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-rw-r--r--fs/btrfs/reada.c30
1 files changed, 30 insertions, 0 deletions
diff --git a/fs/btrfs/reada.c b/fs/btrfs/reada.c
index bb5bd49573b4..ee6f60547a8d 100644
--- a/fs/btrfs/reada.c
+++ b/fs/btrfs/reada.c
@@ -14,6 +14,7 @@
#include "disk-io.h"
#include "transaction.h"
#include "dev-replace.h"
+#include "block-group.h"
#undef DEBUG
@@ -638,6 +639,35 @@ static int reada_pick_zone(struct btrfs_device *dev)
return 1;
}
+static int reada_tree_block_flagged(struct btrfs_fs_info *fs_info, u64 bytenr,
+ int mirror_num, struct extent_buffer **eb)
+{
+ struct extent_buffer *buf = NULL;
+ int ret;
+
+ buf = btrfs_find_create_tree_block(fs_info, bytenr);
+ if (IS_ERR(buf))
+ return 0;
+
+ set_bit(EXTENT_BUFFER_READAHEAD, &buf->bflags);
+
+ ret = read_extent_buffer_pages(buf, WAIT_PAGE_LOCK, mirror_num);
+ if (ret) {
+ free_extent_buffer_stale(buf);
+ return ret;
+ }
+
+ if (test_bit(EXTENT_BUFFER_CORRUPT, &buf->bflags)) {
+ free_extent_buffer_stale(buf);
+ return -EIO;
+ } else if (extent_buffer_uptodate(buf)) {
+ *eb = buf;
+ } else {
+ free_extent_buffer(buf);
+ }
+ return 0;
+}
+
static int reada_start_machine_dev(struct btrfs_device *dev)
{
struct btrfs_fs_info *fs_info = dev->fs_info;