[PATCH] Btrfs-progs: fix free space cache checks

[PATCH] Btrfs-progs: fix free space cache checks

[Josef Bacik]

This fixes two bugs with the free space cache checker.  First is we apparently
always use root->sectorsize for our unit in the kernel so we have to do that in
progs otherwise bitmaps turn out to not look right if we have leafsize !=
sectorsize.  The second is a small issue if we had skinny metadata extents set,
we wouldn't advance last properly because we unconditionally use key.offset
instead of root->leafsize.  Thanks,

Signed-off-by: Josef Bacik <jbacik@fusionio.com>
---
 cmds-check.c |   16 ++++++----------
 1 files changed, 6 insertions(+), 10 deletions(-)

diff --git a/cmds-check.c b/cmds-check.c
index 7bb68ce..288b36e 100644
--- a/cmds-check.c
+++ b/cmds-check.c
@@ -2853,7 +2853,10 @@ static int verify_space_cache(struct btrfs_root *root,
 		}
 
 		if (last == key.objectid) {
-			last = key.objectid + key.offset;
+			if (key.type == BTRFS_EXTENT_ITEM_KEY)
+				last = key.objectid + key.offset;
+			else
+				last = key.objectid + root->leafsize;
 			path->slots[0]++;
 			continue;
 		}
@@ -2906,15 +2909,8 @@ static int check_space_cache(struct btrfs_root *root)
 
 		start = cache->key.objectid + cache->key.offset;
 		if (!cache->free_space_ctl) {
-			int sectorsize;
-
-			if (cache->flags & (BTRFS_BLOCK_GROUP_METADATA |
-					    BTRFS_BLOCK_GROUP_SYSTEM))
-				sectorsize = root->leafsize;
-			else
-				sectorsize = root->sectorsize;
-
-			if (btrfs_init_free_space_ctl(cache, sectorsize)) {
+			if (btrfs_init_free_space_ctl(cache,
+						      root->sectorsize)) {
 				ret = -ENOMEM;
 				break;
 			}
-- 
1.7.7.6