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server: fix potential buffer overrun in bind string
[fio.git] / server.c
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1#include <stdio.h>
2#include <stdlib.h>
3#include <stdarg.h>
4#include <unistd.h>
5#include <limits.h>
6#include <errno.h>
7#include <fcntl.h>
8#include <sys/poll.h>
9#include <sys/types.h>
10#include <sys/wait.h>
11#include <sys/socket.h>
12#include <sys/stat.h>
13#include <sys/un.h>
14#include <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
54static const char *fio_server_ops[FIO_NET_CMD_NR] = {
55 "",
56 "QUIT",
57 "EXIT",
58 "JOB",
59 "JOBLINE",
60 "TEXT",
61 "TS",
62 "GS",
63 "SEND_ETA",
64 "ETA",
65 "PROBE",
66 "START",
67 "STOP",
68 "DISK_UTIL",
69 "SERVER_START",
70 "ADD_JOB",
71 "CMD_RUN"
72 "CMD_IOLOG",
73};
74
75const char *fio_server_op(unsigned int op)
76{
77 static char buf[32];
78
79 if (op < FIO_NET_CMD_NR)
80 return fio_server_ops[op];
81
82 sprintf(buf, "UNKNOWN/%d", op);
83 return buf;
84}
85
86static ssize_t iov_total_len(const struct iovec *iov, int count)
87{
88 ssize_t ret = 0;
89
90 while (count--) {
91 ret += iov->iov_len;
92 iov++;
93 }
94
95 return ret;
96}
97
98static int fio_sendv_data(int sk, struct iovec *iov, int count)
99{
100 ssize_t total_len = iov_total_len(iov, count);
101 ssize_t ret;
102
103 do {
104 ret = writev(sk, iov, count);
105 if (ret > 0) {
106 total_len -= ret;
107 if (!total_len)
108 break;
109
110 while (ret) {
111 if (ret >= iov->iov_len) {
112 ret -= iov->iov_len;
113 iov++;
114 continue;
115 }
116 iov->iov_base += ret;
117 iov->iov_len -= ret;
118 ret = 0;
119 }
120 } else if (!ret)
121 break;
122 else if (errno == EAGAIN || errno == EINTR)
123 continue;
124 else
125 break;
126 } while (!exit_backend);
127
128 if (!total_len)
129 return 0;
130
131 if (errno)
132 return -errno;
133
134 return 1;
135}
136
137int fio_send_data(int sk, const void *p, unsigned int len)
138{
139 struct iovec iov = { .iov_base = (void *) p, .iov_len = len };
140
141 assert(len <= sizeof(struct fio_net_cmd) + FIO_SERVER_MAX_FRAGMENT_PDU);
142
143 return fio_sendv_data(sk, &iov, 1);
144}
145
146int fio_recv_data(int sk, void *p, unsigned int len)
147{
148 do {
149 int ret = recv(sk, p, len, MSG_WAITALL);
150
151 if (ret > 0) {
152 len -= ret;
153 if (!len)
154 break;
155 p += ret;
156 continue;
157 } else if (!ret)
158 break;
159 else if (errno == EAGAIN || errno == EINTR)
160 continue;
161 else
162 break;
163 } while (!exit_backend);
164
165 if (!len)
166 return 0;
167
168 return -1;
169}
170
171static int verify_convert_cmd(struct fio_net_cmd *cmd)
172{
173 uint16_t crc;
174
175 cmd->cmd_crc16 = le16_to_cpu(cmd->cmd_crc16);
176 cmd->pdu_crc16 = le16_to_cpu(cmd->pdu_crc16);
177
178 crc = fio_crc16(cmd, FIO_NET_CMD_CRC_SZ);
179 if (crc != cmd->cmd_crc16) {
180 log_err("fio: server bad crc on command (got %x, wanted %x)\n",
181 cmd->cmd_crc16, crc);
182 return 1;
183 }
184
185 cmd->version = le16_to_cpu(cmd->version);
186 cmd->opcode = le16_to_cpu(cmd->opcode);
187 cmd->flags = le32_to_cpu(cmd->flags);
188 cmd->tag = le64_to_cpu(cmd->tag);
189 cmd->pdu_len = le32_to_cpu(cmd->pdu_len);
190
191 switch (cmd->version) {
192 case FIO_SERVER_VER:
193 break;
194 default:
195 log_err("fio: bad server cmd version %d\n", cmd->version);
196 return 1;
197 }
198
199 if (cmd->pdu_len > FIO_SERVER_MAX_FRAGMENT_PDU) {
200 log_err("fio: command payload too large: %u\n", cmd->pdu_len);
201 return 1;
202 }
203
204 return 0;
205}
206
207/*
208 * Read (and defragment, if necessary) incoming commands
209 */
210struct fio_net_cmd *fio_net_recv_cmd(int sk)
211{
212 struct fio_net_cmd cmd, *cmdret = NULL;
213 size_t cmd_size = 0, pdu_offset = 0;
214 uint16_t crc;
215 int ret, first = 1;
216 void *pdu = NULL;
217
218 do {
219 ret = fio_recv_data(sk, &cmd, sizeof(cmd));
220 if (ret)
221 break;
222
223 /* We have a command, verify it and swap if need be */
224 ret = verify_convert_cmd(&cmd);
225 if (ret)
226 break;
227
228 if (first) {
229 /* if this is text, add room for \0 at the end */
230 cmd_size = sizeof(cmd) + cmd.pdu_len + 1;
231 assert(!cmdret);
232 } else
233 cmd_size += cmd.pdu_len;
234
235 cmdret = realloc(cmdret, cmd_size);
236
237 if (first)
238 memcpy(cmdret, &cmd, sizeof(cmd));
239 else if (cmdret->opcode != cmd.opcode) {
240 log_err("fio: fragment opcode mismatch (%d != %d)\n",
241 cmdret->opcode, cmd.opcode);
242 ret = 1;
243 break;
244 }
245
246 if (!cmd.pdu_len)
247 break;
248
249 /* There's payload, get it */
250 pdu = (void *) cmdret->payload + pdu_offset;
251 ret = fio_recv_data(sk, pdu, cmd.pdu_len);
252 if (ret)
253 break;
254
255 /* Verify payload crc */
256 crc = fio_crc16(pdu, cmd.pdu_len);
257 if (crc != cmd.pdu_crc16) {
258 log_err("fio: server bad crc on payload ");
259 log_err("(got %x, wanted %x)\n", cmd.pdu_crc16, crc);
260 ret = 1;
261 break;
262 }
263
264 pdu_offset += cmd.pdu_len;
265 if (!first)
266 cmdret->pdu_len += cmd.pdu_len;
267 first = 0;
268 } while (cmd.flags & FIO_NET_CMD_F_MORE);
269
270 if (ret) {
271 free(cmdret);
272 cmdret = NULL;
273 } else if (cmdret) {
274 /* zero-terminate text input */
275 if (cmdret->pdu_len) {
276 if (cmdret->opcode == FIO_NET_CMD_TEXT) {
277 struct cmd_text_pdu *pdu = (struct cmd_text_pdu *) cmdret->payload;
278 char *buf = (char *) pdu->buf;
279
280 buf[pdu->buf_len] = '\0';
281 } else if (cmdret->opcode == FIO_NET_CMD_JOB) {
282 struct cmd_job_pdu *pdu = (struct cmd_job_pdu *) cmdret->payload;
