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Message-ID:
<SJ0PR11MB5896F3A110341D89A8D57AFFC3D62@SJ0PR11MB5896.namprd11.prod.outlook.com>
Date: Wed, 26 Jun 2024 09:46:45 +0000
From: "Karan Tilak Kumar (kartilak)" <kartilak@...co.com>
To: Hannes Reinecke <hare@...e.de>,
"Sesidhar Baddela (sebaddel)"
<sebaddel@...co.com>
CC: "Arulprabhu Ponnusamy (arulponn)" <arulponn@...co.com>,
"Dhanraj Jhawar
(djhawar)" <djhawar@...co.com>,
"Gian Carlo Boffa (gcboffa)"
<gcboffa@...co.com>,
"Masa Kai (mkai2)" <mkai2@...co.com>,
"Satish Kharat
(satishkh)" <satishkh@...co.com>,
"jejb@...ux.ibm.com" <jejb@...ux.ibm.com>,
"martin.petersen@...cle.com" <martin.petersen@...cle.com>,
"linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH 05/14] scsi: fnic: Add support for unsolicited requests
and responses
On Tuesday, June 11, 2024 11:32 PM, Hannes Reinecke <hare@...e.de> wrote:
>
> On 6/10/24 23:50, Karan Tilak Kumar wrote:
> > Add support for unsolicited requests and responses.
> > Add support to accept and reject frames.
> >
> > Reviewed-by: Sesidhar Baddela <sebaddel@...co.com>
> > Reviewed-by: Arulprabhu Ponnusamy <arulponn@...co.com>
> > Reviewed-by: Gian Carlo Boffa <gcboffa@...co.com>
> > Signed-off-by: Karan Tilak Kumar <kartilak@...co.com>
> > ---
> > drivers/scsi/fnic/fdls_disc.c | 566 +++++++++++++++++++++++++++++++++-
> > 1 file changed, 563 insertions(+), 3 deletions(-)
> >
> > diff --git a/drivers/scsi/fnic/fdls_disc.c
> > b/drivers/scsi/fnic/fdls_disc.c index d920202d413d..ad115de86f15
> > 100644
> > --- a/drivers/scsi/fnic/fdls_disc.c
> > +++ b/drivers/scsi/fnic/fdls_disc.c
> > @@ -125,6 +125,21 @@ struct fc_scr_s fnic_scr_req = {
> > .reg_func = 0x03
> > };
> >
> > +/*
> > + * Variables:
> > + * did, ox_id, rx_id
> > + */
> > +struct fc_els_acc_s fnic_els_acc = {
> > + .fchdr = {.r_ctl = 0x23, .did = {0xFF, 0xFF, 0xFD}, .type = 0x01,
> > + .f_ctl = FNIC_ELS_REP_FCTL},
> > + .command = FC_LS_ACC,
> > +};
> > +
> > +struct fc_els_reject_s fnic_els_rjt = {
> > + .fchdr = {.r_ctl = 0x23, .type = 0x01, .f_ctl = FNIC_ELS_REP_FCTL},
> > + .command = FC_LS_REJ,
> > +};
> > +
> > /*
> > * Variables:
> > * did, ox_id, rx_id, fcid, wwpn
> > @@ -135,6 +150,13 @@ struct fc_logo_req_s fnic_logo_req = {
> > .command = FC_ELS_LOGO,
> > };
> >
> > +static struct fc_abts_ba_acc_s fnic_ba_acc = {
> > + .fchdr = {.r_ctl = 0x84,
> > + .f_ctl = FNIC_FCP_RSP_FCTL},
> > + .low_seq_cnt = 0,
> > + .high_seq_cnt = 0xFFFF,
> > +};
> > +
> > #define RETRIES_EXHAUSTED(iport) \
> > (iport->fabric.retry_counter == FABRIC_LOGO_MAX_RETRY)
> >
> > @@ -150,7 +172,6 @@ static struct fnic_tport_s *fdls_create_tport(struct fnic_iport_s *iport,
> > static void fdls_target_restart_nexus(struct fnic_tport_s *tport);
> > static void fdls_start_tport_timer(struct fnic_iport_s *iport,
