projects / fio.git / blame_incremental
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (non-incremental) | history | HEAD
backend: better NULL termination fix for IO scheduler switching
[fio.git] / server.c
... / ...
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 <sys/poll.h>
8#include <sys/types.h>
9#include <sys/wait.h>
10#include <sys/socket.h>
11#include <sys/stat.h>
12#include <sys/un.h>
13#include <sys/uio.h>
14#include <netinet/in.h>
15#include <arpa/inet.h>
16#include <netdb.h>
17#include <syslog.h>
18#include <signal.h>
19#ifdef CONFIG_ZLIB
20#include <zlib.h>
21#endif
22
23#include "fio.h"
24#include "server.h"
25#include "crc/crc16.h"
26#include "lib/ieee754.h"
27
28int fio_net_port = FIO_NET_PORT;
29
30int exit_backend = 0;
31
32static int server_fd = -1;
33static char *fio_server_arg;
34static char *bind_sock;
35static struct sockaddr_in saddr_in;
36static struct sockaddr_in6 saddr_in6;
37static int use_ipv6;
38#ifdef CONFIG_ZLIB
39static unsigned int has_zlib = 1;
40#else
41static unsigned int has_zlib = 0;
42#endif
43static unsigned int use_zlib;
44
45struct fio_fork_item {
46 struct flist_head list;
47 int exitval;
48 int signal;
49 int exited;
50 pid_t pid;
51};
52
53static const char *fio_server_ops[FIO_NET_CMD_NR] = {
54 "",
55 "QUIT",
56 "EXIT",
57 "JOB",
58 "JOBLINE",
59 "TEXT",
60 "TS",
61 "GS",
62 "SEND_ETA",
63 "ETA",
64 "PROBE",
65 "START",
66 "STOP",
67 "DISK_UTIL",
68 "SERVER_START",
69 "ADD_JOB",
70 "CMD_RUN",
71 "CMD_IOLOG",
72};
73
74const char *fio_server_op(unsigned int op)
75{
76 static char buf[32];
77
78 if (op < FIO_NET_CMD_NR)
79 return fio_server_ops[op];
80
81 sprintf(buf, "UNKNOWN/%d", op);
82 return buf;
83}
84
85static ssize_t iov_total_len(const struct iovec *iov, int count)
86{
87 ssize_t ret = 0;
88
89 while (count--) {
90 ret += iov->iov_len;
91 iov++;
92 }
93
94 return ret;
95}
96
97static int fio_sendv_data(int sk, struct iovec *iov, int count)
98{
99 ssize_t total_len = iov_total_len(iov, count);
100 ssize_t ret;
101
102 do {
103 ret = writev(sk, iov, count);
104 if (ret > 0) {
105 total_len -= ret;
106 if (!total_len)
107 break;
108
109 while (ret) {
110 if (ret >= iov->iov_len) {
111 ret -= iov->iov_len;
112 iov++;
113 continue;
114 }
115 iov->iov_base += ret;
116 iov->iov_len -= ret;
117 ret = 0;
118 }
119 } else if (!ret)
120 break;
121 else if (errno == EAGAIN || errno == EINTR)
122 continue;
123 else
124 break;
125 } while (!exit_backend);
126
127 if (!total_len)
128 return 0;
129
130 if (errno)
131 return -errno;
132
133 return 1;
134}
135
136int fio_send_data(int sk, const void *p, unsigned int len)
137{
138 struct iovec iov = { .iov_base = (void *) p, .iov_len = len };
139
140 assert(len <= sizeof(struct fio_net_cmd) + FIO_SERVER_MAX_FRAGMENT_PDU);
141
142 return fio_sendv_data(sk, &iov, 1);
143}
144
145int fio_recv_data(int sk, void *p, unsigned int len)
146{
147 do {
148 int ret = recv(sk, p, len, MSG_WAITALL);
149
150 if (ret > 0) {
151 len -= ret;
152 if (!len)
153 break;
154 p += ret;
155 continue;
156 } else if (!ret)
157 break;
158 else if (errno == EAGAIN || errno == EINTR)
159 continue;
160 else
161 break;
162 } while (!exit_backend);
163
164 if (!len)
165 return 0;
166
167 return -1;
168}
169
170static int verify_convert_cmd(struct fio_net_cmd *cmd)
171{
172 uint16_t crc;
173
174 cmd->cmd_crc16 = le16_to_cpu(cmd->cmd_crc16);
175 cmd->pdu_crc16 = le16_to_cpu(cmd->pdu_crc16);
176
177 crc = fio_crc16(cmd, FIO_NET_CMD_CRC_SZ);
178 if (crc != cmd->cmd_crc16) {
179 log_err("fio: server bad crc on command (got %x, wanted %x)\n",
180 cmd->cmd_crc16, crc);
181 return 1;
182 }
183
184 cmd->version = le16_to_cpu(cmd->version);
185 cmd->opcode = le16_to_cpu(cmd->opcode);
186 cmd->flags = le32_to_cpu(cmd->flags);
187 cmd->tag = le64_to_cpu(cmd->tag);
188 cmd->pdu_len = le32_to_cpu(cmd->pdu_len);
189
190 switch (cmd->version) {
191 case FIO_SERVER_VER:
192 break;
193 default:
194 log_err("fio: bad server cmd version %d\n", cmd->version);
195 return 1;
196 }
197
198 if (cmd->pdu_len > FIO_SERVER_MAX_FRAGMENT_PDU) {
199 log_err("fio: command payload too large: %u\n", cmd->pdu_len);
200 return 1;
201 }
202
203 return 0;
204}
205
206/*
207 * Read (and defragment, if necessary) incoming commands
208 */
209struct fio_net_cmd *fio_net_recv_cmd(int sk)
210{
211 struct fio_net_cmd cmd, *cmdret = NULL;
212 size_t cmd_size = 0, pdu_offset = 0;
213 uint16_t crc;
214 int ret, first = 1;
215 void *pdu = NULL;
216
217 do {
218 ret = fio_recv_data(sk, &cmd, sizeof(cmd));
219 if (ret)
220 break;
221
222 /* We have a command, verify it and swap if need be */
223 ret = verify_convert_cmd(&cmd);
224 if (ret)
225 break;
226
227 if (first) {
228 /* if this is text, add room for \0 at the end */
229 cmd_size = sizeof(cmd) + cmd.pdu_len + 1;
230 assert(!cmdret);
231 } else
232 cmd_size += cmd.pdu_len;
233
234 cmdret = realloc(cmdret, cmd_size);
235
236 if (first)
237 memcpy(cmdret, &cmd, sizeof(cmd));
238 else if (cmdret->opcode != cmd.opcode) {
239 log_err("fio: fragment opcode mismatch (%d != %d)\n",
240 cmdret->opcode, cmd.opcode);
241 ret = 1;
242 break;
243 }
244
245 if (!cmd.pdu_len)
246 break;
247
248 /* There's payload, get it */
249 pdu = (void *) cmdret->payload + pdu_offset;
250 ret = fio_recv_data(sk, pdu, cmd.pdu_len);
251 if (ret)
252 break;
253
254 /* Verify payload crc */
255 crc = fio_crc16(pdu, cmd.pdu_len);
256 if (crc != cmd.pdu_crc16) {
257 log_err("fio: server bad crc on payload ");
258 log_err("(got %x, wanted %x)\n", cmd.pdu_crc16, crc);
259 ret = 1;
260 break;
261 }
262
263 pdu_offset += cmd.pdu_len;
264 if (!first)
265 cmdret->pdu_len += cmd.pdu_len;
266 first = 0;
267 } while (cmd.flags & FIO_NET_CMD_F_MORE);
268
269 if (ret) {
270 free(cmdret);
271 cmdret = NULL;
272 } else if (cmdret) {
273 /* zero-terminate text input */
