| /* |
| * Copyright(c) 2007 - 2008 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 |
| */ |
| |
| /* |
| * RPORT GENERAL INFO |
| * |
| * This file contains all processing regarding fc_rports. It contains the |
| * rport state machine and does all rport interaction with the transport class. |
| * There should be no other places in libfc that interact directly with the |
| * transport class in regards to adding and deleting rports. |
| * |
| * fc_rport's represent N_Port's within the fabric. |
| */ |
| |
| /* |
| * RPORT LOCKING |
| * |
| * The rport should never hold the rport mutex and then attempt to acquire |
| * either the lport or disc mutexes. The rport's mutex is considered lesser |
| * than both the lport's mutex and the disc mutex. Refer to fc_lport.c for |
| * more comments on the heirarchy. |
| * |
| * The locking strategy is similar to the lport's strategy. The lock protects |
| * the rport's states and is held and released by the entry points to the rport |
| * block. All _enter_* functions correspond to rport states and expect the rport |
| * mutex to be locked before calling them. This means that rports only handle |
| * one request or response at a time, since they're not critical for the I/O |
| * path this potential over-use of the mutex is acceptable. |
| */ |
| |
| #include <linux/kernel.h> |
| #include <linux/spinlock.h> |
| #include <linux/interrupt.h> |
| #include <linux/rcupdate.h> |
| #include <linux/timer.h> |
| #include <linux/workqueue.h> |
| #include <asm/unaligned.h> |
| |
| #include <scsi/libfc.h> |
| #include <scsi/fc_encode.h> |
| |
| static int fc_rport_debug; |
| |
| #define FC_DEBUG_RPORT(fmt...) \ |
| do { \ |
| if (fc_rport_debug) \ |
| FC_DBG(fmt); \ |
| } while (0) |
| |
| struct workqueue_struct *rport_event_queue; |
| |
| static void fc_rport_enter_plogi(struct fc_rport *); |
| static void fc_rport_enter_prli(struct fc_rport *); |
| static void fc_rport_enter_rtv(struct fc_rport *); |
| static void fc_rport_enter_ready(struct fc_rport *); |
| static void fc_rport_enter_logo(struct fc_rport *); |
| |
| static void fc_rport_recv_plogi_req(struct fc_rport *, |
| struct fc_seq *, struct fc_frame *); |
| static void fc_rport_recv_prli_req(struct fc_rport *, |
| struct fc_seq *, struct fc_frame *); |
| static void fc_rport_recv_prlo_req(struct fc_rport *, |
| struct fc_seq *, struct fc_frame *); |
| static void fc_rport_recv_logo_req(struct fc_rport *, |
| struct fc_seq *, struct fc_frame *); |
| static void fc_rport_timeout(struct work_struct *); |
| static void fc_rport_error(struct fc_rport *, struct fc_frame *); |
| static void fc_rport_error_retry(struct fc_rport *, struct fc_frame *); |
| static void fc_rport_work(struct work_struct *); |
| |
| static const char *fc_rport_state_names[] = { |
| [RPORT_ST_NONE] = "None", |
| [RPORT_ST_INIT] = "Init", |
| [RPORT_ST_PLOGI] = "PLOGI", |
| [RPORT_ST_PRLI] = "PRLI", |
| [RPORT_ST_RTV] = "RTV", |
| [RPORT_ST_READY] = "Ready", |
| [RPORT_ST_LOGO] = "LOGO", |
| }; |
| |
| static void fc_rport_rogue_destroy(struct device *dev) |
| { |
| struct fc_rport *rport = dev_to_rport(dev); |
| FC_DEBUG_RPORT("Destroying rogue rport (%6x)\n", rport->port_id); |
| kfree(rport); |
| } |
| |
| struct fc_rport *fc_rport_rogue_create(struct fc_disc_port *dp) |
| { |
| struct fc_rport *rport; |
| struct fc_rport_libfc_priv *rdata; |
| rport = kzalloc(sizeof(*rport) + sizeof(*rdata), GFP_KERNEL); |
| |
| if (!rport) |
| return NULL; |
| |
| rdata = RPORT_TO_PRIV(rport); |
| |
| rport->dd_data = rdata; |
| rport->port_id = dp->ids.port_id; |
| rport->port_name = dp->ids.port_name; |
| rport->node_name = dp->ids.node_name; |
| rport->roles = dp->ids.roles; |
| rport->maxframe_size = FC_MIN_MAX_PAYLOAD; |
| /* |
| * Note: all this libfc rogue rport code will be removed for |
| * upstream so it fine that this is really ugly and hacky right now. |
| */ |
| device_initialize(&rport->dev); |
| rport->dev.release = fc_rport_rogue_destroy; |
| |
| mutex_init(&rdata->rp_mutex); |
| rdata->local_port = dp->lp; |
| rdata->trans_state = FC_PORTSTATE_ROGUE; |
| rdata->rp_state = RPORT_ST_INIT; |
| rdata->event = RPORT_EV_NONE; |
| rdata->flags = FC_RP_FLAGS_REC_SUPPORTED; |
| rdata->ops = NULL; |
| rdata->e_d_tov = dp->lp->e_d_tov; |
| rdata->r_a_tov = dp->lp->r_a_tov; |
| INIT_DELAYED_WORK(&rdata->retry_work, fc_rport_timeout); |
| INIT_WORK(&rdata->event_work, fc_rport_work); |
| /* |
| * For good measure, but not necessary as we should only |
| * add REAL rport to the lport list. |
| */ |
| INIT_LIST_HEAD(&rdata->peers); |
| |
| return rport; |
| } |
| |
| /** |
| * fc_rport_state() - return a string for the state the rport is in |
| * @rport: The rport whose state we want to get a string for |
