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server: sanity check incoming command size (and payload)
[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 <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, *tmp, *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 if (cmd_size / 1024 > FIO_SERVER_MAX_CMD_MB * 1024) {
235 log_err("fio: cmd+pdu too large (%llu)\n", (unsigned long long) cmd_size);
236 ret = 1;
237 break;
238 }
239
240 tmp = realloc(cmdret, cmd_size);
241 if (!tmp) {
242 log_err("fio: server failed allocating cmd\n");
243 ret = 1;
244 break;
245 }
246 cmdret = tmp;
247
248 if (first)
249 memcpy(cmdret, &cmd, sizeof(cmd));
250 else if (cmdret->opcode != cmd.opcode) {
251 log_err("fio: fragment opcode mismatch (%d != %d)\n",
252 cmdret->opcode, cmd.opcode);
253 ret = 1;
254 break;
255 }
256
257 if (!cmd.pdu_len)
258 break;
259
260 /* There's payload, get it */
261 pdu = (void *) cmdret->payload + pdu_offset;
262 ret = fio_recv_data(sk, pdu, cmd.pdu_len);
263 if (ret)
264 break;
265
266 /* Verify payload crc */
267 crc = fio_crc16(pdu, cmd.pdu_len);
268 if (crc != cmd.pdu_crc16) {
269 log_err("fio: server bad crc on payload ");
270 log_err("(got %x, wanted %x)\n", cmd.pdu_crc16, crc);
271 ret = 1;
272 break;
273 }
274
275 pdu_offset += cmd.pdu_len;
276 if (!first)
277 cmdret->pdu_len += cmd.pdu_len;
278 first = 0;
279 } while (cmd.flags & FIO_NET_CMD_F_MORE);
280
281 if (ret) {
282 free(cmdret);
283 cmdret = NULL;
284 } else if (cmdret) {
285 /* zero-terminate text input */
286 if (cmdret->pdu_len) {
287 if (cmdret->opcode == FIO_NET_CMD_TEXT) {
288 struct cmd_text_pdu *pdu = (struct cmd_text_pdu *) cmdret->payload;
289 char *buf = (char *) pdu->buf;
290
291 buf[pdu->buf_len] = '\0';
292 } else if (cmdret->opcode == FIO_NET_CMD_JOB) {
293 struct cmd_job_pdu *pdu = (struct cmd_job_pdu *) cmdret->payload;
294 char *buf = (char *) pdu->buf;
295 int len = le32_to_cpu(pdu->buf_len);
296
297 buf[len] = '\0';
298 }
299 }
300
301 /* frag flag is internal */
302 cmdret->flags &= ~FIO_NET_CMD_F_MORE;
303 }
304
305 return cmdret;
306}
307
308static void add_reply(uint64_t tag, struct flist_head *list)
309{
310 struct fio_net_cmd_reply *reply;
311
312 reply = (struct fio_net_cmd_reply *) (uintptr_t) tag;
313 flist_add_tail(&reply->list, list);
314}
315
316static uint64_t alloc_reply(uint64_t tag, uint16_t opcode)
317{
318 struct fio_net_cmd_reply *reply;
319
320 reply = calloc(1, sizeof(*reply));
321 INIT_FLIST_HEAD(&reply->list);
322 gettimeofday(&reply->tv, NULL);
323 reply->saved_tag = tag;
324 reply->opcode = opcode;
325
326 return (uintptr_t) reply;
327}
328
329static void free_reply(uint64_t tag)
330{
331 struct fio_net_cmd_reply *reply;
332
333 reply = (struct fio_net_cmd_reply *) (uintptr_t) tag;
334 free(reply);
335}
336
337void fio_net_cmd_crc_pdu(struct fio_net_cmd *cmd, const void *pdu)
338{
339 uint32_t pdu_len;
340
341 cmd->cmd_crc16 = __cpu_to_le16(fio_crc16(cmd, FIO_NET_CMD_CRC_SZ));
342
343 pdu_len = le32_to_cpu(cmd->pdu_len);
344 cmd->pdu_crc16 = __cpu_to_le16(fio_crc16(pdu, pdu_len));
345}
346
347void fio_net_cmd_crc(struct fio_net_cmd *cmd)
348{
349 fio_net_cmd_crc_pdu(cmd, cmd->payload);
350}
351
352int fio_net_send_cmd(int fd, uint16_t opcode, const void *buf, off_t size,
353 uint64_t *tagptr, struct flist_head *list)
354{
355 struct fio_net_cmd *cmd = NULL;
356 size_t this_len, cur_len = 0;
357 uint64_t tag;
358 int ret;
359
360 if (list) {
361 assert(tagptr);
362 tag = *tagptr = alloc_reply(*tagptr, opcode);
363 } else
364 tag = tagptr ? *tagptr : 0;
365
366 do {
367 this_len = size;
368 if (this_len > FIO_SERVER_MAX_FRAGMENT_PDU)
369 this_len = FIO_SERVER_MAX_FRAGMENT_PDU;
370
371 if (!cmd || cur_len < sizeof(*cmd) + this_len) {
372 if (cmd)
373 free(cmd);
374
375 cur_len = sizeof(*cmd) + this_len;
376 cmd = malloc(cur_len);
377 }
378
379 fio_init_net_cmd(cmd, opcode, buf, this_len, tag);
380
381 if (this_len < size)
382 cmd->flags = __cpu_to_le32(FIO_NET_CMD_F_MORE);
383
384 fio_net_cmd_crc(cmd);
385
386 ret = fio_send_data(fd, cmd, sizeof(*cmd) + this_len);
387 size -= this_len;
388 buf += this_len;
389 } while (!ret && size);
390
391 if (list) {
392 if (ret)
393 free_reply(tag);
394 else
395 add_reply(tag, list);
396 }
397
398 if (cmd)
399 free(cmd);
400
401 return ret;
402}
403
404static int fio_net_send_simple_stack_cmd(int sk, uint16_t opcode, uint64_t tag)
405{
406 struct fio_net_cmd cmd;
407
408 fio_init_net_cmd(&cmd, opcode, NULL, 0, tag);
409 fio_net_cmd_crc(&cmd);
410
411 return fio_send_data(sk, &cmd, sizeof(cmd));
412}
413
414/*
415 * If 'list' is non-NULL, then allocate and store the sent command for
416 * later verification.
