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0
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1
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2 /*
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3 * Copyright (C) Igor Sysoev
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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 #include <ngx_event.h>
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10 #include <ngx_event_pipe.h>
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11
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12
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13 static ngx_int_t ngx_event_pipe_read_upstream(ngx_event_pipe_t *p);
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14 static ngx_int_t ngx_event_pipe_write_to_downstream(ngx_event_pipe_t *p);
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15
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16 static ngx_int_t ngx_event_pipe_write_chain_to_temp_file(ngx_event_pipe_t *p);
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16
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17 static ngx_inline void ngx_event_pipe_remove_shadow_links(ngx_buf_t *buf);
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18 static ngx_inline void ngx_event_pipe_free_shadow_raw_buf(ngx_chain_t **free,
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0
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19 ngx_buf_t *buf);
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20 static ngx_int_t ngx_event_pipe_drain_chains(ngx_event_pipe_t *p);
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21
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22
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23 ngx_int_t ngx_event_pipe(ngx_event_pipe_t *p, int do_write)
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24 {
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25 u_int flags;
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26 ngx_event_t *rev, *wev;
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27
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28 for ( ;; ) {
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29 if (do_write) {
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32
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30 p->log->action = "sending to client";
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31
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0
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32 if (ngx_event_pipe_write_to_downstream(p) == NGX_ABORT) {
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33 return NGX_ABORT;
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34 }
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35 }
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36
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37 p->read = 0;
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38 p->upstream_blocked = 0;
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39
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32
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40 p->log->action = "reading upstream";
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41
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0
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42 if (ngx_event_pipe_read_upstream(p) == NGX_ABORT) {
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43 return NGX_ABORT;
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44 }
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45
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46 if (!p->read && !p->upstream_blocked) {
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47 break;
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48 }
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49
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50 do_write = 1;
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51 }
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52
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53 if (p->upstream->fd != -1) {
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54 rev = p->upstream->read;
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55
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56 flags = (rev->eof || rev->error) ? NGX_CLOSE_EVENT : 0;
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57
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58 if (ngx_handle_read_event(rev, flags) == NGX_ERROR) {
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59 return NGX_ABORT;
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60 }
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61
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62 if (rev->active) {
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63 ngx_add_timer(rev, p->read_timeout);
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64 }
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65 }
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66
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67 if (p->downstream->fd != -1) {
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68 wev = p->downstream->write;
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2
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69 if (ngx_handle_write_event(wev, p->send_lowat) == NGX_ERROR) {
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0
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70 return NGX_ABORT;
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71 }
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72
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73 if (wev->active) {
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74 ngx_add_timer(wev, p->send_timeout);
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75 }
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76 }
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77
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78 return NGX_OK;
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79 }
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80
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81
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32
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82 static ngx_int_t ngx_event_pipe_read_upstream(ngx_event_pipe_t *p)
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0
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83 {
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10
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84 ssize_t n, size;
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85 ngx_int_t rc;
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0
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86 ngx_buf_t *b;
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32
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87 ngx_chain_t *chain, *cl;
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0
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88
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89 if (p->upstream_eof || p->upstream_error || p->upstream_done) {
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90 return NGX_OK;
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91 }
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92
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93 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, p->log, 0,
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94 "pipe read upstream: %d", p->upstream->read->ready);
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95
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96 for ( ;; ) {
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97
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98 if (p->upstream_eof || p->upstream_error || p->upstream_done) {
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99 break;
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100 }
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101
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102 if (p->preread_bufs == NULL && !p->upstream->read->ready) {
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103 break;
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104 }
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105
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106 if (p->preread_bufs) {
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107
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108 /* use the pre-read bufs if they exist */
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109
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110 chain = p->preread_bufs;
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111 p->preread_bufs = NULL;
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112 n = p->preread_size;
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113
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114 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, p->log, 0,
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10
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115 "pipe preread: %z", n);
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0
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116
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117 if (n) {
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118 p->read = 1;
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119 }
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120
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121 } else {
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122
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123 /*
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124 * kqueue notifies about the end of file or a pending error.
