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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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17 ngx_inline static void ngx_event_pipe_remove_shadow_links(ngx_buf_t *buf);
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18 ngx_inline static void ngx_event_pipe_free_shadow_raw_buf(ngx_chain_t **free,
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19 ngx_buf_t *buf);
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20 ngx_inline static void ngx_event_pipe_add_free_buf(ngx_chain_t **chain,
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21 ngx_chain_t *cl);
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22 static ngx_int_t ngx_event_pipe_drain_chains(ngx_event_pipe_t *p);
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23
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24
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25 ngx_int_t ngx_event_pipe(ngx_event_pipe_t *p, int do_write)
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26 {
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27 u_int flags;
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28 ngx_event_t *rev, *wev;
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29
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30 for ( ;; ) {
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31 if (do_write) {
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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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40 if (ngx_event_pipe_read_upstream(p) == NGX_ABORT) {
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41 return NGX_ABORT;
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42 }
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43
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44 if (!p->read && !p->upstream_blocked) {
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45 break;
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46 }
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47
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48 do_write = 1;
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49 }
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50
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51 if (p->upstream->fd != -1) {
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52 rev = p->upstream->read;
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53
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54 flags = (rev->eof || rev->error) ? NGX_CLOSE_EVENT : 0;
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55
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56 if (ngx_handle_read_event(rev, flags) == NGX_ERROR) {
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57 return NGX_ABORT;
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58 }
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59
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60 if (rev->active) {
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61 ngx_add_timer(rev, p->read_timeout);
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62 }
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63 }
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64
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65 if (p->downstream->fd != -1) {
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66 wev = p->downstream->write;
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2
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67 if (ngx_handle_write_event(wev, p->send_lowat) == NGX_ERROR) {
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0
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68 return NGX_ABORT;
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69 }
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70
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71 if (wev->active) {
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72 ngx_add_timer(wev, p->send_timeout);
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73 }
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74 }
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75
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76 return NGX_OK;
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77 }
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78
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79
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80 ngx_int_t ngx_event_pipe_read_upstream(ngx_event_pipe_t *p)
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81 {
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10
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82 ssize_t n, size;
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83 ngx_int_t rc;
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0
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84 ngx_buf_t *b;
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85 ngx_chain_t *chain, *cl, *tl;
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86
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87 if (p->upstream_eof || p->upstream_error || p->upstream_done) {
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88 return NGX_OK;
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89 }
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90
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91 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, p->log, 0,
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92 "pipe read upstream: %d", p->upstream->read->ready);
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93
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94 for ( ;; ) {
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95
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96 if (p->upstream_eof || p->upstream_error || p->upstream_done) {
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97 break;
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98 }
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99
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100 if (p->preread_bufs == NULL && !p->upstream->read->ready) {
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101 break;
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102 }
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103
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104 if (p->preread_bufs) {
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105
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106 /* use the pre-read bufs if they exist */
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107
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108 chain = p->preread_bufs;
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109 p->preread_bufs = NULL;
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110 n = p->preread_size;
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111
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112 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, p->log, 0,
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10
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113 "pipe preread: %z", n);
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0
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114
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115 if (n) {
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116 p->read = 1;
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117 }
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118
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119 } else {
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120
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121 /*
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122 * kqueue notifies about the end of file or a pending error.
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123 * This test allows not to allocate a buf on these conditions
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124 * and not to call ngx_recv_chain().
