linux-kernel - [PATCH 34/38] vfs: Convert apparmorfs to fs

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Date:   Thu, 14 Mar 2019 16:13:28 +0000
From:   David Howells <dhowells@...hat.com>
To:     viro@...iv.linux.org.uk
Cc:     John Johansen <john.johansen@...onical.com>,
        apparmor@...ts.ubuntu.com, linux-security-module@...r.kernel.org,
        dhowells@...hat.com, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 34/38] vfs: Convert apparmorfs to fs_context

Signed-off-by: David Howells <dhowells@...hat.com>
cc: John Johansen <john.johansen@...onical.com>
cc: apparmor@...ts.ubuntu.com
cc: linux-security-module@...r.kernel.org
---

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

diff --git a/security/apparmor/apparmorfs.c b/security/apparmor/apparmorfs.c
index fefee040bf79..75f7da0e5ec1 100644
--- a/security/apparmor/apparmorfs.c
+++ b/security/apparmor/apparmorfs.c
@@ -23,6 +23,7 @@
 #include <linux/capability.h>
 #include <linux/rcupdate.h>
 #include <linux/fs.h>
+#include <linux/fs_context.h>
 #include <linux/poll.h>
 #include <uapi/linux/major.h>
 #include <uapi/linux/magic.h>
@@ -137,7 +138,7 @@ static const struct super_operations aafs_super_ops = {
 	.show_path = aafs_show_path,
 };
 
-static int fill_super(struct super_block *sb, void *data, int silent)
+static int apparmorfs_fill_super(struct super_block *sb, struct fs_context *fc)
 {
 	static struct tree_descr files[] = { {""} };
 	int error;
@@ -150,16 +151,25 @@ static int fill_super(struct super_block *sb, void *data, int silent)
 	return 0;
 }
 
-static struct dentry *aafs_mount(struct file_system_type *fs_type,
-				 int flags, const char *dev_name, void *data)
+static int apparmorfs_get_tree(struct fs_context *fc)
 {
-	return mount_single(fs_type, flags, data, fill_super);
+	return vfs_get_super(fc, vfs_get_single_super, apparmorfs_fill_super);
+}
+
+static const struct fs_context_operations apparmorfs_context_ops = {
+	.get_tree	= apparmorfs_get_tree,
+};
+
+static int apparmorfs_init_fs_context(struct fs_context *fc)
+{
+	fc->ops = &apparmorfs_context_ops;
+	return 0;
 }
 
 static struct file_system_type aafs_ops = {
 	.owner = THIS_MODULE,
 	.name = AAFS_NAME,
-	.mount = aafs_mount,
+	.init_fs_context = apparmorfs_init_fs_context,
 	.kill_sb = kill_anon_super,
 };