block, drivers, fs: rename REQ_FLUSH to REQ_PREFLUSH
To avoid confusion between REQ_OP_FLUSH, which is handled by
request_fn drivers, and upper layers requesting the block layer
perform a flush sequence along with possibly a WRITE, this patch
renames REQ_FLUSH to REQ_PREFLUSH.
Signed-off-by: Mike Christie <mchristi@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
diff --git a/Documentation/block/writeback_cache_control.txt b/Documentation/block/writeback_cache_control.txt
index da70bda..8a6bdad 100644
--- a/Documentation/block/writeback_cache_control.txt
+++ b/Documentation/block/writeback_cache_control.txt
@@ -20,11 +20,11 @@
Explicit cache flushes
----------------------
-The REQ_FLUSH flag can be OR ed into the r/w flags of a bio submitted from
+The REQ_PREFLUSH flag can be OR ed into the r/w flags of a bio submitted from
the filesystem and will make sure the volatile cache of the storage device
has been flushed before the actual I/O operation is started. This explicitly
guarantees that previously completed write requests are on non-volatile
-storage before the flagged bio starts. In addition the REQ_FLUSH flag can be
+storage before the flagged bio starts. In addition the REQ_PREFLUSH flag can be
set on an otherwise empty bio structure, which causes only an explicit cache
flush without any dependent I/O. It is recommend to use
the blkdev_issue_flush() helper for a pure cache flush.
@@ -41,21 +41,21 @@
Implementation details for filesystems
--------------------------------------
-Filesystems can simply set the REQ_FLUSH and REQ_FUA bits and do not have to
+Filesystems can simply set the REQ_PREFLUSH and REQ_FUA bits and do not have to
worry if the underlying devices need any explicit cache flushing and how
-the Forced Unit Access is implemented. The REQ_FLUSH and REQ_FUA flags
+the Forced Unit Access is implemented. The REQ_PREFLUSH and REQ_FUA flags
may both be set on a single bio.
Implementation details for make_request_fn based block drivers
--------------------------------------------------------------
-These drivers will always see the REQ_FLUSH and REQ_FUA bits as they sit
+These drivers will always see the REQ_PREFLUSH and REQ_FUA bits as they sit
directly below the submit_bio interface. For remapping drivers the REQ_FUA
bits need to be propagated to underlying devices, and a global flush needs
-to be implemented for bios with the REQ_FLUSH bit set. For real device
-drivers that do not have a volatile cache the REQ_FLUSH and REQ_FUA bits
-on non-empty bios can simply be ignored, and REQ_FLUSH requests without
+to be implemented for bios with the REQ_PREFLUSH bit set. For real device
+drivers that do not have a volatile cache the REQ_PREFLUSH and REQ_FUA bits
+on non-empty bios can simply be ignored, and REQ_PREFLUSH requests without
data can be completed successfully without doing any work. Drivers for
devices with volatile caches need to implement the support for these
flags themselves without any help from the block layer.
@@ -65,8 +65,8 @@
--------------------------------------------------------------
For devices that do not support volatile write caches there is no driver
-support required, the block layer completes empty REQ_FLUSH requests before
-entering the driver and strips off the REQ_FLUSH and REQ_FUA bits from
+support required, the block layer completes empty REQ_PREFLUSH requests before
+entering the driver and strips off the REQ_PREFLUSH and REQ_FUA bits from
requests that have a payload. For devices with volatile write caches the
driver needs to tell the block layer that it supports flushing caches by
doing:
@@ -74,7 +74,7 @@
blk_queue_write_cache(sdkp->disk->queue, true, false);
and handle empty REQ_OP_FLUSH requests in its prep_fn/request_fn. Note that
-REQ_FLUSH requests with a payload are automatically turned into a sequence
+REQ_PREFLUSH requests with a payload are automatically turned into a sequence
of an empty REQ_OP_FLUSH request followed by the actual write by the block
layer. For devices that also support the FUA bit the block layer needs
to be told to pass through the REQ_FUA bit using:
diff --git a/Documentation/device-mapper/log-writes.txt b/Documentation/device-mapper/log-writes.txt
index c10f30c..f4ebcba 100644
--- a/Documentation/device-mapper/log-writes.txt
+++ b/Documentation/device-mapper/log-writes.txt
@@ -14,14 +14,14 @@
We log things in order of completion once we are sure the write is no longer in
cache. This means that normal WRITE requests are not actually logged until the
-next REQ_FLUSH request. This is to make it easier for userspace to replay the
-log in a way that correlates to what is on disk and not what is in cache, to
-make it easier to detect improper waiting/flushing.
+next REQ_PREFLUSH request. This is to make it easier for userspace to replay
+the log in a way that correlates to what is on disk and not what is in cache,
+to make it easier to detect improper waiting/flushing.
This works by attaching all WRITE requests to a list once the write completes.
-Once we see a REQ_FLUSH request we splice this list onto the request and once
+Once we see a REQ_PREFLUSH request we splice this list onto the request and once
the FLUSH request completes we log all of the WRITEs and then the FLUSH. Only
-completed WRITEs, at the time the REQ_FLUSH is issued, are added in order to
+completed WRITEs, at the time the REQ_PREFLUSH is issued, are added in order to
simulate the worst case scenario with regard to power failures. Consider the
following example (W means write, C means complete):
diff --git a/block/blk-core.c b/block/blk-core.c
index c7d66c2..32a283e 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -1029,7 +1029,7 @@
* Flush requests do not use the elevator so skip initialization.
