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> |
Tejun Heo | 66114ca | 2015-05-22 17:13:32 -0400 | [diff] [blame] | 27 | #include <linux/backing-dev.h> |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 28 | #include <linux/parser.h> |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 29 | #include <linux/buffer_head.h> |
Christoph Hellwig | a569425 | 2007-07-17 04:04:28 -0700 | [diff] [blame] | 30 | #include <linux/exportfs.h> |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 31 | #include <linux/vfs.h> |
| 32 | #include <linux/random.h> |
| 33 | #include <linux/mount.h> |
| 34 | #include <linux/namei.h> |
| 35 | #include <linux/quotaops.h> |
| 36 | #include <linux/seq_file.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 | |
Lukas Czerner | 0b75a84 | 2011-02-23 12:22:49 -0500 | [diff] [blame] | 56 | static struct ext4_lazy_init *ext4_li_info; |
| 57 | static struct mutex ext4_li_mtx; |
Theodore Ts'o | e294a53 | 2015-08-15 14:59:44 -0400 | [diff] [blame] | 58 | static struct ratelimit_state ext4_mount_msg_ratelimit; |
Theodore Ts'o | 9f6200b | 2008-09-23 09:18:24 -0400 | [diff] [blame] | 59 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 60 | static int ext4_load_journal(struct super_block *, struct ext4_super_block *, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 61 | unsigned long journal_devnum); |
Theodore Ts'o | 2adf6da | 2012-03-03 23:20:50 -0500 | [diff] [blame] | 62 | 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] | 63 | static int ext4_commit_super(struct super_block *sb, int sync); |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 64 | static void ext4_mark_recovery_complete(struct super_block *sb, |
| 65 | struct ext4_super_block *es); |
| 66 | static void ext4_clear_journal_err(struct super_block *sb, |
| 67 | struct ext4_super_block *es); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 68 | static int ext4_sync_fs(struct super_block *sb, int wait); |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 69 | static int ext4_remount(struct super_block *sb, int *flags, char *data); |
| 70 | static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); |
Takashi Sato | c4be0c1 | 2009-01-09 16:40:58 -0800 | [diff] [blame] | 71 | static int ext4_unfreeze(struct super_block *sb); |
Takashi Sato | c4be0c1 | 2009-01-09 16:40:58 -0800 | [diff] [blame] | 72 | static int ext4_freeze(struct super_block *sb); |
Al Viro | 152a083 | 2010-07-25 00:46:55 +0400 | [diff] [blame] | 73 | static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, |
| 74 | const char *dev_name, void *data); |
Theodore Ts'o | 2035e77 | 2011-04-18 17:29:14 -0400 | [diff] [blame] | 75 | static inline int ext2_feature_set_ok(struct super_block *sb); |
| 76 | static inline int ext3_feature_set_ok(struct super_block *sb); |
Amir Goldstein | d39195c | 2011-02-28 00:53:45 -0500 | [diff] [blame] | 77 | static int ext4_feature_set_ok(struct super_block *sb, int readonly); |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 78 | static void ext4_destroy_lazyinit_thread(void); |
| 79 | static void ext4_unregister_li_request(struct super_block *sb); |
Eric Sandeen | 8f1f745 | 2011-02-03 14:33:15 -0500 | [diff] [blame] | 80 | static void ext4_clear_request_list(void); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 81 | |
Jan Kara | e74031f | 2015-12-07 14:35:49 -0500 | [diff] [blame] | 82 | /* |
| 83 | * Lock ordering |
| 84 | * |
| 85 | * Note the difference between i_mmap_sem (EXT4_I(inode)->i_mmap_sem) and |
| 86 | * i_mmap_rwsem (inode->i_mmap_rwsem)! |
| 87 | * |
| 88 | * page fault path: |
| 89 | * mmap_sem -> sb_start_pagefault -> i_mmap_sem (r) -> transaction start -> |
| 90 | * page lock -> i_data_sem (rw) |
| 91 | * |
| 92 | * buffered write path: |
| 93 | * sb_start_write -> i_mutex -> mmap_sem |
| 94 | * sb_start_write -> i_mutex -> transaction start -> page lock -> |
| 95 | * i_data_sem (rw) |
| 96 | * |
| 97 | * truncate: |
| 98 | * sb_start_write -> i_mutex -> EXT4_STATE_DIOREAD_LOCK (w) -> i_mmap_sem (w) -> |
| 99 | * i_mmap_rwsem (w) -> page lock |
| 100 | * sb_start_write -> i_mutex -> EXT4_STATE_DIOREAD_LOCK (w) -> i_mmap_sem (w) -> |
| 101 | * transaction start -> i_data_sem (rw) |
| 102 | * |
| 103 | * direct IO: |
| 104 | * sb_start_write -> i_mutex -> EXT4_STATE_DIOREAD_LOCK (r) -> mmap_sem |
| 105 | * sb_start_write -> i_mutex -> EXT4_STATE_DIOREAD_LOCK (r) -> |
| 106 | * transaction start -> i_data_sem (rw) |
| 107 | * |
| 108 | * writepages: |
| 109 | * transaction start -> page lock(s) -> i_data_sem (rw) |
| 110 | */ |
| 111 | |
Jan Kara | c290ea0 | 2015-06-18 16:52:29 +0200 | [diff] [blame] | 112 | #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT2) |
Theodore Ts'o | 2035e77 | 2011-04-18 17:29:14 -0400 | [diff] [blame] | 113 | static struct file_system_type ext2_fs_type = { |
| 114 | .owner = THIS_MODULE, |
| 115 | .name = "ext2", |
| 116 | .mount = ext4_mount, |
| 117 | .kill_sb = kill_block_super, |
| 118 | .fs_flags = FS_REQUIRES_DEV, |
| 119 | }; |
Eric W. Biederman | 7f78e03 | 2013-03-02 19:39:14 -0800 | [diff] [blame] | 120 | MODULE_ALIAS_FS("ext2"); |
Eric W. Biederman | fa7614dd | 2013-03-12 18:27:41 -0700 | [diff] [blame] | 121 | MODULE_ALIAS("ext2"); |
Theodore Ts'o | 2035e77 | 2011-04-18 17:29:14 -0400 | [diff] [blame] | 122 | #define IS_EXT2_SB(sb) ((sb)->s_bdev->bd_holder == &ext2_fs_type) |
| 123 | #else |
| 124 | #define IS_EXT2_SB(sb) (0) |
| 125 | #endif |
| 126 | |
| 127 | |
Jan Kara | ba69f9a | 2010-03-24 20:18:37 -0400 | [diff] [blame] | 128 | static struct file_system_type ext3_fs_type = { |
| 129 | .owner = THIS_MODULE, |
| 130 | .name = "ext3", |
Al Viro | 152a083 | 2010-07-25 00:46:55 +0400 | [diff] [blame] | 131 | .mount = ext4_mount, |
Jan Kara | ba69f9a | 2010-03-24 20:18:37 -0400 | [diff] [blame] | 132 | .kill_sb = kill_block_super, |
| 133 | .fs_flags = FS_REQUIRES_DEV, |
| 134 | }; |
Eric W. Biederman | 7f78e03 | 2013-03-02 19:39:14 -0800 | [diff] [blame] | 135 | MODULE_ALIAS_FS("ext3"); |
Eric W. Biederman | fa7614dd | 2013-03-12 18:27:41 -0700 | [diff] [blame] | 136 | MODULE_ALIAS("ext3"); |
Jan Kara | ba69f9a | 2010-03-24 20:18:37 -0400 | [diff] [blame] | 137 | #define IS_EXT3_SB(sb) ((sb)->s_bdev->bd_holder == &ext3_fs_type) |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 138 | |
Darrick J. Wong | d25425f | 2012-04-29 18:25:10 -0400 | [diff] [blame] | 139 | static int ext4_verify_csum_type(struct super_block *sb, |
| 140 | struct ext4_super_block *es) |
| 141 | { |
Darrick J. Wong | e2b911c | 2015-10-17 16:18:43 -0400 | [diff] [blame] | 142 | if (!ext4_has_feature_metadata_csum(sb)) |
Darrick J. Wong | d25425f | 2012-04-29 18:25:10 -0400 | [diff] [blame] | 143 | return 1; |
| 144 | |
| 145 | return es->s_checksum_type == EXT4_CRC32C_CHKSUM; |
| 146 | } |
| 147 | |
Darrick J. Wong | a9c47317 | 2012-04-29 18:29:10 -0400 | [diff] [blame] | 148 | static __le32 ext4_superblock_csum(struct super_block *sb, |
| 149 | struct ext4_super_block *es) |
| 150 | { |
| 151 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
| 152 | int offset = offsetof(struct ext4_super_block, s_checksum); |
| 153 | __u32 csum; |
| 154 | |
| 155 | csum = ext4_chksum(sbi, ~0, (char *)es, offset); |
| 156 | |
| 157 | return cpu_to_le32(csum); |
| 158 | } |
| 159 | |
Stephen Hemminger | c197855 | 2014-05-12 10:50:23 -0400 | [diff] [blame] | 160 | static int ext4_superblock_csum_verify(struct super_block *sb, |
| 161 | struct ext4_super_block *es) |
Darrick J. Wong | a9c47317 | 2012-04-29 18:29:10 -0400 | [diff] [blame] | 162 | { |
Dmitry Monakhov | 9aa5d32 | 2014-10-13 03:36:16 -0400 | [diff] [blame] | 163 | if (!ext4_has_metadata_csum(sb)) |
Darrick J. Wong | a9c47317 | 2012-04-29 18:29:10 -0400 | [diff] [blame] | 164 | return 1; |
| 165 | |
| 166 | return es->s_checksum == ext4_superblock_csum(sb, es); |
| 167 | } |
| 168 | |
Theodore Ts'o | 06db49e | 2012-10-10 01:06:58 -0400 | [diff] [blame] | 169 | void ext4_superblock_csum_set(struct super_block *sb) |
Darrick J. Wong | a9c47317 | 2012-04-29 18:29:10 -0400 | [diff] [blame] | 170 | { |
Theodore Ts'o | 06db49e | 2012-10-10 01:06:58 -0400 | [diff] [blame] | 171 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
| 172 | |
Dmitry Monakhov | 9aa5d32 | 2014-10-13 03:36:16 -0400 | [diff] [blame] | 173 | if (!ext4_has_metadata_csum(sb)) |
Darrick J. Wong | a9c47317 | 2012-04-29 18:29:10 -0400 | [diff] [blame] | 174 | return; |
| 175 | |
| 176 | es->s_checksum = ext4_superblock_csum(sb, es); |
| 177 | } |
| 178 | |
Theodore Ts'o | 9933fc0 | 2011-08-01 08:45:02 -0400 | [diff] [blame] | 179 | void *ext4_kvmalloc(size_t size, gfp_t flags) |
| 180 | { |
| 181 | void *ret; |
| 182 | |
Joe Perches | 8be04b9 | 2013-06-19 12:15:53 -0700 | [diff] [blame] | 183 | ret = kmalloc(size, flags | __GFP_NOWARN); |
Theodore Ts'o | 9933fc0 | 2011-08-01 08:45:02 -0400 | [diff] [blame] | 184 | if (!ret) |
| 185 | ret = __vmalloc(size, flags, PAGE_KERNEL); |
| 186 | return ret; |
| 187 | } |
| 188 | |
| 189 | void *ext4_kvzalloc(size_t size, gfp_t flags) |
| 190 | { |
| 191 | void *ret; |
| 192 | |
Joe Perches | 8be04b9 | 2013-06-19 12:15:53 -0700 | [diff] [blame] | 193 | ret = kzalloc(size, flags | __GFP_NOWARN); |
Theodore Ts'o | 9933fc0 | 2011-08-01 08:45:02 -0400 | [diff] [blame] | 194 | if (!ret) |
| 195 | ret = __vmalloc(size, flags | __GFP_ZERO, PAGE_KERNEL); |
| 196 | return ret; |
| 197 | } |
| 198 | |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 199 | ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, |
| 200 | struct ext4_group_desc *bg) |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 201 | { |
Aneesh Kumar K.V | 3a14589 | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 202 | return le32_to_cpu(bg->bg_block_bitmap_lo) | |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 203 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 204 | (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] | 205 | } |
| 206 | |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 207 | ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, |
| 208 | struct ext4_group_desc *bg) |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 209 | { |
Aneesh Kumar K.V | 5272f83 | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 210 | return le32_to_cpu(bg->bg_inode_bitmap_lo) | |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 211 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 212 | (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] | 213 | } |
| 214 | |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 215 | ext4_fsblk_t ext4_inode_table(struct super_block *sb, |
| 216 | struct ext4_group_desc *bg) |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 217 | { |
Aneesh Kumar K.V | 5272f83 | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 218 | return le32_to_cpu(bg->bg_inode_table_lo) | |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 219 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 220 | (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] | 221 | } |
| 222 | |
Theodore Ts'o | 021b65b | 2011-09-09 19:08:51 -0400 | [diff] [blame] | 223 | __u32 ext4_free_group_clusters(struct super_block *sb, |
| 224 | struct ext4_group_desc *bg) |
Aneesh Kumar K.V | 560671a | 2009-01-05 22:20:24 -0500 | [diff] [blame] | 225 | { |
| 226 | return le16_to_cpu(bg->bg_free_blocks_count_lo) | |
| 227 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 228 | (__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] | 229 | } |
| 230 | |
| 231 | __u32 ext4_free_inodes_count(struct super_block *sb, |
| 232 | struct ext4_group_desc *bg) |
| 233 | { |
| 234 | return le16_to_cpu(bg->bg_free_inodes_count_lo) | |
| 235 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 236 | (__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] | 237 | } |
| 238 | |
| 239 | __u32 ext4_used_dirs_count(struct super_block *sb, |
| 240 | struct ext4_group_desc *bg) |
| 241 | { |
| 242 | return le16_to_cpu(bg->bg_used_dirs_count_lo) | |
| 243 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 244 | (__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] | 245 | } |
| 246 | |
| 247 | __u32 ext4_itable_unused_count(struct super_block *sb, |
| 248 | struct ext4_group_desc *bg) |
| 249 | { |
| 250 | return le16_to_cpu(bg->bg_itable_unused_lo) | |
| 251 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 252 | (__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] | 253 | } |
| 254 | |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 255 | void ext4_block_bitmap_set(struct super_block *sb, |
| 256 | struct ext4_group_desc *bg, ext4_fsblk_t blk) |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 257 | { |
Aneesh Kumar K.V | 3a14589 | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 258 | bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 259 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
| 260 | bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 261 | } |
| 262 | |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 263 | void ext4_inode_bitmap_set(struct super_block *sb, |
| 264 | struct ext4_group_desc *bg, ext4_fsblk_t blk) |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 265 | { |
Aneesh Kumar K.V | 5272f83 | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 266 | bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 267 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
| 268 | bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 269 | } |
| 270 | |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 271 | void ext4_inode_table_set(struct super_block *sb, |
| 272 | struct ext4_group_desc *bg, ext4_fsblk_t blk) |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 273 | { |
Aneesh Kumar K.V | 5272f83 | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 274 | bg->bg_inode_table_lo = cpu_to_le32((u32)blk); |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 275 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
| 276 | bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 277 | } |
| 278 | |
Theodore Ts'o | 021b65b | 2011-09-09 19:08:51 -0400 | [diff] [blame] | 279 | void ext4_free_group_clusters_set(struct super_block *sb, |
| 280 | struct ext4_group_desc *bg, __u32 count) |
Aneesh Kumar K.V | 560671a | 2009-01-05 22:20:24 -0500 | [diff] [blame] | 281 | { |
| 282 | bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); |
| 283 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
| 284 | bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); |
| 285 | } |
| 286 | |
| 287 | void ext4_free_inodes_set(struct super_block *sb, |
| 288 | struct ext4_group_desc *bg, __u32 count) |
| 289 | { |
| 290 | bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); |
| 291 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
| 292 | bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); |
| 293 | } |
| 294 | |
| 295 | void ext4_used_dirs_set(struct super_block *sb, |
| 296 | struct ext4_group_desc *bg, __u32 count) |
| 297 | { |
| 298 | bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); |
| 299 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
| 300 | bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); |
| 301 | } |
| 302 | |
| 303 | void ext4_itable_unused_set(struct super_block *sb, |
| 304 | struct ext4_group_desc *bg, __u32 count) |
| 305 | { |
| 306 | bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); |
| 307 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
| 308 | bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); |
| 309 | } |
| 310 | |
Curt Wohlgemuth | d3d1faf | 2009-09-29 11:01:03 -0400 | [diff] [blame] | 311 | |
Theodore Ts'o | 1c13d5c | 2010-07-27 11:56:03 -0400 | [diff] [blame] | 312 | static void __save_error_info(struct super_block *sb, const char *func, |
| 313 | unsigned int line) |
| 314 | { |
| 315 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
| 316 | |
| 317 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; |
Theodore Ts'o | 1b46617 | 2015-05-14 18:37:30 -0400 | [diff] [blame] | 318 | if (bdev_read_only(sb->s_bdev)) |
| 319 | return; |
Theodore Ts'o | 1c13d5c | 2010-07-27 11:56:03 -0400 | [diff] [blame] | 320 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); |
| 321 | es->s_last_error_time = cpu_to_le32(get_seconds()); |
| 322 | strncpy(es->s_last_error_func, func, sizeof(es->s_last_error_func)); |
| 323 | es->s_last_error_line = cpu_to_le32(line); |
| 324 | if (!es->s_first_error_time) { |
| 325 | es->s_first_error_time = es->s_last_error_time; |
| 326 | strncpy(es->s_first_error_func, func, |
| 327 | sizeof(es->s_first_error_func)); |
| 328 | es->s_first_error_line = cpu_to_le32(line); |
| 329 | es->s_first_error_ino = es->s_last_error_ino; |
| 330 | es->s_first_error_block = es->s_last_error_block; |
| 331 | } |
Theodore Ts'o | 66e61a9 | 2010-07-27 11:56:04 -0400 | [diff] [blame] | 332 | /* |
| 333 | * Start the daily error reporting function if it hasn't been |
| 334 | * started already |
| 335 | */ |
| 336 | if (!es->s_error_count) |
| 337 | 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] | 338 | le32_add_cpu(&es->s_error_count, 1); |
Theodore Ts'o | 1c13d5c | 2010-07-27 11:56:03 -0400 | [diff] [blame] | 339 | } |
| 340 | |
| 341 | static void save_error_info(struct super_block *sb, const char *func, |
| 342 | unsigned int line) |
| 343 | { |
| 344 | __save_error_info(sb, func, line); |
| 345 | ext4_commit_super(sb, 1); |
| 346 | } |
| 347 | |
Theodore Ts'o | bdfe0cbd | 2015-08-16 10:03:57 -0400 | [diff] [blame] | 348 | /* |
| 349 | * The del_gendisk() function uninitializes the disk-specific data |
| 350 | * structures, including the bdi structure, without telling anyone |
| 351 | * else. Once this happens, any attempt to call mark_buffer_dirty() |
| 352 | * (for example, by ext4_commit_super), will cause a kernel OOPS. |
| 353 | * This is a kludge to prevent these oops until we can put in a proper |
| 354 | * hook in del_gendisk() to inform the VFS and file system layers. |
| 355 | */ |
| 356 | static int block_device_ejected(struct super_block *sb) |
| 357 | { |
| 358 | struct inode *bd_inode = sb->s_bdev->bd_inode; |
| 359 | struct backing_dev_info *bdi = inode_to_bdi(bd_inode); |
| 360 | |
| 361 | return bdi->dev == NULL; |
| 362 | } |
| 363 | |
Bobi Jam | 18aadd4 | 2012-02-20 17:53:02 -0500 | [diff] [blame] | 364 | static void ext4_journal_commit_callback(journal_t *journal, transaction_t *txn) |
| 365 | { |
| 366 | struct super_block *sb = journal->j_private; |
| 367 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
| 368 | int error = is_journal_aborted(journal); |
Dmitry Monakhov | 5d3ee20 | 2013-04-03 22:08:52 -0400 | [diff] [blame] | 369 | struct ext4_journal_cb_entry *jce; |
Bobi Jam | 18aadd4 | 2012-02-20 17:53:02 -0500 | [diff] [blame] | 370 | |
Dmitry Monakhov | 5d3ee20 | 2013-04-03 22:08:52 -0400 | [diff] [blame] | 371 | BUG_ON(txn->t_state == T_FINISHED); |
Bobi Jam | 18aadd4 | 2012-02-20 17:53:02 -0500 | [diff] [blame] | 372 | spin_lock(&sbi->s_md_lock); |
Dmitry Monakhov | 5d3ee20 | 2013-04-03 22:08:52 -0400 | [diff] [blame] | 373 | while (!list_empty(&txn->t_private_list)) { |
| 374 | jce = list_entry(txn->t_private_list.next, |
| 375 | struct ext4_journal_cb_entry, jce_list); |
Bobi Jam | 18aadd4 | 2012-02-20 17:53:02 -0500 | [diff] [blame] | 376 | list_del_init(&jce->jce_list); |
| 377 | spin_unlock(&sbi->s_md_lock); |
| 378 | jce->jce_func(sb, jce, error); |
| 379 | spin_lock(&sbi->s_md_lock); |
| 380 | } |
| 381 | spin_unlock(&sbi->s_md_lock); |
| 382 | } |
Theodore Ts'o | 1c13d5c | 2010-07-27 11:56:03 -0400 | [diff] [blame] | 383 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 384 | /* Deal with the reporting of failure conditions on a filesystem such as |
| 385 | * inconsistencies detected or read IO failures. |
| 386 | * |
| 387 | * 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] | 388 | * superblock. That is not possible on ext4, because we may have other |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 389 | * write ordering constraints on the superblock which prevent us from |
| 390 | * writing it out straight away; and given that the journal is about to |
| 391 | * be aborted, we can't rely on the current, or future, transactions to |
| 392 | * write out the superblock safely. |
| 393 | * |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 394 | * 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] | 395 | * the journal instead. On recovery, the journal will complain about |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 396 | * that error until we've noted it down and cleared it. |
| 397 | */ |
| 398 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 399 | static void ext4_handle_error(struct super_block *sb) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 400 | { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 401 | if (sb->s_flags & MS_RDONLY) |
| 402 | return; |
| 403 | |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 404 | if (!test_opt(sb, ERRORS_CONT)) { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 405 | journal_t *journal = EXT4_SB(sb)->s_journal; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 406 | |
Theodore Ts'o | 4ab2f15 | 2009-06-13 10:09:36 -0400 | [diff] [blame] | 407 | EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 408 | if (journal) |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 409 | jbd2_journal_abort(journal, -EIO); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 410 | } |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 411 | if (test_opt(sb, ERRORS_RO)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 412 | ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); |
Dmitry Monakhov | 4418e141 | 2013-06-12 22:38:04 -0400 | [diff] [blame] | 413 | /* |
| 414 | * Make sure updated value of ->s_mount_flags will be visible |
| 415 | * before ->s_flags update |
| 416 | */ |
| 417 | smp_wmb(); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 418 | sb->s_flags |= MS_RDONLY; |
| 419 | } |
Daeho Jeong | 4327ba5 | 2015-10-18 17:02:56 -0400 | [diff] [blame] | 420 | if (test_opt(sb, ERRORS_PANIC)) { |
| 421 | if (EXT4_SB(sb)->s_journal && |
| 422 | !(EXT4_SB(sb)->s_journal->j_flags & JBD2_REC_ERR)) |
| 423 | return; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 424 | panic("EXT4-fs (device %s): panic forced after error\n", |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 425 | sb->s_id); |
Daeho Jeong | 4327ba5 | 2015-10-18 17:02:56 -0400 | [diff] [blame] | 426 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 427 | } |
| 428 | |
Theodore Ts'o | efbed4d | 2013-10-17 21:11:01 -0400 | [diff] [blame] | 429 | #define ext4_error_ratelimit(sb) \ |
| 430 | ___ratelimit(&(EXT4_SB(sb)->s_err_ratelimit_state), \ |
| 431 | "EXT4-fs error") |
| 432 | |
Eric Sandeen | 12062dd | 2010-02-15 14:19:27 -0500 | [diff] [blame] | 433 | void __ext4_error(struct super_block *sb, const char *function, |
Theodore Ts'o | c398eda | 2010-07-27 11:56:40 -0400 | [diff] [blame] | 434 | unsigned int line, const char *fmt, ...) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 435 | { |
Joe Perches | 0ff2ea7 | 2010-12-19 22:43:19 -0500 | [diff] [blame] | 436 | struct va_format vaf; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 437 | va_list args; |
| 438 | |
Theodore Ts'o | efbed4d | 2013-10-17 21:11:01 -0400 | [diff] [blame] | 439 | if (ext4_error_ratelimit(sb)) { |
| 440 | va_start(args, fmt); |
| 441 | vaf.fmt = fmt; |
| 442 | vaf.va = &args; |
| 443 | printk(KERN_CRIT |
| 444 | "EXT4-fs error (device %s): %s:%d: comm %s: %pV\n", |
| 445 | sb->s_id, function, line, current->comm, &vaf); |
| 446 | va_end(args); |
| 447 | } |
Theodore Ts'o | f3fc0210 | 2012-05-30 23:00:16 -0400 | [diff] [blame] | 448 | save_error_info(sb, function, line); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 449 | ext4_handle_error(sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 450 | } |
| 451 | |
Joe Perches | e7c96e8 | 2013-07-01 08:12:37 -0400 | [diff] [blame] | 452 | void __ext4_error_inode(struct inode *inode, const char *function, |
| 453 | unsigned int line, ext4_fsblk_t block, |
| 454 | const char *fmt, ...) |
Frank Mayhar | 273df55 | 2010-03-02 11:46:09 -0500 | [diff] [blame] | 455 | { |
| 456 | va_list args; |
Theodore Ts'o | f7c2117 | 2011-01-10 12:10:55 -0500 | [diff] [blame] | 457 | struct va_format vaf; |
Theodore Ts'o | 1c13d5c | 2010-07-27 11:56:03 -0400 | [diff] [blame] | 458 | struct ext4_super_block *es = EXT4_SB(inode->i_sb)->s_es; |
Frank Mayhar | 273df55 | 2010-03-02 11:46:09 -0500 | [diff] [blame] | 459 | |
Theodore Ts'o | 1c13d5c | 2010-07-27 11:56:03 -0400 | [diff] [blame] | 460 | es->s_last_error_ino = cpu_to_le32(inode->i_ino); |
| 461 | es->s_last_error_block = cpu_to_le64(block); |
Theodore Ts'o | efbed4d | 2013-10-17 21:11:01 -0400 | [diff] [blame] | 462 | if (ext4_error_ratelimit(inode->i_sb)) { |
| 463 | va_start(args, fmt); |
| 464 | vaf.fmt = fmt; |
| 465 | vaf.va = &args; |
| 466 | if (block) |
| 467 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " |
| 468 | "inode #%lu: block %llu: comm %s: %pV\n", |
| 469 | inode->i_sb->s_id, function, line, inode->i_ino, |
| 470 | block, current->comm, &vaf); |
| 471 | else |
| 472 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " |
| 473 | "inode #%lu: comm %s: %pV\n", |
| 474 | inode->i_sb->s_id, function, line, inode->i_ino, |
| 475 | current->comm, &vaf); |
| 476 | va_end(args); |
| 477 | } |
Theodore Ts'o | 1c13d5c | 2010-07-27 11:56:03 -0400 | [diff] [blame] | 478 | save_error_info(inode->i_sb, function, line); |
Frank Mayhar | 273df55 | 2010-03-02 11:46:09 -0500 | [diff] [blame] | 479 | ext4_handle_error(inode->i_sb); |
| 480 | } |
| 481 | |
Joe Perches | e7c96e8 | 2013-07-01 08:12:37 -0400 | [diff] [blame] | 482 | void __ext4_error_file(struct file *file, const char *function, |
| 483 | unsigned int line, ext4_fsblk_t block, |
| 484 | const char *fmt, ...) |
Frank Mayhar | 273df55 | 2010-03-02 11:46:09 -0500 | [diff] [blame] | 485 | { |
| 486 | va_list args; |
Theodore Ts'o | f7c2117 | 2011-01-10 12:10:55 -0500 | [diff] [blame] | 487 | struct va_format vaf; |
Theodore Ts'o | 1c13d5c | 2010-07-27 11:56:03 -0400 | [diff] [blame] | 488 | struct ext4_super_block *es; |
Al Viro | 496ad9a | 2013-01-23 17:07:38 -0500 | [diff] [blame] | 489 | struct inode *inode = file_inode(file); |
Frank Mayhar | 273df55 | 2010-03-02 11:46:09 -0500 | [diff] [blame] | 490 | char pathname[80], *path; |
| 491 | |
Theodore Ts'o | 1c13d5c | 2010-07-27 11:56:03 -0400 | [diff] [blame] | 492 | es = EXT4_SB(inode->i_sb)->s_es; |
| 493 | es->s_last_error_ino = cpu_to_le32(inode->i_ino); |
Theodore Ts'o | efbed4d | 2013-10-17 21:11:01 -0400 | [diff] [blame] | 494 | if (ext4_error_ratelimit(inode->i_sb)) { |
Miklos Szeredi | 9bf39ab | 2015-06-19 10:29:13 +0200 | [diff] [blame] | 495 | path = file_path(file, pathname, sizeof(pathname)); |
Theodore Ts'o | efbed4d | 2013-10-17 21:11:01 -0400 | [diff] [blame] | 496 | if (IS_ERR(path)) |
| 497 | path = "(unknown)"; |
| 498 | va_start(args, fmt); |
| 499 | vaf.fmt = fmt; |
| 500 | vaf.va = &args; |
| 501 | if (block) |
| 502 | printk(KERN_CRIT |
| 503 | "EXT4-fs error (device %s): %s:%d: inode #%lu: " |
| 504 | "block %llu: comm %s: path %s: %pV\n", |
| 505 | inode->i_sb->s_id, function, line, inode->i_ino, |
| 506 | block, current->comm, path, &vaf); |
| 507 | else |
| 508 | printk(KERN_CRIT |
| 509 | "EXT4-fs error (device %s): %s:%d: inode #%lu: " |
| 510 | "comm %s: path %s: %pV\n", |
| 511 | inode->i_sb->s_id, function, line, inode->i_ino, |
| 512 | current->comm, path, &vaf); |
| 513 | va_end(args); |
| 514 | } |
Theodore Ts'o | 1c13d5c | 2010-07-27 11:56:03 -0400 | [diff] [blame] | 515 | save_error_info(inode->i_sb, function, line); |
Frank Mayhar | 273df55 | 2010-03-02 11:46:09 -0500 | [diff] [blame] | 516 | ext4_handle_error(inode->i_sb); |
| 517 | } |
| 518 | |
Theodore Ts'o | 722887d | 2013-02-08 13:00:31 -0500 | [diff] [blame] | 519 | const char *ext4_decode_error(struct super_block *sb, int errno, |
| 520 | char nbuf[16]) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 521 | { |
| 522 | char *errstr = NULL; |
| 523 | |
| 524 | switch (errno) { |
Darrick J. Wong | 6a797d2 | 2015-10-17 16:16:04 -0400 | [diff] [blame] | 525 | case -EFSCORRUPTED: |
| 526 | errstr = "Corrupt filesystem"; |
| 527 | break; |
| 528 | case -EFSBADCRC: |
| 529 | errstr = "Filesystem failed CRC"; |
| 530 | break; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 531 | case -EIO: |
| 532 | errstr = "IO failure"; |
| 533 | break; |
| 534 | case -ENOMEM: |
| 535 | errstr = "Out of memory"; |
| 536 | break; |
| 537 | case -EROFS: |
Theodore Ts'o | 78f1ddb | 2009-07-27 23:09:47 -0400 | [diff] [blame] | 538 | if (!sb || (EXT4_SB(sb)->s_journal && |
| 539 | EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 540 | errstr = "Journal has aborted"; |
| 541 | else |
| 542 | errstr = "Readonly filesystem"; |
| 543 | break; |
| 544 | default: |
| 545 | /* If the caller passed in an extra buffer for unknown |
| 546 | * errors, textualise them now. Else we just return |
| 547 | * NULL. */ |
| 548 | if (nbuf) { |
| 549 | /* Check for truncated error codes... */ |
| 550 | if (snprintf(nbuf, 16, "error %d", -errno) >= 0) |
| 551 | errstr = nbuf; |
| 552 | } |
| 553 | break; |
| 554 | } |
| 555 | |
| 556 | return errstr; |
| 557 | } |
| 558 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 559 | /* __ext4_std_error decodes expected errors from journaling functions |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 560 | * automatically and invokes the appropriate error response. */ |
| 561 | |
Theodore Ts'o | c398eda | 2010-07-27 11:56:40 -0400 | [diff] [blame] | 562 | void __ext4_std_error(struct super_block *sb, const char *function, |
| 563 | unsigned int line, int errno) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 564 | { |
| 565 | char nbuf[16]; |
| 566 | const char *errstr; |
| 567 | |
| 568 | /* Special case: if the error is EROFS, and we're not already |
| 569 | * inside a transaction, then there's really no point in logging |
| 570 | * an error. */ |
| 571 | if (errno == -EROFS && journal_current_handle() == NULL && |
| 572 | (sb->s_flags & MS_RDONLY)) |
| 573 | return; |
| 574 | |
Theodore Ts'o | efbed4d | 2013-10-17 21:11:01 -0400 | [diff] [blame] | 575 | if (ext4_error_ratelimit(sb)) { |
| 576 | errstr = ext4_decode_error(sb, errno, nbuf); |
| 577 | printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n", |
| 578 | sb->s_id, function, line, errstr); |
| 579 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 580 | |
Theodore Ts'o | efbed4d | 2013-10-17 21:11:01 -0400 | [diff] [blame] | 581 | save_error_info(sb, function, line); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 582 | ext4_handle_error(sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 583 | } |
| 584 | |
| 585 | /* |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 586 | * ext4_abort is a much stronger failure handler than ext4_error. The |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 587 | * abort function may be used to deal with unrecoverable failures such |
| 588 | * as journal IO errors or ENOMEM at a critical moment in log management. |
| 589 | * |
| 590 | * We unconditionally force the filesystem into an ABORT|READONLY state, |
| 591 | * unless the error response on the fs has been set to panic in which |
| 592 | * case we take the easy way out and panic immediately. |
| 593 | */ |
| 594 | |
Theodore Ts'o | c67d859 | 2010-06-29 11:07:07 -0400 | [diff] [blame] | 595 | void __ext4_abort(struct super_block *sb, const char *function, |
Theodore Ts'o | c398eda | 2010-07-27 11:56:40 -0400 | [diff] [blame] | 596 | unsigned int line, const char *fmt, ...) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 597 | { |
| 598 | va_list args; |
| 599 | |
Theodore Ts'o | 1c13d5c | 2010-07-27 11:56:03 -0400 | [diff] [blame] | 600 | save_error_info(sb, function, line); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 601 | va_start(args, fmt); |
Theodore Ts'o | c398eda | 2010-07-27 11:56:40 -0400 | [diff] [blame] | 602 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: ", sb->s_id, |
| 603 | function, line); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 604 | vprintk(fmt, args); |
| 605 | printk("\n"); |
| 606 | va_end(args); |
| 607 | |
Theodore Ts'o | 1c13d5c | 2010-07-27 11:56:03 -0400 | [diff] [blame] | 608 | if ((sb->s_flags & MS_RDONLY) == 0) { |
| 609 | ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); |
Theodore Ts'o | 1c13d5c | 2010-07-27 11:56:03 -0400 | [diff] [blame] | 610 | EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; |
Dmitry Monakhov | 4418e141 | 2013-06-12 22:38:04 -0400 | [diff] [blame] | 611 | /* |
| 612 | * Make sure updated value of ->s_mount_flags will be visible |
| 613 | * before ->s_flags update |
| 614 | */ |
| 615 | smp_wmb(); |
| 616 | sb->s_flags |= MS_RDONLY; |
Theodore Ts'o | 1c13d5c | 2010-07-27 11:56:03 -0400 | [diff] [blame] | 617 | if (EXT4_SB(sb)->s_journal) |
| 618 | jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); |
| 619 | save_error_info(sb, function, line); |
| 620 | } |
Daeho Jeong | 4327ba5 | 2015-10-18 17:02:56 -0400 | [diff] [blame] | 621 | if (test_opt(sb, ERRORS_PANIC)) { |
| 622 | if (EXT4_SB(sb)->s_journal && |
| 623 | !(EXT4_SB(sb)->s_journal->j_flags & JBD2_REC_ERR)) |
| 624 | return; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 625 | panic("EXT4-fs panic from previous error\n"); |
Daeho Jeong | 4327ba5 | 2015-10-18 17:02:56 -0400 | [diff] [blame] | 626 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 627 | } |
| 628 | |
Joe Perches | e7c96e8 | 2013-07-01 08:12:37 -0400 | [diff] [blame] | 629 | void __ext4_msg(struct super_block *sb, |
| 630 | const char *prefix, const char *fmt, ...) |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 631 | { |
Joe Perches | 0ff2ea7 | 2010-12-19 22:43:19 -0500 | [diff] [blame] | 632 | struct va_format vaf; |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 633 | va_list args; |
| 634 | |
Theodore Ts'o | efbed4d | 2013-10-17 21:11:01 -0400 | [diff] [blame] | 635 | if (!___ratelimit(&(EXT4_SB(sb)->s_msg_ratelimit_state), "EXT4-fs")) |
| 636 | return; |
| 637 | |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 638 | va_start(args, fmt); |
Joe Perches | 0ff2ea7 | 2010-12-19 22:43:19 -0500 | [diff] [blame] | 639 | vaf.fmt = fmt; |
| 640 | vaf.va = &args; |
| 641 | printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf); |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 642 | va_end(args); |
| 643 | } |
| 644 | |
Andreas Dilger | b03a2f7 | 2015-06-15 14:50:26 -0400 | [diff] [blame] | 645 | #define ext4_warning_ratelimit(sb) \ |
| 646 | ___ratelimit(&(EXT4_SB(sb)->s_warning_ratelimit_state), \ |
| 647 | "EXT4-fs warning") |
| 648 | |
Eric Sandeen | 12062dd | 2010-02-15 14:19:27 -0500 | [diff] [blame] | 649 | void __ext4_warning(struct super_block *sb, const char *function, |
Theodore Ts'o | c398eda | 2010-07-27 11:56:40 -0400 | [diff] [blame] | 650 | unsigned int line, const char *fmt, ...) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 651 | { |
Joe Perches | 0ff2ea7 | 2010-12-19 22:43:19 -0500 | [diff] [blame] | 652 | struct va_format vaf; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 653 | va_list args; |
| 654 | |
Andreas Dilger | b03a2f7 | 2015-06-15 14:50:26 -0400 | [diff] [blame] | 655 | if (!ext4_warning_ratelimit(sb)) |
Theodore Ts'o | efbed4d | 2013-10-17 21:11:01 -0400 | [diff] [blame] | 656 | return; |
| 657 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 658 | va_start(args, fmt); |
Joe Perches | 0ff2ea7 | 2010-12-19 22:43:19 -0500 | [diff] [blame] | 659 | vaf.fmt = fmt; |
| 660 | vaf.va = &args; |
| 661 | printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n", |
| 662 | sb->s_id, function, line, &vaf); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 663 | va_end(args); |
| 664 | } |
| 665 | |
Andreas Dilger | b03a2f7 | 2015-06-15 14:50:26 -0400 | [diff] [blame] | 666 | void __ext4_warning_inode(const struct inode *inode, const char *function, |
| 667 | unsigned int line, const char *fmt, ...) |
| 668 | { |
| 669 | struct va_format vaf; |
| 670 | va_list args; |
| 671 | |
| 672 | if (!ext4_warning_ratelimit(inode->i_sb)) |
| 673 | return; |
| 674 | |
| 675 | va_start(args, fmt); |
| 676 | vaf.fmt = fmt; |
| 677 | vaf.va = &args; |
| 678 | printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: " |
| 679 | "inode #%lu: comm %s: %pV\n", inode->i_sb->s_id, |
| 680 | function, line, inode->i_ino, current->comm, &vaf); |
| 681 | va_end(args); |
| 682 | } |
| 683 | |
Theodore Ts'o | e29136f | 2010-06-29 12:54:28 -0400 | [diff] [blame] | 684 | void __ext4_grp_locked_error(const char *function, unsigned int line, |
| 685 | struct super_block *sb, ext4_group_t grp, |
| 686 | unsigned long ino, ext4_fsblk_t block, |
| 687 | const char *fmt, ...) |
Aneesh Kumar K.V | 5d1b1b3 | 2009-01-05 22:19:52 -0500 | [diff] [blame] | 688 | __releases(bitlock) |
| 689 | __acquires(bitlock) |
| 690 | { |
Joe Perches | 0ff2ea7 | 2010-12-19 22:43:19 -0500 | [diff] [blame] | 691 | struct va_format vaf; |
Aneesh Kumar K.V | 5d1b1b3 | 2009-01-05 22:19:52 -0500 | [diff] [blame] | 692 | va_list args; |
| 693 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
| 694 | |
Theodore Ts'o | 1c13d5c | 2010-07-27 11:56:03 -0400 | [diff] [blame] | 695 | es->s_last_error_ino = cpu_to_le32(ino); |
| 696 | es->s_last_error_block = cpu_to_le64(block); |
| 697 | __save_error_info(sb, function, line); |
Joe Perches | 0ff2ea7 | 2010-12-19 22:43:19 -0500 | [diff] [blame] | 698 | |
Theodore Ts'o | efbed4d | 2013-10-17 21:11:01 -0400 | [diff] [blame] | 699 | if (ext4_error_ratelimit(sb)) { |
| 700 | va_start(args, fmt); |
| 701 | vaf.fmt = fmt; |
| 702 | vaf.va = &args; |
| 703 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u, ", |
| 704 | sb->s_id, function, line, grp); |
| 705 | if (ino) |
| 706 | printk(KERN_CONT "inode %lu: ", ino); |
| 707 | if (block) |
| 708 | printk(KERN_CONT "block %llu:", |
| 709 | (unsigned long long) block); |
| 710 | printk(KERN_CONT "%pV\n", &vaf); |
| 711 | va_end(args); |
| 712 | } |
Aneesh Kumar K.V | 5d1b1b3 | 2009-01-05 22:19:52 -0500 | [diff] [blame] | 713 | |
| 714 | if (test_opt(sb, ERRORS_CONT)) { |
Theodore Ts'o | e2d6705 | 2009-05-01 00:33:44 -0400 | [diff] [blame] | 715 | ext4_commit_super(sb, 0); |
Aneesh Kumar K.V | 5d1b1b3 | 2009-01-05 22:19:52 -0500 | [diff] [blame] | 716 | return; |
| 717 | } |
Theodore Ts'o | 1c13d5c | 2010-07-27 11:56:03 -0400 | [diff] [blame] | 718 | |
Aneesh Kumar K.V | 5d1b1b3 | 2009-01-05 22:19:52 -0500 | [diff] [blame] | 719 | ext4_unlock_group(sb, grp); |
| 720 | ext4_handle_error(sb); |
| 721 | /* |
| 722 | * We only get here in the ERRORS_RO case; relocking the group |
| 723 | * may be dangerous, but nothing bad will happen since the |
| 724 | * filesystem will have already been marked read/only and the |
| 725 | * journal has been aborted. We return 1 as a hint to callers |
| 726 | * who might what to use the return value from |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 727 | * ext4_grp_locked_error() to distinguish between the |
Aneesh Kumar K.V | 5d1b1b3 | 2009-01-05 22:19:52 -0500 | [diff] [blame] | 728 | * ERRORS_CONT and ERRORS_RO case, and perhaps return more |
| 729 | * aggressively from the ext4 function in question, with a |
| 730 | * more appropriate error code. |
| 731 | */ |
| 732 | ext4_lock_group(sb, grp); |
| 733 | return; |
| 734 | } |
| 735 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 736 | void ext4_update_dynamic_rev(struct super_block *sb) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 737 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 738 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 739 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 740 | if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 741 | return; |
| 742 | |
Eric Sandeen | 12062dd | 2010-02-15 14:19:27 -0500 | [diff] [blame] | 743 | ext4_warning(sb, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 744 | "updating to rev %d because of new feature flag, " |
| 745 | "running e2fsck is recommended", |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 746 | EXT4_DYNAMIC_REV); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 747 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 748 | es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); |
| 749 | es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); |
| 750 | es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 751 | /* leave es->s_feature_*compat flags alone */ |
| 752 | /* es->s_uuid will be set by e2fsck if empty */ |
| 753 | |
| 754 | /* |
| 755 | * The rest of the superblock fields should be zero, and if not it |
| 756 | * means they are likely already in use, so leave them alone. We |
| 757 | * can leave it up to e2fsck to clean up any inconsistencies there. |
| 758 | */ |
| 759 | } |
| 760 | |
| 761 | /* |
| 762 | * Open the external journal device |
| 763 | */ |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 764 | 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] | 765 | { |
| 766 | struct block_device *bdev; |
| 767 | char b[BDEVNAME_SIZE]; |
| 768 | |
Tejun Heo | d4d7762 | 2010-11-13 11:55:18 +0100 | [diff] [blame] | 769 | 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] | 770 | if (IS_ERR(bdev)) |
| 771 | goto fail; |
| 772 | return bdev; |
| 773 | |
| 774 | fail: |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 775 | ext4_msg(sb, KERN_ERR, "failed to open journal device %s: %ld", |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 776 | __bdevname(dev, b), PTR_ERR(bdev)); |
| 777 | return NULL; |
| 778 | } |
| 779 | |
| 780 | /* |
| 781 | * Release the journal device |
| 782 | */ |
Al Viro | 4385bab | 2013-05-05 22:11:03 -0400 | [diff] [blame] | 783 | static void ext4_blkdev_put(struct block_device *bdev) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 784 | { |
