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authorLinus Torvalds <torvalds@linux-foundation.org>2014-01-30 11:19:05 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2014-01-30 11:19:05 -0800
commitf568849edac8611d603e00bd6cbbcfea09395ae6 (patch)
treeb9472d640fe5d87426d38c9d81d946cf197ad3fb /block
parentd9894c228b11273e720bb63ba120d1d326fe9d94 (diff)
parent675675ada486dde5bf9aa51665e90706bff11a35 (diff)
downloadlinux-f568849edac8611d603e00bd6cbbcfea09395ae6.tar.gz
Merge branch 'for-3.14/core' of git://git.kernel.dk/linux-block
Pull core block IO changes from Jens Axboe: "The major piece in here is the immutable bio_ve series from Kent, the rest is fairly minor. It was supposed to go in last round, but various issues pushed it to this release instead. The pull request contains: - Various smaller blk-mq fixes from different folks. Nothing major here, just minor fixes and cleanups. - Fix for a memory leak in the error path in the block ioctl code from Christian Engelmayer. - Header export fix from CaiZhiyong. - Finally the immutable biovec changes from Kent Overstreet. This enables some nice future work on making arbitrarily sized bios possible, and splitting more efficient. Related fixes to immutable bio_vecs: - dm-cache immutable fixup from Mike Snitzer. - btrfs immutable fixup from Muthu Kumar. - bio-integrity fix from Nic Bellinger, which is also going to stable" * 'for-3.14/core' of git://git.kernel.dk/linux-block: (44 commits) xtensa: fixup simdisk driver to work with immutable bio_vecs block/blk-mq-cpu.c: use hotcpu_notifier() blk-mq: for_each_* macro correctness block: Fix memory leak in rw_copy_check_uvector() handling bio-integrity: Fix bio_integrity_verify segment start bug block: remove unrelated header files and export symbol blk-mq: uses page->list incorrectly blk-mq: use __smp_call_function_single directly btrfs: fix missing increment of bi_remaining Revert "block: Warn and free bio if bi_end_io is not set" block: Warn and free bio if bi_end_io is not set blk-mq: fix initializing request's start time block: blk-mq: don't export blk_mq_free_queue() block: blk-mq: make blk_sync_queue support mq block: blk-mq: support draining mq queue dm cache: increment bi_remaining when bi_end_io is restored block: fixup for generic bio chaining block: Really silence spurious compiler warnings block: Silence spurious compiler warnings block: Kill bio_pair_split() ...
Diffstat (limited to 'block')
-rw-r--r--block/blk-core.c61
-rw-r--r--block/blk-exec.c4
-rw-r--r--block/blk-flush.c2
-rw-r--r--block/blk-integrity.c40
-rw-r--r--block/blk-lib.c12
-rw-r--r--block/blk-map.c6
-rw-r--r--block/blk-merge.c66
-rw-r--r--block/blk-mq-cpu.c37
-rw-r--r--block/blk-mq.c123
-rw-r--r--block/blk-mq.h3
-rw-r--r--block/blk-sysfs.c1
-rw-r--r--block/blk-throttle.c14
-rw-r--r--block/cmdline-parser.c18
-rw-r--r--block/elevator.c2
-rw-r--r--block/scsi_ioctl.c6
15 files changed, 181 insertions, 214 deletions
diff --git a/block/blk-core.c b/block/blk-core.c
index 8bdd0121212..c00e0bdeab4 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -38,6 +38,7 @@
#include "blk.h"
#include "blk-cgroup.h"
+#include "blk-mq.h"
EXPORT_TRACEPOINT_SYMBOL_GPL(block_bio_remap);
EXPORT_TRACEPOINT_SYMBOL_GPL(block_rq_remap);
@@ -130,7 +131,7 @@ static void req_bio_endio(struct request *rq, struct bio *bio,
bio_advance(bio, nbytes);
/* don't actually finish bio if it's part of flush sequence */
- if (bio->bi_size == 0 && !(rq->cmd_flags & REQ_FLUSH_SEQ))
+ if (bio->bi_iter.bi_size == 0 && !(rq->cmd_flags & REQ_FLUSH_SEQ))
bio_endio(bio, error);
}
@@ -245,7 +246,16 @@ EXPORT_SYMBOL(blk_stop_queue);
void blk_sync_queue(struct request_queue *q)
{
del_timer_sync(&q->timeout);
- cancel_delayed_work_sync(&q->delay_work);
+
+ if (q->mq_ops) {
+ struct blk_mq_hw_ctx *hctx;
+ int i;
+
+ queue_for_each_hw_ctx(q, hctx, i)
+ cancel_delayed_work_sync(&hctx->delayed_work);
+ } else {
+ cancel_delayed_work_sync(&q->delay_work);
+ }
}
EXPORT_SYMBOL(blk_sync_queue);
@@ -497,8 +507,13 @@ void blk_cleanup_queue(struct request_queue *q)
* Drain all requests queued before DYING marking. Set DEAD flag to
* prevent that q->request_fn() gets invoked after draining finished.
