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> |
| 29 | #include <linux/smp_lock.h> |
| 30 | #include <linux/buffer_head.h> |
Christoph Hellwig | a569425 | 2007-07-17 04:04:28 -0700 | [diff] [blame] | 31 | #include <linux/exportfs.h> |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 32 | #include <linux/vfs.h> |
| 33 | #include <linux/random.h> |
| 34 | #include <linux/mount.h> |
| 35 | #include <linux/namei.h> |
| 36 | #include <linux/quotaops.h> |
| 37 | #include <linux/seq_file.h> |
Theodore Ts'o | 9f6200b | 2008-09-23 09:18:24 -0400 | [diff] [blame] | 38 | #include <linux/proc_fs.h> |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 39 | #include <linux/ctype.h> |
Vignesh Babu | 1330593 | 2007-07-18 09:11:02 -0400 | [diff] [blame] | 40 | #include <linux/log2.h> |
Andreas Dilger | 717d50e | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 41 | #include <linux/crc16.h> |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 42 | #include <asm/uaccess.h> |
| 43 | |
Christoph Hellwig | 3dcf545 | 2008-04-29 18:13:32 -0400 | [diff] [blame] | 44 | #include "ext4.h" |
| 45 | #include "ext4_jbd2.h" |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 46 | #include "xattr.h" |
| 47 | #include "acl.h" |
Theodore Ts'o | 3661d28 | 2009-09-14 22:59:50 -0400 | [diff] [blame] | 48 | #include "mballoc.h" |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 49 | |
Theodore Ts'o | 9bffad1 | 2009-06-17 11:48:11 -0400 | [diff] [blame] | 50 | #define CREATE_TRACE_POINTS |
| 51 | #include <trace/events/ext4.h> |
| 52 | |
Theodore Ts'o | 9f6200b | 2008-09-23 09:18:24 -0400 | [diff] [blame] | 53 | struct proc_dir_entry *ext4_proc_root; |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 54 | static struct kset *ext4_kset; |
Theodore Ts'o | 9f6200b | 2008-09-23 09:18:24 -0400 | [diff] [blame] | 55 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 56 | static int ext4_load_journal(struct super_block *, struct ext4_super_block *, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 57 | unsigned long journal_devnum); |
Theodore Ts'o | e2d6705 | 2009-05-01 00:33:44 -0400 | [diff] [blame] | 58 | static int ext4_commit_super(struct super_block *sb, int sync); |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 59 | static void ext4_mark_recovery_complete(struct super_block *sb, |
| 60 | struct ext4_super_block *es); |
| 61 | static void ext4_clear_journal_err(struct super_block *sb, |
| 62 | struct ext4_super_block *es); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 63 | static int ext4_sync_fs(struct super_block *sb, int wait); |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 64 | static const char *ext4_decode_error(struct super_block *sb, int errno, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 65 | char nbuf[16]); |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 66 | static int ext4_remount(struct super_block *sb, int *flags, char *data); |
| 67 | static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); |
Takashi Sato | c4be0c1 | 2009-01-09 16:40:58 -0800 | [diff] [blame] | 68 | static int ext4_unfreeze(struct super_block *sb); |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 69 | static void ext4_write_super(struct super_block *sb); |
Takashi Sato | c4be0c1 | 2009-01-09 16:40:58 -0800 | [diff] [blame] | 70 | static int ext4_freeze(struct super_block *sb); |
Jan Kara | ba69f9a | 2010-03-24 20:18:37 -0400 | [diff] [blame] | 71 | static int ext4_get_sb(struct file_system_type *fs_type, int flags, |
| 72 | const char *dev_name, void *data, struct vfsmount *mnt); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 73 | |
Jan Kara | ba69f9a | 2010-03-24 20:18:37 -0400 | [diff] [blame] | 74 | #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) |
| 75 | static struct file_system_type ext3_fs_type = { |
| 76 | .owner = THIS_MODULE, |
| 77 | .name = "ext3", |
| 78 | .get_sb = ext4_get_sb, |
| 79 | .kill_sb = kill_block_super, |
| 80 | .fs_flags = FS_REQUIRES_DEV, |
| 81 | }; |
| 82 | #define IS_EXT3_SB(sb) ((sb)->s_bdev->bd_holder == &ext3_fs_type) |
| 83 | #else |
| 84 | #define IS_EXT3_SB(sb) (0) |
| 85 | #endif |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 86 | |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 87 | ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, |
| 88 | struct ext4_group_desc *bg) |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 89 | { |
Aneesh Kumar K.V | 3a14589 | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 90 | return le32_to_cpu(bg->bg_block_bitmap_lo) | |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 91 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 92 | (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] | 93 | } |
| 94 | |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 95 | ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, |
| 96 | struct ext4_group_desc *bg) |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 97 | { |
Aneesh Kumar K.V | 5272f83 | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 98 | return le32_to_cpu(bg->bg_inode_bitmap_lo) | |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 99 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 100 | (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] | 101 | } |
| 102 | |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 103 | ext4_fsblk_t ext4_inode_table(struct super_block *sb, |
| 104 | struct ext4_group_desc *bg) |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 105 | { |
Aneesh Kumar K.V | 5272f83 | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 106 | return le32_to_cpu(bg->bg_inode_table_lo) | |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 107 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 108 | (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] | 109 | } |
| 110 | |
Aneesh Kumar K.V | 560671a | 2009-01-05 22:20:24 -0500 | [diff] [blame] | 111 | __u32 ext4_free_blks_count(struct super_block *sb, |
| 112 | struct ext4_group_desc *bg) |
| 113 | { |
| 114 | return le16_to_cpu(bg->bg_free_blocks_count_lo) | |
| 115 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 116 | (__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] | 117 | } |
| 118 | |
| 119 | __u32 ext4_free_inodes_count(struct super_block *sb, |
| 120 | struct ext4_group_desc *bg) |
| 121 | { |
| 122 | return le16_to_cpu(bg->bg_free_inodes_count_lo) | |
| 123 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 124 | (__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] | 125 | } |
| 126 | |
| 127 | __u32 ext4_used_dirs_count(struct super_block *sb, |
| 128 | struct ext4_group_desc *bg) |
| 129 | { |
| 130 | return le16_to_cpu(bg->bg_used_dirs_count_lo) | |
| 131 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 132 | (__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] | 133 | } |
| 134 | |
| 135 | __u32 ext4_itable_unused_count(struct super_block *sb, |
| 136 | struct ext4_group_desc *bg) |
| 137 | { |
| 138 | return le16_to_cpu(bg->bg_itable_unused_lo) | |
| 139 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 140 | (__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] | 141 | } |
| 142 | |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 143 | void ext4_block_bitmap_set(struct super_block *sb, |
| 144 | struct ext4_group_desc *bg, ext4_fsblk_t blk) |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 145 | { |
Aneesh Kumar K.V | 3a14589 | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 146 | bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 147 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
| 148 | bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 149 | } |
| 150 | |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 151 | void ext4_inode_bitmap_set(struct super_block *sb, |
| 152 | struct ext4_group_desc *bg, ext4_fsblk_t blk) |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 153 | { |
Aneesh Kumar K.V | 5272f83 | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 154 | bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 155 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
| 156 | bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 157 | } |
| 158 | |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 159 | void ext4_inode_table_set(struct super_block *sb, |
| 160 | struct ext4_group_desc *bg, ext4_fsblk_t blk) |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 161 | { |
Aneesh Kumar K.V | 5272f83 | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 162 | bg->bg_inode_table_lo = cpu_to_le32((u32)blk); |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 163 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
| 164 | bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 165 | } |
| 166 | |
Aneesh Kumar K.V | 560671a | 2009-01-05 22:20:24 -0500 | [diff] [blame] | 167 | void ext4_free_blks_set(struct super_block *sb, |
| 168 | struct ext4_group_desc *bg, __u32 count) |
| 169 | { |
| 170 | bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); |
| 171 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
| 172 | bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); |
| 173 | } |
| 174 | |
| 175 | void ext4_free_inodes_set(struct super_block *sb, |
| 176 | struct ext4_group_desc *bg, __u32 count) |
| 177 | { |
| 178 | bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); |
| 179 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
| 180 | bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); |
| 181 | } |
| 182 | |
| 183 | void ext4_used_dirs_set(struct super_block *sb, |
| 184 | struct ext4_group_desc *bg, __u32 count) |
| 185 | { |
| 186 | bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); |
| 187 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
| 188 | bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); |
| 189 | } |
| 190 | |
| 191 | void ext4_itable_unused_set(struct super_block *sb, |
| 192 | struct ext4_group_desc *bg, __u32 count) |
| 193 | { |
| 194 | bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); |
| 195 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
| 196 | bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); |
| 197 | } |
| 198 | |
Curt Wohlgemuth | d3d1faf | 2009-09-29 11:01:03 -0400 | [diff] [blame] | 199 | |
| 200 | /* Just increment the non-pointer handle value */ |
| 201 | static handle_t *ext4_get_nojournal(void) |
| 202 | { |
| 203 | handle_t *handle = current->journal_info; |
| 204 | unsigned long ref_cnt = (unsigned long)handle; |
| 205 | |
| 206 | BUG_ON(ref_cnt >= EXT4_NOJOURNAL_MAX_REF_COUNT); |
| 207 | |
| 208 | ref_cnt++; |
| 209 | handle = (handle_t *)ref_cnt; |
| 210 | |
| 211 | current->journal_info = handle; |
| 212 | return handle; |
| 213 | } |
| 214 | |
| 215 | |
| 216 | /* Decrement the non-pointer handle value */ |
| 217 | static void ext4_put_nojournal(handle_t *handle) |
| 218 | { |
| 219 | unsigned long ref_cnt = (unsigned long)handle; |
| 220 | |
| 221 | BUG_ON(ref_cnt == 0); |
| 222 | |
| 223 | ref_cnt--; |
| 224 | handle = (handle_t *)ref_cnt; |
| 225 | |
| 226 | current->journal_info = handle; |
| 227 | } |
| 228 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 229 | /* |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 230 | * Wrappers for jbd2_journal_start/end. |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 231 | * |
| 232 | * The only special thing we need to do here is to make sure that all |
| 233 | * journal_end calls result in the superblock being marked dirty, so |
| 234 | * that sync() will call the filesystem's write_super callback if |
| 235 | * appropriate. |
| 236 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 237 | handle_t *ext4_journal_start_sb(struct super_block *sb, int nblocks) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 238 | { |
| 239 | journal_t *journal; |
| 240 | |
| 241 | if (sb->s_flags & MS_RDONLY) |
| 242 | return ERR_PTR(-EROFS); |
| 243 | |
Eric Sandeen | 437f88c | 2010-08-01 17:33:29 -0400 | [diff] [blame] | 244 | vfs_check_frozen(sb, SB_FREEZE_TRANS); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 245 | /* Special case here: if the journal has aborted behind our |
| 246 | * backs (eg. EIO in the commit thread), then we still need to |
| 247 | * take the FS itself readonly cleanly. */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 248 | journal = EXT4_SB(sb)->s_journal; |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 249 | if (journal) { |
| 250 | if (is_journal_aborted(journal)) { |
Theodore Ts'o | c67d859 | 2010-06-29 11:07:07 -0400 | [diff] [blame] | 251 | ext4_abort(sb, "Detected aborted journal"); |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 252 | return ERR_PTR(-EROFS); |
| 253 | } |
| 254 | return jbd2_journal_start(journal, nblocks); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 255 | } |
Curt Wohlgemuth | d3d1faf | 2009-09-29 11:01:03 -0400 | [diff] [blame] | 256 | return ext4_get_nojournal(); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 257 | } |
| 258 | |
| 259 | /* |
| 260 | * 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] | 261 | * jbd2_journal_stop calls result in the superblock being marked dirty, so |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 262 | * that sync() will call the filesystem's write_super callback if |
| 263 | * appropriate. |
| 264 | */ |
Theodore Ts'o | c398eda | 2010-07-27 11:56:40 -0400 | [diff] [blame] | 265 | 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] | 266 | { |
| 267 | struct super_block *sb; |
| 268 | int err; |
| 269 | int rc; |
| 270 | |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 271 | if (!ext4_handle_valid(handle)) { |
Curt Wohlgemuth | d3d1faf | 2009-09-29 11:01:03 -0400 | [diff] [blame] | 272 | ext4_put_nojournal(handle); |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 273 | return 0; |
| 274 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 275 | sb = handle->h_transaction->t_journal->j_private; |
| 276 | err = handle->h_err; |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 277 | rc = jbd2_journal_stop(handle); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 278 | |
| 279 | if (!err) |
| 280 | err = rc; |
| 281 | if (err) |
Theodore Ts'o | c398eda | 2010-07-27 11:56:40 -0400 | [diff] [blame] | 282 | __ext4_std_error(sb, where, line, err); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 283 | return err; |
| 284 | } |
| 285 | |
Theodore Ts'o | 90c7201 | 2010-06-29 14:53:24 -0400 | [diff] [blame] | 286 | void ext4_journal_abort_handle(const char *caller, unsigned int line, |
| 287 | const char *err_fn, struct buffer_head *bh, |
| 288 | handle_t *handle, int err) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 289 | { |
| 290 | char nbuf[16]; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 291 | const char *errstr = ext4_decode_error(NULL, err, nbuf); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 292 | |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 293 | BUG_ON(!ext4_handle_valid(handle)); |
| 294 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 295 | if (bh) |
| 296 | BUFFER_TRACE(bh, "abort"); |
| 297 | |
| 298 | if (!handle->h_err) |
| 299 | handle->h_err = err; |
| 300 | |
| 301 | if (is_handle_aborted(handle)) |
| 302 | return; |
| 303 | |
Theodore Ts'o | 90c7201 | 2010-06-29 14:53:24 -0400 | [diff] [blame] | 304 | printk(KERN_ERR "%s:%d: aborting transaction: %s in %s\n", |
| 305 | caller, line, errstr, err_fn); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 306 | |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 307 | jbd2_journal_abort_handle(handle); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 308 | } |
| 309 | |
Theodore Ts'o | 1c13d5c | 2010-07-27 11:56:03 -0400 | [diff] [blame] | 310 | static void __save_error_info(struct super_block *sb, const char *func, |
| 311 | unsigned int line) |
| 312 | { |
| 313 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
| 314 | |
| 315 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; |
| 316 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); |
| 317 | es->s_last_error_time = cpu_to_le32(get_seconds()); |
| 318 | strncpy(es->s_last_error_func, func, sizeof(es->s_last_error_func)); |
| 319 | es->s_last_error_line = cpu_to_le32(line); |
| 320 | if (!es->s_first_error_time) { |
| 321 | es->s_first_error_time = es->s_last_error_time; |
| 322 | strncpy(es->s_first_error_func, func, |
| 323 | sizeof(es->s_first_error_func)); |
| 324 | es->s_first_error_line = cpu_to_le32(line); |
| 325 | es->s_first_error_ino = es->s_last_error_ino; |
| 326 | es->s_first_error_block = es->s_last_error_block; |
| 327 | } |
Theodore Ts'o | 66e61a9 | 2010-07-27 11:56:04 -0400 | [diff] [blame] | 328 | /* |
| 329 | * Start the daily error reporting function if it hasn't been |
| 330 | * started already |
| 331 | */ |
| 332 | if (!es->s_error_count) |
| 333 | 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] | 334 | es->s_error_count = cpu_to_le32(le32_to_cpu(es->s_error_count) + 1); |
| 335 | } |
| 336 | |
| 337 | static void save_error_info(struct super_block *sb, const char *func, |
| 338 | unsigned int line) |
| 339 | { |
| 340 | __save_error_info(sb, func, line); |
| 341 | ext4_commit_super(sb, 1); |
| 342 | } |
| 343 | |
| 344 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 345 | /* Deal with the reporting of failure conditions on a filesystem such as |
| 346 | * inconsistencies detected or read IO failures. |
| 347 | * |
| 348 | * 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] | 349 | * superblock. That is not possible on ext4, because we may have other |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 350 | * write ordering constraints on the superblock which prevent us from |
| 351 | * writing it out straight away; and given that the journal is about to |
| 352 | * be aborted, we can't rely on the current, or future, transactions to |
| 353 | * write out the superblock safely. |
| 354 | * |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 355 | * 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] | 356 | * the journal instead. On recovery, the journal will complain about |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 357 | * that error until we've noted it down and cleared it. |
| 358 | */ |
| 359 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 360 | static void ext4_handle_error(struct super_block *sb) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 361 | { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 362 | if (sb->s_flags & MS_RDONLY) |
| 363 | return; |
| 364 | |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 365 | if (!test_opt(sb, ERRORS_CONT)) { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 366 | journal_t *journal = EXT4_SB(sb)->s_journal; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 367 | |
Theodore Ts'o | 4ab2f15 | 2009-06-13 10:09:36 -0400 | [diff] [blame] | 368 | EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 369 | if (journal) |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 370 | jbd2_journal_abort(journal, -EIO); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 371 | } |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 372 | if (test_opt(sb, ERRORS_RO)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 373 | ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 374 | sb->s_flags |= MS_RDONLY; |
| 375 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 376 | if (test_opt(sb, ERRORS_PANIC)) |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 377 | panic("EXT4-fs (device %s): panic forced after error\n", |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 378 | sb->s_id); |
| 379 | } |
| 380 | |
Eric Sandeen | 12062dd | 2010-02-15 14:19:27 -0500 | [diff] [blame] | 381 | void __ext4_error(struct super_block *sb, const char *function, |
Theodore Ts'o | c398eda | 2010-07-27 11:56:40 -0400 | [diff] [blame] | 382 | unsigned int line, const char *fmt, ...) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 383 | { |
| 384 | va_list args; |
| 385 | |
| 386 | va_start(args, fmt); |
Theodore Ts'o | c398eda | 2010-07-27 11:56:40 -0400 | [diff] [blame] | 387 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: comm %s: ", |
| 388 | sb->s_id, function, line, current->comm); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 389 | vprintk(fmt, args); |
| 390 | printk("\n"); |
| 391 | va_end(args); |
| 392 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 393 | ext4_handle_error(sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 394 | } |
| 395 | |
Theodore Ts'o | c398eda | 2010-07-27 11:56:40 -0400 | [diff] [blame] | 396 | void ext4_error_inode(struct inode *inode, const char *function, |
| 397 | unsigned int line, ext4_fsblk_t block, |
Frank Mayhar | 273df55 | 2010-03-02 11:46:09 -0500 | [diff] [blame] | 398 | const char *fmt, ...) |
| 399 | { |
| 400 | va_list args; |
Theodore Ts'o | 1c13d5c | 2010-07-27 11:56:03 -0400 | [diff] [blame] | 401 | struct ext4_super_block *es = EXT4_SB(inode->i_sb)->s_es; |
Frank Mayhar | 273df55 | 2010-03-02 11:46:09 -0500 | [diff] [blame] | 402 | |
Theodore Ts'o | 1c13d5c | 2010-07-27 11:56:03 -0400 | [diff] [blame] | 403 | es->s_last_error_ino = cpu_to_le32(inode->i_ino); |
| 404 | es->s_last_error_block = cpu_to_le64(block); |
| 405 | save_error_info(inode->i_sb, function, line); |
Frank Mayhar | 273df55 | 2010-03-02 11:46:09 -0500 | [diff] [blame] | 406 | va_start(args, fmt); |
Theodore Ts'o | c398eda | 2010-07-27 11:56:40 -0400 | [diff] [blame] | 407 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: inode #%lu: ", |
| 408 | inode->i_sb->s_id, function, line, inode->i_ino); |
| 409 | if (block) |
| 410 | printk("block %llu: ", block); |
| 411 | printk("comm %s: ", current->comm); |
Frank Mayhar | 273df55 | 2010-03-02 11:46:09 -0500 | [diff] [blame] | 412 | vprintk(fmt, args); |
| 413 | printk("\n"); |
| 414 | va_end(args); |
| 415 | |
| 416 | ext4_handle_error(inode->i_sb); |
| 417 | } |
| 418 | |
Theodore Ts'o | c398eda | 2010-07-27 11:56:40 -0400 | [diff] [blame] | 419 | void ext4_error_file(struct file *file, const char *function, |
| 420 | unsigned int line, const char *fmt, ...) |
Frank Mayhar | 273df55 | 2010-03-02 11:46:09 -0500 | [diff] [blame] | 421 | { |
| 422 | va_list args; |
Theodore Ts'o | 1c13d5c | 2010-07-27 11:56:03 -0400 | [diff] [blame] | 423 | struct ext4_super_block *es; |
Frank Mayhar | 273df55 | 2010-03-02 11:46:09 -0500 | [diff] [blame] | 424 | struct inode *inode = file->f_dentry->d_inode; |
| 425 | char pathname[80], *path; |
| 426 | |
Theodore Ts'o | 1c13d5c | 2010-07-27 11:56:03 -0400 | [diff] [blame] | 427 | es = EXT4_SB(inode->i_sb)->s_es; |
| 428 | es->s_last_error_ino = cpu_to_le32(inode->i_ino); |
| 429 | save_error_info(inode->i_sb, function, line); |
Frank Mayhar | 273df55 | 2010-03-02 11:46:09 -0500 | [diff] [blame] | 430 | va_start(args, fmt); |
| 431 | path = d_path(&(file->f_path), pathname, sizeof(pathname)); |
| 432 | if (!path) |
| 433 | path = "(unknown)"; |
| 434 | printk(KERN_CRIT |
Theodore Ts'o | c398eda | 2010-07-27 11:56:40 -0400 | [diff] [blame] | 435 | "EXT4-fs error (device %s): %s:%d: inode #%lu " |
| 436 | "(comm %s path %s): ", |
| 437 | inode->i_sb->s_id, function, line, inode->i_ino, |
| 438 | current->comm, path); |
Frank Mayhar | 273df55 | 2010-03-02 11:46:09 -0500 | [diff] [blame] | 439 | vprintk(fmt, args); |
| 440 | printk("\n"); |
| 441 | va_end(args); |
| 442 | |
| 443 | ext4_handle_error(inode->i_sb); |
| 444 | } |
| 445 | |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 446 | static const char *ext4_decode_error(struct super_block *sb, int errno, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 447 | char nbuf[16]) |
| 448 | { |
| 449 | char *errstr = NULL; |
| 450 | |
| 451 | switch (errno) { |
| 452 | case -EIO: |
| 453 | errstr = "IO failure"; |
| 454 | break; |
| 455 | case -ENOMEM: |
| 456 | errstr = "Out of memory"; |
| 457 | break; |
| 458 | case -EROFS: |
Theodore Ts'o | 78f1ddb | 2009-07-27 23:09:47 -0400 | [diff] [blame] | 459 | if (!sb || (EXT4_SB(sb)->s_journal && |
| 460 | EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 461 | errstr = "Journal has aborted"; |
| 462 | else |
| 463 | errstr = "Readonly filesystem"; |
| 464 | break; |
| 465 | default: |
| 466 | /* If the caller passed in an extra buffer for unknown |
| 467 | * errors, textualise them now. Else we just return |
| 468 | * NULL. */ |
| 469 | if (nbuf) { |
| 470 | /* Check for truncated error codes... */ |
| 471 | if (snprintf(nbuf, 16, "error %d", -errno) >= 0) |
| 472 | errstr = nbuf; |
| 473 | } |
| 474 | break; |
| 475 | } |
| 476 | |
| 477 | return errstr; |
| 478 | } |
| 479 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 480 | /* __ext4_std_error decodes expected errors from journaling functions |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 481 | * automatically and invokes the appropriate error response. */ |
| 482 | |
Theodore Ts'o | c398eda | 2010-07-27 11:56:40 -0400 | [diff] [blame] | 483 | void __ext4_std_error(struct super_block *sb, const char *function, |
| 484 | unsigned int line, int errno) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 485 | { |
| 486 | char nbuf[16]; |
| 487 | const char *errstr; |
| 488 | |
| 489 | /* Special case: if the error is EROFS, and we're not already |
| 490 | * inside a transaction, then there's really no point in logging |
| 491 | * an error. */ |
| 492 | if (errno == -EROFS && journal_current_handle() == NULL && |
| 493 | (sb->s_flags & MS_RDONLY)) |
| 494 | return; |
| 495 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 496 | errstr = ext4_decode_error(sb, errno, nbuf); |
Theodore Ts'o | c398eda | 2010-07-27 11:56:40 -0400 | [diff] [blame] | 497 | printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n", |
| 498 | sb->s_id, function, line, errstr); |
Theodore Ts'o | 1c13d5c | 2010-07-27 11:56:03 -0400 | [diff] [blame] | 499 | save_error_info(sb, function, line); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 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 | |
| 504 | /* |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 505 | * ext4_abort is a much stronger failure handler than ext4_error. The |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 506 | * abort function may be used to deal with unrecoverable failures such |
| 507 | * as journal IO errors or ENOMEM at a critical moment in log management. |
| 508 | * |
| 509 | * We unconditionally force the filesystem into an ABORT|READONLY state, |
| 510 | * unless the error response on the fs has been set to panic in which |
| 511 | * case we take the easy way out and panic immediately. |
| 512 | */ |
| 513 | |
Theodore Ts'o | c67d859 | 2010-06-29 11:07:07 -0400 | [diff] [blame] | 514 | void __ext4_abort(struct super_block *sb, const char *function, |
Theodore Ts'o | c398eda | 2010-07-27 11:56:40 -0400 | [diff] [blame] | 515 | unsigned int line, const char *fmt, ...) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 516 | { |
| 517 | va_list args; |
| 518 | |
Theodore Ts'o | 1c13d5c | 2010-07-27 11:56:03 -0400 | [diff] [blame] | 519 | save_error_info(sb, function, line); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 520 | va_start(args, fmt); |
Theodore Ts'o | c398eda | 2010-07-27 11:56:40 -0400 | [diff] [blame] | 521 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: ", sb->s_id, |
| 522 | function, line); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 523 | vprintk(fmt, args); |
| 524 | printk("\n"); |
| 525 | va_end(args); |
| 526 | |
Theodore Ts'o | 1c13d5c | 2010-07-27 11:56:03 -0400 | [diff] [blame] | 527 | if ((sb->s_flags & MS_RDONLY) == 0) { |
| 528 | ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); |
| 529 | sb->s_flags |= MS_RDONLY; |
| 530 | EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; |
| 531 | if (EXT4_SB(sb)->s_journal) |
| 532 | jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); |
| 533 | save_error_info(sb, function, line); |
| 534 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 535 | if (test_opt(sb, ERRORS_PANIC)) |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 536 | panic("EXT4-fs panic from previous error\n"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 537 | } |
| 538 | |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 539 | void ext4_msg (struct super_block * sb, const char *prefix, |
| 540 | const char *fmt, ...) |
| 541 | { |
| 542 | va_list args; |
| 543 | |
| 544 | va_start(args, fmt); |
| 545 | printk("%sEXT4-fs (%s): ", prefix, sb->s_id); |
| 546 | vprintk(fmt, args); |
| 547 | printk("\n"); |
| 548 | va_end(args); |
| 549 | } |
| 550 | |
Eric Sandeen | 12062dd | 2010-02-15 14:19:27 -0500 | [diff] [blame] | 551 | void __ext4_warning(struct super_block *sb, const char *function, |
Theodore Ts'o | c398eda | 2010-07-27 11:56:40 -0400 | [diff] [blame] | 552 | unsigned int line, const char *fmt, ...) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 553 | { |
| 554 | va_list args; |
| 555 | |
| 556 | va_start(args, fmt); |
Theodore Ts'o | c398eda | 2010-07-27 11:56:40 -0400 | [diff] [blame] | 557 | printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: ", |
| 558 | sb->s_id, function, line); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 559 | vprintk(fmt, args); |
| 560 | printk("\n"); |
| 561 | va_end(args); |
| 562 | } |
| 563 | |
Theodore Ts'o | e29136f | 2010-06-29 12:54:28 -0400 | [diff] [blame] | 564 | void __ext4_grp_locked_error(const char *function, unsigned int line, |
| 565 | struct super_block *sb, ext4_group_t grp, |
| 566 | unsigned long ino, ext4_fsblk_t block, |
| 567 | const char *fmt, ...) |
Aneesh Kumar K.V | 5d1b1b3 | 2009-01-05 22:19:52 -0500 | [diff] [blame] | 568 | __releases(bitlock) |
| 569 | __acquires(bitlock) |
| 570 | { |
| 571 | va_list args; |
| 572 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
| 573 | |
Theodore Ts'o | 1c13d5c | 2010-07-27 11:56:03 -0400 | [diff] [blame] | 574 | es->s_last_error_ino = cpu_to_le32(ino); |
| 575 | es->s_last_error_block = cpu_to_le64(block); |
| 576 | __save_error_info(sb, function, line); |
Aneesh Kumar K.V | 5d1b1b3 | 2009-01-05 22:19:52 -0500 | [diff] [blame] | 577 | va_start(args, fmt); |
Theodore Ts'o | e29136f | 2010-06-29 12:54:28 -0400 | [diff] [blame] | 578 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u", |
| 579 | sb->s_id, function, line, grp); |
| 580 | if (ino) |
| 581 | printk("inode %lu: ", ino); |
| 582 | if (block) |
| 583 | printk("block %llu:", (unsigned long long) block); |
Aneesh Kumar K.V | 5d1b1b3 | 2009-01-05 22:19:52 -0500 | [diff] [blame] | 584 | vprintk(fmt, args); |
| 585 | printk("\n"); |
| 586 | va_end(args); |
| 587 | |
| 588 | if (test_opt(sb, ERRORS_CONT)) { |
Theodore Ts'o | e2d6705 | 2009-05-01 00:33:44 -0400 | [diff] [blame] | 589 | ext4_commit_super(sb, 0); |
Aneesh Kumar K.V | 5d1b1b3 | 2009-01-05 22:19:52 -0500 | [diff] [blame] | 590 | return; |
| 591 | } |
Theodore Ts'o | 1c13d5c | 2010-07-27 11:56:03 -0400 | [diff] [blame] | 592 | |
Aneesh Kumar K.V | 5d1b1b3 | 2009-01-05 22:19:52 -0500 | [diff] [blame] | 593 | ext4_unlock_group(sb, grp); |
| 594 | ext4_handle_error(sb); |
| 595 | /* |
| 596 | * We only get here in the ERRORS_RO case; relocking the group |
| 597 | * may be dangerous, but nothing bad will happen since the |
| 598 | * filesystem will have already been marked read/only and the |
| 599 | * journal has been aborted. We return 1 as a hint to callers |
| 600 | * who might what to use the return value from |
| 601 | * ext4_grp_locked_error() to distinguish beween the |
| 602 | * ERRORS_CONT and ERRORS_RO case, and perhaps return more |
| 603 | * aggressively from the ext4 function in question, with a |
| 604 | * more appropriate error code. |
| 605 | */ |
