Mercurial > hg > nginx-quic
annotate src/http/ngx_http_upstream_round_robin.h @ 6755:e2f13011343e stable-1.10
HTTP/2: fixed the "http request count is zero" alert.
When the stream is terminated the HEADERS frame can still wait in the output
queue. This frame can't be removed and must be sent to the client anyway,
since HTTP/2 uses stateful compression for headers. So in order to postpone
closing and freeing memory of such stream the special close stream handler
is set to the write event. After the HEADERS frame is sent the write event
is called and the stream will be finally closed.
Some events like receiving a RST_STREAM can trigger the read handler of such
stream in closing state and cause unexpected processing that can result in
another attempt to finalize the request. To prevent it the read handler is
now set to ngx_http_empty_handler.
Thanks to Amazon.
author | Valentin Bartenev <vbart@nginx.com> |
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date | Thu, 16 Jun 2016 20:55:11 +0300 |
parents | 311d232ad803 |
children | d69964eb8335 |
rev | line source |
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884 | 1 |
2 /* | |
3 * Copyright (C) Igor Sysoev | |
4412 | 4 * Copyright (C) Nginx, Inc. |
884 | 5 */ |
6 | |
7 | |
8 #ifndef _NGX_HTTP_UPSTREAM_ROUND_ROBIN_H_INCLUDED_ | |
9 #define _NGX_HTTP_UPSTREAM_ROUND_ROBIN_H_INCLUDED_ | |
10 | |
11 | |
12 #include <ngx_config.h> | |
13 #include <ngx_core.h> | |
14 #include <ngx_http.h> | |
15 | |
16 | |
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17 typedef struct ngx_http_upstream_rr_peer_s ngx_http_upstream_rr_peer_t; |
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18 |
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19 struct ngx_http_upstream_rr_peer_s { |
884 | 20 struct sockaddr *sockaddr; |
21 socklen_t socklen; | |
22 ngx_str_t name; | |
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23 ngx_str_t server; |
884 | 24 |
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25 ngx_int_t current_weight; |
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26 ngx_int_t effective_weight; |
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27 ngx_int_t weight; |
884 | 28 |
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29 ngx_uint_t conns; |
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30 |
884 | 31 ngx_uint_t fails; |
32 time_t accessed; | |
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33 time_t checked; |
884 | 34 |
35 ngx_uint_t max_fails; | |
36 time_t fail_timeout; | |
37 | |
38 ngx_uint_t down; /* unsigned down:1; */ | |
39 | |
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40 #if (NGX_HTTP_SSL) |
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41 void *ssl_session; |
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42 int ssl_session_len; |
884 | 43 #endif |
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44 |
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45 ngx_http_upstream_rr_peer_t *next; |
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46 |
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47 #if (NGX_HTTP_UPSTREAM_ZONE) |
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48 ngx_atomic_t lock; |
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49 #endif |
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50 }; |
884 | 51 |
52 | |
1378 | 53 typedef struct ngx_http_upstream_rr_peers_s ngx_http_upstream_rr_peers_t; |
54 | |
55 struct ngx_http_upstream_rr_peers_s { | |
884 | 56 ngx_uint_t number; |
57 | |
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58 #if (NGX_HTTP_UPSTREAM_ZONE) |
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59 ngx_slab_pool_t *shpool; |
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60 ngx_atomic_t rwlock; |
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61 ngx_http_upstream_rr_peers_t *zone_next; |
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62 #endif |
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63 |
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64 ngx_uint_t total_weight; |
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65 |
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66 unsigned single:1; |
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67 unsigned weighted:1; |
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68 |
884 | 69 ngx_str_t *name; |
70 | |
1378 | 71 ngx_http_upstream_rr_peers_t *next; |
72 | |
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73 ngx_http_upstream_rr_peer_t *peer; |
1378 | 74 }; |
884 | 75 |
76 | |
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77 #if (NGX_HTTP_UPSTREAM_ZONE) |
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78 |
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79 #define ngx_http_upstream_rr_peers_rlock(peers) \ |
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80 \ |
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81 if (peers->shpool) { \ |
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82 ngx_rwlock_rlock(&peers->rwlock); \ |
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83 } |
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84 |
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85 #define ngx_http_upstream_rr_peers_wlock(peers) \ |
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86 \ |
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87 if (peers->shpool) { \ |
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88 ngx_rwlock_wlock(&peers->rwlock); \ |
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89 } |
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90 |
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91 #define ngx_http_upstream_rr_peers_unlock(peers) \ |
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92 \ |
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93 if (peers->shpool) { \ |
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94 ngx_rwlock_unlock(&peers->rwlock); \ |
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95 } |
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96 |
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97 |
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98 #define ngx_http_upstream_rr_peer_lock(peers, peer) \ |
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99 \ |
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100 if (peers->shpool) { \ |
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101 ngx_rwlock_wlock(&peer->lock); \ |
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102 } |
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103 |
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104 #define ngx_http_upstream_rr_peer_unlock(peers, peer) \ |
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105 \ |
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106 if (peers->shpool) { \ |
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107 ngx_rwlock_unlock(&peer->lock); \ |
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108 } |
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109 |
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110 #else |
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111 |
6102 | 112 #define ngx_http_upstream_rr_peers_rlock(peers) |
113 #define ngx_http_upstream_rr_peers_wlock(peers) | |
114 #define ngx_http_upstream_rr_peers_unlock(peers) | |
115 #define ngx_http_upstream_rr_peer_lock(peers, peer) | |
116 #define ngx_http_upstream_rr_peer_unlock(peers, peer) | |
117 | |
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118 #endif |
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119 |
6102 | 120 |
884 | 121 typedef struct { |
122 ngx_http_upstream_rr_peers_t *peers; | |
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123 ngx_http_upstream_rr_peer_t *current; |
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124 uintptr_t *tried; |
884 | 125 uintptr_t data; |
126 } ngx_http_upstream_rr_peer_data_t; | |
127 | |
128 | |
129 ngx_int_t ngx_http_upstream_init_round_robin(ngx_conf_t *cf, | |
130 ngx_http_upstream_srv_conf_t *us); | |
131 ngx_int_t ngx_http_upstream_init_round_robin_peer(ngx_http_request_t *r, | |
132 ngx_http_upstream_srv_conf_t *us); | |
1658 | 133 ngx_int_t ngx_http_upstream_create_round_robin_peer(ngx_http_request_t *r, |
134 ngx_http_upstream_resolved_t *ur); | |
884 | 135 ngx_int_t ngx_http_upstream_get_round_robin_peer(ngx_peer_connection_t *pc, |
136 void *data); | |
137 void ngx_http_upstream_free_round_robin_peer(ngx_peer_connection_t *pc, | |
138 void *data, ngx_uint_t state); | |
139 | |
140 #if (NGX_HTTP_SSL) | |
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141 ngx_int_t |
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142 ngx_http_upstream_set_round_robin_peer_session(ngx_peer_connection_t *pc, |
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143 void *data); |
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144 void ngx_http_upstream_save_round_robin_peer_session(ngx_peer_connection_t *pc, |
884 | 145 void *data); |
146 #endif | |
147 | |
148 | |
149 #endif /* _NGX_HTTP_UPSTREAM_ROUND_ROBIN_H_INCLUDED_ */ |