Commit 88efd79c authored by Anna Schumaker's avatar Anna Schumaker Committed by Trond Myklebust
Browse files

sunrpc: Add a sysfs files for rpc_clnt information 



These files display useful information about the RPC client, such as the
rpc version number, program name, and maximum number of connections
allowed.

Reviewed-by: default avatarBenjamin Coddington <bcodding@redhat.com>
Signed-off-by: default avatarAnna Schumaker <anna.schumaker@oracle.com>
Link: https://lore.kernel.org/r/20250207204225.594002-4-anna@kernel.org


Signed-off-by: default avatarTrond Myklebust <trond.myklebust@hammerspace.com>
parent 41cb320b

net/sunrpc/sysfs.c

+73 −0
Original line number Diff line number Diff line
@@ -59,6 +59,16 @@ static struct kobject *rpc_sysfs_object_alloc(const char *name, 
	return NULL;

}



static inline struct rpc_clnt *

rpc_sysfs_client_kobj_get_clnt(struct kobject *kobj)

{

	struct rpc_sysfs_client *c = container_of(kobj,

		struct rpc_sysfs_client, kobject);

	struct rpc_clnt *ret = c->clnt;



	return refcount_inc_not_zero(&ret->cl_count) ? ret : NULL;

}



static inline struct rpc_xprt *

rpc_sysfs_xprt_kobj_get_xprt(struct kobject *kobj)

{
@@ -86,6 +96,51 @@ rpc_sysfs_xprt_switch_kobj_get_xprt(struct kobject *kobj) 
	return xprt_switch_get(x->xprt_switch);

}



static ssize_t rpc_sysfs_clnt_version_show(struct kobject *kobj,

					   struct kobj_attribute *attr,

					   char *buf)

{

	struct rpc_clnt *clnt = rpc_sysfs_client_kobj_get_clnt(kobj);

	ssize_t ret;



	if (!clnt)

		return sprintf(buf, "<closed>\n");



	ret = sprintf(buf, "%u", clnt->cl_vers);

	refcount_dec(&clnt->cl_count);

	return ret;

}



static ssize_t rpc_sysfs_clnt_program_show(struct kobject *kobj,

					   struct kobj_attribute *attr,

					   char *buf)

{

	struct rpc_clnt *clnt = rpc_sysfs_client_kobj_get_clnt(kobj);

	ssize_t ret;



	if (!clnt)

		return sprintf(buf, "<closed>\n");



	ret = sprintf(buf, "%s", clnt->cl_program->name);

	refcount_dec(&clnt->cl_count);

	return ret;

}



static ssize_t rpc_sysfs_clnt_max_connect_show(struct kobject *kobj,

					       struct kobj_attribute *attr,

					       char *buf)

{

	struct rpc_clnt *clnt = rpc_sysfs_client_kobj_get_clnt(kobj);

	ssize_t ret;



	if (!clnt)

		return sprintf(buf, "<closed>\n");



	ret = sprintf(buf, "%u\n", clnt->cl_max_connect);

	refcount_dec(&clnt->cl_count);

	return ret;

}



static ssize_t rpc_sysfs_xprt_dstaddr_show(struct kobject *kobj,

					   struct kobj_attribute *attr,

					   char *buf)
@@ -423,6 +478,23 @@ static const void *rpc_sysfs_xprt_namespace(const struct kobject *kobj) 
			    kobject)->xprt->xprt_net;

}



static struct kobj_attribute rpc_sysfs_clnt_version = __ATTR(rpc_version,

	0444, rpc_sysfs_clnt_version_show, NULL);



static struct kobj_attribute rpc_sysfs_clnt_program = __ATTR(program,

	0444, rpc_sysfs_clnt_program_show, NULL);



static struct kobj_attribute rpc_sysfs_clnt_max_connect = __ATTR(max_connect,

	0444, rpc_sysfs_clnt_max_connect_show, NULL);



static struct attribute *rpc_sysfs_rpc_clnt_attrs[] = {

	&rpc_sysfs_clnt_version.attr,

	&rpc_sysfs_clnt_program.attr,

	&rpc_sysfs_clnt_max_connect.attr,

	NULL,

};

ATTRIBUTE_GROUPS(rpc_sysfs_rpc_clnt);



static struct kobj_attribute rpc_sysfs_xprt_dstaddr = __ATTR(dstaddr,

	0644, rpc_sysfs_xprt_dstaddr_show, rpc_sysfs_xprt_dstaddr_store);
@@ -459,6 +531,7 @@ ATTRIBUTE_GROUPS(rpc_sysfs_xprt_switch); 


static const struct kobj_type rpc_sysfs_client_type = {

	.release = rpc_sysfs_client_release,

	.default_groups = rpc_sysfs_rpc_clnt_groups,

	.sysfs_ops = &kobj_sysfs_ops,

	.namespace = rpc_sysfs_client_namespace,

};