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125 */
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126
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127 if (p->upstream->read->available == 0
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128 && p->upstream->read->pending_eof)
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129 {
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130 p->upstream->read->ready = 0;
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131 p->upstream->read->eof = 0;
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132 p->upstream_eof = 1;
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133 p->read = 1;
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134
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135 #if (HAVE_KQUEUE)
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136 if (p->upstream->read->kq_errno) {
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137 p->upstream->read->error = 1;
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138 p->upstream_error = 1;
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139 p->upstream_eof = 0;
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140
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141 ngx_log_error(NGX_LOG_ERR, p->log,
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142 p->upstream->read->kq_errno,
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143 "readv() failed");
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144 }
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145 #endif
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146
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147 break;
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148 }
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149
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150 if (p->free_raw_bufs) {
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151
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152 /* use the free bufs if they exist */
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153
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154 chain = p->free_raw_bufs;
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155 if (p->single_buf) {
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156 p->free_raw_bufs = p->free_raw_bufs->next;
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157 chain->next = NULL;
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158 } else {
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159 p->free_raw_bufs = NULL;
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160 }
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161
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162 } else if (p->allocated < p->bufs.num) {
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163
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164 /* allocate a new buf if it's still allowed */
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165
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166 if (!(b = ngx_create_temp_buf(p->pool, p->bufs.size))) {
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167 return NGX_ABORT;
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168 }
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169
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170 p->allocated++;
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171
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172 ngx_alloc_link_and_set_buf(tl, b, p->pool, NGX_ABORT);
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173 chain = tl;
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174
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175 } else if (!p->cachable && p->downstream->write->ready) {
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176
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177 /*
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178 * if the bufs are not needed to be saved in a cache and
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179 * a downstream is ready then write the bufs to a downstream
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180 */
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181
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182 p->upstream_blocked = 1;
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183
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184 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, p->log, 0,
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185 "pipe downstream ready");
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186
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187 break;
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188
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189 } else if (p->cachable
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190 || p->temp_file->offset < p->max_temp_file_size)
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191 {
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192
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193 /*
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194 * if it's allowed then save some bufs from r->in
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195 * to a temporary file, and add them to a r->out chain
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196 */
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197
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198 rc = ngx_event_pipe_write_chain_to_temp_file(p);
