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* shared tag queue barrier commentNick Piggin2007-09-141-0/+10
| | | | | | | | | | | | | Should add some comments for the tag barriers (they won't be so important if we can switch over to the explicit _lock bitops, but for now we should make it clear). Jens' original patch said a barrier after the test_and_clear_bit was also required. I can't see why (and it would prevent the use of the _lock bitop). Acked-by: Jens Axboe <jens.axboe@oracle.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> --
* Fix race with shared tag queue mapsJens Axboe2007-09-131-6/+7
| | | | | | | | | | | | | | | | | | | | | | There's a race condition in blk_queue_end_tag() for shared tag maps, users include stex (promise supertrak thingy) and qla2xxx. The former at least has reported bugs in this area, not sure why we haven't seen any for the latter. It could be because the window is narrow and that other conditions in the qla2xxx code hide this. It's a real bug, though, as the stex smp users can attest. We need to ensure two things - the tag bit clearing needs to happen AFTER we cleared the tag pointer, as the tag bit clearing/setting is what protects this map. Secondly, we need to ensure that the visibility of the tag pointer and tag bit clear are ordered properly. [ I removed the SMP barriers - "test_and_clear_bit()" already implies all the required barriers. -- Linus ] Also see http://bugzilla.kernel.org/show_bug.cgi?id=7842 Signed-off-by: Jens Axboe <jens.axboe@oracle.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Fix remap handling by blktraceAlan D. Brunelle2007-08-111-0/+4
| | | | | | | | | | | | | This patch provides more information concerning REMAP operations on block IOs. The additional information provides clearer details at the user level, and supports post-processing analysis in btt. o Adds in partition remaps on the same device. o Fixed up the remap information in DM to be in the right order o Sent up mapped-from and mapped-to device information Signed-off-by: Alan D. Brunelle <alan.brunelle@hp.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* [SCSI] bsg: update sg_io_v4 structureFUJITA Tomonori2007-07-311-3/+7
| | | | | | | | | | | | | | | | | This updates sg_io_v4 structure (based on Doug's RFC, release 1.3). The major changes are: - add dout_resid field - increase tag size to 64 bits to comply with SAM-4 and SRP - add dout_iovec_count and din_iovec_count dout_iovec_count and din_iovec_count aren't supported now. I'm not sure whether they will be supported or not but they were added for the possible future changes. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
* Merge master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-rc-fixes-2.6Linus Torvalds2007-07-291-48/+30
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-rc-fixes-2.6: (28 commits) [SCSI] mpt fusion: Changes in mptctl.c for logging support [SCSI] mpt fusion: Changes in mptfc.c mptlan.c mptsas.c and mptspi.c for logging support [SCSI] mpt fusion: Changes in mptscsih.c for logging support [SCSI] mpt fusion: Changes in mptbase.c for logging support [SCSI] mpt fusion: logging support in Kconfig, Makefile, mptbase.h and addition of mptdebug.h [SCSI] libsas: Fix potential NULL dereference in sas_smp_get_phy_events() [SCSI] bsg: Fix build for CONFIG_BLOCK=n [SCSI] aacraid: fix Sunrise Lake reset handling [SCSI] aacraid: add SCSI SYNCHONIZE_CACHE range checking [SCSI] add easyRAID to the no report luns blacklist [SCSI] advansys: lindent and other large, uninteresting changes [SCSI] aic79xx, aic7xxx: Fix incorrect width setting [SCSI] qla2xxx: fix to honor ignored parameters in sysfs attributes [SCSI] aacraid: draw line in sand, sundry cleanup and version update [SCSI] iscsi_tcp: Turn off bounce buffers [SCSI] libiscsi: fix cmd seqeunce number checking [SCSI] iscsi_tcp, ib_iser Enable module refcounting for iscsi host template [SCSI] libiscsi: make sure session is not blocked when removing host [SCSI] libsas: Remove PCI dependencies [SCSI] simscsi: convert to use the data buffer accessors ...
