On 1/16/2014 3:43 PM, Arshad Hussain wrote:
Hi,
I want to report an error in target. I am trying to confirm SNACK-R2T
that the target properly responds to a SNACK request. Whenever I
am putting runLength>0 it is crashing the target (machine reboot).
Sequence of PDU is like below.
I->T SCSI WRITE Command for 512B // Send out write
T->I R2T // Got R2T.
I->T SNACK BegRun=0 RunLength=1 // This crashes the Target.
/*
Send out SNACK
BegRun = First PDU whose retransmission is requested. (r2tsn)
RunLength = Number of PDU whose retransmission is requested.
*/
However, if the begrun and runlength is modified to 0 (Send all) it
works.
I->T SCSI WRITE Command for 512B // Send out write
T->I R2T // Got R2T.
I->T SNACK BegRun=0 RunLength=0 // Works correctly.
My Machine Details.
[root@localhost test_suite_iscsi]# cat /sys/kernel/config/target/version
Target Engine Core ConfigFS Infrastructure v4.1.0-rc2-ml on
Linux/x86_64 on 3.10.13-101.fc18.x86_64
[root@localhost test_suite_iscsi]#
[root@localhost test_suite_iscsi]# uname -a
Linux localhost.localdomain 3.10.13-101.fc18.x86_64 #1 SMP Fri Sep 27
20:22:12 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux
[root@localhost test_suite_iscsi]#
Thanks,
Arshad
Hi,
I Regret the slow turnaround.
What I got is, if I do not convert from host to network byte order
and assign BegRun and RunLength values greater than 0. ( of course 0 is
same for both endian ) it crashes the machine.
This was of course error on my side. However should this have crashed
the target.? Shoud not this have returned an error and stopped.
Your comments please.
Thanks,
Arshad
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