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| author | Patrick McHardy <kaber@trash.net> | 2007-06-25 22:49:35 +0200 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2007-07-11 07:15:38 +0200 |
| commit | 1092cb219774a82b1f16781aec7b8d4ec727c981 (patch) | |
| tree | dddd1d559e08c07b41715d8cf2678ff7d45d5230 /net/netlink/attr.c | |
| parent | [SKBUFF]: Keep track of writable header len of headerless clones (diff) | |
| download | linux-1092cb219774a82b1f16781aec7b8d4ec727c981.tar.xz linux-1092cb219774a82b1f16781aec7b8d4ec727c981.zip | |
[NETLINK]: attr: add nested compat attribute type
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.
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/netlink/attr.c')
| -rw-r--r-- | net/netlink/attr.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/net/netlink/attr.c b/net/netlink/attr.c index c591212793ee..e4d7bed99c2e 100644 --- a/net/netlink/attr.c +++ b/net/netlink/attr.c @@ -72,6 +72,17 @@ static int validate_nla(struct nlattr *nla, int maxtype, return -ERANGE; break; + case NLA_NESTED_COMPAT: + if (attrlen < pt->len) + return -ERANGE; + if (attrlen < NLA_ALIGN(pt->len)) + break; + if (attrlen < NLA_ALIGN(pt->len) + NLA_HDRLEN) + return -ERANGE; + nla = nla_data(nla) + NLA_ALIGN(pt->len); + if (attrlen < NLA_ALIGN(pt->len) + NLA_HDRLEN + nla_len(nla)) + return -ERANGE; + break; default: if (pt->len) minlen = pt->len; |