From: Sarthak Kukreti <sarthakkukreti@chromium.org>
To: dm-devel@redhat.com, linux-block@vger.kernel.org,
linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-fsdevel@vger.kernel.org
Cc: Jens Axboe <axboe@kernel.dk>,
"Michael S. Tsirkin" <mst@redhat.com>,
Jason Wang <jasowang@redhat.com>,
Stefan Hajnoczi <stefanha@redhat.com>,
Alasdair Kergon <agk@redhat.com>,
Mike Snitzer <snitzer@kernel.org>,
Christoph Hellwig <hch@infradead.org>,
Brian Foster <bfoster@redhat.com>, Theodore Ts'o <tytso@mit.edu>,
Andreas Dilger <adilger.kernel@dilger.ca>,
Bart Van Assche <bvanassche@google.com>,
"Darrick J. Wong" <djwong@kernel.org>
Subject: [PATCH v7 3/5] dm: Add block provisioning support
Date: Thu, 18 May 2023 15:33:24 -0700 [thread overview]
Message-ID: <20230518223326.18744-4-sarthakkukreti@chromium.org> (raw)
In-Reply-To: <20230518223326.18744-1-sarthakkukreti@chromium.org>
Add block provisioning support for device-mapper targets.
dm-crypt, dm-snap and dm-linear will, by default, passthrough
REQ_OP_PROVISION requests to the underlying device, if
supported.
Signed-off-by: Sarthak Kukreti <sarthakkukreti@chromium.org>
---
drivers/md/dm-crypt.c | 4 +++-
drivers/md/dm-linear.c | 1 +
drivers/md/dm-snap.c | 7 +++++++
drivers/md/dm-table.c | 23 +++++++++++++++++++++++
drivers/md/dm.c | 6 ++++++
include/linux/device-mapper.h | 17 +++++++++++++++++
6 files changed, 57 insertions(+), 1 deletion(-)
diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c
index 8b47b913ee83..5a7c475ce6fc 100644
--- a/drivers/md/dm-crypt.c
+++ b/drivers/md/dm-crypt.c
@@ -3336,6 +3336,8 @@ static int crypt_ctr(struct dm_target *ti, unsigned int argc, char **argv)
cc->tag_pool_max_sectors <<= cc->sector_shift;
}
+ ti->num_provision_bios = 1;
+
ret = -ENOMEM;
cc->io_queue = alloc_workqueue("kcryptd_io/%s", WQ_MEM_RECLAIM, 1, devname);
if (!cc->io_queue) {
@@ -3390,7 +3392,7 @@ static int crypt_map(struct dm_target *ti, struct bio *bio)
* - for REQ_OP_DISCARD caller must use flush if IO ordering matters
*/
if (unlikely(bio->bi_opf & REQ_PREFLUSH ||
- bio_op(bio) == REQ_OP_DISCARD)) {
+ bio_op(bio) == REQ_OP_DISCARD || bio_op(bio) == REQ_OP_PROVISION)) {
bio_set_dev(bio, cc->dev->bdev);
if (bio_sectors(bio))
bio->bi_iter.bi_sector = cc->start +
diff --git a/drivers/md/dm-linear.c b/drivers/md/dm-linear.c
index f4448d520ee9..74ee27ca551a 100644
--- a/drivers/md/dm-linear.c
+++ b/drivers/md/dm-linear.c
@@ -62,6 +62,7 @@ static int linear_ctr(struct dm_target *ti, unsigned int argc, char **argv)
ti->num_discard_bios = 1;
ti->num_secure_erase_bios = 1;
ti->num_write_zeroes_bios = 1;
+ ti->num_provision_bios = 1;
ti->private = lc;
return 0;
diff --git a/drivers/md/dm-snap.c b/drivers/md/dm-snap.c
index 9c49f53760d0..0dfda50ac4e0 100644
--- a/drivers/md/dm-snap.c
+++ b/drivers/md/dm-snap.c
@@ -1358,6 +1358,7 @@ static int snapshot_ctr(struct dm_target *ti, unsigned int argc, char **argv)
if (s->discard_zeroes_cow)
ti->num_discard_bios = (s->discard_passdown_origin ? 2 : 1);
ti->per_io_data_size = sizeof(struct dm_snap_tracked_chunk);
+ ti->num_provision_bios = 1;
/* Add snapshot to the list of snapshots for this origin */
/* Exceptions aren't triggered till snapshot_resume() is called */
@@ -2003,6 +2004,11 @@ static int snapshot_map(struct dm_target *ti, struct bio *bio)
/* If the block is already remapped - use that, else remap it */
e = dm_lookup_exception(&s->complete, chunk);
if (e) {
+ if (unlikely(bio_op(bio) == REQ_OP_PROVISION)) {
+ bio_endio(bio);
+ r = DM_MAPIO_SUBMITTED;
+ goto out_unlock;
