mirror of
https://github.com/SCST-project/scst.git
synced 2026-08-19 21:56:31 +00:00
Yan Burman
0d0d959485
svn+ssh://yanb123@svn.code.sf.net/p/scst/svn/trunk
........
r5246 | vlnb | 2014-01-29 05:30:24 +0200 (Wed, 29 Jan 2014) | 3 lines
Put CDB control byte parsing in one place
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r5247 | vlnb | 2014-01-29 06:16:58 +0200 (Wed, 29 Jan 2014) | 3 lines
Better version of the previous patch
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r5248 | vlnb | 2014-01-30 03:40:48 +0200 (Thu, 30 Jan 2014) | 7 lines
[PATCH 1/2] scst_sysfs: Make it easier to add new target sysfs attributes
This patch does not change any functionality.
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
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r5249 | vlnb | 2014-01-30 03:41:54 +0200 (Thu, 30 Jan 2014) | 10 lines
[PATCH 2/2] scst_sysfs: Add I/O statistics per target
Although it is possible to obtain these statistics by iterating over
all sessions and by computing the sum of the per-target statistics,
make per-target statistics directly available such that these can be
retrieved easily.
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
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r5250 | vlnb | 2014-01-30 04:32:44 +0200 (Thu, 30 Jan 2014) | 3 lines
Update for 3.13 kernels
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r5251 | bvassche | 2014-01-30 11:16:27 +0200 (Thu, 30 Jan 2014) | 1 line
nightly build: Add kernel 3.13 build infrastructure
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r5252 | bvassche | 2014-01-30 11:30:18 +0200 (Thu, 30 Jan 2014) | 1 line
scripts/kernel-functions: Add a bug fix for the kernel 3.13 series that is not yet present in the kernel 3.13 stable series
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r5253 | bvassche | 2014-01-30 11:31:32 +0200 (Thu, 30 Jan 2014) | 1 line
nightly build: Add kernel version 3.13.1
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r5254 | vlnb | 2014-01-31 04:32:02 +0200 (Fri, 31 Jan 2014) | 10 lines
scst_pres: Simplify PR locking
Since the time during which a PR read or write lock is held is short,
use a mutex to implement PR read and write locking. So although this
patch excludes multiple simultaneous readers that shouldn't affect the
time needed to process a PR operation measurably.
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
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r5255 | vlnb | 2014-01-31 04:33:11 +0200 (Fri, 31 Jan 2014) | 5 lines
scst_vdisk: Check that "filename" is specified at most once
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
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r5256 | vlnb | 2014-01-31 04:35:20 +0200 (Fri, 31 Jan 2014) | 5 lines
scst_vdisk: Sort "add_device_parameters" alphabetically
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
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r5260 | bvassche | 2014-02-03 11:03:03 +0200 (Mon, 03 Feb 2014) | 1 line
scripts/list-source-files: Handle Mercurial subdirectories properly
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r5264 | bvassche | 2014-02-06 14:46:51 +0200 (Thu, 06 Feb 2014) | 9 lines
scst_local: Fix a kernel oops for kernel versions < 2.6.37
Avoid that scst_local triggers "BUG: unable to handle kernel NULL
pointer dereference" on kernel versions before 2.6.37. This patch
fixes a regression introduced via patch "scst_local: Avoid
deadlock during module removal with kernel 3.6" (trunk r4566).
Reported-by: Sebastian Herbszt <herbszt@gmx.de>
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r5266 | bvassche | 2014-02-06 15:30:06 +0200 (Thu, 06 Feb 2014) | 14 lines
Hush Coverity warning of scst_ws_push_single_write() uninitialized pointer
Coverity warns that sgv may be used uninitialized. The warning
applies to WRITE SAME commands with LBDATA == PBDATA == 0 (replicate
a single block of user data into the specified LBA range).
The warning appears to be spurious - when LBDATA == PBDATA == 0,
scst_ws_write_cmd_finished() will not use the uninitialized value
saved by scst_ws_push_single_write().
