diff --git a/block/bio.c b/block/bio.c
index 54ee3846c3a5e045b4f4578a11a1972f17336f6a..3f76a38a5e2d66f81fe78e4d3feffe825e3214eb 100644
--- a/block/bio.c
+++ b/block/bio.c
@@ -583,6 +583,8 @@ void __bio_clone_fast(struct bio *bio, struct bio *bio_src)
bio->bi_rw = bio_src->bi_rw;
bio->bi_iter = bio_src->bi_iter;
bio->bi_io_vec = bio_src->bi_io_vec;
+
+ bio_clone_blkcg_association(bio, bio_src);
}
EXPORT_SYMBOL(__bio_clone_fast);
@@ -687,6 +689,8 @@ struct bio *bio_clone_bioset(struct bio *bio_src, gfp_t gfp_mask,
}
}
+ bio_clone_blkcg_association(bio, bio_src);
+
return bio;
}
EXPORT_SYMBOL(bio_clone_bioset);
@@ -2004,6 +2008,17 @@ void bio_disassociate_task(struct bio *bio)
}
}
+/**
+ * bio_clone_blkcg_association - clone blkcg association from src to dst bio
+ * @dst: destination bio
+ * @src: source bio
+ */
+void bio_clone_blkcg_association(struct bio *dst, struct bio *src)
+{
+ if (src->bi_css)
+ WARN_ON(bio_associate_blkcg(dst, src->bi_css));
+}
+
#endif /* CONFIG_BLK_CGROUP */
static void __init biovec_init_slabs(void)
diff --git a/block/blk-mq-sysfs.c b/block/blk-mq-sysfs.c
index 4ea4dd8a1eed5a46763fd59f391faad8ff91d3b5..fe822aa5b8e4a16fdb074d351959961d94de48e5 100644
--- a/block/blk-mq-sysfs.c
+++ b/block/blk-mq-sysfs.c
@@ -380,15 +380,13 @@ static int blk_mq_register_hctx(struct blk_mq_hw_ctx *hctx)
return ret;
}
-void blk_mq_unregister_disk(struct gendisk *disk)
+static void __blk_mq_unregister_disk(struct gendisk *disk)
{
struct request_queue *q = disk->queue;
struct blk_mq_hw_ctx *hctx;
struct blk_mq_ctx *ctx;
int i, j;
- blk_mq_disable_hotplug();
-
queue_for_each_hw_ctx(q, hctx, i) {
blk_mq_unregister_hctx(hctx);
@@ -405,6 +403,12 @@ void blk_mq_unregister_disk(struct gendisk *disk)
kobject_put(&disk_to_dev(disk)->kobj);
q->mq_sysfs_init_done = false;
+}
+
+void blk_mq_unregister_disk(struct gendisk *disk)
+{
+ blk_mq_disable_hotplug();
+ __blk_mq_unregister_disk(disk);
blk_mq_enable_hotplug();
}
@@ -450,7 +454,7 @@ int blk_mq_register_disk(struct gendisk *disk)
}
if (ret)
- blk_mq_unregister_disk(disk);
+ __blk_mq_unregister_disk(disk);
else
q->mq_sysfs_init_done = true;
out:
diff --git a/block/blk-mq.c b/block/blk-mq.c
index 576e7112f8071179b0c8f44bef799dfa5bc75c33..6a63da101bc4db2126ae768ade7f6719426b2fa3 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -672,7 +672,20 @@ static void blk_mq_timeout_work(struct work_struct *work)
};
int i;
- if (blk_queue_enter(q, true))
+ /* A deadlock might occur if a request is stuck requiring a
+ * timeout at the same time a queue freeze is waiting
+ * completion, since the timeout code would not be able to
+ * acquire the queue reference here.
+ *
+ * That's why we don't use blk_queue_enter here; instead, we use
+ * percpu_ref_tryget directly, because we need to be able to
+ * obtain a reference even in the short window between the queue
+ * starting to freeze, by dropping the first reference in
+ * blk_mq_freeze_queue_start, and the moment the last request is
+ * consumed, marked by the instant q_usage_counter reaches
+ * zero.