+ }
remap_exception(s, e, bio, chunk);
if (unlikely(bio_op(bio) == REQ_OP_DISCARD) &&
io_overlaps_chunk(s, bio)) {
@@ -2413,6 +2419,7 @@ static void snapshot_io_hints(struct dm_target *ti, struct queue_limits *limits)
/* All discards are split on chunk_size boundary */
limits->discard_granularity = snap->store->chunk_size;
limits->max_discard_sectors = snap->store->chunk_size;
+ limits->max_provision_sectors = snap->store->chunk_size;
up_read(&_origins_lock);
}
diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c
index 1398f1d6e83e..4b2998c1e1dc 100644
--- a/drivers/md/dm-table.c
+++ b/drivers/md/dm-table.c
@@ -1845,6 +1845,26 @@ static bool dm_table_supports_write_zeroes(struct dm_table *t)
return true;
}
+static int device_provision_capable(struct dm_target *ti, struct dm_dev *dev,
+ sector_t start, sector_t len, void *data)
+{
+ return bdev_max_provision_sectors(dev->bdev);
+}
+
+static bool dm_table_supports_provision(struct dm_table *t)
+{
+ for (unsigned int i = 0; i < t->num_targets; i++) {
+ struct dm_target *ti = dm_table_get_target(t, i);
+
+ if (ti->provision_supported ||
+ (ti->type->iterate_devices &&
+ ti->type->iterate_devices(ti, device_provision_capable, NULL)))
+ return true;
+ }
+
+ return false;
+}
+
static int device_not_nowait_capable(struct dm_target *ti, struct dm_dev *dev,
sector_t start, sector_t len, void *data)
{
@@ -1978,6 +1998,9 @@ int dm_table_set_restrictions(struct dm_table *t, struct request_queue *q,
if (!dm_table_supports_write_zeroes(t))
q->limits.max_write_zeroes_sectors = 0;
+ if (!dm_table_supports_provision(t))
+ q->limits.max_provision_sectors = 0;
+
dm_table_verify_integrity(t);
/*
diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index 3b694ba3a106..9b94121b8d38 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -1609,6 +1609,7 @@ static bool is_abnormal_io(struct bio *bio)
case REQ_OP_DISCARD:
case REQ_OP_SECURE_ERASE:
case REQ_OP_WRITE_ZEROES:
+ case REQ_OP_PROVISION:
return true;
default:
break;
@@ -1641,6 +1642,11 @@ static blk_status_t __process_abnormal_io(struct clone_info *ci,
if (ti->max_write_zeroes_granularity)
max_granularity = limits->max_write_zeroes_sectors;
break;
+ case REQ_OP_PROVISION:
+ num_bios = ti->num_provision_bios;
+ if (ti->max_provision_granularity)
+ max_granularity = limits->max_provision_sectors;
+ break;
default:
break;
}
diff --git a/include/linux/device-mapper.h b/include/linux/device-mapper.h
index a52d2b9a6846..9981378457d2 100644
--- a/include/linux/device-mapper.h
+++ b/include/linux/device-mapper.h
@@ -334,6 +334,12 @@ struct dm_target {
*/
unsigned int num_write_zeroes_bios;
+ /*
+ * The number of PROVISION bios that will be submitted to the target.
+ * The bio number can be accessed with dm_bio_get_target_bio_nr.
+ */
+ unsigned int num_provision_bios;
+
/*
* The minimum number of extra bytes allocated in each io for the
* target to use.
@@ -358,6 +364,11 @@ struct dm_target {
*/
bool discards_supported:1;
+ /* Set if this target needs to receive provision requests regardless of
+ * whether or not its underlying devices have support.
+ */
+ bool provision_supported:1;
+
/*
* Set if this target requires that discards be split on
* 'max_discard_sectors' boundaries.
@@ -376,6 +387,12 @@ struct dm_target {
*/
bool max_write_zeroes_granularity:1;
+ /*
+ * Set if this target requires that provisions be split on
+ * 'max_provision_sectors' boundaries.
+ */
+ bool max_provision_granularity:1;
+
/*
* Set if we need to limit the number of in-flight bios when swapping.