417 */
418int fio_net_send_simple_cmd(int sk, uint16_t opcode, uint64_t tag,
419 struct flist_head *list)
420{
421 int ret;
422
423 if (list)
424 tag = alloc_reply(tag, opcode);
425
426 ret = fio_net_send_simple_stack_cmd(sk, opcode, tag);
427 if (ret) {
428 if (list)
429 free_reply(tag);
430
431 return ret;
432 }
433
434 if (list)
435 add_reply(tag, list);
436
437 return 0;
438}
439
440int fio_net_send_quit(int sk)
441{
442 dprint(FD_NET, "server: sending quit\n");
443
444 return fio_net_send_simple_cmd(sk, FIO_NET_CMD_QUIT, 0, NULL);
445}
446
447static int fio_net_send_ack(int sk, struct fio_net_cmd *cmd, int error,
448 int signal)
449{
450 struct cmd_end_pdu epdu;
451 uint64_t tag = 0;
452
453 if (cmd)
454 tag = cmd->tag;
455
456 epdu.error = __cpu_to_le32(error);
457 epdu.signal = __cpu_to_le32(signal);
458 return fio_net_send_cmd(sk, FIO_NET_CMD_STOP, &epdu, sizeof(epdu), &tag, NULL);
459}
460
461int fio_net_send_stop(int sk, int error, int signal)
462{
463 dprint(FD_NET, "server: sending stop (%d, %d)\n", error, signal);
464 return fio_net_send_ack(sk, NULL, error, signal);
465}
466
467static void fio_server_add_fork_item(pid_t pid, struct flist_head *list)
468{
469 struct fio_fork_item *ffi;
470
471 ffi = malloc(sizeof(*ffi));
472 ffi->exitval = 0;
473 ffi->signal = 0;
474 ffi->exited = 0;
475 ffi->pid = pid;
476 flist_add_tail(&ffi->list, list);
477}
478
479static void fio_server_add_conn_pid(struct flist_head *conn_list, pid_t pid)
480{
481 dprint(FD_NET, "server: forked off connection job (pid=%u)\n", (int) pid);
482 fio_server_add_fork_item(pid, conn_list);
483}
484
485static void fio_server_add_job_pid(struct flist_head *job_list, pid_t pid)
486{
487 dprint(FD_NET, "server: forked off job job (pid=%u)\n", (int) pid);
488 fio_server_add_fork_item(pid, job_list);
489}
490
491static void fio_server_check_fork_item(struct fio_fork_item *ffi)
492{
493 int ret, status;
494
495 ret = waitpid(ffi->pid, &status, WNOHANG);
496 if (ret < 0) {
497 if (errno == ECHILD) {
498 log_err("fio: connection pid %u disappeared\n", (int) ffi->pid);
499 ffi->exited = 1;
500 } else
501 log_err("fio: waitpid: %s\n", strerror(errno));
502 } else if (ret == ffi->pid) {
503 if (WIFSIGNALED(status)) {
504 ffi->signal = WTERMSIG(status);
505 ffi->exited = 1;
506 }
507 if (WIFEXITED(status)) {
508 if (WEXITSTATUS(status))
509 ffi->exitval = WEXITSTATUS(status);
510 ffi->exited = 1;
511 }
512 }
513}
514
515static void fio_server_fork_item_done(struct fio_fork_item *ffi)
516{
517 dprint(FD_NET, "pid %u exited, sig=%u, exitval=%d\n", (int) ffi->pid, ffi->signal, ffi->exitval);
518
519 /*
520 * Fold STOP and QUIT...
521 */
522 fio_net_send_stop(server_fd, ffi->exitval, ffi->signal);
523 fio_net_send_quit(server_fd);
524 flist_del(&ffi->list);
525 free(ffi);
526}
527
528static void fio_server_check_fork_items(struct flist_head *list)
529{
530 struct flist_head *entry, *tmp;
531 struct fio_fork_item *ffi;
532
533 flist_for_each_safe(entry, tmp, list) {
534 ffi = flist_entry(entry, struct fio_fork_item, list);
535
536 fio_server_check_fork_item(ffi);
537
538 if (ffi->exited)
539 fio_server_fork_item_done(ffi);
540 }
541}
542
543static void fio_server_check_jobs(struct flist_head *job_list)
544{
545 fio_server_check_fork_items(job_list);
546}
547
548static void fio_server_check_conns(struct flist_head *conn_list)
549{
550 fio_server_check_fork_items(conn_list);
551}
552
553static int handle_run_cmd(struct flist_head *job_list, struct fio_net_cmd *cmd)
554{
555 pid_t pid;
556 int ret;
557
558 set_genesis_time();
559
560 pid = fork();
561 if (pid) {
562 fio_server_add_job_pid(job_list, pid);
563 return 0;
564 }
565
566 ret = fio_backend();
567 free_threads_shm();
568 _exit(ret);
569}
570
571static int handle_job_cmd(struct fio_net_cmd *cmd)
572{
573 struct cmd_job_pdu *pdu = (struct cmd_job_pdu *) cmd->payload;
574 void *buf = pdu->buf;
575 struct cmd_start_pdu spdu;
576
577 pdu->buf_len = le32_to_cpu(pdu->buf_len);
578 pdu->client_type = le32_to_cpu(pdu->client_type);
579
580 if (parse_jobs_ini(buf, 1, 0, pdu->client_type)) {
581 fio_net_send_quit(server_fd);
582 return -1;
583 }
584
585 spdu.jobs = cpu_to_le32(thread_number);
586 spdu.stat_outputs = cpu_to_le32(stat_number);
587 fio_net_send_cmd(server_fd, FIO_NET_CMD_START, &spdu, sizeof(spdu), NULL, NULL);
588 return 0;
589}
590
591static int handle_jobline_cmd(struct fio_net_cmd *cmd)
592{
593 void *pdu = cmd->payload;
594 struct cmd_single_line_pdu *cslp;
595 struct cmd_line_pdu *clp;
596 unsigned long offset;
597 struct cmd_start_pdu spdu;
598 char **argv;
599 int i;
600
601 clp = pdu;
602 clp->lines = le16_to_cpu(clp->lines);
603 clp->client_type = le16_to_cpu(clp->client_type);
604 argv = malloc(clp->lines * sizeof(char *));
605 offset = sizeof(*clp);
606