274 if (cmdret->pdu_len) {
275 if (cmdret->opcode == FIO_NET_CMD_TEXT) {
276 struct cmd_text_pdu *pdu = (struct cmd_text_pdu *) cmdret->payload;
277 char *buf = (char *) pdu->buf;
278
279 buf[pdu->buf_len] = '\0';
280 } else if (cmdret->opcode == FIO_NET_CMD_JOB) {
281 struct cmd_job_pdu *pdu = (struct cmd_job_pdu *) cmdret->payload;
282 char *buf = (char *) pdu->buf;
283 int len = le32_to_cpu(pdu->buf_len);
284
285 buf[len] = '\0';
286 }
287 }
288
289 /* frag flag is internal */
290 cmdret->flags &= ~FIO_NET_CMD_F_MORE;
291 }
292
293 return cmdret;
294}
295
296static void add_reply(uint64_t tag, struct flist_head *list)
297{
298 struct fio_net_cmd_reply *reply;
299
300 reply = (struct fio_net_cmd_reply *) (uintptr_t) tag;
301 flist_add_tail(&reply->list, list);
302}
303
304static uint64_t alloc_reply(uint64_t tag, uint16_t opcode)
305{
306 struct fio_net_cmd_reply *reply;
307
308 reply = calloc(1, sizeof(*reply));
309 INIT_FLIST_HEAD(&reply->list);
310 gettimeofday(&reply->tv, NULL);
311 reply->saved_tag = tag;
312 reply->opcode = opcode;
313
314 return (uintptr_t) reply;
315}
316
317static void free_reply(uint64_t tag)
318{
319 struct fio_net_cmd_reply *reply;
320
321 reply = (struct fio_net_cmd_reply *) (uintptr_t) tag;
322 free(reply);
323}
324
325void fio_net_cmd_crc_pdu(struct fio_net_cmd *cmd, const void *pdu)
326{
327 uint32_t pdu_len;
328
329 cmd->cmd_crc16 = __cpu_to_le16(fio_crc16(cmd, FIO_NET_CMD_CRC_SZ));
330
331 pdu_len = le32_to_cpu(cmd->pdu_len);
332 cmd->pdu_crc16 = __cpu_to_le16(fio_crc16(pdu, pdu_len));
333}
334
335void fio_net_cmd_crc(struct fio_net_cmd *cmd)
336{
337 fio_net_cmd_crc_pdu(cmd, cmd->payload);
338}
339
340int fio_net_send_cmd(int fd, uint16_t opcode, const void *buf, off_t size,
341 uint64_t *tagptr, struct flist_head *list)
342{
343 struct fio_net_cmd *cmd = NULL;
344 size_t this_len, cur_len = 0;
345 uint64_t tag;
346 int ret;
347
348 if (list) {
349 assert(tagptr);
350 tag = *tagptr = alloc_reply(*tagptr, opcode);
351 } else
352 tag = tagptr ? *tagptr : 0;
353
354 do {
355 this_len = size;
356 if (this_len > FIO_SERVER_MAX_FRAGMENT_PDU)
357 this_len = FIO_SERVER_MAX_FRAGMENT_PDU;
358
359 if (!cmd || cur_len < sizeof(*cmd) + this_len) {
360 if (cmd)
361 free(cmd);
362
363 cur_len = sizeof(*cmd) + this_len;
364 cmd = malloc(cur_len);
365 }
366
367 fio_init_net_cmd(cmd, opcode, buf, this_len, tag);
368
369 if (this_len < size)
370 cmd->flags = __cpu_to_le32(FIO_NET_CMD_F_MORE);
371
372 fio_net_cmd_crc(cmd);
373
374 ret = fio_send_data(fd, cmd, sizeof(*cmd) + this_len);
375 size -= this_len;
376 buf += this_len;
377 } while (!ret && size);
378
379 if (list) {
380 if (ret)
381 free_reply(tag);
382 else
383 add_reply(tag, list);
384 }
385
386 if (cmd)
387 free(cmd);
388
389 return ret;
390}
391
392static int fio_net_send_simple_stack_cmd(int sk, uint16_t opcode, uint64_t tag)
393{
394 struct fio_net_cmd cmd;
395
396 fio_init_net_cmd(&cmd, opcode, NULL, 0, tag);
397 fio_net_cmd_crc(&cmd);
398
399 return fio_send_data(sk, &cmd, sizeof(cmd));
400}
401
402/*
403 * If 'list' is non-NULL, then allocate and store the sent command for
404 * later verification.
405 */
406int fio_net_send_simple_cmd(int sk, uint16_t opcode, uint64_t tag,
407 struct flist_head *list)
408{
409 int ret;
410
411 if (list)
412 tag = alloc_reply(tag, opcode);
413
414 ret = fio_net_send_simple_stack_cmd(sk, opcode, tag);
415 if (ret) {
416 if (list)
417 free_reply(tag);
418
419 return ret;
420 }
421
422 if (list)
423 add_reply(tag, list);
424
425 return 0;
426}
427
428int fio_net_send_quit(int sk)
429{
430 dprint(FD_NET, "server: sending quit\n");
431
432 return fio_net_send_simple_cmd(sk, FIO_NET_CMD_QUIT, 0, NULL);
433}
434
435static int fio_net_send_ack(int sk, struct fio_net_cmd *cmd, int error,
436 int signal)
437{
438 struct cmd_end_pdu epdu;
439 uint64_t tag = 0;
440
441 if (cmd)
442 tag = cmd->tag;
443
444 epdu.error = __cpu_to_le32(error);
445 epdu.signal = __cpu_to_le32(signal);
446 return fio_net_send_cmd(sk, FIO_NET_CMD_STOP, &epdu, sizeof(epdu), &tag, NULL);
447}
448
449int fio_net_send_stop(int sk, int error, int signal)
450{
451 dprint(FD_NET, "server: sending stop (%d, %d)\n", error, signal);
452 return fio_net_send_ack(sk, NULL, error, signal);
453}
454
455static void fio_server_add_fork_item(pid_t pid, struct flist_head *list)
456{
457 struct fio_fork_item *ffi;
458
459 ffi = malloc(sizeof(*ffi));
460 ffi->exitval = 0;
461 ffi->signal = 0;
462 ffi->exited = 0;
463 ffi->pid = pid;
464 flist_add_tail(&ffi->list, list);
465}
466
467static void fio_server_add_conn_pid(struct flist_head *conn_list, pid_t pid)
468{
469 dprint(FD_NET, "server: forked off connection job (pid=%u)\n", (int) pid);
470 fio_server_add_fork_item(pid, conn_list);
471}
472
473static void fio_server_add_job_pid(struct flist_head *job_list, pid_t pid)
474{
475 dprint(FD_NET, "server: forked off job job (pid=%u)\n", (int) pid);
476 fio_server_add_fork_item(pid, job_list);
477}
478
479static void fio_server_check_fork_item(struct fio_fork_item *ffi)
480{
481 int ret, status;
482
483 ret = waitpid(ffi->pid, &status, WNOHANG);
484 if (ret < 0) {
485 if (errno == ECHILD) {
486 log_err("fio: connection pid %u disappeared\n", (int) ffi->pid);
487 ffi->exited = 1;
488 } else
489 log_err("fio: waitpid: %s\n", strerror(errno));
490 } else if (ret == ffi->pid) {
491 if (WIFSIGNALED(status)) {
492 ffi->signal = WTERMSIG(status);
493 ffi->exited = 1;
494 }
495 if (WIFEXITED(status)) {
496 if (WEXITSTATUS(status))
497 ffi->exitval = WEXITSTATUS(status);
498 ffi->exited = 1;
499 }
500 }
501}
502
503static void fio_server_fork_item_done(struct fio_fork_item *ffi)
504{
505 dprint(FD_NET, "pid %u exited, sig=%u, exitval=%d\n", (int) ffi->pid, ffi->signal, ffi->exitval);
506
507 /*
508 * Fold STOP and QUIT...
