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vfs: Convert configfs to use the new mount API

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Convert the configfs 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: Joel Becker <jlbec@evilplan.org>
cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
David Howells 2019-03-25 16:38:29 +00:00 committed by Al Viro
parent bc99a664e9
commit 6bc62f2067
1 changed files with 15 additions and 5 deletions
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20
fs/configfs/mount.c
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@ -27,6 +27,7 @@
#include <linux/fs.h> #include <linux/fs.h>
#include <linux/module.h> #include <linux/module.h>
#include <linux/mount.h> #include <linux/mount.h>
#include <linux/fs_context.h>
#include <linux/pagemap.h> #include <linux/pagemap.h>
#include <linux/init.h> #include <linux/init.h>
#include <linux/slab.h> #include <linux/slab.h>
@ -66,7 +67,7 @@ static struct configfs_dirent configfs_root = {
.s_iattr = NULL, .s_iattr = NULL,
}; };
static int configfs_fill_super(struct super_block *sb, void *data, int silent) static int configfs_fill_super(struct super_block *sb, struct fs_context *fc)
{ {
struct inode *inode; struct inode *inode;
struct dentry *root; struct dentry *root;
@ -102,16 +103,25 @@ static int configfs_fill_super(struct super_block *sb, void *data, int silent)
return 0; return 0;
} }
static struct dentry *configfs_do_mount(struct file_system_type *fs_type, static int configfs_get_tree(struct fs_context *fc)
int flags, const char *dev_name, void *data)
{ {
return mount_single(fs_type, flags, data, configfs_fill_super); return get_tree_single(fc, configfs_fill_super);
}
static const struct fs_context_operations configfs_context_ops = {
.get_tree = configfs_get_tree,
};
static int configfs_init_fs_context(struct fs_context *fc)
{
fc->ops = &configfs_context_ops;
return 0;
} }
static struct file_system_type configfs_fs_type = { static struct file_system_type configfs_fs_type = {
.owner = THIS_MODULE, .owner = THIS_MODULE,
.name = "configfs", .name = "configfs",
.mount = configfs_do_mount, .init_fs_context = configfs_init_fs_context,
.kill_sb = kill_litter_super, .kill_sb = kill_litter_super,
}; };
MODULE_ALIAS_FS("configfs"); MODULE_ALIAS_FS("configfs");