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-rw-r--r--block/blk-barrier.c35
-rw-r--r--block/blk-core.c117
-rw-r--r--block/blk-exec.c2
-rw-r--r--block/blk-lib.c56
-rw-r--r--block/blk-map.c2
-rw-r--r--block/blk-merge.c9
-rw-r--r--block/blk-settings.c17
-rw-r--r--block/blk-sysfs.c82
-rw-r--r--block/blk.h6
-rw-r--r--block/cfq-iosched.c21
-rw-r--r--block/compat_ioctl.c56
-rw-r--r--block/elevator.c19
-rw-r--r--block/ioctl.c21
13 files changed, 214 insertions, 229 deletions
diff --git a/block/blk-barrier.c b/block/blk-barrier.c
index 0d710c9d403..f0faefca032 100644
--- a/block/blk-barrier.c
+++ b/block/blk-barrier.c
@@ -13,7 +13,6 @@
* blk_queue_ordered - does this queue support ordered writes
* @q: the request queue
* @ordered: one of QUEUE_ORDERED_*
- * @prepare_flush_fn: rq setup helper for cache flush ordered writes
*
* Description:
* For journalled file systems, doing ordered writes on a commit
@@ -22,15 +21,8 @@
* feature should call this function and indicate so.
*
**/
-int blk_queue_ordered(struct request_queue *q, unsigned ordered,
- prepare_flush_fn *prepare_flush_fn)
+int blk_queue_ordered(struct request_queue *q, unsigned ordered)
{
- if (!prepare_flush_fn && (ordered & (QUEUE_ORDERED_DO_PREFLUSH |
- QUEUE_ORDERED_DO_POSTFLUSH))) {
- printk(KERN_ERR "%s: prepare_flush_fn required\n", __func__);
- return -EINVAL;
- }
-
if (ordered != QUEUE_ORDERED_NONE &&
ordered != QUEUE_ORDERED_DRAIN &&
ordered != QUEUE_ORDERED_DRAIN_FLUSH &&
@@ -44,7 +36,6 @@ int blk_queue_ordered(struct request_queue *q, unsigned ordered,
q->ordered = ordered;
q->next_ordered = ordered;
- q->prepare_flush_fn = prepare_flush_fn;
return 0;
}
@@ -79,7 +70,7 @@ unsigned blk_ordered_req_seq(struct request *rq)
*
* http://thread.gmane.org/gmane.linux.kernel/537473
*/
- if (!blk_fs_request(rq))
+ if (rq->cmd_type != REQ_TYPE_FS)
return QUEUE_ORDSEQ_DRAIN;
if ((rq->cmd_flags & REQ_ORDERED_COLOR) ==
@@ -143,10 +134,10 @@ static void queue_flush(struct request_queue *q, unsigned which)
}
blk_rq_init(q, rq);
- rq->cmd_flags = REQ_HARDBARRIER;
- rq->rq_disk = q->bar_rq.rq_disk;
+ rq->cmd_type = REQ_TYPE_FS;
+ rq->cmd_flags = REQ_HARDBARRIER | REQ_FLUSH;
+ rq->rq_disk = q->orig_bar_rq->rq_disk;
rq->end_io = end_io;
- q->prepare_flush_fn(q, rq);
elv_insert(q, rq, ELEVATOR_INSERT_FRONT);
}
@@ -203,7 +194,7 @@ static inline bool start_ordered(struct request_queue *q, struct request **rqp)
/* initialize proxy request and queue it */
blk_rq_init(q, rq);
if (bio_data_dir(q->orig_bar_rq->bio) == WRITE)
- rq->cmd_flags |= REQ_RW;
+ rq->cmd_flags |= REQ_WRITE;
if (q->ordered & QUEUE_ORDERED_DO_FUA)
rq->cmd_flags |= REQ_FUA;
init_request_from_bio(rq, q->orig_bar_rq->bio);
@@ -236,7 +227,8 @@ static inline bool start_ordered(struct request_queue *q, struct request **rqp)
bool blk_do_ordered(struct request_queue *q, struct request **rqp)
{
struct request *rq = *rqp;
- const int is_barrier = blk_fs_request(rq) && blk_barrier_rq(rq);
+ const int is_barrier = rq->cmd_type == REQ_TYPE_FS &&
+ (rq->cmd_flags & REQ_HARDBARRIER);
if (!q->ordseq) {
if (!is_barrier)
@@ -261,7 +253,7 @@ bool blk_do_ordered(struct request_queue *q, struct request **rqp)
*/
/* Special requests are not subject to ordering rules. */
- if (!blk_fs_request(rq) &&
+ if (rq->cmd_type != REQ_TYPE_FS &&
rq != &q->pre_flush_rq && rq != &q->post_flush_rq)
return true;
@@ -319,6 +311,15 @@ int blkdev_issue_flush(struct block_device *bdev, gfp_t gfp_mask,
if (!q)
return -ENXIO;
+ /*
+ * some block devices may not have their queue correctly set up here
+ * (e.g. loop device without a backing file) and so issuing a flush
+ * here will panic. Ensure there is a request function before issuing
+ * the barrier.