Al Viro | 4385bab | 2013-05-05 22:11:03 -0400 | [diff] [blame] | 785 | blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 786 | } |
| 787 | |
Al Viro | 4385bab | 2013-05-05 22:11:03 -0400 | [diff] [blame] | 788 | static void ext4_blkdev_remove(struct ext4_sb_info *sbi) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 789 | { |
| 790 | struct block_device *bdev; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 791 | bdev = sbi->journal_bdev; |
| 792 | if (bdev) { |
Al Viro | 4385bab | 2013-05-05 22:11:03 -0400 | [diff] [blame] | 793 | ext4_blkdev_put(bdev); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 794 | sbi->journal_bdev = NULL; |
| 795 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 796 | } |
| 797 | |
| 798 | static inline struct inode *orphan_list_entry(struct list_head *l) |
| 799 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 800 | return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 801 | } |
| 802 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 803 | 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] | 804 | { |
| 805 | struct list_head *l; |
| 806 | |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 807 | ext4_msg(sb, KERN_ERR, "sb orphan head is %d", |
| 808 | le32_to_cpu(sbi->s_es->s_last_orphan)); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 809 | |
| 810 | printk(KERN_ERR "sb_info orphan list:\n"); |
| 811 | list_for_each(l, &sbi->s_orphan) { |
| 812 | struct inode *inode = orphan_list_entry(l); |
| 813 | printk(KERN_ERR " " |
| 814 | "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", |
| 815 | inode->i_sb->s_id, inode->i_ino, inode, |
| 816 | inode->i_mode, inode->i_nlink, |
| 817 | NEXT_ORPHAN(inode)); |
| 818 | } |
| 819 | } |
| 820 | |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 821 | static void ext4_put_super(struct super_block *sb) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 822 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 823 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
| 824 | struct ext4_super_block *es = sbi->s_es; |
Hidehiro Kawai | ef2cabf | 2008-10-27 22:53:05 -0400 | [diff] [blame] | 825 | int i, err; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 826 | |
Lukas Czerner | 857ac88 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 827 | ext4_unregister_li_request(sb); |
Christoph Hellwig | e0ccfd9 | 2010-05-19 07:16:42 -0400 | [diff] [blame] | 828 | dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); |
| 829 | |
Jan Kara | 2e8fa54 | 2013-06-04 14:21:02 -0400 | [diff] [blame] | 830 | flush_workqueue(sbi->rsv_conversion_wq); |
Jan Kara | 2e8fa54 | 2013-06-04 14:21:02 -0400 | [diff] [blame] | 831 | destroy_workqueue(sbi->rsv_conversion_wq); |
Mingming Cao | 4c0425f | 2009-09-28 15:48:41 -0400 | [diff] [blame] | 832 | |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 833 | if (sbi->s_journal) { |
| 834 | err = jbd2_journal_destroy(sbi->s_journal); |
| 835 | sbi->s_journal = NULL; |
| 836 | if (err < 0) |
Theodore Ts'o | c67d859 | 2010-06-29 11:07:07 -0400 | [diff] [blame] | 837 | ext4_abort(sb, "Couldn't clean up the journal"); |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 838 | } |
Josef Bacik | d4edac3 | 2009-12-08 21:48:58 -0500 | [diff] [blame] | 839 | |
Theodore Ts'o | ebd173b | 2015-09-23 12:46:17 -0400 | [diff] [blame] | 840 | ext4_unregister_sysfs(sb); |
Zheng Liu | d3922a7 | 2013-07-01 08:12:37 -0400 | [diff] [blame] | 841 | ext4_es_unregister_shrinker(sbi); |
Al Viro | 9105bb1 | 2013-12-08 20:52:31 -0500 | [diff] [blame] | 842 | del_timer_sync(&sbi->s_err_report); |
Josef Bacik | d4edac3 | 2009-12-08 21:48:58 -0500 | [diff] [blame] | 843 | ext4_release_system_zone(sb); |
| 844 | ext4_mb_release(sb); |
| 845 | ext4_ext_release(sb); |
Josef Bacik | d4edac3 | 2009-12-08 21:48:58 -0500 | [diff] [blame] | 846 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 847 | if (!(sb->s_flags & MS_RDONLY)) { |
Darrick J. Wong | e2b911c | 2015-10-17 16:18:43 -0400 | [diff] [blame] | 848 | ext4_clear_feature_journal_needs_recovery(sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 849 | es->s_state = cpu_to_le16(sbi->s_mount_state); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 850 | } |
Artem Bityutskiy | 58c5873 | 2012-07-22 20:33:31 -0400 | [diff] [blame] | 851 | if (!(sb->s_flags & MS_RDONLY)) |
Artem Bityutskiy | a8e25a8 | 2012-03-21 22:29:15 -0400 | [diff] [blame] | 852 | ext4_commit_super(sb, 1); |
| 853 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 854 | for (i = 0; i < sbi->s_gdb_count; i++) |
| 855 | brelse(sbi->s_group_desc[i]); |
Al Viro | b93b41d | 2014-11-20 12:19:11 -0500 | [diff] [blame] | 856 | kvfree(sbi->s_group_desc); |
| 857 | kvfree(sbi->s_flex_groups); |
Theodore Ts'o | 5704265 | 2011-09-09 18:56:51 -0400 | [diff] [blame] | 858 | percpu_counter_destroy(&sbi->s_freeclusters_counter); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 859 | percpu_counter_destroy(&sbi->s_freeinodes_counter); |
| 860 | percpu_counter_destroy(&sbi->s_dirs_counter); |
Theodore Ts'o | 5704265 | 2011-09-09 18:56:51 -0400 | [diff] [blame] | 861 | percpu_counter_destroy(&sbi->s_dirtyclusters_counter); |
Daeho Jeong | c8585c6 | 2016-04-25 23:22:35 -0400 | [diff] [blame] | 862 | percpu_free_rwsem(&sbi->s_journal_flag_rwsem); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 863 | brelse(sbi->s_sbh); |
| 864 | #ifdef CONFIG_QUOTA |
Jan Kara | a2d4a64 | 2014-09-11 11:15:15 -0400 | [diff] [blame] | 865 | for (i = 0; i < EXT4_MAXQUOTAS; i++) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 866 | kfree(sbi->s_qf_names[i]); |
| 867 | #endif |
| 868 | |
| 869 | /* Debugging code just in case the in-memory inode orphan list |
| 870 | * isn't empty. The on-disk one can be non-empty if we've |
| 871 | * detected an error and taken the fs readonly, but the |
| 872 | * in-memory list had better be clean by this point. */ |
| 873 | if (!list_empty(&sbi->s_orphan)) |
| 874 | dump_orphan_list(sb, sbi); |
| 875 | J_ASSERT(list_empty(&sbi->s_orphan)); |
| 876 | |
Theodore Ts'o | 89d96a6 | 2015-06-20 22:50:33 -0400 | [diff] [blame] | 877 | sync_blockdev(sb->s_bdev); |
Peter Zijlstra | f98393a | 2007-05-06 14:49:54 -0700 | [diff] [blame] | 878 | invalidate_bdev(sb->s_bdev); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 879 | if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { |
| 880 | /* |
| 881 | * Invalidate the journal device's buffers. We don't want them |
| 882 | * floating about in memory - the physical journal device may |
| 883 | * hotswapped, and it breaks the `ro-after' testing code. |
| 884 | */ |
| 885 | sync_blockdev(sbi->journal_bdev); |
Peter Zijlstra | f98393a | 2007-05-06 14:49:54 -0700 | [diff] [blame] | 886 | invalidate_bdev(sbi->journal_bdev); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 887 | ext4_blkdev_remove(sbi); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 888 | } |
T Makphaibulchoke | 9c191f7 | 2014-03-18 19:24:49 -0400 | [diff] [blame] | 889 | if (sbi->s_mb_cache) { |
| 890 | ext4_xattr_destroy_cache(sbi->s_mb_cache); |
| 891 | sbi->s_mb_cache = NULL; |
| 892 | } |
Johann Lombardi | c5e06d1 | 2011-05-24 18:31:25 -0400 | [diff] [blame] | 893 | if (sbi->s_mmp_tsk) |
| 894 | kthread_stop(sbi->s_mmp_tsk); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 895 | sb->s_fs_info = NULL; |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 896 | /* |
| 897 | * Now that we are completely done shutting down the |
| 898 | * superblock, we need to actually destroy the kobject. |
| 899 | */ |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 900 | kobject_put(&sbi->s_kobj); |
| 901 | wait_for_completion(&sbi->s_kobj_unregister); |
Darrick J. Wong | 0441984 | 2012-04-29 18:27:10 -0400 | [diff] [blame] | 902 | if (sbi->s_chksum_driver) |
| 903 | crypto_free_shash(sbi->s_chksum_driver); |
Pekka Enberg | 705895b | 2009-02-15 18:07:52 -0500 | [diff] [blame] | 904 | kfree(sbi->s_blockgroup_lock); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 905 | kfree(sbi); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 906 | } |
| 907 | |
Christoph Lameter | e18b890 | 2006-12-06 20:33:20 -0800 | [diff] [blame] | 908 | static struct kmem_cache *ext4_inode_cachep; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 909 | |
| 910 | /* |
| 911 | * Called inside transaction, so use GFP_NOFS |
| 912 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 913 | static struct inode *ext4_alloc_inode(struct super_block *sb) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 914 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 915 | struct ext4_inode_info *ei; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 916 | |
Christoph Lameter | e6b4f8d | 2006-12-06 20:33:14 -0800 | [diff] [blame] | 917 | ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 918 | if (!ei) |
| 919 | return NULL; |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 920 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 921 | ei->vfs_inode.i_version = 1; |
Theodore Ts'o | 202ee5d | 2014-04-21 14:37:55 -0400 | [diff] [blame] | 922 | spin_lock_init(&ei->i_raw_lock); |
Alex Tomas | c9de560 | 2008-01-29 00:19:52 -0500 | [diff] [blame] | 923 | INIT_LIST_HEAD(&ei->i_prealloc_list); |
| 924 | spin_lock_init(&ei->i_prealloc_lock); |
Zheng Liu | 9a26b66 | 2012-11-08 21:57:30 -0500 | [diff] [blame] | 925 | ext4_es_init_tree(&ei->i_es_tree); |
| 926 | rwlock_init(&ei->i_es_lock); |
Zheng Liu | edaa53c | 2014-11-25 11:45:37 -0500 | [diff] [blame] | 927 | INIT_LIST_HEAD(&ei->i_es_list); |
Zheng Liu | eb68d0e | 2014-09-01 22:26:49 -0400 | [diff] [blame] | 928 | ei->i_es_all_nr = 0; |
Zheng Liu | edaa53c | 2014-11-25 11:45:37 -0500 | [diff] [blame] | 929 | ei->i_es_shk_nr = 0; |
Jan Kara | dd47592 | 2014-11-25 11:51:23 -0500 | [diff] [blame] | 930 | ei->i_es_shrink_lblk = 0; |
Mingming Cao | d2a1763 | 2008-07-14 17:52:37 -0400 | [diff] [blame] | 931 | ei->i_reserved_data_blocks = 0; |
| 932 | ei->i_reserved_meta_blocks = 0; |
| 933 | ei->i_allocated_meta_blocks = 0; |
Theodore Ts'o | 9d0be50 | 2010-01-01 02:41:30 -0500 | [diff] [blame] | 934 | ei->i_da_metadata_calc_len = 0; |
Theodore Ts'o | 7e731bc | 2012-08-05 23:28:16 -0400 | [diff] [blame] | 935 | ei->i_da_metadata_calc_last_lblock = 0; |
Mingming Cao | d2a1763 | 2008-07-14 17:52:37 -0400 | [diff] [blame] | 936 | spin_lock_init(&(ei->i_block_reservation_lock)); |
Dmitry Monakhov | a9e7f44 | 2009-12-14 15:21:14 +0300 | [diff] [blame] | 937 | #ifdef CONFIG_QUOTA |
| 938 | ei->i_reserved_quota = 0; |
Jan Kara | 96c7e0d | 2014-09-29 14:58:25 +0200 | [diff] [blame] | 939 | memset(&ei->i_dquot, 0, sizeof(ei->i_dquot)); |
Dmitry Monakhov | a9e7f44 | 2009-12-14 15:21:14 +0300 | [diff] [blame] | 940 | #endif |
Theodore Ts'o | 8aefcd5 | 2011-01-10 12:29:43 -0500 | [diff] [blame] | 941 | ei->jinode = NULL; |
Jan Kara | 2e8fa54 | 2013-06-04 14:21:02 -0400 | [diff] [blame] | 942 | INIT_LIST_HEAD(&ei->i_rsv_conversion_list); |
Jiaying Zhang | 744692d | 2010-03-04 16:14:02 -0500 | [diff] [blame] | 943 | spin_lock_init(&ei->i_completed_io_lock); |
Jan Kara | b436b9b | 2009-12-08 23:51:10 -0500 | [diff] [blame] | 944 | ei->i_sync_tid = 0; |
| 945 | ei->i_datasync_tid = 0; |
Dmitry Monakhov | e27f41e | 2012-09-28 23:24:52 -0400 | [diff] [blame] | 946 | atomic_set(&ei->i_unwritten, 0); |
Jan Kara | 2e8fa54 | 2013-06-04 14:21:02 -0400 | [diff] [blame] | 947 | INIT_WORK(&ei->i_rsv_conversion_work, ext4_end_io_rsv_work); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 948 | return &ei->vfs_inode; |
| 949 | } |
| 950 | |
Theodore Ts'o | 7ff9c07 | 2010-11-08 13:51:33 -0500 | [diff] [blame] | 951 | static int ext4_drop_inode(struct inode *inode) |
| 952 | { |
| 953 | int drop = generic_drop_inode(inode); |
| 954 | |
| 955 | trace_ext4_drop_inode(inode, drop); |
| 956 | return drop; |
| 957 | } |
| 958 | |
Nick Piggin | fa0d7e3d | 2011-01-07 17:49:49 +1100 | [diff] [blame] | 959 | static void ext4_i_callback(struct rcu_head *head) |
| 960 | { |
| 961 | struct inode *inode = container_of(head, struct inode, i_rcu); |
Nick Piggin | fa0d7e3d | 2011-01-07 17:49:49 +1100 | [diff] [blame] | 962 | kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); |
| 963 | } |
| 964 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 965 | static void ext4_destroy_inode(struct inode *inode) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 966 | { |
Vasily Averin | 9f7dd93 | 2007-07-15 23:40:45 -0700 | [diff] [blame] | 967 | if (!list_empty(&(EXT4_I(inode)->i_orphan))) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 968 | ext4_msg(inode->i_sb, KERN_ERR, |
| 969 | "Inode %lu (%p): orphan list check failed!", |
| 970 | inode->i_ino, EXT4_I(inode)); |
Vasily Averin | 9f7dd93 | 2007-07-15 23:40:45 -0700 | [diff] [blame] | 971 | print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, |
| 972 | EXT4_I(inode), sizeof(struct ext4_inode_info), |
| 973 | true); |
| 974 | dump_stack(); |
| 975 | } |
Nick Piggin | fa0d7e3d | 2011-01-07 17:49:49 +1100 | [diff] [blame] | 976 | call_rcu(&inode->i_rcu, ext4_i_callback); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 977 | } |
| 978 | |
Alexey Dobriyan | 51cc506 | 2008-07-25 19:45:34 -0700 | [diff] [blame] | 979 | static void init_once(void *foo) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 980 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 981 | struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 982 | |
Christoph Lameter | a35afb8 | 2007-05-16 22:10:57 -0700 | [diff] [blame] | 983 | INIT_LIST_HEAD(&ei->i_orphan); |
Christoph Lameter | a35afb8 | 2007-05-16 22:10:57 -0700 | [diff] [blame] | 984 | init_rwsem(&ei->xattr_sem); |
Aneesh Kumar K.V | 0e855ac | 2008-01-28 23:58:26 -0500 | [diff] [blame] | 985 | init_rwsem(&ei->i_data_sem); |
Jan Kara | ea3d720 | 2015-12-07 14:28:03 -0500 | [diff] [blame] | 986 | init_rwsem(&ei->i_mmap_sem); |
Christoph Lameter | a35afb8 | 2007-05-16 22:10:57 -0700 | [diff] [blame] | 987 | inode_init_once(&ei->vfs_inode); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 988 | } |
| 989 | |
Fabian Frederick | e67bc2b | 2014-02-17 20:34:53 -0500 | [diff] [blame] | 990 | static int __init init_inodecache(void) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 991 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 992 | ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", |
| 993 | sizeof(struct ext4_inode_info), |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 994 | 0, (SLAB_RECLAIM_ACCOUNT| |
Vladimir Davydov | 5d09705 | 2016-01-14 15:18:21 -0800 | [diff] [blame] | 995 | SLAB_MEM_SPREAD|SLAB_ACCOUNT), |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 996 | init_once); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 997 | if (ext4_inode_cachep == NULL) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 998 | return -ENOMEM; |
| 999 | return 0; |
| 1000 | } |
| 1001 | |
| 1002 | static void destroy_inodecache(void) |
| 1003 | { |
Kirill A. Shutemov | 8c0a853 | 2012-09-26 11:33:07 +1000 | [diff] [blame] | 1004 | /* |
| 1005 | * Make sure all delayed rcu free inodes are flushed before we |
| 1006 | * destroy cache. |
| 1007 | */ |
| 1008 | rcu_barrier(); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1009 | kmem_cache_destroy(ext4_inode_cachep); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1010 | } |
| 1011 | |
Al Viro | 0930fcc | 2010-06-07 13:16:22 -0400 | [diff] [blame] | 1012 | void ext4_clear_inode(struct inode *inode) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1013 | { |
Al Viro | 0930fcc | 2010-06-07 13:16:22 -0400 | [diff] [blame] | 1014 | invalidate_inode_buffers(inode); |
Jan Kara | dbd5768 | 2012-05-03 14:48:02 +0200 | [diff] [blame] | 1015 | clear_inode(inode); |
Christoph Hellwig | 9f75475 | 2010-03-03 09:05:05 -0500 | [diff] [blame] | 1016 | dquot_drop(inode); |
Theodore Ts'o | c2ea3fd | 2008-10-10 09:40:52 -0400 | [diff] [blame] | 1017 | ext4_discard_preallocations(inode); |
Zheng Liu | 51865fd | 2012-11-08 21:57:32 -0500 | [diff] [blame] | 1018 | ext4_es_remove_extent(inode, 0, EXT_MAX_BLOCKS); |
Theodore Ts'o | 8aefcd5 | 2011-01-10 12:29:43 -0500 | [diff] [blame] | 1019 | if (EXT4_I(inode)->jinode) { |
| 1020 | jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), |
| 1021 | EXT4_I(inode)->jinode); |
| 1022 | jbd2_free_inode(EXT4_I(inode)->jinode); |
| 1023 | EXT4_I(inode)->jinode = NULL; |
| 1024 | } |
Theodore Ts'o | b7236e2 | 2015-05-18 13:17:47 -0400 | [diff] [blame] | 1025 | #ifdef CONFIG_EXT4_FS_ENCRYPTION |
Jaegeuk Kim | a7550b3 | 2016-07-10 14:01:03 -0400 | [diff] [blame] | 1026 | fscrypt_put_encryption_info(inode, NULL); |
Theodore Ts'o | b7236e2 | 2015-05-18 13:17:47 -0400 | [diff] [blame] | 1027 | #endif |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1028 | } |
| 1029 | |
Christoph Hellwig | 1b961ac | 2007-10-21 16:42:08 -0700 | [diff] [blame] | 1030 | static struct inode *ext4_nfs_get_inode(struct super_block *sb, |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 1031 | u64 ino, u32 generation) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1032 | { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1033 | struct inode *inode; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1034 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1035 | if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1036 | return ERR_PTR(-ESTALE); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1037 | 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] | 1038 | return ERR_PTR(-ESTALE); |
| 1039 | |
| 1040 | /* iget isn't really right if the inode is currently unallocated!! |
| 1041 | * |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1042 | * 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] | 1043 | * deleted, so we should be safe. |
| 1044 | * |
| 1045 | * Currently we don't know the generation for parent directory, so |
| 1046 | * a generation of 0 means "accept any" |
| 1047 | */ |
Theodore Ts'o | f4bb298 | 2014-10-05 22:56:00 -0400 | [diff] [blame] | 1048 | inode = ext4_iget_normal(sb, ino); |
David Howells | 1d1fe1e | 2008-02-07 00:15:37 -0800 | [diff] [blame] | 1049 | if (IS_ERR(inode)) |
| 1050 | return ERR_CAST(inode); |
| 1051 | if (generation && inode->i_generation != generation) { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1052 | iput(inode); |
| 1053 | return ERR_PTR(-ESTALE); |
| 1054 | } |
Christoph Hellwig | 1b961ac | 2007-10-21 16:42:08 -0700 | [diff] [blame] | 1055 | |
| 1056 | return inode; |
| 1057 | } |
| 1058 | |
| 1059 | 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] | 1060 | int fh_len, int fh_type) |
Christoph Hellwig | 1b961ac | 2007-10-21 16:42:08 -0700 | [diff] [blame] | 1061 | { |
| 1062 | return generic_fh_to_dentry(sb, fid, fh_len, fh_type, |
| 1063 | ext4_nfs_get_inode); |
| 1064 | } |
| 1065 | |
| 1066 | 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] | 1067 | int fh_len, int fh_type) |
Christoph Hellwig | 1b961ac | 2007-10-21 16:42:08 -0700 | [diff] [blame] | 1068 | { |
| 1069 | return generic_fh_to_parent(sb, fid, fh_len, fh_type, |
| 1070 | ext4_nfs_get_inode); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1071 | } |
| 1072 | |
Toshiyuki Okajima | c39a7f8 | 2009-01-05 22:38:48 -0500 | [diff] [blame] | 1073 | /* |
| 1074 | * Try to release metadata pages (indirect blocks, directories) which are |
| 1075 | * mapped via the block device. Since these pages could have journal heads |
| 1076 | * which would prevent try_to_free_buffers() from freeing them, we must use |
| 1077 | * jbd2 layer's try_to_free_buffers() function to release them. |
| 1078 | */ |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 1079 | static int bdev_try_to_free_page(struct super_block *sb, struct page *page, |
| 1080 | gfp_t wait) |
Toshiyuki Okajima | c39a7f8 | 2009-01-05 22:38:48 -0500 | [diff] [blame] | 1081 | { |
| 1082 | journal_t *journal = EXT4_SB(sb)->s_journal; |
| 1083 | |
| 1084 | WARN_ON(PageChecked(page)); |
| 1085 | if (!page_has_buffers(page)) |
| 1086 | return 0; |
| 1087 | if (journal) |
| 1088 | return jbd2_journal_try_to_free_buffers(journal, page, |
Mel Gorman | d0164ad | 2015-11-06 16:28:21 -0800 | [diff] [blame] | 1089 | wait & ~__GFP_DIRECT_RECLAIM); |
Toshiyuki Okajima | c39a7f8 | 2009-01-05 22:38:48 -0500 | [diff] [blame] | 1090 | return try_to_free_buffers(page); |
| 1091 | } |
| 1092 | |
Jaegeuk Kim | a7550b3 | 2016-07-10 14:01:03 -0400 | [diff] [blame] | 1093 | #ifdef CONFIG_EXT4_FS_ENCRYPTION |
| 1094 | static int ext4_get_context(struct inode *inode, void *ctx, size_t len) |
| 1095 | { |
| 1096 | return ext4_xattr_get(inode, EXT4_XATTR_INDEX_ENCRYPTION, |
| 1097 | EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, ctx, len); |
| 1098 | } |
| 1099 | |
| 1100 | static int ext4_key_prefix(struct inode *inode, u8 **key) |
| 1101 | { |
| 1102 | *key = EXT4_SB(inode->i_sb)->key_prefix; |
| 1103 | return EXT4_SB(inode->i_sb)->key_prefix_size; |
| 1104 | } |
| 1105 | |
| 1106 | static int ext4_prepare_context(struct inode *inode) |
| 1107 | { |
| 1108 | return ext4_convert_inline_data(inode); |
| 1109 | } |
| 1110 | |
| 1111 | static int ext4_set_context(struct inode *inode, const void *ctx, size_t len, |
| 1112 | void *fs_data) |
| 1113 | { |
| 1114 | handle_t *handle; |
| 1115 | int res, res2; |
| 1116 | |
| 1117 | /* fs_data is null when internally used. */ |
| 1118 | if (fs_data) { |
| 1119 | res = ext4_xattr_set(inode, EXT4_XATTR_INDEX_ENCRYPTION, |
| 1120 | EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, ctx, |
| 1121 | len, 0); |
| 1122 | if (!res) { |
| 1123 | ext4_set_inode_flag(inode, EXT4_INODE_ENCRYPT); |
| 1124 | ext4_clear_inode_state(inode, |
| 1125 | EXT4_STATE_MAY_INLINE_DATA); |
| 1126 | } |
| 1127 | return res; |
| 1128 | } |
| 1129 | |
| 1130 | handle = ext4_journal_start(inode, EXT4_HT_MISC, |
| 1131 | ext4_jbd2_credits_xattr(inode)); |
| 1132 | if (IS_ERR(handle)) |
| 1133 | return PTR_ERR(handle); |
| 1134 | |
| 1135 | res = ext4_xattr_set(inode, EXT4_XATTR_INDEX_ENCRYPTION, |
| 1136 | EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, ctx, |
| 1137 | len, 0); |
| 1138 | if (!res) { |
| 1139 | ext4_set_inode_flag(inode, EXT4_INODE_ENCRYPT); |
| 1140 | res = ext4_mark_inode_dirty(handle, inode); |
| 1141 | if (res) |
| 1142 | EXT4_ERROR_INODE(inode, "Failed to mark inode dirty"); |
| 1143 | } |
| 1144 | res2 = ext4_journal_stop(handle); |
| 1145 | if (!res) |
| 1146 | res = res2; |
| 1147 | return res; |
| 1148 | } |
| 1149 | |
| 1150 | static int ext4_dummy_context(struct inode *inode) |
| 1151 | { |
| 1152 | return DUMMY_ENCRYPTION_ENABLED(EXT4_SB(inode->i_sb)); |
| 1153 | } |
| 1154 | |
| 1155 | static unsigned ext4_max_namelen(struct inode *inode) |
| 1156 | { |
| 1157 | return S_ISLNK(inode->i_mode) ? inode->i_sb->s_blocksize : |
| 1158 | EXT4_NAME_LEN; |
| 1159 | } |
| 1160 | |
| 1161 | static struct fscrypt_operations ext4_cryptops = { |
| 1162 | .get_context = ext4_get_context, |
| 1163 | .key_prefix = ext4_key_prefix, |
| 1164 | .prepare_context = ext4_prepare_context, |
| 1165 | .set_context = ext4_set_context, |
| 1166 | .dummy_context = ext4_dummy_context, |
| 1167 | .is_encrypted = ext4_encrypted_inode, |
| 1168 | .empty_dir = ext4_empty_dir, |
| 1169 | .max_namelen = ext4_max_namelen, |
| 1170 | }; |
| 1171 | #else |
| 1172 | static struct fscrypt_operations ext4_cryptops = { |
| 1173 | .is_encrypted = ext4_encrypted_inode, |
| 1174 | }; |
| 1175 | #endif |
| 1176 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1177 | #ifdef CONFIG_QUOTA |
Li Xi | 689c958 | 2016-01-08 16:01:22 -0500 | [diff] [blame] | 1178 | static char *quotatypes[] = INITQFNAMES; |
| 1179 | #define QTYPE2NAME(t) (quotatypes[t]) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1180 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1181 | static int ext4_write_dquot(struct dquot *dquot); |
| 1182 | static int ext4_acquire_dquot(struct dquot *dquot); |
| 1183 | static int ext4_release_dquot(struct dquot *dquot); |
| 1184 | static int ext4_mark_dquot_dirty(struct dquot *dquot); |
| 1185 | static int ext4_write_info(struct super_block *sb, int type); |
Jan Kara | 6f28e08 | 2008-04-28 02:14:34 -0700 | [diff] [blame] | 1186 | 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] | 1187 | struct path *path); |
Dmitry Monakhov | ca0e05e | 2010-08-01 17:48:36 -0400 | [diff] [blame] | 1188 | static int ext4_quota_off(struct super_block *sb, int type); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1189 | static int ext4_quota_on_mount(struct super_block *sb, int type); |
| 1190 | 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] | 1191 | size_t len, loff_t off); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1192 | static ssize_t ext4_quota_write(struct super_block *sb, int type, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1193 | const char *data, size_t len, loff_t off); |
Aditya Kali | 7c319d3 | 2012-07-22 20:21:31 -0400 | [diff] [blame] | 1194 | static int ext4_quota_enable(struct super_block *sb, int type, int format_id, |
| 1195 | unsigned int flags); |
| 1196 | static int ext4_enable_quotas(struct super_block *sb); |
Theodore Ts'o | 8f0e874 | 2016-04-01 12:00:03 -0400 | [diff] [blame] | 1197 | static int ext4_get_next_id(struct super_block *sb, struct kqid *qid); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1198 | |
Jan Kara | 96c7e0d | 2014-09-29 14:58:25 +0200 | [diff] [blame] | 1199 | static struct dquot **ext4_get_dquots(struct inode *inode) |
| 1200 | { |
| 1201 | return EXT4_I(inode)->i_dquot; |
| 1202 | } |
| 1203 | |
Alexey Dobriyan | 61e225d | 2009-09-21 17:01:08 -0700 | [diff] [blame] | 1204 | static const struct dquot_operations ext4_quota_operations = { |
Mingming Cao | 60e58e0 | 2009-01-22 18:13:05 +0100 | [diff] [blame] | 1205 | .get_reserved_space = ext4_get_reserved_space, |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1206 | .write_dquot = ext4_write_dquot, |
| 1207 | .acquire_dquot = ext4_acquire_dquot, |
| 1208 | .release_dquot = ext4_release_dquot, |
| 1209 | .mark_dirty = ext4_mark_dquot_dirty, |
Jan Kara | a5b5ee3 | 2008-11-25 15:31:35 +0100 | [diff] [blame] | 1210 | .write_info = ext4_write_info, |
| 1211 | .alloc_dquot = dquot_alloc, |
| 1212 | .destroy_dquot = dquot_destroy, |
Li Xi | 040cb37 | 2016-01-08 16:01:21 -0500 | [diff] [blame] | 1213 | .get_projid = ext4_get_projid, |
Theodore Ts'o | 8f0e874 | 2016-04-01 12:00:03 -0400 | [diff] [blame] | 1214 | .get_next_id = ext4_get_next_id, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1215 | }; |
| 1216 | |
Alexey Dobriyan | 0d54b21 | 2009-09-21 17:01:09 -0700 | [diff] [blame] | 1217 | static const struct quotactl_ops ext4_qctl_operations = { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1218 | .quota_on = ext4_quota_on, |
Dmitry Monakhov | ca0e05e | 2010-08-01 17:48:36 -0400 | [diff] [blame] | 1219 | .quota_off = ext4_quota_off, |
Christoph Hellwig | 287a809 | 2010-05-19 07:16:45 -0400 | [diff] [blame] | 1220 | .quota_sync = dquot_quota_sync, |
Jan Kara | 0a240339 | 2014-11-19 00:42:09 +0100 | [diff] [blame] | 1221 | .get_state = dquot_get_state, |
Christoph Hellwig | 287a809 | 2010-05-19 07:16:45 -0400 | [diff] [blame] | 1222 | .set_info = dquot_set_dqinfo, |
| 1223 | .get_dqblk = dquot_get_dqblk, |
Eric Sandeen | 6332b9b | 2016-02-19 19:19:01 +0100 | [diff] [blame] | 1224 | .set_dqblk = dquot_set_dqblk, |
| 1225 | .get_nextdqblk = dquot_get_next_dqblk, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1226 | }; |
| 1227 | #endif |
| 1228 | |
Josef 'Jeff' Sipek | ee9b6d6 | 2007-02-12 00:55:41 -0800 | [diff] [blame] | 1229 | static const struct super_operations ext4_sops = { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1230 | .alloc_inode = ext4_alloc_inode, |
| 1231 | .destroy_inode = ext4_destroy_inode, |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1232 | .write_inode = ext4_write_inode, |
| 1233 | .dirty_inode = ext4_dirty_inode, |
Theodore Ts'o | 7ff9c07 | 2010-11-08 13:51:33 -0500 | [diff] [blame] | 1234 | .drop_inode = ext4_drop_inode, |
Al Viro | 0930fcc | 2010-06-07 13:16:22 -0400 | [diff] [blame] | 1235 | .evict_inode = ext4_evict_inode, |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1236 | .put_super = ext4_put_super, |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1237 | .sync_fs = ext4_sync_fs, |
Takashi Sato | c4be0c1 | 2009-01-09 16:40:58 -0800 | [diff] [blame] | 1238 | .freeze_fs = ext4_freeze, |
| 1239 | .unfreeze_fs = ext4_unfreeze, |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1240 | .statfs = ext4_statfs, |
| 1241 | .remount_fs = ext4_remount, |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1242 | .show_options = ext4_show_options, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1243 | #ifdef CONFIG_QUOTA |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1244 | .quota_read = ext4_quota_read, |
| 1245 | .quota_write = ext4_quota_write, |
Jan Kara | 96c7e0d | 2014-09-29 14:58:25 +0200 | [diff] [blame] | 1246 | .get_dquots = ext4_get_dquots, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1247 | #endif |
Toshiyuki Okajima | c39a7f8 | 2009-01-05 22:38:48 -0500 | [diff] [blame] | 1248 | .bdev_try_to_free_page = bdev_try_to_free_page, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1249 | }; |
| 1250 | |
Christoph Hellwig | 3965516 | 2007-10-21 16:42:17 -0700 | [diff] [blame] | 1251 | static const struct export_operations ext4_export_ops = { |
Christoph Hellwig | 1b961ac | 2007-10-21 16:42:08 -0700 | [diff] [blame] | 1252 | .fh_to_dentry = ext4_fh_to_dentry, |
| 1253 | .fh_to_parent = ext4_fh_to_parent, |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1254 | .get_parent = ext4_get_parent, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1255 | }; |
| 1256 | |
| 1257 | enum { |
| 1258 | Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, |
| 1259 | 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] | 1260 | Opt_nouid32, Opt_debug, Opt_removed, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1261 | Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, |
Theodore Ts'o | 72578c3 | 2012-03-03 18:04:40 -0500 | [diff] [blame] | 1262 | Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, |
Eric Sandeen | ad4eec6 | 2013-08-28 19:05:07 -0400 | [diff] [blame] | 1263 | Opt_commit, Opt_min_batch_time, Opt_max_batch_time, Opt_journal_dev, |
| 1264 | Opt_journal_path, Opt_journal_checksum, Opt_journal_async_commit, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1265 | Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, |
Theodore Ts'o | 6ddb244 | 2015-04-16 01:56:00 -0400 | [diff] [blame] | 1266 | Opt_data_err_abort, Opt_data_err_ignore, Opt_test_dummy_encryption, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1267 | Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, |
Jan Kara | 5a20bdf | 2009-11-30 23:58:32 +0100 | [diff] [blame] | 1268 | Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, |
Theodore Ts'o | ee4a3fc | 2012-03-02 12:14:24 -0500 | [diff] [blame] | 1269 | Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err, |
Ross Zwisler | 923ae0f | 2015-02-16 15:59:38 -0800 | [diff] [blame] | 1270 | Opt_usrquota, Opt_grpquota, Opt_i_version, Opt_dax, |
Theodore Ts'o | 1449032 | 2010-12-14 15:27:50 -0500 | [diff] [blame] | 1271 | Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_mblk_io_submit, |
Theodore Ts'o | a26f499 | 2015-02-02 00:37:02 -0500 | [diff] [blame] | 1272 | Opt_lazytime, Opt_nolazytime, |
Theodore Ts'o | 1449032 | 2010-12-14 15:27:50 -0500 | [diff] [blame] | 1273 | Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, |
Eric Sandeen | 5328e63 | 2009-11-19 14:25:42 -0500 | [diff] [blame] | 1274 | Opt_inode_readahead_blks, Opt_journal_ioprio, |
Jiaying Zhang | 744692d | 2010-03-04 16:14:02 -0500 | [diff] [blame] | 1275 | Opt_dioread_nolock, Opt_dioread_lock, |
Theodore Ts'o | fc6cb1c | 2011-12-12 22:06:18 -0500 | [diff] [blame] | 1276 | Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable, |
Darrick J. Wong | c6d3d56 | 2014-11-25 16:20:50 -0500 | [diff] [blame] | 1277 | Opt_max_dir_size_kb, Opt_nojournal_checksum, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1278 | }; |
| 1279 | |
Steven Whitehouse | a447c09 | 2008-10-13 10:46:57 +0100 | [diff] [blame] | 1280 | static const match_table_t tokens = { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1281 | {Opt_bsd_df, "bsddf"}, |
| 1282 | {Opt_minix_df, "minixdf"}, |
| 1283 | {Opt_grpid, "grpid"}, |
| 1284 | {Opt_grpid, "bsdgroups"}, |
| 1285 | {Opt_nogrpid, "nogrpid"}, |
| 1286 | {Opt_nogrpid, "sysvgroups"}, |
| 1287 | {Opt_resgid, "resgid=%u"}, |
| 1288 | {Opt_resuid, "resuid=%u"}, |
| 1289 | {Opt_sb, "sb=%u"}, |
| 1290 | {Opt_err_cont, "errors=continue"}, |
| 1291 | {Opt_err_panic, "errors=panic"}, |
| 1292 | {Opt_err_ro, "errors=remount-ro"}, |
| 1293 | {Opt_nouid32, "nouid32"}, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1294 | {Opt_debug, "debug"}, |
Theodore Ts'o | 72578c3 | 2012-03-03 18:04:40 -0500 | [diff] [blame] | 1295 | {Opt_removed, "oldalloc"}, |
| 1296 | {Opt_removed, "orlov"}, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1297 | {Opt_user_xattr, "user_xattr"}, |
| 1298 | {Opt_nouser_xattr, "nouser_xattr"}, |
| 1299 | {Opt_acl, "acl"}, |
| 1300 | {Opt_noacl, "noacl"}, |
Eric Sandeen | e3bb52a | 2009-11-19 14:28:50 -0500 | [diff] [blame] | 1301 | {Opt_noload, "norecovery"}, |
Theodore Ts'o | 5a916be | 2012-03-04 19:27:31 -0500 | [diff] [blame] | 1302 | {Opt_noload, "noload"}, |
Theodore Ts'o | 72578c3 | 2012-03-03 18:04:40 -0500 | [diff] [blame] | 1303 | {Opt_removed, "nobh"}, |
| 1304 | {Opt_removed, "bh"}, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1305 | {Opt_commit, "commit=%u"}, |
Theodore Ts'o | 3077384 | 2009-01-03 20:27:38 -0500 | [diff] [blame] | 1306 | {Opt_min_batch_time, "min_batch_time=%u"}, |
| 1307 | {Opt_max_batch_time, "max_batch_time=%u"}, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1308 | {Opt_journal_dev, "journal_dev=%u"}, |
Eric Sandeen | ad4eec6 | 2013-08-28 19:05:07 -0400 | [diff] [blame] | 1309 | {Opt_journal_path, "journal_path=%s"}, |
Girish Shilamkar | 818d276 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 1310 | {Opt_journal_checksum, "journal_checksum"}, |
Darrick J. Wong | c6d3d56 | 2014-11-25 16:20:50 -0500 | [diff] [blame] | 1311 | {Opt_nojournal_checksum, "nojournal_checksum"}, |
Girish Shilamkar | 818d276 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 1312 | {Opt_journal_async_commit, "journal_async_commit"}, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1313 | {Opt_abort, "abort"}, |
| 1314 | {Opt_data_journal, "data=journal"}, |
| 1315 | {Opt_data_ordered, "data=ordered"}, |
| 1316 | {Opt_data_writeback, "data=writeback"}, |
Hidehiro Kawai | 5bf5683 | 2008-10-10 22:12:43 -0400 | [diff] [blame] | 1317 | {Opt_data_err_abort, "data_err=abort"}, |
| 1318 | {Opt_data_err_ignore, "data_err=ignore"}, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1319 | {Opt_offusrjquota, "usrjquota="}, |
| 1320 | {Opt_usrjquota, "usrjquota=%s"}, |
| 1321 | {Opt_offgrpjquota, "grpjquota="}, |
| 1322 | {Opt_grpjquota, "grpjquota=%s"}, |
| 1323 | {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, |
| 1324 | {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, |
Jan Kara | 5a20bdf | 2009-11-30 23:58:32 +0100 | [diff] [blame] | 1325 | {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1326 | {Opt_grpquota, "grpquota"}, |
| 1327 | {Opt_noquota, "noquota"}, |
| 1328 | {Opt_quota, "quota"}, |
| 1329 | {Opt_usrquota, "usrquota"}, |
| 1330 | {Opt_barrier, "barrier=%u"}, |
Theodore Ts'o | 06705bf | 2009-03-28 10:59:57 -0400 | [diff] [blame] | 1331 | {Opt_barrier, "barrier"}, |
| 1332 | {Opt_nobarrier, "nobarrier"}, |
Jean Noel Cordenner | 25ec56b | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 1333 | {Opt_i_version, "i_version"}, |
Ross Zwisler | 923ae0f | 2015-02-16 15:59:38 -0800 | [diff] [blame] | 1334 | {Opt_dax, "dax"}, |
Alex Tomas | c9de560 | 2008-01-29 00:19:52 -0500 | [diff] [blame] | 1335 | {Opt_stripe, "stripe=%u"}, |
Alex Tomas | 6476924 | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 1336 | {Opt_delalloc, "delalloc"}, |
Theodore Ts'o | a26f499 | 2015-02-02 00:37:02 -0500 | [diff] [blame] | 1337 | {Opt_lazytime, "lazytime"}, |
| 1338 | {Opt_nolazytime, "nolazytime"}, |
Aneesh Kumar K.V | dd919b9 | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 1339 | {Opt_nodelalloc, "nodelalloc"}, |
Jan Kara | 36ade45 | 2013-01-28 09:30:52 -0500 | [diff] [blame] | 1340 | {Opt_removed, "mblk_io_submit"}, |
| 1341 | {Opt_removed, "nomblk_io_submit"}, |
Theodore Ts'o | 6fd058f | 2009-05-17 15:38:01 -0400 | [diff] [blame] | 1342 | {Opt_block_validity, "block_validity"}, |
| 1343 | {Opt_noblock_validity, "noblock_validity"}, |
Theodore Ts'o | 240799c | 2008-10-09 23:53:47 -0400 | [diff] [blame] | 1344 | {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, |
Theodore Ts'o | b3881f7 | 2009-01-05 22:46:26 -0500 | [diff] [blame] | 1345 | {Opt_journal_ioprio, "journal_ioprio=%u"}, |
Theodore Ts'o | afd4672 | 2009-03-16 23:12:23 -0400 | [diff] [blame] | 1346 | {Opt_auto_da_alloc, "auto_da_alloc=%u"}, |
Theodore Ts'o | 06705bf | 2009-03-28 10:59:57 -0400 | [diff] [blame] | 1347 | {Opt_auto_da_alloc, "auto_da_alloc"}, |
| 1348 | {Opt_noauto_da_alloc, "noauto_da_alloc"}, |
Jiaying Zhang | 744692d | 2010-03-04 16:14:02 -0500 | [diff] [blame] | 1349 | {Opt_dioread_nolock, "dioread_nolock"}, |
| 1350 | {Opt_dioread_lock, "dioread_lock"}, |
Eric Sandeen | 5328e63 | 2009-11-19 14:25:42 -0500 | [diff] [blame] | 1351 | {Opt_discard, "discard"}, |
| 1352 | {Opt_nodiscard, "nodiscard"}, |
Theodore Ts'o | fc6cb1c | 2011-12-12 22:06:18 -0500 | [diff] [blame] | 1353 | {Opt_init_itable, "init_itable=%u"}, |
| 1354 | {Opt_init_itable, "init_itable"}, |
| 1355 | {Opt_noinit_itable, "noinit_itable"}, |
Theodore Ts'o | df981d0 | 2012-08-17 09:48:17 -0400 | [diff] [blame] | 1356 | {Opt_max_dir_size_kb, "max_dir_size_kb=%u"}, |
Theodore Ts'o | 6ddb244 | 2015-04-16 01:56:00 -0400 | [diff] [blame] | 1357 | {Opt_test_dummy_encryption, "test_dummy_encryption"}, |
Theodore Ts'o | c7198b9 | 2012-03-04 22:00:53 -0500 | [diff] [blame] | 1358 | {Opt_removed, "check=none"}, /* mount option from ext2/3 */ |
| 1359 | {Opt_removed, "nocheck"}, /* mount option from ext2/3 */ |
| 1360 | {Opt_removed, "reservation"}, /* mount option from ext2/3 */ |
| 1361 | {Opt_removed, "noreservation"}, /* mount option from ext2/3 */ |
| 1362 | {Opt_removed, "journal=%u"}, /* mount option from ext2/3 */ |
Josef Bacik | f3f12fa | 2008-04-29 22:05:28 -0400 | [diff] [blame] | 1363 | {Opt_err, NULL}, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1364 | }; |
| 1365 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1366 | static ext4_fsblk_t get_sb_block(void **data) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1367 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1368 | ext4_fsblk_t sb_block; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1369 | char *options = (char *) *data; |
| 1370 | |
| 1371 | if (!options || strncmp(options, "sb=", 3) != 0) |
| 1372 | return 1; /* Default location */ |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 1373 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1374 | options += 3; |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 1375 | /* TODO: use simple_strtoll with >32bit ext4 */ |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1376 | sb_block = simple_strtoul(options, &options, 0); |
| 1377 | if (*options && *options != ',') { |
Theodore Ts'o | 4776004f | 2008-09-08 23:00:52 -0400 | [diff] [blame] | 1378 | printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1379 | (char *) *data); |
| 1380 | return 1; |
| 1381 | } |
| 1382 | if (*options == ',') |
| 1383 | options++; |
| 1384 | *data = (void *) options; |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 1385 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1386 | return sb_block; |
| 1387 | } |
| 1388 | |
Theodore Ts'o | b3881f7 | 2009-01-05 22:46:26 -0500 | [diff] [blame] | 1389 | #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) |
Dmitry Monakhov | 437ca0f | 2010-03-01 22:29:21 -0500 | [diff] [blame] | 1390 | static char deprecated_msg[] = "Mount option \"%s\" will be removed by %s\n" |
| 1391 | "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] | 1392 | |
Dmitry Monakhov | 56c50f1 | 2010-03-01 23:28:41 -0500 | [diff] [blame] | 1393 | #ifdef CONFIG_QUOTA |
| 1394 | static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) |
| 1395 | { |
| 1396 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
| 1397 | char *qname; |
Chen Gang | 03dafb5 | 2013-01-24 23:24:58 -0500 | [diff] [blame] | 1398 | int ret = -1; |
Dmitry Monakhov | 56c50f1 | 2010-03-01 23:28:41 -0500 | [diff] [blame] | 1399 | |
| 1400 | if (sb_any_quota_loaded(sb) && |
| 1401 | !sbi->s_qf_names[qtype]) { |
| 1402 | ext4_msg(sb, KERN_ERR, |
| 1403 | "Cannot change journaled " |
| 1404 | "quota options when quota turned on"); |
Theodore Ts'o | 57f73c2 | 2012-04-16 18:55:26 -0400 | [diff] [blame] | 1405 | return -1; |
Dmitry Monakhov | 56c50f1 | 2010-03-01 23:28:41 -0500 | [diff] [blame] | 1406 | } |
Darrick J. Wong | e2b911c | 2015-10-17 16:18:43 -0400 | [diff] [blame] | 1407 | if (ext4_has_feature_quota(sb)) { |
Theodore Ts'o | c325a67 | 2016-04-03 17:03:37 -0400 | [diff] [blame] | 1408 | ext4_msg(sb, KERN_INFO, "Journaled quota options " |
| 1409 | "ignored when QUOTA feature is enabled"); |
| 1410 | return 1; |
Jan Kara | 262b466 | 2013-03-02 17:57:08 -0500 | [diff] [blame] | 1411 | } |
Dmitry Monakhov | 56c50f1 | 2010-03-01 23:28:41 -0500 | [diff] [blame] | 1412 | qname = match_strdup(args); |
| 1413 | if (!qname) { |
| 1414 | ext4_msg(sb, KERN_ERR, |
| 1415 | "Not enough memory for storing quotafile name"); |
Theodore Ts'o | 57f73c2 | 2012-04-16 18:55:26 -0400 | [diff] [blame] | 1416 | return -1; |
Dmitry Monakhov | 56c50f1 | 2010-03-01 23:28:41 -0500 | [diff] [blame] | 1417 | } |
Chen Gang | 03dafb5 | 2013-01-24 23:24:58 -0500 | [diff] [blame] | 1418 | if (sbi->s_qf_names[qtype]) { |
