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Don't request ETA until server has started jobs
[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
20#include "fio.h"
21#include "server.h"
22#include "crc/crc16.h"
23#include "lib/ieee754.h"
24
25#include "fio_version.h"
26
27int fio_net_port = 8765;
28
29int exit_backend = 0;
30
31static int server_fd = -1;
32static char *fio_server_arg;
33static char *bind_sock;
34static struct sockaddr_in saddr_in;
35static int first_cmd_check;
36
37static const char *fio_server_ops[FIO_NET_CMD_NR] = {
38 "",
39 "QUIT",
40 "EXIT",
41 "JOB",
42 "JOBLINE",
43 "TEXT",
44 "TS",
45 "GS",
46 "SEND_ETA",
47 "ETA",
48 "PROBE",
49 "START",
50 "STOP",
51 "DISK_UTIL",
52 "RUN",
53};
54
55const char *fio_server_op(unsigned int op)
56{
57 static char buf[32];
58
59 if (op < FIO_NET_CMD_NR)
60 return fio_server_ops[op];
61
62 sprintf(buf, "UNKNOWN/%d", op);
63 return buf;
64}
65
66int fio_send_data(int sk, const void *p, unsigned int len)
67{
68 assert(len <= sizeof(struct fio_net_cmd) + FIO_SERVER_MAX_PDU);
69
70 do {
71 int ret = send(sk, p, len, 0);
72
73 if (ret > 0) {
74 len -= ret;
75 if (!len)
76 break;
77 p += ret;
78 continue;
79 } else if (!ret)
80 break;
81 else if (errno == EAGAIN || errno == EINTR)
82 continue;
83 else
84 break;
85 } while (!exit_backend);
86
87 if (!len)
88 return 0;
89
90 return 1;
91}
92
93int fio_recv_data(int sk, void *p, unsigned int len)
94{
95 do {
96 int ret = recv(sk, p, len, MSG_WAITALL);
97
98 if (ret > 0) {
99 len -= ret;
100 if (!len)
101 break;
102 p += ret;
103 continue;
104 } else if (!ret)
105 break;
106 else if (errno == EAGAIN || errno == EINTR)
107 continue;
108 else
109 break;
110 } while (!exit_backend);
111
112 if (!len)
113 return 0;
114
115 return -1;
116}
117
118static int verify_convert_cmd(struct fio_net_cmd *cmd)
119{
120 uint16_t crc;
121
122 cmd->cmd_crc16 = le16_to_cpu(cmd->cmd_crc16);
123 cmd->pdu_crc16 = le16_to_cpu(cmd->pdu_crc16);
124
125 crc = crc16(cmd, FIO_NET_CMD_CRC_SZ);
126 if (crc != cmd->cmd_crc16) {
127 log_err("fio: server bad crc on command (got %x, wanted %x)\n",
128 cmd->cmd_crc16, crc);
129 return 1;
130 }
131
132 cmd->version = le16_to_cpu(cmd->version);
133 cmd->opcode = le16_to_cpu(cmd->opcode);
134 cmd->flags = le32_to_cpu(cmd->flags);
135 cmd->tag = le64_to_cpu(cmd->tag);
136 cmd->pdu_len = le32_to_cpu(cmd->pdu_len);
137
138 switch (cmd->version) {
139 case FIO_SERVER_VER:
140 break;
141 default:
142 log_err("fio: bad server cmd version %d\n", cmd->version);
143 return 1;
144 }
145
146 if (cmd->pdu_len > FIO_SERVER_MAX_PDU) {
147 log_err("fio: command payload too large: %u\n", cmd->pdu_len);
148 return 1;
149 }
150
151 return 0;
152}
153
154/*
155 * Read (and defragment, if necessary) incoming commands
156 */
157struct fio_net_cmd *fio_net_recv_cmd(int sk)
158{
159 struct fio_net_cmd cmd, *cmdret = NULL;
160 size_t cmd_size = 0, pdu_offset = 0;
161 uint16_t crc;
162 int ret, first = 1;
163 void *pdu = NULL;
164
165 do {
