[PATCH 0/3] [TCM/PR]: Intra-fabric iSCSI/SAS/FCoE Persistent Reservations support
From: Nicholas A. Bellinger
Date: Sun Mar 14 2010 - 05:18:55 EST
From: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx>
Greetings Linux/SCSI folks,
This patch series to lio-core-2.6.git/master adds support for TCM v3.x >= Persistent
Reservation SPEC_I_PT=1 TransportID processing and REGISTER_AND_MOVE logic to safely
function in intra-fabric mode across all available TCM fabric modules using a new set
of demo-mode safe configfs dependency wrappers.
This means that the exhaustive (all SPC-4 defined feature bits) Persistent Reservation
support in TCM v3.x at:
http://git.kernel.org/?p=linux/kernel/git/nab/lio-core-2.6.git;a=blob;f=drivers/target/target_core_pr.c;hb=HEAD
is now functioning not only in multi-fabric mode (processing PR ops across multiple
fabric modules), but also in intra-fabric mode (a single PR op spanning multiple fabrics)
for the SPEC_I_PT=1 TransportID processing and REGISTER_AND_MOVE op cases in both explict
ACL and demo-mode operation..
This patch has been tested using LIO-Target iSCSI Target Ports, TCM_Loop Virtual SAS
Target Ports, and tcm_fc OpenFCoE.org Target Ports from new code in lio-core-2.6.git/tcm_fc.
Below is the example usage of intra-fabric PR ops with APTPL=1 using SCSI ports from these
three independent (3) fabric modules.
Comments..?
--nab
Nicholas Bellinger (3):
[TCM/PR]: Add TPG, NodeACL and MappedLUN wrappers for
configfs_[un]depend_item()
[TCM/PR]: Convert REGISTER_AND_MOVE use new configfs dependency
wrappers
[TCM/PR]: Add support for intra-fabric SPEC_I_PT=1 TransportID
processing
drivers/target/target_core_pr.c | 360 ++++++++++++++++++++++++++++-----------
1 files changed, 260 insertions(+), 100 deletions(-)
*) Create PR registrations for iSCSI (iqn.1993-08.org.debian:01:2dadf92d0ef) and
Virtual SAS (naa.60014051e4328f54) fabric from iSCSI port using SPEC_I_PT=1 and APTPL=0
sg_persist -vvv --out --device /dev/sde --register --param-rk=0 --param-sark=0x1234ffff -T 5 -X 06,00,00,00,6E,61,61,2E,36,30,30,31,34,30,35,31,65,34,33,32,38,66,35,34,00
number of tranport-ids decoded from command line (or stdin): 1
Decode given transport-ids:
Transport Id of initiator:
SAS address: 0x6e61612e36303031
open /dev/sde with flags=0x800
inquiry cdb: 12 00 00 00 24 00
duration=0 ms
LIO-ORG IBLOCK 3.1
Peripheral device type: disk
open /dev/sde with flags=0x802
Persistent Reservation Out cmd: 5f 00 05 00 00 00 00 00 34 00
Persistent Reservation Out parameters:
00 00 00 00 00 00 00 00 00 00 00 00 00 12 34 ff ff .............4..
10 00 00 00 00 08 00 00 00 00 00 00 18 06 00 00 00 ................
20 6e 61 61 2e 36 30 30 31 34 30 35 31 65 34 33 32 naa.60014051e432
30 38 66 35 34 8f54
duration=8 ms
PR out: command (Register) successful
*) Create PR Write Exclusive Registrants Only Reservation from Virtual SAS Port (naa.60014051e4328f54)
sg_persist -vvv --out --reserve -d /dev/sdg --param-rk=0x1234ffff -T 5
open /dev/sdg with flags=0x800
inquiry cdb: 12 00 00 00 24 00
duration=0 ms
LIO-ORG IBLOCK 3.1
Peripheral device type: disk
open /dev/sdg with flags=0x802
Persistent Reservation Out cmd: 5f 01 05 00 00 00 00 00 18 00
Persistent Reservation Out parameters:
00 00 00 00 00 12 34 ff ff 00 00 00 00 00 00 00 00 .....4..........
10 00 00 00 00 00 00 00 00 ........
duration=0 ms
PR out: command (Reserve) successful
*) Call REGISTER_AND_MOVE with APTPL=1 to transfer PR reservation from Virtual SAS Port (naa.60014051e4328f54)
to a new registration on the FCoE Target port (20:00:50:41:4c:4f:3b:00)
sg_persist -vvv --out --register-move --relative-target-port 3 -Z -d /dev/sdg --param-rk=0x1234ffff --param-sark=0xabcdffff -X 00,00,00,00,00,00,00,00,32,30,3A,30,30,3A,35,30,3A,34,31,3A,34,63,3A,34,66,3A,33,62,3A,30,30,00
number of tranport-ids decoded from command line (or stdin): 1
Decode given transport-ids:
Transport Id of initiator:
FCP-2 World Wide Name:
00 32 30 3a 30 30 3a 35 30 20:00:50
Transport Id of initiator:
SAS address: 0x3a30300000000000
[Unexpected format code: 1]
open /dev/sdg with flags=0x800
inquiry cdb: 12 00 00 00 24 00
duration=0 ms
LIO-ORG IBLOCK 3.1
Peripheral device type: disk
open /dev/sdg with flags=0x802
Persistent Reservation Out cmd: 5f 07 08 00 00 00 00 00 38 00
Persistent Reservation Out parameters:
00 00 00 00 00 12 34 ff ff 00 00 00 00 ab cd ff ff .....4..........
