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* [SCSI] remove scsi_req_map_sgFUJITA Tomonori2009-03-121-6/+0
| | | | | | | | | | | | No one uses scsi_execute_async with data transfer now. We can remove scsi_req_map_sg. Only scsi_eh_lock_door uses scsi_execute_async. scsi_eh_lock_door doesn't handle sense and the callback. So we can remove scsi_io_context too. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
* [SCSI] Check for deleted device in scsi_device_online()Hannes Reinecke2009-03-121-1/+2
| | | | | | | | scsi_device_online() is not just a negation of SDEV_OFFLINE, also devices in state SDEV_DEL are actually offline. Signed-off-by: Hannes Reinecke <hare@suse.de> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
* [SCSI] Add VPD helperMatthew Wilcox2009-03-121-0/+1
| | | | | | | | Based on prior work by Martin Petersen and James Bottomley, this patch adds a generic helper for retrieving VPD pages from SCSI devices. Signed-off-by: Matthew Wilcox <willy@linux.intel.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
* [SCSI] add residual argument to scsi_execute and scsi_execute_reqFUJITA Tomonori2008-12-291-2/+3
| | | | | | | | | scsi_execute() and scsi_execute_req() discard the residual length information. Some callers need it. This adds residual argument (optional) to scsi_execute and scsi_execute_req. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
* [SCSI] remove timeout from struct scsi_deviceJames Bottomley2008-12-291-2/+0
| | | | | | | by removing the unused timeout parameter we ensure a compile failure if anyone is accidentally still using it rather than the block timeout. Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
* [SCSI] Add helper code so transport classes/driver can control queueing (v3)Mike Christie2008-10-131-0/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | SCSI-ml manages the queueing limits for the device and host, but does not do so at the target level. However something something similar can come in userful when a driver is transitioning a transport object to the the blocked state, becuase at that time we do not want to queue io and we do not want the queuecommand to be called again. The patch adds code similar to the exisiting SCSI_ML_*BUSY handlers. You can now return SCSI_MLQUEUE_TARGET_BUSY when we hit a transport level queueing issue like the hw cannot allocate some resource at the iscsi session/connection level, or the target has temporarily closed or shrunk the queueing window, or if we are transitioning to the blocked state. bnx2i, when they rework their firmware according to netdev developers requests, will also need to be able to limit queueing at this level. bnx2i will hook into libiscsi, but will allocate a scsi host per netdevice/hba, so unlike pure software iscsi/iser which is allocating a host per session, it cannot set the scsi_host->can_queue and return SCSI_MLQUEUE_HOST_BUSY to reflect queueing limits on the transport. The iscsi class/driver can also set a scsi_target->can_queue value which reflects the max commands the driver/class can support. For iscsi this reflects the number of commands we can support for each session due to session/connection hw limits, driver limits, and to also reflect the session/targets's queueing window. Changes: v1 - initial patch. v2 - Fix scsi_run_queue handling of multiple blocked targets. Previously we would break from the main loop if a device was added back on the starved list. We now run over the list and check if any target is blocked. v3 - Rediff for scsi-misc. Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
* [SCSI] Update the SCSI state model to allow blocking in the created stateJames Bottomley2008-10-031-5/+9
| | | | | | | | | | | | | | Brian King <brking@linux.vnet.ibm.com> reported that fibre channel devices can oops during scanning if their ports block (because the device goes from CREATED -> BLOCK -> RUNNING rather than CREATED -> BLOCK -> CREATED). Fix this by adding a new state: CREATED_BLOCK which can only transition back to CREATED and disallow the CREATED -> BLOCK transition. Now both the created and blocked states that the mid-layer recognises can include CREATED_BLOCK. Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
* [SCSI] add inline functions for recognising created and blocked statesJames Bottomley2008-10-031-0/+11
| | | | | | | The created and blocked states are very shortly going to correspond to mixed sdev_state states. Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