| 606 | ext4_lock_group(sb, grp); |
| 607 | return; |
| 608 | } |
| 609 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 610 | void ext4_update_dynamic_rev(struct super_block *sb) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 611 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 612 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 613 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 614 | if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 615 | return; |
| 616 | |
Eric Sandeen | 12062dd | 2010-02-15 14:19:27 -0500 | [diff] [blame] | 617 | ext4_warning(sb, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 618 | "updating to rev %d because of new feature flag, " |
| 619 | "running e2fsck is recommended", |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 620 | EXT4_DYNAMIC_REV); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 621 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 622 | es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); |
| 623 | es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); |
| 624 | es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 625 | /* leave es->s_feature_*compat flags alone */ |
| 626 | /* es->s_uuid will be set by e2fsck if empty */ |
| 627 | |
| 628 | /* |
| 629 | * The rest of the superblock fields should be zero, and if not it |
| 630 | * means they are likely already in use, so leave them alone. We |
| 631 | * can leave it up to e2fsck to clean up any inconsistencies there. |
| 632 | */ |
| 633 | } |
| 634 | |
| 635 | /* |
| 636 | * Open the external journal device |
| 637 | */ |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 638 | 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] | 639 | { |
| 640 | struct block_device *bdev; |
| 641 | char b[BDEVNAME_SIZE]; |
| 642 | |
| 643 | bdev = open_by_devnum(dev, FMODE_READ|FMODE_WRITE); |
| 644 | if (IS_ERR(bdev)) |
| 645 | goto fail; |
| 646 | return bdev; |
| 647 | |
| 648 | fail: |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 649 | ext4_msg(sb, KERN_ERR, "failed to open journal device %s: %ld", |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 650 | __bdevname(dev, b), PTR_ERR(bdev)); |
| 651 | return NULL; |
| 652 | } |
| 653 | |
| 654 | /* |
| 655 | * Release the journal device |
| 656 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 657 | static int ext4_blkdev_put(struct block_device *bdev) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 658 | { |
| 659 | bd_release(bdev); |
Al Viro | 9a1c354 | 2008-02-22 20:40:24 -0500 | [diff] [blame] | 660 | return blkdev_put(bdev, FMODE_READ|FMODE_WRITE); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 661 | } |
| 662 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 663 | static int ext4_blkdev_remove(struct ext4_sb_info *sbi) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 664 | { |
| 665 | struct block_device *bdev; |
| 666 | int ret = -ENODEV; |
| 667 | |
| 668 | bdev = sbi->journal_bdev; |
| 669 | if (bdev) { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 670 | ret = ext4_blkdev_put(bdev); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 671 | sbi->journal_bdev = NULL; |
| 672 | } |
| 673 | return ret; |
| 674 | } |
| 675 | |
| 676 | static inline struct inode *orphan_list_entry(struct list_head *l) |
| 677 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 678 | return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 679 | } |
| 680 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 681 | 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] | 682 | { |
| 683 | struct list_head *l; |
| 684 | |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 685 | ext4_msg(sb, KERN_ERR, "sb orphan head is %d", |
| 686 | le32_to_cpu(sbi->s_es->s_last_orphan)); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 687 | |
| 688 | printk(KERN_ERR "sb_info orphan list:\n"); |
| 689 | list_for_each(l, &sbi->s_orphan) { |
| 690 | struct inode *inode = orphan_list_entry(l); |
| 691 | printk(KERN_ERR " " |
| 692 | "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", |
| 693 | inode->i_sb->s_id, inode->i_ino, inode, |
| 694 | inode->i_mode, inode->i_nlink, |
| 695 | NEXT_ORPHAN(inode)); |
| 696 | } |
| 697 | } |
| 698 | |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 699 | static void ext4_put_super(struct super_block *sb) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 700 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 701 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
| 702 | struct ext4_super_block *es = sbi->s_es; |
Hidehiro Kawai | ef2cabf | 2008-10-27 22:53:05 -0400 | [diff] [blame] | 703 | int i, err; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 704 | |
Christoph Hellwig | e0ccfd9 | 2010-05-19 07:16:42 -0400 | [diff] [blame] | 705 | dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); |
| 706 | |
Mingming Cao | 4c0425f | 2009-09-28 15:48:41 -0400 | [diff] [blame] | 707 | flush_workqueue(sbi->dio_unwritten_wq); |
| 708 | destroy_workqueue(sbi->dio_unwritten_wq); |
| 709 | |
Al Viro | a9e220f | 2009-05-05 22:10:44 -0400 | [diff] [blame] | 710 | lock_super(sb); |
Christoph Hellwig | 6cfd014 | 2009-05-05 15:40:36 +0200 | [diff] [blame] | 711 | lock_kernel(); |
Christoph Hellwig | 8c85e12 | 2009-04-28 18:00:26 +0200 | [diff] [blame] | 712 | if (sb->s_dirt) |
Christoph Hellwig | ebc1ac1 | 2009-05-11 23:35:03 +0200 | [diff] [blame] | 713 | ext4_commit_super(sb, 1); |
Christoph Hellwig | 8c85e12 | 2009-04-28 18:00:26 +0200 | [diff] [blame] | 714 | |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 715 | if (sbi->s_journal) { |
| 716 | err = jbd2_journal_destroy(sbi->s_journal); |
| 717 | sbi->s_journal = NULL; |
| 718 | if (err < 0) |
Theodore Ts'o | c67d859 | 2010-06-29 11:07:07 -0400 | [diff] [blame] | 719 | ext4_abort(sb, "Couldn't clean up the journal"); |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 720 | } |
Josef Bacik | d4edac3 | 2009-12-08 21:48:58 -0500 | [diff] [blame] | 721 | |
| 722 | ext4_release_system_zone(sb); |
| 723 | ext4_mb_release(sb); |
| 724 | ext4_ext_release(sb); |
| 725 | ext4_xattr_put_super(sb); |
| 726 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 727 | if (!(sb->s_flags & MS_RDONLY)) { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 728 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 729 | es->s_state = cpu_to_le16(sbi->s_mount_state); |
Theodore Ts'o | e2d6705 | 2009-05-01 00:33:44 -0400 | [diff] [blame] | 730 | ext4_commit_super(sb, 1); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 731 | } |
Theodore Ts'o | 240799c | 2008-10-09 23:53:47 -0400 | [diff] [blame] | 732 | if (sbi->s_proc) { |
Theodore Ts'o | 9f6200b | 2008-09-23 09:18:24 -0400 | [diff] [blame] | 733 | remove_proc_entry(sb->s_id, ext4_proc_root); |
Theodore Ts'o | 240799c | 2008-10-09 23:53:47 -0400 | [diff] [blame] | 734 | } |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 735 | kobject_del(&sbi->s_kobj); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 736 | |
| 737 | for (i = 0; i < sbi->s_gdb_count; i++) |
| 738 | brelse(sbi->s_group_desc[i]); |
| 739 | kfree(sbi->s_group_desc); |
Theodore Ts'o | c5ca7c7 | 2009-04-27 22:48:48 -0400 | [diff] [blame] | 740 | if (is_vmalloc_addr(sbi->s_flex_groups)) |
| 741 | vfree(sbi->s_flex_groups); |
| 742 | else |
| 743 | kfree(sbi->s_flex_groups); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 744 | percpu_counter_destroy(&sbi->s_freeblocks_counter); |
| 745 | percpu_counter_destroy(&sbi->s_freeinodes_counter); |
| 746 | percpu_counter_destroy(&sbi->s_dirs_counter); |
Aneesh Kumar K.V | 6bc6e63 | 2008-10-10 09:39:00 -0400 | [diff] [blame] | 747 | percpu_counter_destroy(&sbi->s_dirtyblocks_counter); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 748 | brelse(sbi->s_sbh); |
| 749 | #ifdef CONFIG_QUOTA |
| 750 | for (i = 0; i < MAXQUOTAS; i++) |
| 751 | kfree(sbi->s_qf_names[i]); |
| 752 | #endif |
| 753 | |
| 754 | /* Debugging code just in case the in-memory inode orphan list |
| 755 | * isn't empty. The on-disk one can be non-empty if we've |
| 756 | * detected an error and taken the fs readonly, but the |
| 757 | * in-memory list had better be clean by this point. */ |
| 758 | if (!list_empty(&sbi->s_orphan)) |
| 759 | dump_orphan_list(sb, sbi); |
| 760 | J_ASSERT(list_empty(&sbi->s_orphan)); |
| 761 | |
Peter Zijlstra | f98393a | 2007-05-06 14:49:54 -0700 | [diff] [blame] | 762 | invalidate_bdev(sb->s_bdev); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 763 | if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { |
| 764 | /* |
| 765 | * Invalidate the journal device's buffers. We don't want them |
| 766 | * floating about in memory - the physical journal device may |
| 767 | * hotswapped, and it breaks the `ro-after' testing code. |
| 768 | */ |
| 769 | sync_blockdev(sbi->journal_bdev); |
Peter Zijlstra | f98393a | 2007-05-06 14:49:54 -0700 | [diff] [blame] | 770 | invalidate_bdev(sbi->journal_bdev); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 771 | ext4_blkdev_remove(sbi); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 772 | } |
| 773 | sb->s_fs_info = NULL; |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 774 | /* |
| 775 | * Now that we are completely done shutting down the |
| 776 | * superblock, we need to actually destroy the kobject. |
| 777 | */ |
| 778 | unlock_kernel(); |
| 779 | unlock_super(sb); |
| 780 | kobject_put(&sbi->s_kobj); |
| 781 | wait_for_completion(&sbi->s_kobj_unregister); |
Pekka Enberg | 705895b | 2009-02-15 18:07:52 -0500 | [diff] [blame] | 782 | kfree(sbi->s_blockgroup_lock); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 783 | kfree(sbi); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 784 | } |
| 785 | |
Christoph Lameter | e18b890 | 2006-12-06 20:33:20 -0800 | [diff] [blame] | 786 | static struct kmem_cache *ext4_inode_cachep; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 787 | |
| 788 | /* |
| 789 | * Called inside transaction, so use GFP_NOFS |
| 790 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 791 | static struct inode *ext4_alloc_inode(struct super_block *sb) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 792 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 793 | struct ext4_inode_info *ei; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 794 | |
Christoph Lameter | e6b4f8d | 2006-12-06 20:33:14 -0800 | [diff] [blame] | 795 | ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 796 | if (!ei) |
| 797 | return NULL; |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 798 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 799 | ei->vfs_inode.i_version = 1; |
Aneesh Kumar K.V | 91246c0 | 2008-08-19 21:14:52 -0400 | [diff] [blame] | 800 | ei->vfs_inode.i_data.writeback_index = 0; |
Alex Tomas | a86c618 | 2006-10-11 01:21:03 -0700 | [diff] [blame] | 801 | memset(&ei->i_cached_extent, 0, sizeof(struct ext4_ext_cache)); |
Alex Tomas | c9de560 | 2008-01-29 00:19:52 -0500 | [diff] [blame] | 802 | INIT_LIST_HEAD(&ei->i_prealloc_list); |
| 803 | spin_lock_init(&ei->i_prealloc_lock); |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 804 | /* |
| 805 | * Note: We can be called before EXT4_SB(sb)->s_journal is set, |
| 806 | * therefore it can be null here. Don't check it, just initialize |
| 807 | * jinode. |
| 808 | */ |
Jan Kara | 678aaf4 | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 809 | jbd2_journal_init_jbd_inode(&ei->jinode, &ei->vfs_inode); |
Mingming Cao | d2a1763 | 2008-07-14 17:52:37 -0400 | [diff] [blame] | 810 | ei->i_reserved_data_blocks = 0; |
| 811 | ei->i_reserved_meta_blocks = 0; |
| 812 | ei->i_allocated_meta_blocks = 0; |
Theodore Ts'o | 9d0be50 | 2010-01-01 02:41:30 -0500 | [diff] [blame] | 813 | ei->i_da_metadata_calc_len = 0; |
Mingming Cao | d2a1763 | 2008-07-14 17:52:37 -0400 | [diff] [blame] | 814 | ei->i_delalloc_reserved_flag = 0; |
| 815 | spin_lock_init(&(ei->i_block_reservation_lock)); |
Dmitry Monakhov | a9e7f44 | 2009-12-14 15:21:14 +0300 | [diff] [blame] | 816 | #ifdef CONFIG_QUOTA |
| 817 | ei->i_reserved_quota = 0; |
| 818 | #endif |
Jiaying Zhang | c7064ef | 2010-03-02 13:28:44 -0500 | [diff] [blame] | 819 | INIT_LIST_HEAD(&ei->i_completed_io_list); |
Jiaying Zhang | 744692d | 2010-03-04 16:14:02 -0500 | [diff] [blame] | 820 | spin_lock_init(&ei->i_completed_io_lock); |
Mingming Cao | 8d5d02e | 2009-09-28 15:48:29 -0400 | [diff] [blame] | 821 | ei->cur_aio_dio = NULL; |
Jan Kara | b436b9b | 2009-12-08 23:51:10 -0500 | [diff] [blame] | 822 | ei->i_sync_tid = 0; |
| 823 | ei->i_datasync_tid = 0; |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 824 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 825 | return &ei->vfs_inode; |
| 826 | } |
| 827 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 828 | static void ext4_destroy_inode(struct inode *inode) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 829 | { |
Vasily Averin | 9f7dd93 | 2007-07-15 23:40:45 -0700 | [diff] [blame] | 830 | if (!list_empty(&(EXT4_I(inode)->i_orphan))) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 831 | ext4_msg(inode->i_sb, KERN_ERR, |
| 832 | "Inode %lu (%p): orphan list check failed!", |
| 833 | inode->i_ino, EXT4_I(inode)); |
Vasily Averin | 9f7dd93 | 2007-07-15 23:40:45 -0700 | [diff] [blame] | 834 | print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, |
| 835 | EXT4_I(inode), sizeof(struct ext4_inode_info), |
| 836 | true); |
| 837 | dump_stack(); |
| 838 | } |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 839 | kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 840 | } |
| 841 | |
Alexey Dobriyan | 51cc506 | 2008-07-25 19:45:34 -0700 | [diff] [blame] | 842 | static void init_once(void *foo) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 843 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 844 | struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 845 | |
Christoph Lameter | a35afb8 | 2007-05-16 22:10:57 -0700 | [diff] [blame] | 846 | INIT_LIST_HEAD(&ei->i_orphan); |
Theodore Ts'o | 03010a3 | 2008-10-10 20:02:48 -0400 | [diff] [blame] | 847 | #ifdef CONFIG_EXT4_FS_XATTR |
Christoph Lameter | a35afb8 | 2007-05-16 22:10:57 -0700 | [diff] [blame] | 848 | init_rwsem(&ei->xattr_sem); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 849 | #endif |
Aneesh Kumar K.V | 0e855ac | 2008-01-28 23:58:26 -0500 | [diff] [blame] | 850 | init_rwsem(&ei->i_data_sem); |
Christoph Lameter | a35afb8 | 2007-05-16 22:10:57 -0700 | [diff] [blame] | 851 | inode_init_once(&ei->vfs_inode); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 852 | } |
| 853 | |
| 854 | static int init_inodecache(void) |
| 855 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 856 | ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", |
| 857 | sizeof(struct ext4_inode_info), |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 858 | 0, (SLAB_RECLAIM_ACCOUNT| |
| 859 | SLAB_MEM_SPREAD), |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 860 | init_once); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 861 | if (ext4_inode_cachep == NULL) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 862 | return -ENOMEM; |
| 863 | return 0; |
| 864 | } |
| 865 | |
| 866 | static void destroy_inodecache(void) |
| 867 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 868 | kmem_cache_destroy(ext4_inode_cachep); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 869 | } |
| 870 | |
Al Viro | 0930fcc | 2010-06-07 13:16:22 -0400 | [diff] [blame] | 871 | void ext4_clear_inode(struct inode *inode) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 872 | { |
Al Viro | 0930fcc | 2010-06-07 13:16:22 -0400 | [diff] [blame] | 873 | invalidate_inode_buffers(inode); |
| 874 | end_writeback(inode); |
Christoph Hellwig | 9f75475 | 2010-03-03 09:05:05 -0500 | [diff] [blame] | 875 | dquot_drop(inode); |
Theodore Ts'o | c2ea3fd | 2008-10-10 09:40:52 -0400 | [diff] [blame] | 876 | ext4_discard_preallocations(inode); |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 877 | if (EXT4_JOURNAL(inode)) |
| 878 | jbd2_journal_release_jbd_inode(EXT4_SB(inode->i_sb)->s_journal, |
Jan Kara | 678aaf4 | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 879 | &EXT4_I(inode)->jinode); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 880 | } |
| 881 | |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 882 | static inline void ext4_show_quota_options(struct seq_file *seq, |
| 883 | struct super_block *sb) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 884 | { |
| 885 | #if defined(CONFIG_QUOTA) |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 886 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 887 | |
Jan Kara | 5a20bdf | 2009-11-30 23:58:32 +0100 | [diff] [blame] | 888 | if (sbi->s_jquota_fmt) { |
| 889 | char *fmtname = ""; |
| 890 | |
| 891 | switch (sbi->s_jquota_fmt) { |
| 892 | case QFMT_VFS_OLD: |
| 893 | fmtname = "vfsold"; |
| 894 | break; |
| 895 | case QFMT_VFS_V0: |
| 896 | fmtname = "vfsv0"; |
| 897 | break; |
| 898 | case QFMT_VFS_V1: |
| 899 | fmtname = "vfsv1"; |
| 900 | break; |
| 901 | } |
| 902 | seq_printf(seq, ",jqfmt=%s", fmtname); |
| 903 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 904 | |
| 905 | if (sbi->s_qf_names[USRQUOTA]) |
| 906 | seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); |
| 907 | |
| 908 | if (sbi->s_qf_names[GRPQUOTA]) |
| 909 | seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); |
| 910 | |
Dmitry Monakhov | 482a742 | 2010-02-24 11:35:32 -0500 | [diff] [blame] | 911 | if (test_opt(sb, USRQUOTA)) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 912 | seq_puts(seq, ",usrquota"); |
| 913 | |
Dmitry Monakhov | 482a742 | 2010-02-24 11:35:32 -0500 | [diff] [blame] | 914 | if (test_opt(sb, GRPQUOTA)) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 915 | seq_puts(seq, ",grpquota"); |
| 916 | #endif |
| 917 | } |
| 918 | |
Miklos Szeredi | d9c9bef | 2007-10-16 23:26:27 -0700 | [diff] [blame] | 919 | /* |
| 920 | * Show an option if |
| 921 | * - it's set to a non-default value OR |
| 922 | * - if the per-sb default is different from the global default |
| 923 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 924 | static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 925 | { |
Aneesh Kumar K.V | aa22df2 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 926 | int def_errors; |
| 927 | unsigned long def_mount_opts; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 928 | struct super_block *sb = vfs->mnt_sb; |
Miklos Szeredi | d9c9bef | 2007-10-16 23:26:27 -0700 | [diff] [blame] | 929 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
| 930 | struct ext4_super_block *es = sbi->s_es; |
Miklos Szeredi | d9c9bef | 2007-10-16 23:26:27 -0700 | [diff] [blame] | 931 | |
| 932 | def_mount_opts = le32_to_cpu(es->s_default_mount_opts); |
Aneesh Kumar K.V | aa22df2 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 933 | def_errors = le16_to_cpu(es->s_errors); |
Miklos Szeredi | d9c9bef | 2007-10-16 23:26:27 -0700 | [diff] [blame] | 934 | |
| 935 | if (sbi->s_sb_block != 1) |
| 936 | seq_printf(seq, ",sb=%llu", sbi->s_sb_block); |
| 937 | if (test_opt(sb, MINIX_DF)) |
| 938 | seq_puts(seq, ",minixdf"); |
Aneesh Kumar K.V | aa22df2 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 939 | if (test_opt(sb, GRPID) && !(def_mount_opts & EXT4_DEFM_BSDGROUPS)) |
Miklos Szeredi | d9c9bef | 2007-10-16 23:26:27 -0700 | [diff] [blame] | 940 | seq_puts(seq, ",grpid"); |
| 941 | if (!test_opt(sb, GRPID) && (def_mount_opts & EXT4_DEFM_BSDGROUPS)) |
| 942 | seq_puts(seq, ",nogrpid"); |
| 943 | if (sbi->s_resuid != EXT4_DEF_RESUID || |
| 944 | le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) { |
| 945 | seq_printf(seq, ",resuid=%u", sbi->s_resuid); |
| 946 | } |
| 947 | if (sbi->s_resgid != EXT4_DEF_RESGID || |
| 948 | le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) { |
| 949 | seq_printf(seq, ",resgid=%u", sbi->s_resgid); |
| 950 | } |
Aneesh Kumar K.V | bb4f397 | 2008-01-28 23:58:26 -0500 | [diff] [blame] | 951 | if (test_opt(sb, ERRORS_RO)) { |
Miklos Szeredi | d9c9bef | 2007-10-16 23:26:27 -0700 | [diff] [blame] | 952 | if (def_errors == EXT4_ERRORS_PANIC || |
Aneesh Kumar K.V | bb4f397 | 2008-01-28 23:58:26 -0500 | [diff] [blame] | 953 | def_errors == EXT4_ERRORS_CONTINUE) { |
| 954 | seq_puts(seq, ",errors=remount-ro"); |
Miklos Szeredi | d9c9bef | 2007-10-16 23:26:27 -0700 | [diff] [blame] | 955 | } |
| 956 | } |
Aneesh Kumar K.V | aa22df2 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 957 | if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) |
Aneesh Kumar K.V | bb4f397 | 2008-01-28 23:58:26 -0500 | [diff] [blame] | 958 | seq_puts(seq, ",errors=continue"); |
Aneesh Kumar K.V | aa22df2 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 959 | if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) |
Miklos Szeredi | d9c9bef | 2007-10-16 23:26:27 -0700 | [diff] [blame] | 960 | seq_puts(seq, ",errors=panic"); |
Aneesh Kumar K.V | aa22df2 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 961 | if (test_opt(sb, NO_UID32) && !(def_mount_opts & EXT4_DEFM_UID16)) |
Miklos Szeredi | d9c9bef | 2007-10-16 23:26:27 -0700 | [diff] [blame] | 962 | seq_puts(seq, ",nouid32"); |
Aneesh Kumar K.V | aa22df2 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 963 | if (test_opt(sb, DEBUG) && !(def_mount_opts & EXT4_DEFM_DEBUG)) |
Miklos Szeredi | d9c9bef | 2007-10-16 23:26:27 -0700 | [diff] [blame] | 964 | seq_puts(seq, ",debug"); |
| 965 | if (test_opt(sb, OLDALLOC)) |
| 966 | seq_puts(seq, ",oldalloc"); |
Theodore Ts'o | 03010a3 | 2008-10-10 20:02:48 -0400 | [diff] [blame] | 967 | #ifdef CONFIG_EXT4_FS_XATTR |
Aneesh Kumar K.V | aa22df2 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 968 | if (test_opt(sb, XATTR_USER) && |
| 969 | !(def_mount_opts & EXT4_DEFM_XATTR_USER)) |
Miklos Szeredi | d9c9bef | 2007-10-16 23:26:27 -0700 | [diff] [blame] | 970 | seq_puts(seq, ",user_xattr"); |
| 971 | if (!test_opt(sb, XATTR_USER) && |
| 972 | (def_mount_opts & EXT4_DEFM_XATTR_USER)) { |
| 973 | seq_puts(seq, ",nouser_xattr"); |
| 974 | } |
| 975 | #endif |
Theodore Ts'o | 03010a3 | 2008-10-10 20:02:48 -0400 | [diff] [blame] | 976 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
Aneesh Kumar K.V | aa22df2 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 977 | if (test_opt(sb, POSIX_ACL) && !(def_mount_opts & EXT4_DEFM_ACL)) |
Miklos Szeredi | d9c9bef | 2007-10-16 23:26:27 -0700 | [diff] [blame] | 978 | seq_puts(seq, ",acl"); |
| 979 | if (!test_opt(sb, POSIX_ACL) && (def_mount_opts & EXT4_DEFM_ACL)) |
| 980 | seq_puts(seq, ",noacl"); |
| 981 | #endif |
Theodore Ts'o | 3077384 | 2009-01-03 20:27:38 -0500 | [diff] [blame] | 982 | if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { |
Miklos Szeredi | d9c9bef | 2007-10-16 23:26:27 -0700 | [diff] [blame] | 983 | seq_printf(seq, ",commit=%u", |
| 984 | (unsigned) (sbi->s_commit_interval / HZ)); |
| 985 | } |
Theodore Ts'o | 3077384 | 2009-01-03 20:27:38 -0500 | [diff] [blame] | 986 | if (sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) { |
| 987 | seq_printf(seq, ",min_batch_time=%u", |
| 988 | (unsigned) sbi->s_min_batch_time); |
| 989 | } |
| 990 | if (sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) { |
| 991 | seq_printf(seq, ",max_batch_time=%u", |
| 992 | (unsigned) sbi->s_min_batch_time); |
| 993 | } |
| 994 | |
Eric Sandeen | 571640c | 2008-05-26 12:29:46 -0400 | [diff] [blame] | 995 | /* |
| 996 | * We're changing the default of barrier mount option, so |
| 997 | * let's always display its mount state so it's clear what its |
| 998 | * status is. |
| 999 | */ |
| 1000 | seq_puts(seq, ",barrier="); |
| 1001 | seq_puts(seq, test_opt(sb, BARRIER) ? "1" : "0"); |
Theodore Ts'o | cd0b6a3 | 2008-05-26 10:28:28 -0400 | [diff] [blame] | 1002 | if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) |
| 1003 | seq_puts(seq, ",journal_async_commit"); |
Jan Kara | 39a4bad | 2010-05-16 17:00:00 -0400 | [diff] [blame] | 1004 | else if (test_opt(sb, JOURNAL_CHECKSUM)) |
| 1005 | seq_puts(seq, ",journal_checksum"); |
Jean Noel Cordenner | 25ec56b | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 1006 | if (test_opt(sb, I_VERSION)) |
| 1007 | seq_puts(seq, ",i_version"); |
Theodore Ts'o | 8b67f04 | 2010-08-01 23:14:20 -0400 | [diff] [blame] | 1008 | if (!test_opt(sb, DELALLOC) && |
| 1009 | !(def_mount_opts & EXT4_DEFM_NODELALLOC)) |
Aneesh Kumar K.V | dd919b9 | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 1010 | seq_puts(seq, ",nodelalloc"); |
| 1011 | |
Miklos Szeredi | cb45bbe | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 1012 | if (sbi->s_stripe) |
| 1013 | seq_printf(seq, ",stripe=%lu", sbi->s_stripe); |
Aneesh Kumar K.V | aa22df2 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 1014 | /* |
| 1015 | * journal mode get enabled in different ways |
| 1016 | * So just print the value even if we didn't specify it |
| 1017 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1018 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1019 | seq_puts(seq, ",data=journal"); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1020 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1021 | seq_puts(seq, ",data=ordered"); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1022 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1023 | seq_puts(seq, ",data=writeback"); |
| 1024 | |
Theodore Ts'o | 240799c | 2008-10-09 23:53:47 -0400 | [diff] [blame] | 1025 | if (sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) |
| 1026 | seq_printf(seq, ",inode_readahead_blks=%u", |
| 1027 | sbi->s_inode_readahead_blks); |
| 1028 | |
Hidehiro Kawai | 5bf5683 | 2008-10-10 22:12:43 -0400 | [diff] [blame] | 1029 | if (test_opt(sb, DATA_ERR_ABORT)) |
| 1030 | seq_puts(seq, ",data_err=abort"); |
| 1031 | |
Theodore Ts'o | afd4672 | 2009-03-16 23:12:23 -0400 | [diff] [blame] | 1032 | if (test_opt(sb, NO_AUTO_DA_ALLOC)) |
Theodore Ts'o | 06705bf | 2009-03-28 10:59:57 -0400 | [diff] [blame] | 1033 | seq_puts(seq, ",noauto_da_alloc"); |
Theodore Ts'o | afd4672 | 2009-03-16 23:12:23 -0400 | [diff] [blame] | 1034 | |
Theodore Ts'o | 8b67f04 | 2010-08-01 23:14:20 -0400 | [diff] [blame] | 1035 | if (test_opt(sb, DISCARD) && !(def_mount_opts & EXT4_DEFM_DISCARD)) |
Eric Sandeen | 5328e63 | 2009-11-19 14:25:42 -0500 | [diff] [blame] | 1036 | seq_puts(seq, ",discard"); |
| 1037 | |
Eric Sandeen | e3bb52a | 2009-11-19 14:28:50 -0500 | [diff] [blame] | 1038 | if (test_opt(sb, NOLOAD)) |
| 1039 | seq_puts(seq, ",norecovery"); |
| 1040 | |
Jiaying Zhang | 744692d | 2010-03-04 16:14:02 -0500 | [diff] [blame] | 1041 | if (test_opt(sb, DIOREAD_NOLOCK)) |
| 1042 | seq_puts(seq, ",dioread_nolock"); |
| 1043 | |
Theodore Ts'o | 8b67f04 | 2010-08-01 23:14:20 -0400 | [diff] [blame] | 1044 | if (test_opt(sb, BLOCK_VALIDITY) && |
| 1045 | !(def_mount_opts & EXT4_DEFM_BLOCK_VALIDITY)) |
| 1046 | seq_puts(seq, ",block_validity"); |
| 1047 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1048 | ext4_show_quota_options(seq, sb); |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 1049 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1050 | return 0; |
| 1051 | } |
| 1052 | |
Christoph Hellwig | 1b961ac | 2007-10-21 16:42:08 -0700 | [diff] [blame] | 1053 | static struct inode *ext4_nfs_get_inode(struct super_block *sb, |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 1054 | u64 ino, u32 generation) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1055 | { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1056 | struct inode *inode; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1057 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1058 | if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1059 | return ERR_PTR(-ESTALE); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1060 | 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] | 1061 | return ERR_PTR(-ESTALE); |
| 1062 | |
| 1063 | /* iget isn't really right if the inode is currently unallocated!! |
| 1064 | * |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1065 | * 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] | 1066 | * deleted, so we should be safe. |
| 1067 | * |
| 1068 | * Currently we don't know the generation for parent directory, so |
| 1069 | * a generation of 0 means "accept any" |
| 1070 | */ |
David Howells | 1d1fe1e | 2008-02-07 00:15:37 -0800 | [diff] [blame] | 1071 | inode = ext4_iget(sb, ino); |
| 1072 | if (IS_ERR(inode)) |
| 1073 | return ERR_CAST(inode); |
| 1074 | if (generation && inode->i_generation != generation) { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1075 | iput(inode); |
| 1076 | return ERR_PTR(-ESTALE); |
| 1077 | } |
Christoph Hellwig | 1b961ac | 2007-10-21 16:42:08 -0700 | [diff] [blame] | 1078 | |
| 1079 | return inode; |
| 1080 | } |
| 1081 | |
| 1082 | 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] | 1083 | int fh_len, int fh_type) |
Christoph Hellwig | 1b961ac | 2007-10-21 16:42:08 -0700 | [diff] [blame] | 1084 | { |
| 1085 | return generic_fh_to_dentry(sb, fid, fh_len, fh_type, |
| 1086 | ext4_nfs_get_inode); |
| 1087 | } |
| 1088 | |
| 1089 | 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] | 1090 | int fh_len, int fh_type) |
Christoph Hellwig | 1b961ac | 2007-10-21 16:42:08 -0700 | [diff] [blame] | 1091 | { |
| 1092 | return generic_fh_to_parent(sb, fid, fh_len, fh_type, |
| 1093 | ext4_nfs_get_inode); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1094 | } |
| 1095 | |
Toshiyuki Okajima | c39a7f8 | 2009-01-05 22:38:48 -0500 | [diff] [blame] | 1096 | /* |
| 1097 | * Try to release metadata pages (indirect blocks, directories) which are |
| 1098 | * mapped via the block device. Since these pages could have journal heads |
| 1099 | * which would prevent try_to_free_buffers() from freeing them, we must use |
| 1100 | * jbd2 layer's try_to_free_buffers() function to release them. |
| 1101 | */ |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 1102 | static int bdev_try_to_free_page(struct super_block *sb, struct page *page, |
| 1103 | gfp_t wait) |
Toshiyuki Okajima | c39a7f8 | 2009-01-05 22:38:48 -0500 | [diff] [blame] | 1104 | { |
| 1105 | journal_t *journal = EXT4_SB(sb)->s_journal; |
| 1106 | |
| 1107 | WARN_ON(PageChecked(page)); |
| 1108 | if (!page_has_buffers(page)) |
| 1109 | return 0; |
| 1110 | if (journal) |
| 1111 | return jbd2_journal_try_to_free_buffers(journal, page, |
| 1112 | wait & ~__GFP_WAIT); |
| 1113 | return try_to_free_buffers(page); |
| 1114 | } |
| 1115 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1116 | #ifdef CONFIG_QUOTA |
Theodore Ts'o | af5bc92 | 2008-09-08 22:25:24 -0400 | [diff] [blame] | 1117 | #define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group") |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 1118 | #define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1119 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1120 | static int ext4_write_dquot(struct dquot *dquot); |
| 1121 | static int ext4_acquire_dquot(struct dquot *dquot); |
| 1122 | static int ext4_release_dquot(struct dquot *dquot); |
| 1123 | static int ext4_mark_dquot_dirty(struct dquot *dquot); |
| 1124 | static int ext4_write_info(struct super_block *sb, int type); |
Jan Kara | 6f28e08 | 2008-04-28 02:14:34 -0700 | [diff] [blame] | 1125 | static int ext4_quota_on(struct super_block *sb, int type, int format_id, |
Christoph Hellwig | 307ae18 | 2010-05-19 07:16:43 -0400 | [diff] [blame] | 1126 | char *path); |
Dmitry Monakhov | ca0e05e | 2010-08-01 17:48:36 -0400 | [diff] [blame] | 1127 | static int ext4_quota_off(struct super_block *sb, int type); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1128 | static int ext4_quota_on_mount(struct super_block *sb, int type); |