* This allows a request to share the flush and elevator data.
*/
- if (bio->bi_rw & (REQ_FLUSH | REQ_FUA))
+ if (bio->bi_rw & (REQ_PREFLUSH | REQ_FUA))
return false;
return true;
@@ -1736,7 +1736,7 @@
return BLK_QC_T_NONE;
}
- if (bio->bi_rw & (REQ_FLUSH | REQ_FUA)) {
+ if (bio->bi_rw & (REQ_PREFLUSH | REQ_FUA)) {
spin_lock_irq(q->queue_lock);
where = ELEVATOR_INSERT_FLUSH;
goto get_rq;
@@ -1968,9 +1968,9 @@
* drivers without flush support don't have to worry
* about them.
*/
- if ((bio->bi_rw & (REQ_FLUSH | REQ_FUA)) &&
+ if ((bio->bi_rw & (REQ_PREFLUSH | REQ_FUA)) &&
!test_bit(QUEUE_FLAG_WC, &q->queue_flags)) {
- bio->bi_rw &= ~(REQ_FLUSH | REQ_FUA);
+ bio->bi_rw &= ~(REQ_PREFLUSH | REQ_FUA);
if (!nr_sectors) {
err = 0;
goto end_io;
@@ -2217,7 +2217,7 @@
*/
BUG_ON(blk_queued_rq(rq));
- if (rq->cmd_flags & (REQ_FLUSH|REQ_FUA))
+ if (rq->cmd_flags & (REQ_PREFLUSH | REQ_FUA))
where = ELEVATOR_INSERT_FLUSH;
add_acct_request(q, rq, where);
@@ -3311,7 +3311,7 @@
/*
* rq is already accounted, so use raw insert
*/
- if (rq->cmd_flags & (REQ_FLUSH | REQ_FUA))
+ if (rq->cmd_flags & (REQ_PREFLUSH | REQ_FUA))
__elv_add_request(q, rq, ELEVATOR_INSERT_FLUSH);
else
__elv_add_request(q, rq, ELEVATOR_INSERT_SORT_MERGE);
diff --git a/block/blk-flush.c b/block/blk-flush.c
index 21f0d5b..d308def 100644
--- a/block/blk-flush.c
+++ b/block/blk-flush.c
@@ -10,8 +10,8 @@
* optional steps - PREFLUSH, DATA and POSTFLUSH - according to the request
* properties and hardware capability.
*
- * If a request doesn't have data, only REQ_FLUSH makes sense, which
- * indicates a simple flush request. If there is data, REQ_FLUSH indicates
+ * If a request doesn't have data, only REQ_PREFLUSH makes sense, which
+ * indicates a simple flush request. If there is data, REQ_PREFLUSH indicates
* that the device cache should be flushed before the data is executed, and
* REQ_FUA means that the data must be on non-volatile media on request
* completion.
@@ -20,11 +20,11 @@
* difference. The requests are either completed immediately if there's no
* data or executed as normal requests otherwise.
*
- * If the device has writeback cache and supports FUA, REQ_FLUSH is
+ * If the device has writeback cache and supports FUA, REQ_PREFLUSH is
* translated to PREFLUSH but REQ_FUA is passed down directly with DATA.
*
- * If the device has writeback cache and doesn't support FUA, REQ_FLUSH is
- * translated to PREFLUSH and REQ_FUA to POSTFLUSH.
+ * If the device has writeback cache and doesn't support FUA, REQ_PREFLUSH
+ * is translated to PREFLUSH and REQ_FUA to POSTFLUSH.
*
* The actual execution of flush is double buffered. Whenever a request
* needs to execute PRE or POSTFLUSH, it queues at
@@ -103,7 +103,7 @@
policy |= REQ_FSEQ_DATA;
if (fflags & (1UL << QUEUE_FLAG_WC)) {
- if (rq->cmd_flags & REQ_FLUSH)
+ if (rq->cmd_flags & REQ_PREFLUSH)
policy |= REQ_FSEQ_PREFLUSH;
if (!(fflags & (1UL << QUEUE_FLAG_FUA)) &&
(rq->cmd_flags & REQ_FUA))
@@ -391,9 +391,9 @@
/*
* @policy now records what operations need to be done. Adjust
- * REQ_FLUSH and FUA for the driver.
+ * REQ_PREFLUSH and FUA for the driver.