*/
- spin_lock_irq(lock);
- __blk_drain_queue(q, true);
+ if (q->mq_ops) {
+ blk_mq_drain_queue(q);
+ spin_lock_irq(lock);
+ } else {
+ spin_lock_irq(lock);
+ __blk_drain_queue(q, true);
+ }
queue_flag_set(QUEUE_FLAG_DEAD, q);
spin_unlock_irq(lock);
@@ -1326,7 +1341,7 @@ void blk_add_request_payload(struct request *rq, struct page *page,
bio->bi_io_vec->bv_offset = 0;
bio->bi_io_vec->bv_len = len;
- bio->bi_size = len;
+ bio->bi_iter.bi_size = len;
bio->bi_vcnt = 1;
bio->bi_phys_segments = 1;
@@ -1351,7 +1366,7 @@ bool bio_attempt_back_merge(struct request_queue *q, struct request *req,
req->biotail->bi_next = bio;
req->biotail = bio;
- req->__data_len += bio->bi_size;
+ req->__data_len += bio->bi_iter.bi_size;
req->ioprio = ioprio_best(req->ioprio, bio_prio(bio));
blk_account_io_start(req, false);
@@ -1380,8 +1395,8 @@ bool bio_attempt_front_merge(struct request_queue *q, struct request *req,
* not touch req->buffer either...
*/
req->buffer = bio_data(bio);
- req->__sector = bio->bi_sector;
- req->__data_len += bio->bi_size;
+ req->__sector = bio->bi_iter.bi_sector;
+ req->__data_len += bio->bi_iter.bi_size;
req->ioprio = ioprio_best(req->ioprio, bio_prio(bio));
blk_account_io_start(req, false);
@@ -1459,7 +1474,7 @@ void init_request_from_bio(struct request *req, struct bio *bio)
req->cmd_flags |= REQ_FAILFAST_MASK;
req->errors = 0;
- req->__sector = bio->bi_sector;
+ req->__sector = bio->bi_iter.bi_sector;
req->ioprio = bio_prio(bio);
blk_rq_bio_prep(req->q, req, bio);
}
@@ -1583,12 +1598,12 @@ static inline void blk_partition_remap(struct bio *bio)
if (bio_sectors(bio) && bdev != bdev->bd_contains) {
struct hd_struct *p = bdev->bd_part;
- bio->bi_sector += p->start_sect;
+ bio->bi_iter.bi_sector += p->start_sect;
bio->bi_bdev = bdev->bd_contains;
trace_block_bio_remap(bdev_get_queue(bio->bi_bdev), bio,
bdev->bd_dev,
- bio->bi_sector - p->start_sect);
+ bio->bi_iter.bi_sector - p->start_sect);
}
}
@@ -1654,7 +1669,7 @@ static inline int bio_check_eod(struct bio *bio, unsigned int nr_sectors)
/* Test device or partition size, when known. */
maxsector = i_size_read(bio->bi_bdev->bd_inode) >> 9;
if (maxsector) {
- sector_t sector = bio->bi_sector;
+ sector_t sector = bio->bi_iter.bi_sector;
if (maxsector < nr_sectors || maxsector - nr_sectors < sector) {
/*
@@ -1690,7 +1705,7 @@ generic_make_request_checks(struct bio *bio)
"generic_make_request: Trying to access "
"nonexistent block-device %s (%Lu)\n",
bdevname(bio->bi_bdev, b),
- (long long) bio->bi_sector);
+ (long long) bio->bi_iter.bi_sector);
goto end_io;
}
@@ -1704,9 +1719,9 @@ generic_make_request_checks(struct bio *bio)
}
part = bio->bi_bdev->bd_part;
- if (should_fail_request(part, bio->bi_size) ||
+ if (should_fail_request(part, bio->bi_iter.bi_size) ||
should_fail_request(&part_to_disk(part)->part0,
- bio->bi_size))
+ bio->bi_iter.bi_size))
goto end_io;
/*
@@ -1865,7 +1880,7 @@ void submit_bio(int rw, struct bio *bio)
if (rw & WRITE) {
count_vm_events(PGPGOUT, count);
} else {
- task_io_account_read(bio->bi_size);
+ task_io_account_read(bio->bi_iter.bi_size);
count_vm_events(PGPGIN, count);
}
@@ -1874,7 +1889,7 @@ void submit_bio(int rw, struct bio *bio)
printk(KERN_DEBUG "%s(%d): %s block %Lu on %s (%u sectors)\n",
current->comm, task_pid_nr(current),
(rw & WRITE) ? "WRITE" : "READ",
- (unsigned long long)bio->bi_sector,
+ (unsigned long long)bio->bi_iter.bi_sector,
bdevname(bio->bi_bdev, b),
count);
}
@@ -2007,7 +2022,7 @@ unsigned int blk_rq_err_bytes(const struct request *rq)
for (bio = rq->bio; bio; bio = bio->bi_next) {
if ((bio->bi_rw & ff) != ff)
break;
- bytes += bio->bi_size;
+ bytes += bio->bi_iter.bi_size;
}
/* this could lead to infinite loop */
@@ -2378,9 +2393,9 @@ bool blk_update_request(struct request *req, int error, unsigned int nr_bytes)
total_bytes = 0;
while (req->bio) {
struct bio *bio = req->bio;
- unsigned bio_bytes = min(bio->bi_size, nr_bytes);
+ unsigned bio_bytes = min(bio->bi_iter.bi_size, nr_bytes);
- if (bio_bytes == bio->bi_size)
+ if (bio_bytes == bio->bi_iter.bi_size)
req->bio = bio->bi_next;
req_bio_endio(req, bio, bio_bytes, error);
@@ -2728,7 +2743,7 @@ void blk_rq_bio_prep(struct request_queue *q, struct request *rq,
rq->nr_phys_segments = bio_phys_segments(q, bio);
rq->buffer = bio_data(bio);
}
- rq->__data_len = bio->bi_size;
+ rq->__data_len = bio->bi_iter.bi_size;
rq->bio = rq->biotail = bio;
if (bio->bi_bdev)
@@ -2746,10 +2761,10 @@ void blk_rq_bio_prep(struct request_queue *q, struct request *rq,
void rq_flush_dcache_pages(struct request *rq)
{
struct req_iterator iter;
- struct bio_vec *bvec;
+ struct bio_vec bvec;
rq_for_each_segment(bvec, rq, iter)
- flush_dcache_page(bvec->bv_page);
+ flush_dcache_page(bvec.bv_page);
}
EXPORT_SYMBOL_GPL(rq_flush_dcache_pages);
#endif
diff --git a/block/blk-exec.c b/block/blk-exec.c
index c3edf9dff56..bbfc072a79c 100644
--- a/block/blk-exec.c
+++ b/block/blk-exec.c
@@ -60,6 +60,10 @@ void blk_execute_rq_nowait(struct request_queue *q, struct gendisk *bd_disk,
rq->rq_disk = bd_disk;
rq->end_io = done;
+ /*
+ * don't check dying flag for MQ because the request won't
+ * be resued after dying flag is set
+ */
if (q->mq_ops) {
blk_mq_insert_request(q, rq, true);
return;
diff --git a/block/blk-flush.c b/block/blk-flush.c
index fb6f3c0ffa4..9288aaf35c2 100644
--- a/block/blk-flush.c
+++ b/block/blk-flush.c
@@ -548,7 +548,7 @@ int blkdev_issue_flush(struct block_device *bdev, gfp_t gfp_mask,
* copied from blk_rq_pos(rq).
