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vfs: Convert securityfs to use the new mount API 

Convert the securityfs filesystem to the new internal mount API as the old
one will be obsoleted and removed.  This allows greater flexibility in
communication of mount parameters between userspace, the VFS and the
filesystem.

See Documentation/filesystems/mount_api.txt for more information.

Signed-off-by: David Howells <dhowells@redhat.com>
cc: linux-security-module@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
David Howells 2019-03-25 16:38:30 +00:00 committed by Al Viro
parent b0ecc9da5f
commit 5c86d7e043
1 changed files with 15 additions and 6 deletions
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21
security/inode.c
View File

@ -16,6 +16,7 @@
#include <linux/sysfs.h> #include <linux/sysfs.h>
#include <linux/kobject.h> #include <linux/kobject.h>
#include <linux/fs.h> #include <linux/fs.h>
#include <linux/fs_context.h>
#include <linux/mount.h> #include <linux/mount.h>
#include <linux/pagemap.h> #include <linux/pagemap.h>
#include <linux/init.h> #include <linux/init.h>
@ -39,7 +40,7 @@ static const struct super_operations securityfs_super_operations = {
.free_inode = securityfs_free_inode, .free_inode = securityfs_free_inode,
}; };
static int fill_super(struct super_block *sb, void *data, int silent) static int securityfs_fill_super(struct super_block *sb, struct fs_context *fc)
{ {
static const struct tree_descr files[] = {{""}}; static const struct tree_descr files[] = {{""}};
int error; int error;
@ -53,17 +54,25 @@ static int fill_super(struct super_block *sb, void *data, int silent)
return 0; return 0;
} }
static struct dentry *get_sb(struct file_system_type *fs_type, static int securityfs_get_tree(struct fs_context *fc)
int flags, const char *dev_name,
void *data)
{ {
return mount_single(fs_type, flags, data, fill_super); return get_tree_single(fc, securityfs_fill_super);
}
static const struct fs_context_operations securityfs_context_ops = {
.get_tree = securityfs_get_tree,
};
static int securityfs_init_fs_context(struct fs_context *fc)
{
fc->ops = &securityfs_context_ops;
return 0;
} }
static struct file_system_type fs_type = { static struct file_system_type fs_type = {
.owner = THIS_MODULE, .owner = THIS_MODULE,
.name = "securityfs", .name = "securityfs",
.mount = get_sb, .init_fs_context = securityfs_init_fs_context,
.kill_sb = kill_litter_super, .kill_sb = kill_litter_super,
}; };