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> |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 23 | #include <linux/jbd2.h> |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 24 | #include <linux/slab.h> |
| 25 | #include <linux/init.h> |
| 26 | #include <linux/blkdev.h> |
| 27 | #include <linux/parser.h> |
| 28 | #include <linux/smp_lock.h> |
| 29 | #include <linux/buffer_head.h> |
Christoph Hellwig | a569425 | 2007-07-17 04:04:28 -0700 | [diff] [blame] | 30 | #include <linux/exportfs.h> |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 31 | #include <linux/vfs.h> |
| 32 | #include <linux/random.h> |
| 33 | #include <linux/mount.h> |
| 34 | #include <linux/namei.h> |
| 35 | #include <linux/quotaops.h> |
| 36 | #include <linux/seq_file.h> |
Theodore Ts'o | 9f6200b | 2008-09-23 09:18:24 -0400 | [diff] [blame] | 37 | #include <linux/proc_fs.h> |
Theodore Ts'o | ede86cc | 2008-10-05 20:50:06 -0400 | [diff] [blame] | 38 | #include <linux/marker.h> |
Vignesh Babu | 1330593 | 2007-07-18 09:11:02 -0400 | [diff] [blame] | 39 | #include <linux/log2.h> |
Andreas Dilger | 717d50e | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 40 | #include <linux/crc16.h> |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 41 | #include <asm/uaccess.h> |
| 42 | |
Christoph Hellwig | 3dcf545 | 2008-04-29 18:13:32 -0400 | [diff] [blame] | 43 | #include "ext4.h" |
| 44 | #include "ext4_jbd2.h" |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 45 | #include "xattr.h" |
| 46 | #include "acl.h" |
| 47 | #include "namei.h" |
Andreas Dilger | 717d50e | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 48 | #include "group.h" |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 49 | |
Theodore Ts'o | 9f6200b | 2008-09-23 09:18:24 -0400 | [diff] [blame] | 50 | struct proc_dir_entry *ext4_proc_root; |
| 51 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 52 | static int ext4_load_journal(struct super_block *, struct ext4_super_block *, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 53 | unsigned long journal_devnum); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 54 | static int ext4_create_journal(struct super_block *, struct ext4_super_block *, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 55 | unsigned int); |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 56 | static void ext4_commit_super(struct super_block *sb, |
| 57 | struct ext4_super_block *es, int sync); |
| 58 | static void ext4_mark_recovery_complete(struct super_block *sb, |
| 59 | struct ext4_super_block *es); |
| 60 | static void ext4_clear_journal_err(struct super_block *sb, |
| 61 | struct ext4_super_block *es); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 62 | static int ext4_sync_fs(struct super_block *sb, int wait); |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 63 | static const char *ext4_decode_error(struct super_block *sb, int errno, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 64 | char nbuf[16]); |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 65 | static int ext4_remount(struct super_block *sb, int *flags, char *data); |
| 66 | static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 67 | static void ext4_unlockfs(struct super_block *sb); |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 68 | static void ext4_write_super(struct super_block *sb); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 69 | static void ext4_write_super_lockfs(struct super_block *sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 70 | |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 71 | |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 72 | ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, |
| 73 | struct ext4_group_desc *bg) |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 74 | { |
Aneesh Kumar K.V | 3a14589 | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 75 | return le32_to_cpu(bg->bg_block_bitmap_lo) | |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 76 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
Aneesh Kumar K.V | 3a14589 | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 77 | (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] | 78 | } |
| 79 | |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 80 | ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, |
| 81 | struct ext4_group_desc *bg) |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 82 | { |
Aneesh Kumar K.V | 5272f83 | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 83 | return le32_to_cpu(bg->bg_inode_bitmap_lo) | |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 84 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
Aneesh Kumar K.V | 5272f83 | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 85 | (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] | 86 | } |
| 87 | |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 88 | ext4_fsblk_t ext4_inode_table(struct super_block *sb, |
| 89 | struct ext4_group_desc *bg) |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 90 | { |
Aneesh Kumar K.V | 5272f83 | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 91 | return le32_to_cpu(bg->bg_inode_table_lo) | |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 92 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
Aneesh Kumar K.V | 5272f83 | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 93 | (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] | 94 | } |
| 95 | |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 96 | void ext4_block_bitmap_set(struct super_block *sb, |
| 97 | struct ext4_group_desc *bg, ext4_fsblk_t blk) |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 98 | { |
Aneesh Kumar K.V | 3a14589 | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 99 | bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 100 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
| 101 | bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 102 | } |
| 103 | |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 104 | void ext4_inode_bitmap_set(struct super_block *sb, |
| 105 | struct ext4_group_desc *bg, ext4_fsblk_t blk) |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 106 | { |
Aneesh Kumar K.V | 5272f83 | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 107 | bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 108 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
| 109 | bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 110 | } |
| 111 | |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 112 | void ext4_inode_table_set(struct super_block *sb, |
| 113 | struct ext4_group_desc *bg, ext4_fsblk_t blk) |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 114 | { |
Aneesh Kumar K.V | 5272f83 | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 115 | bg->bg_inode_table_lo = cpu_to_le32((u32)blk); |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 116 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
| 117 | bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 118 | } |
| 119 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 120 | /* |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 121 | * Wrappers for jbd2_journal_start/end. |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 122 | * |
| 123 | * The only special thing we need to do here is to make sure that all |
| 124 | * journal_end calls result in the superblock being marked dirty, so |
| 125 | * that sync() will call the filesystem's write_super callback if |
| 126 | * appropriate. |
| 127 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 128 | handle_t *ext4_journal_start_sb(struct super_block *sb, int nblocks) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 129 | { |
| 130 | journal_t *journal; |
| 131 | |
| 132 | if (sb->s_flags & MS_RDONLY) |
| 133 | return ERR_PTR(-EROFS); |
| 134 | |
| 135 | /* Special case here: if the journal has aborted behind our |
| 136 | * backs (eg. EIO in the commit thread), then we still need to |
| 137 | * take the FS itself readonly cleanly. */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 138 | journal = EXT4_SB(sb)->s_journal; |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 139 | if (journal) { |
| 140 | if (is_journal_aborted(journal)) { |
| 141 | ext4_abort(sb, __func__, |
| 142 | "Detected aborted journal"); |
| 143 | return ERR_PTR(-EROFS); |
| 144 | } |
| 145 | return jbd2_journal_start(journal, nblocks); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 146 | } |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 147 | /* |
| 148 | * We're not journaling, return the appropriate indication. |
| 149 | */ |
| 150 | current->journal_info = EXT4_NOJOURNAL_HANDLE; |
| 151 | return current->journal_info; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 152 | } |
| 153 | |
| 154 | /* |
| 155 | * 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] | 156 | * jbd2_journal_stop calls result in the superblock being marked dirty, so |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 157 | * that sync() will call the filesystem's write_super callback if |
| 158 | * appropriate. |
| 159 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 160 | int __ext4_journal_stop(const char *where, handle_t *handle) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 161 | { |
| 162 | struct super_block *sb; |
| 163 | int err; |
| 164 | int rc; |
| 165 | |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 166 | if (!ext4_handle_valid(handle)) { |
| 167 | /* |
| 168 | * Do this here since we don't call jbd2_journal_stop() in |
| 169 | * no-journal mode. |
| 170 | */ |
| 171 | current->journal_info = NULL; |
| 172 | return 0; |
| 173 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 174 | sb = handle->h_transaction->t_journal->j_private; |
| 175 | err = handle->h_err; |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 176 | rc = jbd2_journal_stop(handle); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 177 | |
| 178 | if (!err) |
| 179 | err = rc; |
| 180 | if (err) |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 181 | __ext4_std_error(sb, where, err); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 182 | return err; |
| 183 | } |
| 184 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 185 | void ext4_journal_abort_handle(const char *caller, const char *err_fn, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 186 | struct buffer_head *bh, handle_t *handle, int err) |
| 187 | { |
| 188 | char nbuf[16]; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 189 | const char *errstr = ext4_decode_error(NULL, err, nbuf); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 190 | |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 191 | BUG_ON(!ext4_handle_valid(handle)); |
| 192 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 193 | if (bh) |
| 194 | BUFFER_TRACE(bh, "abort"); |
| 195 | |
| 196 | if (!handle->h_err) |
| 197 | handle->h_err = err; |
| 198 | |
| 199 | if (is_handle_aborted(handle)) |
| 200 | return; |
| 201 | |
| 202 | printk(KERN_ERR "%s: aborting transaction: %s in %s\n", |
| 203 | caller, errstr, err_fn); |
| 204 | |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 205 | jbd2_journal_abort_handle(handle); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 206 | } |
| 207 | |
| 208 | /* Deal with the reporting of failure conditions on a filesystem such as |
| 209 | * inconsistencies detected or read IO failures. |
| 210 | * |
| 211 | * 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] | 212 | * superblock. That is not possible on ext4, because we may have other |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 213 | * write ordering constraints on the superblock which prevent us from |
| 214 | * writing it out straight away; and given that the journal is about to |
| 215 | * be aborted, we can't rely on the current, or future, transactions to |
| 216 | * write out the superblock safely. |
| 217 | * |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 218 | * We'll just use the jbd2_journal_abort() error code to record an error in |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 219 | * the journal instead. On recovery, the journal will compain about |
| 220 | * that error until we've noted it down and cleared it. |
| 221 | */ |
| 222 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 223 | static void ext4_handle_error(struct super_block *sb) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 224 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 225 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 226 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 227 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; |
| 228 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 229 | |
| 230 | if (sb->s_flags & MS_RDONLY) |
| 231 | return; |
| 232 | |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 233 | if (!test_opt(sb, ERRORS_CONT)) { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 234 | journal_t *journal = EXT4_SB(sb)->s_journal; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 235 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 236 | EXT4_SB(sb)->s_mount_opt |= EXT4_MOUNT_ABORT; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 237 | if (journal) |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 238 | jbd2_journal_abort(journal, -EIO); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 239 | } |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 240 | if (test_opt(sb, ERRORS_RO)) { |
| 241 | printk(KERN_CRIT "Remounting filesystem read-only\n"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 242 | sb->s_flags |= MS_RDONLY; |
| 243 | } |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 244 | ext4_commit_super(sb, es, 1); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 245 | if (test_opt(sb, ERRORS_PANIC)) |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 246 | panic("EXT4-fs (device %s): panic forced after error\n", |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 247 | sb->s_id); |
| 248 | } |
| 249 | |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 250 | void ext4_error(struct super_block *sb, const char *function, |
| 251 | const char *fmt, ...) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 252 | { |
| 253 | va_list args; |
| 254 | |
| 255 | va_start(args, fmt); |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 256 | printk(KERN_CRIT "EXT4-fs error (device %s): %s: ", sb->s_id, function); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 257 | vprintk(fmt, args); |
| 258 | printk("\n"); |
| 259 | va_end(args); |
| 260 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 261 | ext4_handle_error(sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 262 | } |
| 263 | |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 264 | static const char *ext4_decode_error(struct super_block *sb, int errno, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 265 | char nbuf[16]) |
| 266 | { |
| 267 | char *errstr = NULL; |
| 268 | |
| 269 | switch (errno) { |
| 270 | case -EIO: |
| 271 | errstr = "IO failure"; |
| 272 | break; |
| 273 | case -ENOMEM: |
| 274 | errstr = "Out of memory"; |
| 275 | break; |
| 276 | case -EROFS: |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 277 | if (!sb || EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 278 | errstr = "Journal has aborted"; |
| 279 | else |
| 280 | errstr = "Readonly filesystem"; |
| 281 | break; |
| 282 | default: |
| 283 | /* If the caller passed in an extra buffer for unknown |
| 284 | * errors, textualise them now. Else we just return |
| 285 | * NULL. */ |
| 286 | if (nbuf) { |
| 287 | /* Check for truncated error codes... */ |
| 288 | if (snprintf(nbuf, 16, "error %d", -errno) >= 0) |
| 289 | errstr = nbuf; |
| 290 | } |
| 291 | break; |
| 292 | } |
| 293 | |
| 294 | return errstr; |
| 295 | } |
| 296 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 297 | /* __ext4_std_error decodes expected errors from journaling functions |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 298 | * automatically and invokes the appropriate error response. */ |
| 299 | |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 300 | void __ext4_std_error(struct super_block *sb, const char *function, int errno) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 301 | { |
| 302 | char nbuf[16]; |
| 303 | const char *errstr; |
| 304 | |
| 305 | /* Special case: if the error is EROFS, and we're not already |
| 306 | * inside a transaction, then there's really no point in logging |
| 307 | * an error. */ |
| 308 | if (errno == -EROFS && journal_current_handle() == NULL && |
| 309 | (sb->s_flags & MS_RDONLY)) |
| 310 | return; |
| 311 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 312 | errstr = ext4_decode_error(sb, errno, nbuf); |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 313 | printk(KERN_CRIT "EXT4-fs error (device %s) in %s: %s\n", |
| 314 | sb->s_id, function, errstr); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 315 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 316 | ext4_handle_error(sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 317 | } |
| 318 | |
| 319 | /* |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 320 | * ext4_abort is a much stronger failure handler than ext4_error. The |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 321 | * abort function may be used to deal with unrecoverable failures such |
| 322 | * as journal IO errors or ENOMEM at a critical moment in log management. |
| 323 | * |
| 324 | * We unconditionally force the filesystem into an ABORT|READONLY state, |
| 325 | * unless the error response on the fs has been set to panic in which |
| 326 | * case we take the easy way out and panic immediately. |
| 327 | */ |
| 328 | |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 329 | void ext4_abort(struct super_block *sb, const char *function, |
| 330 | const char *fmt, ...) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 331 | { |
| 332 | va_list args; |
| 333 | |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 334 | printk(KERN_CRIT "ext4_abort called.\n"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 335 | |
| 336 | va_start(args, fmt); |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 337 | printk(KERN_CRIT "EXT4-fs error (device %s): %s: ", sb->s_id, function); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 338 | vprintk(fmt, args); |
| 339 | printk("\n"); |
| 340 | va_end(args); |
| 341 | |
| 342 | if (test_opt(sb, ERRORS_PANIC)) |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 343 | panic("EXT4-fs panic from previous error\n"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 344 | |
| 345 | if (sb->s_flags & MS_RDONLY) |
| 346 | return; |
| 347 | |
| 348 | printk(KERN_CRIT "Remounting filesystem read-only\n"); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 349 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 350 | sb->s_flags |= MS_RDONLY; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 351 | EXT4_SB(sb)->s_mount_opt |= EXT4_MOUNT_ABORT; |
Hidehiro Kawai | ef2cabf | 2008-10-27 22:53:05 -0400 | [diff] [blame] | 352 | if (EXT4_SB(sb)->s_journal) |
| 353 | jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 354 | } |
| 355 | |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 356 | void ext4_warning(struct super_block *sb, const char *function, |
| 357 | const char *fmt, ...) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 358 | { |
| 359 | va_list args; |
| 360 | |
| 361 | va_start(args, fmt); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 362 | printk(KERN_WARNING "EXT4-fs warning (device %s): %s: ", |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 363 | sb->s_id, function); |
| 364 | vprintk(fmt, args); |
| 365 | printk("\n"); |
| 366 | va_end(args); |
| 367 | } |
| 368 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 369 | void ext4_update_dynamic_rev(struct super_block *sb) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 370 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 371 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 372 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 373 | if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 374 | return; |
| 375 | |
Harvey Harrison | 46e665e | 2008-04-17 10:38:59 -0400 | [diff] [blame] | 376 | ext4_warning(sb, __func__, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 377 | "updating to rev %d because of new feature flag, " |
| 378 | "running e2fsck is recommended", |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 379 | EXT4_DYNAMIC_REV); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 380 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 381 | es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); |
| 382 | es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); |
| 383 | es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 384 | /* leave es->s_feature_*compat flags alone */ |
| 385 | /* es->s_uuid will be set by e2fsck if empty */ |
| 386 | |
| 387 | /* |
| 388 | * The rest of the superblock fields should be zero, and if not it |
| 389 | * means they are likely already in use, so leave them alone. We |
| 390 | * can leave it up to e2fsck to clean up any inconsistencies there. |
| 391 | */ |
| 392 | } |
| 393 | |
| 394 | /* |
| 395 | * Open the external journal device |
| 396 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 397 | static struct block_device *ext4_blkdev_get(dev_t dev) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 398 | { |
| 399 | struct block_device *bdev; |
| 400 | char b[BDEVNAME_SIZE]; |
| 401 | |
| 402 | bdev = open_by_devnum(dev, FMODE_READ|FMODE_WRITE); |
| 403 | if (IS_ERR(bdev)) |
| 404 | goto fail; |
| 405 | return bdev; |
| 406 | |
| 407 | fail: |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 408 | printk(KERN_ERR "EXT4: failed to open journal device %s: %ld\n", |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 409 | __bdevname(dev, b), PTR_ERR(bdev)); |
| 410 | return NULL; |
| 411 | } |
| 412 | |
| 413 | /* |
| 414 | * Release the journal device |
| 415 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 416 | static int ext4_blkdev_put(struct block_device *bdev) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 417 | { |
| 418 | bd_release(bdev); |
Al Viro | 9a1c354 | 2008-02-22 20:40:24 -0500 | [diff] [blame] | 419 | return blkdev_put(bdev, FMODE_READ|FMODE_WRITE); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 420 | } |
| 421 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 422 | static int ext4_blkdev_remove(struct ext4_sb_info *sbi) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 423 | { |
| 424 | struct block_device *bdev; |
| 425 | int ret = -ENODEV; |
| 426 | |
| 427 | bdev = sbi->journal_bdev; |
| 428 | if (bdev) { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 429 | ret = ext4_blkdev_put(bdev); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 430 | sbi->journal_bdev = NULL; |
| 431 | } |
| 432 | return ret; |
| 433 | } |
| 434 | |
| 435 | static inline struct inode *orphan_list_entry(struct list_head *l) |
| 436 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 437 | return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 438 | } |
| 439 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 440 | 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] | 441 | { |
| 442 | struct list_head *l; |
| 443 | |
| 444 | printk(KERN_ERR "sb orphan head is %d\n", |
| 445 | le32_to_cpu(sbi->s_es->s_last_orphan)); |
| 446 | |
| 447 | printk(KERN_ERR "sb_info orphan list:\n"); |
| 448 | list_for_each(l, &sbi->s_orphan) { |
| 449 | struct inode *inode = orphan_list_entry(l); |
| 450 | printk(KERN_ERR " " |
| 451 | "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", |
| 452 | inode->i_sb->s_id, inode->i_ino, inode, |
| 453 | inode->i_mode, inode->i_nlink, |
| 454 | NEXT_ORPHAN(inode)); |
| 455 | } |
| 456 | } |
| 457 | |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 458 | static void ext4_put_super(struct super_block *sb) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 459 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 460 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
| 461 | struct ext4_super_block *es = sbi->s_es; |
Hidehiro Kawai | ef2cabf | 2008-10-27 22:53:05 -0400 | [diff] [blame] | 462 | int i, err; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 463 | |
Alex Tomas | c9de560 | 2008-01-29 00:19:52 -0500 | [diff] [blame] | 464 | ext4_mb_release(sb); |
Alex Tomas | a86c618 | 2006-10-11 01:21:03 -0700 | [diff] [blame] | 465 | ext4_ext_release(sb); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 466 | ext4_xattr_put_super(sb); |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 467 | if (sbi->s_journal) { |
| 468 | err = jbd2_journal_destroy(sbi->s_journal); |
| 469 | sbi->s_journal = NULL; |
| 470 | if (err < 0) |
| 471 | ext4_abort(sb, __func__, |
| 472 | "Couldn't clean up the journal"); |
| 473 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 474 | if (!(sb->s_flags & MS_RDONLY)) { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 475 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 476 | es->s_state = cpu_to_le16(sbi->s_mount_state); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 477 | ext4_commit_super(sb, es, 1); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 478 | } |
Theodore Ts'o | 240799c | 2008-10-09 23:53:47 -0400 | [diff] [blame] | 479 | if (sbi->s_proc) { |
| 480 | remove_proc_entry("inode_readahead_blks", sbi->s_proc); |
Theodore Ts'o | 9f6200b | 2008-09-23 09:18:24 -0400 | [diff] [blame] | 481 | remove_proc_entry(sb->s_id, ext4_proc_root); |
Theodore Ts'o | 240799c | 2008-10-09 23:53:47 -0400 | [diff] [blame] | 482 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 483 | |
| 484 | for (i = 0; i < sbi->s_gdb_count; i++) |
| 485 | brelse(sbi->s_group_desc[i]); |
| 486 | kfree(sbi->s_group_desc); |
Jose R. Santos | 772cb7c | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 487 | kfree(sbi->s_flex_groups); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 488 | percpu_counter_destroy(&sbi->s_freeblocks_counter); |
| 489 | percpu_counter_destroy(&sbi->s_freeinodes_counter); |
| 490 | percpu_counter_destroy(&sbi->s_dirs_counter); |
