| Current Path : /usr/share/examples/scsi_target/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //usr/share/examples/scsi_target/scsi_cmds.c |
/*
* SCSI Disk Emulator
*
* Copyright (c) 2002 Nate Lawson.
* 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,
* without modification, immediately at the beginning of the file.
* 2. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* 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.
*
* $FreeBSD: release/9.1.0/share/examples/scsi_target/scsi_cmds.c 231772 2012-02-15 17:28:09Z ken $
*/
#include <stdio.h>
#include <stddef.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <err.h>
#include <aio.h>
#include <unistd.h>
#include <assert.h>
#include <sys/param.h>
#include <sys/types.h>
#include <cam/cam.h>
#include <cam/cam_ccb.h>
#include <cam/scsi/scsi_all.h>
#include <cam/scsi/scsi_targetio.h>
#include "scsi_target.h"
typedef int targ_start_func(struct ccb_accept_tio *, struct ccb_scsiio *);
typedef void targ_done_func(struct ccb_accept_tio *, struct ccb_scsiio *,
io_ops);
#ifndef REPORT_LUNS
#define REPORT_LUNS 0xa0
#endif
struct targ_cdb_handlers {
u_int8_t cmd;
targ_start_func *start;
targ_done_func *done;
#define ILLEGAL_CDB 0xFF
};
static targ_start_func tcmd_inquiry;
static targ_start_func tcmd_req_sense;
static targ_start_func tcmd_rd_cap;
#ifdef READ_16
static targ_start_func tcmd_rd_cap16;
#endif
static targ_start_func tcmd_rdwr;
static targ_start_func tcmd_rdwr_decode;
static targ_done_func tcmd_rdwr_done;
static targ_start_func tcmd_null_ok;
static targ_start_func tcmd_illegal_req;
static int start_io(struct ccb_accept_tio *atio,
struct ccb_scsiio *ctio, int dir);
static int init_inquiry(u_int16_t req_flags, u_int16_t sim_flags);
static struct initiator_state *
tcmd_get_istate(u_int init_id);
static void cdb_debug(u_int8_t *cdb, const char *msg, ...);
static struct targ_cdb_handlers cdb_handlers[] = {
{ READ_10, tcmd_rdwr, tcmd_rdwr_done },
{ WRITE_10, tcmd_rdwr, tcmd_rdwr_done },
{ READ_6, tcmd_rdwr, tcmd_rdwr_done },
{ WRITE_6, tcmd_rdwr, tcmd_rdwr_done },
{ INQUIRY, tcmd_inquiry, NULL },
{ REQUEST_SENSE, tcmd_req_sense, NULL },
{ READ_CAPACITY, tcmd_rd_cap, NULL },
{ TEST_UNIT_READY, tcmd_null_ok, NULL },
{ START_STOP_UNIT, tcmd_null_ok, NULL },
{ SYNCHRONIZE_CACHE, tcmd_null_ok, NULL },
{ MODE_SENSE_6, tcmd_illegal_req, NULL },
{ MODE_SELECT_6, tcmd_illegal_req, NULL },
{ REPORT_LUNS, tcmd_illegal_req, NULL },
#ifdef READ_16
{ READ_16, tcmd_rdwr, tcmd_rdwr_done },
{ WRITE_16, tcmd_rdwr, tcmd_rdwr_done },
{ SERVICE_ACTION_IN, tcmd_rd_cap16, NULL },
#endif
{ ILLEGAL_CDB, NULL, NULL }
};
static struct scsi_inquiry_data inq_data;
