51d643caa6
to kproc_xxx as they actually make whole processes. Thos makes way for us to add REAL kthread_create() and friends that actually make theads. it turns out that most of these calls actually end up being moved back to the thread version when it's added. but we need to make this cosmetic change first. I'd LOVE to do this rename in 7.0 so that we can eventually MFC the new kthread_xxx() calls.
787 lines
18 KiB
C
787 lines
18 KiB
C
/*-
|
||
* Copyright (c) 2005-2007 Daniel Braniss <danny@cs.huji.ac.il>
|
||
* All rights reserved.
|
||
*
|
||
* Redistribution and use in source and binary forms, with or without
|
||
* modification, are permitted provided that the following conditions
|
||
* are met:
|
||
* 1. Redistributions of source code must retain the above copyright
|
||
* notice, this list of conditions and the following disclaimer.
|
||
* 2. Redistributions in binary form must reproduce the above copyright
|
||
* notice, this list of conditions and the following disclaimer in the
|
||
* documentation and/or other materials provided with the distribution.
|
||
*
|
||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
||
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
||
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||
* SUCH DAMAGE.
|
||
*
|
||
*/
|
||
/*
|
||
| iSCSI - Session Manager
|
||
| $Id: isc_sm.c,v 1.30 2007/04/22 09:53:09 danny Exp danny $
|
||
*/
|
||
|
||
#include <sys/cdefs.h>
|
||
__FBSDID("$FreeBSD$");
|
||
|
||
#include "opt_iscsi_initiator.h"
|
||
|
||
#include <sys/param.h>
|
||
#include <sys/kernel.h>
|
||
#include <sys/conf.h>
|
||
#include <sys/systm.h>
|
||
#include <sys/malloc.h>
|
||
#include <sys/ctype.h>
|
||
#include <sys/errno.h>
|
||
#include <sys/sysctl.h>
|
||
#include <sys/file.h>
|
||
#include <sys/uio.h>
|
||
#include <sys/socketvar.h>
|
||
#include <sys/socket.h>
|
||
#include <sys/protosw.h>
|
||
#include <sys/proc.h>
|
||
#include <sys/ioccom.h>
|
||
#include <sys/queue.h>
|
||
#include <sys/kthread.h>
|
||
#include <sys/syslog.h>
|
||
#include <sys/mbuf.h>
|
||
#include <sys/bus.h>
|
||
|
||
#include <cam/cam.h>
|
||
#include <cam/cam_ccb.h>
|
||
#include <cam/cam_sim.h>
|
||
#include <cam/cam_xpt_sim.h>
|
||
#include <cam/cam_periph.h>
|
||
|
||
#include <dev/iscsi/initiator/iscsi.h>
|
||
#include <dev/iscsi/initiator/iscsivar.h>
|
||
|
||
static void
|
||
_async(isc_session_t *sp, pduq_t *pq)
|
||
{
|
||
debug_called(8);
|
||
|
||
iscsi_async(sp, pq);
|
||
|
||
pdu_free(sp->isc, pq);
|
||
}
|
||
|
||
static void
|
||
_reject(isc_session_t *sp, pduq_t *pq)
|
||
{
|
||
pduq_t *opq;
|
||
pdu_t *pdu;
|
||
reject_t *reject;
|
||
int itt;
|
||
|
||
debug_called(8);
|
||
pdu = mtod(pq->mp, pdu_t *);
|
||
itt = pdu->ipdu.bhs.itt;
|
||
reject = &pq->pdu.ipdu.reject;
|
||
sdebug(2, "itt=%x reason=0x%x", ntohl(itt), reject->reason);
|
||
opq = i_search_hld(sp, itt, 0);
|
||
if(opq != NULL)
