From 46f0460602740767079c2d856134a664be45c42f Mon Sep 17 00:00:00 2001
From: Bart Van Assche <bvanassche@acm.org>
Date: Mon, 13 Jun 2011 12:26:51 +0000
Subject: [PATCH] ib_srpt: Export RDMA channel state to sysfs

git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@3572 d57e44dd-8a1f-0410-8b47-8ef2f437770f
---
 srpt/src/ib_srpt.c | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/srpt/src/ib_srpt.c b/srpt/src/ib_srpt.c
index efa37f356..27e113ce0 100644
--- a/srpt/src/ib_srpt.c
+++ b/srpt/src/ib_srpt.c
@@ -3423,14 +3423,47 @@ static ssize_t show_req_lim_delta(struct kobject *kobj,
 	return sprintf(buf, "%d\n", ch->req_lim_delta);
 }
 
+static const char *get_ch_state_name(enum rdma_ch_state s)
+{
+	switch (s) {
+	case CH_CONNECTING:
+		return "connecting";
+	case CH_LIVE:
+		return "live";
+	case CH_DISCONNECTING:
+		return "disconnecting";
+	case CH_DRAINING:
+		return "draining";
+	case CH_RELEASING:
+		return "releasing";
+	}
+	return "???";
+}
+
+static ssize_t show_ch_state(struct kobject *kobj, struct kobj_attribute *attr,
+			     char *buf)
+{
+	struct scst_session *scst_sess;
+	struct srpt_rdma_ch *ch;
+
+	scst_sess = container_of(kobj, struct scst_session, sess_kobj);
+	ch = scst_sess_get_tgt_priv(scst_sess);
+	if (!ch)
+		return -ENOENT;
+	return sprintf(buf, "%s\n", get_ch_state_name(ch->state));
+}
+
 static const struct kobj_attribute srpt_req_lim_attr =
 	__ATTR(req_lim,       S_IRUGO, show_req_lim,       NULL);
 static const struct kobj_attribute srpt_req_lim_delta_attr =
 	__ATTR(req_lim_delta, S_IRUGO, show_req_lim_delta, NULL);
+static const struct kobj_attribute srpt_ch_state_attr =
+	__ATTR(ch_state, S_IRUGO, show_ch_state, NULL);
 
 static const struct attribute *srpt_sess_attrs[] = {
 	&srpt_req_lim_attr.attr,
 	&srpt_req_lim_delta_attr.attr,
+	&srpt_ch_state_attr.attr,
 	NULL
 };
 #endif