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> |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 24 | #include <linux/jbd2.h> |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 25 | #include <linux/slab.h> |
| 26 | #include <linux/init.h> |
| 27 | #include <linux/blkdev.h> |
| 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 | 9f6200b | 2008-09-23 09:18:24 -0400 | [diff] [blame] | 37 | #include <linux/proc_fs.h> |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 38 | #include <linux/ctype.h> |
Vignesh Babu | 1330593 | 2007-07-18 09:11:02 -0400 | [diff] [blame] | 39 | #include <linux/log2.h> |
Andreas Dilger | 717d50e | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 40 | #include <linux/crc16.h> |
Dan Magenheimer | 7abc52c | 2011-05-26 10:02:03 -0600 | [diff] [blame] | 41 | #include <linux/cleancache.h> |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 42 | #include <asm/uaccess.h> |
| 43 | |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 44 | #include <linux/kthread.h> |
| 45 | #include <linux/freezer.h> |
| 46 | |
Christoph Hellwig | 3dcf545 | 2008-04-29 18:13:32 -0400 | [diff] [blame] | 47 | #include "ext4.h" |
Eric Gouriou | 6f91bc5 | 2011-10-27 11:43:23 -0400 | [diff] [blame] | 48 | #include "ext4_extents.h" |
Christoph Hellwig | 3dcf545 | 2008-04-29 18:13:32 -0400 | [diff] [blame] | 49 | #include "ext4_jbd2.h" |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 50 | #include "xattr.h" |
| 51 | #include "acl.h" |
Theodore Ts'o | 3661d28 | 2009-09-14 22:59:50 -0400 | [diff] [blame] | 52 | #include "mballoc.h" |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 53 | |
Theodore Ts'o | 9bffad1 | 2009-06-17 11:48:11 -0400 | [diff] [blame] | 54 | #define CREATE_TRACE_POINTS |
| 55 | #include <trace/events/ext4.h> |
| 56 | |
Theodore Ts'o | 1f109d5 | 2010-10-27 21:30:14 -0400 | [diff] [blame] | 57 | static struct proc_dir_entry *ext4_proc_root; |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 58 | static struct kset *ext4_kset; |
Lukas Czerner | 0b75a84 | 2011-02-23 12:22:49 -0500 | [diff] [blame] | 59 | static struct ext4_lazy_init *ext4_li_info; |
| 60 | static struct mutex ext4_li_mtx; |
| 61 | static struct ext4_features *ext4_feat; |
Theodore Ts'o | 9f6200b | 2008-09-23 09:18:24 -0400 | [diff] [blame] | 62 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 63 | static int ext4_load_journal(struct super_block *, struct ext4_super_block *, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 64 | unsigned long journal_devnum); |
Theodore Ts'o | 2adf6da | 2012-03-03 23:20:50 -0500 | [diff] [blame] | 65 | static int ext4_show_options(struct seq_file *seq, struct dentry *root); |
Theodore Ts'o | e2d6705 | 2009-05-01 00:33:44 -0400 | [diff] [blame] | 66 | static int ext4_commit_super(struct super_block *sb, int sync); |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 67 | static void ext4_mark_recovery_complete(struct super_block *sb, |
| 68 | struct ext4_super_block *es); |
| 69 | static void ext4_clear_journal_err(struct super_block *sb, |
| 70 | struct ext4_super_block *es); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 71 | static int ext4_sync_fs(struct super_block *sb, int wait); |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 72 | static const char *ext4_decode_error(struct super_block *sb, int errno, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 73 | char nbuf[16]); |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 74 | static int ext4_remount(struct super_block *sb, int *flags, char *data); |
| 75 | static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); |
Takashi Sato | c4be0c1 | 2009-01-09 16:40:58 -0800 | [diff] [blame] | 76 | static int ext4_unfreeze(struct super_block *sb); |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 77 | static void ext4_write_super(struct super_block *sb); |
Takashi Sato | c4be0c1 | 2009-01-09 16:40:58 -0800 | [diff] [blame] | 78 | static int ext4_freeze(struct super_block *sb); |
Al Viro | 152a083 | 2010-07-25 00:46:55 +0400 | [diff] [blame] | 79 | static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, |
| 80 | const char *dev_name, void *data); |
Theodore Ts'o | 2035e77 | 2011-04-18 17:29:14 -0400 | [diff] [blame] | 81 | static inline int ext2_feature_set_ok(struct super_block *sb); |
| 82 | static inline int ext3_feature_set_ok(struct super_block *sb); |
Amir Goldstein | d39195c | 2011-02-28 00:53:45 -0500 | [diff] [blame] | 83 | static int ext4_feature_set_ok(struct super_block *sb, int readonly); |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 84 | static void ext4_destroy_lazyinit_thread(void); |
| 85 | static void ext4_unregister_li_request(struct super_block *sb); |
Eric Sandeen | 8f1f745 | 2011-02-03 14:33:15 -0500 | [diff] [blame] | 86 | static void ext4_clear_request_list(void); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 87 | |
Theodore Ts'o | 2035e77 | 2011-04-18 17:29:14 -0400 | [diff] [blame] | 88 | #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) |
| 89 | static struct file_system_type ext2_fs_type = { |
| 90 | .owner = THIS_MODULE, |
| 91 | .name = "ext2", |
| 92 | .mount = ext4_mount, |
| 93 | .kill_sb = kill_block_super, |
| 94 | .fs_flags = FS_REQUIRES_DEV, |
| 95 | }; |
| 96 | #define IS_EXT2_SB(sb) ((sb)->s_bdev->bd_holder == &ext2_fs_type) |
| 97 | #else |
| 98 | #define IS_EXT2_SB(sb) (0) |
| 99 | #endif |
| 100 | |
| 101 | |
Jan Kara | ba69f9a | 2010-03-24 20:18:37 -0400 | [diff] [blame] | 102 | #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) |
| 103 | static struct file_system_type ext3_fs_type = { |
| 104 | .owner = THIS_MODULE, |
| 105 | .name = "ext3", |
Al Viro | 152a083 | 2010-07-25 00:46:55 +0400 | [diff] [blame] | 106 | .mount = ext4_mount, |
Jan Kara | ba69f9a | 2010-03-24 20:18:37 -0400 | [diff] [blame] | 107 | .kill_sb = kill_block_super, |
| 108 | .fs_flags = FS_REQUIRES_DEV, |
| 109 | }; |
| 110 | #define IS_EXT3_SB(sb) ((sb)->s_bdev->bd_holder == &ext3_fs_type) |
| 111 | #else |
| 112 | #define IS_EXT3_SB(sb) (0) |
| 113 | #endif |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 114 | |
Theodore Ts'o | 9933fc0 | 2011-08-01 08:45:02 -0400 | [diff] [blame] | 115 | void *ext4_kvmalloc(size_t size, gfp_t flags) |
| 116 | { |
| 117 | void *ret; |
| 118 | |
| 119 | ret = kmalloc(size, flags); |
| 120 | if (!ret) |
| 121 | ret = __vmalloc(size, flags, PAGE_KERNEL); |
| 122 | return ret; |
| 123 | } |
| 124 | |
| 125 | void *ext4_kvzalloc(size_t size, gfp_t flags) |
| 126 | { |
| 127 | void *ret; |
| 128 | |
Mathias Krause | db9481c | 2011-08-03 14:57:11 -0400 | [diff] [blame] | 129 | ret = kzalloc(size, flags); |
Theodore Ts'o | 9933fc0 | 2011-08-01 08:45:02 -0400 | [diff] [blame] | 130 | if (!ret) |
| 131 | ret = __vmalloc(size, flags | __GFP_ZERO, PAGE_KERNEL); |
| 132 | return ret; |
| 133 | } |
| 134 | |
| 135 | void ext4_kvfree(void *ptr) |
| 136 | { |
| 137 | if (is_vmalloc_addr(ptr)) |
| 138 | vfree(ptr); |
| 139 | else |
| 140 | kfree(ptr); |
| 141 | |
| 142 | } |
| 143 | |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 144 | ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, |
| 145 | struct ext4_group_desc *bg) |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 146 | { |
Aneesh Kumar K.V | 3a14589 | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 147 | return le32_to_cpu(bg->bg_block_bitmap_lo) | |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 148 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 149 | (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] | 150 | } |
| 151 | |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 152 | ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, |
| 153 | struct ext4_group_desc *bg) |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 154 | { |
Aneesh Kumar K.V | 5272f83 | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 155 | return le32_to_cpu(bg->bg_inode_bitmap_lo) | |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 156 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 157 | (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] | 158 | } |
| 159 | |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 160 | ext4_fsblk_t ext4_inode_table(struct super_block *sb, |
| 161 | struct ext4_group_desc *bg) |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 162 | { |
Aneesh Kumar K.V | 5272f83 | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 163 | return le32_to_cpu(bg->bg_inode_table_lo) | |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 164 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 165 | (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] | 166 | } |
| 167 | |
Theodore Ts'o | 021b65b | 2011-09-09 19:08:51 -0400 | [diff] [blame] | 168 | __u32 ext4_free_group_clusters(struct super_block *sb, |
| 169 | struct ext4_group_desc *bg) |
Aneesh Kumar K.V | 560671a | 2009-01-05 22:20:24 -0500 | [diff] [blame] | 170 | { |
| 171 | return le16_to_cpu(bg->bg_free_blocks_count_lo) | |
| 172 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 173 | (__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] | 174 | } |
| 175 | |
| 176 | __u32 ext4_free_inodes_count(struct super_block *sb, |
| 177 | struct ext4_group_desc *bg) |
| 178 | { |
| 179 | return le16_to_cpu(bg->bg_free_inodes_count_lo) | |
| 180 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 181 | (__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] | 182 | } |
| 183 | |
| 184 | __u32 ext4_used_dirs_count(struct super_block *sb, |
| 185 | struct ext4_group_desc *bg) |
| 186 | { |
| 187 | return le16_to_cpu(bg->bg_used_dirs_count_lo) | |
| 188 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 189 | (__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] | 190 | } |
| 191 | |
| 192 | __u32 ext4_itable_unused_count(struct super_block *sb, |
| 193 | struct ext4_group_desc *bg) |
| 194 | { |
| 195 | return le16_to_cpu(bg->bg_itable_unused_lo) | |
| 196 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 197 | (__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] | 198 | } |
| 199 | |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 200 | void ext4_block_bitmap_set(struct super_block *sb, |
| 201 | struct ext4_group_desc *bg, ext4_fsblk_t blk) |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 202 | { |
Aneesh Kumar K.V | 3a14589 | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 203 | bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 204 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
| 205 | bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 206 | } |
| 207 | |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 208 | void ext4_inode_bitmap_set(struct super_block *sb, |
| 209 | struct ext4_group_desc *bg, ext4_fsblk_t blk) |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 210 | { |
Aneesh Kumar K.V | 5272f83 | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 211 | bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 212 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
| 213 | bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 214 | } |
| 215 | |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 216 | void ext4_inode_table_set(struct super_block *sb, |
| 217 | struct ext4_group_desc *bg, ext4_fsblk_t blk) |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 218 | { |
Aneesh Kumar K.V | 5272f83 | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 219 | bg->bg_inode_table_lo = cpu_to_le32((u32)blk); |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 220 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
| 221 | bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 222 | } |
| 223 | |
Theodore Ts'o | 021b65b | 2011-09-09 19:08:51 -0400 | [diff] [blame] | 224 | void ext4_free_group_clusters_set(struct super_block *sb, |
| 225 | struct ext4_group_desc *bg, __u32 count) |
Aneesh Kumar K.V | 560671a | 2009-01-05 22:20:24 -0500 | [diff] [blame] | 226 | { |
| 227 | bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); |
| 228 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
| 229 | bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); |
| 230 | } |
| 231 | |
| 232 | void ext4_free_inodes_set(struct super_block *sb, |
| 233 | struct ext4_group_desc *bg, __u32 count) |
| 234 | { |
| 235 | bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); |
| 236 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
| 237 | bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); |
| 238 | } |
| 239 | |
| 240 | void ext4_used_dirs_set(struct super_block *sb, |
| 241 | struct ext4_group_desc *bg, __u32 count) |
| 242 | { |
| 243 | bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); |
| 244 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
| 245 | bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); |
| 246 | } |
| 247 | |
| 248 | void ext4_itable_unused_set(struct super_block *sb, |
| 249 | struct ext4_group_desc *bg, __u32 count) |
| 250 | { |
| 251 | bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); |
| 252 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
| 253 | bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); |
| 254 | } |
| 255 | |
Curt Wohlgemuth | d3d1faf | 2009-09-29 11:01:03 -0400 | [diff] [blame] | 256 | |
| 257 | /* Just increment the non-pointer handle value */ |
| 258 | static handle_t *ext4_get_nojournal(void) |
| 259 | { |
| 260 | handle_t *handle = current->journal_info; |
| 261 | unsigned long ref_cnt = (unsigned long)handle; |
| 262 | |
| 263 | BUG_ON(ref_cnt >= EXT4_NOJOURNAL_MAX_REF_COUNT); |
| 264 | |
| 265 | ref_cnt++; |
| 266 | handle = (handle_t *)ref_cnt; |
| 267 | |
| 268 | current->journal_info = handle; |
| 269 | return handle; |
| 270 | } |
| 271 | |
| 272 | |
| 273 | /* Decrement the non-pointer handle value */ |
| 274 | static void ext4_put_nojournal(handle_t *handle) |
| 275 | { |
| 276 | unsigned long ref_cnt = (unsigned long)handle; |
| 277 | |
| 278 | BUG_ON(ref_cnt == 0); |
| 279 | |
| 280 | ref_cnt--; |
| 281 | handle = (handle_t *)ref_cnt; |
| 282 | |
| 283 | current->journal_info = handle; |
| 284 | } |
| 285 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 286 | /* |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 287 | * Wrappers for jbd2_journal_start/end. |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 288 | * |
| 289 | * The only special thing we need to do here is to make sure that all |
| 290 | * journal_end calls result in the superblock being marked dirty, so |
| 291 | * that sync() will call the filesystem's write_super callback if |
| 292 | * appropriate. |
Yongqiang Yang | be4f27d | 2011-04-10 22:06:07 -0400 | [diff] [blame] | 293 | * |
| 294 | * To avoid j_barrier hold in userspace when a user calls freeze(), |
| 295 | * ext4 prevents a new handle from being started by s_frozen, which |
| 296 | * is in an upper layer. |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 297 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 298 | handle_t *ext4_journal_start_sb(struct super_block *sb, int nblocks) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 299 | { |
| 300 | journal_t *journal; |
Yongqiang Yang | be4f27d | 2011-04-10 22:06:07 -0400 | [diff] [blame] | 301 | handle_t *handle; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 302 | |
Theodore Ts'o | 1270639 | 2011-07-10 22:37:50 -0400 | [diff] [blame] | 303 | trace_ext4_journal_start(sb, nblocks, _RET_IP_); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 304 | if (sb->s_flags & MS_RDONLY) |
| 305 | return ERR_PTR(-EROFS); |
| 306 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 307 | journal = EXT4_SB(sb)->s_journal; |
Yongqiang Yang | be4f27d | 2011-04-10 22:06:07 -0400 | [diff] [blame] | 308 | handle = ext4_journal_current_handle(); |
| 309 | |
| 310 | /* |
| 311 | * If a handle has been started, it should be allowed to |
| 312 | * finish, otherwise deadlock could happen between freeze |
| 313 | * and others(e.g. truncate) due to the restart of the |
| 314 | * journal handle if the filesystem is forzen and active |
| 315 | * handles are not stopped. |
| 316 | */ |
| 317 | if (!handle) |
| 318 | vfs_check_frozen(sb, SB_FREEZE_TRANS); |
| 319 | |
| 320 | if (!journal) |
| 321 | return ext4_get_nojournal(); |
| 322 | /* |
| 323 | * Special case here: if the journal has aborted behind our |
| 324 | * backs (eg. EIO in the commit thread), then we still need to |
| 325 | * take the FS itself readonly cleanly. |
| 326 | */ |
| 327 | if (is_journal_aborted(journal)) { |
| 328 | ext4_abort(sb, "Detected aborted journal"); |
| 329 | return ERR_PTR(-EROFS); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 330 | } |
Yongqiang Yang | be4f27d | 2011-04-10 22:06:07 -0400 | [diff] [blame] | 331 | return jbd2_journal_start(journal, nblocks); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 332 | } |
| 333 | |
| 334 | /* |
| 335 | * The only special thing we need to do here is to make sure that all |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 336 | * jbd2_journal_stop calls result in the superblock being marked dirty, so |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 337 | * that sync() will call the filesystem's write_super callback if |
| 338 | * appropriate. |
| 339 | */ |
Theodore Ts'o | c398eda | 2010-07-27 11:56:40 -0400 | [diff] [blame] | 340 | int __ext4_journal_stop(const char *where, unsigned int line, handle_t *handle) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 341 | { |
| 342 | struct super_block *sb; |
| 343 | int err; |
| 344 | int rc; |
| 345 | |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 346 | if (!ext4_handle_valid(handle)) { |
Curt Wohlgemuth | d3d1faf | 2009-09-29 11:01:03 -0400 | [diff] [blame] | 347 | ext4_put_nojournal(handle); |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 348 | return 0; |
| 349 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 350 | sb = handle->h_transaction->t_journal->j_private; |
| 351 | err = handle->h_err; |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 352 | rc = jbd2_journal_stop(handle); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 353 | |
| 354 | if (!err) |
| 355 | err = rc; |
| 356 | if (err) |
Theodore Ts'o | c398eda | 2010-07-27 11:56:40 -0400 | [diff] [blame] | 357 | __ext4_std_error(sb, where, line, err); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 358 | return err; |
| 359 | } |
| 360 | |
Theodore Ts'o | 90c7201 | 2010-06-29 14:53:24 -0400 | [diff] [blame] | 361 | void ext4_journal_abort_handle(const char *caller, unsigned int line, |
| 362 | const char *err_fn, struct buffer_head *bh, |
| 363 | handle_t *handle, int err) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 364 | { |
| 365 | char nbuf[16]; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 366 | const char *errstr = ext4_decode_error(NULL, err, nbuf); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 367 | |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 368 | BUG_ON(!ext4_handle_valid(handle)); |
| 369 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 370 | if (bh) |
| 371 | BUFFER_TRACE(bh, "abort"); |
| 372 | |
| 373 | if (!handle->h_err) |
| 374 | handle->h_err = err; |
| 375 | |
| 376 | if (is_handle_aborted(handle)) |
| 377 | return; |
| 378 | |
Theodore Ts'o | 92b9781 | 2012-03-19 23:41:49 -0400 | [diff] [blame] | 379 | printk(KERN_ERR "EXT4-fs: %s:%d: aborting transaction: %s in %s\n", |
Theodore Ts'o | 90c7201 | 2010-06-29 14:53:24 -0400 | [diff] [blame] | 380 | caller, line, errstr, err_fn); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 381 | |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 382 | jbd2_journal_abort_handle(handle); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 383 | } |
| 384 | |
Theodore Ts'o | 1c13d5c | 2010-07-27 11:56:03 -0400 | [diff] [blame] | 385 | static void __save_error_info(struct super_block *sb, const char *func, |
| 386 | unsigned int line) |
| 387 | { |
| 388 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
| 389 | |
| 390 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; |
| 391 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); |
| 392 | es->s_last_error_time = cpu_to_le32(get_seconds()); |
| 393 | strncpy(es->s_last_error_func, func, sizeof(es->s_last_error_func)); |
| 394 | es->s_last_error_line = cpu_to_le32(line); |
| 395 | if (!es->s_first_error_time) { |
| 396 | es->s_first_error_time = es->s_last_error_time; |
| 397 | strncpy(es->s_first_error_func, func, |
| 398 | sizeof(es->s_first_error_func)); |
| 399 | es->s_first_error_line = cpu_to_le32(line); |
| 400 | es->s_first_error_ino = es->s_last_error_ino; |
| 401 | es->s_first_error_block = es->s_last_error_block; |
| 402 | } |
Theodore Ts'o | 66e61a9 | 2010-07-27 11:56:04 -0400 | [diff] [blame] | 403 | /* |
| 404 | * Start the daily error reporting function if it hasn't been |
| 405 | * started already |
| 406 | */ |
| 407 | if (!es->s_error_count) |
| 408 | mod_timer(&EXT4_SB(sb)->s_err_report, jiffies + 24*60*60*HZ); |
Theodore Ts'o | 1c13d5c | 2010-07-27 11:56:03 -0400 | [diff] [blame] | 409 | es->s_error_count = cpu_to_le32(le32_to_cpu(es->s_error_count) + 1); |
| 410 | } |
| 411 | |
| 412 | static void save_error_info(struct super_block *sb, const char *func, |
| 413 | unsigned int line) |
| 414 | { |
| 415 | __save_error_info(sb, func, line); |
| 416 | ext4_commit_super(sb, 1); |
| 417 | } |
| 418 | |
Theodore Ts'o | 7c2e708 | 2011-09-09 18:28:51 -0400 | [diff] [blame] | 419 | /* |
| 420 | * The del_gendisk() function uninitializes the disk-specific data |
| 421 | * structures, including the bdi structure, without telling anyone |
| 422 | * else. Once this happens, any attempt to call mark_buffer_dirty() |
| 423 | * (for example, by ext4_commit_super), will cause a kernel OOPS. |
| 424 | * This is a kludge to prevent these oops until we can put in a proper |
| 425 | * hook in del_gendisk() to inform the VFS and file system layers. |
| 426 | */ |
| 427 | static int block_device_ejected(struct super_block *sb) |
| 428 | { |
| 429 | struct inode *bd_inode = sb->s_bdev->bd_inode; |
| 430 | struct backing_dev_info *bdi = bd_inode->i_mapping->backing_dev_info; |
| 431 | |
| 432 | return bdi->dev == NULL; |
| 433 | } |
| 434 | |
Bobi Jam | 18aadd4 | 2012-02-20 17:53:02 -0500 | [diff] [blame] | 435 | static void ext4_journal_commit_callback(journal_t *journal, transaction_t *txn) |
| 436 | { |
| 437 | struct super_block *sb = journal->j_private; |
| 438 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
| 439 | int error = is_journal_aborted(journal); |
| 440 | struct ext4_journal_cb_entry *jce, *tmp; |
| 441 | |
| 442 | spin_lock(&sbi->s_md_lock); |
| 443 | list_for_each_entry_safe(jce, tmp, &txn->t_private_list, jce_list) { |
| 444 | list_del_init(&jce->jce_list); |
| 445 | spin_unlock(&sbi->s_md_lock); |
| 446 | jce->jce_func(sb, jce, error); |
| 447 | spin_lock(&sbi->s_md_lock); |
| 448 | } |
| 449 | spin_unlock(&sbi->s_md_lock); |
| 450 | } |
Theodore Ts'o | 1c13d5c | 2010-07-27 11:56:03 -0400 | [diff] [blame] | 451 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 452 | /* Deal with the reporting of failure conditions on a filesystem such as |
| 453 | * inconsistencies detected or read IO failures. |
| 454 | * |
| 455 | * 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] | 456 | * superblock. That is not possible on ext4, because we may have other |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 457 | * write ordering constraints on the superblock which prevent us from |
| 458 | * writing it out straight away; and given that the journal is about to |
| 459 | * be aborted, we can't rely on the current, or future, transactions to |
| 460 | * write out the superblock safely. |
| 461 | * |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 462 | * 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] | 463 | * the journal instead. On recovery, the journal will complain about |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 464 | * that error until we've noted it down and cleared it. |
| 465 | */ |
| 466 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 467 | static void ext4_handle_error(struct super_block *sb) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 468 | { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 469 | if (sb->s_flags & MS_RDONLY) |
| 470 | return; |
| 471 | |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 472 | if (!test_opt(sb, ERRORS_CONT)) { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 473 | journal_t *journal = EXT4_SB(sb)->s_journal; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 474 | |
Theodore Ts'o | 4ab2f15 | 2009-06-13 10:09:36 -0400 | [diff] [blame] | 475 | EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 476 | if (journal) |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 477 | jbd2_journal_abort(journal, -EIO); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 478 | } |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 479 | if (test_opt(sb, ERRORS_RO)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 480 | ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 481 | sb->s_flags |= MS_RDONLY; |
| 482 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 483 | if (test_opt(sb, ERRORS_PANIC)) |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 484 | panic("EXT4-fs (device %s): panic forced after error\n", |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 485 | sb->s_id); |
| 486 | } |
| 487 | |
Eric Sandeen | 12062dd | 2010-02-15 14:19:27 -0500 | [diff] [blame] | 488 | void __ext4_error(struct super_block *sb, const char *function, |
Theodore Ts'o | c398eda | 2010-07-27 11:56:40 -0400 | [diff] [blame] | 489 | unsigned int line, const char *fmt, ...) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 490 | { |
Joe Perches | 0ff2ea7 | 2010-12-19 22:43:19 -0500 | [diff] [blame] | 491 | struct va_format vaf; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 492 | va_list args; |
| 493 | |
| 494 | va_start(args, fmt); |
Joe Perches | 0ff2ea7 | 2010-12-19 22:43:19 -0500 | [diff] [blame] | 495 | vaf.fmt = fmt; |
| 496 | vaf.va = &args; |
| 497 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: comm %s: %pV\n", |
| 498 | sb->s_id, function, line, current->comm, &vaf); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 499 | va_end(args); |
| 500 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 501 | ext4_handle_error(sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 502 | } |
| 503 | |
Theodore Ts'o | c398eda | 2010-07-27 11:56:40 -0400 | [diff] [blame] | 504 | void ext4_error_inode(struct inode *inode, const char *function, |
| 505 | unsigned int line, ext4_fsblk_t block, |
Frank Mayhar | 273df55 | 2010-03-02 11:46:09 -0500 | [diff] [blame] | 506 | const char *fmt, ...) |
| 507 | { |
| 508 | va_list args; |
Theodore Ts'o | f7c2117 | 2011-01-10 12:10:55 -0500 | [diff] [blame] | 509 | struct va_format vaf; |
Theodore Ts'o | 1c13d5c | 2010-07-27 11:56:03 -0400 | [diff] [blame] | 510 | struct ext4_super_block *es = EXT4_SB(inode->i_sb)->s_es; |
Frank Mayhar | 273df55 | 2010-03-02 11:46:09 -0500 | [diff] [blame] | 511 | |
Theodore Ts'o | 1c13d5c | 2010-07-27 11:56:03 -0400 | [diff] [blame] | 512 | es->s_last_error_ino = cpu_to_le32(inode->i_ino); |
| 513 | es->s_last_error_block = cpu_to_le64(block); |
| 514 | save_error_info(inode->i_sb, function, line); |
Frank Mayhar | 273df55 | 2010-03-02 11:46:09 -0500 | [diff] [blame] | 515 | va_start(args, fmt); |
Theodore Ts'o | f7c2117 | 2011-01-10 12:10:55 -0500 | [diff] [blame] | 516 | vaf.fmt = fmt; |
| 517 | vaf.va = &args; |
Theodore Ts'o | c398eda | 2010-07-27 11:56:40 -0400 | [diff] [blame] | 518 | if (block) |
Joe Perches | d9ee81d | 2012-03-19 23:15:43 -0400 | [diff] [blame] | 519 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " |
| 520 | "inode #%lu: block %llu: comm %s: %pV\n", |
| 521 | inode->i_sb->s_id, function, line, inode->i_ino, |
| 522 | block, current->comm, &vaf); |
| 523 | else |
| 524 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " |
| 525 | "inode #%lu: comm %s: %pV\n", |
| 526 | inode->i_sb->s_id, function, line, inode->i_ino, |
| 527 | current->comm, &vaf); |
Frank Mayhar | 273df55 | 2010-03-02 11:46:09 -0500 | [diff] [blame] | 528 | va_end(args); |
| 529 | |
| 530 | ext4_handle_error(inode->i_sb); |
| 531 | } |
| 532 | |
Theodore Ts'o | c398eda | 2010-07-27 11:56:40 -0400 | [diff] [blame] | 533 | void ext4_error_file(struct file *file, const char *function, |
Theodore Ts'o | f7c2117 | 2011-01-10 12:10:55 -0500 | [diff] [blame] | 534 | unsigned int line, ext4_fsblk_t block, |
| 535 | const char *fmt, ...) |
Frank Mayhar | 273df55 | 2010-03-02 11:46:09 -0500 | [diff] [blame] | 536 | { |
| 537 | va_list args; |
Theodore Ts'o | f7c2117 | 2011-01-10 12:10:55 -0500 | [diff] [blame] | 538 | struct va_format vaf; |
Theodore Ts'o | 1c13d5c | 2010-07-27 11:56:03 -0400 | [diff] [blame] | 539 | struct ext4_super_block *es; |
Frank Mayhar | 273df55 | 2010-03-02 11:46:09 -0500 | [diff] [blame] | 540 | struct inode *inode = file->f_dentry->d_inode; |
| 541 | char pathname[80], *path; |
| 542 | |
Theodore Ts'o | 1c13d5c | 2010-07-27 11:56:03 -0400 | [diff] [blame] | 543 | es = EXT4_SB(inode->i_sb)->s_es; |
| 544 | es->s_last_error_ino = cpu_to_le32(inode->i_ino); |
| 545 | save_error_info(inode->i_sb, function, line); |
Frank Mayhar | 273df55 | 2010-03-02 11:46:09 -0500 | [diff] [blame] | 546 | path = d_path(&(file->f_path), pathname, sizeof(pathname)); |
Dan Carpenter | f9a62d0 | 2011-01-10 12:10:50 -0500 | [diff] [blame] | 547 | if (IS_ERR(path)) |
Frank Mayhar | 273df55 | 2010-03-02 11:46:09 -0500 | [diff] [blame] | 548 | path = "(unknown)"; |
Theodore Ts'o | f7c2117 | 2011-01-10 12:10:55 -0500 | [diff] [blame] | 549 | va_start(args, fmt); |
| 550 | vaf.fmt = fmt; |
| 551 | vaf.va = &args; |
Joe Perches | d9ee81d | 2012-03-19 23:15:43 -0400 | [diff] [blame] | 552 | if (block) |
| 553 | printk(KERN_CRIT |
| 554 | "EXT4-fs error (device %s): %s:%d: inode #%lu: " |
| 555 | "block %llu: comm %s: path %s: %pV\n", |
| 556 | inode->i_sb->s_id, function, line, inode->i_ino, |
| 557 | block, current->comm, path, &vaf); |
| 558 | else |
| 559 | printk(KERN_CRIT |
| 560 | "EXT4-fs error (device %s): %s:%d: inode #%lu: " |
| 561 | "comm %s: path %s: %pV\n", |
| 562 | inode->i_sb->s_id, function, line, inode->i_ino, |
| 563 | current->comm, path, &vaf); |
Frank Mayhar | 273df55 | 2010-03-02 11:46:09 -0500 | [diff] [blame] | 564 | va_end(args); |
| 565 | |
| 566 | ext4_handle_error(inode->i_sb); |
| 567 | } |
| 568 | |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 569 | static const char *ext4_decode_error(struct super_block *sb, int errno, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 570 | char nbuf[16]) |
| 571 | { |
| 572 | char *errstr = NULL; |
| 573 | |
| 574 | switch (errno) { |
| 575 | case -EIO: |
| 576 | errstr = "IO failure"; |
| 577 | break; |
| 578 | case -ENOMEM: |
| 579 | errstr = "Out of memory"; |
| 580 | break; |
| 581 | case -EROFS: |
Theodore Ts'o | 78f1ddb | 2009-07-27 23:09:47 -0400 | [diff] [blame] | 582 | if (!sb || (EXT4_SB(sb)->s_journal && |
| 583 | EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 584 | errstr = "Journal has aborted"; |
| 585 | else |
| 586 | errstr = "Readonly filesystem"; |
| 587 | break; |
| 588 | default: |
| 589 | /* If the caller passed in an extra buffer for unknown |
| 590 | * errors, textualise them now. Else we just return |
| 591 | * NULL. */ |
| 592 | if (nbuf) { |
| 593 | /* Check for truncated error codes... */ |
| 594 | if (snprintf(nbuf, 16, "error %d", -errno) >= 0) |
| 595 | errstr = nbuf; |
| 596 | } |
| 597 | break; |
| 598 | } |
| 599 | |
| 600 | return errstr; |
| 601 | } |
| 602 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 603 | /* __ext4_std_error decodes expected errors from journaling functions |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 604 | * automatically and invokes the appropriate error response. */ |
| 605 | |
Theodore Ts'o | c398eda | 2010-07-27 11:56:40 -0400 | [diff] [blame] | 606 | void __ext4_std_error(struct super_block *sb, const char *function, |
| 607 | unsigned int line, int errno) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 608 | { |
| 609 | char nbuf[16]; |
| 610 | const char *errstr; |
| 611 | |
| 612 | /* Special case: if the error is EROFS, and we're not already |
| 613 | * inside a transaction, then there's really no point in logging |
| 614 | * an error. */ |
| 615 | if (errno == -EROFS && journal_current_handle() == NULL && |
| 616 | (sb->s_flags & MS_RDONLY)) |
| 617 | return; |
| 618 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 619 | errstr = ext4_decode_error(sb, errno, nbuf); |
Theodore Ts'o | c398eda | 2010-07-27 11:56:40 -0400 | [diff] [blame] | 620 | printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n", |
| 621 | sb->s_id, function, line, errstr); |
Theodore Ts'o | 1c13d5c | 2010-07-27 11:56:03 -0400 | [diff] [blame] | 622 | save_error_info(sb, function, line); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 623 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 624 | ext4_handle_error(sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 625 | } |
| 626 | |
| 627 | /* |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 628 | * ext4_abort is a much stronger failure handler than ext4_error. The |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 629 | * abort function may be used to deal with unrecoverable failures such |
| 630 | * as journal IO errors or ENOMEM at a critical moment in log management. |
| 631 | * |
| 632 | * We unconditionally force the filesystem into an ABORT|READONLY state, |
| 633 | * unless the error response on the fs has been set to panic in which |
| 634 | * case we take the easy way out and panic immediately. |
| 635 | */ |
| 636 | |
Theodore Ts'o | c67d859 | 2010-06-29 11:07:07 -0400 | [diff] [blame] | 637 | void __ext4_abort(struct super_block *sb, const char *function, |
Theodore Ts'o | c398eda | 2010-07-27 11:56:40 -0400 | [diff] [blame] | 638 | unsigned int line, const char *fmt, ...) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 639 | { |
| 640 | va_list args; |
| 641 | |
Theodore Ts'o | 1c13d5c | 2010-07-27 11:56:03 -0400 | [diff] [blame] | 642 | save_error_info(sb, function, line); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 643 | va_start(args, fmt); |
Theodore Ts'o | c398eda | 2010-07-27 11:56:40 -0400 | [diff] [blame] | 644 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: ", sb->s_id, |
| 645 | function, line); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 646 | vprintk(fmt, args); |
| 647 | printk("\n"); |
| 648 | va_end(args); |
| 649 | |
Theodore Ts'o | 1c13d5c | 2010-07-27 11:56:03 -0400 | [diff] [blame] | 650 | if ((sb->s_flags & MS_RDONLY) == 0) { |
| 651 | ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); |
| 652 | sb->s_flags |= MS_RDONLY; |
| 653 | EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; |
| 654 | if (EXT4_SB(sb)->s_journal) |
| 655 | jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); |
| 656 | save_error_info(sb, function, line); |
| 657 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 658 | if (test_opt(sb, ERRORS_PANIC)) |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 659 | panic("EXT4-fs panic from previous error\n"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 660 | } |
| 661 | |
Joe Perches | 0ff2ea7 | 2010-12-19 22:43:19 -0500 | [diff] [blame] | 662 | void ext4_msg(struct super_block *sb, const char *prefix, const char *fmt, ...) |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 663 | { |
Joe Perches | 0ff2ea7 | 2010-12-19 22:43:19 -0500 | [diff] [blame] | 664 | struct va_format vaf; |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 665 | va_list args; |
| 666 | |
| 667 | va_start(args, fmt); |
Joe Perches | 0ff2ea7 | 2010-12-19 22:43:19 -0500 | [diff] [blame] | 668 | vaf.fmt = fmt; |
| 669 | vaf.va = &args; |
| 670 | printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf); |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 671 | va_end(args); |
| 672 | } |
| 673 | |