| * [SCSI] bsg: Fix build for CONFIG_BLOCK=nPaul Mundt2007-07-281-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BLK_DEV_BSG was added outside of the if BLOCK check, which allows it to be enabled when CONFIG_BLOCK=n. This leads to many screenlengths of errors, starting with a parse error on the request_queue_t definition. Obviously this wasn't intended for CONFIG_BLOCK=n usage, so just move the option back in to the block. Caught with a randconfig on sh. Signed-off-by: Paul Mundt <lethal@linux-sh.org> Acked-by: Jens Axboe <jens.axboe@oracle.com> Acked-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
| * [SCSI] bsg: remove unnecessary code and commentsFUJITA Tomonori2007-07-231-9/+0
| | | | | | | | | | | | | | | | - kill uhdr in bsg_command structure - it's not necessary to put SG v4 stuff to block/scsi_ioctl.c Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
| * [SCSI] bsg: use lib/idr.c to find a unique minor numberFUJITA Tomonori2007-07-231-39/+30
| | | | | | | | | | | | | | | | | | This replaces the current linear search for a unique minor number with lib/idr.c. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Acked-by: Jens Axboe <jens.axboe@oracle.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
* | blktrace: use cpu_clock() instead of sched_clock()Ingo Molnar2007-07-271-10/+10
| | | | | | | | | | | | | | | | use cpu_clock() instead of sched_clock(). (the latter is not a proper clock-source) Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* | bsg: Fix build for CONFIG_BLOCK=nPaul Mundt2007-07-271-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BLK_DEV_BSG was added outside of the if BLOCK check, which allows it to be enabled when CONFIG_BLOCK=n. This leads to many screenlengths of errors, starting with a parse error on the request_queue_t definition. Obviously this wasn't intended for CONFIG_BLOCK=n usage, so just move the option back in to the block. Caught with a randconfig on sh. Signed-off-by: Paul Mundt <lethal@linux-sh.org> -- block/Kconfig | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* | [BLOCK] Get rid of request_queue_t typedefJens Axboe2007-07-249-207/+226
|/ | | | | | | | | Some of the code has been gradually transitioned to using the proper struct request_queue, but there's lots left. So do a full sweet of the kernel and get rid of this typedef and replace its uses with the proper type. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* Merge master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6Linus Torvalds2007-07-223-47/+29
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6: (60 commits) [SCSI] libsas: make ATA functions selectable by a config option [SCSI] bsg: unexport sg v3 helper functions [SCSI] bsg: fix bsg_unregister_queue [SCSI] bsg: make class backlinks [SCSI] 3w-9xxx: add support for 9690SA [SCSI] bsg: fix bsg_register_queue error path [SCSI] ESP: Increase ESP_BUS_TIMEOUT to 275. [SCSI] libsas: fix scr_read/write users and update the libata documentation [SCSI] mpt fusion: update Kconfig help [SCSI] scsi_transport_sas: add destructor for bsg [SCSI] iscsi_tcp: buggered kmalloc() [SCSI] qla2xxx: Update version number to 8.02.00-k2. [SCSI] qla2xxx: Add ISP25XX support. [SCSI] qla2xxx: Use pci_try_set_mwi(). [SCSI] qla2xxx: Use PCI-X/PCI-Express read control interfaces. [SCSI] qla2xxx: Re-factor isp_operations to static structures. [SCSI] qla2xxx: Validate mid-layer 'underflow' during check-condition handling. [SCSI] qla2xxx: Correct setting of 'current' and 'supported' speeds during FDMI registration. [SCSI] qla2xxx: Generalize iIDMA support. [SCSI] qla2xxx: Generalize FW-Interface-2 support. ...
