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authorJohannes Berg <johannes.berg@intel.com>2018-09-27 11:28:36 +0200
committerDavid S. Miller <davem@davemloft.net>2018-10-01 23:05:31 -0700
commit33188bd6430ef06d206ae4fda2cc92f14f16fd20 (patch)
treebd3980a02a9896a5a1d60936b451ce40efc44349 /lib
parent3e48be05f3c7eb6f6126939e9d957903c5cfeee5 (diff)
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netlink: add validation function to policy
Add the ability to have an arbitrary validation function attached to a netlink policy that doesn't already use the validation_data pointer in another way. This can be useful to validate for example the content of a binary attribute, like in nl80211 the "(information) elements", which must be valid streams of "u8 type, u8 length, u8 value[length]". Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'lib')
-rw-r--r--lib/nlattr.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/lib/nlattr.c b/lib/nlattr.c
index 5670e4b7dfef..1e900bb414ef 100644
--- a/lib/nlattr.c
+++ b/lib/nlattr.c
@@ -300,6 +300,13 @@ static int validate_nla(const struct nlattr *nla, int maxtype,
if (err)
return err;
break;
+ case NLA_VALIDATE_FUNCTION:
+ if (pt->validate) {
+ err = pt->validate(nla, extack);
+ if (err)
+ return err;
+ }
+ break;
}
return 0;