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sunrpc: add xprt_switch direcotry to sunrpc's sysfs

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Add xprt_switch directory to the sysfs and create individual
xprt_swith subdirectories for multipath transport group.

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 15:59:16 -04:00 committed by Trond Myklebust
parent d3abc73987
commit baea99445d
4 changed files with 108 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
include/linux/sunrpc/xprtmultipath.h
View File

@ -10,6 +10,7 @@
#define _NET_SUNRPC_XPRTMULTIPATH_H
struct rpc_xprt_iter_ops;
struct rpc_sysfs_xprt_switch;
struct rpc_xprt_switch {
spinlock_t xps_lock;
struct kref xps_kref;
@ -24,6 +25,7 @@ struct rpc_xprt_switch {
const struct rpc_xprt_iter_ops *xps_iter_ops;
struct rpc_sysfs_xprt_switch *xps_sysfs;
struct rcu_head xps_rcu;
};

99
net/sunrpc/sysfs.c
View File

@ -7,7 +7,7 @@
#include "sysfs.h"
static struct kset *rpc_sunrpc_kset;
static struct kobject *rpc_sunrpc_client_kobj;
static struct kobject *rpc_sunrpc_client_kobj, *rpc_sunrpc_xprt_switch_kobj;
static void rpc_sysfs_object_release(struct kobject *kobj)
{
@ -48,13 +48,22 @@ int rpc_sysfs_init(void)
rpc_sunrpc_kset = kset_create_and_add("sunrpc", NULL, kernel_kobj);
if (!rpc_sunrpc_kset)
return -ENOMEM;
rpc_sunrpc_client_kobj = rpc_sysfs_object_alloc("client", rpc_sunrpc_kset, NULL);
if (!rpc_sunrpc_client_kobj) {
kset_unregister(rpc_sunrpc_kset);
rpc_sunrpc_client_kobj = NULL;
return -ENOMEM;
}
rpc_sunrpc_client_kobj =
rpc_sysfs_object_alloc("rpc-clients", rpc_sunrpc_kset, NULL);
if (!rpc_sunrpc_client_kobj)
goto err_client;
rpc_sunrpc_xprt_switch_kobj =
rpc_sysfs_object_alloc("xprt-switches", rpc_sunrpc_kset, NULL);
if (!rpc_sunrpc_xprt_switch_kobj)
goto err_switch;
return 0;
err_switch:
kobject_put(rpc_sunrpc_client_kobj);
rpc_sunrpc_client_kobj = NULL;
err_client:
kset_unregister(rpc_sunrpc_kset);
rpc_sunrpc_kset = NULL;
return -ENOMEM;
}
static void rpc_sysfs_client_release(struct kobject *kobj)
@ -65,20 +74,40 @@ static void rpc_sysfs_client_release(struct kobject *kobj)
kfree(c);
}
static void rpc_sysfs_xprt_switch_release(struct kobject *kobj)
{
struct rpc_sysfs_xprt_switch *xprt_switch;
xprt_switch = container_of(kobj, struct rpc_sysfs_xprt_switch, kobject);
kfree(xprt_switch);
}
static const void *rpc_sysfs_client_namespace(struct kobject *kobj)
{
return container_of(kobj, struct rpc_sysfs_client, kobject)->net;
}
static const void *rpc_sysfs_xprt_switch_namespace(struct kobject *kobj)
{
return container_of(kobj, struct rpc_sysfs_xprt_switch, 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,
};
static struct kobj_type rpc_sysfs_xprt_switch_type = {
.release = rpc_sysfs_xprt_switch_release,
.sysfs_ops = &kobj_sysfs_ops,
.namespace = rpc_sysfs_xprt_switch_namespace,
};
void rpc_sysfs_exit(void)
{
kobject_put(rpc_sunrpc_client_kobj);
kobject_put(rpc_sunrpc_xprt_switch_kobj);
kset_unregister(rpc_sunrpc_kset);
}
@ -100,6 +129,28 @@ static struct rpc_sysfs_client *rpc_sysfs_client_alloc(struct kobject *parent,
return NULL;
}
static struct rpc_sysfs_xprt_switch *
rpc_sysfs_xprt_switch_alloc(struct kobject *parent,
struct rpc_xprt_switch *xprt_switch,
struct net *net,
gfp_t gfp_flags)
{
struct rpc_sysfs_xprt_switch *p;
p = kzalloc(sizeof(*p), gfp_flags);
if (p) {
p->net = net;
p->kobject.kset = rpc_sunrpc_kset;
if (kobject_init_and_add(&p->kobject,
&rpc_sysfs_xprt_switch_type,
parent, "switch-%d",
xprt_switch->xps_id) == 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;
@ -111,6 +162,28 @@ void rpc_sysfs_client_setup(struct rpc_clnt *clnt, struct net *net)
}
}
void rpc_sysfs_xprt_switch_setup(struct rpc_xprt_switch *xprt_switch,
struct rpc_xprt *xprt,
gfp_t gfp_flags)
{
struct rpc_sysfs_xprt_switch *rpc_xprt_switch;
struct net *net;
if (xprt_switch->xps_net)
net = xprt_switch->xps_net;
else
net = xprt->xprt_net;
rpc_xprt_switch =
rpc_sysfs_xprt_switch_alloc(rpc_sunrpc_xprt_switch_kobj,
xprt_switch, net, gfp_flags);
if (rpc_xprt_switch) {
xprt_switch->xps_sysfs = rpc_xprt_switch;
rpc_xprt_switch->xprt_switch = xprt_switch;
rpc_xprt_switch->xprt = xprt;
kobject_uevent(&rpc_xprt_switch->kobject, KOBJ_ADD);
}
}
void rpc_sysfs_client_destroy(struct rpc_clnt *clnt)
{
struct rpc_sysfs_client *rpc_client = clnt->cl_sysfs;
@ -122,3 +195,15 @@ void rpc_sysfs_client_destroy(struct rpc_clnt *clnt)
clnt->cl_sysfs = NULL;
}
}
void rpc_sysfs_xprt_switch_destroy(struct rpc_xprt_switch *xprt_switch)
{
struct rpc_sysfs_xprt_switch *rpc_xprt_switch = xprt_switch->xps_sysfs;
if (rpc_xprt_switch) {
kobject_uevent(&rpc_xprt_switch->kobject, KOBJ_REMOVE);
kobject_del(&rpc_xprt_switch->kobject);
kobject_put(&rpc_xprt_switch->kobject);
xprt_switch->xps_sysfs = NULL;
}
}