Move initialization of sgv earlier in the function to quiesce the warning.
Signed-off-by: Steven J. Magnani <steve@digidescorp.com>
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r5267 | bvassche | 2014-02-06 15:38:28 +0200 (Thu, 06 Feb 2014) | 7 lines
qla2x00t: Re-sync help text with the code
The ql2xfdmienable module parameter defaults to 1, but the help text
claims it defaults to zero.
Signed-off-by: Steven J. Magnani <steve@digidescorp.com>
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r5268 | bvassche | 2014-02-06 16:17:49 +0200 (Thu, 06 Feb 2014) | 6 lines
ib_srpt: Avoid that disabling a target triggers a race condition
Avoid that disabling a target triggers a race condition with
SRP relogin. At least in theory this race condition could result
in a kernel crash.
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r5269 | bvassche | 2014-02-07 09:31:38 +0200 (Fri, 07 Feb 2014) | 9 lines
scst_sysfs: Fix a build failure on kernels 2.6.2[678]
The sysfs API is supported from kernel 2.6.26 on and uses the swap()
macro while the swap() macro was introduced in kernel 2.6.29. Hence
provide a definition of the swap() macro for kernels before 2.6.29.
Signed-off-by: Sebastian Herbszt <herbszt@gmx.de>
[bvanassche: Moved swap() definition a few lines down and added #ifndef/#endif]
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r5270 | bvassche | 2014-02-07 09:45:15 +0200 (Fri, 07 Feb 2014) | 2 lines
regression tests: Run the 2.6.26..2.6.32 tests on the sysfs code instead of procfs
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r5271 | bvassche | 2014-02-07 10:11:28 +0200 (Fri, 07 Feb 2014) | 1 line
nightly build: Update kernel versions
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r5272 | bvassche | 2014-02-07 14:43:25 +0200 (Fri, 07 Feb 2014) | 16 lines
scst_user, rt: Wake command processing thread when needed
In a fully-preemptible realtime kernel (CONFIG_PREEMPT_RT_FULL=y),
SCSI commands from an initiator time out because the userland target
application is never woken to process them.
This is because in a fully-preemptible realtime kernel, soft-IRQ
(tasklet) execution always occurs in a ksoftirqd thread and
preempt_count is not manipulated on soft-IRQ processing entry/exit.
This makes in_interrupt() useless for determining whether soft-IRQ
processing is occurring; instead, in_serving_softirq() should be
used for that purpose.
Signed-off-by: Steven J. Magnani <steve@digidescorp.com>
[bvanassche: Elaborated source code comment]
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r5273 | bvassche | 2014-02-07 14:46:39 +0200 (Fri, 07 Feb 2014) | 9 lines
scst_vdisk: Build fix for kernels 2.6.27..2.6.30
add_to_page_cache_lru and __lock_page_killable are exported since
kernel version 2.6.30. See also patch "Staging: pohmelfs: kconfig/makefile
and vfs changes" (commit 18bc0bbd162e3eb3e7ea2953c315ad4113a57164;
included in kernel v2.6.30).
Signed-off-by: Sebastian Herbszt <herbszt@gmx.de>
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r5274 | vlnb | 2014-02-08 03:04:27 +0200 (Sat, 08 Feb 2014) | 9 lines
scst_user: Convert sgv_purge_interval to jiffies before use
The sgv_purge_interval from userland is passed down without conversion to
jiffies. Yet, if it is zero, the default value is (60 * HZ).
Convert to jiffies before passing down.
Signed-off-by: Steven J. Magnani <steve@digidescorp.com>
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r5275 | vlnb | 2014-02-08 03:52:03 +0200 (Sat, 08 Feb 2014) | 19 lines
Fix spurious BUG when parse_type != SCST_USER_PARSE_STANDARD
Changeset 4224 introduced EXTRACHECKS for valid lba/data_len and state
at the end of the parsing phase of command processing.