*/
if (error_sector)
- *error_sector = bio->bi_sector;
+ *error_sector = bio->bi_iter.bi_sector;
bio_put(bio);
return ret;
diff --git a/block/blk-integrity.c b/block/blk-integrity.c
index 03cf7179e8e..7fbab84399e 100644
--- a/block/blk-integrity.c
+++ b/block/blk-integrity.c
@@ -43,30 +43,32 @@ static const char *bi_unsupported_name = "unsupported";
*/
int blk_rq_count_integrity_sg(struct request_queue *q, struct bio *bio)
{
- struct bio_vec *iv, *ivprv = NULL;
+ struct bio_vec iv, ivprv = { NULL };
unsigned int segments = 0;
unsigned int seg_size = 0;
- unsigned int i = 0;
+ struct bvec_iter iter;
+ int prev = 0;
- bio_for_each_integrity_vec(iv, bio, i) {
+ bio_for_each_integrity_vec(iv, bio, iter) {
- if (ivprv) {
- if (!BIOVEC_PHYS_MERGEABLE(ivprv, iv))
+ if (prev) {
+ if (!BIOVEC_PHYS_MERGEABLE(&ivprv, &iv))
goto new_segment;
- if (!BIOVEC_SEG_BOUNDARY(q, ivprv, iv))
+ if (!BIOVEC_SEG_BOUNDARY(q, &ivprv, &iv))
goto new_segment;
- if (seg_size + iv->bv_len > queue_max_segment_size(q))
+ if (seg_size + iv.bv_len > queue_max_segment_size(q))
goto new_segment;
- seg_size += iv->bv_len;
+ seg_size += iv.bv_len;
} else {
new_segment:
segments++;
- seg_size = iv->bv_len;
+ seg_size = iv.bv_len;
}
+ prev = 1;
ivprv = iv;
}
@@ -87,24 +89,25 @@ EXPORT_SYMBOL(blk_rq_count_integrity_sg);
int blk_rq_map_integrity_sg(struct request_queue *q, struct bio *bio,
struct scatterlist *sglist)
{
- struct bio_vec *iv, *ivprv = NULL;
+ struct bio_vec iv, ivprv = { NULL };
struct scatterlist *sg = NULL;
unsigned int segments = 0;
- unsigned int i = 0;
+ struct bvec_iter iter;
+ int prev = 0;
- bio_for_each_integrity_vec(iv, bio, i) {
+ bio_for_each_integrity_vec(iv, bio, iter) {
- if (ivprv) {
- if (!BIOVEC_PHYS_MERGEABLE(ivprv, iv))
+ if (prev) {
+ if (!BIOVEC_PHYS_MERGEABLE(&ivprv, &iv))
goto new_segment;
- if (!BIOVEC_SEG_BOUNDARY(q, ivprv, iv))
+ if (!BIOVEC_SEG_BOUNDARY(q, &ivprv, &iv))
goto new_segment;
- if (sg->length + iv->bv_len > queue_max_segment_size(q))
+ if (sg->length + iv.bv_len > queue_max_segment_size(q))
goto new_segment;
- sg->length += iv->bv_len;
+ sg->length += iv.bv_len;
} else {
new_segment:
if (!sg)
@@ -114,10 +117,11 @@ new_segment:
sg = sg_next(sg);
}
- sg_set_page(sg, iv->bv_page, iv->bv_len, iv->bv_offset);
+ sg_set_page(sg, iv.bv_page, iv.bv_len, iv.bv_offset);
segments++;
}
+ prev = 1;
ivprv = iv;
}
diff --git a/block/blk-lib.c b/block/blk-lib.c
index 9b5b561cb92..2da76c999ef 100644
--- a/block/blk-lib.c
+++ b/block/blk-lib.c
@@ -108,12 +108,12 @@ int blkdev_issue_discard(struct block_device *bdev, sector_t sector,
req_sects = end_sect - sector;
}
- bio->bi_sector = sector;
+ bio->bi_iter.bi_sector = sector;
bio->bi_end_io = bio_batch_end_io;
bio->bi_bdev = bdev;
bio->bi_private = &bb;
- bio->bi_size = req_sects << 9;
+ bio->bi_iter.bi_size = req_sects << 9;
nr_sects -= req_sects;
sector = end_sect;
@@ -174,7 +174,7 @@ int blkdev_issue_write_same(struct block_device *bdev, sector_t sector,
break;
}
- bio->bi_sector = sector;
+ bio->bi_iter.bi_sector = sector;
bio->bi_end_io = bio_batch_end_io;
bio->bi_bdev = bdev;
bio->bi_private = &bb;
@@ -184,11 +184,11 @@ int blkdev_issue_write_same(struct block_device *bdev, sector_t sector,
bio->bi_io_vec->bv_len = bdev_logical_block_size(bdev);
if (nr_sects > max_write_same_sectors) {
- bio->bi_size = max_write_same_sectors << 9;
+ bio->bi_iter.bi_size = max_write_same_sectors << 9;
