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Message-ID: <026f05ed-58b9-4487-8600-5b5e59b685d7@suse.de>
Date: Thu, 24 Oct 2024 09:13:03 +0200
From: Hannes Reinecke <hare@...e.de>
To: Karan Tilak Kumar <kartilak@...co.com>, sebaddel@...co.com
Cc: arulponn@...co.com, djhawar@...co.com, gcboffa@...co.com,
mkai2@...co.com, satishkh@...co.com, aeasi@...co.com, jejb@...ux.ibm.com,
martin.petersen@...cle.com, linux-scsi@...r.kernel.org,
linux-kernel@...r.kernel.org, kernel test robot <lkp@...el.com>
Subject: Re: [PATCH v5 05/14] scsi: fnic: Add support for unsolicited requests
and responses
On 10/18/24 18:14, Karan Tilak Kumar wrote:
> Add support for unsolicited requests and responses.
> Add support to accept and reject frames.
>
> Reported-by: kernel test robot <lkp@...el.com>
> Closes:
> https://lore.kernel.org/oe-kbuild-all/202409291705.MugERX98-lkp@
> intel.com/
>
> Reviewed-by: Sesidhar Baddela <sebaddel@...co.com>
> Co-developed-by: Gian Carlo Boffa <gcboffa@...co.com>
> Signed-off-by: Gian Carlo Boffa <gcboffa@...co.com>
> Co-developed-by: Arulprabhu Ponnusamy <arulponn@...co.com>
> Signed-off-by: Arulprabhu Ponnusamy <arulponn@...co.com>
> Co-developed-by: Arun Easi <aeasi@...co.com>
> Signed-off-by: Arun Easi <aeasi@...co.com>
> Co-developed-by: Karan Tilak Kumar <kartilak@...co.com>
> Signed-off-by: Karan Tilak Kumar <kartilak@...co.com>
> ---
> Changes between v4 and v5:
> Incorporate review comments from Martin:
> Remove unnecessary fdls_get_tgt_oxid_pool call.
> Modify attribution appropriately.
>
> Changes between v3 and v4:
> Fix kernel test robot warnings.
>
> Changes between v2 and v3:
> Add fnic_std_ba_acc removed from previous patch.
> Incorporate review comments from Hannes:
> Replace redundant definitions with standard definitions.
>
> Changes between v1 and v2:
> Incorporate review comments from Hannes:
> Replace fnic_del_tport_timer_sync macro calls with function
> calls.
> Fix indentation.
> Replace definitions with standard definitions from fc_els.h.
> ---
> drivers/scsi/fnic/fdls_disc.c | 579 +++++++++++++++++++++++++++++++++-
> 1 file changed, 576 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/scsi/fnic/fdls_disc.c b/drivers/scsi/fnic/fdls_disc.c
> index 52459f6bb589..a9a98ddc3a84 100644
> --- a/drivers/scsi/fnic/fdls_disc.c
> +++ b/drivers/scsi/fnic/fdls_disc.c
> @@ -142,6 +142,22 @@ struct fc_std_scr fnic_std_scr_req = {
> .scr_reg_func = ELS_SCRF_FULL}
> };
>
> +/*
> + * Variables:
> + * did, ox_id, rx_id
> + */
> +struct fc_std_els_rsp fnic_std_els_acc = {
> + .fchdr = {.fh_r_ctl = FC_RCTL_ELS_REP, .fh_d_id = {0xFF, 0xFF, 0xFD},
> + .fh_type = FC_TYPE_ELS, .fh_f_ctl = {FNIC_ELS_REP_FCTL, 0, 0}},
> + .u.acc.la_cmd = ELS_LS_ACC,
> +};
> +
> +struct fc_std_els_rsp fnic_std_els_rjt = {
> + .fchdr = {.fh_r_ctl = FC_RCTL_ELS_REP, .fh_type = FC_TYPE_ELS,
> + .fh_f_ctl = {FNIC_ELS_REP_FCTL, 0, 0}},
> + .u.rej.er_cmd = ELS_LS_RJT,
> +};
> +
> /*
> * Variables:
> * did, ox_id, rx_id, fcid, wwpn
> @@ -169,6 +185,12 @@ struct fc_frame_header fc_std_tport_abts = {
> .fh_parm_offset = 0x00000000, /* bit:0 = 0 Abort a exchange */
> };
>
> +static struct fc_std_abts_ba_acc fnic_std_ba_acc = {
