QUIC: ngx_quic_bpf module.

The quic kernel bpf helper inspects packet payload for DCID, extracts key
and routes the packet into socket matching the key.

Due to reuseport feature, each worker owns a personal socket, which is
identified by the same key, used to create DCID.

BPF objects are locked in RAM and are subject to RLIMIT_MEMLOCK.
The "ulimit -l" command may be used to setup proper limits, if maps
cannot be created with EPERM or updated with ETOOLONG.

1 files changed, 90 insertions, 0 deletions

diff --git a/src/event/quic/ngx_event_quic_bpf_code.c b/src/event/quic/ngx_event_quic_bpf_code.c
new file mode 100644
index 000000000..9cbeb3432
--- /dev/null
+++ b/src/event/quic/ngx_event_quic_bpf_code.c
@@ -0,0 +1,90 @@
+/* AUTO-GENERATED, DO NOT EDIT. */
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include "ngx_bpf.h"
+
+
+static ngx_bpf_reloc_t bpf_reloc_prog_ngx_quic_reuseport_helper[] = {
+    { "ngx_quic_sockmap", 56 },
+};
+
+static struct bpf_insn bpf_insn_prog_ngx_quic_reuseport_helper[] = {
+    /* opcode dst          src         offset imm */
+    { 0x79,   BPF_REG_4,   BPF_REG_1, (int16_t)      0,        0x0 },
+    { 0x79,   BPF_REG_3,   BPF_REG_1, (int16_t)      8,        0x0 },
+    { 0xbf,   BPF_REG_2,   BPF_REG_4, (int16_t)      0,        0x0 },
+    {  0x7,   BPF_REG_2,   BPF_REG_0, (int16_t)      0,        0x8 },
+    { 0x2d,   BPF_REG_2,   BPF_REG_3, (int16_t)     55,        0x0 },
+    { 0xbf,   BPF_REG_5,   BPF_REG_4, (int16_t)      0,        0x0 },
+    {  0x7,   BPF_REG_5,   BPF_REG_0, (int16_t)      0,        0x9 },
+    { 0x2d,   BPF_REG_5,   BPF_REG_3, (int16_t)     52,        0x0 },
+    { 0xb7,   BPF_REG_5,   BPF_REG_0, (int16_t)      0,       0x14 },
+    { 0xb7,   BPF_REG_0,   BPF_REG_0, (int16_t)      0,        0x9 },
+    { 0x71,   BPF_REG_6,   BPF_REG_2, (int16_t)      0,        0x0 },
+    { 0x67,   BPF_REG_6,   BPF_REG_0, (int16_t)      0,       0x38 },
+    { 0xc7,   BPF_REG_6,   BPF_REG_0, (int16_t)      0,       0x38 },
+    { 0x65,   BPF_REG_6,   BPF_REG_0, (int16_t)     10, 0xffffffff },
+    { 0xbf,   BPF_REG_2,   BPF_REG_4, (int16_t)      0,        0x0 },
+    {  0x7,   BPF_REG_2,   BPF_REG_0, (int16_t)      0,        0xd },
+    { 0x2d,   BPF_REG_2,   BPF_REG_3, (int16_t)     43,        0x0 },
+    { 0xbf,   BPF_REG_5,   BPF_REG_4, (int16_t)      0,        0x0 },
+    {  0x7,   BPF_REG_5,   BPF_REG_0, (int16_t)      0,        0xe },
+    { 0x2d,   BPF_REG_5,   BPF_REG_3, (int16_t)     40,        0x0 },
+    { 0xb7,   BPF_REG_0,   BPF_REG_0, (int16_t)      0,        0xe },
+    { 0x71,   BPF_REG_5,   BPF_REG_4, (int16_t)     12,        0x0 },
+    { 0xb7,   BPF_REG_6,   BPF_REG_0, (int16_t)      0,        0x8 },
+    { 0x2d,   BPF_REG_6,   BPF_REG_5, (int16_t)     36,        0x0 },
+    {  0xf,   BPF_REG_5,   BPF_REG_0, (int16_t)      0,        0x0 },
+    {  0xf,   BPF_REG_4,   BPF_REG_5, (int16_t)      0,        0x0 },
+    { 0x2d,   BPF_REG_4,   BPF_REG_3, (int16_t)     33,        0x0 },
