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server: fix 32-bit build warning
[fio.git] / server.c
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CommitLineData
1#include <stdio.h>
2#include <stdlib.h>
3#include <stdarg.h>
4#include <unistd.h>
5#include <limits.h>
6#include <errno.h>
7#include <fcntl.h>
8#include <sys/poll.h>
9#include <sys/types.h>
10#include <sys/wait.h>
11#include <sys/socket.h>
12#include <sys/stat.h>
13#include <sys/un.h>
14#include <netinet/in.h>
15#include <arpa/inet.h>
16#include <netdb.h>
17#include <syslog.h>
18#include <signal.h>
19#include <zlib.h>
20
21#include "fio.h"
22#include "server.h"
23#include "crc/crc16.h"
24#include "lib/ieee754.h"
25
26int fio_net_port = FIO_NET_PORT;
27
28int exit_backend = 0;
29
30static int server_fd = -1;
31static char *fio_server_arg;
32static char *bind_sock;
33static struct sockaddr_in saddr_in;
34static struct sockaddr_in6 saddr_in6;
35static int use_ipv6;
36
37struct fio_fork_item {
38 struct flist_head list;
39 int exitval;
40 int signal;
41 int exited;
42 pid_t pid;
43};
44
45/* Created on fork on new connection */
46static FLIST_HEAD(conn_list);
47
48/* Created on job fork from connection */
49static FLIST_HEAD(job_list);
50
51static const char *fio_server_ops[FIO_NET_CMD_NR] = {
52 "",
53 "QUIT",
54 "EXIT",
55 "JOB",
56 "JOBLINE",
57 "TEXT",
58 "TS",
59 "GS",
60 "SEND_ETA",
61 "ETA",
62 "PROBE",
63 "START",
64 "STOP",
65 "DISK_UTIL",
66 "SERVER_START",
67 "ADD_JOB",
68 "CMD_RUN"
69 "CMD_IOLOG",
70};
71
72const char *fio_server_op(unsigned int op)
73{
74 static char buf[32];
75
76 if (op < FIO_NET_CMD_NR)
77 return fio_server_ops[op];
78
79 sprintf(buf, "UNKNOWN/%d", op);
80 return buf;
81}
82
83static ssize_t iov_total_len(const struct iovec *iov, int count)
84{
85 ssize_t ret = 0;
86
87 while (count--) {
88 ret += iov->iov_len;
89 iov++;
90 }
91
92 return ret;
93}
94
95static int fio_sendv_data(int sk, struct iovec *iov, int count)
96{
97 ssize_t total_len = iov_total_len(iov, count);
98 ssize_t ret;
99
100 do {
101 ret = writev(sk, iov, count);
102 if (ret > 0) {
103 total_len -= ret;
104 if (!total_len)
105 break;
106
107 while (ret) {
108 if (ret >= iov->iov_len) {
109 ret -= iov->iov_len;
110 iov++;
111 continue;
112 }
113 iov->iov_base += ret;
114 iov->iov_len -= ret;
115 ret = 0;
116 }
117 } else if (!ret)
118 break;
119 else if (errno == EAGAIN || errno == EINTR)
120 continue;
121 else
122 break;
123 } while (!exit_backend);
124
125 if (!total_len)
126 return 0;
127
128 if (errno)
129 return -errno;
130
131 return 1;
132}
133
134int fio_send_data(int sk, const void *p, unsigned int len)
135{
136 struct iovec iov = { .iov_base = (void *) p, .iov_len = len };
137
138 assert(len <= sizeof(struct fio_net_cmd) + FIO_SERVER_MAX_FRAGMENT_PDU);
139
140 return fio_sendv_data(sk, &iov, 1);
141}
142
143int fio_recv_data(int sk, void *p, unsigned int len)
144{
145 do {
146 int ret = recv(sk, p, len, MSG_WAITALL);
147
148 if (ret > 0) {
149 len -= ret;
150 if (!len)
151 break;
152 p += ret;
153 continue;
154 } else if (!ret)
155 break;
156 else if (errno == EAGAIN || errno == EINTR)
157 continue;
158 else
159 break;
160 } while (!exit_backend);
161
162 if (!len)
163 return 0;
164
165 return -1;
166}
167
168static int verify_convert_cmd(struct fio_net_cmd *cmd)
169{
170 uint16_t crc;
171
172 cmd->cmd_crc16 = le16_to_cpu(cmd->cmd_crc16);
173 cmd->pdu_crc16 = le16_to_cpu(cmd->pdu_crc16);
174
175 crc = fio_crc16(cmd, FIO_NET_CMD_CRC_SZ);
176 if (crc != cmd->cmd_crc16) {
177 log_err("fio: server bad crc on command (got %x, wanted %x)\n",
178 cmd->cmd_crc16, crc);
179 return 1;
180 }
181
182 cmd->version = le16_to_cpu(cmd->version);
183 cmd->opcode = le16_to_cpu(cmd->opcode);
184 cmd->flags = le32_to_cpu(cmd->flags);
185 cmd->tag = le64_to_cpu(cmd->tag);
186 cmd->pdu_len = le32_to_cpu(cmd->pdu_len);
187
188 switch (cmd->version) {
189 case FIO_SERVER_VER:
190 break;
191 default:
192 log_err("fio: bad server cmd version %d\n", cmd->version);
193 return 1;
194 }
195
196 if (cmd->pdu_len > FIO_SERVER_MAX_FRAGMENT_PDU) {
197 log_err("fio: command payload too large: %u\n", cmd->pdu_len);
198 return 1;
199 }
200
201 return 0;
202}
203
204/*
205 * Read (and defragment, if necessary) incoming commands
206 */
207struct fio_net_cmd *fio_net_recv_cmd(int sk)
208{
209 struct fio_net_cmd cmd, *cmdret = NULL;
210 size_t cmd_size = 0, pdu_offset = 0;
211 uint16_t crc;
212 int ret, first = 1;
213 void *pdu = NULL;
214
215 do {
