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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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126
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23 ngx_int_t
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24 ngx_event_pipe(ngx_event_pipe_t *p, int do_write)
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0
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25 {
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26 u_int flags;
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27 ngx_event_t *rev, *wev;
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28
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29 for ( ;; ) {
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30 if (do_write) {
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32
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31 p->log->action = "sending to client";
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32
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0
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33 if (ngx_event_pipe_write_to_downstream(p) == NGX_ABORT) {
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34 return NGX_ABORT;
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35 }
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36 }
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37
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38 p->read = 0;
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39 p->upstream_blocked = 0;
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40
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32
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41 p->log->action = "reading upstream";
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42
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0
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43 if (ngx_event_pipe_read_upstream(p) == NGX_ABORT) {
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44 return NGX_ABORT;
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45 }
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46
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47 if (!p->read && !p->upstream_blocked) {
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48 break;
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49 }
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50
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51 do_write = 1;
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52 }
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53
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54 if (p->upstream->fd != -1) {
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55 rev = p->upstream->read;
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56
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57 flags = (rev->eof || rev->error) ? NGX_CLOSE_EVENT : 0;
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58
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59 if (ngx_handle_read_event(rev, flags) == NGX_ERROR) {
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60 return NGX_ABORT;
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61 }
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62
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162
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63 if (rev->active && !rev->ready) {
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0
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64 ngx_add_timer(rev, p->read_timeout);
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162
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65
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66 } else if (rev->timer_set) {
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67 ngx_del_timer(rev);
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0
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68 }
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69 }
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70
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58
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71 if (p->downstream->fd != -1 && p->downstream->data == p->output_ctx) {
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0
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72 wev = p->downstream->write;
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2
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73 if (ngx_handle_write_event(wev, p->send_lowat) == NGX_ERROR) {
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0
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74 return NGX_ABORT;
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75 }
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76
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162
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77 if (!wev->delayed) {
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78 if (wev->active && !wev->ready) {
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79 ngx_add_timer(wev, p->send_timeout);
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80
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81 } else if (wev->timer_set) {
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82 ngx_del_timer(wev);
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83 }
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0
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84 }
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85 }
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86
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87 return NGX_OK;
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88 }
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89
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90
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126
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91 static ngx_int_t
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92 ngx_event_pipe_read_upstream(ngx_event_pipe_t *p)
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0
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93 {
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10
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94 ssize_t n, size;
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95 ngx_int_t rc;
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0
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96 ngx_buf_t *b;
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56
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97 ngx_chain_t *chain, *cl, *ln;
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0
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98
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99 if (p->upstream_eof || p->upstream_error || p->upstream_done) {
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100 return NGX_OK;
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101 }
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102
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103 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, p->log, 0,
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104 "pipe read upstream: %d", p->upstream->read->ready);
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105
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106 for ( ;; ) {
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107
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108 if (p->upstream_eof || p->upstream_error || p->upstream_done) {
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109 break;
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110 }
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111
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112 if (p->preread_bufs == NULL && !p->upstream->read->ready) {
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113 break;
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114 }
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115
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116 if (p->preread_bufs) {
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117
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118 /* use the pre-read bufs if they exist */
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119
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120 chain = p->preread_bufs;
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121 p->preread_bufs = NULL;
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122 n = p->preread_size;
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123
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124 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, p->log, 0,
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10
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125 "pipe preread: %z", n);
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0
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126
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127 if (n) {
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128 p->read = 1;
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129 }
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130
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131 } else {
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132
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130
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133 #if (NGX_HAVE_KQUEUE)
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134
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0
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135 /*
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136 * kqueue notifies about the end of file or a pending error.
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137 * This test allows not to allocate a buf on these conditions
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126
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138 * and not to call c->recv_chain().
