| cd10502b8276b0486850685383243cbd26d50c8d |
|
11-Apr-2012 |
Julia Lawall <Julia.Lawall@lip6.fr> |
[S390] drivers/s390/block/dasd_eckd.c: add missing dasd_sfree_request
Extend some error paths to call dasd_sfree_request as done earlier in the
function. The error-handling code is also moved to the end of the function.
Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| 25e2cf1c1ac52d5078cf8cc3fd2f2ad084669ddd |
|
11-Mar-2012 |
Stefan Haberland <stefan.haberland@de.ibm.com> |
[S390] dasd: prevent validate server for offline devices
Calling validate server on devices in offline processing may cause
an OOPS in the dasd_sleep_on function.
Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com>
Reviewed-by: Stefan Weinhuber <wein@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| 048cd4e51d24ebf7f3552226d03c769d6ad91658 |
|
27-Feb-2012 |
Heiko Carstens <heiko.carstens@de.ibm.com> |
compat: fix compile breakage on s390
The new is_compat_task() define for the !COMPAT case in
include/linux/compat.h conflicts with a similar define in
arch/s390/include/asm/compat.h.
This is the minimal patch which fixes the build issues.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
/drivers/s390/block/dasd_eckd.c
|
| f16330316321d1c388d13096f6858f5d2dac29dc |
|
18-Jan-2012 |
Stefan Haberland <stefan.haberland@de.ibm.com> |
[S390] dasd: revalidate server for new pathgroup
If a pathgroup is established we get an event and have to revalidate
the server to propagate supported features like PAV and enable them.
Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| f9f8d02fae0dc47d8868fd069bb88d12f8d1d71f |
|
18-Jan-2012 |
Stefan Haberland <stefan.haberland@de.ibm.com> |
[S390] dasd: revert LCU optimization
Remove the optimization that validate server is only called once per
LCU. If a device is set online we only know that we already know the
LCU. But if the pathgroup was lost in between we have to do a
validate server again to activate some features.
Since we have no indication when a pathgroup gets lost we have to do
a validate server every time a device is set online.
Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| b38f27e8425a132ed2dc49ffb3741404e81363d8 |
|
27-Dec-2011 |
Stefan Haberland <stefan.haberland@de.ibm.com> |
[S390] dasd: fix fixpoint divide exception in define_extent
If an IO request is build on an alias device without prefix enabled
we try to calculate with zero data from the alias device. This
triggers a BUG statement with fixpoint divide exception.
This case is very unlikely and can only happen if the pathgroup is
lost with an alias device already in use.
Prevent the alias device from being used in this case.
Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| b206181d636d416fde48c7f493d7ac5d935b57e3 |
|
27-Dec-2011 |
Stefan Haberland <stefan.haberland@de.ibm.com> |
[S390] dasd: add sanity check to detect path connection error
Prevents possible data corruption by detecting cabling error.
Therefor read and compare the UID for all available channel paths.
Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| 246ccea184423ccdec3be1ca3d400cc3c547404d |
|
30-Oct-2011 |
Martin Schwidefsky <schwidefsky@de.ibm.com> |
[S390] sparse: fix sparse NULL pointer warnings
Fix two NULL pointer warnings in the dasd driver:
drivers/s390/block/dasd_eckd.c:2353:20: warning: Using plain integer as NULL pointer
drivers/s390/block/dasd_eckd.c:2415:44: warning: Using plain integer as NULL pointer
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| c8d1c0ff840bbf06c60ff4235202a4b1457d8f59 |
|
30-Oct-2011 |
Stefan Haberland <stefan.haberland@de.ibm.com> |
[S390] dasd: prevent path verification before resume
Mark the device as suspended and delay execution of the path
verification worker to prevent mix-up.
Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| 5915a873fcb1cea5260940be519f2cdf898f7be3 |
|
30-Oct-2011 |
Stefan Haberland <stefan.haberland@de.ibm.com> |
[S390] dasd: re-initialize read_conf buffer for retries
The buffer for read configuration data has to be initialized with an
EBCDIC string to show support for extended UIDs to z/VM.
If this read configuration data CQR needs to be retried, the buffer
may have changed in between. So re-initialize the buffer to get a
correct extended UID under z/VM.
Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| de400d6b78d15a73023485f050bc6b1709dc7a79 |
|
30-Oct-2011 |
Peter Oberparleiter <peter.oberparleiter@de.ibm.com> |
[S390] fix mismatch in summation of I/O IRQ statistics
Current IRQ statistics support does not show detail counts for I/O
interrupts which are processed internally only. The result is a
summation count which is way off such as this one:
CPU0 CPU1 CPU2
I/O: 1331 710 442
[...]
QAI: 15 16 16 [I/O] QDIO Adapter Interrupt
QDI: 1 0 0 [I/O] QDIO Interrupt
DAS: 706 645 381 [I/O] DASD
C15: 26 10 0 [I/O] 3215
C70: 0 0 0 [I/O] 3270
TAP: 0 0 0 [I/O] Tape
VMR: 0 0 0 [I/O] Unit Record Devices
LCS: 0 0 0 [I/O] LCS
CLW: 0 0 0 [I/O] CLAW
CTC: 0 0 0 [I/O] CTC
APB: 0 0 0 [I/O] AP Bus
Fix this by moving I/O interrupt accounting into the common I/O layer.
Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| 34cd551a31cd4e35cd3f9ed9f13bb46b4ee98508 |
|
03-Aug-2011 |
Stefan Haberland <stefan.haberland@de.ibm.com> |
[S390] dasd: check if raw track access is supported
To use raw track access some special storage server commands are
needed. Older storage hardware may not support these commands.
So check if raw track access is possible while setting the DASD
online.
Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| 364c18d817a6beb3303e6b8f28ea37d9c06ff382 |
|
23-May-2011 |
Heiko Carstens <heiko.carstens@de.ibm.com> |
[S390] dasd: fix return code handling
Check return value of itcw_add_dcw() for error code and return it.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| 7712f83aa904fef0d7d6e5ba7684c3272bddbb19 |
|
23-May-2011 |
Heiko Carstens <heiko.carstens@de.ibm.com> |
[S390] get rid of unused variables
Remove trivially unused variables as detected with -Wunused-but-set-variable.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| c7a29e56f0a3526b71e9694b403b8e2cbe9c31e5 |
|
20-Apr-2011 |
Stefan Weinhuber <wein@de.ibm.com> |
[S390] dasd: check sense type in device change handler
When evaluating sense data in dasd_eckd_check_for_device_change, we
must always check for the type of sense data in byte 27, bit 0, to
make sure that the rest of the sense data is interpreted correctly.
Signed-off-by: Stefan Weinhuber <wein@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| 25985edcedea6396277003854657b5f3cb31a628 |
|
31-Mar-2011 |
Lucas De Marchi <lucas.demarchi@profusion.mobi> |
Fix common misspellings
Fixes generated by 'codespell' and manually reviewed.
Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
/drivers/s390/block/dasd_eckd.c
|
| 3bda058b0c39fc72188116d2fd71af08dd0fe5b0 |
|
23-Mar-2011 |
Sebastian Ott <sebott@linux.vnet.ibm.com> |
[S390] ccw_driver: remove duplicate members
Remove the owner and name members of struct
ccw_driver and convert all drivers to store
this data in the embedded struct device_driver.
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| d54cddb620fa493968111f479029dcd910fcb921 |
|
15-Mar-2011 |
Heiko Carstens <heiko.carstens@de.ibm.com> |
[S390] dasd: get rid of compile warning
Get rid of this:
drivers/s390/block/dasd_eckd.c: In function 'dasd_eckd_build_cp_tpm_track.clone.8':
drivers/s390/block/dasd_eckd.c:2589:34: warning: 'len_to_track_end' may be used uninitialized in this function
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| 5da24b7627ff821e154a3aaecd5d60e1d8e228a5 |
|
17-Feb-2011 |
Stefan Haberland <stefan.haberland@de.ibm.com> |
[S390] dasd: correct device table
The 3880 storage control unit supports a 3380 device
type, but not a 3390 device type.
Reported-by: Stephen Powell <zlinuxman@wowway.com>
Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| e4dbb0f2b5dd6a836d0e5c60aa5f573e0bbcf76a |
|
05-Jan-2011 |
Stefan Haberland <stefan.haberland@de.ibm.com> |
[S390] dasd: Add support for raw ECKD access.
Normal I/O operations through the DASD device driver give only access
to the data fields of an ECKD device even for track based I/O.
This patch extends the DASD device driver to give access to whole
ECKD tracks including count, key and data fields.
Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| 5a27e60dec59a95bd7f8ae9a19ae2ede4f76395b |
|
05-Jan-2011 |
Stefan Weinhuber <wein@de.ibm.com> |
[S390] dasd: Improve handling of stolen DASD reservation
If a DASD device has been reserved by a Linux system, and later
this reservation is ‘stolen’ by a second system by means of an
unconditional reserve, then the first system receives a
notification about this fact. With this patch such an event can
be either ignored, as before, or it can be used to let the device
fail all I/O request, so that the device will not block anymore.
Signed-off-by: Stefan Weinhuber <wein@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| a4d26c6aeceea330ee5e0fb6b017d57e3b252d29 |
|
05-Jan-2011 |
Stefan Weinhuber <wein@de.ibm.com> |
[S390] dasd: do path verification for paths added at runtime
When a new path is added at runtime, the CIO layer will call the drivers
path_event callback. The DASD device driver uses this callback to trigger
a path verification for the new path. The driver will use only those
paths for I/O, which have been successfully verified.
Signed-off-by: Stefan Weinhuber <wein@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| ef19298b406f93af4bb249f0776deb8366e97532 |
|
05-Jan-2011 |
Stefan Weinhuber <wein@de.ibm.com> |
[S390] dasd: add High Performance FICON multitrack support
Some storage systems support multitrack High Performance FICON
requests, which read or write data to more than one track.
This patch enables the DASD device driver to generate multitrack
High Performance FICON requests.
Signed-off-by: Stefan Weinhuber <wein@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| 196339f1733726ffd69ab81ec1c66678585f5846 |
|
29-Oct-2010 |
Stefan Weinhuber <wein@de.ibm.com> |
[S390] dasd: provide a Sense Path Group ID ioctl
The BIODASDSNID ioctl executes a 'Sense Path Group ID'
command on a DASD ECKD device. The returned path group data
allows user space programs to determine path state and
path group ID of the channel paths to the device.
Signed-off-by: Stefan Weinhuber <wein@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| a5a0061fb3a22bbd9b108af8382142fd0f41ebee |
|
25-Oct-2010 |
Stefan Weinhuber <wein@de.ibm.com> |
[S390] dasd: fix unsolicited interrupt recognition
The dasd interrupt handler needs to distinguish solicited from
unsolicited interrupts, as unsolicited interrupts may require special
handling (e.g. summary unit checks) and solicited interrupts require
proper error recovery for the failed I/O request.
The interrupt handler needs to check several bit fields in the
interrupt response block (irb) to make this distinction.
So far our check of the status control bits has not been specific
enough, which may lead to a failed request getting just retried
instead of the necessary error recovery.
Signed-off-by: Stefan Weinhuber <wein@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| ed3640b285d831065eb0507cdca7d125f6f78e8d |
|
25-Oct-2010 |
Stefan Haberland <stefan.haberland@de.ibm.com> |
[S390] dasd fix dump_sense_dbf
The dasd_eckd_dump_sense_dbf function uses a macro for s390 debug
feature that can handle up to 8 parameters (for the DASD device
driver).
Fix the function to use only the maximum number of parameters.
Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| 817f2c842d6c38acfd58d20d29ba583ec467ae35 |
|
20-Sep-2010 |
Nikanth Karthikesan <knikanth@suse.de> |
Fix various typos of valid in comments
Fix various typos of valid.
Signed-off-by: Nikanth Karthikesan <knikanth@suse.de>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
/drivers/s390/block/dasd_eckd.c
|
| 7c8faa86290c1a2607d6b768a0b874ec392a5c2a |
|
09-Aug-2010 |
Stefan Haberland <stefan.haberland@de.ibm.com> |
[S390] dasd: tunable missing interrupt handler
This feature provides a user interface to specify the timeout for
missing interrupts for standard I/O operations.
Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| f932bcea6b7317312ab38df12a84710fc6c67a81 |
|
09-Aug-2010 |
Stefan Weinhuber <wein@de.ibm.com> |
[S390] dasd: allocate fallback cqr for reserve/release
The DASD reserve and release ioctls use the preallocated memory pool
of the respective device to build their CCW requests. However, when
the device is busy, the pool may already be empty and the ioctl fails.
Usually this can be recovered by calling the ioctl again, but in
a situation in which we need to issue an unconditional reserve to
make a device operational again, this would be not recoverable.
To avoid a failure due to lack of memory, DASD device driver will
preallocate enough memory for a single reserve/release request, which
can be used if normal allocation fails.
Signed-off-by: Stefan Weinhuber <wein@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| a23ed009a726feeafdbabeaf5f0bde1a3f04d121 |
|
26-May-2010 |
Stefan Haberland <stefan.haberland@de.ibm.com> |
[S390] dasd: unit check handling during internal cio I/O
React on unit checks during cio internal I/O.
Handle as unsolicited interrupt and advice cio to retry.
Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| 2dedf0d9eadf39660f2e1686b5d36e4a7515803f |
|
17-May-2010 |
Stefan Haberland <stefan.haberland@de.ibm.com> |
[S390] dasd: remove uid from devmap
Remove the duplicate of the DASD uid from the devmap structure.
Use the uid from the device private structure instead.
This also removes a lockdep warning complaining about a possible
SOFTIRQ-safe -> SOFTIRQ-unsafe lock order.
Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| 501183f2ed74434e30a1b039b2f3af30f1f3f461 |
|
17-May-2010 |
Stefan Haberland <stefan.haberland@de.ibm.com> |
[S390] dasd: add dynamic pav toleration
For base Parallel Access Volume (PAV) there is a fixed mapping of
base and alias devices. With dynamic PAV this mapping can be changed
so that an alias device is used with another base device.
This patch enables the DASD device driver to tolerate dynamic PAV
changes.
Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| b8fde7224d771ce55bfd67cb57d7c4c8f430972f |
|
24-Mar-2010 |
Stefan Haberland <stefan.haberland@de.ibm.com> |
[S390] dasd: check tsb validity
Check tsb validity before the tcw_get_tsb function is called.
Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| 33b62a30f78536b976183cc764c08038ac011e0a |
|
08-Mar-2010 |
Stefan Weinhuber <wein@de.ibm.com> |
[S390] dasd: automatic recognition of read-only devices
In z/VM it is possible to attach a device as read-only. To prevent
unintentional write requests and subsequent I/O errors, we can detect
this configuration using the z/VM DIAG 210 interface and set the
respective linux block device to read-only as well.
Signed-off-by: Stefan Weinhuber <wein@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| 52898025cf7d458d029c18773d0ef49b4789d829 |
|
08-Mar-2010 |
Nigel Hislop <hislop_nigel@emc.com> |
[S390] dasd: security and PSF update patch for EMC CKD ioctl
Remove the PSF order/suborder check from the Symmetrix CKD dasd ioctl.
In exchange restrict the ioctl to CAP_SYS_ADMIN and CAP_SYS_RAWIO.
Signed-off-by: Nigel Hislop <hislop_nigel@emc.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| 294001a80c9810e2fe27aaaad7df8be12a103065 |
|
27-Jan-2010 |
Stefan Haberland <stefan.haberland@de.ibm.com> |
[S390] dasd: fix possible NULL pointer errors
Fix possible NULL pointer in DASD messages and correct discipline
checking.
Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| f8b068593db4a4184c8963fcd5a7f34584fde8ad |
|
13-Jan-2010 |
Heiko Carstens <heiko.carstens@de.ibm.com> |
[S390] dasd: add proper compat pointer conversion for symmetrix ioctl
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| f4ac1d0255748fe0f8e128a26b1c29490cae5c08 |
|
07-Dec-2009 |
Stefan Weinhuber <wein@de.ibm.com> |
[S390] dasd: let device initialization wait for LCU setup
The first DASD that is set online for a specific logical control unit
has to do certain setup steps on the storage server to make full use
of it, for example it will enable PAV.
The features and characteristics reported by the storage server will
depend on this setup, so all other devices on the same LCU will need
to wait for the setup to be finished.
Signed-off-by: Stefan Weinhuber <wein@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| b8ed5dd54895647c2690575aad6f07748c2c618a |
|
07-Dec-2009 |
Stefan Haberland <stefan.haberland@de.ibm.com> |
[S390] dasd: remove strings from s390dbf
Remove strings from s390 debugfeature entries that could lead to a
crash when the data is read from dbf because the strings do not exist
any more.
Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| eb6e199bef288611157b8198c25d12b32bf058d0 |
|
07-Dec-2009 |
Stefan Weinhuber <wein@de.ibm.com> |
[S390] dasd: improve error recovery for internal I/O
Most of the error conditions reported by a FICON storage server
indicate situations which can be recovered. Sometimes the host just
needs to retry an I/O request, but sometimes the recovery
is more complex and requires the device driver to wait, choose
a different path, etc.
The DASD device driver has a fully featured error recovery
for normal block layer I/O, but not for internal I/O request which
are for example used during the device bring up.
This can lead to situations where the IPL of a system fails because
DASD devices are not properly recognized.
