 2007-02-10 01:46:08 -0800 | [diff] [blame] | 5010 | "remount RDWR because of unprocessed " |
| 5011 | "orphan inode list. Please " |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 5012 | "umount/remount instead"); |
Eric Sandeen | ead6596 | 2007-02-10 01:46:08 -0800 | [diff] [blame] | 5013 | err = -EINVAL; |
| 5014 | goto restore_opts; |
| 5015 | } |
| 5016 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5017 | /* |
| 5018 | * Mounting a RDONLY partition read-write, so reread |
| 5019 | * and store the current valid flag. (It may have |
| 5020 | * been changed by e2fsck since we originally mounted |
| 5021 | * the partition.) |
| 5022 | */ |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 5023 | if (sbi->s_journal) |
| 5024 | ext4_clear_journal_err(sb, es); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5025 | sbi->s_mount_state = le16_to_cpu(es->s_state); |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 5026 | if (!ext4_setup_super(sb, es, 0)) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5027 | sb->s_flags &= ~MS_RDONLY; |
Johann Lombardi | c5e06d1 | 2011-05-24 18:31:25 -0400 | [diff] [blame] | 5028 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, |
| 5029 | EXT4_FEATURE_INCOMPAT_MMP)) |
| 5030 | if (ext4_multi_mount_protect(sb, |
| 5031 | le64_to_cpu(es->s_mmp_block))) { |
| 5032 | err = -EROFS; |
| 5033 | goto restore_opts; |
| 5034 | } |
Christoph Hellwig | c79d967 | 2010-05-19 07:16:40 -0400 | [diff] [blame] | 5035 | enable_quota = 1; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5036 | } |
| 5037 | } |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 5038 | |
| 5039 | /* |
| 5040 | * Reinitialize lazy itable initialization thread based on |
| 5041 | * current settings |
| 5042 | */ |
| 5043 | if ((sb->s_flags & MS_RDONLY) || !test_opt(sb, INIT_INODE_TABLE)) |
| 5044 | ext4_unregister_li_request(sb); |
| 5045 | else { |
| 5046 | ext4_group_t first_not_zeroed; |
| 5047 | first_not_zeroed = ext4_has_uninit_itable(sb); |
| 5048 | ext4_register_li_request(sb, first_not_zeroed); |
| 5049 | } |
| 5050 | |
Theodore Ts'o | 6fd058f | 2009-05-17 15:38:01 -0400 | [diff] [blame] | 5051 | ext4_setup_system_zone(sb); |
Michael Tokarev | d096ad0 | 2012-12-25 14:08:16 -0500 | [diff] [blame] | 5052 | if (sbi->s_journal == NULL && !(old_sb_flags & MS_RDONLY)) |
Theodore Ts'o | e2d6705 | 2009-05-01 00:33:44 -0400 | [diff] [blame] | 5053 | ext4_commit_super(sb, 1); |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 5054 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5055 | #ifdef CONFIG_QUOTA |
| 5056 | /* Release old quota file names */ |
Jan Kara | a2d4a64 | 2014-09-11 11:15:15 -0400 | [diff] [blame] | 5057 | for (i = 0; i < EXT4_MAXQUOTAS; i++) |
Chen Gang | 03dafb5 | 2013-01-24 23:24:58 -0500 | [diff] [blame] | 5058 | kfree(old_opts.s_qf_names[i]); |
Aditya Kali | 7c319d3 | 2012-07-22 20:21:31 -0400 | [diff] [blame] | 5059 | if (enable_quota) { |
| 5060 | if (sb_any_quota_suspended(sb)) |
| 5061 | dquot_resume(sb, -1); |
| 5062 | else if (EXT4_HAS_RO_COMPAT_FEATURE(sb, |
| 5063 | EXT4_FEATURE_RO_COMPAT_QUOTA)) { |
| 5064 | err = ext4_enable_quotas(sb); |
Theodore Ts'o | 07724f9 | 2012-08-17 19:08:42 -0400 | [diff] [blame] | 5065 | if (err) |
Aditya Kali | 7c319d3 | 2012-07-22 20:21:31 -0400 | [diff] [blame] | 5066 | goto restore_opts; |
Aditya Kali | 7c319d3 | 2012-07-22 20:21:31 -0400 | [diff] [blame] | 5067 | } |
| 5068 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5069 | #endif |
Curt Wohlgemuth | d4c402d | 2010-05-16 12:00:00 -0400 | [diff] [blame] | 5070 | |
Theodore Ts'o | a26f499 | 2015-02-02 00:37:02 -0500 | [diff] [blame] | 5071 | *flags = (*flags & ~MS_LAZYTIME) | (sb->s_flags & MS_LAZYTIME); |
Curt Wohlgemuth | d4c402d | 2010-05-16 12:00:00 -0400 | [diff] [blame] | 5072 | ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s", orig_data); |
| 5073 | kfree(orig_data); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5074 | return 0; |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 5075 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5076 | restore_opts: |
| 5077 | sb->s_flags = old_sb_flags; |
| 5078 | sbi->s_mount_opt = old_opts.s_mount_opt; |
Theodore Ts'o | a2595b8 | 2010-12-15 20:30:48 -0500 | [diff] [blame] | 5079 | sbi->s_mount_opt2 = old_opts.s_mount_opt2; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5080 | sbi->s_resuid = old_opts.s_resuid; |
| 5081 | sbi->s_resgid = old_opts.s_resgid; |
| 5082 | sbi->s_commit_interval = old_opts.s_commit_interval; |
Theodore Ts'o | 3077384 | 2009-01-03 20:27:38 -0500 | [diff] [blame] | 5083 | sbi->s_min_batch_time = old_opts.s_min_batch_time; |
| 5084 | sbi->s_max_batch_time = old_opts.s_max_batch_time; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5085 | #ifdef CONFIG_QUOTA |
| 5086 | sbi->s_jquota_fmt = old_opts.s_jquota_fmt; |
Jan Kara | a2d4a64 | 2014-09-11 11:15:15 -0400 | [diff] [blame] | 5087 | for (i = 0; i < EXT4_MAXQUOTAS; i++) { |
