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| author | Eric W. Biederman <ebiederm@xmission.com> | 2011-01-29 17:15:56 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-01-30 10:14:38 +0100 |
| commit | 709b46e8d90badda1898caea50483c12af178e96 (patch) | |
| tree | 799b57704dda3684777fb57a6e413dabac78858c /net/rds/ib_stats.c | |
| parent | net: Fix ip link add netns oops (diff) | |
| download | linux-709b46e8d90badda1898caea50483c12af178e96.tar.xz linux-709b46e8d90badda1898caea50483c12af178e96.zip | |
net: Add compat ioctl support for the ipv4 multicast ioctl SIOCGETSGCNT
SIOCGETSGCNT is not a unique ioctl value as it it maps tio SIOCPROTOPRIVATE +1,
which unfortunately means the existing infrastructure for compat networking
ioctls is insufficient. A trivial compact ioctl implementation would conflict
with:
SIOCAX25ADDUID
SIOCAIPXPRISLT
SIOCGETSGCNT_IN6
SIOCGETSGCNT
SIOCRSSCAUSE
SIOCX25SSUBSCRIP
SIOCX25SDTEFACILITIES
To make this work I have updated the compat_ioctl decode path to mirror the
the normal ioctl decode path. I have added an ipv4 inet_compat_ioctl function
so that I can have ipv4 specific compat ioctls. I have added a compat_ioctl
function into struct proto so I can break out ioctls by which kind of ip socket
I am using. I have added a compat_raw_ioctl function because SIOCGETSGCNT only
works on raw sockets. I have added a ipmr_compat_ioctl that mirrors the normal
ipmr_ioctl.
This was necessary because unfortunately the struct layout for the SIOCGETSGCNT
has unsigned longs in it so changes between 32bit and 64bit kernels.
This change was sufficient to run a 32bit ip multicast routing daemon on a
64bit kernel.
Reported-by: Bill Fenner <fenner@aristanetworks.com>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/rds/ib_stats.c')
0 files changed, 0 insertions, 0 deletions