static struct initiator_state istates[MAX_INITIATORS];
extern int debug;
extern off_t volume_size;
extern u_int sector_size;
extern size_t buf_size;
cam_status
tcmd_init(u_int16_t req_inq_flags, u_int16_t sim_inq_flags)
{
struct initiator_state *istate;
int i, ret;
/* Initialize our inquiry data */
ret = init_inquiry(req_inq_flags, sim_inq_flags);
if (ret != 0)
return (ret);
/* We start out life with a UA to indicate power-on/reset. */
for (i = 0; i < MAX_INITIATORS; i++) {
istate = tcmd_get_istate(i);
bzero(istate, sizeof(*istate));
istate->pending_ua = UA_POWER_ON;
}
return (0);
}
/* Caller allocates CTIO, sets its init_id
return 0 if done, 1 if more processing needed
on 0, caller sets SEND_STATUS */
int
tcmd_handle(struct ccb_accept_tio *atio, struct ccb_scsiio *ctio, io_ops event)
{
static struct targ_cdb_handlers *last_cmd;
struct initiator_state *istate;
struct atio_descr *a_descr;
int ret;
if (debug) {
warnx("tcmd_handle atio %p ctio %p atioflags %#x", atio, ctio,
atio->ccb_h.flags);
}
ret = 0;
a_descr = (struct atio_descr *)atio->ccb_h.targ_descr;
/* Do a full lookup if one-behind cache failed */
if (last_cmd == NULL || last_cmd->cmd != a_descr->cdb[0]) {
struct targ_cdb_handlers *h;
for (h = cdb_handlers; h->cmd != ILLEGAL_CDB; h++) {
if (a_descr->cdb[0] == h->cmd)
break;
}
last_cmd = h;
}
/* call completion and exit */
if (event != ATIO_WORK) {
if (last_cmd->done != NULL)
last_cmd->done(atio, ctio, event);
else
free_ccb((union ccb *)ctio);
return (1);
}
if (last_cmd->cmd == ILLEGAL_CDB) {
if (event != ATIO_WORK) {
warnx("no done func for %#x???", a_descr->cdb[0]);
abort();
}
/* Not found, return illegal request */
warnx("cdb %#x not handled", a_descr->cdb[0]);
tcmd_illegal_req(atio, ctio);
send_ccb((union ccb *)ctio, /*priority*/1);
return (0);
}
istate = tcmd_get_istate(ctio->init_id);
if (istate == NULL) {
tcmd_illegal_req(atio, ctio);
send_ccb((union ccb *)ctio, /*priority*/1);
return (0);
}
if (istate->pending_ca == 0 && istate->pending_ua != 0 &&
a_descr->cdb[0] != INQUIRY) {
tcmd_sense(ctio->init_id, ctio, SSD_KEY_UNIT_ATTENTION,
0x29, istate->pending_ua == UA_POWER_ON ? 1 : 2);
istate->pending_ca = CA_UNIT_ATTN;
if (debug) {
cdb_debug(a_descr->cdb, "UA active for %u: ",
atio->init_id);
}
send_ccb((union ccb *)ctio, /*priority*/1);
return (0);
}
/* Store current CA and UA for later */
istate->orig_ua = istate->pending_ua;
istate->orig_ca = istate->pending_ca;
/*
* As per SAM2, any command that occurs
* after a CA is reported, clears the CA. We must
* also clear the UA condition, if any, that caused
* the CA to occur assuming the UA is not for a
* persistent condition.