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0
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139 */
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140
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141 if (p->upstream->read->available == 0
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136
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142 && p->upstream->read->pending_eof)
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0
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143 {
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144 p->upstream->read->ready = 0;
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145 p->upstream->read->eof = 0;
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146 p->upstream_eof = 1;
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147 p->read = 1;
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148
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149 if (p->upstream->read->kq_errno) {
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150 p->upstream->read->error = 1;
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151 p->upstream_error = 1;
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152 p->upstream_eof = 0;
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153
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154 ngx_log_error(NGX_LOG_ERR, p->log,
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155 p->upstream->read->kq_errno,
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130
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156 "kevent() reported that upstream "
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157 "closed connection");
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0
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158 }
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159
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160 break;
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161 }
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130
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162 #endif
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0
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163
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164 if (p->free_raw_bufs) {
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165
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166 /* use the free bufs if they exist */
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167
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168 chain = p->free_raw_bufs;
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169 if (p->single_buf) {
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170 p->free_raw_bufs = p->free_raw_bufs->next;
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171 chain->next = NULL;
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172 } else {
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173 p->free_raw_bufs = NULL;
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174 }
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175
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176 } else if (p->allocated < p->bufs.num) {
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177
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178 /* allocate a new buf if it's still allowed */
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179
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50
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180 b = ngx_create_temp_buf(p->pool, p->bufs.size);
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181 if (b == NULL) {
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0
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182 return NGX_ABORT;
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183 }
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184
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185 p->allocated++;
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186
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50
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187 chain = ngx_alloc_chain_link(p->pool);
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188 if (chain == NULL) {
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32
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189 return NGX_ABORT;
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190 }
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191
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192 chain->buf = b;
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193 chain->next = NULL;
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0
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194
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58
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195 } else if (!p->cachable
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196 && p->downstream->data == p->output_ctx
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76
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197 && p->downstream->write->ready
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198 && !p->downstream->write->delayed)
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58
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199 {
