From: Jiachen Zhang <zhangjiachen.jaycee@bytedance.com>
Date: Wed, 28 Sep 2022 20:19:34 +0800
Subject: fuse: always revalidate rename target dentry
Git-commit: ccc031e26afe60d2a5a3d93dabd9c978210825fb
Patch-mainline: v6.2-rc1
References: bsc#1211808

The previous commit df8629af2934 ("fuse: always revalidate if exclusive
create") ensures that the dentries are revalidated on O_EXCL creates.  This
commit complements it by also performing revalidation for rename target
dentries.  Otherwise, a rename target file that only exists in kernel
dentry cache but not in the filesystem will result in EEXIST if
RENAME_NOREPLACE flag is used.

Signed-off-by: Jiachen Zhang <zhangjiachen.jaycee@bytedance.com>
Signed-off-by: Zhang Tianci <zhangtianci.1997@bytedance.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Acked-by: Luís Henriques <lhenriques@suse.de>

---
 fs/fuse/dir.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c
index d092c7d75929..2c4b08a6ec81 100644
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -214,7 +214,7 @@ static int fuse_dentry_revalidate(struct dentry *entry, unsigned int flags)
 	if (inode && fuse_is_bad(inode))
 		goto invalid;
 	else if (time_before64(fuse_dentry_time(entry), get_jiffies_64()) ||
-		 (flags & (LOOKUP_EXCL | LOOKUP_REVAL))) {
+		 (flags & (LOOKUP_EXCL | LOOKUP_REVAL | LOOKUP_RENAME_TARGET))) {
 		struct fuse_entry_out outarg;
 		FUSE_ARGS(args);
 		struct fuse_forget_link *forget;