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![FUJITA Tomonori](/assets/img/avatar_default.png)
I got the following warnings on IA64: drivers/scsi/libfc/fc_lport.c: In function 'fc_lport_recv_flogi_req': drivers/scsi/libfc/fc_lport.c:788: warning: format '%llx' expects type 'long long unsigned int', but argument 3 has type 'u64' drivers/scsi/libfc/fc_lport.c:792: warning: format '%llx' expects type 'long long unsigned int', but argument 3 has type 'u64' scsi/libfc/fc_rport.c: In function 'fc_rport_recv_plogi_req': /home/fujita/git/linux-2.6/drivers/scsi/libfc/fc_rport.c:968: warning: format '%llx' expects type 'long long unsigned int', but argument 4 has type 'u64' Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
1316 lines
35 KiB
C
1316 lines
35 KiB
C
/*
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* Copyright(c) 2007 - 2008 Intel Corporation. All rights reserved.
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*
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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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*
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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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* more details.
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*
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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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*
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* Maintained at www.Open-FCoE.org
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*/
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/*
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* RPORT GENERAL INFO
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*
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* This file contains all processing regarding fc_rports. It contains the
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* rport state machine and does all rport interaction with the transport class.
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* There should be no other places in libfc that interact directly with the
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* transport class in regards to adding and deleting rports.
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*
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* fc_rport's represent N_Port's within the fabric.
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*/
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/*
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* RPORT LOCKING
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*
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* The rport should never hold the rport mutex and then attempt to acquire
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* either the lport or disc mutexes. The rport's mutex is considered lesser
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* than both the lport's mutex and the disc mutex. Refer to fc_lport.c for
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* more comments on the heirarchy.
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*
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* The locking strategy is similar to the lport's strategy. The lock protects
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* the rport's states and is held and released by the entry points to the rport
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* block. All _enter_* functions correspond to rport states and expect the rport
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* mutex to be locked before calling them. This means that rports only handle
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* one request or response at a time, since they're not critical for the I/O
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* path this potential over-use of the mutex is acceptable.
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*/
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#include <linux/kernel.h>
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#include <linux/spinlock.h>
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#include <linux/interrupt.h>
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#include <linux/rcupdate.h>
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#include <linux/timer.h>
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#include <linux/workqueue.h>
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#include <asm/unaligned.h>
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#include <scsi/libfc.h>
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#include <scsi/fc_encode.h>
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static int fc_rport_debug;
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#define FC_DEBUG_RPORT(fmt...) \
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do { \
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if (fc_rport_debug) \
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FC_DBG(fmt); \
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} while (0)
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struct workqueue_struct *rport_event_queue;
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static void fc_rport_enter_plogi(struct fc_rport *);
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static void fc_rport_enter_prli(struct fc_rport *);
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static void fc_rport_enter_rtv(struct fc_rport *);
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static void fc_rport_enter_ready(struct fc_rport *);
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static void fc_rport_enter_logo(struct fc_rport *);
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static void fc_rport_recv_plogi_req(struct fc_rport *,
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struct fc_seq *, struct fc_frame *);
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static void fc_rport_recv_prli_req(struct fc_rport *,
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struct fc_seq *, struct fc_frame *);
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static void fc_rport_recv_prlo_req(struct fc_rport *,
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struct fc_seq *, struct fc_frame *);
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static void fc_rport_recv_logo_req(struct fc_rport *,
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struct fc_seq *, struct fc_frame *);
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static void fc_rport_timeout(struct work_struct *);
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static void fc_rport_error(struct fc_rport *, struct fc_frame *);
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static void fc_rport_error_retry(struct fc_rport *, struct fc_frame *);
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static void fc_rport_work(struct work_struct *);
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static const char *fc_rport_state_names[] = {
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[RPORT_ST_NONE] = "None",
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[RPORT_ST_INIT] = "Init",
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[RPORT_ST_PLOGI] = "PLOGI",
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[RPORT_ST_PRLI] = "PRLI",
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[RPORT_ST_RTV] = "RTV",
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[RPORT_ST_READY] = "Ready",
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[RPORT_ST_LOGO] = "LOGO",
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};
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static void fc_rport_rogue_destroy(struct device *dev)
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{
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struct fc_rport *rport = dev_to_rport(dev);
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FC_DEBUG_RPORT("Destroying rogue rport (%6x)\n", rport->port_id);
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kfree(rport);
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}
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struct fc_rport *fc_rport_rogue_create(struct fc_disc_port *dp)
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{
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struct fc_rport *rport;
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struct fc_rport_libfc_priv *rdata;
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rport = kzalloc(sizeof(*rport) + sizeof(*rdata), GFP_KERNEL);
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if (!rport)
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return NULL;
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rdata = RPORT_TO_PRIV(rport);
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rport->dd_data = rdata;
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rport->port_id = dp->ids.port_id;
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rport->port_name = dp->ids.port_name;
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rport->node_name = dp->ids.node_name;
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rport->roles = dp->ids.roles;
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rport->maxframe_size = FC_MIN_MAX_PAYLOAD;
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/*
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* Note: all this libfc rogue rport code will be removed for
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* upstream so it fine that this is really ugly and hacky right now.