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0
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200 /*
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201 * if the bufs are not needed to be saved in a cache and
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202 * a downstream is ready then write the bufs to a downstream
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203 */
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204
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205 p->upstream_blocked = 1;
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206
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207 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, p->log, 0,
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208 "pipe downstream ready");
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209
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210 break;
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211
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212 } else if (p->cachable
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213 || p->temp_file->offset < p->max_temp_file_size)
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214 {
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215
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216 /*
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32
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217 * if it is allowed, then save some bufs from r->in
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0
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218 * to a temporary file, and add them to a r->out chain
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219 */
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220
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221 rc = ngx_event_pipe_write_chain_to_temp_file(p);
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222
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223 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, p->log, 0,
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10
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224 "pipe temp offset: %O", p->temp_file->offset);
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0
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225
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70
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226 if (rc == NGX_BUSY) {
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227 break;
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228 }
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229
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0
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230 if (rc == NGX_AGAIN) {
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231 if (ngx_event_flags & NGX_USE_LEVEL_EVENT
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232 && p->upstream->read->active
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233 && p->upstream->read->ready)
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234 {
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235 if (ngx_del_event(p->upstream->read, NGX_READ_EVENT, 0)
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126
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236 == NGX_ERROR)
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0
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237 {
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238 return NGX_ABORT;
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239 }
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240 }
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241 }
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242
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243 if (rc != NGX_OK) {
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244 return rc;
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245 }
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246
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247 chain = p->free_raw_bufs;
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248 if (p->single_buf) {
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249 p->free_raw_bufs = p->free_raw_bufs->next;
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250 chain->next = NULL;
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251 } else {
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252 p->free_raw_bufs = NULL;
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253 }
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254
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255 } else {
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256
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32
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257 /* there are no bufs to read in */
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0
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258
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259 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, p->log, 0,
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260 "no pipe bufs to read in");
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126
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261