166 ret = fio_recv_data(sk, &cmd, sizeof(cmd));
167 if (ret)
168 break;
169
170 /* We have a command, verify it and swap if need be */
171 ret = verify_convert_cmd(&cmd);
172 if (ret)
173 break;
174
175 if (first) {
176 /* if this is text, add room for \0 at the end */
177 cmd_size = sizeof(cmd) + cmd.pdu_len + 1;
178 assert(!cmdret);
179 } else
180 cmd_size += cmd.pdu_len;
181
182 cmdret = realloc(cmdret, cmd_size);
183
184 if (first)
185 memcpy(cmdret, &cmd, sizeof(cmd));
186 else
187 assert(cmdret->opcode == cmd.opcode);
188
189 if (!cmd.pdu_len)
190 break;
191
192 /* There's payload, get it */
193 pdu = (void *) cmdret->payload + pdu_offset;
194 ret = fio_recv_data(sk, pdu, cmd.pdu_len);
195 if (ret)
196 break;
197
198 /* Verify payload crc */
199 crc = crc16(pdu, cmd.pdu_len);
200 if (crc != cmd.pdu_crc16) {
201 log_err("fio: server bad crc on payload ");
202 log_err("(got %x, wanted %x)\n", cmd.pdu_crc16, crc);
203 ret = 1;
204 break;
205 }
206
207 pdu_offset += cmd.pdu_len;
208 if (!first)
209 cmdret->pdu_len += cmd.pdu_len;
210 first = 0;
211 } while (cmd.flags & FIO_NET_CMD_F_MORE);
212
213 if (ret) {
214 free(cmdret);
215 cmdret = NULL;
216 } else if (cmdret) {
217 /* zero-terminate text input */
218 if (cmdret->pdu_len && (cmdret->opcode == FIO_NET_CMD_TEXT ||
219 cmdret->opcode == FIO_NET_CMD_JOB)) {
220 char *buf = (char *) cmdret->payload;
221
222 buf[cmdret->pdu_len ] = '\0';
223 }
224 /* frag flag is internal */
225 cmdret->flags &= ~FIO_NET_CMD_F_MORE;
226 }
227
228 return cmdret;
229}
230
231void fio_net_cmd_crc(struct fio_net_cmd *cmd)
232{
233 uint32_t pdu_len;
234
235 cmd->cmd_crc16 = __cpu_to_le16(crc16(cmd, FIO_NET_CMD_CRC_SZ));
236
237 pdu_len = le32_to_cpu(cmd->pdu_len);
238 if (pdu_len)
239 cmd->pdu_crc16 = __cpu_to_le16(crc16(cmd->payload, pdu_len));
240}
241
242int fio_net_send_cmd(int fd, uint16_t opcode, const void *buf, off_t size,
243 uint64_t tag)
244{
245 struct fio_net_cmd *cmd = NULL;
246 size_t this_len, cur_len = 0;
247 int ret;
248
249 do {
250 this_len = size;
251 if (this_len > FIO_SERVER_MAX_PDU)
252 this_len = FIO_SERVER_MAX_PDU;
253
254 if (!cmd || cur_len < sizeof(*cmd) + this_len) {
255 if (cmd)
256 free(cmd);
257
258 cur_len = sizeof(*cmd) + this_len;
259 cmd = malloc(cur_len);
260 }
261
262 fio_init_net_cmd(cmd, opcode, buf, this_len, tag);
263
264 if (this_len < size)
265 cmd->flags = __cpu_to_le32(FIO_NET_CMD_F_MORE);
266
267 fio_net_cmd_crc(cmd);
268
269 ret = fio_send_data(fd, cmd, sizeof(*cmd) + this_len);
270 size -= this_len;
271 buf += this_len;
272 } while (!ret && size);
273
274 if (cmd)
275 free(cmd);
276
277 return ret;
278}
279
280static int fio_net_send_simple_stack_cmd(int sk, uint16_t opcode, uint64_t tag)
281{
282 struct fio_net_cmd cmd;
283
284 fio_init_net_cmd(&cmd, opcode, NULL, 0, tag);
285 fio_net_cmd_crc(&cmd);
286
287 return fio_send_data(sk, &cmd, sizeof(cmd));
288}
289
290/*
291 * If 'list' is non-NULL, then allocate and store the sent command for
292 * later verification.