*/
- rq->cmd_flags &= ~REQ_FLUSH;
+ rq->cmd_flags &= ~REQ_PREFLUSH;
if (!(fflags & (1UL << QUEUE_FLAG_FUA)))
rq->cmd_flags &= ~REQ_FUA;
diff --git a/block/blk-mq.c b/block/blk-mq.c
index 29bcd9c..13f4603 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -1247,7 +1247,7 @@
static blk_qc_t blk_mq_make_request(struct request_queue *q, struct bio *bio)
{
const int is_sync = rw_is_sync(bio_op(bio), bio->bi_rw);
- const int is_flush_fua = bio->bi_rw & (REQ_FLUSH | REQ_FUA);
+ const int is_flush_fua = bio->bi_rw & (REQ_PREFLUSH | REQ_FUA);
struct blk_map_ctx data;
struct request *rq;
unsigned int request_count = 0;
@@ -1344,7 +1344,7 @@
static blk_qc_t blk_sq_make_request(struct request_queue *q, struct bio *bio)
{
const int is_sync = rw_is_sync(bio_op(bio), bio->bi_rw);
- const int is_flush_fua = bio->bi_rw & (REQ_FLUSH | REQ_FUA);
+ const int is_flush_fua = bio->bi_rw & (REQ_PREFLUSH | REQ_FUA);
struct blk_plug *plug;
unsigned int request_count = 0;
struct blk_map_ctx data;
diff --git a/drivers/block/drbd/drbd_actlog.c b/drivers/block/drbd/drbd_actlog.c
index f236a31..d524973 100644
--- a/drivers/block/drbd/drbd_actlog.c
+++ b/drivers/block/drbd/drbd_actlog.c
@@ -148,7 +148,7 @@
device->md_io.error = -ENODEV;
if ((op == REQ_OP_WRITE) && !test_bit(MD_NO_FUA, &device->flags))
- op_flags |= REQ_FUA | REQ_FLUSH;
+ op_flags |= REQ_FUA | REQ_PREFLUSH;
op_flags |= REQ_SYNC | REQ_NOIDLE;
bio = bio_alloc_drbd(GFP_NOIO);
@@ -847,7 +847,7 @@
unsigned long count = 0;
sector_t esector, nr_sectors;
- /* This would be an empty REQ_FLUSH, be silent. */
+ /* This would be an empty REQ_PREFLUSH, be silent. */
if ((mode == SET_OUT_OF_SYNC) && size == 0)
return 0;
diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c
index d55febc..2b37744 100644
--- a/drivers/block/drbd/drbd_main.c
+++ b/drivers/block/drbd/drbd_main.c
@@ -1609,7 +1609,7 @@
if (connection->agreed_pro_version >= 95)
return (bio->bi_rw & REQ_SYNC ? DP_RW_SYNC : 0) |
(bio->bi_rw & REQ_FUA ? DP_FUA : 0) |
- (bio->bi_rw & REQ_FLUSH ? DP_FLUSH : 0) |
+ (bio->bi_rw & REQ_PREFLUSH ? DP_FLUSH : 0) |
(bio_op(bio) == REQ_OP_DISCARD ? DP_DISCARD : 0);
else
return bio->bi_rw & REQ_SYNC ? DP_RW_SYNC : 0;
diff --git a/drivers/block/drbd/drbd_protocol.h b/drivers/block/drbd/drbd_protocol.h
index ef92453..129f8c7 100644
--- a/drivers/block/drbd/drbd_protocol.h
+++ b/drivers/block/drbd/drbd_protocol.h
@@ -112,7 +112,7 @@
#define DP_MAY_SET_IN_SYNC 4
#define DP_UNPLUG 8 /* not used anymore */
#define DP_FUA 16 /* equals REQ_FUA */
-#define DP_FLUSH 32 /* equals REQ_FLUSH */
+#define DP_FLUSH 32 /* equals REQ_PREFLUSH */
#define DP_DISCARD 64 /* equals REQ_DISCARD */
#define DP_SEND_RECEIVE_ACK 128 /* This is a proto B write request */
#define DP_SEND_WRITE_ACK 256 /* This is a proto C write request */
diff --git a/drivers/block/drbd/drbd_receiver.c b/drivers/block/drbd/drbd_receiver.c
index 6c59978..1ee0023 100644
--- a/drivers/block/drbd/drbd_receiver.c
+++ b/drivers/block/drbd/drbd_receiver.c
@@ -2158,7 +2158,7 @@
{
return (dpf & DP_RW_SYNC ? REQ_SYNC : 0) |
(dpf & DP_FUA ? REQ_FUA : 0) |
- (dpf & DP_FLUSH ? REQ_FLUSH : 0);
+ (dpf & DP_FLUSH ? REQ_PREFLUSH : 0);
}
static unsigned long wire_flags_to_bio_op(u32 dpf)
diff --git a/drivers/block/drbd/drbd_req.c b/drivers/block/drbd/drbd_req.c
index 2255dcf..eef6e95 100644
--- a/drivers/block/drbd/drbd_req.c
+++ b/drivers/block/drbd/drbd_req.c
@@ -1132,7 +1132,7 @@
* replicating, in which case there is no point. */
if (unlikely(req->i.size == 0)) {
/* The only size==0 bios we expect are empty flushes. */
- D_ASSERT(device, req->master_bio->bi_rw & REQ_FLUSH);
+ D_ASSERT(device, req->master_bio->bi_rw & REQ_PREFLUSH);
if (remote)
_req_mod(req, QUEUE_AS_DRBD_BARRIER);
return remote;
diff --git a/drivers/md/bcache/journal.c b/drivers/md/bcache/journal.c
index a3c3b30..6925023 100644
--- a/drivers/md/bcache/journal.c
+++ b/drivers/md/bcache/journal.c
@@ -631,7 +631,7 @@
bio->bi_end_io = journal_write_endio;
bio->bi_private = w;
bio_set_op_attrs(bio, REQ_OP_WRITE,
- REQ_SYNC|REQ_META|REQ_FLUSH|REQ_FUA);
+ REQ_SYNC|REQ_META|REQ_PREFLUSH|REQ_FUA);
bch_bio_map(bio, w->data);
trace_bcache_journal_write(bio);
diff --git a/drivers/md/bcache/request.c b/drivers/md/bcache/request.c
index 016b0aa..69f16f4 100644
--- a/drivers/md/bcache/request.c
+++ b/drivers/md/bcache/request.c
@@ -205,10 +205,10 @@
return bch_data_invalidate(cl);
/*
- * Journal writes are marked REQ_FLUSH; if the original write was a
+ * Journal writes are marked REQ_PREFLUSH; if the original write was a
* flush, it'll wait on the journal write.