This patch will extend the internal I/O handling to use the existing
error recovery procedures.
Signed-off-by: Stefan Weinhuber <wein@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| 626350b63ef2cd447023d3dc2a34eaa7ca01bfff |
|
07-Dec-2009 |
Stefan Weinhuber <wein@de.ibm.com> |
[S390] dasd: enable prefix independent of pav support
The DASD device driver needs to explicitly enable the prefix command
on the storage server, before it can be used. Originally we enabled
this command along with others only if we wanted to support PAV.
However, today we require this command for other features like
High Performance FICON as well, so we need to always enable prefix.
Signed-off-by: Stefan Weinhuber <wein@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| 779c27820a6bd53523a34551aa6004045a060dcf |
|
07-Dec-2009 |
Christian Borntraeger <borntraeger@de.ibm.com> |
[S390] dasd: remove dead code
the todclk.h header file is dead code. Remove it.
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| 454e1fa1ebae7cff707b2e3f12b775c263c8408b |
|
07-Dec-2009 |
Peter Oberparleiter <peter.oberparleiter@de.ibm.com> |
[S390] cio: split PGID settings and status
Split setting (driver wants feature enabled) and status (feature
setup was successful) for PGID related ccw device features so that
setup errors can be detected. Previously, incorrectly handled setup
errors could in rare cases lead to erratic I/O behavior and
permanently unusuable devices.
Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| a7602f6c16b2de2962b279980693ad1b3711e84a |
|
14-Oct-2009 |
Stefan Haberland <stefan.haberland@de.ibm.com> |
[S390] dasd: fix locking bug
Replace spin_lock with spin_lock_irqsave in dasd_eckd_restore_device.
Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| 6fca97a958bc3c67566aa91eafc6a5be2e66d6b3 |
|
06-Oct-2009 |
Stefan Haberland <stefan.haberland@de.ibm.com> |
[S390] dasd: fix race condition in resume code
There is a race while re-reading the device characteristics. After
cleaning the memory area a cqr is build which reads the device
characteristics. This may take a rather long time and the device
characteristics structure is zero during this. Now it could be
possible that the block tasklet starts working and a new cqr will be
build. The build_cp command refers to the device characteristics
structure and this may lead into a divide by zero exception.
Fix this by re-reading the device characteristics into a temporary
structur and copy the data to the original structure. Also take the
ccwdev_lock.
Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| 9fd815b55f31be48dbb3dd23922587d247a4e497 |
|
23-Sep-2009 |
Linus Torvalds <torvalds@linux-foundation.org> |
Merge branch 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6
* 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6: (22 commits)
[S390] Update default configuration.
[S390] hibernate: Do real CPU swap at resume time
[S390] dasd: tolerate devices that have no feature codes
[S390] zcrypt: Do not add/remove devices in s/r callbacks
[S390] hibernate: make sure pfn_is_nosave handles lowcore pages
[S390] smp: introduce LC_ORDER and simplify lowcore handling
[S390] ptrace: use common code for simple peek/poke operations
[S390] fix disabled_wait inline assembly clobber list
[S390] Change kernel_page_present coding style.
[S390] hibernation: reset system after resume
[S390] hibernation: fix guest page hinting related crash
[S390] Get rid of init_module/delete_module compat functions.
[S390] Convert sys_execve to function with parameters.
[S390] Convert sys_clone to function with parameters.
[S390] qdio: change state of all primed input buffers
[S390] qdio: reduce per device debug messages
[S390] cio: introduce consistent subchannel scanning
[S390] cio: idset use actual number of ssids
[S390] cio: dont kfree vmalloced memory
[S390] cio: introduce css_settle
...
|
| 68d1e5f08b13132504752cad54169376739753db |
|
22-Sep-2009 |
Stefan Weinhuber <wein@de.ibm.com> |
[S390] dasd: tolerate devices that have no feature codes
The DASD device driver reads the feature codes of a device during
device initialization. These codes are later used to determine the
availability of advanced features like PAV or High Performance FICON.
Some very old devices do not support the command to read feature
codes and the initialization routine fails.
As the feature codes are not necessary for basic DASD operations, we
can support such devices by just ignoring missing feature codes.
Signed-off-by: Stefan Weinhuber <wein@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| a419aef8b858a2bdb98df60336063d28df4b272f |
|
18-Aug-2009 |
Joe Perches <joe@perches.com> |
trivial: remove unnecessary semicolons
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
/drivers/s390/block/dasd_eckd.c
|
| ca99dab01dd63dcc413395bd3e75b0be152dfefc |
|
11-Sep-2009 |
Stefan Haberland <stefan.haberland@de.ibm.com> |
[S390] dasd: fix message naming
This patch fixes message naming so that generic dasd messages do not
contain the device discipline. For this purpose the dev_ makros are
replaced by pr_ makros for generic dasd messages.
Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| 68b781fe1bed89011ab7c58ede8476abe64432d2 |
|
11-Sep-2009 |
Stefan Haberland <stefan.haberland@de.ibm.com> |
[S390] dasd: optimize cpu usage in goodcase
remove unnecessary dbf call, remove string operations for magic
Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| aeec92ca3a1d5ca96efe76988fd4df943a90300d |
|
07-Jul-2009 |
Stefan Haberland <stefan.haberland@de.ibm.com> |
[S390] dasd: correct debugfeature sense dump
remove loop, add some debug data and use get_sense function
Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| e6125fba81e362d9b314d10893af1d9dc5658f33 |
|
22-Jun-2009 |
Stefan Haberland <stefan.haberland@de.ibm.com> |
[S390] dasd_pm: fix stop flag handling
The stop flags are handled in the generic restore function so the
stop flag is removed also for FBA and DIAG devices.
Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| d41dd122acf960db78c9ddc87684b43751dd36d9 |
|
16-Jun-2009 |
Stefan Haberland <stefan.haberland@de.ibm.com> |
[S390] pm: dasd power management callbacks.
