commit 8228e2c313194f13f1d1806ed5734a26c38d49ac
author Dmitry Kadashev <dkadashev@gmail.com> Thu Jul 08 13:34:42 2021 +0700
committer Jens Axboe <axboe@kernel.dk> Mon Aug 23 13:41:26 2021 -0600
tree 84d58d03dbd06a8258bed089f2f435cff4c63f38
parent da2d0cede330192879e8e16ddb3158aa76ba5ec2

namei: add getname_uflags()

There are a couple of places where we already open-code the (flags &
AT_EMPTY_PATH) check and io_uring will likely add another one in the
future.  Let's just add a simple helper getname_uflags() that handles
this directly and use it.

Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Christian Brauner <christian.brauner@ubuntu.com>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Link: https://lore.kernel.org/io-uring/20210415100815.edrn4a7cy26wkowe@wittgenstein/
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
Signed-off-by: Dmitry Kadashev <dkadashev@gmail.com>
Acked-by: Christian Brauner <christian.brauner@ubuntu.com>
Link: https://lore.kernel.org/r/20210708063447.3556403-7-dkadashev@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>

fs/namei.c

diff --git a/fs/namei.c b/fs/namei.c
index 522c35b..41f58da 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -204,6 +204,14 @@ getname_flags(const char __user *filename, int flags, int *empty)
 }
 
 struct filename *
+getname_uflags(const char __user *filename, int uflags)
+{
+	int flags = (uflags & AT_EMPTY_PATH) ? LOOKUP_EMPTY : 0;
+
+	return getname_flags(filename, flags, NULL);
+}
+
+struct filename *
 getname(const char __user * filename)
 {
 	return getname_flags(filename, 0, NULL);