[SCSI] target: Add LIO target core v4.0.0-rc6
LIO target is a full featured in-kernel target framework with the
following feature set:
High-performance, non-blocking, multithreaded architecture with SIMD
support.
Advanced SCSI feature set:
* Persistent Reservations (PRs)
* Asymmetric Logical Unit Assignment (ALUA)
* Protocol and intra-nexus multiplexing, load-balancing and failover (MC/S)
* Full Error Recovery (ERL=0,1,2)
* Active/active task migration and session continuation (ERL=2)
* Thin LUN provisioning (UNMAP and WRITE_SAMExx)
Multiprotocol target plugins
Storage media independence:
* Virtualization of all storage media; transparent mapping of IO to LUNs
* No hard limits on number of LUNs per Target; maximum LUN size ~750 TB
* Backstores: SATA, SAS, SCSI, BluRay, DVD, FLASH, USB, ramdisk, etc.
Standards compliance:
* Full compliance with IETF (RFC 3720)
* Full implementation of SPC-4 PRs and ALUA
Significant code cleanups done by Christoph Hellwig.
[jejb: fix up for new block bdev exclusive interface. Minor fixes from
Randy Dunlap and Dan Carpenter.]
Signed-off-by: Nicholas A. Bellinger <nab@linux-iscsi.org>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2010-12-18 03:11:26 +08:00
|
|
|
>>>>>>>>>> The TCM v4 fabric module script generator <<<<<<<<<<
|
|
|
|
|
|
|
|
|
|
Greetings all,
|
|
|
|
|
|
|
|
|
|
This document is intended to be a mini-HOWTO for using the tcm_mod_builder.py
|
|
|
|
|
script to generate a brand new functional TCM v4 fabric .ko module of your very own,
|
|
|
|
|
that once built can be immediately be loaded to start access the new TCM/ConfigFS
|
|
|
|
|
fabric skeleton, by simply using:
|
|
|
|
|
|
|
|
|
|
modprobe $TCM_NEW_MOD
|
|
|
|
|
mkdir -p /sys/kernel/config/target/$TCM_NEW_MOD
|
|
|
|
|
|
|
|
|
|
This script will create a new drivers/target/$TCM_NEW_MOD/, and will do the following
|
|
|
|
|
|
|
|
|
|
*) Generate new API callers for drivers/target/target_core_fabric_configs.c logic
|
2015-04-14 01:51:14 +08:00
|
|
|
->make_tpg(), ->drop_tpg(), ->make_wwn(), ->drop_wwn(). These are created
|
|
|
|
|
into $TCM_NEW_MOD/$TCM_NEW_MOD_configfs.c
|
[SCSI] target: Add LIO target core v4.0.0-rc6
LIO target is a full featured in-kernel target framework with the
following feature set:
High-performance, non-blocking, multithreaded architecture with SIMD
support.
Advanced SCSI feature set:
* Persistent Reservations (PRs)
* Asymmetric Logical Unit Assignment (ALUA)
* Protocol and intra-nexus multiplexing, load-balancing and failover (MC/S)
* Full Error Recovery (ERL=0,1,2)
* Active/active task migration and session continuation (ERL=2)
* Thin LUN provisioning (UNMAP and WRITE_SAMExx)
Multiprotocol target plugins
Storage media independence:
* Virtualization of all storage media; transparent mapping of IO to LUNs
* No hard limits on number of LUNs per Target; maximum LUN size ~750 TB
* Backstores: SATA, SAS, SCSI, BluRay, DVD, FLASH, USB, ramdisk, etc.
Standards compliance:
* Full compliance with IETF (RFC 3720)
* Full implementation of SPC-4 PRs and ALUA
Significant code cleanups done by Christoph Hellwig.
[jejb: fix up for new block bdev exclusive interface. Minor fixes from
Randy Dunlap and Dan Carpenter.]
Signed-off-by: Nicholas A. Bellinger <nab@linux-iscsi.org>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2010-12-18 03:11:26 +08:00
|
|
|
*) Generate basic infrastructure for loading/unloading LKMs and TCM/ConfigFS fabric module
|
|
|
|
|
using a skeleton struct target_core_fabric_ops API template.
|
|
|
|
|
*) Based on user defined T10 Proto_Ident for the new fabric module being built,
|
|
|
|
|
the TransportID / Initiator and Target WWPN related handlers for
|
|
|
|
|
SPC-3 persistent reservation are automatically generated in $TCM_NEW_MOD/$TCM_NEW_MOD_fabric.c
|
|
|
|
|
using drivers/target/target_core_fabric_lib.c logic.
