linux-kernel - [PATCH 36/38] vfs: Convert selinuxfs to fs

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Date:   Thu, 14 Mar 2019 16:13:43 +0000
From:   David Howells <dhowells@...hat.com>
To:     viro@...iv.linux.org.uk
Cc:     Paul Moore <paul@...l-moore.com>,
        Stephen Smalley <sds@...ho.nsa.gov>,
        Eric Paris <eparis@...isplace.org>, selinux@...r.kernel.org,
        linux-security-module@...r.kernel.org, dhowells@...hat.com,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 36/38] vfs: Convert selinuxfs to fs_context

Signed-off-by: David Howells <dhowells@...hat.com>
cc: Paul Moore <paul@...l-moore.com>
cc: Stephen Smalley <sds@...ho.nsa.gov>
cc: Eric Paris <eparis@...isplace.org>
cc: selinux@...r.kernel.org
cc: linux-security-module@...r.kernel.org
---

 security/selinux/selinuxfs.c |   20 +++++++++++++++-----
 1 file changed, 15 insertions(+), 5 deletions(-)

diff --git a/security/selinux/selinuxfs.c b/security/selinux/selinuxfs.c
index 145ee62f205a..ccfe86dfa784 100644
--- a/security/selinux/selinuxfs.c
+++ b/security/selinux/selinuxfs.c
@@ -19,6 +19,7 @@
 #include <linux/slab.h>
 #include <linux/vmalloc.h>
 #include <linux/fs.h>
+#include <linux/fs_context.h>
 #include <linux/mount.h>
 #include <linux/mutex.h>
 #include <linux/init.h>
@@ -1893,7 +1894,7 @@ static struct dentry *sel_make_dir(struct dentry *dir, const char *name,
 
 #define NULL_FILE_NAME "null"
 
-static int sel_fill_super(struct super_block *sb, void *data, int silent)
+static int sel_fill_super(struct super_block *sb, struct fs_context *fc)
 {
 	struct selinux_fs_info *fsi;
 	int ret;
@@ -2009,10 +2010,19 @@ static int sel_fill_super(struct super_block *sb, void *data, int silent)
 	return ret;
 }
 
-static struct dentry *sel_mount(struct file_system_type *fs_type,
-		      int flags, const char *dev_name, void *data)
+static int sel_get_tree(struct fs_context *fc)
 {
-	return mount_single(fs_type, flags, data, sel_fill_super);
+	return vfs_get_super(fc, vfs_get_single_super, sel_fill_super);
+}
+
+static const struct fs_context_operations sel_context_ops = {
+	.get_tree	= sel_get_tree,
+};
+
+static int sel_init_fs_context(struct fs_context *fc)
+{
+	fc->ops = &sel_context_ops;
+	return 0;
 }
 
 static void sel_kill_sb(struct super_block *sb)
@@ -2023,7 +2033,7 @@ static void sel_kill_sb(struct super_block *sb)
 
 static struct file_system_type sel_fs_type = {
 	.name		= "selinuxfs",
-	.mount		= sel_mount,
+	.init_fs_context = sel_init_fs_context,
 	.kill_sb	= sel_kill_sb,
 };