*/
istate->pending_ca = CA_NONE;
if (istate->orig_ca == CA_UNIT_ATTN)
istate->pending_ua = UA_NONE;
/* If we have a valid handler, call start or completion function */
if (last_cmd->cmd != ILLEGAL_CDB) {
ret = last_cmd->start(atio, ctio);
/* XXX hack */
if (last_cmd->start != tcmd_rdwr) {
a_descr->init_req += ctio->dxfer_len;
send_ccb((union ccb *)ctio, /*priority*/1);
}
}
return (ret);
}
static struct initiator_state *
tcmd_get_istate(u_int init_id)
{
if (init_id >= MAX_INITIATORS) {
warnx("illegal init_id %d, max %d", init_id, MAX_INITIATORS - 1);
return (NULL);
} else {
return (&istates[init_id]);
}
}
void
tcmd_sense(u_int init_id, struct ccb_scsiio *ctio, u_int8_t flags,
u_int8_t asc, u_int8_t ascq)
{
struct initiator_state *istate;
struct scsi_sense_data_fixed *sense;
/* Set our initiator's istate */
istate = tcmd_get_istate(init_id);
if (istate == NULL)
return;
istate->pending_ca |= CA_CMD_SENSE; /* XXX set instead of or? */
sense = (struct scsi_sense_data_fixed *)&istate->sense_data;
bzero(sense, sizeof(*sense));
sense->error_code = SSD_CURRENT_ERROR;
sense->flags = flags;
sense->add_sense_code = asc;
sense->add_sense_code_qual = ascq;
sense->extra_len =
offsetof(struct scsi_sense_data_fixed, sense_key_spec[2]) -
offsetof(struct scsi_sense_data_fixed, extra_len);
/* Fill out the supplied CTIO */
if (ctio != NULL) {
bcopy(sense, &ctio->sense_data, sizeof(*sense));
ctio->sense_len = sizeof(*sense); /* XXX */
ctio->ccb_h.flags &= ~CAM_DIR_MASK;
ctio->ccb_h.flags |= CAM_DIR_NONE | CAM_SEND_SENSE |
CAM_SEND_STATUS;
ctio->dxfer_len = 0;
ctio->scsi_status = SCSI_STATUS_CHECK_COND;
}
}
void
tcmd_ua(u_int init_id, ua_types new_ua)
{
struct initiator_state *istate;
u_int start, end;
if (init_id == CAM_TARGET_WILDCARD) {
start = 0;
end = MAX_INITIATORS - 1;
} else {
start = end = init_id;
}
for (; start <= end; start++) {
istate = tcmd_get_istate(start);
if (istate == NULL)
break;
istate->pending_ua = new_ua;
}
}
static int
tcmd_inquiry(struct ccb_accept_tio *atio, struct ccb_scsiio *ctio)
{
struct scsi_inquiry *inq;
struct atio_descr *a_descr;
struct initiator_state *istate;
struct scsi_sense_data_fixed *sense;
a_descr = (struct atio_descr *)atio->ccb_h.targ_descr;
inq = (struct scsi_inquiry *)a_descr->cdb;
if (debug)
cdb_debug(a_descr->cdb, "INQUIRY from %u: ", atio->init_id);
/*
* Validate the command. We don't support any VPD pages, so
* complain if EVPD or CMDDT is set.
*/
istate = tcmd_get_istate(ctio->init_id);
sense = (struct scsi_sense_data_fixed *)&istate->sense_data;
if ((inq->byte2 & SI_EVPD) != 0) {
tcmd_illegal_req(atio, ctio);
sense->sense_key_spec[0] = SSD_SCS_VALID | SSD_FIELDPTR_CMD |
SSD_BITPTR_VALID | /*bit value*/1;
sense->sense_key_spec[1] = 0;
sense->sense_key_spec[2] =
offsetof(struct scsi_inquiry, byte2);
} else if (inq->page_code != 0) {
tcmd_illegal_req(atio, ctio);
sense->sense_key_spec[0] = SSD_SCS_VALID | SSD_FIELDPTR_CMD;
sense->sense_key_spec[1] = 0;
sense->sense_key_spec[2] =
offsetof(struct scsi_inquiry, page_code);
} else {
bcopy(&inq_data, ctio->data_ptr, sizeof(inq_data));
ctio->dxfer_len = inq_data.additional_length + 4;
ctio->dxfer_len = min(ctio->dxfer_len,
scsi_2btoul(inq->length));
ctio->ccb_h.flags |= CAM_DIR_IN | CAM_SEND_STATUS;
ctio->scsi_status = SCSI_STATUS_OK;
}
return (0);
}
/* Initialize the inquiry response structure with the requested flags */
static int
init_inquiry(u_int16_t req_flags, u_int16_t sim_flags)
{
struct scsi_inquiry_data *inq;
inq = &inq_data;
bzero(inq, sizeof(*inq));
inq->device = T_DIRECT | (SID_QUAL_LU_CONNECTED << 5);
#ifdef SCSI_REV_SPC
inq->version = SCSI_REV_SPC; /* was 2 */
#else
inq->version = SCSI_REV_3; /* was 2 */
#endif
/*
* XXX cpi.hba_inquiry doesn't support Addr16 so we give the
* user what they want if they ask for it.
