Commit | Line | Data |
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50d16976 JA |
1 | #include <stdio.h> |
2 | #include <stdlib.h> | |
3 | #include <unistd.h> | |
4 | #include <limits.h> | |
50d16976 JA |
5 | #include <errno.h> |
6 | #include <fcntl.h> | |
7 | #include <sys/poll.h> | |
50d16976 JA |
8 | #include <sys/types.h> |
9 | #include <sys/wait.h> | |
50d16976 | 10 | #include <sys/mman.h> |
50d16976 JA |
11 | #include <netinet/in.h> |
12 | #include <arpa/inet.h> | |
13 | #include <netdb.h> | |
14 | ||
15 | #include "fio.h" | |
132159a5 JA |
16 | #include "server.h" |
17 | #include "crc/crc32.h" | |
50d16976 | 18 | |
132159a5 | 19 | int fio_net_port = 8765; |
50d16976 | 20 | |
009b1be4 JA |
21 | int exit_backend = 0; |
22 | ||
132159a5 JA |
23 | static char *job_buf; |
24 | static unsigned int job_cur_len; | |
25 | static unsigned int job_max_len; | |
26 | ||
37db14fe JA |
27 | static int server_fd; |
28 | ||
132159a5 JA |
29 | int fio_send_data(int sk, const void *p, unsigned int len) |
30 | { | |
31 | do { | |
32 | int ret = send(sk, p, len, 0); | |
33 | ||
34 | if (ret > 0) { | |
35 | len -= ret; | |
36 | if (!len) | |
37 | break; | |
38 | p += ret; | |
39 | continue; | |
40 | } else if (!ret) | |
41 | break; | |
42 | else if (errno == EAGAIN || errno == EINTR) | |
43 | continue; | |
44 | } while (!exit_backend); | |
45 | ||
46 | if (!len) | |
47 | return 0; | |
48 | ||
49 | return 1; | |
50 | } | |
51 | ||
52 | int fio_recv_data(int sk, void *p, unsigned int len) | |
53 | { | |
54 | do { | |
55 | int ret = recv(sk, p, len, MSG_WAITALL); | |
56 | ||
57 | if (ret > 0) { | |
58 | len -= ret; | |
59 | if (!len) | |
60 | break; | |
61 | p += ret; | |
62 | continue; | |
63 | } else if (!ret) | |
64 | break; | |
65 | else if (errno == EAGAIN || errno == EINTR) | |
66 | continue; | |
67 | } while (!exit_backend); | |
68 | ||
69 | if (!len) | |
70 | return 0; | |
71 | ||
72 | return -1; | |
73 | } | |
74 | ||
75 | static int verify_convert_cmd(struct fio_net_cmd *cmd) | |
76 | { | |
77 | uint32_t crc; | |
78 | ||
79 | cmd->cmd_crc32 = le32_to_cpu(cmd->cmd_crc32); | |
80 | cmd->pdu_crc32 = le32_to_cpu(cmd->pdu_crc32); | |
81 | ||
82 | crc = crc32(cmd, sizeof(*cmd) - 2 * sizeof(uint32_t)); | |
83 | if (crc != cmd->cmd_crc32) { | |
84 | log_err("fio: server bad crc on command (got %x, wanted %x)\n", | |
85 | cmd->cmd_crc32, crc); | |
86 | return 1; | |
87 | } | |
88 | ||
89 | cmd->version = le16_to_cpu(cmd->version); | |
90 | cmd->opcode = le16_to_cpu(cmd->opcode); | |
91 | cmd->flags = le32_to_cpu(cmd->flags); | |
92 | cmd->serial = le64_to_cpu(cmd->serial); | |
93 | cmd->pdu_len = le32_to_cpu(cmd->pdu_len); | |
94 | ||
95 | switch (cmd->version) { | |
96 | case FIO_SERVER_VER1: | |
97 | break; | |
98 | default: | |
