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2008-08-29remove blk_register_filter and blk_unregister_filter in gendiskFUJITA Tomonori
This patch remove blk_register_filter and blk_unregister_filter in gendisk, and adds them to sd.c, sr.c. and ide-cd.c The commit abf5439370491dd6fbb4fe1a7939680d2a9bc9d4 moved cmdfilter from gendisk to request_queue. It turned out that in some subsystems multiple gendisks share a single request_queue. So we get: Using physmap partition information Creating 3 MTD partitions on "physmap-flash": 0x00000000-0x01c00000 : "User FS" 0x01c00000-0x01c40000 : "booter" kobject (8511c410): tried to init an initialized object, something is seriously wrong. Call Trace: [<8036644c>] dump_stack+0x8/0x34 [<8021f050>] kobject_init+0x50/0xcc [<8021fa18>] kobject_init_and_add+0x24/0x58 [<8021d20c>] blk_register_filter+0x4c/0x64 [<8021c194>] add_disk+0x78/0xe0 [<8027d14c>] add_mtd_blktrans_dev+0x254/0x278 [<8027c8f0>] blktrans_notify_add+0x40/0x78 [<80279c00>] add_mtd_device+0xd0/0x150 [<8027b090>] add_mtd_partitions+0x568/0x5d8 [<80285458>] physmap_flash_probe+0x2ac/0x334 [<802644f8>] driver_probe_device+0x12c/0x244 [<8026465c>] __driver_attach+0x4c/0x84 [<80263c64>] bus_for_each_dev+0x58/0xac [<802633ec>] bus_add_driver+0xc4/0x24c [<802648e0>] driver_register+0xcc/0x184 [<80100460>] _stext+0x60/0x1bc In the long term, we need to fix such subsystems but we need a quick fix now. This patch add the command filter support to only sd and sr though it might be useful for other SG_IO users (such as cciss). Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Reported-by: Manuel Lauss <mano@roarinelk.homelinux.net> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-08-27block: clean up cmdfilter sysfs interfaceAdel Gadllah
This patch changes the interface of the cmd filter to use a +/- notation like: echo -- +0x02 +0x03 -0x08 If neither + or - is given it defaults to + (allow command). Note: The interface was added in 2.6.17-rc1 and is unused and undocumented so far so it's safe to change it. Reviewed-by: Matthew Wilcox <willy@linux.intel.com> Reviewed-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: jens.axboe@oracle.com Cc: James.Bottomley@hansenpartnership.com Cc: dan.j.williams@intel.com Cc: pjones@redhat.com Cc: viro@zeniv.linux.org.uk Cc: dougg@torque.net Signed-off-by: Adel Gadllah <adel.gadllah@gmail.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-08-27block: rename blk_scsi_cmd_filter to blk_cmd_filterFUJITA Tomonori
Technically, the cmd_filter would be applied to other protocols though it's unlikely to happen. Putting SCSI stuff to request_queue is kinda layer violation. So let's rename it. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-08-27block: move cmdfilter from gendisk to request_queueFUJITA Tomonori
cmd_filter works only for the block layer SG_IO with SCSI block devices. It breaks scsi/sg.c, bsg, and the block layer SG_IO with SCSI character devices (such as st). We hit a kernel crash with them. The problem is that cmd_filter code accesses to gendisk (having struct blk_scsi_cmd_filter) via inode->i_bdev->bd_disk. It works for only SCSI block device files. With character device files, inode->i_bdev leads you to struct cdev. inode->i_bdev->bd_disk->blk_scsi_cmd_filter isn't safe. SCSI ULDs don't expose gendisk; they keep it private. bsg needs to be independent on any protocols. We shouldn't change ULDs to expose their gendisk. This patch moves struct blk_scsi_cmd_filter from gendisk to request_queue, a common object, which eveyone can access to. The user interface doesn't change; users can change the filters via /sys/block/. gendisk has a pointer to request_queue so the cmd_filter code accesses to struct blk_scsi_cmd_filter. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-07-03cmdfilter: extend default read filterAdel Gadllah
This patch adds the commands that the former sg filter allowed for read access to the cmdfilter to keep userspace apps that rely on them working. Signed-off-by: Adel Gadllah <adel.gadllah@gmail.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-07-03allow userspace to modify scsi command filter on per device basisAdel Gadllah
This patch exports the per-gendisk command filter to user space through sysfs, so it can be changed by the system administrator. All users of the old cmd filter have been converted to use the new one. Original patch from Peter Jones. Signed-off-by: Adel Gadllah <adel.gadllah@gmail.com> Signed-off-by: Peter Jones <pjones@redhat.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>