Introduce new function, scrub_one_block_group(), to scrub a block group.
For Single/DUP/RAID0/RAID1/RAID10, we use old mirror number based
map_block, and check extent by extent.
For parity based profile (RAID5/6), we use new map_block_v2() and check
full stripe by full stripe.
Signed-off-by: Qu Wenruo <quwen...@cn.fujitsu.com>
---
check/scrub.c | 85 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 85 insertions(+)
diff --git a/check/scrub.c b/check/scrub.c
index 1c8e440..94f8744 100644
--- a/check/scrub.c
+++ b/check/scrub.c
@@ -689,3 +689,88 @@ out:
free(map_block);
return ret;
}
+
+static int scrub_one_block_group(struct btrfs_fs_info *fs_info,
+ struct btrfs_scrub_progress *scrub_ctx,
+ struct btrfs_block_group_cache *bg_cache)
+{
+ struct btrfs_root *extent_root = fs_info->extent_root;
+ struct btrfs_path *path;
+ struct btrfs_key key;
+ u64 bg_start = bg_cache->key.objectid;
+ u64 bg_len = bg_cache->key.offset;
+ u64 cur;
+ u64 next;
+ int ret;
+
+ if (bg_cache->flags &
+ (BTRFS_BLOCK_GROUP_RAID5 | BTRFS_BLOCK_GROUP_RAID6)) {
+ /* RAID5/6 check full stripe by full stripe */
+ cur = bg_cache->key.objectid;
+
+ while (cur < bg_start + bg_len) {
+ ret = scrub_one_full_stripe(fs_info, scrub_ctx, cur,
+ &next);
+ /* Ignore any non-fatal error */
+ if (ret < 0 && ret != -EIO) {
+ error("fatal error happens checking one full
stripe at bytenr: %llu: %s",
+ cur, strerror(-ret));
+ return ret;
+ }
+ cur = next;
+ }
+ /* Ignore any -EIO error, such error will be reported at last */
+ return 0;
+ }
+ /* None parity based profile, check extent by extent */
+ key.objectid = bg_start;
+ key.type = 0;
+ key.offset = 0;
+
+ path = btrfs_alloc_path();
+ if (!path)
+ return -ENOMEM;
+ ret = btrfs_search_slot(NULL, extent_root, &key, path, 0, 0);
+ if (ret < 0)
+ goto out;
+ while (1) {
+ struct extent_buffer *eb = path->nodes[0];
+ int slot = path->slots[0];
+ u64 extent_start;
+ u64 extent_len;
+
+ btrfs_item_key_to_cpu(eb, &key, slot);
+ if (key.objectid >= bg_start + bg_len)
+ break;
+ if (key.type != BTRFS_EXTENT_ITEM_KEY &&
+ key.type != BTRFS_METADATA_ITEM_KEY)
+ goto next;
+
+ extent_start = key.objectid;
+ if (key.type == BTRFS_METADATA_ITEM_KEY)
+ extent_len = extent_root->nodesize;
+ else
+ extent_len = key.offset;
+
+ ret = scrub_one_extent(fs_info, scrub_ctx, path, extent_start,
+ extent_len, 1);
+ if (ret < 0 && ret != -EIO) {
+ error("fatal error checking extent bytenr %llu len
%llu: %s",
+ extent_start, extent_len, strerror(-ret));
+ goto out;
+ }
+ ret = 0;
+next:
+ ret = btrfs_next_extent_item(extent_root, path, bg_start +
+ bg_len);
+ if (ret < 0)
+ goto out;
+ if (ret > 0) {
+ ret = 0;
+ break;
+ }
+ }
+out:
+ btrfs_free_path(path);
+ return ret;
+}
--
2.10.0
--
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