Date: Wed, 20 Aug 2003 06:44:41 +0000 From: "Jingrong Xie" <xjrcool@hotmail.com> To: gibbs@scsiguy.com, nate@root.org Cc: freebsd-scsi@freebsd.org Subject: Re: Re: AIC7899's 2 SCSI channels infect with each other in target mode? Message-ID: <Law14-F70RIYkty2dzU00067629@hotmail.com>
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-------------------------------------------------
1.(to Nate) about scsi_target(user-space scsi_disk emulator):
1)applying targ-noloop.diff result:
scsi_target crashed!
2)applying targ-numctios.diff result:
not seeing any changes.
3)applying targ-jingrong1.diff result:
ONLY log something to /var/log/messages, for my convinence ^-^.
4)applying targ-jingrong2.diff result:
when NOT using it, my prog <test_write_scsi> can only write 9 times
before ERROR!
I saw 'IO 0xXXXX out of order' warning is not very friendly and do such,
it works.
-------------------------------------------------
-------------------
1) targ-noloop.diff
-------------------
Index: src/share/examples/scsi_target/scsi_target.c
===================================================================
RCS file: /home/ncvs/src/share/examples/scsi_target/scsi_target.c,v
retrieving revision 1.14
diff -u -r1.14 scsi_target.c
--- src/share/examples/scsi_target/scsi_target.c 16 Jan 2003 00:24:29
-0000 1.14
+++ src/share/examples/scsi_target/scsi_target.c 12 Apr 2003 00:28:06
-0000
@@ -642,6 +642,7 @@
/* Insert in order, sorted by offset */
if (!TAILQ_EMPTY(ioq)) {
+#ifdef notyet
TAILQ_FOREACH_REVERSE(ccb_h, ioq, io_queue,
periph_links.tqe) {
curr_descr = (struct ctio_descr *)ccb_h->targ_descr;
if (curr_descr->offset <= c_descr->offset) {
@@ -657,6 +658,7 @@
}
}
} else {
+#endif
TAILQ_INSERT_HEAD(ioq, &ctio->ccb_h, periph_links.tqe);
}
}
-------------------
2) targ-numctios.diff
-------------------
Index: src/share/examples/scsi_target/scsi_target.c
===================================================================
RCS file: /home/ncvs/src/share/examples/scsi_target/scsi_target.c,v
retrieving revision 1.14
diff -u -r1.14 scsi_target.c
--- src/share/examples/scsi_target/scsi_target.c 16 Jan 2003 00:24:29
-0000 1.14
+++ src/share/examples/scsi_target/scsi_target.c 12 Apr 2003 00:24:33
-0000
@@ -796,7 +796,7 @@
struct ctio_descr *c_descr;
struct sigevent *se;
- if (num_ctios == MAX_CTIOS)
+ if (num_ctios >= MAX_CTIOS)
return (NULL);
ctio = (struct ccb_scsiio *)malloc(sizeof(*ctio));
-------------------
3) targ-jingrong1.diff
-------------------
*** scsi_target.c.orig Wed Aug 20 13:34:40 2003
--- scsi_target.c Wed Aug 20 14:12:49 2003
***************
*** 685,691 ****
c_descr = (struct ctio_descr *)ctio->ccb_h.targ_descr;
/* If completed item is in range, call handler */
! if ( 1 || (c_descr->event == AIO_DONE && //Avoiding 'IO ...
out of order' warning.
c_descr->offset == a_descr->base_off +
a_descr->targ_ack)
|| (c_descr->event == CTIO_DONE &&
c_descr->offset == a_descr->base_off +
a_descr->init_ack)) {
--- 685,691 ----
c_descr = (struct ctio_descr *)ctio->ccb_h.targ_descr;
/* If completed item is in range, call handler */
! if ((c_descr->event == AIO_DONE &&
c_descr->offset == a_descr->base_off +
a_descr->targ_ack)
|| (c_descr->event == CTIO_DONE &&
c_descr->offset == a_descr->base_off +
a_descr->init_ack)) {
-------------------
4) targ-jingrong2.diff
-------------------
*** scsi_cmds.c.orig Tue Aug 19 19:34:52 2003
--- scsi_cmds.c Wed Aug 20 13:35:20 2003
***************
*** 602,607 ****
--- 602,615 ----
a_descr->targ_req += ctio->dxfer_len;
if (aio_write(&c_descr->aiocb) < 0)
err(1, "aio_write"); /* XXX */
+ {//Jingrong add for test.