Introduce the power management callbacks to the dasd driver. On suspend
the dasd devices are stopped and removed from the focus of alias
management.
On resume they are reinitialized by rereading the device characteristics
and adding the device to the alias management.
In case the device has gone away during suspend it will caught in the
suspend state with stopped flag set to UNRESUMED. After it appears again
the restore function is called again.
Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| 6cc7f168954fe8b3d8988a90b2478a9c11c5ebcb |
|
12-Jun-2009 |
Stefan Weinhuber <wein@de.ibm.com> |
[S390] dasd: forward internal errors to dasd_sleep_on caller
If a DASD requests is started with dasd_sleep_on and fails, then the
calling function may need to know the reason for the failure.
In cases of hardware errors it can inspect the sense data in the irb,
but when the reason is internal (e.g. start_IO failed) then it needs
a meaningfull return code.
Signed-off-by: Stefan Weinhuber <wein@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| 736e6ea0bf97ec79521f88704ce8506e5d60d078 |
|
12-Jun-2009 |
Sebastian Ott <sebott@linux.vnet.ibm.com> |
[S390] dasd: sync after async probe
Some functions called as a late_initcall depend on completely
initialized devices. Since commit
f3445a1a656bc26b07946cc6d20de1ef07c8d116 the dasd driver uses the
new async framework and relies on the fact that synchronization is
done in prepare_namespace which is called after the late_initcalls.
Fix this by calling async_synchronize_full at the end of the related
init functions.
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| 92636b152f3b58e459988934f689619af9e04dbc |
|
12-Jun-2009 |
Sebastian Ott <sebott@linux.vnet.ibm.com> |
[S390] dasd: check_characteristics cleanup
Fix a broken memset (sizeof pointer vs sizeof the underlying
structure) by cleaning up the involved functions.
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| 45b44d76d373e66d08e0c745dc82ff9123103588 |
|
12-Jun-2009 |
Stefan Weinhuber <wein@de.ibm.com> |
[S390] dasd: no High Performance FICON in 31-bit mode
The High Performance FICON feature is not supported in 31-bit mode,
no matter what the various flags say. So we need to check for the
CONFIG_64BIT option as well.
Signed-off-by: Stefan Weinhuber <wein@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| 83096ebf1263b2c1ee5e653ba37d993d02e3eb7b |
|
07-May-2009 |
Tejun Heo <tj@kernel.org> |
block: convert to pos and nr_sectors accessors
With recent cleanups, there is no place where low level driver
directly manipulates request fields. This means that the 'hard'
request fields always equal the !hard fields. Convert all
rq->sectors, nr_sectors and current_nr_sectors references to
accessors.
While at it, drop superflous blk_rq_pos() < 0 test in swim.c.
[ Impact: use pos and nr_sectors accessors ]
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Tested-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Tested-by: Adrian McMenamin <adrian@mcmen.demon.co.uk>
Acked-by: Adrian McMenamin <adrian@mcmen.demon.co.uk>
Acked-by: Mike Miller <mike.miller@hp.com>
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
Cc: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Cc: Borislav Petkov <petkovbb@googlemail.com>
Cc: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Cc: Eric Moore <Eric.Moore@lsi.com>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: Pete Zaitcev <zaitcev@redhat.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Paul Clements <paul.clements@steeleye.com>
Cc: Tim Waugh <tim@cyberelk.net>
Cc: Jeff Garzik <jgarzik@pobox.com>
Cc: Jeremy Fitzhardinge <jeremy@xensource.com>
Cc: Alex Dubov <oakad@yahoo.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Dario Ballabio <ballabio_dario@emc.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: unsik Kim <donari75@gmail.com>
Cc: Laurent Vivier <Laurent@lvivier.info>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
/drivers/s390/block/dasd_eckd.c
|
| 52db45c3c55a0fca53077dfd7b123e30cd210aad |
|
14-Apr-2009 |
Stefan Weinhuber <wein@de.ibm.com> |
[S390] dasd: fix idaw boundary checking for track based ccw
A ccw command that reads or writes several records at once will
usually transfer more data then fits into one page and needs to
address memory areas using a list of indirect data address words
(idaw). All but the first of these areas must start on a 4KB or 2KB
block boundary (depending on the idaw format).
A check for this restriction was missing and has been added with
this patch.
Signed-off-by: Stefan Weinhuber <wein@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| fc19f381b3828aa4f8a3417dbefc3418ec6bbe10 |
|
26-Mar-2009 |
Stefan Haberland <stefan.haberland@de.ibm.com> |
[S390] dasd: message cleanup
Moved some Messages into s390 debug feature and changed remaining
messages to use the dev_xxx and pr_xxx macros.
Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| f3eb5384cf0325c02e306b1d81e70f81a03d7432 |
|
26-Mar-2009 |
Stefan Weinhuber <wein@de.ibm.com> |
[S390] dasd: add High Performance FICON support
To support High Performance FICON, the DASD device driver has to
translate I/O requests into the new transport mode control words (TCW)
instead of the traditional (command mode) CCW requests.
Signed-off-by: Stefan Weinhuber <wein@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| b44b0ab3bac16356f03e94b1b49ba9305710c445 |
|
26-Mar-2009 |
Stefan Weinhuber <wein@de.ibm.com> |
[S390] dasd: add large volume support
The dasd device driver will now support ECKD devices with more then
65520 cylinders.
In the traditional ECKD adressing scheme each track is addressed
by a 16-bit cylinder and 16-bit head number. The new addressing
scheme makes use of the fact that the actual number of heads is
never larger then 15, so 12 bits of the head number can be redefined
to be part of the cylinder address.