*/
- bio->bi_rw &= ~(REQ_FLUSH|REQ_FUA);
+ bio->bi_rw &= ~(REQ_PREFLUSH|REQ_FUA);
do {
unsigned i;
@@ -668,7 +668,7 @@
s->iop.write_prio = 0;
s->iop.error = 0;
s->iop.flags = 0;
- s->iop.flush_journal = (bio->bi_rw & (REQ_FLUSH|REQ_FUA)) != 0;
+ s->iop.flush_journal = (bio->bi_rw & (REQ_PREFLUSH|REQ_FUA)) != 0;
s->iop.wq = bcache_wq;
return s;
@@ -920,7 +920,7 @@
bch_writeback_add(dc);
s->iop.bio = bio;
- if (bio->bi_rw & REQ_FLUSH) {
+ if (bio->bi_rw & REQ_PREFLUSH) {
/* Also need to send a flush to the backing device */
struct bio *flush = bio_alloc_bioset(GFP_NOIO, 0,
dc->disk.bio_split);
diff --git a/drivers/md/dm-cache-target.c b/drivers/md/dm-cache-target.c
index 540e80e..718744d 100644
--- a/drivers/md/dm-cache-target.c
+++ b/drivers/md/dm-cache-target.c
@@ -788,7 +788,7 @@
spin_lock_irqsave(&cache->lock, flags);
if (cache->need_tick_bio &&
- !(bio->bi_rw & (REQ_FUA | REQ_FLUSH)) &&
+ !(bio->bi_rw & (REQ_FUA | REQ_PREFLUSH)) &&
bio_op(bio) != REQ_OP_DISCARD) {
pb->tick = true;
cache->need_tick_bio = false;
@@ -830,7 +830,7 @@
static int bio_triggers_commit(struct cache *cache, struct bio *bio)
{
- return bio->bi_rw & (REQ_FLUSH | REQ_FUA);
+ return bio->bi_rw & (REQ_PREFLUSH | REQ_FUA);
}
/*
@@ -1069,7 +1069,7 @@
static bool discard_or_flush(struct bio *bio)
{
return bio_op(bio) == REQ_OP_DISCARD ||
- bio->bi_rw & (REQ_FLUSH | REQ_FUA);
+ bio->bi_rw & (REQ_PREFLUSH | REQ_FUA);
}
static void __cell_defer(struct cache *cache, struct dm_bio_prison_cell *cell)
@@ -1614,8 +1614,8 @@
remap_to_cache(cache, bio, 0);
/*
- * REQ_FLUSH is not directed at any particular block so we don't
- * need to inc_ds(). REQ_FUA's are split into a write + REQ_FLUSH
+ * REQ_PREFLUSH is not directed at any particular block so we don't
+ * need to inc_ds(). REQ_FUA's are split into a write + REQ_PREFLUSH
* by dm-core.
*/
issue(cache, bio);
@@ -1980,7 +1980,7 @@
bio = bio_list_pop(&bios);
- if (bio->bi_rw & REQ_FLUSH)
+ if (bio->bi_rw & REQ_PREFLUSH)
process_flush_bio(cache, bio);
else if (bio_op(bio) == REQ_OP_DISCARD)
process_discard_bio(cache, &structs, bio);
diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c
index 057d19b..96dd5d7 100644
--- a/drivers/md/dm-crypt.c
+++ b/drivers/md/dm-crypt.c
@@ -1911,11 +1911,12 @@
struct crypt_config *cc = ti->private;
/*
- * If bio is REQ_FLUSH or REQ_OP_DISCARD, just bypass crypt queues.
- * - for REQ_FLUSH device-mapper core ensures that no IO is in-flight
+ * If bio is REQ_PREFLUSH or REQ_OP_DISCARD, just bypass crypt queues.
+ * - for REQ_PREFLUSH device-mapper core ensures that no IO is in-flight
* - for REQ_OP_DISCARD caller must use flush if IO ordering matters
*/
- if (unlikely(bio->bi_rw & REQ_FLUSH || bio_op(bio) == REQ_OP_DISCARD)) {
+ if (unlikely(bio->bi_rw & REQ_PREFLUSH ||
+ bio_op(bio) == REQ_OP_DISCARD)) {
bio->bi_bdev = cc->dev->bdev;
if (bio_sectors(bio))
bio->bi_iter.bi_sector = cc->start +
diff --git a/drivers/md/dm-era-target.c b/drivers/md/dm-era-target.c
index 665bf32..2faf49d8 100644
--- a/drivers/md/dm-era-target.c
+++ b/drivers/md/dm-era-target.c
@@ -1540,9 +1540,9 @@
remap_to_origin(era, bio);
/*
- * REQ_FLUSH bios carry no data, so we're not interested in them.
+ * REQ_PREFLUSH bios carry no data, so we're not interested in them.