283 char *buf = (char *) pdu->buf;
284 int len = le32_to_cpu(pdu->buf_len);
285
286 buf[len] = '\0';
287 }
288 }
289
290 /* frag flag is internal */
291 cmdret->flags &= ~FIO_NET_CMD_F_MORE;
292 }
293
294 return cmdret;
295}
296
297static void add_reply(uint64_t tag, struct flist_head *list)
298{
299 struct fio_net_cmd_reply *reply;
300
301 reply = (struct fio_net_cmd_reply *) (uintptr_t) tag;
302 flist_add_tail(&reply->list, list);
303}
304
305static uint64_t alloc_reply(uint64_t tag, uint16_t opcode)
306{
307 struct fio_net_cmd_reply *reply;
308
309 reply = calloc(1, sizeof(*reply));
310 INIT_FLIST_HEAD(&reply->list);
311 gettimeofday(&reply->tv, NULL);
312 reply->saved_tag = tag;
313 reply->opcode = opcode;
314
315 return (uintptr_t) reply;
316}
317
318static void free_reply(uint64_t tag)
319{
320 struct fio_net_cmd_reply *reply;
321
322 reply = (struct fio_net_cmd_reply *) (uintptr_t) tag;
323 free(reply);
324}
325
326void fio_net_cmd_crc_pdu(struct fio_net_cmd *cmd, const void *pdu)
327{
328 uint32_t pdu_len;
329
330 cmd->cmd_crc16 = __cpu_to_le16(fio_crc16(cmd, FIO_NET_CMD_CRC_SZ));
331
332 pdu_len = le32_to_cpu(cmd->pdu_len);
333 cmd->pdu_crc16 = __cpu_to_le16(fio_crc16(pdu, pdu_len));
334}
335
336void fio_net_cmd_crc(struct fio_net_cmd *cmd)
337{
338 fio_net_cmd_crc_pdu(cmd, cmd->payload);
339}
340
341int fio_net_send_cmd(int fd, uint16_t opcode, const void *buf, off_t size,
342 uint64_t *tagptr, struct flist_head *list)
343{
344 struct fio_net_cmd *cmd = NULL;
345 size_t this_len, cur_len = 0;
346 uint64_t tag;
347 int ret;
348
349 if (list) {
350 assert(tagptr);
351 tag = *tagptr = alloc_reply(*tagptr, opcode);
352 } else
353 tag = tagptr ? *tagptr : 0;
354
355 do {
356 this_len = size;
357 if (this_len > FIO_SERVER_MAX_FRAGMENT_PDU)
358 this_len = FIO_SERVER_MAX_FRAGMENT_PDU;
359
360 if (!cmd || cur_len < sizeof(*cmd) + this_len) {
361 if (cmd)
362 free(cmd);
363
364 cur_len = sizeof(*cmd) + this_len;
365 cmd = malloc(cur_len);
366 }
367
368 fio_init_net_cmd(cmd, opcode, buf, this_len, tag);
369
370 if (this_len < size)
371 cmd->flags = __cpu_to_le32(FIO_NET_CMD_F_MORE);
372
373 fio_net_cmd_crc(cmd);
374
375 ret = fio_send_data(fd, cmd, sizeof(*cmd) + this_len);
376 size -= this_len;
377 buf += this_len;
378 } while (!ret && size);
379
380 if (list) {
381 if (ret)
382 free_reply(tag);
383 else
384 add_reply(tag, list);
385 }
386
387 if (cmd)
388 free(cmd);
389
390 return ret;
391}
392
393static int fio_net_send_simple_stack_cmd(int sk, uint16_t opcode, uint64_t tag)
394{
395 struct fio_net_cmd cmd;
396
397 fio_init_net_cmd(&cmd, opcode, NULL, 0, tag);
398 fio_net_cmd_crc(&cmd);
399
400 return fio_send_data(sk, &cmd, sizeof(cmd));
401}
402
403/*
404 * If 'list' is non-NULL, then allocate and store the sent command for
405 * later verification.
406 */
407int fio_net_send_simple_cmd(int sk, uint16_t opcode, uint64_t tag,
408 struct flist_head *list)
409{
410 int ret;
411
412 if (list)
413 tag = alloc_reply(tag, opcode);
414
415 ret = fio_net_send_simple_stack_cmd(sk, opcode, tag);
416 if (ret) {
417 if (list)
418 free_reply(tag);
419
420 return ret;
421 }
422
423 if (list)
424 add_reply(tag, list);
425
426 return 0;
427}
428
429int fio_net_send_quit(int sk)
430{
431 dprint(FD_NET, "server: sending quit\n");
432
433 return fio_net_send_simple_cmd(sk, FIO_NET_CMD_QUIT, 0, NULL);
434}
435
436static int fio_net_send_ack(int sk, struct fio_net_cmd *cmd, int error,
437 int signal)
438{
439 struct cmd_end_pdu epdu;
440 uint64_t tag = 0;
441
442 if (cmd)
443 tag = cmd->tag;
444
445 epdu.error = __cpu_to_le32(error);
446 epdu.signal = __cpu_to_le32(signal);
447 return fio_net_send_cmd(sk, FIO_NET_CMD_STOP, &epdu, sizeof(epdu), &tag, NULL);
448}
449
450int fio_net_send_stop(int sk, int error, int signal)
451{
452 dprint(FD_NET, "server: sending stop (%d, %d)\n", error, signal);
453 return fio_net_send_ack(sk, NULL, error, signal);
454}
455
456static void fio_server_add_fork_item(pid_t pid, struct flist_head *list)
457{
458 struct fio_fork_item *ffi;
459
460 ffi = malloc(sizeof(*ffi));
461 ffi->exitval = 0;
462 ffi->signal = 0;
463 ffi->exited = 0;
464 ffi->pid = pid;
465 flist_add_tail(&ffi->list, list);
466}
467
468static void fio_server_add_conn_pid(struct flist_head *conn_list, pid_t pid)
469{
470 dprint(FD_NET, "server: forked off connection job (pid=%u)\n", (int) pid);
471 fio_server_add_fork_item(pid, conn_list);
472}
473
474static void fio_server_add_job_pid(struct flist_head *job_list, pid_t pid)
475{
476 dprint(FD_NET, "server: forked off job job (pid=%u)\n", (int) pid);
477 fio_server_add_fork_item(pid, job_list);
478}
479
480static void fio_server_check_fork_item(struct fio_fork_item *ffi)
481{
482 int ret, status;
483
484 ret = waitpid(ffi->pid, &status, WNOHANG);
485 if (ret < 0) {
486 if (errno == ECHILD) {
487 log_err("fio: connection pid %u disappeared\n", (int) ffi->pid);
488 ffi->exited = 1;
489 } else
490 log_err("fio: waitpid: %s\n", strerror(errno));
491 } else if (ret == ffi->pid) {
492 if (WIFSIGNALED(status)) {
493 ffi->signal = WTERMSIG(status);
494 ffi->exited = 1;
495 }
496 if (WIFEXITED(status)) {
497 if (WEXITSTATUS(status))
498 ffi->exitval = WEXITSTATUS(status);
499 ffi->exited = 1;
500 }
501 }
502}
503
504static void fio_server_fork_item_done(struct fio_fork_item *ffi)
505{
506 dprint(FD_NET, "pid %u exited, sig=%u, exitval=%d\n", (int) ffi->pid, ffi->signal, ffi->exitval);
507
508 /*
509 * Fold STOP and QUIT...