+ */
+ if (!percpu_ref_tryget(&q->q_usage_counter))
return;
blk_mq_queue_tag_busy_iter(q, blk_mq_check_expired, &data);
diff --git a/block/blk-throttle.c b/block/blk-throttle.c
index 47a3e540631a38b123a078350d28ae457753ebbd..c5494e40323992705ad56167267ea971251b0569 100644
--- a/block/blk-throttle.c
+++ b/block/blk-throttle.c
@@ -145,11 +145,6 @@ struct throtl_data
/* Total Number of queued bios on READ and WRITE lists */
unsigned int nr_queued[2];
- /*
- * number of total undestroyed groups
- */
- unsigned int nr_undestroyed_grps;
-
/* Work for dispatching throttled bios */
struct work_struct dispatch_work;
};
diff --git a/block/genhd.c b/block/genhd.c
index 3c9dede4e04f9a1f3f6c446affc68c8694b01db1..fcd6d4fae657cfdf118274cec31780f9e8b8c1f8 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -614,7 +614,7 @@ void device_add_disk(struct device *parent, struct gendisk *disk)
/* Register BDI before referencing it from bdev */
bdi = &disk->queue->backing_dev_info;
- bdi_register_dev(bdi, disk_devt(disk));
+ bdi_register_owner(bdi, disk_to_dev(disk));
blk_register_region(disk_devt(disk), disk->minors, NULL,
exact_match, exact_lock, disk);
@@ -856,6 +856,7 @@ static void disk_seqf_stop(struct seq_file *seqf, void *v)
if (iter) {
class_dev_iter_exit(iter);
kfree(iter);
+ seqf->private = NULL;
}
}
diff --git a/drivers/block/brd.c b/drivers/block/brd.c
index 3022dad240719138d0a0aca0f7b6a7d2486f862a..3439b28cce8b5eec56ded1a22ced093cf5134ad7 100644
--- a/drivers/block/brd.c
+++ b/drivers/block/brd.c
@@ -300,20 +300,20 @@ static void copy_from_brd(void *dst, struct brd_device *brd,
* Process a single bvec of a bio.
*/
static int brd_do_bvec(struct brd_device *brd, struct page *page,
- unsigned int len, unsigned int off, int rw,
+ unsigned int len, unsigned int off, int op,
sector_t sector)
{
void *mem;
int err = 0;
- if (rw != READ) {
+ if (op_is_write(op)) {
err = copy_to_brd_setup(brd, sector, len);
if (err)
goto out;
}
mem = kmap_atomic(page);
- if (rw == READ) {
+ if (!op_is_write(op)) {
copy_from_brd(mem + off, brd, sector, len);
flush_dcache_page(page);
} else {
@@ -330,7 +330,6 @@ static blk_qc_t brd_make_request(struct request_queue *q, struct bio *bio)
{
struct block_device *bdev = bio->bi_bdev;
struct brd_device *brd = bdev->bd_disk->private_data;
- int rw;
struct bio_vec bvec;
sector_t sector;
struct bvec_iter iter;
@@ -347,14 +346,12 @@ static blk_qc_t brd_make_request(struct request_queue *q, struct bio *bio)
goto out;
}
- rw = bio_data_dir(bio);
-
bio_for_each_segment(bvec, bio, iter) {
unsigned int len = bvec.bv_len;
int err;
err = brd_do_bvec(brd, bvec.bv_page, len,
- bvec.bv_offset, rw, sector);
+ bvec.bv_offset, bio_op(bio), sector);
if (err)
goto io_error;
sector += len >> SECTOR_SHIFT;
@@ -369,11 +366,11 @@ static blk_qc_t brd_make_request(struct request_queue *q, struct bio *bio)
}
static int brd_rw_page(struct block_device *bdev, sector_t sector,
- struct page *page, int rw)
+ struct page *page, int op)
{
struct brd_device *brd = bdev->bd_disk->private_data;
- int err = brd_do_bvec(brd, page, PAGE_SIZE, 0, rw, sector);
- page_endio(page, rw & WRITE, err);
+ int err = brd_do_bvec(brd, page, PAGE_SIZE, 0, op, sector);
+ page_endio(page, op, err);
return err;
}
diff --git a/drivers/block/floppy.c b/drivers/block/floppy.c
index c557057fe8ae05fd3ce2f93dc8f0c801083cb24f..b71a9c76700956e1ddfda4e742a2053b0f0769fe 100644
--- a/drivers/block/floppy.c
+++ b/drivers/block/floppy.c
@@ -3663,11 +3663,6 @@ static int floppy_open(struct block_device *bdev, fmode_t mode)
opened_bdev[drive] = bdev;
- if (!(mode & (FMODE_READ|FMODE_WRITE))) {
- res = -EINVAL;
- goto out;
- }
-
res = -ENXIO;
if (!floppy_track_buffer) {
@@ -3711,13 +3706,15 @@ static int floppy_open(struct block_device *bdev, fmode_t mode)
if (UFDCS->rawcmd == 1)