*/
if ((req_flags & SID_Addr16) != 0) {
sim_flags |= SID_Addr16;
warnx("Not sure SIM supports Addr16 but enabling it anyway");
}
/* Advertise only what the SIM can actually support */
req_flags &= sim_flags;
scsi_ulto2b(req_flags, &inq->spc2_flags);
inq->response_format = 2; /* SCSI2 Inquiry Format */
inq->additional_length = SHORT_INQUIRY_LENGTH -
offsetof(struct scsi_inquiry_data, additional_length);
bcopy("FreeBSD ", inq->vendor, SID_VENDOR_SIZE);
bcopy("Emulated Disk ", inq->product, SID_PRODUCT_SIZE);
bcopy("0.1 ", inq->revision, SID_REVISION_SIZE);
return (0);
}
static int
tcmd_req_sense(struct ccb_accept_tio *atio, struct ccb_scsiio *ctio)
{
struct scsi_request_sense *rsense;
struct scsi_sense_data_fixed *sense;
struct initiator_state *istate;
size_t dlen;
struct atio_descr *a_descr;
a_descr = (struct atio_descr *)atio->ccb_h.targ_descr;
rsense = (struct scsi_request_sense *)a_descr->cdb;
istate = tcmd_get_istate(ctio->init_id);
sense = (struct scsi_sense_data_fixed *)&istate->sense_data;
if (debug) {
cdb_debug(a_descr->cdb, "REQ SENSE from %u: ", atio->init_id);
warnx("Sending sense: %#x %#x %#x", sense->flags,
sense->add_sense_code, sense->add_sense_code_qual);
}
if (istate->orig_ca == 0) {
tcmd_sense(ctio->init_id, NULL, SSD_KEY_NO_SENSE, 0, 0);
warnx("REQUEST SENSE from %u but no pending CA!",
ctio->init_id);
}
bcopy(sense, ctio->data_ptr, sizeof(struct scsi_sense_data));
dlen = offsetof(struct scsi_sense_data_fixed, extra_len) +
sense->extra_len + 1;
ctio->dxfer_len = min(dlen, SCSI_CDB6_LEN(rsense->length));
ctio->ccb_h.flags |= CAM_DIR_IN | CAM_SEND_STATUS;
ctio->scsi_status = SCSI_STATUS_OK;
return (0);
}
static int
tcmd_rd_cap(struct ccb_accept_tio *atio, struct ccb_scsiio *ctio)
{
struct scsi_read_capacity_data *srp;
struct atio_descr *a_descr;
uint32_t vsize;
a_descr = (struct atio_descr *)atio->ccb_h.targ_descr;
srp = (struct scsi_read_capacity_data *)ctio->data_ptr;
if (volume_size > 0xffffffff)
vsize = 0xffffffff;
else
vsize = (uint32_t)(volume_size - 1);
if (debug) {
cdb_debug(a_descr->cdb, "READ CAP from %u (%u, %u): ",
atio->init_id, vsize, sector_size);
}
bzero(srp, sizeof(*srp));
scsi_ulto4b(vsize, srp->addr);
scsi_ulto4b(sector_size, srp->length);
ctio->dxfer_len = sizeof(*srp);
ctio->ccb_h.flags |= CAM_DIR_IN | CAM_SEND_STATUS;
ctio->scsi_status = SCSI_STATUS_OK;
return (0);
}
#ifdef READ_16
static int
tcmd_rd_cap16(struct ccb_accept_tio *atio, struct ccb_scsiio *ctio)
{
struct scsi_read_capacity_16 *scsi_cmd;
struct scsi_read_capacity_data_long *srp;
struct atio_descr *a_descr;