+ */
+ if (!q->make_request_fn)
+ return -ENXIO;
+
bio = bio_alloc(gfp_mask, 0);
bio->bi_end_io = bio_end_empty_barrier;
bio->bi_bdev = bdev;
diff --git a/block/blk-core.c b/block/blk-core.c
index 7ac24fa71f7..77411486b11 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -184,7 +184,7 @@ void blk_dump_rq_flags(struct request *rq, char *msg)
printk(KERN_INFO " bio %p, biotail %p, buffer %p, len %u\n",
rq->bio, rq->biotail, rq->buffer, blk_rq_bytes(rq));
- if (blk_pc_request(rq)) {
+ if (rq->cmd_type == REQ_TYPE_BLOCK_PC) {
printk(KERN_INFO " cdb: ");
for (bit = 0; bit < BLK_MAX_CDB; bit++)
printk("%02x ", rq->cmd[bit]);
@@ -608,6 +608,7 @@ blk_init_allocated_queue_node(struct request_queue *q, request_fn_proc *rfn,
q->request_fn = rfn;
q->prep_rq_fn = NULL;
+ q->unprep_rq_fn = NULL;
q->unplug_fn = generic_unplug_device;
q->queue_flags = QUEUE_FLAG_DEFAULT;
q->queue_lock = lock;
@@ -1135,30 +1136,46 @@ void blk_put_request(struct request *req)
}
EXPORT_SYMBOL(blk_put_request);
+/**
+ * blk_add_request_payload - add a payload to a request
+ * @rq: request to update
+ * @page: page backing the payload
+ * @len: length of the payload.
+ *
+ * This allows to later add a payload to an already submitted request by
+ * a block driver. The driver needs to take care of freeing the payload
+ * itself.
+ *
+ * Note that this is a quite horrible hack and nothing but handling of
+ * discard requests should ever use it.
+ */
+void blk_add_request_payload(struct request *rq, struct page *page,
+ unsigned int len)
+{
+ struct bio *bio = rq->bio;
+
+ bio->bi_io_vec->bv_page = page;
+ bio->bi_io_vec->bv_offset = 0;
+ bio->bi_io_vec->bv_len = len;
+
+ bio->bi_size = len;
+ bio->bi_vcnt = 1;
+ bio->bi_phys_segments = 1;
+
+ rq->__data_len = rq->resid_len = len;
+ rq->nr_phys_segments = 1;
+ rq->buffer = bio_data(bio);
+}
+EXPORT_SYMBOL_GPL(blk_add_request_payload);
+
void init_request_from_bio(struct request *req, struct bio *bio)
{
req->cpu = bio->bi_comp_cpu;
req->cmd_type = REQ_TYPE_FS;
- /*
- * Inherit FAILFAST from bio (for read-ahead, and explicit
- * FAILFAST). FAILFAST flags are identical for req and bio.
- */
- if (bio_rw_flagged(bio, BIO_RW_AHEAD))
+ req->cmd_flags |= bio->bi_rw & REQ_COMMON_MASK;
+ if (bio->bi_rw & REQ_RAHEAD)
req->cmd_flags |= REQ_FAILFAST_MASK;
- else
- req->cmd_flags |= bio->bi_rw & REQ_FAILFAST_MASK;
-
- if (bio_rw_flagged(bio, BIO_RW_DISCARD))
- req->cmd_flags |= REQ_DISCARD;
- if (bio_rw_flagged(bio, BIO_RW_BARRIER))
- req->cmd_flags |= REQ_HARDBARRIER;
- if (bio_rw_flagged(bio, BIO_RW_SYNCIO))
- req->cmd_flags |= REQ_RW_SYNC;
- if (bio_rw_flagged(bio, BIO_RW_META))
- req->cmd_flags |= REQ_RW_META;
- if (bio_rw_flagged(bio, BIO_RW_NOIDLE))
- req->cmd_flags |= REQ_NOIDLE;
req->errors = 0;
req->__sector = bio->bi_sector;
@@ -1181,12 +1198,12 @@ static int __make_request(struct request_queue *q, struct bio *bio)
int el_ret;
unsigned int bytes = bio->bi_size;
const unsigned short prio = bio_prio(bio);
- const bool sync = bio_rw_flagged(bio, BIO_RW_SYNCIO);
- const bool unplug = bio_rw_flagged(bio, BIO_RW_UNPLUG);
+ const bool sync = (bio->bi_rw & REQ_SYNC);
+ const bool unplug = (bio->bi_rw & REQ_UNPLUG);
const unsigned int ff = bio->bi_rw & REQ_FAILFAST_MASK;
int rw_flags;
- if (bio_rw_flagged(bio, BIO_RW_BARRIER) &&
+ if ((bio->bi_rw & REQ_HARDBARRIER) &&
(q->next_ordered == QUEUE_ORDERED_NONE)) {
bio_endio(bio, -EOPNOTSUPP);
return 0;
@@ -1200,7 +1217,7 @@ static int __make_request(struct request_queue *q, struct bio *bio)
spin_lock_irq(q->queue_lock);
- if (unlikely(bio_rw_flagged(bio, BIO_RW_BARRIER)) || elv_queue_empty(q))
+ if (unlikely((bio->bi_rw & REQ_HARDBARRIER)) || elv_queue_empty(q))
goto get_rq;
el_ret = elv_merge(q, &req, bio);
@@ -1275,7 +1292,7 @@ get_rq:
*/
rw_flags = bio_data_dir(bio);
if (sync)
- rw_flags |= REQ_RW_SYNC;
+ rw_flags |= REQ_SYNC;
/*
* Grab a free request. This is might sleep but can not fail.
