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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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56
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87 ngx_chain_t *chain, *cl, *ln;
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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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50
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168 b = ngx_create_temp_buf(p->pool, p->bufs.size);
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169 if (b == NULL) {
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0
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170 return NGX_ABORT;
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171 }
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172
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173 p->allocated++;
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174
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50
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175 chain = ngx_alloc_chain_link(p->pool);
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176 if (chain == NULL) {
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32
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177 return NGX_ABORT;
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178 }
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179
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180 chain->buf = b;
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181 chain->next = NULL;
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0
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182
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183 } else if (!p->cachable && p->downstream->write->ready) {
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184
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185 /*
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186 * if the bufs are not needed to be saved in a cache and
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187 * a downstream is ready then write the bufs to a downstream
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188 */
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189
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190 p->upstream_blocked = 1;
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191
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192 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, p->log, 0,
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193 "pipe downstream ready");
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194
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195 break;
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196
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197 } else if (p->cachable
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198 || p->temp_file->offset < p->max_temp_file_size)
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199 {
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200
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201 /*
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32
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202 * if it is allowed, then save some bufs from r->in
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0
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203 * to a temporary file, and add them to a r->out chain
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204 */
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205
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206 rc = ngx_event_pipe_write_chain_to_temp_file(p);
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207
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208 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, p->log, 0,
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10
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209 "pipe temp offset: %O", p->temp_file->offset);
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0
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210
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211 if (rc == NGX_AGAIN) {
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212 if (ngx_event_flags & NGX_USE_LEVEL_EVENT
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213 && p->upstream->read->active
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214 && p->upstream->read->ready)
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215 {
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216 if (ngx_del_event(p->upstream->read, NGX_READ_EVENT, 0)