293 */
294int fio_net_send_simple_cmd(int sk, uint16_t opcode, uint64_t tag,
295 struct flist_head *list)
296{
297 struct fio_net_int_cmd *cmd;
298 int ret;
299
300 if (!list)
301 return fio_net_send_simple_stack_cmd(sk, opcode, tag);
302
303 cmd = malloc(sizeof(*cmd));
304
305 fio_init_net_cmd(&cmd->cmd, opcode, NULL, 0, (uintptr_t) cmd);
306 fio_net_cmd_crc(&cmd->cmd);
307
308 INIT_FLIST_HEAD(&cmd->list);
309 gettimeofday(&cmd->tv, NULL);
310 cmd->saved_tag = tag;
311
312 ret = fio_send_data(sk, &cmd->cmd, sizeof(cmd->cmd));
313 if (ret) {
314 free(cmd);
315 return ret;
316 }
317
318 flist_add_tail(&cmd->list, list);
319 return 0;
320}
321
322static int fio_server_send_quit_cmd(void)
323{
324 dprint(FD_NET, "server: sending quit\n");
325 return fio_net_send_simple_cmd(server_fd, FIO_NET_CMD_QUIT, 0, NULL);
326}
327
328static int handle_job_cmd(struct fio_net_cmd *cmd)
329{
330 char *buf = (char *) cmd->payload;
331 int ret;
332
333 if (parse_jobs_ini(buf, 1, 0)) {
334 fio_server_send_quit_cmd();
335 return -1;
336 }
337
338 fio_net_send_simple_cmd(server_fd, FIO_NET_CMD_START, 0, NULL);
339
340 ret = exec_run();
341 fio_server_send_quit_cmd();
342 reset_fio_state();
343 return ret;
344}
345
346static int handle_jobline_cmd(struct fio_net_cmd *cmd)
347{
348 void *pdu = cmd->payload;
349 struct cmd_single_line_pdu *cslp;
350 struct cmd_line_pdu *clp;
351 unsigned long offset;
352 char **argv;
353 int ret, i;
354
355 clp = pdu;
356 clp->lines = le16_to_cpu(clp->lines);
357 argv = malloc(clp->lines * sizeof(char *));
358 offset = sizeof(*clp);
359
360 dprint(FD_NET, "server: %d command line args\n", clp->lines);
361
362 for (i = 0; i < clp->lines; i++) {
363 cslp = pdu + offset;
364 argv[i] = (char *) cslp->text;
365
366 offset += sizeof(*cslp) + le16_to_cpu(cslp->len);
367 dprint(FD_NET, "server: %d: %s\n", i, argv[i]);
368 }
369
370 if (parse_cmd_line(clp->lines, argv)) {
371 fio_server_send_quit_cmd();
372 free(argv);
373 return -1;
374 }
375
376 free(argv);
377
378 fio_net_send_simple_cmd(server_fd, FIO_NET_CMD_START, 0, NULL);
379
380 ret = exec_run();
381 fio_server_send_quit_cmd();
382 reset_fio_state();
383 return ret;
384}
385
386static int handle_probe_cmd(struct fio_net_cmd *cmd)
387{
388 struct cmd_probe_pdu probe;
389
390 dprint(FD_NET, "server: sending probe reply\n");
391
392 memset(&probe, 0, sizeof(probe));
393 gethostname((char *) probe.hostname, sizeof(probe.hostname));
394#ifdef FIO_BIG_ENDIAN
395 probe.bigendian = 1;
396#endif
397 probe.fio_major = FIO_MAJOR;
398 probe.fio_minor = FIO_MINOR;
399 probe.fio_patch = FIO_PATCH;
400
401 probe.os = FIO_OS;
402 probe.arch = FIO_ARCH;
403
404 probe.bpp = sizeof(void *);
405
406 return fio_net_send_cmd(server_fd, FIO_NET_CMD_PROBE, &probe, sizeof(probe), cmd->tag);
407}
408
409static int handle_send_eta_cmd(struct fio_net_cmd *cmd)
410{
411 struct jobs_eta *je;
412 size_t size;
413 int i;
414
415 if (!thread_number)
416 return 0;
417
418 size = sizeof(*je) + thread_number * sizeof(char) + 1;
419 je = malloc(size);
420 memset(je, 0, size);
421
422 if (!calc_thread_status(je, 1)) {
423 free(je);
424 return 0;
425 }
426
427 dprint(FD_NET, "server sending status\n");
428