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199
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200 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, p->log, 0,
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10
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201 "pipe temp offset: %O", p->temp_file->offset);
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0
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202
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203 if (rc == NGX_AGAIN) {
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204 if (ngx_event_flags & NGX_USE_LEVEL_EVENT
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205 && p->upstream->read->active
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206 && p->upstream->read->ready)
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207 {
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208 if (ngx_del_event(p->upstream->read, NGX_READ_EVENT, 0)
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209 == NGX_ERROR)
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210 {
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211 return NGX_ABORT;
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212 }
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213 }
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214 }
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215
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216 if (rc != NGX_OK) {
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217 return rc;
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218 }
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219
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220 chain = p->free_raw_bufs;
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221 if (p->single_buf) {
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222 p->free_raw_bufs = p->free_raw_bufs->next;
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223 chain->next = NULL;
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224 } else {
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225 p->free_raw_bufs = NULL;
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226 }
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227
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228 } else {
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229
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230 /* if there're no bufs to read in then disable a level event */
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231
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232 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, p->log, 0,
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233 "no pipe bufs to read in");
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234
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235 break;
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236 }
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237
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238 n = ngx_recv_chain(p->upstream, chain);
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239
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240 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, p->log, 0,
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10
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241 "pipe recv chain: %z", n);
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0
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242
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243 if (p->free_raw_bufs) {
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244 chain->next = p->free_raw_bufs;
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245 }
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246 p->free_raw_bufs = chain;
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247
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248 if (n == NGX_ERROR) {
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249 p->upstream_error = 1;
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250 return NGX_ERROR;
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251 }
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252
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253 if (n == NGX_AGAIN) {
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254 if (p->single_buf) {
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255 ngx_event_pipe_remove_shadow_links(chain->buf);
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256 }
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257
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258 break;
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259 }
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260
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261 p->read = 1;
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262
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263 if (n == 0) {
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264 p->upstream_eof = 1;
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265 break;
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266 }
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267 }
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268
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269 p->read_length += n;
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270 cl = chain;