Eric Sandeen | 12062dd | 2010-02-15 14:19:27 -0500 | [diff] [blame] | 674 | void __ext4_warning(struct super_block *sb, const char *function, |
Theodore Ts'o | c398eda | 2010-07-27 11:56:40 -0400 | [diff] [blame] | 675 | unsigned int line, const char *fmt, ...) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 676 | { |
Joe Perches | 0ff2ea7 | 2010-12-19 22:43:19 -0500 | [diff] [blame] | 677 | struct va_format vaf; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 678 | va_list args; |
| 679 | |
| 680 | va_start(args, fmt); |
Joe Perches | 0ff2ea7 | 2010-12-19 22:43:19 -0500 | [diff] [blame] | 681 | vaf.fmt = fmt; |
| 682 | vaf.va = &args; |
| 683 | printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n", |
| 684 | sb->s_id, function, line, &vaf); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 685 | va_end(args); |
| 686 | } |
| 687 | |
Theodore Ts'o | e29136f | 2010-06-29 12:54:28 -0400 | [diff] [blame] | 688 | void __ext4_grp_locked_error(const char *function, unsigned int line, |
| 689 | struct super_block *sb, ext4_group_t grp, |
| 690 | unsigned long ino, ext4_fsblk_t block, |
| 691 | const char *fmt, ...) |
Aneesh Kumar K.V | 5d1b1b3 | 2009-01-05 22:19:52 -0500 | [diff] [blame] | 692 | __releases(bitlock) |
| 693 | __acquires(bitlock) |
| 694 | { |
Joe Perches | 0ff2ea7 | 2010-12-19 22:43:19 -0500 | [diff] [blame] | 695 | struct va_format vaf; |
Aneesh Kumar K.V | 5d1b1b3 | 2009-01-05 22:19:52 -0500 | [diff] [blame] | 696 | va_list args; |
| 697 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
| 698 | |
Theodore Ts'o | 1c13d5c | 2010-07-27 11:56:03 -0400 | [diff] [blame] | 699 | es->s_last_error_ino = cpu_to_le32(ino); |
| 700 | es->s_last_error_block = cpu_to_le64(block); |
| 701 | __save_error_info(sb, function, line); |
Joe Perches | 0ff2ea7 | 2010-12-19 22:43:19 -0500 | [diff] [blame] | 702 | |
Aneesh Kumar K.V | 5d1b1b3 | 2009-01-05 22:19:52 -0500 | [diff] [blame] | 703 | va_start(args, fmt); |
Joe Perches | 0ff2ea7 | 2010-12-19 22:43:19 -0500 | [diff] [blame] | 704 | |
| 705 | vaf.fmt = fmt; |
| 706 | vaf.va = &args; |
Robin Dong | 21149d6 | 2011-03-21 20:39:22 -0400 | [diff] [blame] | 707 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u, ", |
Theodore Ts'o | e29136f | 2010-06-29 12:54:28 -0400 | [diff] [blame] | 708 | sb->s_id, function, line, grp); |
| 709 | if (ino) |
Joe Perches | 0ff2ea7 | 2010-12-19 22:43:19 -0500 | [diff] [blame] | 710 | printk(KERN_CONT "inode %lu: ", ino); |
Theodore Ts'o | e29136f | 2010-06-29 12:54:28 -0400 | [diff] [blame] | 711 | if (block) |
Joe Perches | 0ff2ea7 | 2010-12-19 22:43:19 -0500 | [diff] [blame] | 712 | printk(KERN_CONT "block %llu:", (unsigned long long) block); |
| 713 | printk(KERN_CONT "%pV\n", &vaf); |
Aneesh Kumar K.V | 5d1b1b3 | 2009-01-05 22:19:52 -0500 | [diff] [blame] | 714 | va_end(args); |
| 715 | |
| 716 | if (test_opt(sb, ERRORS_CONT)) { |
Theodore Ts'o | e2d6705 | 2009-05-01 00:33:44 -0400 | [diff] [blame] | 717 | ext4_commit_super(sb, 0); |
Aneesh Kumar K.V | 5d1b1b3 | 2009-01-05 22:19:52 -0500 | [diff] [blame] | 718 | return; |
| 719 | } |
Theodore Ts'o | 1c13d5c | 2010-07-27 11:56:03 -0400 | [diff] [blame] | 720 | |
Aneesh Kumar K.V | 5d1b1b3 | 2009-01-05 22:19:52 -0500 | [diff] [blame] | 721 | ext4_unlock_group(sb, grp); |
| 722 | ext4_handle_error(sb); |
| 723 | /* |
| 724 | * We only get here in the ERRORS_RO case; relocking the group |
| 725 | * may be dangerous, but nothing bad will happen since the |
| 726 | * filesystem will have already been marked read/only and the |
| 727 | * journal has been aborted. We return 1 as a hint to callers |
| 728 | * who might what to use the return value from |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 729 | * ext4_grp_locked_error() to distinguish between the |
Aneesh Kumar K.V | 5d1b1b3 | 2009-01-05 22:19:52 -0500 | [diff] [blame] | 730 | * ERRORS_CONT and ERRORS_RO case, and perhaps return more |
| 731 | * aggressively from the ext4 function in question, with a |
| 732 | * more appropriate error code. |
| 733 | */ |
| 734 | ext4_lock_group(sb, grp); |
| 735 | return; |
| 736 | } |
| 737 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 738 | void ext4_update_dynamic_rev(struct super_block *sb) |
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 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 741 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 742 | if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 743 | return; |
| 744 | |
Eric Sandeen | 12062dd | 2010-02-15 14:19:27 -0500 | [diff] [blame] | 745 | ext4_warning(sb, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 746 | "updating to rev %d because of new feature flag, " |
| 747 | "running e2fsck is recommended", |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 748 | EXT4_DYNAMIC_REV); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 749 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 750 | es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); |
| 751 | es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); |
| 752 | es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 753 | /* leave es->s_feature_*compat flags alone */ |
| 754 | /* es->s_uuid will be set by e2fsck if empty */ |
| 755 | |
| 756 | /* |
| 757 | * The rest of the superblock fields should be zero, and if not it |
| 758 | * means they are likely already in use, so leave them alone. We |
| 759 | * can leave it up to e2fsck to clean up any inconsistencies there. |
| 760 | */ |
| 761 | } |
| 762 | |
| 763 | /* |
| 764 | * Open the external journal device |
| 765 | */ |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 766 | 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] | 767 | { |
| 768 | struct block_device *bdev; |
| 769 | char b[BDEVNAME_SIZE]; |
| 770 | |
Tejun Heo | d4d7762 | 2010-11-13 11:55:18 +0100 | [diff] [blame] | 771 | 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] | 772 | if (IS_ERR(bdev)) |
| 773 | goto fail; |
| 774 | return bdev; |
| 775 | |
| 776 | fail: |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 777 | ext4_msg(sb, KERN_ERR, "failed to open journal device %s: %ld", |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 778 | __bdevname(dev, b), PTR_ERR(bdev)); |
| 779 | return NULL; |
| 780 | } |
| 781 | |
| 782 | /* |
| 783 | * Release the journal device |
| 784 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 785 | static int ext4_blkdev_put(struct block_device *bdev) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 786 | { |
Tejun Heo | e525fd8 | 2010-11-13 11:55:17 +0100 | [diff] [blame] | 787 | return blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 788 | } |
| 789 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 790 | static int ext4_blkdev_remove(struct ext4_sb_info *sbi) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 791 | { |
| 792 | struct block_device *bdev; |
| 793 | int ret = -ENODEV; |
| 794 | |
| 795 | bdev = sbi->journal_bdev; |
| 796 | if (bdev) { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 797 | ret = ext4_blkdev_put(bdev); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 798 | sbi->journal_bdev = NULL; |
| 799 | } |
| 800 | return ret; |
| 801 | } |
| 802 | |
| 803 | static inline struct inode *orphan_list_entry(struct list_head *l) |
| 804 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 805 | return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 806 | } |
| 807 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 808 | 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] | 809 | { |
| 810 | struct list_head *l; |
| 811 | |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 812 | ext4_msg(sb, KERN_ERR, "sb orphan head is %d", |
| 813 | le32_to_cpu(sbi->s_es->s_last_orphan)); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 814 | |
| 815 | printk(KERN_ERR "sb_info orphan list:\n"); |
| 816 | list_for_each(l, &sbi->s_orphan) { |
| 817 | struct inode *inode = orphan_list_entry(l); |
| 818 | printk(KERN_ERR " " |
| 819 | "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", |
| 820 | inode->i_sb->s_id, inode->i_ino, inode, |
| 821 | inode->i_mode, inode->i_nlink, |
| 822 | NEXT_ORPHAN(inode)); |
| 823 | } |
| 824 | } |
| 825 | |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 826 | static void ext4_put_super(struct super_block *sb) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 827 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 828 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
| 829 | struct ext4_super_block *es = sbi->s_es; |
Hidehiro Kawai | ef2cabf | 2008-10-27 22:53:05 -0400 | [diff] [blame] | 830 | int i, err; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 831 | |
Lukas Czerner | 857ac88 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 832 | ext4_unregister_li_request(sb); |
Christoph Hellwig | e0ccfd9 | 2010-05-19 07:16:42 -0400 | [diff] [blame] | 833 | dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); |
| 834 | |
Mingming Cao | 4c0425f | 2009-09-28 15:48:41 -0400 | [diff] [blame] | 835 | flush_workqueue(sbi->dio_unwritten_wq); |
| 836 | destroy_workqueue(sbi->dio_unwritten_wq); |
| 837 | |
Al Viro | a9e220f | 2009-05-05 22:10:44 -0400 | [diff] [blame] | 838 | lock_super(sb); |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 839 | if (sbi->s_journal) { |
| 840 | err = jbd2_journal_destroy(sbi->s_journal); |
| 841 | sbi->s_journal = NULL; |
| 842 | if (err < 0) |
Theodore Ts'o | c67d859 | 2010-06-29 11:07:07 -0400 | [diff] [blame] | 843 | ext4_abort(sb, "Couldn't clean up the journal"); |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 844 | } |
Josef Bacik | d4edac3 | 2009-12-08 21:48:58 -0500 | [diff] [blame] | 845 | |
Sergey Senozhatsky | a1c6c56 | 2010-10-27 21:30:04 -0400 | [diff] [blame] | 846 | del_timer(&sbi->s_err_report); |
Josef Bacik | d4edac3 | 2009-12-08 21:48:58 -0500 | [diff] [blame] | 847 | ext4_release_system_zone(sb); |
| 848 | ext4_mb_release(sb); |
| 849 | ext4_ext_release(sb); |
| 850 | ext4_xattr_put_super(sb); |
| 851 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 852 | if (!(sb->s_flags & MS_RDONLY)) { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 853 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 854 | es->s_state = cpu_to_le16(sbi->s_mount_state); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 855 | } |
Artem Bityutskiy | a8e25a8 | 2012-03-21 22:29:15 -0400 | [diff] [blame] | 856 | if (sb->s_dirt || !(sb->s_flags & MS_RDONLY)) |
| 857 | ext4_commit_super(sb, 1); |
| 858 | |
Theodore Ts'o | 240799c | 2008-10-09 23:53:47 -0400 | [diff] [blame] | 859 | if (sbi->s_proc) { |
Theodore Ts'o | 66acdcf | 2012-03-04 20:21:38 -0500 | [diff] [blame] | 860 | remove_proc_entry("options", sbi->s_proc); |
Theodore Ts'o | 9f6200b | 2008-09-23 09:18:24 -0400 | [diff] [blame] | 861 | remove_proc_entry(sb->s_id, ext4_proc_root); |
Theodore Ts'o | 240799c | 2008-10-09 23:53:47 -0400 | [diff] [blame] | 862 | } |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 863 | kobject_del(&sbi->s_kobj); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 864 | |
| 865 | for (i = 0; i < sbi->s_gdb_count; i++) |
| 866 | brelse(sbi->s_group_desc[i]); |
Theodore Ts'o | f18a5f2 | 2011-08-01 08:45:38 -0400 | [diff] [blame] | 867 | ext4_kvfree(sbi->s_group_desc); |
Theodore Ts'o | 9933fc0 | 2011-08-01 08:45:02 -0400 | [diff] [blame] | 868 | ext4_kvfree(sbi->s_flex_groups); |
Theodore Ts'o | 5704265 | 2011-09-09 18:56:51 -0400 | [diff] [blame] | 869 | percpu_counter_destroy(&sbi->s_freeclusters_counter); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 870 | percpu_counter_destroy(&sbi->s_freeinodes_counter); |
| 871 | percpu_counter_destroy(&sbi->s_dirs_counter); |
Theodore Ts'o | 5704265 | 2011-09-09 18:56:51 -0400 | [diff] [blame] | 872 | percpu_counter_destroy(&sbi->s_dirtyclusters_counter); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 873 | brelse(sbi->s_sbh); |
| 874 | #ifdef CONFIG_QUOTA |
| 875 | for (i = 0; i < MAXQUOTAS; i++) |
| 876 | kfree(sbi->s_qf_names[i]); |
| 877 | #endif |
| 878 | |
| 879 | /* Debugging code just in case the in-memory inode orphan list |
| 880 | * isn't empty. The on-disk one can be non-empty if we've |
| 881 | * detected an error and taken the fs readonly, but the |
| 882 | * in-memory list had better be clean by this point. */ |
| 883 | if (!list_empty(&sbi->s_orphan)) |
| 884 | dump_orphan_list(sb, sbi); |
| 885 | J_ASSERT(list_empty(&sbi->s_orphan)); |
| 886 | |
Peter Zijlstra | f98393a | 2007-05-06 14:49:54 -0700 | [diff] [blame] | 887 | invalidate_bdev(sb->s_bdev); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 888 | if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { |
| 889 | /* |
| 890 | * Invalidate the journal device's buffers. We don't want them |
| 891 | * floating about in memory - the physical journal device may |
| 892 | * hotswapped, and it breaks the `ro-after' testing code. |
| 893 | */ |
| 894 | sync_blockdev(sbi->journal_bdev); |
Peter Zijlstra | f98393a | 2007-05-06 14:49:54 -0700 | [diff] [blame] | 895 | invalidate_bdev(sbi->journal_bdev); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 896 | ext4_blkdev_remove(sbi); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 897 | } |
Johann Lombardi | c5e06d1 | 2011-05-24 18:31:25 -0400 | [diff] [blame] | 898 | if (sbi->s_mmp_tsk) |
| 899 | kthread_stop(sbi->s_mmp_tsk); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 900 | sb->s_fs_info = NULL; |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 901 | /* |
| 902 | * Now that we are completely done shutting down the |
| 903 | * superblock, we need to actually destroy the kobject. |
| 904 | */ |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 905 | unlock_super(sb); |
| 906 | kobject_put(&sbi->s_kobj); |
| 907 | wait_for_completion(&sbi->s_kobj_unregister); |
Pekka Enberg | 705895b | 2009-02-15 18:07:52 -0500 | [diff] [blame] | 908 | kfree(sbi->s_blockgroup_lock); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 909 | kfree(sbi); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 910 | } |
| 911 | |
Christoph Lameter | e18b890 | 2006-12-06 20:33:20 -0800 | [diff] [blame] | 912 | static struct kmem_cache *ext4_inode_cachep; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 913 | |
| 914 | /* |
| 915 | * Called inside transaction, so use GFP_NOFS |
| 916 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 917 | static struct inode *ext4_alloc_inode(struct super_block *sb) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 918 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 919 | struct ext4_inode_info *ei; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 920 | |
Christoph Lameter | e6b4f8d | 2006-12-06 20:33:14 -0800 | [diff] [blame] | 921 | ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 922 | if (!ei) |
| 923 | return NULL; |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 924 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 925 | ei->vfs_inode.i_version = 1; |
Aneesh Kumar K.V | 91246c0 | 2008-08-19 21:14:52 -0400 | [diff] [blame] | 926 | ei->vfs_inode.i_data.writeback_index = 0; |
Alex Tomas | a86c618 | 2006-10-11 01:21:03 -0700 | [diff] [blame] | 927 | memset(&ei->i_cached_extent, 0, sizeof(struct ext4_ext_cache)); |
Alex Tomas | c9de560 | 2008-01-29 00:19:52 -0500 | [diff] [blame] | 928 | INIT_LIST_HEAD(&ei->i_prealloc_list); |
| 929 | spin_lock_init(&ei->i_prealloc_lock); |
Mingming Cao | d2a1763 | 2008-07-14 17:52:37 -0400 | [diff] [blame] | 930 | ei->i_reserved_data_blocks = 0; |
| 931 | ei->i_reserved_meta_blocks = 0; |
| 932 | ei->i_allocated_meta_blocks = 0; |
Theodore Ts'o | 9d0be50 | 2010-01-01 02:41:30 -0500 | [diff] [blame] | 933 | ei->i_da_metadata_calc_len = 0; |
Mingming Cao | d2a1763 | 2008-07-14 17:52:37 -0400 | [diff] [blame] | 934 | spin_lock_init(&(ei->i_block_reservation_lock)); |
Dmitry Monakhov | a9e7f44 | 2009-12-14 15:21:14 +0300 | [diff] [blame] | 935 | #ifdef CONFIG_QUOTA |
| 936 | ei->i_reserved_quota = 0; |
| 937 | #endif |
Theodore Ts'o | 8aefcd5 | 2011-01-10 12:29:43 -0500 | [diff] [blame] | 938 | ei->jinode = NULL; |
Jiaying Zhang | c7064ef | 2010-03-02 13:28:44 -0500 | [diff] [blame] | 939 | INIT_LIST_HEAD(&ei->i_completed_io_list); |
Jiaying Zhang | 744692d | 2010-03-04 16:14:02 -0500 | [diff] [blame] | 940 | spin_lock_init(&ei->i_completed_io_lock); |
Mingming Cao | 8d5d02e | 2009-09-28 15:48:29 -0400 | [diff] [blame] | 941 | ei->cur_aio_dio = NULL; |
Jan Kara | b436b9b | 2009-12-08 23:51:10 -0500 | [diff] [blame] | 942 | ei->i_sync_tid = 0; |
| 943 | ei->i_datasync_tid = 0; |
Theodore Ts'o | f7ad6d2 | 2010-11-08 13:43:33 -0500 | [diff] [blame] | 944 | atomic_set(&ei->i_ioend_count, 0); |
Eric Sandeen | e9e3bce | 2011-02-12 08:17:34 -0500 | [diff] [blame] | 945 | atomic_set(&ei->i_aiodio_unwritten, 0); |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 946 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 947 | return &ei->vfs_inode; |
| 948 | } |
| 949 | |
Theodore Ts'o | 7ff9c07 | 2010-11-08 13:51:33 -0500 | [diff] [blame] | 950 | static int ext4_drop_inode(struct inode *inode) |
| 951 | { |
| 952 | int drop = generic_drop_inode(inode); |
| 953 | |
| 954 | trace_ext4_drop_inode(inode, drop); |
| 955 | return drop; |
| 956 | } |
| 957 | |
Nick Piggin | fa0d7e3d | 2011-01-07 17:49:49 +1100 | [diff] [blame] | 958 | static void ext4_i_callback(struct rcu_head *head) |
| 959 | { |
| 960 | struct inode *inode = container_of(head, struct inode, i_rcu); |
Nick Piggin | fa0d7e3d | 2011-01-07 17:49:49 +1100 | [diff] [blame] | 961 | kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); |
| 962 | } |
| 963 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 964 | static void ext4_destroy_inode(struct inode *inode) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 965 | { |
Vasily Averin | 9f7dd93 | 2007-07-15 23:40:45 -0700 | [diff] [blame] | 966 | if (!list_empty(&(EXT4_I(inode)->i_orphan))) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 967 | ext4_msg(inode->i_sb, KERN_ERR, |
| 968 | "Inode %lu (%p): orphan list check failed!", |
| 969 | inode->i_ino, EXT4_I(inode)); |
Vasily Averin | 9f7dd93 | 2007-07-15 23:40:45 -0700 | [diff] [blame] | 970 | print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, |
| 971 | EXT4_I(inode), sizeof(struct ext4_inode_info), |
| 972 | true); |
| 973 | dump_stack(); |
| 974 | } |
Nick Piggin | fa0d7e3d | 2011-01-07 17:49:49 +1100 | [diff] [blame] | 975 | call_rcu(&inode->i_rcu, ext4_i_callback); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 976 | } |
| 977 | |
Alexey Dobriyan | 51cc506 | 2008-07-25 19:45:34 -0700 | [diff] [blame] | 978 | static void init_once(void *foo) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 979 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 980 | struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 981 | |
Christoph Lameter | a35afb8 | 2007-05-16 22:10:57 -0700 | [diff] [blame] | 982 | INIT_LIST_HEAD(&ei->i_orphan); |
Theodore Ts'o | 03010a3 | 2008-10-10 20:02:48 -0400 | [diff] [blame] | 983 | #ifdef CONFIG_EXT4_FS_XATTR |
Christoph Lameter | a35afb8 | 2007-05-16 22:10:57 -0700 | [diff] [blame] | 984 | init_rwsem(&ei->xattr_sem); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 985 | #endif |
Aneesh Kumar K.V | 0e855ac | 2008-01-28 23:58:26 -0500 | [diff] [blame] | 986 | init_rwsem(&ei->i_data_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 | |
| 990 | static int init_inodecache(void) |
| 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| |
| 995 | SLAB_MEM_SPREAD), |
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 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1004 | kmem_cache_destroy(ext4_inode_cachep); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1005 | } |
| 1006 | |
Al Viro | 0930fcc | 2010-06-07 13:16:22 -0400 | [diff] [blame] | 1007 | void ext4_clear_inode(struct inode *inode) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1008 | { |
Al Viro | 0930fcc | 2010-06-07 13:16:22 -0400 | [diff] [blame] | 1009 | invalidate_inode_buffers(inode); |
| 1010 | end_writeback(inode); |
Christoph Hellwig | 9f75475 | 2010-03-03 09:05:05 -0500 | [diff] [blame] | 1011 | dquot_drop(inode); |
Theodore Ts'o | c2ea3fd | 2008-10-10 09:40:52 -0400 | [diff] [blame] | 1012 | ext4_discard_preallocations(inode); |
Theodore Ts'o | 8aefcd5 | 2011-01-10 12:29:43 -0500 | [diff] [blame] | 1013 | if (EXT4_I(inode)->jinode) { |
| 1014 | jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), |
| 1015 | EXT4_I(inode)->jinode); |
| 1016 | jbd2_free_inode(EXT4_I(inode)->jinode); |
| 1017 | EXT4_I(inode)->jinode = NULL; |
| 1018 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1019 | } |
| 1020 | |
Christoph Hellwig | 1b961ac | 2007-10-21 16:42:08 -0700 | [diff] [blame] | 1021 | static struct inode *ext4_nfs_get_inode(struct super_block *sb, |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 1022 | u64 ino, u32 generation) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1023 | { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1024 | struct inode *inode; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1025 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1026 | if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1027 | return ERR_PTR(-ESTALE); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1028 | 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] | 1029 | return ERR_PTR(-ESTALE); |
| 1030 | |
| 1031 | /* iget isn't really right if the inode is currently unallocated!! |
| 1032 | * |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1033 | * 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] | 1034 | * deleted, so we should be safe. |
| 1035 | * |
| 1036 | * Currently we don't know the generation for parent directory, so |
| 1037 | * a generation of 0 means "accept any" |
| 1038 | */ |
David Howells | 1d1fe1e | 2008-02-07 00:15:37 -0800 | [diff] [blame] | 1039 | inode = ext4_iget(sb, ino); |
| 1040 | if (IS_ERR(inode)) |
| 1041 | return ERR_CAST(inode); |
| 1042 | if (generation && inode->i_generation != generation) { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1043 | iput(inode); |
| 1044 | return ERR_PTR(-ESTALE); |
| 1045 | } |
Christoph Hellwig | 1b961ac | 2007-10-21 16:42:08 -0700 | [diff] [blame] | 1046 | |
| 1047 | return inode; |
| 1048 | } |
| 1049 | |
| 1050 | 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] | 1051 | int fh_len, int fh_type) |
Christoph Hellwig | 1b961ac | 2007-10-21 16:42:08 -0700 | [diff] [blame] | 1052 | { |
| 1053 | return generic_fh_to_dentry(sb, fid, fh_len, fh_type, |
| 1054 | ext4_nfs_get_inode); |
| 1055 | } |
| 1056 | |
| 1057 | 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] | 1058 | int fh_len, int fh_type) |
Christoph Hellwig | 1b961ac | 2007-10-21 16:42:08 -0700 | [diff] [blame] | 1059 | { |
| 1060 | return generic_fh_to_parent(sb, fid, fh_len, fh_type, |
| 1061 | ext4_nfs_get_inode); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1062 | } |
| 1063 | |
Toshiyuki Okajima | c39a7f8 | 2009-01-05 22:38:48 -0500 | [diff] [blame] | 1064 | /* |
| 1065 | * Try to release metadata pages (indirect blocks, directories) which are |
| 1066 | * mapped via the block device. Since these pages could have journal heads |
| 1067 | * which would prevent try_to_free_buffers() from freeing them, we must use |
| 1068 | * jbd2 layer's try_to_free_buffers() function to release them. |
| 1069 | */ |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 1070 | static int bdev_try_to_free_page(struct super_block *sb, struct page *page, |
| 1071 | gfp_t wait) |
Toshiyuki Okajima | c39a7f8 | 2009-01-05 22:38:48 -0500 | [diff] [blame] | 1072 | { |
| 1073 | journal_t *journal = EXT4_SB(sb)->s_journal; |
| 1074 | |
| 1075 | WARN_ON(PageChecked(page)); |
| 1076 | if (!page_has_buffers(page)) |
| 1077 | return 0; |
| 1078 | if (journal) |
| 1079 | return jbd2_journal_try_to_free_buffers(journal, page, |
| 1080 | wait & ~__GFP_WAIT); |
| 1081 | return try_to_free_buffers(page); |
| 1082 | } |
| 1083 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1084 | #ifdef CONFIG_QUOTA |
Theodore Ts'o | af5bc92 | 2008-09-08 22:25:24 -0400 | [diff] [blame] | 1085 | #define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group") |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 1086 | #define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1087 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1088 | static int ext4_write_dquot(struct dquot *dquot); |
| 1089 | static int ext4_acquire_dquot(struct dquot *dquot); |
| 1090 | static int ext4_release_dquot(struct dquot *dquot); |
| 1091 | static int ext4_mark_dquot_dirty(struct dquot *dquot); |
| 1092 | static int ext4_write_info(struct super_block *sb, int type); |
Jan Kara | 6f28e08 | 2008-04-28 02:14:34 -0700 | [diff] [blame] | 1093 | 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] | 1094 | struct path *path); |
Dmitry Monakhov | ca0e05e | 2010-08-01 17:48:36 -0400 | [diff] [blame] | 1095 | static int ext4_quota_off(struct super_block *sb, int type); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1096 | static int ext4_quota_on_mount(struct super_block *sb, int type); |
| 1097 | 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] | 1098 | size_t len, loff_t off); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1099 | static ssize_t ext4_quota_write(struct super_block *sb, int type, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1100 | const char *data, size_t len, loff_t off); |
| 1101 | |
Alexey Dobriyan | 61e225d | 2009-09-21 17:01:08 -0700 | [diff] [blame] | 1102 | static const struct dquot_operations ext4_quota_operations = { |
Mingming Cao | 60e58e0 | 2009-01-22 18:13:05 +0100 | [diff] [blame] | 1103 | .get_reserved_space = ext4_get_reserved_space, |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1104 | .write_dquot = ext4_write_dquot, |
| 1105 | .acquire_dquot = ext4_acquire_dquot, |
| 1106 | .release_dquot = ext4_release_dquot, |
| 1107 | .mark_dirty = ext4_mark_dquot_dirty, |
Jan Kara | a5b5ee3 | 2008-11-25 15:31:35 +0100 | [diff] [blame] | 1108 | .write_info = ext4_write_info, |
| 1109 | .alloc_dquot = dquot_alloc, |
| 1110 | .destroy_dquot = dquot_destroy, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1111 | }; |
| 1112 | |
Alexey Dobriyan | 0d54b21 | 2009-09-21 17:01:09 -0700 | [diff] [blame] | 1113 | static const struct quotactl_ops ext4_qctl_operations = { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1114 | .quota_on = ext4_quota_on, |
Dmitry Monakhov | ca0e05e | 2010-08-01 17:48:36 -0400 | [diff] [blame] | 1115 | .quota_off = ext4_quota_off, |
Christoph Hellwig | 287a809 | 2010-05-19 07:16:45 -0400 | [diff] [blame] | 1116 | .quota_sync = dquot_quota_sync, |
| 1117 | .get_info = dquot_get_dqinfo, |
| 1118 | .set_info = dquot_set_dqinfo, |
| 1119 | .get_dqblk = dquot_get_dqblk, |
| 1120 | .set_dqblk = dquot_set_dqblk |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1121 | }; |
| 1122 | #endif |
| 1123 | |
Josef 'Jeff' Sipek | ee9b6d6 | 2007-02-12 00:55:41 -0800 | [diff] [blame] | 1124 | static const struct super_operations ext4_sops = { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1125 | .alloc_inode = ext4_alloc_inode, |
| 1126 | .destroy_inode = ext4_destroy_inode, |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1127 | .write_inode = ext4_write_inode, |
| 1128 | .dirty_inode = ext4_dirty_inode, |
Theodore Ts'o | 7ff9c07 | 2010-11-08 13:51:33 -0500 | [diff] [blame] | 1129 | .drop_inode = ext4_drop_inode, |
Al Viro | 0930fcc | 2010-06-07 13:16:22 -0400 | [diff] [blame] | 1130 | .evict_inode = ext4_evict_inode, |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1131 | .put_super = ext4_put_super, |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1132 | .sync_fs = ext4_sync_fs, |
Takashi Sato | c4be0c1 | 2009-01-09 16:40:58 -0800 | [diff] [blame] | 1133 | .freeze_fs = ext4_freeze, |
| 1134 | .unfreeze_fs = ext4_unfreeze, |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1135 | .statfs = ext4_statfs, |
| 1136 | .remount_fs = ext4_remount, |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1137 | .show_options = ext4_show_options, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1138 | #ifdef CONFIG_QUOTA |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1139 | .quota_read = ext4_quota_read, |
| 1140 | .quota_write = ext4_quota_write, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1141 | #endif |
Toshiyuki Okajima | c39a7f8 | 2009-01-05 22:38:48 -0500 | [diff] [blame] | 1142 | .bdev_try_to_free_page = bdev_try_to_free_page, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1143 | }; |
| 1144 | |
Theodore Ts'o | 9ca9238 | 2009-05-01 12:52:25 -0400 | [diff] [blame] | 1145 | static const struct super_operations ext4_nojournal_sops = { |
| 1146 | .alloc_inode = ext4_alloc_inode, |
| 1147 | .destroy_inode = ext4_destroy_inode, |
| 1148 | .write_inode = ext4_write_inode, |
| 1149 | .dirty_inode = ext4_dirty_inode, |
Theodore Ts'o | 7ff9c07 | 2010-11-08 13:51:33 -0500 | [diff] [blame] | 1150 | .drop_inode = ext4_drop_inode, |
Al Viro | 0930fcc | 2010-06-07 13:16:22 -0400 | [diff] [blame] | 1151 | .evict_inode = ext4_evict_inode, |
Theodore Ts'o | 9ca9238 | 2009-05-01 12:52:25 -0400 | [diff] [blame] | 1152 | .write_super = ext4_write_super, |
| 1153 | .put_super = ext4_put_super, |
| 1154 | .statfs = ext4_statfs, |
| 1155 | .remount_fs = ext4_remount, |
Theodore Ts'o | 9ca9238 | 2009-05-01 12:52:25 -0400 | [diff] [blame] | 1156 | .show_options = ext4_show_options, |
| 1157 | #ifdef CONFIG_QUOTA |
| 1158 | .quota_read = ext4_quota_read, |
| 1159 | .quota_write = ext4_quota_write, |
| 1160 | #endif |
| 1161 | .bdev_try_to_free_page = bdev_try_to_free_page, |
| 1162 | }; |
| 1163 | |
Christoph Hellwig | 3965516 | 2007-10-21 16:42:17 -0700 | [diff] [blame] | 1164 | static const struct export_operations ext4_export_ops = { |
Christoph Hellwig | 1b961ac | 2007-10-21 16:42:08 -0700 | [diff] [blame] | 1165 | .fh_to_dentry = ext4_fh_to_dentry, |
| 1166 | .fh_to_parent = ext4_fh_to_parent, |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1167 | .get_parent = ext4_get_parent, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1168 | }; |
| 1169 | |
| 1170 | enum { |
| 1171 | Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, |
| 1172 | 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] | 1173 | Opt_nouid32, Opt_debug, Opt_removed, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1174 | Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, |
Theodore Ts'o | 72578c3 | 2012-03-03 18:04:40 -0500 | [diff] [blame] | 1175 | Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, |
Theodore Ts'o | 3077384 | 2009-01-03 20:27:38 -0500 | [diff] [blame] | 1176 | Opt_commit, Opt_min_batch_time, Opt_max_batch_time, |
Eric Sandeen | 43e625d | 2012-02-20 17:53:04 -0500 | [diff] [blame] | 1177 | Opt_journal_dev, Opt_journal_checksum, Opt_journal_async_commit, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1178 | Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, |
Theodore Ts'o | 296c355 | 2009-09-30 00:32:42 -0400 | [diff] [blame] | 1179 | Opt_data_err_abort, Opt_data_err_ignore, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1180 | Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, |
Jan Kara | 5a20bdf | 2009-11-30 23:58:32 +0100 | [diff] [blame] | 1181 | Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, |
Theodore Ts'o | ee4a3fc | 2012-03-02 12:14:24 -0500 | [diff] [blame] | 1182 | Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err, |
Eric Sandeen | 661aa52 | 2012-02-20 17:53:04 -0500 | [diff] [blame] | 1183 | Opt_usrquota, Opt_grpquota, Opt_i_version, |
Theodore Ts'o | 1449032 | 2010-12-14 15:27:50 -0500 | [diff] [blame] | 1184 | Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_mblk_io_submit, |
| 1185 | Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, |
Eric Sandeen | 5328e63 | 2009-11-19 14:25:42 -0500 | [diff] [blame] | 1186 | Opt_inode_readahead_blks, Opt_journal_ioprio, |
Jiaying Zhang | 744692d | 2010-03-04 16:14:02 -0500 | [diff] [blame] | 1187 | Opt_dioread_nolock, Opt_dioread_lock, |
Theodore Ts'o | fc6cb1c | 2011-12-12 22:06:18 -0500 | [diff] [blame] | 1188 | Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1189 | }; |
| 1190 | |
Steven Whitehouse | a447c09 | 2008-10-13 10:46:57 +0100 | [diff] [blame] | 1191 | static const match_table_t tokens = { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1192 | {Opt_bsd_df, "bsddf"}, |
| 1193 | {Opt_minix_df, "minixdf"}, |
| 1194 | {Opt_grpid, "grpid"}, |
| 1195 | {Opt_grpid, "bsdgroups"}, |
| 1196 | {Opt_nogrpid, "nogrpid"}, |
| 1197 | {Opt_nogrpid, "sysvgroups"}, |
| 1198 | {Opt_resgid, "resgid=%u"}, |
| 1199 | {Opt_resuid, "resuid=%u"}, |
| 1200 | {Opt_sb, "sb=%u"}, |
| 1201 | {Opt_err_cont, "errors=continue"}, |
| 1202 | {Opt_err_panic, "errors=panic"}, |
| 1203 | {Opt_err_ro, "errors=remount-ro"}, |
| 1204 | {Opt_nouid32, "nouid32"}, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1205 | {Opt_debug, "debug"}, |
Theodore Ts'o | 72578c3 | 2012-03-03 18:04:40 -0500 | [diff] [blame] | 1206 | {Opt_removed, "oldalloc"}, |
| 1207 | {Opt_removed, "orlov"}, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1208 | {Opt_user_xattr, "user_xattr"}, |
| 1209 | {Opt_nouser_xattr, "nouser_xattr"}, |
| 1210 | {Opt_acl, "acl"}, |
| 1211 | {Opt_noacl, "noacl"}, |
Eric Sandeen | e3bb52a | 2009-11-19 14:28:50 -0500 | [diff] [blame] | 1212 | {Opt_noload, "norecovery"}, |
Theodore Ts'o | 5a916be | 2012-03-04 19:27:31 -0500 | [diff] [blame] | 1213 | {Opt_noload, "noload"}, |
Theodore Ts'o | 72578c3 | 2012-03-03 18:04:40 -0500 | [diff] [blame] | 1214 | {Opt_removed, "nobh"}, |
| 1215 | {Opt_removed, "bh"}, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1216 | {Opt_commit, "commit=%u"}, |
Theodore Ts'o | 3077384 | 2009-01-03 20:27:38 -0500 | [diff] [blame] | 1217 | {Opt_min_batch_time, "min_batch_time=%u"}, |
| 1218 | {Opt_max_batch_time, "max_batch_time=%u"}, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1219 | {Opt_journal_dev, "journal_dev=%u"}, |
Girish Shilamkar | 818d276 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 1220 | {Opt_journal_checksum, "journal_checksum"}, |
| 1221 | {Opt_journal_async_commit, "journal_async_commit"}, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1222 | {Opt_abort, "abort"}, |
| 1223 | {Opt_data_journal, "data=journal"}, |
| 1224 | {Opt_data_ordered, "data=ordered"}, |
| 1225 | {Opt_data_writeback, "data=writeback"}, |
Hidehiro Kawai | 5bf5683 | 2008-10-10 22:12:43 -0400 | [diff] [blame] | 1226 | {Opt_data_err_abort, "data_err=abort"}, |
| 1227 | {Opt_data_err_ignore, "data_err=ignore"}, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1228 | {Opt_offusrjquota, "usrjquota="}, |
| 1229 | {Opt_usrjquota, "usrjquota=%s"}, |
| 1230 | {Opt_offgrpjquota, "grpjquota="}, |
| 1231 | {Opt_grpjquota, "grpjquota=%s"}, |
| 1232 | {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, |
| 1233 | {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, |
Jan Kara | 5a20bdf | 2009-11-30 23:58:32 +0100 | [diff] [blame] | 1234 | {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1235 | {Opt_grpquota, "grpquota"}, |
| 1236 | {Opt_noquota, "noquota"}, |
| 1237 | {Opt_quota, "quota"}, |
| 1238 | {Opt_usrquota, "usrquota"}, |
| 1239 | {Opt_barrier, "barrier=%u"}, |
Theodore Ts'o | 06705bf | 2009-03-28 10:59:57 -0400 | [diff] [blame] | 1240 | {Opt_barrier, "barrier"}, |
| 1241 | {Opt_nobarrier, "nobarrier"}, |
Jean Noel Cordenner | 25ec56b | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 1242 | {Opt_i_version, "i_version"}, |
Alex Tomas | c9de560 | 2008-01-29 00:19:52 -0500 | [diff] [blame] | 1243 | {Opt_stripe, "stripe=%u"}, |
Alex Tomas | 6476924 | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 1244 | {Opt_delalloc, "delalloc"}, |
Aneesh Kumar K.V | dd919b9 | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 1245 | {Opt_nodelalloc, "nodelalloc"}, |
Theodore Ts'o | 1449032 | 2010-12-14 15:27:50 -0500 | [diff] [blame] | 1246 | {Opt_mblk_io_submit, "mblk_io_submit"}, |
| 1247 | {Opt_nomblk_io_submit, "nomblk_io_submit"}, |