Aneesh Kumar K.V | 6bc6e63 | 2008-10-10 09:39:00 -0400 | [diff] [blame] | 491 | percpu_counter_destroy(&sbi->s_dirtyblocks_counter); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 492 | brelse(sbi->s_sbh); |
| 493 | #ifdef CONFIG_QUOTA |
| 494 | for (i = 0; i < MAXQUOTAS; i++) |
| 495 | kfree(sbi->s_qf_names[i]); |
| 496 | #endif |
| 497 | |
| 498 | /* Debugging code just in case the in-memory inode orphan list |
| 499 | * isn't empty. The on-disk one can be non-empty if we've |
| 500 | * detected an error and taken the fs readonly, but the |
| 501 | * in-memory list had better be clean by this point. */ |
| 502 | if (!list_empty(&sbi->s_orphan)) |
| 503 | dump_orphan_list(sb, sbi); |
| 504 | J_ASSERT(list_empty(&sbi->s_orphan)); |
| 505 | |
Peter Zijlstra | f98393a | 2007-05-06 14:49:54 -0700 | [diff] [blame] | 506 | invalidate_bdev(sb->s_bdev); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 507 | if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { |
| 508 | /* |
| 509 | * Invalidate the journal device's buffers. We don't want them |
| 510 | * floating about in memory - the physical journal device may |
| 511 | * hotswapped, and it breaks the `ro-after' testing code. |
| 512 | */ |
| 513 | sync_blockdev(sbi->journal_bdev); |
Peter Zijlstra | f98393a | 2007-05-06 14:49:54 -0700 | [diff] [blame] | 514 | invalidate_bdev(sbi->journal_bdev); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 515 | ext4_blkdev_remove(sbi); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 516 | } |
| 517 | sb->s_fs_info = NULL; |
| 518 | kfree(sbi); |
| 519 | return; |
| 520 | } |
| 521 | |
Christoph Lameter | e18b890 | 2006-12-06 20:33:20 -0800 | [diff] [blame] | 522 | static struct kmem_cache *ext4_inode_cachep; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 523 | |
| 524 | /* |
| 525 | * Called inside transaction, so use GFP_NOFS |
| 526 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 527 | static struct inode *ext4_alloc_inode(struct super_block *sb) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 528 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 529 | struct ext4_inode_info *ei; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 530 | |
Christoph Lameter | e6b4f8d | 2006-12-06 20:33:14 -0800 | [diff] [blame] | 531 | ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 532 | if (!ei) |
| 533 | return NULL; |
Theodore Ts'o | 03010a3 | 2008-10-10 20:02:48 -0400 | [diff] [blame] | 534 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 535 | ei->i_acl = EXT4_ACL_NOT_CACHED; |
| 536 | ei->i_default_acl = EXT4_ACL_NOT_CACHED; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 537 | #endif |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 538 | ei->vfs_inode.i_version = 1; |
Aneesh Kumar K.V | 91246c0 | 2008-08-19 21:14:52 -0400 | [diff] [blame] | 539 | ei->vfs_inode.i_data.writeback_index = 0; |
Alex Tomas | a86c618 | 2006-10-11 01:21:03 -0700 | [diff] [blame] | 540 | memset(&ei->i_cached_extent, 0, sizeof(struct ext4_ext_cache)); |
Alex Tomas | c9de560 | 2008-01-29 00:19:52 -0500 | [diff] [blame] | 541 | INIT_LIST_HEAD(&ei->i_prealloc_list); |
| 542 | spin_lock_init(&ei->i_prealloc_lock); |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 543 | /* |
| 544 | * Note: We can be called before EXT4_SB(sb)->s_journal is set, |
| 545 | * therefore it can be null here. Don't check it, just initialize |
| 546 | * jinode. |
| 547 | */ |
Jan Kara | 678aaf4 | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 548 | jbd2_journal_init_jbd_inode(&ei->jinode, &ei->vfs_inode); |
Mingming Cao | d2a1763 | 2008-07-14 17:52:37 -0400 | [diff] [blame] | 549 | ei->i_reserved_data_blocks = 0; |
| 550 | ei->i_reserved_meta_blocks = 0; |
| 551 | ei->i_allocated_meta_blocks = 0; |
| 552 | ei->i_delalloc_reserved_flag = 0; |
| 553 | spin_lock_init(&(ei->i_block_reservation_lock)); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 554 | return &ei->vfs_inode; |
| 555 | } |
| 556 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 557 | static void ext4_destroy_inode(struct inode *inode) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 558 | { |
Vasily Averin | 9f7dd93 | 2007-07-15 23:40:45 -0700 | [diff] [blame] | 559 | if (!list_empty(&(EXT4_I(inode)->i_orphan))) { |
| 560 | printk("EXT4 Inode %p: orphan list check failed!\n", |
| 561 | EXT4_I(inode)); |
| 562 | print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, |
| 563 | EXT4_I(inode), sizeof(struct ext4_inode_info), |
| 564 | true); |
| 565 | dump_stack(); |
| 566 | } |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 567 | kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 568 | } |
| 569 | |
Alexey Dobriyan | 51cc506 | 2008-07-25 19:45:34 -0700 | [diff] [blame] | 570 | static void init_once(void *foo) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 571 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 572 | struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 573 | |
Christoph Lameter | a35afb8 | 2007-05-16 22:10:57 -0700 | [diff] [blame] | 574 | INIT_LIST_HEAD(&ei->i_orphan); |
Theodore Ts'o | 03010a3 | 2008-10-10 20:02:48 -0400 | [diff] [blame] | 575 | #ifdef CONFIG_EXT4_FS_XATTR |
Christoph Lameter | a35afb8 | 2007-05-16 22:10:57 -0700 | [diff] [blame] | 576 | init_rwsem(&ei->xattr_sem); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 577 | #endif |
Aneesh Kumar K.V | 0e855ac | 2008-01-28 23:58:26 -0500 | [diff] [blame] | 578 | init_rwsem(&ei->i_data_sem); |
Christoph Lameter | a35afb8 | 2007-05-16 22:10:57 -0700 | [diff] [blame] | 579 | inode_init_once(&ei->vfs_inode); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 580 | } |
| 581 | |
| 582 | static int init_inodecache(void) |
| 583 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 584 | ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", |
| 585 | sizeof(struct ext4_inode_info), |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 586 | 0, (SLAB_RECLAIM_ACCOUNT| |
| 587 | SLAB_MEM_SPREAD), |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 588 | init_once); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 589 | if (ext4_inode_cachep == NULL) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 590 | return -ENOMEM; |
| 591 | return 0; |
| 592 | } |
| 593 | |
| 594 | static void destroy_inodecache(void) |
| 595 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 596 | kmem_cache_destroy(ext4_inode_cachep); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 597 | } |
| 598 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 599 | static void ext4_clear_inode(struct inode *inode) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 600 | { |
Theodore Ts'o | 03010a3 | 2008-10-10 20:02:48 -0400 | [diff] [blame] | 601 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 602 | if (EXT4_I(inode)->i_acl && |
| 603 | EXT4_I(inode)->i_acl != EXT4_ACL_NOT_CACHED) { |
| 604 | posix_acl_release(EXT4_I(inode)->i_acl); |
| 605 | EXT4_I(inode)->i_acl = EXT4_ACL_NOT_CACHED; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 606 | } |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 607 | if (EXT4_I(inode)->i_default_acl && |
| 608 | EXT4_I(inode)->i_default_acl != EXT4_ACL_NOT_CACHED) { |
| 609 | posix_acl_release(EXT4_I(inode)->i_default_acl); |
| 610 | EXT4_I(inode)->i_default_acl = EXT4_ACL_NOT_CACHED; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 611 | } |
| 612 | #endif |
Theodore Ts'o | c2ea3fd | 2008-10-10 09:40:52 -0400 | [diff] [blame] | 613 | ext4_discard_preallocations(inode); |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 614 | if (EXT4_JOURNAL(inode)) |
| 615 | jbd2_journal_release_jbd_inode(EXT4_SB(inode->i_sb)->s_journal, |
Jan Kara | 678aaf4 | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 616 | &EXT4_I(inode)->jinode); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 617 | } |
| 618 | |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 619 | static inline void ext4_show_quota_options(struct seq_file *seq, |
| 620 | struct super_block *sb) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 621 | { |
| 622 | #if defined(CONFIG_QUOTA) |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 623 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 624 | |
| 625 | if (sbi->s_jquota_fmt) |
| 626 | seq_printf(seq, ",jqfmt=%s", |
Theodore Ts'o | af5bc92 | 2008-09-08 22:25:24 -0400 | [diff] [blame] | 627 | (sbi->s_jquota_fmt == QFMT_VFS_OLD) ? "vfsold" : "vfsv0"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 628 | |
| 629 | if (sbi->s_qf_names[USRQUOTA]) |
| 630 | seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); |
| 631 | |
| 632 | if (sbi->s_qf_names[GRPQUOTA]) |
| 633 | seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); |
| 634 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 635 | if (sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 636 | seq_puts(seq, ",usrquota"); |
| 637 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 638 | if (sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 639 | seq_puts(seq, ",grpquota"); |
| 640 | #endif |
| 641 | } |
| 642 | |
Miklos Szeredi | d9c9bef1 | 2007-10-16 23:26:27 -0700 | [diff] [blame] | 643 | /* |
| 644 | * Show an option if |
| 645 | * - it's set to a non-default value OR |
| 646 | * - if the per-sb default is different from the global default |
| 647 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 648 | static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 649 | { |
Aneesh Kumar K.V | aa22df2 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 650 | int def_errors; |
| 651 | unsigned long def_mount_opts; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 652 | struct super_block *sb = vfs->mnt_sb; |
Miklos Szeredi | d9c9bef1 | 2007-10-16 23:26:27 -0700 | [diff] [blame] | 653 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
| 654 | struct ext4_super_block *es = sbi->s_es; |
Miklos Szeredi | d9c9bef1 | 2007-10-16 23:26:27 -0700 | [diff] [blame] | 655 | |
| 656 | 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] | 657 | def_errors = le16_to_cpu(es->s_errors); |
Miklos Szeredi | d9c9bef1 | 2007-10-16 23:26:27 -0700 | [diff] [blame] | 658 | |
| 659 | if (sbi->s_sb_block != 1) |
| 660 | seq_printf(seq, ",sb=%llu", sbi->s_sb_block); |
| 661 | if (test_opt(sb, MINIX_DF)) |
| 662 | seq_puts(seq, ",minixdf"); |
Aneesh Kumar K.V | aa22df2 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 663 | if (test_opt(sb, GRPID) && !(def_mount_opts & EXT4_DEFM_BSDGROUPS)) |
Miklos Szeredi | d9c9bef1 | 2007-10-16 23:26:27 -0700 | [diff] [blame] | 664 | seq_puts(seq, ",grpid"); |
| 665 | if (!test_opt(sb, GRPID) && (def_mount_opts & EXT4_DEFM_BSDGROUPS)) |
| 666 | seq_puts(seq, ",nogrpid"); |
| 667 | if (sbi->s_resuid != EXT4_DEF_RESUID || |
| 668 | le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) { |
| 669 | seq_printf(seq, ",resuid=%u", sbi->s_resuid); |
| 670 | } |
| 671 | if (sbi->s_resgid != EXT4_DEF_RESGID || |
| 672 | le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) { |
| 673 | seq_printf(seq, ",resgid=%u", sbi->s_resgid); |
| 674 | } |
Aneesh Kumar K.V | bb4f397 | 2008-01-28 23:58:26 -0500 | [diff] [blame] | 675 | if (test_opt(sb, ERRORS_RO)) { |
Miklos Szeredi | d9c9bef1 | 2007-10-16 23:26:27 -0700 | [diff] [blame] | 676 | if (def_errors == EXT4_ERRORS_PANIC || |
Aneesh Kumar K.V | bb4f397 | 2008-01-28 23:58:26 -0500 | [diff] [blame] | 677 | def_errors == EXT4_ERRORS_CONTINUE) { |
| 678 | seq_puts(seq, ",errors=remount-ro"); |
Miklos Szeredi | d9c9bef1 | 2007-10-16 23:26:27 -0700 | [diff] [blame] | 679 | } |
| 680 | } |
Aneesh Kumar K.V | aa22df2 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 681 | 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] | 682 | seq_puts(seq, ",errors=continue"); |
Aneesh Kumar K.V | aa22df2 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 683 | if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) |
Miklos Szeredi | d9c9bef1 | 2007-10-16 23:26:27 -0700 | [diff] [blame] | 684 | seq_puts(seq, ",errors=panic"); |
Aneesh Kumar K.V | aa22df2 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 685 | if (test_opt(sb, NO_UID32) && !(def_mount_opts & EXT4_DEFM_UID16)) |
Miklos Szeredi | d9c9bef1 | 2007-10-16 23:26:27 -0700 | [diff] [blame] | 686 | seq_puts(seq, ",nouid32"); |
Aneesh Kumar K.V | aa22df2 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 687 | if (test_opt(sb, DEBUG) && !(def_mount_opts & EXT4_DEFM_DEBUG)) |
Miklos Szeredi | d9c9bef1 | 2007-10-16 23:26:27 -0700 | [diff] [blame] | 688 | seq_puts(seq, ",debug"); |
| 689 | if (test_opt(sb, OLDALLOC)) |
| 690 | seq_puts(seq, ",oldalloc"); |
Theodore Ts'o | 03010a3 | 2008-10-10 20:02:48 -0400 | [diff] [blame] | 691 | #ifdef CONFIG_EXT4_FS_XATTR |
Aneesh Kumar K.V | aa22df2 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 692 | if (test_opt(sb, XATTR_USER) && |
| 693 | !(def_mount_opts & EXT4_DEFM_XATTR_USER)) |
Miklos Szeredi | d9c9bef1 | 2007-10-16 23:26:27 -0700 | [diff] [blame] | 694 | seq_puts(seq, ",user_xattr"); |
| 695 | if (!test_opt(sb, XATTR_USER) && |
| 696 | (def_mount_opts & EXT4_DEFM_XATTR_USER)) { |
| 697 | seq_puts(seq, ",nouser_xattr"); |
| 698 | } |
| 699 | #endif |
Theodore Ts'o | 03010a3 | 2008-10-10 20:02:48 -0400 | [diff] [blame] | 700 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
Aneesh Kumar K.V | aa22df2 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 701 | if (test_opt(sb, POSIX_ACL) && !(def_mount_opts & EXT4_DEFM_ACL)) |
Miklos Szeredi | d9c9bef1 | 2007-10-16 23:26:27 -0700 | [diff] [blame] | 702 | seq_puts(seq, ",acl"); |
| 703 | if (!test_opt(sb, POSIX_ACL) && (def_mount_opts & EXT4_DEFM_ACL)) |
| 704 | seq_puts(seq, ",noacl"); |
| 705 | #endif |
| 706 | if (!test_opt(sb, RESERVATION)) |
| 707 | seq_puts(seq, ",noreservation"); |
Theodore Ts'o | 3077384 | 2009-01-03 20:27:38 -0500 | [diff] [blame] | 708 | if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { |
Miklos Szeredi | d9c9bef1 | 2007-10-16 23:26:27 -0700 | [diff] [blame] | 709 | seq_printf(seq, ",commit=%u", |
| 710 | (unsigned) (sbi->s_commit_interval / HZ)); |
| 711 | } |
Theodore Ts'o | 3077384 | 2009-01-03 20:27:38 -0500 | [diff] [blame] | 712 | if (sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) { |
| 713 | seq_printf(seq, ",min_batch_time=%u", |
| 714 | (unsigned) sbi->s_min_batch_time); |
| 715 | } |
| 716 | if (sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) { |
| 717 | seq_printf(seq, ",max_batch_time=%u", |
| 718 | (unsigned) sbi->s_min_batch_time); |
| 719 | } |
| 720 | |
Eric Sandeen | 571640c | 2008-05-26 12:29:46 -0400 | [diff] [blame] | 721 | /* |
| 722 | * We're changing the default of barrier mount option, so |
| 723 | * let's always display its mount state so it's clear what its |
| 724 | * status is. |
| 725 | */ |
| 726 | seq_puts(seq, ",barrier="); |
| 727 | seq_puts(seq, test_opt(sb, BARRIER) ? "1" : "0"); |
Theodore Ts'o | cd0b6a3 | 2008-05-26 10:28:28 -0400 | [diff] [blame] | 728 | if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) |
| 729 | seq_puts(seq, ",journal_async_commit"); |
Miklos Szeredi | d9c9bef1 | 2007-10-16 23:26:27 -0700 | [diff] [blame] | 730 | if (test_opt(sb, NOBH)) |
| 731 | seq_puts(seq, ",nobh"); |
| 732 | if (!test_opt(sb, EXTENTS)) |
| 733 | seq_puts(seq, ",noextents"); |
Jean Noel Cordenner | 25ec56b | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 734 | if (test_opt(sb, I_VERSION)) |
| 735 | seq_puts(seq, ",i_version"); |
Aneesh Kumar K.V | dd919b9 | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 736 | if (!test_opt(sb, DELALLOC)) |
| 737 | seq_puts(seq, ",nodelalloc"); |
| 738 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 739 | |
Miklos Szeredi | cb45bbe | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 740 | if (sbi->s_stripe) |
| 741 | seq_printf(seq, ",stripe=%lu", sbi->s_stripe); |
Aneesh Kumar K.V | aa22df2 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 742 | /* |
| 743 | * journal mode get enabled in different ways |
| 744 | * So just print the value even if we didn't specify it |
| 745 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 746 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 747 | seq_puts(seq, ",data=journal"); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 748 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 749 | seq_puts(seq, ",data=ordered"); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 750 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 751 | seq_puts(seq, ",data=writeback"); |
| 752 | |
Theodore Ts'o | 240799c | 2008-10-09 23:53:47 -0400 | [diff] [blame] | 753 | if (sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) |
| 754 | seq_printf(seq, ",inode_readahead_blks=%u", |
| 755 | sbi->s_inode_readahead_blks); |
| 756 | |
Hidehiro Kawai | 5bf5683 | 2008-10-10 22:12:43 -0400 | [diff] [blame] | 757 | if (test_opt(sb, DATA_ERR_ABORT)) |
| 758 | seq_puts(seq, ",data_err=abort"); |
| 759 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 760 | ext4_show_quota_options(seq, sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 761 | return 0; |
| 762 | } |
| 763 | |
| 764 | |
Christoph Hellwig | 1b961ac | 2007-10-21 16:42:08 -0700 | [diff] [blame] | 765 | static struct inode *ext4_nfs_get_inode(struct super_block *sb, |
| 766 | u64 ino, u32 generation) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 767 | { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 768 | struct inode *inode; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 769 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 770 | if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 771 | return ERR_PTR(-ESTALE); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 772 | 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] | 773 | return ERR_PTR(-ESTALE); |
| 774 | |
| 775 | /* iget isn't really right if the inode is currently unallocated!! |
| 776 | * |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 777 | * 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] | 778 | * deleted, so we should be safe. |
| 779 | * |
| 780 | * Currently we don't know the generation for parent directory, so |
| 781 | * a generation of 0 means "accept any" |
| 782 | */ |
David Howells | 1d1fe1e | 2008-02-07 00:15:37 -0800 | [diff] [blame] | 783 | inode = ext4_iget(sb, ino); |
| 784 | if (IS_ERR(inode)) |
| 785 | return ERR_CAST(inode); |
| 786 | if (generation && inode->i_generation != generation) { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 787 | iput(inode); |
| 788 | return ERR_PTR(-ESTALE); |
| 789 | } |
Christoph Hellwig | 1b961ac | 2007-10-21 16:42:08 -0700 | [diff] [blame] | 790 | |
| 791 | return inode; |
| 792 | } |
| 793 | |
| 794 | static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, |
| 795 | int fh_len, int fh_type) |
| 796 | { |
| 797 | return generic_fh_to_dentry(sb, fid, fh_len, fh_type, |
| 798 | ext4_nfs_get_inode); |
| 799 | } |
| 800 | |
| 801 | static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, |
| 802 | int fh_len, int fh_type) |
| 803 | { |
| 804 | return generic_fh_to_parent(sb, fid, fh_len, fh_type, |
| 805 | ext4_nfs_get_inode); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 806 | } |
| 807 | |
| 808 | #ifdef CONFIG_QUOTA |
Theodore Ts'o | af5bc92 | 2008-09-08 22:25:24 -0400 | [diff] [blame] | 809 | #define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group") |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 810 | #define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 811 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 812 | static int ext4_dquot_initialize(struct inode *inode, int type); |
| 813 | static int ext4_dquot_drop(struct inode *inode); |
| 814 | static int ext4_write_dquot(struct dquot *dquot); |
| 815 | static int ext4_acquire_dquot(struct dquot *dquot); |
| 816 | static int ext4_release_dquot(struct dquot *dquot); |
| 817 | static int ext4_mark_dquot_dirty(struct dquot *dquot); |
| 818 | static int ext4_write_info(struct super_block *sb, int type); |
Jan Kara | 6f28e08 | 2008-04-28 02:14:34 -0700 | [diff] [blame] | 819 | static int ext4_quota_on(struct super_block *sb, int type, int format_id, |
| 820 | char *path, int remount); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 821 | static int ext4_quota_on_mount(struct super_block *sb, int type); |
| 822 | 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] | 823 | size_t len, loff_t off); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 824 | static ssize_t ext4_quota_write(struct super_block *sb, int type, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 825 | const char *data, size_t len, loff_t off); |
| 826 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 827 | static struct dquot_operations ext4_quota_operations = { |
| 828 | .initialize = ext4_dquot_initialize, |
| 829 | .drop = ext4_dquot_drop, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 830 | .alloc_space = dquot_alloc_space, |
| 831 | .alloc_inode = dquot_alloc_inode, |
| 832 | .free_space = dquot_free_space, |
| 833 | .free_inode = dquot_free_inode, |
| 834 | .transfer = dquot_transfer, |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 835 | .write_dquot = ext4_write_dquot, |
| 836 | .acquire_dquot = ext4_acquire_dquot, |
| 837 | .release_dquot = ext4_release_dquot, |
| 838 | .mark_dirty = ext4_mark_dquot_dirty, |
| 839 | .write_info = ext4_write_info |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 840 | }; |
| 841 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 842 | static struct quotactl_ops ext4_qctl_operations = { |
| 843 | .quota_on = ext4_quota_on, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 844 | .quota_off = vfs_quota_off, |
| 845 | .quota_sync = vfs_quota_sync, |
| 846 | .get_info = vfs_get_dqinfo, |
| 847 | .set_info = vfs_set_dqinfo, |
| 848 | .get_dqblk = vfs_get_dqblk, |
| 849 | .set_dqblk = vfs_set_dqblk |
| 850 | }; |
| 851 | #endif |
| 852 | |
Josef 'Jeff' Sipek | ee9b6d6 | 2007-02-12 00:55:41 -0800 | [diff] [blame] | 853 | static const struct super_operations ext4_sops = { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 854 | .alloc_inode = ext4_alloc_inode, |
| 855 | .destroy_inode = ext4_destroy_inode, |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 856 | .write_inode = ext4_write_inode, |
| 857 | .dirty_inode = ext4_dirty_inode, |
| 858 | .delete_inode = ext4_delete_inode, |
| 859 | .put_super = ext4_put_super, |
| 860 | .write_super = ext4_write_super, |
| 861 | .sync_fs = ext4_sync_fs, |
| 862 | .write_super_lockfs = ext4_write_super_lockfs, |
| 863 | .unlockfs = ext4_unlockfs, |
| 864 | .statfs = ext4_statfs, |
| 865 | .remount_fs = ext4_remount, |
| 866 | .clear_inode = ext4_clear_inode, |
| 867 | .show_options = ext4_show_options, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 868 | #ifdef CONFIG_QUOTA |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 869 | .quota_read = ext4_quota_read, |
| 870 | .quota_write = ext4_quota_write, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 871 | #endif |
| 872 | }; |
| 873 | |
Christoph Hellwig | 3965516 | 2007-10-21 16:42:17 -0700 | [diff] [blame] | 874 | static const struct export_operations ext4_export_ops = { |
Christoph Hellwig | 1b961ac | 2007-10-21 16:42:08 -0700 | [diff] [blame] | 875 | .fh_to_dentry = ext4_fh_to_dentry, |
| 876 | .fh_to_parent = ext4_fh_to_parent, |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 877 | .get_parent = ext4_get_parent, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 878 | }; |
| 879 | |
| 880 | enum { |
| 881 | Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, |
| 882 | 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] | 883 | Opt_nouid32, Opt_debug, Opt_oldalloc, Opt_orlov, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 884 | Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, |
| 885 | Opt_reservation, Opt_noreservation, Opt_noload, Opt_nobh, Opt_bh, |
Theodore Ts'o | 3077384 | 2009-01-03 20:27:38 -0500 | [diff] [blame] | 886 | Opt_commit, Opt_min_batch_time, Opt_max_batch_time, |
| 887 | Opt_journal_update, Opt_journal_inum, Opt_journal_dev, |
Girish Shilamkar | 818d276 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 888 | Opt_journal_checksum, Opt_journal_async_commit, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 889 | Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, |
Hidehiro Kawai | 5bf5683 | 2008-10-10 22:12:43 -0400 | [diff] [blame] | 890 | Opt_data_err_abort, Opt_data_err_ignore, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 891 | Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, |
| 892 | Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_quota, Opt_noquota, |
| 893 | Opt_ignore, Opt_barrier, Opt_err, Opt_resize, Opt_usrquota, |
Jean Noel Cordenner | 25ec56b | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 894 | Opt_grpquota, Opt_extents, Opt_noextents, Opt_i_version, |
Theodore Ts'o | 01436ef | 2008-10-17 07:22:35 -0400 | [diff] [blame] | 895 | Opt_stripe, Opt_delalloc, Opt_nodelalloc, |
Theodore Ts'o | 240799c | 2008-10-09 23:53:47 -0400 | [diff] [blame] | 896 | Opt_inode_readahead_blks |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 897 | }; |
| 898 | |
Steven Whitehouse | a447c09 | 2008-10-13 10:46:57 +0100 | [diff] [blame] | 899 | static const match_table_t tokens = { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 900 | {Opt_bsd_df, "bsddf"}, |
| 901 | {Opt_minix_df, "minixdf"}, |
| 902 | {Opt_grpid, "grpid"}, |
| 903 | {Opt_grpid, "bsdgroups"}, |
| 904 | {Opt_nogrpid, "nogrpid"}, |
| 905 | {Opt_nogrpid, "sysvgroups"}, |
| 906 | {Opt_resgid, "resgid=%u"}, |
| 907 | {Opt_resuid, "resuid=%u"}, |
| 908 | {Opt_sb, "sb=%u"}, |
| 909 | {Opt_err_cont, "errors=continue"}, |
| 910 | {Opt_err_panic, "errors=panic"}, |
| 911 | {Opt_err_ro, "errors=remount-ro"}, |
| 912 | {Opt_nouid32, "nouid32"}, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 913 | {Opt_debug, "debug"}, |
| 914 | {Opt_oldalloc, "oldalloc"}, |
| 915 | {Opt_orlov, "orlov"}, |
| 916 | {Opt_user_xattr, "user_xattr"}, |
| 917 | {Opt_nouser_xattr, "nouser_xattr"}, |
| 918 | {Opt_acl, "acl"}, |
| 919 | {Opt_noacl, "noacl"}, |
| 920 | {Opt_reservation, "reservation"}, |
| 921 | {Opt_noreservation, "noreservation"}, |
| 922 | {Opt_noload, "noload"}, |
| 923 | {Opt_nobh, "nobh"}, |
| 924 | {Opt_bh, "bh"}, |
| 925 | {Opt_commit, "commit=%u"}, |
