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Diffstat (limited to 'include/linux/genhd.h')
-rw-r--r--include/linux/genhd.h27
1 files changed, 9 insertions, 18 deletions
diff --git a/include/linux/genhd.h b/include/linux/genhd.h
index 809aaa32d53c..f364619092cc 100644
--- a/include/linux/genhd.h
+++ b/include/linux/genhd.h
@@ -32,6 +32,7 @@ extern struct class block_class;
#include <linux/string.h>
#include <linux/fs.h>
#include <linux/workqueue.h>
+#include <linux/xarray.h>
#define PARTITION_META_INFO_VOLNAMELTH 64
/*
@@ -116,13 +117,6 @@ enum {
DISK_EVENT_FLAG_UEVENT = 1 << 1,
};
-struct disk_part_tbl {
- struct rcu_head rcu_head;
- int len;
- struct block_device __rcu *last_lookup;
- struct block_device __rcu *part[];
-};
-
struct disk_events;
struct badblocks;
@@ -148,12 +142,7 @@ struct gendisk {
unsigned short events; /* supported events */
unsigned short event_flags; /* flags related to event processing */
- /* Array of pointers to partitions indexed by partno.
- * Protected with matching bdev lock but stat and other
- * non-critical accesses use RCU. Always access through
- * helpers.
- */
- struct disk_part_tbl __rcu *part_tbl;
+ struct xarray part_tbl;
struct block_device *part0;
const struct block_device_operations *fops;
@@ -163,6 +152,7 @@ struct gendisk {
int flags;
unsigned long state;
#define GD_NEED_PART_SCAN 0
+#define GD_READ_ONLY 1
struct kobject *slave_dir;
struct timer_rand_state *random;
@@ -212,10 +202,11 @@ static inline dev_t disk_devt(struct gendisk *disk)
return MKDEV(disk->major, disk->first_minor);
}
+void disk_uevent(struct gendisk *disk, enum kobject_action action);
+
/*
* Smarter partition iterator without context limits.
*/
-#define DISK_PITER_REVERSE (1 << 0) /* iterate in the reverse direction */
#define DISK_PITER_INCL_EMPTY (1 << 1) /* include 0-sized parts */
#define DISK_PITER_INCL_PART0 (1 << 2) /* include partition 0 */
#define DISK_PITER_INCL_EMPTY_PART0 (1 << 3) /* include empty partition 0 */
@@ -223,7 +214,7 @@ static inline dev_t disk_devt(struct gendisk *disk)
struct disk_part_iter {
struct gendisk *disk;
struct block_device *part;
- int idx;
+ unsigned long idx;
unsigned int flags;
};
@@ -231,7 +222,6 @@ extern void disk_part_iter_init(struct disk_part_iter *piter,
struct gendisk *disk, unsigned int flags);
struct block_device *disk_part_iter_next(struct disk_part_iter *piter);
extern void disk_part_iter_exit(struct disk_part_iter *piter);
-extern bool disk_has_partitions(struct gendisk *disk);
/* block/genhd.c */
extern void device_add_disk(struct device *parent, struct gendisk *disk,
@@ -249,11 +239,12 @@ static inline void add_disk_no_queue_reg(struct gendisk *disk)
extern void del_gendisk(struct gendisk *gp);
extern struct block_device *bdget_disk(struct gendisk *disk, int partno);
-extern void set_disk_ro(struct gendisk *disk, int flag);
+void set_disk_ro(struct gendisk *disk, bool read_only);
static inline int get_disk_ro(struct gendisk *disk)
{
- return disk->part0->bd_read_only;
+ return disk->part0->bd_read_only ||
+ test_bit(GD_READ_ONLY, &disk->state);
}
extern void disk_block_events(struct gendisk *disk);