Theodore Ts'o | 6fd058f | 2009-05-17 15:38:01 -0400 | [diff] [blame] | 1248 | {Opt_block_validity, "block_validity"}, |
| 1249 | {Opt_noblock_validity, "noblock_validity"}, |
Theodore Ts'o | 240799c | 2008-10-09 23:53:47 -0400 | [diff] [blame] | 1250 | {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, |
Theodore Ts'o | b3881f7 | 2009-01-05 22:46:26 -0500 | [diff] [blame] | 1251 | {Opt_journal_ioprio, "journal_ioprio=%u"}, |
Theodore Ts'o | afd4672 | 2009-03-16 23:12:23 -0400 | [diff] [blame] | 1252 | {Opt_auto_da_alloc, "auto_da_alloc=%u"}, |
Theodore Ts'o | 06705bf | 2009-03-28 10:59:57 -0400 | [diff] [blame] | 1253 | {Opt_auto_da_alloc, "auto_da_alloc"}, |
| 1254 | {Opt_noauto_da_alloc, "noauto_da_alloc"}, |
Jiaying Zhang | 744692d | 2010-03-04 16:14:02 -0500 | [diff] [blame] | 1255 | {Opt_dioread_nolock, "dioread_nolock"}, |
| 1256 | {Opt_dioread_lock, "dioread_lock"}, |
Eric Sandeen | 5328e63 | 2009-11-19 14:25:42 -0500 | [diff] [blame] | 1257 | {Opt_discard, "discard"}, |
| 1258 | {Opt_nodiscard, "nodiscard"}, |
Theodore Ts'o | fc6cb1c | 2011-12-12 22:06:18 -0500 | [diff] [blame] | 1259 | {Opt_init_itable, "init_itable=%u"}, |
| 1260 | {Opt_init_itable, "init_itable"}, |
| 1261 | {Opt_noinit_itable, "noinit_itable"}, |
Theodore Ts'o | c7198b9 | 2012-03-04 22:00:53 -0500 | [diff] [blame] | 1262 | {Opt_removed, "check=none"}, /* mount option from ext2/3 */ |
| 1263 | {Opt_removed, "nocheck"}, /* mount option from ext2/3 */ |
| 1264 | {Opt_removed, "reservation"}, /* mount option from ext2/3 */ |
| 1265 | {Opt_removed, "noreservation"}, /* mount option from ext2/3 */ |
| 1266 | {Opt_removed, "journal=%u"}, /* mount option from ext2/3 */ |
Josef Bacik | f3f12fa | 2008-04-29 22:05:28 -0400 | [diff] [blame] | 1267 | {Opt_err, NULL}, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1268 | }; |
| 1269 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1270 | static ext4_fsblk_t get_sb_block(void **data) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1271 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1272 | ext4_fsblk_t sb_block; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1273 | char *options = (char *) *data; |
| 1274 | |
| 1275 | if (!options || strncmp(options, "sb=", 3) != 0) |
| 1276 | return 1; /* Default location */ |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 1277 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1278 | options += 3; |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 1279 | /* TODO: use simple_strtoll with >32bit ext4 */ |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1280 | sb_block = simple_strtoul(options, &options, 0); |
| 1281 | if (*options && *options != ',') { |
Theodore Ts'o | 4776004f | 2008-09-08 23:00:52 -0400 | [diff] [blame] | 1282 | printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1283 | (char *) *data); |
| 1284 | return 1; |
| 1285 | } |
| 1286 | if (*options == ',') |
| 1287 | options++; |
| 1288 | *data = (void *) options; |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 1289 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1290 | return sb_block; |
| 1291 | } |
| 1292 | |
Theodore Ts'o | b3881f7 | 2009-01-05 22:46:26 -0500 | [diff] [blame] | 1293 | #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) |
Dmitry Monakhov | 437ca0f | 2010-03-01 22:29:21 -0500 | [diff] [blame] | 1294 | static char deprecated_msg[] = "Mount option \"%s\" will be removed by %s\n" |
| 1295 | "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] | 1296 | |
Dmitry Monakhov | 56c50f1 | 2010-03-01 23:28:41 -0500 | [diff] [blame] | 1297 | #ifdef CONFIG_QUOTA |
| 1298 | static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) |
| 1299 | { |
| 1300 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
| 1301 | char *qname; |
| 1302 | |
| 1303 | if (sb_any_quota_loaded(sb) && |
| 1304 | !sbi->s_qf_names[qtype]) { |
| 1305 | ext4_msg(sb, KERN_ERR, |
| 1306 | "Cannot change journaled " |
| 1307 | "quota options when quota turned on"); |
Theodore Ts'o | 57f73c2 | 2012-04-16 18:55:26 -0400 | [diff] [blame] | 1308 | return -1; |
Dmitry Monakhov | 56c50f1 | 2010-03-01 23:28:41 -0500 | [diff] [blame] | 1309 | } |
| 1310 | qname = match_strdup(args); |
| 1311 | if (!qname) { |
| 1312 | ext4_msg(sb, KERN_ERR, |
| 1313 | "Not enough memory for storing quotafile name"); |
Theodore Ts'o | 57f73c2 | 2012-04-16 18:55:26 -0400 | [diff] [blame] | 1314 | return -1; |
Dmitry Monakhov | 56c50f1 | 2010-03-01 23:28:41 -0500 | [diff] [blame] | 1315 | } |
| 1316 | if (sbi->s_qf_names[qtype] && |
| 1317 | strcmp(sbi->s_qf_names[qtype], qname)) { |
| 1318 | ext4_msg(sb, KERN_ERR, |
| 1319 | "%s quota file already specified", QTYPE2NAME(qtype)); |
| 1320 | kfree(qname); |
Theodore Ts'o | 57f73c2 | 2012-04-16 18:55:26 -0400 | [diff] [blame] | 1321 | return -1; |
Dmitry Monakhov | 56c50f1 | 2010-03-01 23:28:41 -0500 | [diff] [blame] | 1322 | } |
| 1323 | sbi->s_qf_names[qtype] = qname; |
| 1324 | if (strchr(sbi->s_qf_names[qtype], '/')) { |
| 1325 | ext4_msg(sb, KERN_ERR, |
| 1326 | "quotafile must be on filesystem root"); |
| 1327 | kfree(sbi->s_qf_names[qtype]); |
| 1328 | sbi->s_qf_names[qtype] = NULL; |
Theodore Ts'o | 57f73c2 | 2012-04-16 18:55:26 -0400 | [diff] [blame] | 1329 | return -1; |
Dmitry Monakhov | 56c50f1 | 2010-03-01 23:28:41 -0500 | [diff] [blame] | 1330 | } |
Theodore Ts'o | fd8c37e | 2010-12-15 20:26:48 -0500 | [diff] [blame] | 1331 | set_opt(sb, QUOTA); |
Dmitry Monakhov | 56c50f1 | 2010-03-01 23:28:41 -0500 | [diff] [blame] | 1332 | return 1; |
| 1333 | } |
| 1334 | |
| 1335 | static int clear_qf_name(struct super_block *sb, int qtype) |
| 1336 | { |
| 1337 | |
| 1338 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
| 1339 | |
| 1340 | if (sb_any_quota_loaded(sb) && |
| 1341 | sbi->s_qf_names[qtype]) { |
| 1342 | ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" |
| 1343 | " when quota turned on"); |
Theodore Ts'o | 57f73c2 | 2012-04-16 18:55:26 -0400 | [diff] [blame] | 1344 | return -1; |
Dmitry Monakhov | 56c50f1 | 2010-03-01 23:28:41 -0500 | [diff] [blame] | 1345 | } |
| 1346 | /* |
| 1347 | * The space will be released later when all options are confirmed |
| 1348 | * to be correct |
| 1349 | */ |
| 1350 | sbi->s_qf_names[qtype] = NULL; |
| 1351 | return 1; |
| 1352 | } |
| 1353 | #endif |
| 1354 | |
Theodore Ts'o | 26092bf | 2012-03-03 23:20:47 -0500 | [diff] [blame] | 1355 | #define MOPT_SET 0x0001 |
| 1356 | #define MOPT_CLEAR 0x0002 |
| 1357 | #define MOPT_NOSUPPORT 0x0004 |
| 1358 | #define MOPT_EXPLICIT 0x0008 |
| 1359 | #define MOPT_CLEAR_ERR 0x0010 |
| 1360 | #define MOPT_GTE0 0x0020 |
| 1361 | #ifdef CONFIG_QUOTA |
| 1362 | #define MOPT_Q 0 |
| 1363 | #define MOPT_QFMT 0x0040 |
| 1364 | #else |
| 1365 | #define MOPT_Q MOPT_NOSUPPORT |
| 1366 | #define MOPT_QFMT MOPT_NOSUPPORT |
| 1367 | #endif |
| 1368 | #define MOPT_DATAJ 0x0080 |
| 1369 | |
| 1370 | static const struct mount_opts { |
| 1371 | int token; |
| 1372 | int mount_opt; |
| 1373 | int flags; |
| 1374 | } ext4_mount_opts[] = { |
| 1375 | {Opt_minix_df, EXT4_MOUNT_MINIX_DF, MOPT_SET}, |
| 1376 | {Opt_bsd_df, EXT4_MOUNT_MINIX_DF, MOPT_CLEAR}, |
| 1377 | {Opt_grpid, EXT4_MOUNT_GRPID, MOPT_SET}, |
| 1378 | {Opt_nogrpid, EXT4_MOUNT_GRPID, MOPT_CLEAR}, |
| 1379 | {Opt_mblk_io_submit, EXT4_MOUNT_MBLK_IO_SUBMIT, MOPT_SET}, |
| 1380 | {Opt_nomblk_io_submit, EXT4_MOUNT_MBLK_IO_SUBMIT, MOPT_CLEAR}, |
| 1381 | {Opt_block_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_SET}, |
| 1382 | {Opt_noblock_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_CLEAR}, |
| 1383 | {Opt_dioread_nolock, EXT4_MOUNT_DIOREAD_NOLOCK, MOPT_SET}, |
| 1384 | {Opt_dioread_lock, EXT4_MOUNT_DIOREAD_NOLOCK, MOPT_CLEAR}, |
| 1385 | {Opt_discard, EXT4_MOUNT_DISCARD, MOPT_SET}, |
| 1386 | {Opt_nodiscard, EXT4_MOUNT_DISCARD, MOPT_CLEAR}, |
| 1387 | {Opt_delalloc, EXT4_MOUNT_DELALLOC, MOPT_SET | MOPT_EXPLICIT}, |
| 1388 | {Opt_nodelalloc, EXT4_MOUNT_DELALLOC, MOPT_CLEAR | MOPT_EXPLICIT}, |
| 1389 | {Opt_journal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, MOPT_SET}, |
| 1390 | {Opt_journal_async_commit, (EXT4_MOUNT_JOURNAL_ASYNC_COMMIT | |
| 1391 | EXT4_MOUNT_JOURNAL_CHECKSUM), MOPT_SET}, |
| 1392 | {Opt_noload, EXT4_MOUNT_NOLOAD, MOPT_SET}, |
| 1393 | {Opt_err_panic, EXT4_MOUNT_ERRORS_PANIC, MOPT_SET | MOPT_CLEAR_ERR}, |
| 1394 | {Opt_err_ro, EXT4_MOUNT_ERRORS_RO, MOPT_SET | MOPT_CLEAR_ERR}, |
| 1395 | {Opt_err_cont, EXT4_MOUNT_ERRORS_CONT, MOPT_SET | MOPT_CLEAR_ERR}, |
| 1396 | {Opt_data_err_abort, EXT4_MOUNT_DATA_ERR_ABORT, MOPT_SET}, |
| 1397 | {Opt_data_err_ignore, EXT4_MOUNT_DATA_ERR_ABORT, MOPT_CLEAR}, |
| 1398 | {Opt_barrier, EXT4_MOUNT_BARRIER, MOPT_SET}, |
| 1399 | {Opt_nobarrier, EXT4_MOUNT_BARRIER, MOPT_CLEAR}, |
| 1400 | {Opt_noauto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_SET}, |
| 1401 | {Opt_auto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_CLEAR}, |
| 1402 | {Opt_noinit_itable, EXT4_MOUNT_INIT_INODE_TABLE, MOPT_CLEAR}, |
| 1403 | {Opt_commit, 0, MOPT_GTE0}, |
| 1404 | {Opt_max_batch_time, 0, MOPT_GTE0}, |
| 1405 | {Opt_min_batch_time, 0, MOPT_GTE0}, |
| 1406 | {Opt_inode_readahead_blks, 0, MOPT_GTE0}, |
| 1407 | {Opt_init_itable, 0, MOPT_GTE0}, |
| 1408 | {Opt_stripe, 0, MOPT_GTE0}, |
| 1409 | {Opt_data_journal, EXT4_MOUNT_JOURNAL_DATA, MOPT_DATAJ}, |
| 1410 | {Opt_data_ordered, EXT4_MOUNT_ORDERED_DATA, MOPT_DATAJ}, |
| 1411 | {Opt_data_writeback, EXT4_MOUNT_WRITEBACK_DATA, MOPT_DATAJ}, |
| 1412 | #ifdef CONFIG_EXT4_FS_XATTR |
| 1413 | {Opt_user_xattr, EXT4_MOUNT_XATTR_USER, MOPT_SET}, |
| 1414 | {Opt_nouser_xattr, EXT4_MOUNT_XATTR_USER, MOPT_CLEAR}, |
| 1415 | #else |
| 1416 | {Opt_user_xattr, 0, MOPT_NOSUPPORT}, |
| 1417 | {Opt_nouser_xattr, 0, MOPT_NOSUPPORT}, |
| 1418 | #endif |
| 1419 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
| 1420 | {Opt_acl, EXT4_MOUNT_POSIX_ACL, MOPT_SET}, |
| 1421 | {Opt_noacl, EXT4_MOUNT_POSIX_ACL, MOPT_CLEAR}, |
| 1422 | #else |
| 1423 | {Opt_acl, 0, MOPT_NOSUPPORT}, |
| 1424 | {Opt_noacl, 0, MOPT_NOSUPPORT}, |
| 1425 | #endif |
| 1426 | {Opt_nouid32, EXT4_MOUNT_NO_UID32, MOPT_SET}, |
| 1427 | {Opt_debug, EXT4_MOUNT_DEBUG, MOPT_SET}, |
| 1428 | {Opt_quota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, MOPT_SET | MOPT_Q}, |
| 1429 | {Opt_usrquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, |
| 1430 | MOPT_SET | MOPT_Q}, |
| 1431 | {Opt_grpquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_GRPQUOTA, |
| 1432 | MOPT_SET | MOPT_Q}, |
| 1433 | {Opt_noquota, (EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | |
| 1434 | EXT4_MOUNT_GRPQUOTA), MOPT_CLEAR | MOPT_Q}, |
| 1435 | {Opt_usrjquota, 0, MOPT_Q}, |
| 1436 | {Opt_grpjquota, 0, MOPT_Q}, |
| 1437 | {Opt_offusrjquota, 0, MOPT_Q}, |
| 1438 | {Opt_offgrpjquota, 0, MOPT_Q}, |
| 1439 | {Opt_jqfmt_vfsold, QFMT_VFS_OLD, MOPT_QFMT}, |
| 1440 | {Opt_jqfmt_vfsv0, QFMT_VFS_V0, MOPT_QFMT}, |
| 1441 | {Opt_jqfmt_vfsv1, QFMT_VFS_V1, MOPT_QFMT}, |
| 1442 | {Opt_err, 0, 0} |
| 1443 | }; |
| 1444 | |
| 1445 | static int handle_mount_opt(struct super_block *sb, char *opt, int token, |
| 1446 | substring_t *args, unsigned long *journal_devnum, |
| 1447 | unsigned int *journal_ioprio, int is_remount) |
| 1448 | { |
| 1449 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
| 1450 | const struct mount_opts *m; |
| 1451 | int arg = 0; |
| 1452 | |
Theodore Ts'o | 57f73c2 | 2012-04-16 18:55:26 -0400 | [diff] [blame] | 1453 | #ifdef CONFIG_QUOTA |
| 1454 | if (token == Opt_usrjquota) |
| 1455 | return set_qf_name(sb, USRQUOTA, &args[0]); |
| 1456 | else if (token == Opt_grpjquota) |
| 1457 | return set_qf_name(sb, GRPQUOTA, &args[0]); |
| 1458 | else if (token == Opt_offusrjquota) |
| 1459 | return clear_qf_name(sb, USRQUOTA); |
| 1460 | else if (token == Opt_offgrpjquota) |
| 1461 | return clear_qf_name(sb, GRPQUOTA); |
| 1462 | #endif |
Theodore Ts'o | 26092bf | 2012-03-03 23:20:47 -0500 | [diff] [blame] | 1463 | if (args->from && match_int(args, &arg)) |
| 1464 | return -1; |
| 1465 | switch (token) { |
Theodore Ts'o | f704860 | 2012-03-04 22:06:20 -0500 | [diff] [blame] | 1466 | case Opt_noacl: |
| 1467 | case Opt_nouser_xattr: |
| 1468 | ext4_msg(sb, KERN_WARNING, deprecated_msg, opt, "3.5"); |
| 1469 | break; |
Theodore Ts'o | 26092bf | 2012-03-03 23:20:47 -0500 | [diff] [blame] | 1470 | case Opt_sb: |
| 1471 | return 1; /* handled by get_sb_block() */ |
| 1472 | case Opt_removed: |
| 1473 | ext4_msg(sb, KERN_WARNING, |
| 1474 | "Ignoring removed %s option", opt); |
| 1475 | return 1; |
| 1476 | case Opt_resuid: |
| 1477 | sbi->s_resuid = arg; |
| 1478 | return 1; |
| 1479 | case Opt_resgid: |
| 1480 | sbi->s_resgid = arg; |
| 1481 | return 1; |
| 1482 | case Opt_abort: |
| 1483 | sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; |
| 1484 | return 1; |
| 1485 | case Opt_i_version: |
| 1486 | sb->s_flags |= MS_I_VERSION; |
| 1487 | return 1; |
| 1488 | case Opt_journal_dev: |
| 1489 | if (is_remount) { |
| 1490 | ext4_msg(sb, KERN_ERR, |
| 1491 | "Cannot specify journal on remount"); |
| 1492 | return -1; |
| 1493 | } |
| 1494 | *journal_devnum = arg; |
| 1495 | return 1; |
| 1496 | case Opt_journal_ioprio: |
| 1497 | if (arg < 0 || arg > 7) |
| 1498 | return -1; |
| 1499 | *journal_ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, arg); |
| 1500 | return 1; |
| 1501 | } |
| 1502 | |
| 1503 | for (m = ext4_mount_opts; m->token != Opt_err; m++) { |
| 1504 | if (token != m->token) |
| 1505 | continue; |
| 1506 | if (args->from && (m->flags & MOPT_GTE0) && (arg < 0)) |
| 1507 | return -1; |
| 1508 | if (m->flags & MOPT_EXPLICIT) |
| 1509 | set_opt2(sb, EXPLICIT_DELALLOC); |
| 1510 | if (m->flags & MOPT_CLEAR_ERR) |
| 1511 | clear_opt(sb, ERRORS_MASK); |
| 1512 | if (token == Opt_noquota && sb_any_quota_loaded(sb)) { |
| 1513 | ext4_msg(sb, KERN_ERR, "Cannot change quota " |
| 1514 | "options when quota turned on"); |
| 1515 | return -1; |
| 1516 | } |
| 1517 | |
| 1518 | if (m->flags & MOPT_NOSUPPORT) { |
| 1519 | ext4_msg(sb, KERN_ERR, "%s option not supported", opt); |
| 1520 | } else if (token == Opt_commit) { |
| 1521 | if (arg == 0) |
| 1522 | arg = JBD2_DEFAULT_MAX_COMMIT_AGE; |
| 1523 | sbi->s_commit_interval = HZ * arg; |
| 1524 | } else if (token == Opt_max_batch_time) { |
| 1525 | if (arg == 0) |
| 1526 | arg = EXT4_DEF_MAX_BATCH_TIME; |
| 1527 | sbi->s_max_batch_time = arg; |
| 1528 | } else if (token == Opt_min_batch_time) { |
| 1529 | sbi->s_min_batch_time = arg; |
| 1530 | } else if (token == Opt_inode_readahead_blks) { |
| 1531 | if (arg > (1 << 30)) |
| 1532 | return -1; |
| 1533 | if (arg && !is_power_of_2(arg)) { |
| 1534 | ext4_msg(sb, KERN_ERR, |
| 1535 | "EXT4-fs: inode_readahead_blks" |
| 1536 | " must be a power of 2"); |
| 1537 | return -1; |
| 1538 | } |
| 1539 | sbi->s_inode_readahead_blks = arg; |
| 1540 | } else if (token == Opt_init_itable) { |
| 1541 | set_opt(sb, INIT_INODE_TABLE); |
| 1542 | if (!args->from) |
| 1543 | arg = EXT4_DEF_LI_WAIT_MULT; |
| 1544 | sbi->s_li_wait_mult = arg; |
| 1545 | } else if (token == Opt_stripe) { |
| 1546 | sbi->s_stripe = arg; |
| 1547 | } else if (m->flags & MOPT_DATAJ) { |
| 1548 | if (is_remount) { |
| 1549 | if (!sbi->s_journal) |
| 1550 | ext4_msg(sb, KERN_WARNING, "Remounting file system with no journal so ignoring journalled data option"); |
| 1551 | else if (test_opt(sb, DATA_FLAGS) != |
| 1552 | m->mount_opt) { |
| 1553 | ext4_msg(sb, KERN_ERR, |
| 1554 | "Cannot change data mode on remount"); |
| 1555 | return -1; |
| 1556 | } |
| 1557 | } else { |
| 1558 | clear_opt(sb, DATA_FLAGS); |
| 1559 | sbi->s_mount_opt |= m->mount_opt; |
| 1560 | } |
| 1561 | #ifdef CONFIG_QUOTA |
Theodore Ts'o | 26092bf | 2012-03-03 23:20:47 -0500 | [diff] [blame] | 1562 | } else if (m->flags & MOPT_QFMT) { |
| 1563 | if (sb_any_quota_loaded(sb) && |
| 1564 | sbi->s_jquota_fmt != m->mount_opt) { |
| 1565 | ext4_msg(sb, KERN_ERR, "Cannot " |
| 1566 | "change journaled quota options " |
| 1567 | "when quota turned on"); |
| 1568 | return -1; |
| 1569 | } |
| 1570 | sbi->s_jquota_fmt = m->mount_opt; |
| 1571 | #endif |
| 1572 | } else { |
| 1573 | if (!args->from) |
| 1574 | arg = 1; |
| 1575 | if (m->flags & MOPT_CLEAR) |
| 1576 | arg = !arg; |
| 1577 | else if (unlikely(!(m->flags & MOPT_SET))) { |
| 1578 | ext4_msg(sb, KERN_WARNING, |
| 1579 | "buggy handling of option %s", opt); |
| 1580 | WARN_ON(1); |
| 1581 | return -1; |
| 1582 | } |
| 1583 | if (arg != 0) |
| 1584 | sbi->s_mount_opt |= m->mount_opt; |
| 1585 | else |
| 1586 | sbi->s_mount_opt &= ~m->mount_opt; |
| 1587 | } |
| 1588 | return 1; |
| 1589 | } |
| 1590 | ext4_msg(sb, KERN_ERR, "Unrecognized mount option \"%s\" " |
| 1591 | "or missing value", opt); |
| 1592 | return -1; |
| 1593 | } |
| 1594 | |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 1595 | static int parse_options(char *options, struct super_block *sb, |
Theodore Ts'o | c319106 | 2009-01-06 11:14:25 -0500 | [diff] [blame] | 1596 | unsigned long *journal_devnum, |
Theodore Ts'o | b3881f7 | 2009-01-05 22:46:26 -0500 | [diff] [blame] | 1597 | unsigned int *journal_ioprio, |
Eric Sandeen | 661aa52 | 2012-02-20 17:53:04 -0500 | [diff] [blame] | 1598 | int is_remount) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1599 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1600 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 1601 | char *p; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1602 | substring_t args[MAX_OPT_ARGS]; |
Theodore Ts'o | 26092bf | 2012-03-03 23:20:47 -0500 | [diff] [blame] | 1603 | int token; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1604 | |
| 1605 | if (!options) |
| 1606 | return 1; |
| 1607 | |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 1608 | while ((p = strsep(&options, ",")) != NULL) { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1609 | if (!*p) |
| 1610 | continue; |
Eric Sandeen | 15121c1 | 2010-02-15 20:17:55 -0500 | [diff] [blame] | 1611 | /* |
| 1612 | * Initialize args struct so we know whether arg was |
| 1613 | * found; some options take optional arguments. |
| 1614 | */ |
Theodore Ts'o | 26092bf | 2012-03-03 23:20:47 -0500 | [diff] [blame] | 1615 | args[0].to = args[0].from = 0; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1616 | token = match_token(p, tokens, args); |
Theodore Ts'o | 26092bf | 2012-03-03 23:20:47 -0500 | [diff] [blame] | 1617 | if (handle_mount_opt(sb, p, token, args, journal_devnum, |
| 1618 | journal_ioprio, is_remount) < 0) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1619 | return 0; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1620 | } |
| 1621 | #ifdef CONFIG_QUOTA |
| 1622 | if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { |
Dmitry Monakhov | 482a742 | 2010-02-24 11:35:32 -0500 | [diff] [blame] | 1623 | if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) |
Theodore Ts'o | fd8c37e | 2010-12-15 20:26:48 -0500 | [diff] [blame] | 1624 | clear_opt(sb, USRQUOTA); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1625 | |
Dmitry Monakhov | 482a742 | 2010-02-24 11:35:32 -0500 | [diff] [blame] | 1626 | if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) |
Theodore Ts'o | fd8c37e | 2010-12-15 20:26:48 -0500 | [diff] [blame] | 1627 | clear_opt(sb, GRPQUOTA); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1628 | |
Dmitry Monakhov | 56c50f1 | 2010-03-01 23:28:41 -0500 | [diff] [blame] | 1629 | if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 1630 | ext4_msg(sb, KERN_ERR, "old and new quota " |
| 1631 | "format mixing"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1632 | return 0; |
| 1633 | } |
| 1634 | |
| 1635 | if (!sbi->s_jquota_fmt) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 1636 | ext4_msg(sb, KERN_ERR, "journaled quota format " |
| 1637 | "not specified"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1638 | return 0; |
| 1639 | } |
| 1640 | } else { |
| 1641 | if (sbi->s_jquota_fmt) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 1642 | ext4_msg(sb, KERN_ERR, "journaled quota format " |
Jan Kara | 2c8be6b | 2008-05-13 21:27:55 -0400 | [diff] [blame] | 1643 | "specified with no journaling " |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 1644 | "enabled"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1645 | return 0; |
| 1646 | } |
| 1647 | } |
| 1648 | #endif |
| 1649 | return 1; |
| 1650 | } |
| 1651 | |
Theodore Ts'o | 2adf6da | 2012-03-03 23:20:50 -0500 | [diff] [blame] | 1652 | static inline void ext4_show_quota_options(struct seq_file *seq, |
| 1653 | struct super_block *sb) |
| 1654 | { |
| 1655 | #if defined(CONFIG_QUOTA) |
| 1656 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
| 1657 | |
| 1658 | if (sbi->s_jquota_fmt) { |
| 1659 | char *fmtname = ""; |
| 1660 | |
| 1661 | switch (sbi->s_jquota_fmt) { |
| 1662 | case QFMT_VFS_OLD: |
| 1663 | fmtname = "vfsold"; |
| 1664 | break; |
| 1665 | case QFMT_VFS_V0: |
| 1666 | fmtname = "vfsv0"; |
| 1667 | break; |
| 1668 | case QFMT_VFS_V1: |
| 1669 | fmtname = "vfsv1"; |
| 1670 | break; |
| 1671 | } |
| 1672 | seq_printf(seq, ",jqfmt=%s", fmtname); |
| 1673 | } |
| 1674 | |
| 1675 | if (sbi->s_qf_names[USRQUOTA]) |
| 1676 | seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); |
| 1677 | |
| 1678 | if (sbi->s_qf_names[GRPQUOTA]) |
| 1679 | seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); |
| 1680 | |
| 1681 | if (test_opt(sb, USRQUOTA)) |
| 1682 | seq_puts(seq, ",usrquota"); |
| 1683 | |
| 1684 | if (test_opt(sb, GRPQUOTA)) |
| 1685 | seq_puts(seq, ",grpquota"); |
| 1686 | #endif |
| 1687 | } |
| 1688 | |
Theodore Ts'o | 5a916be | 2012-03-04 19:27:31 -0500 | [diff] [blame] | 1689 | static const char *token2str(int token) |
| 1690 | { |
| 1691 | static const struct match_token *t; |
| 1692 | |
| 1693 | for (t = tokens; t->token != Opt_err; t++) |
| 1694 | if (t->token == token && !strchr(t->pattern, '=')) |
| 1695 | break; |
| 1696 | return t->pattern; |
| 1697 | } |
| 1698 | |
Theodore Ts'o | 2adf6da | 2012-03-03 23:20:50 -0500 | [diff] [blame] | 1699 | /* |
| 1700 | * Show an option if |
| 1701 | * - it's set to a non-default value OR |
| 1702 | * - if the per-sb default is different from the global default |
| 1703 | */ |
Theodore Ts'o | 66acdcf | 2012-03-04 20:21:38 -0500 | [diff] [blame] | 1704 | static int _ext4_show_options(struct seq_file *seq, struct super_block *sb, |
| 1705 | int nodefs) |
Theodore Ts'o | 2adf6da | 2012-03-03 23:20:50 -0500 | [diff] [blame] | 1706 | { |
Theodore Ts'o | 2adf6da | 2012-03-03 23:20:50 -0500 | [diff] [blame] | 1707 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
| 1708 | struct ext4_super_block *es = sbi->s_es; |
Theodore Ts'o | 66acdcf | 2012-03-04 20:21:38 -0500 | [diff] [blame] | 1709 | 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] | 1710 | const struct mount_opts *m; |
Theodore Ts'o | 66acdcf | 2012-03-04 20:21:38 -0500 | [diff] [blame] | 1711 | char sep = nodefs ? '\n' : ','; |
Theodore Ts'o | 2adf6da | 2012-03-03 23:20:50 -0500 | [diff] [blame] | 1712 | |
Theodore Ts'o | 66acdcf | 2012-03-04 20:21:38 -0500 | [diff] [blame] | 1713 | #define SEQ_OPTS_PUTS(str) seq_printf(seq, "%c" str, sep) |
| 1714 | #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] | 1715 | |
| 1716 | if (sbi->s_sb_block != 1) |
Theodore Ts'o | 5a916be | 2012-03-04 19:27:31 -0500 | [diff] [blame] | 1717 | SEQ_OPTS_PRINT("sb=%llu", sbi->s_sb_block); |
| 1718 | |
| 1719 | for (m = ext4_mount_opts; m->token != Opt_err; m++) { |
| 1720 | int want_set = m->flags & MOPT_SET; |
| 1721 | if (((m->flags & (MOPT_SET|MOPT_CLEAR)) == 0) || |
| 1722 | (m->flags & MOPT_CLEAR_ERR)) |
| 1723 | continue; |
Theodore Ts'o | 66acdcf | 2012-03-04 20:21:38 -0500 | [diff] [blame] | 1724 | if (!(m->mount_opt & (sbi->s_mount_opt ^ def_mount_opt))) |
Theodore Ts'o | 5a916be | 2012-03-04 19:27:31 -0500 | [diff] [blame] | 1725 | continue; /* skip if same as the default */ |
| 1726 | if ((want_set && |
| 1727 | (sbi->s_mount_opt & m->mount_opt) != m->mount_opt) || |
| 1728 | (!want_set && (sbi->s_mount_opt & m->mount_opt))) |
| 1729 | continue; /* select Opt_noFoo vs Opt_Foo */ |
| 1730 | SEQ_OPTS_PRINT("%s", token2str(m->token)); |
| 1731 | } |
| 1732 | |
Theodore Ts'o | 66acdcf | 2012-03-04 20:21:38 -0500 | [diff] [blame] | 1733 | if (nodefs || sbi->s_resuid != EXT4_DEF_RESUID || |
Theodore Ts'o | 5a916be | 2012-03-04 19:27:31 -0500 | [diff] [blame] | 1734 | le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) |
| 1735 | SEQ_OPTS_PRINT("resuid=%u", sbi->s_resuid); |
Theodore Ts'o | 66acdcf | 2012-03-04 20:21:38 -0500 | [diff] [blame] | 1736 | if (nodefs || sbi->s_resgid != EXT4_DEF_RESGID || |
Theodore Ts'o | 5a916be | 2012-03-04 19:27:31 -0500 | [diff] [blame] | 1737 | le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) |
| 1738 | SEQ_OPTS_PRINT("resgid=%u", sbi->s_resgid); |
Theodore Ts'o | 66acdcf | 2012-03-04 20:21:38 -0500 | [diff] [blame] | 1739 | def_errors = nodefs ? -1 : le16_to_cpu(es->s_errors); |
Theodore Ts'o | 5a916be | 2012-03-04 19:27:31 -0500 | [diff] [blame] | 1740 | if (test_opt(sb, ERRORS_RO) && def_errors != EXT4_ERRORS_RO) |
| 1741 | SEQ_OPTS_PUTS("errors=remount-ro"); |
Theodore Ts'o | 2adf6da | 2012-03-03 23:20:50 -0500 | [diff] [blame] | 1742 | if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) |
Theodore Ts'o | 5a916be | 2012-03-04 19:27:31 -0500 | [diff] [blame] | 1743 | SEQ_OPTS_PUTS("errors=continue"); |
Theodore Ts'o | 2adf6da | 2012-03-03 23:20:50 -0500 | [diff] [blame] | 1744 | if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) |
Theodore Ts'o | 5a916be | 2012-03-04 19:27:31 -0500 | [diff] [blame] | 1745 | SEQ_OPTS_PUTS("errors=panic"); |
Theodore Ts'o | 66acdcf | 2012-03-04 20:21:38 -0500 | [diff] [blame] | 1746 | 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] | 1747 | SEQ_OPTS_PRINT("commit=%lu", sbi->s_commit_interval / HZ); |
Theodore Ts'o | 66acdcf | 2012-03-04 20:21:38 -0500 | [diff] [blame] | 1748 | 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] | 1749 | 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] | 1750 | 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] | 1751 | 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] | 1752 | if (sb->s_flags & MS_I_VERSION) |
Theodore Ts'o | 5a916be | 2012-03-04 19:27:31 -0500 | [diff] [blame] | 1753 | SEQ_OPTS_PUTS("i_version"); |
Theodore Ts'o | 66acdcf | 2012-03-04 20:21:38 -0500 | [diff] [blame] | 1754 | if (nodefs || sbi->s_stripe) |
Theodore Ts'o | 5a916be | 2012-03-04 19:27:31 -0500 | [diff] [blame] | 1755 | SEQ_OPTS_PRINT("stripe=%lu", sbi->s_stripe); |
Theodore Ts'o | 66acdcf | 2012-03-04 20:21:38 -0500 | [diff] [blame] | 1756 | 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] | 1757 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) |
| 1758 | SEQ_OPTS_PUTS("data=journal"); |
| 1759 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) |
| 1760 | SEQ_OPTS_PUTS("data=ordered"); |
| 1761 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) |
| 1762 | SEQ_OPTS_PUTS("data=writeback"); |
| 1763 | } |
Theodore Ts'o | 66acdcf | 2012-03-04 20:21:38 -0500 | [diff] [blame] | 1764 | if (nodefs || |
| 1765 | sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) |
Theodore Ts'o | 5a916be | 2012-03-04 19:27:31 -0500 | [diff] [blame] | 1766 | SEQ_OPTS_PRINT("inode_readahead_blks=%u", |
| 1767 | sbi->s_inode_readahead_blks); |
Theodore Ts'o | 2adf6da | 2012-03-03 23:20:50 -0500 | [diff] [blame] | 1768 | |
Theodore Ts'o | 66acdcf | 2012-03-04 20:21:38 -0500 | [diff] [blame] | 1769 | if (nodefs || (test_opt(sb, INIT_INODE_TABLE) && |
| 1770 | (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT))) |
Theodore Ts'o | 5a916be | 2012-03-04 19:27:31 -0500 | [diff] [blame] | 1771 | SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult); |
Theodore Ts'o | 2adf6da | 2012-03-03 23:20:50 -0500 | [diff] [blame] | 1772 | |
| 1773 | ext4_show_quota_options(seq, sb); |
Theodore Ts'o | 2adf6da | 2012-03-03 23:20:50 -0500 | [diff] [blame] | 1774 | return 0; |
| 1775 | } |
| 1776 | |
Theodore Ts'o | 66acdcf | 2012-03-04 20:21:38 -0500 | [diff] [blame] | 1777 | static int ext4_show_options(struct seq_file *seq, struct dentry *root) |
| 1778 | { |
| 1779 | return _ext4_show_options(seq, root->d_sb, 0); |
| 1780 | } |
| 1781 | |
| 1782 | static int options_seq_show(struct seq_file *seq, void *offset) |
| 1783 | { |
| 1784 | struct super_block *sb = seq->private; |
| 1785 | int rc; |
| 1786 | |
| 1787 | seq_puts(seq, (sb->s_flags & MS_RDONLY) ? "ro" : "rw"); |
| 1788 | rc = _ext4_show_options(seq, sb, 1); |
| 1789 | seq_puts(seq, "\n"); |
| 1790 | return rc; |
| 1791 | } |
| 1792 | |
| 1793 | static int options_open_fs(struct inode *inode, struct file *file) |
| 1794 | { |
| 1795 | return single_open(file, options_seq_show, PDE(inode)->data); |
| 1796 | } |
| 1797 | |
| 1798 | static const struct file_operations ext4_seq_options_fops = { |
| 1799 | .owner = THIS_MODULE, |
| 1800 | .open = options_open_fs, |
| 1801 | .read = seq_read, |
| 1802 | .llseek = seq_lseek, |
| 1803 | .release = single_release, |
| 1804 | }; |
| 1805 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1806 | 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] | 1807 | int read_only) |
| 1808 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1809 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1810 | int res = 0; |
| 1811 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1812 | if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 1813 | ext4_msg(sb, KERN_ERR, "revision level too high, " |
| 1814 | "forcing read-only mode"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1815 | res = MS_RDONLY; |
| 1816 | } |
| 1817 | if (read_only) |
Theodore Ts'o | 281b599 | 2011-09-09 18:34:51 -0400 | [diff] [blame] | 1818 | goto done; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1819 | if (!(sbi->s_mount_state & EXT4_VALID_FS)) |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 1820 | ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " |
| 1821 | "running e2fsck is recommended"); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1822 | else if ((sbi->s_mount_state & EXT4_ERROR_FS)) |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 1823 | ext4_msg(sb, KERN_WARNING, |
| 1824 | "warning: mounting fs with errors, " |
| 1825 | "running e2fsck is recommended"); |
Tao Ma | ed3ce80 | 2011-05-18 13:29:57 -0400 | [diff] [blame] | 1826 | else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1827 | le16_to_cpu(es->s_mnt_count) >= |
| 1828 | (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 1829 | ext4_msg(sb, KERN_WARNING, |
| 1830 | "warning: maximal mount count reached, " |
| 1831 | "running e2fsck is recommended"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1832 | else if (le32_to_cpu(es->s_checkinterval) && |
| 1833 | (le32_to_cpu(es->s_lastcheck) + |
| 1834 | le32_to_cpu(es->s_checkinterval) <= get_seconds())) |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 1835 | ext4_msg(sb, KERN_WARNING, |
| 1836 | "warning: checktime reached, " |
| 1837 | "running e2fsck is recommended"); |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 1838 | if (!sbi->s_journal) |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 1839 | es->s_state &= cpu_to_le16(~EXT4_VALID_FS); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1840 | if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1841 | 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] | 1842 | le16_add_cpu(&es->s_mnt_count, 1); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1843 | es->s_mtime = cpu_to_le32(get_seconds()); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1844 | ext4_update_dynamic_rev(sb); |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 1845 | if (sbi->s_journal) |
| 1846 | EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1847 | |
Theodore Ts'o | e2d6705 | 2009-05-01 00:33:44 -0400 | [diff] [blame] | 1848 | ext4_commit_super(sb, 1); |
Theodore Ts'o | 281b599 | 2011-09-09 18:34:51 -0400 | [diff] [blame] | 1849 | done: |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1850 | if (test_opt(sb, DEBUG)) |
Theodore Ts'o | a9df9a4 | 2009-01-05 22:18:16 -0500 | [diff] [blame] | 1851 | printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " |
Theodore Ts'o | a2595b8 | 2010-12-15 20:30:48 -0500 | [diff] [blame] | 1852 | "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1853 | sb->s_blocksize, |
| 1854 | sbi->s_groups_count, |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1855 | EXT4_BLOCKS_PER_GROUP(sb), |
| 1856 | EXT4_INODES_PER_GROUP(sb), |
Theodore Ts'o | a2595b8 | 2010-12-15 20:30:48 -0500 | [diff] [blame] | 1857 | sbi->s_mount_opt, sbi->s_mount_opt2); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1858 | |
Dan Magenheimer | 7abc52c | 2011-05-26 10:02:03 -0600 | [diff] [blame] | 1859 | cleancache_init_fs(sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1860 | return res; |
| 1861 | } |
| 1862 | |
Jose R. Santos | 772cb7c | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 1863 | static int ext4_fill_flex_info(struct super_block *sb) |
| 1864 | { |
| 1865 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
| 1866 | struct ext4_group_desc *gdp = NULL; |
Jose R. Santos | 772cb7c | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 1867 | ext4_group_t flex_group_count; |
| 1868 | ext4_group_t flex_group; |
Xi Wang | d50f2ab | 2012-01-10 11:51:10 -0500 | [diff] [blame] | 1869 | unsigned int groups_per_flex = 0; |
Theodore Ts'o | c5ca7c7 | 2009-04-27 22:48:48 -0400 | [diff] [blame] | 1870 | size_t size; |
Jose R. Santos | 772cb7c | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 1871 | int i; |
| 1872 | |
Theodore Ts'o | 503358a | 2009-11-23 07:24:46 -0500 | [diff] [blame] | 1873 | 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] | 1874 | 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] | 1875 | sbi->s_log_groups_per_flex = 0; |
| 1876 | return 1; |
| 1877 | } |
Xi Wang | d50f2ab | 2012-01-10 11:51:10 -0500 | [diff] [blame] | 1878 | groups_per_flex = 1 << sbi->s_log_groups_per_flex; |
Jose R. Santos | 772cb7c | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 1879 | |
Frederic Bohe | c62a11f | 2008-09-08 10:20:24 -0400 | [diff] [blame] | 1880 | /* We allocate both existing and potentially added groups */ |
| 1881 | flex_group_count = ((sbi->s_groups_count + groups_per_flex - 1) + |
Aneesh Kumar K.V | d94e99a | 2008-11-04 09:11:26 -0500 | [diff] [blame] | 1882 | ((le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) + 1) << |
| 1883 | EXT4_DESC_PER_BLOCK_BITS(sb))) / groups_per_flex; |
Theodore Ts'o | c5ca7c7 | 2009-04-27 22:48:48 -0400 | [diff] [blame] | 1884 | size = flex_group_count * sizeof(struct flex_groups); |
Theodore Ts'o | 9933fc0 | 2011-08-01 08:45:02 -0400 | [diff] [blame] | 1885 | sbi->s_flex_groups = ext4_kvzalloc(size, GFP_KERNEL); |
Theodore Ts'o | c5ca7c7 | 2009-04-27 22:48:48 -0400 | [diff] [blame] | 1886 | if (sbi->s_flex_groups == NULL) { |
Theodore Ts'o | 9933fc0 | 2011-08-01 08:45:02 -0400 | [diff] [blame] | 1887 | ext4_msg(sb, KERN_ERR, "not enough memory for %u flex groups", |
| 1888 | flex_group_count); |
| 1889 | goto failed; |
Jose R. Santos | 772cb7c | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 1890 | } |
Jose R. Santos | 772cb7c | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 1891 | |
Jose R. Santos | 772cb7c | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 1892 | for (i = 0; i < sbi->s_groups_count; i++) { |
Theodore Ts'o | 88b6edd | 2009-05-25 11:50:39 -0400 | [diff] [blame] | 1893 | gdp = ext4_get_group_desc(sb, i, NULL); |
Jose R. Santos | 772cb7c | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 1894 | |
| 1895 | flex_group = ext4_flex_group(sbi, i); |
Theodore Ts'o | 7ad9bb6 | 2009-09-11 16:51:28 -0400 | [diff] [blame] | 1896 | atomic_add(ext4_free_inodes_count(sb, gdp), |
| 1897 | &sbi->s_flex_groups[flex_group].free_inodes); |
Theodore Ts'o | 021b65b | 2011-09-09 19:08:51 -0400 | [diff] [blame] | 1898 | atomic_add(ext4_free_group_clusters(sb, gdp), |
Theodore Ts'o | 24aaa8e | 2011-09-09 18:58:51 -0400 | [diff] [blame] | 1899 | &sbi->s_flex_groups[flex_group].free_clusters); |
Theodore Ts'o | 7ad9bb6 | 2009-09-11 16:51:28 -0400 | [diff] [blame] | 1900 | atomic_add(ext4_used_dirs_count(sb, gdp), |