*/
- if (!(bio->bi_rw & REQ_FLUSH) &&
+ if (!(bio->bi_rw & REQ_PREFLUSH) &&
(bio_data_dir(bio) == WRITE) &&
!metadata_current_marked(era->md, block)) {
defer_bio(era, bio);
diff --git a/drivers/md/dm-io.c b/drivers/md/dm-io.c
index 22e0597..0e225fd 100644
--- a/drivers/md/dm-io.c
+++ b/drivers/md/dm-io.c
@@ -380,7 +380,7 @@
*/
for (i = 0; i < num_regions; i++) {
*dp = old_pages;
- if (where[i].count || (op_flags & REQ_FLUSH))
+ if (where[i].count || (op_flags & REQ_PREFLUSH))
do_region(op, op_flags, i, where + i, dp, io);
}
diff --git a/drivers/md/dm-log-writes.c b/drivers/md/dm-log-writes.c
index 0edb8ea..b5dbf7a 100644
--- a/drivers/md/dm-log-writes.c
+++ b/drivers/md/dm-log-writes.c
@@ -555,7 +555,7 @@
struct bio_vec bv;
size_t alloc_size;
int i = 0;
- bool flush_bio = (bio->bi_rw & REQ_FLUSH);
+ bool flush_bio = (bio->bi_rw & REQ_PREFLUSH);
bool fua_bio = (bio->bi_rw & REQ_FUA);
bool discard_bio = (bio_op(bio) == REQ_OP_DISCARD);
diff --git a/drivers/md/dm-raid1.c b/drivers/md/dm-raid1.c
index 907df2b..9f5f460 100644
--- a/drivers/md/dm-raid1.c
+++ b/drivers/md/dm-raid1.c
@@ -704,7 +704,7 @@
bio_list_init(&requeue);
while ((bio = bio_list_pop(writes))) {
- if ((bio->bi_rw & REQ_FLUSH) ||
+ if ((bio->bi_rw & REQ_PREFLUSH) ||
(bio_op(bio) == REQ_OP_DISCARD)) {
bio_list_add(&sync, bio);
continue;
@@ -1253,7 +1253,8 @@
* We need to dec pending if this was a write.
*/
if (rw == WRITE) {
- if (!(bio->bi_rw & REQ_FLUSH) && bio_op(bio) != REQ_OP_DISCARD)
+ if (!(bio->bi_rw & REQ_PREFLUSH) &&
+ bio_op(bio) != REQ_OP_DISCARD)
dm_rh_dec(ms->rh, bio_record->write_region);
return error;
}
diff --git a/drivers/md/dm-region-hash.c b/drivers/md/dm-region-hash.c
index 3550ca7..b118134 100644
--- a/drivers/md/dm-region-hash.c
+++ b/drivers/md/dm-region-hash.c
@@ -398,7 +398,7 @@
region_t region = dm_rh_bio_to_region(rh, bio);
int recovering = 0;
- if (bio->bi_rw & REQ_FLUSH) {
+ if (bio->bi_rw & REQ_PREFLUSH) {
rh->flush_failure = 1;
return;
}
@@ -526,7 +526,7 @@
struct bio *bio;
for (bio = bios->head; bio; bio = bio->bi_next) {
- if (bio->bi_rw & REQ_FLUSH || bio_op(bio) == REQ_OP_DISCARD)
+ if (bio->bi_rw & REQ_PREFLUSH || bio_op(bio) == REQ_OP_DISCARD)
continue;
rh_inc(rh, dm_rh_bio_to_region(rh, bio));
}
diff --git a/drivers/md/dm-snap.c b/drivers/md/dm-snap.c
index 70bb0e8..69ab1ff 100644
--- a/drivers/md/dm-snap.c
+++ b/drivers/md/dm-snap.c
@@ -1680,7 +1680,7 @@
init_tracked_chunk(bio);
- if (bio->bi_rw & REQ_FLUSH) {
+ if (bio->bi_rw & REQ_PREFLUSH) {
bio->bi_bdev = s->cow->bdev;
return DM_MAPIO_REMAPPED;
}
@@ -1799,7 +1799,7 @@
init_tracked_chunk(bio);
- if (bio->bi_rw & REQ_FLUSH) {
+ if (bio->bi_rw & REQ_PREFLUSH) {
if (!dm_bio_get_target_bio_nr(bio))
bio->bi_bdev = s->origin->bdev;
else
@@ -2285,7 +2285,7 @@
bio->bi_bdev = o->dev->bdev;
- if (unlikely(bio->bi_rw & REQ_FLUSH))
+ if (unlikely(bio->bi_rw & REQ_PREFLUSH))
return DM_MAPIO_REMAPPED;
if (bio_rw(bio) != WRITE)
diff --git a/drivers/md/dm-stripe.c b/drivers/md/dm-stripe.c
index b738178..48f1c01 100644
--- a/drivers/md/dm-stripe.c
+++ b/drivers/md/dm-stripe.c
@@ -286,7 +286,7 @@
uint32_t stripe;
unsigned target_bio_nr;
- if (bio->bi_rw & REQ_FLUSH) {
+ if (bio->bi_rw & REQ_PREFLUSH) {
target_bio_nr = dm_bio_get_target_bio_nr(bio);
BUG_ON(target_bio_nr >= sc->stripes);
bio->bi_bdev = sc->stripe[target_bio_nr].dev->bdev;
diff --git a/drivers/md/dm-thin.c b/drivers/md/dm-thin.c
index 1b684cb..5f9e3d7 100644
--- a/drivers/md/dm-thin.c