510 */
511 fio_net_send_stop(server_fd, ffi->exitval, ffi->signal);
512 fio_net_send_quit(server_fd);
513 flist_del(&ffi->list);
514 free(ffi);
515}
516
517static void fio_server_check_fork_items(struct flist_head *list)
518{
519 struct flist_head *entry, *tmp;
520 struct fio_fork_item *ffi;
521
522 flist_for_each_safe(entry, tmp, list) {
523 ffi = flist_entry(entry, struct fio_fork_item, list);
524
525 fio_server_check_fork_item(ffi);
526
527 if (ffi->exited)
528 fio_server_fork_item_done(ffi);
529 }
530}
531
532static void fio_server_check_jobs(struct flist_head *job_list)
533{
534 fio_server_check_fork_items(job_list);
535}
536
537static void fio_server_check_conns(struct flist_head *conn_list)
538{
539 fio_server_check_fork_items(conn_list);
540}
541
542static int handle_run_cmd(struct flist_head *job_list, struct fio_net_cmd *cmd)
543{
544 pid_t pid;
545 int ret;
546
547 set_genesis_time();
548
549 pid = fork();
550 if (pid) {
551 fio_server_add_job_pid(job_list, pid);
552 return 0;
553 }
554
555 ret = fio_backend();
556 free_threads_shm();
557 _exit(ret);
558}
559
560static int handle_job_cmd(struct fio_net_cmd *cmd)
561{
562 struct cmd_job_pdu *pdu = (struct cmd_job_pdu *) cmd->payload;
563 void *buf = pdu->buf;
564 struct cmd_start_pdu spdu;
565
566 pdu->buf_len = le32_to_cpu(pdu->buf_len);
567 pdu->client_type = le32_to_cpu(pdu->client_type);
568
569 if (parse_jobs_ini(buf, 1, 0, pdu->client_type)) {
570 fio_net_send_quit(server_fd);
571 return -1;
572 }
573
574 spdu.jobs = cpu_to_le32(thread_number);
575 spdu.stat_outputs = cpu_to_le32(stat_number);
576 fio_net_send_cmd(server_fd, FIO_NET_CMD_START, &spdu, sizeof(spdu), NULL, NULL);
577 return 0;
578}
579
580static int handle_jobline_cmd(struct fio_net_cmd *cmd)
581{
582 void *pdu = cmd->payload;
583 struct cmd_single_line_pdu *cslp;
584 struct cmd_line_pdu *clp;
585 unsigned long offset;
586 struct cmd_start_pdu spdu;
587 char **argv;
588 int i;
589
590 clp = pdu;
591 clp->lines = le16_to_cpu(clp->lines);
592 clp->client_type = le16_to_cpu(clp->client_type);
593 argv = malloc(clp->lines * sizeof(char *));
594 offset = sizeof(*clp);
595
596 dprint(FD_NET, "server: %d command line args\n", clp->lines);
597
598 for (i = 0; i < clp->lines; i++) {
599 cslp = pdu + offset;
600 argv[i] = (char *) cslp->text;
601
602 offset += sizeof(*cslp) + le16_to_cpu(cslp->len);
603 dprint(FD_NET, "server: %d: %s\n", i, argv[i]);
604 }
605
606 if (parse_cmd_line(clp->lines, argv, clp->client_type)) {
607 fio_net_send_quit(server_fd);
608 free(argv);
609 return -1;
610 }
611
612 free(argv);
613
614 spdu.jobs = cpu_to_le32(thread_number);
615 spdu.stat_outputs = cpu_to_le32(stat_number);
616 fio_net_send_cmd(server_fd, FIO_NET_CMD_START, &spdu, sizeof(spdu), NULL, NULL);
617 return 0;
618}
619
620static int handle_probe_cmd(struct fio_net_cmd *cmd)
621{
622 struct cmd_client_probe_pdu *pdu = (struct cmd_client_probe_pdu *) cmd->payload;
623 struct cmd_probe_reply_pdu probe;
624 uint64_t tag = cmd->tag;
625
626 dprint(FD_NET, "server: sending probe reply\n");
627
628 memset(&probe, 0, sizeof(probe));
629 gethostname((char *) probe.hostname, sizeof(probe.hostname));
630#ifdef CONFIG_BIG_ENDIAN
631 probe.bigendian = 1;
632#endif
633 strncpy((char *) probe.fio_version, fio_version_string, sizeof(probe.fio_version));
634
635 probe.os = FIO_OS;
636 probe.arch = FIO_ARCH;
637 probe.bpp = sizeof(void *);
638 probe.cpus = __cpu_to_le32(cpus_online());
639
640 /*
641 * If the client supports compression and we do too, then enable it
642 */
643 if (has_zlib && le64_to_cpu(pdu->flags) & FIO_PROBE_FLAG_ZLIB) {
644 probe.flags = __cpu_to_le64(FIO_PROBE_FLAG_ZLIB);
645 use_zlib = 1;
646 } else {
647 probe.flags = 0;
648 use_zlib = 0;
649 }
650
651 return fio_net_send_cmd(server_fd, FIO_NET_CMD_PROBE, &probe, sizeof(probe), &tag, NULL);
652}
653
654static int handle_send_eta_cmd(struct fio_net_cmd *cmd)
655{
656 struct jobs_eta *je;
657 size_t size;
658 uint64_t tag = cmd->tag;
659 int i;
660
661 if (!thread_number)
662 return 0;
663
664 size = sizeof(*je) + thread_number * sizeof(char) + 1;
665 je = malloc(size);
666 memset(je, 0, size);
667
668 if (!calc_thread_status(je, 1)) {
669 free(je);
670 return 0;
671 }
672
673 dprint(FD_NET, "server sending status\n");
674
675 je->nr_running = cpu_to_le32(je->nr_running);
676 je->nr_ramp = cpu_to_le32(je->nr_ramp);
677 je->nr_pending = cpu_to_le32(je->nr_pending);
678 je->nr_setting_up = cpu_to_le32(je->nr_setting_up);
679 je->files_open = cpu_to_le32(je->files_open);
680
681 for (i = 0; i < DDIR_RWDIR_CNT; i++) {
682 je->m_rate[i] = cpu_to_le32(je->m_rate[i]);
683 je->t_rate[i] = cpu_to_le32(je->t_rate[i]);
684 je->m_iops[i] = cpu_to_le32(je->m_iops[i]);
685 je->t_iops[i] = cpu_to_le32(je->t_iops[i]);
686 je->rate[i] = cpu_to_le32(je->rate[i]);
687 je->iops[i] = cpu_to_le32(je->iops[i]);
688 }
689
690 je->elapsed_sec = cpu_to_le64(je->elapsed_sec);
691 je->eta_sec = cpu_to_le64(je->eta_sec);
692 je->nr_threads = cpu_to_le32(je->nr_threads);
693 je->is_pow2 = cpu_to_le32(je->is_pow2);
694 je->unit_base = cpu_to_le32(je->unit_base);
695
696 fio_net_send_cmd(server_fd, FIO_NET_CMD_ETA, je, size, &tag, NULL);
697 free(je);
698 return 0;
699}
700
701static int send_update_job_reply(int fd, uint64_t __tag, int error)
702{
703 uint64_t tag = __tag;
704 uint32_t pdu_error;
705
706 pdu_error = __cpu_to_le32(error);
707 return fio_net_send_cmd(fd, FIO_NET_CMD_UPDATE_JOB, &pdu_error, sizeof(pdu_error), &tag, NULL);
708}
709
710static int handle_update_job_cmd(struct fio_net_cmd *cmd)
711{
712 struct cmd_add_job_pdu *pdu = (struct cmd_add_job_pdu *) cmd->payload;
713 struct thread_data *td;
714 uint32_t tnumber;
715
716 tnumber = le32_to_cpu(pdu->thread_number);
717
718 dprint(FD_NET, "server: updating options for job %u\n", tnumber);
719
720 if (!tnumber || tnumber > thread_number) {
721 send_update_job_reply(server_fd, cmd->tag, ENODEV);