| */ |
| static const char *fc_rport_state(struct fc_rport *rport) |
| { |
| const char *cp; |
| struct fc_rport_libfc_priv *rdata = rport->dd_data; |
| |
| cp = fc_rport_state_names[rdata->rp_state]; |
| if (!cp) |
| cp = "Unknown"; |
| return cp; |
| } |
| |
| /** |
| * fc_set_rport_loss_tmo() - Set the remote port loss timeout in seconds. |
| * @rport: Pointer to Fibre Channel remote port structure |
| * @timeout: timeout in seconds |
| */ |
| void fc_set_rport_loss_tmo(struct fc_rport *rport, u32 timeout) |
| { |
| if (timeout) |
| rport->dev_loss_tmo = timeout + 5; |
| else |
| rport->dev_loss_tmo = 30; |
| } |
| EXPORT_SYMBOL(fc_set_rport_loss_tmo); |
| |
| /** |
| * fc_plogi_get_maxframe() - Get max payload from the common service parameters |
| * @flp: FLOGI payload structure |
| * @maxval: upper limit, may be less than what is in the service parameters |
| */ |
| static unsigned int fc_plogi_get_maxframe(struct fc_els_flogi *flp, |
| unsigned int maxval) |
| { |
| unsigned int mfs; |
| |
| /* |
| * Get max payload from the common service parameters and the |
| * class 3 receive data field size. |
| */ |
| mfs = ntohs(flp->fl_csp.sp_bb_data) & FC_SP_BB_DATA_MASK; |
| if (mfs >= FC_SP_MIN_MAX_PAYLOAD && mfs < maxval) |
| maxval = mfs; |
| mfs = ntohs(flp->fl_cssp[3 - 1].cp_rdfs); |
| if (mfs >= FC_SP_MIN_MAX_PAYLOAD && mfs < maxval) |
| maxval = mfs; |
| return maxval; |
| } |
| |
| /** |
| * fc_rport_state_enter() - Change the rport's state |
| * @rport: The rport whose state should change |
| * @new: The new state of the rport |
| * |
| * Locking Note: Called with the rport lock held |
| */ |
| static void fc_rport_state_enter(struct fc_rport *rport, |
| enum fc_rport_state new) |
| { |
| struct fc_rport_libfc_priv *rdata = rport->dd_data; |
| if (rdata->rp_state != new) |
| rdata->retries = 0; |
| rdata->rp_state = new; |
| } |
| |
| static void fc_rport_work(struct work_struct *work) |
| { |
| u32 port_id; |
| struct fc_rport_libfc_priv *rdata = |
| container_of(work, struct fc_rport_libfc_priv, event_work); |
| enum fc_rport_event event; |
| enum fc_rport_trans_state trans_state; |
| struct fc_lport *lport = rdata->local_port; |
| struct fc_rport_operations *rport_ops; |
| struct fc_rport *rport = PRIV_TO_RPORT(rdata); |
| |
| mutex_lock(&rdata->rp_mutex); |
| event = rdata->event; |
| rport_ops = rdata->ops; |
| |
| if (event == RPORT_EV_CREATED) { |
| struct fc_rport *new_rport; |
| struct fc_rport_libfc_priv *new_rdata; |
| struct fc_rport_identifiers ids; |
| |
| ids.port_id = rport->port_id; |
| ids.roles = rport->roles; |
| ids.port_name = rport->port_name; |
| ids.node_name = rport->node_name; |
| |
| mutex_unlock(&rdata->rp_mutex); |
| |
| new_rport = fc_remote_port_add(lport->host, 0, &ids); |
| if (new_rport) { |
| /* |
| * Switch from the rogue rport to the rport |
| * returned by the FC class. |
| */ |
| new_rport->maxframe_size = rport->maxframe_size; |
| |
| new_rdata = new_rport->dd_data; |
| new_rdata->e_d_tov = rdata->e_d_tov; |
| new_rdata->r_a_tov = rdata->r_a_tov; |
| new_rdata->ops = rdata->ops; |
| new_rdata->local_port = rdata->local_port; |
| new_rdata->flags = FC_RP_FLAGS_REC_SUPPORTED; |
| new_rdata->trans_state = FC_PORTSTATE_REAL; |
| mutex_init(&new_rdata->rp_mutex); |
| INIT_DELAYED_WORK(&new_rdata->retry_work, |
| fc_rport_timeout); |
| INIT_LIST_HEAD(&new_rdata->peers); |
| INIT_WORK(&new_rdata->event_work, fc_rport_work); |
| |
| fc_rport_state_enter(new_rport, RPORT_ST_READY); |
| } else { |
| FC_DBG("Failed to create the rport for port " |
| "(%6x).\n", ids.port_id); |
| event = RPORT_EV_FAILED; |
| } |
| put_device(&rport->dev); |
| rport = new_rport; |
| rdata = new_rport->dd_data; |
| if (rport_ops->event_callback) |
| rport_ops->event_callback(lport, rport, event); |
| } else if ((event == RPORT_EV_FAILED) || |
| (event == RPORT_EV_LOGO) || |
| (event == RPORT_EV_STOP)) { |
| trans_state = rdata->trans_state; |
| mutex_unlock(&rdata->rp_mutex); |
| if (rport_ops->event_callback) |
| rport_ops->event_callback(lport, rport, event); |
| if (trans_state == FC_PORTSTATE_ROGUE) |
| put_device(&rport->dev); |
| else { |
| port_id = rport->port_id; |
| fc_remote_port_delete(rport); |
| lport->tt.exch_mgr_reset(lport, 0, port_id); |
| lport->tt.exch_mgr_reset(lport, port_id, 0); |
| } |
| } else |
| mutex_unlock(&rdata->rp_mutex); |
| } |
| |
| /** |
| * fc_rport_login() - Start the remote port login state machine |
| * @rport: Fibre Channel remote port |
| * |
| * Locking Note: Called without the rport lock held. This |
| * function will hold the rport lock, call an _enter_* |
| * function and then unlock the rport. |
| */ |
| int fc_rport_login(struct fc_rport *rport) |
| { |
