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ext4: fix quota inconsistency during orphan cleanup for read-only mounts

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commit 95f1fda47c upstream.

Quota does not get enabled for read-only mounts if filesystem
has quota feature, so that quotas cannot updated during orphan
cleanup, which will lead to quota inconsistency.

This patch turn on quotas during orphan cleanup for this case,
make sure quotas can be updated correctly.

Reported-by: Jan Kara <jack@suse.cz>
Signed-off-by: zhangyi (F) <yi.zhang@huawei.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
zhangyi (F)
2017-08-24 15:21:50 -04:00
committed by Greg Kroah-Hartman
parent cd46241eb0
commit c53f01698f
1 changed files with 31 additions and 7 deletions
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38
fs/ext4/super.c
View File

@@ -2205,6 +2205,7 @@ static void ext4_orphan_cleanup(struct super_block *sb,
unsigned int s_flags = sb->s_flags;
int nr_orphans = 0, nr_truncates = 0;
#ifdef CONFIG_QUOTA
int quota_update = 0;
int i;
#endif
if (!es->s_last_orphan) {
@@ -2243,14 +2244,32 @@ static void ext4_orphan_cleanup(struct super_block *sb,
#ifdef CONFIG_QUOTA
/* Needed for iput() to work correctly and not trash data */
sb->s_flags |= MS_ACTIVE;
/* Turn on journaled quotas so that they are updated correctly */
/*
* Turn on quotas which were not enabled for read-only mounts if
* filesystem has quota feature, so that they are updated correctly.
*/
if (ext4_has_feature_quota(sb) && (s_flags & MS_RDONLY)) {
int ret = ext4_enable_quotas(sb);
if (!ret)
quota_update = 1;
else
ext4_msg(sb, KERN_ERR,
"Cannot turn on quotas: error %d", ret);
}
/* Turn on journaled quotas used for old sytle */
for (i = 0; i < EXT4_MAXQUOTAS; i++) {
if (EXT4_SB(sb)->s_qf_names[i]) {
int ret = ext4_quota_on_mount(sb, i);
if (ret < 0)
if (!ret)
quota_update = 1;
else
ext4_msg(sb, KERN_ERR,
"Cannot turn on journaled "
"quota: error %d", ret);
"quota: type %d: error %d", i, ret);
}
}
#endif
@@ -2309,10 +2328,12 @@ static void ext4_orphan_cleanup(struct super_block *sb,
ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up",
PLURAL(nr_truncates));
#ifdef CONFIG_QUOTA
/* Turn off journaled quotas if they were enabled for orphan cleanup */
for (i = 0; i < EXT4_MAXQUOTAS; i++) {
if (EXT4_SB(sb)->s_qf_names[i] && sb_dqopt(sb)->files[i])
dquot_quota_off(sb, i);
/* Turn off quotas if they were enabled for orphan cleanup */
if (quota_update) {
for (i = 0; i < EXT4_MAXQUOTAS; i++) {
if (sb_dqopt(sb)->files[i])
dquot_quota_off(sb, i);
}
}
#endif
sb->s_flags = s_flags; /* Restore MS_RDONLY status */
@@ -5120,6 +5141,9 @@ static int ext4_enable_quotas(struct super_block *sb)
err = ext4_quota_enable(sb, type, QFMT_VFS_V1,
DQUOT_USAGE_ENABLED);
if (err) {
for (type--; type >= 0; type--)
dquot_quota_off(sb, type);
ext4_warning(sb,
"Failed to enable quota tracking "
"(type=%d, err=%d). Please run "