diff options
| author | David S. Miller | 2016-04-19 14:30:10 -0400 |
|---|---|---|
| committer | David S. Miller | 2016-04-19 14:30:10 -0400 |
| commit | 18402843bf88c2e9674e1a3a05c73b7d9b09ee05 (patch) | |
| tree | ec57ed115507f9b2b6bf920575036d0ff5e656ec /include/uapi | |
| parent | b67d1df5ad0c227adc89d2913e933ed4addc5dab (diff) | |
net: Align IFLA_STATS64 attributes properly on architectures that need it.
Since the nlattr header is 4 bytes in size, it can cause the netlink
attribute payload to not be 8-byte aligned.
This is particularly troublesome for IFLA_STATS64 which contains 64-bit
statistic values.
Solve this by creating a dummy IFLA_PAD attribute which has a payload
which is zero bytes in size. When HAVE_EFFICIENT_UNALIGNED_ACCESS is
false, we insert an IFLA_PAD attribute into the netlink response when
necessary such that the IFLA_STATS64 payload will be properly aligned.
With help and suggestions from Eric Dumazet.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/uapi')
| -rw-r--r-- | include/uapi/linux/if_link.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/uapi/linux/if_link.h b/include/uapi/linux/if_link.h index bb3a90b57199..5ffdcb34e35b 100644 --- a/include/uapi/linux/if_link.h +++ b/include/uapi/linux/if_link.h @@ -155,6 +155,7 @@ enum { IFLA_PROTO_DOWN, IFLA_GSO_MAX_SEGS, IFLA_GSO_MAX_SIZE, + IFLA_PAD, __IFLA_MAX }; |