607 dprint(FD_NET, "server: %d command line args\n", clp->lines);
608
609 for (i = 0; i < clp->lines; i++) {
610 cslp = pdu + offset;
611 argv[i] = (char *) cslp->text;
612
613 offset += sizeof(*cslp) + le16_to_cpu(cslp->len);
614 dprint(FD_NET, "server: %d: %s\n", i, argv[i]);
615 }
616
617 if (parse_cmd_line(clp->lines, argv, clp->client_type)) {
618 fio_net_send_quit(server_fd);
619 free(argv);
620 return -1;
621 }
622
623 free(argv);
624
625 spdu.jobs = cpu_to_le32(thread_number);
626 spdu.stat_outputs = cpu_to_le32(stat_number);
627 fio_net_send_cmd(server_fd, FIO_NET_CMD_START, &spdu, sizeof(spdu), NULL, NULL);
628 return 0;
629}
630
631static int handle_probe_cmd(struct fio_net_cmd *cmd)
632{
633 struct cmd_client_probe_pdu *pdu = (struct cmd_client_probe_pdu *) cmd->payload;
634 struct cmd_probe_reply_pdu probe;
635 uint64_t tag = cmd->tag;
636
637 dprint(FD_NET, "server: sending probe reply\n");
638
639 memset(&probe, 0, sizeof(probe));
640 gethostname((char *) probe.hostname, sizeof(probe.hostname));
641#ifdef CONFIG_BIG_ENDIAN
642 probe.bigendian = 1;
643#endif
644 strncpy((char *) probe.fio_version, fio_version_string, sizeof(probe.fio_version));
645
646 probe.os = FIO_OS;
647 probe.arch = FIO_ARCH;
648 probe.bpp = sizeof(void *);
649 probe.cpus = __cpu_to_le32(cpus_online());
650
651 /*
652 * If the client supports compression and we do too, then enable it
653 */
654 if (has_zlib && le64_to_cpu(pdu->flags) & FIO_PROBE_FLAG_ZLIB) {
655 probe.flags = __cpu_to_le64(FIO_PROBE_FLAG_ZLIB);
656 use_zlib = 1;
657 } else {
658 probe.flags = 0;
659 use_zlib = 0;
660 }
661
662 return fio_net_send_cmd(server_fd, FIO_NET_CMD_PROBE, &probe, sizeof(probe), &tag, NULL);
663}
664
665static int handle_send_eta_cmd(struct fio_net_cmd *cmd)
666{
667 struct jobs_eta *je;
668 size_t size;
669 uint64_t tag = cmd->tag;
670 int i;
671
672 if (!thread_number)
673 return 0;
674
675 size = sizeof(*je) + thread_number * sizeof(char) + 1;
676 je = malloc(size);
677 memset(je, 0, size);
678
679 if (!calc_thread_status(je, 1)) {
680 free(je);
681 return 0;
682 }
683
684 dprint(FD_NET, "server sending status\n");
685
686 je->nr_running = cpu_to_le32(je->nr_running);
687 je->nr_ramp = cpu_to_le32(je->nr_ramp);
688 je->nr_pending = cpu_to_le32(je->nr_pending);
689 je->nr_setting_up = cpu_to_le32(je->nr_setting_up);
690 je->files_open = cpu_to_le32(je->files_open);
691
692 for (i = 0; i < DDIR_RWDIR_CNT; i++) {
693 je->m_rate[i] = cpu_to_le32(je->m_rate[i]);
694 je->t_rate[i] = cpu_to_le32(je->t_rate[i]);
695 je->m_iops[i] = cpu_to_le32(je->m_iops[i]);
696 je->t_iops[i] = cpu_to_le32(je->t_iops[i]);
697 je->rate[i] = cpu_to_le32(je->rate[i]);
698 je->iops[i] = cpu_to_le32(je->iops[i]);
699 }
700
701 je->elapsed_sec = cpu_to_le64(je->elapsed_sec);
702 je->eta_sec = cpu_to_le64(je->eta_sec);
703 je->nr_threads = cpu_to_le32(je->nr_threads);
704 je->is_pow2 = cpu_to_le32(je->is_pow2);
705 je->unit_base = cpu_to_le32(je->unit_base);
706
707 fio_net_send_cmd(server_fd, FIO_NET_CMD_ETA, je, size, &tag, NULL);
708 free(je);
709 return 0;
710}
711
712static int send_update_job_reply(int fd, uint64_t __tag, int error)
713{
714 uint64_t tag = __tag;
715 uint32_t pdu_error;
716
717 pdu_error = __cpu_to_le32(error);
718 return fio_net_send_cmd(fd, FIO_NET_CMD_UPDATE_JOB, &pdu_error, sizeof(pdu_error), &tag, NULL);
719}
720
721static int handle_update_job_cmd(struct fio_net_cmd *cmd)
722{
723 struct cmd_add_job_pdu *pdu = (struct cmd_add_job_pdu *) cmd->payload;
724 struct thread_data *td;
725 uint32_t tnumber;
726
727 tnumber = le32_to_cpu(pdu->thread_number);
728
729 dprint(FD_NET, "server: updating options for job %u\n", tnumber);
730
731 if (!tnumber || tnumber > thread_number) {
732 send_update_job_reply(server_fd, cmd->tag, ENODEV);
733 return 0;
734 }
735
736 td = &threads[tnumber - 1];
737 convert_thread_options_to_cpu(&td->o, &pdu->top);
738 send_update_job_reply(server_fd, cmd->tag, 0);
739 return 0;
740}
741
742static int handle_command(struct flist_head *job_list, struct fio_net_cmd *cmd)
743{
744 int ret;
745
746 dprint(FD_NET, "server: got op [%s], pdu=%u, tag=%llx\n",
747 fio_server_op(cmd->opcode), cmd->pdu_len,
748 (unsigned long long) cmd->tag);
749
750 switch (cmd->opcode) {
751 case FIO_NET_CMD_QUIT:
752 fio_terminate_threads(TERMINATE_ALL);
753 return -1;
754 case FIO_NET_CMD_EXIT:
755 exit_backend = 1;
756 return -1;
757 case FIO_NET_CMD_JOB:
758 ret = handle_job_cmd(cmd);
759 break;
760 case FIO_NET_CMD_JOBLINE:
761 ret = handle_jobline_cmd(cmd);
762 break;
763 case FIO_NET_CMD_PROBE:
764 ret = handle_probe_cmd(cmd);
765 break;
766 case FIO_NET_CMD_SEND_ETA:
767 ret = handle_send_eta_cmd(cmd);
768 break;
769 case FIO_NET_CMD_RUN:
770 ret = handle_run_cmd(job_list, cmd);
771 break;
772 case FIO_NET_CMD_UPDATE_JOB:
773 ret = handle_update_job_cmd(cmd);