509 */
510 fio_net_send_stop(server_fd, ffi->exitval, ffi->signal);
511 fio_net_send_quit(server_fd);
512 flist_del(&ffi->list);
513 free(ffi);
514}
515
516static void fio_server_check_fork_items(struct flist_head *list)
517{
518 struct flist_head *entry, *tmp;
519 struct fio_fork_item *ffi;
520
521 flist_for_each_safe(entry, tmp, list) {
522 ffi = flist_entry(entry, struct fio_fork_item, list);
523
524 fio_server_check_fork_item(ffi);
525
526 if (ffi->exited)
527 fio_server_fork_item_done(ffi);
528 }
529}
530
531static void fio_server_check_jobs(struct flist_head *job_list)
532{
533 fio_server_check_fork_items(job_list);
534}
535
536static void fio_server_check_conns(struct flist_head *conn_list)
537{
538 fio_server_check_fork_items(conn_list);
539}
540
541static int handle_run_cmd(struct flist_head *job_list, struct fio_net_cmd *cmd)
542{
543 pid_t pid;
544 int ret;
545
546 set_genesis_time();
547
548 pid = fork();
549 if (pid) {
550 fio_server_add_job_pid(job_list, pid);
551 return 0;
552 }
553
554 ret = fio_backend();
555 free_threads_shm();
556 _exit(ret);
557}
558
559static int handle_job_cmd(struct fio_net_cmd *cmd)
560{
561 struct cmd_job_pdu *pdu = (struct cmd_job_pdu *) cmd->payload;
562 void *buf = pdu->buf;
563 struct cmd_start_pdu spdu;
564
565 pdu->buf_len = le32_to_cpu(pdu->buf_len);
566 pdu->client_type = le32_to_cpu(pdu->client_type);
567
568 if (parse_jobs_ini(buf, 1, 0, pdu->client_type)) {
569 fio_net_send_quit(server_fd);
570 return -1;
571 }
572
573 spdu.jobs = cpu_to_le32(thread_number);
574 spdu.stat_outputs = cpu_to_le32(stat_number);
575 fio_net_send_cmd(server_fd, FIO_NET_CMD_START, &spdu, sizeof(spdu), NULL, NULL);
576 return 0;
577}
578
579static int handle_jobline_cmd(struct fio_net_cmd *cmd)
580{
581 void *pdu = cmd->payload;
582 struct cmd_single_line_pdu *cslp;
583 struct cmd_line_pdu *clp;
584 unsigned long offset;
585 struct cmd_start_pdu spdu;
586 char **argv;
587 int i;
588
589 clp = pdu;
590 clp->lines = le16_to_cpu(clp->lines);
591 clp->client_type = le16_to_cpu(clp->client_type);
592 argv = malloc(clp->lines * sizeof(char *));
593 offset = sizeof(*clp);
594
595 dprint(FD_NET, "server: %d command line args\n", clp->lines);
596
597 for (i = 0; i < clp->lines; i++) {
598 cslp = pdu + offset;
599 argv[i] = (char *) cslp->text;
600
601 offset += sizeof(*cslp) + le16_to_cpu(cslp->len);
602 dprint(FD_NET, "server: %d: %s\n", i, argv[i]);
603 }
604
605 if (parse_cmd_line(clp->lines, argv, clp->client_type)) {
606 fio_net_send_quit(server_fd);
607 free(argv);
608 return -1;
609 }
610
611 free(argv);
612
613 spdu.jobs = cpu_to_le32(thread_number);
614 spdu.stat_outputs = cpu_to_le32(stat_number);
615 fio_net_send_cmd(server_fd, FIO_NET_CMD_START, &spdu, sizeof(spdu), NULL, NULL);
616 return 0;
617}
618
619static int handle_probe_cmd(struct fio_net_cmd *cmd)
620{
621 struct cmd_client_probe_pdu *pdu = (struct cmd_client_probe_pdu *) cmd->payload;
622 struct cmd_probe_reply_pdu probe;
623 uint64_t tag = cmd->tag;
624
625 dprint(FD_NET, "server: sending probe reply\n");
626
627 memset(&probe, 0, sizeof(probe));
628 gethostname((char *) probe.hostname, sizeof(probe.hostname));
629#ifdef CONFIG_BIG_ENDIAN
630 probe.bigendian = 1;
631#endif
632 strncpy((char *) probe.fio_version, fio_version_string, sizeof(probe.fio_version));
633
634 probe.os = FIO_OS;
635 probe.arch = FIO_ARCH;
636 probe.bpp = sizeof(void *);
637 probe.cpus = __cpu_to_le32(cpus_online());
638
639 /*
640 * If the client supports compression and we do too, then enable it
641 */
642 if (has_zlib && le64_to_cpu(pdu->flags) & FIO_PROBE_FLAG_ZLIB) {
643 probe.flags = __cpu_to_le64(FIO_PROBE_FLAG_ZLIB);
644 use_zlib = 1;
645 } else {
646 probe.flags = 0;
647 use_zlib = 0;
648 }
649
650 return fio_net_send_cmd(server_fd, FIO_NET_CMD_PROBE, &probe, sizeof(probe), &tag, NULL);
651}
652
653static int handle_send_eta_cmd(struct fio_net_cmd *cmd)
654{
655 struct jobs_eta *je;
656 size_t size;
657 uint64_t tag = cmd->tag;
658 int i;
659
660 if (!thread_number)
661 return 0;
662
663 size = sizeof(*je) + thread_number * sizeof(char) + 1;
664 je = malloc(size);
665 memset(je, 0, size);
666
667 if (!calc_thread_status(je, 1)) {
668 free(je);
669 return 0;
670 }
671
672 dprint(FD_NET, "server sending status\n");
673
674 je->nr_running = cpu_to_le32(je->nr_running);
675 je->nr_ramp = cpu_to_le32(je->nr_ramp);
676 je->nr_pending = cpu_to_le32(je->nr_pending);
677 je->nr_setting_up = cpu_to_le32(je->nr_setting_up);
678 je->files_open = cpu_to_le32(je->files_open);
679
680 for (i = 0; i < DDIR_RWDIR_CNT; i++) {
681 je->m_rate[i] = cpu_to_le32(je->m_rate[i]);
682 je->t_rate[i] = cpu_to_le32(je->t_rate[i]);
683 je->m_iops[i] = cpu_to_le32(je->m_iops[i]);
684 je->t_iops[i] = cpu_to_le32(je->t_iops[i]);
685 je->rate[i] = cpu_to_le32(je->rate[i]);
686 je->iops[i] = cpu_to_le32(je->iops[i]);
687 }
688
689 je->elapsed_sec = cpu_to_le64(je->elapsed_sec);
690 je->eta_sec = cpu_to_le64(je->eta_sec);