+++ b/drivers/md/dm-thin.c
@@ -697,7 +697,7 @@
static int bio_triggers_commit(struct thin_c *tc, struct bio *bio)
{
- return (bio->bi_rw & (REQ_FLUSH | REQ_FUA)) &&
+ return (bio->bi_rw & (REQ_PREFLUSH | REQ_FUA)) &&
dm_thin_changed_this_transaction(tc->td);
}
@@ -868,7 +868,7 @@
struct bio *bio;
while ((bio = bio_list_pop(&cell->bios))) {
- if (bio->bi_rw & (REQ_FLUSH | REQ_FUA) ||
+ if (bio->bi_rw & (REQ_PREFLUSH | REQ_FUA) ||
bio_op(bio) == REQ_OP_DISCARD)
bio_list_add(&info->defer_bios, bio);
else {
@@ -1641,7 +1641,7 @@
while ((bio = bio_list_pop(&cell->bios))) {
if ((bio_data_dir(bio) == WRITE) ||
- (bio->bi_rw & (REQ_FLUSH | REQ_FUA) ||
+ (bio->bi_rw & (REQ_PREFLUSH | REQ_FUA) ||
bio_op(bio) == REQ_OP_DISCARD))
bio_list_add(&info->defer_bios, bio);
else {
@@ -2556,7 +2556,7 @@
return DM_MAPIO_SUBMITTED;
}
- if (bio->bi_rw & (REQ_FLUSH | REQ_FUA) ||
+ if (bio->bi_rw & (REQ_PREFLUSH | REQ_FUA) ||
bio_op(bio) == REQ_OP_DISCARD) {
thin_defer_bio_with_throttle(tc, bio);
return DM_MAPIO_SUBMITTED;
diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index fcc68c8..aba7ed9 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -1003,12 +1003,12 @@
if (io_error == DM_ENDIO_REQUEUE)
return;
- if ((bio->bi_rw & REQ_FLUSH) && bio->bi_iter.bi_size) {
+ if ((bio->bi_rw & REQ_PREFLUSH) && bio->bi_iter.bi_size) {
/*
* Preflush done for flush with data, reissue
- * without REQ_FLUSH.
+ * without REQ_PREFLUSH.
*/
- bio->bi_rw &= ~REQ_FLUSH;
+ bio->bi_rw &= ~REQ_PREFLUSH;
queue_io(md, bio);
} else {
/* done with normal IO or empty flush */
@@ -1477,7 +1477,7 @@
/*
* A target may call dm_accept_partial_bio only from the map routine. It is
- * allowed for all bio types except REQ_FLUSH.
+ * allowed for all bio types except REQ_PREFLUSH.
*
* dm_accept_partial_bio informs the dm that the target only wants to process
* additional n_sectors sectors of the bio and the rest of the data should be
@@ -1507,7 +1507,7 @@
{
struct dm_target_io *tio = container_of(bio, struct dm_target_io, clone);
unsigned bi_size = bio->bi_iter.bi_size >> SECTOR_SHIFT;
- BUG_ON(bio->bi_rw & REQ_FLUSH);
+ BUG_ON(bio->bi_rw & REQ_PREFLUSH);
BUG_ON(bi_size > *tio->len_ptr);
BUG_ON(n_sectors > bi_size);
*tio->len_ptr -= bi_size - n_sectors;
@@ -1795,7 +1795,7 @@
start_io_acct(ci.io);
- if (bio->bi_rw & REQ_FLUSH) {
+ if (bio->bi_rw & REQ_PREFLUSH) {
ci.bio = &ci.md->flush_bio;
ci.sector_count = 0;
error = __send_empty_flush(&ci);
diff --git a/drivers/md/linear.c b/drivers/md/linear.c
index 1ad3f48..70ff888 100644
--- a/drivers/md/linear.c
+++ b/drivers/md/linear.c
@@ -221,7 +221,7 @@
struct bio *split;
sector_t start_sector, end_sector, data_offset;
- if (unlikely(bio->bi_rw & REQ_FLUSH)) {
+ if (unlikely(bio->bi_rw & REQ_PREFLUSH)) {
md_flush_request(mddev, bio);
return;
}
diff --git a/drivers/md/md.c b/drivers/md/md.c
index bd4844f..1f123f5 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -414,7 +414,7 @@
/* an empty barrier - all done */
bio_endio(bio);
else {
- bio->bi_rw &= ~REQ_FLUSH;
+ bio->bi_rw &= ~REQ_PREFLUSH;
mddev->pers->make_request(mddev, bio);
}
diff --git a/drivers/md/md.h b/drivers/md/md.h
index 2e0918f..b4f3352 100644
--- a/drivers/md/md.h
+++ b/drivers/md/md.h
@@ -424,7 +424,7 @@
/* Generic flush handling.
* The last to finish preflush schedules a worker to submit
- * the rest of the request (without the REQ_FLUSH flag).
+ * the rest of the request (without the REQ_PREFLUSH flag).