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125 * This test allows not to allocate a buf on these conditions
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126 * and not to call ngx_recv_chain().
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127 */
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128
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129 if (p->upstream->read->available == 0
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130 && p->upstream->read->pending_eof)
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131 {
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132 p->upstream->read->ready = 0;
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133 p->upstream->read->eof = 0;
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134 p->upstream_eof = 1;
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135 p->read = 1;
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136
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18
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137 #if (NGX_HAVE_KQUEUE)
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0
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138 if (p->upstream->read->kq_errno) {
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139 p->upstream->read->error = 1;
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140 p->upstream_error = 1;
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141 p->upstream_eof = 0;
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142
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143 ngx_log_error(NGX_LOG_ERR, p->log,
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144 p->upstream->read->kq_errno,
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145 "readv() failed");
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146 }
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147 #endif
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148
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149 break;
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150 }
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151
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152 if (p->free_raw_bufs) {
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153
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154 /* use the free bufs if they exist */
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155
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156 chain = p->free_raw_bufs;
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157 if (p->single_buf) {
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158 p->free_raw_bufs = p->free_raw_bufs->next;
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159 chain->next = NULL;
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160 } else {
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161 p->free_raw_bufs = NULL;
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162 }
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163
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164 } else if (p->allocated < p->bufs.num) {
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165
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166 /* allocate a new buf if it's still allowed */
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167
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168 if (!(b = ngx_create_temp_buf(p->pool, p->bufs.size))) {
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169 return NGX_ABORT;
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170 }
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171
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172 p->allocated++;
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173
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32
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174 if (!(chain = ngx_alloc_chain_link(p->pool))) {
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175 return NGX_ABORT;
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176 }
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177
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178 chain->buf = b;
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179 chain->next = NULL;
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0
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180
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181 } else if (!p->cachable && p->downstream->write->ready) {
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182
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183 /*
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184 * if the bufs are not needed to be saved in a cache and
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185 * a downstream is ready then write the bufs to a downstream
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186 */
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187