| 1901 | &sbi->s_flex_groups[flex_group].used_dirs); |
Jose R. Santos | 772cb7c | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 1902 | } |
| 1903 | |
| 1904 | return 1; |
| 1905 | failed: |
| 1906 | return 0; |
| 1907 | } |
| 1908 | |
Andreas Dilger | 717d50e | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 1909 | __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group, |
| 1910 | struct ext4_group_desc *gdp) |
| 1911 | { |
| 1912 | __u16 crc = 0; |
| 1913 | |
| 1914 | if (sbi->s_es->s_feature_ro_compat & |
| 1915 | cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) { |
| 1916 | int offset = offsetof(struct ext4_group_desc, bg_checksum); |
| 1917 | __le32 le_group = cpu_to_le32(block_group); |
| 1918 | |
| 1919 | crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); |
| 1920 | crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); |
| 1921 | crc = crc16(crc, (__u8 *)gdp, offset); |
| 1922 | offset += sizeof(gdp->bg_checksum); /* skip checksum */ |
| 1923 | /* for checksum of struct ext4_group_desc do the rest...*/ |
| 1924 | if ((sbi->s_es->s_feature_incompat & |
| 1925 | cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT)) && |
| 1926 | offset < le16_to_cpu(sbi->s_es->s_desc_size)) |
| 1927 | crc = crc16(crc, (__u8 *)gdp + offset, |
| 1928 | le16_to_cpu(sbi->s_es->s_desc_size) - |
| 1929 | offset); |
| 1930 | } |
| 1931 | |
| 1932 | return cpu_to_le16(crc); |
| 1933 | } |
| 1934 | |
| 1935 | int ext4_group_desc_csum_verify(struct ext4_sb_info *sbi, __u32 block_group, |
| 1936 | struct ext4_group_desc *gdp) |
| 1937 | { |
| 1938 | if ((sbi->s_es->s_feature_ro_compat & |
| 1939 | cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) && |
| 1940 | (gdp->bg_checksum != ext4_group_desc_csum(sbi, block_group, gdp))) |
| 1941 | return 0; |
| 1942 | |
| 1943 | return 1; |
| 1944 | } |
| 1945 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1946 | /* Called at mount-time, super-block is locked */ |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 1947 | static int ext4_check_descriptors(struct super_block *sb, |
| 1948 | ext4_group_t *first_not_zeroed) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1949 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1950 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
| 1951 | ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); |
| 1952 | ext4_fsblk_t last_block; |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 1953 | ext4_fsblk_t block_bitmap; |
| 1954 | ext4_fsblk_t inode_bitmap; |
| 1955 | ext4_fsblk_t inode_table; |
Jose R. Santos | ce42158 | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 1956 | int flexbg_flag = 0; |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 1957 | ext4_group_t i, grp = sbi->s_groups_count; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1958 | |
Jose R. Santos | ce42158 | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 1959 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) |
| 1960 | flexbg_flag = 1; |
| 1961 | |
Theodore Ts'o | af5bc92 | 2008-09-08 22:25:24 -0400 | [diff] [blame] | 1962 | ext4_debug("Checking group descriptors"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1963 | |
Akinobu Mita | 197cd65a | 2008-02-06 01:40:16 -0800 | [diff] [blame] | 1964 | for (i = 0; i < sbi->s_groups_count; i++) { |
| 1965 | struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); |
| 1966 | |
Jose R. Santos | ce42158 | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 1967 | if (i == sbi->s_groups_count - 1 || flexbg_flag) |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 1968 | last_block = ext4_blocks_count(sbi->s_es) - 1; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1969 | else |
| 1970 | last_block = first_block + |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1971 | (EXT4_BLOCKS_PER_GROUP(sb) - 1); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1972 | |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 1973 | if ((grp == sbi->s_groups_count) && |
| 1974 | !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) |
| 1975 | grp = i; |
| 1976 | |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 1977 | block_bitmap = ext4_block_bitmap(sb, gdp); |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 1978 | if (block_bitmap < first_block || block_bitmap > last_block) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 1979 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
Theodore Ts'o | a9df9a4 | 2009-01-05 22:18:16 -0500 | [diff] [blame] | 1980 | "Block bitmap for group %u not in group " |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 1981 | "(block %llu)!", i, block_bitmap); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1982 | return 0; |
| 1983 | } |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 1984 | inode_bitmap = ext4_inode_bitmap(sb, gdp); |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 1985 | if (inode_bitmap < first_block || inode_bitmap > last_block) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 1986 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
Theodore Ts'o | a9df9a4 | 2009-01-05 22:18:16 -0500 | [diff] [blame] | 1987 | "Inode bitmap for group %u not in group " |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 1988 | "(block %llu)!", i, inode_bitmap); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1989 | return 0; |
| 1990 | } |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 1991 | inode_table = ext4_inode_table(sb, gdp); |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 1992 | if (inode_table < first_block || |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 1993 | inode_table + sbi->s_itb_per_group - 1 > last_block) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 1994 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
Theodore Ts'o | a9df9a4 | 2009-01-05 22:18:16 -0500 | [diff] [blame] | 1995 | "Inode table for group %u not in group " |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 1996 | "(block %llu)!", i, inode_table); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1997 | return 0; |
| 1998 | } |
Aneesh Kumar K.V | 955ce5f | 2009-05-02 20:35:09 -0400 | [diff] [blame] | 1999 | ext4_lock_group(sb, i); |
Andreas Dilger | 717d50e | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 2000 | if (!ext4_group_desc_csum_verify(sbi, i, gdp)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 2001 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
| 2002 | "Checksum for group %u failed (%u!=%u)", |
| 2003 | i, le16_to_cpu(ext4_group_desc_csum(sbi, i, |
| 2004 | gdp)), le16_to_cpu(gdp->bg_checksum)); |
Li Zefan | 7ee1ec4 | 2008-09-08 10:47:19 -0400 | [diff] [blame] | 2005 | if (!(sb->s_flags & MS_RDONLY)) { |
Aneesh Kumar K.V | 955ce5f | 2009-05-02 20:35:09 -0400 | [diff] [blame] | 2006 | ext4_unlock_group(sb, i); |
Theodore Ts'o | 8a26646 | 2008-07-26 14:34:21 -0400 | [diff] [blame] | 2007 | return 0; |
Li Zefan | 7ee1ec4 | 2008-09-08 10:47:19 -0400 | [diff] [blame] | 2008 | } |
Andreas Dilger | 717d50e | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 2009 | } |
Aneesh Kumar K.V | 955ce5f | 2009-05-02 20:35:09 -0400 | [diff] [blame] | 2010 | ext4_unlock_group(sb, i); |
Jose R. Santos | ce42158 | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 2011 | if (!flexbg_flag) |
| 2012 | first_block += EXT4_BLOCKS_PER_GROUP(sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2013 | } |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2014 | if (NULL != first_not_zeroed) |
| 2015 | *first_not_zeroed = grp; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2016 | |
Theodore Ts'o | 5dee543 | 2011-09-09 19:10:51 -0400 | [diff] [blame] | 2017 | ext4_free_blocks_count_set(sbi->s_es, |
| 2018 | EXT4_C2B(sbi, ext4_count_free_clusters(sb))); |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 2019 | sbi->s_es->s_free_inodes_count =cpu_to_le32(ext4_count_free_inodes(sb)); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2020 | return 1; |
| 2021 | } |
| 2022 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2023 | /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2024 | * the superblock) which were deleted from all directories, but held open by |
| 2025 | * a process at the time of a crash. We walk the list and try to delete these |
| 2026 | * inodes at recovery time (only with a read-write filesystem). |
| 2027 | * |
| 2028 | * In order to keep the orphan inode chain consistent during traversal (in |
| 2029 | * case of crash during recovery), we link each inode into the superblock |
| 2030 | * orphan list_head and handle it the same way as an inode deletion during |
| 2031 | * normal operation (which journals the operations for us). |
| 2032 | * |
| 2033 | * We only do an iget() and an iput() on each inode, which is very safe if we |
| 2034 | * accidentally point at an in-use or already deleted inode. The worst that |
| 2035 | * 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] | 2036 | * 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] | 2037 | * e2fsck was run on this filesystem, and it must have already done the orphan |
| 2038 | * inode cleanup for us, so we can safely abort without any further action. |
| 2039 | */ |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 2040 | static void ext4_orphan_cleanup(struct super_block *sb, |
| 2041 | struct ext4_super_block *es) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2042 | { |
| 2043 | unsigned int s_flags = sb->s_flags; |
| 2044 | int nr_orphans = 0, nr_truncates = 0; |
| 2045 | #ifdef CONFIG_QUOTA |
| 2046 | int i; |
| 2047 | #endif |
| 2048 | if (!es->s_last_orphan) { |
| 2049 | jbd_debug(4, "no orphan inodes to clean up\n"); |
| 2050 | return; |
| 2051 | } |
| 2052 | |
Eric Sandeen | a8f48a9 | 2006-12-06 20:40:13 -0800 | [diff] [blame] | 2053 | if (bdev_read_only(sb->s_bdev)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 2054 | ext4_msg(sb, KERN_ERR, "write access " |
| 2055 | "unavailable, skipping orphan cleanup"); |
Eric Sandeen | a8f48a9 | 2006-12-06 20:40:13 -0800 | [diff] [blame] | 2056 | return; |
| 2057 | } |
| 2058 | |
Amir Goldstein | d39195c | 2011-02-28 00:53:45 -0500 | [diff] [blame] | 2059 | /* Check if feature set would not allow a r/w mount */ |
| 2060 | if (!ext4_feature_set_ok(sb, 0)) { |
| 2061 | ext4_msg(sb, KERN_INFO, "Skipping orphan cleanup due to " |
| 2062 | "unknown ROCOMPAT features"); |
| 2063 | return; |
| 2064 | } |
| 2065 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2066 | if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2067 | if (es->s_last_orphan) |
| 2068 | jbd_debug(1, "Errors on filesystem, " |
| 2069 | "clearing orphan list.\n"); |
| 2070 | es->s_last_orphan = 0; |
| 2071 | jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); |
| 2072 | return; |
| 2073 | } |
| 2074 | |
| 2075 | if (s_flags & MS_RDONLY) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 2076 | ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2077 | sb->s_flags &= ~MS_RDONLY; |
| 2078 | } |
| 2079 | #ifdef CONFIG_QUOTA |
| 2080 | /* Needed for iput() to work correctly and not trash data */ |
| 2081 | sb->s_flags |= MS_ACTIVE; |
| 2082 | /* Turn on quotas so that they are updated correctly */ |
| 2083 | for (i = 0; i < MAXQUOTAS; i++) { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2084 | if (EXT4_SB(sb)->s_qf_names[i]) { |
| 2085 | int ret = ext4_quota_on_mount(sb, i); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2086 | if (ret < 0) |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 2087 | ext4_msg(sb, KERN_ERR, |
| 2088 | "Cannot turn on journaled " |
| 2089 | "quota: error %d", ret); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2090 | } |
| 2091 | } |
| 2092 | #endif |
| 2093 | |
| 2094 | while (es->s_last_orphan) { |
| 2095 | struct inode *inode; |
| 2096 | |
Josef Bacik | 97bd42b | 2008-04-29 22:04:56 -0400 | [diff] [blame] | 2097 | inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); |
| 2098 | if (IS_ERR(inode)) { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2099 | es->s_last_orphan = 0; |
| 2100 | break; |
| 2101 | } |
| 2102 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2103 | list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); |
Christoph Hellwig | 871a293 | 2010-03-03 09:05:07 -0500 | [diff] [blame] | 2104 | dquot_initialize(inode); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2105 | if (inode->i_nlink) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 2106 | ext4_msg(sb, KERN_DEBUG, |
| 2107 | "%s: truncating inode %lu to %lld bytes", |
Harvey Harrison | 46e665e | 2008-04-17 10:38:59 -0400 | [diff] [blame] | 2108 | __func__, inode->i_ino, inode->i_size); |
Theodore Ts'o | e5f8eab8 | 2008-09-08 22:25:04 -0400 | [diff] [blame] | 2109 | jbd_debug(2, "truncating inode %lu to %lld bytes\n", |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2110 | inode->i_ino, inode->i_size); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2111 | ext4_truncate(inode); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2112 | nr_truncates++; |
| 2113 | } else { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 2114 | ext4_msg(sb, KERN_DEBUG, |
| 2115 | "%s: deleting unreferenced inode %lu", |
Harvey Harrison | 46e665e | 2008-04-17 10:38:59 -0400 | [diff] [blame] | 2116 | __func__, inode->i_ino); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2117 | jbd_debug(2, "deleting unreferenced inode %lu\n", |
| 2118 | inode->i_ino); |
| 2119 | nr_orphans++; |
| 2120 | } |
| 2121 | iput(inode); /* The delete magic happens here! */ |
| 2122 | } |
| 2123 | |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 2124 | #define PLURAL(x) (x), ((x) == 1) ? "" : "s" |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2125 | |
| 2126 | if (nr_orphans) |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 2127 | ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", |
| 2128 | PLURAL(nr_orphans)); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2129 | if (nr_truncates) |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 2130 | ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", |
| 2131 | PLURAL(nr_truncates)); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2132 | #ifdef CONFIG_QUOTA |
| 2133 | /* Turn quotas off */ |
| 2134 | for (i = 0; i < MAXQUOTAS; i++) { |
| 2135 | if (sb_dqopt(sb)->files[i]) |
Christoph Hellwig | 287a809 | 2010-05-19 07:16:45 -0400 | [diff] [blame] | 2136 | dquot_quota_off(sb, i); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2137 | } |
| 2138 | #endif |
| 2139 | sb->s_flags = s_flags; /* Restore MS_RDONLY status */ |
| 2140 | } |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 2141 | |
Eric Sandeen | cd2291a | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 2142 | /* |
| 2143 | * Maximal extent format file size. |
| 2144 | * Resulting logical blkno at s_maxbytes must fit in our on-disk |
| 2145 | * extent format containers, within a sector_t, and within i_blocks |
| 2146 | * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, |
| 2147 | * so that won't be a limiting factor. |
| 2148 | * |
Lukas Czerner | f17722f | 2011-06-06 00:05:17 -0400 | [diff] [blame] | 2149 | * However there is other limiting factor. We do store extents in the form |
| 2150 | * of starting block and length, hence the resulting length of the extent |
| 2151 | * covering maximum file size must fit into on-disk format containers as |
| 2152 | * well. Given that length is always by 1 unit bigger than max unit (because |
| 2153 | * we count 0 as well) we have to lower the s_maxbytes by one fs block. |
| 2154 | * |
Eric Sandeen | cd2291a | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 2155 | * Note, this does *not* consider any metadata overhead for vfs i_blocks. |
| 2156 | */ |
Theodore Ts'o | f287a1a | 2008-10-16 22:50:48 -0400 | [diff] [blame] | 2157 | static loff_t ext4_max_size(int blkbits, int has_huge_files) |
Eric Sandeen | cd2291a | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 2158 | { |
| 2159 | loff_t res; |
| 2160 | loff_t upper_limit = MAX_LFS_FILESIZE; |
| 2161 | |
| 2162 | /* small i_blocks in vfs inode? */ |
Theodore Ts'o | f287a1a | 2008-10-16 22:50:48 -0400 | [diff] [blame] | 2163 | if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { |
Eric Sandeen | cd2291a | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 2164 | /* |
Bartlomiej Zolnierkiewicz | 90c699a | 2009-06-19 08:08:50 +0200 | [diff] [blame] | 2165 | * CONFIG_LBDAF is not enabled implies the inode |
Eric Sandeen | cd2291a | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 2166 | * i_block represent total blocks in 512 bytes |
| 2167 | * 32 == size of vfs inode i_blocks * 8 |
| 2168 | */ |
| 2169 | upper_limit = (1LL << 32) - 1; |
| 2170 | |
| 2171 | /* total blocks in file system block size */ |
| 2172 | upper_limit >>= (blkbits - 9); |
| 2173 | upper_limit <<= blkbits; |
| 2174 | } |
| 2175 | |
Lukas Czerner | f17722f | 2011-06-06 00:05:17 -0400 | [diff] [blame] | 2176 | /* |
| 2177 | * 32-bit extent-start container, ee_block. We lower the maxbytes |
| 2178 | * by one fs block, so ee_len can cover the extent of maximum file |
| 2179 | * size |
| 2180 | */ |
| 2181 | res = (1LL << 32) - 1; |
Eric Sandeen | cd2291a | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 2182 | res <<= blkbits; |
Eric Sandeen | cd2291a | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 2183 | |
| 2184 | /* Sanity check against vm- & vfs- imposed limits */ |
| 2185 | if (res > upper_limit) |
| 2186 | res = upper_limit; |
| 2187 | |
| 2188 | return res; |
| 2189 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2190 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2191 | /* |
Eric Sandeen | cd2291a | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 2192 | * 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] | 2193 | * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. |
| 2194 | * 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] | 2195 | */ |
Theodore Ts'o | f287a1a | 2008-10-16 22:50:48 -0400 | [diff] [blame] | 2196 | 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] | 2197 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2198 | loff_t res = EXT4_NDIR_BLOCKS; |
Aneesh Kumar K.V | 0fc1b45 | 2008-01-28 23:58:26 -0500 | [diff] [blame] | 2199 | int meta_blocks; |
| 2200 | loff_t upper_limit; |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 2201 | /* This is calculated to be the largest file size for a dense, block |
| 2202 | * mapped file such that the file's total number of 512-byte sectors, |
| 2203 | * including data and all indirect blocks, does not exceed (2^48 - 1). |
| 2204 | * |
| 2205 | * __u32 i_blocks_lo and _u16 i_blocks_high represent the total |
| 2206 | * number of 512-byte sectors of the file. |
Aneesh Kumar K.V | 0fc1b45 | 2008-01-28 23:58:26 -0500 | [diff] [blame] | 2207 | */ |
| 2208 | |
Theodore Ts'o | f287a1a | 2008-10-16 22:50:48 -0400 | [diff] [blame] | 2209 | if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { |
Aneesh Kumar K.V | 0fc1b45 | 2008-01-28 23:58:26 -0500 | [diff] [blame] | 2210 | /* |
Bartlomiej Zolnierkiewicz | 90c699a | 2009-06-19 08:08:50 +0200 | [diff] [blame] | 2211 | * !has_huge_files or CONFIG_LBDAF not enabled implies that |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 2212 | * the inode i_block field represents total file blocks in |
| 2213 | * 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] | 2214 | */ |
| 2215 | upper_limit = (1LL << 32) - 1; |
| 2216 | |
| 2217 | /* total blocks in file system block size */ |
| 2218 | upper_limit >>= (bits - 9); |
| 2219 | |
| 2220 | } else { |
Aneesh Kumar K.V | 8180a56 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 2221 | /* |
| 2222 | * We use 48 bit ext4_inode i_blocks |
| 2223 | * With EXT4_HUGE_FILE_FL set the i_blocks |
| 2224 | * represent total number of blocks in |
| 2225 | * file system block size |
| 2226 | */ |
Aneesh Kumar K.V | 0fc1b45 | 2008-01-28 23:58:26 -0500 | [diff] [blame] | 2227 | upper_limit = (1LL << 48) - 1; |
| 2228 | |
Aneesh Kumar K.V | 0fc1b45 | 2008-01-28 23:58:26 -0500 | [diff] [blame] | 2229 | } |
| 2230 | |
| 2231 | /* indirect blocks */ |
| 2232 | meta_blocks = 1; |
| 2233 | /* double indirect blocks */ |
| 2234 | meta_blocks += 1 + (1LL << (bits-2)); |
| 2235 | /* tripple indirect blocks */ |
| 2236 | meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); |
| 2237 | |
| 2238 | upper_limit -= meta_blocks; |
| 2239 | upper_limit <<= bits; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2240 | |
| 2241 | res += 1LL << (bits-2); |
| 2242 | res += 1LL << (2*(bits-2)); |
| 2243 | res += 1LL << (3*(bits-2)); |
| 2244 | res <<= bits; |
| 2245 | if (res > upper_limit) |
| 2246 | res = upper_limit; |
Aneesh Kumar K.V | 0fc1b45 | 2008-01-28 23:58:26 -0500 | [diff] [blame] | 2247 | |
| 2248 | if (res > MAX_LFS_FILESIZE) |
| 2249 | res = MAX_LFS_FILESIZE; |
| 2250 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2251 | return res; |
| 2252 | } |
| 2253 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2254 | static ext4_fsblk_t descriptor_loc(struct super_block *sb, |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 2255 | ext4_fsblk_t logical_sb_block, int nr) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2256 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2257 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
Avantika Mathur | fd2d429 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 2258 | ext4_group_t bg, first_meta_bg; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2259 | int has_super = 0; |
| 2260 | |
| 2261 | first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); |
| 2262 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2263 | if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2264 | nr < first_meta_bg) |
Andrew Morton | 70bbb3e | 2006-10-11 01:21:20 -0700 | [diff] [blame] | 2265 | return logical_sb_block + nr + 1; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2266 | bg = sbi->s_desc_per_block * nr; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2267 | if (ext4_bg_has_super(sb, bg)) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2268 | has_super = 1; |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 2269 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2270 | return (has_super + ext4_group_first_block_no(sb, bg)); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2271 | } |
| 2272 | |
Alex Tomas | c9de560 | 2008-01-29 00:19:52 -0500 | [diff] [blame] | 2273 | /** |
| 2274 | * ext4_get_stripe_size: Get the stripe size. |
| 2275 | * @sbi: In memory super block info |
| 2276 | * |
| 2277 | * If we have specified it via mount option, then |
| 2278 | * use the mount option value. If the value specified at mount time is |
| 2279 | * greater than the blocks per group use the super block value. |
| 2280 | * If the super block value is greater than blocks per group return 0. |
| 2281 | * Allocator needs it be less than blocks per group. |
| 2282 | * |
| 2283 | */ |
| 2284 | static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) |
| 2285 | { |
| 2286 | unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); |
| 2287 | unsigned long stripe_width = |
| 2288 | le32_to_cpu(sbi->s_es->s_raid_stripe_width); |
Dan Ehrenberg | 3eb0865 | 2011-07-17 21:18:51 -0400 | [diff] [blame] | 2289 | int ret; |
Alex Tomas | c9de560 | 2008-01-29 00:19:52 -0500 | [diff] [blame] | 2290 | |
| 2291 | if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) |
Dan Ehrenberg | 3eb0865 | 2011-07-17 21:18:51 -0400 | [diff] [blame] | 2292 | ret = sbi->s_stripe; |
| 2293 | else if (stripe_width <= sbi->s_blocks_per_group) |
| 2294 | ret = stripe_width; |
| 2295 | else if (stride <= sbi->s_blocks_per_group) |
| 2296 | ret = stride; |
| 2297 | else |
| 2298 | ret = 0; |
Alex Tomas | c9de560 | 2008-01-29 00:19:52 -0500 | [diff] [blame] | 2299 | |
Dan Ehrenberg | 3eb0865 | 2011-07-17 21:18:51 -0400 | [diff] [blame] | 2300 | /* |
| 2301 | * If the stripe width is 1, this makes no sense and |
| 2302 | * we set it to 0 to turn off stripe handling code. |
| 2303 | */ |
| 2304 | if (ret <= 1) |
| 2305 | ret = 0; |
Alex Tomas | c9de560 | 2008-01-29 00:19:52 -0500 | [diff] [blame] | 2306 | |
Dan Ehrenberg | 3eb0865 | 2011-07-17 21:18:51 -0400 | [diff] [blame] | 2307 | return ret; |
Alex Tomas | c9de560 | 2008-01-29 00:19:52 -0500 | [diff] [blame] | 2308 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2309 | |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 2310 | /* sysfs supprt */ |
| 2311 | |
| 2312 | struct ext4_attr { |
| 2313 | struct attribute attr; |
| 2314 | ssize_t (*show)(struct ext4_attr *, struct ext4_sb_info *, char *); |
Theodore Ts'o | 60e6679 | 2010-05-17 07:00:00 -0400 | [diff] [blame] | 2315 | ssize_t (*store)(struct ext4_attr *, struct ext4_sb_info *, |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 2316 | const char *, size_t); |
| 2317 | int offset; |
| 2318 | }; |
| 2319 | |
| 2320 | static int parse_strtoul(const char *buf, |
| 2321 | unsigned long max, unsigned long *value) |
| 2322 | { |
| 2323 | char *endp; |
| 2324 | |
André Goddard Rosa | e7d2860 | 2009-12-14 18:01:06 -0800 | [diff] [blame] | 2325 | *value = simple_strtoul(skip_spaces(buf), &endp, 0); |
| 2326 | endp = skip_spaces(endp); |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 2327 | if (*endp || *value > max) |
| 2328 | return -EINVAL; |
| 2329 | |
| 2330 | return 0; |
| 2331 | } |
| 2332 | |
| 2333 | static ssize_t delayed_allocation_blocks_show(struct ext4_attr *a, |
| 2334 | struct ext4_sb_info *sbi, |
| 2335 | char *buf) |
| 2336 | { |
| 2337 | return snprintf(buf, PAGE_SIZE, "%llu\n", |
Aditya Kali | 7b415bf | 2011-09-09 19:04:51 -0400 | [diff] [blame] | 2338 | (s64) EXT4_C2B(sbi, |
| 2339 | percpu_counter_sum(&sbi->s_dirtyclusters_counter))); |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 2340 | } |
| 2341 | |
| 2342 | static ssize_t session_write_kbytes_show(struct ext4_attr *a, |
| 2343 | struct ext4_sb_info *sbi, char *buf) |
| 2344 | { |
| 2345 | struct super_block *sb = sbi->s_buddy_cache->i_sb; |
| 2346 | |
Theodore Ts'o | f613dfc | 2010-07-27 11:56:08 -0400 | [diff] [blame] | 2347 | if (!sb->s_bdev->bd_part) |
| 2348 | return snprintf(buf, PAGE_SIZE, "0\n"); |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 2349 | return snprintf(buf, PAGE_SIZE, "%lu\n", |
| 2350 | (part_stat_read(sb->s_bdev->bd_part, sectors[1]) - |
| 2351 | sbi->s_sectors_written_start) >> 1); |
| 2352 | } |
| 2353 | |
| 2354 | static ssize_t lifetime_write_kbytes_show(struct ext4_attr *a, |
| 2355 | struct ext4_sb_info *sbi, char *buf) |
| 2356 | { |
| 2357 | struct super_block *sb = sbi->s_buddy_cache->i_sb; |
| 2358 | |
Theodore Ts'o | f613dfc | 2010-07-27 11:56:08 -0400 | [diff] [blame] | 2359 | if (!sb->s_bdev->bd_part) |
| 2360 | return snprintf(buf, PAGE_SIZE, "0\n"); |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 2361 | return snprintf(buf, PAGE_SIZE, "%llu\n", |
Andrew Morton | a6b43e3 | 2009-12-23 07:48:08 -0500 | [diff] [blame] | 2362 | (unsigned long long)(sbi->s_kbytes_written + |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 2363 | ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - |
Andrew Morton | a6b43e3 | 2009-12-23 07:48:08 -0500 | [diff] [blame] | 2364 | EXT4_SB(sb)->s_sectors_written_start) >> 1))); |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 2365 | } |
| 2366 | |
| 2367 | static ssize_t inode_readahead_blks_store(struct ext4_attr *a, |
| 2368 | struct ext4_sb_info *sbi, |
| 2369 | const char *buf, size_t count) |
| 2370 | { |
| 2371 | unsigned long t; |
| 2372 | |
| 2373 | if (parse_strtoul(buf, 0x40000000, &t)) |
| 2374 | return -EINVAL; |
| 2375 | |
Alexander V. Lukyanov | 5dbd571 | 2011-02-21 21:33:21 -0500 | [diff] [blame] | 2376 | if (t && !is_power_of_2(t)) |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 2377 | return -EINVAL; |
| 2378 | |
| 2379 | sbi->s_inode_readahead_blks = t; |
| 2380 | return count; |
| 2381 | } |
| 2382 | |
| 2383 | static ssize_t sbi_ui_show(struct ext4_attr *a, |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 2384 | struct ext4_sb_info *sbi, char *buf) |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 2385 | { |
| 2386 | unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); |
| 2387 | |
| 2388 | return snprintf(buf, PAGE_SIZE, "%u\n", *ui); |
| 2389 | } |
| 2390 | |
| 2391 | static ssize_t sbi_ui_store(struct ext4_attr *a, |
| 2392 | struct ext4_sb_info *sbi, |
| 2393 | const char *buf, size_t count) |
| 2394 | { |
| 2395 | unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); |
| 2396 | unsigned long t; |
| 2397 | |
| 2398 | if (parse_strtoul(buf, 0xffffffff, &t)) |
| 2399 | return -EINVAL; |
| 2400 | *ui = t; |
| 2401 | return count; |
| 2402 | } |
| 2403 | |
| 2404 | #define EXT4_ATTR_OFFSET(_name,_mode,_show,_store,_elname) \ |
| 2405 | static struct ext4_attr ext4_attr_##_name = { \ |
| 2406 | .attr = {.name = __stringify(_name), .mode = _mode }, \ |
| 2407 | .show = _show, \ |
| 2408 | .store = _store, \ |
| 2409 | .offset = offsetof(struct ext4_sb_info, _elname), \ |
| 2410 | } |
| 2411 | #define EXT4_ATTR(name, mode, show, store) \ |
| 2412 | static struct ext4_attr ext4_attr_##name = __ATTR(name, mode, show, store) |
| 2413 | |
Lukas Czerner | 857ac88 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2414 | #define EXT4_INFO_ATTR(name) EXT4_ATTR(name, 0444, NULL, NULL) |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 2415 | #define EXT4_RO_ATTR(name) EXT4_ATTR(name, 0444, name##_show, NULL) |
| 2416 | #define EXT4_RW_ATTR(name) EXT4_ATTR(name, 0644, name##_show, name##_store) |
| 2417 | #define EXT4_RW_ATTR_SBI_UI(name, elname) \ |
| 2418 | EXT4_ATTR_OFFSET(name, 0644, sbi_ui_show, sbi_ui_store, elname) |
| 2419 | #define ATTR_LIST(name) &ext4_attr_##name.attr |
| 2420 | |
| 2421 | EXT4_RO_ATTR(delayed_allocation_blocks); |
| 2422 | EXT4_RO_ATTR(session_write_kbytes); |
| 2423 | EXT4_RO_ATTR(lifetime_write_kbytes); |
| 2424 | EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, sbi_ui_show, |
| 2425 | inode_readahead_blks_store, s_inode_readahead_blks); |
Andreas Dilger | 1101391 | 2009-06-13 11:45:35 -0400 | [diff] [blame] | 2426 | EXT4_RW_ATTR_SBI_UI(inode_goal, s_inode_goal); |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 2427 | EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats); |
| 2428 | EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan); |
| 2429 | EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan); |
| 2430 | EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs); |
| 2431 | EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request); |
| 2432 | EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc); |
Theodore Ts'o | 55138e0 | 2009-09-29 13:31:31 -0400 | [diff] [blame] | 2433 | EXT4_RW_ATTR_SBI_UI(max_writeback_mb_bump, s_max_writeback_mb_bump); |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 2434 | |
| 2435 | static struct attribute *ext4_attrs[] = { |
| 2436 | ATTR_LIST(delayed_allocation_blocks), |
| 2437 | ATTR_LIST(session_write_kbytes), |
| 2438 | ATTR_LIST(lifetime_write_kbytes), |
| 2439 | ATTR_LIST(inode_readahead_blks), |
Andreas Dilger | 1101391 | 2009-06-13 11:45:35 -0400 | [diff] [blame] | 2440 | ATTR_LIST(inode_goal), |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 2441 | ATTR_LIST(mb_stats), |
| 2442 | ATTR_LIST(mb_max_to_scan), |
| 2443 | ATTR_LIST(mb_min_to_scan), |
| 2444 | ATTR_LIST(mb_order2_req), |
| 2445 | ATTR_LIST(mb_stream_req), |
| 2446 | ATTR_LIST(mb_group_prealloc), |
Theodore Ts'o | 55138e0 | 2009-09-29 13:31:31 -0400 | [diff] [blame] | 2447 | ATTR_LIST(max_writeback_mb_bump), |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 2448 | NULL, |
| 2449 | }; |
| 2450 | |
Lukas Czerner | 857ac88 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2451 | /* Features this copy of ext4 supports */ |
| 2452 | EXT4_INFO_ATTR(lazy_itable_init); |
Lukas Czerner | 27ee40d | 2010-10-27 21:30:12 -0400 | [diff] [blame] | 2453 | EXT4_INFO_ATTR(batched_discard); |
Lukas Czerner | 857ac88 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2454 | |
| 2455 | static struct attribute *ext4_feat_attrs[] = { |
| 2456 | ATTR_LIST(lazy_itable_init), |
Lukas Czerner | 27ee40d | 2010-10-27 21:30:12 -0400 | [diff] [blame] | 2457 | ATTR_LIST(batched_discard), |
Lukas Czerner | 857ac88 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2458 | NULL, |
| 2459 | }; |
| 2460 | |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 2461 | static ssize_t ext4_attr_show(struct kobject *kobj, |
| 2462 | struct attribute *attr, char *buf) |
| 2463 | { |
| 2464 | struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, |
| 2465 | s_kobj); |
| 2466 | struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); |
| 2467 | |
| 2468 | return a->show ? a->show(a, sbi, buf) : 0; |
| 2469 | } |
| 2470 | |
| 2471 | static ssize_t ext4_attr_store(struct kobject *kobj, |
| 2472 | struct attribute *attr, |
| 2473 | const char *buf, size_t len) |
| 2474 | { |
| 2475 | struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, |
| 2476 | s_kobj); |
| 2477 | struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); |
| 2478 | |
| 2479 | return a->store ? a->store(a, sbi, buf, len) : 0; |
| 2480 | } |
| 2481 | |
| 2482 | static void ext4_sb_release(struct kobject *kobj) |
| 2483 | { |
| 2484 | struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, |
| 2485 | s_kobj); |
| 2486 | complete(&sbi->s_kobj_unregister); |
| 2487 | } |
| 2488 | |
Emese Revfy | 52cf25d | 2010-01-19 02:58:23 +0100 | [diff] [blame] | 2489 | static const struct sysfs_ops ext4_attr_ops = { |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 2490 | .show = ext4_attr_show, |
| 2491 | .store = ext4_attr_store, |
| 2492 | }; |
| 2493 | |
| 2494 | static struct kobj_type ext4_ktype = { |
| 2495 | .default_attrs = ext4_attrs, |
| 2496 | .sysfs_ops = &ext4_attr_ops, |
| 2497 | .release = ext4_sb_release, |
| 2498 | }; |
| 2499 | |
Lukas Czerner | 857ac88 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2500 | static void ext4_feat_release(struct kobject *kobj) |
| 2501 | { |
| 2502 | complete(&ext4_feat->f_kobj_unregister); |
| 2503 | } |
| 2504 | |
| 2505 | static struct kobj_type ext4_feat_ktype = { |
| 2506 | .default_attrs = ext4_feat_attrs, |
| 2507 | .sysfs_ops = &ext4_attr_ops, |
| 2508 | .release = ext4_feat_release, |
| 2509 | }; |
| 2510 | |
Eric Sandeen | a13fb1a | 2009-08-18 00:20:23 -0400 | [diff] [blame] | 2511 | /* |
| 2512 | * Check whether this filesystem can be mounted based on |
| 2513 | * the features present and the RDONLY/RDWR mount requested. |
| 2514 | * Returns 1 if this filesystem can be mounted as requested, |
| 2515 | * 0 if it cannot be. |
| 2516 | */ |
| 2517 | static int ext4_feature_set_ok(struct super_block *sb, int readonly) |
| 2518 | { |
| 2519 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP)) { |
| 2520 | ext4_msg(sb, KERN_ERR, |
| 2521 | "Couldn't mount because of " |
| 2522 | "unsupported optional features (%x)", |
| 2523 | (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & |
| 2524 | ~EXT4_FEATURE_INCOMPAT_SUPP)); |
| 2525 | return 0; |
| 2526 | } |
| 2527 | |
| 2528 | if (readonly) |
| 2529 | return 1; |
| 2530 | |
| 2531 | /* Check that feature set is OK for a read-write mount */ |
| 2532 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP)) { |
| 2533 | ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " |
| 2534 | "unsupported optional features (%x)", |
| 2535 | (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & |
| 2536 | ~EXT4_FEATURE_RO_COMPAT_SUPP)); |
| 2537 | return 0; |
| 2538 | } |
| 2539 | /* |
| 2540 | * Large file size enabled file system can only be mounted |
| 2541 | * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF |
| 2542 | */ |
| 2543 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) { |
| 2544 | if (sizeof(blkcnt_t) < sizeof(u64)) { |
| 2545 | ext4_msg(sb, KERN_ERR, "Filesystem with huge files " |
| 2546 | "cannot be mounted RDWR without " |
| 2547 | "CONFIG_LBDAF"); |
| 2548 | return 0; |
| 2549 | } |
