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Btrfs: deal with free space cache errors while replaying log

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So everybody who got hit by my fsync bug will still continue to hit this
BUG_ON() in the free space cache, which is pretty heavy handed.  So I took a
file system that had this bug and fixed up all the BUG_ON()'s and leaks that
popped up when I tried to mount a broken file system like this.  With this patch
we just fail to mount instead of panicing.  Thanks,

Signed-off-by: Josef Bacik <jbacik@fusionio.com>
This commit is contained in:
Josef Bacik
2013-04-25 15:55:30 -04:00
parent 3d7b5a2882
commit b50c6e250e
3 changed files with 60 additions and 33 deletions
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4
fs/btrfs/free-space-cache.c
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@@ -1567,7 +1567,8 @@ again:
search_bytes = ctl->unit;
search_bytes = min(search_bytes, end - search_start + 1);
ret = search_bitmap(ctl, bitmap_info, &search_start, &search_bytes);
BUG_ON(ret < 0 || search_start != *offset);
if (ret < 0 || search_start != *offset)
return -EINVAL;
/* We may have found more bits than what we need */
search_bytes = min(search_bytes, *bytes);
@@ -1973,7 +1974,6 @@ again:
re_search = true;
goto again;
}
BUG_ON(ret); /* logic error */
out_lock:
spin_unlock(&ctl->tree_lock);
out: