Mikulas Patocka 62e082430e dm ioctl: fix alignment of event number in the device list ... The size of struct dm_name_list is different on 32-bit and 64-bit kernels (so "(nl + 1)" differs between 32-bit and 64-bit kernels). This mismatch caused some harmless difference in padding when using 32-bit or 64-bit kernel. Commit 23d70c5e52 ("dm ioctl: report event number in DM_LIST_DEVICES") added reporting event number in the output of DM_LIST_DEVICES_CMD. This difference in padding makes it impossible for userspace to determine the location of the event number (the location would be different when running on 32-bit and 64-bit kernels). Fix the padding by using offsetof(struct dm_name_list, name) instead of sizeof(struct dm_name_list) to determine the location of entries. Also, the ioctl version number is incremented to 37 so that userspace can use the version number to determine that the event number is present and correctly located. In addition, a global event is now raised when a DM device is created, removed, renamed or when table is swapped, so that the user can monitor for device changes. Reported-by: Eugene Syromiatnikov <esyr@redhat.com> Fixes: 23d70c5e52 ("dm ioctl: report event number in DM_LIST_DEVICES") Cc: stable@vger.kernel.org # 4.13 Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>		2017-09-25 11:18:29 -04:00
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asm-generic	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace	2017-09-11 18:34:47 -07:00
drm	Merge branch 'drm-vmwgfx-next' of git://people.freedesktop.org/~syeh/repos_linux into drm-next	2017-08-29 10:38:14 +10:00
linux	dm ioctl: fix alignment of event number in the device list	2017-09-25 11:18:29 -04:00
misc	uapi: export all headers under uapi directories	2017-05-11 00:21:54 +09:00
mtd	uapi: export all headers under uapi directories	2017-05-11 00:21:54 +09:00
rdma	IB/core: Add completion queue (cq) object actions	2017-08-31 08:35:13 -04:00
scsi	scsi: cxlflash: Support AFU debug	2017-06-26 15:01:12 -04:00
sound	Merge remote-tracking branch 'asoc/topic/intel' into asoc-next	2017-09-01 12:12:19 +01:00
video	uapi: export all headers under uapi directories	2017-05-11 00:21:54 +09:00
xen	uapi: export all headers under uapi directories	2017-05-11 00:21:54 +09:00