722 return 0;
723 }
724
725 td = &threads[tnumber - 1];
726 convert_thread_options_to_cpu(&td->o, &pdu->top);
727 send_update_job_reply(server_fd, cmd->tag, 0);
728 return 0;
729}
730
731static int handle_command(struct flist_head *job_list, struct fio_net_cmd *cmd)
732{
733 int ret;
734
735 dprint(FD_NET, "server: got op [%s], pdu=%u, tag=%llx\n",
736 fio_server_op(cmd->opcode), cmd->pdu_len,
737 (unsigned long long) cmd->tag);
738
739 switch (cmd->opcode) {
740 case FIO_NET_CMD_QUIT:
741 fio_terminate_threads(TERMINATE_ALL);
742 return -1;
743 case FIO_NET_CMD_EXIT:
744 exit_backend = 1;
745 return -1;
746 case FIO_NET_CMD_JOB:
747 ret = handle_job_cmd(cmd);
748 break;
749 case FIO_NET_CMD_JOBLINE:
750 ret = handle_jobline_cmd(cmd);
751 break;
752 case FIO_NET_CMD_PROBE:
753 ret = handle_probe_cmd(cmd);
754 break;
755 case FIO_NET_CMD_SEND_ETA:
756 ret = handle_send_eta_cmd(cmd);
757 break;
758 case FIO_NET_CMD_RUN:
759 ret = handle_run_cmd(job_list, cmd);
760 break;
761 case FIO_NET_CMD_UPDATE_JOB:
762 ret = handle_update_job_cmd(cmd);
763 break;
764 default:
765 log_err("fio: unknown opcode: %s\n", fio_server_op(cmd->opcode));
766 ret = 1;
767 }
768
769 return ret;
770}
771
772static int handle_connection(int sk)
773{
774 struct fio_net_cmd *cmd = NULL;
775 FLIST_HEAD(job_list);
776 int ret = 0;
777
778 reset_fio_state();
779 server_fd = sk;
780
781 /* read forever */
782 while (!exit_backend) {
783 struct pollfd pfd = {
784 .fd = sk,
785 .events = POLLIN,
786 };
787
788 ret = 0;
789 do {
790 int timeout = 1000;
791
792 if (!flist_empty(&job_list))
793 timeout = 100;
794
795 ret = poll(&pfd, 1, timeout);
796 if (ret < 0) {
797 if (errno == EINTR)
798 break;
799 log_err("fio: poll: %s\n", strerror(errno));
800 break;
801 } else if (!ret) {
802 fio_server_check_jobs(&job_list);
803 continue;
804 }
805
806 if (pfd.revents & POLLIN)
807 break;
808 if (pfd.revents & (POLLERR|POLLHUP)) {
809 ret = 1;
810 break;
811 }
812 } while (!exit_backend);
813
814 fio_server_check_jobs(&job_list);
815
816 if (ret < 0)
817 break;
818
819 cmd = fio_net_recv_cmd(sk);
820 if (!cmd) {
821 ret = -1;
822 break;
823 }
824
825 ret = handle_command(&job_list, cmd);
826 if (ret)
827 break;
828
829 free(cmd);
830 cmd = NULL;
831 }
832
833 if (cmd)
834 free(cmd);
835
836 close(sk);
837 _exit(ret);
838}
839
840static int accept_loop(int listen_sk)
841{
842 struct sockaddr_in addr;
843 struct sockaddr_in6 addr6;
844 socklen_t len = use_ipv6 ? sizeof(addr6) : sizeof(addr);
845 struct pollfd pfd;
846 int ret = 0, sk, flags, exitval = 0;
847 FLIST_HEAD(conn_list);
848
849 dprint(FD_NET, "server enter accept loop\n");
850
851 flags = fcntl(listen_sk, F_GETFL);
852 flags |= O_NONBLOCK;
853 fcntl(listen_sk, F_SETFL, flags);
854
855 while (!exit_backend) {
856 const char *from;
857 char buf[64];
858 pid_t pid;
859
860 pfd.fd = listen_sk;
861 pfd.events = POLLIN;
862 do {
863 int timeout = 1000;
864
865 if (!flist_empty(&conn_list))
866 timeout = 100;
867
868 ret = poll(&pfd, 1, timeout);
869 if (ret < 0) {
870 if (errno == EINTR)
871 break;
872 log_err("fio: poll: %s\n", strerror(errno));
873 break;
874 } else if (!ret) {
875 fio_server_check_conns(&conn_list);
876 continue;
877 }
878
879 if (pfd.revents & POLLIN)
880 break;
881 } while (!exit_backend);
882
883 fio_server_check_conns(&conn_list);
884
885 if (exit_backend || ret < 0)
886 break;
887
888 if (use_ipv6)
889 sk = accept(listen_sk, (struct sockaddr *) &addr6, &len);
890 else
891 sk = accept(listen_sk, (struct sockaddr *) &addr, &len);
892
893 if (sk < 0) {
894 log_err("fio: accept: %s\n", strerror(errno));
895 return -1;
896 }
897
898 if (use_ipv6)
899 from = inet_ntop(AF_INET6, (struct sockaddr *) &addr6.sin6_addr, buf, sizeof(buf));
900 else
901 from = inet_ntop(AF_INET, (struct sockaddr *) &addr.sin_addr, buf, sizeof(buf));
902
903 dprint(FD_NET, "server: connect from %s\n", from);
904
905 pid = fork();
906 if (pid) {
907 close(sk);
908 fio_server_add_conn_pid(&conn_list, pid);
909 continue;
910 }
911
912 /* exits */
913 handle_connection(sk);
914 }
915
916 return exitval;
917}
918
919int fio_server_text_output(int level, const char *buf, size_t len)
920{
921 struct cmd_text_pdu *pdu;
922 unsigned int tlen;
923 struct timeval tv;
924
925 if (server_fd == -1)
926 return log_local_buf(buf, len);
927
928 tlen = sizeof(*pdu) + len;
929 pdu = malloc(tlen);
930
931 pdu->level = __cpu_to_le32(level);
932 pdu->buf_len = __cpu_to_le32(len);
933
934 gettimeofday(&tv, NULL);
935 pdu->log_sec = __cpu_to_le64(tv.tv_sec);
936 pdu->log_usec = __cpu_to_le64(tv.tv_usec);
937
938 memcpy(pdu->buf, buf, len);
939
940 fio_net_send_cmd(server_fd, FIO_NET_CMD_TEXT, pdu, tlen, NULL, NULL);
941 free(pdu);
942 return len;
943}
944
945static void convert_io_stat(struct io_stat *dst, struct io_stat *src)
946{
947 dst->max_val = cpu_to_le64(src->max_val);
948 dst->min_val = cpu_to_le64(src->min_val);
949 dst->samples = cpu_to_le64(src->samples);
950
951 /*
952 * Encode to IEEE 754 for network transfer
953 */
954 dst->mean.u.i = __cpu_to_le64(fio_double_to_uint64(src->mean.u.f));
955 dst->S.u.i = __cpu_to_le64(fio_double_to_uint64(src->S.u.f));
956}
957
958static void convert_gs(struct group_run_stats *dst, struct group_run_stats *src)
959{
960 int i;
961
962 for (i = 0; i < DDIR_RWDIR_CNT; i++) {
963 dst->max_run[i] = cpu_to_le64(src->max_run[i]);
964 dst->min_run[i] = cpu_to_le64(src->min_run[i]);
965 dst->max_bw[i] = cpu_to_le64(src->max_bw[i]);
966 dst->min_bw[i] = cpu_to_le64(src->min_bw[i]);
967 dst->io_kb[i] = cpu_to_le64(src->io_kb[i]);
968 dst->agg[i] = cpu_to_le64(src->agg[i]);
969 }
970
971 dst->kb_base = cpu_to_le32(src->kb_base);
972 dst->unit_base = cpu_to_le32(src->unit_base);
973 dst->groupid = cpu_to_le32(src->groupid);
974 dst->unified_rw_rep = cpu_to_le32(src->unified_rw_rep);
975}
976
977/*
978 * Send a CMD_TS, which packs struct thread_stat and group_run_stats
979 * into a single payload.