> > struct fnic_tport_s *tport, int timeout);
> > -
> > static void fdls_start_fabric_timer(struct fnic_iport_s *iport,
> > int timeout);
> > static void fdls_tport_timer_callback(struct timer_list *t); @@
> > -231,6 +252,48 @@ fdls_start_tport_timer(struct fnic_iport_s *iport,
> > tport->timer_pending = 1;
> > }
> >
> > +static void
> > +fdls_send_rscn_resp(struct fnic_iport_s *iport,
> > + struct fc_hdr_s *rscn_fchdr)
> > +{
> > + struct fc_els_acc_s els_acc;
> > + uint16_t oxid;
> > + uint8_t fcid[3];
> > +
> > + memcpy(&els_acc, &fnic_els_acc, sizeof(struct fc_els_acc_s));
> > +
> > + hton24(fcid, iport->fcid);
> > + FNIC_SET_S_ID((&els_acc.fchdr), fcid);
> > + FNIC_SET_D_ID((&els_acc.fchdr), rscn_fchdr->sid);
> > +
> > + oxid = FNIC_GET_OX_ID(rscn_fchdr);
> > + FNIC_SET_OX_ID((&els_acc.fchdr), oxid);
> > +
> > + FNIC_SET_RX_ID((&els_acc.fchdr), FNIC_RSCN_RESP_OXID);
> > +
> > + fnic_send_fcoe_frame(iport, &els_acc, sizeof(struct fc_els_acc_s));
> > +}
> > +
> > +static void
> > +fdls_send_logo_resp(struct fnic_iport_s *iport, struct fc_hdr_s
> > +*req_fchdr) {
> > + struct fc_els_acc_s logo_resp;
> > + uint16_t oxid;
> > + uint8_t fcid[3];
> > +
> > + memcpy(&logo_resp, &fnic_els_acc, sizeof(struct fc_els_acc_s));
> > +
> > + hton24(fcid, iport->fcid);
> > + FNIC_SET_S_ID((&logo_resp.fchdr), fcid);
> > + FNIC_SET_D_ID((&logo_resp.fchdr), req_fchdr->sid);
> > +
> > + oxid = FNIC_GET_OX_ID(req_fchdr);
> > + FNIC_SET_OX_ID((&logo_resp.fchdr), oxid);
> > +
> > + FNIC_SET_RX_ID((&logo_resp.fchdr), FNIC_LOGO_RESP_OXID);
> > + fnic_send_fcoe_frame(iport, &logo_resp, sizeof(struct
> > +fc_els_acc_s)); }
> > +
> > void
> > fdls_send_tport_abts(struct fnic_iport_s *iport,
> > struct fnic_tport_s *tport)
> > @@ -2541,6 +2604,188 @@ fdls_process_fabric_abts_rsp(struct fnic_iport_s *iport,
> > }
> > }
> >
> > +static void
> > +fdls_process_abts_req(struct fnic_iport_s *iport, struct fc_hdr_s
> > +*fchdr) {
> > + struct fc_abts_ba_acc_s ba_acc;
> > + uint32_t nport_id;
> > + uint16_t oxid;
> > + struct fnic_tport_s *tport;
> > + struct fnic *fnic = iport->fnic;
> > +
> > + nport_id = ntoh24(fchdr->sid);
> > + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > + "Received abort from SID %8x", nport_id);
> > +
> > + tport = fnic_find_tport_by_fcid(iport, nport_id);
> > + if (tport) {
> > + oxid = FNIC_GET_OX_ID(fchdr);
> > + if (tport->oxid_used == oxid) {
> > + tport->flags |= FNIC_FDLS_TGT_ABORT_ISSUED;
> > + fdls_free_tgt_oxid(iport, ntohs(oxid));
> > + }
>
> Hmm. This is an abort, right?
> Don't you need to look up the command referred to by 'oxid'?
> Just freeing the oxid doesn't abort the command itself...
Thanks for your comments, Hannes.
This abort sequence is sent by some targets to the fnic initiator.
The target aborts the command sends this to the fnic.