UFDCS->rawcmd = 2;
- UDRS->last_checked = 0;
- clear_bit(FD_OPEN_SHOULD_FAIL_BIT, &UDRS->flags);
- check_disk_change(bdev);
- if (test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags))
- goto out;
- if (test_bit(FD_OPEN_SHOULD_FAIL_BIT, &UDRS->flags))
- goto out;
+ if (mode & (FMODE_READ|FMODE_WRITE)) {
+ UDRS->last_checked = 0;
+ clear_bit(FD_OPEN_SHOULD_FAIL_BIT, &UDRS->flags);
+ check_disk_change(bdev);
+ if (test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags))
+ goto out;
+ if (test_bit(FD_OPEN_SHOULD_FAIL_BIT, &UDRS->flags))
+ goto out;
+ }
res = -EROFS;
diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index 075377eee0c0bcafed761e4034ab69e17ef9d5b8..c9f2107f7095148dc5e4027d7cb8fdc4794aad01 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -510,14 +510,10 @@ static int lo_rw_aio(struct loop_device *lo, struct loop_cmd *cmd,
return 0;
}
-
-static inline int lo_rw_simple(struct loop_device *lo,
- struct request *rq, loff_t pos, bool rw)
+static int do_req_filebacked(struct loop_device *lo, struct request *rq)
{
struct loop_cmd *cmd = blk_mq_rq_to_pdu(rq);
-
- if (cmd->use_aio)
- return lo_rw_aio(lo, cmd, pos, rw);
+ loff_t pos = ((loff_t) blk_rq_pos(rq) << 9) + lo->lo_offset;
/*
* lo_write_simple and lo_read_simple should have been covered
@@ -528,37 +524,30 @@ static inline int lo_rw_simple(struct loop_device *lo,
* of the req at one time. And direct read IO doesn't need to
* run flush_dcache_page().
*/
- if (rw == WRITE)
- return lo_write_simple(lo, rq, pos);
- else
- return lo_read_simple(lo, rq, pos);
-}
-
-static int do_req_filebacked(struct loop_device *lo, struct request *rq)
-{
- loff_t pos;
- int ret;
-
- pos = ((loff_t) blk_rq_pos(rq) << 9) + lo->lo_offset;
-
- if (op_is_write(req_op(rq))) {
- if (req_op(rq) == REQ_OP_FLUSH)
- ret = lo_req_flush(lo, rq);
- else if (req_op(rq) == REQ_OP_DISCARD)
- ret = lo_discard(lo, rq, pos);
- else if (lo->transfer)
- ret = lo_write_transfer(lo, rq, pos);
+ switch (req_op(rq)) {
+ case REQ_OP_FLUSH:
+ return lo_req_flush(lo, rq);
+ case REQ_OP_DISCARD:
+ return lo_discard(lo, rq, pos);
+ case REQ_OP_WRITE:
+ if (lo->transfer)
+ return lo_write_transfer(lo, rq, pos);
+ else if (cmd->use_aio)
+ return lo_rw_aio(lo, cmd, pos, WRITE);
else
- ret = lo_rw_simple(lo, rq, pos, WRITE);
-
- } else {
+ return lo_write_simple(lo, rq, pos);
+ case REQ_OP_READ:
if (lo->transfer)
- ret = lo_read_transfer(lo, rq, pos);
+ return lo_read_transfer(lo, rq, pos);
+ else if (cmd->use_aio)
+ return lo_rw_aio(lo, cmd, pos, READ);
else
- ret = lo_rw_simple(lo, rq, pos, READ);
+ return lo_read_simple(lo, rq, pos);
+ default:
+ WARN_ON_ONCE(1);
+ return -EIO;
+ break;
}
-
- return ret;
}
struct switch_request {
@@ -1659,11 +1648,15 @@ static int loop_queue_rq(struct blk_mq_hw_ctx *hctx,
if (lo->lo_state != Lo_bound)
return -EIO;
- if (lo->use_dio && (req_op(cmd->rq) != REQ_OP_FLUSH ||
- req_op(cmd->rq) == REQ_OP_DISCARD))
- cmd->use_aio = true;
- else
+ switch (req_op(cmd->rq)) {
+ case REQ_OP_FLUSH:
+ case REQ_OP_DISCARD:
cmd->use_aio = false;
+ break;
+ default:
+ cmd->use_aio = lo->use_dio;
+ break;
+ }
queue_kthread_work(&lo->worker, &cmd->work);
diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
index 6f55b262b5ced7c371115091e248421248b35c18..a9e398019f38156893bfe36204691886090b05ba 100644
--- a/drivers/block/nbd.c
+++ b/drivers/block/nbd.c
@@ -451,14 +451,9 @@ static int nbd_thread_recv(struct nbd_device *nbd, struct block_device *bdev)
sk_set_memalloc(nbd->sock->sk);
- nbd->task_recv = current;
-
ret = device_create_file(disk_to_dev(nbd->disk), &pid_attr);
if (ret) {
dev_err(disk_to_dev(nbd->disk), "device_create_file failed!\n");
-
- nbd->task_recv = NULL;
-
return ret;
}
@@ -477,9 +472,6 @@ static int nbd_thread_recv(struct nbd_device *nbd, struct block_device *bdev)
