File 0009-fabrics-ensure-zero-kato-for-non-persistent-controllers.patch of Package nvme-cli.20931

From: Martin George <marting@netapp.com>
Date: Wed, 3 Mar 2021 11:49:19 +0530
Subject: [PATCH] fabrics: ensure zero kato for non-persistent controllers
References: bsc#1182591
Git-commit: a67d001330ae1c407aa4f8491436bb2d0128d47f

Add a helper function that sets the default kato value for the
discovery controllers. Along with ensuring a non-zero kato value
(i.e. NVMF_DEF_DISC_TMO) is passed to a persistent discovery
controller, it also ensures a zero kato value is passed to a
non-persistent discovery controller, as mandated by the NVMe spec.

Signed-off-by: Martin George <marting@netapp.com>
---
 fabrics.c |   17 +++++++++++++----
 1 file changed, 13 insertions(+), 4 deletions(-)

--- a/fabrics.c
+++ b/fabrics.c
@@ -855,6 +855,16 @@ static int build_options(char *argstr, i
 	return 0;
 }
 
+static void set_discovery_kato(struct config *cfg)
+{
+	/* Set kato to NVMF_DEF_DISC_TMO for persistent controllers */
+	if (cfg->persistent && !cfg->keep_alive_tmo)
+		cfg->keep_alive_tmo = NVMF_DEF_DISC_TMO;
+	/* Set kato to zero for non-persistent controllers */
+	else if (!cfg->persistent && (cfg->keep_alive_tmo > 0))
+		cfg->keep_alive_tmo = 0;
+}
+
 static int connect_ctrl(struct nvmf_disc_rsp_page_entry *e)
 {
 	char argstr[BUF_SIZE], *p;
@@ -1220,8 +1230,7 @@ static int discover_from_conf_file(const
 		if (err)
 			continue;
 
-		if (cfg.persistent && !cfg.keep_alive_tmo)
-			cfg.keep_alive_tmo = NVMF_DEF_DISC_TMO;
+		set_discovery_kato(&cfg);
 
 		err = build_options(argstr, BUF_SIZE, true);
 		if (err) {
@@ -1286,8 +1295,8 @@ int discover(const char *desc, int argc,
 	if (!cfg.transport && !cfg.traddr) {
 		ret = discover_from_conf_file(desc, argstr, opts, connect);
 	} else {
-		if (cfg.persistent && !cfg.keep_alive_tmo)
-			cfg.keep_alive_tmo = NVMF_DEF_DISC_TMO;
+		set_discovery_kato(&cfg);
+
 		ret = build_options(argstr, BUF_SIZE, true);
 		if (ret)
 			goto out;