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Diffstat (limited to 'fs/ext4/super.c')
-rw-r--r--fs/ext4/super.c316
1 files changed, 167 insertions, 149 deletions
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 1e69f29a8c5..d5d77958b86 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -49,20 +49,19 @@ static int ext4_load_journal(struct super_block *, struct ext4_super_block *,
unsigned long journal_devnum);
static int ext4_create_journal(struct super_block *, struct ext4_super_block *,
unsigned int);
-static void ext4_commit_super (struct super_block * sb,
- struct ext4_super_block * es,
- int sync);
-static void ext4_mark_recovery_complete(struct super_block * sb,
- struct ext4_super_block * es);
-static void ext4_clear_journal_err(struct super_block * sb,
- struct ext4_super_block * es);
+static void ext4_commit_super(struct super_block *sb,
+ struct ext4_super_block *es, int sync);
+static void ext4_mark_recovery_complete(struct super_block *sb,
+ struct ext4_super_block *es);
+static void ext4_clear_journal_err(struct super_block *sb,
+ struct ext4_super_block *es);
static int ext4_sync_fs(struct super_block *sb, int wait);
-static const char *ext4_decode_error(struct super_block * sb, int errno,
+static const char *ext4_decode_error(struct super_block *sb, int errno,
char nbuf[16]);
-static int ext4_remount (struct super_block * sb, int * flags, char * data);
-static int ext4_statfs (struct dentry * dentry, struct kstatfs * buf);
+static int ext4_remount(struct super_block *sb, int *flags, char *data);
+static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf);
static void ext4_unlockfs(struct super_block *sb);
-static void ext4_write_super (struct super_block * sb);
+static void ext4_write_super(struct super_block *sb);
static void ext4_write_super_lockfs(struct super_block *sb);
@@ -211,15 +210,15 @@ static void ext4_handle_error(struct super_block *sb)
if (sb->s_flags & MS_RDONLY)
return;
- if (!test_opt (sb, ERRORS_CONT)) {
+ if (!test_opt(sb, ERRORS_CONT)) {
journal_t *journal = EXT4_SB(sb)->s_journal;
EXT4_SB(sb)->s_mount_opt |= EXT4_MOUNT_ABORT;
if (journal)
jbd2_journal_abort(journal, -EIO);
}
- if (test_opt (sb, ERRORS_RO)) {
- printk (KERN_CRIT "Remounting filesystem read-only\n");
+ if (test_opt(sb, ERRORS_RO)) {
+ printk(KERN_CRIT "Remounting filesystem read-only\n");
sb->s_flags |= MS_RDONLY;
}
ext4_commit_super(sb, es, 1);
@@ -228,13 +227,13 @@ static void ext4_handle_error(struct super_block *sb)
sb->s_id);
}
-void ext4_error (struct super_block * sb, const char * function,
- const char * fmt, ...)
+void ext4_error(struct super_block *sb, const char *function,
+ const char *fmt, ...)
{
va_list args;
va_start(args, fmt);
- printk(KERN_CRIT "EXT4-fs error (device %s): %s: ",sb->s_id, function);
+ printk(KERN_CRIT "EXT4-fs error (device %s): %s: ", sb->s_id, function);
vprintk(fmt, args);
printk("\n");
va_end(args);
@@ -242,7 +241,7 @@ void ext4_error (struct super_block * sb, const char * function,
ext4_handle_error(sb);
}
-static const char *ext4_decode_error(struct super_block * sb, int errno,
+static const char *ext4_decode_error(struct super_block *sb, int errno,
char nbuf[16])
{
char *errstr = NULL;
@@ -278,8 +277,7 @@ static const char *ext4_decode_error(struct super_block * sb, int errno,
/* __ext4_std_error decodes expected errors from journaling functions
* automatically and invokes the appropriate error response. */
-void __ext4_std_error (struct super_block * sb, const char * function,
- int errno)
+void __ext4_std_error(struct super_block *sb, const char *function, int errno)
{
char nbuf[16];
const char *errstr;
@@ -292,8 +290,8 @@ void __ext4_std_error (struct super_block * sb, const char * function,
return;
errstr = ext4_decode_error(sb, errno, nbuf);
- printk (KERN_CRIT "EXT4-fs error (device %s) in %s: %s\n",
- sb->s_id, function, errstr);
+ printk(KERN_CRIT "EXT4-fs error (device %s) in %s: %s\n",
+ sb->s_id, function, errstr);
ext4_handle_error(sb);
}
@@ -308,15 +306,15 @@ void __ext4_std_error (struct super_block * sb, const char * function,
* case we take the easy way out and panic immediately.
