+ switch (cmd->opcode) {
+ case FIO_NET_CMD_QUIT:
+ fio_terminate_threads(TERMINATE_ALL);
+ return -1;
+ case FIO_NET_CMD_EXIT:
+ exit_backend = 1;
+ return -1;
+ case FIO_NET_CMD_LOAD_FILE:
+ ret = handle_load_file_cmd(cmd);
+ break;
+ case FIO_NET_CMD_JOB:
+ ret = handle_job_cmd(cmd);
+ break;
+ case FIO_NET_CMD_JOBLINE:
+ ret = handle_jobline_cmd(cmd);
+ break;
+ case FIO_NET_CMD_PROBE:
+ ret = handle_probe_cmd(cmd);
+ break;
+ case FIO_NET_CMD_SEND_ETA:
+ ret = handle_send_eta_cmd(cmd);
+ break;
+ case FIO_NET_CMD_RUN:
+ ret = handle_run_cmd(job_list, cmd);
+ break;
+ case FIO_NET_CMD_UPDATE_JOB:
+ ret = handle_update_job_cmd(cmd);
+ break;
+ default:
+ log_err("fio: unknown opcode: %s\n", fio_server_op(cmd->opcode));
+ ret = 1;
+ }
+
+ return ret;
+}
+
+static int handle_connection(int sk)
+{
+ struct fio_net_cmd *cmd = NULL;
+ FLIST_HEAD(job_list);
+ int ret = 0;
+
+ reset_fio_state();
+ server_fd = sk;
+
+ /* read forever */
+ while (!exit_backend) {
+ struct pollfd pfd = {
+ .fd = sk,
+ .events = POLLIN,
+ };
+
+ ret = 0;
+ do {
+ int timeout = 1000;
+
+ if (!flist_empty(&job_list))
+ timeout = 100;
+
+ ret = poll(&pfd, 1, timeout);
+ if (ret < 0) {
+ if (errno == EINTR)
+ break;
+ log_err("fio: poll: %s\n", strerror(errno));
+ break;
+ } else if (!ret) {
+ fio_server_check_jobs(&job_list);
+ continue;
+ }
+
+ if (pfd.revents & POLLIN)
+ break;
+ if (pfd.revents & (POLLERR|POLLHUP)) {
+ ret = 1;
+ break;
+ }
+ } while (!exit_backend);
+
+ fio_server_check_jobs(&job_list);
+
+ if (ret < 0)
+ break;
+
+ cmd = fio_net_recv_cmd(sk);
+ if (!cmd) {
+ ret = -1;
+ break;
+ }
+
+ ret = handle_command(&job_list, cmd);
+ if (ret)
+ break;
+
+ free(cmd);
+ cmd = NULL;
+ }
+
+ if (cmd)
+ free(cmd);
+
+ close(sk);
+ _exit(ret);
+}
+
+static int accept_loop(int listen_sk)
+{
+ struct sockaddr_in addr;
+ struct sockaddr_in6 addr6;
+ socklen_t len = use_ipv6 ? sizeof(addr6) : sizeof(addr);
+ struct pollfd pfd;
+ int ret = 0, sk, exitval = 0;
+ FLIST_HEAD(conn_list);
+
+ dprint(FD_NET, "server enter accept loop\n");
+
+ fio_set_fd_nonblocking(listen_sk, "server");
+
+ while (!exit_backend) {
+ const char *from;
+ char buf[64];
+ pid_t pid;
+
+ pfd.fd = listen_sk;
+ pfd.events = POLLIN;
+ do {
+ int timeout = 1000;
+
+ if (!flist_empty(&conn_list))
+ timeout = 100;
+
+ ret = poll(&pfd, 1, timeout);
+ if (ret < 0) {
+ if (errno == EINTR)
+ break;
+ log_err("fio: poll: %s\n", strerror(errno));
+ break;
+ } else if (!ret) {
+ fio_server_check_conns(&conn_list);
+ continue;
+ }
