From ced96edc48ba455b0982c3aa64d3cc3bf2d0816a Mon Sep 17 00:00:00 2001 From: Qu Wenruo Date: Thu, 19 Jun 2014 10:42:51 +0800 Subject: [PATCH] btrfs: Skip scrubbing removed chunks to avoid -ENOENT. When run scrub with balance, sometimes -ENOENT will be returned, since in scrub_enumerate_chunks() will search dev_extent in *COMMIT_ROOT*, but btrfs_lookup_block_group() will search block group in *MEMORY*, so if a chunk is removed but not committed, -ENOENT will be returned. However, there is no need to stop scrubbing since other chunks may be scrubbed without problem. So this patch changes the behavior to skip removed chunks and continue to scrub the rest. Signed-off-by: Qu Wenruo Signed-off-by: Miao Xie Signed-off-by: Chris Mason --- fs/btrfs/scrub.c | 19 +++++++++---------- 1 file changed, 9 insertions(+), 10 deletions(-) diff --git a/fs/btrfs/scrub.c b/fs/btrfs/scrub.c index ac80188eec88..b6d198f5181e 100644 --- a/fs/btrfs/scrub.c +++ b/fs/btrfs/scrub.c @@ -2725,11 +2725,8 @@ int scrub_enumerate_chunks(struct scrub_ctx *sctx, dev_extent = btrfs_item_ptr(l, slot, struct btrfs_dev_extent); length = btrfs_dev_extent_length(l, dev_extent); - if (found_key.offset + length <= start) { - key.offset = found_key.offset + length; - btrfs_release_path(path); - continue; - } + if (found_key.offset + length <= start) + goto skip; chunk_tree = btrfs_dev_extent_chunk_tree(l, dev_extent); chunk_objectid = btrfs_dev_extent_chunk_objectid(l, dev_extent); @@ -2740,10 +2737,12 @@ int scrub_enumerate_chunks(struct scrub_ctx *sctx, * the chunk from going away while we scrub it */ cache = btrfs_lookup_block_group(fs_info, chunk_offset); - if (!cache) { - ret = -ENOENT; - break; - } + + /* some chunks are removed but not committed to disk yet, + * continue scrubbing */ + if (!cache) + goto skip; + dev_replace->cursor_right = found_key.offset + length; dev_replace->cursor_left = found_key.offset; dev_replace->item_needs_writeback = 1; @@ -2802,7 +2801,7 @@ int scrub_enumerate_chunks(struct scrub_ctx *sctx, dev_replace->cursor_left = dev_replace->cursor_right; dev_replace->item_needs_writeback = 1; - +skip: key.offset = found_key.offset + length; btrfs_release_path(path); } -- 2.30.2