691 je->nr_threads = cpu_to_le32(je->nr_threads);
692 je->is_pow2 = cpu_to_le32(je->is_pow2);
693 je->unit_base = cpu_to_le32(je->unit_base);
694
695 fio_net_send_cmd(server_fd, FIO_NET_CMD_ETA, je, size, &tag, NULL);
696 free(je);
697 return 0;
698}
699
700static int send_update_job_reply(int fd, uint64_t __tag, int error)
701{
702 uint64_t tag = __tag;
703 uint32_t pdu_error;
704
705 pdu_error = __cpu_to_le32(error);
706 return fio_net_send_cmd(fd, FIO_NET_CMD_UPDATE_JOB, &pdu_error, sizeof(pdu_error), &tag, NULL);
707}
708
709static int handle_update_job_cmd(struct fio_net_cmd *cmd)
710{
711 struct cmd_add_job_pdu *pdu = (struct cmd_add_job_pdu *) cmd->payload;
712 struct thread_data *td;
713 uint32_t tnumber;
714
715 tnumber = le32_to_cpu(pdu->thread_number);
716
717 dprint(FD_NET, "server: updating options for job %u\n", tnumber);
718
719 if (!tnumber || tnumber > thread_number) {
720 send_update_job_reply(server_fd, cmd->tag, ENODEV);
721 return 0;
722 }
723
724 td = &threads[tnumber - 1];
725 convert_thread_options_to_cpu(&td->o, &pdu->top);
726 send_update_job_reply(server_fd, cmd->tag, 0);
727 return 0;
728}
729
730static int handle_command(struct flist_head *job_list, struct fio_net_cmd *cmd)
731{
732 int ret;
733
734 dprint(FD_NET, "server: got op [%s], pdu=%u, tag=%llx\n",
735 fio_server_op(cmd->opcode), cmd->pdu_len,
736 (unsigned long long) cmd->tag);
737
738 switch (cmd->opcode) {
739 case FIO_NET_CMD_QUIT:
740 fio_terminate_threads(TERMINATE_ALL);
741 return -1;
742 case FIO_NET_CMD_EXIT:
743 exit_backend = 1;
744 return -1;
745 case FIO_NET_CMD_JOB:
746 ret = handle_job_cmd(cmd);
747 break;
748 case FIO_NET_CMD_JOBLINE:
749 ret = handle_jobline_cmd(cmd);
750 break;
751 case FIO_NET_CMD_PROBE:
752 ret = handle_probe_cmd(cmd);
753 break;
754 case FIO_NET_CMD_SEND_ETA:
755 ret = handle_send_eta_cmd(cmd);
756 break;
757 case FIO_NET_CMD_RUN:
758 ret = handle_run_cmd(job_list, cmd);
759 break;
760 case FIO_NET_CMD_UPDATE_JOB:
761 ret = handle_update_job_cmd(cmd);
762 break;
763 default:
764 log_err("fio: unknown opcode: %s\n", fio_server_op(cmd->opcode));
765 ret = 1;
766 }
767
768 return ret;
769}
770
771static int handle_connection(int sk)
772{
773 struct fio_net_cmd *cmd = NULL;
774 FLIST_HEAD(job_list);
775 int ret = 0;
776
777 reset_fio_state();
778 server_fd = sk;
779
780 /* read forever */
781 while (!exit_backend) {
782 struct pollfd pfd = {
783 .fd = sk,
784 .events = POLLIN,
785 };
786
787 ret = 0;
788 do {
789 int timeout = 1000;
790
791 if (!flist_empty(&job_list))
792 timeout = 100;
793
794 ret = poll(&pfd, 1, timeout);
795 if (ret < 0) {
796 if (errno == EINTR)
797 break;
798 log_err("fio: poll: %s\n", strerror(errno));
799 break;
800 } else if (!ret) {
801 fio_server_check_jobs(&job_list);
802 continue;
803 }
804
805 if (pfd.revents & POLLIN)
806 break;
807 if (pfd.revents & (POLLERR|POLLHUP)) {
808 ret = 1;
809 break;
810 }
811 } while (!exit_backend);
812
813 fio_server_check_jobs(&job_list);
814
815 if (ret < 0)
816 break;
817
818 cmd = fio_net_recv_cmd(sk);
819 if (!cmd) {
820 ret = -1;
821 break;
822 }
823
824 ret = handle_command(&job_list, cmd);
825 if (ret)
826 break;
827
828 free(cmd);
829 cmd = NULL;
830 }
831
832 if (cmd)
833 free(cmd);
834
835 close(sk);
836 _exit(ret);
837}
838
839static int accept_loop(int listen_sk)
840{
841 struct sockaddr_in addr;
842 struct sockaddr_in6 addr6;
843 socklen_t len = use_ipv6 ? sizeof(addr6) : sizeof(addr);
844 struct pollfd pfd;
845 int ret = 0, sk, exitval = 0;
846 FLIST_HEAD(conn_list);
847
848 dprint(FD_NET, "server enter accept loop\n");
849
850 fio_set_fd_nonblocking(listen_sk, "server");
851
852 while (!exit_backend) {
853 const char *from;
854 char buf[64];
855 pid_t pid;
856
857 pfd.fd = listen_sk;
858 pfd.events = POLLIN;
859 do {
860 int timeout = 1000;
861
862 if (!flist_empty(&conn_list))
863 timeout = 100;
864
865 ret = poll(&pfd, 1, timeout);
866 if (ret < 0) {
867 if (errno == EINTR)
868 break;
869 log_err("fio: poll: %s\n", strerror(errno));
870 break;
871 } else if (!ret) {
872 fio_server_check_conns(&conn_list);
873 continue;
874 }
875
876 if (pfd.revents & POLLIN)
877 break;
878 } while (!exit_backend);
879
880 fio_server_check_conns(&conn_list);
881
882 if (exit_backend || ret < 0)
883 break;
884
885 if (use_ipv6)
886 sk = accept(listen_sk, (struct sockaddr *) &addr6, &len);
887 else
888 sk = accept(listen_sk, (struct sockaddr *) &addr, &len);
889
890 if (sk < 0) {
891 log_err("fio: accept: %s\n", strerror(errno));
892 return -1;
893 }
894
895 if (use_ipv6)
896 from = inet_ntop(AF_INET6, (struct sockaddr *) &addr6.sin6_addr, buf, sizeof(buf));
897 else
898 from = inet_ntop(AF_INET, (struct sockaddr *) &addr.sin_addr, buf, sizeof(buf));
899
900 dprint(FD_NET, "server: connect from %s\n", from);
901
902 pid = fork();
903 if (pid) {
904 close(sk);
905 fio_server_add_conn_pid(&conn_list, pid);
906 continue;
907 }
908
909 /* exits */
910 handle_connection(sk);
911 }
