diff options
author | Yan, Zheng <zheng.yan@oracle.com> | 2009-11-26 04:31:11 -0500 |
---|---|---|
committer | Chris Mason <chris.mason@oracle.com> | 2009-12-17 12:33:36 -0500 |
commit | 06b2331f8333ec6edf41662757ce8882cc1747d5 (patch) | |
tree | 9b8316a84e2cb5fa5ed4d16cdbfecd965ed7870c /fs/btrfs | |
parent | 86b9f2eca5e0984145e3c7698a7cd6dd65c2a93f (diff) |
Btrfs: don't add extent 0 to the free space cache v2
If block group 0 is completely free, btrfs_read_block_groups will
add extent [0, BTRFS_SUPER_INFO_OFFSET) to the free space cache.
Signed-off-by: Yan Zheng <zheng.yan@oracle.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs')
-rw-r--r-- | fs/btrfs/extent-tree.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index 44d7a322ec28..39761ca07f15 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c | |||
@@ -195,6 +195,14 @@ static int exclude_super_stripes(struct btrfs_root *root, | |||
195 | int stripe_len; | 195 | int stripe_len; |
196 | int i, nr, ret; | 196 | int i, nr, ret; |
197 | 197 | ||
198 | if (cache->key.objectid < BTRFS_SUPER_INFO_OFFSET) { | ||
199 | stripe_len = BTRFS_SUPER_INFO_OFFSET - cache->key.objectid; | ||
200 | cache->bytes_super += stripe_len; | ||
201 | ret = add_excluded_extent(root, cache->key.objectid, | ||
202 | stripe_len); | ||
203 | BUG_ON(ret); | ||
204 | } | ||
205 | |||
198 | for (i = 0; i < BTRFS_SUPER_MIRROR_MAX; i++) { | 206 | for (i = 0; i < BTRFS_SUPER_MIRROR_MAX; i++) { |
199 | bytenr = btrfs_sb_offset(i); | 207 | bytenr = btrfs_sb_offset(i); |
200 | ret = btrfs_rmap_block(&root->fs_info->mapping_tree, | 208 | ret = btrfs_rmap_block(&root->fs_info->mapping_tree, |
@@ -255,7 +263,7 @@ static u64 add_new_free_space(struct btrfs_block_group_cache *block_group, | |||
255 | if (ret) | 263 | if (ret) |
256 | break; | 264 | break; |
257 | 265 | ||
258 | if (extent_start == start) { | 266 | if (extent_start <= start) { |
259 | start = extent_end + 1; | 267 | start = extent_end + 1; |
260 | } else if (extent_start > start && extent_start < end) { | 268 | } else if (extent_start > start && extent_start < end) { |
261 | size = extent_start - start; | 269 | size = extent_start - start; |