| 1419 | if (strcmp(sbi->s_qf_names[qtype], qname) == 0) |
| 1420 | ret = 1; |
| 1421 | else |
| 1422 | ext4_msg(sb, KERN_ERR, |
| 1423 | "%s quota file already specified", |
| 1424 | QTYPE2NAME(qtype)); |
| 1425 | goto errout; |
Dmitry Monakhov | 56c50f1 | 2010-03-01 23:28:41 -0500 | [diff] [blame] | 1426 | } |
Chen Gang | 03dafb5 | 2013-01-24 23:24:58 -0500 | [diff] [blame] | 1427 | if (strchr(qname, '/')) { |
Dmitry Monakhov | 56c50f1 | 2010-03-01 23:28:41 -0500 | [diff] [blame] | 1428 | ext4_msg(sb, KERN_ERR, |
| 1429 | "quotafile must be on filesystem root"); |
Chen Gang | 03dafb5 | 2013-01-24 23:24:58 -0500 | [diff] [blame] | 1430 | goto errout; |
Dmitry Monakhov | 56c50f1 | 2010-03-01 23:28:41 -0500 | [diff] [blame] | 1431 | } |
Chen Gang | 03dafb5 | 2013-01-24 23:24:58 -0500 | [diff] [blame] | 1432 | sbi->s_qf_names[qtype] = qname; |
Theodore Ts'o | fd8c37e | 2010-12-15 20:26:48 -0500 | [diff] [blame] | 1433 | set_opt(sb, QUOTA); |
Dmitry Monakhov | 56c50f1 | 2010-03-01 23:28:41 -0500 | [diff] [blame] | 1434 | return 1; |
Chen Gang | 03dafb5 | 2013-01-24 23:24:58 -0500 | [diff] [blame] | 1435 | errout: |
| 1436 | kfree(qname); |
| 1437 | return ret; |
Dmitry Monakhov | 56c50f1 | 2010-03-01 23:28:41 -0500 | [diff] [blame] | 1438 | } |
| 1439 | |
| 1440 | static int clear_qf_name(struct super_block *sb, int qtype) |
| 1441 | { |
| 1442 | |
| 1443 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
| 1444 | |
| 1445 | if (sb_any_quota_loaded(sb) && |
| 1446 | sbi->s_qf_names[qtype]) { |
| 1447 | ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" |
| 1448 | " when quota turned on"); |
Theodore Ts'o | 57f73c2 | 2012-04-16 18:55:26 -0400 | [diff] [blame] | 1449 | return -1; |
Dmitry Monakhov | 56c50f1 | 2010-03-01 23:28:41 -0500 | [diff] [blame] | 1450 | } |
Chen Gang | 03dafb5 | 2013-01-24 23:24:58 -0500 | [diff] [blame] | 1451 | kfree(sbi->s_qf_names[qtype]); |
Dmitry Monakhov | 56c50f1 | 2010-03-01 23:28:41 -0500 | [diff] [blame] | 1452 | sbi->s_qf_names[qtype] = NULL; |
| 1453 | return 1; |
| 1454 | } |
| 1455 | #endif |
| 1456 | |
Theodore Ts'o | 26092bf | 2012-03-03 23:20:47 -0500 | [diff] [blame] | 1457 | #define MOPT_SET 0x0001 |
| 1458 | #define MOPT_CLEAR 0x0002 |
| 1459 | #define MOPT_NOSUPPORT 0x0004 |
| 1460 | #define MOPT_EXPLICIT 0x0008 |
| 1461 | #define MOPT_CLEAR_ERR 0x0010 |
| 1462 | #define MOPT_GTE0 0x0020 |
| 1463 | #ifdef CONFIG_QUOTA |
| 1464 | #define MOPT_Q 0 |
| 1465 | #define MOPT_QFMT 0x0040 |
| 1466 | #else |
| 1467 | #define MOPT_Q MOPT_NOSUPPORT |
| 1468 | #define MOPT_QFMT MOPT_NOSUPPORT |
| 1469 | #endif |
| 1470 | #define MOPT_DATAJ 0x0080 |
Theodore Ts'o | 8dc0aa8 | 2013-02-02 23:38:39 -0500 | [diff] [blame] | 1471 | #define MOPT_NO_EXT2 0x0100 |
| 1472 | #define MOPT_NO_EXT3 0x0200 |
| 1473 | #define MOPT_EXT4_ONLY (MOPT_NO_EXT2 | MOPT_NO_EXT3) |
Eric Sandeen | ad4eec6 | 2013-08-28 19:05:07 -0400 | [diff] [blame] | 1474 | #define MOPT_STRING 0x0400 |
Theodore Ts'o | 26092bf | 2012-03-03 23:20:47 -0500 | [diff] [blame] | 1475 | |
| 1476 | static const struct mount_opts { |
| 1477 | int token; |
| 1478 | int mount_opt; |
| 1479 | int flags; |
| 1480 | } ext4_mount_opts[] = { |
| 1481 | {Opt_minix_df, EXT4_MOUNT_MINIX_DF, MOPT_SET}, |
| 1482 | {Opt_bsd_df, EXT4_MOUNT_MINIX_DF, MOPT_CLEAR}, |
| 1483 | {Opt_grpid, EXT4_MOUNT_GRPID, MOPT_SET}, |
| 1484 | {Opt_nogrpid, EXT4_MOUNT_GRPID, MOPT_CLEAR}, |
Theodore Ts'o | 26092bf | 2012-03-03 23:20:47 -0500 | [diff] [blame] | 1485 | {Opt_block_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_SET}, |
| 1486 | {Opt_noblock_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_CLEAR}, |
Theodore Ts'o | 8dc0aa8 | 2013-02-02 23:38:39 -0500 | [diff] [blame] | 1487 | {Opt_dioread_nolock, EXT4_MOUNT_DIOREAD_NOLOCK, |
| 1488 | MOPT_EXT4_ONLY | MOPT_SET}, |
| 1489 | {Opt_dioread_lock, EXT4_MOUNT_DIOREAD_NOLOCK, |
| 1490 | MOPT_EXT4_ONLY | MOPT_CLEAR}, |
Theodore Ts'o | 26092bf | 2012-03-03 23:20:47 -0500 | [diff] [blame] | 1491 | {Opt_discard, EXT4_MOUNT_DISCARD, MOPT_SET}, |
| 1492 | {Opt_nodiscard, EXT4_MOUNT_DISCARD, MOPT_CLEAR}, |
Theodore Ts'o | 8dc0aa8 | 2013-02-02 23:38:39 -0500 | [diff] [blame] | 1493 | {Opt_delalloc, EXT4_MOUNT_DELALLOC, |
| 1494 | MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, |
| 1495 | {Opt_nodelalloc, EXT4_MOUNT_DELALLOC, |
Theodore Ts'o | 59d9fa5 | 2013-08-08 23:01:24 -0400 | [diff] [blame] | 1496 | MOPT_EXT4_ONLY | MOPT_CLEAR}, |
Darrick J. Wong | c6d3d56 | 2014-11-25 16:20:50 -0500 | [diff] [blame] | 1497 | {Opt_nojournal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, |
| 1498 | MOPT_EXT4_ONLY | MOPT_CLEAR}, |
Theodore Ts'o | 8dc0aa8 | 2013-02-02 23:38:39 -0500 | [diff] [blame] | 1499 | {Opt_journal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, |
Dmitry Monakhov | 1e381f6 | 2015-10-18 23:50:26 -0400 | [diff] [blame] | 1500 | MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, |
Theodore Ts'o | 26092bf | 2012-03-03 23:20:47 -0500 | [diff] [blame] | 1501 | {Opt_journal_async_commit, (EXT4_MOUNT_JOURNAL_ASYNC_COMMIT | |
Theodore Ts'o | 8dc0aa8 | 2013-02-02 23:38:39 -0500 | [diff] [blame] | 1502 | EXT4_MOUNT_JOURNAL_CHECKSUM), |
Dmitry Monakhov | 1e381f6 | 2015-10-18 23:50:26 -0400 | [diff] [blame] | 1503 | MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, |
Theodore Ts'o | 8dc0aa8 | 2013-02-02 23:38:39 -0500 | [diff] [blame] | 1504 | {Opt_noload, EXT4_MOUNT_NOLOAD, MOPT_NO_EXT2 | MOPT_SET}, |
Theodore Ts'o | 26092bf | 2012-03-03 23:20:47 -0500 | [diff] [blame] | 1505 | {Opt_err_panic, EXT4_MOUNT_ERRORS_PANIC, MOPT_SET | MOPT_CLEAR_ERR}, |
| 1506 | {Opt_err_ro, EXT4_MOUNT_ERRORS_RO, MOPT_SET | MOPT_CLEAR_ERR}, |
| 1507 | {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] | 1508 | {Opt_data_err_abort, EXT4_MOUNT_DATA_ERR_ABORT, |
Ales Novak | 7915a86 | 2016-03-12 21:55:50 -0500 | [diff] [blame] | 1509 | MOPT_NO_EXT2}, |
Theodore Ts'o | 8dc0aa8 | 2013-02-02 23:38:39 -0500 | [diff] [blame] | 1510 | {Opt_data_err_ignore, EXT4_MOUNT_DATA_ERR_ABORT, |
Ales Novak | 7915a86 | 2016-03-12 21:55:50 -0500 | [diff] [blame] | 1511 | MOPT_NO_EXT2}, |
Theodore Ts'o | 26092bf | 2012-03-03 23:20:47 -0500 | [diff] [blame] | 1512 | {Opt_barrier, EXT4_MOUNT_BARRIER, MOPT_SET}, |
| 1513 | {Opt_nobarrier, EXT4_MOUNT_BARRIER, MOPT_CLEAR}, |
| 1514 | {Opt_noauto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_SET}, |
| 1515 | {Opt_auto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_CLEAR}, |
| 1516 | {Opt_noinit_itable, EXT4_MOUNT_INIT_INODE_TABLE, MOPT_CLEAR}, |
| 1517 | {Opt_commit, 0, MOPT_GTE0}, |
| 1518 | {Opt_max_batch_time, 0, MOPT_GTE0}, |
| 1519 | {Opt_min_batch_time, 0, MOPT_GTE0}, |
| 1520 | {Opt_inode_readahead_blks, 0, MOPT_GTE0}, |
| 1521 | {Opt_init_itable, 0, MOPT_GTE0}, |
Ross Zwisler | 923ae0f | 2015-02-16 15:59:38 -0800 | [diff] [blame] | 1522 | {Opt_dax, EXT4_MOUNT_DAX, MOPT_SET}, |
Theodore Ts'o | 26092bf | 2012-03-03 23:20:47 -0500 | [diff] [blame] | 1523 | {Opt_stripe, 0, MOPT_GTE0}, |
Jan Kara | 0efb3b2 | 2013-02-02 22:52:19 -0500 | [diff] [blame] | 1524 | {Opt_resuid, 0, MOPT_GTE0}, |
| 1525 | {Opt_resgid, 0, MOPT_GTE0}, |
Carlos Maiolino | 5ba92bc | 2015-07-21 23:57:59 -0400 | [diff] [blame] | 1526 | {Opt_journal_dev, 0, MOPT_NO_EXT2 | MOPT_GTE0}, |
| 1527 | {Opt_journal_path, 0, MOPT_NO_EXT2 | MOPT_STRING}, |
| 1528 | {Opt_journal_ioprio, 0, MOPT_NO_EXT2 | MOPT_GTE0}, |
Theodore Ts'o | 8dc0aa8 | 2013-02-02 23:38:39 -0500 | [diff] [blame] | 1529 | {Opt_data_journal, EXT4_MOUNT_JOURNAL_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, |
| 1530 | {Opt_data_ordered, EXT4_MOUNT_ORDERED_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, |
| 1531 | {Opt_data_writeback, EXT4_MOUNT_WRITEBACK_DATA, |
| 1532 | MOPT_NO_EXT2 | MOPT_DATAJ}, |
Theodore Ts'o | 26092bf | 2012-03-03 23:20:47 -0500 | [diff] [blame] | 1533 | {Opt_user_xattr, EXT4_MOUNT_XATTR_USER, MOPT_SET}, |
| 1534 | {Opt_nouser_xattr, EXT4_MOUNT_XATTR_USER, MOPT_CLEAR}, |
Theodore Ts'o | 26092bf | 2012-03-03 23:20:47 -0500 | [diff] [blame] | 1535 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
| 1536 | {Opt_acl, EXT4_MOUNT_POSIX_ACL, MOPT_SET}, |
| 1537 | {Opt_noacl, EXT4_MOUNT_POSIX_ACL, MOPT_CLEAR}, |
| 1538 | #else |
| 1539 | {Opt_acl, 0, MOPT_NOSUPPORT}, |
| 1540 | {Opt_noacl, 0, MOPT_NOSUPPORT}, |
| 1541 | #endif |
| 1542 | {Opt_nouid32, EXT4_MOUNT_NO_UID32, MOPT_SET}, |
| 1543 | {Opt_debug, EXT4_MOUNT_DEBUG, MOPT_SET}, |
| 1544 | {Opt_quota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, MOPT_SET | MOPT_Q}, |
| 1545 | {Opt_usrquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, |
| 1546 | MOPT_SET | MOPT_Q}, |
| 1547 | {Opt_grpquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_GRPQUOTA, |
| 1548 | MOPT_SET | MOPT_Q}, |
| 1549 | {Opt_noquota, (EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | |
| 1550 | EXT4_MOUNT_GRPQUOTA), MOPT_CLEAR | MOPT_Q}, |
| 1551 | {Opt_usrjquota, 0, MOPT_Q}, |
| 1552 | {Opt_grpjquota, 0, MOPT_Q}, |
| 1553 | {Opt_offusrjquota, 0, MOPT_Q}, |
| 1554 | {Opt_offgrpjquota, 0, MOPT_Q}, |
| 1555 | {Opt_jqfmt_vfsold, QFMT_VFS_OLD, MOPT_QFMT}, |
| 1556 | {Opt_jqfmt_vfsv0, QFMT_VFS_V0, MOPT_QFMT}, |
| 1557 | {Opt_jqfmt_vfsv1, QFMT_VFS_V1, MOPT_QFMT}, |
Theodore Ts'o | df981d0 | 2012-08-17 09:48:17 -0400 | [diff] [blame] | 1558 | {Opt_max_dir_size_kb, 0, MOPT_GTE0}, |
Theodore Ts'o | 6ddb244 | 2015-04-16 01:56:00 -0400 | [diff] [blame] | 1559 | {Opt_test_dummy_encryption, 0, MOPT_GTE0}, |
Theodore Ts'o | 26092bf | 2012-03-03 23:20:47 -0500 | [diff] [blame] | 1560 | {Opt_err, 0, 0} |
| 1561 | }; |
| 1562 | |
| 1563 | static int handle_mount_opt(struct super_block *sb, char *opt, int token, |
| 1564 | substring_t *args, unsigned long *journal_devnum, |
| 1565 | unsigned int *journal_ioprio, int is_remount) |
| 1566 | { |
| 1567 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
| 1568 | const struct mount_opts *m; |
Eric W. Biederman | 08cefc7 | 2012-02-07 15:41:49 -0800 | [diff] [blame] | 1569 | kuid_t uid; |
| 1570 | kgid_t gid; |
Theodore Ts'o | 26092bf | 2012-03-03 23:20:47 -0500 | [diff] [blame] | 1571 | int arg = 0; |
| 1572 | |
Theodore Ts'o | 57f73c2 | 2012-04-16 18:55:26 -0400 | [diff] [blame] | 1573 | #ifdef CONFIG_QUOTA |
| 1574 | if (token == Opt_usrjquota) |
| 1575 | return set_qf_name(sb, USRQUOTA, &args[0]); |
| 1576 | else if (token == Opt_grpjquota) |
| 1577 | return set_qf_name(sb, GRPQUOTA, &args[0]); |
| 1578 | else if (token == Opt_offusrjquota) |
| 1579 | return clear_qf_name(sb, USRQUOTA); |
| 1580 | else if (token == Opt_offgrpjquota) |
| 1581 | return clear_qf_name(sb, GRPQUOTA); |
| 1582 | #endif |
Theodore Ts'o | 26092bf | 2012-03-03 23:20:47 -0500 | [diff] [blame] | 1583 | switch (token) { |
Theodore Ts'o | f704860 | 2012-03-04 22:06:20 -0500 | [diff] [blame] | 1584 | case Opt_noacl: |
| 1585 | case Opt_nouser_xattr: |
| 1586 | ext4_msg(sb, KERN_WARNING, deprecated_msg, opt, "3.5"); |
| 1587 | break; |
Theodore Ts'o | 26092bf | 2012-03-03 23:20:47 -0500 | [diff] [blame] | 1588 | case Opt_sb: |
| 1589 | return 1; /* handled by get_sb_block() */ |
| 1590 | case Opt_removed: |
Jan Kara | 5f3633e | 2013-02-02 23:09:36 -0500 | [diff] [blame] | 1591 | ext4_msg(sb, KERN_WARNING, "Ignoring removed %s option", opt); |
Theodore Ts'o | 26092bf | 2012-03-03 23:20:47 -0500 | [diff] [blame] | 1592 | return 1; |
Theodore Ts'o | 26092bf | 2012-03-03 23:20:47 -0500 | [diff] [blame] | 1593 | case Opt_abort: |
| 1594 | sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; |
| 1595 | return 1; |
| 1596 | case Opt_i_version: |
| 1597 | sb->s_flags |= MS_I_VERSION; |
| 1598 | return 1; |
Theodore Ts'o | a26f499 | 2015-02-02 00:37:02 -0500 | [diff] [blame] | 1599 | case Opt_lazytime: |
| 1600 | sb->s_flags |= MS_LAZYTIME; |
| 1601 | return 1; |
| 1602 | case Opt_nolazytime: |
| 1603 | sb->s_flags &= ~MS_LAZYTIME; |
| 1604 | return 1; |
Theodore Ts'o | 26092bf | 2012-03-03 23:20:47 -0500 | [diff] [blame] | 1605 | } |
| 1606 | |
Jan Kara | 5f3633e | 2013-02-02 23:09:36 -0500 | [diff] [blame] | 1607 | for (m = ext4_mount_opts; m->token != Opt_err; m++) |
| 1608 | if (token == m->token) |
| 1609 | break; |
Theodore Ts'o | 26092bf | 2012-03-03 23:20:47 -0500 | [diff] [blame] | 1610 | |
Jan Kara | 5f3633e | 2013-02-02 23:09:36 -0500 | [diff] [blame] | 1611 | if (m->token == Opt_err) { |
| 1612 | ext4_msg(sb, KERN_ERR, "Unrecognized mount option \"%s\" " |
| 1613 | "or missing value", opt); |
| 1614 | return -1; |
Theodore Ts'o | 26092bf | 2012-03-03 23:20:47 -0500 | [diff] [blame] | 1615 | } |
Jan Kara | 5f3633e | 2013-02-02 23:09:36 -0500 | [diff] [blame] | 1616 | |
Theodore Ts'o | 8dc0aa8 | 2013-02-02 23:38:39 -0500 | [diff] [blame] | 1617 | if ((m->flags & MOPT_NO_EXT2) && IS_EXT2_SB(sb)) { |
| 1618 | ext4_msg(sb, KERN_ERR, |
| 1619 | "Mount option \"%s\" incompatible with ext2", opt); |
| 1620 | return -1; |
| 1621 | } |
| 1622 | if ((m->flags & MOPT_NO_EXT3) && IS_EXT3_SB(sb)) { |
| 1623 | ext4_msg(sb, KERN_ERR, |
| 1624 | "Mount option \"%s\" incompatible with ext3", opt); |
| 1625 | return -1; |
| 1626 | } |
| 1627 | |
Eric Sandeen | ad4eec6 | 2013-08-28 19:05:07 -0400 | [diff] [blame] | 1628 | if (args->from && !(m->flags & MOPT_STRING) && match_int(args, &arg)) |
Jan Kara | 5f3633e | 2013-02-02 23:09:36 -0500 | [diff] [blame] | 1629 | return -1; |
| 1630 | if (args->from && (m->flags & MOPT_GTE0) && (arg < 0)) |
| 1631 | return -1; |
Dmitry Monakhov | c93cf2d | 2015-10-18 23:35:32 -0400 | [diff] [blame] | 1632 | if (m->flags & MOPT_EXPLICIT) { |
| 1633 | if (m->mount_opt & EXT4_MOUNT_DELALLOC) { |
| 1634 | set_opt2(sb, EXPLICIT_DELALLOC); |
Dmitry Monakhov | 1e381f6 | 2015-10-18 23:50:26 -0400 | [diff] [blame] | 1635 | } else if (m->mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) { |
| 1636 | set_opt2(sb, EXPLICIT_JOURNAL_CHECKSUM); |
Dmitry Monakhov | c93cf2d | 2015-10-18 23:35:32 -0400 | [diff] [blame] | 1637 | } else |
| 1638 | return -1; |
| 1639 | } |
Jan Kara | 5f3633e | 2013-02-02 23:09:36 -0500 | [diff] [blame] | 1640 | if (m->flags & MOPT_CLEAR_ERR) |
| 1641 | clear_opt(sb, ERRORS_MASK); |
| 1642 | if (token == Opt_noquota && sb_any_quota_loaded(sb)) { |
| 1643 | ext4_msg(sb, KERN_ERR, "Cannot change quota " |
| 1644 | "options when quota turned on"); |
| 1645 | return -1; |
| 1646 | } |
| 1647 | |
| 1648 | if (m->flags & MOPT_NOSUPPORT) { |
| 1649 | ext4_msg(sb, KERN_ERR, "%s option not supported", opt); |
| 1650 | } else if (token == Opt_commit) { |
| 1651 | if (arg == 0) |
| 1652 | arg = JBD2_DEFAULT_MAX_COMMIT_AGE; |
| 1653 | sbi->s_commit_interval = HZ * arg; |
| 1654 | } else if (token == Opt_max_batch_time) { |
Jan Kara | 5f3633e | 2013-02-02 23:09:36 -0500 | [diff] [blame] | 1655 | sbi->s_max_batch_time = arg; |
| 1656 | } else if (token == Opt_min_batch_time) { |
| 1657 | sbi->s_min_batch_time = arg; |
| 1658 | } else if (token == Opt_inode_readahead_blks) { |
Jan Kara | e33e60e | 2013-02-02 23:14:31 -0500 | [diff] [blame] | 1659 | if (arg && (arg > (1 << 30) || !is_power_of_2(arg))) { |
| 1660 | ext4_msg(sb, KERN_ERR, |
| 1661 | "EXT4-fs: inode_readahead_blks must be " |
| 1662 | "0 or a power of 2 smaller than 2^31"); |
Jan Kara | 5f3633e | 2013-02-02 23:09:36 -0500 | [diff] [blame] | 1663 | return -1; |
| 1664 | } |
| 1665 | sbi->s_inode_readahead_blks = arg; |
| 1666 | } else if (token == Opt_init_itable) { |
| 1667 | set_opt(sb, INIT_INODE_TABLE); |
| 1668 | if (!args->from) |
| 1669 | arg = EXT4_DEF_LI_WAIT_MULT; |
| 1670 | sbi->s_li_wait_mult = arg; |
| 1671 | } else if (token == Opt_max_dir_size_kb) { |
| 1672 | sbi->s_max_dir_size_kb = arg; |
| 1673 | } else if (token == Opt_stripe) { |
| 1674 | sbi->s_stripe = arg; |
| 1675 | } else if (token == Opt_resuid) { |
| 1676 | uid = make_kuid(current_user_ns(), arg); |
| 1677 | if (!uid_valid(uid)) { |
| 1678 | ext4_msg(sb, KERN_ERR, "Invalid uid value %d", arg); |
| 1679 | return -1; |
| 1680 | } |
| 1681 | sbi->s_resuid = uid; |
| 1682 | } else if (token == Opt_resgid) { |
| 1683 | gid = make_kgid(current_user_ns(), arg); |
| 1684 | if (!gid_valid(gid)) { |
| 1685 | ext4_msg(sb, KERN_ERR, "Invalid gid value %d", arg); |
| 1686 | return -1; |
| 1687 | } |
| 1688 | sbi->s_resgid = gid; |
| 1689 | } else if (token == Opt_journal_dev) { |
| 1690 | if (is_remount) { |
| 1691 | ext4_msg(sb, KERN_ERR, |
| 1692 | "Cannot specify journal on remount"); |
| 1693 | return -1; |
| 1694 | } |
| 1695 | *journal_devnum = arg; |
Eric Sandeen | ad4eec6 | 2013-08-28 19:05:07 -0400 | [diff] [blame] | 1696 | } else if (token == Opt_journal_path) { |
| 1697 | char *journal_path; |
| 1698 | struct inode *journal_inode; |
| 1699 | struct path path; |
| 1700 | int error; |
| 1701 | |
| 1702 | if (is_remount) { |
| 1703 | ext4_msg(sb, KERN_ERR, |
| 1704 | "Cannot specify journal on remount"); |
| 1705 | return -1; |
| 1706 | } |
| 1707 | journal_path = match_strdup(&args[0]); |
| 1708 | if (!journal_path) { |
| 1709 | ext4_msg(sb, KERN_ERR, "error: could not dup " |
| 1710 | "journal device string"); |
| 1711 | return -1; |
| 1712 | } |
| 1713 | |
| 1714 | error = kern_path(journal_path, LOOKUP_FOLLOW, &path); |
| 1715 | if (error) { |
| 1716 | ext4_msg(sb, KERN_ERR, "error: could not find " |
| 1717 | "journal device path: error %d", error); |
| 1718 | kfree(journal_path); |
| 1719 | return -1; |
| 1720 | } |
| 1721 | |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 1722 | journal_inode = d_inode(path.dentry); |
Eric Sandeen | ad4eec6 | 2013-08-28 19:05:07 -0400 | [diff] [blame] | 1723 | if (!S_ISBLK(journal_inode->i_mode)) { |
| 1724 | ext4_msg(sb, KERN_ERR, "error: journal path %s " |
| 1725 | "is not a block device", journal_path); |
| 1726 | path_put(&path); |
| 1727 | kfree(journal_path); |
| 1728 | return -1; |
| 1729 | } |
| 1730 | |
| 1731 | *journal_devnum = new_encode_dev(journal_inode->i_rdev); |
| 1732 | path_put(&path); |
| 1733 | kfree(journal_path); |
Jan Kara | 5f3633e | 2013-02-02 23:09:36 -0500 | [diff] [blame] | 1734 | } else if (token == Opt_journal_ioprio) { |
| 1735 | if (arg > 7) { |
| 1736 | ext4_msg(sb, KERN_ERR, "Invalid journal IO priority" |
| 1737 | " (must be 0-7)"); |
| 1738 | return -1; |
| 1739 | } |
| 1740 | *journal_ioprio = |
| 1741 | IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, arg); |
Theodore Ts'o | 6ddb244 | 2015-04-16 01:56:00 -0400 | [diff] [blame] | 1742 | } else if (token == Opt_test_dummy_encryption) { |
| 1743 | #ifdef CONFIG_EXT4_FS_ENCRYPTION |
| 1744 | sbi->s_mount_flags |= EXT4_MF_TEST_DUMMY_ENCRYPTION; |
| 1745 | ext4_msg(sb, KERN_WARNING, |
| 1746 | "Test dummy encryption mode enabled"); |
| 1747 | #else |
| 1748 | ext4_msg(sb, KERN_WARNING, |
| 1749 | "Test dummy encryption mount option ignored"); |
| 1750 | #endif |
Jan Kara | 5f3633e | 2013-02-02 23:09:36 -0500 | [diff] [blame] | 1751 | } else if (m->flags & MOPT_DATAJ) { |
| 1752 | if (is_remount) { |
| 1753 | if (!sbi->s_journal) |
| 1754 | ext4_msg(sb, KERN_WARNING, "Remounting file system with no journal so ignoring journalled data option"); |
| 1755 | else if (test_opt(sb, DATA_FLAGS) != m->mount_opt) { |
| 1756 | ext4_msg(sb, KERN_ERR, |
| 1757 | "Cannot change data mode on remount"); |
| 1758 | return -1; |
| 1759 | } |
| 1760 | } else { |
| 1761 | clear_opt(sb, DATA_FLAGS); |
| 1762 | sbi->s_mount_opt |= m->mount_opt; |
| 1763 | } |
| 1764 | #ifdef CONFIG_QUOTA |
| 1765 | } else if (m->flags & MOPT_QFMT) { |
| 1766 | if (sb_any_quota_loaded(sb) && |
| 1767 | sbi->s_jquota_fmt != m->mount_opt) { |
| 1768 | ext4_msg(sb, KERN_ERR, "Cannot change journaled " |
| 1769 | "quota options when quota turned on"); |
| 1770 | return -1; |
| 1771 | } |
Darrick J. Wong | e2b911c | 2015-10-17 16:18:43 -0400 | [diff] [blame] | 1772 | if (ext4_has_feature_quota(sb)) { |
Theodore Ts'o | c325a67 | 2016-04-03 17:03:37 -0400 | [diff] [blame] | 1773 | ext4_msg(sb, KERN_INFO, |
| 1774 | "Quota format mount options ignored " |
Jan Kara | 262b466 | 2013-03-02 17:57:08 -0500 | [diff] [blame] | 1775 | "when QUOTA feature is enabled"); |
Theodore Ts'o | c325a67 | 2016-04-03 17:03:37 -0400 | [diff] [blame] | 1776 | return 1; |
Jan Kara | 262b466 | 2013-03-02 17:57:08 -0500 | [diff] [blame] | 1777 | } |
Jan Kara | 5f3633e | 2013-02-02 23:09:36 -0500 | [diff] [blame] | 1778 | sbi->s_jquota_fmt = m->mount_opt; |
| 1779 | #endif |
Ross Zwisler | 923ae0f | 2015-02-16 15:59:38 -0800 | [diff] [blame] | 1780 | } else if (token == Opt_dax) { |
Dan Williams | ef83b6e | 2015-09-29 15:48:11 -0400 | [diff] [blame] | 1781 | #ifdef CONFIG_FS_DAX |
| 1782 | ext4_msg(sb, KERN_WARNING, |
| 1783 | "DAX enabled. Warning: EXPERIMENTAL, use at your own risk"); |
| 1784 | sbi->s_mount_opt |= m->mount_opt; |
| 1785 | #else |
Ross Zwisler | 923ae0f | 2015-02-16 15:59:38 -0800 | [diff] [blame] | 1786 | ext4_msg(sb, KERN_INFO, "dax option not supported"); |
| 1787 | return -1; |
| 1788 | #endif |
Ales Novak | 7915a86 | 2016-03-12 21:55:50 -0500 | [diff] [blame] | 1789 | } else if (token == Opt_data_err_abort) { |
| 1790 | sbi->s_mount_opt |= m->mount_opt; |
| 1791 | } else if (token == Opt_data_err_ignore) { |
| 1792 | sbi->s_mount_opt &= ~m->mount_opt; |
Jan Kara | 5f3633e | 2013-02-02 23:09:36 -0500 | [diff] [blame] | 1793 | } else { |
| 1794 | if (!args->from) |
| 1795 | arg = 1; |
| 1796 | if (m->flags & MOPT_CLEAR) |
| 1797 | arg = !arg; |
| 1798 | else if (unlikely(!(m->flags & MOPT_SET))) { |
| 1799 | ext4_msg(sb, KERN_WARNING, |
| 1800 | "buggy handling of option %s", opt); |
| 1801 | WARN_ON(1); |
| 1802 | return -1; |
| 1803 | } |
| 1804 | if (arg != 0) |
| 1805 | sbi->s_mount_opt |= m->mount_opt; |
| 1806 | else |
| 1807 | sbi->s_mount_opt &= ~m->mount_opt; |
| 1808 | } |
| 1809 | return 1; |
Theodore Ts'o | 26092bf | 2012-03-03 23:20:47 -0500 | [diff] [blame] | 1810 | } |
| 1811 | |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 1812 | static int parse_options(char *options, struct super_block *sb, |
Theodore Ts'o | c319106 | 2009-01-06 11:14:25 -0500 | [diff] [blame] | 1813 | unsigned long *journal_devnum, |
Theodore Ts'o | b3881f7 | 2009-01-05 22:46:26 -0500 | [diff] [blame] | 1814 | unsigned int *journal_ioprio, |
Eric Sandeen | 661aa52 | 2012-02-20 17:53:04 -0500 | [diff] [blame] | 1815 | int is_remount) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1816 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1817 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 1818 | char *p; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1819 | substring_t args[MAX_OPT_ARGS]; |
Theodore Ts'o | 26092bf | 2012-03-03 23:20:47 -0500 | [diff] [blame] | 1820 | int token; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1821 | |
| 1822 | if (!options) |
| 1823 | return 1; |
| 1824 | |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 1825 | while ((p = strsep(&options, ",")) != NULL) { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1826 | if (!*p) |
| 1827 | continue; |
Eric Sandeen | 15121c1 | 2010-02-15 20:17:55 -0500 | [diff] [blame] | 1828 | /* |
| 1829 | * Initialize args struct so we know whether arg was |
| 1830 | * found; some options take optional arguments. |
| 1831 | */ |
Sachin Kamat | caecd0a | 2012-08-18 22:29:18 -0400 | [diff] [blame] | 1832 | args[0].to = args[0].from = NULL; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1833 | token = match_token(p, tokens, args); |
Theodore Ts'o | 26092bf | 2012-03-03 23:20:47 -0500 | [diff] [blame] | 1834 | if (handle_mount_opt(sb, p, token, args, journal_devnum, |
| 1835 | journal_ioprio, is_remount) < 0) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1836 | return 0; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1837 | } |
| 1838 | #ifdef CONFIG_QUOTA |
Darrick J. Wong | e2b911c | 2015-10-17 16:18:43 -0400 | [diff] [blame] | 1839 | if (ext4_has_feature_quota(sb) && |
Jan Kara | 262b466 | 2013-03-02 17:57:08 -0500 | [diff] [blame] | 1840 | (test_opt(sb, USRQUOTA) || test_opt(sb, GRPQUOTA))) { |
Theodore Ts'o | c325a67 | 2016-04-03 17:03:37 -0400 | [diff] [blame] | 1841 | ext4_msg(sb, KERN_INFO, "Quota feature enabled, usrquota and grpquota " |
| 1842 | "mount options ignored."); |
| 1843 | clear_opt(sb, USRQUOTA); |
| 1844 | clear_opt(sb, GRPQUOTA); |
| 1845 | } else if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { |
Dmitry Monakhov | 482a742 | 2010-02-24 11:35:32 -0500 | [diff] [blame] | 1846 | if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) |
Theodore Ts'o | fd8c37e | 2010-12-15 20:26:48 -0500 | [diff] [blame] | 1847 | clear_opt(sb, USRQUOTA); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1848 | |
Dmitry Monakhov | 482a742 | 2010-02-24 11:35:32 -0500 | [diff] [blame] | 1849 | if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) |
Theodore Ts'o | fd8c37e | 2010-12-15 20:26:48 -0500 | [diff] [blame] | 1850 | clear_opt(sb, GRPQUOTA); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1851 | |
Dmitry Monakhov | 56c50f1 | 2010-03-01 23:28:41 -0500 | [diff] [blame] | 1852 | if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 1853 | ext4_msg(sb, KERN_ERR, "old and new quota " |
| 1854 | "format mixing"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1855 | return 0; |
| 1856 | } |
| 1857 | |
| 1858 | if (!sbi->s_jquota_fmt) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 1859 | ext4_msg(sb, KERN_ERR, "journaled quota format " |
| 1860 | "not specified"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1861 | return 0; |
| 1862 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1863 | } |
| 1864 | #endif |
Jan Kara | 261cb20c | 2012-12-20 00:07:18 -0500 | [diff] [blame] | 1865 | if (test_opt(sb, DIOREAD_NOLOCK)) { |
| 1866 | int blocksize = |
| 1867 | BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size); |
| 1868 | |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 1869 | if (blocksize < PAGE_SIZE) { |
Jan Kara | 261cb20c | 2012-12-20 00:07:18 -0500 | [diff] [blame] | 1870 | ext4_msg(sb, KERN_ERR, "can't mount with " |
| 1871 | "dioread_nolock if block size != PAGE_SIZE"); |
| 1872 | return 0; |
| 1873 | } |
| 1874 | } |
Jan Kara | d4f7610 | 2014-11-25 20:19:17 -0500 | [diff] [blame] | 1875 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA && |
| 1876 | test_opt(sb, JOURNAL_ASYNC_COMMIT)) { |
| 1877 | ext4_msg(sb, KERN_ERR, "can't mount with journal_async_commit " |
| 1878 | "in data=ordered mode"); |
| 1879 | return 0; |
| 1880 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1881 | return 1; |
| 1882 | } |
| 1883 | |
Theodore Ts'o | 2adf6da | 2012-03-03 23:20:50 -0500 | [diff] [blame] | 1884 | static inline void ext4_show_quota_options(struct seq_file *seq, |
| 1885 | struct super_block *sb) |
| 1886 | { |
| 1887 | #if defined(CONFIG_QUOTA) |
| 1888 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
| 1889 | |
| 1890 | if (sbi->s_jquota_fmt) { |
| 1891 | char *fmtname = ""; |
| 1892 | |
| 1893 | switch (sbi->s_jquota_fmt) { |
| 1894 | case QFMT_VFS_OLD: |
| 1895 | fmtname = "vfsold"; |
| 1896 | break; |
| 1897 | case QFMT_VFS_V0: |
| 1898 | fmtname = "vfsv0"; |
| 1899 | break; |
| 1900 | case QFMT_VFS_V1: |
| 1901 | fmtname = "vfsv1"; |
| 1902 | break; |
| 1903 | } |
| 1904 | seq_printf(seq, ",jqfmt=%s", fmtname); |
| 1905 | } |
| 1906 | |
| 1907 | if (sbi->s_qf_names[USRQUOTA]) |
Kees Cook | a068acf | 2015-09-04 15:44:57 -0700 | [diff] [blame] | 1908 | seq_show_option(seq, "usrjquota", sbi->s_qf_names[USRQUOTA]); |
Theodore Ts'o | 2adf6da | 2012-03-03 23:20:50 -0500 | [diff] [blame] | 1909 | |
| 1910 | if (sbi->s_qf_names[GRPQUOTA]) |
Kees Cook | a068acf | 2015-09-04 15:44:57 -0700 | [diff] [blame] | 1911 | seq_show_option(seq, "grpjquota", sbi->s_qf_names[GRPQUOTA]); |
Theodore Ts'o | 2adf6da | 2012-03-03 23:20:50 -0500 | [diff] [blame] | 1912 | #endif |
| 1913 | } |
| 1914 | |
Theodore Ts'o | 5a916be | 2012-03-04 19:27:31 -0500 | [diff] [blame] | 1915 | static const char *token2str(int token) |
| 1916 | { |
Herton Ronaldo Krzesinski | 50df9fd | 2012-09-23 22:49:12 -0400 | [diff] [blame] | 1917 | const struct match_token *t; |
Theodore Ts'o | 5a916be | 2012-03-04 19:27:31 -0500 | [diff] [blame] | 1918 | |
| 1919 | for (t = tokens; t->token != Opt_err; t++) |
| 1920 | if (t->token == token && !strchr(t->pattern, '=')) |
| 1921 | break; |
| 1922 | return t->pattern; |
| 1923 | } |
| 1924 | |
Theodore Ts'o | 2adf6da | 2012-03-03 23:20:50 -0500 | [diff] [blame] | 1925 | /* |
| 1926 | * Show an option if |
| 1927 | * - it's set to a non-default value OR |
| 1928 | * - if the per-sb default is different from the global default |
| 1929 | */ |
Theodore Ts'o | 66acdcf | 2012-03-04 20:21:38 -0500 | [diff] [blame] | 1930 | static int _ext4_show_options(struct seq_file *seq, struct super_block *sb, |
| 1931 | int nodefs) |
Theodore Ts'o | 2adf6da | 2012-03-03 23:20:50 -0500 | [diff] [blame] | 1932 | { |
Theodore Ts'o | 2adf6da | 2012-03-03 23:20:50 -0500 | [diff] [blame] | 1933 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
| 1934 | struct ext4_super_block *es = sbi->s_es; |
Theodore Ts'o | 66acdcf | 2012-03-04 20:21:38 -0500 | [diff] [blame] | 1935 | 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] | 1936 | const struct mount_opts *m; |
Theodore Ts'o | 66acdcf | 2012-03-04 20:21:38 -0500 | [diff] [blame] | 1937 | char sep = nodefs ? '\n' : ','; |
Theodore Ts'o | 2adf6da | 2012-03-03 23:20:50 -0500 | [diff] [blame] | 1938 | |
Theodore Ts'o | 66acdcf | 2012-03-04 20:21:38 -0500 | [diff] [blame] | 1939 | #define SEQ_OPTS_PUTS(str) seq_printf(seq, "%c" str, sep) |
| 1940 | #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] | 1941 | |
| 1942 | if (sbi->s_sb_block != 1) |
Theodore Ts'o | 5a916be | 2012-03-04 19:27:31 -0500 | [diff] [blame] | 1943 | SEQ_OPTS_PRINT("sb=%llu", sbi->s_sb_block); |
| 1944 | |
| 1945 | for (m = ext4_mount_opts; m->token != Opt_err; m++) { |
| 1946 | int want_set = m->flags & MOPT_SET; |
| 1947 | if (((m->flags & (MOPT_SET|MOPT_CLEAR)) == 0) || |
| 1948 | (m->flags & MOPT_CLEAR_ERR)) |
| 1949 | continue; |
Theodore Ts'o | 66acdcf | 2012-03-04 20:21:38 -0500 | [diff] [blame] | 1950 | if (!(m->mount_opt & (sbi->s_mount_opt ^ def_mount_opt))) |
Theodore Ts'o | 5a916be | 2012-03-04 19:27:31 -0500 | [diff] [blame] | 1951 | continue; /* skip if same as the default */ |
| 1952 | if ((want_set && |
| 1953 | (sbi->s_mount_opt & m->mount_opt) != m->mount_opt) || |
| 1954 | (!want_set && (sbi->s_mount_opt & m->mount_opt))) |
| 1955 | continue; /* select Opt_noFoo vs Opt_Foo */ |
| 1956 | SEQ_OPTS_PRINT("%s", token2str(m->token)); |
| 1957 | } |
| 1958 | |
Eric W. Biederman | 08cefc7 | 2012-02-07 15:41:49 -0800 | [diff] [blame] | 1959 | 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] | 1960 | le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) |
Eric W. Biederman | 08cefc7 | 2012-02-07 15:41:49 -0800 | [diff] [blame] | 1961 | SEQ_OPTS_PRINT("resuid=%u", |
| 1962 | from_kuid_munged(&init_user_ns, sbi->s_resuid)); |
| 1963 | 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] | 1964 | le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) |
Eric W. Biederman | 08cefc7 | 2012-02-07 15:41:49 -0800 | [diff] [blame] | 1965 | SEQ_OPTS_PRINT("resgid=%u", |
| 1966 | from_kgid_munged(&init_user_ns, sbi->s_resgid)); |
Theodore Ts'o | 66acdcf | 2012-03-04 20:21:38 -0500 | [diff] [blame] | 1967 | def_errors = nodefs ? -1 : le16_to_cpu(es->s_errors); |
Theodore Ts'o | 5a916be | 2012-03-04 19:27:31 -0500 | [diff] [blame] | 1968 | if (test_opt(sb, ERRORS_RO) && def_errors != EXT4_ERRORS_RO) |
| 1969 | SEQ_OPTS_PUTS("errors=remount-ro"); |
Theodore Ts'o | 2adf6da | 2012-03-03 23:20:50 -0500 | [diff] [blame] | 1970 | if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) |
Theodore Ts'o | 5a916be | 2012-03-04 19:27:31 -0500 | [diff] [blame] | 1971 | SEQ_OPTS_PUTS("errors=continue"); |
Theodore Ts'o | 2adf6da | 2012-03-03 23:20:50 -0500 | [diff] [blame] | 1972 | if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) |
Theodore Ts'o | 5a916be | 2012-03-04 19:27:31 -0500 | [diff] [blame] | 1973 | SEQ_OPTS_PUTS("errors=panic"); |
Theodore Ts'o | 66acdcf | 2012-03-04 20:21:38 -0500 | [diff] [blame] | 1974 | 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] | 1975 | SEQ_OPTS_PRINT("commit=%lu", sbi->s_commit_interval / HZ); |
Theodore Ts'o | 66acdcf | 2012-03-04 20:21:38 -0500 | [diff] [blame] | 1976 | 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] | 1977 | 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] | 1978 | 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] | 1979 | 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] | 1980 | if (sb->s_flags & MS_I_VERSION) |
Theodore Ts'o | 5a916be | 2012-03-04 19:27:31 -0500 | [diff] [blame] | 1981 | SEQ_OPTS_PUTS("i_version"); |
Theodore Ts'o | 66acdcf | 2012-03-04 20:21:38 -0500 | [diff] [blame] | 1982 | if (nodefs || sbi->s_stripe) |
Theodore Ts'o | 5a916be | 2012-03-04 19:27:31 -0500 | [diff] [blame] | 1983 | SEQ_OPTS_PRINT("stripe=%lu", sbi->s_stripe); |
Theodore Ts'o | 66acdcf | 2012-03-04 20:21:38 -0500 | [diff] [blame] | 1984 | 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] | 1985 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) |
| 1986 | SEQ_OPTS_PUTS("data=journal"); |
| 1987 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) |
| 1988 | SEQ_OPTS_PUTS("data=ordered"); |
| 1989 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) |
| 1990 | SEQ_OPTS_PUTS("data=writeback"); |
| 1991 | } |
Theodore Ts'o | 66acdcf | 2012-03-04 20:21:38 -0500 | [diff] [blame] | 1992 | if (nodefs || |
| 1993 | sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) |
Theodore Ts'o | 5a916be | 2012-03-04 19:27:31 -0500 | [diff] [blame] | 1994 | SEQ_OPTS_PRINT("inode_readahead_blks=%u", |
| 1995 | sbi->s_inode_readahead_blks); |
Theodore Ts'o | 2adf6da | 2012-03-03 23:20:50 -0500 | [diff] [blame] | 1996 | |
Theodore Ts'o | 66acdcf | 2012-03-04 20:21:38 -0500 | [diff] [blame] | 1997 | if (nodefs || (test_opt(sb, INIT_INODE_TABLE) && |
| 1998 | (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT))) |
Theodore Ts'o | 5a916be | 2012-03-04 19:27:31 -0500 | [diff] [blame] | 1999 | SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult); |
Theodore Ts'o | df981d0 | 2012-08-17 09:48:17 -0400 | [diff] [blame] | 2000 | if (nodefs || sbi->s_max_dir_size_kb) |
| 2001 | SEQ_OPTS_PRINT("max_dir_size_kb=%u", sbi->s_max_dir_size_kb); |
Ales Novak | 7915a86 | 2016-03-12 21:55:50 -0500 | [diff] [blame] | 2002 | if (test_opt(sb, DATA_ERR_ABORT)) |
| 2003 | SEQ_OPTS_PUTS("data_err=abort"); |
Theodore Ts'o | 2adf6da | 2012-03-03 23:20:50 -0500 | [diff] [blame] | 2004 | |
| 2005 | ext4_show_quota_options(seq, sb); |
Theodore Ts'o | 2adf6da | 2012-03-03 23:20:50 -0500 | [diff] [blame] | 2006 | return 0; |
| 2007 | } |
| 2008 | |
Theodore Ts'o | 66acdcf | 2012-03-04 20:21:38 -0500 | [diff] [blame] | 2009 | static int ext4_show_options(struct seq_file *seq, struct dentry *root) |
| 2010 | { |
| 2011 | return _ext4_show_options(seq, root->d_sb, 0); |
| 2012 | } |
| 2013 | |
Theodore Ts'o | ebd173b | 2015-09-23 12:46:17 -0400 | [diff] [blame] | 2014 | int ext4_seq_options_show(struct seq_file *seq, void *offset) |
Theodore Ts'o | 66acdcf | 2012-03-04 20:21:38 -0500 | [diff] [blame] | 2015 | { |
| 2016 | struct super_block *sb = seq->private; |
| 2017 | int rc; |
| 2018 | |
| 2019 | seq_puts(seq, (sb->s_flags & MS_RDONLY) ? "ro" : "rw"); |
| 2020 | rc = _ext4_show_options(seq, sb, 1); |
| 2021 | seq_puts(seq, "\n"); |
| 2022 | return rc; |
| 2023 | } |
| 2024 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2025 | 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] | 2026 | int read_only) |
| 2027 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2028 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2029 | int res = 0; |
| 2030 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2031 | if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 2032 | ext4_msg(sb, KERN_ERR, "revision level too high, " |
| 2033 | "forcing read-only mode"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2034 | res = MS_RDONLY; |
| 2035 | } |
| 2036 | if (read_only) |
Theodore Ts'o | 281b599 | 2011-09-09 18:34:51 -0400 | [diff] [blame] | 2037 | goto done; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2038 | if (!(sbi->s_mount_state & EXT4_VALID_FS)) |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 2039 | ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " |
| 2040 | "running e2fsck is recommended"); |
Lukas Czerner | c8b459f | 2014-05-12 12:55:07 -0400 | [diff] [blame] | 2041 | else if (sbi->s_mount_state & EXT4_ERROR_FS) |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 2042 | ext4_msg(sb, KERN_WARNING, |
| 2043 | "warning: mounting fs with errors, " |
| 2044 | "running e2fsck is recommended"); |
Tao Ma | ed3ce80 | 2011-05-18 13:29:57 -0400 | [diff] [blame] | 2045 | else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2046 | le16_to_cpu(es->s_mnt_count) >= |
| 2047 | (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 2048 | ext4_msg(sb, KERN_WARNING, |
| 2049 | "warning: maximal mount count reached, " |
| 2050 | "running e2fsck is recommended"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2051 | else if (le32_to_cpu(es->s_checkinterval) && |
| 2052 | (le32_to_cpu(es->s_lastcheck) + |
| 2053 | le32_to_cpu(es->s_checkinterval) <= get_seconds())) |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 2054 | ext4_msg(sb, KERN_WARNING, |
| 2055 | "warning: checktime reached, " |
| 2056 | "running e2fsck is recommended"); |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 2057 | if (!sbi->s_journal) |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 2058 | es->s_state &= cpu_to_le16(~EXT4_VALID_FS); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2059 | if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2060 | 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] | 2061 | le16_add_cpu(&es->s_mnt_count, 1); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2062 | es->s_mtime = cpu_to_le32(get_seconds()); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2063 | ext4_update_dynamic_rev(sb); |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 2064 | if (sbi->s_journal) |
Darrick J. Wong | e2b911c | 2015-10-17 16:18:43 -0400 | [diff] [blame] | 2065 | ext4_set_feature_journal_needs_recovery(sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2066 | |
Theodore Ts'o | e2d6705 | 2009-05-01 00:33:44 -0400 | [diff] [blame] | 2067 | ext4_commit_super(sb, 1); |
Theodore Ts'o | 281b599 | 2011-09-09 18:34:51 -0400 | [diff] [blame] | 2068 | done: |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2069 | if (test_opt(sb, DEBUG)) |
Theodore Ts'o | a9df9a4 | 2009-01-05 22:18:16 -0500 | [diff] [blame] | 2070 | printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " |
Theodore Ts'o | a2595b8 | 2010-12-15 20:30:48 -0500 | [diff] [blame] | 2071 | "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2072 | sb->s_blocksize, |
| 2073 | sbi->s_groups_count, |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2074 | EXT4_BLOCKS_PER_GROUP(sb), |
| 2075 | EXT4_INODES_PER_GROUP(sb), |
Theodore Ts'o | a2595b8 | 2010-12-15 20:30:48 -0500 | [diff] [blame] | 2076 | sbi->s_mount_opt, sbi->s_mount_opt2); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2077 | |
Dan Magenheimer | 7abc52c | 2011-05-26 10:02:03 -0600 | [diff] [blame] | 2078 | cleancache_init_fs(sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2079 | return res; |
| 2080 | } |
| 2081 | |
Theodore Ts'o | 117fff1 | 2012-09-05 01:29:50 -0400 | [diff] [blame] | 2082 | int ext4_alloc_flex_bg_array(struct super_block *sb, ext4_group_t ngroup) |
| 2083 | { |
| 2084 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
| 2085 | struct flex_groups *new_groups; |
| 2086 | int size; |
| 2087 | |
| 2088 | if (!sbi->s_log_groups_per_flex) |
| 2089 | return 0; |
| 2090 | |
| 2091 | size = ext4_flex_group(sbi, ngroup - 1) + 1; |
| 2092 | if (size <= sbi->s_flex_groups_allocated) |
| 2093 | return 0; |
| 2094 | |
| 2095 | size = roundup_pow_of_two(size * sizeof(struct flex_groups)); |
| 2096 | new_groups = ext4_kvzalloc(size, GFP_KERNEL); |
| 2097 | if (!new_groups) { |
| 2098 | ext4_msg(sb, KERN_ERR, "not enough memory for %d flex groups", |
| 2099 | size / (int) sizeof(struct flex_groups)); |
| 2100 | return -ENOMEM; |
| 2101 | } |
| 2102 | |
| 2103 | if (sbi->s_flex_groups) { |
| 2104 | memcpy(new_groups, sbi->s_flex_groups, |
| 2105 | (sbi->s_flex_groups_allocated * |
| 2106 | sizeof(struct flex_groups))); |
Al Viro | b93b41d | 2014-11-20 12:19:11 -0500 | [diff] [blame] | 2107 | kvfree(sbi->s_flex_groups); |
Theodore Ts'o | 117fff1 | 2012-09-05 01:29:50 -0400 | [diff] [blame] | 2108 | } |
| 2109 | sbi->s_flex_groups = new_groups; |
| 2110 | sbi->s_flex_groups_allocated = size / sizeof(struct flex_groups); |
| 2111 | return 0; |
| 2112 | } |
| 2113 | |
Jose R. Santos | 772cb7c | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 2114 | static int ext4_fill_flex_info(struct super_block *sb) |
| 2115 | { |
| 2116 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
| 2117 | struct ext4_group_desc *gdp = NULL; |
Jose R. Santos | 772cb7c | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 2118 | ext4_group_t flex_group; |
Theodore Ts'o | 117fff1 | 2012-09-05 01:29:50 -0400 | [diff] [blame] | 2119 | int i, err; |
Jose R. Santos | 772cb7c | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 2120 | |
Theodore Ts'o | 503358a | 2009-11-23 07:24:46 -0500 | [diff] [blame] | 2121 | 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] | 2122 | 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] | 2123 | sbi->s_log_groups_per_flex = 0; |
| 2124 | return 1; |
| 2125 | } |
| 2126 | |
Theodore Ts'o | 117fff1 | 2012-09-05 01:29:50 -0400 | [diff] [blame] | 2127 | err = ext4_alloc_flex_bg_array(sb, sbi->s_groups_count); |
| 2128 | if (err) |
Theodore Ts'o | 9933fc0 | 2011-08-01 08:45:02 -0400 | [diff] [blame] | 2129 | goto failed; |
Jose R. Santos | 772cb7c | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 2130 | |
Jose R. Santos | 772cb7c | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 2131 | for (i = 0; i < sbi->s_groups_count; i++) { |