Theodore Ts'o | 3077384 | 2009-01-03 20:27:38 -0500 | [diff] [blame] | 926 | {Opt_min_batch_time, "min_batch_time=%u"}, |
| 927 | {Opt_max_batch_time, "max_batch_time=%u"}, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 928 | {Opt_journal_update, "journal=update"}, |
| 929 | {Opt_journal_inum, "journal=%u"}, |
| 930 | {Opt_journal_dev, "journal_dev=%u"}, |
Girish Shilamkar | 818d276 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 931 | {Opt_journal_checksum, "journal_checksum"}, |
| 932 | {Opt_journal_async_commit, "journal_async_commit"}, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 933 | {Opt_abort, "abort"}, |
| 934 | {Opt_data_journal, "data=journal"}, |
| 935 | {Opt_data_ordered, "data=ordered"}, |
| 936 | {Opt_data_writeback, "data=writeback"}, |
Hidehiro Kawai | 5bf5683 | 2008-10-10 22:12:43 -0400 | [diff] [blame] | 937 | {Opt_data_err_abort, "data_err=abort"}, |
| 938 | {Opt_data_err_ignore, "data_err=ignore"}, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 939 | {Opt_offusrjquota, "usrjquota="}, |
| 940 | {Opt_usrjquota, "usrjquota=%s"}, |
| 941 | {Opt_offgrpjquota, "grpjquota="}, |
| 942 | {Opt_grpjquota, "grpjquota=%s"}, |
| 943 | {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, |
| 944 | {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, |
| 945 | {Opt_grpquota, "grpquota"}, |
| 946 | {Opt_noquota, "noquota"}, |
| 947 | {Opt_quota, "quota"}, |
| 948 | {Opt_usrquota, "usrquota"}, |
| 949 | {Opt_barrier, "barrier=%u"}, |
Alex Tomas | a86c618 | 2006-10-11 01:21:03 -0700 | [diff] [blame] | 950 | {Opt_extents, "extents"}, |
Mingming Cao | 1e2462f | 2007-07-18 09:00:55 -0400 | [diff] [blame] | 951 | {Opt_noextents, "noextents"}, |
Jean Noel Cordenner | 25ec56b | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 952 | {Opt_i_version, "i_version"}, |
Alex Tomas | c9de560 | 2008-01-29 00:19:52 -0500 | [diff] [blame] | 953 | {Opt_stripe, "stripe=%u"}, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 954 | {Opt_resize, "resize"}, |
Alex Tomas | 6476924 | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 955 | {Opt_delalloc, "delalloc"}, |
Aneesh Kumar K.V | dd919b9 | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 956 | {Opt_nodelalloc, "nodelalloc"}, |
Theodore Ts'o | 240799c | 2008-10-09 23:53:47 -0400 | [diff] [blame] | 957 | {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, |
Josef Bacik | f3f12fa | 2008-04-29 22:05:28 -0400 | [diff] [blame] | 958 | {Opt_err, NULL}, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 959 | }; |
| 960 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 961 | static ext4_fsblk_t get_sb_block(void **data) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 962 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 963 | ext4_fsblk_t sb_block; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 964 | char *options = (char *) *data; |
| 965 | |
| 966 | if (!options || strncmp(options, "sb=", 3) != 0) |
| 967 | return 1; /* Default location */ |
| 968 | options += 3; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 969 | /*todo: use simple_strtoll with >32bit ext4 */ |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 970 | sb_block = simple_strtoul(options, &options, 0); |
| 971 | if (*options && *options != ',') { |
Theodore Ts'o | 4776004f | 2008-09-08 23:00:52 -0400 | [diff] [blame] | 972 | printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 973 | (char *) *data); |
| 974 | return 1; |
| 975 | } |
| 976 | if (*options == ',') |
| 977 | options++; |
| 978 | *data = (void *) options; |
| 979 | return sb_block; |
| 980 | } |
| 981 | |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 982 | static int parse_options(char *options, struct super_block *sb, |
| 983 | unsigned int *inum, unsigned long *journal_devnum, |
| 984 | ext4_fsblk_t *n_blocks_count, int is_remount) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 985 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 986 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 987 | char *p; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 988 | substring_t args[MAX_OPT_ARGS]; |
| 989 | int data_opt = 0; |
| 990 | int option; |
| 991 | #ifdef CONFIG_QUOTA |
Jan Kara | dfc5d03 | 2008-05-13 19:11:51 -0400 | [diff] [blame] | 992 | int qtype, qfmt; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 993 | char *qname; |
| 994 | #endif |
Aneesh Kumar K.V | c07651b | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 995 | ext4_fsblk_t last_block; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 996 | |
| 997 | if (!options) |
| 998 | return 1; |
| 999 | |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 1000 | while ((p = strsep(&options, ",")) != NULL) { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1001 | int token; |
| 1002 | if (!*p) |
| 1003 | continue; |
| 1004 | |
| 1005 | token = match_token(p, tokens, args); |
| 1006 | switch (token) { |
| 1007 | case Opt_bsd_df: |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 1008 | clear_opt(sbi->s_mount_opt, MINIX_DF); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1009 | break; |
| 1010 | case Opt_minix_df: |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 1011 | set_opt(sbi->s_mount_opt, MINIX_DF); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1012 | break; |
| 1013 | case Opt_grpid: |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 1014 | set_opt(sbi->s_mount_opt, GRPID); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1015 | break; |
| 1016 | case Opt_nogrpid: |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 1017 | clear_opt(sbi->s_mount_opt, GRPID); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1018 | break; |
| 1019 | case Opt_resuid: |
| 1020 | if (match_int(&args[0], &option)) |
| 1021 | return 0; |
| 1022 | sbi->s_resuid = option; |
| 1023 | break; |
| 1024 | case Opt_resgid: |
| 1025 | if (match_int(&args[0], &option)) |
| 1026 | return 0; |
| 1027 | sbi->s_resgid = option; |
| 1028 | break; |
| 1029 | case Opt_sb: |
| 1030 | /* handled by get_sb_block() instead of here */ |
| 1031 | /* *sb_block = match_int(&args[0]); */ |
| 1032 | break; |
| 1033 | case Opt_err_panic: |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 1034 | clear_opt(sbi->s_mount_opt, ERRORS_CONT); |
| 1035 | clear_opt(sbi->s_mount_opt, ERRORS_RO); |
| 1036 | set_opt(sbi->s_mount_opt, ERRORS_PANIC); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1037 | break; |
| 1038 | case Opt_err_ro: |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 1039 | clear_opt(sbi->s_mount_opt, ERRORS_CONT); |
| 1040 | clear_opt(sbi->s_mount_opt, ERRORS_PANIC); |
| 1041 | set_opt(sbi->s_mount_opt, ERRORS_RO); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1042 | break; |
| 1043 | case Opt_err_cont: |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 1044 | clear_opt(sbi->s_mount_opt, ERRORS_RO); |
| 1045 | clear_opt(sbi->s_mount_opt, ERRORS_PANIC); |
| 1046 | set_opt(sbi->s_mount_opt, ERRORS_CONT); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1047 | break; |
| 1048 | case Opt_nouid32: |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 1049 | set_opt(sbi->s_mount_opt, NO_UID32); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1050 | break; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1051 | case Opt_debug: |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 1052 | set_opt(sbi->s_mount_opt, DEBUG); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1053 | break; |
| 1054 | case Opt_oldalloc: |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 1055 | set_opt(sbi->s_mount_opt, OLDALLOC); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1056 | break; |
| 1057 | case Opt_orlov: |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 1058 | clear_opt(sbi->s_mount_opt, OLDALLOC); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1059 | break; |
Theodore Ts'o | 03010a3 | 2008-10-10 20:02:48 -0400 | [diff] [blame] | 1060 | #ifdef CONFIG_EXT4_FS_XATTR |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1061 | case Opt_user_xattr: |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 1062 | set_opt(sbi->s_mount_opt, XATTR_USER); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1063 | break; |
| 1064 | case Opt_nouser_xattr: |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 1065 | clear_opt(sbi->s_mount_opt, XATTR_USER); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1066 | break; |
| 1067 | #else |
| 1068 | case Opt_user_xattr: |
| 1069 | case Opt_nouser_xattr: |
Theodore Ts'o | 4776004f | 2008-09-08 23:00:52 -0400 | [diff] [blame] | 1070 | printk(KERN_ERR "EXT4 (no)user_xattr options " |
| 1071 | "not supported\n"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1072 | break; |
| 1073 | #endif |
Theodore Ts'o | 03010a3 | 2008-10-10 20:02:48 -0400 | [diff] [blame] | 1074 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1075 | case Opt_acl: |
| 1076 | set_opt(sbi->s_mount_opt, POSIX_ACL); |
| 1077 | break; |
| 1078 | case Opt_noacl: |
| 1079 | clear_opt(sbi->s_mount_opt, POSIX_ACL); |
| 1080 | break; |
| 1081 | #else |
| 1082 | case Opt_acl: |
| 1083 | case Opt_noacl: |
Theodore Ts'o | 4776004f | 2008-09-08 23:00:52 -0400 | [diff] [blame] | 1084 | printk(KERN_ERR "EXT4 (no)acl options " |
| 1085 | "not supported\n"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1086 | break; |
| 1087 | #endif |
| 1088 | case Opt_reservation: |
| 1089 | set_opt(sbi->s_mount_opt, RESERVATION); |
| 1090 | break; |
| 1091 | case Opt_noreservation: |
| 1092 | clear_opt(sbi->s_mount_opt, RESERVATION); |
| 1093 | break; |
| 1094 | case Opt_journal_update: |
| 1095 | /* @@@ FIXME */ |
| 1096 | /* Eventually we will want to be able to create |
| 1097 | a journal file here. For now, only allow the |
| 1098 | user to specify an existing inode to be the |
| 1099 | journal file. */ |
| 1100 | if (is_remount) { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1101 | printk(KERN_ERR "EXT4-fs: cannot specify " |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1102 | "journal on remount\n"); |
| 1103 | return 0; |
| 1104 | } |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 1105 | set_opt(sbi->s_mount_opt, UPDATE_JOURNAL); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1106 | break; |
| 1107 | case Opt_journal_inum: |
| 1108 | if (is_remount) { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1109 | printk(KERN_ERR "EXT4-fs: cannot specify " |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1110 | "journal on remount\n"); |
| 1111 | return 0; |
| 1112 | } |
| 1113 | if (match_int(&args[0], &option)) |
| 1114 | return 0; |
| 1115 | *inum = option; |
| 1116 | break; |
| 1117 | case Opt_journal_dev: |
| 1118 | if (is_remount) { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1119 | printk(KERN_ERR "EXT4-fs: cannot specify " |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1120 | "journal on remount\n"); |
| 1121 | return 0; |
| 1122 | } |
| 1123 | if (match_int(&args[0], &option)) |
| 1124 | return 0; |
| 1125 | *journal_devnum = option; |
| 1126 | break; |
Girish Shilamkar | 818d276 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 1127 | case Opt_journal_checksum: |
| 1128 | set_opt(sbi->s_mount_opt, JOURNAL_CHECKSUM); |
| 1129 | break; |
| 1130 | case Opt_journal_async_commit: |
| 1131 | set_opt(sbi->s_mount_opt, JOURNAL_ASYNC_COMMIT); |
| 1132 | set_opt(sbi->s_mount_opt, JOURNAL_CHECKSUM); |
| 1133 | break; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1134 | case Opt_noload: |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 1135 | set_opt(sbi->s_mount_opt, NOLOAD); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1136 | break; |
| 1137 | case Opt_commit: |
| 1138 | if (match_int(&args[0], &option)) |
| 1139 | return 0; |
| 1140 | if (option < 0) |
| 1141 | return 0; |
| 1142 | if (option == 0) |
Mingming Cao | cd02ff0 | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 1143 | option = JBD2_DEFAULT_MAX_COMMIT_AGE; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1144 | sbi->s_commit_interval = HZ * option; |
| 1145 | break; |
Theodore Ts'o | 3077384 | 2009-01-03 20:27:38 -0500 | [diff] [blame] | 1146 | case Opt_max_batch_time: |
| 1147 | if (match_int(&args[0], &option)) |
| 1148 | return 0; |
| 1149 | if (option < 0) |
| 1150 | return 0; |
| 1151 | if (option == 0) |
| 1152 | option = EXT4_DEF_MAX_BATCH_TIME; |
| 1153 | sbi->s_max_batch_time = option; |
| 1154 | break; |
| 1155 | case Opt_min_batch_time: |
| 1156 | if (match_int(&args[0], &option)) |
| 1157 | return 0; |
| 1158 | if (option < 0) |
| 1159 | return 0; |
| 1160 | sbi->s_min_batch_time = option; |
| 1161 | break; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1162 | case Opt_data_journal: |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1163 | data_opt = EXT4_MOUNT_JOURNAL_DATA; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1164 | goto datacheck; |
| 1165 | case Opt_data_ordered: |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1166 | data_opt = EXT4_MOUNT_ORDERED_DATA; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1167 | goto datacheck; |
| 1168 | case Opt_data_writeback: |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1169 | data_opt = EXT4_MOUNT_WRITEBACK_DATA; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1170 | datacheck: |
| 1171 | if (is_remount) { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1172 | if ((sbi->s_mount_opt & EXT4_MOUNT_DATA_FLAGS) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1173 | != data_opt) { |
| 1174 | printk(KERN_ERR |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1175 | "EXT4-fs: cannot change data " |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1176 | "mode on remount\n"); |
| 1177 | return 0; |
| 1178 | } |
| 1179 | } else { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1180 | sbi->s_mount_opt &= ~EXT4_MOUNT_DATA_FLAGS; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1181 | sbi->s_mount_opt |= data_opt; |
| 1182 | } |
| 1183 | break; |
Hidehiro Kawai | 5bf5683 | 2008-10-10 22:12:43 -0400 | [diff] [blame] | 1184 | case Opt_data_err_abort: |
| 1185 | set_opt(sbi->s_mount_opt, DATA_ERR_ABORT); |
| 1186 | break; |
| 1187 | case Opt_data_err_ignore: |
| 1188 | clear_opt(sbi->s_mount_opt, DATA_ERR_ABORT); |
| 1189 | break; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1190 | #ifdef CONFIG_QUOTA |
| 1191 | case Opt_usrjquota: |
| 1192 | qtype = USRQUOTA; |
| 1193 | goto set_qf_name; |
| 1194 | case Opt_grpjquota: |
| 1195 | qtype = GRPQUOTA; |
| 1196 | set_qf_name: |
Jan Kara | dfc5d03 | 2008-05-13 19:11:51 -0400 | [diff] [blame] | 1197 | if ((sb_any_quota_enabled(sb) || |
| 1198 | sb_any_quota_suspended(sb)) && |
| 1199 | !sbi->s_qf_names[qtype]) { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1200 | printk(KERN_ERR |
Theodore Ts'o | 4776004f | 2008-09-08 23:00:52 -0400 | [diff] [blame] | 1201 | "EXT4-fs: Cannot change journaled " |
| 1202 | "quota options when quota turned on.\n"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1203 | return 0; |
| 1204 | } |
| 1205 | qname = match_strdup(&args[0]); |
| 1206 | if (!qname) { |
| 1207 | printk(KERN_ERR |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1208 | "EXT4-fs: not enough memory for " |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1209 | "storing quotafile name.\n"); |
| 1210 | return 0; |
| 1211 | } |
| 1212 | if (sbi->s_qf_names[qtype] && |
| 1213 | strcmp(sbi->s_qf_names[qtype], qname)) { |
| 1214 | printk(KERN_ERR |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1215 | "EXT4-fs: %s quota file already " |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1216 | "specified.\n", QTYPE2NAME(qtype)); |
| 1217 | kfree(qname); |
| 1218 | return 0; |
| 1219 | } |
| 1220 | sbi->s_qf_names[qtype] = qname; |
| 1221 | if (strchr(sbi->s_qf_names[qtype], '/')) { |
| 1222 | printk(KERN_ERR |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1223 | "EXT4-fs: quotafile must be on " |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1224 | "filesystem root.\n"); |
| 1225 | kfree(sbi->s_qf_names[qtype]); |
| 1226 | sbi->s_qf_names[qtype] = NULL; |
| 1227 | return 0; |
| 1228 | } |
| 1229 | set_opt(sbi->s_mount_opt, QUOTA); |
| 1230 | break; |
| 1231 | case Opt_offusrjquota: |
| 1232 | qtype = USRQUOTA; |
| 1233 | goto clear_qf_name; |
| 1234 | case Opt_offgrpjquota: |
| 1235 | qtype = GRPQUOTA; |
| 1236 | clear_qf_name: |
Jan Kara | dfc5d03 | 2008-05-13 19:11:51 -0400 | [diff] [blame] | 1237 | if ((sb_any_quota_enabled(sb) || |
| 1238 | sb_any_quota_suspended(sb)) && |
| 1239 | sbi->s_qf_names[qtype]) { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1240 | printk(KERN_ERR "EXT4-fs: Cannot change " |
Jan Kara | 2c8be6b | 2008-05-13 21:27:55 -0400 | [diff] [blame] | 1241 | "journaled quota options when " |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1242 | "quota turned on.\n"); |
| 1243 | return 0; |
| 1244 | } |
| 1245 | /* |
| 1246 | * The space will be released later when all options |
| 1247 | * are confirmed to be correct |
| 1248 | */ |
| 1249 | sbi->s_qf_names[qtype] = NULL; |
| 1250 | break; |
| 1251 | case Opt_jqfmt_vfsold: |
Jan Kara | dfc5d03 | 2008-05-13 19:11:51 -0400 | [diff] [blame] | 1252 | qfmt = QFMT_VFS_OLD; |
| 1253 | goto set_qf_format; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1254 | case Opt_jqfmt_vfsv0: |
Jan Kara | dfc5d03 | 2008-05-13 19:11:51 -0400 | [diff] [blame] | 1255 | qfmt = QFMT_VFS_V0; |
| 1256 | set_qf_format: |
| 1257 | if ((sb_any_quota_enabled(sb) || |
| 1258 | sb_any_quota_suspended(sb)) && |
| 1259 | sbi->s_jquota_fmt != qfmt) { |
| 1260 | printk(KERN_ERR "EXT4-fs: Cannot change " |
| 1261 | "journaled quota options when " |
| 1262 | "quota turned on.\n"); |
| 1263 | return 0; |
| 1264 | } |
| 1265 | sbi->s_jquota_fmt = qfmt; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1266 | break; |
| 1267 | case Opt_quota: |
| 1268 | case Opt_usrquota: |
| 1269 | set_opt(sbi->s_mount_opt, QUOTA); |
| 1270 | set_opt(sbi->s_mount_opt, USRQUOTA); |
| 1271 | break; |
| 1272 | case Opt_grpquota: |
| 1273 | set_opt(sbi->s_mount_opt, QUOTA); |
| 1274 | set_opt(sbi->s_mount_opt, GRPQUOTA); |
| 1275 | break; |
| 1276 | case Opt_noquota: |
| 1277 | if (sb_any_quota_enabled(sb)) { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1278 | printk(KERN_ERR "EXT4-fs: Cannot change quota " |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1279 | "options when quota turned on.\n"); |
| 1280 | return 0; |
| 1281 | } |
| 1282 | clear_opt(sbi->s_mount_opt, QUOTA); |
| 1283 | clear_opt(sbi->s_mount_opt, USRQUOTA); |
| 1284 | clear_opt(sbi->s_mount_opt, GRPQUOTA); |
| 1285 | break; |
| 1286 | #else |
| 1287 | case Opt_quota: |
| 1288 | case Opt_usrquota: |
| 1289 | case Opt_grpquota: |
Jan Kara | cd59e7b | 2008-05-13 19:11:51 -0400 | [diff] [blame] | 1290 | printk(KERN_ERR |
| 1291 | "EXT4-fs: quota options not supported.\n"); |
| 1292 | break; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1293 | case Opt_usrjquota: |
| 1294 | case Opt_grpjquota: |
| 1295 | case Opt_offusrjquota: |
| 1296 | case Opt_offgrpjquota: |
| 1297 | case Opt_jqfmt_vfsold: |
| 1298 | case Opt_jqfmt_vfsv0: |
| 1299 | printk(KERN_ERR |
Jan Kara | cd59e7b | 2008-05-13 19:11:51 -0400 | [diff] [blame] | 1300 | "EXT4-fs: journaled quota options not " |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1301 | "supported.\n"); |
| 1302 | break; |
| 1303 | case Opt_noquota: |
| 1304 | break; |
| 1305 | #endif |
| 1306 | case Opt_abort: |
| 1307 | set_opt(sbi->s_mount_opt, ABORT); |
| 1308 | break; |
| 1309 | case Opt_barrier: |
| 1310 | if (match_int(&args[0], &option)) |
| 1311 | return 0; |
| 1312 | if (option) |
| 1313 | set_opt(sbi->s_mount_opt, BARRIER); |
| 1314 | else |
| 1315 | clear_opt(sbi->s_mount_opt, BARRIER); |
| 1316 | break; |
| 1317 | case Opt_ignore: |
| 1318 | break; |
| 1319 | case Opt_resize: |
| 1320 | if (!is_remount) { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1321 | printk("EXT4-fs: resize option only available " |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1322 | "for remount\n"); |
| 1323 | return 0; |
| 1324 | } |
| 1325 | if (match_int(&args[0], &option) != 0) |
| 1326 | return 0; |
| 1327 | *n_blocks_count = option; |
| 1328 | break; |
| 1329 | case Opt_nobh: |
| 1330 | set_opt(sbi->s_mount_opt, NOBH); |
| 1331 | break; |
| 1332 | case Opt_bh: |
| 1333 | clear_opt(sbi->s_mount_opt, NOBH); |
| 1334 | break; |
Alex Tomas | a86c618 | 2006-10-11 01:21:03 -0700 | [diff] [blame] | 1335 | case Opt_extents: |
Eric Sandeen | e4079a1 | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 1336 | if (!EXT4_HAS_INCOMPAT_FEATURE(sb, |
| 1337 | EXT4_FEATURE_INCOMPAT_EXTENTS)) { |
| 1338 | ext4_warning(sb, __func__, |
| 1339 | "extents feature not enabled " |
Theodore Ts'o | fde4d95 | 2009-01-05 22:17:35 -0500 | [diff] [blame] | 1340 | "on this filesystem, use tune2fs"); |
Eric Sandeen | e4079a1 | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 1341 | return 0; |
| 1342 | } |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 1343 | set_opt(sbi->s_mount_opt, EXTENTS); |
Alex Tomas | a86c618 | 2006-10-11 01:21:03 -0700 | [diff] [blame] | 1344 | break; |
Mingming Cao | 1e2462f | 2007-07-18 09:00:55 -0400 | [diff] [blame] | 1345 | case Opt_noextents: |
Aneesh Kumar K.V | c07651b | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 1346 | /* |
| 1347 | * When e2fsprogs support resizing an already existing |
| 1348 | * ext3 file system to greater than 2**32 we need to |
| 1349 | * add support to block allocator to handle growing |
| 1350 | * already existing block mapped inode so that blocks |
| 1351 | * allocated for them fall within 2**32 |
| 1352 | */ |
| 1353 | last_block = ext4_blocks_count(sbi->s_es) - 1; |
| 1354 | if (last_block > 0xffffffffULL) { |
| 1355 | printk(KERN_ERR "EXT4-fs: Filesystem too " |
| 1356 | "large to mount with " |
| 1357 | "-o noextents options\n"); |
| 1358 | return 0; |
| 1359 | } |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 1360 | clear_opt(sbi->s_mount_opt, EXTENTS); |
Mingming Cao | 1e2462f | 2007-07-18 09:00:55 -0400 | [diff] [blame] | 1361 | break; |
Jean Noel Cordenner | 25ec56b | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 1362 | case Opt_i_version: |
| 1363 | set_opt(sbi->s_mount_opt, I_VERSION); |
| 1364 | sb->s_flags |= MS_I_VERSION; |
| 1365 | break; |
Aneesh Kumar K.V | dd919b9 | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 1366 | case Opt_nodelalloc: |
| 1367 | clear_opt(sbi->s_mount_opt, DELALLOC); |
| 1368 | break; |
Alex Tomas | c9de560 | 2008-01-29 00:19:52 -0500 | [diff] [blame] | 1369 | case Opt_stripe: |
| 1370 | if (match_int(&args[0], &option)) |
| 1371 | return 0; |
| 1372 | if (option < 0) |
| 1373 | return 0; |
| 1374 | sbi->s_stripe = option; |
| 1375 | break; |
Alex Tomas | 6476924 | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 1376 | case Opt_delalloc: |
| 1377 | set_opt(sbi->s_mount_opt, DELALLOC); |
| 1378 | break; |
Theodore Ts'o | 240799c | 2008-10-09 23:53:47 -0400 | [diff] [blame] | 1379 | case Opt_inode_readahead_blks: |
| 1380 | if (match_int(&args[0], &option)) |
| 1381 | return 0; |
| 1382 | if (option < 0 || option > (1 << 30)) |
| 1383 | return 0; |
| 1384 | sbi->s_inode_readahead_blks = option; |
| 1385 | break; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1386 | default: |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 1387 | printk(KERN_ERR |
| 1388 | "EXT4-fs: Unrecognized mount option \"%s\" " |
| 1389 | "or missing value\n", p); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1390 | return 0; |
| 1391 | } |
| 1392 | } |
| 1393 | #ifdef CONFIG_QUOTA |
| 1394 | if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1395 | if ((sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA) && |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1396 | sbi->s_qf_names[USRQUOTA]) |
| 1397 | clear_opt(sbi->s_mount_opt, USRQUOTA); |
| 1398 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1399 | if ((sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA) && |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1400 | sbi->s_qf_names[GRPQUOTA]) |
| 1401 | clear_opt(sbi->s_mount_opt, GRPQUOTA); |
| 1402 | |
| 1403 | if ((sbi->s_qf_names[USRQUOTA] && |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1404 | (sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA)) || |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1405 | (sbi->s_qf_names[GRPQUOTA] && |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1406 | (sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA))) { |
| 1407 | printk(KERN_ERR "EXT4-fs: old and new quota " |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1408 | "format mixing.\n"); |
| 1409 | return 0; |
| 1410 | } |
| 1411 | |
| 1412 | if (!sbi->s_jquota_fmt) { |
Jan Kara | 2c8be6b | 2008-05-13 21:27:55 -0400 | [diff] [blame] | 1413 | printk(KERN_ERR "EXT4-fs: journaled quota format " |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1414 | "not specified.\n"); |
| 1415 | return 0; |
| 1416 | } |
| 1417 | } else { |
| 1418 | if (sbi->s_jquota_fmt) { |
Jan Kara | 2c8be6b | 2008-05-13 21:27:55 -0400 | [diff] [blame] | 1419 | printk(KERN_ERR "EXT4-fs: journaled quota format " |
| 1420 | "specified with no journaling " |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1421 | "enabled.\n"); |
| 1422 | return 0; |
| 1423 | } |
| 1424 | } |
| 1425 | #endif |
| 1426 | return 1; |
| 1427 | } |
| 1428 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1429 | 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] | 1430 | int read_only) |
| 1431 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1432 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1433 | int res = 0; |
| 1434 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1435 | if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 1436 | printk(KERN_ERR "EXT4-fs warning: revision level too high, " |
| 1437 | "forcing read-only mode\n"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1438 | res = MS_RDONLY; |
| 1439 | } |
| 1440 | if (read_only) |
| 1441 | return res; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1442 | if (!(sbi->s_mount_state & EXT4_VALID_FS)) |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 1443 | printk(KERN_WARNING "EXT4-fs warning: mounting unchecked fs, " |
