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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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660
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4 * Copyright (C) Nginx, Inc.
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0
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5 */
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6
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7
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8 #include <ngx_config.h>
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9 #include <ngx_core.h>
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10 #include <ngx_event.h>
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11 #include <ngx_event_pipe.h>
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12
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13
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14 static ngx_int_t ngx_event_pipe_read_upstream(ngx_event_pipe_t *p);
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15 static ngx_int_t ngx_event_pipe_write_to_downstream(ngx_event_pipe_t *p);
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16
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17 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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18 static ngx_inline void ngx_event_pipe_remove_shadow_links(ngx_buf_t *buf);
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0
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19 static ngx_int_t ngx_event_pipe_drain_chains(ngx_event_pipe_t *p);
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20
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21
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126
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22 ngx_int_t
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344
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23 ngx_event_pipe(ngx_event_pipe_t *p, ngx_int_t do_write)
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0
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24 {
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25 u_int flags;
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518
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26 ngx_int_t rc;
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0
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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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518
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33 rc = ngx_event_pipe_write_to_downstream(p);
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34
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35 if (rc == NGX_ABORT) {
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0
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36 return NGX_ABORT;
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37 }
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518
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38
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39 if (rc == NGX_BUSY) {
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40 return NGX_OK;
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41 }
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0
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42 }
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43
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44 p->read = 0;
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45 p->upstream_blocked = 0;
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46
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32
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47 p->log->action = "reading upstream";
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48
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0
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49 if (ngx_event_pipe_read_upstream(p) == NGX_ABORT) {
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50 return NGX_ABORT;
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51 }
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52
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53 if (!p->read && !p->upstream_blocked) {
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54 break;
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55 }
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56
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57 do_write = 1;
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58 }
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59
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60 if (p->upstream->fd != -1) {
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61 rev = p->upstream->read;
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62
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63 flags = (rev->eof || rev->error) ? NGX_CLOSE_EVENT : 0;
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64
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430
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65 if (ngx_handle_read_event(rev, flags) != NGX_OK) {
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0
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66 return NGX_ABORT;
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67 }
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68
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162
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69 if (rev->active && !rev->ready) {
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0
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70 ngx_add_timer(rev, p->read_timeout);
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162
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71
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72 } else if (rev->timer_set) {
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73 ngx_del_timer(rev);
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0
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74 }
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75 }
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76
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58
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77 if (p->downstream->fd != -1 && p->downstream->data == p->output_ctx) {
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0
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78 wev = p->downstream->write;
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430
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79 if (ngx_handle_write_event(wev, p->send_lowat) != NGX_OK) {
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0
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80 return NGX_ABORT;
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81 }
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82
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162
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83 if (!wev->delayed) {
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84 if (wev->active && !wev->ready) {
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85 ngx_add_timer(wev, p->send_timeout);
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86
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87 } else if (wev->timer_set) {
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88 ngx_del_timer(wev);
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89 }
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0
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90 }
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91 }
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92
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93 return NGX_OK;
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94 }
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95
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96
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126
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97 static ngx_int_t
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98 ngx_event_pipe_read_upstream(ngx_event_pipe_t *p)
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0
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99 {
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10
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100 ssize_t n, size;
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101 ngx_int_t rc;
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0
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102 ngx_buf_t *b;
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56
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103 ngx_chain_t *chain, *cl, *ln;
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0
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104
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105 if (p->upstream_eof || p->upstream_error || p->upstream_done) {
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106 return NGX_OK;
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107 }
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108
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109 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, p->log, 0,
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110 "pipe read upstream: %d", p->upstream->read->ready);
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111
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112 for ( ;; ) {
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113
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114 if (p->upstream_eof || p->upstream_error || p->upstream_done) {
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115 break;
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116 }
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117
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118 if (p->preread_bufs == NULL && !p->upstream->read->ready) {
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119 break;
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120 }
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121
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122 if (p->preread_bufs) {
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123
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124 /* use the pre-read bufs if they exist */
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125
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126 chain = p->preread_bufs;
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127 p->preread_bufs = NULL;
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128 n = p->preread_size;
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129
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130 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, p->log, 0,
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10
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131 "pipe preread: %z", n);
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0
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132
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133 if (n) {
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134 p->read = 1;
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135 }
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136
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137 } else {
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138
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130
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139 #if (NGX_HAVE_KQUEUE)
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140
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0
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141 /*
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142 * kqueue notifies about the end of file or a pending error.
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143 * This test allows not to allocate a buf on these conditions
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126
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144 * and not to call c->recv_chain().