| * [SCSI] bsg: unexport sg v3 helper functionsFUJITA Tomonori2007-07-221-8/+5
| | | | | | | | | | | | | | | | blk_fill_sghdr_rq, blk_unmap_sghdr_rq, and blk_complete_sghdr_rq were exported for bsg, however bsg was changed to support only sg v4. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
| * [SCSI] bsg: fix bsg_unregister_queueFUJITA Tomonori2007-07-211-1/+2
| | | | | | | | | | | | | | | | scsi_sysfs_add_sdev ignores the bsg_register_queue failure, so bsg_unregister_queue must check whether the queue has a bsg device. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
| * [SCSI] bsg: make class backlinksJames Bottomley2007-07-211-4/+17
| | | | | | | | | | | | | | | | | | | | | | | | | | Currently, bsg doesn't make class backlinks (a process whereby you'd get a link to bsg in the device directory in the same way you get one for sg). This is because the bsg device is uninitialised, so the class device has nothing it can attach to. The fix is to make the bsg device point to the cdevice of the entity creating the bsg, necessitating changing the bsg_register_queue() prototype into a form that takes the generic device. Acked-by: FUJITA Tomonori <tomof@acm.org> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
| * [SCSI] bsg: fix bsg_register_queue error pathJames Bottomley2007-07-211-3/+4
| | | | | | | | | | | | | | | | | | | | | | unfortunately, if IS_ERR(class_dev) is true, that means class_dev isn't null and the check in the error leg is pointless ... it's also asking for trouble to request unregistration of a device we haven't actually created (although it works currently). Fix by using explicit gotos and unregisters. Acked-by: FUJITA Tomonori <tomof@acm.org> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
| * [SCSI] bsg: separate bsg and SCSI (so SCSI can be modular)James Bottomley2007-07-192-31/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | This patch moves the bsg registration into SCSI so that bsg no longer has a dependency on the scsi_interface_register API. This can be viewed as a temporary expedient until we can get universal bsg binding sorted out properly. Also use the sdev bus_id as the generic bsg name (to avoid clashes with the queue name). Acked-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Acked-by: Jens Axboe <jens.axboe@oracle.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
* | cfq: Write-only stuff in CFQ data structuresAlexey Dobriyan2007-07-201-11/+0
| | | | | | | | | | | | | | | | There are some leftover bits from the task cooperator patch, that was yanked out again. While it will get reintroduced, no point in having this write-only stuff in the tree. So yank it. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* | cfq: async queue allocation per priorityVasily Tarasov2007-07-201-12/+44
| | | | | | | | | | | | | | | | | | | | | | | | If we have two processes with different ioprio_class, but the same ioprio_data, their async requests will fall into the same queue. I guess such behavior is not expected, because it's not right to put real-time requests and best-effort requests in the same queue. The attached patch fixes the problem by introducing additional *cfqq fields on cfqd, pointing to per-(class,priority) async queues. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* | mm: Remove slab destructors from kmem_cache_create().Paul Mundt2007-07-202-4/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Slab destructors were no longer supported after Christoph's c59def9f222d44bb7e2f0a559f2906191a0862d7 change. They've been BUGs for both slab and slub, and slob never supported them either. This rips out support for the dtor pointer from kmem_cache_create() completely and fixes up every single callsite in the kernel (there were about 224, not including the slab allocator definitions themselves, or the documentation references). Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* | some kmalloc/memset ->kzalloc (tree wide)Yoann Padioleau2007-07-191-2/+1
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Transform some calls to kmalloc/memset to a single kzalloc (or kcalloc). Here is a short excerpt of the semantic patch performing this transformation: @@ type T2; expression x; identifier f,fld; expression E; expression E1,E2; expression e1,e2,e3,y; statement S; @@ x = - kmalloc + kzalloc (E1,E2) ... when != \(x->fld=E;\|y=f(...,x,...);\|f(...,x,...);\|x=E;\|while(...) S\|for(e1;e2;e3) S\) - memset((T2)x,0,E1); @@ expression E1,E2,E3; @@ - kzalloc(E1 * E2,E3) + kcalloc(E1,E2,E3) [akpm@linux-foundation.org: get kcalloc args the right way around] Signed-off-by: Yoann Padioleau <padator@wanadoo.fr> Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Acked-by: Russell King <rmk@arm.linux.org.uk> Cc: Bryan Wu <bryan.wu@analog.com> Acked-by: Jiri Slaby <jirislaby@gmail.com> Cc: Dave Airlie <airlied@linux.ie> Acked-by: Roland Dreier <rolandd@cisco.com> Cc: Jiri Kosina <jkosina@suse.cz> Acked-by: Dmitry Torokhov <dtor@mail.ru> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Mauro Carvalho Chehab <mchehab@infradead.org> Acked-by: Pierre Ossman <drzeus-list@drzeus.cx> Cc: Jeff Garzik <jeff@garzik.org> Cc: "David S. Miller" <davem@davemloft.net> Acked-by: Greg KH <greg@kroah.com> Cc: James Bottomley <James.Bottomley@steeleye.com> Cc: "Antonino A. Daplas" <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge branch 'bsg' of git://git.kernel.dk/data/git/linux-2.6-blockLinus Torvalds2007-07-172-97/+83
