Btrfs: clear received_uuid field for new writable snapshots

[platform/adaptation/renesas_rcar/renesas_kernel.git] / fs / btrfs / transaction.c

diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
index de77458..258fceb 100644 (file)
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -1169,13 +1169,17 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans,
        memcpy(new_root_item->uuid, new_uuid.b, BTRFS_UUID_SIZE);
        memcpy(new_root_item->parent_uuid, root->root_item.uuid,
                        BTRFS_UUID_SIZE);
+       if (!(root_flags & BTRFS_ROOT_SUBVOL_RDONLY)) {
+               memset(new_root_item->received_uuid, 0,
+                      sizeof(new_root_item->received_uuid));
+               memset(&new_root_item->stime, 0, sizeof(new_root_item->stime));
+               memset(&new_root_item->rtime, 0, sizeof(new_root_item->rtime));
+               btrfs_set_root_stransid(new_root_item, 0);
+               btrfs_set_root_rtransid(new_root_item, 0);
+       }
        new_root_item->otime.sec = cpu_to_le64(cur_time.tv_sec);
        new_root_item->otime.nsec = cpu_to_le32(cur_time.tv_nsec);
        btrfs_set_root_otransid(new_root_item, trans->transid);
-       memset(&new_root_item->stime, 0, sizeof(new_root_item->stime));
-       memset(&new_root_item->rtime, 0, sizeof(new_root_item->rtime));
-       btrfs_set_root_stransid(new_root_item, 0);
-       btrfs_set_root_rtransid(new_root_item, 0);
 
        old = btrfs_lock_root_node(root);
        ret = btrfs_cow_block(trans, root, old, NULL, 0, &old);