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net/smc: determine proposed ISM devices

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SMCD Version 2 allows to propose up to 8 additional ISM devices
offered to the peer as candidates for SMCD communication.
This patch covers determination of the ISM devices to be proposed.
ISM devices without PNETID are preferred, since ISM devices with
PNETID are a V1 leftover and will disappear over the time.

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>
This commit is contained in:
Ursula Braun
2020-09-26 12:44:27 +02:00
committed by David S. Miller
parent e888a2e833
commit d70bf4f7a9
8 changed files with 135 additions and 58 deletions
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11
net/smc/smc_clc.c
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@@ -410,8 +410,7 @@ int smc_clc_send_decline(struct smc_sock *smc, u32 peer_diag_info)
}
/* send CLC PROPOSAL message across internal TCP socket */
int smc_clc_send_proposal(struct smc_sock *smc, int smc_type,
struct smc_init_info *ini)
int smc_clc_send_proposal(struct smc_sock *smc, struct smc_init_info *ini)
{
struct smc_clc_msg_proposal_prefix *pclc_prfx;
struct smc_clc_msg_proposal *pclc_base;
@@ -449,8 +448,8 @@ int smc_clc_send_proposal(struct smc_sock *smc, int smc_type,
sizeof(SMC_EYECATCHER));
pclc_base->hdr.type = SMC_CLC_PROPOSAL;
pclc_base->hdr.version = SMC_V1; /* SMC version */
pclc_base->hdr.typev1 = smc_type;
if (smcr_indicated(smc_type)) {
pclc_base->hdr.typev1 = ini->smc_type_v1;
if (smcr_indicated(ini->smc_type_v1)) {
/* add SMC-R specifics */
memcpy(pclc_base->lcl.id_for_peer, local_systemid,
sizeof(local_systemid));
@@ -459,7 +458,7 @@ int smc_clc_send_proposal(struct smc_sock *smc, int smc_type,
ETH_ALEN);
pclc_base->iparea_offset = htons(0);
}
if (smcd_indicated(smc_type)) {
if (smcd_indicated(ini->smc_type_v1)) {
/* add SMC-D specifics */
plen += sizeof(*pclc_smcd);
pclc_base->iparea_offset = htons(sizeof(*pclc_smcd));
@@ -472,7 +471,7 @@ int smc_clc_send_proposal(struct smc_sock *smc, int smc_type,
i = 0;
vec[i].iov_base = pclc_base;
vec[i++].iov_len = sizeof(*pclc_base);
if (smcd_indicated(smc_type)) {
if (smcd_indicated(ini->smc_type_v1)) {
vec[i].iov_base = pclc_smcd;
vec[i++].iov_len = sizeof(*pclc_smcd);
}