Mercurial > hg > nginx-quic
annotate src/mail/ngx_mail_smtp_module.h @ 5970:74edc0ccf27a
Core: fixed a race resulting in extra sem_post()'s.
The mtx->wait counter was not decremented if we were able to obtain the lock
right after incrementing it. This resulted in unneeded sem_post() calls,
eventually leading to EOVERFLOW errors being logged, "sem_post() failed
while wake shmtx (75: Value too large for defined data type)".
To close the race, mtx->wait is now decremented if we obtain the lock right
after incrementing it in ngx_shmtx_lock(). The result can become -1 if a
concurrent ngx_shmtx_unlock() decrements mtx->wait before the added code does.
However, that only leads to one extra iteration in the next call of
ngx_shmtx_lock().
author | Roman Arutyunyan <arut@nginx.com> |
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date | Wed, 04 Feb 2015 16:22:43 +0300 |
parents | d620f497c50f |
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rev | line source |
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ngx_mail_pop3_module, ngx_mail_imap_module, and ngx_mail_smtp_module
Igor Sysoev <igor@sysoev.ru>
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1 |
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2 /* |
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3 * Copyright (C) Igor Sysoev |
4412 | 4 * Copyright (C) Nginx, Inc. |
1487
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5 */ |
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6 |
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8 #ifndef _NGX_MAIL_SMTP_MODULE_H_INCLUDED_ |
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9 #define _NGX_MAIL_SMTP_MODULE_H_INCLUDED_ |
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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_mail.h> |
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15 #include <ngx_mail_smtp_module.h> |
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18 typedef struct { |
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19 ngx_msec_t greeting_delay; |
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20 |
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21 size_t client_buffer_size; |
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23 ngx_str_t capability; |
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24 ngx_str_t starttls_capability; |
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25 ngx_str_t starttls_only_capability; |
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27 ngx_str_t server_name; |
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28 ngx_str_t greeting; |
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30 ngx_uint_t auth_methods; |
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32 ngx_array_t capabilities; |
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33 } ngx_mail_smtp_srv_conf_t; |
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36 void ngx_mail_smtp_init_session(ngx_mail_session_t *s, ngx_connection_t *c); |
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37 void ngx_mail_smtp_init_protocol(ngx_event_t *rev); |
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38 void ngx_mail_smtp_auth_state(ngx_event_t *rev); |
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39 ngx_int_t ngx_mail_smtp_parse_command(ngx_mail_session_t *s); |
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41 |
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42 extern ngx_module_t ngx_mail_smtp_module; |
f69493e8faab
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parents:
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parents:
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ngx_mail_pop3_module, ngx_mail_imap_module, and ngx_mail_smtp_module
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parents:
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45 #endif /* _NGX_MAIL_SMTP_MODULE_H_INCLUDED_ */ |