linux/block/partitions
Ming Lei d0f0f1b4c5 block: always remove partitions from blk_drop_partitions()
In theory, when GENHD_FL_NO_PART_SCAN is set, no partitions can be created
on one disk. However, ioctl(BLKPG, BLKPG_ADD_PARTITION) doesn't check
GENHD_FL_NO_PART_SCAN, so partitions still can be added even though
GENHD_FL_NO_PART_SCAN is set.

So far blk_drop_partitions() only removes partitions when disk_part_scan_enabled()
return true. This way can make ghost partition on loop device after changing/clearing
FD in case that PARTSCAN is disabled, such as partitions can be added
via 'parted' on loop disk even though GENHD_FL_NO_PART_SCAN is set.

Fix this issue by always removing partitions in blk_drop_partitions(), and
this way is correct because the current code supposes that no partitions
can be added in case of GENHD_FL_NO_PART_SCAN.

Signed-off-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-07-15 09:23:42 -06:00
..
Kconfig treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
Makefile block: merge partition-generic.c and check.c 2020-03-24 07:57:08 -06:00
acorn.c block: declare all partition detection routines in check.h 2020-03-24 07:57:08 -06:00
aix.c block: declare all partition detection routines in check.h 2020-03-24 07:57:08 -06:00
amiga.c block: declare all partition detection routines in check.h 2020-03-24 07:57:08 -06:00
atari.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
atari.h block: declare all partition detection routines in check.h 2020-03-24 07:57:08 -06:00
check.h block: move block layer internals out of include/linux/genhd.h 2020-03-25 09:50:08 -06:00
cmdline.c block: declare all partition detection routines in check.h 2020-03-24 07:57:08 -06:00
core.c block: always remove partitions from blk_drop_partitions() 2020-07-15 09:23:42 -06:00
efi.c partitions/efi: Fix partition name parsing in GUID partition entry 2020-03-08 10:00:09 +01:00
efi.h Merge branch 'efi-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2020-03-30 16:13:08 -07:00
ibm.c s390/dasd: remove ioctl_by_bdev calls 2020-05-21 08:22:20 -06:00
karma.c block: remove block/partitions/karma.h 2020-03-24 07:57:08 -06:00
ldm.c partitions/ldm: Replace uuid_copy() with import_uuid() where it makes sense 2020-06-18 09:17:54 -06:00
ldm.h block: Replace zero-length array with flexible-array 2020-06-15 23:08:32 -05:00
mac.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mac.h block: declare all partition detection routines in check.h 2020-03-24 07:57:08 -06:00
msdos.c block: move the various x86 Unix label formats out of genhd.h 2020-03-24 07:57:08 -06:00
osf.c block: remove block/partitions/osf.h 2020-03-24 07:57:08 -06:00
sgi.c block: move the *_PARTITION enum out of genhd.h 2020-03-24 07:57:08 -06:00
sun.c block: move the *_PARTITION enum out of genhd.h 2020-03-24 07:57:08 -06:00
sysv68.c block: declare all partition detection routines in check.h 2020-03-24 07:57:08 -06:00
ultrix.c block: declare all partition detection routines in check.h 2020-03-24 07:57:08 -06:00