Therefore, there’s no reason to send an abort from the initiator.
For the command itself that was aborted by the target,
fdls_tport_timer_callback is called when the timer lapses,
and it will be retried from there.
> > + }
> > +
> > + memcpy(&ba_acc, &fnic_ba_acc, sizeof(struct fc_abts_ba_acc_s));
> > + FNIC_SET_S_ID((&ba_acc.fchdr), fchdr->did);
> > + FNIC_SET_D_ID((&ba_acc.fchdr), fchdr->sid);
> > +
> > + ba_acc.fchdr.rx_id = fchdr->rx_id;
> > + ba_acc.rx_id = ba_acc.fchdr.rx_id;
> > + ba_acc.fchdr.ox_id = fchdr->ox_id;
> > + ba_acc.ox_id = ba_acc.fchdr.ox_id;
> > +
> > + fnic_send_fcoe_frame(iport, &ba_acc, sizeof(struct
> > +fc_abts_ba_acc_s)); }
> > +
> > +static void
> > +fdls_process_unsupported_els_req(struct fnic_iport_s *iport,
> > + struct fc_hdr_s *fchdr)
> > +{
> > + struct fc_els_reject_s ls_rsp;
> > + uint16_t oxid;
> > + uint32_t d_id = ntoh24(fchdr->did);
> > + struct fnic *fnic = iport->fnic;
> > +
> > + memcpy(&ls_rsp, &fnic_els_rjt, sizeof(struct fc_els_reject_s));
> > +
> > + if (iport->fcid != d_id) {
> > + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > + "Dropping unsupported ELS with illegal frame bits 0x%x\n",
> > + d_id);
> > + return;
> > + }
> > +
> > + if ((iport->state != FNIC_IPORT_STATE_READY)
> > + && (iport->state != FNIC_IPORT_STATE_FABRIC_DISC)) {
> > + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > + "Dropping unsupported ELS request in iport state: %d",
> > + iport->state);
> > + return;
> > + }
> > +
> > + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > + "Process unsupported ELS request from SID: 0x%x",
> > + ntoh24(fchdr->sid));
> > + /* We don't support this ELS request, send a reject */
> > + ls_rsp.reason_code = 0x0B;
> > + ls_rsp.reason_expl = 0x0;
> > + ls_rsp.vendor_specific = 0x0;
> > +
> > + FNIC_SET_S_ID((&ls_rsp.fchdr), fchdr->did);
> > + FNIC_SET_D_ID((&ls_rsp.fchdr), fchdr->sid);
> > + oxid = FNIC_GET_OX_ID(fchdr);
> > + FNIC_SET_OX_ID((&ls_rsp.fchdr), oxid);
> > +
> > + FNIC_SET_RX_ID((&ls_rsp.fchdr), FNIC_UNSUPPORTED_RESP_OXID);
> > + fnic_send_fcoe_frame(iport, &ls_rsp, sizeof(struct
> > +fc_els_reject_s)); }
> > +
> > +static void
> > +fdls_process_rls_req(struct fnic_iport_s *iport, struct fc_hdr_s
> > +*fchdr) {
> > + struct fc_els_rls_ls_acc_s rls_acc_rsp;
> > + uint16_t oxid;
> > + struct fnic *fnic = iport->fnic;
> > +
> > + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > + "Process RLS request %d", iport->fnic->fnic_num);
> > +
> > + if ((iport->state != FNIC_IPORT_STATE_READY)
> > + && (iport->state != FNIC_IPORT_STATE_FABRIC_DISC)) {
> > + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > + "Received RLS req in iport state: %d. Dropping the frame.",
> > + iport->state);
> > + return;
> > + }
> > +
> > + memset(&rls_acc_rsp, 0, sizeof(struct fc_els_rls_ls_acc_s));
> > +
> > + FNIC_SET_S_ID((&rls_acc_rsp.fchdr), fchdr->did);
> > + FNIC_SET_D_ID((&rls_acc_rsp.fchdr), fchdr->sid);
> > + oxid = FNIC_GET_OX_ID(fchdr);
> > + FNIC_SET_OX_ID((&rls_acc_rsp.fchdr), oxid);
> > + FNIC_SET_RX_ID((&rls_acc_rsp.fchdr), 0xffff);
> > + rls_acc_rsp.fchdr.f_ctl = FNIC_ELS_REP_FCTL;
> > + rls_acc_rsp.fchdr.r_ctl = 0x23;
> > + rls_acc_rsp.fchdr.type = 0x01;
> > + rls_acc_rsp.command = FC_LS_ACC;
> > + rls_acc_rsp.link_fail_count = htonl(iport->fnic->link_down_cnt);
> > +
> > + fnic_send_fcoe_frame(iport, &rls_acc_rsp,
> > + sizeof(struct fc_els_rls_ls_acc_s));
>
> Indentation.
