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sunrpc: provide transport info in the sysfs directory 

Allow to query transport's attributes. Currently showing following
fields of the rpc_xprt structure: state, last_used, cong, cwnd,
max_reqs, min_reqs, num_reqs, sizes of queues binding, sending,
pending, backlog.

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 15:59:20 -04:00 committed by Trond Myklebust
parent 587bc7255d
commit 4a09651a6b
1 changed files with 25 additions and 0 deletions
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25
net/sunrpc/sysfs.c
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@ -81,6 +81,27 @@ static ssize_t rpc_sysfs_xprt_dstaddr_show(struct kobject *kobj,
return ret + 1;
}
static ssize_t rpc_sysfs_xprt_info_show(struct kobject *kobj,
struct kobj_attribute *attr,
char *buf)
{
struct rpc_xprt *xprt = rpc_sysfs_xprt_kobj_get_xprt(kobj);
ssize_t ret;
if (!xprt)
return 0;
ret = sprintf(buf, "last_used=%lu\ncur_cong=%lu\ncong_win=%lu\n"
"max_num_slots=%u\nmin_num_slots=%u\nnum_reqs=%u\n"
"binding_q_len=%u\nsending_q_len=%u\npending_q_len=%u\n"
"backlog_q_len=%u\n", xprt->last_used, xprt->cong,
xprt->cwnd, xprt->max_reqs, xprt->min_reqs,
xprt->num_reqs, xprt->binding.qlen, xprt->sending.qlen,
xprt->pending.qlen, xprt->backlog.qlen);
xprt_put(xprt);
return ret + 1;
}
static ssize_t rpc_sysfs_xprt_dstaddr_store(struct kobject *kobj,
struct kobj_attribute *attr,
const char *buf, size_t count)
@ -205,8 +226,12 @@ static const void *rpc_sysfs_xprt_namespace(struct kobject *kobj)
static struct kobj_attribute rpc_sysfs_xprt_dstaddr = __ATTR(dstaddr,
0644, rpc_sysfs_xprt_dstaddr_show, rpc_sysfs_xprt_dstaddr_store);
static struct kobj_attribute rpc_sysfs_xprt_info = __ATTR(xprt_info,
0444, rpc_sysfs_xprt_info_show, NULL);
static struct attribute *rpc_sysfs_xprt_attrs[] = {
&rpc_sysfs_xprt_dstaddr.attr,
&rpc_sysfs_xprt_info.attr,
NULL,
};