illumos gate

When you create many iSCSI targets (more than 70 in my case) with itadm the iscsi linux initiator. The linux initiator gets a truncated answer from the target, leading to a denied send targets discovery.

I have also tried with the legacy opensolaris daemon (iscsitgtd), i stopped after creating 512 IQN, and everything was working perfectly fine.

For three reasons, i am quite sure it comes from the target iscsit (comstar):
- iscsiadm says : discovery session to 10.111.140.1:3260 received unexpected opcode 0x3f (0x3f is an opcode that means REJECT from target side)
- http://opensolaris.org/jive/thread.jspa?threadID=128046&tstart=0
- the PDUs are truncated after a specific size :

iscsiadm: >    TargetName=iqn.1986-03.com.sun:02:7d714a54-50df-6fe2-b175-97248e121305
iscsiadm: >    TargetAddress=10.111.140.1:3260,1
iscsiadm: >    TargetAddress=10.111.141.1:3260,1
iscsiadm: >    TargetAddress=10.254.254.86:3260,1
iscsiadm: >    TargetName=iqn.1986-03.com.sun:02:7edae6c3-e0c0-e3ea-e511-b9b4dfd10d64
iscsiadm: >    TargetAddress=10.111.140.1:3260,1
iscsiadm: >    TargetAddress=10.111.141.1:3260,1
iscsiadm: >    TargetAddress=10.254.254.86:3260,1
iscsiadm: >    TargetName=iqn

To recreate the bug :

On opensolaris server (any version including b148 with comstar running) :

for i in `seq 100`; do itadm create-target; done;

On any linux debian iscsi initiator (any available debian version of open-iscsi) :

# /usr/bin/iscsiadm  --mode discovery --type sendtargets --portal 10.111.140.1:3260
iscsiadm: discovery session to 10.111.140.1:3260 received unexpected opcode 0x3f
iscsiadm: discovery login to 10.111.140.1 rejected: initiator error (02/0b), non-retryable, giving up
iscsiadm: Could not perform SendTargets discovery.

PS: for destroying EVERY iqn from this test server here's a small hint :

for i in `itadm list-target |awk '{print($1);}' |grep iqn|xargs`;do itadm delete-target -f $i ; done