[PATCH v8 12/13] sunrpc: provide multipath info in the sysfs directory
From: Olga Kornievskaia <hidden>
Date: 2021-06-01 22:09:52
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 xrpt_switch attributes. Currently showing the following
fields of the rpc_xprt_switch structure: xps_nxprts, xps_nactive,
xps_queuelen.
Signed-off-by: Olga Kornievskaia <redacted>
---
net/sunrpc/sysfs.c | 35 +++++++++++++++++++++++++++++++++++
1 file changed, 35 insertions(+)
diff --git a/net/sunrpc/sysfs.c b/net/sunrpc/sysfs.c
index dc97c16e4ff6..db2ae28bd0c3 100644
--- a/net/sunrpc/sysfs.c
+++ b/net/sunrpc/sysfs.c
@@ -68,6 +68,15 @@ rpc_sysfs_xprt_kobj_get_xprt(struct kobject *kobj)
return xprt_get(x->xprt);
}
+static inline struct rpc_xprt_switch *
+rpc_sysfs_xprt_switch_kobj_get_xprt(struct kobject *kobj)
+{
+ struct rpc_sysfs_xprt_switch *x = container_of(kobj,
+ struct rpc_sysfs_xprt_switch, kobject);
+
+ return xprt_switch_get(x->xprt_switch);
+}
+
static ssize_t rpc_sysfs_xprt_dstaddr_show(struct kobject *kobj,
struct kobj_attribute *attr,
char *buf)@@ -103,6 +112,23 @@ static ssize_t rpc_sysfs_xprt_info_show(struct kobject *kobj,
return ret + 1;
}
+static ssize_t rpc_sysfs_xprt_switch_info_show(struct kobject *kobj,
+ struct kobj_attribute *attr,
+ char *buf)
+{
+ struct rpc_xprt_switch *xprt_switch =
+ rpc_sysfs_xprt_switch_kobj_get_xprt(kobj);
+ ssize_t ret;
+
+ if (!xprt_switch)
+ return 0;
+ ret = sprintf(buf, "num_xprts=%u\nnum_active=%u\nqueue_len=%ld\n",
+ xprt_switch->xps_nxprts, xprt_switch->xps_nactive,
+ atomic_long_read(&xprt_switch->xps_queuelen));
+ xprt_switch_put(xprt_switch);
+ return ret + 1;
+}
+
static ssize_t rpc_sysfs_xprt_dstaddr_store(struct kobject *kobj,
struct kobj_attribute *attr,
const char *buf, size_t count)@@ -230,6 +256,14 @@ static struct attribute *rpc_sysfs_xprt_attrs[] = {
NULL,
};
+static struct kobj_attribute rpc_sysfs_xprt_switch_info =
+ __ATTR(xprt_switch_info, 0444, rpc_sysfs_xprt_switch_info_show, NULL);
+
+static struct attribute *rpc_sysfs_xprt_switch_attrs[] = {
+ &rpc_sysfs_xprt_switch_info.attr,
+ NULL,
+};
+
static struct kobj_type rpc_sysfs_client_type = {
.release = rpc_sysfs_client_release,
.sysfs_ops = &kobj_sysfs_ops,@@ -238,6 +272,7 @@ static struct kobj_type rpc_sysfs_client_type = {
static struct kobj_type rpc_sysfs_xprt_switch_type = {
.release = rpc_sysfs_xprt_switch_release,
+ .default_attrs = rpc_sysfs_xprt_switch_attrs,
.sysfs_ops = &kobj_sysfs_ops,
.namespace = rpc_sysfs_xprt_switch_namespace,
};--
2.27.0