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* Copyright(c) 2007 Intel Corporation. All rights reserved.
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
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* Maintained at www.Open-FCoE.org
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* These comments only apply to the 'port code' which consists of the lport,
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* disc and rport blocks.
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* The lport, disc and rport blocks all have mutexes that are used to protect
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* those objects. The main motivation for these locks is to prevent from
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* having an lport reset just before we send a frame. In that scenario the
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* lport's FID would get set to zero and then we'd send a frame with an
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* invalid SID. We also need to ensure that states don't change unexpectedly
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* while processing another state.
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* The following hierarchy defines the locking rules. A greater lock
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* may be held before acquiring a lesser lock, but a lesser lock should never
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* be held while attempting to acquire a greater lock. Here is the hierarchy-
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* lport > disc, lport > rport, disc > rport
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* The callbacks cause complications with this scheme. There is a callback
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* from the rport (to either lport or disc) and a callback from disc
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* As rports exit the rport state machine a callback is made to the owner of
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* the rport to notify success or failure. Since the callback is likely to
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* cause the lport or disc to grab its lock we cannot hold the rport lock
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* while making the callback. To ensure that the rport is not free'd while
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* processing the callback the rport callbacks are serialized through a
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* single-threaded workqueue. An rport would never be free'd while in a
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* callback handler because no other rport work in this queue can be executed
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* When discovery succeeds or fails a callback is made to the lport as
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* notification. Currently, successful discovery causes the lport to take no
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* action. A failure will cause the lport to reset. There is likely a circular
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* locking problem with this implementation.
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* The critical sections protected by the lport's mutex are quite broad and
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* may be improved upon in the future. The lport code and its locking doesn't
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* influence the I/O path, so excessive locking doesn't penalize I/O
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* The strategy is to lock whenever processing a request or response. Note
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* that every _enter_* function corresponds to a state change. They generally
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* change the lports state and then send a request out on the wire. We lock
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* before calling any of these functions to protect that state change. This
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* means that the entry points into the lport block manage the locks while
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* the state machine can transition between states (i.e. _enter_* functions)
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* while always staying protected.
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* When handling responses we also hold the lport mutex broadly. When the
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* lport receives the response frame it locks the mutex and then calls the
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* appropriate handler for the particuar response. Generally a response will
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* trigger a state change and so the lock must already be held.
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* Retries also have to consider the locking. The retries occur from a work
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* context and the work function will lock the lport and then retry the state
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* (i.e. _enter_* function).
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#include <linux/timer.h>
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#include <linux/delay.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <asm/unaligned.h>
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#include <scsi/fc/fc_gs.h>
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#include <scsi/libfc.h>
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#include <scsi/fc_encode.h>
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#include <linux/scatterlist.h>
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#include "fc_libfc.h"
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/* Fabric IDs to use for point-to-point mode, chosen on whims. */
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#define FC_LOCAL_PTP_FID_LO 0x010101
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#define FC_LOCAL_PTP_FID_HI 0x010102
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#define DNS_DELAY 3 /* Discovery delay after RSCN (in seconds)*/
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static void fc_lport_error(struct fc_lport *, struct fc_frame *);
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static void fc_lport_enter_reset(struct fc_lport *);
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static void fc_lport_enter_flogi(struct fc_lport *);
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static void fc_lport_enter_dns(struct fc_lport *);
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static void fc_lport_enter_ns(struct fc_lport *, enum fc_lport_state);
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static void fc_lport_enter_scr(struct fc_lport *);
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static void fc_lport_enter_ready(struct fc_lport *);
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static void fc_lport_enter_logo(struct fc_lport *);
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static const char *fc_lport_state_names[] = {
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[LPORT_ST_DISABLED] = "disabled",
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[LPORT_ST_FLOGI] = "FLOGI",
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[LPORT_ST_DNS] = "dNS",
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[LPORT_ST_RNN_ID] = "RNN_ID",
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[LPORT_ST_RSNN_NN] = "RSNN_NN",
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[LPORT_ST_RSPN_ID] = "RSPN_ID",
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[LPORT_ST_RFT_ID] = "RFT_ID",
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[LPORT_ST_RFF_ID] = "RFF_ID",
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[LPORT_ST_SCR] = "SCR",
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[LPORT_ST_READY] = "Ready",
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[LPORT_ST_LOGO] = "LOGO",
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[LPORT_ST_RESET] = "reset",
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* struct fc_bsg_info - FC Passthrough managemet structure
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* @job: The passthrough job
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* @lport: The local port to pass through a command
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* @rsp_code: The expected response code
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* @sg: job->reply_payload.sg_list
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* @nents: job->reply_payload.sg_cnt
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* @offset: The offset into the response data
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struct fc_bsg_job *job;
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struct fc_lport *lport;
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struct scatterlist *sg;
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* fc_frame_drop() - Dummy frame handler
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* @lport: The local port the frame was received on
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* @fp: The received frame
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static int fc_frame_drop(struct fc_lport *lport, struct fc_frame *fp)
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* fc_lport_rport_callback() - Event handler for rport events
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* @lport: The lport which is receiving the event
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* @rdata: private remote port data
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* @event: The event that occurred
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* Locking Note: The rport lock should not be held when calling
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static void fc_lport_rport_callback(struct fc_lport *lport,
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struct fc_rport_priv *rdata,
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enum fc_rport_event event)
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FC_LPORT_DBG(lport, "Received a %d event for port (%6.6x)\n", event,
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mutex_lock(&lport->lp_mutex);
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if (lport->state == LPORT_ST_DNS) {
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lport->dns_rdata = rdata;
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fc_lport_enter_ns(lport, LPORT_ST_RNN_ID);
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FC_LPORT_DBG(lport, "Received an READY event "
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"on port (%6.6x) for the directory "
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"server, but the lport is not "
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"in the DNS state, it's in the "
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"%d state", rdata->ids.port_id,
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lport->tt.rport_logoff(rdata);
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case RPORT_EV_FAILED:
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lport->dns_rdata = NULL;
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mutex_unlock(&lport->lp_mutex);
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* fc_lport_state() - Return a string which represents the lport's state
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* @lport: The lport whose state is to converted to a string
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static const char *fc_lport_state(struct fc_lport *lport)
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cp = fc_lport_state_names[lport->state];
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* fc_lport_ptp_setup() - Create an rport for point-to-point mode
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* @lport: The lport to attach the ptp rport to
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* @remote_fid: The FID of the ptp rport
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* @remote_wwpn: The WWPN of the ptp rport
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* @remote_wwnn: The WWNN of the ptp rport
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static void fc_lport_ptp_setup(struct fc_lport *lport,
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u32 remote_fid, u64 remote_wwpn,
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mutex_lock(&lport->disc.disc_mutex);
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if (lport->ptp_rdata) {
