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smc: connection and link group creation

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* create smc_connection for SMC-sockets
* determine suitable link group for a connection
* create a new link group if necessary

Signed-off-by: Ursula Braun <ubraun@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ursula Braun
2017-01-09 16:55:17 +01:00
committed by David S. Miller
parent a046d57da1
commit 0cfdd8f92c
7 changed files with 605 additions and 17 deletions
Download Patch File Download Diff File Expand all files Collapse all files

38
net/smc/smc_clc.c
View File

@@ -14,6 +14,7 @@
#include <net/tcp.h>
#include "smc.h"
#include "smc_core.h"
#include "smc_clc.h"
#include "smc_ib.h"
@@ -89,8 +90,13 @@ int smc_clc_wait_msg(struct smc_sock *smc, void *buf, int buflen,
reason_code = -EPROTO;
goto out;
}
if (clcm->type == SMC_CLC_DECLINE)
if (clcm->type == SMC_CLC_DECLINE) {
reason_code = SMC_CLC_DECL_REPLY;
if (ntohl(((struct smc_clc_msg_decline *)buf)->peer_diagnosis)
== SMC_CLC_DECL_SYNCERR)
smc->conn.lgr->sync_err = true;
}
out:
return reason_code;
}
@@ -175,12 +181,15 @@ int smc_clc_send_proposal(struct smc_sock *smc,
/* send CLC CONFIRM message across internal TCP socket */
int smc_clc_send_confirm(struct smc_sock *smc)
{
struct smc_connection *conn = &smc->conn;
struct smc_clc_msg_accept_confirm cclc;
struct smc_link *link;
int reason_code = 0;
struct msghdr msg;
struct kvec vec;
int len;
link = &conn->lgr->lnk[SMC_SINGLE_LINK];
/* send SMC Confirm CLC msg */
memset(&cclc, 0, sizeof(cclc));
memcpy(cclc.hdr.eyecatcher, SMC_EYECATCHER, sizeof(SMC_EYECATCHER));
@@ -188,12 +197,18 @@ int smc_clc_send_confirm(struct smc_sock *smc)
cclc.hdr.length = htons(sizeof(cclc));
cclc.hdr.version = SMC_CLC_V1; /* SMC version */
memcpy(cclc.lcl.id_for_peer, local_systemid, sizeof(local_systemid));
/* tbd in follow-on patch: fill in link-related values */
memcpy(&cclc.lcl.gid, &link->smcibdev->gid[link->ibport - 1],
SMC_GID_SIZE);
memcpy(&cclc.lcl.mac, &link->smcibdev->mac[link->ibport - 1],
sizeof(link->smcibdev->mac));
/* tbd in follow-on patch: fill in rmb-related values */
hton24(cclc.qpn, link->roce_qp->qp_num);
cclc.conn_idx = 1; /* for now: 1 RMB = 1 RMBE */
cclc.rmbe_alert_token = htonl(conn->alert_token_local);
cclc.qp_mtu = min(link->path_mtu, link->peer_mtu);
hton24(cclc.psn, link->psn_initial);
memcpy(cclc.trl.eyecatcher, SMC_EYECATCHER, sizeof(SMC_EYECATCHER));
@@ -214,26 +229,37 @@ int smc_clc_send_confirm(struct smc_sock *smc)
}
/* send CLC ACCEPT message across internal TCP socket */
int smc_clc_send_accept(struct smc_sock *new_smc)
int smc_clc_send_accept(struct smc_sock *new_smc, int srv_first_contact)
{
struct smc_connection *conn = &new_smc->conn;
struct smc_clc_msg_accept_confirm aclc;
struct smc_link *link;
struct msghdr msg;
struct kvec vec;
int rc = 0;
int len;
link = &conn->lgr->lnk[SMC_SINGLE_LINK];
memset(&aclc, 0, sizeof(aclc));
memcpy(aclc.hdr.eyecatcher, SMC_EYECATCHER, sizeof(SMC_EYECATCHER));
aclc.hdr.type = SMC_CLC_ACCEPT;
aclc.hdr.length = htons(sizeof(aclc));
aclc.hdr.version = SMC_CLC_V1; /* SMC version */
if (srv_first_contact)
aclc.hdr.flag = 1;
memcpy(aclc.lcl.id_for_peer, local_systemid, sizeof(local_systemid));
/* tbd in follow-on patch: fill in link-related values */
memcpy(&aclc.lcl.gid, &link->smcibdev->gid[link->ibport - 1],
SMC_GID_SIZE);
memcpy(&aclc.lcl.mac, link->smcibdev->mac[link->ibport - 1],
sizeof(link->smcibdev->mac[link->ibport - 1]));
/* tbd in follow-on patch: fill in rmb-related values */
hton24(aclc.qpn, link->roce_qp->qp_num);
aclc.conn_idx = 1; /* as long as 1 RMB = 1 RMBE */
aclc.rmbe_alert_token = htonl(conn->alert_token_local);
aclc.qp_mtu = link->path_mtu;
hton24(aclc.psn, link->psn_initial);
memcpy(aclc.trl.eyecatcher, SMC_EYECATCHER, sizeof(SMC_EYECATCHER));
memset(&msg, 0, sizeof(msg));