Chen Gang | 03dafb5 | 2013-01-24 23:24:58 -0500 | [diff] [blame] | 5088 | kfree(sbi->s_qf_names[i]); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5089 | sbi->s_qf_names[i] = old_opts.s_qf_names[i]; |
| 5090 | } |
| 5091 | #endif |
Curt Wohlgemuth | d4c402d | 2010-05-16 12:00:00 -0400 | [diff] [blame] | 5092 | kfree(orig_data); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5093 | return err; |
| 5094 | } |
| 5095 | |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 5096 | static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5097 | { |
| 5098 | struct super_block *sb = dentry->d_sb; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 5099 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
| 5100 | struct ext4_super_block *es = sbi->s_es; |
Lukas Czerner | 27dd438 | 2013-04-09 22:11:22 -0400 | [diff] [blame] | 5101 | ext4_fsblk_t overhead = 0, resv_blocks; |
Pekka Enberg | 960cc39 | 2006-12-06 20:35:29 -0800 | [diff] [blame] | 5102 | u64 fsid; |
Kazuya Mio | d02a939 | 2011-05-24 18:30:07 -0400 | [diff] [blame] | 5103 | s64 bfree; |
Lukas Czerner | 27dd438 | 2013-04-09 22:11:22 -0400 | [diff] [blame] | 5104 | resv_blocks = EXT4_C2B(sbi, atomic64_read(&sbi->s_resv_clusters)); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5105 | |
Theodore Ts'o | 952fc18 | 2012-07-09 16:27:05 -0400 | [diff] [blame] | 5106 | if (!test_opt(sb, MINIX_DF)) |
| 5107 | overhead = sbi->s_overhead; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5108 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 5109 | buf->f_type = EXT4_SUPER_MAGIC; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5110 | buf->f_bsize = sb->s_blocksize; |
Eric Sandeen | b72f78c | 2012-11-08 10:33:36 -0500 | [diff] [blame] | 5111 | buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, overhead); |
Theodore Ts'o | 5704265 | 2011-09-09 18:56:51 -0400 | [diff] [blame] | 5112 | bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) - |
| 5113 | percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter); |
Kazuya Mio | d02a939 | 2011-05-24 18:30:07 -0400 | [diff] [blame] | 5114 | /* prevent underflow in case that few free space is available */ |
Theodore Ts'o | 5704265 | 2011-09-09 18:56:51 -0400 | [diff] [blame] | 5115 | buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0)); |
Lukas Czerner | 27dd438 | 2013-04-09 22:11:22 -0400 | [diff] [blame] | 5116 | buf->f_bavail = buf->f_bfree - |
| 5117 | (ext4_r_blocks_count(es) + resv_blocks); |
| 5118 | if (buf->f_bfree < (ext4_r_blocks_count(es) + resv_blocks)) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5119 | buf->f_bavail = 0; |
| 5120 | buf->f_files = le32_to_cpu(es->s_inodes_count); |
Peter Zijlstra | 52d9f3b | 2007-10-16 23:25:44 -0700 | [diff] [blame] | 5121 | buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 5122 | buf->f_namelen = EXT4_NAME_LEN; |
Pekka Enberg | 960cc39 | 2006-12-06 20:35:29 -0800 | [diff] [blame] | 5123 | fsid = le64_to_cpup((void *)es->s_uuid) ^ |
| 5124 | le64_to_cpup((void *)es->s_uuid + sizeof(u64)); |
| 5125 | buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; |
| 5126 | buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 5127 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5128 | return 0; |
| 5129 | } |
| 5130 | |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 5131 | /* Helper function for writing quotas on sync - we need to start transaction |
| 5132 | * before quota file is locked for write. Otherwise the are possible deadlocks: |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5133 | * Process 1 Process 2 |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 5134 | * ext4_create() quota_sync() |
Jan Kara | a269eb1 | 2009-01-26 17:04:39 +0100 | [diff] [blame] | 5135 | * jbd2_journal_start() write_dquot() |
Christoph Hellwig | 871a293 | 2010-03-03 09:05:07 -0500 | [diff] [blame] | 5136 | * dquot_initialize() down(dqio_mutex) |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 5137 | * down(dqio_mutex) jbd2_journal_start() |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5138 | * |
| 5139 | */ |
| 5140 | |
| 5141 | #ifdef CONFIG_QUOTA |
| 5142 | |
| 5143 | static inline struct inode *dquot_to_inode(struct dquot *dquot) |
| 5144 | { |
Eric W. Biederman | 4c376dc | 2012-09-16 03:56:19 -0700 | [diff] [blame] | 5145 | return sb_dqopt(dquot->dq_sb)->files[dquot->dq_id.type]; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5146 | } |
| 5147 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 5148 | static int ext4_write_dquot(struct dquot *dquot) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5149 | { |
| 5150 | int ret, err; |
| 5151 | handle_t *handle; |
| 5152 | struct inode *inode; |
| 5153 | |
| 5154 | inode = dquot_to_inode(dquot); |
Theodore Ts'o | 9924a92 | 2013-02-08 21:59:22 -0500 | [diff] [blame] | 5155 | handle = ext4_journal_start(inode, EXT4_HT_QUOTA, |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 5156 | EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5157 | if (IS_ERR(handle)) |
