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* [SCSI] scsi_dh_rdac : Adding MODULE VERSION for rdac device handlerMoger, Babu2011-02-12
| | | | | | | | Adding MODULE_VERSION for scsi_dh_rdac. This will be helpful sometimes to get the code level without looking at the code. Signed-off-by: Babu Moger <babu.moger@lsi.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] scsi_dh: cosmetic change to sizeof()Hillf Danton2011-02-12
| | | | | | | | | instead of doing sizeof(struct X) it's better to do sizeof(*v) where v is the variable pointing to struct X. Signed-off-by: Hillf Danton <dhillf@gmail.com> Signed-off-by: Babu Moger <babu.moger@lsi.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] scsi_dh_rdac: fix for lun_table update for rdac device handlerMoger, Babu2011-02-12
| | | | | | | | | | | | | | | | | During one of our testing, we noticed that mode select command sent from the host did not have the lun_table updated. Problem is root caused to the way lun table is updated. Lun table update was done after the call to blk_rq_map_kern is made. This was causing problem because kernel uses bounce buffer(bio_copy_kern) if the address is not aligned. The command buffer updated after the call(blk_rq_map_kern) was not going on the wire. Moved the code to update the lun_table before the call to fix the problem. Signed-off-by: Babu Moger <babu.moger@lsi.com> Signed-off-by: Somasundaram Krishnasamy <Somasundaram.Krishnasamy@lsi.com> Signed-off-by: Yanling Qi <Yanling.Qi@lsi.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] scsi_dh_hp_sw: fix deadlock in start_stop_endioMike Snitzer2011-02-12
| | | | | | | | | The use of blk_execute_rq_nowait() implies __blk_put_request() is needed in start_stop_endio() rather than blk_put_request() -- blk_finish_request() is called with queue lock already held. Signed-off-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] scsi_dh: Use scsi_devinfo functions to do matching of device_handler ↵Peter Jones2011-01-24
| | | | | | | | | | | | tables. Previously we were using strncmp in order to avoid having to include whitespace in the devlist, but this means "HSV1000" matches a device list entry that says "HSV100", which is wrong. This patch changes scsi_dh.c to use scsi_devinfo's matching functions instead, since they handle these cases correctly. Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] scsi_dh_alua: add scalable ONTAP lun to dev listMike Snitzer2011-01-24
| | | | | | | | | | | | | | | Currently NetApp's VID/PID details in the INQUIRY response shows up as 'NETAPP' and 'LUN'. With upcoming scalable SAN ONTAP version on NetApp controllers, the PID entry alone is being modified to 'LUN C-Mode' (to distinguish current ONTAP LUNs from scalable ONTAP LUNs). 'LUN' would still suffice for matching 'LUN C-Mode' but best to explicitly add these new NetApp LUNs to the device list. Reported-by: Martin George <marting@netapp.com> Acked-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] scsi_dh_alua: Add Promise VTrak to dev listIlgu Hong2011-01-24
| | | | | | | | | Adds Promise VTrak devices to the ALUA device handler. Signed-off-by: Ilgu Hong <ilgu.hong@promise.com> Signed-off-by: Joseph Gruher <joseph.r.gruher@intel.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] scsi_dh_alua: fix stpg_endio group state reportingJoseph Gruher2011-01-24
| | | | | | | | | | | Initialize stpg_endio() 'err' to SCSI_DH_OK and only change it to SCSI_DH_IO accordingly. This allows the switching of target group state to be properly reported when no error has occurred. Signed-off-by: Joseph Gruher <joseph.r.gruher@intel.com> Signed-off-by: Ilgu Hong <ilgu.hong@promise.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] scsi_dh_alua: fix deadlock in stpg_endioJoseph Gruher2011-01-24
| | | | | | | | | | | | The use of blk_execute_rq_nowait() implies __blk_put_request() is needed in stpg_endio() rather than blk_put_request() -- blk_finish_request() is called with queue lock already held. Signed-off-by: Joseph Gruher <joseph.r.gruher@intel.com> Signed-off-by: Ilgu Hong <ilgu.hong@promise.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com> Cc: stable@kernel.org Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] scsi_dh_alua: fix submit_stpg returnJoseph Gruher2011-01-24
