Commit 681d5699 authored by Olga Kornievskaia's avatar Olga Kornievskaia Committed by Trond Myklebust
Browse files

sunrpc: provide showing transport's state info in the sysfs directory 



In preparation of being able to change the xprt's state, add a way
to show currect state of the transport.

Signed-off-by: default avatarOlga Kornievskaia <kolga@netapp.com>
Signed-off-by: default avatarTrond Myklebust <trond.myklebust@hammerspace.com>
parent 0e559035

net/sunrpc/sysfs.c

+47 −0
Original line number Diff line number Diff line
@@ -111,6 +111,49 @@ static ssize_t rpc_sysfs_xprt_info_show(struct kobject *kobj, 
	return ret + 1;

}



static ssize_t rpc_sysfs_xprt_state_show(struct kobject *kobj,

					 struct kobj_attribute *attr,

					 char *buf)

{

	struct rpc_xprt *xprt = rpc_sysfs_xprt_kobj_get_xprt(kobj);

	ssize_t ret;

	int locked, connected, connecting, close_wait, bound, binding,

	    closing, congested, cwnd_wait, write_space;



	if (!xprt)

		return 0;



	if (!xprt->state) {

		ret = sprintf(buf, "state=CLOSED\n");

	} else {

		locked = test_bit(XPRT_LOCKED, &xprt->state);

		connected = test_bit(XPRT_CONNECTED, &xprt->state);

		connecting = test_bit(XPRT_CONNECTING, &xprt->state);

		close_wait = test_bit(XPRT_CLOSE_WAIT, &xprt->state);

		bound = test_bit(XPRT_BOUND, &xprt->state);

		binding = test_bit(XPRT_BINDING, &xprt->state);

		closing = test_bit(XPRT_CLOSING, &xprt->state);

		congested = test_bit(XPRT_CONGESTED, &xprt->state);

		cwnd_wait = test_bit(XPRT_CWND_WAIT, &xprt->state);

		write_space = test_bit(XPRT_WRITE_SPACE, &xprt->state);



		ret = sprintf(buf, "state=%s %s %s %s %s %s %s %s %s %s\n",

			      locked ? "LOCKED" : "",

			      connected ? "CONNECTED" : "",

			      connecting ? "CONNECTING" : "",

			      close_wait ? "CLOSE_WAIT" : "",

			      bound ? "BOUND" : "",

			      binding ? "BOUNDING" : "",

			      closing ? "CLOSING" : "",

			      congested ? "CONGESTED" : "",

			      cwnd_wait ? "CWND_WAIT" : "",

			      write_space ? "WRITE_SPACE" : "");

	}



	xprt_put(xprt);

	return ret + 1;

}



static ssize_t rpc_sysfs_xprt_switch_info_show(struct kobject *kobj,

					       struct kobj_attribute *attr,

					       char *buf)
@@ -255,9 +298,13 @@ static struct kobj_attribute rpc_sysfs_xprt_dstaddr = __ATTR(dstaddr, 
static struct kobj_attribute rpc_sysfs_xprt_info = __ATTR(xprt_info,

	0444, rpc_sysfs_xprt_info_show, NULL);



static struct kobj_attribute rpc_sysfs_xprt_change_state = __ATTR(xprt_state,

	0644, rpc_sysfs_xprt_state_show, NULL);



static struct attribute *rpc_sysfs_xprt_attrs[] = {

	&rpc_sysfs_xprt_dstaddr.attr,

	&rpc_sysfs_xprt_info.attr,

	&rpc_sysfs_xprt_change_state.attr,

	NULL,

};