Sure. I'll fix this in the next version.
> > +}
> > +
> > +static void
> > +fdls_process_els_req(struct fnic_iport_s *iport, struct fc_hdr_s *fchdr,
> > + uint32_t len)
> > +{
> > + struct fc_els_acc_s *els_acc;
> > + uint16_t oxid;
> > + uint8_t fcid[3];
> > + uint8_t *fc_payload;
> > + uint8_t *dst_frame;
> > + uint8_t type;
> > + struct fnic *fnic = iport->fnic;
> > +
> > + fc_payload = (uint8_t *) fchdr + sizeof(struct fc_hdr_s);
> > + type = *fc_payload;
> > +
> > + if ((iport->state != FNIC_IPORT_STATE_READY)
> > + && (iport->state != FNIC_IPORT_STATE_FABRIC_DISC)) {
> > + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > + "Dropping ELS frame type :%x in iport state: %d",
> > + type, iport->state);
> > + return;
> > + }
> > + switch (type) {
> > + case FC_ELS_ECHO_REQ:
> > + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > + "sending LS_ACC for ECHO request %d\n",
> > + iport->fnic->fnic_num);
> > + break;
> > +
> > + case FC_ELS_RRQ_REQ:
> > + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > + "sending LS_ACC for RRQ request %d\n",
> > + iport->fnic->fnic_num);
> > + break;
> > +
> > + default:
> > + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > + "sending LS_ACC for %x ELS frame\n", type);
> > + break;
> > + }
> > + dst_frame = kzalloc(len, GFP_ATOMIC);
> > + if (!dst_frame) {
> > + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > + "Failed to allocate ELS response for %x", type);
> > + return;
> > + }
> > + if (type == FC_ELS_ECHO_REQ) {
> > + /* Brocade sends a longer payload, copy all frame back */
> > + memcpy(dst_frame, fchdr, len);
> > + }
> > +
> > + els_acc = (struct fc_els_acc_s *) dst_frame;
> > + memcpy(els_acc, &fnic_els_acc, sizeof(struct fc_els_acc_s));
> > +
> > + hton24(fcid, iport->fcid);
> > + FNIC_SET_S_ID((&els_acc->fchdr), fcid);
> > + FNIC_SET_D_ID((&els_acc->fchdr), fchdr->sid);
> > +
> > + oxid = FNIC_GET_OX_ID(fchdr);
> > + FNIC_SET_OX_ID((&els_acc->fchdr), oxid);
> > + FNIC_SET_RX_ID((&els_acc->fchdr), 0xffff);
> > +
> > + if (type == FC_ELS_ECHO_REQ)
> > + fnic_send_fcoe_frame(iport, els_acc, len);
> > + else
> > + fnic_send_fcoe_frame(iport, els_acc, sizeof(struct fc_els_acc_s));
> > +
> > + kfree(dst_frame);
> > +}
> > +
> > static void
> > fdls_process_tgt_abts_rsp(struct fnic_iport_s *iport,
> > struct fc_hdr_s *fchdr)
> > @@ -2584,8 +2829,8 @@ fdls_process_tgt_abts_rsp(struct fnic_iport_s *iport,
> > if ((oxid >= FDLS_ADISC_OXID_BASE) && (oxid < FDLS_TGT_OXID_POOL_END)) {
> > if (fchdr->r_ctl == FNIC_BA_ACC_RCTL) {
> > FNIC_FCS_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,
> > - "Received tgt ADISC abts response BA_ACC for OX_ID: 0x%x tgt_fcid: 0x%x",
> > - ba_acc->ox_id, tport->fcid);
> > + "OX_ID: 0x%x tgt_fcid: 0x%x rcvd tgt adisc abts resp BA_ACC",
> > + ba_acc->ox_id, tport->fcid);
> > } else if (fchdr->r_ctl == FNIC_BA_RJT_RCTL) {
> > FNIC_FCS_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,
> > "ADISC BA_RJT rcvd tport_fcid: 0x%x tport_state: %d ", @@