| 5158 | return PTR_ERR(handle); |
| 5159 | ret = dquot_commit(dquot); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 5160 | err = ext4_journal_stop(handle); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5161 | if (!ret) |
| 5162 | ret = err; |
| 5163 | return ret; |
| 5164 | } |
| 5165 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 5166 | static int ext4_acquire_dquot(struct dquot *dquot) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5167 | { |
| 5168 | int ret, err; |
| 5169 | handle_t *handle; |
| 5170 | |
Theodore Ts'o | 9924a92 | 2013-02-08 21:59:22 -0500 | [diff] [blame] | 5171 | handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 5172 | EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5173 | if (IS_ERR(handle)) |
| 5174 | return PTR_ERR(handle); |
| 5175 | ret = dquot_acquire(dquot); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 5176 | err = ext4_journal_stop(handle); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5177 | if (!ret) |
| 5178 | ret = err; |
| 5179 | return ret; |
| 5180 | } |
| 5181 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 5182 | static int ext4_release_dquot(struct dquot *dquot) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5183 | { |
| 5184 | int ret, err; |
| 5185 | handle_t *handle; |
| 5186 | |
Theodore Ts'o | 9924a92 | 2013-02-08 21:59:22 -0500 | [diff] [blame] | 5187 | handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 5188 | EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); |
Jan Kara | 9c3013e | 2007-09-11 15:23:29 -0700 | [diff] [blame] | 5189 | if (IS_ERR(handle)) { |
| 5190 | /* Release dquot anyway to avoid endless cycle in dqput() */ |
| 5191 | dquot_release(dquot); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5192 | return PTR_ERR(handle); |
Jan Kara | 9c3013e | 2007-09-11 15:23:29 -0700 | [diff] [blame] | 5193 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5194 | ret = dquot_release(dquot); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 5195 | err = ext4_journal_stop(handle); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5196 | if (!ret) |
| 5197 | ret = err; |
| 5198 | return ret; |
| 5199 | } |
| 5200 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 5201 | static int ext4_mark_dquot_dirty(struct dquot *dquot) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5202 | { |
Jan Kara | 262b466 | 2013-03-02 17:57:08 -0500 | [diff] [blame] | 5203 | struct super_block *sb = dquot->dq_sb; |
| 5204 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
| 5205 | |
Jan Kara | 2c8be6b | 2008-05-13 21:27:55 -0400 | [diff] [blame] | 5206 | /* Are we journaling quotas? */ |
Jan Kara | 262b466 | 2013-03-02 17:57:08 -0500 | [diff] [blame] | 5207 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) || |
| 5208 | sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5209 | dquot_mark_dquot_dirty(dquot); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 5210 | return ext4_write_dquot(dquot); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5211 | } else { |
| 5212 | return dquot_mark_dquot_dirty(dquot); |
| 5213 | } |
| 5214 | } |
| 5215 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 5216 | static int ext4_write_info(struct super_block *sb, int type) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5217 | { |
| 5218 | int ret, err; |
| 5219 | handle_t *handle; |
| 5220 | |
| 5221 | /* Data block + inode block */ |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 5222 | handle = ext4_journal_start(d_inode(sb->s_root), EXT4_HT_QUOTA, 2); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5223 | if (IS_ERR(handle)) |
| 5224 | return PTR_ERR(handle); |
| 5225 | ret = dquot_commit_info(sb, type); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 5226 | err = ext4_journal_stop(handle); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5227 | if (!ret) |
| 5228 | ret = err; |
| 5229 | return ret; |
| 5230 | } |
| 5231 | |
| 5232 | /* |
| 5233 | * Turn on quotas during mount time - we need to find |
| 5234 | * the quota file and such... |
| 5235 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 5236 | static int ext4_quota_on_mount(struct super_block *sb, int type) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5237 | { |
Christoph Hellwig | 287a809 | 2010-05-19 07:16:45 -0400 | [diff] [blame] | 5238 | return dquot_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], |
| 5239 | EXT4_SB(sb)->s_jquota_fmt, type); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5240 | } |
| 5241 | |
| 5242 | /* |
| 5243 | * Standard function to be called on quota_on |
| 5244 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 5245 | static int ext4_quota_on(struct super_block *sb, int type, int format_id, |
Jan Kara | f00c9e4 | 2010-09-15 17:38:58 +0200 | [diff] [blame] | 5246 | struct path *path) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5247 | { |
| 5248 | int err; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5249 | |