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271
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272 while (cl && n > 0) {
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273
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274 ngx_event_pipe_remove_shadow_links(cl->buf);
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275
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276 size = cl->buf->end - cl->buf->last;
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277
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278 if (n >= size) {
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279 cl->buf->last = cl->buf->end;
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280
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281 /* STUB */ cl->buf->num = p->num++;
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282
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283 if (p->input_filter(p, cl->buf) == NGX_ERROR) {
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284 return NGX_ABORT;
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285 }
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286
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287 n -= size;
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288 cl = cl->next;
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289
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290 } else {
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291 cl->buf->last += n;
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292 n = 0;
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293 }
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294 }
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295
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296 p->free_raw_bufs = cl;
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297 }
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298
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299 #if (NGX_DEBUG)
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300
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301 if (p->in || p->busy || p->free_raw_bufs) {
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302 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, p->log, 0, "pipe buf");
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303 }
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304
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2
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305 for (cl = p->busy; cl; cl = cl->next) {
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0
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306 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, p->log, 0,
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10
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307 "pipe buf busy %p, pos %p, size: %z",
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0
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308 cl->buf->start, cl->buf->pos,
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309 cl->buf->last - cl->buf->pos);
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310 }
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311
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2
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312 for (cl = p->out; cl; cl = cl->next) {
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313 if (cl->buf->in_file && cl->buf->temporary) {
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314 ngx_log_debug5(NGX_LOG_DEBUG_EVENT, p->log, 0,
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10
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315 "pipe buf out shadow %p, pos %p, size: %z "
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316 "file: %O, size: %z",
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2
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317 cl->buf->start, cl->buf->pos,
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318 cl->buf->last - cl->buf->pos,
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319 cl->buf->file_pos,
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320 cl->buf->file_last - cl->buf->file_pos);
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321
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322 } else if (cl->buf->in_file) {
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323 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, p->log, 0,
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10
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324 "pipe buf out file %O, size: %z",
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2
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325 cl->buf->file_pos,
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326 cl->buf->file_last - cl->buf->file_pos);
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327 } else {
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328 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, p->log, 0,
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10
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329 "pipe buf out %p, pos %p, size: %z",
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2
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330 cl->buf->start, cl->buf->pos,
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331 cl->buf->last - cl->buf->pos);
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332 }
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333 }
