diff options
Diffstat (limited to 'drivers/scsi/libfc/fc_lport.c')
| -rw-r--r-- | drivers/scsi/libfc/fc_lport.c | 1604 |
1 files changed, 1604 insertions, 0 deletions
diff --git a/drivers/scsi/libfc/fc_lport.c b/drivers/scsi/libfc/fc_lport.c new file mode 100644 index 000000000000..0b9bdb1fb807 --- /dev/null +++ b/drivers/scsi/libfc/fc_lport.c @@ -0,0 +1,1604 @@ +/* + * Copyright(c) 2007 Intel Corporation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along with + * this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. + * + * Maintained at www.Open-FCoE.org + */ + +/* + * PORT LOCKING NOTES + * + * These comments only apply to the 'port code' which consists of the lport, + * disc and rport blocks. + * + * MOTIVATION + * + * The lport, disc and rport blocks all have mutexes that are used to protect + * those objects. The main motivation for these locks is to prevent from + * having an lport reset just before we send a frame. In that scenario the + * lport's FID would get set to zero and then we'd send a frame with an + * invalid SID. We also need to ensure that states don't change unexpectedly + * while processing another state. + * + * HEIRARCHY + * + * The following heirarchy defines the locking rules. A greater lock + * may be held before acquiring a lesser lock, but a lesser lock should never + * be held while attempting to acquire a greater lock. Here is the heirarchy- + * + * lport > disc, lport > rport, disc > rport + * + * CALLBACKS + * + * The callbacks cause complications with this scheme. There is a callback + * from the rport (to either lport or disc) and a callback from disc + * (to the lport). + * + * As rports exit the rport state machine a callback is made to the owner of + * the rport to notify success or failure. Since the callback is likely to + * cause the lport or disc to grab its lock we cannot hold the rport lock + * while making the callback. To ensure that the rport is not free'd while + * processing the callback the rport callbacks are serialized through a + * single-threaded workqueue. An rport would never be free'd while in a + * callback handler becuase no other rport work in this queue can be executed + * at the same time. + * + * When discovery succeeds or fails a callback is made to the lport as + * notification. Currently, succesful discovery causes the lport to take no + * action. A failure will cause the lport to reset. There is likely a circular + * locking problem with this implementation. + */ + +/* + * LPORT LOCKING + * + * The critical sections protected by the lport's mutex are quite broad and + * may be improved upon in the future. The lport code and its locking doesn't + * influence the I/O path, so excessive locking doesn't penalize I/O + * performance. + * + * The strategy is to lock whenever processing a request or response. Note + * that every _enter_* function corresponds to a state change. They generally + * change the lports state and then send a request out on the wire. We lock + * before calling any of these functions to protect that state change. This + * means that the entry points into the lport block manage the locks while + * the state machine can transition between states (i.e. _enter_* functions) + * while always staying protected. + * + * When handling responses we also hold the lport mutex broadly. When the + * lport receives the response frame it locks the mutex and then calls the + * appropriate handler for the particuar response. Generally a response will + * trigger a state change and so the lock must already be held. + * + * Retries also have to consider the locking. The retries occur from a work + * context and the work function will lock the lport and then retry the state + * (i.e. _enter_* function). + */ + +#include <linux/timer.h> +#include <asm/unaligned.h> + +#include <scsi/fc/fc_gs.h> + +#include <scsi/libfc.h> +#include <scsi/fc_encode.h> + +/* Fabric IDs to use for point-to-point mode, chosen on whims. */ +#define FC_LOCAL_PTP_FID_LO 0x010101 +#define FC_LOCAL_PTP_FID_HI 0x010102 + +#define DNS_DELAY 3 /* Discovery delay after RSCN (in seconds)*/ + +static int fc_lport_debug; + +#define FC_DEBUG_LPORT(fmt...) \ + do { \ + if (fc_lport_debug) \ + FC_DBG(fmt); \ + } while (0) + +static void fc_lport_error(struct fc_lport *, struct fc_frame *); + +static void fc_lport_enter_reset(struct fc_lport *); +static void fc_lport_enter_flogi(struct fc_lport *); +static void fc_lport_enter_dns(struct fc_lport *); +static void fc_lport_enter_rpn_id(struct fc_lport *); +static void fc_lport_enter_rft_id(struct fc_lport *); +static void fc_lport_enter_scr(struct fc_lport *); +static void fc_lport_enter_ready(struct fc_lport *); +static void fc_lport_enter_logo(struct fc_lport *); + +static const char *fc_lport_state_names[] = { + [LPORT_ST_NONE] = "none", + [LPORT_ST_FLOGI] = "FLOGI", + [LPORT_ST_DNS] = "dNS", + [LPORT_ST_RPN_ID] = "RPN_ID", + [LPORT_ST_RFT_ID] = "RFT_ID", + [LPORT_ST_SCR] = "SCR", + [LPORT_ST_READY] = "Ready", + [LPORT_ST_LOGO] = "LOGO", + [LPORT_ST_RESET] = "reset", +}; + +static int fc_frame_drop(struct fc_lport *lport, struct fc_frame *fp) +{ + fc_frame_free(fp); + return 0; +} + +/** + * fc_lport_rport_callback - Event handler for rport events + * @lport: The lport which is receiving the event + * @rport: The rport which the event has occured on + * @event: The event that occured + * + * Locking Note: The rport lock should not be held when calling + * this function. + */ +static void fc_lport_rport_callback(struct fc_lport *lport, + struct fc_rport *rport, + enum fc_rport_event event) +{ + FC_DEBUG_LPORT("Received a %d event for port (%6x)\n", event, + rport->port_id); + + switch (event) { + case RPORT_EV_CREATED: + if (rport->port_id == FC_FID_DIR_SERV) { + mutex_lock(&lport->lp_mutex); + if (lport->state == LPORT_ST_DNS) { + lport->dns_rp = rport; + fc_lport_enter_rpn_id(lport); + } else { + FC_DEBUG_LPORT("Received an CREATED event on " + "port (%6x) for the directory " + "server, but the lport is not " + "in the DNS state, it's in the " + "%d state", rport->port_id, + lport->state); + lport->tt.rport_logoff(rport); + } + mutex_unlock(&lport->lp_mutex); + } else + FC_DEBUG_LPORT("Received an event for port (%6x) " + "which is not the directory server\n", + rport->port_id); + break; + case RPORT_EV_LOGO: + case RPORT_EV_FAILED: + case RPORT_EV_STOP: + if (rport->port_id == FC_FID_DIR_SERV) { + mutex_lock(&lport->lp_mutex); + lport->dns_rp = NULL; + mutex_unlock(&lport->lp_mutex); + + } else + FC_DEBUG_LPORT("Received an event for port (%6x) " + "which is not the directory server\n", + rport->port_id); + break; + case RPORT_EV_NONE: + break; + } +} + +/** + * fc_lport_state - Return a string which represents the lport's state + * @lport: The lport whose state is to converted to a string + */ +static const char *fc_lport_state(struct fc_lport *lport) +{ + const char *cp; + + cp = fc_lport_state_names[lport->state]; + if (!cp) + cp = "unknown"; + return cp; +} + +/** + * fc_lport_ptp_setup - Create an rport for point-to-point mode + * @lport: The lport to attach the ptp rport to + * @fid: The FID of the ptp rport + * @remote_wwpn: The WWPN of the ptp rport + * @remote_wwnn: The WWNN of the ptp rport + */ +static void fc_lport_ptp_setup(struct fc_lport *lport, + u32 remote_fid, u64 remote_wwpn, + u64 remote_wwnn) +{ + struct fc_disc_port dp; + + dp.lp = lport; + dp.ids.port_id = remote_fid; + dp.ids.port_name = remote_wwpn; + dp.ids.node_name = remote_wwnn; + dp.ids.roles = FC_RPORT_ROLE_UNKNOWN; + + if (lport->ptp_rp) { + lport->tt.rport_logoff(lport->ptp_rp); + lport->ptp_rp = NULL; + } + + lport->ptp_rp = fc_rport_rogue_create(&dp); + + lport->tt.rport_login(lport->ptp_rp); + + fc_lport_enter_ready(lport); +} + +void fc_get_host_port_type(struct Scsi_Host *shost) +{ + /* TODO - currently just NPORT */ + fc_host_port_type(shost) = FC_PORTTYPE_NPORT; +} +EXPORT_SYMBOL(fc_get_host_port_type); + +void fc_get_host_port_state(struct Scsi_Host *shost) +{ + struct fc_lport *lp = shost_priv(shost); + + if ((lp->link_status & FC_LINK_UP) == FC_LINK_UP) + fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; + else + fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE; +} +EXPORT_SYMBOL(fc_get_host_port_state); + +void fc_get_host_speed(struct Scsi_Host *shost) +{ + struct fc_lport *lport = shost_priv(shost); + + fc_host_speed(shost) = lport->link_speed; +} +EXPORT_SYMBOL(fc_get_host_speed); + +struct fc_host_statistics *fc_get_host_stats(struct Scsi_Host *shost) +{ + int i; + struct fc_host_statistics *fcoe_stats; + struct fc_lport *lp = shost_priv(shost); + struct timespec v0, v1; + + fcoe_stats = &lp->host_stats; + memset(fcoe_stats, 0, sizeof(struct fc_host_statistics)); + + jiffies_to_timespec(jiffies, &v0); + jiffies_to_timespec(lp->boot_time, &v1); + fcoe_stats->seconds_since_last_reset = (v0.tv_sec - v1.tv_sec); + + for_each_online_cpu(i) { + struct fcoe_dev_stats *stats = lp->dev_stats[i]; + if (stats == NULL) + continue; + fcoe_stats->tx_frames += stats->TxFrames; + fcoe_stats->tx_words += stats->TxWords; + fcoe_stats->rx_frames += stats->RxFrames; + fcoe_stats->rx_words += stats->RxWords; + fcoe_stats->error_frames += stats->ErrorFrames; + fcoe_stats->invalid_crc_count += stats->InvalidCRCCount; + fcoe_stats->fcp_input_requests += stats->InputRequests; + fcoe_stats->fcp_output_requests += stats->OutputRequests; + fcoe_stats->fcp_control_requests += stats->ControlRequests; + fcoe_stats->fcp_input_megabytes += stats->InputMegabytes; + fcoe_stats->fcp_output_megabytes += stats->OutputMegabytes; + fcoe_stats->link_failure_count += stats->LinkFailureCount; + } + fcoe_stats->lip_count = -1; + fcoe_stats->nos_count = -1; + fcoe_stats->loss_of_sync_count = -1; + fcoe_stats->loss_of_signal_count = -1; + fcoe_stats->prim_seq_protocol_err_count = -1; + fcoe_stats->dumped_frames = -1; + return fcoe_stats; +} +EXPORT_SYMBOL(fc_get_host_stats); + +/* + * Fill in FLOGI command for request. + */ +static void +fc_lport_flogi_fill(struct fc_lport *lport, struct fc_els_flogi *flogi, + unsigned int op) +{ + struct fc_els_csp *sp; + struct fc_els_cssp *cp; + + memset(flogi, 0, sizeof(*flogi)); + flogi->fl_cmd = (u8) op; + put_unaligned_be64(lport->wwpn, &flogi->fl_wwpn); + put_unaligned_be64(lport->wwnn, &flogi->fl_wwnn); + sp = &flogi->fl_csp; + sp->sp_hi_ver = 0x20; + sp->sp_lo_ver = 0x20; + sp->sp_bb_cred = htons(10); /* this gets set by gateway */ + sp->sp_bb_data = htons((u16) lport->mfs); + cp = &flogi->fl_cssp[3 - 1]; /* class 3 parameters */ + cp->cp_class = htons(FC_CPC_VALID | FC_CPC_SEQ); + if (op != ELS_FLOGI) { + sp->sp_features = htons(FC_SP_FT_CIRO); + sp->sp_tot_seq = htons(255); /* seq. we accept */ + sp->sp_rel_off = htons(0x1f); + sp->sp_e_d_tov = htonl(lport->e_d_tov); + + cp->cp_rdfs = htons((u16) lport->mfs); + cp->cp_con_seq = htons(255); + cp->cp_open_seq = 1; + } +} + +/* + * Add