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Btrfs: find_free_dev_extent doesn't handle holes at the start of the device

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find_free_dev_extent does not properly handle the case where
the device is not complete free, and there is a free extent
at the beginning of the device.

Signed-off-by: Yan Zheng <zheng.yan@oracle.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Yan Zheng 2009-07-24 11:06:53 -04:00 committed by Chris Mason
parent 20736abaa3
commit 1fcbac581b
1 changed files with 7 additions and 3 deletions
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10
fs/btrfs/volumes.c
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@ -758,9 +758,13 @@ static noinline int find_free_dev_extent(struct btrfs_trans_handle *trans,
ret = btrfs_search_slot(trans, root, &key, path, 0, 0);
if (ret < 0)
goto error;
ret = btrfs_previous_item(root, path, 0, key.type);
if (ret < 0)
goto error;
if (ret > 0) {
ret = btrfs_previous_item(root, path, key.objectid, key.type);
if (ret < 0)
goto error;
if (ret > 0)
start_found = 1;
}
l = path->nodes[0];
btrfs_item_key_to_cpu(l, &key, path->slots[0]);
while (1) {