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0
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262 break;
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263 }
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264
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126
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265 n = p->upstream->recv_chain(p->upstream, chain);
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0
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266
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267 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, p->log, 0,
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10
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268 "pipe recv chain: %z", n);
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0
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269
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270 if (p->free_raw_bufs) {
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271 chain->next = p->free_raw_bufs;
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272 }
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273 p->free_raw_bufs = chain;
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274
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275 if (n == NGX_ERROR) {
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276 p->upstream_error = 1;
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277 return NGX_ERROR;
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278 }
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279
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280 if (n == NGX_AGAIN) {
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281 if (p->single_buf) {
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282 ngx_event_pipe_remove_shadow_links(chain->buf);
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283 }
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284
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285 break;
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286 }
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287
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288 p->read = 1;
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289
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290 if (n == 0) {
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291 p->upstream_eof = 1;
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292 break;
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293 }
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294 }
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295
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296 p->read_length += n;
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297 cl = chain;
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258
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298 p->free_raw_bufs = NULL;
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0
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299
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300 while (cl && n > 0) {
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301
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302 ngx_event_pipe_remove_shadow_links(cl->buf);
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303
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304 size = cl->buf->end - cl->buf->last;
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305
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306 if (n >= size) {
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307 cl->buf->last = cl->buf->end;
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308
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309 /* STUB */ cl->buf->num = p->num++;
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310
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311 if (p->input_filter(p, cl->buf) == NGX_ERROR) {
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312 return NGX_ABORT;
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313 }
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314
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315 n -= size;
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56
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316 ln = cl;
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0
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317 cl = cl->next;
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56
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318 ngx_free_chain(p->pool, ln);
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0
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319
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320 } else {
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321 cl->buf->last += n;
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322 n = 0;
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323 }
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324 }
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325
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258
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326 if (cl) {
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327 for (ln = cl; ln->next; ln = ln->next) { /* void */ }
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328