Signed-off-by: Stefan Weinhuber <wein@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| f9a28f7bc5225af476f8d4bb669038da8801b7c4 |
|
26-Mar-2009 |
Jean-Baptiste Joret <joret@de.ibm.com> |
[S390] dasd_eckd / Write format R0 is now allowed BB
Permission is now granted to the subsystem to format write R0 with:
* an ID = CCHHR, where CC = physical cylinder number,
HH = physical head number, and R = 0
* a key length of zero
* a data length of eight
* a data field containing all zeros
Signed-off-by: Jean-Baptiste Joret <joret@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| 13de227bcd80fbdaeebe1f31154487dddb7d5b1e |
|
09-Jan-2009 |
Holger Smolinski <Holger.Smolinski@de.ibm.com> |
[S390] dasd: add device attribute to disable blocking on lost paths
When the connection between host and storage server is lost, the
dasd device driver usually blocks all I/O on affected devices and
waits for them to reappear. In some setups however it would be
better if the I/O is returned as error so that device can be
recovered by some other means, eg. in a raid or multipath setup.
Signed-off-by: Holger Smolinski <Holger.Smolinski@de.ibm.com>
Signed-off-by: Stefan Weinhuber <wein@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| 50afd20f8c3ce23994a21c389e7250e54a93bf55 |
|
25-Dec-2008 |
Stefan Haberland <stefan.haberland@de.ibm.com> |
[S390] dasd: correct sense byte condition for SIM
SIM sense data are always 32 bit sense data so sense byte 27 bit 0
has not to be set.
Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| 6000a368cd8e6da1caf101411bdb494cd6fb8b09 |
|
20-Aug-2008 |
Mike Christie <michaelc@cs.wisc.edu> |
[SCSI] block: separate failfast into multiple bits.
Multipath is best at handling transport errors. If it gets a device
error then there is not much the multipath layer can do. It will just
access the same device but from a different path.
This patch breaks up failfast into device, transport and driver errors.
The multipath layers (md and dm mutlipath) only ask the lower levels to
fast fail transport errors. The user of failfast, read ahead, will ask
to fast fail on all errors.
Note that blk_noretry_request will return true if any failfast bit
is set. This allows drivers that do not support the multipath failfast
bits to continue to fail on any failfast error like before. Drivers
like scsi that are able to fail fast specific errors can check
for the specific fail fast type. In the next patch I will convert
scsi.
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Cc: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
/drivers/s390/block/dasd_eckd.c
|
| ab1d848fd6a9151b02c6cbf4bddce6e24707b094 |
|
10-Oct-2008 |
Nigel Hislop <hislop_nigel@emc.com> |
[S390] Add ioctl support for EMC Symmetrix Subsystem Control I/O
EMC Symmetrix Subsystem Control I/O through CKD dasd requires a
specific parameter list sent to the array via a Perform Subsystem
Function CCW. The Symmetrix response is retrieved from the array
via a Read Subsystem Data CCW.
Signed-off-by: Nigel Hislop <hislop_nigel@emc.com>
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| ada3df9171e48b2a5f1e9c828337b61746e19ff0 |
|
10-Oct-2008 |
Stefan Haberland <stefan.haberland@de.ibm.com> |
[S390] dasd: fix message flood for unsolicited interrupts
In the unsolicited interupt handler fake IRBs from CIO have to be
ignored because there is nothing to do.
The function dump_sense should not be called if there is no sense
data available.
Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| 2a0217d5c7d22d6dd28f8ae5d20b06d24dc426b8 |
|
10-Oct-2008 |
Kay Sievers <kay.sievers@vrfy.org> |
[S390] bus_id -> dev_name conversions
bus_id -> dev_name() conversions in s390 code.
[cornelia.huck@de.ibm.com: minor adaptions]
Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
Cc: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| 4abb08c24b5fa7b6ad0807c07077f0f216f6788b |
|
01-Aug-2008 |
Stefan Weinhuber <wein@de.ibm.com> |
[S390] dasd: Add support for enhanced VM UID
When z/VM provides two virtual devices (minidisks) that reside on the
same real device, both will receive the configuration data from the
real device and thus get the same uid. To fix this problem, z/VM
provides an additional configuration data record that allows to
distinguish between minidisks.
z/VM APAR VM64273 needs be installed so this fix has an effect.
Signed-off-by: Stefan Weinhuber <wein@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| 9d853caf44e6f969a9ad056a9937e8d97bc2c761 |
|
17-Jul-2008 |
Stefan Haberland <stefan.haberland@de.ibm.com> |
[S390] dasd: fix unsolicited SIM handling.
Add missing schedule_bh and check that there is 32 bit sense data.
Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| 23d805b647db6c2063a13089497615efa9deacdd |
|
14-Jul-2008 |
Peter Oberparleiter <peter.oberparleiter@de.ibm.com> |
[S390] cio: introduce fcx enabled scsw format
Extend the scsw data structure to the format required by fcx. Also
provide helper functions for easier access to fields which are present
in both the traditional as well as the modified format.
Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| f60c768c387026499bbdefdd807d9124ae2b3a8c |
|
17-Apr-2008 |
Stefan Haberland <stefan.haberland@de.ibm.com> |
[S390] dasd: add sim handling.
Now the system reports system information messages (SIM) to the user.
The System Reference Code (SRC) which is reported to the user gives
the abbility to lookup the reason of the SIM online in the
documentation of the storage server.
Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| 8e09f21574ea3028d5629e5de759e0b196c690c5 |
|
26-Jan-2008 |
Stefan Weinhuber <wein@de.ibm.com> |
[S390] dasd: add hyper PAV support to DASD device driver, part 1
Parallel access volumes (PAV) is a storage server feature, that allows
to start multiple channel programs on the same DASD in parallel. It
defines alias devices which can be used as alternative paths to the
same disk. With the old base PAV support we only needed rudimentary
functionality in the DASD device driver. As the mapping between base
and alias devices was static, we just had to export an identifier
(uid) and could leave the combining of devices to external layers
like a device mapper multipath.
Now hyper PAV removes the requirement to dedicate alias devices to
specific base devices. Instead each alias devices can be combined with
multiple base device on a per request basis. This requires full
support by the DASD device driver as now each channel program itself
has to identify the target base device.