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217 == NGX_ERROR)
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218 {
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219 return NGX_ABORT;
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220 }
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221 }
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222 }
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223
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224 if (rc != NGX_OK) {
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225 return rc;
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226 }
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227
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228 chain = p->free_raw_bufs;
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229 if (p->single_buf) {
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230 p->free_raw_bufs = p->free_raw_bufs->next;
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231 chain->next = NULL;
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232 } else {
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233 p->free_raw_bufs = NULL;
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234 }
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235
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236 } else {
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237
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32
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238 /* there are no bufs to read in */
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0
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239
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240 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, p->log, 0,
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241 "no pipe bufs to read in");
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242
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243 break;
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244 }
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245
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246 n = ngx_recv_chain(p->upstream, chain);
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247
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248 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, p->log, 0,
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10
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249 "pipe recv chain: %z", n);
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0
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250
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251 if (p->free_raw_bufs) {
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252 chain->next = p->free_raw_bufs;
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253 }
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254 p->free_raw_bufs = chain;
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255
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256 if (n == NGX_ERROR) {
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257 p->upstream_error = 1;
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258 return NGX_ERROR;
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259 }
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260
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261 if (n == NGX_AGAIN) {
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262 if (p->single_buf) {
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263 ngx_event_pipe_remove_shadow_links(chain->buf);
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264 }
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265
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266 break;
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267 }
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268
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269 p->read = 1;
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270
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271 if (n == 0) {
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272 p->upstream_eof = 1;
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273 break;
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274 }
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275 }
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276
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277 p->read_length += n;
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278 cl = chain;
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279
