cifs: Register generic netlink family (06f08dab) · Commits · 戴 / test

fs/cifs/Kconfig

+11 −0

Original line number	Diff line number	Diff line
		@@ -190,6 +190,17 @@ config CIFS_DFS_UPCALL
		servers if their addresses change or for implicit mounts of
		DFS junction points. If unsure, say Y.

		config CIFS_SWN_UPCALL
		bool "SWN feature support"
		depends on CIFS
		help
		The Service Witness Protocol (SWN) is used to get notifications
		from a highly available server of resource state changes. This
		feature enables an upcall mechanism for CIFS which contacts an
		userspace daemon to establish the DCE/RPC connection to retrieve
		the cluster available interfaces and resource change notifications.
		If unsure, say Y.

		config CIFS_NFSD_EXPORT
		bool "Allow nfsd to export CIFS file system"
		depends on CIFS && BROKEN

+2 −0

Original line number	Diff line number	Diff line
		@@ -18,6 +18,8 @@ cifs-$(CONFIG_CIFS_UPCALL) += cifs_spnego.o

		cifs-$(CONFIG_CIFS_DFS_UPCALL) += dns_resolve.o cifs_dfs_ref.o dfs_cache.o

		cifs-$(CONFIG_CIFS_SWN_UPCALL) += netlink.o

		cifs-$(CONFIG_CIFS_FSCACHE) += fscache.o cache.o

		cifs-$(CONFIG_CIFS_SMB_DIRECT) += smbdirect.o

+16 −1

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		@@ -55,6 +55,9 @@
		#ifdef CONFIG_CIFS_DFS_UPCALL
		#include "dfs_cache.h"
		#endif
		#ifdef CONFIG_CIFS_SWN_UPCALL
		#include "netlink.h"
		#endif
		#include "fs_context.h"

		/*
		@@ -1601,10 +1604,15 @@ init_cifs(void)
		if (rc)
		goto out_destroy_dfs_cache;
		#endif /* CONFIG_CIFS_UPCALL */
		#ifdef CONFIG_CIFS_SWN_UPCALL
		rc = cifs_genl_init();
		if (rc)
		goto out_register_key_type;
		#endif /* CONFIG_CIFS_SWN_UPCALL */

		rc = init_cifs_idmap();
		if (rc)
		goto out_register_key_type;
		goto out_cifs_swn_init;

		rc = register_filesystem(&cifs_fs_type);
		if (rc)
		@@ -1620,7 +1628,11 @@ init_cifs(void)

		out_init_cifs_idmap:
		exit_cifs_idmap();
		out_cifs_swn_init:
		#ifdef CONFIG_CIFS_SWN_UPCALL
		cifs_genl_exit();
		out_register_key_type:
		#endif
		#ifdef CONFIG_CIFS_UPCALL
		exit_cifs_spnego();
		out_destroy_dfs_cache:
		@@ -1657,6 +1669,9 @@ exit_cifs(void)
		unregister_filesystem(&smb3_fs_type);
		cifs_dfs_release_automount_timer();
		exit_cifs_idmap();
		#ifdef CONFIG_CIFS_SWN_UPCALL
		cifs_genl_exit();
		#endif
		#ifdef CONFIG_CIFS_UPCALL
		exit_cifs_spnego();
		#endif

0 → 100644

+69 −0

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		// SPDX-License-Identifier: GPL-2.0
		/*
		* Netlink routines for CIFS
		*
		* Copyright (c) 2020 Samuel Cabrero <scabrero@suse.de>
		*/

		#include <net/genetlink.h>
		#include <uapi/linux/cifs/cifs_netlink.h>

		#include "netlink.h"
		#include "cifsglob.h"
		#include "cifs_debug.h"

		static const struct nla_policy cifs_genl_policy[CIFS_GENL_ATTR_MAX + 1] = {
		};

		static struct genl_ops cifs_genl_ops[] = {
		};

		static const struct genl_multicast_group cifs_genl_mcgrps[] = {
		[CIFS_GENL_MCGRP_SWN] = { .name = CIFS_GENL_MCGRP_SWN_NAME },
		};

		struct genl_family cifs_genl_family = {
		.name = CIFS_GENL_NAME,
		.version = CIFS_GENL_VERSION,
		.hdrsize = 0,
		.maxattr = CIFS_GENL_ATTR_MAX,
		.module = THIS_MODULE,
		.policy = cifs_genl_policy,
		.ops = cifs_genl_ops,
		.n_ops = ARRAY_SIZE(cifs_genl_ops),
		.mcgrps = cifs_genl_mcgrps,
		.n_mcgrps = ARRAY_SIZE(cifs_genl_mcgrps),
		};

		/**
		* cifs_genl_init - Register generic netlink family
		*
		* Return zero if initialized successfully, otherwise non-zero.
		*/
		int cifs_genl_init(void)
		{
		int ret;

		ret = genl_register_family(&cifs_genl_family);
		if (ret < 0) {
		cifs_dbg(VFS, "%s: failed to register netlink family\n",
		__func__);
		return ret;
		}

		return 0;
		}

		/**
		* cifs_genl_exit - Unregister generic netlink family
		*/
		void cifs_genl_exit(void)
		{
		int ret;

		ret = genl_unregister_family(&cifs_genl_family);
		if (ret < 0) {
		cifs_dbg(VFS, "%s: failed to unregister netlink family\n",
		__func__);
		}
		}

0 → 100644

+16 −0

Original line number	Diff line number	Diff line
		/* SPDX-License-Identifier: GPL-2.0 */
		/*
		* Netlink routines for CIFS
		*
		* Copyright (c) 2020 Samuel Cabrero <scabrero@suse.de>
		*/

		#ifndef _CIFS_NETLINK_H
		#define _CIFS_NETLINK_H

		extern struct genl_family cifs_genl_family;

		extern int cifs_genl_init(void);
		extern void cifs_genl_exit(void);

		#endif /* _CIFS_NETLINK_H */