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path: root/drivers/md/dm-bufio.c
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Diffstat (limited to 'drivers/md/dm-bufio.c')
-rw-r--r--drivers/md/dm-bufio.c74
1 files changed, 52 insertions, 22 deletions
diff --git a/drivers/md/dm-bufio.c b/drivers/md/dm-bufio.c
index 13c65b7e1ed6..098bf526136c 100644
--- a/drivers/md/dm-bufio.c
+++ b/drivers/md/dm-bufio.c
@@ -1292,7 +1292,8 @@ static void dmio_complete(unsigned long error, void *context)
}
static void use_dmio(struct dm_buffer *b, enum req_op op, sector_t sector,
- unsigned int n_sectors, unsigned int offset)
+ unsigned int n_sectors, unsigned int offset,
+ unsigned short ioprio)
{
int r;
struct dm_io_request io_req = {
@@ -1315,7 +1316,7 @@ 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);
if (unlikely(r))
b->end_io(b, errno_to_blk_status(r));
}
@@ -1331,7 +1332,8 @@ static void bio_complete(struct bio *bio)
}
static void use_bio(struct dm_buffer *b, enum req_op op, sector_t sector,
- unsigned int n_sectors, unsigned int offset)
+ unsigned int n_sectors, unsigned int offset,
+ unsigned short ioprio)
{
struct bio *bio;
char *ptr;
@@ -1339,13 +1341,14 @@ static void use_bio(struct dm_buffer *b, enum req_op op, sector_t sector,
bio = bio_kmalloc(1, GFP_NOWAIT | __GFP_NORETRY | __GFP_NOWARN);
if (!bio) {
- use_dmio(b, op, sector, n_sectors, offset);
+ use_dmio(b, op, sector, n_sectors, offset, ioprio);
return;
}
bio_init(bio, b->c->bdev, bio->bi_inline_vecs, 1, op);
bio->bi_iter.bi_sector = sector;
bio->bi_end_io = bio_complete;
bio->bi_private = b;
+ bio->bi_ioprio = ioprio;
ptr = (char *)b->data + offset;
len = n_sectors << SECTOR_SHIFT;
@@ -1368,7 +1371,7 @@ static inline sector_t block_to_sector(struct dm_bufio_client *c, sector_t block
return sector;
}
-static void submit_io(struct dm_buffer *b, enum req_op op,
+static void submit_io(struct dm_buffer *b, enum req_op op, unsigned short ioprio,
void (*end_io)(struct dm_buffer *, blk_status_t))
{
unsigned int n_sectors;
@@ -1398,9 +1401,9 @@ static void submit_io(struct dm_buffer *b, enum req_op op,
}
if (b->data_mode != DATA_MODE_VMALLOC)
- use_bio(b, op, sector, n_sectors, offset);
+ use_bio(b, op, sector, n_sectors, offset, ioprio);
else
- use_dmio(b, op, sector, n_sectors, offset);
+ use_dmio(b, op, sector, n_sectors, offset, ioprio);
}
/*
@@ -1456,7 +1459,7 @@ static void __write_dirty_buffer(struct dm_buffer *b,
b->write_end = b->dirty_end;
if (!write_list)
- submit_io(b, REQ_OP_WRITE, write_endio);
+ submit_io(b, REQ_OP_WRITE, IOPRIO_DEFAULT, write_endio);
else
list_add_tail(&b->write_list, write_list);
}
@@ -1470,7 +1473,7 @@ static void __flush_write_list(struct list_head *write_list)
struct dm_buffer *b =
list_entry(write_list->next, struct dm_buffer, write_list);
list_del(&b->write_list);
- submit_io(b, REQ_OP_WRITE, write_endio);
+ submit_io(b, REQ_OP_WRITE, IOPRIO_DEFAULT, write_endio);
cond_resched();
}
blk_finish_plug(&plug);
@@ -1852,7 +1855,8 @@ static void read_endio(struct dm_buffer *b, blk_status_t status)
* and uses dm_bufio_mark_buffer_dirty to write new data back).
