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Add support for randomness of any IO direction
[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 <sys/uio.h>
15#include <netinet/in.h>
16#include <arpa/inet.h>
17#include <netdb.h>
18#include <syslog.h>
19#include <signal.h>
20#ifdef CONFIG_ZLIB
21#include <zlib.h>
22#endif
23
24#include "fio.h"
25#include "server.h"
26#include "crc/crc16.h"
27#include "lib/ieee754.h"
28
29int fio_net_port = FIO_NET_PORT;
30
31int exit_backend = 0;
32
33static int server_fd = -1;
34static char *fio_server_arg;
35static char *bind_sock;
36static struct sockaddr_in saddr_in;
37static struct sockaddr_in6 saddr_in6;
38static int use_ipv6;
39#ifdef CONFIG_ZLIB
40static unsigned int has_zlib = 1;
41#else
42static unsigned int has_zlib = 0;
43#endif
44static unsigned int use_zlib;
45
46struct fio_fork_item {
47 struct flist_head list;
48 int exitval;
49 int signal;
50 int exited;
51 pid_t pid;
52};
53
54/* Created on fork on new connection */
55static FLIST_HEAD(conn_list);
56
57/* Created on job fork from connection */
58static FLIST_HEAD(job_list);
59
60static const char *fio_server_ops[FIO_NET_CMD_NR] = {
61 "",
62 "QUIT",
63 "EXIT",
64 "JOB",
65 "JOBLINE",
66 "TEXT",
67 "TS",
68 "GS",
69 "SEND_ETA",
70 "ETA",
71 "PROBE",
72 "START",
73 "STOP",
74 "DISK_UTIL",
75 "SERVER_START",
76 "ADD_JOB",
77 "CMD_RUN"
78 "CMD_IOLOG",
79};
80
81const char *fio_server_op(unsigned int op)
82{
83 static char buf[32];
84
85 if (op < FIO_NET_CMD_NR)
86 return fio_server_ops[op];
87
88 sprintf(buf, "UNKNOWN/%d", op);
89 return buf;
90}
91
92static ssize_t iov_total_len(const struct iovec *iov, int count)
93{
94 ssize_t ret = 0;
95
96 while (count--) {
97 ret += iov->iov_len;
98 iov++;
99 }
100
101 return ret;
102}
103
104static int fio_sendv_data(int sk, struct iovec *iov, int count)
105{
106 ssize_t total_len = iov_total_len(iov, count);
107 ssize_t ret;
108
109 do {
110 ret = writev(sk, iov, count);
111 if (ret > 0) {
112 total_len -= ret;
113 if (!total_len)
114 break;
115
116 while (ret) {
117 if (ret >= iov->iov_len) {
118 ret -= iov->iov_len;
119 iov++;
120 continue;
121 }
122 iov->iov_base += ret;
123 iov->iov_len -= ret;
124 ret = 0;
125 }
126 } else if (!ret)
127 break;
128 else if (errno == EAGAIN || errno == EINTR)
129 continue;
130 else
131 break;
132 } while (!exit_backend);
133
134 if (!total_len)
135 return 0;
136
137 if (errno)
138 return -errno;
139
140 return 1;
141}
142
143int fio_send_data(int sk, const void *p, unsigned int len)
144{
145 struct iovec iov = { .iov_base = (void *) p, .iov_len = len };
146
147 assert(len <= sizeof(struct fio_net_cmd) + FIO_SERVER_MAX_FRAGMENT_PDU);
148
149 return fio_sendv_data(sk, &iov, 1);
150}
151
152int fio_recv_data(int sk, void *p, unsigned int len)
153{
154 do {
155 int ret = recv(sk, p, len, MSG_WAITALL);
156
157 if (ret > 0) {
158 len -= ret;
159 if (!len)
160 break;
161 p += ret;
162 continue;
163 } else if (!ret)
164 break;
165 else if (errno == EAGAIN || errno == EINTR)
166 continue;
167 else
168 break;
169 } while (!exit_backend);
170
171 if (!len)
172 return 0;
173
174 return -1;
175}
176
177static int verify_convert_cmd(struct fio_net_cmd *cmd)
178{
179 uint16_t crc;
180
181 cmd->cmd_crc16 = le16_to_cpu(cmd->cmd_crc16);
182 cmd->pdu_crc16 = le16_to_cpu(cmd->pdu_crc16);
183
184 crc = fio_crc16(cmd, FIO_NET_CMD_CRC_SZ);
185 if (crc != cmd->cmd_crc16) {
186 log_err("fio: server bad crc on command (got %x, wanted %x)\n",
187 cmd->cmd_crc16, crc);
188 return 1;
189 }
190
191 cmd->version = le16_to_cpu(cmd->version);
192 cmd->opcode = le16_to_cpu(cmd->opcode);
193 cmd->flags = le32_to_cpu(cmd->flags);
194 cmd->tag = le64_to_cpu(cmd->tag);
195 cmd->pdu_len = le32_to_cpu(cmd->pdu_len);
196
197 switch (cmd->version) {
198 case FIO_SERVER_VER:
199 break;
200 default:
201 log_err("fio: bad server cmd version %d\n", cmd->version);
202 return 1;
203 }
204
205 if (cmd->pdu_len > FIO_SERVER_MAX_FRAGMENT_PDU) {
206 log_err("fio: command payload too large: %u\n", cmd->pdu_len);
207 return 1;
208 }
209
210 return 0;
211}
212
213/*
214 * Read (and defragment, if necessary) incoming commands
215 */
216struct fio_net_cmd *fio_net_recv_cmd(int sk)
217{
218 struct fio_net_cmd cmd, *cmdret = NULL;
219 size_t cmd_size = 0, pdu_offset = 0;
220 uint16_t crc;
221 int ret, first = 1;
222 void *pdu = NULL;
223
224 do {
225 ret = fio_recv_data(sk, &cmd, sizeof(cmd));
226 if (ret)
227 break;
228
229 /* We have a command, verify it and swap if need be */
230 ret = verify_convert_cmd(&cmd);
231 if (ret)
232 break;
233
234 if (first) {
235 /* if this is text, add room for \0 at the end */
236 cmd_size = sizeof(cmd) + cmd.pdu_len + 1;
237 assert(!cmdret);
238 } else
239 cmd_size += cmd.pdu_len;
240
241 cmdret = realloc(cmdret, cmd_size);
242
243 if (first)
244 memcpy(cmdret, &cmd, sizeof(cmd));
245 else if (cmdret->opcode != cmd.opcode) {
246 log_err("fio: fragment opcode mismatch (%d != %d)\n",
247 cmdret->opcode, cmd.opcode);
248 ret = 1;
249 break;
250 }
251
252 if (!cmd.pdu_len)
253 break;
254
255 /* There's payload, get it */
256 pdu = (void *) cmdret->payload + pdu_offset;
257 ret = fio_recv_data(sk, pdu, cmd.pdu_len);
258 if (ret)
259 break;
260
261 /* Verify payload crc */
262 crc = fio_crc16(pdu, cmd.pdu_len);
263 if (crc != cmd.pdu_crc16) {
264 log_err("fio: server bad crc on payload ");
265 log_err("(got %x, wanted %x)\n", cmd.pdu_crc16, crc);
266 ret = 1;
267 break;
268 }
269
270 pdu_offset += cmd.pdu_len;
271 if (!first)
272 cmdret->pdu_len += cmd.pdu_len;
273 first = 0;
274 } while (cmd.flags & FIO_NET_CMD_F_MORE);
275
276 if (ret) {
277 free(cmdret);
278 cmdret = NULL;
279 } else if (cmdret) {
280 /* zero-terminate text input */
