if (!blk_fs_request(rq) || !rq->rq_disk)
return;
- cpu = disk_stat_lock();
+ cpu = part_stat_lock();
part = disk_map_sector_rcu(rq->rq_disk, rq->sector);
if (!new_io)
- all_stat_inc(cpu, rq->rq_disk, part, merges[rw], rq->sector);
+ part_stat_inc(cpu, part, merges[rw]);
else {
- disk_round_stats(cpu, rq->rq_disk);
- rq->rq_disk->in_flight++;
- if (part) {
- part_round_stats(cpu, part);
- part->in_flight++;
- }
+ part_round_stats(cpu, part);
+ part_inc_in_flight(part);
}
- disk_stat_unlock();
+ part_stat_unlock();
}
void blk_queue_congestion_threshold(struct request_queue *q)
__elv_add_request(q, req, ELEVATOR_INSERT_SORT, 0);
}
-/*
- * disk_round_stats() - Round off the performance stats on a struct
+static void part_round_stats_single(int cpu, struct hd_struct *part,
+ unsigned long now)
+{
+ if (now == part->stamp)
+ return;
+
+ if (part->in_flight) {
+ __part_stat_add(cpu, part, time_in_queue,
+ part->in_flight * (now - part->stamp));
+ __part_stat_add(cpu, part, io_ticks, (now - part->stamp));
+ }
+ part->stamp = now;
+}
+
+/**
+ * part_round_stats() - Round off the performance stats on a struct
* disk_stats.
*
* The average IO queue length and utilisation statistics are maintained
* /proc/diskstats. This accounts immediately for all queue usage up to
* the current jiffies and restarts the counters again.
*/
-void disk_round_stats(int cpu, struct gendisk *disk)
-{
- unsigned long now = jiffies;
-
- if (now == disk->stamp)
- return;
-
- if (disk->in_flight) {
- disk_stat_add(cpu, disk, time_in_queue,
- disk->in_flight * (now - disk->stamp));
- disk_stat_add(cpu, disk, io_ticks, (now - disk->stamp));
- }
- disk->stamp = now;
-}
-EXPORT_SYMBOL_GPL(disk_round_stats);
-
void part_round_stats(int cpu, struct hd_struct *part)
{
unsigned long now = jiffies;
- if (now == part->stamp)
- return;
-
- if (part->in_flight) {
- part_stat_add(cpu, part, time_in_queue,
- part->in_flight * (now - part->stamp));
- part_stat_add(cpu, part, io_ticks, (now - part->stamp));
- }
- part->stamp = now;
+ if (part->partno)
+ part_round_stats_single(cpu, &part_to_disk(part)->part0, now);
+ part_round_stats_single(cpu, part, now);
}
+EXPORT_SYMBOL_GPL(part_round_stats);
/*
* queue lock must be held
struct hd_struct *part;
int cpu;
- cpu = disk_stat_lock();
+ cpu = part_stat_lock();
part = disk_map_sector_rcu(req->rq_disk, req->sector);
- all_stat_add(cpu, req->rq_disk, part, sectors[rw],
- nr_bytes >> 9, req->sector);
- disk_stat_unlock();
+ part_stat_add(cpu, part, sectors[rw], nr_bytes >> 9);
+ part_stat_unlock();
}
total_bytes = bio_nbytes = 0;
struct hd_struct *part;
int cpu;
- cpu = disk_stat_lock();
+ cpu = part_stat_lock();
part = disk_map_sector_rcu(disk, req->sector);
- all_stat_inc(cpu, disk, part, ios[rw], req->sector);
- all_stat_add(cpu, disk, part, ticks[rw], duration, req->sector);
- disk_round_stats(cpu, disk);
- disk->in_flight--;
- if (part) {
- part_round_stats(cpu, part);
- part->in_flight--;
- }
+ part_stat_inc(cpu, part, ios[rw]);
+ part_stat_add(cpu, part, ticks[rw], duration);
+ part_round_stats(cpu, part);
+ part_dec_in_flight(part);
- disk_stat_unlock();
+ part_stat_unlock();
}
if (req->end_io)
struct hd_struct *part;
int cpu;
- cpu = disk_stat_lock();
+ cpu = part_stat_lock();
part = disk_map_sector_rcu(req->rq_disk, req->sector);
- disk_round_stats(cpu, req->rq_disk);
- req->rq_disk->in_flight--;
- if (part) {
- part_round_stats(cpu, part);
- part->in_flight--;
- }
+ part_round_stats(cpu, part);
+ part_dec_in_flight(part);
- disk_stat_unlock();
+ part_stat_unlock();
}
req->ioprio = ioprio_best(req->ioprio, next->ioprio);
* while preemption is disabled.
