9732e4fd92
(sys/dev/iscsi_initiator/ instead of sys/dev/iscsi/initiator/), to make room for the new one. This is also more logical location (kernel module being named iscsi_initiator.ko, for example). There is no ongoing work on this I know of, so it shouldn't make life harder for anyone. There are no functional changes, apart from "svn mv" and adjusting paths.
787 lines
18 KiB
C
787 lines
18 KiB
C
/*-
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* Copyright (c) 2005-2010 Daniel Braniss <danny@cs.huji.ac.il>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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/*
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| iSCSI - Session Manager
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| $Id: isc_sm.c 743 2009-08-08 10:54:53Z danny $
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_iscsi_initiator.h"
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/conf.h>
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#include <sys/systm.h>
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#include <sys/malloc.h>
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#include <sys/ctype.h>
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#include <sys/errno.h>
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#include <sys/sysctl.h>
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#include <sys/file.h>
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#include <sys/uio.h>
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#include <sys/socketvar.h>
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#include <sys/socket.h>
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#include <sys/protosw.h>
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#include <sys/proc.h>
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#include <sys/ioccom.h>
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#include <sys/queue.h>
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#include <sys/kthread.h>
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#include <sys/syslog.h>
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#include <sys/mbuf.h>
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#include <sys/bus.h>
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#include <sys/sx.h>
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#include <cam/cam.h>
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#include <cam/cam_ccb.h>
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#include <cam/cam_sim.h>
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#include <cam/cam_xpt_sim.h>
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#include <cam/cam_periph.h>
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#include <dev/iscsi_initiator/iscsi.h>
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#include <dev/iscsi_initiator/iscsivar.h>
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static void
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_async(isc_session_t *sp, pduq_t *pq)
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{
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debug_called(8);
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iscsi_async(sp, pq);
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pdu_free(sp->isc, pq);
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}
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static void
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_reject(isc_session_t *sp, pduq_t *pq)
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{
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pduq_t *opq;
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pdu_t *pdu;
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reject_t *reject;
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int itt;
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debug_called(8);
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pdu = mtod(pq->mp, pdu_t *);
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itt = pdu->ipdu.bhs.itt;
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reject = &pq->pdu.ipdu.reject;
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sdebug(2, "itt=%x reason=0x%x", ntohl(itt), reject->reason);
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opq = i_search_hld(sp, itt, 0);
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if(opq != NULL)
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iscsi_reject(sp, opq, pq);
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else {
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switch(pq->pdu.ipdu.bhs.opcode) {
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case ISCSI_LOGOUT_CMD: // XXX: wasabi does this - can't figure out why
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sdebug(2, "ISCSI_LOGOUT_CMD ...");
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break;
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default:
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xdebug("%d] we lost something itt=%x",
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sp->sid, ntohl(pq->pdu.ipdu.bhs.itt));
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}
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}
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pdu_free(sp->isc, pq);
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}
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static void
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_r2t(isc_session_t *sp, pduq_t *pq)
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{
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pduq_t *opq;
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debug_called(8);
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opq = i_search_hld(sp, pq->pdu.ipdu.bhs.itt, 1);
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if(opq != NULL) {
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iscsi_r2t(sp, opq, pq);
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}
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else {
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r2t_t *r2t = &pq->pdu.ipdu.r2t;
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xdebug("%d] we lost something itt=%x r2tSN=%d bo=%x ddtl=%x",
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sp->sid, ntohl(pq->pdu.ipdu.bhs.itt),
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ntohl(r2t->r2tSN), ntohl(r2t->bo), ntohl(r2t->ddtl));
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}
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pdu_free(sp->isc, pq);
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}
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static void
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_scsi_rsp(isc_session_t *sp, pduq_t *pq)
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{
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pduq_t *opq;
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debug_called(8);
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opq = i_search_hld(sp, pq->pdu.ipdu.bhs.itt, 0);