* [SCSI] sd: fix USB devices incorrectly reporting DIF supportHugh Dickins2008-08-061-1/+2
| | | | | | | | | | | Some USB devices set the protect bit in the INQUIRY data which currently causes the DIF code in sd to assume (incorrectly) that they support READ_CAPACITY(16). Fix this (only for the time being) by making sure we only believe the protect bit in the inquiry data if the device claims conformance to SCSI-3 or above. Acked-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
* Re-introduce "[SCSI] extend the last_sector_bug flag to cover more sectors"Linus Torvalds2008-08-061-1/+2
| | | | | | | | | | | | | | | | | | | This re-introduces commit 2b142900784c6e38c8d39fa57d5f95ef08e735d8, which was reverted due to the regression it caused by commit fca082c9f1e11ec07efa8d2f9f13688521253f36. That regression was not root-caused by the original commit, it was just uncovered by it, and the real fix was done by Alan Stern in commit 580da34847488b404218d1d7f53b156f245f5555 ("Fix USB storage hang on command abort"). We can thus re-introduce the change that was confirmed by Alan Jenkins to be still required by his odd card reader. Cc: Alan Jenkins <alan-jenkins@tuffmail.co.uk> Cc: Alan Stern <stern@rowland.harvard.edu> Cc: James Bottomley <James.Bottomley@HansenPartnership.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Revert "[SCSI] extend the last_sector_bug flag to cover more sectors"Linus Torvalds2008-08-051-2/+1
| | | | | | | | | | | | This reverts commit 2b142900784c6e38c8d39fa57d5f95ef08e735d8, since it seems to break some other USB storage devices (at least a JMicron USB to ATA bridge). As such, while it apparently fixes some cardreaders, it would need to be made conditional on the exact reader it fixes in order to avoid causing regressions. Cc: Alan Jenkins <alan-jenkins@tuffmail.co.uk> Cc: James Bottomley <James.Bottomley@HansenPartnership.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* [SCSI] extend the last_sector_bug flag to cover more sectorsAlan Jenkins2008-07-271-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The last_sector_bug flag was added to work around a bug in certain usb cardreaders, where they would crash if a multiple sector read included the last sector. The original implementation avoids this by e.g. splitting an 8 sector read which includes the last sector into a 7 sector read, and a single sector read for the last sector. The flag is enabled for all USB devices. This revealed a second bug in other usb cardreaders, which crash when they get a multiple sector read which stops 1 sector short of the last sector. Affected hardware includes the Kingston "MobileLite" external USB cardreader and the internal USB cardreader on the Asus EeePC. Extend the last_sector_bug workaround to ensure that any access which touches the last 8 hardware sectors of the device is a single sector long. Requests are shrunk as necessary to meet this constraint. This gives us a safety margin against potential unknown or future bugs affecting multi-sector access to the end of the device. The two known bugs only affect the last 2 sectors. However, they suggest that these devices are prone to fencepost errors and that multi-sector access to the end of the device is not well tested. Popular OS's use multi-sector accesses, but they rarely read the last few sectors. Linux (with udev & vol_id) automatically reads sectors from the end of the device on insertion. It is assumed that single sector accesses are more thoroughly tested during development. Signed-off-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk> Tested-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
* [SCSI] Support devices with protection informationMartin K. Petersen2008-07-261-0/+5
| | | | | | | | | | | | | | | | | Implement support for DMA of protection information for devices that are data integrity capable. - Add support for mapping an extra scatter-gather list containing the protection information. - Allocate protection scsi_data_buffer if host is DIX (integrity DMA) capable. - Accessor function for checking whether a device has protection enabled. Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
* [SCSI] scsi_dh: Implement common device table handlingHannes Reinecke2008-07-261-1/+8
