[PATCH 6.8 711/715] dm io: Support IO priority

24 Mar 2024

From: Hongyu Jin hongyu.jin@unisoc.com
[ Upstream commit 6e5f0f6383b4896c7e9b943d84b136149d0f45e9 ]
Some IO will dispatch from kworker with different io_context settings
than the submitting task, we may need to specify a priority to avoid
losing priority.
Add IO priority parameter to dm_io() and update all callers.
Co-developed-by: Yibin Ding yibin.ding@unisoc.com
Signed-off-by: Yibin Ding yibin.ding@unisoc.com
Signed-off-by: Hongyu Jin hongyu.jin@unisoc.com
Reviewed-by: Eric Biggers ebiggers@google.com
Reviewed-by: Mikulas Patocka mpatocka@redhat.com
Signed-off-by: Mike Snitzer snitzer@kernel.org
Stable-dep-of: b4d78cfeb304 ("dm-integrity: align the outgoing bio in integrity_recheck")
Signed-off-by: Sasha Levin sashal@kernel.org
---
 drivers/md/dm-bufio.c           |  6 +++---
 drivers/md/dm-integrity.c       | 12 ++++++------
 drivers/md/dm-io.c              | 23 +++++++++++++----------
 drivers/md/dm-kcopyd.c          |  4 ++--
 drivers/md/dm-log.c             |  4 ++--
 drivers/md/dm-raid1.c           |  6 +++---
 drivers/md/dm-snap-persistent.c |  4 ++--
 drivers/md/dm-verity-target.c   |  2 +-
 drivers/md/dm-writecache.c      |  8 ++++----
 include/linux/dm-io.h           |  3 ++-
 10 files changed, 38 insertions(+), 34 deletions(-)

