linux-kernel - [PATCH 1/3] fs: Export in_group_or

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Date: Thu, 20 Jun 2024 11:23:33 +0800
From: Youling Tang <youling.tang@...ux.dev>
To: Alexander Viro <viro@...iv.linux.org.uk>,
	Christian Brauner <brauner@...nel.org>,
	Jaegeuk Kim <jaegeuk@...nel.org>,
	Chao Yu <chao@...nel.org>,
	Miklos Szeredi <miklos@...redi.hu>
Cc: Jan Kara <jack@...e.cz>,
	linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-f2fs-devel@...ts.sourceforge.net,
	youling.tang@...ux.dev,
	Youling Tang <tangyouling@...inos.cn>
Subject: [PATCH 1/3] fs: Export in_group_or_capable()

From: Youling Tang <tangyouling@...inos.cn>

Export in_group_or_capable() as a VFS helper function.

Signed-off-by: Youling Tang <tangyouling@...inos.cn>
---
 fs/attr.c          | 2 --
 fs/inode.c         | 1 +
 include/linux/fs.h | 2 ++
 3 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/fs/attr.c b/fs/attr.c
index 960a310581eb..825007d5cda4 100644
--- a/fs/attr.c
+++ b/fs/attr.c
@@ -17,8 +17,6 @@
 #include <linux/filelock.h>
 #include <linux/security.h>
 
-#include "internal.h"
-
 /**
  * setattr_should_drop_sgid - determine whether the setgid bit needs to be
  *                            removed
diff --git a/fs/inode.c b/fs/inode.c
index 3a41f83a4ba5..e0815acc5abb 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -2538,6 +2538,7 @@ bool in_group_or_capable(struct mnt_idmap *idmap,
 		return true;
 	return false;
 }
+EXPORT_SYMBOL(in_group_or_capable);
 
 /**
  * mode_strip_sgid - handle the sgid bit for non-directories
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 0283cf366c2a..c375a4af7b11 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1926,6 +1926,8 @@ void inode_init_owner(struct mnt_idmap *idmap, struct inode *inode,
 extern bool may_open_dev(const struct path *path);
 umode_t mode_strip_sgid(struct mnt_idmap *idmap,
 			const struct inode *dir, umode_t mode);
+bool in_group_or_capable(struct mnt_idmap *idmap,
+			 const struct inode *inode, vfsgid_t vfsgid);
 
 /*
  * This is the "filldir" function type, used by readdir() to let
-- 
2.34.1