11 #include <netinet/in.h>
12 #include <arpa/inet.h>
17 #include "crc/crc32.h"
19 int fio_net_port = 8765;
24 static unsigned int job_cur_len;
25 static unsigned int job_max_len;
27 int fio_send_data(int sk, const void *p, unsigned int len)
30 int ret = send(sk, p, len, 0);
40 else if (errno == EAGAIN || errno == EINTR)
42 } while (!exit_backend);
50 int fio_recv_data(int sk, void *p, unsigned int len)
53 int ret = recv(sk, p, len, MSG_WAITALL);
63 else if (errno == EAGAIN || errno == EINTR)
65 } while (!exit_backend);
73 static int verify_convert_cmd(struct fio_net_cmd *cmd)
77 cmd->cmd_crc32 = le32_to_cpu(cmd->cmd_crc32);
78 cmd->pdu_crc32 = le32_to_cpu(cmd->pdu_crc32);
80 crc = crc32(cmd, sizeof(*cmd) - 2 * sizeof(uint32_t));
81 if (crc != cmd->cmd_crc32) {
82 log_err("fio: server bad crc on command (got %x, wanted %x)\n",
87 cmd->version = le16_to_cpu(cmd->version);
88 cmd->opcode = le16_to_cpu(cmd->opcode);
89 cmd->flags = le32_to_cpu(cmd->flags);
90 cmd->serial = le64_to_cpu(cmd->serial);
91 cmd->pdu_len = le32_to_cpu(cmd->pdu_len);
93 switch (cmd->version) {
97 log_err("fio: bad server cmd version %d\n", cmd->version);
101 if (cmd->pdu_len > FIO_SERVER_MAX_PDU) {
102 log_err("fio: command payload too large: %u\n", cmd->pdu_len);
109 static struct fio_net_cmd *read_command(int sk)
111 struct fio_net_cmd cmd, *ret = NULL;
114 if (fio_recv_data(sk, &cmd, sizeof(cmd)))
117 /* We have a command, verify it and swap if need be */
118 if (verify_convert_cmd(&cmd))
121 /* Command checks out, alloc real command and fill in */
122 ret = malloc(sizeof(cmd) + cmd.pdu_len);
123 memcpy(ret, &cmd, sizeof(cmd));
128 /* There's payload, get it */
129 if (fio_recv_data(sk, (void *) ret + sizeof(*ret), ret->pdu_len)) {
134 /* Verify payload crc */
135 crc = crc32(ret->payload, ret->pdu_len);
136 if (crc != ret->pdu_crc32) {
137 log_err("fio: server bad crc on payload (got %x, wanted %x)\n",
138 ret->pdu_crc32, crc);
147 void fio_net_cmd_crc(struct fio_net_cmd *cmd)
151 cmd->cmd_crc32 = cpu_to_le32(crc32(cmd,
152 sizeof(*cmd) - 2 * sizeof(uint32_t)));
154 pdu_len = le32_to_cpu(cmd->pdu_len);
156 cmd->pdu_crc32 = cpu_to_le32(crc32(cmd->payload, pdu_len));
159 static int send_simple_command(int sk, uint16_t opcode, uint64_t serial)
161 struct fio_net_cmd cmd = {
162 .version = cpu_to_le16(FIO_SERVER_VER1),
163 .opcode = cpu_to_le16(opcode),
164 .serial = cpu_to_le16(serial),
167 fio_net_cmd_crc(&cmd);
169 return fio_send_data(sk, &cmd, sizeof(cmd));
173 * Send an ack for this command
175 static int ack_command(int sk, struct fio_net_cmd *cmd)
177 return send_simple_command(sk, FIO_NET_CMD_ACK, cmd->serial);
181 static int nak_command(int sk, struct fio_net_cmd *cmd)
183 return send_simple_command(sk, FIO_NET_CMD_NAK, cmd->serial);
187 static int handle_cur_job(struct fio_net_cmd *cmd, int done)
189 unsigned int left = job_max_len - job_cur_len;
192 if (left < cmd->pdu_len) {
193 job_buf = realloc(job_buf, job_max_len + 2 * cmd->pdu_len);
194 job_max_len += 2 * cmd->pdu_len;
197 memcpy(job_buf + job_cur_len, cmd->payload, cmd->pdu_len);
198 job_cur_len += cmd->pdu_len;
201 parse_jobs_ini(job_buf, 1, 0);
206 job_cur_len = job_max_len = 0;
212 static int handle_command(struct fio_net_cmd *cmd)
216 switch (cmd->opcode) {
217 case FIO_NET_CMD_QUIT:
220 case FIO_NET_CMD_ACK:
222 case FIO_NET_CMD_NAK:
224 case FIO_NET_CMD_JOB:
225 ret = handle_cur_job(cmd, 0);
227 case FIO_NET_CMD_JOB_END:
228 ret = handle_cur_job(cmd, 1);
231 log_err("fio: unknown opcode: %d\n", cmd->opcode);
238 static int handle_connection(int sk)
240 struct fio_net_cmd *cmd = NULL;
244 while (!exit_backend) {
245 cmd = read_command(sk);
251 ret = ack_command(sk, cmd);
255 ret = handle_command(cmd);
268 static int accept_loop(int listen_sk)
270 struct sockaddr addr;
271 unsigned int len = sizeof(addr);
273 int ret, sk, flags, exitval = 0;
275 flags = fcntl(listen_sk, F_GETFL);
277 fcntl(listen_sk, F_SETFL, flags);
282 ret = poll(&pfd, 1, 100);
291 if (pfd.revents & POLLIN)
293 } while (!exit_backend);
298 sk = accept(listen_sk, &addr, &len);
300 log_err("fio: accept: %s\n", strerror(errno));
304 exitval = handle_connection(sk);
317 struct sockaddr_in saddr_in;
318 struct sockaddr addr;
322 sk = socket(AF_INET, SOCK_STREAM, 0);
324 log_err("fio: socket: %s\n", strerror(errno));
329 if (setsockopt(sk, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)) < 0) {
330 log_err("fio: setsockopt: %s\n", strerror(errno));
334 if (setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &opt, sizeof(opt)) < 0) {
335 log_err("fio: setsockopt: %s\n", strerror(errno));
340 saddr_in.sin_family = AF_INET;
341 saddr_in.sin_addr.s_addr = htonl(INADDR_ANY);
342 saddr_in.sin_port = htons(fio_net_port);
344 if (bind(sk, (struct sockaddr *) &saddr_in, sizeof(saddr_in)) < 0) {
345 log_err("fio: bind: %s\n", strerror(errno));
349 if (listen(sk, 1) < 0) {
350 log_err("fio: listen: %s\n", strerror(errno));
355 if (getsockname(sk, &addr, &len) < 0) {
356 log_err("fio: getsockname: %s\n", strerror(errno));
360 ret = accept_loop(sk);