|
|
|
|
|
*) NOP API calls for all other Data I/O path and fabric dependent attribute logic
|
|
|
|
|
in $TCM_NEW_MOD/$TCM_NEW_MOD_fabric.c
|
|
|
|
|
|
|
|
|
|
tcm_mod_builder.py depends upon the mandatory '-p $PROTO_IDENT' and '-m
|
|
|
|
|
$FABRIC_MOD_name' parameters, and actually running the script looks like:
|
|
|
|
|
|
|
|
|
|
target:/mnt/sdb/lio-core-2.6.git/Documentation/target# python tcm_mod_builder.py -p iSCSI -m tcm_nab5000
|
|
|
|
|
tcm_dir: /mnt/sdb/lio-core-2.6.git/Documentation/target/../../
|
|
|
|
|
Set fabric_mod_name: tcm_nab5000
|
|
|
|
|
Set fabric_mod_dir:
|
|
|
|
|
/mnt/sdb/lio-core-2.6.git/Documentation/target/../../drivers/target/tcm_nab5000
|
|
|
|
|
Using proto_ident: iSCSI
|
|
|
|
|
Creating fabric_mod_dir:
|
|
|
|
|
/mnt/sdb/lio-core-2.6.git/Documentation/target/../../drivers/target/tcm_nab5000
|
|
|
|
|
Writing file:
|
|
|
|
|
/mnt/sdb/lio-core-2.6.git/Documentation/target/../../drivers/target/tcm_nab5000/tcm_nab5000_base.h
|
|
|
|
|
Using tcm_mod_scan_fabric_ops:
|
|
|
|
|
/mnt/sdb/lio-core-2.6.git/Documentation/target/../../include/target/target_core_fabric_ops.h
|
|
|
|
|
Writing file:
|
|
|
|
|
/mnt/sdb/lio-core-2.6.git/Documentation/target/../../drivers/target/tcm_nab5000/tcm_nab5000_fabric.c
|
|
|
|
|
Writing file:
|
|
|
|
|
/mnt/sdb/lio-core-2.6.git/Documentation/target/../../drivers/target/tcm_nab5000/tcm_nab5000_fabric.h
|
|
|
|
|
Writing file:
|
|
|
|
|
/mnt/sdb/lio-core-2.6.git/Documentation/target/../../drivers/target/tcm_nab5000/tcm_nab5000_configfs.c
|
|
|
|
|
Writing file:
|
|
|
|
|
/mnt/sdb/lio-core-2.6.git/Documentation/target/../../drivers/target/tcm_nab5000/Kbuild
|
|
|
|
|
Writing file:
|
|
|
|
|
/mnt/sdb/lio-core-2.6.git/Documentation/target/../../drivers/target/tcm_nab5000/Kconfig
|
|
|
|
|
Would you like to add tcm_nab5000to drivers/target/Kbuild..? [yes,no]: yes
|
|
|
|
|
Would you like to add tcm_nab5000to drivers/target/Kconfig..? [yes,no]: yes
|
|
|
|
|
|
|
|
|
|
At the end of tcm_mod_builder.py. the script will ask to add the following
|
|
|
|
|
line to drivers/target/Kbuild:
|
|
|
|
|
|
|
|
|
|
obj-$(CONFIG_TCM_NAB5000) += tcm_nab5000/
|
|
|
|
|
|
|
|
|
|
and the same for drivers/target/Kconfig:
|
|
|
|
|
|
|
|
|
|
source "drivers/target/tcm_nab5000/Kconfig"
|
|
|
|
|
|
|
|
|
|
*) Run 'make menuconfig' and select the new CONFIG_TCM_NAB5000 item:
|
|
|
|
|
|
|
|
|
|
<M> TCM_NAB5000 fabric module
|
|
|
|
|
|
|
|
|
|
*) Build using 'make modules', once completed you will have:
|
|
|
|
|
|
|
|
|
|
target:/mnt/sdb/lio-core-2.6.git# ls -la drivers/target/tcm_nab5000/
|
|
|
|
|
total 1348
|
|
|
|
|
drwxr-xr-x 2 root root 4096 2010-10-05 03:23 .
|
|
|
|
|
drwxr-xr-x 9 root root 4096 2010-10-05 03:22 ..
