[PATCH 01/14] block: move GENHD_FL_NATIVE_CAPACITY to disk->state

Christoph Hellwig
2021-11-22T13:06:33Z

The flag to indicate an unlocked native capacity is dynamic state,
not a driver capability flag, so move it to disk->state.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
block/partitions/core.c | 15 ++++++---------
include/linux/genhd.h | 8 +-------
2 files changed, 7 insertions(+), 16 deletions(-)

diff --git a/block/partitions/core.c b/block/partitions/core.c
index 334b72ef1d73f..520292fee9339 100644
--- a/block/partitions/core.c
+++ b/block/partitions/core.c
@@ -527,18 +527,15 @@ int bdev_resize_partition(struct gendisk *disk, int partno, sector_t start,

static bool disk_unlock_native_capacity(struct gendisk *disk)
{
- const struct block_device_operations *bdops = disk->fops;
-
- if (bdops->unlock_native_capacity &&
- !(disk->flags & GENHD_FL_NATIVE_CAPACITY)) {
- printk(KERN_CONT "enabling native capacity\n");
- bdops->unlock_native_capacity(disk);
- disk->flags |= GENHD_FL_NATIVE_CAPACITY;
- return true;
- } else {
+ if (!disk->fops->unlock_native_capacity ||
+ test_and_set_bit(GD_NATIVE_CAPACITY, &disk->state)) {
printk(KERN_CONT "truncated\n");
return false;
}
+
+ printk(KERN_CONT "enabling native capacity\n");
+ disk->fops->unlock_native_capacity(disk);
+ return true;
}

void blk_drop_partitions(struct gendisk *disk)
diff --git a/include/linux/genhd.h b/include/linux/genhd.h
index 74c4102631130..e490a71e5e9dd 100644
--- a/include/linux/genhd.h
+++ b/include/linux/genhd.h
@@ -60,12 +60,6 @@ struct partition_meta_info {
* (``BLOCK_EXT_MAJOR``).
* This affects the maximum number of partitions.
*
- * ``GENHD_FL_NATIVE_CAPACITY`` (0x0080): based on information in the
- * partition table, the device's capacity has been extended to its
- * native capacity; i.e. the device has hidden capacity used by one
- * of the partitions (this is a flag used so that native capacity is
- * only ever unlocked once).
- *
* ``GENHD_FL_BLOCK_EVENTS_ON_EXCL_WRITE`` (0x0100): event polling is
* blocked whenever a writer holds an exclusive lock.
*
@@ -86,7 +80,6 @@ struct partition_meta_info {
#define GENHD_FL_CD 0x0008
#define GENHD_FL_SUPPRESS_PARTITION_INFO 0x0020
#define GENHD_FL_EXT_DEVT 0x0040
-#define GENHD_FL_NATIVE_CAPACITY 0x0080
#define GENHD_FL_BLOCK_EVENTS_ON_EXCL_WRITE 0x0100
#define GENHD_FL_NO_PART_SCAN 0x0200
#define GENHD_FL_HIDDEN 0x0400
@@ -140,6 +133,7 @@ struct gendisk {
#define GD_NEED_PART_SCAN 0
#define GD_READ_ONLY 1
#define GD_DEAD 2
+#define GD_NATIVE_CAPACITY 3

struct mutex open_mutex; /* open/close mutex */
unsigned open_partitions; /* number of open partitions */
--
2.30.2