a supported FC-4 type. + */ +static void fc_lport_add_fc4_type(struct fc_lport *lport, enum fc_fh_type type) +{ + __be32 *mp; + + mp = &lport->fcts.ff_type_map[type / FC_NS_BPW]; + *mp = htonl(ntohl(*mp) | 1UL << (type % FC_NS_BPW)); +} + +/** + * fc_lport_recv_rlir_req - Handle received Registered Link Incident Report. + * @lport: Fibre Channel local port recieving the RLIR + * @sp: current sequence in the RLIR exchange + * @fp: RLIR request frame + * + * Locking Note: The lport lock is exected to be held before calling + * this function. + */ +static void fc_lport_recv_rlir_req(struct fc_seq *sp, struct fc_frame *fp, + struct fc_lport *lport) +{ + FC_DEBUG_LPORT("Received RLIR request while in state %s\n", + fc_lport_state(lport)); + + lport->tt.seq_els_rsp_send(sp, ELS_LS_ACC, NULL); + fc_frame_free(fp); +} + +/** + * fc_lport_recv_echo_req - Handle received ECHO request + * @lport: Fibre Channel local port recieving the ECHO + * @sp: current sequence in the ECHO exchange + * @fp: ECHO request frame + * + * Locking Note: The lport lock is exected to be held before calling + * this function. + */ +static void fc_lport_recv_echo_req(struct fc_seq *sp, struct fc_frame *in_fp, + struct fc_lport *lport) +{ + struct fc_frame *fp; + struct fc_exch *ep = fc_seq_exch(sp); + unsigned int len; + void *pp; + void *dp; + u32 f_ctl; + + FC_DEBUG_LPORT("Received RLIR request while in state %s\n", + fc_lport_state(lport)); + + len = fr_len(in_fp) - sizeof(struct fc_frame_header); + pp = fc_frame_payload_get(in_fp, len); + + if (len < sizeof(__be32)) + len = sizeof(__be32); + + fp = fc_frame_alloc(lport, len); + if (fp) { + dp = fc_frame_payload_get(fp, len); + memcpy(dp, pp, len); + *((u32 *)dp) = htonl(ELS_LS_ACC << 24); + sp = lport->tt.seq_start_next(sp); + f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ | FC_FC_END_SEQ; + fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, ep->did, ep->sid, + FC_TYPE_ELS, f_ctl, 0); + lport->tt.seq_send(lport, sp, fp); + } + fc_frame_free(in_fp); +} + +/** + * fc_lport_recv_echo_req - Handle received Request Node ID data request + * @lport: Fibre Channel local port recieving the RNID + * @sp: current sequence in the RNID exchange + * @fp: RNID request frame + * + * Locking Note: The lport lock is exected to be held before calling + * this function. + */ +static void fc_lport_recv_rnid_req(struct fc_seq *sp, struct fc_frame *in_fp, + struct fc_lport *lport) +{ + struct fc_frame *fp; + struct fc_exch *ep = fc_seq_exch(sp); + struct fc_els_rnid *req; + struct { + struct fc_els_rnid_resp rnid; + struct fc_els_rnid_cid cid; + struct fc_els_rnid_gen gen; + } *rp; + struct fc_seq_els_data rjt_data; + u8 fmt; + size_t len; + u32 f_ctl; + + FC_DEBUG_LPORT("Received RNID request while in state %s\n", + fc_lport_state(lport)); + + req = fc_frame_payload_get(in_fp, sizeof(*req)); + if (!req) { + rjt_data.fp = NULL; + rjt_data.reason = ELS_RJT_LOGIC; + rjt_data.explan = ELS_EXPL_NONE; + lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &rjt_data); + } else { + fmt = req->rnid_fmt; + len = sizeof(*rp); + if (fmt != ELS_RNIDF_GEN || + ntohl(lport->rnid_gen.rnid_atype) == 0) { + fmt = ELS_RNIDF_NONE; /* nothing to provide */ + len -= sizeof(rp->gen); + } + fp = fc_frame_alloc(lport, len); + if (fp) { + rp = fc_frame_payload_get(fp, len); + memset(rp, 0, len); + rp->rnid.rnid_cmd = ELS_LS_ACC; + rp->rnid.rnid_fmt = fmt; + rp->rnid.rnid_cid_len = sizeof(rp->cid); + rp->cid.rnid_wwpn = htonll(lport->wwpn); + rp->cid.rnid_wwnn = htonll(lport->wwnn); + if (fmt == ELS_RNIDF_GEN) { + rp->rnid.rnid_sid_len = sizeof(rp->gen); + memcpy(&rp->gen, &lport->rnid_gen, + sizeof(rp->gen)); + } + sp = lport->tt.seq_start_next(sp); + f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ; + f_ctl |= FC_FC_END_SEQ | FC_FC_SEQ_INIT; + fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, ep->did, ep->sid, + FC_TYPE_ELS, f_ctl, 0); + lport->tt.seq_send(lport, sp, fp); + } + } + fc_frame_free(in_fp); +} + +/** + * fc_lport_recv_adisc_req - Handle received Address Discovery Request + * @lport: Fibre Channel local port recieving the ADISC + * @sp: current sequence in the ADISC exchange + * @fp: ADISC request frame + * + * Locking Note: The lport lock is expected to be held before calling + * this function. + */ +static void fc_lport_recv_adisc_req(struct fc_seq *sp, struct fc_frame *in_fp, + struct fc_lport *lport) +{ + struct fc_frame *fp; + struct fc_exch *ep = fc_seq_exch(sp); + struct fc_els_adisc *req, *rp; + struct fc_seq_els_data rjt_data; + size_t len; + u32 f_ctl; + + FC_DEBUG_LPORT("Received ADISC request while in state %s\n", + fc_lport_state(lport)); + + req = fc_frame_payload_get(in_fp, sizeof(*req)); + if (!req) { + rjt_data.fp = NULL; + rjt_data.reason = ELS_RJT_LOGIC; + rjt_data.explan = ELS_EXPL_NONE; + lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &rjt_data); + } else { + len = sizeof(*rp); + fp = fc_frame_alloc(lport, len); + if (fp) { + rp = fc_frame_payload_get(fp, len); + memset(rp, 0, len); + rp->adisc_cmd = ELS_LS_ACC; + rp->adisc_wwpn = htonll(lport->wwpn); + rp->adisc_wwnn = htonll(lport->wwnn); + hton24(rp->adisc_port_id, + fc_host_port_id(lport->host)); + sp = lport->tt.seq_start_next(sp); + f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ; + f_ctl |= FC_FC_END_SEQ | FC_FC_SEQ_INIT; + fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, ep->did, ep->sid, + FC_TYPE_ELS, f_ctl, 