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c49c06e496
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Vivek Goyal c49c06e496 blkio-throttle: Fix possible multiplication overflow in iops calculations 
o User can specify max iops value of 32bit (UINT_MAX), through cgroup
  interface. If a user has specified say 4294967294 (UNIT_MAX  - 2), then
  on 32bit platform, following multiplication can overflow.

  io_allowed = (tg->iops[rw] * jiffy_elapsed_rnd)

o Explicitly cast the multiplication to 64bit and then perform division and
  then check whether result is still great then UNINT_MAX.

Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
2010-10-01 21:16:42 +02:00
..
blk-barrier.c block: set up rq->rq_disk properly for flush requests 2010-08-07 18:52:41 +02:00
blk-cgroup.c blkio-throttle: limit max iops value to UINT_MAX 2010-10-01 21:16:41 +02:00
blk-cgroup.h blkio-throttle: limit max iops value to UINT_MAX 2010-10-01 21:16:41 +02:00
blk-core.c blkio: Core implementation of throttle policy 2010-09-16 08:42:52 +02:00
blk-exec.c block: Prevent hang_check firing during long I/O 2010-09-24 15:52:09 +02:00
blk-integrity.c block/scsi: Provide a limit on the number of integrity segments 2010-09-10 20:50:10 +02:00
blk-ioc.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
blk-iopoll.c tree-wide: fix assorted typos all over the place 2009-12-04 15:39:55 +01:00
blk-lib.c block: add secure discard 2010-08-12 08:43:30 -07:00
blk-map.c block: fix an address space warning in blk-map.c 2010-09-15 13:08:27 +02:00
blk-merge.c block/scsi: Provide a limit on the number of integrity segments 2010-09-10 20:50:10 +02:00
blk-settings.c block: set the bounce_pfn to the actual DMA limit rather than to max memory 2010-10-01 14:45:27 +02:00
blk-softirq.c generic-ipi: remove CSD_FLAG_WAIT 2009-02-25 14:13:44 +01:00
blk-sysfs.c block/scsi: Provide a limit on the number of integrity segments 2010-09-10 20:50:10 +02:00
blk-tag.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
blk-throttle.c blkio-throttle: Fix possible multiplication overflow in iops calculations 2010-10-01 21:16:42 +02:00
blk-timeout.c block: ensure jiffies wrap is handled correctly in blk_rq_timed_out_timer 2010-04-21 17:42:08 +02:00
blk.h block/scsi: Provide a limit on the number of integrity segments 2010-09-10 20:50:10 +02:00
bsg.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
cfq-iosched.c blkio: Recalculate the throttled bio dispatch time upon throttle limit change 2010-10-01 14:49:49 +02:00
cfq.h blk-cgroup: Prepare the base for supporting more than one IO control policies 2010-09-16 08:42:04 +02:00
compat_ioctl.c block: add secure discard 2010-08-12 08:43:30 -07:00
deadline-iosched.c block: convert to pos and nr_sectors accessors 2009-05-11 09:50:54 +02:00
elevator.c block: add secure discard 2010-08-12 08:43:30 -07:00
genhd.c block: Fix race during disk initialization 2010-09-16 20:36:36 +02:00
ioctl.c block, partition: add partition_meta_info to hd_struct 2010-09-15 16:13:18 +02:00
Kconfig blkio: Core implementation of throttle policy 2010-09-16 08:42:52 +02:00
Kconfig.iosched blk-cgroup: config options re-arrangement 2010-04-26 19:27:56 +02:00
Makefile blkio: Core implementation of throttle policy 2010-09-16 08:42:52 +02:00
noop-iosched.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
scsi_ioctl.c block/scsi_ioctl.c: quiet sparse noise 2009-11-04 09:10:33 +01:00