From: Vivek Goyal <vgoyal@redhat.com>
Date: Wed, 5 Feb 2020 13:15:46 +0000 (-0500)
Subject: fuse: Support RENAME_WHITEOUT flag
X-Git-Tag: v5.6-rc1~25^2~2
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=519525fa47b5a8155f0b203e49a3a6a2319f75ae;p=thirdparty%2Fkernel%2Flinux.git

fuse: Support RENAME_WHITEOUT flag

Allow fuse to pass RENAME_WHITEOUT to fuse server.  Overlayfs on top of
virtiofs uses RENAME_WHITEOUT.

Without this patch renaming a directory in overlayfs (dir is on lower)
fails with -EINVAL. With this patch it works.

Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
---

diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c
index ee190119f45cc..de1e2fde60bd4 100644
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -818,7 +818,7 @@ static int fuse_rename2(struct inode *olddir, struct dentry *oldent,
 	struct fuse_conn *fc = get_fuse_conn(olddir);
 	int err;
 
-	if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE))
+	if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE | RENAME_WHITEOUT))
 		return -EINVAL;
 
 	if (flags) {