| 2550 | } |
Theodore Ts'o | bab08ab | 2011-09-09 18:36:51 -0400 | [diff] [blame] | 2551 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_BIGALLOC) && |
| 2552 | !EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_EXTENTS)) { |
| 2553 | ext4_msg(sb, KERN_ERR, |
| 2554 | "Can't support bigalloc feature without " |
| 2555 | "extents feature\n"); |
| 2556 | return 0; |
| 2557 | } |
Eric Sandeen | a13fb1a | 2009-08-18 00:20:23 -0400 | [diff] [blame] | 2558 | return 1; |
| 2559 | } |
| 2560 | |
Theodore Ts'o | 66e61a9 | 2010-07-27 11:56:04 -0400 | [diff] [blame] | 2561 | /* |
| 2562 | * This function is called once a day if we have errors logged |
| 2563 | * on the file system |
| 2564 | */ |
| 2565 | static void print_daily_error_info(unsigned long arg) |
| 2566 | { |
| 2567 | struct super_block *sb = (struct super_block *) arg; |
| 2568 | struct ext4_sb_info *sbi; |
| 2569 | struct ext4_super_block *es; |
| 2570 | |
| 2571 | sbi = EXT4_SB(sb); |
| 2572 | es = sbi->s_es; |
| 2573 | |
| 2574 | if (es->s_error_count) |
| 2575 | ext4_msg(sb, KERN_NOTICE, "error count: %u", |
| 2576 | le32_to_cpu(es->s_error_count)); |
| 2577 | if (es->s_first_error_time) { |
| 2578 | printk(KERN_NOTICE "EXT4-fs (%s): initial error at %u: %.*s:%d", |
| 2579 | sb->s_id, le32_to_cpu(es->s_first_error_time), |
| 2580 | (int) sizeof(es->s_first_error_func), |
| 2581 | es->s_first_error_func, |
| 2582 | le32_to_cpu(es->s_first_error_line)); |
| 2583 | if (es->s_first_error_ino) |
| 2584 | printk(": inode %u", |
| 2585 | le32_to_cpu(es->s_first_error_ino)); |
| 2586 | if (es->s_first_error_block) |
| 2587 | printk(": block %llu", (unsigned long long) |
| 2588 | le64_to_cpu(es->s_first_error_block)); |
| 2589 | printk("\n"); |
| 2590 | } |
| 2591 | if (es->s_last_error_time) { |
| 2592 | printk(KERN_NOTICE "EXT4-fs (%s): last error at %u: %.*s:%d", |
| 2593 | sb->s_id, le32_to_cpu(es->s_last_error_time), |
| 2594 | (int) sizeof(es->s_last_error_func), |
| 2595 | es->s_last_error_func, |
| 2596 | le32_to_cpu(es->s_last_error_line)); |
| 2597 | if (es->s_last_error_ino) |
| 2598 | printk(": inode %u", |
| 2599 | le32_to_cpu(es->s_last_error_ino)); |
| 2600 | if (es->s_last_error_block) |
| 2601 | printk(": block %llu", (unsigned long long) |
| 2602 | le64_to_cpu(es->s_last_error_block)); |
| 2603 | printk("\n"); |
| 2604 | } |
| 2605 | mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ |
| 2606 | } |
| 2607 | |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2608 | /* Find next suitable group and run ext4_init_inode_table */ |
| 2609 | static int ext4_run_li_request(struct ext4_li_request *elr) |
| 2610 | { |
| 2611 | struct ext4_group_desc *gdp = NULL; |
| 2612 | ext4_group_t group, ngroups; |
| 2613 | struct super_block *sb; |
| 2614 | unsigned long timeout = 0; |
| 2615 | int ret = 0; |
| 2616 | |
| 2617 | sb = elr->lr_super; |
| 2618 | ngroups = EXT4_SB(sb)->s_groups_count; |
| 2619 | |
| 2620 | for (group = elr->lr_next_group; group < ngroups; group++) { |
| 2621 | gdp = ext4_get_group_desc(sb, group, NULL); |
| 2622 | if (!gdp) { |
| 2623 | ret = 1; |
| 2624 | break; |
| 2625 | } |
| 2626 | |
| 2627 | if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) |
| 2628 | break; |
| 2629 | } |
| 2630 | |
| 2631 | if (group == ngroups) |
| 2632 | ret = 1; |
| 2633 | |
| 2634 | if (!ret) { |
| 2635 | timeout = jiffies; |
| 2636 | ret = ext4_init_inode_table(sb, group, |
| 2637 | elr->lr_timeout ? 0 : 1); |
| 2638 | if (elr->lr_timeout == 0) { |
Lukas Czerner | 51ce651 | 2011-05-20 13:55:16 -0400 | [diff] [blame] | 2639 | timeout = (jiffies - timeout) * |
| 2640 | elr->lr_sbi->s_li_wait_mult; |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2641 | elr->lr_timeout = timeout; |
| 2642 | } |
| 2643 | elr->lr_next_sched = jiffies + elr->lr_timeout; |
| 2644 | elr->lr_next_group = group + 1; |
| 2645 | } |
| 2646 | |
| 2647 | return ret; |
| 2648 | } |
| 2649 | |
| 2650 | /* |
| 2651 | * Remove lr_request from the list_request and free the |
Lukas Czerner | 4ed5c03 | 2011-05-20 13:49:04 -0400 | [diff] [blame] | 2652 | * request structure. Should be called with li_list_mtx held |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2653 | */ |
| 2654 | static void ext4_remove_li_request(struct ext4_li_request *elr) |
| 2655 | { |
| 2656 | struct ext4_sb_info *sbi; |
| 2657 | |
| 2658 | if (!elr) |
| 2659 | return; |
| 2660 | |
| 2661 | sbi = elr->lr_sbi; |
| 2662 | |
| 2663 | list_del(&elr->lr_request); |
| 2664 | sbi->s_li_request = NULL; |
| 2665 | kfree(elr); |
| 2666 | } |
| 2667 | |
| 2668 | static void ext4_unregister_li_request(struct super_block *sb) |
| 2669 | { |
Lukas Czerner | 1bb933f | 2011-05-20 13:55:29 -0400 | [diff] [blame] | 2670 | mutex_lock(&ext4_li_mtx); |
| 2671 | if (!ext4_li_info) { |
| 2672 | mutex_unlock(&ext4_li_mtx); |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2673 | return; |
Lukas Czerner | 1bb933f | 2011-05-20 13:55:29 -0400 | [diff] [blame] | 2674 | } |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2675 | |
| 2676 | mutex_lock(&ext4_li_info->li_list_mtx); |
Lukas Czerner | 1bb933f | 2011-05-20 13:55:29 -0400 | [diff] [blame] | 2677 | ext4_remove_li_request(EXT4_SB(sb)->s_li_request); |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2678 | mutex_unlock(&ext4_li_info->li_list_mtx); |
Lukas Czerner | 1bb933f | 2011-05-20 13:55:29 -0400 | [diff] [blame] | 2679 | mutex_unlock(&ext4_li_mtx); |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2680 | } |
| 2681 | |
Eric Sandeen | 8f1f745 | 2011-02-03 14:33:15 -0500 | [diff] [blame] | 2682 | static struct task_struct *ext4_lazyinit_task; |
| 2683 | |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2684 | /* |
| 2685 | * This is the function where ext4lazyinit thread lives. It walks |
| 2686 | * through the request list searching for next scheduled filesystem. |
| 2687 | * When such a fs is found, run the lazy initialization request |
| 2688 | * (ext4_rn_li_request) and keep track of the time spend in this |
| 2689 | * function. Based on that time we compute next schedule time of |
| 2690 | * the request. When walking through the list is complete, compute |
| 2691 | * next waking time and put itself into sleep. |
| 2692 | */ |
| 2693 | static int ext4_lazyinit_thread(void *arg) |
| 2694 | { |
| 2695 | struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; |
| 2696 | struct list_head *pos, *n; |
| 2697 | struct ext4_li_request *elr; |
Lukas Czerner | 4ed5c03 | 2011-05-20 13:49:04 -0400 | [diff] [blame] | 2698 | unsigned long next_wakeup, cur; |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2699 | |
| 2700 | BUG_ON(NULL == eli); |
| 2701 | |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2702 | cont_thread: |
| 2703 | while (true) { |
| 2704 | next_wakeup = MAX_JIFFY_OFFSET; |
| 2705 | |
| 2706 | mutex_lock(&eli->li_list_mtx); |
| 2707 | if (list_empty(&eli->li_request_list)) { |
| 2708 | mutex_unlock(&eli->li_list_mtx); |
| 2709 | goto exit_thread; |
| 2710 | } |
| 2711 | |
| 2712 | list_for_each_safe(pos, n, &eli->li_request_list) { |
| 2713 | elr = list_entry(pos, struct ext4_li_request, |
| 2714 | lr_request); |
| 2715 | |
Theodore Ts'o | b2c78cd | 2010-11-02 14:19:30 -0400 | [diff] [blame] | 2716 | if (time_after_eq(jiffies, elr->lr_next_sched)) { |
| 2717 | if (ext4_run_li_request(elr) != 0) { |
| 2718 | /* error, remove the lazy_init job */ |
| 2719 | ext4_remove_li_request(elr); |
| 2720 | continue; |
| 2721 | } |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2722 | } |
| 2723 | |
| 2724 | if (time_before(elr->lr_next_sched, next_wakeup)) |
| 2725 | next_wakeup = elr->lr_next_sched; |
| 2726 | } |
| 2727 | mutex_unlock(&eli->li_list_mtx); |
| 2728 | |
Tejun Heo | a0acae0 | 2011-11-21 12:32:22 -0800 | [diff] [blame] | 2729 | try_to_freeze(); |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2730 | |
Lukas Czerner | 4ed5c03 | 2011-05-20 13:49:04 -0400 | [diff] [blame] | 2731 | cur = jiffies; |
| 2732 | if ((time_after_eq(cur, next_wakeup)) || |
Lukas Czerner | f4245bd | 2010-11-02 14:07:17 -0400 | [diff] [blame] | 2733 | (MAX_JIFFY_OFFSET == next_wakeup)) { |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2734 | cond_resched(); |
| 2735 | continue; |
| 2736 | } |
| 2737 | |
Lukas Czerner | 4ed5c03 | 2011-05-20 13:49:04 -0400 | [diff] [blame] | 2738 | schedule_timeout_interruptible(next_wakeup - cur); |
| 2739 | |
Eric Sandeen | 8f1f745 | 2011-02-03 14:33:15 -0500 | [diff] [blame] | 2740 | if (kthread_should_stop()) { |
| 2741 | ext4_clear_request_list(); |
| 2742 | goto exit_thread; |
| 2743 | } |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2744 | } |
| 2745 | |
| 2746 | exit_thread: |
| 2747 | /* |
| 2748 | * It looks like the request list is empty, but we need |
| 2749 | * to check it under the li_list_mtx lock, to prevent any |
| 2750 | * additions into it, and of course we should lock ext4_li_mtx |
| 2751 | * to atomically free the list and ext4_li_info, because at |
| 2752 | * this point another ext4 filesystem could be registering |
| 2753 | * new one. |
| 2754 | */ |
| 2755 | mutex_lock(&ext4_li_mtx); |
| 2756 | mutex_lock(&eli->li_list_mtx); |
| 2757 | if (!list_empty(&eli->li_request_list)) { |
| 2758 | mutex_unlock(&eli->li_list_mtx); |
| 2759 | mutex_unlock(&ext4_li_mtx); |
| 2760 | goto cont_thread; |
| 2761 | } |
| 2762 | mutex_unlock(&eli->li_list_mtx); |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2763 | kfree(ext4_li_info); |
| 2764 | ext4_li_info = NULL; |
| 2765 | mutex_unlock(&ext4_li_mtx); |
| 2766 | |
| 2767 | return 0; |
| 2768 | } |
| 2769 | |
| 2770 | static void ext4_clear_request_list(void) |
| 2771 | { |
| 2772 | struct list_head *pos, *n; |
| 2773 | struct ext4_li_request *elr; |
| 2774 | |
| 2775 | mutex_lock(&ext4_li_info->li_list_mtx); |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2776 | list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { |
| 2777 | elr = list_entry(pos, struct ext4_li_request, |
| 2778 | lr_request); |
| 2779 | ext4_remove_li_request(elr); |
| 2780 | } |
| 2781 | mutex_unlock(&ext4_li_info->li_list_mtx); |
| 2782 | } |
| 2783 | |
| 2784 | static int ext4_run_lazyinit_thread(void) |
| 2785 | { |
Eric Sandeen | 8f1f745 | 2011-02-03 14:33:15 -0500 | [diff] [blame] | 2786 | ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, |
| 2787 | ext4_li_info, "ext4lazyinit"); |
| 2788 | if (IS_ERR(ext4_lazyinit_task)) { |
| 2789 | int err = PTR_ERR(ext4_lazyinit_task); |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2790 | ext4_clear_request_list(); |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2791 | kfree(ext4_li_info); |
| 2792 | ext4_li_info = NULL; |
Theodore Ts'o | 92b9781 | 2012-03-19 23:41:49 -0400 | [diff] [blame] | 2793 | printk(KERN_CRIT "EXT4-fs: error %d creating inode table " |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2794 | "initialization thread\n", |
| 2795 | err); |
| 2796 | return err; |
| 2797 | } |
| 2798 | ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2799 | return 0; |
| 2800 | } |
| 2801 | |
| 2802 | /* |
| 2803 | * Check whether it make sense to run itable init. thread or not. |
| 2804 | * If there is at least one uninitialized inode table, return |
| 2805 | * corresponding group number, else the loop goes through all |
| 2806 | * groups and return total number of groups. |
| 2807 | */ |
| 2808 | static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) |
| 2809 | { |
| 2810 | ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; |
| 2811 | struct ext4_group_desc *gdp = NULL; |
| 2812 | |
| 2813 | for (group = 0; group < ngroups; group++) { |
| 2814 | gdp = ext4_get_group_desc(sb, group, NULL); |
| 2815 | if (!gdp) |
| 2816 | continue; |
| 2817 | |
| 2818 | if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) |
| 2819 | break; |
| 2820 | } |
| 2821 | |
| 2822 | return group; |
| 2823 | } |
| 2824 | |
| 2825 | static int ext4_li_info_new(void) |
| 2826 | { |
| 2827 | struct ext4_lazy_init *eli = NULL; |
| 2828 | |
| 2829 | eli = kzalloc(sizeof(*eli), GFP_KERNEL); |
| 2830 | if (!eli) |
| 2831 | return -ENOMEM; |
| 2832 | |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2833 | INIT_LIST_HEAD(&eli->li_request_list); |
| 2834 | mutex_init(&eli->li_list_mtx); |
| 2835 | |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2836 | eli->li_state |= EXT4_LAZYINIT_QUIT; |
| 2837 | |
| 2838 | ext4_li_info = eli; |
| 2839 | |
| 2840 | return 0; |
| 2841 | } |
| 2842 | |
| 2843 | static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, |
| 2844 | ext4_group_t start) |
| 2845 | { |
| 2846 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
| 2847 | struct ext4_li_request *elr; |
| 2848 | unsigned long rnd; |
| 2849 | |
| 2850 | elr = kzalloc(sizeof(*elr), GFP_KERNEL); |
| 2851 | if (!elr) |
| 2852 | return NULL; |
| 2853 | |
| 2854 | elr->lr_super = sb; |
| 2855 | elr->lr_sbi = sbi; |
| 2856 | elr->lr_next_group = start; |
| 2857 | |
| 2858 | /* |
| 2859 | * Randomize first schedule time of the request to |
| 2860 | * spread the inode table initialization requests |
| 2861 | * better. |
| 2862 | */ |
| 2863 | get_random_bytes(&rnd, sizeof(rnd)); |
| 2864 | elr->lr_next_sched = jiffies + (unsigned long)rnd % |
| 2865 | (EXT4_DEF_LI_MAX_START_DELAY * HZ); |
| 2866 | |
| 2867 | return elr; |
| 2868 | } |
| 2869 | |
| 2870 | static int ext4_register_li_request(struct super_block *sb, |
| 2871 | ext4_group_t first_not_zeroed) |
| 2872 | { |
| 2873 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
| 2874 | struct ext4_li_request *elr; |
| 2875 | ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; |
Andrew Morton | 6c5a6cb | 2011-01-10 12:30:17 -0500 | [diff] [blame] | 2876 | int ret = 0; |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2877 | |
Lukas Czerner | 51ce651 | 2011-05-20 13:55:16 -0400 | [diff] [blame] | 2878 | if (sbi->s_li_request != NULL) { |
| 2879 | /* |
| 2880 | * Reset timeout so it can be computed again, because |
| 2881 | * s_li_wait_mult might have changed. |
| 2882 | */ |
| 2883 | sbi->s_li_request->lr_timeout = 0; |
Nicolas Kaiser | beed5ecb | 2010-10-27 22:08:42 -0400 | [diff] [blame] | 2884 | return 0; |
Lukas Czerner | 51ce651 | 2011-05-20 13:55:16 -0400 | [diff] [blame] | 2885 | } |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2886 | |
| 2887 | if (first_not_zeroed == ngroups || |
| 2888 | (sb->s_flags & MS_RDONLY) || |
Tao Ma | 55ff384 | 2011-05-09 10:28:41 -0400 | [diff] [blame] | 2889 | !test_opt(sb, INIT_INODE_TABLE)) |
Nicolas Kaiser | beed5ecb | 2010-10-27 22:08:42 -0400 | [diff] [blame] | 2890 | return 0; |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2891 | |
| 2892 | elr = ext4_li_request_new(sb, first_not_zeroed); |
Nicolas Kaiser | beed5ecb | 2010-10-27 22:08:42 -0400 | [diff] [blame] | 2893 | if (!elr) |
| 2894 | return -ENOMEM; |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2895 | |
| 2896 | mutex_lock(&ext4_li_mtx); |
| 2897 | |
| 2898 | if (NULL == ext4_li_info) { |
| 2899 | ret = ext4_li_info_new(); |
| 2900 | if (ret) |
| 2901 | goto out; |
| 2902 | } |
| 2903 | |
| 2904 | mutex_lock(&ext4_li_info->li_list_mtx); |
| 2905 | list_add(&elr->lr_request, &ext4_li_info->li_request_list); |
| 2906 | mutex_unlock(&ext4_li_info->li_list_mtx); |
| 2907 | |
| 2908 | sbi->s_li_request = elr; |
Tao Ma | 46e4690 | 2011-04-04 16:00:49 -0400 | [diff] [blame] | 2909 | /* |
| 2910 | * set elr to NULL here since it has been inserted to |
| 2911 | * the request_list and the removal and free of it is |
| 2912 | * handled by ext4_clear_request_list from now on. |
| 2913 | */ |
| 2914 | elr = NULL; |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2915 | |
| 2916 | if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { |
| 2917 | ret = ext4_run_lazyinit_thread(); |
| 2918 | if (ret) |
| 2919 | goto out; |
| 2920 | } |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2921 | out: |
Nicolas Kaiser | beed5ecb | 2010-10-27 22:08:42 -0400 | [diff] [blame] | 2922 | mutex_unlock(&ext4_li_mtx); |
| 2923 | if (ret) |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2924 | kfree(elr); |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2925 | return ret; |
| 2926 | } |
| 2927 | |
| 2928 | /* |
| 2929 | * We do not need to lock anything since this is called on |
| 2930 | * module unload. |
| 2931 | */ |
| 2932 | static void ext4_destroy_lazyinit_thread(void) |
| 2933 | { |
| 2934 | /* |
| 2935 | * If thread exited earlier |
| 2936 | * there's nothing to be done. |
| 2937 | */ |
Eric Sandeen | 8f1f745 | 2011-02-03 14:33:15 -0500 | [diff] [blame] | 2938 | if (!ext4_li_info || !ext4_lazyinit_task) |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2939 | return; |
| 2940 | |
Eric Sandeen | 8f1f745 | 2011-02-03 14:33:15 -0500 | [diff] [blame] | 2941 | kthread_stop(ext4_lazyinit_task); |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2942 | } |
| 2943 | |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 2944 | 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] | 2945 | { |
Curt Wohlgemuth | d4c402d | 2010-05-16 12:00:00 -0400 | [diff] [blame] | 2946 | char *orig_data = kstrdup(data, GFP_KERNEL); |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 2947 | struct buffer_head *bh; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2948 | struct ext4_super_block *es = NULL; |
| 2949 | struct ext4_sb_info *sbi; |
| 2950 | ext4_fsblk_t block; |
| 2951 | ext4_fsblk_t sb_block = get_sb_block(&data); |
Andrew Morton | 70bbb3e | 2006-10-11 01:21:20 -0700 | [diff] [blame] | 2952 | ext4_fsblk_t logical_sb_block; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2953 | unsigned long offset = 0; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2954 | unsigned long journal_devnum = 0; |
| 2955 | unsigned long def_mount_opts; |
| 2956 | struct inode *root; |
Theodore Ts'o | 9f6200b | 2008-09-23 09:18:24 -0400 | [diff] [blame] | 2957 | char *cp; |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 2958 | const char *descr; |
Cyrill Gorcunov | dcc7dae | 2010-07-27 11:56:07 -0400 | [diff] [blame] | 2959 | int ret = -ENOMEM; |
Theodore Ts'o | 281b599 | 2011-09-09 18:34:51 -0400 | [diff] [blame] | 2960 | int blocksize, clustersize; |
Theodore Ts'o | 4ec1102 | 2009-01-06 14:53:26 -0500 | [diff] [blame] | 2961 | unsigned int db_count; |
| 2962 | unsigned int i; |
Theodore Ts'o | 281b599 | 2011-09-09 18:34:51 -0400 | [diff] [blame] | 2963 | int needs_recovery, has_huge_files, has_bigalloc; |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 2964 | __u64 blocks_count; |
Peter Zijlstra | 833f407 | 2007-10-16 23:25:45 -0700 | [diff] [blame] | 2965 | int err; |
Theodore Ts'o | b3881f7 | 2009-01-05 22:46:26 -0500 | [diff] [blame] | 2966 | unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 2967 | ext4_group_t first_not_zeroed; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2968 | |
| 2969 | sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); |
| 2970 | if (!sbi) |
Cyrill Gorcunov | dcc7dae | 2010-07-27 11:56:07 -0400 | [diff] [blame] | 2971 | goto out_free_orig; |
Pekka Enberg | 705895b | 2009-02-15 18:07:52 -0500 | [diff] [blame] | 2972 | |
| 2973 | sbi->s_blockgroup_lock = |
| 2974 | kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); |
| 2975 | if (!sbi->s_blockgroup_lock) { |
| 2976 | kfree(sbi); |
Cyrill Gorcunov | dcc7dae | 2010-07-27 11:56:07 -0400 | [diff] [blame] | 2977 | goto out_free_orig; |
Pekka Enberg | 705895b | 2009-02-15 18:07:52 -0500 | [diff] [blame] | 2978 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2979 | sb->s_fs_info = sbi; |
| 2980 | sbi->s_mount_opt = 0; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2981 | sbi->s_resuid = EXT4_DEF_RESUID; |
| 2982 | sbi->s_resgid = EXT4_DEF_RESGID; |
Theodore Ts'o | 240799c | 2008-10-09 23:53:47 -0400 | [diff] [blame] | 2983 | sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; |
Miklos Szeredi | d9c9bef1 | 2007-10-16 23:26:27 -0700 | [diff] [blame] | 2984 | sbi->s_sb_block = sb_block; |
Theodore Ts'o | f613dfc | 2010-07-27 11:56:08 -0400 | [diff] [blame] | 2985 | if (sb->s_bdev->bd_part) |
| 2986 | sbi->s_sectors_written_start = |
| 2987 | part_stat_read(sb->s_bdev->bd_part, sectors[1]); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2988 | |
Theodore Ts'o | 9f6200b | 2008-09-23 09:18:24 -0400 | [diff] [blame] | 2989 | /* Cleanup superblock name */ |
| 2990 | for (cp = sb->s_id; (cp = strchr(cp, '/'));) |
| 2991 | *cp = '!'; |
| 2992 | |
Cyrill Gorcunov | dcc7dae | 2010-07-27 11:56:07 -0400 | [diff] [blame] | 2993 | ret = -EINVAL; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2994 | blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2995 | if (!blocksize) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 2996 | ext4_msg(sb, KERN_ERR, "unable to set blocksize"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2997 | goto out_fail; |
| 2998 | } |
| 2999 | |
| 3000 | /* |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3001 | * The ext4 superblock will not be buffer aligned for other than 1kB |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3002 | * block sizes. We need to calculate the offset from buffer start. |
| 3003 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3004 | if (blocksize != EXT4_MIN_BLOCK_SIZE) { |
Andrew Morton | 70bbb3e | 2006-10-11 01:21:20 -0700 | [diff] [blame] | 3005 | logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; |
| 3006 | offset = do_div(logical_sb_block, blocksize); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3007 | } else { |
Andrew Morton | 70bbb3e | 2006-10-11 01:21:20 -0700 | [diff] [blame] | 3008 | logical_sb_block = sb_block; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3009 | } |
| 3010 | |
Andrew Morton | 70bbb3e | 2006-10-11 01:21:20 -0700 | [diff] [blame] | 3011 | if (!(bh = sb_bread(sb, logical_sb_block))) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3012 | ext4_msg(sb, KERN_ERR, "unable to read superblock"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3013 | goto out_fail; |
| 3014 | } |
| 3015 | /* |
| 3016 | * Note: s_es must be initialized as soon as possible because |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3017 | * some ext4 macro-instructions depend on its value |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3018 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3019 | es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3020 | sbi->s_es = es; |
| 3021 | sb->s_magic = le16_to_cpu(es->s_magic); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3022 | if (sb->s_magic != EXT4_SUPER_MAGIC) |
| 3023 | goto cantfind_ext4; |
Theodore Ts'o | afc32f7 | 2009-02-28 19:39:58 -0500 | [diff] [blame] | 3024 | sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3025 | |
| 3026 | /* Set defaults before we parse the mount options */ |
| 3027 | def_mount_opts = le32_to_cpu(es->s_default_mount_opts); |
Theodore Ts'o | fd8c37e | 2010-12-15 20:26:48 -0500 | [diff] [blame] | 3028 | set_opt(sb, INIT_INODE_TABLE); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3029 | if (def_mount_opts & EXT4_DEFM_DEBUG) |
Theodore Ts'o | fd8c37e | 2010-12-15 20:26:48 -0500 | [diff] [blame] | 3030 | set_opt(sb, DEBUG); |
Theodore Ts'o | 87f2680 | 2012-03-02 00:03:21 -0500 | [diff] [blame] | 3031 | if (def_mount_opts & EXT4_DEFM_BSDGROUPS) |
Theodore Ts'o | fd8c37e | 2010-12-15 20:26:48 -0500 | [diff] [blame] | 3032 | set_opt(sb, GRPID); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3033 | if (def_mount_opts & EXT4_DEFM_UID16) |
Theodore Ts'o | fd8c37e | 2010-12-15 20:26:48 -0500 | [diff] [blame] | 3034 | set_opt(sb, NO_UID32); |
Eric Sandeen | ea66333 | 2011-02-23 17:51:51 -0500 | [diff] [blame] | 3035 | /* xattr user namespace & acls are now defaulted on */ |
Theodore Ts'o | 03010a3 | 2008-10-10 20:02:48 -0400 | [diff] [blame] | 3036 | #ifdef CONFIG_EXT4_FS_XATTR |
Eric Sandeen | ea66333 | 2011-02-23 17:51:51 -0500 | [diff] [blame] | 3037 | set_opt(sb, XATTR_USER); |
Hugh Dickins | 2e7842b | 2007-02-10 01:46:13 -0800 | [diff] [blame] | 3038 | #endif |
Theodore Ts'o | 03010a3 | 2008-10-10 20:02:48 -0400 | [diff] [blame] | 3039 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
Eric Sandeen | ea66333 | 2011-02-23 17:51:51 -0500 | [diff] [blame] | 3040 | set_opt(sb, POSIX_ACL); |
Hugh Dickins | 2e7842b | 2007-02-10 01:46:13 -0800 | [diff] [blame] | 3041 | #endif |
Theodore Ts'o | 6fd7a46 | 2011-02-26 13:53:09 -0500 | [diff] [blame] | 3042 | set_opt(sb, MBLK_IO_SUBMIT); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3043 | if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) |
Theodore Ts'o | fd8c37e | 2010-12-15 20:26:48 -0500 | [diff] [blame] | 3044 | set_opt(sb, JOURNAL_DATA); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3045 | 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] | 3046 | set_opt(sb, ORDERED_DATA); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3047 | 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] | 3048 | set_opt(sb, WRITEBACK_DATA); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3049 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3050 | 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] | 3051 | set_opt(sb, ERRORS_PANIC); |
Aneesh Kumar K.V | bb4f397 | 2008-01-28 23:58:26 -0500 | [diff] [blame] | 3052 | 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] | 3053 | set_opt(sb, ERRORS_CONT); |
Aneesh Kumar K.V | bb4f397 | 2008-01-28 23:58:26 -0500 | [diff] [blame] | 3054 | else |
Theodore Ts'o | fd8c37e | 2010-12-15 20:26:48 -0500 | [diff] [blame] | 3055 | set_opt(sb, ERRORS_RO); |
Theodore Ts'o | 8b67f04 | 2010-08-01 23:14:20 -0400 | [diff] [blame] | 3056 | if (def_mount_opts & EXT4_DEFM_BLOCK_VALIDITY) |
Theodore Ts'o | fd8c37e | 2010-12-15 20:26:48 -0500 | [diff] [blame] | 3057 | set_opt(sb, BLOCK_VALIDITY); |
Theodore Ts'o | 8b67f04 | 2010-08-01 23:14:20 -0400 | [diff] [blame] | 3058 | if (def_mount_opts & EXT4_DEFM_DISCARD) |
Theodore Ts'o | fd8c37e | 2010-12-15 20:26:48 -0500 | [diff] [blame] | 3059 | set_opt(sb, DISCARD); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3060 | |
| 3061 | sbi->s_resuid = le16_to_cpu(es->s_def_resuid); |
| 3062 | sbi->s_resgid = le16_to_cpu(es->s_def_resgid); |
Theodore Ts'o | 3077384 | 2009-01-03 20:27:38 -0500 | [diff] [blame] | 3063 | sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; |
| 3064 | sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; |
| 3065 | sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3066 | |
Theodore Ts'o | 8b67f04 | 2010-08-01 23:14:20 -0400 | [diff] [blame] | 3067 | if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) |
Theodore Ts'o | fd8c37e | 2010-12-15 20:26:48 -0500 | [diff] [blame] | 3068 | set_opt(sb, BARRIER); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3069 | |
Mingming Cao | 1e2462f | 2007-07-18 09:00:55 -0400 | [diff] [blame] | 3070 | /* |
Aneesh Kumar K.V | dd919b9 | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 3071 | * enable delayed allocation by default |
| 3072 | * Use -o nodelalloc to turn it off |
| 3073 | */ |
Theodore Ts'o | 8b67f04 | 2010-08-01 23:14:20 -0400 | [diff] [blame] | 3074 | if (!IS_EXT3_SB(sb) && |
| 3075 | ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) |
Theodore Ts'o | fd8c37e | 2010-12-15 20:26:48 -0500 | [diff] [blame] | 3076 | set_opt(sb, DELALLOC); |
Aneesh Kumar K.V | dd919b9 | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 3077 | |
Lukas Czerner | 51ce651 | 2011-05-20 13:55:16 -0400 | [diff] [blame] | 3078 | /* |
| 3079 | * set default s_li_wait_mult for lazyinit, for the case there is |
| 3080 | * no mount option specified. |
| 3081 | */ |
| 3082 | sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; |
| 3083 | |
Theodore Ts'o | 8b67f04 | 2010-08-01 23:14:20 -0400 | [diff] [blame] | 3084 | if (!parse_options((char *) sbi->s_es->s_mount_opts, sb, |
Eric Sandeen | 661aa52 | 2012-02-20 17:53:04 -0500 | [diff] [blame] | 3085 | &journal_devnum, &journal_ioprio, 0)) { |
Theodore Ts'o | 8b67f04 | 2010-08-01 23:14:20 -0400 | [diff] [blame] | 3086 | ext4_msg(sb, KERN_WARNING, |
| 3087 | "failed to parse options in superblock: %s", |
| 3088 | sbi->s_es->s_mount_opts); |
| 3089 | } |
Theodore Ts'o | 5a916be | 2012-03-04 19:27:31 -0500 | [diff] [blame] | 3090 | sbi->s_def_mount_opt = sbi->s_mount_opt; |
Theodore Ts'o | b3881f7 | 2009-01-05 22:46:26 -0500 | [diff] [blame] | 3091 | if (!parse_options((char *) data, sb, &journal_devnum, |
Eric Sandeen | 661aa52 | 2012-02-20 17:53:04 -0500 | [diff] [blame] | 3092 | &journal_ioprio, 0)) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3093 | goto failed_mount; |
| 3094 | |
Theodore Ts'o | 5688978 | 2011-09-03 18:22:38 -0400 | [diff] [blame] | 3095 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { |
| 3096 | printk_once(KERN_WARNING "EXT4-fs: Warning: mounting " |
| 3097 | "with data=journal disables delayed " |
| 3098 | "allocation and O_DIRECT support!\n"); |
| 3099 | if (test_opt2(sb, EXPLICIT_DELALLOC)) { |
| 3100 | ext4_msg(sb, KERN_ERR, "can't mount with " |
| 3101 | "both data=journal and delalloc"); |
| 3102 | goto failed_mount; |
| 3103 | } |
| 3104 | if (test_opt(sb, DIOREAD_NOLOCK)) { |
| 3105 | ext4_msg(sb, KERN_ERR, "can't mount with " |
| 3106 | "both data=journal and delalloc"); |
| 3107 | goto failed_mount; |
| 3108 | } |
| 3109 | if (test_opt(sb, DELALLOC)) |
| 3110 | clear_opt(sb, DELALLOC); |
| 3111 | } |
| 3112 | |
| 3113 | blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); |
| 3114 | if (test_opt(sb, DIOREAD_NOLOCK)) { |
| 3115 | if (blocksize < PAGE_SIZE) { |
| 3116 | ext4_msg(sb, KERN_ERR, "can't mount with " |
| 3117 | "dioread_nolock if block size != PAGE_SIZE"); |
| 3118 | goto failed_mount; |
| 3119 | } |
| 3120 | } |
| 3121 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3122 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | |
Dmitry Monakhov | 482a742 | 2010-02-24 11:35:32 -0500 | [diff] [blame] | 3123 | (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3124 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3125 | if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && |
| 3126 | (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || |
| 3127 | EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || |
| 3128 | EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3129 | ext4_msg(sb, KERN_WARNING, |
| 3130 | "feature flags set on rev 0 fs, " |
| 3131 | "running e2fsck is recommended"); |
Theodore Tso | 469108f | 2008-02-10 01:11:44 -0500 | [diff] [blame] | 3132 | |
Theodore Ts'o | 2035e77 | 2011-04-18 17:29:14 -0400 | [diff] [blame] | 3133 | if (IS_EXT2_SB(sb)) { |
| 3134 | if (ext2_feature_set_ok(sb)) |
| 3135 | ext4_msg(sb, KERN_INFO, "mounting ext2 file system " |
| 3136 | "using the ext4 subsystem"); |
| 3137 | else { |
| 3138 | ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " |
| 3139 | "to feature incompatibilities"); |
| 3140 | goto failed_mount; |
| 3141 | } |
| 3142 | } |
| 3143 | |
| 3144 | if (IS_EXT3_SB(sb)) { |
| 3145 | if (ext3_feature_set_ok(sb)) |
| 3146 | ext4_msg(sb, KERN_INFO, "mounting ext3 file system " |
| 3147 | "using the ext4 subsystem"); |
| 3148 | else { |
| 3149 | ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " |
| 3150 | "to feature incompatibilities"); |
| 3151 | goto failed_mount; |
| 3152 | } |
| 3153 | } |
| 3154 | |
Theodore Tso | 469108f | 2008-02-10 01:11:44 -0500 | [diff] [blame] | 3155 | /* |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3156 | * Check feature flags regardless of the revision level, since we |
| 3157 | * previously didn't change the revision level when setting the flags, |
| 3158 | * so there is a chance incompat flags are set on a rev 0 filesystem. |
| 3159 | */ |
Eric Sandeen | a13fb1a | 2009-08-18 00:20:23 -0400 | [diff] [blame] | 3160 | if (!ext4_feature_set_ok(sb, (sb->s_flags & MS_RDONLY))) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3161 | goto failed_mount; |
Eric Sandeen | a13fb1a | 2009-08-18 00:20:23 -0400 | [diff] [blame] | 3162 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3163 | if (blocksize < EXT4_MIN_BLOCK_SIZE || |
| 3164 | blocksize > EXT4_MAX_BLOCK_SIZE) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3165 | ext4_msg(sb, KERN_ERR, |
| 3166 | "Unsupported filesystem blocksize %d", blocksize); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3167 | goto failed_mount; |
| 3168 | } |
| 3169 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3170 | if (sb->s_blocksize != blocksize) { |
Aneesh Kumar K.V | ce40733 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 3171 | /* Validate the filesystem blocksize */ |
| 3172 | if (!sb_set_blocksize(sb, blocksize)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3173 | ext4_msg(sb, KERN_ERR, "bad block size %d", |
Aneesh Kumar K.V | ce40733 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 3174 | blocksize); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3175 | goto failed_mount; |
| 3176 | } |
| 3177 | |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 3178 | brelse(bh); |
Andrew Morton | 70bbb3e | 2006-10-11 01:21:20 -0700 | [diff] [blame] | 3179 | logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; |
| 3180 | offset = do_div(logical_sb_block, blocksize); |
| 3181 | bh = sb_bread(sb, logical_sb_block); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3182 | if (!bh) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3183 | ext4_msg(sb, KERN_ERR, |
| 3184 | "Can't read superblock on 2nd try"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3185 | goto failed_mount; |
| 3186 | } |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3187 | es = (struct ext4_super_block *)(((char *)bh->b_data) + offset); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3188 | sbi->s_es = es; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3189 | if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3190 | ext4_msg(sb, KERN_ERR, |
| 3191 | "Magic mismatch, very weird!"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3192 | goto failed_mount; |
| 3193 | } |
| 3194 | } |
| 3195 | |
Eric Sandeen | a13fb1a | 2009-08-18 00:20:23 -0400 | [diff] [blame] | 3196 | has_huge_files = EXT4_HAS_RO_COMPAT_FEATURE(sb, |
| 3197 | EXT4_FEATURE_RO_COMPAT_HUGE_FILE); |
Theodore Ts'o | f287a1a | 2008-10-16 22:50:48 -0400 | [diff] [blame] | 3198 | sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, |
| 3199 | has_huge_files); |
| 3200 | 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] | 3201 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3202 | if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { |
| 3203 | sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; |
| 3204 | sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3205 | } else { |
| 3206 | sbi->s_inode_size = le16_to_cpu(es->s_inode_size); |
| 3207 | sbi->s_first_ino = le32_to_cpu(es->s_first_ino); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3208 | if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || |
Vignesh Babu | 1330593 | 2007-07-18 09:11:02 -0400 | [diff] [blame] | 3209 | (!is_power_of_2(sbi->s_inode_size)) || |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3210 | (sbi->s_inode_size > blocksize)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3211 | ext4_msg(sb, KERN_ERR, |
| 3212 | "unsupported inode size: %d", |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 3213 | sbi->s_inode_size); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3214 | goto failed_mount; |
| 3215 | } |
Kalpak Shah | ef7f383 | 2007-07-18 09:15:20 -0400 | [diff] [blame] | 3216 | if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) |
| 3217 | sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3218 | } |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 3219 | |
Alexandre Ratchov | 0d1ee42 | 2006-10-11 01:21:14 -0700 | [diff] [blame] | 3220 | sbi->s_desc_size = le16_to_cpu(es->s_desc_size); |
| 3221 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 3222 | if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || |
Alexandre Ratchov | 0d1ee42 | 2006-10-11 01:21:14 -0700 | [diff] [blame] | 3223 | sbi->s_desc_size > EXT4_MAX_DESC_SIZE || |
