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| author | Jeff Mahoney <jeffm@suse.com> | 2013-07-09 20:37:21 (GMT) |
|---|---|---|
| committer | Chris Mason <chris.mason@fusionio.com> | 2013-09-01 11:57:23 (GMT) |
| commit | ee3441b49092000402748f5345ee0a3d4c8ac04e (patch) | |
| tree | 34ee8c6a2e89451eb8936f5d91d650c3bd475847 /fs/btrfs/extent-tree.c | |
| parent | 74be9510876a66ad9826613ac8a526d26f9e7f01 (diff) | |
| download | linux-fsl-qoriq-ee3441b49092000402748f5345ee0a3d4c8ac04e.tar.xz | |
btrfs: fall back to global reservation when removing subvolumes
I recently did some ENOSPC testing that involved filling the disk
while create and removing snapshots in a loop. During the test cycle,
I ran into an ENOSPC when trying to remove a snapshot, leaving the fs
stuck in ENOSPC even after a umount/mount cycle.
This patch allow subvolume removal to fall back onto the global
block reservation in order to succeed when it would have failed
otherwise.
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
Diffstat (limited to 'fs/btrfs/extent-tree.c')
| -rw-r--r-- | fs/btrfs/extent-tree.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index 3e7e05e..7bea4d2 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -4742,10 +4742,12 @@ void btrfs_orphan_release_metadata(struct inode *inode) int btrfs_subvolume_reserve_metadata(struct btrfs_root *root, struct btrfs_block_rsv *rsv, int items, - u64 *qgroup_reserved) + u64 *qgroup_reserved, + bool use_global_rsv) { u64 num_bytes; int ret; + struct btrfs_block_rsv *global_rsv = &root->fs_info->global_block_rsv; if (root->fs_info->quota_enabled) { /* One for parent inode, two for dir entries */ @@ -4764,6 +4766,10 @@ int btrfs_subvolume_reserve_metadata(struct btrfs_root *root, BTRFS_BLOCK_GROUP_METADATA); ret = btrfs_block_rsv_add(root, rsv, num_bytes, BTRFS_RESERVE_FLUSH_ALL); + + if (ret == -ENOSPC && use_global_rsv) + ret = btrfs_block_rsv_migrate(global_rsv, rsv, num_bytes); + if (ret) { if (*qgroup_reserved) btrfs_qgroup_free(root, *qgroup_reserved); |