|\ | | | | | | | | | | | | | | | | | | | | | | | | * 'bsg' of git://git.kernel.dk/data/git/linux-2.6-block: bsg: fix missing space in version print Don't define empty struct bsg_class_device if !CONFIG_BLK_DEV_BSG bsg: Kconfig updates bsg: minor cleanup bsg: device hash table cleanup bsg: fix initialization error handling bugs bsg: mark FUJITA Tomonori as bsg maintainer bsg: convert to dynamic major bsg: address various review comments
| * bsg: fix missing space in version printJens Axboe2007-07-171-1/+1
| | | | | | | | | | | | | | Tomo introduced a bug in his commit, removing the space between "driver" and "version" in the init printk. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
| * bsg: Kconfig updatesFUJITA Tomonori2007-07-171-4/+9
| | | | | | | | | | | | | | | | | | - add the detailed explanation. - remove 'default y'. - make 'EXPERIMENTAL' keyword visible to the user in menu. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
| * bsg: minor cleanupFUJITA Tomonori2007-07-171-3/+5
| | | | | | | | | | | | | | | | - fix MODULE_DESCRIPTION typo. - unify MODULE_DESCRIPTION and bsg_version. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
| * bsg: device hash table cleanupFUJITA Tomonori2007-07-171-8/+4
| | | | | | | | | | | | | | | | - kill unused bsg_list_idx macro. - add bsg_dev_idx_hash() that returns an appropriate hlist_head. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
| * bsg: fix initialization error handling bugsFUJITA Tomonori2007-07-171-20/+18
| | | | | | | | | | | | | | | | | | | | This fixes the following bugs and cleans up the initialization code: - cdev_del is missing. - unregister_chrdev_region should be used instead of unregister_chrdev. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
| * bsg: convert to dynamic majorJens Axboe2007-07-171-13/+12
| | | | | | | | | | | | | | 240 was hardcoded, that was clearly a dumb mistake. Convert bsg to use alloc_chrdev_region() to retrieve a dynamic major. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
| * bsg: address various review commentsJens Axboe2007-07-171-58/+44
| | | | | | | | | | | | | | This address most of the comments made by Andrew. The two remaining are conversion to idr, and dynamic major. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* | unregister_blkdev(): return voidAkinobu Mita2007-07-171-6/+1
| | | | | | | | | | | | | | | | | | | | Put WARN_ON and fixed all callers of unregister_blkdev(). Now we can make unregister_blkdev return void. Cc: Jens Axboe <jens.axboe@oracle.com> Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | unregister_blkdev(): do WARN_ON on failureAkinobu Mita2007-07-171-2/+3
| | | | | | | | | | | | | | | | | | | | When unregister_blkdev() has failed, something wrong happened. This patch adds WARN_ON to notify of such badness. Cc: Jens Axboe <jens.axboe@oracle.com> Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | Slab allocators: Replace explicit zeroing with __GFP_ZEROChristoph Lameter2007-07-176-21/+18
|/ | | | | | | | | | | | | kmalloc_node() and kmem_cache_alloc_node() were not available in a zeroing variant in the past. But with __GFP_ZERO it is possible now to do zeroing while allocating. Use __GFP_ZERO to remove the explicit clearing of memory via memset whereever we can. Signed-off-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Make BLK_DEV_BSG depend strictly on SCSI=yLinus Torvalds2007-07-161-1/+1
| | | | | | | | | | | | | The SCSI code can be compiled modular, but BLK_DEV_BSG currently cannot, and depends on the SCSI layer. So make sure that it depends on the SCSI layer being compiled in, not just available as a module. Noticed by Jeff Garzik and S.Çağlar Onur. Cc: Jeff Garzik <jeff@garzik.org> Cc: Jens Axboe <jens.axboe@oracle.com> Cc: S.Çağlar Onur <caglar@pardus.org.tr> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Fix new generic block device SG compileLinus Torvalds2007-07-161-1/+1
| | | | | | | | | | | We had a merge issue with the "dentry" field going away from the kobject, and being replaced by a sysfs_dirent field (named "sd") instead. That broke the BSG compile. Cc: Jens Axboe <jens.axboe@oracle.com> Cc: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: James Bottomley <James.Bottomley@SteelEye.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* bsg: Kconfig updatesFUJITA Tomonori2007-07-161-1/+2