+
+ if (pfd.revents & POLLIN)
+ break;
+ } while (!exit_backend);
+
+ fio_server_check_conns(&conn_list);
+
+ if (exit_backend || ret < 0)
+ break;
+
+ if (use_ipv6)
+ sk = accept(listen_sk, (struct sockaddr *) &addr6, &len);
+ else
+ sk = accept(listen_sk, (struct sockaddr *) &addr, &len);
+
+ if (sk < 0) {
+ log_err("fio: accept: %s\n", strerror(errno));
+ return -1;
+ }
+
+ if (use_ipv6)
+ from = inet_ntop(AF_INET6, (struct sockaddr *) &addr6.sin6_addr, buf, sizeof(buf));
+ else
+ from = inet_ntop(AF_INET, (struct sockaddr *) &addr.sin_addr, buf, sizeof(buf));
+
+ dprint(FD_NET, "server: connect from %s\n", from);
+
+ pid = fork();
+ if (pid) {
+ close(sk);
+ fio_server_add_conn_pid(&conn_list, pid);
+ continue;
+ }
+
+ /* exits */
+ handle_connection(sk);
+ }
+
+ return exitval;
+}
+
+int fio_server_text_output(int level, const char *buf, size_t len)
+{
+ struct cmd_text_pdu *pdu;
+ unsigned int tlen;
+ struct timeval tv;
+
+ if (server_fd == -1)
+ return log_local_buf(buf, len);
+
+ tlen = sizeof(*pdu) + len;
+ pdu = malloc(tlen);
+
+ pdu->level = __cpu_to_le32(level);
+ pdu->buf_len = __cpu_to_le32(len);
+
+ gettimeofday(&tv, NULL);
+ pdu->log_sec = __cpu_to_le64(tv.tv_sec);
+ pdu->log_usec = __cpu_to_le64(tv.tv_usec);
+
+ memcpy(pdu->buf, buf, len);
+
+ fio_net_send_cmd(server_fd, FIO_NET_CMD_TEXT, pdu, tlen, NULL, NULL);
+ free(pdu);
+ return len;
+}
+
+static void convert_io_stat(struct io_stat *dst, struct io_stat *src)
+{
+ dst->max_val = cpu_to_le64(src->max_val);
+ dst->min_val = cpu_to_le64(src->min_val);
+ dst->samples = cpu_to_le64(src->samples);
+
+ /*
+ * Encode to IEEE 754 for network transfer
+ */
+ dst->mean.u.i = cpu_to_le64(fio_double_to_uint64(src->mean.u.f));
+ dst->S.u.i = cpu_to_le64(fio_double_to_uint64(src->S.u.f));
+}
+
+static void convert_gs(struct group_run_stats *dst, struct group_run_stats *src)
+{
+ int i;
+
+ for (i = 0; i < DDIR_RWDIR_CNT; i++) {
+ dst->max_run[i] = cpu_to_le64(src->max_run[i]);
+ dst->min_run[i] = cpu_to_le64(src->min_run[i]);
+ dst->max_bw[i] = cpu_to_le64(src->max_bw[i]);
+ dst->min_bw[i] = cpu_to_le64(src->min_bw[i]);
+ dst->io_kb[i] = cpu_to_le64(src->io_kb[i]);
+ dst->agg[i] = cpu_to_le64(src->agg[i]);
+ }
+
+ dst->kb_base = cpu_to_le32(src->kb_base);
+ dst->unit_base = cpu_to_le32(src->unit_base);
+ dst->groupid = cpu_to_le32(src->groupid);
+ dst->unified_rw_rep = cpu_to_le32(src->unified_rw_rep);
+}
+
+/*
+ * Send a CMD_TS, which packs struct thread_stat and group_run_stats
+ * into a single payload.
