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author | Linus Torvalds <torvalds@linux-foundation.org> | 2015-09-02 13:10:25 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-09-02 13:10:25 -0700 |
commit | 1081230b748de8f03f37f80c53dfa89feda9b8de (patch) | |
tree | 7238d60e01f0843bad8f03b5d84e4220fbba5e76 /drivers/md/dm-thin.c | |
parent | df910390e2db07a76c87f258475f6c96253cee6c (diff) | |
parent | 2ca495ac27d245513c11fed70591b1838250e240 (diff) | |
download | op-kernel-dev-1081230b748de8f03f37f80c53dfa89feda9b8de.zip op-kernel-dev-1081230b748de8f03f37f80c53dfa89feda9b8de.tar.gz |
Merge branch 'for-4.3/core' of git://git.kernel.dk/linux-block
Pull core block updates from Jens Axboe:
"This first core part of the block IO changes contains:
- Cleanup of the bio IO error signaling from Christoph. We used to
rely on the uptodate bit and passing around of an error, now we
store the error in the bio itself.
- Improvement of the above from myself, by shrinking the bio size
down again to fit in two cachelines on x86-64.
- Revert of the max_hw_sectors cap removal from a revision again,
from Jeff Moyer. This caused performance regressions in various
tests. Reinstate the limit, bump it to a more reasonable size
instead.
- Make /sys/block/<dev>/queue/discard_max_bytes writeable, by me.
Most devices have huge trim limits, which can cause nasty latencies
when deleting files. Enable the admin to configure the size down.
We will look into having a more sane default instead of UINT_MAX
sectors.
- Improvement of the SGP gaps logic from Keith Busch.
- Enable the block core to handle arbitrarily sized bios, which
enables a nice simplification of bio_add_page() (which is an IO hot
path). From Kent.
- Improvements to the partition io stats accounting, making it
faster. From Ming Lei.
- Also from Ming Lei, a basic fixup for overflow of the sysfs pending
file in blk-mq, as well as a fix for a blk-mq timeout race
condition.
- Ming Lin has been carrying Kents above mentioned patches forward
for a while, and testing them. Ming also did a few fixes around
that.
- Sasha Levin found and fixed a use-after-free problem introduced by
the bio->bi_error changes from Christoph.
- Small blk cgroup cleanup from Viresh Kumar"
* 'for-4.3/core' of git://git.kernel.dk/linux-block: (26 commits)
blk: Fix bio_io_vec index when checking bvec gaps
block: Replace SG_GAPS with new queue limits mask
block: bump BLK_DEF_MAX_SECTORS to 2560
Revert "block: remove artifical max_hw_sectors cap"
blk-mq: fix race between timeout and freeing request
blk-mq: fix buffer overflow when reading sysfs file of 'pending'
Documentation: update notes in biovecs about arbitrarily sized bios
block: remove bio_get_nr_vecs()
fs: use helper bio_add_page() instead of open coding on bi_io_vec
block: kill merge_bvec_fn() completely
md/raid5: get rid of bio_fits_rdev()
md/raid5: split bio for chunk_aligned_read
block: remove split code in blkdev_issue_{discard,write_same}
btrfs: remove bio splitting and merge_bvec_fn() calls
bcache: remove driver private bio splitting code
block: simplify bio_add_page()
block: make generic_make_request handle arbitrarily sized bios
blk-cgroup: Drop unlikely before IS_ERR(_OR_NULL)
block: don't access bio->bi_error after bio_put()
block: shrink struct bio down to 2 cache lines again
...
Diffstat (limited to 'drivers/md/dm-thin.c')
-rw-r--r-- | drivers/md/dm-thin.c | 72 |
1 files changed, 23 insertions, 49 deletions
diff --git a/drivers/md/dm-thin.c b/drivers/md/dm-thin.c index d2bbe8c..271a662 100644 --- a/drivers/md/dm-thin.c +++ b/drivers/md/dm-thin.c @@ -615,8 +615,10 @@ static void error_bio_list(struct bio_list *bios, int error) { struct bio *bio; - while ((bio = bio_list_pop(bios))) - bio_endio(bio, error); + while ((bio = bio_list_pop(bios))) { + bio->bi_error = error; + bio_endio(bio); + } } static void error_thin_bio_list(struct thin_c *tc, struct bio_list *master, int error) @@ -870,14 +872,14 @@ static void copy_complete(int read_err, unsigned long write_err, void *context) complete_mapping_preparation(m); } -static void overwrite_endio(struct bio *bio, int err) +static void overwrite_endio(struct bio *bio) { struct dm_thin_endio_hook *h = dm_per_bio_data(bio, sizeof(struct dm_thin_endio_hook)); struct dm_thin_new_mapping *m = h->overwrite_mapping; bio->bi_end_io = m->saved_bi_end_io; - m->err = err; + m->err = bio->bi_error; complete_mapping_preparation(m); } @@ -1002,7 +1004,7 @@ static void process_prepared_mapping(struct dm_thin_new_mapping *m) */ if (bio) { inc_remap_and_issue_cell(tc, m->cell, m->data_block); - bio_endio(bio, 