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Btrfs: make the snap/subv deletion end more early when the fs is R/O

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The snapshot/subvolume deletion might spend lots of time, it would make
the remount task wait for a long time. This patch improve this problem,
we will break the deletion if the fs is remounted to be R/O. It will make
the users happy.

Cc: David Sterba <dsterba@suse.cz>
Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
This commit is contained in:
Miao Xie
2013-05-14 10:20:43 +00:00
committed by Josef Bacik
parent dc7f370c05
commit babbf170c7
3 changed files with 15 additions and 14 deletions
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fs/btrfs/ctree.h
+12
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@@ -3318,6 +3318,18 @@ static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
smp_mb();
return fs_info->closing;
}
/*
* If we remount the fs to be R/O or umount the fs, the cleaner needn't do
* anything except sleeping. This function is used to check the status of
* the fs.
*/
static inline int btrfs_need_cleaner_sleep(struct btrfs_root *root)
{
return (root->fs_info->sb->s_flags & MS_RDONLY ||
btrfs_fs_closing(root->fs_info));
}
static inline void free_fs_info(struct btrfs_fs_info *fs_info)
{
kfree(fs_info->balance_ctl);