| 1129 | 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] | 1130 | size_t len, loff_t off); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1131 | static ssize_t ext4_quota_write(struct super_block *sb, int type, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1132 | const char *data, size_t len, loff_t off); |
| 1133 | |
Alexey Dobriyan | 61e225d | 2009-09-21 17:01:08 -0700 | [diff] [blame] | 1134 | static const struct dquot_operations ext4_quota_operations = { |
Dmitry Monakhov | a9e7f44 | 2009-12-14 15:21:14 +0300 | [diff] [blame] | 1135 | #ifdef CONFIG_QUOTA |
Mingming Cao | 60e58e0 | 2009-01-22 18:13:05 +0100 | [diff] [blame] | 1136 | .get_reserved_space = ext4_get_reserved_space, |
Dmitry Monakhov | a9e7f44 | 2009-12-14 15:21:14 +0300 | [diff] [blame] | 1137 | #endif |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1138 | .write_dquot = ext4_write_dquot, |
| 1139 | .acquire_dquot = ext4_acquire_dquot, |
| 1140 | .release_dquot = ext4_release_dquot, |
| 1141 | .mark_dirty = ext4_mark_dquot_dirty, |
Jan Kara | a5b5ee3 | 2008-11-25 15:31:35 +0100 | [diff] [blame] | 1142 | .write_info = ext4_write_info, |
| 1143 | .alloc_dquot = dquot_alloc, |
| 1144 | .destroy_dquot = dquot_destroy, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1145 | }; |
| 1146 | |
Alexey Dobriyan | 0d54b21 | 2009-09-21 17:01:09 -0700 | [diff] [blame] | 1147 | static const struct quotactl_ops ext4_qctl_operations = { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1148 | .quota_on = ext4_quota_on, |
Dmitry Monakhov | ca0e05e | 2010-08-01 17:48:36 -0400 | [diff] [blame] | 1149 | .quota_off = ext4_quota_off, |
Christoph Hellwig | 287a809 | 2010-05-19 07:16:45 -0400 | [diff] [blame] | 1150 | .quota_sync = dquot_quota_sync, |
| 1151 | .get_info = dquot_get_dqinfo, |
| 1152 | .set_info = dquot_set_dqinfo, |
| 1153 | .get_dqblk = dquot_get_dqblk, |
| 1154 | .set_dqblk = dquot_set_dqblk |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1155 | }; |
| 1156 | #endif |
| 1157 | |
Josef 'Jeff' Sipek | ee9b6d6 | 2007-02-12 00:55:41 -0800 | [diff] [blame] | 1158 | static const struct super_operations ext4_sops = { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1159 | .alloc_inode = ext4_alloc_inode, |
| 1160 | .destroy_inode = ext4_destroy_inode, |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1161 | .write_inode = ext4_write_inode, |
| 1162 | .dirty_inode = ext4_dirty_inode, |
Al Viro | 0930fcc | 2010-06-07 13:16:22 -0400 | [diff] [blame] | 1163 | .evict_inode = ext4_evict_inode, |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1164 | .put_super = ext4_put_super, |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1165 | .sync_fs = ext4_sync_fs, |
Takashi Sato | c4be0c1 | 2009-01-09 16:40:58 -0800 | [diff] [blame] | 1166 | .freeze_fs = ext4_freeze, |
| 1167 | .unfreeze_fs = ext4_unfreeze, |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1168 | .statfs = ext4_statfs, |
| 1169 | .remount_fs = ext4_remount, |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1170 | .show_options = ext4_show_options, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1171 | #ifdef CONFIG_QUOTA |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1172 | .quota_read = ext4_quota_read, |
| 1173 | .quota_write = ext4_quota_write, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1174 | #endif |
Toshiyuki Okajima | c39a7f8 | 2009-01-05 22:38:48 -0500 | [diff] [blame] | 1175 | .bdev_try_to_free_page = bdev_try_to_free_page, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1176 | }; |
| 1177 | |
Theodore Ts'o | 9ca9238 | 2009-05-01 12:52:25 -0400 | [diff] [blame] | 1178 | static const struct super_operations ext4_nojournal_sops = { |
| 1179 | .alloc_inode = ext4_alloc_inode, |
| 1180 | .destroy_inode = ext4_destroy_inode, |
| 1181 | .write_inode = ext4_write_inode, |
| 1182 | .dirty_inode = ext4_dirty_inode, |
Al Viro | 0930fcc | 2010-06-07 13:16:22 -0400 | [diff] [blame] | 1183 | .evict_inode = ext4_evict_inode, |
Theodore Ts'o | 9ca9238 | 2009-05-01 12:52:25 -0400 | [diff] [blame] | 1184 | .write_super = ext4_write_super, |
| 1185 | .put_super = ext4_put_super, |
| 1186 | .statfs = ext4_statfs, |
| 1187 | .remount_fs = ext4_remount, |
Theodore Ts'o | 9ca9238 | 2009-05-01 12:52:25 -0400 | [diff] [blame] | 1188 | .show_options = ext4_show_options, |
| 1189 | #ifdef CONFIG_QUOTA |
| 1190 | .quota_read = ext4_quota_read, |
| 1191 | .quota_write = ext4_quota_write, |
| 1192 | #endif |
| 1193 | .bdev_try_to_free_page = bdev_try_to_free_page, |
| 1194 | }; |
| 1195 | |
Christoph Hellwig | 3965516 | 2007-10-21 16:42:17 -0700 | [diff] [blame] | 1196 | static const struct export_operations ext4_export_ops = { |
Christoph Hellwig | 1b961ac | 2007-10-21 16:42:08 -0700 | [diff] [blame] | 1197 | .fh_to_dentry = ext4_fh_to_dentry, |
| 1198 | .fh_to_parent = ext4_fh_to_parent, |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1199 | .get_parent = ext4_get_parent, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1200 | }; |
| 1201 | |
| 1202 | enum { |
| 1203 | Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, |
| 1204 | Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, |
Theodore Ts'o | 01436ef | 2008-10-17 07:22:35 -0400 | [diff] [blame] | 1205 | Opt_nouid32, Opt_debug, Opt_oldalloc, Opt_orlov, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1206 | Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, |
Theodore Ts'o | 06705bf | 2009-03-28 10:59:57 -0400 | [diff] [blame] | 1207 | Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, Opt_nobh, Opt_bh, |
Theodore Ts'o | 3077384 | 2009-01-03 20:27:38 -0500 | [diff] [blame] | 1208 | Opt_commit, Opt_min_batch_time, Opt_max_batch_time, |
Theodore Ts'o | c319106 | 2009-01-06 11:14:25 -0500 | [diff] [blame] | 1209 | Opt_journal_update, Opt_journal_dev, |
Girish Shilamkar | 818d276 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 1210 | Opt_journal_checksum, Opt_journal_async_commit, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1211 | Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, |
Theodore Ts'o | 296c355 | 2009-09-30 00:32:42 -0400 | [diff] [blame] | 1212 | Opt_data_err_abort, Opt_data_err_ignore, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1213 | Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, |
Jan Kara | 5a20bdf | 2009-11-30 23:58:32 +0100 | [diff] [blame] | 1214 | Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, |
| 1215 | Opt_noquota, Opt_ignore, Opt_barrier, Opt_nobarrier, Opt_err, |
| 1216 | Opt_resize, Opt_usrquota, Opt_grpquota, Opt_i_version, |
Theodore Ts'o | 01436ef | 2008-10-17 07:22:35 -0400 | [diff] [blame] | 1217 | Opt_stripe, Opt_delalloc, Opt_nodelalloc, |
Theodore Ts'o | 6fd058f | 2009-05-17 15:38:01 -0400 | [diff] [blame] | 1218 | Opt_block_validity, Opt_noblock_validity, |
Eric Sandeen | 5328e63 | 2009-11-19 14:25:42 -0500 | [diff] [blame] | 1219 | Opt_inode_readahead_blks, Opt_journal_ioprio, |
Jiaying Zhang | 744692d | 2010-03-04 16:14:02 -0500 | [diff] [blame] | 1220 | Opt_dioread_nolock, Opt_dioread_lock, |
Eric Sandeen | 5328e63 | 2009-11-19 14:25:42 -0500 | [diff] [blame] | 1221 | Opt_discard, Opt_nodiscard, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1222 | }; |
| 1223 | |
Steven Whitehouse | a447c09 | 2008-10-13 10:46:57 +0100 | [diff] [blame] | 1224 | static const match_table_t tokens = { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1225 | {Opt_bsd_df, "bsddf"}, |
| 1226 | {Opt_minix_df, "minixdf"}, |
| 1227 | {Opt_grpid, "grpid"}, |
| 1228 | {Opt_grpid, "bsdgroups"}, |
| 1229 | {Opt_nogrpid, "nogrpid"}, |
| 1230 | {Opt_nogrpid, "sysvgroups"}, |
| 1231 | {Opt_resgid, "resgid=%u"}, |
| 1232 | {Opt_resuid, "resuid=%u"}, |
| 1233 | {Opt_sb, "sb=%u"}, |
| 1234 | {Opt_err_cont, "errors=continue"}, |
| 1235 | {Opt_err_panic, "errors=panic"}, |
| 1236 | {Opt_err_ro, "errors=remount-ro"}, |
| 1237 | {Opt_nouid32, "nouid32"}, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1238 | {Opt_debug, "debug"}, |
| 1239 | {Opt_oldalloc, "oldalloc"}, |
| 1240 | {Opt_orlov, "orlov"}, |
| 1241 | {Opt_user_xattr, "user_xattr"}, |
| 1242 | {Opt_nouser_xattr, "nouser_xattr"}, |
| 1243 | {Opt_acl, "acl"}, |
| 1244 | {Opt_noacl, "noacl"}, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1245 | {Opt_noload, "noload"}, |
Eric Sandeen | e3bb52a | 2009-11-19 14:28:50 -0500 | [diff] [blame] | 1246 | {Opt_noload, "norecovery"}, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1247 | {Opt_nobh, "nobh"}, |
| 1248 | {Opt_bh, "bh"}, |
| 1249 | {Opt_commit, "commit=%u"}, |
Theodore Ts'o | 3077384 | 2009-01-03 20:27:38 -0500 | [diff] [blame] | 1250 | {Opt_min_batch_time, "min_batch_time=%u"}, |
| 1251 | {Opt_max_batch_time, "max_batch_time=%u"}, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1252 | {Opt_journal_update, "journal=update"}, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1253 | {Opt_journal_dev, "journal_dev=%u"}, |
Girish Shilamkar | 818d276 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 1254 | {Opt_journal_checksum, "journal_checksum"}, |
| 1255 | {Opt_journal_async_commit, "journal_async_commit"}, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1256 | {Opt_abort, "abort"}, |
| 1257 | {Opt_data_journal, "data=journal"}, |
| 1258 | {Opt_data_ordered, "data=ordered"}, |
| 1259 | {Opt_data_writeback, "data=writeback"}, |
Hidehiro Kawai | 5bf5683 | 2008-10-10 22:12:43 -0400 | [diff] [blame] | 1260 | {Opt_data_err_abort, "data_err=abort"}, |
| 1261 | {Opt_data_err_ignore, "data_err=ignore"}, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1262 | {Opt_offusrjquota, "usrjquota="}, |
| 1263 | {Opt_usrjquota, "usrjquota=%s"}, |
| 1264 | {Opt_offgrpjquota, "grpjquota="}, |
| 1265 | {Opt_grpjquota, "grpjquota=%s"}, |
| 1266 | {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, |
| 1267 | {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, |
Jan Kara | 5a20bdf | 2009-11-30 23:58:32 +0100 | [diff] [blame] | 1268 | {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1269 | {Opt_grpquota, "grpquota"}, |
| 1270 | {Opt_noquota, "noquota"}, |
| 1271 | {Opt_quota, "quota"}, |
| 1272 | {Opt_usrquota, "usrquota"}, |
| 1273 | {Opt_barrier, "barrier=%u"}, |
Theodore Ts'o | 06705bf | 2009-03-28 10:59:57 -0400 | [diff] [blame] | 1274 | {Opt_barrier, "barrier"}, |
| 1275 | {Opt_nobarrier, "nobarrier"}, |
Jean Noel Cordenner | 25ec56b | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 1276 | {Opt_i_version, "i_version"}, |
Alex Tomas | c9de560 | 2008-01-29 00:19:52 -0500 | [diff] [blame] | 1277 | {Opt_stripe, "stripe=%u"}, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1278 | {Opt_resize, "resize"}, |
Alex Tomas | 6476924 | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 1279 | {Opt_delalloc, "delalloc"}, |
Aneesh Kumar K.V | dd919b9 | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 1280 | {Opt_nodelalloc, "nodelalloc"}, |
Theodore Ts'o | 6fd058f | 2009-05-17 15:38:01 -0400 | [diff] [blame] | 1281 | {Opt_block_validity, "block_validity"}, |
| 1282 | {Opt_noblock_validity, "noblock_validity"}, |
Theodore Ts'o | 240799c | 2008-10-09 23:53:47 -0400 | [diff] [blame] | 1283 | {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, |
Theodore Ts'o | b3881f7 | 2009-01-05 22:46:26 -0500 | [diff] [blame] | 1284 | {Opt_journal_ioprio, "journal_ioprio=%u"}, |
Theodore Ts'o | afd4672 | 2009-03-16 23:12:23 -0400 | [diff] [blame] | 1285 | {Opt_auto_da_alloc, "auto_da_alloc=%u"}, |
Theodore Ts'o | 06705bf | 2009-03-28 10:59:57 -0400 | [diff] [blame] | 1286 | {Opt_auto_da_alloc, "auto_da_alloc"}, |
| 1287 | {Opt_noauto_da_alloc, "noauto_da_alloc"}, |
Jiaying Zhang | 744692d | 2010-03-04 16:14:02 -0500 | [diff] [blame] | 1288 | {Opt_dioread_nolock, "dioread_nolock"}, |
| 1289 | {Opt_dioread_lock, "dioread_lock"}, |
Eric Sandeen | 5328e63 | 2009-11-19 14:25:42 -0500 | [diff] [blame] | 1290 | {Opt_discard, "discard"}, |
| 1291 | {Opt_nodiscard, "nodiscard"}, |
Josef Bacik | f3f12fa | 2008-04-29 22:05:28 -0400 | [diff] [blame] | 1292 | {Opt_err, NULL}, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1293 | }; |
| 1294 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1295 | static ext4_fsblk_t get_sb_block(void **data) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1296 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1297 | ext4_fsblk_t sb_block; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1298 | char *options = (char *) *data; |
| 1299 | |
| 1300 | if (!options || strncmp(options, "sb=", 3) != 0) |
| 1301 | return 1; /* Default location */ |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 1302 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1303 | options += 3; |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 1304 | /* TODO: use simple_strtoll with >32bit ext4 */ |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1305 | sb_block = simple_strtoul(options, &options, 0); |
| 1306 | if (*options && *options != ',') { |
Theodore Ts'o | 4776004 | 2008-09-08 23:00:52 -0400 | [diff] [blame] | 1307 | printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1308 | (char *) *data); |
| 1309 | return 1; |
| 1310 | } |
| 1311 | if (*options == ',') |
| 1312 | options++; |
| 1313 | *data = (void *) options; |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 1314 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1315 | return sb_block; |
| 1316 | } |
| 1317 | |
Theodore Ts'o | b3881f7 | 2009-01-05 22:46:26 -0500 | [diff] [blame] | 1318 | #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) |
Dmitry Monakhov | 437ca0f | 2010-03-01 22:29:21 -0500 | [diff] [blame] | 1319 | static char deprecated_msg[] = "Mount option \"%s\" will be removed by %s\n" |
| 1320 | "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] | 1321 | |
Dmitry Monakhov | 56c50f1 | 2010-03-01 23:28:41 -0500 | [diff] [blame] | 1322 | #ifdef CONFIG_QUOTA |
| 1323 | static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) |
| 1324 | { |
| 1325 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
| 1326 | char *qname; |
| 1327 | |
| 1328 | if (sb_any_quota_loaded(sb) && |
| 1329 | !sbi->s_qf_names[qtype]) { |
| 1330 | ext4_msg(sb, KERN_ERR, |
| 1331 | "Cannot change journaled " |
| 1332 | "quota options when quota turned on"); |
| 1333 | return 0; |
| 1334 | } |
| 1335 | qname = match_strdup(args); |
| 1336 | if (!qname) { |
| 1337 | ext4_msg(sb, KERN_ERR, |
| 1338 | "Not enough memory for storing quotafile name"); |
| 1339 | return 0; |
| 1340 | } |
| 1341 | if (sbi->s_qf_names[qtype] && |
| 1342 | strcmp(sbi->s_qf_names[qtype], qname)) { |
| 1343 | ext4_msg(sb, KERN_ERR, |
| 1344 | "%s quota file already specified", QTYPE2NAME(qtype)); |
| 1345 | kfree(qname); |
| 1346 | return 0; |
| 1347 | } |
| 1348 | sbi->s_qf_names[qtype] = qname; |
| 1349 | if (strchr(sbi->s_qf_names[qtype], '/')) { |
| 1350 | ext4_msg(sb, KERN_ERR, |
| 1351 | "quotafile must be on filesystem root"); |
| 1352 | kfree(sbi->s_qf_names[qtype]); |
| 1353 | sbi->s_qf_names[qtype] = NULL; |
| 1354 | return 0; |
| 1355 | } |
| 1356 | set_opt(sbi->s_mount_opt, QUOTA); |
| 1357 | return 1; |
| 1358 | } |
| 1359 | |
| 1360 | static int clear_qf_name(struct super_block *sb, int qtype) |
| 1361 | { |
| 1362 | |
| 1363 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
| 1364 | |
| 1365 | if (sb_any_quota_loaded(sb) && |
| 1366 | sbi->s_qf_names[qtype]) { |
| 1367 | ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" |
| 1368 | " when quota turned on"); |
| 1369 | return 0; |
| 1370 | } |
| 1371 | /* |
| 1372 | * The space will be released later when all options are confirmed |
| 1373 | * to be correct |
| 1374 | */ |
| 1375 | sbi->s_qf_names[qtype] = NULL; |
| 1376 | return 1; |
| 1377 | } |
| 1378 | #endif |
| 1379 | |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 1380 | static int parse_options(char *options, struct super_block *sb, |
Theodore Ts'o | c319106 | 2009-01-06 11:14:25 -0500 | [diff] [blame] | 1381 | unsigned long *journal_devnum, |
Theodore Ts'o | b3881f7 | 2009-01-05 22:46:26 -0500 | [diff] [blame] | 1382 | unsigned int *journal_ioprio, |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 1383 | ext4_fsblk_t *n_blocks_count, int is_remount) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1384 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1385 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 1386 | char *p; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1387 | substring_t args[MAX_OPT_ARGS]; |
| 1388 | int data_opt = 0; |
| 1389 | int option; |
| 1390 | #ifdef CONFIG_QUOTA |
Dmitry Monakhov | 56c50f1 | 2010-03-01 23:28:41 -0500 | [diff] [blame] | 1391 | int qfmt; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1392 | #endif |
| 1393 | |
| 1394 | if (!options) |
| 1395 | return 1; |
| 1396 | |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 1397 | while ((p = strsep(&options, ",")) != NULL) { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1398 | int token; |
| 1399 | if (!*p) |
| 1400 | continue; |
| 1401 | |
Eric Sandeen | 15121c1 | 2010-02-15 20:17:55 -0500 | [diff] [blame] | 1402 | /* |
| 1403 | * Initialize args struct so we know whether arg was |
| 1404 | * found; some options take optional arguments. |
| 1405 | */ |
| 1406 | args[0].to = args[0].from = 0; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1407 | token = match_token(p, tokens, args); |
| 1408 | switch (token) { |
| 1409 | case Opt_bsd_df: |
Dmitry Monakhov | 437ca0f | 2010-03-01 22:29:21 -0500 | [diff] [blame] | 1410 | ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 1411 | clear_opt(sbi->s_mount_opt, MINIX_DF); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1412 | break; |
| 1413 | case Opt_minix_df: |
Dmitry Monakhov | 437ca0f | 2010-03-01 22:29:21 -0500 | [diff] [blame] | 1414 | ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 1415 | set_opt(sbi->s_mount_opt, MINIX_DF); |
Dmitry Monakhov | 437ca0f | 2010-03-01 22:29:21 -0500 | [diff] [blame] | 1416 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1417 | break; |
| 1418 | case Opt_grpid: |
Dmitry Monakhov | 437ca0f | 2010-03-01 22:29:21 -0500 | [diff] [blame] | 1419 | ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 1420 | set_opt(sbi->s_mount_opt, GRPID); |
Dmitry Monakhov | 437ca0f | 2010-03-01 22:29:21 -0500 | [diff] [blame] | 1421 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1422 | break; |
| 1423 | case Opt_nogrpid: |
Dmitry Monakhov | 437ca0f | 2010-03-01 22:29:21 -0500 | [diff] [blame] | 1424 | ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 1425 | clear_opt(sbi->s_mount_opt, GRPID); |
Dmitry Monakhov | 437ca0f | 2010-03-01 22:29:21 -0500 | [diff] [blame] | 1426 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1427 | break; |
| 1428 | case Opt_resuid: |
| 1429 | if (match_int(&args[0], &option)) |
| 1430 | return 0; |
| 1431 | sbi->s_resuid = option; |
| 1432 | break; |
| 1433 | case Opt_resgid: |
| 1434 | if (match_int(&args[0], &option)) |
| 1435 | return 0; |
| 1436 | sbi->s_resgid = option; |
| 1437 | break; |
| 1438 | case Opt_sb: |
| 1439 | /* handled by get_sb_block() instead of here */ |
| 1440 | /* *sb_block = match_int(&args[0]); */ |
| 1441 | break; |
| 1442 | case Opt_err_panic: |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 1443 | clear_opt(sbi->s_mount_opt, ERRORS_CONT); |
| 1444 | clear_opt(sbi->s_mount_opt, ERRORS_RO); |
| 1445 | set_opt(sbi->s_mount_opt, ERRORS_PANIC); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1446 | break; |
| 1447 | case Opt_err_ro: |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 1448 | clear_opt(sbi->s_mount_opt, ERRORS_CONT); |
| 1449 | clear_opt(sbi->s_mount_opt, ERRORS_PANIC); |
| 1450 | set_opt(sbi->s_mount_opt, ERRORS_RO); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1451 | break; |
| 1452 | case Opt_err_cont: |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 1453 | clear_opt(sbi->s_mount_opt, ERRORS_RO); |
| 1454 | clear_opt(sbi->s_mount_opt, ERRORS_PANIC); |
| 1455 | set_opt(sbi->s_mount_opt, ERRORS_CONT); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1456 | break; |
| 1457 | case Opt_nouid32: |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 1458 | set_opt(sbi->s_mount_opt, NO_UID32); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1459 | break; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1460 | case Opt_debug: |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 1461 | set_opt(sbi->s_mount_opt, DEBUG); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1462 | break; |
| 1463 | case Opt_oldalloc: |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 1464 | set_opt(sbi->s_mount_opt, OLDALLOC); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1465 | break; |
| 1466 | case Opt_orlov: |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 1467 | clear_opt(sbi->s_mount_opt, OLDALLOC); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1468 | break; |
Theodore Ts'o | 03010a3 | 2008-10-10 20:02:48 -0400 | [diff] [blame] | 1469 | #ifdef CONFIG_EXT4_FS_XATTR |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1470 | case Opt_user_xattr: |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 1471 | set_opt(sbi->s_mount_opt, XATTR_USER); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1472 | break; |
| 1473 | case Opt_nouser_xattr: |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 1474 | clear_opt(sbi->s_mount_opt, XATTR_USER); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1475 | break; |
| 1476 | #else |
| 1477 | case Opt_user_xattr: |
| 1478 | case Opt_nouser_xattr: |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 1479 | ext4_msg(sb, KERN_ERR, "(no)user_xattr options not supported"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1480 | break; |
| 1481 | #endif |
Theodore Ts'o | 03010a3 | 2008-10-10 20:02:48 -0400 | [diff] [blame] | 1482 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1483 | case Opt_acl: |
| 1484 | set_opt(sbi->s_mount_opt, POSIX_ACL); |
| 1485 | break; |
| 1486 | case Opt_noacl: |
| 1487 | clear_opt(sbi->s_mount_opt, POSIX_ACL); |
| 1488 | break; |
| 1489 | #else |
| 1490 | case Opt_acl: |
| 1491 | case Opt_noacl: |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 1492 | ext4_msg(sb, KERN_ERR, "(no)acl options not supported"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1493 | break; |
| 1494 | #endif |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1495 | case Opt_journal_update: |
| 1496 | /* @@@ FIXME */ |
| 1497 | /* Eventually we will want to be able to create |
| 1498 | a journal file here. For now, only allow the |
| 1499 | user to specify an existing inode to be the |
| 1500 | journal file. */ |
| 1501 | if (is_remount) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 1502 | ext4_msg(sb, KERN_ERR, |
| 1503 | "Cannot specify journal on remount"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1504 | return 0; |
| 1505 | } |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 1506 | set_opt(sbi->s_mount_opt, UPDATE_JOURNAL); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1507 | break; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1508 | case Opt_journal_dev: |
| 1509 | if (is_remount) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 1510 | ext4_msg(sb, KERN_ERR, |
| 1511 | "Cannot specify journal on remount"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1512 | return 0; |
| 1513 | } |
| 1514 | if (match_int(&args[0], &option)) |
| 1515 | return 0; |
| 1516 | *journal_devnum = option; |
| 1517 | break; |
Girish Shilamkar | 818d276 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 1518 | case Opt_journal_checksum: |
Linus Torvalds | d4da6c9 | 2009-11-02 10:15:27 -0800 | [diff] [blame] | 1519 | set_opt(sbi->s_mount_opt, JOURNAL_CHECKSUM); |
| 1520 | break; |
Girish Shilamkar | 818d276 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 1521 | case Opt_journal_async_commit: |
| 1522 | set_opt(sbi->s_mount_opt, JOURNAL_ASYNC_COMMIT); |
Linus Torvalds | d4da6c9 | 2009-11-02 10:15:27 -0800 | [diff] [blame] | 1523 | set_opt(sbi->s_mount_opt, JOURNAL_CHECKSUM); |
Girish Shilamkar | 818d276 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 1524 | break; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1525 | case Opt_noload: |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 1526 | set_opt(sbi->s_mount_opt, NOLOAD); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1527 | break; |
| 1528 | case Opt_commit: |
| 1529 | if (match_int(&args[0], &option)) |
| 1530 | return 0; |
| 1531 | if (option < 0) |
| 1532 | return 0; |
| 1533 | if (option == 0) |
Mingming Cao | cd02ff0 | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 1534 | option = JBD2_DEFAULT_MAX_COMMIT_AGE; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1535 | sbi->s_commit_interval = HZ * option; |
| 1536 | break; |
Theodore Ts'o | 3077384 | 2009-01-03 20:27:38 -0500 | [diff] [blame] | 1537 | case Opt_max_batch_time: |
| 1538 | if (match_int(&args[0], &option)) |
| 1539 | return 0; |
| 1540 | if (option < 0) |
| 1541 | return 0; |
| 1542 | if (option == 0) |
| 1543 | option = EXT4_DEF_MAX_BATCH_TIME; |
| 1544 | sbi->s_max_batch_time = option; |
| 1545 | break; |
| 1546 | case Opt_min_batch_time: |
| 1547 | if (match_int(&args[0], &option)) |
| 1548 | return 0; |
| 1549 | if (option < 0) |
| 1550 | return 0; |
| 1551 | sbi->s_min_batch_time = option; |
| 1552 | break; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1553 | case Opt_data_journal: |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1554 | data_opt = EXT4_MOUNT_JOURNAL_DATA; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1555 | goto datacheck; |
| 1556 | case Opt_data_ordered: |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1557 | data_opt = EXT4_MOUNT_ORDERED_DATA; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1558 | goto datacheck; |
| 1559 | case Opt_data_writeback: |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1560 | data_opt = EXT4_MOUNT_WRITEBACK_DATA; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1561 | datacheck: |
| 1562 | if (is_remount) { |
Dmitry Monakhov | 482a742 | 2010-02-24 11:35:32 -0500 | [diff] [blame] | 1563 | if (test_opt(sb, DATA_FLAGS) != data_opt) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 1564 | ext4_msg(sb, KERN_ERR, |
| 1565 | "Cannot change data mode on remount"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1566 | return 0; |
| 1567 | } |
| 1568 | } else { |
Dmitry Monakhov | 482a742 | 2010-02-24 11:35:32 -0500 | [diff] [blame] | 1569 | clear_opt(sbi->s_mount_opt, DATA_FLAGS); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1570 | sbi->s_mount_opt |= data_opt; |
| 1571 | } |
| 1572 | break; |
Hidehiro Kawai | 5bf5683 | 2008-10-10 22:12:43 -0400 | [diff] [blame] | 1573 | case Opt_data_err_abort: |
| 1574 | set_opt(sbi->s_mount_opt, DATA_ERR_ABORT); |
| 1575 | break; |
| 1576 | case Opt_data_err_ignore: |
| 1577 | clear_opt(sbi->s_mount_opt, DATA_ERR_ABORT); |
| 1578 | break; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1579 | #ifdef CONFIG_QUOTA |
| 1580 | case Opt_usrjquota: |
Dmitry Monakhov | 56c50f1 | 2010-03-01 23:28:41 -0500 | [diff] [blame] | 1581 | if (!set_qf_name(sb, USRQUOTA, &args[0])) |
| 1582 | return 0; |
| 1583 | break; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1584 | case Opt_grpjquota: |
Dmitry Monakhov | 56c50f1 | 2010-03-01 23:28:41 -0500 | [diff] [blame] | 1585 | if (!set_qf_name(sb, GRPQUOTA, &args[0])) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1586 | return 0; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1587 | break; |
| 1588 | case Opt_offusrjquota: |
Dmitry Monakhov | 56c50f1 | 2010-03-01 23:28:41 -0500 | [diff] [blame] | 1589 | if (!clear_qf_name(sb, USRQUOTA)) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1590 | return 0; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1591 | break; |
Dmitry Monakhov | 56c50f1 | 2010-03-01 23:28:41 -0500 | [diff] [blame] | 1592 | case Opt_offgrpjquota: |
| 1593 | if (!clear_qf_name(sb, GRPQUOTA)) |
| 1594 | return 0; |
| 1595 | break; |
| 1596 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1597 | case Opt_jqfmt_vfsold: |
Jan Kara | dfc5d03 | 2008-05-13 19:11:51 -0400 | [diff] [blame] | 1598 | qfmt = QFMT_VFS_OLD; |
| 1599 | goto set_qf_format; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1600 | case Opt_jqfmt_vfsv0: |
Jan Kara | dfc5d03 | 2008-05-13 19:11:51 -0400 | [diff] [blame] | 1601 | qfmt = QFMT_VFS_V0; |
Jan Kara | 5a20bdf | 2009-11-30 23:58:32 +0100 | [diff] [blame] | 1602 | goto set_qf_format; |
| 1603 | case Opt_jqfmt_vfsv1: |
| 1604 | qfmt = QFMT_VFS_V1; |
Jan Kara | dfc5d03 | 2008-05-13 19:11:51 -0400 | [diff] [blame] | 1605 | set_qf_format: |
Jan Kara | 17bd13b | 2008-08-20 18:14:35 +0200 | [diff] [blame] | 1606 | if (sb_any_quota_loaded(sb) && |
Jan Kara | dfc5d03 | 2008-05-13 19:11:51 -0400 | [diff] [blame] | 1607 | sbi->s_jquota_fmt != qfmt) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 1608 | ext4_msg(sb, KERN_ERR, "Cannot change " |
Jan Kara | dfc5d03 | 2008-05-13 19:11:51 -0400 | [diff] [blame] | 1609 | "journaled quota options when " |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 1610 | "quota turned on"); |
Jan Kara | dfc5d03 | 2008-05-13 19:11:51 -0400 | [diff] [blame] | 1611 | return 0; |
| 1612 | } |
| 1613 | sbi->s_jquota_fmt = qfmt; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1614 | break; |
| 1615 | case Opt_quota: |
| 1616 | case Opt_usrquota: |
| 1617 | set_opt(sbi->s_mount_opt, QUOTA); |
| 1618 | set_opt(sbi->s_mount_opt, USRQUOTA); |
| 1619 | break; |
| 1620 | case Opt_grpquota: |
| 1621 | set_opt(sbi->s_mount_opt, QUOTA); |
| 1622 | set_opt(sbi->s_mount_opt, GRPQUOTA); |
| 1623 | break; |
| 1624 | case Opt_noquota: |
Jan Kara | 17bd13b | 2008-08-20 18:14:35 +0200 | [diff] [blame] | 1625 | if (sb_any_quota_loaded(sb)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 1626 | ext4_msg(sb, KERN_ERR, "Cannot change quota " |
| 1627 | "options when quota turned on"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1628 | return 0; |
| 1629 | } |
| 1630 | clear_opt(sbi->s_mount_opt, QUOTA); |
| 1631 | clear_opt(sbi->s_mount_opt, USRQUOTA); |
| 1632 | clear_opt(sbi->s_mount_opt, GRPQUOTA); |
| 1633 | break; |
| 1634 | #else |
| 1635 | case Opt_quota: |
| 1636 | case Opt_usrquota: |
| 1637 | case Opt_grpquota: |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 1638 | ext4_msg(sb, KERN_ERR, |
| 1639 | "quota options not supported"); |
Jan Kara | cd59e7b | 2008-05-13 19:11:51 -0400 | [diff] [blame] | 1640 | break; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1641 | case Opt_usrjquota: |
| 1642 | case Opt_grpjquota: |
| 1643 | case Opt_offusrjquota: |
| 1644 | case Opt_offgrpjquota: |
| 1645 | case Opt_jqfmt_vfsold: |
| 1646 | case Opt_jqfmt_vfsv0: |
Jan Kara | 5a20bdf | 2009-11-30 23:58:32 +0100 | [diff] [blame] | 1647 | case Opt_jqfmt_vfsv1: |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 1648 | ext4_msg(sb, KERN_ERR, |
| 1649 | "journaled quota options not supported"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1650 | break; |
| 1651 | case Opt_noquota: |
| 1652 | break; |
| 1653 | #endif |
| 1654 | case Opt_abort: |
Theodore Ts'o | 4ab2f15 | 2009-06-13 10:09:36 -0400 | [diff] [blame] | 1655 | sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1656 | break; |
Theodore Ts'o | 06705bf | 2009-03-28 10:59:57 -0400 | [diff] [blame] | 1657 | case Opt_nobarrier: |
| 1658 | clear_opt(sbi->s_mount_opt, BARRIER); |
| 1659 | break; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1660 | case Opt_barrier: |
Eric Sandeen | 15121c1 | 2010-02-15 20:17:55 -0500 | [diff] [blame] | 1661 | if (args[0].from) { |
| 1662 | if (match_int(&args[0], &option)) |
| 1663 | return 0; |
| 1664 | } else |
| 1665 | option = 1; /* No argument, default to 1 */ |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1666 | if (option) |