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debug(5, "itt=%x pq=%p opq=%p", ntohl(pq->pdu.ipdu.bhs.itt), pq, opq);
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if(opq != NULL) {
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iscsi_done(sp, opq, pq);
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i_acked_hld(sp, &pq->pdu);
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}
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else
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xdebug("%d] we lost something itt=%x",
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sp->sid, ntohl(pq->pdu.ipdu.bhs.itt));
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pdu_free(sp->isc, pq);
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}
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static void
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_read_data(isc_session_t *sp, pduq_t *pq)
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{
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pduq_t *opq;
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debug_called(8);
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opq = i_search_hld(sp, pq->pdu.ipdu.bhs.itt, 1);
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if(opq != NULL) {
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if(scsi_decap(sp, opq, pq) != 1) {
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i_remove_hld(sp, opq); // done
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pdu_free(sp->isc, opq);
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}
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}
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else
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xdebug("%d] we lost something itt=%x",
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sp->sid, ntohl(pq->pdu.ipdu.bhs.itt));
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pdu_free(sp->isc, pq);
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}
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/*
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| this is a kludge,
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| the jury is not back with a veredict, user or kernel
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*/
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static void
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_nop_out(isc_session_t *sp)
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{
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pduq_t *pq;
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nop_out_t *nop_out;
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debug_called(8);
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sdebug(4, "cws=%d", sp->cws);
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if(sp->cws == 0) {
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/*
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| only send a nop if window is closed.
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*/
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if((pq = pdu_alloc(sp->isc, M_NOWAIT)) == NULL)
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// I guess we ran out of resources
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return;
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nop_out = &pq->pdu.ipdu.nop_out;
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nop_out->opcode = ISCSI_NOP_OUT;
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nop_out->itt = htonl(sp->sn.itt);
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nop_out->ttt = -1;
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nop_out->I = 1;
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nop_out->F = 1;
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if(isc_qout(sp, pq) != 0) {
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sdebug(1, "failed");
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pdu_free(sp->isc, pq);
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}
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}
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}
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static void
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_nop_in(isc_session_t *sp, pduq_t *pq)
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{
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pdu_t *pp = &pq->pdu;
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nop_in_t *nop_in = &pp->ipdu.nop_in;
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bhs_t *bhs = &pp->ipdu.bhs;
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debug_called(8);
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sdebug(5, "itt=%x ttt=%x", htonl(nop_in->itt), htonl(nop_in->ttt));
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if(nop_in->itt == -1) {
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if(pp->ds_len != 0) {
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/*
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| according to RFC 3720 this should be zero
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| what to do if not?
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*/
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xdebug("%d] dslen not zero", sp->sid);
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}
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if(nop_in->ttt != -1) {
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nop_out_t *nop_out;
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/*
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| target wants a nop_out
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*/
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bhs->opcode = ISCSI_NOP_OUT;
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bhs->I = 1;
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bhs->F = 1;
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/*
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| we are reusing the pdu, so bhs->ttt == nop_in->ttt;
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| and need to zero out 'Reserved'
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| small cludge here.
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*/
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nop_out = &pp->ipdu.nop_out;
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nop_out->sn.maxcmd = 0;
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memset(nop_out->mbz, 0, sizeof(nop_out->mbz));
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(void)isc_qout(sp, pq); //XXX: should check return?
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return;
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}
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//else {
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// just making noise?
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// see 10.9.1: target does not want and answer.