> > -2676,6 +2921,296 @@ fdls_process_tgt_abts_rsp(struct fnic_iport_s *iport,
> > "Received ABTS response for unknown frame %p", iport);
> > }
> >
> > +static void
> > +fdls_process_plogi_req(struct fnic_iport_s *iport, struct fc_hdr_s
> > +*fchdr) {
> > + struct fc_els_reject_s plogi_rsp;
> > + uint16_t oxid;
> > + uint32_t d_id = ntoh24(fchdr->did);
> > + struct fnic *fnic = iport->fnic;
> > +
> > + memcpy(&plogi_rsp, &fnic_els_rjt, sizeof(struct fc_els_reject_s));
> > +
> > + if (iport->fcid != d_id) {
> > + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > + "Received PLOGI with illegal frame bits. Dropping frame %p",
> > + iport);
> > + return;
> > + }
> > +
> > + if (iport->state != FNIC_IPORT_STATE_READY) {
> > + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > + "Received PLOGI request in iport state: %d Dropping frame",
> > + iport->state);
> > + return;
> > + }
> > + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > + "Process PLOGI request from SID: 0x%x",
> > + ntoh24(fchdr->sid));
> > +
> > + /* We don't support PLOGI request, send a reject */
> > + plogi_rsp.reason_code = 0x0B;
> > + plogi_rsp.reason_expl = 0x0;
> > + plogi_rsp.vendor_specific = 0x0;
> > +
> > + FNIC_SET_S_ID((&plogi_rsp.fchdr), fchdr->did);
> > + FNIC_SET_D_ID((&plogi_rsp.fchdr), fchdr->sid);
> > +
> > + oxid = FNIC_GET_OX_ID(fchdr);
> > + FNIC_SET_OX_ID((&plogi_rsp.fchdr), oxid);
> > +
> > + FNIC_SET_RX_ID((&plogi_rsp.fchdr), FNIC_PLOGI_RESP_OXID);
> > + fnic_send_fcoe_frame(iport, &plogi_rsp,
> > + sizeof(struct fc_els_reject_s));
>
> Indentaion again.
Sure. I'll fix this in the next version.
> > +}
> > +
> > +static void
> > +fdls_process_logo_req(struct fnic_iport_s *iport, struct fc_hdr_s
> > +*fchdr) {
> > + struct fc_logo_req_s *logo = (struct fc_logo_req_s *) fchdr;
> > + uint32_t nport_id;
> > + uint64_t nport_name;
> > + struct fnic_tport_s *tport;
> > + struct fnic *fnic = iport->fnic;
> > + uint16_t oxid;
> > +
> > + nport_id = ntoh24(logo->fcid);
> > + nport_name = logo->wwpn;
> > +
> > + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > + "Process LOGO request from fcid: 0x%x", nport_id);
> > +
> > + if (iport->state != FNIC_IPORT_STATE_READY) {
> > + FNIC_FCS_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,
> > + "Dropping LOGO req from 0x%x in iport state: %d",
> > + nport_id, iport->state);
> > + return;
> > + }
> > +
> > + tport = fnic_find_tport_by_fcid(iport, nport_id);
> > +
> > + if (!tport) {
> > + /* We are not logged in with the nport, log and drop... */
> > + FNIC_FCS_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,
> > + "Received LOGO from an nport not logged in: 0x%x",
> > + nport_id);
> > + return;
> > + }
> > + if (tport->fcid != nport_id) {
> > + FNIC_FCS_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,
> > + "Received LOGO with invalid target port fcid: 0x%x",
> > + nport_id);
> > + return;
> > + }
> > + if (tport->timer_pending) {
> > + FNIC_FCS_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,
> > + "tport fcid 0x%x: Canceling disc timer\n",
> > + tport->fcid);