| struct fc_rport_libfc_priv *rdata = rport->dd_data; |
| |
| mutex_lock(&rdata->rp_mutex); |
| |
| FC_DEBUG_RPORT("Login to port (%6x)\n", rport->port_id); |
| |
| fc_rport_enter_plogi(rport); |
| |
| mutex_unlock(&rdata->rp_mutex); |
| |
| return 0; |
| } |
| |
| /** |
| * fc_rport_logoff() - Logoff and remove an rport |
| * @rport: Fibre Channel remote port to be removed |
| * |
| * Locking Note: Called without the rport lock held. This |
| * function will hold the rport lock, call an _enter_* |
| * function and then unlock the rport. |
| */ |
| int fc_rport_logoff(struct fc_rport *rport) |
| { |
| struct fc_rport_libfc_priv *rdata = rport->dd_data; |
| |
| mutex_lock(&rdata->rp_mutex); |
| |
| FC_DEBUG_RPORT("Remove port (%6x)\n", rport->port_id); |
| |
| fc_rport_enter_logo(rport); |
| |
| /* |
| * Change the state to NONE so that we discard |
| * the response. |
| */ |
| fc_rport_state_enter(rport, RPORT_ST_NONE); |
| |
| mutex_unlock(&rdata->rp_mutex); |
| |
| cancel_delayed_work_sync(&rdata->retry_work); |
| |
| mutex_lock(&rdata->rp_mutex); |
| |
| rdata->event = RPORT_EV_STOP; |
| queue_work(rport_event_queue, &rdata->event_work); |
| |
| mutex_unlock(&rdata->rp_mutex); |
| |
| return 0; |
| } |
| |
| /** |
| * fc_rport_enter_ready() - The rport is ready |
| * @rport: Fibre Channel remote port that is ready |
| * |
| * Locking Note: The rport lock is expected to be held before calling |
| * this routine. |
| */ |
| static void fc_rport_enter_ready(struct fc_rport *rport) |
| { |
| struct fc_rport_libfc_priv *rdata = rport->dd_data; |
| |
| fc_rport_state_enter(rport, RPORT_ST_READY); |
| |
| FC_DEBUG_RPORT("Port (%6x) is Ready\n", rport->port_id); |
| |
| rdata->event = RPORT_EV_CREATED; |
| queue_work(rport_event_queue, &rdata->event_work); |
| } |
| |
| /** |
| * fc_rport_timeout() - Handler for the retry_work timer. |
| * @work: The work struct of the fc_rport_libfc_priv |
| * |
| * Locking Note: Called without the rport lock held. This |
| * function will hold the rport lock, call an _enter_* |
| * function and then unlock the rport. |
| */ |
| static void fc_rport_timeout(struct work_struct *work) |
| { |
| struct fc_rport_libfc_priv *rdata = |
| container_of(work, struct fc_rport_libfc_priv, retry_work.work); |
| struct fc_rport *rport = PRIV_TO_RPORT(rdata); |
| |
| mutex_lock(&rdata->rp_mutex); |
| |
| switch (rdata->rp_state) { |
| case RPORT_ST_PLOGI: |
| fc_rport_enter_plogi(rport); |
| break; |
| case RPORT_ST_PRLI: |
| fc_rport_enter_prli(rport); |
| break; |
| case RPORT_ST_RTV: |
| fc_rport_enter_rtv(rport); |
| break; |
| case RPORT_ST_LOGO: |
| fc_rport_enter_logo(rport); |
| break; |
| case RPORT_ST_READY: |
| case RPORT_ST_INIT: |
| case RPORT_ST_NONE: |
| break; |
| } |
| |
| mutex_unlock(&rdata->rp_mutex); |
| put_device(&rport->dev); |
| } |
| |
| /** |
| * fc_rport_error() - Error handler, called once retries have been exhausted |
| * @rport: The fc_rport object |
| * @fp: The frame pointer |
| * |
| * Locking Note: The rport lock is expected to be held before |
| * calling this routine |
| */ |
| static void fc_rport_error(struct fc_rport *rport, struct fc_frame *fp) |
| { |
| struct fc_rport_libfc_priv *rdata = rport->dd_data; |
| |
| FC_DEBUG_RPORT("Error %ld in state %s, retries %d\n", |
| PTR_ERR(fp), fc_rport_state(rport), rdata->retries); |
| |
| switch (rdata->rp_state) { |
| case RPORT_ST_PLOGI: |
| case RPORT_ST_PRLI: |
| case RPORT_ST_LOGO: |
| rdata->event = RPORT_EV_FAILED; |
| queue_work(rport_event_queue, |
| &rdata->event_work); |
| break; |
| case RPORT_ST_RTV: |
| fc_rport_enter_ready(rport); |
| break; |
| case RPORT_ST_NONE: |
| case RPORT_ST_READY: |
| case RPORT_ST_INIT: |
| break; |
| } |
| } |
| |
| /** |
| * fc_rport_error_retry() - Error handler when retries are desired |
| * @rport: The fc_rport object |
| * @fp: The frame pointer |
| * |
| * If the error was an exchange timeout retry immediately, |
| * otherwise wait for E_D_TOV. |
| * |
| * Locking Note: The rport lock is expected to be held before |
| * calling this routine |
| */ |
| static void fc_rport_error_retry(struct fc_rport *rport, struct fc_frame *fp) |
| { |
| struct fc_rport_libfc_priv *rdata = rport->dd_data; |
| unsigned long delay = FC_DEF_E_D_TOV; |
| |
| /* make sure this isn't an FC_EX_CLOSED error, never retry those */ |
| if (PTR_ERR(fp) == -FC_EX_CLOSED) |
| return fc_rport_error(rport, fp); |
| |
| if (rdata->retries < rdata->local_port->max_retry_count) { |
| FC_DEBUG_RPORT("Error %ld in state %s, retrying\n", |
| PTR_ERR(fp), fc_rport_state(rport)); |
| rdata->retries++; |
| /* no additional delay on exchange timeouts */ |
| if (PTR_ERR(fp) == -FC_EX_TIMEOUT) |
| delay = 0; |
| get_device(&rport->dev); |
