inflight[1] = 0;
}
-/**
- * disk_part_iter_init - initialize partition iterator
- * @piter: iterator to initialize
- * @disk: disk to iterate over
- * @flags: DISK_PITER_* flags
- *
- * Initialize @piter so that it iterates over partitions of @disk.
- *
- * CONTEXT:
- * Don't care.
- */
-void disk_part_iter_init(struct disk_part_iter *piter, struct gendisk *disk,
- unsigned int flags)
-{
- piter->disk = disk;
- piter->part = NULL;
- if (flags & (DISK_PITER_INCL_PART0 | DISK_PITER_INCL_EMPTY_PART0))
- piter->idx = 0;
- else
- piter->idx = 1;
- piter->flags = flags;
-}
-
-/**
- * disk_part_iter_next - proceed iterator to the next partition and return it
- * @piter: iterator of interest
- *
- * Proceed @piter to the next partition and return it.
- *
- * CONTEXT:
- * Don't care.
- */
-struct block_device *disk_part_iter_next(struct disk_part_iter *piter)
-{
- struct block_device *part;
- unsigned long idx;
-
- /* put the last partition */
- disk_part_iter_exit(piter);
-
- rcu_read_lock();
- xa_for_each_start(&piter->disk->part_tbl, idx, part, piter->idx) {
- if (!bdev_nr_sectors(part) &&
- !(piter->flags & DISK_PITER_INCL_EMPTY) &&
- !(piter->flags & DISK_PITER_INCL_EMPTY_PART0 &&
- piter->idx == 0))
- continue;
-
- piter->part = bdgrab(part);
- if (!piter->part)
- continue;
- piter->idx = idx + 1;
- break;
- }
- rcu_read_unlock();
-
- return piter->part;
-}
-
-/**
- * disk_part_iter_exit - finish up partition iteration
- * @piter: iter of interest
- *
- * Called when iteration is over. Cleans up @piter.
- *
- * CONTEXT:
- * Don't care.
- */
-void disk_part_iter_exit(struct disk_part_iter *piter)
-{
- if (piter->part)
- bdput(piter->part);
- piter->part = NULL;
-}
-
/*
* Can be deleted altogether. Later.
*
void disk_uevent(struct gendisk *disk, enum kobject_action action)
{
- struct disk_part_iter piter;
struct block_device *part;
+ unsigned long idx;
+
+ rcu_read_lock();
+ xa_for_each(&disk->part_tbl, idx, part) {
+ if (bdev_is_partition(part) && !bdev_nr_sectors(part))
+ continue;
+ if (!bdgrab(part))
+ continue;
- disk_part_iter_init(&piter, disk, DISK_PITER_INCL_EMPTY_PART0);
- while ((part = disk_part_iter_next(&piter)))
+ rcu_read_unlock();
kobject_uevent(bdev_kobj(part), action);
- disk_part_iter_exit(&piter);
+ bdput(part);
+ rcu_read_lock();
+ }
+ rcu_read_unlock();
}
EXPORT_SYMBOL_GPL(disk_uevent);
}
EXPORT_SYMBOL(device_add_disk_no_queue_reg);
-static void invalidate_partition(struct block_device *bdev)
-{
- fsync_bdev(bdev);
- __invalidate_device(bdev, true);
-
- /*
- * Unhash the bdev inode for this device so that it can't be looked
- * up any more even if openers still hold references to it.
- */
- remove_inode_hash(bdev->bd_inode);
-}
-
/**
* del_gendisk - remove the gendisk
* @disk: the struct gendisk to remove
*/
void del_gendisk(struct gendisk *disk)
{
- struct disk_part_iter piter;
- struct block_device *part;
-
might_sleep();
if (WARN_ON_ONCE(!disk->queue))
*/
down_write(&bdev_lookup_sem);
- /* invalidate stuff */
- disk_part_iter_init(&piter, disk, DISK_PITER_INCL_EMPTY);
- while ((part = disk_part_iter_next(&piter))) {
- invalidate_partition(part);
- delete_partition(part);
- }
- disk_part_iter_exit(&piter);
+ mutex_lock(&disk->part0->bd_mutex);
+ blk_drop_partitions(disk);
+ mutex_unlock(&disk->part0->bd_mutex);
+
+ fsync_bdev(disk->part0);
+ __invalidate_device(disk->part0, true);
+
+ /*
+ * Unhash the bdev inode for this device so that it can't be looked
+ * up any more even if openers still hold references to it.