281 if (cmdret->pdu_len) {
282 if (cmdret->opcode == FIO_NET_CMD_TEXT) {
283 struct cmd_text_pdu *pdu = (struct cmd_text_pdu *) cmdret->payload;
284 char *buf = (char *) pdu->buf;
285
286 buf[pdu->buf_len] = '\0';
287 } else if (cmdret->opcode == FIO_NET_CMD_JOB) {
288 struct cmd_job_pdu *pdu = (struct cmd_job_pdu *) cmdret->payload;
289 char *buf = (char *) pdu->buf;
290 int len = le32_to_cpu(pdu->buf_len);
291
292 buf[len] = '\0';
293 }
294 }
295
296 /* frag flag is internal */
297 cmdret->flags &= ~FIO_NET_CMD_F_MORE;
298 }
299
300 return cmdret;
301}
302
303static void add_reply(uint64_t tag, struct flist_head *list)
304{
305 struct fio_net_cmd_reply *reply;
306
307 reply = (struct fio_net_cmd_reply *) (uintptr_t) tag;
308 flist_add_tail(&reply->list, list);
309}
310
311static uint64_t alloc_reply(uint64_t tag, uint16_t opcode)
312{
313 struct fio_net_cmd_reply *reply;
314
315 reply = calloc(1, sizeof(*reply));
316 INIT_FLIST_HEAD(&reply->list);
317 gettimeofday(&reply->tv, NULL);
318 reply->saved_tag = tag;
319 reply->opcode = opcode;
320
321 return (uintptr_t) reply;
322}
323
324static void free_reply(uint64_t tag)
325{
326 struct fio_net_cmd_reply *reply;
327
328 reply = (struct fio_net_cmd_reply *) (uintptr_t) tag;
329 free(reply);
330}
331
332void fio_net_cmd_crc_pdu(struct fio_net_cmd *cmd, const void *pdu)
333{
334 uint32_t pdu_len;
335
336 cmd->cmd_crc16 = __cpu_to_le16(fio_crc16(cmd, FIO_NET_CMD_CRC_SZ));
337
338 pdu_len = le32_to_cpu(cmd->pdu_len);
339 cmd->pdu_crc16 = __cpu_to_le16(fio_crc16(pdu, pdu_len));
340}
341
342void fio_net_cmd_crc(struct fio_net_cmd *cmd)
343{
344 fio_net_cmd_crc_pdu(cmd, cmd->payload);
345}
346
347int fio_net_send_cmd(int fd, uint16_t opcode, const void *buf, off_t size,
348 uint64_t *tagptr, struct flist_head *list)
349{
350 struct fio_net_cmd *cmd = NULL;
351 size_t this_len, cur_len = 0;
352 uint64_t tag;
353 int ret;
354
355 if (list) {
356 assert(tagptr);
357 tag = *tagptr = alloc_reply(*tagptr, opcode);
358 } else
359 tag = tagptr ? *tagptr : 0;
360
361 do {
362 this_len = size;
363 if (this_len > FIO_SERVER_MAX_FRAGMENT_PDU)
364 this_len = FIO_SERVER_MAX_FRAGMENT_PDU;
365
366 if (!cmd || cur_len < sizeof(*cmd) + this_len) {
367 if (cmd)
368 free(cmd);
369
370 cur_len = sizeof(*cmd) + this_len;
371 cmd = malloc(cur_len);
372 }
373
374 fio_init_net_cmd(cmd, opcode, buf, this_len, tag);
375
376 if (this_len < size)
377 cmd->flags = __cpu_to_le32(FIO_NET_CMD_F_MORE);
378
379 fio_net_cmd_crc(cmd);
380
381 ret = fio_send_data(fd, cmd, sizeof(*cmd) + this_len);
382 size -= this_len;
383 buf += this_len;
384 } while (!ret && size);
385
386 if (list) {
387 if (ret)
388 free_reply(tag);
389 else
390 add_reply(tag, list);
391 }
392
393 if (cmd)
394 free(cmd);
395
396 return ret;
397}
398
399static int fio_net_send_simple_stack_cmd(int sk, uint16_t opcode, uint64_t tag)
400{
401 struct fio_net_cmd cmd;
402
403 fio_init_net_cmd(&cmd, opcode, NULL, 0, tag);
404 fio_net_cmd_crc(&cmd);
405
406 return fio_send_data(sk, &cmd, sizeof(cmd));
407}
408
409/*
410 * If 'list' is non-NULL, then allocate and store the sent command for
411 * later verification.
412 */
413int fio_net_send_simple_cmd(int sk, uint16_t opcode, uint64_t tag,
414 struct flist_head *list)
415{
416 int ret;
417
418 if (list)
419 tag = alloc_reply(tag, opcode);
420
421 ret = fio_net_send_simple_stack_cmd(sk, opcode, tag);
422 if (ret) {
423 if (list)
424 free_reply(tag);
425
426 return ret;
427 }
428
429 if (list)
430 add_reply(tag, list);
431
432 return 0;
433}
434
435int fio_net_send_quit(int sk)
436{
437 dprint(FD_NET, "server: sending quit\n");
438
439 return fio_net_send_simple_cmd(sk, FIO_NET_CMD_QUIT, 0, NULL);
440}
441
442static int fio_net_send_ack(int sk, struct fio_net_cmd *cmd, int error,
443 int signal)
444{
445 struct cmd_end_pdu epdu;
446 uint64_t tag = 0;
447
448 if (cmd)
449 tag = cmd->tag;
450
451 epdu.error = __cpu_to_le32(error);
452 epdu.signal = __cpu_to_le32(signal);
453 return fio_net_send_cmd(sk, FIO_NET_CMD_STOP, &epdu, sizeof(epdu), &tag, NULL);
454}
455
456int fio_net_send_stop(int sk, int error, int signal)
457{
458 dprint(FD_NET, "server: sending stop (%d, %d)\n", error, signal);
459 return fio_net_send_ack(sk, NULL, error, signal);
460}
461
462static void fio_server_add_fork_item(pid_t pid, struct flist_head *list)
463{
464 struct fio_fork_item *ffi;
465
466 ffi = malloc(sizeof(*ffi));
467 ffi->exitval = 0;
468 ffi->signal = 0;
469 ffi->exited = 0;
470 ffi->pid = pid;
471 flist_add_tail(&ffi->list, list);
472}
473
474static void fio_server_add_conn_pid(pid_t pid)
475{
476 dprint(FD_NET, "server: forked off connection job (pid=%u)\n", pid);
477 fio_server_add_fork_item(pid, &conn_list);
478}
479
480static void fio_server_add_job_pid(pid_t pid)
481{
482 dprint(FD_NET, "server: forked off job job (pid=%u)\n", pid);
483 fio_server_add_fork_item(pid, &job_list);
484}
485
486static void fio_server_check_fork_item(struct fio_fork_item *ffi)
487{
488 int ret, status;
489
490 ret = waitpid(ffi->pid, &status, WNOHANG);
491 if (ret < 0) {
492 if (errno == ECHILD) {
493 log_err("fio: connection pid %u disappeared\n", ffi->pid);
494 ffi->exited = 1;
495 } else
496 log_err("fio: waitpid: %s\n", strerror(errno));
497 } else if (ret == ffi->pid) {
498 if (WIFSIGNALED(status)) {
499 ffi->signal = WTERMSIG(status);
500 ffi->exited = 1;
501 }
502 if (WIFEXITED(status)) {
503 if (WEXITSTATUS(status))
504 ffi->exitval = WEXITSTATUS(status);
505 ffi->exited = 1;
506 }
507 }
508}
509
510static void fio_server_fork_item_done(struct fio_fork_item *ffi)
511{
512 dprint(FD_NET, "pid %u exited, sig=%u, exitval=%d\n", ffi->pid, ffi->signal, ffi->exitval);
513
514 /*
515 * Fold STOP and QUIT...
