linux-kernel - [PATCH 09/13] mqueue: don't ignore options

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Date:   Wed, 19 Jun 2019 14:30:15 +0200
From:   Miklos Szeredi <mszeredi@...hat.com>
To:     David Howells <dhowells@...hat.com>
Cc:     Al Viro <viro@...iv.linux.org.uk>, Ian Kent <raven@...maw.net>,
        linux-api@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 09/13] mqueue: don't ignore options

The options "sync", "async", "dirsync", "lazytime", "nolazytime", "mand"
and "nomand" make no sense for the mqueue filesystem.  If these options are
supplied to fsconfig(FSCONFIG_SET_FLAG), then return -EINVAL instead of
silently ignoring the option.

Any implementation, such as mount(8) that needs to parse this option
without failing should simply ignore the return value from fsconfig().

Signed-off-by: Miklos Szeredi <mszeredi@...hat.com>
---
 ipc/mqueue.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ipc/mqueue.c b/ipc/mqueue.c
index 557aa887996a..1e8567c20d6a 100644
--- a/ipc/mqueue.c
+++ b/ipc/mqueue.c
@@ -1577,7 +1577,7 @@ static const struct super_operations mqueue_super_ops = {
 
 static const struct fs_context_operations mqueue_fs_context_ops = {
 	.free		= mqueue_fs_context_free,
-	.parse_param	= vfs_parse_sb_flag,
+	.parse_param	= vfs_parse_ro_rw,
 	.get_tree	= mqueue_get_tree,
 };
 
-- 
2.21.0