| schedule_delayed_work(&rdata->retry_work, delay); |
| return; |
| } |
| |
| return fc_rport_error(rport, fp); |
| } |
| |
| /** |
| * fc_rport_plogi_recv_resp() - Handle incoming ELS PLOGI response |
| * @sp: current sequence in the PLOGI exchange |
| * @fp: response frame |
| * @rp_arg: Fibre Channel remote port |
| * |
| * Locking Note: This function will be called without the rport lock |
| * held, but it will lock, call an _enter_* function or fc_rport_error |
| * and then unlock the rport. |
| */ |
| static void fc_rport_plogi_resp(struct fc_seq *sp, struct fc_frame *fp, |
| void *rp_arg) |
| { |
| struct fc_rport *rport = rp_arg; |
| struct fc_rport_libfc_priv *rdata = rport->dd_data; |
| struct fc_lport *lport = rdata->local_port; |
| struct fc_els_flogi *plp; |
| unsigned int tov; |
| u16 csp_seq; |
| u16 cssp_seq; |
| u8 op; |
| |
| mutex_lock(&rdata->rp_mutex); |
| |
| FC_DEBUG_RPORT("Received a PLOGI response from port (%6x)\n", |
| rport->port_id); |
| |
| if (IS_ERR(fp)) { |
| fc_rport_error_retry(rport, fp); |
| goto err; |
| } |
| |
| if (rdata->rp_state != RPORT_ST_PLOGI) { |
| FC_DBG("Received a PLOGI response, but in state %s\n", |
| fc_rport_state(rport)); |
| goto out; |
| } |
| |
| op = fc_frame_payload_op(fp); |
| if (op == ELS_LS_ACC && |
| (plp = fc_frame_payload_get(fp, sizeof(*plp))) != NULL) { |
| rport->port_name = get_unaligned_be64(&plp->fl_wwpn); |
| rport->node_name = get_unaligned_be64(&plp->fl_wwnn); |
| |
| tov = ntohl(plp->fl_csp.sp_e_d_tov); |
| if (ntohs(plp->fl_csp.sp_features) & FC_SP_FT_EDTR) |
| tov /= 1000; |
| if (tov > rdata->e_d_tov) |
| rdata->e_d_tov = tov; |
| csp_seq = ntohs(plp->fl_csp.sp_tot_seq); |
| cssp_seq = ntohs(plp->fl_cssp[3 - 1].cp_con_seq); |
| if (cssp_seq < csp_seq) |
| csp_seq = cssp_seq; |
| rdata->max_seq = csp_seq; |
| rport->maxframe_size = |
| fc_plogi_get_maxframe(plp, lport->mfs); |
| |
| /* |
| * If the rport is one of the well known addresses |
| * we skip PRLI and RTV and go straight to READY. |
| */ |
| if (rport->port_id >= FC_FID_DOM_MGR) |
| fc_rport_enter_ready(rport); |
| else |
| fc_rport_enter_prli(rport); |
| } else |
| fc_rport_error_retry(rport, fp); |
| |
| out: |
| fc_frame_free(fp); |
| err: |
| mutex_unlock(&rdata->rp_mutex); |
| put_device(&rport->dev); |
| } |
| |
| /** |
| * fc_rport_enter_plogi() - Send Port Login (PLOGI) request to peer |
| * @rport: Fibre Channel remote port to send PLOGI to |
| * |
| * Locking Note: The rport lock is expected to be held before calling |
| * this routine. |
| */ |
| static void fc_rport_enter_plogi(struct fc_rport *rport) |
| { |
| struct fc_rport_libfc_priv *rdata = rport->dd_data; |
| struct fc_lport *lport = rdata->local_port; |
| struct fc_frame *fp; |
| |
| FC_DEBUG_RPORT("Port (%6x) entered PLOGI state from %s state\n", |
| rport->port_id, fc_rport_state(rport)); |
| |
| fc_rport_state_enter(rport, RPORT_ST_PLOGI); |
| |
| rport->maxframe_size = FC_MIN_MAX_PAYLOAD; |
| fp = fc_frame_alloc(lport, sizeof(struct fc_els_flogi)); |
| if (!fp) { |
| fc_rport_error_retry(rport, fp); |
| return; |
| } |
| rdata->e_d_tov = lport->e_d_tov; |
| |
| if (!lport->tt.elsct_send(lport, rport, fp, ELS_PLOGI, |
| fc_rport_plogi_resp, rport, lport->e_d_tov)) |
| fc_rport_error_retry(rport, fp); |
| else |
| get_device(&rport->dev); |
| } |
| |
| /** |
| * fc_rport_prli_resp() - Process Login (PRLI) response handler |
| * @sp: current sequence in the PRLI exchange |
| * @fp: response frame |
| * @rp_arg: Fibre Channel remote port |
| * |
| * Locking Note: This function will be called without the rport lock |
| * held, but it will lock, call an _enter_* function or fc_rport_error |
| * and then unlock the rport. |
| */ |
| static void fc_rport_prli_resp(struct fc_seq *sp, struct fc_frame *fp, |
| void *rp_arg) |
| { |
| struct fc_rport *rport = rp_arg; |
| struct fc_rport_libfc_priv *rdata = rport->dd_data; |
| struct { |
| struct fc_els_prli prli; |
| struct fc_els_spp spp; |
| } *pp; |
| u32 roles = FC_RPORT_ROLE_UNKNOWN; |
| u32 fcp_parm = 0; |
| u8 op; |
| |
| mutex_lock(&rdata->rp_mutex); |
| |
| FC_DEBUG_RPORT("Received a PRLI response from port (%6x)\n", |
| rport->port_id); |
| |
| if (IS_ERR(fp)) { |
| fc_rport_error_retry(rport, fp); |
| goto err; |
| } |
| |
| if (rdata->rp_state != RPORT_ST_PRLI) { |
| FC_DBG("Received a PRLI response, but in state %s\n", |
| fc_rport_state(rport)); |
| goto out; |
| } |
| |
| op = fc_frame_payload_op(fp); |
| if (op == ELS_LS_ACC) { |
| pp = fc_frame_payload_get(fp, sizeof(*pp)); |
| if (pp && pp->prli.prli_spp_len >= sizeof(pp->spp)) { |
| fcp_parm = ntohl(pp->spp.spp_params); |
| if (fcp_parm & FCP_SPPF_RETRY) |
| rdata->flags |= FC_RP_FLAGS_RETRY; |
| } |
| |
| rport->supported_classes = FC_COS_CLASS3; |
