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* aoe: convert emsgs_sema into a completionMatthias Kaehlcke2008-07-25
| | | | | | | | | | ATA over Ethernet: The semaphore emsgs_sema is used for signalling an event, convert it in a completion. Signed-off-by: Matthias Kaehlcke <matthias@kaehlcke.net> Cc: "Ed L. Cashin" <ecashin@coraid.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* virtio_blk: check for hardsector size from hostChristian Borntraeger2008-07-24
| | | | | | | | | | | | Currently virtio_blk assumes a 512 byte hard sector size. This can cause trouble / performance issues if the backing has a different block size (like a file on an ext3 file system formatted with 4k block size or a dasd). Lets add a feature flag that tells the guest to use a different hard sector size than 512 byte. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* device create: block: convert device_create to device_create_drvdataGreg Kroah-Hartman2008-07-22
| | | | | | | | device_create() is race-prone, so use the race-free device_create_drvdata() instead as device_create() is going away. Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* m68k: Return -ENODEV if no device is foundGeert Uytterhoeven2008-07-20
| | | | | | | | According to the tests in do_initcalls(), the proper error code in case no device is found is -ENODEV, not -ENXIO or -EIO. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* hd.c: remove the #include <linux/mc146818rtc.h>Adrian Bunk2008-07-16
| | | | | | | | | The code that needed this #include was removed one year ago. Signed-off-by: Adrian Bunk <bunk@kernel.org> Cc: rmk@arm.linux.org.uk Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
* update the BLK_DEV_HD help textAdrian Bunk2008-07-16
| | | | | | | | | | | | Many people will see this option the first time now that it is in drivers/block/ Make it clear that virtually noone needs it. Signed-off-by: Adrian Bunk <bunk@kernel.org> Cc: rmk@arm.linux.org.uk Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
* move ide/legacy/hd.c to drivers/block/Adrian Bunk2008-07-16
| | | | | | | | | This patch moves hd.c to drivers/block/ Signed-off-by: Adrian Bunk <bunk@kernel.org> Cc: rmk@arm.linux.org.uk Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/bart/ide-2.6Linus Torvalds2008-07-15
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/bart/ide-2.6: (80 commits) ide-floppy: fix unfortunate function naming ide-tape: unify idetape_create_read/write_cmd ide: add ide_pc_intr() helper ide-{floppy,scsi}: read Status Register before stopping DMA engine ide-scsi: add more debugging to idescsi_pc_intr() ide-scsi: use pc->callback ide-floppy: add more debugging to idefloppy_pc_intr() ide-tape: always log debug info in idetape_pc_intr() if debugging is enabled ide-tape: add ide_tape_io_buffers() helper ide-tape: factor out DSC handling from idetape_pc_intr() ide-{floppy,tape}: move checking of ->failed_pc to ->callback ide: add ide_issue_pc() helper ide: add PC_FLAG_DRQ_INTERRUPT pc flag ide-scsi: move idescsi_map_sg() call out from idescsi_issue_pc() ide: add ide_transfer_pc() helper ide-scsi: set drive->scsi flag for devices handled by the driver ide-{cd,floppy,tape}: remove checking for drive->scsi ide: add PC_FLAG_ZIP_DRIVE pc flag ide-tape: factor out waiting for good ireason from idetape_transfer_pc() ide-tape: set PC_FLAG_DMA_IN_PROGRESS flag in idetape_transfer_pc() ...
| * block: convert pd_special_command to use blk_execute_rqFUJITA Tomonori2008-07-15
| | | | | | | | | | | | | | | | | | | | | | | | pd_special_command uses blk_put_request with struct request on the stack. As a result, blk_put_request needs a hack to catch a NULL request_queue. This converts pd_special_command to use blk_execute_rq. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: Borislav Petkov <petkovbb@gmail.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
* | Merge branch 'bkl-removal' of git://git.lwn.net/linux-2.6Linus Torvalds2008-07-14
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'bkl-removal' of git://git.lwn.net/linux-2.6: (146 commits) IB/umad: BKL is not needed for ib_umad_open() IB/uverbs: BKL is not needed for ib_uverbs_open() bf561-coreb: BKL unneeded for open() Call fasync() functions without the BKL snd/PCM: fasync BKL pushdown ipmi: fasync BKL pushdown ecryptfs: fasync BKL pushdown Bluetooth VHCI: fasync BKL pushdown tty_io: fasync BKL pushdown tun: fasync BKL pushdown i2o: fasync BKL pushdown mpt: fasync BKL pushdown Remove BKL from remote_llseek v2 Make FAT users happier by not deadlocking x86-mce: BKL pushdown vmwatchdog: BKL pushdown vmcp: BKL pushdown via-pmu: BKL pushdown uml-random: BKL pushdown uml-mmapper: BKL pushdown ...