*/
-void ext4_abort (struct super_block * sb, const char * function,
- const char * fmt, ...)
+void ext4_abort(struct super_block *sb, const char *function,
+ const char *fmt, ...)
{
va_list args;
- printk (KERN_CRIT "ext4_abort called.\n");
+ printk(KERN_CRIT "ext4_abort called.\n");
va_start(args, fmt);
- printk(KERN_CRIT "EXT4-fs error (device %s): %s: ",sb->s_id, function);
+ printk(KERN_CRIT "EXT4-fs error (device %s): %s: ", sb->s_id, function);
vprintk(fmt, args);
printk("\n");
va_end(args);
@@ -334,8 +332,8 @@ void ext4_abort (struct super_block * sb, const char * function,
jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO);
}
-void ext4_warning (struct super_block * sb, const char * function,
- const char * fmt, ...)
+void ext4_warning(struct super_block *sb, const char *function,
+ const char *fmt, ...)
{
va_list args;
@@ -496,7 +494,7 @@ static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi)
}
}
-static void ext4_put_super (struct super_block * sb)
+static void ext4_put_super(struct super_block *sb)
{
struct ext4_sb_info *sbi = EXT4_SB(sb);
struct ext4_super_block *es = sbi->s_es;
@@ -647,7 +645,8 @@ static void ext4_clear_inode(struct inode *inode)
&EXT4_I(inode)->jinode);
}
-static inline void ext4_show_quota_options(struct seq_file *seq, struct super_block *sb)
+static inline void ext4_show_quota_options(struct seq_file *seq,
+ struct super_block *sb)
{
#if defined(CONFIG_QUOTA)
struct ext4_sb_info *sbi = EXT4_SB(sb);
@@ -822,8 +821,8 @@ static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid,
}
#ifdef CONFIG_QUOTA
-#define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group")
-#define QTYPE2MOPT(on, t) ((t)==USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA))
+#define QTYPE2NAME(t) ((t) == USRQUOTA?"user":"group")
+#define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA))
static int ext4_dquot_initialize(struct inode *inode, int type);
static int ext4_dquot_drop(struct inode *inode);
@@ -991,12 +990,12 @@ static ext4_fsblk_t get_sb_block(void **data)
return sb_block;
}
-static int parse_options (char *options, struct super_block *sb,
- unsigned int *inum, unsigned long *journal_devnum,
- ext4_fsblk_t *n_blocks_count, int is_remount)
+static int parse_options(char *options, struct super_block *sb,
+ unsigned int *inum, unsigned long *journal_devnum,
+ ext4_fsblk_t *n_blocks_count, int is_remount)
{
struct ext4_sb_info *sbi = EXT4_SB(sb);
- char * p;
+ char *p;
substring_t args[MAX_OPT_ARGS];
int data_opt = 0;
int option;
@@ -1009,7 +1008,7 @@ static int parse_options (char *options, struct super_block *sb,
if (!options)
return 1;
- while ((p = strsep (&options, ",")) != NULL) {
+ while ((p = strsep(&options, ",")) != NULL) {
int token;
if (!*p)
continue;
@@ -1017,16 +1016,16 @@ static int parse_options (char *options, struct super_block *sb,
token = match_token(p, tokens, args);
switch (token) {
case Opt_bsd_df:
- clear_opt (sbi->s_mount_opt, MINIX_DF);
+ clear_opt(sbi->s_mount_opt, MINIX_DF);
break;
case Opt_minix_df:
- set_opt (sbi->s_mount_opt, MINIX_DF);
+ set_opt(sbi->s_mount_opt, MINIX_DF);
break;
case Opt_grpid:
- set_opt (sbi->s_mount_opt, GRPID);
+ set_opt(sbi->s_mount_opt, GRPID);
break;
case Opt_nogrpid:
- clear_opt (sbi->s_mount_opt, GRPID);