216 ret = fio_recv_data(sk, &cmd, sizeof(cmd));
217 if (ret)
218 break;
219
220 /* We have a command, verify it and swap if need be */
221 ret = verify_convert_cmd(&cmd);
222 if (ret)
223 break;
224
225 if (first) {
226 /* if this is text, add room for \0 at the end */
227 cmd_size = sizeof(cmd) + cmd.pdu_len + 1;
228 assert(!cmdret);
229 } else
230 cmd_size += cmd.pdu_len;
231
232 cmdret = realloc(cmdret, cmd_size);
233
234 if (first)
235 memcpy(cmdret, &cmd, sizeof(cmd));
236 else if (cmdret->opcode != cmd.opcode) {
237 log_err("fio: fragment opcode mismatch (%d != %d)\n",
238 cmdret->opcode, cmd.opcode);
239 ret = 1;
240 break;
241 }
242
243 if (!cmd.pdu_len)
244 break;
245
246 /* There's payload, get it */
247 pdu = (void *) cmdret->payload + pdu_offset;
248 ret = fio_recv_data(sk, pdu, cmd.pdu_len);
249 if (ret)
250 break;
251
252 /* Verify payload crc */
253 crc = fio_crc16(pdu, cmd.pdu_len);
254 if (crc != cmd.pdu_crc16) {
255 log_err("fio: server bad crc on payload ");
256 log_err("(got %x, wanted %x)\n", cmd.pdu_crc16, crc);
257 ret = 1;
258 break;
259 }
260
261 pdu_offset += cmd.pdu_len;
262 if (!first)
263 cmdret->pdu_len += cmd.pdu_len;
264 first = 0;
265 } while (cmd.flags & FIO_NET_CMD_F_MORE);
266
267 if (ret) {
268 free(cmdret);
269 cmdret = NULL;
270 } else if (cmdret) {
271 /* zero-terminate text input */
272 if (cmdret->pdu_len) {
273 if (cmdret->opcode == FIO_NET_CMD_TEXT) {
274 struct cmd_text_pdu *pdu = (struct cmd_text_pdu *) cmdret->payload;
275 char *buf = (char *) pdu->buf;
276
277 buf[pdu->buf_len] = '\0';
278 } else if (cmdret->opcode == FIO_NET_CMD_JOB) {
279 struct cmd_job_pdu *pdu = (struct cmd_job_pdu *) cmdret->payload;
280 char *buf = (char *) pdu->buf;
281 int len = le32_to_cpu(pdu->buf_len);
282
283 buf[len] = '\0';
284 }
285 }
286
287 /* frag flag is internal */
288 cmdret->flags &= ~FIO_NET_CMD_F_MORE;
289 }
290
291 return cmdret;
292}
293
294static void add_reply(uint64_t tag, struct flist_head *list)
295{
296 struct fio_net_cmd_reply *reply;
297
298 reply = (struct fio_net_cmd_reply *) (uintptr_t) tag;
299 flist_add_tail(&reply->list, list);
300}
301
302static uint64_t alloc_reply(uint64_t tag, uint16_t opcode)
303{
304 struct fio_net_cmd_reply *reply;
305
306 reply = calloc(1, sizeof(*reply));
307 INIT_FLIST_HEAD(&reply->list);
308 gettimeofday(&reply->tv, NULL);
309 reply->saved_tag = tag;
310 reply->opcode = opcode;
311
312 return (uintptr_t) reply;
313}
314
315static void free_reply(uint64_t tag)
316{
317 struct fio_net_cmd_reply *reply;
318
319 reply = (struct fio_net_cmd_reply *) (uintptr_t) tag;
320 free(reply);
321}
322
323void fio_net_cmd_crc_pdu(struct fio_net_cmd *cmd, const void *pdu)
324{
325 uint32_t pdu_len;
326
327 cmd->cmd_crc16 = __cpu_to_le16(fio_crc16(cmd, FIO_NET_CMD_CRC_SZ));
328
329 pdu_len = le32_to_cpu(cmd->pdu_len);
330 cmd->pdu_crc16 = __cpu_to_le16(fio_crc16(pdu, pdu_len));
331}
332
333void fio_net_cmd_crc(struct fio_net_cmd *cmd)
334{
335 fio_net_cmd_crc_pdu(cmd, cmd->payload);
336}
337
338int fio_net_send_cmd(int fd, uint16_t opcode, const void *buf, off_t size,
339 uint64_t *tagptr, struct flist_head *list)
340{
341 struct fio_net_cmd *cmd = NULL;
342 size_t this_len, cur_len = 0;
343 uint64_t tag;
344 int ret;
345
346 if (list) {
347 assert(tagptr);
348 tag = *tagptr = alloc_reply(*tagptr, opcode);
349 } else
350 tag = tagptr ? *tagptr : 0;
351
352 do {
353 this_len = size;
354 if (this_len > FIO_SERVER_MAX_FRAGMENT_PDU)
355 this_len = FIO_SERVER_MAX_FRAGMENT_PDU;
356
357 if (!cmd || cur_len < sizeof(*cmd) + this_len) {
358 if (cmd)
359 free(cmd);
360
361 cur_len = sizeof(*cmd) + this_len;
362 cmd = malloc(cur_len);
363 }
364
365 fio_init_net_cmd(cmd, opcode, buf, this_len, tag);
366
367 if (this_len < size)
368 cmd->flags = __cpu_to_le32(FIO_NET_CMD_F_MORE);
369
370 fio_net_cmd_crc(cmd);
371
372 ret = fio_send_data(fd, cmd, sizeof(*cmd) + this_len);
373 size -= this_len;
374 buf += this_len;
375 } while (!ret && size);
376
377 if (list) {
378 if (ret)
379 free_reply(tag);
380 else
381 add_reply(tag, list);
382 }
383
384 if (cmd)
385 free(cmd);
386
387 return ret;
388}
389
390static int fio_net_send_simple_stack_cmd(int sk, uint16_t opcode, uint64_t tag)
391{
392 struct fio_net_cmd cmd;
393
394 fio_init_net_cmd(&cmd, opcode, NULL, 0, tag);
395 fio_net_cmd_crc(&cmd);
396
397 return fio_send_data(sk, &cmd, sizeof(cmd));
398}
399
400/*
401 * If 'list' is non-NULL, then allocate and store the sent command for
402 * later verification.
