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

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

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 15:59:22 -04:00 committed by Trond Myklebust
parent 0e55903587
commit 681d5699cb
1 changed files with 47 additions and 0 deletions
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47
net/sunrpc/sysfs.c
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@ -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,
};