+ clear_opt(sbi->s_mount_opt, GRPID);
break;
case Opt_resuid:
if (match_int(&args[0], &option))
@@ -1043,41 +1042,41 @@ static int parse_options (char *options, struct super_block *sb,
/* *sb_block = match_int(&args[0]); */
break;
case Opt_err_panic:
- clear_opt (sbi->s_mount_opt, ERRORS_CONT);
- clear_opt (sbi->s_mount_opt, ERRORS_RO);
- set_opt (sbi->s_mount_opt, ERRORS_PANIC);
+ clear_opt(sbi->s_mount_opt, ERRORS_CONT);
+ clear_opt(sbi->s_mount_opt, ERRORS_RO);
+ set_opt(sbi->s_mount_opt, ERRORS_PANIC);
break;
case Opt_err_ro:
- clear_opt (sbi->s_mount_opt, ERRORS_CONT);
- clear_opt (sbi->s_mount_opt, ERRORS_PANIC);
- set_opt (sbi->s_mount_opt, ERRORS_RO);
+ clear_opt(sbi->s_mount_opt, ERRORS_CONT);
+ clear_opt(sbi->s_mount_opt, ERRORS_PANIC);
+ set_opt(sbi->s_mount_opt, ERRORS_RO);
break;
case Opt_err_cont:
- clear_opt (sbi->s_mount_opt, ERRORS_RO);
- clear_opt (sbi->s_mount_opt, ERRORS_PANIC);
- set_opt (sbi->s_mount_opt, ERRORS_CONT);
+ clear_opt(sbi->s_mount_opt, ERRORS_RO);
+ clear_opt(sbi->s_mount_opt, ERRORS_PANIC);
+ set_opt(sbi->s_mount_opt, ERRORS_CONT);
break;
case Opt_nouid32:
- set_opt (sbi->s_mount_opt, NO_UID32);
+ set_opt(sbi->s_mount_opt, NO_UID32);
break;
case Opt_nocheck:
- clear_opt (sbi->s_mount_opt, CHECK);
+ clear_opt(sbi->s_mount_opt, CHECK);
break;
case Opt_debug:
- set_opt (sbi->s_mount_opt, DEBUG);
+ set_opt(sbi->s_mount_opt, DEBUG);
break;
case Opt_oldalloc:
- set_opt (sbi->s_mount_opt, OLDALLOC);
+ set_opt(sbi->s_mount_opt, OLDALLOC);
break;
case Opt_orlov:
- clear_opt (sbi->s_mount_opt, OLDALLOC);
+ clear_opt(sbi->s_mount_opt, OLDALLOC);
break;
#ifdef CONFIG_EXT4DEV_FS_XATTR
case Opt_user_xattr:
- set_opt (sbi->s_mount_opt, XATTR_USER);
+ set_opt(sbi->s_mount_opt, XATTR_USER);
break;
case Opt_nouser_xattr:
- clear_opt (sbi->s_mount_opt, XATTR_USER);
+ clear_opt(sbi->s_mount_opt, XATTR_USER);
break;
#else
case Opt_user_xattr:
@@ -1115,7 +1114,7 @@ static int parse_options (char *options, struct super_block *sb,
"journal on remount\n");
return 0;
}
- set_opt (sbi->s_mount_opt, UPDATE_JOURNAL);
+ set_opt(sbi->s_mount_opt, UPDATE_JOURNAL);
break;
case Opt_journal_inum:
if (is_remount) {
@@ -1145,7 +1144,7 @@ static int parse_options (char *options, struct super_block *sb,
set_opt(sbi->s_mount_opt, JOURNAL_CHECKSUM);
break;
case Opt_noload:
- set_opt (sbi->s_mount_opt, NOLOAD);
+ set_opt(sbi->s_mount_opt, NOLOAD);
break;
case Opt_commit:
if (match_int(&args[0], &option))
@@ -1331,7 +1330,7 @@ set_qf_format:
"on this filesystem, use tune2fs\n");
return 0;
}
- set_opt (sbi->s_mount_opt, EXTENTS);
+ set_opt(sbi->s_mount_opt, EXTENTS);
break;
case Opt_noextents:
/*
@@ -1348,7 +1347,7 @@ set_qf_format:
"-o noextents options\n");
return 0;
}
- clear_opt (sbi->s_mount_opt, EXTENTS);
+ clear_opt(sbi->s_mount_opt, EXTENTS);
break;
case Opt_i_version:
set_opt(sbi->s_mount_opt, I_VERSION);
@@ -1374,9 +1373,9 @@ set_qf_format:
set_opt(sbi->s_mount_opt, DELALLOC);
break;
default:
- printk (KERN_ERR
- "EXT4-fs: Unrecognized mount option \"%s\" "
- "or missing value\n", p);
+ printk(KERN_ERR
+ "EXT4-fs: Unrecognized mount option \"%s\" "
+ "or missing value\n", p);
return 0;
}
}
@@ -1423,31 +1422,31 @@ static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es,
int res = 0;
