Mercurial > hg > nginx
annotate src/core/ngx_bpf.c @ 9139:d7dec2970161
QUIC: always add ACK frame to the queue head.
Previously it was added to the tail as all other frames. However, if the
amount of queued data is large, it could delay the delivery of ACK, which
could trigger frames retransmissions and slow down the connection.
author | Roman Arutyunyan <arut@nginx.com> |
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date | Thu, 10 Aug 2023 20:11:29 +0400 |
parents | 7a07724256c2 |
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rev | line source |
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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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Core: fixed build with BPF on non-64bit platforms (ticket #2152).
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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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Core: added interface to linux bpf() system call.
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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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Core: added interface to linux bpf() system call.
Vladimir Homutov <vl@nginx.com>
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138 attr.map_fd = fd; |
8722
7a07724256c2
Core: fixed build with BPF on non-64bit platforms (ticket #2152).
Vladimir Homutov <vl@nginx.com>
parents:
8675
diff
changeset
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139 attr.key = (uintptr_t) key; |
7a07724256c2
Core: fixed build with BPF on non-64bit platforms (ticket #2152).
Vladimir Homutov <vl@nginx.com>
parents:
8675
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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 } |