| * | Merge commit 'v2.6.26' into bkl-removalJonathan Corbet2008-07-14
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| * | paride: cdev lock_kernel() pushdownJonathan Corbet2008-06-20
| | | | | | | | | | | | Signed-off-by: Jonathan Corbet <corbet@lwn.net>
| * | AoE: cdev lock_kernel() pushdownJonathan Corbet2008-06-20
| | | | | | | | | | | | Signed-off-by: Jonathan Corbet <corbet@lwn.net>
* | | Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-blockLinus Torvalds2008-07-14
|\ \ \ | |_|/ |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'for-linus' of git://git.kernel.dk/linux-2.6-block: (37 commits) splice: fix generic_file_splice_read() race with page invalidation ramfs: enable splice write drivers/block/pktcdvd.c: avoid useless memset cdrom: revert commit 22a9189 (cdrom: use kmalloced buffers instead of buffers on stack) scsi: sr avoids useless buffer allocation block: blk_rq_map_kern uses the bounce buffers for stack buffers block: add blk_queue_update_dma_pad DAC960: push down BKL pktcdvd: push BKL down into driver paride: push ioctl down into driver block: use get_unaligned_* helpers block: extend queue_flag bitops block: request_module(): use format string Add bvec_merge_data to handle stacked devices and ->merge_bvec() block: integrity flags can't use bit ops on unsigned short cmdfilter: extend default read filter sg: fix odd style (extra parenthesis) introduced by cmd filter patch block: add bounce support to blk_rq_map_user_iov cfq-iosched: get rid of enable_idle being unused warning allow userspace to modify scsi command filter on per device basis ...
| * | drivers/block/pktcdvd.c: avoid useless memsetChristophe Jaillet2008-07-04
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Avoid the 'memset(...,0, ...)' before calling 'init_cdrom_command' because this function already does it. Signed-off-by: Christophe Jaillet <jaillet.christophe@wanadoo.fr> Acked-by: Peter Osterlund <petero2@telia.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
| * | DAC960: push down BKLAlan Cox2008-07-04
| | | | | | | | | | | | | | | | | | | | | Signed-off-by: Alan Cox <alan@redhat.com> Cc: Richard Knutsson <ricknu-0@student.ltu.se> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
| * | pktcdvd: push BKL down into driverAlan Cox2008-07-04
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Push the lock_kernel down into the driver and switch to unlocked_ioctl [akpm@linux-foundation.org: build fix] Signed-off-by: Alan Cox <alan@redhat.com> Acked-by: Peter Osterlund <petero2@telia.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
| * | paride: push ioctl down into driverAlan Cox2008-07-04
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Leaves us with lock_kernel for two methods. Also remove a bogus printk with no printk level and return -ENOTTY not -EINVAL for correctness. Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> (Jens: added smp_lock.h include to pt.c, otherwise it wont compile because of missing {un}lock_kernel() definition) Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
| * | block: use get_unaligned_* helpersHarvey Harrison2008-07-04
| | | | | | | | | | | | | | | | | | Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
| * | Add bvec_merge_data to handle stacked devices and ->merge_bvec()Alasdair G Kergon2008-07-03
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When devices are stacked, one device's merge_bvec_fn may need to perform the mapping and then call one or more functions for its underlying devices. The following bio fields are used: bio->bi_sector bio->bi_bdev bio->bi_size bio->bi_rw using bio_data_dir() This patch creates a new struct bvec_merge_data holding a copy of those fields to avoid having to change them directly in the struct bio when going down the stack only to have to change them back again on the way back up. (And then when the bio gets mapped for real, the whole exercise gets repeated, but that's a problem for another day...) Signed-off-by: Alasdair G Kergon <agk@redhat.com> Cc: Neil Brown <neilb@suse.de> Cc: Milan Broz <mbroz@redhat.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
| * | xen: Avoid allocations causing swap activity on the resume pathIan Campbell2008-07-03
