Greetings all, It is my great pleasure to announce that the Open-FCoE.org based TCM fabric module (tcm_fc) has been merged into lio-core-2.6.git/master. As of LIO v3.4.0-rc1, 100% of logic for v3.x TCM Persistent Reservations and ALUA is running across iSCSI, FCoE and Virtual SAS based LUNs. This would not have been possible without the tremendous contributions by Joe Eykholt with his work to tcm_fc and libfc. Thank you Joe! The initial wiki entry has been added with details and a simple howto. http://www.linux-iscsi.org/index.php/Openfcoe Alow included below is the entry including sg_inq -i, sg_persist -c and sg_rtpg output from a TCM based FCoE Target LUN. Any constructive comments or questions are welcome! --nab Contents [hide] * 1 Description * 2 Control interface * 3 Source * 4 What does a running example look like..? * 5 Open-FCoE Initiator [edit] Description The tcm_fc fabric module is based on the open-fcoe.org target code and has been modified to run using a modified upstream Linux libfc module. This includes a patch series to reenable Point to Point module for libfc (which have been merged upstream), and a set of hooks into libfc to be able to hand off incoming FLOGI requests to FC based target modules. [edit] Control interface The tcm_fc fabric module is using the configfs interface in /sys/kernel/config/target/fc. Note that there is NO strict open-fcoe userspace code requirement in order to get up and running. [edit] Source http://git.kernel.org/?p=linux/kernel/git/nab/lio-core-2.6.git;a=tree;f=drivers/target/tcm_fc;hb=HEAD [edit] What does a running example look like..? *) Configure using configfs # Create the '20:00:' prefixed FCoE Lport from network inteface eth0 mkdir -p /sys/kernel/config/target/fc/20:00:00:e0:81:c0:90:b3/tpgt_1/lun/lun_0 # Chdir and create tcm_fc_port from TCM FILEIO object cd /sys/kernel/config/target/fc/20\:00\:00\:e0\:81\:c0\:90\:b3/tpgt_1/lun/lun_0/ ln -s /sys/kernel/config/target/core/fileio_0/myfile/ tcm_fc_port # Chdir and created '20:00' prefixed Initiator WWPN from it's own network interface cd ../../ ; mkdir -p acl/20:00:00:e0:81:c0:90:b2/lun_0 ; cd acl/20\:00\:00\:e0\:81\:c0\:90\:b2/lun_0 # Create explict MappedLUN=0 for NodeACl to TPG LUN 0 ln -s /sys/kernel/config/target/fc/20\:00\:00\:e0\:81\:c0\:90\:b3/tpgt_1/lun/lun_0/ lun_0 *) Here is what a running configuration looks like from /sys/kernel/config/target/fc/ target# tree /sys/kernel/config/target/fc/ /sys/kernel/config/target/fc/ |-- 20:00:00:e0:81:c0:90:b3 | `-- tpgt_1 | |-- acl | | `-- 20:00:00:e0:81:c0:90:b2 | | |-- auth | | | |-- node_name | | | `-- port_name | | `-- lun_0 | | `-- lun_0 -> ../../../../../../../target/fc/20:00:00:e0:81:c0:90:b3/tpgt_1/lun/lun_0 | `-- lun | `-- lun_0 | |-- alua_tg_pt_gp | |-- alua_tg_pt_offline | |-- alua_tg_pt_status | |-- alua_tg_pt_write_md | `-- tcm_fc_port -> ../../../../../../target/core/fileio_0/myfile `-- version 10 directories, 7 files *) dmesg output [ 176.370130] <<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>>>>>>>>>>>>>>> [ 176.371205] Initialized struct target_fabric_configfs: ffff88003787b800 for fc [ 176.372739] <<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>>>>>>>>>>> [ 180.529964] Target_Core_ConfigFS: REGISTER -> group: ffffffffa02b9480 name: fc [ 180.531086] Target_Core_ConfigFS: REGISTER -> Located fabric: fc [ 180.531803] Target_Core_ConfigFS: REGISTER -> ffffffffa0366f70 [ 180.532506] Target_Core_ConfigFS: REGISTER -> Allocated Fabric: fc [ 180.532921] Target_Core_ConfigFS: REGISTER -> Set tf->tf_fabric for fc [ 180.532921] TARGET_CORE[fc]: Allocated Normal se_portal_group_t for endpoint: 20:00:00:e0:81:c0:90:b3, Portal Tag: 1 [ 188.053789] fileio/fc: Adding to default ALUA Target Port Group: alua/default_tg_pt_gp [ 188.054913] fc_TPG[1]_LUN[0] - Activated fc Logical Unit from CORE HBA: 1 [ 211.862437] fc_TPG[1] - Added ACL with TCQ Depth: 32 for fc Initiator Node: 20:00:00:e0:81:c0:90:b2 [ 