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0
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145 */
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146
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147 if (p->upstream->read->available == 0
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136
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148 && p->upstream->read->pending_eof)
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0
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149 {
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150 p->upstream->read->ready = 0;
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636
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151 p->upstream->read->eof = 1;
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0
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152 p->upstream_eof = 1;
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153 p->read = 1;
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154
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155 if (p->upstream->read->kq_errno) {
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156 p->upstream->read->error = 1;
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157 p->upstream_error = 1;
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158 p->upstream_eof = 0;
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159
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160 ngx_log_error(NGX_LOG_ERR, p->log,
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161 p->upstream->read->kq_errno,
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130
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162 "kevent() reported that upstream "
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163 "closed connection");
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0
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164 }
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165
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166 break;
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167 }
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130
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168 #endif
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0
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169
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170 if (p->free_raw_bufs) {
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171
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172 /* use the free bufs if they exist */
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173
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174 chain = p->free_raw_bufs;
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175 if (p->single_buf) {
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176 p->free_raw_bufs = p->free_raw_bufs->next;
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177 chain->next = NULL;
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178 } else {
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179 p->free_raw_bufs = NULL;
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180 }
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181
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182 } else if (p->allocated < p->bufs.num) {
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183
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184 /* allocate a new buf if it's still allowed */
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185
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50
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186 b = ngx_create_temp_buf(p->pool, p->bufs.size);
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187 if (b == NULL) {
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0
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188 return NGX_ABORT;
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189 }
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190
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191 p->allocated++;
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192
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50
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193 chain = ngx_alloc_chain_link(p->pool);
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194 if (chain == NULL) {
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32
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195 return NGX_ABORT;
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196 }
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197
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198 chain->buf = b;
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199 chain->next = NULL;
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0
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200
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340
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201 } else if (!p->cacheable
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58
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202 && p->downstream->data == p->output_ctx
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76
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203 && p->downstream->write->ready
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204 && !p->downstream->write->delayed)
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58
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205 {
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0
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206 /*