| 1667 | set_opt(sbi->s_mount_opt, BARRIER); |
| 1668 | else |
| 1669 | clear_opt(sbi->s_mount_opt, BARRIER); |
| 1670 | break; |
| 1671 | case Opt_ignore: |
| 1672 | break; |
| 1673 | case Opt_resize: |
| 1674 | if (!is_remount) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 1675 | ext4_msg(sb, KERN_ERR, |
| 1676 | "resize option only available " |
| 1677 | "for remount"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1678 | return 0; |
| 1679 | } |
| 1680 | if (match_int(&args[0], &option) != 0) |
| 1681 | return 0; |
| 1682 | *n_blocks_count = option; |
| 1683 | break; |
| 1684 | case Opt_nobh: |
Christoph Hellwig | 206f7ab | 2010-06-14 14:42:49 -0400 | [diff] [blame] | 1685 | ext4_msg(sb, KERN_WARNING, |
| 1686 | "Ignoring deprecated nobh option"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1687 | break; |
| 1688 | case Opt_bh: |
Christoph Hellwig | 206f7ab | 2010-06-14 14:42:49 -0400 | [diff] [blame] | 1689 | ext4_msg(sb, KERN_WARNING, |
| 1690 | "Ignoring deprecated bh option"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1691 | break; |
Jean Noel Cordenner | 25ec56b | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 1692 | case Opt_i_version: |
| 1693 | set_opt(sbi->s_mount_opt, I_VERSION); |
| 1694 | sb->s_flags |= MS_I_VERSION; |
| 1695 | break; |
Aneesh Kumar K.V | dd919b9 | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 1696 | case Opt_nodelalloc: |
| 1697 | clear_opt(sbi->s_mount_opt, DELALLOC); |
| 1698 | break; |
Alex Tomas | c9de560 | 2008-01-29 00:19:52 -0500 | [diff] [blame] | 1699 | case Opt_stripe: |
| 1700 | if (match_int(&args[0], &option)) |
| 1701 | return 0; |
| 1702 | if (option < 0) |
| 1703 | return 0; |
| 1704 | sbi->s_stripe = option; |
| 1705 | break; |
Alex Tomas | 6476924 | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 1706 | case Opt_delalloc: |
| 1707 | set_opt(sbi->s_mount_opt, DELALLOC); |
| 1708 | break; |
Theodore Ts'o | 6fd058f | 2009-05-17 15:38:01 -0400 | [diff] [blame] | 1709 | case Opt_block_validity: |
| 1710 | set_opt(sbi->s_mount_opt, BLOCK_VALIDITY); |
| 1711 | break; |
| 1712 | case Opt_noblock_validity: |
| 1713 | clear_opt(sbi->s_mount_opt, BLOCK_VALIDITY); |
| 1714 | break; |
Theodore Ts'o | 240799c | 2008-10-09 23:53:47 -0400 | [diff] [blame] | 1715 | case Opt_inode_readahead_blks: |
| 1716 | if (match_int(&args[0], &option)) |
| 1717 | return 0; |
| 1718 | if (option < 0 || option > (1 << 30)) |
| 1719 | return 0; |
Theodore Ts'o | f7c4395 | 2009-04-24 23:31:59 -0400 | [diff] [blame] | 1720 | if (!is_power_of_2(option)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 1721 | ext4_msg(sb, KERN_ERR, |
| 1722 | "EXT4-fs: inode_readahead_blks" |
| 1723 | " must be a power of 2"); |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 1724 | return 0; |
| 1725 | } |
Theodore Ts'o | 240799c | 2008-10-09 23:53:47 -0400 | [diff] [blame] | 1726 | sbi->s_inode_readahead_blks = option; |
| 1727 | break; |
Theodore Ts'o | b3881f7 | 2009-01-05 22:46:26 -0500 | [diff] [blame] | 1728 | case Opt_journal_ioprio: |
| 1729 | if (match_int(&args[0], &option)) |
| 1730 | return 0; |
| 1731 | if (option < 0 || option > 7) |
| 1732 | break; |
| 1733 | *journal_ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, |
| 1734 | option); |
| 1735 | break; |
Theodore Ts'o | 06705bf | 2009-03-28 10:59:57 -0400 | [diff] [blame] | 1736 | case Opt_noauto_da_alloc: |
| 1737 | set_opt(sbi->s_mount_opt,NO_AUTO_DA_ALLOC); |
| 1738 | break; |
Theodore Ts'o | afd4672 | 2009-03-16 23:12:23 -0400 | [diff] [blame] | 1739 | case Opt_auto_da_alloc: |
Eric Sandeen | 15121c1 | 2010-02-15 20:17:55 -0500 | [diff] [blame] | 1740 | if (args[0].from) { |
| 1741 | if (match_int(&args[0], &option)) |
| 1742 | return 0; |
| 1743 | } else |
| 1744 | option = 1; /* No argument, default to 1 */ |
Theodore Ts'o | afd4672 | 2009-03-16 23:12:23 -0400 | [diff] [blame] | 1745 | if (option) |
| 1746 | clear_opt(sbi->s_mount_opt, NO_AUTO_DA_ALLOC); |
| 1747 | else |
| 1748 | set_opt(sbi->s_mount_opt,NO_AUTO_DA_ALLOC); |
| 1749 | break; |
Eric Sandeen | 5328e63 | 2009-11-19 14:25:42 -0500 | [diff] [blame] | 1750 | case Opt_discard: |
| 1751 | set_opt(sbi->s_mount_opt, DISCARD); |
| 1752 | break; |
| 1753 | case Opt_nodiscard: |
| 1754 | clear_opt(sbi->s_mount_opt, DISCARD); |
| 1755 | break; |
Jiaying Zhang | 744692d | 2010-03-04 16:14:02 -0500 | [diff] [blame] | 1756 | case Opt_dioread_nolock: |
| 1757 | set_opt(sbi->s_mount_opt, DIOREAD_NOLOCK); |
| 1758 | break; |
| 1759 | case Opt_dioread_lock: |
| 1760 | clear_opt(sbi->s_mount_opt, DIOREAD_NOLOCK); |
| 1761 | break; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1762 | default: |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 1763 | ext4_msg(sb, KERN_ERR, |
| 1764 | "Unrecognized mount option \"%s\" " |
| 1765 | "or missing value", p); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1766 | return 0; |
| 1767 | } |
| 1768 | } |
| 1769 | #ifdef CONFIG_QUOTA |
| 1770 | if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { |
Dmitry Monakhov | 482a742 | 2010-02-24 11:35:32 -0500 | [diff] [blame] | 1771 | if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1772 | clear_opt(sbi->s_mount_opt, USRQUOTA); |
| 1773 | |
Dmitry Monakhov | 482a742 | 2010-02-24 11:35:32 -0500 | [diff] [blame] | 1774 | if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1775 | clear_opt(sbi->s_mount_opt, GRPQUOTA); |
| 1776 | |
Dmitry Monakhov | 56c50f1 | 2010-03-01 23:28:41 -0500 | [diff] [blame] | 1777 | if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 1778 | ext4_msg(sb, KERN_ERR, "old and new quota " |
| 1779 | "format mixing"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1780 | return 0; |
| 1781 | } |
| 1782 | |
| 1783 | if (!sbi->s_jquota_fmt) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 1784 | ext4_msg(sb, KERN_ERR, "journaled quota format " |
| 1785 | "not specified"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1786 | return 0; |
| 1787 | } |
| 1788 | } else { |
| 1789 | if (sbi->s_jquota_fmt) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 1790 | ext4_msg(sb, KERN_ERR, "journaled quota format " |
Jan Kara | 2c8be6b | 2008-05-13 21:27:55 -0400 | [diff] [blame] | 1791 | "specified with no journaling " |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 1792 | "enabled"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1793 | return 0; |
| 1794 | } |
| 1795 | } |
| 1796 | #endif |
| 1797 | return 1; |
| 1798 | } |
| 1799 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1800 | 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] | 1801 | int read_only) |
| 1802 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1803 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1804 | int res = 0; |
| 1805 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1806 | if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 1807 | ext4_msg(sb, KERN_ERR, "revision level too high, " |
| 1808 | "forcing read-only mode"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1809 | res = MS_RDONLY; |
| 1810 | } |
| 1811 | if (read_only) |
| 1812 | return res; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1813 | if (!(sbi->s_mount_state & EXT4_VALID_FS)) |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 1814 | ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " |
| 1815 | "running e2fsck is recommended"); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1816 | else if ((sbi->s_mount_state & EXT4_ERROR_FS)) |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 1817 | ext4_msg(sb, KERN_WARNING, |
| 1818 | "warning: mounting fs with errors, " |
| 1819 | "running e2fsck is recommended"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1820 | else if ((__s16) le16_to_cpu(es->s_max_mnt_count) >= 0 && |
| 1821 | le16_to_cpu(es->s_mnt_count) >= |
| 1822 | (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 1823 | ext4_msg(sb, KERN_WARNING, |
| 1824 | "warning: maximal mount count reached, " |
| 1825 | "running e2fsck is recommended"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1826 | else if (le32_to_cpu(es->s_checkinterval) && |
| 1827 | (le32_to_cpu(es->s_lastcheck) + |
| 1828 | le32_to_cpu(es->s_checkinterval) <= get_seconds())) |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 1829 | ext4_msg(sb, KERN_WARNING, |
| 1830 | "warning: checktime reached, " |
| 1831 | "running e2fsck is recommended"); |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 1832 | if (!sbi->s_journal) |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 1833 | es->s_state &= cpu_to_le16(~EXT4_VALID_FS); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1834 | if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1835 | 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] | 1836 | le16_add_cpu(&es->s_mnt_count, 1); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1837 | es->s_mtime = cpu_to_le32(get_seconds()); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1838 | ext4_update_dynamic_rev(sb); |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 1839 | if (sbi->s_journal) |
| 1840 | EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1841 | |
Theodore Ts'o | e2d6705 | 2009-05-01 00:33:44 -0400 | [diff] [blame] | 1842 | ext4_commit_super(sb, 1); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1843 | if (test_opt(sb, DEBUG)) |
Theodore Ts'o | a9df9a4 | 2009-01-05 22:18:16 -0500 | [diff] [blame] | 1844 | printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " |
Theodore Ts'o | 7f4520c | 2009-06-13 10:09:41 -0400 | [diff] [blame] | 1845 | "bpg=%lu, ipg=%lu, mo=%04x]\n", |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1846 | sb->s_blocksize, |
| 1847 | sbi->s_groups_count, |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1848 | EXT4_BLOCKS_PER_GROUP(sb), |
| 1849 | EXT4_INODES_PER_GROUP(sb), |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1850 | sbi->s_mount_opt); |
| 1851 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1852 | return res; |
| 1853 | } |
| 1854 | |
Jose R. Santos | 772cb7c | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 1855 | static int ext4_fill_flex_info(struct super_block *sb) |
| 1856 | { |
| 1857 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
| 1858 | struct ext4_group_desc *gdp = NULL; |
Jose R. Santos | 772cb7c | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 1859 | ext4_group_t flex_group_count; |
| 1860 | ext4_group_t flex_group; |
| 1861 | int groups_per_flex = 0; |
Theodore Ts'o | c5ca7c7 | 2009-04-27 22:48:48 -0400 | [diff] [blame] | 1862 | size_t size; |
Jose R. Santos | 772cb7c | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 1863 | int i; |
| 1864 | |
Theodore Ts'o | 503358a | 2009-11-23 07:24:46 -0500 | [diff] [blame] | 1865 | sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; |
| 1866 | groups_per_flex = 1 << sbi->s_log_groups_per_flex; |
| 1867 | |
| 1868 | if (groups_per_flex < 2) { |
Jose R. Santos | 772cb7c | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 1869 | sbi->s_log_groups_per_flex = 0; |
| 1870 | return 1; |
| 1871 | } |
| 1872 | |
Frederic Bohe | c62a11f | 2008-09-08 10:20:24 -0400 | [diff] [blame] | 1873 | /* We allocate both existing and potentially added groups */ |
| 1874 | 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] | 1875 | ((le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) + 1) << |
| 1876 | EXT4_DESC_PER_BLOCK_BITS(sb))) / groups_per_flex; |
Theodore Ts'o | c5ca7c7 | 2009-04-27 22:48:48 -0400 | [diff] [blame] | 1877 | size = flex_group_count * sizeof(struct flex_groups); |
| 1878 | sbi->s_flex_groups = kzalloc(size, GFP_KERNEL); |
| 1879 | if (sbi->s_flex_groups == NULL) { |
| 1880 | sbi->s_flex_groups = vmalloc(size); |
| 1881 | if (sbi->s_flex_groups) |
| 1882 | memset(sbi->s_flex_groups, 0, size); |
| 1883 | } |
Jose R. Santos | 772cb7c | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 1884 | if (sbi->s_flex_groups == NULL) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 1885 | ext4_msg(sb, KERN_ERR, "not enough memory for " |
| 1886 | "%u flex groups", flex_group_count); |
Jose R. Santos | 772cb7c | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 1887 | goto failed; |
| 1888 | } |
Jose R. Santos | 772cb7c | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 1889 | |
Jose R. Santos | 772cb7c | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 1890 | for (i = 0; i < sbi->s_groups_count; i++) { |
Theodore Ts'o | 88b6edd | 2009-05-25 11:50:39 -0400 | [diff] [blame] | 1891 | gdp = ext4_get_group_desc(sb, i, NULL); |
Jose R. Santos | 772cb7c | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 1892 | |
| 1893 | flex_group = ext4_flex_group(sbi, i); |
Theodore Ts'o | 7ad9bb6 | 2009-09-11 16:51:28 -0400 | [diff] [blame] | 1894 | atomic_add(ext4_free_inodes_count(sb, gdp), |
| 1895 | &sbi->s_flex_groups[flex_group].free_inodes); |
| 1896 | atomic_add(ext4_free_blks_count(sb, gdp), |
| 1897 | &sbi->s_flex_groups[flex_group].free_blocks); |
| 1898 | atomic_add(ext4_used_dirs_count(sb, gdp), |
| 1899 | &sbi->s_flex_groups[flex_group].used_dirs); |
Jose R. Santos | 772cb7c | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 1900 | } |
| 1901 | |
| 1902 | return 1; |
| 1903 | failed: |
| 1904 | return 0; |
| 1905 | } |
| 1906 | |
Andreas Dilger | 717d50e | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 1907 | __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group, |
| 1908 | struct ext4_group_desc *gdp) |
| 1909 | { |
| 1910 | __u16 crc = 0; |
| 1911 | |
| 1912 | if (sbi->s_es->s_feature_ro_compat & |
| 1913 | cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) { |
| 1914 | int offset = offsetof(struct ext4_group_desc, bg_checksum); |
| 1915 | __le32 le_group = cpu_to_le32(block_group); |
| 1916 | |
| 1917 | crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); |
| 1918 | crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); |
| 1919 | crc = crc16(crc, (__u8 *)gdp, offset); |
| 1920 | offset += sizeof(gdp->bg_checksum); /* skip checksum */ |
| 1921 | /* for checksum of struct ext4_group_desc do the rest...*/ |
| 1922 | if ((sbi->s_es->s_feature_incompat & |
| 1923 | cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT)) && |
| 1924 | offset < le16_to_cpu(sbi->s_es->s_desc_size)) |
| 1925 | crc = crc16(crc, (__u8 *)gdp + offset, |
| 1926 | le16_to_cpu(sbi->s_es->s_desc_size) - |
| 1927 | offset); |
| 1928 | } |
| 1929 | |
| 1930 | return cpu_to_le16(crc); |
| 1931 | } |
| 1932 | |
| 1933 | int ext4_group_desc_csum_verify(struct ext4_sb_info *sbi, __u32 block_group, |
| 1934 | struct ext4_group_desc *gdp) |
| 1935 | { |
| 1936 | if ((sbi->s_es->s_feature_ro_compat & |
| 1937 | cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) && |
| 1938 | (gdp->bg_checksum != ext4_group_desc_csum(sbi, block_group, gdp))) |
| 1939 | return 0; |
| 1940 | |
| 1941 | return 1; |
| 1942 | } |
| 1943 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1944 | /* Called at mount-time, super-block is locked */ |
Akinobu Mita | 197cd65a | 2008-02-06 01:40:16 -0800 | [diff] [blame] | 1945 | static int ext4_check_descriptors(struct super_block *sb) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1946 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1947 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
| 1948 | ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); |
| 1949 | ext4_fsblk_t last_block; |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 1950 | ext4_fsblk_t block_bitmap; |
| 1951 | ext4_fsblk_t inode_bitmap; |
| 1952 | ext4_fsblk_t inode_table; |
Jose R. Santos | ce42158 | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 1953 | int flexbg_flag = 0; |
Avantika Mathur | fd2d429 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 1954 | ext4_group_t i; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1955 | |
Jose R. Santos | ce42158 | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 1956 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) |
| 1957 | flexbg_flag = 1; |
| 1958 | |
Theodore Ts'o | af5bc92 | 2008-09-08 22:25:24 -0400 | [diff] [blame] | 1959 | ext4_debug("Checking group descriptors"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1960 | |
Akinobu Mita | 197cd65a | 2008-02-06 01:40:16 -0800 | [diff] [blame] | 1961 | for (i = 0; i < sbi->s_groups_count; i++) { |
| 1962 | struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); |
| 1963 | |
Jose R. Santos | ce42158 | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 1964 | if (i == sbi->s_groups_count - 1 || flexbg_flag) |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 1965 | last_block = ext4_blocks_count(sbi->s_es) - 1; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1966 | else |
| 1967 | last_block = first_block + |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1968 | (EXT4_BLOCKS_PER_GROUP(sb) - 1); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1969 | |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 1970 | block_bitmap = ext4_block_bitmap(sb, gdp); |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 1971 | if (block_bitmap < first_block || block_bitmap > last_block) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 1972 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
Theodore Ts'o | a9df9a4 | 2009-01-05 22:18:16 -0500 | [diff] [blame] | 1973 | "Block bitmap for group %u not in group " |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 1974 | "(block %llu)!", i, block_bitmap); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1975 | return 0; |
| 1976 | } |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 1977 | inode_bitmap = ext4_inode_bitmap(sb, gdp); |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 1978 | if (inode_bitmap < first_block || inode_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 | "Inode bitmap for group %u not in group " |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 1981 | "(block %llu)!", i, inode_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_table = ext4_inode_table(sb, gdp); |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 1985 | if (inode_table < first_block || |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 1986 | inode_table + sbi->s_itb_per_group - 1 > last_block) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 1987 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
Theodore Ts'o | a9df9a4 | 2009-01-05 22:18:16 -0500 | [diff] [blame] | 1988 | "Inode table for group %u not in group " |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 1989 | "(block %llu)!", i, inode_table); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1990 | return 0; |
| 1991 | } |
Aneesh Kumar K.V | 955ce5f | 2009-05-02 20:35:09 -0400 | [diff] [blame] | 1992 | ext4_lock_group(sb, i); |
Andreas Dilger | 717d50e | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 1993 | if (!ext4_group_desc_csum_verify(sbi, i, gdp)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 1994 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
| 1995 | "Checksum for group %u failed (%u!=%u)", |
| 1996 | i, le16_to_cpu(ext4_group_desc_csum(sbi, i, |
| 1997 | gdp)), le16_to_cpu(gdp->bg_checksum)); |
Li Zefan | 7ee1ec4 | 2008-09-08 10:47:19 -0400 | [diff] [blame] | 1998 | if (!(sb->s_flags & MS_RDONLY)) { |
Aneesh Kumar K.V | 955ce5f | 2009-05-02 20:35:09 -0400 | [diff] [blame] | 1999 | ext4_unlock_group(sb, i); |
Theodore Ts'o | 8a26646 | 2008-07-26 14:34:21 -0400 | [diff] [blame] | 2000 | return 0; |
Li Zefan | 7ee1ec4 | 2008-09-08 10:47:19 -0400 | [diff] [blame] | 2001 | } |
Andreas Dilger | 717d50e | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 2002 | } |
Aneesh Kumar K.V | 955ce5f | 2009-05-02 20:35:09 -0400 | [diff] [blame] | 2003 | ext4_unlock_group(sb, i); |
Jose R. Santos | ce42158 | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 2004 | if (!flexbg_flag) |
| 2005 | first_block += EXT4_BLOCKS_PER_GROUP(sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2006 | } |
| 2007 | |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 2008 | ext4_free_blocks_count_set(sbi->s_es, ext4_count_free_blocks(sb)); |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 2009 | 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] | 2010 | return 1; |
| 2011 | } |
| 2012 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2013 | /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2014 | * the superblock) which were deleted from all directories, but held open by |
| 2015 | * a process at the time of a crash. We walk the list and try to delete these |
| 2016 | * inodes at recovery time (only with a read-write filesystem). |
| 2017 | * |
| 2018 | * In order to keep the orphan inode chain consistent during traversal (in |
| 2019 | * case of crash during recovery), we link each inode into the superblock |
| 2020 | * orphan list_head and handle it the same way as an inode deletion during |
| 2021 | * normal operation (which journals the operations for us). |
| 2022 | * |
| 2023 | * We only do an iget() and an iput() on each inode, which is very safe if we |
| 2024 | * accidentally point at an in-use or already deleted inode. The worst that |
| 2025 | * 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] | 2026 | * 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] | 2027 | * e2fsck was run on this filesystem, and it must have already done the orphan |
| 2028 | * inode cleanup for us, so we can safely abort without any further action. |
| 2029 | */ |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 2030 | static void ext4_orphan_cleanup(struct super_block *sb, |
| 2031 | struct ext4_super_block *es) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2032 | { |
| 2033 | unsigned int s_flags = sb->s_flags; |
| 2034 | int nr_orphans = 0, nr_truncates = 0; |
| 2035 | #ifdef CONFIG_QUOTA |
| 2036 | int i; |
| 2037 | #endif |
| 2038 | if (!es->s_last_orphan) { |
| 2039 | jbd_debug(4, "no orphan inodes to clean up\n"); |
| 2040 | return; |
| 2041 | } |
| 2042 | |
Eric Sandeen | a8f48a9 | 2006-12-06 20:40:13 -0800 | [diff] [blame] | 2043 | if (bdev_read_only(sb->s_bdev)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 2044 | ext4_msg(sb, KERN_ERR, "write access " |
| 2045 | "unavailable, skipping orphan cleanup"); |
Eric Sandeen | a8f48a9 | 2006-12-06 20:40:13 -0800 | [diff] [blame] | 2046 | return; |
| 2047 | } |
| 2048 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2049 | if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2050 | if (es->s_last_orphan) |
| 2051 | jbd_debug(1, "Errors on filesystem, " |
| 2052 | "clearing orphan list.\n"); |
| 2053 | es->s_last_orphan = 0; |
| 2054 | jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); |
| 2055 | return; |
| 2056 | } |
| 2057 | |
| 2058 | if (s_flags & MS_RDONLY) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 2059 | ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2060 | sb->s_flags &= ~MS_RDONLY; |
| 2061 | } |
| 2062 | #ifdef CONFIG_QUOTA |
| 2063 | /* Needed for iput() to work correctly and not trash data */ |
| 2064 | sb->s_flags |= MS_ACTIVE; |
| 2065 | /* Turn on quotas so that they are updated correctly */ |
| 2066 | for (i = 0; i < MAXQUOTAS; i++) { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2067 | if (EXT4_SB(sb)->s_qf_names[i]) { |
| 2068 | int ret = ext4_quota_on_mount(sb, i); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2069 | if (ret < 0) |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 2070 | ext4_msg(sb, KERN_ERR, |
| 2071 | "Cannot turn on journaled " |
| 2072 | "quota: error %d", ret); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2073 | } |
| 2074 | } |
| 2075 | #endif |
| 2076 | |
| 2077 | while (es->s_last_orphan) { |
| 2078 | struct inode *inode; |
| 2079 | |
Josef Bacik | 97bd42b | 2008-04-29 22:04:56 -0400 | [diff] [blame] | 2080 | inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); |
| 2081 | if (IS_ERR(inode)) { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2082 | es->s_last_orphan = 0; |
| 2083 | break; |
| 2084 | } |
| 2085 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2086 | list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); |
Christoph Hellwig | 871a293 | 2010-03-03 09:05:07 -0500 | [diff] [blame] | 2087 | dquot_initialize(inode); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2088 | if (inode->i_nlink) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 2089 | ext4_msg(sb, KERN_DEBUG, |
| 2090 | "%s: truncating inode %lu to %lld bytes", |
Harvey Harrison | 46e665e | 2008-04-17 10:38:59 -0400 | [diff] [blame] | 2091 | __func__, inode->i_ino, inode->i_size); |
Theodore Ts'o | e5f8eab | 2008-09-08 22:25:04 -0400 | [diff] [blame] | 2092 | jbd_debug(2, "truncating inode %lu to %lld bytes\n", |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2093 | inode->i_ino, inode->i_size); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2094 | ext4_truncate(inode); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2095 | nr_truncates++; |
| 2096 | } else { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 2097 | ext4_msg(sb, KERN_DEBUG, |
| 2098 | "%s: deleting unreferenced inode %lu", |
Harvey Harrison | 46e665e | 2008-04-17 10:38:59 -0400 | [diff] [blame] | 2099 | __func__, inode->i_ino); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2100 | jbd_debug(2, "deleting unreferenced inode %lu\n", |
| 2101 | inode->i_ino); |
| 2102 | nr_orphans++; |
| 2103 | } |
| 2104 | iput(inode); /* The delete magic happens here! */ |
| 2105 | } |
| 2106 | |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 2107 | #define PLURAL(x) (x), ((x) == 1) ? "" : "s" |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2108 | |
| 2109 | if (nr_orphans) |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 2110 | ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", |
| 2111 | PLURAL(nr_orphans)); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2112 | if (nr_truncates) |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 2113 | ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", |
| 2114 | PLURAL(nr_truncates)); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2115 | #ifdef CONFIG_QUOTA |
| 2116 | /* Turn quotas off */ |
| 2117 | for (i = 0; i < MAXQUOTAS; i++) { |
| 2118 | if (sb_dqopt(sb)->files[i]) |
Christoph Hellwig | 287a809 | 2010-05-19 07:16:45 -0400 | [diff] [blame] | 2119 | dquot_quota_off(sb, i); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2120 | } |
| 2121 | #endif |
| 2122 | sb->s_flags = s_flags; /* Restore MS_RDONLY status */ |
| 2123 | } |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 2124 | |
Eric Sandeen | cd2291a | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 2125 | /* |
| 2126 | * Maximal extent format file size. |
| 2127 | * Resulting logical blkno at s_maxbytes must fit in our on-disk |
| 2128 | * extent format containers, within a sector_t, and within i_blocks |
| 2129 | * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, |
| 2130 | * so that won't be a limiting factor. |
| 2131 | * |
| 2132 | * Note, this does *not* consider any metadata overhead for vfs i_blocks. |
| 2133 | */ |
Theodore Ts'o | f287a1a | 2008-10-16 22:50:48 -0400 | [diff] [blame] | 2134 | static loff_t ext4_max_size(int blkbits, int has_huge_files) |
Eric Sandeen | cd2291a | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 2135 | { |
| 2136 | loff_t res; |
| 2137 | loff_t upper_limit = MAX_LFS_FILESIZE; |
| 2138 | |
| 2139 | /* small i_blocks in vfs inode? */ |
Theodore Ts'o | f287a1a | 2008-10-16 22:50:48 -0400 | [diff] [blame] | 2140 | if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { |
Eric Sandeen | cd2291a | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 2141 | /* |
Bartlomiej Zolnierkiewicz | 90c699a | 2009-06-19 08:08:50 +0200 | [diff] [blame] | 2142 | * CONFIG_LBDAF is not enabled implies the inode |
Eric Sandeen | cd2291a | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 2143 | * i_block represent total blocks in 512 bytes |
| 2144 | * 32 == size of vfs inode i_blocks * 8 |
| 2145 | */ |
| 2146 | upper_limit = (1LL << 32) - 1; |
| 2147 | |
| 2148 | /* total blocks in file system block size */ |
| 2149 | upper_limit >>= (blkbits - 9); |
| 2150 | upper_limit <<= blkbits; |
| 2151 | } |
| 2152 | |
| 2153 | /* 32-bit extent-start container, ee_block */ |
| 2154 | res = 1LL << 32; |
| 2155 | res <<= blkbits; |
| 2156 | res -= 1; |
| 2157 | |
| 2158 | /* Sanity check against vm- & vfs- imposed limits */ |
| 2159 | if (res > upper_limit) |
| 2160 | res = upper_limit; |
| 2161 | |
| 2162 | return res; |
| 2163 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2164 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2165 | /* |
Eric Sandeen | cd2291a | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 2166 | * 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] | 2167 | * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. |
| 2168 | * 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] | 2169 | */ |
Theodore Ts'o | f287a1a | 2008-10-16 22:50:48 -0400 | [diff] [blame] | 2170 | 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] | 2171 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2172 | loff_t res = EXT4_NDIR_BLOCKS; |
Aneesh Kumar K.V | 0fc1b45 | 2008-01-28 23:58:26 -0500 | [diff] [blame] | 2173 | int meta_blocks; |
| 2174 | loff_t upper_limit; |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 2175 | /* This is calculated to be the largest file size for a dense, block |
| 2176 | * mapped file such that the file's total number of 512-byte sectors, |
| 2177 | * including data and all indirect blocks, does not exceed (2^48 - 1). |
| 2178 | * |
| 2179 | * __u32 i_blocks_lo and _u16 i_blocks_high represent the total |
| 2180 | * number of 512-byte sectors of the file. |
Aneesh Kumar K.V | 0fc1b45 | 2008-01-28 23:58:26 -0500 | [diff] [blame] | 2181 | */ |
| 2182 | |
Theodore Ts'o | f287a1a | 2008-10-16 22:50:48 -0400 | [diff] [blame] | 2183 | if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { |
Aneesh Kumar K.V | 0fc1b45 | 2008-01-28 23:58:26 -0500 | [diff] [blame] | 2184 | /* |
Bartlomiej Zolnierkiewicz | 90c699a | 2009-06-19 08:08:50 +0200 | [diff] [blame] | 2185 | * !has_huge_files or CONFIG_LBDAF not enabled implies that |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 2186 | * the inode i_block field represents total file blocks in |
| 2187 | * 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] | 2188 | */ |
| 2189 | upper_limit = (1LL << 32) - 1; |
| 2190 | |
| 2191 | /* total blocks in file system block size */ |
| 2192 | upper_limit >>= (bits - 9); |
| 2193 | |
| 2194 | } else { |
Aneesh Kumar K.V | 8180a56 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 2195 | /* |
| 2196 | * We use 48 bit ext4_inode i_blocks |
| 2197 | * With EXT4_HUGE_FILE_FL set the i_blocks |
| 2198 | * represent total number of blocks in |
| 2199 | * file system block size |
| 2200 | */ |
Aneesh Kumar K.V | 0fc1b45 | 2008-01-28 23:58:26 -0500 | [diff] [blame] | 2201 | upper_limit = (1LL << 48) - 1; |
| 2202 | |
Aneesh Kumar K.V | 0fc1b45 | 2008-01-28 23:58:26 -0500 | [diff] [blame] | 2203 | } |
| 2204 | |
| 2205 | /* indirect blocks */ |
| 2206 | meta_blocks = 1; |
| 2207 | /* double indirect blocks */ |
| 2208 | meta_blocks += 1 + (1LL << (bits-2)); |
| 2209 | /* tripple indirect blocks */ |
| 2210 | meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); |
| 2211 | |
| 2212 | upper_limit -= meta_blocks; |
| 2213 | upper_limit <<= bits; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2214 | |
| 2215 | res += 1LL << (bits-2); |
| 2216 | res += 1LL << (2*(bits-2)); |
| 2217 | res += 1LL << (3*(bits-2)); |
| 2218 | res <<= bits; |
| 2219 | if (res > upper_limit) |
| 2220 | res = upper_limit; |
