Commit e171b965 authored by Anna Schumaker's avatar Anna Schumaker Committed by Trond Myklebust
Browse files

NFS: Add implid to sysfs 



The Linux NFS server added support for returning this information during
an EXCHANGE_ID in Linux v6.13. This is something and admin might want to
query, so let's add it to sysfs.

Reviewed-by: default avatarBenjamin Coddington <bcodding@redhat.com>
Signed-off-by: default avatarAnna Schumaker <anna.schumaker@oracle.com>
Link: https://lore.kernel.org/r/20250207204225.594002-2-anna@kernel.org


Signed-off-by: default avatarTrond Myklebust <trond.myklebust@hammerspace.com>
parent cfe1f877

fs/nfs/sysfs.c

+60 −0
Original line number Diff line number Diff line
@@ -272,6 +272,38 @@ shutdown_store(struct kobject *kobj, struct kobj_attribute *attr, 


static struct kobj_attribute nfs_sysfs_attr_shutdown = __ATTR_RW(shutdown);



#if IS_ENABLED(CONFIG_NFS_V4_1)

static ssize_t

implid_domain_show(struct kobject *kobj, struct kobj_attribute *attr,

				char *buf)

{

	struct nfs_server *server = container_of(kobj, struct nfs_server, kobj);

	struct nfs41_impl_id *impl_id = server->nfs_client->cl_implid;



	if (!impl_id || strlen(impl_id->domain) == 0)

		return 0; //sysfs_emit(buf, "");

	return sysfs_emit(buf, "%s\n", impl_id->domain);

}



static struct kobj_attribute nfs_sysfs_attr_implid_domain = __ATTR_RO(implid_domain);





static ssize_t

implid_name_show(struct kobject *kobj, struct kobj_attribute *attr,

				char *buf)

{

	struct nfs_server *server = container_of(kobj, struct nfs_server, kobj);

	struct nfs41_impl_id *impl_id = server->nfs_client->cl_implid;



	if (!impl_id || strlen(impl_id->name) == 0)

		return 0; //sysfs_emit(buf, "");

	return sysfs_emit(buf, "%s\n", impl_id->name);

}



static struct kobj_attribute nfs_sysfs_attr_implid_name = __ATTR_RO(implid_name);



#endif /* IS_ENABLED(CONFIG_NFS_V4_1) */



#define RPC_CLIENT_NAME_SIZE 64



void nfs_sysfs_link_rpc_client(struct nfs_server *server,
@@ -309,6 +341,32 @@ static struct kobj_type nfs_sb_ktype = { 
	.child_ns_type = nfs_netns_object_child_ns_type,

};



#if IS_ENABLED(CONFIG_NFS_V4_1)

static void nfs_sysfs_add_nfsv41_server(struct nfs_server *server)

{

	int ret;



	if (!server->nfs_client->cl_implid)

		return;



	ret = sysfs_create_file_ns(&server->kobj, &nfs_sysfs_attr_implid_domain.attr,

					   nfs_netns_server_namespace(&server->kobj));

	if (ret < 0)

		pr_warn("NFS: sysfs_create_file_ns for server-%d failed (%d)\n",

			server->s_sysfs_id, ret);



	ret = sysfs_create_file_ns(&server->kobj, &nfs_sysfs_attr_implid_name.attr,

				   nfs_netns_server_namespace(&server->kobj));

	if (ret < 0)

		pr_warn("NFS: sysfs_create_file_ns for server-%d failed (%d)\n",

			server->s_sysfs_id, ret);

}

#else /* CONFIG_NFS_V4_1 */

static inline void nfs_sysfs_add_nfsv41_server(struct nfs_server *server)

{

}

#endif /* CONFIG_NFS_V4_1 */



void nfs_sysfs_add_server(struct nfs_server *server)

{

	int ret;
@@ -325,6 +383,8 @@ void nfs_sysfs_add_server(struct nfs_server *server) 
	if (ret < 0)

		pr_warn("NFS: sysfs_create_file_ns for server-%d failed (%d)\n",

			server->s_sysfs_id, ret);



	nfs_sysfs_add_nfsv41_server(server);

}

EXPORT_SYMBOL_GPL(nfs_sysfs_add_server);