403 */
404int fio_net_send_simple_cmd(int sk, uint16_t opcode, uint64_t tag,
405 struct flist_head *list)
406{
407 int ret;
408
409 if (list)
410 tag = alloc_reply(tag, opcode);
411
412 ret = fio_net_send_simple_stack_cmd(sk, opcode, tag);
413 if (ret) {
414 if (list)
415 free_reply(tag);
416
417 return ret;
418 }
419
420 if (list)
421 add_reply(tag, list);
422
423 return 0;
424}
425
426int fio_net_send_quit(int sk)
427{
428 dprint(FD_NET, "server: sending quit\n");
429
430 return fio_net_send_simple_cmd(sk, FIO_NET_CMD_QUIT, 0, NULL);
431}
432
433static int fio_net_send_ack(int sk, struct fio_net_cmd *cmd, int error,
434 int signal)
435{
436 struct cmd_end_pdu epdu;
437 uint64_t tag = 0;
438
439 if (cmd)
440 tag = cmd->tag;
441
442 epdu.error = __cpu_to_le32(error);
443 epdu.signal = __cpu_to_le32(signal);
444 return fio_net_send_cmd(sk, FIO_NET_CMD_STOP, &epdu, sizeof(epdu), &tag, NULL);
445}
446
447int fio_net_send_stop(int sk, int error, int signal)
448{
449 dprint(FD_NET, "server: sending stop (%d, %d)\n", error, signal);
450 return fio_net_send_ack(sk, NULL, error, signal);
451}
452
453static void fio_server_add_fork_item(pid_t pid, struct flist_head *list)
454{
455 struct fio_fork_item *ffi;
456
457 ffi = malloc(sizeof(*ffi));
458 ffi->exitval = 0;
459 ffi->signal = 0;
460 ffi->exited = 0;
461 ffi->pid = pid;
462 flist_add_tail(&ffi->list, list);
463}
464
465static void fio_server_add_conn_pid(pid_t pid)
466{
467 dprint(FD_NET, "server: forked off connection job (pid=%u)\n", pid);
468 fio_server_add_fork_item(pid, &conn_list);
469}
470
471static void fio_server_add_job_pid(pid_t pid)
472{
473 dprint(FD_NET, "server: forked off job job (pid=%u)\n", pid);
474 fio_server_add_fork_item(pid, &job_list);
475}
476
477static void fio_server_check_fork_item(struct fio_fork_item *ffi)
478{
479 int ret, status;
480
481 ret = waitpid(ffi->pid, &status, WNOHANG);
482 if (ret < 0) {
483 if (errno == ECHILD) {
484 log_err("fio: connection pid %u disappeared\n", ffi->pid);
485 ffi->exited = 1;
486 } else
487 log_err("fio: waitpid: %s\n", strerror(errno));
488 } else if (ret == ffi->pid) {
489 if (WIFSIGNALED(status)) {
490 ffi->signal = WTERMSIG(status);
491 ffi->exited = 1;
492 }
493 if (WIFEXITED(status)) {
494 if (WEXITSTATUS(status))
495 ffi->exitval = WEXITSTATUS(status);
496 ffi->exited = 1;
497 }
498 }
499}
500
501static void fio_server_fork_item_done(struct fio_fork_item *ffi)
502{
503 dprint(FD_NET, "pid %u exited, sig=%u, exitval=%d\n", ffi->pid, ffi->signal, ffi->exitval);
504
505 /*
506 * Fold STOP and QUIT...
507 */
508 fio_net_send_stop(server_fd, ffi->exitval, ffi->signal);
509 fio_net_send_quit(server_fd);
510 flist_del(&ffi->list);
511 free(ffi);
512}
513
514static void fio_server_check_fork_items(struct flist_head *list)
515{
516 struct flist_head *entry, *tmp;
517 struct fio_fork_item *ffi;
518
519 flist_for_each_safe(entry, tmp, list) {
520 ffi = flist_entry(entry, struct fio_fork_item, list);
521
522 fio_server_check_fork_item(ffi);
523
524 if (ffi->exited)
525 fio_server_fork_item_done(ffi);
526 }
527}
528
529static void fio_server_check_jobs(void)
530{
531 fio_server_check_fork_items(&job_list);
532}
533
534static void fio_server_check_conns(void)
535{
536 fio_server_check_fork_items(&conn_list);
537}
538
539static int handle_run_cmd(struct fio_net_cmd *cmd)
540{
541 pid_t pid;
542 int ret;
543
544 set_genesis_time();
545
546 pid = fork();
547 if (pid) {
548 fio_server_add_job_pid(pid);
549 return 0;
550 }
551
552 ret = fio_backend();
553 free_threads_shm();
554 _exit(ret);
555}
556
557static int handle_job_cmd(struct fio_net_cmd *cmd)
558{
559 struct cmd_job_pdu *pdu = (struct cmd_job_pdu *) cmd->payload;
560 void *buf = pdu->buf;
561 struct cmd_start_pdu spdu;
562
563 pdu->buf_len = le32_to_cpu(pdu->buf_len);
564 pdu->client_type = le32_to_cpu(pdu->client_type);
565
566 if (parse_jobs_ini(buf, 1, 0, pdu->client_type)) {
567 fio_net_send_quit(server_fd);
568 return -1;
569 }
570
571 spdu.jobs = cpu_to_le32(thread_number);
572 spdu.stat_outputs = cpu_to_le32(stat_number);
573 fio_net_send_cmd(server_fd, FIO_NET_CMD_START, &spdu, sizeof(spdu), NULL, NULL);
574 return 0;
575}
576
577static int handle_jobline_cmd(struct fio_net_cmd *cmd)
578{
579 void *pdu = cmd->payload;
580 struct cmd_single_line_pdu *cslp;
581 struct cmd_line_pdu *clp;
582 unsigned long offset;
583 struct cmd_start_pdu spdu;
584 char **argv;
585 int i;
586
587 clp = pdu;
588 clp->lines = le16_to_cpu(clp->lines);
589 clp->client_type = le16_to_cpu(clp->client_type);
590 argv = malloc(clp->lines * sizeof(char *));
591 offset = sizeof(*clp);
592
593 dprint(FD_NET, "server: %d command line args\n", clp->lines);
594
595 for (i = 0; i < clp->lines; i++) {
596 cslp = pdu + offset;
597 argv[i] = (char *) cslp->text;
598
599 offset += sizeof(*cslp) + le16_to_cpu(cslp->len);
600 dprint(FD_NET, "server: %d: %s\n", i, argv[i]);
601 }
602
603 if (parse_cmd_line(clp->lines, argv, clp->client_type)) {
604 fio_net_send_quit(server_fd);