+ */
+void fio_server_send_ts(struct thread_stat *ts, struct group_run_stats *rs)
+{
+ struct cmd_ts_pdu p;
+ int i, j;
+
+ dprint(FD_NET, "server sending end stats\n");
+
+ memset(&p, 0, sizeof(p));
+
+ strncpy(p.ts.name, ts->name, FIO_JOBNAME_SIZE - 1);
+ strncpy(p.ts.verror, ts->verror, FIO_VERROR_SIZE - 1);
+ strncpy(p.ts.description, ts->description, FIO_JOBDESC_SIZE - 1);
+
+ p.ts.error = cpu_to_le32(ts->error);
+ p.ts.thread_number = cpu_to_le32(ts->thread_number);
+ p.ts.groupid = cpu_to_le32(ts->groupid);
+ p.ts.pid = cpu_to_le32(ts->pid);
+ p.ts.members = cpu_to_le32(ts->members);
+ p.ts.unified_rw_rep = cpu_to_le32(ts->unified_rw_rep);
+
+ for (i = 0; i < DDIR_RWDIR_CNT; i++) {
+ convert_io_stat(&p.ts.clat_stat[i], &ts->clat_stat[i]);
+ convert_io_stat(&p.ts.slat_stat[i], &ts->slat_stat[i]);
+ convert_io_stat(&p.ts.lat_stat[i], &ts->lat_stat[i]);
+ convert_io_stat(&p.ts.bw_stat[i], &ts->bw_stat[i]);
+ }
+
+ p.ts.usr_time = cpu_to_le64(ts->usr_time);
+ p.ts.sys_time = cpu_to_le64(ts->sys_time);
+ p.ts.ctx = cpu_to_le64(ts->ctx);
+ p.ts.minf = cpu_to_le64(ts->minf);
+ p.ts.majf = cpu_to_le64(ts->majf);
+ p.ts.clat_percentiles = cpu_to_le64(ts->clat_percentiles);
+
+ for (i = 0; i < FIO_IO_U_LIST_MAX_LEN; i++) {
+ fio_fp64_t *src = &ts->percentile_list[i];
+ fio_fp64_t *dst = &p.ts.percentile_list[i];
+
+ dst->u.i = cpu_to_le64(fio_double_to_uint64(src->u.f));
+ }
+
+ for (i = 0; i < FIO_IO_U_MAP_NR; i++) {
+ p.ts.io_u_map[i] = cpu_to_le32(ts->io_u_map[i]);
+ p.ts.io_u_submit[i] = cpu_to_le32(ts->io_u_submit[i]);
+ p.ts.io_u_complete[i] = cpu_to_le32(ts->io_u_complete[i]);
+ }
+
+ for (i = 0; i < FIO_IO_U_LAT_U_NR; i++) {
+ p.ts.io_u_lat_u[i] = cpu_to_le32(ts->io_u_lat_u[i]);
+ p.ts.io_u_lat_m[i] = cpu_to_le32(ts->io_u_lat_m[i]);
+ }
+
+ for (i = 0; i < DDIR_RWDIR_CNT; i++)
+ for (j = 0; j < FIO_IO_U_PLAT_NR; j++)
+ p.ts.io_u_plat[i][j] = cpu_to_le32(ts->io_u_plat[i][j]);
+
+ for (i = 0; i < DDIR_RWDIR_CNT; i++) {
+ p.ts.total_io_u[i] = cpu_to_le64(ts->total_io_u[i]);
+ p.ts.short_io_u[i] = cpu_to_le64(ts->short_io_u[i]);
+ p.ts.drop_io_u[i] = cpu_to_le64(ts->drop_io_u[i]);
+ }
+
+ p.ts.total_submit = cpu_to_le64(ts->total_submit);
+ p.ts.total_complete = cpu_to_le64(ts->total_complete);
+
+ for (i = 0; i < DDIR_RWDIR_CNT; i++) {
+ p.ts.io_bytes[i] = cpu_to_le64(ts->io_bytes[i]);
+ p.ts.runtime[i] = cpu_to_le64(ts->runtime[i]);
+ }
+
+ p.ts.total_run_time = cpu_to_le64(ts->total_run_time);
+ p.ts.continue_on_error = cpu_to_le16(ts->continue_on_error);
+ p.ts.total_err_count = cpu_to_le64(ts->total_err_count);
+ p.ts.first_error = cpu_to_le32(ts->first_error);
+ p.ts.kb_base = cpu_to_le32(ts->kb_base);
+ p.ts.unit_base = cpu_to_le32(ts->unit_base);
+
+ p.ts.latency_depth = cpu_to_le32(ts->latency_depth);
+ p.ts.latency_target = cpu_to_le64(ts->latency_target);
+ p.ts.latency_window = cpu_to_le64(ts->latency_window);
