0
|
1
|
|
2 /*
|
|
3 * Copyright (C) Igor Sysoev
|
644
|
4 * Copyright (C) Nginx, Inc.
|
0
|
5 */
|
|
6
|
|
7
|
|
8 #include <ngx_config.h>
|
|
9 #include <ngx_core.h>
|
|
10 #include <ngx_event.h>
|
|
11
|
|
12
|
50
|
13 #define NGX_IOVS 16
|
|
14
|
|
15
|
18
|
16 #if (NGX_HAVE_KQUEUE)
|
0
|
17
|
50
|
18 ssize_t
|
|
19 ngx_readv_chain(ngx_connection_t *c, ngx_chain_t *chain)
|
0
|
20 {
|
|
21 u_char *prev;
|
|
22 ssize_t n, size;
|
|
23 ngx_err_t err;
|
50
|
24 ngx_array_t vec;
|
0
|
25 ngx_event_t *rev;
|
50
|
26 struct iovec *iov, iovs[NGX_IOVS];
|
0
|
27
|
126
|
28 rev = c->read;
|
0
|
29
|
4
|
30 if (ngx_event_flags & NGX_USE_KQUEUE_EVENT) {
|
0
|
31 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0,
|
|
32 "readv: eof:%d, avail:%d, err:%d",
|
|
33 rev->pending_eof, rev->available, rev->kq_errno);
|
|
34
|
|
35 if (rev->available == 0) {
|
136
|
36 if (rev->pending_eof) {
|
0
|
37 rev->ready = 0;
|
|
38 rev->eof = 1;
|
|
39
|
136
|
40 ngx_log_error(NGX_LOG_INFO, c->log, rev->kq_errno,
|
|
41 "kevent() reported about an closed connection");
|
|
42
|
0
|
43 if (rev->kq_errno) {
|
|
44 rev->error = 1;
|
|
45 ngx_set_socket_errno(rev->kq_errno);
|
136
|
46 return NGX_ERROR;
|
0
|
47 }
|
|
48
|
|
49 return 0;
|
136
|
50
|
|
51 } else {
|
|
52 return NGX_AGAIN;
|
0
|
53 }
|
|
54 }
|
|
55 }
|
|
56
|
|
57 prev = NULL;
|
|
58 iov = NULL;
|
|
59 size = 0;
|
|
60
|
50
|
61 vec.elts = iovs;
|
|
62 vec.nelts = 0;
|
|
63 vec.size = sizeof(struct iovec);
|
|
64 vec.nalloc = NGX_IOVS;
|
|
65 vec.pool = c->pool;
|
0
|
66
|
|
67 /* coalesce the neighbouring bufs */
|
|
68
|
|
69 while (chain) {
|
|
70 if (prev == chain->buf->last) {
|
|
71 iov->iov_len += chain->buf->end - chain->buf->last;
|
|
72
|
|
73 } else {
|
50
|
74 iov = ngx_array_push(&vec);
|
|
75 if (iov == NULL) {
|
|
76 return NGX_ERROR;
|
|
77 }
|
|
78
|
0
|
79 iov->iov_base = (void *) chain->buf->last;
|
|
80 iov->iov_len = chain->buf->end - chain->buf->last;
|
|
81 }
|
|
82
|
|
83 size += chain->buf->end - chain->buf->last;
|
|
84 prev = chain->buf->end;
|
|
85 chain = chain->next;
|
|
86 }
|
|
87
|
|
88 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0,
|
50
|
89 "readv: %d, last:%d", vec.nelts, iov->iov_len);
|
0
|
90
|
|
91 rev = c->read;
|
|
92
|
|
93 do {
|
50
|
94 n = readv(c->fd, (struct iovec *) vec.elts, vec.nelts);
|
0
|
95
|
|
96 if (n >= 0) {
|
4
|
97 if (ngx_event_flags & NGX_USE_KQUEUE_EVENT) {
|
0
|
98 rev->available -= n;
|
|
99
|
|
100 /*
|
136
|
101 * rev->available may be negative here because some additional
|
|
102 * bytes may be received between kevent() and recv()
|
0
|
103 */
|
|
104
|
|
105 if (rev->available <= 0) {
|
|
106 if (!rev->pending_eof) {
|
|
107 rev->ready = 0;
|
|
108 }
|
|
109
|
|
110 if (rev->available < 0) {
|
|
111 rev->available = 0;
|
|
112 }
|
|
113 }
|
|
114
|
154
|
115 if (n == 0) {
|
|
116
|
|
117 /*
|
|
118 * on FreeBSD recv() may return 0 on closed socket
|
|
119 * even if kqueue reported about available data
|
|
120 */
|
|
121
|
176
|
122 #if 0
|
154
|
123 ngx_log_error(NGX_LOG_ALERT, c->log, 0,
|
158
|
124 "readv() returned 0 while kevent() reported "
