Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
drivers/md/dm-core.h | 1 -
drivers/md/dm-io.c | 21 +--------------------
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.c | 23 -----------------------
include/linux/device-mapper.h | 6 ------
9 files changed, 2 insertions(+), 87 deletions(-)
diff --git a/drivers/md/dm-core.h b/drivers/md/dm-core.h
index fea5bd52ada8..d661801d72e7 100644
--- a/drivers/md/dm-core.h
+++ b/drivers/md/dm-core.h
@@ -131,7 +131,6 @@ struct mapped_device {
void dm_init_md_queue(struct mapped_device *md);
void dm_init_normal_md_queue(struct mapped_device *md);
int md_in_flight(struct mapped_device *md);
-void disable_write_same(struct mapped_device *md);
void disable_write_zeroes(struct mapped_device *md);
static inline struct completion *dm_get_completion_from_kobject(struct kobject *kobj)
diff --git a/drivers/md/dm-io.c b/drivers/md/dm-io.c
index 3702e502466d..105e68dabd3e 100644
--- a/drivers/md/dm-io.c
+++ b/drivers/md/dm-io.c
@@ -303,7 +303,6 @@ 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 uninitialized_var(special_cmd_max_sectors);
@@ -314,10 +313,7 @@ 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) &&
+ if ((op == REQ_OP_DISCARD || op == REQ_OP_WRITE_ZEROES) &&
special_cmd_max_sectors == 0) {
dec_count(io, region, -EOPNOTSUPP);
return;
@@ -336,9 +332,6 @@ 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 = min_t(int, BIO_MAX_PAGES,
dm_sector_div_up(remaining, (PAGE_SIZE >> SECTOR_SHIFT)));
@@ -355,18 +348,6 @@ 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 e17fd44ceef5..f928f7e9ee4a 100644
--- a/drivers/md/dm-linear.c
+++ b/drivers/md/dm-linear.c
@@ -58,7 +58,6 @@ 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_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 ab55955ed704..ece53947b99d 100644
--- a/drivers/md/dm-mpath.c
+++ b/drivers/md/dm-mpath.c
@@ -1102,7 +1102,6 @@ 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 e60f1b6845be..6f8dc99685f2 100644
--- a/drivers/md/dm-rq.c
+++ b/drivers/md/dm-rq.c
@@ -299,9 +299,6 @@ static void dm_done(struct request *clone, int error, bool mapped)
}
if (unlikely(r == -EREMOTEIO)) {
- if (req_op(clone) == REQ_OP_WRITE_SAME &&
- !clone->q->limits.max_write_same_sectors)
- disable_write_same(tio->md);
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 5ef49c121d99..cc5a00f2e2de 100644
--- a/drivers/md/dm-stripe.c
+++ b/drivers/md/dm-stripe.c
@@ -168,7 +168,6 @@ 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_write_same_bios = stripes;
ti->num_write_zeroes_bios = stripes;
sc->chunk_size = chunk_size;
@@ -294,8 +293,7 @@ static int stripe_map(struct dm_target *ti, struct bio *bio)
return DM_MAPIO_REMAPPED;
}
if (unlikely(bio_op(bio) == REQ_OP_DISCARD) ||
- 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 958275aca008..8bbc3d57fcc7 100644
--- a/drivers/md/dm-table.c
+++ b/drivers/md/dm-table.c
@@ -1490,33 +1490,6 @@ static bool dm_table_all_devices_attribute(struct dm_table *t,
return true;
}
-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 && !q->limits.max_write_same_sectors;
-}
-
-static bool dm_table_supports_write_same(struct dm_table *t)
-{
- struct dm_target *ti;
- unsigned i = 0;
-
- while (i < dm_table_get_num_targets(t)) {
- 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)
{
@@ -1610,8 +1583,6 @@ void dm_table_set_restrictions(struct dm_table *t, struct request_queue *q,
else
queue_flag_clear_unlocked(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.c b/drivers/md/dm.c
index 8bf397729bbd..8259aa76839e 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -816,14 +816,6 @@ static void dec_pending(struct dm_io *io, int error)
}
}
-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);
@@ -859,9 +851,6 @@ static void clone_endio(struct bio *bio)
}
if (unlikely(r == -EREMOTEIO)) {
- if (bio_op(bio) == REQ_OP_WRITE_SAME &&
- !bdev_get_queue(bio->bi_bdev)->limits.max_write_same_sectors)
- disable_write_same(md);
if (bio_op(bio) == REQ_OP_WRITE_ZEROES &&
!bdev_get_queue(bio->bi_bdev)->limits.max_write_zeroes_sectors)
disable_write_zeroes(md);
@@ -1209,11 +1198,6 @@ static unsigned get_num_discard_bios(struct dm_target *ti)
return ti->num_discard_bios;
}
-static unsigned get_num_write_same_bios(struct dm_target *ti)
-{
- return ti->num_write_same_bios;
-}
-
static unsigned get_num_write_zeroes_bios(struct dm_target *ti)
{
return ti->num_write_zeroes_bios;
@@ -1268,11 +1252,6 @@ static int __send_discard(struct clone_info *ci)
is_split_required_for_discard);
}
-static int __send_write_same(struct clone_info *ci)
-{
- return __send_changing_extent_only(ci, get_num_write_same_bios, NULL);
-}
-
static int __send_write_zeroes(struct clone_info *ci)
{
return __send_changing_extent_only(ci, get_num_write_zeroes_bios, NULL);
@@ -1290,8 +1269,6 @@ static int __split_and_process_non_flush(struct clone_info *ci)
if (unlikely(bio_op(bio) == REQ_OP_DISCARD))
return __send_discard(ci);
- else if (unlikely(bio_op(bio) == REQ_OP_WRITE_SAME))
- return __send_write_same(ci);
else if (unlikely(bio_op(bio) == REQ_OP_WRITE_ZEROES))
return __send_write_zeroes(ci);
diff --git a/include/linux/device-mapper.h b/include/linux/device-mapper.h
index c7ea33e38fb9..58f451ba9b75 100644
--- a/include/linux/device-mapper.h
+++ b/include/linux/device-mapper.h
@@ -249,12 +249,6 @@ struct dm_target {
unsigned num_discard_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.
*/
--
2.11.0