if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) {
- printk (KERN_ERR "EXT4-fs warning: revision level too high, "
- "forcing read-only mode\n");
+ printk(KERN_ERR "EXT4-fs warning: revision level too high, "
+ "forcing read-only mode\n");
res = MS_RDONLY;
}
if (read_only)
return res;
if (!(sbi->s_mount_state & EXT4_VALID_FS))
- printk (KERN_WARNING "EXT4-fs warning: mounting unchecked fs, "
- "running e2fsck is recommended\n");
+ printk(KERN_WARNING "EXT4-fs warning: mounting unchecked fs, "
+ "running e2fsck is recommended\n");
else if ((sbi->s_mount_state & EXT4_ERROR_FS))
- printk (KERN_WARNING
- "EXT4-fs warning: mounting fs with errors, "
- "running e2fsck is recommended\n");
+ printk(KERN_WARNING
+ "EXT4-fs warning: mounting fs with errors, "
+ "running e2fsck is recommended\n");
else if ((__s16) le16_to_cpu(es->s_max_mnt_count) >= 0 &&
le16_to_cpu(es->s_mnt_count) >=
(unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count))
- printk (KERN_WARNING
- "EXT4-fs warning: maximal mount count reached, "
- "running e2fsck is recommended\n");
+ printk(KERN_WARNING
+ "EXT4-fs warning: maximal mount count reached, "
+ "running e2fsck is recommended\n");
else if (le32_to_cpu(es->s_checkinterval) &&
(le32_to_cpu(es->s_lastcheck) +
le32_to_cpu(es->s_checkinterval) <= get_seconds()))
- printk (KERN_WARNING
- "EXT4-fs warning: checktime reached, "
- "running e2fsck is recommended\n");
+ printk(KERN_WARNING
+ "EXT4-fs warning: checktime reached, "
+ "running e2fsck is recommended\n");
#if 0
/* @@@ We _will_ want to clear the valid bit if we find
* inconsistencies, to force a fsck at reboot. But for
@@ -1506,14 +1505,13 @@ static int ext4_fill_flex_info(struct super_block *sb)
flex_group_count = (sbi->s_groups_count + groups_per_flex - 1) /
groups_per_flex;
- sbi->s_flex_groups = kmalloc(flex_group_count *
+ sbi->s_flex_groups = kzalloc(flex_group_count *
sizeof(struct flex_groups), GFP_KERNEL);
if (sbi->s_flex_groups == NULL) {
- printk(KERN_ERR "EXT4-fs: not enough memory\n");
+ printk(KERN_ERR "EXT4-fs: not enough memory for "
+ "%lu flex groups\n", flex_group_count);
goto failed;
}
- memset(sbi->s_flex_groups, 0, flex_group_count *
- sizeof(struct flex_groups));
gdp = ext4_get_group_desc(sb, 1, &bh);
block_bitmap = ext4_block_bitmap(sb, gdp) - 1;
@@ -1597,16 +1595,14 @@ static int ext4_check_descriptors(struct super_block *sb)
(EXT4_BLOCKS_PER_GROUP(sb) - 1);
block_bitmap = ext4_block_bitmap(sb, gdp);
- if (block_bitmap < first_block || block_bitmap > last_block)
- {
+ if (block_bitmap < first_block || block_bitmap > last_block) {
printk(KERN_ERR "EXT4-fs: ext4_check_descriptors: "
"Block bitmap for group %lu not in group "
"(block %llu)!", i, block_bitmap);
return 0;
}
inode_bitmap = ext4_inode_bitmap(sb, gdp);
- if (inode_bitmap < first_block || inode_bitmap > last_block)
- {
+ if (inode_bitmap < first_block || inode_bitmap > last_block) {
printk(KERN_ERR "EXT4-fs: ext4_check_descriptors: "
"Inode bitmap for group %lu not in group "
"(block %llu)!", i, inode_bitmap);
@@ -1614,26 +1610,28 @@ static int ext4_check_descriptors(struct super_block *sb)
}
inode_table = ext4_inode_table(sb, gdp);
if (inode_table < first_block ||
- inode_table + sbi->s_itb_per_group - 1 > last_block)
- {
