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fanotify: split version into version and metadata_len 

To implement per event type optional headers we are interested in
knowing how long the metadata structure is.  This patch slits the __u32
version field into a __u8 version and a __u16 metadata_len field (with
__u8 left over).  This should allow for backwards compat ABI.

Signed-off-by: Alexey Zaytsev <alexey.zaytsev@gmail.com>
[rewrote descrtion and changed object sizes and ordering - eparis]
Signed-off-by: Eric Paris <eparis@redhat.com>
This commit is contained in:
Alexey Zaytsev 2010-11-22 00:33:03 +00:00 committed by Eric Paris
parent fdbf3ceeb6
commit 62731fa0c8
1 changed files with 4 additions and 2 deletions
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6
include/linux/fanotify.h
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@ -83,11 +83,13 @@
FAN_ALL_PERM_EVENTS |\ FAN_ALL_PERM_EVENTS |\
FAN_Q_OVERFLOW) FAN_Q_OVERFLOW)
#define FANOTIFY_METADATA_VERSION 2 #define FANOTIFY_METADATA_VERSION 3
struct fanotify_event_metadata { struct fanotify_event_metadata {
__u32 event_len; __u32 event_len;
__u32 vers; __u8 vers;
__u8 reserved;
__u16 metadata_len;
__aligned_u64 mask; __aligned_u64 mask;
__s32 fd; __s32 fd;
__s32 pid; __s32 pid;