@@ -1464,7 +1481,7 @@ static inline void __generic_make_request(struct bio *bio)
goto end_io;
}
- if (unlikely(!bio_rw_flagged(bio, BIO_RW_DISCARD) &&
+ if (unlikely(!(bio->bi_rw & REQ_DISCARD) &&
nr_sectors > queue_max_hw_sectors(q))) {
printk(KERN_ERR "bio too big device %s (%u > %u)\n",
bdevname(bio->bi_bdev, b),
@@ -1497,8 +1514,7 @@ static inline void __generic_make_request(struct bio *bio)
if (bio_check_eod(bio, nr_sectors))
goto end_io;
- if (bio_rw_flagged(bio, BIO_RW_DISCARD) &&
- !blk_queue_discard(q)) {
+ if ((bio->bi_rw & REQ_DISCARD) && !blk_queue_discard(q)) {
err = -EOPNOTSUPP;
goto end_io;
}
@@ -1583,7 +1599,7 @@ void submit_bio(int rw, struct bio *bio)
* If it's a regular read/write or a barrier with data attached,
* go through the normal accounting stuff before submission.
*/
- if (bio_has_data(bio) && !(rw & (1 << BIO_RW_DISCARD))) {
+ if (bio_has_data(bio) && !(rw & REQ_DISCARD)) {
if (rw & WRITE) {
count_vm_events(PGPGOUT, count);
} else {
@@ -1628,6 +1644,9 @@ EXPORT_SYMBOL(submit_bio);
*/
int blk_rq_check_limits(struct request_queue *q, struct request *rq)
{
+ if (rq->cmd_flags & REQ_DISCARD)
+ return 0;
+
if (blk_rq_sectors(rq) > queue_max_sectors(q) ||
blk_rq_bytes(rq) > queue_max_hw_sectors(q) << 9) {
printk(KERN_ERR "%s: over max size limit.\n", __func__);
@@ -1796,7 +1815,7 @@ struct request *blk_peek_request(struct request_queue *q)
* sees this request (possibly after
* requeueing). Notify IO scheduler.
*/
- if (blk_sorted_rq(rq))
+ if (rq->cmd_flags & REQ_SORTED)
elv_activate_rq(q, rq);
/*
@@ -1984,10 +2003,11 @@ bool blk_update_request(struct request *req, int error, unsigned int nr_bytes)
* TODO: tj: This is too subtle. It would be better to let
* low level drivers do what they see fit.
*/
- if (blk_fs_request(req))
+ if (req->cmd_type == REQ_TYPE_FS)
req->errors = 0;
- if (error && (blk_fs_request(req) && !(req->cmd_flags & REQ_QUIET))) {
+ if (error && req->cmd_type == REQ_TYPE_FS &&
+ !(req->cmd_flags & REQ_QUIET)) {
printk(KERN_ERR "end_request: I/O error, dev %s, sector %llu\n",
req->rq_disk ? req->rq_disk->disk_name : "?",
(unsigned long long)blk_rq_pos(req));
@@ -2074,7 +2094,7 @@ bool blk_update_request(struct request *req, int error, unsigned int nr_bytes)
req->buffer = bio_data(req->bio);
/* update sector only for requests with clear definition of sector */
- if (blk_fs_request(req) || blk_discard_rq(req))
+ if (req->cmd_type == REQ_TYPE_FS || (req->cmd_flags & REQ_DISCARD))
req->__sector += total_bytes >> 9;
/* mixed attributes always follow the first bio */
@@ -2111,11 +2131,32 @@ static bool blk_update_bidi_request(struct request *rq, int error,
blk_update_request(rq->next_rq, error, bidi_bytes))
return true;
- add_disk_randomness(rq->rq_disk);
+ if (blk_queue_add_random(rq->q))
+ add_disk_randomness(rq->rq_disk);
return false;
}
+/**
+ * blk_unprep_request - unprepare a request
+ * @req: the request
+ *
+ * This function makes a request ready for complete resubmission (or
+ * completion). It happens only after all error handling is complete,
+ * so represents the appropriate moment to deallocate any resources
+ * that were allocated to the request in the prep_rq_fn. The queue
+ * lock is held when calling this.
