From a773187e37fa5c3bcd92ffda9085707df34f903a Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Wed, 9 Feb 2022 09:28:27 +0100 Subject: [PATCH] scsi: dm: Remove WRITE_SAME support There are no more end-users of REQ_OP_WRITE_SAME left, so we can start deleting it. Link: https://lore.kernel.org/r/20220209082828.2629273-7-hch@lst.de Reviewed-by: Mike Snitzer Signed-off-by: Christoph Hellwig Signed-off-by: Martin K. Petersen --- drivers/md/dm-core.h | 1 - drivers/md/dm-crypt.c | 1 - drivers/md/dm-ebs-target.c | 1 - drivers/md/dm-io.c | 22 ++-------------------- drivers/md/dm-linear.c | 1 - drivers/md/dm-mpath.c | 1 - drivers/md/dm-rq.c | 3 --- drivers/md/dm-stripe.c | 4 +--- drivers/md/dm-table.c | 29 ----------------------------- drivers/md/dm-zone.c | 4 ---- drivers/md/dm.c | 15 --------------- include/linux/device-mapper.h | 6 ------ 12 files changed, 3 insertions(+), 85 deletions(-) diff --git a/drivers/md/dm-core.h b/drivers/md/dm-core.h index b855fef..219407a 100644 --- a/drivers/md/dm-core.h +++ b/drivers/md/dm-core.h @@ -141,7 +141,6 @@ struct mapped_device { #define DMF_EMULATE_ZONE_APPEND 9 void disable_discard(struct mapped_device *md); -void disable_write_same(struct mapped_device *md); void disable_write_zeroes(struct mapped_device *md); static inline sector_t dm_get_size(struct mapped_device *md) diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c index d4ae315..4727b720 100644 --- a/drivers/md/dm-crypt.c +++ b/drivers/md/dm-crypt.c @@ -2006,7 +2006,6 @@ static bool kcryptd_crypt_write_inline(struct crypt_config *cc, */ switch (bio_op(ctx->bio_in)) { case REQ_OP_WRITE: - case REQ_OP_WRITE_SAME: case REQ_OP_WRITE_ZEROES: return true; default: diff --git a/drivers/md/dm-ebs-target.c b/drivers/md/dm-ebs-target.c index 7ce5d50..0221fa6 100644 --- a/drivers/md/dm-ebs-target.c +++ b/drivers/md/dm-ebs-target.c @@ -335,7 +335,6 @@ static int ebs_ctr(struct dm_target *ti, unsigned int argc, char **argv) ti->num_flush_bios = 1; ti->num_discard_bios = 1; ti->num_secure_erase_bios = 0; - ti->num_write_same_bios = 0; ti->num_write_zeroes_bios = 0; return 0; bad: diff --git a/drivers/md/dm-io.c b/drivers/md/dm-io.c index 2d3cda0..82d4316 100644 --- a/drivers/md/dm-io.c +++ b/drivers/md/dm-io.c @@ -304,7 +304,6 @@ static void do_region(int op, int op_flags, unsigned region, unsigned num_bvecs; sector_t remaining = where->count; struct request_queue *q = bdev_get_queue(where->bdev); - unsigned short logical_block_size = queue_logical_block_size(q); sector_t num_sectors; unsigned int special_cmd_max_sectors; @@ -315,10 +314,8 @@ static void do_region(int op, int op_flags, unsigned region, special_cmd_max_sectors = q->limits.max_discard_sectors; else if (op == REQ_OP_WRITE_ZEROES) special_cmd_max_sectors = q->limits.max_write_zeroes_sectors; - else if (op == REQ_OP_WRITE_SAME) - special_cmd_max_sectors = q->limits.max_write_same_sectors; - if ((op == REQ_OP_DISCARD || op == REQ_OP_WRITE_ZEROES || - op == REQ_OP_WRITE_SAME) && special_cmd_max_sectors == 0) { + if ((op == REQ_OP_DISCARD || op == REQ_OP_WRITE_ZEROES) && + special_cmd_max_sectors == 0) { atomic_inc(&io->count); dec_count(io, region, BLK_STS_NOTSUPP); return; @@ -337,9 +334,6 @@ static void do_region(int op, int op_flags, unsigned region, case REQ_OP_WRITE_ZEROES: num_bvecs = 0; break; - case REQ_OP_WRITE_SAME: - num_bvecs = 1; - break; default: num_bvecs = bio_max_segs(dm_sector_div_up(remaining, (PAGE_SIZE >> SECTOR_SHIFT))); @@ -356,18 +350,6 @@ static void do_region(int op, int op_flags, unsigned region, num_sectors = min_t(sector_t, special_cmd_max_sectors, remaining); bio->bi_iter.bi_size = num_sectors << SECTOR_SHIFT; remaining -= num_sectors; - } else if (op == REQ_OP_WRITE_SAME) { - /* - * WRITE SAME only uses a single page. - */ - dp->get_page(dp, &page, &len, &offset); - bio_add_page(bio, page, logical_block_size, offset); - num_sectors = min_t(sector_t, special_cmd_max_sectors, remaining); - bio->bi_iter.bi_size = num_sectors << SECTOR_SHIFT; - - offset = 0; - remaining -= num_sectors; - dp->next_page(dp); } else while (remaining) { /* * Try and add as many pages as possible. diff --git a/drivers/md/dm-linear.c b/drivers/md/dm-linear.c index 1b97a11..76b486e 100644 --- a/drivers/md/dm-linear.c +++ b/drivers/md/dm-linear.c @@ -60,7 +60,6 @@ static int linear_ctr(struct dm_target *ti, unsigned int argc, char **argv) ti->num_flush_bios = 1; ti->num_discard_bios = 1; ti->num_secure_erase_bios = 1; - ti->num_write_same_bios = 1; ti->num_write_zeroes_bios = 1; ti->private = lc; return 0; diff --git a/drivers/md/dm-mpath.c b/drivers/md/dm-mpath.c index f4719b6..9ab9718 100644 --- a/drivers/md/dm-mpath.c +++ b/drivers/md/dm-mpath.c @@ -1252,7 +1252,6 @@ static int multipath_ctr(struct dm_target *ti, unsigned argc, char **argv) ti->num_flush_bios = 1; ti->num_discard_bios = 1; - ti->num_write_same_bios = 1; ti->num_write_zeroes_bios = 1; if (m->queue_mode == DM_TYPE_BIO_BASED) ti->per_io_data_size = multipath_per_bio_data_size(); diff --git a/drivers/md/dm-rq.c b/drivers/md/dm-rq.c index 579ab61..3907950 100644 --- a/drivers/md/dm-rq.c +++ b/drivers/md/dm-rq.c @@ -217,9 +217,6 @@ static void dm_done(struct request *clone, blk_status_t error, bool mapped) if (req_op(clone) == REQ_OP_DISCARD && !clone->q->limits.max_discard_sectors) disable_discard(tio->md); - else if (req_op(clone) == REQ_OP_WRITE_SAME && - !clone->q->limits.max_write_same_sectors) - disable_write_same(tio->md); else if (req_op(clone) == REQ_OP_WRITE_ZEROES && !clone->q->limits.max_write_zeroes_sectors) disable_write_zeroes(tio->md); diff --git a/drivers/md/dm-stripe.c b/drivers/md/dm-stripe.c index e566115..c81d331 100644 --- a/drivers/md/dm-stripe.c +++ b/drivers/md/dm-stripe.c @@ -157,7 +157,6 @@ static int stripe_ctr(struct dm_target *ti, unsigned int argc, char **argv) ti->num_flush_bios = stripes; ti->num_discard_bios = stripes; ti->num_secure_erase_bios = stripes; - ti->num_write_same_bios = stripes; ti->num_write_zeroes_bios = stripes; sc->chunk_size = chunk_size; @@ -284,8 +283,7 @@ static int stripe_map(struct dm_target *ti, struct bio *bio) } if (unlikely(bio_op(bio) == REQ_OP_DISCARD) || unlikely(bio_op(bio) == REQ_OP_SECURE_ERASE) || - unlikely(bio_op(bio) == REQ_OP_WRITE_ZEROES) || - unlikely(bio_op(bio) == REQ_OP_WRITE_SAME)) { + unlikely(bio_op(bio) == REQ_OP_WRITE_ZEROES)) { target_bio_nr = dm_bio_get_target_bio_nr(bio); BUG_ON(target_bio_nr >= sc->stripes); return stripe_map_range(sc, bio, target_bio_nr); diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c index e43096c..88ab986 100644 --- a/drivers/md/dm-table.c +++ b/drivers/md/dm-table.c @@ -1822,33 +1822,6 @@ static int device_is_not_random(struct dm_target *ti, struct dm_dev *dev, return !blk_queue_add_random(q); } -static int device_not_write_same_capable(struct dm_target *ti, struct dm_dev *dev, - sector_t start, sector_t len, void *data) -{ - struct request_queue *q = bdev_get_queue(dev->bdev); - - return !q->limits.max_write_same_sectors; -} - -static bool dm_table_supports_write_same(struct dm_table *t) -{ - struct dm_target *ti; - unsigned i; - - for (i = 0; i < dm_table_get_num_targets(t); i++) { - ti = dm_table_get_target(t, i); - - if (!ti->num_write_same_bios) - return false; - - if (!ti->type->iterate_devices || - ti->type->iterate_devices(ti, device_not_write_same_capable, NULL)) - return false; - } - - return true; -} - static