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Avoid allocations causing swap activity on the resume path by preventing the allocations from doing IO and allowing them to access the emergency pools. These paths are used when a frontend device is trying to connect to its backend driver over Xenbus. These reconnections are triggered on demand by IO, so by definition there is already IO underway, and further IO would naturally deadlock. On resume, this path is triggered when the running system tries to continue using its devices. If it cannot then the resume will fail; to try to avoid this we let it dip into the emergency pools. [ linux-2.6.18-xen changesets e8b49cfbdac, fdb998e79aba ] Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
| * | xen/blkfront: add __exit to module_exit() handlersJan Beulich2008-07-03
| | | | | | | | | | | | | | | | | | Signed-off-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
| * | xen/blkfront: Make sure that the device is fully ready before allowing release.Wim Colgate2008-07-03
| | | | | | | | | | | | | | | | | | | | | | | | [ linux-2.6.18-xen changeset c1c57fea77e9 ] Signed-off-by: Wim Colgate <wim@xensource.com> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
| * | xen/blkfront: Add the CDROM_GET_CAPABILITY ioctl to blkfront.Christian Limpach2008-07-03
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Return 0 instead of -EINVAL if the blkfront device is a cdrom, i.e. had the VDISK_CDROM attribute. This allows udev's cdrom_id to correctly detect the device as a cdrom device. [ Add blkif_ioctl, and CDROMMULTISESSION ] [ linux-2.6.18-xen changeset d2bd9af846b5 ] Signed-off-by: Christian Limpach <Christian.Limpach@xensource.com> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
| * | xen/blkfront: Make sure we don't use bounce buffers, we don't need them.Ian Campbell2008-07-03
| | | | | | | | | | | | | | | | | | | | | | | | [ linux-2.6.18-xen changeset 667228bf8fc5 ] Signed-off-by: Ian Campbell <ian.campbell@xensource.com> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* | | cciss: read config to obtain max outstanding commands per controllerMike Miller2008-07-04
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch changes the way we determine the maximum number of outstanding commands for each controller. Most Smart Array controllers can support up to 1024 commands, the notable exceptions are the E200 and E200i. The next generation of controllers which were just added support a mode of operation called Zero Memory Raid (ZMR). In this mode they only support 64 outstanding commands. In Full Function Raid (FFR) mode they support 1024. We have been setting the queue depth by arbitrarily assigning some value for each controller. We needed a better way to set the queue depth to avoid lots of annoying "fifo full" messages. So we made the driver a little smarter. We now read the config table and subtract 4 from the returned value. The -4 is to allow some room for ioctl calls which are not tracked the same way as io commands are tracked. Please consider this for inclusion. Signed-off-by: Mike Miller <mike.miller@hp.com> Cc: Jens Axboe <jens.axboe@oracle.com> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | cciss: fix regression that no device nodes are created if no logical drives ↵Stephen M. Cameron2008-07-04
|/ / | | | | | | | | | | | | | | | | | | | | | | are configured. Fix regression in cciss driver that if no logical drives are configured, no device nodes at all get created. Signed-off-by: Stephen M. Cameron <scameron@beardog.cca.cpqcorp.net> Acked-by: Mike Miller <mike.miller@hp.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | cciss: add new hardware supportMike Miller2008-06-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Add support for the next generation of HP Smart Array SAS/SATA controllers. Shipping date is late Fall 2008. Bump the driver version to 3.6.20 to reflect the new hardware support from patch 1 of this set. Signed-off-by: Mike Miller <mike.miller@hp.com> Cc: Jens Axboe <jens.axboe@oracle.com> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | Add 'rd' alias to new brd ramdisk driverNick Piggin2008-06-05
| | | | | | | | | | | | | | Alias brd to rd in the hope of helping legacy users. Suggested by Jan. Signed-off-by: Nick Piggin <npiggin@suse.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | virtio_blk: allow read-only disksChristian Borntraeger2008-05-30