+ p.ts.latency_percentile.u.i = cpu_to_le64(fio_double_to_uint64(ts->latency_percentile.u.f));
+
+ convert_gs(&p.rs, rs);
+
+ fio_net_send_cmd(server_fd, FIO_NET_CMD_TS, &p, sizeof(p), NULL, NULL);
+}
+
+void fio_server_send_gs(struct group_run_stats *rs)
+{
+ struct group_run_stats gs;
+
+ dprint(FD_NET, "server sending group run stats\n");
+
+ convert_gs(&gs, rs);
+ fio_net_send_cmd(server_fd, FIO_NET_CMD_GS, &gs, sizeof(gs), NULL, NULL);
+}
+
+static void convert_agg(struct disk_util_agg *dst, struct disk_util_agg *src)
+{
+ int i;
+
+ for (i = 0; i < 2; i++) {
+ dst->ios[i] = cpu_to_le32(src->ios[i]);
+ dst->merges[i] = cpu_to_le32(src->merges[i]);
+ dst->sectors[i] = cpu_to_le64(src->sectors[i]);
+ dst->ticks[i] = cpu_to_le32(src->ticks[i]);
+ }
+
+ dst->io_ticks = cpu_to_le32(src->io_ticks);
+ dst->time_in_queue = cpu_to_le32(src->time_in_queue);
+ dst->slavecount = cpu_to_le32(src->slavecount);
+ dst->max_util.u.i = cpu_to_le64(fio_double_to_uint64(src->max_util.u.f));
+}
+
+static void convert_dus(struct disk_util_stat *dst, struct disk_util_stat *src)
+{
+ int i;
+
+ dst->name[FIO_DU_NAME_SZ - 1] = '\0';
+ strncpy((char *) dst->name, (char *) src->name, FIO_DU_NAME_SZ - 1);
+
+ for (i = 0; i < 2; i++) {
+ dst->s.ios[i] = cpu_to_le32(src->s.ios[i]);
+ dst->s.merges[i] = cpu_to_le32(src->s.merges[i]);
+ dst->s.sectors[i] = cpu_to_le64(src->s.sectors[i]);
+ dst->s.ticks[i] = cpu_to_le32(src->s.ticks[i]);
+ }
+
+ dst->s.io_ticks = cpu_to_le32(src->s.io_ticks);
+ dst->s.time_in_queue = cpu_to_le32(src->s.time_in_queue);
+ dst->s.msec = cpu_to_le64(src->s.msec);
+}
+
+void fio_server_send_du(void)
+{
+ struct disk_util *du;
+ struct flist_head *entry;
+ struct cmd_du_pdu pdu;
+
+ dprint(FD_NET, "server: sending disk_util %d\n", !flist_empty(&disk_list));
+
+ memset(&pdu, 0, sizeof(pdu));
+
+ flist_for_each(entry, &disk_list) {
+ du = flist_entry(entry, struct disk_util, list);
+
+ convert_dus(&pdu.dus, &du->dus);
+ convert_agg(&pdu.agg, &du->agg);
+
+ fio_net_send_cmd(server_fd, FIO_NET_CMD_DU, &pdu, sizeof(pdu), NULL, NULL);
+ }
+}
+
+/*
+ * Send a command with a separate PDU, not inlined in the command
+ */
+static int fio_send_cmd_ext_pdu(int sk, uint16_t opcode, const void *buf,
+ off_t size, uint64_t tag, uint32_t flags)
+{
+ struct fio_net_cmd cmd;
+ struct iovec iov[2];
+
+ iov[0].iov_base = (void *) &cmd;
+ iov[0].iov_len = sizeof(cmd);
+ iov[1].iov_base = (void *) buf;
+ iov[1].iov_len = size;
+
+ __fio_init_net_cmd(&cmd, opcode, size, tag);
+ cmd.flags = __cpu_to_le32(flags);
+ fio_net_cmd_crc_pdu(&cmd, buf);
+
+ return fio_sendv_data(sk, iov, 2);
+}
+
+static int fio_send_iolog_gz(struct cmd_iolog_pdu *pdu, struct io_log *log)
+{
+ int ret = 0;
+#ifdef CONFIG_ZLIB
+ z_stream stream;
+ void *out_pdu;
+
+ /*
+ * Dirty - since the log is potentially huge, compress it into
+ * FIO_SERVER_MAX_FRAGMENT_PDU chunks and let the receiving
+ * side defragment it.
