[PATCH v3 2/5] dm: Support I/O priority for dm_io()
From: Hongyu Jin
Date: Mon Dec 11 2023 - 04:01:01 EST
From: Hongyu Jin <hongyu.jin@xxxxxxxxxx>
Add ioprio field in struct dm_io_region, by this field
specific I/O priority when call dm_io().
Co-developed-by: Yibin Ding <yibin.ding@xxxxxxxxxx>
Signed-off-by: Yibin Ding <yibin.ding@xxxxxxxxxx>
Signed-off-by: Hongyu Jin <hongyu.jin@xxxxxxxxxx>
---
drivers/md/dm-bufio.c | 3 +++
drivers/md/dm-integrity.c | 5 +++++
drivers/md/dm-io.c | 1 +
drivers/md/dm-log.c | 1 +
drivers/md/dm-raid1.c | 2 ++
drivers/md/dm-snap-persistent.c | 1 +
drivers/md/dm-writecache.c | 4 ++++
include/linux/dm-io.h | 2 ++
8 files changed, 19 insertions(+)
diff --git a/drivers/md/dm-bufio.c b/drivers/md/dm-bufio.c
index 62eb27639c9b..7f82262aed54 100644
--- a/drivers/md/dm-bufio.c
+++ b/drivers/md/dm-bufio.c
@@ -1269,6 +1269,7 @@ static void use_dmio(struct dm_buffer *b, enum req_op op, sector_t sector,
.bdev = b->c->bdev,
.sector = sector,
.count = n_sectors,
+ .ioprio = IOPRIO_DEFAULT,
};
if (b->data_mode != DATA_MODE_VMALLOC) {
@@ -2125,6 +2126,7 @@ int dm_bufio_issue_flush(struct dm_bufio_client *c)
.bdev = c->bdev,
.sector = 0,
.count = 0,
+ .ioprio = IOPRIO_DEFAULT,
};
if (WARN_ON_ONCE(dm_bufio_in_request()))
@@ -2149,6 +2151,7 @@ int dm_bufio_issue_discard(struct dm_bufio_client *c, sector_t block, sector_t c
.bdev = c->bdev,
.sector = block_to_sector(c, block),
.count = block_to_sector(c, count),
+ .ioprio = IOPRIO_DEFAULT,
};
if (WARN_ON_ONCE(dm_bufio_in_request()))
diff --git a/drivers/md/dm-integrity.c b/drivers/md/dm-integrity.c
index e85c688fd91e..7cba183abdce 100644
--- a/drivers/md/dm-integrity.c
+++ b/drivers/md/dm-integrity.c
@@ -543,6 +543,7 @@ static int sync_rw_sb(struct dm_integrity_c *ic, blk_opf_t opf)
io_loc.bdev = ic->meta_dev ? ic->meta_dev->bdev : ic->dev->bdev;
io_loc.sector = ic->start;
io_loc.count = SB_SECTORS;
+ io_loc.ioprio = IOPRIO_DEFAULT;
if (op == REQ_OP_WRITE) {
sb_set_version(ic);
@@ -1070,6 +1071,7 @@ static void rw_journal_sectors(struct dm_integrity_c *ic, blk_opf_t opf,
io_loc.bdev = ic->meta_dev ? ic->meta_dev->bdev : ic->dev->bdev;
io_loc.sector = ic->start + SB_SECTORS + sector;
io_loc.count = n_sectors;
+ io_loc.ioprio = IOPRIO_DEFAULT;
r = dm_io(&io_req, 1, &io_loc, NULL);
if (unlikely(r)) {
@@ -1187,6 +1189,7 @@ static void copy_from_journal(struct dm_integrity_c *ic, unsigned int section, u
io_loc.bdev = ic->dev->bdev;
io_loc.sector = target;
io_loc.count = n_sectors;
+ io_loc.ioprio = IOPRIO_DEFAULT;
r = dm_io(&io_req, 1, &io_loc, NULL);
if (unlikely(r)) {
@@ -1515,6 +1518,7 @@ static void dm_integrity_flush_buffers(struct dm_integrity_c *ic, bool flush_dat
fr.io_reg.bdev = ic->dev->bdev,
fr.io_reg.sector = 0,
fr.io_reg.count = 0,
+ fr.io_reg.ioprio = IOPRIO_DEFAULT,
fr.ic = ic;
init_completion(&fr.comp);
r = dm_io(&fr.io_req, 1, &fr.io_reg, NULL);
@@ -2738,6 +2742,7 @@ static void integrity_recalc(struct work_struct *w)
io_loc.bdev = ic->dev->bdev;
io_loc.sector = get_data_sector(ic, area, offset);
io_loc.count = n_sectors;
+ io_loc.ioprio = IOPRIO_DEFAULT;
r = dm_io(&io_req, 1, &io_loc, NULL);
if (unlikely(r)) {
diff --git a/drivers/md/dm-io.c b/drivers/md/dm-io.c
index f053ce245814..b40f0a432981 100644
--- a/drivers/md/dm-io.c
+++ b/drivers/md/dm-io.c
@@ -354,6 +354,7 @@ static void do_region(const blk_opf_t opf, unsigned int region,
&io->client->bios);
bio->bi_iter.bi_sector = where->sector + (where->count - remaining);
bio->bi_end_io = endio;