| 1444 | "running e2fsck is recommended\n"); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1445 | else if ((sbi->s_mount_state & EXT4_ERROR_FS)) |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 1446 | printk(KERN_WARNING |
| 1447 | "EXT4-fs warning: mounting fs with errors, " |
| 1448 | "running e2fsck is recommended\n"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1449 | else if ((__s16) le16_to_cpu(es->s_max_mnt_count) >= 0 && |
| 1450 | le16_to_cpu(es->s_mnt_count) >= |
| 1451 | (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 1452 | printk(KERN_WARNING |
| 1453 | "EXT4-fs warning: maximal mount count reached, " |
| 1454 | "running e2fsck is recommended\n"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1455 | else if (le32_to_cpu(es->s_checkinterval) && |
| 1456 | (le32_to_cpu(es->s_lastcheck) + |
| 1457 | le32_to_cpu(es->s_checkinterval) <= get_seconds())) |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 1458 | printk(KERN_WARNING |
| 1459 | "EXT4-fs warning: checktime reached, " |
| 1460 | "running e2fsck is recommended\n"); |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 1461 | if (!sbi->s_journal) |
| 1462 | es->s_state &= cpu_to_le16(~EXT4_VALID_FS); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1463 | if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1464 | 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] | 1465 | le16_add_cpu(&es->s_mnt_count, 1); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1466 | es->s_mtime = cpu_to_le32(get_seconds()); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1467 | ext4_update_dynamic_rev(sb); |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 1468 | if (sbi->s_journal) |
| 1469 | EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1470 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1471 | ext4_commit_super(sb, es, 1); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1472 | if (test_opt(sb, DEBUG)) |
Theodore Ts'o | a9df9a4 | 2009-01-05 22:18:16 -0500 | [diff] [blame^] | 1473 | printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1474 | "bpg=%lu, ipg=%lu, mo=%04lx]\n", |
| 1475 | sb->s_blocksize, |
| 1476 | sbi->s_groups_count, |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1477 | EXT4_BLOCKS_PER_GROUP(sb), |
| 1478 | EXT4_INODES_PER_GROUP(sb), |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1479 | sbi->s_mount_opt); |
| 1480 | |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 1481 | if (EXT4_SB(sb)->s_journal) { |
| 1482 | printk(KERN_INFO "EXT4 FS on %s, %s journal on %s\n", |
| 1483 | sb->s_id, EXT4_SB(sb)->s_journal->j_inode ? "internal" : |
| 1484 | "external", EXT4_SB(sb)->s_journal->j_devname); |
| 1485 | } else { |
| 1486 | printk(KERN_INFO "EXT4 FS on %s, no journal\n", sb->s_id); |
| 1487 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1488 | return res; |
| 1489 | } |
| 1490 | |
Jose R. Santos | 772cb7c | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 1491 | static int ext4_fill_flex_info(struct super_block *sb) |
| 1492 | { |
| 1493 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
| 1494 | struct ext4_group_desc *gdp = NULL; |
| 1495 | struct buffer_head *bh; |
| 1496 | ext4_group_t flex_group_count; |
| 1497 | ext4_group_t flex_group; |
| 1498 | int groups_per_flex = 0; |
Jose R. Santos | 772cb7c | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 1499 | int i; |
| 1500 | |
| 1501 | if (!sbi->s_es->s_log_groups_per_flex) { |
| 1502 | sbi->s_log_groups_per_flex = 0; |
| 1503 | return 1; |
| 1504 | } |
| 1505 | |
| 1506 | sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; |
| 1507 | groups_per_flex = 1 << sbi->s_log_groups_per_flex; |
| 1508 | |
Frederic Bohe | c62a11f | 2008-09-08 10:20:24 -0400 | [diff] [blame] | 1509 | /* We allocate both existing and potentially added groups */ |
| 1510 | 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] | 1511 | ((le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) + 1) << |
| 1512 | EXT4_DESC_PER_BLOCK_BITS(sb))) / groups_per_flex; |
Li Zefan | ec05e86 | 2008-07-24 12:49:59 -0400 | [diff] [blame] | 1513 | sbi->s_flex_groups = kzalloc(flex_group_count * |
Jose R. Santos | 772cb7c | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 1514 | sizeof(struct flex_groups), GFP_KERNEL); |
| 1515 | if (sbi->s_flex_groups == NULL) { |
Li Zefan | ec05e86 | 2008-07-24 12:49:59 -0400 | [diff] [blame] | 1516 | printk(KERN_ERR "EXT4-fs: not enough memory for " |
Theodore Ts'o | a9df9a4 | 2009-01-05 22:18:16 -0500 | [diff] [blame^] | 1517 | "%u flex groups\n", flex_group_count); |
Jose R. Santos | 772cb7c | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 1518 | goto failed; |
| 1519 | } |
Jose R. Santos | 772cb7c | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 1520 | |
Jose R. Santos | 772cb7c | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 1521 | for (i = 0; i < sbi->s_groups_count; i++) { |
| 1522 | gdp = ext4_get_group_desc(sb, i, &bh); |
| 1523 | |
| 1524 | flex_group = ext4_flex_group(sbi, i); |
| 1525 | sbi->s_flex_groups[flex_group].free_inodes += |
| 1526 | le16_to_cpu(gdp->bg_free_inodes_count); |
| 1527 | sbi->s_flex_groups[flex_group].free_blocks += |
| 1528 | le16_to_cpu(gdp->bg_free_blocks_count); |
| 1529 | } |
| 1530 | |
| 1531 | return 1; |
| 1532 | failed: |
| 1533 | return 0; |
| 1534 | } |
| 1535 | |
Andreas Dilger | 717d50e | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 1536 | __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group, |
| 1537 | struct ext4_group_desc *gdp) |
| 1538 | { |
| 1539 | __u16 crc = 0; |
| 1540 | |
| 1541 | if (sbi->s_es->s_feature_ro_compat & |
| 1542 | cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) { |
| 1543 | int offset = offsetof(struct ext4_group_desc, bg_checksum); |
| 1544 | __le32 le_group = cpu_to_le32(block_group); |
| 1545 | |
| 1546 | crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); |
| 1547 | crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); |
| 1548 | crc = crc16(crc, (__u8 *)gdp, offset); |
| 1549 | offset += sizeof(gdp->bg_checksum); /* skip checksum */ |
| 1550 | /* for checksum of struct ext4_group_desc do the rest...*/ |
| 1551 | if ((sbi->s_es->s_feature_incompat & |
| 1552 | cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT)) && |
| 1553 | offset < le16_to_cpu(sbi->s_es->s_desc_size)) |
| 1554 | crc = crc16(crc, (__u8 *)gdp + offset, |
| 1555 | le16_to_cpu(sbi->s_es->s_desc_size) - |
| 1556 | offset); |
| 1557 | } |
| 1558 | |
| 1559 | return cpu_to_le16(crc); |
| 1560 | } |
| 1561 | |
| 1562 | int ext4_group_desc_csum_verify(struct ext4_sb_info *sbi, __u32 block_group, |
| 1563 | struct ext4_group_desc *gdp) |
| 1564 | { |
| 1565 | if ((sbi->s_es->s_feature_ro_compat & |
| 1566 | cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) && |
| 1567 | (gdp->bg_checksum != ext4_group_desc_csum(sbi, block_group, gdp))) |
| 1568 | return 0; |
| 1569 | |
| 1570 | return 1; |
| 1571 | } |
| 1572 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1573 | /* Called at mount-time, super-block is locked */ |
Akinobu Mita | 197cd65a | 2008-02-06 01:40:16 -0800 | [diff] [blame] | 1574 | static int ext4_check_descriptors(struct super_block *sb) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1575 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1576 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
| 1577 | ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); |
| 1578 | ext4_fsblk_t last_block; |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 1579 | ext4_fsblk_t block_bitmap; |
| 1580 | ext4_fsblk_t inode_bitmap; |
| 1581 | ext4_fsblk_t inode_table; |
Jose R. Santos | ce42158 | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 1582 | int flexbg_flag = 0; |
Avantika Mathur | fd2d429 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 1583 | ext4_group_t i; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1584 | |
Jose R. Santos | ce42158 | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 1585 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) |
| 1586 | flexbg_flag = 1; |
| 1587 | |
Theodore Ts'o | af5bc92 | 2008-09-08 22:25:24 -0400 | [diff] [blame] | 1588 | ext4_debug("Checking group descriptors"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1589 | |
Akinobu Mita | 197cd65a | 2008-02-06 01:40:16 -0800 | [diff] [blame] | 1590 | for (i = 0; i < sbi->s_groups_count; i++) { |
| 1591 | struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); |
| 1592 | |
Jose R. Santos | ce42158 | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 1593 | if (i == sbi->s_groups_count - 1 || flexbg_flag) |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 1594 | last_block = ext4_blocks_count(sbi->s_es) - 1; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1595 | else |
| 1596 | last_block = first_block + |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1597 | (EXT4_BLOCKS_PER_GROUP(sb) - 1); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1598 | |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 1599 | block_bitmap = ext4_block_bitmap(sb, gdp); |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 1600 | if (block_bitmap < first_block || block_bitmap > last_block) { |
Josef Bacik | c19204b | 2008-04-29 22:00:28 -0400 | [diff] [blame] | 1601 | printk(KERN_ERR "EXT4-fs: ext4_check_descriptors: " |
Theodore Ts'o | a9df9a4 | 2009-01-05 22:18:16 -0500 | [diff] [blame^] | 1602 | "Block bitmap for group %u not in group " |
Eric Sesterhenn | 5128273 | 2008-10-17 09:16:19 -0400 | [diff] [blame] | 1603 | "(block %llu)!\n", i, block_bitmap); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1604 | return 0; |
| 1605 | } |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 1606 | inode_bitmap = ext4_inode_bitmap(sb, gdp); |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 1607 | if (inode_bitmap < first_block || inode_bitmap > last_block) { |
Josef Bacik | c19204b | 2008-04-29 22:00:28 -0400 | [diff] [blame] | 1608 | printk(KERN_ERR "EXT4-fs: ext4_check_descriptors: " |
Theodore Ts'o | a9df9a4 | 2009-01-05 22:18:16 -0500 | [diff] [blame^] | 1609 | "Inode bitmap for group %u not in group " |
Eric Sesterhenn | 5128273 | 2008-10-17 09:16:19 -0400 | [diff] [blame] | 1610 | "(block %llu)!\n", i, inode_bitmap); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1611 | return 0; |
| 1612 | } |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 1613 | inode_table = ext4_inode_table(sb, gdp); |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 1614 | if (inode_table < first_block || |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 1615 | inode_table + sbi->s_itb_per_group - 1 > last_block) { |
Josef Bacik | c19204b | 2008-04-29 22:00:28 -0400 | [diff] [blame] | 1616 | printk(KERN_ERR "EXT4-fs: ext4_check_descriptors: " |
Theodore Ts'o | a9df9a4 | 2009-01-05 22:18:16 -0500 | [diff] [blame^] | 1617 | "Inode table for group %u not in group " |
Eric Sesterhenn | 5128273 | 2008-10-17 09:16:19 -0400 | [diff] [blame] | 1618 | "(block %llu)!\n", i, inode_table); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1619 | return 0; |
| 1620 | } |
Eric Sandeen | b5f10ee | 2008-08-02 21:21:08 -0400 | [diff] [blame] | 1621 | spin_lock(sb_bgl_lock(sbi, i)); |
Andreas Dilger | 717d50e | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 1622 | if (!ext4_group_desc_csum_verify(sbi, i, gdp)) { |
Josef Bacik | c19204b | 2008-04-29 22:00:28 -0400 | [diff] [blame] | 1623 | printk(KERN_ERR "EXT4-fs: ext4_check_descriptors: " |
Theodore Ts'o | a9df9a4 | 2009-01-05 22:18:16 -0500 | [diff] [blame^] | 1624 | "Checksum for group %u failed (%u!=%u)\n", |
Josef Bacik | c19204b | 2008-04-29 22:00:28 -0400 | [diff] [blame] | 1625 | i, le16_to_cpu(ext4_group_desc_csum(sbi, i, |
| 1626 | gdp)), le16_to_cpu(gdp->bg_checksum)); |
Li Zefan | 7ee1ec4 | 2008-09-08 10:47:19 -0400 | [diff] [blame] | 1627 | if (!(sb->s_flags & MS_RDONLY)) { |
| 1628 | spin_unlock(sb_bgl_lock(sbi, i)); |
Theodore Ts'o | 8a26646 | 2008-07-26 14:34:21 -0400 | [diff] [blame] | 1629 | return 0; |
Li Zefan | 7ee1ec4 | 2008-09-08 10:47:19 -0400 | [diff] [blame] | 1630 | } |
Andreas Dilger | 717d50e | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 1631 | } |
Eric Sandeen | b5f10ee | 2008-08-02 21:21:08 -0400 | [diff] [blame] | 1632 | spin_unlock(sb_bgl_lock(sbi, i)); |
Jose R. Santos | ce42158 | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 1633 | if (!flexbg_flag) |
| 1634 | first_block += EXT4_BLOCKS_PER_GROUP(sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1635 | } |
| 1636 | |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 1637 | ext4_free_blocks_count_set(sbi->s_es, ext4_count_free_blocks(sb)); |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 1638 | 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] | 1639 | return 1; |
| 1640 | } |
| 1641 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1642 | /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1643 | * the superblock) which were deleted from all directories, but held open by |
| 1644 | * a process at the time of a crash. We walk the list and try to delete these |
| 1645 | * inodes at recovery time (only with a read-write filesystem). |
| 1646 | * |
| 1647 | * In order to keep the orphan inode chain consistent during traversal (in |
| 1648 | * case of crash during recovery), we link each inode into the superblock |
| 1649 | * orphan list_head and handle it the same way as an inode deletion during |
| 1650 | * normal operation (which journals the operations for us). |
| 1651 | * |
| 1652 | * We only do an iget() and an iput() on each inode, which is very safe if we |
| 1653 | * accidentally point at an in-use or already deleted inode. The worst that |
| 1654 | * 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] | 1655 | * 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] | 1656 | * e2fsck was run on this filesystem, and it must have already done the orphan |
| 1657 | * inode cleanup for us, so we can safely abort without any further action. |
| 1658 | */ |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 1659 | static void ext4_orphan_cleanup(struct super_block *sb, |
| 1660 | struct ext4_super_block *es) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1661 | { |
| 1662 | unsigned int s_flags = sb->s_flags; |
| 1663 | int nr_orphans = 0, nr_truncates = 0; |
| 1664 | #ifdef CONFIG_QUOTA |
| 1665 | int i; |
| 1666 | #endif |
| 1667 | if (!es->s_last_orphan) { |
| 1668 | jbd_debug(4, "no orphan inodes to clean up\n"); |
| 1669 | return; |
| 1670 | } |
| 1671 | |
Eric Sandeen | a8f48a9 | 2006-12-06 20:40:13 -0800 | [diff] [blame] | 1672 | if (bdev_read_only(sb->s_bdev)) { |
| 1673 | printk(KERN_ERR "EXT4-fs: write access " |
| 1674 | "unavailable, skipping orphan cleanup.\n"); |
| 1675 | return; |
| 1676 | } |
| 1677 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1678 | if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1679 | if (es->s_last_orphan) |
| 1680 | jbd_debug(1, "Errors on filesystem, " |
| 1681 | "clearing orphan list.\n"); |
| 1682 | es->s_last_orphan = 0; |
| 1683 | jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); |
| 1684 | return; |
| 1685 | } |
| 1686 | |
| 1687 | if (s_flags & MS_RDONLY) { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1688 | printk(KERN_INFO "EXT4-fs: %s: orphan cleanup on readonly fs\n", |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1689 | sb->s_id); |
| 1690 | sb->s_flags &= ~MS_RDONLY; |
| 1691 | } |
| 1692 | #ifdef CONFIG_QUOTA |
| 1693 | /* Needed for iput() to work correctly and not trash data */ |
| 1694 | sb->s_flags |= MS_ACTIVE; |
| 1695 | /* Turn on quotas so that they are updated correctly */ |
| 1696 | for (i = 0; i < MAXQUOTAS; i++) { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1697 | if (EXT4_SB(sb)->s_qf_names[i]) { |
| 1698 | int ret = ext4_quota_on_mount(sb, i); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1699 | if (ret < 0) |
| 1700 | printk(KERN_ERR |
Jan Kara | 2c8be6b | 2008-05-13 21:27:55 -0400 | [diff] [blame] | 1701 | "EXT4-fs: Cannot turn on journaled " |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1702 | "quota: error %d\n", ret); |
| 1703 | } |
| 1704 | } |
| 1705 | #endif |
| 1706 | |
| 1707 | while (es->s_last_orphan) { |
| 1708 | struct inode *inode; |
| 1709 | |
Josef Bacik | 97bd42b | 2008-04-29 22:04:56 -0400 | [diff] [blame] | 1710 | inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); |
| 1711 | if (IS_ERR(inode)) { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1712 | es->s_last_orphan = 0; |
| 1713 | break; |
| 1714 | } |
| 1715 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1716 | list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1717 | DQUOT_INIT(inode); |
| 1718 | if (inode->i_nlink) { |
| 1719 | printk(KERN_DEBUG |
Theodore Ts'o | e5f8eab8 | 2008-09-08 22:25:04 -0400 | [diff] [blame] | 1720 | "%s: truncating inode %lu to %lld bytes\n", |
Harvey Harrison | 46e665e | 2008-04-17 10:38:59 -0400 | [diff] [blame] | 1721 | __func__, inode->i_ino, inode->i_size); |
Theodore Ts'o | e5f8eab8 | 2008-09-08 22:25:04 -0400 | [diff] [blame] | 1722 | jbd_debug(2, "truncating inode %lu to %lld bytes\n", |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1723 | inode->i_ino, inode->i_size); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1724 | ext4_truncate(inode); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1725 | nr_truncates++; |
| 1726 | } else { |
| 1727 | printk(KERN_DEBUG |
| 1728 | "%s: deleting unreferenced inode %lu\n", |
Harvey Harrison | 46e665e | 2008-04-17 10:38:59 -0400 | [diff] [blame] | 1729 | __func__, inode->i_ino); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1730 | jbd_debug(2, "deleting unreferenced inode %lu\n", |
| 1731 | inode->i_ino); |
| 1732 | nr_orphans++; |
| 1733 | } |
| 1734 | iput(inode); /* The delete magic happens here! */ |
| 1735 | } |
| 1736 | |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 1737 | #define PLURAL(x) (x), ((x) == 1) ? "" : "s" |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1738 | |
| 1739 | if (nr_orphans) |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1740 | printk(KERN_INFO "EXT4-fs: %s: %d orphan inode%s deleted\n", |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1741 | sb->s_id, PLURAL(nr_orphans)); |
| 1742 | if (nr_truncates) |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1743 | printk(KERN_INFO "EXT4-fs: %s: %d truncate%s cleaned up\n", |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1744 | sb->s_id, PLURAL(nr_truncates)); |
| 1745 | #ifdef CONFIG_QUOTA |
| 1746 | /* Turn quotas off */ |
| 1747 | for (i = 0; i < MAXQUOTAS; i++) { |
| 1748 | if (sb_dqopt(sb)->files[i]) |
Jan Kara | 6f28e08 | 2008-04-28 02:14:34 -0700 | [diff] [blame] | 1749 | vfs_quota_off(sb, i, 0); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1750 | } |
| 1751 | #endif |
| 1752 | sb->s_flags = s_flags; /* Restore MS_RDONLY status */ |
| 1753 | } |
Eric Sandeen | cd2291a | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 1754 | /* |
| 1755 | * Maximal extent format file size. |
| 1756 | * Resulting logical blkno at s_maxbytes must fit in our on-disk |
| 1757 | * extent format containers, within a sector_t, and within i_blocks |
| 1758 | * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, |
| 1759 | * so that won't be a limiting factor. |
| 1760 | * |
| 1761 | * Note, this does *not* consider any metadata overhead for vfs i_blocks. |
| 1762 | */ |
Theodore Ts'o | f287a1a | 2008-10-16 22:50:48 -0400 | [diff] [blame] | 1763 | static loff_t ext4_max_size(int blkbits, int has_huge_files) |
Eric Sandeen | cd2291a | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 1764 | { |
| 1765 | loff_t res; |
| 1766 | loff_t upper_limit = MAX_LFS_FILESIZE; |
| 1767 | |
| 1768 | /* small i_blocks in vfs inode? */ |
Theodore Ts'o | f287a1a | 2008-10-16 22:50:48 -0400 | [diff] [blame] | 1769 | if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { |
Eric Sandeen | cd2291a | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 1770 | /* |
Jens Axboe | b3a6ffe | 2008-12-12 09:51:16 +0100 | [diff] [blame] | 1771 | * CONFIG_LBD is not enabled implies the inode |
Eric Sandeen | cd2291a | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 1772 | * i_block represent total blocks in 512 bytes |
| 1773 | * 32 == size of vfs inode i_blocks * 8 |
| 1774 | */ |
| 1775 | upper_limit = (1LL << 32) - 1; |
| 1776 | |
| 1777 | /* total blocks in file system block size */ |
| 1778 | upper_limit >>= (blkbits - 9); |
| 1779 | upper_limit <<= blkbits; |
| 1780 | } |
| 1781 | |
| 1782 | /* 32-bit extent-start container, ee_block */ |
| 1783 | res = 1LL << 32; |
| 1784 | res <<= blkbits; |
| 1785 | res -= 1; |
| 1786 | |
| 1787 | /* Sanity check against vm- & vfs- imposed limits */ |
| 1788 | if (res > upper_limit) |
| 1789 | res = upper_limit; |
| 1790 | |
| 1791 | return res; |
| 1792 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1793 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1794 | /* |
Eric Sandeen | cd2291a | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 1795 | * 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] | 1796 | * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. |
| 1797 | * 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] | 1798 | */ |
Theodore Ts'o | f287a1a | 2008-10-16 22:50:48 -0400 | [diff] [blame] | 1799 | 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] | 1800 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1801 | loff_t res = EXT4_NDIR_BLOCKS; |
Aneesh Kumar K.V | 0fc1b45 | 2008-01-28 23:58:26 -0500 | [diff] [blame] | 1802 | int meta_blocks; |
| 1803 | loff_t upper_limit; |
| 1804 | /* This is calculated to be the largest file size for a |
Eric Sandeen | cd2291a | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 1805 | * dense, bitmapped file such that the total number of |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1806 | * sectors in the file, including data and all indirect blocks, |
Aneesh Kumar K.V | 0fc1b45 | 2008-01-28 23:58:26 -0500 | [diff] [blame] | 1807 | * does not exceed 2^48 -1 |
| 1808 | * __u32 i_blocks_lo and _u16 i_blocks_high representing the |
| 1809 | * total number of 512 bytes blocks of the file |
| 1810 | */ |
| 1811 | |
Theodore Ts'o | f287a1a | 2008-10-16 22:50:48 -0400 | [diff] [blame] | 1812 | if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { |
Aneesh Kumar K.V | 0fc1b45 | 2008-01-28 23:58:26 -0500 | [diff] [blame] | 1813 | /* |
Jens Axboe | b3a6ffe | 2008-12-12 09:51:16 +0100 | [diff] [blame] | 1814 | * !has_huge_files or CONFIG_LBD is not enabled |
Theodore Ts'o | f287a1a | 2008-10-16 22:50:48 -0400 | [diff] [blame] | 1815 | * implies the inode i_block represent total blocks in |
| 1816 | * 512 bytes 32 == size of vfs inode i_blocks * 8 |
Aneesh Kumar K.V | 0fc1b45 | 2008-01-28 23:58:26 -0500 | [diff] [blame] | 1817 | */ |
| 1818 | upper_limit = (1LL << 32) - 1; |
| 1819 | |
| 1820 | /* total blocks in file system block size */ |
| 1821 | upper_limit >>= (bits - 9); |
| 1822 | |
| 1823 | } else { |
Aneesh Kumar K.V | 8180a56 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 1824 | /* |
| 1825 | * We use 48 bit ext4_inode i_blocks |
| 1826 | * With EXT4_HUGE_FILE_FL set the i_blocks |
| 1827 | * represent total number of blocks in |
| 1828 | * file system block size |
| 1829 | */ |
Aneesh Kumar K.V | 0fc1b45 | 2008-01-28 23:58:26 -0500 | [diff] [blame] | 1830 | upper_limit = (1LL << 48) - 1; |
| 1831 | |
Aneesh Kumar K.V | 0fc1b45 | 2008-01-28 23:58:26 -0500 | [diff] [blame] | 1832 | } |
| 1833 | |
| 1834 | /* indirect blocks */ |
| 1835 | meta_blocks = 1; |
| 1836 | /* double indirect blocks */ |
| 1837 | meta_blocks += 1 + (1LL << (bits-2)); |
| 1838 | /* tripple indirect blocks */ |
| 1839 | meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); |
| 1840 | |
| 1841 | upper_limit -= meta_blocks; |
| 1842 | upper_limit <<= bits; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1843 | |
| 1844 | res += 1LL << (bits-2); |
| 1845 | res += 1LL << (2*(bits-2)); |
| 1846 | res += 1LL << (3*(bits-2)); |
| 1847 | res <<= bits; |
| 1848 | if (res > upper_limit) |
| 1849 | res = upper_limit; |
Aneesh Kumar K.V | 0fc1b45 | 2008-01-28 23:58:26 -0500 | [diff] [blame] | 1850 | |
| 1851 | if (res > MAX_LFS_FILESIZE) |
| 1852 | res = MAX_LFS_FILESIZE; |
| 1853 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1854 | return res; |
| 1855 | } |
| 1856 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1857 | static ext4_fsblk_t descriptor_loc(struct super_block *sb, |
Andrew Morton | 70bbb3e | 2006-10-11 01:21:20 -0700 | [diff] [blame] | 1858 | ext4_fsblk_t logical_sb_block, int nr) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1859 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1860 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
Avantika Mathur | fd2d429 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 1861 | ext4_group_t bg, first_meta_bg; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1862 | int has_super = 0; |
| 1863 | |
| 1864 | first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); |
| 1865 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1866 | if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1867 | nr < first_meta_bg) |
Andrew Morton | 70bbb3e | 2006-10-11 01:21:20 -0700 | [diff] [blame] | 1868 | return logical_sb_block + nr + 1; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1869 | bg = sbi->s_desc_per_block * nr; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1870 | if (ext4_bg_has_super(sb, bg)) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1871 | has_super = 1; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1872 | return (has_super + ext4_group_first_block_no(sb, bg)); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1873 | } |
| 1874 | |
Alex Tomas | c9de560 | 2008-01-29 00:19:52 -0500 | [diff] [blame] | 1875 | /** |
| 1876 | * ext4_get_stripe_size: Get the stripe size. |
| 1877 | * @sbi: In memory super block info |
| 1878 | * |
| 1879 | * If we have specified it via mount option, then |
| 1880 | * use the mount option value. If the value specified at mount time is |
| 1881 | * greater than the blocks per group use the super block value. |
| 1882 | * If the super block value is greater than blocks per group return 0. |