However, the checks do not account for deferral of parsing to userland,
as occurs when SCST_USER_PARSE_CALL or SCST_USER_PARSE_EXCEPTION are specified.
In such cases the checks report errors on commands that userland has not yet
had an opportunity to parse.
NOTE: this includes a refactoring of the EXTRACHECKS to improve clarity.
The rework is not exactly equivalent to the original code, but does
conform to the comments describing the original code.
Specifically, the original code would not trap an illegal command state
unless there was also an illegal lba or data_len.
Signed-off-by: Steven J. Magnani <steve@digidescorp.com>
with some improvements
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r5276 | bvassche | 2014-02-08 10:24:28 +0200 (Sat, 08 Feb 2014) | 1 line
scst: Build fix for kernel versions before 2.6.37
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r5277 | bvassche | 2014-02-09 18:50:10 +0200 (Sun, 09 Feb 2014) | 1 line
scst_debug.h: Avoid that the sBUG() and sBUG_ON() definitions confuse the smatch static code checker
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r5281 | vlnb | 2014-02-13 06:02:56 +0200 (Thu, 13 Feb 2014) | 8 lines
iscsi-scst: fix offset calculation
Fixed a subtle bug in iSCSI-SCST with incorrectly calculated offsets
for non-page aligned transfers. Originally discovered, investigated and
fix suggested by Кирилл Тюшев, then Shahar Salzman tested and proved it.
See http://sourceforge.net/mailarchive/message.php?msg_id=31924078
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r5282 | vlnb | 2014-02-13 06:15:31 +0200 (Thu, 13 Feb 2014) | 3 lines
Web update
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r5283 | bvassche | 2014-02-14 15:05:55 +0200 (Fri, 14 Feb 2014) | 7 lines
Makefiles: remove redundant 'depmod' invocations
Running 'make modules_install' already triggers invocation of depmod,
hence leave it out from those Makefiles that use 'make modules_install'.
Signed-off-by: Steven J. Magnani <steve@digidescorp.com>
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r5284 | bvassche | 2014-02-14 15:48:54 +0200 (Fri, 14 Feb 2014) | 2 lines
Makefiles: Convert from "install" to "make modules_install"
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r5285 | bvassche | 2014-02-14 16:46:11 +0200 (Fri, 14 Feb 2014) | 1 line
mvsas_tgt/Makefile: Remove trailing whitespace
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r5286 | bvassche | 2014-02-14 17:52:10 +0200 (Fri, 14 Feb 2014) | 18 lines
Makefiles: calculate KVER properly
When deriving the kernel version (KVER) from KDIR, the file
$(KDIR)/include/config/kernel.release should be preferred over
'make kernelversion'.
For example, the Ubuntu 3.2.0-23-generic kernel has a kernel.release
file containing '3.2.0-23-generic', but 'make kernelversion' returns
3.2.14. Since the modules are stored under /lib/modules/3.2.0-23-generic,
the value in kernel.release is the correct one to use.
Also:
- Evaluate KVER only once
- All depmod commands must include KVER
Signed-off-by: Steven J. Magnani <steve@digidescorp.com>
[bvanassche: Split long lines / removed trailing whitespace]
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r5287 | bvassche | 2014-02-14 21:27:09 +0200 (Fri, 14 Feb 2014) | 1 line
nightly build: Update kernel versions
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r5288 | bvassche | 2014-02-18 10:31:44 +0200 (Tue, 18 Feb 2014) | 22 lines
scst, qla2x00t: Prevent inappropriate sleeping with a real-time kernel
With a realtime kernel with full preemption (CONFIG_PREEMPT_RT_FULL),
spinlocks can sleep, interrupt handlers run in thread context, and
the standard local_irq functions manipulate preemptibility, not HW
interruptibility. Under these conditions, most calls to local_irq
functions should be replaced by no-ops. The CONFIG_PREEMPT_RT patch
defines _nort versions of local_irq functions that compile away
under CONFIG_PREEMPT_RT_FULL and compile to their "normal"
equivalents otherwise.