+ bio->bi_ioprio = where->ioprio;
store_io_and_region_in_bio(bio, io, region);
if (op == REQ_OP_DISCARD || op == REQ_OP_WRITE_ZEROES) {
diff --git a/drivers/md/dm-log.c b/drivers/md/dm-log.c
index f9f84236dfcd..e0dacdcd94f1 100644
--- a/drivers/md/dm-log.c
+++ b/drivers/md/dm-log.c
@@ -309,6 +309,7 @@ static int flush_header(struct log_c *lc)
.bdev = lc->header_location.bdev,
.sector = 0,
.count = 0,
+ .ioprio = IOPRIO_DEFAULT,
};
lc->io_req.bi_opf = REQ_OP_WRITE | REQ_PREFLUSH;
diff --git a/drivers/md/dm-raid1.c b/drivers/md/dm-raid1.c
index ddcb2bc4a617..2de9b1377de3 100644
--- a/drivers/md/dm-raid1.c
+++ b/drivers/md/dm-raid1.c
@@ -275,6 +275,7 @@ static int mirror_flush(struct dm_target *ti)
io[i].bdev = m->dev->bdev;
io[i].sector = 0;
io[i].count = 0;
+ io[i].ioprio = IOPRIO_DEFAULT;
}
error_bits = -1;
@@ -475,6 +476,7 @@ static void map_region(struct dm_io_region *io, struct mirror *m,
io->bdev = m->dev->bdev;
io->sector = map_sector(m, bio);
io->count = bio_sectors(bio);
+ io->ioprio = bio_prio(bio);
}
static void hold_bio(struct mirror_set *ms, struct bio *bio)
diff --git a/drivers/md/dm-snap-persistent.c b/drivers/md/dm-snap-persistent.c
index 15649921f2a9..4aa70b71f1da 100644
--- a/drivers/md/dm-snap-persistent.c
+++ b/drivers/md/dm-snap-persistent.c
@@ -236,6 +236,7 @@ static int chunk_io(struct pstore *ps, void *area, chunk_t chunk, blk_opf_t opf,
.bdev = dm_snap_cow(ps->store->snap)->bdev,
.sector = ps->store->chunk_size * chunk,
.count = ps->store->chunk_size,
+ .ioprio = IOPRIO_DEFAULT,
};
struct dm_io_request io_req = {
.bi_opf = opf,
diff --git a/drivers/md/dm-writecache.c b/drivers/md/dm-writecache.c
index 074cb785eafc..135d1268246f 100644
--- a/drivers/md/dm-writecache.c
+++ b/drivers/md/dm-writecache.c
@@ -515,6 +515,7 @@ static void ssd_commit_flushed(struct dm_writecache *wc, bool wait_for_ios)
region.bdev = wc->ssd_dev->bdev;
region.sector = (sector_t)i * (BITMAP_GRANULARITY >> SECTOR_SHIFT);
region.count = (sector_t)(j - i) * (BITMAP_GRANULARITY >> SECTOR_SHIFT);
+ region.ioprio = IOPRIO_DEFAULT;
if (unlikely(region.sector >= wc->metadata_sectors))
break;
@@ -555,6 +556,7 @@ static void ssd_commit_superblock(struct dm_writecache *wc)
region.bdev = wc->ssd_dev->bdev;
region.sector = 0;
region.count = max(4096U, wc->block_size) >> SECTOR_SHIFT;
+ region.ioprio = IOPRIO_DEFAULT;
if (unlikely(region.sector + region.count > wc->metadata_sectors))
region.count = wc->metadata_sectors - region.sector;
@@ -590,6 +592,7 @@ static void writecache_disk_flush(struct dm_writecache *wc, struct dm_dev *dev)
region.bdev = dev->bdev;
region.sector = 0;
region.count = 0;
+ region.ioprio = IOPRIO_DEFAULT;
req.bi_opf = REQ_OP_WRITE | REQ_PREFLUSH;
req.mem.type = DM_IO_KMEM;
req.mem.ptr.addr = NULL;
@@ -984,6 +987,7 @@ static int writecache_read_metadata(struct dm_writecache *wc, sector_t n_sectors
region.bdev = wc->ssd_dev->bdev;
region.sector = wc->start_sector;
region.count = n_sectors;
+ region.ioprio = IOPRIO_DEFAULT;
req.bi_opf = REQ_OP_READ | REQ_SYNC;
req.mem.type = DM_IO_VMA;
req.mem.ptr.vma = (char *)wc->memory_map;
diff --git a/include/linux/dm-io.h b/include/linux/dm-io.h
index 7595142f3fc5..227ee6d77c70 100644
--- a/include/linux/dm-io.h
+++ b/include/linux/dm-io.h
@@ -20,6 +20,8 @@ struct dm_io_region {
struct block_device *bdev;
sector_t sector;
sector_t count; /* If this is zero the region is ignored. */
+ /* Set it to IOPRIO_DEFAULT if you don't know what value to set */
+ unsigned short ioprio;
};
struct page_list {
--
2.34.1