> + .fchdr = {.fh_r_ctl = FC_RCTL_BA_ACC,
> + .fh_f_ctl = {FNIC_FCP_RSP_FCTL, 0, 0}},
> + .acc = {.ba_low_seq_cnt = 0, .ba_high_seq_cnt = 0xFFFF}
> +};
> +
> #define RETRIES_EXHAUSTED(iport) \
> (iport->fabric.retry_counter == FABRIC_LOGO_MAX_RETRY)
>
> @@ -202,7 +224,6 @@ 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_tport_timer_callback(struct timer_list *t);
> -
> static void fdls_start_fabric_timer(struct fnic_iport_s *iport,
> int timeout);
> static void
> @@ -507,6 +528,50 @@ 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_frame_header *rscn_fchdr)
> +{
> + struct fc_std_els_rsp els_acc;
> + uint16_t oxid;
> + uint8_t fcid[3];
> +
> + memcpy(&els_acc, &fnic_std_els_acc, FC_ELS_RSP_ACC_SIZE);
> +
As indicated previously; move the static initializer into
the function and avoid the memcpy.
> + hton24(fcid, iport->fcid);
> + FNIC_STD_SET_S_ID((&els_acc.fchdr), fcid);
> + FNIC_STD_SET_D_ID((&els_acc.fchdr), rscn_fchdr->fh_s_id);
> +
> + oxid = FNIC_STD_GET_OX_ID(rscn_fchdr);
> + FNIC_STD_SET_OX_ID((&els_acc.fchdr), oxid);
> +
> + FNIC_STD_SET_RX_ID((&els_acc.fchdr), FNIC_UNASSIGNED_RXID);
> +
> + fnic_send_fcoe_frame(iport, &els_acc, FC_ELS_RSP_ACC_SIZE);
> +}
> +
> +static void
> +fdls_send_logo_resp(struct fnic_iport_s *iport,
> + struct fc_frame_header *req_fchdr)
> +{
> + struct fc_std_els_rsp logo_resp;
> + uint16_t oxid;
> + uint8_t fcid[3];
> +
> + memcpy(&logo_resp, &fnic_std_els_acc, sizeof(struct fc_std_els_rsp));
Same here.
> +
> + hton24(fcid, iport->fcid);
> + FNIC_STD_SET_S_ID((&logo_resp.fchdr), fcid);
> + FNIC_STD_SET_D_ID((&logo_resp.fchdr), req_fchdr->fh_s_id);
> +
> + oxid = FNIC_STD_GET_OX_ID(req_fchdr);
> + FNIC_STD_SET_OX_ID((&logo_resp.fchdr), oxid);
> +
> + FNIC_STD_SET_RX_ID((&logo_resp.fchdr), FNIC_UNASSIGNED_RXID);
> +
> + fnic_send_fcoe_frame(iport, &logo_resp, FC_ELS_RSP_ACC_SIZE);
> +}
> +
> void
> fdls_send_tport_abts(struct fnic_iport_s *iport,
> struct fnic_tport_s *tport)
> @@ -1047,7 +1112,6 @@ fdls_send_tgt_prli(struct fnic_iport_s *iport, struct fnic_tport_s *tport)
>
> timeout = max(2 * iport->e_d_tov, iport->plogi_timeout);
>
> - fdls_get_tgt_oxid_pool(tport);
> fnic_send_fcoe_frame(iport, &prli, sizeof(struct fc_std_els_prli));
> /* Even if fnic_send_fcoe_frame() fails we want to retry after timeout */
> fdls_start_tport_timer(iport, tport, timeout);
> @@ -2890,6 +2954,192 @@ fdls_process_fabric_abts_rsp(struct fnic_iport_s *iport,
> }
> }
>
> +static void
> +fdls_process_abts_req(struct fnic_iport_s *iport, struct fc_frame_header *fchdr)
> +{
> + struct fc_std_abts_ba_acc ba_acc;
> + uint32_t nport_id;
> + uint16_t oxid;
> + struct fnic_tport_s *tport;
> + struct fnic *fnic = iport->fnic;
> + struct fnic_tgt_oxid_pool_s *oxid_pool;
> +
> + nport_id = ntoh24(fchdr->fh_s_id);
> + 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_STD_GET_OX_ID(fchdr);
> + if (tport->oxid_used == oxid) {
> + tport->flags |= FNIC_FDLS_TGT_ABORT_ISSUED;
> + oxid_pool = fdls_get_tgt_oxid_pool(tport);
> + fdls_free_tgt_oxid(iport, oxid_pool, ntohs(oxid));
> + }
> + }
> +
> + memcpy(&ba_acc, &fnic_std_ba_acc, sizeof(struct fc_std_abts_ba_acc));
And here.