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//}
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} else
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if(nop_in->ttt == -1) {
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/*
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| it is an answer to a nop_in from us
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*/
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if(nop_in->itt != -1) {
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#ifdef ISC_WAIT4PING
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// XXX: MUTEX please
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if(sp->flags & ISC_WAIT4PING) {
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i_nqueue_rsp(sp, pq);
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wakeup(&sp->rsp);
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return;
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}
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#endif
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}
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}
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/*
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| drop it
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*/
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pdu_free(sp->isc, pq);
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return;
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}
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int
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i_prepPDU(isc_session_t *sp, pduq_t *pq)
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{
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size_t len, n;
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pdu_t *pp = &pq->pdu;
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bhs_t *bhp = &pp->ipdu.bhs;
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len = sizeof(bhs_t);
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if(pp->ahs_len) {
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len += pp->ahs_len;
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bhp->AHSLength = pp->ahs_len / 4;
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}
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if(ISOK2DIG(sp->hdrDigest, pp))
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len += 4;
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if(pp->ds_len) {
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n = pp->ds_len;
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len += n;
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#if BYTE_ORDER == LITTLE_ENDIAN
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bhp->DSLength = ((n & 0x00ff0000) >> 16)
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| (n & 0x0000ff00)
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| ((n & 0x000000ff) << 16);
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#else
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bhp->DSLength = n;
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#endif
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if(len & 03) {
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n = 4 - (len & 03);
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len += n;
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}
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if(ISOK2DIG(sp->dataDigest, pp))
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len += 4;
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}
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pq->len = len;
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len -= sizeof(bhs_t);
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if(sp->opt.maxBurstLength && (len > sp->opt.maxBurstLength)) {
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xdebug("%d] pdu len=%zd > %d",
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sp->sid, len, sp->opt.maxBurstLength);
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// XXX: when this happens it used to hang ...
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return E2BIG;
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}
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return 0;
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}
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int
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isc_qout(isc_session_t *sp, pduq_t *pq)
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{
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int error = 0;
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debug_called(8);
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if(pq->len == 0 && (error = i_prepPDU(sp, pq)))
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return error;
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if(pq->pdu.ipdu.bhs.I)
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i_nqueue_isnd(sp, pq);
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else
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if(pq->pdu.ipdu.data_out.opcode == ISCSI_WRITE_DATA)
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i_nqueue_wsnd(sp, pq);
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else
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i_nqueue_csnd(sp, pq);
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sdebug(5, "enqued: pq=%p", pq);
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mtx_lock(&sp->io_mtx);
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sp->flags |= ISC_OQNOTEMPTY;
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if(sp->flags & ISC_OWAITING)
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wakeup(&sp->flags);
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mtx_unlock(&sp->io_mtx);
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return error;
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}
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/*
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| called when a fullPhase is restarted
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*/
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void
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ism_restart(isc_session_t *sp)
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{
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int lastcmd;
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sdebug(2, "restart ...");
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lastcmd = iscsi_requeue(sp);
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#if 0
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if(lastcmd != sp->sn.cmd) {
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sdebug(1, "resetting CmdSN to=%d (from %d)", lastcmd, sp->sn.cmd);
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sp->sn.cmd = lastcmd;
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}
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#endif
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mtx_lock(&sp->io_mtx);
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if(sp->flags & ISC_OWAITING) {
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wakeup(&sp->flags);
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}
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mtx_unlock(&sp->io_mtx);
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sdebug(2, "restarted sn.cmd=0x%x lastcmd=0x%x", sp->sn.cmd, lastcmd);
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}
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void
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ism_recv(isc_session_t *sp, pduq_t *pq)
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{
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bhs_t *bhs;
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int statSN;
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debug_called(8);
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bhs = &pq->pdu.ipdu.bhs;
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statSN = ntohl(bhs->OpcodeSpecificFields[1]);
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#ifdef notyet
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if(sp->sn.expCmd != sn->cmd) {
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sdebug(1, "we lost something ... exp=0x%x cmd=0x%x",
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sn->expCmd, sn->cmd);
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}
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#endif
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sdebug(5, "opcode=0x%x itt=0x%x stat#0x%x maxcmd=0x%0x",
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bhs->opcode, ntohl(bhs->itt), statSN, sp->sn.maxCmd);
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switch(bhs->opcode) {
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case ISCSI_READ_DATA: {
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data_in_t *cmd = &pq->pdu.ipdu.data_in;
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if(cmd->S == 0)
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break;
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}
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|
default:
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if(statSN > (sp->sn.stat + 1)) {
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sdebug(1, "we lost some rec=0x%x exp=0x%x",
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statSN, sp->sn.stat);
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// XXX: must do some error recovery here.
