X-Git-Url: https://git.kernel.dk/?p=fio.git;a=blobdiff_plain;f=server.c;h=ad07a0e973e9b0ea6c813bad37dfe2b0c21d1012;hp=d9aff01c978a3a8701d51d429d48189f46f6d653;hb=df380934e53c645b4b7cdec882b512b4d20ebc14;hpb=81179eec4a84ff25c190a8a6a685b0b3b4dd2a37 diff --git a/server.c b/server.c index d9aff01c..ad07a0e9 100644 --- a/server.c +++ b/server.c @@ -8,21 +8,57 @@ #include #include #include -#include +#include +#include +#include #include #include #include #include +#include #include "fio.h" #include "server.h" #include "crc/crc16.h" +#include "ieee754.h" + +#include "fio_version.h" int fio_net_port = 8765; int exit_backend = 0; static int server_fd = -1; +static char *fio_server_arg; +static char *bind_sock; +static struct sockaddr_in saddr_in; + +static const char *fio_server_ops[FIO_NET_CMD_NR] = { + "", + "QUIT", + "EXIT", + "JOB", + "JOBLINE", + "TEXT", + "TS", + "GS", + "SEND_ETA", + "ETA", + "PROBE", + "START", + "STOP" +}; + +const char *fio_server_op(unsigned int op) +{ + static char buf[32]; + + if (op < FIO_NET_CMD_NR) + return fio_server_ops[op]; + + sprintf(buf, "UNKNOWN/%d", op); + return buf; +} int fio_send_data(int sk, const void *p, unsigned int len) { @@ -41,6 +77,8 @@ int fio_send_data(int sk, const void *p, unsigned int len) break; else if (errno == EAGAIN || errno == EINTR) continue; + else + break; } while (!exit_backend); if (!len) @@ -64,6 +102,8 @@ int fio_recv_data(int sk, void *p, unsigned int len) break; else if (errno == EAGAIN || errno == EINTR) continue; + else + break; } while (!exit_backend); if (!len) @@ -89,11 +129,11 @@ static int verify_convert_cmd(struct fio_net_cmd *cmd) cmd->version = le16_to_cpu(cmd->version); cmd->opcode = le16_to_cpu(cmd->opcode); cmd->flags = le32_to_cpu(cmd->flags); - cmd->serial = le64_to_cpu(cmd->serial); + cmd->tag = le64_to_cpu(cmd->tag); cmd->pdu_len = le32_to_cpu(cmd->pdu_len); switch (cmd->version) { - case FIO_SERVER_VER1: + case FIO_SERVER_VER: break; default: log_err("fio: bad server cmd version %d\n", cmd->version); @@ -111,7 +151,7 @@ static int verify_convert_cmd(struct fio_net_cmd *cmd) /* * Read (and defragment, if necessary) incoming commands */ -struct fio_net_cmd *fio_net_recv_cmd(int sk, int block) +struct fio_net_cmd *fio_net_recv_cmd(int sk) { struct fio_net_cmd cmd, *cmdret = NULL; size_t cmd_size = 0, pdu_offset = 0; @@ -120,37 +160,6 @@ struct fio_net_cmd *fio_net_recv_cmd(int sk, int block) void *pdu = NULL; do { - struct pollfd pfd; - - pfd.fd = sk; - pfd.events = POLLIN; - ret = 0; - do { - int timeo = block ? 