| | | | | | | | | | | | | | | | | | | | | | | | Hello Rusty, sometimes it is useful to share a disk (e.g. usr). To avoid file system corruption, the disk should be mounted read-only in that case. This patch adds a new feature flag, that allows the host to specify, if the disk should be considered read-only. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* | Fix crash in virtio_blk during modprobe ; rmmod ; modprobeChris Lalancette2008-05-30
| | | | | | | | | | | | | | | | Fix a modprobe virtio_blk ; rmmod virtio_blk ; modprobe virtio_blk crash; this was basically because we weren't doing "del_gendisk()" in the remove path. Signed-off-by: Chris Lalancette <clalance@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> (moved del_gendisk up)
* | brd: don't show ramdisks in /proc/partitionsMarcin Krol2008-05-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In 2.6.25, ramdisk devices show up in /proc/partitions, which is a behaviour change from the old rd.c. Add GENHD_FL_SUPPRESS_PARTITION_INFO, which was present in rd.c. All kernels prior to 2.6.25 weren't displaying ramdisks in /proc/partitions. Since there are many userspace tools using information from /proc/partitions some of them may now behave incorrectly (I didn't tested any though). For example before 2.6.25 /proc/partitions was empty if no block devices like hard disks and such were detected by kernel. Now all 16 ramdisks are always visible there. Some software may rely on such information (I mean, on empty /proc/partitions). There was quite similar situation back in 2004, and ramdisks were excluded back from displaying. Thats why I called this a regression (maybe a bit unfortunate). See this patch for info: http://kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.3-rc2/2.6.3-rc2-mm1/broken-out/nbd-proc-partitions-fix.patch I also think that someone somewhere (long time ago) excluded ramdisks from /proc/partitions for good reasons. It is possible that now such new "feature" is harmless, but I think there are more chances that someone will say "hey, /proc/partitions has changed, now my software doesn't work" then "hey where did my new 2.6.25 feature go". nbd devices are also excluded, maybe for very same (unknown to me) reasons. Signed-off-by: Marcin Krol <hawk@pld-linux.org> Signed-off-by: Nick Piggin <npiggin@suse.de> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | [POWERPC] iSeries: Remove unused mail addressStephen Rothwell2008-05-23
|/ | | | | | | | I don't use my IBM email address normally and people can find me in CREDITS. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
* m68k: Return -ENODEV if no device is foundGeert Uytterhoeven2008-05-18
| | | | | | | | According to the tests in do_initcalls(), the proper error code in case no device is found is -ENODEV, not -ENXIO or -EIO. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* block: avoid duplicate calls to get_part() in disk stat codeJens Axboe2008-05-07
| | | | | | | | | get_part() is fairly expensive, as it O(N) loops over partitions to find the right one. In lots of normal IO paths we end up looking up the partition twice, to make matters even worse. Change the stat add code to accept a passed in partition instead. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6Linus Torvalds2008-05-02
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6: (32 commits) USB GADGET/PERIPHERAL: g_file_storage Bulk-Only Transport compliance, clear-feature ignore USB GADGET/PERIPHERAL: g_file_storage Bulk-Only Transport compliance usb_serial: some coding style fixes USB: Remove redundant dependencies on USB_ATM. USB: UHCI: disable remote wakeup when it's not needed USB: OHCI: work around bogus compiler warning USB: add Cypress c67x00 OTG controller HCD driver USB: add Cypress c67x00 OTG controller core driver USB: add Cypress c67x00 low level interface code USB: airprime: unlock mutex instead of trying to lock it again USB: storage: Update mailling list address USB: storage: UNUSUAL_DEVS() for PanDigital Picture frame. USB: Add the USB 2.0 extension descriptor. USB: add more FTDI device ids USB: fix cannot work usb storage when using ohci-sm501 usb: gadget zero timer init fix usb: gadget zero style fixups (mostly whitespace) usb serial gadget: CDC ACM fixes usb: pxa27x_udc driver USB: INTOVA Pixtreme camera mass storage device ...