980 */
981void fio_server_send_ts(struct thread_stat *ts, struct group_run_stats *rs)
982{
983 struct cmd_ts_pdu p;
984 int i, j;
985
986 dprint(FD_NET, "server sending end stats\n");
987
988 memset(&p, 0, sizeof(p));
989
990 strncpy(p.ts.name, ts->name, FIO_JOBNAME_SIZE - 1);
991 strncpy(p.ts.verror, ts->verror, FIO_VERROR_SIZE - 1);
992 strncpy(p.ts.description, ts->description, FIO_JOBDESC_SIZE - 1);
993
994 p.ts.error = cpu_to_le32(ts->error);
995 p.ts.thread_number = cpu_to_le32(ts->thread_number);
996 p.ts.groupid = cpu_to_le32(ts->groupid);
997 p.ts.pid = cpu_to_le32(ts->pid);
998 p.ts.members = cpu_to_le32(ts->members);
999 p.ts.unified_rw_rep = cpu_to_le32(ts->unified_rw_rep);
1000
1001 for (i = 0; i < DDIR_RWDIR_CNT; i++) {
1002 convert_io_stat(&p.ts.clat_stat[i], &ts->clat_stat[i]);
1003 convert_io_stat(&p.ts.slat_stat[i], &ts->slat_stat[i]);
1004 convert_io_stat(&p.ts.lat_stat[i], &ts->lat_stat[i]);
1005 convert_io_stat(&p.ts.bw_stat[i], &ts->bw_stat[i]);
1006 }
1007
1008 p.ts.usr_time = cpu_to_le64(ts->usr_time);
1009 p.ts.sys_time = cpu_to_le64(ts->sys_time);
1010 p.ts.ctx = cpu_to_le64(ts->ctx);
1011 p.ts.minf = cpu_to_le64(ts->minf);
1012 p.ts.majf = cpu_to_le64(ts->majf);
1013 p.ts.clat_percentiles = cpu_to_le64(ts->clat_percentiles);
1014
1015 for (i = 0; i < FIO_IO_U_LIST_MAX_LEN; i++) {
1016 fio_fp64_t *src = &ts->percentile_list[i];
1017 fio_fp64_t *dst = &p.ts.percentile_list[i];
1018
1019 dst->u.i = __cpu_to_le64(fio_double_to_uint64(src->u.f));
1020 }
1021
1022 for (i = 0; i < FIO_IO_U_MAP_NR; i++) {
1023 p.ts.io_u_map[i] = cpu_to_le32(ts->io_u_map[i]);
1024 p.ts.io_u_submit[i] = cpu_to_le32(ts->io_u_submit[i]);
1025 p.ts.io_u_complete[i] = cpu_to_le32(ts->io_u_complete[i]);
1026 }
1027
1028 for (i = 0; i < FIO_IO_U_LAT_U_NR; i++) {
1029 p.ts.io_u_lat_u[i] = cpu_to_le32(ts->io_u_lat_u[i]);
1030 p.ts.io_u_lat_m[i] = cpu_to_le32(ts->io_u_lat_m[i]);
1031 }
1032
1033 for (i = 0; i < DDIR_RWDIR_CNT; i++)
1034 for (j = 0; j < FIO_IO_U_PLAT_NR; j++)
1035 p.ts.io_u_plat[i][j] = cpu_to_le32(ts->io_u_plat[i][j]);
1036
1037 for (i = 0; i < DDIR_RWDIR_CNT; i++) {
1038 p.ts.total_io_u[i] = cpu_to_le64(ts->total_io_u[i]);
1039 p.ts.short_io_u[i] = cpu_to_le64(ts->short_io_u[i]);
1040 }
1041
1042 p.ts.total_submit = cpu_to_le64(ts->total_submit);
1043 p.ts.total_complete = cpu_to_le64(ts->total_complete);
1044
1045 for (i = 0; i < DDIR_RWDIR_CNT; i++) {
1046 p.ts.io_bytes[i] = cpu_to_le64(ts->io_bytes[i]);
1047 p.ts.runtime[i] = cpu_to_le64(ts->runtime[i]);
1048 }
1049
1050 p.ts.total_run_time = cpu_to_le64(ts->total_run_time);
1051 p.ts.continue_on_error = cpu_to_le16(ts->continue_on_error);
1052 p.ts.total_err_count = cpu_to_le64(ts->total_err_count);
1053 p.ts.first_error = cpu_to_le32(ts->first_error);
1054 p.ts.kb_base = cpu_to_le32(ts->kb_base);
1055 p.ts.unit_base = cpu_to_le32(ts->unit_base);
1056
1057 p.ts.latency_depth = cpu_to_le32(ts->latency_depth);
1058 p.ts.latency_target = cpu_to_le64(ts->latency_target);
1059 p.ts.latency_window = cpu_to_le64(ts->latency_window);
1060 p.ts.latency_percentile.u.i = __cpu_to_le64(fio_double_to_uint64(ts->latency_percentile.u.f));
1061
1062 convert_gs(&p.rs, rs);
1063
1064 fio_net_send_cmd(server_fd, FIO_NET_CMD_TS, &p, sizeof(p), NULL, NULL);
1065}
1066
1067void fio_server_send_gs(struct group_run_stats *rs)
1068{
1069 struct group_run_stats gs;
1070
1071 dprint(FD_NET, "server sending group run stats\n");
1072
1073 convert_gs(&gs, rs);
1074 fio_net_send_cmd(server_fd, FIO_NET_CMD_GS, &gs, sizeof(gs), NULL, NULL);
1075}
1076
1077static void convert_agg(struct disk_util_agg *dst, struct disk_util_agg *src)
1078{
1079 int i;
1080
1081 for (i = 0; i < 2; i++) {
1082 dst->ios[i] = cpu_to_le32(src->ios[i]);
1083 dst->merges[i] = cpu_to_le32(src->merges[i]);
1084 dst->sectors[i] = cpu_to_le64(src->sectors[i]);
1085 dst->ticks[i] = cpu_to_le32(src->ticks[i]);
1086 }
1087
1088 dst->io_ticks = cpu_to_le32(src->io_ticks);
1089 dst->time_in_queue = cpu_to_le32(src->time_in_queue);