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188 p->upstream_blocked = 1;
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189
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190 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, p->log, 0,
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191 "pipe downstream ready");
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192
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193 break;
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194
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195 } else if (p->cachable
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196 || p->temp_file->offset < p->max_temp_file_size)
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197 {
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198
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199 /*
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32
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200 * if it is allowed, then save some bufs from r->in
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0
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201 * to a temporary file, and add them to a r->out chain
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202 */
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203
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204 rc = ngx_event_pipe_write_chain_to_temp_file(p);
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205
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206 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, p->log, 0,
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10
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207 "pipe temp offset: %O", p->temp_file->offset);
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0
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208
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209 if (rc == NGX_AGAIN) {
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210 if (ngx_event_flags & NGX_USE_LEVEL_EVENT
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211 && p->upstream->read->active
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212 && p->upstream->read->ready)
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213 {
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214 if (ngx_del_event(p->upstream->read, NGX_READ_EVENT, 0)
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215 == NGX_ERROR)
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216 {
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217 return NGX_ABORT;
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218 }
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219 }
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220 }
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221
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222 if (rc != NGX_OK) {
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223 return rc;
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224 }
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225
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226 chain = p->free_raw_bufs;
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227 if (p->single_buf) {
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228 p->free_raw_bufs = p->free_raw_bufs->next;
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229 chain->next = NULL;
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230 } else {
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231 p->free_raw_bufs = NULL;
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232 }
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233
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234 } else {
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235
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32
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236 /* there are no bufs to read in */
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0
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237
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238 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, p->log, 0,
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239 "no pipe bufs to read in");
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240
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241 break;
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242 }
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243
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244 n = ngx_recv_chain(p->upstream, chain);
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245
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246 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, p->log, 0,
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10
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247 "pipe recv chain: %z", n);
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0
