[PATCH v8 11/13] sunrpc: provide transport info in the sysfs directory
From: Olga Kornievskaia <hidden>
Date: 2021-06-01 22:09:51
Subsystem:
kernel nfsd, sunrpc, and lockd servers, networking [general], nfs, sunrpc, and lockd clients, the rest · Maintainers:
Chuck Lever, Jeff Layton, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Trond Myklebust, Anna Schumaker, Linus Torvalds
From: Olga Kornievskaia <redacted> 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 <redacted> --- net/sunrpc/sysfs.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+)
diff --git a/net/sunrpc/sysfs.c b/net/sunrpc/sysfs.c
index f330148433c8..dc97c16e4ff6 100644
--- a/net/sunrpc/sysfs.c
+++ b/net/sunrpc/sysfs.c@@ -82,6 +82,27 @@ 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)
@@ -200,8 +221,12 @@ 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, };
--
2.27.0