|
||
iscsi_reject(sp, opq, pq);
|
||
else {
|
||
switch(pq->pdu.ipdu.bhs.opcode) {
|
||
case ISCSI_LOGOUT_CMD: // XXX: wasabi does this - can't figure out why
|
||
sdebug(2, "ISCSI_LOGOUT_CMD ...");
|
||
break;
|
||
default:
|
||
xdebug("%d] we lost something itt=%x",
|
||
sp->sid, ntohl(pq->pdu.ipdu.bhs.itt));
|
||
}
|
||
}
|
||
pdu_free(sp->isc, pq);
|
||
}
|
||
|
||
static void
|
||
_r2t(isc_session_t *sp, pduq_t *pq)
|
||
{
|
||
pduq_t *opq;
|
||
|
||
debug_called(8);
|
||
opq = i_search_hld(sp, pq->pdu.ipdu.bhs.itt, 1);
|
||
if(opq != NULL) {
|
||
iscsi_r2t(sp, opq, pq);
|
||
}
|
||
else {
|
||
r2t_t *r2t = &pq->pdu.ipdu.r2t;
|
||
|
||
xdebug("%d] we lost something itt=%x r2tSN=%d bo=%x ddtl=%x",
|
||
sp->sid, ntohl(pq->pdu.ipdu.bhs.itt),
|
||
ntohl(r2t->r2tSN), ntohl(r2t->bo), ntohl(r2t->ddtl));
|
||
}
|
||
pdu_free(sp->isc, pq);
|
||
}
|
||
|
||
static void
|
||
_scsi_rsp(isc_session_t *sp, pduq_t *pq)
|
||
{
|
||
pduq_t *opq;
|
||
|
||
debug_called(8);
|
||
opq = i_search_hld(sp, pq->pdu.ipdu.bhs.itt, 0);
|
||
debug(5, "itt=%x pq=%p opq=%p", ntohl(pq->pdu.ipdu.bhs.itt), pq, opq);
|
||
if(opq != NULL)
|
||
iscsi_done(sp, opq, pq);
|
||
else
|
||
xdebug("%d] we lost something itt=%x",
|
||
sp->sid, ntohl(pq->pdu.ipdu.bhs.itt));
|
||
pdu_free(sp->isc, pq);
|
||
}
|
||
|
||
static void
|
||
_read_data(isc_session_t *sp, pduq_t *pq)
|
||
{
|
||
pduq_t *opq;
|
||
|
||
debug_called(8);
|
||
opq = i_search_hld(sp, pq->pdu.ipdu.bhs.itt, 1);
|
||
if(opq != NULL) {
|
||
if(scsi_decap(sp, opq, pq) != 1) {
|
||
i_remove_hld(sp, opq); // done
|
||
pdu_free(sp->isc, opq);
|
||
}
|
||
}
|
||
else
|
||
xdebug("%d] we lost something itt=%x",
|
||
sp->sid, ntohl(pq->pdu.ipdu.bhs.itt));
|
||
pdu_free(sp->isc, pq);
|
||
}
|
||
/*
|
||
| this is a kludge,
|
||
| the jury is not back with a veredict, user or kernel
|
||
*/
|
||
static void
|
||
_nop_out(isc_session_t *sp)
|
||
{
|
||
pduq_t *pq;
|
||
nop_out_t *nop_out;
|
||
|
||
debug_called(8);
|
||
|
||
sdebug(4, "cws=%d", sp->cws);
|
||
if(sp->cws == 0) {
|
||
/*
|
||
| only send a nop if window is closed.
|
||
*/
|
||
if((pq = pdu_alloc(sp->isc, 0)) == NULL)
|
||
// I guess we ran out of resources
|
||
return;
|
||
nop_out = &pq->pdu.ipdu.nop_out;
|
||
nop_out->opcode = ISCSI_NOP_OUT;
|
||
nop_out->itt = htonl(sp->sn.itt);
|
||
nop_out->ttt = -1;
|
||
nop_out->I = 1;
|
||
nop_out->F = 1;
|
||
if(isc_qout(sp, pq) != 0) {
|
||
sdebug(1, "failed");
|
||
pdu_free(sp->isc, pq);
|
||
}
|
||
}
|
||
}
|
||
|
||
static void
|
||
_nop_in(isc_session_t *sp, pduq_t *pq)
|
||
{
|
||
pdu_t *pp = &pq->pdu;
|
||
nop_in_t *nop_in = &pp->ipdu.nop_in;
|
||
bhs_t *bhs = &pp->ipdu.bhs;
|
||
|
||
debug_called(8);
|
||
|
||
sdebug(5, "itt=%x ttt=%x", htonl(nop_in->itt), htonl(nop_in->ttt));
|
||
if(nop_in->itt == -1) {
|
||
if(pp->ds_len != 0) {
|
||
/*
|
||
| according to RFC 3720 this should be zero
|
||
| what to do if not?