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248
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249 if (p->free_raw_bufs) {
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250 chain->next = p->free_raw_bufs;
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251 }
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252 p->free_raw_bufs = chain;
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253
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254 if (n == NGX_ERROR) {
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255 p->upstream_error = 1;
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256 return NGX_ERROR;
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257 }
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258
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259 if (n == NGX_AGAIN) {
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260 if (p->single_buf) {
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261 ngx_event_pipe_remove_shadow_links(chain->buf);
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262 }
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263
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264 break;
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265 }
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266
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267 p->read = 1;
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268
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269 if (n == 0) {
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270 p->upstream_eof = 1;
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271 break;
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272 }
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273 }
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274
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275 p->read_length += n;
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276 cl = chain;
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277
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278 while (cl && n > 0) {
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279
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280 ngx_event_pipe_remove_shadow_links(cl->buf);
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281
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282 size = cl->buf->end - cl->buf->last;
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283
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284 if (n >= size) {
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285 cl->buf->last = cl->buf->end;
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286
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287 /* STUB */ cl->buf->num = p->num++;
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288
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289 if (p->input_filter(p, cl->buf) == NGX_ERROR) {
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290 return NGX_ABORT;
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291 }
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292
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293 n -= size;
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294 cl = cl->next;
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295
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296 } else {
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297 cl->buf->last += n;
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298 n = 0;
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299 }
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300 }
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301
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302 p->free_raw_bufs = cl;
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303 }
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304
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305 #if (NGX_DEBUG)
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306
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2
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307 for (cl = p->busy; cl; cl = cl->next) {
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32
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308 ngx_log_debug8(NGX_LOG_DEBUG_EVENT, p->log, 0,
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309 "pipe buf busy s:%d t:%d f:%d "
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310 "%p, pos %p, size: %z "
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311 "file: %O, size: %z",
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312 (cl->buf->shadow ? 1 : 0),
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313 cl->buf->temporary, cl->buf->in_file,
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0
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314 cl->buf->start, cl->buf->pos,
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32
