From f7039b1d5c32241f87a513e33120db36bf30264d Mon Sep 17 00:00:00 2001 From: Li Dongyang Date: Thu, 24 Mar 2011 10:24:28 +0000 Subject: Btrfs: add btrfs_trim_fs() to handle FITRIM We take an free extent out from allocator, trim it, then put it back, but before we trim the block group, we should make sure the block group is cached, so plus a little change to make cache_block_group() run without a transaction. Signed-off-by: Li Dongyang Signed-off-by: Chris Mason --- fs/btrfs/free-space-cache.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'fs/btrfs/free-space-cache.h') diff --git a/fs/btrfs/free-space-cache.h b/fs/btrfs/free-space-cache.h index e49ca5c321b..65c3b935289 100644 --- a/fs/btrfs/free-space-cache.h +++ b/fs/btrfs/free-space-cache.h @@ -68,4 +68,6 @@ u64 btrfs_alloc_from_cluster(struct btrfs_block_group_cache *block_group, int btrfs_return_cluster_to_free_space( struct btrfs_block_group_cache *block_group, struct btrfs_free_cluster *cluster); +int btrfs_trim_block_group(struct btrfs_block_group_cache *block_group, + u64 *trimmed, u64 start, u64 end, u64 minlen); #endif -- cgit v1.2.3-70-g09d2