freebsd-dev/sys/dev/iscsi/initiator/isc_cam.c
Scott Long 3f3137fee5 Big update to the iSCSI initiator code. Highlights include IPv6 support,
many bugs fixes, many more performance improvements.

Submitted by:	Danny Braniss

M    sbin/iscontrol/iscsi.conf.5
M    sbin/iscontrol/iscontrol.8
M    sbin/iscontrol/iscontrol.h
M    sbin/iscontrol/config.c
M    sbin/iscontrol/fsm.c
M    sbin/iscontrol/login.c
M    sbin/iscontrol/pdu.c
M    sbin/iscontrol/misc.c
M    sbin/iscontrol/auth_subr.c
M    sbin/iscontrol/iscontrol.c
M    sys/dev/iscsi/initiator/isc_cam.c
M    sys/dev/iscsi/initiator/iscsi.h
M    sys/dev/iscsi/initiator/isc_soc.c
M    sys/dev/iscsi/initiator/iscsi_subr.c
M    sys/dev/iscsi/initiator/iscsivar.h
M    sys/dev/iscsi/initiator/isc_subr.c
M    sys/dev/iscsi/initiator/iscsi.c
M    sys/dev/iscsi/initiator/isc_sm.c
2008-11-25 07:17:11 +00:00

437 lines
11 KiB
C

/*-
* Copyright (c) 2005-2008 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.
*
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "opt_iscsi_initiator.h"
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/callout.h>
#if __FreeBSD_version >= 700000
#include <sys/lock.h>
#include <sys/mutex.h>
#endif
#include <sys/conf.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/uio.h>
#include <sys/sysctl.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>
// XXX: untested/incomplete
void
ic_freeze(isc_session_t *sp)
{
debug_called(8);
#if 0
sdebug(2, "freezing path=%p", sp->cam_path == NULL? 0: sp->cam_path);
if((sp->cam_path != NULL) && !(sp->flags & ISC_FROZEN)) {
xpt_freeze_devq(sp->cam_path, 1);
}
#endif
sp->flags |= ISC_FROZEN;
}
// XXX: untested/incomplete
void
ic_release(isc_session_t *sp)
{
debug_called(8);
#if 0
sdebug(2, "release path=%p", sp->cam_path == NULL? 0: sp->cam_path);
if((sp->cam_path != NULL) && (sp->flags & ISC_FROZEN)) {
xpt_release_devq(sp->cam_path, 1, TRUE);
}
#endif
sp->flags &= ~ISC_FROZEN;
}
void
ic_lost_target(isc_session_t *sp, int target)
{
struct isc_softc *isp = sp->isc;
debug_called(8);
sdebug(2, "target=%d", target);
if(sp->cam_path != NULL) {
mtx_lock(&isp->cam_mtx);
xpt_async(AC_LOST_DEVICE, sp->cam_path, NULL);
xpt_free_path(sp->cam_path);
mtx_unlock(&isp->cam_mtx);
sp->cam_path = 0; // XXX
}
}
static void
_scan_callback(struct cam_periph *periph, union ccb *ccb)
{
isc_session_t *sp = (isc_session_t *)ccb->ccb_h.spriv_ptr0;
debug_called(8);
free(ccb, M_TEMP);
if(sp->flags & ISC_FFPWAIT) {
sp->flags &= ~ISC_FFPWAIT;
wakeup(sp);
}
}
static void
_scan_target(isc_session_t *sp, int target)
{
union ccb *ccb;
debug_called(8);
sdebug(2, "target=%d", target);
if((ccb = malloc(sizeof(union ccb), M_TEMP, M_WAITOK | M_ZERO)) == NULL) {
