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Btrfs: EIO when we fail to read tree roots

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If we just get a plain IO error when we read tree roots, the code
wasn't properly sending that error up the chain.  This allowed mounts to
continue when they should failed, and allowed operations
on partially setup root structs.  The end result was usually oopsen
on spinlocks that hadn't been spun up correctly.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason 2010-12-13 14:47:58 -05:00
parent 3dd1462e82
commit 68433b73b1
1 changed files with 4 additions and 1 deletions
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5
fs/btrfs/disk-io.c
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@ -1007,7 +1007,10 @@ static int find_and_setup_root(struct btrfs_root *tree_root,
blocksize = btrfs_level_size(root, btrfs_root_level(&root->root_item));
root->node = read_tree_block(root, btrfs_root_bytenr(&root->root_item),
blocksize, generation);
BUG_ON(!root->node);
if (!root->node || !btrfs_buffer_uptodate(root->node, generation)) {
free_extent_buffer(root->node);
return -EIO;
}
root->commit_root = btrfs_root_node(root);
return 0;
}