> + FNIC_STD_SET_S_ID((&ba_acc.fchdr), fchdr->fh_d_id);
> + FNIC_STD_SET_D_ID((&ba_acc.fchdr), fchdr->fh_s_id);
> +
> + ba_acc.fchdr.fh_rx_id = fchdr->fh_rx_id;
> + ba_acc.acc.ba_rx_id = ba_acc.fchdr.fh_rx_id;
> + ba_acc.fchdr.fh_ox_id = fchdr->fh_ox_id;
> + ba_acc.acc.ba_ox_id = ba_acc.fchdr.fh_ox_id;
Especially as you have to set fields in the request afterwards anyway.
> +
> + fnic_send_fcoe_frame(iport, &ba_acc, sizeof(struct fc_std_abts_ba_acc));
> +}
> +
> +static void
> +fdls_process_unsupported_els_req(struct fnic_iport_s *iport,
> + struct fc_frame_header *fchdr)
> +{
> + struct fc_std_els_rsp ls_rsp;
> + uint16_t oxid;
> + uint32_t d_id = ntoh24(fchdr->fh_d_id);
> + struct fnic *fnic = iport->fnic;
> +
> + memcpy(&ls_rsp, &fnic_std_els_rjt, FC_ELS_RSP_REJ_SIZE);
memcpy again.
> +
> + 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->fh_s_id));
> + /* We don't support this ELS request, send a reject */
> + ls_rsp.u.rej.er_reason = 0x0B;
> + ls_rsp.u.rej.er_explan = 0x0;
> + ls_rsp.u.rej.er_vendor = 0x0;
> +
> + FNIC_STD_SET_S_ID((&ls_rsp.fchdr), fchdr->fh_d_id);
> + FNIC_STD_SET_D_ID((&ls_rsp.fchdr), fchdr->fh_s_id);
> + oxid = FNIC_STD_GET_OX_ID(fchdr);
> + FNIC_STD_SET_OX_ID((&ls_rsp.fchdr), oxid);
> +
> + FNIC_STD_SET_RX_ID((&ls_rsp.fchdr), FNIC_UNSUPPORTED_RESP_OXID);
> +
> + fnic_send_fcoe_frame(iport, &ls_rsp, FC_ELS_RSP_REJ_SIZE);
> +}
> +
> +static void
> +fdls_process_rls_req(struct fnic_iport_s *iport, struct fc_frame_header *fchdr)
> +{
> + struct fc_std_rls_acc 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_std_rls_acc));
???
What is this? Memsetting only parts of the request?
Why not the full request?