> > + fnic_del_tport_timer_sync();
> > + tport->timer_pending = 0;
> > + }
> > +
> > + /* got a logo in response to adisc to a target which has logged out */
> > + if (tport->state == FDLS_TGT_STATE_ADISC) {
> > + tport->retry_counter = 0;
> > + oxid = ntohs(tport->oxid_used);
> > + fdls_free_tgt_oxid(iport, oxid);
> > + fdls_delete_tport(iport, tport);
> > + fdls_send_logo_resp(iport, &logo->fchdr);
> > + if ((iport->state == FNIC_IPORT_STATE_READY)
> > + && (fdls_get_state(&iport->fabric) != FDLS_STATE_SEND_GPNFT)
> > + && (fdls_get_state(&iport->fabric) != FDLS_STATE_RSCN_GPN_FT)) {
> > + FNIC_FCS_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,
> > + "Sending GPNFT in response to LOGO from Target:0x%x",
> > + nport_id);
> > + fdls_send_gpn_ft(iport, FDLS_STATE_SEND_GPNFT);
> > + return;
> > + }
> > + } else {
> > + fdls_delete_tport(iport, tport);
> > + }
> > + if (iport->state == FNIC_IPORT_STATE_READY) {
> > + fdls_send_logo_resp(iport, &logo->fchdr);
> > + if ((fdls_get_state(&iport->fabric) != FDLS_STATE_SEND_GPNFT) &&
> > + (fdls_get_state(&iport->fabric) != FDLS_STATE_RSCN_GPN_FT)) {
> > + FNIC_FCS_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,
> > + "Sending GPNFT in response to LOGO from Target:0x%x",
> > + nport_id);
> > + fdls_send_gpn_ft(iport, FDLS_STATE_SEND_GPNFT);
> > + }
> > + }
> > +}
> > +
> > +static void
> > +fdls_process_rscn(struct fnic_iport_s *iport, struct fc_hdr_s *fchdr)
> > +{
> > + struct fc_rscn_hdr_s *rscn;
> > + struct fc_rscn_port_s *rscn_port = NULL;
> > + int num_ports;
> > + struct fnic_tport_s *tport, *next;
> > + uint32_t nport_id;
> > + uint8_t fcid[3];
> > + int newports = 0;
> > + struct fnic_fdls_fabric_s *fdls = &iport->fabric;
> > + struct fnic *fnic = iport->fnic;
> > +
> > + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > + "FDLS process RSCN %p", iport);
> > +
> > + if (iport->state != FNIC_IPORT_STATE_READY) {
> > + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > + "FDLS RSCN received in state(%d). Dropping",
> > + fdls_get_state(fdls));
> > + return;
> > + }
> > +
> > + rscn = (struct fc_rscn_hdr_s *) fchdr;
> > + /* frame validation */
> > + if ((rscn->payload_len % 4 != 0) || (rscn->payload_len < 8)
> > + || (rscn->payload_len > 1024) || (rscn->page_len != 4)) {
> > + num_ports = 0;
> > + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > + "RSCN payload_len: 0x%x page_len: 0x%x",
> > + rscn->payload_len, rscn->page_len);
> > + /* if this happens then we need to send ADISC to all the tports. */
> > + list_for_each_entry_safe(tport, next, &iport->tport_list, links) {
> > + if (tport->state == FDLS_TGT_STATE_READY)
> > + tport->flags |= FNIC_FDLS_TPORT_SEND_ADISC;
> > + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > + "RSCN for port id: 0x%x", tport->fcid);
> > + }
> > + } else {
> > + num_ports = (rscn->payload_len - 4) / rscn->page_len;
> > + rscn_port = (struct fc_rscn_port_s *) (rscn + 1);
> > + }
> > + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > + "RSCN received for num_ports: %d payload_len: %d page_len: %d ",