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329 ln->next = p->free_raw_bufs;
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330 p->free_raw_bufs = cl;
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331 }
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0
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332 }
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333
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334 #if (NGX_DEBUG)
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335
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2
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336 for (cl = p->busy; cl; cl = cl->next) {
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32
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337 ngx_log_debug8(NGX_LOG_DEBUG_EVENT, p->log, 0,
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338 "pipe buf busy s:%d t:%d f:%d "
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339 "%p, pos %p, size: %z "
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340 "file: %O, size: %z",
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341 (cl->buf->shadow ? 1 : 0),
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342 cl->buf->temporary, cl->buf->in_file,
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0
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343 cl->buf->start, cl->buf->pos,
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32
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344 cl->buf->last - cl->buf->pos,
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345 cl->buf->file_pos,
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346 cl->buf->file_last - cl->buf->file_pos);
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0
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347 }
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348
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2
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349 for (cl = p->out; cl; cl = cl->next) {
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32
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350 ngx_log_debug8(NGX_LOG_DEBUG_EVENT, p->log, 0,
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351 "pipe buf out s:%d t:%d f:%d "
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352 "%p, pos %p, size: %z "
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353 "file: %O, size: %z",
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354 (cl->buf->shadow ? 1 : 0),
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355 cl->buf->temporary, cl->buf->in_file,
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356 cl->buf->start, cl->buf->pos,
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357 cl->buf->last - cl->buf->pos,
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358 cl->buf->file_pos,
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359 cl->buf->file_last - cl->buf->file_pos);
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2
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360 }
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361
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362 for (cl = p->in; cl; cl = cl->next) {
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32
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363 ngx_log_debug8(NGX_LOG_DEBUG_EVENT, p->log, 0,
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364 "pipe buf in s:%d t:%d f:%d "
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365 "%p, pos %p, size: %z "
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366 "file: %O, size: %z",
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367 (cl->buf->shadow ? 1 : 0),
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368 cl->buf->temporary, cl->buf->in_file,
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0
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369 cl->buf->start, cl->buf->pos,
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32
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370 cl->buf->last - cl->buf->pos,
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371 cl->buf->file_pos,
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372 cl->buf->file_last - cl->buf->file_pos);
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0
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373 }
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374
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375 for (cl = p->free_raw_bufs; cl; cl = cl->next) {
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32
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376 ngx_log_debug8(NGX_LOG_DEBUG_EVENT, p->log, 0,
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377 "pipe buf free s:%d t:%d f:%d "
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378 "%p, pos %p, size: %z "
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379 "file: %O, size: %z",
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380 (cl->buf->shadow ? 1 : 0),
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381 cl->buf->temporary, cl->buf->in_file,
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382 cl->buf->start, cl->buf->pos,
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383 cl->buf->last - cl->buf->pos,