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*/
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device_initialize(&rport->dev);
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rport->dev.release = fc_rport_rogue_destroy;
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mutex_init(&rdata->rp_mutex);
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rdata->local_port = dp->lp;
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rdata->trans_state = FC_PORTSTATE_ROGUE;
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rdata->rp_state = RPORT_ST_INIT;
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rdata->event = RPORT_EV_NONE;
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rdata->flags = FC_RP_FLAGS_REC_SUPPORTED;
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rdata->ops = NULL;
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rdata->e_d_tov = dp->lp->e_d_tov;
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rdata->r_a_tov = dp->lp->r_a_tov;
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INIT_DELAYED_WORK(&rdata->retry_work, fc_rport_timeout);
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INIT_WORK(&rdata->event_work, fc_rport_work);
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/*
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* For good measure, but not necessary as we should only
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* add REAL rport to the lport list.
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*/
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INIT_LIST_HEAD(&rdata->peers);
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return rport;
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}
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/**
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* fc_rport_state() - return a string for the state the rport is in
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* @rport: The rport whose state we want to get a string for
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*/
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static const char *fc_rport_state(struct fc_rport *rport)
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{
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const char *cp;
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struct fc_rport_libfc_priv *rdata = rport->dd_data;
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cp = fc_rport_state_names[rdata->rp_state];
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if (!cp)
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cp = "Unknown";
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return cp;
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}
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/**
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* fc_set_rport_loss_tmo() - Set the remote port loss timeout in seconds.
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* @rport: Pointer to Fibre Channel remote port structure
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* @timeout: timeout in seconds
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*/
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void fc_set_rport_loss_tmo(struct fc_rport *rport, u32 timeout)
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{
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if (timeout)
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rport->dev_loss_tmo = timeout + 5;
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else
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rport->dev_loss_tmo = 30;
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}
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EXPORT_SYMBOL(fc_set_rport_loss_tmo);
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/**
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* fc_plogi_get_maxframe() - Get max payload from the common service parameters
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* @flp: FLOGI payload structure
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* @maxval: upper limit, may be less than what is in the service parameters
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*/
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static unsigned int fc_plogi_get_maxframe(struct fc_els_flogi *flp,
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unsigned int maxval)
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{
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unsigned int mfs;
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/*
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* Get max payload from the common service parameters and the
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* class 3 receive data field size.
