Help to make iSER working
Ben RUBSON
ben.rubson at gmail.com
Thu Aug 11 20:43:21 UTC 2016
Here are the tests with udaddy from FreeBSD, trying to connect to Linux :
# udaddy -s 192.168.2.2
libibverbs: Warning: couldn't open config directory '/etc/ibverbs/'.
libibverbs: Warning: couldn't open config directory '/etc/ibverbs/'.
udaddy: starting client
udaddy: connecting
libibverbs: Warning: couldn't open config directory '/etc/ibverbs/'.
udaddy: event: RDMA_CM_EVENT_ADDR_ERROR, error: -19
test complete
return status -19
Sounds like the issue is with FreeBSD itself.
Ben
> On 11 Aug 2016, at 18:59, Ben RUBSON <ben.rubson at gmail.com> wrote:
>
>
>> 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
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