*
* RETURNS:
- * Found partition on success, NULL if there's no matching partition.
+ * Found partition on success, part0 is returned if no partition matches
*/
struct hd_struct *disk_map_sector_rcu(struct gendisk *disk, sector_t sector)
{
sector < part->start_sect + part->nr_sects)
return part;
}
- return NULL;
+ return &disk->part0;
}
EXPORT_SYMBOL_GPL(disk_map_sector_rcu);
* numbers in hex - the same format as the root=
* option takes.
*/
- printk("%s %10llu %s",
- bdevt_str(disk_devt(disk), devt_buf),
- (unsigned long long)get_capacity(disk) >> 1,
- disk_name(disk, 0, name_buf));
- if (disk->driverfs_dev != NULL &&
- disk->driverfs_dev->driver != NULL)
- printk(" driver: %s\n",
- disk->driverfs_dev->driver->name);
- else
- printk(" (driver?)\n");
+ disk_part_iter_init(&piter, disk, DISK_PITER_INCL_PART0);
+ while ((part = disk_part_iter_next(&piter))) {
+ bool is_part0 = part == &disk->part0;
- /* now show the partitions */
- disk_part_iter_init(&piter, disk, 0);
- while ((part = disk_part_iter_next(&piter)))
- printk(" %s %10llu %s\n",
+ printk("%s%s %10llu %s", is_part0 ? "" : " ",
bdevt_str(part_devt(part), devt_buf),
(unsigned long long)part->nr_sects >> 1,
disk_name(disk, part->partno, name_buf));
+ if (is_part0) {
+ if (disk->driverfs_dev != NULL &&
+ disk->driverfs_dev->driver != NULL)
+ printk(" driver: %s\n",
+ disk->driverfs_dev->driver->name);
+ else
+ printk(" (driver?)\n");
+ } else
+ printk("\n");
+ }
disk_part_iter_exit(&piter);
}
class_dev_iter_exit(&iter);
return 0;
/* show the full disk and all non-0 size partitions of it */
- seq_printf(seqf, "%4d %7d %10llu %s\n",
- MAJOR(disk_devt(sgp)), MINOR(disk_devt(sgp)),
- (unsigned long long)get_capacity(sgp) >> 1,
- disk_name(sgp, 0, buf));
-
- disk_part_iter_init(&piter, sgp, 0);
+ disk_part_iter_init(&piter, sgp, DISK_PITER_INCL_PART0);
while ((part = disk_part_iter_next(&piter)))
seq_printf(seqf, "%4d %7d %10llu %s\n",
MAJOR(part_devt(part)), MINOR(part_devt(part)),
return sprintf(buf, "%x\n", disk->flags);
}
-static ssize_t disk_stat_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct gendisk *disk = dev_to_disk(dev);
- int cpu;
-
- cpu = disk_stat_lock();
- disk_round_stats(cpu, disk);
- disk_stat_unlock();
- return sprintf(buf,
- "%8lu %8lu %8llu %8u "
- "%8lu %8lu %8llu %8u "
- "%8u %8u %8u"
- "\n",
- disk_stat_read(disk, ios[READ]),
- disk_stat_read(disk, merges[READ]),
- (unsigned long long)disk_stat_read(disk, sectors[READ]),
- jiffies_to_msecs(disk_stat_read(disk, ticks[READ])),
- disk_stat_read(disk, ios[WRITE]),
- disk_stat_read(disk, merges[WRITE]),
- (unsigned long long)disk_stat_read(disk, sectors[WRITE]),
- jiffies_to_msecs(disk_stat_read(disk, ticks[WRITE])),
- disk->in_flight,
- jiffies_to_msecs(disk_stat_read(disk, io_ticks)),