Aneesh Kumar K.V | 0fc1b45 | 2008-01-28 23:58:26 -0500 | [diff] [blame] | 2221 | |
| 2222 | if (res > MAX_LFS_FILESIZE) |
| 2223 | res = MAX_LFS_FILESIZE; |
| 2224 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2225 | return res; |
| 2226 | } |
| 2227 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2228 | static ext4_fsblk_t descriptor_loc(struct super_block *sb, |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 2229 | ext4_fsblk_t logical_sb_block, int nr) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2230 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2231 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
Avantika Mathur | fd2d429 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 2232 | ext4_group_t bg, first_meta_bg; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2233 | int has_super = 0; |
| 2234 | |
| 2235 | first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); |
| 2236 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2237 | if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2238 | nr < first_meta_bg) |
Andrew Morton | 70bbb3e | 2006-10-11 01:21:20 -0700 | [diff] [blame] | 2239 | return logical_sb_block + nr + 1; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2240 | bg = sbi->s_desc_per_block * nr; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2241 | if (ext4_bg_has_super(sb, bg)) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2242 | has_super = 1; |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 2243 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2244 | return (has_super + ext4_group_first_block_no(sb, bg)); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2245 | } |
| 2246 | |
Alex Tomas | c9de560 | 2008-01-29 00:19:52 -0500 | [diff] [blame] | 2247 | /** |
| 2248 | * ext4_get_stripe_size: Get the stripe size. |
| 2249 | * @sbi: In memory super block info |
| 2250 | * |
| 2251 | * If we have specified it via mount option, then |
| 2252 | * use the mount option value. If the value specified at mount time is |
| 2253 | * greater than the blocks per group use the super block value. |
| 2254 | * If the super block value is greater than blocks per group return 0. |
| 2255 | * Allocator needs it be less than blocks per group. |
| 2256 | * |
| 2257 | */ |
| 2258 | static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) |
| 2259 | { |
| 2260 | unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); |
| 2261 | unsigned long stripe_width = |
| 2262 | le32_to_cpu(sbi->s_es->s_raid_stripe_width); |
| 2263 | |
| 2264 | if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) |
| 2265 | return sbi->s_stripe; |
| 2266 | |
| 2267 | if (stripe_width <= sbi->s_blocks_per_group) |
| 2268 | return stripe_width; |
| 2269 | |
| 2270 | if (stride <= sbi->s_blocks_per_group) |
| 2271 | return stride; |
| 2272 | |
| 2273 | return 0; |
| 2274 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2275 | |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 2276 | /* sysfs supprt */ |
| 2277 | |
| 2278 | struct ext4_attr { |
| 2279 | struct attribute attr; |
| 2280 | ssize_t (*show)(struct ext4_attr *, struct ext4_sb_info *, char *); |
Theodore Ts'o | 60e6679 | 2010-05-17 07:00:00 -0400 | [diff] [blame] | 2281 | ssize_t (*store)(struct ext4_attr *, struct ext4_sb_info *, |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 2282 | const char *, size_t); |
| 2283 | int offset; |
| 2284 | }; |
| 2285 | |
| 2286 | static int parse_strtoul(const char *buf, |
| 2287 | unsigned long max, unsigned long *value) |
| 2288 | { |
| 2289 | char *endp; |
| 2290 | |
André Goddard Rosa | e7d2860 | 2009-12-14 18:01:06 -0800 | [diff] [blame] | 2291 | *value = simple_strtoul(skip_spaces(buf), &endp, 0); |
| 2292 | endp = skip_spaces(endp); |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 2293 | if (*endp || *value > max) |
| 2294 | return -EINVAL; |
| 2295 | |
| 2296 | return 0; |
| 2297 | } |
| 2298 | |
| 2299 | static ssize_t delayed_allocation_blocks_show(struct ext4_attr *a, |
| 2300 | struct ext4_sb_info *sbi, |
| 2301 | char *buf) |
| 2302 | { |
| 2303 | return snprintf(buf, PAGE_SIZE, "%llu\n", |
| 2304 | (s64) percpu_counter_sum(&sbi->s_dirtyblocks_counter)); |
| 2305 | } |
| 2306 | |
| 2307 | static ssize_t session_write_kbytes_show(struct ext4_attr *a, |
| 2308 | struct ext4_sb_info *sbi, char *buf) |
| 2309 | { |
| 2310 | struct super_block *sb = sbi->s_buddy_cache->i_sb; |
| 2311 | |
Theodore Ts'o | f613dfc | 2010-07-27 11:56:08 -0400 | [diff] [blame] | 2312 | if (!sb->s_bdev->bd_part) |
| 2313 | return snprintf(buf, PAGE_SIZE, "0\n"); |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 2314 | return snprintf(buf, PAGE_SIZE, "%lu\n", |
| 2315 | (part_stat_read(sb->s_bdev->bd_part, sectors[1]) - |
| 2316 | sbi->s_sectors_written_start) >> 1); |
| 2317 | } |
| 2318 | |
| 2319 | static ssize_t lifetime_write_kbytes_show(struct ext4_attr *a, |
| 2320 | struct ext4_sb_info *sbi, char *buf) |
| 2321 | { |
| 2322 | struct super_block *sb = sbi->s_buddy_cache->i_sb; |
| 2323 | |
Theodore Ts'o | f613dfc | 2010-07-27 11:56:08 -0400 | [diff] [blame] | 2324 | if (!sb->s_bdev->bd_part) |
| 2325 | return snprintf(buf, PAGE_SIZE, "0\n"); |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 2326 | return snprintf(buf, PAGE_SIZE, "%llu\n", |
Andrew Morton | a6b43e3 | 2009-12-23 07:48:08 -0500 | [diff] [blame] | 2327 | (unsigned long long)(sbi->s_kbytes_written + |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 2328 | ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - |
Andrew Morton | a6b43e3 | 2009-12-23 07:48:08 -0500 | [diff] [blame] | 2329 | EXT4_SB(sb)->s_sectors_written_start) >> 1))); |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 2330 | } |
| 2331 | |
| 2332 | static ssize_t inode_readahead_blks_store(struct ext4_attr *a, |
| 2333 | struct ext4_sb_info *sbi, |
| 2334 | const char *buf, size_t count) |
| 2335 | { |
| 2336 | unsigned long t; |
| 2337 | |
| 2338 | if (parse_strtoul(buf, 0x40000000, &t)) |
| 2339 | return -EINVAL; |
| 2340 | |
Theodore Ts'o | f7c4395 | 2009-04-24 23:31:59 -0400 | [diff] [blame] | 2341 | if (!is_power_of_2(t)) |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 2342 | return -EINVAL; |
| 2343 | |
| 2344 | sbi->s_inode_readahead_blks = t; |
| 2345 | return count; |
| 2346 | } |
| 2347 | |
| 2348 | static ssize_t sbi_ui_show(struct ext4_attr *a, |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 2349 | struct ext4_sb_info *sbi, char *buf) |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 2350 | { |
| 2351 | unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); |
| 2352 | |
| 2353 | return snprintf(buf, PAGE_SIZE, "%u\n", *ui); |
| 2354 | } |
| 2355 | |
| 2356 | static ssize_t sbi_ui_store(struct ext4_attr *a, |
| 2357 | struct ext4_sb_info *sbi, |
| 2358 | const char *buf, size_t count) |
| 2359 | { |
| 2360 | unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); |
| 2361 | unsigned long t; |
| 2362 | |
| 2363 | if (parse_strtoul(buf, 0xffffffff, &t)) |
| 2364 | return -EINVAL; |
| 2365 | *ui = t; |
| 2366 | return count; |
| 2367 | } |
| 2368 | |
| 2369 | #define EXT4_ATTR_OFFSET(_name,_mode,_show,_store,_elname) \ |
| 2370 | static struct ext4_attr ext4_attr_##_name = { \ |
| 2371 | .attr = {.name = __stringify(_name), .mode = _mode }, \ |
| 2372 | .show = _show, \ |
| 2373 | .store = _store, \ |
| 2374 | .offset = offsetof(struct ext4_sb_info, _elname), \ |
| 2375 | } |
| 2376 | #define EXT4_ATTR(name, mode, show, store) \ |
| 2377 | static struct ext4_attr ext4_attr_##name = __ATTR(name, mode, show, store) |
| 2378 | |
| 2379 | #define EXT4_RO_ATTR(name) EXT4_ATTR(name, 0444, name##_show, NULL) |
| 2380 | #define EXT4_RW_ATTR(name) EXT4_ATTR(name, 0644, name##_show, name##_store) |
| 2381 | #define EXT4_RW_ATTR_SBI_UI(name, elname) \ |
| 2382 | EXT4_ATTR_OFFSET(name, 0644, sbi_ui_show, sbi_ui_store, elname) |
| 2383 | #define ATTR_LIST(name) &ext4_attr_##name.attr |
| 2384 | |
| 2385 | EXT4_RO_ATTR(delayed_allocation_blocks); |
| 2386 | EXT4_RO_ATTR(session_write_kbytes); |
| 2387 | EXT4_RO_ATTR(lifetime_write_kbytes); |
| 2388 | EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, sbi_ui_show, |
| 2389 | inode_readahead_blks_store, s_inode_readahead_blks); |
Andreas Dilger | 1101391 | 2009-06-13 11:45:35 -0400 | [diff] [blame] | 2390 | EXT4_RW_ATTR_SBI_UI(inode_goal, s_inode_goal); |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 2391 | EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats); |
| 2392 | EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan); |
| 2393 | EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan); |
| 2394 | EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs); |
| 2395 | EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request); |
| 2396 | 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] | 2397 | 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] | 2398 | |
| 2399 | static struct attribute *ext4_attrs[] = { |
| 2400 | ATTR_LIST(delayed_allocation_blocks), |
| 2401 | ATTR_LIST(session_write_kbytes), |
| 2402 | ATTR_LIST(lifetime_write_kbytes), |
| 2403 | ATTR_LIST(inode_readahead_blks), |
Andreas Dilger | 1101391 | 2009-06-13 11:45:35 -0400 | [diff] [blame] | 2404 | ATTR_LIST(inode_goal), |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 2405 | ATTR_LIST(mb_stats), |
| 2406 | ATTR_LIST(mb_max_to_scan), |
| 2407 | ATTR_LIST(mb_min_to_scan), |
| 2408 | ATTR_LIST(mb_order2_req), |
| 2409 | ATTR_LIST(mb_stream_req), |
| 2410 | ATTR_LIST(mb_group_prealloc), |
Theodore Ts'o | 55138e0 | 2009-09-29 13:31:31 -0400 | [diff] [blame] | 2411 | ATTR_LIST(max_writeback_mb_bump), |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 2412 | NULL, |
| 2413 | }; |
| 2414 | |
| 2415 | static ssize_t ext4_attr_show(struct kobject *kobj, |
| 2416 | struct attribute *attr, char *buf) |
| 2417 | { |
| 2418 | struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, |
| 2419 | s_kobj); |
| 2420 | struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); |
| 2421 | |
| 2422 | return a->show ? a->show(a, sbi, buf) : 0; |
| 2423 | } |
| 2424 | |
| 2425 | static ssize_t ext4_attr_store(struct kobject *kobj, |
| 2426 | struct attribute *attr, |
| 2427 | const char *buf, size_t len) |
| 2428 | { |
| 2429 | struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, |
| 2430 | s_kobj); |
| 2431 | struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); |
| 2432 | |
| 2433 | return a->store ? a->store(a, sbi, buf, len) : 0; |
| 2434 | } |
| 2435 | |
| 2436 | static void ext4_sb_release(struct kobject *kobj) |
| 2437 | { |
| 2438 | struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, |
| 2439 | s_kobj); |
| 2440 | complete(&sbi->s_kobj_unregister); |
| 2441 | } |
| 2442 | |
| 2443 | |
Emese Revfy | 52cf25d | 2010-01-19 02:58:23 +0100 | [diff] [blame] | 2444 | static const struct sysfs_ops ext4_attr_ops = { |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 2445 | .show = ext4_attr_show, |
| 2446 | .store = ext4_attr_store, |
| 2447 | }; |
| 2448 | |
| 2449 | static struct kobj_type ext4_ktype = { |
| 2450 | .default_attrs = ext4_attrs, |
| 2451 | .sysfs_ops = &ext4_attr_ops, |
| 2452 | .release = ext4_sb_release, |
| 2453 | }; |
| 2454 | |
Eric Sandeen | a13fb1a | 2009-08-18 00:20:23 -0400 | [diff] [blame] | 2455 | /* |
| 2456 | * Check whether this filesystem can be mounted based on |
| 2457 | * the features present and the RDONLY/RDWR mount requested. |
| 2458 | * Returns 1 if this filesystem can be mounted as requested, |
| 2459 | * 0 if it cannot be. |
| 2460 | */ |
| 2461 | static int ext4_feature_set_ok(struct super_block *sb, int readonly) |
| 2462 | { |
| 2463 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP)) { |
| 2464 | ext4_msg(sb, KERN_ERR, |
| 2465 | "Couldn't mount because of " |
| 2466 | "unsupported optional features (%x)", |
| 2467 | (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & |
| 2468 | ~EXT4_FEATURE_INCOMPAT_SUPP)); |
| 2469 | return 0; |
| 2470 | } |
| 2471 | |
| 2472 | if (readonly) |
| 2473 | return 1; |
| 2474 | |
| 2475 | /* Check that feature set is OK for a read-write mount */ |
| 2476 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP)) { |
| 2477 | ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " |
| 2478 | "unsupported optional features (%x)", |
| 2479 | (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & |
| 2480 | ~EXT4_FEATURE_RO_COMPAT_SUPP)); |
| 2481 | return 0; |
| 2482 | } |
| 2483 | /* |
| 2484 | * Large file size enabled file system can only be mounted |
| 2485 | * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF |
| 2486 | */ |
| 2487 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) { |
| 2488 | if (sizeof(blkcnt_t) < sizeof(u64)) { |
| 2489 | ext4_msg(sb, KERN_ERR, "Filesystem with huge files " |
| 2490 | "cannot be mounted RDWR without " |
| 2491 | "CONFIG_LBDAF"); |
| 2492 | return 0; |
| 2493 | } |
| 2494 | } |
| 2495 | return 1; |
| 2496 | } |
| 2497 | |
Theodore Ts'o | 66e61a9 | 2010-07-27 11:56:04 -0400 | [diff] [blame] | 2498 | /* |
| 2499 | * This function is called once a day if we have errors logged |
| 2500 | * on the file system |
| 2501 | */ |
| 2502 | static void print_daily_error_info(unsigned long arg) |
| 2503 | { |
| 2504 | struct super_block *sb = (struct super_block *) arg; |
| 2505 | struct ext4_sb_info *sbi; |
| 2506 | struct ext4_super_block *es; |
| 2507 | |
| 2508 | sbi = EXT4_SB(sb); |
| 2509 | es = sbi->s_es; |
| 2510 | |
| 2511 | if (es->s_error_count) |
| 2512 | ext4_msg(sb, KERN_NOTICE, "error count: %u", |
| 2513 | le32_to_cpu(es->s_error_count)); |
| 2514 | if (es->s_first_error_time) { |
| 2515 | printk(KERN_NOTICE "EXT4-fs (%s): initial error at %u: %.*s:%d", |
| 2516 | sb->s_id, le32_to_cpu(es->s_first_error_time), |
| 2517 | (int) sizeof(es->s_first_error_func), |
| 2518 | es->s_first_error_func, |
| 2519 | le32_to_cpu(es->s_first_error_line)); |
| 2520 | if (es->s_first_error_ino) |
| 2521 | printk(": inode %u", |
| 2522 | le32_to_cpu(es->s_first_error_ino)); |
| 2523 | if (es->s_first_error_block) |
| 2524 | printk(": block %llu", (unsigned long long) |
| 2525 | le64_to_cpu(es->s_first_error_block)); |
| 2526 | printk("\n"); |
| 2527 | } |
| 2528 | if (es->s_last_error_time) { |
| 2529 | printk(KERN_NOTICE "EXT4-fs (%s): last error at %u: %.*s:%d", |
| 2530 | sb->s_id, le32_to_cpu(es->s_last_error_time), |
| 2531 | (int) sizeof(es->s_last_error_func), |
| 2532 | es->s_last_error_func, |
| 2533 | le32_to_cpu(es->s_last_error_line)); |
| 2534 | if (es->s_last_error_ino) |
| 2535 | printk(": inode %u", |
| 2536 | le32_to_cpu(es->s_last_error_ino)); |
| 2537 | if (es->s_last_error_block) |
| 2538 | printk(": block %llu", (unsigned long long) |
| 2539 | le64_to_cpu(es->s_last_error_block)); |
| 2540 | printk("\n"); |
| 2541 | } |
| 2542 | mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ |
| 2543 | } |
| 2544 | |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 2545 | static int ext4_fill_super(struct super_block *sb, void *data, int silent) |
Aneesh Kumar K.V | 7477827 | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 2546 | __releases(kernel_lock) |
| 2547 | __acquires(kernel_lock) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2548 | { |
Curt Wohlgemuth | d4c402d | 2010-05-16 12:00:00 -0400 | [diff] [blame] | 2549 | char *orig_data = kstrdup(data, GFP_KERNEL); |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 2550 | struct buffer_head *bh; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2551 | struct ext4_super_block *es = NULL; |
| 2552 | struct ext4_sb_info *sbi; |
| 2553 | ext4_fsblk_t block; |
| 2554 | ext4_fsblk_t sb_block = get_sb_block(&data); |
Andrew Morton | 70bbb3e | 2006-10-11 01:21:20 -0700 | [diff] [blame] | 2555 | ext4_fsblk_t logical_sb_block; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2556 | unsigned long offset = 0; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2557 | unsigned long journal_devnum = 0; |
| 2558 | unsigned long def_mount_opts; |
| 2559 | struct inode *root; |
Theodore Ts'o | 9f6200b | 2008-09-23 09:18:24 -0400 | [diff] [blame] | 2560 | char *cp; |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 2561 | const char *descr; |
Cyrill Gorcunov | dcc7dae | 2010-07-27 11:56:07 -0400 | [diff] [blame] | 2562 | int ret = -ENOMEM; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2563 | int blocksize; |
Theodore Ts'o | 4ec1102 | 2009-01-06 14:53:26 -0500 | [diff] [blame] | 2564 | unsigned int db_count; |
| 2565 | unsigned int i; |
Theodore Ts'o | f287a1a | 2008-10-16 22:50:48 -0400 | [diff] [blame] | 2566 | int needs_recovery, has_huge_files; |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 2567 | __u64 blocks_count; |
Peter Zijlstra | 833f407 | 2007-10-16 23:25:45 -0700 | [diff] [blame] | 2568 | int err; |
Theodore Ts'o | b3881f7 | 2009-01-05 22:46:26 -0500 | [diff] [blame] | 2569 | unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2570 | |
| 2571 | sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); |
| 2572 | if (!sbi) |
Cyrill Gorcunov | dcc7dae | 2010-07-27 11:56:07 -0400 | [diff] [blame] | 2573 | goto out_free_orig; |
Pekka Enberg | 705895b | 2009-02-15 18:07:52 -0500 | [diff] [blame] | 2574 | |
| 2575 | sbi->s_blockgroup_lock = |
| 2576 | kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); |
| 2577 | if (!sbi->s_blockgroup_lock) { |
| 2578 | kfree(sbi); |
Cyrill Gorcunov | dcc7dae | 2010-07-27 11:56:07 -0400 | [diff] [blame] | 2579 | goto out_free_orig; |
Pekka Enberg | 705895b | 2009-02-15 18:07:52 -0500 | [diff] [blame] | 2580 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2581 | sb->s_fs_info = sbi; |
| 2582 | sbi->s_mount_opt = 0; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2583 | sbi->s_resuid = EXT4_DEF_RESUID; |
| 2584 | sbi->s_resgid = EXT4_DEF_RESGID; |
Theodore Ts'o | 240799c | 2008-10-09 23:53:47 -0400 | [diff] [blame] | 2585 | sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; |
Miklos Szeredi | d9c9bef | 2007-10-16 23:26:27 -0700 | [diff] [blame] | 2586 | sbi->s_sb_block = sb_block; |
Theodore Ts'o | f613dfc | 2010-07-27 11:56:08 -0400 | [diff] [blame] | 2587 | if (sb->s_bdev->bd_part) |
| 2588 | sbi->s_sectors_written_start = |
| 2589 | part_stat_read(sb->s_bdev->bd_part, sectors[1]); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2590 | |
| 2591 | unlock_kernel(); |
| 2592 | |
Theodore Ts'o | 9f6200b | 2008-09-23 09:18:24 -0400 | [diff] [blame] | 2593 | /* Cleanup superblock name */ |
| 2594 | for (cp = sb->s_id; (cp = strchr(cp, '/'));) |
| 2595 | *cp = '!'; |
| 2596 | |
Cyrill Gorcunov | dcc7dae | 2010-07-27 11:56:07 -0400 | [diff] [blame] | 2597 | ret = -EINVAL; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2598 | blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2599 | if (!blocksize) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 2600 | ext4_msg(sb, KERN_ERR, "unable to set blocksize"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2601 | goto out_fail; |
| 2602 | } |
| 2603 | |
| 2604 | /* |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2605 | * The ext4 superblock will not be buffer aligned for other than 1kB |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2606 | * block sizes. We need to calculate the offset from buffer start. |
| 2607 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2608 | if (blocksize != EXT4_MIN_BLOCK_SIZE) { |
Andrew Morton | 70bbb3e | 2006-10-11 01:21:20 -0700 | [diff] [blame] | 2609 | logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; |
| 2610 | offset = do_div(logical_sb_block, blocksize); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2611 | } else { |
Andrew Morton | 70bbb3e | 2006-10-11 01:21:20 -0700 | [diff] [blame] | 2612 | logical_sb_block = sb_block; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2613 | } |
| 2614 | |
Andrew Morton | 70bbb3e | 2006-10-11 01:21:20 -0700 | [diff] [blame] | 2615 | if (!(bh = sb_bread(sb, logical_sb_block))) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 2616 | ext4_msg(sb, KERN_ERR, "unable to read superblock"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2617 | goto out_fail; |
| 2618 | } |
| 2619 | /* |
| 2620 | * Note: s_es must be initialized as soon as possible because |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2621 | * some ext4 macro-instructions depend on its value |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2622 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2623 | es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2624 | sbi->s_es = es; |
| 2625 | sb->s_magic = le16_to_cpu(es->s_magic); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2626 | if (sb->s_magic != EXT4_SUPER_MAGIC) |
| 2627 | goto cantfind_ext4; |
Theodore Ts'o | afc32f7 | 2009-02-28 19:39:58 -0500 | [diff] [blame] | 2628 | sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2629 | |
| 2630 | /* Set defaults before we parse the mount options */ |
| 2631 | def_mount_opts = le32_to_cpu(es->s_default_mount_opts); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2632 | if (def_mount_opts & EXT4_DEFM_DEBUG) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2633 | set_opt(sbi->s_mount_opt, DEBUG); |
Dmitry Monakhov | 437ca0f | 2010-03-01 22:29:21 -0500 | [diff] [blame] | 2634 | if (def_mount_opts & EXT4_DEFM_BSDGROUPS) { |
| 2635 | ext4_msg(sb, KERN_WARNING, deprecated_msg, "bsdgroups", |
| 2636 | "2.6.38"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2637 | set_opt(sbi->s_mount_opt, GRPID); |
Dmitry Monakhov | 437ca0f | 2010-03-01 22:29:21 -0500 | [diff] [blame] | 2638 | } |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2639 | if (def_mount_opts & EXT4_DEFM_UID16) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2640 | set_opt(sbi->s_mount_opt, NO_UID32); |
Theodore Ts'o | 03010a3 | 2008-10-10 20:02:48 -0400 | [diff] [blame] | 2641 | #ifdef CONFIG_EXT4_FS_XATTR |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2642 | if (def_mount_opts & EXT4_DEFM_XATTR_USER) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2643 | set_opt(sbi->s_mount_opt, XATTR_USER); |
Hugh Dickins | 2e7842b | 2007-02-10 01:46:13 -0800 | [diff] [blame] | 2644 | #endif |
Theodore Ts'o | 03010a3 | 2008-10-10 20:02:48 -0400 | [diff] [blame] | 2645 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2646 | if (def_mount_opts & EXT4_DEFM_ACL) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2647 | set_opt(sbi->s_mount_opt, POSIX_ACL); |
Hugh Dickins | 2e7842b | 2007-02-10 01:46:13 -0800 | [diff] [blame] | 2648 | #endif |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2649 | if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) |
Dmitry Monakhov | 482a742 | 2010-02-24 11:35:32 -0500 | [diff] [blame] | 2650 | set_opt(sbi->s_mount_opt, JOURNAL_DATA); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2651 | else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) |
Dmitry Monakhov | 482a742 | 2010-02-24 11:35:32 -0500 | [diff] [blame] | 2652 | set_opt(sbi->s_mount_opt, ORDERED_DATA); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2653 | else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) |
Dmitry Monakhov | 482a742 | 2010-02-24 11:35:32 -0500 | [diff] [blame] | 2654 | set_opt(sbi->s_mount_opt, WRITEBACK_DATA); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2655 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2656 | if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2657 | set_opt(sbi->s_mount_opt, ERRORS_PANIC); |
Aneesh Kumar K.V | bb4f397 | 2008-01-28 23:58:26 -0500 | [diff] [blame] | 2658 | else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) |
Dmitry Mishin | ceea16b | 2006-10-11 01:21:21 -0700 | [diff] [blame] | 2659 | set_opt(sbi->s_mount_opt, ERRORS_CONT); |
Aneesh Kumar K.V | bb4f397 | 2008-01-28 23:58:26 -0500 | [diff] [blame] | 2660 | else |
| 2661 | set_opt(sbi->s_mount_opt, ERRORS_RO); |
Theodore Ts'o | 8b67f04 | 2010-08-01 23:14:20 -0400 | [diff] [blame] | 2662 | if (def_mount_opts & EXT4_DEFM_BLOCK_VALIDITY) |
| 2663 | set_opt(sbi->s_mount_opt, BLOCK_VALIDITY); |
| 2664 | if (def_mount_opts & EXT4_DEFM_DISCARD) |
| 2665 | set_opt(sbi->s_mount_opt, DISCARD); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2666 | |
| 2667 | sbi->s_resuid = le16_to_cpu(es->s_def_resuid); |
| 2668 | sbi->s_resgid = le16_to_cpu(es->s_def_resgid); |
Theodore Ts'o | 3077384 | 2009-01-03 20:27:38 -0500 | [diff] [blame] | 2669 | sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; |
| 2670 | sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; |
| 2671 | sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2672 | |
Theodore Ts'o | 8b67f04 | 2010-08-01 23:14:20 -0400 | [diff] [blame] | 2673 | if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) |
| 2674 | set_opt(sbi->s_mount_opt, BARRIER); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2675 | |
Mingming Cao | 1e2462f | 2007-07-18 09:00:55 -0400 | [diff] [blame] | 2676 | /* |
Aneesh Kumar K.V | dd919b9 | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 2677 | * enable delayed allocation by default |
| 2678 | * Use -o nodelalloc to turn it off |
| 2679 | */ |
Theodore Ts'o | 8b67f04 | 2010-08-01 23:14:20 -0400 | [diff] [blame] | 2680 | if (!IS_EXT3_SB(sb) && |
| 2681 | ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) |
Jan Kara | ba69f9a | 2010-03-24 20:18:37 -0400 | [diff] [blame] | 2682 | set_opt(sbi->s_mount_opt, DELALLOC); |
Aneesh Kumar K.V | dd919b9 | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 2683 | |
Theodore Ts'o | 8b67f04 | 2010-08-01 23:14:20 -0400 | [diff] [blame] | 2684 | if (!parse_options((char *) sbi->s_es->s_mount_opts, sb, |
| 2685 | &journal_devnum, &journal_ioprio, NULL, 0)) { |
| 2686 | ext4_msg(sb, KERN_WARNING, |
| 2687 | "failed to parse options in superblock: %s", |
| 2688 | sbi->s_es->s_mount_opts); |
| 2689 | } |
Theodore Ts'o | b3881f7 | 2009-01-05 22:46:26 -0500 | [diff] [blame] | 2690 | if (!parse_options((char *) data, sb, &journal_devnum, |
| 2691 | &journal_ioprio, NULL, 0)) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2692 | goto failed_mount; |
| 2693 | |
| 2694 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | |
Dmitry Monakhov | 482a742 | 2010-02-24 11:35:32 -0500 | [diff] [blame] | 2695 | (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2696 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2697 | if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && |
| 2698 | (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || |
| 2699 | EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || |
| 2700 | EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 2701 | ext4_msg(sb, KERN_WARNING, |
| 2702 | "feature flags set on rev 0 fs, " |
| 2703 | "running e2fsck is recommended"); |
Theodore Tso | 469108f | 2008-02-10 01:11:44 -0500 | [diff] [blame] | 2704 | |
| 2705 | /* |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2706 | * Check feature flags regardless of the revision level, since we |
| 2707 | * previously didn't change the revision level when setting the flags, |
| 2708 | * so there is a chance incompat flags are set on a rev 0 filesystem. |
| 2709 | */ |
Eric Sandeen | a13fb1a | 2009-08-18 00:20:23 -0400 | [diff] [blame] | 2710 | if (!ext4_feature_set_ok(sb, (sb->s_flags & MS_RDONLY))) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2711 | goto failed_mount; |
Eric Sandeen | a13fb1a | 2009-08-18 00:20:23 -0400 | [diff] [blame] | 2712 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2713 | blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); |
| 2714 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2715 | if (blocksize < EXT4_MIN_BLOCK_SIZE || |
| 2716 | blocksize > EXT4_MAX_BLOCK_SIZE) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 2717 | ext4_msg(sb, KERN_ERR, |
| 2718 | "Unsupported filesystem blocksize %d", blocksize); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2719 | goto failed_mount; |
| 2720 | } |
| 2721 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2722 | if (sb->s_blocksize != blocksize) { |
Aneesh Kumar K.V | ce40733 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 2723 | /* Validate the filesystem blocksize */ |
| 2724 | if (!sb_set_blocksize(sb, blocksize)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 2725 | ext4_msg(sb, KERN_ERR, "bad block size %d", |
Aneesh Kumar K.V | ce40733 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 2726 | blocksize); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2727 | goto failed_mount; |
| 2728 | } |
| 2729 | |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 2730 | brelse(bh); |
Andrew Morton | 70bbb3e | 2006-10-11 01:21:20 -0700 | [diff] [blame] | 2731 | logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; |
| 2732 | offset = do_div(logical_sb_block, blocksize); |
| 2733 | bh = sb_bread(sb, logical_sb_block); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2734 | if (!bh) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 2735 | ext4_msg(sb, KERN_ERR, |
| 2736 | "Can't read superblock on 2nd try"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2737 | goto failed_mount; |
| 2738 | } |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2739 | es = (struct ext4_super_block *)(((char *)bh->b_data) + offset); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2740 | sbi->s_es = es; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2741 | if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 2742 | ext4_msg(sb, KERN_ERR, |
| 2743 | "Magic mismatch, very weird!"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2744 | goto failed_mount; |
| 2745 | } |
| 2746 | } |
| 2747 | |
Eric Sandeen | a13fb1a | 2009-08-18 00:20:23 -0400 | [diff] [blame] | 2748 | has_huge_files = EXT4_HAS_RO_COMPAT_FEATURE(sb, |
| 2749 | EXT4_FEATURE_RO_COMPAT_HUGE_FILE); |
Theodore Ts'o | f287a1a | 2008-10-16 22:50:48 -0400 | [diff] [blame] | 2750 | sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, |
| 2751 | has_huge_files); |
| 2752 | 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] | 2753 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2754 | if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { |
| 2755 | sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; |
| 2756 | sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2757 | } else { |
| 2758 | sbi->s_inode_size = le16_to_cpu(es->s_inode_size); |
| 2759 | sbi->s_first_ino = le32_to_cpu(es->s_first_ino); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2760 | if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || |
Vignesh Babu | 1330593 | 2007-07-18 09:11:02 -0400 | [diff] [blame] | 2761 | (!is_power_of_2(sbi->s_inode_size)) || |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2762 | (sbi->s_inode_size > blocksize)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 2763 | ext4_msg(sb, KERN_ERR, |
| 2764 | "unsupported inode size: %d", |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 2765 | sbi->s_inode_size); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2766 | goto failed_mount; |
| 2767 | } |
Kalpak Shah | ef7f383 | 2007-07-18 09:15:20 -0400 | [diff] [blame] | 2768 | if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) |
| 2769 | sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2770 | } |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 2771 | |
Alexandre Ratchov | 0d1ee42 | 2006-10-11 01:21:14 -0700 | [diff] [blame] | 2772 | sbi->s_desc_size = le16_to_cpu(es->s_desc_size); |
| 2773 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 2774 | if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || |
Alexandre Ratchov | 0d1ee42 | 2006-10-11 01:21:14 -0700 | [diff] [blame] | 2775 | sbi->s_desc_size > EXT4_MAX_DESC_SIZE || |