nr_sects -= max_write_same_sectors;
sector += max_write_same_sectors;
} else {
- bio->bi_size = nr_sects << 9;
+ bio->bi_iter.bi_size = nr_sects << 9;
nr_sects = 0;
}
@@ -240,7 +240,7 @@ int __blkdev_issue_zeroout(struct block_device *bdev, sector_t sector,
break;
}
- bio->bi_sector = sector;
+ bio->bi_iter.bi_sector = sector;
bio->bi_bdev = bdev;
bio->bi_end_io = bio_batch_end_io;
bio->bi_private = &bb;
diff --git a/block/blk-map.c b/block/blk-map.c
index 623e1cd4cff..ae4ae1047fd 100644
--- a/block/blk-map.c
+++ b/block/blk-map.c
@@ -20,7 +20,7 @@ int blk_rq_append_bio(struct request_queue *q, struct request *rq,
rq->biotail->bi_next = bio;
rq->biotail = bio;
- rq->__data_len += bio->bi_size;
+ rq->__data_len += bio->bi_iter.bi_size;
}
return 0;
}
@@ -76,7 +76,7 @@ static int __blk_rq_map_user(struct request_queue *q, struct request *rq,
ret = blk_rq_append_bio(q, rq, bio);
if (!ret)
- return bio->bi_size;
+ return bio->bi_iter.bi_size;
/* if it was boucned we must call the end io function */
bio_endio(bio, 0);
@@ -220,7 +220,7 @@ int blk_rq_map_user_iov(struct request_queue *q, struct request *rq,
if (IS_ERR(bio))
return PTR_ERR(bio);
- if (bio->bi_size != len) {
+ if (bio->bi_iter.bi_size != len) {
/*
* Grab an extra reference to this bio, as bio_unmap_user()
* expects to be able to drop it twice as it happens on the
diff --git a/block/blk-merge.c b/block/blk-merge.c
index 1ffc5897783..8f8adaa9546 100644
--- a/block/blk-merge.c
+++ b/block/blk-merge.c
@@ -12,10 +12,11 @@
static unsigned int __blk_recalc_rq_segments(struct request_queue *q,
struct bio *bio)
{
- struct bio_vec *bv, *bvprv = NULL;
- int cluster, i, high, highprv = 1;
+ struct bio_vec bv, bvprv = { NULL };
+ int cluster, high, highprv = 1;
unsigned int seg_size, nr_phys_segs;
struct bio *fbio, *bbio;
+ struct bvec_iter iter;
if (!bio)
return 0;
@@ -25,25 +26,23 @@ static unsigned int __blk_recalc_rq_segments(struct request_queue *q,
seg_size = 0;
nr_phys_segs = 0;
for_each_bio(bio) {
- bio_for_each_segment(bv, bio, i) {
+ bio_for_each_segment(bv, bio, iter) {
/*
* the trick here is making sure that a high page is
* never considered part of another segment, since that
* might change with the bounce page.
*/
- high = page_to_pfn(bv->bv_page) > queue_bounce_pfn(q);
- if (high || highprv)
- goto new_segment;
- if (cluster) {
- if (seg_size + bv->bv_len
+ high = page_to_pfn(bv.bv_page) > queue_bounce_pfn(q);
+ if (!high && !highprv && cluster) {
+ if (seg_size + bv.bv_len
> queue_max_segment_size(q))
goto new_segment;
- if (!BIOVEC_PHYS_MERGEABLE(bvprv, bv))
+ if (!BIOVEC_PHYS_MERGEABLE(&bvprv, &bv))
goto new_segment;
- if (!BIOVEC_SEG_BOUNDARY(q, bvprv, bv))
+ if (!BIOVEC_SEG_BOUNDARY(q, &bvprv, &bv))
goto new_segment;
- seg_size += bv->bv_len;
+ seg_size += bv.bv_len;
bvprv = bv;
continue;
}
@@ -54,7 +53,7 @@ new_segment:
nr_phys_segs++;
bvprv = bv;
- seg_size = bv->bv_len;
+ seg_size = bv.bv_len;
highprv = high;
}
bbio = bio;
@@ -87,6 +86,9 @@ EXPORT_SYMBOL(blk_recount_segments);
static int blk_phys_contig_segment(struct request_queue *q, struct bio *bio,
struct bio *nxt)
{
+ struct bio_vec end_bv = { NULL }, nxt_bv;
+ struct bvec_iter iter;
+
if (!blk_queue_cluster(q))
return 0;
@@ -97,34 +99,40 @@ static int blk_phys_contig_segment(struct request_queue *q, struct bio *bio,
if (!bio_has_data(bio))
return 1;