nbd_size_clear(nbd, bdev);
device_remove_file(disk_to_dev(nbd->disk), &pid_attr);
-
- nbd->task_recv = NULL;
-
return ret;
}
@@ -788,6 +780,8 @@ static int __nbd_ioctl(struct block_device *bdev, struct nbd_device *nbd,
if (!nbd->sock)
return -EINVAL;
+ /* We have to claim the device under the lock */
+ nbd->task_recv = current;
mutex_unlock(&nbd->tx_lock);
nbd_parse_flags(nbd, bdev);
@@ -796,6 +790,7 @@ static int __nbd_ioctl(struct block_device *bdev, struct nbd_device *nbd,
nbd_name(nbd));
if (IS_ERR(thread)) {
mutex_lock(&nbd->tx_lock);
+ nbd->task_recv = NULL;
return PTR_ERR(thread);
}
@@ -805,6 +800,7 @@ static int __nbd_ioctl(struct block_device *bdev, struct nbd_device *nbd,
kthread_stop(thread);
mutex_lock(&nbd->tx_lock);
+ nbd->task_recv = NULL;
sock_shutdown(nbd);
nbd_clear_que(nbd);
diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c
index 7454cf188c8e24bafe0815b4c289ed01545c1be3..ca29649c4b0871b4236d67b8bfee8c5d7fe57e09 100644
--- a/drivers/block/zram/zram_drv.c
+++ b/drivers/block/zram/zram_drv.c
@@ -843,15 +843,15 @@ static void zram_bio_discard(struct zram *zram, u32 index,
}
static int zram_bvec_rw(struct zram *zram, struct bio_vec *bvec, u32 index,
- int offset, int rw)
+ int offset, int op)
{
unsigned long start_time = jiffies;
int ret;
- generic_start_io_acct(rw, bvec->bv_len >> SECTOR_SHIFT,
+ generic_start_io_acct(op, bvec->bv_len >> SECTOR_SHIFT,
&zram->disk->part0);
- if (rw == READ) {
+ if (!op_is_write(op)) {
atomic64_inc(&zram->stats.num_reads);
ret = zram_bvec_read(zram, bvec, index, offset);
} else {
@@ -859,10 +859,10 @@ static int zram_bvec_rw(struct zram *zram, struct bio_vec *bvec, u32 index,
ret = zram_bvec_write(zram, bvec, index, offset);
}
- generic_end_io_acct(rw, &zram->disk->part0, start_time);
+ generic_end_io_acct(op, &zram->disk->part0, start_time);
if (unlikely(ret)) {
- if (rw == READ)
+ if (!op_is_write(op))
atomic64_inc(&zram->stats.failed_reads);
else
atomic64_inc(&zram->stats.failed_writes);
@@ -873,7 +873,7 @@ static int zram_bvec_rw(struct zram *zram, struct bio_vec *bvec, u32 index,
static void __zram_make_request(struct zram *zram, struct bio *bio)
{
- int offset, rw;
+ int offset;
u32 index;
struct bio_vec bvec;
struct bvec_iter iter;
@@ -888,7 +888,6 @@ static void __zram_make_request(struct zram *zram, struct bio *bio)
return;
}
- rw = bio_data_dir(bio);
bio_for_each_segment(bvec, bio, iter) {
int max_transfer_size = PAGE_SIZE - offset;
@@ -903,15 +902,18 @@ static void __zram_make_request(struct zram *zram, struct bio *bio)
bv.bv_len = max_transfer_size;
bv.bv_offset = bvec.bv_offset;
- if (zram_bvec_rw(zram, &bv, index, offset, rw) < 0)
+ if (zram_bvec_rw(zram, &bv, index, offset,
+ bio_op(bio)) < 0)
goto out;
bv.bv_len = bvec.bv_len - max_transfer_size;
bv.bv_offset += max_transfer_size;
- if (zram_bvec_rw(zram, &bv, index + 1, 0, rw) < 0)
+ if (zram_bvec_rw(zram, &bv, index + 1, 0,
+ bio_op(bio)) < 0)
goto out;
} else
- if (zram_bvec_rw(zram, &bvec, index, offset, rw) < 0)
+ if (zram_bvec_rw(zram, &bvec, index, offset,
+ bio_op(bio)) < 0)
goto out;
update_position(&index, &offset, &bvec);
@@ -968,7 +970,7 @@ static void zram_slot_free_notify(struct block_device *bdev,
}
static int zram_rw_page(struct block_device *bdev, sector_t sector,
- struct page *page, int rw)
+ struct page *page, int op)
{
int offset, err = -EIO;
u32 index;
@@ -992,7 +994,7 @@ static int zram_rw_page(struct block_device *bdev, sector_t sector,
bv.bv_len = PAGE_SIZE;
bv.bv_offset = 0;
- err = zram_bvec_rw(zram, &bv, index, offset, rw);
+ err = zram_bvec_rw(zram, &bv, index, offset, op);
put_zram:
zram_meta_put(zram);
out:
@@ -1005,7 +1007,7 @@ static int zram_rw_page(struct block_device *bdev, sector_t sector,
* (e.g., SetPageError, set_page_dirty and extra works).