100 : 10; - - ret = poll(&pfd, 1, timeo); - if (ret < 0) { - if (errno == EINTR) - break; - log_err("fio: poll: %s\n", strerror(errno)); - break; - } else if (!ret) { - if (!block) - return NULL; - continue; - } - - if (pfd.revents & POLLIN) - break; - if (pfd.revents & (POLLERR|POLLHUP)) { - ret = 1; - break; - } - } while (ret >= 0 && block); - - if (ret < 0) - break; - ret = fio_recv_data(sk, &cmd, sizeof(cmd)); if (ret) break; @@ -227,10 +236,11 @@ void fio_net_cmd_crc(struct fio_net_cmd *cmd) cmd->pdu_crc16 = __cpu_to_le16(crc16(cmd->payload, pdu_len)); } -int fio_net_send_cmd(int fd, uint16_t opcode, const void *buf, off_t size) +int fio_net_send_cmd(int fd, uint16_t opcode, const void *buf, off_t size, + uint64_t tag) { - struct fio_net_cmd *cmd; - size_t this_len; + struct fio_net_cmd *cmd = NULL; + size_t this_len, cur_len = 0; int ret; do { @@ -238,9 +248,15 @@ int fio_net_send_cmd(int fd, uint16_t opcode, const void *buf, off_t size) if (this_len > FIO_SERVER_MAX_PDU) this_len = FIO_SERVER_MAX_PDU; - cmd = malloc(sizeof(*cmd) + this_len); + if (!cmd || cur_len < sizeof(*cmd) + this_len) { + if (cmd) + free(cmd); + + cur_len = sizeof(*cmd) + this_len; + cmd = malloc(cur_len); + } - fio_init_net_cmd(cmd, opcode, buf, this_len); + fio_init_net_cmd(cmd, opcode, buf, this_len, tag); if (this_len < size) cmd->flags = __cpu_to_le32(FIO_NET_CMD_F_MORE); @@ -248,31 +264,62 @@ int fio_net_send_cmd(int fd, uint16_t opcode, const void *buf, off_t size) fio_net_cmd_crc(cmd); ret = fio_send_data(fd, cmd, sizeof(*cmd) + this_len); - free(cmd); size -= this_len; buf += this_len; } while (!ret && size); + if (cmd) + free(cmd); + return ret; } -int fio_net_send_simple_cmd(int sk, uint16_t opcode, uint64_t serial) +static int fio_net_send_simple_stack_cmd(int sk, uint16_t opcode, uint64_t tag) { - struct fio_net_cmd cmd = { - .version = __cpu_to_le16(FIO_SERVER_VER1), - .opcode = cpu_to_le16(opcode), - .serial = cpu_to_le64(serial), - }; + struct fio_net_cmd cmd; + fio_init_net_cmd(&cmd, opcode, NULL, 0, tag); fio_net_cmd_crc(&cmd); return fio_send_data(sk, &cmd, sizeof(cmd)); } -static int send_quit_command(void) +/* + * If 'list' is non-NULL, then allocate and store the sent command for + * later verification. + */ +int fio_net_send_simple_cmd(int sk, uint16_t opcode, uint64_t tag, + struct flist_head *list) +{ + struct fio_net_int_cmd *cmd; + int ret; + + if (!list) + return fio_net_send_simple_stack_cmd(sk, opcode, tag); + + cmd = malloc(sizeof(*cmd)); + + fio_init_net_cmd(&cmd->cmd, opcode, NULL, 0, (uintptr_t) cmd); + fio_net_cmd_crc(&cmd->cmd); + + INIT_FLIST_HEAD(&cmd->list); + gettimeofday(&cmd->tv, NULL); + cmd->saved_tag = tag; + + ret = fio_send_data(sk, &cmd->cmd, sizeof(cmd->cmd)); + if (ret) { + free(cmd); + return ret; + } + + flist_add_tail(&cmd->list, list); + return 0; +} + +static int fio_server_send_quit_cmd(void) { dprint(FD_NET, "server: sending quit\n"); - return fio_net_send_simple_cmd(server_fd, FIO_NET_CMD_QUIT, 0); + return fio_net_send_simple_cmd(server_fd, FIO_NET_CMD_QUIT, 0, NULL); } static int handle_job_cmd(struct fio_net_cmd *cmd) @@ -280,35 +327,55 @@ static int handle_job_cmd(struct fio_net_cmd *cmd) char *buf = (char *) cmd->payload; int ret; - if (parse_jobs_ini(buf, 1, 0)) + if (parse_jobs_ini(buf, 1, 0)) { + fio_server_send_quit_cmd(); return -1; + } - fio_net_send_simple_cmd(server_fd, FIO_NET_CMD_START, 