912
913 return exitval;
914}
915
916int fio_server_text_output(int level, const char *buf, size_t len)
917{
918 struct cmd_text_pdu *pdu;
919 unsigned int tlen;
920 struct timeval tv;
921
922 if (server_fd == -1)
923 return log_local_buf(buf, len);
924
925 tlen = sizeof(*pdu) + len;
926 pdu = malloc(tlen);
927
928 pdu->level = __cpu_to_le32(level);
929 pdu->buf_len = __cpu_to_le32(len);
930
931 gettimeofday(&tv, NULL);
932 pdu->log_sec = __cpu_to_le64(tv.tv_sec);
933 pdu->log_usec = __cpu_to_le64(tv.tv_usec);
934
935 memcpy(pdu->buf, buf, len);
936
937 fio_net_send_cmd(server_fd, FIO_NET_CMD_TEXT, pdu, tlen, NULL, NULL);
938 free(pdu);
939 return len;
940}
941
942static void convert_io_stat(struct io_stat *dst, struct io_stat *src)
943{
944 dst->max_val = cpu_to_le64(src->max_val);
945 dst->min_val = cpu_to_le64(src->min_val);
946 dst->samples = cpu_to_le64(src->samples);
947
948 /*
949 * Encode to IEEE 754 for network transfer
950 */
951 dst->mean.u.i = __cpu_to_le64(fio_double_to_uint64(src->mean.u.f));
952 dst->S.u.i = __cpu_to_le64(fio_double_to_uint64(src->S.u.f));
953}
954
955static void convert_gs(struct group_run_stats *dst, struct group_run_stats *src)
956{
957 int i;
958
959 for (i = 0; i < DDIR_RWDIR_CNT; i++) {
960 dst->max_run[i] = cpu_to_le64(src->max_run[i]);
961 dst->min_run[i] = cpu_to_le64(src->min_run[i]);
962 dst->max_bw[i] = cpu_to_le64(src->max_bw[i]);
963 dst->min_bw[i] = cpu_to_le64(src->min_bw[i]);
964 dst->io_kb[i] = cpu_to_le64(src->io_kb[i]);
965 dst->agg[i] = cpu_to_le64(src->agg[i]);
966 }
967
968 dst->kb_base = cpu_to_le32(src->kb_base);
969 dst->unit_base = cpu_to_le32(src->unit_base);
970 dst->groupid = cpu_to_le32(src->groupid);
971 dst->unified_rw_rep = cpu_to_le32(src->unified_rw_rep);
972}
973
974/*
975 * Send a CMD_TS, which packs struct thread_stat and group_run_stats
976 * into a single payload.
977 */
978void fio_server_send_ts(struct thread_stat *ts, struct group_run_stats *rs)
979{
980 struct cmd_ts_pdu p;
981 int i, j;
982
983 dprint(FD_NET, "server sending end stats\n");
984
985 memset(&p, 0, sizeof(p));
986
987 strncpy(p.ts.name, ts->name, FIO_JOBNAME_SIZE - 1);
988 strncpy(p.ts.verror, ts->verror, FIO_VERROR_SIZE - 1);
989 strncpy(p.ts.description, ts->description, FIO_JOBDESC_SIZE - 1);
990
991 p.ts.error = cpu_to_le32(ts->error);
992 p.ts.thread_number = cpu_to_le32(ts->thread_number);
993 p.ts.groupid = cpu_to_le32(ts->groupid);
994 p.ts.pid = cpu_to_le32(ts->pid);
995 p.ts.members = cpu_to_le32(ts->members);
996 p.ts.unified_rw_rep = cpu_to_le32(ts->unified_rw_rep);
997
998 for (i = 0; i < DDIR_RWDIR_CNT; i++) {
999 convert_io_stat(&p.ts.clat_stat[i], &ts->clat_stat[i]);
1000 convert_io_stat(&p.ts.slat_stat[i], &ts->slat_stat[i]);
1001 convert_io_stat(&p.ts.lat_stat[i], &ts->lat_stat[i]);
1002 convert_io_stat(&p.ts.bw_stat[i], &ts->bw_stat[i]);
1003 }
1004
1005 p.ts.usr_time = cpu_to_le64(ts->usr_time);
1006 p.ts.sys_time = cpu_to_le64(ts->sys_time);
1007 p.ts.ctx = cpu_to_le64(ts->ctx);
1008 p.ts.minf = cpu_to_le64(ts->minf);
1009 p.ts.majf = cpu_to_le64(ts->majf);
1010 p.ts.clat_percentiles = cpu_to_le64(ts->clat_percentiles);
1011
1012 for (i = 0; i < FIO_IO_U_LIST_MAX_LEN; i++) {
1013 fio_fp64_t *src = &ts->percentile_list[i];
1014 fio_fp64_t *dst = &p.ts.percentile_list[i];
1015
1016 dst->u.i = __cpu_to_le64(fio_double_to_uint64(src->u.f));
1017 }
1018
1019 for (i = 0; i < FIO_IO_U_MAP_NR; i++) {
1020 p.ts.io_u_map[i] = cpu_to_le32(ts->io_u_map[i]);
1021 p.ts.io_u_submit[i] = cpu_to_le32(ts->io_u_submit[i]);
1022 p.ts.io_u_complete[i] = cpu_to_le32(ts->io_u_complete[i]);
1023 }
1024
1025 for (i = 0; i < FIO_IO_U_LAT_U_NR; i++) {
1026 p.ts.io_u_lat_u[i] = cpu_to_le32(ts->io_u_lat_u[i]);
1027 p.ts.io_u_lat_m[i] = cpu_to_le32(ts->io_u_lat_m[i]);
1028 }
1029
1030 for (i = 0; i < DDIR_RWDIR_CNT; i++)
1031 for (j = 0; j < FIO_IO_U_PLAT_NR; j++)
1032 p.ts.io_u_plat[i][j] = cpu_to_le32(ts->io_u_plat[i][j]);
1033
1034 for (i = 0; i < DDIR_RWDIR_CNT; i++) {
1035 p.ts.total_io_u[i] = cpu_to_le64(ts->total_io_u[i]);
1036 p.ts.short_io_u[i] = cpu_to_le64(ts->short_io_u[i]);
1037 }
1038
1039 p.ts.total_submit = cpu_to_le64(ts->total_submit);
1040 p.ts.total_complete = cpu_to_le64(ts->total_complete);
1041
1042 for (i = 0; i < DDIR_RWDIR_CNT; i++) {
1043 p.ts.io_bytes[i] = cpu_to_le64(ts->io_bytes[i]);
1044 p.ts.runtime[i] = cpu_to_le64(ts->runtime[i]);
1045 }
1046
1047 p.ts.total_run_time = cpu_to_le64(ts->total_run_time);
1048 p.ts.continue_on_error = cpu_to_le16(ts->continue_on_error);
1049 p.ts.total_err_count = cpu_to_le64(ts->total_err_count);
1050 p.ts.first_error = cpu_to_le32(ts->first_error);
1051 p.ts.kb_base = cpu_to_le32(ts->kb_base);
1052 p.ts.unit_base = cpu_to_le32(ts->unit_base);
1053
1054 p.ts.latency_depth = cpu_to_le32(ts->latency_depth);
1055 p.ts.latency_target = cpu_to_le64(ts->latency_target);
1056 p.ts.latency_window = cpu_to_le64(ts->latency_window);