|
||
*/
|
||
xdebug("%d] dslen not zero", sp->sid);
|
||
}
|
||
if(nop_in->ttt != -1) {
|
||
nop_out_t *nop_out;
|
||
/*
|
||
| target wants a nop_out
|
||
*/
|
||
bhs->opcode = ISCSI_NOP_OUT;
|
||
bhs->I = 1;
|
||
bhs->F = 1;
|
||
/*
|
||
| we are reusing the pdu, so bhs->ttt == nop_in->ttt;
|
||
| and need to zero out 'Reserved'
|
||
| small cludge here.
|
||
*/
|
||
nop_out = &pp->ipdu.nop_out;
|
||
nop_out->sn.maxcmd = 0;
|
||
memset(nop_out->mbz, 0, sizeof(nop_out->mbz));
|
||
|
||
(void)isc_qout(sp, pq); //XXX: should check return?
|
||
return;
|
||
}
|
||
//else {
|
||
// just making noise?
|
||
// see 10.9.1: target does not want and answer.
|
||
//}
|
||
|
||
} else
|
||
if(nop_in->ttt == -1) {
|
||
/*
|
||
| it is an answer to a nop_in from us
|
||
*/
|
||
if(nop_in->itt != -1) {
|
||
#ifdef ISC_WAIT4PING
|
||
// XXX: MUTEX please
|
||
if(sp->flags & ISC_WAIT4PING) {
|
||
i_nqueue_rsp(sp, pq);
|
||
wakeup(&sp->rsp);
|
||
return;
|
||
}
|
||
#endif
|
||
}
|
||
}
|
||
/*
|
||
| drop it
|
||
*/
|
||
pdu_free(sp->isc, pq);
|
||
return;
|
||
}
|
||
|
||
int
|
||
i_prepPDU(isc_session_t *sp, pduq_t *pq)
|
||
{
|
||
size_t len, n;
|
||
pdu_t *pp = &pq->pdu;
|
||
bhs_t *bhp = &pp->ipdu.bhs;
|
||
|
||
len = sizeof(bhs_t);
|
||
if(pp->ahs_len) {
|
||
len += pp->ahs_len;
|
||
bhp->AHSLength = pp->ahs_len / 4;
|
||
}
|
||
if(sp->hdrDigest)
|
||
len += 4;
|
||
if(pp->ds_len) {
|
||
n = pp->ds_len;
|
||
len += n;
|
||
#if BYTE_ORDER == LITTLE_ENDIAN
|
||
bhp->DSLength = ((n & 0x00ff0000) >> 16)
|
||
| (n & 0x0000ff00)
|
||
| ((n & 0x000000ff) << 16);
|
||
#else
|
||
bhp->DSLength = n;
|
||
#endif
|
||
if(len & 03) {
|
||
n = 4 - (len & 03);
|
||
len += n;
|
||
}
|
||
if(sp->dataDigest)
|
||
len += 4;
|
||
}
|
||
|
||
pq->len = len;
|
||
len -= sizeof(bhs_t);
|
||
if(sp->opt.maxBurstLength && (len > sp->opt.maxBurstLength)) {
|
||
xdebug("%d] pdu len=%zd > %d",
|
||
sp->sid, len, sp->opt.maxBurstLength);
|
||
// XXX: when this happens it used to hang ...