| | | | | | | | | | | | | Instead of having each and every driver implement its own device table scanning code we should rather implement a common routine and scan the device tables there. This allows us also to implement a general notifier chain callback for all device handler instead for one per handler. [sekharan: Fix rejections caused by conflicting bug fix] Signed-off-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Chandra Seetharaman <sekharan@us.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6Linus Torvalds2008-07-161-0/+22
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6: (102 commits) [SCSI] scsi_dh: fix kconfig related build errors [SCSI] sym53c8xx: Fix bogus sym_que_entry re-implementation of container_of [SCSI] scsi_cmnd.h: remove double inclusion of linux/blkdev.h [SCSI] make struct scsi_{host,target}_type static [SCSI] fix locking in host use of blk_plug_device() [SCSI] zfcp: Cleanup external header file [SCSI] zfcp: Cleanup code in zfcp_erp.c [SCSI] zfcp: zfcp_fsf cleanup. [SCSI] zfcp: consolidate sysfs things into one file. [SCSI] zfcp: Cleanup of code in zfcp_aux.c [SCSI] zfcp: Cleanup of code in zfcp_scsi.c [SCSI] zfcp: Move status accessors from zfcp to SCSI include file. [SCSI] zfcp: Small QDIO cleanups [SCSI] zfcp: Adapter reopen for large number of unsolicited status [SCSI] zfcp: Fix error checking for ELS ADISC requests [SCSI] zfcp: wait until adapter is finished with ERP during auto-port [SCSI] ibmvfc: IBM Power Virtual Fibre Channel Adapter Client Driver [SCSI] sg: Add target reset support [SCSI] lib: Add support for the T10 (SCSI) Data Integrity Field CRC [SCSI] sd: Move scsi_disk() accessor function to sd.h ...
| * [SCSI] scsi_dh: add infrastructure for SCSI Device HandlersChandra Seetharaman2008-06-051-0/+22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Some of the storage devices (that can be accessed through multiple paths), do need some special handling for 1. Activating the passive path of the storage access. 2. Decode and handle the special sense codes returned by the devices. 3. Handle the I/Os being sent to the passive path, especially during the device probe time. when accessed through multiple paths. As of today this special device handling is done at the dm-multipath layer using dm-handlers. That works well for (1); for (2) to be handled at dm layer, scsi sense information need to be exported from SCSI to dm-layer, which is not very attractive; (3) cannot be done at all at the dm layer. Device handler has been moved to SCSI mainly to handle (2) and (3) properly. Signed-off-by: Chandra Seetharaman <sekharan@us.ibm.com> Signed-off-by: Mike Anderson <andmike@linux.vnet.ibm.com> Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
* | scsi: sd: optionally set power condition in START STOP UNITStefan Richter2008-07-141-0/+1
|/ | | | | | | | | | | | | | | | | | | | | | | | | | Adds a new scsi_device flag, start_stop_pwr_cond: If enabled, the sd driver will not send plain START STOP UNIT commands but ones with the power condition field set to 3 (standby) or 1 (active) respectively. Some FireWire disk firmwares do not stop the motor if power condition is zero. Or worse, they become unresponsive after a START STOP UNIT with power condition = 0 and start = 0. http://lkml.org/lkml/2008/4/29/704 This patch only adds the necessary code to sd_mod but doesn't activate it. Follow-up patches to the FireWire drivers will add detection of affected devices and enable the code for them. I did not add power condition values to scsi_error.c::scsi_eh_try_stu() for now. The three firmwares which suffer from above mentioned problems do not need START STOP UNIT in the error handler, and they are not adversely affected by START STOP UNIT with power condition = 0 and start = 1 (like scsi_eh_try_stu() sends it if scsi_device.allow_restart is enabled). Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Tested-by: Tino Keitel <tino.keitel@gmx.de>
* [SCSI] rework scsi_target allocationJames Bottomley2008-04-221-1/+2
| | | | | | | | | | | | | | | | The current target allocation code registeres each possible target with sysfs; it will be deleted again if no useable LUN on this target was found. This results in a string of 'target add/target remove' uevents. Based on a patch by Hannes Reinecke <hare@suse.de> this patch reworks the target allocation code so that only uevents for existing targets are sent. The sysfs registration is split off from the existing scsi_target_alloc() into a in a new scsi_add_target() function, which should be called whenever an existing target is found. Only then a uevent is sent, so we'll be generating events for existing targets only. Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
