Signed-off-by: David Howells <dhowe...@redhat.com> cc: Trond Myklebust <trond.mykleb...@hammerspace.com> cc: Anna Schumaker <anna.schuma...@netapp.com> cc: "J. Bruce Fields" <bfie...@fieldses.org> cc: Jeff Layton <jlay...@kernel.org> cc: linux-...@vger.kernel.org ---
net/sunrpc/rpc_pipe.c | 34 ++++++++++++++++++++++++++-------- 1 file changed, 26 insertions(+), 8 deletions(-) diff --git a/net/sunrpc/rpc_pipe.c b/net/sunrpc/rpc_pipe.c index 69663681bf9d..2d697861d49a 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> @@ -1354,11 +1355,11 @@ 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; @@ -1415,12 +1416,29 @@ 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) @@ -1448,7 +1466,7 @@ static void rpc_kill_sb(struct super_block *sb) 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");