Mercurial > hg > nginx
annotate src/os/unix/ngx_shmem.c @ 7441:8acaa1161783
Stream: do not split datagrams when limiting proxy rate.
Previously, when using proxy_upload_rate and proxy_download_rate, the buffer
size for reading from a socket could be reduced as a result of rate limiting.
For connection-oriented protocols this behavior is normal since unread data will
normally be read at the next iteration. But for datagram-oriented protocols
this is not the case, and unread part of the datagram is lost.
Now buffer size is not limited for datagrams. Rate limiting still works in this
case by delaying the next reading event.
author | Roman Arutyunyan <arut@nginx.com> |
---|---|
date | Thu, 27 Dec 2018 19:37:34 +0300 |
parents | d620f497c50f |
children |
rev | line source |
---|---|
441
da8c5707af39
nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
Igor Sysoev <igor@sysoev.ru>
parents:
358
diff
changeset
|
1 |
da8c5707af39
nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
Igor Sysoev <igor@sysoev.ru>
parents:
358
diff
changeset
|
2 /* |
444
42d11f017717
nginx-0.1.0-2004-09-29-20:00:49 import; remove years from copyright
Igor Sysoev <igor@sysoev.ru>
parents:
441
diff
changeset
|
3 * Copyright (C) Igor Sysoev |
4412 | 4 * Copyright (C) Nginx, Inc. |
441
da8c5707af39
nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
Igor Sysoev <igor@sysoev.ru>
parents:
358
diff
changeset
|
5 */ |
da8c5707af39
nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
Igor Sysoev <igor@sysoev.ru>
parents:
358
diff
changeset
|
6 |
358
0a03c921c81d
nginx-0.0.7-2004-06-17-21:18:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
7 |
0a03c921c81d
nginx-0.0.7-2004-06-17-21:18:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
8 #include <ngx_config.h> |
0a03c921c81d
nginx-0.0.7-2004-06-17-21:18:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
9 #include <ngx_core.h> |
0a03c921c81d
nginx-0.0.7-2004-06-17-21:18:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
10 |
0a03c921c81d
nginx-0.0.7-2004-06-17-21:18:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
11 |
469 | 12 #if (NGX_HAVE_MAP_ANON) |
358
0a03c921c81d
nginx-0.0.7-2004-06-17-21:18:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
13 |
605 | 14 ngx_int_t |
15 ngx_shm_alloc(ngx_shm_t *shm) | |
358
0a03c921c81d
nginx-0.0.7-2004-06-17-21:18:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
16 { |
639 | 17 shm->addr = (u_char *) mmap(NULL, shm->size, |
18 PROT_READ|PROT_WRITE, | |
19 MAP_ANON|MAP_SHARED, -1, 0); | |
358
0a03c921c81d
nginx-0.0.7-2004-06-17-21:18:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
20 |
605 | 21 if (shm->addr == MAP_FAILED) { |
22 ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno, | |
23 "mmap(MAP_ANON|MAP_SHARED, %uz) failed", shm->size); | |
24 return NGX_ERROR; | |
358
0a03c921c81d
nginx-0.0.7-2004-06-17-21:18:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
25 } |
0a03c921c81d
nginx-0.0.7-2004-06-17-21:18:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
26 |
605 | 27 return NGX_OK; |
28 } | |
29 | |
30 | |
31 void | |
32 ngx_shm_free(ngx_shm_t *shm) | |
33 { | |
639 | 34 if (munmap((void *) shm->addr, shm->size) == -1) { |
605 | 35 ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno, |
36 "munmap(%p, %uz) failed", shm->addr, shm->size); | |
37 } | |
358
0a03c921c81d
nginx-0.0.7-2004-06-17-21:18:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
38 } |
0a03c921c81d
nginx-0.0.7-2004-06-17-21:18:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
39 |
469 | 40 #elif (NGX_HAVE_MAP_DEVZERO) |
358
0a03c921c81d
nginx-0.0.7-2004-06-17-21:18:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
41 |
605 | 42 ngx_int_t |
43 ngx_shm_alloc(ngx_shm_t *shm) | |
358
0a03c921c81d
nginx-0.0.7-2004-06-17-21:18:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
44 { |
605 | 45 ngx_fd_t fd; |
358
0a03c921c81d
nginx-0.0.7-2004-06-17-21:18:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
46 |
0a03c921c81d
nginx-0.0.7-2004-06-17-21:18:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
47 fd = open("/dev/zero", O_RDWR); |
0a03c921c81d
nginx-0.0.7-2004-06-17-21:18:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
48 |
0a03c921c81d
nginx-0.0.7-2004-06-17-21:18:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
49 if (fd == -1) { |
605 | 50 ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno, |
467 | 51 "open(\"/dev/zero\") failed"); |
605 | 52 return NGX_ERROR; |
358
0a03c921c81d
nginx-0.0.7-2004-06-17-21:18:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
53 } |
0a03c921c81d
nginx-0.0.7-2004-06-17-21:18:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
54 |