99 | log_err("fio: bad server cmd version %d\n", cmd->version); | |
100 | return 1; | |
101 | } | |
102 | ||
103 | if (cmd->pdu_len > FIO_SERVER_MAX_PDU) { | |
104 | log_err("fio: command payload too large: %u\n", cmd->pdu_len); | |
105 | return 1; | |
106 | } | |
107 | ||
108 | return 0; | |
109 | } | |
110 | ||
37db14fe | 111 | struct fio_net_cmd *fio_net_cmd_read(int sk) |
132159a5 JA |
112 | { |
113 | struct fio_net_cmd cmd, *ret = NULL; | |
114 | uint32_t crc; | |
115 | ||
116 | if (fio_recv_data(sk, &cmd, sizeof(cmd))) | |
117 | return NULL; | |
118 | ||
119 | /* We have a command, verify it and swap if need be */ | |
120 | if (verify_convert_cmd(&cmd)) | |
121 | return NULL; | |
122 | ||
123 | /* Command checks out, alloc real command and fill in */ | |
124 | ret = malloc(sizeof(cmd) + cmd.pdu_len); | |
125 | memcpy(ret, &cmd, sizeof(cmd)); | |
126 | ||
127 | if (!ret->pdu_len) | |
128 | return ret; | |
129 | ||
130 | /* There's payload, get it */ | |
131 | if (fio_recv_data(sk, (void *) ret + sizeof(*ret), ret->pdu_len)) { | |
132 | free(ret); | |
133 | return NULL; | |
134 | } | |
135 | ||
136 | /* Verify payload crc */ | |
137 | crc = crc32(ret->payload, ret->pdu_len); | |
138 | if (crc != ret->pdu_crc32) { | |
139 | log_err("fio: server bad crc on payload (got %x, wanted %x)\n", | |
140 | ret->pdu_crc32, crc); | |
141 | free(ret); | |
142 | return NULL; | |
143 | } | |
144 | ||
145 | ||
146 | return ret; | |
147 | } | |
148 | ||
149 | void fio_net_cmd_crc(struct fio_net_cmd *cmd) | |
150 | { | |
151 | uint32_t pdu_len; | |
152 | ||
153 | cmd->cmd_crc32 = cpu_to_le32(crc32(cmd, | |
154 | sizeof(*cmd) - 2 * sizeof(uint32_t))); | |
155 | ||
156 | pdu_len = le32_to_cpu(cmd->pdu_len); | |
157 | if (pdu_len) | |
158 | cmd->pdu_crc32 = cpu_to_le32(crc32(cmd->payload, pdu_len)); | |
159 | } | |
160 | ||
161 | static int send_simple_command(int sk, uint16_t opcode, uint64_t serial) | |
162 | { | |
163 | struct fio_net_cmd cmd = { | |
164 | .version = cpu_to_le16(FIO_SERVER_VER1), | |
165 | .opcode = cpu_to_le16(opcode), | |
166 | .serial = cpu_to_le16(serial), | |
167 | }; | |
168 | ||
169 | fio_net_cmd_crc(&cmd); | |
170 | ||
171 | return fio_send_data(sk, &cmd, sizeof(cmd)); | |
172 | } | |
173 | ||
174 | /* | |
175 | * Send an ack for this command | |
176 | */ | |
177 | static int ack_command(int sk, struct fio_net_cmd *cmd) | |
178 | { | |
179 | return send_simple_command(sk, FIO_NET_CMD_ACK, cmd->serial); | |
180 | } | |
181 | ||
182 | #if 0 | |
183 | static int nak_command(int sk, struct fio_net_cmd *cmd) | |
184 | { | |
185 | return send_simple_command(sk, FIO_NET_CMD_NAK, cmd->serial); | |
186 | } | |
187 | #endif | |
188 | ||
189 | static int handle_cur_job(struct fio_net_cmd *cmd, int done) | |
190 | { | |
191 | unsigned int left = job_max_len - job_cur_len; | |