+ */
+void blk_unprep_request(struct request *req)
+{
+ struct request_queue *q = req->q;
+
+ req->cmd_flags &= ~REQ_DONTPREP;
+ if (q->unprep_rq_fn)
+ q->unprep_rq_fn(q, req);
+}
+EXPORT_SYMBOL_GPL(blk_unprep_request);
+
/*
* queue lock must be held
*/
@@ -2126,11 +2167,15 @@ static void blk_finish_request(struct request *req, int error)
BUG_ON(blk_queued_rq(req));
- if (unlikely(laptop_mode) && blk_fs_request(req))
+ if (unlikely(laptop_mode) && req->cmd_type == REQ_TYPE_FS)
laptop_io_completion(&req->q->backing_dev_info);
blk_delete_timer(req);
+ if (req->cmd_flags & REQ_DONTPREP)
+ blk_unprep_request(req);
+
+
blk_account_io_done(req);
if (req->end_io)
@@ -2363,7 +2408,7 @@ void blk_rq_bio_prep(struct request_queue *q, struct request *rq,
struct bio *bio)
{
/* Bit 0 (R/W) is identical in rq->cmd_flags and bio->bi_rw */
- rq->cmd_flags |= bio->bi_rw & REQ_RW;
+ rq->cmd_flags |= bio->bi_rw & REQ_WRITE;
if (bio_has_data(bio)) {
rq->nr_phys_segments = bio_phys_segments(q, bio);
@@ -2450,6 +2495,8 @@ static void __blk_rq_prep_clone(struct request *dst, struct request *src)
{
dst->cpu = src->cpu;
dst->cmd_flags = (rq_data_dir(src) | REQ_NOMERGE);
+ if (src->cmd_flags & REQ_DISCARD)
+ dst->cmd_flags |= REQ_DISCARD;
dst->cmd_type = src->cmd_type;
dst->__sector = blk_rq_pos(src);
dst->__data_len = blk_rq_bytes(src);
diff --git a/block/blk-exec.c b/block/blk-exec.c
index 49557e91f0d..e1672f14840 100644
--- a/block/blk-exec.c
+++ b/block/blk-exec.c
@@ -57,7 +57,7 @@ void blk_execute_rq_nowait(struct request_queue *q, struct gendisk *bd_disk,
__elv_add_request(q, rq, where, 1);
__generic_unplug_device(q);
/* the queue is stopped so it won't be plugged+unplugged */
- if (blk_pm_resume_request(rq))
+ if (rq->cmd_type == REQ_TYPE_PM_RESUME)
q->request_fn(q);
spin_unlock_irq(q->queue_lock);
}
diff --git a/block/blk-lib.c b/block/blk-lib.c
index d0216b9f22d..c1fc55a83ba 100644
--- a/block/blk-lib.c
+++ b/block/blk-lib.c
@@ -19,7 +19,6 @@ static void blkdev_discard_end_io(struct bio *bio, int err)
if (bio->bi_private)
complete(bio->bi_private);
- __free_page(bio_page(bio));
bio_put(bio);
}
@@ -42,8 +41,8 @@ int blkdev_issue_discard(struct block_device *bdev, sector_t sector,
struct request_queue *q = bdev_get_queue(bdev);
int type = flags & BLKDEV_IFL_BARRIER ?
DISCARD_BARRIER : DISCARD_NOBARRIER;
+ unsigned int max_discard_sectors;
struct bio *bio;
- struct page *page;
int ret = 0;
if (!q)
@@ -52,36 +51,30 @@ int blkdev_issue_discard(struct block_device *bdev, sector_t sector,
if (!blk_queue_discard(q))
return -EOPNOTSUPP;
- while (nr_sects && !ret) {
- unsigned int sector_size = q->limits.logical_block_size;
- unsigned int max_discard_sectors =
- min(q->limits.max_discard_sectors, UINT_MAX >> 9);
+ /*
+ * Ensure that max_discard_sectors is of the proper
+ * granularity
+ */
+ max_discard_sectors = min(q->limits.max_discard_sectors, UINT_MAX >> 9);
+ if (q->limits.discard_granularity) {
+ unsigned int disc_sects = q->limits.discard_granularity >> 9;
+ max_discard_sectors &= ~(disc_sects - 1);
+ }
+
+ while (nr_sects && !ret) {
bio = bio_alloc(gfp_mask, 1);
- if (!bio)
- goto out;
+ if (!bio) {
+ ret = -ENOMEM;
+ break;
+ }
+
bio->bi_sector = sector;
bio->bi_end_io = blkdev_discard_end_io;
bio->bi_bdev = bdev;
if (flags & BLKDEV_IFL_WAIT)
bio->bi_private = &wait;
- /*
- * Add a zeroed one-sector payload as that's what
- * our current implementations need. If we'll ever need
- * more the interface will need revisiting.
- */
- page = alloc_page(gfp_mask | __GFP_ZERO);
- if (!page)
- goto out_free_bio;
- if (bio_add_pc_page(q, bio, page, sector_size, 0) < sector_size)
- goto out_free_page;
-
- /*
- * And override the bio size - the way discard works we
- * touch many more blocks on disk than the actual payload
- * length.
- */
if (nr_sects > max_discard_sectors) {
bio->bi_size = max_discard_sectors << 9;
nr_sects -= max_discard_sectors;
@@ -103,13 +96,8 @@ int blkdev_issue_discard(struct block_device *bdev, sector_t sector,
ret = -EIO;
bio_put(bio);
}
+
return ret;
-out_free_page:
- __free_page(page);
-out_free_bio:
- bio_put(bio);
-out:
- return -ENOMEM;
}
EXPORT_SYMBOL(blkdev_issue_discard);
@@ -157,7 +145,7 @@ static void bio_batch_end_io(struct bio *bio, int err)
int blkdev_issue_zeroout(struct block_device *bdev, sector_t sector,
sector_t nr_sects, gfp_t gfp_mask, unsigned long flags)
{
- int ret = 0;
+ int ret;
struct bio *bio;
struct bio_batch bb;
unsigned int sz, issued = 0;
@@ -175,11 +163,14 @@ int blkdev_issue_zeroout(struct block_device *bdev, sector_t sector,
return ret;
}
submit:
+ ret = 0;
while (nr_sects != 0) {
bio = bio_alloc(gfp_mask,
min(nr_sects, (sector_t)BIO_MAX_PAGES));
- if (!bio)
+ if (!bio) {
+ ret = -ENOMEM;
break;
+ }
bio->bi_sector = sector;
bio->bi_bdev = bdev;
@@ -198,6 +189,7 @@ submit:
if (ret < (sz << 9))
break;
}
+ ret = 0;
issued++;
submit_bio(WRITE, bio);
}
diff --git a/block/blk-map.c b/block/blk-map.c
index 9083cf0180c..c65d7593f7f 100644
--- a/block/blk-map.c
+++ b/block/blk-map.c
@@ -307,7 +307,7 @@ int blk_rq_map_kern(struct request_queue *q, struct request *rq, void *kbuf,
return PTR_ERR(bio);
if (rq_data_dir(rq) == WRITE)
- bio->bi_rw |= (1 << BIO_RW);
+ bio->bi_rw |= (1 << REQ_WRITE);
if (do_copy)
rq->cmd_flags |= REQ_COPY_USER;
diff --git a/block/blk-merge.c b/block/blk-merge.c
index 5e7dc997345..3b0cd424967 100644
--- a/block/blk-merge.c
+++ b/block/blk-merge.c
@@ -12,7 +12,6 @@
static unsigned int __blk_recalc_rq_segments(struct request_queue *q,
struct bio *bio)
{
- unsigned int phys_size;
struct bio_vec *bv, *bvprv = NULL;
int cluster, i, high, highprv = 1;
unsigned int seg_size, nr_phys_segs;
@@ -24,7 +23,7 @@ static unsigned int __blk_recalc_rq_segments(struct request_queue *q,
fbio = bio;
cluster = test_bit(QUEUE_FLAG_CLUSTER, &q->queue_flags);
seg_size = 0;
- phys_size = nr_phys_segs = 0;
+ nr_phys_segs = 0;
for_each_bio(bio) {
bio_for_each_segment(bv, bio, i) {
/*
@@ -180,7 +179,7 @@ new_segment:
}
if (q->dma_drain_size && q->dma_drain_needed(rq)) {
- if (rq->cmd_flags & REQ_RW)
+ if (rq->cmd_flags & REQ_WRITE)
memset(q->dma_drain_buffer, 0, q->dma_drain_size);
sg->page_link &= ~0x02;
@@ -226,7 +225,7 @@ int ll_back_merge_fn(struct request_queue *q, struct request *req,
{
unsigned short max_sectors;
- if (unlikely(blk_pc_request(req)))
+ if (unlikely(req->cmd_type == REQ_TYPE_BLOCK_PC))
max_sectors = queue_max_hw_sectors(q);
else
max_sectors = queue_max_sectors(q);
@@ -250,7 +249,7 @@ int ll_front_merge_fn(struct request_queue *q, struct request *req,
{
unsigned short max_sectors;
- if (unlikely(blk_pc_request(req)))
+ if (unlikely(req->cmd_type == REQ_TYPE_BLOCK_PC))
max_sectors = queue_max_hw_sectors(q);
else
max_sectors = queue_max_sectors(q);
diff --git a/block/blk-settings.c b/block/blk-settings.c
index f5ed5a1187b..a234f4bf1d6 100644
--- a/block/blk-settings.c
+++ b/block/blk-settings.c
@@ -37,6 +37,23 @@ void blk_queue_prep_rq(struct request_queue *q, prep_rq_fn *pfn)
EXPORT_SYMBOL(blk_queue_prep_rq);
/**
+ * blk_queue_unprep_rq - set an unprepare_request function for queue
+ * @q: queue
+ * @ufn: unprepare_request function
+ *
+ * It's possible for a queue to register an unprepare_request callback
+ * which is invoked before the request is finally completed. The goal
+ * of the function is to deallocate any data that was allocated in the
+ * prepare_request callback.
+ *
+ */
+void blk_queue_unprep_rq(struct request_queue *q, unprep_rq_fn *ufn)
+{
+ q->unprep_rq_fn = ufn;
+}
+EXPORT_SYMBOL(blk_queue_unprep_rq);
+
+/**
* blk_queue_merge_bvec - set a merge_bvec function for queue
* @q: queue
* @mbfn: merge_bvec_fn
diff --git a/block/blk-sysfs.c b/block/blk-sysfs.c
index 306759bbdf1..001ab18078f 100644
--- a/block/blk-sysfs.c
+++ b/block/blk-sysfs.c
@@ -180,26 +180,36 @@ static ssize_t queue_max_hw_sectors_show(struct request_queue *q, char *page)
return queue_var_show(max_hw_sectors_kb, (page));
}
-static ssize_t queue_nonrot_show(struct request_queue *q, char *page)
-{
- return queue_var_show(!blk_queue_nonrot(q), page);
+#define QUEUE_SYSFS_BIT_FNS(name, flag, neg) \
+static ssize_t \
+queue_show_##name(struct request_queue *q, char *page) \
+{ \
+ int bit; \
+ bit = test_bit(QUEUE_FLAG_##flag, &q->queue_flags); \
+ return queue_var_show(neg ? !bit : bit, page); \
+} \
+static ssize_t \
+queue_store_##name(struct request_queue *q, const char *page, size_t count) \
+{ \
+ unsigned long val; \
+ ssize_t ret; \
+ ret = queue_var_store(&val, page, count); \
+ if (neg) \
+ val = !val; \
+ \
+ spin_lock_irq(q->queue_lock); \
+ if (val) \
+ queue_flag_set(QUEUE_FLAG_##flag, q); \
+ else \
+ queue_flag_clear(QUEUE_FLAG_##flag, q); \
+ spin_unlock_irq(q->queue_lock); \
+ return ret; \