+ #include <syslog.h>
+ #include <stdarg.h>
+ static unsigned long g_count=0;
+ g_count++;
+ if( g_count % 100 == 0)
+ syslog(LOG_ERR,"====write %ld blocks!\n",
g_count);
+ }
} else {
if (debug)
warnx("CTIO done freeing CTIO");
-------------------------------------------------
2. test_write_wscsi.c
-------------------------------------------------
#include <stdio.h>
#include <fcntl.h>
int main(int argc, char **argv)
{
int fd = 0;
FILE *fp2 = 0;
int ret = 0;
char buf[10240];
fd = open("/dev/da0", O_RDWR);
if(argc<2){
printf("usage: %s <filename>\n", argv[0]);
return 1;
}
fp2 = fopen(argv[1], "r+");
if(fp2 <=0){
perror("fopen");
exit(1);
}
memset(buf, 0, 10240);
ret = fread( buf, 10240, 1, fp2);
lseek(fd,10240, SEEK_SET);
write(fd, buf, 10240);
return 0;
}
-------------------------------------------------
3. test.sh
-------------------------------------------------
TOTALCOUNT=$1
SLEEPTIME=$2
COUNT=0
while true ; do
echo "count = $COUNT, totalcount= $TOTALCOUNT"
if [ $COUNT -gt $TOTALCOUNT ] ; then
break ;
fi
./test_write_scsi test_write_wscsi.c
sleep $SLEEPTIME
COUNT=`expr $COUNT + 1`
done
-------------------------------------------------
4. Test:
On IA, using './test.sh 1000000 0', test for 3 days and about 1Tbytes
data, no problem.
On OA, also.
but when the two do at the same time, IA or OA will crash down soon.
-------------------------------------------------
OA# dd if=/dev/zero of=testfile bs=1024 count=102400
OA# ./scsi_target -S -W 16 0:5:0 testfile
IA# camcontrol rescan 0
IA# ./test.sh 1000000 0
IA# dd if=/dev/zero of=testfile bs=1024 count=102400
IA# ./scsi_target -S -W 16 1:5:0 testfile
OA# camcontrol rescan 1
OA# ./test.sh 1000000 0
-------------------------------------------------
5. Also about Justin's advice:
-------------------------------------------------
>You shouldn't be able to do this since ahc(4) does not support
>simultaneous target/initiator mode.
It can, you just need to disable the multi-target-id feature to do
it. I should probably modify the driver so that it will allow dual
mode operation so long as only one target-id is set and it corresponds
to the initiator's id.
Q: How could I disable the multi-target-id feature? Is the following
correct?
Beforing this advice, i use 0x27 to enable 0,1,2,5 as target-id,
GENERIC_IA: options AHC_TMODE_ENABLE=0x27
GENERIC_OA: options AHC_TMODE_ENABLE=0x27
and this is the kernel output for scsi_target:
IA#
(targbh0:ahc0:0:-1:-1): Lun now enabled for target mode
(targbh1:ahc1:0:-1:-1): Lun now enabled for target mode
OA#
(targbh0:ahc0:0:-1:-1): Lun now enabled for target mode
(targbh1:ahc1:0:-1:-1): Lun now enabled for target mode
I changed to disable the multi-target-id feature:
GENERIC_IA: options AHC_TMODE_ENABLE=0x21 #only enable 0,5 as
target-id
GENERIC_OA: options AHC_TMODE_ENABLE=0x22 #only enable 1,5 as
target-id
and this is the kernel output for scsi_target:
IA#
(targbh0:ahc0:0:-1:-1): Lun now enabled for target mode
OA#
(targbh1:ahc1:0:-1:-1): Lun now enabled for target mode
I tried 'AHC_TMODE_ENABLE=0x20' to enable only 5 as target-id, but failed!
kernel says it dont support target-mode when i using scsi_target.
thanks very much!
Regards,
Jingrong
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