e5dfa058da
Stop abusing xpt_periph in random plases that really have no periph related to CCB, for example, bus scanning. NULL value is fine in such cases and it is correctly logged in debug messages as "noperiph". If at some point we need some real XPT periphs (alike to pmpX now), quite likely they will be per-bus, and not a single global instance as xpt_periph now.
385 lines
9.4 KiB
C
385 lines
9.4 KiB
C
/*-
|
|
* Copyright (c) 2005-2010 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.
|
|
*
|
|
*/
|
|
/*
|
|
| $Id: isc_cam.c 998 2009-12-20 10:32:45Z danny $
|
|
*/
|
|
#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 <sys/sx.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
|
|
_inq(struct cam_sim *sim, union ccb *ccb)
|
|
{
|
|
struct ccb_pathinq *cpi = &ccb->cpi;
|
|
isc_session_t *sp = cam_sim_softc(sim);
|
|
|
|
debug_called(8);
|
|
debug(3, "sid=%d target=%d lun=%d", sp->sid, ccb->ccb_h.target_id, ccb->ccb_h.target_lun);
|
|
|
|
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 = 0; //ISCSI_MAX_TARGETS - 1;
|
|
cpi->initiator_id = ISCSI_MAX_TARGETS;
|
|
cpi->max_lun = sp->opt.maxluns - 1;
|
|
cpi->bus_id = cam_sim_bus(sim);
|
|
cpi->base_transfer_speed = 3300; // 40000; // XXX:
|
|
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;
|
|
#if defined(KNOB_VALID_ADDRESS)
|
|
cpi->transport = XPORT_ISCSI;
|
|
cpi->transport_version = 0;
|
|
#endif
|
|
}
|
|
|
|
static __inline int
|
|
_scsi_encap(struct cam_sim *sim, union ccb *ccb)
|
|
{
|
|
int ret;
|
|
|
|
#if __FreeBSD_version < 700000
|
|
ret = scsi_encap(sim, ccb);
|
|
#else
|
|
isc_session_t *sp = cam_sim_softc(sim);
|
|
|
|
mtx_unlock(&sp->cam_mtx);
|
|
ret = scsi_encap(sim, ccb);
|
|
mtx_lock(&sp->cam_mtx);
|
|
#endif
|
|
return ret;
|
|
}
|
|
|
|
void
|
|
ic_lost_target(isc_session_t *sp, int target)
|
|
{
|
|
debug_called(8);
|
|
sdebug(2, "lost target=%d", target);
|
|
|
|
if(sp->cam_path != NULL) {
|
|
mtx_lock(&sp->cam_mtx);
|
|
xpt_async(AC_LOST_DEVICE, sp->cam_path, NULL);
|
|
xpt_free_path(sp->cam_path);
|
|
mtx_unlock(&sp->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_SCANWAIT) {
|
|
sp->flags &= ~ISC_SCANWAIT;
|
|
wakeup(sp);
|
|
}
|
|
}
|
|
|
|
static int
|
|
ic_scan(isc_session_t *sp)
|
|
{
|
|
union ccb *ccb;
|
|
|
|
debug_called(8);
|
|
sdebug(2, "scanning sid=%d", sp->sid);
|
|
|
|
if((ccb = malloc(sizeof(union ccb), M_TEMP, M_WAITOK | M_ZERO)) == NULL) {
|
|
xdebug("scan failed (can't allocate CCB)");
|
|
return ENOMEM; // XXX
|
|
}
|
|
|
|
sp->flags &= ~ISC_CAMDEVS;
|
|
sp->flags |= ISC_SCANWAIT;
|
|
|
|
CAM_LOCK(sp);
|
|
if(xpt_create_path(&sp->cam_path, NULL, cam_sim_path(sp->cam_sim),
|
|
0, CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
|
|
xdebug("can't create cam path");
|
|
CAM_UNLOCK(sp);
|
|
free(ccb, M_TEMP);
|
|
return ENODEV; // XXX
|
|
}
|
|
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);
|
|
|
|
while(sp->flags & ISC_SCANWAIT)
|
|
tsleep(sp, PRIBIO, "ffp", 5*hz); // the timeout time should
|
|
// be configurable
|
|
sdebug(2, "# of luns=%d", sp->target_nluns);
|
|
|
|
if(sp->target_nluns > 0) {
|
|
sp->flags |= ISC_CAMDEVS;
|
|
return 0;
|
|
}
|
|
|
|
return ENODEV;
|
|
}
|
|
|
|
static void
|
|
ic_action(struct cam_sim *sim, union ccb *ccb)
|
|
{
|
|