*/
if (err == 0)
- page_endio(page, rw, 0);
+ page_endio(page, op, 0);
return err;
}
diff --git a/drivers/nvdimm/btt.c b/drivers/nvdimm/btt.c
index 9dce03f420eb5f77e8dc625c018c35014591abe4..7cf3bdfaf809f2be9a79db6ff08d9a2da663442a 100644
--- a/drivers/nvdimm/btt.c
+++ b/drivers/nvdimm/btt.c
@@ -1133,11 +1133,11 @@ static int btt_write_pg(struct btt *btt, struct bio_integrity_payload *bip,
static int btt_do_bvec(struct btt *btt, struct bio_integrity_payload *bip,
struct page *page, unsigned int len, unsigned int off,
- int rw, sector_t sector)
+ int op, sector_t sector)
{
int ret;
- if (rw == READ) {
+ if (!op_is_write(op)) {
ret = btt_read_pg(btt, bip, page, off, sector, len);
flush_dcache_page(page);
} else {
@@ -1155,7 +1155,7 @@ static blk_qc_t btt_make_request(struct request_queue *q, struct bio *bio)
struct bvec_iter iter;
unsigned long start;
struct bio_vec bvec;
- int err = 0, rw;
+ int err = 0;
bool do_acct;
/*
@@ -1170,7 +1170,6 @@ static blk_qc_t btt_make_request(struct request_queue *q, struct bio *bio)
}
do_acct = nd_iostat_start(bio, &start);
- rw = bio_data_dir(bio);
bio_for_each_segment(bvec, bio, iter) {
unsigned int len = bvec.bv_len;
@@ -1181,11 +1180,12 @@ static blk_qc_t btt_make_request(struct request_queue *q, struct bio *bio)
BUG_ON(len % btt->sector_size);
err = btt_do_bvec(btt, bip, bvec.bv_page, len, bvec.bv_offset,
- rw, iter.bi_sector);
+ bio_op(bio), iter.bi_sector);
if (err) {
dev_info(&btt->nd_btt->dev,
"io error in %s sector %lld, len %d,\n",
- (rw == READ) ? "READ" : "WRITE",
+ (op_is_write(bio_op(bio))) ? "WRITE" :
+ "READ",
(unsigned long long) iter.bi_sector, len);
bio->bi_error = err;
break;
@@ -1200,12 +1200,12 @@ static blk_qc_t btt_make_request(struct request_queue *q, struct bio *bio)
}
static int btt_rw_page(struct block_device *bdev, sector_t sector,
- struct page *page, int rw)
+ struct page *page, int op)
{
struct btt *btt = bdev->bd_disk->private_data;
- btt_do_bvec(btt, NULL, page, PAGE_SIZE, 0, rw, sector);
- page_endio(page, rw & WRITE, 0);
+ btt_do_bvec(btt, NULL, page, PAGE_SIZE, 0, op, sector);
+ page_endio(page, op, 0);
return 0;
}
diff --git a/drivers/nvdimm/pmem.c b/drivers/nvdimm/pmem.c
index b511099457db5cbb155e5b6270bc9bb8a3677cc6..d64d92481c1d0d7349eea0cba94c921a57120309 100644
--- a/drivers/nvdimm/pmem.c
+++ b/drivers/nvdimm/pmem.c
@@ -67,7 +67,7 @@ static void pmem_clear_poison(struct pmem_device *pmem, phys_addr_t offset,
}
static int pmem_do_bvec(struct pmem_device *pmem, struct page *page,
- unsigned int len, unsigned int off, int rw,
+ unsigned int len, unsigned int off, int op,
sector_t sector)
{
int rc = 0;
@@ -79,7 +79,7 @@ static int pmem_do_bvec(struct pmem_device *pmem, struct page *page,
if (unlikely(is_bad_pmem(&pmem->bb, sector, len)))
bad_pmem = true;
- if (rw == READ) {
+ if (!op_is_write(op)) {
if (unlikely(bad_pmem))
rc = -EIO;
else {
@@ -134,7 +134,7 @@ static blk_qc_t pmem_make_request(struct request_queue *q, struct bio *bio)
do_acct = nd_iostat_start(bio, &start);
bio_for_each_segment(bvec, bio, iter) {
rc = pmem_do_bvec(pmem, bvec.bv_page, bvec.bv_len,
- bvec.bv_offset, bio_data_dir(bio),
+ bvec.bv_offset, bio_op(bio),
iter.bi_sector);
if (rc) {
bio->bi_error = rc;
@@ -152,12 +152,12 @@ static blk_qc_t pmem_make_request(struct request_queue *q, struct bio *bio)
}
static int pmem_rw_page(struct block_device *bdev, sector_t sector,
- struct page *page, int rw)
+ struct page *page, int op)
{
struct pmem_device *pmem = bdev->bd_queue->queuedata;
int rc;
- rc = pmem_do_bvec(pmem, page, PAGE_SIZE, 0, rw, sector);
+ rc = pmem_do_bvec(pmem, page, PAGE_SIZE, 0, op, sector);
/*
* The ->rw_page interface is subtle and tricky. The core
@@ -166,7 +166,7 @@ static int pmem_rw_page(struct block_device *bdev, sector_t sector,
* caused by double completion.