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334
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335 for (cl = p->in; cl; cl = cl->next) {
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0
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336 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, p->log, 0,
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10
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337 "pipe buf in %p, pos %p, size: %z",
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0
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338 cl->buf->start, cl->buf->pos,
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339 cl->buf->last - cl->buf->pos);
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340 }
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341
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342 for (cl = p->free_raw_bufs; cl; cl = cl->next) {
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343 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, p->log, 0,
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10
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344 "pipe buf free %p, last %p, size: %z",
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0
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345 cl->buf->start, cl->buf->last,
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346 cl->buf->end - cl->buf->last);
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347 }
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348
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349 #endif
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350
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351 if ((p->upstream_eof || p->upstream_error) && p->free_raw_bufs) {
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352
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353 /* STUB */ p->free_raw_bufs->buf->num = p->num++;
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354
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355 if (p->input_filter(p, p->free_raw_bufs->buf) == NGX_ERROR) {
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356 return NGX_ABORT;
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357 }
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358
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359 p->free_raw_bufs = p->free_raw_bufs->next;
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360
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361 if (p->free_bufs) {
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362 for (cl = p->free_raw_bufs; cl; cl = cl->next) {
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2
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363 if (cl->buf->shadow == NULL) {
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364 ngx_pfree(p->pool, cl->buf->start);
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365 }
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0
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366 }
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367 }
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368 }
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369
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370 if (p->cachable && p->in) {
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371 if (ngx_event_pipe_write_chain_to_temp_file(p) == NGX_ABORT) {
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372 return NGX_ABORT;
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373 }
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374 }
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375
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376 return NGX_OK;
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377 }
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378
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379
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380 ngx_int_t ngx_event_pipe_write_to_downstream(ngx_event_pipe_t *p)
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381 {
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382 size_t bsize;
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383 ngx_uint_t flush;
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384 ngx_buf_t *b;
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385 ngx_chain_t *out, **ll, *cl, *tl;
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386
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387 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, p->log, 0,
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388 "pipe write downstream: %d", p->downstream->write->ready);
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389
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390 for ( ;; ) {
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391 if (p->downstream_error) {
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392 return ngx_event_pipe_drain_chains(p);
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393 }
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394
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395 if (p->upstream_eof || p->upstream_error || p->upstream_done) {
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396
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397 /* pass the p->out and p->in chains to the output filter */
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398