| 1883 | * Allocator needs it be less than blocks per group. |
| 1884 | * |
| 1885 | */ |
| 1886 | static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) |
| 1887 | { |
| 1888 | unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); |
| 1889 | unsigned long stripe_width = |
| 1890 | le32_to_cpu(sbi->s_es->s_raid_stripe_width); |
| 1891 | |
| 1892 | if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) |
| 1893 | return sbi->s_stripe; |
| 1894 | |
| 1895 | if (stripe_width <= sbi->s_blocks_per_group) |
| 1896 | return stripe_width; |
| 1897 | |
| 1898 | if (stride <= sbi->s_blocks_per_group) |
| 1899 | return stride; |
| 1900 | |
| 1901 | return 0; |
| 1902 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1903 | |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 1904 | 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] | 1905 | __releases(kernel_lock) |
| 1906 | __acquires(kernel_lock) |
Aneesh Kumar K.V | 1d03ec9 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 1907 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1908 | { |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 1909 | struct buffer_head *bh; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1910 | struct ext4_super_block *es = NULL; |
| 1911 | struct ext4_sb_info *sbi; |
| 1912 | ext4_fsblk_t block; |
| 1913 | ext4_fsblk_t sb_block = get_sb_block(&data); |
Andrew Morton | 70bbb3e | 2006-10-11 01:21:20 -0700 | [diff] [blame] | 1914 | ext4_fsblk_t logical_sb_block; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1915 | unsigned long offset = 0; |
| 1916 | unsigned int journal_inum = 0; |
| 1917 | unsigned long journal_devnum = 0; |
| 1918 | unsigned long def_mount_opts; |
| 1919 | struct inode *root; |
Theodore Ts'o | 9f6200b | 2008-09-23 09:18:24 -0400 | [diff] [blame] | 1920 | char *cp; |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 1921 | const char *descr; |
David Howells | 1d1fe1e | 2008-02-07 00:15:37 -0800 | [diff] [blame] | 1922 | int ret = -EINVAL; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1923 | int blocksize; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1924 | int db_count; |
| 1925 | int i; |
Theodore Ts'o | f287a1a | 2008-10-16 22:50:48 -0400 | [diff] [blame] | 1926 | int needs_recovery, has_huge_files; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1927 | __le32 features; |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 1928 | __u64 blocks_count; |
Peter Zijlstra | 833f407 | 2007-10-16 23:25:45 -0700 | [diff] [blame] | 1929 | int err; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1930 | |
| 1931 | sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); |
| 1932 | if (!sbi) |
| 1933 | return -ENOMEM; |
| 1934 | sb->s_fs_info = sbi; |
| 1935 | sbi->s_mount_opt = 0; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1936 | sbi->s_resuid = EXT4_DEF_RESUID; |
| 1937 | sbi->s_resgid = EXT4_DEF_RESGID; |
Theodore Ts'o | 240799c | 2008-10-09 23:53:47 -0400 | [diff] [blame] | 1938 | sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; |
Miklos Szeredi | d9c9bef1 | 2007-10-16 23:26:27 -0700 | [diff] [blame] | 1939 | sbi->s_sb_block = sb_block; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1940 | |
| 1941 | unlock_kernel(); |
| 1942 | |
Theodore Ts'o | 9f6200b | 2008-09-23 09:18:24 -0400 | [diff] [blame] | 1943 | /* Cleanup superblock name */ |
| 1944 | for (cp = sb->s_id; (cp = strchr(cp, '/'));) |
| 1945 | *cp = '!'; |
| 1946 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1947 | blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1948 | if (!blocksize) { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1949 | printk(KERN_ERR "EXT4-fs: unable to set blocksize\n"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1950 | goto out_fail; |
| 1951 | } |
| 1952 | |
| 1953 | /* |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1954 | * The ext4 superblock will not be buffer aligned for other than 1kB |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1955 | * block sizes. We need to calculate the offset from buffer start. |
| 1956 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1957 | if (blocksize != EXT4_MIN_BLOCK_SIZE) { |
Andrew Morton | 70bbb3e | 2006-10-11 01:21:20 -0700 | [diff] [blame] | 1958 | logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; |
| 1959 | offset = do_div(logical_sb_block, blocksize); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1960 | } else { |
Andrew Morton | 70bbb3e | 2006-10-11 01:21:20 -0700 | [diff] [blame] | 1961 | logical_sb_block = sb_block; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1962 | } |
| 1963 | |
Andrew Morton | 70bbb3e | 2006-10-11 01:21:20 -0700 | [diff] [blame] | 1964 | if (!(bh = sb_bread(sb, logical_sb_block))) { |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 1965 | printk(KERN_ERR "EXT4-fs: unable to read superblock\n"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1966 | goto out_fail; |
| 1967 | } |
| 1968 | /* |
| 1969 | * Note: s_es must be initialized as soon as possible because |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1970 | * some ext4 macro-instructions depend on its value |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1971 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1972 | es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1973 | sbi->s_es = es; |
| 1974 | sb->s_magic = le16_to_cpu(es->s_magic); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1975 | if (sb->s_magic != EXT4_SUPER_MAGIC) |
| 1976 | goto cantfind_ext4; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1977 | |
| 1978 | /* Set defaults before we parse the mount options */ |
| 1979 | def_mount_opts = le32_to_cpu(es->s_default_mount_opts); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1980 | if (def_mount_opts & EXT4_DEFM_DEBUG) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1981 | set_opt(sbi->s_mount_opt, DEBUG); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1982 | if (def_mount_opts & EXT4_DEFM_BSDGROUPS) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1983 | set_opt(sbi->s_mount_opt, GRPID); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1984 | if (def_mount_opts & EXT4_DEFM_UID16) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1985 | set_opt(sbi->s_mount_opt, NO_UID32); |
Theodore Ts'o | 03010a3 | 2008-10-10 20:02:48 -0400 | [diff] [blame] | 1986 | #ifdef CONFIG_EXT4_FS_XATTR |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1987 | if (def_mount_opts & EXT4_DEFM_XATTR_USER) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1988 | set_opt(sbi->s_mount_opt, XATTR_USER); |
Hugh Dickins | 2e7842b | 2007-02-10 01:46:13 -0800 | [diff] [blame] | 1989 | #endif |
Theodore Ts'o | 03010a3 | 2008-10-10 20:02:48 -0400 | [diff] [blame] | 1990 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1991 | if (def_mount_opts & EXT4_DEFM_ACL) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1992 | set_opt(sbi->s_mount_opt, POSIX_ACL); |
Hugh Dickins | 2e7842b | 2007-02-10 01:46:13 -0800 | [diff] [blame] | 1993 | #endif |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1994 | if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) |
| 1995 | sbi->s_mount_opt |= EXT4_MOUNT_JOURNAL_DATA; |
| 1996 | else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) |
| 1997 | sbi->s_mount_opt |= EXT4_MOUNT_ORDERED_DATA; |
| 1998 | else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) |
| 1999 | sbi->s_mount_opt |= EXT4_MOUNT_WRITEBACK_DATA; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2000 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2001 | if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2002 | set_opt(sbi->s_mount_opt, ERRORS_PANIC); |
Aneesh Kumar K.V | bb4f397 | 2008-01-28 23:58:26 -0500 | [diff] [blame] | 2003 | 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] | 2004 | set_opt(sbi->s_mount_opt, ERRORS_CONT); |
Aneesh Kumar K.V | bb4f397 | 2008-01-28 23:58:26 -0500 | [diff] [blame] | 2005 | else |
| 2006 | set_opt(sbi->s_mount_opt, ERRORS_RO); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2007 | |
| 2008 | sbi->s_resuid = le16_to_cpu(es->s_def_resuid); |
| 2009 | sbi->s_resgid = le16_to_cpu(es->s_def_resgid); |
Theodore Ts'o | 3077384 | 2009-01-03 20:27:38 -0500 | [diff] [blame] | 2010 | sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; |
| 2011 | sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; |
| 2012 | sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2013 | |
| 2014 | set_opt(sbi->s_mount_opt, RESERVATION); |
Eric Sandeen | 571640c | 2008-05-26 12:29:46 -0400 | [diff] [blame] | 2015 | set_opt(sbi->s_mount_opt, BARRIER); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2016 | |
Mingming Cao | 1e2462f | 2007-07-18 09:00:55 -0400 | [diff] [blame] | 2017 | /* |
| 2018 | * turn on extents feature by default in ext4 filesystem |
Eric Sandeen | e4079a1 | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 2019 | * only if feature flag already set by mkfs or tune2fs. |
| 2020 | * Use -o noextents to turn it off |
Mingming Cao | 1e2462f | 2007-07-18 09:00:55 -0400 | [diff] [blame] | 2021 | */ |
Eric Sandeen | e4079a1 | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 2022 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_EXTENTS)) |
| 2023 | set_opt(sbi->s_mount_opt, EXTENTS); |
| 2024 | else |
| 2025 | ext4_warning(sb, __func__, |
| 2026 | "extents feature not enabled on this filesystem, " |
Theodore Ts'o | fde4d95 | 2009-01-05 22:17:35 -0500 | [diff] [blame] | 2027 | "use tune2fs."); |
Mingming Cao | 1e2462f | 2007-07-18 09:00:55 -0400 | [diff] [blame] | 2028 | |
Aneesh Kumar K.V | dd919b9 | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 2029 | /* |
| 2030 | * enable delayed allocation by default |
| 2031 | * Use -o nodelalloc to turn it off |
| 2032 | */ |
| 2033 | set_opt(sbi->s_mount_opt, DELALLOC); |
| 2034 | |
| 2035 | |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 2036 | if (!parse_options((char *) data, sb, &journal_inum, &journal_devnum, |
| 2037 | NULL, 0)) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2038 | goto failed_mount; |
| 2039 | |
| 2040 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2041 | ((sbi->s_mount_opt & EXT4_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2042 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2043 | if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && |
| 2044 | (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || |
| 2045 | EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || |
| 2046 | EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2047 | printk(KERN_WARNING |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2048 | "EXT4-fs warning: feature flags set on rev 0 fs, " |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2049 | "running e2fsck is recommended\n"); |
Theodore Tso | 469108f | 2008-02-10 01:11:44 -0500 | [diff] [blame] | 2050 | |
| 2051 | /* |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2052 | * Check feature flags regardless of the revision level, since we |
| 2053 | * previously didn't change the revision level when setting the flags, |
| 2054 | * so there is a chance incompat flags are set on a rev 0 filesystem. |
| 2055 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2056 | features = EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2057 | if (features) { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2058 | printk(KERN_ERR "EXT4-fs: %s: couldn't mount because of " |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2059 | "unsupported optional features (%x).\n", |
| 2060 | sb->s_id, le32_to_cpu(features)); |
| 2061 | goto failed_mount; |
| 2062 | } |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2063 | features = EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2064 | if (!(sb->s_flags & MS_RDONLY) && features) { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2065 | printk(KERN_ERR "EXT4-fs: %s: couldn't mount RDWR because of " |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2066 | "unsupported optional features (%x).\n", |
| 2067 | sb->s_id, le32_to_cpu(features)); |
| 2068 | goto failed_mount; |
| 2069 | } |
Theodore Ts'o | f287a1a | 2008-10-16 22:50:48 -0400 | [diff] [blame] | 2070 | has_huge_files = EXT4_HAS_RO_COMPAT_FEATURE(sb, |
| 2071 | EXT4_FEATURE_RO_COMPAT_HUGE_FILE); |
| 2072 | if (has_huge_files) { |
Aneesh Kumar K.V | 0fc1b45 | 2008-01-28 23:58:26 -0500 | [diff] [blame] | 2073 | /* |
| 2074 | * Large file size enabled file system can only be |
Jens Axboe | b3a6ffe | 2008-12-12 09:51:16 +0100 | [diff] [blame] | 2075 | * mount if kernel is build with CONFIG_LBD |
Aneesh Kumar K.V | 0fc1b45 | 2008-01-28 23:58:26 -0500 | [diff] [blame] | 2076 | */ |
| 2077 | if (sizeof(root->i_blocks) < sizeof(u64) && |
| 2078 | !(sb->s_flags & MS_RDONLY)) { |
| 2079 | printk(KERN_ERR "EXT4-fs: %s: Filesystem with huge " |
| 2080 | "files cannot be mounted read-write " |
Jens Axboe | b3a6ffe | 2008-12-12 09:51:16 +0100 | [diff] [blame] | 2081 | "without CONFIG_LBD.\n", sb->s_id); |
Aneesh Kumar K.V | 0fc1b45 | 2008-01-28 23:58:26 -0500 | [diff] [blame] | 2082 | goto failed_mount; |
| 2083 | } |
| 2084 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2085 | blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); |
| 2086 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2087 | if (blocksize < EXT4_MIN_BLOCK_SIZE || |
| 2088 | blocksize > EXT4_MAX_BLOCK_SIZE) { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2089 | printk(KERN_ERR |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2090 | "EXT4-fs: Unsupported filesystem blocksize %d on %s.\n", |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2091 | blocksize, sb->s_id); |
| 2092 | goto failed_mount; |
| 2093 | } |
| 2094 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2095 | if (sb->s_blocksize != blocksize) { |
Aneesh Kumar K.V | ce40733 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 2096 | |
| 2097 | /* Validate the filesystem blocksize */ |
| 2098 | if (!sb_set_blocksize(sb, blocksize)) { |
| 2099 | printk(KERN_ERR "EXT4-fs: bad block size %d.\n", |
| 2100 | blocksize); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2101 | goto failed_mount; |
| 2102 | } |
| 2103 | |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 2104 | brelse(bh); |
Andrew Morton | 70bbb3e | 2006-10-11 01:21:20 -0700 | [diff] [blame] | 2105 | logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; |
| 2106 | offset = do_div(logical_sb_block, blocksize); |
| 2107 | bh = sb_bread(sb, logical_sb_block); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2108 | if (!bh) { |
| 2109 | printk(KERN_ERR |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2110 | "EXT4-fs: Can't read superblock on 2nd try.\n"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2111 | goto failed_mount; |
| 2112 | } |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2113 | es = (struct ext4_super_block *)(((char *)bh->b_data) + offset); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2114 | sbi->s_es = es; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2115 | if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 2116 | printk(KERN_ERR |
| 2117 | "EXT4-fs: Magic mismatch, very weird !\n"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2118 | goto failed_mount; |
| 2119 | } |
| 2120 | } |
| 2121 | |
Theodore Ts'o | f287a1a | 2008-10-16 22:50:48 -0400 | [diff] [blame] | 2122 | sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, |
| 2123 | has_huge_files); |
| 2124 | 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] | 2125 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2126 | if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { |
| 2127 | sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; |
| 2128 | sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2129 | } else { |
| 2130 | sbi->s_inode_size = le16_to_cpu(es->s_inode_size); |
| 2131 | sbi->s_first_ino = le32_to_cpu(es->s_first_ino); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2132 | if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || |
Vignesh Babu | 1330593 | 2007-07-18 09:11:02 -0400 | [diff] [blame] | 2133 | (!is_power_of_2(sbi->s_inode_size)) || |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2134 | (sbi->s_inode_size > blocksize)) { |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 2135 | printk(KERN_ERR |
| 2136 | "EXT4-fs: unsupported inode size: %d\n", |
| 2137 | sbi->s_inode_size); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2138 | goto failed_mount; |
| 2139 | } |
Kalpak Shah | ef7f383 | 2007-07-18 09:15:20 -0400 | [diff] [blame] | 2140 | if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) |
| 2141 | sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2142 | } |
Alexandre Ratchov | 0d1ee42 | 2006-10-11 01:21:14 -0700 | [diff] [blame] | 2143 | sbi->s_desc_size = le16_to_cpu(es->s_desc_size); |
| 2144 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 2145 | if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || |
Alexandre Ratchov | 0d1ee42 | 2006-10-11 01:21:14 -0700 | [diff] [blame] | 2146 | sbi->s_desc_size > EXT4_MAX_DESC_SIZE || |
vignesh babu | d8ea6cf | 2007-10-16 23:27:14 -0700 | [diff] [blame] | 2147 | !is_power_of_2(sbi->s_desc_size)) { |
Alexandre Ratchov | 0d1ee42 | 2006-10-11 01:21:14 -0700 | [diff] [blame] | 2148 | printk(KERN_ERR |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 2149 | "EXT4-fs: unsupported descriptor size %lu\n", |
Alexandre Ratchov | 0d1ee42 | 2006-10-11 01:21:14 -0700 | [diff] [blame] | 2150 | sbi->s_desc_size); |
| 2151 | goto failed_mount; |
| 2152 | } |
| 2153 | } else |
| 2154 | sbi->s_desc_size = EXT4_MIN_DESC_SIZE; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2155 | 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] | 2156 | 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] | 2157 | if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2158 | goto cantfind_ext4; |
| 2159 | sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2160 | if (sbi->s_inodes_per_block == 0) |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2161 | goto cantfind_ext4; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2162 | sbi->s_itb_per_group = sbi->s_inodes_per_group / |
| 2163 | sbi->s_inodes_per_block; |
Alexandre Ratchov | 0d1ee42 | 2006-10-11 01:21:14 -0700 | [diff] [blame] | 2164 | sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2165 | sbi->s_sbh = bh; |
| 2166 | sbi->s_mount_state = le16_to_cpu(es->s_state); |
Fengguang Wu | e57aa83 | 2007-10-16 23:26:25 -0700 | [diff] [blame] | 2167 | sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); |
| 2168 | sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 2169 | for (i = 0; i < 4; i++) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2170 | sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); |
| 2171 | sbi->s_def_hash_version = es->s_def_hash_version; |
Theodore Ts'o | f99b258 | 2008-10-28 13:21:44 -0400 | [diff] [blame] | 2172 | i = le32_to_cpu(es->s_flags); |
| 2173 | if (i & EXT2_FLAGS_UNSIGNED_HASH) |
| 2174 | sbi->s_hash_unsigned = 3; |
| 2175 | else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { |
| 2176 | #ifdef __CHAR_UNSIGNED__ |
| 2177 | es->s_flags |= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); |
| 2178 | sbi->s_hash_unsigned = 3; |
| 2179 | #else |
| 2180 | es->s_flags |= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); |
| 2181 | #endif |
| 2182 | sb->s_dirt = 1; |
| 2183 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2184 | |
| 2185 | if (sbi->s_blocks_per_group > blocksize * 8) { |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 2186 | printk(KERN_ERR |
| 2187 | "EXT4-fs: #blocks per group too big: %lu\n", |
| 2188 | sbi->s_blocks_per_group); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2189 | goto failed_mount; |
| 2190 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2191 | if (sbi->s_inodes_per_group > blocksize * 8) { |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 2192 | printk(KERN_ERR |
| 2193 | "EXT4-fs: #inodes per group too big: %lu\n", |
| 2194 | sbi->s_inodes_per_group); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2195 | goto failed_mount; |
| 2196 | } |
| 2197 | |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 2198 | if (ext4_blocks_count(es) > |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2199 | (sector_t)(~0ULL) >> (sb->s_blocksize_bits - 9)) { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2200 | printk(KERN_ERR "EXT4-fs: filesystem on %s:" |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2201 | " too large to mount safely\n", sb->s_id); |
| 2202 | if (sizeof(sector_t) < 8) |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2203 | printk(KERN_WARNING "EXT4-fs: CONFIG_LBD not " |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2204 | "enabled\n"); |
| 2205 | goto failed_mount; |
| 2206 | } |
| 2207 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2208 | if (EXT4_BLOCKS_PER_GROUP(sb) == 0) |
| 2209 | goto cantfind_ext4; |
Eric Sandeen | e7c9559 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 2210 | |
| 2211 | /* ensure blocks_count calculation below doesn't sign-extend */ |
| 2212 | if (ext4_blocks_count(es) + EXT4_BLOCKS_PER_GROUP(sb) < |
| 2213 | le32_to_cpu(es->s_first_data_block) + 1) { |
| 2214 | printk(KERN_WARNING "EXT4-fs: bad geometry: block count %llu, " |
| 2215 | "first data block %u, blocks per group %lu\n", |
| 2216 | ext4_blocks_count(es), |
| 2217 | le32_to_cpu(es->s_first_data_block), |
| 2218 | EXT4_BLOCKS_PER_GROUP(sb)); |
| 2219 | goto failed_mount; |
| 2220 | } |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 2221 | blocks_count = (ext4_blocks_count(es) - |
| 2222 | le32_to_cpu(es->s_first_data_block) + |
| 2223 | EXT4_BLOCKS_PER_GROUP(sb) - 1); |
| 2224 | do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); |
| 2225 | sbi->s_groups_count = blocks_count; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2226 | db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / |
| 2227 | EXT4_DESC_PER_BLOCK(sb); |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 2228 | sbi->s_group_desc = kmalloc(db_count * sizeof(struct buffer_head *), |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2229 | GFP_KERNEL); |
| 2230 | if (sbi->s_group_desc == NULL) { |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 2231 | printk(KERN_ERR "EXT4-fs: not enough memory\n"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2232 | goto failed_mount; |
| 2233 | } |
| 2234 | |
Alexander Beregalov | 3244fcb | 2008-10-12 17:27:49 -0400 | [diff] [blame] | 2235 | #ifdef CONFIG_PROC_FS |
Theodore Ts'o | 9f6200b | 2008-09-23 09:18:24 -0400 | [diff] [blame] | 2236 | if (ext4_proc_root) |
| 2237 | sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); |
| 2238 | |
Theodore Ts'o | 240799c | 2008-10-09 23:53:47 -0400 | [diff] [blame] | 2239 | if (sbi->s_proc) |
| 2240 | proc_create_data("inode_readahead_blks", 0644, sbi->s_proc, |
| 2241 | &ext4_ui_proc_fops, |
| 2242 | &sbi->s_inode_readahead_blks); |
Alexander Beregalov | 3244fcb | 2008-10-12 17:27:49 -0400 | [diff] [blame] | 2243 | #endif |
Theodore Ts'o | 240799c | 2008-10-09 23:53:47 -0400 | [diff] [blame] | 2244 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2245 | bgl_lock_init(&sbi->s_blockgroup_lock); |
| 2246 | |
| 2247 | for (i = 0; i < db_count; i++) { |
Andrew Morton | 70bbb3e | 2006-10-11 01:21:20 -0700 | [diff] [blame] | 2248 | block = descriptor_loc(sb, logical_sb_block, i); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2249 | sbi->s_group_desc[i] = sb_bread(sb, block); |
| 2250 | if (!sbi->s_group_desc[i]) { |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 2251 | printk(KERN_ERR "EXT4-fs: " |
| 2252 | "can't read group descriptor %d\n", i); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2253 | db_count = i; |
| 2254 | goto failed_mount2; |
| 2255 | } |
| 2256 | } |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 2257 | if (!ext4_check_descriptors(sb)) { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2258 | printk(KERN_ERR "EXT4-fs: group descriptors corrupted!\n"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2259 | goto failed_mount2; |
| 2260 | } |
Jose R. Santos | 772cb7c | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 2261 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) |
| 2262 | if (!ext4_fill_flex_info(sb)) { |
| 2263 | printk(KERN_ERR |
| 2264 | "EXT4-fs: unable to initialize " |
| 2265 | "flex_bg meta info!\n"); |
| 2266 | goto failed_mount2; |
| 2267 | } |
| 2268 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2269 | sbi->s_gdb_count = db_count; |
| 2270 | get_random_bytes(&sbi->s_next_generation, sizeof(u32)); |
| 2271 | spin_lock_init(&sbi->s_next_gen_lock); |
| 2272 | |
Peter Zijlstra | 833f407 | 2007-10-16 23:25:45 -0700 | [diff] [blame] | 2273 | err = percpu_counter_init(&sbi->s_freeblocks_counter, |
| 2274 | ext4_count_free_blocks(sb)); |
| 2275 | if (!err) { |
| 2276 | err = percpu_counter_init(&sbi->s_freeinodes_counter, |
| 2277 | ext4_count_free_inodes(sb)); |
| 2278 | } |
| 2279 | if (!err) { |
| 2280 | err = percpu_counter_init(&sbi->s_dirs_counter, |
| 2281 | ext4_count_dirs(sb)); |
| 2282 | } |
Aneesh Kumar K.V | 6bc6e63 | 2008-10-10 09:39:00 -0400 | [diff] [blame] | 2283 | if (!err) { |
| 2284 | err = percpu_counter_init(&sbi->s_dirtyblocks_counter, 0); |
| 2285 | } |
Peter Zijlstra | 833f407 | 2007-10-16 23:25:45 -0700 | [diff] [blame] | 2286 | if (err) { |
| 2287 | printk(KERN_ERR "EXT4-fs: insufficient memory\n"); |
| 2288 | goto failed_mount3; |
| 2289 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2290 | |
Alex Tomas | c9de560 | 2008-01-29 00:19:52 -0500 | [diff] [blame] | 2291 | sbi->s_stripe = ext4_get_stripe_size(sbi); |
| 2292 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2293 | /* |
| 2294 | * set up enough so that it can read an inode |
| 2295 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2296 | sb->s_op = &ext4_sops; |
| 2297 | sb->s_export_op = &ext4_export_ops; |
| 2298 | sb->s_xattr = ext4_xattr_handlers; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2299 | #ifdef CONFIG_QUOTA |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2300 | sb->s_qcop = &ext4_qctl_operations; |
| 2301 | sb->dq_op = &ext4_quota_operations; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2302 | #endif |