diff --git a/drivers/md/dm-bufio.c b/drivers/md/dm-bufio.c
index 13c65b7e1ed63..f5541b8f6320c 100644
--- a/drivers/md/dm-bufio.c
+++ b/drivers/md/dm-bufio.c
@@ -1315,7 +1315,7 @@ static void use_dmio(struct dm_buffer *b, enum req_op op, sector_t sector,
    	io_req.mem.ptr.vma = (char *)b->data + offset;
    }
-	r = dm_io(&io_req, 1, &region, NULL);
+	r = dm_io(&io_req, 1, &region, NULL, IOPRIO_DEFAULT);
    if (unlikely(r))
    	b->end_io(b, errno_to_blk_status(r));
 }
@@ -2167,7 +2167,7 @@ int dm_bufio_issue_flush(struct dm_bufio_client *c)
    if (WARN_ON_ONCE(dm_bufio_in_request()))
    	return -EINVAL;
-	return dm_io(&io_req, 1, &io_reg, NULL);
+	return dm_io(&io_req, 1, &io_reg, NULL, IOPRIO_DEFAULT);
 }
 EXPORT_SYMBOL_GPL(dm_bufio_issue_flush);
@@ -2191,7 +2191,7 @@ int dm_bufio_issue_discard(struct dm_bufio_client *c, sector_t block, sector_t c
    if (WARN_ON_ONCE(dm_bufio_in_request()))
    	return -EINVAL; /* discards are optional */
-	return dm_io(&io_req, 1, &io_reg, NULL);
+	return dm_io(&io_req, 1, &io_reg, NULL, IOPRIO_DEFAULT);
 }
 EXPORT_SYMBOL_GPL(dm_bufio_issue_discard);
diff --git a/drivers/md/dm-integrity.c b/drivers/md/dm-integrity.c
index f194ce6bfacb5..92bed6ce17931 100644
--- a/drivers/md/dm-integrity.c
+++ b/drivers/md/dm-integrity.c
@@ -555,7 +555,7 @@ static int sync_rw_sb(struct dm_integrity_c *ic, blk_opf_t opf)
    	}
    }
-	r = dm_io(&io_req, 1, &io_loc, NULL);
+	r = dm_io(&io_req, 1, &io_loc, NULL, IOPRIO_DEFAULT);
    if (unlikely(r))
    	return r;
@@ -1073,7 +1073,7 @@ static void rw_journal_sectors(struct dm_integrity_c *ic, blk_opf_t opf,
    io_loc.sector = ic->start + SB_SECTORS + sector;
    io_loc.count = n_sectors;
-	r = dm_io(&io_req, 1, &io_loc, NULL);
+	r = dm_io(&io_req, 1, &io_loc, NULL, IOPRIO_DEFAULT);
    if (unlikely(r)) {
    	dm_integrity_io_error(ic, (opf & REQ_OP_MASK) == REQ_OP_READ ?
    			      "reading journal" : "writing journal", r);
@@ -1190,7 +1190,7 @@ static void copy_from_journal(struct dm_integrity_c *ic, unsigned int section, u
    io_loc.sector = target;
    io_loc.count = n_sectors;
-	r = dm_io(&io_req, 1, &io_loc, NULL);
+	r = dm_io(&io_req, 1, &io_loc, NULL, IOPRIO_DEFAULT);
    if (unlikely(r)) {
    	WARN_ONCE(1, "asynchronous dm_io failed: %d", r);
    	fn(-1UL, data);
@@ -1519,7 +1519,7 @@ static void dm_integrity_flush_buffers(struct dm_integrity_c *ic, bool flush_dat
    	fr.io_reg.count = 0,
    	fr.ic = ic;
    	init_completion(&fr.comp);
-		r = dm_io(&fr.io_req, 1, &fr.io_reg, NULL);
+		r = dm_io(&fr.io_req, 1, &fr.io_reg, NULL, IOPRIO_DEFAULT);
    	BUG_ON(r);
    }
@@ -1727,7 +1727,7 @@ static noinline void integrity_recheck(struct dm_integrity_io *dio, char *checks
    		io_loc.sector = sector;
    		io_loc.count = ic->sectors_per_block;
-			r = dm_io(&io_req, 1, &io_loc, NULL);
+			r = dm_io(&io_req, 1, &io_loc, NULL, IOPRIO_DEFAULT);
    		if (unlikely(r)) {
    			dio->bi_status = errno_to_blk_status(r);
    			goto free_ret;
@@ -2806,7 +2806,7 @@ static void integrity_recalc(struct work_struct *w)
    io_loc.sector = get_data_sector(ic, area, offset);
    io_loc.count = n_sectors;
-	r = dm_io(&io_req, 1, &io_loc, NULL);
+	r = dm_io(&io_req, 1, &io_loc, NULL, IOPRIO_DEFAULT);
    if (unlikely(r)) {
    	dm_integrity_io_error(ic, "reading data", r);
    	goto err;
diff --git a/drivers/md/dm-io.c b/drivers/md/dm-io.c
index f053ce2458147..7409490259d1d 100644
--- a/drivers/md/dm-io.c
+++ b/drivers/md/dm-io.c
@@ -305,7 +305,7 @@ static void km_dp_init(struct dpages *dp, void *data)
  */
 static void do_region(const blk_opf_t opf, unsigned int region,
    	      struct dm_io_region *where, struct dpages *dp,
-		      struct io *io)
+		      struct io *io, unsigned short ioprio)
 {
    struct bio *bio;
    struct page *page;
@@ -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 = ioprio;
    	store_io_and_region_in_bio(bio, io, region);
if (op == REQ_OP_DISCARD || op == REQ_OP_WRITE_ZEROES) {
@@ -383,7 +384,7 @@ static void do_region(const blk_opf_t opf, unsigned int region,
static void dispatch_io(blk_opf_t opf, unsigned int num_regions,
    		struct dm_io_region *where, struct dpages *dp,
-			struct io *io, int sync)
+			struct io *io, int sync, unsigned short ioprio)
 {
    int i;