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lport->tt.rport_logoff(lport->ptp_rdata);
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kref_put(&lport->ptp_rdata->kref, lport->tt.rport_destroy);
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lport->ptp_rdata = lport->tt.rport_create(lport, remote_fid);
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kref_get(&lport->ptp_rdata->kref);
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lport->ptp_rdata->ids.port_name = remote_wwpn;
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lport->ptp_rdata->ids.node_name = remote_wwnn;
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mutex_unlock(&lport->disc.disc_mutex);
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lport->tt.rport_login(lport->ptp_rdata);
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fc_lport_enter_ready(lport);
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* fc_get_host_port_state() - Return the port state of the given Scsi_Host
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* @shost: The SCSI host whose port state is to be determined
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void fc_get_host_port_state(struct Scsi_Host *shost)
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struct fc_lport *lport = shost_priv(shost);
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mutex_lock(&lport->lp_mutex);
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fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN;
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switch (lport->state) {
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fc_host_port_state(shost) = FC_PORTSTATE_ONLINE;
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fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE;
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mutex_unlock(&lport->lp_mutex);
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EXPORT_SYMBOL(fc_get_host_port_state);
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* fc_get_host_speed() - Return the speed of the given Scsi_Host
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* @shost: The SCSI host whose port speed is to be determined
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void fc_get_host_speed(struct Scsi_Host *shost)
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struct fc_lport *lport = shost_priv(shost);
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fc_host_speed(shost) = lport->link_speed;
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EXPORT_SYMBOL(fc_get_host_speed);
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* fc_get_host_stats() - Return the Scsi_Host's statistics
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* @shost: The SCSI host whose statistics are to be returned
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struct fc_host_statistics *fc_get_host_stats(struct Scsi_Host *shost)
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struct fc_host_statistics *fcoe_stats;
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struct fc_lport *lport = shost_priv(shost);
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struct timespec v0, v1;
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u64 fcp_in_bytes = 0;
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u64 fcp_out_bytes = 0;
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fcoe_stats = &lport->host_stats;
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memset(fcoe_stats, 0, sizeof(struct fc_host_statistics));
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jiffies_to_timespec(jiffies, &v0);
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jiffies_to_timespec(lport->boot_time, &v1);
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fcoe_stats->seconds_since_last_reset = (v0.tv_sec - v1.tv_sec);
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for_each_possible_cpu(cpu) {
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struct fcoe_dev_stats *stats;
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stats = per_cpu_ptr(lport->dev_stats, cpu);
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fcoe_stats->tx_frames += stats->TxFrames;
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fcoe_stats->tx_words += stats->TxWords;
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fcoe_stats->rx_frames += stats->RxFrames;
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fcoe_stats->rx_words += stats->RxWords;
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fcoe_stats->error_frames += stats->ErrorFrames;
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fcoe_stats->invalid_crc_count += stats->InvalidCRCCount;
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fcoe_stats->fcp_input_requests += stats->InputRequests;
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fcoe_stats->fcp_output_requests += stats->OutputRequests;
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fcoe_stats->fcp_control_requests += stats->ControlRequests;
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fcp_in_bytes += stats->InputBytes;
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fcp_out_bytes += stats->OutputBytes;
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fcoe_stats->link_failure_count += stats->LinkFailureCount;
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fcoe_stats->fcp_input_megabytes = div_u64(fcp_in_bytes, 1000000);
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fcoe_stats->fcp_output_megabytes = div_u64(fcp_out_bytes, 1000000);
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fcoe_stats->lip_count = -1;
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fcoe_stats->nos_count = -1;
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fcoe_stats->loss_of_sync_count = -1;
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fcoe_stats->loss_of_signal_count = -1;
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fcoe_stats->prim_seq_protocol_err_count = -1;
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fcoe_stats->dumped_frames = -1;
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EXPORT_SYMBOL(fc_get_host_stats);
334
* fc_lport_flogi_fill() - Fill in FLOGI command for request
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* @lport: The local port the FLOGI is for
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* @flogi: The FLOGI command
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static void fc_lport_flogi_fill(struct fc_lport *lport,
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struct fc_els_flogi *flogi,
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struct fc_els_csp *sp;
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struct fc_els_cssp *cp;
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memset(flogi, 0, sizeof(*flogi));
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flogi->fl_cmd = (u8) op;
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put_unaligned_be64(lport->wwpn, &flogi->fl_wwpn);
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put_unaligned_be64(lport->wwnn, &flogi->fl_wwnn);
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sp->sp_hi_ver = 0x20;
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sp->sp_lo_ver = 0x20;
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sp->sp_bb_cred = htons(10); /* this gets set by gateway */
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sp->sp_bb_data = htons((u16) lport->mfs);
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cp = &flogi->fl_cssp[3 - 1]; /* class 3 parameters */
356
cp->cp_class = htons(FC_CPC_VALID | FC_CPC_SEQ);
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if (op != ELS_FLOGI) {
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sp->sp_features = htons(FC_SP_FT_CIRO);
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sp->sp_tot_seq = htons(255); /* seq. we accept */
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sp->sp_rel_off = htons(0x1f);
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sp->sp_e_d_tov = htonl(lport->e_d_tov);
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cp->cp_rdfs = htons((u16) lport->mfs);
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cp->cp_con_seq = htons(255);
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* fc_lport_add_fc4_type() - Add a supported FC-4 type to a local port
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* @lport: The local port to add a new FC-4 type to
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* @type: The new FC-4 type
374
static void fc_lport_add_fc4_type(struct fc_lport *lport, enum fc_fh_type type)
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mp = &lport->fcts.ff_type_map[type / FC_NS_BPW];
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*mp = htonl(ntohl(*mp) | 1UL << (type % FC_NS_BPW));
383
* fc_lport_recv_rlir_req() - Handle received Registered Link Incident Report.
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* @lport: Fibre Channel local port receiving the RLIR
385
* @fp: The RLIR request frame
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* Locking Note: The lport lock is expected to be held before calling
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static void fc_lport_recv_rlir_req(struct fc_lport *lport, struct fc_frame *fp)
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FC_LPORT_DBG(lport, "Received RLIR request while in state %s\n",
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fc_lport_state(lport));
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lport->tt.seq_els_rsp_send(fp, ELS_LS_ACC, NULL);
400
* fc_lport_recv_echo_req() - Handle received ECHO request
401
* @lport: The local port receiving the ECHO
402
* @fp: ECHO request frame
404
* Locking Note: The lport lock is expected to be held before calling
407
static void fc_lport_recv_echo_req(struct fc_lport *lport,
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struct fc_frame *in_fp)
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FC_LPORT_DBG(lport, "Received ECHO request while in state %s\n",
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fc_lport_state(lport));
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len = fr_len(in_fp) - sizeof(struct fc_frame_header);
419
pp = fc_frame_payload_get(in_fp, len);
421
if (len < sizeof(__be32))
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len = sizeof(__be32);
424
fp = fc_frame_alloc(lport, len);
426
dp = fc_frame_payload_get(fp, len);
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*((__be32 *)dp) = htonl(ELS_LS_ACC << 24);
429
fc_fill_reply_hdr(fp, in_fp, FC_RCTL_ELS_REP, 0);
430
lport->tt.frame_send(lport, fp);
432
fc_frame_free(in_fp);
436
* fc_lport_recv_rnid_req() - Handle received Request Node ID data request
437
* @lport: The local port receiving the RNID
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* @fp: The RNID request frame
440
* Locking Note: The lport lock is expected to be held before calling
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static void fc_lport_recv_rnid_req(struct fc_lport *lport,
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struct fc_frame *in_fp)
447
struct fc_els_rnid *req;
449
struct fc_els_rnid_resp rnid;
450
struct fc_els_rnid_cid cid;
451
struct fc_els_rnid_gen gen;
453
struct fc_seq_els_data rjt_data;
457
FC_LPORT_DBG(lport, "Received RNID request while in state %s\n",
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fc_lport_state(lport));
460
req = fc_frame_payload_get(in_fp, sizeof(*req));
462
rjt_data.reason = ELS_RJT_LOGIC;
463
rjt_data.explan = ELS_EXPL_NONE;
464
lport->tt.seq_els_rsp_send(in_fp, ELS_LS_RJT, &rjt_data);
468
if (fmt != ELS_RNIDF_GEN ||
469
ntohl(lport->rnid_gen.rnid_atype) == 0) {
470
fmt = ELS_RNIDF_NONE; /* nothing to provide */
471
len -= sizeof(rp->gen);
473
fp = fc_frame_alloc(lport, len);
475
rp = fc_frame_payload_get(fp, len);
477
rp->rnid.rnid_cmd = ELS_LS_ACC;
478
rp->rnid.rnid_fmt = fmt;
479
rp->rnid.rnid_cid_len = sizeof(rp->cid);
480
rp->cid.rnid_wwpn = htonll(lport->wwpn);
481
rp->cid.rnid_wwnn = htonll(lport->wwnn);
482
if (fmt == ELS_RNIDF_GEN) {
483
rp->rnid.rnid_sid_len = sizeof(rp->gen);
484
memcpy(&rp->gen, &lport->rnid_gen,
487
fc_fill_reply_hdr(fp, in_fp, FC_RCTL_ELS_REP, 0);
488
lport->tt.frame_send(lport, fp);
491
fc_frame_free(in_fp);
495
* fc_lport_recv_logo_req() - Handle received fabric LOGO request
496
* @lport: The local port receiving the LOGO
497
* @fp: The LOGO request frame
499
* Locking Note: The lport lock is exected to be held before calling
502
static void fc_lport_recv_logo_req(struct fc_lport *lport, struct fc_frame *fp)
504
lport->tt.seq_els_rsp_send(fp, ELS_LS_ACC, NULL);
505
fc_lport_enter_reset(lport);
510
* fc_fabric_login() - Start the lport state machine
511
* @lport: The local port that should log into the fabric
513
* Locking Note: This function should not be called
514
* with the lport lock held.
