Help to make iSER working

Thu Aug 11 16:59:41 UTC 2016

> On 11 Aug 2016, at 18:10, Max Gurtovoy <maxg at mellanox.com> wrote:
> 
> On 8/11/2016 6:33 PM, Ben RUBSON wrote:
>> Thank you very much Max for your help.
>> 
>> 
>> 
>> I managed to compile the kernel with iSER support doing the 3 modifications below.
>> 
>> I added the following to /usr/src/sys/conf/options :
>> ICL_KERNEL_PROXY opt_global.h
>> 
>> And I added "options ICL_KERNEL_PROXY" to my kernel configuration file.
>> 
>> I then faced this compilation error :
>> /usr/src/sys/modules/ctl/../../cam/ctl/ctl_frontend_iscsi.c:1358:2: error: implicit declaration of function 'icl_conn_handoff_sock'
>>    icl_conn_handoff_sock(cs->cs_conn, so);
>> /usr/src/sys/modules/ctl/../../cam/ctl/ctl_frontend_iscsi.c:1358:2: note: did you mean 'icl_soft_handoff_sock'?
>> /usr/src/sys/dev/iscsi/icl.h:158:7: note: 'icl_soft_handoff_sock' declared here
>>    int icl_soft_handoff_sock(struct icl_conn *ic, struct socket *so);
>> 
>> So I replaced icl_conn_handoff_sock by icl_soft_handoff_sock (sounds like it is the needed correction).
>> 
>> iscsictl -r now does not produce previous "invalid argument" error.
>> 
>> @trasz : perhaps these modifications should be done in FreeBSD 11 source tree ?

I'm also rebuilding world with the following to see if it can help :
# cat /etc/src.conf 
WITH_ICL_KERNEL_PROXY="YES"
WITH_OFED="YES"

>> Now I'm facing the following issue :
>> 
>> # iscsictl -A -r -t iqn.2012-06.com.test:target1 -p 192.168.2.2
>> iscsid[8743]: 192.168.2.2 (iqn.2012-06.com.test:target1): failed to connect to 192.168.2.2 using ICL kernel proxy: ISCSIDCONNECT: Input/output error
>> kernel: ERROR: iser_connect_error: conn 0xfffff8096786f000
>> iscsid[1078]: child process 8743 terminated with exit status 1
> 
> please increase the debug level in both initiator and target and sent it out.

Logs from the initiator :
iscsid[39668]: 192.168.2.2 (iqn.2012-06.com.test:target1): failed to connect to 192.168.2.2 using ICL kernel proxy: ISCSIDCONNECT: Input/output error
kernel: INFO: iser_free_ib_conn_res: freeing conn 0xfffff8048d276000 cma_id 0 qp 0
kernel: DEBUG: iser_conn_connect: before cv_wait: 0xfffff8048d276000
kernel: INFO: iser_cma_handler: event 1 status -19 conn 0xfffff8048d276000 id 0xfffff80880606800
kernel: ERROR: iser_connect_error: conn 0xfffff8048d276000
kernel: DEBUG: iser_conn_connect: after cv_wait: 0xfffff8048d276000
iscsid[1078]: child process 39668 terminated with exit status 1

Logs from the target (here I tried TGT) :
No logs, as if TGT did not receive anything.
If I try to connect without the "-r", here is what I get :
tgtd: login_start(502) Target iqn.2012-06.com.test:target1 is RDMA, but conn cid:0 from iqn.1994-09.org.freebsd:srv1 is TCP
So target is correctly iSER configured.
I tried without iSER on both sides, of course it works.

> From first look I think you need to configure the LIO target to work with demo mode.

I double-checked, LIO was in demo mode, I followed this guideline :
https://community.mellanox.com/docs/DOC-1468

One strange thing, on initiator, sounds like no packet goes through the interface when trying to connect :
# sysctl hw.mlxen1.stat.rx_packets hw.mlxen1.stat.tx_packets
hw.mlxen1.stat.rx_packets: 386
hw.mlxen1.stat.tx_packets: 409
# iscsictl -A -r -t iqn.2012-06.com.test:target1 -p 192.168.2.2
# sysctl hw.mlxen1.stat.rx_packets hw.mlxen1.stat.tx_packets
hw.mlxen1.stat.rx_packets: 386
hw.mlxen1.stat.tx_packets: 409

