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2a842acab1
linux/block
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Christoph Hellwig 2a842acab1 block: introduce new block status code type 
Currently we use nornal Linux errno values in the block layer, and while
we accept any error a few have overloaded magic meanings.  This patch
instead introduces a new  blk_status_t value that holds block layer specific
status codes and explicitly explains their meaning.  Helpers to convert from
and to the previous special meanings are provided for now, but I suspect
we want to get rid of them in the long run - those drivers that have a
errno input (e.g. networking) usually get errnos that don't know about
the special block layer overloads, and similarly returning them to userspace
will usually return somethings that strictly speaking isn't correct
for file system operations, but that's left as an exercise for later.

For now the set of errors is a very limited set that closely corresponds
to the previous overloaded errno values, but there is some low hanging
fruite to improve it.

blk_status_t (ab)uses the sparse __bitwise annotations to allow for sparse
typechecking, so that we can easily catch places passing the wrong values.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
2017-06-09 09:27:32 -06:00
..
partitions partitions/msdos: FreeBSD UFS2 file systems are not recognized 2017-05-23 09:16:07 -06:00
badblocks.c
bfq-cgroup.c block, bfq: split bfq-iosched.c into multiple source files 2017-04-19 08:48:24 -06:00
bfq-iosched.c block, bfq: stress that low_latency must be off to get max throughput 2017-05-10 07:39:43 -06:00
bfq-iosched.h bfq: fix compile error if CONFIG_CGROUPS=n 2017-04-20 09:39:12 -06:00
bfq-wf2q.c block, bfq: use pointer entity->sched_data only if set 2017-05-10 07:39:43 -06:00
bio-integrity.c
bio.c Merge branch 'md-next' into md-linus 2017-05-01 14:09:21 -07:00
blk-cgroup.c blkcg: allocate struct blkcg_gq outside request queue spinlock 2017-03-29 11:27:19 -06:00
blk-core.c block: introduce new block status code type 2017-06-09 09:27:32 -06:00
blk-exec.c block: introduce new block status code type 2017-06-09 09:27:32 -06:00
blk-flush.c block: introduce new block status code type 2017-06-09 09:27:32 -06:00
blk-integrity.c block: fix blk_integrity_register to use template's interval_exp if not 0 2017-04-23 12:59:56 -06:00
blk-ioc.c Merge branch 'for-linus' of git://git.kernel.dk/linux-block 2017-03-03 10:53:35 -08:00
blk-lib.c block: remove the discard_zeroes_data flag 2017-04-08 11:25:38 -06:00
blk-map.c sched/headers: Prepare for new header dependencies before moving code to <linux/sched/task_stack.h> 2017-03-02 08:42:36 +01:00
blk-merge.c block: implement splitting of REQ_OP_WRITE_ZEROES bios 2017-04-08 11:25:38 -06:00
blk-mq-cpumap.c
blk-mq-debugfs.c blk-mq-debugfs: Add 'kick' operation 2017-06-01 13:03:00 -06:00
blk-mq-debugfs.h mq-deadline: add debugfs attributes 2017-05-04 08:25:17 -06:00
blk-mq-pci.c blk-mq-pci: Fix two spelling mistakes 2017-03-29 11:09:51 -06:00
blk-mq-sched.c blk-mq: make per-sw-queue bio merge as default .bio_merge 2017-05-26 14:12:04 -06:00
blk-mq-sched.h blk-mq: make per-sw-queue bio merge as default .bio_merge 2017-05-26 14:12:04 -06:00
blk-mq-sysfs.c blk-mq: untangle debugfs and sysfs 2017-05-04 08:24:13 -06:00
blk-mq-tag.c blk-mq: add shallow depth option for blk_mq_get_tag() 2017-04-14 14:06:54 -06:00
blk-mq-tag.h blk-mq-sched: Allocate sched reserved tags as specified in the original queue tagset 2017-03-02 08:56:04 -07:00
blk-mq-virtio.c blk-mq: provide a default queue mapping for virtio device 2017-02-27 20:54:05 +02:00
blk-mq.c block: introduce new block status code type 2017-06-09 09:27:32 -06:00
blk-mq.h blk-mq: move debugfs declarations to a separate header file 2017-05-04 08:23:44 -06:00
blk-settings.c block: remove the discard_zeroes_data flag 2017-04-08 11:25:38 -06:00
blk-softirq.c sched/headers: Prepare for new header dependencies before moving code to <linux/sched/topology.h> 2017-03-02 08:42:26 +01:00
blk-stat.c blk-stat: don't use this_cpu_ptr() in a preemptable section 2017-05-10 07:40:18 -06:00
blk-stat.h blk-stat: kill blk_stat_rq_ddir() 2017-04-21 07:56:23 -06:00
blk-sysfs.c blk-mq: Only register debugfs attributes for blk-mq queues 2017-05-26 07:25:13 -06:00
blk-tag.c blk-mq-sched: add framework for MQ capable IO schedulers 2017-01-17 10:04:20 -07:00
blk-throttle.c blk-throttle: force user to configure all settings for io.low 2017-05-22 14:47:12 -06:00
blk-timeout.c block: remove the errors field from struct request 2017-04-20 12:16:10 -06:00
blk-wbt.c blk-stat: kill blk_stat_rq_ddir() 2017-04-21 07:56:23 -06:00
blk-wbt.h block: Make writeback throttling defaults consistent for SQ devices 2017-04-19 08:49:03 -06:00
blk-zoned.c
blk.h block: Export blk_init_request_from_bio() 2017-04-19 17:38:30 -06:00
bounce.c
bsg-lib.c block: introduce new block status code type 2017-06-09 09:27:32 -06:00
bsg.c block: introduce new block status code type 2017-06-09 09:27:32 -06:00
cfq-iosched.c cfq-iosched: Delete unused function min_vdisktime() 2017-05-30 09:49:44 -06:00
cmdline-parser.c
compat_ioctl.c block: remove the discard_zeroes_data flag 2017-04-08 11:25:38 -06:00
deadline-iosched.c block: enumify ELEVATOR_*_MERGE 2017-02-08 13:43:06 -07:00
elevator.c elevator: remove redundant warnings on IO scheduler switch 2017-05-10 07:40:04 -06:00
genhd.c A reasonably busy cycle for documentation this time around. There is a new 2017-05-02 10:21:17 -07:00
ioctl.c block: remove the discard_zeroes_data flag 2017-04-08 11:25:38 -06:00
ioprio.c block: Optimize ioprio_best() 2017-04-19 17:38:36 -06:00
Kconfig Merge branch 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm 2017-05-12 15:43:10 -07:00
Kconfig.iosched block, bfq: add full hierarchical scheduling and cgroups support 2017-04-19 08:30:26 -06:00
kyber-iosched.c kyber: add debugfs attributes 2017-05-04 08:25:17 -06:00
Makefile block, bfq: split bfq-iosched.c into multiple source files 2017-04-19 08:48:24 -06:00
mq-deadline.c mq-deadline: add debugfs attributes 2017-05-04 08:25:17 -06:00
noop-iosched.c
opal_proto.h block/sed-opal: allocate struct opal_dev dynamically 2017-02-17 12:41:47 -07:00
partition-generic.c block: fix an error code in add_partition() 2017-05-23 08:41:59 -06:00
scsi_ioctl.c scsi: introduce a result field in struct scsi_request 2017-04-20 12:16:10 -06:00
sed-opal.c block: sed-opal: Tone down all the pr_* to debugs 2017-04-07 14:24:16 -06:00
t10-pi.c block: constify struct blk_integrity_profile 2017-03-24 20:34:39 -06:00