774 break;
775 default:
776 log_err("fio: unknown opcode: %s\n", fio_server_op(cmd->opcode));
777 ret = 1;
778 }
779
780 return ret;
781}
782
783static int handle_connection(int sk)
784{
785 struct fio_net_cmd *cmd = NULL;
786 FLIST_HEAD(job_list);
787 int ret = 0;
788
789 reset_fio_state();
790 server_fd = sk;
791
792 /* read forever */
793 while (!exit_backend) {
794 struct pollfd pfd = {
795 .fd = sk,
796 .events = POLLIN,
797 };
798
799 ret = 0;
800 do {
801 int timeout = 1000;
802
803 if (!flist_empty(&job_list))
804 timeout = 100;
805
806 ret = poll(&pfd, 1, timeout);
807 if (ret < 0) {
808 if (errno == EINTR)
809 break;
810 log_err("fio: poll: %s\n", strerror(errno));
811 break;
812 } else if (!ret) {
813 fio_server_check_jobs(&job_list);
814 continue;
815 }
816
817 if (pfd.revents & POLLIN)
818 break;
819 if (pfd.revents & (POLLERR|POLLHUP)) {
820 ret = 1;
821 break;
822 }
823 } while (!exit_backend);
824
825 fio_server_check_jobs(&job_list);
826
827 if (ret < 0)
828 break;
829
830 cmd = fio_net_recv_cmd(sk);
831 if (!cmd) {
832 ret = -1;
833 break;
834 }
835
836 ret = handle_command(&job_list, cmd);
837 if (ret)
838 break;
839
840 free(cmd);
841 cmd = NULL;
842 }
843
844 if (cmd)
845 free(cmd);
846
847 close(sk);
848 _exit(ret);
849}
850
851static int accept_loop(int listen_sk)
852{
853 struct sockaddr_in addr;
854 struct sockaddr_in6 addr6;
855 socklen_t len = use_ipv6 ? sizeof(addr6) : sizeof(addr);
856 struct pollfd pfd;
857 int ret = 0, sk, exitval = 0;
858 FLIST_HEAD(conn_list);
859
860 dprint(FD_NET, "server enter accept loop\n");
861
862 fio_set_fd_nonblocking(listen_sk, "server");
863
864 while (!exit_backend) {
865 const char *from;
866 char buf[64];
867 pid_t pid;
868
869 pfd.fd = listen_sk;
870 pfd.events = POLLIN;
871 do {
872 int timeout = 1000;
873
874 if (!flist_empty(&conn_list))
875 timeout = 100;
876
877 ret = poll(&pfd, 1, timeout);
878 if (ret < 0) {
879 if (errno == EINTR)
880 break;
881 log_err("fio: poll: %s\n", strerror(errno));
882 break;
883 } else if (!ret) {
884 fio_server_check_conns(&conn_list);
885 continue;
886 }
887
888 if (pfd.revents & POLLIN)
889 break;
890 } while (!exit_backend);
891
892 fio_server_check_conns(&conn_list);
893
894 if (exit_backend || ret < 0)
895 break;
896
897 if (use_ipv6)
898 sk = accept(listen_sk, (struct sockaddr *) &addr6, &len);
899 else
900 sk = accept(listen_sk, (struct sockaddr *) &addr, &len);
901
902 if (sk < 0) {
903 log_err("fio: accept: %s\n", strerror(errno));
904 return -1;
905 }
906
907 if (use_ipv6)
908 from = inet_ntop(AF_INET6, (struct sockaddr *) &addr6.sin6_addr, buf, sizeof(buf));
909 else
910 from = inet_ntop(AF_INET, (struct sockaddr *) &addr.sin_addr, buf, sizeof(buf));
911
912 dprint(FD_NET, "server: connect from %s\n", from);
913
914 pid = fork();
915 if (pid) {
916 close(sk);
917 fio_server_add_conn_pid(&conn_list, pid);
918 continue;
919 }
920
921 /* exits */
922 handle_connection(sk);
923 }
924
925 return exitval;
926}
927
928int fio_server_text_output(int level, const char *buf, size_t len)
929{
930 struct cmd_text_pdu *pdu;
931 unsigned int tlen;
932 struct timeval tv;
933
934 if (server_fd == -1)
935 return log_local_buf(buf, len);
936
937 tlen = sizeof(*pdu) + len;
938 pdu = malloc(tlen);
939
940 pdu->level = __cpu_to_le32(level);
941 pdu->buf_len = __cpu_to_le32(len);
942
943 gettimeofday(&tv, NULL);
944 pdu->log_sec = __cpu_to_le64(tv.tv_sec);
945 pdu->log_usec = __cpu_to_le64(tv.tv_usec);
946
947 memcpy(pdu->buf, buf, len);
948
949 fio_net_send_cmd(server_fd, FIO_NET_CMD_TEXT, pdu, tlen, NULL, NULL);
950 free(pdu);
951 return len;
952}
953
954static void convert_io_stat(struct io_stat *dst, struct io_stat *src)
955{
956 dst->max_val = cpu_to_le64(src->max_val);
957 dst->min_val = cpu_to_le64(src->min_val);
958 dst->samples = cpu_to_le64(src->samples);
959
960 /*
961 * Encode to IEEE 754 for network transfer
962 */
963 dst->mean.u.i = __cpu_to_le64(fio_double_to_uint64(src->mean.u.f));
964 dst->S.u.i = __cpu_to_le64(fio_double_to_uint64(src->S.u.f));
965}
966
967static void convert_gs(struct group_run_stats *dst, struct group_run_stats *src)
968{
969 int i;
970
971 for (i = 0; i < DDIR_RWDIR_CNT; i++) {
972 dst->max_run[i] = cpu_to_le64(src->max_run[i]);
973 dst->min_run[i] = cpu_to_le64(src->min_run[i]);
974 dst->max_bw[i] = cpu_to_le64(src->max_bw[i]);
975 dst->min_bw[i] = cpu_to_le64(src->min_bw[i]);
976 dst->io_kb[i] = cpu_to_le64(src->io_kb[i]);
977 dst->agg[i] = cpu_to_le64(src->agg[i]);
978 }
979
980 dst->kb_base = cpu_to_le32(src->kb_base);
981 dst->unit_base = cpu_to_le32(src->unit_base);
982 dst->groupid = cpu_to_le32(src->groupid);
983 dst->unified_rw_rep = cpu_to_le32(src->unified_rw_rep);
984}
985
986/*
987 * Send a CMD_TS, which packs struct thread_stat and group_run_stats
988 * into a single payload.