> +
> + FNIC_STD_SET_S_ID((&rls_acc_rsp.fchdr), fchdr->fh_d_id);
> + FNIC_STD_SET_D_ID((&rls_acc_rsp.fchdr), fchdr->fh_s_id);
> + oxid = FNIC_STD_GET_OX_ID(fchdr);
> + FNIC_STD_SET_OX_ID((&rls_acc_rsp.fchdr), oxid);
> + FNIC_STD_SET_RX_ID((&rls_acc_rsp.fchdr), 0xffff);
> + FNIC_STD_SET_F_CTL(&rls_acc_rsp.fchdr, FNIC_ELS_REP_FCTL << 16);
> + FNIC_STD_SET_R_CTL(&rls_acc_rsp.fchdr, FC_RCTL_ELS_REP);
> + FNIC_STD_SET_TYPE(&rls_acc_rsp.fchdr, FC_TYPE_ELS);
> + rls_acc_rsp.els.rls_cmd = ELS_LS_ACC;
> + rls_acc_rsp.els.rls_lesb.lesb_link_fail =
> + htonl(iport->fnic->link_down_cnt);
> +
> + fnic_send_fcoe_frame(iport, &rls_acc_rsp,
> + sizeof(struct fc_std_rls_acc));
> +}
> +
> +static void
> +fdls_process_els_req(struct fnic_iport_s *iport, struct fc_frame_header *fchdr,
> + uint32_t len)
> +{
> + struct fc_std_els_rsp *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_frame_header);
> + 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 ELS_ECHO:
> + 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 ELS_RRQ:
> + 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 == ELS_ECHO) {
> + /* Brocade sends a longer payload, copy all frame back */
> + memcpy(dst_frame, fchdr, len);
> + }
> +
> + els_acc = (struct fc_std_els_rsp *)dst_frame;
> + memcpy(els_acc, &fnic_std_els_acc, FC_ELS_RSP_ACC_SIZE);
Memcpy again.
> +
> + hton24(fcid, iport->fcid);
> + FNIC_STD_SET_S_ID((&els_acc->fchdr), fcid);
> + FNIC_STD_SET_D_ID((&els_acc->fchdr), fchdr->fh_s_id);
> +
> + oxid = FNIC_STD_GET_OX_ID(fchdr);
> + FNIC_STD_SET_OX_ID((&els_acc->fchdr), oxid);
> + FNIC_STD_SET_RX_ID((&els_acc->fchdr), 0xffff);
> +
> + if (type == ELS_ECHO)
> + fnic_send_fcoe_frame(iport, els_acc, len);
> + else
> + fnic_send_fcoe_frame(iport, els_acc, FC_ELS_RSP_ACC_SIZE);
> +
> + kfree(dst_frame);
> +}
> +
> static void
> fdls_process_tgt_abts_rsp(struct fnic_iport_s *iport,
> struct fc_frame_header *fchdr)
> @@ -3032,6 +3282,303 @@ 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_frame_header *fchdr)
> +{
> + struct fc_std_els_rsp plogi_rsp;
> + uint16_t oxid;
> + uint32_t d_id = ntoh24(fchdr->fh_d_id);
> + struct fnic *fnic = iport->fnic;
> +
> + memcpy(&plogi_rsp, &fnic_std_els_rjt, sizeof(struct fc_std_els_rsp));
And here.
> +
> + 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->fh_s_id));
> +
> + /* We don't support PLOGI request, send a reject */
> + plogi_rsp.u.rej.er_reason = 0x0B;
> + plogi_rsp.u.rej.er_explan = 0x0;
> + plogi_rsp.u.rej.er_vendor = 0x0;
> +
> + FNIC_STD_SET_S_ID((&plogi_rsp.fchdr), fchdr->fh_d_id);
> + FNIC_STD_SET_D_ID((&plogi_rsp.fchdr), fchdr->fh_s_id);
> +
> + oxid = FNIC_STD_GET_OX_ID(fchdr);
> + FNIC_STD_SET_OX_ID((&plogi_rsp.fchdr), oxid);
> +
> + FNIC_STD_SET_RX_ID((&plogi_rsp.fchdr), FNIC_UNASSIGNED_RXID);
> +
> + fnic_send_fcoe_frame(iport, &plogi_rsp, FC_ELS_RSP_REJ_SIZE);
> +}
> +
> +static void
> +fdls_process_logo_req(struct fnic_iport_s *iport, struct fc_frame_header *fchdr)
> +{
> + struct fc_std_logo *logo = (struct fc_std_logo *)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->els.fl_n_port_id);
> + nport_name = logo->els.fl_n_port_wwn;
> +
> + 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(0x%llx)",
> + nport_id, nport_name);
> + 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(0x%llx)",
> + nport_id, nport_name);
> + 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(fnic, tport);
> + 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, &iport->adisc_oxid_pool, 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_frame_header *fchdr)
> +{
> + struct fc_std_rscn *rscn;
> + struct fc_els_rscn_page *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;
> + uint16_t rscn_payload_len;
> +
> + 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_std_rscn *)fchdr;
> + rscn_payload_len = be16_to_cpu(rscn->els.rscn_plen);
> +
> + /* frame validation */
> + if ((rscn_payload_len % 4 != 0) || (rscn_payload_len < 8)
> + || (rscn_payload_len > 1024)
> + || (rscn->els.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->els.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->els.rscn_page_len;
> + rscn_port = (struct fc_els_rscn_page *)(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->els.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->rscn_fid, 3);
> +
> + nport_id = ntoh24(fcid);
> + 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: newports: %d", newports);
> + 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_frame_header *fchdr)
> +{
> + struct fc_std_els_adisc adisc_acc;
> + struct fc_std_els_adisc *adisc_req = (struct fc_std_els_adisc *)fchdr;
> + uint64_t frame_wwnn;
> + uint64_t frame_wwpn;
> + uint32_t tgt_fcid;
> + struct fnic_tport_s *tport;
> + uint8_t *fcid;
> + struct fc_std_els_rsp 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_STD_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->els.adisc_wwnn);
> + frame_wwpn = ntohll(adisc_req->els.adisc_wwpn);
> +
> + 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_std_els_rjt,
> + sizeof(struct fc_std_els_rsp));
> +
And here.