1057 p.ts.latency_percentile.u.i = __cpu_to_le64(fio_double_to_uint64(ts->latency_percentile.u.f));
1058
1059 convert_gs(&p.rs, rs);
1060
1061 fio_net_send_cmd(server_fd, FIO_NET_CMD_TS, &p, sizeof(p), NULL, NULL);
1062}
1063
1064void fio_server_send_gs(struct group_run_stats *rs)
1065{
1066 struct group_run_stats gs;
1067
1068 dprint(FD_NET, "server sending group run stats\n");
1069
1070 convert_gs(&gs, rs);
1071 fio_net_send_cmd(server_fd, FIO_NET_CMD_GS, &gs, sizeof(gs), NULL, NULL);
1072}
1073
1074static void convert_agg(struct disk_util_agg *dst, struct disk_util_agg *src)
1075{
1076 int i;
1077
1078 for (i = 0; i < 2; i++) {
1079 dst->ios[i] = cpu_to_le32(src->ios[i]);
1080 dst->merges[i] = cpu_to_le32(src->merges[i]);
1081 dst->sectors[i] = cpu_to_le64(src->sectors[i]);
1082 dst->ticks[i] = cpu_to_le32(src->ticks[i]);
1083 }
1084
1085 dst->io_ticks = cpu_to_le32(src->io_ticks);
1086 dst->time_in_queue = cpu_to_le32(src->time_in_queue);
1087 dst->slavecount = cpu_to_le32(src->slavecount);
1088 dst->max_util.u.i = __cpu_to_le64(fio_double_to_uint64(src->max_util.u.f));
1089}
1090
1091static void convert_dus(struct disk_util_stat *dst, struct disk_util_stat *src)
1092{
1093 int i;
1094
1095 dst->name[FIO_DU_NAME_SZ - 1] = '\0';
1096 strncpy((char *) dst->name, (char *) src->name, FIO_DU_NAME_SZ - 1);
1097
1098 for (i = 0; i < 2; i++) {
1099 dst->s.ios[i] = cpu_to_le32(src->s.ios[i]);
1100 dst->s.merges[i] = cpu_to_le32(src->s.merges[i]);
1101 dst->s.sectors[i] = cpu_to_le64(src->s.sectors[i]);
1102 dst->s.ticks[i] = cpu_to_le32(src->s.ticks[i]);
1103 }
1104
1105 dst->s.io_ticks = cpu_to_le32(src->s.io_ticks);
1106 dst->s.time_in_queue = cpu_to_le32(src->s.time_in_queue);
1107 dst->s.msec = cpu_to_le64(src->s.msec);
1108}
1109
1110void fio_server_send_du(void)
1111{
1112 struct disk_util *du;
1113 struct flist_head *entry;
1114 struct cmd_du_pdu pdu;
1115
1116 dprint(FD_NET, "server: sending disk_util %d\n", !flist_empty(&disk_list));
1117
1118 memset(&pdu, 0, sizeof(pdu));
1119
1120 flist_for_each(entry, &disk_list) {
1121 du = flist_entry(entry, struct disk_util, list);
1122
1123 convert_dus(&pdu.dus, &du->dus);
1124 convert_agg(&pdu.agg, &du->agg);
1125
1126 fio_net_send_cmd(server_fd, FIO_NET_CMD_DU, &pdu, sizeof(pdu), NULL, NULL);
1127 }
1128}
1129
1130/*
1131 * Send a command with a separate PDU, not inlined in the command
1132 */
1133static int fio_send_cmd_ext_pdu(int sk, uint16_t opcode, const void *buf,
1134 off_t size, uint64_t tag, uint32_t flags)
1135{
1136 struct fio_net_cmd cmd;
1137 struct iovec iov[2];
1138
1139 iov[0].iov_base = (void *) &cmd;
1140 iov[0].iov_len = sizeof(cmd);
1141 iov[1].iov_base = (void *) buf;
1142 iov[1].iov_len = size;
1143
1144 __fio_init_net_cmd(&cmd, opcode, size, tag);
1145 cmd.flags = __cpu_to_le32(flags);
1146 fio_net_cmd_crc_pdu(&cmd, buf);
1147
1148 return fio_sendv_data(sk, iov, 2);
1149}
1150
1151static int fio_send_iolog_gz(struct cmd_iolog_pdu *pdu, struct io_log *log)
1152{
1153 int ret = 0;
1154#ifdef CONFIG_ZLIB
1155 z_stream stream;
1156 void *out_pdu;
1157
1158 /*
1159 * Dirty - since the log is potentially huge, compress it into
1160 * FIO_SERVER_MAX_FRAGMENT_PDU chunks and let the receiving
1161 * side defragment it.
1162 */
1163 out_pdu = malloc(FIO_SERVER_MAX_FRAGMENT_PDU);
1164
1165 stream.zalloc = Z_NULL;
1166 stream.zfree = Z_NULL;
1167 stream.opaque = Z_NULL;
1168
1169 if (deflateInit(&stream, Z_DEFAULT_COMPRESSION) != Z_OK) {
1170 ret = 1;
1171 goto err;
1172 }
1173
1174 stream.next_in = (void *) log->log;
1175 stream.avail_in = log->nr_samples * sizeof(struct io_sample);
1176
1177 do {
1178 unsigned int this_len, flags = 0;
1179 int ret;
1180
1181 stream.avail_out = FIO_SERVER_MAX_FRAGMENT_PDU;
1182 stream.next_out = out_pdu;
1183 ret = deflate(&stream, Z_FINISH);
1184 /* may be Z_OK, or Z_STREAM_END */
1185 if (ret < 0)
1186 goto err_zlib;
1187
1188 this_len = FIO_SERVER_MAX_FRAGMENT_PDU - stream.avail_out;
1189
1190 if (stream.avail_in)
1191 flags = FIO_NET_CMD_F_MORE;
1192
1193 ret = fio_send_cmd_ext_pdu(server_fd, FIO_NET_CMD_IOLOG,
1194 out_pdu, this_len, 0, flags);
1195 if (ret)
1196 goto err_zlib;
1197 } while (stream.avail_in);
1198
1199err_zlib:
1200 deflateEnd(&stream);
1201err:
1202 free(out_pdu);
1203#endif
1204 return ret;
1205}
1206
1207int fio_send_iolog(struct thread_data *td, struct io_log *log, const char *name)
1208{
1209 struct cmd_iolog_pdu pdu;
1210 int i, ret = 0;
1211
1212 pdu.thread_number = cpu_to_le32(td->thread_number);
1213 pdu.nr_samples = __cpu_to_le32(log->nr_samples);
1214 pdu.log_type = cpu_to_le32(log->log_type);
1215 pdu.compressed = cpu_to_le32(use_zlib);
1216 strcpy((char *) pdu.name, name);
1217
1218 for (i = 0; i < log->nr_samples; i++) {
1219 struct io_sample *s = &log->log[i];
1220
1221 s->time = cpu_to_le64(s->time);
1222 s->val = cpu_to_le64(s->val);
1223 s->ddir = cpu_to_le32(s->ddir);
1224 s->bs = cpu_to_le32(s->bs);
1225 }
1226
1227 /*
1228 * Send header first, it's not compressed.