| | | | | | | | | | | | | | | | submit_stpg() will always return failure so alua_activate() will report failure via dm-multipath callback function. Even though the stpg fired successfuly dm-multipath does not know and always fails to change the valid path. By returning SCSI_DH_OK we're now skipping alua_activate()'s call to activate_complete 'fn'. But this is fine because stpg_endio() will call it via h->callback_fn(). Signed-off-by: Joseph Gruher <joseph.r.gruher@intel.com> Signed-off-by: Ilgu Hong <ilgu.hong@promise.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] scsi_dh: propagate SCSI device deletionMenny Hamburger2010-12-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently, when scsi_dh_activate() returns with an error (e.g. SCSI_DH_NOSYS) the activate_complete callback is not called and the error is not propagated to DM mpath. When a SCSI device attached to a device handler is deleted, userland processes currently performing I/O on the device will have their I/O hang forever. - Set SCSI_DH_NOSYS error when the handler is in the process of being deleted (e.g. the SCSI device is in a SDEV_CANCEL or SDEV_DEL state). - Set SCSI_DH_DEV_OFFLINED error when device is in SDEV_OFFLINE state. - Call the activate_complete callback function directly from scsi_dh_activate if an error has been set (when either the scsi_dh internal data has already been deleted or is in the process of being deleted). The patch was tested in an iSCSI environment, RDAC H/W handler and multipath. In the following reproduction process, dd will I/O hang forever and the only way to release it will be to reboot the machine: 1) Perform I/O on a multipath device: dd if=/dev/dm-0 of=/dev/zero bs=8k count=1000000 & 2) Delete all slave SCSI devices contained in the mpath device: I) In an iSCSI environment, the easiest way to do this is by stopping iSCSI: /etc/init.d/iscsi stop II) Another way to delete the devices is by applying the following bash scriptlet: dm_devs=$(ls /sys/block/ | grep dm- | xargs) for dm_dev in $dm_devs; do devices=$(ls /sys/block/$dm_dev/slaves) for device in $devices; do echo 1 > /sys/block/$device/device/delete done done NOTE: when DM mpath's fail_path uses blk_abort_queue this scsi_dh change isn't strictly required. However, DM mpath's call to blk_abort_queue will soon be reverted because it has proven to be unsafe due to a race (between blk_abort_queue and scsi_request_fn) that can lead to list corruption. Therefore we cannot rely on blk_abort_queue via fail_path, but even if we could this scsi_dh change is still preferrable. Signed-off-by: Menny Hamburger <Menny_Hamburger@Dell.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com> Reviewed-by: Babu Moger <babu.moger@lsi.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] scsi_dh_rdac: Add two new SUN devices to rdac_dev_listChauhan, Vijay2010-10-25
| | | | | | Signed-off-by: Vijay Chauhan <vijay.chauhan@lsi.com> Acked-by: Chandra Seetharaman <sekharan@us.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] scsi_dh_alua: Handle all states correctlyHannes Reinecke2010-10-07
| | | | | | | | | | | | For ALUA we should be handling all states, independent of whether the mode is explicit or implicit. For 'Transitioning' we should retry for a certain amount of time; after that we're setting the port to 'Standby' and return SCSI_DH_RETRY to signal upper layers a retry is in order here. Signed-off-by: Hannes Reinecke <hare@suse.de> Acked-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] scsi_dh_rdac: Add Dell MD36xxi controller into RDAC device listYanqing_Liu@Dell.com2010-07-28
| | | | | | | | This patch is to add next generation of Dell iSCSI PowerVault controller MD36xxi into RDAC device list. Signed-off-by: Yanqing Liu <Yanqing_Liu@Dell.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] scsi_dh_emc: request flag cleanupMike Christie2010-04-11
| | | | | | | | | blk_get_request sets the cmd_flags, so we should not and do not need to set them. If we did set them to a different value then it can cause a oops in the elevator code. Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* include cleanup: Update gfp.h and slab.h includes to prepare for breaking ↵Tejun Heo2010-03-30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
* [SCSI] scsi_dh_emc: fix mode select request setupHannes Reinecke2010-03-03
| | | | | | | | | | | | | | This patch fixes the request setup code for mode selects. I got the fixes from Hannes Reinecke while trying to hunt down some problems and merged it into one patch. I am sending it because Hannes is busy with other things. The patch fixes: - setting of the length for mode selects. - setting of the data direction for mode select 10. Signed-off-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] scsi_dh_alua: Add IBM Power Virtual SCSI ALUA device to dev listBrian King2010-02-19
