filter: add XOR operation

Add XOR instruction fo BPF machine. Needed for computing packet hashes.

Signed-off-by: Jiri Pirko <jpirko@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 4 insertions, 0 deletions

diff --git a/net/core/filter.c b/net/core/filter.c
index cfbea889a0eb..5099c4b4a53f 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -315,6 +315,9 @@ load_b:
                 case BPF_S_ANC_CPU:
                         A = raw_smp_processor_id();
                         continue;
+                case BPF_S_ANC_ALU_XOR_X:
+                        A ^= X;
+                        continue;
                 case BPF_S_ANC_NLATTR: {
                         struct nlattr *nla;
 
@@ -559,6 +562,7 @@ int sk_chk_filter(struct sock_filter *filter, unsigned int flen)
                         ANCILLARY(HATYPE);
                         ANCILLARY(RXHASH);
                         ANCILLARY(CPU);
+                        ANCILLARY(ALU_XOR_X);
                         }
                 }
                 ftest->code = code;