diff options
Diffstat (limited to 'net/smc/smc_clc.c')
-rw-r--r-- | net/smc/smc_clc.c | 99 |
1 files changed, 69 insertions, 30 deletions
diff --git a/net/smc/smc_clc.c b/net/smc/smc_clc.c index fed101454217..6f51c050d84c 100644 --- a/net/smc/smc_clc.c +++ b/net/smc/smc_clc.c @@ -27,6 +27,7 @@ #define SMCR_CLC_ACCEPT_CONFIRM_LEN 68 #define SMCD_CLC_ACCEPT_CONFIRM_LEN 48 +#define SMCD_CLC_ACCEPT_CONFIRM_LEN_V2 78 #define SMC_CLC_RECV_BUF_LEN 100 /* eye catcher "SMCR" EBCDIC for CLC messages */ @@ -75,12 +76,34 @@ static bool smc_clc_msg_prop_valid(struct smc_clc_msg_proposal *pclc) return true; } +/* check arriving CLC accept or confirm */ +static bool +smc_clc_msg_acc_conf_valid(struct smc_clc_msg_accept_confirm_v2 *clc_v2) +{ + struct smc_clc_msg_hdr *hdr = &clc_v2->hdr; + + if (hdr->typev1 != SMC_TYPE_R && hdr->typev1 != SMC_TYPE_D) + return false; + if (hdr->version == SMC_V1) { + if ((hdr->typev1 == SMC_TYPE_R && + ntohs(hdr->length) != SMCR_CLC_ACCEPT_CONFIRM_LEN) || + (hdr->typev1 == SMC_TYPE_D && + ntohs(hdr->length) != SMCD_CLC_ACCEPT_CONFIRM_LEN)) + return false; + } else { + if (hdr->typev1 == SMC_TYPE_D && + ntohs(hdr->length) != SMCD_CLC_ACCEPT_CONFIRM_LEN_V2) + return false; + } + return true; +} + /* check if received message has a correct header length and contains valid * heading and trailing eyecatchers */ static bool smc_clc_msg_hdr_valid(struct smc_clc_msg_hdr *clcm, bool check_trl) { - struct smc_clc_msg_accept_confirm *clc; + struct smc_clc_msg_accept_confirm_v2 *clc_v2; struct smc_clc_msg_proposal *pclc; struct smc_clc_msg_decline *dclc; struct smc_clc_msg_trail *trl; @@ -98,16 +121,12 @@ static bool smc_clc_msg_hdr_valid(struct smc_clc_msg_hdr *clcm, bool check_trl) break; case SMC_CLC_ACCEPT: case SMC_CLC_CONFIRM: - if (clcm->typev1 != SMC_TYPE_R && clcm->typev1 != SMC_TYPE_D) - return false; - clc = (struct smc_clc_msg_accept_confirm *)clcm; - if ((clcm->typev1 == SMC_TYPE_R && - ntohs(clc->hdr.length) != SMCR_CLC_ACCEPT_CONFIRM_LEN) || - (clcm->typev1 == SMC_TYPE_D && - ntohs(clc->hdr.length) != SMCD_CLC_ACCEPT_CONFIRM_LEN)) + clc_v2 = (struct smc_clc_msg_accept_confirm_v2 *)clcm; + if (!smc_clc_msg_acc_conf_valid(clc_v2)) return false; trl = (struct smc_clc_msg_trail *) - ((u8 *)clc + ntohs(clc->hdr.length) - sizeof(*trl)); + ((u8 *)clc_v2 + ntohs(clc_v2->hdr.length) - + sizeof(*trl)); break; case SMC_CLC_DECLINE: dclc = (struct smc_clc_msg_decline *)clcm; @@ -599,17 +618,19 @@ int smc_clc_send_proposal(struct smc_sock *smc, struct smc_init_info *ini) /* build and send CLC CONFIRM / ACCEPT message */ static int smc_clc_send_confirm_accept(struct smc_sock *smc, - struct smc_clc_msg_accept_confirm *clc, - int first_contact) + struct smc_clc_msg_accept_confirm_v2 *clc_v2, + int first_contact, u8 version) { struct smc_connection *conn = &smc->conn; + struct smc_clc_msg_accept_confirm *clc; struct smc_clc_msg_trail trl; struct kvec vec[2]; struct msghdr msg; int i; /* send SMC