+ inode_table + sbi->s_itb_per_group - 1 > last_block) {
printk(KERN_ERR "EXT4-fs: ext4_check_descriptors: "
"Inode table for group %lu not in group "
"(block %llu)!", i, inode_table);
return 0;
}
+ spin_lock(sb_bgl_lock(sbi, i));
if (!ext4_group_desc_csum_verify(sbi, i, gdp)) {
printk(KERN_ERR "EXT4-fs: ext4_check_descriptors: "
"Checksum for group %lu failed (%u!=%u)\n",
i, le16_to_cpu(ext4_group_desc_csum(sbi, i,
gdp)), le16_to_cpu(gdp->bg_checksum));
- return 0;
+ if (!(sb->s_flags & MS_RDONLY))
+ return 0;
}
+ spin_unlock(sb_bgl_lock(sbi, i));
if (!flexbg_flag)
first_block += EXT4_BLOCKS_PER_GROUP(sb);
}
ext4_free_blocks_count_set(sbi->s_es, ext4_count_free_blocks(sb));
- sbi->s_es->s_free_inodes_count=cpu_to_le32(ext4_count_free_inodes(sb));
+ sbi->s_es->s_free_inodes_count = cpu_to_le32(ext4_count_free_inodes(sb));
return 1;
}
@@ -1654,8 +1652,8 @@ static int ext4_check_descriptors(struct super_block *sb)
* e2fsck was run on this filesystem, and it must have already done the orphan
* inode cleanup for us, so we can safely abort without any further action.
*/
-static void ext4_orphan_cleanup (struct super_block * sb,
- struct ext4_super_block * es)
+static void ext4_orphan_cleanup(struct super_block *sb,
+ struct ext4_super_block *es)
{
unsigned int s_flags = sb->s_flags;
int nr_orphans = 0, nr_truncates = 0;
@@ -1732,7 +1730,7 @@ static void ext4_orphan_cleanup (struct super_block * sb,
iput(inode); /* The delete magic happens here! */
}
-#define PLURAL(x) (x), ((x)==1) ? "" : "s"
+#define PLURAL(x) (x), ((x) == 1) ? "" : "s"
if (nr_orphans)
printk(KERN_INFO "EXT4-fs: %s: %d orphan inode%s deleted\n",
@@ -1899,12 +1897,12 @@ static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi)
return 0;
}
-static int ext4_fill_super (struct super_block *sb, void *data, int silent)
+static int ext4_fill_super(struct super_block *sb, void *data, int silent)
__releases(kernel_lock)
__acquires(kernel_lock)
{
- struct buffer_head * bh;
+ struct buffer_head *bh;
struct ext4_super_block *es = NULL;
struct ext4_sb_info *sbi;
ext4_fsblk_t block;
@@ -1953,7 +1951,7 @@ static int ext4_fill_super (struct super_block *sb, void *data, int silent)
}
if (!(bh = sb_bread(sb, logical_sb_block))) {
- printk (KERN_ERR "EXT4-fs: unable to read superblock\n");
+ printk(KERN_ERR "EXT4-fs: unable to read superblock\n");
goto out_fail;
}
/*
@@ -2026,8 +2024,8 @@ static int ext4_fill_super (struct super_block *sb, void *data, int silent)
set_opt(sbi->s_mount_opt, DELALLOC);
- if (!parse_options ((char *) data, sb, &journal_inum, &journal_devnum,
- NULL, 0))
+ if (!parse_options((char *) data, sb, &journal_inum, &journal_devnum,
+ NULL, 0))
goto failed_mount;
sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
@@ -2102,7 +2100,7 @@ static int ext4_fill_super (struct super_block *sb, void *data, int silent)
goto failed_mount;
}
- brelse (bh);
+ brelse(bh);
logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE;
offset = do_div(logical_sb_block, blocksize);
bh = sb_bread(sb, logical_sb_block);
@@ -2114,8 +2112,8 @@ static int ext4_fill_super (struct super_block *sb, void *data, int silent)
es = (struct ext4_super_block *)(((char *)bh->b_data) + offset);
sbi->s_es = es;
if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) {