605 free(argv);
606 return -1;
607 }
608
609 free(argv);
610
611 spdu.jobs = cpu_to_le32(thread_number);
612 spdu.stat_outputs = cpu_to_le32(stat_number);
613 fio_net_send_cmd(server_fd, FIO_NET_CMD_START, &spdu, sizeof(spdu), NULL, NULL);
614 return 0;
615}
616
617static int handle_probe_cmd(struct fio_net_cmd *cmd)
618{
619 struct cmd_probe_pdu probe;
620 uint64_t tag = cmd->tag;
621
622 dprint(FD_NET, "server: sending probe reply\n");
623
624 memset(&probe, 0, sizeof(probe));
625 gethostname((char *) probe.hostname, sizeof(probe.hostname));
626#ifdef CONFIG_BIG_ENDIAN
627 probe.bigendian = 1;
628#endif
629 strncpy((char *) probe.fio_version, fio_version_string, sizeof(probe.fio_version));
630
631 probe.os = FIO_OS;
632 probe.arch = FIO_ARCH;
633 probe.bpp = sizeof(void *);
634 probe.cpus = __cpu_to_le32(cpus_online());
635 probe.flags = 0;
636
637 return fio_net_send_cmd(server_fd, FIO_NET_CMD_PROBE, &probe, sizeof(probe), &tag, NULL);
638}
639
640static int handle_send_eta_cmd(struct fio_net_cmd *cmd)
641{
642 struct jobs_eta *je;
643 size_t size;
644 uint64_t tag = cmd->tag;
645 int i;
646
647 if (!thread_number)
648 return 0;
649
650 size = sizeof(*je) + thread_number * sizeof(char) + 1;
651 je = malloc(size);
652 memset(je, 0, size);
653
654 if (!calc_thread_status(je, 1)) {
655 free(je);
656 return 0;
657 }
658
659 dprint(FD_NET, "server sending status\n");
660
661 je->nr_running = cpu_to_le32(je->nr_running);
662 je->nr_ramp = cpu_to_le32(je->nr_ramp);
663 je->nr_pending = cpu_to_le32(je->nr_pending);
664 je->files_open = cpu_to_le32(je->files_open);
665
666 for (i = 0; i < DDIR_RWDIR_CNT; i++) {
667 je->m_rate[i] = cpu_to_le32(je->m_rate[i]);
668 je->t_rate[i] = cpu_to_le32(je->t_rate[i]);
669 je->m_iops[i] = cpu_to_le32(je->m_iops[i]);
670 je->t_iops[i] = cpu_to_le32(je->t_iops[i]);
671 je->rate[i] = cpu_to_le32(je->rate[i]);
672 je->iops[i] = cpu_to_le32(je->iops[i]);
673 }
674
675 je->elapsed_sec = cpu_to_le64(je->elapsed_sec);
676 je->eta_sec = cpu_to_le64(je->eta_sec);
677 je->nr_threads = cpu_to_le32(je->nr_threads);
678 je->is_pow2 = cpu_to_le32(je->is_pow2);
679 je->unit_base = cpu_to_le32(je->unit_base);
680
681 fio_net_send_cmd(server_fd, FIO_NET_CMD_ETA, je, size, &tag, NULL);
682 free(je);
683 return 0;
684}
685
686static int send_update_job_reply(int fd, uint64_t __tag, int error)
687{
688 uint64_t tag = __tag;
689 uint32_t pdu_error;
690
691 pdu_error = __cpu_to_le32(error);
692 return fio_net_send_cmd(fd, FIO_NET_CMD_UPDATE_JOB, &pdu_error, sizeof(pdu_error), &tag, NULL);
693}
694
695static int handle_update_job_cmd(struct fio_net_cmd *cmd)
696{
697 struct cmd_add_job_pdu *pdu = (struct cmd_add_job_pdu *) cmd->payload;
698 struct thread_data *td;
699 uint32_t tnumber;
700
701 tnumber = le32_to_cpu(pdu->thread_number);
702
703 dprint(FD_NET, "server: updating options for job %u\n", tnumber);
704
705 if (!tnumber || tnumber > thread_number) {
706 send_update_job_reply(server_fd, cmd->tag, ENODEV);
707 return 0;
708 }
709
710 td = &threads[tnumber - 1];
711 convert_thread_options_to_cpu(&td->o, &pdu->top);
712 send_update_job_reply(server_fd, cmd->tag, 0);
713 return 0;
714}
715
716static int handle_command(struct fio_net_cmd *cmd)
717{
718 int ret;
719
720 dprint(FD_NET, "server: got op [%s], pdu=%u, tag=%llx\n",
721 fio_server_op(cmd->opcode), cmd->pdu_len,
722 (unsigned long long) cmd->tag);
723
724 switch (cmd->opcode) {
725 case FIO_NET_CMD_QUIT:
726 fio_terminate_threads(TERMINATE_ALL);
727 return -1;
728 case FIO_NET_CMD_EXIT:
729 exit_backend = 1;
730 return -1;
731 case FIO_NET_CMD_JOB:
732 ret = handle_job_cmd(cmd);
733 break;
734 case FIO_NET_CMD_JOBLINE:
735 ret = handle_jobline_cmd(cmd);
736 break;
737 case FIO_NET_CMD_PROBE:
738 ret = handle_probe_cmd(cmd);
739 break;
740 case FIO_NET_CMD_SEND_ETA:
741 ret = handle_send_eta_cmd(cmd);
742 break;
743 case FIO_NET_CMD_RUN:
744 ret = handle_run_cmd(cmd);
745 break;
746 case FIO_NET_CMD_UPDATE_JOB:
747 ret = handle_update_job_cmd(cmd);
748 break;
749 default:
750 log_err("fio: unknown opcode: %s\n", fio_server_op(cmd->opcode));
751 ret = 1;
752 }
753
754 return ret;
755}
756
757static int handle_connection(int sk)
758{
759 struct fio_net_cmd *cmd = NULL;
760 int ret = 0;
761
762 reset_fio_state();
763 INIT_FLIST_HEAD(&job_list);
764 server_fd = sk;
765
766 /* read forever */
767 while (!exit_backend) {
768 struct pollfd pfd = {
769 .fd = sk,
770 .events = POLLIN,
771 };
772
773 ret = 0;
774 do {
775 int timeout = 1000;
776
777 if (!flist_empty(&job_list))
778 timeout = 100;
779
780 ret = poll(&pfd, 1, timeout);
781 if (ret < 0) {
782 if (errno == EINTR)
783 break;
784 log_err("fio: poll: %s\n", strerror(errno));
785 break;
786 } else if (!ret) {
787 fio_server_check_jobs();
788 continue;
789 }
790
791 if (pfd.revents & POLLIN)
792 break;
793 if (pfd.revents & (POLLERR|POLLHUP)) {
794 ret = 1;
795 break;
796 }
797 } while (!exit_backend);
798
799 fio_server_check_jobs();
800
801 if (ret < 0)
802 break;
803