Theodore Ts'o | 88b6edd | 2009-05-25 11:50:39 -0400 | [diff] [blame] | 2132 | gdp = ext4_get_group_desc(sb, i, NULL); |
Jose R. Santos | 772cb7c | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 2133 | |
| 2134 | flex_group = ext4_flex_group(sbi, i); |
Theodore Ts'o | 7ad9bb6 | 2009-09-11 16:51:28 -0400 | [diff] [blame] | 2135 | atomic_add(ext4_free_inodes_count(sb, gdp), |
| 2136 | &sbi->s_flex_groups[flex_group].free_inodes); |
Theodore Ts'o | 90ba983 | 2013-03-11 23:39:59 -0400 | [diff] [blame] | 2137 | atomic64_add(ext4_free_group_clusters(sb, gdp), |
| 2138 | &sbi->s_flex_groups[flex_group].free_clusters); |
Theodore Ts'o | 7ad9bb6 | 2009-09-11 16:51:28 -0400 | [diff] [blame] | 2139 | atomic_add(ext4_used_dirs_count(sb, gdp), |
| 2140 | &sbi->s_flex_groups[flex_group].used_dirs); |
Jose R. Santos | 772cb7c | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 2141 | } |
| 2142 | |
| 2143 | return 1; |
| 2144 | failed: |
| 2145 | return 0; |
| 2146 | } |
| 2147 | |
Darrick J. Wong | e2b911c | 2015-10-17 16:18:43 -0400 | [diff] [blame] | 2148 | static __le16 ext4_group_desc_csum(struct super_block *sb, __u32 block_group, |
Darrick J. Wong | feb0ab3 | 2012-04-29 18:45:10 -0400 | [diff] [blame] | 2149 | struct ext4_group_desc *gdp) |
Andreas Dilger | 717d50e | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 2150 | { |
Daeho Jeong | b47820e | 2016-07-03 17:51:39 -0400 | [diff] [blame] | 2151 | int offset = offsetof(struct ext4_group_desc, bg_checksum); |
Andreas Dilger | 717d50e | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 2152 | __u16 crc = 0; |
Darrick J. Wong | feb0ab3 | 2012-04-29 18:45:10 -0400 | [diff] [blame] | 2153 | __le32 le_group = cpu_to_le32(block_group); |
Darrick J. Wong | e2b911c | 2015-10-17 16:18:43 -0400 | [diff] [blame] | 2154 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
Andreas Dilger | 717d50e | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 2155 | |
Dmitry Monakhov | 9aa5d32 | 2014-10-13 03:36:16 -0400 | [diff] [blame] | 2156 | if (ext4_has_metadata_csum(sbi->s_sb)) { |
Darrick J. Wong | feb0ab3 | 2012-04-29 18:45:10 -0400 | [diff] [blame] | 2157 | /* Use new metadata_csum algorithm */ |
Darrick J. Wong | feb0ab3 | 2012-04-29 18:45:10 -0400 | [diff] [blame] | 2158 | __u32 csum32; |
Daeho Jeong | b47820e | 2016-07-03 17:51:39 -0400 | [diff] [blame] | 2159 | __u16 dummy_csum = 0; |
Andreas Dilger | 717d50e | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 2160 | |
Darrick J. Wong | feb0ab3 | 2012-04-29 18:45:10 -0400 | [diff] [blame] | 2161 | csum32 = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&le_group, |
| 2162 | sizeof(le_group)); |
Daeho Jeong | b47820e | 2016-07-03 17:51:39 -0400 | [diff] [blame] | 2163 | csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp, offset); |
| 2164 | csum32 = ext4_chksum(sbi, csum32, (__u8 *)&dummy_csum, |
| 2165 | sizeof(dummy_csum)); |
| 2166 | offset += sizeof(dummy_csum); |
| 2167 | if (offset < sbi->s_desc_size) |
| 2168 | csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp + offset, |
| 2169 | sbi->s_desc_size - offset); |
Darrick J. Wong | feb0ab3 | 2012-04-29 18:45:10 -0400 | [diff] [blame] | 2170 | |
| 2171 | crc = csum32 & 0xFFFF; |
| 2172 | goto out; |
Andreas Dilger | 717d50e | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 2173 | } |
| 2174 | |
Darrick J. Wong | feb0ab3 | 2012-04-29 18:45:10 -0400 | [diff] [blame] | 2175 | /* old crc16 code */ |
Darrick J. Wong | e2b911c | 2015-10-17 16:18:43 -0400 | [diff] [blame] | 2176 | if (!ext4_has_feature_gdt_csum(sb)) |
Darrick J. Wong | 813d32f | 2014-10-14 02:35:49 -0400 | [diff] [blame] | 2177 | return 0; |
| 2178 | |
Darrick J. Wong | feb0ab3 | 2012-04-29 18:45:10 -0400 | [diff] [blame] | 2179 | crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); |
| 2180 | crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); |
| 2181 | crc = crc16(crc, (__u8 *)gdp, offset); |
| 2182 | offset += sizeof(gdp->bg_checksum); /* skip checksum */ |
| 2183 | /* for checksum of struct ext4_group_desc do the rest...*/ |
Darrick J. Wong | e2b911c | 2015-10-17 16:18:43 -0400 | [diff] [blame] | 2184 | if (ext4_has_feature_64bit(sb) && |
Darrick J. Wong | feb0ab3 | 2012-04-29 18:45:10 -0400 | [diff] [blame] | 2185 | offset < le16_to_cpu(sbi->s_es->s_desc_size)) |
| 2186 | crc = crc16(crc, (__u8 *)gdp + offset, |
| 2187 | le16_to_cpu(sbi->s_es->s_desc_size) - |
| 2188 | offset); |
| 2189 | |
| 2190 | out: |
Andreas Dilger | 717d50e | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 2191 | return cpu_to_le16(crc); |
| 2192 | } |
| 2193 | |
Darrick J. Wong | feb0ab3 | 2012-04-29 18:45:10 -0400 | [diff] [blame] | 2194 | 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] | 2195 | struct ext4_group_desc *gdp) |
| 2196 | { |
Darrick J. Wong | feb0ab3 | 2012-04-29 18:45:10 -0400 | [diff] [blame] | 2197 | if (ext4_has_group_desc_csum(sb) && |
Darrick J. Wong | e2b911c | 2015-10-17 16:18:43 -0400 | [diff] [blame] | 2198 | (gdp->bg_checksum != ext4_group_desc_csum(sb, block_group, gdp))) |
Andreas Dilger | 717d50e | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 2199 | return 0; |
| 2200 | |
| 2201 | return 1; |
| 2202 | } |
| 2203 | |
Darrick J. Wong | feb0ab3 | 2012-04-29 18:45:10 -0400 | [diff] [blame] | 2204 | void ext4_group_desc_csum_set(struct super_block *sb, __u32 block_group, |
| 2205 | struct ext4_group_desc *gdp) |
| 2206 | { |
| 2207 | if (!ext4_has_group_desc_csum(sb)) |
| 2208 | return; |
Darrick J. Wong | e2b911c | 2015-10-17 16:18:43 -0400 | [diff] [blame] | 2209 | gdp->bg_checksum = ext4_group_desc_csum(sb, block_group, gdp); |
Darrick J. Wong | feb0ab3 | 2012-04-29 18:45:10 -0400 | [diff] [blame] | 2210 | } |
| 2211 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2212 | /* Called at mount-time, super-block is locked */ |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2213 | static int ext4_check_descriptors(struct super_block *sb, |
| 2214 | ext4_group_t *first_not_zeroed) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2215 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2216 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
| 2217 | ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); |
| 2218 | ext4_fsblk_t last_block; |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 2219 | ext4_fsblk_t block_bitmap; |
| 2220 | ext4_fsblk_t inode_bitmap; |
| 2221 | ext4_fsblk_t inode_table; |
Jose R. Santos | ce42158 | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 2222 | int flexbg_flag = 0; |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2223 | ext4_group_t i, grp = sbi->s_groups_count; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2224 | |
Darrick J. Wong | e2b911c | 2015-10-17 16:18:43 -0400 | [diff] [blame] | 2225 | if (ext4_has_feature_flex_bg(sb)) |
Jose R. Santos | ce42158 | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 2226 | flexbg_flag = 1; |
| 2227 | |
Theodore Ts'o | af5bc92 | 2008-09-08 22:25:24 -0400 | [diff] [blame] | 2228 | ext4_debug("Checking group descriptors"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2229 | |
Akinobu Mita | 197cd65a | 2008-02-06 01:40:16 -0800 | [diff] [blame] | 2230 | for (i = 0; i < sbi->s_groups_count; i++) { |
| 2231 | struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); |
| 2232 | |
Jose R. Santos | ce42158 | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 2233 | if (i == sbi->s_groups_count - 1 || flexbg_flag) |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 2234 | last_block = ext4_blocks_count(sbi->s_es) - 1; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2235 | else |
| 2236 | last_block = first_block + |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2237 | (EXT4_BLOCKS_PER_GROUP(sb) - 1); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2238 | |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2239 | if ((grp == sbi->s_groups_count) && |
| 2240 | !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) |
| 2241 | grp = i; |
| 2242 | |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 2243 | block_bitmap = ext4_block_bitmap(sb, gdp); |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 2244 | if (block_bitmap < first_block || block_bitmap > last_block) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 2245 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
Theodore Ts'o | a9df9a4 | 2009-01-05 22:18:16 -0500 | [diff] [blame] | 2246 | "Block bitmap for group %u not in group " |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 2247 | "(block %llu)!", i, block_bitmap); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2248 | return 0; |
| 2249 | } |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 2250 | inode_bitmap = ext4_inode_bitmap(sb, gdp); |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 2251 | if (inode_bitmap < first_block || inode_bitmap > last_block) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 2252 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
Theodore Ts'o | a9df9a4 | 2009-01-05 22:18:16 -0500 | [diff] [blame] | 2253 | "Inode bitmap for group %u not in group " |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 2254 | "(block %llu)!", i, inode_bitmap); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2255 | return 0; |
| 2256 | } |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 2257 | inode_table = ext4_inode_table(sb, gdp); |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 2258 | if (inode_table < first_block || |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 2259 | inode_table + sbi->s_itb_per_group - 1 > last_block) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 2260 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
Theodore Ts'o | a9df9a4 | 2009-01-05 22:18:16 -0500 | [diff] [blame] | 2261 | "Inode table for group %u not in group " |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 2262 | "(block %llu)!", i, inode_table); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2263 | return 0; |
| 2264 | } |
Aneesh Kumar K.V | 955ce5f | 2009-05-02 20:35:09 -0400 | [diff] [blame] | 2265 | ext4_lock_group(sb, i); |
Darrick J. Wong | feb0ab3 | 2012-04-29 18:45:10 -0400 | [diff] [blame] | 2266 | if (!ext4_group_desc_csum_verify(sb, i, gdp)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 2267 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
| 2268 | "Checksum for group %u failed (%u!=%u)", |
Darrick J. Wong | e2b911c | 2015-10-17 16:18:43 -0400 | [diff] [blame] | 2269 | i, le16_to_cpu(ext4_group_desc_csum(sb, i, |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 2270 | gdp)), le16_to_cpu(gdp->bg_checksum)); |
Li Zefan | 7ee1ec4 | 2008-09-08 10:47:19 -0400 | [diff] [blame] | 2271 | if (!(sb->s_flags & MS_RDONLY)) { |
Aneesh Kumar K.V | 955ce5f | 2009-05-02 20:35:09 -0400 | [diff] [blame] | 2272 | ext4_unlock_group(sb, i); |
Theodore Ts'o | 8a26646 | 2008-07-26 14:34:21 -0400 | [diff] [blame] | 2273 | return 0; |
Li Zefan | 7ee1ec4 | 2008-09-08 10:47:19 -0400 | [diff] [blame] | 2274 | } |
Andreas Dilger | 717d50e | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 2275 | } |
Aneesh Kumar K.V | 955ce5f | 2009-05-02 20:35:09 -0400 | [diff] [blame] | 2276 | ext4_unlock_group(sb, i); |
Jose R. Santos | ce42158 | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 2277 | if (!flexbg_flag) |
| 2278 | first_block += EXT4_BLOCKS_PER_GROUP(sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2279 | } |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2280 | if (NULL != first_not_zeroed) |
| 2281 | *first_not_zeroed = grp; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2282 | return 1; |
| 2283 | } |
| 2284 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2285 | /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2286 | * the superblock) which were deleted from all directories, but held open by |
| 2287 | * a process at the time of a crash. We walk the list and try to delete these |
| 2288 | * inodes at recovery time (only with a read-write filesystem). |
| 2289 | * |
| 2290 | * In order to keep the orphan inode chain consistent during traversal (in |
| 2291 | * case of crash during recovery), we link each inode into the superblock |
| 2292 | * orphan list_head and handle it the same way as an inode deletion during |
| 2293 | * normal operation (which journals the operations for us). |
| 2294 | * |
| 2295 | * We only do an iget() and an iput() on each inode, which is very safe if we |
| 2296 | * accidentally point at an in-use or already deleted inode. The worst that |
| 2297 | * 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] | 2298 | * 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] | 2299 | * e2fsck was run on this filesystem, and it must have already done the orphan |
| 2300 | * inode cleanup for us, so we can safely abort without any further action. |
| 2301 | */ |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 2302 | static void ext4_orphan_cleanup(struct super_block *sb, |
| 2303 | struct ext4_super_block *es) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2304 | { |
| 2305 | unsigned int s_flags = sb->s_flags; |
| 2306 | int nr_orphans = 0, nr_truncates = 0; |
| 2307 | #ifdef CONFIG_QUOTA |
| 2308 | int i; |
| 2309 | #endif |
| 2310 | if (!es->s_last_orphan) { |
| 2311 | jbd_debug(4, "no orphan inodes to clean up\n"); |
| 2312 | return; |
| 2313 | } |
| 2314 | |
Eric Sandeen | a8f48a9 | 2006-12-06 20:40:13 -0800 | [diff] [blame] | 2315 | if (bdev_read_only(sb->s_bdev)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 2316 | ext4_msg(sb, KERN_ERR, "write access " |
| 2317 | "unavailable, skipping orphan cleanup"); |
Eric Sandeen | a8f48a9 | 2006-12-06 20:40:13 -0800 | [diff] [blame] | 2318 | return; |
| 2319 | } |
| 2320 | |
Amir Goldstein | d39195c | 2011-02-28 00:53:45 -0500 | [diff] [blame] | 2321 | /* Check if feature set would not allow a r/w mount */ |
| 2322 | if (!ext4_feature_set_ok(sb, 0)) { |
| 2323 | ext4_msg(sb, KERN_INFO, "Skipping orphan cleanup due to " |
| 2324 | "unknown ROCOMPAT features"); |
| 2325 | return; |
| 2326 | } |
| 2327 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2328 | if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { |
Eric Sandeen | c25f9bc | 2012-09-26 23:30:12 -0400 | [diff] [blame] | 2329 | /* don't clear list on RO mount w/ errors */ |
| 2330 | if (es->s_last_orphan && !(s_flags & MS_RDONLY)) { |
Dmitry Monakhov | 8447497 | 2014-09-16 14:52:03 -0400 | [diff] [blame] | 2331 | ext4_msg(sb, KERN_INFO, "Errors on filesystem, " |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2332 | "clearing orphan list.\n"); |
Eric Sandeen | c25f9bc | 2012-09-26 23:30:12 -0400 | [diff] [blame] | 2333 | es->s_last_orphan = 0; |
| 2334 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2335 | jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); |
| 2336 | return; |
| 2337 | } |
| 2338 | |
| 2339 | if (s_flags & MS_RDONLY) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 2340 | ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2341 | sb->s_flags &= ~MS_RDONLY; |
| 2342 | } |
| 2343 | #ifdef CONFIG_QUOTA |
| 2344 | /* Needed for iput() to work correctly and not trash data */ |
| 2345 | sb->s_flags |= MS_ACTIVE; |
| 2346 | /* Turn on quotas so that they are updated correctly */ |
Jan Kara | a2d4a64 | 2014-09-11 11:15:15 -0400 | [diff] [blame] | 2347 | for (i = 0; i < EXT4_MAXQUOTAS; i++) { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2348 | if (EXT4_SB(sb)->s_qf_names[i]) { |
| 2349 | int ret = ext4_quota_on_mount(sb, i); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2350 | if (ret < 0) |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 2351 | ext4_msg(sb, KERN_ERR, |
| 2352 | "Cannot turn on journaled " |
| 2353 | "quota: error %d", ret); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2354 | } |
| 2355 | } |
| 2356 | #endif |
| 2357 | |
| 2358 | while (es->s_last_orphan) { |
| 2359 | struct inode *inode; |
| 2360 | |
Vegard Nossum | c65d5c6 | 2016-07-14 23:21:35 -0400 | [diff] [blame] | 2361 | /* |
| 2362 | * We may have encountered an error during cleanup; if |
| 2363 | * so, skip the rest. |
| 2364 | */ |
| 2365 | if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { |
| 2366 | jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); |
| 2367 | es->s_last_orphan = 0; |
| 2368 | break; |
| 2369 | } |
| 2370 | |
Josef Bacik | 97bd42b | 2008-04-29 22:04:56 -0400 | [diff] [blame] | 2371 | inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); |
| 2372 | if (IS_ERR(inode)) { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2373 | es->s_last_orphan = 0; |
| 2374 | break; |
| 2375 | } |
| 2376 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2377 | list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); |
Christoph Hellwig | 871a293 | 2010-03-03 09:05:07 -0500 | [diff] [blame] | 2378 | dquot_initialize(inode); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2379 | if (inode->i_nlink) { |
Paul Taysom | 566370a | 2013-05-28 07:51:21 -0400 | [diff] [blame] | 2380 | if (test_opt(sb, DEBUG)) |
| 2381 | ext4_msg(sb, KERN_DEBUG, |
| 2382 | "%s: truncating inode %lu to %lld bytes", |
| 2383 | __func__, inode->i_ino, inode->i_size); |
Theodore Ts'o | e5f8eab8 | 2008-09-08 22:25:04 -0400 | [diff] [blame] | 2384 | jbd_debug(2, "truncating inode %lu to %lld bytes\n", |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2385 | inode->i_ino, inode->i_size); |
Al Viro | 5955102 | 2016-01-22 15:40:57 -0500 | [diff] [blame] | 2386 | inode_lock(inode); |
Lukas Czerner | 55f252c | 2013-05-27 23:32:35 -0400 | [diff] [blame] | 2387 | truncate_inode_pages(inode->i_mapping, inode->i_size); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2388 | ext4_truncate(inode); |
Al Viro | 5955102 | 2016-01-22 15:40:57 -0500 | [diff] [blame] | 2389 | inode_unlock(inode); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2390 | nr_truncates++; |
| 2391 | } else { |
Paul Taysom | 566370a | 2013-05-28 07:51:21 -0400 | [diff] [blame] | 2392 | if (test_opt(sb, DEBUG)) |
| 2393 | ext4_msg(sb, KERN_DEBUG, |
| 2394 | "%s: deleting unreferenced inode %lu", |
| 2395 | __func__, inode->i_ino); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2396 | jbd_debug(2, "deleting unreferenced inode %lu\n", |
| 2397 | inode->i_ino); |
| 2398 | nr_orphans++; |
| 2399 | } |
| 2400 | iput(inode); /* The delete magic happens here! */ |
| 2401 | } |
| 2402 | |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 2403 | #define PLURAL(x) (x), ((x) == 1) ? "" : "s" |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2404 | |
| 2405 | if (nr_orphans) |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 2406 | ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", |
| 2407 | PLURAL(nr_orphans)); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2408 | if (nr_truncates) |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 2409 | ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", |
| 2410 | PLURAL(nr_truncates)); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2411 | #ifdef CONFIG_QUOTA |
| 2412 | /* Turn quotas off */ |
Jan Kara | a2d4a64 | 2014-09-11 11:15:15 -0400 | [diff] [blame] | 2413 | for (i = 0; i < EXT4_MAXQUOTAS; i++) { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2414 | if (sb_dqopt(sb)->files[i]) |
Christoph Hellwig | 287a809 | 2010-05-19 07:16:45 -0400 | [diff] [blame] | 2415 | dquot_quota_off(sb, i); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2416 | } |
| 2417 | #endif |
| 2418 | sb->s_flags = s_flags; /* Restore MS_RDONLY status */ |
| 2419 | } |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 2420 | |
Eric Sandeen | cd2291a | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 2421 | /* |
| 2422 | * Maximal extent format file size. |
| 2423 | * Resulting logical blkno at s_maxbytes must fit in our on-disk |
| 2424 | * extent format containers, within a sector_t, and within i_blocks |
| 2425 | * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, |
| 2426 | * so that won't be a limiting factor. |
| 2427 | * |
Lukas Czerner | f17722f | 2011-06-06 00:05:17 -0400 | [diff] [blame] | 2428 | * However there is other limiting factor. We do store extents in the form |
| 2429 | * of starting block and length, hence the resulting length of the extent |
| 2430 | * covering maximum file size must fit into on-disk format containers as |
| 2431 | * well. Given that length is always by 1 unit bigger than max unit (because |
| 2432 | * we count 0 as well) we have to lower the s_maxbytes by one fs block. |
| 2433 | * |
Eric Sandeen | cd2291a | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 2434 | * Note, this does *not* consider any metadata overhead for vfs i_blocks. |
| 2435 | */ |
Theodore Ts'o | f287a1a | 2008-10-16 22:50:48 -0400 | [diff] [blame] | 2436 | static loff_t ext4_max_size(int blkbits, int has_huge_files) |
Eric Sandeen | cd2291a | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 2437 | { |
| 2438 | loff_t res; |
| 2439 | loff_t upper_limit = MAX_LFS_FILESIZE; |
| 2440 | |
| 2441 | /* small i_blocks in vfs inode? */ |
Theodore Ts'o | f287a1a | 2008-10-16 22:50:48 -0400 | [diff] [blame] | 2442 | if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { |
Eric Sandeen | cd2291a | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 2443 | /* |
Bartlomiej Zolnierkiewicz | 90c699a | 2009-06-19 08:08:50 +0200 | [diff] [blame] | 2444 | * CONFIG_LBDAF is not enabled implies the inode |
Eric Sandeen | cd2291a | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 2445 | * i_block represent total blocks in 512 bytes |
| 2446 | * 32 == size of vfs inode i_blocks * 8 |
| 2447 | */ |
| 2448 | upper_limit = (1LL << 32) - 1; |
| 2449 | |
| 2450 | /* total blocks in file system block size */ |
| 2451 | upper_limit >>= (blkbits - 9); |
| 2452 | upper_limit <<= blkbits; |
| 2453 | } |
| 2454 | |
Lukas Czerner | f17722f | 2011-06-06 00:05:17 -0400 | [diff] [blame] | 2455 | /* |
| 2456 | * 32-bit extent-start container, ee_block. We lower the maxbytes |
| 2457 | * by one fs block, so ee_len can cover the extent of maximum file |
| 2458 | * size |
| 2459 | */ |
| 2460 | res = (1LL << 32) - 1; |
Eric Sandeen | cd2291a | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 2461 | res <<= blkbits; |
Eric Sandeen | cd2291a | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 2462 | |
| 2463 | /* Sanity check against vm- & vfs- imposed limits */ |
| 2464 | if (res > upper_limit) |
| 2465 | res = upper_limit; |
| 2466 | |
| 2467 | return res; |
| 2468 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2469 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2470 | /* |
Eric Sandeen | cd2291a | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 2471 | * 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] | 2472 | * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. |
| 2473 | * 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] | 2474 | */ |
Theodore Ts'o | f287a1a | 2008-10-16 22:50:48 -0400 | [diff] [blame] | 2475 | 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] | 2476 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2477 | loff_t res = EXT4_NDIR_BLOCKS; |
Aneesh Kumar K.V | 0fc1b45 | 2008-01-28 23:58:26 -0500 | [diff] [blame] | 2478 | int meta_blocks; |
| 2479 | loff_t upper_limit; |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 2480 | /* This is calculated to be the largest file size for a dense, block |
| 2481 | * mapped file such that the file's total number of 512-byte sectors, |
| 2482 | * including data and all indirect blocks, does not exceed (2^48 - 1). |
| 2483 | * |
| 2484 | * __u32 i_blocks_lo and _u16 i_blocks_high represent the total |
| 2485 | * number of 512-byte sectors of the file. |
Aneesh Kumar K.V | 0fc1b45 | 2008-01-28 23:58:26 -0500 | [diff] [blame] | 2486 | */ |
| 2487 | |
Theodore Ts'o | f287a1a | 2008-10-16 22:50:48 -0400 | [diff] [blame] | 2488 | if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { |
Aneesh Kumar K.V | 0fc1b45 | 2008-01-28 23:58:26 -0500 | [diff] [blame] | 2489 | /* |
Bartlomiej Zolnierkiewicz | 90c699a | 2009-06-19 08:08:50 +0200 | [diff] [blame] | 2490 | * !has_huge_files or CONFIG_LBDAF not enabled implies that |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 2491 | * the inode i_block field represents total file blocks in |
| 2492 | * 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] | 2493 | */ |
| 2494 | upper_limit = (1LL << 32) - 1; |
| 2495 | |
| 2496 | /* total blocks in file system block size */ |
| 2497 | upper_limit >>= (bits - 9); |
| 2498 | |
| 2499 | } else { |
Aneesh Kumar K.V | 8180a56 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 2500 | /* |
| 2501 | * We use 48 bit ext4_inode i_blocks |
| 2502 | * With EXT4_HUGE_FILE_FL set the i_blocks |
| 2503 | * represent total number of blocks in |
| 2504 | * file system block size |
| 2505 | */ |
Aneesh Kumar K.V | 0fc1b45 | 2008-01-28 23:58:26 -0500 | [diff] [blame] | 2506 | upper_limit = (1LL << 48) - 1; |
| 2507 | |
Aneesh Kumar K.V | 0fc1b45 | 2008-01-28 23:58:26 -0500 | [diff] [blame] | 2508 | } |
| 2509 | |
| 2510 | /* indirect blocks */ |
| 2511 | meta_blocks = 1; |
| 2512 | /* double indirect blocks */ |
| 2513 | meta_blocks += 1 + (1LL << (bits-2)); |
| 2514 | /* tripple indirect blocks */ |
| 2515 | meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); |
| 2516 | |
| 2517 | upper_limit -= meta_blocks; |
| 2518 | upper_limit <<= bits; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2519 | |
| 2520 | res += 1LL << (bits-2); |
| 2521 | res += 1LL << (2*(bits-2)); |
| 2522 | res += 1LL << (3*(bits-2)); |
| 2523 | res <<= bits; |
| 2524 | if (res > upper_limit) |
| 2525 | res = upper_limit; |
Aneesh Kumar K.V | 0fc1b45 | 2008-01-28 23:58:26 -0500 | [diff] [blame] | 2526 | |
| 2527 | if (res > MAX_LFS_FILESIZE) |
| 2528 | res = MAX_LFS_FILESIZE; |
| 2529 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2530 | return res; |
| 2531 | } |
| 2532 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2533 | static ext4_fsblk_t descriptor_loc(struct super_block *sb, |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 2534 | ext4_fsblk_t logical_sb_block, int nr) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2535 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2536 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
Avantika Mathur | fd2d429 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 2537 | ext4_group_t bg, first_meta_bg; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2538 | int has_super = 0; |
| 2539 | |
| 2540 | first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); |
| 2541 | |
Darrick J. Wong | e2b911c | 2015-10-17 16:18:43 -0400 | [diff] [blame] | 2542 | if (!ext4_has_feature_meta_bg(sb) || nr < first_meta_bg) |
Andrew Morton | 70bbb3e | 2006-10-11 01:21:20 -0700 | [diff] [blame] | 2543 | return logical_sb_block + nr + 1; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2544 | bg = sbi->s_desc_per_block * nr; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2545 | if (ext4_bg_has_super(sb, bg)) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2546 | has_super = 1; |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 2547 | |
Darrick J. Wong | bd63f6b | 2014-05-12 10:06:27 -0400 | [diff] [blame] | 2548 | /* |
| 2549 | * If we have a meta_bg fs with 1k blocks, group 0's GDT is at |
| 2550 | * block 2, not 1. If s_first_data_block == 0 (bigalloc is enabled |
| 2551 | * on modern mke2fs or blksize > 1k on older mke2fs) then we must |
| 2552 | * compensate. |
| 2553 | */ |
| 2554 | if (sb->s_blocksize == 1024 && nr == 0 && |
| 2555 | le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block) == 0) |
| 2556 | has_super++; |
| 2557 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2558 | return (has_super + ext4_group_first_block_no(sb, bg)); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2559 | } |
| 2560 | |
Alex Tomas | c9de560 | 2008-01-29 00:19:52 -0500 | [diff] [blame] | 2561 | /** |
| 2562 | * ext4_get_stripe_size: Get the stripe size. |
| 2563 | * @sbi: In memory super block info |
| 2564 | * |
| 2565 | * If we have specified it via mount option, then |
| 2566 | * use the mount option value. If the value specified at mount time is |
| 2567 | * greater than the blocks per group use the super block value. |
| 2568 | * If the super block value is greater than blocks per group return 0. |
| 2569 | * Allocator needs it be less than blocks per group. |
| 2570 | * |
| 2571 | */ |
| 2572 | static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) |
| 2573 | { |
| 2574 | unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); |
| 2575 | unsigned long stripe_width = |
| 2576 | le32_to_cpu(sbi->s_es->s_raid_stripe_width); |
Dan Ehrenberg | 3eb0865 | 2011-07-17 21:18:51 -0400 | [diff] [blame] | 2577 | int ret; |
Alex Tomas | c9de560 | 2008-01-29 00:19:52 -0500 | [diff] [blame] | 2578 | |
| 2579 | if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) |
Dan Ehrenberg | 3eb0865 | 2011-07-17 21:18:51 -0400 | [diff] [blame] | 2580 | ret = sbi->s_stripe; |
| 2581 | else if (stripe_width <= sbi->s_blocks_per_group) |
| 2582 | ret = stripe_width; |
| 2583 | else if (stride <= sbi->s_blocks_per_group) |
| 2584 | ret = stride; |
| 2585 | else |
| 2586 | ret = 0; |
Alex Tomas | c9de560 | 2008-01-29 00:19:52 -0500 | [diff] [blame] | 2587 | |
Dan Ehrenberg | 3eb0865 | 2011-07-17 21:18:51 -0400 | [diff] [blame] | 2588 | /* |
| 2589 | * If the stripe width is 1, this makes no sense and |
| 2590 | * we set it to 0 to turn off stripe handling code. |
| 2591 | */ |
| 2592 | if (ret <= 1) |
| 2593 | ret = 0; |
Alex Tomas | c9de560 | 2008-01-29 00:19:52 -0500 | [diff] [blame] | 2594 | |
Dan Ehrenberg | 3eb0865 | 2011-07-17 21:18:51 -0400 | [diff] [blame] | 2595 | return ret; |
Alex Tomas | c9de560 | 2008-01-29 00:19:52 -0500 | [diff] [blame] | 2596 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2597 | |
Eric Sandeen | a13fb1a | 2009-08-18 00:20:23 -0400 | [diff] [blame] | 2598 | /* |
| 2599 | * Check whether this filesystem can be mounted based on |
| 2600 | * the features present and the RDONLY/RDWR mount requested. |
| 2601 | * Returns 1 if this filesystem can be mounted as requested, |
| 2602 | * 0 if it cannot be. |
| 2603 | */ |
| 2604 | static int ext4_feature_set_ok(struct super_block *sb, int readonly) |
| 2605 | { |
Darrick J. Wong | e2b911c | 2015-10-17 16:18:43 -0400 | [diff] [blame] | 2606 | if (ext4_has_unknown_ext4_incompat_features(sb)) { |
Eric Sandeen | a13fb1a | 2009-08-18 00:20:23 -0400 | [diff] [blame] | 2607 | ext4_msg(sb, KERN_ERR, |
| 2608 | "Couldn't mount because of " |
| 2609 | "unsupported optional features (%x)", |
| 2610 | (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & |
| 2611 | ~EXT4_FEATURE_INCOMPAT_SUPP)); |
| 2612 | return 0; |
| 2613 | } |
| 2614 | |
| 2615 | if (readonly) |
| 2616 | return 1; |
| 2617 | |
Darrick J. Wong | e2b911c | 2015-10-17 16:18:43 -0400 | [diff] [blame] | 2618 | if (ext4_has_feature_readonly(sb)) { |
Darrick J. Wong | 2cb5cc8 | 2015-02-12 22:31:21 -0500 | [diff] [blame] | 2619 | ext4_msg(sb, KERN_INFO, "filesystem is read-only"); |
| 2620 | sb->s_flags |= MS_RDONLY; |
| 2621 | return 1; |
| 2622 | } |
| 2623 | |
Eric Sandeen | a13fb1a | 2009-08-18 00:20:23 -0400 | [diff] [blame] | 2624 | /* Check that feature set is OK for a read-write mount */ |
Darrick J. Wong | e2b911c | 2015-10-17 16:18:43 -0400 | [diff] [blame] | 2625 | if (ext4_has_unknown_ext4_ro_compat_features(sb)) { |
Eric Sandeen | a13fb1a | 2009-08-18 00:20:23 -0400 | [diff] [blame] | 2626 | ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " |
| 2627 | "unsupported optional features (%x)", |
| 2628 | (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & |
| 2629 | ~EXT4_FEATURE_RO_COMPAT_SUPP)); |
| 2630 | return 0; |
| 2631 | } |
| 2632 | /* |
| 2633 | * Large file size enabled file system can only be mounted |
| 2634 | * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF |
| 2635 | */ |
Darrick J. Wong | e2b911c | 2015-10-17 16:18:43 -0400 | [diff] [blame] | 2636 | if (ext4_has_feature_huge_file(sb)) { |
Eric Sandeen | a13fb1a | 2009-08-18 00:20:23 -0400 | [diff] [blame] | 2637 | if (sizeof(blkcnt_t) < sizeof(u64)) { |
| 2638 | ext4_msg(sb, KERN_ERR, "Filesystem with huge files " |
| 2639 | "cannot be mounted RDWR without " |
| 2640 | "CONFIG_LBDAF"); |
| 2641 | return 0; |
| 2642 | } |
| 2643 | } |
Darrick J. Wong | e2b911c | 2015-10-17 16:18:43 -0400 | [diff] [blame] | 2644 | if (ext4_has_feature_bigalloc(sb) && !ext4_has_feature_extents(sb)) { |
Theodore Ts'o | bab08ab | 2011-09-09 18:36:51 -0400 | [diff] [blame] | 2645 | ext4_msg(sb, KERN_ERR, |
| 2646 | "Can't support bigalloc feature without " |
| 2647 | "extents feature\n"); |
| 2648 | return 0; |
| 2649 | } |
Aditya Kali | 7c319d3 | 2012-07-22 20:21:31 -0400 | [diff] [blame] | 2650 | |
| 2651 | #ifndef CONFIG_QUOTA |
Darrick J. Wong | e2b911c | 2015-10-17 16:18:43 -0400 | [diff] [blame] | 2652 | if (ext4_has_feature_quota(sb) && !readonly) { |
Aditya Kali | 7c319d3 | 2012-07-22 20:21:31 -0400 | [diff] [blame] | 2653 | ext4_msg(sb, KERN_ERR, |
| 2654 | "Filesystem with quota feature cannot be mounted RDWR " |
| 2655 | "without CONFIG_QUOTA"); |
| 2656 | return 0; |
| 2657 | } |
Li Xi | 689c958 | 2016-01-08 16:01:22 -0500 | [diff] [blame] | 2658 | if (ext4_has_feature_project(sb) && !readonly) { |
| 2659 | ext4_msg(sb, KERN_ERR, |
| 2660 | "Filesystem with project quota feature cannot be mounted RDWR " |
| 2661 | "without CONFIG_QUOTA"); |
| 2662 | return 0; |
| 2663 | } |
Aditya Kali | 7c319d3 | 2012-07-22 20:21:31 -0400 | [diff] [blame] | 2664 | #endif /* CONFIG_QUOTA */ |
Eric Sandeen | a13fb1a | 2009-08-18 00:20:23 -0400 | [diff] [blame] | 2665 | return 1; |
| 2666 | } |
| 2667 | |
Theodore Ts'o | 66e61a9 | 2010-07-27 11:56:04 -0400 | [diff] [blame] | 2668 | /* |
| 2669 | * This function is called once a day if we have errors logged |
| 2670 | * on the file system |
| 2671 | */ |
| 2672 | static void print_daily_error_info(unsigned long arg) |
| 2673 | { |
| 2674 | struct super_block *sb = (struct super_block *) arg; |
| 2675 | struct ext4_sb_info *sbi; |
| 2676 | struct ext4_super_block *es; |
| 2677 | |
| 2678 | sbi = EXT4_SB(sb); |
| 2679 | es = sbi->s_es; |
| 2680 | |
| 2681 | if (es->s_error_count) |
Theodore Ts'o | ae0f78d | 2014-07-05 18:40:52 -0400 | [diff] [blame] | 2682 | /* fsck newer than v1.41.13 is needed to clean this condition. */ |
| 2683 | ext4_msg(sb, KERN_NOTICE, "error count since last fsck: %u", |
Theodore Ts'o | 66e61a9 | 2010-07-27 11:56:04 -0400 | [diff] [blame] | 2684 | le32_to_cpu(es->s_error_count)); |
| 2685 | if (es->s_first_error_time) { |
Theodore Ts'o | ae0f78d | 2014-07-05 18:40:52 -0400 | [diff] [blame] | 2686 | 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] | 2687 | sb->s_id, le32_to_cpu(es->s_first_error_time), |
| 2688 | (int) sizeof(es->s_first_error_func), |
| 2689 | es->s_first_error_func, |
| 2690 | le32_to_cpu(es->s_first_error_line)); |
| 2691 | if (es->s_first_error_ino) |
| 2692 | printk(": inode %u", |
| 2693 | le32_to_cpu(es->s_first_error_ino)); |
| 2694 | if (es->s_first_error_block) |
| 2695 | printk(": block %llu", (unsigned long long) |
| 2696 | le64_to_cpu(es->s_first_error_block)); |
| 2697 | printk("\n"); |
| 2698 | } |
| 2699 | if (es->s_last_error_time) { |
Theodore Ts'o | ae0f78d | 2014-07-05 18:40:52 -0400 | [diff] [blame] | 2700 | 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] | 2701 | sb->s_id, le32_to_cpu(es->s_last_error_time), |
| 2702 | (int) sizeof(es->s_last_error_func), |
| 2703 | es->s_last_error_func, |
| 2704 | le32_to_cpu(es->s_last_error_line)); |
| 2705 | if (es->s_last_error_ino) |
| 2706 | printk(": inode %u", |
| 2707 | le32_to_cpu(es->s_last_error_ino)); |
| 2708 | if (es->s_last_error_block) |
| 2709 | printk(": block %llu", (unsigned long long) |
| 2710 | le64_to_cpu(es->s_last_error_block)); |
| 2711 | printk("\n"); |
| 2712 | } |
| 2713 | mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ |
| 2714 | } |
| 2715 | |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2716 | /* Find next suitable group and run ext4_init_inode_table */ |
| 2717 | static int ext4_run_li_request(struct ext4_li_request *elr) |
| 2718 | { |
| 2719 | struct ext4_group_desc *gdp = NULL; |
| 2720 | ext4_group_t group, ngroups; |
| 2721 | struct super_block *sb; |
| 2722 | unsigned long timeout = 0; |
| 2723 | int ret = 0; |
| 2724 | |
| 2725 | sb = elr->lr_super; |
| 2726 | ngroups = EXT4_SB(sb)->s_groups_count; |
| 2727 | |
Jan Kara | 8e8ad8a | 2012-06-12 16:20:38 +0200 | [diff] [blame] | 2728 | sb_start_write(sb); |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2729 | for (group = elr->lr_next_group; group < ngroups; group++) { |
| 2730 | gdp = ext4_get_group_desc(sb, group, NULL); |
| 2731 | if (!gdp) { |
| 2732 | ret = 1; |
| 2733 | break; |
| 2734 | } |
| 2735 | |
| 2736 | if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) |
| 2737 | break; |
| 2738 | } |
| 2739 | |
Theodore Ts'o | 7f51186 | 2013-01-13 08:41:45 -0500 | [diff] [blame] | 2740 | if (group >= ngroups) |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2741 | ret = 1; |
| 2742 | |
| 2743 | if (!ret) { |
| 2744 | timeout = jiffies; |
| 2745 | ret = ext4_init_inode_table(sb, group, |
| 2746 | elr->lr_timeout ? 0 : 1); |
| 2747 | if (elr->lr_timeout == 0) { |
Lukas Czerner | 51ce651 | 2011-05-20 13:55:16 -0400 | [diff] [blame] | 2748 | timeout = (jiffies - timeout) * |
| 2749 | elr->lr_sbi->s_li_wait_mult; |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2750 | elr->lr_timeout = timeout; |
| 2751 | } |
| 2752 | elr->lr_next_sched = jiffies + elr->lr_timeout; |
| 2753 | elr->lr_next_group = group + 1; |
| 2754 | } |
Jan Kara | 8e8ad8a | 2012-06-12 16:20:38 +0200 | [diff] [blame] | 2755 | sb_end_write(sb); |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2756 | |
| 2757 | return ret; |
| 2758 | } |
| 2759 | |
| 2760 | /* |
| 2761 | * Remove lr_request from the list_request and free the |
Lukas Czerner | 4ed5c03 | 2011-05-20 13:49:04 -0400 | [diff] [blame] | 2762 | * request structure. Should be called with li_list_mtx held |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2763 | */ |
| 2764 | static void ext4_remove_li_request(struct ext4_li_request *elr) |
| 2765 | { |
| 2766 | struct ext4_sb_info *sbi; |
| 2767 | |
| 2768 | if (!elr) |
| 2769 | return; |
| 2770 | |
| 2771 | sbi = elr->lr_sbi; |
| 2772 | |
| 2773 | list_del(&elr->lr_request); |
| 2774 | sbi->s_li_request = NULL; |
| 2775 | kfree(elr); |
| 2776 | } |
| 2777 | |
| 2778 | static void ext4_unregister_li_request(struct super_block *sb) |
| 2779 | { |
Lukas Czerner | 1bb933f | 2011-05-20 13:55:29 -0400 | [diff] [blame] | 2780 | mutex_lock(&ext4_li_mtx); |
| 2781 | if (!ext4_li_info) { |
| 2782 | mutex_unlock(&ext4_li_mtx); |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2783 | return; |
Lukas Czerner | 1bb933f | 2011-05-20 13:55:29 -0400 | [diff] [blame] | 2784 | } |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2785 | |
| 2786 | mutex_lock(&ext4_li_info->li_list_mtx); |
Lukas Czerner | 1bb933f | 2011-05-20 13:55:29 -0400 | [diff] [blame] | 2787 | ext4_remove_li_request(EXT4_SB(sb)->s_li_request); |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2788 | mutex_unlock(&ext4_li_info->li_list_mtx); |
Lukas Czerner | 1bb933f | 2011-05-20 13:55:29 -0400 | [diff] [blame] | 2789 | mutex_unlock(&ext4_li_mtx); |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2790 | } |
| 2791 | |
Eric Sandeen | 8f1f745 | 2011-02-03 14:33:15 -0500 | [diff] [blame] | 2792 | static struct task_struct *ext4_lazyinit_task; |
| 2793 | |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2794 | /* |
| 2795 | * This is the function where ext4lazyinit thread lives. It walks |
| 2796 | * through the request list searching for next scheduled filesystem. |
| 2797 | * When such a fs is found, run the lazy initialization request |
| 2798 | * (ext4_rn_li_request) and keep track of the time spend in this |
| 2799 | * function. Based on that time we compute next schedule time of |
| 2800 | * the request. When walking through the list is complete, compute |
| 2801 | * next waking time and put itself into sleep. |
| 2802 | */ |
| 2803 | static int ext4_lazyinit_thread(void *arg) |
| 2804 | { |
| 2805 | struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; |
| 2806 | struct list_head *pos, *n; |
| 2807 | struct ext4_li_request *elr; |
Lukas Czerner | 4ed5c03 | 2011-05-20 13:49:04 -0400 | [diff] [blame] | 2808 | unsigned long next_wakeup, cur; |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2809 | |
| 2810 | BUG_ON(NULL == eli); |
| 2811 | |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2812 | cont_thread: |
| 2813 | while (true) { |
| 2814 | next_wakeup = MAX_JIFFY_OFFSET; |
| 2815 | |
| 2816 | mutex_lock(&eli->li_list_mtx); |
| 2817 | if (list_empty(&eli->li_request_list)) { |
| 2818 | mutex_unlock(&eli->li_list_mtx); |
| 2819 | goto exit_thread; |
| 2820 | } |
| 2821 | |
| 2822 | list_for_each_safe(pos, n, &eli->li_request_list) { |
| 2823 | elr = list_entry(pos, struct ext4_li_request, |
| 2824 | lr_request); |
| 2825 | |
Theodore Ts'o | b2c78cd | 2010-11-02 14:19:30 -0400 | [diff] [blame] | 2826 | if (time_after_eq(jiffies, elr->lr_next_sched)) { |
| 2827 | if (ext4_run_li_request(elr) != 0) { |
| 2828 | /* error, remove the lazy_init job */ |
| 2829 | ext4_remove_li_request(elr); |
| 2830 | continue; |
| 2831 | } |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2832 | } |
| 2833 | |
| 2834 | if (time_before(elr->lr_next_sched, next_wakeup)) |
| 2835 | next_wakeup = elr->lr_next_sched; |
| 2836 | } |
| 2837 | mutex_unlock(&eli->li_list_mtx); |
| 2838 | |
Tejun Heo | a0acae0 | 2011-11-21 12:32:22 -0800 | [diff] [blame] | 2839 | try_to_freeze(); |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2840 | |
Lukas Czerner | 4ed5c03 | 2011-05-20 13:49:04 -0400 | [diff] [blame] | 2841 | cur = jiffies; |