| 2303 | INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ |
| 2304 | |
| 2305 | sb->s_root = NULL; |
| 2306 | |
| 2307 | needs_recovery = (es->s_last_orphan != 0 || |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2308 | EXT4_HAS_INCOMPAT_FEATURE(sb, |
| 2309 | EXT4_FEATURE_INCOMPAT_RECOVER)); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2310 | |
| 2311 | /* |
| 2312 | * The first inode we look at is the journal inode. Don't try |
| 2313 | * root first: it may be modified in the journal! |
| 2314 | */ |
| 2315 | if (!test_opt(sb, NOLOAD) && |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2316 | EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { |
| 2317 | if (ext4_load_journal(sb, es, journal_devnum)) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2318 | goto failed_mount3; |
Theodore Ts'o | 624080e | 2008-06-06 17:50:40 -0400 | [diff] [blame] | 2319 | if (!(sb->s_flags & MS_RDONLY) && |
| 2320 | EXT4_SB(sb)->s_journal->j_failed_commit) { |
| 2321 | printk(KERN_CRIT "EXT4-fs error (device %s): " |
| 2322 | "ext4_fill_super: Journal transaction " |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 2323 | "%u is corrupt\n", sb->s_id, |
Theodore Ts'o | 624080e | 2008-06-06 17:50:40 -0400 | [diff] [blame] | 2324 | EXT4_SB(sb)->s_journal->j_failed_commit); |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 2325 | if (test_opt(sb, ERRORS_RO)) { |
| 2326 | printk(KERN_CRIT |
| 2327 | "Mounting filesystem read-only\n"); |
Theodore Ts'o | 624080e | 2008-06-06 17:50:40 -0400 | [diff] [blame] | 2328 | sb->s_flags |= MS_RDONLY; |
| 2329 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; |
| 2330 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); |
| 2331 | } |
| 2332 | if (test_opt(sb, ERRORS_PANIC)) { |
| 2333 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; |
| 2334 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); |
| 2335 | ext4_commit_super(sb, es, 1); |
Theodore Ts'o | 624080e | 2008-06-06 17:50:40 -0400 | [diff] [blame] | 2336 | goto failed_mount4; |
| 2337 | } |
| 2338 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2339 | } else if (journal_inum) { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2340 | if (ext4_create_journal(sb, es, journal_inum)) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2341 | goto failed_mount3; |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 2342 | } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && |
| 2343 | EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { |
| 2344 | printk(KERN_ERR "EXT4-fs: required journal recovery " |
| 2345 | "suppressed and not mounted read-only\n"); |
| 2346 | goto failed_mount4; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2347 | } else { |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 2348 | clear_opt(sbi->s_mount_opt, DATA_FLAGS); |
| 2349 | set_opt(sbi->s_mount_opt, WRITEBACK_DATA); |
| 2350 | sbi->s_journal = NULL; |
| 2351 | needs_recovery = 0; |
| 2352 | goto no_journal; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2353 | } |
| 2354 | |
Jose R. Santos | eb40a09 | 2007-07-18 08:37:25 -0400 | [diff] [blame] | 2355 | if (ext4_blocks_count(es) > 0xffffffffULL && |
| 2356 | !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, |
| 2357 | JBD2_FEATURE_INCOMPAT_64BIT)) { |
| 2358 | printk(KERN_ERR "ext4: Failed to set 64-bit journal feature\n"); |
| 2359 | goto failed_mount4; |
| 2360 | } |
| 2361 | |
Girish Shilamkar | 818d276 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 2362 | if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { |
| 2363 | jbd2_journal_set_features(sbi->s_journal, |
| 2364 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, |
| 2365 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); |
| 2366 | } else if (test_opt(sb, JOURNAL_CHECKSUM)) { |
| 2367 | jbd2_journal_set_features(sbi->s_journal, |
| 2368 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, 0); |
| 2369 | jbd2_journal_clear_features(sbi->s_journal, 0, 0, |
| 2370 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); |
| 2371 | } else { |
| 2372 | jbd2_journal_clear_features(sbi->s_journal, |
| 2373 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, |
| 2374 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); |
| 2375 | } |
| 2376 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2377 | /* We have now updated the journal if required, so we can |
| 2378 | * validate the data journaling mode. */ |
| 2379 | switch (test_opt(sb, DATA_FLAGS)) { |
| 2380 | case 0: |
| 2381 | /* No mode set, assume a default based on the journal |
Andrew Morton | 63f5793 | 2006-10-11 01:21:24 -0700 | [diff] [blame] | 2382 | * capabilities: ORDERED_DATA if the journal can |
| 2383 | * cope, else JOURNAL_DATA |
| 2384 | */ |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 2385 | if (jbd2_journal_check_available_features |
| 2386 | (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2387 | set_opt(sbi->s_mount_opt, ORDERED_DATA); |
| 2388 | else |
| 2389 | set_opt(sbi->s_mount_opt, JOURNAL_DATA); |
| 2390 | break; |
| 2391 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2392 | case EXT4_MOUNT_ORDERED_DATA: |
| 2393 | case EXT4_MOUNT_WRITEBACK_DATA: |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 2394 | if (!jbd2_journal_check_available_features |
| 2395 | (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2396 | printk(KERN_ERR "EXT4-fs: Journal does not support " |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2397 | "requested data journaling mode\n"); |
| 2398 | goto failed_mount4; |
| 2399 | } |
| 2400 | default: |
| 2401 | break; |
| 2402 | } |
| 2403 | |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 2404 | no_journal: |
| 2405 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2406 | if (test_opt(sb, NOBH)) { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2407 | if (!(test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA)) { |
| 2408 | printk(KERN_WARNING "EXT4-fs: Ignoring nobh option - " |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2409 | "its supported only with writeback mode\n"); |
| 2410 | clear_opt(sbi->s_mount_opt, NOBH); |
| 2411 | } |
| 2412 | } |
| 2413 | /* |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 2414 | * The jbd2_journal_load will have done any necessary log recovery, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2415 | * so we can safely mount the rest of the filesystem now. |
| 2416 | */ |
| 2417 | |
David Howells | 1d1fe1e | 2008-02-07 00:15:37 -0800 | [diff] [blame] | 2418 | root = ext4_iget(sb, EXT4_ROOT_INO); |
| 2419 | if (IS_ERR(root)) { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2420 | printk(KERN_ERR "EXT4-fs: get root inode failed\n"); |
David Howells | 1d1fe1e | 2008-02-07 00:15:37 -0800 | [diff] [blame] | 2421 | ret = PTR_ERR(root); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2422 | goto failed_mount4; |
| 2423 | } |
| 2424 | if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { |
David Howells | 1d1fe1e | 2008-02-07 00:15:37 -0800 | [diff] [blame] | 2425 | iput(root); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2426 | printk(KERN_ERR "EXT4-fs: corrupt root inode, run e2fsck\n"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2427 | goto failed_mount4; |
| 2428 | } |
David Howells | 1d1fe1e | 2008-02-07 00:15:37 -0800 | [diff] [blame] | 2429 | sb->s_root = d_alloc_root(root); |
| 2430 | if (!sb->s_root) { |
| 2431 | printk(KERN_ERR "EXT4-fs: get root dentry failed\n"); |
| 2432 | iput(root); |
| 2433 | ret = -ENOMEM; |
| 2434 | goto failed_mount4; |
| 2435 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2436 | |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 2437 | ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY); |
Kalpak Shah | ef7f383 | 2007-07-18 09:15:20 -0400 | [diff] [blame] | 2438 | |
| 2439 | /* determine the minimum size of new large inodes, if present */ |
| 2440 | if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { |
| 2441 | sbi->s_want_extra_isize = sizeof(struct ext4_inode) - |
| 2442 | EXT4_GOOD_OLD_INODE_SIZE; |
| 2443 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, |
| 2444 | EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { |
| 2445 | if (sbi->s_want_extra_isize < |
| 2446 | le16_to_cpu(es->s_want_extra_isize)) |
| 2447 | sbi->s_want_extra_isize = |
| 2448 | le16_to_cpu(es->s_want_extra_isize); |
| 2449 | if (sbi->s_want_extra_isize < |
| 2450 | le16_to_cpu(es->s_min_extra_isize)) |
| 2451 | sbi->s_want_extra_isize = |
| 2452 | le16_to_cpu(es->s_min_extra_isize); |
| 2453 | } |
| 2454 | } |
| 2455 | /* Check if enough inode space is available */ |
| 2456 | if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > |
| 2457 | sbi->s_inode_size) { |
| 2458 | sbi->s_want_extra_isize = sizeof(struct ext4_inode) - |
| 2459 | EXT4_GOOD_OLD_INODE_SIZE; |
| 2460 | printk(KERN_INFO "EXT4-fs: required extra inode space not" |
| 2461 | "available.\n"); |
| 2462 | } |
| 2463 | |
Aneesh Kumar K.V | c2774d8 | 2008-10-10 20:07:20 -0400 | [diff] [blame] | 2464 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { |
| 2465 | printk(KERN_WARNING "EXT4-fs: Ignoring delalloc option - " |
| 2466 | "requested data journaling mode\n"); |
| 2467 | clear_opt(sbi->s_mount_opt, DELALLOC); |
| 2468 | } else if (test_opt(sb, DELALLOC)) |
| 2469 | printk(KERN_INFO "EXT4-fs: delayed allocation enabled\n"); |
| 2470 | |
| 2471 | ext4_ext_init(sb); |
| 2472 | err = ext4_mb_init(sb, needs_recovery); |
| 2473 | if (err) { |
| 2474 | printk(KERN_ERR "EXT4-fs: failed to initalize mballoc (%d)\n", |
| 2475 | err); |
| 2476 | goto failed_mount4; |
| 2477 | } |
| 2478 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2479 | /* |
| 2480 | * akpm: core read_super() calls in here with the superblock locked. |
| 2481 | * That deadlocks, because orphan cleanup needs to lock the superblock |
| 2482 | * in numerous places. Here we just pop the lock - it's relatively |
| 2483 | * harmless, because we are now ready to accept write_super() requests, |
| 2484 | * and aviro says that's the only reason for hanging onto the |
| 2485 | * superblock lock. |
| 2486 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2487 | EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; |
| 2488 | ext4_orphan_cleanup(sb, es); |
| 2489 | EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 2490 | if (needs_recovery) { |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 2491 | printk(KERN_INFO "EXT4-fs: recovery complete.\n"); |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 2492 | ext4_mark_recovery_complete(sb, es); |
| 2493 | } |
| 2494 | if (EXT4_SB(sb)->s_journal) { |
| 2495 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) |
| 2496 | descr = " journalled data mode"; |
| 2497 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) |
| 2498 | descr = " ordered data mode"; |
| 2499 | else |
| 2500 | descr = " writeback data mode"; |
| 2501 | } else |
| 2502 | descr = "out journal"; |
| 2503 | |
| 2504 | printk(KERN_INFO "EXT4-fs: mounted filesystem %s with%s\n", |
| 2505 | sb->s_id, descr); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2506 | |
| 2507 | lock_kernel(); |
| 2508 | return 0; |
| 2509 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2510 | cantfind_ext4: |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2511 | if (!silent) |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2512 | printk(KERN_ERR "VFS: Can't find ext4 filesystem on dev %s.\n", |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2513 | sb->s_id); |
| 2514 | goto failed_mount; |
| 2515 | |
| 2516 | failed_mount4: |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 2517 | printk(KERN_ERR "EXT4-fs (device %s): mount failed\n", sb->s_id); |
| 2518 | if (sbi->s_journal) { |
| 2519 | jbd2_journal_destroy(sbi->s_journal); |
| 2520 | sbi->s_journal = NULL; |
| 2521 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2522 | failed_mount3: |
| 2523 | percpu_counter_destroy(&sbi->s_freeblocks_counter); |
| 2524 | percpu_counter_destroy(&sbi->s_freeinodes_counter); |
| 2525 | percpu_counter_destroy(&sbi->s_dirs_counter); |
Aneesh Kumar K.V | 6bc6e63 | 2008-10-10 09:39:00 -0400 | [diff] [blame] | 2526 | percpu_counter_destroy(&sbi->s_dirtyblocks_counter); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2527 | failed_mount2: |
| 2528 | for (i = 0; i < db_count; i++) |
| 2529 | brelse(sbi->s_group_desc[i]); |
| 2530 | kfree(sbi->s_group_desc); |
| 2531 | failed_mount: |
Theodore Ts'o | 240799c | 2008-10-09 23:53:47 -0400 | [diff] [blame] | 2532 | if (sbi->s_proc) { |
| 2533 | remove_proc_entry("inode_readahead_blks", sbi->s_proc); |
Theodore Ts'o | 9f6200b | 2008-09-23 09:18:24 -0400 | [diff] [blame] | 2534 | remove_proc_entry(sb->s_id, ext4_proc_root); |
Theodore Ts'o | 240799c | 2008-10-09 23:53:47 -0400 | [diff] [blame] | 2535 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2536 | #ifdef CONFIG_QUOTA |
| 2537 | for (i = 0; i < MAXQUOTAS; i++) |
| 2538 | kfree(sbi->s_qf_names[i]); |
| 2539 | #endif |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2540 | ext4_blkdev_remove(sbi); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2541 | brelse(bh); |
| 2542 | out_fail: |
| 2543 | sb->s_fs_info = NULL; |
| 2544 | kfree(sbi); |
| 2545 | lock_kernel(); |
David Howells | 1d1fe1e | 2008-02-07 00:15:37 -0800 | [diff] [blame] | 2546 | return ret; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2547 | } |
| 2548 | |
| 2549 | /* |
| 2550 | * Setup any per-fs journal parameters now. We'll do this both on |
| 2551 | * initial mount, once the journal has been initialised but before we've |
| 2552 | * done any recovery; and again on any subsequent remount. |
| 2553 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2554 | 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] | 2555 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2556 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2557 | |
Theodore Ts'o | 3077384 | 2009-01-03 20:27:38 -0500 | [diff] [blame] | 2558 | journal->j_commit_interval = sbi->s_commit_interval; |
| 2559 | journal->j_min_batch_time = sbi->s_min_batch_time; |
| 2560 | journal->j_max_batch_time = sbi->s_max_batch_time; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2561 | |
| 2562 | spin_lock(&journal->j_state_lock); |
| 2563 | if (test_opt(sb, BARRIER)) |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 2564 | journal->j_flags |= JBD2_BARRIER; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2565 | else |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 2566 | journal->j_flags &= ~JBD2_BARRIER; |
Hidehiro Kawai | 5bf5683 | 2008-10-10 22:12:43 -0400 | [diff] [blame] | 2567 | if (test_opt(sb, DATA_ERR_ABORT)) |
| 2568 | journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; |
| 2569 | else |
| 2570 | journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2571 | spin_unlock(&journal->j_state_lock); |
| 2572 | } |
| 2573 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2574 | static journal_t *ext4_get_journal(struct super_block *sb, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2575 | unsigned int journal_inum) |
| 2576 | { |
| 2577 | struct inode *journal_inode; |
| 2578 | journal_t *journal; |
| 2579 | |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 2580 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
| 2581 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2582 | /* First, test for the existence of a valid inode on disk. Bad |
| 2583 | * things happen if we iget() an unused inode, as the subsequent |
| 2584 | * iput() will try to delete it. */ |
| 2585 | |
David Howells | 1d1fe1e | 2008-02-07 00:15:37 -0800 | [diff] [blame] | 2586 | journal_inode = ext4_iget(sb, journal_inum); |
| 2587 | if (IS_ERR(journal_inode)) { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2588 | printk(KERN_ERR "EXT4-fs: no journal found.\n"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2589 | return NULL; |
| 2590 | } |
| 2591 | if (!journal_inode->i_nlink) { |
| 2592 | make_bad_inode(journal_inode); |
| 2593 | iput(journal_inode); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2594 | printk(KERN_ERR "EXT4-fs: journal inode is deleted.\n"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2595 | return NULL; |
| 2596 | } |
| 2597 | |
Theodore Ts'o | e5f8eab8 | 2008-09-08 22:25:04 -0400 | [diff] [blame] | 2598 | jbd_debug(2, "Journal inode found at %p: %lld bytes\n", |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2599 | journal_inode, journal_inode->i_size); |
David Howells | 1d1fe1e | 2008-02-07 00:15:37 -0800 | [diff] [blame] | 2600 | if (!S_ISREG(journal_inode->i_mode)) { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2601 | printk(KERN_ERR "EXT4-fs: invalid journal inode.\n"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2602 | iput(journal_inode); |
| 2603 | return NULL; |
| 2604 | } |
| 2605 | |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 2606 | journal = jbd2_journal_init_inode(journal_inode); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2607 | if (!journal) { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2608 | printk(KERN_ERR "EXT4-fs: Could not load journal inode\n"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2609 | iput(journal_inode); |
| 2610 | return NULL; |
| 2611 | } |
| 2612 | journal->j_private = sb; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2613 | ext4_init_journal_params(sb, journal); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2614 | return journal; |
| 2615 | } |
| 2616 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2617 | static journal_t *ext4_get_dev_journal(struct super_block *sb, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2618 | dev_t j_dev) |
| 2619 | { |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 2620 | struct buffer_head *bh; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2621 | journal_t *journal; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2622 | ext4_fsblk_t start; |
| 2623 | ext4_fsblk_t len; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2624 | int hblock, blocksize; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2625 | ext4_fsblk_t sb_block; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2626 | unsigned long offset; |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 2627 | struct ext4_super_block *es; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2628 | struct block_device *bdev; |
| 2629 | |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 2630 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
| 2631 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2632 | bdev = ext4_blkdev_get(j_dev); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2633 | if (bdev == NULL) |
| 2634 | return NULL; |
| 2635 | |
| 2636 | if (bd_claim(bdev, sb)) { |
| 2637 | printk(KERN_ERR |
Dave Kleikamp | 8c55e20 | 2007-05-24 13:04:54 -0400 | [diff] [blame] | 2638 | "EXT4: failed to claim external journal device.\n"); |
Al Viro | 9a1c354 | 2008-02-22 20:40:24 -0500 | [diff] [blame] | 2639 | blkdev_put(bdev, FMODE_READ|FMODE_WRITE); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2640 | return NULL; |
| 2641 | } |
| 2642 | |
| 2643 | blocksize = sb->s_blocksize; |
| 2644 | hblock = bdev_hardsect_size(bdev); |
| 2645 | if (blocksize < hblock) { |
| 2646 | printk(KERN_ERR |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2647 | "EXT4-fs: blocksize too small for journal device.\n"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2648 | goto out_bdev; |
| 2649 | } |
| 2650 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2651 | sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; |
| 2652 | offset = EXT4_MIN_BLOCK_SIZE % blocksize; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2653 | set_blocksize(bdev, blocksize); |
| 2654 | if (!(bh = __bread(bdev, sb_block, blocksize))) { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2655 | printk(KERN_ERR "EXT4-fs: couldn't read superblock of " |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2656 | "external journal\n"); |
| 2657 | goto out_bdev; |
| 2658 | } |
| 2659 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2660 | es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); |
| 2661 | if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2662 | !(le32_to_cpu(es->s_feature_incompat) & |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2663 | EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { |
| 2664 | printk(KERN_ERR "EXT4-fs: external journal has " |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2665 | "bad superblock\n"); |
| 2666 | brelse(bh); |
| 2667 | goto out_bdev; |
| 2668 | } |
| 2669 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2670 | if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { |
| 2671 | printk(KERN_ERR "EXT4-fs: journal UUID does not match\n"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2672 | brelse(bh); |
| 2673 | goto out_bdev; |
| 2674 | } |
| 2675 | |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 2676 | len = ext4_blocks_count(es); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2677 | start = sb_block + 1; |
| 2678 | brelse(bh); /* we're done with the superblock */ |
| 2679 | |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 2680 | journal = jbd2_journal_init_dev(bdev, sb->s_bdev, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2681 | start, len, blocksize); |
| 2682 | if (!journal) { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2683 | printk(KERN_ERR "EXT4-fs: failed to create device journal\n"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2684 | goto out_bdev; |
| 2685 | } |
| 2686 | journal->j_private = sb; |
| 2687 | ll_rw_block(READ, 1, &journal->j_sb_buffer); |
| 2688 | wait_on_buffer(journal->j_sb_buffer); |
| 2689 | if (!buffer_uptodate(journal->j_sb_buffer)) { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2690 | printk(KERN_ERR "EXT4-fs: I/O error on journal device\n"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2691 | goto out_journal; |
| 2692 | } |
| 2693 | if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2694 | printk(KERN_ERR "EXT4-fs: External journal has more than one " |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2695 | "user (unsupported) - %d\n", |
| 2696 | be32_to_cpu(journal->j_superblock->s_nr_users)); |
| 2697 | goto out_journal; |
| 2698 | } |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2699 | EXT4_SB(sb)->journal_bdev = bdev; |
| 2700 | ext4_init_journal_params(sb, journal); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2701 | return journal; |
| 2702 | out_journal: |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 2703 | jbd2_journal_destroy(journal); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2704 | out_bdev: |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2705 | ext4_blkdev_put(bdev); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2706 | return NULL; |
| 2707 | } |
| 2708 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2709 | static int ext4_load_journal(struct super_block *sb, |
| 2710 | struct ext4_super_block *es, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2711 | unsigned long journal_devnum) |
| 2712 | { |
| 2713 | journal_t *journal; |
| 2714 | unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); |
| 2715 | dev_t journal_dev; |
| 2716 | int err = 0; |
| 2717 | int really_read_only; |
| 2718 | |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 2719 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
| 2720 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2721 | if (journal_devnum && |
| 2722 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2723 | printk(KERN_INFO "EXT4-fs: external journal device major/minor " |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2724 | "numbers have changed\n"); |
| 2725 | journal_dev = new_decode_dev(journal_devnum); |
| 2726 | } else |
| 2727 | journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); |
| 2728 | |
| 2729 | really_read_only = bdev_read_only(sb->s_bdev); |
| 2730 | |
| 2731 | /* |
| 2732 | * Are we loading a blank journal or performing recovery after a |
| 2733 | * crash? For recovery, we need to check in advance whether we |
| 2734 | * can get read-write access to the device. |
| 2735 | */ |
| 2736 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2737 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2738 | if (sb->s_flags & MS_RDONLY) { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2739 | printk(KERN_INFO "EXT4-fs: INFO: recovery " |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2740 | "required on readonly filesystem.\n"); |
| 2741 | if (really_read_only) { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2742 | printk(KERN_ERR "EXT4-fs: write access " |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2743 | "unavailable, cannot proceed.\n"); |
| 2744 | return -EROFS; |
| 2745 | } |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 2746 | printk(KERN_INFO "EXT4-fs: write access will " |
| 2747 | "be enabled during recovery.\n"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2748 | } |
| 2749 | } |
| 2750 | |
| 2751 | if (journal_inum && journal_dev) { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2752 | printk(KERN_ERR "EXT4-fs: filesystem has both journal " |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2753 | "and inode journals!\n"); |
| 2754 | return -EINVAL; |
| 2755 | } |
| 2756 | |
| 2757 | if (journal_inum) { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2758 | if (!(journal = ext4_get_journal(sb, journal_inum))) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2759 | return -EINVAL; |
| 2760 | } else { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2761 | if (!(journal = ext4_get_dev_journal(sb, journal_dev))) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2762 | return -EINVAL; |
| 2763 | } |
| 2764 | |
Theodore Ts'o | 4776004f | 2008-09-08 23:00:52 -0400 | [diff] [blame] | 2765 | if (journal->j_flags & JBD2_BARRIER) |
| 2766 | printk(KERN_INFO "EXT4-fs: barriers enabled\n"); |
| 2767 | else |
| 2768 | printk(KERN_INFO "EXT4-fs: barriers disabled\n"); |
