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worker.cfa @ 96de72b

Last change on this file since 96de72b was 0f1336c, checked in by Thierry Delisle <tdelisle@…>, 2 years ago
Minor error handling improvement.
Property mode set to `100644`
File size: 10.8 KB

Line
1	#include "worker.hfa"
2
3	#include <errno.h>
4	#include <stdio.h>
5	#include <string.h>
6	#include <unistd.h>
7
8	#include <fstream.hfa>
9	#include <iofwd.hfa>
10	#include <mutex_stmt.hfa>
11
12	#include "options.hfa"
13	#include "protocol.hfa"
14	#include "filecache.hfa"
15
16	static const unsigned long long period = 5_000_000;
17
18	//=============================================================================================
19	// Generic connection handling
20	//=============================================================================================
21	static void handle_connection( connection & this, volatile int & fd, char * buffer, size_t len, io_future_t * f, unsigned long long & last ) {
22	REQUEST:
23	for() {
24	bool closed;
25	HttpCode code;
26	const char * file;
27	size_t name_size;
28
29	// Read the http request
30	if( options.log ) mutex(sout) sout \| "=== Reading request ===";
31	[code, closed, file, name_size] = http_read(fd, buffer, len, f);
32	f = 0p;
33
34	// if we are done, break out of the loop
35	if( closed ) {
36	if( code != OK200 ) this.stats.sendfile.error++;
37	break REQUEST;
38	}
39
40	// If this wasn't a request retrun 400
41	if( code != OK200 ) {
42	abort \| "=== Invalid Request :" \| code_val(code) \| "===";
43	// answer_error(fd, code);
44	// continue REQUEST;
45	}
46
47	// if(0 == strncmp(file, "plaintext", min(name_size, sizeof("plaintext") ))) {
48	// if( options.log ) mutex(sout) sout \| "=== Request for /plaintext ===";
49
50	// int ret = answer_plaintext(fd);
51	// if( ret == -ECONNRESET ) { this.stats.sendfile.error++; break REQUEST; }
52
53	// if( options.log ) mutex(sout) sout \| "=== Answer sent ===";
54	// continue REQUEST;
55	// }
56
57	// if(0 == strncmp(file, "ping", min(name_size, sizeof("ping") ))) {
58	// if( options.log ) mutex(sout) sout \| "=== Request for /ping ===";
59
60	// // Send the header
61	// int ret = answer_empty(fd);
62	// if( ret == -ECONNRESET ) { this.stats.sendfile.error++; break REQUEST; }
63
64	// if( options.log ) mutex(sout) sout \| "=== Answer sent ===";
65	// continue REQUEST;
66	// }
67
68	if( options.log ) {
69	sout \| "=== Request for file " \| nonl;
70	write(sout, file, name_size);
71	sout \| " ===";
72	}
73
74	if( !options.file_cache.path ) {
75	// if( options.log ) {
76	serr \| "=== File Not Found (" \| nonl;
77	write(serr, file, name_size);
78	serr \| ") ===";
79	abort();
80	// }
81	// answer_error(fd, E405);
82	// continue REQUEST;
83	}
84
85	// Get the fd from the file cache
86	int ans_fd;
87	size_t count;
88	[ans_fd, count] = get_file( file, name_size );
89
90	// If we can't find the file, return 404
91	if( ans_fd < 0 ) {
92	// if( options.log ) {
93	serr \| "=== File Not Found 2 (" \| nonl;
94	write(serr, file, name_size);
95	serr \| ") ===";
96	abort();
97	// }
98	// answer_error(fd, E404);
99	// continue REQUEST;
100	}
101
102	// Send the desired file
103	int ret = answer_sendfile( this.pipe, fd, ans_fd, count, this.stats.sendfile );
104	if(ret < 0) {
105	if( ret == -ECONNABORTED ) { this.stats.sendfile.error++; break REQUEST; }
106	if( ret == -ECONNRESET ) { this.stats.sendfile.error++; break REQUEST; }
107	if( ret == -EPIPE ) { this.stats.sendfile.error++; break REQUEST; }
108	if( ret == -EBADF ) { this.stats.sendfile.error++; break REQUEST; }
109	abort( "answer sendfile error: %d (%d) %s\n", ret, (int)errno, strerror(errno) );
110	}
111
112	if( options.log ) mutex(sout) sout \| "=== Answer sent ===";
113	}
114
115	this.stats.sendfile.close++;
116
117	if (stats_thrd) {
118	// unsigned long long next = rdtscl();
119	// if(next > (last + period)) {
120	if(try_lock(stats_thrd->stats.lock __cfaabi_dbg_ctx2)) {
121	push(this.stats.sendfile, stats_thrd->stats.send);
122	unlock(stats_thrd->stats.lock);
123	// last = next;
124	}
125	// }