516
int fc_fabric_login(struct fc_lport *lport)
520
mutex_lock(&lport->lp_mutex);
521
if (lport->state == LPORT_ST_DISABLED ||
522
lport->state == LPORT_ST_LOGO) {
523
fc_lport_state_enter(lport, LPORT_ST_RESET);
524
fc_lport_enter_reset(lport);
527
mutex_unlock(&lport->lp_mutex);
531
EXPORT_SYMBOL(fc_fabric_login);
534
* __fc_linkup() - Handler for transport linkup events
535
* @lport: The lport whose link is up
537
* Locking: must be called with the lp_mutex held
539
void __fc_linkup(struct fc_lport *lport)
541
if (!lport->link_up) {
544
if (lport->state == LPORT_ST_RESET)
545
fc_lport_enter_flogi(lport);
550
* fc_linkup() - Handler for transport linkup events
551
* @lport: The local port whose link is up
553
void fc_linkup(struct fc_lport *lport)
555
printk(KERN_INFO "host%d: libfc: Link up on port (%6.6x)\n",
556
lport->host->host_no, lport->port_id);
558
mutex_lock(&lport->lp_mutex);
560
mutex_unlock(&lport->lp_mutex);
562
EXPORT_SYMBOL(fc_linkup);
565
* __fc_linkdown() - Handler for transport linkdown events
566
* @lport: The lport whose link is down
568
* Locking: must be called with the lp_mutex held
570
void __fc_linkdown(struct fc_lport *lport)
572
if (lport->link_up) {
574
fc_lport_enter_reset(lport);
575
lport->tt.fcp_cleanup(lport);
580
* fc_linkdown() - Handler for transport linkdown events
581
* @lport: The local port whose link is down
583
void fc_linkdown(struct fc_lport *lport)
585
printk(KERN_INFO "host%d: libfc: Link down on port (%6.6x)\n",
586
lport->host->host_no, lport->port_id);
588
mutex_lock(&lport->lp_mutex);
589
__fc_linkdown(lport);
590
mutex_unlock(&lport->lp_mutex);
592
EXPORT_SYMBOL(fc_linkdown);
595
* fc_fabric_logoff() - Logout of the fabric
596
* @lport: The local port to logoff the fabric
599
* 0 for success, -1 for failure
601
int fc_fabric_logoff(struct fc_lport *lport)
603
lport->tt.disc_stop_final(lport);
604
mutex_lock(&lport->lp_mutex);
605
if (lport->dns_rdata)
606
lport->tt.rport_logoff(lport->dns_rdata);
607
mutex_unlock(&lport->lp_mutex);
608
lport->tt.rport_flush_queue();
609
mutex_lock(&lport->lp_mutex);
610
fc_lport_enter_logo(lport);
611
mutex_unlock(&lport->lp_mutex);
612
cancel_delayed_work_sync(&lport->retry_work);
615
EXPORT_SYMBOL(fc_fabric_logoff);
618
* fc_lport_destroy() - Unregister a fc_lport
619
* @lport: The local port to unregister
622
* exit routine for fc_lport instance
623
* clean-up all the allocated memory
624
* and free up other system resources.
627
int fc_lport_destroy(struct fc_lport *lport)
629
mutex_lock(&lport->lp_mutex);
630
lport->state = LPORT_ST_DISABLED;
632
lport->tt.frame_send = fc_frame_drop;
633
mutex_unlock(&lport->lp_mutex);
635
lport->tt.fcp_abort_io(lport);
636
lport->tt.disc_stop_final(lport);
637
lport->tt.exch_mgr_reset(lport, 0, 0);
638
fc_fc4_del_lport(lport);
641
EXPORT_SYMBOL(fc_lport_destroy);
644
* fc_set_mfs() - Set the maximum frame size for a local port
645
* @lport: The local port to set the MFS for
648
int fc_set_mfs(struct fc_lport *lport, u32 mfs)
650
unsigned int old_mfs;
653
mutex_lock(&lport->lp_mutex);
655
old_mfs = lport->mfs;
657
if (mfs >= FC_MIN_MAX_FRAME) {
659
if (mfs > FC_MAX_FRAME)
661
mfs -= sizeof(struct fc_frame_header);
666
if (!rc && mfs < old_mfs)
667
fc_lport_enter_reset(lport);
669
mutex_unlock(&lport->lp_mutex);
673
EXPORT_SYMBOL(fc_set_mfs);
676
* fc_lport_disc_callback() - Callback for discovery events
677
* @lport: The local port receiving the event
678
* @event: The discovery event
680
void fc_lport_disc_callback(struct fc_lport *lport, enum fc_disc_event event)
683
case DISC_EV_SUCCESS:
684
FC_LPORT_DBG(lport, "Discovery succeeded\n");
687
printk(KERN_ERR "host%d: libfc: "
688
"Discovery failed for port (%6.6x)\n",
689
lport->host->host_no, lport->port_id);
690
mutex_lock(&lport->lp_mutex);
691
fc_lport_enter_reset(lport);
692
mutex_unlock(&lport->lp_mutex);
701
* fc_rport_enter_ready() - Enter the ready state and start discovery
702
* @lport: The local port that is ready
704
* Locking Note: The lport lock is expected to be held before calling
707
static void fc_lport_enter_ready(struct fc_lport *lport)
709
FC_LPORT_DBG(lport, "Entered READY from state %s\n",
710
fc_lport_state(lport));
712
fc_lport_state_enter(lport, LPORT_ST_READY);
714
fc_vport_set_state(lport->vport, FC_VPORT_ACTIVE);
715
fc_vports_linkchange(lport);
717
if (!lport->ptp_rdata)
718
lport->tt.disc_start(fc_lport_disc_callback, lport);
722
* fc_lport_set_port_id() - set the local port Port ID
723
* @lport: The local port which will have its Port ID set.