| 2769 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2770 | if (!really_read_only && test_opt(sb, UPDATE_JOURNAL)) { |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 2771 | err = jbd2_journal_update_format(journal); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2772 | if (err) { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2773 | printk(KERN_ERR "EXT4-fs: error updating journal.\n"); |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 2774 | jbd2_journal_destroy(journal); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2775 | return err; |
| 2776 | } |
| 2777 | } |
| 2778 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2779 | if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 2780 | err = jbd2_journal_wipe(journal, !really_read_only); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2781 | if (!err) |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 2782 | err = jbd2_journal_load(journal); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2783 | |
| 2784 | if (err) { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2785 | printk(KERN_ERR "EXT4-fs: error loading journal.\n"); |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 2786 | jbd2_journal_destroy(journal); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2787 | return err; |
| 2788 | } |
| 2789 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2790 | EXT4_SB(sb)->s_journal = journal; |
| 2791 | ext4_clear_journal_err(sb, es); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2792 | |
| 2793 | if (journal_devnum && |
| 2794 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { |
| 2795 | es->s_journal_dev = cpu_to_le32(journal_devnum); |
| 2796 | sb->s_dirt = 1; |
| 2797 | |
| 2798 | /* Make sure we flush the recovery flag to disk. */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2799 | ext4_commit_super(sb, es, 1); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2800 | } |
| 2801 | |
| 2802 | return 0; |
| 2803 | } |
| 2804 | |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 2805 | static int ext4_create_journal(struct super_block *sb, |
| 2806 | struct ext4_super_block *es, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2807 | unsigned int journal_inum) |
| 2808 | { |
| 2809 | journal_t *journal; |
Borislav Petkov | 6c675bd | 2007-07-15 23:41:45 -0700 | [diff] [blame] | 2810 | int err; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2811 | |
| 2812 | if (sb->s_flags & MS_RDONLY) { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2813 | printk(KERN_ERR "EXT4-fs: readonly filesystem when trying to " |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2814 | "create journal.\n"); |
| 2815 | return -EROFS; |
| 2816 | } |
| 2817 | |
Borislav Petkov | 6c675bd | 2007-07-15 23:41:45 -0700 | [diff] [blame] | 2818 | journal = ext4_get_journal(sb, journal_inum); |
| 2819 | if (!journal) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2820 | return -EINVAL; |
| 2821 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2822 | printk(KERN_INFO "EXT4-fs: creating new journal on inode %u\n", |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2823 | journal_inum); |
| 2824 | |
Borislav Petkov | 6c675bd | 2007-07-15 23:41:45 -0700 | [diff] [blame] | 2825 | err = jbd2_journal_create(journal); |
| 2826 | if (err) { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2827 | printk(KERN_ERR "EXT4-fs: error creating journal.\n"); |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 2828 | jbd2_journal_destroy(journal); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2829 | return -EIO; |
| 2830 | } |
| 2831 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2832 | EXT4_SB(sb)->s_journal = journal; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2833 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2834 | ext4_update_dynamic_rev(sb); |
| 2835 | EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
| 2836 | EXT4_SET_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2837 | |
| 2838 | es->s_journal_inum = cpu_to_le32(journal_inum); |
| 2839 | sb->s_dirt = 1; |
| 2840 | |
| 2841 | /* Make sure we flush the recovery flag to disk. */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2842 | ext4_commit_super(sb, es, 1); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2843 | |
| 2844 | return 0; |
| 2845 | } |
| 2846 | |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 2847 | static void ext4_commit_super(struct super_block *sb, |
| 2848 | struct ext4_super_block *es, int sync) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2849 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2850 | struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2851 | |
| 2852 | if (!sbh) |
| 2853 | return; |
Theodore Ts'o | 914258b | 2008-10-06 21:35:40 -0400 | [diff] [blame] | 2854 | if (buffer_write_io_error(sbh)) { |
| 2855 | /* |
| 2856 | * Oh, dear. A previous attempt to write the |
| 2857 | * superblock failed. This could happen because the |
| 2858 | * USB device was yanked out. Or it could happen to |
| 2859 | * be a transient write error and maybe the block will |
| 2860 | * be remapped. Nothing we can do but to retry the |
| 2861 | * write and hope for the best. |
| 2862 | */ |
| 2863 | printk(KERN_ERR "ext4: previous I/O error to " |
| 2864 | "superblock detected for %s.\n", sb->s_id); |
| 2865 | clear_buffer_write_io_error(sbh); |
| 2866 | set_buffer_uptodate(sbh); |
| 2867 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2868 | es->s_wtime = cpu_to_le32(get_seconds()); |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 2869 | ext4_free_blocks_count_set(es, ext4_count_free_blocks(sb)); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2870 | 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] | 2871 | BUFFER_TRACE(sbh, "marking dirty"); |
| 2872 | mark_buffer_dirty(sbh); |
Theodore Ts'o | 914258b | 2008-10-06 21:35:40 -0400 | [diff] [blame] | 2873 | if (sync) { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2874 | sync_dirty_buffer(sbh); |
Theodore Ts'o | 914258b | 2008-10-06 21:35:40 -0400 | [diff] [blame] | 2875 | if (buffer_write_io_error(sbh)) { |
| 2876 | printk(KERN_ERR "ext4: I/O error while writing " |
| 2877 | "superblock for %s.\n", sb->s_id); |
| 2878 | clear_buffer_write_io_error(sbh); |
| 2879 | set_buffer_uptodate(sbh); |
| 2880 | } |
| 2881 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2882 | } |
| 2883 | |
| 2884 | |
| 2885 | /* |
| 2886 | * Have we just finished recovery? If so, and if we are mounting (or |
| 2887 | * remounting) the filesystem readonly, then we will end up with a |
| 2888 | * consistent fs on disk. Record that fact. |
| 2889 | */ |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 2890 | static void ext4_mark_recovery_complete(struct super_block *sb, |
| 2891 | struct ext4_super_block *es) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2892 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2893 | journal_t *journal = EXT4_SB(sb)->s_journal; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2894 | |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 2895 | if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { |
| 2896 | BUG_ON(journal != NULL); |
| 2897 | return; |
| 2898 | } |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 2899 | jbd2_journal_lock_updates(journal); |
Hidehiro Kawai | 7ffe1ea | 2008-10-10 20:29:21 -0400 | [diff] [blame] | 2900 | if (jbd2_journal_flush(journal) < 0) |
| 2901 | goto out; |
| 2902 | |
Jan Kara | 32c3773 | 2007-07-15 23:41:09 -0700 | [diff] [blame] | 2903 | lock_super(sb); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2904 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2905 | sb->s_flags & MS_RDONLY) { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2906 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2907 | sb->s_dirt = 0; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2908 | ext4_commit_super(sb, es, 1); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2909 | } |
Jan Kara | 32c3773 | 2007-07-15 23:41:09 -0700 | [diff] [blame] | 2910 | unlock_super(sb); |
Hidehiro Kawai | 7ffe1ea | 2008-10-10 20:29:21 -0400 | [diff] [blame] | 2911 | |
| 2912 | out: |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 2913 | jbd2_journal_unlock_updates(journal); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2914 | } |
| 2915 | |
| 2916 | /* |
| 2917 | * If we are mounting (or read-write remounting) a filesystem whose journal |
| 2918 | * has recorded an error from a previous lifetime, move that error to the |
| 2919 | * main filesystem now. |
| 2920 | */ |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 2921 | static void ext4_clear_journal_err(struct super_block *sb, |
| 2922 | struct ext4_super_block *es) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2923 | { |
| 2924 | journal_t *journal; |
| 2925 | int j_errno; |
| 2926 | const char *errstr; |
| 2927 | |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 2928 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
| 2929 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2930 | journal = EXT4_SB(sb)->s_journal; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2931 | |
| 2932 | /* |
| 2933 | * 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] | 2934 | * journal by a prior ext4_error() or ext4_abort() |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2935 | */ |
| 2936 | |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 2937 | j_errno = jbd2_journal_errno(journal); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2938 | if (j_errno) { |
| 2939 | char nbuf[16]; |
| 2940 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2941 | errstr = ext4_decode_error(sb, j_errno, nbuf); |
Harvey Harrison | 46e665e | 2008-04-17 10:38:59 -0400 | [diff] [blame] | 2942 | ext4_warning(sb, __func__, "Filesystem error recorded " |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2943 | "from previous mount: %s", errstr); |
Harvey Harrison | 46e665e | 2008-04-17 10:38:59 -0400 | [diff] [blame] | 2944 | ext4_warning(sb, __func__, "Marking fs in need of " |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2945 | "filesystem check."); |
| 2946 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2947 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; |
| 2948 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 2949 | ext4_commit_super(sb, es, 1); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2950 | |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 2951 | jbd2_journal_clear_err(journal); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2952 | } |
| 2953 | } |
| 2954 | |
| 2955 | /* |
| 2956 | * Force the running and committing transactions to commit, |
| 2957 | * and wait on the commit. |
| 2958 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2959 | int ext4_force_commit(struct super_block *sb) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2960 | { |
| 2961 | journal_t *journal; |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 2962 | int ret = 0; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2963 | |
| 2964 | if (sb->s_flags & MS_RDONLY) |
| 2965 | return 0; |
| 2966 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2967 | journal = EXT4_SB(sb)->s_journal; |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 2968 | if (journal) { |
| 2969 | sb->s_dirt = 0; |
| 2970 | ret = ext4_journal_force_commit(journal); |
| 2971 | } |
| 2972 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2973 | return ret; |
| 2974 | } |
| 2975 | |
| 2976 | /* |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2977 | * Ext4 always journals updates to the superblock itself, so we don't |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2978 | * have to propagate any other updates to the superblock on disk at this |
Theodore Ts'o | 14ce0cb | 2008-11-03 18:10:55 -0500 | [diff] [blame] | 2979 | * point. (We can probably nuke this function altogether, and remove |
| 2980 | * any mention to sb->s_dirt in all of fs/ext4; eventual cleanup...) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2981 | */ |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 2982 | static void ext4_write_super(struct super_block *sb) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2983 | { |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 2984 | if (EXT4_SB(sb)->s_journal) { |
| 2985 | if (mutex_trylock(&sb->s_lock) != 0) |
| 2986 | BUG(); |
| 2987 | sb->s_dirt = 0; |
| 2988 | } else { |
| 2989 | ext4_commit_super(sb, EXT4_SB(sb)->s_es, 1); |
| 2990 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2991 | } |
| 2992 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2993 | static int ext4_sync_fs(struct super_block *sb, int wait) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2994 | { |
Theodore Ts'o | 14ce0cb | 2008-11-03 18:10:55 -0500 | [diff] [blame] | 2995 | int ret = 0; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2996 | |
Theodore Ts'o | ede86cc | 2008-10-05 20:50:06 -0400 | [diff] [blame] | 2997 | trace_mark(ext4_sync_fs, "dev %s wait %d", sb->s_id, wait); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 2998 | sb->s_dirt = 0; |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 2999 | if (EXT4_SB(sb)->s_journal) { |
| 3000 | if (wait) |
| 3001 | ret = ext4_force_commit(sb); |
| 3002 | else |
| 3003 | jbd2_journal_start_commit(EXT4_SB(sb)->s_journal, NULL); |
| 3004 | } else { |
| 3005 | ext4_commit_super(sb, EXT4_SB(sb)->s_es, wait); |
| 3006 | } |
Theodore Ts'o | 14ce0cb | 2008-11-03 18:10:55 -0500 | [diff] [blame] | 3007 | return ret; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3008 | } |
| 3009 | |
| 3010 | /* |
| 3011 | * LVM calls this function before a (read-only) snapshot is created. This |
| 3012 | * gives us a chance to flush the journal completely and mark the fs clean. |
| 3013 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3014 | static void ext4_write_super_lockfs(struct super_block *sb) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3015 | { |
| 3016 | sb->s_dirt = 0; |
| 3017 | |
| 3018 | if (!(sb->s_flags & MS_RDONLY)) { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3019 | journal_t *journal = EXT4_SB(sb)->s_journal; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3020 | |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 3021 | if (journal) { |
| 3022 | /* Now we set up the journal barrier. */ |
| 3023 | jbd2_journal_lock_updates(journal); |
Hidehiro Kawai | 7ffe1ea | 2008-10-10 20:29:21 -0400 | [diff] [blame] | 3024 | |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 3025 | /* |
| 3026 | * We don't want to clear needs_recovery flag when we |
| 3027 | * failed to flush the journal. |
| 3028 | */ |
| 3029 | if (jbd2_journal_flush(journal) < 0) |
| 3030 | return; |
| 3031 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3032 | |
| 3033 | /* Journal blocked and flushed, clear needs_recovery flag. */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3034 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
| 3035 | ext4_commit_super(sb, EXT4_SB(sb)->s_es, 1); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3036 | } |
| 3037 | } |
| 3038 | |
| 3039 | /* |
| 3040 | * Called by LVM after the snapshot is done. We need to reset the RECOVER |
| 3041 | * flag here, even though the filesystem is not technically dirty yet. |
| 3042 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3043 | static void ext4_unlockfs(struct super_block *sb) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3044 | { |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 3045 | if (EXT4_SB(sb)->s_journal && !(sb->s_flags & MS_RDONLY)) { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3046 | lock_super(sb); |
| 3047 | /* Reser the needs_recovery flag before the fs is unlocked. */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3048 | EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
| 3049 | ext4_commit_super(sb, EXT4_SB(sb)->s_es, 1); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3050 | unlock_super(sb); |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 3051 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3052 | } |
| 3053 | } |
| 3054 | |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 3055 | static int ext4_remount(struct super_block *sb, int *flags, char *data) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3056 | { |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 3057 | struct ext4_super_block *es; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3058 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
| 3059 | ext4_fsblk_t n_blocks_count = 0; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3060 | unsigned long old_sb_flags; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3061 | struct ext4_mount_options old_opts; |
Theodore Ts'o | 8a26646 | 2008-07-26 14:34:21 -0400 | [diff] [blame] | 3062 | ext4_group_t g; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3063 | int err; |
| 3064 | #ifdef CONFIG_QUOTA |
| 3065 | int i; |
| 3066 | #endif |
| 3067 | |
| 3068 | /* Store the original options */ |
| 3069 | old_sb_flags = sb->s_flags; |
| 3070 | old_opts.s_mount_opt = sbi->s_mount_opt; |
| 3071 | old_opts.s_resuid = sbi->s_resuid; |
| 3072 | old_opts.s_resgid = sbi->s_resgid; |
| 3073 | old_opts.s_commit_interval = sbi->s_commit_interval; |
Theodore Ts'o | 3077384 | 2009-01-03 20:27:38 -0500 | [diff] [blame] | 3074 | old_opts.s_min_batch_time = sbi->s_min_batch_time; |
| 3075 | old_opts.s_max_batch_time = sbi->s_max_batch_time; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3076 | #ifdef CONFIG_QUOTA |
| 3077 | old_opts.s_jquota_fmt = sbi->s_jquota_fmt; |
| 3078 | for (i = 0; i < MAXQUOTAS; i++) |
| 3079 | old_opts.s_qf_names[i] = sbi->s_qf_names[i]; |
| 3080 | #endif |
| 3081 | |
| 3082 | /* |
| 3083 | * Allow the "check" option to be passed as a remount option. |
| 3084 | */ |
| 3085 | if (!parse_options(data, sb, NULL, NULL, &n_blocks_count, 1)) { |
| 3086 | err = -EINVAL; |
| 3087 | goto restore_opts; |
| 3088 | } |
| 3089 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3090 | if (sbi->s_mount_opt & EXT4_MOUNT_ABORT) |
Harvey Harrison | 46e665e | 2008-04-17 10:38:59 -0400 | [diff] [blame] | 3091 | ext4_abort(sb, __func__, "Abort forced by user"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3092 | |
| 3093 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3094 | ((sbi->s_mount_opt & EXT4_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3095 | |
| 3096 | es = sbi->s_es; |
| 3097 | |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 3098 | if (sbi->s_journal) |
| 3099 | ext4_init_journal_params(sb, sbi->s_journal); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3100 | |
| 3101 | if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY) || |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 3102 | n_blocks_count > ext4_blocks_count(es)) { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3103 | if (sbi->s_mount_opt & EXT4_MOUNT_ABORT) { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3104 | err = -EROFS; |
| 3105 | goto restore_opts; |
| 3106 | } |
| 3107 | |
| 3108 | if (*flags & MS_RDONLY) { |
| 3109 | /* |
| 3110 | * First of all, the unconditional stuff we have to do |
| 3111 | * to disable replay of the journal when we next remount |
| 3112 | */ |
| 3113 | sb->s_flags |= MS_RDONLY; |
| 3114 | |
| 3115 | /* |
| 3116 | * OK, test if we are remounting a valid rw partition |
| 3117 | * readonly, and if so set the rdonly flag and then |
| 3118 | * mark the partition as valid again. |
| 3119 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3120 | if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && |
| 3121 | (sbi->s_mount_state & EXT4_VALID_FS)) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3122 | es->s_state = cpu_to_le16(sbi->s_mount_state); |
| 3123 | |
Jan Kara | 32c3773 | 2007-07-15 23:41:09 -0700 | [diff] [blame] | 3124 | /* |
| 3125 | * We have to unlock super so that we can wait for |
| 3126 | * transactions. |
| 3127 | */ |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 3128 | if (sbi->s_journal) { |
| 3129 | unlock_super(sb); |
| 3130 | ext4_mark_recovery_complete(sb, es); |
| 3131 | lock_super(sb); |
| 3132 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3133 | } else { |
| 3134 | __le32 ret; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3135 | if ((ret = EXT4_HAS_RO_COMPAT_FEATURE(sb, |
| 3136 | ~EXT4_FEATURE_RO_COMPAT_SUPP))) { |
| 3137 | printk(KERN_WARNING "EXT4-fs: %s: couldn't " |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3138 | "remount RDWR because of unsupported " |
| 3139 | "optional features (%x).\n", |
| 3140 | sb->s_id, le32_to_cpu(ret)); |
| 3141 | err = -EROFS; |
| 3142 | goto restore_opts; |
| 3143 | } |
Eric Sandeen | ead6596 | 2007-02-10 01:46:08 -0800 | [diff] [blame] | 3144 | |
| 3145 | /* |
Theodore Ts'o | 8a26646 | 2008-07-26 14:34:21 -0400 | [diff] [blame] | 3146 | * Make sure the group descriptor checksums |
| 3147 | * are sane. If they aren't, refuse to |
| 3148 | * remount r/w. |
| 3149 | */ |
| 3150 | for (g = 0; g < sbi->s_groups_count; g++) { |
| 3151 | struct ext4_group_desc *gdp = |
| 3152 | ext4_get_group_desc(sb, g, NULL); |
| 3153 | |
| 3154 | if (!ext4_group_desc_csum_verify(sbi, g, gdp)) { |
| 3155 | printk(KERN_ERR |
| 3156 | "EXT4-fs: ext4_remount: " |
Theodore Ts'o | a9df9a4 | 2009-01-05 22:18:16 -0500 | [diff] [blame^] | 3157 | "Checksum for group %u failed (%u!=%u)\n", |
Theodore Ts'o | 8a26646 | 2008-07-26 14:34:21 -0400 | [diff] [blame] | 3158 | g, le16_to_cpu(ext4_group_desc_csum(sbi, g, gdp)), |
| 3159 | le16_to_cpu(gdp->bg_checksum)); |
| 3160 | err = -EINVAL; |
| 3161 | goto restore_opts; |
| 3162 | } |
| 3163 | } |
| 3164 | |
| 3165 | /* |
Eric Sandeen | ead6596 | 2007-02-10 01:46:08 -0800 | [diff] [blame] | 3166 | * If we have an unprocessed orphan list hanging |
| 3167 | * around from a previously readonly bdev mount, |
| 3168 | * require a full umount/remount for now. |
| 3169 | */ |
| 3170 | if (es->s_last_orphan) { |
| 3171 | printk(KERN_WARNING "EXT4-fs: %s: couldn't " |
| 3172 | "remount RDWR because of unprocessed " |
| 3173 | "orphan inode list. Please " |
| 3174 | "umount/remount instead.\n", |
| 3175 | sb->s_id); |
| 3176 | err = -EINVAL; |
| 3177 | goto restore_opts; |
| 3178 | } |
| 3179 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3180 | /* |
| 3181 | * Mounting a RDONLY partition read-write, so reread |
| 3182 | * and store the current valid flag. (It may have |
| 3183 | * been changed by e2fsck since we originally mounted |
| 3184 | * the partition.) |
| 3185 | */ |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 3186 | if (sbi->s_journal) |
| 3187 | ext4_clear_journal_err(sb, es); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3188 | sbi->s_mount_state = le16_to_cpu(es->s_state); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3189 | if ((err = ext4_group_extend(sb, es, n_blocks_count))) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3190 | goto restore_opts; |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 3191 | if (!ext4_setup_super(sb, es, 0)) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3192 | sb->s_flags &= ~MS_RDONLY; |
| 3193 | } |
| 3194 | } |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 3195 | if (sbi->s_journal == NULL) |
| 3196 | ext4_commit_super(sb, es, 1); |
| 3197 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3198 | #ifdef CONFIG_QUOTA |
| 3199 | /* Release old quota file names */ |
| 3200 | for (i = 0; i < MAXQUOTAS; i++) |
| 3201 | if (old_opts.s_qf_names[i] && |
| 3202 | old_opts.s_qf_names[i] != sbi->s_qf_names[i]) |
| 3203 | kfree(old_opts.s_qf_names[i]); |
| 3204 | #endif |
| 3205 | return 0; |
| 3206 | restore_opts: |
| 3207 | sb->s_flags = old_sb_flags; |
| 3208 | sbi->s_mount_opt = old_opts.s_mount_opt; |
| 3209 | sbi->s_resuid = old_opts.s_resuid; |
| 3210 | sbi->s_resgid = old_opts.s_resgid; |
| 3211 | sbi->s_commit_interval = old_opts.s_commit_interval; |
Theodore Ts'o | 3077384 | 2009-01-03 20:27:38 -0500 | [diff] [blame] | 3212 | sbi->s_min_batch_time = old_opts.s_min_batch_time; |
| 3213 | sbi->s_max_batch_time = old_opts.s_max_batch_time; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3214 | #ifdef CONFIG_QUOTA |
| 3215 | sbi->s_jquota_fmt = old_opts.s_jquota_fmt; |
| 3216 | for (i = 0; i < MAXQUOTAS; i++) { |
| 3217 | if (sbi->s_qf_names[i] && |
| 3218 | old_opts.s_qf_names[i] != sbi->s_qf_names[i]) |
| 3219 | kfree(sbi->s_qf_names[i]); |
| 3220 | sbi->s_qf_names[i] = old_opts.s_qf_names[i]; |
| 3221 | } |
| 3222 | #endif |
| 3223 | return err; |
| 3224 | } |
| 3225 | |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 3226 | static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3227 | { |
| 3228 | struct super_block *sb = dentry->d_sb; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3229 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
| 3230 | struct ext4_super_block *es = sbi->s_es; |
Pekka Enberg | 960cc39 | 2006-12-06 20:35:29 -0800 | [diff] [blame] | 3231 | u64 fsid; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3232 | |
Badari Pulavarty | 5e70030 | 2007-07-15 23:42:00 -0700 | [diff] [blame] | 3233 | if (test_opt(sb, MINIX_DF)) { |
| 3234 | sbi->s_overhead_last = 0; |
Aneesh Kumar K.V | 6bc9fef | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 3235 | } else if (sbi->s_blocks_last != ext4_blocks_count(es)) { |
Avantika Mathur | fd2d429 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 3236 | ext4_group_t ngroups = sbi->s_groups_count, i; |
Badari Pulavarty | 5e70030 | 2007-07-15 23:42:00 -0700 | [diff] [blame] | 3237 | ext4_fsblk_t overhead = 0; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3238 | smp_rmb(); |
| 3239 | |
| 3240 | /* |
Badari Pulavarty | 5e70030 | 2007-07-15 23:42:00 -0700 | [diff] [blame] | 3241 | * Compute the overhead (FS structures). This is constant |
| 3242 | * for a given filesystem unless the number of block groups |
| 3243 | * changes so we cache the previous value until it does. |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3244 | */ |
| 3245 | |
| 3246 | /* |
| 3247 | * All of the blocks before first_data_block are |
| 3248 | * overhead |
| 3249 | */ |
| 3250 | overhead = le32_to_cpu(es->s_first_data_block); |
| 3251 | |
| 3252 | /* |
| 3253 | * Add the overhead attributed to the superblock and |
| 3254 | * block group descriptors. If the sparse superblocks |