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399 if (p->out) {
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400 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, p->log, 0,
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401 "pipe write downstream flush out");
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402
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403 if (p->output_filter(p->output_ctx, p->out) == NGX_ERROR) {
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404 p->downstream_error = 1;
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405 return ngx_event_pipe_drain_chains(p);
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406 }
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407
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408 p->out = NULL;
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409 }
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410
|
|
|
411 if (p->in) {
|
|
|
412 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, p->log, 0,
|
|
|
413 "pipe write downstream flush in");
|
|
|
414
|
|
|
415 if (p->output_filter(p->output_ctx, p->in) == NGX_ERROR) {
|
|
|
416 p->downstream_error = 1;
|
|
|
417 return ngx_event_pipe_drain_chains(p);
|
|
|
418 }
|
|
|
419
|
|
|
420 p->in = NULL;
|
|
|
421 }
|
|
|
422
|
|
|
423 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, p->log, 0,
|
|
|
424 "pipe write downstream done");
|
|
|
425
|
|
|
426 /* TODO: free unused bufs */
|
|
|
427
|
|
|
428 p->downstream_done = 1;
|
|
|
429 break;
|
|
|
430 }
|
|
|
431
|
|
|
432 if (!p->downstream->write->ready) {
|
|
|
433 break;
|
|
|
434 }
|
|
|
435
|
|
|
436 /* bsize is the size of the busy bufs */
|
|
|
437
|
|
|
438 bsize = 0;
|
|
|
439
|
|
|
440 for (cl = p->busy; cl; cl = cl->next) {
|
|
|
441 bsize += cl->buf->end - cl->buf->start;
|
|
|
442 }
|
|
|
443
|
|
|
444 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, p->log, 0,
|
|
10
|
445 "pipe write busy: %uz", bsize);
|
|
0
|
446
|
|
|
447 out = NULL;
|
|
|
448 ll = NULL;
|
|
|
449 flush = 0;
|
|
|
450
|
|
|
451 for ( ;; ) {
|
|
|
452 if (p->out) {
|
|
|
453 cl = p->out;
|
|
|
454
|
|
|
455 if (bsize + ngx_buf_size(cl->buf) > p->busy_size) {
|
|
|
456 flush = 1;
|
|
|
457 break;
|
|
|
458 }
|
|
|
459
|
|
|
460 p->out = p->out->next;
|
|
|
461 ngx_event_pipe_free_shadow_raw_buf(&p->free_raw_bufs,
|
|
|
462 cl->buf);
|
|
|
463
|
|
|
464 } else if (!p->cachable && p->in) {
|
|
|
465 cl = p->in;
|
|
|
466
|
|
|
467 if (bsize + ngx_buf_size(cl->buf) > p->busy_size) {
|
|
|
468 flush = 1;
|
|
|
469 break;
|
|
|
470 }
|
|
|
471
|
|
|
472 p->in = p->in->next;
|
|
|
473
|
|
|
474 } else {
|
|
|
475 break;
|
|
|
476 }
|
|
|
477
|
|
|
478 bsize += ngx_buf_size(cl->buf);
|
|
|
479 cl->next = NULL;
|
|
|
480 ngx_chain_add_link(out, ll, cl);
|
|
|
481 }
|
|
|
482
|
|
|
483 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, p->log, 0,
|
|
10
|
484 "pipe write: out:%p, f:%d", out, flush);
|
|
0
|
485
|
|
|
486 if (out == NULL && !flush) {
|
|
|
487 break;
|
|
|
488 }
|
|
|
489
|
|
|
490 if (p->output_filter(p->output_ctx, out) == NGX_ERROR) {
|
|
|
491 p->downstream_error = 1;
|
|
|
492 return ngx_event_pipe_drain_chains(p);
|
|
|
493 }
|
|
|
494
|
|
|
495 ngx_chain_update_chains(&p->free, &p->busy, &out, p->tag);
|
|
|
496
|
|
|
497 for (cl = p->free; cl; cl = cl->next) {
|
|
|
498
|
|
|
499 if (cl->buf->temp_file) {
|
|
|
500 if (p->cachable || !p->cyclic_temp_file) {
|
|
|
501 continue;
|
|
|
502 }
|
|
|
503
|
|
|
504 /* reset p->temp_offset if all bufs had been sent */
|
|
|
505
|
|
|
506 if (cl->buf->file_last == p->temp_file->offset) {
|
|
|
507 p->temp_file->offset = 0;
|
|
|
508 }
|
|
|
509 }
|
|
|
510
|
|
|
511 /* TODO: free buf if p->free_bufs && upstream done */
|
|
|
512
|
|
|
513 /* add the free shadow raw buf to p->free_raw_bufs */
|
|
|
514
|
|
|
515 if (cl->buf->last_shadow) {
|
|
|
516 b = cl->buf->shadow;
|
|
|
517 b->pos = b->last = b->start;
|
|
|
518 b->shadow = NULL;
|
|
|
519 ngx_alloc_link_and_set_buf(tl, b, p->pool, NGX_ABORT);
|
|
|
520 ngx_event_pipe_add_free_buf(&p->free_raw_bufs, tl);
|
|
|
521
|
|
|
522 cl->buf->last_shadow = 0;
|
|
|
523 }
|
|
|
524
|
|
|
525 cl->buf->shadow = NULL;
|
|
|
526 }
|
|
|
527 }
|
|
|
528
|
|
|
529 return NGX_OK;
|
|
|
530 }
|
|
|
531
|
|
|
532
|
|
|
533 static ngx_int_t ngx_event_pipe_write_chain_to_temp_file(ngx_event_pipe_t *p)
|
|
|
534 {
|
|
|
535 ssize_t size, bsize;
|
|
|
536 ngx_buf_t *b;
|
|
|
537 ngx_chain_t *cl, *tl, *next, *out, **ll, **last_free, fl;
|
|
|
538
|
|
|
539 if (p->buf_to_file) {
|
|
|
540 fl.buf = p->buf_to_file;
|
|
|
541 fl.next = p->in;
|
|
|
542 out = &fl;
|
|
|
543
|
|
|
544 } else {
|
|
|
545 out = p->in;
|
|
|
546 }
|
|
|
547
|
|
|
548 if (!p->cachable) {
|
|
|
549
|
|
|
550 size = 0;
|
|
|
551 cl = out;
|
|
|
552 ll = NULL;
|
|
|
553
|
|
|
554 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, p->log, 0,
|
|
10
|
555 "pipe offset: %O", p->temp_file->offset);
|
|
0
|
556
|
|
|
557 do {
|
|
|
558 bsize = cl->buf->last - cl->buf->pos;
|
|
|
559
|
|
|
560 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, p->log, 0,
|
|
10
|
561 "pipe buf %p, pos %p, size: %z",
|
|
0
|
562 cl->buf->start, cl->buf->pos, bsize);
|
|
|
563
|
|
|
564 if ((size + bsize > p->temp_file_write_size)
|
|
|
565 || (p->temp_file->offset + size + bsize > p->max_temp_file_size))
|
|
|
566 {
|
|
|
567 break;
|
|
|
568 }
|
|
|
569
|
|
|
570 size += bsize;
|
|
|
571 ll = &cl->next;
|
|
|
572 cl = cl->next;
|
|
|
573
|
|
|
574 } while (cl);
|
|
|
575
|
|
10
|
