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