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}
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sp->sn.stat = statSN;
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}
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|
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switch(bhs->opcode) {
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case ISCSI_LOGIN_RSP:
|
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case ISCSI_TEXT_RSP:
|
|
case ISCSI_LOGOUT_RSP:
|
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i_nqueue_rsp(sp, pq);
|
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wakeup(&sp->rsp);
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sdebug(3, "wakeup rsp");
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break;
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|
case ISCSI_NOP_IN: _nop_in(sp, pq); break;
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case ISCSI_SCSI_RSP: _scsi_rsp(sp, pq); break;
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case ISCSI_READ_DATA: _read_data(sp, pq); break;
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case ISCSI_R2T: _r2t(sp, pq); break;
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case ISCSI_REJECT: _reject(sp, pq); break;
|
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case ISCSI_ASYNC: _async(sp, pq); break;
|
|
|
|
case ISCSI_TASK_RSP:
|
|
default:
|
|
sdebug(1, "opcode=0x%x itt=0x%x not implemented yet",
|
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bhs->opcode, ntohl(bhs->itt));
|
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break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
| go through the out queues looking for work
|
|
| if either nothing to do, or window is closed
|
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| return.
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|
*/
|
|
static int
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|
proc_out(isc_session_t *sp)
|
|
{
|
|
sn_t *sn = &sp->sn;
|
|
pduq_t *pq;
|
|
int error, which;
|
|
|
|
debug_called(8);
|
|
error = 0;
|
|
|
|
while(sp->flags & ISC_LINK_UP) {
|
|
pdu_t *pp;
|
|
bhs_t *bhs;
|
|
/*
|
|
| check if there is outstanding work in:
|
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| 1- the Immediate queue
|
|
| 2- the R2T queue
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| 3- the cmd queue, only if the command window allows it.
|
|
*/
|
|
which = BIT(0) | BIT(1);
|
|
if(SNA_GT(sn->cmd, sn->maxCmd) == 0) // if(sn->maxCmd - sn->smc + 1) > 0
|
|
which |= BIT(2);
|
|
|
|
sdebug(4, "which=%d sn->maxCmd=%d sn->cmd=%d", which, sn->maxCmd, sn->cmd);
|
|
|
|
if((pq = i_dqueue_snd(sp, which)) == NULL)
|
|
break;
|
|
sdebug(4, "pq=%p", pq);
|
|
|
|
pp = &pq->pdu;
|
|
bhs = &pp->ipdu.bhs;
|
|
switch(bhs->opcode) {
|
|
case ISCSI_SCSI_CMD:
|
|
sn->itt++;
|
|
bhs->itt = htonl(sn->itt);
|
|
|
|
case ISCSI_LOGIN_CMD:
|
|
case ISCSI_TEXT_CMD:
|
|
case ISCSI_LOGOUT_CMD:
|
|
case ISCSI_SNACK:
|
|
case ISCSI_NOP_OUT:
|
|
case ISCSI_TASK_CMD:
|
|
bhs->CmdSN = htonl(sn->cmd);
|
|
if(bhs->I == 0)
|
|
sn->cmd++;
|
|
|
|
case ISCSI_WRITE_DATA:
|
|
bhs->ExpStSN = htonl(sn->stat + 1);
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|
break;
|
|
|
|
default:
|
|
// XXX: can this happen?
|
|
xdebug("bad opcode=0x%x sn(cmd=0x%x expCmd=0x%x maxCmd=0x%x expStat=0x%x itt=0x%x)",
|
|
bhs->opcode,
|
|
sn->cmd, sn->expCmd, sn->maxCmd, sn->expStat, sn->itt);
|
|
// XXX: and now?
