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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: Olga Kornievskaia <kolga@netapp.com> Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
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@ -111,6 +111,49 @@ static ssize_t rpc_sysfs_xprt_info_show(struct kobject *kobj,
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return ret + 1;
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}
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static ssize_t rpc_sysfs_xprt_state_show(struct kobject *kobj,
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struct kobj_attribute *attr,
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char *buf)
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{
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struct rpc_xprt *xprt = rpc_sysfs_xprt_kobj_get_xprt(kobj);
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ssize_t ret;
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int locked, connected, connecting, close_wait, bound, binding,
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closing, congested, cwnd_wait, write_space;
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if (!xprt)
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return 0;
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if (!xprt->state) {
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ret = sprintf(buf, "state=CLOSED\n");
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} else {
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locked = test_bit(XPRT_LOCKED, &xprt->state);
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connected = test_bit(XPRT_CONNECTED, &xprt->state);
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connecting = test_bit(XPRT_CONNECTING, &xprt->state);
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close_wait = test_bit(XPRT_CLOSE_WAIT, &xprt->state);
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bound = test_bit(XPRT_BOUND, &xprt->state);
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binding = test_bit(XPRT_BINDING, &xprt->state);
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closing = test_bit(XPRT_CLOSING, &xprt->state);
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congested = test_bit(XPRT_CONGESTED, &xprt->state);
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cwnd_wait = test_bit(XPRT_CWND_WAIT, &xprt->state);
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write_space = test_bit(XPRT_WRITE_SPACE, &xprt->state);
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ret = sprintf(buf, "state=%s %s %s %s %s %s %s %s %s %s\n",
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locked ? "LOCKED" : "",
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connected ? "CONNECTED" : "",
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connecting ? "CONNECTING" : "",
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close_wait ? "CLOSE_WAIT" : "",
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bound ? "BOUND" : "",
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binding ? "BOUNDING" : "",
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closing ? "CLOSING" : "",
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congested ? "CONGESTED" : "",
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cwnd_wait ? "CWND_WAIT" : "",
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write_space ? "WRITE_SPACE" : "");
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}
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xprt_put(xprt);
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return ret + 1;
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}
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static ssize_t rpc_sysfs_xprt_switch_info_show(struct kobject *kobj,
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struct kobj_attribute *attr,
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char *buf)
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@ -255,9 +298,13 @@ static struct kobj_attribute rpc_sysfs_xprt_dstaddr = __ATTR(dstaddr,
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static struct kobj_attribute rpc_sysfs_xprt_info = __ATTR(xprt_info,
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0444, rpc_sysfs_xprt_info_show, NULL);
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static struct kobj_attribute rpc_sysfs_xprt_change_state = __ATTR(xprt_state,
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0644, rpc_sysfs_xprt_state_show, NULL);
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static struct attribute *rpc_sysfs_xprt_attrs[] = {
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&rpc_sysfs_xprt_dstaddr.attr,
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&rpc_sysfs_xprt_info.attr,
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&rpc_sysfs_xprt_change_state.attr,
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NULL,
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};
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