| 2842 | if ((time_after_eq(cur, next_wakeup)) || |
Lukas Czerner | f4245bd | 2010-11-02 14:07:17 -0400 | [diff] [blame] | 2843 | (MAX_JIFFY_OFFSET == next_wakeup)) { |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2844 | cond_resched(); |
| 2845 | continue; |
| 2846 | } |
| 2847 | |
Lukas Czerner | 4ed5c03 | 2011-05-20 13:49:04 -0400 | [diff] [blame] | 2848 | schedule_timeout_interruptible(next_wakeup - cur); |
| 2849 | |
Eric Sandeen | 8f1f745 | 2011-02-03 14:33:15 -0500 | [diff] [blame] | 2850 | if (kthread_should_stop()) { |
| 2851 | ext4_clear_request_list(); |
| 2852 | goto exit_thread; |
| 2853 | } |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2854 | } |
| 2855 | |
| 2856 | exit_thread: |
| 2857 | /* |
| 2858 | * It looks like the request list is empty, but we need |
| 2859 | * to check it under the li_list_mtx lock, to prevent any |
| 2860 | * additions into it, and of course we should lock ext4_li_mtx |
| 2861 | * to atomically free the list and ext4_li_info, because at |
| 2862 | * this point another ext4 filesystem could be registering |
| 2863 | * new one. |
| 2864 | */ |
| 2865 | mutex_lock(&ext4_li_mtx); |
| 2866 | mutex_lock(&eli->li_list_mtx); |
| 2867 | if (!list_empty(&eli->li_request_list)) { |
| 2868 | mutex_unlock(&eli->li_list_mtx); |
| 2869 | mutex_unlock(&ext4_li_mtx); |
| 2870 | goto cont_thread; |
| 2871 | } |
| 2872 | mutex_unlock(&eli->li_list_mtx); |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2873 | kfree(ext4_li_info); |
| 2874 | ext4_li_info = NULL; |
| 2875 | mutex_unlock(&ext4_li_mtx); |
| 2876 | |
| 2877 | return 0; |
| 2878 | } |
| 2879 | |
| 2880 | static void ext4_clear_request_list(void) |
| 2881 | { |
| 2882 | struct list_head *pos, *n; |
| 2883 | struct ext4_li_request *elr; |
| 2884 | |
| 2885 | mutex_lock(&ext4_li_info->li_list_mtx); |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2886 | list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { |
| 2887 | elr = list_entry(pos, struct ext4_li_request, |
| 2888 | lr_request); |
| 2889 | ext4_remove_li_request(elr); |
| 2890 | } |
| 2891 | mutex_unlock(&ext4_li_info->li_list_mtx); |
| 2892 | } |
| 2893 | |
| 2894 | static int ext4_run_lazyinit_thread(void) |
| 2895 | { |
Eric Sandeen | 8f1f745 | 2011-02-03 14:33:15 -0500 | [diff] [blame] | 2896 | ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, |
| 2897 | ext4_li_info, "ext4lazyinit"); |
| 2898 | if (IS_ERR(ext4_lazyinit_task)) { |
| 2899 | int err = PTR_ERR(ext4_lazyinit_task); |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2900 | ext4_clear_request_list(); |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2901 | kfree(ext4_li_info); |
| 2902 | ext4_li_info = NULL; |
Theodore Ts'o | 92b9781 | 2012-03-19 23:41:49 -0400 | [diff] [blame] | 2903 | printk(KERN_CRIT "EXT4-fs: error %d creating inode table " |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2904 | "initialization thread\n", |
| 2905 | err); |
| 2906 | return err; |
| 2907 | } |
| 2908 | ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2909 | return 0; |
| 2910 | } |
| 2911 | |
| 2912 | /* |
| 2913 | * Check whether it make sense to run itable init. thread or not. |
| 2914 | * If there is at least one uninitialized inode table, return |
| 2915 | * corresponding group number, else the loop goes through all |
| 2916 | * groups and return total number of groups. |
| 2917 | */ |
| 2918 | static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) |
| 2919 | { |
| 2920 | ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; |
| 2921 | struct ext4_group_desc *gdp = NULL; |
| 2922 | |
| 2923 | for (group = 0; group < ngroups; group++) { |
| 2924 | gdp = ext4_get_group_desc(sb, group, NULL); |
| 2925 | if (!gdp) |
| 2926 | continue; |
| 2927 | |
| 2928 | if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) |
| 2929 | break; |
| 2930 | } |
| 2931 | |
| 2932 | return group; |
| 2933 | } |
| 2934 | |
| 2935 | static int ext4_li_info_new(void) |
| 2936 | { |
| 2937 | struct ext4_lazy_init *eli = NULL; |
| 2938 | |
| 2939 | eli = kzalloc(sizeof(*eli), GFP_KERNEL); |
| 2940 | if (!eli) |
| 2941 | return -ENOMEM; |
| 2942 | |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2943 | INIT_LIST_HEAD(&eli->li_request_list); |
| 2944 | mutex_init(&eli->li_list_mtx); |
| 2945 | |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2946 | eli->li_state |= EXT4_LAZYINIT_QUIT; |
| 2947 | |
| 2948 | ext4_li_info = eli; |
| 2949 | |
| 2950 | return 0; |
| 2951 | } |
| 2952 | |
| 2953 | static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, |
| 2954 | ext4_group_t start) |
| 2955 | { |
| 2956 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
| 2957 | struct ext4_li_request *elr; |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2958 | |
| 2959 | elr = kzalloc(sizeof(*elr), GFP_KERNEL); |
| 2960 | if (!elr) |
| 2961 | return NULL; |
| 2962 | |
| 2963 | elr->lr_super = sb; |
| 2964 | elr->lr_sbi = sbi; |
| 2965 | elr->lr_next_group = start; |
| 2966 | |
| 2967 | /* |
| 2968 | * Randomize first schedule time of the request to |
| 2969 | * spread the inode table initialization requests |
| 2970 | * better. |
| 2971 | */ |
Theodore Ts'o | dd1f723 | 2013-11-08 00:14:53 -0500 | [diff] [blame] | 2972 | elr->lr_next_sched = jiffies + (prandom_u32() % |
| 2973 | (EXT4_DEF_LI_MAX_START_DELAY * HZ)); |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2974 | return elr; |
| 2975 | } |
| 2976 | |
Theodore Ts'o | 7f51186 | 2013-01-13 08:41:45 -0500 | [diff] [blame] | 2977 | int ext4_register_li_request(struct super_block *sb, |
| 2978 | ext4_group_t first_not_zeroed) |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2979 | { |
| 2980 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
Theodore Ts'o | 7f51186 | 2013-01-13 08:41:45 -0500 | [diff] [blame] | 2981 | struct ext4_li_request *elr = NULL; |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2982 | ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; |
Andrew Morton | 6c5a6cb | 2011-01-10 12:30:17 -0500 | [diff] [blame] | 2983 | int ret = 0; |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2984 | |
Theodore Ts'o | 7f51186 | 2013-01-13 08:41:45 -0500 | [diff] [blame] | 2985 | mutex_lock(&ext4_li_mtx); |
Lukas Czerner | 51ce651 | 2011-05-20 13:55:16 -0400 | [diff] [blame] | 2986 | if (sbi->s_li_request != NULL) { |
| 2987 | /* |
| 2988 | * Reset timeout so it can be computed again, because |
| 2989 | * s_li_wait_mult might have changed. |
| 2990 | */ |
| 2991 | sbi->s_li_request->lr_timeout = 0; |
Theodore Ts'o | 7f51186 | 2013-01-13 08:41:45 -0500 | [diff] [blame] | 2992 | goto out; |
Lukas Czerner | 51ce651 | 2011-05-20 13:55:16 -0400 | [diff] [blame] | 2993 | } |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2994 | |
| 2995 | if (first_not_zeroed == ngroups || |
| 2996 | (sb->s_flags & MS_RDONLY) || |
Tao Ma | 55ff384 | 2011-05-09 10:28:41 -0400 | [diff] [blame] | 2997 | !test_opt(sb, INIT_INODE_TABLE)) |
Theodore Ts'o | 7f51186 | 2013-01-13 08:41:45 -0500 | [diff] [blame] | 2998 | goto out; |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2999 | |
| 3000 | elr = ext4_li_request_new(sb, first_not_zeroed); |
Theodore Ts'o | 7f51186 | 2013-01-13 08:41:45 -0500 | [diff] [blame] | 3001 | if (!elr) { |
| 3002 | ret = -ENOMEM; |
| 3003 | goto out; |
| 3004 | } |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 3005 | |
| 3006 | if (NULL == ext4_li_info) { |
| 3007 | ret = ext4_li_info_new(); |
| 3008 | if (ret) |
| 3009 | goto out; |
| 3010 | } |
| 3011 | |
| 3012 | mutex_lock(&ext4_li_info->li_list_mtx); |
| 3013 | list_add(&elr->lr_request, &ext4_li_info->li_request_list); |
| 3014 | mutex_unlock(&ext4_li_info->li_list_mtx); |
| 3015 | |
| 3016 | sbi->s_li_request = elr; |
Tao Ma | 46e4690 | 2011-04-04 16:00:49 -0400 | [diff] [blame] | 3017 | /* |
| 3018 | * set elr to NULL here since it has been inserted to |
| 3019 | * the request_list and the removal and free of it is |
| 3020 | * handled by ext4_clear_request_list from now on. |
| 3021 | */ |
| 3022 | elr = NULL; |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 3023 | |
| 3024 | if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { |
| 3025 | ret = ext4_run_lazyinit_thread(); |
| 3026 | if (ret) |
| 3027 | goto out; |
| 3028 | } |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 3029 | out: |
Nicolas Kaiser | beed5ecb | 2010-10-27 22:08:42 -0400 | [diff] [blame] | 3030 | mutex_unlock(&ext4_li_mtx); |
| 3031 | if (ret) |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 3032 | kfree(elr); |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 3033 | return ret; |
| 3034 | } |
| 3035 | |
| 3036 | /* |
| 3037 | * We do not need to lock anything since this is called on |
| 3038 | * module unload. |
| 3039 | */ |
| 3040 | static void ext4_destroy_lazyinit_thread(void) |
| 3041 | { |
| 3042 | /* |
| 3043 | * If thread exited earlier |
| 3044 | * there's nothing to be done. |
| 3045 | */ |
Eric Sandeen | 8f1f745 | 2011-02-03 14:33:15 -0500 | [diff] [blame] | 3046 | if (!ext4_li_info || !ext4_lazyinit_task) |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 3047 | return; |
| 3048 | |
Eric Sandeen | 8f1f745 | 2011-02-03 14:33:15 -0500 | [diff] [blame] | 3049 | kthread_stop(ext4_lazyinit_task); |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 3050 | } |
| 3051 | |
Darrick J. Wong | 25ed6e8 | 2012-05-27 07:48:56 -0400 | [diff] [blame] | 3052 | static int set_journal_csum_feature_set(struct super_block *sb) |
| 3053 | { |
| 3054 | int ret = 1; |
| 3055 | int compat, incompat; |
| 3056 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
| 3057 | |
Dmitry Monakhov | 9aa5d32 | 2014-10-13 03:36:16 -0400 | [diff] [blame] | 3058 | if (ext4_has_metadata_csum(sb)) { |
Darrick J. Wong | db9ee22 | 2014-08-27 18:40:07 -0400 | [diff] [blame] | 3059 | /* journal checksum v3 */ |
Darrick J. Wong | 25ed6e8 | 2012-05-27 07:48:56 -0400 | [diff] [blame] | 3060 | compat = 0; |
Darrick J. Wong | db9ee22 | 2014-08-27 18:40:07 -0400 | [diff] [blame] | 3061 | incompat = JBD2_FEATURE_INCOMPAT_CSUM_V3; |
Darrick J. Wong | 25ed6e8 | 2012-05-27 07:48:56 -0400 | [diff] [blame] | 3062 | } else { |
| 3063 | /* journal checksum v1 */ |
| 3064 | compat = JBD2_FEATURE_COMPAT_CHECKSUM; |
| 3065 | incompat = 0; |
| 3066 | } |
| 3067 | |
Darrick J. Wong | feb8c6d | 2014-09-11 11:38:21 -0400 | [diff] [blame] | 3068 | jbd2_journal_clear_features(sbi->s_journal, |
| 3069 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, |
| 3070 | JBD2_FEATURE_INCOMPAT_CSUM_V3 | |
| 3071 | JBD2_FEATURE_INCOMPAT_CSUM_V2); |
Darrick J. Wong | 25ed6e8 | 2012-05-27 07:48:56 -0400 | [diff] [blame] | 3072 | if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { |
| 3073 | ret = jbd2_journal_set_features(sbi->s_journal, |
| 3074 | compat, 0, |
| 3075 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | |
| 3076 | incompat); |
| 3077 | } else if (test_opt(sb, JOURNAL_CHECKSUM)) { |
| 3078 | ret = jbd2_journal_set_features(sbi->s_journal, |
| 3079 | compat, 0, |
| 3080 | incompat); |
| 3081 | jbd2_journal_clear_features(sbi->s_journal, 0, 0, |
| 3082 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); |
| 3083 | } else { |
Darrick J. Wong | feb8c6d | 2014-09-11 11:38:21 -0400 | [diff] [blame] | 3084 | jbd2_journal_clear_features(sbi->s_journal, 0, 0, |
| 3085 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); |
Darrick J. Wong | 25ed6e8 | 2012-05-27 07:48:56 -0400 | [diff] [blame] | 3086 | } |
| 3087 | |
| 3088 | return ret; |
| 3089 | } |
| 3090 | |
Theodore Ts'o | 952fc18 | 2012-07-09 16:27:05 -0400 | [diff] [blame] | 3091 | /* |
| 3092 | * Note: calculating the overhead so we can be compatible with |
| 3093 | * historical BSD practice is quite difficult in the face of |
| 3094 | * clusters/bigalloc. This is because multiple metadata blocks from |
| 3095 | * different block group can end up in the same allocation cluster. |
| 3096 | * Calculating the exact overhead in the face of clustered allocation |
| 3097 | * requires either O(all block bitmaps) in memory or O(number of block |
| 3098 | * groups**2) in time. We will still calculate the superblock for |
| 3099 | * older file systems --- and if we come across with a bigalloc file |
| 3100 | * system with zero in s_overhead_clusters the estimate will be close to |
| 3101 | * correct especially for very large cluster sizes --- but for newer |
| 3102 | * file systems, it's better to calculate this figure once at mkfs |
| 3103 | * time, and store it in the superblock. If the superblock value is |
| 3104 | * present (even for non-bigalloc file systems), we will use it. |
| 3105 | */ |
| 3106 | static int count_overhead(struct super_block *sb, ext4_group_t grp, |
| 3107 | char *buf) |
| 3108 | { |
| 3109 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
| 3110 | struct ext4_group_desc *gdp; |
| 3111 | ext4_fsblk_t first_block, last_block, b; |
| 3112 | ext4_group_t i, ngroups = ext4_get_groups_count(sb); |
| 3113 | int s, j, count = 0; |
| 3114 | |
Darrick J. Wong | e2b911c | 2015-10-17 16:18:43 -0400 | [diff] [blame] | 3115 | if (!ext4_has_feature_bigalloc(sb)) |
Theodore Ts'o | 0548bbb | 2012-08-16 11:59:04 -0400 | [diff] [blame] | 3116 | return (ext4_bg_has_super(sb, grp) + ext4_bg_num_gdb(sb, grp) + |
| 3117 | sbi->s_itb_per_group + 2); |
| 3118 | |
Theodore Ts'o | 952fc18 | 2012-07-09 16:27:05 -0400 | [diff] [blame] | 3119 | first_block = le32_to_cpu(sbi->s_es->s_first_data_block) + |
| 3120 | (grp * EXT4_BLOCKS_PER_GROUP(sb)); |
| 3121 | last_block = first_block + EXT4_BLOCKS_PER_GROUP(sb) - 1; |
| 3122 | for (i = 0; i < ngroups; i++) { |
| 3123 | gdp = ext4_get_group_desc(sb, i, NULL); |
| 3124 | b = ext4_block_bitmap(sb, gdp); |
| 3125 | if (b >= first_block && b <= last_block) { |
| 3126 | ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); |
| 3127 | count++; |
| 3128 | } |
| 3129 | b = ext4_inode_bitmap(sb, gdp); |
| 3130 | if (b >= first_block && b <= last_block) { |
| 3131 | ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); |
| 3132 | count++; |
| 3133 | } |
| 3134 | b = ext4_inode_table(sb, gdp); |
| 3135 | if (b >= first_block && b + sbi->s_itb_per_group <= last_block) |
| 3136 | for (j = 0; j < sbi->s_itb_per_group; j++, b++) { |
| 3137 | int c = EXT4_B2C(sbi, b - first_block); |
| 3138 | ext4_set_bit(c, buf); |
| 3139 | count++; |
| 3140 | } |
| 3141 | if (i != grp) |
| 3142 | continue; |
| 3143 | s = 0; |
| 3144 | if (ext4_bg_has_super(sb, grp)) { |
| 3145 | ext4_set_bit(s++, buf); |
| 3146 | count++; |
| 3147 | } |
| 3148 | for (j = ext4_bg_num_gdb(sb, grp); j > 0; j--) { |
| 3149 | ext4_set_bit(EXT4_B2C(sbi, s++), buf); |
| 3150 | count++; |
| 3151 | } |
| 3152 | } |
| 3153 | if (!count) |
| 3154 | return 0; |
| 3155 | return EXT4_CLUSTERS_PER_GROUP(sb) - |
| 3156 | ext4_count_free(buf, EXT4_CLUSTERS_PER_GROUP(sb) / 8); |
| 3157 | } |
| 3158 | |
| 3159 | /* |
| 3160 | * Compute the overhead and stash it in sbi->s_overhead |
| 3161 | */ |
| 3162 | int ext4_calculate_overhead(struct super_block *sb) |
| 3163 | { |
| 3164 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
| 3165 | struct ext4_super_block *es = sbi->s_es; |
| 3166 | ext4_group_t i, ngroups = ext4_get_groups_count(sb); |
| 3167 | ext4_fsblk_t overhead = 0; |
Dmitry Monakhov | 4fdb554 | 2014-11-25 13:08:04 -0500 | [diff] [blame] | 3168 | char *buf = (char *) get_zeroed_page(GFP_NOFS); |
Theodore Ts'o | 952fc18 | 2012-07-09 16:27:05 -0400 | [diff] [blame] | 3169 | |
Theodore Ts'o | 952fc18 | 2012-07-09 16:27:05 -0400 | [diff] [blame] | 3170 | if (!buf) |
| 3171 | return -ENOMEM; |
| 3172 | |
| 3173 | /* |
| 3174 | * Compute the overhead (FS structures). This is constant |
| 3175 | * for a given filesystem unless the number of block groups |
| 3176 | * changes so we cache the previous value until it does. |
| 3177 | */ |
| 3178 | |
| 3179 | /* |
| 3180 | * All of the blocks before first_data_block are overhead |
| 3181 | */ |
| 3182 | overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block)); |
| 3183 | |
| 3184 | /* |
| 3185 | * Add the overhead found in each block group |
| 3186 | */ |
| 3187 | for (i = 0; i < ngroups; i++) { |
| 3188 | int blks; |
| 3189 | |
| 3190 | blks = count_overhead(sb, i, buf); |
| 3191 | overhead += blks; |
| 3192 | if (blks) |
| 3193 | memset(buf, 0, PAGE_SIZE); |
| 3194 | cond_resched(); |
| 3195 | } |
Eric Sandeen | b003b52 | 2014-11-25 16:27:44 -0500 | [diff] [blame] | 3196 | /* Add the internal journal blocks as well */ |
| 3197 | if (sbi->s_journal && !sbi->journal_bdev) |
Lukas Czerner | 810da24 | 2013-03-02 17:18:58 -0500 | [diff] [blame] | 3198 | overhead += EXT4_NUM_B2C(sbi, sbi->s_journal->j_maxlen); |
Eric Sandeen | 0875a2b | 2012-12-25 13:56:01 -0500 | [diff] [blame] | 3199 | |
Theodore Ts'o | 952fc18 | 2012-07-09 16:27:05 -0400 | [diff] [blame] | 3200 | sbi->s_overhead = overhead; |
| 3201 | smp_wmb(); |
| 3202 | free_page((unsigned long) buf); |
| 3203 | return 0; |
| 3204 | } |
| 3205 | |
Theodore Ts'o | b579901 | 2015-09-23 12:44:17 -0400 | [diff] [blame] | 3206 | static void ext4_set_resv_clusters(struct super_block *sb) |
Lukas Czerner | 27dd438 | 2013-04-09 22:11:22 -0400 | [diff] [blame] | 3207 | { |
| 3208 | ext4_fsblk_t resv_clusters; |
Theodore Ts'o | b579901 | 2015-09-23 12:44:17 -0400 | [diff] [blame] | 3209 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
Lukas Czerner | 27dd438 | 2013-04-09 22:11:22 -0400 | [diff] [blame] | 3210 | |
| 3211 | /* |
Jan Kara | 30fac0f | 2013-12-08 21:11:59 -0500 | [diff] [blame] | 3212 | * There's no need to reserve anything when we aren't using extents. |
| 3213 | * The space estimates are exact, there are no unwritten extents, |
| 3214 | * hole punching doesn't need new metadata... This is needed especially |
| 3215 | * to keep ext2/3 backward compatibility. |
| 3216 | */ |
Darrick J. Wong | e2b911c | 2015-10-17 16:18:43 -0400 | [diff] [blame] | 3217 | if (!ext4_has_feature_extents(sb)) |
Theodore Ts'o | b579901 | 2015-09-23 12:44:17 -0400 | [diff] [blame] | 3218 | return; |
Jan Kara | 30fac0f | 2013-12-08 21:11:59 -0500 | [diff] [blame] | 3219 | /* |
Lukas Czerner | 27dd438 | 2013-04-09 22:11:22 -0400 | [diff] [blame] | 3220 | * By default we reserve 2% or 4096 clusters, whichever is smaller. |
| 3221 | * This should cover the situations where we can not afford to run |
| 3222 | * out of space like for example punch hole, or converting |
Lukas Czerner | 556615d | 2014-04-20 23:45:47 -0400 | [diff] [blame] | 3223 | * unwritten extents in delalloc path. In most cases such |
Lukas Czerner | 27dd438 | 2013-04-09 22:11:22 -0400 | [diff] [blame] | 3224 | * allocation would require 1, or 2 blocks, higher numbers are |
| 3225 | * very rare. |
| 3226 | */ |
Theodore Ts'o | b579901 | 2015-09-23 12:44:17 -0400 | [diff] [blame] | 3227 | resv_clusters = (ext4_blocks_count(sbi->s_es) >> |
| 3228 | sbi->s_cluster_bits); |
Lukas Czerner | 27dd438 | 2013-04-09 22:11:22 -0400 | [diff] [blame] | 3229 | |
| 3230 | do_div(resv_clusters, 50); |
| 3231 | resv_clusters = min_t(ext4_fsblk_t, resv_clusters, 4096); |
| 3232 | |
Theodore Ts'o | b579901 | 2015-09-23 12:44:17 -0400 | [diff] [blame] | 3233 | atomic64_set(&sbi->s_resv_clusters, resv_clusters); |
Lukas Czerner | 27dd438 | 2013-04-09 22:11:22 -0400 | [diff] [blame] | 3234 | } |
| 3235 | |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 3236 | 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] | 3237 | { |
Curt Wohlgemuth | d4c402d | 2010-05-16 12:00:00 -0400 | [diff] [blame] | 3238 | char *orig_data = kstrdup(data, GFP_KERNEL); |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 3239 | struct buffer_head *bh; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3240 | struct ext4_super_block *es = NULL; |
| 3241 | struct ext4_sb_info *sbi; |
| 3242 | ext4_fsblk_t block; |
| 3243 | ext4_fsblk_t sb_block = get_sb_block(&data); |
Andrew Morton | 70bbb3e | 2006-10-11 01:21:20 -0700 | [diff] [blame] | 3244 | ext4_fsblk_t logical_sb_block; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3245 | unsigned long offset = 0; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3246 | unsigned long journal_devnum = 0; |
| 3247 | unsigned long def_mount_opts; |
| 3248 | struct inode *root; |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 3249 | const char *descr; |
Cyrill Gorcunov | dcc7dae | 2010-07-27 11:56:07 -0400 | [diff] [blame] | 3250 | int ret = -ENOMEM; |
Theodore Ts'o | 281b599 | 2011-09-09 18:34:51 -0400 | [diff] [blame] | 3251 | int blocksize, clustersize; |
Theodore Ts'o | 4ec1102 | 2009-01-06 14:53:26 -0500 | [diff] [blame] | 3252 | unsigned int db_count; |
| 3253 | unsigned int i; |
Theodore Ts'o | 281b599 | 2011-09-09 18:34:51 -0400 | [diff] [blame] | 3254 | int needs_recovery, has_huge_files, has_bigalloc; |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 3255 | __u64 blocks_count; |
Lukas Czerner | 07aa2ea | 2012-11-08 15:16:54 -0500 | [diff] [blame] | 3256 | int err = 0; |
Theodore Ts'o | b3881f7 | 2009-01-05 22:46:26 -0500 | [diff] [blame] | 3257 | unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 3258 | ext4_group_t first_not_zeroed; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3259 | |
| 3260 | sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); |
| 3261 | if (!sbi) |
Cyrill Gorcunov | dcc7dae | 2010-07-27 11:56:07 -0400 | [diff] [blame] | 3262 | goto out_free_orig; |
Pekka Enberg | 705895b | 2009-02-15 18:07:52 -0500 | [diff] [blame] | 3263 | |
| 3264 | sbi->s_blockgroup_lock = |
| 3265 | kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); |
| 3266 | if (!sbi->s_blockgroup_lock) { |
| 3267 | kfree(sbi); |
Cyrill Gorcunov | dcc7dae | 2010-07-27 11:56:07 -0400 | [diff] [blame] | 3268 | goto out_free_orig; |
Pekka Enberg | 705895b | 2009-02-15 18:07:52 -0500 | [diff] [blame] | 3269 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3270 | sb->s_fs_info = sbi; |
Theodore Ts'o | 2c0544b | 2012-05-30 22:56:46 -0400 | [diff] [blame] | 3271 | sbi->s_sb = sb; |
Theodore Ts'o | 240799c | 2008-10-09 23:53:47 -0400 | [diff] [blame] | 3272 | sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; |
Miklos Szeredi | d9c9bef1 | 2007-10-16 23:26:27 -0700 | [diff] [blame] | 3273 | sbi->s_sb_block = sb_block; |
Theodore Ts'o | f613dfc | 2010-07-27 11:56:08 -0400 | [diff] [blame] | 3274 | if (sb->s_bdev->bd_part) |
| 3275 | sbi->s_sectors_written_start = |
| 3276 | part_stat_read(sb->s_bdev->bd_part, sectors[1]); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3277 | |
Theodore Ts'o | 9f6200b | 2008-09-23 09:18:24 -0400 | [diff] [blame] | 3278 | /* Cleanup superblock name */ |
Rasmus Villemoes | ec3904d | 2015-06-25 15:02:41 -0700 | [diff] [blame] | 3279 | strreplace(sb->s_id, '/', '!'); |
Theodore Ts'o | 9f6200b | 2008-09-23 09:18:24 -0400 | [diff] [blame] | 3280 | |
Lukas Czerner | 07aa2ea | 2012-11-08 15:16:54 -0500 | [diff] [blame] | 3281 | /* -EINVAL is default */ |
Cyrill Gorcunov | dcc7dae | 2010-07-27 11:56:07 -0400 | [diff] [blame] | 3282 | ret = -EINVAL; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3283 | blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3284 | if (!blocksize) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3285 | ext4_msg(sb, KERN_ERR, "unable to set blocksize"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3286 | goto out_fail; |
| 3287 | } |
| 3288 | |
| 3289 | /* |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3290 | * The ext4 superblock will not be buffer aligned for other than 1kB |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3291 | * block sizes. We need to calculate the offset from buffer start. |
| 3292 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3293 | if (blocksize != EXT4_MIN_BLOCK_SIZE) { |
Andrew Morton | 70bbb3e | 2006-10-11 01:21:20 -0700 | [diff] [blame] | 3294 | logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; |
| 3295 | offset = do_div(logical_sb_block, blocksize); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3296 | } else { |
Andrew Morton | 70bbb3e | 2006-10-11 01:21:20 -0700 | [diff] [blame] | 3297 | logical_sb_block = sb_block; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3298 | } |
| 3299 | |
Gioh Kim | a8ac900 | 2014-09-04 22:36:15 -0400 | [diff] [blame] | 3300 | if (!(bh = sb_bread_unmovable(sb, logical_sb_block))) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3301 | ext4_msg(sb, KERN_ERR, "unable to read superblock"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3302 | goto out_fail; |
| 3303 | } |
| 3304 | /* |
| 3305 | * Note: s_es must be initialized as soon as possible because |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3306 | * some ext4 macro-instructions depend on its value |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3307 | */ |
Theodore Ts'o | 2716b80 | 2012-05-28 17:47:52 -0400 | [diff] [blame] | 3308 | es = (struct ext4_super_block *) (bh->b_data + offset); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3309 | sbi->s_es = es; |
| 3310 | sb->s_magic = le16_to_cpu(es->s_magic); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3311 | if (sb->s_magic != EXT4_SUPER_MAGIC) |
| 3312 | goto cantfind_ext4; |
Theodore Ts'o | afc32f7 | 2009-02-28 19:39:58 -0500 | [diff] [blame] | 3313 | sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3314 | |
Darrick J. Wong | feb0ab3 | 2012-04-29 18:45:10 -0400 | [diff] [blame] | 3315 | /* Warn if metadata_csum and gdt_csum are both set. */ |
Darrick J. Wong | e2b911c | 2015-10-17 16:18:43 -0400 | [diff] [blame] | 3316 | if (ext4_has_feature_metadata_csum(sb) && |
| 3317 | ext4_has_feature_gdt_csum(sb)) |
Jakub Wilk | 363307e | 2015-01-02 15:31:14 -0500 | [diff] [blame] | 3318 | ext4_warning(sb, "metadata_csum and uninit_bg are " |
Darrick J. Wong | feb0ab3 | 2012-04-29 18:45:10 -0400 | [diff] [blame] | 3319 | "redundant flags; please run fsck."); |
| 3320 | |
Darrick J. Wong | d25425f | 2012-04-29 18:25:10 -0400 | [diff] [blame] | 3321 | /* Check for a known checksum algorithm */ |
| 3322 | if (!ext4_verify_csum_type(sb, es)) { |
| 3323 | ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " |
| 3324 | "unknown checksum algorithm."); |
| 3325 | silent = 1; |
| 3326 | goto cantfind_ext4; |
| 3327 | } |
| 3328 | |
Darrick J. Wong | 0441984 | 2012-04-29 18:27:10 -0400 | [diff] [blame] | 3329 | /* Load the checksum driver */ |
Darrick J. Wong | e2b911c | 2015-10-17 16:18:43 -0400 | [diff] [blame] | 3330 | if (ext4_has_feature_metadata_csum(sb)) { |
Darrick J. Wong | 0441984 | 2012-04-29 18:27:10 -0400 | [diff] [blame] | 3331 | sbi->s_chksum_driver = crypto_alloc_shash("crc32c", 0, 0); |
| 3332 | if (IS_ERR(sbi->s_chksum_driver)) { |
| 3333 | ext4_msg(sb, KERN_ERR, "Cannot load crc32c driver."); |
| 3334 | ret = PTR_ERR(sbi->s_chksum_driver); |
| 3335 | sbi->s_chksum_driver = NULL; |
| 3336 | goto failed_mount; |
| 3337 | } |
| 3338 | } |
| 3339 | |
Darrick J. Wong | a9c47317 | 2012-04-29 18:29:10 -0400 | [diff] [blame] | 3340 | /* Check superblock checksum */ |
| 3341 | if (!ext4_superblock_csum_verify(sb, es)) { |
| 3342 | ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " |
| 3343 | "invalid superblock checksum. Run e2fsck?"); |
| 3344 | silent = 1; |
Darrick J. Wong | 6a797d2 | 2015-10-17 16:16:04 -0400 | [diff] [blame] | 3345 | ret = -EFSBADCRC; |
Darrick J. Wong | a9c47317 | 2012-04-29 18:29:10 -0400 | [diff] [blame] | 3346 | goto cantfind_ext4; |
| 3347 | } |
| 3348 | |
| 3349 | /* Precompute checksum seed for all metadata */ |
Darrick J. Wong | e2b911c | 2015-10-17 16:18:43 -0400 | [diff] [blame] | 3350 | if (ext4_has_feature_csum_seed(sb)) |
Darrick J. Wong | 8c81bd8 | 2015-10-17 16:16:02 -0400 | [diff] [blame] | 3351 | sbi->s_csum_seed = le32_to_cpu(es->s_checksum_seed); |
| 3352 | else if (ext4_has_metadata_csum(sb)) |
Darrick J. Wong | a9c47317 | 2012-04-29 18:29:10 -0400 | [diff] [blame] | 3353 | sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid, |
| 3354 | sizeof(es->s_uuid)); |
| 3355 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3356 | /* Set defaults before we parse the mount options */ |
| 3357 | def_mount_opts = le32_to_cpu(es->s_default_mount_opts); |
Theodore Ts'o | fd8c37e | 2010-12-15 20:26:48 -0500 | [diff] [blame] | 3358 | set_opt(sb, INIT_INODE_TABLE); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3359 | if (def_mount_opts & EXT4_DEFM_DEBUG) |
Theodore Ts'o | fd8c37e | 2010-12-15 20:26:48 -0500 | [diff] [blame] | 3360 | set_opt(sb, DEBUG); |
Theodore Ts'o | 87f2680 | 2012-03-02 00:03:21 -0500 | [diff] [blame] | 3361 | if (def_mount_opts & EXT4_DEFM_BSDGROUPS) |
Theodore Ts'o | fd8c37e | 2010-12-15 20:26:48 -0500 | [diff] [blame] | 3362 | set_opt(sb, GRPID); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3363 | if (def_mount_opts & EXT4_DEFM_UID16) |
Theodore Ts'o | fd8c37e | 2010-12-15 20:26:48 -0500 | [diff] [blame] | 3364 | set_opt(sb, NO_UID32); |
Eric Sandeen | ea66333 | 2011-02-23 17:51:51 -0500 | [diff] [blame] | 3365 | /* xattr user namespace & acls are now defaulted on */ |
Eric Sandeen | ea66333 | 2011-02-23 17:51:51 -0500 | [diff] [blame] | 3366 | set_opt(sb, XATTR_USER); |
Theodore Ts'o | 03010a3 | 2008-10-10 20:02:48 -0400 | [diff] [blame] | 3367 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
Eric Sandeen | ea66333 | 2011-02-23 17:51:51 -0500 | [diff] [blame] | 3368 | set_opt(sb, POSIX_ACL); |
Hugh Dickins | 2e7842b | 2007-02-10 01:46:13 -0800 | [diff] [blame] | 3369 | #endif |
Darrick J. Wong | 98c1a75 | 2014-10-30 10:53:16 -0400 | [diff] [blame] | 3370 | /* don't forget to enable journal_csum when metadata_csum is enabled. */ |
| 3371 | if (ext4_has_metadata_csum(sb)) |
| 3372 | set_opt(sb, JOURNAL_CHECKSUM); |
| 3373 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3374 | if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) |
Theodore Ts'o | fd8c37e | 2010-12-15 20:26:48 -0500 | [diff] [blame] | 3375 | set_opt(sb, JOURNAL_DATA); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3376 | 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] | 3377 | set_opt(sb, ORDERED_DATA); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3378 | 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] | 3379 | set_opt(sb, WRITEBACK_DATA); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3380 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3381 | 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] | 3382 | set_opt(sb, ERRORS_PANIC); |
Aneesh Kumar K.V | bb4f397 | 2008-01-28 23:58:26 -0500 | [diff] [blame] | 3383 | 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] | 3384 | set_opt(sb, ERRORS_CONT); |
Aneesh Kumar K.V | bb4f397 | 2008-01-28 23:58:26 -0500 | [diff] [blame] | 3385 | else |
Theodore Ts'o | fd8c37e | 2010-12-15 20:26:48 -0500 | [diff] [blame] | 3386 | set_opt(sb, ERRORS_RO); |
Darrick J. Wong | 45f1a9c | 2014-09-01 21:34:09 -0400 | [diff] [blame] | 3387 | /* block_validity enabled by default; disable with noblock_validity */ |
| 3388 | set_opt(sb, BLOCK_VALIDITY); |
Theodore Ts'o | 8b67f04 | 2010-08-01 23:14:20 -0400 | [diff] [blame] | 3389 | if (def_mount_opts & EXT4_DEFM_DISCARD) |
Theodore Ts'o | fd8c37e | 2010-12-15 20:26:48 -0500 | [diff] [blame] | 3390 | set_opt(sb, DISCARD); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3391 | |
Eric W. Biederman | 08cefc7 | 2012-02-07 15:41:49 -0800 | [diff] [blame] | 3392 | sbi->s_resuid = make_kuid(&init_user_ns, le16_to_cpu(es->s_def_resuid)); |
| 3393 | 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] | 3394 | sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; |
| 3395 | sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; |
| 3396 | sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3397 | |
Theodore Ts'o | 8b67f04 | 2010-08-01 23:14:20 -0400 | [diff] [blame] | 3398 | if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) |
Theodore Ts'o | fd8c37e | 2010-12-15 20:26:48 -0500 | [diff] [blame] | 3399 | set_opt(sb, BARRIER); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3400 | |
Mingming Cao | 1e2462f | 2007-07-18 09:00:55 -0400 | [diff] [blame] | 3401 | /* |
Aneesh Kumar K.V | dd919b9 | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 3402 | * enable delayed allocation by default |
| 3403 | * Use -o nodelalloc to turn it off |
| 3404 | */ |
Theodore Ts'o | bc0b75f | 2012-09-17 22:54:36 -0400 | [diff] [blame] | 3405 | if (!IS_EXT3_SB(sb) && !IS_EXT2_SB(sb) && |
Theodore Ts'o | 8b67f04 | 2010-08-01 23:14:20 -0400 | [diff] [blame] | 3406 | ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) |
Theodore Ts'o | fd8c37e | 2010-12-15 20:26:48 -0500 | [diff] [blame] | 3407 | set_opt(sb, DELALLOC); |
Aneesh Kumar K.V | dd919b9 | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 3408 | |
Lukas Czerner | 51ce651 | 2011-05-20 13:55:16 -0400 | [diff] [blame] | 3409 | /* |
| 3410 | * set default s_li_wait_mult for lazyinit, for the case there is |
| 3411 | * no mount option specified. |
| 3412 | */ |
| 3413 | sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; |
| 3414 | |
Theodore Ts'o | 8b67f04 | 2010-08-01 23:14:20 -0400 | [diff] [blame] | 3415 | if (!parse_options((char *) sbi->s_es->s_mount_opts, sb, |
Eric Sandeen | 661aa52 | 2012-02-20 17:53:04 -0500 | [diff] [blame] | 3416 | &journal_devnum, &journal_ioprio, 0)) { |
Theodore Ts'o | 8b67f04 | 2010-08-01 23:14:20 -0400 | [diff] [blame] | 3417 | ext4_msg(sb, KERN_WARNING, |
| 3418 | "failed to parse options in superblock: %s", |
| 3419 | sbi->s_es->s_mount_opts); |
| 3420 | } |
Theodore Ts'o | 5a916be | 2012-03-04 19:27:31 -0500 | [diff] [blame] | 3421 | sbi->s_def_mount_opt = sbi->s_mount_opt; |
Theodore Ts'o | b3881f7 | 2009-01-05 22:46:26 -0500 | [diff] [blame] | 3422 | if (!parse_options((char *) data, sb, &journal_devnum, |
Eric Sandeen | 661aa52 | 2012-02-20 17:53:04 -0500 | [diff] [blame] | 3423 | &journal_ioprio, 0)) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3424 | goto failed_mount; |
| 3425 | |
Theodore Ts'o | 5688978 | 2011-09-03 18:22:38 -0400 | [diff] [blame] | 3426 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { |
| 3427 | printk_once(KERN_WARNING "EXT4-fs: Warning: mounting " |
| 3428 | "with data=journal disables delayed " |
| 3429 | "allocation and O_DIRECT support!\n"); |
| 3430 | if (test_opt2(sb, EXPLICIT_DELALLOC)) { |
| 3431 | ext4_msg(sb, KERN_ERR, "can't mount with " |
| 3432 | "both data=journal and delalloc"); |
| 3433 | goto failed_mount; |
| 3434 | } |
| 3435 | if (test_opt(sb, DIOREAD_NOLOCK)) { |
| 3436 | ext4_msg(sb, KERN_ERR, "can't mount with " |
Piotr Sarna | 6ae6514 | 2013-08-08 23:02:24 -0400 | [diff] [blame] | 3437 | "both data=journal and dioread_nolock"); |
Theodore Ts'o | 5688978 | 2011-09-03 18:22:38 -0400 | [diff] [blame] | 3438 | goto failed_mount; |
| 3439 | } |
Ross Zwisler | 923ae0f | 2015-02-16 15:59:38 -0800 | [diff] [blame] | 3440 | if (test_opt(sb, DAX)) { |
| 3441 | ext4_msg(sb, KERN_ERR, "can't mount with " |
| 3442 | "both data=journal and dax"); |
| 3443 | goto failed_mount; |
| 3444 | } |
Theodore Ts'o | 5688978 | 2011-09-03 18:22:38 -0400 | [diff] [blame] | 3445 | if (test_opt(sb, DELALLOC)) |
| 3446 | clear_opt(sb, DELALLOC); |
Tejun Heo | 001e4a8 | 2015-07-21 23:51:26 -0400 | [diff] [blame] | 3447 | } else { |
| 3448 | sb->s_iflags |= SB_I_CGROUPWB; |
Theodore Ts'o | 5688978 | 2011-09-03 18:22:38 -0400 | [diff] [blame] | 3449 | } |
| 3450 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3451 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | |
Dmitry Monakhov | 482a742 | 2010-02-24 11:35:32 -0500 | [diff] [blame] | 3452 | (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3453 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3454 | if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && |
Darrick J. Wong | e2b911c | 2015-10-17 16:18:43 -0400 | [diff] [blame] | 3455 | (ext4_has_compat_features(sb) || |
| 3456 | ext4_has_ro_compat_features(sb) || |
| 3457 | ext4_has_incompat_features(sb))) |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3458 | ext4_msg(sb, KERN_WARNING, |
| 3459 | "feature flags set on rev 0 fs, " |
| 3460 | "running e2fsck is recommended"); |
Theodore Tso | 469108f | 2008-02-10 01:11:44 -0500 | [diff] [blame] | 3461 | |
Theodore Ts'o | ed3654e | 2014-03-24 14:09:06 -0400 | [diff] [blame] | 3462 | if (es->s_creator_os == cpu_to_le32(EXT4_OS_HURD)) { |
| 3463 | set_opt2(sb, HURD_COMPAT); |
Darrick J. Wong | e2b911c | 2015-10-17 16:18:43 -0400 | [diff] [blame] | 3464 | if (ext4_has_feature_64bit(sb)) { |
Theodore Ts'o | ed3654e | 2014-03-24 14:09:06 -0400 | [diff] [blame] | 3465 | ext4_msg(sb, KERN_ERR, |
| 3466 | "The Hurd can't support 64-bit file systems"); |
| 3467 | goto failed_mount; |
| 3468 | } |
| 3469 | } |
| 3470 | |
Theodore Ts'o | 2035e77 | 2011-04-18 17:29:14 -0400 | [diff] [blame] | 3471 | if (IS_EXT2_SB(sb)) { |
| 3472 | if (ext2_feature_set_ok(sb)) |
| 3473 | ext4_msg(sb, KERN_INFO, "mounting ext2 file system " |
| 3474 | "using the ext4 subsystem"); |
| 3475 | else { |
| 3476 | ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " |
| 3477 | "to feature incompatibilities"); |
| 3478 | goto failed_mount; |
| 3479 | } |
| 3480 | } |
| 3481 | |
| 3482 | if (IS_EXT3_SB(sb)) { |
| 3483 | if (ext3_feature_set_ok(sb)) |
| 3484 | ext4_msg(sb, KERN_INFO, "mounting ext3 file system " |
| 3485 | "using the ext4 subsystem"); |
| 3486 | else { |
| 3487 | ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " |
| 3488 | "to feature incompatibilities"); |
| 3489 | goto failed_mount; |
| 3490 | } |
| 3491 | } |
| 3492 | |
Theodore Tso | 469108f | 2008-02-10 01:11:44 -0500 | [diff] [blame] | 3493 | /* |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3494 | * Check feature flags regardless of the revision level, since we |
| 3495 | * previously didn't change the revision level when setting the flags, |
| 3496 | * so there is a chance incompat flags are set on a rev 0 filesystem. |
| 3497 | */ |
Eric Sandeen | a13fb1a | 2009-08-18 00:20:23 -0400 | [diff] [blame] | 3498 | if (!ext4_feature_set_ok(sb, (sb->s_flags & MS_RDONLY))) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3499 | goto failed_mount; |
Eric Sandeen | a13fb1a | 2009-08-18 00:20:23 -0400 | [diff] [blame] | 3500 | |
Jan Kara | 261cb20c | 2012-12-20 00:07:18 -0500 | [diff] [blame] | 3501 | blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3502 | if (blocksize < EXT4_MIN_BLOCK_SIZE || |
| 3503 | blocksize > EXT4_MAX_BLOCK_SIZE) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3504 | ext4_msg(sb, KERN_ERR, |
| 3505 | "Unsupported filesystem blocksize %d", blocksize); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3506 | goto failed_mount; |
| 3507 | } |
| 3508 | |
Theodore Ts'o | 5b9554d | 2016-07-05 20:01:52 -0400 | [diff] [blame] | 3509 | if (le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) > (blocksize / 4)) { |
| 3510 | ext4_msg(sb, KERN_ERR, |
| 3511 | "Number of reserved GDT blocks insanely large: %d", |
| 3512 | le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks)); |
| 3513 | goto failed_mount; |
| 3514 | } |
| 3515 | |
Ross Zwisler | 923ae0f | 2015-02-16 15:59:38 -0800 | [diff] [blame] | 3516 | if (sbi->s_mount_opt & EXT4_MOUNT_DAX) { |
Toshi Kani | 87eefeb | 2016-05-10 10:23:54 -0600 | [diff] [blame] | 3517 | err = bdev_dax_supported(sb, blocksize); |
| 3518 | if (err) |
Ross Zwisler | 923ae0f | 2015-02-16 15:59:38 -0800 | [diff] [blame] | 3519 | goto failed_mount; |
Ross Zwisler | 923ae0f | 2015-02-16 15:59:38 -0800 | [diff] [blame] | 3520 | } |
| 3521 | |
Darrick J. Wong | e2b911c | 2015-10-17 16:18:43 -0400 | [diff] [blame] | 3522 | if (ext4_has_feature_encrypt(sb) && es->s_encryption_level) { |
Theodore Ts'o | 6ddb244 | 2015-04-16 01:56:00 -0400 | [diff] [blame] | 3523 | ext4_msg(sb, KERN_ERR, "Unsupported encryption level %d", |
| 3524 | es->s_encryption_level); |
| 3525 | goto failed_mount; |
| 3526 | } |
| 3527 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3528 | if (sb->s_blocksize != blocksize) { |
Aneesh Kumar K.V | ce40733 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 3529 | /* Validate the filesystem blocksize */ |
| 3530 | if (!sb_set_blocksize(sb, blocksize)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3531 | ext4_msg(sb, KERN_ERR, "bad block size %d", |
Aneesh Kumar K.V | ce40733 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 3532 | blocksize); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3533 | goto failed_mount; |
| 3534 | } |
| 3535 | |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 3536 | brelse(bh); |
Andrew Morton | 70bbb3e | 2006-10-11 01:21:20 -0700 | [diff] [blame] | 3537 | logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; |
| 3538 | offset = do_div(logical_sb_block, blocksize); |
Gioh Kim | a8ac900 | 2014-09-04 22:36:15 -0400 | [diff] [blame] | 3539 | bh = sb_bread_unmovable(sb, logical_sb_block); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3540 | if (!bh) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3541 | ext4_msg(sb, KERN_ERR, |
| 3542 | "Can't read superblock on 2nd try"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3543 | goto failed_mount; |
| 3544 | } |
Theodore Ts'o | 2716b80 | 2012-05-28 17:47:52 -0400 | [diff] [blame] | 3545 | es = (struct ext4_super_block *)(bh->b_data + offset); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3546 | sbi->s_es = es; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3547 | if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3548 | ext4_msg(sb, KERN_ERR, |
| 3549 | "Magic mismatch, very weird!"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3550 | goto failed_mount; |
| 3551 | } |
| 3552 | } |
| 3553 | |
Darrick J. Wong | e2b911c | 2015-10-17 16:18:43 -0400 | [diff] [blame] | 3554 | has_huge_files = ext4_has_feature_huge_file(sb); |
Theodore Ts'o | f287a1a | 2008-10-16 22:50:48 -0400 | [diff] [blame] | 3555 | sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, |
| 3556 | has_huge_files); |
| 3557 | 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] | 3558 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3559 | if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { |
| 3560 | sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; |
| 3561 | sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3562 | } else { |
| 3563 | sbi->s_inode_size = le16_to_cpu(es->s_inode_size); |
| 3564 | sbi->s_first_ino = le32_to_cpu(es->s_first_ino); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3565 | if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || |
Vignesh Babu | 1330593 | 2007-07-18 09:11:02 -0400 | [diff] [blame] | 3566 | (!is_power_of_2(sbi->s_inode_size)) || |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3567 | (sbi->s_inode_size > blocksize)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3568 | ext4_msg(sb, KERN_ERR, |
| 3569 | "unsupported inode size: %d", |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 3570 | sbi->s_inode_size); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3571 | goto failed_mount; |
| 3572 | } |
Kalpak Shah | ef7f383 | 2007-07-18 09:15:20 -0400 | [diff] [blame] | 3573 | if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) |
| 3574 | sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3575 | } |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 3576 | |
Alexandre Ratchov | 0d1ee42 | 2006-10-11 01:21:14 -0700 | [diff] [blame] | 3577 | sbi->s_desc_size = le16_to_cpu(es->s_desc_size); |
Darrick J. Wong | e2b911c | 2015-10-17 16:18:43 -0400 | [diff] [blame] | 3578 | if (ext4_has_feature_64bit(sb)) { |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 3579 | if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || |
Alexandre Ratchov | 0d1ee42 | 2006-10-11 01:21:14 -0700 | [diff] [blame] | 3580 | sbi->s_desc_size > EXT4_MAX_DESC_SIZE || |
vignesh babu | d8ea6cf | 2007-10-16 23:27:14 -0700 | [diff] [blame] | 3581 | !is_power_of_2(sbi->s_desc_size)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3582 | ext4_msg(sb, KERN_ERR, |
| 3583 | "unsupported descriptor size %lu", |
Alexandre Ratchov | 0d1ee42 | 2006-10-11 01:21:14 -0700 | [diff] [blame] | 3584 | sbi->s_desc_size); |
| 3585 | goto failed_mount; |
| 3586 | } |
| 3587 | } else |
| 3588 | sbi->s_desc_size = EXT4_MIN_DESC_SIZE; |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 3589 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3590 | 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] | 3591 | 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] | 3592 | if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3593 | goto cantfind_ext4; |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 3594 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3595 | sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3596 | if (sbi->s_inodes_per_block == 0) |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3597 | goto cantfind_ext4; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3598 | sbi->s_itb_per_group = sbi->s_inodes_per_group / |
| 3599 | sbi->s_inodes_per_block; |
Alexandre Ratchov | 0d1ee42 | 2006-10-11 01:21:14 -0700 | [diff] [blame] | 3600 | sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3601 | sbi->s_sbh = bh; |
| 3602 | sbi->s_mount_state = le16_to_cpu(es->s_state); |
Fengguang Wu | e57aa83 | 2007-10-16 23:26:25 -0700 | [diff] [blame] | 3603 | sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); |
| 3604 | sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 3605 | |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 3606 | for (i = 0; i < 4; i++) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3607 | sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); |
| 3608 | sbi->s_def_hash_version = es->s_def_hash_version; |
Darrick J. Wong | e2b911c | 2015-10-17 16:18:43 -0400 | [diff] [blame] | 3609 | if (ext4_has_feature_dir_index(sb)) { |
Theodore Ts'o | 2330141 | 2014-02-12 12:16:04 -0500 | [diff] [blame] | 3610 | i = le32_to_cpu(es->s_flags); |
| 3611 | if (i & EXT2_FLAGS_UNSIGNED_HASH) |
| 3612 | sbi->s_hash_unsigned = 3; |
| 3613 | else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { |
Theodore Ts'o | f99b258 | 2008-10-28 13:21:44 -0400 | [diff] [blame] | 3614 | #ifdef __CHAR_UNSIGNED__ |
Theodore Ts'o | 2330141 | 2014-02-12 12:16:04 -0500 | [diff] [blame] | 3615 | if (!(sb->s_flags & MS_RDONLY)) |
| 3616 | es->s_flags |= |
| 3617 | cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); |
| 3618 | sbi->s_hash_unsigned = 3; |
Theodore Ts'o | f99b258 | 2008-10-28 13:21:44 -0400 | [diff] [blame] | 3619 | #else |
Theodore Ts'o | 2330141 | 2014-02-12 12:16:04 -0500 | [diff] [blame] | 3620 | if (!(sb->s_flags & MS_RDONLY)) |
| 3621 | es->s_flags |= |
| 3622 | cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); |
Theodore Ts'o | f99b258 | 2008-10-28 13:21:44 -0400 | [diff] [blame] | 3623 | #endif |
Theodore Ts'o | 2330141 | 2014-02-12 12:16:04 -0500 | [diff] [blame] | 3624 | } |
Theodore Ts'o | f99b258 | 2008-10-28 13:21:44 -0400 | [diff] [blame] | 3625 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3626 | |
Theodore Ts'o | 281b599 | 2011-09-09 18:34:51 -0400 | [diff] [blame] | 3627 | /* Handle clustersize */ |
| 3628 | clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size); |
Darrick J. Wong | e2b911c | 2015-10-17 16:18:43 -0400 | [diff] [blame] | 3629 | has_bigalloc = ext4_has_feature_bigalloc(sb); |
Theodore Ts'o | 281b599 | 2011-09-09 18:34:51 -0400 | [diff] [blame] | 3630 | if (has_bigalloc) { |
| 3631 | if (clustersize < blocksize) { |
| 3632 | ext4_msg(sb, KERN_ERR, |
| 3633 | "cluster size (%d) smaller than " |
| 3634 | "block size (%d)", clustersize, blocksize); |
| 3635 | goto failed_mount; |
| 3636 | } |
| 3637 | sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) - |
| 3638 | le32_to_cpu(es->s_log_block_size); |
| 3639 | sbi->s_clusters_per_group = |
| 3640 | le32_to_cpu(es->s_clusters_per_group); |
| 3641 | if (sbi->s_clusters_per_group > blocksize * 8) { |
| 3642 | ext4_msg(sb, KERN_ERR, |
| 3643 | "#clusters per group too big: %lu", |
| 3644 | sbi->s_clusters_per_group); |
| 3645 | goto failed_mount; |
| 3646 | } |
| 3647 | if (sbi->s_blocks_per_group != |
| 3648 | (sbi->s_clusters_per_group * (clustersize / blocksize))) { |
| 3649 | ext4_msg(sb, KERN_ERR, "blocks per group (%lu) and " |
| 3650 | "clusters per group (%lu) inconsistent", |
| 3651 | sbi->s_blocks_per_group, |
| 3652 | sbi->s_clusters_per_group); |
| 3653 | goto failed_mount; |
| 3654 | } |
| 3655 | } else { |
| 3656 | if (clustersize != blocksize) { |
| 3657 | ext4_warning(sb, "fragment/cluster size (%d) != " |
| 3658 | "block size (%d)", clustersize, |
| 3659 | blocksize); |
| 3660 | clustersize = blocksize; |
| 3661 | } |
| 3662 | if (sbi->s_blocks_per_group > blocksize * 8) { |
| 3663 | ext4_msg(sb, KERN_ERR, |
| 3664 | "#blocks per group too big: %lu", |
| 3665 | sbi->s_blocks_per_group); |
| 3666 | goto failed_mount; |
| 3667 | } |
| 3668 | sbi->s_clusters_per_group = sbi->s_blocks_per_group; |
| 3669 | sbi->s_cluster_bits = 0; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3670 | } |
Theodore Ts'o | 281b599 | 2011-09-09 18:34:51 -0400 | [diff] [blame] | 3671 | sbi->s_cluster_ratio = clustersize / blocksize; |
| 3672 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3673 | if (sbi->s_inodes_per_group > blocksize * 8) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3674 | ext4_msg(sb, KERN_ERR, |
| 3675 | "#inodes per group too big: %lu", |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 3676 | sbi->s_inodes_per_group); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3677 | goto failed_mount; |
| 3678 | } |
| 3679 | |
Theodore Ts'o | 960fd856 | 2013-07-05 23:11:16 -0400 | [diff] [blame] | 3680 | /* Do we have standard group size of clustersize * 8 blocks ? */ |
| 3681 | if (sbi->s_blocks_per_group == clustersize << 3) |
| 3682 | set_opt2(sb, STD_GROUP_SIZE); |
| 3683 | |
Eric Sandeen | bf43d84 | 2009-08-17 23:48:51 -0400 | [diff] [blame] | 3684 | /* |
| 3685 | * Test whether we have more sectors than will fit in sector_t, |
| 3686 | * and whether the max offset is addressable by the page cache. |
| 3687 | */ |
Darrick J. Wong | 5a9ae68 | 2010-11-19 09:56:44 -0500 | [diff] [blame] | 3688 | err = generic_check_addressable(sb->s_blocksize_bits, |
Patrick J. LoPresti | 30ca22c | 2010-07-22 15:03:41 -0700 | [diff] [blame] | 3689 | ext4_blocks_count(es)); |
Darrick J. Wong | 5a9ae68 | 2010-11-19 09:56:44 -0500 | [diff] [blame] | 3690 | if (err) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3691 | ext4_msg(sb, KERN_ERR, "filesystem" |
Eric Sandeen | bf43d84 | 2009-08-17 23:48:51 -0400 | [diff] [blame] | 3692 | " too large to mount safely on this system"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3693 | if (sizeof(sector_t) < 8) |
Bartlomiej Zolnierkiewicz | 90c699a | 2009-06-19 08:08:50 +0200 | [diff] [blame] | 3694 | ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3695 | goto failed_mount; |
| 3696 | } |
| 3697 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3698 | if (EXT4_BLOCKS_PER_GROUP(sb) == 0) |
| 3699 | goto cantfind_ext4; |
Eric Sandeen | e7c9559 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 3700 | |
From: Thiemo Nagel | 0f2ddca | 2009-04-07 14:07:47 -0400 | [diff] [blame] | 3701 | /* check blocks count against device size */ |
| 3702 | blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; |
| 3703 | if (blocks_count && ext4_blocks_count(es) > blocks_count) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3704 | ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " |
| 3705 | "exceeds size of device (%llu blocks)", |
From: Thiemo Nagel | 0f2ddca | 2009-04-07 14:07:47 -0400 | [diff] [blame] | 3706 | ext4_blocks_count(es), blocks_count); |
| 3707 | goto failed_mount; |
| 3708 | } |
| 3709 | |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 3710 | /* |
| 3711 | * It makes no sense for the first data block to be beyond the end |
| 3712 | * of the filesystem. |
| 3713 | */ |
| 3714 | 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] | 3715 | ext4_msg(sb, KERN_WARNING, "bad geometry: first data " |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3716 | "block %u is beyond end of filesystem (%llu)", |
| 3717 | le32_to_cpu(es->s_first_data_block), |
| 3718 | ext4_blocks_count(es)); |
Eric Sandeen | e7c9559 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 3719 | goto failed_mount; |
| 3720 | } |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 3721 | blocks_count = (ext4_blocks_count(es) - |
| 3722 | le32_to_cpu(es->s_first_data_block) + |
| 3723 | EXT4_BLOCKS_PER_GROUP(sb) - 1); |
| 3724 | do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); |
Theodore Ts'o | 4ec1102 | 2009-01-06 14:53:26 -0500 | [diff] [blame] | 3725 | if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3726 | ext4_msg(sb, KERN_WARNING, "groups count too large: %u " |
Theodore Ts'o | 4ec1102 | 2009-01-06 14:53:26 -0500 | [diff] [blame] | 3727 | "(block count %llu, first data block %u, " |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3728 | "blocks per group %lu)", sbi->s_groups_count, |
Theodore Ts'o | 4ec1102 | 2009-01-06 14:53:26 -0500 | [diff] [blame] | 3729 | ext4_blocks_count(es), |
| 3730 | le32_to_cpu(es->s_first_data_block), |
| 3731 | EXT4_BLOCKS_PER_GROUP(sb)); |
| 3732 | goto failed_mount; |
| 3733 | } |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 3734 | sbi->s_groups_count = blocks_count; |
Eric Sandeen | fb0a387 | 2009-09-16 14:45:10 -0400 | [diff] [blame] | 3735 | sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, |
| 3736 | (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3737 | db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / |
| 3738 | EXT4_DESC_PER_BLOCK(sb); |
Theodore Ts'o | f18a5f2 | 2011-08-01 08:45:38 -0400 | [diff] [blame] | 3739 | sbi->s_group_desc = ext4_kvmalloc(db_count * |
| 3740 | sizeof(struct buffer_head *), |
| 3741 | GFP_KERNEL); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3742 | if (sbi->s_group_desc == NULL) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3743 | ext4_msg(sb, KERN_ERR, "not enough memory"); |
Theodore Ts'o | 2cde417 | 2012-05-28 17:49:54 -0400 | [diff] [blame] | 3744 | ret = -ENOMEM; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3745 | goto failed_mount; |
| 3746 | } |
| 3747 | |
Pekka Enberg | 705895b | 2009-02-15 18:07:52 -0500 | [diff] [blame] | 3748 | bgl_lock_init(sbi->s_blockgroup_lock); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3749 | |
| 3750 | for (i = 0; i < db_count; i++) { |
Andrew Morton | 70bbb3e | 2006-10-11 01:21:20 -0700 | [diff] [blame] | 3751 | block = descriptor_loc(sb, logical_sb_block, i); |
Gioh Kim | a8ac900 | 2014-09-04 22:36:15 -0400 | [diff] [blame] | 3752 | sbi->s_group_desc[i] = sb_bread_unmovable(sb, block); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3753 | if (!sbi->s_group_desc[i]) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3754 | ext4_msg(sb, KERN_ERR, |
| 3755 | "can't read group descriptor %d", i); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3756 | db_count = i; |
| 3757 | goto failed_mount2; |
| 3758 | } |
| 3759 | } |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 3760 | if (!ext4_check_descriptors(sb, &first_not_zeroed)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3761 | ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); |
Darrick J. Wong | 6a797d2 | 2015-10-17 16:16:04 -0400 | [diff] [blame] | 3762 | ret = -EFSCORRUPTED; |
Theodore Ts'o | f9ae9cf | 2014-07-11 13:55:40 -0400 | [diff] [blame] | 3763 | goto failed_mount2; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3764 | } |
Jose R. Santos | 772cb7c | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 3765 | |
Theodore Ts'o | f9ae9cf | 2014-07-11 13:55:40 -0400 | [diff] [blame] | 3766 | sbi->s_gdb_count = db_count; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3767 | get_random_bytes(&sbi->s_next_generation, sizeof(u32)); |
| 3768 | spin_lock_init(&sbi->s_next_gen_lock); |
| 3769 | |
Jan Mrazek | 04ecddb | 2015-01-26 14:42:31 -0500 | [diff] [blame] | 3770 | setup_timer(&sbi->s_err_report, print_daily_error_info, |
| 3771 | (unsigned long) sb); |
Tao Ma | 0449641 | 2011-04-05 19:55:28 -0400 | [diff] [blame] | 3772 | |
Dmitry Monakhov | a75ae78f | 2013-04-03 22:10:52 -0400 | [diff] [blame] | 3773 | /* Register extent status tree shrinker */ |
Zheng Liu | eb68d0e | 2014-09-01 22:26:49 -0400 | [diff] [blame] | 3774 | if (ext4_es_register_shrinker(sbi)) |
Theodore Ts'o | ce7e010 | 2010-11-03 12:03:21 -0400 | [diff] [blame] | 3775 | goto failed_mount3; |
Theodore Ts'o | ce7e010 | 2010-11-03 12:03:21 -0400 | [diff] [blame] | 3776 | |
Alex Tomas | c9de560 | 2008-01-29 00:19:52 -0500 | [diff] [blame] | 3777 | sbi->s_stripe = ext4_get_stripe_size(sbi); |
Zheng Liu | 67a5da5 | 2012-08-17 09:54:17 -0400 | [diff] [blame] | 3778 | sbi->s_extent_max_zeroout_kb = 32; |
Alex Tomas | c9de560 | 2008-01-29 00:19:52 -0500 | [diff] [blame] | 3779 | |
Theodore Ts'o | f9ae9cf | 2014-07-11 13:55:40 -0400 | [diff] [blame] | 3780 | /* |
| 3781 | * set up enough so that it can read an inode |
| 3782 | */ |
Theodore Ts'o | f6e63f9 | 2014-09-18 17:12:30 -0400 | [diff] [blame] | 3783 | sb->s_op = &ext4_sops; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3784 | sb->s_export_op = &ext4_export_ops; |
| 3785 | sb->s_xattr = ext4_xattr_handlers; |
Jaegeuk Kim | a7550b3 | 2016-07-10 14:01:03 -0400 | [diff] [blame] | 3786 | sb->s_cop = &ext4_cryptops; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3787 | #ifdef CONFIG_QUOTA |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3788 | sb->dq_op = &ext4_quota_operations; |
Darrick J. Wong | e2b911c | 2015-10-17 16:18:43 -0400 | [diff] [blame] | 3789 | if (ext4_has_feature_quota(sb)) |
Jan Kara | 1fa5efe | 2014-10-08 18:26:54 +0200 | [diff] [blame] | 3790 | sb->s_qcop = &dquot_quotactl_sysfile_ops; |
Jan Kara | 262b466 | 2013-03-02 17:57:08 -0500 | [diff] [blame] | 3791 | else |
| 3792 | sb->s_qcop = &ext4_qctl_operations; |
Li Xi | 689c958 | 2016-01-08 16:01:22 -0500 | [diff] [blame] | 3793 | sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3794 | #endif |
Aneesh Kumar K.V | f2fa2ff | 2011-01-29 18:43:40 +0530 | [diff] [blame] | 3795 | memcpy(sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); |
| 3796 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3797 | INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ |
Theodore Ts'o | 3b9d4ed | 2009-04-25 22:54:04 -0400 | [diff] [blame] | 3798 | mutex_init(&sbi->s_orphan_lock); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3799 | |
| 3800 | sb->s_root = NULL; |
| 3801 | |
| 3802 | needs_recovery = (es->s_last_orphan != 0 || |
Darrick J. Wong | e2b911c | 2015-10-17 16:18:43 -0400 | [diff] [blame] | 3803 | ext4_has_feature_journal_needs_recovery(sb)); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3804 | |
Darrick J. Wong | e2b911c | 2015-10-17 16:18:43 -0400 | [diff] [blame] | 3805 | if (ext4_has_feature_mmp(sb) && !(sb->s_flags & MS_RDONLY)) |
Johann Lombardi | c5e06d1 | 2011-05-24 18:31:25 -0400 | [diff] [blame] | 3806 | 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] | 3807 | goto failed_mount3a; |
Johann Lombardi | c5e06d1 | 2011-05-24 18:31:25 -0400 | [diff] [blame] | 3808 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3809 | /* |
| 3810 | * The first inode we look at is the journal inode. Don't try |
| 3811 | * root first: it may be modified in the journal! |
| 3812 | */ |
Darrick J. Wong | e2b911c | 2015-10-17 16:18:43 -0400 | [diff] [blame] | 3813 | if (!test_opt(sb, NOLOAD) && ext4_has_feature_journal(sb)) { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3814 | if (ext4_load_journal(sb, es, journal_devnum)) |
Darrick J. Wong | 50460fe | 2014-10-30 10:53:16 -0400 | [diff] [blame] | 3815 | goto failed_mount3a; |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 3816 | } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && |
Darrick J. Wong | e2b911c | 2015-10-17 16:18:43 -0400 | [diff] [blame] | 3817 | ext4_has_feature_journal_needs_recovery(sb)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3818 | ext4_msg(sb, KERN_ERR, "required journal recovery " |
| 3819 | "suppressed and not mounted read-only"); |
Jiaying Zhang | 744692d | 2010-03-04 16:14:02 -0500 | [diff] [blame] | 3820 | goto failed_mount_wq; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3821 | } else { |
Dmitry Monakhov | 1e381f6 | 2015-10-18 23:50:26 -0400 | [diff] [blame] | 3822 | /* Nojournal mode, all journal mount options are illegal */ |
| 3823 | if (test_opt2(sb, EXPLICIT_JOURNAL_CHECKSUM)) { |
| 3824 | ext4_msg(sb, KERN_ERR, "can't mount with " |
| 3825 | "journal_checksum, fs mounted w/o journal"); |
| 3826 | goto failed_mount_wq; |
| 3827 | } |
| 3828 | if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { |
| 3829 | ext4_msg(sb, KERN_ERR, "can't mount with " |
| 3830 | "journal_async_commit, fs mounted w/o journal"); |
| 3831 | goto failed_mount_wq; |
| 3832 | } |
| 3833 | if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { |
| 3834 | ext4_msg(sb, KERN_ERR, "can't mount with " |
| 3835 | "commit=%lu, fs mounted w/o journal", |
| 3836 | sbi->s_commit_interval / HZ); |
| 3837 | goto failed_mount_wq; |
| 3838 | } |
| 3839 | if (EXT4_MOUNT_DATA_FLAGS & |
| 3840 | (sbi->s_mount_opt ^ sbi->s_def_mount_opt)) { |
| 3841 | ext4_msg(sb, KERN_ERR, "can't mount with " |
| 3842 | "data=, fs mounted w/o journal"); |
| 3843 | goto failed_mount_wq; |
| 3844 | } |
| 3845 | sbi->s_def_mount_opt &= EXT4_MOUNT_JOURNAL_CHECKSUM; |
| 3846 | clear_opt(sb, JOURNAL_CHECKSUM); |
Theodore Ts'o | fd8c37e | 2010-12-15 20:26:48 -0500 | [diff] [blame] | 3847 | clear_opt(sb, DATA_FLAGS); |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 3848 | sbi->s_journal = NULL; |
| 3849 | needs_recovery = 0; |
| 3850 | goto no_journal; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3851 | } |
| 3852 | |
Darrick J. Wong | e2b911c | 2015-10-17 16:18:43 -0400 | [diff] [blame] | 3853 | if (ext4_has_feature_64bit(sb) && |
Jose R. Santos | eb40a09 | 2007-07-18 08:37:25 -0400 | [diff] [blame] | 3854 | !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, |
| 3855 | JBD2_FEATURE_INCOMPAT_64BIT)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3856 | ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); |
Jiaying Zhang | 744692d | 2010-03-04 16:14:02 -0500 | [diff] [blame] | 3857 | goto failed_mount_wq; |
Jose R. Santos | eb40a09 | 2007-07-18 08:37:25 -0400 | [diff] [blame] | 3858 | } |
| 3859 | |
Darrick J. Wong | 25ed6e8 | 2012-05-27 07:48:56 -0400 | [diff] [blame] | 3860 | if (!set_journal_csum_feature_set(sb)) { |
| 3861 | ext4_msg(sb, KERN_ERR, "Failed to set journal checksum " |
| 3862 | "feature set"); |
| 3863 | goto failed_mount_wq; |
Linus Torvalds | d4da6c9 | 2009-11-02 10:15:27 -0800 | [diff] [blame] | 3864 | } |
Girish Shilamkar | 818d276 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 3865 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3866 | /* We have now updated the journal if required, so we can |
| 3867 | * validate the data journaling mode. */ |
| 3868 | switch (test_opt(sb, DATA_FLAGS)) { |
| 3869 | case 0: |
| 3870 | /* No mode set, assume a default based on the journal |
Andrew Morton | 63f5793 | 2006-10-11 01:21:24 -0700 | [diff] [blame] | 3871 | * capabilities: ORDERED_DATA if the journal can |
| 3872 | * cope, else JOURNAL_DATA |
| 3873 | */ |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 3874 | if (jbd2_journal_check_available_features |
| 3875 | (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) |
Theodore Ts'o | fd8c37e | 2010-12-15 20:26:48 -0500 | [diff] [blame] | 3876 | set_opt(sb, ORDERED_DATA); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3877 | else |
Theodore Ts'o | fd8c37e | 2010-12-15 20:26:48 -0500 | [diff] [blame] | 3878 | set_opt(sb, JOURNAL_DATA); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3879 | break; |
| 3880 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3881 | case EXT4_MOUNT_ORDERED_DATA: |
| 3882 | case EXT4_MOUNT_WRITEBACK_DATA: |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 3883 | if (!jbd2_journal_check_available_features |
| 3884 | (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3885 | ext4_msg(sb, KERN_ERR, "Journal does not support " |
| 3886 | "requested data journaling mode"); |
Jiaying Zhang | 744692d | 2010-03-04 16:14:02 -0500 | [diff] [blame] | 3887 | goto failed_mount_wq; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3888 | } |
| 3889 | default: |
| 3890 | break; |
| 3891 | } |
Theodore Ts'o | b3881f7 | 2009-01-05 22:46:26 -0500 | [diff] [blame] | 3892 | set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3893 | |
Bobi Jam | 18aadd4 | 2012-02-20 17:53:02 -0500 | [diff] [blame] | 3894 | sbi->s_journal->j_commit_callback = ext4_journal_commit_callback; |
| 3895 | |
Theodore Ts'o | ce7e010 | 2010-11-03 12:03:21 -0400 | [diff] [blame] | 3896 | no_journal: |
Andreas Gruenbacher | 2335d05 | 2016-02-22 22:41:05 -0500 | [diff] [blame] | 3897 | sbi->s_mb_cache = ext4_xattr_create_cache(); |
| 3898 | if (!sbi->s_mb_cache) { |
| 3899 | ext4_msg(sb, KERN_ERR, "Failed to create an mb_cache"); |
| 3900 | goto failed_mount_wq; |
T Makphaibulchoke | 9c191f7 | 2014-03-18 19:24:49 -0400 | [diff] [blame] | 3901 | } |
| 3902 | |
Darrick J. Wong | e2b911c | 2015-10-17 16:18:43 -0400 | [diff] [blame] | 3903 | if ((DUMMY_ENCRYPTION_ENABLED(sbi) || ext4_has_feature_encrypt(sb)) && |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 3904 | (blocksize != PAGE_SIZE)) { |
Theodore Ts'o | 1cb767c | 2015-06-12 23:44:33 -0400 | [diff] [blame] | 3905 | ext4_msg(sb, KERN_ERR, |
| 3906 | "Unsupported blocksize for fs encryption"); |
| 3907 | goto failed_mount_wq; |
| 3908 | } |
| 3909 | |
Darrick J. Wong | e2b911c | 2015-10-17 16:18:43 -0400 | [diff] [blame] | 3910 | if (DUMMY_ENCRYPTION_ENABLED(sbi) && !(sb->s_flags & MS_RDONLY) && |
| 3911 | !ext4_has_feature_encrypt(sb)) { |
| 3912 | ext4_set_feature_encrypt(sb); |
Theodore Ts'o | 6ddb244 | 2015-04-16 01:56:00 -0400 | [diff] [blame] | 3913 | ext4_commit_super(sb, 1); |
| 3914 | } |
| 3915 | |
Tejun Heo | fd89d5f | 2011-02-01 11:42:42 +0100 | [diff] [blame] | 3916 | /* |
Theodore Ts'o | 952fc18 | 2012-07-09 16:27:05 -0400 | [diff] [blame] | 3917 | * Get the # of file system overhead blocks from the |
| 3918 | * superblock if present. |
| 3919 | */ |
| 3920 | if (es->s_overhead_clusters) |
| 3921 | sbi->s_overhead = le32_to_cpu(es->s_overhead_clusters); |
| 3922 | else { |
Lukas Czerner | 07aa2ea | 2012-11-08 15:16:54 -0500 | [diff] [blame] | 3923 | err = ext4_calculate_overhead(sb); |
| 3924 | if (err) |
Theodore Ts'o | 952fc18 | 2012-07-09 16:27:05 -0400 | [diff] [blame] | 3925 | goto failed_mount_wq; |
| 3926 | } |
| 3927 | |
| 3928 | /* |
Tejun Heo | fd89d5f | 2011-02-01 11:42:42 +0100 | [diff] [blame] | 3929 | * The maximum number of concurrent works can be high and |
| 3930 | * concurrency isn't really necessary. Limit it to 1. |
| 3931 | */ |
Jan Kara | 2e8fa54 | 2013-06-04 14:21:02 -0400 | [diff] [blame] | 3932 | EXT4_SB(sb)->rsv_conversion_wq = |
| 3933 | alloc_workqueue("ext4-rsv-conversion", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); |
| 3934 | if (!EXT4_SB(sb)->rsv_conversion_wq) { |
| 3935 | printk(KERN_ERR "EXT4-fs: failed to create workqueue\n"); |
Lukas Czerner | 07aa2ea | 2012-11-08 15:16:54 -0500 | [diff] [blame] | 3936 | ret = -ENOMEM; |
Jan Kara | 2e8fa54 | 2013-06-04 14:21:02 -0400 | [diff] [blame] | 3937 | goto failed_mount4; |
| 3938 | } |
| 3939 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3940 | /* |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 3941 | * The jbd2_journal_load will have done any necessary log recovery, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3942 | * so we can safely mount the rest of the filesystem now. |
| 3943 | */ |
| 3944 | |
David Howells | 1d1fe1e | 2008-02-07 00:15:37 -0800 | [diff] [blame] | 3945 | root = ext4_iget(sb, EXT4_ROOT_INO); |
| 3946 | if (IS_ERR(root)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3947 | ext4_msg(sb, KERN_ERR, "get root inode failed"); |
David Howells | 1d1fe1e | 2008-02-07 00:15:37 -0800 | [diff] [blame] | 3948 | ret = PTR_ERR(root); |
Manish Katiyar | 32a9bb5 | 2011-02-27 20:42:06 -0500 | [diff] [blame] | 3949 | root = NULL; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3950 | goto failed_mount4; |
| 3951 | } |
| 3952 | if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3953 | ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); |
Al Viro | 94bf608 | 2012-01-09 15:53:24 -0500 | [diff] [blame] | 3954 | iput(root); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3955 | goto failed_mount4; |
| 3956 | } |
Al Viro | 48fde70 | 2012-01-08 22:15:13 -0500 | [diff] [blame] | 3957 | sb->s_root = d_make_root(root); |
David Howells | 1d1fe1e | 2008-02-07 00:15:37 -0800 | [diff] [blame] | 3958 | if (!sb->s_root) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3959 | ext4_msg(sb, KERN_ERR, "get root dentry failed"); |
David Howells | 1d1fe1e | 2008-02-07 00:15:37 -0800 | [diff] [blame] | 3960 | ret = -ENOMEM; |
| 3961 | goto failed_mount4; |
| 3962 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3963 | |
Eric Sandeen | 7e84b62 | 2012-05-28 14:17:25 -0400 | [diff] [blame] | 3964 | if (ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY)) |
| 3965 | sb->s_flags |= MS_RDONLY; |
Kalpak Shah | ef7f383 | 2007-07-18 09:15:20 -0400 | [diff] [blame] | 3966 | |
| 3967 | /* determine the minimum size of new large inodes, if present */ |
| 3968 | if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { |
| 3969 | sbi->s_want_extra_isize = sizeof(struct ext4_inode) - |
| 3970 | EXT4_GOOD_OLD_INODE_SIZE; |
Darrick J. Wong | e2b911c | 2015-10-17 16:18:43 -0400 | [diff] [blame] | 3971 | if (ext4_has_feature_extra_isize(sb)) { |
Kalpak Shah | ef7f383 | 2007-07-18 09:15:20 -0400 | [diff] [blame] | 3972 | if (sbi->s_want_extra_isize < |
| 3973 | le16_to_cpu(es->s_want_extra_isize)) |
| 3974 | sbi->s_want_extra_isize = |
| 3975 | le16_to_cpu(es->s_want_extra_isize); |
| 3976 | if (sbi->s_want_extra_isize < |
| 3977 | le16_to_cpu(es->s_min_extra_isize)) |
| 3978 | sbi->s_want_extra_isize = |
| 3979 | le16_to_cpu(es->s_min_extra_isize); |
| 3980 | } |
| 3981 | } |
| 3982 | /* Check if enough inode space is available */ |
| 3983 | if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > |
| 3984 | sbi->s_inode_size) { |
| 3985 | sbi->s_want_extra_isize = sizeof(struct ext4_inode) - |
| 3986 | EXT4_GOOD_OLD_INODE_SIZE; |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3987 | ext4_msg(sb, KERN_INFO, "required extra inode space not" |
| 3988 | "available"); |
Kalpak Shah | ef7f383 | 2007-07-18 09:15:20 -0400 | [diff] [blame] | 3989 | } |
| 3990 | |
Theodore Ts'o | b579901 | 2015-09-23 12:44:17 -0400 | [diff] [blame] | 3991 | ext4_set_resv_clusters(sb); |
Lukas Czerner | 27dd438 | 2013-04-09 22:11:22 -0400 | [diff] [blame] | 3992 | |
Theodore Ts'o | 6fd058f | 2009-05-17 15:38:01 -0400 | [diff] [blame] | 3993 | err = ext4_setup_system_zone(sb); |
| 3994 | if (err) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3995 | ext4_msg(sb, KERN_ERR, "failed to initialize system " |
Curt Wohlgemuth | fbe845d | 2010-05-16 13:00:00 -0400 | [diff] [blame] | 3996 | "zone (%d)", err); |
Theodore Ts'o | f9ae9cf | 2014-07-11 13:55:40 -0400 | [diff] [blame] | 3997 | goto failed_mount4a; |
| 3998 | } |
| 3999 | |
| 4000 | ext4_ext_init(sb); |
| 4001 | err = ext4_mb_init(sb); |
| 4002 | if (err) { |
| 4003 | ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", |
| 4004 | err); |
Tao Ma | dcf2d80 | 2011-10-06 12:10:11 -0400 | [diff] [blame] | 4005 | goto failed_mount5; |
Aneesh Kumar K.V | c2774d8 | 2008-10-10 20:07:20 -0400 | [diff] [blame] | 4006 | } |
| 4007 | |
Theodore Ts'o | d5e03cb | 2014-07-15 06:01:38 -0400 | [diff] [blame] | 4008 | block = ext4_count_free_clusters(sb); |
| 4009 | ext4_free_blocks_count_set(sbi->s_es, |
| 4010 | EXT4_C2B(sbi, block)); |
Tejun Heo | 908c7f1 | 2014-09-08 09:51:29 +0900 | [diff] [blame] | 4011 | err = percpu_counter_init(&sbi->s_freeclusters_counter, block, |
| 4012 | GFP_KERNEL); |
Theodore Ts'o | d5e03cb | 2014-07-15 06:01:38 -0400 | [diff] [blame] | 4013 | if (!err) { |
| 4014 | unsigned long freei = ext4_count_free_inodes(sb); |
| 4015 | sbi->s_es->s_free_inodes_count = cpu_to_le32(freei); |
Tejun Heo | 908c7f1 | 2014-09-08 09:51:29 +0900 | [diff] [blame] | 4016 | err = percpu_counter_init(&sbi->s_freeinodes_counter, freei, |
| 4017 | GFP_KERNEL); |
Theodore Ts'o | d5e03cb | 2014-07-15 06:01:38 -0400 | [diff] [blame] | 4018 | } |
| 4019 | if (!err) |
| 4020 | err = percpu_counter_init(&sbi->s_dirs_counter, |
Tejun Heo | 908c7f1 | 2014-09-08 09:51:29 +0900 | [diff] [blame] | 4021 | ext4_count_dirs(sb), GFP_KERNEL); |
Theodore Ts'o | d5e03cb | 2014-07-15 06:01:38 -0400 | [diff] [blame] | 4022 | if (!err) |
Tejun Heo | 908c7f1 | 2014-09-08 09:51:29 +0900 | [diff] [blame] | 4023 | err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0, |
| 4024 | GFP_KERNEL); |
Daeho Jeong | c8585c6 | 2016-04-25 23:22:35 -0400 | [diff] [blame] | 4025 | if (!err) |
| 4026 | err = percpu_init_rwsem(&sbi->s_journal_flag_rwsem); |
| 4027 | |
Theodore Ts'o | d5e03cb | 2014-07-15 06:01:38 -0400 | [diff] [blame] | 4028 | if (err) { |
| 4029 | ext4_msg(sb, KERN_ERR, "insufficient memory"); |
| 4030 | goto failed_mount6; |
| 4031 | } |
| 4032 | |
Darrick J. Wong | e2b911c | 2015-10-17 16:18:43 -0400 | [diff] [blame] | 4033 | if (ext4_has_feature_flex_bg(sb)) |
Theodore Ts'o | d5e03cb | 2014-07-15 06:01:38 -0400 | [diff] [blame] | 4034 | if (!ext4_fill_flex_info(sb)) { |
| 4035 | ext4_msg(sb, KERN_ERR, |
| 4036 | "unable to initialize " |
| 4037 | "flex_bg meta info!"); |
| 4038 | goto failed_mount6; |
| 4039 | } |
| 4040 | |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 4041 | err = ext4_register_li_request(sb, first_not_zeroed); |
| 4042 | if (err) |
Tao Ma | dcf2d80 | 2011-10-06 12:10:11 -0400 | [diff] [blame] | 4043 | goto failed_mount6; |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 4044 | |
Theodore Ts'o | b579901 | 2015-09-23 12:44:17 -0400 | [diff] [blame] | 4045 | err = ext4_register_sysfs(sb); |
Tao Ma | dcf2d80 | 2011-10-06 12:10:11 -0400 | [diff] [blame] | 4046 | if (err) |
| 4047 | goto failed_mount7; |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 4048 | |
Jan Kara | 9b2ff357 | 2013-03-02 18:22:38 -0500 | [diff] [blame] | 4049 | #ifdef CONFIG_QUOTA |
| 4050 | /* Enable quota usage during mount. */ |
Darrick J. Wong | e2b911c | 2015-10-17 16:18:43 -0400 | [diff] [blame] | 4051 | if (ext4_has_feature_quota(sb) && !(sb->s_flags & MS_RDONLY)) { |
Jan Kara | 9b2ff357 | 2013-03-02 18:22:38 -0500 | [diff] [blame] | 4052 | err = ext4_enable_quotas(sb); |
| 4053 | if (err) |
| 4054 | goto failed_mount8; |
| 4055 | } |
| 4056 | #endif /* CONFIG_QUOTA */ |
| 4057 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4058 | EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; |
| 4059 | ext4_orphan_cleanup(sb, es); |
| 4060 | EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 4061 | if (needs_recovery) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 4062 | ext4_msg(sb, KERN_INFO, "recovery complete"); |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 4063 | ext4_mark_recovery_complete(sb, es); |
| 4064 | } |
| 4065 | if (EXT4_SB(sb)->s_journal) { |
| 4066 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) |
| 4067 | descr = " journalled data mode"; |
| 4068 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) |
| 4069 | descr = " ordered data mode"; |
| 4070 | else |
| 4071 | descr = " writeback data mode"; |
| 4072 | } else |
| 4073 | descr = "out journal"; |
| 4074 | |
Lukas Czerner | 79add3a | 2012-11-08 13:28:29 -0500 | [diff] [blame] | 4075 | if (test_opt(sb, DISCARD)) { |
| 4076 | struct request_queue *q = bdev_get_queue(sb->s_bdev); |
| 4077 | if (!blk_queue_discard(q)) |
| 4078 | ext4_msg(sb, KERN_WARNING, |
| 4079 | "mounting with \"discard\" option, but " |
| 4080 | "the device does not support discard"); |
| 4081 | } |
| 4082 | |
Theodore Ts'o | e294a53 | 2015-08-15 14:59:44 -0400 | [diff] [blame] | 4083 | if (___ratelimit(&ext4_mount_msg_ratelimit, "EXT4-fs mount")) |
| 4084 | ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " |
| 4085 | "Opts: %s%s%s", descr, sbi->s_es->s_mount_opts, |
| 4086 | *sbi->s_es->s_mount_opts ? "; " : "", orig_data); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4087 | |
Theodore Ts'o | 66e61a9 | 2010-07-27 11:56:04 -0400 | [diff] [blame] | 4088 | if (es->s_error_count) |
| 4089 | mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4090 | |
Theodore Ts'o | efbed4d | 2013-10-17 21:11:01 -0400 | [diff] [blame] | 4091 | /* Enable message ratelimiting. Default is 10 messages per 5 secs. */ |
| 4092 | ratelimit_state_init(&sbi->s_err_ratelimit_state, 5 * HZ, 10); |
| 4093 | ratelimit_state_init(&sbi->s_warning_ratelimit_state, 5 * HZ, 10); |
| 4094 | ratelimit_state_init(&sbi->s_msg_ratelimit_state, 5 * HZ, 10); |
| 4095 | |
Curt Wohlgemuth | d4c402d | 2010-05-16 12:00:00 -0400 | [diff] [blame] | 4096 | kfree(orig_data); |
Jaegeuk Kim | a7550b3 | 2016-07-10 14:01:03 -0400 | [diff] [blame] | 4097 | #ifdef CONFIG_EXT4_FS_ENCRYPTION |
| 4098 | memcpy(sbi->key_prefix, EXT4_KEY_DESC_PREFIX, |
| 4099 | EXT4_KEY_DESC_PREFIX_SIZE); |
| 4100 | sbi->key_prefix_size = EXT4_KEY_DESC_PREFIX_SIZE; |
| 4101 | #endif |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4102 | return 0; |
| 4103 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4104 | cantfind_ext4: |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4105 | if (!silent) |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 4106 | ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4107 | goto failed_mount; |
| 4108 | |
Theodore Ts'o | 72ba745 | 2013-01-24 23:24:54 -0500 | [diff] [blame] | 4109 | #ifdef CONFIG_QUOTA |
| 4110 | failed_mount8: |
Theodore Ts'o | ebd173b | 2015-09-23 12:46:17 -0400 | [diff] [blame] | 4111 | ext4_unregister_sysfs(sb); |
Theodore Ts'o | 72ba745 | 2013-01-24 23:24:54 -0500 | [diff] [blame] | 4112 | #endif |
Tao Ma | dcf2d80 | 2011-10-06 12:10:11 -0400 | [diff] [blame] | 4113 | failed_mount7: |
| 4114 | ext4_unregister_li_request(sb); |
| 4115 | failed_mount6: |
Theodore Ts'o | f9ae9cf | 2014-07-11 13:55:40 -0400 | [diff] [blame] | 4116 | ext4_mb_release(sb); |
Theodore Ts'o | d5e03cb | 2014-07-15 06:01:38 -0400 | [diff] [blame] | 4117 | if (sbi->s_flex_groups) |
Al Viro | b93b41d | 2014-11-20 12:19:11 -0500 | [diff] [blame] | 4118 | kvfree(sbi->s_flex_groups); |
Theodore Ts'o | d5e03cb | 2014-07-15 06:01:38 -0400 | [diff] [blame] | 4119 | percpu_counter_destroy(&sbi->s_freeclusters_counter); |
| 4120 | percpu_counter_destroy(&sbi->s_freeinodes_counter); |
| 4121 | percpu_counter_destroy(&sbi->s_dirs_counter); |
| 4122 | percpu_counter_destroy(&sbi->s_dirtyclusters_counter); |
Azat Khuzhin | 0076493 | 2014-04-07 10:54:20 -0400 | [diff] [blame] | 4123 | failed_mount5: |
Theodore Ts'o | f9ae9cf | 2014-07-11 13:55:40 -0400 | [diff] [blame] | 4124 | ext4_ext_release(sb); |
| 4125 | ext4_release_system_zone(sb); |
| 4126 | failed_mount4a: |
Al Viro | 94bf608 | 2012-01-09 15:53:24 -0500 | [diff] [blame] | 4127 | dput(sb->s_root); |
Manish Katiyar | 32a9bb5 | 2011-02-27 20:42:06 -0500 | [diff] [blame] | 4128 | sb->s_root = NULL; |
Al Viro | 94bf608 | 2012-01-09 15:53:24 -0500 | [diff] [blame] | 4129 | failed_mount4: |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 4130 | ext4_msg(sb, KERN_ERR, "mount failed"); |
Jan Kara | 2e8fa54 | 2013-06-04 14:21:02 -0400 | [diff] [blame] | 4131 | if (EXT4_SB(sb)->rsv_conversion_wq) |
| 4132 | destroy_workqueue(EXT4_SB(sb)->rsv_conversion_wq); |
Mingming Cao | 4c0425f | 2009-09-28 15:48:41 -0400 | [diff] [blame] | 4133 | failed_mount_wq: |
Jan Kara | 82939d7 | 2016-02-22 11:50:13 -0500 | [diff] [blame] | 4134 | if (sbi->s_mb_cache) { |
| 4135 | ext4_xattr_destroy_cache(sbi->s_mb_cache); |
| 4136 | sbi->s_mb_cache = NULL; |
| 4137 | } |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 4138 | if (sbi->s_journal) { |
| 4139 | jbd2_journal_destroy(sbi->s_journal); |
| 4140 | sbi->s_journal = NULL; |
| 4141 | } |
Darrick J. Wong | 50460fe | 2014-10-30 10:53:16 -0400 | [diff] [blame] | 4142 | failed_mount3a: |
Zheng Liu | d3922a7 | 2013-07-01 08:12:37 -0400 | [diff] [blame] | 4143 | ext4_es_unregister_shrinker(sbi); |
Zheng Liu | eb68d0e | 2014-09-01 22:26:49 -0400 | [diff] [blame] | 4144 | failed_mount3: |
Al Viro | 9105bb1 | 2013-12-08 20:52:31 -0500 | [diff] [blame] | 4145 | del_timer_sync(&sbi->s_err_report); |
Johann Lombardi | c5e06d1 | 2011-05-24 18:31:25 -0400 | [diff] [blame] | 4146 | if (sbi->s_mmp_tsk) |
| 4147 | kthread_stop(sbi->s_mmp_tsk); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4148 | failed_mount2: |
| 4149 | for (i = 0; i < db_count; i++) |
| 4150 | brelse(sbi->s_group_desc[i]); |
Al Viro | b93b41d | 2014-11-20 12:19:11 -0500 | [diff] [blame] | 4151 | kvfree(sbi->s_group_desc); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4152 | failed_mount: |
Darrick J. Wong | 0441984 | 2012-04-29 18:27:10 -0400 | [diff] [blame] | 4153 | if (sbi->s_chksum_driver) |
| 4154 | crypto_free_shash(sbi->s_chksum_driver); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4155 | #ifdef CONFIG_QUOTA |
Jan Kara | a2d4a64 | 2014-09-11 11:15:15 -0400 | [diff] [blame] | 4156 | for (i = 0; i < EXT4_MAXQUOTAS; i++) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4157 | kfree(sbi->s_qf_names[i]); |
| 4158 | #endif |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4159 | ext4_blkdev_remove(sbi); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4160 | brelse(bh); |
| 4161 | out_fail: |
| 4162 | sb->s_fs_info = NULL; |
Manish Katiyar | f683016 | 2009-05-17 23:52:44 -0400 | [diff] [blame] | 4163 | kfree(sbi->s_blockgroup_lock); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4164 | kfree(sbi); |
Cyrill Gorcunov | dcc7dae | 2010-07-27 11:56:07 -0400 | [diff] [blame] | 4165 | out_free_orig: |
Curt Wohlgemuth | d4c402d | 2010-05-16 12:00:00 -0400 | [diff] [blame] | 4166 | kfree(orig_data); |
Lukas Czerner | 07aa2ea | 2012-11-08 15:16:54 -0500 | [diff] [blame] | 4167 | return err ? err : ret; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4168 | } |
| 4169 | |
| 4170 | /* |
| 4171 | * Setup any per-fs journal parameters now. We'll do this both on |
| 4172 | * initial mount, once the journal has been initialised but before we've |
| 4173 | * done any recovery; and again on any subsequent remount. |
| 4174 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4175 | 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] | 4176 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4177 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4178 | |
Theodore Ts'o | 3077384 | 2009-01-03 20:27:38 -0500 | [diff] [blame] | 4179 | journal->j_commit_interval = sbi->s_commit_interval; |
| 4180 | journal->j_min_batch_time = sbi->s_min_batch_time; |
| 4181 | journal->j_max_batch_time = sbi->s_max_batch_time; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4182 | |
Theodore Ts'o | a931da6 | 2010-08-03 21:35:12 -0400 | [diff] [blame] | 4183 | write_lock(&journal->j_state_lock); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4184 | if (test_opt(sb, BARRIER)) |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 4185 | journal->j_flags |= JBD2_BARRIER; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4186 | else |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 4187 | journal->j_flags &= ~JBD2_BARRIER; |
Hidehiro Kawai | 5bf5683 | 2008-10-10 22:12:43 -0400 | [diff] [blame] | 4188 | if (test_opt(sb, DATA_ERR_ABORT)) |
| 4189 | journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; |
| 4190 | else |
| 4191 | journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; |
Theodore Ts'o | a931da6 | 2010-08-03 21:35:12 -0400 | [diff] [blame] | 4192 | write_unlock(&journal->j_state_lock); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4193 | } |