| 5250 | if (!test_opt(sb, QUOTA)) |
| 5251 | return -EINVAL; |
Jan Kara | 0623543 | 2008-05-13 19:11:51 -0400 | [diff] [blame] | 5252 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5253 | /* Quotafile not on the same filesystem? */ |
Al Viro | d8c9584 | 2011-12-07 18:16:57 -0500 | [diff] [blame] | 5254 | if (path->dentry->d_sb != sb) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5255 | return -EXDEV; |
Jan Kara | 0623543 | 2008-05-13 19:11:51 -0400 | [diff] [blame] | 5256 | /* Journaling quota? */ |
| 5257 | if (EXT4_SB(sb)->s_qf_names[type]) { |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 5258 | /* Quotafile not in fs root? */ |
Jan Kara | f00c9e4 | 2010-09-15 17:38:58 +0200 | [diff] [blame] | 5259 | if (path->dentry->d_parent != sb->s_root) |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 5260 | ext4_msg(sb, KERN_WARNING, |
| 5261 | "Quota file not on filesystem root. " |
| 5262 | "Journaled quota will not work"); |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 5263 | } |
Jan Kara | 0623543 | 2008-05-13 19:11:51 -0400 | [diff] [blame] | 5264 | |
| 5265 | /* |
| 5266 | * When we journal data on quota file, we have to flush journal to see |
| 5267 | * all updates to the file when we bypass pagecache... |
| 5268 | */ |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 5269 | if (EXT4_SB(sb)->s_journal && |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 5270 | ext4_should_journal_data(d_inode(path->dentry))) { |
Jan Kara | 0623543 | 2008-05-13 19:11:51 -0400 | [diff] [blame] | 5271 | /* |
| 5272 | * We don't need to lock updates but journal_flush() could |
| 5273 | * otherwise be livelocked... |
| 5274 | */ |
| 5275 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); |
Hidehiro Kawai | 7ffe1ea | 2008-10-10 20:29:21 -0400 | [diff] [blame] | 5276 | err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); |
Jan Kara | 0623543 | 2008-05-13 19:11:51 -0400 | [diff] [blame] | 5277 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); |
Jan Kara | f00c9e4 | 2010-09-15 17:38:58 +0200 | [diff] [blame] | 5278 | if (err) |
Hidehiro Kawai | 7ffe1ea | 2008-10-10 20:29:21 -0400 | [diff] [blame] | 5279 | return err; |
Jan Kara | 0623543 | 2008-05-13 19:11:51 -0400 | [diff] [blame] | 5280 | } |
| 5281 | |
Jan Kara | f00c9e4 | 2010-09-15 17:38:58 +0200 | [diff] [blame] | 5282 | return dquot_quota_on(sb, type, format_id, path); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5283 | } |
| 5284 | |
Aditya Kali | 7c319d3 | 2012-07-22 20:21:31 -0400 | [diff] [blame] | 5285 | static int ext4_quota_enable(struct super_block *sb, int type, int format_id, |
| 5286 | unsigned int flags) |
| 5287 | { |
| 5288 | int err; |
| 5289 | struct inode *qf_inode; |
Jan Kara | a2d4a64 | 2014-09-11 11:15:15 -0400 | [diff] [blame] | 5290 | unsigned long qf_inums[EXT4_MAXQUOTAS] = { |
Aditya Kali | 7c319d3 | 2012-07-22 20:21:31 -0400 | [diff] [blame] | 5291 | le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), |
| 5292 | le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum) |
| 5293 | }; |
| 5294 | |
| 5295 | BUG_ON(!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)); |
| 5296 | |
| 5297 | if (!qf_inums[type]) |
| 5298 | return -EPERM; |
| 5299 | |
| 5300 | qf_inode = ext4_iget(sb, qf_inums[type]); |
| 5301 | if (IS_ERR(qf_inode)) { |
| 5302 | ext4_error(sb, "Bad quota inode # %lu", qf_inums[type]); |
| 5303 | return PTR_ERR(qf_inode); |
| 5304 | } |
| 5305 | |
Jan Kara | bcb1385 | 2013-04-09 09:21:41 -0400 | [diff] [blame] | 5306 | /* Don't account quota for quota files to avoid recursion */ |
| 5307 | qf_inode->i_flags |= S_NOQUOTA; |
Aditya Kali | 7c319d3 | 2012-07-22 20:21:31 -0400 | [diff] [blame] | 5308 | err = dquot_enable(qf_inode, type, format_id, flags); |
| 5309 | iput(qf_inode); |
| 5310 | |
| 5311 | return err; |
| 5312 | } |
| 5313 | |
| 5314 | /* Enable usage tracking for all quota types. */ |
| 5315 | static int ext4_enable_quotas(struct super_block *sb) |
| 5316 | { |
| 5317 | int type, err = 0; |
Jan Kara | a2d4a64 | 2014-09-11 11:15:15 -0400 | [diff] [blame] | 5318 | unsigned long qf_inums[EXT4_MAXQUOTAS] = { |
Aditya Kali | 7c319d3 | 2012-07-22 20:21:31 -0400 | [diff] [blame] | 5319 | le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), |
| 5320 | le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum) |
| 5321 | }; |
| 5322 | |
| 5323 | sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE; |
Jan Kara | a2d4a64 | 2014-09-11 11:15:15 -0400 | [diff] [blame] | 5324 | for (type = 0; type < EXT4_MAXQUOTAS; type++) { |
Aditya Kali | 7c319d3 | 2012-07-22 20:21:31 -0400 | [diff] [blame] | 5325 | if (qf_inums[type]) { |
| 5326 | err = ext4_quota_enable(sb, type, QFMT_VFS_V1, |
| 5327 | DQUOT_USAGE_ENABLED); |
| 5328 | if (err) { |
| 5329 | ext4_warning(sb, |
Theodore Ts'o | 72ba745 | 2013-01-24 23:24:54 -0500 | [diff] [blame] | 5330 | "Failed to enable quota tracking " |
| 5331 | "(type=%d, err=%d). Please run " |
