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authorJosef Bacik <josef@redhat.com>2010-07-02 20:14:14 +0400
committerChris Mason <chris.mason@oracle.com>2010-10-29 17:26:29 +0400
commit0cb59c9953171e9adf6da8142a5c85ceb77bb60d (patch)
treef72af47fa18815491814290a1b4907082bd9316d /fs/btrfs/free-space-cache.h
parent0af3d00bad38d3bb9912a60928ad0669f17bdb76 (diff)
downloadlinux-0cb59c9953171e9adf6da8142a5c85ceb77bb60d.tar.xz
Btrfs: write out free space cache
This is a simple bit, just dump the free space cache out to our preallocated inode when we're writing out dirty block groups. There are a bunch of changes in inode.c in order to account for special cases. Mostly when we're doing the writeout we're holding trans_mutex, so we need to use the nolock transacation functions. Also we can't do asynchronous completions since the async thread could be blocked on already completed IO waiting for the transaction lock. This has been tested with xfstests and btrfs filesystem balance, as well as my ENOSPC tests. Thanks, Signed-off-by: Josef Bacik <josef@redhat.com>
Diffstat (limited to 'fs/btrfs/free-space-cache.h')
-rw-r--r--fs/btrfs/free-space-cache.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/fs/btrfs/free-space-cache.h b/fs/btrfs/free-space-cache.h
index 45be29e5f01e..189f740bd3c0 100644
--- a/fs/btrfs/free-space-cache.h
+++ b/fs/btrfs/free-space-cache.h
@@ -34,10 +34,15 @@ int create_free_space_inode(struct btrfs_root *root,
struct btrfs_trans_handle *trans,
struct btrfs_block_group_cache *block_group,
struct btrfs_path *path);
+
int btrfs_truncate_free_space_cache(struct btrfs_root *root,
struct btrfs_trans_handle *trans,
struct btrfs_path *path,
struct inode *inode);
+int btrfs_write_out_cache(struct btrfs_root *root,
+ struct btrfs_trans_handle *trans,
+ struct btrfs_block_group_cache *block_group,
+ struct btrfs_path *path);
int btrfs_add_free_space(struct btrfs_block_group_cache *block_group,
u64 bytenr, u64 size);
int btrfs_remove_free_space(struct btrfs_block_group_cache *block_group,