> > + num_ports, rscn->payload_len, rscn->page_len);
> > +
> > + /*
> > + * RSCN have at least one Port_ID page , but may not have any port_id
> > + * in it. If no port_id is specified in the Port_ID page , we send
> > + * ADISC to all the tports
> > + */
> > +
> > + while (num_ports) {
> > +
> > + memcpy(fcid, rscn_port->port_id, 3);
> > +
> > + nport_id = ntoh24(fcid);
> > + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > + "RSCN event: 0x%x for 0x%x", rscn_port->rscn_evt_q,
> > + nport_id);
> > + rscn_port++;
> > + num_ports--;
> > + /* if this happens then we need to send ADISC to all the tports. */
> > + if (nport_id == 0) {
> > + list_for_each_entry_safe(tport, next, &iport->tport_list,
> > + links) {
> > + if (tport->state == FDLS_TGT_STATE_READY)
> > + tport->flags |= FNIC_FDLS_TPORT_SEND_ADISC;
> > +
> > + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > + "RSCN for port id: 0x%x", tport->fcid);
> > + }
> > + break;
> > + }
> > + tport = fnic_find_tport_by_fcid(iport, nport_id);
> > +
> > + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > + "RSCN port id list: 0x%x", nport_id);
> > +
> > + if (!tport) {
> > + newports++;
> > + continue;
> > + }
> > + if (tport->state == FDLS_TGT_STATE_READY)
> > + tport->flags |= FNIC_FDLS_TPORT_SEND_ADISC;
> > + }
> > +
> > + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > + "FDLS process RSCN sending GPN_FT %p", iport);
> > + fdls_send_gpn_ft(iport, FDLS_STATE_RSCN_GPN_FT);
> > + fdls_send_rscn_resp(iport, fchdr);
> > +}
> > +
> > +static void
> > +fdls_process_adisc_req(struct fnic_iport_s *iport, struct fc_hdr_s
> > +*fchdr) {
> > + struct fc_els_adisc_ls_acc_s adisc_acc;
> > + struct fc_els_adisc_s *adisc_req = (struct fc_els_adisc_s *) fchdr;
> > + uint64_t frame_wwnn;
> > + uint64_t frame_wwpn;
> > + uint32_t tgt_fcid;
> > + struct fnic_tport_s *tport;
> > + uint8_t *fcid;
> > + struct fc_els_reject_s rjts_rsp;
> > + uint16_t oxid;
> > + struct fnic *fnic = iport->fnic;
> > +
> > + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > + "Process ADISC request %d", iport->fnic->fnic_num);
> > +
> > + fcid = FNIC_GET_S_ID(fchdr);
> > + tgt_fcid = ntoh24(fcid);
> > + tport = fnic_find_tport_by_fcid(iport, tgt_fcid);
> > + if (!tport) {
> > + FNIC_FCS_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,
> > + "tport for fcid: 0x%x not found. Dropping ADISC req.",
> > + tgt_fcid);
> > + return;
> > + }
> > + if (iport->state != FNIC_IPORT_STATE_READY) {
> > + FNIC_FCS_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,
> > + "Dropping ADISC req from fcid: 0x%x in iport state: %d",
> > + tgt_fcid, iport->state);
> > + return;
> > + }
> > +
> > + frame_wwnn = ntohll(adisc_req->node_name);
> > + frame_wwpn = ntohll(adisc_req->nport_name);
> > +
> > + if ((frame_wwnn != tport->wwnn) || (frame_wwpn != tport->wwpn)) {
> > + /* send reject */
> > + FNIC_FCS_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,
> > + "ADISC req from fcid: 0x%x mismatch wwpn: 0x%llx wwnn: 0x%llx",
