Dear Luigi, On Thu, 02 Oct 2014 12:47:09 +0200, Luigi Tarenga wrote : > I have a little problem with LIO iscsi target and SPC-3 persistent > reservation. > The summary of my setup is: > host: > centos 6.5 x86_64 with custom kernel 3.16.3 + scst patches > targetcli (-fb) 2.1.fb37 > this host is configured to export a lun0 to the guest via iscsi > > guest: > centos 7 x64_64 with stock kernel 3.10.0-123.6.3.el7.x86_64 > iscsi-initiator-utils-6.2.0.873-21.el7.x86_64 > sg3_utils-1.37-5.el7.x86_64 > > [snip] > > the guest virtualization is done with qemu-2.0.0+kvm, NIC is virt-io and > the guest > connect to the host via a tap device. > > The guest can connect to the iSCSI target and i see the device as /dev/sda. > I partitioned, formatted and mounted it successfully. > > My problem that every PR Out command return a sense key not ready > even if the command run successfully, see this sequence: I think I already experienced these errors. Could you check the output of `dmesg` and look for errors like: filp_open(/var/target/pr/aptpl_1a4f52f5-1036-498a-a14f-8818d28de1bb) for APTPL metadata failed SPC-3 PR REGISTER: Received res_key: 0x0000000000000000 does not match existing SA REGISTER res_key: 0x000000002e5f2049 filp_open(/var/target/pr/aptpl_1a4f52f5-1036-498a-a14f-8818d28de1bb) for APTPL metadata failed You can fix this issue by creating the /var/target/pr directory. You should also create the /var/target/alua directory whih is expected by LIO too. Best regards, > [root@centos7 ~]# ll > /dev/disk/by-path/ip-172.24.49.193\:3260-iscsi-iqn.2003-01.org.linux-iscsi.lizard.x8664\:sn.15df8aa9db1d-lun-0 > lrwxrwxrwx. 1 root root 9 Oct 2 12:29 > /dev/disk/by-path/ip-172.24.49.193:3260-iscsi-iqn.2003-01.org.linux-iscsi.lizard.x8664:sn.15df8aa9db1d-lun-0 > -> ../../sda > > [root@centos7 ~]# sg_persist -n --read-keys --device=/dev/sda > PR generation=0x0, there are NO registered reservation keys > > [root@centos7 ~]# sg_persist -n -v --out --register > --param-sark=ac1831c2 --device=/dev/sda > Persistent Reservation Out cmd: 5f 00 00 00 00 00 00 00 18 00 > persistent reserve out: Fixed format, current; Sense key: Not Ready > Additional sense: Logical unit communication failure > PR out: command failed > > [root@centos7 ~]# sg_persist -n --read-keys --device=/dev/sda > PR generation=0x1, 1 registered reservation key follows: > 0xac1831c2 > > [root@centos7 ~]# sg_persist -n -v --out --register --param-rk=ac1831c2 > --device=/dev/sda > Persistent Reservation Out cmd: 5f 00 00 00 00 00 00 00 18 00 > persistent reserve out: Fixed format, current; Sense key: Not Ready > Additional sense: Logical unit communication failure > PR out: command failed > > [root@centos7 ~]# sg_persist -n --read-keys --device=/dev/sda > PR generation=0x1, there are NO registered reservation keys > > [root@centos7 ~]# dmesg | tail > [ 170.695433] scsi 3:0:0:0: alua: port group 00 rel port 01 > [ 170.695626] scsi 3:0:0:0: alua: port group 00 state A non-preferred > supports TOlUSNA > [ 170.695629] scsi 3:0:0:0: alua: Attached > [ 170.698855] scsi 3:0:0:0: Attached scsi generic sg1 type 0 > [ 170.738866] sd 3:0:0:0: [sda] 20480 512-byte logical blocks: (10.4 > MB/10.0 MiB) > [ 170.740658] sd 3:0:0:0: [sda] Write Protect is off > [ 170.740664] sd 3:0:0:0: [sda] Mode Sense: 43 00 10 08 > [ 170.741107] sd 3:0:0:0: [sda] Write cache: enabled, read cache: > enabled, supports DPO and FUA > [ 170.745222] sda: sda1 > [ 170.747875] sd 3:0:0:0: [sda] Attached SCSI disk > > > With the same setup I tryed to switch from LIO to scst and it works as > expected, sg_persist > can register and reserve keys without getting a sense key not ready. > > My tought are about a little bug in LIO but maybe is it my fault that I > added some patches to > vanilla kernel that broke LIO? > the patches I added are: > scst_exec_req_fifo-3.16.patch > put_page_callback-3.16.patch > > as documented here: > http://scst.sourceforge.net/iscsi-scst-howto.txt > > regards > Luigi > -- > To unsubscribe from this list: send the line "unsubscribe target-devel" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- Christophe Vu-Brugier -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
