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| author | Zhao Lei <zhaolei@cn.fujitsu.com> | 2016-01-06 18:56:36 +0800 |
|---|---|---|
| committer | Chris Mason <clm@fb.com> | 2016-01-20 07:22:13 -0800 |
| commit | 0bc19f9031e0c59770286f82b8561c1d35064a65 (patch) | |
| tree | 2469a01dbf180d1e95d6aebd5f61271dd877ea0a /fs | |
| parent | ee22f0c4ec428e7f16d3c5fa1d55fd7860cb304a (diff) | |
| download | linux-0bc19f9031e0c59770286f82b8561c1d35064a65.tar.gz | |
btrfs: merge functions for wait snapshot creation
wait_for_snapshot_creation() is in same group with oher two: btrfs_start_write_no_snapshoting() btrfs_end_write_no_snapshoting() Rename wait_for_snapshot_creation() and move it into same place with other two. Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com> Signed-off-by: Chris Mason <clm@fb.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/btrfs/ctree.h | 1 | ||||
| -rw-r--r-- | fs/btrfs/extent-tree.c | 20 | ||||
| -rw-r--r-- | fs/btrfs/inode.c | 22 |
3 files changed, 22 insertions, 21 deletions
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index e9c2f8895eab..a9496644f47d 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -3641,6 +3641,7 @@ int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans, int __get_raid_index(u64 flags); int btrfs_start_write_no_snapshoting(struct btrfs_root *root); void btrfs_end_write_no_snapshoting(struct btrfs_root *root); +void btrfs_wait_for_snapshot_creation(struct btrfs_root *root); void check_system_chunk(struct btrfs_trans_handle *trans, struct btrfs_root *root, const u64 type); diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index abcffa4b8231..8e8079808728 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -10817,3 +10817,23 @@ int btrfs_start_write_no_snapshoting(struct btrfs_root *root) } return 1; } + +static int wait_snapshoting_atomic_t(atomic_t *a) +{ + schedule(); + return 0; +} + +void btrfs_wait_for_snapshot_creation(struct btrfs_root *root) +{ + while (true) { + int ret; + + ret = btrfs_start_write_no_snapshoting(root); + if (ret) + break; + wait_on_atomic_t(&root->will_be_snapshoted, + wait_snapshoting_atomic_t, + TASK_UNINTERRUPTIBLE); + } +} diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 8ad9e2200442..b8bb7591ff9f 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -4871,26 +4871,6 @@ next: return err; } -static int wait_snapshoting_atomic_t(atomic_t *a) -{ - schedule(); - return 0; -} - -static void wait_for_snapshot_creation(struct btrfs_root *root) -{ - while (true) { - int ret; - - ret = btrfs_start_write_no_snapshoting(root); - if (ret) - break; - wait_on_atomic_t(&root->will_be_snapshoted, - wait_snapshoting_atomic_t, - TASK_UNINTERRUPTIBLE); - } -} - static int btrfs_setsize(struct inode *inode, struct iattr *attr) { struct btrfs_root *root = BTRFS_I(inode)->root; @@ -4922,7 +4902,7 @@ static int btrfs_setsize(struct inode *inode, struct iattr *attr) * truncation, it must capture all writes that happened before * this truncation. */ - wait_for_snapshot_creation(root); + btrfs_wait_for_snapshot_creation(root); ret = btrfs_cont_expand(inode, oldsize, newsize); if (ret) { btrfs_end_write_no_snapshoting(root); |