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authorDavid Howells <dhowells@redhat.com>2019-03-25 17:38:28 +0100
committerAl Viro <viro@zeniv.linux.org.uk>2019-05-25 23:59:56 +0200
commitb9662f3103546005b9cc01862bb1031fe5e99ff9 (patch)
tree80601bb05d350b38d8c3eaa1bb98ce0bcb9908c2 /net
parentconsolidate the capability checks in sget_{fc,userns}() (diff)
downloadlinux-b9662f3103546005b9cc01862bb1031fe5e99ff9.tar.xz
linux-b9662f3103546005b9cc01862bb1031fe5e99ff9.zip
vfs: Convert rpc_pipefs to use the new mount API
Convert the rpc_pipefs 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: Trond Myklebust <trond.myklebust@hammerspace.com> cc: Anna Schumaker <anna.schumaker@netapp.com> cc: "J. Bruce Fields" <bfields@fieldses.org> cc: Jeff Layton <jlayton@kernel.org> cc: linux-nfs@vger.kernel.org
Diffstat (limited to 'net')
-rw-r--r--net/sunrpc/rpc_pipe.c34
1 files changed, 26 insertions, 8 deletions
diff --git a/net/sunrpc/rpc_pipe.c b/net/sunrpc/rpc_pipe.c
index 979d23646e33..0b6c27cd6bde 100644
--- a/net/sunrpc/rpc_pipe.c
+++ b/net/sunrpc/rpc_pipe.c
@@ -13,6 +13,7 @@
#include <linux/string.h>
#include <linux/pagemap.h>
#include <linux/mount.h>
+#include <linux/fs_context.h>
#include <linux/namei.h>
#include <linux/fsnotify.h>
#include <linux/kernel.h>
@@ -1347,11 +1348,11 @@ rpc_gssd_dummy_depopulate(struct dentry *pipe_dentry)
}
static int
-rpc_fill_super(struct super_block *sb, void *data, int silent)
+rpc_fill_super(struct super_block *sb, struct fs_context *fc)
{
struct inode *inode;
struct dentry *root, *gssd_dentry;
- struct net *net = get_net(sb->s_fs_info);
+ struct net *net = sb->s_fs_info;
struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
int err;
@@ -1408,12 +1409,29 @@ gssd_running(struct net *net)
}
EXPORT_SYMBOL_GPL(gssd_running);
-static struct dentry *
-rpc_mount(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+static int rpc_fs_get_tree(struct fs_context *fc)
+{
+ fc->s_fs_info = get_net(fc->net_ns);
+ return vfs_get_super(fc, vfs_get_keyed_super, rpc_fill_super);
+}
+
+static void rpc_fs_free_fc(struct fs_context *fc)
{
- struct net *net = current->nsproxy->net_ns;
- return mount_ns(fs_type, flags, data, net, net->user_ns, rpc_fill_super);
+ if (fc->s_fs_info)
+ put_net(fc->s_fs_info);
+}
+
+static const struct fs_context_operations rpc_fs_context_ops = {
+ .free = rpc_fs_free_fc,
+ .get_tree = rpc_fs_get_tree,
+};
+
+static int rpc_init_fs_context(struct fs_context *fc)
+{
+ put_user_ns(fc->user_ns);
+ fc->user_ns = get_user_ns(fc->net_ns->user_ns);
+ fc->ops = &rpc_fs_context_ops;
+ return 0;
}
static void rpc_kill_sb(struct super_block *sb)
@@ -1441,7 +1459,7 @@ out:
static struct file_system_type rpc_pipe_fs_type = {
.owner = THIS_MODULE,
.name = "rpc_pipefs",
- .mount = rpc_mount,
+ .init_fs_context = rpc_init_fs_context,
.kill_sb = rpc_kill_sb,
};
MODULE_ALIAS_FS("rpc_pipefs");