*/
struct bio *flush_bio;
atomic_t flush_pending;
diff --git a/drivers/md/multipath.c b/drivers/md/multipath.c
index dd483bb..72ea98e 100644
--- a/drivers/md/multipath.c
+++ b/drivers/md/multipath.c
@@ -111,7 +111,7 @@
struct multipath_bh * mp_bh;
struct multipath_info *multipath;
- if (unlikely(bio->bi_rw & REQ_FLUSH)) {
+ if (unlikely(bio->bi_rw & REQ_PREFLUSH)) {
md_flush_request(mddev, bio);
return;
}
diff --git a/drivers/md/raid0.c b/drivers/md/raid0.c
index 051a10c..c3d4390 100644
--- a/drivers/md/raid0.c
+++ b/drivers/md/raid0.c
@@ -458,7 +458,7 @@
struct md_rdev *tmp_dev;
struct bio *split;
- if (unlikely(bio->bi_rw & REQ_FLUSH)) {
+ if (unlikely(bio->bi_rw & REQ_PREFLUSH)) {
md_flush_request(mddev, bio);
return;
}
diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index a342723..10e53cd 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -1056,7 +1056,8 @@
const int op = bio_op(bio);
const int rw = bio_data_dir(bio);
const unsigned long do_sync = (bio->bi_rw & REQ_SYNC);
- const unsigned long do_flush_fua = (bio->bi_rw & (REQ_FLUSH | REQ_FUA));
+ const unsigned long do_flush_fua = (bio->bi_rw &
+ (REQ_PREFLUSH | REQ_FUA));
const unsigned long do_sec = (bio->bi_rw & REQ_SECURE);
struct md_rdev *blocked_rdev;
struct blk_plug_cb *cb;
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index 615045a..245640b 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -1447,7 +1447,7 @@
struct bio *split;
- if (unlikely(bio->bi_rw & REQ_FLUSH)) {
+ if (unlikely(bio->bi_rw & REQ_PREFLUSH)) {
md_flush_request(mddev, bio);
return;
}
diff --git a/drivers/md/raid5-cache.c b/drivers/md/raid5-cache.c
index 9265138..5504ce2 100644
--- a/drivers/md/raid5-cache.c
+++ b/drivers/md/raid5-cache.c
@@ -536,7 +536,7 @@
bio_endio(bio);
return 0;
}
- bio->bi_rw &= ~REQ_FLUSH;
+ bio->bi_rw &= ~REQ_PREFLUSH;
return -EAGAIN;
}
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index b9122e2..7aacf5b 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -5150,7 +5150,7 @@
DEFINE_WAIT(w);
bool do_prepare;
- if (unlikely(bi->bi_rw & REQ_FLUSH)) {
+ if (unlikely(bi->bi_rw & REQ_PREFLUSH)) {
int ret = r5l_handle_flush_request(conf->log, bi);
if (ret == 0)
diff --git a/fs/btrfs/check-integrity.c b/fs/btrfs/check-integrity.c
index da944ff..ca70bc7 100644
--- a/fs/btrfs/check-integrity.c
+++ b/fs/btrfs/check-integrity.c
@@ -2207,7 +2207,7 @@
block->dev_bytenr, block->mirror_num);
next_block = block->next_in_same_bio;
block->iodone_w_error = iodone_w_error;
- if (block->submit_bio_bh_rw & REQ_FLUSH) {
+ if (block->submit_bio_bh_rw & REQ_PREFLUSH) {
dev_state->last_flush_gen++;
if ((dev_state->state->print_mask &
BTRFSIC_PRINT_MASK_END_IO_BIO_BH))
@@ -2243,7 +2243,7 @@
block->dev_bytenr, block->mirror_num);
block->iodone_w_error = iodone_w_error;
- if (block->submit_bio_bh_rw & REQ_FLUSH) {
+ if (block->submit_bio_bh_rw & REQ_PREFLUSH) {
dev_state->last_flush_gen++;
if ((dev_state->state->print_mask &
BTRFSIC_PRINT_MASK_END_IO_BIO_BH))
@@ -2884,7 +2884,7 @@
btrfsic_process_written_block(dev_state, dev_bytenr,
&bh->b_data, 1, NULL,
NULL, bh, op_flags);
- } else if (NULL != dev_state && (op_flags & REQ_FLUSH)) {
+ } else if (NULL != dev_state && (op_flags & REQ_PREFLUSH)) {
if (dev_state->state->print_mask &
BTRFSIC_PRINT_MASK_SUBMIT_BIO_BH)
printk(KERN_INFO
@@ -2982,7 +2982,7 @@
kunmap(bio->bi_io_vec[i].bv_page);
}
kfree(mapped_datav);
- } else if (NULL != dev_state && (bio->bi_rw & REQ_FLUSH)) {
+ } else if (NULL != dev_state && (bio->bi_rw & REQ_PREFLUSH)) {
if (dev_state->state->print_mask &
BTRFSIC_PRINT_MASK_SUBMIT_BIO_BH)
printk(KERN_INFO
diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c
index 34bc996..dc68f56 100644
--- a/fs/jbd2/journal.c
+++ b/fs/jbd2/journal.c
@@ -1354,7 +1354,7 @@
trace_jbd2_write_superblock(journal, write_flags);
if (!(journal->j_flags & JBD2_BARRIER))
- write_flags &= ~(REQ_FUA | REQ_FLUSH);
+ write_flags &= ~(REQ_FUA | REQ_PREFLUSH);