> + rjts_rsp.u.rej.er_reason = 0x03; /* logical error */
> + rjts_rsp.u.rej.er_explan = 0x1E; /* N_port login required */
> + rjts_rsp.u.rej.er_vendor = 0x0;
> + FNIC_STD_SET_S_ID((&rjts_rsp.fchdr), fchdr->fh_d_id);
> + FNIC_STD_SET_D_ID((&rjts_rsp.fchdr), fchdr->fh_s_id);
> + oxid = FNIC_STD_GET_OX_ID(fchdr);
> + FNIC_STD_SET_OX_ID((&rjts_rsp.fchdr), oxid);
> + FNIC_STD_SET_RX_ID((&rjts_rsp.fchdr), FNIC_UNASSIGNED_RXID);
> +
> + fnic_send_fcoe_frame(iport, &rjts_rsp, FC_ELS_RSP_REJ_SIZE);
> + return;
> + }
> + memset(&adisc_acc.fchdr, 0, sizeof(struct fc_frame_header));
> + FNIC_STD_SET_S_ID(&adisc_acc.fchdr, fchdr->fh_d_id);
> + FNIC_STD_SET_D_ID(&adisc_acc.fchdr, fchdr->fh_s_id);
> + FNIC_STD_SET_F_CTL(&adisc_acc.fchdr, FNIC_ELS_REP_FCTL << 16);
> + FNIC_STD_SET_R_CTL(&adisc_acc.fchdr, FC_RCTL_ELS_REP);
> + FNIC_STD_SET_TYPE(&adisc_acc.fchdr, FC_TYPE_ELS);
> + oxid = FNIC_STD_GET_OX_ID(fchdr);
> + FNIC_STD_SET_OX_ID(&adisc_acc.fchdr, oxid);
> + FNIC_STD_SET_RX_ID(&adisc_acc.fchdr, FNIC_UNASSIGNED_RXID);
> + adisc_acc.els.adisc_cmd = ELS_LS_ACC;
> +
> + FNIC_STD_SET_NPORT_NAME(&adisc_acc.els.adisc_wwpn,
> + le64_to_cpu(iport->wwpn));
> + FNIC_STD_SET_NODE_NAME(&adisc_acc.els.adisc_wwnn,
> + le64_to_cpu(iport->wwnn));
> + memcpy(adisc_acc.els.adisc_port_id, fchdr->fh_d_id, 3);
> +
> + fnic_send_fcoe_frame(iport, &adisc_acc,
> + sizeof(struct fc_std_els_adisc));
> +}
> +
> /*
> * Performs a validation for all FCOE frames and return the frame type
> */
> @@ -3314,8 +3861,34 @@ void fnic_fdls_recv_frame(struct fnic_iport_s *iport, void *rx_frame,
> if (fdls_is_oxid_in_fabric_range(oxid) &&
> (iport->fabric.flags & FNIC_FDLS_FABRIC_ABORT_ISSUED)) {
> fdls_process_fabric_abts_rsp(iport, fchdr);
> - } else
> + } 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,
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
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