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384 cl->buf->file_pos,
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385 cl->buf->file_last - cl->buf->file_pos);
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0
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386 }
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387
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388 #endif
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389
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|
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390 if ((p->upstream_eof || p->upstream_error) && p->free_raw_bufs) {
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391
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392 /* STUB */ p->free_raw_bufs->buf->num = p->num++;
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393
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394 if (p->input_filter(p, p->free_raw_bufs->buf) == NGX_ERROR) {
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395 return NGX_ABORT;
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396 }
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397
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398 p->free_raw_bufs = p->free_raw_bufs->next;
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399
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400 if (p->free_bufs) {
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401 for (cl = p->free_raw_bufs; cl; cl = cl->next) {
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2
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402 if (cl->buf->shadow == NULL) {
|
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126
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403 ngx_pfree(p->pool, cl->buf->start);
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2
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404 }
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0
|
405 }
|
|
|
406 }
|
|
|
407 }
|
|
|
408
|
|
|
409 if (p->cachable && p->in) {
|
|
|
410 if (ngx_event_pipe_write_chain_to_temp_file(p) == NGX_ABORT) {
|
|
|
411 return NGX_ABORT;
|
|
|
412 }
|
|
|
413 }
|
|
|
414
|
|
|
415 return NGX_OK;
|
|
|
416 }
|
|
|
417
|
|
|
418
|
|
126
|
419 static ngx_int_t
|
|
|
420 ngx_event_pipe_write_to_downstream(ngx_event_pipe_t *p)
|
|
0
|
421 {
|
|
132
|
422 size_t bsize;
|
|
276
|
423 ngx_uint_t flush, prev_last_shadow;
|
|
132
|
424 ngx_chain_t *out, **ll, *cl;
|
|
|
425 ngx_connection_t *downstream;
|
|
|
426
|
|
|
427 downstream = p->downstream;
|
|
0
|
428
|
|
|
429 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, p->log, 0,
|
|
132
|
430 "pipe write downstream: %d", downstream->write->ready);
|
|
0
|
431
|
|
|
432 for ( ;; ) {
|
|
|
433 if (p->downstream_error) {
|
|
|
434 return ngx_event_pipe_drain_chains(p);
|
|
|
435 }
|
|
|
436
|
|
|
437 if (p->upstream_eof || p->upstream_error || p->upstream_done) {
|
|
|
438
|
|
|
439 /* pass the p->out and p->in chains to the output filter */
|
|
|
440
|
|
58
|
441 for (cl = p->busy; cl; cl = cl->next) {
|
|
|
442 cl->buf->recycled = 0;
|
|
|
443 }
|
|
|
444
|
|
0
|
445 if (p->out) {
|
|
|
446 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, p->log, 0,
|
|
|
447 "pipe write downstream flush out");
|
|
|
448
|
|
58
|
449 for (cl = p->out; cl; cl = cl->next) {
|
|
|
450 cl->buf->recycled = 0;
|
|
|
451 }
|
|
|
452
|
|
0
|
453 if (p->output_filter(p->output_ctx, p->out) == NGX_ERROR) {
|
|
|
454 p->downstream_error = 1;
|
|
|
455 return ngx_event_pipe_drain_chains(p);
|
|
|
456 }
|
|
|
457
|
|
|
458 p->out = NULL;
|
|
|
459 }
|
|
|
460
|
|
|
461 if (p->in) {
|
|
|
462 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, p->log, 0,
|
|
|
463 "pipe write downstream flush in");
|
|
|
464
|
|
58
|
465 for (cl = p->in; cl; cl = cl->next) {
|
|
|
466 cl->buf->recycled = 0;
|
|
|
467 }
|
|
|
468
|
|
0
|
469 if (p->output_filter(p->output_ctx, p->in) == NGX_ERROR) {
|
|
132
|
470
|
|
|
471 if (downstream->destroyed) {
|
|
|
472 return NGX_ABORT;
|
|
|
473 }
|
|
|
474
|
|
0
|
475 p->downstream_error = 1;
|
|
|
476 return ngx_event_pipe_drain_chains(p);
|
|
|
477 }
|
|
|
478
|
|
|
479 p->in = NULL;
|
|
|
480 }
|
|
|
481
|
|
|
482 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, p->log, 0,
|
|
|
483 "pipe write downstream done");
|
|
|
484
|
|
|
485 /* TODO: free unused bufs */
|
|
|
486
|
|
|
487 p->downstream_done = 1;
|
|
|
488 break;
|
|
|
489 }
|
|
|
490
|
|
132
|
491 if (downstream->data != p->output_ctx
|
|
|
492 || !downstream->write->ready
|
|
|
493 || downstream->write->delayed)
|
|
58
|
494 {
|
|
0
|
495 break;
|
|
|
496 }
|
|
|
497
|
|
28
|
498 /* bsize is the size of the busy recycled bufs */
|
|
0
|
499
|
|
|
500 bsize = 0;
|
|
|
501
|
|
|
502 for (cl = p->busy; cl; cl = cl->next) {
|
|
28
|
503 if (cl->buf->recycled) {
|
|
|
504 bsize += cl->buf->end - cl->buf->start;
|
|
|
505 }
|
|
0
|
506 }
|
|
|
507
|
|
|
508 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, p->log, 0,
|
|
28
|
509 "pipe write busy: %uz", bsize);
|
|
0
|
510
|
|
|
511 out = NULL;
|
|
|
512 ll = NULL;
|
|
|
513 flush = 0;
|
|
276
|
514 prev_last_shadow = 1;
|
|
0
|
515
|
|
|
516 for ( ;; ) {
|
|
|
517 if (p->out) {
|
|
|
518 cl = p->out;
|
|
|
519
|
|
28
|
520 if (cl->buf->recycled
|
|
|
521 && bsize + cl->buf->last - cl->buf->pos > p->busy_size)
|
|
|
522 {
|
|
0
|
523 flush = 1;
|
|
|
524 break;