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280 while (cl && n > 0) {
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281
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282 ngx_event_pipe_remove_shadow_links(cl->buf);
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283
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284 size = cl->buf->end - cl->buf->last;
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285
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286 if (n >= size) {
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287 cl->buf->last = cl->buf->end;
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288
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289 /* STUB */ cl->buf->num = p->num++;
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290
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291 if (p->input_filter(p, cl->buf) == NGX_ERROR) {
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292 return NGX_ABORT;
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293 }
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294
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295 n -= size;
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56
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296 ln = cl;
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0
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297 cl = cl->next;
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56
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298 ngx_free_chain(p->pool, ln);
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0
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299
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300 } else {
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301 cl->buf->last += n;
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302 n = 0;
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303 }
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304 }
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305
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306 p->free_raw_bufs = cl;
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307 }
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308
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309 #if (NGX_DEBUG)
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310
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2
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311 for (cl = p->busy; cl; cl = cl->next) {
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32
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312 ngx_log_debug8(NGX_LOG_DEBUG_EVENT, p->log, 0,
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313 "pipe buf busy s:%d t:%d f:%d "
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314 "%p, pos %p, size: %z "
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315 "file: %O, size: %z",
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316 (cl->buf->shadow ? 1 : 0),
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317 cl->buf->temporary, cl->buf->in_file,
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0
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318 cl->buf->start, cl->buf->pos,
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32
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319 cl->buf->last - cl->buf->pos,
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320 cl->buf->file_pos,
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321 cl->buf->file_last - cl->buf->file_pos);
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0
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322 }
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323
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2
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324 for (cl = p->out; cl; cl = cl->next) {
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32
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325 ngx_log_debug8(NGX_LOG_DEBUG_EVENT, p->log, 0,
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326 "pipe buf out s:%d t:%d f:%d "
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327 "%p, pos %p, size: %z "
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328 "file: %O, size: %z",
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329 (cl->buf->shadow ? 1 : 0),
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330 cl->buf->temporary, cl->buf->in_file,
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331 cl->buf->start, cl->buf->pos,
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332 cl->buf->last - cl->buf->pos,