| 4194 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4195 | static journal_t *ext4_get_journal(struct super_block *sb, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4196 | unsigned int journal_inum) |
| 4197 | { |
| 4198 | struct inode *journal_inode; |
| 4199 | journal_t *journal; |
| 4200 | |
Darrick J. Wong | e2b911c | 2015-10-17 16:18:43 -0400 | [diff] [blame] | 4201 | BUG_ON(!ext4_has_feature_journal(sb)); |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 4202 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4203 | /* First, test for the existence of a valid inode on disk. Bad |
| 4204 | * things happen if we iget() an unused inode, as the subsequent |
| 4205 | * iput() will try to delete it. */ |
| 4206 | |
David Howells | 1d1fe1e | 2008-02-07 00:15:37 -0800 | [diff] [blame] | 4207 | journal_inode = ext4_iget(sb, journal_inum); |
| 4208 | if (IS_ERR(journal_inode)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 4209 | ext4_msg(sb, KERN_ERR, "no journal found"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4210 | return NULL; |
| 4211 | } |
| 4212 | if (!journal_inode->i_nlink) { |
| 4213 | make_bad_inode(journal_inode); |
| 4214 | iput(journal_inode); |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 4215 | ext4_msg(sb, KERN_ERR, "journal inode is deleted"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4216 | return NULL; |
| 4217 | } |
| 4218 | |
Theodore Ts'o | e5f8eab8 | 2008-09-08 22:25:04 -0400 | [diff] [blame] | 4219 | jbd_debug(2, "Journal inode found at %p: %lld bytes\n", |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4220 | journal_inode, journal_inode->i_size); |
David Howells | 1d1fe1e | 2008-02-07 00:15:37 -0800 | [diff] [blame] | 4221 | if (!S_ISREG(journal_inode->i_mode)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 4222 | ext4_msg(sb, KERN_ERR, "invalid journal inode"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4223 | iput(journal_inode); |
| 4224 | return NULL; |
| 4225 | } |
| 4226 | |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 4227 | journal = jbd2_journal_init_inode(journal_inode); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4228 | if (!journal) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 4229 | ext4_msg(sb, KERN_ERR, "Could not load journal inode"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4230 | iput(journal_inode); |
| 4231 | return NULL; |
| 4232 | } |
| 4233 | journal->j_private = sb; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4234 | ext4_init_journal_params(sb, journal); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4235 | return journal; |
| 4236 | } |
| 4237 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4238 | static journal_t *ext4_get_dev_journal(struct super_block *sb, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4239 | dev_t j_dev) |
| 4240 | { |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 4241 | struct buffer_head *bh; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4242 | journal_t *journal; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4243 | ext4_fsblk_t start; |
| 4244 | ext4_fsblk_t len; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4245 | int hblock, blocksize; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4246 | ext4_fsblk_t sb_block; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4247 | unsigned long offset; |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 4248 | struct ext4_super_block *es; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4249 | struct block_device *bdev; |
| 4250 | |
Darrick J. Wong | e2b911c | 2015-10-17 16:18:43 -0400 | [diff] [blame] | 4251 | BUG_ON(!ext4_has_feature_journal(sb)); |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 4252 | |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 4253 | bdev = ext4_blkdev_get(j_dev, sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4254 | if (bdev == NULL) |
| 4255 | return NULL; |
| 4256 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4257 | blocksize = sb->s_blocksize; |
Martin K. Petersen | e1defc4 | 2009-05-22 17:17:49 -0400 | [diff] [blame] | 4258 | hblock = bdev_logical_block_size(bdev); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4259 | if (blocksize < hblock) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 4260 | ext4_msg(sb, KERN_ERR, |
| 4261 | "blocksize too small for journal device"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4262 | goto out_bdev; |
| 4263 | } |
| 4264 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4265 | sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; |
| 4266 | offset = EXT4_MIN_BLOCK_SIZE % blocksize; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4267 | set_blocksize(bdev, blocksize); |
| 4268 | if (!(bh = __bread(bdev, sb_block, blocksize))) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 4269 | ext4_msg(sb, KERN_ERR, "couldn't read superblock of " |
| 4270 | "external journal"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4271 | goto out_bdev; |
| 4272 | } |
| 4273 | |
Theodore Ts'o | 2716b80 | 2012-05-28 17:47:52 -0400 | [diff] [blame] | 4274 | es = (struct ext4_super_block *) (bh->b_data + offset); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4275 | if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4276 | !(le32_to_cpu(es->s_feature_incompat) & |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4277 | EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 4278 | ext4_msg(sb, KERN_ERR, "external journal has " |
| 4279 | "bad superblock"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4280 | brelse(bh); |
| 4281 | goto out_bdev; |
| 4282 | } |
| 4283 | |
Darrick J. Wong | df4763b | 2014-09-11 11:44:36 -0400 | [diff] [blame] | 4284 | if ((le32_to_cpu(es->s_feature_ro_compat) & |
| 4285 | EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && |
| 4286 | es->s_checksum != ext4_superblock_csum(sb, es)) { |
| 4287 | ext4_msg(sb, KERN_ERR, "external journal has " |
| 4288 | "corrupt superblock"); |
| 4289 | brelse(bh); |
| 4290 | goto out_bdev; |
| 4291 | } |
| 4292 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4293 | 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] | 4294 | ext4_msg(sb, KERN_ERR, "journal UUID does not match"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4295 | brelse(bh); |
| 4296 | goto out_bdev; |
| 4297 | } |
| 4298 | |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 4299 | len = ext4_blocks_count(es); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4300 | start = sb_block + 1; |
| 4301 | brelse(bh); /* we're done with the superblock */ |
| 4302 | |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 4303 | journal = jbd2_journal_init_dev(bdev, sb->s_bdev, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4304 | start, len, blocksize); |
| 4305 | if (!journal) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 4306 | ext4_msg(sb, KERN_ERR, "failed to create device journal"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4307 | goto out_bdev; |
| 4308 | } |
| 4309 | journal->j_private = sb; |
Mike Christie | dfec8a1 | 2016-06-05 14:31:44 -0500 | [diff] [blame] | 4310 | ll_rw_block(REQ_OP_READ, REQ_META | REQ_PRIO, 1, &journal->j_sb_buffer); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4311 | wait_on_buffer(journal->j_sb_buffer); |
| 4312 | if (!buffer_uptodate(journal->j_sb_buffer)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 4313 | ext4_msg(sb, KERN_ERR, "I/O error on journal device"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4314 | goto out_journal; |
| 4315 | } |
| 4316 | if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 4317 | ext4_msg(sb, KERN_ERR, "External journal has more than one " |
| 4318 | "user (unsupported) - %d", |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4319 | be32_to_cpu(journal->j_superblock->s_nr_users)); |
| 4320 | goto out_journal; |
| 4321 | } |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4322 | EXT4_SB(sb)->journal_bdev = bdev; |
| 4323 | ext4_init_journal_params(sb, journal); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4324 | return journal; |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 4325 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4326 | out_journal: |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 4327 | jbd2_journal_destroy(journal); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4328 | out_bdev: |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4329 | ext4_blkdev_put(bdev); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4330 | return NULL; |
| 4331 | } |
| 4332 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4333 | static int ext4_load_journal(struct super_block *sb, |
| 4334 | struct ext4_super_block *es, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4335 | unsigned long journal_devnum) |
| 4336 | { |
| 4337 | journal_t *journal; |
| 4338 | unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); |
| 4339 | dev_t journal_dev; |
| 4340 | int err = 0; |
| 4341 | int really_read_only; |
| 4342 | |
Darrick J. Wong | e2b911c | 2015-10-17 16:18:43 -0400 | [diff] [blame] | 4343 | BUG_ON(!ext4_has_feature_journal(sb)); |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 4344 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4345 | if (journal_devnum && |
| 4346 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 4347 | ext4_msg(sb, KERN_INFO, "external journal device major/minor " |
| 4348 | "numbers have changed"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4349 | journal_dev = new_decode_dev(journal_devnum); |
| 4350 | } else |
| 4351 | journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); |
| 4352 | |
| 4353 | really_read_only = bdev_read_only(sb->s_bdev); |
| 4354 | |
| 4355 | /* |
| 4356 | * Are we loading a blank journal or performing recovery after a |
| 4357 | * crash? For recovery, we need to check in advance whether we |
| 4358 | * can get read-write access to the device. |
| 4359 | */ |
Darrick J. Wong | e2b911c | 2015-10-17 16:18:43 -0400 | [diff] [blame] | 4360 | if (ext4_has_feature_journal_needs_recovery(sb)) { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4361 | if (sb->s_flags & MS_RDONLY) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 4362 | ext4_msg(sb, KERN_INFO, "INFO: recovery " |
| 4363 | "required on readonly filesystem"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4364 | if (really_read_only) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 4365 | ext4_msg(sb, KERN_ERR, "write access " |
| 4366 | "unavailable, cannot proceed"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4367 | return -EROFS; |
| 4368 | } |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 4369 | ext4_msg(sb, KERN_INFO, "write access will " |
| 4370 | "be enabled during recovery"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4371 | } |
| 4372 | } |
| 4373 | |
| 4374 | if (journal_inum && journal_dev) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 4375 | ext4_msg(sb, KERN_ERR, "filesystem has both journal " |
| 4376 | "and inode journals!"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4377 | return -EINVAL; |
| 4378 | } |
| 4379 | |
| 4380 | if (journal_inum) { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4381 | if (!(journal = ext4_get_journal(sb, journal_inum))) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4382 | return -EINVAL; |
| 4383 | } else { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4384 | if (!(journal = ext4_get_dev_journal(sb, journal_dev))) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4385 | return -EINVAL; |
| 4386 | } |
| 4387 | |
Theodore Ts'o | 90576c0 | 2009-09-29 15:51:30 -0400 | [diff] [blame] | 4388 | if (!(journal->j_flags & JBD2_BARRIER)) |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 4389 | ext4_msg(sb, KERN_INFO, "barriers disabled"); |
Theodore Ts'o | 4776004f | 2008-09-08 23:00:52 -0400 | [diff] [blame] | 4390 | |
Darrick J. Wong | e2b911c | 2015-10-17 16:18:43 -0400 | [diff] [blame] | 4391 | if (!ext4_has_feature_journal_needs_recovery(sb)) |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 4392 | err = jbd2_journal_wipe(journal, !really_read_only); |
Theodore Ts'o | 1c13d5c | 2010-07-27 11:56:03 -0400 | [diff] [blame] | 4393 | if (!err) { |
| 4394 | char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); |
| 4395 | if (save) |
| 4396 | memcpy(save, ((char *) es) + |
| 4397 | EXT4_S_ERR_START, EXT4_S_ERR_LEN); |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 4398 | err = jbd2_journal_load(journal); |
Theodore Ts'o | 1c13d5c | 2010-07-27 11:56:03 -0400 | [diff] [blame] | 4399 | if (save) |
| 4400 | memcpy(((char *) es) + EXT4_S_ERR_START, |
| 4401 | save, EXT4_S_ERR_LEN); |
| 4402 | kfree(save); |
| 4403 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4404 | |
| 4405 | if (err) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 4406 | ext4_msg(sb, KERN_ERR, "error loading journal"); |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 4407 | jbd2_journal_destroy(journal); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4408 | return err; |
| 4409 | } |
| 4410 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4411 | EXT4_SB(sb)->s_journal = journal; |
| 4412 | ext4_clear_journal_err(sb, es); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4413 | |
Maciej Żenczykowski | c41303c | 2010-10-27 21:30:06 -0400 | [diff] [blame] | 4414 | if (!really_read_only && journal_devnum && |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4415 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { |
| 4416 | es->s_journal_dev = cpu_to_le32(journal_devnum); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4417 | |
| 4418 | /* Make sure we flush the recovery flag to disk. */ |
Theodore Ts'o | e2d6705 | 2009-05-01 00:33:44 -0400 | [diff] [blame] | 4419 | ext4_commit_super(sb, 1); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4420 | } |
| 4421 | |
| 4422 | return 0; |
| 4423 | } |
| 4424 | |
Theodore Ts'o | e2d6705 | 2009-05-01 00:33:44 -0400 | [diff] [blame] | 4425 | static int ext4_commit_super(struct super_block *sb, int sync) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4426 | { |
Theodore Ts'o | e2d6705 | 2009-05-01 00:33:44 -0400 | [diff] [blame] | 4427 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4428 | struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; |
Takashi Sato | c4be0c1 | 2009-01-09 16:40:58 -0800 | [diff] [blame] | 4429 | int error = 0; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4430 | |
Theodore Ts'o | bdfe0cbd | 2015-08-16 10:03:57 -0400 | [diff] [blame] | 4431 | if (!sbh || block_device_ejected(sb)) |
Takashi Sato | c4be0c1 | 2009-01-09 16:40:58 -0800 | [diff] [blame] | 4432 | return error; |
Theodore Ts'o | 71290b3 | 2009-09-10 17:31:04 -0400 | [diff] [blame] | 4433 | /* |
| 4434 | * If the file system is mounted read-only, don't update the |
| 4435 | * superblock write time. This avoids updating the superblock |
| 4436 | * write time when we are mounting the root file system |
| 4437 | * read/only but we need to replay the journal; at that point, |
| 4438 | * for people who are east of GMT and who make their clock |
| 4439 | * tick in localtime for Windows bug-for-bug compatibility, |
| 4440 | * the clock is set in the future, and this will cause e2fsck |
| 4441 | * to complain and force a full file system check. |
| 4442 | */ |
| 4443 | if (!(sb->s_flags & MS_RDONLY)) |
| 4444 | es->s_wtime = cpu_to_le32(get_seconds()); |
Theodore Ts'o | f613dfc | 2010-07-27 11:56:08 -0400 | [diff] [blame] | 4445 | if (sb->s_bdev->bd_part) |
| 4446 | es->s_kbytes_written = |
| 4447 | cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + |
Theodore Ts'o | afc32f7 | 2009-02-28 19:39:58 -0500 | [diff] [blame] | 4448 | ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - |
| 4449 | EXT4_SB(sb)->s_sectors_written_start) >> 1)); |
Theodore Ts'o | f613dfc | 2010-07-27 11:56:08 -0400 | [diff] [blame] | 4450 | else |
| 4451 | es->s_kbytes_written = |
| 4452 | cpu_to_le64(EXT4_SB(sb)->s_kbytes_written); |
Theodore Ts'o | d5e03cb | 2014-07-15 06:01:38 -0400 | [diff] [blame] | 4453 | if (percpu_counter_initialized(&EXT4_SB(sb)->s_freeclusters_counter)) |
| 4454 | ext4_free_blocks_count_set(es, |
Theodore Ts'o | 5704265 | 2011-09-09 18:56:51 -0400 | [diff] [blame] | 4455 | EXT4_C2B(EXT4_SB(sb), percpu_counter_sum_positive( |
| 4456 | &EXT4_SB(sb)->s_freeclusters_counter))); |
Theodore Ts'o | d5e03cb | 2014-07-15 06:01:38 -0400 | [diff] [blame] | 4457 | if (percpu_counter_initialized(&EXT4_SB(sb)->s_freeinodes_counter)) |
| 4458 | es->s_free_inodes_count = |
| 4459 | cpu_to_le32(percpu_counter_sum_positive( |
Theodore Ts'o | ce7e010 | 2010-11-03 12:03:21 -0400 | [diff] [blame] | 4460 | &EXT4_SB(sb)->s_freeinodes_counter)); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4461 | BUFFER_TRACE(sbh, "marking dirty"); |
Theodore Ts'o | 06db49e | 2012-10-10 01:06:58 -0400 | [diff] [blame] | 4462 | ext4_superblock_csum_set(sb); |
Pranay Kr. Srivastava | 4743f83 | 2016-07-04 10:24:52 -0400 | [diff] [blame] | 4463 | lock_buffer(sbh); |
| 4464 | if (buffer_write_io_error(sbh)) { |
| 4465 | /* |
| 4466 | * Oh, dear. A previous attempt to write the |
| 4467 | * superblock failed. This could happen because the |
| 4468 | * USB device was yanked out. Or it could happen to |
| 4469 | * be a transient write error and maybe the block will |
| 4470 | * be remapped. Nothing we can do but to retry the |
| 4471 | * write and hope for the best. |
| 4472 | */ |
| 4473 | ext4_msg(sb, KERN_ERR, "previous I/O error to " |
| 4474 | "superblock detected"); |
| 4475 | clear_buffer_write_io_error(sbh); |
| 4476 | set_buffer_uptodate(sbh); |
| 4477 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4478 | mark_buffer_dirty(sbh); |
Pranay Kr. Srivastava | 4743f83 | 2016-07-04 10:24:52 -0400 | [diff] [blame] | 4479 | unlock_buffer(sbh); |
Theodore Ts'o | 914258b | 2008-10-06 21:35:40 -0400 | [diff] [blame] | 4480 | if (sync) { |
Daeho Jeong | 564bc40 | 2015-07-23 09:46:11 -0400 | [diff] [blame] | 4481 | error = __sync_dirty_buffer(sbh, |
| 4482 | test_opt(sb, BARRIER) ? WRITE_FUA : WRITE_SYNC); |
Takashi Sato | c4be0c1 | 2009-01-09 16:40:58 -0800 | [diff] [blame] | 4483 | if (error) |
| 4484 | return error; |
| 4485 | |
| 4486 | error = buffer_write_io_error(sbh); |
| 4487 | if (error) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 4488 | ext4_msg(sb, KERN_ERR, "I/O error while writing " |
| 4489 | "superblock"); |
Theodore Ts'o | 914258b | 2008-10-06 21:35:40 -0400 | [diff] [blame] | 4490 | clear_buffer_write_io_error(sbh); |
| 4491 | set_buffer_uptodate(sbh); |
| 4492 | } |
| 4493 | } |
Takashi Sato | c4be0c1 | 2009-01-09 16:40:58 -0800 | [diff] [blame] | 4494 | return error; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4495 | } |
| 4496 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4497 | /* |
| 4498 | * Have we just finished recovery? If so, and if we are mounting (or |
| 4499 | * remounting) the filesystem readonly, then we will end up with a |
| 4500 | * consistent fs on disk. Record that fact. |
| 4501 | */ |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 4502 | static void ext4_mark_recovery_complete(struct super_block *sb, |
| 4503 | struct ext4_super_block *es) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4504 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4505 | journal_t *journal = EXT4_SB(sb)->s_journal; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4506 | |
Darrick J. Wong | e2b911c | 2015-10-17 16:18:43 -0400 | [diff] [blame] | 4507 | if (!ext4_has_feature_journal(sb)) { |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 4508 | BUG_ON(journal != NULL); |
| 4509 | return; |
| 4510 | } |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 4511 | jbd2_journal_lock_updates(journal); |
Hidehiro Kawai | 7ffe1ea | 2008-10-10 20:29:21 -0400 | [diff] [blame] | 4512 | if (jbd2_journal_flush(journal) < 0) |
| 4513 | goto out; |
| 4514 | |
Darrick J. Wong | e2b911c | 2015-10-17 16:18:43 -0400 | [diff] [blame] | 4515 | if (ext4_has_feature_journal_needs_recovery(sb) && |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4516 | sb->s_flags & MS_RDONLY) { |
Darrick J. Wong | e2b911c | 2015-10-17 16:18:43 -0400 | [diff] [blame] | 4517 | ext4_clear_feature_journal_needs_recovery(sb); |
Theodore Ts'o | e2d6705 | 2009-05-01 00:33:44 -0400 | [diff] [blame] | 4518 | ext4_commit_super(sb, 1); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4519 | } |
Hidehiro Kawai | 7ffe1ea | 2008-10-10 20:29:21 -0400 | [diff] [blame] | 4520 | |
| 4521 | out: |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 4522 | jbd2_journal_unlock_updates(journal); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4523 | } |
| 4524 | |
| 4525 | /* |
| 4526 | * If we are mounting (or read-write remounting) a filesystem whose journal |
| 4527 | * has recorded an error from a previous lifetime, move that error to the |
| 4528 | * main filesystem now. |
| 4529 | */ |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 4530 | static void ext4_clear_journal_err(struct super_block *sb, |
| 4531 | struct ext4_super_block *es) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4532 | { |
| 4533 | journal_t *journal; |
| 4534 | int j_errno; |
| 4535 | const char *errstr; |
| 4536 | |
Darrick J. Wong | e2b911c | 2015-10-17 16:18:43 -0400 | [diff] [blame] | 4537 | BUG_ON(!ext4_has_feature_journal(sb)); |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 4538 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4539 | journal = EXT4_SB(sb)->s_journal; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4540 | |
| 4541 | /* |
| 4542 | * 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] | 4543 | * journal by a prior ext4_error() or ext4_abort() |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4544 | */ |
| 4545 | |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 4546 | j_errno = jbd2_journal_errno(journal); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4547 | if (j_errno) { |
| 4548 | char nbuf[16]; |
| 4549 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4550 | errstr = ext4_decode_error(sb, j_errno, nbuf); |
Eric Sandeen | 12062dd | 2010-02-15 14:19:27 -0500 | [diff] [blame] | 4551 | ext4_warning(sb, "Filesystem error recorded " |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4552 | "from previous mount: %s", errstr); |
Eric Sandeen | 12062dd | 2010-02-15 14:19:27 -0500 | [diff] [blame] | 4553 | ext4_warning(sb, "Marking fs in need of filesystem check."); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4554 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4555 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; |
| 4556 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); |
Theodore Ts'o | e2d6705 | 2009-05-01 00:33:44 -0400 | [diff] [blame] | 4557 | ext4_commit_super(sb, 1); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4558 | |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 4559 | jbd2_journal_clear_err(journal); |
Theodore Ts'o | d796c52 | 2012-08-05 19:04:57 -0400 | [diff] [blame] | 4560 | jbd2_journal_update_sb_errno(journal); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4561 | } |
| 4562 | } |
| 4563 | |
| 4564 | /* |
| 4565 | * Force the running and committing transactions to commit, |
| 4566 | * and wait on the commit. |
| 4567 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4568 | int ext4_force_commit(struct super_block *sb) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4569 | { |
| 4570 | journal_t *journal; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4571 | |
| 4572 | if (sb->s_flags & MS_RDONLY) |
| 4573 | return 0; |
| 4574 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4575 | journal = EXT4_SB(sb)->s_journal; |
Guo Chao | b1deefc | 2013-01-28 21:41:02 -0500 | [diff] [blame] | 4576 | return ext4_journal_force_commit(journal); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4577 | } |
| 4578 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4579 | static int ext4_sync_fs(struct super_block *sb, int wait) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4580 | { |
Theodore Ts'o | 14ce0cb | 2008-11-03 18:10:55 -0500 | [diff] [blame] | 4581 | int ret = 0; |
Jan Kara | 9eddacf | 2009-02-10 06:46:05 -0500 | [diff] [blame] | 4582 | tid_t target; |
Dmitry Monakhov | 06a407f | 2013-06-12 22:25:07 -0400 | [diff] [blame] | 4583 | bool needs_barrier = false; |
Mingming Cao | 8d5d02e | 2009-09-28 15:48:29 -0400 | [diff] [blame] | 4584 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4585 | |
Theodore Ts'o | 9bffad1 | 2009-06-17 11:48:11 -0400 | [diff] [blame] | 4586 | trace_ext4_sync_fs(sb, wait); |
Jan Kara | 2e8fa54 | 2013-06-04 14:21:02 -0400 | [diff] [blame] | 4587 | flush_workqueue(sbi->rsv_conversion_wq); |
Jan Kara | a117782 | 2012-07-03 16:45:29 +0200 | [diff] [blame] | 4588 | /* |
| 4589 | * Writeback quota in non-journalled quota case - journalled quota has |
| 4590 | * no dirty dquots |
| 4591 | */ |
| 4592 | dquot_writeback_dquots(sb, -1); |
Dmitry Monakhov | 06a407f | 2013-06-12 22:25:07 -0400 | [diff] [blame] | 4593 | /* |
| 4594 | * Data writeback is possible w/o journal transaction, so barrier must |
| 4595 | * being sent at the end of the function. But we can skip it if |
| 4596 | * transaction_commit will do it for us. |
| 4597 | */ |
Theodore Ts'o | bda3253 | 2014-09-18 16:12:37 -0400 | [diff] [blame] | 4598 | if (sbi->s_journal) { |
| 4599 | target = jbd2_get_latest_transaction(sbi->s_journal); |
| 4600 | if (wait && sbi->s_journal->j_flags & JBD2_BARRIER && |
| 4601 | !jbd2_trans_will_send_data_barrier(sbi->s_journal, target)) |
| 4602 | needs_barrier = true; |
Dmitry Monakhov | 06a407f | 2013-06-12 22:25:07 -0400 | [diff] [blame] | 4603 | |
Theodore Ts'o | bda3253 | 2014-09-18 16:12:37 -0400 | [diff] [blame] | 4604 | if (jbd2_journal_start_commit(sbi->s_journal, &target)) { |
| 4605 | if (wait) |
| 4606 | ret = jbd2_log_wait_commit(sbi->s_journal, |
| 4607 | target); |
| 4608 | } |
| 4609 | } else if (wait && test_opt(sb, BARRIER)) |
| 4610 | needs_barrier = true; |
Dmitry Monakhov | 06a407f | 2013-06-12 22:25:07 -0400 | [diff] [blame] | 4611 | if (needs_barrier) { |
| 4612 | int err; |
| 4613 | err = blkdev_issue_flush(sb->s_bdev, GFP_KERNEL, NULL); |
| 4614 | if (!ret) |
| 4615 | ret = err; |
| 4616 | } |
| 4617 | |
| 4618 | return ret; |
| 4619 | } |
| 4620 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4621 | /* |
| 4622 | * LVM calls this function before a (read-only) snapshot is created. This |
| 4623 | * 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] | 4624 | * |
| 4625 | * 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] | 4626 | * state independently. It relies on upper layer to stop all data & metadata |
| 4627 | * modifications. |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4628 | */ |
Takashi Sato | c4be0c1 | 2009-01-09 16:40:58 -0800 | [diff] [blame] | 4629 | static int ext4_freeze(struct super_block *sb) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4630 | { |
Takashi Sato | c4be0c1 | 2009-01-09 16:40:58 -0800 | [diff] [blame] | 4631 | int error = 0; |
| 4632 | journal_t *journal; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4633 | |
Theodore Ts'o | 9ca9238 | 2009-05-01 12:52:25 -0400 | [diff] [blame] | 4634 | if (sb->s_flags & MS_RDONLY) |
| 4635 | return 0; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4636 | |
Theodore Ts'o | 9ca9238 | 2009-05-01 12:52:25 -0400 | [diff] [blame] | 4637 | journal = EXT4_SB(sb)->s_journal; |
Hidehiro Kawai | 7ffe1ea | 2008-10-10 20:29:21 -0400 | [diff] [blame] | 4638 | |
Theodore Ts'o | bb04457 | 2014-09-18 17:12:02 -0400 | [diff] [blame] | 4639 | if (journal) { |
| 4640 | /* Now we set up the journal barrier. */ |
| 4641 | jbd2_journal_lock_updates(journal); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4642 | |
Theodore Ts'o | bb04457 | 2014-09-18 17:12:02 -0400 | [diff] [blame] | 4643 | /* |
| 4644 | * Don't clear the needs_recovery flag if we failed to |
| 4645 | * flush the journal. |
| 4646 | */ |
| 4647 | error = jbd2_journal_flush(journal); |
| 4648 | if (error < 0) |
| 4649 | goto out; |
Eric Sandeen | c642dc9 | 2015-08-15 10:45:06 -0400 | [diff] [blame] | 4650 | |
| 4651 | /* Journal blocked and flushed, clear needs_recovery flag. */ |
Darrick J. Wong | e2b911c | 2015-10-17 16:18:43 -0400 | [diff] [blame] | 4652 | ext4_clear_feature_journal_needs_recovery(sb); |
Theodore Ts'o | bb04457 | 2014-09-18 17:12:02 -0400 | [diff] [blame] | 4653 | } |
Theodore Ts'o | 9ca9238 | 2009-05-01 12:52:25 -0400 | [diff] [blame] | 4654 | |
Theodore Ts'o | 9ca9238 | 2009-05-01 12:52:25 -0400 | [diff] [blame] | 4655 | error = ext4_commit_super(sb, 1); |
Eric Sandeen | 6b0310f | 2010-05-16 02:00:00 -0400 | [diff] [blame] | 4656 | out: |
Theodore Ts'o | bb04457 | 2014-09-18 17:12:02 -0400 | [diff] [blame] | 4657 | if (journal) |
| 4658 | /* we rely on upper layer to stop further updates */ |
| 4659 | jbd2_journal_unlock_updates(journal); |
Eric Sandeen | 6b0310f | 2010-05-16 02:00:00 -0400 | [diff] [blame] | 4660 | return error; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4661 | } |
| 4662 | |
| 4663 | /* |
| 4664 | * Called by LVM after the snapshot is done. We need to reset the RECOVER |
| 4665 | * flag here, even though the filesystem is not technically dirty yet. |
| 4666 | */ |
Takashi Sato | c4be0c1 | 2009-01-09 16:40:58 -0800 | [diff] [blame] | 4667 | static int ext4_unfreeze(struct super_block *sb) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4668 | { |
Theodore Ts'o | 9ca9238 | 2009-05-01 12:52:25 -0400 | [diff] [blame] | 4669 | if (sb->s_flags & MS_RDONLY) |
| 4670 | return 0; |
| 4671 | |
Eric Sandeen | c642dc9 | 2015-08-15 10:45:06 -0400 | [diff] [blame] | 4672 | if (EXT4_SB(sb)->s_journal) { |
| 4673 | /* Reset the needs_recovery flag before the fs is unlocked. */ |
Darrick J. Wong | e2b911c | 2015-10-17 16:18:43 -0400 | [diff] [blame] | 4674 | ext4_set_feature_journal_needs_recovery(sb); |
Eric Sandeen | c642dc9 | 2015-08-15 10:45:06 -0400 | [diff] [blame] | 4675 | } |
| 4676 | |
Theodore Ts'o | 9ca9238 | 2009-05-01 12:52:25 -0400 | [diff] [blame] | 4677 | ext4_commit_super(sb, 1); |
Takashi Sato | c4be0c1 | 2009-01-09 16:40:58 -0800 | [diff] [blame] | 4678 | return 0; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4679 | } |
| 4680 | |
Theodore Ts'o | 673c610 | 2010-12-15 20:28:48 -0500 | [diff] [blame] | 4681 | /* |
| 4682 | * Structure to save mount options for ext4_remount's benefit |
| 4683 | */ |
| 4684 | struct ext4_mount_options { |
| 4685 | unsigned long s_mount_opt; |
Theodore Ts'o | a2595b8 | 2010-12-15 20:30:48 -0500 | [diff] [blame] | 4686 | unsigned long s_mount_opt2; |
Eric W. Biederman | 08cefc7 | 2012-02-07 15:41:49 -0800 | [diff] [blame] | 4687 | kuid_t s_resuid; |
| 4688 | kgid_t s_resgid; |
Theodore Ts'o | 673c610 | 2010-12-15 20:28:48 -0500 | [diff] [blame] | 4689 | unsigned long s_commit_interval; |
| 4690 | u32 s_min_batch_time, s_max_batch_time; |
| 4691 | #ifdef CONFIG_QUOTA |
| 4692 | int s_jquota_fmt; |
Jan Kara | a2d4a64 | 2014-09-11 11:15:15 -0400 | [diff] [blame] | 4693 | char *s_qf_names[EXT4_MAXQUOTAS]; |
Theodore Ts'o | 673c610 | 2010-12-15 20:28:48 -0500 | [diff] [blame] | 4694 | #endif |
| 4695 | }; |
| 4696 | |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 4697 | static int ext4_remount(struct super_block *sb, int *flags, char *data) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4698 | { |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 4699 | struct ext4_super_block *es; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4700 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4701 | unsigned long old_sb_flags; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4702 | struct ext4_mount_options old_opts; |
Christoph Hellwig | c79d967 | 2010-05-19 07:16:40 -0400 | [diff] [blame] | 4703 | int enable_quota = 0; |
Theodore Ts'o | 8a26646 | 2008-07-26 14:34:21 -0400 | [diff] [blame] | 4704 | ext4_group_t g; |
Theodore Ts'o | b3881f7 | 2009-01-05 22:46:26 -0500 | [diff] [blame] | 4705 | unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; |
Johann Lombardi | c5e06d1 | 2011-05-24 18:31:25 -0400 | [diff] [blame] | 4706 | int err = 0; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4707 | #ifdef CONFIG_QUOTA |
Chen Gang | 03dafb5 | 2013-01-24 23:24:58 -0500 | [diff] [blame] | 4708 | int i, j; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4709 | #endif |
Curt Wohlgemuth | d4c402d | 2010-05-16 12:00:00 -0400 | [diff] [blame] | 4710 | char *orig_data = kstrdup(data, GFP_KERNEL); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4711 | |
| 4712 | /* Store the original options */ |
| 4713 | old_sb_flags = sb->s_flags; |
| 4714 | old_opts.s_mount_opt = sbi->s_mount_opt; |
Theodore Ts'o | a2595b8 | 2010-12-15 20:30:48 -0500 | [diff] [blame] | 4715 | old_opts.s_mount_opt2 = sbi->s_mount_opt2; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4716 | old_opts.s_resuid = sbi->s_resuid; |
| 4717 | old_opts.s_resgid = sbi->s_resgid; |
| 4718 | old_opts.s_commit_interval = sbi->s_commit_interval; |
Theodore Ts'o | 3077384 | 2009-01-03 20:27:38 -0500 | [diff] [blame] | 4719 | old_opts.s_min_batch_time = sbi->s_min_batch_time; |
| 4720 | old_opts.s_max_batch_time = sbi->s_max_batch_time; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4721 | #ifdef CONFIG_QUOTA |
| 4722 | old_opts.s_jquota_fmt = sbi->s_jquota_fmt; |
Jan Kara | a2d4a64 | 2014-09-11 11:15:15 -0400 | [diff] [blame] | 4723 | for (i = 0; i < EXT4_MAXQUOTAS; i++) |
Chen Gang | 03dafb5 | 2013-01-24 23:24:58 -0500 | [diff] [blame] | 4724 | if (sbi->s_qf_names[i]) { |
| 4725 | old_opts.s_qf_names[i] = kstrdup(sbi->s_qf_names[i], |
| 4726 | GFP_KERNEL); |
| 4727 | if (!old_opts.s_qf_names[i]) { |
| 4728 | for (j = 0; j < i; j++) |
| 4729 | kfree(old_opts.s_qf_names[j]); |
Wei Yongjun | 3e36a16 | 2013-03-02 17:13:55 -0500 | [diff] [blame] | 4730 | kfree(orig_data); |
Chen Gang | 03dafb5 | 2013-01-24 23:24:58 -0500 | [diff] [blame] | 4731 | return -ENOMEM; |
| 4732 | } |
| 4733 | } else |
| 4734 | old_opts.s_qf_names[i] = NULL; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4735 | #endif |
Theodore Ts'o | b3881f7 | 2009-01-05 22:46:26 -0500 | [diff] [blame] | 4736 | if (sbi->s_journal && sbi->s_journal->j_task->io_context) |
| 4737 | journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4738 | |
Eric Sandeen | 661aa52 | 2012-02-20 17:53:04 -0500 | [diff] [blame] | 4739 | if (!parse_options(data, sb, NULL, &journal_ioprio, 1)) { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4740 | err = -EINVAL; |
| 4741 | goto restore_opts; |
| 4742 | } |
| 4743 | |
Darrick J. Wong | 6b992ff | 2014-10-30 10:53:16 -0400 | [diff] [blame] | 4744 | if ((old_opts.s_mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) ^ |
| 4745 | test_opt(sb, JOURNAL_CHECKSUM)) { |
| 4746 | ext4_msg(sb, KERN_ERR, "changing journal_checksum " |
Eric Sandeen | 2d5b86e | 2015-02-12 23:07:37 -0500 | [diff] [blame] | 4747 | "during remount not supported; ignoring"); |
| 4748 | sbi->s_mount_opt ^= EXT4_MOUNT_JOURNAL_CHECKSUM; |
Darrick J. Wong | c6d3d56 | 2014-11-25 16:20:50 -0500 | [diff] [blame] | 4749 | } |
| 4750 | |
Piotr Sarna | 6ae6514 | 2013-08-08 23:02:24 -0400 | [diff] [blame] | 4751 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { |
| 4752 | if (test_opt2(sb, EXPLICIT_DELALLOC)) { |
| 4753 | ext4_msg(sb, KERN_ERR, "can't mount with " |
| 4754 | "both data=journal and delalloc"); |
| 4755 | err = -EINVAL; |
| 4756 | goto restore_opts; |
| 4757 | } |
| 4758 | if (test_opt(sb, DIOREAD_NOLOCK)) { |
| 4759 | ext4_msg(sb, KERN_ERR, "can't mount with " |
| 4760 | "both data=journal and dioread_nolock"); |
| 4761 | err = -EINVAL; |
| 4762 | goto restore_opts; |
| 4763 | } |
Ross Zwisler | 923ae0f | 2015-02-16 15:59:38 -0800 | [diff] [blame] | 4764 | if (test_opt(sb, DAX)) { |
| 4765 | ext4_msg(sb, KERN_ERR, "can't mount with " |
| 4766 | "both data=journal and dax"); |
| 4767 | err = -EINVAL; |
| 4768 | goto restore_opts; |
| 4769 | } |
| 4770 | } |
| 4771 | |
| 4772 | if ((sbi->s_mount_opt ^ old_opts.s_mount_opt) & EXT4_MOUNT_DAX) { |
| 4773 | ext4_msg(sb, KERN_WARNING, "warning: refusing change of " |
| 4774 | "dax flag with busy inodes while remounting"); |
| 4775 | sbi->s_mount_opt ^= EXT4_MOUNT_DAX; |
Piotr Sarna | 6ae6514 | 2013-08-08 23:02:24 -0400 | [diff] [blame] | 4776 | } |
| 4777 | |
Theodore Ts'o | 4ab2f15 | 2009-06-13 10:09:36 -0400 | [diff] [blame] | 4778 | if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) |
Theodore Ts'o | c67d859 | 2010-06-29 11:07:07 -0400 | [diff] [blame] | 4779 | ext4_abort(sb, "Abort forced by user"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4780 | |
| 4781 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | |
Dmitry Monakhov | 482a742 | 2010-02-24 11:35:32 -0500 | [diff] [blame] | 4782 | (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4783 | |
| 4784 | es = sbi->s_es; |
| 4785 | |
Theodore Ts'o | b3881f7 | 2009-01-05 22:46:26 -0500 | [diff] [blame] | 4786 | if (sbi->s_journal) { |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 4787 | ext4_init_journal_params(sb, sbi->s_journal); |
Theodore Ts'o | b3881f7 | 2009-01-05 22:46:26 -0500 | [diff] [blame] | 4788 | set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); |
| 4789 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4790 | |
Theodore Ts'o | a2fd66d | 2015-06-23 11:03:54 -0400 | [diff] [blame] | 4791 | if (*flags & MS_LAZYTIME) |
| 4792 | sb->s_flags |= MS_LAZYTIME; |
| 4793 | |
Eric Sandeen | 661aa52 | 2012-02-20 17:53:04 -0500 | [diff] [blame] | 4794 | if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) { |
Theodore Ts'o | 4ab2f15 | 2009-06-13 10:09:36 -0400 | [diff] [blame] | 4795 | if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4796 | err = -EROFS; |
| 4797 | goto restore_opts; |
| 4798 | } |
| 4799 | |
| 4800 | if (*flags & MS_RDONLY) { |
Theodore Ts'o | 38c03b3 | 2014-03-13 22:49:42 -0400 | [diff] [blame] | 4801 | err = sync_filesystem(sb); |
| 4802 | if (err < 0) |
| 4803 | goto restore_opts; |
Christoph Hellwig | 0f0dd62 | 2010-05-19 07:16:41 -0400 | [diff] [blame] | 4804 | err = dquot_suspend(sb, -1); |
| 4805 | if (err < 0) |
Christoph Hellwig | c79d967 | 2010-05-19 07:16:40 -0400 | [diff] [blame] | 4806 | goto restore_opts; |
Christoph Hellwig | c79d967 | 2010-05-19 07:16:40 -0400 | [diff] [blame] | 4807 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4808 | /* |
| 4809 | * First of all, the unconditional stuff we have to do |
| 4810 | * to disable replay of the journal when we next remount |
| 4811 | */ |
| 4812 | sb->s_flags |= MS_RDONLY; |
| 4813 | |
| 4814 | /* |
| 4815 | * OK, test if we are remounting a valid rw partition |
| 4816 | * readonly, and if so set the rdonly flag and then |
| 4817 | * mark the partition as valid again. |
| 4818 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4819 | if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && |
| 4820 | (sbi->s_mount_state & EXT4_VALID_FS)) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4821 | es->s_state = cpu_to_le16(sbi->s_mount_state); |
| 4822 | |
Theodore Ts'o | a63c9eb | 2009-05-01 01:59:42 -0400 | [diff] [blame] | 4823 | if (sbi->s_journal) |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 4824 | ext4_mark_recovery_complete(sb, es); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4825 | } else { |
Eric Sandeen | a13fb1a | 2009-08-18 00:20:23 -0400 | [diff] [blame] | 4826 | /* Make sure we can mount this feature set readwrite */ |
Darrick J. Wong | e2b911c | 2015-10-17 16:18:43 -0400 | [diff] [blame] | 4827 | if (ext4_has_feature_readonly(sb) || |
Darrick J. Wong | 2cb5cc8 | 2015-02-12 22:31:21 -0500 | [diff] [blame] | 4828 | !ext4_feature_set_ok(sb, 0)) { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4829 | err = -EROFS; |
| 4830 | goto restore_opts; |
| 4831 | } |
Eric Sandeen | ead6596 | 2007-02-10 01:46:08 -0800 | [diff] [blame] | 4832 | /* |
Theodore Ts'o | 8a26646 | 2008-07-26 14:34:21 -0400 | [diff] [blame] | 4833 | * Make sure the group descriptor checksums |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 4834 | * are sane. If they aren't, refuse to remount r/w. |
Theodore Ts'o | 8a26646 | 2008-07-26 14:34:21 -0400 | [diff] [blame] | 4835 | */ |
| 4836 | for (g = 0; g < sbi->s_groups_count; g++) { |
| 4837 | struct ext4_group_desc *gdp = |
| 4838 | ext4_get_group_desc(sb, g, NULL); |
| 4839 | |
Darrick J. Wong | feb0ab3 | 2012-04-29 18:45:10 -0400 | [diff] [blame] | 4840 | if (!ext4_group_desc_csum_verify(sb, g, gdp)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 4841 | ext4_msg(sb, KERN_ERR, |
| 4842 | "ext4_remount: Checksum for group %u failed (%u!=%u)", |
Darrick J. Wong | e2b911c | 2015-10-17 16:18:43 -0400 | [diff] [blame] | 4843 | g, le16_to_cpu(ext4_group_desc_csum(sb, g, gdp)), |
Theodore Ts'o | 8a26646 | 2008-07-26 14:34:21 -0400 | [diff] [blame] | 4844 | le16_to_cpu(gdp->bg_checksum)); |
Darrick J. Wong | 6a797d2 | 2015-10-17 16:16:04 -0400 | [diff] [blame] | 4845 | err = -EFSBADCRC; |
Theodore Ts'o | 8a26646 | 2008-07-26 14:34:21 -0400 | [diff] [blame] | 4846 | goto restore_opts; |
| 4847 | } |
| 4848 | } |
| 4849 | |
| 4850 | /* |
Eric Sandeen | ead6596 | 2007-02-10 01:46:08 -0800 | [diff] [blame] | 4851 | * If we have an unprocessed orphan list hanging |
| 4852 | * around from a previously readonly bdev mount, |
| 4853 | * require a full umount/remount for now. |
| 4854 | */ |
| 4855 | if (es->s_last_orphan) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 4856 | ext4_msg(sb, KERN_WARNING, "Couldn't " |
Eric Sandeen | ead6596 | 2007-02-10 01:46:08 -0800 | [diff] [blame] | 4857 | "remount RDWR because of unprocessed " |
| 4858 | "orphan inode list. Please " |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 4859 | "umount/remount instead"); |
Eric Sandeen | ead6596 | 2007-02-10 01:46:08 -0800 | [diff] [blame] | 4860 | err = -EINVAL; |
| 4861 | goto restore_opts; |