| | | | | | | Adds IBM Power Virtual SCSI ALUA devices to the ALUA device handler. Signed-off-by: Brian King <brking@linux.vnet.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] scsi_dh_alua: add netapp to dev listMike Christie2010-02-19
| | | | | | | | Newer Netapp target software supports ALUA, so this patch adds them to the scsi_dev_alua dev list. Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] scsi_dh_rdac: Add two new IBM devices to rdac_dev_listMoger, Babu2009-12-10
| | | | | | | This patch adds two new IBM storage devices which can use rdac device handlers. Signed-off-by: Babu Moger <babu.moger@lsi.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] scsi_dh: create sysfs file, dh_state for all SCSI disk devicesChandra Seetharaman2009-12-04
| | | | | | | | | Create the sysfs file, dh_state even if the new SCSI device is not in the any of the device handler's internal lists. Signed-Off-by: Chandra Seetharaman <sekharan@us.ibm.com> Acked-by: Hannes Reinecke <hare@suse.de> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] scsi_dh: Make alua hardware handler's activate() asyncChandra Seetharaman2009-12-04
| | | | | | | Make the activate function asynchronous by using blk_execute_rq_nowait() Signed-off-by: Chandra Seetharaman <sekharan@us.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] scsi_dh: Make hp hardware handler's activate() asyncChandra Seetharaman2009-12-04
| | | | | | | Make the activate function asynchronous by using blk_execute_rq_nowait() Signed-off-by: Chandra Seetharaman <sekharan@us.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] scsi_dh: Make rdac hardware handler's activate() asyncChandra Seetharaman2009-12-04
| | | | | | | | | | | | | | | | | | | Batch up MODE_SELECT in rdac device handler. LSI RDAC storage has the capability of handling mode selects for multiple luns in a same command. Make use of that ability to send as few MODE SELECTs as possible to the storage controller as possible. This patch creates a work queue and queues up activate requests when a MODE SELECT is sent down the wire. When that MODE SELECT completes, it compiles queued up activate requests for multiple luns into a single MODE SELECT. This reduces the time to do failover/failback of large number of LUNS. Signed-off-by: Babu Moger <babu.moger@lsi.com> Signed-off-by: Chandra Seetharaman <sekharan@us.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] scsi_dh: Change the scsidh_activate interface to be asynchronousChandra Seetharaman2009-12-04
| | | | | | | | | Make scsi_dh_activate() function asynchronous, by taking in two additional parameters, one is the callback function and the other is the data to call the callback function with. Signed-off-by: Chandra Seetharaman <sekharan@us.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] scsi_dh_rdac: Fix for returning correct mode select cmd return infoMoger, Babu2009-10-02
| | | | | | | | | | The function mode_select_handle_sense returns SCSI_DH_OK even when there is a sense code which is incorrect. Removing it so that it returns SCSI_DH_IO when there is sense that is not handled by this function. Signed-off-by: Babu Moger <babu.moger@lsi.com> Reviewed-by: Vijay Chauhan <vijay.chauhan@lsi.com> Reviewed-by: Bob Stankey <Robert.stankey@lsi.com> Reviewed-by: Chandra Seetharaman <sekharan@us.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] scsi_dh_rdac: changes for rdac debug loggingMoger, Babu2009-09-12
| | | | | | | | | | | | | | | Patch to add debugging stuff for rdac device handler. - Added a bit mask "module parameter" rdac_logging with 2 bits for each type of logging. - currently defined only two types of logging(failover and sense logging). Can be enhanced later if required. - By default only failover logging is enabled which is equivalent of current logging. Signed-off-by: Babu Moger <babu.moger@lsi.com> Reviewed-by: Vijay Chauhan <vijay.chauhan@lsi.com> Reviewed-by: Bob Stankey <Robert.stankey@lsi.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] scsi_dh_rdac: changes to collect the rdac debug information during ↵Moger, Babu2009-09-12
| | | | | | | | | | | | | the initialization Adding the code to read the debug information during initialization. This patch collects the information about storage and controllers during rdac_activate. Signed-off-by: Babu Moger <babu.moger@lsi.com> Reviewed-by: Vijay Chauhan <vijay.chauhan@lsi.com> Reviewed-by: Bob Stankey <Robert.stankey@lsi.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] scsi_dh_rdac: move the init code from rdac_activate to rdac_bus_attachMoger, Babu2009-09-12
