static void drive_stat_acct(struct request *rq, int new_io)
{
+ struct hd_struct *part;
int rw = rq_data_dir(rq);
if (!blk_fs_request(rq) || !rq->rq_disk)
return;
- if (!new_io) {
- __all_stat_inc(rq->rq_disk, merges[rw], rq->sector);
- } else {
- struct hd_struct *part = get_part(rq->rq_disk, rq->sector);
+ part = get_part(rq->rq_disk, rq->sector);
+ if (!new_io)
+ __all_stat_inc(rq->rq_disk, part, merges[rw], rq->sector);
+ else {
disk_round_stats(rq->rq_disk);
rq->rq_disk->in_flight++;
if (part) {
}
EXPORT_SYMBOL(blk_get_backing_dev_info);
-/*
- * We can't just memset() the structure, since the allocation path
- * already stored some information in the request.
- */
-void rq_init(struct request_queue *q, struct request *rq)
+void blk_rq_init(struct request_queue *q, struct request *rq)
{
+ memset(rq, 0, sizeof(*rq));
+
INIT_LIST_HEAD(&rq->queuelist);
INIT_LIST_HEAD(&rq->donelist);
rq->q = q;
rq->sector = rq->hard_sector = (sector_t) -1;
- rq->nr_sectors = rq->hard_nr_sectors = 0;
- rq->current_nr_sectors = rq->hard_cur_sectors = 0;
- rq->bio = rq->biotail = NULL;
INIT_HLIST_NODE(&rq->hash);
RB_CLEAR_NODE(&rq->rb_node);
- rq->rq_disk = NULL;
- rq->nr_phys_segments = 0;
- rq->nr_hw_segments = 0;
- rq->ioprio = 0;
- rq->special = NULL;
- rq->raw_data_len = 0;
- rq->buffer = NULL;
+ rq->cmd = rq->__cmd;
rq->tag = -1;
- rq->errors = 0;
rq->ref_count = 1;
- rq->cmd_len = 0;
- memset(rq->cmd, 0, sizeof(rq->cmd));
- rq->data_len = 0;
- rq->sense_len = 0;
- rq->data = NULL;
- rq->sense = NULL;
- rq->end_io = NULL;
- rq->end_io_data = NULL;
- rq->next_rq = NULL;
}
+EXPORT_SYMBOL(blk_rq_init);
static void req_bio_endio(struct request *rq, struct bio *bio,
unsigned int nbytes, int error)
if (unlikely(nbytes > bio->bi_size)) {
printk(KERN_ERR "%s: want %u bytes done, %u left\n",
- __FUNCTION__, nbytes, bio->bi_size);
+ __func__, nbytes, bio->bi_size);
nbytes = bio->bi_size;
}
bio->bi_size -= nbytes;
bio->bi_sector += (nbytes >> 9);
+
+ if (bio_integrity(bio))
+ bio_integrity_advance(bio, nbytes);
+
if (bio->bi_size == 0)
bio_endio(bio, error);
} else {
if (blk_pc_request(rq)) {
printk(KERN_INFO " cdb: ");
- for (bit = 0; bit < sizeof(rq->cmd); bit++)
+ for (bit = 0; bit < BLK_MAX_CDB; bit++)
printk("%02x ", rq->cmd[bit]);
printk("\n");
}
if (blk_queue_stopped(q))
return;
- if (!test_and_set_bit(QUEUE_FLAG_PLUGGED, &q->queue_flags)) {
+ if (!queue_flag_test_and_set(QUEUE_FLAG_PLUGGED, q)) {
mod_timer(&q->unplug_timer, jiffies + q->unplug_delay);
blk_add_trace_generic(q, NULL, 0, BLK_TA_PLUG);
}
{
WARN_ON(!irqs_disabled());
- if (!test_and_clear_bit(QUEUE_FLAG_PLUGGED, &q->queue_flags))
+ if (!queue_flag_test_and_clear(QUEUE_FLAG_PLUGGED, q))
return 0;
del_timer(&q->unplug_timer);
**/
void generic_unplug_device(struct request_queue *q)
{
- spin_lock_irq(q->queue_lock);
- __generic_unplug_device(q);
- spin_unlock_irq(q->queue_lock);
+ if (blk_queue_plugged(q)) {
+ spin_lock_irq(q->queue_lock);
+ __generic_unplug_device(q);
+ spin_unlock_irq(q->queue_lock);
+ }
}
EXPORT_SYMBOL(generic_unplug_device);
{
WARN_ON(!irqs_disabled());
- clear_bit(QUEUE_FLAG_STOPPED, &q->queue_flags);
+ queue_flag_clear(QUEUE_FLAG_STOPPED, q);
/*
* one level of recursion is ok and is much faster than kicking
* the unplug handling