|
|
}
|
|
|
|
sdebug(4, "opcode=0x%x sn(cmd=0x%x expCmd=0x%x maxCmd=0x%x expStat=0x%x itt=0x%x)",
|
|
bhs->opcode,
|
|
sn->cmd, sn->expCmd, sn->maxCmd, sn->expStat, sn->itt);
|
|
|
|
if(bhs->opcode != ISCSI_NOP_OUT)
|
|
/*
|
|
| enqued till ack is received
|
|
| note: sosend(...) does not mean the packet left
|
|
| the host so that freeing resources has to wait
|
|
*/
|
|
i_nqueue_hld(sp, pq);
|
|
|
|
error = isc_sendPDU(sp, pq);
|
|
if(bhs->opcode == ISCSI_NOP_OUT)
|
|
pdu_free(sp->isc, pq);
|
|
if(error) {
|
|
xdebug("error=%d opcode=0x%x ccb=%p itt=%x",
|
|
error, bhs->opcode, pq->ccb, ntohl(bhs->itt));
|
|
i_remove_hld(sp, pq);
|
|
switch(error) {
|
|
case EPIPE:
|
|
sp->flags &= ~ISC_LINK_UP;
|
|
|
|
case EAGAIN:
|
|
xdebug("requed");
|
|
i_rqueue_pdu(sp, pq);
|
|
break;
|
|
|
|
default:
|
|
if(pq->ccb) {
|
|
xdebug("back to cam");
|
|
pq->ccb->ccb_h.status |= CAM_REQUEUE_REQ; // some better error?
|
|
XPT_DONE(sp, pq->ccb);
|
|
pdu_free(sp->isc, pq);
|
|
}
|
|
else
|
|
xdebug("we lost it!");
|
|
}
|
|
}
|
|
}
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
| survives link breakdowns.
|
|
*/
|
|
static void
|
|
ism_out(void *vp)
|
|
{
|
|
isc_session_t *sp = (isc_session_t *)vp;
|
|
int error;
|
|
|
|
debug_called(8);
|
|
|
|
sp->flags |= ISC_SM_RUNNING;
|
|
sdebug(3, "started sp->flags=%x", sp->flags);
|
|
do {
|
|
if((sp->flags & ISC_HOLD) == 0) {
|
|
error = proc_out(sp);
|
|
if(error) {
|
|
sdebug(3, "error=%d", error);
|
|
}
|
|
}
|
|
mtx_lock(&sp->io_mtx);
|
|
if((sp->flags & ISC_LINK_UP) == 0) {
|
|
sdebug(3, "ISC_LINK_UP==0, sp->flags=%x ", sp->flags);
|
|
if(sp->soc != NULL)
|
|
sdebug(3, "so_state=%x", sp->soc->so_state);
|
|
wakeup(&sp->soc);
|
|
}
|
|
|
|
if(!(sp->flags & ISC_OQNOTEMPTY)) {
|
|
sp->flags |= ISC_OWAITING;
|
|
if(msleep(&sp->flags, &sp->io_mtx, PRIBIO, "isc_proc", hz*30) == EWOULDBLOCK) {
|
|
if(sp->flags & ISC_CON_RUNNING)
|
|
_nop_out(sp);
|
|
}
|
|
sp->flags &= ~ISC_OWAITING;
|
|
}
|
|
sp->flags &= ~ISC_OQNOTEMPTY;
|
|
mtx_unlock(&sp->io_mtx);
|
|
} while(sp->flags & ISC_SM_RUN);
|
|
|
|
sp->flags &= ~ISC_SM_RUNNING;
|
|
sdebug(3, "dropped ISC_SM_RUNNING");
|
|
|
|
wakeup(&sp->soc);
|
|
wakeup(sp); // XXX: do we need this one?