Confirm CLC msg */ - clc->hdr.version = SMC_V1; /* SMC version */ + clc = (struct smc_clc_msg_accept_confirm *)clc_v2; + clc->hdr.version = version; /* SMC version */ if (first_contact) clc->hdr.typev2 |= SMC_FIRST_CONTACT_MASK; if (conn->lgr->is_smcd) { @@ -617,12 +638,23 @@ static int smc_clc_send_confirm_accept(struct smc_sock *smc, memcpy(clc->hdr.eyecatcher, SMCD_EYECATCHER, sizeof(SMCD_EYECATCHER)); clc->hdr.typev1 = SMC_TYPE_D; - clc->hdr.length = htons(SMCD_CLC_ACCEPT_CONFIRM_LEN); clc->d0.gid = conn->lgr->smcd->local_gid; clc->d0.token = conn->rmb_desc->token; clc->d0.dmbe_size = conn->rmbe_size_short; 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 { + u8 *eid = NULL; + + clc_v2->chid = htons(smc_ism_get_chid(conn->lgr->smcd)); + smc_ism_get_system_eid(conn->lgr->smcd, &eid); + if (eid) + memcpy(clc_v2->eid, eid, SMC_MAX_EID_LEN); + clc_v2->hdr.length = + htons(SMCD_CLC_ACCEPT_CONFIRM_LEN_V2); + } memcpy(trl.eyecatcher, SMCD_EYECATCHER, sizeof(SMCD_EYECATCHER)); } else { @@ -661,11 +693,14 @@ static int smc_clc_send_confirm_accept(struct smc_sock *smc, memset(&msg, 0, sizeof(msg)); 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 = clc_v2; + if (version > SMC_V1) + vec[i++].iov_len = SMCD_CLC_ACCEPT_CONFIRM_LEN_V2 - sizeof(trl); + else + 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, @@ -673,17 +708,19 @@ static int smc_clc_send_confirm_accept(struct smc_sock *smc, } /* send CLC CONFIRM message across internal TCP socket */ -int smc_clc_send_confirm(struct smc_sock *smc) +int smc_clc_send_confirm(struct smc_sock *smc, bool clnt_first_contact, + u8 version) { - struct smc_clc_msg_accept_confirm cclc; + struct smc_clc_msg_accept_confirm_v2 cclc_v2; int reason_code = 0; int len; /* send SMC Confirm CLC msg */ - memset(&cclc, 0, sizeof(cclc)); - cclc.hdr.type = SMC_CLC_CONFIRM; - len = smc_clc_send_confirm_accept(smc, &cclc, 0); - if (len < ntohs(cclc.hdr.length)) { + memset(&cclc_v2, 0, sizeof(cclc_v2)); + cclc_v2.hdr.type = SMC_CLC_CONFIRM; + len = smc_clc_send_confirm_accept(smc, &cclc_v2, clnt_first_contact, + version); + if (len < ntohs(cclc_v2.hdr.length)) { if (len >= 0) { reason_code = -ENETUNREACH; smc->sk.sk_err = -reason_code; @@ -696,15 +733,17 @@ 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, bool srv_first_contact) +int smc_clc_send_accept(struct smc_sock *new_smc, bool srv_first_contact, + u8 version) { - struct smc_clc_msg_accept_confirm aclc; + struct smc_clc_msg_accept_confirm_v2 aclc_v2; int len; - memset(&aclc, 0, sizeof(aclc)); - aclc.hdr.type = SMC_CLC_ACCEPT; - len = smc_clc_send_confirm_accept(new_smc, &aclc, srv_first_contact); - if (len < ntohs(aclc.hdr.length)) + memset(&aclc_v2, 0, sizeof(aclc_v2)); + aclc_v2.hdr.type = SMC_CLC_ACCEPT; + len = smc_clc_send_confirm_accept(new_smc, &aclc_v2, srv_first_contact, + version); + if (len < ntohs(aclc_v2.hdr.length)) len = len >= 0 ? -EPROTO : -new_smc->clcsock->sk->sk_err; return len > 0 ? 0 : len; |