isc_session_t *sp = cam_sim_softc(sim);
|
|
struct ccb_hdr *ccb_h = &ccb->ccb_h;
|
|
|
|
debug_called(8);
|
|
|
|
ccb_h->spriv_ptr0 = sp;
|
|
sdebug(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);
|
|
if(sp == NULL) {
|
|
xdebug("sp == NULL! cannot happen");
|
|
return;
|
|
}
|
|
switch(ccb_h->func_code) {
|
|
case XPT_PATH_INQ:
|
|
_inq(sim, ccb);
|
|
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(4, "sid=%d target=%d lun=%d XPT_CALC_GEOMETRY vsize=%jd bsize=%d",
|
|
sp->sid, ccb->ccb_h.target_id, ccb->ccb_h.target_lun,
|
|
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 {
|
|
int lun, *off, boff;
|
|
|
|
lun = ccb->ccb_h.target_lun;
|
|
if(lun > ISCSI_MAX_LUNS) {
|
|
// XXX:
|
|
xdebug("lun %d > ISCSI_MAX_LUNS!\n", lun);
|
|
lun %= ISCSI_MAX_LUNS;
|
|
}
|
|
off = &sp->target_lun[lun / (sizeof(int)*8)];
|
|
boff = BIT(lun % (sizeof(int)*8));
|
|
debug(4, "sp->target_nluns=%d *off=%x boff=%x",
|
|
sp->target_nluns, *off, boff);
|
|
|
|
if((*off & boff) == 0) {
|
|
sp->target_nluns++;
|
|
*off |= boff;
|
|
}
|
|
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(sp, ccb);
|
|
#else
|
|
xpt_done(ccb);
|
|
#endif
|
|
return;
|
|
}
|
|
|
|
static void
|
|
ic_poll(struct cam_sim *sim)
|
|
{
|
|
debug_called(4);
|
|
|
|
}
|
|
|
|
int
|
|
ic_getCamVals(isc_session_t *sp, iscsi_cam_t *cp)
|
|
{
|
|
debug_called(8);
|
|
|
|
if(sp && sp->cam_sim) {
|
|
cp->path_id = cam_sim_path(sp->cam_sim);
|
|
cp->target_id = 0;
|
|
cp->target_nluns = ISCSI_MAX_LUNS; // XXX: -1?
|
|
return 0;
|
|
}
|
|
return ENXIO;
|
|
}
|
|
|
|
void
|
|
ic_destroy(isc_session_t *sp )
|
|
{
|
|
debug_called(8);
|
|
|
|
if(sp->cam_path != NULL) {
|
|
sdebug(2, "name=%s unit=%d",
|
|
cam_sim_name(sp->cam_sim), cam_sim_unit(sp->cam_sim));
|
|
CAM_LOCK(sp);
|
|
#if 0
|
|
xpt_async(AC_LOST_DEVICE, sp->cam_path, NULL);
|
|
#else
|
|
xpt_async(XPT_RESET_BUS, sp->cam_path, NULL);
|
|
#endif
|
|
xpt_free_path(sp->cam_path);
|
|
xpt_bus_deregister(cam_sim_path(sp->cam_sim));
|
|
cam_sim_free(sp->cam_sim, TRUE /*free_devq*/);
|
|
|
|
CAM_UNLOCK(sp);
|
|
sdebug(2, "done");
|
|
}
|
|
}
|
|
|
|
int
|
|
ic_init(isc_session_t *sp)
|
|
{
|
|
struct cam_sim *sim;
|
|
struct cam_devq *devq;
|
|
|
|
debug_called(8);
|
|
|
|
if((devq = cam_simq_alloc(256)) == NULL)
|
|
return ENOMEM;
|
|
|
|
#if __FreeBSD_version >= 700000
|
|
mtx_init(&sp->cam_mtx, "isc-cam", NULL, MTX_DEF);
|
|
#else
|
|
isp->cam_mtx = Giant;
|
|
#endif
|
|
sim = cam_sim_alloc(ic_action,
|
|
ic_poll,
|
|
"iscsi",
|
|
sp,
|
|
sp->sid, // unit
|
|
#if __FreeBSD_version >= 700000
|
|
&sp->cam_mtx,
|
|
#endif
|
|
1, // max_dev_transactions
|
|
0, // max_tagged_dev_transactions
|
|
devq);
|
|
if(sim == NULL) {
|
|
cam_simq_free(devq);
|
|
#if __FreeBSD_version >= 700000
|
|
mtx_destroy(&sp->cam_mtx);
|
|
#endif
|
|
return ENXIO;
|
|
}
|
|
|
|
CAM_LOCK(sp);
|
|
if(xpt_bus_register(sim,
|
|
#if __FreeBSD_version >= 700000
|
|
NULL,
|
|
#endif
|
|
0/*bus_number*/) != CAM_SUCCESS) {
|
|
|
|
cam_sim_free(sim, /*free_devq*/TRUE);
|
|
CAM_UNLOCK(sp);
|
|
#if __FreeBSD_version >= 700000
|
|
mtx_destroy(&sp->cam_mtx);
|
|
#endif
|
|
return ENXIO;
|
|
}
|
|
sp->cam_sim = sim;
|
|
CAM_UNLOCK(sp);
|
|
|
|
sdebug(1, "cam subsystem initialized");
|
|
|
|
ic_scan(sp);
|
|
|
|
return 0;
|
|
}
|