*/
- if (!test_and_set_bit(QUEUE_FLAG_REENTER, &q->queue_flags)) {
+ if (!queue_flag_test_and_set(QUEUE_FLAG_REENTER, q)) {
q->request_fn(q);
- clear_bit(QUEUE_FLAG_REENTER, &q->queue_flags);
+ queue_flag_clear(QUEUE_FLAG_REENTER, q);
} else {
blk_plug_device(q);
kblockd_schedule_work(&q->unplug_work);
void blk_stop_queue(struct request_queue *q)
{
blk_remove_plug(q);
- set_bit(QUEUE_FLAG_STOPPED, &q->queue_flags);
+ queue_flag_set(QUEUE_FLAG_STOPPED, q);
}
EXPORT_SYMBOL(blk_stop_queue);
* blk_run_queue - run a single device queue
* @q: The queue to run
*/
-void blk_run_queue(struct request_queue *q)
+void __blk_run_queue(struct request_queue *q)
{
- unsigned long flags;
-
- spin_lock_irqsave(q->queue_lock, flags);
blk_remove_plug(q);
/*
* handling reinvoke the handler shortly if we already got there.
*/
if (!elv_queue_empty(q)) {
- if (!test_and_set_bit(QUEUE_FLAG_REENTER, &q->queue_flags)) {
+ if (!queue_flag_test_and_set(QUEUE_FLAG_REENTER, q)) {
q->request_fn(q);
- clear_bit(QUEUE_FLAG_REENTER, &q->queue_flags);
+ queue_flag_clear(QUEUE_FLAG_REENTER, q);
} else {
blk_plug_device(q);
kblockd_schedule_work(&q->unplug_work);
}
}
+}
+EXPORT_SYMBOL(__blk_run_queue);
+
+/**
+ * blk_run_queue - run a single device queue
+ * @q: The queue to run
+ */
+void blk_run_queue(struct request_queue *q)
+{
+ unsigned long flags;
+ spin_lock_irqsave(q->queue_lock, flags);
+ __blk_run_queue(q);
spin_unlock_irqrestore(q->queue_lock, flags);
}
EXPORT_SYMBOL(blk_run_queue);
{
kobject_put(&q->kobj);
}
-EXPORT_SYMBOL(blk_put_queue);
void blk_cleanup_queue(struct request_queue *q)
{
mutex_lock(&q->sysfs_lock);
- set_bit(QUEUE_FLAG_DEAD, &q->queue_flags);
+ queue_flag_set_unlocked(QUEUE_FLAG_DEAD, q);
mutex_unlock(&q->sysfs_lock);
if (q->elevator)
kobject_init(&q->kobj, &blk_queue_ktype);
mutex_init(&q->sysfs_lock);
+ spin_lock_init(&q->__queue_lock);
return q;
}
* if caller didn't supply a lock, they get per-queue locking with
* our embedded lock
*/
- if (!lock) {
- spin_lock_init(&q->__queue_lock);
+ if (!lock)
lock = &q->__queue_lock;
- }
q->request_fn = rfn;
q->prep_rq_fn = NULL;
return 1;
}
-EXPORT_SYMBOL(blk_get_queue);
static inline void blk_free_request(struct request_queue *q, struct request *rq)
{
if (!rq)
return NULL;
+ blk_rq_init(q, rq);
+
/*
* first three bits are identical in rq->cmd_flags and bio->bi_rw,
* see bio.h and blkdev.h
if (ioc_batching(q, ioc))
ioc->nr_batch_requests--;
- rq_init(q, rq);
-
blk_add_trace_generic(q, bio, rw, BLK_TA_GETRQ);
out:
return rq;
rq = get_request(q, rw_flags, bio, GFP_NOIO);
while (!rq) {
DEFINE_WAIT(wait);
+ struct io_context *ioc;
struct request_list *rl = &q->rq;
prepare_to_wait_exclusive(&rl->wait[rw], &wait,
TASK_UNINTERRUPTIBLE);
- rq = get_request(q, rw_flags, bio, GFP_NOIO);
-
- if (!rq) {
- struct io_context *ioc;
-
- blk_add_trace_generic(q, bio, rw, BLK_TA_SLEEPRQ);
+ blk_add_trace_generic(q, bio, rw, BLK_TA_SLEEPRQ);
- __generic_unplug_device(q);
- spin_unlock_irq(q->queue_lock);
- io_schedule();
+ __generic_unplug_device(q);
+ spin_unlock_irq(q->queue_lock);
+ io_schedule();
- /*
- * After sleeping, we become a "batching" process and
- * will be able to allocate at least one request, and
- * up to a big batch of them for a small period time.
