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authorJosef Bacik <josef@redhat.com>2011-11-17 11:34:31 -0500
committerChris Mason <chris.mason@oracle.com>2011-11-20 07:42:17 -0500
commit4d479cf010d56ec9c54f3099992d039918f1296b (patch)
treeefed635e7dc1d53c9a63787846912df1667e8a16 /fs
parentf7d61dcd6873c49bcc42be2caa2af1c2511aa915 (diff)
Btrfs: sectorsize align offsets in fiemap
We've been hitting BUG()'s in btrfs_cont_expand and btrfs_fallocate and anywhere else that calls btrfs_get_extent while running xfstests 13 in a loop. This is because fiemap is calling btrfs_get_extent with non-sectorsize aligned offsets, which will end up adding mappings that are not sectorsize aligned, which will cause problems in some cases for subsequent calls to btrfs_get_extent for similar areas that are sectorsize aligned. With this patch I ran xfstests 13 in a loop for a couple of hours and didn't hit the problem that I could previously hit in at most 20 minutes. Thanks, Signed-off-by: Josef Bacik <josef@redhat.com>
Diffstat (limited to 'fs')
-rw-r--r--fs/btrfs/extent_io.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index a877b8b212eb..9472d3de5e52 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -3366,6 +3366,9 @@ int extent_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
return -ENOMEM;
path->leave_spinning = 1;
+ start = ALIGN(start, BTRFS_I(inode)->root->sectorsize);
+ len = ALIGN(len, BTRFS_I(inode)->root->sectorsize);
+
/*
* lookup the last file extent. We're not using i_size here
* because there might be preallocation past i_size
@@ -3413,7 +3416,7 @@ int extent_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
lock_extent_bits(&BTRFS_I(inode)->io_tree, start, start + len, 0,
&cached_state, GFP_NOFS);
- em = get_extent_skip_holes(inode, off, last_for_get_extent,
+ em = get_extent_skip_holes(inode, start, last_for_get_extent,
get_extent);
if (!em)
goto out;