724
* @port_id: The new port ID.
725
* @fp: The frame containing the incoming request, or NULL.
727
* Locking Note: The lport lock is expected to be held before calling
730
static void fc_lport_set_port_id(struct fc_lport *lport, u32 port_id,
734
printk(KERN_INFO "host%d: Assigned Port ID %6.6x\n",
735
lport->host->host_no, port_id);
737
lport->port_id = port_id;
739
/* Update the fc_host */
740
fc_host_port_id(lport->host) = port_id;
742
if (lport->tt.lport_set_port_id)
743
lport->tt.lport_set_port_id(lport, port_id, fp);
747
* fc_lport_set_port_id() - set the local port Port ID for point-to-multipoint
748
* @lport: The local port which will have its Port ID set.
749
* @port_id: The new port ID.
751
* Called by the lower-level driver when transport sets the local port_id.
752
* This is used in VN_port to VN_port mode for FCoE, and causes FLOGI and
753
* discovery to be skipped.
755
void fc_lport_set_local_id(struct fc_lport *lport, u32 port_id)
757
mutex_lock(&lport->lp_mutex);
759
fc_lport_set_port_id(lport, port_id, NULL);
761
switch (lport->state) {
765
fc_lport_enter_ready(lport);
770
mutex_unlock(&lport->lp_mutex);
772
EXPORT_SYMBOL(fc_lport_set_local_id);
775
* fc_lport_recv_flogi_req() - Receive a FLOGI request
776
* @lport: The local port that received the request
777
* @rx_fp: The FLOGI frame
779
* A received FLOGI request indicates a point-to-point connection.
780
* Accept it with the common service parameters indicating our N port.
781
* Set up to do a PLOGI if we have the higher-number WWPN.
783
* Locking Note: The lport lock is expected to be held before calling
786
static void fc_lport_recv_flogi_req(struct fc_lport *lport,
787
struct fc_frame *rx_fp)
790
struct fc_frame_header *fh;
791
struct fc_els_flogi *flp;
792
struct fc_els_flogi *new_flp;
797
FC_LPORT_DBG(lport, "Received FLOGI request while in state %s\n",
798
fc_lport_state(lport));
800
remote_fid = fc_frame_sid(rx_fp);
801
flp = fc_frame_payload_get(rx_fp, sizeof(*flp));
804
remote_wwpn = get_unaligned_be64(&flp->fl_wwpn);
805
if (remote_wwpn == lport->wwpn) {
806
printk(KERN_WARNING "host%d: libfc: Received FLOGI from port "
807
"with same WWPN %16.16llx\n",
808
lport->host->host_no, remote_wwpn);
811
FC_LPORT_DBG(lport, "FLOGI from port WWPN %16.16llx\n", remote_wwpn);
814
* XXX what is the right thing to do for FIDs?
815
* The originator might expect our S_ID to be 0xfffffe.
816
* But if so, both of us could end up with the same FID.
818
local_fid = FC_LOCAL_PTP_FID_LO;
819
if (remote_wwpn < lport->wwpn) {
820
local_fid = FC_LOCAL_PTP_FID_HI;
821
if (!remote_fid || remote_fid == local_fid)
822
remote_fid = FC_LOCAL_PTP_FID_LO;
823
} else if (!remote_fid) {
824
remote_fid = FC_LOCAL_PTP_FID_HI;
827
fc_lport_set_port_id(lport, local_fid, rx_fp);
829
fp = fc_frame_alloc(lport, sizeof(*flp));
831
new_flp = fc_frame_payload_get(fp, sizeof(*flp));
832
fc_lport_flogi_fill(lport, new_flp, ELS_FLOGI);
833
new_flp->fl_cmd = (u8) ELS_LS_ACC;
836
* Send the response. If this fails, the originator should
837
* repeat the sequence.
839
fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_ELS_REP, 0);
840
fh = fc_frame_header_get(fp);
841
hton24(fh->fh_s_id, local_fid);
842
hton24(fh->fh_d_id, remote_fid);
843
lport->tt.frame_send(lport, fp);
846
fc_lport_error(lport, fp);
848
fc_lport_ptp_setup(lport, remote_fid, remote_wwpn,
849
get_unaligned_be64(&flp->fl_wwnn));
851
fc_frame_free(rx_fp);
855
* fc_lport_recv_els_req() - The generic lport ELS request handler
856
* @lport: The local port that received the request
857
* @fp: The request frame
859
* This function will see if the lport handles the request or
860
* if an rport should handle the request.
862
* Locking Note: This function should not be called with the lport
863
* lock held because it will grab the lock.
865
static void fc_lport_recv_els_req(struct fc_lport *lport,
868
void (*recv)(struct fc_lport *, struct fc_frame *);
870
mutex_lock(&lport->lp_mutex);
873
* Handle special ELS cases like FLOGI, LOGO, and
874
* RSCN here. These don't require a session.
875
* Even if we had a session, it might not be ready.
883
recv = lport->tt.rport_recv_req;
884
switch (fc_frame_payload_op(fp)) {
886
if (!lport->point_to_multipoint)
887
recv = fc_lport_recv_flogi_req;
890
if (fc_frame_sid(fp) == FC_FID_FLOGI)
891
recv = fc_lport_recv_logo_req;
894
recv = lport->tt.disc_recv_req;
897
recv = fc_lport_recv_echo_req;
900
recv = fc_lport_recv_rlir_req;
903
recv = fc_lport_recv_rnid_req;
909
mutex_unlock(&lport->lp_mutex);
912
static int fc_lport_els_prli(struct fc_rport_priv *rdata, u32 spp_len,
913
const struct fc_els_spp *spp_in,
914
struct fc_els_spp *spp_out)
916
return FC_SPP_RESP_INVL;
919
struct fc4_prov fc_lport_els_prov = {
920
.prli = fc_lport_els_prli,
921
.recv = fc_lport_recv_els_req,
925
* fc_lport_recv_req() - The generic lport request handler
926
* @lport: The lport that received the request
927
* @fp: The frame the request is in
929
* Locking Note: This function should not be called with the lport
930
* lock held because it may grab the lock.
932
static void fc_lport_recv_req(struct fc_lport *lport,
935
struct fc_frame_header *fh = fc_frame_header_get(fp);
936
struct fc_seq *sp = fr_seq(fp);
937
struct fc4_prov *prov;
940
* Use RCU read lock and module_lock to be sure module doesn't
941
* deregister and get unloaded while we're calling it.
942
* try_module_get() is inlined and accepts a NULL parameter.
943
* Only ELSes and FCP target ops should come through here.
944
* The locking is unfortunate, and a better scheme is being sought.
