| Message ID | 20240821125251.1571445-13-idosch@nvidia.com (mailing list archive) |
|---|---|
| State | Accepted |
| Commit | be8b8ded77996cfcd1bb2f1d97b91106d5882877 |
| Delegated to: | Netdev Maintainers |
| Headers | show |
| Series | Unmask upper DSCP bits - part 1 | expand |
On Wed, Aug 21, 2024 at 03:52:51PM +0300, Ido Schimmel wrote: > Unmask the upper DSCP bits when performing source validation and routing > a packet using the same route from a previously processed packet (hint). > In the future, this will allow us to perform the FIB lookup that is > performed as part of source validation according to the full DSCP value. Reviewed-by: Guillaume Nault <gnault@redhat.com>
diff --git a/net/ipv4/route.c b/net/ipv4/route.c index 524b70ab77a0..f6972b24664a 100644 --- a/net/ipv4/route.c +++ b/net/ipv4/route.c @@ -2160,7 +2160,7 @@ int ip_route_use_hint(struct sk_buff *skb, __be32 daddr, __be32 saddr, if (rt->rt_type != RTN_LOCAL) goto skip_validate_source; - tos &= IPTOS_RT_MASK; + tos &= INET_DSCP_MASK; err = fib_validate_source(skb, saddr, daddr, tos, 0, dev, in_dev, &tag); if (err < 0) goto martian_source;
Unmask the upper DSCP bits when performing source validation and routing a packet using the same route from a previously processed packet (hint). In the future, this will allow us to perform the FIB lookup that is performed as part of source validation according to the full DSCP value. No functional changes intended since the upper DSCP bits are masked when comparing against the TOS selectors in FIB rules and routes. Signed-off-by: Ido Schimmel <idosch@nvidia.com> --- net/ipv4/route.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)