- printk (KERN_ERR
- "EXT4-fs: Magic mismatch, very weird !\n");
+ printk(KERN_ERR
+ "EXT4-fs: Magic mismatch, very weird !\n");
goto failed_mount;
}
}
@@ -2132,9 +2130,9 @@ static int ext4_fill_super (struct super_block *sb, void *data, int silent)
if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) ||
(!is_power_of_2(sbi->s_inode_size)) ||
(sbi->s_inode_size > blocksize)) {
- printk (KERN_ERR
- "EXT4-fs: unsupported inode size: %d\n",
- sbi->s_inode_size);
+ printk(KERN_ERR
+ "EXT4-fs: unsupported inode size: %d\n",
+ sbi->s_inode_size);
goto failed_mount;
}
if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE)
@@ -2166,20 +2164,20 @@ static int ext4_fill_super (struct super_block *sb, void *data, int silent)
sbi->s_mount_state = le16_to_cpu(es->s_state);
sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb));
sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb));
- for (i=0; i < 4; i++)
+ for (i = 0; i < 4; i++)
sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]);
sbi->s_def_hash_version = es->s_def_hash_version;
if (sbi->s_blocks_per_group > blocksize * 8) {
- printk (KERN_ERR
- "EXT4-fs: #blocks per group too big: %lu\n",
- sbi->s_blocks_per_group);
+ printk(KERN_ERR
+ "EXT4-fs: #blocks per group too big: %lu\n",
+ sbi->s_blocks_per_group);
goto failed_mount;
}
if (sbi->s_inodes_per_group > blocksize * 8) {
- printk (KERN_ERR
- "EXT4-fs: #inodes per group too big: %lu\n",
- sbi->s_inodes_per_group);
+ printk(KERN_ERR
+ "EXT4-fs: #inodes per group too big: %lu\n",
+ sbi->s_inodes_per_group);
goto failed_mount;
}
@@ -2213,10 +2211,10 @@ static int ext4_fill_super (struct super_block *sb, void *data, int silent)
sbi->s_groups_count = blocks_count;
db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) /
EXT4_DESC_PER_BLOCK(sb);
- sbi->s_group_desc = kmalloc(db_count * sizeof (struct buffer_head *),
+ sbi->s_group_desc = kmalloc(db_count * sizeof(struct buffer_head *),
GFP_KERNEL);
if (sbi->s_group_desc == NULL) {
- printk (KERN_ERR "EXT4-fs: not enough memory\n");
+ printk(KERN_ERR "EXT4-fs: not enough memory\n");
goto failed_mount;
}
@@ -2226,13 +2224,13 @@ static int ext4_fill_super (struct super_block *sb, void *data, int silent)
block = descriptor_loc(sb, logical_sb_block, i);
sbi->s_group_desc[i] = sb_bread(sb, block);
if (!sbi->s_group_desc[i]) {
- printk (KERN_ERR "EXT4-fs: "
- "can't read group descriptor %d\n", i);
+ printk(KERN_ERR "EXT4-fs: "
+ "can't read group descriptor %d\n", i);
db_count = i;
goto failed_mount2;
}
}
- if (!ext4_check_descriptors (sb)) {
+ if (!ext4_check_descriptors(sb)) {
printk(KERN_ERR "EXT4-fs: group descriptors corrupted!\n");
goto failed_mount2;
}
@@ -2308,11 +2306,11 @@ static int ext4_fill_super (struct super_block *sb, void *data, int silent)
EXT4_SB(sb)->s_journal->j_failed_commit) {
printk(KERN_CRIT "EXT4-fs error (device %s): "
"ext4_fill_super: Journal transaction "
- "%u is corrupt\n", sb->s_id,
+ "%u is corrupt\n", sb->s_id,
EXT4_SB(sb)->s_journal->j_failed_commit);
- if (test_opt (sb, ERRORS_RO)) {
- printk (KERN_CRIT
- "Mounting filesystem read-only\n");
+ if (test_opt(sb, ERRORS_RO)) {
+ printk(KERN_CRIT
+ "Mounting filesystem read-only\n");
sb->s_flags |= MS_RDONLY;
EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS;