| | | | | | | | | | | Moving the initialization code from rdac_activate to rdac_bus_attach which is more efficient. We don't have to collect all the information during every activate. Signed-off-by: Babu Moger <babu.moger@lsi.com> Reviewed-by: Vijay Chauhan <vijay.chauhan@lsi.com> Reviewed-by: Bob Stankey <Robert.stankey@lsi.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] scsi_dh_rdac: Add support for Sun StorageTek ST2500, ST2510 and ST2530Charlie Brady2009-09-12
| | | | | | | | | | | | | These storage arrays can use RDAC when configured with 'linux' as the initiator. http://www.sun.com/storage/disk_systems/workgroup/2500/ http://www.sun.com/storage/disk_systems/workgroup/2510/ http://www.sun.com/storage/disk_systems/workgroup/2530/ Signed-off-by: Charlie Brady <charlieb@budge.apana.org.au> Reviewed-by: Chandra Seetharaman <sekharan@us.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] scsi_dh_rdac: add support for next generation of Dell PV arrayYanqing_Liu@Dell.com2009-09-05
| | | | | | | | | This patch is to add DM support for next generation of Dell PowerVault storage array. Signed-off-by: Yanqing Liu <Yanqing_Liu@Dell.com> Acked-by: Chandra Seetharaman <sekharan@us.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] scsi_dh: add two SUN devices to the list of devices supported by defaultChandra Seetharaman2009-08-22
| | | | | | Reported-by: Rice Brown <rick.brown@oit.gatech.edu> Signed-Off-by: Chandra Seetharaman <sekharan@us.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] scsi_dh: Provide set_params interface in emc device handlerChandra Seetharaman2009-08-22
| | | | | | | | | | | | | | | Handle the parameters provided by user thru multipath. This handler expects only 2 parameters and their value can either be 0 or 1. This code originates from the old dm-emc.c file. Appropriate changes have been made to make it work in the new design. Reported-by: Eddie Williams <Eddie.Williams@steeleye.com> Signed-off-by: Chandra Seetharaman <sekharan@us.ibm.com> Tested-by: Eddie Williams <Eddie.Williams@steeleye.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] scsi_dh: add the interface scsi_dh_set_params()Chandra Seetharaman2009-08-22
| | | | | | | | | | | | | | | | | | | | | When we moved the device handler functionality from dm layer to SCSI layer we dropped the parameter functionality. This path adds an interface to scsi dh layer to set device handler parameters. Basically, multipath layer need to create a string with all the parameters and call scsi_dh_set_params() after it called scsi_dh_attach() on a device. If a device handler provides such an interface it will handle the parameters as it expects them. Reported-by: Eddie Williams <Eddie.Williams@steeleye.com> Signed-off-by: Chandra Seetharaman <sekharan@us.ibm.com> Tested-by: Eddie Williams <Eddie.Williams@steeleye.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] ALUA: send STPG if explicit and implicit is supportedMike Christie2009-08-22
| | | | | | | | | | | | | | alua_activate only sends a STPG if only explicit is suppored. As a result, for EMC targets that support both we end up doing a implicit failover when X commands are finally sent to the other SP. This patch does a AND on the h->tpgs, so we do a explicit failover right away. Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] scsi_dh: Reference count scsi_dh_attachChandra Seetharaman2009-08-22
| | | | | | | | | | | | | | Problem reported: http://marc.info/?l=dm-devel&m=124585978305866&w=2 scsi_dh does not do a refernce count for attach/detach, and this affects the way it is supposed to work with multipath when a device is not in the dev_list of the hardware handler. This patch adds a reference count that counts each attach. Signed-off-by: Chandra Seetharaman <sekharan@us.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] scsi_dh_rdac: Retry for NOT_READY(02/04/01) in rdac device handlerChauhan, Vijay2009-05-20
| | | | | | | | | | | During device discovery read capacity fails with 0x020401 and sets the device size to 0. As a reason any I/O submitted to this path gets killed at sd_prep_fn with BLKPREP_KILL. This patch is to retry for 0x020401. NEED_RETRY in scsi_decide_disposition does not give sufficient time for the device to become ready. Signed-off-by: Vijay Chauhan <vijay.chauhan@lsi.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
* [SCSI] scsi_dh_rdac: Retry for NOT_READY check conditionChauhan, Vijay2009-03-17
| | | | | | | | This patch adds retry for NOT_READY check condition - Quiesce in progress (02/A1/02) Signed-off-by: Vijay Chauhan<vijay.chauhan@lsi.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
