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authorJan Kara <jack@suse.cz>2008-04-28 02:14:33 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-04-28 08:58:33 -0700
commit0ff5af8340aa6be44220d7237ef4a654314cf795 (patch)
treea9536ea573725931cd4eb3139f4885887e3f8bf8 /fs/super.c
parent03f6e92bdd467aed9d7571a571868563ae6ad288 (diff)
downloadblackbird-op-linux-0ff5af8340aa6be44220d7237ef4a654314cf795.tar.gz
blackbird-op-linux-0ff5af8340aa6be44220d7237ef4a654314cf795.zip
quota: quota core changes for quotaon on remount
Currently, we just turn quotas off on remount of filesystem to read-only state. The patch below adds necessary framework so that we can turn quotas off on remount RO but we are able to automatically reenable them again when filesystem is remounted to RW state. All we need to do is to keep references to inodes of quota files when remounting RO and using these references to reenable quotas when remounting RW. Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/super.c')
-rw-r--r--fs/super.c10
1 files changed, 8 insertions, 2 deletions
diff --git a/fs/super.c b/fs/super.c
index 4798350b2bc9..a5a4aca7e22f 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -179,7 +179,7 @@ void deactivate_super(struct super_block *s)
if (atomic_dec_and_lock(&s->s_active, &sb_lock)) {
s->s_count -= S_BIAS-1;
spin_unlock(&sb_lock);
- DQUOT_OFF(s);
+ DQUOT_OFF(s, 0);
down_write(&s->s_umount);
fs->kill_sb(s);
put_filesystem(fs);
@@ -608,6 +608,7 @@ retry:
int do_remount_sb(struct super_block *sb, int flags, void *data, int force)
{
int retval;
+ int remount_rw;
#ifdef CONFIG_BLOCK
if (!(flags & MS_RDONLY) && bdev_read_only(sb->s_bdev))
@@ -625,8 +626,11 @@ int do_remount_sb(struct super_block *sb, int flags, void *data, int force)
mark_files_ro(sb);
else if (!fs_may_remount_ro(sb))
return -EBUSY;
- DQUOT_OFF(sb);
+ retval = DQUOT_OFF(sb, 1);
+ if (retval < 0 && retval != -ENOSYS)
+ return -EBUSY;
}
+ remount_rw = !(flags & MS_RDONLY) && (sb->s_flags & MS_RDONLY);
if (sb->s_op->remount_fs) {
lock_super(sb);
@@ -636,6 +640,8 @@ int do_remount_sb(struct super_block *sb, int flags, void *data, int force)
return retval;
}
sb->s_flags = (sb->s_flags & ~MS_RMT_MASK) | (flags & MS_RMT_MASK);
+ if (remount_rw)
+ DQUOT_ON_REMOUNT(sb);
return 0;
}
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