}
-static ssize_t queue_nonrot_store(struct request_queue *q, const char *page,
- size_t count)
-{
- unsigned long nm;
- ssize_t ret = queue_var_store(&nm, page, count);
-
- spin_lock_irq(q->queue_lock);
- if (nm)
- queue_flag_clear(QUEUE_FLAG_NONROT, q);
- else
- queue_flag_set(QUEUE_FLAG_NONROT, q);
- spin_unlock_irq(q->queue_lock);
-
- return ret;
-}
+QUEUE_SYSFS_BIT_FNS(nonrot, NONROT, 1);
+QUEUE_SYSFS_BIT_FNS(random, ADD_RANDOM, 0);
+QUEUE_SYSFS_BIT_FNS(iostats, IO_STAT, 0);
+#undef QUEUE_SYSFS_BIT_FNS
static ssize_t queue_nomerges_show(struct request_queue *q, char *page)
{
@@ -250,27 +260,6 @@ queue_rq_affinity_store(struct request_queue *q, const char *page, size_t count)
return ret;
}
-static ssize_t queue_iostats_show(struct request_queue *q, char *page)
-{
- return queue_var_show(blk_queue_io_stat(q), page);
-}
-
-static ssize_t queue_iostats_store(struct request_queue *q, const char *page,
- size_t count)
-{
- unsigned long stats;
- ssize_t ret = queue_var_store(&stats, page, count);
-
- spin_lock_irq(q->queue_lock);
- if (stats)
- queue_flag_set(QUEUE_FLAG_IO_STAT, q);
- else
- queue_flag_clear(QUEUE_FLAG_IO_STAT, q);
- spin_unlock_irq(q->queue_lock);
-
- return ret;
-}
-
static struct queue_sysfs_entry queue_requests_entry = {
.attr = {.name = "nr_requests", .mode = S_IRUGO | S_IWUSR },
.show = queue_requests_show,
@@ -352,8 +341,8 @@ static struct queue_sysfs_entry queue_discard_zeroes_data_entry = {
static struct queue_sysfs_entry queue_nonrot_entry = {
.attr = {.name = "rotational", .mode = S_IRUGO | S_IWUSR },
- .show = queue_nonrot_show,
- .store = queue_nonrot_store,
+ .show = queue_show_nonrot,
+ .store = queue_store_nonrot,
};
static struct queue_sysfs_entry queue_nomerges_entry = {
@@ -370,8 +359,14 @@ static struct queue_sysfs_entry queue_rq_affinity_entry = {
static struct queue_sysfs_entry queue_iostats_entry = {
.attr = {.name = "iostats", .mode = S_IRUGO | S_IWUSR },
- .show = queue_iostats_show,
- .store = queue_iostats_store,
+ .show = queue_show_iostats,
+ .store = queue_store_iostats,
+};
+
+static struct queue_sysfs_entry queue_random_entry = {
+ .attr = {.name = "add_random", .mode = S_IRUGO | S_IWUSR },
+ .show = queue_show_random,
+ .store = queue_store_random,
};
static struct attribute *default_attrs[] = {
@@ -394,6 +389,7 @@ static struct attribute *default_attrs[] = {
&queue_nomerges_entry.attr,
&queue_rq_affinity_entry.attr,
&queue_iostats_entry.attr,
+ &queue_random_entry.attr,
NULL,
};
diff --git a/block/blk.h b/block/blk.h
index 5ee3d7e72fe..6e7dc87141e 100644
--- a/block/blk.h
+++ b/block/blk.h
@@ -161,8 +161,10 @@ static inline int blk_cpu_to_group(int cpu)
*/
static inline int blk_do_io_stat(struct request *rq)
{
- return rq->rq_disk && blk_rq_io_stat(rq) &&
- (blk_fs_request(rq) || blk_discard_rq(rq));
+ return rq->rq_disk &&
+ (rq->cmd_flags & REQ_IO_STAT) &&
+ (rq->cmd_type == REQ_TYPE_FS ||
+ (rq->cmd_flags & REQ_DISCARD));
}
#endif
diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index 7982b830db5..eb4086f7dfe 100644
--- a/block/cfq-iosched.c
+++ b/block/cfq-iosched.c
@@ -458,7 +458,7 @@ static inline struct cfq_data *cic_to_cfqd(struct cfq_io_context *cic)
*/
static inline bool cfq_bio_sync(struct bio *bio)
{
- return bio_data_dir(bio) == READ || bio_rw_flagged(bio, BIO_RW_SYNCIO);
+ return bio_data_dir(bio) == READ || (bio->bi_rw & REQ_SYNC);
}
/*
@@ -646,9 +646,10 @@ cfq_choose_req(struct cfq_data *cfqd, struct request *rq1, struct request *rq2,
return rq1;
else if (rq_is_sync(rq2) && !rq_is_sync(rq1))
return rq2;
- if (rq_is_meta(rq1) && !rq_is_meta(rq2))
+ if ((rq1->cmd_flags & REQ_META) && !(rq2->cmd_flags & REQ_META))
return rq1;
- else if (rq_is_meta(rq2) && !rq_is_meta(rq1))
+ else if ((rq2->cmd_flags & REQ_META) &&
+ !(rq1->cmd_flags & REQ_META))
return rq2;
s1 = blk_rq_pos(rq1);
@@ -1484,7 +1485,7 @@ static void cfq_remove_request(struct request *rq)
cfqq->cfqd->rq_queued--;
cfq_blkiocg_update_io_remove_stats(&(RQ_CFQG(rq))->blkg,
rq_data_dir(rq), rq_is_sync(rq));
- if (rq_is_meta(rq)) {
+ if (rq->cmd_flags & REQ_META) {
WARN_ON(!cfqq->meta_pending);
cfqq->meta_pending--;
}
@@ -3176,7 +3177,7 @@ cfq_should_preempt(struct cfq_data *cfqd, struct cfq_queue *new_cfqq,
* So both queues are sync. Let the new request get disk time if
* it's a metadata request and the current queue is doing regular IO.