- if (!BIOVEC_PHYS_MERGEABLE(__BVEC_END(bio), __BVEC_START(nxt)))
+ bio_for_each_segment(end_bv, bio, iter)
+ if (end_bv.bv_len == iter.bi_size)
+ break;
+
+ nxt_bv = bio_iovec(nxt);
+
+ if (!BIOVEC_PHYS_MERGEABLE(&end_bv, &nxt_bv))
return 0;
/*
* bio and nxt are contiguous in memory; check if the queue allows
* these two to be merged into one
*/
- if (BIO_SEG_BOUNDARY(q, bio, nxt))
+ if (BIOVEC_SEG_BOUNDARY(q, &end_bv, &nxt_bv))
return 1;
return 0;
}
-static void
+static inline void
__blk_segment_map_sg(struct request_queue *q, struct bio_vec *bvec,
- struct scatterlist *sglist, struct bio_vec **bvprv,
+ struct scatterlist *sglist, struct bio_vec *bvprv,
struct scatterlist **sg, int *nsegs, int *cluster)
{
int nbytes = bvec->bv_len;
- if (*bvprv && *cluster) {
+ if (*sg && *cluster) {
if ((*sg)->length + nbytes > queue_max_segment_size(q))
goto new_segment;
- if (!BIOVEC_PHYS_MERGEABLE(*bvprv, bvec))
+ if (!BIOVEC_PHYS_MERGEABLE(bvprv, bvec))
goto new_segment;
- if (!BIOVEC_SEG_BOUNDARY(q, *bvprv, bvec))
+ if (!BIOVEC_SEG_BOUNDARY(q, bvprv, bvec))
goto new_segment;
(*sg)->length += nbytes;
@@ -150,7 +158,7 @@ new_segment:
sg_set_page(*sg, bvec->bv_page, nbytes, bvec->bv_offset);
(*nsegs)++;
}
- *bvprv = bvec;
+ *bvprv = *bvec;
}
/*
@@ -160,7 +168,7 @@ new_segment:
int blk_rq_map_sg(struct request_queue *q, struct request *rq,
struct scatterlist *sglist)
{
- struct bio_vec *bvec, *bvprv;
+ struct bio_vec bvec, bvprv = { NULL };
struct req_iterator iter;
struct scatterlist *sg;
int nsegs, cluster;
@@ -171,10 +179,9 @@ int blk_rq_map_sg(struct request_queue *q, struct request *rq,
/*
* for each bio in rq
*/
- bvprv = NULL;
sg = NULL;
rq_for_each_segment(bvec, rq, iter) {
- __blk_segment_map_sg(q, bvec, sglist, &bvprv, &sg,
+ __blk_segment_map_sg(q, &bvec, sglist, &bvprv, &sg,
&nsegs, &cluster);
} /* segments in rq */
@@ -223,18 +230,17 @@ EXPORT_SYMBOL(blk_rq_map_sg);
int blk_bio_map_sg(struct request_queue *q, struct bio *bio,
struct scatterlist *sglist)
{
- struct bio_vec *bvec, *bvprv;
+ struct bio_vec bvec, bvprv = { NULL };
struct scatterlist *sg;
int nsegs, cluster;
- unsigned long i;
+ struct bvec_iter iter;
nsegs = 0;
cluster = blk_queue_cluster(q);
- bvprv = NULL;
sg = NULL;
- bio_for_each_segment(bvec, bio, i) {
- __blk_segment_map_sg(q, bvec, sglist, &bvprv, &sg,
+ bio_for_each_segment(bvec, bio, iter) {
+ __blk_segment_map_sg(q, &bvec, sglist, &bvprv, &sg,
&nsegs, &cluster);
} /* segments in bio */
@@ -543,9 +549,9 @@ bool blk_rq_merge_ok(struct request *rq, struct bio *bio)
int blk_try_merge(struct request *rq, struct bio *bio)
{
- if (blk_rq_pos(rq) + blk_rq_sectors(rq) == bio->bi_sector)
+ if (blk_rq_pos(rq) + blk_rq_sectors(rq) == bio->bi_iter.bi_sector)
return ELEVATOR_BACK_MERGE;
- else if (blk_rq_pos(rq) - bio_sectors(bio) == bio->bi_sector)
+ else if (blk_rq_pos(rq) - bio_sectors(bio) == bio->bi_iter.bi_sector)
return ELEVATOR_FRONT_MERGE;
return ELEVATOR_NO_MERGE;
}
diff --git a/block/blk-mq-cpu.c b/block/blk-mq-cpu.c
index 0045ace9bdf..3146befb56a 100644
--- a/block/blk-mq-cpu.c
+++ b/block/blk-mq-cpu.c
@@ -28,36 +28,6 @@ static int blk_mq_main_cpu_notify(struct notifier_block *self,
return NOTIFY_OK;
}
-static void blk_mq_cpu_notify(void *data, unsigned long action,
- unsigned int cpu)
-{
- if (action == CPU_DEAD || action == CPU_DEAD_FROZEN) {
- /*
- * If the CPU goes away, ensure that we run any pending
- * completions.