xdebug("scan failed (can't allocate CCB)");
return;
}
CAM_LOCK(sp->isc);
xpt_setup_ccb(&ccb->ccb_h, sp->cam_path, 5/*priority (low)*/);
ccb->ccb_h.func_code = XPT_SCAN_BUS;
ccb->ccb_h.cbfcnp = _scan_callback;
ccb->crcn.flags = CAM_FLAG_NONE;
ccb->ccb_h.spriv_ptr0 = sp;
xpt_action(ccb);
CAM_UNLOCK(sp->isc);
}
int
ic_fullfeature(struct cdev *dev)
{
struct isc_softc *isp = dev->si_drv1;
isc_session_t *sp = (isc_session_t *)dev->si_drv2;
debug_called(8);
sdebug(3, "dev=%d sc=%p", dev2unit(dev), isp);
sp->flags &= ~ISC_FFPHASE;
sp->flags |= ISC_FFPWAIT;
CAM_LOCK(isp);
if(xpt_create_path(&sp->cam_path, xpt_periph, cam_sim_path(sp->isc->cam_sim),
sp->sid, CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
xdebug("can't create cam path");
CAM_UNLOCK(isp);
return ENODEV; // XXX
}
CAM_UNLOCK(isp);
_scan_target(sp, sp->sid);
while(sp->flags & ISC_FFPWAIT)
tsleep(sp, PRIBIO, "ffp", 5*hz); // the timeout time should
// be configurable
if(sp->target_nluns > 0) {
sp->flags |= ISC_FFPHASE;
return 0;
}
return ENODEV;
}
static void
_inq(struct cam_sim *sim, union ccb *ccb, int maxluns)
{
struct ccb_pathinq *cpi = &ccb->cpi;
debug_called(4);
cpi->version_num = 1; /* XXX??? */
cpi->hba_inquiry = PI_SDTR_ABLE | PI_TAG_ABLE | PI_WIDE_32;
cpi->target_sprt = 0;
cpi->hba_misc = 0;
cpi->hba_eng_cnt = 0;
cpi->max_target = ISCSI_MAX_TARGETS - 1;
cpi->initiator_id = ISCSI_MAX_TARGETS;
cpi->max_lun = maxluns;
cpi->bus_id = cam_sim_bus(sim);
cpi->base_transfer_speed = 3300;
strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
strncpy(cpi->hba_vid, "iSCSI", HBA_IDLEN);
strncpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN);
cpi->unit_number = cam_sim_unit(sim);
cpi->ccb_h.status = CAM_REQ_CMP;
}
static __inline int
_scsi_encap(struct cam_sim *sim, union ccb *ccb)
{
int ret;
#if __FreeBSD_version < 700000
ret = scsi_encap(sim, ccb);
#else
struct isc_softc *isp = (struct isc_softc *)cam_sim_softc(sim);
mtx_unlock(&isp->cam_mtx);
ret = scsi_encap(sim, ccb);
mtx_lock(&isp->cam_mtx);
#endif
return ret;
}
static void
ic_action(struct cam_sim *sim, union ccb *ccb)
{
struct ccb_hdr *ccb_h = &ccb->ccb_h;
struct isc_softc *isp = (struct isc_softc *)cam_sim_softc(sim);
isc_session_t *sp;
debug_called(8);
if((ccb_h->target_id != CAM_TARGET_WILDCARD) && (ccb_h->target_id < MAX_SESSIONS))
sp = isp->sessions[ccb_h->target_id];
else
sp = NULL;
ccb_h->spriv_ptr0 = sp;
debug(4, "func_code=0x%x flags=0x%x status=0x%x target=%d lun=%d retry_count=%d timeout=%d",
ccb_h->func_code, ccb->ccb_h.flags, ccb->ccb_h.status,
ccb->ccb_h.target_id, ccb->ccb_h.target_lun,
ccb->ccb_h.retry_count, ccb_h->timeout);
/*
| first quick check
*/
switch(ccb_h->func_code) {
default:
// XXX: maybe check something else?
