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