126	}
127	}
128
129	//=============================================================================================
130	// Self Accepting Worker Thread
131	//=============================================================================================
132	void ?{}( AcceptWorker & this ) {
133	size_t cli = rand() % options.clopts.cltr_cnt;
134	((thread&)this){ "Server Worker Thread", *options.clopts.instance[cli], 64000 };
135	options.clopts.thrd_cnt[cli]++;
136	this.done = false;
137	}
138
139	void main( AcceptWorker & this ) {
140	park();
141	unsigned long long last = rdtscl();
142	/* paranoid */ assert( this.conn.pipe[0] != -1 );
143	/* paranoid */ assert( this.conn.pipe[1] != -1 );
144	for() {
145	if( options.log ) mutex(sout) sout \| "=== Accepting connection ===";
146	int fd = cfa_accept4( this.sockfd, this.[addr, addrlen, flags], CFA_IO_LAZY );
147	if(fd <= 0) {
148	if( errno == ECONNABORTED ) break;
149	if( this.done && (errno == EINVAL \|\| errno == EBADF) ) break;
150	abort( "accept error %d: (%d) %s\n", fd, (int)errno, strerror(errno) );
151	}
152	if(this.done) break;
153
154	this.stats.accepts++;
155	if (stats_thrd && try_lock(stats_thrd->stats.lock)) {
156	push(this.stats, stats_thrd->stats.accpt);
157	unlock(stats_thrd->stats.lock);
158	}
159
160	if( options.log ) mutex(sout) sout \| "=== New connection" \| fd \| "" \| ", waiting for requests ===";
161	size_t len = options.socket.buflen;
162	char buffer[len];
163	handle_connection( this.conn, fd, buffer, len, 0p, last );
164	this.conn.stats.sendfile.maxfd = max(this.conn.stats.sendfile.maxfd, fd);
165
166	if( options.log ) mutex(sout) sout \| "=== Connection closed ===";
167	}
168	}
169
170
171	//=============================================================================================
172	// Channel Worker Thread
173	//=============================================================================================
174	void ?{}( ChannelWorker & this ) {
175	size_t cli = rand() % options.clopts.cltr_cnt;
176	((thread&)this){ "Server Worker Thread", *options.clopts.instance[cli], 64000 };
177	options.clopts.thrd_cnt[cli]++;
178	this.done = false;
179	}
180
181	void main( ChannelWorker & this ) {
182	park();
183	unsigned long long last = rdtscl();
184	/* paranoid */ assert( this.conn.pipe[0] != -1 );
185	/* paranoid */ assert( this.conn.pipe[1] != -1 );
186	this.conn.stats.sendfile.maxfd = max(this.conn.pipe[0], this.conn.pipe[1]);
187	// this.conn.stats.sendfile.maxfd = 0;
188	for() {
189	size_t len = options.socket.buflen;
190	char buffer[len];
191	PendingRead p;
192	p.next = 0p;
193	p.in.buf = (void*)buffer;
194	p.in.len = len;
195	push(*this.queue, &p);
196
197	if( options.log ) mutex(sout) sout \| "=== Waiting new connection ===";
198	handle_connection( this.conn, p.out.fd, buffer, len, &p.f, last );
199	if(this.done) break;
200	this.conn.stats.sendfile.maxfd = max(this.conn.stats.sendfile.maxfd, p.out.fd);
201	this.conn.stats.sendfile.close++;
202
203	if( options.log ) mutex(sout) sout \| "=== Connection closed ===";
204	}
205
206	lock(stats_thrd->stats.lock __cfaabi_dbg_ctx2);
207	push(this.conn.stats.sendfile, stats_thrd->stats.send);
208	unlock(stats_thrd->stats.lock);
209	}
210
211	extern "C" {
212	extern int accept4(int sockfd, struct sockaddr addr, socklen_t addrlen, int flags);
213	}
214
215	void ?{}( Acceptor & this, int cli ) {
216	((thread&)this){ "Server Acceptor Thread", *options.clopts.instance[cli], 64000 };
217	options.clopts.thrd_cnt[cli]++;
218	this.done = false;
219	}
220
221	static inline __s32 get_res( io_future_t & this ) {
222	if( this.result < 0 ) {{
223	errno = -this.result;
224	return -1;
225	}}
226	return this.result;
227	}
228
229	static inline void push_connection( Acceptor & this, int fd ) {
230	this.stats.accepts++;
231	PendingRead * p = 0p;
232	for() {
233	if(this.done) return;
234	p = pop(*this.queue);
235	if(p) break;
236	// abort( "Too few threads" );
237	yield();
238	this.stats.creates++;
239	};
240
241	p->out.fd = fd;
242	async_recv(p->f, p->out.fd, p->in.buf, p->in.len, 0, CFA_IO_LAZY);