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207 * if the bufs are not needed to be saved in a cache and
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208 * a downstream is ready then write the bufs to a downstream
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209 */
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210
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211 p->upstream_blocked = 1;
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212
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213 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, p->log, 0,
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214 "pipe downstream ready");
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215
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216 break;
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217
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340
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218 } else if (p->cacheable
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0
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219 || p->temp_file->offset < p->max_temp_file_size)
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220 {
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221
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222 /*
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32
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223 * if it is allowed, then save some bufs from r->in
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0
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224 * to a temporary file, and add them to a r->out chain
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225 */
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226
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227 rc = ngx_event_pipe_write_chain_to_temp_file(p);
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228
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229 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, p->log, 0,
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10
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230 "pipe temp offset: %O", p->temp_file->offset);
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0
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231
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70
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232 if (rc == NGX_BUSY) {
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233 break;
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234 }
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235
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0
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236 if (rc == NGX_AGAIN) {
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237 if (ngx_event_flags & NGX_USE_LEVEL_EVENT
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238 && p->upstream->read->active
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239 && p->upstream->read->ready)
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240 {
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241 if (ngx_del_event(p->upstream->read, NGX_READ_EVENT, 0)
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126
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242 == NGX_ERROR)
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0
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243 {
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244 return NGX_ABORT;
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245 }
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246 }
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247 }
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248
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249 if (rc != NGX_OK) {
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250 return rc;
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251 }
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252
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253 chain = p->free_raw_bufs;
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254 if (p->single_buf) {
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255 p->free_raw_bufs = p->free_raw_bufs->next;
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256 chain->next = NULL;
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257 } else {
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258 p->free_raw_bufs = NULL;
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259 }
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260
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261 } else {
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262
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32
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263 /* there are no bufs to read in */
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0
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264
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265 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, p->log, 0,
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266 "no pipe bufs to read in");
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126
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267
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0
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268 break;
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269 }
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270
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126
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271 n = p->upstream->recv_chain(p->upstream, chain);
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0
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272
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273 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, p->log, 0,
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10
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274 "pipe recv chain: %z", n);
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0
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275
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276 if (p->free_raw_bufs) {
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277 chain->next = p->free_raw_bufs;
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278 }
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279 p->free_raw_bufs = chain;
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280
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281 if (n == NGX_ERROR) {
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282 p->upstream_error = 1;
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283 return NGX_ERROR;
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284 }
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285
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286 if (n == NGX_AGAIN) {
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287 if (p->single_buf) {
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288 ngx_event_pipe_remove_shadow_links(chain->buf);
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289 }
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290
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291 break;
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292 }
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293
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294 p->read = 1;
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295
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296 if (n == 0) {
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297 p->upstream_eof = 1;
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298 break;
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299 }
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300 }
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301
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302 p->read_length += n;
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303 cl = chain;
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258
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304 p->free_raw_bufs = NULL;
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0
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305
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306 while (cl && n > 0) {
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307
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308 ngx_event_pipe_remove_shadow_links(cl->buf);
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309
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310 size = cl->buf->end - cl->buf->last;
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311
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312 if (n >= size) {
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313 cl->buf->last = cl->buf->end;
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314
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315 /* STUB */ cl->buf->num = p->num++;
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316
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317 if (p->input_filter(p, cl->buf) == NGX_ERROR) {
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318 return NGX_ABORT;
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319 }
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320
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321 n -= size;
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56
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322 ln = cl;
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0
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323 cl = cl->next;
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56
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324 ngx_free_chain(p->pool, ln);
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0
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325
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326 } else {
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327 cl->buf->last += n;
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328 n = 0;
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329 }
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330 }
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331
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258
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332 if (cl) {
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333 for (ln = cl; ln->next; ln = ln->next) { /* void */ }
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334
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335 ln->next = p->free_raw_bufs;
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336 p->free_raw_bufs = cl;
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337 }
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0
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338 }
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339
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340 #if (NGX_DEBUG)
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341
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2
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342 for (cl = p->busy; cl; cl = cl->next) {
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32
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343 ngx_log_debug8(NGX_LOG_DEBUG_EVENT, p->log, 0,
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344 "pipe buf busy s:%d t:%d f:%d "
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345 "%p, pos %p, size: %z "
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346 "file: %O, size: %z",
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347 (cl->buf->shadow ? 1 : 0),
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348 cl->buf->temporary, cl->buf->in_file,
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0
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349 cl->buf->start, cl->buf->pos,
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32
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350 cl->buf->last - cl->buf->pos,
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351 cl->buf->file_pos,
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352 cl->buf->file_last - cl->buf->file_pos);
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0
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353 }
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354
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2
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355 for (cl = p->out; cl; cl = cl->next) {
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32
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356 ngx_log_debug8(NGX_LOG_DEBUG_EVENT, p->log, 0,
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357 "pipe buf out s:%d t:%d f:%d "
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358 "%p, pos %p, size: %z "
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359 "file: %O, size: %z",
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360 (cl->buf->shadow ? 1 : 0),
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361 cl->buf->temporary, cl->buf->in_file,
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362 cl->buf->start, cl->buf->pos,
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363 cl->buf->last - cl->buf->pos,
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364 cl->buf->file_pos,
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365 cl->buf->file_last - cl->buf->file_pos);
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2
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366 }
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367
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368 for (cl = p->in; cl; cl = cl->next) {
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32
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369 ngx_log_debug8(NGX_LOG_DEBUG_EVENT, p->log, 0,
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370 "pipe buf in s:%d t:%d f:%d "
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371 "%p, pos %p, size: %z "
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372 "file: %O, size: %z",
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373 (cl->buf->shadow ? 1 : 0),
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374 cl->buf->temporary, cl->buf->in_file,
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0
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375 cl->buf->start, cl->buf->pos,
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32
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376 cl->buf->last - cl->buf->pos,
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377 cl->buf->file_pos,
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378 cl->buf->file_last - cl->buf->file_pos);
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0
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379 }
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380
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381 for (cl = p->free_raw_bufs; cl; cl = cl->next) {
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32
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382 ngx_log_debug8(NGX_LOG_DEBUG_EVENT, p->log, 0,
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383 "pipe buf free s:%d t:%d f:%d "
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384 "%p, pos %p, size: %z "
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385 "file: %O, size: %z",
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386 (cl->buf->shadow ? 1 : 0),
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387 cl->buf->temporary, cl->buf->in_file,
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388 cl->buf->start, cl->buf->pos,
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389 cl->buf->last - cl->buf->pos,
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390 cl->buf->file_pos,
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391 cl->buf->file_last - cl->buf->file_pos);
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0
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392 }
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393
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|
640
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394 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, p->log, 0,
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395 "pipe length: %O", p->length);
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396
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0
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397 #endif