192 | int ret = 0; | |
193 | ||
194 | if (left < cmd->pdu_len) { | |
195 | job_buf = realloc(job_buf, job_max_len + 2 * cmd->pdu_len); | |
196 | job_max_len += 2 * cmd->pdu_len; | |
197 | } | |
198 | ||
199 | memcpy(job_buf + job_cur_len, cmd->payload, cmd->pdu_len); | |
200 | job_cur_len += cmd->pdu_len; | |
201 | ||
202 | if (done) { | |
203 | parse_jobs_ini(job_buf, 1, 0); | |
204 | ret = exec_run(); | |
205 | reset_fio_state(); | |
206 | free(job_buf); | |
207 | job_buf = NULL; | |
208 | job_cur_len = job_max_len = 0; | |
209 | } | |
210 | ||
211 | return ret; | |
212 | } | |
213 | ||
214 | static int handle_command(struct fio_net_cmd *cmd) | |
215 | { | |
216 | int ret; | |
217 | ||
218 | switch (cmd->opcode) { | |
219 | case FIO_NET_CMD_QUIT: | |
220 | exit_backend = 1; | |
221 | return 1; | |
222 | case FIO_NET_CMD_ACK: | |
223 | return 0; | |
224 | case FIO_NET_CMD_NAK: | |
225 | return 1; | |
226 | case FIO_NET_CMD_JOB: | |
227 | ret = handle_cur_job(cmd, 0); | |
228 | break; | |
229 | case FIO_NET_CMD_JOB_END: | |
230 | ret = handle_cur_job(cmd, 1); | |
231 | break; | |
232 | default: | |
233 | log_err("fio: unknown opcode: %d\n", cmd->opcode); | |
234 | ret = 1; | |
235 | } | |
236 | ||
237 | return ret; | |
238 | } | |
239 | ||
240 | static int handle_connection(int sk) | |
241 | { | |
242 | struct fio_net_cmd *cmd = NULL; | |
243 | int ret = 0; | |
244 | ||
245 | /* read forever */ | |
246 | while (!exit_backend) { | |
37db14fe | 247 | cmd = fio_net_cmd_read(sk); |
132159a5 JA |
248 | if (!cmd) { |
249 | ret = 1; | |
250 | break; | |
251 | } | |
252 | ||
253 | ret = ack_command(sk, cmd); | |
254 | if (ret) | |
255 | break; | |
256 | ||
257 | ret = handle_command(cmd); | |
258 | if (ret) | |
259 | break; | |
260 | ||
261 | free(cmd); | |
262 | } | |
263 | ||
264 | if (cmd) | |
265 | free(cmd); | |
266 | ||
267 | return ret; | |
268 | } | |
269 | ||
50d16976 JA |
270 | static int accept_loop(int listen_sk) |
271 | { | |
272 | struct sockaddr addr; | |
273 | unsigned int len = sizeof(addr); | |
009b1be4 | 274 | struct pollfd pfd; |
132159a5 | 275 | int ret, sk, flags, exitval = 0; |
50d16976 | 276 | |
009b1be4 JA |
277 | flags = fcntl(listen_sk, F_GETFL); |
278 | flags |= O_NONBLOCK; | |
279 | fcntl(listen_sk, F_SETFL, flags); | |
50d16976 | 280 | again: |
009b1be4 JA |
281 | pfd.fd = listen_sk; |
282 | pfd.events = POLLIN; | |
283 | do { | |
284 | ret = poll(&pfd, 1, 100); | |
285 | if (ret < 0) { | |
286 | if (errno == EINTR) | |
287 | break; | |
288 | perror("poll"); | |
289 | goto out; | |
290 | } else if (!ret) | |
291 | continue; | |
292 | ||
293 | if (pfd.revents & POLLIN) | |
294 | break; | |
295 | } while (!exit_backend); | |
296 | ||
297 | if (exit_backend) | |
298 | goto out; | |
299 | ||
50d16976 | 300 | sk = accept(listen_sk, &addr, &len); |