|
|
|
|
#if __FreeBSD_version >= 700000
|
|
destroy_dev(sp->dev);
|
|
#endif
|
|
|
|
debug(3, "terminated sp=%p sp->sid=%d", sp, sp->sid);
|
|
|
|
#if __FreeBSD_version >= 800000
|
|
kproc_exit(0);
|
|
#else
|
|
kthread_exit(0);
|
|
#endif
|
|
}
|
|
|
|
#if 0
|
|
static int
|
|
isc_dump_options(SYSCTL_HANDLER_ARGS)
|
|
{
|
|
int error;
|
|
isc_session_t *sp;
|
|
char buf[1024], *bp;
|
|
|
|
sp = (isc_session_t *)arg1;
|
|
bp = buf;
|
|
sprintf(bp, "targetname='%s'", sp->opt.targetName);
|
|
bp += strlen(bp);
|
|
sprintf(bp, " targetname='%s'", sp->opt.targetAddress);
|
|
error = SYSCTL_OUT(req, buf, strlen(buf));
|
|
return error;
|
|
}
|
|
#endif
|
|
|
|
static int
|
|
isc_dump_stats(SYSCTL_HANDLER_ARGS)
|
|
{
|
|
isc_session_t *sp;
|
|
struct isc_softc *sc;
|
|
char buf[1024], *bp;
|
|
int error, n;
|
|
|
|
sp = (isc_session_t *)arg1;
|
|
sc = sp->isc;
|
|
|
|
bp = buf;
|
|
n = sizeof(buf);
|
|
snprintf(bp, n, "recv=%d sent=%d", sp->stats.nrecv, sp->stats.nsent);
|
|
bp += strlen(bp);
|
|
n -= strlen(bp);
|
|
snprintf(bp, n, " flags=0x%08x pdus-alloc=%d pdus-max=%d",
|
|
sp->flags, sc->npdu_alloc, sc->npdu_max);
|
|
bp += strlen(bp);
|
|
n -= strlen(bp);
|
|
snprintf(bp, n, " cws=%d cmd=%x exp=%x max=%x stat=%x itt=%x",
|
|
sp->cws, sp->sn.cmd, sp->sn.expCmd, sp->sn.maxCmd, sp->sn.stat, sp->sn.itt);
|
|
error = SYSCTL_OUT(req, buf, strlen(buf));
|
|
return error;
|
|
}
|
|
|
|
static int
|
|
isc_sysctl_targetName(SYSCTL_HANDLER_ARGS)
|
|
{
|
|
char buf[128], **cp;
|
|
int error;
|
|
|
|
cp = (char **)arg1;
|
|
snprintf(buf, sizeof(buf), "%s", *cp);
|
|
error = SYSCTL_OUT(req, buf, strlen(buf));
|
|
return error;
|
|
}
|
|
|
|
static int
|
|
isc_sysctl_targetAddress(SYSCTL_HANDLER_ARGS)
|
|
{
|
|
char buf[128], **cp;
|
|
int error;
|
|
|
|
cp = (char **)arg1;
|
|
snprintf(buf, sizeof(buf), "%s", *cp);
|
|
error = SYSCTL_OUT(req, buf, strlen(buf));
|
|
return error;
|
|
}
|
|
|
|
static void
|
|
isc_add_sysctls(isc_session_t *sp)
|
|
{
|
|
debug_called(8);
|
|
sdebug(6, "sid=%d %s", sp->sid, devtoname(sp->dev));
|
|
|
|
sysctl_ctx_init(&sp->clist);
|
|
sp->oid = SYSCTL_ADD_NODE(&sp->clist,
|
|
SYSCTL_CHILDREN(sp->isc->oid),
|
|
OID_AUTO,
|
|
devtoname(sp->dev) + 5, // iscsi0
|
|
CTLFLAG_RD,
|
|
0,
|
|
"initiator");
|
|
SYSCTL_ADD_PROC(&sp->clist,
|
|
SYSCTL_CHILDREN(sp->oid),
|
|
OID_AUTO,
|
|
"targetname",
|
|
CTLTYPE_STRING | CTLFLAG_RD,
|
|
(void *)&sp->opt.targetName, 0,
|
|
isc_sysctl_targetName, "A", "target name");
|
|
|
|
SYSCTL_ADD_PROC(&sp->clist,
|
|
SYSCTL_CHILDREN(sp->oid),
|
|
OID_AUTO,
|
|
"targeaddress",
|
|
