diff options
Diffstat (limited to 'fs/btrfs/block-rsv.c')
| -rw-r--r-- | fs/btrfs/block-rsv.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/fs/btrfs/block-rsv.c b/fs/btrfs/block-rsv.c index ac18c43fadad..6279d200cf83 100644 --- a/fs/btrfs/block-rsv.c +++ b/fs/btrfs/block-rsv.c @@ -541,3 +541,22 @@ try_reserve: return ERR_PTR(ret); } + +int btrfs_check_trunc_cache_free_space(struct btrfs_fs_info *fs_info, + struct btrfs_block_rsv *rsv) +{ + u64 needed_bytes; + int ret; + + /* 1 for slack space, 1 for updating the inode */ + needed_bytes = btrfs_calc_insert_metadata_size(fs_info, 1) + + btrfs_calc_metadata_size(fs_info, 1); + + spin_lock(&rsv->lock); + if (rsv->reserved < needed_bytes) + ret = -ENOSPC; + else + ret = 0; + spin_unlock(&rsv->lock); + return ret; +} |