Define _nort equivalents to support compilation against both
"normal" and RT-patched kernels, and use the _nort local_irq
functons in cases where spinlocks are taken within a
local_irq_save() or local_irq_disable() block. Without these
changes, runtime warnings about "sleeping function called from
invalid context" occur.
Signed-off-by: Steven J. Magnani <steve@digidescorp.com>
[bvanassche: Edited patch description and comment in scst_priv.h]
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r5289 | bvassche | 2014-02-18 10:40:36 +0200 (Tue, 18 Feb 2014) | 13 lines
Makefiles: respect DESTDIR when specified
Not all SCST components handle DESTDIR properly, or at all.
In particular:
* INSTALL_MOD_PATH should account for DESTDIR when 'make modules_install'
is invoked, so the kernel make infrastructure deploys the modules
and runs depmod against the proper directory tree.
* depmods must include a '-b' option to reference the proper directory tree.
* Drop special ISCSI_DESTDIR.
Signed-off-by: Steven J. Magnani <steve@digidescorp.com>
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r5290 | bvassche | 2014-02-18 10:41:30 +0200 (Tue, 18 Feb 2014) | 7 lines
Makefiles: 'uninstall' target fixes
Some components don't have 'uninstall' targets although the top-level
Makefile references them. Some others don't remove the proper file.
Signed-off-by: Steven J. Magnani <steve@digidescorp.com>
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r5291 | vlnb | 2014-02-19 05:45:48 +0200 (Wed, 19 Feb 2014) | 8 lines
Fix incorrect start and length calculation for issuing block discard requests
Block layer always expects start and length in 512 byte blocks, so they
should be corrected for non-512b SCST devices.
Original patch from Ken Raeburn <raeburn@permabit.com>
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r5292 | vlnb | 2014-02-19 06:06:10 +0200 (Wed, 19 Feb 2014) | 3 lines
Cleanups
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r5293 | vlnb | 2014-02-19 06:21:00 +0200 (Wed, 19 Feb 2014) | 12 lines
scst_user: Complete "Preparing" / "finished" symmetry
Add some TRACE statements so events sent to userland are bracketed by
"Preparing" and "finished". This makes it a little easier to find the
boundaries between the various stages of command processing in trace output.
Note, this patch does not implement a 'finished' message for TM events;
there is already a "TM reply" message that can serve that purpose.
Signed-off-by: Steven J. Magnani <steve@digidescorp.com>
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r5294 | bvassche | 2014-02-19 09:38:57 +0200 (Wed, 19 Feb 2014) | 1 line
nightly build: Update kernel versions
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r5295 | bvassche | 2014-02-19 10:51:35 +0200 (Wed, 19 Feb 2014) | 1 line
scripts/blockdev-perftest: Fix bashisms
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r5296 | vlnb | 2014-02-20 07:54:49 +0200 (Thu, 20 Feb 2014) | 3 lines
put_page_callback patch for 3.13.3+ kernels
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r5300 | vlnb | 2014-02-21 04:08:05 +0200 (Fri, 21 Feb 2014) | 3 lines
Docs update
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r5301 | bvassche | 2014-02-21 09:44:55 +0200 (Fri, 21 Feb 2014) | 1 line
nightly build: Add support for the put_page_callback-3.13.3 patch
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r5302 | bvassche | 2014-02-21 09:48:21 +0200 (Fri, 21 Feb 2014) | 1 line
nightly build: Update kernel versions
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r5303 | bvassche | 2014-02-21 12:02:11 +0200 (Fri, 21 Feb 2014) | 1 line
nightly build: Update kernel versions
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r5304 | bvassche | 2014-02-21 12:09:45 +0200 (Fri, 21 Feb 2014) | 1 line
nightly build: Update kernel versions
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r5305 | bvassche | 2014-02-24 08:56:05 +0200 (Mon, 24 Feb 2014) | 1 line
nightly build: Update kernel versions
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r5306 | bvassche | 2014-02-24 08:56:44 +0200 (Mon, 24 Feb 2014) | 1 line
Spelling fix: initator -> initiator
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r5307 | bvassche | 2014-02-24 09:30:50 +0200 (Mon, 24 Feb 2014) | 1 line
make rpm: Do not remove rpmbuilddir
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r5308 | bvassche | 2014-02-24 09:39:45 +0200 (Mon, 24 Feb 2014) | 5 lines
scst_local: Add newline to sysfs output
Signed-off-by: Sebastian Herbszt <herbszt@gmx.de>
[bvanassche: Reduced source code line length to 80 columns]
