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Diffstat (limited to 'block/genhd.c')
-rw-r--r--block/genhd.c90
1 files changed, 26 insertions, 64 deletions
diff --git a/block/genhd.c b/block/genhd.c
index 2d34dd2da4e9..0fabfc90b8e4 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -106,13 +106,14 @@ const char *bdevname(struct block_device *bdev, char *buf)
}
EXPORT_SYMBOL(bdevname);
-static void part_stat_read_all(struct hd_struct *part, struct disk_stats *stat)
+static void part_stat_read_all(struct block_device *part,
+ struct disk_stats *stat)
{
int cpu;
memset(stat, 0, sizeof(struct disk_stats));
for_each_possible_cpu(cpu) {
- struct disk_stats *ptr = per_cpu_ptr(part->bdev->bd_stats, cpu);
+ struct disk_stats *ptr = per_cpu_ptr(part->bd_stats, cpu);
int group;
for (group = 0; group < NR_STAT_GROUPS; group++) {
@@ -168,39 +169,6 @@ struct block_device *__disk_get_part(struct gendisk *disk, int partno)
}
/**
- * disk_get_part - get partition
- * @disk: disk to look partition from
- * @partno: partition number
- *
- * Look for partition @partno from @disk. If found, increment
- * reference count and return it.
- *
- * CONTEXT:
- * Don't care.
- *
- * RETURNS:
- * Pointer to the found partition on success, NULL if not found.
- */
-struct hd_struct *disk_get_part(struct gendisk *disk, int partno)
-{
- struct block_device *bdev;
- struct hd_struct *part;
-
- rcu_read_lock();
- bdev = __disk_get_part(disk, partno);
- if (!bdev)
- goto fail;
- part = bdev->bd_part;
- if (!kobject_get_unless_zero(&part_to_dev(part)->kobj))
- goto fail;
- rcu_read_unlock();
- return part;
-fail:
- rcu_read_unlock();
- return NULL;
-}
-
-/**
* disk_part_iter_init - initialize partition iterator
* @piter: iterator to initialize
* @disk: disk to iterate over
@@ -859,7 +827,7 @@ void del_gendisk(struct gendisk *disk)
DISK_PITER_INCL_EMPTY | DISK_PITER_REVERSE);
while ((part = disk_part_iter_next(&piter))) {
invalidate_partition(part);
- delete_partition(part->bd_part);
+ delete_partition(part);
}
disk_part_iter_exit(&piter);
@@ -952,13 +920,13 @@ void blk_request_module(dev_t devt)
*/
struct block_device *bdget_disk(struct gendisk *disk, int partno)
{
- struct hd_struct *part;
struct block_device *bdev = NULL;
- part = disk_get_part(disk, partno);
- if (part)
- bdev = bdget_part(part);
- disk_put_part(part);
+ rcu_read_lock();
+ bdev = __disk_get_part(disk, partno);
+ if (bdev && !bdgrab(bdev))
+ bdev = NULL;
+ rcu_read_unlock();
return bdev;
}
@@ -1175,24 +1143,22 @@ static ssize_t disk_ro_show(struct device *dev,
ssize_t part_size_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
- struct hd_struct *p = dev_to_part(dev);
-
- return sprintf(buf, "%llu\n", bdev_nr_sectors(p->bdev));
+ return sprintf(buf, "%llu\n", bdev_nr_sectors(dev_to_bdev(dev)));
}
ssize_t part_stat_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
- struct hd_struct *p = dev_to_part(dev);
- struct request_queue *q = part_to_disk(p)->queue;
+ struct block_device *bdev = dev_to_bdev(dev);
+ struct request_queue *q = bdev->bd_disk->queue;
struct disk_stats stat;
unsigned int inflight;
- part_stat_read_all(p, &stat);
+ part_stat_read_all(bdev, &stat);
if (queue_is_mq(q))
- inflight = blk_mq_in_flight(q, p->bdev);
+ inflight = blk_mq_in_flight(q, bdev);
else
- inflight = part_in_flight(p->bdev);
+ inflight = part_in_flight(bdev);
return sprintf(buf,
"%8lu %8lu %8llu %8u "
@@ -1227,14 +1193,14 @@ ssize_t part_stat_show(struct device *dev,
ssize_t part_inflight_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
- struct hd_struct *p = dev_to_part(dev);
- struct request_queue *q = part_to_disk(p)->queue;
+ struct block_device *bdev = dev_to_bdev(dev);
+ struct request_queue *q = bdev->bd_disk->queue;
unsigned int inflight[2];
if (queue_is_mq(q))
- blk_mq_in_flight_rw(q, p->bdev, inflight);
+ blk_mq_in_flight_rw(q, bdev, inflight);
else
- part_in_flight_rw(p->bdev, inflight);
+ part_in_flight_rw(bdev, inflight);
return sprintf(buf, "%8u %8u\n", inflight[0], inflight[1]);
}
@@ -1282,20 +1248,17 @@ static DEVICE_ATTR(badblocks, 0644, disk_badblocks_show, disk_badblocks_store);
ssize_t part_fail_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
- struct hd_struct *p = dev_to_part(dev);
-
- return sprintf(buf, "%d\n", p->bdev->bd_make_it_fail);
+ return sprintf(buf, "%d\n", dev_to_bdev(dev)->bd_make_it_fail);
}
ssize_t part_fail_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
- struct hd_struct *p = dev_to_part(dev);
int i;
if (count > 0 && sscanf(buf, "%d", &i) > 0)
- p->bdev->bd_make_it_fail = i;
+ dev_to_bdev(dev)->bd_make_it_fail = i;
return count;
}
@@ -1505,7 +1468,7 @@ static int diskstats_show(struct seq_file *seqf, void *v)
disk_part_iter_init(&piter, gp, DISK_PITER_INCL_EMPTY_PART0);
while ((hd = disk_part_iter_next(&piter))) {
- part_stat_read_all(hd->bd_part, &stat);
+ part_stat_read_all(hd, &stat);
if (queue_is_mq(gp->queue))
inflight = blk_mq_in_flight(gp->queue, hd);
else
@@ -1577,7 +1540,7 @@ dev_t blk_lookup_devt(const char *name, int partno)
class_dev_iter_init(&iter, &block_class, NULL, &disk_type);
while ((dev = class_dev_iter_next(&iter))) {
struct gendisk *disk = dev_to_disk(dev);
- struct hd_struct *part;
+ struct block_device *part;
if (strcmp(dev_name(dev), name))
continue;
@@ -1590,13 +1553,12 @@ dev_t blk_lookup_devt(const char *name, int partno)
MINOR(dev->devt) + partno);
break;
}
- part = disk_get_part(disk, partno);
+ part = bdget_disk(disk, partno);
if (part) {
- devt = part_devt(part);
- disk_put_part(part);
+ devt = part->bd_dev;
+ bdput(part);
break;
}
- disk_put_part(part);
}
class_dev_iter_exit(&iter);
return devt;
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-26 21:25:25 +0300