+    { 0xbf,   BPF_REG_4,   BPF_REG_2, (int16_t)      0,        0x0 },
+    {  0x7,   BPF_REG_4,   BPF_REG_0, (int16_t)      0,        0x9 },
+    { 0x2d,   BPF_REG_4,   BPF_REG_3, (int16_t)     30,        0x0 },
+    { 0x71,   BPF_REG_4,   BPF_REG_2, (int16_t)      1,        0x0 },
+    { 0x67,   BPF_REG_4,   BPF_REG_0, (int16_t)      0,       0x38 },
+    { 0x71,   BPF_REG_3,   BPF_REG_2, (int16_t)      2,        0x0 },
+    { 0x67,   BPF_REG_3,   BPF_REG_0, (int16_t)      0,       0x30 },
+    { 0x4f,   BPF_REG_3,   BPF_REG_4, (int16_t)      0,        0x0 },
+    { 0x71,   BPF_REG_4,   BPF_REG_2, (int16_t)      3,        0x0 },
+    { 0x67,   BPF_REG_4,   BPF_REG_0, (int16_t)      0,       0x28 },
+    { 0x4f,   BPF_REG_3,   BPF_REG_4, (int16_t)      0,        0x0 },
+    { 0x71,   BPF_REG_4,   BPF_REG_2, (int16_t)      4,        0x0 },
+    { 0x67,   BPF_REG_4,   BPF_REG_0, (int16_t)      0,       0x20 },
+    { 0x4f,   BPF_REG_3,   BPF_REG_4, (int16_t)      0,        0x0 },
+    { 0x71,   BPF_REG_4,   BPF_REG_2, (int16_t)      5,        0x0 },
+    { 0x67,   BPF_REG_4,   BPF_REG_0, (int16_t)      0,       0x38 },
+    { 0xc7,   BPF_REG_4,   BPF_REG_0, (int16_t)      0,       0x20 },
+    { 0x4f,   BPF_REG_3,   BPF_REG_4, (int16_t)      0,        0x0 },
+    { 0x71,   BPF_REG_4,   BPF_REG_2, (int16_t)      6,        0x0 },
+    { 0x67,   BPF_REG_4,   BPF_REG_0, (int16_t)      0,       0x10 },
+    { 0x4f,   BPF_REG_3,   BPF_REG_4, (int16_t)      0,        0x0 },
+    { 0x71,   BPF_REG_4,   BPF_REG_2, (int16_t)      7,        0x0 },
+    { 0x67,   BPF_REG_4,   BPF_REG_0, (int16_t)      0,        0x8 },
+    { 0x4f,   BPF_REG_3,   BPF_REG_4, (int16_t)      0,        0x0 },
+    { 0x71,   BPF_REG_2,   BPF_REG_2, (int16_t)      8,        0x0 },
+    { 0x4f,   BPF_REG_3,   BPF_REG_2, (int16_t)      0,        0x0 },
+    { 0x7b,  BPF_REG_10,   BPF_REG_3, (int16_t)  65528,        0x0 },
+    { 0xbf,   BPF_REG_3,  BPF_REG_10, (int16_t)      0,        0x0 },
+    {  0x7,   BPF_REG_3,   BPF_REG_0, (int16_t)      0, 0xfffffff8 },
+    { 0x18,   BPF_REG_2,   BPF_REG_0, (int16_t)      0,        0x0 },
+    {  0x0,   BPF_REG_0,   BPF_REG_0, (int16_t)      0,        0x0 },
+    { 0xb7,   BPF_REG_4,   BPF_REG_0, (int16_t)      0,        0x0 },
+    { 0x85,   BPF_REG_0,   BPF_REG_0, (int16_t)      0,       0x52 },
+    { 0xb7,   BPF_REG_0,   BPF_REG_0, (int16_t)      0,        0x1 },
+    { 0x95,   BPF_REG_0,   BPF_REG_0, (int16_t)      0,        0x0 },
+};
+
+
+ngx_bpf_program_t ngx_quic_reuseport_helper = {
+    .relocs = bpf_reloc_prog_ngx_quic_reuseport_helper,
+    .nrelocs = sizeof(bpf_reloc_prog_ngx_quic_reuseport_helper)
+               / sizeof(bpf_reloc_prog_ngx_quic_reuseport_helper[0]),
+    .ins = bpf_insn_prog_ngx_quic_reuseport_helper,
+    .nins = sizeof(bpf_insn_prog_ngx_quic_reuseport_helper)
+            / sizeof(bpf_insn_prog_ngx_quic_reuseport_helper[0]),
+    .license = "BSD",
+    .type = BPF_PROG_TYPE_SK_REUSEPORT,
+};
+