From ea7a7882e5386c8f942b397598cb634111b658d3 Mon Sep 17 00:00:00 2001 From: Jiri Benc Date: Mon, 24 Mar 2014 09:53:19 +0100 Subject: [PATCH] Move common code into port_prepare_and_send The task of preparing the message for transmission and sending it appears at many places. Unify them into a new function. Signed-off-by: Jiri Benc --- clock.c | 12 ++---- port.c | 129 ++++++++++++++++++-------------------------------------- port.h | 12 ++++++ 3 files changed, 57 insertions(+), 96 deletions(-) diff --git a/clock.c b/clock.c index 10fa4b6..c5dd873 100644 --- a/clock.c +++ b/clock.c @@ -174,7 +174,7 @@ static void clock_management_send_error(struct port *p, static int clock_management_get_response(struct clock *c, struct port *p, int id, struct ptp_message *req) { - int datalen = 0, err, pdulen, respond = 0; + int datalen = 0, respond = 0; struct management_tlv *tlv; struct management_tlv_datum *mtd; struct ptp_message *rsp; @@ -295,16 +295,10 @@ static int clock_management_get_response(struct clock *c, struct port *p, datalen++; } tlv->length = sizeof(tlv->id) + datalen; - pdulen = rsp->header.messageLength + sizeof(*tlv) + datalen; - rsp->header.messageLength = pdulen; + rsp->header.messageLength += sizeof(*tlv) + datalen; rsp->tlv_count = 1; - err = msg_pre_send(rsp); - if (err) { - goto out; - } - err = port_forward(p, rsp, pdulen); + port_prepare_and_send(p, rsp, 0); } -out: msg_put(rsp); return respond ? 1 : 0; } diff --git a/port.c b/port.c index 1505aca..568bd30 100644 --- a/port.c +++ b/port.c @@ -607,7 +607,7 @@ static int port_management_get_response(struct port *target, struct port *ingress, int id, struct ptp_message *req) { - int datalen = 0, err, pdulen, respond = 0; + int datalen = 0, respond = 0; struct management_tlv *tlv; struct management_tlv_datum *mtd; struct ptp_message *rsp; @@ -774,16 +774,10 @@ static int port_management_get_response(struct port *target, datalen++; } tlv->length = sizeof(tlv->id) + datalen; - pdulen = rsp->header.messageLength + sizeof(*tlv) + datalen; - rsp->header.messageLength = pdulen; + rsp->header.messageLength += sizeof(*tlv) + datalen; rsp->tlv_count = 1; - err = msg_pre_send(rsp); - if (err) { - goto out; - } - err = port_forward(ingress, rsp, pdulen); + port_prepare_and_send(ingress, rsp, 0); } -out: msg_put(rsp); return respond ? 1 : 0; } @@ -1049,7 +1043,7 @@ static void port_syfufsm(struct port *p, enum syfu_event event, static int port_pdelay_request(struct port *p) { struct ptp_message *msg; - int cnt, pdulen; + int err; /* If multiple pdelay resp were not detected the counter can be reset */ if (!p->multiple_pdr_detected) @@ -1060,12 +1054,11 @@ static int port_pdelay_request(struct port *p) if (!msg) return -1; - pdulen = sizeof(struct pdelay_req_msg); msg->hwts.type = p->timestamping; msg->header.tsmt = PDELAY_REQ | p->transportSpecific; msg->header.ver = PTP_VERSION; - msg->header.messageLength = pdulen; + msg->header.messageLength = sizeof(struct pdelay_req_msg); msg->header.domainNumber = clock_domain_number(p->clock); msg->header.correction = -p->pod.asymmetry; msg->header.sourcePortIdentity = p->portIdentity; @@ -1074,11 +1067,8 @@ static int port_pdelay_request(struct port *p) msg->header.logMessageInterval = port_is_ieee8021as(p) ? p->logMinPdelayReqInterval : 0x7f; - if (msg_pre_send(msg)) - goto out; - - cnt = transport_peer(p->trp, &p->fda, 1, msg, pdulen, &msg->hwts); - if (cnt <= 0) { + err = port_prepare_and_send(p, msg, 1); + if (err) { pr_err("port %hu: send peer delay request failed", portnum(p)); goto out; } @@ -1103,7 +1093,6 @@ out: static int port_delay_request(struct port *p) { struct ptp_message *msg; - int cnt, pdulen; /* Time to send a new request, forget current pdelay resp and fup */ if (p->peer_delay_resp) { @@ -1122,12 +1111,11 @@ static int port_delay_request(struct port *p) if (!msg) return -1; - pdulen = sizeof(struct delay_req_msg); msg->hwts.type = p->timestamping; msg->header.tsmt = DELAY_REQ | p->transportSpecific; msg->header.ver = PTP_VERSION; - msg->header.messageLength = pdulen; + msg->header.messageLength = sizeof(struct delay_req_msg); msg->header.domainNumber = clock_domain_number(p->clock); msg->header.correction = -p->pod.asymmetry; msg->header.sourcePortIdentity = p->portIdentity; @@ -1135,11 +1123,7 @@ static int port_delay_request(struct port *p) msg->header.control = CTL_DELAY_REQ; msg->header.logMessageInterval = 0x7f; - if (msg_pre_send(msg)) - goto out; - - cnt = transport_send(p->trp, &p->fda, 1, msg, pdulen, &msg->hwts); - if (cnt <= 0) { + if (port_prepare_and_send(p, msg, 1)) { pr_err("port %hu: send delay request failed", portnum(p)); goto out; } @@ -1163,7 +1147,7 @@ static int port_tx_announce(struct port *p) struct parent_ds *dad = clock_parent_ds(p->clock); struct timePropertiesDS *tp = clock_time_properties(p->clock); struct ptp_message *msg; - int cnt, err = 0, pdulen; + int err, pdulen; if (!port_capable(p)) { return 0; @@ -1197,16 +1181,9 @@ static int port_tx_announce(struct port *p) msg->announce.stepsRemoved = clock_steps_removed(p->clock); msg->announce.timeSource = tp->timeSource; - if (msg_pre_send(msg)) { - err = -1; - goto out; - } - cnt = transport_send(p->trp, &p->fda, 0, msg, pdulen, &msg->hwts); - if (cnt <= 0) { + err = port_prepare_and_send(p, msg, 0); + if (err) pr_err("port %hu: send announce failed", portnum(p)); - err = -1; - } -out: msg_put(msg); return err; } @@ -1214,7 +1191,7 @@ out: static int port_tx_sync(struct port *p) { struct ptp_message *msg, *fup; - int cnt, err = 0, pdulen; + int err, pdulen; int event = p->timestamping == TS_ONESTEP ? TRANS_ONESTEP : TRANS_EVENT; if (!port_capable(p)) { @@ -1247,14 +1224,9 @@ static int port_tx_sync(struct port *p) if (p->timestamping != TS_ONESTEP) msg->header.flagField[0] |= TWO_STEP; - if (msg_pre_send(msg)) { - err = -1; - goto out; - } - cnt = transport_send(p->trp, &p->fda, event, msg, pdulen, &msg->hwts); - if (cnt <= 0) { + err = port_prepare_and_send(p, msg, event); + if (err) { pr_err("port %hu: send sync failed", portnum(p)); - err = -1; goto out; } if (p->timestamping == TS_ONESTEP) { @@ -1285,15 +1257,9 @@ static int port_tx_sync(struct port *p) ts_to_timestamp(&msg->hwts.ts, &fup->follow_up.preciseOriginTimestamp); - if (msg_pre_send(fup)) { - err = -1; - goto out; - } - cnt = transport_send(p->trp, &p->fda, 0, fup, pdulen, &fup->hwts); - if (cnt <= 0) { + err = port_prepare_and_send(p, fup, 0); + if (err) pr_err("port %hu: send follow up failed", portnum(p)); - err = -1; - } out: msg_put(msg); msg_put(fup); @@ -1521,7 +1487,7 @@ static int process_announce(struct port *p, struct ptp_message *m) static int process_delay_req(struct port *p, struct ptp_message *m) { struct ptp_message *msg; - int cnt, err = 0, pdulen; + int err; if (p->state != PS_MASTER && p->state != PS_GRAND_MASTER) return 0; @@ -1535,12 +1501,11 @@ static int process_delay_req(struct port *p, struct ptp_message *m) if (!msg) return -1; - pdulen = sizeof(struct delay_resp_msg); msg->hwts.type = p->timestamping; msg->header.tsmt = DELAY_RESP | p->transportSpecific; msg->header.ver = PTP_VERSION; - msg->header.messageLength = pdulen; + msg->header.messageLength = sizeof(struct delay_resp_msg); msg->header.domainNumber = m->header.domainNumber; msg->header.correction = m->header.correction; msg->header.sourcePortIdentity = p->portIdentity; @@ -1552,16 +1517,9 @@ static int process_delay_req(struct port *p, struct ptp_message *m) msg->delay_resp.requestingPortIdentity = m->header.sourcePortIdentity; - if (msg_pre_send(msg)) { - err = -1; - goto out; - } - cnt = transport_send(p->trp, &p->fda, 0, msg, pdulen, NULL); - if (cnt <= 0) { + err = port_prepare_and_send(p, msg, 0); + if (err) pr_err("port %hu: send delay response failed", portnum(p)); - err = -1; - } -out: msg_put(msg); return err; } @@ -1639,7 +1597,7 @@ static void process_follow_up(struct port *p, struct ptp_message *m) static int process_pdelay_req(struct port *p, struct ptp_message *m) { struct