kernel/linux.git/drivers/block/aoe, branch v2.6.32

aoe: prevent cache aliases

2009-12-02T00:32:20+00:00

Prevent the AoE block driver from creating cache aliases of page cache pages on machines with virtually indexed caches. Building kernels on an AT91SAM9G20 board without this patch fails with segmentation faults after a couple of passes. Signed-off-by: Peter Horton Cc: "Ed L. Cashin" Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

const: make block_device_operations const

2009-09-22T14:17:25+00:00

Signed-off-by: Alexey Dobriyan Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

Driver-Core: extend devnode callbacks to provide permissions

2009-09-19T19:50:38+00:00

This allows subsytems to provide devtmpfs with non-default permissions for the device node. Instead of the default mode of 0600, null, zero, random, urandom, full, tty, ptmx now have a mode of 0666, which allows non-privileged processes to access standard device nodes in case no other userspace process applies the expected permissions. This also fixes a wrong assignment in pktcdvd and a checkpatch.pl complain. Signed-off-by: Kay Sievers Signed-off-by: Greg Kroah-Hartman

Merge branch 'for-2.6.32' of git://git.kernel.dk/linux-2.6-block

2009-09-15T00:55:15+00:00

* 'for-2.6.32' of git://git.kernel.dk/linux-2.6-block: (29 commits) block: use blkdev_issue_discard in blk_ioctl_discard Make DISCARD_BARRIER and DISCARD_NOBARRIER writes instead of reads block: don't assume device has a request list backing in nr_requests store block: Optimal I/O limit wrapper cfq: choose a new next_req when a request is dispatched Seperate read and write statistics of in_flight requests aoe: end barrier bios with EOPNOTSUPP block: trace bio queueing trial only when it occurs block: enable rq CPU completion affinity by default cfq: fix the log message after dispatched a request block: use printk_once cciss: memory leak in cciss_init_one() splice: update mtime and atime on files block: make blk_iopoll_prep_sched() follow normal 0/1 return convention cfq-iosched: get rid of must_alloc flag block: use interrupts disabled version of raise_softirq_irqoff() block: fix comment in blk-iopoll.c block: adjust default budget for blk-iopoll block: fix long lines in block/blk-iopoll.c block: add blk-iopoll, a NAPI like approach for block devices ...

aoe: end barrier bios with EOPNOTSUPP

2009-09-14T06:24:52+00:00

BugLink: http://bugzilla.kernel.org/show_bug.cgi?id=13942 Bruno Premont noticed that aoe throws a BUG during umount of an XFS in 2.6.31: [ 5259.349897] aoe: bi_io_vec is NULL [ 5259.349940] ------------[ cut here ]------------ [ 5259.349958] kernel BUG at /usr/src/linux-2.6/drivers/block/aoe/aoeblk.c:177! [ 5259.349990] invalid opcode: 0000 [#1] The bio in question is a barrier. Jens Axboe suggested that such bios need to be recognized and ended with -EOPNOTSUPP by any driver that provides its own ->make_request_fn handler and does not handle barriers. In testing the changes below eliminate the BUG. (Better would be real barrier support, something that Ed says he'll add for later in the .32 cycle. For now, this at least gets rid of a bug with crashing on an empty barrier. Jens) Signed-off-by: Ed L. Cashin Signed-off-by: Jens Axboe

writeback: add name to backing_dev_info

2009-09-11T07:20:26+00:00

This enables us to track who does what and print info. Its main use is catching dirty inodes on the default_backing_dev_info, so we can fix that up. Signed-off-by: Jens Axboe

aoe: allocate unused request_queue for sysfs

2009-09-09T12:10:18+00:00

Andy Whitcroft reported an oops in aoe triggered by use of an incorrectly initialised request_queue object: [ 2645.959090] kobject '' (ffff880059ca22c0): tried to add an uninitialized object, something is seriously wrong. [ 2645.959104] Pid: 6, comm: events/0 Not tainted 2.6.31-5-generic #24-Ubuntu [ 2645.959107] Call Trace: [ 2645.959139] [] kobject_add+0x5f/0x70 [ 2645.959151] [] blk_register_queue+0x8b/0xf0 [ 2645.959155] [] add_disk+0x8f/0x160 [ 2645.959161] [] aoeblk_gdalloc+0x164/0x1c0 [aoe] The request queue of an aoe device is not used but can be allocated in code that does not sleep. Bruno bisected this regression down to cd43e26f071524647e660706b784ebcbefbd2e44 block: Expose stacked device queues in sysfs "This seems to generate /sys/block/$device/queue and its contents for everyone who is using queues, not just for those queues that have a non-NULL queue->request_fn." Addresses http://bugs.launchpad.net/bugs/410198 Addresses http://bugzilla.kernel.org/show_bug.cgi?id=13942 Note that embedding a queue inside another object has always been an illegal construct, since the queues are reference counted and must persist until the last reference is dropped. So aoe was always buggy in this respect (Jens). Signed-off-by: Ed Cashin Cc: Andy Whitcroft Cc: "Rafael J. Wysocki" Cc: Bruno Premont Cc: Martin K. Petersen Cc: Andrew Morton Signed-off-by: Jens Axboe

Driver Core: aoe: add nodename for aoe devices

2009-06-16T04:30:26+00:00

This adds support to the AOE core to report the proper device name to userspace for the AOE devices. Signed-off-by: Kay Sievers Signed-off-by: Jan Blunck Signed-off-by: Greg Kroah-Hartman

aoe: Remove superfluous clearing of skb fields in new_skb().

2009-05-28T00:09:44+00:00

This code uses alloc_skb() which clears them out for us. Signed-off-by: David S. Miller

aoe: WIN_* -> ATA_CMD_*

2009-04-01T19:42:24+00:00

* Use ATA_CMD_* defines instead of WIN_* ones. * Include directly instead of through . Cc: Ed L. Cashin Signed-off-by: Bartlomiej Zolnierkiewicz