429 je->nr_running = cpu_to_le32(je->nr_running);
430 je->nr_ramp = cpu_to_le32(je->nr_ramp);
431 je->nr_pending = cpu_to_le32(je->nr_pending);
432 je->files_open = cpu_to_le32(je->files_open);
433 je->m_rate = cpu_to_le32(je->m_rate);
434 je->t_rate = cpu_to_le32(je->t_rate);
435 je->m_iops = cpu_to_le32(je->m_iops);
436 je->t_iops = cpu_to_le32(je->t_iops);
437
438 for (i = 0; i < 2; i++) {
439 je->rate[i] = cpu_to_le32(je->rate[i]);
440 je->iops[i] = cpu_to_le32(je->iops[i]);
441 }
442
443 je->elapsed_sec = cpu_to_le32(je->nr_running);
444 je->eta_sec = cpu_to_le64(je->eta_sec);
445
446 fio_net_send_cmd(server_fd, FIO_NET_CMD_ETA, je, size, cmd->tag);
447 free(je);
448 return 0;
449}
450
451static int handle_command(struct fio_net_cmd *cmd)
452{
453 int ret;
454
455 dprint(FD_NET, "server: got op [%s], pdu=%u, tag=%lx\n",
456 fio_server_op(cmd->opcode), cmd->pdu_len, cmd->tag);
457
458 switch (cmd->opcode) {
459 case FIO_NET_CMD_QUIT:
460 fio_terminate_threads(TERMINATE_ALL);
461 return -1;
462 case FIO_NET_CMD_EXIT:
463 exit_backend = 1;
464 return -1;
465 case FIO_NET_CMD_JOB:
466 ret = handle_job_cmd(cmd);
467 break;
468 case FIO_NET_CMD_JOBLINE:
469 ret = handle_jobline_cmd(cmd);
470 break;
471 case FIO_NET_CMD_PROBE:
472 ret = handle_probe_cmd(cmd);
473 break;
474 case FIO_NET_CMD_SEND_ETA:
475 ret = handle_send_eta_cmd(cmd);
476 break;
477 default:
478 log_err("fio: unknown opcode: %s\n",fio_server_op(cmd->opcode));
479 ret = 1;
480 }
481
482 return ret;
483}
484
485static int handle_connection(int sk, int block)
486{
487 struct fio_net_cmd *cmd = NULL;
488 int ret = 0;
489
490 /* read forever */
491 while (!exit_backend) {
492 struct pollfd pfd = {
493 .fd = sk,
494 .events = POLLIN,
495 };
496
497 ret = 0;
498 do {
499 ret = poll(&pfd, 1, 100);
500 if (ret < 0) {
501 if (errno == EINTR)
502 break;
503 log_err("fio: poll: %s\n", strerror(errno));
504 break;
505 } else if (!ret) {
506 if (!block)
507 return 0;
508 continue;
509 }
510
511 if (pfd.revents & POLLIN)
512 break;
513 if (pfd.revents & (POLLERR|POLLHUP)) {
514 ret = 1;
515 break;
516 }
517 } while (!exit_backend);
518
519 if (ret < 0)
520 break;
521
522 cmd = fio_net_recv_cmd(sk);
523 if (!cmd) {
524 ret = -1;
525 break;
526 }
527
528 ret = handle_command(cmd);
529 if (ret)
530 break;
531
532 free(cmd);
533 cmd = NULL;
534 }
535
536 if (cmd)
537 free(cmd);
538
539 return ret;
540}
541
542void fio_server_idle_loop(void)
543{
544 if (!first_cmd_check)
545 fio_net_send_simple_cmd(server_fd, FIO_NET_CMD_RUN, 0, NULL);
546 if (server_fd != -1)
547 handle_connection(server_fd, 0);
548}
549
550static int accept_loop(int listen_sk)
551{
552 struct sockaddr_in addr;
553 fio_socklen_t len = sizeof(addr);
554 struct pollfd pfd;
555 int ret, sk, flags, exitval = 0;
556
557 dprint(FD_NET, "server enter accept loop\n");
558
559 flags = fcntl(listen_sk, F_GETFL);
560 flags |= O_NONBLOCK;
561 fcntl(listen_sk, F_SETFL, flags);
562again:
563 pfd.fd = listen_sk;
564 pfd.events = POLLIN;
565 do {
566 ret = poll(&pfd, 1, 100);
567 if (ret < 0) {
568 if (errno == EINTR)
569 break;
570 log_err("fio: poll: %s\n", strerror(errno));
571 goto out;
572 } else if (!ret)
573 continue;
574