| if (fcp_parm & FCP_SPPF_INIT_FCN) |
| roles |= FC_RPORT_ROLE_FCP_INITIATOR; |
| if (fcp_parm & FCP_SPPF_TARG_FCN) |
| roles |= FC_RPORT_ROLE_FCP_TARGET; |
| |
| rport->roles = roles; |
| fc_rport_enter_rtv(rport); |
| |
| } else { |
| FC_DBG("Bad ELS response\n"); |
| rdata->event = RPORT_EV_FAILED; |
| queue_work(rport_event_queue, &rdata->event_work); |
| } |
| |
| out: |
| fc_frame_free(fp); |
| err: |
| mutex_unlock(&rdata->rp_mutex); |
| put_device(&rport->dev); |
| } |
| |
| /** |
| * fc_rport_logo_resp() - Logout (LOGO) response handler |
| * @sp: current sequence in the LOGO exchange |
| * @fp: response frame |
| * @rp_arg: Fibre Channel remote port |
| * |
| * Locking Note: This function will be called without the rport lock |
| * held, but it will lock, call an _enter_* function or fc_rport_error |
| * and then unlock the rport. |
| */ |
| static void fc_rport_logo_resp(struct fc_seq *sp, struct fc_frame *fp, |
| void *rp_arg) |
| { |
| struct fc_rport *rport = rp_arg; |
| struct fc_rport_libfc_priv *rdata = rport->dd_data; |
| u8 op; |
| |
| mutex_lock(&rdata->rp_mutex); |
| |
| FC_DEBUG_RPORT("Received a LOGO response from port (%6x)\n", |
| rport->port_id); |
| |
| if (IS_ERR(fp)) { |
| fc_rport_error_retry(rport, fp); |
| goto err; |
| } |
| |
| if (rdata->rp_state != RPORT_ST_LOGO) { |
| FC_DEBUG_RPORT("Received a LOGO response, but in state %s\n", |
| fc_rport_state(rport)); |
| goto out; |
| } |
| |
| op = fc_frame_payload_op(fp); |
| if (op == ELS_LS_ACC) { |
| fc_rport_enter_rtv(rport); |
| } else { |
| FC_DBG("Bad ELS response\n"); |
| rdata->event = RPORT_EV_LOGO; |
| queue_work(rport_event_queue, &rdata->event_work); |
| } |
| |
| out: |
| fc_frame_free(fp); |
| err: |
| mutex_unlock(&rdata->rp_mutex); |
| put_device(&rport->dev); |
| } |
| |
| /** |
| * fc_rport_enter_prli() - Send Process Login (PRLI) request to peer |
| * @rport: Fibre Channel remote port to send PRLI to |
| * |
| * Locking Note: The rport lock is expected to be held before calling |
| * this routine. |
| */ |
| static void fc_rport_enter_prli(struct fc_rport *rport) |
| { |
| struct fc_rport_libfc_priv *rdata = rport->dd_data; |
| struct fc_lport *lport = rdata->local_port; |
| struct { |
| struct fc_els_prli prli; |
| struct fc_els_spp spp; |
| } *pp; |
| struct fc_frame *fp; |
| |
| FC_DEBUG_RPORT("Port (%6x) entered PRLI state from %s state\n", |
| rport->port_id, fc_rport_state(rport)); |
| |
| fc_rport_state_enter(rport, RPORT_ST_PRLI); |
| |
| fp = fc_frame_alloc(lport, sizeof(*pp)); |
| if (!fp) { |
| fc_rport_error_retry(rport, fp); |
| return; |
| } |
| |
| if (!lport->tt.elsct_send(lport, rport, fp, ELS_PRLI, |
| fc_rport_prli_resp, rport, lport->e_d_tov)) |
| fc_rport_error_retry(rport, fp); |
| else |
| get_device(&rport->dev); |
| } |
| |
| /** |
| * fc_rport_els_rtv_resp() - Request Timeout Value response handler |
| * @sp: current sequence in the RTV exchange |
| * @fp: response frame |
| * @rp_arg: Fibre Channel remote port |
| * |
| * Many targets don't seem to support this. |
| * |
| * Locking Note: This function will be called without the rport lock |
| * held, but it will lock, call an _enter_* function or fc_rport_error |
| * and then unlock the rport. |
| */ |
| static void fc_rport_rtv_resp(struct fc_seq *sp, struct fc_frame *fp, |
| void *rp_arg) |
| { |
| struct fc_rport *rport = rp_arg; |
| struct fc_rport_libfc_priv *rdata = rport->dd_data; |
| u8 op; |
| |
| mutex_lock(&rdata->rp_mutex); |
| |
| FC_DEBUG_RPORT("Received a RTV response from port (%6x)\n", |
| rport->port_id); |
| |
| if (IS_ERR(fp)) { |
| fc_rport_error(rport, fp); |
| goto err; |
| } |
| |
| if (rdata->rp_state != RPORT_ST_RTV) { |
| FC_DBG("Received a RTV response, but in state %s\n", |
| fc_rport_state(rport)); |
| goto out; |
| } |
| |
| op = fc_frame_payload_op(fp); |
| if (op == ELS_LS_ACC) { |
| struct fc_els_rtv_acc *rtv; |
| u32 toq; |
| u32 tov; |
| |
| rtv = fc_frame_payload_get(fp, sizeof(*rtv)); |
| if (rtv) { |
| toq = ntohl(rtv->rtv_toq); |
| tov = ntohl(rtv->rtv_r_a_tov); |
| if (tov == 0) |
| tov = 1; |
| rdata->r_a_tov = tov; |
| tov = ntohl(rtv->rtv_e_d_tov); |
| if (toq & FC_ELS_RTV_EDRES) |
| tov /= 1000000; |
| if (tov == 0) |
| tov = 1; |
| rdata->e_d_tov = tov; |
| } |
| } |
| |
| fc_rport_enter_ready(rport); |
| |
| out: |
| fc_frame_free(fp); |
| err: |
| mutex_unlock(&rdata->rp_mutex); |
| put_device(&rport->dev); |
| } |
| |
| /** |
| * fc_rport_enter_rtv() - Send Request Timeout Value (RTV) request to peer |
| * @rport: Fibre Channel remote port to send RTV to |
| * |
| * Locking Note: The rport lock is expected to be held before calling |
| * this routine. |
| */ |
| static void fc_rport_enter_rtv(struct fc_rport *rport) |