vignesh babu | d8ea6cf | 2007-10-16 23:27:14 -0700 | [diff] [blame] | 3224 | !is_power_of_2(sbi->s_desc_size)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3225 | ext4_msg(sb, KERN_ERR, |
| 3226 | "unsupported descriptor size %lu", |
Alexandre Ratchov | 0d1ee42 | 2006-10-11 01:21:14 -0700 | [diff] [blame] | 3227 | sbi->s_desc_size); |
| 3228 | goto failed_mount; |
| 3229 | } |
| 3230 | } else |
| 3231 | sbi->s_desc_size = EXT4_MIN_DESC_SIZE; |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 3232 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3233 | 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] | 3234 | 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] | 3235 | if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3236 | goto cantfind_ext4; |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 3237 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3238 | sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3239 | if (sbi->s_inodes_per_block == 0) |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3240 | goto cantfind_ext4; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3241 | sbi->s_itb_per_group = sbi->s_inodes_per_group / |
| 3242 | sbi->s_inodes_per_block; |
Alexandre Ratchov | 0d1ee42 | 2006-10-11 01:21:14 -0700 | [diff] [blame] | 3243 | sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3244 | sbi->s_sbh = bh; |
| 3245 | sbi->s_mount_state = le16_to_cpu(es->s_state); |
Fengguang Wu | e57aa83 | 2007-10-16 23:26:25 -0700 | [diff] [blame] | 3246 | sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); |
| 3247 | sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 3248 | |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 3249 | for (i = 0; i < 4; i++) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3250 | sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); |
| 3251 | sbi->s_def_hash_version = es->s_def_hash_version; |
Theodore Ts'o | f99b258 | 2008-10-28 13:21:44 -0400 | [diff] [blame] | 3252 | i = le32_to_cpu(es->s_flags); |
| 3253 | if (i & EXT2_FLAGS_UNSIGNED_HASH) |
| 3254 | sbi->s_hash_unsigned = 3; |
| 3255 | else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { |
| 3256 | #ifdef __CHAR_UNSIGNED__ |
| 3257 | es->s_flags |= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); |
| 3258 | sbi->s_hash_unsigned = 3; |
| 3259 | #else |
| 3260 | es->s_flags |= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); |
| 3261 | #endif |
Theodore Ts'o | f99b258 | 2008-10-28 13:21:44 -0400 | [diff] [blame] | 3262 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3263 | |
Theodore Ts'o | 281b599 | 2011-09-09 18:34:51 -0400 | [diff] [blame] | 3264 | /* Handle clustersize */ |
| 3265 | clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size); |
| 3266 | has_bigalloc = EXT4_HAS_RO_COMPAT_FEATURE(sb, |
| 3267 | EXT4_FEATURE_RO_COMPAT_BIGALLOC); |
| 3268 | if (has_bigalloc) { |
| 3269 | if (clustersize < blocksize) { |
| 3270 | ext4_msg(sb, KERN_ERR, |
| 3271 | "cluster size (%d) smaller than " |
| 3272 | "block size (%d)", clustersize, blocksize); |
| 3273 | goto failed_mount; |
| 3274 | } |
| 3275 | sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) - |
| 3276 | le32_to_cpu(es->s_log_block_size); |
| 3277 | sbi->s_clusters_per_group = |
| 3278 | le32_to_cpu(es->s_clusters_per_group); |
| 3279 | if (sbi->s_clusters_per_group > blocksize * 8) { |
| 3280 | ext4_msg(sb, KERN_ERR, |
| 3281 | "#clusters per group too big: %lu", |
| 3282 | sbi->s_clusters_per_group); |
| 3283 | goto failed_mount; |
| 3284 | } |
| 3285 | if (sbi->s_blocks_per_group != |
| 3286 | (sbi->s_clusters_per_group * (clustersize / blocksize))) { |
| 3287 | ext4_msg(sb, KERN_ERR, "blocks per group (%lu) and " |
| 3288 | "clusters per group (%lu) inconsistent", |
| 3289 | sbi->s_blocks_per_group, |
| 3290 | sbi->s_clusters_per_group); |
| 3291 | goto failed_mount; |
| 3292 | } |
| 3293 | } else { |
| 3294 | if (clustersize != blocksize) { |
| 3295 | ext4_warning(sb, "fragment/cluster size (%d) != " |
| 3296 | "block size (%d)", clustersize, |
| 3297 | blocksize); |
| 3298 | clustersize = blocksize; |
| 3299 | } |
| 3300 | if (sbi->s_blocks_per_group > blocksize * 8) { |
| 3301 | ext4_msg(sb, KERN_ERR, |
| 3302 | "#blocks per group too big: %lu", |
| 3303 | sbi->s_blocks_per_group); |
| 3304 | goto failed_mount; |
| 3305 | } |
| 3306 | sbi->s_clusters_per_group = sbi->s_blocks_per_group; |
| 3307 | sbi->s_cluster_bits = 0; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3308 | } |
Theodore Ts'o | 281b599 | 2011-09-09 18:34:51 -0400 | [diff] [blame] | 3309 | sbi->s_cluster_ratio = clustersize / blocksize; |
| 3310 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3311 | if (sbi->s_inodes_per_group > blocksize * 8) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3312 | ext4_msg(sb, KERN_ERR, |
| 3313 | "#inodes per group too big: %lu", |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 3314 | sbi->s_inodes_per_group); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3315 | goto failed_mount; |
| 3316 | } |
| 3317 | |
Eric Sandeen | bf43d84 | 2009-08-17 23:48:51 -0400 | [diff] [blame] | 3318 | /* |
| 3319 | * Test whether we have more sectors than will fit in sector_t, |
| 3320 | * and whether the max offset is addressable by the page cache. |
| 3321 | */ |
Darrick J. Wong | 5a9ae68 | 2010-11-19 09:56:44 -0500 | [diff] [blame] | 3322 | err = generic_check_addressable(sb->s_blocksize_bits, |
Patrick J. LoPresti | 30ca22c | 2010-07-22 15:03:41 -0700 | [diff] [blame] | 3323 | ext4_blocks_count(es)); |
Darrick J. Wong | 5a9ae68 | 2010-11-19 09:56:44 -0500 | [diff] [blame] | 3324 | if (err) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3325 | ext4_msg(sb, KERN_ERR, "filesystem" |
Eric Sandeen | bf43d84 | 2009-08-17 23:48:51 -0400 | [diff] [blame] | 3326 | " too large to mount safely on this system"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3327 | if (sizeof(sector_t) < 8) |
Bartlomiej Zolnierkiewicz | 90c699a | 2009-06-19 08:08:50 +0200 | [diff] [blame] | 3328 | ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); |
Darrick J. Wong | 5a9ae68 | 2010-11-19 09:56:44 -0500 | [diff] [blame] | 3329 | ret = err; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3330 | goto failed_mount; |
| 3331 | } |
| 3332 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3333 | if (EXT4_BLOCKS_PER_GROUP(sb) == 0) |
| 3334 | goto cantfind_ext4; |
Eric Sandeen | e7c9559 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 3335 | |
From: Thiemo Nagel | 0f2ddca | 2009-04-07 14:07:47 -0400 | [diff] [blame] | 3336 | /* check blocks count against device size */ |
| 3337 | blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; |
| 3338 | if (blocks_count && ext4_blocks_count(es) > blocks_count) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3339 | ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " |
| 3340 | "exceeds size of device (%llu blocks)", |
From: Thiemo Nagel | 0f2ddca | 2009-04-07 14:07:47 -0400 | [diff] [blame] | 3341 | ext4_blocks_count(es), blocks_count); |
| 3342 | goto failed_mount; |
| 3343 | } |
| 3344 | |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 3345 | /* |
| 3346 | * It makes no sense for the first data block to be beyond the end |
| 3347 | * of the filesystem. |
| 3348 | */ |
| 3349 | 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] | 3350 | ext4_msg(sb, KERN_WARNING, "bad geometry: first data " |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3351 | "block %u is beyond end of filesystem (%llu)", |
| 3352 | le32_to_cpu(es->s_first_data_block), |
| 3353 | ext4_blocks_count(es)); |
Eric Sandeen | e7c9559 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 3354 | goto failed_mount; |
| 3355 | } |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 3356 | blocks_count = (ext4_blocks_count(es) - |
| 3357 | le32_to_cpu(es->s_first_data_block) + |
| 3358 | EXT4_BLOCKS_PER_GROUP(sb) - 1); |
| 3359 | do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); |
Theodore Ts'o | 4ec1102 | 2009-01-06 14:53:26 -0500 | [diff] [blame] | 3360 | if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3361 | ext4_msg(sb, KERN_WARNING, "groups count too large: %u " |
Theodore Ts'o | 4ec1102 | 2009-01-06 14:53:26 -0500 | [diff] [blame] | 3362 | "(block count %llu, first data block %u, " |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3363 | "blocks per group %lu)", sbi->s_groups_count, |
Theodore Ts'o | 4ec1102 | 2009-01-06 14:53:26 -0500 | [diff] [blame] | 3364 | ext4_blocks_count(es), |
| 3365 | le32_to_cpu(es->s_first_data_block), |
| 3366 | EXT4_BLOCKS_PER_GROUP(sb)); |
| 3367 | goto failed_mount; |
| 3368 | } |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 3369 | sbi->s_groups_count = blocks_count; |
Eric Sandeen | fb0a387 | 2009-09-16 14:45:10 -0400 | [diff] [blame] | 3370 | sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, |
| 3371 | (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3372 | db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / |
| 3373 | EXT4_DESC_PER_BLOCK(sb); |
Theodore Ts'o | f18a5f2 | 2011-08-01 08:45:38 -0400 | [diff] [blame] | 3374 | sbi->s_group_desc = ext4_kvmalloc(db_count * |
| 3375 | sizeof(struct buffer_head *), |
| 3376 | GFP_KERNEL); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3377 | if (sbi->s_group_desc == NULL) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3378 | ext4_msg(sb, KERN_ERR, "not enough memory"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3379 | goto failed_mount; |
| 3380 | } |
| 3381 | |
Theodore Ts'o | 9f6200b | 2008-09-23 09:18:24 -0400 | [diff] [blame] | 3382 | if (ext4_proc_root) |
| 3383 | sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); |
Theodore Ts'o | 240799c | 2008-10-09 23:53:47 -0400 | [diff] [blame] | 3384 | |
Theodore Ts'o | 66acdcf | 2012-03-04 20:21:38 -0500 | [diff] [blame] | 3385 | if (sbi->s_proc) |
| 3386 | proc_create_data("options", S_IRUGO, sbi->s_proc, |
| 3387 | &ext4_seq_options_fops, sb); |
| 3388 | |
Pekka Enberg | 705895b | 2009-02-15 18:07:52 -0500 | [diff] [blame] | 3389 | bgl_lock_init(sbi->s_blockgroup_lock); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3390 | |
| 3391 | for (i = 0; i < db_count; i++) { |
Andrew Morton | 70bbb3e | 2006-10-11 01:21:20 -0700 | [diff] [blame] | 3392 | block = descriptor_loc(sb, logical_sb_block, i); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3393 | sbi->s_group_desc[i] = sb_bread(sb, block); |
| 3394 | if (!sbi->s_group_desc[i]) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3395 | ext4_msg(sb, KERN_ERR, |
| 3396 | "can't read group descriptor %d", i); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3397 | db_count = i; |
| 3398 | goto failed_mount2; |
| 3399 | } |
| 3400 | } |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 3401 | if (!ext4_check_descriptors(sb, &first_not_zeroed)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3402 | ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3403 | goto failed_mount2; |
| 3404 | } |
Jose R. Santos | 772cb7c | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 3405 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) |
| 3406 | if (!ext4_fill_flex_info(sb)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3407 | ext4_msg(sb, KERN_ERR, |
| 3408 | "unable to initialize " |
| 3409 | "flex_bg meta info!"); |
Jose R. Santos | 772cb7c | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 3410 | goto failed_mount2; |
| 3411 | } |
| 3412 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3413 | sbi->s_gdb_count = db_count; |
| 3414 | get_random_bytes(&sbi->s_next_generation, sizeof(u32)); |
| 3415 | spin_lock_init(&sbi->s_next_gen_lock); |
| 3416 | |
Tao Ma | 0449641 | 2011-04-05 19:55:28 -0400 | [diff] [blame] | 3417 | init_timer(&sbi->s_err_report); |
| 3418 | sbi->s_err_report.function = print_daily_error_info; |
| 3419 | sbi->s_err_report.data = (unsigned long) sb; |
| 3420 | |
Theodore Ts'o | 5704265 | 2011-09-09 18:56:51 -0400 | [diff] [blame] | 3421 | err = percpu_counter_init(&sbi->s_freeclusters_counter, |
Theodore Ts'o | 5dee543 | 2011-09-09 19:10:51 -0400 | [diff] [blame] | 3422 | ext4_count_free_clusters(sb)); |
Theodore Ts'o | ce7e010 | 2010-11-03 12:03:21 -0400 | [diff] [blame] | 3423 | if (!err) { |
| 3424 | err = percpu_counter_init(&sbi->s_freeinodes_counter, |
| 3425 | ext4_count_free_inodes(sb)); |
| 3426 | } |
| 3427 | if (!err) { |
| 3428 | err = percpu_counter_init(&sbi->s_dirs_counter, |
| 3429 | ext4_count_dirs(sb)); |
| 3430 | } |
| 3431 | if (!err) { |
Theodore Ts'o | 5704265 | 2011-09-09 18:56:51 -0400 | [diff] [blame] | 3432 | err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0); |
Theodore Ts'o | ce7e010 | 2010-11-03 12:03:21 -0400 | [diff] [blame] | 3433 | } |
| 3434 | if (err) { |
| 3435 | ext4_msg(sb, KERN_ERR, "insufficient memory"); |
| 3436 | goto failed_mount3; |
| 3437 | } |
| 3438 | |
Alex Tomas | c9de560 | 2008-01-29 00:19:52 -0500 | [diff] [blame] | 3439 | sbi->s_stripe = ext4_get_stripe_size(sbi); |
Theodore Ts'o | 55138e0 | 2009-09-29 13:31:31 -0400 | [diff] [blame] | 3440 | sbi->s_max_writeback_mb_bump = 128; |
Alex Tomas | c9de560 | 2008-01-29 00:19:52 -0500 | [diff] [blame] | 3441 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3442 | /* |
| 3443 | * set up enough so that it can read an inode |
| 3444 | */ |
Theodore Ts'o | 9ca9238 | 2009-05-01 12:52:25 -0400 | [diff] [blame] | 3445 | if (!test_opt(sb, NOLOAD) && |
| 3446 | EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) |
| 3447 | sb->s_op = &ext4_sops; |
| 3448 | else |
| 3449 | sb->s_op = &ext4_nojournal_sops; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3450 | sb->s_export_op = &ext4_export_ops; |
| 3451 | sb->s_xattr = ext4_xattr_handlers; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3452 | #ifdef CONFIG_QUOTA |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3453 | sb->s_qcop = &ext4_qctl_operations; |
| 3454 | sb->dq_op = &ext4_quota_operations; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3455 | #endif |
Aneesh Kumar K.V | f2fa2ff | 2011-01-29 18:43:40 +0530 | [diff] [blame] | 3456 | memcpy(sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); |
| 3457 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3458 | INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ |
Theodore Ts'o | 3b9d4ed | 2009-04-25 22:54:04 -0400 | [diff] [blame] | 3459 | mutex_init(&sbi->s_orphan_lock); |
Yongqiang Yang | 8f82f84 | 2011-07-26 21:35:44 -0400 | [diff] [blame] | 3460 | sbi->s_resize_flags = 0; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3461 | |
| 3462 | sb->s_root = NULL; |
| 3463 | |
| 3464 | needs_recovery = (es->s_last_orphan != 0 || |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3465 | EXT4_HAS_INCOMPAT_FEATURE(sb, |
| 3466 | EXT4_FEATURE_INCOMPAT_RECOVER)); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3467 | |
Johann Lombardi | c5e06d1 | 2011-05-24 18:31:25 -0400 | [diff] [blame] | 3468 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_MMP) && |
| 3469 | !(sb->s_flags & MS_RDONLY)) |
| 3470 | if (ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block))) |
| 3471 | goto failed_mount3; |
| 3472 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3473 | /* |
| 3474 | * The first inode we look at is the journal inode. Don't try |
| 3475 | * root first: it may be modified in the journal! |
| 3476 | */ |
| 3477 | if (!test_opt(sb, NOLOAD) && |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3478 | EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { |
| 3479 | if (ext4_load_journal(sb, es, journal_devnum)) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3480 | goto failed_mount3; |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 3481 | } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && |
| 3482 | EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3483 | ext4_msg(sb, KERN_ERR, "required journal recovery " |
| 3484 | "suppressed and not mounted read-only"); |
Jiaying Zhang | 744692d | 2010-03-04 16:14:02 -0500 | [diff] [blame] | 3485 | goto failed_mount_wq; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3486 | } else { |
Theodore Ts'o | fd8c37e | 2010-12-15 20:26:48 -0500 | [diff] [blame] | 3487 | clear_opt(sb, DATA_FLAGS); |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 3488 | sbi->s_journal = NULL; |
| 3489 | needs_recovery = 0; |
| 3490 | goto no_journal; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3491 | } |
| 3492 | |
Jose R. Santos | eb40a09 | 2007-07-18 08:37:25 -0400 | [diff] [blame] | 3493 | if (ext4_blocks_count(es) > 0xffffffffULL && |
| 3494 | !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, |
| 3495 | JBD2_FEATURE_INCOMPAT_64BIT)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3496 | ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); |
Jiaying Zhang | 744692d | 2010-03-04 16:14:02 -0500 | [diff] [blame] | 3497 | goto failed_mount_wq; |
Jose R. Santos | eb40a09 | 2007-07-18 08:37:25 -0400 | [diff] [blame] | 3498 | } |
| 3499 | |
Linus Torvalds | d4da6c9 | 2009-11-02 10:15:27 -0800 | [diff] [blame] | 3500 | if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { |
| 3501 | jbd2_journal_set_features(sbi->s_journal, |
| 3502 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, |
Girish Shilamkar | 818d276 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 3503 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); |
Linus Torvalds | d4da6c9 | 2009-11-02 10:15:27 -0800 | [diff] [blame] | 3504 | } else if (test_opt(sb, JOURNAL_CHECKSUM)) { |
| 3505 | jbd2_journal_set_features(sbi->s_journal, |
| 3506 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, 0); |
Girish Shilamkar | 818d276 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 3507 | jbd2_journal_clear_features(sbi->s_journal, 0, 0, |
| 3508 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); |
Linus Torvalds | d4da6c9 | 2009-11-02 10:15:27 -0800 | [diff] [blame] | 3509 | } else { |
| 3510 | jbd2_journal_clear_features(sbi->s_journal, |
| 3511 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, |
| 3512 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); |
| 3513 | } |
Girish Shilamkar | 818d276 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 3514 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3515 | /* We have now updated the journal if required, so we can |
| 3516 | * validate the data journaling mode. */ |
| 3517 | switch (test_opt(sb, DATA_FLAGS)) { |
| 3518 | case 0: |
| 3519 | /* No mode set, assume a default based on the journal |
Andrew Morton | 63f5793 | 2006-10-11 01:21:24 -0700 | [diff] [blame] | 3520 | * capabilities: ORDERED_DATA if the journal can |
| 3521 | * cope, else JOURNAL_DATA |
| 3522 | */ |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 3523 | if (jbd2_journal_check_available_features |
| 3524 | (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) |
Theodore Ts'o | fd8c37e | 2010-12-15 20:26:48 -0500 | [diff] [blame] | 3525 | set_opt(sb, ORDERED_DATA); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3526 | else |
Theodore Ts'o | fd8c37e | 2010-12-15 20:26:48 -0500 | [diff] [blame] | 3527 | set_opt(sb, JOURNAL_DATA); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3528 | break; |
| 3529 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3530 | case EXT4_MOUNT_ORDERED_DATA: |
| 3531 | case EXT4_MOUNT_WRITEBACK_DATA: |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 3532 | if (!jbd2_journal_check_available_features |
| 3533 | (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3534 | ext4_msg(sb, KERN_ERR, "Journal does not support " |
| 3535 | "requested data journaling mode"); |
Jiaying Zhang | 744692d | 2010-03-04 16:14:02 -0500 | [diff] [blame] | 3536 | goto failed_mount_wq; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3537 | } |
| 3538 | default: |
| 3539 | break; |
| 3540 | } |
Theodore Ts'o | b3881f7 | 2009-01-05 22:46:26 -0500 | [diff] [blame] | 3541 | set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3542 | |
Bobi Jam | 18aadd4 | 2012-02-20 17:53:02 -0500 | [diff] [blame] | 3543 | sbi->s_journal->j_commit_callback = ext4_journal_commit_callback; |
| 3544 | |
Theodore Ts'o | ce7e010 | 2010-11-03 12:03:21 -0400 | [diff] [blame] | 3545 | /* |
| 3546 | * The journal may have updated the bg summary counts, so we |
| 3547 | * need to update the global counters. |
| 3548 | */ |
Theodore Ts'o | 5704265 | 2011-09-09 18:56:51 -0400 | [diff] [blame] | 3549 | percpu_counter_set(&sbi->s_freeclusters_counter, |
Theodore Ts'o | 5dee543 | 2011-09-09 19:10:51 -0400 | [diff] [blame] | 3550 | ext4_count_free_clusters(sb)); |
Theodore Ts'o | ce7e010 | 2010-11-03 12:03:21 -0400 | [diff] [blame] | 3551 | percpu_counter_set(&sbi->s_freeinodes_counter, |
| 3552 | ext4_count_free_inodes(sb)); |
| 3553 | percpu_counter_set(&sbi->s_dirs_counter, |
| 3554 | ext4_count_dirs(sb)); |
Theodore Ts'o | 5704265 | 2011-09-09 18:56:51 -0400 | [diff] [blame] | 3555 | percpu_counter_set(&sbi->s_dirtyclusters_counter, 0); |
Christoph Hellwig | 206f7ab | 2010-06-14 14:42:49 -0400 | [diff] [blame] | 3556 | |
Theodore Ts'o | ce7e010 | 2010-11-03 12:03:21 -0400 | [diff] [blame] | 3557 | no_journal: |
Tejun Heo | fd89d5f | 2011-02-01 11:42:42 +0100 | [diff] [blame] | 3558 | /* |
| 3559 | * The maximum number of concurrent works can be high and |
| 3560 | * concurrency isn't really necessary. Limit it to 1. |
| 3561 | */ |
| 3562 | EXT4_SB(sb)->dio_unwritten_wq = |
Linus Torvalds | ae005cb | 2011-03-25 09:57:40 -0700 | [diff] [blame] | 3563 | alloc_workqueue("ext4-dio-unwritten", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); |
Mingming Cao | 4c0425f | 2009-09-28 15:48:41 -0400 | [diff] [blame] | 3564 | if (!EXT4_SB(sb)->dio_unwritten_wq) { |
| 3565 | printk(KERN_ERR "EXT4-fs: failed to create DIO workqueue\n"); |
| 3566 | goto failed_mount_wq; |
| 3567 | } |
| 3568 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3569 | /* |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 3570 | * The jbd2_journal_load will have done any necessary log recovery, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3571 | * so we can safely mount the rest of the filesystem now. |
| 3572 | */ |
| 3573 | |
David Howells | 1d1fe1e | 2008-02-07 00:15:37 -0800 | [diff] [blame] | 3574 | root = ext4_iget(sb, EXT4_ROOT_INO); |
| 3575 | if (IS_ERR(root)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3576 | ext4_msg(sb, KERN_ERR, "get root inode failed"); |
David Howells | 1d1fe1e | 2008-02-07 00:15:37 -0800 | [diff] [blame] | 3577 | ret = PTR_ERR(root); |
Manish Katiyar | 32a9bb5 | 2011-02-27 20:42:06 -0500 | [diff] [blame] | 3578 | root = NULL; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3579 | goto failed_mount4; |
| 3580 | } |
| 3581 | if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3582 | ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); |
Al Viro | 94bf608 | 2012-01-09 15:53:24 -0500 | [diff] [blame] | 3583 | iput(root); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3584 | goto failed_mount4; |
| 3585 | } |
Al Viro | 48fde70 | 2012-01-08 22:15:13 -0500 | [diff] [blame] | 3586 | sb->s_root = d_make_root(root); |
David Howells | 1d1fe1e | 2008-02-07 00:15:37 -0800 | [diff] [blame] | 3587 | if (!sb->s_root) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3588 | ext4_msg(sb, KERN_ERR, "get root dentry failed"); |
David Howells | 1d1fe1e | 2008-02-07 00:15:37 -0800 | [diff] [blame] | 3589 | ret = -ENOMEM; |
| 3590 | goto failed_mount4; |
| 3591 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3592 | |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 3593 | ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY); |
Kalpak Shah | ef7f383 | 2007-07-18 09:15:20 -0400 | [diff] [blame] | 3594 | |
| 3595 | /* determine the minimum size of new large inodes, if present */ |
| 3596 | if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { |
| 3597 | sbi->s_want_extra_isize = sizeof(struct ext4_inode) - |
| 3598 | EXT4_GOOD_OLD_INODE_SIZE; |
| 3599 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, |
| 3600 | EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { |
| 3601 | if (sbi->s_want_extra_isize < |
| 3602 | le16_to_cpu(es->s_want_extra_isize)) |
| 3603 | sbi->s_want_extra_isize = |
| 3604 | le16_to_cpu(es->s_want_extra_isize); |
| 3605 | if (sbi->s_want_extra_isize < |
| 3606 | le16_to_cpu(es->s_min_extra_isize)) |
| 3607 | sbi->s_want_extra_isize = |
| 3608 | le16_to_cpu(es->s_min_extra_isize); |
| 3609 | } |
| 3610 | } |
| 3611 | /* Check if enough inode space is available */ |
| 3612 | if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > |
| 3613 | sbi->s_inode_size) { |
| 3614 | sbi->s_want_extra_isize = sizeof(struct ext4_inode) - |
| 3615 | EXT4_GOOD_OLD_INODE_SIZE; |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3616 | ext4_msg(sb, KERN_INFO, "required extra inode space not" |
| 3617 | "available"); |
Kalpak Shah | ef7f383 | 2007-07-18 09:15:20 -0400 | [diff] [blame] | 3618 | } |
| 3619 | |
Theodore Ts'o | 6fd058f | 2009-05-17 15:38:01 -0400 | [diff] [blame] | 3620 | err = ext4_setup_system_zone(sb); |
| 3621 | if (err) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3622 | ext4_msg(sb, KERN_ERR, "failed to initialize system " |
Curt Wohlgemuth | fbe845d | 2010-05-16 13:00:00 -0400 | [diff] [blame] | 3623 | "zone (%d)", err); |
Al Viro | 94bf608 | 2012-01-09 15:53:24 -0500 | [diff] [blame] | 3624 | goto failed_mount4a; |
Theodore Ts'o | 6fd058f | 2009-05-17 15:38:01 -0400 | [diff] [blame] | 3625 | } |
| 3626 | |
Aneesh Kumar K.V | c2774d8 | 2008-10-10 20:07:20 -0400 | [diff] [blame] | 3627 | ext4_ext_init(sb); |
| 3628 | err = ext4_mb_init(sb, needs_recovery); |
| 3629 | if (err) { |
Uwe Kleine-König | 421f91d | 2010-06-11 12:17:00 +0200 | [diff] [blame] | 3630 | ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3631 | err); |
Tao Ma | dcf2d80 | 2011-10-06 12:10:11 -0400 | [diff] [blame] | 3632 | goto failed_mount5; |
Aneesh Kumar K.V | c2774d8 | 2008-10-10 20:07:20 -0400 | [diff] [blame] | 3633 | } |
| 3634 | |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 3635 | err = ext4_register_li_request(sb, first_not_zeroed); |
| 3636 | if (err) |
Tao Ma | dcf2d80 | 2011-10-06 12:10:11 -0400 | [diff] [blame] | 3637 | goto failed_mount6; |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 3638 | |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 3639 | sbi->s_kobj.kset = ext4_kset; |
| 3640 | init_completion(&sbi->s_kobj_unregister); |
| 3641 | err = kobject_init_and_add(&sbi->s_kobj, &ext4_ktype, NULL, |
| 3642 | "%s", sb->s_id); |
Tao Ma | dcf2d80 | 2011-10-06 12:10:11 -0400 | [diff] [blame] | 3643 | if (err) |
| 3644 | goto failed_mount7; |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 3645 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3646 | EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; |
| 3647 | ext4_orphan_cleanup(sb, es); |
| 3648 | EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 3649 | if (needs_recovery) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3650 | ext4_msg(sb, KERN_INFO, "recovery complete"); |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 3651 | ext4_mark_recovery_complete(sb, es); |
| 3652 | } |
| 3653 | if (EXT4_SB(sb)->s_journal) { |
| 3654 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) |
| 3655 | descr = " journalled data mode"; |
| 3656 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) |
| 3657 | descr = " ordered data mode"; |
| 3658 | else |
| 3659 | descr = " writeback data mode"; |
| 3660 | } else |
| 3661 | descr = "out journal"; |
| 3662 | |
Curt Wohlgemuth | d4c402d | 2010-05-16 12:00:00 -0400 | [diff] [blame] | 3663 | ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " |
Theodore Ts'o | 8b67f04 | 2010-08-01 23:14:20 -0400 | [diff] [blame] | 3664 | "Opts: %s%s%s", descr, sbi->s_es->s_mount_opts, |
| 3665 | *sbi->s_es->s_mount_opts ? "; " : "", orig_data); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3666 | |
Theodore Ts'o | 66e61a9 | 2010-07-27 11:56:04 -0400 | [diff] [blame] | 3667 | if (es->s_error_count) |
| 3668 | mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3669 | |
Curt Wohlgemuth | d4c402d | 2010-05-16 12:00:00 -0400 | [diff] [blame] | 3670 | kfree(orig_data); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3671 | return 0; |
| 3672 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3673 | cantfind_ext4: |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3674 | if (!silent) |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3675 | ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3676 | goto failed_mount; |
| 3677 | |
Tao Ma | dcf2d80 | 2011-10-06 12:10:11 -0400 | [diff] [blame] | 3678 | failed_mount7: |
| 3679 | ext4_unregister_li_request(sb); |
| 3680 | failed_mount6: |
Tao Ma | dcf2d80 | 2011-10-06 12:10:11 -0400 | [diff] [blame] | 3681 | ext4_mb_release(sb); |
Al Viro | 94bf608 | 2012-01-09 15:53:24 -0500 | [diff] [blame] | 3682 | failed_mount5: |
| 3683 | ext4_ext_release(sb); |
Tao Ma | dcf2d80 | 2011-10-06 12:10:11 -0400 | [diff] [blame] | 3684 | ext4_release_system_zone(sb); |
Al Viro | 94bf608 | 2012-01-09 15:53:24 -0500 | [diff] [blame] | 3685 | failed_mount4a: |
| 3686 | dput(sb->s_root); |
Manish Katiyar | 32a9bb5 | 2011-02-27 20:42:06 -0500 | [diff] [blame] | 3687 | sb->s_root = NULL; |
Al Viro | 94bf608 | 2012-01-09 15:53:24 -0500 | [diff] [blame] | 3688 | failed_mount4: |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3689 | ext4_msg(sb, KERN_ERR, "mount failed"); |
Mingming Cao | 4c0425f | 2009-09-28 15:48:41 -0400 | [diff] [blame] | 3690 | destroy_workqueue(EXT4_SB(sb)->dio_unwritten_wq); |
| 3691 | failed_mount_wq: |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 3692 | if (sbi->s_journal) { |
| 3693 | jbd2_journal_destroy(sbi->s_journal); |
| 3694 | sbi->s_journal = NULL; |
| 3695 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3696 | failed_mount3: |
Tao Ma | 0449641 | 2011-04-05 19:55:28 -0400 | [diff] [blame] | 3697 | del_timer(&sbi->s_err_report); |
Theodore Ts'o | 9933fc0 | 2011-08-01 08:45:02 -0400 | [diff] [blame] | 3698 | if (sbi->s_flex_groups) |
| 3699 | ext4_kvfree(sbi->s_flex_groups); |
Theodore Ts'o | 5704265 | 2011-09-09 18:56:51 -0400 | [diff] [blame] | 3700 | percpu_counter_destroy(&sbi->s_freeclusters_counter); |
Theodore Ts'o | ce7e010 | 2010-11-03 12:03:21 -0400 | [diff] [blame] | 3701 | percpu_counter_destroy(&sbi->s_freeinodes_counter); |
| 3702 | percpu_counter_destroy(&sbi->s_dirs_counter); |
Theodore Ts'o | 5704265 | 2011-09-09 18:56:51 -0400 | [diff] [blame] | 3703 | percpu_counter_destroy(&sbi->s_dirtyclusters_counter); |
Johann Lombardi | c5e06d1 | 2011-05-24 18:31:25 -0400 | [diff] [blame] | 3704 | if (sbi->s_mmp_tsk) |
| 3705 | kthread_stop(sbi->s_mmp_tsk); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3706 | failed_mount2: |
| 3707 | for (i = 0; i < db_count; i++) |
| 3708 | brelse(sbi->s_group_desc[i]); |
Theodore Ts'o | f18a5f2 | 2011-08-01 08:45:38 -0400 | [diff] [blame] | 3709 | ext4_kvfree(sbi->s_group_desc); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3710 | failed_mount: |
Theodore Ts'o | 240799c | 2008-10-09 23:53:47 -0400 | [diff] [blame] | 3711 | if (sbi->s_proc) { |
Theodore Ts'o | 66acdcf | 2012-03-04 20:21:38 -0500 | [diff] [blame] | 3712 | remove_proc_entry("options", sbi->s_proc); |
Theodore Ts'o | 9f6200b | 2008-09-23 09:18:24 -0400 | [diff] [blame] | 3713 | remove_proc_entry(sb->s_id, ext4_proc_root); |
Theodore Ts'o | 240799c | 2008-10-09 23:53:47 -0400 | [diff] [blame] | 3714 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3715 | #ifdef CONFIG_QUOTA |
| 3716 | for (i = 0; i < MAXQUOTAS; i++) |
| 3717 | kfree(sbi->s_qf_names[i]); |
| 3718 | #endif |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3719 | ext4_blkdev_remove(sbi); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3720 | brelse(bh); |
| 3721 | out_fail: |
| 3722 | sb->s_fs_info = NULL; |
Manish Katiyar | f683016 | 2009-05-17 23:52:44 -0400 | [diff] [blame] | 3723 | kfree(sbi->s_blockgroup_lock); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3724 | kfree(sbi); |
Cyrill Gorcunov | dcc7dae | 2010-07-27 11:56:07 -0400 | [diff] [blame] | 3725 | out_free_orig: |
Curt Wohlgemuth | d4c402d | 2010-05-16 12:00:00 -0400 | [diff] [blame] | 3726 | kfree(orig_data); |
David Howells | 1d1fe1e | 2008-02-07 00:15:37 -0800 | [diff] [blame] | 3727 | return ret; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3728 | } |
| 3729 | |
| 3730 | /* |
| 3731 | * Setup any per-fs journal parameters now. We'll do this both on |
| 3732 | * initial mount, once the journal has been initialised but before we've |
| 3733 | * done any recovery; and again on any subsequent remount. |
| 3734 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3735 | 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] | 3736 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3737 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3738 | |
Theodore Ts'o | 3077384 | 2009-01-03 20:27:38 -0500 | [diff] [blame] | 3739 | journal->j_commit_interval = sbi->s_commit_interval; |
| 3740 | journal->j_min_batch_time = sbi->s_min_batch_time; |
| 3741 | journal->j_max_batch_time = sbi->s_max_batch_time; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3742 | |
Theodore Ts'o | a931da6 | 2010-08-03 21:35:12 -0400 | [diff] [blame] | 3743 | write_lock(&journal->j_state_lock); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3744 | if (test_opt(sb, BARRIER)) |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 3745 | journal->j_flags |= JBD2_BARRIER; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3746 | else |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 3747 | journal->j_flags &= ~JBD2_BARRIER; |
Hidehiro Kawai | 5bf5683 | 2008-10-10 22:12:43 -0400 | [diff] [blame] | 3748 | if (test_opt(sb, DATA_ERR_ABORT)) |
| 3749 | journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; |
| 3750 | else |
| 3751 | journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; |
Theodore Ts'o | a931da6 | 2010-08-03 21:35:12 -0400 | [diff] [blame] | 3752 | write_unlock(&journal->j_state_lock); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3753 | } |
| 3754 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3755 | static journal_t *ext4_get_journal(struct super_block *sb, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3756 | unsigned int journal_inum) |
| 3757 | { |
| 3758 | struct inode *journal_inode; |
| 3759 | journal_t *journal; |
| 3760 | |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 3761 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
| 3762 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3763 | /* First, test for the existence of a valid inode on disk. Bad |
| 3764 | * things happen if we iget() an unused inode, as the subsequent |
| 3765 | * iput() will try to delete it. */ |
| 3766 | |
David Howells | 1d1fe1e | 2008-02-07 00:15:37 -0800 | [diff] [blame] | 3767 | journal_inode = ext4_iget(sb, journal_inum); |
| 3768 | if (IS_ERR(journal_inode)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3769 | ext4_msg(sb, KERN_ERR, "no journal found"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3770 | return NULL; |
| 3771 | } |
| 3772 | if (!journal_inode->i_nlink) { |
| 3773 | make_bad_inode(journal_inode); |
| 3774 | iput(journal_inode); |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3775 | ext4_msg(sb, KERN_ERR, "journal inode is deleted"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3776 | return NULL; |
| 3777 | } |
| 3778 | |
Theodore Ts'o | e5f8eab8 | 2008-09-08 22:25:04 -0400 | [diff] [blame] | 3779 | jbd_debug(2, "Journal inode found at %p: %lld bytes\n", |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3780 | journal_inode, journal_inode->i_size); |
David Howells | 1d1fe1e | 2008-02-07 00:15:37 -0800 | [diff] [blame] | 3781 | if (!S_ISREG(journal_inode->i_mode)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3782 | ext4_msg(sb, KERN_ERR, "invalid journal inode"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3783 | iput(journal_inode); |
| 3784 | return NULL; |
| 3785 | } |