| 5332 | "e2fsck to fix.", type, err); |
Aditya Kali | 7c319d3 | 2012-07-22 20:21:31 -0400 | [diff] [blame] | 5333 | return err; |
| 5334 | } |
| 5335 | } |
| 5336 | } |
| 5337 | return 0; |
| 5338 | } |
| 5339 | |
Dmitry Monakhov | ca0e05e | 2010-08-01 17:48:36 -0400 | [diff] [blame] | 5340 | static int ext4_quota_off(struct super_block *sb, int type) |
| 5341 | { |
Jan Kara | 21f9769 | 2011-04-04 15:33:39 -0400 | [diff] [blame] | 5342 | struct inode *inode = sb_dqopt(sb)->files[type]; |
| 5343 | handle_t *handle; |
| 5344 | |
Dmitry Monakhov | 87009d8 | 2010-11-08 13:47:33 -0500 | [diff] [blame] | 5345 | /* Force all delayed allocation blocks to be allocated. |
| 5346 | * Caller already holds s_umount sem */ |
| 5347 | if (test_opt(sb, DELALLOC)) |
Dmitry Monakhov | ca0e05e | 2010-08-01 17:48:36 -0400 | [diff] [blame] | 5348 | sync_filesystem(sb); |
Dmitry Monakhov | ca0e05e | 2010-08-01 17:48:36 -0400 | [diff] [blame] | 5349 | |
Amir Goldstein | 0b26859 | 2011-05-16 09:59:13 -0400 | [diff] [blame] | 5350 | if (!inode) |
| 5351 | goto out; |
| 5352 | |
Jan Kara | 21f9769 | 2011-04-04 15:33:39 -0400 | [diff] [blame] | 5353 | /* Update modification times of quota files when userspace can |
| 5354 | * start looking at them */ |
Theodore Ts'o | 9924a92 | 2013-02-08 21:59:22 -0500 | [diff] [blame] | 5355 | handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); |
Jan Kara | 21f9769 | 2011-04-04 15:33:39 -0400 | [diff] [blame] | 5356 | if (IS_ERR(handle)) |
| 5357 | goto out; |
| 5358 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; |
| 5359 | ext4_mark_inode_dirty(handle, inode); |
| 5360 | ext4_journal_stop(handle); |
| 5361 | |
| 5362 | out: |
Dmitry Monakhov | ca0e05e | 2010-08-01 17:48:36 -0400 | [diff] [blame] | 5363 | return dquot_quota_off(sb, type); |
| 5364 | } |
| 5365 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5366 | /* Read data from quotafile - avoid pagecache and such because we cannot afford |
| 5367 | * acquiring the locks... As quota files are never truncated and quota code |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 5368 | * itself serializes the operations (and no one else should touch the files) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5369 | * we don't have to be afraid of races */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 5370 | static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5371 | size_t len, loff_t off) |
| 5372 | { |
| 5373 | struct inode *inode = sb_dqopt(sb)->files[type]; |
Aneesh Kumar K.V | 725d26d | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 5374 | ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5375 | int offset = off & (sb->s_blocksize - 1); |
| 5376 | int tocopy; |
| 5377 | size_t toread; |
| 5378 | struct buffer_head *bh; |
| 5379 | loff_t i_size = i_size_read(inode); |
| 5380 | |
| 5381 | if (off > i_size) |
| 5382 | return 0; |
| 5383 | if (off+len > i_size) |
| 5384 | len = i_size-off; |
| 5385 | toread = len; |
| 5386 | while (toread > 0) { |
| 5387 | tocopy = sb->s_blocksize - offset < toread ? |
| 5388 | sb->s_blocksize - offset : toread; |
Theodore Ts'o | 1c21502 | 2014-08-29 20:52:15 -0400 | [diff] [blame] | 5389 | bh = ext4_bread(NULL, inode, blk, 0); |
| 5390 | if (IS_ERR(bh)) |
| 5391 | return PTR_ERR(bh); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5392 | if (!bh) /* A hole? */ |
| 5393 | memset(data, 0, tocopy); |
| 5394 | else |
| 5395 | memcpy(data, bh->b_data+offset, tocopy); |
| 5396 | brelse(bh); |
| 5397 | offset = 0; |
| 5398 | toread -= tocopy; |
| 5399 | data += tocopy; |
| 5400 | blk++; |
| 5401 | } |
| 5402 | return len; |
| 5403 | } |
| 5404 | |
| 5405 | /* Write to quotafile (we know the transaction is already started and has |
| 5406 | * enough credits) */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 5407 | static ssize_t ext4_quota_write(struct super_block *sb, int type, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5408 | const char *data, size_t len, loff_t off) |
| 5409 | { |
| 5410 | struct inode *inode = sb_dqopt(sb)->files[type]; |
Aneesh Kumar K.V | 725d26d | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 5411 | ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); |
Theodore Ts'o | 1c21502 | 2014-08-29 20:52:15 -0400 | [diff] [blame] | 5412 | int err, offset = off & (sb->s_blocksize - 1); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5413 | struct buffer_head *bh; |
| 5414 | handle_t *handle = journal_current_handle(); |
| 5415 | |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 5416 | if (EXT4_SB(sb)->s_journal && !handle) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 5417 | ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" |
| 5418 | " cancelled because transaction is not started", |
Jan Kara | 9c3013e | 2007-09-11 15:23:29 -0700 | [diff] [blame] | 5419 | (unsigned long long)off, (unsigned long long)len); |
| 5420 | return -EIO; |
| 5421 | } |
Dmitry Monakhov | 67eeb56 | 2010-03-02 08:08:51 -0500 | [diff] [blame] | 5422 | /* |
