diff options
| author | Maciej Żenczykowski <maze@google.com> | 2023-12-06 09:36:12 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2023-12-08 10:40:51 +0000 |
| commit | bd4a816752bab609dd6d65ae021387beb9e2ddbd (patch) | |
| tree | 95e81b5605988babb87fe1ecbbe9fe5032124555 /net/ipv6 | |
| parent | e5dc5afff62f3e97e86c3643ec9fcad23de4f2d3 (diff) | |
| download | lwn-bd4a816752bab609dd6d65ae021387beb9e2ddbd.tar.gz lwn-bd4a816752bab609dd6d65ae021387beb9e2ddbd.zip | |
net: ipv6: support reporting otherwise unknown prefix flags in RTM_NEWPREFIX
Lorenzo points out that we effectively clear all unknown
flags from PIO when copying them to userspace in the netlink
RTM_NEWPREFIX notification.
We could fix this one at a time as new flags are defined,
or in one fell swoop - I choose the latter.
We could either define 6 new reserved flags (reserved1..6) and handle
them individually (and rename them as new flags are defined), or we
could simply copy the entire unmodified byte over - I choose the latter.
This unfortunately requires some anonymous union/struct magic,
so we add a static assert on the struct size for a little extra safety.
Cc: David Ahern <dsahern@kernel.org>
Cc: Lorenzo Colitti <lorenzo@google.com>
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6')
| -rw-r--r-- | net/ipv6/addrconf.c | 6 |
1 files changed, 1 insertions, 5 deletions
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c index 3aaea56b5166..2692a7b24c40 100644 --- a/net/ipv6/addrconf.c +++ b/net/ipv6/addrconf.c @@ -6149,11 +6149,7 @@ static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev, pmsg->prefix_len = pinfo->prefix_len; pmsg->prefix_type = pinfo->type; pmsg->prefix_pad3 = 0; - pmsg->prefix_flags = 0; - if (pinfo->onlink) - pmsg->prefix_flags |= IF_PREFIX_ONLINK; - if (pinfo->autoconf) - pmsg->prefix_flags |= IF_PREFIX_AUTOCONF; + pmsg->prefix_flags = pinfo->flags; if (nla_put(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix)) goto nla_put_failure; |