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*/
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mfs = ntohs(flp->fl_csp.sp_bb_data) & FC_SP_BB_DATA_MASK;
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if (mfs >= FC_SP_MIN_MAX_PAYLOAD && mfs < maxval)
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maxval = mfs;
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mfs = ntohs(flp->fl_cssp[3 - 1].cp_rdfs);
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if (mfs >= FC_SP_MIN_MAX_PAYLOAD && mfs < maxval)
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maxval = mfs;
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return maxval;
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}
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/**
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* fc_rport_state_enter() - Change the rport's state
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* @rport: The rport whose state should change
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* @new: The new state of the rport
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*
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* Locking Note: Called with the rport lock held
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*/
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static void fc_rport_state_enter(struct fc_rport *rport,
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enum fc_rport_state new)
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{
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struct fc_rport_libfc_priv *rdata = rport->dd_data;
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if (rdata->rp_state != new)
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rdata->retries = 0;
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rdata->rp_state = new;
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}
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static void fc_rport_work(struct work_struct *work)
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{
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u32 port_id;
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struct fc_rport_libfc_priv *rdata =
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container_of(work, struct fc_rport_libfc_priv, event_work);
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enum fc_rport_event event;
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enum fc_rport_trans_state trans_state;
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struct fc_lport *lport = rdata->local_port;
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struct fc_rport_operations *rport_ops;
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struct fc_rport *rport = PRIV_TO_RPORT(rdata);
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mutex_lock(&rdata->rp_mutex);
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event = rdata->event;
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rport_ops = rdata->ops;
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if (event == RPORT_EV_CREATED) {
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struct fc_rport *new_rport;
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struct fc_rport_libfc_priv *new_rdata;
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struct fc_rport_identifiers ids;
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ids.port_id = rport->port_id;
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ids.roles = rport->roles;
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ids.port_name = rport->port_name;
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ids.node_name = rport->node_name;
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mutex_unlock(&rdata->rp_mutex);
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new_rport = fc_remote_port_add(lport->host, 0, &ids);
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if (new_rport) {
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/*
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* Switch from the rogue rport to the rport
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* returned by the FC class.
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*/
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new_rport->maxframe_size = rport->maxframe_size;
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new_rdata = new_rport->dd_data;
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new_rdata->e_d_tov = rdata->e_d_tov;
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new_rdata->r_a_tov = rdata->r_a_tov;
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new_rdata->ops = rdata->ops;
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new_rdata->local_port = rdata->local_port;
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new_rdata->flags = FC_RP_FLAGS_REC_SUPPORTED;
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new_rdata->trans_state = FC_PORTSTATE_REAL;
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mutex_init(&new_rdata->rp_mutex);
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INIT_DELAYED_WORK(&new_rdata->retry_work,
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fc_rport_timeout);
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INIT_LIST_HEAD(&new_rdata->peers);
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INIT_WORK(&new_rdata->event_work, fc_rport_work);
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fc_rport_state_enter(new_rport, RPORT_ST_READY);
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} else {
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FC_DBG("Failed to create the rport for port "
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"(%6x).\n", ids.port_id);
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event = RPORT_EV_FAILED;
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}
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put_device(&rport->dev);
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rport = new_rport;
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rdata = new_rport->dd_data;
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if (rport_ops->event_callback)
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rport_ops->event_callback(lport, rport, event);
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} else if ((event == RPORT_EV_FAILED) ||
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(event == RPORT_EV_LOGO) ||
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(event == RPORT_EV_STOP)) {
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trans_state = rdata->trans_state;
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mutex_unlock(&rdata->rp_mutex);
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if (rport_ops->event_callback)
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rport_ops->event_callback(lport, rport, event);
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if (trans_state == FC_PORTSTATE_ROGUE)
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put_device(&rport->dev);
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else {
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port_id = rport->port_id;
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fc_remote_port_delete(rport);
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lport->tt.exch_mgr_reset(lport, 0, port_id);
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lport->tt.exch_mgr_reset(lport, port_id, 0);
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}
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} else
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mutex_unlock(&rdata->rp_mutex);
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}
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/**
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* fc_rport_login() - Start the remote port login state machine
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* @rport: Fibre Channel remote port
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*
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* Locking Note: Called without the rport lock held. This
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* function will hold the rport lock, call an _enter_*
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* function and then unlock the rport.
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*/
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int fc_rport_login(struct fc_rport *rport)
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{
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struct fc_rport_libfc_priv *rdata = rport->dd_data;
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mutex_lock(&rdata->rp_mutex);
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FC_DEBUG_RPORT("Login to port (%6x)\n", rport->port_id);
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fc_rport_enter_plogi(rport);
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mutex_unlock(&rdata->rp_mutex);
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return 0;
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}
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/**
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* fc_rport_logoff() - Logoff and remove an rport
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* @rport: Fibre Channel remote port to be removed
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*
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* Locking Note: Called without the rport lock held. This
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* function will hold the rport lock, call an _enter_*
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* function and then unlock the rport.
