diff options
| author | Li Zefan <lizf@cn.fujitsu.com> | 2011-04-20 10:33:24 +0800 |
|---|---|---|
| committer | Li Zefan <lizf@cn.fujitsu.com> | 2011-04-25 16:46:11 +0800 |
| commit | 82d5902d9c681be37ffa9d70482907f9f0b7ec1f (patch) | |
| tree | c9c99f0b60004ac14d09d277d3216667df09c32d /fs/btrfs/extent-tree.c | |
| parent | 33345d01522f8152f99dc84a3e7a1a45707f387f (diff) | |
Btrfs: Support reading/writing on disk free ino cache
This is similar to block group caching.
We dedicate a special inode in fs tree to save free ino cache.
At the very first time we create/delete a file after mount, the free ino
cache will be loaded from disk into memory. When the fs tree is commited,
the cache will be written back to disk.
To keep compatibility, we check the root generation against the generation
of the special inode when loading the cache, so the loading will fail
if the btrfs filesystem was mounted in an older kernel before.
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Diffstat (limited to 'fs/btrfs/extent-tree.c')
| -rw-r--r-- | fs/btrfs/extent-tree.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index a0e818cb0401..95ce8da63b28 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -3145,7 +3145,8 @@ int btrfs_check_data_free_space(struct inode *inode, u64 bytes) /* make sure bytes are sectorsize aligned */ bytes = (bytes + root->sectorsize - 1) & ~((u64)root->sectorsize - 1); - if (root == root->fs_info->tree_root) { + if (root == root->fs_info->tree_root || + BTRFS_I(inode)->location.objectid == BTRFS_FREE_INO_OBJECTID) { alloc_chunk = 0; committed = 1; } |