| | | | | | | | | | | This updates bsg entry in Kconfig: - bsg supports sg v4 - bsg depends on SCSI - it might be better to mark it experimental for a while Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* bsg: add SCSI transport-level request supportFUJITA Tomonori2007-07-161-6/+21
| | | | | | | | | | | This enables bsg to handle SCSI transport-level request like SAS management protocol (SMP). - add BSG_SUB_PROTOCOL_{SCSI_CMD, SCSI_TMF, SCSI_TRANSPORT} definitions. - SCSI transport-level requests skip blk_verify_command(). Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* bsg: add bidi supportFUJITA Tomonori2007-07-161-25/+49
| | | | | | | bsg uses the rq->next_rq pointer for a bidi request. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* add a struct request pointer to the request structureFUJITA Tomonori2007-07-161-0/+1
| | | | | | | | | | This adds a struct request pointer to the request structure for the second data phase (bidi for now). A request queue supporting bidi requests sets QUEUE_FLAG_BIDI. This prevents sending bidi requests to a non-bidi queue. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* bsg: fix the deadlock on discarding done commandsFUJITA Tomonori2007-07-161-0/+1
| | | | | | | | The previous commit introduced a deadlock in discarding commands, because we forget to unlock the bd spinlock. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* bsg: fix a blocking read bugFUJITA Tomonori2007-07-161-61/+23
| | | | | | | | | | This patch fixes a bug that read() returns ENODATA even with a blocking file descriptor when there are no commands pending. This also includes some cleanups. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* bsg: minor bug fixesFUJITA Tomonori2007-07-161-1/+3
| | | | | | | | | | | | This fixes the following minor issues: - add EXPORT_SYMBOL_GPL for bsg_register_queue and bsg_unregister_queue. - shut up gcc warnings Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Jens Axboe <axboe@nelson.home.kernel.dk>
* improve bsg device allocationFUJITA Tomonori2007-07-161-8/+41
| | | | | | | | | | | | | | | | | | This patch addresses on two issues on bsg device allocation. - the current maxium number of bsg devices is 256. It's too small if we allocate bsg devices to all SCSI devices, transport entities, etc. This increses the maxium number to 32768 (taken from the sg driver). - SCSI devices are dynamically added and removed. Currently, bsg can't handle it well since bsd_device->minor is simply increased. This is dependent on the patchset that I posted yesterday: http://marc.info/?l=linux-scsi&m=117440208726755&w=2 Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* bind bsg to all SCSI devicesFUJITA Tomonori2007-07-162-15/+52
| | | | | | | | | | | | | This patch binds bsg to all SCSI devices (their request queues) like the current sg driver does. We can send SCSI commands to non disk and cdrom scsi devices like OSD via bsg. This patch removes bsg_register_queue from blk_register_queue so bsg devices aren't bound to non SCSI block devices. If they want bsg, I'll send a patch to do that. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* bsg: bind bsg to request_queue instead of gendiskFUJITA Tomonori2007-07-162-22/+19
| | | | | | | | | This patch binds bsg devices to request_queue instead of gendisk. Any objects (like transport entities) can define own request_handler and create own bsg device. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* bsg: add a request_queue argument to scsi_cmd_ioctl()FUJITA Tomonori2007-07-162-8/+4
| | | | | | | | | | | | bsg uses scsi_cmd_ioctl() for some SCSI/sg ioctl commands. scsi_cmd_ioctl() gets a request queue from a gendisk arguement. This prevents bsg being bound to SCSI devices that don't have a gendisk (like OSD). This adds a request_queue argument to scsi_cmd_ioctl(). The SCSI/sg ioctl commands doesn't use a gendisk so it's safe for any SCSI devices to use scsi_cmd_ioctl(). Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* bsg: simplify __bsg_alloc_command failpathFUJITA Tomonori2007-07-161-3/+2
| | | | | Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* bsg: add cheasy error checks for sysfs stuffJens Axboe2007-07-161-1/+10
| | | | Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* Add queue resizing supportJens Axboe2007-07-161-64/+32
| | | | | | | | | | Just get rid of the preallocated command map, use the slab cache to get/free commands instead. Original patch from FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>, changed by me to not use a mempool. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* bsg: silence a bogus gcc warningJens Axboe2007-07-161-1/+1
| | | | Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* bsg: style cleanupJens Axboe2007-07-161-2/+2
| | | | Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
generated by cgit v1.1 at 2024-12-26 19:51:54 +0000