*/
if (rc == 0)
- page_endio(page, rw & WRITE, 0);
+ page_endio(page, op, 0);
return rc;
}
diff --git a/fs/block_dev.c b/fs/block_dev.c
index 2033a3f91d58a13b6b38334850f2edd3520fd996..d402899ba1350152a2175203372aa25529d6fe01 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -416,7 +416,8 @@ int bdev_read_page(struct block_device *bdev, sector_t sector,
result = blk_queue_enter(bdev->bd_queue, false);
if (result)
return result;
- result = ops->rw_page(bdev, sector + get_start_sect(bdev), page, READ);
+ result = ops->rw_page(bdev, sector + get_start_sect(bdev), page,
+ REQ_OP_READ);
blk_queue_exit(bdev->bd_queue);
return result;
}
@@ -445,7 +446,6 @@ int bdev_write_page(struct block_device *bdev, sector_t sector,
struct page *page, struct writeback_control *wbc)
{
int result;
- int rw = (wbc->sync_mode == WB_SYNC_ALL) ? WRITE_SYNC : WRITE;
const struct block_device_operations *ops = bdev->bd_disk->fops;
if (!ops->rw_page || bdev_get_integrity(bdev))
@@ -455,7 +455,8 @@ int bdev_write_page(struct block_device *bdev, sector_t sector,
return result;
set_page_writeback(page);
- result = ops->rw_page(bdev, sector + get_start_sect(bdev), page, rw);
+ result = ops->rw_page(bdev, sector + get_start_sect(bdev), page,
+ REQ_OP_WRITE);
if (result)
end_page_writeback(page);
else
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 80d92839d119548f1c02bcb22e6b45263c85ce80..44fe66b53c8b450b4d615e06fc5e8c159bfc9885 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -2049,7 +2049,7 @@ int repair_io_failure(struct inode *inode, u64 start, u64 length, u64 logical,
return -EIO;
}
bio->bi_bdev = dev->bdev;
- bio->bi_rw = WRITE_SYNC;
+ bio_set_op_attrs(bio, REQ_OP_WRITE, WRITE_SYNC);
bio_add_page(bio, page, length, pg_offset);
if (btrfsic_submit_bio_wait(bio)) {
@@ -2697,12 +2697,6 @@ struct bio *btrfs_bio_clone(struct bio *bio, gfp_t gfp_mask)
btrfs_bio->csum = NULL;
btrfs_bio->csum_allocated = NULL;
btrfs_bio->end_io = NULL;
-
-#ifdef CONFIG_BLK_CGROUP
- /* FIXME, put this into bio_clone_bioset */
- if (bio->bi_css)
- bio_associate_blkcg(new, bio->bi_css);
-#endif
}
return new;
}
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index e2624275d828c5d65885948e6426e8906e305a90..d64d2a515cb2ce1d162b8fd9c0c0e0e5e68a7fbb 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -245,7 +245,6 @@ int f2fs_submit_page_bio(struct f2fs_io_info *fio)
bio_put(bio);
return -EFAULT;
}
- bio->bi_rw = fio->op_flags;
bio_set_op_attrs(bio, fio->op, fio->op_flags);
__submit_bio(fio->sbi, bio, fio->type);
diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c
index 56c8fda436c0aa0d6a0883415baa4271f1265e84..4d09d4441e3ee4fb7a2939a5c2cabbfa9e08070e 100644
--- a/fs/fs-writeback.c
+++ b/fs/fs-writeback.c
@@ -1327,6 +1327,7 @@ __writeback_single_inode(struct inode *inode, struct writeback_control *wbc)
dirty = inode->i_state & I_DIRTY;
if (inode->i_state & I_DIRTY_TIME) {
if ((dirty & (I_DIRTY_SYNC | I_DIRTY_DATASYNC)) ||
+ wbc->sync_mode == WB_SYNC_ALL ||
unlikely(inode->i_state & I_DIRTY_TIME_EXPIRED) ||
unlikely(time_after(jiffies,
(inode->dirtied_time_when +
diff --git a/fs/mpage.c b/fs/mpage.c
index 2ca1f39c8cba1aefcbf330d845be6cdefd921e9e..7a09c55b4bd0d765549efa2b80efdd60556eb566 100644
--- a/fs/mpage.c
+++ b/fs/mpage.c
@@ -50,7 +50,7 @@ static void mpage_end_io(struct bio *bio)
bio_for_each_segment_all(bv, bio, i) {
struct page *page = bv->bv_page;
- page_endio(page, bio_data_dir(bio), bio->bi_error);
