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sunrpc: Add a sysfs files for rpc_clnt information

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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: Benjamin Coddington <bcodding@redhat.com>
Signed-off-by: Anna Schumaker <anna.schumaker@oracle.com>
Link: https://lore.kernel.org/r/20250207204225.594002-4-anna@kernel.org
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
This commit is contained in:
Anna Schumaker 2025-02-07 15:42:23 -05:00 committed by Trond Myklebust
parent 41cb320b81
commit 88efd79c3f
1 changed files with 73 additions and 0 deletions
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73
net/sunrpc/sysfs.c
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@ -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,
};