0); + lport->tt.seq_send(lport, sp, fp); + } + } + fc_frame_free(in_fp); +} + +/** + * fc_lport_recv_logo_req - Handle received fabric LOGO request + * @lport: Fibre Channel local port recieving the LOGO + * @sp: current sequence in the LOGO exchange + * @fp: LOGO request frame + * + * Locking Note: The lport lock is exected to be held before calling + * this function. + */ +static void fc_lport_recv_logo_req(struct fc_seq *sp, struct fc_frame *fp, + struct fc_lport *lport) +{ + lport->tt.seq_els_rsp_send(sp, ELS_LS_ACC, NULL); + fc_lport_enter_reset(lport); + fc_frame_free(fp); +} + +/** + * fc_fabric_login - Start the lport state machine + * @lport: The lport that should log into the fabric + * + * Locking Note: This function should not be called + * with the lport lock held. + */ +int fc_fabric_login(struct fc_lport *lport) +{ + int rc = -1; + + mutex_lock(&lport->lp_mutex); + if (lport->state == LPORT_ST_NONE) { + fc_lport_enter_reset(lport); + rc = 0; + } + mutex_unlock(&lport->lp_mutex); + + return rc; +} +EXPORT_SYMBOL(fc_fabric_login); + +/** + * fc_linkup - Handler for transport linkup events + * @lport: The lport whose link is up + */ +void fc_linkup(struct fc_lport *lport) +{ + FC_DEBUG_LPORT("Link is up for port (%6x)\n", + fc_host_port_id(lport->host)); + + mutex_lock(&lport->lp_mutex); + if ((lport->link_status & FC_LINK_UP) != FC_LINK_UP) { + lport->link_status |= FC_LINK_UP; + + if (lport->state == LPORT_ST_RESET) + fc_lport_enter_flogi(lport); + } + mutex_unlock(&lport->lp_mutex); +} +EXPORT_SYMBOL(fc_linkup); + +/** + * fc_linkdown - Handler for transport linkdown events + * @lport: The lport whose link is down + */ +void fc_linkdown(struct fc_lport *lport) +{ + mutex_lock(&lport->lp_mutex); + FC_DEBUG_LPORT("Link is down for port (%6x)\n", + fc_host_port_id(lport->host)); + + if ((lport->link_status & FC_LINK_UP) == FC_LINK_UP) { + lport->link_status &= ~(FC_LINK_UP); + fc_lport_enter_reset(lport); + lport->tt.fcp_cleanup(lport); + } + mutex_unlock(&lport->lp_mutex); +} +EXPORT_SYMBOL(fc_linkdown); + +/** + * fc_pause - Pause the flow of frames + * @lport: The lport to be paused + */ +void fc_pause(struct fc_lport *lport) +{ + mutex_lock(&lport->lp_mutex); + lport->link_status |= FC_PAUSE; + mutex_unlock(&lport->lp_mutex); +} +EXPORT_SYMBOL(fc_pause); + +/** + * fc_unpause - Unpause the flow of frames + * @lport: The lport to be unpaused + */ +void fc_unpause(struct fc_lport *lport) +{ + mutex_lock(&lport->lp_mutex); + lport->link_status &= ~(FC_PAUSE); + mutex_unlock(&lport->lp_mutex); +} +EXPORT_SYMBOL(fc_unpause); + +/** + * fc_fabric_logoff - Logout of the fabric + * @lport: fc_lport pointer to logoff the fabric + * + * Return value: + * 0 for success, -1 for failure + **/ +int fc_fabric_logoff(struct fc_lport *lport) +{ + lport->tt.disc_stop_final(lport); + mutex_lock(&lport->lp_mutex); + fc_lport_enter_logo(lport); + mutex_unlock(&lport->lp_mutex); + return 0; +} +EXPORT_SYMBOL(fc_fabric_logoff); + +/** + * fc_lport_destroy - unregister a fc_lport + * @lport: fc_lport pointer to unregister + * + * Return value: + * None + * Note: + * exit routine for fc_lport instance + * clean-up all the allocated memory + * and free up other system resources. + * + **/ +int fc_lport_destroy(struct fc_lport *lport) +{ + lport->tt.frame_send = fc_frame_drop; + lport->tt.fcp_abort_io(lport); + lport->tt.exch_mgr_reset(lport->emp, 0, 0); + return 0; +} +EXPORT_SYMBOL(fc_lport_destroy); + +/** + * fc_set_mfs - sets up the mfs for the corresponding fc_lport + * @lport: fc_lport pointer to unregister + * @mfs: the new mfs for fc_lport + * + * Set mfs for the given fc_lport to the new mfs. + * + * Return: 0 for success + * + **/ +int fc_set_mfs(struct fc_lport *lport, u32 mfs) +{ + unsigned int old_mfs; + int rc = -EINVAL; + + mutex_lock(&lport->lp_mutex); + + old_mfs = lport->mfs; + + if (mfs >= FC_MIN_MAX_FRAME) { + mfs &= ~3; + if (mfs > FC_MAX_FRAME) + mfs = FC_MAX_FRAME; + mfs -= sizeof(struct fc_frame_header); + lport->mfs = mfs; + rc = 0; + } + + if (!rc && mfs < old_mfs) + fc_lport_enter_reset(lport); + + mutex_unlock(&lport->lp_mutex); + + return rc; +} +EXPORT_SYMBOL(fc_set_mfs); + +/** + * fc_lport_disc_callback - Callback for discovery events + * @lport: FC local port + * @event: The discovery event + */ +void fc_lport_disc_callback(struct fc_lport *lport, enum fc_disc_event event) +{ + switch (event) { + case DISC_EV_SUCCESS: + FC_DEBUG_LPORT("Got a SUCCESS event for port (%6x)\n", + fc_host_port_id(lport->host)); + break; + case DISC_EV_FAILED: + FC_DEBUG_LPORT("Got a FAILED event for port (%6x)\n", + fc_host_port_id(lport->host)); + mutex_lock(&lport->lp_mutex); + fc_lport_enter_reset(lport); + mutex_unlock(&lport->lp_mutex); + break; + case DISC_EV_NONE: + WARN_ON(1); + break; + } +} + +/** + * fc_rport_enter_ready - Enter the ready state and start discovery + * @lport: Fibre Channel local port that is ready + * + * Locking Note: The lport lock is expected to be held before calling + * this routine. + */ +static void fc_lport_enter_ready(struct fc_lport *lport) +{ + FC_DEBUG_LPORT("Port (%6x) entered Ready from state %s\n", + fc_host_port_id(lport->host), fc_lport_state(lport)); + + fc_lport_state_enter(lport, LPORT_ST_READY); + + lport->tt.disc_start(fc_lport_disc_callback, lport); +} + +/** + * fc_lport_recv_flogi_req - Receive a FLOGI request + * @sp_in: The sequence the FLOGI is on + * @rx_fp: The frame the FLOGI is in + * @lport: The