| 3786 | |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 3787 | journal = jbd2_journal_init_inode(journal_inode); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3788 | if (!journal) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3789 | ext4_msg(sb, KERN_ERR, "Could not load journal inode"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3790 | iput(journal_inode); |
| 3791 | return NULL; |
| 3792 | } |
| 3793 | journal->j_private = sb; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3794 | ext4_init_journal_params(sb, journal); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3795 | return journal; |
| 3796 | } |
| 3797 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3798 | static journal_t *ext4_get_dev_journal(struct super_block *sb, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3799 | dev_t j_dev) |
| 3800 | { |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 3801 | struct buffer_head *bh; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3802 | journal_t *journal; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3803 | ext4_fsblk_t start; |
| 3804 | ext4_fsblk_t len; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3805 | int hblock, blocksize; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3806 | ext4_fsblk_t sb_block; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3807 | unsigned long offset; |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 3808 | struct ext4_super_block *es; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3809 | struct block_device *bdev; |
| 3810 | |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 3811 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
| 3812 | |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3813 | bdev = ext4_blkdev_get(j_dev, sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3814 | if (bdev == NULL) |
| 3815 | return NULL; |
| 3816 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3817 | blocksize = sb->s_blocksize; |
Martin K. Petersen | e1defc4 | 2009-05-22 17:17:49 -0400 | [diff] [blame] | 3818 | hblock = bdev_logical_block_size(bdev); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3819 | if (blocksize < hblock) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3820 | ext4_msg(sb, KERN_ERR, |
| 3821 | "blocksize too small for journal device"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3822 | goto out_bdev; |
| 3823 | } |
| 3824 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3825 | sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; |
| 3826 | offset = EXT4_MIN_BLOCK_SIZE % blocksize; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3827 | set_blocksize(bdev, blocksize); |
| 3828 | if (!(bh = __bread(bdev, sb_block, blocksize))) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3829 | ext4_msg(sb, KERN_ERR, "couldn't read superblock of " |
| 3830 | "external journal"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3831 | goto out_bdev; |
| 3832 | } |
| 3833 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3834 | es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); |
| 3835 | if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3836 | !(le32_to_cpu(es->s_feature_incompat) & |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3837 | EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3838 | ext4_msg(sb, KERN_ERR, "external journal has " |
| 3839 | "bad superblock"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3840 | brelse(bh); |
| 3841 | goto out_bdev; |
| 3842 | } |
| 3843 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3844 | 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] | 3845 | ext4_msg(sb, KERN_ERR, "journal UUID does not match"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3846 | brelse(bh); |
| 3847 | goto out_bdev; |
| 3848 | } |
| 3849 | |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 3850 | len = ext4_blocks_count(es); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3851 | start = sb_block + 1; |
| 3852 | brelse(bh); /* we're done with the superblock */ |
| 3853 | |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 3854 | journal = jbd2_journal_init_dev(bdev, sb->s_bdev, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3855 | start, len, blocksize); |
| 3856 | if (!journal) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3857 | ext4_msg(sb, KERN_ERR, "failed to create device journal"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3858 | goto out_bdev; |
| 3859 | } |
| 3860 | journal->j_private = sb; |
| 3861 | ll_rw_block(READ, 1, &journal->j_sb_buffer); |
| 3862 | wait_on_buffer(journal->j_sb_buffer); |
| 3863 | if (!buffer_uptodate(journal->j_sb_buffer)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3864 | ext4_msg(sb, KERN_ERR, "I/O error on journal device"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3865 | goto out_journal; |
| 3866 | } |
| 3867 | if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3868 | ext4_msg(sb, KERN_ERR, "External journal has more than one " |
| 3869 | "user (unsupported) - %d", |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3870 | be32_to_cpu(journal->j_superblock->s_nr_users)); |
| 3871 | goto out_journal; |
| 3872 | } |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3873 | EXT4_SB(sb)->journal_bdev = bdev; |
| 3874 | ext4_init_journal_params(sb, journal); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3875 | return journal; |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 3876 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3877 | out_journal: |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 3878 | jbd2_journal_destroy(journal); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3879 | out_bdev: |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3880 | ext4_blkdev_put(bdev); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3881 | return NULL; |
| 3882 | } |
| 3883 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3884 | static int ext4_load_journal(struct super_block *sb, |
| 3885 | struct ext4_super_block *es, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3886 | unsigned long journal_devnum) |
| 3887 | { |
| 3888 | journal_t *journal; |
| 3889 | unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); |
| 3890 | dev_t journal_dev; |
| 3891 | int err = 0; |
| 3892 | int really_read_only; |
| 3893 | |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 3894 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
| 3895 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3896 | if (journal_devnum && |
| 3897 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3898 | ext4_msg(sb, KERN_INFO, "external journal device major/minor " |
| 3899 | "numbers have changed"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3900 | journal_dev = new_decode_dev(journal_devnum); |
| 3901 | } else |
| 3902 | journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); |
| 3903 | |
| 3904 | really_read_only = bdev_read_only(sb->s_bdev); |
| 3905 | |
| 3906 | /* |
| 3907 | * Are we loading a blank journal or performing recovery after a |
| 3908 | * crash? For recovery, we need to check in advance whether we |
| 3909 | * can get read-write access to the device. |
| 3910 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3911 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3912 | if (sb->s_flags & MS_RDONLY) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3913 | ext4_msg(sb, KERN_INFO, "INFO: recovery " |
| 3914 | "required on readonly filesystem"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3915 | if (really_read_only) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3916 | ext4_msg(sb, KERN_ERR, "write access " |
| 3917 | "unavailable, cannot proceed"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3918 | return -EROFS; |
| 3919 | } |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3920 | ext4_msg(sb, KERN_INFO, "write access will " |
| 3921 | "be enabled during recovery"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3922 | } |
| 3923 | } |
| 3924 | |
| 3925 | if (journal_inum && journal_dev) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3926 | ext4_msg(sb, KERN_ERR, "filesystem has both journal " |
| 3927 | "and inode journals!"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3928 | return -EINVAL; |
| 3929 | } |
| 3930 | |
| 3931 | if (journal_inum) { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3932 | if (!(journal = ext4_get_journal(sb, journal_inum))) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3933 | return -EINVAL; |
| 3934 | } else { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3935 | if (!(journal = ext4_get_dev_journal(sb, journal_dev))) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3936 | return -EINVAL; |
| 3937 | } |
| 3938 | |
Theodore Ts'o | 90576c0 | 2009-09-29 15:51:30 -0400 | [diff] [blame] | 3939 | if (!(journal->j_flags & JBD2_BARRIER)) |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3940 | ext4_msg(sb, KERN_INFO, "barriers disabled"); |
Theodore Ts'o | 4776004f | 2008-09-08 23:00:52 -0400 | [diff] [blame] | 3941 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3942 | if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 3943 | err = jbd2_journal_wipe(journal, !really_read_only); |
Theodore Ts'o | 1c13d5c | 2010-07-27 11:56:03 -0400 | [diff] [blame] | 3944 | if (!err) { |
| 3945 | char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); |
| 3946 | if (save) |
| 3947 | memcpy(save, ((char *) es) + |
| 3948 | EXT4_S_ERR_START, EXT4_S_ERR_LEN); |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 3949 | err = jbd2_journal_load(journal); |
Theodore Ts'o | 1c13d5c | 2010-07-27 11:56:03 -0400 | [diff] [blame] | 3950 | if (save) |
| 3951 | memcpy(((char *) es) + EXT4_S_ERR_START, |
| 3952 | save, EXT4_S_ERR_LEN); |
| 3953 | kfree(save); |
| 3954 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3955 | |
| 3956 | if (err) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3957 | ext4_msg(sb, KERN_ERR, "error loading journal"); |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 3958 | jbd2_journal_destroy(journal); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3959 | return err; |
| 3960 | } |
| 3961 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3962 | EXT4_SB(sb)->s_journal = journal; |
| 3963 | ext4_clear_journal_err(sb, es); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3964 | |
Maciej Żenczykowski | c41303c | 2010-10-27 21:30:06 -0400 | [diff] [blame] | 3965 | if (!really_read_only && journal_devnum && |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3966 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { |
| 3967 | es->s_journal_dev = cpu_to_le32(journal_devnum); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3968 | |
| 3969 | /* Make sure we flush the recovery flag to disk. */ |
Theodore Ts'o | e2d6705 | 2009-05-01 00:33:44 -0400 | [diff] [blame] | 3970 | ext4_commit_super(sb, 1); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3971 | } |
| 3972 | |
| 3973 | return 0; |
| 3974 | } |
| 3975 | |
Theodore Ts'o | e2d6705 | 2009-05-01 00:33:44 -0400 | [diff] [blame] | 3976 | static int ext4_commit_super(struct super_block *sb, int sync) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3977 | { |
Theodore Ts'o | e2d6705 | 2009-05-01 00:33:44 -0400 | [diff] [blame] | 3978 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3979 | struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; |
Takashi Sato | c4be0c1 | 2009-01-09 16:40:58 -0800 | [diff] [blame] | 3980 | int error = 0; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3981 | |
Theodore Ts'o | 7c2e708 | 2011-09-09 18:28:51 -0400 | [diff] [blame] | 3982 | if (!sbh || block_device_ejected(sb)) |
Takashi Sato | c4be0c1 | 2009-01-09 16:40:58 -0800 | [diff] [blame] | 3983 | return error; |
Theodore Ts'o | 914258b | 2008-10-06 21:35:40 -0400 | [diff] [blame] | 3984 | if (buffer_write_io_error(sbh)) { |
| 3985 | /* |
| 3986 | * Oh, dear. A previous attempt to write the |
| 3987 | * superblock failed. This could happen because the |
| 3988 | * USB device was yanked out. Or it could happen to |
| 3989 | * be a transient write error and maybe the block will |
| 3990 | * be remapped. Nothing we can do but to retry the |
| 3991 | * write and hope for the best. |
| 3992 | */ |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3993 | ext4_msg(sb, KERN_ERR, "previous I/O error to " |
| 3994 | "superblock detected"); |
Theodore Ts'o | 914258b | 2008-10-06 21:35:40 -0400 | [diff] [blame] | 3995 | clear_buffer_write_io_error(sbh); |
| 3996 | set_buffer_uptodate(sbh); |
| 3997 | } |
Theodore Ts'o | 71290b3 | 2009-09-10 17:31:04 -0400 | [diff] [blame] | 3998 | /* |
| 3999 | * If the file system is mounted read-only, don't update the |
| 4000 | * superblock write time. This avoids updating the superblock |
| 4001 | * write time when we are mounting the root file system |
| 4002 | * read/only but we need to replay the journal; at that point, |
| 4003 | * for people who are east of GMT and who make their clock |
| 4004 | * tick in localtime for Windows bug-for-bug compatibility, |
| 4005 | * the clock is set in the future, and this will cause e2fsck |
| 4006 | * to complain and force a full file system check. |
| 4007 | */ |
| 4008 | if (!(sb->s_flags & MS_RDONLY)) |
| 4009 | es->s_wtime = cpu_to_le32(get_seconds()); |
Theodore Ts'o | f613dfc | 2010-07-27 11:56:08 -0400 | [diff] [blame] | 4010 | if (sb->s_bdev->bd_part) |
| 4011 | es->s_kbytes_written = |
| 4012 | cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + |
Theodore Ts'o | afc32f7 | 2009-02-28 19:39:58 -0500 | [diff] [blame] | 4013 | ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - |
| 4014 | EXT4_SB(sb)->s_sectors_written_start) >> 1)); |
Theodore Ts'o | f613dfc | 2010-07-27 11:56:08 -0400 | [diff] [blame] | 4015 | else |
| 4016 | es->s_kbytes_written = |
| 4017 | cpu_to_le64(EXT4_SB(sb)->s_kbytes_written); |
Theodore Ts'o | 5704265 | 2011-09-09 18:56:51 -0400 | [diff] [blame] | 4018 | ext4_free_blocks_count_set(es, |
| 4019 | EXT4_C2B(EXT4_SB(sb), percpu_counter_sum_positive( |
| 4020 | &EXT4_SB(sb)->s_freeclusters_counter))); |
Theodore Ts'o | ce7e010 | 2010-11-03 12:03:21 -0400 | [diff] [blame] | 4021 | es->s_free_inodes_count = |
| 4022 | cpu_to_le32(percpu_counter_sum_positive( |
| 4023 | &EXT4_SB(sb)->s_freeinodes_counter)); |
Theodore Ts'o | 7234ab2 | 2009-04-30 21:24:04 -0400 | [diff] [blame] | 4024 | sb->s_dirt = 0; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4025 | BUFFER_TRACE(sbh, "marking dirty"); |
| 4026 | mark_buffer_dirty(sbh); |
Theodore Ts'o | 914258b | 2008-10-06 21:35:40 -0400 | [diff] [blame] | 4027 | if (sync) { |
Takashi Sato | c4be0c1 | 2009-01-09 16:40:58 -0800 | [diff] [blame] | 4028 | error = sync_dirty_buffer(sbh); |
| 4029 | if (error) |
| 4030 | return error; |
| 4031 | |
| 4032 | error = buffer_write_io_error(sbh); |
| 4033 | if (error) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 4034 | ext4_msg(sb, KERN_ERR, "I/O error while writing " |
| 4035 | "superblock"); |
Theodore Ts'o | 914258b | 2008-10-06 21:35:40 -0400 | [diff] [blame] | 4036 | clear_buffer_write_io_error(sbh); |
| 4037 | set_buffer_uptodate(sbh); |
| 4038 | } |
| 4039 | } |
Takashi Sato | c4be0c1 | 2009-01-09 16:40:58 -0800 | [diff] [blame] | 4040 | return error; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4041 | } |
| 4042 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4043 | /* |
| 4044 | * Have we just finished recovery? If so, and if we are mounting (or |
| 4045 | * remounting) the filesystem readonly, then we will end up with a |
| 4046 | * consistent fs on disk. Record that fact. |
| 4047 | */ |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 4048 | static void ext4_mark_recovery_complete(struct super_block *sb, |
| 4049 | struct ext4_super_block *es) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4050 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4051 | journal_t *journal = EXT4_SB(sb)->s_journal; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4052 | |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 4053 | if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { |
| 4054 | BUG_ON(journal != NULL); |
| 4055 | return; |
| 4056 | } |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 4057 | jbd2_journal_lock_updates(journal); |
Hidehiro Kawai | 7ffe1ea | 2008-10-10 20:29:21 -0400 | [diff] [blame] | 4058 | if (jbd2_journal_flush(journal) < 0) |
| 4059 | goto out; |
| 4060 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4061 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4062 | sb->s_flags & MS_RDONLY) { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4063 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
Theodore Ts'o | e2d6705 | 2009-05-01 00:33:44 -0400 | [diff] [blame] | 4064 | ext4_commit_super(sb, 1); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4065 | } |
Hidehiro Kawai | 7ffe1ea | 2008-10-10 20:29:21 -0400 | [diff] [blame] | 4066 | |
| 4067 | out: |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 4068 | jbd2_journal_unlock_updates(journal); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4069 | } |
| 4070 | |
| 4071 | /* |
| 4072 | * If we are mounting (or read-write remounting) a filesystem whose journal |
| 4073 | * has recorded an error from a previous lifetime, move that error to the |
| 4074 | * main filesystem now. |
| 4075 | */ |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 4076 | static void ext4_clear_journal_err(struct super_block *sb, |
| 4077 | struct ext4_super_block *es) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4078 | { |
| 4079 | journal_t *journal; |
| 4080 | int j_errno; |
| 4081 | const char *errstr; |
| 4082 | |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 4083 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
| 4084 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4085 | journal = EXT4_SB(sb)->s_journal; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4086 | |
| 4087 | /* |
| 4088 | * 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] | 4089 | * journal by a prior ext4_error() or ext4_abort() |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4090 | */ |
| 4091 | |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 4092 | j_errno = jbd2_journal_errno(journal); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4093 | if (j_errno) { |
| 4094 | char nbuf[16]; |
| 4095 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4096 | errstr = ext4_decode_error(sb, j_errno, nbuf); |
Eric Sandeen | 12062dd | 2010-02-15 14:19:27 -0500 | [diff] [blame] | 4097 | ext4_warning(sb, "Filesystem error recorded " |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4098 | "from previous mount: %s", errstr); |
Eric Sandeen | 12062dd | 2010-02-15 14:19:27 -0500 | [diff] [blame] | 4099 | ext4_warning(sb, "Marking fs in need of filesystem check."); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4100 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4101 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; |
| 4102 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); |
Theodore Ts'o | e2d6705 | 2009-05-01 00:33:44 -0400 | [diff] [blame] | 4103 | ext4_commit_super(sb, 1); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4104 | |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 4105 | jbd2_journal_clear_err(journal); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4106 | } |
| 4107 | } |
| 4108 | |
| 4109 | /* |
| 4110 | * Force the running and committing transactions to commit, |
| 4111 | * and wait on the commit. |
| 4112 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4113 | int ext4_force_commit(struct super_block *sb) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4114 | { |
| 4115 | journal_t *journal; |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 4116 | int ret = 0; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4117 | |
| 4118 | if (sb->s_flags & MS_RDONLY) |
| 4119 | return 0; |
| 4120 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4121 | journal = EXT4_SB(sb)->s_journal; |
Eric Sandeen | 6b0310f | 2010-05-16 02:00:00 -0400 | [diff] [blame] | 4122 | if (journal) { |
Eric Sandeen | 437f88c | 2010-08-01 17:33:29 -0400 | [diff] [blame] | 4123 | vfs_check_frozen(sb, SB_FREEZE_TRANS); |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 4124 | ret = ext4_journal_force_commit(journal); |
Eric Sandeen | 6b0310f | 2010-05-16 02:00:00 -0400 | [diff] [blame] | 4125 | } |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 4126 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4127 | return ret; |
| 4128 | } |
| 4129 | |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 4130 | static void ext4_write_super(struct super_block *sb) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4131 | { |
Christoph Hellwig | ebc1ac1 | 2009-05-11 23:35:03 +0200 | [diff] [blame] | 4132 | lock_super(sb); |
Theodore Ts'o | 9ca9238 | 2009-05-01 12:52:25 -0400 | [diff] [blame] | 4133 | ext4_commit_super(sb, 1); |
Christoph Hellwig | ebc1ac1 | 2009-05-11 23:35:03 +0200 | [diff] [blame] | 4134 | unlock_super(sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4135 | } |
| 4136 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4137 | static int ext4_sync_fs(struct super_block *sb, int wait) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4138 | { |
Theodore Ts'o | 14ce0cb | 2008-11-03 18:10:55 -0500 | [diff] [blame] | 4139 | int ret = 0; |
Jan Kara | 9eddacf | 2009-02-10 06:46:05 -0500 | [diff] [blame] | 4140 | tid_t target; |
Mingming Cao | 8d5d02e | 2009-09-28 15:48:29 -0400 | [diff] [blame] | 4141 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4142 | |
Theodore Ts'o | 9bffad1 | 2009-06-17 11:48:11 -0400 | [diff] [blame] | 4143 | trace_ext4_sync_fs(sb, wait); |
Mingming Cao | 8d5d02e | 2009-09-28 15:48:29 -0400 | [diff] [blame] | 4144 | flush_workqueue(sbi->dio_unwritten_wq); |
| 4145 | if (jbd2_journal_start_commit(sbi->s_journal, &target)) { |
Theodore Ts'o | 9ca9238 | 2009-05-01 12:52:25 -0400 | [diff] [blame] | 4146 | if (wait) |
Mingming Cao | 8d5d02e | 2009-09-28 15:48:29 -0400 | [diff] [blame] | 4147 | jbd2_log_wait_commit(sbi->s_journal, target); |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 4148 | } |
Theodore Ts'o | 14ce0cb | 2008-11-03 18:10:55 -0500 | [diff] [blame] | 4149 | return ret; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4150 | } |
| 4151 | |
| 4152 | /* |
| 4153 | * LVM calls this function before a (read-only) snapshot is created. This |
| 4154 | * 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] | 4155 | * |
| 4156 | * Note that only this function cannot bring a filesystem to be in a clean |
| 4157 | * state independently, because ext4 prevents a new handle from being started |
| 4158 | * by @sb->s_frozen, which stays in an upper layer. It thus needs help from |
| 4159 | * the upper layer. |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4160 | */ |
Takashi Sato | c4be0c1 | 2009-01-09 16:40:58 -0800 | [diff] [blame] | 4161 | static int ext4_freeze(struct super_block *sb) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4162 | { |
Takashi Sato | c4be0c1 | 2009-01-09 16:40:58 -0800 | [diff] [blame] | 4163 | int error = 0; |
| 4164 | journal_t *journal; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4165 | |
Theodore Ts'o | 9ca9238 | 2009-05-01 12:52:25 -0400 | [diff] [blame] | 4166 | if (sb->s_flags & MS_RDONLY) |
| 4167 | return 0; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4168 | |
Theodore Ts'o | 9ca9238 | 2009-05-01 12:52:25 -0400 | [diff] [blame] | 4169 | journal = EXT4_SB(sb)->s_journal; |
Hidehiro Kawai | 7ffe1ea | 2008-10-10 20:29:21 -0400 | [diff] [blame] | 4170 | |
Theodore Ts'o | 9ca9238 | 2009-05-01 12:52:25 -0400 | [diff] [blame] | 4171 | /* Now we set up the journal barrier. */ |
| 4172 | jbd2_journal_lock_updates(journal); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4173 | |
Theodore Ts'o | 9ca9238 | 2009-05-01 12:52:25 -0400 | [diff] [blame] | 4174 | /* |
| 4175 | * Don't clear the needs_recovery flag if we failed to flush |
| 4176 | * the journal. |
| 4177 | */ |
| 4178 | error = jbd2_journal_flush(journal); |
Eric Sandeen | 6b0310f | 2010-05-16 02:00:00 -0400 | [diff] [blame] | 4179 | if (error < 0) |
| 4180 | goto out; |
Theodore Ts'o | 9ca9238 | 2009-05-01 12:52:25 -0400 | [diff] [blame] | 4181 | |
| 4182 | /* Journal blocked and flushed, clear needs_recovery flag. */ |
| 4183 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
| 4184 | error = ext4_commit_super(sb, 1); |
Eric Sandeen | 6b0310f | 2010-05-16 02:00:00 -0400 | [diff] [blame] | 4185 | out: |
| 4186 | /* we rely on s_frozen to stop further updates */ |
| 4187 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); |
| 4188 | return error; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4189 | } |
| 4190 | |
| 4191 | /* |
| 4192 | * Called by LVM after the snapshot is done. We need to reset the RECOVER |
| 4193 | * flag here, even though the filesystem is not technically dirty yet. |
| 4194 | */ |
Takashi Sato | c4be0c1 | 2009-01-09 16:40:58 -0800 | [diff] [blame] | 4195 | static int ext4_unfreeze(struct super_block *sb) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4196 | { |
Theodore Ts'o | 9ca9238 | 2009-05-01 12:52:25 -0400 | [diff] [blame] | 4197 | if (sb->s_flags & MS_RDONLY) |
| 4198 | return 0; |
| 4199 | |
| 4200 | lock_super(sb); |
| 4201 | /* Reset the needs_recovery flag before the fs is unlocked. */ |
| 4202 | EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
| 4203 | ext4_commit_super(sb, 1); |
| 4204 | unlock_super(sb); |
Takashi Sato | c4be0c1 | 2009-01-09 16:40:58 -0800 | [diff] [blame] | 4205 | return 0; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4206 | } |
| 4207 | |
Theodore Ts'o | 673c610 | 2010-12-15 20:28:48 -0500 | [diff] [blame] | 4208 | /* |
| 4209 | * Structure to save mount options for ext4_remount's benefit |
| 4210 | */ |
| 4211 | struct ext4_mount_options { |
| 4212 | unsigned long s_mount_opt; |
Theodore Ts'o | a2595b8 | 2010-12-15 20:30:48 -0500 | [diff] [blame] | 4213 | unsigned long s_mount_opt2; |
Theodore Ts'o | 673c610 | 2010-12-15 20:28:48 -0500 | [diff] [blame] | 4214 | uid_t s_resuid; |
| 4215 | gid_t s_resgid; |
| 4216 | unsigned long s_commit_interval; |
| 4217 | u32 s_min_batch_time, s_max_batch_time; |
| 4218 | #ifdef CONFIG_QUOTA |
| 4219 | int s_jquota_fmt; |
| 4220 | char *s_qf_names[MAXQUOTAS]; |
| 4221 | #endif |
| 4222 | }; |
| 4223 | |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 4224 | static int ext4_remount(struct super_block *sb, int *flags, char *data) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4225 | { |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 4226 | struct ext4_super_block *es; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4227 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4228 | unsigned long old_sb_flags; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4229 | struct ext4_mount_options old_opts; |
Christoph Hellwig | c79d967 | 2010-05-19 07:16:40 -0400 | [diff] [blame] | 4230 | int enable_quota = 0; |
Theodore Ts'o | 8a26646 | 2008-07-26 14:34:21 -0400 | [diff] [blame] | 4231 | ext4_group_t g; |
Theodore Ts'o | b3881f7 | 2009-01-05 22:46:26 -0500 | [diff] [blame] | 4232 | unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; |
Johann Lombardi | c5e06d1 | 2011-05-24 18:31:25 -0400 | [diff] [blame] | 4233 | int err = 0; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4234 | #ifdef CONFIG_QUOTA |
| 4235 | int i; |
| 4236 | #endif |
Curt Wohlgemuth | d4c402d | 2010-05-16 12:00:00 -0400 | [diff] [blame] | 4237 | char *orig_data = kstrdup(data, GFP_KERNEL); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4238 | |
| 4239 | /* Store the original options */ |
Al Viro | bbd6851 | 2009-05-06 10:43:07 -0400 | [diff] [blame] | 4240 | lock_super(sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4241 | old_sb_flags = sb->s_flags; |
| 4242 | old_opts.s_mount_opt = sbi->s_mount_opt; |
Theodore Ts'o | a2595b8 | 2010-12-15 20:30:48 -0500 | [diff] [blame] | 4243 | old_opts.s_mount_opt2 = sbi->s_mount_opt2; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4244 | old_opts.s_resuid = sbi->s_resuid; |
| 4245 | old_opts.s_resgid = sbi->s_resgid; |
| 4246 | old_opts.s_commit_interval = sbi->s_commit_interval; |
Theodore Ts'o | 3077384 | 2009-01-03 20:27:38 -0500 | [diff] [blame] | 4247 | old_opts.s_min_batch_time = sbi->s_min_batch_time; |
| 4248 | old_opts.s_max_batch_time = sbi->s_max_batch_time; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4249 | #ifdef CONFIG_QUOTA |
| 4250 | old_opts.s_jquota_fmt = sbi->s_jquota_fmt; |
| 4251 | for (i = 0; i < MAXQUOTAS; i++) |
| 4252 | old_opts.s_qf_names[i] = sbi->s_qf_names[i]; |
| 4253 | #endif |
Theodore Ts'o | b3881f7 | 2009-01-05 22:46:26 -0500 | [diff] [blame] | 4254 | if (sbi->s_journal && sbi->s_journal->j_task->io_context) |
| 4255 | journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4256 | |
| 4257 | /* |
| 4258 | * Allow the "check" option to be passed as a remount option. |
| 4259 | */ |
Eric Sandeen | 661aa52 | 2012-02-20 17:53:04 -0500 | [diff] [blame] | 4260 | if (!parse_options(data, sb, NULL, &journal_ioprio, 1)) { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4261 | err = -EINVAL; |
| 4262 | goto restore_opts; |
| 4263 | } |
| 4264 | |
Theodore Ts'o | 4ab2f15 | 2009-06-13 10:09:36 -0400 | [diff] [blame] | 4265 | if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) |
Theodore Ts'o | c67d859 | 2010-06-29 11:07:07 -0400 | [diff] [blame] | 4266 | ext4_abort(sb, "Abort forced by user"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4267 | |
| 4268 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | |
Dmitry Monakhov | 482a742 | 2010-02-24 11:35:32 -0500 | [diff] [blame] | 4269 | (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4270 | |
| 4271 | es = sbi->s_es; |
| 4272 | |
Theodore Ts'o | b3881f7 | 2009-01-05 22:46:26 -0500 | [diff] [blame] | 4273 | if (sbi->s_journal) { |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 4274 | ext4_init_journal_params(sb, sbi->s_journal); |
Theodore Ts'o | b3881f7 | 2009-01-05 22:46:26 -0500 | [diff] [blame] | 4275 | set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); |
| 4276 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4277 | |
Eric Sandeen | 661aa52 | 2012-02-20 17:53:04 -0500 | [diff] [blame] | 4278 | if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) { |
Theodore Ts'o | 4ab2f15 | 2009-06-13 10:09:36 -0400 | [diff] [blame] | 4279 | if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4280 | err = -EROFS; |
| 4281 | goto restore_opts; |
| 4282 | } |
| 4283 | |
| 4284 | if (*flags & MS_RDONLY) { |
Christoph Hellwig | 0f0dd62 | 2010-05-19 07:16:41 -0400 | [diff] [blame] | 4285 | err = dquot_suspend(sb, -1); |
| 4286 | if (err < 0) |
Christoph Hellwig | c79d967 | 2010-05-19 07:16:40 -0400 | [diff] [blame] | 4287 | goto restore_opts; |
Christoph Hellwig | c79d967 | 2010-05-19 07:16:40 -0400 | [diff] [blame] | 4288 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4289 | /* |
| 4290 | * First of all, the unconditional stuff we have to do |
| 4291 | * to disable replay of the journal when we next remount |
| 4292 | */ |
| 4293 | sb->s_flags |= MS_RDONLY; |
| 4294 | |
| 4295 | /* |
| 4296 | * OK, test if we are remounting a valid rw partition |
| 4297 | * readonly, and if so set the rdonly flag and then |
| 4298 | * mark the partition as valid again. |
| 4299 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4300 | if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && |
| 4301 | (sbi->s_mount_state & EXT4_VALID_FS)) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4302 | es->s_state = cpu_to_le16(sbi->s_mount_state); |
| 4303 | |
Theodore Ts'o | a63c9eb | 2009-05-01 01:59:42 -0400 | [diff] [blame] | 4304 | if (sbi->s_journal) |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 4305 | ext4_mark_recovery_complete(sb, es); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4306 | } else { |
Eric Sandeen | a13fb1a | 2009-08-18 00:20:23 -0400 | [diff] [blame] | 4307 | /* Make sure we can mount this feature set readwrite */ |
| 4308 | if (!ext4_feature_set_ok(sb, 0)) { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4309 | err = -EROFS; |
| 4310 | goto restore_opts; |
| 4311 | } |
Eric Sandeen | ead6596 | 2007-02-10 01:46:08 -0800 | [diff] [blame] | 4312 | /* |
Theodore Ts'o | 8a26646 | 2008-07-26 14:34:21 -0400 | [diff] [blame] | 4313 | * Make sure the group descriptor checksums |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 4314 | * are sane. If they aren't, refuse to remount r/w. |
Theodore Ts'o | 8a26646 | 2008-07-26 14:34:21 -0400 | [diff] [blame] | 4315 | */ |
| 4316 | for (g = 0; g < sbi->s_groups_count; g++) { |
| 4317 | struct ext4_group_desc *gdp = |
| 4318 | ext4_get_group_desc(sb, g, NULL); |
| 4319 | |
| 4320 | if (!ext4_group_desc_csum_verify(sbi, g, gdp)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 4321 | ext4_msg(sb, KERN_ERR, |
| 4322 | "ext4_remount: Checksum for group %u failed (%u!=%u)", |
Theodore Ts'o | 8a26646 | 2008-07-26 14:34:21 -0400 | [diff] [blame] | 4323 | g, le16_to_cpu(ext4_group_desc_csum(sbi, g, gdp)), |
| 4324 | le16_to_cpu(gdp->bg_checksum)); |
| 4325 | err = -EINVAL; |
| 4326 | goto restore_opts; |
| 4327 | } |
| 4328 | } |
| 4329 | |
| 4330 | /* |
Eric Sandeen | ead6596 | 2007-02-10 01:46:08 -0800 | [diff] [blame] | 4331 | * If we have an unprocessed orphan list hanging |
| 4332 | * around from a previously readonly bdev mount, |
| 4333 | * require a full umount/remount for now. |
| 4334 | */ |
| 4335 | if (es->s_last_orphan) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 4336 | ext4_msg(sb, KERN_WARNING, "Couldn't " |
Eric Sandeen | ead6596 | 2007-02-10 01:46:08 -0800 | [diff] [blame] | 4337 | "remount RDWR because of unprocessed " |
| 4338 | "orphan inode list. Please " |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 4339 | "umount/remount instead"); |
Eric Sandeen | ead6596 | 2007-02-10 01:46:08 -0800 | [diff] [blame] | 4340 | err = -EINVAL; |
| 4341 | goto restore_opts; |
| 4342 | } |
| 4343 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4344 | /* |
| 4345 | * Mounting a RDONLY partition read-write, so reread |
| 4346 | * and store the current valid flag. (It may have |
| 4347 | * been changed by e2fsck since we originally mounted |
| 4348 | * the partition.) |
| 4349 | */ |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 4350 | if (sbi->s_journal) |
| 4351 | ext4_clear_journal_err(sb, es); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4352 | sbi->s_mount_state = le16_to_cpu(es->s_state); |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 4353 | if (!ext4_setup_super(sb, es, 0)) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4354 | sb->s_flags &= ~MS_RDONLY; |
Johann Lombardi | c5e06d1 | 2011-05-24 18:31:25 -0400 | [diff] [blame] | 4355 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, |
| 4356 | EXT4_FEATURE_INCOMPAT_MMP)) |
| 4357 | if (ext4_multi_mount_protect(sb, |
| 4358 | le64_to_cpu(es->s_mmp_block))) { |
| 4359 | err = -EROFS; |
| 4360 | goto restore_opts; |
| 4361 | } |
Christoph Hellwig | c79d967 | 2010-05-19 07:16:40 -0400 | [diff] [blame] | 4362 | enable_quota = 1; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4363 | } |
| 4364 | } |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 4365 | |
| 4366 | /* |
| 4367 | * Reinitialize lazy itable initialization thread based on |
| 4368 | * current settings |
| 4369 | */ |
| 4370 | if ((sb->s_flags & MS_RDONLY) || !test_opt(sb, INIT_INODE_TABLE)) |
| 4371 | ext4_unregister_li_request(sb); |
| 4372 | else { |
| 4373 | ext4_group_t first_not_zeroed; |
| 4374 | first_not_zeroed = ext4_has_uninit_itable(sb); |
| 4375 | ext4_register_li_request(sb, first_not_zeroed); |
| 4376 | } |
| 4377 | |
Theodore Ts'o | 6fd058f | 2009-05-17 15:38:01 -0400 | [diff] [blame] | 4378 | ext4_setup_system_zone(sb); |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 4379 | if (sbi->s_journal == NULL) |