|
|
|
|
|
-rw-r--r-- 1 root root 282 2010-10-05 03:22 Kbuild
|
|
|
|
|
-rw-r--r-- 1 root root 171 2010-10-05 03:22 Kconfig
|
|
|
|
|
-rw-r--r-- 1 root root 49 2010-10-05 03:23 modules.order
|
|
|
|
|
-rw-r--r-- 1 root root 738 2010-10-05 03:22 tcm_nab5000_base.h
|
|
|
|
|
-rw-r--r-- 1 root root 9096 2010-10-05 03:22 tcm_nab5000_configfs.c
|
|
|
|
|
-rw-r--r-- 1 root root 191200 2010-10-05 03:23 tcm_nab5000_configfs.o
|
|
|
|
|
-rw-r--r-- 1 root root 40504 2010-10-05 03:23 .tcm_nab5000_configfs.o.cmd
|
|
|
|
|
-rw-r--r-- 1 root root 5414 2010-10-05 03:22 tcm_nab5000_fabric.c
|
|
|
|
|
-rw-r--r-- 1 root root 2016 2010-10-05 03:22 tcm_nab5000_fabric.h
|
|
|
|
|
-rw-r--r-- 1 root root 190932 2010-10-05 03:23 tcm_nab5000_fabric.o
|
|
|
|
|
-rw-r--r-- 1 root root 40713 2010-10-05 03:23 .tcm_nab5000_fabric.o.cmd
|
|
|
|
|
-rw-r--r-- 1 root root 401861 2010-10-05 03:23 tcm_nab5000.ko
|
|
|
|
|
-rw-r--r-- 1 root root 265 2010-10-05 03:23 .tcm_nab5000.ko.cmd
|
|
|
|
|
-rw-r--r-- 1 root root 459 2010-10-05 03:23 tcm_nab5000.mod.c
|
|
|
|
|
-rw-r--r-- 1 root root 23896 2010-10-05 03:23 tcm_nab5000.mod.o
|
|
|
|
|
-rw-r--r-- 1 root root 22655 2010-10-05 03:23 .tcm_nab5000.mod.o.cmd
|
|
|
|
|
-rw-r--r-- 1 root root 379022 2010-10-05 03:23 tcm_nab5000.o
|
|
|
|
|
-rw-r--r-- 1 root root 211 2010-10-05 03:23 .tcm_nab5000.o.cmd
|
|
|
|
|
|
|
|
|
|
*) Load the new module, create a lun_0 configfs group, and add new TCM Core
|
|
|
|
|
IBLOCK backstore symlink to port:
|
|
|
|
|
|
|
|
|
|
target:/mnt/sdb/lio-core-2.6.git# insmod drivers/target/tcm_nab5000.ko
|
|
|
|
|
target:/mnt/sdb/lio-core-2.6.git# mkdir -p /sys/kernel/config/target/nab5000/iqn.foo/tpgt_1/lun/lun_0
|
|
|
|
|
target:/mnt/sdb/lio-core-2.6.git# cd /sys/kernel/config/target/nab5000/iqn.foo/tpgt_1/lun/lun_0/
|
|
|
|
|
target:/sys/kernel/config/target/nab5000/iqn.foo/tpgt_1/lun/lun_0# ln -s /sys/kernel/config/target/core/iblock_0/lvm_test0 nab5000_port
|
|
|
|
|
|
|
|
|
|
target:/sys/kernel/config/target/nab5000/iqn.foo/tpgt_1/lun/lun_0# cd -
|
|
|
|
|
target:/mnt/sdb/lio-core-2.6.git# tree /sys/kernel/config/target/nab5000/
|
|
|
|
|
/sys/kernel/config/target/nab5000/
|
|
|
|
|
|-- discovery_auth
|
|
|
|
|
|-- iqn.foo
|
|
|
|
|
| `-- tpgt_1
|
|
|
|
|
| |-- acls
|
|
|
|
|
| |-- attrib
|
|
|
|
|
| |-- lun
|
|
|
|
|
| | `-- lun_0
|
|
|
|
|
| | |-- alua_tg_pt_gp
|
|
|
|
|
| | |-- alua_tg_pt_offline
|
|
|
|
|
| | |-- alua_tg_pt_status
|
|
|
|
|
| | |-- alua_tg_pt_write_md
|
|
|
|
|
| | `-- nab5000_port -> ../../../../../../target/core/iblock_0/lvm_test0
|
|
|
|
|
| |-- np
|
|
|
|
|
| `-- param
|
|
|
|
|
`-- version
|
|
|
|
|
|
|
|
|
|
target:/mnt/sdb/lio-core-2.6.git# lsmod
|
|
|
|
|
Module Size Used by
|
|
|
|
|
tcm_nab5000 3935 4
|
|
|
|
|
iscsi_target_mod 193211 0
|
|
|
|
|
target_core_stgt 8090 0
|
|
|
|
|
target_core_pscsi 11122 1
|
|
|
|
|
target_core_file 9172 2
|
|
|
|
|
target_core_iblock 9280 1
|
|
|
|
|
target_core_mod 228575 31
|
|
|
|
|
tcm_nab5000,iscsi_target_mod,target_core_stgt,target_core_pscsi,target_core_file,target_core_iblock
|
|
|
|
|
libfc 73681 0
|
|
|
|
|
scsi_debug 56265 0
|
|
|
|
|
scsi_tgt 8666 1 target_core_stgt
|
|
|
|
|
configfs 20644 2 target_core_mod
|
|
|
|
|
|
|
|
|
|
----------------------------------------------------------------------
|
|
|
|
|
|
|
|
|
|
Future TODO items:
|
|
|
|
|
|
|
|
|
|
*) Add more T10 proto_idents
|
|
|
|
|
*) Make tcm_mod_dump_fabric_ops() smarter and generate function pointer
|
|
|
|
|
defs directly from include/target/target_core_fabric_ops.h:struct target_core_fabric_ops
|
|
|
|
|
structure members.
|
|
|
|
|
|
|
|
|
|
October 5th, 2010
|
|
|
|
|
Nicholas A. Bellinger <nab@linux-iscsi.org>
|