| 5423 | * Since we account only one data block in transaction credits, |
| 5424 | * then it is impossible to cross a block boundary. |
| 5425 | */ |
| 5426 | if (sb->s_blocksize - offset < len) { |
| 5427 | ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" |
| 5428 | " cancelled because not block aligned", |
| 5429 | (unsigned long long)off, (unsigned long long)len); |
| 5430 | return -EIO; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5431 | } |
Dmitry Monakhov | 67eeb56 | 2010-03-02 08:08:51 -0500 | [diff] [blame] | 5432 | |
Theodore Ts'o | 1c21502 | 2014-08-29 20:52:15 -0400 | [diff] [blame] | 5433 | bh = ext4_bread(handle, inode, blk, 1); |
| 5434 | if (IS_ERR(bh)) |
| 5435 | return PTR_ERR(bh); |
Dmitry Monakhov | 67eeb56 | 2010-03-02 08:08:51 -0500 | [diff] [blame] | 5436 | if (!bh) |
| 5437 | goto out; |
liang xie | 5d60125 | 2014-05-12 22:06:43 -0400 | [diff] [blame] | 5438 | BUFFER_TRACE(bh, "get write access"); |
Jan Kara | 62d2b5f | 2010-07-27 11:56:07 -0400 | [diff] [blame] | 5439 | err = ext4_journal_get_write_access(handle, bh); |
| 5440 | if (err) { |
| 5441 | brelse(bh); |
Theodore Ts'o | 1c21502 | 2014-08-29 20:52:15 -0400 | [diff] [blame] | 5442 | return err; |
Dmitry Monakhov | 67eeb56 | 2010-03-02 08:08:51 -0500 | [diff] [blame] | 5443 | } |
| 5444 | lock_buffer(bh); |
| 5445 | memcpy(bh->b_data+offset, data, len); |
| 5446 | flush_dcache_page(bh->b_page); |
| 5447 | unlock_buffer(bh); |
Jan Kara | 62d2b5f | 2010-07-27 11:56:07 -0400 | [diff] [blame] | 5448 | err = ext4_handle_dirty_metadata(handle, NULL, bh); |
Dmitry Monakhov | 67eeb56 | 2010-03-02 08:08:51 -0500 | [diff] [blame] | 5449 | brelse(bh); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5450 | out: |
Dmitry Monakhov | 67eeb56 | 2010-03-02 08:08:51 -0500 | [diff] [blame] | 5451 | if (inode->i_size < off + len) { |
| 5452 | i_size_write(inode, off + len); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 5453 | EXT4_I(inode)->i_disksize = inode->i_size; |
Jan Kara | 21f9769 | 2011-04-04 15:33:39 -0400 | [diff] [blame] | 5454 | ext4_mark_inode_dirty(handle, inode); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5455 | } |
Dmitry Monakhov | 67eeb56 | 2010-03-02 08:08:51 -0500 | [diff] [blame] | 5456 | return len; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5457 | } |
| 5458 | |
| 5459 | #endif |
| 5460 | |
Al Viro | 152a083 | 2010-07-25 00:46:55 +0400 | [diff] [blame] | 5461 | static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, |
| 5462 | const char *dev_name, void *data) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5463 | { |
Al Viro | 152a083 | 2010-07-25 00:46:55 +0400 | [diff] [blame] | 5464 | return mount_bdev(fs_type, flags, dev_name, data, ext4_fill_super); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5465 | } |
| 5466 | |
Theodore Ts'o | 37f328e | 2010-03-24 20:06:41 -0400 | [diff] [blame] | 5467 | #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) |
Theodore Ts'o | 24b5842 | 2009-12-07 14:08:51 -0500 | [diff] [blame] | 5468 | static inline void register_as_ext2(void) |
| 5469 | { |
| 5470 | int err = register_filesystem(&ext2_fs_type); |
| 5471 | if (err) |
| 5472 | printk(KERN_WARNING |
| 5473 | "EXT4-fs: Unable to register as ext2 (%d)\n", err); |
| 5474 | } |
| 5475 | |
| 5476 | static inline void unregister_as_ext2(void) |
| 5477 | { |
| 5478 | unregister_filesystem(&ext2_fs_type); |
| 5479 | } |
Theodore Ts'o | 2035e77 | 2011-04-18 17:29:14 -0400 | [diff] [blame] | 5480 | |
| 5481 | static inline int ext2_feature_set_ok(struct super_block *sb) |
| 5482 | { |
| 5483 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT2_FEATURE_INCOMPAT_SUPP)) |
| 5484 | return 0; |
| 5485 | if (sb->s_flags & MS_RDONLY) |
| 5486 | return 1; |
| 5487 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT2_FEATURE_RO_COMPAT_SUPP)) |
| 5488 | return 0; |
| 5489 | return 1; |
| 5490 | } |
Theodore Ts'o | 24b5842 | 2009-12-07 14:08:51 -0500 | [diff] [blame] | 5491 | #else |
| 5492 | static inline void register_as_ext2(void) { } |
| 5493 | static inline void unregister_as_ext2(void) { } |
Theodore Ts'o | 2035e77 | 2011-04-18 17:29:14 -0400 | [diff] [blame] | 5494 | static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; } |
Theodore Ts'o | 24b5842 | 2009-12-07 14:08:51 -0500 | [diff] [blame] | 5495 | #endif |
| 5496 | |
Theodore Ts'o | 37f328e | 2010-03-24 20:06:41 -0400 | [diff] [blame] | 5497 | #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) |
Theodore Ts'o | 24b5842 | 2009-12-07 14:08:51 -0500 | [diff] [blame] | 5498 | static inline void register_as_ext3(void) |
| 5499 | { |
| 5500 | int err = register_filesystem(&ext3_fs_type); |
| 5501 | if (err) |
| 5502 | printk(KERN_WARNING |
| 5503 | "EXT4-fs: Unable to register as ext3 (%d)\n", err); |
| 5504 | } |
| 5505 | |
| 5506 | static inline void unregister_as_ext3(void) |
| 5507 | { |
| 5508 | unregister_filesystem(&ext3_fs_type); |
| 5509 | } |