576 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, p->log, 0, "size: %z", size);
|
|
0
|
577
|
|
|
578 if (cl) {
|
|
|
579 p->in = cl;
|
|
|
580 *ll = NULL;
|
|
|
581
|
|
|
582 } else {
|
|
|
583 p->in = NULL;
|
|
|
584 p->last_in = &p->in;
|
|
|
585 }
|
|
|
586
|
|
|
587 } else {
|
|
|
588 p->in = NULL;
|
|
|
589 p->last_in = &p->in;
|
|
|
590 }
|
|
|
591
|
|
|
592 if (ngx_write_chain_to_temp_file(p->temp_file, out) == NGX_ERROR) {
|
|
|
593 return NGX_ABORT;
|
|
|
594 }
|
|
|
595
|
|
|
596 for (last_free = &p->free_raw_bufs;
|
|
|
597 *last_free != NULL;
|
|
|
598 last_free = &(*last_free)->next)
|
|
|
599 {
|
|
|
600 /* void */
|
|
|
601 }
|
|
|
602
|
|
|
603 if (p->buf_to_file) {
|
|
|
604 p->temp_file->offset = p->buf_to_file->last - p->buf_to_file->pos;
|
|
|
605 p->buf_to_file = NULL;
|
|
|
606 out = out->next;
|
|
|
607 }
|
|
|
608
|
|
|
609 for (cl = out; cl; cl = next) {
|
|
|
610 next = cl->next;
|
|
|
611 cl->next = NULL;
|
|
|
612
|
|
|
613 b = cl->buf;
|
|
|
614 b->file = &p->temp_file->file;
|
|
|
615 b->file_pos = p->temp_file->offset;
|
|
|
616 p->temp_file->offset += b->last - b->pos;
|
|
|
617 b->file_last = p->temp_file->offset;
|
|
|
618
|
|
|
619 b->in_file = 1;
|
|
|
620 b->temp_file = 1;
|
|
6
|
621 b->temporary = 0;
|
|
|
622 b->recycled = 0;
|
|
0
|
623
|
|
|
624 ngx_chain_add_link(p->out, p->last_out, cl);
|
|
|
625
|
|
|
626 if (b->last_shadow) {
|
|
2
|
627 b->shadow->pos = b->shadow->start;
|
|
|
628 b->shadow->last = b->shadow->start;
|
|
|
629
|
|
0
|
630 ngx_alloc_link_and_set_buf(tl, b->shadow, p->pool, NGX_ABORT);
|
|
2
|
631
|
|
0
|
632 *last_free = tl;
|
|
|
633 last_free = &tl->next;
|
|
|
634 }
|
|
|
635 }
|
|
|
636
|
|
|
637 return NGX_OK;
|
|
|
638 }
|
|
|
639
|
|
|
640
|
|
|
641 /* the copy input filter */
|
|
|
642
|
|
|
643 ngx_int_t ngx_event_pipe_copy_input_filter(ngx_event_pipe_t *p, ngx_buf_t *buf)
|
|
|
644 {
|
|
|
645 ngx_buf_t *b;
|
|
|
646 ngx_chain_t *cl;
|
|
|
647
|
|
|
648 if (buf->pos == buf->last) {
|
|
|
649 return NGX_OK;
|
|
|
650 }
|
|
|
651
|
|
|
652 if (p->free) {
|
|
|
653 b = p->free->buf;
|
|
|
654 p->free = p->free->next;
|
|
|
655
|
|
|
656 } else {
|
|
|
657 if (!(b = ngx_alloc_buf(p->pool))) {
|
|
|
658 return NGX_ERROR;
|
|
|
659 }
|
|
|
660 }
|
|
|
661
|
|
|
662 ngx_memcpy(b, buf, sizeof(ngx_buf_t));
|
|
|
663 b->shadow = buf;
|
|
|
664 b->tag = p->tag;
|
|
|
665 b->last_shadow = 1;
|
|
|
666 b->recycled = 1;
|
|
|
667 buf->shadow = b;
|
|
|
668
|
|
|
669 ngx_alloc_link_and_set_buf(cl, b, p->pool, NGX_ERROR);
|
|
|
670
|
|
|
671 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, p->log, 0, "buf #%d", b->num);
|
|
|
672
|
|
|
673 ngx_chain_add_link(p->in, p->last_in, cl);
|
|
|
674
|
|
|
675 return NGX_OK;
|
|
|
676 }
|
|
|
677
|
|
|
678
|
|
|
679 ngx_inline static void ngx_event_pipe_remove_shadow_links(ngx_buf_t *buf)
|
|
|
680 {
|
|
|
681 ngx_buf_t *b, *next;
|
|
|
682
|
|
2
|
683 b = buf->shadow;
|
|
|
684
|
|
|
685 if (b == NULL) {
|
|
0
|
686 return;
|
|
|
687 }
|
|
|
688
|
|
|
689 while (!b->last_shadow) {
|
|
|
690 next = b->shadow;
|
|
|
691
|
|
2
|
692 b->temporary = 0;
|
|
|
693 b->recycled = 0;
|
|
0
|
694
|
|
|
695 b->shadow = NULL;
|
|
|
696 b = next;
|
|
|
697 }
|
|
|
698
|
|
2
|
699 b->temporary = 0;
|
|
|
700 b->recycled = 0;
|
|
0
|
701 b->last_shadow = 0;
|
|
|
702
|
|
|
703 b->shadow = NULL;
|
|
|
704
|
|
|
705 buf->shadow = NULL;
|
|
|
706 }
|
|
|
707
|
|
|
708
|
|
|
709 ngx_inline static void ngx_event_pipe_free_shadow_raw_buf(ngx_chain_t **free,
|
|
|
710 ngx_buf_t *buf)
|
|
|
711 {
|
|
|
712 ngx_buf_t *s;
|
|
|
713 ngx_chain_t *cl, **ll;
|
|
|
714
|
|
|
715 if (buf->shadow == NULL) {
|
|
|
716 return;
|
|
|
717 }
|
|
|
718
|
|
|
719 for (s = buf->shadow; !s->last_shadow; s = s->shadow) { /* void */ }
|
|
|
720
|
|
|
721 ll = free;
|
|
|
722
|
|
|
723 for (cl = *free ; cl; cl = cl->next) {
|
|
|
724 if (cl->buf == s) {
|
|
|
725 *ll = cl->next;
|
|
|
726 break;
|
|
|
727 }
|
|
|
728
|
|
|
729 if (cl->buf->shadow) {
|
|
|
730 break;
|
|
|
731 }
|
|
|
732
|
|
|
733 ll = &cl->next;
|
|
|
734 }
|
|
|
735 }
|
|
|
736
|
|
|
737
|
|
|
738 ngx_inline static void ngx_event_pipe_add_free_buf(ngx_chain_t **chain,
|
|
|
739 ngx_chain_t *cl)
|
|
|
740 {
|
|
|
741 if (*chain == NULL) {
|
|
|
742 *chain = cl;
|
|
|
743 return;
|
|
|
744 }
|
|
|
745
|
|
|
746 if ((*chain)->buf->pos != (*chain)->buf->last) {
|
|
|
747 cl->next = (*chain)->next;
|
|
|
748 (*chain)->next = cl;
|
|
|
749
|
|
|
750 } else {
|
|
|
751 cl->next = (*chain);
|
|
|
752 (*chain) = cl;
|
|
|
753 }
|
|
|
754 }
|
|
|
755
|
|
|
756
|
|
|
757 static ngx_int_t ngx_event_pipe_drain_chains(ngx_event_pipe_t *p)
|
|
|
758 {
|
|
|
759 ngx_buf_t *b;
|
|
|
760 ngx_chain_t *cl, *tl;
|
|
|
761
|
|
|
762 for ( ;; ) {
|
|
|
763 if (p->busy) {
|
|
|
764 cl = p->busy;
|
|
|
765 p->busy = NULL;
|
|
|
766
|
|
|
767 } else if (p->out) {
|
|
|
768 cl = p->out;
|
|
|
769 p->out = NULL;
|
|
|
770
|
|
|
771 } else if (p->in) {
|
|
|
772 cl = p->in;
|
|
|
773 p->in = NULL;
|
|
|
774
|
|
|
775 } else {
|
|
|
776 return NGX_OK;
|
|
|
777 }
|
|
|
778
|
|
|
779 while (cl) {
|
|
|
780 if (cl->buf->last_shadow) {
|
|
|
781 b = cl->buf->shadow;
|
|
|
782 b->pos = b->last = b->start;
|
|
|
783 b->shadow = NULL;
|
|
|
784 ngx_alloc_link_and_set_buf(tl, b, p->pool, NGX_ABORT);
|
|
|
785 ngx_event_pipe_add_free_buf(&p->free_raw_bufs, tl);
|
|
|
786
|
|
|
787 cl->buf->last_shadow = 0;
|
|
|
788 }
|
|
|
789
|
|
|
790 cl->buf->shadow = NULL;
|
|
|
791 tl = cl->next;
|
|
|
792 cl->next = p->free;
|
|
|
793 p->free = cl;
|
|
|
794 cl = tl;
|
|
|
795 }
|
|
|
796 }
|
|
|
797 }
|