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333 cl->buf->file_pos,
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334 cl->buf->file_last - cl->buf->file_pos);
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2
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335 }
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336
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337 for (cl = p->in; cl; cl = cl->next) {
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32
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338 ngx_log_debug8(NGX_LOG_DEBUG_EVENT, p->log, 0,
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339 "pipe buf in s:%d t:%d f:%d "
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340 "%p, pos %p, size: %z "
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341 "file: %O, size: %z",
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342 (cl->buf->shadow ? 1 : 0),
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343 cl->buf->temporary, cl->buf->in_file,
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0
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344 cl->buf->start, cl->buf->pos,
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32
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345 cl->buf->last - cl->buf->pos,
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346 cl->buf->file_pos,
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347 cl->buf->file_last - cl->buf->file_pos);
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0
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348 }
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349
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350 for (cl = p->free_raw_bufs; cl; cl = cl->next) {
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32
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351 ngx_log_debug8(NGX_LOG_DEBUG_EVENT, p->log, 0,
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352 "pipe buf free s:%d t:%d f:%d "
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353 "%p, pos %p, size: %z "
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354 "file: %O, size: %z",
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355 (cl->buf->shadow ? 1 : 0),
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356 cl->buf->temporary, cl->buf->in_file,
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357 cl->buf->start, cl->buf->pos,
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358 cl->buf->last - cl->buf->pos,
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359 cl->buf->file_pos,
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360 cl->buf->file_last - cl->buf->file_pos);
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0
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361 }
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362
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363 #endif
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364
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365 if ((p->upstream_eof || p->upstream_error) && p->free_raw_bufs) {
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366
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367 /* STUB */ p->free_raw_bufs->buf->num = p->num++;
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368
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369 if (p->input_filter(p, p->free_raw_bufs->buf) == NGX_ERROR) {
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370 return NGX_ABORT;
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371 }
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372
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373 p->free_raw_bufs = p->free_raw_bufs->next;
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374
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375 if (p->free_bufs) {
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376 for (cl = p->free_raw_bufs; cl; cl = cl->next) {
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2
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377 if (cl->buf->shadow == NULL) {
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378 ngx_pfree(p->pool, cl->buf->start);
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379 }
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0
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380 }
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381 }
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382 }
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383
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384 if (p->cachable && p->in) {
