Kernel/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2025-01-07 21:53:44 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

net/smc: introduce sub-functions for smc_clc_send_confirm_accept()

Browse Source 
There is a large if-else block in smc_clc_send_confirm_accept() and it
is better to split it into two sub-functions.

Suggested-by: Alexandra Winter <wintera@linux.ibm.com>
Signed-off-by: Wen Gu <guwen@linux.alibaba.com>
Reviewed-by: Alexandra Winter <wintera@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Wen Gu 2023-12-19 22:26:08 +08:00 committed by David S. Miller
parent ac053a169c
commit 5205ac4483
1 changed files with 115 additions and 82 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

197
net/smc/smc_clc.c
View File

@ -998,6 +998,112 @@ int smc_clc_send_proposal(struct smc_sock *smc, struct smc_init_info *ini)
return reason_code;
}
static void
smcd_clc_prep_confirm_accept(struct smc_connection *conn,
struct smc_clc_msg_accept_confirm_v2 *clc_v2,
int first_contact, u8 version,
u8 *eid, struct smc_init_info *ini,
int *fce_len,
struct smc_clc_first_contact_ext_v2x *fce_v2x,
struct smc_clc_msg_trail *trl)
{
struct smcd_dev *smcd = conn->lgr->smcd;
struct smc_clc_msg_accept_confirm *clc;
int len;
/* SMC-D specific settings */
clc = (struct smc_clc_msg_accept_confirm *)clc_v2;
memcpy(clc->hdr.eyecatcher, SMCD_EYECATCHER,
sizeof(SMCD_EYECATCHER));
clc->hdr.typev1 = SMC_TYPE_D;
clc->d0.gid = htonll(smcd->ops->get_local_gid(smcd));
clc->d0.token = htonll(conn->rmb_desc->token);
clc->d0.dmbe_size = conn->rmbe_size_comp;
clc->d0.dmbe_idx = 0;
memcpy(&clc->d0.linkid, conn->lgr->id, SMC_LGR_ID_SIZE);
if (version == SMC_V1) {
clc->hdr.length = htons(SMCD_CLC_ACCEPT_CONFIRM_LEN);
} else {
clc_v2->d1.chid = htons(smc_ism_get_chid(smcd));
if (eid && eid[0])
memcpy(clc_v2->d1.eid, eid, SMC_MAX_EID_LEN);
len = SMCD_CLC_ACCEPT_CONFIRM_LEN_V2;
if (first_contact) {
*fce_len = smc_clc_fill_fce_v2x(fce_v2x, ini);
len += *fce_len;
}
clc_v2->hdr.length = htons(len);
}
memcpy(trl->eyecatcher, SMCD_EYECATCHER,
sizeof(SMCD_EYECATCHER));
}
static void
smcr_clc_prep_confirm_accept(struct smc_connection *conn,
struct smc_clc_msg_accept_confirm_v2 *clc_v2,
int first_contact, u8 version,
u8 *eid, struct smc_init_info *ini,
int *fce_len,
struct smc_clc_first_contact_ext_v2x *fce_v2x,
struct smc_clc_fce_gid_ext *gle,
struct smc_clc_msg_trail *trl)
{
struct smc_clc_msg_accept_confirm *clc;
struct smc_link *link = conn->lnk;
int len;
/* SMC-R specific settings */
clc = (struct smc_clc_msg_accept_confirm *)clc_v2;
memcpy(clc->hdr.eyecatcher, SMC_EYECATCHER,
sizeof(SMC_EYECATCHER));
clc->hdr.typev1 = SMC_TYPE_R;
memcpy(clc->r0.lcl.id_for_peer, local_systemid,
sizeof(local_systemid));
memcpy(&clc->r0.lcl.gid, link->gid, SMC_GID_SIZE);
memcpy(&clc->r0.lcl.mac, &link->smcibdev->mac[link->ibport - 1],
ETH_ALEN);
hton24(clc->r0.qpn, link->roce_qp->qp_num);
clc->r0.rmb_rkey =
htonl(conn->rmb_desc->mr[link->link_idx]->rkey);
clc->r0.rmbe_idx = 1; /* for now: 1 RMB = 1 RMBE */
clc->r0.rmbe_alert_token = htonl(conn->alert_token_local);
switch (clc->hdr.type) {
case SMC_CLC_ACCEPT:
clc->r0.qp_mtu = link->path_mtu;
break;
case SMC_CLC_CONFIRM:
clc->r0.qp_mtu = min(link->path_mtu, link->peer_mtu);
break;
}
clc->r0.rmbe_size = conn->rmbe_size_comp;
clc->r0.rmb_dma_addr = conn->rmb_desc->is_vm ?
cpu_to_be64((uintptr_t)conn->rmb_desc->cpu_addr) :
cpu_to_be64((u64)sg_dma_address
(conn->rmb_desc->sgt[link->link_idx].sgl));
hton24(clc->r0.psn, link->psn_initial);
if (version == SMC_V1) {
clc->hdr.length = htons(SMCR_CLC_ACCEPT_CONFIRM_LEN);
} else {
if (eid && eid[0])
memcpy(clc_v2->r1.eid, eid, SMC_MAX_EID_LEN);
len = SMCR_CLC_ACCEPT_CONFIRM_LEN_V2;
if (first_contact) {
*fce_len = smc_clc_fill_fce_v2x(fce_v2x, ini);
len += *fce_len;
fce_v2x->fce_v2_base.v2_direct =
!link->lgr->uses_gateway;