    struct dpages old_pages = *dp;
@@ -400,7 +401,7 @@ static void dispatch_io(blk_opf_t opf, unsigned int num_regions,
    for (i = 0; i < num_regions; i++) {
    	*dp = old_pages;
    	if (where[i].count || (opf & REQ_PREFLUSH))
-			do_region(opf, i, where + i, dp, io);
+			do_region(opf, i, where + i, dp, io, ioprio);
    }
/*
@@ -425,7 +426,7 @@ static void sync_io_complete(unsigned long error, void *context)
static int sync_io(struct dm_io_client *client, unsigned int num_regions,
    	   struct dm_io_region *where, blk_opf_t opf, struct dpages *dp,
-		   unsigned long *error_bits)
+		   unsigned long *error_bits, unsigned short ioprio)
 {
    struct io *io;
    struct sync_io sio;
@@ -447,7 +448,7 @@ static int sync_io(struct dm_io_client *client, unsigned int num_regions,
    io->vma_invalidate_address = dp->vma_invalidate_address;
    io->vma_invalidate_size = dp->vma_invalidate_size;
-	dispatch_io(opf, num_regions, where, dp, io, 1);
+	dispatch_io(opf, num_regions, where, dp, io, 1, ioprio);
wait_for_completion_io(&sio.wait);
@@ -459,7 +460,8 @@ static int sync_io(struct dm_io_client *client, unsigned int num_regions,
static int async_io(struct dm_io_client *client, unsigned int num_regions,
    	    struct dm_io_region *where, blk_opf_t opf,
-		    struct dpages *dp, io_notify_fn fn, void *context)
+		    struct dpages *dp, io_notify_fn fn, void *context,
+		    unsigned short ioprio)
 {
    struct io *io;
@@ -479,7 +481,7 @@ static int async_io(struct dm_io_client *client, unsigned int num_regions,
    io->vma_invalidate_address = dp->vma_invalidate_address;
    io->vma_invalidate_size = dp->vma_invalidate_size;
-	dispatch_io(opf, num_regions, where, dp, io, 0);
+	dispatch_io(opf, num_regions, where, dp, io, 0, ioprio);
    return 0;
 }
@@ -521,7 +523,8 @@ static int dp_init(struct dm_io_request *io_req, struct dpages *dp,
 }
int dm_io(struct dm_io_request *io_req, unsigned int num_regions,
-	  struct dm_io_region *where, unsigned long *sync_error_bits)
+	  struct dm_io_region *where, unsigned long *sync_error_bits,
+	  unsigned short ioprio)
 {
    int r;
    struct dpages dp;
@@ -532,11 +535,11 @@ int dm_io(struct dm_io_request *io_req, unsigned int num_regions,
if (!io_req->notify.fn)
    	return sync_io(io_req->client, num_regions, where,
-			       io_req->bi_opf, &dp, sync_error_bits);
+			       io_req->bi_opf, &dp, sync_error_bits, ioprio);
return async_io(io_req->client, num_regions, where,
    		io_req->bi_opf, &dp, io_req->notify.fn,
-			io_req->notify.context);
+			io_req->notify.context, ioprio);
 }
 EXPORT_SYMBOL(dm_io);
diff --git a/drivers/md/dm-kcopyd.c b/drivers/md/dm-kcopyd.c
index 36bcfdccae046..6ea75436a433a 100644
--- a/drivers/md/dm-kcopyd.c
+++ b/drivers/md/dm-kcopyd.c
@@ -578,9 +578,9 @@ static int run_io_job(struct kcopyd_job *job)
    io_job_start(job->kc->throttle);
if (job->op == REQ_OP_READ)
-		r = dm_io(&io_req, 1, &job->source, NULL);
+		r = dm_io(&io_req, 1, &job->source, NULL, IOPRIO_DEFAULT);
    else
-		r = dm_io(&io_req, job->num_dests, job->dests, NULL);
+		r = dm_io(&io_req, job->num_dests, job->dests, NULL, IOPRIO_DEFAULT);
return r;
 }
diff --git a/drivers/md/dm-log.c b/drivers/md/dm-log.c
index f9f84236dfcd7..f7f9c2100937b 100644
--- a/drivers/md/dm-log.c
+++ b/drivers/md/dm-log.c
@@ -300,7 +300,7 @@ static int rw_header(struct log_c *lc, enum req_op op)
 {
    lc->io_req.bi_opf = op;
-	return dm_io(&lc->io_req, 1, &lc->header_location, NULL);
+	return dm_io(&lc->io_req, 1, &lc->header_location, NULL, IOPRIO_DEFAULT);
 }
static int flush_header(struct log_c *lc)
@@ -313,7 +313,7 @@ static int flush_header(struct log_c *lc)
lc->io_req.bi_opf = REQ_OP_WRITE | REQ_PREFLUSH;
-	return dm_io(&lc->io_req, 1, &null_location, NULL);
+	return dm_io(&lc->io_req, 1, &null_location, NULL, IOPRIO_DEFAULT);
 }
static int read_header(struct log_c *log)
diff --git a/drivers/md/dm-raid1.c b/drivers/md/dm-raid1.c
index ddcb2bc4a6179..9511dae5b556a 100644
--- a/drivers/md/dm-raid1.c
+++ b/drivers/md/dm-raid1.c
@@ -278,7 +278,7 @@ static int mirror_flush(struct dm_target *ti)
    }
error_bits = -1;
-	dm_io(&io_req, ms->nr_mirrors, io, &error_bits);
+	dm_io(&io_req, ms->nr_mirrors, io, &error_bits, IOPRIO_DEFAULT);
    if (unlikely(error_bits != 0)) {
