Mercurial > hg > nginx
annotate src/os/unix/ngx_process_cycle.h @ 7142:b9d919b53593 stable-1.12
Stream: relaxed next upstream condition (ticket #1317).
When switching to a next upstream, some buffers could be stuck in the middle
of the filter chain. A condition existed that raised an error when this
happened. As it turned out, this condition prevented switching to a next
upstream if ssl preread was used with the TCP protocol (see the ticket).
In fact, the condition does not make sense for TCP, since after successful
connection to an upstream switching to another upstream never happens. As for
UDP, the issue with stuck buffers is unlikely to happen, but is still possible.
Specifically, if a filter delays sending data to upstream.
The condition can be relaxed to only check the "buffered" bitmask of the
upstream connection. The new condition is simpler and fixes the ticket issue
as well. Additionally, the upstream_out chain is now reset for UDP prior to
connecting to a new upstream to prevent repeating the client data twice.
author | Roman Arutyunyan <arut@nginx.com> |
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date | Mon, 11 Sep 2017 15:32:31 +0300 |
parents | b4cc553aafeb |
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rev | line source |
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2 /* |
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3 * Copyright (C) Igor Sysoev |
4412 | 4 * Copyright (C) Nginx, Inc. |
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5 */ |
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8 #ifndef _NGX_PROCESS_CYCLE_H_INCLUDED_ |
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9 #define _NGX_PROCESS_CYCLE_H_INCLUDED_ |
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12 #include <ngx_config.h> |
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13 #include <ngx_core.h> |
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16 #define NGX_CMD_OPEN_CHANNEL 1 |
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17 #define NGX_CMD_CLOSE_CHANNEL 2 |
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18 #define NGX_CMD_QUIT 3 |
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19 #define NGX_CMD_TERMINATE 4 |
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20 #define NGX_CMD_REOPEN 5 |
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21 |
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22 |
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23 #define NGX_PROCESS_SINGLE 0 |
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24 #define NGX_PROCESS_MASTER 1 |
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25 #define NGX_PROCESS_SIGNALLER 2 |
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26 #define NGX_PROCESS_WORKER 3 |
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27 #define NGX_PROCESS_HELPER 4 |
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29 |
3018 | 30 typedef struct { |
31 ngx_event_handler_pt handler; | |
32 char *name; | |
33 ngx_msec_t delay; | |
34 } ngx_cache_manager_ctx_t; | |
35 | |
36 | |
452 | 37 void ngx_master_process_cycle(ngx_cycle_t *cycle); |
38 void ngx_single_process_cycle(ngx_cycle_t *cycle); | |
278
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39 |
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41 extern ngx_uint_t ngx_process; |
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42 extern ngx_uint_t ngx_worker; |
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43 extern ngx_pid_t ngx_pid; |
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44 extern ngx_pid_t ngx_new_binary; |
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45 extern ngx_uint_t ngx_inherited; |
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46 extern ngx_uint_t ngx_daemonized; |
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47 extern ngx_uint_t ngx_exiting; |
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48 |
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49 extern sig_atomic_t ngx_reap; |
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50 extern sig_atomic_t ngx_sigio; |
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51 extern sig_atomic_t ngx_sigalrm; |
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52 extern sig_atomic_t ngx_quit; |
477 | 53 extern sig_atomic_t ngx_debug_quit; |
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54 extern sig_atomic_t ngx_terminate; |
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55 extern sig_atomic_t ngx_noaccept; |
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56 extern sig_atomic_t ngx_reconfigure; |
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57 extern sig_atomic_t ngx_reopen; |
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58 extern sig_atomic_t ngx_change_binary; |
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59 |
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60 |
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61 #endif /* _NGX_PROCESS_CYCLE_H_INCLUDED_ */ |