ptp_message *rsp, *fup; - int cnt, err = -1, rsp_len, fup_len; + int err; if (p->delayMechanism == DM_E2E) { pr_warning("port %hu: pdelay_req on E2E port", portnum(p)); @@ -1675,12 +1633,11 @@ static int process_pdelay_req(struct port *p, struct ptp_message *m) return -1; } - rsp_len = sizeof(struct pdelay_resp_msg); rsp->hwts.type = p->timestamping; rsp->header.tsmt = PDELAY_RESP | p->transportSpecific; rsp->header.ver = PTP_VERSION; - rsp->header.messageLength = rsp_len; + rsp->header.messageLength = sizeof(struct pdelay_resp_msg); rsp->header.domainNumber = m->header.domainNumber; rsp->header.sourcePortIdentity = p->portIdentity; rsp->header.sequenceId = m->header.sequenceId; @@ -1699,12 +1656,11 @@ static int process_pdelay_req(struct port *p, struct ptp_message *m) ts_to_timestamp(&m->hwts.ts, &rsp->pdelay_resp.requestReceiptTimestamp); rsp->pdelay_resp.requestingPortIdentity = m->header.sourcePortIdentity; - fup_len = sizeof(struct pdelay_resp_fup_msg); fup->hwts.type = p->timestamping; fup->header.tsmt = PDELAY_RESP_FOLLOW_UP | p->transportSpecific; fup->header.ver = PTP_VERSION; - fup->header.messageLength = fup_len; + fup->header.messageLength = sizeof(struct pdelay_resp_fup_msg); fup->header.domainNumber = m->header.domainNumber; fup->header.correction = m->header.correction; fup->header.sourcePortIdentity = p->portIdentity; @@ -1714,11 +1670,8 @@ static int process_pdelay_req(struct port *p, struct ptp_message *m) fup->pdelay_resp_fup.requestingPortIdentity = m->header.sourcePortIdentity; - if (msg_pre_send(rsp)) - goto out; - - cnt = transport_peer(p->trp, &p->fda, 1, rsp, rsp_len, &rsp->hwts); - if (cnt <= 0) { + err = port_prepare_and_send(p, rsp, 1); + if (err) { pr_err("port %hu: send peer delay response failed", portnum(p)); goto out; } @@ -1730,15 +1683,10 @@ static int process_pdelay_req(struct port *p, struct ptp_message *m) ts_to_timestamp(&rsp->hwts.ts, &fup->pdelay_resp_fup.responseOriginTimestamp); - if (msg_pre_send(fup)) - goto out; - - cnt = transport_peer(p->trp, &p->fda, 0, fup, fup_len, &rsp->hwts); - if (cnt <= 0) { + err = port_prepare_and_send(p, fup, 0); + if (err) pr_err("port %hu: send pdelay_resp_fup failed", portnum(p)); - goto out; - } - err = 0; + out: msg_put(rsp); msg_put(fup); @@ -2222,6 +2170,18 @@ int port_forward(struct port *p, struct ptp_message *msg, int msglen) return cnt <= 0 ? -1 : 0; } +int port_prepare_and_send(struct port *p, struct ptp_message *msg, int event) +{ + UInteger16 msg_len; + int cnt; + + msg_len = msg->header.messageLength; + if (msg_pre_send(msg)) + return -1; + cnt = transport_send(p->trp, &p->fda, event, msg, msg_len, &msg->hwts); + return cnt <= 0 ? -1 : 0; +} + struct PortIdentity port_identity(struct port *p) { return p->portIdentity; @@ -2301,12 +2261,7 @@ int port_management_error(struct PortIdentity pid, struct port *ingress, msg->header.messageLength = pdulen; msg->tlv_count = 1; - err = msg_pre_send(msg); - if (err) { - goto out; - } - err = port_forward(ingress, msg, pdulen); -out: + err = port_prepare_and_send(ingress, msg, 0); msg_put(msg); return err; } diff --git a/port.h b/port.h index e781f24..9d1ddc9 100644 --- a/port.h +++ b/port.h @@ -92,6 +92,18 @@ enum fsm_event port_event(struct port *port, int fd_index); */ int port_forward(struct port *p, struct ptp_message *msg, int msglen); +/** + * Prepare message for transmission and send it to a given port. Note that + * a single message cannot be sent several times using this function, that + * would lead to corrupted data being sent. Use msg_pre_send and + * port_forward if you need to send single message to several ports. + * @param p A pointer previously obtained via port_open(). + * @param msg The message to send. + * @param event 0 if the message is a general message, 1 if it is an + * event message. + */ +int port_prepare_and_send(struct port *p, struct ptp_message *msg, int event); + /** * Obtain a port's identity. * @param p A pointer previously obtained via port_open().