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| author |   David S. Miller <davem@davemloft.net> | 2016-04-19 14:30:10 -0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-04-19 14:30:10 -0400 |
| commit | 18402843bf88c2e9674e1a3a05c73b7d9b09ee05 (patch) | |
| tree | ec57ed115507f9b2b6bf920575036d0ff5e656ec /include/net/netlink.h | |
| parent | net: w5100: don't build spi driver without w5100 (diff) | |
| download | linux-dev-18402843bf88c2e9674e1a3a05c73b7d9b09ee05.tar.xz linux-dev-18402843bf88c2e9674e1a3a05c73b7d9b09ee05.zip | |
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/net/netlink.h')
0 files changed, 0 insertions, 0 deletions