804 cmd = fio_net_recv_cmd(sk);
805 if (!cmd) {
806 ret = -1;
807 break;
808 }
809
810 ret = handle_command(cmd);
811 if (ret)
812 break;
813
814 free(cmd);
815 cmd = NULL;
816 }
817
818 if (cmd)
819 free(cmd);
820
821 close(sk);
822 _exit(ret);
823}
824
825static int accept_loop(int listen_sk)
826{
827 struct sockaddr_in addr;
828 socklen_t len = sizeof(addr);
829 struct pollfd pfd;
830 int ret = 0, sk, flags, exitval = 0;
831
832 dprint(FD_NET, "server enter accept loop\n");
833
834 flags = fcntl(listen_sk, F_GETFL);
835 flags |= O_NONBLOCK;
836 fcntl(listen_sk, F_SETFL, flags);
837
838 while (!exit_backend) {
839 pid_t pid;
840
841 pfd.fd = listen_sk;
842 pfd.events = POLLIN;
843 do {
844 int timeout = 1000;
845
846 if (!flist_empty(&conn_list))
847 timeout = 100;
848
849 ret = poll(&pfd, 1, timeout);
850 if (ret < 0) {
851 if (errno == EINTR)
852 break;
853 log_err("fio: poll: %s\n", strerror(errno));
854 break;
855 } else if (!ret) {
856 fio_server_check_conns();
857 continue;
858 }
859
860 if (pfd.revents & POLLIN)
861 break;
862 } while (!exit_backend);
863
864 fio_server_check_conns();
865
866 if (exit_backend || ret < 0)
867 break;
868
869 sk = accept(listen_sk, (struct sockaddr *) &addr, &len);
870 if (sk < 0) {
871 log_err("fio: accept: %s\n", strerror(errno));
872 return -1;
873 }
874
875 dprint(FD_NET, "server: connect from %s\n", inet_ntoa(addr.sin_addr));
876
877 pid = fork();
878 if (pid) {
879 close(sk);
880 fio_server_add_conn_pid(pid);
881 continue;
882 }
883
884 /* exits */
885 handle_connection(sk);
886 }
887
888 return exitval;
889}
890
891int fio_server_text_output(int level, const char *buf, size_t len)
892{
893 struct cmd_text_pdu *pdu;
894 unsigned int tlen;
895 struct timeval tv;
896
897 if (server_fd == -1)
898 return log_local_buf(buf, len);
899
900 tlen = sizeof(*pdu) + len;
901 pdu = malloc(tlen);
902
903 pdu->level = __cpu_to_le32(level);
904 pdu->buf_len = __cpu_to_le32(len);
905
906 gettimeofday(&tv, NULL);
907 pdu->log_sec = __cpu_to_le64(tv.tv_sec);
908 pdu->log_usec = __cpu_to_le64(tv.tv_usec);
909
910 memcpy(pdu->buf, buf, len);
911
912 fio_net_send_cmd(server_fd, FIO_NET_CMD_TEXT, pdu, tlen, NULL, NULL);
913 free(pdu);
914 return len;
915}
916
917static void convert_io_stat(struct io_stat *dst, struct io_stat *src)
918{
919 dst->max_val = cpu_to_le64(src->max_val);
920 dst->min_val = cpu_to_le64(src->min_val);
921 dst->samples = cpu_to_le64(src->samples);
922
923 /*
924 * Encode to IEEE 754 for network transfer
925 */
926 dst->mean.u.i = __cpu_to_le64(fio_double_to_uint64(src->mean.u.f));
927 dst->S.u.i = __cpu_to_le64(fio_double_to_uint64(src->S.u.f));
928}
929
930static void convert_gs(struct group_run_stats *dst, struct group_run_stats *src)
931{
932 int i;
933
934 for (i = 0; i < DDIR_RWDIR_CNT; i++) {
935 dst->max_run[i] = cpu_to_le64(src->max_run[i]);
936 dst->min_run[i] = cpu_to_le64(src->min_run[i]);
937 dst->max_bw[i] = cpu_to_le64(src->max_bw[i]);
938 dst->min_bw[i] = cpu_to_le64(src->min_bw[i]);
939 dst->io_kb[i] = cpu_to_le64(src->io_kb[i]);
940 dst->agg[i] = cpu_to_le64(src->agg[i]);
941 }
942
943 dst->kb_base = cpu_to_le32(src->kb_base);
944 dst->unit_base = cpu_to_le32(src->unit_base);
945 dst->groupid = cpu_to_le32(src->groupid);
946 dst->unified_rw_rep = cpu_to_le32(src->unified_rw_rep);
947}
948
949/*
950 * Send a CMD_TS, which packs struct thread_stat and group_run_stats
951 * into a single payload.
952 */
953void fio_server_send_ts(struct thread_stat *ts, struct group_run_stats *rs)
954{
955 struct cmd_ts_pdu p;
956 int i, j;
957
958 dprint(FD_NET, "server sending end stats\n");
959
960 memset(&p, 0, sizeof(p));
961
962 strcpy(p.ts.name, ts->name);
963 strcpy(p.ts.verror, ts->verror);
964 strcpy(p.ts.description, ts->description);
965
966 p.ts.error = cpu_to_le32(ts->error);
967 p.ts.thread_number = cpu_to_le32(ts->thread_number);
968 p.ts.groupid = cpu_to_le32(ts->groupid);
969 p.ts.pid = cpu_to_le32(ts->pid);
970 p.ts.members = cpu_to_le32(ts->members);
971 p.ts.unified_rw_rep = cpu_to_le32(ts->unified_rw_rep);
972
973 for (i = 0; i < DDIR_RWDIR_CNT; i++) {
974 convert_io_stat(&p.ts.clat_stat[i], &ts->clat_stat[i]);
975 convert_io_stat(&p.ts.slat_stat[i], &ts->slat_stat[i]);
976 convert_io_stat(&p.ts.lat_stat[i], &ts->lat_stat[i]);
977 convert_io_stat(&p.ts.bw_stat[i], &ts->bw_stat[i]);
978 }
979
980 p.ts.usr_time = cpu_to_le64(ts->usr_time);
981 p.ts.sys_time = cpu_to_le64(ts->sys_time);
982 p.ts.ctx = cpu_to_le64(ts->ctx);
983 p.ts.minf = cpu_to_le64(ts->minf);
984 p.ts.majf = cpu_to_le64(ts->majf);
985 p.ts.clat_percentiles = cpu_to_le64(ts->clat_percentiles);
986
987 for (i = 0; i < FIO_IO_U_LIST_MAX_LEN; i++) {
988 fio_fp64_t *src = &ts->percentile_list[i];
989 fio_fp64_t *dst = &p.ts.percentile_list[i];
990
991 dst->u.i = __cpu_to_le64(fio_double_to_uint64(src->u.f));
992 }
993
994 for (i = 0; i < FIO_IO_U_MAP_NR; i++) {
995 p.ts.io_u_map[i] = cpu_to_le32(ts->io_u_map[i]);
996 p.ts.io_u_submit[i] = cpu_to_le32(ts->io_u_submit[i]);
997 p.ts.io_u_complete[i] = cpu_to_le32(ts->io_u_complete[i]);
998 }
999
1000 for (i = 0; i < FIO_IO_U_LAT_U_NR; i++) {
1001 p.ts.io_u_lat_u[i] = cpu_to_le32(ts->io_u_lat_u[i]);
1002 p.ts.io_u_lat_m[i] = cpu_to_le32(ts->io_u_lat_m[i]);
1003 }
1004
1005 for (i = 0; i < DDIR_RWDIR_CNT; i++)
1006 for (j = 0; j < FIO_IO_U_PLAT_NR; j++)
1007 p.ts.io_u_plat[i][j] = cpu_to_le32(ts->io_u_plat[i][j]);
1008
1009 for (i = 0; i < DDIR_RWDIR_CNT; i++) {
1010 p.ts.total_io_u[i] = cpu_to_le64(ts->total_io_u[i]);
1011 p.ts.short_io_u[i] = cpu_to_le64(ts->short_io_u[i]);
1012 }
1013
1014 p.ts.total_submit = cpu_to_le64(ts->total_submit);
1015 p.ts.total_complete = cpu_to_le64(ts->total_complete);
1016
1017 for (i = 0; i < DDIR_RWDIR_CNT; i++) {
1018 p.ts.io_bytes[i] = cpu_to_le64(ts->io_bytes[i]);
1019 p.ts.runtime[i] = cpu_to_le64(ts->runtime[i]);
1020 }
1021
1022 p.ts.total_run_time = cpu_to_le64(ts->total_run_time);
1023 p.ts.continue_on_error = cpu_to_le16(ts->continue_on_error);
1024 p.ts.total_err_count = cpu_to_le64(ts->total_err_count);
1025 p.ts.first_error = cpu_to_le32(ts->first_error);
1026 p.ts.kb_base = cpu_to_le32(ts->kb_base);
1027 p.ts.unit_base = cpu_to_le32(ts->unit_base);
1028
1029 convert_gs(&p.rs, rs);
1030
1031 fio_net_send_cmd(server_fd, FIO_NET_CMD_TS, &p, sizeof(p), NULL, NULL);
1032}
1033
1034void fio_server_send_gs(struct group_run_stats *rs)
1035{
1036 struct group_run_stats gs;
1037
1038 dprint(FD_NET, "server sending group run stats\n");
1039
1040 convert_gs(&gs, rs);
1041 fio_net_send_cmd(server_fd, FIO_NET_CMD_GS, &gs, sizeof(gs), NULL, NULL);
1042}
1043
1044static void convert_agg(struct disk_util_agg *dst, struct disk_util_agg *src)
1045{
1046 int i;
1047
1048 for (i = 0; i < 2; i++) {
1049 dst->ios[i] = cpu_to_le32(src->ios[i]);
1050 dst->merges[i] = cpu_to_le32(src->merges[i]);
1051 dst->sectors[i] = cpu_to_le64(src->sectors[i]);
1052 dst->ticks[i] = cpu_to_le32(src->ticks[i]);
1053 }
1054
1055 dst->io_ticks = cpu_to_le32(src->io_ticks);
1056 dst->time_in_queue = cpu_to_le32(src->time_in_queue);
1057 dst->slavecount = cpu_to_le32(src->slavecount);
1058 dst->max_util.u.i = __cpu_to_le64(fio_double_to_uint64(src->max_util.u.f));
1059}
1060
1061static void convert_dus(struct disk_util_stat *dst, struct disk_util_stat *src)
1062{
1063 int i;
1064
1065 strcpy((char *) dst->name, (char *) src->name);
1066
1067 for (i = 0; i < 2; i++) {
1068 dst->ios[i] = cpu_to_le32(src->ios[i]);
1069 dst->merges[i] = cpu_to_le32(src->merges[i]);
1070 dst->sectors[i] = cpu_to_le64(src->sectors[i]);
1071 dst->ticks[i] = cpu_to_le32(src->ticks[i]);
1072 }
1073
1074 dst->io_ticks = cpu_to_le32(src->io_ticks);
1075 dst->time_in_queue = cpu_to_le32(src->time_in_queue);
1076 dst->msec = cpu_to_le64(src->msec);
1077}
1078
1079void fio_server_send_du(void)
1080{
1081 struct disk_util *du;
1082 struct flist_head *entry;
1083 struct cmd_du_pdu pdu;
1084
1085 dprint(FD_NET, "server: sending disk_util %d\n", !flist_empty(&disk_list));
1086
1087 memset(&pdu, 0, sizeof(pdu));
1088
1089 flist_for_each(entry, &disk_list) {
1090 du = flist_entry(entry, struct disk_util, list);
1091
1092 convert_dus(&pdu.dus, &du->dus);
1093 convert_agg(&pdu.agg, &du->agg);
1094
1095 fio_net_send_cmd(server_fd, FIO_NET_CMD_DU, &pdu, sizeof(pdu), NULL, NULL);
1096 }
1097}
1098
1099/*
1100 * Send a command with a separate PDU, not inlined in the command
1101 */
1102static int fio_send_cmd_ext_pdu(int sk, uint16_t opcode, const void *buf,
1103 off_t size, uint64_t tag, uint32_t flags)
1104{
1105 struct fio_net_cmd cmd;
1106 struct iovec iov[2];
1107
1108 iov[0].iov_base = &cmd;
1109 iov[0].iov_len = sizeof(cmd);
1110 iov[1].iov_base = (void *) buf;
1111 iov[1].iov_len = size;
1112
1113 __fio_init_net_cmd(&cmd, opcode, size, tag);
1114 cmd.flags = __cpu_to_le32(flags);
1115 fio_net_cmd_crc_pdu(&cmd, buf);
1116
1117 return fio_sendv_data(sk, iov, 2);
1118}
1119
1120int fio_send_iolog(struct thread_data *td, struct io_log *log, const char *name)
1121{
1122 struct cmd_iolog_pdu pdu;
1123 z_stream stream;
1124 void *out_pdu;
1125 int i, ret = 0;
1126
1127 pdu.thread_number = cpu_to_le32(td->thread_number);
1128 pdu.nr_samples = __cpu_to_le32(log->nr_samples);
1129 pdu.log_type = cpu_to_le32(log->log_type);
1130 strcpy((char *) pdu.name, name);
1131
1132 for (i = 0; i < log->nr_samples; i++) {
1133 struct io_sample *s = &log->log[i];
1134
1135 s->time = cpu_to_le64(s->time);
1136 s->val = cpu_to_le64(s->val);
1137 s->ddir = cpu_to_le32(s->ddir);
1138 s->bs = cpu_to_le32(s->bs);
1139 }
1140
1141 /*
1142 * Dirty - since the log is potentially huge, compress it into
1143 * FIO_SERVER_MAX_FRAGMENT_PDU chunks and let the receiving
1144 * side defragment it.
1145 */
1146 out_pdu = malloc(FIO_SERVER_MAX_FRAGMENT_PDU);
1147
1148 stream.zalloc = Z_NULL;
1149 stream.zfree = Z_NULL;
1150 stream.opaque = Z_NULL;
1151
1152 if (deflateInit(&stream, Z_DEFAULT_COMPRESSION) != Z_OK) {
1153 ret = 1;
1154 goto err;
1155 }
1156
1157 /*
1158 * Send header first, it's not compressed.