Theodore Ts'o | e2d6705 | 2009-05-01 00:33:44 -0400 | [diff] [blame] | 4380 | ext4_commit_super(sb, 1); |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 4381 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4382 | #ifdef CONFIG_QUOTA |
| 4383 | /* Release old quota file names */ |
| 4384 | for (i = 0; i < MAXQUOTAS; i++) |
| 4385 | if (old_opts.s_qf_names[i] && |
| 4386 | old_opts.s_qf_names[i] != sbi->s_qf_names[i]) |
| 4387 | kfree(old_opts.s_qf_names[i]); |
| 4388 | #endif |
Al Viro | bbd6851 | 2009-05-06 10:43:07 -0400 | [diff] [blame] | 4389 | unlock_super(sb); |
Christoph Hellwig | c79d967 | 2010-05-19 07:16:40 -0400 | [diff] [blame] | 4390 | if (enable_quota) |
Christoph Hellwig | 0f0dd62 | 2010-05-19 07:16:41 -0400 | [diff] [blame] | 4391 | dquot_resume(sb, -1); |
Curt Wohlgemuth | d4c402d | 2010-05-16 12:00:00 -0400 | [diff] [blame] | 4392 | |
| 4393 | ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s", orig_data); |
| 4394 | kfree(orig_data); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4395 | return 0; |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 4396 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4397 | restore_opts: |
| 4398 | sb->s_flags = old_sb_flags; |
| 4399 | sbi->s_mount_opt = old_opts.s_mount_opt; |
Theodore Ts'o | a2595b8 | 2010-12-15 20:30:48 -0500 | [diff] [blame] | 4400 | sbi->s_mount_opt2 = old_opts.s_mount_opt2; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4401 | sbi->s_resuid = old_opts.s_resuid; |
| 4402 | sbi->s_resgid = old_opts.s_resgid; |
| 4403 | sbi->s_commit_interval = old_opts.s_commit_interval; |
Theodore Ts'o | 3077384 | 2009-01-03 20:27:38 -0500 | [diff] [blame] | 4404 | sbi->s_min_batch_time = old_opts.s_min_batch_time; |
| 4405 | sbi->s_max_batch_time = old_opts.s_max_batch_time; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4406 | #ifdef CONFIG_QUOTA |
| 4407 | sbi->s_jquota_fmt = old_opts.s_jquota_fmt; |
| 4408 | for (i = 0; i < MAXQUOTAS; i++) { |
| 4409 | if (sbi->s_qf_names[i] && |
| 4410 | old_opts.s_qf_names[i] != sbi->s_qf_names[i]) |
| 4411 | kfree(sbi->s_qf_names[i]); |
| 4412 | sbi->s_qf_names[i] = old_opts.s_qf_names[i]; |
| 4413 | } |
| 4414 | #endif |
Al Viro | bbd6851 | 2009-05-06 10:43:07 -0400 | [diff] [blame] | 4415 | unlock_super(sb); |
Curt Wohlgemuth | d4c402d | 2010-05-16 12:00:00 -0400 | [diff] [blame] | 4416 | kfree(orig_data); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4417 | return err; |
| 4418 | } |
| 4419 | |
Theodore Ts'o | f975d6b | 2011-09-09 19:00:51 -0400 | [diff] [blame] | 4420 | /* |
| 4421 | * Note: calculating the overhead so we can be compatible with |
| 4422 | * historical BSD practice is quite difficult in the face of |
| 4423 | * clusters/bigalloc. This is because multiple metadata blocks from |
| 4424 | * different block group can end up in the same allocation cluster. |
| 4425 | * Calculating the exact overhead in the face of clustered allocation |
| 4426 | * requires either O(all block bitmaps) in memory or O(number of block |
| 4427 | * groups**2) in time. We will still calculate the superblock for |
| 4428 | * older file systems --- and if we come across with a bigalloc file |
| 4429 | * system with zero in s_overhead_clusters the estimate will be close to |
| 4430 | * correct especially for very large cluster sizes --- but for newer |
| 4431 | * file systems, it's better to calculate this figure once at mkfs |
| 4432 | * time, and store it in the superblock. If the superblock value is |
| 4433 | * present (even for non-bigalloc file systems), we will use it. |
| 4434 | */ |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 4435 | static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4436 | { |
| 4437 | struct super_block *sb = dentry->d_sb; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4438 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
| 4439 | struct ext4_super_block *es = sbi->s_es; |
Theodore Ts'o | f975d6b | 2011-09-09 19:00:51 -0400 | [diff] [blame] | 4440 | struct ext4_group_desc *gdp; |
Pekka Enberg | 960cc39 | 2006-12-06 20:35:29 -0800 | [diff] [blame] | 4441 | u64 fsid; |
Kazuya Mio | d02a939 | 2011-05-24 18:30:07 -0400 | [diff] [blame] | 4442 | s64 bfree; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4443 | |
Badari Pulavarty | 5e70030 | 2007-07-15 23:42:00 -0700 | [diff] [blame] | 4444 | if (test_opt(sb, MINIX_DF)) { |
| 4445 | sbi->s_overhead_last = 0; |
Theodore Ts'o | f975d6b | 2011-09-09 19:00:51 -0400 | [diff] [blame] | 4446 | } else if (es->s_overhead_clusters) { |
| 4447 | sbi->s_overhead_last = le32_to_cpu(es->s_overhead_clusters); |
Aneesh Kumar K.V | 6bc9fef | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 4448 | } else if (sbi->s_blocks_last != ext4_blocks_count(es)) { |
Theodore Ts'o | 8df9675 | 2009-05-01 08:50:38 -0400 | [diff] [blame] | 4449 | ext4_group_t i, ngroups = ext4_get_groups_count(sb); |
Badari Pulavarty | 5e70030 | 2007-07-15 23:42:00 -0700 | [diff] [blame] | 4450 | ext4_fsblk_t overhead = 0; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4451 | |
| 4452 | /* |
Badari Pulavarty | 5e70030 | 2007-07-15 23:42:00 -0700 | [diff] [blame] | 4453 | * Compute the overhead (FS structures). This is constant |
| 4454 | * for a given filesystem unless the number of block groups |
| 4455 | * changes so we cache the previous value until it does. |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4456 | */ |
| 4457 | |
| 4458 | /* |
| 4459 | * All of the blocks before first_data_block are |
| 4460 | * overhead |
| 4461 | */ |
Theodore Ts'o | f975d6b | 2011-09-09 19:00:51 -0400 | [diff] [blame] | 4462 | overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block)); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4463 | |
| 4464 | /* |
Theodore Ts'o | f975d6b | 2011-09-09 19:00:51 -0400 | [diff] [blame] | 4465 | * Add the overhead found in each block group |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4466 | */ |
| 4467 | for (i = 0; i < ngroups; i++) { |
Theodore Ts'o | f975d6b | 2011-09-09 19:00:51 -0400 | [diff] [blame] | 4468 | gdp = ext4_get_group_desc(sb, i, NULL); |
| 4469 | overhead += ext4_num_overhead_clusters(sb, i, gdp); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4470 | cond_resched(); |
| 4471 | } |
Badari Pulavarty | 5e70030 | 2007-07-15 23:42:00 -0700 | [diff] [blame] | 4472 | sbi->s_overhead_last = overhead; |
| 4473 | smp_wmb(); |
Aneesh Kumar K.V | 6bc9fef | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 4474 | sbi->s_blocks_last = ext4_blocks_count(es); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4475 | } |
| 4476 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4477 | buf->f_type = EXT4_SUPER_MAGIC; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4478 | buf->f_bsize = sb->s_blocksize; |
Theodore Ts'o | f975d6b | 2011-09-09 19:00:51 -0400 | [diff] [blame] | 4479 | buf->f_blocks = (ext4_blocks_count(es) - |
| 4480 | EXT4_C2B(sbi, sbi->s_overhead_last)); |
Theodore Ts'o | 5704265 | 2011-09-09 18:56:51 -0400 | [diff] [blame] | 4481 | bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) - |
| 4482 | percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter); |
Kazuya Mio | d02a939 | 2011-05-24 18:30:07 -0400 | [diff] [blame] | 4483 | /* prevent underflow in case that few free space is available */ |
Theodore Ts'o | 5704265 | 2011-09-09 18:56:51 -0400 | [diff] [blame] | 4484 | buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0)); |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 4485 | buf->f_bavail = buf->f_bfree - ext4_r_blocks_count(es); |
| 4486 | if (buf->f_bfree < ext4_r_blocks_count(es)) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4487 | buf->f_bavail = 0; |
| 4488 | buf->f_files = le32_to_cpu(es->s_inodes_count); |
Peter Zijlstra | 52d9f3b | 2007-10-16 23:25:44 -0700 | [diff] [blame] | 4489 | buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4490 | buf->f_namelen = EXT4_NAME_LEN; |
Pekka Enberg | 960cc39 | 2006-12-06 20:35:29 -0800 | [diff] [blame] | 4491 | fsid = le64_to_cpup((void *)es->s_uuid) ^ |
| 4492 | le64_to_cpup((void *)es->s_uuid + sizeof(u64)); |
| 4493 | buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; |
| 4494 | buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 4495 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4496 | return 0; |
| 4497 | } |
| 4498 | |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 4499 | /* Helper function for writing quotas on sync - we need to start transaction |
| 4500 | * before quota file is locked for write. Otherwise the are possible deadlocks: |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4501 | * Process 1 Process 2 |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4502 | * ext4_create() quota_sync() |
Jan Kara | a269eb1 | 2009-01-26 17:04:39 +0100 | [diff] [blame] | 4503 | * jbd2_journal_start() write_dquot() |
Christoph Hellwig | 871a293 | 2010-03-03 09:05:07 -0500 | [diff] [blame] | 4504 | * dquot_initialize() down(dqio_mutex) |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 4505 | * down(dqio_mutex) jbd2_journal_start() |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4506 | * |
| 4507 | */ |
| 4508 | |
| 4509 | #ifdef CONFIG_QUOTA |
| 4510 | |
| 4511 | static inline struct inode *dquot_to_inode(struct dquot *dquot) |
| 4512 | { |
| 4513 | return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type]; |
| 4514 | } |
| 4515 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4516 | static int ext4_write_dquot(struct dquot *dquot) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4517 | { |
| 4518 | int ret, err; |
| 4519 | handle_t *handle; |
| 4520 | struct inode *inode; |
| 4521 | |
| 4522 | inode = dquot_to_inode(dquot); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4523 | handle = ext4_journal_start(inode, |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 4524 | EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4525 | if (IS_ERR(handle)) |
| 4526 | return PTR_ERR(handle); |
| 4527 | ret = dquot_commit(dquot); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4528 | err = ext4_journal_stop(handle); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4529 | if (!ret) |
| 4530 | ret = err; |
| 4531 | return ret; |
| 4532 | } |
| 4533 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4534 | static int ext4_acquire_dquot(struct dquot *dquot) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4535 | { |
| 4536 | int ret, err; |
| 4537 | handle_t *handle; |
| 4538 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4539 | handle = ext4_journal_start(dquot_to_inode(dquot), |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 4540 | EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4541 | if (IS_ERR(handle)) |
| 4542 | return PTR_ERR(handle); |
| 4543 | ret = dquot_acquire(dquot); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4544 | err = ext4_journal_stop(handle); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4545 | if (!ret) |
| 4546 | ret = err; |
| 4547 | return ret; |
| 4548 | } |
| 4549 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4550 | static int ext4_release_dquot(struct dquot *dquot) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4551 | { |
| 4552 | int ret, err; |
| 4553 | handle_t *handle; |
| 4554 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4555 | handle = ext4_journal_start(dquot_to_inode(dquot), |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 4556 | EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); |
Jan Kara | 9c3013e | 2007-09-11 15:23:29 -0700 | [diff] [blame] | 4557 | if (IS_ERR(handle)) { |
| 4558 | /* Release dquot anyway to avoid endless cycle in dqput() */ |
| 4559 | dquot_release(dquot); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4560 | return PTR_ERR(handle); |
Jan Kara | 9c3013e | 2007-09-11 15:23:29 -0700 | [diff] [blame] | 4561 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4562 | ret = dquot_release(dquot); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4563 | err = ext4_journal_stop(handle); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4564 | if (!ret) |
| 4565 | ret = err; |
| 4566 | return ret; |
| 4567 | } |
| 4568 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4569 | static int ext4_mark_dquot_dirty(struct dquot *dquot) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4570 | { |
Jan Kara | 2c8be6b | 2008-05-13 21:27:55 -0400 | [diff] [blame] | 4571 | /* Are we journaling quotas? */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4572 | if (EXT4_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || |
| 4573 | EXT4_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4574 | dquot_mark_dquot_dirty(dquot); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4575 | return ext4_write_dquot(dquot); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4576 | } else { |
| 4577 | return dquot_mark_dquot_dirty(dquot); |
| 4578 | } |
| 4579 | } |
| 4580 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4581 | static int ext4_write_info(struct super_block *sb, int type) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4582 | { |
| 4583 | int ret, err; |
| 4584 | handle_t *handle; |
| 4585 | |
| 4586 | /* Data block + inode block */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4587 | handle = ext4_journal_start(sb->s_root->d_inode, 2); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4588 | if (IS_ERR(handle)) |
| 4589 | return PTR_ERR(handle); |
| 4590 | ret = dquot_commit_info(sb, type); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4591 | err = ext4_journal_stop(handle); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4592 | if (!ret) |
| 4593 | ret = err; |
| 4594 | return ret; |
| 4595 | } |
| 4596 | |
| 4597 | /* |
| 4598 | * Turn on quotas during mount time - we need to find |
| 4599 | * the quota file and such... |
| 4600 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4601 | static int ext4_quota_on_mount(struct super_block *sb, int type) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4602 | { |
Christoph Hellwig | 287a809 | 2010-05-19 07:16:45 -0400 | [diff] [blame] | 4603 | return dquot_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], |
| 4604 | EXT4_SB(sb)->s_jquota_fmt, type); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4605 | } |
| 4606 | |
| 4607 | /* |
| 4608 | * Standard function to be called on quota_on |
| 4609 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4610 | 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] | 4611 | struct path *path) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4612 | { |
| 4613 | int err; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4614 | |
| 4615 | if (!test_opt(sb, QUOTA)) |
| 4616 | return -EINVAL; |
Jan Kara | 0623543 | 2008-05-13 19:11:51 -0400 | [diff] [blame] | 4617 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4618 | /* Quotafile not on the same filesystem? */ |
Al Viro | d8c9584 | 2011-12-07 18:16:57 -0500 | [diff] [blame] | 4619 | if (path->dentry->d_sb != sb) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4620 | return -EXDEV; |
Jan Kara | 0623543 | 2008-05-13 19:11:51 -0400 | [diff] [blame] | 4621 | /* Journaling quota? */ |
| 4622 | if (EXT4_SB(sb)->s_qf_names[type]) { |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 4623 | /* Quotafile not in fs root? */ |
Jan Kara | f00c9e4 | 2010-09-15 17:38:58 +0200 | [diff] [blame] | 4624 | if (path->dentry->d_parent != sb->s_root) |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 4625 | ext4_msg(sb, KERN_WARNING, |
| 4626 | "Quota file not on filesystem root. " |
| 4627 | "Journaled quota will not work"); |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 4628 | } |
Jan Kara | 0623543 | 2008-05-13 19:11:51 -0400 | [diff] [blame] | 4629 | |
| 4630 | /* |
| 4631 | * When we journal data on quota file, we have to flush journal to see |
| 4632 | * all updates to the file when we bypass pagecache... |
| 4633 | */ |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 4634 | if (EXT4_SB(sb)->s_journal && |
Jan Kara | f00c9e4 | 2010-09-15 17:38:58 +0200 | [diff] [blame] | 4635 | ext4_should_journal_data(path->dentry->d_inode)) { |
Jan Kara | 0623543 | 2008-05-13 19:11:51 -0400 | [diff] [blame] | 4636 | /* |
| 4637 | * We don't need to lock updates but journal_flush() could |
| 4638 | * otherwise be livelocked... |
| 4639 | */ |
| 4640 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); |
Hidehiro Kawai | 7ffe1ea | 2008-10-10 20:29:21 -0400 | [diff] [blame] | 4641 | err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); |
Jan Kara | 0623543 | 2008-05-13 19:11:51 -0400 | [diff] [blame] | 4642 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); |
Jan Kara | f00c9e4 | 2010-09-15 17:38:58 +0200 | [diff] [blame] | 4643 | if (err) |
Hidehiro Kawai | 7ffe1ea | 2008-10-10 20:29:21 -0400 | [diff] [blame] | 4644 | return err; |
Jan Kara | 0623543 | 2008-05-13 19:11:51 -0400 | [diff] [blame] | 4645 | } |
| 4646 | |
Jan Kara | f00c9e4 | 2010-09-15 17:38:58 +0200 | [diff] [blame] | 4647 | return dquot_quota_on(sb, type, format_id, path); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4648 | } |
| 4649 | |
Dmitry Monakhov | ca0e05e | 2010-08-01 17:48:36 -0400 | [diff] [blame] | 4650 | static int ext4_quota_off(struct super_block *sb, int type) |
| 4651 | { |
Jan Kara | 21f9769 | 2011-04-04 15:33:39 -0400 | [diff] [blame] | 4652 | struct inode *inode = sb_dqopt(sb)->files[type]; |
| 4653 | handle_t *handle; |
| 4654 | |
Dmitry Monakhov | 87009d8 | 2010-11-08 13:47:33 -0500 | [diff] [blame] | 4655 | /* Force all delayed allocation blocks to be allocated. |
| 4656 | * Caller already holds s_umount sem */ |
| 4657 | if (test_opt(sb, DELALLOC)) |
Dmitry Monakhov | ca0e05e | 2010-08-01 17:48:36 -0400 | [diff] [blame] | 4658 | sync_filesystem(sb); |
Dmitry Monakhov | ca0e05e | 2010-08-01 17:48:36 -0400 | [diff] [blame] | 4659 | |
Amir Goldstein | 0b26859 | 2011-05-16 09:59:13 -0400 | [diff] [blame] | 4660 | if (!inode) |
| 4661 | goto out; |
| 4662 | |
Jan Kara | 21f9769 | 2011-04-04 15:33:39 -0400 | [diff] [blame] | 4663 | /* Update modification times of quota files when userspace can |
| 4664 | * start looking at them */ |
| 4665 | handle = ext4_journal_start(inode, 1); |
| 4666 | if (IS_ERR(handle)) |
| 4667 | goto out; |
| 4668 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; |
| 4669 | ext4_mark_inode_dirty(handle, inode); |
| 4670 | ext4_journal_stop(handle); |
| 4671 | |
| 4672 | out: |
Dmitry Monakhov | ca0e05e | 2010-08-01 17:48:36 -0400 | [diff] [blame] | 4673 | return dquot_quota_off(sb, type); |
| 4674 | } |
| 4675 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4676 | /* Read data from quotafile - avoid pagecache and such because we cannot afford |
| 4677 | * 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] | 4678 | * itself serializes the operations (and no one else should touch the files) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4679 | * we don't have to be afraid of races */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4680 | 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] | 4681 | size_t len, loff_t off) |
| 4682 | { |
| 4683 | struct inode *inode = sb_dqopt(sb)->files[type]; |
Aneesh Kumar K.V | 725d26d | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 4684 | ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4685 | int err = 0; |
| 4686 | int offset = off & (sb->s_blocksize - 1); |
| 4687 | int tocopy; |
| 4688 | size_t toread; |
| 4689 | struct buffer_head *bh; |
| 4690 | loff_t i_size = i_size_read(inode); |
| 4691 | |
| 4692 | if (off > i_size) |
| 4693 | return 0; |
| 4694 | if (off+len > i_size) |
| 4695 | len = i_size-off; |
| 4696 | toread = len; |
| 4697 | while (toread > 0) { |
| 4698 | tocopy = sb->s_blocksize - offset < toread ? |
| 4699 | sb->s_blocksize - offset : toread; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4700 | bh = ext4_bread(NULL, inode, blk, 0, &err); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4701 | if (err) |
| 4702 | return err; |
| 4703 | if (!bh) /* A hole? */ |
| 4704 | memset(data, 0, tocopy); |
| 4705 | else |
| 4706 | memcpy(data, bh->b_data+offset, tocopy); |
| 4707 | brelse(bh); |
| 4708 | offset = 0; |
| 4709 | toread -= tocopy; |
| 4710 | data += tocopy; |
| 4711 | blk++; |
| 4712 | } |
| 4713 | return len; |
| 4714 | } |
| 4715 | |
| 4716 | /* Write to quotafile (we know the transaction is already started and has |
| 4717 | * enough credits) */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4718 | static ssize_t ext4_quota_write(struct super_block *sb, int type, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4719 | const char *data, size_t len, loff_t off) |
| 4720 | { |
| 4721 | struct inode *inode = sb_dqopt(sb)->files[type]; |
Aneesh Kumar K.V | 725d26d | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 4722 | ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4723 | int err = 0; |
| 4724 | int offset = off & (sb->s_blocksize - 1); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4725 | struct buffer_head *bh; |
| 4726 | handle_t *handle = journal_current_handle(); |
| 4727 | |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 4728 | if (EXT4_SB(sb)->s_journal && !handle) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 4729 | ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" |
| 4730 | " cancelled because transaction is not started", |
Jan Kara | 9c3013e | 2007-09-11 15:23:29 -0700 | [diff] [blame] | 4731 | (unsigned long long)off, (unsigned long long)len); |
| 4732 | return -EIO; |
| 4733 | } |
Dmitry Monakhov | 67eeb56 | 2010-03-02 08:08:51 -0500 | [diff] [blame] | 4734 | /* |
| 4735 | * Since we account only one data block in transaction credits, |
| 4736 | * then it is impossible to cross a block boundary. |
| 4737 | */ |
| 4738 | if (sb->s_blocksize - offset < len) { |
| 4739 | ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" |
| 4740 | " cancelled because not block aligned", |
| 4741 | (unsigned long long)off, (unsigned long long)len); |
| 4742 | return -EIO; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4743 | } |
Dmitry Monakhov | 67eeb56 | 2010-03-02 08:08:51 -0500 | [diff] [blame] | 4744 | |
| 4745 | mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA); |
| 4746 | bh = ext4_bread(handle, inode, blk, 1, &err); |
| 4747 | if (!bh) |
| 4748 | goto out; |
Jan Kara | 62d2b5f | 2010-07-27 11:56:07 -0400 | [diff] [blame] | 4749 | err = ext4_journal_get_write_access(handle, bh); |
| 4750 | if (err) { |
| 4751 | brelse(bh); |
| 4752 | goto out; |
Dmitry Monakhov | 67eeb56 | 2010-03-02 08:08:51 -0500 | [diff] [blame] | 4753 | } |
| 4754 | lock_buffer(bh); |
| 4755 | memcpy(bh->b_data+offset, data, len); |
| 4756 | flush_dcache_page(bh->b_page); |
| 4757 | unlock_buffer(bh); |
Jan Kara | 62d2b5f | 2010-07-27 11:56:07 -0400 | [diff] [blame] | 4758 | err = ext4_handle_dirty_metadata(handle, NULL, bh); |
Dmitry Monakhov | 67eeb56 | 2010-03-02 08:08:51 -0500 | [diff] [blame] | 4759 | brelse(bh); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4760 | out: |
Dmitry Monakhov | 67eeb56 | 2010-03-02 08:08:51 -0500 | [diff] [blame] | 4761 | if (err) { |
Jan Kara | 4d04e4f | 2008-07-04 09:59:34 -0700 | [diff] [blame] | 4762 | mutex_unlock(&inode->i_mutex); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4763 | return err; |
Jan Kara | 4d04e4f | 2008-07-04 09:59:34 -0700 | [diff] [blame] | 4764 | } |
Dmitry Monakhov | 67eeb56 | 2010-03-02 08:08:51 -0500 | [diff] [blame] | 4765 | if (inode->i_size < off + len) { |
| 4766 | i_size_write(inode, off + len); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4767 | EXT4_I(inode)->i_disksize = inode->i_size; |
Jan Kara | 21f9769 | 2011-04-04 15:33:39 -0400 | [diff] [blame] | 4768 | ext4_mark_inode_dirty(handle, inode); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4769 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4770 | mutex_unlock(&inode->i_mutex); |
Dmitry Monakhov | 67eeb56 | 2010-03-02 08:08:51 -0500 | [diff] [blame] | 4771 | return len; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4772 | } |
| 4773 | |
| 4774 | #endif |
| 4775 | |
Al Viro | 152a083 | 2010-07-25 00:46:55 +0400 | [diff] [blame] | 4776 | static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, |
| 4777 | const char *dev_name, void *data) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4778 | { |
Al Viro | 152a083 | 2010-07-25 00:46:55 +0400 | [diff] [blame] | 4779 | return mount_bdev(fs_type, flags, dev_name, data, ext4_fill_super); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4780 | } |
| 4781 | |
Theodore Ts'o | 37f328e | 2010-03-24 20:06:41 -0400 | [diff] [blame] | 4782 | #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) |
Theodore Ts'o | 24b5842 | 2009-12-07 14:08:51 -0500 | [diff] [blame] | 4783 | static inline void register_as_ext2(void) |
| 4784 | { |
| 4785 | int err = register_filesystem(&ext2_fs_type); |
| 4786 | if (err) |
| 4787 | printk(KERN_WARNING |
| 4788 | "EXT4-fs: Unable to register as ext2 (%d)\n", err); |
| 4789 | } |
| 4790 | |
| 4791 | static inline void unregister_as_ext2(void) |
| 4792 | { |
| 4793 | unregister_filesystem(&ext2_fs_type); |
| 4794 | } |
Theodore Ts'o | 2035e77 | 2011-04-18 17:29:14 -0400 | [diff] [blame] | 4795 | |
| 4796 | static inline int ext2_feature_set_ok(struct super_block *sb) |
| 4797 | { |
| 4798 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT2_FEATURE_INCOMPAT_SUPP)) |
| 4799 | return 0; |
| 4800 | if (sb->s_flags & MS_RDONLY) |
| 4801 | return 1; |
| 4802 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT2_FEATURE_RO_COMPAT_SUPP)) |
| 4803 | return 0; |
| 4804 | return 1; |
| 4805 | } |
Theodore Ts'o | 51b7e3c | 2009-12-21 10:56:09 -0500 | [diff] [blame] | 4806 | MODULE_ALIAS("ext2"); |
Theodore Ts'o | 24b5842 | 2009-12-07 14:08:51 -0500 | [diff] [blame] | 4807 | #else |
| 4808 | static inline void register_as_ext2(void) { } |
| 4809 | static inline void unregister_as_ext2(void) { } |
Theodore Ts'o | 2035e77 | 2011-04-18 17:29:14 -0400 | [diff] [blame] | 4810 | 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] | 4811 | #endif |
| 4812 | |
Theodore Ts'o | 37f328e | 2010-03-24 20:06:41 -0400 | [diff] [blame] | 4813 | #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) |
Theodore Ts'o | 24b5842 | 2009-12-07 14:08:51 -0500 | [diff] [blame] | 4814 | static inline void register_as_ext3(void) |
| 4815 | { |
| 4816 | int err = register_filesystem(&ext3_fs_type); |
| 4817 | if (err) |
| 4818 | printk(KERN_WARNING |
| 4819 | "EXT4-fs: Unable to register as ext3 (%d)\n", err); |
| 4820 | } |
| 4821 | |
| 4822 | static inline void unregister_as_ext3(void) |
| 4823 | { |
| 4824 | unregister_filesystem(&ext3_fs_type); |
| 4825 | } |
Theodore Ts'o | 2035e77 | 2011-04-18 17:29:14 -0400 | [diff] [blame] | 4826 | |
| 4827 | static inline int ext3_feature_set_ok(struct super_block *sb) |
| 4828 | { |
| 4829 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT3_FEATURE_INCOMPAT_SUPP)) |
| 4830 | return 0; |
| 4831 | if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) |
| 4832 | return 0; |
| 4833 | if (sb->s_flags & MS_RDONLY) |
| 4834 | return 1; |
| 4835 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT3_FEATURE_RO_COMPAT_SUPP)) |
| 4836 | return 0; |
| 4837 | return 1; |
| 4838 | } |
Theodore Ts'o | 51b7e3c | 2009-12-21 10:56:09 -0500 | [diff] [blame] | 4839 | MODULE_ALIAS("ext3"); |
Theodore Ts'o | 24b5842 | 2009-12-07 14:08:51 -0500 | [diff] [blame] | 4840 | #else |
| 4841 | static inline void register_as_ext3(void) { } |
| 4842 | static inline void unregister_as_ext3(void) { } |
Theodore Ts'o | 2035e77 | 2011-04-18 17:29:14 -0400 | [diff] [blame] | 4843 | static inline int ext3_feature_set_ok(struct super_block *sb) { return 0; } |
Theodore Ts'o | 24b5842 | 2009-12-07 14:08:51 -0500 | [diff] [blame] | 4844 | #endif |
| 4845 | |
Theodore Ts'o | 03010a3 | 2008-10-10 20:02:48 -0400 | [diff] [blame] | 4846 | static struct file_system_type ext4_fs_type = { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4847 | .owner = THIS_MODULE, |
Theodore Ts'o | 03010a3 | 2008-10-10 20:02:48 -0400 | [diff] [blame] | 4848 | .name = "ext4", |
Al Viro | 152a083 | 2010-07-25 00:46:55 +0400 | [diff] [blame] | 4849 | .mount = ext4_mount, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4850 | .kill_sb = kill_block_super, |
| 4851 | .fs_flags = FS_REQUIRES_DEV, |
| 4852 | }; |
| 4853 | |
Lukas Czerner | 8f02122 | 2011-02-03 14:33:33 -0500 | [diff] [blame] | 4854 | static int __init ext4_init_feat_adverts(void) |
Lukas Czerner | 857ac88 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 4855 | { |
| 4856 | struct ext4_features *ef; |
| 4857 | int ret = -ENOMEM; |
| 4858 | |
| 4859 | ef = kzalloc(sizeof(struct ext4_features), GFP_KERNEL); |
| 4860 | if (!ef) |
| 4861 | goto out; |
| 4862 | |
| 4863 | ef->f_kobj.kset = ext4_kset; |
| 4864 | init_completion(&ef->f_kobj_unregister); |
| 4865 | ret = kobject_init_and_add(&ef->f_kobj, &ext4_feat_ktype, NULL, |
| 4866 | "features"); |
| 4867 | if (ret) { |
| 4868 | kfree(ef); |
| 4869 | goto out; |
| 4870 | } |
| 4871 | |
| 4872 | ext4_feat = ef; |
| 4873 | ret = 0; |
| 4874 | out: |
| 4875 | return ret; |
| 4876 | } |
| 4877 | |
Lukas Czerner | 8f02122 | 2011-02-03 14:33:33 -0500 | [diff] [blame] | 4878 | static void ext4_exit_feat_adverts(void) |
| 4879 | { |
| 4880 | kobject_put(&ext4_feat->f_kobj); |
| 4881 | wait_for_completion(&ext4_feat->f_kobj_unregister); |
| 4882 | kfree(ext4_feat); |
| 4883 | } |
| 4884 | |
Eric Sandeen | e9e3bce | 2011-02-12 08:17:34 -0500 | [diff] [blame] | 4885 | /* Shared across all ext4 file systems */ |
| 4886 | wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; |
| 4887 | struct mutex ext4__aio_mutex[EXT4_WQ_HASH_SZ]; |
| 4888 | |
Theodore Ts'o | 5dabfc7 | 2010-10-27 21:30:14 -0400 | [diff] [blame] | 4889 | static int __init ext4_init_fs(void) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4890 | { |
Eric Sandeen | e9e3bce | 2011-02-12 08:17:34 -0500 | [diff] [blame] | 4891 | int i, err; |
Alex Tomas | c9de560 | 2008-01-29 00:19:52 -0500 | [diff] [blame] | 4892 | |
Al Viro | 07c0c5d8 | 2012-03-20 22:05:02 -0400 | [diff] [blame] | 4893 | ext4_li_info = NULL; |
| 4894 | mutex_init(&ext4_li_mtx); |
| 4895 | |
Dmitry Monakhov | 12e9b89 | 2010-05-16 22:00:00 -0400 | [diff] [blame] | 4896 | ext4_check_flag_values(); |
Eric Sandeen | e9e3bce | 2011-02-12 08:17:34 -0500 | [diff] [blame] | 4897 | |
| 4898 | for (i = 0; i < EXT4_WQ_HASH_SZ; i++) { |
| 4899 | mutex_init(&ext4__aio_mutex[i]); |
| 4900 | init_waitqueue_head(&ext4__ioend_wq[i]); |
| 4901 | } |
| 4902 | |
Theodore Ts'o | 5dabfc7 | 2010-10-27 21:30:14 -0400 | [diff] [blame] | 4903 | err = ext4_init_pageio(); |
Theodore Ts'o | 6fd058f | 2009-05-17 15:38:01 -0400 | [diff] [blame] | 4904 | if (err) |
| 4905 | return err; |
Theodore Ts'o | 5dabfc7 | 2010-10-27 21:30:14 -0400 | [diff] [blame] | 4906 | err = ext4_init_system_zone(); |
Theodore Ts'o | bd2d021 | 2010-10-27 21:30:10 -0400 | [diff] [blame] | 4907 | if (err) |
Fabrice Jouhaud | d44651d | 2011-10-08 16:26:03 -0400 | [diff] [blame] | 4908 | goto out6; |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 4909 | ext4_kset = kset_create_and_add("ext4", NULL, fs_kobj); |
| 4910 | if (!ext4_kset) |
Theodore Ts'o | dd68314 | 2011-02-03 14:33:49 -0500 | [diff] [blame] | 4911 | goto out5; |
Fabrice Jouhaud | d44651d | 2011-10-08 16:26:03 -0400 | [diff] [blame] | 4912 | ext4_proc_root = proc_mkdir("fs/ext4", NULL); |
Lukas Czerner | 857ac88 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 4913 | |
| 4914 | err = ext4_init_feat_adverts(); |
Theodore Ts'o | dd68314 | 2011-02-03 14:33:49 -0500 | [diff] [blame] | 4915 | if (err) |
| 4916 | goto out4; |
Lukas Czerner | 857ac88 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 4917 | |
Theodore Ts'o | 5dabfc7 | 2010-10-27 21:30:14 -0400 | [diff] [blame] | 4918 | err = ext4_init_mballoc(); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4919 | if (err) |
Theodore Ts'o | 6fd058f | 2009-05-17 15:38:01 -0400 | [diff] [blame] | 4920 | goto out3; |
Alex Tomas | c9de560 | 2008-01-29 00:19:52 -0500 | [diff] [blame] | 4921 | |
Theodore Ts'o | 5dabfc7 | 2010-10-27 21:30:14 -0400 | [diff] [blame] | 4922 | err = ext4_init_xattr(); |
Alex Tomas | c9de560 | 2008-01-29 00:19:52 -0500 | [diff] [blame] | 4923 | if (err) |
| 4924 | goto out2; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4925 | err = init_inodecache(); |
| 4926 | if (err) |
| 4927 | goto out1; |
Theodore Ts'o | 24b5842 | 2009-12-07 14:08:51 -0500 | [diff] [blame] | 4928 | register_as_ext3(); |
Theodore Ts'o | 2035e77 | 2011-04-18 17:29:14 -0400 | [diff] [blame] | 4929 | register_as_ext2(); |
Theodore Ts'o | 03010a3 | 2008-10-10 20:02:48 -0400 | [diff] [blame] | 4930 | err = register_filesystem(&ext4_fs_type); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4931 | if (err) |
| 4932 | goto out; |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 4933 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4934 | return 0; |
| 4935 | out: |
Theodore Ts'o | 24b5842 | 2009-12-07 14:08:51 -0500 | [diff] [blame] | 4936 | unregister_as_ext2(); |
| 4937 | unregister_as_ext3(); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4938 | destroy_inodecache(); |
| 4939 | out1: |
Theodore Ts'o | 5dabfc7 | 2010-10-27 21:30:14 -0400 | [diff] [blame] | 4940 | ext4_exit_xattr(); |
Alex Tomas | c9de560 | 2008-01-29 00:19:52 -0500 | [diff] [blame] | 4941 | out2: |
Theodore Ts'o | 5dabfc7 | 2010-10-27 21:30:14 -0400 | [diff] [blame] | 4942 | ext4_exit_mballoc(); |
Theodore Ts'o | 6fd058f | 2009-05-17 15:38:01 -0400 | [diff] [blame] | 4943 | out3: |
Lukas Czerner | 8f02122 | 2011-02-03 14:33:33 -0500 | [diff] [blame] | 4944 | ext4_exit_feat_adverts(); |
Theodore Ts'o | 6fd058f | 2009-05-17 15:38:01 -0400 | [diff] [blame] | 4945 | out4: |
Fabrice Jouhaud | d44651d | 2011-10-08 16:26:03 -0400 | [diff] [blame] | 4946 | if (ext4_proc_root) |
| 4947 | remove_proc_entry("fs/ext4", NULL); |
Theodore Ts'o | dd68314 | 2011-02-03 14:33:49 -0500 | [diff] [blame] | 4948 | kset_unregister(ext4_kset); |
Fabrice Jouhaud | d44651d | 2011-10-08 16:26:03 -0400 | [diff] [blame] | 4949 | out5: |
Theodore Ts'o | dd68314 | 2011-02-03 14:33:49 -0500 | [diff] [blame] | 4950 | ext4_exit_system_zone(); |
Fabrice Jouhaud | d44651d | 2011-10-08 16:26:03 -0400 | [diff] [blame] | 4951 | out6: |
Theodore Ts'o | 5dabfc7 | 2010-10-27 21:30:14 -0400 | [diff] [blame] | 4952 | ext4_exit_pageio(); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4953 | return err; |
| 4954 | } |
| 4955 | |
Theodore Ts'o | 5dabfc7 | 2010-10-27 21:30:14 -0400 | [diff] [blame] | 4956 | static void __exit ext4_exit_fs(void) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4957 | { |
Lukas Czerner | bfff687 | 2010-10-27 21:30:05 -0400 | [diff] [blame] | 4958 | ext4_destroy_lazyinit_thread(); |
Theodore Ts'o | 24b5842 | 2009-12-07 14:08:51 -0500 | [diff] [blame] | 4959 | unregister_as_ext2(); |
| 4960 | unregister_as_ext3(); |
Theodore Ts'o | 03010a3 | 2008-10-10 20:02:48 -0400 | [diff] [blame] | 4961 | unregister_filesystem(&ext4_fs_type); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4962 | destroy_inodecache(); |
Theodore Ts'o | 5dabfc7 | 2010-10-27 21:30:14 -0400 | [diff] [blame] | 4963 | ext4_exit_xattr(); |
| 4964 | ext4_exit_mballoc(); |
Lukas Czerner | 8f02122 | 2011-02-03 14:33:33 -0500 | [diff] [blame] | 4965 | ext4_exit_feat_adverts(); |
Theodore Ts'o | 9f6200b | 2008-09-23 09:18:24 -0400 | [diff] [blame] | 4966 | remove_proc_entry("fs/ext4", NULL); |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 4967 | kset_unregister(ext4_kset); |
Theodore Ts'o | 5dabfc7 | 2010-10-27 21:30:14 -0400 | [diff] [blame] | 4968 | ext4_exit_system_zone(); |
| 4969 | ext4_exit_pageio(); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4970 | } |
| 4971 | |
| 4972 | 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] | 4973 | MODULE_DESCRIPTION("Fourth Extended Filesystem"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4974 | MODULE_LICENSE("GPL"); |
Theodore Ts'o | 5dabfc7 | 2010-10-27 21:30:14 -0400 | [diff] [blame] | 4975 | module_init(ext4_init_fs) |
| 4976 | module_exit(ext4_exit_fs) |