es->s_state |= cpu_to_le16(EXT4_ERROR_FS);
@@ -2332,9 +2330,9 @@ static int ext4_fill_super (struct super_block *sb, void *data, int silent)
goto failed_mount3;
} else {
if (!silent)
- printk (KERN_ERR
- "ext4: No journal on filesystem on %s\n",
- sb->s_id);
+ printk(KERN_ERR
+ "ext4: No journal on filesystem on %s\n",
+ sb->s_id);
goto failed_mount3;
}
@@ -2418,7 +2416,7 @@ static int ext4_fill_super (struct super_block *sb, void *data, int silent)
goto failed_mount4;
}
- ext4_setup_super (sb, es, sb->s_flags & MS_RDONLY);
+ ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY);
/* determine the minimum size of new large inodes, if present */
if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) {
@@ -2457,12 +2455,12 @@ static int ext4_fill_super (struct super_block *sb, void *data, int silent)
ext4_orphan_cleanup(sb, es);
EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS;
if (needs_recovery)
- printk (KERN_INFO "EXT4-fs: recovery complete.\n");
+ printk(KERN_INFO "EXT4-fs: recovery complete.\n");
ext4_mark_recovery_complete(sb, es);
- printk (KERN_INFO "EXT4-fs: mounted filesystem with %s data mode.\n",
- test_opt(sb,DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA ? "journal":
- test_opt(sb,DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA ? "ordered":
- "writeback");
+ printk(KERN_INFO "EXT4-fs: mounted filesystem with %s data mode.\n",
+ test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA ? "journal":
+ test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA ? "ordered":
+ "writeback");
if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) {
printk(KERN_WARNING "EXT4-fs: Ignoring delalloc option - "
@@ -2575,14 +2573,14 @@ static journal_t *ext4_get_journal(struct super_block *sb,
static journal_t *ext4_get_dev_journal(struct super_block *sb,
dev_t j_dev)
{
- struct buffer_head * bh;
+ struct buffer_head *bh;
journal_t *journal;
ext4_fsblk_t start;
ext4_fsblk_t len;
int hblock, blocksize;
ext4_fsblk_t sb_block;
unsigned long offset;
- struct ext4_super_block * es;
+ struct ext4_super_block *es;
struct block_device *bdev;
bdev = ext4_blkdev_get(j_dev);
@@ -2697,8 +2695,8 @@ static int ext4_load_journal(struct super_block *sb,
"unavailable, cannot proceed.\n");
return -EROFS;
}
- printk (KERN_INFO "EXT4-fs: write access will "
- "be enabled during recovery.\n");
+ printk(KERN_INFO "EXT4-fs: write access will "
+ "be enabled during recovery.\n");
}
}
@@ -2751,8 +2749,8 @@ static int ext4_load_journal(struct super_block *sb,
return 0;
}
-static int ext4_create_journal(struct super_block * sb,
- struct ext4_super_block * es,
+static int ext4_create_journal(struct super_block *sb,
+ struct ext4_super_block *es,
unsigned int journal_inum)
{
journal_t *journal;
@@ -2793,9 +2791,8 @@ static int ext4_create_journal(struct super_block * sb,
return 0;
}
-static void ext4_commit_super (struct super_block * sb,
- struct ext4_super_block * es,
- int sync)
+static void ext4_commit_super(struct super_block *sb,
+ struct ext4_super_block *es, int sync)
{
struct buffer_head *sbh = EXT4_SB(sb)->s_sbh;
@@ -2816,8 +2813,8 @@ static void ext4_commit_super (struct super_block * sb,
* remounting) the filesystem readonly, then we will end up with a
* consistent fs on disk. Record that fact.