+ */
+ out_pdu = malloc(FIO_SERVER_MAX_FRAGMENT_PDU);
+
+ stream.zalloc = Z_NULL;
+ stream.zfree = Z_NULL;
+ stream.opaque = Z_NULL;
+
+ if (deflateInit(&stream, Z_DEFAULT_COMPRESSION) != Z_OK) {
+ ret = 1;
+ goto err;
+ }
+
+ stream.next_in = (void *) log->log;
+ stream.avail_in = log->nr_samples * log_entry_sz(log);
+
+ do {
+ unsigned int this_len, flags = 0;
+ int ret;
+
+ stream.avail_out = FIO_SERVER_MAX_FRAGMENT_PDU;
+ stream.next_out = out_pdu;
+ ret = deflate(&stream, Z_FINISH);
+ /* may be Z_OK, or Z_STREAM_END */
+ if (ret < 0)
+ goto err_zlib;
+
+ this_len = FIO_SERVER_MAX_FRAGMENT_PDU - stream.avail_out;
+
+ if (stream.avail_in)
+ flags = FIO_NET_CMD_F_MORE;
+
+ ret = fio_send_cmd_ext_pdu(server_fd, FIO_NET_CMD_IOLOG,
+ out_pdu, this_len, 0, flags);
+ if (ret)
+ goto err_zlib;
+ } while (stream.avail_in);
+
+err_zlib:
+ deflateEnd(&stream);
+err:
+ free(out_pdu);
+#endif
+ return ret;
+}
+
+int fio_send_iolog(struct thread_data *td, struct io_log *log, const char *name)
+{
+ struct cmd_iolog_pdu pdu;
+ int i, ret = 0;
+
+ pdu.nr_samples = cpu_to_le64(log->nr_samples);
+ pdu.thread_number = cpu_to_le32(td->thread_number);
+ pdu.log_type = cpu_to_le32(log->log_type);
+ pdu.compressed = cpu_to_le32(use_zlib);
+
+ strncpy((char *) pdu.name, name, FIO_NET_NAME_MAX);
+ pdu.name[FIO_NET_NAME_MAX - 1] = '\0';
+
+ for (i = 0; i < log->nr_samples; i++) {
+ struct io_sample *s = get_sample(log, i);
+
+ s->time = cpu_to_le64(s->time);
+ s->val = cpu_to_le64(s->val);
+ s->__ddir = cpu_to_le32(s->__ddir);
+ s->bs = cpu_to_le32(s->bs);
+
+ if (log->log_offset) {
+ struct io_sample_offset *so = (void *) s;
+
+ so->offset = cpu_to_le64(so->offset);
+ }
+ }
+
+ /*
+ * Send header first, it's not compressed.
+ */
+ ret = fio_send_cmd_ext_pdu(server_fd, FIO_NET_CMD_IOLOG, &pdu,
+ sizeof(pdu), 0, FIO_NET_CMD_F_MORE);
+ if (ret)
+ return ret;
+
+ /*
+ * Now send actual log, compress if we can, otherwise just plain
+ */
+ if (use_zlib)
+ return fio_send_iolog_gz(&pdu, log);
+
+ return fio_send_cmd_ext_pdu(server_fd, FIO_NET_CMD_IOLOG, log->log,
+ log->nr_samples * log_entry_sz(log), 0, 0);
+}
+
+void fio_server_send_add_job(struct thread_data *td)
+{
+ struct cmd_add_job_pdu pdu;
+
+ memset(&pdu, 0, sizeof(pdu));
+ pdu.thread_number = cpu_to_le32(td->thread_number);
+ pdu.groupid = cpu_to_le32(td->groupid);
+ convert_thread_options_to_net(&pdu.top, &td->o);
+
+ fio_net_send_cmd(server_fd, FIO_NET_CMD_ADD_JOB, &pdu, sizeof(pdu), NULL, NULL);
+}
+
+void fio_server_send_start(struct thread_data *td)
+{
+ assert(server_fd != -1);
+
+ fio_net_send_simple_cmd(server_fd, FIO_NET_CMD_SERVER_START, 0, NULL);
+}
+
+static int fio_init_server_ip(void)
+{
+ struct sockaddr *addr;
+ socklen_t socklen;
+ char buf[80];
+ const char *str;
+ int sk, opt;
+
+ if (use_ipv6)
+ sk = socket(AF_INET6, SOCK_STREAM, 0);
+ else
+ sk = socket(AF_INET, SOCK_STREAM, 0);
+
+ if (sk < 0) {
+ log_err("fio: socket: %s\n", strerror(errno));
+ return -1;
+ }
+
+ opt = 1;
+ if (setsockopt(sk, SOL_SOCKET, SO_REUSEADDR, (void *)&opt, sizeof(opt)) < 0) {
+ log_err("fio: setsockopt: %s\n", strerror(errno));
+ close(sk);
+ return -1;
+ }
+#ifdef SO_REUSEPORT
+ if (setsockopt(sk, SOL_SOCKET, SO_REUSEPORT, &opt, sizeof(opt)) < 0) {
+ log_err("fio: setsockopt: %s\n", strerror(errno));
+ close(sk);
+ return -1;
+ }
+#endif
+
+ if (use_ipv6) {
+ const void *src = &saddr_in6.sin6_addr;
+
+ addr = (struct sockaddr *) &saddr_in6;
+ socklen = sizeof(saddr_in6);
+ saddr_in6.sin6_family = AF_INET6;
+ str = inet_ntop(AF_INET6, src, buf, sizeof(buf));
+ } else {
+ const void *src = &saddr_in.sin_addr;
+
+ addr = (struct sockaddr *) &saddr_in;
+ socklen = sizeof(saddr_in);
+ saddr_in.sin_family = AF_INET;
+ str = inet_ntop(AF_INET, src, buf, sizeof(buf));
+ }
+
+ if (bind(sk, addr, socklen) < 0) {
+ log_err("fio: bind: %s\n", strerror(errno));
+ log_info("fio: failed with IPv%c %s\n", use_ipv6 ? '6' : '4', str);
+ close(sk);
+ return -1;
+ }
+
+ return sk;
+}
+
+static int fio_init_server_sock(void)
+{
+ struct sockaddr_un addr;
+ socklen_t len;
+ mode_t mode;
+ int sk;
+
+ sk = socket(AF_UNIX, SOCK_STREAM, 0);
+ if (sk < 0) {
+ log_err("fio: socket: %s\n", strerror(errno));
+ return -1;
+ }
+
+ mode = umask(000);
+
+ memset(&addr, 0, sizeof(addr));
+ addr.sun_family = AF_UNIX;
+ strncpy(addr.sun_path, bind_sock, sizeof(addr.sun_path) - 1);
+
+ len = sizeof(addr.sun_family) + strlen(bind_sock) + 1;
+
+ if (bind(sk, (struct sockaddr *) &addr, len) < 0) {
+ log_err("fio: bind: %s\n", strerror(errno));
+ close(sk);
+ return -1;
+ }
+
+ umask(mode);
+ return sk;
+}
+
+static int fio_init_server_connection(void)
+{
+ char bind_str[128];
+ int sk;
+
+ dprint(FD_NET, "starting server\n");
+
+ if (!bind_sock)
+ sk = fio_init_server_ip();
+ else
+ sk = fio_init_server_sock();
+
+ if (sk < 0)
+ return sk;
+
+ memset(bind_str, 0, sizeof(bind_str));
+
+ if (!bind_sock) {
+ char *p, port[16];
+ const void *src;
+ int af;
+
+ if (use_ipv6) {
+ af = AF_INET6;
+ src = &saddr_in6.sin6_addr;
+ } else {
+ af = AF_INET;
+ src = &saddr_in.sin_addr;
+ }
+
+ p = (char *) inet_ntop(af, src, bind_str, sizeof(bind_str));
+
+ sprintf(port, ",%u", fio_net_port);
+ if (p)
+ strcat(p, port);
+ else
+ strncpy(bind_str, port, sizeof(bind_str) - 1);
+ } else
+ strncpy(bind_str, bind_sock, sizeof(bind_str) - 1);
+
+ log_info("fio: server listening on %s\n", bind_str);
+
+ if (listen(sk, 0) < 0) {
+ log_err("fio: listen: %s\n", strerror(errno));
+ close(sk);
+ return -1;
+ }
+
+ return sk;
+}
+
+int fio_server_parse_host(const char *host, int ipv6, struct in_addr *inp,
+ struct in6_addr *inp6)
+
+{
+ int ret = 0;
+
+ if (ipv6)
+ ret = inet_pton(AF_INET6, host, inp6);
+ else
+ ret = inet_pton(AF_INET, host, inp);
+
+ if (ret != 1) {
+ struct addrinfo hints, *res;
+
+ memset(&hints, 0, sizeof(hints));
+ hints.ai_family = ipv6 ? AF_INET6 : AF_INET;
+ hints.ai_socktype = SOCK_STREAM;
+
+ ret = getaddrinfo(host, NULL, &hints, &res);
+ if (ret) {
+ log_err("fio: failed to resolve <%s> (%s)\n", host,
+ gai_strerror(ret));
+ return 1;
+ }
+
+ if (ipv6)
+ memcpy(inp6, &((struct sockaddr_in6 *) res->ai_addr)->sin6_addr, sizeof(*inp6));
+ else
+ memcpy(inp, &((struct sockaddr_in *) res->ai_addr)->sin_addr, sizeof(*inp));
+
+ ret = 1;
+ freeaddrinfo(res);
+ }
+
+ return !(ret == 1);
+}
+
+/*
+ * Parse a host/ip/port string. Reads from 'str'.