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315 cl->buf->last - cl->buf->pos,
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316 cl->buf->file_pos,
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317 cl->buf->file_last - cl->buf->file_pos);
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0
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318 }
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319
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2
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320 for (cl = p->out; cl; cl = cl->next) {
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32
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321 ngx_log_debug8(NGX_LOG_DEBUG_EVENT, p->log, 0,
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322 "pipe buf out s:%d t:%d f:%d "
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323 "%p, pos %p, size: %z "
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324 "file: %O, size: %z",
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325 (cl->buf->shadow ? 1 : 0),
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326 cl->buf->temporary, cl->buf->in_file,
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327 cl->buf->start, cl->buf->pos,
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328 cl->buf->last - cl->buf->pos,
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329 cl->buf->file_pos,
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330 cl->buf->file_last - cl->buf->file_pos);
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2
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331 }
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332
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333 for (cl = p->in; cl; cl = cl->next) {
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32
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334 ngx_log_debug8(NGX_LOG_DEBUG_EVENT, p->log, 0,
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335 "pipe buf in s:%d t:%d f:%d "
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336 "%p, pos %p, size: %z "
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337 "file: %O, size: %z",
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338 (cl->buf->shadow ? 1 : 0),
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339 cl->buf->temporary, cl->buf->in_file,
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0
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340 cl->buf->start, cl->buf->pos,
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32
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341 cl->buf->last - cl->buf->pos,
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342 cl->buf->file_pos,
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343 cl->buf->file_last - cl->buf->file_pos);
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0
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344 }
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345
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346 for (cl = p->free_raw_bufs; cl; cl = cl->next) {
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32
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347 ngx_log_debug8(NGX_LOG_DEBUG_EVENT, p->log, 0,
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348 "pipe buf free s:%d t:%d f:%d "
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349 "%p, pos %p, size: %z "
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350 "file: %O, size: %z",
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351 (cl->buf->shadow ? 1 : 0),
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352 cl->buf->temporary, cl->buf->in_file,
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353 cl->buf->start, cl->buf->pos,
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354 cl->buf->last - cl->buf->pos,
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355 cl->buf->file_pos,
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356 cl->buf->file_last - cl->buf->file_pos);
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0
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357 }
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358
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359 #endif
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360
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361 if ((p->upstream_eof || p->upstream_error) && p->free_raw_bufs) {
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362
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363 /* STUB */ p->free_raw_bufs->buf->num = p->num++;
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364
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365 if (p->input_filter(p, p->free_raw_bufs->buf) == NGX_ERROR) {
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366 return NGX_ABORT;
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367 }
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368
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369 p->free_raw_bufs = p->free_raw_bufs->next;