int device_not_write_zeroes_capable(struct dm_target *ti, struct dm_dev *dev, sector_t start, sector_t len, void *data) { @@ -2027,8 +2000,6 @@ int dm_table_set_restrictions(struct dm_table *t, struct request_queue *q, else blk_queue_flag_set(QUEUE_FLAG_NONROT, q); - if (!dm_table_supports_write_same(t)) - q->limits.max_write_same_sectors = 0; if (!dm_table_supports_write_zeroes(t)) q->limits.max_write_zeroes_sectors = 0; diff --git a/drivers/md/dm-zone.c b/drivers/md/dm-zone.c index 6d82a34..c1ca9be 100644 --- a/drivers/md/dm-zone.c +++ b/drivers/md/dm-zone.c @@ -130,7 +130,6 @@ bool dm_is_zone_write(struct mapped_device *md, struct bio *bio) switch (bio_op(bio)) { case REQ_OP_WRITE_ZEROES: - case REQ_OP_WRITE_SAME: case REQ_OP_WRITE: return !op_is_flush(bio->bi_opf) && bio_sectors(bio); default: @@ -390,7 +389,6 @@ static bool dm_zone_map_bio_begin(struct mapped_device *md, case REQ_OP_ZONE_FINISH: return true; case REQ_OP_WRITE_ZEROES: - case REQ_OP_WRITE_SAME: case REQ_OP_WRITE: /* Writes must be aligned to the zone write pointer */ if ((clone->bi_iter.bi_sector & (zsectors - 1)) != zwp_offset) @@ -446,7 +444,6 @@ static blk_status_t dm_zone_map_bio_end(struct mapped_device *md, blk_queue_zone_sectors(md->queue)); return BLK_STS_OK; case REQ_OP_WRITE_ZEROES: - case REQ_OP_WRITE_SAME: case REQ_OP_WRITE: WRITE_ONCE(md->zwp_offset[zno], zwp_offset + nr_sectors); return BLK_STS_OK; @@ -503,7 +500,6 @@ static bool dm_need_zone_wp_tracking(struct bio *orig_bio) return false; switch (bio_op(orig_bio)) { case REQ_OP_WRITE_ZEROES: - case REQ_OP_WRITE_SAME: case REQ_OP_WRITE: case REQ_OP_ZONE_RESET: case REQ_OP_ZONE_FINISH: diff --git a/drivers/md/dm.c b/drivers/md/dm.c index c0ae808..79e273924 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -855,14 +855,6 @@ void disable_discard(struct mapped_device *md) blk_queue_flag_clear(QUEUE_FLAG_DISCARD, md->queue); } -void disable_write_same(struct mapped_device *md) -{ - struct queue_limits *limits = dm_get_queue_limits(md); - - /* device doesn't really support WRITE SAME, disable it */ - limits->max_write_same_sectors = 0; -} - void disable_write_zeroes(struct mapped_device *md) { struct queue_limits *limits = dm_get_queue_limits(md); @@ -889,9 +881,6 @@ static void clone_endio(struct bio *bio) if (bio_op(bio) == REQ_OP_DISCARD && !q->limits.max_discard_sectors) disable_discard(md); - else if (bio_op(bio) == REQ_OP_WRITE_SAME && - !q->limits.max_write_same_sectors) - disable_write_same(md); else if (bio_op(bio) == REQ_OP_WRITE_ZEROES && !q->limits.max_write_zeroes_sectors) disable_write_zeroes(md); @@ -1370,7 +1359,6 @@ static bool is_abnormal_io(struct bio *bio) switch (bio_op(bio)) { case REQ_OP_DISCARD: case REQ_OP_SECURE_ERASE: - case REQ_OP_WRITE_SAME: case REQ_OP_WRITE_ZEROES: r = true; break; @@ -1392,9 +1380,6 @@ static bool __process_abnormal_io(struct clone_info *ci, struct dm_target *ti, case REQ_OP_SECURE_ERASE: num_bios = ti->num_secure_erase_bios; break; - case REQ_OP_WRITE_SAME: - num_bios = ti->num_write_same_bios; - break; case REQ_OP_WRITE_ZEROES: num_bios = ti->num_write_zeroes_bios; break; diff --git a/include/linux/device-mapper.h b/include/linux/device-mapper.h index b26fecf..721db99 100644 --- a/include/linux/device-mapper.h +++ b/include/linux/device-mapper.h @@ -317,12 +317,6 @@ struct dm_target { unsigned num_secure_erase_bios; /* - * The number of WRITE SAME bios that will be submitted to the target. - * The bio number can be accessed with dm_bio_get_target_bio_nr. - */ - unsigned num_write_same_bios; - - /* * The number of WRITE ZEROES bios that will be submitted to the target. * The bio number can be accessed with dm_bio_get_target_bio_nr. */ -- 2.7.4