|
||
return E2BIG;
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
int
|
||
isc_qout(isc_session_t *sp, pduq_t *pq)
|
||
{
|
||
int error = 0;
|
||
|
||
debug_called(8);
|
||
|
||
if(pq->len == 0 && (error = i_prepPDU(sp, pq)))
|
||
return error;
|
||
|
||
if(pq->pdu.ipdu.bhs.I)
|
||
i_nqueue_isnd(sp, pq);
|
||
else
|
||
if(pq->pdu.ipdu.data_out.opcode == ISCSI_WRITE_DATA)
|
||
i_nqueue_wsnd(sp, pq);
|
||
else
|
||
i_nqueue_csnd(sp, pq);
|
||
|
||
sdebug(5, "enqued: pq=%p", pq);
|
||
#ifdef ISC_OWAITING
|
||
if(sp->flags & ISC_OWAITING) {
|
||
mtx_lock(&sp->io_mtx); // XXX
|
||
wakeup(&sp->flags);
|
||
mtx_unlock(&sp->io_mtx); // XXX
|
||
}
|
||
#else
|
||
wakeup(&sp->flags);
|
||
#endif
|
||
return error;
|
||
}
|
||
/*
|
||
| called when a fullPhase is restarted
|
||
*/
|
||
static int
|
||
ism_restart(isc_session_t *sp)
|
||
{
|
||
int lastcmd;
|
||
|
||
sdebug(2, "restart ...");
|
||
sp->flags |= ISC_SM_HOLD;
|
||
lastcmd = iscsi_requeue(sp);
|
||
#if 0
|
||
if(lastcmd != sp->sn.cmd) {
|
||
sdebug(1, "resetting CmdSN to=%d (from %d)", lastcmd, sp->sn.cmd);
|
||
sp->sn.cmd = lastcmd;
|
||
}
|
||
#endif
|
||
sp->flags &= ~ISC_SM_HOLD;
|
||
return 0;
|
||
}
|
||
|
||
int
|
||
ism_fullfeature(struct cdev *dev, int flag)
|
||
{
|
||
isc_session_t *sp = (isc_session_t *)dev->si_drv2;
|
||
int error;
|
||
|
||
sdebug(2, "flag=%d", flag);
|
||
|
||
error = 0;
|
||
switch(flag) {
|
||
case 0: // stop
|
||
sp->flags &= ~ISC_FFPHASE;
|
||
break;
|
||
case 1: // start
|
||
error = ic_fullfeature(dev);
|
||
break;
|
||
case 2: // restart
|
||
error = ism_restart(sp);
|
||
break;
|
||
}
|
||
return error;
|
||
}
|
||
|
||
void
|
||
ism_recv(isc_session_t *sp, pduq_t *pq)
|
||
{
|
||
bhs_t *bhs;
|
||
int statSN;
|
||
|
||
debug_called(8);
|
||
|
||
bhs = &pq->pdu.ipdu.bhs;
|
||
statSN = ntohl(bhs->OpcodeSpecificFields[1]);
|
||
#if 0
|
||
{
|
||
/*
|
||
| this code is only for debugging.
|
||
*/
|
||
sn_t *sn = &sp->sn;
|
||
if(sp->cws == 0) {
|
||
if((sp->flags & ISC_STALLED) == 0) {
|
||
sdebug(4, "window closed: max=0x%x exp=0x%x opcode=0x%x cmd=0x%x cws=%d.",
|
||
sn->maxCmd, sn->expCmd, bhs->opcode, sn->cmd, sp->cws);
|
||
sp->flags |= ISC_STALLED;
|
||
} else
|
||
if(sp->flags & ISC_STALLED) {
|
||
sdebug(4, "window opened: max=0x%x exp=0x%x opcode=0x%x cmd=0x%x cws=%d.",
|
||
sn->maxCmd, sn->expCmd, bhs->opcode, sn->cmd, sp->cws);
|
||
sp->flags &= ~ISC_STALLED;;
|
||
}
|
||
}
|
||
}
|
||
#endif
|
||
|
||
#ifdef notyet
|
||
if(sp->sn.expCmd != sn->cmd) {
|
||
sdebug(1, "we lost something ... exp=0x%x cmd=0x%x",
|
||
sn->expCmd, sn->cmd);
|
||
}
|
||
#endif
|
||
sdebug(5, "opcode=0x%x itt=0x%x stat#0x%x maxcmd=0x%0x",
|
||
bhs->opcode, ntohl(bhs->itt), statSN, sp->sn.maxCmd);
|
||
|
||
switch(bhs->opcode) {
|
||
case ISCSI_READ_DATA: {
|
||
data_in_t *cmd = &pq->pdu.ipdu.data_in;
|
||
|
||
if(cmd->S == 0)
|
||
break;
|
||
}
|
||
|
||
default:
|
||
if(statSN > (sp->sn.stat + 1)) {
|
||
sdebug(1, "we lost some rec=0x%x exp=0x%x",
|
||
statSN, sp->sn.stat);
|
||
// XXX: must do some error recovery here.