0); + bio_endio(bio); } else { inc_all_io_entry(tc->pool, m->cell->holder); remap_and_issue(tc, m->cell->holder, m->data_block); @@ -1032,7 +1034,7 @@ static void process_prepared_discard_fail(struct dm_thin_new_mapping *m) static void process_prepared_discard_success(struct dm_thin_new_mapping *m) { - bio_endio(m->bio, 0); + bio_endio(m->bio); free_discard_mapping(m); } @@ -1046,7 +1048,7 @@ static void process_prepared_discard_no_passdown(struct dm_thin_new_mapping *m) metadata_operation_failed(tc->pool, "dm_thin_remove_range", r); bio_io_error(m->bio); } else - bio_endio(m->bio, 0); + bio_endio(m->bio); cell_defer_no_holder(tc, m->cell); mempool_free(m, tc->pool->mapping_pool); @@ -1117,7 +1119,8 @@ static void process_prepared_discard_passdown(struct dm_thin_new_mapping *m) * Even if r is set, there could be sub discards in flight that we * need to wait for. */ - bio_endio(m->bio, r); + m->bio->bi_error = r; + bio_endio(m->bio); cell_defer_no_holder(tc, m->cell); mempool_free(m, pool->mapping_pool); } @@ -1493,9 +1496,10 @@ static void handle_unserviceable_bio(struct pool *pool, struct bio *bio) { int error = should_error_unserviceable_bio(pool); - if (error) - bio_endio(bio, error); - else + if (error) { + bio->bi_error = error; + bio_endio(bio); + } else retry_on_resume(bio); } @@ -1631,7 +1635,7 @@ static void process_discard_cell_passdown(struct thin_c *tc, struct dm_bio_priso * will prevent completion until the sub range discards have * completed. */ - bio_endio(bio, 0); + bio_endio(bio); } static void process_discard_bio(struct thin_c *tc, struct bio *bio) @@ -1645,7 +1649,7 @@ static void process_discard_bio(struct thin_c *tc, struct bio *bio) /* * The discard covers less than a block. */ - bio_endio(bio, 0); + bio_endio(bio); return; } @@ -1790,7 +1794,7 @@ static void provision_block(struct thin_c *tc, struct bio *bio, dm_block_t block if (bio_data_dir(bio) == READ) { zero_fill_bio(bio); cell_defer_no_holder(tc, cell); - bio_endio(bio, 0); + bio_endio(bio); return; } @@ -1855,7 +1859,7 @@ static void process_cell(struct thin_c *tc, struct dm_bio_prison_cell *cell) } else { zero_fill_bio(bio); - bio_endio(bio, 0); + bio_endio(bio); } } else provision_block(tc, bio, block, cell); @@ -1926,7 +1930,7 @@ static void __process_bio_read_only(struct thin_c *tc, struct bio *bio, } zero_fill_bio(bio); - bio_endio(bio, 0); + bio_endio(bio); break; default: @@ -1951,7 +1955,7 @@ static void process_cell_read_only(struct thin_c *tc, struct dm_bio_prison_cell static void process_bio_success(struct thin_c *tc, struct bio *bio) { - bio_endio(bio, 0); + bio_endio(bio); } static void process_bio_fail(struct thin_c *tc, struct bio *bio) @@ -2600,7 +2604,8 @@ static int thin_bio_map(struct dm_target *ti, struct bio *bio) thin_hook_bio(tc, bio); if (tc->requeue_mode) { - bio_endio(bio, DM_ENDIO_REQUEUE); + bio->bi_error = DM_ENDIO_REQUEUE; + bio_endio(bio); return DM_MAPIO_SUBMITTED; } @@ -3875,20 +3880,6 @@ static int pool_iterate_devices(struct dm_target *ti, return fn(ti, pt->data_dev, 0, ti->len, data); } -static int pool_merge(struct dm_target *ti, struct bvec_merge_data *bvm, - struct bio_vec *biovec, int max_size) -{ - struct pool_c *pt = ti->private; - struct request_queue *q = bdev_get_queue(pt->data_dev->bdev); - - if (!q->merge_bvec_fn) - return max_size; - - bvm->bi_bdev = pt->data_dev->bdev; - - return min(max_size, q->merge_bvec_fn(q, bvm, biovec)); -} - static void pool_io_hints(struct dm_target *ti, struct queue_limits *limits) { struct pool_c *pt = ti->private; @@ -3965,7 +3956,6 @@ static struct target_type pool_target = { .resume = pool_resume, .message = pool_message, .status = pool_status, - .merge = pool_merge, .iterate_devices = pool_iterate_devices, .io_hints = pool_io_hints, }; @@ -4292,21 +4282,6 @@ err: DMEMIT("Error"); } -static int thin_merge(struct dm_target *ti, struct bvec_merge_data *bvm, - struct bio_vec *biovec, int max_size) -{ - struct thin_c *tc = ti->private; - struct request_queue *q = bdev_get_queue(tc->pool_dev->bdev); - - if (!q->merge_bvec_fn) - return max_size; - - bvm->bi_bdev = tc->pool_dev->bdev; - bvm->bi_sector = dm_target_offset(ti, bvm->bi_sector); - - return min(max_size, q->merge_bvec_fn(q, bvm, biovec)); -} - static int thin_iterate_devices(struct dm_target *ti, iterate_devices_callout_fn fn, void *data) { @@ -4350,7 +4325,6 @@ static struct target_type thin_target = { .presuspend = thin_presuspend, .postsuspend = thin_postsuspend, .status = thin_status, - .merge = thin_merge, .iterate_devices = thin_iterate_devices, .io_hints = thin_io_hints, }; |