575 if (pfd.revents & POLLIN)
576 break;
577 } while (!exit_backend);
578
579 if (exit_backend)
580 goto out;
581
582 sk = accept(listen_sk, (struct sockaddr *) &addr, &len);
583 if (sk < 0) {
584 log_err("fio: accept: %s\n", strerror(errno));
585 return -1;
586 }
587
588 dprint(FD_NET, "server: connect from %s\n", inet_ntoa(addr.sin_addr));
589
590 server_fd = sk;
591
592 exitval = handle_connection(sk, 1);
593
594 server_fd = -1;
595 close(sk);
596
597 if (!exit_backend)
598 goto again;
599
600out:
601 return exitval;
602}
603
604int fio_server_text_output(const char *buf, size_t len)
605{
606 if (server_fd != -1)
607 return fio_net_send_cmd(server_fd, FIO_NET_CMD_TEXT, buf, len, 0);
608
609 return log_local_buf(buf, len);
610}
611
612static void convert_io_stat(struct io_stat *dst, struct io_stat *src)
613{
614 dst->max_val = cpu_to_le64(src->max_val);
615 dst->min_val = cpu_to_le64(src->min_val);
616 dst->samples = cpu_to_le64(src->samples);
617
618 /*
619 * Encode to IEEE 754 for network transfer
620 */
621 dst->mean.u.i = __cpu_to_le64(fio_double_to_uint64(src->mean.u.f));
622 dst->S.u.i = __cpu_to_le64(fio_double_to_uint64(src->S.u.f));
623}
624
625static void convert_gs(struct group_run_stats *dst, struct group_run_stats *src)
626{
627 int i;
628
629 for (i = 0; i < 2; i++) {
630 dst->max_run[i] = cpu_to_le64(src->max_run[i]);
631 dst->min_run[i] = cpu_to_le64(src->min_run[i]);
632 dst->max_bw[i] = cpu_to_le64(src->max_bw[i]);
633 dst->min_bw[i] = cpu_to_le64(src->min_bw[i]);
634 dst->io_kb[i] = cpu_to_le64(src->io_kb[i]);
635 dst->agg[i] = cpu_to_le64(src->agg[i]);
636 }
637
638 dst->kb_base = cpu_to_le32(src->kb_base);
639 dst->groupid = cpu_to_le32(src->groupid);
640}
641
642/*
643 * Send a CMD_TS, which packs struct thread_stat and group_run_stats
644 * into a single payload.
645 */
646void fio_server_send_ts(struct thread_stat *ts, struct group_run_stats *rs)
647{
648 struct cmd_ts_pdu p;
649 int i, j;
650
651 dprint(FD_NET, "server sending end stats\n");
652
653 memset(&p, 0, sizeof(p));
654
655 strcpy(p.ts.name, ts->name);
656 strcpy(p.ts.verror, ts->verror);
657 strcpy(p.ts.description, ts->description);
658
659 p.ts.error = cpu_to_le32(ts->error);
660 p.ts.groupid = cpu_to_le32(ts->groupid);
661 p.ts.pid = cpu_to_le32(ts->pid);
662 p.ts.members = cpu_to_le32(ts->members);
663
664 for (i = 0; i < 2; i++) {
665 convert_io_stat(&p.ts.clat_stat[i], &ts->clat_stat[i]);
666 convert_io_stat(&p.ts.slat_stat[i], &ts->slat_stat[i]);
667 convert_io_stat(&p.ts.lat_stat[i], &ts->lat_stat[i]);
668 convert_io_stat(&p.ts.bw_stat[i], &ts->bw_stat[i]);
669 }
670
671 p.ts.usr_time = cpu_to_le64(ts->usr_time);
672 p.ts.sys_time = cpu_to_le64(ts->sys_time);
673 p.ts.ctx = cpu_to_le64(ts->ctx);
674 p.ts.minf = cpu_to_le64(ts->minf);
675 p.ts.majf = cpu_to_le64(ts->majf);
676 p.ts.clat_percentiles = cpu_to_le64(ts->clat_percentiles);
677
678 for (i = 0; i < FIO_IO_U_LIST_MAX_LEN; i++) {
679 fio_fp64_t *src = &ts->percentile_list[i];
680 fio_fp64_t *dst = &p.ts.percentile_list[i];
681
682 dst->u.i = __cpu_to_le64(fio_double_to_uint64(src->u.f));
683 }
684
685 for (i = 0; i < FIO_IO_U_MAP_NR; i++) {
686 p.ts.io_u_map[i] = cpu_to_le32(ts->io_u_map[i]);
687 p.ts.io_u_submit[i] = cpu_to_le32(ts->io_u_submit[i]);
688 p.ts.io_u_complete[i] = cpu_to_le32(ts->io_u_complete[i]);
689 }
690
691 for (i = 0; i < FIO_IO_U_LAT_U_NR; i++) {
692 p.ts.io_u_lat_u[i] = cpu_to_le32(ts->io_u_lat_u[i]);
693 p.ts.io_u_lat_m[i] = cpu_to_le32(ts->io_u_lat_m[i]);
694 }
695
696 for (i = 0; i < 2; i++)
697 for (j = 0; j < FIO_IO_U_PLAT_NR; j++)
698 p.ts.io_u_plat[i][j] = cpu_to_le32(ts->io_u_plat[i][j]);
699
700 for (i = 0; i < 3; i++) {
701 p.ts.total_io_u[i] = cpu_to_le64(ts->total_io_u[i]);
702 p.ts.short_io_u[i] = cpu_to_le64(ts->short_io_u[i]);
703 }
704
705 p.ts.total_submit = cpu_to_le64(ts->total_submit);
706 p.ts.total_complete = cpu_to_le64(ts->total_complete);
707
708 for (i = 0; i < 2; i++) {
709 p.ts.io_bytes[i] = cpu_to_le64(ts->io_bytes[i]);
710 p.ts.runtime[i] = cpu_to_le64(ts->runtime[i]);
711 }
712
713 p.ts.total_run_time = cpu_to_le64(ts->total_run_time);
714 p.ts.continue_on_error = cpu_to_le16(ts->continue_on_error);
715 p.ts.total_err_count = cpu_to_le64(ts->total_err_count);
716 p.ts.first_error = cpu_to_le32(ts->first_error);
717 p.ts.kb_base = cpu_to_le32(ts->kb_base);
718
719 convert_gs(&p.rs, rs);
720
721 fio_net_send_cmd(server_fd, FIO_NET_CMD_TS, &p, sizeof(p), 0);
722}
723
724void fio_server_send_gs(struct group_run_stats *rs)
725{
726 struct group_run_stats gs;
727
728 dprint(FD_NET, "server sending group run stats\n");
729
730 convert_gs(&gs, rs);
731 fio_net_send_cmd(server_fd, FIO_NET_CMD_GS, &gs, sizeof(gs), 0);
732}
733
734static void convert_agg(struct disk_util_agg *dst, struct disk_util_agg *src)
735{
736 int i;
737
738 for (i = 0; i < 2; i++) {
739 dst->ios[i] = cpu_to_le32(src->ios[i]);
740 dst->merges[i] = cpu_to_le32(src->merges[i]);
741 dst->sectors[i] = cpu_to_le64(src->sectors[i]);
742 dst->ticks[i] = cpu_to_le32(src->ticks[i]);
743 }
744
745 dst->io_ticks = cpu_to_le32(src->io_ticks);
746 dst->time_in_queue = cpu_to_le32(src->time_in_queue);
747 dst->slavecount = cpu_to_le32(src->slavecount);
748 dst->max_util.u.i = __cpu_to_le64(fio_double_to_uint64(src->max_util.u.f));
749}
750
751static void convert_dus(struct disk_util_stat *dst, struct disk_util_stat *src)
752{
753 int i;
754
755 strcpy((char *) dst->name, (char *) src->name);
756
757 for (i = 0; i < 2; i++) {
758 dst->ios[i] = cpu_to_le32(src->ios[i]);
759 dst->merges[i] = cpu_to_le32(src->merges[i]);
760 dst->sectors[i] = cpu_to_le64(src->sectors[i]);
761 dst->ticks[i] = cpu_to_le32(src->ticks[i]);
762 }
763
764 dst->io_ticks = cpu_to_le32(src->io_ticks);
765 dst->time_in_queue = cpu_to_le32(src->time_in_queue);
766 dst->msec = cpu_to_le64(src->msec);
767}
768
769void fio_server_send_du(void)
770{
771 struct disk_util *du;
772 struct flist_head *entry;
773 struct cmd_du_pdu pdu;
774
775 dprint(FD_NET, "server: sending disk_util %d\n", !flist_empty(&disk_list));
776
777 memset(&pdu, 0, sizeof(pdu));
778
779 flist_for_each(entry, &disk_list) {
780 du = flist_entry(entry, struct disk_util, list);
781
782 convert_dus(&pdu.dus, &du->dus);
783 convert_agg(&pdu.agg, &du->agg);
784
785 fio_net_send_cmd(server_fd, FIO_NET_CMD_DU, &pdu, sizeof(pdu), 0);
786 }
787}
788
789int fio_server_log(const char *format, ...)