|
||
}
|
||
sp->sn.stat = statSN;
|
||
}
|
||
|
||
switch(bhs->opcode) {
|
||
case ISCSI_LOGIN_RSP:
|
||
case ISCSI_TEXT_RSP:
|
||
case ISCSI_LOGOUT_RSP:
|
||
i_nqueue_rsp(sp, pq);
|
||
wakeup(&sp->rsp);
|
||
sdebug(3, "wakeup rsp");
|
||
break;
|
||
|
||
case ISCSI_NOP_IN: _nop_in(sp, pq); break;
|
||
case ISCSI_SCSI_RSP: _scsi_rsp(sp, pq); break;
|
||
case ISCSI_READ_DATA: _read_data(sp, pq); break;
|
||
case ISCSI_R2T: _r2t(sp, pq); break;
|
||
case ISCSI_REJECT: _reject(sp, pq); break;
|
||
case ISCSI_ASYNC: _async(sp, pq); break;
|
||
|
||
case ISCSI_TASK_RSP:
|
||
default:
|
||
sdebug(1, "opcode=0x%x itt=0x%x not implemented yet",
|
||
bhs->opcode, ntohl(bhs->itt));
|
||
break;
|
||
}
|
||
}
|
||
|
||
static int
|
||
proc_out(isc_session_t *sp)
|
||
{
|
||
sn_t *sn = &sp->sn;
|
||
pduq_t *pq;
|
||
int error, ndone = 0;
|
||
int which;
|
||
|
||
debug_called(8);
|
||
|
||
while(1) {
|
||
pdu_t *pp;
|
||
bhs_t *bhs;
|
||
|
||
/*
|
||
| check if there is outstanding work in:
|
||
| 1- the Inmediate queue
|
||
| 2- the R2T queue
|
||
| 3- the cmd queue, only if the command window allows it.
|
||
*/
|
||
which = BIT(0) | BIT(1);
|
||
if(SNA_GT(sn->cmd, sn->maxCmd) == 0)
|
||
which |= BIT(2);
|
||
|
||
if((pq = i_dqueue_snd(sp, which)) == NULL)
|
||
break;
|
||
|
||
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);
|
||
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(5, "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(pq->ccb)
|
||
i_nqueue_hld(sp, pq);
|
||
|
||
if((error = isc_sendPDU(sp, pq)) == 0)
|
||
ndone++;
|
||
else {
|
||
xdebug("error=%d ndone=%d opcode=0x%x ccb=%p itt=%x",
|
||
error, ndone, bhs->opcode, pq->ccb, ntohl(bhs->itt));
|
||
if(error == EPIPE) {
|
||
// XXX: better do some error recovery ...
|
||
break;
|
||
}
|
||
#if 0
|
||
if(pq->ccb) {
|
||
i_remove_hld(sp, pq);
|
||
pq->ccb->ccb_h.status |= CAM_UNREC_HBA_ERROR; // some better error?
|
||
XPT_DONE(pq->ccb);
|
||
}
|
||
else {
|
||
// XXX: now what?
|
||
// how do we pass back an error?