1229 */
1230 ret = fio_send_cmd_ext_pdu(server_fd, FIO_NET_CMD_IOLOG, &pdu,
1231 sizeof(pdu), 0, FIO_NET_CMD_F_MORE);
1232 if (ret)
1233 return ret;
1234
1235 /*
1236 * Now send actual log, compress if we can, otherwise just plain
1237 */
1238 if (use_zlib)
1239 return fio_send_iolog_gz(&pdu, log);
1240
1241 return fio_send_cmd_ext_pdu(server_fd, FIO_NET_CMD_IOLOG, log->log,
1242 log->nr_samples * sizeof(struct io_sample), 0, 0);
1243}
1244
1245void fio_server_send_add_job(struct thread_data *td)
1246{
1247 struct cmd_add_job_pdu pdu;
1248
1249 memset(&pdu, 0, sizeof(pdu));
1250 pdu.thread_number = cpu_to_le32(td->thread_number);
1251 pdu.groupid = cpu_to_le32(td->groupid);
1252 convert_thread_options_to_net(&pdu.top, &td->o);
1253
1254 fio_net_send_cmd(server_fd, FIO_NET_CMD_ADD_JOB, &pdu, sizeof(pdu), NULL, NULL);
1255}
1256
1257void fio_server_send_start(struct thread_data *td)
1258{
1259 assert(server_fd != -1);
1260
1261 fio_net_send_simple_cmd(server_fd, FIO_NET_CMD_SERVER_START, 0, NULL);
1262}
1263
1264static int fio_init_server_ip(void)
1265{
1266 struct sockaddr *addr;
1267 socklen_t socklen;
1268 char buf[80];
1269 const char *str;
1270 int sk, opt;
1271
1272 if (use_ipv6)
1273 sk = socket(AF_INET6, SOCK_STREAM, 0);
1274 else
1275 sk = socket(AF_INET, SOCK_STREAM, 0);
1276
1277 if (sk < 0) {
1278 log_err("fio: socket: %s\n", strerror(errno));
1279 return -1;
1280 }
1281
1282 opt = 1;
1283 if (setsockopt(sk, SOL_SOCKET, SO_REUSEADDR, (void *)&opt, sizeof(opt)) < 0) {
1284 log_err("fio: setsockopt: %s\n", strerror(errno));
1285 close(sk);
1286 return -1;
1287 }
1288#ifdef SO_REUSEPORT
1289 if (setsockopt(sk, SOL_SOCKET, SO_REUSEPORT, &opt, sizeof(opt)) < 0) {
1290 log_err("fio: setsockopt: %s\n", strerror(errno));
1291 close(sk);
1292 return -1;
1293 }
1294#endif
1295
1296 if (use_ipv6) {
1297 const void *src = &saddr_in6.sin6_addr;
1298
1299 addr = (struct sockaddr *) &saddr_in6;
1300 socklen = sizeof(saddr_in6);
1301 saddr_in6.sin6_family = AF_INET6;
1302 str = inet_ntop(AF_INET6, src, buf, sizeof(buf));
1303 } else {
1304 const void *src = &saddr_in.sin_addr;
1305
1306 addr = (struct sockaddr *) &saddr_in;
1307 socklen = sizeof(saddr_in);
1308 saddr_in.sin_family = AF_INET;
1309 str = inet_ntop(AF_INET, src, buf, sizeof(buf));
1310 }
1311
1312 if (bind(sk, addr, socklen) < 0) {
1313 log_err("fio: bind: %s\n", strerror(errno));
1314 log_info("fio: failed with IPv%c %s\n", use_ipv6 ? '6' : '4', str);
1315 close(sk);
1316 return -1;
1317 }
1318
1319 return sk;
1320}
1321
1322static int fio_init_server_sock(void)
1323{
1324 struct sockaddr_un addr;
1325 socklen_t len;
1326 mode_t mode;
1327 int sk;
1328
1329 sk = socket(AF_UNIX, SOCK_STREAM, 0);
1330 if (sk < 0) {
1331 log_err("fio: socket: %s\n", strerror(errno));
1332 return -1;
1333 }
1334
1335 mode = umask(000);
1336
1337 memset(&addr, 0, sizeof(addr));
1338 addr.sun_family = AF_UNIX;
1339 strncpy(addr.sun_path, bind_sock, sizeof(addr.sun_path) - 1);
1340
1341 len = sizeof(addr.sun_family) + strlen(bind_sock) + 1;
1342
1343 if (bind(sk, (struct sockaddr *) &addr, len) < 0) {
1344 log_err("fio: bind: %s\n", strerror(errno));
1345 close(sk);
1346 return -1;
1347 }
1348
1349 umask(mode);
1350 return sk;
1351}
1352
1353static int fio_init_server_connection(void)
1354{
1355 char bind_str[128];
1356 int sk;
1357
1358 dprint(FD_NET, "starting server\n");
1359
1360 if (!bind_sock)
1361 sk = fio_init_server_ip();
1362 else
1363 sk = fio_init_server_sock();
1364
1365 if (sk < 0)
1366 return sk;
1367
1368 memset(bind_str, 0, sizeof(bind_str));
1369
1370 if (!bind_sock) {
1371 char *p, port[16];
1372 const void *src;
1373 int af;
1374
1375 if (use_ipv6) {
1376 af = AF_INET6;
1377 src = &saddr_in6.sin6_addr;
1378 } else {
1379 af = AF_INET;
1380 src = &saddr_in.sin_addr;
1381 }
1382
1383 p = (char *) inet_ntop(af, src, bind_str, sizeof(bind_str));
1384
1385 sprintf(port, ",%u", fio_net_port);
1386 if (p)
1387 strcat(p, port);
1388 else
1389 strncpy(bind_str, port, sizeof(bind_str) - 1);
1390 } else
1391 strncpy(bind_str, bind_sock, sizeof(bind_str) - 1);
1392
1393 log_info("fio: server listening on %s\n", bind_str);
1394
1395 if (listen(sk, 0) < 0) {
1396 log_err("fio: listen: %s\n", strerror(errno));
1397 close(sk);
1398 return -1;
1399 }
1400
1401 return sk;
1402}
1403
1404int fio_server_parse_host(const char *host, int ipv6, struct in_addr *inp,
1405 struct in6_addr *inp6)
1406
1407{
1408 int ret = 0;
1409
1410 if (ipv6)
1411 ret = inet_pton(AF_INET6, host, inp6);
1412 else
1413 ret = inet_pton(AF_INET, host, inp);
1414
1415 if (ret != 1) {
1416 struct addrinfo hints, *res;
1417
1418 memset(&hints, 0, sizeof(hints));
1419 hints.ai_family = ipv6 ? AF_INET6 : AF_INET;
1420 hints.ai_socktype = SOCK_STREAM;
1421
1422 ret = getaddrinfo(host, NULL, &hints, &res);
1423 if (ret) {
1424 log_err("fio: failed to resolve <%s> (%s)\n", host,
1425 gai_strerror(ret));
1426 return 1;
1427 }
1428
1429 if (ipv6)
1430 memcpy(inp6, &((struct sockaddr_in6 *) res->ai_addr)->sin6_addr, sizeof(*inp6));
1431 else
1432 memcpy(inp, &((struct sockaddr_in *) res->ai_addr)->sin_addr, sizeof(*inp));
1433
1434 ret = 1;
1435 freeaddrinfo(res);
1436 }
1437
1438 return !(ret == 1);
1439}
1440
1441/*
1442 * Parse a host/ip/port string. Reads from 'str'.
1443 *
1444 * Outputs:
1445 *
1446 * For IPv4:
1447 * *ptr is the host, *port is the port, inp is the destination.
1448 * For IPv6:
1449 * *ptr is the host, *port is the port, inp6 is the dest, and *ipv6 is 1.
1450 * For local domain sockets:
1451 * *ptr is the filename, *is_sock is 1.
