5 files changed, 36 insertions, 0 deletions

diff --git a/include/linux/bpf.h b/include/linux/bpf.h
index 80f2e0fc3d02..30bfd331882a 100644
--- a/include/linux/bpf.h
+++ b/include/linux/bpf.h
@@ -154,4 +154,7 @@ extern const struct bpf_func_proto bpf_map_lookup_elem_proto;
 extern const struct bpf_func_proto bpf_map_update_elem_proto;
 extern const struct bpf_func_proto bpf_map_delete_elem_proto;
 
+extern const struct bpf_func_proto bpf_get_prandom_u32_proto;
+extern const struct bpf_func_proto bpf_get_smp_processor_id_proto;
+
 #endif /* _LINUX_BPF_H */
diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h
index 3fa1af8a58d7..de1f63668daf 100644
--- a/include/uapi/linux/bpf.h
+++ b/include/uapi/linux/bpf.h
@@ -165,6 +165,8 @@ enum bpf_func_id {
         BPF_FUNC_map_lookup_elem, /* void *map_lookup_elem(&map, &key) */
         BPF_FUNC_map_update_elem, /* int map_update_elem(&map, &key, &value, flags) */
         BPF_FUNC_map_delete_elem, /* int map_delete_elem(&map, &key) */
+        BPF_FUNC_get_prandom_u32, /* u32 prandom_u32(void) */
+        BPF_FUNC_get_smp_processor_id, /* u32 raw_smp_processor_id(void) */
         __BPF_FUNC_MAX_ID,
 };
 
diff --git a/kernel/bpf/core.c b/kernel/bpf/core.c
index 50603aec766a..4139a0f8b558 100644
--- a/kernel/bpf/core.c
+++ b/kernel/bpf/core.c
@@ -661,6 +661,9 @@ const struct bpf_func_proto bpf_map_lookup_elem_proto __weak;
 const struct bpf_func_proto bpf_map_update_elem_proto __weak;
 const struct bpf_func_proto bpf_map_delete_elem_proto __weak;
 
+const struct bpf_func_proto bpf_get_prandom_u32_proto __weak;
+const struct bpf_func_proto bpf_get_smp_processor_id_proto __weak;
+
 /* To execute LD_ABS/LD_IND instructions __bpf_prog_run() may call
  * skb_copy_bits(), so provide a weak definition of it for NET-less config.
  */
diff --git a/kernel/bpf/helpers.c b/kernel/bpf/helpers.c
index a3c7701a8b5e..bd7f5988ed9c 100644
--- a/kernel/bpf/helpers.c
+++ b/kernel/bpf/helpers.c
@@ -11,6 +11,8 @@
  */
 #include <linux/bpf.h>
 #include <linux/rcupdate.h>
+#include <linux/random.h>
+#include <linux/smp.h>
 
 /* If kernel subsystem is allowing eBPF programs to call this function,
  * inside its own verifier_ops->get_func_proto() callback it should return
@@ -87,3 +89,25 @@ const struct bpf_func_proto bpf_map_delete_elem_proto = {
         .arg1_type = ARG_CONST_MAP_PTR,
         .arg2_type = ARG_PTR_TO_MAP_KEY,
 };
+
+static u64 bpf_get_prandom_u32(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5)
+{
+        return prandom_u32();
+}
+
+const struct bpf_func_proto bpf_get_prandom_u32_proto = {
+        .func           = bpf_get_prandom_u32,
+        .gpl_only       = false,
+        .ret_type       = RET_INTEGER,
+};
+
+static u64 bpf_get_smp_processor_id(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5)
+{
+        return raw_smp_processor_id();
+}
+
+const struct bpf_func_proto bpf_get_smp_processor_id_proto = {
+        .func           = bpf_get_smp_processor_id,
+        .gpl_only       = false,
+        .ret_type       = RET_INTEGER,
+};
diff --git a/net/core/filter.c b/net/core/filter.c
index 7a4eb7030dba..33310eee6134 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -1139,6 +1139,10 @@ sk_filter_func_proto(enum bpf_func_id func_id)
                 return &bpf_map_update_elem_proto;
         case BPF_FUNC_map_delete_elem:
                 return &bpf_map_delete_elem_proto;
+        case BPF_FUNC_get_prandom_u32:
+                return &bpf_get_prandom_u32_proto;
+        case BPF_FUNC_get_smp_processor_id:
+                return &bpf_get_smp_processor_id_proto;
         default:
                 return NULL;
         }