linux-kernel - [PATCH 04/14] VFS: Make get_filesystem() return the affected filesystem [ver #2]

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <149451122825.4599.4321100319755096089.stgit@warthog.procyon.org.uk>
Date:   Thu, 11 May 2017 15:00:28 +0100
From:   David Howells <dhowells@...hat.com>
To:     mszeredi@...hat.com, viro@...iv.linux.org.uk, jlayton@...hat.com
Cc:     dhowells@...hat.com, linux-fsdevel@...r.kernel.org,
        linux-nfs@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 04/14] VFS: Make get_filesystem() return the affected
 filesystem [ver #2]

Make get_filesystem() return a pointer to the filesystem on which it just
got a ref.

Suggested-by: Rasmus Villemoes <linux@...musvillemoes.dk>
Signed-off-by: David Howells <dhowells@...hat.com>
---

 fs/filesystems.c   |    3 ++-
 include/linux/fs.h |    2 +-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/fs/filesystems.c b/fs/filesystems.c
index cac75547d35c..591e52d23ed4 100644
--- a/fs/filesystems.c
+++ b/fs/filesystems.c
@@ -33,9 +33,10 @@ static struct file_system_type *file_systems;
 static DEFINE_RWLOCK(file_systems_lock);
 
 /* WARNING: This can be used only if we _already_ own a reference */
-void get_filesystem(struct file_system_type *fs)
+struct file_system_type *get_filesystem(struct file_system_type *fs)
 {
 	__module_get(fs->owner);
+	return fs;
 }
 
 void put_filesystem(struct file_system_type *fs)
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 30e5c14bd743..45ac992133fc 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -2953,7 +2953,7 @@ extern int generic_block_fiemap(struct inode *inode,
 				struct fiemap_extent_info *fieinfo, u64 start,
 				u64 len, get_block_t *get_block);
 
-extern void get_filesystem(struct file_system_type *fs);
+extern struct file_system_type *get_filesystem(struct file_system_type *fs);
 extern void put_filesystem(struct file_system_type *fs);
 extern struct file_system_type *get_fs_type(const char *name);
 extern struct super_block *get_super(struct block_device *);