1452 */
1453int fio_server_parse_string(const char *str, char **ptr, int *is_sock,
1454 int *port, struct in_addr *inp,
1455 struct in6_addr *inp6, int *ipv6)
1456{
1457 const char *host = str;
1458 char *portp;
1459 int lport = 0;
1460
1461 *ptr = NULL;
1462 *is_sock = 0;
1463 *port = fio_net_port;
1464 *ipv6 = 0;
1465
1466 if (!strncmp(str, "sock:", 5)) {
1467 *ptr = strdup(str + 5);
1468 *is_sock = 1;
1469
1470 return 0;
1471 }
1472
1473 /*
1474 * Is it ip:<ip or host>:port
1475 */
1476 if (!strncmp(host, "ip:", 3))
1477 host += 3;
1478 else if (!strncmp(host, "ip4:", 4))
1479 host += 4;
1480 else if (!strncmp(host, "ip6:", 4)) {
1481 host += 4;
1482 *ipv6 = 1;
1483 } else if (host[0] == ':') {
1484 /* String is :port */
1485 host++;
1486 lport = atoi(host);
1487 if (!lport || lport > 65535) {
1488 log_err("fio: bad server port %u\n", lport);
1489 return 1;
1490 }
1491 /* no hostname given, we are done */
1492 *port = lport;
1493 return 0;
1494 }
1495
1496 /*
1497 * If no port seen yet, check if there's a last ',' at the end
1498 */
1499 if (!lport) {
1500 portp = strchr(host, ',');
1501 if (portp) {
1502 *portp = '\0';
1503 portp++;
1504 lport = atoi(portp);
1505 if (!lport || lport > 65535) {
1506 log_err("fio: bad server port %u\n", lport);
1507 return 1;
1508 }
1509 }
1510 }
1511
1512 if (lport)
1513 *port = lport;
1514
1515 if (!strlen(host))
1516 return 0;
1517
1518 *ptr = strdup(host);
1519
1520 if (fio_server_parse_host(*ptr, *ipv6, inp, inp6)) {
1521 free(*ptr);
1522 *ptr = NULL;
1523 return 1;
1524 }
1525
1526 if (*port == 0)
1527 *port = fio_net_port;
1528
1529 return 0;
1530}
1531
1532/*
1533 * Server arg should be one of:
1534 *
1535 * sock:/path/to/socket
1536 * ip:1.2.3.4
1537 * 1.2.3.4
1538 *
1539 * Where sock uses unix domain sockets, and ip binds the server to
1540 * a specific interface. If no arguments are given to the server, it
1541 * uses IP and binds to 0.0.0.0.
1542 *
1543 */
1544static int fio_handle_server_arg(void)
1545{
1546 int port = fio_net_port;
1547 int is_sock, ret = 0;
1548
1549 saddr_in.sin_addr.s_addr = htonl(INADDR_ANY);
1550
1551 if (!fio_server_arg)
1552 goto out;
1553
1554 ret = fio_server_parse_string(fio_server_arg, &bind_sock, &is_sock,
1555 &port, &saddr_in.sin_addr,
1556 &saddr_in6.sin6_addr, &use_ipv6);
1557
1558 if (!is_sock && bind_sock) {
1559 free(bind_sock);
1560 bind_sock = NULL;
1561 }
1562
1563out:
1564 fio_net_port = port;
1565 saddr_in.sin_port = htons(port);
1566 saddr_in6.sin6_port = htons(port);
1567 return ret;
1568}
1569
1570static void sig_int(int sig)
1571{
1572 if (bind_sock)
1573 unlink(bind_sock);
1574}
1575
1576static void set_sig_handlers(void)
1577{
1578 struct sigaction act;
1579
1580 memset(&act, 0, sizeof(act));
1581 act.sa_handler = sig_int;
1582 act.sa_flags = SA_RESTART;
1583 sigaction(SIGINT, &act, NULL);
1584}
1585
1586static int fio_server(void)
1587{
1588 int sk, ret;
1589
1590 dprint(FD_NET, "starting server\n");
1591
1592 if (fio_handle_server_arg())
1593 return -1;
1594
1595 sk = fio_init_server_connection();
1596 if (sk < 0)
1597 return -1;
1598
1599 set_sig_handlers();
1600
1601 ret = accept_loop(sk);
1602
1603 close(sk);
1604
1605 if (fio_server_arg) {
1606 free(fio_server_arg);
1607 fio_server_arg = NULL;
1608 }
1609 if (bind_sock)
1610 free(bind_sock);
1611
1612 return ret;
1613}
1614
1615void fio_server_got_signal(int signal)
1616{
1617 if (signal == SIGPIPE)
1618 server_fd = -1;
1619 else {
1620 log_info("\nfio: terminating on signal %d\n", signal);
1621 exit_backend = 1;
1622 }
1623}
1624
1625static int check_existing_pidfile(const char *pidfile)
1626{
1627 struct stat sb;
1628 char buf[16];
1629 pid_t pid;
1630 FILE *f;
1631
1632 if (stat(pidfile, &sb))
1633 return 0;
1634
1635 f = fopen(pidfile, "r");
1636 if (!f)
1637 return 0;
1638
1639 if (fread(buf, sb.st_size, 1, f) <= 0) {
1640 fclose(f);
1641 return 1;
1642 }
1643 fclose(f);
1644
1645 pid = atoi(buf);
1646 if (kill(pid, SIGCONT) < 0)
1647 return errno != ESRCH;
1648
1649 return 1;
1650}
1651
1652static int write_pid(pid_t pid, const char *pidfile)
1653{
1654 FILE *fpid;
1655
1656 fpid = fopen(pidfile, "w");
1657 if (!fpid) {
1658 log_err("fio: failed opening pid file %s\n", pidfile);
1659 return 1;
1660 }
1661
1662 fprintf(fpid, "%u\n", (unsigned int) pid);
1663 fclose(fpid);
1664 return 0;
1665}
1666
1667/*
1668 * If pidfile is specified, background us.
1669 */
1670int fio_start_server(char *pidfile)
1671{
1672 pid_t pid;
1673 int ret;
1674
1675#if defined(WIN32)
1676 WSADATA wsd;
1677 WSAStartup(MAKEWORD(2, 2), &wsd);
1678#endif
1679
1680 if (!pidfile)
1681 return fio_server();
1682
1683 if (check_existing_pidfile(pidfile)) {
1684 log_err("fio: pidfile %s exists and server appears alive\n",
1685 pidfile);
1686 free(pidfile);
1687 return -1;
1688 }
1689
1690 pid = fork();
1691 if (pid < 0) {
1692 log_err("fio: failed server fork: %s", strerror(errno));
1693 free(pidfile);
1694 return -1;
1695 } else if (pid) {
1696 int ret = write_pid(pid, pidfile);
1697
1698 free(pidfile);
1699 exit(ret);
1700 }
1701
1702 setsid();
1703 openlog("fio", LOG_NDELAY|LOG_NOWAIT|LOG_PID, LOG_USER);
1704 log_syslog = 1;
1705 close(STDIN_FILENO);
1706 close(STDOUT_FILENO);
1707 close(STDERR_FILENO);
1708 f_out = NULL;
1709 f_err = NULL;
1710
1711 ret = fio_server();
1712
1713 closelog();
1714 unlink(pidfile);
1715 free(pidfile);
1716 return ret;
1717}
1718
1719void fio_server_set_arg(const char *arg)
1720{
1721 fio_server_arg = strdup(arg);
1722}
fio - Flexible IO Tester