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385 if (ngx_event_pipe_write_chain_to_temp_file(p) == NGX_ABORT) {
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386 return NGX_ABORT;
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387 }
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388 }
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389
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390 return NGX_OK;
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391 }
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392
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393
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32
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394 static ngx_int_t ngx_event_pipe_write_to_downstream(ngx_event_pipe_t *p)
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0
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395 {
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28
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396 size_t bsize;
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0
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397 ngx_uint_t flush;
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32
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398 ngx_chain_t *out, **ll, *cl;
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0
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399
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400 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, p->log, 0,
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401 "pipe write downstream: %d", p->downstream->write->ready);
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402
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403 for ( ;; ) {
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404 if (p->downstream_error) {
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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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|
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408 if (p->upstream_eof || p->upstream_error || p->upstream_done) {
|
|
|
409
|
|
|
410 /* pass the p->out and p->in chains to the output filter */
|
|
|
411
|
|
|
412 if (p->out) {
|
|
|
413 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, p->log, 0,
|
|
|
414 "pipe write downstream flush out");
|
|
|
415
|
|
|
416 if (p->output_filter(p->output_ctx, p->out) == NGX_ERROR) {
|
|
|
417 p->downstream_error = 1;
|
|
|
418 return ngx_event_pipe_drain_chains(p);
|
|
|
419 }
|
|
|
420
|
|
|
421 p->out = NULL;
|
|
|
422 }
|
|
|
423
|
|
|
424 if (p->in) {
|
|
|
425 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, p->log, 0,
|
|
|
426 "pipe write downstream flush in");
|
|
|
427
|
|
|
428 if (p->output_filter(p->output_ctx, p->in) == NGX_ERROR) {
|
|
|
429 p->downstream_error = 1;
|
|
|
430 return ngx_event_pipe_drain_chains(p);
|
|
|
431 }
|
|
|
432
|
|
|
433 p->in = NULL;
|
|
|
434 }
|
|
|
435
|
|
|
436 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, p->log, 0,
|
|
|
437 "pipe write downstream done");
|
|
|
438
|
|
|
439 /* TODO: free unused bufs */
|
|
|
440
|
|
|
441 p->downstream_done = 1;
|
|
|
442 break;
|
|
|
443 }
|
|
|
444
|
|
|
445 if (!p->downstream->write->ready) {
|
|
|
446 break;
|
|
|
447 }
|
|
|
448
|
|
28
|
449 /* bsize is the size of the busy recycled bufs */
|
|
0
|
450
|
|
|
451 bsize = 0;
|
|
|
452
|
|
|
453 for (cl = p->busy; cl; cl = cl->next) {
|
|
28
|
454 if (cl->buf->recycled) {
|
|
|
455 bsize += cl->buf->end - cl->buf->start;
|
|
|
456 }
|
|
0
|
457 }
|
|
|
458
|
|
|
459 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, p->log, 0,
|
|
28
|
460 "pipe write busy: %uz", bsize);
|
|
0
|
461
|
|
|
462 out = NULL;
|
|
|
463 ll = NULL;
|
|
|
464 flush = 0;
|
|
|
465
|
|
|
466 for ( ;; ) {
|
|
|
467 if (p->out) {
|
|
|
468 cl = p->out;
|
|
|
469
|
|
28
|
470 if (cl->buf->recycled
|
|
|
471 && bsize + cl->buf->last - cl->buf->pos > p->busy_size)
|
|
|
472 {
|
|
0
|
473 flush = 1;
|
|
|
474 break;
|
|
|
475 }
|
|
|
476
|
|
|
477 p->out = p->out->next;
|
|
28
|
478
|
|
|
479 ngx_event_pipe_free_shadow_raw_buf(&p->free_raw_bufs, cl->buf);
|
|
0
|
480
|
|
|
481 } else if (!p->cachable && p->in) {
|
|
|
482 cl = p->in;
|
|
|
483
|
|
28
|
484 if (cl->buf->recycled
|
|
|
485 && bsize + cl->buf->last - cl->buf->pos > p->busy_size)
|
|
|
486 {
|
|
0
|
487 flush = 1;
|
|
|
488 break;
|
|
|
489 }
|
|
|
490
|
|
|
491 p->in = p->in->next;
|
|
|
492
|
|
|
493 } else {
|
|
|
494 break;
|
|
|
495 }
|
|
|
496
|
|
28
|
497 if (cl->buf->recycled) {
|
|
|
498 bsize += cl->buf->last - cl->buf->pos;
|
|
|
499 }
|
|
|
500
|
|
0
|
501 cl->next = NULL;
|
|
50
|
502
|
|
|
503 if (out) {