*/
-static void ext4_mark_recovery_complete(struct super_block * sb,
- struct ext4_super_block * es)
+static void ext4_mark_recovery_complete(struct super_block *sb,
+ struct ext4_super_block *es)
{
journal_t *journal = EXT4_SB(sb)->s_journal;
@@ -2839,8 +2836,8 @@ static void ext4_mark_recovery_complete(struct super_block * sb,
* has recorded an error from a previous lifetime, move that error to the
* main filesystem now.
*/
-static void ext4_clear_journal_err(struct super_block * sb,
- struct ext4_super_block * es)
+static void ext4_clear_journal_err(struct super_block *sb,
+ struct ext4_super_block *es)
{
journal_t *journal;
int j_errno;
@@ -2865,7 +2862,7 @@ static void ext4_clear_journal_err(struct super_block * sb,
EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS;
es->s_state |= cpu_to_le16(EXT4_ERROR_FS);
- ext4_commit_super (sb, es, 1);
+ ext4_commit_super(sb, es, 1);
jbd2_journal_clear_err(journal);
}
@@ -2898,7 +2895,7 @@ int ext4_force_commit(struct super_block *sb)
* This implicitly triggers the writebehind on sync().
*/
-static void ext4_write_super (struct super_block * sb)
+static void ext4_write_super(struct super_block *sb)
{
if (mutex_trylock(&sb->s_lock) != 0)
BUG();
@@ -2954,13 +2951,14 @@ static void ext4_unlockfs(struct super_block *sb)
}
}
-static int ext4_remount (struct super_block * sb, int * flags, char * data)
+static int ext4_remount(struct super_block *sb, int *flags, char *data)
{
- struct ext4_super_block * es;
+ struct ext4_super_block *es;
struct ext4_sb_info *sbi = EXT4_SB(sb);
ext4_fsblk_t n_blocks_count = 0;
unsigned long old_sb_flags;
struct ext4_mount_options old_opts;
+ ext4_group_t g;
int err;
#ifdef CONFIG_QUOTA
int i;
@@ -3039,6 +3037,26 @@ static int ext4_remount (struct super_block * sb, int * flags, char * data)
}
/*
+ * Make sure the group descriptor checksums
+ * are sane. If they aren't, refuse to
+ * remount r/w.
+ */
+ for (g = 0; g < sbi->s_groups_count; g++) {
+ struct ext4_group_desc *gdp =
+ ext4_get_group_desc(sb, g, NULL);
+
+ if (!ext4_group_desc_csum_verify(sbi, g, gdp)) {
+ printk(KERN_ERR
+ "EXT4-fs: ext4_remount: "
+ "Checksum for group %lu failed (%u!=%u)\n",
+ g, le16_to_cpu(ext4_group_desc_csum(sbi, g, gdp)),
+ le16_to_cpu(gdp->bg_checksum));
+ err = -EINVAL;
+ goto restore_opts;
+ }
+ }
+
+ /*
* If we have an unprocessed orphan list hanging
* around from a previously readonly bdev mount,
* require a full umount/remount for now.
@@ -3063,7 +3081,7 @@ static int ext4_remount (struct super_block * sb, int * flags, char * data)
sbi->s_mount_state = le16_to_cpu(es->s_state);
if ((err = ext4_group_extend(sb, es, n_blocks_count)))
goto restore_opts;
- if (!ext4_setup_super (sb, es, 0))
+ if (!ext4_setup_super(sb, es, 0))
sb->s_flags &= ~MS_RDONLY;
}
}
@@ -3093,7 +3111,7 @@ restore_opts:
return err;
}
-static int ext4_statfs (struct dentry * dentry, struct kstatfs * buf)
+static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf)
{
struct super_block *sb = dentry->d_sb;
struct ext4_sb_info *sbi = EXT4_SB(sb);
@@ -3331,12 +3349,12 @@ static int ext4_quota_on(struct super_block *sb, int type, int format_id,
}
/* Journaling quota? */
if (EXT4_SB(sb)->s_qf_names[type]) {
- /* Quotafile not of fs root? */
+ /* Quotafile not in fs root? */
if (nd.path.dentry->d_parent->d_inode != sb->s_root->d_inode)
printk(KERN_WARNING
"EXT4-fs: Quota file not on filesystem root. "
"Journaled quota will not work.\n");
- }
+ }
/*
* When we journal data on quota file, we have to flush journal to see
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-11-24 11:58:24 +0000