989 */
990void fio_server_send_ts(struct thread_stat *ts, struct group_run_stats *rs)
991{
992 struct cmd_ts_pdu p;
993 int i, j;
994
995 dprint(FD_NET, "server sending end stats\n");
996
997 memset(&p, 0, sizeof(p));
998
999 strncpy(p.ts.name, ts->name, FIO_JOBNAME_SIZE - 1);
1000 strncpy(p.ts.verror, ts->verror, FIO_VERROR_SIZE - 1);
1001 strncpy(p.ts.description, ts->description, FIO_JOBDESC_SIZE - 1);
1002
1003 p.ts.error = cpu_to_le32(ts->error);
1004 p.ts.thread_number = cpu_to_le32(ts->thread_number);
1005 p.ts.groupid = cpu_to_le32(ts->groupid);
1006 p.ts.pid = cpu_to_le32(ts->pid);
1007 p.ts.members = cpu_to_le32(ts->members);
1008 p.ts.unified_rw_rep = cpu_to_le32(ts->unified_rw_rep);
1009
1010 for (i = 0; i < DDIR_RWDIR_CNT; i++) {
1011 convert_io_stat(&p.ts.clat_stat[i], &ts->clat_stat[i]);
1012 convert_io_stat(&p.ts.slat_stat[i], &ts->slat_stat[i]);
1013 convert_io_stat(&p.ts.lat_stat[i], &ts->lat_stat[i]);
1014 convert_io_stat(&p.ts.bw_stat[i], &ts->bw_stat[i]);
1015 }
1016
1017 p.ts.usr_time = cpu_to_le64(ts->usr_time);
1018 p.ts.sys_time = cpu_to_le64(ts->sys_time);
1019 p.ts.ctx = cpu_to_le64(ts->ctx);
1020 p.ts.minf = cpu_to_le64(ts->minf);
1021 p.ts.majf = cpu_to_le64(ts->majf);
1022 p.ts.clat_percentiles = cpu_to_le64(ts->clat_percentiles);
1023
1024 for (i = 0; i < FIO_IO_U_LIST_MAX_LEN; i++) {
1025 fio_fp64_t *src = &ts->percentile_list[i];
1026 fio_fp64_t *dst = &p.ts.percentile_list[i];
1027
1028 dst->u.i = __cpu_to_le64(fio_double_to_uint64(src->u.f));
1029 }
1030
1031 for (i = 0; i < FIO_IO_U_MAP_NR; i++) {
1032 p.ts.io_u_map[i] = cpu_to_le32(ts->io_u_map[i]);
1033 p.ts.io_u_submit[i] = cpu_to_le32(ts->io_u_submit[i]);
1034 p.ts.io_u_complete[i] = cpu_to_le32(ts->io_u_complete[i]);
1035 }
1036
1037 for (i = 0; i < FIO_IO_U_LAT_U_NR; i++) {
1038 p.ts.io_u_lat_u[i] = cpu_to_le32(ts->io_u_lat_u[i]);
1039 p.ts.io_u_lat_m[i] = cpu_to_le32(ts->io_u_lat_m[i]);
1040 }
1041
1042 for (i = 0; i < DDIR_RWDIR_CNT; i++)
1043 for (j = 0; j < FIO_IO_U_PLAT_NR; j++)
1044 p.ts.io_u_plat[i][j] = cpu_to_le32(ts->io_u_plat[i][j]);
1045
1046 for (i = 0; i < DDIR_RWDIR_CNT; i++) {
1047 p.ts.total_io_u[i] = cpu_to_le64(ts->total_io_u[i]);
1048 p.ts.short_io_u[i] = cpu_to_le64(ts->short_io_u[i]);
1049 }
1050
1051 p.ts.total_submit = cpu_to_le64(ts->total_submit);
1052 p.ts.total_complete = cpu_to_le64(ts->total_complete);
1053
1054 for (i = 0; i < DDIR_RWDIR_CNT; i++) {
1055 p.ts.io_bytes[i] = cpu_to_le64(ts->io_bytes[i]);
1056 p.ts.runtime[i] = cpu_to_le64(ts->runtime[i]);
1057 }
1058
1059 p.ts.total_run_time = cpu_to_le64(ts->total_run_time);
1060 p.ts.continue_on_error = cpu_to_le16(ts->continue_on_error);
1061 p.ts.total_err_count = cpu_to_le64(ts->total_err_count);
1062 p.ts.first_error = cpu_to_le32(ts->first_error);
1063 p.ts.kb_base = cpu_to_le32(ts->kb_base);
1064 p.ts.unit_base = cpu_to_le32(ts->unit_base);
1065
1066 p.ts.latency_depth = cpu_to_le32(ts->latency_depth);
1067 p.ts.latency_target = cpu_to_le64(ts->latency_target);
1068 p.ts.latency_window = cpu_to_le64(ts->latency_window);
1069 p.ts.latency_percentile.u.i = __cpu_to_le64(fio_double_to_uint64(ts->latency_percentile.u.f));
1070
1071 convert_gs(&p.rs, rs);
1072
1073 fio_net_send_cmd(server_fd, FIO_NET_CMD_TS, &p, sizeof(p), NULL, NULL);
1074}
1075
1076void fio_server_send_gs(struct group_run_stats *rs)
1077{
1078 struct group_run_stats gs;
1079
1080 dprint(FD_NET, "server sending group run stats\n");
1081
1082 convert_gs(&gs, rs);
1083 fio_net_send_cmd(server_fd, FIO_NET_CMD_GS, &gs, sizeof(gs), NULL, NULL);
1084}
1085
1086static void convert_agg(struct disk_util_agg *dst, struct disk_util_agg *src)
1087{
1088 int i;
1089
1090 for (i = 0; i < 2; i++) {
1091 dst->ios[i] = cpu_to_le32(src->ios[i]);
1092 dst->merges[i] = cpu_to_le32(src->merges[i]);
1093 dst->sectors[i] = cpu_to_le64(src->sectors[i]);
1094 dst->ticks[i] = cpu_to_le32(src->ticks[i]);
1095 }
1096
1097 dst->io_ticks = cpu_to_le32(src->io_ticks);
1098 dst->time_in_queue = cpu_to_le32(src->time_in_queue);
1099 dst->slavecount = cpu_to_le32(src->slavecount);
1100 dst->max_util.u.i = __cpu_to_le64(fio_double_to_uint64(src->max_util.u.f));
1101}
1102
1103static void convert_dus(struct disk_util_stat *dst, struct disk_util_stat *src)
1104{
1105 int i;
1106
1107 dst->name[FIO_DU_NAME_SZ - 1] = '\0';
1108 strncpy((char *) dst->name, (char *) src->name, FIO_DU_NAME_SZ - 1);
1109
1110 for (i = 0; i < 2; i++) {
1111 dst->s.ios[i] = cpu_to_le32(src->s.ios[i]);
1112 dst->s.merges[i] = cpu_to_le32(src->s.merges[i]);