+ page_endio(page, bio_op(bio), bio->bi_error);
}
bio_put(bio);
diff --git a/include/linux/backing-dev-defs.h b/include/linux/backing-dev-defs.h
index 3f103076d0bfdc2d72a462ca6c3deb1ef84a3227..c357f27d54835fdb25c977a014ea8b65acf75e92 100644
--- a/include/linux/backing-dev-defs.h
+++ b/include/linux/backing-dev-defs.h
@@ -163,6 +163,7 @@ struct backing_dev_info {
wait_queue_head_t wb_waitq;
struct device *dev;
+ struct device *owner;
struct timer_list laptop_mode_wb_timer;
diff --git a/include/linux/backing-dev.h b/include/linux/backing-dev.h
index 491a91717788591384230eb7d46a5332adf6298f..43b93a947e61b286ac63ef75ac82b14954aa8bdb 100644
--- a/include/linux/backing-dev.h
+++ b/include/linux/backing-dev.h
@@ -24,6 +24,7 @@ __printf(3, 4)
int bdi_register(struct backing_dev_info *bdi, struct device *parent,
const char *fmt, ...);
int bdi_register_dev(struct backing_dev_info *bdi, dev_t dev);
+int bdi_register_owner(struct backing_dev_info *bdi, struct device *owner);
void bdi_unregister(struct backing_dev_info *bdi);
int __must_check bdi_setup_and_register(struct backing_dev_info *, char *);
diff --git a/include/linux/bio.h b/include/linux/bio.h
index 583c10810e323b0835fa856cda4930b901280989..e09a8895fc31d1a348606a29dd06e46425270595 100644
--- a/include/linux/bio.h
+++ b/include/linux/bio.h
@@ -470,11 +470,14 @@ extern unsigned int bvec_nr_vecs(unsigned short idx);
int bio_associate_blkcg(struct bio *bio, struct cgroup_subsys_state *blkcg_css);
int bio_associate_current(struct bio *bio);
void bio_disassociate_task(struct bio *bio);
+void bio_clone_blkcg_association(struct bio *dst, struct bio *src);
#else /* CONFIG_BLK_CGROUP */
static inline int bio_associate_blkcg(struct bio *bio,
struct cgroup_subsys_state *blkcg_css) { return 0; }
static inline int bio_associate_current(struct bio *bio) { return -ENOENT; }
static inline void bio_disassociate_task(struct bio *bio) { }
+static inline void bio_clone_blkcg_association(struct bio *dst,
+ struct bio *src) { }
#endif /* CONFIG_BLK_CGROUP */
#ifdef CONFIG_HIGHMEM
diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h
index f254eb264924a5d17255cfe31f07f2b628781407..14b28ff2caf8b2941592365ba564f4806893c2a4 100644
--- a/include/linux/blk_types.h
+++ b/include/linux/blk_types.h
@@ -18,6 +18,17 @@ struct cgroup_subsys_state;
typedef void (bio_end_io_t) (struct bio *);
typedef void (bio_destructor_t) (struct bio *);
+enum req_op {
+ REQ_OP_READ,
+ REQ_OP_WRITE,
+ REQ_OP_DISCARD, /* request to discard sectors */
+ REQ_OP_SECURE_ERASE, /* request to securely erase sectors */
+ REQ_OP_WRITE_SAME, /* write same block many times */
+ REQ_OP_FLUSH, /* request for cache flush */
+};
+
+#define REQ_OP_BITS 3
+
#ifdef CONFIG_BLOCK
/*
* main unit of I/O for the block layer and lower layers (ie drivers and
@@ -228,17 +239,6 @@ enum rq_flag_bits {
#define REQ_HASHED (1ULL << __REQ_HASHED)
#define REQ_MQ_INFLIGHT (1ULL << __REQ_MQ_INFLIGHT)
-enum req_op {
- REQ_OP_READ,
- REQ_OP_WRITE,
- REQ_OP_DISCARD, /* request to discard sectors */
- REQ_OP_SECURE_ERASE, /* request to securely erase sectors */
- REQ_OP_WRITE_SAME, /* write same block many times */
- REQ_OP_FLUSH, /* request for cache flush */
-};
-
-#define REQ_OP_BITS 3
-
typedef unsigned int blk_qc_t;
#define BLK_QC_T_NONE -1U
#define BLK_QC_T_SHIFT 16
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index adf33079771e740a93630305d229ef7d5578b814..ccd68c0d01de6a01f5bdc95e9507b2da8745183f 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -47,7 +47,6 @@ struct pr_ops;