* [SCSI] scsi_dh_rdac: Retry mode select for NO_SENSE, ABORTED_COMMAND, ↵Chauhan, Vijay2009-03-12
| | | | | | | | | | | | | UNIT_ATTENTION, NOT_READY(02/04/01) This patch is to add retry for mode select if mode select command is returned with sense NO_SENSE, UNIT_ATTENTION, ABORTED_COMMAND, NOT_READY(02/04/01). This patch reorganise the sense keys from if-else to switch-case format for better maintainability. Signed-off-by: Vijay Chauhan <vijay.chauhan@lsi.com> Acked-by: Chandra Seetharaman <sekharan@us.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
* [SCSI] scsi_dh_rdac: Retry for Quiescence in Progress in rdac device handlerChauhan, Vijay2009-03-12
| | | | | | | | | | | During device discovery read capacity fails with 0x068b02 and sets the device size to 0. As a reason any I/O submitted to this path gets killed at sd_prep_fn with BLKPREP_KILL. This patch is to retry for 0x068b02 Signed-off-by: Vijay Chauhan <vijay.chauhan@lsi.com> Acked-by: Chandra Seetharaman <sekharan@us.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
* [SCSI] scsi dh alua: handle report luns data changed in check sense calloutIlgu Hong2009-03-12
| | | | | | | | | | When we switch controllers the Intel Multi-Flex reports REPORTED_LUNS_DATA_HAS_CHANGED. This patch just has us retry the command. Signed-off-by: Ilgu Hong <ilgu.hong@promise.com> Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
* [SCSI] scsi dh alua: add intel Multi-Flex deviceIlgu Hong2009-03-12
| | | | | | | | | This adds the Intel Multi-Flex device to scsi_dh_alua's scsi_dh_devlist, so the module attaches to these devs. Signed-off-by: Ilgu Hong <ilgu.hong@promise.com> Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
* [SCSI] scsi dh alua: fix group id maskingIlgu Hong2009-03-12
| | | | | | | | | The buf[i] is a byte but we are only asking 4 bits off the group_id. This patch has us take off a byte. Signed-off-by: Ilgu Hong <ilgu.hong@promise.com> Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
* [SCSI] scsi_dh_rdac: Add LSI vendor and product ids in rdac device listBabu Moger2008-12-29
| | | | | | [jejb: fixed whitespace damage] Signed-off-by: Babu Moger <Babu.Moger@lsi.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
* [SCSI] scsi_dh: Retry mode select in rdac device handlerChandra Seetharaman2008-12-29
| | | | | | | | | When the mode select sent to the controller fails with the retryable error, it is better to retry the mode_select from the hardware handler itself, instead of propagating the failure to dm-multipath. Signed-off-by: Chandra Seetharaman <sekharan@us.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
* [SCSI] scsi_dh: Make sure the state of a path is set properly when ↵Chandra Seetharaman2008-12-29
| | | | | | | | | | | controller is swapped from passive to active When the controller ownership is changed (from passive to active), check_ownership() doesn't set the state of the device to ACTIVE. Signed-off-by: Chandra Seetharaman <sekharan@us.ibm.com> Reported-by: "Moger, Babu" <Babu.Moger@lsi.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
* Commands needing to be retried require a complete re-initialization.Alan D. Brunelle2008-12-12
| | | | | | | | | | | | | The test-unit-ready portion of this patch was causing boots to fail on my test machine (as in http://lkml.org/lkml/2008/12/5/161). With this patch in place, the system is booting reliably. Mike Anderson found the same problem in the hp_hw_start_stop code, and I applied the same solution in cdrom_read_cdda_bpc. Signed-off-by: Alan D. Brunelle <alan.brunelle@hp.com> Cc: Mike Anderson <andmike@linux.vnet.ibm.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* [SCSI] scsi_dh: Initialize path state to be passive when path is not ownedChandra Seetharaman2008-10-23
| | | | | | | | | | | Set the path state to be passive when we learn that the controller does not own the path to the LUN. This will avoid sending even a single i/o thru the passive path at the probe time. Signed-off-by: Chandra Seetharaman <sekharan@us.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
* [SCSI] scsi_dh_alua: remove REQ_NOMERGEMike Christie2008-10-13
| | | | | | | | | We do not need to set REQ_NOMERGE because when the module calls blk_execute_rq -> blk_execute_rq_nowait, blk_execute_rq_nowait sets it for us. This brings all the modules in sync for those bits. Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
* [SCSI] block: separate failfast into multiple bits.Mike Christie2008-10-13
| | | | | | | | | | | | | | | | | | | | | | 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>
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