Merge tag 'armsoc-defconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/arm...

[deliverable/linux.git] / net / netfilter / nft_meta.c

diff --git a/net/netfilter/nft_meta.c b/net/netfilter/nft_meta.c
index fe885bf271c5d7f0a1cb20f3ea827d7103cfcb55..16c50b0dd426840f79bda0bb3ebbd28ecb2845e5 100644 (file)
--- a/net/netfilter/nft_meta.c
+++ b/net/netfilter/nft_meta.c
@@ -28,6 +28,8 @@
 
 #include <uapi/linux/netfilter_bridge.h> /* NF_BR_PRE_ROUTING */
 
+static DEFINE_PER_CPU(struct rnd_state, nft_prandom_state);
+
 void nft_meta_get_eval(const struct nft_expr *expr,
                       struct nft_regs *regs,
                       const struct nft_pktinfo *pkt)
@@ -181,6 +183,11 @@ void nft_meta_get_eval(const struct nft_expr *expr,
                *dest = sock_cgroup_classid(&sk->sk_cgrp_data);
                break;
 #endif
+       case NFT_META_PRANDOM: {
+               struct rnd_state *state = this_cpu_ptr(&nft_prandom_state);
+               *dest = prandom_u32_state(state);
+               break;
+       }
        default:
                WARN_ON(1);
                goto err;
@@ -277,6 +284,10 @@ int nft_meta_get_init(const struct nft_ctx *ctx,
        case NFT_META_OIFNAME:
                len = IFNAMSIZ;
                break;
+       case NFT_META_PRANDOM:
+               prandom_init_once(&nft_prandom_state);
+               len = sizeof(u32);
+               break;
        default:
                return -EOPNOTSUPP;
        }