linux-kernel - [PATCH net-next 4/6] net/smc: Use sysctl-specified types of buffers in new link group

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Message-Id: <1657626690-60367-5-git-send-email-guwen@linux.alibaba.com>
Date:   Tue, 12 Jul 2022 19:51:28 +0800
From:   Wen Gu <guwen@...ux.alibaba.com>
To:     kgraul@...ux.ibm.com, wenjia@...ux.ibm.com, davem@...emloft.net,
        edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com
Cc:     linux-s390@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH net-next 4/6] net/smc: Use sysctl-specified types of buffers in new link group

This patch introduces a new SMC-R specific element buf_type
in struct smc_link_group, for recording the value of sysctl
smcr_buf_type when link group is created.

New created link group will create and reuse buffers of the
type specified by buf_type.

Signed-off-by: Wen Gu <guwen@...ux.alibaba.com>
---
 net/smc/smc_core.c | 1 +
 net/smc/smc_core.h | 1 +
 2 files changed, 2 insertions(+)

diff --git a/net/smc/smc_core.c b/net/smc/smc_core.c
index fa3a7a8..86afbbc 100644
--- a/net/smc/smc_core.c
+++ b/net/smc/smc_core.c
@@ -907,6 +907,7 @@ static int smc_lgr_create(struct smc_sock *smc, struct smc_init_info *ini)
 		lgr->net = smc_ib_net(lnk->smcibdev);
 		lgr_list = &smc_lgr_list.list;
 		lgr_lock = &smc_lgr_list.lock;
+		lgr->buf_type = lgr->net->smc.sysctl_smcr_buf_type;
 		atomic_inc(&lgr_cnt);
 	}
 	smc->conn.lgr = lgr;
diff --git a/net/smc/smc_core.h b/net/smc/smc_core.h
index 7652dfa..0261124 100644
--- a/net/smc/smc_core.h
+++ b/net/smc/smc_core.h
@@ -284,6 +284,7 @@ struct smc_link_group {
 						/* used rtoken elements */
 			u8			next_link_id;
 			enum smc_lgr_type	type;
+			enum smcr_buf_type	buf_type;
 						/* redundancy state */
 			u8			pnet_id[SMC_MAX_PNETID_LEN + 1];
 						/* pnet id of this lgr */
-- 
1.8.3.1