|
|
|
525 }
|
|
|
526
|
|
|
527 p->out = p->out->next;
|
|
28
|
528
|
|
|
529 ngx_event_pipe_free_shadow_raw_buf(&p->free_raw_bufs, cl->buf);
|
|
0
|
530
|
|
|
531 } else if (!p->cachable && p->in) {
|
|
|
532 cl = p->in;
|
|
|
533
|
|
274
|
534 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, p->log, 0,
|
|
|
535 "pipe write buf ls:%d %p %z",
|
|
|
536 cl->buf->last_shadow,
|
|
|
537 cl->buf->pos,
|
|
|
538 cl->buf->last - cl->buf->pos);
|
|
|
539
|
|
28
|
540 if (cl->buf->recycled
|
|
256
|
541 && cl->buf->last_shadow
|
|
28
|
542 && bsize + cl->buf->last - cl->buf->pos > p->busy_size)
|
|
|
543 {
|
|
276
|
544 if (!prev_last_shadow) {
|
|
|
545 p->in = p->in->next;
|
|
|
546
|
|
|
547 cl->next = NULL;
|
|
|
548
|
|
|
549 if (out) {
|
|
|
550 *ll = cl;
|
|
|
551 } else {
|
|
|
552 out = cl;
|
|
|
553 }
|
|
|
554 }
|
|
|
555
|
|
0
|
556 flush = 1;
|
|
|
557 break;
|
|
|
558 }
|
|
|
559
|
|
276
|
560 prev_last_shadow = cl->buf->last_shadow;
|
|
|
561
|
|
0
|
562 p->in = p->in->next;
|
|
|
563
|
|
|
564 } else {
|
|
|
565 break;
|
|
|
566 }
|
|
|
567
|
|
28
|
568 if (cl->buf->recycled) {
|
|
|
569 bsize += cl->buf->last - cl->buf->pos;
|
|
|
570 }
|
|
|
571
|
|
0
|
572 cl->next = NULL;
|
|
50
|
573
|
|
|
574 if (out) {
|
|
|
575 *ll = cl;
|
|
|
576 } else {
|
|
|
577 out = cl;
|
|
|
578 }
|
|
|
579 ll = &cl->next;
|
|
0
|
580 }
|
|
|
581
|
|
|
582 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, p->log, 0,
|
|
10
|
583 "pipe write: out:%p, f:%d", out, flush);
|
|
0
|
584
|
|
|
585 if (out == NULL && !flush) {
|
|
|
586 break;
|
|
|
587 }
|
|
|
588
|
|
|
589 if (p->output_filter(p->output_ctx, out) == NGX_ERROR) {
|
|
|
590 p->downstream_error = 1;
|
|
|
591 return ngx_event_pipe_drain_chains(p);
|
|
|
592 }
|
|
|
593
|
|
|
594 ngx_chain_update_chains(&p->free, &p->busy, &out, p->tag);
|
|
|
595
|
|
|
596 for (cl = p->free; cl; cl = cl->next) {
|
|
|
597
|
|
|
598 if (cl->buf->temp_file) {
|
|
|
599 if (p->cachable || !p->cyclic_temp_file) {
|
|
|
600 continue;
|
|
|
601 }
|
|
|
602
|
|
|
603 /* reset p->temp_offset if all bufs had been sent */
|
|
|
604
|
|
|
605 if (cl->buf->file_last == p->temp_file->offset) {
|
|
|
606 p->temp_file->offset = 0;
|
|
|
607 }
|
|
|
608 }
|
|
|
609
|
|
|
610 /* TODO: free buf if p->free_bufs && upstream done */
|
|
|
611
|
|
|
612 /* add the free shadow raw buf to p->free_raw_bufs */
|
|
|
613
|
|
|
614 if (cl->buf->last_shadow) {
|
|
32
|
615 if (ngx_event_pipe_add_free_buf(p, cl->buf->shadow) != NGX_OK) {
|
|
|
616 return NGX_ABORT;
|
|
|
617 }
|
|
0
|
618
|
|
|
619 cl->buf->last_shadow = 0;
|
|
|
620 }
|
|
|
621
|
|
|
622 cl->buf->shadow = NULL;
|
|
|
623 }
|
|
|
624 }
|
|
|
625
|
|
|
626 return NGX_OK;
|
|
|
627 }
|
|
|
628
|
|
|
629
|
|
126
|
630 static ngx_int_t
|
|
|
631 ngx_event_pipe_write_chain_to_temp_file(ngx_event_pipe_t *p)
|
|
0
|
632 {
|
|
|
633 ssize_t size, bsize;
|
|
|
634 ngx_buf_t *b;
|
|
|
635 ngx_chain_t *cl, *tl, *next, *out, **ll, **last_free, fl;
|
|
|
636
|
|
|
637 if (p->buf_to_file) {
|
|
|
638 fl.buf = p->buf_to_file;
|
|
|
639 fl.next = p->in;
|
|
|
640 out = &fl;
|
|
|
641
|
|
|
642 } else {
|
|
|
643 out = p->in;
|
|
|
644 }
|
|
|
645
|
|
|
646 if (!p->cachable) {
|
|
|
647
|
|
|
648 size = 0;
|
|
|
649 cl = out;
|
|
|
650 ll = NULL;
|
|
|
651
|
|
|
652 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, p->log, 0,
|
|
10
|
653 "pipe offset: %O", p->temp_file->offset);
|
|
0
|
654
|
|
|
655 do {
|
|
|
656 bsize = cl->buf->last - cl->buf->pos;
|
|
|
657
|
|
|
658 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, p->log, 0,
|
|
10
|
659 "pipe buf %p, pos %p, size: %z",
|
|
0
|
660 cl->buf->start, cl->buf->pos, bsize);
|
|
|
661
|
|
|
662 if ((size + bsize > p->temp_file_write_size)
|
|
|
663 || (p->temp_file->offset + size + bsize > p->max_temp_file_size))
|
|
|
664 {
|
|
|
665 break;
|
|
|
666 }
|
|
|
667
|
|
|
668 size += bsize;
|
|
|
669 ll = &cl->next;
|
|
|
670 cl = cl->next;
|
|
|
671
|
|
|
672 } while (cl);
|
|
|
673
|
|
10
|
674 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, p->log, 0, "size: %z", size);
|
|
0
|
675
|
|
70
|
676 if (ll == NULL) {
|
|
|
677 return NGX_BUSY;
|
|
|
678 }
|
|
|
679
|
|
0
|
680 if (cl) {
|
|
|
681 p->in = cl;
|
|
|
682 *ll = NULL;
|
|
|
683
|
|
|
684 } else {
|
|
|
685 p->in = NULL;
|
|
|
686 p->last_in = &p->in;
|
|
|
687 }
|
|
|
688
|
|
|
689 } else {
|
|
|
690 p->in = NULL;
|
|
|
691 p->last_in = &p->in;
|
|
|
692 }
|
|
|
693
|
|
|
694 if (ngx_write_chain_to_temp_file(p->temp_file, out) == NGX_ERROR) {
|
|
|
695 return NGX_ABORT;
|
|
|
696 }
|
|
|
697
|
|
|
698 for (last_free = &p->free_raw_bufs;
|
|
|
699 *last_free != NULL;
|
|
|
700 last_free = &(*last_free)->next)
|
|
|
701 {
|
|
|
702 /* void */
|
|
|
703 }
|
|
|
704
|
|
|
705 if (p->buf_to_file) {
|
|
|
706 p->temp_file->offset = p->buf_to_file->last - p->buf_to_file->pos;
|
|
|
707 p->buf_to_file = NULL;
|
|
|
708 out = out->next;
|
|
|
709 }
|
|
|
710
|
|
|
711 for (cl = out; cl; cl = next) {
|
|
|
712 next = cl->next;
|
|
|
713 cl->next = NULL;
|
|
|
714
|
|
|
715 b = cl->buf;
|
|
|
716 b->file = &p->temp_file->file;
|
|
|
717 b->file_pos = p->temp_file->offset;
|
|
|
718 p->temp_file->offset += b->last - b->pos;
|
|
|
719 b->file_last = p->temp_file->offset;
|
|
|
720
|
|
|
721 b->in_file = 1;
|
|
|
722 b->temp_file = 1;
|
|
|
723
|
|
50
|
724 if (p->out) {
|
|
|
725 *p->last_out = cl;
|
|