50d16976 | 301 | if (sk < 0) { |
690e09ae | 302 | log_err("fio: accept: %s\n", strerror(errno)); |
50d16976 JA |
303 | return -1; |
304 | } | |
305 | ||
37db14fe JA |
306 | server_fd = sk; |
307 | ||
132159a5 | 308 | exitval = handle_connection(sk); |
50d16976 | 309 | |
37db14fe | 310 | server_fd = -1; |
50d16976 | 311 | close(sk); |
5c341e9a | 312 | |
009b1be4 | 313 | if (!exit_backend) |
5c341e9a JA |
314 | goto again; |
315 | ||
009b1be4 | 316 | out: |
132159a5 | 317 | return exitval; |
50d16976 JA |
318 | } |
319 | ||
320 | int fio_server(void) | |
321 | { | |
322 | struct sockaddr_in saddr_in; | |
323 | struct sockaddr addr; | |
324 | unsigned int len; | |
afcf7758 | 325 | int sk, opt, ret; |
50d16976 JA |
326 | |
327 | sk = socket(AF_INET, SOCK_STREAM, 0); | |
328 | if (sk < 0) { | |
690e09ae | 329 | log_err("fio: socket: %s\n", strerror(errno)); |
50d16976 JA |
330 | return -1; |
331 | } | |
332 | ||
333 | opt = 1; | |
334 | if (setsockopt(sk, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)) < 0) { | |
690e09ae | 335 | log_err("fio: setsockopt: %s\n", strerror(errno)); |
50d16976 JA |
336 | return -1; |
337 | } | |
338 | #ifdef SO_REUSEPORT | |
339 | if (setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &opt, sizeof(opt)) < 0) { | |
690e09ae | 340 | log_err("fio: setsockopt: %s\n", strerror(errno)); |
50d16976 JA |
341 | return 1; |
342 | } | |
343 | #endif | |
344 | ||
345 | saddr_in.sin_family = AF_INET; | |
346 | saddr_in.sin_addr.s_addr = htonl(INADDR_ANY); | |
132159a5 | 347 | saddr_in.sin_port = htons(fio_net_port); |
50d16976 JA |
348 | |
349 | if (bind(sk, (struct sockaddr *) &saddr_in, sizeof(saddr_in)) < 0) { | |
690e09ae | 350 | log_err("fio: bind: %s\n", strerror(errno)); |
50d16976 JA |
351 | return -1; |
352 | } | |
353 | ||
354 | if (listen(sk, 1) < 0) { | |
690e09ae | 355 | log_err("fio: listen: %s\n", strerror(errno)); |
50d16976 JA |
356 | return -1; |
357 | } | |
358 | ||
359 | len = sizeof(addr); | |
360 | if (getsockname(sk, &addr, &len) < 0) { | |
690e09ae | 361 | log_err("fio: getsockname: %s\n", strerror(errno)); |
50d16976 JA |
362 | return -1; |
363 | } | |
364 | ||
afcf7758 JA |
365 | ret = accept_loop(sk); |
366 | close(sk); | |
367 | return ret; | |
50d16976 | 368 | } |
37db14fe JA |
369 | |
370 | void fio_server_text_output(const char *buf, unsigned int len) | |
371 | { | |
372 | struct fio_net_cmd *cmd; | |
373 | ||
374 | cmd = malloc(sizeof(*cmd) + len); | |
375 | fio_init_net_cmd(cmd); | |
376 | cmd->opcode = cpu_to_le16(FIO_NET_CMD_TEXT); | |
377 | cmd->pdu_len = cpu_to_le32(len); | |
378 | memcpy(&cmd->payload, buf, len); | |
379 | ||
380 | fio_net_cmd_crc(cmd); | |
381 | ||
382 | fio_send_data(server_fd, cmd, sizeof(*cmd) + len); | |
383 | free(cmd); | |
384 | } |