- */
- struct llist_node *node;
- struct request *rq;
-
- local_irq_disable();
-
- node = llist_del_all(&per_cpu(ipi_lists, cpu));
- while (node) {
- struct llist_node *next = node->next;
-
- rq = llist_entry(node, struct request, ll_list);
- __blk_mq_end_io(rq, rq->errors);
- node = next;
- }
-
- local_irq_enable();
- }
-}
-
-static struct notifier_block __cpuinitdata blk_mq_main_cpu_notifier = {
- .notifier_call = blk_mq_main_cpu_notify,
-};
-
void blk_mq_register_cpu_notifier(struct blk_mq_cpu_notifier *notifier)
{
BUG_ON(!notifier->notify);
@@ -82,12 +52,7 @@ void blk_mq_init_cpu_notifier(struct blk_mq_cpu_notifier *notifier,
notifier->data = data;
}
-static struct blk_mq_cpu_notifier __cpuinitdata cpu_notifier = {
- .notify = blk_mq_cpu_notify,
-};
-
void __init blk_mq_cpu_init(void)
{
- register_hotcpu_notifier(&blk_mq_main_cpu_notifier);
- blk_mq_register_cpu_notifier(&cpu_notifier);
+ hotcpu_notifier(blk_mq_main_cpu_notify, 0);
}
diff --git a/block/blk-mq.c b/block/blk-mq.c
index c79126e1103..57039fcd9c9 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -27,8 +27,6 @@ static LIST_HEAD(all_q_list);
static void __blk_mq_run_hw_queue(struct blk_mq_hw_ctx *hctx);
-DEFINE_PER_CPU(struct llist_head, ipi_lists);
-
static struct blk_mq_ctx *__blk_mq_get_ctx(struct request_queue *q,
unsigned int cpu)
{
@@ -106,10 +104,13 @@ static int blk_mq_queue_enter(struct request_queue *q)
spin_lock_irq(q->queue_lock);
ret = wait_event_interruptible_lock_irq(q->mq_freeze_wq,
- !blk_queue_bypass(q), *q->queue_lock);
+ !blk_queue_bypass(q) || blk_queue_dying(q),
+ *q->queue_lock);
/* inc usage with lock hold to avoid freeze_queue runs here */
- if (!ret)
+ if (!ret && !blk_queue_dying(q))
__percpu_counter_add(&q->mq_usage_counter, 1, 1000000);
+ else if (blk_queue_dying(q))
+ ret = -ENODEV;
spin_unlock_irq(q->queue_lock);
return ret;
@@ -120,6 +121,22 @@ static void blk_mq_queue_exit(struct request_queue *q)
__percpu_counter_add(&q->mq_usage_counter, -1, 1000000);
}
+static void __blk_mq_drain_queue(struct request_queue *q)
+{
+ while (true) {
+ s64 count;
+
+ spin_lock_irq(q->queue_lock);
+ count = percpu_counter_sum(&q->mq_usage_counter);
+ spin_unlock_irq(q->queue_lock);
+
+ if (count == 0)
+ break;
+ blk_mq_run_queues(q, false);
+ msleep(10);
+ }
+}
+
/*
* Guarantee no request is in use, so we can change any data structure of
* the queue afterward.
@@ -133,21 +150,13 @@ static void blk_mq_freeze_queue(struct request_queue *q)
queue_flag_set(QUEUE_FLAG_BYPASS, q);
spin_unlock_irq(q->queue_lock);
- if (!drain)
- return;
-
- while (true) {
- s64 count;
-
- spin_lock_irq(q->queue_lock);
- count = percpu_counter_sum(&q->mq_usage_counter);
- spin_unlock_irq(q->queue_lock);
+ if (drain)
+ __blk_mq_drain_queue(q);
+}
- if (count == 0)
- break;
- blk_mq_run_queues(q, false);
- msleep(10);
- }
+void blk_mq_drain_queue(struct request_queue *q)
+{
+ __blk_mq_drain_queue(q);
}
static void blk_mq_unfreeze_queue(struct request_queue *q)
@@ -179,6 +188,8 @@ static void blk_mq_rq_ctx_init(struct request_queue *q, struct blk_mq_ctx *ctx,
rq->mq_ctx = ctx;
rq->cmd_flags = rw_flags;
+ rq->start_time = jiffies;
+ set_start_time_ns(rq);
ctx->rq_dispatched[rw_is_sync(rw_flags)]++;
}
@@ -305,7 +316,7 @@ void blk_mq_complete_request(struct request *rq, int error)
struct bio *next = bio->bi_next;
bio->bi_next = NULL;
- bytes += bio->bi_size;
+ bytes += bio->bi_iter.bi_size;
blk_mq_bio_endio(rq, bio, error);
bio = next;
}
@@ -326,55 +337,12 @@ void __blk_mq_end_io(struct request *rq, int error)
blk_mq_complete_request(rq, error);
}
-#if defined(CONFIG_SMP)
-
-/*
- * Called with interrupts disabled.
- */
-static void ipi_end_io(void *data)
-{
- struct llist_head *list = &per_cpu(ipi_lists, smp_processor_id());
- struct llist_node *entry, *next;
- struct request *rq;
-
- entry = llist_del_all(list);
-
- while (entry) {
- next = entry->next;
- rq = llist_entry(entry, struct request, ll_list);
- __blk_mq_end_io(rq, rq->errors);
- entry = next;
- }
-}
-
-static int ipi_remote_cpu(struct blk_mq_ctx *ctx, const int cpu,
- struct request *rq, const int error)
+static void blk_mq_end_io_remote(void *data)
{
- struct call_single_data *data = &rq->csd;
-
- rq->errors = error;
- rq->ll_list.next = NULL;
+ struct request *rq = data;
- /*
- * If the list is non-empty, an existing IPI must already
- * be "in flight". If that is the case, we need not schedule
- * a new one.