lport that recieved the request + * + * A received FLOGI request indicates a point-to-point connection. + * Accept it with the common service parameters indicating our N port. + * Set up to do a PLOGI if we have the higher-number WWPN. + * + * Locking Note: The lport lock is exected to be held before calling + * this function. + */ +static void fc_lport_recv_flogi_req(struct fc_seq *sp_in, + struct fc_frame *rx_fp, + struct fc_lport *lport) +{ + struct fc_frame *fp; + struct fc_frame_header *fh; + struct fc_seq *sp; + struct fc_exch *ep; + struct fc_els_flogi *flp; + struct fc_els_flogi *new_flp; + u64 remote_wwpn; + u32 remote_fid; + u32 local_fid; + u32 f_ctl; + + FC_DEBUG_LPORT("Received FLOGI request while in state %s\n", + fc_lport_state(lport)); + + fh = fc_frame_header_get(rx_fp); + remote_fid = ntoh24(fh->fh_s_id); + flp = fc_frame_payload_get(rx_fp, sizeof(*flp)); + if (!flp) + goto out; + remote_wwpn = get_unaligned_be64(&flp->fl_wwpn); + if (remote_wwpn == lport->wwpn) { + FC_DBG("FLOGI from port with same WWPN %llx " + "possible configuration error\n", remote_wwpn); + goto out; + } + FC_DBG("FLOGI from port WWPN %llx\n", remote_wwpn); + + /* + * XXX what is the right thing to do for FIDs? + * The originator might expect our S_ID to be 0xfffffe. + * But if so, both of us could end up with the same FID. + */ + local_fid = FC_LOCAL_PTP_FID_LO; + if (remote_wwpn < lport->wwpn) { + local_fid = FC_LOCAL_PTP_FID_HI; + if (!remote_fid || remote_fid == local_fid) + remote_fid = FC_LOCAL_PTP_FID_LO; + } else if (!remote_fid) { + remote_fid = FC_LOCAL_PTP_FID_HI; + } + + fc_host_port_id(lport->host) = local_fid; + + fp = fc_frame_alloc(lport, sizeof(*flp)); + if (fp) { + sp = lport->tt.seq_start_next(fr_seq(rx_fp)); + new_flp = fc_frame_payload_get(fp, sizeof(*flp)); + fc_lport_flogi_fill(lport, new_flp, ELS_FLOGI); + new_flp->fl_cmd = (u8) ELS_LS_ACC; + + /* + * Send the response. If this fails, the originator should + * repeat the sequence. + */ + f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ | FC_FC_END_SEQ; + ep = fc_seq_exch(sp); + fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, ep->did, ep->sid, + FC_TYPE_ELS, f_ctl, 0); + lport->tt.seq_send(lport, sp, fp); + + } else { + fc_lport_error(lport, fp); + } + fc_lport_ptp_setup(lport, remote_fid, remote_wwpn, + get_unaligned_be64(&flp->fl_wwnn)); + + lport->tt.disc_start(fc_lport_disc_callback, lport); + +out: + sp = fr_seq(rx_fp); + fc_frame_free(rx_fp); +} + +/** + * fc_lport_recv_req - The generic lport request handler + * @lport: The lport that received the request + * @sp: The sequence the request is on + * @fp: The frame the request is in + * + * This function will see if the lport handles the request or + * if an rport should handle the request. + * + * Locking Note: This function should not be called with the lport + * lock held becuase it will grab the lock. + */ +static void fc_lport_recv_req(struct fc_lport *lport, struct fc_seq *sp, + struct fc_frame *fp) +{ + struct fc_frame_header *fh = fc_frame_header_get(fp); + void (*recv) (struct fc_seq *, struct fc_frame *, struct fc_lport *); + struct fc_rport *rport; + u32 s_id; + u32 d_id; + struct fc_seq_els_data rjt_data; + + mutex_lock(&lport->lp_mutex); + + /* + * Handle special ELS cases like FLOGI, LOGO, and + * RSCN here. These don't require a session. + * Even if we had a session, it might not be ready. + */ + if (fh->fh_type == FC_TYPE_ELS && fh->fh_r_ctl == FC_RCTL_ELS_REQ) { + /* + * Check opcode. + */ + recv = NULL; + switch (fc_frame_payload_op(fp)) { + case ELS_FLOGI: + recv = fc_lport_recv_flogi_req; + break; + case ELS_LOGO: + fh = fc_frame_header_get(fp); + if (ntoh24(fh->fh_s_id) == FC_FID_FLOGI) + recv = fc_lport_recv_logo_req; + break; + case ELS_RSCN: + recv = lport->tt.disc_recv_req; + break; + case ELS_ECHO: + recv = fc_lport_recv_echo_req; + break; + case ELS_RLIR: + recv = fc_lport_recv_rlir_req; + break; + case ELS_RNID: + recv = fc_lport_recv_rnid_req; + break; + case ELS_ADISC: + recv = fc_lport_recv_adisc_req; + break; + } + + if (recv) + recv(sp, fp, lport); + else { + /* + * Find session. + * If this is a new incoming PLOGI, we won't find it. + */ + s_id = ntoh24(fh->fh_s_id); + d_id = ntoh24(fh->fh_d_id); + + rport = lport->tt.rport_lookup(lport, s_id); + if (rport) + lport->tt.rport_recv_req(sp, fp, rport); + else { + rjt_data.fp = NULL; + rjt_data.reason = ELS_RJT_UNAB; + rjt_data.explan = ELS_EXPL_NONE; + lport->tt.seq_els_rsp_send(sp, + ELS_LS_RJT, + &rjt_data); + fc_frame_free(fp); + } + } + } else { + FC_DBG("dropping invalid frame (eof %x)\n", fr_eof(fp)); + fc_frame_free(fp); + } + mutex_unlock(&lport->lp_mutex); + + /* + * The common exch_done for all request may not be good + * if any request requires longer hold on exhange. XXX + */ + lport->tt.exch_done(sp); +} + +/** + * fc_lport_reset - Reset an lport + * @lport: The lport which should be reset + * + * Locking Note: This functions should not be called with the + * lport lock held. + */ +int fc_lport_reset(struct fc_lport *lport) +{ + mutex_lock(&lport->lp_mutex); + fc_lport_enter_reset(lport); + mutex_unlock(&lport->lp_mutex); + return 0; +} +EXPORT_SYMBOL(fc_lport_reset); + +/** + * fc_rport_enter_reset - Reset the local port + * @lport: Fibre Channel local port to be reset + * + * Locking Note: The lport lock is expected to be held before calling + * this routine. + */ +static void fc_lport_enter_reset(struct fc_lport *lport) +{ + FC_DEBUG_LPORT("Port (%6x) entered RESET state from %s state\n", + fc_host_port_id(lport->host), fc_lport_state(lport)); + + fc_lport_state_enter(lport, LPORT_ST_RESET); + + if (lport->dns_rp) + lport->tt.rport_logoff(lport->dns_rp); + + if (lport->ptp_rp) { + lport->tt.rport_logoff(lport->ptp_rp); + lport->ptp_rp = NULL; + } + + lport->tt.disc_stop(lport); + + lport->tt.exch_mgr_reset(lport->emp, 0, 0); + fc_host_fabric_name(lport->host) = 0; + fc_host_port_id(lport->host) = 0; + + if ((lport->link_status & FC_LINK_UP) == FC_LINK_UP) + fc_lport_enter_flogi(lport); +} + +/** + * fc_lport_error - Handler for any errors + * @lport: The fc_lport object + * @fp: The frame pointer + * + * If the error was caused by a resource allocation failure + * then wait for half a second and retry, otherwise retry + * after the e_d_tov time. + */ +static void fc_lport_error(struct fc_lport *lport, struct fc_frame *fp) +{ + unsigned long delay = 0; + FC_DEBUG_LPORT("Error %ld in state %s, retries %d\n", + PTR_ERR(fp), fc_lport_state(lport), + lport->retry_count); + + if (!fp || PTR_ERR(fp) == -FC_EX_TIMEOUT) { + /* + * Memory allocation failure, or the exchange timed out. + * Retry after delay + */ + if (lport->retry_count < lport->max_retry_count) { + lport->retry_count++; + if (!fp) + delay = msecs_to_jiffies(500); + else + delay = msecs_to_jiffies(lport->e_d_tov); + + schedule_delayed_work(&lport->retry_work, delay); + } else { + switch (lport->state) { + case LPORT_ST_NONE: + case LPORT_ST_READY: + case LPORT_ST_RESET: + case LPORT_ST_RPN_ID: + case LPORT_ST_RFT_ID: + case LPORT_ST_SCR: + case LPORT_ST_DNS: + case LPORT_ST_FLOGI: + case LPORT_ST_LOGO: + fc_lport_enter_reset(lport); + break; + } + } + } +} + +/** + * fc_lport_rft_id_resp - Handle response to Register Fibre + * Channel Types by ID (RPN_ID) request + * @sp: current sequence in RPN_ID exchange + * @fp: response frame + * @lp_arg: Fibre Channel host port instance + * + * Locking Note: This function will be called without the lport lock + * held, but it will lock, call an _enter_* function or fc_lport_error + * and then unlock the lport. + */ +static void fc_lport_rft_id_resp(struct fc_seq *sp, struct fc_frame *fp, + void *lp_arg) +{ + struct fc_lport *lport = lp_arg; + struct fc_frame_header *fh; + struct fc_ct_hdr *ct; + + if (fp == ERR_PTR(-FC_EX_CLOSED)) + return; + + mutex_lock(&lport->lp_mutex); + + FC_DEBUG_LPORT("Received a RFT_ID response\n"); + + if (lport->state != LPORT_ST_RFT_ID) { + FC_DBG("Received a RFT_ID response, but in state %s\n", + fc_lport_state(lport)); + goto out; + } + + if (IS_ERR(fp)) { + fc_lport_error(lport, fp); + goto err; + } + + fh = fc_frame_header_get(fp); + ct = fc_frame_payload_get(fp, sizeof(*ct)); + + if (fh && ct && fh->fh_type == FC_TYPE_CT && + ct->ct_fs_type == FC_FST_DIR && + ct->ct_fs_subtype == FC_NS_SUBTYPE && + ntohs(ct->ct_cmd) == FC_FS_ACC) + fc_lport_enter_scr(lport); + else + fc_lport_error(lport, fp); +out: + fc_frame_free(fp); +err: + mutex_unlock(&lport->lp_mutex); +} + +/** + * fc_lport_rpn_id_resp - Handle response to Register Port + * Name by ID (RPN_ID) request + * @sp: current sequence in RPN_ID exchange + * @fp: response frame + * @lp_arg: Fibre Channel host port instance + * + * Locking Note: This function will be called without the lport lock + * held, but it will lock, call an _enter_* function or fc_lport_error + * and then unlock the lport. + */ +static void fc_lport_rpn_id_resp(struct fc_seq *sp, struct fc_frame *fp, + void *lp_arg) +{ + struct fc_lport *lport = lp_arg; + struct fc_frame_header *fh; + struct fc_ct_hdr *ct; + + if (fp == ERR_PTR(-FC_EX_CLOSED)) + return; + + mutex_lock(&lport->lp_mutex); + + FC_DEBUG_LPORT("Received a RPN_ID response\n"); + + if (lport->state != LPORT_ST_RPN_ID) { + FC_DBG("Received a RPN_ID response, but in state %s\n", + fc_lport_state(lport)); + goto out; + } + + if (IS_ERR(fp)) { + fc_lport_error(lport, fp); + goto err; + } + + fh = fc_frame_header_get(fp); + ct = fc_frame_payload_get(fp, sizeof(*ct)); + if (fh && ct && fh->fh_type == FC_TYPE_CT && + ct->ct_fs_type == FC_FST_DIR && + ct->ct_fs_subtype == FC_NS_SUBTYPE && + ntohs(ct->ct_cmd) == FC_FS_ACC) + fc_lport_enter_rft_id(lport); + else + fc_lport_error(lport, fp); + +out: + fc_frame_free(fp); +err: + mutex_unlock(&lport->lp_mutex); +} + +/** + * fc_lport_scr_resp - Handle response to State Change Register (SCR) request + * @sp: current sequence in SCR exchange + * @fp: response frame + * @lp_arg: Fibre Channel lport port instance that sent the registration request + * + * Locking Note: This function will be called without the lport lock + * held, but it will lock, call an _enter_* function or fc_lport_error + * and then unlock the lport. + */ +static void fc_lport_scr_resp(struct fc_seq *sp, struct fc_frame *fp, + void *lp_arg) +{ + struct fc_lport *lport = lp_arg; + u8 op; + + if (fp == ERR_PTR(-FC_EX_CLOSED)) + return; + + mutex_lock(&lport->lp_mutex); + + FC_DEBUG_LPORT("Received a SCR response\n"); + + if (lport->state != LPORT_ST_SCR) { + FC_DBG("Received a SCR response, but in state %s\n", + fc_lport_state(lport)); + goto out; + } + + if (IS_ERR(fp)) { + fc_lport_error(lport, fp); + goto err; + } + + op = fc_frame_payload_op(fp); + if (op == ELS_LS_ACC) + fc_lport_enter_ready(lport); + else + fc_lport_error(lport, fp); + +out: + fc_frame_free(fp); +err: + mutex_unlock(&lport->lp_mutex); +} + +/** + * fc_lport_enter_scr - Send a State Change Register (SCR) request + * @lport: Fibre Channel local port to register for state changes + * + * Locking Note: The lport lock is expected to be held before calling + * this routine. + */ +static void fc_lport_enter_scr(struct fc_lport *lport) +{ + struct fc_frame *fp; + + FC_DEBUG_LPORT("Port (%6x) entered SCR state from %s state\n", + fc_host_port_id(lport->host), fc_lport_state(lport)); + + fc_lport_state_enter(lport, LPORT_ST_SCR); + + fp = fc_frame_alloc(lport, sizeof(struct fc_els_scr)); + if (!fp) { + fc_lport_error(lport, fp); + return; + } + + if (!lport->tt.elsct_send(lport, NULL, fp, ELS_SCR, + fc_lport_scr_resp, lport, lport->e_d_tov)) + fc_lport_error(lport, fp); +} + +/** + * fc_lport_enter_rft_id - Register FC4-types with the name server + * @lport: Fibre Channel local port to register + * + * Locking Note: The lport lock is expected to be held before calling + * this routine. + */ +static void fc_lport_enter_rft_id(struct fc_lport *lport) +{ + struct fc_frame *fp; + struct fc_ns_fts *lps; + int i; + + FC_DEBUG_LPORT("Port (%6x) entered RFT_ID state from %s state\n", + fc_host_port_id(lport->host), fc_lport_state(lport)); + + fc_lport_state_enter(lport, LPORT_ST_RFT_ID); + + lps = &lport->fcts; + i = sizeof(lps->ff_type_map) / sizeof(lps->ff_type_map[0]); + while (--i >= 0) + if (ntohl(lps->ff_type_map[i]) != 0) + break; + if (i < 0) { + /* nothing to register, move on to SCR */ + fc_lport_enter_scr(lport); + return; + } + + fp = fc_frame_alloc(lport, sizeof(struct fc_ct_hdr) + + sizeof(struct fc_ns_rft)); + if (!fp) { + fc_lport_error(lport, fp); + return; + } + + if (!lport->tt.elsct_send(lport, NULL, fp, FC_NS_RFT_ID, + fc_lport_rft_id_resp, + lport, lport->e_d_tov)) + fc_lport_error(lport, fp); +} + +/** + * fc_rport_enter_rft_id - Register port name with the name server + * @lport: Fibre Channel local port to register + * + * Locking Note: The lport lock is expected to be held before calling + * this routine. + */ +static void fc_lport_enter_rpn_id(struct fc_lport *lport) +{ + struct fc_frame *fp; + + FC_DEBUG_LPORT("Port (%6x) entered RPN_ID state from %s state\n", + fc_host_port_id(lport->host), fc_lport_state(lport)); + + fc_lport_state_enter(lport, LPORT_ST_RPN_ID); + + fp = fc_frame_alloc(lport, sizeof(struct fc_ct_hdr) + + sizeof(struct fc_ns_rn_id)); + if (!fp) { + fc_lport_error(lport, fp); + return; + } + + if (!lport->tt.elsct_send(lport, NULL, fp, FC_NS_RPN_ID, + fc_lport_rpn_id_resp, + lport, lport->e_d_tov)) + fc_lport_error(lport, fp); +} + +static struct fc_rport_operations fc_lport_rport_ops = { + .event_callback = fc_lport_rport_callback, +}; + +/** + * fc_rport_enter_dns - Create a rport to the name server + * @lport: Fibre Channel local port requesting a rport for the name server + * + * Locking Note: The lport lock is expected to be held before calling + * this routine. + */ +static void fc_lport_enter_dns(struct fc_lport *lport) +{ + struct fc_rport *rport; + struct fc_rport_libfc_priv *rdata; + struct fc_disc_port dp; + + dp.ids.port_id = FC_FID_DIR_SERV; + dp.ids.port_name = -1; + dp.ids.node_name = -1; + dp.ids.roles = FC_RPORT_ROLE_UNKNOWN; + dp.lp = lport; + + FC_DEBUG_LPORT("Port (%6x) entered DNS state from %s state\n", + fc_host_port_id(lport->host), fc_lport_state(lport)); + + fc_lport_state_enter(lport, LPORT_ST_DNS); + + rport = fc_rport_rogue_create(&dp); + if (!rport) + goto err; + + rdata = rport->dd_data; + rdata->ops = &fc_lport_rport_ops; + lport->tt.rport_login(rport); + return; + +err: + fc_lport_error(lport, NULL); +} + +/** + * fc_lport_timeout - Handler for the retry_work timer. + * @work: The work struct of the fc_lport + */ +static void fc_lport_timeout(struct work_struct *work) +{ + struct fc_lport *lport = + container_of(work, struct fc_lport, + retry_work.work); + + mutex_lock(&lport->lp_mutex); + + switch (lport->state) { + case LPORT_ST_NONE: + case LPORT_ST_READY: + case LPORT_ST_RESET: + WARN_ON(1); + break; + case LPORT_ST_FLOGI: + fc_lport_enter_flogi(lport); + break; + case LPORT_ST_DNS: + fc_lport_enter_dns(lport); + break; + case LPORT_ST_RPN_ID: + fc_lport_enter_rpn_id(lport); + break; + case LPORT_ST_RFT_ID: + fc_lport_enter_rft_id(lport); + break; + case LPORT_ST_SCR: + fc_lport_enter_scr(lport); + break; + case LPORT_ST_LOGO: + fc_lport_enter_logo(lport); + break; + } + + mutex_unlock(&lport->lp_mutex); +} + +/** + * fc_lport_logo_resp - Handle response to LOGO request + * @sp: current sequence in LOGO exchange + * @fp: response frame + * @lp_arg: Fibre Channel lport port instance that sent the LOGO request + * + * Locking Note: This function will be called without the lport lock + * held, but it will lock, call an _enter_* function or fc_lport_error + * and then unlock the lport. + */ +static void fc_lport_logo_resp(struct fc_seq *sp, struct fc_frame *fp, + void *lp_arg) +{ + struct fc_lport *lport = lp_arg; + u8 op; + + if (fp == ERR_PTR(-FC_EX_CLOSED)) + return; + + mutex_lock(&lport->lp_mutex); + + FC_DEBUG_LPORT("Received a LOGO response\n"); + + if (lport->state != LPORT_ST_LOGO) { + FC_DBG("Received a LOGO response, but in state %s\n", + fc_lport_state(lport)); + goto out; + } + + if (IS_ERR(fp)) { + fc_lport_error(lport, fp); + goto err; + } + + op = fc_frame_payload_op(fp); + if (op == ELS_LS_ACC) + fc_lport_enter_reset(lport); + else + fc_lport_error(lport, fp); + +out: + fc_frame_free(fp); +err: + mutex_unlock(&lport->lp_mutex); +} + +/** + * fc_rport_enter_logo - Logout of the fabric + * @lport: Fibre Channel local port to be logged out + * + * Locking Note: The lport lock is expected to be held before calling + * this routine. + */ +static void fc_lport_enter_logo(struct fc_lport *lport) +{ + struct fc_frame *fp; + struct fc_els_logo *logo; + + FC_DEBUG_LPORT("Port (%6x) entered LOGO state from %s state\n", + fc_host_port_id(lport->host), fc_lport_state(lport)); + + fc_lport_state_enter(lport, LPORT_ST_LOGO); + + /* DNS session should be closed so we can release it here */ + if (lport->dns_rp) + lport->tt.rport_logoff(lport->dns_rp); + + fp = fc_frame_alloc(lport, sizeof(*logo)); + if (!fp) { + fc_lport_error(lport, fp); + return; + } + + if (!lport->tt.elsct_send(lport, NULL, fp, ELS_LOGO, fc_lport_logo_resp, + lport, lport->e_d_tov)) + fc_lport_error(lport, fp); +} + +/** + * fc_lport_flogi_resp - Handle response to FLOGI request + * @sp: current sequence in FLOGI exchange + * @fp: response frame + * @lp_arg: Fibre Channel lport port instance that sent the FLOGI request + * + * Locking Note: This function will be called without the lport lock + * held, but it will lock, call an _enter_* function or fc_lport_error + * and then unlock the lport. + */ +static void fc_lport_flogi_resp(struct fc_seq *sp, struct fc_frame *fp, + void *lp_arg) +{ + struct fc_lport *lport = lp_arg; + struct fc_frame_header *fh; + struct fc_els_flogi *flp; + u32 did; + u16 csp_flags; + unsigned int r_a_tov; + unsigned int e_d_tov; + u16 mfs; + + if (fp == ERR_PTR(-FC_EX_CLOSED)) + return; + + mutex_lock(&lport->lp_mutex); + + FC_DEBUG_LPORT("Received a FLOGI response\n"); + + if (lport->state != LPORT_ST_FLOGI) { + FC_DBG("Received a FLOGI response, but in state %s\n", + fc_lport_state(lport)); + goto out; + } + + if (IS_ERR(fp)) { + fc_lport_error(lport, fp); + goto err; + } + + fh = fc_frame_header_get(fp); + did = ntoh24(fh->fh_d_id); + if (fc_frame_payload_op(fp) == ELS_LS_ACC && did != 0) { + + FC_DEBUG_LPORT("Assigned fid %x\n", did); + fc_host_port_id(lport->host) = did; + + flp = fc_frame_payload_get(fp, sizeof(*flp)); + if (flp) { + mfs = ntohs(flp->fl_csp.sp_bb_data) & + FC_SP_BB_DATA_MASK; + if (mfs >= FC_SP_MIN_MAX_PAYLOAD && + mfs < lport->mfs) + lport->mfs = mfs; + csp_flags = ntohs(flp->fl_csp.sp_features); + r_a_tov = ntohl(flp->fl_csp.sp_r_a_tov); + e_d_tov = ntohl(flp->fl_csp.sp_e_d_tov); + if (csp_flags & FC_SP_FT_EDTR) + e_d_tov /= 1000000; + if ((csp_flags & FC_SP_FT_FPORT) == 0) { + if (e_d_tov > lport->e_d_tov) + lport->e_d_tov = e_d_tov; + lport->r_a_tov = 2 * e_d_tov; + FC_DBG("Point-to-Point mode\n"); + fc_lport_ptp_setup(lport, ntoh24(fh->fh_s_id), + get_unaligned_be64( + &flp->fl_wwpn), + get_unaligned_be64( + &flp->fl_wwnn)); + } else { + lport->e_d_tov = e_d_tov; + lport->r_a_tov = r_a_tov; + fc_host_fabric_name(lport->host) = + get_unaligned_be64(&flp->fl_wwnn); + fc_lport_enter_dns(lport); + } + } + + if (flp) { + csp_flags = ntohs(flp->fl_csp.sp_features); + if ((csp_flags & FC_SP_FT_FPORT) == 0) { + lport->tt.disc_start(fc_lport_disc_callback, + lport); + } + } + } else { + FC_DBG("bad FLOGI response\n"); + } + +out: + fc_frame_free(fp); +err: + mutex_unlock(&lport->lp_mutex); +} + +/** + * fc_rport_enter_flogi - Send a FLOGI request to the fabric manager + * @lport: Fibre Channel local port to be logged in to the fabric + * + * Locking Note: The lport lock is expected to be held before calling + * this routine. + */ +void fc_lport_enter_flogi(struct fc_lport *lport) +{ + struct fc_frame *fp; + + FC_DEBUG_LPORT("Processing FLOGI state\n"); + + fc_lport_state_enter(lport, LPORT_ST_FLOGI); + + fp = fc_frame_alloc(lport, sizeof(struct fc_els_flogi)); + if (!fp) + return fc_lport_error(lport, fp); + + if (!lport->tt.elsct_send(lport, NULL, fp, ELS_FLOGI, + fc_lport_flogi_resp, lport, lport->e_d_tov)) + fc_lport_error(lport, fp); +} + +/* Configure a fc_lport */ +int fc_lport_config(struct fc_lport *lport) +{ + INIT_DELAYED_WORK(&lport->retry_work, fc_lport_timeout); + mutex_init(&lport->lp_mutex); + + fc_lport_state_enter(lport, LPORT_ST_NONE); + + fc_lport_add_fc4_type(lport, FC_TYPE_FCP); + fc_lport_add_fc4_type(lport, FC_TYPE_CT); + + return 0; +} +EXPORT_SYMBOL(fc_lport_config); + +int fc_lport_init(struct fc_lport *lport) +{ + if (!lport->tt.lport_recv) + lport->tt.lport_recv = fc_lport_recv_req; + + if (!lport->tt.lport_reset) + lport->tt.lport_reset = fc_lport_reset; + + fc_host_port_type(lport->host) = FC_PORTTYPE_NPORT; + fc_host_node_name(lport->host) = lport->wwnn; + fc_host_port_name(lport->host) = lport->wwpn; + fc_host_supported_classes(lport->host) = FC_COS_CLASS3; + memset(fc_host_supported_fc4s(lport->host), 0, + sizeof(fc_host_supported_fc4s(lport->host))); + fc_host_supported_fc4s(lport->host)[2] = 1; + fc_host_supported_fc4s(lport->host)[7] = 1; + + /* This value is also unchanging */ + memset(fc_host_active_fc4s(lport->host), 0, + sizeof(fc_host_active_fc4s(lport->host))); + fc_host_active_fc4s(lport->host)[2] = 1; + fc_host_active_fc4s(lport->host)[7] = 1; + fc_host_maxframe_size(lport->host) = lport->mfs; + fc_host_supported_speeds(lport->host) = 0; + if (lport->link_supported_speeds & FC_PORTSPEED_1GBIT) + fc_host_supported_speeds(lport->host) |= FC_PORTSPEED_1GBIT; + if (lport->link_supported_speeds & FC_PORTSPEED_10GBIT) + fc_host_supported_speeds(lport->host) |= FC_PORTSPEED_10GBIT; + + return 0; +} +EXPORT_SYMBOL(fc_lport_init); |