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370
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371 if (p->free_bufs) {
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372 for (cl = p->free_raw_bufs; cl; cl = cl->next) {
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2
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373 if (cl->buf->shadow == NULL) {
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374 ngx_pfree(p->pool, cl->buf->start);
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375 }
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0
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376 }
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377 }
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378 }
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379
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380 if (p->cachable && p->in) {
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381 if (ngx_event_pipe_write_chain_to_temp_file(p) == NGX_ABORT) {
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382 return NGX_ABORT;
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383 }
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384 }
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385
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386 return NGX_OK;
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387 }
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388
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389
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32
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390 static ngx_int_t ngx_event_pipe_write_to_downstream(ngx_event_pipe_t *p)
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0
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391 {
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28
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392 size_t bsize;
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0
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393 ngx_uint_t flush;
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32
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394 ngx_chain_t *out, **ll, *cl;
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0
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395
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396 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, p->log, 0,
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397 "pipe write downstream: %d", p->downstream->write->ready);
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398
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399 for ( ;; ) {
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400 if (p->downstream_error) {
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401 return ngx_event_pipe_drain_chains(p);
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402 }
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403
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|
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404 if (p->upstream_eof || p->upstream_error || p->upstream_done) {
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405
|
|
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406 /* pass the p->out and p->in chains to the output filter */
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407
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|
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408 if (p->out) {
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|
|
409 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, p->log, 0,
|
|
|
410 "pipe write downstream flush out");
|
|
|
411
|
|
|
412 if (p->output_filter(p->output_ctx, p->out) == NGX_ERROR) {
|
|
|
413 p->downstream_error = 1;
|
|
|
414 return ngx_event_pipe_drain_chains(p);
|
|
|
415 }
|
|
|
416
|
|
|
417 p->out = NULL;
|
|
|
418 }
|
|
|
419
|
|
|
420 if (p->in) {
|
|
|
421 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, p->log, 0,
|
|
|
422 "pipe write downstream flush in");
|
|
|
423
|
|
|
424 if (p->output_filter(p->output_ctx, p->in) == NGX_ERROR) {
|
|
|
425 p->downstream_error = 1;
|
|
|
426 return ngx_event_pipe_drain_chains(p);
|
|
|
427 }
|
|
|
428
|
|
|
429 p->in = NULL;
|
|
|
430 }
|
|
|
431
|
|
|
432 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, p->log, 0,
|
|
|
433 "pipe write downstream done");
|
|
|
434
|
|
|
435 /* TODO: free unused bufs */
|
|
|
436
|
|
|
437 p->downstream_done = 1;
|
|
|
438 break;
|
|
|
439 }
|
|
|
440
|
|
|
441 if (!p->downstream->write->ready) {
|
|
|
442 break;
|
|
|
443 }
|
|
|
444
|
|
28
|
445 /* bsize is the size of the busy recycled bufs */
|
|
0
|
446
|
|
|
447 bsize = 0;
|
|
|
448
|
|
|
449 for (cl = p->busy; cl; cl = cl->next) {
|
|
28
|
450 if (cl->buf->recycled) {
|
|
|
451 bsize += cl->buf->end - cl->buf->start;
|
|
|
452 }
|
|
0
|
453 }
|
|
|
454
|
|
|
