Mercurial > hg > nginx
annotate src/core/ngx_bpf.c @ 9103:b9230e37b8a1 quic
QUIC: removed "quic_mtu" directive.
The directive used to set the value of the "max_udp_payload_size" transport
parameter. According to RFC 9000, Section 18.2, the value specifies the size
of buffer for reading incoming datagrams:
This limit does act as an additional constraint on datagram size in
the same way as the path MTU, but it is a property of the endpoint
and not the path; see Section 14. It is expected that this is the
space an endpoint dedicates to holding incoming packets.
Current QUIC implementation uses the maximum possible buffer size (65527) for
reading datagrams.
author | Roman Arutyunyan <arut@nginx.com> |
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date | Thu, 11 May 2023 10:37:51 +0400 |
parents | 7a07724256c2 |
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1 |
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2 /* |
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3 * Copyright (C) Nginx, Inc. |
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4 */ |
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5 |
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6 |
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7 #include <ngx_config.h> |
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8 #include <ngx_core.h> |
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9 |
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10 #define NGX_BPF_LOGBUF_SIZE (16 * 1024) |
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11 |
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12 |
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13 static ngx_inline int |
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14 ngx_bpf(enum bpf_cmd cmd, union bpf_attr *attr, unsigned int size) |
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15 { |
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16 return syscall(__NR_bpf, cmd, attr, size); |
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17 } |
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18 |
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19 |
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20 void |
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21 ngx_bpf_program_link(ngx_bpf_program_t *program, const char *symbol, int fd) |
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22 { |
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23 ngx_uint_t i; |
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24 ngx_bpf_reloc_t *rl; |
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25 |
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26 rl = program->relocs; |
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27 |
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28 for (i = 0; i < program->nrelocs; i++) { |
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29 if (ngx_strcmp(rl[i].name, symbol) == 0) { |
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30 program->ins[rl[i].offset].src_reg = 1; |
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31 program->ins[rl[i].offset].imm = fd; |
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32 } |
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33 } |
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34 } |
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35 |
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36 |
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37 int |
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38 ngx_bpf_load_program(ngx_log_t *log, ngx_bpf_program_t *program) |
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39 { |
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40 int fd; |
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41 union bpf_attr attr; |
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42 #if (NGX_DEBUG) |
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43 char buf[NGX_BPF_LOGBUF_SIZE]; |
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44 #endif |
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45 |
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46 ngx_memzero(&attr, sizeof(union bpf_attr)); |
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47 |
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48 attr.license = (uintptr_t) program->license; |
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49 attr.prog_type = program->type; |
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50 attr.insns = (uintptr_t) program->ins; |
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51 attr.insn_cnt = program->nins; |
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52 |
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53 #if (NGX_DEBUG) |
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54 /* for verifier errors */ |
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55 attr.log_buf = (uintptr_t) buf; |
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56 attr.log_size = NGX_BPF_LOGBUF_SIZE; |
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57 attr.log_level = 1; |
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58 #endif |
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59 |
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60 fd = ngx_bpf(BPF_PROG_LOAD, &attr, sizeof(attr)); |
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61 if (fd < 0) { |
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62 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, |
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63 "failed to load BPF program"); |
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64 |
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65 ngx_log_debug1(NGX_LOG_DEBUG_CORE, log, 0, |
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66 "bpf verifier: %s", buf); |
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67 |
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68 return -1; |
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69 } |
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70 |
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71 return fd; |
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72 } |
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73 |
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74 |
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75 int |
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76 ngx_bpf_map_create(ngx_log_t *log, enum bpf_map_type type, int key_size, |
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77 int value_size, int max_entries, uint32_t map_flags) |
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78 { |
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79 int fd; |
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80 union bpf_attr attr; |
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81 |
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82 ngx_memzero(&attr, sizeof(union bpf_attr)); |
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83 |
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84 attr.map_type = type; |
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85 attr.key_size = key_size; |
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86 attr.value_size = value_size; |
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87 attr.max_entries = max_entries; |
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88 attr.map_flags = map_flags; |
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89 |
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90 fd = ngx_bpf(BPF_MAP_CREATE, &attr, sizeof(attr)); |
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91 if (fd < 0) { |
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92 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, |
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93 "failed to create BPF map"); |
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94 return NGX_ERROR; |
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95 } |
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96 |
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97 return fd; |
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98 } |
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99 |
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100 |
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101 int |
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102 ngx_bpf_map_update(int fd, const void *key, const void *value, uint64_t flags) |
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103 { |
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104 union bpf_attr attr; |
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105 |
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106 ngx_memzero(&attr, sizeof(union bpf_attr)); |
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107 |
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108 attr.map_fd = fd; |
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109 attr.key = (uintptr_t) key; |
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110 attr.value = (uintptr_t) value; |
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111 attr.flags = flags; |
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112 |
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113 return ngx_bpf(BPF_MAP_UPDATE_ELEM, &attr, sizeof(attr)); |
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114 } |
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115 |
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116 |
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117 int |
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118 ngx_bpf_map_delete(int fd, const void *key) |
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119 { |
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120 union bpf_attr attr; |
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121 |
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122 ngx_memzero(&attr, sizeof(union bpf_attr)); |
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123 |
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124 attr.map_fd = fd; |
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125 attr.key = (uintptr_t) key; |
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126 |
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127 return ngx_bpf(BPF_MAP_DELETE_ELEM, &attr, sizeof(attr)); |
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128 } |
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129 |
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130 |
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131 int |
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132 ngx_bpf_map_lookup(int fd, const void *key, void *value) |
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133 { |
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134 union bpf_attr attr; |
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135 |
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136 ngx_memzero(&attr, sizeof(union bpf_attr)); |
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137 |
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138 attr.map_fd = fd; |
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139 attr.key = (uintptr_t) key; |
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140 attr.value = (uintptr_t) value; |
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141 |
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142 return ngx_bpf(BPF_MAP_LOOKUP_ELEM, &attr, sizeof(attr)); |
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143 } |