790{
791 char buffer[1024];
792 va_list args;
793 size_t len;
794
795 dprint(FD_NET, "server log\n");
796
797 va_start(args, format);
798 len = vsnprintf(buffer, sizeof(buffer), format, args);
799 va_end(args);
800
801 return fio_server_text_output(buffer, len);
802}
803
804static int fio_init_server_ip(void)
805{
806 int sk, opt;
807
808 sk = socket(AF_INET, SOCK_STREAM, 0);
809 if (sk < 0) {
810 log_err("fio: socket: %s\n", strerror(errno));
811 return -1;
812 }
813
814 opt = 1;
815 if (setsockopt(sk, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)) < 0) {
816 log_err("fio: setsockopt: %s\n", strerror(errno));
817 close(sk);
818 return -1;
819 }
820#ifdef SO_REUSEPORT
821 if (setsockopt(sk, SOL_SOCKET, SO_REUSEPORT, &opt, sizeof(opt)) < 0) {
822 log_err("fio: setsockopt: %s\n", strerror(errno));
823 close(sk);
824 return -1;
825 }
826#endif
827
828 saddr_in.sin_family = AF_INET;
829
830 if (bind(sk, (struct sockaddr *) &saddr_in, sizeof(saddr_in)) < 0) {
831 log_err("fio: bind: %s\n", strerror(errno));
832 close(sk);
833 return -1;
834 }
835
836 return sk;
837}
838
839static int fio_init_server_sock(void)
840{
841 struct sockaddr_un addr;
842 fio_socklen_t len;
843 mode_t mode;
844 int sk;
845
846 sk = socket(AF_UNIX, SOCK_STREAM, 0);
847 if (sk < 0) {
848 log_err("fio: socket: %s\n", strerror(errno));
849 return -1;
850 }
851
852 mode = umask(000);
853
854 memset(&addr, 0, sizeof(addr));
855 addr.sun_family = AF_UNIX;
856 strcpy(addr.sun_path, bind_sock);
857 unlink(bind_sock);
858
859 len = sizeof(addr.sun_family) + strlen(bind_sock) + 1;
860
861 if (bind(sk, (struct sockaddr *) &addr, len) < 0) {
862 log_err("fio: bind: %s\n", strerror(errno));
863 close(sk);
864 return -1;
865 }
866
867 umask(mode);
868 return sk;
869}
870
871static int fio_init_server_connection(void)
872{
873 char bind_str[128];
874 int sk;
875
876 dprint(FD_NET, "starting server\n");
877
878 if (!bind_sock)
879 sk = fio_init_server_ip();
880 else
881 sk = fio_init_server_sock();
882
883 if (sk < 0)
884 return sk;
885
886 if (!bind_sock)
887 sprintf(bind_str, "%s:%u", inet_ntoa(saddr_in.sin_addr), fio_net_port);
888 else
889 strcpy(bind_str, bind_sock);
890
891 log_info("fio: server listening on %s\n", bind_str);
892
893 if (listen(sk, 0) < 0) {
894 log_err("fio: listen: %s\n", strerror(errno));
895 return -1;
896 }
897
898 return sk;
899}
900
901int fio_server_parse_string(const char *str, char **ptr, int *is_sock,
902 int *port, struct in_addr *inp)
903{
904 *ptr = NULL;
905 *is_sock = 0;
906 *port = fio_net_port;
907
908 if (!strncmp(str, "sock:", 5)) {
909 *ptr = strdup(str + 5);
910 *is_sock = 1;
911 } else {
912 const char *host = str;
913 char *portp;
914 int lport = 0;
915
916 /*
917 * Is it ip:<ip or host>:port
918 */
919 if (!strncmp(host, "ip:", 3))
920 host += 3;
921 else if (host[0] == ':') {
922 /* String is :port */
923 host++;
924 lport = atoi(host);
925 if (!lport || lport > 65535) {
926 log_err("fio: bad server port %u\n", port);
927 return 1;
928 }
929 /* no hostname given, we are done */
930 *port = lport;
931 return 0;
932 }
933
934 /*
935 * If no port seen yet, check if there's a last ':' at the end
936 */
937 if (!lport) {
938 portp = strchr(host, ':');
939 if (portp) {
940 *portp = '\0';
941 portp++;
942 lport = atoi(portp);
943 if (!lport || lport > 65535) {
944 log_err("fio: bad server port %u\n", port);
945 return 1;
946 }
947 }
948 }
949
950 if (lport)
951 *port = lport;
952
953 *ptr = strdup(host);
954
955 if (inet_aton(host, inp) != 1) {
956 struct hostent *hent;
957
958 hent = gethostbyname(host);
959 if (!hent) {
960 free(*ptr);
961 *ptr = NULL;
962 return 1;
963 }
964
965 memcpy(inp, hent->h_addr, 4);
966 }
967 }
968
969 if (*port == 0)
970 *port = fio_net_port;
971
972 return 0;
973}
974
975/*
976 * Server arg should be one of:
977 *
978 * sock:/path/to/socket
979 * ip:1.2.3.4
980 * 1.2.3.4
981 *
982 * Where sock uses unix domain sockets, and ip binds the server to
983 * a specific interface. If no arguments are given to the server, it
984 * uses IP and binds to 0.0.0.0.
