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dm: allow targets to return output from messages they are sent

Could be useful for a target to return stats or other information. If a target does DMEMIT() anything to @result from its .message method then it must return 1 to the caller.

Mike Snitzer committed 8 years ago

Commit 1eb5fa81 parent da5dadb11 files · +21 −12Browse files

Showing the changes to include/uapi/linux (1 of 11 files). Show all

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include/uapi/linux/dm-ioctl.h+2−2
@@ -270,9 +270,9 @@ enum { · 269 unmodified lines
270270 #define DM_DEV_SET_GEOMETRY _IOWR(DM_IOCTL, DM_DEV_SET_GEOMETRY_CMD, struct dm_ioctl)
271271
272272 #define DM_VERSION_MAJOR 4
273−#define DM_VERSION_MINOR 37
273+#define DM_VERSION_MINOR 38
274274 #define DM_VERSION_PATCHLEVEL 0
275−#define DM_VERSION_EXTRA "-ioctl (2017-09-20)"
275+#define DM_VERSION_EXTRA "-ioctl (2018-02-28)"
276276
277277 /* Status bits */
278278 #define DM_READONLY_FLAG (1 << 0) /* In/Out */