|
726 } else {
|
|
|
727 p->out = cl;
|
|
|
728 }
|
|
|
729 p->last_out = &cl->next;
|
|
0
|
730
|
|
|
731 if (b->last_shadow) {
|
|
32
|
732
|
|
50
|
733 tl = ngx_alloc_chain_link(p->pool);
|
|
|
734 if (tl == NULL) {
|
|
32
|
735 return NGX_ABORT;
|
|
|
736 }
|
|
|
737
|
|
|
738 tl->buf = b->shadow;
|
|
|
739 tl->next = NULL;
|
|
|
740
|
|
|
741 *last_free = tl;
|
|
|
742 last_free = &tl->next;
|
|
|
743
|
|
2
|
744 b->shadow->pos = b->shadow->start;
|
|
|
745 b->shadow->last = b->shadow->start;
|
|
|
746
|
|
32
|
747 ngx_event_pipe_remove_shadow_links(b->shadow);
|
|
0
|
748 }
|
|
|
749 }
|
|
|
750
|
|
|
751 return NGX_OK;
|
|
|
752 }
|
|
|
753
|
|
|
754
|
|
|
755 /* the copy input filter */
|
|
|
756
|
|
126
|
757 ngx_int_t
|
|
|
758 ngx_event_pipe_copy_input_filter(ngx_event_pipe_t *p, ngx_buf_t *buf)
|
|
0
|
759 {
|
|
|
760 ngx_buf_t *b;
|
|
|
761 ngx_chain_t *cl;
|
|
|
762
|
|
|
763 if (buf->pos == buf->last) {
|
|
|
764 return NGX_OK;
|
|
|
765 }
|
|
|
766
|
|
|
767 if (p->free) {
|
|
56
|
768 cl = p->free;
|
|
|
769 b = cl->buf;
|
|
|
770 p->free = cl->next;
|
|
|
771 ngx_free_chain(p->pool, cl);
|
|
0
|
772
|
|
|
773 } else {
|
|
50
|
774 b = ngx_alloc_buf(p->pool);
|
|
|
775 if (b == NULL) {
|
|
0
|
776 return NGX_ERROR;
|
|
|
777 }
|
|
|
778 }
|
|
|
779
|
|
|
780 ngx_memcpy(b, buf, sizeof(ngx_buf_t));
|
|
|
781 b->shadow = buf;
|
|
|
782 b->tag = p->tag;
|
|
|
783 b->last_shadow = 1;
|
|
|
784 b->recycled = 1;
|
|
|
785 buf->shadow = b;
|
|
|
786
|
|
50
|
787 cl = ngx_alloc_chain_link(p->pool);
|
|
|
788 if (cl == NULL) {
|
|
32
|
789 return NGX_ERROR;
|
|
|
790 }
|
|
|
791
|
|
|
792 cl->buf = b;
|
|
|
793 cl->next = NULL;
|
|
0
|
794
|
|
28
|
795 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, p->log, 0, "input buf #%d", b->num);
|
|
0
|
796
|
|
50
|
797 if (p->in) {
|
|
|
798 *p->last_in = cl;
|
|
|
799 } else {
|
|
|
800 p->in = cl;
|
|
|
801 }
|
|
|
802 p->last_in = &cl->next;
|
|
0
|
803
|
|
|
804 return NGX_OK;
|
|
|
805 }
|
|
|
806
|
|
|
807
|
|
126
|
808 static ngx_inline void
|
|
|
809 ngx_event_pipe_remove_shadow_links(ngx_buf_t *buf)
|
|
0
|
810 {
|
|
|
811 ngx_buf_t *b, *next;
|
|
|
812
|
|
2
|
813 b = buf->shadow;
|
|
|
814
|
|
|
815 if (b == NULL) {
|
|
0
|
816 return;
|
|
|
817 }
|
|
|
818
|
|
|
819 while (!b->last_shadow) {
|
|
|
820 next = b->shadow;
|
|
|
821
|
|
2
|
822 b->temporary = 0;
|
|
|
823 b->recycled = 0;
|
|
0
|
824
|
|
|
825 b->shadow = NULL;
|
|
|
826 b = next;
|
|
|
827 }
|
|
|
828
|
|
2
|
829 b->temporary = 0;
|
|
|
830 b->recycled = 0;
|
|
0
|
831 b->last_shadow = 0;
|
|
|
832
|
|
|
833 b->shadow = NULL;
|
|
|
834
|
|
|
835 buf->shadow = NULL;
|
|
|
836 }
|
|
|
837
|
|
|
838
|
|
126
|
839 static ngx_inline void
|
|
|
840 ngx_event_pipe_free_shadow_raw_buf(ngx_chain_t **free, ngx_buf_t *buf)
|
|
0
|
841 {
|
|
|
842 ngx_buf_t *s;
|
|
|
843 ngx_chain_t *cl, **ll;
|
|
|
844
|
|
|
845 if (buf->shadow == NULL) {
|
|
|
846 return;
|
|
|
847 }
|
|
|
848
|
|
|
849 for (s = buf->shadow; !s->last_shadow; s = s->shadow) { /* void */ }
|
|
|
850
|
|
|
851 ll = free;
|
|
|
852
|
|
|
853 for (cl = *free ; cl; cl = cl->next) {
|
|
|
854 if (cl->buf == s) {
|
|
|
855 *ll = cl->next;
|
|
|
856 break;
|
|
|
857 }
|
|
|
858
|
|
|
859 if (cl->buf->shadow) {
|
|
|
860 break;
|
|
|
861 }
|
|
|
862
|
|
|
863 ll = &cl->next;
|
|
|
864 }
|
|
|
865 }
|
|
|
866
|
|
|
867
|
|
126
|
868 ngx_int_t
|
|
|
869 ngx_event_pipe_add_free_buf(ngx_event_pipe_t *p, ngx_buf_t *b)
|
|
0
|
870 {
|
|
32
|
871 ngx_chain_t *cl;
|
|
|
872
|
|
50
|
873 cl = ngx_alloc_chain_link(p->pool);
|
|
|
874 if (cl == NULL) {
|
|
32
|
875 return NGX_ERROR;
|
|
0
|
876 }
|
|
|
877
|
|
32
|
878 b->pos = b->start;
|
|
|
879 b->last = b->start;
|
|
|
880 b->shadow = NULL;
|
|
|
881
|
|
|
882 cl->buf = b;
|
|
|
883
|
|
|
884 if (p->free_raw_bufs == NULL) {
|
|
|
885 p->free_raw_bufs = cl;
|
|
|
886 cl->next = NULL;
|
|
|
887
|
|
|
888 return NGX_OK;
|
|
|
889 }
|
|
|
890
|
|
|
891 if (p->free_raw_bufs->buf->pos == p->free_raw_bufs->buf->last) {
|
|
0
|
892
|
|
32
|
893 /* add the free buf to the list start */
|
|
|
894
|
|
|
895 cl->next = p->free_raw_bufs;
|
|
|
896 p->free_raw_bufs = cl;
|
|
|
897
|
|
|
898 return NGX_OK;
|
|
0
|
899 }
|
|
32
|
900
|
|
|
901 /* the first free buf is partialy filled, thus add the free buf after it */
|
|
|
902
|
|
|
903 cl->next = p->free_raw_bufs->next;
|
|
|
904 p->free_raw_bufs->next = cl;
|
|
|
905
|
|
|
906 return NGX_OK;
|
|
0
|
907 }
|
|
|
908
|
|
|
909
|
|
126
|
910 static ngx_int_t
|
|
|
911 ngx_event_pipe_drain_chains(ngx_event_pipe_t *p)
|
|
0
|
912 {
|
|
|
913 ngx_chain_t *cl, *tl;
|
|
|
914
|
|
|
915 for ( ;; ) {
|
|
|
916 if (p->busy) {
|
|
|
917 cl = p->busy;
|
|
|
918 p->busy = NULL;
|
|
|
919
|
|
|
920 } else if (p->out) {
|
|
|
921 cl = p->out;
|
|
|
922 p->out = NULL;
|
|
|
923
|
|
|
924 } else if (p->in) {
|
|
|
925 cl = p->in;
|
|
|
926 p->in = NULL;
|
|
|
927
|
|
|
928 } else {
|
|
|
929 return NGX_OK;
|
|
|
930 }
|
|
|
931
|
|
|
932 while (cl) {
|
|
|
933 if (cl->buf->last_shadow) {
|
|
32
|
934 if (ngx_event_pipe_add_free_buf(p, cl->buf->shadow) != NGX_OK) {
|
|
28
|
935 return NGX_ABORT;
|
|
|
936 }
|
|
|
937
|
|
0
|
938 cl->buf->last_shadow = 0;
|
|
|
939 }
|
|
|
940
|
|
|
941 cl->buf->shadow = NULL;
|
|
|
942 tl = cl->next;
|
|
|
943 cl->next = p->free;
|
|
|
944 p->free = cl;
|
|
|
945 cl = tl;
|
|
|
946 }
|
|
|
947 }
|
|
|
948 }
|