*/
static void *new_read(struct dm_bufio_client *c, sector_t block,
- enum new_flag nf, struct dm_buffer **bp)
+ enum new_flag nf, struct dm_buffer **bp,
+ unsigned short ioprio)
{
int need_submit = 0;
struct dm_buffer *b;
@@ -1905,7 +1909,7 @@ static void *new_read(struct dm_bufio_client *c, sector_t block,
return NULL;
if (need_submit)
- submit_io(b, REQ_OP_READ, read_endio);
+ submit_io(b, REQ_OP_READ, ioprio, read_endio);
if (nf != NF_GET) /* we already tested this condition above */
wait_on_bit_io(&b->state, B_READING, TASK_UNINTERRUPTIBLE);
@@ -1926,32 +1930,46 @@ static void *new_read(struct dm_bufio_client *c, sector_t block,
void *dm_bufio_get(struct dm_bufio_client *c, sector_t block,
struct dm_buffer **bp)
{
- return new_read(c, block, NF_GET, bp);
+ return new_read(c, block, NF_GET, bp, IOPRIO_DEFAULT);
}
EXPORT_SYMBOL_GPL(dm_bufio_get);
-void *dm_bufio_read(struct dm_bufio_client *c, sector_t block,
- struct dm_buffer **bp)
+static void *__dm_bufio_read(struct dm_bufio_client *c, sector_t block,
+ struct dm_buffer **bp, unsigned short ioprio)
{
if (WARN_ON_ONCE(dm_bufio_in_request()))
return ERR_PTR(-EINVAL);
- return new_read(c, block, NF_READ, bp);
+ return new_read(c, block, NF_READ, bp, ioprio);
+}
+
+void *dm_bufio_read(struct dm_bufio_client *c, sector_t block,
+ struct dm_buffer **bp)
+{
+ return __dm_bufio_read(c, block, bp, IOPRIO_DEFAULT);
}
EXPORT_SYMBOL_GPL(dm_bufio_read);
+void *dm_bufio_read_with_ioprio(struct dm_bufio_client *c, sector_t block,
+ struct dm_buffer **bp, unsigned short ioprio)
+{
+ return __dm_bufio_read(c, block, bp, ioprio);
+}
+EXPORT_SYMBOL_GPL(dm_bufio_read_with_ioprio);
+
void *dm_bufio_new(struct dm_bufio_client *c, sector_t block,
struct dm_buffer **bp)
{
if (WARN_ON_ONCE(dm_bufio_in_request()))
return ERR_PTR(-EINVAL);
- return new_read(c, block, NF_FRESH, bp);
+ return new_read(c, block, NF_FRESH, bp, IOPRIO_DEFAULT);
}
EXPORT_SYMBOL_GPL(dm_bufio_new);
-void dm_bufio_prefetch(struct dm_bufio_client *c,
- sector_t block, unsigned int n_blocks)
+static void __dm_bufio_prefetch(struct dm_bufio_client *c,
+ sector_t block, unsigned int n_blocks,
+ unsigned short ioprio)
{
struct blk_plug plug;
@@ -1987,7 +2005,7 @@ void dm_bufio_prefetch(struct dm_bufio_client *c,
dm_bufio_unlock(c);
if (need_submit)
- submit_io(b, REQ_OP_READ, read_endio);
+ submit_io(b, REQ_OP_READ, ioprio, read_endio);
dm_bufio_release(b);
cond_resched();
@@ -2002,8 +2020,20 @@ void dm_bufio_prefetch(struct dm_bufio_client *c,
flush_plug:
blk_finish_plug(&plug);
}
+
+void dm_bufio_prefetch(struct dm_bufio_client *c, sector_t block, unsigned int n_blocks)
+{
+ return __dm_bufio_prefetch(c, block, n_blocks, IOPRIO_DEFAULT);
+}
EXPORT_SYMBOL_GPL(dm_bufio_prefetch);
+void dm_bufio_prefetch_with_ioprio(struct dm_bufio_client *c, sector_t block,
+ unsigned int n_blocks, unsigned short ioprio)
+{
+ return __dm_bufio_prefetch(c, block, n_blocks, ioprio);
+}
+EXPORT_SYMBOL_GPL(dm_bufio_prefetch_with_ioprio);
+
void dm_bufio_release(struct dm_buffer *b)
{
struct dm_bufio_client *c = b->c;
@@ -2167,7 +2197,7 @@ 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 +2221,7 @@ 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);
@@ -2968,6 +2998,6 @@ MODULE_PARM_DESC(allocated_vmalloc_bytes, "Memory allocated with vmalloc");
module_param_named(current_allocated_bytes, dm_bufio_current_allocated, ulong, 0444);
MODULE_PARM_DESC(current_allocated_bytes, "Memory currently used by the cache");
-MODULE_AUTHOR("Mikulas Patocka <dm-devel@redhat.com>");
+MODULE_AUTHOR("Mikulas Patocka <dm-devel@lists.linux.dev>");
MODULE_DESCRIPTION(DM_NAME " buffered I/O library");
MODULE_LICENSE("GPL");
generated by cgit v1.2.3 (git 2.39.0) at 2024-07-08 21:17:34 +0300