break;
case XPT_SCSI_IO:
case XPT_RESET_DEV:
case XPT_GET_TRAN_SETTINGS:
case XPT_SET_TRAN_SETTINGS:
case XPT_CALC_GEOMETRY:
if(sp == NULL) {
ccb->ccb_h.status = CAM_DEV_NOT_THERE;
#if __FreeBSD_version < 700000
XPT_DONE(isp, ccb);
#else
xpt_done(ccb);
#endif
return;
}
break;
case XPT_PATH_INQ:
case XPT_NOOP:
if(sp == NULL && ccb->ccb_h.target_id != CAM_TARGET_WILDCARD) {
ccb->ccb_h.status = CAM_DEV_NOT_THERE;
#if __FreeBSD_version < 700000
XPT_DONE(isp, ccb);
#else
xpt_done(ccb);
#endif
debug(4, "status = CAM_DEV_NOT_THERE");
return;
}
}
switch(ccb_h->func_code) {
case XPT_PATH_INQ:
_inq(sim, ccb, (sp? sp->opt.maxluns: ISCSI_MAX_LUNS) - 1);
break;
case XPT_RESET_BUS: // (can just be a stub that does nothing and completes)
{
struct ccb_pathinq *cpi = &ccb->cpi;
debug(3, "XPT_RESET_BUS");
cpi->ccb_h.status = CAM_REQ_CMP;
break;
}
case XPT_SCSI_IO:
{
struct ccb_scsiio* csio = &ccb->csio;
debug(4, "XPT_SCSI_IO cmd=0x%x", csio->cdb_io.cdb_bytes[0]);
if(sp == NULL) {
ccb_h->status = CAM_REQ_INVALID; //CAM_NO_NEXUS;
debug(4, "xpt_done.status=%d", ccb_h->status);
break;
}
if(ccb_h->target_lun == CAM_LUN_WILDCARD) {
debug(3, "target=%d: bad lun (-1)", ccb_h->target_id);
ccb_h->status = CAM_LUN_INVALID;
break;
}
if(_scsi_encap(sim, ccb) != 0)
return;
break;
}
case XPT_CALC_GEOMETRY:
{
struct ccb_calc_geometry *ccg;
ccg = &ccb->ccg;
debug(6, "XPT_CALC_GEOMETRY vsize=%jd bsize=%d", ccg->volume_size, ccg->block_size);
if(ccg->block_size == 0 ||
(ccg->volume_size < ccg->block_size)) {
// print error message ...
/* XXX: what error is appropiate? */
break;
} else
cam_calc_geometry(ccg, /*extended*/1);
break;
}
case XPT_GET_TRAN_SETTINGS:
default:
ccb_h->status = CAM_REQ_INVALID;
break;
}
#if __FreeBSD_version < 700000
XPT_DONE(isp, ccb);
#else
xpt_done(ccb);
#endif
return;
}
static void
ic_poll(struct cam_sim *sim)
{
debug_called(8);
}
int
ic_getCamVals(isc_session_t *sp, iscsi_cam_t *cp)
{
int i;
debug_called(8);
if(sp && sp->isc->cam_sim) {
cp->path_id = cam_sim_path(sp->isc->cam_sim);
cp->target_id = sp->sid;
cp->target_nluns = sp->target_nluns; // XXX: -1?
for(i = 0; i < cp->target_nluns; i++)
cp->target_lun[i] = sp->target_lun[i];
return 0;
}
return ENXIO;
}
void
ic_destroy(struct isc_softc *isp)
{
debug_called(8);
CAM_LOCK(isp); // can't harm :-)
xpt_async(AC_LOST_DEVICE, isp->cam_path, NULL);
xpt_free_path(isp->cam_path);
xpt_bus_deregister(cam_sim_path(isp->cam_sim));
cam_sim_free(isp->cam_sim, TRUE /*free_devq*/);
CAM_UNLOCK(isp);
}
int
ic_init(struct isc_softc *isp)
{
struct cam_sim *sim;
struct cam_devq *devq;
struct cam_path *path;
if((devq = cam_simq_alloc(256)) == NULL)
return ENOMEM;
#if __FreeBSD_version >= 700000
mtx_init(&isp->cam_mtx, "isc-cam", NULL, MTX_DEF);
#else
isp->cam_mtx = Giant;
#endif
sim = cam_sim_alloc(ic_action, ic_poll,
"iscsi", isp, 0/*unit*/,
#if __FreeBSD_version >= 700000
&isp->cam_mtx,
#endif
1/*max_dev_transactions*/,
100/*max_tagged_dev_transactions*/,
devq);
if(sim == NULL) {
cam_simq_free(devq);
#if __FreeBSD_version >= 700000
mtx_destroy(&isp->cam_mtx);
#endif
return ENXIO;
}
CAM_LOCK(isp);
if(xpt_bus_register(sim,
#if __FreeBSD_version >= 700000
NULL,
#endif
0/*bus_number*/) != CAM_SUCCESS)
goto bad;
if(xpt_create_path(&path, xpt_periph, cam_sim_path(sim),
CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
xpt_bus_deregister(cam_sim_path(sim));
goto bad;
}
CAM_UNLOCK(isp);
isp->cam_sim = sim;
isp->cam_path = path;
debug(2, "cam subsystem initialized"); // XXX: add dev ...
debug(4, "sim=%p path=%p", sim, path);
return 0;
bad:
cam_sim_free(sim, /*free_devq*/TRUE);
CAM_UNLOCK(isp);
#if __FreeBSD_version >= 700000
mtx_destroy(&isp->cam_mtx);
#endif
return ENXIO;
}