- * See ioc_batching, ioc_set_batching
- */
- ioc = current_io_context(GFP_NOIO, q->node);
- ioc_set_batching(q, ioc);
+ /*
+ * After sleeping, we become a "batching" process and
+ * will be able to allocate at least one request, and
+ * up to a big batch of them for a small period time.
+ * See ioc_batching, ioc_set_batching
+ */
+ ioc = current_io_context(GFP_NOIO, q->node);
+ ioc_set_batching(q, ioc);
- spin_lock_irq(q->queue_lock);
- }
+ spin_lock_irq(q->queue_lock);
finish_wait(&rl->wait[rw], &wait);
- }
+
+ rq = get_request(q, rw_flags, bio, GFP_NOIO);
+ };
return rq;
}
unsigned long flags;
struct request_queue *q = req->q;
- /*
- * Gee, IDE calls in w/ NULL q. Fix IDE and remove the
- * following if (q) test.
- */
- if (q) {
- spin_lock_irqsave(q->queue_lock, flags);
- __blk_put_request(q, req);
- spin_unlock_irqrestore(q->queue_lock, flags);
- }
+ spin_lock_irqsave(q->queue_lock, flags);
+ __blk_put_request(q, req);
+ spin_unlock_irqrestore(q->queue_lock, flags);
}
EXPORT_SYMBOL(blk_put_request);
*/
blk_partition_remap(bio);
+ if (bio_integrity_enabled(bio) && bio_integrity_prep(bio))
+ goto end_io;
+
if (old_sector != -1)
blk_add_trace_remap(q, bio, old_dev, bio->bi_sector,
old_sector);
}
if (blk_fs_request(req) && req->rq_disk) {
+ struct hd_struct *part = get_part(req->rq_disk, req->sector);
const int rw = rq_data_dir(req);
- all_stat_add(req->rq_disk, sectors[rw],
- nr_bytes >> 9, req->sector);
+ all_stat_add(req->rq_disk, part, sectors[rw],
+ nr_bytes >> 9, req->sector);
}
total_bytes = bio_nbytes = 0;
if (unlikely(bio->bi_idx >= bio->bi_vcnt)) {
blk_dump_rq_flags(req, "__end_that");
printk(KERN_ERR "%s: bio idx %d >= vcnt %d\n",
- __FUNCTION__, bio->bi_idx,
- bio->bi_vcnt);
+ __func__, bio->bi_idx, bio->bi_vcnt);
break;
}
const int rw = rq_data_dir(req);
struct hd_struct *part = get_part(disk, req->sector);
- __all_stat_inc(disk, ios[rw], req->sector);
- __all_stat_add(disk, ticks[rw], duration, req->sector);
+ __all_stat_inc(disk, part, ios[rw], req->sector);
+ __all_stat_add(disk, part, ticks[rw], duration, req->sector);
disk_round_stats(disk);
disk->in_flight--;
if (part) {
rq->hard_cur_sectors = rq->current_nr_sectors;
rq->hard_nr_sectors = rq->nr_sectors = bio_sectors(bio);
rq->buffer = bio_data(bio);
- rq->raw_data_len = bio->bi_size;
rq->data_len = bio->bi_size;
rq->bio = rq->biotail = bio;
for_each_possible_cpu(i)
INIT_LIST_HEAD(&per_cpu(blk_cpu_done, i));
- open_softirq(BLOCK_SOFTIRQ, blk_done_softirq, NULL);
+ open_softirq(BLOCK_SOFTIRQ, blk_done_softirq);
register_hotcpu_notifier(&blk_cpu_notifier);
return 0;
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff