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annotate src/os/unix/ngx_send.c @ 7668:0a04e5e4c40b

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Large block sizes on Linux are now ignored (ticket #1168). NFS on Linux is known to report wsize as a block size (in both f_bsize and f_frsize, both in statfs() and statvfs()). On the other hand, typical file system block sizes on Linux (ext2/ext3/ext4, XFS) are limited to pagesize. (With FAT, block sizes can be at least up to 512k in extreme cases, but this doesn't really matter, see below.) To avoid too aggressive cache clearing on NFS volumes on Linux, block sizes larger than pagesize are now ignored. Note that it is safe to ignore large block sizes. Since 3899:e7cd13b7f759 (1.0.1) cache size is calculated based on fstat() st_blocks, and rounding to file system block size is preserved mostly for Windows. Note well that on other OSes valid block sizes seen are at least up to 65536. In particular, UFS on FreeBSD is known to work well with block and fragment sizes set to 65536.
author Maxim Dounin <mdounin@mdounin.ru>
date Mon, 22 Jun 2020 18:02:58 +0300
parents f01ab2dbcfdc
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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: 419
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: 419
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
d620f497c50f Copyright updated.
Maxim Konovalov <maxim@nginx.com>
parents: 2719
diff changeset
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: 419
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: 419
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6
417
0526206251f6 nginx-0.0.10-2004-09-07-19:29:22 import
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7
0526206251f6 nginx-0.0.10-2004-09-07-19:29:22 import
Igor Sysoev <igor@sysoev.ru>
parents:
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8 #include <ngx_config.h>
0526206251f6 nginx-0.0.10-2004-09-07-19:29:22 import
Igor Sysoev <igor@sysoev.ru>
parents:
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9 #include <ngx_core.h>
0526206251f6 nginx-0.0.10-2004-09-07-19:29:22 import
Igor Sysoev <igor@sysoev.ru>
parents:
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10 #include <ngx_event.h>
0526206251f6 nginx-0.0.10-2004-09-07-19:29:22 import
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11
0526206251f6 nginx-0.0.10-2004-09-07-19:29:22 import
Igor Sysoev <igor@sysoev.ru>
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12
1682
85523506e427 style fix
Igor Sysoev <igor@sysoev.ru>
parents: 587
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13 ssize_t
85523506e427 style fix
Igor Sysoev <igor@sysoev.ru>
parents: 587
diff changeset
14 ngx_unix_send(ngx_connection_t *c, u_char *buf, size_t size)
417
0526206251f6 nginx-0.0.10-2004-09-07-19:29:22 import
Igor Sysoev <igor@sysoev.ru>
parents:
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15 {
0526206251f6 nginx-0.0.10-2004-09-07-19:29:22 import
Igor Sysoev <igor@sysoev.ru>
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16 ssize_t n;
0526206251f6 nginx-0.0.10-2004-09-07-19:29:22 import
Igor Sysoev <igor@sysoev.ru>
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17 ngx_err_t err;
0526206251f6 nginx-0.0.10-2004-09-07-19:29:22 import
Igor Sysoev <igor@sysoev.ru>
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18 ngx_event_t *wev;
0526206251f6 nginx-0.0.10-2004-09-07-19:29:22 import
Igor Sysoev <igor@sysoev.ru>
parents:
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19
0526206251f6 nginx-0.0.10-2004-09-07-19:29:22 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
20 wev = c->write;
0526206251f6 nginx-0.0.10-2004-09-07-19:29:22 import
Igor Sysoev <igor@sysoev.ru>
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21
469
2ff194b74f1e nginx-0.1.9-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 455
diff changeset
22 #if (NGX_HAVE_KQUEUE)
417
0526206251f6 nginx-0.0.10-2004-09-07-19:29:22 import
Igor Sysoev <igor@sysoev.ru>
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23
587
284cc140593b nginx-0.3.15-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 581
diff changeset
24 if ((ngx_event_flags & NGX_USE_KQUEUE_EVENT) && wev->pending_eof) {
537
c9ad0d9c7d59 nginx-0.1.43-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 509
diff changeset
25 (void) ngx_connection_error(c, wev->kq_errno,
c9ad0d9c7d59 nginx-0.1.43-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 509
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26 "kevent() reported about an closed connection");
417
0526206251f6 nginx-0.0.10-2004-09-07-19:29:22 import
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27 wev->error = 1;
0526206251f6 nginx-0.0.10-2004-09-07-19:29:22 import
Igor Sysoev <igor@sysoev.ru>
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28 return NGX_ERROR;
0526206251f6 nginx-0.0.10-2004-09-07-19:29:22 import
Igor Sysoev <igor@sysoev.ru>
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29 }
0526206251f6 nginx-0.0.10-2004-09-07-19:29:22 import
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30
0526206251f6 nginx-0.0.10-2004-09-07-19:29:22 import
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31 #endif
0526206251f6 nginx-0.0.10-2004-09-07-19:29:22 import
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32
0526206251f6 nginx-0.0.10-2004-09-07-19:29:22 import
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33 for ( ;; ) {
0526206251f6 nginx-0.0.10-2004-09-07-19:29:22 import
Igor Sysoev <igor@sysoev.ru>
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34 n = send(c->fd, buf, size, 0);
0526206251f6 nginx-0.0.10-2004-09-07-19:29:22 import
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35
0526206251f6 nginx-0.0.10-2004-09-07-19:29:22 import
Igor Sysoev <igor@sysoev.ru>
parents:
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36 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0,
6480
f01ab2dbcfdc Fixed logging.