| 3255 | * feature is turned on, then not all groups have this. |
| 3256 | */ |
| 3257 | for (i = 0; i < ngroups; i++) { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3258 | overhead += ext4_bg_has_super(sb, i) + |
| 3259 | ext4_bg_num_gdb(sb, i); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3260 | cond_resched(); |
| 3261 | } |
| 3262 | |
| 3263 | /* |
| 3264 | * Every block group has an inode bitmap, a block |
| 3265 | * bitmap, and an inode table. |
| 3266 | */ |
Badari Pulavarty | 5e70030 | 2007-07-15 23:42:00 -0700 | [diff] [blame] | 3267 | overhead += ngroups * (2 + sbi->s_itb_per_group); |
| 3268 | sbi->s_overhead_last = overhead; |
| 3269 | smp_wmb(); |
Aneesh Kumar K.V | 6bc9fef | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 3270 | sbi->s_blocks_last = ext4_blocks_count(es); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3271 | } |
| 3272 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3273 | buf->f_type = EXT4_SUPER_MAGIC; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3274 | buf->f_bsize = sb->s_blocksize; |
Badari Pulavarty | 5e70030 | 2007-07-15 23:42:00 -0700 | [diff] [blame] | 3275 | 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] | 3276 | buf->f_bfree = percpu_counter_sum_positive(&sbi->s_freeblocks_counter) - |
| 3277 | percpu_counter_sum_positive(&sbi->s_dirtyblocks_counter); |
Aneesh Kumar K.V | 308ba3e | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 3278 | ext4_free_blocks_count_set(es, buf->f_bfree); |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 3279 | buf->f_bavail = buf->f_bfree - ext4_r_blocks_count(es); |
| 3280 | if (buf->f_bfree < ext4_r_blocks_count(es)) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3281 | buf->f_bavail = 0; |
| 3282 | buf->f_files = le32_to_cpu(es->s_inodes_count); |
Peter Zijlstra | 52d9f3b | 2007-10-16 23:25:44 -0700 | [diff] [blame] | 3283 | buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); |
Badari Pulavarty | 5e70030 | 2007-07-15 23:42:00 -0700 | [diff] [blame] | 3284 | es->s_free_inodes_count = cpu_to_le32(buf->f_ffree); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3285 | buf->f_namelen = EXT4_NAME_LEN; |
Pekka Enberg | 960cc39 | 2006-12-06 20:35:29 -0800 | [diff] [blame] | 3286 | fsid = le64_to_cpup((void *)es->s_uuid) ^ |
| 3287 | le64_to_cpup((void *)es->s_uuid + sizeof(u64)); |
| 3288 | buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; |
| 3289 | buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3290 | return 0; |
| 3291 | } |
| 3292 | |
| 3293 | /* Helper function for writing quotas on sync - we need to start transaction before quota file |
| 3294 | * is locked for write. Otherwise the are possible deadlocks: |
| 3295 | * Process 1 Process 2 |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3296 | * ext4_create() quota_sync() |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 3297 | * jbd2_journal_start() write_dquot() |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3298 | * DQUOT_INIT() down(dqio_mutex) |
Mingming Cao | dab291a | 2006-10-11 01:21:01 -0700 | [diff] [blame] | 3299 | * down(dqio_mutex) jbd2_journal_start() |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3300 | * |
| 3301 | */ |
| 3302 | |
| 3303 | #ifdef CONFIG_QUOTA |
| 3304 | |
| 3305 | static inline struct inode *dquot_to_inode(struct dquot *dquot) |
| 3306 | { |
| 3307 | return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type]; |
| 3308 | } |
| 3309 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3310 | static int ext4_dquot_initialize(struct inode *inode, int type) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3311 | { |
| 3312 | handle_t *handle; |
| 3313 | int ret, err; |
| 3314 | |
| 3315 | /* We may create quota structure so we need to reserve enough blocks */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3316 | handle = ext4_journal_start(inode, 2*EXT4_QUOTA_INIT_BLOCKS(inode->i_sb)); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3317 | if (IS_ERR(handle)) |
| 3318 | return PTR_ERR(handle); |
| 3319 | ret = dquot_initialize(inode, type); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3320 | err = ext4_journal_stop(handle); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3321 | if (!ret) |
| 3322 | ret = err; |
| 3323 | return ret; |
| 3324 | } |
| 3325 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3326 | static int ext4_dquot_drop(struct inode *inode) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3327 | { |
| 3328 | handle_t *handle; |
| 3329 | int ret, err; |
| 3330 | |
| 3331 | /* We may delete quota structure so we need to reserve enough blocks */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3332 | handle = ext4_journal_start(inode, 2*EXT4_QUOTA_DEL_BLOCKS(inode->i_sb)); |
Jan Kara | 2887df1 | 2008-04-29 22:02:07 -0400 | [diff] [blame] | 3333 | if (IS_ERR(handle)) { |
| 3334 | /* |
| 3335 | * We call dquot_drop() anyway to at least release references |
| 3336 | * to quota structures so that umount does not hang. |
| 3337 | */ |
| 3338 | dquot_drop(inode); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3339 | return PTR_ERR(handle); |
Jan Kara | 2887df1 | 2008-04-29 22:02:07 -0400 | [diff] [blame] | 3340 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3341 | ret = dquot_drop(inode); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3342 | err = ext4_journal_stop(handle); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3343 | if (!ret) |
| 3344 | ret = err; |
| 3345 | return ret; |
| 3346 | } |
| 3347 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3348 | static int ext4_write_dquot(struct dquot *dquot) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3349 | { |
| 3350 | int ret, err; |
| 3351 | handle_t *handle; |
| 3352 | struct inode *inode; |
| 3353 | |
| 3354 | inode = dquot_to_inode(dquot); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3355 | handle = ext4_journal_start(inode, |
| 3356 | EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3357 | if (IS_ERR(handle)) |
| 3358 | return PTR_ERR(handle); |
| 3359 | ret = dquot_commit(dquot); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3360 | err = ext4_journal_stop(handle); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3361 | if (!ret) |
| 3362 | ret = err; |
| 3363 | return ret; |
| 3364 | } |
| 3365 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3366 | static int ext4_acquire_dquot(struct dquot *dquot) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3367 | { |
| 3368 | int ret, err; |
| 3369 | handle_t *handle; |
| 3370 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3371 | handle = ext4_journal_start(dquot_to_inode(dquot), |
| 3372 | EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3373 | if (IS_ERR(handle)) |
| 3374 | return PTR_ERR(handle); |
| 3375 | ret = dquot_acquire(dquot); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3376 | err = ext4_journal_stop(handle); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3377 | if (!ret) |
| 3378 | ret = err; |
| 3379 | return ret; |
| 3380 | } |
| 3381 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3382 | static int ext4_release_dquot(struct dquot *dquot) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3383 | { |
| 3384 | int ret, err; |
| 3385 | handle_t *handle; |
| 3386 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3387 | handle = ext4_journal_start(dquot_to_inode(dquot), |
| 3388 | EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); |
Jan Kara | 9c3013e | 2007-09-11 15:23:29 -0700 | [diff] [blame] | 3389 | if (IS_ERR(handle)) { |
| 3390 | /* Release dquot anyway to avoid endless cycle in dqput() */ |
| 3391 | dquot_release(dquot); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3392 | return PTR_ERR(handle); |
Jan Kara | 9c3013e | 2007-09-11 15:23:29 -0700 | [diff] [blame] | 3393 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3394 | ret = dquot_release(dquot); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3395 | err = ext4_journal_stop(handle); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3396 | if (!ret) |
| 3397 | ret = err; |
| 3398 | return ret; |
| 3399 | } |
| 3400 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3401 | static int ext4_mark_dquot_dirty(struct dquot *dquot) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3402 | { |
Jan Kara | 2c8be6b | 2008-05-13 21:27:55 -0400 | [diff] [blame] | 3403 | /* Are we journaling quotas? */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3404 | if (EXT4_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || |
| 3405 | EXT4_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3406 | dquot_mark_dquot_dirty(dquot); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3407 | return ext4_write_dquot(dquot); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3408 | } else { |
| 3409 | return dquot_mark_dquot_dirty(dquot); |
| 3410 | } |
| 3411 | } |
| 3412 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3413 | static int ext4_write_info(struct super_block *sb, int type) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3414 | { |
| 3415 | int ret, err; |
| 3416 | handle_t *handle; |
| 3417 | |
| 3418 | /* Data block + inode block */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3419 | handle = ext4_journal_start(sb->s_root->d_inode, 2); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3420 | if (IS_ERR(handle)) |
| 3421 | return PTR_ERR(handle); |
| 3422 | ret = dquot_commit_info(sb, type); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3423 | err = ext4_journal_stop(handle); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3424 | if (!ret) |
| 3425 | ret = err; |
| 3426 | return ret; |
| 3427 | } |
| 3428 | |
| 3429 | /* |
| 3430 | * Turn on quotas during mount time - we need to find |
| 3431 | * the quota file and such... |
| 3432 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3433 | static int ext4_quota_on_mount(struct super_block *sb, int type) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3434 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3435 | return vfs_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], |
| 3436 | EXT4_SB(sb)->s_jquota_fmt, type); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3437 | } |
| 3438 | |
| 3439 | /* |
| 3440 | * Standard function to be called on quota_on |
| 3441 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3442 | static int ext4_quota_on(struct super_block *sb, int type, int format_id, |
Al Viro | 8264613 | 2008-08-02 00:57:06 -0400 | [diff] [blame] | 3443 | char *name, int remount) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3444 | { |
| 3445 | int err; |
Al Viro | 8264613 | 2008-08-02 00:57:06 -0400 | [diff] [blame] | 3446 | struct path path; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3447 | |
| 3448 | if (!test_opt(sb, QUOTA)) |
| 3449 | return -EINVAL; |
Al Viro | 8264613 | 2008-08-02 00:57:06 -0400 | [diff] [blame] | 3450 | /* When remounting, no checks are needed and in fact, name is NULL */ |
Jan Kara | 0623543 | 2008-05-13 19:11:51 -0400 | [diff] [blame] | 3451 | if (remount) |
Al Viro | 8264613 | 2008-08-02 00:57:06 -0400 | [diff] [blame] | 3452 | return vfs_quota_on(sb, type, format_id, name, remount); |
Jan Kara | 0623543 | 2008-05-13 19:11:51 -0400 | [diff] [blame] | 3453 | |
Al Viro | 8264613 | 2008-08-02 00:57:06 -0400 | [diff] [blame] | 3454 | err = kern_path(name, LOOKUP_FOLLOW, &path); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3455 | if (err) |
| 3456 | return err; |
Jan Kara | 0623543 | 2008-05-13 19:11:51 -0400 | [diff] [blame] | 3457 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3458 | /* Quotafile not on the same filesystem? */ |
Al Viro | 8264613 | 2008-08-02 00:57:06 -0400 | [diff] [blame] | 3459 | if (path.mnt->mnt_sb != sb) { |
| 3460 | path_put(&path); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3461 | return -EXDEV; |
| 3462 | } |
Jan Kara | 0623543 | 2008-05-13 19:11:51 -0400 | [diff] [blame] | 3463 | /* Journaling quota? */ |
| 3464 | if (EXT4_SB(sb)->s_qf_names[type]) { |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 3465 | /* Quotafile not in fs root? */ |
Al Viro | 8264613 | 2008-08-02 00:57:06 -0400 | [diff] [blame] | 3466 | if (path.dentry->d_parent != sb->s_root) |
Jan Kara | 0623543 | 2008-05-13 19:11:51 -0400 | [diff] [blame] | 3467 | printk(KERN_WARNING |
| 3468 | "EXT4-fs: Quota file not on filesystem root. " |
| 3469 | "Journaled quota will not work.\n"); |
Theodore Ts'o | 2b2d6d0 | 2008-07-26 16:15:44 -0400 | [diff] [blame] | 3470 | } |
Jan Kara | 0623543 | 2008-05-13 19:11:51 -0400 | [diff] [blame] | 3471 | |
| 3472 | /* |
| 3473 | * When we journal data on quota file, we have to flush journal to see |
| 3474 | * all updates to the file when we bypass pagecache... |
| 3475 | */ |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 3476 | if (EXT4_SB(sb)->s_journal && |
| 3477 | ext4_should_journal_data(path.dentry->d_inode)) { |
Jan Kara | 0623543 | 2008-05-13 19:11:51 -0400 | [diff] [blame] | 3478 | /* |
| 3479 | * We don't need to lock updates but journal_flush() could |
| 3480 | * otherwise be livelocked... |
| 3481 | */ |
| 3482 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); |
Hidehiro Kawai | 7ffe1ea | 2008-10-10 20:29:21 -0400 | [diff] [blame] | 3483 | err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); |
Jan Kara | 0623543 | 2008-05-13 19:11:51 -0400 | [diff] [blame] | 3484 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); |
Hidehiro Kawai | 7ffe1ea | 2008-10-10 20:29:21 -0400 | [diff] [blame] | 3485 | if (err) { |
Al Viro | 8264613 | 2008-08-02 00:57:06 -0400 | [diff] [blame] | 3486 | path_put(&path); |
Hidehiro Kawai | 7ffe1ea | 2008-10-10 20:29:21 -0400 | [diff] [blame] | 3487 | return err; |
| 3488 | } |
Jan Kara | 0623543 | 2008-05-13 19:11:51 -0400 | [diff] [blame] | 3489 | } |
| 3490 | |
Al Viro | 8264613 | 2008-08-02 00:57:06 -0400 | [diff] [blame] | 3491 | err = vfs_quota_on_path(sb, type, format_id, &path); |
| 3492 | path_put(&path); |
Al Viro | 77e69da | 2008-08-01 04:29:18 -0400 | [diff] [blame] | 3493 | return err; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3494 | } |
| 3495 | |
| 3496 | /* Read data from quotafile - avoid pagecache and such because we cannot afford |
| 3497 | * acquiring the locks... As quota files are never truncated and quota code |
| 3498 | * itself serializes the operations (and noone else should touch the files) |
| 3499 | * we don't have to be afraid of races */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3500 | 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] | 3501 | size_t len, loff_t off) |
| 3502 | { |
| 3503 | struct inode *inode = sb_dqopt(sb)->files[type]; |
Aneesh Kumar K.V | 725d26d | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 3504 | ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3505 | int err = 0; |
| 3506 | int offset = off & (sb->s_blocksize - 1); |
| 3507 | int tocopy; |
| 3508 | size_t toread; |
| 3509 | struct buffer_head *bh; |
| 3510 | loff_t i_size = i_size_read(inode); |
| 3511 | |
| 3512 | if (off > i_size) |
| 3513 | return 0; |
| 3514 | if (off+len > i_size) |
| 3515 | len = i_size-off; |
| 3516 | toread = len; |
| 3517 | while (toread > 0) { |
| 3518 | tocopy = sb->s_blocksize - offset < toread ? |
| 3519 | sb->s_blocksize - offset : toread; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3520 | bh = ext4_bread(NULL, inode, blk, 0, &err); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3521 | if (err) |
| 3522 | return err; |
| 3523 | if (!bh) /* A hole? */ |
| 3524 | memset(data, 0, tocopy); |
| 3525 | else |
| 3526 | memcpy(data, bh->b_data+offset, tocopy); |
| 3527 | brelse(bh); |
| 3528 | offset = 0; |
| 3529 | toread -= tocopy; |
| 3530 | data += tocopy; |
| 3531 | blk++; |
| 3532 | } |
| 3533 | return len; |
| 3534 | } |
| 3535 | |
| 3536 | /* Write to quotafile (we know the transaction is already started and has |
| 3537 | * enough credits) */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3538 | static ssize_t ext4_quota_write(struct super_block *sb, int type, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3539 | const char *data, size_t len, loff_t off) |
| 3540 | { |
| 3541 | struct inode *inode = sb_dqopt(sb)->files[type]; |
Aneesh Kumar K.V | 725d26d | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 3542 | ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3543 | int err = 0; |
| 3544 | int offset = off & (sb->s_blocksize - 1); |
| 3545 | int tocopy; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3546 | int journal_quota = EXT4_SB(sb)->s_qf_names[type] != NULL; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3547 | size_t towrite = len; |
| 3548 | struct buffer_head *bh; |
| 3549 | handle_t *handle = journal_current_handle(); |
| 3550 | |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 3551 | if (EXT4_SB(sb)->s_journal && !handle) { |
Theodore Ts'o | e5f8eab8 | 2008-09-08 22:25:04 -0400 | [diff] [blame] | 3552 | printk(KERN_WARNING "EXT4-fs: Quota write (off=%llu, len=%llu)" |
Jan Kara | 9c3013e | 2007-09-11 15:23:29 -0700 | [diff] [blame] | 3553 | " cancelled because transaction is not started.\n", |
| 3554 | (unsigned long long)off, (unsigned long long)len); |
| 3555 | return -EIO; |
| 3556 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3557 | mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA); |
| 3558 | while (towrite > 0) { |
| 3559 | tocopy = sb->s_blocksize - offset < towrite ? |
| 3560 | sb->s_blocksize - offset : towrite; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3561 | bh = ext4_bread(handle, inode, blk, 1, &err); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3562 | if (!bh) |
| 3563 | goto out; |
| 3564 | if (journal_quota) { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3565 | err = ext4_journal_get_write_access(handle, bh); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3566 | if (err) { |
| 3567 | brelse(bh); |
| 3568 | goto out; |
| 3569 | } |
| 3570 | } |
| 3571 | lock_buffer(bh); |
| 3572 | memcpy(bh->b_data+offset, data, tocopy); |
| 3573 | flush_dcache_page(bh->b_page); |
| 3574 | unlock_buffer(bh); |
| 3575 | if (journal_quota) |
Frank Mayhar | 0390131 | 2009-01-07 00:06:22 -0500 | [diff] [blame] | 3576 | err = ext4_handle_dirty_metadata(handle, NULL, bh); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3577 | else { |
| 3578 | /* Always do at least ordered writes for quotas */ |
Jan Kara | 678aaf4 | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 3579 | err = ext4_jbd2_file_inode(handle, inode); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3580 | mark_buffer_dirty(bh); |
| 3581 | } |
| 3582 | brelse(bh); |
| 3583 | if (err) |
| 3584 | goto out; |
| 3585 | offset = 0; |
| 3586 | towrite -= tocopy; |
| 3587 | data += tocopy; |
| 3588 | blk++; |
| 3589 | } |
| 3590 | out: |
Jan Kara | 4d04e4f | 2008-07-04 09:59:34 -0700 | [diff] [blame] | 3591 | if (len == towrite) { |
| 3592 | mutex_unlock(&inode->i_mutex); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3593 | return err; |
Jan Kara | 4d04e4f | 2008-07-04 09:59:34 -0700 | [diff] [blame] | 3594 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3595 | if (inode->i_size < off+len-towrite) { |
| 3596 | i_size_write(inode, off+len-towrite); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3597 | EXT4_I(inode)->i_disksize = inode->i_size; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3598 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3599 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3600 | ext4_mark_inode_dirty(handle, inode); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3601 | mutex_unlock(&inode->i_mutex); |
| 3602 | return len - towrite; |
| 3603 | } |
| 3604 | |
| 3605 | #endif |
| 3606 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3607 | static int ext4_get_sb(struct file_system_type *fs_type, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3608 | int flags, const char *dev_name, void *data, struct vfsmount *mnt) |
| 3609 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3610 | 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] | 3611 | } |
| 3612 | |
Theodore Ts'o | 5e8814f | 2008-09-23 18:07:35 -0400 | [diff] [blame] | 3613 | #ifdef CONFIG_PROC_FS |
| 3614 | static int ext4_ui_proc_show(struct seq_file *m, void *v) |
| 3615 | { |
| 3616 | unsigned int *p = m->private; |
| 3617 | |
| 3618 | seq_printf(m, "%u\n", *p); |
| 3619 | return 0; |
| 3620 | } |
| 3621 | |
| 3622 | static int ext4_ui_proc_open(struct inode *inode, struct file *file) |
| 3623 | { |
| 3624 | return single_open(file, ext4_ui_proc_show, PDE(inode)->data); |
| 3625 | } |
| 3626 | |
| 3627 | static ssize_t ext4_ui_proc_write(struct file *file, const char __user *buf, |
| 3628 | size_t cnt, loff_t *ppos) |
| 3629 | { |
Roel Kluin | 23475e2 | 2008-11-26 02:23:19 -0500 | [diff] [blame] | 3630 | unsigned long *p = PDE(file->f_path.dentry->d_inode)->data; |
Theodore Ts'o | 5e8814f | 2008-09-23 18:07:35 -0400 | [diff] [blame] | 3631 | char str[32]; |
Theodore Ts'o | 5e8814f | 2008-09-23 18:07:35 -0400 | [diff] [blame] | 3632 | |
| 3633 | if (cnt >= sizeof(str)) |
| 3634 | return -EINVAL; |
| 3635 | if (copy_from_user(str, buf, cnt)) |
| 3636 | return -EFAULT; |
Roel Kluin | 23475e2 | 2008-11-26 02:23:19 -0500 | [diff] [blame] | 3637 | |
| 3638 | *p = simple_strtoul(str, NULL, 0); |
Theodore Ts'o | 5e8814f | 2008-09-23 18:07:35 -0400 | [diff] [blame] | 3639 | return cnt; |
| 3640 | } |
| 3641 | |
| 3642 | const struct file_operations ext4_ui_proc_fops = { |
| 3643 | .owner = THIS_MODULE, |
| 3644 | .open = ext4_ui_proc_open, |
| 3645 | .read = seq_read, |
| 3646 | .llseek = seq_lseek, |
| 3647 | .release = single_release, |
| 3648 | .write = ext4_ui_proc_write, |
| 3649 | }; |
| 3650 | #endif |
| 3651 | |
Theodore Ts'o | 03010a3 | 2008-10-10 20:02:48 -0400 | [diff] [blame] | 3652 | static struct file_system_type ext4_fs_type = { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3653 | .owner = THIS_MODULE, |
Theodore Ts'o | 03010a3 | 2008-10-10 20:02:48 -0400 | [diff] [blame] | 3654 | .name = "ext4", |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3655 | .get_sb = ext4_get_sb, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3656 | .kill_sb = kill_block_super, |
| 3657 | .fs_flags = FS_REQUIRES_DEV, |
| 3658 | }; |
| 3659 | |
Theodore Ts'o | 03010a3 | 2008-10-10 20:02:48 -0400 | [diff] [blame] | 3660 | #ifdef CONFIG_EXT4DEV_COMPAT |
| 3661 | static int ext4dev_get_sb(struct file_system_type *fs_type, |
| 3662 | int flags, const char *dev_name, void *data, struct vfsmount *mnt) |
| 3663 | { |
| 3664 | printk(KERN_WARNING "EXT4-fs: Update your userspace programs " |
| 3665 | "to mount using ext4\n"); |
| 3666 | printk(KERN_WARNING "EXT4-fs: ext4dev backwards compatibility " |
| 3667 | "will go away by 2.6.31\n"); |
| 3668 | return get_sb_bdev(fs_type, flags, dev_name, data, ext4_fill_super, mnt); |
| 3669 | } |
| 3670 | |
| 3671 | static struct file_system_type ext4dev_fs_type = { |
| 3672 | .owner = THIS_MODULE, |
| 3673 | .name = "ext4dev", |
| 3674 | .get_sb = ext4dev_get_sb, |
| 3675 | .kill_sb = kill_block_super, |
| 3676 | .fs_flags = FS_REQUIRES_DEV, |
| 3677 | }; |
| 3678 | MODULE_ALIAS("ext4dev"); |
| 3679 | #endif |
| 3680 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3681 | static int __init init_ext4_fs(void) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3682 | { |
Alex Tomas | c9de560 | 2008-01-29 00:19:52 -0500 | [diff] [blame] | 3683 | int err; |
| 3684 | |
Theodore Ts'o | 9f6200b | 2008-09-23 09:18:24 -0400 | [diff] [blame] | 3685 | ext4_proc_root = proc_mkdir("fs/ext4", NULL); |
Alex Tomas | c9de560 | 2008-01-29 00:19:52 -0500 | [diff] [blame] | 3686 | err = init_ext4_mballoc(); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3687 | if (err) |
| 3688 | return err; |
Alex Tomas | c9de560 | 2008-01-29 00:19:52 -0500 | [diff] [blame] | 3689 | |
| 3690 | err = init_ext4_xattr(); |
| 3691 | if (err) |
| 3692 | goto out2; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3693 | err = init_inodecache(); |
| 3694 | if (err) |
| 3695 | goto out1; |
Theodore Ts'o | 03010a3 | 2008-10-10 20:02:48 -0400 | [diff] [blame] | 3696 | err = register_filesystem(&ext4_fs_type); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3697 | if (err) |
| 3698 | goto out; |
Theodore Ts'o | 03010a3 | 2008-10-10 20:02:48 -0400 | [diff] [blame] | 3699 | #ifdef CONFIG_EXT4DEV_COMPAT |
| 3700 | err = register_filesystem(&ext4dev_fs_type); |
| 3701 | if (err) { |
| 3702 | unregister_filesystem(&ext4_fs_type); |
| 3703 | goto out; |
| 3704 | } |
| 3705 | #endif |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3706 | return 0; |
| 3707 | out: |
| 3708 | destroy_inodecache(); |
| 3709 | out1: |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3710 | exit_ext4_xattr(); |
Alex Tomas | c9de560 | 2008-01-29 00:19:52 -0500 | [diff] [blame] | 3711 | out2: |
| 3712 | exit_ext4_mballoc(); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3713 | return err; |
| 3714 | } |
| 3715 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3716 | static void __exit exit_ext4_fs(void) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3717 | { |
Theodore Ts'o | 03010a3 | 2008-10-10 20:02:48 -0400 | [diff] [blame] | 3718 | unregister_filesystem(&ext4_fs_type); |
| 3719 | #ifdef CONFIG_EXT4DEV_COMPAT |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3720 | unregister_filesystem(&ext4dev_fs_type); |
Theodore Ts'o | 03010a3 | 2008-10-10 20:02:48 -0400 | [diff] [blame] | 3721 | #endif |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3722 | destroy_inodecache(); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3723 | exit_ext4_xattr(); |
Alex Tomas | c9de560 | 2008-01-29 00:19:52 -0500 | [diff] [blame] | 3724 | exit_ext4_mballoc(); |
Theodore Ts'o | 9f6200b | 2008-09-23 09:18:24 -0400 | [diff] [blame] | 3725 | remove_proc_entry("fs/ext4", NULL); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3726 | } |
| 3727 | |
| 3728 | MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3729 | MODULE_DESCRIPTION("Fourth Extended Filesystem with extents"); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3730 | MODULE_LICENSE("GPL"); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 3731 | module_init(init_ext4_fs) |
| 3732 | module_exit(exit_ext4_fs) |