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-rw-r--r--drivers/block/loop.c121
-rw-r--r--drivers/block/null_blk/main.c9
-rw-r--r--drivers/block/virtio_blk.c13
3 files changed, 32 insertions, 111 deletions
diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index 86cc3b19faae..8827a768284a 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -233,72 +233,6 @@ static void loop_set_size(struct loop_device *lo, loff_t size)
kobject_uevent(&disk_to_dev(lo->lo_disk)->kobj, KOBJ_CHANGE);
}
-static int lo_write_bvec(struct file *file, struct bio_vec *bvec, loff_t *ppos)
-{
- struct iov_iter i;
- ssize_t bw;
-
- iov_iter_bvec(&i, ITER_SOURCE, bvec, 1, bvec->bv_len);
-
- bw = vfs_iter_write(file, &i, ppos, 0);
-
- if (likely(bw == bvec->bv_len))
- return 0;
-
- printk_ratelimited(KERN_ERR
- "loop: Write error at byte offset %llu, length %i.\n",
- (unsigned long long)*ppos, bvec->bv_len);
- if (bw >= 0)
- bw = -EIO;
- return bw;
-}
-
-static int lo_write_simple(struct loop_device *lo, struct request *rq,
- loff_t pos)
-{
- struct bio_vec bvec;
- struct req_iterator iter;
- int ret = 0;
-
- rq_for_each_segment(bvec, rq, iter) {
- ret = lo_write_bvec(lo->lo_backing_file, &bvec, &pos);
- if (ret < 0)
- break;
- cond_resched();
- }
-
- return ret;
-}
-
-static int lo_read_simple(struct loop_device *lo, struct request *rq,
- loff_t pos)
-{
- struct bio_vec bvec;
- struct req_iterator iter;
- struct iov_iter i;
- ssize_t len;
-
- rq_for_each_segment(bvec, rq, iter) {
- iov_iter_bvec(&i, ITER_DEST, &bvec, 1, bvec.bv_len);
- len = vfs_iter_read(lo->lo_backing_file, &i, &pos, 0);
- if (len < 0)
- return len;
-
- flush_dcache_page(bvec.bv_page);
-
- if (len != bvec.bv_len) {
- struct bio *bio;
-
- __rq_for_each_bio(bio, rq)
- zero_fill_bio(bio);
- break;
- }
- cond_resched();
- }
-
- return 0;
-}
-
static void loop_clear_limits(struct loop_device *lo, int mode)
{
struct queue_limits lim = queue_limits_start_update(lo->lo_queue);
@@ -357,7 +291,7 @@ static void lo_complete_rq(struct request *rq)
struct loop_cmd *cmd = blk_mq_rq_to_pdu(rq);
blk_status_t ret = BLK_STS_OK;
- if (!cmd->use_aio || cmd->ret < 0 || cmd->ret == blk_rq_bytes(rq) ||
+ if (cmd->ret < 0 || cmd->ret == blk_rq_bytes(rq) ||
req_op(rq) != REQ_OP_READ) {
if (cmd->ret < 0)
ret = errno_to_blk_status(cmd->ret);
@@ -373,14 +307,13 @@ static void lo_complete_rq(struct request *rq)
cmd->ret = 0;
blk_mq_requeue_request(rq, true);
} else {
- if (cmd->use_aio) {
- struct bio *bio = rq->bio;
+ struct bio *bio = rq->bio;
- while (bio) {
- zero_fill_bio(bio);
- bio = bio->bi_next;
- }
+ while (bio) {
+ zero_fill_bio(bio);
+ bio = bio->bi_next;
}
+
ret = BLK_STS_IOERR;
end_io:
blk_mq_end_request(rq, ret);
@@ -460,9 +393,14 @@ static int lo_rw_aio(struct loop_device *lo, struct loop_cmd *cmd,
cmd->iocb.ki_pos = pos;
cmd->iocb.ki_filp = file;
- cmd->iocb.ki_complete = lo_rw_aio_complete;
- cmd->iocb.ki_flags = IOCB_DIRECT;
- cmd->iocb.ki_ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_NONE, 0);
+ cmd->iocb.ki_ioprio = req_get_ioprio(rq);
+ if (cmd->use_aio) {
+ cmd->iocb.ki_complete = lo_rw_aio_complete;
+ cmd->iocb.ki_flags = IOCB_DIRECT;
+ } else {
+ cmd->iocb.ki_complete = NULL;
+ cmd->iocb.ki_flags = 0;
+ }
if (rw == ITER_SOURCE)
ret = file->f_op->write_iter(&cmd->iocb, &iter);
@@ -473,7 +411,7 @@ static int lo_rw_aio(struct loop_device *lo, struct loop_cmd *cmd,
if (ret != -EIOCBQUEUED)
lo_rw_aio_complete(&cmd->iocb, ret);
- return 0;
+ return -EIOCBQUEUED;
}
static int do_req_filebacked(struct loop_device *lo, struct request *rq)
@@ -481,15 +419,6 @@ static int do_req_filebacked(struct loop_device *lo, struct request *rq)
struct loop_cmd *cmd = blk_mq_rq_to_pdu(rq);
loff_t pos = ((loff_t) blk_rq_pos(rq) << 9) + lo->lo_offset;
- /*
- * lo_write_simple and lo_read_simple should have been covered
- * by io submit style function like lo_rw_aio(), one blocker
- * is that lo_read_simple() need to call flush_dcache_page after
- * the page is written from kernel, and it isn't easy to handle
- * this in io submit style function which submits all segments
- * of the req at one time. And direct read IO doesn't need to
- * run flush_dcache_page().
