From: Ursula Braun <ubraun@linux.ibm.com>
To: davem@davemloft.net
Cc: netdev@vger.kernel.org, linux-s390@vger.kernel.org,
schwidefsky@de.ibm.com, heiko.carstens@de.ibm.com,
raspl@linux.ibm.com, linux-kernel@vger.kernel.org
Subject: [PATCH net-next 1/1] net/smc: send response to test link signal
Date: Fri, 10 Aug 2018 17:45:11 +0200 [thread overview]
Message-ID: <20180810154511.71106-1-ubraun@linux.ibm.com> (raw)
With SMC-D z/OS sends a test link signal every 10 seconds. Linux is
supposed to answer, otherwise the SMC-D connection breaks.
Signed-off-by: Ursula Braun <ubraun@linux.ibm.com>
---
net/smc/smc_ism.c | 34 ++++++++++++++++++++++++++++++++++
1 file changed, 34 insertions(+)
diff --git a/net/smc/smc_ism.c b/net/smc/smc_ism.c
index cfade7fdcc6d..e36f21ce7252 100644
--- a/net/smc/smc_ism.c
+++ b/net/smc/smc_ism.c
@@ -184,6 +184,37 @@ struct smc_ism_event_work {
struct smcd_event event;
};
+#define ISM_EVENT_REQUEST 0x0001
+#define ISM_EVENT_RESPONSE 0x0002
+#define ISM_EVENT_REQUEST_IR 0x00000001
+#define ISM_EVENT_CODE_TESTLINK 0x83
+
+static void smcd_handle_sw_event(struct smc_ism_event_work *wrk)
+{
+ union {
+ u64 info;
+ struct {
+ u32 uid;
+ unsigned short vlanid;
+ u16 code;
+ };
+ } ev_info;
+
+ switch (wrk->event.code) {
+ case ISM_EVENT_CODE_TESTLINK: /* Activity timer */
+ ev_info.info = wrk->event.info;
+ if (ev_info.code == ISM_EVENT_REQUEST) {
+ ev_info.code = ISM_EVENT_RESPONSE;
+ wrk->smcd->ops->signal_event(wrk->smcd,
+ wrk->event.tok,
+ ISM_EVENT_REQUEST_IR,
+ ISM_EVENT_CODE_TESTLINK,
+ ev_info.info);
+ }
+ break;
+ }
+}
+
/* worker for SMC-D events */
static void smc_ism_event_work(struct work_struct *work)
{
@@ -196,6 +227,9 @@ static void smc_ism_event_work(struct work_struct *work)
break;
case ISM_EVENT_DMB:
break;
+ case ISM_EVENT_SWR: /* Software defined event */
+ smcd_handle_sw_event(wrk);
+ break;
}
kfree(wrk);
}
--
2.16.4
next reply other threads:[~2018-08-10 15:45 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-10 15:45 Ursula Braun [this message]
2018-08-10 21:39 ` [PATCH net-next 1/1] net/smc: send response to test link signal David Miller
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20180810154511.71106-1-ubraun@linux.ibm.com \
--to=ubraun@linux.ibm.com \
--cc=davem@davemloft.net \
--cc=heiko.carstens@de.ibm.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-s390@vger.kernel.org \
--cc=netdev@vger.kernel.org \
--cc=raspl@linux.ibm.com \
--cc=schwidefsky@de.ibm.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).