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path: root/fs/btrfs/scrub.c
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Diffstat (limited to 'fs/btrfs/scrub.c')
-rw-r--r--fs/btrfs/scrub.c50
1 files changed, 47 insertions, 3 deletions
diff --git a/fs/btrfs/scrub.c b/fs/btrfs/scrub.c
index 46d847f66e4b..70427ef66b04 100644
--- a/fs/btrfs/scrub.c
+++ b/fs/btrfs/scrub.c
@@ -3582,6 +3582,46 @@ int scrub_enumerate_chunks(struct scrub_ctx *sctx,
*/
scrub_pause_on(fs_info);
ret = btrfs_inc_block_group_ro(root, cache);
+ if (!ret && is_dev_replace) {
+ /*
+ * If we are doing a device replace wait for any tasks
+ * that started dellaloc right before we set the block
+ * group to RO mode, as they might have just allocated
+ * an extent from it or decided they could do a nocow
+ * write. And if any such tasks did that, wait for their
+ * ordered extents to complete and then commit the
+ * current transaction, so that we can later see the new
+ * extent items in the extent tree - the ordered extents
+ * create delayed data references (for cow writes) when
+ * they complete, which will be run and insert the
+ * corresponding extent items into the extent tree when
+ * we commit the transaction they used when running
+ * inode.c:btrfs_finish_ordered_io(). We later use
+ * the commit root of the extent tree to find extents
+ * to copy from the srcdev into the tgtdev, and we don't
+ * want to miss any new extents.
+ */
+ btrfs_wait_block_group_reservations(cache);
+ btrfs_wait_nocow_writers(cache);
+ ret = btrfs_wait_ordered_roots(fs_info, -1,
+ cache->key.objectid,
+ cache->key.offset);
+ if (ret > 0) {
+ struct btrfs_trans_handle *trans;
+
+ trans = btrfs_join_transaction(root);
+ if (IS_ERR(trans))
+ ret = PTR_ERR(trans);
+ else
+ ret = btrfs_commit_transaction(trans,
+ root);
+ if (ret) {
+ scrub_pause_off(fs_info);
+ btrfs_put_block_group(cache);
+ break;
+ }
+ }
+ }
scrub_pause_off(fs_info);
if (ret == 0) {
@@ -3602,9 +3642,11 @@ int scrub_enumerate_chunks(struct scrub_ctx *sctx,
break;
}
+ btrfs_dev_replace_lock(&fs_info->dev_replace, 1);
dev_replace->cursor_right = found_key.offset + length;
dev_replace->cursor_left = found_key.offset;
dev_replace->item_needs_writeback = 1;
+ btrfs_dev_replace_unlock(&fs_info->dev_replace, 1);
ret = scrub_chunk(sctx, scrub_dev, chunk_offset, length,
found_key.offset, cache, is_dev_replace);
@@ -3640,6 +3682,11 @@ int scrub_enumerate_chunks(struct scrub_ctx *sctx,
scrub_pause_off(fs_info);
+ btrfs_dev_replace_lock(&fs_info->dev_replace, 1);
+ dev_replace->cursor_left = dev_replace->cursor_right;
+ dev_replace->item_needs_writeback = 1;
+ btrfs_dev_replace_unlock(&fs_info->dev_replace, 1);
+
if (ro_set)
btrfs_dec_block_group_ro(root, cache);
@@ -3677,9 +3724,6 @@ int scrub_enumerate_chunks(struct scrub_ctx *sctx,
ret = -ENOMEM;
break;
}
-
- 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);