Theodore Ts'o | 2035e77 | 2011-04-18 17:29:14 -0400 | [diff] [blame] | 5510 | |
| 5511 | static inline int ext3_feature_set_ok(struct super_block *sb) |
| 5512 | { |
| 5513 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT3_FEATURE_INCOMPAT_SUPP)) |
| 5514 | return 0; |
| 5515 | if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) |
| 5516 | return 0; |
| 5517 | if (sb->s_flags & MS_RDONLY) |
| 5518 | return 1; |
| 5519 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT3_FEATURE_RO_COMPAT_SUPP)) |
| 5520 | return 0; |
| 5521 | return 1; |
| 5522 | } |
Theodore Ts'o | 24b5842 | 2009-12-07 14:08:51 -0500 | [diff] [blame] | 5523 | #else |
| 5524 | static inline void register_as_ext3(void) { } |
| 5525 | static inline void unregister_as_ext3(void) { } |
Theodore Ts'o | 2035e77 | 2011-04-18 17:29:14 -0400 | [diff] [blame] | 5526 | static inline int ext3_feature_set_ok(struct super_block *sb) { return 0; } |
Theodore Ts'o | 24b5842 | 2009-12-07 14:08:51 -0500 | [diff] [blame] | 5527 | #endif |
| 5528 | |
Theodore Ts'o | 03010a3 | 2008-10-10 20:02:48 -0400 | [diff] [blame] | 5529 | static struct file_system_type ext4_fs_type = { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5530 | .owner = THIS_MODULE, |
Theodore Ts'o | 03010a3 | 2008-10-10 20:02:48 -0400 | [diff] [blame] | 5531 | .name = "ext4", |
Al Viro | 152a083 | 2010-07-25 00:46:55 +0400 | [diff] [blame] | 5532 | .mount = ext4_mount, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5533 | .kill_sb = kill_block_super, |
| 5534 | .fs_flags = FS_REQUIRES_DEV, |
| 5535 | }; |
Eric W. Biederman | 7f78e03 | 2013-03-02 19:39:14 -0800 | [diff] [blame] | 5536 | MODULE_ALIAS_FS("ext4"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5537 | |
Lukas Czerner | 8f02122 | 2011-02-03 14:33:33 -0500 | [diff] [blame] | 5538 | static int __init ext4_init_feat_adverts(void) |
Lukas Czerner | 857ac88 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 5539 | { |
| 5540 | struct ext4_features *ef; |
| 5541 | int ret = -ENOMEM; |
| 5542 | |
| 5543 | ef = kzalloc(sizeof(struct ext4_features), GFP_KERNEL); |
| 5544 | if (!ef) |
| 5545 | goto out; |
| 5546 | |
| 5547 | ef->f_kobj.kset = ext4_kset; |
| 5548 | init_completion(&ef->f_kobj_unregister); |
| 5549 | ret = kobject_init_and_add(&ef->f_kobj, &ext4_feat_ktype, NULL, |
| 5550 | "features"); |
| 5551 | if (ret) { |
| 5552 | kfree(ef); |
| 5553 | goto out; |
| 5554 | } |
| 5555 | |
| 5556 | ext4_feat = ef; |
| 5557 | ret = 0; |
| 5558 | out: |
| 5559 | return ret; |
| 5560 | } |
| 5561 | |
Lukas Czerner | 8f02122 | 2011-02-03 14:33:33 -0500 | [diff] [blame] | 5562 | static void ext4_exit_feat_adverts(void) |
| 5563 | { |
| 5564 | kobject_put(&ext4_feat->f_kobj); |
| 5565 | wait_for_completion(&ext4_feat->f_kobj_unregister); |
| 5566 | kfree(ext4_feat); |
| 5567 | } |
| 5568 | |
Eric Sandeen | e9e3bce | 2011-02-12 08:17:34 -0500 | [diff] [blame] | 5569 | /* Shared across all ext4 file systems */ |
| 5570 | wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; |
| 5571 | struct mutex ext4__aio_mutex[EXT4_WQ_HASH_SZ]; |
| 5572 | |
Theodore Ts'o | 5dabfc7 | 2010-10-27 21:30:14 -0400 | [diff] [blame] | 5573 | static int __init ext4_init_fs(void) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5574 | { |
Eric Sandeen | e9e3bce | 2011-02-12 08:17:34 -0500 | [diff] [blame] | 5575 | int i, err; |
Alex Tomas | c9de560 | 2008-01-29 00:19:52 -0500 | [diff] [blame] | 5576 | |
Al Viro | 07c0c5d8 | 2012-03-20 22:05:02 -0400 | [diff] [blame] | 5577 | ext4_li_info = NULL; |
| 5578 | mutex_init(&ext4_li_mtx); |
| 5579 | |
Carlos Maiolino | 9a4c801 | 2012-12-10 16:30:45 -0500 | [diff] [blame] | 5580 | /* Build-time check for flags consistency */ |
Dmitry Monakhov | 12e9b89 | 2010-05-16 22:00:00 -0400 | [diff] [blame] | 5581 | ext4_check_flag_values(); |
Eric Sandeen | e9e3bce | 2011-02-12 08:17:34 -0500 | [diff] [blame] | 5582 | |
| 5583 | for (i = 0; i < EXT4_WQ_HASH_SZ; i++) { |
| 5584 | mutex_init(&ext4__aio_mutex[i]); |
| 5585 | init_waitqueue_head(&ext4__ioend_wq[i]); |
| 5586 | } |
| 5587 | |
Zheng Liu | 51865fd | 2012-11-08 21:57:32 -0500 | [diff] [blame] | 5588 | err = ext4_init_es(); |
Theodore Ts'o | 6fd058f | 2009-05-17 15:38:01 -0400 | [diff] [blame] | 5589 | if (err) |
| 5590 | return err; |
Zheng Liu | 51865fd | 2012-11-08 21:57:32 -0500 | [diff] [blame] | 5591 | |
| 5592 | err = ext4_init_pageio(); |
| 5593 | if (err) |
| 5594 | goto out7; |
| 5595 | |
Theodore Ts'o | 5dabfc7 | 2010-10-27 21:30:14 -0400 | [diff] [blame] | 5596 | err = ext4_init_system_zone(); |
Theodore Ts'o | bd2d021 | 2010-10-27 21:30:10 -0400 | [diff] [blame] | 5597 | if (err) |
Fabrice Jouhaud | d44651d | 2011-10-08 16:26:03 -0400 | [diff] [blame] | 5598 | goto out6; |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 5599 | ext4_kset = kset_create_and_add("ext4", NULL, fs_kobj); |
Theodore Ts'o | 0e376b1 | 2012-08-17 10:04:17 -0400 | [diff] [blame] | 5600 | if (!ext4_kset) { |
| 5601 | err = -ENOMEM; |