| * ub: CosmeticsPete Zaitcev2008-05-02
| | | | | | | | | | | | | | | | Fix a few comments and printk statements. Signed-off-by: Pete Zaitcev <zaitcev@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| * ub: Ignore bad residuePete Zaitcev2008-05-02
| | | | | | | | | | | | | | | | | | | | | | I hoped to continue to ignore this problem or use libusual, but these days it's simpler to work around than to deal with it. Let's attempt to use bad residue devices and hope that upper level integrity checks catch any problems (e.g. please use sha1sum on your backups). Signed-off-by: Pete Zaitcev <zaitcev@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| * ub: Tune retriesPete Zaitcev2008-05-02
| | | | | | | | | | | | | | | | Make ub to fail faster in hopeless cases. Signed-off-by: Pete Zaitcev <zaitcev@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| * ub: Fix timeoutsPete Zaitcev2008-05-02
| | | | | | | | | | | | | | | | | | | | | | | | | | | | The wodim says: "close track/session scsi sendcmd: cmd timeout after 5.000 (480) s" This happened because we ignored the supplied timeout and used 5s. It's not completely correct to apply a timeout meant for the complete command to any single URB, but we don't have many URBs per command, so this is simple and works. Signed-off-by: Pete Zaitcev <zaitcev@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* | virtio: add virtio disk geometry featureRyan Harper2008-05-02
| | | | | | | | | | | | | | | | | | | | Rather than faking up some geometry, allow the backend to push the disk geometry via virtio pci config option. Keep the old geo code around for compatibility. Signed-off-by: Ryan Harper <ryanh@us.ibm.com> Reviewed-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> (modified to single struct)
* | virtio: explicit advertisement of driver featuresRusty Russell2008-05-02
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | A recent proposed feature addition to the virtio block driver revealed some flaws in the API: in particular, we assume that feature negotiation is complete once a driver's probe function returns. There is nothing in the API to require this, however, and even I didn't notice when it was violated. So instead, we require the driver to specify what features it supports in a table, we can then move the feature negotiation into the virtio core. The intersection of device and driver features are presented in a new 'features' bitmap in the struct virtio_device. Note that this highlights the difference between Linux unsigned-long bitmaps where each unsigned long is in native endian, and a straight-forward little-endian array of bytes. Drivers can still remove feature bits in their probe routine if they really have to. API changes: - dev->config->feature() no longer gets and acks a feature. - drivers should advertise their features in the 'feature_table' field - use virtio_has_feature() for extra sanity when checking feature bits Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* | virtio: change config to guest endian.Rusty Russell2008-05-02
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | A recent proposed feature addition to the virtio block driver revealed some flaws in the API, in particular how easy it is to break big endian machines. The virtio config space was originally chosen to be little-endian, because we thought the config might be part of the PCI config space for virtio_pci. It's actually a separate mmio region, so that argument holds little water; as only x86 is currently using the virtio mechanism, we can change this (but must do so now, before the impending s390 merge). API changes: - __virtio_config_val() just becomes a striaght vdev->config_get() call. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* | virtio-blk: fix remove oopsMarcelo Tosatti2008-05-02
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Do not unregister the major at device remove, since there might be another device instances around. (qemu) pci_del 0 11 (qemu) ACPI: PCI interrupt for device 0000:00:0b.0 disabled (qemu) pci_del 0 10 (qemu) ------------[ cut here ]------------ WARNING: at block/genhd.c:126 unregister_blkdev+0x74/0x9e() ACPI: PCI interrupt for device 0000:00:0a.0 disabled Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* | virtio: de-structify virtio_block status byteRusty Russell2008-05-02
|/ | | | | | | | | Ron Minnich points out that a struct containing a char is not always sizeof(char); simplest to remove the structure to avoid confusion. Cc: "ron minnich" <rminnich@gmail.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* cciss: assign PDE->data before gluing PDE into /proc treeDenis V. Lunev2008-05-01