a_descr = (struct atio_descr *)atio->ccb_h.targ_descr;
scsi_cmd = (struct scsi_read_capacity_16 *)a_descr->cdb;
srp = (struct scsi_read_capacity_data_long *)ctio->data_ptr;
if (scsi_cmd->service_action != SRC16_SERVICE_ACTION) {
tcmd_illegal_req(atio, ctio);
return (0);
}
if (debug) {
cdb_debug(a_descr->cdb, "READ CAP16 from %u (%u, %u): ",
atio->init_id, volume_size - 1, sector_size);
}
bzero(srp, sizeof(*srp));
scsi_u64to8b(volume_size - 1, srp->addr);
scsi_ulto4b(sector_size, srp->length);
ctio->dxfer_len = sizeof(*srp);
ctio->ccb_h.flags |= CAM_DIR_IN | CAM_SEND_STATUS;
ctio->scsi_status = SCSI_STATUS_OK;
return (0);
}
#endif
static int
tcmd_rdwr(struct ccb_accept_tio *atio, struct ccb_scsiio *ctio)
{
struct atio_descr *a_descr;
struct ctio_descr *c_descr;
int ret;
a_descr = (struct atio_descr *)atio->ccb_h.targ_descr;
c_descr = (struct ctio_descr *)ctio->ccb_h.targ_descr;
/* Command needs to be decoded */
if ((a_descr->flags & CAM_DIR_MASK) == CAM_DIR_BOTH) {
if (debug)
warnx("Calling rdwr_decode");
ret = tcmd_rdwr_decode(atio, ctio);
if (ret == 0) {
send_ccb((union ccb *)ctio, /*priority*/1);
return (0);
}
}
ctio->ccb_h.flags |= a_descr->flags;
/* Call appropriate work function */
if ((a_descr->flags & CAM_DIR_IN) != 0) {
ret = start_io(atio, ctio, CAM_DIR_IN);
if (debug)
warnx("Starting %p DIR_IN @" OFF_FMT ":%u",
a_descr, c_descr->offset, a_descr->targ_req);
} else {
ret = start_io(atio, ctio, CAM_DIR_OUT);
if (debug)
warnx("Starting %p DIR_OUT @" OFF_FMT ":%u",
a_descr, c_descr->offset, a_descr->init_req);
}
return (ret);
}
static int
tcmd_rdwr_decode(struct ccb_accept_tio *atio, struct ccb_scsiio *ctio)
{
uint64_t blkno;
uint32_t count;
struct atio_descr *a_descr;
u_int8_t *cdb;
a_descr = (struct atio_descr *)atio->ccb_h.targ_descr;
cdb = a_descr->cdb;
if (debug)
cdb_debug(cdb, "R/W from %u: ", atio->init_id);
switch (cdb[0]) {
case READ_6:
case WRITE_6:
{
struct scsi_rw_6 *rw_6 = (struct scsi_rw_6 *)cdb;
blkno = scsi_3btoul(rw_6->addr);
count = rw_6->length;
break;
}
case READ_10:
case WRITE_10:
{
struct scsi_rw_10 *rw_10 = (struct scsi_rw_10 *)cdb;
blkno = scsi_4btoul(rw_10->addr);
count = scsi_2btoul(rw_10->length);
break;
}
#ifdef READ_16
case READ_16:
case WRITE_16:
{
struct scsi_rw_16 *rw_16 = (struct scsi_rw_16 *)cdb;
blkno = scsi_8btou64(rw_16->addr);
count = scsi_4btoul(rw_16->length);
break;
}
#endif
default:
tcmd_illegal_req(atio, ctio);
return (0);
}
if (blkno + count > volume_size) {
warnx("Attempt to access past end of volume");
tcmd_sense(ctio->init_id, ctio,
SSD_KEY_ILLEGAL_REQUEST, 0x21, 0);
return (0);
}
