Repository files (latest commit first)

Filename	Latest commit message	Latest commit date
Douglas Gilbert d15156138d block SG_IO: add SG_FLAG_Q_AT_HEAD flag ... After the SG_IO ioctl was copied into the block layer and later into the bsg driver, subtle differences emerged. One difference is the way injected commands are queued through the block layer (i.e. this is not SCSI device queueing nor SATA NCQ). Summarizing: - SG_IO on block layer device: blk_exec*(at_head=false) - sg device SG_IO: at_head=true - bsg device SG_IO: at_head=true Some time ago Boaz Harrosh introduced a sg v4 flag called BSG_FLAG_Q_AT_TAIL to override the bsg driver default. A recent patch titled: "sg: add SG_FLAG_Q_AT_TAIL flag" allowed the sg driver default to be overridden. This patch allows a SG_IO ioctl sent to a block layer device to have its default overridden. ChangeLog: - introduce SG_FLAG_Q_AT_HEAD flag in sg.h to cause commands that are injected via a block layer device SG_IO ioctl to set at_head=true - make comments clearer about queueing in sg.h since the header is used both by the sg device and block layer device implementations of the SG_IO ioctl. - introduce BSG_FLAG_Q_AT_HEAD in bsg.h for compatibility (it does nothing) and update comments. Signed-off-by: Douglas Gilbert <dgilbert@interlog.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: Jens Axboe <axboe@fb.com>		2014-07-01 10:48:05 -06:00
..
partitions	block/partitions/efi.c: kerneldoc fixing	2014-07-01 10:40:05 -06:00
bio-integrity.c	bio-integrity: add "bip_max_vcnt" into struct bio_integrity_payload	2014-07-01 10:36:47 -06:00
bio.c	block: add support for limiting gaps in SG lists	2014-06-24 16:22:24 -06:00
blk-cgroup.c	Revert "block: add __init to blkcg_policy_register"	2014-06-22 16:34:11 -06:00
blk-cgroup.h	Revert "block: add __init to blkcg_policy_register"	2014-06-22 16:34:11 -06:00
blk-core.c	blk-mq: decouble blk-mq freezing from generic bypassing	2014-07-01 10:31:13 -06:00
blk-exec.c	block: blk-exec.c: Cleaning up local variable address returnd	2014-06-08 19:51:31 -06:00
blk-flush.c	block: remove elv_abort_queue and blk_abort_flushes	2014-06-11 15:31:21 -06:00
blk-integrity.c	bio-integrity: Convert to bvec_iter	2013-11-23 22:33:50 -08:00
blk-ioc.c	block: Substitute rcu_access_pointer() for rcu_dereference_raw()	2014-02-18 12:21:26 -08:00
blk-iopoll.c	Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip into next	2014-06-03 12:57:53 -07:00
blk-lib.c	block/blk-lib.c: make __blkdev_issue_zeroout static	2014-05-26 17:39:09 -06:00
blk-map.c	block: remove struct request buffer member	2014-04-15 14:03:02 -06:00
blk-merge.c	block: add support for limiting gaps in SG lists	2014-06-24 16:22:24 -06:00
blk-mq-cpu.c	blk-mq: add file comments and update copyright notices	2014-05-28 10:15:41 -06:00
blk-mq-cpumap.c	blk-mq: add file comments and update copyright notices	2014-05-28 10:15:41 -06:00
blk-mq-sysfs.c	blk-mq: blk_mq_unregister_hctx() can be static	2014-05-30 10:31:13 -06:00
blk-mq-tag.c	blk-mq: bitmap tag: fix races in bt_get() function	2014-06-17 22:13:08 -07:00
blk-mq-tag.h	blk-mq: bitmap tag: fix races on shared ::wake_index fields	2014-06-17 22:12:35 -07:00
blk-mq.c	blk-mq: use percpu_ref for mq usage count	2014-07-01 10:34:38 -06:00
blk-mq.h	blk-mq: decouble blk-mq freezing from generic bypassing	2014-07-01 10:31:13 -06:00
blk-settings.c	block: ensure that bio_add_page() always accepts a page for an empty bio	2014-06-10 12:53:56 -06:00
blk-softirq.c	block: fix regression with block enabled tagging	2014-04-09 21:54:06 -06:00
blk-sysfs.c	block, blk-mq: draining can't be skipped even if bypass_depth was non-zero	2014-07-01 10:29:17 -06:00
blk-tag.c	block: Reserve only one queue tag for sync IO if only 3 tags are available	2013-06-28 21:32:27 +02:00
blk-throttle.c	Merge branch 'for-3.16' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup	2014-06-09 15:03:33 -07:00
blk-timeout.c	block: ensure that the timer is always added	2014-05-30 15:41:39 -06:00
blk.h	block: remove elv_abort_queue and blk_abort_flushes	2014-06-11 15:31:21 -06:00
bounce.c	mm: convert some level-less printks to pr_*	2014-06-06 16:08:18 -07:00
bsg-lib.c
bsg.c	block: add blk_rq_set_block_pc()	2014-06-06 07:57:37 -06:00
cfq-iosched.c	Merge branch 'for-3.16' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup	2014-06-09 15:03:33 -07:00
cmdline-parser.c	block: remove unrelated header files and export symbol	2014-01-21 20:18:26 -08:00
compat_ioctl.c	block: fix BLKSECTGET ioctl when max_sectors is greater than USHRT_MAX	2014-07-01 10:43:07 -06:00
deadline-iosched.c	block: Stop abusing csd.list for fifo_time	2014-02-24 14:46:32 -08:00
elevator.c	Revert "block: add __init to elv_register"	2014-06-22 16:34:11 -06:00
genhd.c	block: Convert kmalloc_node(...GFP_ZERO...) to kzalloc_node(...)	2013-09-11 13:22:03 -06:00
ioctl.c	block: fix BLKSECTGET ioctl when max_sectors is greater than USHRT_MAX	2014-07-01 10:43:07 -06:00
ioprio.c	block: move ioprio.c from fs/ to block/	2014-05-19 11:02:18 -06:00
Kconfig	block: change config option name for cmdline partition parsing	2013-09-30 14:31:02 -07:00
Kconfig.iosched
Makefile	block: move mm/bounce.c to block/	2014-05-19 20:01:52 -06:00
noop-iosched.c	elevator: Fix a race in elevator switching	2013-07-03 13:25:24 +02:00
partition-generic.c
scsi_ioctl.c	block SG_IO: add SG_FLAG_Q_AT_HEAD flag	2014-07-01 10:48:05 -06:00