> > + tgt_fcid, frame_wwpn, frame_wwnn);
> > + FNIC_FCS_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,
> > + "local tport wwpn: 0x%llx wwnn: 0x%llx. Sending RJT",
> > + tport->wwpn, tport->wwnn);
> > +
> > + memcpy(&rjts_rsp, &fnic_els_rjt, sizeof(struct fc_els_reject_s));
> > +
> > + rjts_rsp.reason_code = 0x03; /* logical error */
> > + rjts_rsp.reason_expl = 0x1E; /* N_port login required */
> > + rjts_rsp.vendor_specific = 0x0;
> > + FNIC_SET_S_ID((&rjts_rsp.fchdr), fchdr->did);
> > + FNIC_SET_D_ID((&rjts_rsp.fchdr), fchdr->sid);
> > + oxid = FNIC_GET_OX_ID(fchdr);
> > + FNIC_SET_OX_ID((&rjts_rsp.fchdr), oxid);
> > + FNIC_SET_RX_ID((&rjts_rsp.fchdr), FNIC_ADISC_RESP_OXID);
> > + fnic_send_fcoe_frame(iport, &rjts_rsp,
> > + sizeof(struct fc_els_reject_s));
> > + return;
> > + }
> > + memset(&adisc_acc.fchdr, 0, sizeof(struct fc_hdr_s));
> > + FNIC_SET_S_ID((&adisc_acc.fchdr), fchdr->did);
> > + FNIC_SET_D_ID((&adisc_acc.fchdr), fchdr->sid);
> > + adisc_acc.fchdr.f_ctl = FNIC_ELS_REP_FCTL;
> > + adisc_acc.fchdr.r_ctl = 0x23;
> > + adisc_acc.fchdr.type = 0x01;
> > + oxid = FNIC_GET_OX_ID(fchdr);
> > + FNIC_SET_OX_ID((&adisc_acc.fchdr), oxid);
> > + FNIC_SET_RX_ID((&adisc_acc.fchdr), FNIC_ADISC_RESP_OXID);
> > + adisc_acc.command = FC_LS_ACC;
> > +
> > + FNIC_SET_NPORT_NAME(adisc_acc, iport->wwpn);
> > + FNIC_SET_NODE_NAME(adisc_acc, iport->wwnn);
> > + memcpy(adisc_acc.fcid, fchdr->did, 3);
> > + fnic_send_fcoe_frame(iport, &adisc_acc,
> > + sizeof(struct fc_els_adisc_ls_acc_s));
>
> Indentation again.
Sure. I'll fix this in the next version.
> > +}
> > +
> > /*
> > * Performs a validation for all FCOE frames and return the frame type
> > */
> > @@ -2954,6 +3489,31 @@ void fnic_fdls_recv_frame(struct fnic_iport_s *iport, void *rx_frame,
> > } else
> > fdls_process_tgt_abts_rsp(iport, fchdr);
> > break;
> > + case FNIC_BLS_ABTS_REQ:
> > + fdls_process_abts_req(iport, fchdr);
> > + break;
> > + case FNIC_ELS_UNSUPPORTED_REQ:
> > + fdls_process_unsupported_els_req(iport, fchdr);
> > + break;
> > + case FNIC_ELS_PLOGI_REQ:
> > + fdls_process_plogi_req(iport, fchdr);
> > + break;
> > + case FNIC_ELS_RSCN_REQ:
> > + fdls_process_rscn(iport, fchdr);
> > + break;
> > + case FNIC_ELS_LOGO_REQ:
> > + fdls_process_logo_req(iport, fchdr);
> > + break;
> > + case FNIC_ELS_RRQ:
> > + case FNIC_ELS_ECHO_REQ:
> > + fdls_process_els_req(iport, fchdr, len);
> > + break;
> > + case FNIC_ELS_ADISC:
> > + fdls_process_adisc_req(iport, fchdr);
> > + break;
> > + case FNIC_ELS_RLS:
> > + fdls_process_rls_req(iport, fchdr);
> > + break;
> > default:
> > FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > "Received unknown FCoE frame of len: %d. Dropping frame", len);
>
> Cheers,
>
> Hannes
> --
> Dr. Hannes Reinecke Kernel Storage Architect
> hare@...e.de +49 911 74053 688
> SUSE Software Solutions GmbH, Frankenstr. 146, 90461 Nürnberg HRB 36809 (AG Nürnberg), GF: I. Totev, A. McDonald, W. Knoblich
>
>
Regards,
Karan
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