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sunrpc: Create per-rpc_clnt sysfs kobjects 

These will eventually have files placed under them for sysfs operations.

Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: Olga Kornievskaia <kolga@netapp.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
This commit is contained in:
Olga Kornievskaia 2021-06-08 15:59:12 -04:00 committed by Trond Myklebust
parent c441f125de
commit c5a382ebdb
4 changed files with 76 additions and 0 deletions
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2
include/linux/sunrpc/clnt.h
View File

@ -29,6 +29,7 @@
#include <linux/sunrpc/xprtmultipath.h>
struct rpc_inode;
struct rpc_sysfs_client;
/*
* The high-level client handle
@ -71,6 +72,7 @@ struct rpc_clnt {
#if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
struct dentry *cl_debugfs; /* debugfs directory */
#endif
struct rpc_sysfs_client *cl_sysfs; /* sysfs directory */
/* cl_work is only needed after cl_xpi is no longer used,
* and that are of similar size
*/

5
net/sunrpc/clnt.c
View File

@ -41,6 +41,7 @@
#include <trace/events/sunrpc.h>
#include "sunrpc.h"
#include "sysfs.h"
#include "netns.h"
#if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
@ -300,6 +301,7 @@ static int rpc_client_register(struct rpc_clnt *clnt,
int err;
rpc_clnt_debugfs_register(clnt);
rpc_sysfs_client_setup(clnt, net);
pipefs_sb = rpc_get_sb_net(net);
if (pipefs_sb) {
@ -327,6 +329,7 @@ err_auth:
out:
if (pipefs_sb)
rpc_put_sb_net(net);
rpc_sysfs_client_destroy(clnt);
rpc_clnt_debugfs_unregister(clnt);
return err;
}
@ -733,6 +736,7 @@ int rpc_switch_client_transport(struct rpc_clnt *clnt,
rpc_unregister_client(clnt);
__rpc_clnt_remove_pipedir(clnt);
rpc_sysfs_client_destroy(clnt);
rpc_clnt_debugfs_unregister(clnt);
/*
@ -879,6 +883,7 @@ static void rpc_free_client_work(struct work_struct *work)
* so they cannot be called in rpciod, so they are handled separately
* here.
*/
rpc_sysfs_client_destroy(clnt);
rpc_clnt_debugfs_unregister(clnt);
rpc_free_clid(clnt);
rpc_clnt_remove_pipedir(clnt);

61
net/sunrpc/sysfs.c
View File

@ -4,6 +4,7 @@
*/
#include <linux/sunrpc/clnt.h>
#include <linux/kobject.h>
#include "sysfs.h"
static struct kset *rpc_sunrpc_kset;
static struct kobject *rpc_sunrpc_client_kobj;
@ -56,8 +57,68 @@ int rpc_sysfs_init(void)
return 0;
}
static void rpc_sysfs_client_release(struct kobject *kobj)
{
struct rpc_sysfs_client *c;
c = container_of(kobj, struct rpc_sysfs_client, kobject);
kfree(c);
}
static const void *rpc_sysfs_client_namespace(struct kobject *kobj)
{
return container_of(kobj, struct rpc_sysfs_client, kobject)->net;
}
static struct kobj_type rpc_sysfs_client_type = {
.release = rpc_sysfs_client_release,
.sysfs_ops = &kobj_sysfs_ops,
.namespace = rpc_sysfs_client_namespace,
};
void rpc_sysfs_exit(void)
{
kobject_put(rpc_sunrpc_client_kobj);
kset_unregister(rpc_sunrpc_kset);
}
static struct rpc_sysfs_client *rpc_sysfs_client_alloc(struct kobject *parent,
struct net *net,
int clid)
{
struct rpc_sysfs_client *p;
p = kzalloc(sizeof(*p), GFP_KERNEL);
if (p) {
p->net = net;
p->kobject.kset = rpc_sunrpc_kset;
if (kobject_init_and_add(&p->kobject, &rpc_sysfs_client_type,
parent, "clnt-%d", clid) == 0)
return p;
kobject_put(&p->kobject);
}
return NULL;
}
void rpc_sysfs_client_setup(struct rpc_clnt *clnt, struct net *net)
{
struct rpc_sysfs_client *rpc_client;
rpc_client = rpc_sysfs_client_alloc(rpc_sunrpc_client_kobj, net, clnt->cl_clid);
if (rpc_client) {
clnt->cl_sysfs = rpc_client;
kobject_uevent(&rpc_client->kobject, KOBJ_ADD);
}
}
void rpc_sysfs_client_destroy(struct rpc_clnt *clnt)
{
struct rpc_sysfs_client *rpc_client = clnt->cl_sysfs;
if (rpc_client) {
kobject_uevent(&rpc_client->kobject, KOBJ_REMOVE);
kobject_del(&rpc_client->kobject);
kobject_put(&rpc_client->kobject);
clnt->cl_sysfs = NULL;
}
}

8
net/sunrpc/sysfs.h
View File

@ -5,7 +5,15 @@
#ifndef __SUNRPC_SYSFS_H
#define __SUNRPC_SYSFS_H
struct rpc_sysfs_client {
struct kobject kobject;
struct net *net;
};
int rpc_sysfs_init(void);
void rpc_sysfs_exit(void);
void rpc_sysfs_client_setup(struct rpc_clnt *clnt, struct net *net);
void rpc_sysfs_client_destroy(struct rpc_clnt *clnt);
#endif