*/
--
2.40.1.698.g37aff9b760-goog
next prev parent reply other threads:[~2023-05-18 22:34 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-18 22:33 [PATCH v7 0/5] Introduce provisioning primitives Sarthak Kukreti
2023-05-18 22:33 ` [PATCH v7 1/5] block: Don't invalidate pagecache for invalid falloc modes Sarthak Kukreti
2023-05-19 4:09 ` Christoph Hellwig
2023-05-19 15:17 ` Darrick J. Wong
2023-05-18 22:33 ` [PATCH v7 2/5] block: Introduce provisioning primitives Sarthak Kukreti
2023-05-19 4:18 ` Christoph Hellwig
2023-06-09 20:00 ` Mike Snitzer
2023-05-18 22:33 ` Sarthak Kukreti [this message]
2023-05-18 22:33 ` [PATCH v7 4/5] dm-thin: Add REQ_OP_PROVISION support Sarthak Kukreti
2023-05-19 15:23 ` Mike Snitzer
2023-06-08 21:24 ` Mike Snitzer
2023-06-09 0:28 ` Mike Snitzer
2023-05-18 22:33 ` [PATCH v7 5/5] loop: Add support for provision requests Sarthak Kukreti
2023-05-22 16:37 ` [dm-devel] " Darrick J. Wong
2023-05-22 22:09 ` Sarthak Kukreti
2023-05-23 1:22 ` Darrick J. Wong
2023-10-07 1:29 ` Sarthak Kukreti
2023-05-19 4:09 ` [PATCH v7 0/5] Introduce provisioning primitives Christoph Hellwig
2023-05-19 14:41 ` Mike Snitzer
2023-05-19 23:07 ` Dave Chinner
2023-05-22 18:27 ` Mike Snitzer
2023-05-23 14:05 ` Brian Foster
2023-05-23 15:26 ` Mike Snitzer
2023-05-24 0:40 ` Dave Chinner
2023-05-24 20:02 ` Mike Snitzer
2023-05-25 11:39 ` Dave Chinner
2023-05-25 16:00 ` Mike Snitzer
2023-05-25 22:47 ` Sarthak Kukreti
2023-05-26 1:36 ` Dave Chinner
2023-05-26 2:35 ` Sarthak Kukreti
2023-05-26 15:56 ` Brian Foster
2023-05-25 16:19 ` Brian Foster
2023-05-26 9:37 ` Dave Chinner
2023-05-26 15:47 ` Brian Foster
[not found] ` <CAJ0trDbspRaDKzTzTjFdPHdB9n0Q9unfu1cEk8giTWoNu3jP8g@mail.gmail.com>
2023-05-26 23:45 ` Dave Chinner
[not found] ` <CAJ0trDZJQwvAzngZLBJ1hB0XkQ1HRHQOdNQNTw9nK-U5i-0bLA@mail.gmail.com>
2023-05-30 14:02 ` Mike Snitzer
[not found] ` <CAJ0trDaUOevfiEpXasOESrLHTCcr=oz28ywJU+s+YOiuh7iWow@mail.gmail.com>
2023-05-30 15:28 ` Mike Snitzer
2023-06-02 18:44 ` Sarthak Kukreti
2023-06-02 21:50 ` Mike Snitzer
2023-06-03 0:52 ` Dave Chinner
2023-06-03 15:57 ` Mike Snitzer
2023-06-05 21:14 ` Sarthak Kukreti
2023-06-07 2:15 ` Dave Chinner
2023-06-07 23:27 ` Mike Snitzer
2023-06-09 20:31 ` Mike Snitzer
2023-06-09 21:54 ` Dave Chinner
2023-10-07 1:30 ` Sarthak Kukreti
2023-06-07 2:01 ` Dave Chinner
2023-06-07 23:50 ` Mike Snitzer
2023-06-09 3:32 ` Dave Chinner
2023-06-08 2:03 ` Martin K. Petersen
2023-06-09 0:10 ` Dave Chinner
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20230518223326.18744-4-sarthakkukreti@chromium.org \
--to=sarthakkukreti@chromium.org \
--cc=adilger.kernel@dilger.ca \
--cc=agk@redhat.com \
--cc=axboe@kernel.dk \
--cc=bfoster@redhat.com \
--cc=bvanassche@google.com \
--cc=djwong@kernel.org \
--cc=dm-devel@redhat.com \
--cc=hch@infradead.org \
--cc=jasowang@redhat.com \
--cc=linux-block@vger.kernel.org \
--cc=linux-ext4@vger.kernel.org \
--cc=linux-fsdevel@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mst@redhat.com \
--cc=snitzer@kernel.org \
--cc=stefanha@redhat.com \
--cc=tytso@mit.edu \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).