516 */
517 fio_net_send_stop(server_fd, ffi->exitval, ffi->signal);
518 fio_net_send_quit(server_fd);
519 flist_del(&ffi->list);
520 free(ffi);
521}
522
523static void fio_server_check_fork_items(struct flist_head *list)
524{
525 struct flist_head *entry, *tmp;
526 struct fio_fork_item *ffi;
527
528 flist_for_each_safe(entry, tmp, list) {
529 ffi = flist_entry(entry, struct fio_fork_item, list);
530
531 fio_server_check_fork_item(ffi);
532
533 if (ffi->exited)
534 fio_server_fork_item_done(ffi);
535 }
536}
537
538static void fio_server_check_jobs(void)
539{
540 fio_server_check_fork_items(&job_list);
541}
542
543static void fio_server_check_conns(void)
544{
545 fio_server_check_fork_items(&conn_list);
546}
547
548static int handle_run_cmd(struct fio_net_cmd *cmd)
549{
550 pid_t pid;
551 int ret;
552
553 set_genesis_time();
554
555 pid = fork();
556 if (pid) {
557 fio_server_add_job_pid(pid);
558 return 0;
559 }
560
561 ret = fio_backend();
562 free_threads_shm();
563 _exit(ret);
564}
565
566static int handle_job_cmd(struct fio_net_cmd *cmd)
567{
568 struct cmd_job_pdu *pdu = (struct cmd_job_pdu *) cmd->payload;
569 void *buf = pdu->buf;
570 struct cmd_start_pdu spdu;
571
572 pdu->buf_len = le32_to_cpu(pdu->buf_len);
573 pdu->client_type = le32_to_cpu(pdu->client_type);
574
575 if (parse_jobs_ini(buf, 1, 0, pdu->client_type)) {
576 fio_net_send_quit(server_fd);
577 return -1;
578 }
579
580 spdu.jobs = cpu_to_le32(thread_number);
581 spdu.stat_outputs = cpu_to_le32(stat_number);
582 fio_net_send_cmd(server_fd, FIO_NET_CMD_START, &spdu, sizeof(spdu), NULL, NULL);
583 return 0;
584}
585
586static int handle_jobline_cmd(struct fio_net_cmd *cmd)
587{
588 void *pdu = cmd->payload;
589 struct cmd_single_line_pdu *cslp;
590 struct cmd_line_pdu *clp;
591 unsigned long offset;
592 struct cmd_start_pdu spdu;
593 char **argv;
594 int i;
595
596 clp = pdu;
597 clp->lines = le16_to_cpu(clp->lines);
598 clp->client_type = le16_to_cpu(clp->client_type);
599 argv = malloc(clp->lines * sizeof(char *));
600 offset = sizeof(*clp);
601
602 dprint(FD_NET, "server: %d command line args\n", clp->lines);
603
604 for (i = 0; i < clp->lines; i++) {
605 cslp = pdu + offset;
606 argv[i] = (char *) cslp->text;
607
608 offset += sizeof(*cslp) + le16_to_cpu(cslp->len);
609 dprint(FD_NET, "server: %d: %s\n", i, argv[i]);
610 }
611
612 if (parse_cmd_line(clp->lines, argv, clp->client_type)) {
613 fio_net_send_quit(server_fd);
614 free(argv);
615 return -1;
616 }
617
618 free(argv);
619
620 spdu.jobs = cpu_to_le32(thread_number);
621 spdu.stat_outputs = cpu_to_le32(stat_number);
622 fio_net_send_cmd(server_fd, FIO_NET_CMD_START, &spdu, sizeof(spdu), NULL, NULL);
623 return 0;
624}
625
626static int handle_probe_cmd(struct fio_net_cmd *cmd)
627{
628 struct cmd_client_probe_pdu *pdu = (struct cmd_client_probe_pdu *) cmd->payload;
629 struct cmd_probe_reply_pdu probe;
630 uint64_t tag = cmd->tag;
631
632 dprint(FD_NET, "server: sending probe reply\n");
633
634 memset(&probe, 0, sizeof(probe));
635 gethostname((char *) probe.hostname, sizeof(probe.hostname));
636#ifdef CONFIG_BIG_ENDIAN
637 probe.bigendian = 1;
638#endif
639 strncpy((char *) probe.fio_version, fio_version_string, sizeof(probe.fio_version));
640
641 probe.os = FIO_OS;
642 probe.arch = FIO_ARCH;
643 probe.bpp = sizeof(void *);
644 probe.cpus = __cpu_to_le32(cpus_online());
645
646 /*
647 * If the client supports compression and we do too, then enable it
648 */
649 if (has_zlib && le64_to_cpu(pdu->flags) & FIO_PROBE_FLAG_ZLIB) {
650 probe.flags = __cpu_to_le64(FIO_PROBE_FLAG_ZLIB);
651 use_zlib = 1;
652 } else {
653 probe.flags = 0;
654 use_zlib = 0;
655 }
656
657 return fio_net_send_cmd(server_fd, FIO_NET_CMD_PROBE, &probe, sizeof(probe), &tag, NULL);
658}
659
660static int handle_send_eta_cmd(struct fio_net_cmd *cmd)
661{
662 struct jobs_eta *je;
663 size_t size;
664 uint64_t tag = cmd->tag;
665 int i;
666
667 if (!thread_number)
668 return 0;
669
670 size = sizeof(*je) + thread_number * sizeof(char) + 1;
671 je = malloc(size);
672 memset(je, 0, size);
673
674 if (!calc_thread_status(je, 1)) {
675 free(je);
676 return 0;
677 }
678
679 dprint(FD_NET, "server sending status\n");
680
681 je->nr_running = cpu_to_le32(je->nr_running);
682 je->nr_ramp = cpu_to_le32(je->nr_ramp);
683 je->nr_pending = cpu_to_le32(je->nr_pending);
684 je->nr_setting_up = cpu_to_le32(je->nr_setting_up);
685 je->files_open = cpu_to_le32(je->files_open);
686
687 for (i = 0; i < DDIR_RWDIR_CNT; i++) {
688 je->m_rate[i] = cpu_to_le32(je->m_rate[i]);
689 je->t_rate[i] = cpu_to_le32(je->t_rate[i]);
690 je->m_iops[i] = cpu_to_le32(je->m_iops[i]);
691 je->t_iops[i] = cpu_to_le32(je->t_iops[i]);
692 je->rate[i] = cpu_to_le32(je->rate[i]);
