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-rw-r--r--fs/btrfs/send.c18
1 files changed, 13 insertions, 5 deletions
diff --git a/fs/btrfs/send.c b/fs/btrfs/send.c
index 27e92594a81b..cbf4909f5cd9 100644
--- a/fs/btrfs/send.c
+++ b/fs/btrfs/send.c
@@ -1248,12 +1248,20 @@ static int __iterate_backrefs(u64 ino, u64 offset, u64 root, void *ctx_)
*/
if (found->root == bctx->sctx->send_root) {
/*
- * TODO for the moment we don't accept clones from the inode
- * that is currently send. We may change this when
- * BTRFS_IOC_CLONE_RANGE supports cloning from and to the same
- * file.
+ * If the source inode was not yet processed we can't issue a
+ * clone operation, as the source extent does not exist yet at
+ * the destination of the stream.
*/
- if (ino >= bctx->cur_objectid)
+ if (ino > bctx->cur_objectid)
+ return 0;
+ /*
+ * We clone from the inode currently being sent as long as the
+ * source extent is already processed, otherwise we could try
+ * to clone from an extent that does not exist yet at the
+ * destination of the stream.
+ */
+ if (ino == bctx->cur_objectid &&
+ offset >= bctx->sctx->cur_inode_next_write_offset)
return 0;
}