1113 dst->s.sectors[i] = cpu_to_le64(src->s.sectors[i]);
1114 dst->s.ticks[i] = cpu_to_le32(src->s.ticks[i]);
1115 }
1116
1117 dst->s.io_ticks = cpu_to_le32(src->s.io_ticks);
1118 dst->s.time_in_queue = cpu_to_le32(src->s.time_in_queue);
1119 dst->s.msec = cpu_to_le64(src->s.msec);
1120}
1121
1122void fio_server_send_du(void)
1123{
1124 struct disk_util *du;
1125 struct flist_head *entry;
1126 struct cmd_du_pdu pdu;
1127
1128 dprint(FD_NET, "server: sending disk_util %d\n", !flist_empty(&disk_list));
1129
1130 memset(&pdu, 0, sizeof(pdu));
1131
1132 flist_for_each(entry, &disk_list) {
1133 du = flist_entry(entry, struct disk_util, list);
1134
1135 convert_dus(&pdu.dus, &du->dus);
1136 convert_agg(&pdu.agg, &du->agg);
1137
1138 fio_net_send_cmd(server_fd, FIO_NET_CMD_DU, &pdu, sizeof(pdu), NULL, NULL);
1139 }
1140}
1141
1142/*
1143 * Send a command with a separate PDU, not inlined in the command
1144 */
1145static int fio_send_cmd_ext_pdu(int sk, uint16_t opcode, const void *buf,
1146 off_t size, uint64_t tag, uint32_t flags)
1147{
1148 struct fio_net_cmd cmd;
1149 struct iovec iov[2];
1150
1151 iov[0].iov_base = (void *) &cmd;
1152 iov[0].iov_len = sizeof(cmd);
1153 iov[1].iov_base = (void *) buf;
1154 iov[1].iov_len = size;
1155
1156 __fio_init_net_cmd(&cmd, opcode, size, tag);
1157 cmd.flags = __cpu_to_le32(flags);
1158 fio_net_cmd_crc_pdu(&cmd, buf);
1159
1160 return fio_sendv_data(sk, iov, 2);
1161}
1162
1163static int fio_send_iolog_gz(struct cmd_iolog_pdu *pdu, struct io_log *log)
1164{
1165 int ret = 0;
1166#ifdef CONFIG_ZLIB
1167 z_stream stream;
1168 void *out_pdu;
1169
1170 /*
1171 * Dirty - since the log is potentially huge, compress it into
1172 * FIO_SERVER_MAX_FRAGMENT_PDU chunks and let the receiving
1173 * side defragment it.
1174 */
1175 out_pdu = malloc(FIO_SERVER_MAX_FRAGMENT_PDU);
1176
1177 stream.zalloc = Z_NULL;
1178 stream.zfree = Z_NULL;
1179 stream.opaque = Z_NULL;
1180
1181 if (deflateInit(&stream, Z_DEFAULT_COMPRESSION) != Z_OK) {
1182 ret = 1;
1183 goto err;
1184 }
1185
1186 stream.next_in = (void *) log->log;
1187 stream.avail_in = log->nr_samples * sizeof(struct io_sample);
1188
1189 do {
1190 unsigned int this_len, flags = 0;
1191 int ret;
1192
1193 stream.avail_out = FIO_SERVER_MAX_FRAGMENT_PDU;
1194 stream.next_out = out_pdu;
1195 ret = deflate(&stream, Z_FINISH);
1196 /* may be Z_OK, or Z_STREAM_END */
1197 if (ret < 0)
1198 goto err_zlib;
1199
1200 this_len = FIO_SERVER_MAX_FRAGMENT_PDU - stream.avail_out;
1201
1202 if (stream.avail_in)
1203 flags = FIO_NET_CMD_F_MORE;
1204
1205 ret = fio_send_cmd_ext_pdu(server_fd, FIO_NET_CMD_IOLOG,
1206 out_pdu, this_len, 0, flags);
1207 if (ret)
1208 goto err_zlib;
1209 } while (stream.avail_in);
1210
1211err_zlib:
1212 deflateEnd(&stream);
1213err:
1214 free(out_pdu);
1215#endif
1216 return ret;
1217}
1218
1219int fio_send_iolog(struct thread_data *td, struct io_log *log, const char *name)
1220{
1221 struct cmd_iolog_pdu pdu;
1222 int i, ret = 0;
1223
1224 pdu.thread_number = cpu_to_le32(td->thread_number);
1225 pdu.nr_samples = __cpu_to_le32(log->nr_samples);
1226 pdu.log_type = cpu_to_le32(log->log_type);
1227 pdu.compressed = cpu_to_le32(use_zlib);
1228 strcpy((char *) pdu.name, name);
1229
1230 for (i = 0; i < log->nr_samples; i++) {
1231 struct io_sample *s = &log->log[i];
1232
1233 s->time = cpu_to_le64(s->time);
1234 s->val = cpu_to_le64(s->val);
1235 s->ddir = cpu_to_le32(s->ddir);
1236 s->bs = cpu_to_le32(s->bs);
1237 }
1238
1239 /*
1240 * Send header first, it's not compressed.
1241 */
1242 ret = fio_send_cmd_ext_pdu(server_fd, FIO_NET_CMD_IOLOG, &pdu,
1243 sizeof(pdu), 0, FIO_NET_CMD_F_MORE);
1244 if (ret)
1245 return ret;
1246
1247 /*
1248 * Now send actual log, compress if we can, otherwise just plain
1249 */
1250 if (use_zlib)
1251 return fio_send_iolog_gz(&pdu, log);
1252
1253 return fio_send_cmd_ext_pdu(server_fd, FIO_NET_CMD_IOLOG, log->log,
1254 log->nr_samples * sizeof(struct io_sample), 0, 0);
1255}
1256
1257void fio_server_send_add_job(struct thread_data *td)
1258{
1259 struct cmd_add_job_pdu pdu;
1260
1261 memset(&pdu, 0, sizeof(pdu));
1262 pdu.thread_number = cpu_to_le32(td->thread_number);
1263 pdu.groupid = cpu_to_le32(td->groupid);
1264 convert_thread_options_to_net(&pdu.top, &td->o);
1265
1266 fio_net_send_cmd(server_fd, FIO_NET_CMD_ADD_JOB, &pdu, sizeof(pdu), NULL, NULL);
1267}
1268
1269void fio_server_send_start(struct thread_data *td)
1270{
1271 assert(server_fd != -1);
1272
1273 fio_net_send_simple_cmd(server_fd, FIO_NET_CMD_SERVER_START, 0, NULL);
1274}
1275