10
net/sunrpc/sysfs.h
View File

@ -10,10 +10,20 @@ struct rpc_sysfs_client {
struct net *net;
};
struct rpc_sysfs_xprt_switch {
struct kobject kobject;
struct net *net;
struct rpc_xprt_switch *xprt_switch;
struct rpc_xprt *xprt;
};
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);
void rpc_sysfs_xprt_switch_setup(struct rpc_xprt_switch *xprt_switch,
struct rpc_xprt *xprt, gfp_t gfp_flags);
void rpc_sysfs_xprt_switch_destroy(struct rpc_xprt_switch *xprt);
#endif

4
net/sunrpc/xprtmultipath.c
View File

@ -19,6 +19,8 @@
#include <linux/sunrpc/addr.h>
#include <linux/sunrpc/xprtmultipath.h>
#include "sysfs.h"
typedef struct rpc_xprt *(*xprt_switch_find_xprt_t)(struct rpc_xprt_switch *xps,
const struct rpc_xprt *cur);
@ -133,6 +135,7 @@ struct rpc_xprt_switch *xprt_switch_alloc(struct rpc_xprt *xprt,
xps->xps_net = NULL;
INIT_LIST_HEAD(&xps->xps_xprt_list);
xps->xps_iter_ops = &rpc_xprt_iter_singular;
rpc_sysfs_xprt_switch_setup(xps, xprt, gfp_flags);
xprt_switch_add_xprt_locked(xps, xprt);
}
@ -161,6 +164,7 @@ static void xprt_switch_free(struct kref *kref)
struct rpc_xprt_switch, xps_kref);
xprt_switch_free_entries(xps);
rpc_sysfs_xprt_switch_destroy(xps);
xprt_switch_free_id(xps);
kfree_rcu(xps, xps_rcu);
}