* SCSI: convert struct class_device to struct deviceTony Jones2008-04-201-5/+5
| | | | | | | | | | | | | It's big, but there doesn't seem to be a way to split it up smaller... Signed-off-by: Tony Jones <tonyj@suse.de> Signed-off-by: Kay Sievers <kay.sievers@vrfy.org> Cc: Roland Dreier <rolandd@cisco.com> Cc: Sean Hefty <sean.hefty@intel.com> Cc: Hal Rosenstock <hal.rosenstock@gmail.com> Cc: James Bottomley <James.Bottomley@HansenPartnership.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* [SCSI] scsi.h: add macro for enclosure bit of inquiry dataJames Bottomley2008-01-231-0/+4
| | | | | | The macro tells us whether the device is (or contains) an enclosure device. Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
* [SCSI] sd: add fix for devices with last sector access problemsHans de Goede2008-01-231-0/+1
| | | | | | | | | | | | This patch adds a new scsi_device flag (last_sector_bug) for devices which contain a bug where the device crashes when the last sector is read in a larger then 1 sector read. This is for example the case with sdcards in the HP PSC1350 printer cardreader and in the HP PSC1610 printer cardreader. Signed-off-by: Hans de Goede <j.w.r.degoede@hhs.nl> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
* [SCSI] sd,sr: add early detection of medium not presentJames Bottomley2008-01-121-1/+1
| | | | | | | | | The current scsi_test_unit_ready() is updated to return sense code information (in struct scsi_sense_hdr). The sd and sr drivers are changed to interpret the sense code return asc 0x3a as no media and adjust the device status accordingly. Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
* [SCSI] move single_lun flag from scsi_device to scsi_targetTony Battersby2008-01-121-3/+3
| | | | | | | | | | | | | | | | | | Some SCSI tape medium changers that need the BLIST_SINGLELUN flag have the medium changer at one LUN and the tape drive at a different LUN. The inquiry string of the tape drive may be different from that of the medium changer. In order for single_lun to be effective, every scsi_device under a given scsi_target must have it set. This means that there needs to be a blacklist entry for BOTH the medium changer AND the tape drive, which is impractical because some medium changers may be paired with a variety of different tape drive models. It makes more sense to put the single_lun flag in scsi_target instead of scsi_device, which causes every device at a given target ID to inherit the single_lun flag from one LUN. This makes it possible to blacklist just the medium changer and not the tape drive. Signed-off-by: Tony Battersby <tonyb@cybernetics.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
* esp_scsi: fix reset cleanup spinlock recursionMaciej W. Rozycki2007-12-111-0/+3
| | | | | | | | | | | | | | | | | | | | | | The esp_reset_cleanup() function is called with the host lock held and invokes starget_for_each_device() which wants to take it too. Here is a fix along the lines of shost_for_each_device()/__shost_for_each_device() adding a __starget_for_each_device() counterpart which assumes the lock has already been taken. Eventually, I think the driver should get modified so that more work is done as a softirq rather than in the interrupt context, but for now it fixes a bug that causes the spinlock debugger to fire. While at it, it fixes a small number of cosmetic problems with starget_for_each_device() too. Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org> Acked-by: David S. Miller <davem@davemloft.net> Cc: James Bottomley <James.Bottomley@steeleye.com> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* SCSI: add asynchronous event notification APIJeff Garzik2007-11-041-0/+25
| | | | | | | Originally based on a patch by Kristen Carlson Accardi @ Intel. Copious input from James Bottomley. Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* [SCSI] Remove unused method scsi_device_cancelPriyanka Gupta2007-07-141-1/+0
| | | | | | | | | Removes an obsolete method scsi_device_cancel which isn't being used anywhere in the kernel. Signed-off-by: Priyanka Gupta <priyankag@google.com> Acked-by: Grant Grundler <grundler@parisc-linux.org> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
* [SCSI] zfcp: Report FCP LUN to SCSI midlayerChristof Schmitt2007-06-201-0/+1