/* Get an (overall) data length and set direction */
a_descr->base_off = ((off_t)blkno) * sector_size;
a_descr->total_len = count * sector_size;
if (a_descr->total_len == 0) {
if (debug)
warnx("r/w 0 blocks @ blkno " OFF_FMT, blkno);
tcmd_null_ok(atio, ctio);
return (0);
} else if (cdb[0] == WRITE_6 || cdb[0] == WRITE_10) {
a_descr->flags |= CAM_DIR_OUT;
if (debug)
warnx("write %u blocks @ blkno " OFF_FMT, count, blkno);
} else {
a_descr->flags |= CAM_DIR_IN;
if (debug)
warnx("read %u blocks @ blkno " OFF_FMT, count, blkno);
}
return (1);
}
static int
start_io(struct ccb_accept_tio *atio, struct ccb_scsiio *ctio, int dir)
{
struct atio_descr *a_descr;
struct ctio_descr *c_descr;
int ret;
/* Set up common structures */
a_descr = (struct atio_descr *)atio->ccb_h.targ_descr;
c_descr = (struct ctio_descr *)ctio->ccb_h.targ_descr;
if (dir == CAM_DIR_IN) {
c_descr->offset = a_descr->base_off + a_descr->targ_req;
ctio->dxfer_len = a_descr->total_len - a_descr->targ_req;
} else {
c_descr->offset = a_descr->base_off + a_descr->init_req;
ctio->dxfer_len = a_descr->total_len - a_descr->init_req;
}
ctio->dxfer_len = min(ctio->dxfer_len, buf_size);
assert(ctio->dxfer_len >= 0);
c_descr->aiocb.aio_offset = c_descr->offset;
c_descr->aiocb.aio_nbytes = ctio->dxfer_len;
/* If DIR_IN, start read from target, otherwise begin CTIO xfer. */
ret = 1;
if (dir == CAM_DIR_IN) {
if (notaio) {
if (debug)
warnx("read sync %lu @ block " OFF_FMT,
(unsigned long)
(ctio->dxfer_len / sector_size),
c_descr->offset / sector_size);
if (lseek(c_descr->aiocb.aio_fildes,
c_descr->aiocb.aio_offset, SEEK_SET) < 0) {
perror("lseek");
err(1, "lseek");
}
if (read(c_descr->aiocb.aio_fildes,
(void *)c_descr->aiocb.aio_buf,
ctio->dxfer_len) != ctio->dxfer_len) {
err(1, "read");
}
} else {
if (debug)
warnx("read async %lu @ block " OFF_FMT,
(unsigned long)
(ctio->dxfer_len / sector_size),
c_descr->offset / sector_size);
if (aio_read(&c_descr->aiocb) < 0) {
err(1, "aio_read"); /* XXX */
}
}
a_descr->targ_req += ctio->dxfer_len;
/* if we're done, we can mark the CCB as to send status */
if (a_descr->targ_req == a_descr->total_len) {
ctio->ccb_h.flags |= CAM_SEND_STATUS;
ctio->scsi_status = SCSI_STATUS_OK;
ret = 0;
}
if (notaio)
tcmd_rdwr_done(atio, ctio, AIO_DONE);
} else {
if (a_descr->targ_ack == a_descr->total_len)
tcmd_null_ok(atio, ctio);
a_descr->init_req += ctio->dxfer_len;
if (a_descr->init_req == a_descr->total_len &&
ctio->dxfer_len > 0) {
/*
* If data phase done, remove atio from workq.
* The completion handler will call work_atio to
* send the final status.