*/
#define BLKCG_MAX_POLS 2
-struct request;
typedef void (rq_end_io_fn)(struct request *, int);
#define BLK_RL_SYNCFULL (1U << 0)
@@ -1673,7 +1672,7 @@ struct blk_dax_ctl {
struct block_device_operations {
int (*open) (struct block_device *, fmode_t);
void (*release) (struct gendisk *, fmode_t);
- int (*rw_page)(struct block_device *, sector_t, struct page *, int rw);
+ int (*rw_page)(struct block_device *, sector_t, struct page *, int op);
int (*ioctl) (struct block_device *, fmode_t, unsigned, unsigned long);
int (*compat_ioctl) (struct block_device *, fmode_t, unsigned, unsigned long);
long (*direct_access)(struct block_device *, sector_t, void **, pfn_t *,
diff --git a/include/linux/fs.h b/include/linux/fs.h
index f3f0b4c8e8acdec785d8182176e639dd4081bfa1..498255e6914edc41e797852f2e8998b70a503b0c 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -2480,12 +2480,13 @@ extern void init_special_inode(struct inode *, umode_t, dev_t);
extern void make_bad_inode(struct inode *);
extern bool is_bad_inode(struct inode *);
-#ifdef CONFIG_BLOCK
static inline bool op_is_write(unsigned int op)
{
return op == REQ_OP_READ ? false : true;
}
+#ifdef CONFIG_BLOCK
+
/*
* return data direction, READ or WRITE
*/
diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h
index 81363b8349000802940a522703c3c4ab7daef9e7..45786374abbdfb6cc36b3da3abbcc3b7c53f5e0f 100644
--- a/include/linux/pagemap.h
+++ b/include/linux/pagemap.h
@@ -510,7 +510,7 @@ static inline void wait_on_page_writeback(struct page *page)
extern void end_page_writeback(struct page *page);
void wait_for_stable_page(struct page *page);
-void page_endio(struct page *page, int rw, int err);
+void page_endio(struct page *page, int op, int err);
/*
* Add an arbitrary waiter to a page's wait queue
diff --git a/mm/backing-dev.c b/mm/backing-dev.c
index efe2377420744d4d557b801ce4a265d3815cfb8f..8fde443f36d778ffae9e66643387575ce7be9307 100644
--- a/mm/backing-dev.c
+++ b/mm/backing-dev.c
@@ -825,6 +825,20 @@ int bdi_register_dev(struct backing_dev_info *bdi, dev_t dev)
}
EXPORT_SYMBOL(bdi_register_dev);
+int bdi_register_owner(struct backing_dev_info *bdi, struct device *owner)
+{
+ int rc;
+
+ rc = bdi_register(bdi, NULL, "%u:%u", MAJOR(owner->devt),
+ MINOR(owner->devt));
+ if (rc)
+ return rc;
+ bdi->owner = owner;
+ get_device(owner);
+ return 0;
+}
+EXPORT_SYMBOL(bdi_register_owner);
+
/*
* Remove bdi from bdi_list, and ensure that it is no longer visible
*/
@@ -849,6 +863,11 @@ void bdi_unregister(struct backing_dev_info *bdi)
device_unregister(bdi->dev);
bdi->dev = NULL;
}
+
+ if (bdi->owner) {
+ put_device(bdi->owner);
+ bdi->owner = NULL;
+ }
}
void bdi_exit(struct backing_dev_info *bdi)
diff --git a/mm/filemap.c b/mm/filemap.c
index 3083ded98b15f32b68c58d744a5c3abb07d94c96..daef091d4c504430e45cacce7373ab847f1615b1 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -887,9 +887,9 @@ EXPORT_SYMBOL(end_page_writeback);
* After completing I/O on a page, call this routine to update the page
* flags appropriately
*/
-void page_endio(struct page *page, int rw, int err)
+void page_endio(struct page *page, int op, int err)
{
- if (rw == READ) {
+ if (!op_is_write(op)) {
if (!err) {
SetPageUptodate(page);
} else {
@@ -897,7 +897,7 @@ void page_endio(struct page *page, int rw, int err)
SetPageError(page);
}
unlock_page(page);
- } else { /* rw == WRITE */
+ } else {
if (err) {
SetPageError(page);
if (page->mapping)