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6115
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1
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2 /*
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3 * Copyright (C) Igor Sysoev
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4 * Copyright (C) Nginx, Inc.
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5 */
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6
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7
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8 #ifndef _NGX_STREAM_UPSTREAM_ROUND_ROBIN_H_INCLUDED_
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9 #define _NGX_STREAM_UPSTREAM_ROUND_ROBIN_H_INCLUDED_
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10
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11
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12 #include <ngx_config.h>
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13 #include <ngx_core.h>
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14 #include <ngx_stream.h>
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15
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16
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17 typedef struct ngx_stream_upstream_rr_peer_s ngx_stream_upstream_rr_peer_t;
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18
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19 struct ngx_stream_upstream_rr_peer_s {
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20 struct sockaddr *sockaddr;
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21 socklen_t socklen;
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22 ngx_str_t name;
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23 ngx_str_t server;
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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;
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28
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29 ngx_uint_t conns;
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30
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31 ngx_uint_t fails;
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32 time_t accessed;
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33 time_t checked;
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34
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35 ngx_uint_t max_fails;
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36 time_t fail_timeout;
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37
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38 ngx_uint_t down; /* unsigned down:1; */
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39
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40 #if (NGX_STREAM_SSL)
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41 void *ssl_session;
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42 int ssl_session_len;
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43 #endif
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44
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45 ngx_stream_upstream_rr_peer_t *next;
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46
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47 #if (NGX_STREAM_UPSTREAM_ZONE)
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48 ngx_atomic_t lock;
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49 #endif
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50 };
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51
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52
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53 typedef struct ngx_stream_upstream_rr_peers_s ngx_stream_upstream_rr_peers_t;
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54
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55 struct ngx_stream_upstream_rr_peers_s {
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56 ngx_uint_t number;
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57
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58 #if (NGX_STREAM_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 #endif
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62
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63 ngx_uint_t total_weight;
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64
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65 unsigned single:1;
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66 unsigned weighted:1;
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67
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68 ngx_str_t *name;
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69
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70 ngx_stream_upstream_rr_peers_t *next;
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71
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72 ngx_stream_upstream_rr_peer_t *peer;
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73 };
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74
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75
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76 #if (NGX_STREAM_UPSTREAM_ZONE)
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77
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78 #define ngx_stream_upstream_rr_peers_rlock(peers) \
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79 \
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80 if (peers->shpool) { \
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81 ngx_rwlock_rlock(&peers->rwlock); \
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82 }
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83
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84 #define ngx_stream_upstream_rr_peers_wlock(peers) \
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85 \
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86 if (peers->shpool) { \
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87 ngx_rwlock_wlock(&peers->rwlock); \
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88 }
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89
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90 #define ngx_stream_upstream_rr_peers_unlock(peers) \
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91 \
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92 if (peers->shpool) { \
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93 ngx_rwlock_unlock(&peers->rwlock); \
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94 }
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95
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96
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97 #define ngx_stream_upstream_rr_peer_lock(peers, peer) \
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98 \
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99 if (peers->shpool) { \
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100 ngx_rwlock_wlock(&peer->lock); \
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101 }
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102
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103 #define ngx_stream_upstream_rr_peer_unlock(peers, peer) \
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104 \
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105 if (peers->shpool) { \
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106 ngx_rwlock_unlock(&peer->lock); \
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107 }
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108
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109 #else
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110
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111 #define ngx_stream_upstream_rr_peers_rlock(peers)
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112 #define ngx_stream_upstream_rr_peers_wlock(peers)
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113 #define ngx_stream_upstream_rr_peers_unlock(peers)
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114 #define ngx_stream_upstream_rr_peer_lock(peers, peer)
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115 #define ngx_stream_upstream_rr_peer_unlock(peers, peer)
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116
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117 #endif
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118
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119
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120 typedef struct {
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121 ngx_stream_upstream_rr_peers_t *peers;
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122 ngx_stream_upstream_rr_peer_t *current;
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123 uintptr_t *tried;
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124 uintptr_t data;
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125 } ngx_stream_upstream_rr_peer_data_t;
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126
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127
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128 ngx_int_t ngx_stream_upstream_init_round_robin(ngx_conf_t *cf,
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129 ngx_stream_upstream_srv_conf_t *us);
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130 ngx_int_t ngx_stream_upstream_init_round_robin_peer(ngx_stream_session_t *s,
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131 ngx_stream_upstream_srv_conf_t *us);
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132 ngx_int_t ngx_stream_upstream_get_round_robin_peer(ngx_peer_connection_t *pc,
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133 void *data);
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134 void ngx_stream_upstream_free_round_robin_peer(ngx_peer_connection_t *pc,
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135 void *data, ngx_uint_t state);
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136
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137
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138 #endif /* _NGX_STREAM_UPSTREAM_ROUND_ROBIN_H_INCLUDED_ */
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