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NFS: Add implid to sysfs

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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: Benjamin Coddington <bcodding@redhat.com>
Signed-off-by: Anna Schumaker <anna.schumaker@oracle.com>
Link: https://lore.kernel.org/r/20250207204225.594002-2-anna@kernel.org
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
This commit is contained in:
Anna Schumaker 2025-02-07 15:42:21 -05:00 committed by Trond Myklebust
parent cfe1f8776f
commit e171b96500
1 changed files with 60 additions and 0 deletions
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60
fs/nfs/sysfs.c
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@ -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);