diff options
| author | Christoph Hellwig <hch@lst.de> | 2021-11-22 14:06:22 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2021-11-29 06:38:35 -0700 |
| commit | 1ebe2e5f9d68e94c524aba876f27b945669a7879 (patch) | |
| tree | e0de8a0a5eb068a3de89c5cf346730ea9e1349b6 /block | |
| parent | 3b5149ac50970669ee0ddb9629ec77ffd5c0622d (diff) | |
block: remove GENHD_FL_EXT_DEVT
All modern drivers can support extra partitions using the extended
dev_t. In fact except for the ioctl method drivers never even see
partitions in normal operation.
So remove the GENHD_FL_EXT_DEVT and allow extra partitions for all
block devices that do support partitions, and require those that
do not support partitions to explicit disallow them using
GENHD_FL_NO_PART.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20211122130625.1136848-12-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block')
| -rw-r--r-- | block/genhd.c | 6 | ||||
| -rw-r--r-- | block/partitions/core.c | 9 |
2 files changed, 7 insertions, 8 deletions
diff --git a/block/genhd.c b/block/genhd.c index 50a843ee18f6..628632537129 100644 --- a/block/genhd.c +++ b/block/genhd.c @@ -376,7 +376,7 @@ int disk_scan_partitions(struct gendisk *disk, fmode_t mode) { struct block_device *bdev; - if (!disk_part_scan_enabled(disk)) + if (disk->flags & GENHD_FL_NO_PART) return -EINVAL; if (disk->open_partitions) return -EBUSY; @@ -438,7 +438,6 @@ int __must_check device_add_disk(struct device *parent, struct gendisk *disk, return ret; disk->major = BLOCK_EXT_MAJOR; disk->first_minor = ret; - disk->flags |= GENHD_FL_EXT_DEVT; } ret = disk_alloc_events(disk); @@ -872,7 +871,8 @@ static ssize_t disk_ext_range_show(struct device *dev, { struct gendisk *disk = dev_to_disk(dev); - return sprintf(buf, "%d\n", disk_max_parts(disk)); + return sprintf(buf, "%d\n", + (disk->flags & GENHD_FL_NO_PART) ? 1 : DISK_MAX_PARTS); } static ssize_t disk_removable_show(struct device *dev, diff --git a/block/partitions/core.c b/block/partitions/core.c index 520292fee933..c2a1635922b1 100644 --- a/block/partitions/core.c +++ b/block/partitions/core.c @@ -98,13 +98,12 @@ static void bdev_set_nr_sectors(struct block_device *bdev, sector_t sectors) static struct parsed_partitions *allocate_partitions(struct gendisk *hd) { struct parsed_partitions *state; - int nr; + int nr = DISK_MAX_PARTS; state = kzalloc(sizeof(*state), GFP_KERNEL); if (!state) return NULL; - nr = disk_max_parts(hd); state->parts = vzalloc(array_size(nr, sizeof(state->parts[0]))); if (!state->parts) { kfree(state); @@ -326,7 +325,7 @@ static struct block_device *add_partition(struct gendisk *disk, int partno, lockdep_assert_held(&disk->open_mutex); - if (partno >= disk_max_parts(disk)) + if (partno >= DISK_MAX_PARTS) return ERR_PTR(-EINVAL); /* @@ -604,7 +603,7 @@ static int blk_add_partitions(struct gendisk *disk) struct parsed_partitions *state; int ret = -EAGAIN, p; - if (!disk_part_scan_enabled(disk)) + if (disk->flags & GENHD_FL_NO_PART) return 0; state = check_partition(disk); @@ -687,7 +686,7 @@ rescan: * userspace for this particular setup. */ if (invalidate) { - if (disk_part_scan_enabled(disk) || + if (!(disk->flags & GENHD_FL_NO_PART) || !(disk->flags & GENHD_FL_REMOVABLE)) set_capacity(disk, 0); } |