- */
- if (llist_add(&rq->ll_list, &per_cpu(ipi_lists, ctx->cpu))) {
- data->func = ipi_end_io;
- data->flags = 0;
- __smp_call_function_single(ctx->cpu, data, 0);
- }
-
- return true;
-}
-#else /* CONFIG_SMP */
-static int ipi_remote_cpu(struct blk_mq_ctx *ctx, const int cpu,
- struct request *rq, const int error)
-{
- return false;
+ __blk_mq_end_io(rq, rq->errors);
}
-#endif
/*
* End IO on this request on a multiqueue enabled driver. We'll either do
@@ -390,11 +358,15 @@ void blk_mq_end_io(struct request *rq, int error)
return __blk_mq_end_io(rq, error);
cpu = get_cpu();
-
- if (cpu == ctx->cpu || !cpu_online(ctx->cpu) ||
- !ipi_remote_cpu(ctx, cpu, rq, error))
+ if (cpu != ctx->cpu && cpu_online(ctx->cpu)) {
+ rq->errors = error;
+ rq->csd.func = blk_mq_end_io_remote;
+ rq->csd.info = rq;
+ rq->csd.flags = 0;
+ __smp_call_function_single(ctx->cpu, &rq->csd, 0);
+ } else {
__blk_mq_end_io(rq, error);
-
+ }
put_cpu();
}
EXPORT_SYMBOL(blk_mq_end_io);
@@ -1091,8 +1063,8 @@ static void blk_mq_free_rq_map(struct blk_mq_hw_ctx *hctx)
struct page *page;
while (!list_empty(&hctx->page_list)) {
- page = list_first_entry(&hctx->page_list, struct page, list);
- list_del_init(&page->list);
+ page = list_first_entry(&hctx->page_list, struct page, lru);
+ list_del_init(&page->lru);
__free_pages(page, page->private);
}
@@ -1156,7 +1128,7 @@ static int blk_mq_init_rq_map(struct blk_mq_hw_ctx *hctx,
break;
page->private = this_order;
- list_add_tail(&page->list, &hctx->page_list);
+ list_add_tail(&page->lru, &hctx->page_list);
p = page_address(page);
entries_per_page = order_to_size(this_order) / rq_size;
@@ -1429,7 +1401,6 @@ void blk_mq_free_queue(struct request_queue *q)
int i;
queue_for_each_hw_ctx(q, hctx, i) {
- cancel_delayed_work_sync(&hctx->delayed_work);
kfree(hctx->ctx_map);
kfree(hctx->ctxs);
blk_mq_free_rq_map(hctx);
@@ -1451,7 +1422,6 @@ void blk_mq_free_queue(struct request_queue *q)
list_del_init(&q->all_q_node);
mutex_unlock(&all_q_mutex);
}
-EXPORT_SYMBOL(blk_mq_free_queue);
/* Basically redo blk_mq_init_queue with queue frozen */
static void blk_mq_queue_reinit(struct request_queue *q)
@@ -1495,11 +1465,6 @@ static int blk_mq_queue_reinit_notify(struct notifier_block *nb,
static int __init blk_mq_init(void)
{
- unsigned int i;
-
- for_each_possible_cpu(i)
- init_llist_head(&per_cpu(ipi_lists, i));
-
blk_mq_cpu_init();
/* Must be called after percpu_counter_hotcpu_callback() */
diff --git a/block/blk-mq.h b/block/blk-mq.h
index 52bf1f96a2c..5c3917984b0 100644
--- a/block/blk-mq.h
+++ b/block/blk-mq.h
@@ -27,6 +27,8 @@ void blk_mq_complete_request(struct request *rq, int error);
void blk_mq_run_request(struct request *rq, bool run_queue, bool async);
void blk_mq_run_hw_queue(struct blk_mq_hw_ctx *hctx, bool async);
void blk_mq_init_flush(struct request_queue *q);
+void blk_mq_drain_queue(struct request_queue *q);
+void blk_mq_free_queue(struct request_queue *q);
/*
* CPU hotplug helpers
@@ -38,7 +40,6 @@ void blk_mq_init_cpu_notifier(struct blk_mq_cpu_notifier *notifier,
void blk_mq_register_cpu_notifier(struct blk_mq_cpu_notifier *notifier);
void blk_mq_unregister_cpu_notifier(struct blk_mq_cpu_notifier *notifier);
void blk_mq_cpu_init(void);
-DECLARE_PER_CPU(struct llist_head, ipi_lists);
/*
* CPU -> queue mappings
diff --git a/block/blk-sysfs.c b/block/blk-sysfs.c
index 97779522472..8095c4a21fc 100644
--- a/block/blk-sysfs.c
+++ b/block/blk-sysfs.c
@@ -11,6 +11,7 @@
#include "blk.h"
#include "blk-cgroup.h"
+#include "blk-mq.h"
struct queue_sysfs_entry {
struct attribute attr;
diff --git a/block/blk-throttle.c b/block/blk-throttle.c
index a760857e6b6..1474c3ab7e7 100644
--- a/block/blk-throttle.c
+++ b/block/blk-throttle.c
@@ -877,14 +877,14 @@ static bool tg_with_in_bps_limit(struct throtl_grp *tg, struct bio *bio,
do_div(tmp, HZ);
bytes_allowed = tmp;
- if (tg->bytes_disp[rw] + bio->bi_size <= bytes_allowed) {
+ if (tg->bytes_disp[rw] + bio->bi_iter.bi_size <= bytes_allowed) {
if (wait)
*wait = 0;
return 1;
}
/* Calc approx time to dispatch */
