diff options
Diffstat (limited to 'fs/btrfs/locking.c')
| -rw-r--r-- | fs/btrfs/locking.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/fs/btrfs/locking.c b/fs/btrfs/locking.c index 028513153ac4..f58606887859 100644 --- a/fs/btrfs/locking.c +++ b/fs/btrfs/locking.c @@ -316,3 +316,29 @@ void btrfs_tree_unlock(struct extent_buffer *eb) write_unlock(&eb->lock); } } + +/* + * Set all locked nodes in the path to blocking locks. This should be done + * before scheduling + */ +void btrfs_set_path_blocking(struct btrfs_path *p) +{ + int i; + + for (i = 0; i < BTRFS_MAX_LEVEL; i++) { + if (!p->nodes[i] || !p->locks[i]) + continue; + /* + * If we currently have a spinning reader or writer lock this + * will bump the count of blocking holders and drop the + * spinlock. + */ + if (p->locks[i] == BTRFS_READ_LOCK) { + btrfs_set_lock_blocking_read(p->nodes[i]); + p->locks[i] = BTRFS_READ_LOCK_BLOCKING; + } else if (p->locks[i] == BTRFS_WRITE_LOCK) { + btrfs_set_lock_blocking_write(p->nodes[i]); + p->locks[i] = BTRFS_WRITE_LOCK_BLOCKING; + } + } +} |