+ */
+ remove_inode_hash(disk->part0->bd_inode);
- invalidate_partition(disk->part0);
set_capacity(disk, 0);
disk->flags &= ~GENHD_FL_UP;
up_write(&bdev_lookup_sem);
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 disk_part_iter piter;
struct block_device *part;
char name_buf[BDEVNAME_SIZE];
char devt_buf[BDEVT_SIZE];
+ unsigned long idx;
/*
* Don't show empty devices or things that have been
continue;
/*
- * Note, unlike /proc/partitions, I am showing the
- * numbers in hex - the same format as the root=
- * option takes.
+ * Note, unlike /proc/partitions, I am showing the numbers in
+ * hex - the same format as the root= option takes.
*/
- disk_part_iter_init(&piter, disk, DISK_PITER_INCL_PART0);
- while ((part = disk_part_iter_next(&piter))) {
- bool is_part0 = part == disk->part0;
-
- printk("%s%s %10llu %s %s", is_part0 ? "" : " ",
+ rcu_read_lock();
+ xa_for_each(&disk->part_tbl, idx, part) {
+ if (!bdev_nr_sectors(part))
+ continue;
+ printk("%s%s %10llu %s %s",
+ bdev_is_partition(part) ? " " : "",
bdevt_str(part->bd_dev, devt_buf),
bdev_nr_sectors(part) >> 1,
disk_name(disk, part->bd_partno, name_buf),
part->bd_meta_info ?
part->bd_meta_info->uuid : "");
- if (is_part0) {
- if (dev->parent && dev->parent->driver)
- printk(" driver: %s\n",
- dev->parent->driver->name);
- else
- printk(" (driver?)\n");
- } else
+ if (bdev_is_partition(part))
printk("\n");
+ else if (dev->parent && dev->parent->driver)
+ printk(" driver: %s\n",
+ dev->parent->driver->name);
+ else
+ printk(" (driver?)\n");
}
- disk_part_iter_exit(&piter);
+ rcu_read_unlock();
}
class_dev_iter_exit(&iter);
}
static int show_partition(struct seq_file *seqf, void *v)
{
struct gendisk *sgp = v;
- struct disk_part_iter piter;
struct block_device *part;
+ unsigned long idx;
char buf[BDEVNAME_SIZE];
/* Don't show non-partitionable removeable devices or empty devices */
if (sgp->flags & GENHD_FL_SUPPRESS_PARTITION_INFO)
return 0;
- /* show the full disk and all non-0 size partitions of it */
- disk_part_iter_init(&piter, sgp, DISK_PITER_INCL_PART0);
- while ((part = disk_part_iter_next(&piter)))
+ rcu_read_lock();
+ xa_for_each(&sgp->part_tbl, idx, part) {
+ if (!bdev_nr_sectors(part))
+ continue;
seq_printf(seqf, "%4d %7d %10llu %s\n",
MAJOR(part->bd_dev), MINOR(part->bd_dev),
bdev_nr_sectors(part) >> 1,
disk_name(sgp, part->bd_partno, buf));
- disk_part_iter_exit(&piter);
-
+ }
+ rcu_read_unlock();
return 0;
}
static int diskstats_show(struct seq_file *seqf, void *v)
{
struct gendisk *gp = v;
- struct disk_part_iter piter;
struct block_device *hd;
char buf[BDEVNAME_SIZE];
unsigned int inflight;
struct disk_stats stat;
+ unsigned long idx;
/*
if (&disk_to_dev(gp)->kobj.entry == block_class.devices.next)
"\n\n");
*/
- disk_part_iter_init(&piter, gp, DISK_PITER_INCL_EMPTY_PART0);
- while ((hd = disk_part_iter_next(&piter))) {
+ rcu_read_lock();
+ xa_for_each(&gp->part_tbl, idx, hd) {
+ if (bdev_is_partition(hd) && !bdev_nr_sectors(hd))
+ continue;
part_stat_read_all(hd, &stat);
if (queue_is_mq(gp->queue))
inflight = blk_mq_in_flight(gp->queue, hd);
NSEC_PER_MSEC)
);
}
- disk_part_iter_exit(&piter);
+ rcu_read_unlock();
return 0;
}
projects / linux-2.6-microblaze.git / blobdiff