> Another thing you can try is the user space tgt target (compile with make ISCSI_RDMA=1) that I work with mostly.
> 
>> 
>> If I remove the "-r" option from the iscsictl command, it correctly connects to the target.
>> 
>> On target side, Lio, targetcli :
>> /> ls iscsi/
>> o- iscsi ............................................. [1 Target]
>>  o- iqn.2012-06.com.test:target1 ....................... [1 TPG]
>>    o- tpg1 ........................................... [enabled]
>>      o- acls .......................................... [0 ACLs]
>>      o- luns ........................................... [1 LUN]
>>      | o- lun0 ..................... [iblock/block1 (/dev/sdc7)]
>>      o- portals ..................................... [1 Portal]
>>        o- 192.168.2.2:3260 .................. [OK, iser enabled]
>> 
>> I wanted to make some RDMA connection tests with udaddy for example, but I did not found the FreeBSD version.
>> 
>> Any advice ?
>> 
>> Many thanks !
>> 
>> Ben
>> 
>> 
>> 
>>> On 11 Aug 2016, at 15:44, Max Gurtovoy <maxg at mellanox.com> wrote:
>>> 
>>> These are the instructions I get from iscsi maintainer that merged our code to FreeBSD-11:
>>> 1. set WITH_OFED=yes in /etc/make.conf
>>> 2. "make buildkernel buildworld installkernel installworld"
>>> 3. reboot
>>> 4. kldload iser
>>> 
>>> After that, make sure you configured all the interfaces correctly and that you have ping between the 2 servers.
>>> later you need to check basic RDMA stuff on your servers (Added Hans/Oded/Meny to help you if needed).
>>> 
>>> Only if the above are working you can proceed to check iser.
>>> 
>>> Max.
>>> 
>>> On 8/11/2016 4:22 PM, Ben RUBSON wrote:
>>>> I just tested to connect to a Linux iSER enabled target, but I still get this error message at initiator side :
>>>> iscsid[1187]: 192.168.2.2 (iqn.2012-06.com.test:target1): failed to connect to 192.168.2.2 using ICL kernel proxy: ISCSIDCONNECT: Invalid argument
>>>> 
>>>>> as if my initiator did not understand the iSER command "ISCSIDCONNECT".
>>>>> How to be sure everything is correctly compiled with ICL_KERNEL_PROXY enabled ?
>>>> 
>>>> Ben
>>>> 
>>>> 
>>>>> On 10 Aug 2016, at 22:51, Max Gurtovoy <maxg at mellanox.com> wrote:
>>>>> 
>>>>> Hi Ben,
>>>>> 
>>>>> iSER initiator is supported in FreeBSD-11 but not the iser target.
>>>>> for the target you should use Linux target such as TGT (user space),
>>>>> Lio or SCST.
>>>>> 
>>>>> thanks,
>>>>> Max.
>>>>> 
>>>>> 
>>>>> On 8/10/2016 8:13 PM, Ben RUBSON wrote:
>>>>>> Hello,
>>>>>> 
>>>>>> I have some difficulties to make iSER (FreeBSD 11 BETA3) working.
>>>>>> 
>>>>>> 
>>>>>> 
>>>>>> ### My configuration :
>>>>>> 
>>>>>> 2 servers with Mellanox ConnectX-3 NICs.
>>>>>> 
>>>>>> 
>>>>>> 
>>>>>> ### What I did :
>>>>>> 
>>>>>> I rebuilt kernel adding the following to GENERIC :
>>>>>> options OFED
>>>>>> device mlxen
>>>>>> options COMPAT_LINUXKPI
>>>>>> 
>>>>>> I built iser :
>>>>>> cd /usr/src/sys/modules/iser/ ; make ; make install ; kldload iser
>>>>>> (I saw later-on that I could have used "device iser" in kernel configuration)
>>>>>> 
>>>>>> My /etc/ctl.conf :
>>>>>> portal-group pg0 {
>>>>>> discovery-auth-group no-authentication
>>>>>> listen 192.168.2.2
>>>>>> offload iser
>>>>>> }
>>>>>> target iqn.2012-06.com.test:target1 {
>>>>>> auth-group no-authentication
>>>>>> portal-group pg0
>>>>>> alias my-iser-disk
>>>>>> lun 0 {
>>>>>>  path /dev/da8
>>>>>> }
>>>>>> }
>>>>>> 
>>>>>> 
>>>>>> 
>>>>>> ### Error :
>>>>>> 
>>>>>> As soon as I do the following :
>>>>>> iscsictl -A -r -t iqn.2012-06.com.test:target1 -p 192.168.2.2
>>>>>> I get this error :
>>>>>> iscsid[1187]: 192.168.2.2 (iqn.2012-06.com.test:target1): failed to connect to 192.168.2.2 using ICL kernel proxy: ISCSIDCONNECT: Invalid argument
>>>>>> iscsid[655]: child process 1187 terminated with exit status 1
>>>>>> 
>>>>>> "sysctl hw.mlxen1.stat.tx_packets" on initiator shows that no packet is sent at all when trying to connect.
>>>>>> 
>>>>>> Did I miss something ?
>>>>>> 
>>>>>> Many thanks !
>>>>>> 
>>>>>> Ben