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Update stale libdm/misc/dm-log-userspace.h
The upstream kernel version that this file mirrors has changed, here is the commit message: commit 86a54a4802df10d23ccd655e2083e812fe990243 Author: Jonathan Brassow <jbrassow@redhat.com> Date: Thu Jan 13 19:59:52 2011 +0000 dm log userspace: add version number to comms This patch adds a 'version' field to the 'dm_ulog_request' structure. The 'version' field is taken from a portion of the unused 'padding' field in the 'dm_ulog_request' structure. This was done to avoid changing the size of the structure and possibly disrupting backwards compatibility. The version number will help notify user-space daemons when a change has been made to the kernel/userspace log API. Signed-off-by: Jonathan Brassow <jbrassow@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
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@ -363,13 +363,23 @@
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* various request types above. The remaining 24-bits are currently
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* set to zero and are reserved for future use and compatibility concerns.
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*
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* User-space should always use DM_ULOG_REQUEST_TYPE to aquire the
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* User-space should always use DM_ULOG_REQUEST_TYPE to acquire the
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* request type from the 'request_type' field to maintain forward compatibility.
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*/
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#define DM_ULOG_REQUEST_MASK 0xFF
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#define DM_ULOG_REQUEST_TYPE(request_type) \
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(DM_ULOG_REQUEST_MASK & (request_type))
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/*
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* DM_ULOG_REQUEST_VERSION is incremented when there is a
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* change to the way information is passed between kernel
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* and userspace. This could be a structure change of
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* dm_ulog_request or a change in the way requests are
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* issued/handled. Changes are outlined here:
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* version 1: Initial implementation
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*/
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#define DM_ULOG_REQUEST_VERSION 1
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struct dm_ulog_request {
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/*
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* The local unique identifier (luid) and the universally unique
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@ -383,8 +393,9 @@ struct dm_ulog_request {
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*/
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uint64_t luid;
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char uuid[DM_UUID_LEN];
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char padding[7]; /* Padding because DM_UUID_LEN = 129 */
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char padding[3]; /* Padding because DM_UUID_LEN = 129 */
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uint32_t version; /* See DM_ULOG_REQUEST_VERSION */
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int32_t error; /* Used to report back processing errors */
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uint32_t seq; /* Sequence number for request */
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