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398
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|
640
|
399 if (p->free_raw_bufs && p->length != -1) {
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400 cl = p->free_raw_bufs;
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|
|
401
|
|
|
402 if (cl->buf->last - cl->buf->pos >= p->length) {
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403
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664
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404 p->free_raw_bufs = cl->next;
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405
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|
640
|
406 /* STUB */ cl->buf->num = p->num++;
|
|
|
407
|
|
|
408 if (p->input_filter(p, cl->buf) == NGX_ERROR) {
|
|
|
409 return NGX_ABORT;
|
|
|
410 }
|
|
|
411
|
|
|
412 ngx_free_chain(p->pool, cl);
|
|
|
413 }
|
|
|
414 }
|
|
|
415
|
|
|
416 if (p->length == 0) {
|
|
|
417 p->upstream_done = 1;
|
|
|
418 p->read = 1;
|
|
|
419 }
|
|
|
420
|
|
0
|
421 if ((p->upstream_eof || p->upstream_error) && p->free_raw_bufs) {
|
|
|
422
|
|
|
423 /* STUB */ p->free_raw_bufs->buf->num = p->num++;
|
|
|
424
|
|
|
425 if (p->input_filter(p, p->free_raw_bufs->buf) == NGX_ERROR) {
|
|
|
426 return NGX_ABORT;
|
|
|
427 }
|
|
|
428
|
|
|
429 p->free_raw_bufs = p->free_raw_bufs->next;
|
|
|
430
|
|
486
|
431 if (p->free_bufs && p->buf_to_file == NULL) {
|
|
0
|
432 for (cl = p->free_raw_bufs; cl; cl = cl->next) {
|
|
2
|
433 if (cl->buf->shadow == NULL) {
|
|
126
|
434 ngx_pfree(p->pool, cl->buf->start);
|
|
2
|
435 }
|
|
0
|
436 }
|
|
|
437 }
|
|
|
438 }
|
|
|
439
|
|
340
|
440 if (p->cacheable && p->in) {
|
|
0
|
441 if (ngx_event_pipe_write_chain_to_temp_file(p) == NGX_ABORT) {
|
|
|
442 return NGX_ABORT;
|
|
|
443 }
|
|
|
444 }
|
|
|
445
|
|
|
446 return NGX_OK;
|
|
|
447 }
|
|
|
448
|
|
|
449
|
|
126
|
450 static ngx_int_t
|
|
|
451 ngx_event_pipe_write_to_downstream(ngx_event_pipe_t *p)
|
|
0
|
452 {
|
|
284
|
453 u_char *prev;
|
|
132
|
454 size_t bsize;
|
|
346
|
455 ngx_int_t rc;
|
|
518
|
456 ngx_uint_t flush, flushed, prev_last_shadow;
|
|
464
|
457 ngx_chain_t *out, **ll, *cl, file;
|
|
132
|
458 ngx_connection_t *downstream;
|
|
|
459
|
|
|
460 downstream = p->downstream;
|
|
0
|
461
|
|
|
462 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, p->log, 0,
|
|
132
|
463 "pipe write downstream: %d", downstream->write->ready);
|
|
0
|
464
|
|
518
|
465 flushed = 0;
|
|
|
466
|
|
0
|
467 for ( ;; ) {
|
|
|
468 if (p->downstream_error) {
|
|
|
469 return ngx_event_pipe_drain_chains(p);
|
|
|
470 }
|
|
|
471
|
|
|
472 if (p->upstream_eof || p->upstream_error || p->upstream_done) {
|
|
|
473
|
|
|
474 /* pass the p->out and p->in chains to the output filter */
|
|
|
475
|
|
58
|
476 for (cl = p->busy; cl; cl = cl->next) {
|
|
|
477 cl->buf->recycled = 0;
|
|
|
478 }
|
|
|
479
|
|
0
|
480 if (p->out) {
|
|
|
481 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, p->log, 0,
|
|
|
482 "pipe write downstream flush out");
|
|
|
483
|
|
58
|
484 for (cl = p->out; cl; cl = cl->next) {
|
|
|
485 cl->buf->recycled = 0;
|
|
|
486 }
|
|
|
487
|
|
346
|
488 rc = p->output_filter(p->output_ctx, p->out);
|
|
|
489
|
|
|
490 if (rc == NGX_ERROR) {
|
|
0
|
491 p->downstream_error = 1;
|
|
|
492 return ngx_event_pipe_drain_chains(p);
|
|
|
493 }
|
|
|
494
|
|
|
495 p->out = NULL;
|
|
|
496 }
|
|
|
497
|
|
|
498 if (p->in) {
|
|
|
499 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, p->log, 0,
|
|
|
500 "pipe write downstream flush in");
|
|
|
501
|
|
58
|
502 for (cl = p->in; cl; cl = cl->next) {
|
|
|
503 cl->buf->recycled = 0;
|
|
|
504 }
|
|
|
505
|
|
346
|
506 rc = p->output_filter(p->output_ctx, p->in);
|
|
132
|
507
|
|
346
|
508 if (rc == NGX_ERROR) {
|
|
0
|
509 p->downstream_error = 1;
|
|
|
510 return ngx_event_pipe_drain_chains(p);
|
|
|
511 }
|
|
|
512
|
|
|
513 p->in = NULL;
|
|
|
514 }
|
|
|
515
|
|
464
|
516 if (p->cacheable && p->buf_to_file) {
|
|
|
517
|
|
|
518 file.buf = p->buf_to_file;
|
|
|
519 file.next = NULL;
|
|
|
520
|
|
|
521 if (ngx_write_chain_to_temp_file(p->temp_file, &file)
|
|
|
522 == NGX_ERROR)
|
|
|
523 {
|
|
|
524 return NGX_ABORT;
|
|
|
525 }
|
|
|
526 }
|
|
|
527
|
|
0
|
528 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, p->log, 0,
|
|
|
529 "pipe write downstream done");
|
|
|
530
|
|
|
531 /* TODO: free unused bufs */
|
|
|
532
|
|
|
533 p->downstream_done = 1;
|
|
|
534 break;
|
|
|
535 }
|
|
|
536
|
|
132
|
537 if (downstream->data != p->output_ctx
|
|
|
538 || !downstream->write->ready
|
|
|
539 || downstream->write->delayed)
|
|
58
|
540 {
|
|
0
|
541 break;
|
|
|
542 }
|
|
|
543
|
|
28
|
544 /* bsize is the size of the busy recycled bufs */
|
|
0
|
545
|
|
284
|
546 prev = NULL;
|
|
0
|
547 bsize = 0;
|
|
|
548
|
|
|
549 for (cl = p->busy; cl; cl = cl->next) {
|
|
284
|
550
|
|
28
|
551 if (cl->buf->recycled) {
|
|
284
|
552 if (prev == cl->buf->start) {
|
|
|
553 continue;
|
|
|
554 }
|
|
|
555
|
|
28
|
556 bsize += cl->buf->end - cl->buf->start;
|
|
284
|
557 prev = cl->buf->start;
|
|
28
|
558 }
|
|
0
|
559 }
|
|
|
560
|
|
|
561 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, p->log, 0,
|
|
28
|
562 "pipe write busy: %uz", bsize);
|
|
0
|
563
|
|
|
564 out = NULL;
|
|
284
|
565
|
|
|
566 if (bsize >= (size_t) p->busy_size) {
|
|
|
567 flush = 1;
|
|
|
568 goto flush;
|
|
|
569 }
|
|
|
570
|
|
|
571 flush = 0;
|
|
0
|
572 ll = NULL;
|
|
276
|
573 prev_last_shadow = 1;
|
|
0
|
574
|
|
|
575 for ( ;; ) {
|
|
|
576 if (p->out) {
|
|
|
577 cl = p->out;
|
|
|
578
|
|
646
|
579 if (cl->buf->recycled) {
|
|
|