if (clc->hdr.type == SMC_CLC_CONFIRM) {
memset(gle, 0, sizeof(*gle));
gle->gid_cnt = ini->smcrv2.gidlist.len;
len += sizeof(*gle);
len += gle->gid_cnt * sizeof(gle->gid[0]);
}
}
clc_v2->hdr.length = htons(len);
}
memcpy(trl->eyecatcher, SMC_EYECATCHER, sizeof(SMC_EYECATCHER));
}
/* build and send CLC CONFIRM / ACCEPT message */
static int smc_clc_send_confirm_accept(struct smc_sock *smc,
struct smc_clc_msg_accept_confirm_v2 *clc_v2,
@ -1006,11 +1112,10 @@ static int smc_clc_send_confirm_accept(struct smc_sock *smc,
{
struct smc_clc_first_contact_ext_v2x fce_v2x;
struct smc_connection *conn = &smc->conn;
struct smcd_dev *smcd = conn->lgr->smcd;
struct smc_clc_msg_accept_confirm *clc;
struct smc_clc_fce_gid_ext gle;
struct smc_clc_msg_trail trl;
int i, len, fce_len;
int i, fce_len;
struct kvec vec[5];
struct msghdr msg;
@ -1019,86 +1124,14 @@ static int smc_clc_send_confirm_accept(struct smc_sock *smc,
clc->hdr.version = version; /* SMC version */
if (first_contact)
clc->hdr.typev2 |= SMC_FIRST_CONTACT_MASK;
if (conn->lgr->is_smcd) {
/* SMC-D specific settings */
memcpy(clc->hdr.eyecatcher, SMCD_EYECATCHER,
sizeof(SMCD_EYECATCHER));
clc->hdr.typev1 = SMC_TYPE_D;
clc->d0.gid = htonll(smcd->ops->get_local_gid(smcd));
clc->d0.token = htonll(conn->rmb_desc->token);
clc->d0.dmbe_size = conn->rmbe_size_comp;
clc->d0.dmbe_idx = 0;
memcpy(&clc->d0.linkid, conn->lgr->id, SMC_LGR_ID_SIZE);
if (version == SMC_V1) {
clc->hdr.length = htons(SMCD_CLC_ACCEPT_CONFIRM_LEN);
} else {
clc_v2->d1.chid = htons(smc_ism_get_chid(smcd));
if (eid && eid[0])
memcpy(clc_v2->d1.eid, eid, SMC_MAX_EID_LEN);
len = SMCD_CLC_ACCEPT_CONFIRM_LEN_V2;
if (first_contact) {
fce_len = smc_clc_fill_fce_v2x(&fce_v2x, ini);
len += fce_len;
}
clc_v2->hdr.length = htons(len);
}
memcpy(trl.eyecatcher, SMCD_EYECATCHER,
sizeof(SMCD_EYECATCHER));
} else {
struct smc_link *link = conn->lnk;
/* SMC-R specific settings */
memcpy(clc->hdr.eyecatcher, SMC_EYECATCHER,
sizeof(SMC_EYECATCHER));
clc->hdr.typev1 = SMC_TYPE_R;
clc->hdr.length = htons(SMCR_CLC_ACCEPT_CONFIRM_LEN);
memcpy(clc->r0.lcl.id_for_peer, local_systemid,
sizeof(local_systemid));
memcpy(&clc->r0.lcl.gid, link->gid, SMC_GID_SIZE);
memcpy(&clc->r0.lcl.mac, &link->smcibdev->mac[link->ibport - 1],
ETH_ALEN);
hton24(clc->r0.qpn, link->roce_qp->qp_num);
clc->r0.rmb_rkey =
htonl(conn->rmb_desc->mr[link->link_idx]->rkey);
clc->r0.rmbe_idx = 1; /* for now: 1 RMB = 1 RMBE */
clc->r0.rmbe_alert_token = htonl(conn->alert_token_local);
switch (clc->hdr.type) {
case SMC_CLC_ACCEPT:
clc->r0.qp_mtu = link->path_mtu;
break;
case SMC_CLC_CONFIRM:
clc->r0.qp_mtu = min(link->path_mtu, link->peer_mtu);
break;
}
clc->r0.rmbe_size = conn->rmbe_size_comp;
clc->r0.rmb_dma_addr = conn->rmb_desc->is_vm ?
cpu_to_be64((uintptr_t)conn->rmb_desc->cpu_addr) :
cpu_to_be64((u64)sg_dma_address
(conn->rmb_desc->sgt[link->link_idx].sgl));
hton24(clc->r0.psn, link->psn_initial);
if (version == SMC_V1) {
clc->hdr.length = htons(SMCR_CLC_ACCEPT_CONFIRM_LEN);
} else {
if (eid && eid[0])
memcpy(clc_v2->r1.eid, eid, SMC_MAX_EID_LEN);
len = SMCR_CLC_ACCEPT_CONFIRM_LEN_V2;
if (first_contact) {
fce_len = smc_clc_fill_fce_v2x(&fce_v2x, ini);
len += fce_len;
fce_v2x.fce_v2_base.v2_direct =
!link->lgr->uses_gateway;
if (clc->hdr.type == SMC_CLC_CONFIRM) {
memset(&gle, 0, sizeof(gle));
gle.gid_cnt = ini->smcrv2.gidlist.len;
len += sizeof(gle);
len += gle.gid_cnt * sizeof(gle.gid[0]);
}
}
clc_v2->hdr.length = htons(len);
}
memcpy(trl.eyecatcher, SMC_EYECATCHER, sizeof(SMC_EYECATCHER));
}
if (conn->lgr->is_smcd)
smcd_clc_prep_confirm_accept(conn, clc_v2, first_contact,
version, eid, ini, &fce_len,
&fce_v2x, &trl);
else
smcr_clc_prep_confirm_accept(conn, clc_v2, first_contact,
version, eid, ini, &fce_len,
&fce_v2x, &gle, &trl);
memset(&msg, 0, sizeof(msg));
i = 0;
vec[i].iov_base = clc_v2;