- jiffies_to_msecs(disk_stat_read(disk, time_in_queue)));
-}
-
static DEVICE_ATTR(range, S_IRUGO, disk_range_show, NULL);
static DEVICE_ATTR(ext_range, S_IRUGO, disk_ext_range_show, NULL);
static DEVICE_ATTR(removable, S_IRUGO, disk_removable_show, NULL);
static DEVICE_ATTR(ro, S_IRUGO, disk_ro_show, NULL);
static DEVICE_ATTR(size, S_IRUGO, part_size_show, NULL);
static DEVICE_ATTR(capability, S_IRUGO, disk_capability_show, NULL);
-static DEVICE_ATTR(stat, S_IRUGO, disk_stat_show, NULL);
+static DEVICE_ATTR(stat, S_IRUGO, part_stat_show, NULL);
#ifdef CONFIG_FAIL_MAKE_REQUEST
static struct device_attribute dev_attr_fail =
__ATTR(make-it-fail, S_IRUGO|S_IWUSR, part_fail_show, part_fail_store);
kfree(disk->random);
kfree(disk->__part);
- free_disk_stats(disk);
+ free_part_stats(&disk->part0);
kfree(disk);
}
struct class block_class = {
"\n\n");
*/
- cpu = disk_stat_lock();
- disk_round_stats(cpu, gp);
- disk_stat_unlock();
- seq_printf(seqf, "%4d %7d %s %lu %lu %llu %u %lu %lu %llu %u %u %u %u\n",
- MAJOR(disk_devt(gp)), MINOR(disk_devt(gp)),
- disk_name(gp, 0, buf),
- disk_stat_read(gp, ios[0]), disk_stat_read(gp, merges[0]),
- (unsigned long long)disk_stat_read(gp, sectors[0]),
- jiffies_to_msecs(disk_stat_read(gp, ticks[0])),
- disk_stat_read(gp, ios[1]), disk_stat_read(gp, merges[1]),
- (unsigned long long)disk_stat_read(gp, sectors[1]),
- jiffies_to_msecs(disk_stat_read(gp, ticks[1])),
- gp->in_flight,
- jiffies_to_msecs(disk_stat_read(gp, io_ticks)),
- jiffies_to_msecs(disk_stat_read(gp, time_in_queue)));
-
- /* now show all non-0 size partitions of it */
- disk_part_iter_init(&piter, gp, 0);
+ disk_part_iter_init(&piter, gp, DISK_PITER_INCL_PART0);
while ((hd = disk_part_iter_next(&piter))) {
- cpu = disk_stat_lock();
+ cpu = part_stat_lock();
part_round_stats(cpu, hd);
- disk_stat_unlock();
+ part_stat_unlock();
seq_printf(seqf, "%4d %7d %s %lu %lu %llu "
"%u %lu %lu %llu %u %u %u %u\n",
MAJOR(part_devt(hd)), MINOR(part_devt(hd)),
int tot_minors = minors + ext_minors;
int size = tot_minors * sizeof(struct hd_struct *);
- if (!init_disk_stats(disk)) {
+ if (!init_part_stats(&disk->part0)) {
kfree(disk);
return NULL;
}
disk->__part = kmalloc_node(size, GFP_KERNEL | __GFP_ZERO,
node_id);
if (!disk->__part) {
- free_disk_stats(disk);
+ free_part_stats(&disk->part0);
kfree(disk);
return NULL;
}
struct hd_struct *part;
int cpu;
- cpu = disk_stat_lock();
+ cpu = part_stat_lock();
part = disk_map_sector_rcu(disk, sector);
- all_stat_inc(cpu, disk, part, ios[rw], sector);
- all_stat_add(cpu, disk, part, ticks[rw], duration, sector);
- all_stat_add(cpu, disk, part, sectors[rw], n_sect, sector);
- all_stat_add(cpu, disk, part, io_ticks, duration, sector);
+ part_stat_inc(cpu, part, ios[rw]);
+ part_stat_add(cpu, part, ticks[rw], duration);