1090 dst->slavecount = cpu_to_le32(src->slavecount);
1091 dst->max_util.u.i = __cpu_to_le64(fio_double_to_uint64(src->max_util.u.f));
1092}
1093
1094static void convert_dus(struct disk_util_stat *dst, struct disk_util_stat *src)
1095{
1096 int i;
1097
1098 dst->name[FIO_DU_NAME_SZ - 1] = '\0';
1099 strncpy((char *) dst->name, (char *) src->name, FIO_DU_NAME_SZ - 1);
1100
1101 for (i = 0; i < 2; i++) {
1102 dst->s.ios[i] = cpu_to_le32(src->s.ios[i]);
1103 dst->s.merges[i] = cpu_to_le32(src->s.merges[i]);
1104 dst->s.sectors[i] = cpu_to_le64(src->s.sectors[i]);
1105 dst->s.ticks[i] = cpu_to_le32(src->s.ticks[i]);
1106 }
1107
1108 dst->s.io_ticks = cpu_to_le32(src->s.io_ticks);
1109 dst->s.time_in_queue = cpu_to_le32(src->s.time_in_queue);
1110 dst->s.msec = cpu_to_le64(src->s.msec);
1111}
1112
1113void fio_server_send_du(void)
1114{
1115 struct disk_util *du;
1116 struct flist_head *entry;
1117 struct cmd_du_pdu pdu;
1118
1119 dprint(FD_NET, "server: sending disk_util %d\n", !flist_empty(&disk_list));
1120
1121 memset(&pdu, 0, sizeof(pdu));
1122
1123 flist_for_each(entry, &disk_list) {
1124 du = flist_entry(entry, struct disk_util, list);
1125
1126 convert_dus(&pdu.dus, &du->dus);
1127 convert_agg(&pdu.agg, &du->agg);
1128
1129 fio_net_send_cmd(server_fd, FIO_NET_CMD_DU, &pdu, sizeof(pdu), NULL, NULL);
1130 }
1131}
1132
1133/*
1134 * Send a command with a separate PDU, not inlined in the command
1135 */
1136static int fio_send_cmd_ext_pdu(int sk, uint16_t opcode, const void *buf,
1137 off_t size, uint64_t tag, uint32_t flags)
1138{
1139 struct fio_net_cmd cmd;
1140 struct iovec iov[2];
1141
1142 iov[0].iov_base = (void *) &cmd;
1143 iov[0].iov_len = sizeof(cmd);
1144 iov[1].iov_base = (void *) buf;
1145 iov[1].iov_len = size;
1146
1147 __fio_init_net_cmd(&cmd, opcode, size, tag);
1148 cmd.flags = __cpu_to_le32(flags);
1149 fio_net_cmd_crc_pdu(&cmd, buf);
1150
1151 return fio_sendv_data(sk, iov, 2);
1152}
1153
1154static int fio_send_iolog_gz(struct cmd_iolog_pdu *pdu, struct io_log *log)
1155{
1156 int ret = 0;
1157#ifdef CONFIG_ZLIB
1158 z_stream stream;
1159 void *out_pdu;
1160
1161 /*
1162 * Dirty - since the log is potentially huge, compress it into
1163 * FIO_SERVER_MAX_FRAGMENT_PDU chunks and let the receiving
1164 * side defragment it.
1165 */
1166 out_pdu = malloc(FIO_SERVER_MAX_FRAGMENT_PDU);
1167
1168 stream.zalloc = Z_NULL;
1169 stream.zfree = Z_NULL;
1170 stream.opaque = Z_NULL;
1171
1172 if (deflateInit(&stream, Z_DEFAULT_COMPRESSION) != Z_OK) {
1173 ret = 1;
1174 goto err;
1175 }
1176
1177 stream.next_in = (void *) log->log;
1178 stream.avail_in = log->nr_samples * sizeof(struct io_sample);
1179
1180 do {
1181 unsigned int this_len, flags = 0;
1182 int ret;
1183
1184 stream.avail_out = FIO_SERVER_MAX_FRAGMENT_PDU;
1185 stream.next_out = out_pdu;
1186 ret = deflate(&stream, Z_FINISH);
1187 /* may be Z_OK, or Z_STREAM_END */
1188 if (ret < 0)
1189 goto err_zlib;
1190
1191 this_len = FIO_SERVER_MAX_FRAGMENT_PDU - stream.avail_out;
1192
1193 if (stream.avail_in)
1194 flags = FIO_NET_CMD_F_MORE;
1195
1196 ret = fio_send_cmd_ext_pdu(server_fd, FIO_NET_CMD_IOLOG,
1197 out_pdu, this_len, 0, flags);
1198 if (ret)
1199 goto err_zlib;
1200 } while (stream.avail_in);
1201
1202err_zlib:
1203 deflateEnd(&stream);
1204err:
1205 free(out_pdu);
1206#endif
1207 return ret;
1208}
1209
1210int fio_send_iolog(struct thread_data *td, struct io_log *log, const char *name)
1211{
1212 struct cmd_iolog_pdu pdu;
1213 int i, ret = 0;
1214
1215 pdu.thread_number = cpu_to_le32(td->thread_number);
1216 pdu.nr_samples = __cpu_to_le32(log->nr_samples);
1217 pdu.log_type = cpu_to_le32(log->log_type);
1218 pdu.compressed = cpu_to_le32(use_zlib);
1219 strcpy((char *) pdu.name, name);
1220
1221 for (i = 0; i < log->nr_samples; i++) {
1222 struct io_sample *s = &log->log[i];
1223
1224 s->time = cpu_to_le64(s->time);
1225 s->val = cpu_to_le64(s->val);
1226 s->ddir = cpu_to_le32(s->ddir);
1227 s->bs = cpu_to_le32(s->bs);
1228 }
1229
1230 /*
1231 * Send header first, it's not compressed.
