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dm ioctl: introduce flag indicating uevent was generated

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Set a new DM_UEVENT_GENERATED_FLAG when returning from ioctls to
indicate that a uevent was actually generated.  This tells the userspace
caller that it may need to wait for the event to be processed.

Signed-off-by: Peter Rajnoha <prajnoha@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
This commit is contained in:
Peter Rajnoha
2010-03-06 02:32:31 +00:00
committed by Alasdair G Kergon
parent a97f925a32
commit 3abf85b5b5
4 changed files with 25 additions and 14 deletions
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9
include/linux/dm-ioctl.h
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@ -266,9 +266,9 @@ enum {
#define DM_DEV_SET_GEOMETRY _IOWR(DM_IOCTL, DM_DEV_SET_GEOMETRY_CMD, struct dm_ioctl)
#define DM_VERSION_MAJOR 4
#define DM_VERSION_MINOR 16
#define DM_VERSION_MINOR 17
#define DM_VERSION_PATCHLEVEL 0
#define DM_VERSION_EXTRA "-ioctl (2009-11-05)"
#define DM_VERSION_EXTRA "-ioctl (2010-03-05)"
/* Status bits */
#define DM_READONLY_FLAG (1 << 0) /* In/Out */
@ -316,4 +316,9 @@ enum {
*/
#define DM_QUERY_INACTIVE_TABLE_FLAG (1 << 12) /* In */
/*
* If set, a uevent was generated for which the caller may need to wait.
*/
#define DM_UEVENT_GENERATED_FLAG (1 << 13) /* Out */
#endif /* _LINUX_DM_IOCTL_H */