+ part_stat_add(cpu, part, sectors[rw], n_sect);
+ part_stat_add(cpu, part, io_ticks, duration);
- disk_stat_unlock();
+ part_stat_unlock();
}
void
io->start_time = jiffies;
- cpu = disk_stat_lock();
- disk_round_stats(cpu, dm_disk(md));
- disk_stat_unlock();
- dm_disk(md)->in_flight = atomic_inc_return(&md->pending);
+ cpu = part_stat_lock();
+ part_round_stats(cpu, &dm_disk(md)->part0);
+ part_stat_unlock();
+ dm_disk(md)->part0.in_flight = atomic_inc_return(&md->pending);
}
static int end_io_acct(struct dm_io *io)
int pending, cpu;
int rw = bio_data_dir(bio);
- cpu = disk_stat_lock();
- disk_round_stats(cpu, dm_disk(md));
- disk_stat_add(cpu, dm_disk(md), ticks[rw], duration);
- disk_stat_unlock();
+ cpu = part_stat_lock();
+ part_round_stats(cpu, &dm_disk(md)->part0);
+ part_stat_add(cpu, &dm_disk(md)->part0, ticks[rw], duration);
+ part_stat_unlock();
- dm_disk(md)->in_flight = pending = atomic_dec_return(&md->pending);
+ dm_disk(md)->part0.in_flight = pending =
+ atomic_dec_return(&md->pending);
return !pending;
}
down_read(&md->io_lock);
- cpu = disk_stat_lock();
- disk_stat_inc(cpu, dm_disk(md), ios[rw]);
- disk_stat_add(cpu, dm_disk(md), sectors[rw], bio_sectors(bio));
- disk_stat_unlock();
+ cpu = part_stat_lock();
+ part_stat_inc(cpu, &dm_disk(md)->part0, ios[rw]);
+ part_stat_add(cpu, &dm_disk(md)->part0, sectors[rw], bio_sectors(bio));
+ part_stat_unlock();
/*
* If we're suspended we have to queue
return 0;
}
- cpu = disk_stat_lock();
- disk_stat_inc(cpu, mddev->gendisk, ios[rw]);
- disk_stat_add(cpu, mddev->gendisk, sectors[rw], bio_sectors(bio));
- disk_stat_unlock();
+ cpu = part_stat_lock();
+ part_stat_inc(cpu, &mddev->gendisk->part0, ios[rw]);
+ part_stat_add(cpu, &mddev->gendisk->part0, sectors[rw],
+ bio_sectors(bio));
+ part_stat_unlock();
tmp_dev = which_dev(mddev, bio->bi_sector);
block = bio->bi_sector >> 1;
rcu_read_lock();
rdev_for_each_rcu(rdev, mddev) {
struct gendisk *disk = rdev->bdev->bd_contains->bd_disk;
- curr_events = disk_stat_read(disk, sectors[0]) +
- disk_stat_read(disk, sectors[1]) -
+ curr_events = part_stat_read(&disk->part0, sectors[0]) +
+ part_stat_read(&disk->part0, sectors[1]) -
atomic_read(&disk->sync_io);
/* sync IO will cause sync_io to increase before the disk_stats
* as sync_io is counted when a request starts, and
mp_bh->master_bio = bio;
mp_bh->mddev = mddev;
- cpu = disk_stat_lock();
- disk_stat_inc(cpu, mddev->gendisk, ios[rw]);
- disk_stat_add(cpu, mddev->gendisk, sectors[rw], bio_sectors(bio));
- disk_stat_unlock();
+ cpu = part_stat_lock();
+ part_stat_inc(cpu, &mddev->gendisk->part0, ios[rw]);
+ part_stat_add(cpu, &mddev->gendisk->part0, sectors[rw],
+ bio_sectors(bio));
+ part_stat_unlock();
mp_bh->path = multipath_map(conf);
if (mp_bh->path < 0) {