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r5309 | bvassche | 2014-02-25 12:55:36 +0200 (Tue, 25 Feb 2014) | 1 line
put_page_callback-3.12.11.patch: Add
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r5310 | bvassche | 2014-02-25 12:57:27 +0200 (Tue, 25 Feb 2014) | 1 line
put_page_callback-3.10.30.patch: Add
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r5311 | bvassche | 2014-02-25 12:58:08 +0200 (Tue, 25 Feb 2014) | 1 line
nightly build: Add support for kernels >= 3.10.30 and >= 3.12.11
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r5312 | bvassche | 2014-02-25 12:59:54 +0200 (Tue, 25 Feb 2014) | 1 line
nightly build: Update kernel versions
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r5315 | vlnb | 2014-02-26 04:32:39 +0200 (Wed, 26 Feb 2014) | 3 lines
Make internal memory layout more cache friendly
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r5316 | vlnb | 2014-02-26 04:49:38 +0200 (Wed, 26 Feb 2014) | 5 lines
scst_vdisk: Make vendor, product ID and related fields configurable via sysfs
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
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r5320 | bvassche | 2014-03-02 10:49:50 +0200 (Sun, 02 Mar 2014) | 1 line
Documentation spelling fix: change INQUERY into INQUIRY
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git-svn-id: http://svn.code.sf.net/p/scst/svn/branches/iser@5321 d57e44dd-8a1f-0410-8b47-8ef2f437770f
101 lines
4.4 KiB
Plaintext
101 lines
4.4 KiB
Plaintext
IBM Virtual SCSI Target (ibmvstgt)
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==================================
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Introduction
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------------
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The virtual SCSI (VSCSI) protocol as defined in [2] is a protocol that allows
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one logical partition (LPAR) to access SCSI targets provided by another LPAR.
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The LPAR that provides one or more SCSI targets is called the VIO server or
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VIOS. The ibmvstgt driver is a VIOS driver that makes it possible to access
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exported target devices via the VSCSI protocol.
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Setup
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-----
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After having configured the LPARs, boot the LPARs and load the ibmvstgt kernel
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module in the VIOS. After the target driver has been loaded, verify that a
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message similar to the following appears in the initiator kernel log:
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ibmvscsi 30000028: partner initialized
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ibmvscsi 30000028: host srp version: 16.a, host partition VIOS3-P6 (40), OS 2, max io 67108864
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ibmvscsi 30000028: sent SRP login
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ibmvscsi 30000028: SRP_LOGIN succeeded
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In the above log messages, the number 30000028 refers to the VIOS. The last
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two digits, 0x28, refer to the VIOS partition number (0x28 = 40).
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The next step is to decide which SCSI devices to export. Here is an example of
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a configuration in which 16 RAM disks have been exported (see also [1] for
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more information):
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# ls /sys/kernel/scst_tgt/devices
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2:0:0:0 ram000 ram001 ram002 ram003 ram004 ram005 ram006 ram007
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ram008 ram009 ram010 ram011 ram012 ram013 ram014 ram015
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Next, set the vendor ID, product ID etc. fields via sysfs. These fields
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must be set to the following values to allow AIX initiators to recognize
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SCST devices:
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* The Vendor ID (t10_vend_id) must be set to "IBM".
