net/smc: split CLC confirm/accept data to be sent
When sending CLC confirm and CLC accept, separate the trailing
part of the message from the initial part (to be prepared for
future first contact extension).
Signed-off-by: Ursula Braun <ubraun@linux.ibm.com>
Signed-off-by: Karsten Graul <kgraul@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/smc/smc_clc.c b/net/smc/smc_clc.c
index 85b41c1..3cc3a2e 100644
--- a/net/smc/smc_clc.c
+++ b/net/smc/smc_clc.c
@@ -505,8 +505,10 @@ static int smc_clc_send_confirm_accept(struct smc_sock *smc,
int first_contact)
{
struct smc_connection *conn = &smc->conn;
+ struct smc_clc_msg_trail trl;
+ struct kvec vec[2];
struct msghdr msg;
- struct kvec vec;
+ int i;
/* send SMC Confirm CLC msg */
clc->hdr.version = SMC_V1; /* SMC version */
@@ -523,7 +525,7 @@ static int smc_clc_send_confirm_accept(struct smc_sock *smc,
clc->d0.dmbe_size = conn->rmbe_size_short;
clc->d0.dmbe_idx = 0;
memcpy(&clc->d0.linkid, conn->lgr->id, SMC_LGR_ID_SIZE);
- memcpy(clc->d0.smcd_trl.eyecatcher, SMCD_EYECATCHER,
+ memcpy(trl.eyecatcher, SMCD_EYECATCHER,
sizeof(SMCD_EYECATCHER));
} else {
struct smc_link *link = conn->lnk;
@@ -556,14 +558,19 @@ static int smc_clc_send_confirm_accept(struct smc_sock *smc,
clc->r0.rmb_dma_addr = cpu_to_be64((u64)sg_dma_address
(conn->rmb_desc->sgt[link->link_idx].sgl));
hton24(clc->r0.psn, link->psn_initial);
- memcpy(clc->r0.smcr_trl.eyecatcher, SMC_EYECATCHER,
- sizeof(SMC_EYECATCHER));
+ memcpy(trl.eyecatcher, SMC_EYECATCHER, sizeof(SMC_EYECATCHER));
}
memset(&msg, 0, sizeof(msg));
- vec.iov_base = clc;
- vec.iov_len = ntohs(clc->hdr.length);
- return kernel_sendmsg(smc->clcsock, &msg, &vec, 1,
+ i = 0;
+ vec[i].iov_base = clc;
+ vec[i++].iov_len = (clc->hdr.typev1 == SMC_TYPE_D ?
+ SMCD_CLC_ACCEPT_CONFIRM_LEN :
+ SMCR_CLC_ACCEPT_CONFIRM_LEN) -
+ sizeof(trl);
+ vec[i].iov_base = &trl;
+ vec[i++].iov_len = sizeof(trl);
+ return kernel_sendmsg(smc->clcsock, &msg, vec, 1,
ntohs(clc->hdr.length));
}