948
if (fh->fh_type >= FC_FC4_PROV_SIZE)
950
prov = rcu_dereference(fc_passive_prov[fh->fh_type]);
951
if (!prov || !try_module_get(prov->module))
954
prov->recv(lport, fp);
955
module_put(prov->module);
959
FC_LPORT_DBG(lport, "dropping unexpected frame type %x\n", fh->fh_type);
961
lport->tt.exch_done(sp);
965
* fc_lport_reset() - Reset a local port
966
* @lport: The local port which should be reset
968
* Locking Note: This functions should not be called with the
971
int fc_lport_reset(struct fc_lport *lport)
973
cancel_delayed_work_sync(&lport->retry_work);
974
mutex_lock(&lport->lp_mutex);
975
fc_lport_enter_reset(lport);
976
mutex_unlock(&lport->lp_mutex);
979
EXPORT_SYMBOL(fc_lport_reset);
982
* fc_lport_reset_locked() - Reset the local port w/ the lport lock held
983
* @lport: The local port to be reset
985
* Locking Note: The lport lock is expected to be held before calling
988
static void fc_lport_reset_locked(struct fc_lport *lport)
990
if (lport->dns_rdata)
991
lport->tt.rport_logoff(lport->dns_rdata);
993
if (lport->ptp_rdata) {
994
lport->tt.rport_logoff(lport->ptp_rdata);
995
kref_put(&lport->ptp_rdata->kref, lport->tt.rport_destroy);
996
lport->ptp_rdata = NULL;
999
lport->tt.disc_stop(lport);
1001
lport->tt.exch_mgr_reset(lport, 0, 0);
1002
fc_host_fabric_name(lport->host) = 0;
1004
if (lport->port_id && (!lport->point_to_multipoint || !lport->link_up))
1005
fc_lport_set_port_id(lport, 0, NULL);
1009
* fc_lport_enter_reset() - Reset the local port
1010
* @lport: The local port to be reset
1012
* Locking Note: The lport lock is expected to be held before calling
1015
static void fc_lport_enter_reset(struct fc_lport *lport)
1017
FC_LPORT_DBG(lport, "Entered RESET state from %s state\n",
1018
fc_lport_state(lport));
1020
if (lport->state == LPORT_ST_DISABLED || lport->state == LPORT_ST_LOGO)
1025
fc_vport_set_state(lport->vport, FC_VPORT_INITIALIZING);
1027
fc_vport_set_state(lport->vport, FC_VPORT_LINKDOWN);
1029
fc_lport_state_enter(lport, LPORT_ST_RESET);
1030
fc_host_post_event(lport->host, fc_get_event_number(),
1031
FCH_EVT_LIPRESET, 0);
1032
fc_vports_linkchange(lport);
1033
fc_lport_reset_locked(lport);
1035
fc_lport_enter_flogi(lport);
1039
* fc_lport_enter_disabled() - Disable the local port
1040
* @lport: The local port to be reset
1042
* Locking Note: The lport lock is expected to be held before calling
1045
static void fc_lport_enter_disabled(struct fc_lport *lport)
1047
FC_LPORT_DBG(lport, "Entered disabled state from %s state\n",
1048
fc_lport_state(lport));
1050
fc_lport_state_enter(lport, LPORT_ST_DISABLED);
1051
fc_vports_linkchange(lport);
1052
fc_lport_reset_locked(lport);
1056
* fc_lport_error() - Handler for any errors
1057
* @lport: The local port that the error was on
1058
* @fp: The error code encoded in a frame pointer
1060
* If the error was caused by a resource allocation failure
1061
* then wait for half a second and retry, otherwise retry
1062
* after the e_d_tov time.
1064
static void fc_lport_error(struct fc_lport *lport, struct fc_frame *fp)
1066
unsigned long delay = 0;
1067
FC_LPORT_DBG(lport, "Error %ld in state %s, retries %d\n",
1068
PTR_ERR(fp), fc_lport_state(lport),
1069
lport->retry_count);
1071
if (PTR_ERR(fp) == -FC_EX_CLOSED)
1075
* Memory allocation failure, or the exchange timed out
1076
* or we received LS_RJT.
1079
if (lport->retry_count < lport->max_retry_count) {
1080
lport->retry_count++;
1082
delay = msecs_to_jiffies(500);
1084
delay = msecs_to_jiffies(lport->e_d_tov);
1086
schedule_delayed_work(&lport->retry_work, delay);
1088
fc_lport_enter_reset(lport);
1092
* fc_lport_ns_resp() - Handle response to a name server
1093
* registration exchange
1094
* @sp: current sequence in exchange
1095
* @fp: response frame
1096
* @lp_arg: Fibre Channel host port instance
1098
* Locking Note: This function will be called without the lport lock
1099
* held, but it will lock, call an _enter_* function or fc_lport_error()
1100
* and then unlock the lport.
1102
static void fc_lport_ns_resp(struct fc_seq *sp, struct fc_frame *fp,
1105
struct fc_lport *lport = lp_arg;
1106
struct fc_frame_header *fh;
1107
struct fc_ct_hdr *ct;
1109
FC_LPORT_DBG(lport, "Received a ns %s\n", fc_els_resp_type(fp));
1111
if (fp == ERR_PTR(-FC_EX_CLOSED))
1114
mutex_lock(&lport->lp_mutex);
1116
if (lport->state < LPORT_ST_RNN_ID || lport->state > LPORT_ST_RFF_ID) {
1117
FC_LPORT_DBG(lport, "Received a name server response, "
1118
"but in state %s\n", fc_lport_state(lport));
1125
fc_lport_error(lport, fp);
1129
fh = fc_frame_header_get(fp);
1130
ct = fc_frame_payload_get(fp, sizeof(*ct));
1132
if (fh && ct && fh->fh_type == FC_TYPE_CT &&
1133
ct->ct_fs_type == FC_FST_DIR &&
1134
ct->ct_fs_subtype == FC_NS_SUBTYPE &&
1135
ntohs(ct->ct_cmd) == FC_FS_ACC)
1136
switch (lport->state) {
1137
case LPORT_ST_RNN_ID:
1138
fc_lport_enter_ns(lport, LPORT_ST_RSNN_NN);
1140
case LPORT_ST_RSNN_NN:
1141
fc_lport_enter_ns(lport, LPORT_ST_RSPN_ID);
1143
case LPORT_ST_RSPN_ID:
1144
fc_lport_enter_ns(lport, LPORT_ST_RFT_ID);
1146
case LPORT_ST_RFT_ID:
1147
fc_lport_enter_ns(lport, LPORT_ST_RFF_ID);
1149
case LPORT_ST_RFF_ID:
1150
fc_lport_enter_scr(lport);
1153
/* should have already been caught by state checks */
1157
fc_lport_error(lport, fp);
1161
mutex_unlock(&lport->lp_mutex);
1165
* fc_lport_scr_resp() - Handle response to State Change Register (SCR) request
1166
* @sp: current sequence in SCR exchange
1167
* @fp: response frame
1168
* @lp_arg: Fibre Channel lport port instance that sent the registration request
1170
* Locking Note: This function will be called without the lport lock
1171
* held, but it will lock, call an _enter_* function or fc_lport_error
1172
* and then unlock the lport.