vignesh babu | d8ea6cf | 2007-10-16 23:27:14 -0700 | [diff] [blame] | 2776 | !is_power_of_2(sbi->s_desc_size)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 2777 | ext4_msg(sb, KERN_ERR, |
| 2778 | "unsupported descriptor size %lu", |
Alexandre Ratchov | 0d1ee42 | 2006-10-11 01:21:14 -0700 | [diff] [blame] | 2779 | sbi->s_desc_size); |
| 2780 | goto failed_mount; |
| 2781 | } |
| 2782 | } else |
| 2783 | sbi->s_desc_size = EXT4_MIN_DESC_SIZE; |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 2784 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2785 | 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] | 2786 | 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] | 2787 | if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2788 | goto cantfind_ext4; |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 2789 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2790 | sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2791 | if (sbi->s_inodes_per_block == 0) |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2792 | goto cantfind_ext4; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2793 | sbi->s_itb_per_group = sbi->s_inodes_per_group / |
| 2794 | sbi->s_inodes_per_block; |
Alexandre Ratchov | 0d1ee42 | 2006-10-11 01:21:14 -0700 | [diff] [blame] | 2795 | sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2796 | sbi->s_sbh = bh; |
| 2797 | sbi->s_mount_state = le16_to_cpu(es->s_state); |
Fengguang Wu | e57aa83 | 2007-10-16 23:26:25 -0700 | [diff] [blame] | 2798 | sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); |
| 2799 | sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 2800 | |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 2801 | for (i = 0; i < 4; i++) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2802 | sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); |
| 2803 | sbi->s_def_hash_version = es->s_def_hash_version; |
Theodore Ts'o | f99b258 | 2008-10-28 13:21:44 -0400 | [diff] [blame] | 2804 | i = le32_to_cpu(es->s_flags); |
| 2805 | if (i & EXT2_FLAGS_UNSIGNED_HASH) |
| 2806 | sbi->s_hash_unsigned = 3; |
| 2807 | else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { |
| 2808 | #ifdef __CHAR_UNSIGNED__ |
| 2809 | es->s_flags |= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); |
| 2810 | sbi->s_hash_unsigned = 3; |
| 2811 | #else |
| 2812 | es->s_flags |= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); |
| 2813 | #endif |
| 2814 | sb->s_dirt = 1; |
| 2815 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2816 | |
| 2817 | if (sbi->s_blocks_per_group > blocksize * 8) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 2818 | ext4_msg(sb, KERN_ERR, |
| 2819 | "#blocks per group too big: %lu", |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 2820 | sbi->s_blocks_per_group); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2821 | goto failed_mount; |
| 2822 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2823 | if (sbi->s_inodes_per_group > blocksize * 8) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 2824 | ext4_msg(sb, KERN_ERR, |
| 2825 | "#inodes per group too big: %lu", |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 2826 | sbi->s_inodes_per_group); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2827 | goto failed_mount; |
| 2828 | } |
| 2829 | |
Eric Sandeen | bf43d84 | 2009-08-17 23:48:51 -0400 | [diff] [blame] | 2830 | /* |
| 2831 | * Test whether we have more sectors than will fit in sector_t, |
| 2832 | * and whether the max offset is addressable by the page cache. |
| 2833 | */ |
| 2834 | if ((ext4_blocks_count(es) > |
| 2835 | (sector_t)(~0ULL) >> (sb->s_blocksize_bits - 9)) || |
| 2836 | (ext4_blocks_count(es) > |
| 2837 | (pgoff_t)(~0ULL) >> (PAGE_CACHE_SHIFT - sb->s_blocksize_bits))) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 2838 | ext4_msg(sb, KERN_ERR, "filesystem" |
Eric Sandeen | bf43d84 | 2009-08-17 23:48:51 -0400 | [diff] [blame] | 2839 | " too large to mount safely on this system"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2840 | if (sizeof(sector_t) < 8) |
Bartlomiej Zolnierkiewicz | 90c699a | 2009-06-19 08:08:50 +0200 | [diff] [blame] | 2841 | ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); |
Eric Sandeen | bf43d84 | 2009-08-17 23:48:51 -0400 | [diff] [blame] | 2842 | ret = -EFBIG; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2843 | goto failed_mount; |
| 2844 | } |
| 2845 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2846 | if (EXT4_BLOCKS_PER_GROUP(sb) == 0) |
| 2847 | goto cantfind_ext4; |
Eric Sandeen | e7c9559 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 2848 | |
From: Thiemo Nagel | 0f2ddca | 2009-04-07 14:07:47 -0400 | [diff] [blame] | 2849 | /* check blocks count against device size */ |
| 2850 | blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; |
| 2851 | if (blocks_count && ext4_blocks_count(es) > blocks_count) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 2852 | ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " |
| 2853 | "exceeds size of device (%llu blocks)", |
From: Thiemo Nagel | 0f2ddca | 2009-04-07 14:07:47 -0400 | [diff] [blame] | 2854 | ext4_blocks_count(es), blocks_count); |
| 2855 | goto failed_mount; |
| 2856 | } |
| 2857 | |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 2858 | /* |
| 2859 | * It makes no sense for the first data block to be beyond the end |
| 2860 | * of the filesystem. |
| 2861 | */ |
| 2862 | if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 2863 | ext4_msg(sb, KERN_WARNING, "bad geometry: first data" |
| 2864 | "block %u is beyond end of filesystem (%llu)", |
| 2865 | le32_to_cpu(es->s_first_data_block), |
| 2866 | ext4_blocks_count(es)); |
Eric Sandeen | e7c9559 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 2867 | goto failed_mount; |
| 2868 | } |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 2869 | blocks_count = (ext4_blocks_count(es) - |
| 2870 | le32_to_cpu(es->s_first_data_block) + |
| 2871 | EXT4_BLOCKS_PER_GROUP(sb) - 1); |
| 2872 | do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); |
Theodore Ts'o | 4ec1102 | 2009-01-06 14:53:26 -0500 | [diff] [blame] | 2873 | if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 2874 | ext4_msg(sb, KERN_WARNING, "groups count too large: %u " |
Theodore Ts'o | 4ec1102 | 2009-01-06 14:53:26 -0500 | [diff] [blame] | 2875 | "(block count %llu, first data block %u, " |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 2876 | "blocks per group %lu)", sbi->s_groups_count, |
Theodore Ts'o | 4ec1102 | 2009-01-06 14:53:26 -0500 | [diff] [blame] | 2877 | ext4_blocks_count(es), |
| 2878 | le32_to_cpu(es->s_first_data_block), |
| 2879 | EXT4_BLOCKS_PER_GROUP(sb)); |
| 2880 | goto failed_mount; |
| 2881 | } |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 2882 | sbi->s_groups_count = blocks_count; |
Eric Sandeen | fb0a387 | 2009-09-16 14:45:10 -0400 | [diff] [blame] | 2883 | sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, |
| 2884 | (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2885 | db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / |
| 2886 | EXT4_DESC_PER_BLOCK(sb); |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 2887 | sbi->s_group_desc = kmalloc(db_count * sizeof(struct buffer_head *), |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2888 | GFP_KERNEL); |
| 2889 | if (sbi->s_group_desc == NULL) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 2890 | ext4_msg(sb, KERN_ERR, "not enough memory"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2891 | goto failed_mount; |
| 2892 | } |
| 2893 | |
Alexander Beregalov | 3244fcb | 2008-10-12 17:27:49 -0400 | [diff] [blame] | 2894 | #ifdef CONFIG_PROC_FS |
Theodore Ts'o | 9f6200b | 2008-09-23 09:18:24 -0400 | [diff] [blame] | 2895 | if (ext4_proc_root) |
| 2896 | sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); |
Alexander Beregalov | 3244fcb | 2008-10-12 17:27:49 -0400 | [diff] [blame] | 2897 | #endif |
Theodore Ts'o | 240799c | 2008-10-09 23:53:47 -0400 | [diff] [blame] | 2898 | |
Pekka Enberg | 705895b | 2009-02-15 18:07:52 -0500 | [diff] [blame] | 2899 | bgl_lock_init(sbi->s_blockgroup_lock); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2900 | |
| 2901 | for (i = 0; i < db_count; i++) { |
Andrew Morton | 70bbb3e | 2006-10-11 01:21:20 -0700 | [diff] [blame] | 2902 | block = descriptor_loc(sb, logical_sb_block, i); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2903 | sbi->s_group_desc[i] = sb_bread(sb, block); |
| 2904 | if (!sbi->s_group_desc[i]) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 2905 | ext4_msg(sb, KERN_ERR, |
| 2906 | "can't read group descriptor %d", i); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2907 | db_count = i; |
| 2908 | goto failed_mount2; |
| 2909 | } |
| 2910 | } |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 2911 | if (!ext4_check_descriptors(sb)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 2912 | ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2913 | goto failed_mount2; |
| 2914 | } |
Jose R. Santos | 772cb7c | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 2915 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) |
| 2916 | if (!ext4_fill_flex_info(sb)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 2917 | ext4_msg(sb, KERN_ERR, |
| 2918 | "unable to initialize " |
| 2919 | "flex_bg meta info!"); |
Jose R. Santos | 772cb7c | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 2920 | goto failed_mount2; |
| 2921 | } |
| 2922 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2923 | sbi->s_gdb_count = db_count; |
| 2924 | get_random_bytes(&sbi->s_next_generation, sizeof(u32)); |
| 2925 | spin_lock_init(&sbi->s_next_gen_lock); |
| 2926 | |
Alex Tomas | c9de560 | 2008-01-29 00:19:52 -0500 | [diff] [blame] | 2927 | sbi->s_stripe = ext4_get_stripe_size(sbi); |
Theodore Ts'o | 55138e0 | 2009-09-29 13:31:31 -0400 | [diff] [blame] | 2928 | sbi->s_max_writeback_mb_bump = 128; |
Alex Tomas | c9de560 | 2008-01-29 00:19:52 -0500 | [diff] [blame] | 2929 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2930 | /* |
| 2931 | * set up enough so that it can read an inode |
| 2932 | */ |
Theodore Ts'o | 9ca9238 | 2009-05-01 12:52:25 -0400 | [diff] [blame] | 2933 | if (!test_opt(sb, NOLOAD) && |
| 2934 | EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) |
| 2935 | sb->s_op = &ext4_sops; |
| 2936 | else |
| 2937 | sb->s_op = &ext4_nojournal_sops; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2938 | sb->s_export_op = &ext4_export_ops; |
| 2939 | sb->s_xattr = ext4_xattr_handlers; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2940 | #ifdef CONFIG_QUOTA |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2941 | sb->s_qcop = &ext4_qctl_operations; |
| 2942 | sb->dq_op = &ext4_quota_operations; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2943 | #endif |
| 2944 | INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ |
Theodore Ts'o | 3b9d4ed | 2009-04-25 22:54:04 -0400 | [diff] [blame] | 2945 | mutex_init(&sbi->s_orphan_lock); |
Theodore Ts'o | 32ed505 | 2009-04-25 22:53:39 -0400 | [diff] [blame] | 2946 | mutex_init(&sbi->s_resize_lock); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2947 | |
| 2948 | sb->s_root = NULL; |
| 2949 | |
| 2950 | needs_recovery = (es->s_last_orphan != 0 || |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2951 | EXT4_HAS_INCOMPAT_FEATURE(sb, |
| 2952 | EXT4_FEATURE_INCOMPAT_RECOVER)); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2953 | |
| 2954 | /* |
| 2955 | * The first inode we look at is the journal inode. Don't try |
| 2956 | * root first: it may be modified in the journal! |
| 2957 | */ |
| 2958 | if (!test_opt(sb, NOLOAD) && |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2959 | EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { |
| 2960 | if (ext4_load_journal(sb, es, journal_devnum)) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2961 | goto failed_mount3; |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 2962 | } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && |
| 2963 | EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 2964 | ext4_msg(sb, KERN_ERR, "required journal recovery " |
| 2965 | "suppressed and not mounted read-only"); |
Jiaying Zhang | 744692d | 2010-03-04 16:14:02 -0500 | [diff] [blame] | 2966 | goto failed_mount_wq; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2967 | } else { |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 2968 | clear_opt(sbi->s_mount_opt, DATA_FLAGS); |
| 2969 | set_opt(sbi->s_mount_opt, WRITEBACK_DATA); |
| 2970 | sbi->s_journal = NULL; |
| 2971 | needs_recovery = 0; |
| 2972 | goto no_journal; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2973 | } |
| 2974 | |
Jose R. Santos | eb40a09 | 2007-07-18 08:37:25 -0400 | [diff] [blame] | 2975 | if (ext4_blocks_count(es) > 0xffffffffULL && |
| 2976 | !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, |
| 2977 | JBD2_FEATURE_INCOMPAT_64BIT)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 2978 | ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); |
Jiaying Zhang | 744692d | 2010-03-04 16:14:02 -0500 | [diff] [blame] | 2979 | goto failed_mount_wq; |
Jose R. Santos | eb40a09 | 2007-07-18 08:37:25 -0400 | [diff] [blame] | 2980 | } |
| 2981 | |
Linus Torvalds | d4da6c9 | 2009-11-02 10:15:27 -0800 | [diff] [blame] | 2982 | if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { |
| 2983 | jbd2_journal_set_features(sbi->s_journal, |
| 2984 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, |
Girish Shilamkar | 818d276 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 2985 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); |
Linus Torvalds | d4da6c9 | 2009-11-02 10:15:27 -0800 | [diff] [blame] | 2986 | } else if (test_opt(sb, JOURNAL_CHECKSUM)) { |
| 2987 | jbd2_journal_set_features(sbi->s_journal, |
| 2988 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, 0); |
Girish Shilamkar | 818d276 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 2989 | jbd2_journal_clear_features(sbi->s_journal, 0, 0, |
| 2990 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); |
Linus Torvalds | d4da6c9 | 2009-11-02 10:15:27 -0800 | [diff] [blame] | 2991 | } else { |
| 2992 | jbd2_journal_clear_features(sbi->s_journal, |
| 2993 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, |
| 2994 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); |
| 2995 | } |
Girish Shilamkar | 818d276 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 2996 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2997 | /* We have now updated the journal if required, so we can |
| 2998 | * validate the data journaling mode. */ |
| 2999 | switch (test_opt(sb, DATA_FLAGS)) { |
| 3000 | case 0: |
| 3001 | /* No mode set, assume a default based on the journal |
Andrew Morton | 63f5793 | 2006-10-11 01:21:24 -0700 | [diff] [blame] | 3002 | * capabilities: ORDERED_DATA if the journal can |
| 3003 | * cope, else JOURNAL_DATA |
| 3004 | */ |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 3005 | if (jbd2_journal_check_available_features |
| 3006 | (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3007 | set_opt(sbi->s_mount_opt, ORDERED_DATA); |
| 3008 | else |
| 3009 | set_opt(sbi->s_mount_opt, JOURNAL_DATA); |
| 3010 | break; |
| 3011 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3012 | case EXT4_MOUNT_ORDERED_DATA: |
| 3013 | case EXT4_MOUNT_WRITEBACK_DATA: |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 3014 | if (!jbd2_journal_check_available_features |
| 3015 | (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3016 | ext4_msg(sb, KERN_ERR, "Journal does not support " |
| 3017 | "requested data journaling mode"); |
Jiaying Zhang | 744692d | 2010-03-04 16:14:02 -0500 | [diff] [blame] | 3018 | goto failed_mount_wq; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3019 | } |
| 3020 | default: |
| 3021 | break; |
| 3022 | } |
Theodore Ts'o | b3881f7 | 2009-01-05 22:46:26 -0500 | [diff] [blame] | 3023 | set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3024 | |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 3025 | no_journal: |
Dmitry Monakhov | 84061e0 | 2010-05-16 08:00:00 -0400 | [diff] [blame] | 3026 | err = percpu_counter_init(&sbi->s_freeblocks_counter, |
| 3027 | ext4_count_free_blocks(sb)); |
| 3028 | if (!err) |
| 3029 | err = percpu_counter_init(&sbi->s_freeinodes_counter, |
| 3030 | ext4_count_free_inodes(sb)); |
| 3031 | if (!err) |
| 3032 | err = percpu_counter_init(&sbi->s_dirs_counter, |
| 3033 | ext4_count_dirs(sb)); |
| 3034 | if (!err) |
| 3035 | err = percpu_counter_init(&sbi->s_dirtyblocks_counter, 0); |
| 3036 | if (err) { |
| 3037 | ext4_msg(sb, KERN_ERR, "insufficient memory"); |
| 3038 | goto failed_mount_wq; |
| 3039 | } |
Christoph Hellwig | 206f7ab | 2010-06-14 14:42:49 -0400 | [diff] [blame] | 3040 | |
Mingming Cao | 4c0425f | 2009-09-28 15:48:41 -0400 | [diff] [blame] | 3041 | EXT4_SB(sb)->dio_unwritten_wq = create_workqueue("ext4-dio-unwritten"); |
| 3042 | if (!EXT4_SB(sb)->dio_unwritten_wq) { |
| 3043 | printk(KERN_ERR "EXT4-fs: failed to create DIO workqueue\n"); |
| 3044 | goto failed_mount_wq; |
| 3045 | } |
| 3046 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3047 | /* |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 3048 | * The jbd2_journal_load will have done any necessary log recovery, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3049 | * so we can safely mount the rest of the filesystem now. |
| 3050 | */ |
| 3051 | |
David Howells | 1d1fe1e | 2008-02-07 00:15:37 -0800 | [diff] [blame] | 3052 | root = ext4_iget(sb, EXT4_ROOT_INO); |
| 3053 | if (IS_ERR(root)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3054 | ext4_msg(sb, KERN_ERR, "get root inode failed"); |
David Howells | 1d1fe1e | 2008-02-07 00:15:37 -0800 | [diff] [blame] | 3055 | ret = PTR_ERR(root); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3056 | goto failed_mount4; |
| 3057 | } |
| 3058 | if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { |
David Howells | 1d1fe1e | 2008-02-07 00:15:37 -0800 | [diff] [blame] | 3059 | iput(root); |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3060 | ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3061 | goto failed_mount4; |
| 3062 | } |
David Howells | 1d1fe1e | 2008-02-07 00:15:37 -0800 | [diff] [blame] | 3063 | sb->s_root = d_alloc_root(root); |
| 3064 | if (!sb->s_root) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3065 | ext4_msg(sb, KERN_ERR, "get root dentry failed"); |
David Howells | 1d1fe1e | 2008-02-07 00:15:37 -0800 | [diff] [blame] | 3066 | iput(root); |
| 3067 | ret = -ENOMEM; |
| 3068 | goto failed_mount4; |
| 3069 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3070 | |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 3071 | ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY); |
Kalpak Shah | ef7f383 | 2007-07-18 09:15:20 -0400 | [diff] [blame] | 3072 | |
| 3073 | /* determine the minimum size of new large inodes, if present */ |
| 3074 | if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { |
| 3075 | sbi->s_want_extra_isize = sizeof(struct ext4_inode) - |
| 3076 | EXT4_GOOD_OLD_INODE_SIZE; |
| 3077 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, |
| 3078 | EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { |
| 3079 | if (sbi->s_want_extra_isize < |
| 3080 | le16_to_cpu(es->s_want_extra_isize)) |
| 3081 | sbi->s_want_extra_isize = |
| 3082 | le16_to_cpu(es->s_want_extra_isize); |
| 3083 | if (sbi->s_want_extra_isize < |
| 3084 | le16_to_cpu(es->s_min_extra_isize)) |
| 3085 | sbi->s_want_extra_isize = |
| 3086 | le16_to_cpu(es->s_min_extra_isize); |
| 3087 | } |
| 3088 | } |
| 3089 | /* Check if enough inode space is available */ |
| 3090 | if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > |
| 3091 | sbi->s_inode_size) { |
| 3092 | sbi->s_want_extra_isize = sizeof(struct ext4_inode) - |
| 3093 | EXT4_GOOD_OLD_INODE_SIZE; |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3094 | ext4_msg(sb, KERN_INFO, "required extra inode space not" |
| 3095 | "available"); |
Kalpak Shah | ef7f383 | 2007-07-18 09:15:20 -0400 | [diff] [blame] | 3096 | } |
| 3097 | |
Theodore Ts'o | 90576c0 | 2009-09-29 15:51:30 -0400 | [diff] [blame] | 3098 | if (test_opt(sb, DELALLOC) && |
| 3099 | (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3100 | ext4_msg(sb, KERN_WARNING, "Ignoring delalloc option - " |
| 3101 | "requested data journaling mode"); |
Aneesh Kumar K.V | c2774d8 | 2008-10-10 20:07:20 -0400 | [diff] [blame] | 3102 | clear_opt(sbi->s_mount_opt, DELALLOC); |
Theodore Ts'o | 90576c0 | 2009-09-29 15:51:30 -0400 | [diff] [blame] | 3103 | } |
Jiaying Zhang | 744692d | 2010-03-04 16:14:02 -0500 | [diff] [blame] | 3104 | if (test_opt(sb, DIOREAD_NOLOCK)) { |
| 3105 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { |
| 3106 | ext4_msg(sb, KERN_WARNING, "Ignoring dioread_nolock " |
| 3107 | "option - requested data journaling mode"); |
| 3108 | clear_opt(sbi->s_mount_opt, DIOREAD_NOLOCK); |
| 3109 | } |
| 3110 | if (sb->s_blocksize < PAGE_SIZE) { |
| 3111 | ext4_msg(sb, KERN_WARNING, "Ignoring dioread_nolock " |
| 3112 | "option - block size is too small"); |
| 3113 | clear_opt(sbi->s_mount_opt, DIOREAD_NOLOCK); |
| 3114 | } |
| 3115 | } |
Aneesh Kumar K.V | c2774d8 | 2008-10-10 20:07:20 -0400 | [diff] [blame] | 3116 | |
Theodore Ts'o | 6fd058f | 2009-05-17 15:38:01 -0400 | [diff] [blame] | 3117 | err = ext4_setup_system_zone(sb); |
| 3118 | if (err) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3119 | ext4_msg(sb, KERN_ERR, "failed to initialize system " |
Curt Wohlgemuth | fbe845d | 2010-05-16 13:00:00 -0400 | [diff] [blame] | 3120 | "zone (%d)", err); |
Theodore Ts'o | 6fd058f | 2009-05-17 15:38:01 -0400 | [diff] [blame] | 3121 | goto failed_mount4; |
| 3122 | } |
| 3123 | |
Aneesh Kumar K.V | c2774d8 | 2008-10-10 20:07:20 -0400 | [diff] [blame] | 3124 | ext4_ext_init(sb); |
| 3125 | err = ext4_mb_init(sb, needs_recovery); |
| 3126 | if (err) { |
Uwe Kleine-König | 421f91d | 2010-06-11 12:17:00 +0200 | [diff] [blame] | 3127 | ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3128 | err); |
Aneesh Kumar K.V | c2774d8 | 2008-10-10 20:07:20 -0400 | [diff] [blame] | 3129 | goto failed_mount4; |
| 3130 | } |
| 3131 | |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 3132 | sbi->s_kobj.kset = ext4_kset; |
| 3133 | init_completion(&sbi->s_kobj_unregister); |
| 3134 | err = kobject_init_and_add(&sbi->s_kobj, &ext4_ktype, NULL, |
| 3135 | "%s", sb->s_id); |
| 3136 | if (err) { |
| 3137 | ext4_mb_release(sb); |
| 3138 | ext4_ext_release(sb); |
| 3139 | goto failed_mount4; |
| 3140 | }; |
| 3141 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3142 | EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; |
| 3143 | ext4_orphan_cleanup(sb, es); |
| 3144 | EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 3145 | if (needs_recovery) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3146 | ext4_msg(sb, KERN_INFO, "recovery complete"); |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 3147 | ext4_mark_recovery_complete(sb, es); |
| 3148 | } |
| 3149 | if (EXT4_SB(sb)->s_journal) { |
| 3150 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) |
| 3151 | descr = " journalled data mode"; |
| 3152 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) |
| 3153 | descr = " ordered data mode"; |
| 3154 | else |
| 3155 | descr = " writeback data mode"; |
| 3156 | } else |
| 3157 | descr = "out journal"; |
| 3158 | |
Curt Wohlgemuth | d4c402d | 2010-05-16 12:00:00 -0400 | [diff] [blame] | 3159 | ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " |
Theodore Ts'o | 8b67f04 | 2010-08-01 23:14:20 -0400 | [diff] [blame] | 3160 | "Opts: %s%s%s", descr, sbi->s_es->s_mount_opts, |
| 3161 | *sbi->s_es->s_mount_opts ? "; " : "", orig_data); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3162 | |
Theodore Ts'o | 66e61a9 | 2010-07-27 11:56:04 -0400 | [diff] [blame] | 3163 | init_timer(&sbi->s_err_report); |
| 3164 | sbi->s_err_report.function = print_daily_error_info; |
| 3165 | sbi->s_err_report.data = (unsigned long) sb; |
| 3166 | if (es->s_error_count) |
| 3167 | mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3168 | |
| 3169 | lock_kernel(); |
Curt Wohlgemuth | d4c402d | 2010-05-16 12:00:00 -0400 | [diff] [blame] | 3170 | kfree(orig_data); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3171 | return 0; |
| 3172 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3173 | cantfind_ext4: |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3174 | if (!silent) |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3175 | ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3176 | goto failed_mount; |
| 3177 | |
| 3178 | failed_mount4: |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3179 | ext4_msg(sb, KERN_ERR, "mount failed"); |
Mingming Cao | 4c0425f | 2009-09-28 15:48:41 -0400 | [diff] [blame] | 3180 | destroy_workqueue(EXT4_SB(sb)->dio_unwritten_wq); |
| 3181 | failed_mount_wq: |
Theodore Ts'o | 6fd058f | 2009-05-17 15:38:01 -0400 | [diff] [blame] | 3182 | ext4_release_system_zone(sb); |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 3183 | if (sbi->s_journal) { |
| 3184 | jbd2_journal_destroy(sbi->s_journal); |
| 3185 | sbi->s_journal = NULL; |
| 3186 | } |
Dmitry Monakhov | 84061e0 | 2010-05-16 08:00:00 -0400 | [diff] [blame] | 3187 | percpu_counter_destroy(&sbi->s_freeblocks_counter); |
| 3188 | percpu_counter_destroy(&sbi->s_freeinodes_counter); |
| 3189 | percpu_counter_destroy(&sbi->s_dirs_counter); |
| 3190 | percpu_counter_destroy(&sbi->s_dirtyblocks_counter); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3191 | failed_mount3: |
Theodore Ts'o | c5ca7c7 | 2009-04-27 22:48:48 -0400 | [diff] [blame] | 3192 | if (sbi->s_flex_groups) { |
| 3193 | if (is_vmalloc_addr(sbi->s_flex_groups)) |
| 3194 | vfree(sbi->s_flex_groups); |
| 3195 | else |
| 3196 | kfree(sbi->s_flex_groups); |
| 3197 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3198 | failed_mount2: |
| 3199 | for (i = 0; i < db_count; i++) |
| 3200 | brelse(sbi->s_group_desc[i]); |
| 3201 | kfree(sbi->s_group_desc); |
| 3202 | failed_mount: |
Theodore Ts'o | 240799c | 2008-10-09 23:53:47 -0400 | [diff] [blame] | 3203 | if (sbi->s_proc) { |
Theodore Ts'o | 9f6200b | 2008-09-23 09:18:24 -0400 | [diff] [blame] | 3204 | remove_proc_entry(sb->s_id, ext4_proc_root); |
Theodore Ts'o | 240799c | 2008-10-09 23:53:47 -0400 | [diff] [blame] | 3205 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3206 | #ifdef CONFIG_QUOTA |
| 3207 | for (i = 0; i < MAXQUOTAS; i++) |
| 3208 | kfree(sbi->s_qf_names[i]); |
| 3209 | #endif |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3210 | ext4_blkdev_remove(sbi); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3211 | brelse(bh); |
| 3212 | out_fail: |
| 3213 | sb->s_fs_info = NULL; |
Manish Katiyar | f683016 | 2009-05-17 23:52:44 -0400 | [diff] [blame] | 3214 | kfree(sbi->s_blockgroup_lock); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3215 | kfree(sbi); |
| 3216 | lock_kernel(); |
Cyrill Gorcunov | dcc7dae | 2010-07-27 11:56:07 -0400 | [diff] [blame] | 3217 | out_free_orig: |
Curt Wohlgemuth | d4c402d | 2010-05-16 12:00:00 -0400 | [diff] [blame] | 3218 | kfree(orig_data); |
David Howells | 1d1fe1e | 2008-02-07 00:15:37 -0800 | [diff] [blame] | 3219 | return ret; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3220 | } |
| 3221 | |
| 3222 | /* |
| 3223 | * Setup any per-fs journal parameters now. We'll do this both on |
| 3224 | * initial mount, once the journal has been initialised but before we've |
| 3225 | * done any recovery; and again on any subsequent remount. |
| 3226 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3227 | 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] | 3228 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3229 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3230 | |
Theodore Ts'o | 3077384 | 2009-01-03 20:27:38 -0500 | [diff] [blame] | 3231 | journal->j_commit_interval = sbi->s_commit_interval; |
| 3232 | journal->j_min_batch_time = sbi->s_min_batch_time; |
| 3233 | journal->j_max_batch_time = sbi->s_max_batch_time; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3234 | |
Theodore Ts'o | a931da6 | 2010-08-03 21:35:12 -0400 | [diff] [blame] | 3235 | write_lock(&journal->j_state_lock); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3236 | if (test_opt(sb, BARRIER)) |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 3237 | journal->j_flags |= JBD2_BARRIER; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3238 | else |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 3239 | journal->j_flags &= ~JBD2_BARRIER; |
Hidehiro Kawai | 5bf5683 | 2008-10-10 22:12:43 -0400 | [diff] [blame] | 3240 | if (test_opt(sb, DATA_ERR_ABORT)) |
| 3241 | journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; |
| 3242 | else |
| 3243 | journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; |
Theodore Ts'o | a931da6 | 2010-08-03 21:35:12 -0400 | [diff] [blame] | 3244 | write_unlock(&journal->j_state_lock); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3245 | } |
| 3246 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3247 | static journal_t *ext4_get_journal(struct super_block *sb, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3248 | unsigned int journal_inum) |
| 3249 | { |
| 3250 | struct inode *journal_inode; |
| 3251 | journal_t *journal; |
| 3252 | |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 3253 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
| 3254 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3255 | /* First, test for the existence of a valid inode on disk. Bad |
| 3256 | * things happen if we iget() an unused inode, as the subsequent |
| 3257 | * iput() will try to delete it. */ |
| 3258 | |
David Howells | 1d1fe1e | 2008-02-07 00:15:37 -0800 | [diff] [blame] | 3259 | journal_inode = ext4_iget(sb, journal_inum); |
| 3260 | if (IS_ERR(journal_inode)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3261 | ext4_msg(sb, KERN_ERR, "no journal found"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3262 | return NULL; |
| 3263 | } |
| 3264 | if (!journal_inode->i_nlink) { |
| 3265 | make_bad_inode(journal_inode); |
| 3266 | iput(journal_inode); |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3267 | ext4_msg(sb, KERN_ERR, "journal inode is deleted"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3268 | return NULL; |
| 3269 | } |
| 3270 | |
Theodore Ts'o | e5f8eab | 2008-09-08 22:25:04 -0400 | [diff] [blame] | 3271 | jbd_debug(2, "Journal inode found at %p: %lld bytes\n", |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3272 | journal_inode, journal_inode->i_size); |
David Howells | 1d1fe1e | 2008-02-07 00:15:37 -0800 | [diff] [blame] | 3273 | if (!S_ISREG(journal_inode->i_mode)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3274 | ext4_msg(sb, KERN_ERR, "invalid journal inode"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3275 | iput(journal_inode); |
| 3276 | return NULL; |
| 3277 | } |
| 3278 | |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 3279 | journal = jbd2_journal_init_inode(journal_inode); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3280 | if (!journal) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3281 | ext4_msg(sb, KERN_ERR, "Could not load journal inode"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3282 | iput(journal_inode); |
| 3283 | return NULL; |
| 3284 | } |
| 3285 | journal->j_private = sb; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3286 | ext4_init_journal_params(sb, journal); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3287 | return journal; |
| 3288 | } |