lock_buffer(bh);
if (buffer_write_io_error(bh)) {
/*
diff --git a/fs/xfs/xfs_buf.c b/fs/xfs/xfs_buf.c
index d8acd37..686d8f1 100644
--- a/fs/xfs/xfs_buf.c
+++ b/fs/xfs/xfs_buf.c
@@ -1237,7 +1237,7 @@
if (bp->b_flags & XBF_FUA)
op_flags |= REQ_FUA;
if (bp->b_flags & XBF_FLUSH)
- op_flags |= REQ_FLUSH;
+ op_flags |= REQ_PREFLUSH;
/*
* Run the write verifier callback function if it exists. If
diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h
index 32d8752..562ab83 100644
--- a/include/linux/blk_types.h
+++ b/include/linux/blk_types.h
@@ -168,7 +168,7 @@
__REQ_NOIDLE, /* don't anticipate more IO after this one */
__REQ_INTEGRITY, /* I/O includes block integrity payload */
__REQ_FUA, /* forced unit access */
- __REQ_FLUSH, /* request for cache flush */
+ __REQ_PREFLUSH, /* request for cache flush */
/* bio only flags */
__REQ_RAHEAD, /* read ahead, can fail anytime */
@@ -212,12 +212,12 @@
(REQ_FAILFAST_DEV | REQ_FAILFAST_TRANSPORT | REQ_FAILFAST_DRIVER)
#define REQ_COMMON_MASK \
(REQ_FAILFAST_MASK | REQ_SYNC | REQ_META | REQ_PRIO | REQ_NOIDLE | \
- REQ_FLUSH | REQ_FUA | REQ_SECURE | REQ_INTEGRITY | REQ_NOMERGE)
+ REQ_PREFLUSH | REQ_FUA | REQ_SECURE | REQ_INTEGRITY | REQ_NOMERGE)
#define REQ_CLONE_MASK REQ_COMMON_MASK
/* This mask is used for both bio and request merge checking */
#define REQ_NOMERGE_FLAGS \
- (REQ_NOMERGE | REQ_STARTED | REQ_SOFTBARRIER | REQ_FLUSH | REQ_FUA | REQ_FLUSH_SEQ)
+ (REQ_NOMERGE | REQ_STARTED | REQ_SOFTBARRIER | REQ_PREFLUSH | REQ_FUA | REQ_FLUSH_SEQ)
#define REQ_RAHEAD (1ULL << __REQ_RAHEAD)
#define REQ_THROTTLED (1ULL << __REQ_THROTTLED)
@@ -235,7 +235,7 @@
#define REQ_PREEMPT (1ULL << __REQ_PREEMPT)
#define REQ_ALLOCED (1ULL << __REQ_ALLOCED)
#define REQ_COPY_USER (1ULL << __REQ_COPY_USER)
-#define REQ_FLUSH (1ULL << __REQ_FLUSH)
+#define REQ_PREFLUSH (1ULL << __REQ_PREFLUSH)
#define REQ_FLUSH_SEQ (1ULL << __REQ_FLUSH_SEQ)
#define REQ_IO_STAT (1ULL << __REQ_IO_STAT)
#define REQ_MIXED_MERGE (1ULL << __REQ_MIXED_MERGE)
diff --git a/include/linux/fs.h b/include/linux/fs.h
index ccd1664..1830245 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -204,9 +204,9 @@
#define READ_SYNC REQ_SYNC
#define WRITE_SYNC (REQ_SYNC | REQ_NOIDLE)
#define WRITE_ODIRECT REQ_SYNC
-#define WRITE_FLUSH (REQ_SYNC | REQ_NOIDLE | REQ_FLUSH)
+#define WRITE_FLUSH (REQ_SYNC | REQ_NOIDLE | REQ_PREFLUSH)
#define WRITE_FUA (REQ_SYNC | REQ_NOIDLE | REQ_FUA)
-#define WRITE_FLUSH_FUA (REQ_SYNC | REQ_NOIDLE | REQ_FLUSH | REQ_FUA)
+#define WRITE_FLUSH_FUA (REQ_SYNC | REQ_NOIDLE | REQ_PREFLUSH | REQ_FUA)
/*
* Attribute flags. These should be or-ed together to figure out what
diff --git a/include/trace/events/f2fs.h b/include/trace/events/f2fs.h
index 30efa44..878963a 100644
--- a/include/trace/events/f2fs.h
+++ b/include/trace/events/f2fs.h
@@ -33,7 +33,7 @@
TRACE_DEFINE_ENUM(__REQ_RAHEAD);
TRACE_DEFINE_ENUM(__REQ_SYNC);
TRACE_DEFINE_ENUM(__REQ_NOIDLE);
-TRACE_DEFINE_ENUM(__REQ_FLUSH);
+TRACE_DEFINE_ENUM(__REQ_PREFLUSH);
TRACE_DEFINE_ENUM(__REQ_FUA);
TRACE_DEFINE_ENUM(__REQ_PRIO);
TRACE_DEFINE_ENUM(__REQ_META);
diff --git a/kernel/trace/blktrace.c b/kernel/trace/blktrace.c
index 0c70fbb..03b0dd9 100644
--- a/kernel/trace/blktrace.c
+++ b/kernel/trace/blktrace.c
@@ -189,6 +189,7 @@
BLK_TC_ACT(BLK_TC_WRITE) };
#define BLK_TC_RAHEAD BLK_TC_AHEAD
+#define BLK_TC_PREFLUSH BLK_TC_FLUSH
/* The ilog2() calls fall out because they're constant */
#define MASK_TC_BIT(rw, __name) ((rw & REQ_ ## __name) << \
@@ -219,7 +220,7 @@
what |= MASK_TC_BIT(op_flags, SYNC);
what |= MASK_TC_BIT(op_flags, RAHEAD);
what |= MASK_TC_BIT(op_flags, META);
- what |= MASK_TC_BIT(op_flags, FLUSH);
+ what |= MASK_TC_BIT(op_flags, PREFLUSH);
what |= MASK_TC_BIT(op_flags, FUA);
if (op == REQ_OP_DISCARD)
what |= BLK_TC_ACT(BLK_TC_DISCARD);
@@ -1779,7 +1780,7 @@
{
int i = 0;
- if (rw & REQ_FLUSH)
+ if (rw & REQ_PREFLUSH)
rwbs[i++] = 'F';
switch (op) {