*/
- if (rq_is_meta(rq) && !cfqq->meta_pending)
+ if ((rq->cmd_flags & REQ_META) && !cfqq->meta_pending)
return true;
/*
@@ -3230,7 +3231,7 @@ cfq_rq_enqueued(struct cfq_data *cfqd, struct cfq_queue *cfqq,
struct cfq_io_context *cic = RQ_CIC(rq);
cfqd->rq_queued++;
- if (rq_is_meta(rq))
+ if (rq->cmd_flags & REQ_META)
cfqq->meta_pending++;
cfq_update_io_thinktime(cfqd, cic);
@@ -3365,7 +3366,8 @@ static void cfq_completed_request(struct request_queue *q, struct request *rq)
unsigned long now;
now = jiffies;
- cfq_log_cfqq(cfqd, cfqq, "complete rqnoidle %d", !!rq_noidle(rq));
+ cfq_log_cfqq(cfqd, cfqq, "complete rqnoidle %d",
+ !!(rq->cmd_flags & REQ_NOIDLE));
cfq_update_hw_tag(cfqd);
@@ -3419,11 +3421,12 @@ static void cfq_completed_request(struct request_queue *q, struct request *rq)
cfq_slice_expired(cfqd, 1);
else if (sync && cfqq_empty &&
!cfq_close_cooperator(cfqd, cfqq)) {
- cfqd->noidle_tree_requires_idle |= !rq_noidle(rq);
+ cfqd->noidle_tree_requires_idle |=
+ !(rq->cmd_flags & REQ_NOIDLE);
/*
* Idling is enabled for SYNC_WORKLOAD.
* SYNC_NOIDLE_WORKLOAD idles at the end of the tree
- * only if we processed at least one !rq_noidle request
+ * only if we processed at least one !REQ_NOIDLE request
*/
if (cfqd->serving_type == SYNC_WORKLOAD
|| cfqd->noidle_tree_requires_idle
diff --git a/block/compat_ioctl.c b/block/compat_ioctl.c
index f26051f4468..d5308563773 100644
--- a/block/compat_ioctl.c
+++ b/block/compat_ioctl.c
@@ -535,56 +535,6 @@ out:
return err;
}
-struct compat_blk_user_trace_setup {
- char name[32];
- u16 act_mask;
- u32 buf_size;
- u32 buf_nr;
- compat_u64 start_lba;
- compat_u64 end_lba;
- u32 pid;
-};
-#define BLKTRACESETUP32 _IOWR(0x12, 115, struct compat_blk_user_trace_setup)
-
-static int compat_blk_trace_setup(struct block_device *bdev, char __user *arg)
-{
- struct blk_user_trace_setup buts;
- struct compat_blk_user_trace_setup cbuts;
- struct request_queue *q;
- char b[BDEVNAME_SIZE];
- int ret;
-
- q = bdev_get_queue(bdev);
- if (!q)
- return -ENXIO;
-
- if (copy_from_user(&cbuts, arg, sizeof(cbuts)))
- return -EFAULT;
-
- bdevname(bdev, b);
-
- buts = (struct blk_user_trace_setup) {
- .act_mask = cbuts.act_mask,
- .buf_size = cbuts.buf_size,
- .buf_nr = cbuts.buf_nr,
- .start_lba = cbuts.start_lba,
- .end_lba = cbuts.end_lba,
- .pid = cbuts.pid,
- };
- memcpy(&buts.name, &cbuts.name, 32);
-
- mutex_lock(&bdev->bd_mutex);
- ret = do_blk_trace_setup(q, b, bdev->bd_dev, bdev, &buts);
- mutex_unlock(&bdev->bd_mutex);
- if (ret)
- return ret;
-
- if (copy_to_user(arg, &buts.name, 32))
- return -EFAULT;
-
- return 0;
-}
-
static int compat_blkdev_driver_ioctl(struct block_device *bdev, fmode_t mode,
unsigned cmd, unsigned long arg)
{
@@ -802,16 +752,10 @@ long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg)
return compat_put_u64(arg, bdev->bd_inode->i_size);
case BLKTRACESETUP32:
- lock_kernel();
- ret = compat_blk_trace_setup(bdev, compat_ptr(arg));
- unlock_kernel();
- return ret;
case BLKTRACESTART: /* compatible */
case BLKTRACESTOP: /* compatible */
case BLKTRACETEARDOWN: /* compatible */
- lock_kernel();
ret = blk_trace_ioctl(bdev, cmd, compat_ptr(arg));
- unlock_kernel();
return ret;
default:
if (disk->fops->compat_ioctl)
diff --git a/block/elevator.c b/block/elevator.c
index 923a9139106..816a7c8d639 100644
--- a/block/elevator.c
+++ b/block/elevator.c
@@ -79,8 +79,7 @@ int elv_rq_merge_ok(struct request *rq, struct bio *bio)
/*
* Don't merge file system requests and discard requests
*/
- if (bio_rw_flagged(bio, BIO_RW_DISCARD) !=
- bio_rw_flagged(rq->bio, BIO_RW_DISCARD))
+ if ((bio->bi_rw & REQ_DISCARD) != (rq->bio->bi_rw & REQ_DISCARD))
return 0;
/*
@@ -428,7 +427,8 @@ void elv_dispatch_sort(struct request_queue *q, struct request *rq)