|
154
|
125 "%d available bytes", rev->available);
|
176
|
126 #endif
|
154
|
127
|
|
128 rev->eof = 1;
|
|
129 rev->available = 0;
|
|
130 }
|
|
131
|
0
|
132 return n;
|
|
133 }
|
|
134
|
|
135 if (n < size) {
|
|
136 rev->ready = 0;
|
|
137 }
|
|
138
|
|
139 if (n == 0) {
|
|
140 rev->eof = 1;
|
|
141 }
|
|
142
|
|
143 return n;
|
|
144 }
|
|
145
|
|
146 err = ngx_socket_errno;
|
|
147
|
|
148 if (err == NGX_EAGAIN || err == NGX_EINTR) {
|
|
149 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, err,
|
|
150 "readv() not ready");
|
|
151 n = NGX_AGAIN;
|
|
152
|
|
153 } else {
|
|
154 n = ngx_connection_error(c, err, "readv() failed");
|
|
155 break;
|
|
156 }
|
|
157
|
|
158 } while (err == NGX_EINTR);
|
|
159
|
|
160 rev->ready = 0;
|
|
161
|
582
|
162 if (n == NGX_ERROR) {
|
0
|
163 c->read->error = 1;
|
|
164 }
|
|
165
|
|
166 return n;
|
|
167 }
|
|
168
|
18
|
169 #else /* ! NGX_HAVE_KQUEUE */
|
0
|
170
|
50
|
171 ssize_t
|
|
172 ngx_readv_chain(ngx_connection_t *c, ngx_chain_t *chain)
|
0
|
173 {
|
|
174 u_char *prev;
|
|
175 ssize_t n, size;
|
|
176 ngx_err_t err;
|
50
|
177 ngx_array_t vec;
|
0
|
178 ngx_event_t *rev;
|
50
|
179 struct iovec *iov, iovs[NGX_IOVS];
|
0
|
180
|
|
181 prev = NULL;
|
|
182 iov = NULL;
|
|
183 size = 0;
|
|
184
|
50
|
185 vec.elts = iovs;
|
|
186 vec.nelts = 0;
|
|
187 vec.size = sizeof(struct iovec);
|
|
188 vec.nalloc = NGX_IOVS;
|
|
189 vec.pool = c->pool;
|
0
|
190
|
|
191 /* coalesce the neighbouring bufs */
|
|
192
|
|
193 while (chain) {
|
|
194 if (prev == chain->buf->last) {
|
|
195 iov->iov_len += chain->buf->end - chain->buf->last;
|
|
196
|
|
197 } else {
|
50
|
198 iov = ngx_array_push(&vec);
|
|
199 if (iov == NULL) {
|
|
200 return NGX_ERROR;
|
|
201 }
|
|
202
|
110
|
203 iov->iov_base = (void *) chain->buf->last;
|
0
|
204 iov->iov_len = chain->buf->end - chain->buf->last;
|
|
205 }
|
|
206
|
|
207 size += chain->buf->end - chain->buf->last;
|
|
208 prev = chain->buf->end;
|
|
209 chain = chain->next;
|
|
210 }
|
|
211
|
|
212 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0,
|
50
|
213 "readv: %d:%d", vec.nelts, iov->iov_len);
|
0
|
214
|
|
215 rev = c->read;
|
|
216
|
|
217 do {
|
50
|
218 n = readv(c->fd, (struct iovec *) vec.elts, vec.nelts);
|
0
|
219
|
|
220 if (n == 0) {
|
|
221 rev->ready = 0;
|
|
222 rev->eof = 1;
|
|
223
|
|
224 return n;
|
|
225
|
|
226 } else if (n > 0) {
|
|
227
|
4
|
228 if (n < size && !(ngx_event_flags & NGX_USE_GREEDY_EVENT)) {
|
0
|
229 rev->ready = 0;
|
|
230 }
|
|
231
|
|
232 return n;
|
|
233 }
|
|
234
|
|
235 err = ngx_socket_errno;
|
|
236
|
|
237 if (err == NGX_EAGAIN || err == NGX_EINTR) {
|
|
238 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, err,
|
|
239 "readv() not ready");
|
|
240 n = NGX_AGAIN;
|
|
241
|
|
242 } else {
|
|
243 n = ngx_connection_error(c, err, "readv() failed");
|
|
244 break;
|
|
245 }
|
|
246
|
|
247 } while (err == NGX_EINTR);
|
|
248
|
|
249 rev->ready = 0;
|
|
250
|
582
|
251 if (n == NGX_ERROR) {
|
0
|
252 c->read->error = 1;
|
|
253 }
|
|
254
|
|
255 return n;
|
|
256 }
|
|
257
|
18
|
258 #endif /* NGX_HAVE_KQUEUE */
|