NFS: Create a root NFS directory in /sys/fs/nfs (996bc4f4) · Commits · 戴 / test

fs/nfs/Makefile

+2 −1

Original line number	Diff line number	Diff line
		@@ -8,7 +8,8 @@ obj-$(CONFIG_NFS_FS) += nfs.o
		CFLAGS_nfstrace.o += -I$(src)
		nfs-y := client.o dir.o file.o getroot.o inode.o super.o \
		io.o direct.o pagelist.o read.o symlink.o unlink.o \
		write.o namespace.o mount_clnt.o nfstrace.o export.o
		write.o namespace.o mount_clnt.o nfstrace.o \
		export.o sysfs.o
		nfs-$(CONFIG_ROOT_NFS) += nfsroot.o
		nfs-$(CONFIG_SYSCTL) += sysctl.o
		nfs-$(CONFIG_NFS_FSCACHE) += fscache.o fscache-index.o

+8 −0

Original line number	Diff line number	Diff line
		@@ -51,6 +51,7 @@
		#include "pnfs.h"
		#include "nfs.h"
		#include "netns.h"
		#include "sysfs.h"

		#include "nfstrace.h"

		@@ -2182,6 +2183,10 @@ static int __init init_nfs_fs(void)
		{
		int err;

		err = nfs_sysfs_init();
		if (err < 0)
		goto out10;

		err = register_pernet_subsys(&nfs_net_ops);
		if (err < 0)
		goto out9;
		@@ -2245,6 +2250,8 @@ out7:
		out8:
		unregister_pernet_subsys(&nfs_net_ops);
		out9:
		nfs_sysfs_exit();
		out10:
		return err;
		}

		@@ -2261,6 +2268,7 @@ static void __exit exit_nfs_fs(void)
		unregister_nfs_fs();
		nfs_fs_proc_exit();
		nfsiod_stop();
		nfs_sysfs_exit();
		}

		/* Not quite true; I just maintain it */

0 → 100644

+69 −0

Original line number	Diff line number	Diff line
		// SPDX-License-Identifier: GPL-2.0
		/*
		* Copyright (c) 2019 Hammerspace Inc
		*/

		#include <linux/module.h>
		#include <linux/kobject.h>
		#include <linux/sysfs.h>
		#include <linux/fs.h>
		#include <linux/slab.h>
		#include <linux/netdevice.h>

		#include "sysfs.h"

		struct kobject *nfs_client_kobj;
		static struct kset *nfs_client_kset;

		static void nfs_netns_object_release(struct kobject *kobj)
		{
		kfree(kobj);
		}

		static const struct kobj_ns_type_operations *nfs_netns_object_child_ns_type(
		struct kobject *kobj)
		{
		return &net_ns_type_operations;
		}

		static struct kobj_type nfs_netns_object_type = {
		.release = nfs_netns_object_release,
		.sysfs_ops = &kobj_sysfs_ops,
		.child_ns_type = nfs_netns_object_child_ns_type,
		};

		static struct kobject nfs_netns_object_alloc(const char name,
		struct kset kset, struct kobject parent)
		{
		struct kobject *kobj;

		kobj = kzalloc(sizeof(*kobj), GFP_KERNEL);
		if (kobj) {
		kobj->kset = kset;
		if (kobject_init_and_add(kobj, &nfs_netns_object_type,
		parent, "%s", name) == 0)
		return kobj;
		kobject_put(kobj);
		}
		return NULL;
		}

		int nfs_sysfs_init(void)
		{
		nfs_client_kset = kset_create_and_add("nfs", NULL, fs_kobj);
		if (!nfs_client_kset)
		return -ENOMEM;
		nfs_client_kobj = nfs_netns_object_alloc("net", nfs_client_kset, NULL);
		if (!nfs_client_kobj) {
		kset_unregister(nfs_client_kset);
		nfs_client_kset = NULL;
		return -ENOMEM;
		}
		return 0;
		}

		void nfs_sysfs_exit(void)
		{
		kobject_put(nfs_client_kobj);
		kset_unregister(nfs_client_kset);
		}

0 → 100644

+15 −0

Original line number	Diff line number	Diff line
		// SPDX-License-Identifier: GPL-2.0
		/*
		* Copyright (c) 2019 Hammerspace Inc
		*/

		#ifndef __NFS_SYSFS_H
		#define __NFS_SYSFS_H


		extern struct kobject *nfs_client_kobj;

		extern int nfs_sysfs_init(void);
		extern void nfs_sysfs_exit(void);

		#endif