Sergey Kandaurov <pluknet@nginx.com>
parents: 4412
diff changeset
37 "send: fd:%d %z of %uz", c->fd, n, size);
417
0526206251f6 nginx-0.0.10-2004-09-07-19:29:22 import
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38
0526206251f6 nginx-0.0.10-2004-09-07-19:29:22 import
Igor Sysoev <igor@sysoev.ru>
parents:
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39 if (n > 0) {
0526206251f6 nginx-0.0.10-2004-09-07-19:29:22 import
Igor Sysoev <igor@sysoev.ru>
parents:
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40 if (n < (ssize_t) size) {
0526206251f6 nginx-0.0.10-2004-09-07-19:29:22 import
Igor Sysoev <igor@sysoev.ru>
parents:
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41 wev->ready = 0;
0526206251f6 nginx-0.0.10-2004-09-07-19:29:22 import
Igor Sysoev <igor@sysoev.ru>
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42 }
0526206251f6 nginx-0.0.10-2004-09-07-19:29:22 import
Igor Sysoev <igor@sysoev.ru>
parents:
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43
2719
9237cf8b400b update c->sent in ngx_unix_send()
Igor Sysoev <igor@sysoev.ru>
parents: 1682
diff changeset
44 c->sent += n;
9237cf8b400b update c->sent in ngx_unix_send()
Igor Sysoev <igor@sysoev.ru>
parents: 1682
diff changeset
45
417
0526206251f6 nginx-0.0.10-2004-09-07-19:29:22 import
Igor Sysoev <igor@sysoev.ru>
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46 return n;
0526206251f6 nginx-0.0.10-2004-09-07-19:29:22 import
Igor Sysoev <igor@sysoev.ru>
parents:
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47 }
0526206251f6 nginx-0.0.10-2004-09-07-19:29:22 import
Igor Sysoev <igor@sysoev.ru>
parents:
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48
0526206251f6 nginx-0.0.10-2004-09-07-19:29:22 import
Igor Sysoev <igor@sysoev.ru>
parents:
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49 err = ngx_socket_errno;
0526206251f6 nginx-0.0.10-2004-09-07-19:29:22 import
Igor Sysoev <igor@sysoev.ru>
parents:
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50
0526206251f6 nginx-0.0.10-2004-09-07-19:29:22 import
Igor Sysoev <igor@sysoev.ru>
parents:
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51 if (n == 0) {
0526206251f6 nginx-0.0.10-2004-09-07-19:29:22 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
52 ngx_log_error(NGX_LOG_ALERT, c->log, err, "send() returned zero");
419
47709bff4468 nginx-0.0.10-2004-09-09-19:40:48 import
Igor Sysoev <igor@sysoev.ru>
parents: 417
diff changeset
53 wev->ready = 0;
47709bff4468 nginx-0.0.10-2004-09-09-19:40:48 import
Igor Sysoev <igor@sysoev.ru>
parents: 417
diff changeset
54 return n;
417
0526206251f6 nginx-0.0.10-2004-09-07-19:29:22 import
Igor Sysoev <igor@sysoev.ru>
parents:
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55 }
0526206251f6 nginx-0.0.10-2004-09-07-19:29:22 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
56
0526206251f6 nginx-0.0.10-2004-09-07-19:29:22 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
57 if (err == NGX_EAGAIN || err == NGX_EINTR) {
0526206251f6 nginx-0.0.10-2004-09-07-19:29:22 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
58 wev->ready = 0;
0526206251f6 nginx-0.0.10-2004-09-07-19:29:22 import
Igor Sysoev <igor@sysoev.ru>
parents:
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59
0526206251f6 nginx-0.0.10-2004-09-07-19:29:22 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
60 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, err,
0526206251f6 nginx-0.0.10-2004-09-07-19:29:22 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
61 "send() not ready");
0526206251f6 nginx-0.0.10-2004-09-07-19:29:22 import
Igor Sysoev <igor@sysoev.ru>
parents:
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62
0526206251f6 nginx-0.0.10-2004-09-07-19:29:22 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
63 if (err == NGX_EAGAIN) {
0526206251f6 nginx-0.0.10-2004-09-07-19:29:22 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
64 return NGX_AGAIN;
0526206251f6 nginx-0.0.10-2004-09-07-19:29:22 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
65 }
0526206251f6 nginx-0.0.10-2004-09-07-19:29:22 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
66
0526206251f6 nginx-0.0.10-2004-09-07-19:29:22 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
67 } else {
0526206251f6 nginx-0.0.10-2004-09-07-19:29:22 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
68 wev->error = 1;
537
c9ad0d9c7d59 nginx-0.1.43-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 509
diff changeset
69 (void) ngx_connection_error(c, err, "send() failed");
417
0526206251f6 nginx-0.0.10-2004-09-07-19:29:22 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
70 return NGX_ERROR;
0526206251f6 nginx-0.0.10-2004-09-07-19:29:22 import
Igor Sysoev <igor@sysoev.ru>
parents:
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71 }
0526206251f6 nginx-0.0.10-2004-09-07-19:29:22 import
Igor Sysoev <igor@sysoev.ru>
parents:
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72 }
0526206251f6 nginx-0.0.10-2004-09-07-19:29:22 import
Igor Sysoev <igor@sysoev.ru>
parents:
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73 }