- */
switch (req_op(rq)) {
case REQ_OP_FLUSH:
return lo_req_flush(lo, rq);
@@ -505,15 +434,9 @@ static int do_req_filebacked(struct loop_device *lo, struct request *rq)
case REQ_OP_DISCARD:
return lo_fallocate(lo, rq, pos, FALLOC_FL_PUNCH_HOLE);
case REQ_OP_WRITE:
- if (cmd->use_aio)
- return lo_rw_aio(lo, cmd, pos, ITER_SOURCE);
- else
- return lo_write_simple(lo, rq, pos);
+ return lo_rw_aio(lo, cmd, pos, ITER_SOURCE);
case REQ_OP_READ:
- if (cmd->use_aio)
- return lo_rw_aio(lo, cmd, pos, ITER_DEST);
- else
- return lo_read_simple(lo, rq, pos);
+ return lo_rw_aio(lo, cmd, pos, ITER_DEST);
default:
WARN_ON_ONCE(1);
return -EIO;
@@ -645,19 +568,20 @@ static int loop_change_fd(struct loop_device *lo, struct block_device *bdev,
* dependency.
*/
fput(old_file);
+ dev_set_uevent_suppress(disk_to_dev(lo->lo_disk), 0);
if (partscan)
loop_reread_partitions(lo);
error = 0;
done:
- /* enable and uncork uevent now that we are done */
- dev_set_uevent_suppress(disk_to_dev(lo->lo_disk), 0);
+ kobject_uevent(&disk_to_dev(lo->lo_disk)->kobj, KOBJ_CHANGE);
return error;
out_err:
loop_global_unlock(lo, is_loop);
out_putf:
fput(file);
+ dev_set_uevent_suppress(disk_to_dev(lo->lo_disk), 0);
goto done;
}
@@ -1111,8 +1035,8 @@ static int loop_configure(struct loop_device *lo, blk_mode_t mode,
if (partscan)
clear_bit(GD_SUPPRESS_PART_SCAN, &lo->lo_disk->state);
- /* enable and uncork uevent now that we are done */
dev_set_uevent_suppress(disk_to_dev(lo->lo_disk), 0);
+ kobject_uevent(&disk_to_dev(lo->lo_disk)->kobj, KOBJ_CHANGE);
loop_global_unlock(lo, is_loop);
if (partscan)
@@ -1888,7 +1812,6 @@ static void loop_handle_cmd(struct loop_cmd *cmd)
struct loop_device *lo = rq->q->queuedata;
int ret = 0;
struct mem_cgroup *old_memcg = NULL;
- const bool use_aio = cmd->use_aio;
if (write && (lo->lo_flags & LO_FLAGS_READ_ONLY)) {
ret = -EIO;
@@ -1918,7 +1841,7 @@ static void loop_handle_cmd(struct loop_cmd *cmd)
}
failed:
/* complete non-aio request */
- if (!use_aio || ret) {
+ if (ret != -EIOCBQUEUED) {
if (ret == -EOPNOTSUPP)
cmd->ret = ret;
else
diff --git a/drivers/block/null_blk/main.c b/drivers/block/null_blk/main.c
index c479348ce8ff..f10369ad90f7 100644
--- a/drivers/block/null_blk/main.c
+++ b/drivers/block/null_blk/main.c
@@ -1638,10 +1638,9 @@ static blk_status_t null_queue_rq(struct blk_mq_hw_ctx *hctx,
return BLK_STS_OK;
}
-static void null_queue_rqs(struct request **rqlist)
+static void null_queue_rqs(struct rq_list *rqlist)
{
- struct request *requeue_list = NULL;
- struct request **requeue_lastp = &requeue_list;
+ struct rq_list requeue_list = {};
struct blk_mq_queue_data bd = { };
blk_status_t ret;
@@ -1651,8 +1650,8 @@ static void null_queue_rqs(struct request **rqlist)
bd.rq = rq;
ret = null_queue_rq(rq->mq_hctx, &bd);
if (ret != BLK_STS_OK)
- rq_list_add_tail(&requeue_lastp, rq);
- } while (!rq_list_empty(*rqlist));
+ rq_list_add_tail(&requeue_list, rq);
+ } while (!rq_list_empty(rqlist));
*rqlist = requeue_list;
}
diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c
index 44a6937a4b65..fd6c565f8a50 100644
--- a/drivers/block/virtio_blk.c
+++ b/drivers/block/virtio_blk.c
@@ -472,7 +472,7 @@ static bool virtblk_prep_rq_batch(struct request *req)
}
static void virtblk_add_req_batch(struct virtio_blk_vq *vq,
- struct request **rqlist)
+ struct rq_list *rqlist)
{
struct request *req;
unsigned long flags;
@@ -499,11 +499,10 @@ static void virtblk_add_req_batch(struct virtio_blk_vq *vq,
virtqueue_notify(vq->vq);
}
-static void virtio_queue_rqs(struct request **rqlist)
+static void virtio_queue_rqs(struct rq_list *rqlist)
{
- struct request *submit_list = NULL;
- struct request *requeue_list = NULL;
- struct request **requeue_lastp = &requeue_list;
+ struct rq_list submit_list = { };
+ struct rq_list requeue_list = { };
struct virtio_blk_vq *vq = NULL;
struct request *req;
@@ -515,9 +514,9 @@ static void virtio_queue_rqs(struct request **rqlist)
vq = this_vq;
if (virtblk_prep_rq_batch(req))
- rq_list_add(&submit_list, req); /* reverse order */
+ rq_list_add_tail(&submit_list, req);
else
- rq_list_add_tail(&requeue_lastp, req);
+ rq_list_add_tail(&requeue_list, req);
}
if (vq)
generated by cgit v1.2.3 (git 2.39.0) at 2025-04-30 13:22:12 +0300