1276static int fio_init_server_ip(void)
1277{
1278 struct sockaddr *addr;
1279 socklen_t socklen;
1280 char buf[80];
1281 const char *str;
1282 int sk, opt;
1283
1284 if (use_ipv6)
1285 sk = socket(AF_INET6, SOCK_STREAM, 0);
1286 else
1287 sk = socket(AF_INET, SOCK_STREAM, 0);
1288
1289 if (sk < 0) {
1290 log_err("fio: socket: %s\n", strerror(errno));
1291 return -1;
1292 }
1293
1294 opt = 1;
1295 if (setsockopt(sk, SOL_SOCKET, SO_REUSEADDR, (void *)&opt, sizeof(opt)) < 0) {
1296 log_err("fio: setsockopt: %s\n", strerror(errno));
1297 close(sk);
1298 return -1;
1299 }
1300#ifdef SO_REUSEPORT
1301 if (setsockopt(sk, SOL_SOCKET, SO_REUSEPORT, &opt, sizeof(opt)) < 0) {
1302 log_err("fio: setsockopt: %s\n", strerror(errno));
1303 close(sk);
1304 return -1;
1305 }
1306#endif
1307
1308 if (use_ipv6) {
1309 const void *src = &saddr_in6.sin6_addr;
1310
1311 addr = (struct sockaddr *) &saddr_in6;
1312 socklen = sizeof(saddr_in6);
1313 saddr_in6.sin6_family = AF_INET6;
1314 str = inet_ntop(AF_INET6, src, buf, sizeof(buf));
1315 } else {
1316 const void *src = &saddr_in.sin_addr;
1317
1318 addr = (struct sockaddr *) &saddr_in;
1319 socklen = sizeof(saddr_in);
1320 saddr_in.sin_family = AF_INET;
1321 str = inet_ntop(AF_INET, src, buf, sizeof(buf));
1322 }
1323
1324 if (bind(sk, addr, socklen) < 0) {
1325 log_err("fio: bind: %s\n", strerror(errno));
1326 log_info("fio: failed with IPv%c %s\n", use_ipv6 ? '6' : '4', str);
1327 close(sk);
1328 return -1;
1329 }
1330
1331 return sk;
1332}
1333
1334static int fio_init_server_sock(void)
1335{
1336 struct sockaddr_un addr;
1337 socklen_t len;
1338 mode_t mode;
1339 int sk;
1340
1341 sk = socket(AF_UNIX, SOCK_STREAM, 0);
1342 if (sk < 0) {
1343 log_err("fio: socket: %s\n", strerror(errno));
1344 return -1;
1345 }
1346
1347 mode = umask(000);
1348
1349 memset(&addr, 0, sizeof(addr));
1350 addr.sun_family = AF_UNIX;
1351 strncpy(addr.sun_path, bind_sock, sizeof(addr.sun_path) - 1);
1352
1353 len = sizeof(addr.sun_family) + strlen(bind_sock) + 1;
1354
1355 if (bind(sk, (struct sockaddr *) &addr, len) < 0) {
1356 log_err("fio: bind: %s\n", strerror(errno));
1357 close(sk);
1358 return -1;
1359 }
1360
1361 umask(mode);
1362 return sk;
1363}
1364
1365static int fio_init_server_connection(void)
1366{
1367 char bind_str[128];
1368 int sk;
1369
1370 dprint(FD_NET, "starting server\n");
1371
1372 if (!bind_sock)
1373 sk = fio_init_server_ip();
1374 else
1375 sk = fio_init_server_sock();
1376
1377 if (sk < 0)
1378 return sk;
1379
1380 memset(bind_str, 0, sizeof(bind_str));
1381
1382 if (!bind_sock) {
1383 char *p, port[16];
1384 const void *src;
1385 int af;
1386
1387 if (use_ipv6) {
1388 af = AF_INET6;
1389 src = &saddr_in6.sin6_addr;
1390 } else {
1391 af = AF_INET;
1392 src = &saddr_in.sin_addr;
1393 }
1394
1395 p = (char *) inet_ntop(af, src, bind_str, sizeof(bind_str));
1396
1397 sprintf(port, ",%u", fio_net_port);
1398 if (p)
1399 strcat(p, port);
1400 else
1401 strncpy(bind_str, port, sizeof(bind_str) - 1);
1402 } else
1403 strncpy(bind_str, bind_sock, sizeof(bind_str) - 1);
1404
1405 log_info("fio: server listening on %s\n", bind_str);
1406
1407 if (listen(sk, 0) < 0) {
1408 log_err("fio: listen: %s\n", strerror(errno));
1409 close(sk);
1410 return -1;
1411 }
1412
1413 return sk;
1414}
1415
1416int fio_server_parse_host(const char *host, int ipv6, struct in_addr *inp,
1417 struct in6_addr *inp6)
1418
1419{
1420 int ret = 0;
1421
1422 if (ipv6)
1423 ret = inet_pton(AF_INET6, host, inp6);
1424 else
1425 ret = inet_pton(AF_INET, host, inp);
1426
1427 if (ret != 1) {
1428 struct addrinfo hints, *res;
1429
1430 memset(&hints, 0, sizeof(hints));
1431 hints.ai_family = ipv6 ? AF_INET6 : AF_INET;
1432 hints.ai_socktype = SOCK_STREAM;
1433
1434 ret = getaddrinfo(host, NULL, &hints, &res);
1435 if (ret) {
1436 log_err("fio: failed to resolve <%s> (%s)\n", host,
1437 gai_strerror(ret));
1438 return 1;
1439 }
1440
1441 if (ipv6)
1442 memcpy(inp6, &((struct sockaddr_in6 *) res->ai_addr)->sin6_addr, sizeof(*inp6));
1443 else
1444 memcpy(inp, &((struct sockaddr_in *) res->ai_addr)->sin_addr, sizeof(*inp));
1445
1446 ret = 1;
1447 freeaddrinfo(res);
1448 }
1449
1450 return !(ret == 1);
1451}
1452
1453/*
1454 * Parse a host/ip/port string. Reads from 'str'.
1455 *
1456 * Outputs:
1457 *
1458 * For IPv4:
1459 * *ptr is the host, *port is the port, inp is the destination.
1460 * For IPv6:
1461 * *ptr is the host, *port is the port, inp6 is the dest, and *ipv6 is 1.
1462 * For local domain sockets:
1463 * *ptr is the filename, *is_sock is 1.
