diff options
author | Patrick McHardy <kaber@trash.net> | 2007-06-25 14:30:16 -0700 |
---|---|---|
committer | David S. Miller <davem@sunset.davemloft.net> | 2007-07-10 22:15:39 -0700 |
commit | afdc3238ec948531205f5c5f77d2de7bae519c71 (patch) | |
tree | ce69a6ed3095ba5049673340304672381068b3af /lib/extable.c | |
parent | 1092cb219774a82b1f16781aec7b8d4ec727c981 (diff) |
[RTNETLINK]: Add nested compat attribute
Add a nested compat attribute type that can be used to convert
attributes that contain a structure to nested attributes in a
backwards compatible way.
The attribute looks like this:
struct {
[ compat contents ]
struct rtattr {
.rta_len = total size,
.rta_type = type,
} rta;
struct old_structure struct;
[ nested top-level attribute ]
struct rtattr {
.rta_len = nest size,
.rta_type = type,
} nest_attr;
[ optional 0 .. n nested attributes ]
struct rtattr {
.rta_len = private attribute len,
.rta_type = private attribute typ,
} nested_attr;
struct nested_data data;
};
Since both userspace and kernel deal correctly with attributes that are
larger than expected old versions will just parse the compat part and
ignore the rest.
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'lib/extable.c')
0 files changed, 0 insertions, 0 deletions