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* The Product ID (prod_id) must be set either to "VDASD blkdev" for SCSI disks
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or "VOPTA blkdev" for a SCSI CD-ROM.
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* The Product Revision Level (prod_rev_lvl) must be set to "0001".
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* The Vendor Specific Information in the INQUIRY response (inq_vend_specific)
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must be set to the serial number. The serial number is available in the
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"usn" sysfs attribute.
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After this step a LUN has to be assigned to each exported SCSI device. Some
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non-Linux initiator operating systems only accept LUN numbes that are
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multiples of 256 and require that the LUN addressing method is used.
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Assigning LUN numbers is possible e.g. as follows:
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lun=0
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for name in ram000 ram001 ram002 ram003 ram004 ram005 ram006 ram007 \
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ram008 ram009 ram010 ram011 ram012 ram013 ram014 ram015
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do
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lun=$((lun+256))
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echo "add $name $lun" \
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>/sys/kernel/scst_tgt/targets/ibmvstgt/ibmvstgt_target_0/luns/mgmt
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done
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echo 1 >/sys/kernel/scst_tgt/targets/ibmvstgt/ibmvstgt_target_0/enabled
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The result of the above commands will be as follows:
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# cat /sys/kernel/scst_tgt/targets/ibmvstgt/ibmvstgt_target_0/addr_method
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LUN
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# ls /sys/kernel/scst_tgt/targets/ibmvstgt/ibmvstgt_target_0/luns
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256 512 768 1024 1280 1536 1792 2048 2304 2560 2816 3072 3328 3584 3840 4096
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mgmt
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# cat /sys/kernel/scst_tgt/targets/ibmvstgt/ibmvstgt_target_0/enabled
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1
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After SCST has been configured, make the new configuration available to the
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initiator by rescanning the SCSI bus, e.g. as follows:
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# rescan-scsi-bus --hosts=2 --ids=0-31
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# lsscsi 2:
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[2:0:1:0] disk IBM VDASD blkdev 0001 /dev/sdb
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[2:0:2:0] disk IBM VDASD blkdev 0001 /dev/sdc
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[2:0:3:0] disk IBM VDASD blkdev 0001 /dev/sdd
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[2:0:4:0] disk IBM VDASD blkdev 0001 /dev/sde
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[2:0:5:0] disk IBM VDASD blkdev 0001 /dev/sdf
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[2:0:6:0] disk IBM VDASD blkdev 0001 /dev/sdg
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[2:0:7:0] disk IBM VDASD blkdev 0001 /dev/sdh
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[2:0:8:0] disk IBM VDASD blkdev 0001 /dev/sdi
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[2:0:9:0] disk IBM VDASD blkdev 0001 /dev/sdj
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[2:0:10:0] disk IBM VDASD blkdev 0001 /dev/sdk
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[2:0:11:0] disk IBM VDASD blkdev 0001 /dev/sdl
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[2:0:12:0] disk IBM VDASD blkdev 0001 /dev/sdm
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[2:0:13:0] disk IBM VDASD blkdev 0001 /dev/sdn
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[2:0:14:0] disk IBM VDASD blkdev 0001 /dev/sdo
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[2:0:15:0] disk IBM VDASD blkdev 0001 /dev/sdp
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[2:0:16:0] disk IBM VDASD blkdev 0001 /dev/sdq
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References
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----------
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[1] SCST Configuration Interface, Documentation/scst/README.scst.
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[2] Power.org Standard for Power Architecture Platform Requirements (PAPR)
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(Workstation, Server), Version 2.4, December 7, 2009, http://www.power.org.
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[3] Virtual I/O (VIO) and Virtualization, IBM Developerworks, 2010,
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http://www.ibm.com/developerworks/wikis/display/virtualization/VIO.
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