1464 */
1465int fio_server_parse_string(const char *str, char **ptr, int *is_sock,
1466 int *port, struct in_addr *inp,
1467 struct in6_addr *inp6, int *ipv6)
1468{
1469 const char *host = str;
1470 char *portp;
1471 int lport = 0;
1472
1473 *ptr = NULL;
1474 *is_sock = 0;
1475 *port = fio_net_port;
1476 *ipv6 = 0;
1477
1478 if (!strncmp(str, "sock:", 5)) {
1479 *ptr = strdup(str + 5);
1480 *is_sock = 1;
1481
1482 return 0;
1483 }
1484
1485 /*
1486 * Is it ip:<ip or host>:port
1487 */
1488 if (!strncmp(host, "ip:", 3))
1489 host += 3;
1490 else if (!strncmp(host, "ip4:", 4))
1491 host += 4;
1492 else if (!strncmp(host, "ip6:", 4)) {
1493 host += 4;
1494 *ipv6 = 1;
1495 } else if (host[0] == ':') {
1496 /* String is :port */
1497 host++;
1498 lport = atoi(host);
1499 if (!lport || lport > 65535) {
1500 log_err("fio: bad server port %u\n", lport);
1501 return 1;
1502 }
1503 /* no hostname given, we are done */
1504 *port = lport;
1505 return 0;
1506 }
1507
1508 /*
1509 * If no port seen yet, check if there's a last ',' at the end
1510 */
1511 if (!lport) {
1512 portp = strchr(host, ',');
1513 if (portp) {
1514 *portp = '\0';
1515 portp++;
1516 lport = atoi(portp);
1517 if (!lport || lport > 65535) {
1518 log_err("fio: bad server port %u\n", lport);
1519 return 1;
1520 }
1521 }
1522 }
1523
1524 if (lport)
1525 *port = lport;
1526
1527 if (!strlen(host))
1528 return 0;
1529
1530 *ptr = strdup(host);
1531
1532 if (fio_server_parse_host(*ptr, *ipv6, inp, inp6)) {
1533 free(*ptr);
1534 *ptr = NULL;
1535 return 1;
1536 }
1537
1538 if (*port == 0)
1539 *port = fio_net_port;
1540
1541 return 0;
1542}
1543
1544/*
1545 * Server arg should be one of:
1546 *
1547 * sock:/path/to/socket
1548 * ip:1.2.3.4
1549 * 1.2.3.4
1550 *
1551 * Where sock uses unix domain sockets, and ip binds the server to
1552 * a specific interface. If no arguments are given to the server, it
1553 * uses IP and binds to 0.0.0.0.
1554 *
1555 */
1556static int fio_handle_server_arg(void)
1557{
1558 int port = fio_net_port;
1559 int is_sock, ret = 0;
1560
1561 saddr_in.sin_addr.s_addr = htonl(INADDR_ANY);
1562
1563 if (!fio_server_arg)
1564 goto out;
1565
1566 ret = fio_server_parse_string(fio_server_arg, &bind_sock, &is_sock,
1567 &port, &saddr_in.sin_addr,
1568 &saddr_in6.sin6_addr, &use_ipv6);
1569
1570 if (!is_sock && bind_sock) {
1571 free(bind_sock);
1572 bind_sock = NULL;
1573 }
1574
1575out:
1576 fio_net_port = port;
1577 saddr_in.sin_port = htons(port);
1578 saddr_in6.sin6_port = htons(port);
1579 return ret;
1580}
1581
1582static void sig_int(int sig)
1583{
1584 if (bind_sock)
1585 unlink(bind_sock);
1586}
1587
1588static void set_sig_handlers(void)
1589{
1590 struct sigaction act;
1591
1592 memset(&act, 0, sizeof(act));
1593 act.sa_handler = sig_int;
1594 act.sa_flags = SA_RESTART;
1595 sigaction(SIGINT, &act, NULL);
1596}
1597
1598static int fio_server(void)
1599{
1600 int sk, ret;
1601
1602 dprint(FD_NET, "starting server\n");
1603
1604 if (fio_handle_server_arg())
1605 return -1;
1606
1607 sk = fio_init_server_connection();
1608 if (sk < 0)
1609 return -1;
1610
1611 set_sig_handlers();
1612
1613 ret = accept_loop(sk);
1614
1615 close(sk);
1616
1617 if (fio_server_arg) {
1618 free(fio_server_arg);
1619 fio_server_arg = NULL;
1620 }
1621 if (bind_sock)
1622 free(bind_sock);
1623
1624 return ret;
1625}
1626
1627void fio_server_got_signal(int signal)
1628{
1629 if (signal == SIGPIPE)
1630 server_fd = -1;
1631 else {
1632 log_info("\nfio: terminating on signal %d\n", signal);
1633 exit_backend = 1;
1634 }
1635}
1636
1637static int check_existing_pidfile(const char *pidfile)
1638{
1639 struct stat sb;
1640 char buf[16];
1641 pid_t pid;
1642 FILE *f;
1643
1644 if (stat(pidfile, &sb))
1645 return 0;
1646
1647 f = fopen(pidfile, "r");
1648 if (!f)
1649 return 0;
1650
1651 if (fread(buf, sb.st_size, 1, f) <= 0) {
1652 fclose(f);
1653 return 1;
1654 }
1655 fclose(f);
1656
1657 pid = atoi(buf);
1658 if (kill(pid, SIGCONT) < 0)
1659 return errno != ESRCH;
1660
1661 return 1;
1662}
1663
1664static int write_pid(pid_t pid, const char *pidfile)
1665{
1666 FILE *fpid;
1667
1668 fpid = fopen(pidfile, "w");
1669 if (!fpid) {
1670 log_err("fio: failed opening pid file %s\n", pidfile);
1671 return 1;
1672 }
1673
1674 fprintf(fpid, "%u\n", (unsigned int) pid);
1675 fclose(fpid);
1676 return 0;
1677}
1678
1679/*
1680 * If pidfile is specified, background us.
1681 */
1682int fio_start_server(char *pidfile)
1683{
1684 pid_t pid;
1685 int ret;
1686
1687#if defined(WIN32)
1688 WSADATA wsd;
1689 WSAStartup(MAKEWORD(2, 2), &wsd);
1690#endif
1691
1692 if (!pidfile)
1693 return fio_server();
1694
1695 if (check_existing_pidfile(pidfile)) {
1696 log_err("fio: pidfile %s exists and server appears alive\n",
1697 pidfile);
1698 free(pidfile);
1699 return -1;
1700 }
1701
1702 pid = fork();
1703 if (pid < 0) {
1704 log_err("fio: failed server fork: %s", strerror(errno));
1705 free(pidfile);
1706 return -1;
1707 } else if (pid) {
1708 int ret = write_pid(pid, pidfile);
1709
1710 free(pidfile);
1711 exit(ret);
1712 }
1713
1714 setsid();
1715 openlog("fio", LOG_NDELAY|LOG_NOWAIT|LOG_PID, LOG_USER);
1716 log_syslog = 1;
1717 close(STDIN_FILENO);
1718 close(STDOUT_FILENO);
1719 close(STDERR_FILENO);
1720 f_out = NULL;
1721 f_err = NULL;
1722
1723 ret = fio_server();
1724
1725 closelog();
1726 unlink(pidfile);
1727 free(pidfile);
1728 return ret;
1729}
1730
1731void fio_server_set_arg(const char *arg)
1732{
1733 fio_server_arg = strdup(arg);
1734}
fio - Flexible IO Tester