1232 */
1233 ret = fio_send_cmd_ext_pdu(server_fd, FIO_NET_CMD_IOLOG, &pdu,
1234 sizeof(pdu), 0, FIO_NET_CMD_F_MORE);
1235 if (ret)
1236 return ret;
1237
1238 /*
1239 * Now send actual log, compress if we can, otherwise just plain
1240 */
1241 if (use_zlib)
1242 return fio_send_iolog_gz(&pdu, log);
1243
1244 return fio_send_cmd_ext_pdu(server_fd, FIO_NET_CMD_IOLOG, log->log,
1245 log->nr_samples * sizeof(struct io_sample), 0, 0);
1246}
1247
1248void fio_server_send_add_job(struct thread_data *td)
1249{
1250 struct cmd_add_job_pdu pdu;
1251
1252 memset(&pdu, 0, sizeof(pdu));
1253 pdu.thread_number = cpu_to_le32(td->thread_number);
1254 pdu.groupid = cpu_to_le32(td->groupid);
1255 convert_thread_options_to_net(&pdu.top, &td->o);
1256
1257 fio_net_send_cmd(server_fd, FIO_NET_CMD_ADD_JOB, &pdu, sizeof(pdu), NULL, NULL);
1258}
1259
1260void fio_server_send_start(struct thread_data *td)
1261{
1262 assert(server_fd != -1);
1263
1264 fio_net_send_simple_cmd(server_fd, FIO_NET_CMD_SERVER_START, 0, NULL);
1265}
1266
1267static int fio_init_server_ip(void)
1268{
1269 struct sockaddr *addr;
1270 socklen_t socklen;
1271 char buf[80];
1272 const char *str;
1273 int sk, opt;
1274
1275 if (use_ipv6)
1276 sk = socket(AF_INET6, SOCK_STREAM, 0);
1277 else
1278 sk = socket(AF_INET, SOCK_STREAM, 0);
1279
1280 if (sk < 0) {
1281 log_err("fio: socket: %s\n", strerror(errno));
1282 return -1;
1283 }
1284
1285 opt = 1;
1286 if (setsockopt(sk, SOL_SOCKET, SO_REUSEADDR, (void *)&opt, sizeof(opt)) < 0) {
1287 log_err("fio: setsockopt: %s\n", strerror(errno));
1288 close(sk);
1289 return -1;
1290 }
1291#ifdef SO_REUSEPORT
1292 if (setsockopt(sk, SOL_SOCKET, SO_REUSEPORT, &opt, sizeof(opt)) < 0) {
1293 log_err("fio: setsockopt: %s\n", strerror(errno));
1294 close(sk);
1295 return -1;
1296 }
1297#endif
1298
1299 if (use_ipv6) {
1300 const void *src = &saddr_in6.sin6_addr;
1301
1302 addr = (struct sockaddr *) &saddr_in6;
1303 socklen = sizeof(saddr_in6);
1304 saddr_in6.sin6_family = AF_INET6;
1305 str = inet_ntop(AF_INET6, src, buf, sizeof(buf));
1306 } else {
1307 const void *src = &saddr_in.sin_addr;
1308
1309 addr = (struct sockaddr *) &saddr_in;
1310 socklen = sizeof(saddr_in);
1311 saddr_in.sin_family = AF_INET;
1312 str = inet_ntop(AF_INET, src, buf, sizeof(buf));
1313 }
1314
1315 if (bind(sk, addr, socklen) < 0) {
1316 log_err("fio: bind: %s\n", strerror(errno));
1317 log_info("fio: failed with IPv%c %s\n", use_ipv6 ? '6' : '4', str);
1318 close(sk);
1319 return -1;
1320 }
1321
1322 return sk;
1323}
1324
1325static int fio_init_server_sock(void)
1326{
1327 struct sockaddr_un addr;
1328 socklen_t len;
1329 mode_t mode;
1330 int sk;
1331
1332 sk = socket(AF_UNIX, SOCK_STREAM, 0);
1333 if (sk < 0) {
1334 log_err("fio: socket: %s\n", strerror(errno));
1335 return -1;
1336 }
1337
1338 mode = umask(000);
1339
1340 memset(&addr, 0, sizeof(addr));
1341 addr.sun_family = AF_UNIX;
1342 strcpy(addr.sun_path, bind_sock);
1343
1344 len = sizeof(addr.sun_family) + strlen(bind_sock) + 1;
1345
1346 if (bind(sk, (struct sockaddr *) &addr, len) < 0) {
1347 log_err("fio: bind: %s\n", strerror(errno));
1348 close(sk);
1349 return -1;
1350 }
1351
1352 umask(mode);
1353 return sk;
1354}
1355
1356static int fio_init_server_connection(void)
1357{
1358 char bind_str[128];
1359 int sk;
1360
1361 dprint(FD_NET, "starting server\n");
1362
1363 if (!bind_sock)
1364 sk = fio_init_server_ip();
1365 else
1366 sk = fio_init_server_sock();
1367
1368 if (sk < 0)
1369 return sk;
1370
1371 memset(bind_str, 0, sizeof(bind_str));
1372
1373 if (!bind_sock) {
1374 char *p, port[16];
1375 const void *src;
1376 int af;
1377
1378 if (use_ipv6) {
1379 af = AF_INET6;
1380 src = &saddr_in6.sin6_addr;
1381 } else {
1382 af = AF_INET;
1383 src = &saddr_in.sin_addr;
1384 }
1385
1386 p = (char *) inet_ntop(af, src, bind_str, sizeof(bind_str));
1387
1388 sprintf(port, ",%u", fio_net_port);
1389 if (p)
1390 strcat(p, port);
1391 else
1392 strncpy(bind_str, port, sizeof(bind_str) - 1);
1393 } else
1394 strncpy(bind_str, bind_sock, sizeof(bind_str) - 1);
1395
1396 log_info("fio: server listening on %s\n", bind_str);
1397
1398 if (listen(sk, 0) < 0) {
1399 log_err("fio: listen: %s\n", strerror(errno));
1400 close(sk);
1401 return -1;
1402 }
1403
1404 return sk;
1405}
1406
1407int fio_server_parse_host(const char *host, int ipv6, struct in_addr *inp,
1408 struct in6_addr *inp6)
1409
1410{
1411 int ret = 0;
1412
1413 if (ipv6)
1414 ret = inet_pton(AF_INET6, host, inp6);
1415 else
1416 ret = inet_pton(AF_INET, host, inp);
1417
1418 if (ret != 1) {
1419 struct addrinfo hints, *res;
1420
1421 memset(&hints, 0, sizeof(hints));
1422 hints.ai_family = ipv6 ? AF_INET6 : AF_INET;
1423 hints.ai_socktype = SOCK_STREAM;
1424
1425 ret = getaddrinfo(host, NULL, &hints, &res);
1426 if (ret) {
1427 log_err("fio: failed to resolve <%s> (%s)\n", host,
1428 gai_strerror(ret));
1429 return 1;
1430 }
1431
1432 if (ipv6)
1433 memcpy(inp6, &((struct sockaddr_in6 *) res->ai_addr)->sin6_addr, sizeof(*inp6));
1434 else
1435 memcpy(inp, &((struct sockaddr_in *) res->ai_addr)->sin_addr, sizeof(*inp));
1436
1437 ret = 1;
1438 freeaddrinfo(res);
1439 }
1440
1441 return !(ret == 1);
1442}
1443
1444/*
1445 * Parse a host/ip/port string. Reads from 'str'.
1446 *
1447 * Outputs:
1448 *
1449 * For IPv4:
1450 * *ptr is the host, *port is the port, inp is the destination.
1451 * For IPv6:
1452 * *ptr is the host, *port is the port, inp6 is the dest, and *ipv6 is 1.
1453 * For local domain sockets:
1454 * *ptr is the filename, *is_sock is 1.
