12 #include <netinet/in.h>
13 #include <arpa/inet.h>
18 #include "crc/crc32.h"
20 int fio_net_port = 8765;
25 static unsigned int job_cur_len;
26 static unsigned int job_max_len;
30 int fio_send_data(int sk, const void *p, unsigned int len)
33 int ret = send(sk, p, len, 0);
43 else if (errno == EAGAIN || errno == EINTR)
45 } while (!exit_backend);
53 int fio_recv_data(int sk, void *p, unsigned int len)
56 int ret = recv(sk, p, len, MSG_WAITALL);
66 else if (errno == EAGAIN || errno == EINTR)
68 } while (!exit_backend);
76 static int verify_convert_cmd(struct fio_net_cmd *cmd)
80 cmd->cmd_crc32 = le32_to_cpu(cmd->cmd_crc32);
81 cmd->pdu_crc32 = le32_to_cpu(cmd->pdu_crc32);
83 crc = crc32(cmd, sizeof(*cmd) - 2 * sizeof(uint32_t));
84 if (crc != cmd->cmd_crc32) {
85 log_err("fio: server bad crc on command (got %x, wanted %x)\n",
90 cmd->version = le16_to_cpu(cmd->version);
91 cmd->opcode = le16_to_cpu(cmd->opcode);
92 cmd->flags = le32_to_cpu(cmd->flags);
93 cmd->serial = le64_to_cpu(cmd->serial);
94 cmd->pdu_len = le32_to_cpu(cmd->pdu_len);
96 switch (cmd->version) {
100 log_err("fio: bad server cmd version %d\n", cmd->version);
104 if (cmd->pdu_len > FIO_SERVER_MAX_PDU) {
105 log_err("fio: command payload too large: %u\n", cmd->pdu_len);
112 struct fio_net_cmd *fio_net_cmd_read(int sk)
114 struct fio_net_cmd cmd, *ret = NULL;
117 if (fio_recv_data(sk, &cmd, sizeof(cmd)))
120 /* We have a command, verify it and swap if need be */
121 if (verify_convert_cmd(&cmd))
124 /* Command checks out, alloc real command and fill in */
125 ret = malloc(sizeof(cmd) + cmd.pdu_len);
126 memcpy(ret, &cmd, sizeof(cmd));
131 /* There's payload, get it */
132 if (fio_recv_data(sk, (void *) ret + sizeof(*ret), ret->pdu_len)) {
137 /* Verify payload crc */
138 crc = crc32(ret->payload, ret->pdu_len);
139 if (crc != ret->pdu_crc32) {
140 log_err("fio: server bad crc on payload (got %x, wanted %x)\n",
141 ret->pdu_crc32, crc);
149 void fio_net_cmd_crc(struct fio_net_cmd *cmd)
153 cmd->cmd_crc32 = cpu_to_le32(crc32(cmd,
154 sizeof(*cmd) - 2 * sizeof(uint32_t)));
156 pdu_len = le32_to_cpu(cmd->pdu_len);
158 cmd->pdu_crc32 = cpu_to_le32(crc32(cmd->payload, pdu_len));
161 static int send_simple_command(int sk, uint16_t opcode, uint64_t serial)
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),
169 fio_net_cmd_crc(&cmd);
171 return fio_send_data(sk, &cmd, sizeof(cmd));
175 * Send an ack for this command
177 static int ack_command(int sk, struct fio_net_cmd *cmd)
179 return send_simple_command(sk, FIO_NET_CMD_ACK, cmd->serial);
183 static int nak_command(int sk, struct fio_net_cmd *cmd)
185 return send_simple_command(sk, FIO_NET_CMD_NAK, cmd->serial);
189 static int handle_cur_job(struct fio_net_cmd *cmd, int done)
191 unsigned int left = job_max_len - job_cur_len;
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;
199 memcpy(job_buf + job_cur_len, cmd->payload, cmd->pdu_len);
200 job_cur_len += cmd->pdu_len;
203 parse_jobs_ini(job_buf, 1, 0);
208 job_cur_len = job_max_len = 0;
214 static int handle_command(struct fio_net_cmd *cmd)
218 switch (cmd->opcode) {
219 case FIO_NET_CMD_QUIT:
222 case FIO_NET_CMD_ACK:
224 case FIO_NET_CMD_NAK:
226 case FIO_NET_CMD_JOB:
227 ret = handle_cur_job(cmd, 0);
229 case FIO_NET_CMD_JOB_END:
230 ret = handle_cur_job(cmd, 1);
233 log_err("fio: unknown opcode: %d\n", cmd->opcode);
240 static int handle_connection(int sk)
242 struct fio_net_cmd *cmd = NULL;
246 while (!exit_backend) {
247 cmd = fio_net_cmd_read(sk);
253 ret = ack_command(sk, cmd);
257 ret = handle_command(cmd);
270 static int accept_loop(int listen_sk)
272 struct sockaddr addr;
273 unsigned int len = sizeof(addr);
275 int ret, sk, flags, exitval = 0;
277 flags = fcntl(listen_sk, F_GETFL);
279 fcntl(listen_sk, F_SETFL, flags);
284 ret = poll(&pfd, 1, 100);
293 if (pfd.revents & POLLIN)
295 } while (!exit_backend);
300 sk = accept(listen_sk, &addr, &len);
302 log_err("fio: accept: %s\n", strerror(errno));
308 exitval = handle_connection(sk);
322 struct sockaddr_in saddr_in;
323 struct sockaddr addr;
327 sk = socket(AF_INET, SOCK_STREAM, 0);
329 log_err("fio: socket: %s\n", strerror(errno));
334 if (setsockopt(sk, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)) < 0) {
335 log_err("fio: setsockopt: %s\n", strerror(errno));
339 if (setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &opt, sizeof(opt)) < 0) {
340 log_err("fio: setsockopt: %s\n", strerror(errno));
345 saddr_in.sin_family = AF_INET;
346 saddr_in.sin_addr.s_addr = htonl(INADDR_ANY);
347 saddr_in.sin_port = htons(fio_net_port);
349 if (bind(sk, (struct sockaddr *) &saddr_in, sizeof(saddr_in)) < 0) {
350 log_err("fio: bind: %s\n", strerror(errno));
354 if (listen(sk, 1) < 0) {
355 log_err("fio: listen: %s\n", strerror(errno));
360 if (getsockname(sk, &addr, &len) < 0) {
361 log_err("fio: getsockname: %s\n", strerror(errno));
365 ret = accept_loop(sk);
370 int fio_server_text_output(const char *buf, unsigned int len)
372 struct fio_net_cmd *cmd;
373 int size = sizeof(*cmd) + len;
376 fio_init_net_cmd(cmd, FIO_NET_CMD_TEXT, buf, len);
377 fio_net_cmd_crc(cmd);
379 fio_send_data(server_fd, cmd, size);
384 int fio_server_log(const char *format, ...)
389 va_start(args, format);
390 snprintf(buffer, sizeof(buffer), format, args);
393 return fio_server_text_output(buffer, strlen(buffer));