- extra_bytes = tg->bytes_disp[rw] + bio->bi_size - bytes_allowed;
+ extra_bytes = tg->bytes_disp[rw] + bio->bi_iter.bi_size - bytes_allowed;
jiffy_wait = div64_u64(extra_bytes * HZ, tg->bps[rw]);
if (!jiffy_wait)
@@ -987,7 +987,7 @@ static void throtl_charge_bio(struct throtl_grp *tg, struct bio *bio)
bool rw = bio_data_dir(bio);
/* Charge the bio to the group */
- tg->bytes_disp[rw] += bio->bi_size;
+ tg->bytes_disp[rw] += bio->bi_iter.bi_size;
tg->io_disp[rw]++;
/*
@@ -1003,8 +1003,8 @@ static void throtl_charge_bio(struct throtl_grp *tg, struct bio *bio)
*/
if (!(bio->bi_rw & REQ_THROTTLED)) {
bio->bi_rw |= REQ_THROTTLED;
- throtl_update_dispatch_stats(tg_to_blkg(tg), bio->bi_size,
- bio->bi_rw);
+ throtl_update_dispatch_stats(tg_to_blkg(tg),
+ bio->bi_iter.bi_size, bio->bi_rw);
}
}
@@ -1503,7 +1503,7 @@ bool blk_throtl_bio(struct request_queue *q, struct bio *bio)
if (tg) {
if (!tg->has_rules[rw]) {
throtl_update_dispatch_stats(tg_to_blkg(tg),
- bio->bi_size, bio->bi_rw);
+ bio->bi_iter.bi_size, bio->bi_rw);
goto out_unlock_rcu;
}
}
@@ -1559,7 +1559,7 @@ bool blk_throtl_bio(struct request_queue *q, struct bio *bio)
/* out-of-limit, queue to @tg */
throtl_log(sq, "[%c] bio. bdisp=%llu sz=%u bps=%llu iodisp=%u iops=%u queued=%d/%d",
rw == READ ? 'R' : 'W',
- tg->bytes_disp[rw], bio->bi_size, tg->bps[rw],
+ tg->bytes_disp[rw], bio->bi_iter.bi_size, tg->bps[rw],
tg->io_disp[rw], tg->iops[rw],
sq->nr_queued[READ], sq->nr_queued[WRITE]);
diff --git a/block/cmdline-parser.c b/block/cmdline-parser.c
index cc2637f8674..9dbc67e42a9 100644
--- a/block/cmdline-parser.c
+++ b/block/cmdline-parser.c
@@ -4,8 +4,7 @@
* Written by Cai Zhiyong <caizhiyong@huawei.com>
*
*/
-#include <linux/buffer_head.h>
-#include <linux/module.h>
+#include <linux/export.h>
#include <linux/cmdline-parser.h>
static int parse_subpart(struct cmdline_subpart **subpart, char *partdef)
@@ -159,6 +158,7 @@ void cmdline_parts_free(struct cmdline_parts **parts)
*parts = next_parts;
}
}
+EXPORT_SYMBOL(cmdline_parts_free);
int cmdline_parts_parse(struct cmdline_parts **parts, const char *cmdline)
{
@@ -206,6 +206,7 @@ fail:
cmdline_parts_free(parts);
goto done;
}
+EXPORT_SYMBOL(cmdline_parts_parse);
struct cmdline_parts *cmdline_parts_find(struct cmdline_parts *parts,
const char *bdev)
@@ -214,17 +215,17 @@ struct cmdline_parts *cmdline_parts_find(struct cmdline_parts *parts,
parts = parts->next_parts;
return parts;
}
+EXPORT_SYMBOL(cmdline_parts_find);
/*
* add_part()
* 0 success.
* 1 can not add so many partitions.
*/
-void cmdline_parts_set(struct cmdline_parts *parts, sector_t disk_size,
- int slot,
- int (*add_part)(int, struct cmdline_subpart *, void *),
- void *param)
-
+int cmdline_parts_set(struct cmdline_parts *parts, sector_t disk_size,
+ int slot,
+ int (*add_part)(int, struct cmdline_subpart *, void *),
+ void *param)
{
sector_t from = 0;
struct cmdline_subpart *subpart;
@@ -247,4 +248,7 @@ void cmdline_parts_set(struct cmdline_parts *parts, sector_t disk_size,
if (add_part(slot, subpart, param))
break;
}
+
+ return slot;
}
+EXPORT_SYMBOL(cmdline_parts_set);
diff --git a/block/elevator.c b/block/elevator.c
index b7ff2861b6b..42c45a7d671 100644
--- a/block/elevator.c
+++ b/block/elevator.c
@@ -440,7 +440,7 @@ int elv_merge(struct request_queue *q, struct request **req, struct bio *bio)
/*
* See if our hash lookup can find a potential backmerge.
*/
- __rq = elv_rqhash_find(q, bio->bi_sector);
+ __rq = elv_rqhash_find(q, bio->bi_iter.bi_sector);
if (__rq && elv_rq_merge_ok(__rq, bio)) {
*req = __rq;
return ELEVATOR_BACK_MERGE;
diff --git a/block/scsi_ioctl.c b/block/scsi_ioctl.c
index 625e3e471d6..26487972ac5 100644
--- a/block/scsi_ioctl.c
+++ b/block/scsi_ioctl.c
@@ -323,12 +323,14 @@ static int sg_io(struct request_queue *q, struct gendisk *bd_disk,
if (hdr->iovec_count) {
size_t iov_data_len;
- struct iovec *iov;
+ struct iovec *iov = NULL;
ret = rw_copy_check_uvector(-1, hdr->dxferp, hdr->iovec_count,
0, NULL, &iov);
- if (ret < 0)
+ if (ret < 0) {
+ kfree(iov);
goto out;
+ }
iov_data_len = ret;
ret = 0;