Mercurial > hg > nginx
annotate src/os/unix/ngx_udp_recv.c @ 4340:4533d7684e14
Cache: only complain on long locked entries.
There have been multiple reports of cases where a real locked entry was
removed, resulting in a segmentation fault later in a worker which locked
the entry. It looks like default inactive timeout isn't enough in real
life.
For now just ignore such locked entries, and move them to the top of the
inactive queue to allow processing of other entries.
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Mon, 12 Dec 2011 10:49:14 +0000 |
parents | ac33852faaac |
children | d620f497c50f |
rev | line source |
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441
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1 |
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2 /* |
444
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3 * Copyright (C) Igor Sysoev |
441
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4 */ |
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5 |
91
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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> |
96
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10 |
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11 |
469 | 12 #if (NGX_HAVE_KQUEUE) |
91
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13 |
1680 | 14 ssize_t |
1689 | 15 ngx_udp_unix_recv(ngx_connection_t *c, u_char *buf, size_t size) |
91
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16 { |
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17 ssize_t n; |
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18 ngx_err_t err; |
96
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19 ngx_event_t *rev; |
91
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20 |
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21 rev = c->read; |
91
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22 |
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23 do { |
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24 n = recv(c->fd, buf, size, 0); |
91
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25 |
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26 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0, |
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27 "recv: fd:%d %d of %d", c->fd, n, size); |
93
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28 |
96
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29 if (n >= 0) { |
455 | 30 if (ngx_event_flags & NGX_USE_KQUEUE_EVENT) { |
96
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31 rev->available -= n; |
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32 |
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33 /* |
583 | 34 * rev->available may be negative here because some additional |
587 | 35 * bytes may be received between kevent() and recv() |
163
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36 */ |
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37 |
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38 if (rev->available <= 0) { |
1689 | 39 rev->ready = 0; |
605 | 40 rev->available = 0; |
41 } | |
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42 } |
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43 |
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44 return n; |
91
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45 } |
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46 |
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47 err = ngx_socket_errno; |
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48 |
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49 if (err == NGX_EAGAIN || err == NGX_EINTR) { |
257
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50 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, err, |
253
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51 "recv() not ready"); |
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52 n = NGX_AGAIN; |
91
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53 |
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54 } else { |
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55 n = ngx_connection_error(c, err, "recv() failed"); |
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56 break; |
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57 } |
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58 |
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59 } while (err == NGX_EINTR); |
188
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60 |
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61 rev->ready = 0; |
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62 |
3642 | 63 if (n == NGX_ERROR) { |
184
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64 rev->error = 1; |
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65 } |
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66 |
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67 return n; |
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68 } |
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69 |
469 | 70 #else /* ! NGX_HAVE_KQUEUE */ |
96
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71 |
1680 | 72 ssize_t |
1689 | 73 ngx_udp_unix_recv(ngx_connection_t *c, u_char *buf, size_t size) |
96
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74 { |
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75 ssize_t n; |
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76 ngx_err_t err; |
96
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77 ngx_event_t *rev; |
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78 |
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79 rev = c->read; |
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80 |
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81 do { |
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82 n = recv(c->fd, buf, size, 0); |
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83 |
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84 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0, |
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85 "recv: fd:%d %d of %d", c->fd, n, size); |
96
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86 |
1689 | 87 if (n >= 0) { |
96
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88 return n; |
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89 } |
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90 |
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91 err = ngx_socket_errno; |
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92 |
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93 if (err == NGX_EAGAIN || err == NGX_EINTR) { |
257
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94 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, err, |
253
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95 "recv() not ready"); |
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96 n = NGX_AGAIN; |
96
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97 |
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98 } else { |
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99 n = ngx_connection_error(c, err, "recv() failed"); |
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100 break; |
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101 } |
96
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102 |
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103 } while (err == NGX_EINTR); |
188
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104 |
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105 rev->ready = 0; |
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106 |
3642 | 107 if (n == NGX_ERROR) { |
184
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108 rev->error = 1; |
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109 } |
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110 |
96
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111 return n; |
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112 } |
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113 |
469 | 114 #endif /* NGX_HAVE_KQUEUE */ |