| | | | | | | | | | When reporting SCSI devices to the SCSI midlayer, use the FCP LUN as LUN reported to the SCSI layer. With this approach, zfcp does not have to create unique LUNS, and this code can be removed. Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by: Swen Schillig <swen@vnet.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
* [SCSI] modalias for scsi devicesMichael Tokarev2007-04-181-0/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The following patch adds support for sysfs/uevent modalias attribute for scsi devices (like disks, tapes, cdroms etc), based on whatever current sd.c, sr.c, st.c and osst.c drivers supports. The modalias format is like this: scsi:type-0x04 (for TYPE_WORM, handled by sr.c now). Several comments. o This hexadecimal type value is because all TYPE_XXX constants in include/scsi/scsi.h are given in hex, but __stringify() will not convert them to decimal (so it will NOT be scsi:type-4). Since it does not really matter in which format it is, while both modalias in module and modalias attribute match each other, I descided to go for that 0x%02x format (and added a comment in include/scsi/scsi.h to keep them that way), instead of changing them all to decimal. o There was no .uevent routine for SCSI bus. It might be a good idea to add some more ueven environment variables in there. o osst.c driver handles tapes too, like st.c, but only SOME tapes. With this setup, hotplug scripts (or whatever is used by the user) will try to load both st and osst modules for all SCSI tapes found, because both modules have scsi:type-0x01 alias). It is not harmful, but one extra module is no good either. It is possible to solve this, by exporting more info in modalias attribute, including vendor and device identification strings, so that modalias becomes something like scsi:type-0x12:vendor-Adaptec LTD:device-OnStream Tape Drive and having that, match for all 3 attributes, not only device type. But oh well, vendor and device strings may be large, and they do contain spaces and whatnot. So I left them for now, awaiting for comments first. Signed-off-by: Michael Tokarev <mjt@tls.msk.ru> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
* [SCSI] sd: implement START/STOP managementTejun Heo2007-03-201-0/+1
| | | | | | | | | | | | | | | | | Implement SBC START/STOP management. sdev->mange_start_stop is added. When it's set to one, sd STOPs the device on suspend and shutdown and STARTs it on resume. sdev->manage_start_stop defaults is in sdev instead of scsi_disk cdev to allow ->slave_config() override the default configuration but is exported under scsi_disk sysfs node as sdev->allow_restart is. When manage_start_stop is zero (the default value), this patch doesn't introduce any behavior change. Signed-off-by: Tejun Heo <htejun@gmail.com> Rejections fixed and Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
* [SCSI] Make error printing more verboseMartin K. Petersen2007-03-111-2/+6
| | | | | | | | | | | This patch enhances SCSI error printing by: - Making use of scsi_print_result() in the completion functions. - Having scmd_printk() output the disk name (when applicable). Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
* USB Storage: indistinguishable devices with broken and unbroken firmwareOliver Neukum2007-02-171-0/+1
| | | | | | | | | | | | | | | there's a USB mass storage device which exists in two version. One reports the correct size and the other does not. Apart from that they are identical and cannot be told apart. Here's a heuristic based on the empirical finding that drives have even sizes. Signed-off-by: Oliver Neukum <oneukum@suse.de> Acked-by: Alan Stern <stern@rowland.harvard.edu> Acked-by: Matthew Dharm <mdharm-usb@one-eyed-alien.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* [SCSI] Add ability to scan scsi busses asynchronouslyMatthew Wilcox2006-10-111-15/+15
| | | | | | | | | | | | | | | Since it often takes around 20-30 seconds to scan a scsi bus, it's highly advantageous to do this in parallel with other things. The bulk of this patch is ensuring that devices don't change numbering, and that all devices are discovered prior to trying to start init. For those who build SCSI as modules, there's a new scsi_wait_scan module that will ensure all bus scans are finished. This patch only handles drivers which call scsi_scan_host. Fibre Channel, SAS, SATA, USB and Firewire all need additional work. Signed-off-by: Matthew Wilcox <matthew@wil.cx> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