list_for_each_prev(entry, &q->queue_head) {
struct request *pos = list_entry_rq(entry);
- if (blk_discard_rq(rq) != blk_discard_rq(pos))
+ if ((rq->cmd_flags & REQ_DISCARD) !=
+ (pos->cmd_flags & REQ_DISCARD))
break;
if (rq_data_dir(rq) != rq_data_dir(pos))
break;
@@ -558,7 +558,7 @@ void elv_requeue_request(struct request_queue *q, struct request *rq)
*/
if (blk_account_rq(rq)) {
q->in_flight[rq_is_sync(rq)]--;
- if (blk_sorted_rq(rq))
+ if (rq->cmd_flags & REQ_SORTED)
elv_deactivate_rq(q, rq);
}
@@ -644,7 +644,8 @@ void elv_insert(struct request_queue *q, struct request *rq, int where)
break;
case ELEVATOR_INSERT_SORT:
- BUG_ON(!blk_fs_request(rq) && !blk_discard_rq(rq));
+ BUG_ON(rq->cmd_type != REQ_TYPE_FS &&
+ !(rq->cmd_flags & REQ_DISCARD));
rq->cmd_flags |= REQ_SORTED;
q->nr_sorted++;
if (rq_mergeable(rq)) {
@@ -716,7 +717,7 @@ void __elv_add_request(struct request_queue *q, struct request *rq, int where,
/*
* toggle ordered color
*/
- if (blk_barrier_rq(rq))
+ if (rq->cmd_flags & REQ_HARDBARRIER)
q->ordcolor ^= 1;
/*
@@ -729,7 +730,8 @@ void __elv_add_request(struct request_queue *q, struct request *rq, int where,
* this request is scheduling boundary, update
* end_sector
*/
- if (blk_fs_request(rq) || blk_discard_rq(rq)) {
+ if (rq->cmd_type == REQ_TYPE_FS ||
+ (rq->cmd_flags & REQ_DISCARD)) {
q->end_sector = rq_end_sector(rq);
q->boundary_rq = rq;
}
@@ -843,7 +845,8 @@ void elv_completed_request(struct request_queue *q, struct request *rq)
*/
if (blk_account_rq(rq)) {
q->in_flight[rq_is_sync(rq)]--;
- if (blk_sorted_rq(rq) && e->ops->elevator_completed_req_fn)
+ if ((rq->cmd_flags & REQ_SORTED) &&
+ e->ops->elevator_completed_req_fn)
e->ops->elevator_completed_req_fn(q, rq);
}
diff --git a/block/ioctl.c b/block/ioctl.c
index e8eb679f2f9..09fd7f1ef23 100644
--- a/block/ioctl.c
+++ b/block/ioctl.c
@@ -163,18 +163,10 @@ int __blkdev_driver_ioctl(struct block_device *bdev, fmode_t mode,
unsigned cmd, unsigned long arg)
{
struct gendisk *disk = bdev->bd_disk;
- int ret;
if (disk->fops->ioctl)
return disk->fops->ioctl(bdev, mode, cmd, arg);
- if (disk->fops->locked_ioctl) {
- lock_kernel();
- ret = disk->fops->locked_ioctl(bdev, mode, cmd, arg);
- unlock_kernel();
- return ret;
- }
-
return -ENOTTY;
}
/*
@@ -185,8 +177,7 @@ int __blkdev_driver_ioctl(struct block_device *bdev, fmode_t mode,
EXPORT_SYMBOL_GPL(__blkdev_driver_ioctl);
/*
- * always keep this in sync with compat_blkdev_ioctl() and
- * compat_blkdev_locked_ioctl()
+ * always keep this in sync with compat_blkdev_ioctl()
*/
int blkdev_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd,
unsigned long arg)
@@ -206,10 +197,8 @@ int blkdev_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd,
if (ret != -EINVAL && ret != -ENOTTY)
return ret;
- lock_kernel();
fsync_bdev(bdev);
invalidate_bdev(bdev);
- unlock_kernel();
return 0;
case BLKROSET:
@@ -221,9 +210,7 @@ int blkdev_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd,
return -EACCES;
if (get_user(n, (int __user *)(arg)))
return -EFAULT;
- lock_kernel();
set_device_ro(bdev, n);
- unlock_kernel();
return 0;
case BLKDISCARD: {
@@ -309,14 +296,10 @@ int blkdev_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd,
bd_release(bdev);
return ret;
case BLKPG:
- lock_kernel();
ret = blkpg_ioctl(bdev, (struct blkpg_ioctl_arg __user *) arg);
- unlock_kernel();
break;
case BLKRRPART:
- lock_kernel();
ret = blkdev_reread_part(bdev);
- unlock_kernel();
break;
case BLKGETSIZE:
size = bdev->bd_inode->i_size;
@@ -329,9 +312,7 @@ int blkdev_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd,
case BLKTRACESTOP:
case BLKTRACESETUP:
case BLKTRACETEARDOWN:
- lock_kernel();
ret = blk_trace_ioctl(bdev, cmd, (char __user *) arg);
- unlock_kernel();
break;
default:
ret = __blkdev_driver_ioctl(bdev, mode, cmd, arg);