return 0;
}
- cpu = disk_stat_lock();
- disk_stat_inc(cpu, mddev->gendisk, ios[rw]);
- disk_stat_add(cpu, mddev->gendisk, sectors[rw], bio_sectors(bio));
- disk_stat_unlock();
+ cpu = part_stat_lock();
+ part_stat_inc(cpu, &mddev->gendisk->part0, ios[rw]);
+ part_stat_add(cpu, &mddev->gendisk->part0, sectors[rw],
+ bio_sectors(bio));
+ part_stat_unlock();
chunk_size = mddev->chunk_size >> 10;
chunk_sects = mddev->chunk_size >> 9;
bitmap = mddev->bitmap;
- cpu = disk_stat_lock();
- disk_stat_inc(cpu, mddev->gendisk, ios[rw]);
- disk_stat_add(cpu, mddev->gendisk, sectors[rw], bio_sectors(bio));
- disk_stat_unlock();
+ cpu = part_stat_lock();
+ part_stat_inc(cpu, &mddev->gendisk->part0, ios[rw]);
+ part_stat_add(cpu, &mddev->gendisk->part0, sectors[rw],
+ bio_sectors(bio));
+ part_stat_unlock();
/*
* make_request() can abort the operation when READA is being
*/
wait_barrier(conf);
- cpu = disk_stat_lock();
- disk_stat_inc(cpu, mddev->gendisk, ios[rw]);
- disk_stat_add(cpu, mddev->gendisk, sectors[rw], bio_sectors(bio));
- disk_stat_unlock();
+ cpu = part_stat_lock();
+ part_stat_inc(cpu, &mddev->gendisk->part0, ios[rw]);
+ part_stat_add(cpu, &mddev->gendisk->part0, sectors[rw],
+ bio_sectors(bio));
+ part_stat_unlock();
r10_bio = mempool_alloc(conf->r10bio_pool, GFP_NOIO);
md_write_start(mddev, bi);
- cpu = disk_stat_lock();
- disk_stat_inc(cpu, mddev->gendisk, ios[rw]);
- disk_stat_add(cpu, mddev->gendisk, sectors[rw], bio_sectors(bi));
- disk_stat_unlock();
+ cpu = part_stat_lock();
+ part_stat_inc(cpu, &mddev->gendisk->part0, ios[rw]);
+ part_stat_add(cpu, &mddev->gendisk->part0, sectors[rw],
+ bio_sectors(bi));
+ part_stat_unlock();
if (rw == READ &&
mddev->reshape_position == MaxSector &&
return sprintf(buf, "%llu\n",(unsigned long long)p->nr_sects);
}
-static ssize_t part_stat_show(struct device *dev,
- struct device_attribute *attr, char *buf)
+ssize_t part_stat_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
{
struct hd_struct *p = dev_to_part(dev);
int cpu;
- cpu = disk_stat_lock();
+ cpu = part_stat_lock();
part_round_stats(cpu, p);
- disk_stat_unlock();
+ part_stat_unlock();
return sprintf(buf,
"%8lu %8lu %8llu %8u "
"%8lu %8lu %8llu %8u "
set_capacity(disk, 0);
disk->flags &= ~GENHD_FL_UP;
unlink_gendisk(disk);
- disk_stat_set_all(disk, 0);
- disk->stamp = 0;
+ part_stat_set_all(&disk->part0, 0);
+ disk->part0.stamp = 0;
kobject_put(disk->part0.holder_dir);
kobject_put(disk->slave_dir);
struct timer_rand_state *random;
atomic_t sync_io; /* RAID */
- unsigned long stamp;
- int in_flight;
-#ifdef CONFIG_SMP
- struct disk_stats *dkstats;
-#else
- struct disk_stats dkstats;
-#endif
struct work_struct async_notify;
#ifdef CONFIG_BLK_DEV_INTEGRITY
struct blk_integrity *integrity;
* internal use only.