* [PATCH] scsi: device_reprobe() can failAndrew Morton2006-10-011-2/+2
| | | | | | | | | | device_reprobe() should return an error code. When it does so, scsi_device_reprobe() should propagate it back. Acked-by: Jeff Garzik <jeff@garzik.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [SCSI] add scsi_mode_select to scsi_lib.cJames Bottomley2006-03-191-0/+5
| | | | | | This complements the scsi_mode_sense() function Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
* [SCSI] add scsi_reprobe_deviceJames Bottomley2006-03-141-0/+5
| | | | | | | Original from Christoph Hellwig and Eric Moore. This version exports the scsi_reprobe_device() function as an inline. Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
* [SCSI] fix scsi process problems and clean up the target reap issuesJames Bottomley2006-02-281-0/+10
| | | | | | | | | | | | In order to use the new execute_in_process_context() API, you have to provide it with the work storage, which I do in SCSI in scsi_device and scsi_target, but which also means that we can no longer queue up the target reaps, so instead I moved the target to a state model which allows target_alloc to detect if we've received a dying target and wait for it to be gone. Hopefully, this should also solve the target namespace race. Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
* [SCSI] Recognize missing LUNs for non-standard devicesAlan Stern2006-02-281-1/+4
| | | | | | | | | | | Some non-standard SCSI targets or protocols, such as USB UFI, report "no LUN present" by setting the Peripheral Device Type to 0x1f and the Peripheral Qualifier to 0 (not 3 as the standard requires) in the INQUIRY response. This patch (as650b) adds a new target flag and code to accomodate such targets. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
* [SCSI] Remove devfs support from the SCSI subsystemGreg KH2006-02-281-1/+0
| | | | | | | | | | | | As devfs has been disabled from the kernel tree for a number of months now (5 to be exact), here's a patch against 2.6.16-rc1-git1 that removes support for it from the SCSI subsystem. The patch also removes the scsi_disk devfs_name field as it's no longer needed. Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
* [SCSI] Prevent scsi_execute_async from guessing cdb lengthbrking@us.ibm.com2006-01-261-1/+1
| | | | | | | | | | | | | | When the scsi_execute_async interface was added it ended up reducing the flexibility of userspace to send arbitrary scsi commands through sg using SG_IO. The SG_IO interface allows userspace to specify the CDB length. This is now ignored in scsi_execute_async and it is guessed using the COMMAND_SIZE macro, which is not always correct, particularly for vendor specific commands. This patch adds a cmd_len parameter to the scsi_execute_async interface to allow the caller to specify the length of the CDB. Signed-off-by: Brian King <brking@us.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
* [SCSI] Convert SCSI mid-layer to scsi_execute_asyncMike Christie2005-12-151-0/+6
| | | | | | | | | | | | | | | | | Add scsi helpers to create really-large-requests and convert scsi-ml to scsi_execute_async(). Per Jens's previous comments, I placed this function in scsi_lib.c. I made it follow all the queue's limits - I think I did at least :), so I removed the warning on the function header. I think the scsi_execute_* functions should eventually take a request_queue and be placed some place where the dm-multipath hw_handler can use them if that failover code is going to stay in the kernel. That conversion patch will be sent in another mail though. Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
* [SCSI] correct some dropped const compiler warningsJames Bottomley2005-12-141-3/+3
| | | | | | | Make the vendor, model and rev fields in scsi_device pointers to const and update a few prototypes of functions using them. Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
* [SCSI] introduce sfoo_printk, sfoo_id, sfoo_channel helpersJeff Garzik2005-10-291-0/+16
| | | | | | | | | | | | | | | | | | New dev_printk wrappers, which allow us to shrink code, and eliminate direct references to host/channel/id/lun members: scmd_printk() Introduce wrappers for highly common idioms, which may also help us eliminate some ->{channel,id} references in the future: {scmd,sdev}_id() {scmd,sdev}_channel() The scmd_* wrappers are present in scsi/scsi_device.h because they all employ the dereference chain cmd->device->$member. We would prefer to use static inline functions rather than macros, but that would have a Rejections fixed up and Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