580 ngx_log_error(NGX_LOG_ALERT, p->log, 0,
|
|
|
581 "recycled buffer in pipe out chain");
|
|
0
|
582 }
|
|
|
583
|
|
|
584 p->out = p->out->next;
|
|
28
|
585
|
|
340
|
586 } else if (!p->cacheable && p->in) {
|
|
0
|
587 cl = p->in;
|
|
|
588
|
|
274
|
589 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, p->log, 0,
|
|
|
590 "pipe write buf ls:%d %p %z",
|
|
|
591 cl->buf->last_shadow,
|
|
|
592 cl->buf->pos,
|
|
|
593 cl->buf->last - cl->buf->pos);
|
|
|
594
|
|
646
|
595 if (cl->buf->recycled && prev_last_shadow) {
|
|
|
596 if (bsize + cl->buf->end - cl->buf->start > p->busy_size) {
|
|
|
597 flush = 1;
|
|
|
598 break;
|
|
276
|
599 }
|
|
|
600
|
|
646
|
601 bsize += cl->buf->end - cl->buf->start;
|
|
0
|
602 }
|
|
|
603
|
|
276
|
604 prev_last_shadow = cl->buf->last_shadow;
|
|
|
605
|
|
0
|
606 p->in = p->in->next;
|
|
|
607
|
|
|
608 } else {
|
|
|
609 break;
|
|
|
610 }
|
|
|
611
|
|
|
612 cl->next = NULL;
|
|
50
|
613
|
|
|
614 if (out) {
|
|
|
615 *ll = cl;
|
|
|
616 } else {
|
|
|
617 out = cl;
|
|
|
618 }
|
|
|
619 ll = &cl->next;
|
|
0
|
620 }
|
|
|
621
|
|
284
|
622 flush:
|
|
|
623
|
|
0
|
624 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, p->log, 0,
|
|
10
|
625 "pipe write: out:%p, f:%d", out, flush);
|
|
0
|
626
|
|
518
|
627 if (out == NULL) {
|
|
|
628
|
|
|
629 if (!flush) {
|
|
|
630 break;
|
|
|
631 }
|
|
|
632
|
|
|
633 /* a workaround for AIO */
|
|
|
634 if (flushed++ > 10) {
|
|
|
635 return NGX_BUSY;
|
|
|
636 }
|
|
0
|
637 }
|
|
|
638
|
|
346
|
639 rc = p->output_filter(p->output_ctx, out);
|
|
|
640
|
|
640
|
641 ngx_chain_update_chains(p->pool, &p->free, &p->busy, &out, p->tag);
|
|
|
642
|
|
346
|
643 if (rc == NGX_ERROR) {
|
|
0
|
644 p->downstream_error = 1;
|
|
|
645 return ngx_event_pipe_drain_chains(p);
|
|
|
646 }
|
|
|
647
|
|
|
648 for (cl = p->free; cl; cl = cl->next) {
|
|
|
649
|
|
|
650 if (cl->buf->temp_file) {
|
|
340
|
651 if (p->cacheable || !p->cyclic_temp_file) {
|
|
0
|
652 continue;
|
|
|
653 }
|
|
|
654
|
|
|
655 /* reset p->temp_offset if all bufs had been sent */
|
|
|
656
|
|
|
657 if (cl->buf->file_last == p->temp_file->offset) {
|
|
|
658 p->temp_file->offset = 0;
|
|
|
659 }
|
|
|
660 }
|
|
|
661
|
|
|
662 /* TODO: free buf if p->free_bufs && upstream done */
|
|
|
663
|
|
|
664 /* add the free shadow raw buf to p->free_raw_bufs */
|
|
|
665
|
|
|
666 if (cl->buf->last_shadow) {
|
|
32
|
667 if (ngx_event_pipe_add_free_buf(p, cl->buf->shadow) != NGX_OK) {
|
|
|
668 return NGX_ABORT;
|
|
|
669 }
|
|
0
|
670
|
|
|
671 cl->buf->last_shadow = 0;
|
|
|
672 }
|
|
|
673
|
|
|
674 cl->buf->shadow = NULL;
|
|
|
675 }
|
|
|
676 }
|
|
|
677
|
|
|
678 return NGX_OK;
|
|
|
679 }
|
|
|
680
|
|
|
681
|
|
126
|
682 static ngx_int_t
|
|
|
683 ngx_event_pipe_write_chain_to_temp_file(ngx_event_pipe_t *p)
|
|
0
|
684 {
|
|
646
|
685 ssize_t size, bsize, n;
|
|
0
|
686 ngx_buf_t *b;
|
|
646
|
687 ngx_uint_t prev_last_shadow;
|
|
|
688 ngx_chain_t *cl, *tl, *next, *out, **ll, **last_out, **last_free, fl;
|
|
0
|
689
|
|
|
690 if (p->buf_to_file) {
|
|
|
691 fl.buf = p->buf_to_file;
|
|
|
692 fl.next = p->in;
|
|
|
693 out = &fl;
|
|
|
694
|
|
|
695 } else {
|
|
|
696 out = p->in;
|
|
|
697 }
|
|
|
698
|
|
340
|
699 if (!p->cacheable) {
|
|
0
|
700
|
|
|
701 size = 0;
|
|
|
702 cl = out;
|
|
|
703 ll = NULL;
|
|
646
|
704 prev_last_shadow = 1;
|
|
0
|
705
|
|
|
706 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, p->log, 0,
|
|
10
|
707 "pipe offset: %O", p->temp_file->offset);
|
|
0
|
708
|
|
|
709 do {
|
|
|
710 bsize = cl->buf->last - cl->buf->pos;
|
|
|
711
|
|
646
|
712 ngx_log_debug4(NGX_LOG_DEBUG_EVENT, p->log, 0,
|
|
|
713 "pipe buf ls:%d %p, pos %p, size: %z",
|
|
|
714 cl->buf->last_shadow, cl->buf->start,
|
|
|
715 cl->buf->pos, bsize);
|
|
0
|
716
|
|
646
|
717 if (prev_last_shadow
|
|
|
718 && ((size + bsize > p->temp_file_write_size)
|
|
|
719 || (p->temp_file->offset + size + bsize
|
|
|
720 > p->max_temp_file_size)))
|
|
0
|
721 {
|
|
|
722 break;
|
|
|
723 }
|
|
|
724
|
|
646
|
725 prev_last_shadow = cl->buf->last_shadow;
|
|
|
726
|
|
0
|
727 size += bsize;
|
|
|
728 ll = &cl->next;
|
|
|
729 cl = cl->next;
|
|
|
730
|
|
|
731 } while (cl);
|
|
|
732
|
|
10
|
733 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, p->log, 0, "size: %z", size);
|
|
0
|
734
|
|
70
|
735 if (ll == NULL) {
|
|
|
736 return NGX_BUSY;
|
|
|
737 }
|
|
|
738
|
|
0
|
739 if (cl) {
|
|
|
740 p->in = cl;
|
|
|
741 *ll = NULL;
|
|
|
742
|
|
|
743 } else {
|
|
|
744 p->in = NULL;
|
|
|
745 p->last_in = &p->in;
|
|
|
746 }
|
|
|
747
|
|
|
748 } else {
|
|
|
749 p->in = NULL;
|
|
|
750 p->last_in = &p->in;
|
|
|
751 }
|
|
|
752
|
|
646
|
753 n = ngx_write_chain_to_temp_file(p->temp_file, out);
|
|
|
754
|
|
|
755 if (n == NGX_ERROR) {
|
|
0
|
756 return NGX_ABORT;
|
|
|
757 }
|
|
|
758
|
|
646
|
759 if (p->buf_to_file) {
|
|
|
760 p->temp_file->offset = p->buf_to_file->last - p->buf_to_file->pos;
|
|
|
761 n -= p->buf_to_file->last - p->buf_to_file->pos;
|
|
|
762 p->buf_to_file = NULL;
|
|
|
763 out = out->next;
|
|
|
764 }
|
|
|
765
|
|
|
766 if (n > 0) {
|
|
|
767 /* update previous buffer or add new buffer */
|
|
|
768
|
|
|
769 if (p->out) {
|
|
|
770 for (cl = p->out; cl->next; cl = cl->next) { /* void */ }
|
|
|
771
|
|
|
772 b = cl->buf;
|
|
|
773
|
|
|
774 if (b->file_last == p->temp_file->offset) {
|
|
|
775 p->temp_file->offset += n;
|
|
|
776 b->file_last = p->temp_file->offset;
|
|
|
777 goto free;
|
|
|
778 }
|
|
|
779
|
|
|
780 last_out = &cl->next;
|
|
|
781
|
|
|
782 } else {
|
|
|
783 last_out = &p->out;
|
|
|
784 }
|
|
|
785
|
|
|
786 cl = ngx_chain_get_free_buf(p->pool, &p->free);
|
|
|