10 00 01 00 03 00 00 00 20 00 00 00 00 00 00 00 00 ....... ........
20 32 30 3a 30 30 3a 35 30 3a 34 31 3a 34 63 3a 34 20:00:50:41:4c:4
30 66 3a 33 62 3a 30 30 00 f:3b:00.
duration=8 ms
PR out: 'register and move' command successful
*) Display PERSISTENT_RESERVE_IN READ_FULL_STATUS
sg_persist --in -s -d /dev/sdg LIO-ORG IBLOCK 3.1
Peripheral device type: disk
PR generation=0x3
Key=0x1234ffff
All target ports bit clear
Relative port address: 0x2
not reservation holder
Transport Id of initiator:
iSCSI world wide unique port id: iqn.1993-08.org.debian:01:2dadf92d0ef
Key=0x1234ffff
All target ports bit clear
Relative port address: 0x4
not reservation holder
Transport Id of initiator:
SAS address: 0x60014051e4328f54
Key=0xabcdffff
All target ports bit clear
Relative port address: 0x3
<< Reservation holder >>
scope: LU_SCOPE, type: Write Exclusive, registrants only
Transport Id of initiator:
FCP-2 World Wide Name:
00 20 00 50 41 4c 4f 3b 00 .PALO;.
*) kernel ring buffer output, note that virtual SAS ports appear as 'loopback'
SPC-3 PR SPEC_I_PT: Located loopback Node: naa.60014051e4328f54 Port RTPI: 4
SPC-3 PR [iSCSI] Service Action: REGISTER Initiator Node: iqn.1993-08.org.debian:01:2dadf92d0ef
SPC-3 PR [iSCSI] for SINGLE TCM Subsystem iblock Object Target Port(s)
SPC-3 PR [iSCSI] SA Res Key: 0x000000001234ffff PRgeneration: 0x00000000 APTPL: 0
SPC-3 PR [iSCSI] SPEC_I_PT: Successfully registered Transport ID for Node: iqn.1993-08.org.debian:01:2dadf92d0ef Mapped LUN: 0
SPC-3 PR [loopback] Service Action: REGISTER Initiator Node: naa.60014051e4328f54
SPC-3 PR [loopback] for SINGLE TCM Subsystem iblock Object Target Port(s)
SPC-3 PR [loopback] SA Res Key: 0x000000001234ffff PRgeneration: 0x00000001 APTPL: 0
SPC-3 PR [loopback] SPEC_I_PT: Successfully registered Transport ID for Node: naa.60014051e4328f54 Mapped LUN: 0
SPC-3 PR: Set APTPL Bit Deactivated for REGISTER
SPC-3 PR [loopback] Service Action: RESERVE created new reservation holder TYPE: Write Exclusive Access, Registrants Only ALL_TG_PT: 0
SPC-3 PR [loopback] RESERVE Node: naa.60014051e4328f54
SPC-3 PR [fc] Extracted initiator device identifier: 20:00:50:41:4c:4f:3b:00
SPC-3 PR [fc] Service Action: REGISTER_AND_MOVE Initiator Node: 20:00:50:41:4c:4f:3b:00
SPC-3 PR [fc] for SINGLE TCM Subsystem iblock Object Target Port(s)
SPC-3 PR [fc] SA Res Key: 0x00000000abcdffff PRgeneration: 0x00000002 APTPL: 1
SPC-3 PR [loopback] Service Action: implict RELEASE cleared reservation holder TYPE: Write Exclusive Access, Registrants Only ALL_TG_PT: 0
SPC-3 PR [loopback] RELEASE Node: naa.60014051e4328f54
SPC-3 PR [fc] Service Action: REGISTER_AND_MOVE created new reservation holder TYPE: Write Exclusive Access, Registrants Only on object RTPI: 3 PRGeneration: 0x00000002
SPC-3 PR Successfully moved reservation from loopback Fabric Node: naa.60014051e4328f54 -> fc Fabric Node: 20:00:50:41:4c:4f:3b:00
SPC-3 PR: Set APTPL Bit Activated for REGISTER_AND_MOVE
*) lsmod output
lsmod
Module Size Used by
tcm_loop 12593 5
tcm_fc 21107 6
libfc 71025 1 tcm_fc
iscsi_target_mod 201832 54
target_core_mod 233736 92 tcm_loop,tcm_fc,iscsi_target_mod
scsi_tgt 8646 1 target_core_mod
configfs 20592 5 tcm_loop,tcm_fc,iscsi_target_mod,target_core_mod
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