1174
static void fc_lport_scr_resp(struct fc_seq *sp, struct fc_frame *fp,
1177
struct fc_lport *lport = lp_arg;
1180
FC_LPORT_DBG(lport, "Received a SCR %s\n", fc_els_resp_type(fp));
1182
if (fp == ERR_PTR(-FC_EX_CLOSED))
1185
mutex_lock(&lport->lp_mutex);
1187
if (lport->state != LPORT_ST_SCR) {
1188
FC_LPORT_DBG(lport, "Received a SCR response, but in state "
1189
"%s\n", fc_lport_state(lport));
1196
fc_lport_error(lport, fp);
1200
op = fc_frame_payload_op(fp);
1201
if (op == ELS_LS_ACC)
1202
fc_lport_enter_ready(lport);
1204
fc_lport_error(lport, fp);
1209
mutex_unlock(&lport->lp_mutex);
1213
* fc_lport_enter_scr() - Send a SCR (State Change Register) request
1214
* @lport: The local port to register for state changes
1216
* Locking Note: The lport lock is expected to be held before calling
1219
static void fc_lport_enter_scr(struct fc_lport *lport)
1221
struct fc_frame *fp;
1223
FC_LPORT_DBG(lport, "Entered SCR state from %s state\n",
1224
fc_lport_state(lport));
1226
fc_lport_state_enter(lport, LPORT_ST_SCR);
1228
fp = fc_frame_alloc(lport, sizeof(struct fc_els_scr));
1230
fc_lport_error(lport, fp);
1234
if (!lport->tt.elsct_send(lport, FC_FID_FCTRL, fp, ELS_SCR,
1235
fc_lport_scr_resp, lport,
1236
2 * lport->r_a_tov))
1237
fc_lport_error(lport, NULL);
1241
* fc_lport_enter_ns() - register some object with the name server
1242
* @lport: Fibre Channel local port to register
1244
* Locking Note: The lport lock is expected to be held before calling
1247
static void fc_lport_enter_ns(struct fc_lport *lport, enum fc_lport_state state)
1249
struct fc_frame *fp;
1251
int size = sizeof(struct fc_ct_hdr);
1254
FC_LPORT_DBG(lport, "Entered %s state from %s state\n",
1255
fc_lport_state_names[state],
1256
fc_lport_state(lport));
1258
fc_lport_state_enter(lport, state);
1261
case LPORT_ST_RNN_ID:
1263
size += sizeof(struct fc_ns_rn_id);
1265
case LPORT_ST_RSNN_NN:
1266
len = strnlen(fc_host_symbolic_name(lport->host), 255);
1267
/* if there is no symbolic name, skip to RFT_ID */
1269
return fc_lport_enter_ns(lport, LPORT_ST_RFT_ID);
1270
cmd = FC_NS_RSNN_NN;
1271
size += sizeof(struct fc_ns_rsnn) + len;
1273
case LPORT_ST_RSPN_ID:
1274
len = strnlen(fc_host_symbolic_name(lport->host), 255);
1275
/* if there is no symbolic name, skip to RFT_ID */
1277
return fc_lport_enter_ns(lport, LPORT_ST_RFT_ID);
1278
cmd = FC_NS_RSPN_ID;
1279
size += sizeof(struct fc_ns_rspn) + len;
1281
case LPORT_ST_RFT_ID:
1283
size += sizeof(struct fc_ns_rft);
1285
case LPORT_ST_RFF_ID:
1287
size += sizeof(struct fc_ns_rff_id);
1290
fc_lport_error(lport, NULL);
1294
fp = fc_frame_alloc(lport, size);
1296
fc_lport_error(lport, fp);
1300
if (!lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, cmd,
1302
lport, 3 * lport->r_a_tov))
1303
fc_lport_error(lport, fp);
1306
static struct fc_rport_operations fc_lport_rport_ops = {
1307
.event_callback = fc_lport_rport_callback,
1311
* fc_rport_enter_dns() - Create a fc_rport for the name server
1312
* @lport: The local port requesting a remote port for the name server
1314
* Locking Note: The lport lock is expected to be held before calling
1317
static void fc_lport_enter_dns(struct fc_lport *lport)
1319
struct fc_rport_priv *rdata;
1321
FC_LPORT_DBG(lport, "Entered DNS state from %s state\n",
1322
fc_lport_state(lport));
1324
fc_lport_state_enter(lport, LPORT_ST_DNS);
1326
mutex_lock(&lport->disc.disc_mutex);
1327
rdata = lport->tt.rport_create(lport, FC_FID_DIR_SERV);
1328
mutex_unlock(&lport->disc.disc_mutex);
1332
rdata->ops = &fc_lport_rport_ops;
1333
lport->tt.rport_login(rdata);
1337
fc_lport_error(lport, NULL);
1341
* fc_lport_timeout() - Handler for the retry_work timer
1342
* @work: The work struct of the local port
1344
static void fc_lport_timeout(struct work_struct *work)
1346
struct fc_lport *lport =
1347
container_of(work, struct fc_lport,
1350
mutex_lock(&lport->lp_mutex);
1352
switch (lport->state) {
1353
case LPORT_ST_DISABLED:
1356
case LPORT_ST_READY:
1358
case LPORT_ST_RESET:
1360
case LPORT_ST_FLOGI:
1361
fc_lport_enter_flogi(lport);
1364
fc_lport_enter_dns(lport);
1366
case LPORT_ST_RNN_ID:
1367
case LPORT_ST_RSNN_NN:
1368
case LPORT_ST_RSPN_ID:
1369
case LPORT_ST_RFT_ID:
1370
case LPORT_ST_RFF_ID:
1371
fc_lport_enter_ns(lport, lport->state);
1374
fc_lport_enter_scr(lport);
1377
fc_lport_enter_logo(lport);
1381
mutex_unlock(&lport->lp_mutex);
1385
* fc_lport_logo_resp() - Handle response to LOGO request
1386
* @sp: The sequence that the LOGO was on
1387
* @fp: The LOGO frame
1388
* @lp_arg: The lport port that received the LOGO request
1390
* Locking Note: This function will be called without the lport lock
1391
* held, but it will lock, call an _enter_* function or fc_lport_error()
1392
* and then unlock the lport.
1394
void fc_lport_logo_resp(struct fc_seq *sp, struct fc_frame *fp,
1397
struct fc_lport *lport = lp_arg;
1400
FC_LPORT_DBG(lport, "Received a LOGO %s\n", fc_els_resp_type(fp));
1402
if (fp == ERR_PTR(-FC_EX_CLOSED))
1405
mutex_lock(&lport->lp_mutex);
1407
if (lport->state != LPORT_ST_LOGO) {
1408
FC_LPORT_DBG(lport, "Received a LOGO response, but in state "
1409
"%s\n", fc_lport_state(lport));
1416
fc_lport_error(lport, fp);
1420
op = fc_frame_payload_op(fp);
1421
if (op == ELS_LS_ACC)
1422
fc_lport_enter_disabled(lport);
1424
fc_lport_error(lport, fp);
1429
mutex_unlock(&lport->lp_mutex);
1431
EXPORT_SYMBOL(fc_lport_logo_resp);
1434
* fc_rport_enter_logo() - Logout of the fabric
1435
* @lport: The local port to be logged out
1437
* Locking Note: The lport lock is expected to be held before calling
1440
static void fc_lport_enter_logo(struct fc_lport *lport)
1442
struct fc_frame *fp;
1443
struct fc_els_logo *logo;
1445
FC_LPORT_DBG(lport, "Entered LOGO state from %s state\n",
1446
fc_lport_state(lport));
1448
fc_lport_state_enter(lport, LPORT_ST_LOGO);
1449
fc_vports_linkchange(lport);
1451
fp = fc_frame_alloc(lport, sizeof(*logo));
1453
fc_lport_error(lport, fp);
1457
if (!lport->tt.elsct_send(lport, FC_FID_FLOGI, fp, ELS_LOGO,
1458
fc_lport_logo_resp, lport,
1459
2 * lport->r_a_tov))
1460
fc_lport_error(lport, NULL);
1464
* fc_lport_flogi_resp() - Handle response to FLOGI request
1465
* @sp: The sequence that the FLOGI was on
1466
* @fp: The FLOGI response frame
1467
* @lp_arg: The lport port that received the FLOGI response
1469
* Locking Note: This function will be called without the lport lock
1470
* held, but it will lock, call an _enter_* function or fc_lport_error()
1471
* and then unlock the lport.