| { |
| struct fc_frame *fp; |
| struct fc_rport_libfc_priv *rdata = rport->dd_data; |
| struct fc_lport *lport = rdata->local_port; |
| |
| FC_DEBUG_RPORT("Port (%6x) entered RTV state from %s state\n", |
| rport->port_id, fc_rport_state(rport)); |
| |
| fc_rport_state_enter(rport, RPORT_ST_RTV); |
| |
| fp = fc_frame_alloc(lport, sizeof(struct fc_els_rtv)); |
| if (!fp) { |
| fc_rport_error_retry(rport, fp); |
| return; |
| } |
| |
| if (!lport->tt.elsct_send(lport, rport, fp, ELS_RTV, |
| fc_rport_rtv_resp, rport, lport->e_d_tov)) |
| fc_rport_error_retry(rport, fp); |
| else |
| get_device(&rport->dev); |
| } |
| |
| /** |
| * fc_rport_enter_logo() - Send Logout (LOGO) request to peer |
| * @rport: Fibre Channel remote port to send LOGO to |
| * |
| * Locking Note: The rport lock is expected to be held before calling |
| * this routine. |
| */ |
| static void fc_rport_enter_logo(struct fc_rport *rport) |
| { |
| struct fc_rport_libfc_priv *rdata = rport->dd_data; |
| struct fc_lport *lport = rdata->local_port; |
| struct fc_frame *fp; |
| |
| FC_DEBUG_RPORT("Port (%6x) entered LOGO state from %s state\n", |
| rport->port_id, fc_rport_state(rport)); |
| |
| fc_rport_state_enter(rport, RPORT_ST_LOGO); |
| |
| fp = fc_frame_alloc(lport, sizeof(struct fc_els_logo)); |
| if (!fp) { |
| fc_rport_error_retry(rport, fp); |
| return; |
| } |
| |
| if (!lport->tt.elsct_send(lport, rport, fp, ELS_LOGO, |
| fc_rport_logo_resp, rport, lport->e_d_tov)) |
| fc_rport_error_retry(rport, fp); |
| else |
| get_device(&rport->dev); |
| } |
| |
| |
| /** |
| * fc_rport_recv_req() - Receive a request from a rport |
| * @sp: current sequence in the PLOGI exchange |
| * @fp: response frame |
| * @rp_arg: Fibre Channel remote port |
| * |
| * Locking Note: Called without the rport lock held. This |
| * function will hold the rport lock, call an _enter_* |
| * function and then unlock the rport. |
| */ |
| void fc_rport_recv_req(struct fc_seq *sp, struct fc_frame *fp, |
| struct fc_rport *rport) |
| { |
| struct fc_rport_libfc_priv *rdata = rport->dd_data; |
| struct fc_lport *lport = rdata->local_port; |
| |
| struct fc_frame_header *fh; |
| struct fc_seq_els_data els_data; |
| u8 op; |
| |
| mutex_lock(&rdata->rp_mutex); |
| |
| els_data.fp = NULL; |
| els_data.explan = ELS_EXPL_NONE; |
| els_data.reason = ELS_RJT_NONE; |
| |
| fh = fc_frame_header_get(fp); |
| |
| if (fh->fh_r_ctl == FC_RCTL_ELS_REQ && fh->fh_type == FC_TYPE_ELS) { |
| op = fc_frame_payload_op(fp); |
| switch (op) { |
| case ELS_PLOGI: |
| fc_rport_recv_plogi_req(rport, sp, fp); |
| break; |
| case ELS_PRLI: |
| fc_rport_recv_prli_req(rport, sp, fp); |
| break; |
| case ELS_PRLO: |
| fc_rport_recv_prlo_req(rport, sp, fp); |
| break; |
| case ELS_LOGO: |
| fc_rport_recv_logo_req(rport, sp, fp); |
| break; |
| case ELS_RRQ: |
| els_data.fp = fp; |
| lport->tt.seq_els_rsp_send(sp, ELS_RRQ, &els_data); |
| break; |
| case ELS_REC: |
| els_data.fp = fp; |
| lport->tt.seq_els_rsp_send(sp, ELS_REC, &els_data); |
| break; |
| default: |
| els_data.reason = ELS_RJT_UNSUP; |
| lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &els_data); |
| break; |
| } |
| } |
| |
| mutex_unlock(&rdata->rp_mutex); |
| } |
| |
| /** |
| * fc_rport_recv_plogi_req() - Handle incoming Port Login (PLOGI) request |
| * @rport: Fibre Channel remote port that initiated PLOGI |
| * @sp: current sequence in the PLOGI exchange |
| * @fp: PLOGI request frame |
| * |
| * Locking Note: The rport lock is exected to be held before calling |
| * this function. |
| */ |
| static void fc_rport_recv_plogi_req(struct fc_rport *rport, |
| struct fc_seq *sp, struct fc_frame *rx_fp) |
| { |
| struct fc_rport_libfc_priv *rdata = rport->dd_data; |
| struct fc_lport *lport = rdata->local_port; |
| struct fc_frame *fp = rx_fp; |
| struct fc_exch *ep; |
| struct fc_frame_header *fh; |
| struct fc_els_flogi *pl; |
| struct fc_seq_els_data rjt_data; |
| u32 sid; |
| u64 wwpn; |
| u64 wwnn; |
| enum fc_els_rjt_reason reject = 0; |
| u32 f_ctl; |
| rjt_data.fp = NULL; |
| |
| fh = fc_frame_header_get(fp); |
| |
| FC_DEBUG_RPORT("Received PLOGI request from port (%6x) " |
| "while in state %s\n", ntoh24(fh->fh_s_id), |
| fc_rport_state(rport)); |
| |
| sid = ntoh24(fh->fh_s_id); |
| pl = fc_frame_payload_get(fp, sizeof(*pl)); |
| if (!pl) { |
| FC_DBG("incoming PLOGI from %x too short\n", sid); |
| WARN_ON(1); |
| /* XXX TBD: send reject? */ |
| fc_frame_free(fp); |
| return; |
| } |
| wwpn = get_unaligned_be64(&pl->fl_wwpn); |
| wwnn = get_unaligned_be64(&pl->fl_wwnn); |
| |
| /* |
| * If the session was just created, possibly due to the incoming PLOGI, |
| * set the state appropriately and accept the PLOGI. |
| * |
