linux-kernel - [PATCH net-next 08/18] net/smc: enable virtual ISM device feature bit

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Date:   Tue, 19 Sep 2023 22:41:52 +0800
From:   Wen Gu <guwen@...ux.alibaba.com>
To:     kgraul@...ux.ibm.com, wenjia@...ux.ibm.com, jaka@...ux.ibm.com,
        davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com
Cc:     alibuda@...ux.alibaba.com, tonylu@...ux.alibaba.com,
        guwen@...ux.alibaba.com, linux-s390@...r.kernel.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH net-next 08/18] net/smc: enable virtual ISM device feature bit

This patch enables the first supplement feature of SMCv2.1, that
is the support for virtual ISM devices.

Signed-off-by: Wen Gu <guwen@...ux.alibaba.com>
---
 net/smc/af_smc.c | 2 ++
 net/smc/smc.h    | 7 +++++++
 2 files changed, 9 insertions(+)

diff --git a/net/smc/af_smc.c b/net/smc/af_smc.c
index 9e31033..7eab600 100644
--- a/net/smc/af_smc.c
+++ b/net/smc/af_smc.c
@@ -1522,6 +1522,7 @@ static int __smc_connect(struct smc_sock *smc)
 	ini->smcr_version = SMC_V1 | SMC_V2;
 	ini->smc_type_v1 = SMC_TYPE_B;
 	ini->smc_type_v2 = SMC_TYPE_B;
+	ini->feature_mask = SMC_FEATURE_MASK;
 
 	/* get vlan id from IP device */
 	if (smc_vlan_by_tcpsk(smc->clcsock, ini)) {
@@ -1987,6 +1988,7 @@ static int smc_listen_v2_check(struct smc_sock *new_smc,
 	ini->smc_type_v2 = pclc->hdr.typev2;
 	ini->smcd_version = smcd_indicated(ini->smc_type_v1) ? SMC_V1 : 0;
 	ini->smcr_version = smcr_indicated(ini->smc_type_v1) ? SMC_V1 : 0;
+	ini->feature_mask = SMC_FEATURE_MASK;
 	if (pclc->hdr.version > SMC_V1) {
 		if (smcd_indicated(ini->smc_type_v2))
 			ini->smcd_version |= SMC_V2;
diff --git a/net/smc/smc.h b/net/smc/smc.h
index 24745fd..71b9640 100644
--- a/net/smc/smc.h
+++ b/net/smc/smc.h
@@ -58,6 +58,13 @@ enum smc_state {		/* possible states of an SMC socket */
 	SMC_PROCESSABORT	= 27,
 };
 
+enum smc_supp_feature {	/* supplemental features supported by current version */
+	SMC_SPF_VIRT_ISM_DEV	= 0,
+};
+
+#define SMC_FEATURE_MASK \
+	(BIT(SMC_SPF_VIRT_ISM_DEV))
+
 struct smc_link_group;
 
 struct smc_wr_rx_hdr {	/* common prefix part of LLC and CDC to demultiplex */
-- 
1.8.3.1