693 je->iops[i] = cpu_to_le32(je->iops[i]);
694 }
695
696 je->elapsed_sec = cpu_to_le64(je->elapsed_sec);
697 je->eta_sec = cpu_to_le64(je->eta_sec);
698 je->nr_threads = cpu_to_le32(je->nr_threads);
699 je->is_pow2 = cpu_to_le32(je->is_pow2);
700 je->unit_base = cpu_to_le32(je->unit_base);
701
702 fio_net_send_cmd(server_fd, FIO_NET_CMD_ETA, je, size, &tag, NULL);
703 free(je);
704 return 0;
705}
706
707static int send_update_job_reply(int fd, uint64_t __tag, int error)
708{
709 uint64_t tag = __tag;
710 uint32_t pdu_error;
711
712 pdu_error = __cpu_to_le32(error);
713 return fio_net_send_cmd(fd, FIO_NET_CMD_UPDATE_JOB, &pdu_error, sizeof(pdu_error), &tag, NULL);
714}
715
716static int handle_update_job_cmd(struct fio_net_cmd *cmd)
717{
718 struct cmd_add_job_pdu *pdu = (struct cmd_add_job_pdu *) cmd->payload;
719 struct thread_data *td;
720 uint32_t tnumber;
721
722 tnumber = le32_to_cpu(pdu->thread_number);
723
724 dprint(FD_NET, "server: updating options for job %u\n", tnumber);
725
726 if (!tnumber || tnumber > thread_number) {
727 send_update_job_reply(server_fd, cmd->tag, ENODEV);
728 return 0;
729 }
730
731 td = &threads[tnumber - 1];
732 convert_thread_options_to_cpu(&td->o, &pdu->top);
733 send_update_job_reply(server_fd, cmd->tag, 0);
734 return 0;
735}
736
737static int handle_command(struct fio_net_cmd *cmd)
738{
739 int ret;
740
741 dprint(FD_NET, "server: got op [%s], pdu=%u, tag=%llx\n",
742 fio_server_op(cmd->opcode), cmd->pdu_len,
743 (unsigned long long) cmd->tag);
744
745 switch (cmd->opcode) {
746 case FIO_NET_CMD_QUIT:
747 fio_terminate_threads(TERMINATE_ALL);
748 return -1;
749 case FIO_NET_CMD_EXIT:
750 exit_backend = 1;
751 return -1;
752 case FIO_NET_CMD_JOB:
753 ret = handle_job_cmd(cmd);
754 break;
755 case FIO_NET_CMD_JOBLINE:
756 ret = handle_jobline_cmd(cmd);
757 break;
758 case FIO_NET_CMD_PROBE:
759 ret = handle_probe_cmd(cmd);
760 break;
761 case FIO_NET_CMD_SEND_ETA:
762 ret = handle_send_eta_cmd(cmd);
763 break;
764 case FIO_NET_CMD_RUN:
765 ret = handle_run_cmd(cmd);
766 break;
767 case FIO_NET_CMD_UPDATE_JOB:
768 ret = handle_update_job_cmd(cmd);
769 break;
770 default:
771 log_err("fio: unknown opcode: %s\n", fio_server_op(cmd->opcode));
772 ret = 1;
773 }
774
775 return ret;
776}
777
778static int handle_connection(int sk)
779{
780 struct fio_net_cmd *cmd = NULL;
781 int ret = 0;
782
783 reset_fio_state();
784 INIT_FLIST_HEAD(&job_list);
785 server_fd = sk;
786
787 /* read forever */
788 while (!exit_backend) {
789 struct pollfd pfd = {
790 .fd = sk,
791 .events = POLLIN,
792 };
793
794 ret = 0;
795 do {
796 int timeout = 1000;
797
798 if (!flist_empty(&job_list))
799 timeout = 100;
800
801 ret = poll(&pfd, 1, timeout);
802 if (ret < 0) {
803 if (errno == EINTR)
804 break;
805 log_err("fio: poll: %s\n", strerror(errno));
806 break;
807 } else if (!ret) {
808 fio_server_check_jobs();
809 continue;
810 }
811
812 if (pfd.revents & POLLIN)
813 break;
814 if (pfd.revents & (POLLERR|POLLHUP)) {
815 ret = 1;
816 break;
817 }
818 } while (!exit_backend);
819
820 fio_server_check_jobs();
821
822 if (ret < 0)
823 break;
824
825 cmd = fio_net_recv_cmd(sk);
826 if (!cmd) {
827 ret = -1;
828 break;
829 }
830
831 ret = handle_command(cmd);
832 if (ret)
833 break;
834
835 free(cmd);
836 cmd = NULL;
837 }
838
839 if (cmd)
840 free(cmd);
841
842 close(sk);
843 _exit(ret);
844}
845
846static int accept_loop(int listen_sk)
847{
848 struct sockaddr_in addr;
849 socklen_t len = sizeof(addr);
850 struct pollfd pfd;
851 int ret = 0, sk, flags, exitval = 0;
852
853 dprint(FD_NET, "server enter accept loop\n");
854
855 flags = fcntl(listen_sk, F_GETFL);
856 flags |= O_NONBLOCK;
857 fcntl(listen_sk, F_SETFL, flags);
858
859 while (!exit_backend) {
860 pid_t pid;
861
862 pfd.fd = listen_sk;
863 pfd.events = POLLIN;
864 do {
865 int timeout = 1000;
866
867 if (!flist_empty(&conn_list))
868 timeout = 100;
869
870 ret = poll(&pfd, 1, timeout);
871 if (ret < 0) {
872 if (errno == EINTR)
873 break;
874 log_err("fio: poll: %s\n", strerror(errno));
875 break;
876 } else if (!ret) {
877 fio_server_check_conns();
878 continue;
879 }
880
881 if (pfd.revents & POLLIN)
882 break;
883 } while (!exit_backend);
884
885 fio_server_check_conns();
886
887 if (exit_backend || ret < 0)
888 break;
889
890 sk = accept(listen_sk, (struct sockaddr *) &addr, &len);
891 if (sk < 0) {
892 log_err("fio: accept: %s\n", strerror(errno));
893 return -1;
894 }
895
896 dprint(FD_NET, "server: connect from %s\n", inet_ntoa(addr.sin_addr));
897
898 pid = fork();
899 if (pid) {
900 close(sk);
901 fio_server_add_conn_pid(pid);
902 continue;
903 }
904
905 /* exits */
906 handle_connection(sk);
907 }
908
909 return exitval;
910}
911