639 | 55 shm->addr = (u_char *) mmap(NULL, shm->size, PROT_READ|PROT_WRITE, |
56 MAP_SHARED, fd, 0); | |
358
0a03c921c81d
nginx-0.0.7-2004-06-17-21:18:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
57 |
605 | 58 if (shm->addr == MAP_FAILED) { |
59 ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno, | |
60 "mmap(/dev/zero, MAP_SHARED, %uz) failed", shm->size); | |
358
0a03c921c81d
nginx-0.0.7-2004-06-17-21:18:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
61 } |
0a03c921c81d
nginx-0.0.7-2004-06-17-21:18:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
62 |
0a03c921c81d
nginx-0.0.7-2004-06-17-21:18:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
63 if (close(fd) == -1) { |
605 | 64 ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno, |
467 | 65 "close(\"/dev/zero\") failed"); |
358
0a03c921c81d
nginx-0.0.7-2004-06-17-21:18:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
66 } |
0a03c921c81d
nginx-0.0.7-2004-06-17-21:18:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
67 |
605 | 68 return (shm->addr == MAP_FAILED) ? NGX_ERROR : NGX_OK; |
69 } | |
70 | |
71 | |
72 void | |
73 ngx_shm_free(ngx_shm_t *shm) | |
74 { | |
639 | 75 if (munmap((void *) shm->addr, shm->size) == -1) { |
605 | 76 ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno, |
77 "munmap(%p, %uz) failed", shm->addr, shm->size); | |
78 } | |
358
0a03c921c81d
nginx-0.0.7-2004-06-17-21:18:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
79 } |
0a03c921c81d
nginx-0.0.7-2004-06-17-21:18:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
80 |
469 | 81 #elif (NGX_HAVE_SYSVSHM) |
358
0a03c921c81d
nginx-0.0.7-2004-06-17-21:18:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
82 |
0a03c921c81d
nginx-0.0.7-2004-06-17-21:18:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
83 #include <sys/ipc.h> |
0a03c921c81d
nginx-0.0.7-2004-06-17-21:18:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
84 #include <sys/shm.h> |
0a03c921c81d
nginx-0.0.7-2004-06-17-21:18:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
85 |
0a03c921c81d
nginx-0.0.7-2004-06-17-21:18:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
86 |
605 | 87 ngx_int_t |
88 ngx_shm_alloc(ngx_shm_t *shm) | |
358
0a03c921c81d
nginx-0.0.7-2004-06-17-21:18:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
89 { |
605 | 90 int id; |
358
0a03c921c81d
nginx-0.0.7-2004-06-17-21:18:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
91 |
605 | 92 id = shmget(IPC_PRIVATE, shm->size, (SHM_R|SHM_W|IPC_CREAT)); |
358
0a03c921c81d
nginx-0.0.7-2004-06-17-21:18:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
93 |
0a03c921c81d
nginx-0.0.7-2004-06-17-21:18:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
94 if (id == -1) { |
605 | 95 ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno, |
96 "shmget(%uz) failed", shm->size); | |
97 return NGX_ERROR; | |
358
0a03c921c81d
nginx-0.0.7-2004-06-17-21:18:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
98 } |
0a03c921c81d
nginx-0.0.7-2004-06-17-21:18:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
99 |
605 | 100 ngx_log_debug1(NGX_LOG_DEBUG_CORE, shm->log, 0, "shmget id: %d", id); |
358
0a03c921c81d
nginx-0.0.7-2004-06-17-21:18:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
101 |
605 | 102 shm->addr = shmat(id, NULL, 0); |
103 | |
104 if (shm->addr == (void *) -1) { | |
105 ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno, "shmat() failed"); | |
358
0a03c921c81d
nginx-0.0.7-2004-06-17-21:18:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
106 } |
0a03c921c81d
nginx-0.0.7-2004-06-17-21:18:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
107 |
0a03c921c81d
nginx-0.0.7-2004-06-17-21:18:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
108 if (shmctl(id, IPC_RMID, NULL) == -1) { |
605 | 109 ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno, |
110 "shmctl(IPC_RMID) failed"); | |
358
0a03c921c81d
nginx-0.0.7-2004-06-17-21:18:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
111 } |
0a03c921c81d
nginx-0.0.7-2004-06-17-21:18:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
112 |
605 | 113 return (shm->addr == (void *) -1) ? NGX_ERROR : NGX_OK; |
114 } | |
115 | |
116 | |
117 void | |
118 ngx_shm_free(ngx_shm_t *shm) | |
119 { | |
120 if (shmdt(shm->addr) == -1) { | |
121 ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno, | |
122 "shmdt(%p) failed", shm->addr); | |
123 } | |
358
0a03c921c81d
nginx-0.0.7-2004-06-17-21:18:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
124 } |
0a03c921c81d
nginx-0.0.7-2004-06-17-21:18:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
125 |
0a03c921c81d
nginx-0.0.7-2004-06-17-21:18:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
126 #endif |