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*/
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int fc_rport_logoff(struct fc_rport *rport)
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{
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struct fc_rport_libfc_priv *rdata = rport->dd_data;
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mutex_lock(&rdata->rp_mutex);
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FC_DEBUG_RPORT("Remove port (%6x)\n", rport->port_id);
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fc_rport_enter_logo(rport);
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/*
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* Change the state to NONE so that we discard
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* the response.
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*/
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fc_rport_state_enter(rport, RPORT_ST_NONE);
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mutex_unlock(&rdata->rp_mutex);
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cancel_delayed_work_sync(&rdata->retry_work);
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mutex_lock(&rdata->rp_mutex);
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rdata->event = RPORT_EV_STOP;
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queue_work(rport_event_queue, &rdata->event_work);
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mutex_unlock(&rdata->rp_mutex);
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return 0;
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}
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/**
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* fc_rport_enter_ready() - The rport is ready
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* @rport: Fibre Channel remote port that is ready
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*
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* Locking Note: The rport lock is expected to be held before calling
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* this routine.
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*/
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static void fc_rport_enter_ready(struct fc_rport *rport)
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{
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struct fc_rport_libfc_priv *rdata = rport->dd_data;
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fc_rport_state_enter(rport, RPORT_ST_READY);
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FC_DEBUG_RPORT("Port (%6x) is Ready\n", rport->port_id);
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rdata->event = RPORT_EV_CREATED;
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queue_work(rport_event_queue, &rdata->event_work);
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}
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/**
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* fc_rport_timeout() - Handler for the retry_work timer.
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* @work: The work struct of the fc_rport_libfc_priv
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*
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* Locking Note: Called without the rport lock held. This
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* function will hold the rport lock, call an _enter_*
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* function and then unlock the rport.
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*/
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static void fc_rport_timeout(struct work_struct *work)
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{
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struct fc_rport_libfc_priv *rdata =
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container_of(work, struct fc_rport_libfc_priv, retry_work.work);
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struct fc_rport *rport = PRIV_TO_RPORT(rdata);
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mutex_lock(&rdata->rp_mutex);
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switch (rdata->rp_state) {
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case RPORT_ST_PLOGI:
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fc_rport_enter_plogi(rport);
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break;
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case RPORT_ST_PRLI:
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fc_rport_enter_prli(rport);
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break;
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case RPORT_ST_RTV:
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fc_rport_enter_rtv(rport);
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break;
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case RPORT_ST_LOGO:
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fc_rport_enter_logo(rport);
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break;
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case RPORT_ST_READY:
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case RPORT_ST_INIT:
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case RPORT_ST_NONE:
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break;
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}
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mutex_unlock(&rdata->rp_mutex);
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put_device(&rport->dev);
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}
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/**
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* fc_rport_error() - Error handler, called once retries have been exhausted
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* @rport: The fc_rport object
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* @fp: The frame pointer
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*
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* Locking Note: The rport lock is expected to be held before
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* calling this routine
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*/
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static void fc_rport_error(struct fc_rport *rport, struct fc_frame *fp)
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{
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struct fc_rport_libfc_priv *rdata = rport->dd_data;
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FC_DEBUG_RPORT("Error %ld in state %s, retries %d\n",
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PTR_ERR(fp), fc_rport_state(rport), rdata->retries);
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switch (rdata->rp_state) {
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case RPORT_ST_PLOGI:
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case RPORT_ST_PRLI:
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case RPORT_ST_LOGO:
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rdata->event = RPORT_EV_FAILED;
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queue_work(rport_event_queue,
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&rdata->event_work);
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break;
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case RPORT_ST_RTV:
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fc_rport_enter_ready(rport);
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break;
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case RPORT_ST_NONE:
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case RPORT_ST_READY:
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case RPORT_ST_INIT:
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break;
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}
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}
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/**
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* fc_rport_error_retry() - Error handler when retries are desired
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* @rport: The fc_rport object
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* @fp: The frame pointer
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*
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* If the error was an exchange timeout retry immediately,
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* otherwise wait for E_D_TOV.
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*
|
|
* 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);
|