1455 */
1456int fio_server_parse_string(const char *str, char **ptr, int *is_sock,
1457 int *port, struct in_addr *inp,
1458 struct in6_addr *inp6, int *ipv6)
1459{
1460 const char *host = str;
1461 char *portp;
1462 int lport = 0;
1463
1464 *ptr = NULL;
1465 *is_sock = 0;
1466 *port = fio_net_port;
1467 *ipv6 = 0;
1468
1469 if (!strncmp(str, "sock:", 5)) {
1470 *ptr = strdup(str + 5);
1471 *is_sock = 1;
1472
1473 return 0;
1474 }
1475
1476 /*
1477 * Is it ip:<ip or host>:port
1478 */
1479 if (!strncmp(host, "ip:", 3))
1480 host += 3;
1481 else if (!strncmp(host, "ip4:", 4))
1482 host += 4;
1483 else if (!strncmp(host, "ip6:", 4)) {
1484 host += 4;
1485 *ipv6 = 1;
1486 } else if (host[0] == ':') {
1487 /* String is :port */
1488 host++;
1489 lport = atoi(host);
1490 if (!lport || lport > 65535) {
1491 log_err("fio: bad server port %u\n", lport);
1492 return 1;
1493 }
1494 /* no hostname given, we are done */
1495 *port = lport;
1496 return 0;
1497 }
1498
1499 /*
1500 * If no port seen yet, check if there's a last ',' at the end
1501 */
1502 if (!lport) {
1503 portp = strchr(host, ',');
1504 if (portp) {
1505 *portp = '\0';
1506 portp++;
1507 lport = atoi(portp);
1508 if (!lport || lport > 65535) {
1509 log_err("fio: bad server port %u\n", lport);
1510 return 1;
1511 }
1512 }
1513 }
1514
1515 if (lport)
1516 *port = lport;
1517
1518 if (!strlen(host))
1519 return 0;
1520
1521 *ptr = strdup(host);
1522
1523 if (fio_server_parse_host(*ptr, *ipv6, inp, inp6)) {
1524 free(*ptr);
1525 *ptr = NULL;
1526 return 1;
1527 }
1528
1529 if (*port == 0)
1530 *port = fio_net_port;
1531
1532 return 0;
1533}
1534
1535/*
1536 * Server arg should be one of:
1537 *
1538 * sock:/path/to/socket
1539 * ip:1.2.3.4
1540 * 1.2.3.4
1541 *
1542 * Where sock uses unix domain sockets, and ip binds the server to
1543 * a specific interface. If no arguments are given to the server, it
1544 * uses IP and binds to 0.0.0.0.
1545 *
1546 */
1547static int fio_handle_server_arg(void)
1548{
1549 int port = fio_net_port;
1550 int is_sock, ret = 0;
1551
1552 saddr_in.sin_addr.s_addr = htonl(INADDR_ANY);
1553
1554 if (!fio_server_arg)
1555 goto out;
1556
1557 ret = fio_server_parse_string(fio_server_arg, &bind_sock, &is_sock,
1558 &port, &saddr_in.sin_addr,
1559 &saddr_in6.sin6_addr, &use_ipv6);
1560
1561 if (!is_sock && bind_sock) {
1562 free(bind_sock);
1563 bind_sock = NULL;
1564 }
1565
1566out:
1567 fio_net_port = port;
1568 saddr_in.sin_port = htons(port);
1569 saddr_in6.sin6_port = htons(port);
1570 return ret;
1571}
1572
1573static void sig_int(int sig)
1574{
1575 if (bind_sock)
1576 unlink(bind_sock);
1577}
1578
1579static void set_sig_handlers(void)
1580{
1581 struct sigaction act;
1582
1583 memset(&act, 0, sizeof(act));
1584 act.sa_handler = sig_int;
1585 act.sa_flags = SA_RESTART;
1586 sigaction(SIGINT, &act, NULL);
1587}
1588
1589static int fio_server(void)
1590{
1591 int sk, ret;
1592
1593 dprint(FD_NET, "starting server\n");
1594
1595 if (fio_handle_server_arg())
1596 return -1;
1597
1598 sk = fio_init_server_connection();
1599 if (sk < 0)
1600 return -1;
1601
1602 set_sig_handlers();
1603
1604 ret = accept_loop(sk);
1605
1606 close(sk);
1607
1608 if (fio_server_arg) {
1609 free(fio_server_arg);
1610 fio_server_arg = NULL;
1611 }
1612 if (bind_sock)
1613 free(bind_sock);
1614
1615 return ret;
1616}
1617
1618void fio_server_got_signal(int signal)
1619{
1620 if (signal == SIGPIPE)
1621 server_fd = -1;
1622 else {
1623 log_info("\nfio: terminating on signal %d\n", signal);
1624 exit_backend = 1;
1625 }
1626}
1627
1628static int check_existing_pidfile(const char *pidfile)
1629{
1630 struct stat sb;
1631 char buf[16];
1632 pid_t pid;
1633 FILE *f;
1634
1635 if (stat(pidfile, &sb))
1636 return 0;
1637
1638 f = fopen(pidfile, "r");
1639 if (!f)
1640 return 0;
1641
1642 if (fread(buf, sb.st_size, 1, f) <= 0) {
1643 fclose(f);
1644 return 1;
1645 }
1646 fclose(f);
1647
1648 pid = atoi(buf);
1649 if (kill(pid, SIGCONT) < 0)
1650 return errno != ESRCH;
1651
1652 return 1;
1653}
1654
1655static int write_pid(pid_t pid, const char *pidfile)
1656{
1657 FILE *fpid;
1658
1659 fpid = fopen(pidfile, "w");
1660 if (!fpid) {
1661 log_err("fio: failed opening pid file %s\n", pidfile);
1662 return 1;
1663 }
1664
1665 fprintf(fpid, "%u\n", (unsigned int) pid);
1666 fclose(fpid);
1667 return 0;
1668}
1669
1670/*
1671 * If pidfile is specified, background us.
1672 */
1673int fio_start_server(char *pidfile)
1674{
1675 pid_t pid;
1676 int ret;
1677
1678#if defined(WIN32)
1679 WSADATA wsd;
1680 WSAStartup(MAKEWORD(2, 2), &wsd);
1681#endif
1682
1683 if (!pidfile)
1684 return fio_server();
1685
1686 if (check_existing_pidfile(pidfile)) {
1687 log_err("fio: pidfile %s exists and server appears alive\n",
1688 pidfile);
1689 free(pidfile);
1690 return -1;
1691 }
1692
1693 pid = fork();
1694 if (pid < 0) {
1695 log_err("fio: failed server fork: %s", strerror(errno));
1696 free(pidfile);
1697 return -1;
1698 } else if (pid) {
1699 int ret = write_pid(pid, pidfile);
1700
1701 free(pidfile);
1702 exit(ret);
1703 }
1704
1705 setsid();
1706 openlog("fio", LOG_NDELAY|LOG_NOWAIT|LOG_PID, LOG_USER);
1707 log_syslog = 1;
1708 close(STDIN_FILENO);
1709 close(STDOUT_FILENO);
1710 close(STDERR_FILENO);
1711 f_out = NULL;
1712 f_err = NULL;
1713
1714 ret = fio_server();
1715
1716 closelog();
1717 unlink(pidfile);
1718 free(pidfile);
1719 return ret;
1720}
1721
1722void fio_server_set_arg(const char *arg)
1723{
1724 fio_server_arg = strdup(arg);
1725}
fio - Flexible IO Tester