219.960620] fc_TPG[1]_LUN[0->0] - Added RW ACL for InitiatorNode: 20:00:00:e0:81:c0:90:b2 *) Next, load the fcoe module and create an association to the matching LPORT interface configured with tcm_fc: modprobe fcoe ; echo eth0 > /sys/module/fcoe/parameters/create you should see something like the following in the target side kernel ring buffer: [ 469.432122] device eth0 entered promiscuous mode [ 469.433179] scsi0 : FCoE Driver [ 469.435336] host0: libfc: Link up on port ( 0) and the target will be configured! [edit] Open-FCoE Initiator Now we are ready to connect from an Open-FCOE Initiator. Remember that in order to run the Initiator in Point to Point mode, the necessary patches to libfc are also required. Just as on the target side, load the fcoe module and create the association to the network interface on the initiator capable of communication with the LPORT network interface configured above: modprobe fcoe ; echo eth0 > /sys/module/fcoe/parameters/create After a few seconds, the FCoE LUNs will be detected and registered with Linux/SCSI.. Here is what that output looks like on the Open-FCOE initiator side: [ 853.183484] device eth0 entered promiscuous mode [ 853.184640] scsi0 : FCoE Driver [ 853.186064] host0: libfc: Link up on port ( 0) [ 856.754764] host0: Assigned Port ID 10101 [ 856.758376] scsi 0:0:0:0: Direct-Access LIO-ORG FILEIO 3.1 PQ: 0 ANSI: 5 [ 856.818511] sd 0:0:0:0: [sda] READ CAPACITY(16) failed [ 856.819201] sd 0:0:0:0: [sda] Result: hostbyte=DID_ABORT driverbyte=DRIVER_OK [ 856.820127] sd 0:0:0:0: [sda] Sense not available. [ 856.820964] sd 0:0:0:0: [sda] 97656251 512-byte logical blocks: (50.0 GB/46.5 GiB) [ 856.822580] sd 0:0:0:0: [sda] Write Protect is off [ 856.823230] sd 0:0:0:0: [sda] Mode Sense: 2f 00 00 00 [ 856.823640] sd 0:0:0:0: [sda] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA [ 856.825018] sd 0:0:0:0: [sda] READ CAPACITY(16) failed [ 856.825688] sd 0:0:0:0: [sda] Result: hostbyte=DID_ABORT driverbyte=DRIVER_OK [ 856.826620] sd 0:0:0:0: [sda] Sense not available. [ 856.828304] sda: unknown partition table [ 856.830403] sd 0:0:0:0: [sda] READ CAPACITY(16) failed [ 856.831109] sd 0:0:0:0: [sda] Result: hostbyte=DID_ABORT driverbyte=DRIVER_OK [ 856.832039] sd 0:0:0:0: [sda] Sense not available. [ 856.833689] sd 0:0:0:0: [sda] Attached SCSI disk [ 857.186393] ------------[ cut here ]------------ [ 857.187054] WARNING: at drivers/scsi/libfc/fc_lport.c:1370 fc_lport_timeout+0x49/0x87 [libfc]() [ 857.188144] Hardware name: [ 857.191292] Modules linked in: sd_mod crc_t10dif fcoe libfcoe libfc scsi_transport_fc scsi_tgt ib_iser rdma_cm ib_cm iw_cm ib_sa ib_mad ib_core ib_addr ipv6 iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi dm_multipath dm_mod scsi_dh loop parport_pc serio_raw parport tpm_tis virtio_balloon psmouse tpm tpm_bios pcspkr i2c_piix4 i2c_core processor button evdev ext3 jbd mbcache ide_cd_mod ide_gd_mod cdrom ata_piix ata_generic libata scsi_mod piix ide_pci_generic floppy e1000e virtio_pci virtio_ring virtio 8139cp 8139too ide_core mii thermal fan thermal_sys [ 857.202922] Pid: 16, comm: events/1 Not tainted 2.6.34-rc1 #3 [ 857.203563] Call Trace: [ 857.204064] [<ffffffffa03594e1>] ? fc_lport_timeout+0x49/0x87 [libfc] [ 857.204747] [<ffffffffa03594e1>] ? fc_lport_timeout+0x49/0x87 [libfc] [ 857.205434] [<ffffffff8103892d>] ? warn_slowpath_common+0x77/0xa3 [ 857.206102] [<ffffffffa03594e1>] ? fc_lport_timeout+0x49/0x87 [libfc] [ 857.206878] [<ffffffff8104cb06>] ? worker_thread+0x181/0x20f [ 857.207557] [<ffffffffa0359498>] ? fc_lport_timeout+0x0/0x87 [libfc] [ 857.208285] [<ffffffff81050126>] ? autoremove_wake_function+0x0/0x2e [ 857.209009] [<ffffffff8104c985>] ? worker_thread+0x0/0x20f [ 857.209693] [<ffffffff8104fcf9>] ? kthread+0x79/0x81 [ 857.210424] [<ffffffff81003694>] ? kernel_thread_helper+0x4/0x10 [ 857.211141] [<ffffffff8104fc80>] ? kthread+0x0/0x81 [ 857.211791] [<ffffffff81003690>] ? kernel_thread_helper+0x0/0x10 [ 857.212497] ---[ end trace e194c9c11700625f ]--- [ 857.265004] alua: device handler registered [ 857.290275] device-mapper: multipath round-robin: version 1.0.0 loaded [ 857.291599] sd 0:0:0:0: alua: supports implicit and explicit TPGS [ 857.292794] sd 0:0:0:0: alua: port group 00 rel port 02 [ 857.293645] sd 0:0:0:0: alua: port group 00 state A supports TOUSNA [ 857.300249] sd 0:0:0:0: alua: port group 00 state A supports TOUSNA and on the Open-FCoE TCM_FC target side you will see: [ 491.470139] host0: Assigned Port ID 10102 [ 491.470789] host0: libfc: Port ( 10102) entered point-to-point mode [ 491.471679] TARGET_CORE[fc]: Registered fabric_sess_ptr: ffff88007d474340 Notice that Port ID 10101 is being used for the FCoE Initiator, and Port ID 10102 used by the FCoE Target. * ) lsscsi output lenny64guest0:~# lsscsi [0:0:0:0] disk LIO-ORG FILEIO 3.1 /dev/sda lenny64guest0:~# lsscsi --transport [0:0:0:0] disk fc:0x200000e081c090b3,0x010102 /dev/sda * ) sg_inq -i output for EVPD 0x83 Identifier lenny64guest0:~# sg_inq -i /dev/sda VPD INQUIRY: Device Identification page Designation descriptor number 1, descriptor length: 20 designator_type: NAA, code_set: Binary associated with the addressed logical unit NAA 6, IEEE Company_id: 0x1405 Vendor Specific Identifier: 0xf776de20d Vendor Specific Identifier Extension: 0xc416d4382d8b16d0 [0x6001405f776de20dc416d4382d8b16d0] Designation descriptor number 2, descriptor length: 56 designator_type: T10 vendor identification, code_set: ASCII associated with the addressed logical unit vendor id: LIO-ORG vendor specific: FILEIO:f776de20-c416-4382-8b16-0519a7dcf3ab Designation descriptor number 3, descriptor length: 8 transport: Fibre Channel (FCP-2) designator_type: Relative target port, code_set: Binary associated with the target port Relative target port: 0x2 Designation descriptor number 4, descriptor length: 8 transport: Fibre Channel (FCP-2) designator_type: Target port group, code_set: Binary associated with the target port Target port group: 0x2 Designation descriptor number 5, descriptor length: 8 designator_type: Logical unit group, code_set: Binary associated with the addressed logical unit Logical unit group: 0x0 Designation descriptor number 6, descriptor length: 40 transport: Fibre Channel (FCP-2) designator_type: SCSI name string, code_set: UTF-8 associated with the target port SCSI name string: 20:00:00:e0:81:c0:90:b3,t,0x0001 * ) sg_persist -c output of Persistent Reservations REPORT_CAPABILITIES lenny64guest0:~# sg_persist -c /dev/sda LIO-ORG FILEIO 3.1 Peripheral device type: disk Report capabilities response: Compatible Reservation Handling(CRH): 1 Specify Initiator Ports Capable(SIP_C): 1 All Target Ports Capable(ATP_C): 1 Persist Through Power Loss Capable(PTPL_C): 1 Type Mask Valid(TMV): 1 Allow Commands: 1 Persist Through Power Loss Active(PTPL_A): 0 Support indicated in Type mask: Write Exclusive, all registrants: 1 Exclusive Access, registrants only: 1 Write Exclusive, registrants only: 1 Exclusive Access: 1 Write Exclusive: 1 Exclusive Access, all registrants: 1 * ) sg_rtpg output of ALUA REPORT_TARGET_PORT_GROUPS lenny64guest0:~# sg_rtpg /dev/sda Report target port groups: target port group id : 0x0 , Pref=0 target port group asymmetric access state : 0x00 T_SUP : 1, O_SUP : 1, U_SUP : 1, S_SUP : 1, AN_SUP : 1, AO_SUP : 1 status code : 0x00 vendor unique status : 0x00 target port count : 00 target port group id : 0x1 , Pref=0 target port group asymmetric access state : 0x00 T_SUP : 1, O_SUP : 1, U_SUP : 1, S_SUP : 1, AN_SUP : 1, AO_SUP : 1 status code : 0x00 vendor unique status : 0x00 target port count : 01 Relative target port ids: 0x01 target port group id : 0x2 , Pref=0 target port group asymmetric access state : 0x00 T_SUP : 1, O_SUP : 1, U_SUP : 1, S_SUP : 1, AN_SUP : 1, AO_SUP : 1 status code : 0x00 vendor unique status : 0x00 target port count : 01 Relative target port ids: 0x02 -- 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
