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Btrfs: Fix starting search offset inside btrfs_drop_extents
btrfs_drop_extents will drop paths and search again when it needs to force COW of higher nodes. It was using the key it found during the last search as the offset for the next search. But, this wasn't always correct. The key could be from before our desired range, and because we're dropping the path, it is possible for file's items to change while we do the search again. The fix here is to make sure we don't search for something smaller than the offset btrfs_drop_extents was called with. Signed-off-by: Chris Mason <chris.mason@oracle.com>
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1 changed files with 1 additions and 1 deletions
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@ -436,7 +436,7 @@ int noinline btrfs_drop_extents(struct btrfs_trans_handle *trans,
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goto out;
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}
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if (recow) {
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search_start = key.offset;
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search_start = max(key.offset, start);
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continue;
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}
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if (btrfs_key_type(&key) == BTRFS_EXTENT_DATA_KEY) {
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