*/
#ifdef CONFIG_SMP
-#define disk_stat_lock() ({ rcu_read_lock(); get_cpu(); })
-#define disk_stat_unlock() do { put_cpu(); rcu_read_unlock(); } while (0)
-
-#define disk_stat_add(cpu, gendiskp, field, addnd) \
- (per_cpu_ptr(gendiskp->dkstats, cpu)->field += addnd)
-
-#define disk_stat_read(gendiskp, field) \
-({ \
- typeof(gendiskp->dkstats->field) res = 0; \
- int i; \
- for_each_possible_cpu(i) \
- res += per_cpu_ptr(gendiskp->dkstats, i)->field; \
- res; \
-})
-
-static inline void disk_stat_set_all(struct gendisk *gendiskp, int value)
-{
- int i;
-
- for_each_possible_cpu(i)
- memset(per_cpu_ptr(gendiskp->dkstats, i), value,
- sizeof(struct disk_stats));
-}
+#define part_stat_lock() ({ rcu_read_lock(); get_cpu(); })
+#define part_stat_unlock() do { put_cpu(); rcu_read_unlock(); } while (0)
-#define part_stat_add(cpu, part, field, addnd) \
- (per_cpu_ptr(part->dkstats, cpu)->field += addnd)
-
-#define all_stat_add(cpu, gendiskp, part, field, addnd, sector) \
-({ \
- if (part) \
- part_stat_add(cpu, part, field, addnd); \
- disk_stat_add(cpu, gendiskp, field, addnd); \
-})
+#define __part_stat_add(cpu, part, field, addnd) \
+ (per_cpu_ptr((part)->dkstats, (cpu))->field += (addnd))
#define part_stat_read(part, field) \
({ \
- typeof(part->dkstats->field) res = 0; \
+ typeof((part)->dkstats->field) res = 0; \
int i; \
for_each_possible_cpu(i) \
- res += per_cpu_ptr(part->dkstats, i)->field; \
+ res += per_cpu_ptr((part)->dkstats, i)->field; \
res; \
})
sizeof(struct disk_stats));
}
-#else /* !CONFIG_SMP */
-#define disk_stat_lock() ({ rcu_read_lock(); 0; })
-#define disk_stat_unlock() rcu_read_unlock()
-
-#define disk_stat_add(cpu, gendiskp, field, addnd) \
- (gendiskp->dkstats.field += addnd)
-#define disk_stat_read(gendiskp, field) (gendiskp->dkstats.field)
-
-static inline void disk_stat_set_all(struct gendisk *gendiskp, int value)
+static inline int init_part_stats(struct hd_struct *part)
{
- memset(&gendiskp->dkstats, value, sizeof (struct disk_stats));
+ part->dkstats = alloc_percpu(struct disk_stats);
+ if (!part->dkstats)
+ return 0;
+ return 1;
}
-#define part_stat_add(cpu, part, field, addnd) \
- (part->dkstats.field += addnd)
-
-#define all_stat_add(cpu, gendiskp, part, field, addnd, sector) \
-({ \
- if (part) \
- part_stat_add(cpu, part, field, addnd); \
- disk_stat_add(cpu, gendiskp, field, addnd); \
-})
-
-#define part_stat_read(part, field) (part->dkstats.field)
-
-static inline void part_stat_set_all(struct hd_struct *part, int value)
+static inline void free_part_stats(struct hd_struct *part)
{
- memset(&part->dkstats, value, sizeof(struct disk_stats));
+ free_percpu(part->dkstats);
}
-#endif /* CONFIG_SMP */
-
-#define disk_stat_dec(cpu, gendiskp, field) \
- disk_stat_add(cpu, gendiskp, field, -1)
-#define disk_stat_inc(cpu, gendiskp, field) \
- disk_stat_add(cpu, gendiskp, field, 1)
-#define disk_stat_sub(cpu, gendiskp, field, subnd) \
- disk_stat_add(cpu, gendiskp, field, -subnd)
-
-#define part_stat_dec(cpu, gendiskp, field) \
- part_stat_add(cpu, gendiskp, field, -1)
-#define part_stat_inc(cpu, gendiskp, field) \
- part_stat_add(cpu, gendiskp, field, 1)