| 3289 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3290 | static journal_t *ext4_get_dev_journal(struct super_block *sb, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3291 | dev_t j_dev) |
| 3292 | { |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 3293 | struct buffer_head *bh; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3294 | journal_t *journal; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3295 | ext4_fsblk_t start; |
| 3296 | ext4_fsblk_t len; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3297 | int hblock, blocksize; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3298 | ext4_fsblk_t sb_block; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3299 | unsigned long offset; |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 3300 | struct ext4_super_block *es; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3301 | struct block_device *bdev; |
| 3302 | |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 3303 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
| 3304 | |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3305 | bdev = ext4_blkdev_get(j_dev, sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3306 | if (bdev == NULL) |
| 3307 | return NULL; |
| 3308 | |
| 3309 | if (bd_claim(bdev, sb)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3310 | ext4_msg(sb, KERN_ERR, |
| 3311 | "failed to claim external journal device"); |
Al Viro | 9a1c354 | 2008-02-22 20:40:24 -0500 | [diff] [blame] | 3312 | blkdev_put(bdev, FMODE_READ|FMODE_WRITE); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3313 | return NULL; |
| 3314 | } |
| 3315 | |
| 3316 | blocksize = sb->s_blocksize; |
Martin K. Petersen | e1defc4 | 2009-05-22 17:17:49 -0400 | [diff] [blame] | 3317 | hblock = bdev_logical_block_size(bdev); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3318 | if (blocksize < hblock) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3319 | ext4_msg(sb, KERN_ERR, |
| 3320 | "blocksize too small for journal device"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3321 | goto out_bdev; |
| 3322 | } |
| 3323 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3324 | sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; |
| 3325 | offset = EXT4_MIN_BLOCK_SIZE % blocksize; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3326 | set_blocksize(bdev, blocksize); |
| 3327 | if (!(bh = __bread(bdev, sb_block, blocksize))) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3328 | ext4_msg(sb, KERN_ERR, "couldn't read superblock of " |
| 3329 | "external journal"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3330 | goto out_bdev; |
| 3331 | } |
| 3332 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3333 | es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); |
| 3334 | if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3335 | !(le32_to_cpu(es->s_feature_incompat) & |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3336 | EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3337 | ext4_msg(sb, KERN_ERR, "external journal has " |
| 3338 | "bad superblock"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3339 | brelse(bh); |
| 3340 | goto out_bdev; |
| 3341 | } |
| 3342 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3343 | 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] | 3344 | ext4_msg(sb, KERN_ERR, "journal UUID does not match"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3345 | brelse(bh); |
| 3346 | goto out_bdev; |
| 3347 | } |
| 3348 | |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 3349 | len = ext4_blocks_count(es); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3350 | start = sb_block + 1; |
| 3351 | brelse(bh); /* we're done with the superblock */ |
| 3352 | |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 3353 | journal = jbd2_journal_init_dev(bdev, sb->s_bdev, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3354 | start, len, blocksize); |
| 3355 | if (!journal) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3356 | ext4_msg(sb, KERN_ERR, "failed to create device journal"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3357 | goto out_bdev; |
| 3358 | } |
| 3359 | journal->j_private = sb; |
| 3360 | ll_rw_block(READ, 1, &journal->j_sb_buffer); |
| 3361 | wait_on_buffer(journal->j_sb_buffer); |
| 3362 | if (!buffer_uptodate(journal->j_sb_buffer)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3363 | ext4_msg(sb, KERN_ERR, "I/O error on journal device"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3364 | goto out_journal; |
| 3365 | } |
| 3366 | if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3367 | ext4_msg(sb, KERN_ERR, "External journal has more than one " |
| 3368 | "user (unsupported) - %d", |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3369 | be32_to_cpu(journal->j_superblock->s_nr_users)); |
| 3370 | goto out_journal; |
| 3371 | } |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3372 | EXT4_SB(sb)->journal_bdev = bdev; |
| 3373 | ext4_init_journal_params(sb, journal); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3374 | return journal; |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 3375 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3376 | out_journal: |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 3377 | jbd2_journal_destroy(journal); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3378 | out_bdev: |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3379 | ext4_blkdev_put(bdev); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3380 | return NULL; |
| 3381 | } |
| 3382 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3383 | static int ext4_load_journal(struct super_block *sb, |
| 3384 | struct ext4_super_block *es, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3385 | unsigned long journal_devnum) |
| 3386 | { |
| 3387 | journal_t *journal; |
| 3388 | unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); |
| 3389 | dev_t journal_dev; |
| 3390 | int err = 0; |
| 3391 | int really_read_only; |
| 3392 | |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 3393 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
| 3394 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3395 | if (journal_devnum && |
| 3396 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3397 | ext4_msg(sb, KERN_INFO, "external journal device major/minor " |
| 3398 | "numbers have changed"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3399 | journal_dev = new_decode_dev(journal_devnum); |
| 3400 | } else |
| 3401 | journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); |
| 3402 | |
| 3403 | really_read_only = bdev_read_only(sb->s_bdev); |
| 3404 | |
| 3405 | /* |
| 3406 | * Are we loading a blank journal or performing recovery after a |
| 3407 | * crash? For recovery, we need to check in advance whether we |
| 3408 | * can get read-write access to the device. |
| 3409 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3410 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3411 | if (sb->s_flags & MS_RDONLY) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3412 | ext4_msg(sb, KERN_INFO, "INFO: recovery " |
| 3413 | "required on readonly filesystem"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3414 | if (really_read_only) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3415 | ext4_msg(sb, KERN_ERR, "write access " |
| 3416 | "unavailable, cannot proceed"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3417 | return -EROFS; |
| 3418 | } |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3419 | ext4_msg(sb, KERN_INFO, "write access will " |
| 3420 | "be enabled during recovery"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3421 | } |
| 3422 | } |
| 3423 | |
| 3424 | if (journal_inum && journal_dev) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3425 | ext4_msg(sb, KERN_ERR, "filesystem has both journal " |
| 3426 | "and inode journals!"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3427 | return -EINVAL; |
| 3428 | } |
| 3429 | |
| 3430 | if (journal_inum) { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3431 | if (!(journal = ext4_get_journal(sb, journal_inum))) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3432 | return -EINVAL; |
| 3433 | } else { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3434 | if (!(journal = ext4_get_dev_journal(sb, journal_dev))) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3435 | return -EINVAL; |
| 3436 | } |
| 3437 | |
Theodore Ts'o | 90576c0 | 2009-09-29 15:51:30 -0400 | [diff] [blame] | 3438 | if (!(journal->j_flags & JBD2_BARRIER)) |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3439 | ext4_msg(sb, KERN_INFO, "barriers disabled"); |
Theodore Ts'o | 4776004 | 2008-09-08 23:00:52 -0400 | [diff] [blame] | 3440 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3441 | if (!really_read_only && test_opt(sb, UPDATE_JOURNAL)) { |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 3442 | err = jbd2_journal_update_format(journal); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3443 | if (err) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3444 | ext4_msg(sb, KERN_ERR, "error updating journal"); |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 3445 | jbd2_journal_destroy(journal); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3446 | return err; |
| 3447 | } |
| 3448 | } |
| 3449 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3450 | if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 3451 | err = jbd2_journal_wipe(journal, !really_read_only); |
Theodore Ts'o | 1c13d5c | 2010-07-27 11:56:03 -0400 | [diff] [blame] | 3452 | if (!err) { |
| 3453 | char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); |
| 3454 | if (save) |
| 3455 | memcpy(save, ((char *) es) + |
| 3456 | EXT4_S_ERR_START, EXT4_S_ERR_LEN); |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 3457 | err = jbd2_journal_load(journal); |
Theodore Ts'o | 1c13d5c | 2010-07-27 11:56:03 -0400 | [diff] [blame] | 3458 | if (save) |
| 3459 | memcpy(((char *) es) + EXT4_S_ERR_START, |
| 3460 | save, EXT4_S_ERR_LEN); |
| 3461 | kfree(save); |
| 3462 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3463 | |
| 3464 | if (err) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3465 | ext4_msg(sb, KERN_ERR, "error loading journal"); |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 3466 | jbd2_journal_destroy(journal); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3467 | return err; |
| 3468 | } |
| 3469 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3470 | EXT4_SB(sb)->s_journal = journal; |
| 3471 | ext4_clear_journal_err(sb, es); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3472 | |
| 3473 | if (journal_devnum && |
| 3474 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { |
| 3475 | es->s_journal_dev = cpu_to_le32(journal_devnum); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3476 | |
| 3477 | /* Make sure we flush the recovery flag to disk. */ |
Theodore Ts'o | e2d6705 | 2009-05-01 00:33:44 -0400 | [diff] [blame] | 3478 | ext4_commit_super(sb, 1); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3479 | } |
| 3480 | |
| 3481 | return 0; |
| 3482 | } |
| 3483 | |
Theodore Ts'o | e2d6705 | 2009-05-01 00:33:44 -0400 | [diff] [blame] | 3484 | static int ext4_commit_super(struct super_block *sb, int sync) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3485 | { |
Theodore Ts'o | e2d6705 | 2009-05-01 00:33:44 -0400 | [diff] [blame] | 3486 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3487 | struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; |
Takashi Sato | c4be0c1 | 2009-01-09 16:40:58 -0800 | [diff] [blame] | 3488 | int error = 0; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3489 | |
| 3490 | if (!sbh) |
Takashi Sato | c4be0c1 | 2009-01-09 16:40:58 -0800 | [diff] [blame] | 3491 | return error; |
Theodore Ts'o | 914258b | 2008-10-06 21:35:40 -0400 | [diff] [blame] | 3492 | if (buffer_write_io_error(sbh)) { |
| 3493 | /* |
| 3494 | * Oh, dear. A previous attempt to write the |
| 3495 | * superblock failed. This could happen because the |
| 3496 | * USB device was yanked out. Or it could happen to |
| 3497 | * be a transient write error and maybe the block will |
| 3498 | * be remapped. Nothing we can do but to retry the |
| 3499 | * write and hope for the best. |
| 3500 | */ |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3501 | ext4_msg(sb, KERN_ERR, "previous I/O error to " |
| 3502 | "superblock detected"); |
Theodore Ts'o | 914258b | 2008-10-06 21:35:40 -0400 | [diff] [blame] | 3503 | clear_buffer_write_io_error(sbh); |
| 3504 | set_buffer_uptodate(sbh); |
| 3505 | } |
Theodore Ts'o | 71290b3 | 2009-09-10 17:31:04 -0400 | [diff] [blame] | 3506 | /* |
| 3507 | * If the file system is mounted read-only, don't update the |
| 3508 | * superblock write time. This avoids updating the superblock |
| 3509 | * write time when we are mounting the root file system |
| 3510 | * read/only but we need to replay the journal; at that point, |
| 3511 | * for people who are east of GMT and who make their clock |
| 3512 | * tick in localtime for Windows bug-for-bug compatibility, |
| 3513 | * the clock is set in the future, and this will cause e2fsck |
| 3514 | * to complain and force a full file system check. |
| 3515 | */ |
| 3516 | if (!(sb->s_flags & MS_RDONLY)) |
| 3517 | es->s_wtime = cpu_to_le32(get_seconds()); |
Theodore Ts'o | f613dfc | 2010-07-27 11:56:08 -0400 | [diff] [blame] | 3518 | if (sb->s_bdev->bd_part) |
| 3519 | es->s_kbytes_written = |
| 3520 | cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + |
Theodore Ts'o | afc32f7 | 2009-02-28 19:39:58 -0500 | [diff] [blame] | 3521 | ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - |
| 3522 | EXT4_SB(sb)->s_sectors_written_start) >> 1)); |
Theodore Ts'o | f613dfc | 2010-07-27 11:56:08 -0400 | [diff] [blame] | 3523 | else |
| 3524 | es->s_kbytes_written = |
| 3525 | cpu_to_le64(EXT4_SB(sb)->s_kbytes_written); |
Aneesh Kumar K.V | 5d1b1b3 | 2009-01-05 22:19:52 -0500 | [diff] [blame] | 3526 | ext4_free_blocks_count_set(es, percpu_counter_sum_positive( |
| 3527 | &EXT4_SB(sb)->s_freeblocks_counter)); |
| 3528 | es->s_free_inodes_count = cpu_to_le32(percpu_counter_sum_positive( |
| 3529 | &EXT4_SB(sb)->s_freeinodes_counter)); |
Theodore Ts'o | 7234ab2 | 2009-04-30 21:24:04 -0400 | [diff] [blame] | 3530 | sb->s_dirt = 0; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3531 | BUFFER_TRACE(sbh, "marking dirty"); |
| 3532 | mark_buffer_dirty(sbh); |
Theodore Ts'o | 914258b | 2008-10-06 21:35:40 -0400 | [diff] [blame] | 3533 | if (sync) { |
Takashi Sato | c4be0c1 | 2009-01-09 16:40:58 -0800 | [diff] [blame] | 3534 | error = sync_dirty_buffer(sbh); |
| 3535 | if (error) |
| 3536 | return error; |
| 3537 | |
| 3538 | error = buffer_write_io_error(sbh); |
| 3539 | if (error) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3540 | ext4_msg(sb, KERN_ERR, "I/O error while writing " |
| 3541 | "superblock"); |
Theodore Ts'o | 914258b | 2008-10-06 21:35:40 -0400 | [diff] [blame] | 3542 | clear_buffer_write_io_error(sbh); |
| 3543 | set_buffer_uptodate(sbh); |
| 3544 | } |
| 3545 | } |
Takashi Sato | c4be0c1 | 2009-01-09 16:40:58 -0800 | [diff] [blame] | 3546 | return error; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3547 | } |
| 3548 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3549 | /* |
| 3550 | * Have we just finished recovery? If so, and if we are mounting (or |
| 3551 | * remounting) the filesystem readonly, then we will end up with a |
| 3552 | * consistent fs on disk. Record that fact. |
| 3553 | */ |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 3554 | static void ext4_mark_recovery_complete(struct super_block *sb, |
| 3555 | struct ext4_super_block *es) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3556 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3557 | journal_t *journal = EXT4_SB(sb)->s_journal; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3558 | |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 3559 | if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { |
| 3560 | BUG_ON(journal != NULL); |
| 3561 | return; |
| 3562 | } |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 3563 | jbd2_journal_lock_updates(journal); |
Hidehiro Kawai | 7ffe1ea | 2008-10-10 20:29:21 -0400 | [diff] [blame] | 3564 | if (jbd2_journal_flush(journal) < 0) |
| 3565 | goto out; |
| 3566 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3567 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3568 | sb->s_flags & MS_RDONLY) { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3569 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
Theodore Ts'o | e2d6705 | 2009-05-01 00:33:44 -0400 | [diff] [blame] | 3570 | ext4_commit_super(sb, 1); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3571 | } |
Hidehiro Kawai | 7ffe1ea | 2008-10-10 20:29:21 -0400 | [diff] [blame] | 3572 | |
| 3573 | out: |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 3574 | jbd2_journal_unlock_updates(journal); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3575 | } |
| 3576 | |
| 3577 | /* |
| 3578 | * If we are mounting (or read-write remounting) a filesystem whose journal |
| 3579 | * has recorded an error from a previous lifetime, move that error to the |
| 3580 | * main filesystem now. |
| 3581 | */ |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 3582 | static void ext4_clear_journal_err(struct super_block *sb, |
| 3583 | struct ext4_super_block *es) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3584 | { |
| 3585 | journal_t *journal; |
| 3586 | int j_errno; |
| 3587 | const char *errstr; |
| 3588 | |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 3589 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
| 3590 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3591 | journal = EXT4_SB(sb)->s_journal; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3592 | |
| 3593 | /* |
| 3594 | * 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] | 3595 | * journal by a prior ext4_error() or ext4_abort() |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3596 | */ |
| 3597 | |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 3598 | j_errno = jbd2_journal_errno(journal); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3599 | if (j_errno) { |
| 3600 | char nbuf[16]; |
| 3601 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3602 | errstr = ext4_decode_error(sb, j_errno, nbuf); |
Eric Sandeen | 12062dd | 2010-02-15 14:19:27 -0500 | [diff] [blame] | 3603 | ext4_warning(sb, "Filesystem error recorded " |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3604 | "from previous mount: %s", errstr); |
Eric Sandeen | 12062dd | 2010-02-15 14:19:27 -0500 | [diff] [blame] | 3605 | ext4_warning(sb, "Marking fs in need of filesystem check."); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3606 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3607 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; |
| 3608 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); |
Theodore Ts'o | e2d6705 | 2009-05-01 00:33:44 -0400 | [diff] [blame] | 3609 | ext4_commit_super(sb, 1); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3610 | |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 3611 | jbd2_journal_clear_err(journal); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3612 | } |
| 3613 | } |
| 3614 | |
| 3615 | /* |
| 3616 | * Force the running and committing transactions to commit, |
| 3617 | * and wait on the commit. |
| 3618 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3619 | int ext4_force_commit(struct super_block *sb) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3620 | { |
| 3621 | journal_t *journal; |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 3622 | int ret = 0; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3623 | |
| 3624 | if (sb->s_flags & MS_RDONLY) |
| 3625 | return 0; |
| 3626 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3627 | journal = EXT4_SB(sb)->s_journal; |
Eric Sandeen | 6b0310f | 2010-05-16 02:00:00 -0400 | [diff] [blame] | 3628 | if (journal) { |
Eric Sandeen | 437f88c | 2010-08-01 17:33:29 -0400 | [diff] [blame] | 3629 | vfs_check_frozen(sb, SB_FREEZE_TRANS); |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 3630 | ret = ext4_journal_force_commit(journal); |
Eric Sandeen | 6b0310f | 2010-05-16 02:00:00 -0400 | [diff] [blame] | 3631 | } |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 3632 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3633 | return ret; |
| 3634 | } |
| 3635 | |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 3636 | static void ext4_write_super(struct super_block *sb) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3637 | { |
Christoph Hellwig | ebc1ac1 | 2009-05-11 23:35:03 +0200 | [diff] [blame] | 3638 | lock_super(sb); |
Theodore Ts'o | 9ca9238 | 2009-05-01 12:52:25 -0400 | [diff] [blame] | 3639 | ext4_commit_super(sb, 1); |
Christoph Hellwig | ebc1ac1 | 2009-05-11 23:35:03 +0200 | [diff] [blame] | 3640 | unlock_super(sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3641 | } |
| 3642 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3643 | static int ext4_sync_fs(struct super_block *sb, int wait) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3644 | { |
Theodore Ts'o | 14ce0cb | 2008-11-03 18:10:55 -0500 | [diff] [blame] | 3645 | int ret = 0; |
Jan Kara | 9eddacf | 2009-02-10 06:46:05 -0500 | [diff] [blame] | 3646 | tid_t target; |
Mingming Cao | 8d5d02e | 2009-09-28 15:48:29 -0400 | [diff] [blame] | 3647 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3648 | |
Theodore Ts'o | 9bffad1 | 2009-06-17 11:48:11 -0400 | [diff] [blame] | 3649 | trace_ext4_sync_fs(sb, wait); |
Mingming Cao | 8d5d02e | 2009-09-28 15:48:29 -0400 | [diff] [blame] | 3650 | flush_workqueue(sbi->dio_unwritten_wq); |
| 3651 | if (jbd2_journal_start_commit(sbi->s_journal, &target)) { |
Theodore Ts'o | 9ca9238 | 2009-05-01 12:52:25 -0400 | [diff] [blame] | 3652 | if (wait) |
Mingming Cao | 8d5d02e | 2009-09-28 15:48:29 -0400 | [diff] [blame] | 3653 | jbd2_log_wait_commit(sbi->s_journal, target); |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 3654 | } |
Theodore Ts'o | 14ce0cb | 2008-11-03 18:10:55 -0500 | [diff] [blame] | 3655 | return ret; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3656 | } |
| 3657 | |
| 3658 | /* |
| 3659 | * LVM calls this function before a (read-only) snapshot is created. This |
| 3660 | * gives us a chance to flush the journal completely and mark the fs clean. |
| 3661 | */ |
Takashi Sato | c4be0c1 | 2009-01-09 16:40:58 -0800 | [diff] [blame] | 3662 | static int ext4_freeze(struct super_block *sb) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3663 | { |
Takashi Sato | c4be0c1 | 2009-01-09 16:40:58 -0800 | [diff] [blame] | 3664 | int error = 0; |
| 3665 | journal_t *journal; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3666 | |
Theodore Ts'o | 9ca9238 | 2009-05-01 12:52:25 -0400 | [diff] [blame] | 3667 | if (sb->s_flags & MS_RDONLY) |
| 3668 | return 0; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3669 | |
Theodore Ts'o | 9ca9238 | 2009-05-01 12:52:25 -0400 | [diff] [blame] | 3670 | journal = EXT4_SB(sb)->s_journal; |
Hidehiro Kawai | 7ffe1ea | 2008-10-10 20:29:21 -0400 | [diff] [blame] | 3671 | |
Theodore Ts'o | 9ca9238 | 2009-05-01 12:52:25 -0400 | [diff] [blame] | 3672 | /* Now we set up the journal barrier. */ |
| 3673 | jbd2_journal_lock_updates(journal); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3674 | |
Theodore Ts'o | 9ca9238 | 2009-05-01 12:52:25 -0400 | [diff] [blame] | 3675 | /* |
| 3676 | * Don't clear the needs_recovery flag if we failed to flush |
| 3677 | * the journal. |
| 3678 | */ |
| 3679 | error = jbd2_journal_flush(journal); |
Eric Sandeen | 6b0310f | 2010-05-16 02:00:00 -0400 | [diff] [blame] | 3680 | if (error < 0) |
| 3681 | goto out; |
Theodore Ts'o | 9ca9238 | 2009-05-01 12:52:25 -0400 | [diff] [blame] | 3682 | |
| 3683 | /* Journal blocked and flushed, clear needs_recovery flag. */ |
| 3684 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
| 3685 | error = ext4_commit_super(sb, 1); |
Eric Sandeen | 6b0310f | 2010-05-16 02:00:00 -0400 | [diff] [blame] | 3686 | out: |
| 3687 | /* we rely on s_frozen to stop further updates */ |
| 3688 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); |
| 3689 | return error; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3690 | } |
| 3691 | |
| 3692 | /* |
| 3693 | * Called by LVM after the snapshot is done. We need to reset the RECOVER |
| 3694 | * flag here, even though the filesystem is not technically dirty yet. |
| 3695 | */ |
Takashi Sato | c4be0c1 | 2009-01-09 16:40:58 -0800 | [diff] [blame] | 3696 | static int ext4_unfreeze(struct super_block *sb) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3697 | { |
Theodore Ts'o | 9ca9238 | 2009-05-01 12:52:25 -0400 | [diff] [blame] | 3698 | if (sb->s_flags & MS_RDONLY) |
| 3699 | return 0; |
| 3700 | |
| 3701 | lock_super(sb); |
| 3702 | /* Reset the needs_recovery flag before the fs is unlocked. */ |
| 3703 | EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
| 3704 | ext4_commit_super(sb, 1); |
| 3705 | unlock_super(sb); |
Takashi Sato | c4be0c1 | 2009-01-09 16:40:58 -0800 | [diff] [blame] | 3706 | return 0; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3707 | } |
| 3708 | |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 3709 | static int ext4_remount(struct super_block *sb, int *flags, char *data) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3710 | { |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 3711 | struct ext4_super_block *es; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3712 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
| 3713 | ext4_fsblk_t n_blocks_count = 0; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3714 | unsigned long old_sb_flags; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3715 | struct ext4_mount_options old_opts; |
Christoph Hellwig | c79d967 | 2010-05-19 07:16:40 -0400 | [diff] [blame] | 3716 | int enable_quota = 0; |
Theodore Ts'o | 8a26646 | 2008-07-26 14:34:21 -0400 | [diff] [blame] | 3717 | ext4_group_t g; |
Theodore Ts'o | b3881f7 | 2009-01-05 22:46:26 -0500 | [diff] [blame] | 3718 | unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3719 | int err; |
| 3720 | #ifdef CONFIG_QUOTA |
| 3721 | int i; |
| 3722 | #endif |
Curt Wohlgemuth | d4c402d | 2010-05-16 12:00:00 -0400 | [diff] [blame] | 3723 | char *orig_data = kstrdup(data, GFP_KERNEL); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3724 | |
Alessio Igor Bogani | 337eb00 | 2009-05-12 15:10:54 +0200 | [diff] [blame] | 3725 | lock_kernel(); |
| 3726 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3727 | /* Store the original options */ |
Al Viro | bbd6851 | 2009-05-06 10:43:07 -0400 | [diff] [blame] | 3728 | lock_super(sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3729 | old_sb_flags = sb->s_flags; |
| 3730 | old_opts.s_mount_opt = sbi->s_mount_opt; |
| 3731 | old_opts.s_resuid = sbi->s_resuid; |
| 3732 | old_opts.s_resgid = sbi->s_resgid; |
| 3733 | old_opts.s_commit_interval = sbi->s_commit_interval; |
Theodore Ts'o | 3077384 | 2009-01-03 20:27:38 -0500 | [diff] [blame] | 3734 | old_opts.s_min_batch_time = sbi->s_min_batch_time; |
| 3735 | old_opts.s_max_batch_time = sbi->s_max_batch_time; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3736 | #ifdef CONFIG_QUOTA |
| 3737 | old_opts.s_jquota_fmt = sbi->s_jquota_fmt; |
| 3738 | for (i = 0; i < MAXQUOTAS; i++) |
| 3739 | old_opts.s_qf_names[i] = sbi->s_qf_names[i]; |
| 3740 | #endif |
Theodore Ts'o | b3881f7 | 2009-01-05 22:46:26 -0500 | [diff] [blame] | 3741 | if (sbi->s_journal && sbi->s_journal->j_task->io_context) |
| 3742 | journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3743 | |
| 3744 | /* |
| 3745 | * Allow the "check" option to be passed as a remount option. |
| 3746 | */ |
Theodore Ts'o | b3881f7 | 2009-01-05 22:46:26 -0500 | [diff] [blame] | 3747 | if (!parse_options(data, sb, NULL, &journal_ioprio, |
| 3748 | &n_blocks_count, 1)) { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3749 | err = -EINVAL; |
| 3750 | goto restore_opts; |
| 3751 | } |
| 3752 | |
Theodore Ts'o | 4ab2f15 | 2009-06-13 10:09:36 -0400 | [diff] [blame] | 3753 | if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) |
Theodore Ts'o | c67d859 | 2010-06-29 11:07:07 -0400 | [diff] [blame] | 3754 | ext4_abort(sb, "Abort forced by user"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3755 | |
| 3756 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | |
Dmitry Monakhov | 482a742 | 2010-02-24 11:35:32 -0500 | [diff] [blame] | 3757 | (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3758 | |
| 3759 | es = sbi->s_es; |
| 3760 | |
Theodore Ts'o | b3881f7 | 2009-01-05 22:46:26 -0500 | [diff] [blame] | 3761 | if (sbi->s_journal) { |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 3762 | ext4_init_journal_params(sb, sbi->s_journal); |
Theodore Ts'o | b3881f7 | 2009-01-05 22:46:26 -0500 | [diff] [blame] | 3763 | set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); |
| 3764 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3765 | |
| 3766 | if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY) || |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 3767 | n_blocks_count > ext4_blocks_count(es)) { |
Theodore Ts'o | 4ab2f15 | 2009-06-13 10:09:36 -0400 | [diff] [blame] | 3768 | if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3769 | err = -EROFS; |
| 3770 | goto restore_opts; |
| 3771 | } |
| 3772 | |
| 3773 | if (*flags & MS_RDONLY) { |
Christoph Hellwig | 0f0dd62 | 2010-05-19 07:16:41 -0400 | [diff] [blame] | 3774 | err = dquot_suspend(sb, -1); |
| 3775 | if (err < 0) |
Christoph Hellwig | c79d967 | 2010-05-19 07:16:40 -0400 | [diff] [blame] | 3776 | goto restore_opts; |
Christoph Hellwig | c79d967 | 2010-05-19 07:16:40 -0400 | [diff] [blame] | 3777 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3778 | /* |
| 3779 | * First of all, the unconditional stuff we have to do |
| 3780 | * to disable replay of the journal when we next remount |
| 3781 | */ |
| 3782 | sb->s_flags |= MS_RDONLY; |
| 3783 | |
| 3784 | /* |
| 3785 | * OK, test if we are remounting a valid rw partition |
| 3786 | * readonly, and if so set the rdonly flag and then |
| 3787 | * mark the partition as valid again. |
| 3788 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3789 | if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && |
| 3790 | (sbi->s_mount_state & EXT4_VALID_FS)) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3791 | es->s_state = cpu_to_le16(sbi->s_mount_state); |
| 3792 | |
Theodore Ts'o | a63c9eb | 2009-05-01 01:59:42 -0400 | [diff] [blame] | 3793 | if (sbi->s_journal) |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 3794 | ext4_mark_recovery_complete(sb, es); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3795 | } else { |
Eric Sandeen | a13fb1a | 2009-08-18 00:20:23 -0400 | [diff] [blame] | 3796 | /* Make sure we can mount this feature set readwrite */ |
| 3797 | if (!ext4_feature_set_ok(sb, 0)) { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3798 | err = -EROFS; |
| 3799 | goto restore_opts; |
| 3800 | } |
Eric Sandeen | ead6596 | 2007-02-10 01:46:08 -0800 | [diff] [blame] | 3801 | /* |
Theodore Ts'o | 8a26646 | 2008-07-26 14:34:21 -0400 | [diff] [blame] | 3802 | * Make sure the group descriptor checksums |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 3803 | * are sane. If they aren't, refuse to remount r/w. |
Theodore Ts'o | 8a26646 | 2008-07-26 14:34:21 -0400 | [diff] [blame] | 3804 | */ |
| 3805 | for (g = 0; g < sbi->s_groups_count; g++) { |
| 3806 | struct ext4_group_desc *gdp = |