| | | | | | | | | | | | Simply replace proc_create and further data assigned with proc_create_data. Signed-off-by: Denis V. Lunev <den@openvz.org> Cc: Alexey Dobriyan <adobriyan@openvz.org> Cc: Eric W. Biederman <ebiederm@xmission.com> Acked-by: Mike Miller <mike.miller@hp.com> Cc: Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* brd: modify ramdisk device to be able to manage partitionsLaurent Vivier2008-04-30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds partition management for Block RAM Device (BRD). This patch is done to keep in sync BRD and loop device drivers. This patch adds a parameter to the module, max_part, to specify the maximum number of partitions per RAM device. Example: # modprobe brd max_part=63 # ls -l /dev/ram* brw-rw---- 1 root disk 1, 0 2008-04-03 13:39 /dev/ram0 brw-rw---- 1 root disk 1, 64 2008-04-03 13:39 /dev/ram1 brw-rw---- 1 root disk 1, 640 2008-04-03 13:39 /dev/ram10 brw-rw---- 1 root disk 1, 704 2008-04-03 13:39 /dev/ram11 brw-rw---- 1 root disk 1, 768 2008-04-03 13:39 /dev/ram12 brw-rw---- 1 root disk 1, 832 2008-04-03 13:39 /dev/ram13 brw-rw---- 1 root disk 1, 896 2008-04-03 13:39 /dev/ram14 brw-rw---- 1 root disk 1, 960 2008-04-03 13:39 /dev/ram15 brw-rw---- 1 root disk 1, 128 2008-04-03 13:39 /dev/ram2 brw-rw---- 1 root disk 1, 192 2008-04-03 13:39 /dev/ram3 brw-rw---- 1 root disk 1, 256 2008-04-03 13:39 /dev/ram4 brw-rw---- 1 root disk 1, 320 2008-04-03 13:39 /dev/ram5 brw-rw---- 1 root disk 1, 384 2008-04-03 13:39 /dev/ram6 brw-rw---- 1 root disk 1, 448 2008-04-03 13:39 /dev/ram7 brw-rw---- 1 root disk 1, 512 2008-04-03 13:39 /dev/ram8 brw-rw---- 1 root disk 1, 576 2008-04-03 13:39 /dev/ram9 # fdisk /dev/ram0 Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel Building a new DOS disklabel. Changes will remain in memory only, until you decide to write them. After that, of course, the previous content won't be recoverable. Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite) Command (m for help): o Building a new DOS disklabel. Changes will remain in memory only, until you decide to write them. After that, of course, the previous content won't be recoverable. Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite) Command (m for help): n Command action e extended p primary partition (1-4) p Partition number (1-4): 1 First cylinder (1-2, default 1): 1 Last cylinder or +size or +sizeM or +sizeK (1-2, default 2): 2 Command (m for help): w The partition table has been altered! Calling ioctl() to re-read partition table. Syncing disks. # ls -l /dev/ram0* brw-rw---- 1 root disk 1, 0 2008-04-03 13:40 /dev/ram0 brw-rw---- 1 root disk 1, 1 2008-04-03 13:40 /dev/ram0p1 # mkfs /dev/ram0p1 mke2fs 1.40-WIP (14-Nov-2006) Filesystem label= OS type: Linux Block size=1024 (log=0) Fragment size=1024 (log=0) 4016 inodes, 16032 blocks 801 blocks (5.00%) reserved for the super user First data block=1 Maximum filesystem blocks=16515072 2 block groups 8192 blocks per group, 8192 fragments per group 2008 inodes per group Superblock backups stored on blocks: 8193 Writing inode tables: done Writing superblocks and filesystem accounting information: done This filesystem will be automatically checked every 26 mounts or 180 days, whichever comes first. Use tune2fs -c or -i to override. # mount /dev/ram0p1 /mnt df /mnt Filesystem 1K-blocks Used Available Use% Mounted on /dev/ram0p1 15521 138 14582 1% /mnt # ls -l /mnt total 12 drwx------ 2 root root 12288 2008-04-03 13:41 lost+found # umount /mnt # rmmod brd Signed-off-by: Laurent Vivier <Laurent.Vivier@bull.net> Acked-by: Nick Piggin <nickpiggin@yahoo.com.au> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Jens Axboe <jens.axboe@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-blockLinus Torvalds2008-04-29
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'for-linus' of git://git.kernel.dk/linux-2.6-block: block: Skip I/O merges when disabled block: add large command support block: replace sizeof(rq->cmd) with BLK_MAX_CDB ide: use blk_rq_init() to initialize the request block: use blk_rq_init() to initialize the request block: rename and export rq_init() block: no need to initialize rq->cmd with blk_get_request block: no need to initialize rq->cmd in prepare_flush_fn hook block/blk-barrier.c:blk_ordered_cur_seq() mustn't be inline block/elevator.c:elv_rq_merge_ok() mustn't be inline block: make queue flags non-atomic block: add dma alignment and padding support to blk_rq_map_kern unexport blk_max_pfn ps3disk: Remove superfluous cast block: make rq_init() do a full memset() relay: fix splice problem
| * block: use blk_rq_init() to initialize the requestFUJITA Tomonori2008-04-29
| | | | | | | | | | | | | | | | | | | | | | | | Any path needs to call it to initialize the request. This is a preparation for large command support, which needs to initialize the request in a proper way (that is, just doing a memset() will not work). Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: Jens Axboe <jens.axboe@oracle.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
| * block: no need to initialize rq->cmd with blk_get_requestFUJITA Tomonori2008-04-29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | blk_get_request initializes rq->cmd (rq_init does) so the users don't need to do that. The purpose of this patch is to remove sizeof(rq->cmd) and &rq->cmd, as a preparation for large command support, which changes rq->cmd from the static array to a pointer. sizeof(rq->cmd) will not make sense and &rq->cmd won't work. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: James Bottomley <James.Bottomley@HansenPartnership.com> Cc: Alasdair G Kergon <agk@redhat.com> Cc: Jens Axboe <jens.axboe@oracle.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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