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authorWang Shilong <wangsl.fnst@cn.fujitsu.com>2014-05-29 17:59:57 +0800
committerDavid Sterba <dsterba@suse.cz>2014-10-10 18:11:32 +0200
commited1b086a3042c25655233ece41ff97b8ecc73a35 (patch)
tree9b84dbe23db01bdb533b23014acd4a9ac63268dc /disk-io.c
parent8d2abcb6cc50762536fe04c50bf262f1ccf3b9a3 (diff)
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Btrfs-progs: fsck: deal with corrupted csum root
If checksum root is corrupted, fsck will get segmentation. This is because if we fail to load checksum root, root's node is NULL which cause NULL pointer deferences later. To fix this problem, we just did something like extent tree rebuilding. Allocate a new one and clear uptodate flag. We will do sanity check before fsck going on. Signed-off-by: Wang Shilong <wangsl.fnst@cn.fujitsu.com> Signed-off-by: David Sterba <dsterba@suse.cz>
Diffstat (limited to 'disk-io.c')
-rw-r--r--disk-io.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/disk-io.c b/disk-io.c
index ed0b462..5a2c49d 100644
--- a/disk-io.c
+++ b/disk-io.c
@@ -909,6 +909,13 @@ int btrfs_setup_all_roots(struct btrfs_fs_info *fs_info, u64 root_tree_bytenr,
printk("Couldn't setup csum tree\n");
if (!(flags & OPEN_CTREE_PARTIAL))
return -EIO;
+ /* do the same thing as extent tree rebuilding */
+ fs_info->csum_root->node =
+ btrfs_find_create_tree_block(fs_info->extent_root, 0,
+ leafsize);
+ if (!fs_info->csum_root->node)
+ return -ENOMEM;
+ clear_extent_buffer_uptodate(NULL, fs_info->csum_root->node);
}
fs_info->csum_root->track_dirty = 1;