912int fio_server_text_output(int level, const char *buf, size_t len)
913{
914 struct cmd_text_pdu *pdu;
915 unsigned int tlen;
916 struct timeval tv;
917
918 if (server_fd == -1)
919 return log_local_buf(buf, len);
920
921 tlen = sizeof(*pdu) + len;
922 pdu = malloc(tlen);
923
924 pdu->level = __cpu_to_le32(level);
925 pdu->buf_len = __cpu_to_le32(len);
926
927 gettimeofday(&tv, NULL);
928 pdu->log_sec = __cpu_to_le64(tv.tv_sec);
929 pdu->log_usec = __cpu_to_le64(tv.tv_usec);
930
931 memcpy(pdu->buf, buf, len);
932
933 fio_net_send_cmd(server_fd, FIO_NET_CMD_TEXT, pdu, tlen, NULL, NULL);
934 free(pdu);
935 return len;
936}
937
938static void convert_io_stat(struct io_stat *dst, struct io_stat *src)
939{
940 dst->max_val = cpu_to_le64(src->max_val);
941 dst->min_val = cpu_to_le64(src->min_val);
942 dst->samples = cpu_to_le64(src->samples);
943
944 /*
945 * Encode to IEEE 754 for network transfer
946 */
947 dst->mean.u.i = __cpu_to_le64(fio_double_to_uint64(src->mean.u.f));
948 dst->S.u.i = __cpu_to_le64(fio_double_to_uint64(src->S.u.f));
949}
950
951static void convert_gs(struct group_run_stats *dst, struct group_run_stats *src)
952{
953 int i;
954
955 for (i = 0; i < DDIR_RWDIR_CNT; i++) {
956 dst->max_run[i] = cpu_to_le64(src->max_run[i]);
957 dst->min_run[i] = cpu_to_le64(src->min_run[i]);
958 dst->max_bw[i] = cpu_to_le64(src->max_bw[i]);
959 dst->min_bw[i] = cpu_to_le64(src->min_bw[i]);
960 dst->io_kb[i] = cpu_to_le64(src->io_kb[i]);
961 dst->agg[i] = cpu_to_le64(src->agg[i]);
962 }
963
964 dst->kb_base = cpu_to_le32(src->kb_base);
965 dst->unit_base = cpu_to_le32(src->unit_base);
966 dst->groupid = cpu_to_le32(src->groupid);
967 dst->unified_rw_rep = cpu_to_le32(src->unified_rw_rep);
968}
969
970/*
971 * Send a CMD_TS, which packs struct thread_stat and group_run_stats
972 * into a single payload.
973 */
974void fio_server_send_ts(struct thread_stat *ts, struct group_run_stats *rs)
975{
976 struct cmd_ts_pdu p;
977 int i, j;
978
979 dprint(FD_NET, "server sending end stats\n");
980
981 memset(&p, 0, sizeof(p));
982
983 strcpy(p.ts.name, ts->name);
984 strcpy(p.ts.verror, ts->verror);
985 strcpy(p.ts.description, ts->description);
986
987 p.ts.error = cpu_to_le32(ts->error);
988 p.ts.thread_number = cpu_to_le32(ts->thread_number);
989 p.ts.groupid = cpu_to_le32(ts->groupid);
990 p.ts.pid = cpu_to_le32(ts->pid);
991 p.ts.members = cpu_to_le32(ts->members);
992 p.ts.unified_rw_rep = cpu_to_le32(ts->unified_rw_rep);
993
994 for (i = 0; i < DDIR_RWDIR_CNT; i++) {
995 convert_io_stat(&p.ts.clat_stat[i], &ts->clat_stat[i]);
996 convert_io_stat(&p.ts.slat_stat[i], &ts->slat_stat[i]);
997 convert_io_stat(&p.ts.lat_stat[i], &ts->lat_stat[i]);
998 convert_io_stat(&p.ts.bw_stat[i], &ts->bw_stat[i]);
999 }
1000
1001 p.ts.usr_time = cpu_to_le64(ts->usr_time);
1002 p.ts.sys_time = cpu_to_le64(ts->sys_time);
1003 p.ts.ctx = cpu_to_le64(ts->ctx);
1004 p.ts.minf = cpu_to_le64(ts->minf);
1005 p.ts.majf = cpu_to_le64(ts->majf);
1006 p.ts.clat_percentiles = cpu_to_le64(ts->clat_percentiles);
1007
1008 for (i = 0; i < FIO_IO_U_LIST_MAX_LEN; i++) {
1009 fio_fp64_t *src = &ts->percentile_list[i];
1010 fio_fp64_t *dst = &p.ts.percentile_list[i];
1011
1012 dst->u.i = __cpu_to_le64(fio_double_to_uint64(src->u.f));
1013 }
1014
1015 for (i = 0; i < FIO_IO_U_MAP_NR; i++) {
1016 p.ts.io_u_map[i] = cpu_to_le32(ts->io_u_map[i]);
1017 p.ts.io_u_submit[i] = cpu_to_le32(ts->io_u_submit[i]);
1018 p.ts.io_u_complete[i] = cpu_to_le32(ts->io_u_complete[i]);
1019 }
1020
1021 for (i = 0; i < FIO_IO_U_LAT_U_NR; i++) {
1022 p.ts.io_u_lat_u[i] = cpu_to_le32(ts->io_u_lat_u[i]);
1023 p.ts.io_u_lat_m[i] = cpu_to_le32(ts->io_u_lat_m[i]);
1024 }
1025
1026 for (i = 0; i < DDIR_RWDIR_CNT; i++)
1027 for (j = 0; j < FIO_IO_U_PLAT_NR; j++)
1028 p.ts.io_u_plat[i][j] = cpu_to_le32(ts->io_u_plat[i][j]);
1029
1030 for (i = 0; i < DDIR_RWDIR_CNT; i++) {
1031 p.ts.total_io_u[i] = cpu_to_le64(ts->total_io_u[i]);
1032 p.ts.short_io_u[i] = cpu_to_le64(ts->short_io_u[i]);
1033 }
1034
1035 p.ts.total_submit = cpu_to_le64(ts->total_submit);
1036 p.ts.total_complete = cpu_to_le64(ts->total_complete);
1037
1038 for (i = 0; i < DDIR_RWDIR_CNT; i++) {
1039 p.ts.io_bytes[i] = cpu_to_le64(ts->io_bytes[i]);
1040 p.ts.runtime[i] = cpu_to_le64(ts->runtime[i]);
1041 }
1042
1043 p.ts.total_run_time = cpu_to_le64(ts->total_run_time);
1044 p.ts.continue_on_error = cpu_to_le16(ts->continue_on_error);
1045 p.ts.total_err_count = cpu_to_le64(ts->total_err_count);
1046 p.ts.first_error = cpu_to_le32(ts->first_error);
1047 p.ts.kb_base = cpu_to_le32(ts->kb_base);
1048 p.ts.unit_base = cpu_to_le32(ts->unit_base);
1049
1050 convert_gs(&p.rs, rs);
1051
1052 fio_net_send_cmd(server_fd, FIO_NET_CMD_TS, &p, sizeof(p), NULL, NULL);