|
|
|
504 *ll = cl;
|
|
|
505 } else {
|
|
|
506 out = cl;
|
|
|
507 }
|
|
|
508 ll = &cl->next;
|
|
0
|
509 }
|
|
|
510
|
|
|
511 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, p->log, 0,
|
|
10
|
512 "pipe write: out:%p, f:%d", out, flush);
|
|
0
|
513
|
|
|
514 if (out == NULL && !flush) {
|
|
|
515 break;
|
|
|
516 }
|
|
|
517
|
|
|
518 if (p->output_filter(p->output_ctx, out) == NGX_ERROR) {
|
|
|
519 p->downstream_error = 1;
|
|
|
520 return ngx_event_pipe_drain_chains(p);
|
|
|
521 }
|
|
|
522
|
|
|
523 ngx_chain_update_chains(&p->free, &p->busy, &out, p->tag);
|
|
|
524
|
|
|
525 for (cl = p->free; cl; cl = cl->next) {
|
|
|
526
|
|
|
527 if (cl->buf->temp_file) {
|
|
|
528 if (p->cachable || !p->cyclic_temp_file) {
|
|
|
529 continue;
|
|
|
530 }
|
|
|
531
|
|
|
532 /* reset p->temp_offset if all bufs had been sent */
|
|
|
533
|
|
|
534 if (cl->buf->file_last == p->temp_file->offset) {
|
|
|
535 p->temp_file->offset = 0;
|
|
|
536 }
|
|
|
537 }
|
|
|
538
|
|
|
539 /* TODO: free buf if p->free_bufs && upstream done */
|
|
|
540
|
|
|
541 /* add the free shadow raw buf to p->free_raw_bufs */
|
|
|
542
|
|
|
543 if (cl->buf->last_shadow) {
|
|
32
|
544 if (ngx_event_pipe_add_free_buf(p, cl->buf->shadow) != NGX_OK) {
|
|
|
545 return NGX_ABORT;
|
|
|
546 }
|
|
0
|
547
|
|
|
548 cl->buf->last_shadow = 0;
|
|
|
549 }
|
|
|
550
|
|
|
551 cl->buf->shadow = NULL;
|
|
|
552 }
|
|
|
553 }
|
|
|
554
|
|
|
555 return NGX_OK;
|
|
|
556 }
|
|
|
557
|
|
|
558
|
|
|
559 static ngx_int_t ngx_event_pipe_write_chain_to_temp_file(ngx_event_pipe_t *p)
|
|
|
560 {
|
|
|
561 ssize_t size, bsize;
|
|
|
562 ngx_buf_t *b;
|
|
|
563 ngx_chain_t *cl, *tl, *next, *out, **ll, **last_free, fl;
|
|
|
564
|
|
|
565 if (p->buf_to_file) {
|
|
|
566 fl.buf = p->buf_to_file;
|
|
|
567 fl.next = p->in;
|
|
|
568 out = &fl;
|
|
|
569
|
|
|
570 } else {
|
|
|
571 out = p->in;
|
|
|
572 }
|
|
|
573
|
|
|
574 if (!p->cachable) {
|
|
|
575
|
|
|
576 size = 0;
|
|
|
577 cl = out;
|
|
|
578 ll = NULL;
|
|
|
579
|
|
|
580 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, p->log, 0,
|
|
10
|
581 "pipe offset: %O", p->temp_file->offset);
|
|
0
|
582
|
|
|
583 do {
|
|
|
584 bsize = cl->buf->last - cl->buf->pos;
|
|
|
585
|
|
|
586 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, p->log, 0,
|
|
10
|
587 "pipe buf %p, pos %p, size: %z",
|
|
0
|
588 cl->buf->start, cl->buf->pos, bsize);
|
|
|
589
|
|
|
590 if ((size + bsize > p->temp_file_write_size)
|
|
|
591 || (p->temp_file->offset + size + bsize > p->max_temp_file_size))
|
|
|
592 {
|
|
|
593 break;
|
|
|
594 }
|
|
|
595
|
|
|
596 size += bsize;
|
|
|
597 ll = &cl->next;
|
|
|
598 cl = cl->next;
|
|
|
599
|
|
|
600 } while (cl);
|
|
|
601
|
|
10
|
602 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, p->log, 0, "size: %z", size);
|
|
0
|
603
|
|
|
604 if (cl) {
|
|
|
605 p->in = cl;
|
|
|
606 *ll = NULL;
|
|
|
607
|
|
|
608 } else {
|
|
|
609 p->in = NULL;
|
|
|
610 p->last_in = &p->in;
|
|
|
611 }
|
|
|
612
|
|
|
613 } else {
|
|
|
614 p->in = NULL;
|
|
|
615 p->last_in = &p->in;
|
|
|
616 }
|
|
|
617
|
|
|
618 if (ngx_write_chain_to_temp_file(p->temp_file, out) == NGX_ERROR) {
|
|
|
619 return NGX_ABORT;
|
|
|
620 }
|
|
|
621
|
|
|
622 for (last_free = &p->free_raw_bufs;
|
|
|
623 *last_free != NULL;
|
|
|
624 last_free = &(*last_free)->next)
|
|
|
625 {
|
|
|
626 /* void */
|
|
|
627 }
|
|
|
628
|
|
|
629 if (p->buf_to_file) {
|
|
|
630 p->temp_file->offset = p->buf_to_file->last - p->buf_to_file->pos;
|
|
|
631 p->buf_to_file = NULL;
|
|
|
632 out = out->next;
|
|
|
633 }
|
|
|
634
|
|
|
635 for (cl = out; cl; cl = next) {
|
|
|
636 next = cl->next;
|
|
|
637 cl->next = NULL;
|
|
|
638
|
|
|
639 b = cl->buf;
|
|
|
640 b->file = &p->temp_file->file;
|
|
|
641 b->file_pos = p->temp_file->offset;
|
|
|
642 p->temp_file->offset += b->last - b->pos;
|
|
|
643 b->file_last = p->temp_file->offset;
|
|
|
644
|
|
|
645 b->in_file = 1;
|
|
|
646 b->temp_file = 1;
|
|
|
647
|
|
50
|
648 if (p->out) {
|
|
|
649 *p->last_out = cl;
|
|
|
650 } else {
|
|
|
651 p->out = cl;
|
|
|
652 }
|
|
|
653 p->last_out = &cl->next;
|
|
0
|
654
|
|
|
655 if (b->last_shadow) {
|
|
32
|
656
|
|
50
|
657 tl = ngx_alloc_chain_link(p->pool);
|
|
|
658 if (tl == NULL) {
|
|
32
|
659 return NGX_ABORT;
|
|
|
660 }
|
|
|
661
|
|
|
662 tl->buf = b->shadow;
|
|
|
663 tl->next = NULL;
|
|
|
664
|
|
|
665 *last_free = tl;
|
|
|
666 last_free = &tl->next;
|
|
|
667
|
|
2
|
668 b->shadow->pos = b->shadow->start;
|
|
|
669 b->shadow->last = b->shadow->start;
|
|
|
670
|
|
32
|
671 ngx_event_pipe_remove_shadow_links(b->shadow);
|
|
0
|
672 }
|
|
|
673 }
|
|
|
674
|
|
|
675 return NGX_OK;
|
|
|
676 }