| * If we had also sent a PLOGI, and if the received PLOGI is from a |
| * higher WWPN, we accept it, otherwise an LS_RJT is sent with reason |
| * "command already in progress". |
| * |
| * XXX TBD: If the session was ready before, the PLOGI should result in |
| * all outstanding exchanges being reset. |
| */ |
| switch (rdata->rp_state) { |
| case RPORT_ST_INIT: |
| FC_DEBUG_RPORT("incoming PLOGI from %6x wwpn %llx state INIT " |
| "- reject\n", sid, (unsigned long long)wwpn); |
| reject = ELS_RJT_UNSUP; |
| break; |
| case RPORT_ST_PLOGI: |
| FC_DEBUG_RPORT("incoming PLOGI from %x in PLOGI state %d\n", |
| sid, rdata->rp_state); |
| if (wwpn < lport->wwpn) |
| reject = ELS_RJT_INPROG; |
| break; |
| case RPORT_ST_PRLI: |
| case RPORT_ST_READY: |
| FC_DEBUG_RPORT("incoming PLOGI from %x in logged-in state %d " |
| "- ignored for now\n", sid, rdata->rp_state); |
| /* XXX TBD - should reset */ |
| break; |
| case RPORT_ST_NONE: |
| default: |
| FC_DEBUG_RPORT("incoming PLOGI from %x in unexpected " |
| "state %d\n", sid, rdata->rp_state); |
| break; |
| } |
| |
| if (reject) { |
| rjt_data.reason = reject; |
| rjt_data.explan = ELS_EXPL_NONE; |
| lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &rjt_data); |
| fc_frame_free(fp); |
| } else { |
| fp = fc_frame_alloc(lport, sizeof(*pl)); |
| if (fp == NULL) { |
| fp = rx_fp; |
| 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 { |
| sp = lport->tt.seq_start_next(sp); |
| WARN_ON(!sp); |
| fc_rport_set_name(rport, wwpn, wwnn); |
| |
| /* |
| * Get session payload size from incoming PLOGI. |
| */ |
| rport->maxframe_size = |
| fc_plogi_get_maxframe(pl, lport->mfs); |
| fc_frame_free(rx_fp); |
| fc_plogi_fill(lport, fp, ELS_LS_ACC); |
| |
| /* |
| * Send LS_ACC. If this fails, |
| * the originator should retry. |
| */ |
| f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ; |
| f_ctl |= FC_FC_END_SEQ | FC_FC_SEQ_INIT; |
| 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); |
| if (rdata->rp_state == RPORT_ST_PLOGI) |
| fc_rport_enter_prli(rport); |
| } |
| } |
| } |
| |
| /** |
| * fc_rport_recv_prli_req() - Handle incoming Process Login (PRLI) request |
| * @rport: Fibre Channel remote port that initiated PRLI |
| * @sp: current sequence in the PRLI exchange |
| * @fp: PRLI request frame |
| * |
| * Locking Note: The rport lock is exected to be held before calling |
| * this function. |
| */ |
| static void fc_rport_recv_prli_req(struct fc_rport *rport, |
| struct fc_seq *sp, struct fc_frame *rx_fp) |
| { |
| struct fc_rport_libfc_priv *rdata = rport->dd_data; |
| struct fc_lport *lport = rdata->local_port; |
| struct fc_exch *ep; |
| struct fc_frame *fp; |
| struct fc_frame_header *fh; |
| struct { |
| struct fc_els_prli prli; |
| struct fc_els_spp spp; |
| } *pp; |
| struct fc_els_spp *rspp; /* request service param page */ |
| struct fc_els_spp *spp; /* response spp */ |
| unsigned int len; |
| unsigned int plen; |
| enum fc_els_rjt_reason reason = ELS_RJT_UNAB; |
| enum fc_els_rjt_explan explan = ELS_EXPL_NONE; |
| enum fc_els_spp_resp resp; |
| struct fc_seq_els_data rjt_data; |
| u32 f_ctl; |
| u32 fcp_parm; |
| u32 roles = FC_RPORT_ROLE_UNKNOWN; |
| rjt_data.fp = NULL; |
| |
| fh = fc_frame_header_get(rx_fp); |
| |
| FC_DEBUG_RPORT("Received PRLI request from port (%6x) " |
| "while in state %s\n", ntoh24(fh->fh_s_id), |
| fc_rport_state(rport)); |
| |
| switch (rdata->rp_state) { |
| case RPORT_ST_PRLI: |
| case RPORT_ST_READY: |
| reason = ELS_RJT_NONE; |
| break; |
| default: |
| break; |
| } |
| len = fr_len(rx_fp) - sizeof(*fh); |
| pp = fc_frame_payload_get(rx_fp, sizeof(*pp)); |
| if (pp == NULL) { |
| reason = ELS_RJT_PROT; |
| explan = ELS_EXPL_INV_LEN; |
| } else { |
| plen = ntohs(pp->prli.prli_len); |
| if ((plen % 4) != 0 || plen > len) { |
| reason = ELS_RJT_PROT; |
| explan = ELS_EXPL_INV_LEN; |
| } else if (plen < len) { |
| len = plen; |
| } |
| plen = pp->prli.prli_spp_len; |
| if ((plen % 4) != 0 || plen < sizeof(*spp) || |
| plen > len || len < sizeof(*pp)) { |
| reason = ELS_RJT_PROT; |
| explan = ELS_EXPL_INV_LEN; |
| } |
| rspp = &pp->spp; |
| } |
| if (reason != ELS_RJT_NONE || |
| (fp = fc_frame_alloc(lport, len)) == NULL) { |
| rjt_data.reason = reason; |
| rjt_data.explan = explan; |
| lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &rjt_data); |
| } else { |
| sp = lport->tt.seq_start_next(sp); |
| WARN_ON(!sp); |
| pp = fc_frame_payload_get(fp, len); |
| WARN_ON(!pp); |
| memset(pp, 0, len); |
| pp->prli.prli_cmd = ELS_LS_ACC; |
| pp->prli.prli_spp_len = plen; |
| pp->prli.prli_len = htons(len); |
| len -= sizeof(struct fc_els_prli); |
| |
| /* |
| * Go through all the service parameter pages and build |
| * response. If plen indicates longer SPP than standard, |