455 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, p->log, 0,
|
|
28
|
456 "pipe write busy: %uz", bsize);
|
|
0
|
457
|
|
|
458 out = NULL;
|
|
|
459 ll = NULL;
|
|
|
460 flush = 0;
|
|
|
461
|
|
|
462 for ( ;; ) {
|
|
|
463 if (p->out) {
|
|
|
464 cl = p->out;
|
|
|
465
|
|
28
|
466 if (cl->buf->recycled
|
|
|
467 && bsize + cl->buf->last - cl->buf->pos > p->busy_size)
|
|
|
468 {
|
|
0
|
469 flush = 1;
|
|
|
470 break;
|
|
|
471 }
|
|
|
472
|
|
|
473 p->out = p->out->next;
|
|
28
|
474
|
|
|
475 ngx_event_pipe_free_shadow_raw_buf(&p->free_raw_bufs, cl->buf);
|
|
0
|
476
|
|
|
477 } else if (!p->cachable && p->in) {
|
|
|
478 cl = p->in;
|
|
|
479
|
|
28
|
480 if (cl->buf->recycled
|
|
|
481 && bsize + cl->buf->last - cl->buf->pos > p->busy_size)
|
|
|
482 {
|
|
0
|
483 flush = 1;
|
|
|
484 break;
|
|
|
485 }
|
|
|
486
|
|
|
487 p->in = p->in->next;
|
|
|
488
|
|
|
489 } else {
|
|
|
490 break;
|
|
|
491 }
|
|
|
492
|
|
28
|
493 if (cl->buf->recycled) {
|
|
|
494 bsize += cl->buf->last - cl->buf->pos;
|
|
|
495 }
|
|
|
496
|
|
0
|
497 cl->next = NULL;
|
|
|
498 ngx_chain_add_link(out, ll, cl);
|
|
|
499 }
|
|
|
500
|
|
|
501 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, p->log, 0,
|
|
10
|
502 "pipe write: out:%p, f:%d", out, flush);
|
|
0
|
503
|
|
|
504 if (out == NULL && !flush) {
|
|
|
505 break;
|
|
|
506 }
|
|
|
507
|
|
|
508 if (p->output_filter(p->output_ctx, out) == NGX_ERROR) {
|
|
|
509 p->downstream_error = 1;
|
|
|
510 return ngx_event_pipe_drain_chains(p);
|
|
|
511 }
|
|
|
512
|
|
|
513 ngx_chain_update_chains(&p->free, &p->busy, &out, p->tag);
|
|
|
514
|
|
|
515 for (cl = p->free; cl; cl = cl->next) {
|
|
|
516
|
|
|
517 if (cl->buf->temp_file) {
|
|
|
518 if (p->cachable || !p->cyclic_temp_file) {
|
|
|
519 continue;
|
|
|
520 }
|
|
|
521
|
|
|
522 /* reset p->temp_offset if all bufs had been sent */
|
|
|
523
|
|
|
524 if (cl->buf->file_last == p->temp_file->offset) {
|
|
|
525 p->temp_file->offset = 0;
|
|
|
526 }
|
|
|
527 }
|
|
|
528
|
|
|
529 /* TODO: free buf if p->free_bufs && upstream done */
|
|
|
530
|
|
|
531 /* add the free shadow raw buf to p->free_raw_bufs */
|
|
|
532
|
|
|
533 if (cl->buf->last_shadow) {
|
|
32
|
534 if (ngx_event_pipe_add_free_buf(p, cl->buf->shadow) != NGX_OK) {
|
|
|
535 return NGX_ABORT;
|
|
|
536 }
|
|
0
|
537
|
|
|
538 cl->buf->last_shadow = 0;
|
|
|
539 }
|
|
|
540
|
|
|
541 cl->buf->shadow = NULL;
|
|
|
542 }
|
|
|
543 }
|
|
|
544
|
|
|
545 return NGX_OK;
|
|
|
546 }
|
|
|
547
|
|
|
548
|
|
|
549 static ngx_int_t ngx_event_pipe_write_chain_to_temp_file(ngx_event_pipe_t *p)
|
|
|
550 {
|
|
|
551 ssize_t size, bsize;
|
|
|
552 ngx_buf_t *b;
|
|
|
553 ngx_chain_t *cl, *tl, *next, *out, **ll, **last_free, fl;
|
|
|
554
|
|
|
555 if (p->buf_to_file) {
|
|
|
556 fl.buf = p->buf_to_file;
|
|
|
557 fl.next = p->in;
|
|
|
558 out = &fl;
|
|
|
559
|
|
|
560 } else {
|
|
|
561 out = p->in;
|
|
|
562 }
|
|
|
563
|
|
|
564 if (!p->cachable) {
|
|
|
565
|
|
|
566 size = 0;
|
|
|
567 cl = out;
|
|
|
568 ll = NULL;
|
|
|
569
|
|
|
570 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, p->log, 0,
|
|
10
|
571 "pipe offset: %O", p->temp_file->offset);
|
|
0
|
572
|
|
|
573 do {
|
|
|
574 bsize = cl->buf->last - cl->buf->pos;
|
|
|
575
|
|
|
576 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, p->log, 0,
|
|
10
|
577 "pipe buf %p, pos %p, size: %z",
|
|
0
|
578 cl->buf->start, cl->buf->pos, bsize);
|
|
|
579
|
|
|
580 if ((size + bsize > p->temp_file_write_size)
|
|
|
581 || (p->temp_file->offset + size + bsize > p->max_temp_file_size))
|
|
|
582 {
|
|
|
583 break;
|
|
|
584 }
|
|
|
585
|
|
|
586 size += bsize;
|
|
|
587 ll = &cl->next;
|
|
|
588 cl = cl->next;
|
|
|
589
|
|
|
590 } while (cl);
|
|
|
591
|
|
10
|
592 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, p->log, 0, "size: %z", size);
|
|
0
|
593
|
|
|
594 if (cl) {
|
|
|
595 p->in = cl;
|
|
|
596 *ll = NULL;
|
|
|
597
|
|
|
598 } else {
|
|
|
599 p->in = NULL;
|
|
|
600 p->last_in = &p->in;
|
|
|
601 }
|
|
|
602
|
|
|
603 } else {
|
|
|
604 p->in = NULL;
|
|
|
605 p->last_in = &p->in;
|
|
|
606 }
|
|
|
607
|
|
|
608 if (ngx_write_chain_to_temp_file(p->temp_file, out) == NGX_ERROR) {
|
|
|
609 return NGX_ABORT;
|
|
|
610 }
|
|
|
611
|
|
|
612 for (last_free = &p->free_raw_bufs;
|
|
|
613 *last_free != NULL;
|
|
|
614 last_free = &(*last_free)->next)
|
|
|
615 {
|
|
|
616 /* void */
|
|
|
617 }
|
|
|
618
|
|
|
619 if (p->buf_to_file) {
|
|
|
620 p->temp_file->offset = p->buf_to_file->last - p->buf_to_file->pos;
|
|
|
621 p->buf_to_file = NULL;
|
|
|
622 out = out->next;
|
|
|
623 }
|
|
|
624
|
|
|
625 for (cl = out; cl; cl = next) {
|
|
|
626 next = cl->next;
|
|
|
627 cl->next = NULL;
|
|
|
628
|
|
|
629 b = cl->buf;
|
|
|
630 b->file = &p->temp_file->file;
|
|
|
631 b->file_pos = p->temp_file->offset;
|
|
|
632 p->temp_file->offset += b->last - b->pos;
|
|
|
633 b->file_last = p->temp_file->offset;
|
|
|
634
|
|
|
635 b->in_file = 1;
|
|
|
636 b->temp_file = 1;
|
|
|
637
|
|
|
638 ngx_chain_add_link(p->out, p->last_out, cl);