|
|
|
677
|
|
|
678
|
|
|
679 /* the copy input filter */
|
|
|
680
|
|
|
681 ngx_int_t ngx_event_pipe_copy_input_filter(ngx_event_pipe_t *p, ngx_buf_t *buf)
|
|
|
682 {
|
|
|
683 ngx_buf_t *b;
|
|
|
684 ngx_chain_t *cl;
|
|
|
685
|
|
|
686 if (buf->pos == buf->last) {
|
|
|
687 return NGX_OK;
|
|
|
688 }
|
|
|
689
|
|
|
690 if (p->free) {
|
|
56
|
691 cl = p->free;
|
|
|
692 b = cl->buf;
|
|
|
693 p->free = cl->next;
|
|
|
694 ngx_free_chain(p->pool, cl);
|
|
0
|
695
|
|
|
696 } else {
|
|
50
|
697 b = ngx_alloc_buf(p->pool);
|
|
|
698 if (b == NULL) {
|
|
0
|
699 return NGX_ERROR;
|
|
|
700 }
|
|
|
701 }
|
|
|
702
|
|
|
703 ngx_memcpy(b, buf, sizeof(ngx_buf_t));
|
|
|
704 b->shadow = buf;
|
|
|
705 b->tag = p->tag;
|
|
|
706 b->last_shadow = 1;
|
|
|
707 b->recycled = 1;
|
|
|
708 buf->shadow = b;
|
|
|
709
|
|
50
|
710 cl = ngx_alloc_chain_link(p->pool);
|
|
|
711 if (cl == NULL) {
|
|
32
|
712 return NGX_ERROR;
|
|
|
713 }
|
|
|
714
|
|
|
715 cl->buf = b;
|
|
|
716 cl->next = NULL;
|
|
0
|
717
|
|
28
|
718 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, p->log, 0, "input buf #%d", b->num);
|
|
0
|
719
|
|
50
|
720 if (p->in) {
|
|
|
721 *p->last_in = cl;
|
|
|
722 } else {
|
|
|
723 p->in = cl;
|
|
|
724 }
|
|
|
725 p->last_in = &cl->next;
|
|
0
|
726
|
|
|
727 return NGX_OK;
|
|
|
728 }
|
|
|
729
|
|
|
730
|
|
16
|
731 static ngx_inline void ngx_event_pipe_remove_shadow_links(ngx_buf_t *buf)
|
|
0
|
732 {
|
|
|
733 ngx_buf_t *b, *next;
|
|
|
734
|
|
2
|
735 b = buf->shadow;
|
|
|
736
|
|
|
737 if (b == NULL) {
|
|
0
|
738 return;
|
|
|
739 }
|
|
|
740
|
|
|
741 while (!b->last_shadow) {
|
|
|
742 next = b->shadow;
|
|
|
743
|
|
2
|
744 b->temporary = 0;
|
|
|
745 b->recycled = 0;
|
|
0
|
746
|
|
|
747 b->shadow = NULL;
|
|
|
748 b = next;
|
|
|
749 }
|
|
|
750
|
|
2
|
751 b->temporary = 0;
|
|
|
752 b->recycled = 0;
|
|
0
|
753 b->last_shadow = 0;
|
|
|
754
|
|
|
755 b->shadow = NULL;
|
|
|
756
|
|
|
757 buf->shadow = NULL;
|
|
|
758 }
|
|
|
759
|
|
|
760
|
|
16
|
761 static ngx_inline void ngx_event_pipe_free_shadow_raw_buf(ngx_chain_t **free,
|
|
0
|
762 ngx_buf_t *buf)
|
|
|
763 {
|
|
|
764 ngx_buf_t *s;
|
|
|
765 ngx_chain_t *cl, **ll;
|
|
|
766
|
|
|
767 if (buf->shadow == NULL) {
|
|
|
768 return;
|
|
|
769 }
|
|
|
770
|
|
|
771 for (s = buf->shadow; !s->last_shadow; s = s->shadow) { /* void */ }
|
|
|
772
|
|
|
773 ll = free;
|
|
|
774
|
|
|
775 for (cl = *free ; cl; cl = cl->next) {
|
|
|
776 if (cl->buf == s) {
|
|
|
777 *ll = cl->next;
|
|
|
778 break;
|
|
|
779 }
|
|
|
780
|
|
|
781 if (cl->buf->shadow) {
|
|
|
782 break;
|
|
|
783 }
|
|
|
784
|
|
|
785 ll = &cl->next;
|
|
|
786 }
|
|
|
787 }
|
|
|
788
|
|
|
789
|
|
32
|
790 ngx_int_t ngx_event_pipe_add_free_buf(ngx_event_pipe_t *p, ngx_buf_t *b)
|
|
0
|
791 {
|
|
32
|
792 ngx_chain_t *cl;
|
|
|
793
|
|
50
|
794 cl = ngx_alloc_chain_link(p->pool);
|
|
|
795 if (cl == NULL) {
|
|
32
|
796 return NGX_ERROR;
|
|
0
|
797 }
|
|
|
798
|
|
32
|
799 b->pos = b->start;
|
|
|
800 b->last = b->start;
|
|
|
801 b->shadow = NULL;
|
|
|
802
|
|
|
803 cl->buf = b;
|
|
|
804
|
|
|
805 if (p->free_raw_bufs == NULL) {
|
|
|
806 p->free_raw_bufs = cl;
|
|
|
807 cl->next = NULL;
|
|
|
808
|
|
|
809 return NGX_OK;
|
|
|
810 }
|
|
|
811
|
|
|
812 if (p->free_raw_bufs->buf->pos == p->free_raw_bufs->buf->last) {
|
|
0
|
813
|
|
32
|
814 /* add the free buf to the list start */
|
|
|
815
|
|
|
816 cl->next = p->free_raw_bufs;
|
|
|
817 p->free_raw_bufs = cl;
|
|
|
818
|
|
|
819 return NGX_OK;
|
|
0
|
820 }
|
|
32
|
821
|
|
|
822 /* the first free buf is partialy filled, thus add the free buf after it */
|
|
|
823
|
|
|
824 cl->next = p->free_raw_bufs->next;
|
|
|
825 p->free_raw_bufs->next = cl;
|
|
|
826
|
|
|
827 return NGX_OK;
|
|
0
|
828 }
|
|
|
829
|
|
|
830
|
|
|
831 static ngx_int_t ngx_event_pipe_drain_chains(ngx_event_pipe_t *p)
|
|
|
832 {
|
|
|
833 ngx_chain_t *cl, *tl;
|
|
|
834
|
|
|
835 for ( ;; ) {
|
|
|
836 if (p->busy) {
|
|
|
837 cl = p->busy;
|
|
|
838 p->busy = NULL;
|
|
|
839
|
|
|
840 } else if (p->out) {
|
|
|
841 cl = p->out;
|
|
|
842 p->out = NULL;
|
|
|
843
|
|
|
844 } else if (p->in) {
|
|
|
845 cl = p->in;
|
|
|
846 p->in = NULL;
|
|
|
847
|
|
|
848 } else {
|
|
|
849 return NGX_OK;
|
|
|
850 }
|
|
|
851
|
|
|
852 while (cl) {
|
|
|
853 if (cl->buf->last_shadow) {
|
|
32
|
854 if (ngx_event_pipe_add_free_buf(p, cl->buf->shadow) != NGX_OK) {
|
|
28
|
855 return NGX_ABORT;
|
|
|
856 }
|
|
|
857
|
|
0
|
858 cl->buf->last_shadow = 0;
|
|
|
859 }
|
|
|
860
|
|
|
861 cl->buf->shadow = NULL;
|
|
|
862 tl = cl->next;
|
|
|
863 cl->next = p->free;
|
|
|
864 p->free = cl;
|
|
|
865 cl = tl;
|
|
|
866 }
|
|
|
867 }
|
|
|
868 }
|