The changes to the dasd device driver and the ECKD discipline are:
- Separate subchannel device representation (dasd_device) from block
device representation (dasd_block). Only base devices are block
devices.
- Gather information about base and alias devices and possible
combinations.
- For each request decide which dasd_device should be used (base or
alias) and build specific channel program.
- Support summary unit checks, which allow the storage server to
upgrade / downgrade between base and hyper PAV at runtime (support
is mandatory).
Signed-off-by: Stefan Weinhuber <wein@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| 5d67d164e6e2e7310cf4b682c418d70d59295eaf |
|
26-Jan-2008 |
Joe Perches <joe@perches.com> |
[S390] drivers/s390/: Spelling fixes
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| 6c92e699b56287da582ccb12a64b959b6d6109ba |
|
16-Aug-2007 |
Jens Axboe <jens.axboe@oracle.com> |
Fixup rq_for_each_segment() indentation
Remove one level of nesting where appropriate.
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
/drivers/s390/block/dasd_eckd.c
|
| 5705f7021748a69d84d6567e68e8851dab551464 |
|
25-Sep-2007 |
NeilBrown <neilb@suse.de> |
Introduce rq_for_each_segment replacing rq_for_each_bio
Every usage of rq_for_each_bio wraps a usage of
bio_for_each_segment, so these can be combined into
rq_for_each_segment.
We define "struct req_iterator" to hold the 'bio' and 'index' that
are needed for the double iteration.
Signed-off-by: Neil Brown <neilb@suse.de>
Various compile fixes by me...
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
/drivers/s390/block/dasd_eckd.c
|
| d133a9609ee6111c9718a4bbe559b84a399603e6 |
|
31-Jul-2007 |
Gabriel Craciunescu <nix.or.die@googlemail.com> |
Typo fixes errror -> error
Typo fixes errror -> error
Signed-off-by: Gabriel Craciunescu <nix.or.die@googlemail.com>
Cc: Jeff Garzik <jeff@garzik.org>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Stephen Smalley <sds@tycho.nsa.gov>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
/drivers/s390/block/dasd_eckd.c
|
| 763968e217c6657afaff90fbbec93531b3d6ce70 |
|
10-May-2007 |
Heiko Carstens <heiko.carstens@de.ibm.com> |
[S390] Avoid sparse warnings.
Monthly sparse warning avoidance patch. Sigh.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| 17283b56eceb6b7d9cc48dc74759a2450699c22a |
|
04-May-2007 |
Cornelia Huck <cornelia.huck@de.ibm.com> |
[S390] dasd: New read device characteristics and read configuration data.
Instead of the deprecated read_dev_chars() and read_conf_data_lpm(),
implement dasd_generic_read_dev_chars() and dasd_eckd_read_conf_lpm().
These should even recover better from error than the original cio
functions.
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| 4d284cac76d0bfebc42d76b428c4e44d921200a9 |
|
05-Feb-2007 |
Heiko Carstens <heiko.carstens@de.ibm.com> |
[S390] Avoid excessive inlining.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| d54853ef8cb17296ac7bce9c77430fb7c80532d0 |
|
05-Feb-2007 |
Martin Schwidefsky <schwidefsky@de.ibm.com> |
[S390] ETR support.
This patch adds support for clock synchronization to an external time
reference (ETR). The external time reference sends an oscillator
signal and a synchronization signal every 2^20 microseconds to keep
the TOD clocks of all connected servers in sync. For availability
two ETR units can be connected to a machine. If the clock deviates
for more than the sync-check tolerance all cpus get a machine check
that indicates that the clock is out of sync. For the lovely details
how to get the clock back in sync see the code below.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| 336c340b682daa283acf9202a07c4fd5c28e53a5 |
|
05-Feb-2007 |
Horst Hummel <horst.hummel@de.ibm.com> |
[S390] dasd: fix unconditional reserve handling.
The reserve/release IOCTLs sometimes do not work. If second system
does a 'steal lock' the pending unit check (Format 3 Msg F) is
delivered. Since ERP is disabled for reserve/release, the IOCTL call
fails. We have to allow basic ERP (retries) for reserve/release IOCTLs.
Signed-off-by: Horst Hummel <horst.hummel@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| 2b67fc46061b2171fb8fbb55d1ac717abd533569 |
|
05-Feb-2007 |
Heiko Carstens <heiko.carstens@de.ibm.com> |
[S390] Get rid of a lot of sparse warnings.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| 441e143e95f5aa1e04026cb0aa71c801ba53982f |
|
07-Dec-2006 |
Christoph Lameter <clameter@sgi.com> |
[PATCH] slab: remove SLAB_DMA
SLAB_DMA is an alias of GFP_DMA. This is the last one so we
remove the leftover comment too.
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
/drivers/s390/block/dasd_eckd.c
|
| 4aff5e2333c9a1609662f2091f55c3f6fffdad36 |
|
10-Aug-2006 |
Jens Axboe <axboe@suse.de> |
[PATCH] Split struct request ->flags into two parts
Right now ->flags is a bit of a mess: some are request types, and
others are just modifiers. Clean this up by splitting it into
->cmd_type and ->cmd_flags. This allows introduction of generic
Linux block message types, useful for sending generic Linux commands
to block devices.
Signed-off-by: Jens Axboe <axboe@suse.de>
/drivers/s390/block/dasd_eckd.c
|
| 8e79a441a4d8a34d64efe93add49b3eefca5cd1c |
|
24-Aug-2006 |
Horst Hummel <horst.hummel@de.ibm.com> |
[S390] dasd PAV enabling.
The subsystem check in the PAV code is incorrect, it enables PAV
per device instead of per subsystem.
Signed-off-by: Horst Hummel <horst.hummel@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| d0710c7c9eea2145a0614f39dbe9dc8cb4ae14da |
|
10-Aug-2006 |
Horst Hummel <horst.hummel@de.ibm.com> |
[S390] dasd calls kzalloc while holding a spinlock.