1473
void fc_lport_flogi_resp(struct fc_seq *sp, struct fc_frame *fp,
1476
struct fc_lport *lport = lp_arg;
1477
struct fc_frame_header *fh;
1478
struct fc_els_flogi *flp;
1481
unsigned int r_a_tov;
1482
unsigned int e_d_tov;
1485
FC_LPORT_DBG(lport, "Received a FLOGI %s\n", fc_els_resp_type(fp));
1487
if (fp == ERR_PTR(-FC_EX_CLOSED))
1490
mutex_lock(&lport->lp_mutex);
1492
if (lport->state != LPORT_ST_FLOGI) {
1493
FC_LPORT_DBG(lport, "Received a FLOGI response, but in state "
1494
"%s\n", fc_lport_state(lport));
1501
fc_lport_error(lport, fp);
1505
fh = fc_frame_header_get(fp);
1506
did = fc_frame_did(fp);
1507
if (fh->fh_r_ctl != FC_RCTL_ELS_REP || did == 0 ||
1508
fc_frame_payload_op(fp) != ELS_LS_ACC) {
1509
FC_LPORT_DBG(lport, "FLOGI not accepted or bad response\n");
1510
fc_lport_error(lport, fp);
1514
flp = fc_frame_payload_get(fp, sizeof(*flp));
1516
FC_LPORT_DBG(lport, "FLOGI bad response\n");
1517
fc_lport_error(lport, fp);
1521
mfs = ntohs(flp->fl_csp.sp_bb_data) &
1523
if (mfs >= FC_SP_MIN_MAX_PAYLOAD &&
1526
csp_flags = ntohs(flp->fl_csp.sp_features);
1527
r_a_tov = ntohl(flp->fl_csp.sp_r_a_tov);
1528
e_d_tov = ntohl(flp->fl_csp.sp_e_d_tov);
1529
if (csp_flags & FC_SP_FT_EDTR)
1532
lport->npiv_enabled = !!(csp_flags & FC_SP_FT_NPIV_ACC);
1534
if ((csp_flags & FC_SP_FT_FPORT) == 0) {
1535
if (e_d_tov > lport->e_d_tov)
1536
lport->e_d_tov = e_d_tov;
1537
lport->r_a_tov = 2 * e_d_tov;
1538
fc_lport_set_port_id(lport, did, fp);
1539
printk(KERN_INFO "host%d: libfc: "
1540
"Port (%6.6x) entered "
1541
"point-to-point mode\n",
1542
lport->host->host_no, did);
1543
fc_lport_ptp_setup(lport, fc_frame_sid(fp),
1549
lport->e_d_tov = e_d_tov;
1550
lport->r_a_tov = r_a_tov;
1551
fc_host_fabric_name(lport->host) =
1552
get_unaligned_be64(&flp->fl_wwnn);
1553
fc_lport_set_port_id(lport, did, fp);
1554
fc_lport_enter_dns(lport);
1560
mutex_unlock(&lport->lp_mutex);
1562
EXPORT_SYMBOL(fc_lport_flogi_resp);
1565
* fc_rport_enter_flogi() - Send a FLOGI request to the fabric manager
1566
* @lport: Fibre Channel local port to be logged in to the fabric
1568
* Locking Note: The lport lock is expected to be held before calling
1571
void fc_lport_enter_flogi(struct fc_lport *lport)
1573
struct fc_frame *fp;
1575
FC_LPORT_DBG(lport, "Entered FLOGI state from %s state\n",
1576
fc_lport_state(lport));
1578
fc_lport_state_enter(lport, LPORT_ST_FLOGI);
1580
if (lport->point_to_multipoint) {
1582
fc_lport_enter_ready(lport);
1586
fp = fc_frame_alloc(lport, sizeof(struct fc_els_flogi));
1588
return fc_lport_error(lport, fp);
1590
if (!lport->tt.elsct_send(lport, FC_FID_FLOGI, fp,
1591
lport->vport ? ELS_FDISC : ELS_FLOGI,
1592
fc_lport_flogi_resp, lport,
1593
lport->vport ? 2 * lport->r_a_tov :
1595
fc_lport_error(lport, NULL);
1599
* fc_lport_config() - Configure a fc_lport
1600
* @lport: The local port to be configured
1602
int fc_lport_config(struct fc_lport *lport)
1604
INIT_DELAYED_WORK(&lport->retry_work, fc_lport_timeout);
1605
mutex_init(&lport->lp_mutex);
1607
fc_lport_state_enter(lport, LPORT_ST_DISABLED);
1609
fc_lport_add_fc4_type(lport, FC_TYPE_FCP);
1610
fc_lport_add_fc4_type(lport, FC_TYPE_CT);
1611
fc_fc4_conf_lport_params(lport, FC_TYPE_FCP);
1615
EXPORT_SYMBOL(fc_lport_config);
1618
* fc_lport_init() - Initialize the lport layer for a local port
1619
* @lport: The local port to initialize the exchange layer for
1621
int fc_lport_init(struct fc_lport *lport)
1623
if (!lport->tt.lport_recv)
1624
lport->tt.lport_recv = fc_lport_recv_req;
1626
if (!lport->tt.lport_reset)
1627
lport->tt.lport_reset = fc_lport_reset;
1629
fc_host_port_type(lport->host) = FC_PORTTYPE_NPORT;
1630
fc_host_node_name(lport->host) = lport->wwnn;
1631
fc_host_port_name(lport->host) = lport->wwpn;
1632
fc_host_supported_classes(lport->host) = FC_COS_CLASS3;
1633
memset(fc_host_supported_fc4s(lport->host), 0,
1634
sizeof(fc_host_supported_fc4s(lport->host)));
1635
fc_host_supported_fc4s(lport->host)[2] = 1;
1636
fc_host_supported_fc4s(lport->host)[7] = 1;
1638
/* This value is also unchanging */
1639
memset(fc_host_active_fc4s(lport->host), 0,
1640
sizeof(fc_host_active_fc4s(lport->host)));
1641
fc_host_active_fc4s(lport->host)[2] = 1;
1642
fc_host_active_fc4s(lport->host)[7] = 1;
1643
fc_host_maxframe_size(lport->host) = lport->mfs;
1644
fc_host_supported_speeds(lport->host) = 0;
1645
if (lport->link_supported_speeds & FC_PORTSPEED_1GBIT)
1646
fc_host_supported_speeds(lport->host) |= FC_PORTSPEED_1GBIT;
1647
if (lport->link_supported_speeds & FC_PORTSPEED_10GBIT)
1648
fc_host_supported_speeds(lport->host) |= FC_PORTSPEED_10GBIT;
1649
fc_fc4_add_lport(lport);
1653
EXPORT_SYMBOL(fc_lport_init);
1656
* fc_lport_bsg_resp() - The common response handler for FC Passthrough requests
1657
* @sp: The sequence for the FC Passthrough response
1658
* @fp: The response frame
1659
* @info_arg: The BSG info that the response is for
1661
static void fc_lport_bsg_resp(struct fc_seq *sp, struct fc_frame *fp,
1664
struct fc_bsg_info *info = info_arg;
1665
struct fc_bsg_job *job = info->job;
1666
struct fc_lport *lport = info->lport;
1667
struct fc_frame_header *fh;
1672
job->reply->result = (PTR_ERR(fp) == -FC_EX_CLOSED) ?