985 *
986 */
987static int fio_handle_server_arg(void)
988{
989 int port = fio_net_port;
990 int is_sock, ret = 0;
991
992 saddr_in.sin_addr.s_addr = htonl(INADDR_ANY);
993
994 if (!fio_server_arg)
995 goto out;
996
997 ret = fio_server_parse_string(fio_server_arg, &bind_sock, &is_sock,
998 &port, &saddr_in.sin_addr);
999
1000 if (!is_sock && bind_sock) {
1001 free(bind_sock);
1002 bind_sock = NULL;
1003 }
1004
1005out:
1006 fio_net_port = port;
1007 saddr_in.sin_port = htons(port);
1008 return ret;
1009}
1010
1011static int fio_server(void)
1012{
1013 int sk, ret;
1014
1015 dprint(FD_NET, "starting server\n");
1016
1017 if (fio_handle_server_arg())
1018 return -1;
1019
1020 sk = fio_init_server_connection();
1021 if (sk < 0)
1022 return -1;
1023
1024 ret = accept_loop(sk);
1025
1026 close(sk);
1027
1028 if (fio_server_arg) {
1029 free(fio_server_arg);
1030 fio_server_arg = NULL;
1031 }
1032 if (bind_sock)
1033 free(bind_sock);
1034
1035 return ret;
1036}
1037
1038void fio_server_got_signal(int signal)
1039{
1040 if (signal == SIGPIPE)
1041 server_fd = -1;
1042 else {
1043 log_info("\nfio: terminating on signal %d\n", signal);
1044 exit_backend = 1;
1045 }
1046}
1047
1048static int check_existing_pidfile(const char *pidfile)
1049{
1050 struct stat sb;
1051 char buf[16];
1052 pid_t pid;
1053 FILE *f;
1054
1055 if (stat(pidfile, &sb))
1056 return 0;
1057
1058 f = fopen(pidfile, "r");
1059 if (!f)
1060 return 0;
1061
1062 if (fread(buf, sb.st_size, 1, f) <= 0) {
1063 fclose(f);
1064 return 1;
1065 }
1066 fclose(f);
1067
1068 pid = atoi(buf);
1069 if (kill(pid, SIGCONT) < 0)
1070 return errno != ESRCH;
1071
1072 return 1;
1073}
1074
1075static int write_pid(pid_t pid, const char *pidfile)
1076{
1077 FILE *fpid;
1078
1079 fpid = fopen(pidfile, "w");
1080 if (!fpid) {
1081 log_err("fio: failed opening pid file %s\n", pidfile);
1082 return 1;
1083 }
1084
1085 fprintf(fpid, "%u\n", (unsigned int) pid);
1086 fclose(fpid);
1087 return 0;
1088}
1089
1090/*
1091 * If pidfile is specified, background us.
1092 */
1093int fio_start_server(char *pidfile)
1094{
1095 pid_t pid;
1096 int ret;
1097
1098 if (!pidfile)
1099 return fio_server();
1100
1101 if (check_existing_pidfile(pidfile)) {
1102 log_err("fio: pidfile %s exists and server appears alive\n",
1103 pidfile);
1104 return -1;
1105 }
1106
1107 pid = fork();
1108 if (pid < 0) {
1109 log_err("fio: failed server fork: %s", strerror(errno));
1110 free(pidfile);
1111 return -1;
1112 } else if (pid) {
1113 int ret = write_pid(pid, pidfile);
1114
1115 exit(ret);
1116 }
1117
1118 setsid();
1119 openlog("fio", LOG_NDELAY|LOG_NOWAIT|LOG_PID, LOG_USER);
1120 log_syslog = 1;
1121 close(STDIN_FILENO);
1122 close(STDOUT_FILENO);
1123 close(STDERR_FILENO);
1124 f_out = NULL;
1125 f_err = NULL;
1126
1127 ret = fio_server();
1128
1129 closelog();
1130 unlink(pidfile);
1131 free(pidfile);
1132 return ret;
1133}
1134
1135void fio_server_set_arg(const char *arg)
1136{
1137 fio_server_arg = strdup(arg);
1138}
fio - Flexible IO Tester