787 if (cl == NULL) {
|
|
|
788 return NGX_ABORT;
|
|
|
789 }
|
|
|
790
|
|
|
791 b = cl->buf;
|
|
|
792
|
|
|
793 ngx_memzero(b, sizeof(ngx_buf_t));
|
|
|
794
|
|
|
795 b->tag = p->tag;
|
|
|
796
|
|
|
797 b->file = &p->temp_file->file;
|
|
|
798 b->file_pos = p->temp_file->offset;
|
|
|
799 p->temp_file->offset += n;
|
|
|
800 b->file_last = p->temp_file->offset;
|
|
|
801
|
|
|
802 b->in_file = 1;
|
|
|
803 b->temp_file = 1;
|
|
|
804
|
|
|
805 *last_out = cl;
|
|
|
806 }
|
|
|
807
|
|
|
808 free:
|
|
|
809
|
|
0
|
810 for (last_free = &p->free_raw_bufs;
|
|
|
811 *last_free != NULL;
|
|
|
812 last_free = &(*last_free)->next)
|
|
|
813 {
|
|
|
814 /* void */
|
|
|
815 }
|
|
|
816
|
|
|
817 for (cl = out; cl; cl = next) {
|
|
|
818 next = cl->next;
|
|
646
|
819
|
|
|
820 cl->next = p->free;
|
|
|
821 p->free = cl;
|
|
0
|
822
|
|
|
823 b = cl->buf;
|
|
|
824
|
|
|
825 if (b->last_shadow) {
|
|
32
|
826
|
|
50
|
827 tl = ngx_alloc_chain_link(p->pool);
|
|
|
828 if (tl == NULL) {
|
|
32
|
829 return NGX_ABORT;
|
|
|
830 }
|
|
|
831
|
|
|
832 tl->buf = b->shadow;
|
|
|
833 tl->next = NULL;
|
|
|
834
|
|
|
835 *last_free = tl;
|
|
|
836 last_free = &tl->next;
|
|
|
837
|
|
2
|
838 b->shadow->pos = b->shadow->start;
|
|
|
839 b->shadow->last = b->shadow->start;
|
|
|
840
|
|
32
|
841 ngx_event_pipe_remove_shadow_links(b->shadow);
|
|
0
|
842 }
|
|
|
843 }
|
|
|
844
|
|
|
845 return NGX_OK;
|
|
|
846 }
|
|
|
847
|
|
|
848
|
|
|
849 /* the copy input filter */
|
|
|
850
|
|
126
|
851 ngx_int_t
|
|
|
852 ngx_event_pipe_copy_input_filter(ngx_event_pipe_t *p, ngx_buf_t *buf)
|
|
0
|
853 {
|
|
|
854 ngx_buf_t *b;
|
|
|
855 ngx_chain_t *cl;
|
|
|
856
|
|
|
857 if (buf->pos == buf->last) {
|
|
|
858 return NGX_OK;
|
|
|
859 }
|
|
|
860
|
|
|
861 if (p->free) {
|
|
56
|
862 cl = p->free;
|
|
|
863 b = cl->buf;
|
|
|
864 p->free = cl->next;
|
|
|
865 ngx_free_chain(p->pool, cl);
|
|
0
|
866
|
|
|
867 } else {
|
|
50
|
868 b = ngx_alloc_buf(p->pool);
|
|
|
869 if (b == NULL) {
|
|
0
|
870 return NGX_ERROR;
|
|
|
871 }
|
|
|
872 }
|
|
|
873
|
|
|
874 ngx_memcpy(b, buf, sizeof(ngx_buf_t));
|
|
|
875 b->shadow = buf;
|
|
|
876 b->tag = p->tag;
|
|
|
877 b->last_shadow = 1;
|
|
|
878 b->recycled = 1;
|
|
|
879 buf->shadow = b;
|
|
|
880
|
|
50
|
881 cl = ngx_alloc_chain_link(p->pool);
|
|
|
882 if (cl == NULL) {
|
|
32
|
883 return NGX_ERROR;
|
|
|
884 }
|
|
|
885
|
|
|
886 cl->buf = b;
|
|
|
887 cl->next = NULL;
|
|
0
|
888
|
|
28
|
889 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, p->log, 0, "input buf #%d", b->num);
|
|
0
|
890
|
|
50
|
891 if (p->in) {
|
|
|
892 *p->last_in = cl;
|
|
|
893 } else {
|
|
|
894 p->in = cl;
|
|
|
895 }
|
|
|
896 p->last_in = &cl->next;
|
|
0
|
897
|
|
640
|
898 if (p->length == -1) {
|
|
|
899 return NGX_OK;
|
|
|
900 }
|
|
|
901
|
|
|
902 p->length -= b->last - b->pos;
|
|
|
903
|
|
0
|
904 return NGX_OK;
|
|
|
905 }
|
|
|
906
|
|
|
907
|
|
126
|
908 static ngx_inline void
|
|
|
909 ngx_event_pipe_remove_shadow_links(ngx_buf_t *buf)
|
|
0
|
910 {
|
|
|
911 ngx_buf_t *b, *next;
|
|
|
912
|
|
2
|
913 b = buf->shadow;
|
|
|
914
|
|
|
915 if (b == NULL) {
|
|
0
|
916 return;
|
|
|
917 }
|
|
|
918
|
|
|
919 while (!b->last_shadow) {
|
|
|
920 next = b->shadow;
|
|
|
921
|
|
2
|
922 b->temporary = 0;
|
|
|
923 b->recycled = 0;
|
|
0
|
924
|
|
|
925 b->shadow = NULL;
|
|
|
926 b = next;
|
|
|
927 }
|
|
|
928
|
|
2
|
929 b->temporary = 0;
|
|
|
930 b->recycled = 0;
|
|
0
|
931 b->last_shadow = 0;
|
|
|
932
|
|
|
933 b->shadow = NULL;
|
|
|
934
|
|
|
935 buf->shadow = NULL;
|
|
|
936 }
|
|
|
937
|
|
|
938
|
|
126
|
939 ngx_int_t
|
|
|
940 ngx_event_pipe_add_free_buf(ngx_event_pipe_t *p, ngx_buf_t *b)
|
|
0
|
941 {
|
|
32
|
942 ngx_chain_t *cl;
|
|
|
943
|
|
50
|
944 cl = ngx_alloc_chain_link(p->pool);
|
|
|
945 if (cl == NULL) {
|
|
32
|
946 return NGX_ERROR;
|
|
0
|
947 }
|
|
|
948
|
|
32
|
949 b->pos = b->start;
|
|
|
950 b->last = b->start;
|
|
|
951 b->shadow = NULL;
|
|
|
952
|
|
|
953 cl->buf = b;
|
|
|
954
|
|
|
955 if (p->free_raw_bufs == NULL) {
|
|
|
956 p->free_raw_bufs = cl;
|
|
|
957 cl->next = NULL;
|
|
|
958
|
|
|
959 return NGX_OK;
|
|
|
960 }
|
|
|
961
|
|
|
962 if (p->free_raw_bufs->buf->pos == p->free_raw_bufs->buf->last) {
|
|
0
|
963
|
|
32
|
964 /* add the free buf to the list start */
|
|
|
965
|
|
|
966 cl->next = p->free_raw_bufs;
|
|
|
967 p->free_raw_bufs = cl;
|
|
|
968
|
|
|
969 return NGX_OK;
|
|
0
|
970 }
|
|
32
|
971
|
|
664
|
972 /* the first free buf is partially filled, thus add the free buf after it */
|
|
32
|
973
|
|
|
974 cl->next = p->free_raw_bufs->next;
|
|
|
975 p->free_raw_bufs->next = cl;
|
|
|
976
|
|
|
977 return NGX_OK;
|
|
0
|
978 }
|
|
|
979
|
|
|
980
|
|
126
|
981 static ngx_int_t
|
|
|
982 ngx_event_pipe_drain_chains(ngx_event_pipe_t *p)
|
|
0
|
983 {
|
|
|
984 ngx_chain_t *cl, *tl;
|
|
|
985
|
|
|
986 for ( ;; ) {
|
|
|
987 if (p->busy) {
|
|
|
988 cl = p->busy;
|
|
|
989 p->busy = NULL;
|
|
|
990
|
|
|
991 } else if (p->out) {
|
|
|
992 cl = p->out;
|
|
|
993 p->out = NULL;
|
|
|
994
|
|
|
995 } else if (p->in) {
|
|
|
996 cl = p->in;
|
|
|
997 p->in = NULL;
|
|
|
998
|
|
|
999 } else {
|
|
|
1000 return NGX_OK;
|
|
|
1001 }
|
|
|
1002
|
|
|
1003 while (cl) {
|
|
|
1004 if (cl->buf->last_shadow) {
|
|
32
|
1005 if (ngx_event_pipe_add_free_buf(p, cl->buf->shadow) != NGX_OK) {
|
|
28
|
1006 return NGX_ABORT;
|
|
|
1007 }
|
|
|
1008
|
|
0
|
1009 cl->buf->last_shadow = 0;
|
|
|
1010 }
|
|
|
1011
|
|
|
1012 cl->buf->shadow = NULL;
|
|
|
1013 tl = cl->next;
|
|
|
1014 cl->next = p->free;
|
|
|
1015 p->free = cl;
|
|
|
1016 cl = tl;
|
|
|
1017 }
|
|
|
1018 }
|
|
|
1019 }
|