1673
-ECONNABORTED : -ETIMEDOUT;
1674
job->reply_len = sizeof(uint32_t);
1675
job->state_flags |= FC_RQST_STATE_DONE;
1681
mutex_lock(&lport->lp_mutex);
1682
fh = fc_frame_header_get(fp);
1683
len = fr_len(fp) - sizeof(*fh);
1684
buf = fc_frame_payload_get(fp, 0);
1686
if (fr_sof(fp) == FC_SOF_I3 && !ntohs(fh->fh_seq_cnt)) {
1687
/* Get the response code from the first frame payload */
1688
unsigned short cmd = (info->rsp_code == FC_FS_ACC) ?
1689
ntohs(((struct fc_ct_hdr *)buf)->ct_cmd) :
1690
(unsigned short)fc_frame_payload_op(fp);
1692
/* Save the reply status of the job */
1693
job->reply->reply_data.ctels_reply.status =
1694
(cmd == info->rsp_code) ?
1695
FC_CTELS_STATUS_OK : FC_CTELS_STATUS_REJECT;
1698
job->reply->reply_payload_rcv_len +=
1699
fc_copy_buffer_to_sglist(buf, len, info->sg, &info->nents,
1700
&info->offset, KM_BIO_SRC_IRQ, NULL);
1702
if (fr_eof(fp) == FC_EOF_T &&
1703
(ntoh24(fh->fh_f_ctl) & (FC_FC_LAST_SEQ | FC_FC_END_SEQ)) ==
1704
(FC_FC_LAST_SEQ | FC_FC_END_SEQ)) {
1705
if (job->reply->reply_payload_rcv_len >
1706
job->reply_payload.payload_len)
1707
job->reply->reply_payload_rcv_len =
1708
job->reply_payload.payload_len;
1709
job->reply->result = 0;
1710
job->state_flags |= FC_RQST_STATE_DONE;
1715
mutex_unlock(&lport->lp_mutex);
1719
* fc_lport_els_request() - Send ELS passthrough request
1720
* @job: The BSG Passthrough job
1721
* @lport: The local port sending the request
1722
* @did: The destination port id
1724
* Locking Note: The lport lock is expected to be held before calling
1727
static int fc_lport_els_request(struct fc_bsg_job *job,
1728
struct fc_lport *lport,
1731
struct fc_bsg_info *info;
1732
struct fc_frame *fp;
1733
struct fc_frame_header *fh;
1737
fp = fc_frame_alloc(lport, job->request_payload.payload_len);
1741
len = job->request_payload.payload_len;
1742
pp = fc_frame_payload_get(fp, len);
1744
sg_copy_to_buffer(job->request_payload.sg_list,
1745
job->request_payload.sg_cnt,
1748
fh = fc_frame_header_get(fp);
1749
fh->fh_r_ctl = FC_RCTL_ELS_REQ;
1750
hton24(fh->fh_d_id, did);
1751
hton24(fh->fh_s_id, lport->port_id);
1752
fh->fh_type = FC_TYPE_ELS;
1753
hton24(fh->fh_f_ctl, FC_FCTL_REQ);
1756
fh->fh_parm_offset = 0;
1758
info = kzalloc(sizeof(struct fc_bsg_info), GFP_KERNEL);
1765
info->lport = lport;
1766
info->rsp_code = ELS_LS_ACC;
1767
info->nents = job->reply_payload.sg_cnt;
1768
info->sg = job->reply_payload.sg_list;
1770
if (!lport->tt.exch_seq_send(lport, fp, fc_lport_bsg_resp,
1779
* fc_lport_ct_request() - Send CT Passthrough request
1780
* @job: The BSG Passthrough job
1781
* @lport: The local port sending the request
1782
* @did: The destination FC-ID
1783
* @tov: The timeout period to wait for the response
1785
* Locking Note: The lport lock is expected to be held before calling
1788
static int fc_lport_ct_request(struct fc_bsg_job *job,
1789
struct fc_lport *lport, u32 did, u32 tov)
1791
struct fc_bsg_info *info;
1792
struct fc_frame *fp;
1793
struct fc_frame_header *fh;
1794
struct fc_ct_req *ct;
1797
fp = fc_frame_alloc(lport, sizeof(struct fc_ct_hdr) +
1798
job->request_payload.payload_len);
1802
len = job->request_payload.payload_len;
1803
ct = fc_frame_payload_get(fp, len);
1805
sg_copy_to_buffer(job->request_payload.sg_list,
1806
job->request_payload.sg_cnt,
1809
fh = fc_frame_header_get(fp);
1810
fh->fh_r_ctl = FC_RCTL_DD_UNSOL_CTL;
1811
hton24(fh->fh_d_id, did);
1812
hton24(fh->fh_s_id, lport->port_id);
1813
fh->fh_type = FC_TYPE_CT;
1814
hton24(fh->fh_f_ctl, FC_FCTL_REQ);
1817
fh->fh_parm_offset = 0;
1819
info = kzalloc(sizeof(struct fc_bsg_info), GFP_KERNEL);
1826
info->lport = lport;
1827
info->rsp_code = FC_FS_ACC;
1828
info->nents = job->reply_payload.sg_cnt;
1829
info->sg = job->reply_payload.sg_list;
1831
if (!lport->tt.exch_seq_send(lport, fp, fc_lport_bsg_resp,
1840
* fc_lport_bsg_request() - The common entry point for sending
1841
* FC Passthrough requests
1842
* @job: The BSG passthrough job
1844
int fc_lport_bsg_request(struct fc_bsg_job *job)
1846
struct request *rsp = job->req->next_rq;
1847
struct Scsi_Host *shost = job->shost;
1848
struct fc_lport *lport = shost_priv(shost);
1849
struct fc_rport *rport;
1850
struct fc_rport_priv *rdata;
1854
job->reply->reply_payload_rcv_len = 0;
1856
rsp->resid_len = job->reply_payload.payload_len;
1858
mutex_lock(&lport->lp_mutex);
1860
switch (job->request->msgcode) {
1861
case FC_BSG_RPT_ELS:
1866
rdata = rport->dd_data;
1867
rc = fc_lport_els_request(job, lport, rport->port_id,
1876
rdata = rport->dd_data;
1877
rc = fc_lport_ct_request(job, lport, rport->port_id,
1882
did = ntoh24(job->request->rqst_data.h_ct.port_id);
1883
if (did == FC_FID_DIR_SERV)
1884
rdata = lport->dns_rdata;
1886
rdata = lport->tt.rport_lookup(lport, did);
1891
rc = fc_lport_ct_request(job, lport, did, rdata->e_d_tov);
1894
case FC_BSG_HST_ELS_NOLOGIN:
1895
did = ntoh24(job->request->rqst_data.h_els.port_id);
1896
rc = fc_lport_els_request(job, lport, did, lport->e_d_tov);
1900
mutex_unlock(&lport->lp_mutex);
1903
EXPORT_SYMBOL(fc_lport_bsg_request);