[PATCH 5/5] Btrfs: incremental send, add gen check if has waiting_dir_move in the will_overwrite_ref

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From: Robbie Ko <robbieko@xxxxxxxxxxxx>

There a some case similar as before.
add check generation if has waiting_dir_move in the will_overwrite_ref

Signed-off-by: Robbie Ko <robbieko@xxxxxxxxxxxx>
---
 fs/btrfs/send.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/fs/btrfs/send.c b/fs/btrfs/send.c
index e090db2..92b7518 100644
--- a/fs/btrfs/send.c
+++ b/fs/btrfs/send.c
@@ -1858,6 +1858,7 @@ static int will_overwrite_ref(struct send_ctx *sctx, u64 dir, u64 dir_gen,
 	u64 gen;
 	u64 other_inode = 0;
 	u8 other_type = 0;
+	struct waiting_dir_move *dm = NULL;
 
 	if (!sctx->parent_root)
 		goto out;
@@ -1899,11 +1900,15 @@ static int will_overwrite_ref(struct send_ctx *sctx, u64 dir, u64 dir_gen,
 	 * overwrite anything at this point in time.
 	 */
 	if (other_inode > sctx->send_progress ||
-	    is_waiting_for_move(sctx, other_inode)) {
+		((dm = get_waiting_dir_move(sctx, other_inode)) != NULL)) {
 		ret = get_inode_info(sctx->parent_root, other_inode, NULL,
 				who_gen, NULL, NULL, NULL, NULL);
 		if (ret < 0)
 			goto out;
+		if (dm && dm->gen != *who_gen) {
+			ret = 0;
+			goto out;
+		}
 
 		ret = 1;
 		*who_ino = other_inode;
-- 
1.9.1

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