1159 */
1160 ret = fio_send_cmd_ext_pdu(server_fd, FIO_NET_CMD_IOLOG, &pdu,
1161 sizeof(pdu), 0, FIO_NET_CMD_F_MORE);
1162 if (ret)
1163 goto err_zlib;
1164
1165 stream.next_in = (void *) log->log;
1166 stream.avail_in = log->nr_samples * sizeof(struct io_sample);
1167
1168 do {
1169 unsigned int this_len, flags = 0;
1170 int ret;
1171
1172 stream.avail_out = FIO_SERVER_MAX_FRAGMENT_PDU;
1173 stream.next_out = out_pdu;
1174 ret = deflate(&stream, Z_FINISH);
1175 /* may be Z_OK, or Z_STREAM_END */
1176 if (ret < 0)
1177 goto err_zlib;
1178
1179 this_len = FIO_SERVER_MAX_FRAGMENT_PDU - stream.avail_out;
1180
1181 if (stream.avail_in)
1182 flags = FIO_NET_CMD_F_MORE;
1183
1184 ret = fio_send_cmd_ext_pdu(server_fd, FIO_NET_CMD_IOLOG,
1185 out_pdu, this_len, 0, flags);
1186 if (ret)
1187 goto err_zlib;
1188 } while (stream.avail_in);
1189
1190err_zlib:
1191 deflateEnd(&stream);
1192err:
1193 free(out_pdu);
1194 return ret;
1195}
1196
1197void fio_server_send_add_job(struct thread_data *td)
1198{
1199 struct cmd_add_job_pdu pdu;
1200
1201 memset(&pdu, 0, sizeof(pdu));
1202 pdu.thread_number = cpu_to_le32(td->thread_number);
1203 pdu.groupid = cpu_to_le32(td->groupid);
1204 convert_thread_options_to_net(&pdu.top, &td->o);
1205
1206 fio_net_send_cmd(server_fd, FIO_NET_CMD_ADD_JOB, &pdu, sizeof(pdu), NULL, NULL);
1207}
1208
1209void fio_server_send_start(struct thread_data *td)
1210{
1211 assert(server_fd != -1);
1212
1213 fio_net_send_simple_cmd(server_fd, FIO_NET_CMD_SERVER_START, 0, NULL);
1214}
1215
1216static int fio_init_server_ip(void)
1217{
1218 struct sockaddr *addr;
1219 socklen_t socklen;
1220 int sk, opt;
1221
1222 if (use_ipv6)
1223 sk = socket(AF_INET6, SOCK_STREAM, 0);
1224 else
1225 sk = socket(AF_INET, SOCK_STREAM, 0);
1226
1227 if (sk < 0) {
1228 log_err("fio: socket: %s\n", strerror(errno));
1229 return -1;
1230 }
1231
1232 opt = 1;
1233 if (setsockopt(sk, SOL_SOCKET, SO_REUSEADDR, (void *)&opt, sizeof(opt)) < 0) {
1234 log_err("fio: setsockopt: %s\n", strerror(errno));
1235 close(sk);
1236 return -1;
1237 }
1238#ifdef SO_REUSEPORT
1239 if (setsockopt(sk, SOL_SOCKET, SO_REUSEPORT, &opt, sizeof(opt)) < 0) {
1240 log_err("fio: setsockopt: %s\n", strerror(errno));
1241 close(sk);
1242 return -1;
1243 }
1244#endif
1245
1246 if (use_ipv6) {
1247 addr = (struct sockaddr *) &saddr_in6;
1248 socklen = sizeof(saddr_in6);
1249 saddr_in6.sin6_family = AF_INET6;
1250 } else {
1251 addr = (struct sockaddr *) &saddr_in;
1252 socklen = sizeof(saddr_in);
1253 saddr_in.sin_family = AF_INET;
1254 }
1255
1256 if (bind(sk, addr, socklen) < 0) {
1257 log_err("fio: bind: %s\n", strerror(errno));
1258 close(sk);
1259 return -1;
1260 }
1261
1262 return sk;
1263}
1264
1265static int fio_init_server_sock(void)
1266{
1267 struct sockaddr_un addr;
1268 socklen_t len;
1269 mode_t mode;
1270 int sk;
1271
1272 sk = socket(AF_UNIX, SOCK_STREAM, 0);
1273 if (sk < 0) {
1274 log_err("fio: socket: %s\n", strerror(errno));
1275 return -1;
1276 }
1277
1278 mode = umask(000);
1279
1280 memset(&addr, 0, sizeof(addr));
1281 addr.sun_family = AF_UNIX;
1282 strcpy(addr.sun_path, bind_sock);
1283 unlink(bind_sock);
1284
1285 len = sizeof(addr.sun_family) + strlen(bind_sock) + 1;
1286
1287 if (bind(sk, (struct sockaddr *) &addr, len) < 0) {
1288 log_err("fio: bind: %s\n", strerror(errno));
1289 close(sk);
1290 return -1;
1291 }
1292
1293 umask(mode);
1294 return sk;
1295}
1296
1297static int fio_init_server_connection(void)
1298{
1299 char bind_str[128];
1300 int sk;
1301
1302 dprint(FD_NET, "starting server\n");
1303
1304 if (!bind_sock)
1305 sk = fio_init_server_ip();
1306 else
1307 sk = fio_init_server_sock();
1308
1309 if (sk < 0)
1310 return sk;
1311
1312 if (!bind_sock) {
1313 char *p, port[16];
1314 const void *src;
1315 int af;
1316
1317 if (use_ipv6) {
1318 af = AF_INET6;
1319 src = &saddr_in6.sin6_addr;
1320 } else {
1321 af = AF_INET;
1322 src = &saddr_in.sin_addr;
1323 }
1324
1325 p = (char *) inet_ntop(af, src, bind_str, sizeof(bind_str));
1326
1327 sprintf(port, ",%u", fio_net_port);
1328 if (p)
1329 strcat(p, port);
1330 else
1331 strcpy(bind_str, port);
1332 } else
1333 strcpy(bind_str, bind_sock);
1334
1335 log_info("fio: server listening on %s\n", bind_str);
1336
1337 if (listen(sk, 0) < 0) {
1338 log_err("fio: listen: %s\n", strerror(errno));
1339 return -1;
1340 }
1341
1342 return sk;
1343}
1344
1345int fio_server_parse_host(const char *host, int *ipv6, struct in_addr *inp,
1346 struct in6_addr *inp6)
1347
1348{
1349 int ret = 0;
1350
1351 if (*ipv6)
1352 ret = inet_pton(AF_INET6, host, inp6);
1353 else
1354 ret = inet_pton(AF_INET, host, inp);
1355
1356 if (ret != 1) {
1357 struct hostent *hent;
1358
1359 hent = gethostbyname(host);
1360 if (!hent) {
1361 log_err("fio: failed to resolve <%s>\n", host);
1362 return 0;
1363 }
1364
1365 if (*ipv6) {
1366 if (hent->h_addrtype != AF_INET6) {
1367 log_info("fio: falling back to IPv4\n");
1368 *ipv6 = 0;
1369 } else
1370 memcpy(inp6, hent->h_addr_list[0], 16);
1371 }
1372 if (!*ipv6) {
1373 if (hent->h_addrtype != AF_INET) {
1374 log_err("fio: lookup type mismatch\n");
1375 return 0;
1376 }
1377 memcpy(inp, hent->h_addr_list[0], 4);
1378 }
1379 ret = 1;
1380 }
1381
1382 return !(ret == 1);
1383}
1384
1385/*
1386 * Parse a host/ip/port string. Reads from 'str'.
1387 *
1388 * Outputs:
1389 *
1390 * For IPv4:
1391 * *ptr is the host, *port is the port, inp is the destination.
1392 * For IPv6:
1393 * *ptr is the host, *port is the port, inp6 is the dest, and *ipv6 is 1.
1394 * For local domain sockets:
1395 * *ptr is the filename, *is_sock is 1.