|
|
|
639
|
|
|
640 if (b->last_shadow) {
|
|
32
|
641
|
|
|
642 if (!(tl = ngx_alloc_chain_link(p->pool))) {
|
|
|
643 return NGX_ABORT;
|
|
|
644 }
|
|
|
645
|
|
|
646 tl->buf = b->shadow;
|
|
|
647 tl->next = NULL;
|
|
|
648
|
|
|
649 *last_free = tl;
|
|
|
650 last_free = &tl->next;
|
|
|
651
|
|
2
|
652 b->shadow->pos = b->shadow->start;
|
|
|
653 b->shadow->last = b->shadow->start;
|
|
|
654
|
|
32
|
655 ngx_event_pipe_remove_shadow_links(b->shadow);
|
|
0
|
656 }
|
|
|
657 }
|
|
|
658
|
|
|
659 return NGX_OK;
|
|
|
660 }
|
|
|
661
|
|
|
662
|
|
|
663 /* the copy input filter */
|
|
|
664
|
|
|
665 ngx_int_t ngx_event_pipe_copy_input_filter(ngx_event_pipe_t *p, ngx_buf_t *buf)
|
|
|
666 {
|
|
|
667 ngx_buf_t *b;
|
|
|
668 ngx_chain_t *cl;
|
|
|
669
|
|
|
670 if (buf->pos == buf->last) {
|
|
|
671 return NGX_OK;
|
|
|
672 }
|
|
|
673
|
|
|
674 if (p->free) {
|
|
|
675 b = p->free->buf;
|
|
|
676 p->free = p->free->next;
|
|
|
677
|
|
|
678 } else {
|
|
|
679 if (!(b = ngx_alloc_buf(p->pool))) {
|
|
|
680 return NGX_ERROR;
|
|
|
681 }
|
|
|
682 }
|
|
|
683
|
|
|
684 ngx_memcpy(b, buf, sizeof(ngx_buf_t));
|
|
|
685 b->shadow = buf;
|
|
|
686 b->tag = p->tag;
|
|
|
687 b->last_shadow = 1;
|
|
|
688 b->recycled = 1;
|
|
|
689 buf->shadow = b;
|
|
|
690
|
|
32
|
691 if (!(cl = ngx_alloc_chain_link(p->pool))) {
|
|
|
692 return NGX_ERROR;
|
|
|
693 }
|
|
|
694
|
|
|
695 cl->buf = b;
|
|
|
696 cl->next = NULL;
|
|
0
|
697
|
|
28
|
698 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, p->log, 0, "input buf #%d", b->num);
|
|
0
|
699
|
|
|
700 ngx_chain_add_link(p->in, p->last_in, cl);
|
|
|
701
|
|
|
702 return NGX_OK;
|
|
|
703 }
|
|
|
704
|
|
|
705
|
|
16
|
706 static ngx_inline void ngx_event_pipe_remove_shadow_links(ngx_buf_t *buf)
|
|
0
|
707 {
|
|
|
708 ngx_buf_t *b, *next;
|
|
|
709
|
|
2
|
710 b = buf->shadow;
|
|
|
711
|
|
|
712 if (b == NULL) {
|
|
0
|
713 return;
|
|
|
714 }
|
|
|
715
|
|
|
716 while (!b->last_shadow) {
|
|
|
717 next = b->shadow;
|
|
|
718
|
|
2
|
719 b->temporary = 0;
|
|
|
720 b->recycled = 0;
|
|
0
|
721
|
|
|
722 b->shadow = NULL;
|
|
|
723 b = next;
|
|
|
724 }
|
|
|
725
|
|
2
|
726 b->temporary = 0;
|
|
|
727 b->recycled = 0;
|
|
0
|
728 b->last_shadow = 0;
|
|
|
729
|
|
|
730 b->shadow = NULL;
|
|
|
731
|
|
|
732 buf->shadow = NULL;
|
|
|
733 }
|
|
|
734
|
|
|
735
|
|
16
|
736 static ngx_inline void ngx_event_pipe_free_shadow_raw_buf(ngx_chain_t **free,
|
|
0
|
737 ngx_buf_t *buf)
|
|
|
738 {
|
|
|
739 ngx_buf_t *s;
|
|
|
740 ngx_chain_t *cl, **ll;
|
|
|
741
|
|
|
742 if (buf->shadow == NULL) {
|
|
|
743 return;
|
|
|
744 }
|
|
|
745
|
|
|
746 for (s = buf->shadow; !s->last_shadow; s = s->shadow) { /* void */ }
|
|
|
747
|
|
|
748 ll = free;
|
|
|
749
|
|
|
750 for (cl = *free ; cl; cl = cl->next) {
|
|
|
751 if (cl->buf == s) {
|
|
|
752 *ll = cl->next;
|
|
|
753 break;
|
|
|
754 }
|
|
|
755
|
|
|
756 if (cl->buf->shadow) {
|
|
|
757 break;
|
|
|
758 }
|
|
|
759
|
|
|
760 ll = &cl->next;
|
|
|
761 }
|
|
|
762 }
|
|
|
763
|
|
|
764
|
|
32
|
765 ngx_int_t ngx_event_pipe_add_free_buf(ngx_event_pipe_t *p, ngx_buf_t *b)
|
|
0
|
766 {
|
|
32
|
767 ngx_chain_t *cl;
|
|
|
768
|
|
|
769 if (!(cl = ngx_alloc_chain_link(p->pool))) {
|
|
|
770 return NGX_ERROR;
|
|
0
|
771 }
|
|
|
772
|
|
32
|
773 b->pos = b->start;
|
|
|
774 b->last = b->start;
|
|
|
775 b->shadow = NULL;
|
|
|
776
|
|
|
777 cl->buf = b;
|
|
|
778
|
|
|
779 if (p->free_raw_bufs == NULL) {
|
|
|
780 p->free_raw_bufs = cl;
|
|
|
781 cl->next = NULL;
|
|
|
782
|
|
|
783 return NGX_OK;
|
|
|
784 }
|
|
|
785
|
|
|
786 if (p->free_raw_bufs->buf->pos == p->free_raw_bufs->buf->last) {
|
|
0
|
787
|
|
32
|
788 /* add the free buf to the list start */
|
|
|
789
|
|
|
790 cl->next = p->free_raw_bufs;
|
|
|
791 p->free_raw_bufs = cl;
|
|
|
792
|
|
|
793 return NGX_OK;
|
|
0
|
794 }
|
|
32
|
795
|
|
|
796 /* the first free buf is partialy filled, thus add the free buf after it */
|
|
|
797
|
|
|
798 cl->next = p->free_raw_bufs->next;
|
|
|
799 p->free_raw_bufs->next = cl;
|
|
|
800
|
|
|
801 return NGX_OK;
|
|
0
|
802 }
|
|
|
803
|
|
|
804
|
|
|
805 static ngx_int_t ngx_event_pipe_drain_chains(ngx_event_pipe_t *p)
|
|
|
806 {
|
|
|
807 ngx_chain_t *cl, *tl;
|
|
|
808
|
|
|
809 for ( ;; ) {
|
|
|
810 if (p->busy) {
|
|
|
811 cl = p->busy;
|
|
|
812 p->busy = NULL;
|
|
|
813
|
|
|
814 } else if (p->out) {
|
|
|
815 cl = p->out;
|
|
|
816 p->out = NULL;
|
|
|
817
|
|
|
818 } else if (p->in) {
|
|
|
819 cl = p->in;
|
|
|
820 p->in = NULL;
|
|
|
821
|
|
|
822 } else {
|
|
|
823 return NGX_OK;
|
|
|
824 }
|
|
|
825
|
|
|
826 while (cl) {
|
|
|
827 if (cl->buf->last_shadow) {
|
|
32
|
828 if (ngx_event_pipe_add_free_buf(p, cl->buf->shadow) != NGX_OK) {
|
|
28
|
829 return NGX_ABORT;
|
|
|
830 }
|
|
|
831
|
|
0
|
832 cl->buf->last_shadow = 0;
|
|
|
833 }
|
|
|
834
|
|
|
835 cl->buf->shadow = NULL;
|
|
|
836 tl = cl->next;
|
|
|
837 cl->next = p->free;
|
|
|
838 p->free = cl;
|
|
|
839 cl = tl;
|
|
|
840 }
|
|
|
841 }
|
|
|
842 }
|
