From: Guangguan Wang <guangguan.wang@linux.alibaba.com> mainline inclusion from mainline-v6.6-rc1 commit 7290178a82fcc71694816ffe3c0c56453f0cf59c category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/IC914B Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i... -------------------------------- Add vendor unique experimental options area in clc handshake. In clc accept and confirm msg, vendor unique experimental options use the 16-Bytes reserved field, which defined in struct smc_clc_fce_gid_ext in previous version. Because of the struct smc_clc_first_contact_ext is widely used and limit the scope of modification, this patch moves the 16-Bytes reserved field out of struct smc_clc_fce_gid_ext, and followed with the struct smc_clc_first_contact_ext in a new struct names struct smc_clc_first_contact_ext_v2x. For SMC-R first connection, in previous version, the struct smc_clc_ first_contact_ext and the 16-Bytes reserved field has already been included in clc accept and confirm msg. Thus, this patch use struct smc_clc_first_contact_ext_v2x instead of the struct smc_clc_first_ contact_ext and the 16-Bytes reserved field in SMC-R clc accept and confirm msg is compatible with previous version. For SMC-D first connection, in previous version, only the struct smc_ clc_first_contact_ext is included in clc accept and confirm msg, and the 16-Bytes reserved field is not included. Thus, when the negotiated smc release version is the version before v2.1, we still use struct smc_clc_first_contact_ext for compatible consideration. If the negotiated smc release version is v2.1 or later, use struct smc_clc_first_contact_ ext_v2x instead. Signed-off-by: Guangguan Wang <guangguan.wang@linux.alibaba.com> Reviewed-by: Tony Lu <tonylu@linux.alibaba.com> Reviewed-by: Jan Karcher <jaka@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Wang Liang <wangliang74@huawei.com> --- net/smc/af_smc.c | 2 +- net/smc/smc_clc.c | 44 +++++++++++++++++++++++--------------------- net/smc/smc_clc.h | 15 +++++++++++++-- 3 files changed, 37 insertions(+), 24 deletions(-) diff --git a/net/smc/af_smc.c b/net/smc/af_smc.c index c659d1e2b1db..4423978ba0f5 100644 --- a/net/smc/af_smc.c +++ b/net/smc/af_smc.c @@ -1090,7 +1090,7 @@ static int smc_connect_ism_vlan_cleanup(struct smc_sock *smc, #define SMC_CLC_MAX_ACCEPT_LEN \ (sizeof(struct smc_clc_msg_accept_confirm_v2) + \ - sizeof(struct smc_clc_first_contact_ext) + \ + sizeof(struct smc_clc_first_contact_ext_v2x) + \ sizeof(struct smc_clc_msg_trail)) /* CLC handshake during connect */ diff --git a/net/smc/smc_clc.c b/net/smc/smc_clc.c index b149fc0df836..f2961844f70c 100644 --- a/net/smc/smc_clc.c +++ b/net/smc/smc_clc.c @@ -395,9 +395,7 @@ smc_clc_msg_acc_conf_valid(struct smc_clc_msg_accept_confirm_v2 *clc_v2) return false; } else { if (hdr->typev1 == SMC_TYPE_D && - ntohs(hdr->length) != SMCD_CLC_ACCEPT_CONFIRM_LEN_V2 && - (ntohs(hdr->length) != SMCD_CLC_ACCEPT_CONFIRM_LEN_V2 + - sizeof(struct smc_clc_first_contact_ext))) + ntohs(hdr->length) < SMCD_CLC_ACCEPT_CONFIRM_LEN_V2) return false; if (hdr->typev1 == SMC_TYPE_R && ntohs(hdr->length) < SMCR_CLC_ACCEPT_CONFIRM_LEN_V2) @@ -424,13 +422,19 @@ smc_clc_msg_decl_valid(struct smc_clc_msg_decline *dclc) return true; } -static void smc_clc_fill_fce(struct smc_clc_first_contact_ext *fce, int *len, int release_nr) +static int smc_clc_fill_fce(struct smc_clc_first_contact_ext_v2x *fce, + struct smc_init_info *ini) { + int ret = sizeof(*fce); + memset(fce, 0, sizeof(*fce)); - fce->os_type = SMC_CLC_OS_LINUX; - fce->release = release_nr; - memcpy(fce->hostname, smc_hostname, sizeof(smc_hostname)); - (*len) += sizeof(*fce); + fce->fce_v2_base.os_type = SMC_CLC_OS_LINUX; + fce->fce_v2_base.release = ini->release_nr; + memcpy(fce->fce_v2_base.hostname, smc_hostname, sizeof(smc_hostname)); + if (ini->is_smcd && ini->release_nr < SMC_RELEASE_1) + ret = sizeof(struct smc_clc_first_contact_ext); + + return ret; } /* check if received message has a correct header length and contains valid @@ -990,13 +994,13 @@ static int smc_clc_send_confirm_accept(struct smc_sock *smc, u8 *eid, struct smc_init_info *ini) { struct smc_connection *conn = &smc->conn; + struct smc_clc_first_contact_ext_v2x fce; struct smc_clc_msg_accept_confirm *clc; - struct smc_clc_first_contact_ext fce; struct smc_clc_fce_gid_ext gle; struct smc_clc_msg_trail trl; + int i, len, fce_len; struct kvec vec[5]; struct msghdr msg; - int i, len; /* send SMC Confirm CLC msg */ clc = (struct smc_clc_msg_accept_confirm *)clc_v2; @@ -1022,8 +1026,10 @@ static int smc_clc_send_confirm_accept(struct smc_sock *smc, if (eid && eid[0]) memcpy(clc_v2->d1.eid, eid, SMC_MAX_EID_LEN); len = SMCD_CLC_ACCEPT_CONFIRM_LEN_V2; - if (first_contact) - smc_clc_fill_fce(&fce, &len, ini->release_nr); + if (first_contact) { + fce_len = smc_clc_fill_fce(&fce, ini); + len += fce_len; + } clc_v2->hdr.length = htons(len); } memcpy(trl.eyecatcher, SMCD_EYECATCHER, @@ -1067,15 +1073,14 @@ static int smc_clc_send_confirm_accept(struct smc_sock *smc, memcpy(clc_v2->r1.eid, eid, SMC_MAX_EID_LEN); len = SMCR_CLC_ACCEPT_CONFIRM_LEN_V2; if (first_contact) { - smc_clc_fill_fce(&fce, &len, ini->release_nr); - fce.v2_direct = !link->lgr->uses_gateway; - memset(&gle, 0, sizeof(gle)); + fce_len = smc_clc_fill_fce(&fce, ini); + len += fce_len; + fce.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]); - } else { - len += sizeof(gle.reserved); } } clc_v2->hdr.length = htons(len); @@ -1098,7 +1103,7 @@ static int smc_clc_send_confirm_accept(struct smc_sock *smc, sizeof(trl); if (version > SMC_V1 && first_contact) { vec[i].iov_base = &fce; - vec[i++].iov_len = sizeof(fce); + vec[i++].iov_len = fce_len; if (!conn->lgr->is_smcd) { if (clc->hdr.type == SMC_CLC_CONFIRM) { vec[i].iov_base = &gle; @@ -1106,9 +1111,6 @@ static int smc_clc_send_confirm_accept(struct smc_sock *smc, vec[i].iov_base = &ini->smcrv2.gidlist.list; vec[i++].iov_len = gle.gid_cnt * sizeof(gle.gid[0]); - } else { - vec[i].iov_base = &gle.reserved; - vec[i++].iov_len = sizeof(gle.reserved); } } } diff --git a/net/smc/smc_clc.h b/net/smc/smc_clc.h index 52ad36e8385a..bd6871995979 100644 --- a/net/smc/smc_clc.h +++ b/net/smc/smc_clc.h @@ -147,7 +147,9 @@ struct smc_clc_msg_proposal_prefix { /* prefix part of clc proposal message*/ struct smc_clc_msg_smcd { /* SMC-D GID information */ struct smc_clc_smcd_gid_chid ism; /* ISM native GID+CHID of requestor */ __be16 v2_ext_offset; /* SMC Version 2 Extension Offset */ - u8 reserved[28]; + u8 vendor_oui[3]; /* vendor organizationally unique identifier */ + u8 vendor_exp_options[5]; + u8 reserved[20]; }; struct smc_clc_smcd_v2_extension { @@ -231,8 +233,17 @@ struct smc_clc_first_contact_ext { u8 hostname[SMC_MAX_HOSTNAME_LEN]; }; +struct smc_clc_first_contact_ext_v2x { + struct smc_clc_first_contact_ext fce_v2_base; + u8 reserved3[4]; + __be32 vendor_exp_options; + u8 reserved4[8]; +} __packed; /* format defined in + * IBM Shared Memory Communications Version 2 (Third Edition) + * (https://www.ibm.com/support/pages/node/7009315) + */ + struct smc_clc_fce_gid_ext { - u8 reserved[16]; u8 gid_cnt; u8 reserved2[3]; u8 gid[][SMC_GID_SIZE]; -- 2.34.1