CTLTYPE_STRING | CTLFLAG_RD,
|
|
(void *)&sp->opt.targetAddress, 0,
|
|
isc_sysctl_targetAddress, "A", "target address");
|
|
|
|
SYSCTL_ADD_PROC(&sp->clist,
|
|
SYSCTL_CHILDREN(sp->oid),
|
|
OID_AUTO,
|
|
"stats",
|
|
CTLTYPE_STRING | CTLFLAG_RD,
|
|
(void *)sp, 0,
|
|
isc_dump_stats, "A", "statistics");
|
|
|
|
SYSCTL_ADD_INT(&sp->clist,
|
|
SYSCTL_CHILDREN(sp->oid),
|
|
OID_AUTO,
|
|
"douio",
|
|
CTLFLAG_RW,
|
|
&sp->douio, 0, "enable uio on read");
|
|
}
|
|
|
|
void
|
|
ism_stop(isc_session_t *sp)
|
|
{
|
|
struct isc_softc *sc = sp->isc;
|
|
int n;
|
|
|
|
debug_called(8);
|
|
sdebug(2, "terminating");
|
|
/*
|
|
| first stop the receiver
|
|
*/
|
|
isc_stop_receiver(sp);
|
|
/*
|
|
| now stop the xmitter
|
|
*/
|
|
n = 5;
|
|
sp->flags &= ~ISC_SM_RUN;
|
|
while(n-- && (sp->flags & ISC_SM_RUNNING)) {
|
|
sdebug(2, "n=%d", n);
|
|
wakeup(&sp->flags);
|
|
tsleep(sp, PRIBIO, "-", 5*hz);
|
|
}
|
|
sdebug(2, "final n=%d", n);
|
|
sp->flags &= ~ISC_FFPHASE;
|
|
|
|
iscsi_cleanup(sp);
|
|
|
|
(void)i_pdu_flush(sp);
|
|
|
|
ic_destroy(sp);
|
|
|
|
sx_xlock(&sc->unit_sx);
|
|
free_unr(sc->unit, sp->sid);
|
|
sx_xunlock(&sc->unit_sx);
|
|
|
|
mtx_lock(&sc->isc_mtx);
|
|
TAILQ_REMOVE(&sc->isc_sess, sp, sp_link);
|
|
sc->nsess--;
|
|
mtx_unlock(&sc->isc_mtx);
|
|
|
|
#if __FreeBSD_version < 700000
|
|
destroy_dev(sp->dev);
|
|
#endif
|
|
|
|
mtx_destroy(&sp->rsp_mtx);
|
|
mtx_destroy(&sp->rsv_mtx);
|
|
mtx_destroy(&sp->hld_mtx);
|
|
mtx_destroy(&sp->snd_mtx);
|
|
mtx_destroy(&sp->io_mtx);
|
|
|
|
i_freeopt(&sp->opt);
|
|
|
|
if(sysctl_ctx_free(&sp->clist))
|
|
xdebug("sysctl_ctx_free failed");
|
|
|
|
free(sp, M_ISCSI);
|
|
}
|
|
|
|
int
|
|
ism_start(isc_session_t *sp)
|
|
{
|
|
debug_called(8);
|
|
/*
|
|
| now is a good time to do some initialization
|
|
*/
|
|
TAILQ_INIT(&sp->rsp);
|
|
TAILQ_INIT(&sp->rsv);
|
|
TAILQ_INIT(&sp->csnd);
|
|
TAILQ_INIT(&sp->isnd);
|
|
TAILQ_INIT(&sp->wsnd);
|
|
TAILQ_INIT(&sp->hld);
|
|
|
|
mtx_init(&sp->rsv_mtx, "iscsi-rsv", NULL, MTX_DEF);
|
|
mtx_init(&sp->rsp_mtx, "iscsi-rsp", NULL, MTX_DEF);
|
|
mtx_init(&sp->snd_mtx, "iscsi-snd", NULL, MTX_DEF);
|
|
mtx_init(&sp->hld_mtx, "iscsi-hld", NULL, MTX_DEF);
|
|
mtx_init(&sp->io_mtx, "iscsi-io", NULL, MTX_DEF);
|
|
|
|
isc_add_sysctls(sp);
|
|
|
|
sp->flags |= ISC_SM_RUN;
|
|
|
|
debug(4, "starting ism_proc: sp->sid=%d", sp->sid);
|
|
|
|
#if __FreeBSD_version >= 800000
|
|
return kproc_create(ism_out, sp, &sp->stp, 0, 0, "isc_out %d", sp->sid);
|
|
#else
|
|
return kthread_create(ism_out, sp, &sp->stp, 0, 0, "isc_out %d", sp->sid);
|
|
#endif
|
|
}
|