| 3807 | ext4_get_group_desc(sb, g, NULL); |
| 3808 | |
| 3809 | if (!ext4_group_desc_csum_verify(sbi, g, gdp)) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3810 | ext4_msg(sb, KERN_ERR, |
| 3811 | "ext4_remount: Checksum for group %u failed (%u!=%u)", |
Theodore Ts'o | 8a26646 | 2008-07-26 14:34:21 -0400 | [diff] [blame] | 3812 | g, le16_to_cpu(ext4_group_desc_csum(sbi, g, gdp)), |
| 3813 | le16_to_cpu(gdp->bg_checksum)); |
| 3814 | err = -EINVAL; |
| 3815 | goto restore_opts; |
| 3816 | } |
| 3817 | } |
| 3818 | |
| 3819 | /* |
Eric Sandeen | ead6596 | 2007-02-10 01:46:08 -0800 | [diff] [blame] | 3820 | * If we have an unprocessed orphan list hanging |
| 3821 | * around from a previously readonly bdev mount, |
| 3822 | * require a full umount/remount for now. |
| 3823 | */ |
| 3824 | if (es->s_last_orphan) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3825 | ext4_msg(sb, KERN_WARNING, "Couldn't " |
Eric Sandeen | ead6596 | 2007-02-10 01:46:08 -0800 | [diff] [blame] | 3826 | "remount RDWR because of unprocessed " |
| 3827 | "orphan inode list. Please " |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 3828 | "umount/remount instead"); |
Eric Sandeen | ead6596 | 2007-02-10 01:46:08 -0800 | [diff] [blame] | 3829 | err = -EINVAL; |
| 3830 | goto restore_opts; |
| 3831 | } |
| 3832 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3833 | /* |
| 3834 | * Mounting a RDONLY partition read-write, so reread |
| 3835 | * and store the current valid flag. (It may have |
| 3836 | * been changed by e2fsck since we originally mounted |
| 3837 | * the partition.) |
| 3838 | */ |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 3839 | if (sbi->s_journal) |
| 3840 | ext4_clear_journal_err(sb, es); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3841 | sbi->s_mount_state = le16_to_cpu(es->s_state); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3842 | if ((err = ext4_group_extend(sb, es, n_blocks_count))) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3843 | goto restore_opts; |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 3844 | if (!ext4_setup_super(sb, es, 0)) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3845 | sb->s_flags &= ~MS_RDONLY; |
Christoph Hellwig | c79d967 | 2010-05-19 07:16:40 -0400 | [diff] [blame] | 3846 | enable_quota = 1; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3847 | } |
| 3848 | } |
Theodore Ts'o | 6fd058f | 2009-05-17 15:38:01 -0400 | [diff] [blame] | 3849 | ext4_setup_system_zone(sb); |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 3850 | if (sbi->s_journal == NULL) |
Theodore Ts'o | e2d6705 | 2009-05-01 00:33:44 -0400 | [diff] [blame] | 3851 | ext4_commit_super(sb, 1); |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 3852 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3853 | #ifdef CONFIG_QUOTA |
| 3854 | /* Release old quota file names */ |
| 3855 | for (i = 0; i < MAXQUOTAS; i++) |
| 3856 | if (old_opts.s_qf_names[i] && |
| 3857 | old_opts.s_qf_names[i] != sbi->s_qf_names[i]) |
| 3858 | kfree(old_opts.s_qf_names[i]); |
| 3859 | #endif |
Al Viro | bbd6851 | 2009-05-06 10:43:07 -0400 | [diff] [blame] | 3860 | unlock_super(sb); |
Alessio Igor Bogani | 337eb00 | 2009-05-12 15:10:54 +0200 | [diff] [blame] | 3861 | unlock_kernel(); |
Christoph Hellwig | c79d967 | 2010-05-19 07:16:40 -0400 | [diff] [blame] | 3862 | if (enable_quota) |
Christoph Hellwig | 0f0dd62 | 2010-05-19 07:16:41 -0400 | [diff] [blame] | 3863 | dquot_resume(sb, -1); |
Curt Wohlgemuth | d4c402d | 2010-05-16 12:00:00 -0400 | [diff] [blame] | 3864 | |
| 3865 | ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s", orig_data); |
| 3866 | kfree(orig_data); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3867 | return 0; |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 3868 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3869 | restore_opts: |
| 3870 | sb->s_flags = old_sb_flags; |
| 3871 | sbi->s_mount_opt = old_opts.s_mount_opt; |
| 3872 | sbi->s_resuid = old_opts.s_resuid; |
| 3873 | sbi->s_resgid = old_opts.s_resgid; |
| 3874 | sbi->s_commit_interval = old_opts.s_commit_interval; |
Theodore Ts'o | 3077384 | 2009-01-03 20:27:38 -0500 | [diff] [blame] | 3875 | sbi->s_min_batch_time = old_opts.s_min_batch_time; |
| 3876 | sbi->s_max_batch_time = old_opts.s_max_batch_time; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3877 | #ifdef CONFIG_QUOTA |
| 3878 | sbi->s_jquota_fmt = old_opts.s_jquota_fmt; |
| 3879 | for (i = 0; i < MAXQUOTAS; i++) { |
| 3880 | if (sbi->s_qf_names[i] && |
| 3881 | old_opts.s_qf_names[i] != sbi->s_qf_names[i]) |
| 3882 | kfree(sbi->s_qf_names[i]); |
| 3883 | sbi->s_qf_names[i] = old_opts.s_qf_names[i]; |
| 3884 | } |
| 3885 | #endif |
Al Viro | bbd6851 | 2009-05-06 10:43:07 -0400 | [diff] [blame] | 3886 | unlock_super(sb); |
Alessio Igor Bogani | 337eb00 | 2009-05-12 15:10:54 +0200 | [diff] [blame] | 3887 | unlock_kernel(); |
Curt Wohlgemuth | d4c402d | 2010-05-16 12:00:00 -0400 | [diff] [blame] | 3888 | kfree(orig_data); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3889 | return err; |
| 3890 | } |
| 3891 | |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 3892 | static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3893 | { |
| 3894 | struct super_block *sb = dentry->d_sb; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3895 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
| 3896 | struct ext4_super_block *es = sbi->s_es; |
Pekka Enberg | 960cc39 | 2006-12-06 20:35:29 -0800 | [diff] [blame] | 3897 | u64 fsid; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3898 | |
Badari Pulavarty | 5e70030 | 2007-07-15 23:42:00 -0700 | [diff] [blame] | 3899 | if (test_opt(sb, MINIX_DF)) { |
| 3900 | sbi->s_overhead_last = 0; |
Aneesh Kumar K.V | 6bc9fef | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 3901 | } else if (sbi->s_blocks_last != ext4_blocks_count(es)) { |
Theodore Ts'o | 8df9675 | 2009-05-01 08:50:38 -0400 | [diff] [blame] | 3902 | ext4_group_t i, ngroups = ext4_get_groups_count(sb); |
Badari Pulavarty | 5e70030 | 2007-07-15 23:42:00 -0700 | [diff] [blame] | 3903 | ext4_fsblk_t overhead = 0; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3904 | |
| 3905 | /* |
Badari Pulavarty | 5e70030 | 2007-07-15 23:42:00 -0700 | [diff] [blame] | 3906 | * Compute the overhead (FS structures). This is constant |
| 3907 | * for a given filesystem unless the number of block groups |
| 3908 | * changes so we cache the previous value until it does. |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3909 | */ |
| 3910 | |
| 3911 | /* |
| 3912 | * All of the blocks before first_data_block are |
| 3913 | * overhead |
| 3914 | */ |
| 3915 | overhead = le32_to_cpu(es->s_first_data_block); |
| 3916 | |
| 3917 | /* |
| 3918 | * Add the overhead attributed to the superblock and |
| 3919 | * block group descriptors. If the sparse superblocks |
| 3920 | * feature is turned on, then not all groups have this. |
| 3921 | */ |
| 3922 | for (i = 0; i < ngroups; i++) { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3923 | overhead += ext4_bg_has_super(sb, i) + |
| 3924 | ext4_bg_num_gdb(sb, i); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3925 | cond_resched(); |
| 3926 | } |
| 3927 | |
| 3928 | /* |
| 3929 | * Every block group has an inode bitmap, a block |
| 3930 | * bitmap, and an inode table. |
| 3931 | */ |
Badari Pulavarty | 5e70030 | 2007-07-15 23:42:00 -0700 | [diff] [blame] | 3932 | overhead += ngroups * (2 + sbi->s_itb_per_group); |
| 3933 | sbi->s_overhead_last = overhead; |
| 3934 | smp_wmb(); |
Aneesh Kumar K.V | 6bc9fef | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 3935 | sbi->s_blocks_last = ext4_blocks_count(es); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3936 | } |
| 3937 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3938 | buf->f_type = EXT4_SUPER_MAGIC; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3939 | buf->f_bsize = sb->s_blocksize; |
Badari Pulavarty | 5e70030 | 2007-07-15 23:42:00 -0700 | [diff] [blame] | 3940 | buf->f_blocks = ext4_blocks_count(es) - sbi->s_overhead_last; |
Aneesh Kumar K.V | 6bc6e63 | 2008-10-10 09:39:00 -0400 | [diff] [blame] | 3941 | buf->f_bfree = percpu_counter_sum_positive(&sbi->s_freeblocks_counter) - |
| 3942 | percpu_counter_sum_positive(&sbi->s_dirtyblocks_counter); |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 3943 | buf->f_bavail = buf->f_bfree - ext4_r_blocks_count(es); |
| 3944 | if (buf->f_bfree < ext4_r_blocks_count(es)) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3945 | buf->f_bavail = 0; |
| 3946 | buf->f_files = le32_to_cpu(es->s_inodes_count); |
Peter Zijlstra | 52d9f3b | 2007-10-16 23:25:44 -0700 | [diff] [blame] | 3947 | buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3948 | buf->f_namelen = EXT4_NAME_LEN; |
Pekka Enberg | 960cc39 | 2006-12-06 20:35:29 -0800 | [diff] [blame] | 3949 | fsid = le64_to_cpup((void *)es->s_uuid) ^ |
| 3950 | le64_to_cpup((void *)es->s_uuid + sizeof(u64)); |
| 3951 | buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; |
| 3952 | buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 3953 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3954 | return 0; |
| 3955 | } |
| 3956 | |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 3957 | /* Helper function for writing quotas on sync - we need to start transaction |
| 3958 | * before quota file is locked for write. Otherwise the are possible deadlocks: |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3959 | * Process 1 Process 2 |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3960 | * ext4_create() quota_sync() |
Jan Kara | a269eb1 | 2009-01-26 17:04:39 +0100 | [diff] [blame] | 3961 | * jbd2_journal_start() write_dquot() |
Christoph Hellwig | 871a293 | 2010-03-03 09:05:07 -0500 | [diff] [blame] | 3962 | * dquot_initialize() down(dqio_mutex) |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 3963 | * down(dqio_mutex) jbd2_journal_start() |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3964 | * |
| 3965 | */ |
| 3966 | |
| 3967 | #ifdef CONFIG_QUOTA |
| 3968 | |
| 3969 | static inline struct inode *dquot_to_inode(struct dquot *dquot) |
| 3970 | { |
| 3971 | return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type]; |
| 3972 | } |
| 3973 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3974 | static int ext4_write_dquot(struct dquot *dquot) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3975 | { |
| 3976 | int ret, err; |
| 3977 | handle_t *handle; |
| 3978 | struct inode *inode; |
| 3979 | |
| 3980 | inode = dquot_to_inode(dquot); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3981 | handle = ext4_journal_start(inode, |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 3982 | EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3983 | if (IS_ERR(handle)) |
| 3984 | return PTR_ERR(handle); |
| 3985 | ret = dquot_commit(dquot); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3986 | err = ext4_journal_stop(handle); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3987 | if (!ret) |
| 3988 | ret = err; |
| 3989 | return ret; |
| 3990 | } |
| 3991 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3992 | static int ext4_acquire_dquot(struct dquot *dquot) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3993 | { |
| 3994 | int ret, err; |
| 3995 | handle_t *handle; |
| 3996 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3997 | handle = ext4_journal_start(dquot_to_inode(dquot), |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 3998 | EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3999 | if (IS_ERR(handle)) |
| 4000 | return PTR_ERR(handle); |
| 4001 | ret = dquot_acquire(dquot); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4002 | err = ext4_journal_stop(handle); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4003 | if (!ret) |
| 4004 | ret = err; |
| 4005 | return ret; |
| 4006 | } |
| 4007 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4008 | static int ext4_release_dquot(struct dquot *dquot) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4009 | { |
| 4010 | int ret, err; |
| 4011 | handle_t *handle; |
| 4012 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4013 | handle = ext4_journal_start(dquot_to_inode(dquot), |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 4014 | EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); |
Jan Kara | 9c3013e | 2007-09-11 15:23:29 -0700 | [diff] [blame] | 4015 | if (IS_ERR(handle)) { |
| 4016 | /* Release dquot anyway to avoid endless cycle in dqput() */ |
| 4017 | dquot_release(dquot); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4018 | return PTR_ERR(handle); |
Jan Kara | 9c3013e | 2007-09-11 15:23:29 -0700 | [diff] [blame] | 4019 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4020 | ret = dquot_release(dquot); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4021 | err = ext4_journal_stop(handle); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4022 | if (!ret) |
| 4023 | ret = err; |
| 4024 | return ret; |
| 4025 | } |
| 4026 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4027 | static int ext4_mark_dquot_dirty(struct dquot *dquot) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4028 | { |
Jan Kara | 2c8be6b | 2008-05-13 21:27:55 -0400 | [diff] [blame] | 4029 | /* Are we journaling quotas? */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4030 | if (EXT4_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || |
| 4031 | EXT4_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4032 | dquot_mark_dquot_dirty(dquot); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4033 | return ext4_write_dquot(dquot); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4034 | } else { |
| 4035 | return dquot_mark_dquot_dirty(dquot); |
| 4036 | } |
| 4037 | } |
| 4038 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4039 | static int ext4_write_info(struct super_block *sb, int type) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4040 | { |
| 4041 | int ret, err; |
| 4042 | handle_t *handle; |
| 4043 | |
| 4044 | /* Data block + inode block */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4045 | handle = ext4_journal_start(sb->s_root->d_inode, 2); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4046 | if (IS_ERR(handle)) |
| 4047 | return PTR_ERR(handle); |
| 4048 | ret = dquot_commit_info(sb, type); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4049 | err = ext4_journal_stop(handle); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4050 | if (!ret) |
| 4051 | ret = err; |
| 4052 | return ret; |
| 4053 | } |
| 4054 | |
| 4055 | /* |
| 4056 | * Turn on quotas during mount time - we need to find |
| 4057 | * the quota file and such... |
| 4058 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4059 | static int ext4_quota_on_mount(struct super_block *sb, int type) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4060 | { |
Christoph Hellwig | 287a809 | 2010-05-19 07:16:45 -0400 | [diff] [blame] | 4061 | return dquot_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], |
| 4062 | EXT4_SB(sb)->s_jquota_fmt, type); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4063 | } |
| 4064 | |
| 4065 | /* |
| 4066 | * Standard function to be called on quota_on |
| 4067 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4068 | static int ext4_quota_on(struct super_block *sb, int type, int format_id, |
Christoph Hellwig | 307ae18 | 2010-05-19 07:16:43 -0400 | [diff] [blame] | 4069 | char *name) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4070 | { |
| 4071 | int err; |
Al Viro | 8264613 | 2008-08-02 00:57:06 -0400 | [diff] [blame] | 4072 | struct path path; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4073 | |
| 4074 | if (!test_opt(sb, QUOTA)) |
| 4075 | return -EINVAL; |
Jan Kara | 0623543 | 2008-05-13 19:11:51 -0400 | [diff] [blame] | 4076 | |
Al Viro | 8264613 | 2008-08-02 00:57:06 -0400 | [diff] [blame] | 4077 | err = kern_path(name, LOOKUP_FOLLOW, &path); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4078 | if (err) |
| 4079 | return err; |
Jan Kara | 0623543 | 2008-05-13 19:11:51 -0400 | [diff] [blame] | 4080 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4081 | /* Quotafile not on the same filesystem? */ |
Al Viro | 8264613 | 2008-08-02 00:57:06 -0400 | [diff] [blame] | 4082 | if (path.mnt->mnt_sb != sb) { |
| 4083 | path_put(&path); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4084 | return -EXDEV; |
| 4085 | } |
Jan Kara | 0623543 | 2008-05-13 19:11:51 -0400 | [diff] [blame] | 4086 | /* Journaling quota? */ |
| 4087 | if (EXT4_SB(sb)->s_qf_names[type]) { |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 4088 | /* Quotafile not in fs root? */ |
Al Viro | 8264613 | 2008-08-02 00:57:06 -0400 | [diff] [blame] | 4089 | if (path.dentry->d_parent != sb->s_root) |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 4090 | ext4_msg(sb, KERN_WARNING, |
| 4091 | "Quota file not on filesystem root. " |
| 4092 | "Journaled quota will not work"); |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 4093 | } |
Jan Kara | 0623543 | 2008-05-13 19:11:51 -0400 | [diff] [blame] | 4094 | |
| 4095 | /* |
| 4096 | * When we journal data on quota file, we have to flush journal to see |
| 4097 | * all updates to the file when we bypass pagecache... |
| 4098 | */ |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 4099 | if (EXT4_SB(sb)->s_journal && |
| 4100 | ext4_should_journal_data(path.dentry->d_inode)) { |
Jan Kara | 0623543 | 2008-05-13 19:11:51 -0400 | [diff] [blame] | 4101 | /* |
| 4102 | * We don't need to lock updates but journal_flush() could |
| 4103 | * otherwise be livelocked... |
| 4104 | */ |
| 4105 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); |
Hidehiro Kawai | 7ffe1ea | 2008-10-10 20:29:21 -0400 | [diff] [blame] | 4106 | err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); |
Jan Kara | 0623543 | 2008-05-13 19:11:51 -0400 | [diff] [blame] | 4107 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); |
Hidehiro Kawai | 7ffe1ea | 2008-10-10 20:29:21 -0400 | [diff] [blame] | 4108 | if (err) { |
Al Viro | 8264613 | 2008-08-02 00:57:06 -0400 | [diff] [blame] | 4109 | path_put(&path); |
Hidehiro Kawai | 7ffe1ea | 2008-10-10 20:29:21 -0400 | [diff] [blame] | 4110 | return err; |
| 4111 | } |
Jan Kara | 0623543 | 2008-05-13 19:11:51 -0400 | [diff] [blame] | 4112 | } |
| 4113 | |
Christoph Hellwig | 287a809 | 2010-05-19 07:16:45 -0400 | [diff] [blame] | 4114 | err = dquot_quota_on_path(sb, type, format_id, &path); |
Al Viro | 8264613 | 2008-08-02 00:57:06 -0400 | [diff] [blame] | 4115 | path_put(&path); |
Al Viro | 77e69da | 2008-08-01 04:29:18 -0400 | [diff] [blame] | 4116 | return err; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4117 | } |
| 4118 | |
Dmitry Monakhov | ca0e05e | 2010-08-01 17:48:36 -0400 | [diff] [blame] | 4119 | static int ext4_quota_off(struct super_block *sb, int type) |
| 4120 | { |
| 4121 | /* Force all delayed allocation blocks to be allocated */ |
| 4122 | if (test_opt(sb, DELALLOC)) { |
| 4123 | down_read(&sb->s_umount); |
| 4124 | sync_filesystem(sb); |
| 4125 | up_read(&sb->s_umount); |
| 4126 | } |
| 4127 | |
| 4128 | return dquot_quota_off(sb, type); |
| 4129 | } |
| 4130 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4131 | /* Read data from quotafile - avoid pagecache and such because we cannot afford |
| 4132 | * acquiring the locks... As quota files are never truncated and quota code |
| 4133 | * itself serializes the operations (and noone else should touch the files) |
| 4134 | * we don't have to be afraid of races */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4135 | 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] | 4136 | size_t len, loff_t off) |
| 4137 | { |
| 4138 | struct inode *inode = sb_dqopt(sb)->files[type]; |
Aneesh Kumar K.V | 725d26d | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 4139 | ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4140 | int err = 0; |
| 4141 | int offset = off & (sb->s_blocksize - 1); |
| 4142 | int tocopy; |
| 4143 | size_t toread; |
| 4144 | struct buffer_head *bh; |
| 4145 | loff_t i_size = i_size_read(inode); |
| 4146 | |
| 4147 | if (off > i_size) |
| 4148 | return 0; |
| 4149 | if (off+len > i_size) |
| 4150 | len = i_size-off; |
| 4151 | toread = len; |
| 4152 | while (toread > 0) { |
| 4153 | tocopy = sb->s_blocksize - offset < toread ? |
| 4154 | sb->s_blocksize - offset : toread; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4155 | bh = ext4_bread(NULL, inode, blk, 0, &err); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4156 | if (err) |
| 4157 | return err; |
| 4158 | if (!bh) /* A hole? */ |
| 4159 | memset(data, 0, tocopy); |
| 4160 | else |
| 4161 | memcpy(data, bh->b_data+offset, tocopy); |
| 4162 | brelse(bh); |
| 4163 | offset = 0; |
| 4164 | toread -= tocopy; |
| 4165 | data += tocopy; |
| 4166 | blk++; |
| 4167 | } |
| 4168 | return len; |
| 4169 | } |
| 4170 | |
| 4171 | /* Write to quotafile (we know the transaction is already started and has |
| 4172 | * enough credits) */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4173 | static ssize_t ext4_quota_write(struct super_block *sb, int type, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4174 | const char *data, size_t len, loff_t off) |
| 4175 | { |
| 4176 | struct inode *inode = sb_dqopt(sb)->files[type]; |
Aneesh Kumar K.V | 725d26d | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 4177 | ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4178 | int err = 0; |
| 4179 | int offset = off & (sb->s_blocksize - 1); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4180 | struct buffer_head *bh; |
| 4181 | handle_t *handle = journal_current_handle(); |
| 4182 | |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 4183 | if (EXT4_SB(sb)->s_journal && !handle) { |
Eric Sandeen | b31e155 | 2009-06-04 17:36:36 -0400 | [diff] [blame] | 4184 | ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" |
| 4185 | " cancelled because transaction is not started", |
Jan Kara | 9c3013e | 2007-09-11 15:23:29 -0700 | [diff] [blame] | 4186 | (unsigned long long)off, (unsigned long long)len); |
| 4187 | return -EIO; |
| 4188 | } |
Dmitry Monakhov | 67eeb56 | 2010-03-02 08:08:51 -0500 | [diff] [blame] | 4189 | /* |
| 4190 | * Since we account only one data block in transaction credits, |
| 4191 | * then it is impossible to cross a block boundary. |
| 4192 | */ |
| 4193 | if (sb->s_blocksize - offset < len) { |
| 4194 | ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" |
| 4195 | " cancelled because not block aligned", |
| 4196 | (unsigned long long)off, (unsigned long long)len); |
| 4197 | return -EIO; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4198 | } |
Dmitry Monakhov | 67eeb56 | 2010-03-02 08:08:51 -0500 | [diff] [blame] | 4199 | |
| 4200 | mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA); |
| 4201 | bh = ext4_bread(handle, inode, blk, 1, &err); |
| 4202 | if (!bh) |
| 4203 | goto out; |
Jan Kara | 62d2b5f | 2010-07-27 11:56:07 -0400 | [diff] [blame] | 4204 | err = ext4_journal_get_write_access(handle, bh); |
| 4205 | if (err) { |
| 4206 | brelse(bh); |
| 4207 | goto out; |
Dmitry Monakhov | 67eeb56 | 2010-03-02 08:08:51 -0500 | [diff] [blame] | 4208 | } |
| 4209 | lock_buffer(bh); |
| 4210 | memcpy(bh->b_data+offset, data, len); |
| 4211 | flush_dcache_page(bh->b_page); |
| 4212 | unlock_buffer(bh); |
Jan Kara | 62d2b5f | 2010-07-27 11:56:07 -0400 | [diff] [blame] | 4213 | err = ext4_handle_dirty_metadata(handle, NULL, bh); |
Dmitry Monakhov | 67eeb56 | 2010-03-02 08:08:51 -0500 | [diff] [blame] | 4214 | brelse(bh); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4215 | out: |
Dmitry Monakhov | 67eeb56 | 2010-03-02 08:08:51 -0500 | [diff] [blame] | 4216 | if (err) { |
Jan Kara | 4d04e4f | 2008-07-04 09:59:34 -0700 | [diff] [blame] | 4217 | mutex_unlock(&inode->i_mutex); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4218 | return err; |
Jan Kara | 4d04e4f | 2008-07-04 09:59:34 -0700 | [diff] [blame] | 4219 | } |
Dmitry Monakhov | 67eeb56 | 2010-03-02 08:08:51 -0500 | [diff] [blame] | 4220 | if (inode->i_size < off + len) { |
| 4221 | i_size_write(inode, off + len); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4222 | EXT4_I(inode)->i_disksize = inode->i_size; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4223 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4224 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4225 | ext4_mark_inode_dirty(handle, inode); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4226 | mutex_unlock(&inode->i_mutex); |
Dmitry Monakhov | 67eeb56 | 2010-03-02 08:08:51 -0500 | [diff] [blame] | 4227 | return len; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4228 | } |
| 4229 | |
| 4230 | #endif |
| 4231 | |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 4232 | static int ext4_get_sb(struct file_system_type *fs_type, int flags, |
| 4233 | const char *dev_name, void *data, struct vfsmount *mnt) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4234 | { |
Andreas Dilger | 0b8e58a | 2009-06-03 17:59:28 -0400 | [diff] [blame] | 4235 | return get_sb_bdev(fs_type, flags, dev_name, data, ext4_fill_super,mnt); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4236 | } |
| 4237 | |
Theodore Ts'o | 37f328e | 2010-03-24 20:06:41 -0400 | [diff] [blame] | 4238 | #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] | 4239 | static struct file_system_type ext2_fs_type = { |
| 4240 | .owner = THIS_MODULE, |
| 4241 | .name = "ext2", |
| 4242 | .get_sb = ext4_get_sb, |
| 4243 | .kill_sb = kill_block_super, |
| 4244 | .fs_flags = FS_REQUIRES_DEV, |
| 4245 | }; |
| 4246 | |
| 4247 | static inline void register_as_ext2(void) |
| 4248 | { |
| 4249 | int err = register_filesystem(&ext2_fs_type); |
| 4250 | if (err) |
| 4251 | printk(KERN_WARNING |
| 4252 | "EXT4-fs: Unable to register as ext2 (%d)\n", err); |
| 4253 | } |
| 4254 | |
| 4255 | static inline void unregister_as_ext2(void) |
| 4256 | { |
| 4257 | unregister_filesystem(&ext2_fs_type); |
| 4258 | } |
Theodore Ts'o | 51b7e3c | 2009-12-21 10:56:09 -0500 | [diff] [blame] | 4259 | MODULE_ALIAS("ext2"); |
Theodore Ts'o | 24b5842 | 2009-12-07 14:08:51 -0500 | [diff] [blame] | 4260 | #else |
| 4261 | static inline void register_as_ext2(void) { } |
| 4262 | static inline void unregister_as_ext2(void) { } |
| 4263 | #endif |
| 4264 | |
Theodore Ts'o | 37f328e | 2010-03-24 20:06:41 -0400 | [diff] [blame] | 4265 | #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] | 4266 | static inline void register_as_ext3(void) |
| 4267 | { |
| 4268 | int err = register_filesystem(&ext3_fs_type); |
| 4269 | if (err) |
| 4270 | printk(KERN_WARNING |
| 4271 | "EXT4-fs: Unable to register as ext3 (%d)\n", err); |
| 4272 | } |
| 4273 | |
| 4274 | static inline void unregister_as_ext3(void) |
| 4275 | { |
| 4276 | unregister_filesystem(&ext3_fs_type); |
| 4277 | } |
Theodore Ts'o | 51b7e3c | 2009-12-21 10:56:09 -0500 | [diff] [blame] | 4278 | MODULE_ALIAS("ext3"); |
Theodore Ts'o | 24b5842 | 2009-12-07 14:08:51 -0500 | [diff] [blame] | 4279 | #else |
| 4280 | static inline void register_as_ext3(void) { } |
| 4281 | static inline void unregister_as_ext3(void) { } |
| 4282 | #endif |
| 4283 | |
Theodore Ts'o | 03010a3 | 2008-10-10 20:02:48 -0400 | [diff] [blame] | 4284 | static struct file_system_type ext4_fs_type = { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4285 | .owner = THIS_MODULE, |
Theodore Ts'o | 03010a3 | 2008-10-10 20:02:48 -0400 | [diff] [blame] | 4286 | .name = "ext4", |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4287 | .get_sb = ext4_get_sb, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4288 | .kill_sb = kill_block_super, |
| 4289 | .fs_flags = FS_REQUIRES_DEV, |
| 4290 | }; |
| 4291 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4292 | static int __init init_ext4_fs(void) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4293 | { |
Alex Tomas | c9de560 | 2008-01-29 00:19:52 -0500 | [diff] [blame] | 4294 | int err; |
| 4295 | |
Dmitry Monakhov | 12e9b89 | 2010-05-16 22:00:00 -0400 | [diff] [blame] | 4296 | ext4_check_flag_values(); |
Theodore Ts'o | 6fd058f | 2009-05-17 15:38:01 -0400 | [diff] [blame] | 4297 | err = init_ext4_system_zone(); |
| 4298 | if (err) |
| 4299 | return err; |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 4300 | ext4_kset = kset_create_and_add("ext4", NULL, fs_kobj); |
| 4301 | if (!ext4_kset) |
Theodore Ts'o | 6fd058f | 2009-05-17 15:38:01 -0400 | [diff] [blame] | 4302 | goto out4; |
Theodore Ts'o | 9f6200b | 2008-09-23 09:18:24 -0400 | [diff] [blame] | 4303 | ext4_proc_root = proc_mkdir("fs/ext4", NULL); |
Alex Tomas | c9de560 | 2008-01-29 00:19:52 -0500 | [diff] [blame] | 4304 | err = init_ext4_mballoc(); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4305 | if (err) |
Theodore Ts'o | 6fd058f | 2009-05-17 15:38:01 -0400 | [diff] [blame] | 4306 | goto out3; |
Alex Tomas | c9de560 | 2008-01-29 00:19:52 -0500 | [diff] [blame] | 4307 | |
| 4308 | err = init_ext4_xattr(); |
| 4309 | if (err) |
| 4310 | goto out2; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4311 | err = init_inodecache(); |
| 4312 | if (err) |
| 4313 | goto out1; |
Theodore Ts'o | 24b5842 | 2009-12-07 14:08:51 -0500 | [diff] [blame] | 4314 | register_as_ext2(); |
| 4315 | register_as_ext3(); |
Theodore Ts'o | 03010a3 | 2008-10-10 20:02:48 -0400 | [diff] [blame] | 4316 | err = register_filesystem(&ext4_fs_type); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4317 | if (err) |
| 4318 | goto out; |
| 4319 | return 0; |
| 4320 | out: |
Theodore Ts'o | 24b5842 | 2009-12-07 14:08:51 -0500 | [diff] [blame] | 4321 | unregister_as_ext2(); |
| 4322 | unregister_as_ext3(); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4323 | destroy_inodecache(); |
| 4324 | out1: |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4325 | exit_ext4_xattr(); |
Alex Tomas | c9de560 | 2008-01-29 00:19:52 -0500 | [diff] [blame] | 4326 | out2: |
| 4327 | exit_ext4_mballoc(); |
Theodore Ts'o | 6fd058f | 2009-05-17 15:38:01 -0400 | [diff] [blame] | 4328 | out3: |
| 4329 | remove_proc_entry("fs/ext4", NULL); |
| 4330 | kset_unregister(ext4_kset); |
| 4331 | out4: |
| 4332 | exit_ext4_system_zone(); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4333 | return err; |
| 4334 | } |
| 4335 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4336 | static void __exit exit_ext4_fs(void) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4337 | { |
Theodore Ts'o | 24b5842 | 2009-12-07 14:08:51 -0500 | [diff] [blame] | 4338 | unregister_as_ext2(); |
| 4339 | unregister_as_ext3(); |
Theodore Ts'o | 03010a3 | 2008-10-10 20:02:48 -0400 | [diff] [blame] | 4340 | unregister_filesystem(&ext4_fs_type); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4341 | destroy_inodecache(); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4342 | exit_ext4_xattr(); |
Alex Tomas | c9de560 | 2008-01-29 00:19:52 -0500 | [diff] [blame] | 4343 | exit_ext4_mballoc(); |
Theodore Ts'o | 9f6200b | 2008-09-23 09:18:24 -0400 | [diff] [blame] | 4344 | remove_proc_entry("fs/ext4", NULL); |
Theodore Ts'o | 3197ebd | 2009-03-31 09:10:09 -0400 | [diff] [blame] | 4345 | kset_unregister(ext4_kset); |
Theodore Ts'o | 6fd058f | 2009-05-17 15:38:01 -0400 | [diff] [blame] | 4346 | exit_ext4_system_zone(); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4347 | } |
| 4348 | |
| 4349 | 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] | 4350 | MODULE_DESCRIPTION("Fourth Extended Filesystem"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 4351 | MODULE_LICENSE("GPL"); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 4352 | module_init(init_ext4_fs) |
| 4353 | module_exit(exit_ext4_fs) |