+ *
+ * Outputs:
+ *
+ * For IPv4:
+ * *ptr is the host, *port is the port, inp is the destination.
+ * For IPv6:
+ * *ptr is the host, *port is the port, inp6 is the dest, and *ipv6 is 1.
+ * For local domain sockets:
+ * *ptr is the filename, *is_sock is 1.
+ */
+int fio_server_parse_string(const char *str, char **ptr, int *is_sock,
+ int *port, struct in_addr *inp,
+ struct in6_addr *inp6, int *ipv6)
+{
+ const char *host = str;
+ char *portp;
+ int lport = 0;
+
+ *ptr = NULL;
+ *is_sock = 0;
+ *port = fio_net_port;
+ *ipv6 = 0;
+
+ if (!strncmp(str, "sock:", 5)) {
+ *ptr = strdup(str + 5);
+ *is_sock = 1;
+
+ return 0;
+ }
+
+ /*
+ * Is it ip:<ip or host>:port
+ */
+ if (!strncmp(host, "ip:", 3))
+ host += 3;
+ else if (!strncmp(host, "ip4:", 4))
+ host += 4;
+ else if (!strncmp(host, "ip6:", 4)) {
+ host += 4;
+ *ipv6 = 1;
+ } else if (host[0] == ':') {
+ /* String is :port */
+ host++;
+ lport = atoi(host);
+ if (!lport || lport > 65535) {
+ log_err("fio: bad server port %u\n", lport);
+ return 1;
+ }
+ /* no hostname given, we are done */
+ *port = lport;
+ return 0;
+ }
+
+ /*
+ * If no port seen yet, check if there's a last ',' at the end
+ */
+ if (!lport) {
+ portp = strchr(host, ',');
+ if (portp) {
+ *portp = '\0';
+ portp++;
+ lport = atoi(portp);
+ if (!lport || lport > 65535) {
+ log_err("fio: bad server port %u\n", lport);
+ return 1;
+ }
+ }
+ }
+
+ if (lport)
+ *port = lport;
+
+ if (!strlen(host))
+ return 0;
+
+ *ptr = strdup(host);
+
+ if (fio_server_parse_host(*ptr, *ipv6, inp, inp6)) {
+ free(*ptr);
+ *ptr = NULL;
+ return 1;
+ }
+
+ if (*port == 0)
+ *port = fio_net_port;
+
+ return 0;
+}
+
+/*
+ * Server arg should be one of:
+ *
+ * sock:/path/to/socket
+ * ip:1.2.3.4
+ * 1.2.3.4
+ *
+ * Where sock uses unix domain sockets, and ip binds the server to
+ * a specific interface. If no arguments are given to the server, it
+ * uses IP and binds to 0.0.0.0.
