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block: Move checking GENHD_FL_NO_PART to bdev_add_partition() 

[ Upstream commit 7777f47f2ea64efd1016262e7b59fab34adfb869 ]

Commit 1a721de848 ("block: don't add or resize partition on the disk
with GENHD_FL_NO_PART") prevented all operations about partitions on disks
with GENHD_FL_NO_PART in blkpg_do_ioctl() since they are meaningless.
However, it changed error code in some scenarios. So move checking
GENHD_FL_NO_PART to bdev_add_partition() to eliminate impact.

Fixes: 1a721de848 ("block: don't add or resize partition on the disk with GENHD_FL_NO_PART")
Reported-by: Allison Karlitskaya <allison.karlitskaya@redhat.com>
Closes: https://lore.kernel.org/all/CAOYeF9VsmqKMcQjo1k6YkGNujwN-nzfxY17N3F-CMikE1tYp+w@mail.gmail.com/
Signed-off-by: Li Lingfeng <lilingfeng3@huawei.com>
Reviewed-by: Yu Kuai <yukuai3@huawei.com>
Link: https://lore.kernel.org/r/20240118130401.792757-1-lilingfeng@huaweicloud.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Li Lingfeng 2024-01-18 21:04:01 +08:00 committed by Greg Kroah-Hartman
parent 4b84411165
commit 9564767b67
2 changed files with 5 additions and 2 deletions
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2
block/ioctl.c
View File

@ -20,8 +20,6 @@ static int blkpg_do_ioctl(struct block_device *bdev,
struct blkpg_partition p; struct blkpg_partition p;
sector_t start, length; sector_t start, length;
if (disk->flags & GENHD_FL_NO_PART)
return -EINVAL;
if (!capable(CAP_SYS_ADMIN)) if (!capable(CAP_SYS_ADMIN))
return -EACCES; return -EACCES;
if (copy_from_user(&p, upart, sizeof(struct blkpg_partition))) if (copy_from_user(&p, upart, sizeof(struct blkpg_partition)))

5
block/partitions/core.c
View File

@ -453,6 +453,11 @@ int bdev_add_partition(struct gendisk *disk, int partno, sector_t start,
goto out; goto out;
} }
if (disk->flags & GENHD_FL_NO_PART) {
ret = -EINVAL;
goto out;
}
if (partition_overlaps(disk, start, length, -1)) { if (partition_overlaps(disk, start, length, -1)) {
ret = -EBUSY; ret = -EBUSY;
goto out; goto out;