|
||
}
|
||
#endif
|
||
}
|
||
if(pq->ccb == NULL || error)
|
||
pdu_free(sp->isc, pq);
|
||
}
|
||
return ndone;
|
||
}
|
||
|
||
/*
|
||
| survives link breakdowns.
|
||
*/
|
||
static void
|
||
ism_proc(void *vp)
|
||
{
|
||
isc_session_t *sp = (isc_session_t *)vp;
|
||
int odone;
|
||
|
||
debug_called(8);
|
||
sdebug(3, "started");
|
||
|
||
sp->flags |= ISC_SM_RUNNING;
|
||
do {
|
||
if(sp->flags & ISC_SM_HOLD)
|
||
odone = 0;
|
||
else
|
||
odone = proc_out(sp);
|
||
sdebug(7, "odone=%d", odone);
|
||
if(odone == 0) {
|
||
mtx_lock(&sp->io_mtx);
|
||
#ifdef ISC_OWAITING
|
||
sp->flags |= ISC_OWAITING;
|
||
#endif
|
||
if((msleep(&sp->flags, &sp->io_mtx, PRIBIO, "isc_proc", hz*30) == EWOULDBLOCK)
|
||
&& (sp->flags & ISC_CON_RUNNING))
|
||
_nop_out(sp);
|
||
#ifdef ISC_OWAITING
|
||
sp->flags &= ~ISC_OWAITING;
|
||
#endif
|
||
mtx_unlock(&sp->io_mtx);
|
||
}
|
||
} while(sp->flags & ISC_SM_RUN);
|
||
|
||
sp->flags &= ~ISC_SM_RUNNING;
|
||
|
||
#if __FreeBSD_version >= 700000
|
||
destroy_dev(sp->dev);
|
||
#endif
|
||
|
||
sdebug(3, "terminated");
|
||
|
||
wakeup(sp);
|
||
kproc_exit(0);
|
||
}
|
||
|
||
#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, sp->dev->si_name);
|
||
|
||
sysctl_ctx_init(&sp->clist);
|
||
sp->oid = SYSCTL_ADD_NODE(&sp->clist,
|
||
SYSCTL_CHILDREN(sp->isc->oid),
|
||
OID_AUTO,
|
||
sp->dev->si_name+5, // iscsi0
|
||
CTLFLAG_RD,
|
||
0,
|
||
"initiator");
|
||
SYSCTL_ADD_PROC(&sp->clist,
|
||
SYSCTL_CHILDREN(sp->oid),
|
||
OID_AUTO,
|
||
"targetname",
|
||
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",
|
||
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",
|
||
CTLFLAG_RD,
|
||
(void *)sp, 0,
|
||
isc_dump_stats, "A", "statistics");
|
||
}
|
||
|
||
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_lost_target(sp, sp->sid);
|
||
|
||
mtx_lock(&sc->mtx);
|
||
TAILQ_REMOVE(&sc->isc_sess, sp, sp_link);
|
||
sc->nsess--;
|
||
mtx_unlock(&sc->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);
|
||
sc->sessions[sp->sid] = NULL;
|
||
|
||
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);
|
||
#if 1
|
||
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);
|
||
#else
|
||
mtx_init(&sp->rsv_mtx, "iscsi-rsv", NULL, MTX_SPIN);
|
||
mtx_init(&sp->rsp_mtx, "iscsi-rsp", NULL, MTX_SPIN);
|
||
mtx_init(&sp->snd_mtx, "iscsi-snd", NULL, MTX_SPIN);
|
||
mtx_init(&sp->hld_mtx, "iscsi-hld", NULL, MTX_SPIN);
|
||
#endif
|
||
mtx_init(&sp->io_mtx, "iscsi-io", NULL, MTX_DEF);
|
||
|
||
isc_add_sysctls(sp);
|
||
|
||
sp->flags |= ISC_SM_RUN;
|
||
|
||
return kproc_create(ism_proc, sp, &sp->stp, 0, 0, "ism_%d", sp->sid);
|
||
}
|