* [SCSI] move the mid-layer printk's over to shost/starget/sdev_printkJames Bottomley2005-10-281-0/+6
| | | | | | | | | This should eliminate (at least in the mid layer) to make numeric assumptions about any of the enumeration variables. As a side effect, it will also make all the messages consistent and line us up nicely for the error logging strategy (if it ever shows itself again). Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
* [SCSI] allow REPORT LUN scanning even for LUN 0 PQ of 3James Bottomley2005-09-251-0/+1
| | | | | | | | | | | Currently we just ignore the device, which means there are a few arrays out there that we don't find. This patch updates the scsi_report_lun_scan() to take a target instead of a device so it can be called on a return of SCSI_SCAN_TARGET_PRESENT, which is what a PQ 3 device returns. Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
* [SCSI] Alter the scsi_add_device() API to conform to what users expectJames Bottomley2005-09-101-2/+2
| | | | | | | | | | | | | | | | | The original API returned either an ERR_PTR() or a refcounted sdev. Unfortunately, if it's successful, you need to do a scsi_device_put() on the sdev otherwise the refcounting is wrong. Everyone seems to expect that scsi_add_device() should be callable without doing the ref put, so alter the API so it is (we still have __scsi_add_device with the original behaviour). The only actual caller that needs altering is the one in firewire ... not because it gets this right, but because it acts on the error if one is returned. Acked-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
* [SCSI] convert sd to scsi_execute_req (and update the scsi_execute_req API)James Bottomley2005-08-281-9/+5
| | | | | | | | | This one removes struct scsi_request entirely from sd. In the process, I noticed we have no callers of scsi_wait_req who don't immediately normalise the sense, so I updated the API to make it take a struct scsi_sense_hdr instead of simply a big sense buffer. Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
* [SCSI] convert SPI transport class to scsi_executeJames Bottomley2005-08-281-0/+13
| | | | | | | | | | | This one's slightly more difficult. The transport class uses REQ_FAILFAST, so another interface (scsi_execute) had to be invented to take the extra flag. Also, the sense functions are shifted around to allow spi_execute to place data directly into a struct scsi_sense_hdr. With this change, there's probably a lot of unnecessary sense buffer allocation going on which we can fix later. Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
* [SCSI] convert the remaining mid-layer pieces to scsi_execute_reqJames Bottomley2005-08-281-2/+11
| | | | | | | After this, we just have some drivers, all the ULDs and the SPI transport class using scsi_wait_req(). Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
* [SCSI] fix function prototype warningJames Bottomley2005-07-141-1/+1
| | | | | | | | int_to_scsilun() takes a pointer to a struct scsi_lun in it's prototype, so add this structure to scsi_device.h to avoid declaration inside function prototype warnings. Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
* [SCSI] add int_to_scsilun() functionJames.Smart@Emulex.Com2005-07-141-0/+1
| | | | | | | | | | | | | | | | | | | | | | One of the issues we had was reverting the midlayers lun value into the 8byte lun value that we wanted to send to the device. Historically, there's been some combination of byte swapping, setting high/low, etc. There's also been no common thread between how our driver did it and others. I also got very confused as to why byteswap routines were being used. Anyway, this patch is a LLDD-callable function that reverts the midlayer's lun value, stored in an int, to the 8-byte quantity (note: this is not the real 8byte quantity, just the same amount that scsilun_to_int() was able to convert and store originally). This also solves the dilemma of the thread: http://marc.theaimsgroup.com/?l=linux-kernel&m=112116767118981&w=2 A patch for the lpfc driver to use this function will be along in a few days (batched with other patches). Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
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