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openvswitch.h: Note that 64 bit ints are 4-aligned.

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In general, all Netlink 64-bit data may be 4-byte aligned, due to
netlink header and attributes being 4-aligned.

To avoid unaligned access the data should be copied out of the netlink
attribute before access.

Signed-off-by: Jarno Rajahalme <jrajahalme@nicira.com>
Acked-by: Jesse Gross <jesse@nicira.com>
This commit is contained in:
Jarno Rajahalme
2014-04-28 17:31:25 -07:00
parent ea96b766c2
commit 0141456733
1 changed files with 1 additions and 0 deletions
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include/linux/openvswitch.h
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@@ -109,6 +109,7 @@ enum ovs_datapath_attr {
#define OVS_DP_ATTR_MAX (__OVS_DP_ATTR_MAX - 1)
/* All 64-bit integers within Netlink messages are 4-byte aligned only. */
struct ovs_dp_stats {
__u64 n_hit; /* Number of flow table matches. */
__u64 n_missed; /* Number of flow table misses. */