| * use that. The entire response has been pre-cleared above. |
| */ |
| spp = &pp->spp; |
| while (len >= plen) { |
| spp->spp_type = rspp->spp_type; |
| spp->spp_type_ext = rspp->spp_type_ext; |
| spp->spp_flags = rspp->spp_flags & FC_SPP_EST_IMG_PAIR; |
| resp = FC_SPP_RESP_ACK; |
| if (rspp->spp_flags & FC_SPP_RPA_VAL) |
| resp = FC_SPP_RESP_NO_PA; |
| switch (rspp->spp_type) { |
| case 0: /* common to all FC-4 types */ |
| break; |
| case FC_TYPE_FCP: |
| fcp_parm = ntohl(rspp->spp_params); |
| if (fcp_parm * FCP_SPPF_RETRY) |
| rdata->flags |= FC_RP_FLAGS_RETRY; |
| rport->supported_classes = FC_COS_CLASS3; |
| if (fcp_parm & FCP_SPPF_INIT_FCN) |
| roles |= FC_RPORT_ROLE_FCP_INITIATOR; |
| if (fcp_parm & FCP_SPPF_TARG_FCN) |
| roles |= FC_RPORT_ROLE_FCP_TARGET; |
| rport->roles = roles; |
| |
| spp->spp_params = |
| htonl(lport->service_params); |
| break; |
| default: |
| resp = FC_SPP_RESP_INVL; |
| break; |
| } |
| spp->spp_flags |= resp; |
| len -= plen; |
| rspp = (struct fc_els_spp *)((char *)rspp + plen); |
| spp = (struct fc_els_spp *)((char *)spp + plen); |
| } |
| |
| /* |
| * Send LS_ACC. If this fails, the originator should retry. |
| */ |
| f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ; |
| f_ctl |= FC_FC_END_SEQ | FC_FC_SEQ_INIT; |
| 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); |
| |
| /* |
| * Get lock and re-check state. |
| */ |
| switch (rdata->rp_state) { |
| case RPORT_ST_PRLI: |
| fc_rport_enter_ready(rport); |
| break; |
| case RPORT_ST_READY: |
| break; |
| default: |
| break; |
| } |
| } |
| fc_frame_free(rx_fp); |
| } |
| |
| /** |
| * fc_rport_recv_prlo_req() - Handle incoming Process Logout (PRLO) request |
| * @rport: Fibre Channel remote port that initiated PRLO |
| * @sp: current sequence in the PRLO exchange |
| * @fp: PRLO request frame |
| * |
| * Locking Note: The rport lock is exected to be held before calling |
| * this function. |
| */ |
| static void fc_rport_recv_prlo_req(struct fc_rport *rport, struct fc_seq *sp, |
| struct fc_frame *fp) |
| { |
| struct fc_rport_libfc_priv *rdata = rport->dd_data; |
| struct fc_lport *lport = rdata->local_port; |
| |
| struct fc_frame_header *fh; |
| struct fc_seq_els_data rjt_data; |
| |
| fh = fc_frame_header_get(fp); |
| |
| FC_DEBUG_RPORT("Received PRLO request from port (%6x) " |
| "while in state %s\n", ntoh24(fh->fh_s_id), |
| fc_rport_state(rport)); |
| |
| 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); |
| } |
| |
| /** |
| * fc_rport_recv_logo_req() - Handle incoming Logout (LOGO) request |
| * @rport: Fibre Channel remote port that initiated LOGO |
| * @sp: current sequence in the LOGO exchange |
| * @fp: LOGO request frame |
| * |
| * Locking Note: The rport lock is exected to be held before calling |
| * this function. |
| */ |
| static void fc_rport_recv_logo_req(struct fc_rport *rport, struct fc_seq *sp, |
| struct fc_frame *fp) |
| { |
| struct fc_frame_header *fh; |
| struct fc_rport_libfc_priv *rdata = rport->dd_data; |
| struct fc_lport *lport = rdata->local_port; |
| |
| fh = fc_frame_header_get(fp); |
| |
| FC_DEBUG_RPORT("Received LOGO request from port (%6x) " |
| "while in state %s\n", ntoh24(fh->fh_s_id), |
| fc_rport_state(rport)); |
| |
| rdata->event = RPORT_EV_LOGO; |
| queue_work(rport_event_queue, &rdata->event_work); |
| |
| lport->tt.seq_els_rsp_send(sp, ELS_LS_ACC, NULL); |
| fc_frame_free(fp); |
| } |
| |
| static void fc_rport_flush_queue(void) |
| { |
| flush_workqueue(rport_event_queue); |
| } |
| |
| |
| int fc_rport_init(struct fc_lport *lport) |
| { |
| if (!lport->tt.rport_create) |
| lport->tt.rport_create = fc_rport_rogue_create; |
| |
| if (!lport->tt.rport_login) |
| lport->tt.rport_login = fc_rport_login; |
| |
| if (!lport->tt.rport_logoff) |
| lport->tt.rport_logoff = fc_rport_logoff; |
| |
| if (!lport->tt.rport_recv_req) |
| lport->tt.rport_recv_req = fc_rport_recv_req; |
| |
| if (!lport->tt.rport_flush_queue) |
| lport->tt.rport_flush_queue = fc_rport_flush_queue; |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(fc_rport_init); |
| |
| int fc_setup_rport() |
| { |
| rport_event_queue = create_singlethread_workqueue("fc_rport_eq"); |
| if (!rport_event_queue) |
| return -ENOMEM; |
| return 0; |
| } |
| EXPORT_SYMBOL(fc_setup_rport); |
| |
| void fc_destroy_rport() |
| { |
| destroy_workqueue(rport_event_queue); |
| } |
| EXPORT_SYMBOL(fc_destroy_rport); |
| |
| void fc_rport_terminate_io(struct fc_rport *rport) |
| { |
| struct fc_rport_libfc_priv *rdata = rport->dd_data; |
| struct fc_lport *lport = rdata->local_port; |
| |
| lport->tt.exch_mgr_reset(lport, 0, rport->port_id); |
| lport->tt.exch_mgr_reset(lport, rport->port_id, 0); |
| } |
| EXPORT_SYMBOL(fc_rport_terminate_io); |