1396 */
1397int fio_server_parse_string(const char *str, char **ptr, int *is_sock,
1398 int *port, struct in_addr *inp,
1399 struct in6_addr *inp6, int *ipv6)
1400{
1401 const char *host = str;
1402 char *portp;
1403 int lport = 0;
1404
1405 *ptr = NULL;
1406 *is_sock = 0;
1407 *port = fio_net_port;
1408 *ipv6 = 0;
1409
1410 if (!strncmp(str, "sock:", 5)) {
1411 *ptr = strdup(str + 5);
1412 *is_sock = 1;
1413
1414 return 0;
1415 }
1416
1417 /*
1418 * Is it ip:<ip or host>:port
1419 */
1420 if (!strncmp(host, "ip:", 3))
1421 host += 3;
1422 else if (!strncmp(host, "ip4:", 4))
1423 host += 4;
1424 else if (!strncmp(host, "ip6:", 4)) {
1425 host += 4;
1426 *ipv6 = 1;
1427 } else if (host[0] == ':') {
1428 /* String is :port */
1429 host++;
1430 lport = atoi(host);
1431 if (!lport || lport > 65535) {
1432 log_err("fio: bad server port %u\n", port);
1433 return 1;
1434 }
1435 /* no hostname given, we are done */
1436 *port = lport;
1437 return 0;
1438 }
1439
1440 /*
1441 * If no port seen yet, check if there's a last ':' at the end
1442 */
1443 if (!lport) {
1444 portp = strchr(host, ',');
1445 if (portp) {
1446 *portp = '\0';
1447 portp++;
1448 lport = atoi(portp);
1449 if (!lport || lport > 65535) {
1450 log_err("fio: bad server port %u\n", port);
1451 return 1;
1452 }
1453 }
1454 }
1455
1456 if (lport)
1457 *port = lport;
1458
1459 if (!strlen(host))
1460 return 0;
1461
1462 *ptr = strdup(host);
1463
1464 if (fio_server_parse_host(*ptr, ipv6, inp, inp6)) {
1465 free(*ptr);
1466 *ptr = NULL;
1467 return 1;
1468 }
1469
1470 if (*port == 0)
1471 *port = fio_net_port;
1472
1473 return 0;
1474}
1475
1476/*
1477 * Server arg should be one of:
1478 *
1479 * sock:/path/to/socket
1480 * ip:1.2.3.4
1481 * 1.2.3.4
1482 *
1483 * Where sock uses unix domain sockets, and ip binds the server to
1484 * a specific interface. If no arguments are given to the server, it
1485 * uses IP and binds to 0.0.0.0.
1486 *
1487 */
1488static int fio_handle_server_arg(void)
1489{
1490 int port = fio_net_port;
1491 int is_sock, ret = 0;
1492
1493 saddr_in.sin_addr.s_addr = htonl(INADDR_ANY);
1494
1495 if (!fio_server_arg)
1496 goto out;
1497
1498 ret = fio_server_parse_string(fio_server_arg, &bind_sock, &is_sock,
1499 &port, &saddr_in.sin_addr,
1500 &saddr_in6.sin6_addr, &use_ipv6);
1501
1502 if (!is_sock && bind_sock) {
1503 free(bind_sock);
1504 bind_sock = NULL;
1505 }
1506
1507out:
1508 fio_net_port = port;
1509 saddr_in.sin_port = htons(port);
1510 saddr_in6.sin6_port = htons(port);
1511 return ret;
1512}
1513
1514static int fio_server(void)
1515{
1516 int sk, ret;
1517
1518 dprint(FD_NET, "starting server\n");
1519
1520 if (fio_handle_server_arg())
1521 return -1;
1522
1523 sk = fio_init_server_connection();
1524 if (sk < 0)
1525 return -1;
1526
1527 ret = accept_loop(sk);
1528
1529 close(sk);
1530
1531 if (fio_server_arg) {
1532 free(fio_server_arg);
1533 fio_server_arg = NULL;
1534 }
1535 if (bind_sock)
1536 free(bind_sock);
1537
1538 return ret;
1539}
1540
1541void fio_server_got_signal(int signal)
1542{
1543 if (signal == SIGPIPE)
1544 server_fd = -1;
1545 else {
1546 log_info("\nfio: terminating on signal %d\n", signal);
1547 exit_backend = 1;
1548 }
1549}
1550
1551static int check_existing_pidfile(const char *pidfile)
1552{
1553 struct stat sb;
1554 char buf[16];
1555 pid_t pid;
1556 FILE *f;
1557
1558 if (stat(pidfile, &sb))
1559 return 0;
1560
1561 f = fopen(pidfile, "r");
1562 if (!f)
1563 return 0;
1564
1565 if (fread(buf, sb.st_size, 1, f) <= 0) {
1566 fclose(f);
1567 return 1;
1568 }
1569 fclose(f);
1570
1571 pid = atoi(buf);
1572 if (kill(pid, SIGCONT) < 0)
1573 return errno != ESRCH;
1574
1575 return 1;
1576}
1577
1578static int write_pid(pid_t pid, const char *pidfile)
1579{
1580 FILE *fpid;
1581
1582 fpid = fopen(pidfile, "w");
1583 if (!fpid) {
1584 log_err("fio: failed opening pid file %s\n", pidfile);
1585 return 1;
1586 }
1587
1588 fprintf(fpid, "%u\n", (unsigned int) pid);
1589 fclose(fpid);
1590 return 0;
1591}
1592
1593/*
1594 * If pidfile is specified, background us.
1595 */
1596int fio_start_server(char *pidfile)
1597{
1598 pid_t pid;
1599 int ret;
1600
1601#if defined(WIN32)
1602 WSADATA wsd;
1603 WSAStartup(MAKEWORD(2, 2), &wsd);
1604#endif
1605
1606 if (!pidfile)
1607 return fio_server();
1608
1609 if (check_existing_pidfile(pidfile)) {
1610 log_err("fio: pidfile %s exists and server appears alive\n",
1611 pidfile);
1612 return -1;
1613 }
1614
1615 pid = fork();
1616 if (pid < 0) {
1617 log_err("fio: failed server fork: %s", strerror(errno));
1618 free(pidfile);
1619 return -1;
1620 } else if (pid) {
1621 int ret = write_pid(pid, pidfile);
1622
1623 exit(ret);
1624 }
1625
1626 setsid();
1627 openlog("fio", LOG_NDELAY|LOG_NOWAIT|LOG_PID, LOG_USER);
1628 log_syslog = 1;
1629 close(STDIN_FILENO);
1630 close(STDOUT_FILENO);
1631 close(STDERR_FILENO);
1632 f_out = NULL;
1633 f_err = NULL;
1634
1635 ret = fio_server();
1636
1637 closelog();
1638 unlink(pidfile);
1639 free(pidfile);
1640 return ret;
1641}
1642
1643void fio_server_set_arg(const char *arg)
1644{
1645 fio_server_arg = strdup(arg);
1646}
fio - Flexible IO Tester