-#define part_stat_sub(cpu, gendiskp, field, subnd) \
- part_stat_add(cpu, gendiskp, field, -subnd)
+#else /* !CONFIG_SMP */
+#define part_stat_lock() ({ rcu_read_lock(); 0; })
+#define part_stat_unlock() rcu_read_unlock()
-#define all_stat_dec(cpu, gendiskp, field, sector) \
- all_stat_add(cpu, gendiskp, field, -1, sector)
-#define all_stat_inc(cpu, gendiskp, part, field, sector) \
- all_stat_add(cpu, gendiskp, part, field, 1, sector)
-#define all_stat_sub(cpu, gendiskp, part, field, subnd, sector) \
- all_stat_add(cpu, gendiskp, part, field, -subnd, sector)
+#define __part_stat_add(cpu, part, field, addnd) \
+ ((part)->dkstats.field += addnd)
-/* Inlines to alloc and free disk stats in struct gendisk */
-#ifdef CONFIG_SMP
-static inline int init_disk_stats(struct gendisk *disk)
-{
- disk->dkstats = alloc_percpu(struct disk_stats);
- if (!disk->dkstats)
- return 0;
- return 1;
-}
+#define part_stat_read(part, field) ((part)->dkstats.field)
-static inline void free_disk_stats(struct gendisk *disk)
+static inline void part_stat_set_all(struct hd_struct *part, int value)
{
- free_percpu(disk->dkstats);
+ memset(&part->dkstats, value, sizeof(struct disk_stats));
}
static inline int init_part_stats(struct hd_struct *part)
{
- part->dkstats = alloc_percpu(struct disk_stats);
- if (!part->dkstats)
- return 0;
return 1;
}
static inline void free_part_stats(struct hd_struct *part)
{
- free_percpu(part->dkstats);
}
-#else /* CONFIG_SMP */
-static inline int init_disk_stats(struct gendisk *disk)
-{
- return 1;
-}
+#endif /* CONFIG_SMP */
-static inline void free_disk_stats(struct gendisk *disk)
-{
-}
+#define part_stat_add(cpu, part, field, addnd) do { \
+ __part_stat_add((cpu), (part), field, addnd); \
+ if ((part)->partno) \
+ __part_stat_add((cpu), &part_to_disk((part))->part0, \
+ field, addnd); \
+} while (0)
-static inline int init_part_stats(struct hd_struct *part)
+#define part_stat_dec(cpu, gendiskp, field) \
+ part_stat_add(cpu, gendiskp, field, -1)
+#define part_stat_inc(cpu, gendiskp, field) \
+ part_stat_add(cpu, gendiskp, field, 1)
+#define part_stat_sub(cpu, gendiskp, field, subnd) \
+ part_stat_add(cpu, gendiskp, field, -subnd)
+
+static inline void part_inc_in_flight(struct hd_struct *part)
{
- return 1;
+ part->in_flight++;
+ if (part->partno)
+ part_to_disk(part)->part0.in_flight++;
}
-static inline void free_part_stats(struct hd_struct *part)
+static inline void part_dec_in_flight(struct hd_struct *part)
{
+ part->in_flight--;
+ if (part->partno)
+ part_to_disk(part)->part0.in_flight--;
}
-#endif /* CONFIG_SMP */
/* drivers/block/ll_rw_blk.c */
-extern void disk_round_stats(int cpu, struct gendisk *disk);
extern void part_round_stats(int cpu, struct hd_struct *part);
/* drivers/block/genhd.c */
extern ssize_t part_size_show(struct device *dev,
struct device_attribute *attr, char *buf);
+extern ssize_t part_stat_show(struct device *dev,
+ struct device_attribute *attr, char *buf);
#ifdef CONFIG_FAIL_MAKE_REQUEST
extern ssize_t part_fail_show(struct device *dev,
struct device_attribute *attr, char *buf);
git://ftp.safe.ca / safe / jmp / linux-2.6 / commitdiff