+ *
+ */
+static int fio_handle_server_arg(void)
+{
+ int port = fio_net_port;
+ int is_sock, ret = 0;
+
+ saddr_in.sin_addr.s_addr = htonl(INADDR_ANY);
+
+ if (!fio_server_arg)
+ goto out;
+
+ ret = fio_server_parse_string(fio_server_arg, &bind_sock, &is_sock,
+ &port, &saddr_in.sin_addr,
+ &saddr_in6.sin6_addr, &use_ipv6);
+
+ if (!is_sock && bind_sock) {
+ free(bind_sock);
+ bind_sock = NULL;
+ }
+
+out:
+ fio_net_port = port;
+ saddr_in.sin_port = htons(port);
+ saddr_in6.sin6_port = htons(port);
+ return ret;
+}
+
+static void sig_int(int sig)
+{
+ if (bind_sock)
+ unlink(bind_sock);
+}
+
+static void set_sig_handlers(void)
+{
+ struct sigaction act;
+
+ memset(&act, 0, sizeof(act));
+ act.sa_handler = sig_int;
+ act.sa_flags = SA_RESTART;
+ sigaction(SIGINT, &act, NULL);
+}
+
+static int fio_server(void)
+{
+ int sk, ret;
+
+ dprint(FD_NET, "starting server\n");
+
+ if (fio_handle_server_arg())
+ return -1;
+
+ sk = fio_init_server_connection();
+ if (sk < 0)
+ return -1;
+
+ set_sig_handlers();
+
+ ret = accept_loop(sk);
+
+ close(sk);
+
+ if (fio_server_arg) {
+ free(fio_server_arg);
+ fio_server_arg = NULL;
+ }
+ if (bind_sock)
+ free(bind_sock);
+
+ return ret;
+}
+
+void fio_server_got_signal(int signal)
+{
+ if (signal == SIGPIPE)
+ server_fd = -1;
+ else {
+ log_info("\nfio: terminating on signal %d\n", signal);
+ exit_backend = 1;
+ }
+}
+
+static int check_existing_pidfile(const char *pidfile)
+{
+ struct stat sb;
+ char buf[16];
+ pid_t pid;
+ FILE *f;
+
+ if (stat(pidfile, &sb))
+ return 0;
+
+ f = fopen(pidfile, "r");
+ if (!f)
+ return 0;
+
+ if (fread(buf, sb.st_size, 1, f) <= 0) {
+ fclose(f);
+ return 1;
+ }
+ fclose(f);
+
+ pid = atoi(buf);
+ if (kill(pid, SIGCONT) < 0)
+ return errno != ESRCH;
+
+ return 1;
+}
+
+static int write_pid(pid_t pid, const char *pidfile)
+{
+ FILE *fpid;
+
+ fpid = fopen(pidfile, "w");
+ if (!fpid) {
+ log_err("fio: failed opening pid file %s\n", pidfile);
+ return 1;
+ }
+
+ fprintf(fpid, "%u\n", (unsigned int) pid);
+ fclose(fpid);
+ return 0;
+}
+
+/*
+ * If pidfile is specified, background us.
+ */
+int fio_start_server(char *pidfile)
+{
+ pid_t pid;
+ int ret;
+
+#if defined(WIN32)
+ WSADATA wsd;
+ WSAStartup(MAKEWORD(2, 2), &wsd);
+#endif
+
+ if (!pidfile)
+ return fio_server();
+
+ if (check_existing_pidfile(pidfile)) {
+ log_err("fio: pidfile %s exists and server appears alive\n",
+ pidfile);
+ free(pidfile);
+ return -1;
+ }
+
+ pid = fork();
+ if (pid < 0) {
+ log_err("fio: failed server fork: %s", strerror(errno));
+ free(pidfile);
+ return -1;
+ } else if (pid) {
+ int ret = write_pid(pid, pidfile);
+
+ free(pidfile);
+ _exit(ret);
+ }
+
+ setsid();
+ openlog("fio", LOG_NDELAY|LOG_NOWAIT|LOG_PID, LOG_USER);
+ log_syslog = 1;
+ close(STDIN_FILENO);
+ close(STDOUT_FILENO);
+ close(STDERR_FILENO);
+ f_out = NULL;
+ f_err = NULL;
+
+ ret = fio_server();
+
+ closelog();
+ unlink(pidfile);
+ free(pidfile);
+ return ret;
+}
+
+void fio_server_set_arg(const char *arg)
+{
+ fio_server_arg = strdup(arg);