1053}
1054
1055void fio_server_send_gs(struct group_run_stats *rs)
1056{
1057 struct group_run_stats gs;
1058
1059 dprint(FD_NET, "server sending group run stats\n");
1060
1061 convert_gs(&gs, rs);
1062 fio_net_send_cmd(server_fd, FIO_NET_CMD_GS, &gs, sizeof(gs), NULL, NULL);
1063}
1064
1065static void convert_agg(struct disk_util_agg *dst, struct disk_util_agg *src)
1066{
1067 int i;
1068
1069 for (i = 0; i < 2; i++) {
1070 dst->ios[i] = cpu_to_le32(src->ios[i]);
1071 dst->merges[i] = cpu_to_le32(src->merges[i]);
1072 dst->sectors[i] = cpu_to_le64(src->sectors[i]);
1073 dst->ticks[i] = cpu_to_le32(src->ticks[i]);
1074 }
1075
1076 dst->io_ticks = cpu_to_le32(src->io_ticks);
1077 dst->time_in_queue = cpu_to_le32(src->time_in_queue);
1078 dst->slavecount = cpu_to_le32(src->slavecount);
1079 dst->max_util.u.i = __cpu_to_le64(fio_double_to_uint64(src->max_util.u.f));
1080}
1081
1082static void convert_dus(struct disk_util_stat *dst, struct disk_util_stat *src)
1083{
1084 int i;
1085
1086 strcpy((char *) dst->name, (char *) src->name);
1087
1088 for (i = 0; i < 2; i++) {
1089 dst->ios[i] = cpu_to_le32(src->ios[i]);
1090 dst->merges[i] = cpu_to_le32(src->merges[i]);
1091 dst->sectors[i] = cpu_to_le64(src->sectors[i]);
1092 dst->ticks[i] = cpu_to_le32(src->ticks[i]);
1093 }
1094
1095 dst->io_ticks = cpu_to_le32(src->io_ticks);
1096 dst->time_in_queue = cpu_to_le32(src->time_in_queue);
1097 dst->msec = cpu_to_le64(src->msec);
1098}
1099
1100void fio_server_send_du(void)
1101{
1102 struct disk_util *du;
1103 struct flist_head *entry;
1104 struct cmd_du_pdu pdu;
1105
1106 dprint(FD_NET, "server: sending disk_util %d\n", !flist_empty(&disk_list));
1107
1108 memset(&pdu, 0, sizeof(pdu));
1109
1110 flist_for_each(entry, &disk_list) {
1111 du = flist_entry(entry, struct disk_util, list);
1112
1113 convert_dus(&pdu.dus, &du->dus);
1114 convert_agg(&pdu.agg, &du->agg);
1115
1116 fio_net_send_cmd(server_fd, FIO_NET_CMD_DU, &pdu, sizeof(pdu), NULL, NULL);
1117 }
1118}
1119
1120/*
1121 * Send a command with a separate PDU, not inlined in the command
1122 */
1123static int fio_send_cmd_ext_pdu(int sk, uint16_t opcode, const void *buf,
1124 off_t size, uint64_t tag, uint32_t flags)
1125{
1126 struct fio_net_cmd cmd;
1127 struct iovec iov[2];
1128
1129 iov[0].iov_base = &cmd;
1130 iov[0].iov_len = sizeof(cmd);
1131 iov[1].iov_base = (void *) buf;
1132 iov[1].iov_len = size;
1133
1134 __fio_init_net_cmd(&cmd, opcode, size, tag);
1135 cmd.flags = __cpu_to_le32(flags);
1136 fio_net_cmd_crc_pdu(&cmd, buf);
1137
1138 return fio_sendv_data(sk, iov, 2);
1139}
1140
1141static int fio_send_iolog_gz(struct cmd_iolog_pdu *pdu, struct io_log *log)
1142{
1143 int ret = 0;
1144#ifdef CONFIG_ZLIB
1145 z_stream stream;
1146 void *out_pdu;
1147
1148 /*
1149 * Dirty - since the log is potentially huge, compress it into
1150 * FIO_SERVER_MAX_FRAGMENT_PDU chunks and let the receiving
1151 * side defragment it.
1152 */
1153 out_pdu = malloc(FIO_SERVER_MAX_FRAGMENT_PDU);
1154
1155 stream.zalloc = Z_NULL;
1156 stream.zfree = Z_NULL;
1157 stream.opaque = Z_NULL;
1158
1159 if (deflateInit(&stream, Z_DEFAULT_COMPRESSION) != Z_OK) {
1160 ret = 1;
1161 goto err;
1162 }
1163
1164 stream.next_in = (void *) log->log;
1165 stream.avail_in = log->nr_samples * sizeof(struct io_sample);
1166
1167 do {
1168 unsigned int this_len, flags = 0;
1169 int ret;
1170
1171 stream.avail_out = FIO_SERVER_MAX_FRAGMENT_PDU;
1172 stream.next_out = out_pdu;
1173 ret = deflate(&stream, Z_FINISH);
1174 /* may be Z_OK, or Z_STREAM_END */
1175 if (ret < 0)
1176 goto err_zlib;
1177
1178 this_len = FIO_SERVER_MAX_FRAGMENT_PDU - stream.avail_out;
1179
1180 if (stream.avail_in)
1181 flags = FIO_NET_CMD_F_MORE;
1182
1183 ret = fio_send_cmd_ext_pdu(server_fd, FIO_NET_CMD_IOLOG,
1184 out_pdu, this_len, 0, flags);
1185 if (ret)
1186 goto err_zlib;
1187 } while (stream.avail_in);
1188
1189err_zlib:
1190 deflateEnd(&stream);
1191err:
1192 free(out_pdu);
1193#endif
1194 return ret;
1195}
1196
1197int fio_send_iolog(struct thread_data *td, struct io_log *log, const char *name)
1198{
1199 struct cmd_iolog_pdu pdu;
1200 int i, ret = 0;
1201
1202 pdu.thread_number = cpu_to_le32(td->thread_number);
1203 pdu.nr_samples = __cpu_to_le32(log->nr_samples);
1204 pdu.log_type = cpu_to_le32(log->log_type);
1205 pdu.compressed = cpu_to_le32(use_zlib);
1206 strcpy((char *) pdu.name, name);
1207
1208 for (i = 0; i < log->nr_samples; i++) {
1209 struct io_sample *s = &log->log[i];
1210
1211 s->time = cpu_to_le64(s->time);
1212 s->val = cpu_to_le64(s->val);
1213 s->ddir = cpu_to_le32(s->ddir);
1214 s->bs = cpu_to_le32(s->bs);
1215 }
1216
1217 /*
1218 * Send header first, it's not compressed.