Theodore Ts'o | dd68314 | 2011-02-03 14:33:49 -0500 | [diff] [blame] | 5602 | goto out5; |
Theodore Ts'o | 0e376b1 | 2012-08-17 10:04:17 -0400 | [diff] [blame] | 5603 | } |
Fabrice Jouhaud | d44651d | 2011-10-08 16:26:03 -0400 | [diff] [blame] | 5604 | ext4_proc_root = proc_mkdir("fs/ext4", NULL); |
Lukas Czerner | 857ac88 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 5605 | |
| 5606 | err = ext4_init_feat_adverts(); |
Theodore Ts'o | dd68314 | 2011-02-03 14:33:49 -0500 | [diff] [blame] | 5607 | if (err) |
| 5608 | goto out4; |
Lukas Czerner | 857ac88 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 5609 | |
Theodore Ts'o | 5dabfc7 | 2010-10-27 21:30:14 -0400 | [diff] [blame] | 5610 | err = ext4_init_mballoc(); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5611 | if (err) |
Alex Tomas | c9de560 | 2008-01-29 00:19:52 -0500 | [diff] [blame] | 5612 | goto out2; |
T Makphaibulchoke | 9c191f7 | 2014-03-18 19:24:49 -0400 | [diff] [blame] | 5613 | else |
| 5614 | ext4_mballoc_ready = 1; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5615 | err = init_inodecache(); |
| 5616 | if (err) |
| 5617 | goto out1; |
Theodore Ts'o | 24b5842 | 2009-12-07 14:08:51 -0500 | [diff] [blame] | 5618 | register_as_ext3(); |
Theodore Ts'o | 2035e77 | 2011-04-18 17:29:14 -0400 | [diff] [blame] | 5619 | register_as_ext2(); |
Theodore Ts'o | 03010a3 | 2008-10-10 20:02:48 -0400 | [diff] [blame] | 5620 | err = register_filesystem(&ext4_fs_type); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5621 | if (err) |
| 5622 | goto out; |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 5623 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5624 | return 0; |
| 5625 | out: |
Theodore Ts'o | 24b5842 | 2009-12-07 14:08:51 -0500 | [diff] [blame] | 5626 | unregister_as_ext2(); |
| 5627 | unregister_as_ext3(); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5628 | destroy_inodecache(); |
| 5629 | out1: |
T Makphaibulchoke | 9c191f7 | 2014-03-18 19:24:49 -0400 | [diff] [blame] | 5630 | ext4_mballoc_ready = 0; |
Theodore Ts'o | 5dabfc7 | 2010-10-27 21:30:14 -0400 | [diff] [blame] | 5631 | ext4_exit_mballoc(); |
T Makphaibulchoke | 9c191f7 | 2014-03-18 19:24:49 -0400 | [diff] [blame] | 5632 | out2: |
Lukas Czerner | 8f02122 | 2011-02-03 14:33:33 -0500 | [diff] [blame] | 5633 | ext4_exit_feat_adverts(); |
Theodore Ts'o | 6fd058f | 2009-05-17 15:38:01 -0400 | [diff] [blame] | 5634 | out4: |
Fabrice Jouhaud | d44651d | 2011-10-08 16:26:03 -0400 | [diff] [blame] | 5635 | if (ext4_proc_root) |
| 5636 | remove_proc_entry("fs/ext4", NULL); |
Theodore Ts'o | dd68314 | 2011-02-03 14:33:49 -0500 | [diff] [blame] | 5637 | kset_unregister(ext4_kset); |
Fabrice Jouhaud | d44651d | 2011-10-08 16:26:03 -0400 | [diff] [blame] | 5638 | out5: |
Theodore Ts'o | dd68314 | 2011-02-03 14:33:49 -0500 | [diff] [blame] | 5639 | ext4_exit_system_zone(); |
Fabrice Jouhaud | d44651d | 2011-10-08 16:26:03 -0400 | [diff] [blame] | 5640 | out6: |
Theodore Ts'o | 5dabfc7 | 2010-10-27 21:30:14 -0400 | [diff] [blame] | 5641 | ext4_exit_pageio(); |
Zheng Liu | 51865fd | 2012-11-08 21:57:32 -0500 | [diff] [blame] | 5642 | out7: |
| 5643 | ext4_exit_es(); |
| 5644 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5645 | return err; |
| 5646 | } |
| 5647 | |
Theodore Ts'o | 5dabfc7 | 2010-10-27 21:30:14 -0400 | [diff] [blame] | 5648 | static void __exit ext4_exit_fs(void) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5649 | { |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 5650 | ext4_destroy_lazyinit_thread(); |
Theodore Ts'o | 24b5842 | 2009-12-07 14:08:51 -0500 | [diff] [blame] | 5651 | unregister_as_ext2(); |
| 5652 | unregister_as_ext3(); |
Theodore Ts'o | 03010a3 | 2008-10-10 20:02:48 -0400 | [diff] [blame] | 5653 | unregister_filesystem(&ext4_fs_type); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5654 | destroy_inodecache(); |
Theodore Ts'o | 5dabfc7 | 2010-10-27 21:30:14 -0400 | [diff] [blame] | 5655 | ext4_exit_mballoc(); |
Lukas Czerner | 8f02122 | 2011-02-03 14:33:33 -0500 | [diff] [blame] | 5656 | ext4_exit_feat_adverts(); |
Theodore Ts'o | 9f6200b | 2008-09-23 09:18:24 -0400 | [diff] [blame] | 5657 | remove_proc_entry("fs/ext4", NULL); |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 5658 | kset_unregister(ext4_kset); |
Theodore Ts'o | 5dabfc7 | 2010-10-27 21:30:14 -0400 | [diff] [blame] | 5659 | ext4_exit_system_zone(); |
| 5660 | ext4_exit_pageio(); |
Eric Sandeen | dd12ed1 | 2013-07-26 15:21:11 -0400 | [diff] [blame] | 5661 | ext4_exit_es(); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5662 | } |
| 5663 | |
| 5664 | MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); |
Theodore Ts'o | 83982b6 | 2009-01-06 14:53:16 -0500 | [diff] [blame] | 5665 | MODULE_DESCRIPTION("Fourth Extended Filesystem"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5666 | MODULE_LICENSE("GPL"); |
Theodore Ts'o | 5dabfc7 | 2010-10-27 21:30:14 -0400 | [diff] [blame] | 5667 | module_init(ext4_init_fs) |
| 5668 | module_exit(ext4_exit_fs) |