    	for (i = 0; i < ms->nr_mirrors; i++)
    		if (test_bit(i, &error_bits))
@@ -554,7 +554,7 @@ static void read_async_bio(struct mirror *m, struct bio *bio)
map_region(&io, m, bio);
    bio_set_m(bio, m);
-	BUG_ON(dm_io(&io_req, 1, &io, NULL));
+	BUG_ON(dm_io(&io_req, 1, &io, NULL, IOPRIO_DEFAULT));
 }
static inline int region_in_sync(struct mirror_set *ms, region_t region,
@@ -681,7 +681,7 @@ static void do_write(struct mirror_set *ms, struct bio *bio)
     */
    bio_set_m(bio, get_default_mirror(ms));
-	BUG_ON(dm_io(&io_req, ms->nr_mirrors, io, NULL));
+	BUG_ON(dm_io(&io_req, ms->nr_mirrors, io, NULL, IOPRIO_DEFAULT));
 }
static void do_writes(struct mirror_set *ms, struct bio_list *writes)
diff --git a/drivers/md/dm-snap-persistent.c b/drivers/md/dm-snap-persistent.c
index 15649921f2a9b..568d10842b1f4 100644
--- a/drivers/md/dm-snap-persistent.c
+++ b/drivers/md/dm-snap-persistent.c
@@ -223,7 +223,7 @@ static void do_metadata(struct work_struct *work)
 {
    struct mdata_req *req = container_of(work, struct mdata_req, work);
-	req->result = dm_io(req->io_req, 1, req->where, NULL);
+	req->result = dm_io(req->io_req, 1, req->where, NULL, IOPRIO_DEFAULT);
 }
/*
@@ -247,7 +247,7 @@ static int chunk_io(struct pstore *ps, void *area, chunk_t chunk, blk_opf_t opf,
    struct mdata_req req;
if (!metadata)
-		return dm_io(&io_req, 1, &where, NULL);
+		return dm_io(&io_req, 1, &where, NULL, IOPRIO_DEFAULT);
req.where = &where;
    req.io_req = &io_req;
diff --git a/drivers/md/dm-verity-target.c b/drivers/md/dm-verity-target.c
index 1b591bfa90d5d..abc008bae9020 100644
--- a/drivers/md/dm-verity-target.c
+++ b/drivers/md/dm-verity-target.c
@@ -511,7 +511,7 @@ static noinline int verity_recheck(struct dm_verity *v, struct dm_verity_io *io,
    io_loc.bdev = v->data_dev->bdev;
    io_loc.sector = cur_block << (v->data_dev_block_bits - SECTOR_SHIFT);
    io_loc.count = 1 << (v->data_dev_block_bits - SECTOR_SHIFT);
-	r = dm_io(&io_req, 1, &io_loc, NULL);
+	r = dm_io(&io_req, 1, &io_loc, NULL, IOPRIO_DEFAULT);
    if (unlikely(r))
    	goto free_ret;
diff --git a/drivers/md/dm-writecache.c b/drivers/md/dm-writecache.c
index b463c28c39ad3..01ab141bc51e3 100644
--- a/drivers/md/dm-writecache.c
+++ b/drivers/md/dm-writecache.c
@@ -531,7 +531,7 @@ static void ssd_commit_flushed(struct dm_writecache *wc, bool wait_for_ios)
    	req.notify.context = &endio;
/* writing via async dm-io (implied by notify.fn above) won't return an error */
-		(void) dm_io(&req, 1, &region, NULL);
+		(void) dm_io(&req, 1, &region, NULL, IOPRIO_DEFAULT);
    	i = j;
    }
@@ -568,7 +568,7 @@ static void ssd_commit_superblock(struct dm_writecache *wc)
    req.notify.fn = NULL;
    req.notify.context = NULL;
-	r = dm_io(&req, 1, &region, NULL);
+	r = dm_io(&req, 1, &region, NULL, IOPRIO_DEFAULT);
    if (unlikely(r))
    	writecache_error(wc, r, "error writing superblock");
 }
@@ -596,7 +596,7 @@ static void writecache_disk_flush(struct dm_writecache *wc, struct dm_dev *dev)
    req.client = wc->dm_io;
    req.notify.fn = NULL;
-	r = dm_io(&req, 1, &region, NULL);
+	r = dm_io(&req, 1, &region, NULL, IOPRIO_DEFAULT);
    if (unlikely(r))
    	writecache_error(wc, r, "error flushing metadata: %d", r);
 }
@@ -990,7 +990,7 @@ static int writecache_read_metadata(struct dm_writecache *wc, sector_t n_sectors
    req.client = wc->dm_io;
    req.notify.fn = NULL;
-	return dm_io(&req, 1, &region, NULL);
+	return dm_io(&req, 1, &region, NULL, IOPRIO_DEFAULT);
 }
static void writecache_resume(struct dm_target *ti)
diff --git a/include/linux/dm-io.h b/include/linux/dm-io.h
index 7595142f3fc57..7b2968612b7e6 100644
--- a/include/linux/dm-io.h
+++ b/include/linux/dm-io.h
@@ -80,7 +80,8 @@ void dm_io_client_destroy(struct dm_io_client *client);
  * error occurred doing io to the corresponding region.
  */
 int dm_io(struct dm_io_request *io_req, unsigned int num_regions,
-	  struct dm_io_region *region, unsigned int long *sync_error_bits);
+	  struct dm_io_region *region, unsigned int long *sync_error_bits,
+	  unsigned short ioprio);
#endif	/* __KERNEL__ */
 #endif	/* _LINUX_DM_IO_H */
-- 
2.43.0



    

2025

2024

2023

2022

2021

2020

2019

2018

2017

[PATCH 6.8 711/715] dm io: Support IO priority