243	}
244
245	// #define ACCEPT_SPIN
246	#define ACCEPT_ONE
247	// #define ACCEPT_MANY
248
249	void main( Acceptor & this ) {
250	park();
251	unsigned long long last = rdtscl();
252
253	#if defined(ACCEPT_SPIN)
254	if( options.log ) sout \| "=== Accepting connection ===";
255	for() {
256	int fd = accept4(this.sockfd, this.[addr, addrlen, flags]);
257	if(fd < 0) {
258	if( errno == EWOULDBLOCK) {
259	this.stats.eagains++;
260	yield();
261	continue;
262	}
263	if( errno == ECONNABORTED ) break;
264	if( this.done && (errno == EINVAL \|\| errno == EBADF) ) break;
265	abort( "accept error: (%d) %s\n", (int)errno, strerror(errno) );
266	}
267
268	if(this.done) return;
269
270	if( options.log ) sout \| "=== New connection" \| fd \| "" \| ", waiting for requests ===";
271
272	if(fd) push_connection(this, fd);
273
274	if (stats_thrd) {
275	unsigned long long next = rdtscl();
276	if(next > (last + period)) {
277	if(try_lock(stats_thrd->stats.lock)) {
278	push(this.stats, stats_thrd->stats.accpt);
279	unlock(stats_thrd->stats.lock);
280	last = next;
281	}
282	}
283	}
284
285	if( options.log ) sout \| "=== Accepting connection ===";
286	}
287
288	#elif defined(ACCEPT_ONE)
289	if( options.log ) sout \| "=== Accepting connection ===";
290	for() {
291	int fd = cfa_accept4(this.sockfd, this.[addr, addrlen, flags], 0);
292	if(fd < 0) {
293	if( errno == ECONNABORTED ) break;
294	if( this.done && (errno == EINVAL \|\| errno == EBADF) ) break;
295	abort( "accept error: (%d) %s\n", (int)errno, strerror(errno) );
296	}
297
298	if(this.done) return;
299
300	if( options.log ) sout \| "=== New connection" \| fd \| "" \| ", waiting for requests ===";
301
302	if(fd) push_connection(this, fd);
303
304	if (stats_thrd) {
305	// unsigned long long next = rdtscl();
306	// if(next > (last + period)) {
307	if(try_lock(stats_thrd->stats.lock)) {
308	push(this.stats, stats_thrd->stats.accpt);
309	unlock(stats_thrd->stats.lock);
310	// last = next;
311	}
312	// }
313	}
314
315	if( options.log ) sout \| "=== Accepting connection ===";
316	}
317
318	#elif defined(ACCEPT_MANY)
319	const int nacc = 10;
320	io_future_t results[nacc];
321
322	for(i; nacc) {
323	io_future_t & res = results[i];
324	reset(res);
325	/* paranoid */ assert(!available(res));
326	if( options.log ) mutex(sout) sout \| "=== Re-arming accept no" \| i \| " ===";
327	async_accept4(res, this.sockfd, this.[addr, addrlen, flags], CFA_IO_LAZY);
328	}
329
330	for() {
331	if (stats_thrd) {
332	unsigned long long next = rdtscl();
333	if(next > (last + period)) {
334	if(try_lock(stats_thrd->stats.lock __cfaabi_dbg_ctx2)) {
335	push(this.stats, stats_thrd->stats.accpt);
336	unlock(stats_thrd->stats.lock);
337	last = next;
338	}
339	}
340	}
341
342	for(i; nacc) {
343	io_future_t & res = results[i];
344	if(available(res)) {
345	if( options.log ) mutex(sout) sout \| "=== Accept no " \| i \| "completed with result" \| res.result \| "===";
346	int fd = get_res(res);
347	reset(res);
348	if(fd < 0) {
349	if( errno == ECONNABORTED ) continue;
350	if( this.done && (errno == EINVAL \|\| errno == EBADF) ) continue;
351	abort( "accept error: (%d) %s\n", (int)errno, strerror(errno) );
352	}
353	push_connection( this, fd );
354
355	/* paranoid */ assert(!available(res));
356	if( options.log ) mutex(sout) sout \| "=== Re-arming accept no" \| i \| " ===";
357	async_accept4(res, this.sockfd, this.[addr, addrlen, flags], CFA_IO_LAZY);
358	}
359	}
360	if(this.done) return;
361
362	if( options.log ) mutex(sout) sout \| "=== Waiting for any accept ===";
363	this.stats.eagains++;
364	wait_any(results, nacc);
365
366	if( options.log ) mutex(sout) {
367	sout \| "=== Acceptor wake-up ===";
368	for(i; nacc) {
369	io_future_t & res = results[i];
370	sout \| i \| "available:" \| available(res);
371	}
372	}
373
374	}
375
376	for(i; nacc) {
377	wait(results[i]);
378	}
379	#else
380	#error no accept algorithm specified
381	#endif
382	lock(stats_thrd->stats.lock);
383	push(this.stats, stats_thrd->stats.accpt);
384	unlock(stats_thrd->stats.lock);
385	}

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