| 4862 | } |
| 4863 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4864 | /* |
| 4865 | * Mounting a RDONLY partition read-write, so reread |
| 4866 | * and store the current valid flag. (It may have |
| 4867 | * been changed by e2fsck since we originally mounted |
| 4868 | * the partition.) |
| 4869 | */ |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 4870 | if (sbi->s_journal) |
| 4871 | ext4_clear_journal_err(sb, es); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4872 | sbi->s_mount_state = le16_to_cpu(es->s_state); |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 4873 | if (!ext4_setup_super(sb, es, 0)) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4874 | sb->s_flags &= ~MS_RDONLY; |
Darrick J. Wong | e2b911c | 2015-10-17 16:18:43 -0400 | [diff] [blame] | 4875 | if (ext4_has_feature_mmp(sb)) |
Johann Lombardi | c5e06d1 | 2011-05-24 18:31:25 -0400 | [diff] [blame] | 4876 | if (ext4_multi_mount_protect(sb, |
| 4877 | le64_to_cpu(es->s_mmp_block))) { |
| 4878 | err = -EROFS; |
| 4879 | goto restore_opts; |
| 4880 | } |
Christoph Hellwig | c79d967 | 2010-05-19 07:16:40 -0400 | [diff] [blame] | 4881 | enable_quota = 1; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4882 | } |
| 4883 | } |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 4884 | |
| 4885 | /* |
| 4886 | * Reinitialize lazy itable initialization thread based on |
| 4887 | * current settings |
| 4888 | */ |
| 4889 | if ((sb->s_flags & MS_RDONLY) || !test_opt(sb, INIT_INODE_TABLE)) |
| 4890 | ext4_unregister_li_request(sb); |
| 4891 | else { |
| 4892 | ext4_group_t first_not_zeroed; |
| 4893 | first_not_zeroed = ext4_has_uninit_itable(sb); |
| 4894 | ext4_register_li_request(sb, first_not_zeroed); |
| 4895 | } |
| 4896 | |
Theodore Ts'o | 6fd058f | 2009-05-17 15:38:01 -0400 | [diff] [blame] | 4897 | ext4_setup_system_zone(sb); |
Michael Tokarev | d096ad0 | 2012-12-25 14:08:16 -0500 | [diff] [blame] | 4898 | if (sbi->s_journal == NULL && !(old_sb_flags & MS_RDONLY)) |
Theodore Ts'o | e2d6705 | 2009-05-01 00:33:44 -0400 | [diff] [blame] | 4899 | ext4_commit_super(sb, 1); |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 4900 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4901 | #ifdef CONFIG_QUOTA |
| 4902 | /* Release old quota file names */ |
Jan Kara | a2d4a64 | 2014-09-11 11:15:15 -0400 | [diff] [blame] | 4903 | for (i = 0; i < EXT4_MAXQUOTAS; i++) |
Chen Gang | 03dafb5 | 2013-01-24 23:24:58 -0500 | [diff] [blame] | 4904 | kfree(old_opts.s_qf_names[i]); |
Aditya Kali | 7c319d3 | 2012-07-22 20:21:31 -0400 | [diff] [blame] | 4905 | if (enable_quota) { |
| 4906 | if (sb_any_quota_suspended(sb)) |
| 4907 | dquot_resume(sb, -1); |
Darrick J. Wong | e2b911c | 2015-10-17 16:18:43 -0400 | [diff] [blame] | 4908 | else if (ext4_has_feature_quota(sb)) { |
Aditya Kali | 7c319d3 | 2012-07-22 20:21:31 -0400 | [diff] [blame] | 4909 | err = ext4_enable_quotas(sb); |
Theodore Ts'o | 07724f9 | 2012-08-17 19:08:42 -0400 | [diff] [blame] | 4910 | if (err) |
Aditya Kali | 7c319d3 | 2012-07-22 20:21:31 -0400 | [diff] [blame] | 4911 | goto restore_opts; |
Aditya Kali | 7c319d3 | 2012-07-22 20:21:31 -0400 | [diff] [blame] | 4912 | } |
| 4913 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4914 | #endif |
Curt Wohlgemuth | d4c402d | 2010-05-16 12:00:00 -0400 | [diff] [blame] | 4915 | |
Theodore Ts'o | a26f499 | 2015-02-02 00:37:02 -0500 | [diff] [blame] | 4916 | *flags = (*flags & ~MS_LAZYTIME) | (sb->s_flags & MS_LAZYTIME); |
Curt Wohlgemuth | d4c402d | 2010-05-16 12:00:00 -0400 | [diff] [blame] | 4917 | ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s", orig_data); |
| 4918 | kfree(orig_data); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4919 | return 0; |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 4920 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4921 | restore_opts: |
| 4922 | sb->s_flags = old_sb_flags; |
| 4923 | sbi->s_mount_opt = old_opts.s_mount_opt; |
Theodore Ts'o | a2595b8 | 2010-12-15 20:30:48 -0500 | [diff] [blame] | 4924 | sbi->s_mount_opt2 = old_opts.s_mount_opt2; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4925 | sbi->s_resuid = old_opts.s_resuid; |
| 4926 | sbi->s_resgid = old_opts.s_resgid; |
| 4927 | sbi->s_commit_interval = old_opts.s_commit_interval; |
Theodore Ts'o | 3077384 | 2009-01-03 20:27:38 -0500 | [diff] [blame] | 4928 | sbi->s_min_batch_time = old_opts.s_min_batch_time; |
| 4929 | sbi->s_max_batch_time = old_opts.s_max_batch_time; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4930 | #ifdef CONFIG_QUOTA |
| 4931 | sbi->s_jquota_fmt = old_opts.s_jquota_fmt; |
Jan Kara | a2d4a64 | 2014-09-11 11:15:15 -0400 | [diff] [blame] | 4932 | for (i = 0; i < EXT4_MAXQUOTAS; i++) { |
Chen Gang | 03dafb5 | 2013-01-24 23:24:58 -0500 | [diff] [blame] | 4933 | kfree(sbi->s_qf_names[i]); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4934 | sbi->s_qf_names[i] = old_opts.s_qf_names[i]; |
| 4935 | } |
| 4936 | #endif |
Curt Wohlgemuth | d4c402d | 2010-05-16 12:00:00 -0400 | [diff] [blame] | 4937 | kfree(orig_data); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4938 | return err; |
| 4939 | } |
| 4940 | |
Li Xi | 689c958 | 2016-01-08 16:01:22 -0500 | [diff] [blame] | 4941 | #ifdef CONFIG_QUOTA |
| 4942 | static int ext4_statfs_project(struct super_block *sb, |
| 4943 | kprojid_t projid, struct kstatfs *buf) |
| 4944 | { |
| 4945 | struct kqid qid; |
| 4946 | struct dquot *dquot; |
| 4947 | u64 limit; |
| 4948 | u64 curblock; |
| 4949 | |
| 4950 | qid = make_kqid_projid(projid); |
| 4951 | dquot = dqget(sb, qid); |
| 4952 | if (IS_ERR(dquot)) |
| 4953 | return PTR_ERR(dquot); |
| 4954 | spin_lock(&dq_data_lock); |
| 4955 | |
| 4956 | limit = (dquot->dq_dqb.dqb_bsoftlimit ? |
| 4957 | dquot->dq_dqb.dqb_bsoftlimit : |
| 4958 | dquot->dq_dqb.dqb_bhardlimit) >> sb->s_blocksize_bits; |
| 4959 | if (limit && buf->f_blocks > limit) { |
| 4960 | curblock = dquot->dq_dqb.dqb_curspace >> sb->s_blocksize_bits; |
| 4961 | buf->f_blocks = limit; |
| 4962 | buf->f_bfree = buf->f_bavail = |
| 4963 | (buf->f_blocks > curblock) ? |
| 4964 | (buf->f_blocks - curblock) : 0; |
| 4965 | } |
| 4966 | |
| 4967 | limit = dquot->dq_dqb.dqb_isoftlimit ? |
| 4968 | dquot->dq_dqb.dqb_isoftlimit : |
| 4969 | dquot->dq_dqb.dqb_ihardlimit; |
| 4970 | if (limit && buf->f_files > limit) { |
| 4971 | buf->f_files = limit; |
| 4972 | buf->f_ffree = |
| 4973 | (buf->f_files > dquot->dq_dqb.dqb_curinodes) ? |
| 4974 | (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0; |
| 4975 | } |
| 4976 | |
| 4977 | spin_unlock(&dq_data_lock); |
| 4978 | dqput(dquot); |
| 4979 | return 0; |
| 4980 | } |
| 4981 | #endif |
| 4982 | |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 4983 | static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4984 | { |
| 4985 | struct super_block *sb = dentry->d_sb; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4986 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
| 4987 | struct ext4_super_block *es = sbi->s_es; |
Lukas Czerner | 27dd438 | 2013-04-09 22:11:22 -0400 | [diff] [blame] | 4988 | ext4_fsblk_t overhead = 0, resv_blocks; |
Pekka Enberg | 960cc39 | 2006-12-06 20:35:29 -0800 | [diff] [blame] | 4989 | u64 fsid; |
Kazuya Mio | d02a939 | 2011-05-24 18:30:07 -0400 | [diff] [blame] | 4990 | s64 bfree; |
Lukas Czerner | 27dd438 | 2013-04-09 22:11:22 -0400 | [diff] [blame] | 4991 | resv_blocks = EXT4_C2B(sbi, atomic64_read(&sbi->s_resv_clusters)); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4992 | |
Theodore Ts'o | 952fc18 | 2012-07-09 16:27:05 -0400 | [diff] [blame] | 4993 | if (!test_opt(sb, MINIX_DF)) |
| 4994 | overhead = sbi->s_overhead; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4995 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4996 | buf->f_type = EXT4_SUPER_MAGIC; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4997 | buf->f_bsize = sb->s_blocksize; |
Eric Sandeen | b72f78c | 2012-11-08 10:33:36 -0500 | [diff] [blame] | 4998 | buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, overhead); |
Theodore Ts'o | 5704265 | 2011-09-09 18:56:51 -0400 | [diff] [blame] | 4999 | bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) - |
| 5000 | percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter); |
Kazuya Mio | d02a939 | 2011-05-24 18:30:07 -0400 | [diff] [blame] | 5001 | /* prevent underflow in case that few free space is available */ |
Theodore Ts'o | 5704265 | 2011-09-09 18:56:51 -0400 | [diff] [blame] | 5002 | buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0)); |
Lukas Czerner | 27dd438 | 2013-04-09 22:11:22 -0400 | [diff] [blame] | 5003 | buf->f_bavail = buf->f_bfree - |
| 5004 | (ext4_r_blocks_count(es) + resv_blocks); |
| 5005 | if (buf->f_bfree < (ext4_r_blocks_count(es) + resv_blocks)) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5006 | buf->f_bavail = 0; |
| 5007 | buf->f_files = le32_to_cpu(es->s_inodes_count); |
Peter Zijlstra | 52d9f3b | 2007-10-16 23:25:44 -0700 | [diff] [blame] | 5008 | buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 5009 | buf->f_namelen = EXT4_NAME_LEN; |
Pekka Enberg | 960cc39 | 2006-12-06 20:35:29 -0800 | [diff] [blame] | 5010 | fsid = le64_to_cpup((void *)es->s_uuid) ^ |
| 5011 | le64_to_cpup((void *)es->s_uuid + sizeof(u64)); |
| 5012 | buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; |
| 5013 | buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 5014 | |
Li Xi | 689c958 | 2016-01-08 16:01:22 -0500 | [diff] [blame] | 5015 | #ifdef CONFIG_QUOTA |
| 5016 | if (ext4_test_inode_flag(dentry->d_inode, EXT4_INODE_PROJINHERIT) && |
| 5017 | sb_has_quota_limits_enabled(sb, PRJQUOTA)) |
| 5018 | ext4_statfs_project(sb, EXT4_I(dentry->d_inode)->i_projid, buf); |
| 5019 | #endif |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5020 | return 0; |
| 5021 | } |
| 5022 | |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 5023 | /* Helper function for writing quotas on sync - we need to start transaction |
| 5024 | * before quota file is locked for write. Otherwise the are possible deadlocks: |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5025 | * Process 1 Process 2 |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 5026 | * ext4_create() quota_sync() |
Jan Kara | a269eb1 | 2009-01-26 17:04:39 +0100 | [diff] [blame] | 5027 | * jbd2_journal_start() write_dquot() |
Christoph Hellwig | 871a293 | 2010-03-03 09:05:07 -0500 | [diff] [blame] | 5028 | * dquot_initialize() down(dqio_mutex) |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 5029 | * down(dqio_mutex) jbd2_journal_start() |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5030 | * |
| 5031 | */ |
| 5032 | |
| 5033 | #ifdef CONFIG_QUOTA |
| 5034 | |
| 5035 | static inline struct inode *dquot_to_inode(struct dquot *dquot) |
| 5036 | { |
Eric W. Biederman | 4c376dc | 2012-09-16 03:56:19 -0700 | [diff] [blame] | 5037 | return sb_dqopt(dquot->dq_sb)->files[dquot->dq_id.type]; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5038 | } |
| 5039 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 5040 | static int ext4_write_dquot(struct dquot *dquot) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5041 | { |
| 5042 | int ret, err; |
| 5043 | handle_t *handle; |
| 5044 | struct inode *inode; |
| 5045 | |
| 5046 | inode = dquot_to_inode(dquot); |
Theodore Ts'o | 9924a92 | 2013-02-08 21:59:22 -0500 | [diff] [blame] | 5047 | handle = ext4_journal_start(inode, EXT4_HT_QUOTA, |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 5048 | EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5049 | if (IS_ERR(handle)) |
| 5050 | return PTR_ERR(handle); |
| 5051 | ret = dquot_commit(dquot); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 5052 | err = ext4_journal_stop(handle); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5053 | if (!ret) |
| 5054 | ret = err; |
| 5055 | return ret; |
| 5056 | } |
| 5057 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 5058 | static int ext4_acquire_dquot(struct dquot *dquot) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5059 | { |
| 5060 | int ret, err; |
| 5061 | handle_t *handle; |
| 5062 | |
Theodore Ts'o | 9924a92 | 2013-02-08 21:59:22 -0500 | [diff] [blame] | 5063 | handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 5064 | EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5065 | if (IS_ERR(handle)) |
| 5066 | return PTR_ERR(handle); |
| 5067 | ret = dquot_acquire(dquot); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 5068 | err = ext4_journal_stop(handle); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5069 | if (!ret) |
| 5070 | ret = err; |
| 5071 | return ret; |
| 5072 | } |
| 5073 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 5074 | static int ext4_release_dquot(struct dquot *dquot) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5075 | { |
| 5076 | int ret, err; |
| 5077 | handle_t *handle; |
| 5078 | |
Theodore Ts'o | 9924a92 | 2013-02-08 21:59:22 -0500 | [diff] [blame] | 5079 | handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 5080 | EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); |
Jan Kara | 9c3013e | 2007-09-11 15:23:29 -0700 | [diff] [blame] | 5081 | if (IS_ERR(handle)) { |
| 5082 | /* Release dquot anyway to avoid endless cycle in dqput() */ |
| 5083 | dquot_release(dquot); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5084 | return PTR_ERR(handle); |
Jan Kara | 9c3013e | 2007-09-11 15:23:29 -0700 | [diff] [blame] | 5085 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5086 | ret = dquot_release(dquot); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 5087 | err = ext4_journal_stop(handle); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5088 | if (!ret) |
| 5089 | ret = err; |
| 5090 | return ret; |
| 5091 | } |
| 5092 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 5093 | static int ext4_mark_dquot_dirty(struct dquot *dquot) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5094 | { |
Jan Kara | 262b466 | 2013-03-02 17:57:08 -0500 | [diff] [blame] | 5095 | struct super_block *sb = dquot->dq_sb; |
| 5096 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
| 5097 | |
Jan Kara | 2c8be6b | 2008-05-13 21:27:55 -0400 | [diff] [blame] | 5098 | /* Are we journaling quotas? */ |
Darrick J. Wong | e2b911c | 2015-10-17 16:18:43 -0400 | [diff] [blame] | 5099 | if (ext4_has_feature_quota(sb) || |
Jan Kara | 262b466 | 2013-03-02 17:57:08 -0500 | [diff] [blame] | 5100 | sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5101 | dquot_mark_dquot_dirty(dquot); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 5102 | return ext4_write_dquot(dquot); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5103 | } else { |
| 5104 | return dquot_mark_dquot_dirty(dquot); |
| 5105 | } |
| 5106 | } |
| 5107 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 5108 | static int ext4_write_info(struct super_block *sb, int type) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5109 | { |
| 5110 | int ret, err; |
| 5111 | handle_t *handle; |
| 5112 | |
| 5113 | /* Data block + inode block */ |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 5114 | 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] | 5115 | if (IS_ERR(handle)) |
| 5116 | return PTR_ERR(handle); |
| 5117 | ret = dquot_commit_info(sb, type); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 5118 | err = ext4_journal_stop(handle); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5119 | if (!ret) |
| 5120 | ret = err; |
| 5121 | return ret; |
| 5122 | } |
| 5123 | |
| 5124 | /* |
| 5125 | * Turn on quotas during mount time - we need to find |
| 5126 | * the quota file and such... |
| 5127 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 5128 | static int ext4_quota_on_mount(struct super_block *sb, int type) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5129 | { |
Christoph Hellwig | 287a809 | 2010-05-19 07:16:45 -0400 | [diff] [blame] | 5130 | return dquot_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], |
| 5131 | EXT4_SB(sb)->s_jquota_fmt, type); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5132 | } |
| 5133 | |
Theodore Ts'o | daf647d | 2016-04-01 01:31:28 -0400 | [diff] [blame] | 5134 | static void lockdep_set_quota_inode(struct inode *inode, int subclass) |
| 5135 | { |
| 5136 | struct ext4_inode_info *ei = EXT4_I(inode); |
| 5137 | |
| 5138 | /* The first argument of lockdep_set_subclass has to be |
| 5139 | * *exactly* the same as the argument to init_rwsem() --- in |
| 5140 | * this case, in init_once() --- or lockdep gets unhappy |
| 5141 | * because the name of the lock is set using the |
| 5142 | * stringification of the argument to init_rwsem(). |
| 5143 | */ |
| 5144 | (void) ei; /* shut up clang warning if !CONFIG_LOCKDEP */ |
| 5145 | lockdep_set_subclass(&ei->i_data_sem, subclass); |
| 5146 | } |
| 5147 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5148 | /* |
| 5149 | * Standard function to be called on quota_on |
| 5150 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 5151 | 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] | 5152 | struct path *path) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5153 | { |
| 5154 | int err; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5155 | |
| 5156 | if (!test_opt(sb, QUOTA)) |
| 5157 | return -EINVAL; |
Jan Kara | 0623543 | 2008-05-13 19:11:51 -0400 | [diff] [blame] | 5158 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5159 | /* Quotafile not on the same filesystem? */ |
Al Viro | d8c9584 | 2011-12-07 18:16:57 -0500 | [diff] [blame] | 5160 | if (path->dentry->d_sb != sb) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5161 | return -EXDEV; |
Jan Kara | 0623543 | 2008-05-13 19:11:51 -0400 | [diff] [blame] | 5162 | /* Journaling quota? */ |
| 5163 | if (EXT4_SB(sb)->s_qf_names[type]) { |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 5164 | /* Quotafile not in fs root? */ |
Jan Kara | f00c9e4 | 2010-09-15 17:38:58 +0200 | [diff] [blame] | 5165 | if (path->dentry->d_parent != sb->s_root) |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 5166 | ext4_msg(sb, KERN_WARNING, |
| 5167 | "Quota file not on filesystem root. " |
| 5168 | "Journaled quota will not work"); |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 5169 | } |
Jan Kara | 0623543 | 2008-05-13 19:11:51 -0400 | [diff] [blame] | 5170 | |
| 5171 | /* |
| 5172 | * When we journal data on quota file, we have to flush journal to see |
| 5173 | * all updates to the file when we bypass pagecache... |
| 5174 | */ |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 5175 | if (EXT4_SB(sb)->s_journal && |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 5176 | ext4_should_journal_data(d_inode(path->dentry))) { |
Jan Kara | 0623543 | 2008-05-13 19:11:51 -0400 | [diff] [blame] | 5177 | /* |
| 5178 | * We don't need to lock updates but journal_flush() could |
| 5179 | * otherwise be livelocked... |
| 5180 | */ |
| 5181 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); |
Hidehiro Kawai | 7ffe1ea | 2008-10-10 20:29:21 -0400 | [diff] [blame] | 5182 | err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); |
Jan Kara | 0623543 | 2008-05-13 19:11:51 -0400 | [diff] [blame] | 5183 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); |
Jan Kara | f00c9e4 | 2010-09-15 17:38:58 +0200 | [diff] [blame] | 5184 | if (err) |
Hidehiro Kawai | 7ffe1ea | 2008-10-10 20:29:21 -0400 | [diff] [blame] | 5185 | return err; |
Jan Kara | 0623543 | 2008-05-13 19:11:51 -0400 | [diff] [blame] | 5186 | } |
Theodore Ts'o | daf647d | 2016-04-01 01:31:28 -0400 | [diff] [blame] | 5187 | lockdep_set_quota_inode(path->dentry->d_inode, I_DATA_SEM_QUOTA); |
| 5188 | err = dquot_quota_on(sb, type, format_id, path); |
| 5189 | if (err) |
| 5190 | lockdep_set_quota_inode(path->dentry->d_inode, |
| 5191 | I_DATA_SEM_NORMAL); |
| 5192 | return err; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5193 | } |
| 5194 | |
Aditya Kali | 7c319d3 | 2012-07-22 20:21:31 -0400 | [diff] [blame] | 5195 | static int ext4_quota_enable(struct super_block *sb, int type, int format_id, |
| 5196 | unsigned int flags) |
| 5197 | { |
| 5198 | int err; |
| 5199 | struct inode *qf_inode; |
Jan Kara | a2d4a64 | 2014-09-11 11:15:15 -0400 | [diff] [blame] | 5200 | unsigned long qf_inums[EXT4_MAXQUOTAS] = { |
Aditya Kali | 7c319d3 | 2012-07-22 20:21:31 -0400 | [diff] [blame] | 5201 | le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), |
Li Xi | 689c958 | 2016-01-08 16:01:22 -0500 | [diff] [blame] | 5202 | le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), |
| 5203 | le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) |
Aditya Kali | 7c319d3 | 2012-07-22 20:21:31 -0400 | [diff] [blame] | 5204 | }; |
| 5205 | |
Darrick J. Wong | e2b911c | 2015-10-17 16:18:43 -0400 | [diff] [blame] | 5206 | BUG_ON(!ext4_has_feature_quota(sb)); |
Aditya Kali | 7c319d3 | 2012-07-22 20:21:31 -0400 | [diff] [blame] | 5207 | |
| 5208 | if (!qf_inums[type]) |
| 5209 | return -EPERM; |
| 5210 | |
| 5211 | qf_inode = ext4_iget(sb, qf_inums[type]); |
| 5212 | if (IS_ERR(qf_inode)) { |
| 5213 | ext4_error(sb, "Bad quota inode # %lu", qf_inums[type]); |
| 5214 | return PTR_ERR(qf_inode); |
| 5215 | } |
| 5216 | |
Jan Kara | bcb1385 | 2013-04-09 09:21:41 -0400 | [diff] [blame] | 5217 | /* Don't account quota for quota files to avoid recursion */ |
| 5218 | qf_inode->i_flags |= S_NOQUOTA; |
Theodore Ts'o | daf647d | 2016-04-01 01:31:28 -0400 | [diff] [blame] | 5219 | lockdep_set_quota_inode(qf_inode, I_DATA_SEM_QUOTA); |
Aditya Kali | 7c319d3 | 2012-07-22 20:21:31 -0400 | [diff] [blame] | 5220 | err = dquot_enable(qf_inode, type, format_id, flags); |
| 5221 | iput(qf_inode); |
Theodore Ts'o | daf647d | 2016-04-01 01:31:28 -0400 | [diff] [blame] | 5222 | if (err) |
| 5223 | lockdep_set_quota_inode(qf_inode, I_DATA_SEM_NORMAL); |
Aditya Kali | 7c319d3 | 2012-07-22 20:21:31 -0400 | [diff] [blame] | 5224 | |
| 5225 | return err; |
| 5226 | } |
| 5227 | |
| 5228 | /* Enable usage tracking for all quota types. */ |
| 5229 | static int ext4_enable_quotas(struct super_block *sb) |
| 5230 | { |
| 5231 | int type, err = 0; |
Jan Kara | a2d4a64 | 2014-09-11 11:15:15 -0400 | [diff] [blame] | 5232 | unsigned long qf_inums[EXT4_MAXQUOTAS] = { |
Aditya Kali | 7c319d3 | 2012-07-22 20:21:31 -0400 | [diff] [blame] | 5233 | le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), |
Li Xi | 689c958 | 2016-01-08 16:01:22 -0500 | [diff] [blame] | 5234 | le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), |
| 5235 | le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) |
Aditya Kali | 7c319d3 | 2012-07-22 20:21:31 -0400 | [diff] [blame] | 5236 | }; |
| 5237 | |
| 5238 | sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE; |
Jan Kara | a2d4a64 | 2014-09-11 11:15:15 -0400 | [diff] [blame] | 5239 | for (type = 0; type < EXT4_MAXQUOTAS; type++) { |
Aditya Kali | 7c319d3 | 2012-07-22 20:21:31 -0400 | [diff] [blame] | 5240 | if (qf_inums[type]) { |
| 5241 | err = ext4_quota_enable(sb, type, QFMT_VFS_V1, |
| 5242 | DQUOT_USAGE_ENABLED); |
| 5243 | if (err) { |
| 5244 | ext4_warning(sb, |
Theodore Ts'o | 72ba745 | 2013-01-24 23:24:54 -0500 | [diff] [blame] | 5245 | "Failed to enable quota tracking " |
| 5246 | "(type=%d, err=%d). Please run " |
| 5247 | "e2fsck to fix.", type, err); |
Aditya Kali | 7c319d3 | 2012-07-22 20:21:31 -0400 | [diff] [blame] | 5248 | return err; |
| 5249 | } |
| 5250 | } |
| 5251 | } |
| 5252 | return 0; |
| 5253 | } |
| 5254 | |
Dmitry Monakhov | ca0e05e | 2010-08-01 17:48:36 -0400 | [diff] [blame] | 5255 | static int ext4_quota_off(struct super_block *sb, int type) |
| 5256 | { |
Jan Kara | 21f9769 | 2011-04-04 15:33:39 -0400 | [diff] [blame] | 5257 | struct inode *inode = sb_dqopt(sb)->files[type]; |
| 5258 | handle_t *handle; |
| 5259 | |
Dmitry Monakhov | 87009d8 | 2010-11-08 13:47:33 -0500 | [diff] [blame] | 5260 | /* Force all delayed allocation blocks to be allocated. |
| 5261 | * Caller already holds s_umount sem */ |
| 5262 | if (test_opt(sb, DELALLOC)) |
Dmitry Monakhov | ca0e05e | 2010-08-01 17:48:36 -0400 | [diff] [blame] | 5263 | sync_filesystem(sb); |
Dmitry Monakhov | ca0e05e | 2010-08-01 17:48:36 -0400 | [diff] [blame] | 5264 | |
Amir Goldstein | 0b26859 | 2011-05-16 09:59:13 -0400 | [diff] [blame] | 5265 | if (!inode) |
| 5266 | goto out; |
| 5267 | |
Jan Kara | 21f9769 | 2011-04-04 15:33:39 -0400 | [diff] [blame] | 5268 | /* Update modification times of quota files when userspace can |
| 5269 | * start looking at them */ |
Theodore Ts'o | 9924a92 | 2013-02-08 21:59:22 -0500 | [diff] [blame] | 5270 | handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); |
Jan Kara | 21f9769 | 2011-04-04 15:33:39 -0400 | [diff] [blame] | 5271 | if (IS_ERR(handle)) |
| 5272 | goto out; |
| 5273 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; |
| 5274 | ext4_mark_inode_dirty(handle, inode); |
| 5275 | ext4_journal_stop(handle); |
| 5276 | |
| 5277 | out: |
Dmitry Monakhov | ca0e05e | 2010-08-01 17:48:36 -0400 | [diff] [blame] | 5278 | return dquot_quota_off(sb, type); |
| 5279 | } |
| 5280 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5281 | /* Read data from quotafile - avoid pagecache and such because we cannot afford |
| 5282 | * 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] | 5283 | * itself serializes the operations (and no one else should touch the files) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5284 | * we don't have to be afraid of races */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 5285 | 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] | 5286 | size_t len, loff_t off) |
| 5287 | { |
| 5288 | struct inode *inode = sb_dqopt(sb)->files[type]; |
Aneesh Kumar K.V | 725d26d | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 5289 | ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5290 | int offset = off & (sb->s_blocksize - 1); |
| 5291 | int tocopy; |
| 5292 | size_t toread; |
| 5293 | struct buffer_head *bh; |
| 5294 | loff_t i_size = i_size_read(inode); |
| 5295 | |
| 5296 | if (off > i_size) |
| 5297 | return 0; |
| 5298 | if (off+len > i_size) |
| 5299 | len = i_size-off; |
| 5300 | toread = len; |
| 5301 | while (toread > 0) { |
| 5302 | tocopy = sb->s_blocksize - offset < toread ? |
| 5303 | sb->s_blocksize - offset : toread; |
Theodore Ts'o | 1c21502 | 2014-08-29 20:52:15 -0400 | [diff] [blame] | 5304 | bh = ext4_bread(NULL, inode, blk, 0); |
| 5305 | if (IS_ERR(bh)) |
| 5306 | return PTR_ERR(bh); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5307 | if (!bh) /* A hole? */ |
| 5308 | memset(data, 0, tocopy); |
| 5309 | else |
| 5310 | memcpy(data, bh->b_data+offset, tocopy); |
| 5311 | brelse(bh); |
| 5312 | offset = 0; |
| 5313 | toread -= tocopy; |
| 5314 | data += tocopy; |
| 5315 | blk++; |
| 5316 | } |
| 5317 | return len; |
| 5318 | } |
| 5319 | |
| 5320 | /* Write to quotafile (we know the transaction is already started and has |
| 5321 | * enough credits) */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 5322 | static ssize_t ext4_quota_write(struct super_block *sb, int type, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5323 | const char *data, size_t len, loff_t off) |
| 5324 | { |
| 5325 | struct inode *inode = sb_dqopt(sb)->files[type]; |
Aneesh Kumar K.V | 725d26d | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 5326 | ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); |
Theodore Ts'o | 1c21502 | 2014-08-29 20:52:15 -0400 | [diff] [blame] | 5327 | int err, offset = off & (sb->s_blocksize - 1); |
Theodore Ts'o | c5e298a | 2015-06-21 01:25:29 -0400 | [diff] [blame] | 5328 | int retries = 0; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5329 | struct buffer_head *bh; |
| 5330 | handle_t *handle = journal_current_handle(); |
| 5331 | |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 5332 | if (EXT4_SB(sb)->s_journal && !handle) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 5333 | ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" |
| 5334 | " cancelled because transaction is not started", |
Jan Kara | 9c3013e | 2007-09-11 15:23:29 -0700 | [diff] [blame] | 5335 | (unsigned long long)off, (unsigned long long)len); |
| 5336 | return -EIO; |
| 5337 | } |
Dmitry Monakhov | 67eeb56 | 2010-03-02 08:08:51 -0500 | [diff] [blame] | 5338 | /* |
| 5339 | * Since we account only one data block in transaction credits, |
| 5340 | * then it is impossible to cross a block boundary. |
| 5341 | */ |
| 5342 | if (sb->s_blocksize - offset < len) { |
| 5343 | ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" |
| 5344 | " cancelled because not block aligned", |
| 5345 | (unsigned long long)off, (unsigned long long)len); |
| 5346 | return -EIO; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5347 | } |
Dmitry Monakhov | 67eeb56 | 2010-03-02 08:08:51 -0500 | [diff] [blame] | 5348 | |
Theodore Ts'o | c5e298a | 2015-06-21 01:25:29 -0400 | [diff] [blame] | 5349 | do { |
| 5350 | bh = ext4_bread(handle, inode, blk, |
| 5351 | EXT4_GET_BLOCKS_CREATE | |
| 5352 | EXT4_GET_BLOCKS_METADATA_NOFAIL); |
| 5353 | } while (IS_ERR(bh) && (PTR_ERR(bh) == -ENOSPC) && |
| 5354 | ext4_should_retry_alloc(inode->i_sb, &retries)); |
Theodore Ts'o | 1c21502 | 2014-08-29 20:52:15 -0400 | [diff] [blame] | 5355 | if (IS_ERR(bh)) |
| 5356 | return PTR_ERR(bh); |
Dmitry Monakhov | 67eeb56 | 2010-03-02 08:08:51 -0500 | [diff] [blame] | 5357 | if (!bh) |
| 5358 | goto out; |
liang xie | 5d60125 | 2014-05-12 22:06:43 -0400 | [diff] [blame] | 5359 | BUFFER_TRACE(bh, "get write access"); |
Jan Kara | 62d2b5f | 2010-07-27 11:56:07 -0400 | [diff] [blame] | 5360 | err = ext4_journal_get_write_access(handle, bh); |
| 5361 | if (err) { |
| 5362 | brelse(bh); |
Theodore Ts'o | 1c21502 | 2014-08-29 20:52:15 -0400 | [diff] [blame] | 5363 | return err; |
Dmitry Monakhov | 67eeb56 | 2010-03-02 08:08:51 -0500 | [diff] [blame] | 5364 | } |
| 5365 | lock_buffer(bh); |
| 5366 | memcpy(bh->b_data+offset, data, len); |
| 5367 | flush_dcache_page(bh->b_page); |
| 5368 | unlock_buffer(bh); |
Jan Kara | 62d2b5f | 2010-07-27 11:56:07 -0400 | [diff] [blame] | 5369 | err = ext4_handle_dirty_metadata(handle, NULL, bh); |
Dmitry Monakhov | 67eeb56 | 2010-03-02 08:08:51 -0500 | [diff] [blame] | 5370 | brelse(bh); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5371 | out: |
Dmitry Monakhov | 67eeb56 | 2010-03-02 08:08:51 -0500 | [diff] [blame] | 5372 | if (inode->i_size < off + len) { |
| 5373 | i_size_write(inode, off + len); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 5374 | EXT4_I(inode)->i_disksize = inode->i_size; |
Jan Kara | 21f9769 | 2011-04-04 15:33:39 -0400 | [diff] [blame] | 5375 | ext4_mark_inode_dirty(handle, inode); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5376 | } |
Dmitry Monakhov | 67eeb56 | 2010-03-02 08:08:51 -0500 | [diff] [blame] | 5377 | return len; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5378 | } |
| 5379 | |
Theodore Ts'o | 8f0e874 | 2016-04-01 12:00:03 -0400 | [diff] [blame] | 5380 | static int ext4_get_next_id(struct super_block *sb, struct kqid *qid) |
| 5381 | { |
| 5382 | const struct quota_format_ops *ops; |
| 5383 | |
| 5384 | if (!sb_has_quota_loaded(sb, qid->type)) |
| 5385 | return -ESRCH; |
| 5386 | ops = sb_dqopt(sb)->ops[qid->type]; |
| 5387 | if (!ops || !ops->get_next_id) |
| 5388 | return -ENOSYS; |
| 5389 | return dquot_get_next_id(sb, qid); |
| 5390 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5391 | #endif |
| 5392 | |
Al Viro | 152a083 | 2010-07-25 00:46:55 +0400 | [diff] [blame] | 5393 | static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, |
| 5394 | const char *dev_name, void *data) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5395 | { |
Al Viro | 152a083 | 2010-07-25 00:46:55 +0400 | [diff] [blame] | 5396 | return mount_bdev(fs_type, flags, dev_name, data, ext4_fill_super); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5397 | } |
| 5398 | |
Jan Kara | c290ea0 | 2015-06-18 16:52:29 +0200 | [diff] [blame] | 5399 | #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT2) |
Theodore Ts'o | 24b5842 | 2009-12-07 14:08:51 -0500 | [diff] [blame] | 5400 | static inline void register_as_ext2(void) |
| 5401 | { |
| 5402 | int err = register_filesystem(&ext2_fs_type); |
| 5403 | if (err) |
| 5404 | printk(KERN_WARNING |
| 5405 | "EXT4-fs: Unable to register as ext2 (%d)\n", err); |
| 5406 | } |
| 5407 | |
| 5408 | static inline void unregister_as_ext2(void) |
| 5409 | { |
| 5410 | unregister_filesystem(&ext2_fs_type); |
| 5411 | } |
Theodore Ts'o | 2035e77 | 2011-04-18 17:29:14 -0400 | [diff] [blame] | 5412 | |
| 5413 | static inline int ext2_feature_set_ok(struct super_block *sb) |
| 5414 | { |
Darrick J. Wong | e2b911c | 2015-10-17 16:18:43 -0400 | [diff] [blame] | 5415 | if (ext4_has_unknown_ext2_incompat_features(sb)) |
Theodore Ts'o | 2035e77 | 2011-04-18 17:29:14 -0400 | [diff] [blame] | 5416 | return 0; |
| 5417 | if (sb->s_flags & MS_RDONLY) |
| 5418 | return 1; |
Darrick J. Wong | e2b911c | 2015-10-17 16:18:43 -0400 | [diff] [blame] | 5419 | if (ext4_has_unknown_ext2_ro_compat_features(sb)) |
Theodore Ts'o | 2035e77 | 2011-04-18 17:29:14 -0400 | [diff] [blame] | 5420 | return 0; |
| 5421 | return 1; |
| 5422 | } |
Theodore Ts'o | 24b5842 | 2009-12-07 14:08:51 -0500 | [diff] [blame] | 5423 | #else |
| 5424 | static inline void register_as_ext2(void) { } |
| 5425 | static inline void unregister_as_ext2(void) { } |
Theodore Ts'o | 2035e77 | 2011-04-18 17:29:14 -0400 | [diff] [blame] | 5426 | 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] | 5427 | #endif |
| 5428 | |
Theodore Ts'o | 24b5842 | 2009-12-07 14:08:51 -0500 | [diff] [blame] | 5429 | static inline void register_as_ext3(void) |
| 5430 | { |
| 5431 | int err = register_filesystem(&ext3_fs_type); |
| 5432 | if (err) |
| 5433 | printk(KERN_WARNING |
| 5434 | "EXT4-fs: Unable to register as ext3 (%d)\n", err); |
| 5435 | } |
| 5436 | |
| 5437 | static inline void unregister_as_ext3(void) |
| 5438 | { |
| 5439 | unregister_filesystem(&ext3_fs_type); |
| 5440 | } |
Theodore Ts'o | 2035e77 | 2011-04-18 17:29:14 -0400 | [diff] [blame] | 5441 | |
| 5442 | static inline int ext3_feature_set_ok(struct super_block *sb) |
| 5443 | { |
Darrick J. Wong | e2b911c | 2015-10-17 16:18:43 -0400 | [diff] [blame] | 5444 | if (ext4_has_unknown_ext3_incompat_features(sb)) |
Theodore Ts'o | 2035e77 | 2011-04-18 17:29:14 -0400 | [diff] [blame] | 5445 | return 0; |
Darrick J. Wong | e2b911c | 2015-10-17 16:18:43 -0400 | [diff] [blame] | 5446 | if (!ext4_has_feature_journal(sb)) |
Theodore Ts'o | 2035e77 | 2011-04-18 17:29:14 -0400 | [diff] [blame] | 5447 | return 0; |
| 5448 | if (sb->s_flags & MS_RDONLY) |
| 5449 | return 1; |
Darrick J. Wong | e2b911c | 2015-10-17 16:18:43 -0400 | [diff] [blame] | 5450 | if (ext4_has_unknown_ext3_ro_compat_features(sb)) |
Theodore Ts'o | 2035e77 | 2011-04-18 17:29:14 -0400 | [diff] [blame] | 5451 | return 0; |
| 5452 | return 1; |
| 5453 | } |
Theodore Ts'o | 24b5842 | 2009-12-07 14:08:51 -0500 | [diff] [blame] | 5454 | |
Theodore Ts'o | 03010a3 | 2008-10-10 20:02:48 -0400 | [diff] [blame] | 5455 | static struct file_system_type ext4_fs_type = { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5456 | .owner = THIS_MODULE, |
Theodore Ts'o | 03010a3 | 2008-10-10 20:02:48 -0400 | [diff] [blame] | 5457 | .name = "ext4", |
Al Viro | 152a083 | 2010-07-25 00:46:55 +0400 | [diff] [blame] | 5458 | .mount = ext4_mount, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5459 | .kill_sb = kill_block_super, |
| 5460 | .fs_flags = FS_REQUIRES_DEV, |
| 5461 | }; |
Eric W. Biederman | 7f78e03 | 2013-03-02 19:39:14 -0800 | [diff] [blame] | 5462 | MODULE_ALIAS_FS("ext4"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5463 | |
Eric Sandeen | e9e3bce | 2011-02-12 08:17:34 -0500 | [diff] [blame] | 5464 | /* Shared across all ext4 file systems */ |
| 5465 | wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; |
Eric Sandeen | e9e3bce | 2011-02-12 08:17:34 -0500 | [diff] [blame] | 5466 | |
Theodore Ts'o | 5dabfc7 | 2010-10-27 21:30:14 -0400 | [diff] [blame] | 5467 | static int __init ext4_init_fs(void) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5468 | { |
Eric Sandeen | e9e3bce | 2011-02-12 08:17:34 -0500 | [diff] [blame] | 5469 | int i, err; |
Alex Tomas | c9de560 | 2008-01-29 00:19:52 -0500 | [diff] [blame] | 5470 | |
Theodore Ts'o | e294a53 | 2015-08-15 14:59:44 -0400 | [diff] [blame] | 5471 | ratelimit_state_init(&ext4_mount_msg_ratelimit, 30 * HZ, 64); |
Al Viro | 07c0c5d8 | 2012-03-20 22:05:02 -0400 | [diff] [blame] | 5472 | ext4_li_info = NULL; |
| 5473 | mutex_init(&ext4_li_mtx); |
| 5474 | |
Carlos Maiolino | 9a4c801 | 2012-12-10 16:30:45 -0500 | [diff] [blame] | 5475 | /* Build-time check for flags consistency */ |
Dmitry Monakhov | 12e9b89 | 2010-05-16 22:00:00 -0400 | [diff] [blame] | 5476 | ext4_check_flag_values(); |
Eric Sandeen | e9e3bce | 2011-02-12 08:17:34 -0500 | [diff] [blame] | 5477 | |
Jan Kara | e142d05 | 2016-03-08 22:44:50 -0500 | [diff] [blame] | 5478 | for (i = 0; i < EXT4_WQ_HASH_SZ; i++) |
Eric Sandeen | e9e3bce | 2011-02-12 08:17:34 -0500 | [diff] [blame] | 5479 | init_waitqueue_head(&ext4__ioend_wq[i]); |
Eric Sandeen | e9e3bce | 2011-02-12 08:17:34 -0500 | [diff] [blame] | 5480 | |
Zheng Liu | 51865fd | 2012-11-08 21:57:32 -0500 | [diff] [blame] | 5481 | err = ext4_init_es(); |
Theodore Ts'o | 6fd058f | 2009-05-17 15:38:01 -0400 | [diff] [blame] | 5482 | if (err) |
| 5483 | return err; |
Zheng Liu | 51865fd | 2012-11-08 21:57:32 -0500 | [diff] [blame] | 5484 | |
| 5485 | err = ext4_init_pageio(); |
| 5486 | if (err) |
Theodore Ts'o | b579901 | 2015-09-23 12:44:17 -0400 | [diff] [blame] | 5487 | goto out5; |
Zheng Liu | 51865fd | 2012-11-08 21:57:32 -0500 | [diff] [blame] | 5488 | |
Theodore Ts'o | 5dabfc7 | 2010-10-27 21:30:14 -0400 | [diff] [blame] | 5489 | err = ext4_init_system_zone(); |
Theodore Ts'o | bd2d021 | 2010-10-27 21:30:10 -0400 | [diff] [blame] | 5490 | if (err) |
Theodore Ts'o | b579901 | 2015-09-23 12:44:17 -0400 | [diff] [blame] | 5491 | goto out4; |
Lukas Czerner | 857ac88 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 5492 | |
Theodore Ts'o | b579901 | 2015-09-23 12:44:17 -0400 | [diff] [blame] | 5493 | err = ext4_init_sysfs(); |
Theodore Ts'o | dd68314 | 2011-02-03 14:33:49 -0500 | [diff] [blame] | 5494 | if (err) |
Theodore Ts'o | b579901 | 2015-09-23 12:44:17 -0400 | [diff] [blame] | 5495 | goto out3; |
Lukas Czerner | 857ac88 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 5496 | |
Theodore Ts'o | 5dabfc7 | 2010-10-27 21:30:14 -0400 | [diff] [blame] | 5497 | err = ext4_init_mballoc(); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5498 | if (err) |
Alex Tomas | c9de560 | 2008-01-29 00:19:52 -0500 | [diff] [blame] | 5499 | goto out2; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5500 | err = init_inodecache(); |
| 5501 | if (err) |
| 5502 | goto out1; |
Theodore Ts'o | 24b5842 | 2009-12-07 14:08:51 -0500 | [diff] [blame] | 5503 | register_as_ext3(); |
Theodore Ts'o | 2035e77 | 2011-04-18 17:29:14 -0400 | [diff] [blame] | 5504 | register_as_ext2(); |
Theodore Ts'o | 03010a3 | 2008-10-10 20:02:48 -0400 | [diff] [blame] | 5505 | err = register_filesystem(&ext4_fs_type); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5506 | if (err) |
| 5507 | goto out; |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 5508 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5509 | return 0; |
| 5510 | out: |
Theodore Ts'o | 24b5842 | 2009-12-07 14:08:51 -0500 | [diff] [blame] | 5511 | unregister_as_ext2(); |
| 5512 | unregister_as_ext3(); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5513 | destroy_inodecache(); |
| 5514 | out1: |
Theodore Ts'o | 5dabfc7 | 2010-10-27 21:30:14 -0400 | [diff] [blame] | 5515 | ext4_exit_mballoc(); |
T Makphaibulchoke | 9c191f7 | 2014-03-18 19:24:49 -0400 | [diff] [blame] | 5516 | out2: |
Theodore Ts'o | b579901 | 2015-09-23 12:44:17 -0400 | [diff] [blame] | 5517 | ext4_exit_sysfs(); |
| 5518 | out3: |
Theodore Ts'o | dd68314 | 2011-02-03 14:33:49 -0500 | [diff] [blame] | 5519 | ext4_exit_system_zone(); |
Theodore Ts'o | b579901 | 2015-09-23 12:44:17 -0400 | [diff] [blame] | 5520 | out4: |
Theodore Ts'o | 5dabfc7 | 2010-10-27 21:30:14 -0400 | [diff] [blame] | 5521 | ext4_exit_pageio(); |
Theodore Ts'o | b579901 | 2015-09-23 12:44:17 -0400 | [diff] [blame] | 5522 | out5: |
Zheng Liu | 51865fd | 2012-11-08 21:57:32 -0500 | [diff] [blame] | 5523 | ext4_exit_es(); |
| 5524 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5525 | return err; |
| 5526 | } |
| 5527 | |
Theodore Ts'o | 5dabfc7 | 2010-10-27 21:30:14 -0400 | [diff] [blame] | 5528 | static void __exit ext4_exit_fs(void) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5529 | { |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 5530 | ext4_destroy_lazyinit_thread(); |
Theodore Ts'o | 24b5842 | 2009-12-07 14:08:51 -0500 | [diff] [blame] | 5531 | unregister_as_ext2(); |
| 5532 | unregister_as_ext3(); |
Theodore Ts'o | 03010a3 | 2008-10-10 20:02:48 -0400 | [diff] [blame] | 5533 | unregister_filesystem(&ext4_fs_type); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5534 | destroy_inodecache(); |
Theodore Ts'o | 5dabfc7 | 2010-10-27 21:30:14 -0400 | [diff] [blame] | 5535 | ext4_exit_mballoc(); |
Theodore Ts'o | b579901 | 2015-09-23 12:44:17 -0400 | [diff] [blame] | 5536 | ext4_exit_sysfs(); |
Theodore Ts'o | 5dabfc7 | 2010-10-27 21:30:14 -0400 | [diff] [blame] | 5537 | ext4_exit_system_zone(); |
| 5538 | ext4_exit_pageio(); |
Eric Sandeen | dd12ed1 | 2013-07-26 15:21:11 -0400 | [diff] [blame] | 5539 | ext4_exit_es(); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5540 | } |
| 5541 | |
| 5542 | 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] | 5543 | MODULE_DESCRIPTION("Fourth Extended Filesystem"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 5544 | MODULE_LICENSE("GPL"); |
Theodore Ts'o | 5dabfc7 | 2010-10-27 21:30:14 -0400 | [diff] [blame] | 5545 | module_init(ext4_init_fs) |
| 5546 | module_exit(ext4_exit_fs) |