*/
ret = 0;
}
send_ccb((union ccb *)ctio, /*priority*/1);
}
return (ret);
}
static void
tcmd_rdwr_done(struct ccb_accept_tio *atio, struct ccb_scsiio *ctio,
io_ops event)
{
struct atio_descr *a_descr;
struct ctio_descr *c_descr;
a_descr = (struct atio_descr *)atio->ccb_h.targ_descr;
c_descr = (struct ctio_descr *)ctio->ccb_h.targ_descr;
switch (event) {
case AIO_DONE:
if (!notaio && aio_return(&c_descr->aiocb) < 0) {
warn("aio_return error");
/* XXX */
tcmd_sense(ctio->init_id, ctio,
SSD_KEY_MEDIUM_ERROR, 0, 0);
send_ccb((union ccb *)ctio, /*priority*/1);
break;
}
a_descr->targ_ack += ctio->dxfer_len;
if ((a_descr->flags & CAM_DIR_IN) != 0) {
if (debug) {
if (notaio)
warnx("sending CTIO for AIO read");
else
warnx("sending CTIO for sync read");
}
a_descr->init_req += ctio->dxfer_len;
send_ccb((union ccb *)ctio, /*priority*/1);
} else {
/* Use work function to send final status */
if (a_descr->init_req == a_descr->total_len)
work_atio(atio);
if (debug)
warnx("AIO done freeing CTIO");
free_ccb((union ccb *)ctio);
}
break;
case CTIO_DONE:
switch (ctio->ccb_h.status & CAM_STATUS_MASK) {
case CAM_REQ_CMP:
break;
case CAM_REQUEUE_REQ:
warnx("requeueing request");
if ((a_descr->flags & CAM_DIR_MASK) == CAM_DIR_OUT) {
if (aio_write(&c_descr->aiocb) < 0) {
err(1, "aio_write"); /* XXX */
}
} else {
if (aio_read(&c_descr->aiocb) < 0) {
err(1, "aio_read"); /* XXX */
}
}
return;
default:
errx(1, "CTIO failed, status %#x", ctio->ccb_h.status);
}
a_descr->init_ack += ctio->dxfer_len;
if ((a_descr->flags & CAM_DIR_MASK) == CAM_DIR_OUT &&
ctio->dxfer_len > 0) {
a_descr->targ_req += ctio->dxfer_len;
if (notaio) {
if (debug)
warnx("write sync %lu @ block "
OFF_FMT, (unsigned long)
(ctio->dxfer_len / sector_size),
c_descr->offset / sector_size);
if (lseek(c_descr->aiocb.aio_fildes,
c_descr->aiocb.aio_offset, SEEK_SET) < 0) {
perror("lseek");
err(1, "lseek");
}
if (write(c_descr->aiocb.aio_fildes,
(void *) c_descr->aiocb.aio_buf,
ctio->dxfer_len) != ctio->dxfer_len) {
err(1, "write");
}
tcmd_rdwr_done(atio, ctio, AIO_DONE);
} else {
if (debug)
warnx("write async %lu @ block "
OFF_FMT, (unsigned long)
(ctio->dxfer_len / sector_size),
c_descr->offset / sector_size);
if (aio_write(&c_descr->aiocb) < 0) {
err(1, "aio_write"); /* XXX */
}
}
} else {
if (debug)
warnx("CTIO done freeing CTIO");
free_ccb((union ccb *)ctio);
}
break;
default:
warnx("Unknown completion code %d", event);
abort();
/* NOTREACHED */
}
}
/* Simple ok message used by TUR, SYNC_CACHE, etc. */
static int
tcmd_null_ok(struct ccb_accept_tio *atio, struct ccb_scsiio *ctio)
{
if (debug) {
struct atio_descr *a_descr;
a_descr = (struct atio_descr *)atio->ccb_h.targ_descr;
cdb_debug(a_descr->cdb, "Sending null ok to %u : ", atio->init_id);
}
ctio->dxfer_len = 0;
ctio->ccb_h.flags &= ~CAM_DIR_MASK;
ctio->ccb_h.flags |= CAM_DIR_NONE | CAM_SEND_STATUS;
ctio->scsi_status = SCSI_STATUS_OK;
return (0);
}
/* Simple illegal request message used by MODE SENSE, etc. */
static int
tcmd_illegal_req(struct ccb_accept_tio *atio, struct ccb_scsiio *ctio)
{
if (debug) {
struct atio_descr *a_descr;
a_descr = (struct atio_descr *)atio->ccb_h.targ_descr;
cdb_debug(a_descr->cdb, "Sending ill req to %u: ", atio->init_id);
}
tcmd_sense(atio->init_id, ctio, SSD_KEY_ILLEGAL_REQUEST,
/*asc*/0x24, /*ascq*/0);
return (0);
}
static void
cdb_debug(u_int8_t *cdb, const char *msg, ...)
{
char msg_buf[512];
int len;
va_list ap;
va_start(ap, msg);
vsnprintf(msg_buf, sizeof(msg_buf), msg, ap);
va_end(ap);
len = strlen(msg_buf);
scsi_cdb_string(cdb, msg_buf + len, sizeof(msg_buf) - len);
warnx("%s", msg_buf);
}