1219 */
1220 ret = fio_send_cmd_ext_pdu(server_fd, FIO_NET_CMD_IOLOG, &pdu,
1221 sizeof(pdu), 0, FIO_NET_CMD_F_MORE);
1222 if (ret)
1223 return ret;
1224
1225 /*
1226 * Now send actual log, compress if we can, otherwise just plain
1227 */
1228 if (use_zlib)
1229 return fio_send_iolog_gz(&pdu, log);
1230
1231 return fio_send_cmd_ext_pdu(server_fd, FIO_NET_CMD_IOLOG, log->log,
1232 log->nr_samples * sizeof(struct io_sample), 0, 0);
1233}
1234
1235void fio_server_send_add_job(struct thread_data *td)
1236{
1237 struct cmd_add_job_pdu pdu;
1238
1239 memset(&pdu, 0, sizeof(pdu));
1240 pdu.thread_number = cpu_to_le32(td->thread_number);
1241 pdu.groupid = cpu_to_le32(td->groupid);
1242 convert_thread_options_to_net(&pdu.top, &td->o);
1243
1244 fio_net_send_cmd(server_fd, FIO_NET_CMD_ADD_JOB, &pdu, sizeof(pdu), NULL, NULL);
1245}
1246
1247void fio_server_send_start(struct thread_data *td)
1248{
1249 assert(server_fd != -1);
1250
1251 fio_net_send_simple_cmd(server_fd, FIO_NET_CMD_SERVER_START, 0, NULL);
1252}
1253
1254static int fio_init_server_ip(void)
1255{
1256 struct sockaddr *addr;
1257 socklen_t socklen;
1258 int sk, opt;
1259
1260 if (use_ipv6)
1261 sk = socket(AF_INET6, SOCK_STREAM, 0);
1262 else
1263 sk = socket(AF_INET, SOCK_STREAM, 0);
1264
1265 if (sk < 0) {
1266 log_err("fio: socket: %s\n", strerror(errno));
1267 return -1;
1268 }
1269
1270 opt = 1;
1271 if (setsockopt(sk, SOL_SOCKET, SO_REUSEADDR, (void *)&opt, sizeof(opt)) < 0) {
1272 log_err("fio: setsockopt: %s\n", strerror(errno));
1273 close(sk);
1274 return -1;
1275 }
1276#ifdef SO_REUSEPORT
1277 if (setsockopt(sk, SOL_SOCKET, SO_REUSEPORT, &opt, sizeof(opt)) < 0) {
1278 log_err("fio: setsockopt: %s\n", strerror(errno));
1279 close(sk);
1280 return -1;
1281 }
1282#endif
1283
1284 if (use_ipv6) {
1285 addr = (struct sockaddr *) &saddr_in6;
1286 socklen = sizeof(saddr_in6);
1287 saddr_in6.sin6_family = AF_INET6;
1288 } else {
1289 addr = (struct sockaddr *) &saddr_in;
1290 socklen = sizeof(saddr_in);
1291 saddr_in.sin_family = AF_INET;
1292 }
1293
1294 if (bind(sk, addr, socklen) < 0) {
1295 log_err("fio: bind: %s\n", strerror(errno));
1296 close(sk);
1297 return -1;
1298 }
1299
1300 return sk;
1301}
1302
1303static int fio_init_server_sock(void)
1304{
1305 struct sockaddr_un addr;
1306 socklen_t len;
1307 mode_t mode;
1308 int sk;
1309
1310 sk = socket(AF_UNIX, SOCK_STREAM, 0);
1311 if (sk < 0) {
1312 log_err("fio: socket: %s\n", strerror(errno));
1313 return -1;
1314 }
1315
1316 mode = umask(000);
1317
1318 memset(&addr, 0, sizeof(addr));
1319 addr.sun_family = AF_UNIX;
1320 strcpy(addr.sun_path, bind_sock);
1321 unlink(bind_sock);
1322
1323 len = sizeof(addr.sun_family) + strlen(bind_sock) + 1;
1324
1325 if (bind(sk, (struct sockaddr *) &addr, len) < 0) {
1326 log_err("fio: bind: %s\n", strerror(errno));
1327 close(sk);
1328 return -1;
1329 }
1330
1331 umask(mode);
1332 return sk;
1333}
1334
1335static int fio_init_server_connection(void)
1336{
1337 char bind_str[128];
1338 int sk;
1339
1340 dprint(FD_NET, "starting server\n");
1341
1342 if (!bind_sock)
1343 sk = fio_init_server_ip();
1344 else
1345 sk = fio_init_server_sock();
1346
1347 if (sk < 0)
1348 return sk;
1349
1350 if (!bind_sock) {
1351 char *p, port[16];
1352 const void *src;
1353 int af;
1354
1355 if (use_ipv6) {
1356 af = AF_INET6;
1357 src = &saddr_in6.sin6_addr;
1358 } else {
1359 af = AF_INET;
1360 src = &saddr_in.sin_addr;
1361 }
1362
1363 p = (char *) inet_ntop(af, src, bind_str, sizeof(bind_str));
1364
1365 sprintf(port, ",%u", fio_net_port);
1366 if (p)
1367 strcat(p, port);
1368 else
1369 strcpy(bind_str, port);
1370 } else
1371 strcpy(bind_str, bind_sock);
1372
1373 log_info("fio: server listening on %s\n", bind_str);
1374
1375 if (listen(sk, 0) < 0) {
1376 log_err("fio: listen: %s\n", strerror(errno));
1377 return -1;
1378 }
1379
1380 return sk;
1381}
1382
1383int fio_server_parse_host(const char *host, int *ipv6, struct in_addr *inp,
1384 struct in6_addr *inp6)
1385
1386{
1387 int ret = 0;
1388
1389 if (*ipv6)
1390 ret = inet_pton(AF_INET6, host, inp6);
1391 else
1392 ret = inet_pton(AF_INET, host, inp);
1393
1394 if (ret != 1) {
1395 struct hostent *hent;
1396
1397 hent = gethostbyname(host);
1398 if (!hent) {
1399 log_err("fio: failed to resolve <%s>\n", host);
1400 return 0;
1401 }
1402
1403 if (*ipv6) {
1404 if (hent->h_addrtype != AF_INET6) {
1405 log_info("fio: falling back to IPv4\n");
1406 *ipv6 = 0;
1407 } else
1408 memcpy(inp6, hent->h_addr_list[0], 16);
1409 }
1410 if (!*ipv6) {
1411 if (hent->h_addrtype != AF_INET) {
1412 log_err("fio: lookup type mismatch\n");
1413 return 0;
1414 }
1415 memcpy(inp, hent->h_addr_list[0], 4);
1416 }
1417 ret = 1;
1418 }
1419
1420 return !(ret == 1);
1421}
1422
1423/*
1424 * Parse a host/ip/port string. Reads from 'str'.
1425 *
1426 * Outputs:
1427 *
1428 * For IPv4:
1429 * *ptr is the host, *port is the port, inp is the destination.
1430 * For IPv6:
1431 * *ptr is the host, *port is the port, inp6 is the dest, and *ipv6 is 1.
1432 * For local domain sockets:
1433 * *ptr is the filename, *is_sock is 1.
1434 */
1435int fio_server_parse_string(const char *str, char **ptr, int *is_sock,
1436 int *port, struct in_addr *inp,
1437 struct in6_addr *inp6, int *ipv6)
1438{
1439 const char *host = str;
1440 char *portp;
1441 int lport = 0;
1442
1443 *ptr = NULL;
1444 *is_sock = 0;
1445 *port = fio_net_port;
1446 *ipv6 = 0;
1447
1448 if (!strncmp(str, "sock:", 5)) {
1449 *ptr = strdup(str + 5);
1450 *is_sock = 1;
1451
1452 return 0;
1453 }
1454
1455 /*
1456 * Is it ip:<ip or host>:port
1457 */
1458 if (!strncmp(host, "ip:", 3))
1459 host += 3;
1460 else if (!strncmp(host, "ip4:", 4))
1461 host += 4;
1462 else if (!strncmp(host, "ip6:", 4)) {
1463 host += 4;
1464 *ipv6 = 1;
1465 } else if (host[0] == ':') {
1466 /* String is :port */
1467 host++;
1468 lport = atoi(host);
1469 if (!lport || lport > 65535) {
1470 log_err("fio: bad server port %u\n", lport);
1471 return 1;
1472 }
1473 /* no hostname given, we are done */
1474 *port = lport;
1475 return 0;
1476 }
1477
1478 /*
1479 * If no port seen yet, check if there's a last ':' at the end
1480 */
1481 if (!lport) {
1482 portp = strchr(host, ',');
1483 if (portp) {
1484 *portp = '\0';
1485 portp++;
1486 lport = atoi(portp);
1487 if (!lport || lport > 65535) {
1488 log_err("fio: bad server port %u\n", lport);
1489 return 1;
1490 }
1491 }
1492 }
1493
1494 if (lport)
1495 *port = lport;
1496
1497 if (!strlen(host))
1498 return 0;
1499
1500 *ptr = strdup(host);
1501
1502 if (fio_server_parse_host(*ptr, ipv6, inp, inp6)) {
1503 free(*ptr);
1504 *ptr = NULL;
1505 return 1;
1506 }
1507
1508 if (*port == 0)
1509 *port = fio_net_port;
1510
1511 return 0;
1512}
1513
1514/*
1515 * Server arg should be one of:
1516 *
1517 * sock:/path/to/socket
1518 * ip:1.2.3.4
1519 * 1.2.3.4
1520 *
1521 * Where sock uses unix domain sockets, and ip binds the server to
1522 * a specific interface. If no arguments are given to the server, it
1523 * uses IP and binds to 0.0.0.0.
1524 *
1525 */
1526static int fio_handle_server_arg(void)
1527{
1528 int port = fio_net_port;
1529 int is_sock, ret = 0;
1530
1531 saddr_in.sin_addr.s_addr = htonl(INADDR_ANY);
1532
1533 if (!fio_server_arg)
1534 goto out;
1535
1536 ret = fio_server_parse_string(fio_server_arg, &bind_sock, &is_sock,
1537 &port, &saddr_in.sin_addr,
1538 &saddr_in6.sin6_addr, &use_ipv6);
1539
1540 if (!is_sock && bind_sock) {
1541 free(bind_sock);
1542 bind_sock = NULL;
1543 }
1544
1545out:
1546 fio_net_port = port;
1547 saddr_in.sin_port = htons(port);
1548 saddr_in6.sin6_port = htons(port);
1549 return ret;
1550}
1551
1552static int fio_server(void)
1553{
1554 int sk, ret;
1555
1556 dprint(FD_NET, "starting server\n");
1557
1558 if (fio_handle_server_arg())
1559 return -1;
1560
1561 sk = fio_init_server_connection();
1562 if (sk < 0)
1563 return -1;
1564
1565 ret = accept_loop(sk);
1566
1567 close(sk);
1568
1569 if (fio_server_arg) {
1570 free(fio_server_arg);
1571 fio_server_arg = NULL;
1572 }
1573 if (bind_sock)
1574 free(bind_sock);
1575
1576 return ret;
1577}
1578
1579void fio_server_got_signal(int signal)
1580{
1581 if (signal == SIGPIPE)
1582 server_fd = -1;
1583 else {
1584 log_info("\nfio: terminating on signal %d\n", signal);
1585 exit_backend = 1;
1586 }
1587}
1588
1589static int check_existing_pidfile(const char *pidfile)
1590{
1591 struct stat sb;
1592 char buf[16];
1593 pid_t pid;
1594 FILE *f;
1595
1596 if (stat(pidfile, &sb))
1597 return 0;
1598
1599 f = fopen(pidfile, "r");
1600 if (!f)
1601 return 0;
1602
1603 if (fread(buf, sb.st_size, 1, f) <= 0) {
1604 fclose(f);
1605 return 1;
1606 }
1607 fclose(f);
1608
1609 pid = atoi(buf);
1610 if (kill(pid, SIGCONT) < 0)
1611 return errno != ESRCH;
1612
1613 return 1;
1614}
1615
1616static int write_pid(pid_t pid, const char *pidfile)
1617{
1618 FILE *fpid;
1619
1620 fpid = fopen(pidfile, "w");
1621 if (!fpid) {
1622 log_err("fio: failed opening pid file %s\n", pidfile);
1623 return 1;
1624 }
1625
1626 fprintf(fpid, "%u\n", (unsigned int) pid);
1627 fclose(fpid);
1628 return 0;
1629}
1630
1631/*
1632 * If pidfile is specified, background us.
1633 */
1634int fio_start_server(char *pidfile)
1635{
1636 pid_t pid;
1637 int ret;
1638
1639#if defined(WIN32)
1640 WSADATA wsd;
1641 WSAStartup(MAKEWORD(2, 2), &wsd);
1642#endif
1643
1644 if (!pidfile)
1645 return fio_server();
1646
1647 if (check_existing_pidfile(pidfile)) {
1648 log_err("fio: pidfile %s exists and server appears alive\n",
1649 pidfile);
1650 return -1;
1651 }
1652
1653 pid = fork();
1654 if (pid < 0) {
1655 log_err("fio: failed server fork: %s", strerror(errno));
1656 free(pidfile);
1657 return -1;
1658 } else if (pid) {
1659 int ret = write_pid(pid, pidfile);
1660
1661 exit(ret);
1662 }
1663
1664 setsid();
1665 openlog("fio", LOG_NDELAY|LOG_NOWAIT|LOG_PID, LOG_USER);
1666 log_syslog = 1;
1667 close(STDIN_FILENO);
1668 close(STDOUT_FILENO);
1669 close(STDERR_FILENO);
1670 f_out = NULL;
1671 f_err = NULL;
1672
1673 ret = fio_server();
1674
1675 closelog();
1676 unlink(pidfile);
1677 free(pidfile);
1678 return ret;
1679}
1680
1681void fio_server_set_arg(const char *arg)
1682{
1683 fio_server_arg = strdup(arg);
1684}
fio - Flexible IO Tester