The dasd function dasd_set_uid calls kzalloc while holding the
dasd_devmap_lock. Rearrange the code to do the memory allocation
outside the lock.
Signed-off-by: Horst Hummel <horst.hummel@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| d2c993d845781d160a7ef759a3e65c6892c4a270 |
|
12-Jul-2006 |
Heiko Carstens <heiko.carstens@de.ibm.com> |
[S390] Fix sparse warnings.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| 6ab3d5624e172c553004ecc862bfeac16d9d68b7 |
|
30-Jun-2006 |
Jörn Engel <joern@wohnheim.fh-wedel.de> |
Remove obsolete #include <linux/config.h>
Signed-off-by: Jörn Engel <joern@wohnheim.fh-wedel.de>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
/drivers/s390/block/dasd_eckd.c
|
| 405455734e1cdec09c37233216f9240cb1a058e5 |
|
29-Jun-2006 |
Horst Hummel <horst.hummel@de.ibm.com> |
[S390] add PAV support to the dasd driver.
Add support for parallel-access-volumes to the dasd driver. This
allows concurrent access to dasd devices with multiple channel
programs.
Signed-off-by: Horst Hummel <horst.hummel@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| 138c014dcba74211dc4e835658f34a787c40cf17 |
|
29-Jun-2006 |
Horst Hummel <horst.hummel@de.ibm.com> |
[S390] dasd whitespace and other cosmetics.
Dasd code cleanup: 1) remove white space, 2) remove the emacs override
sections, and 3) use kzalloc instead of kmalloc.
Signed-off-by: Horst Hummel <horst.hummel@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| 445b5b499e0ca1584ee3aa8af298c9ef8c84d711 |
|
29-Jun-2006 |
Horst Hummel <horst.hummel@de.ibm.com> |
[S390] dasd_eckd_dump_sense bug.
The ccw dump function dasd_eckd_dump_ccw_range can crash because
it does not take care about the IDAL flag in the ccw.
Check for IDALs flag set in CCW and follow the indirect list to
print the data that is refered by the ccw.
Signed-off-by: Horst Hummel <horst.hummel@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
/drivers/s390/block/dasd_eckd.c
|
| 3d052595423b4432f4d599c1aeb1949ac0da7314 |
|
28-Apr-2006 |
Horst Hummel <horst.hummel@de.ibm.com> |
[PATCH] s390: dasd device identifiers
Generate new sysfs-attribute 'uid' that contains an device specific unique
identifier. This can be used to identity multiple ALIASES of the same
physical device (PAV). In addition the sysfs-attributes 'vendor' (containing
the manufacturer of the device) and 'alias' (identify alias or base device) is
added. This is first part of PAV support in LPAR (also valid on zVM).
Signed-off-by: Horst Hummel <horst.hummel@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
/drivers/s390/block/dasd_eckd.c
|
| 1107ccfbdef280fedc677af3bdbc405611ba554a |
|
24-Mar-2006 |
Christoph Hellwig <hch@lst.de> |
[PATCH] s390: use normal switch statement for ioctls in dasd_ioctlc
Add an ->ioctl method to the dasd_discipline structure. This allows to apply
the same kind of cleanups the last patch applied to dasd_ioctl.c to
dasd_eckd.c (the only dasd discipline with special ioctls) aswell.
Again lots of code removed. During auditing the ioctls I found two fishy
return value propagations from copy_{from,to}_user, maintainers please check
those, I've marked them with XXX comments.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
/drivers/s390/block/dasd_eckd.c
|
| e018ba1fceee5bd306e31f6e3a60934d5f143ac5 |
|
01-Feb-2006 |
Heiko Carstens <heiko.carstens@de.ibm.com> |
[PATCH] s390: Remove CVS generated information
- Remove all CVS generated information like e.g. revision IDs from
drivers/s390 and include/asm-s390 (none present in arch/s390).
- Add newline at end of arch/s390/lib/Makefile to avoid diff message.
Acked-by: Andreas Herrmann <aherrman@de.ibm.com>
Acked-by: Frank Pavlic <pavlic@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
/drivers/s390/block/dasd_eckd.c
|
| 347a8dc3b815f0c0fa62a1df075184ffe4cbdcf1 |
|
06-Jan-2006 |
Martin Schwidefsky <schwidefsky@de.ibm.com> |
[PATCH] s390: cleanup Kconfig
Sanitize some s390 Kconfig options. We have ARCH_S390, ARCH_S390X,
ARCH_S390_31, 64BIT, S390_SUPPORT and COMPAT. Replace these 6 options by
S390, 64BIT and COMPAT.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
/drivers/s390/block/dasd_eckd.c
|
| 1c01b8a5963aec60488c1c97d67cffd8b5275e3f |
|
06-Jan-2006 |
Horst Hummel <horst.hummel@de.ibm.com> |
[PATCH] s390: dasd failfast support
To properly support multipath-failover handling, the linux block layer has
introduced a special request flag, 'REQ_FAILFAST'. This flag is now used to
return requests immediately in case the device is not operational.
Signed-off-by: Horst Hummel <horst.hummel@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
/drivers/s390/block/dasd_eckd.c
|
| ec5883abebb2e249ea8d318cb58fb4b2c269cf10 |
|
01-May-2005 |
Horst Hummel <horst.hummel@de.ibm.com> |
[PATCH] s390: don't pad cdl blocks for write requests
The first blocks on a cdl formatted dasd device are smaller than the blocksize
of the device. Read requests are padded with a 'e5' pattern. Write requests
should not pad the (user) buffer with 'e5' because a write request is not
allowed to modify the buffer.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
/drivers/s390/block/dasd_eckd.c
|
| 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 |
|
17-Apr-2005 |
Linus Torvalds <torvalds@ppc970.osdl.org> |
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
/drivers/s390/block/dasd_eckd.c
|