0); + fio_net_send_simple_cmd(server_fd, FIO_NET_CMD_START, 0, NULL); ret = exec_run(); - send_quit_command(); + fio_server_send_quit_cmd(); reset_fio_state(); return ret; } static int handle_jobline_cmd(struct fio_net_cmd *cmd) { - struct cmd_line_pdu *pdu = (struct cmd_line_pdu *) cmd->payload; - char *argv[FIO_NET_CMD_JOBLINE_ARGV]; + void *pdu = cmd->payload; + struct cmd_single_line_pdu *cslp; + struct cmd_line_pdu *clp; + unsigned long offset; + char **argv; int ret, i; - pdu->argc = le16_to_cpu(pdu->argc); + clp = pdu; + clp->lines = le16_to_cpu(clp->lines); + argv = malloc(clp->lines * sizeof(char *)); + offset = sizeof(*clp); - for (i = 0; i < pdu->argc; i++) - argv[i] = (char *) pdu->argv[i]; + dprint(FD_NET, "server: %d command line args\n", clp->lines); - if (parse_cmd_line(pdu->argc, argv)) + for (i = 0; i < clp->lines; i++) { + cslp = pdu + offset; + argv[i] = (char *) cslp->text; + + offset += sizeof(*cslp) + le16_to_cpu(cslp->len); + dprint(FD_NET, "server: %d: %s\n", i, argv[i]); + } + + if (parse_cmd_line(clp->lines, argv)) { + fio_server_send_quit_cmd(); + free(argv); return -1; + } - fio_net_send_simple_cmd(server_fd, FIO_NET_CMD_START, 0); + free(argv); + + fio_net_send_simple_cmd(server_fd, FIO_NET_CMD_START, 0, NULL); ret = exec_run(); - send_quit_command(); + fio_server_send_quit_cmd(); reset_fio_state(); return ret; } @@ -317,20 +384,68 @@ static int handle_probe_cmd(struct fio_net_cmd *cmd) { struct cmd_probe_pdu probe; + dprint(FD_NET, "server: sending probe reply\n"); + memset(&probe, 0, sizeof(probe)); gethostname((char *) probe.hostname, sizeof(probe.hostname)); +#ifdef FIO_BIG_ENDIAN + probe.bigendian = 1; +#endif probe.fio_major = FIO_MAJOR; probe.fio_minor = FIO_MINOR; probe.fio_patch = FIO_PATCH; - return fio_net_send_cmd(server_fd, FIO_NET_CMD_PROBE, &probe, sizeof(probe)); + probe.os = FIO_OS; + probe.arch = FIO_ARCH; + + return fio_net_send_cmd(server_fd, FIO_NET_CMD_PROBE, &probe, sizeof(probe), cmd->tag); +} + +static int handle_send_eta_cmd(struct fio_net_cmd *cmd) +{ + struct jobs_eta *je; + size_t size; + int i; + + size = sizeof(*je) + thread_number * sizeof(char); + je = malloc(size); + memset(je, 0, size); + + if (!calc_thread_status(je, 1)) { + free(je); + return 0; + } + + dprint(FD_NET, "server sending status\n"); + + je->nr_running = cpu_to_le32(je->nr_running); + je->nr_ramp = cpu_to_le32(je->nr_ramp); + je->nr_pending = cpu_to_le32(je->nr_pending); + je->files_open = cpu_to_le32(je->files_open); + je->m_rate = cpu_to_le32(je->m_rate); + je->t_rate = cpu_to_le32(je->t_rate); + je->m_iops = cpu_to_le32(je->m_iops); + je->t_iops = cpu_to_le32(je->t_iops); + + for (i = 0; i < 2; i++) { + je->rate[i] = cpu_to_le32(je->rate[i]); + je->iops[i] = cpu_to_le32(je->iops[i]); + } + + je->elapsed_sec = cpu_to_le32(je->nr_running); + je->eta_sec = cpu_to_le64(je->eta_sec); + + fio_net_send_cmd(server_fd, FIO_NET_CMD_ETA, je, size, cmd->tag); + free(je); + return 0; } static int handle_command(struct fio_net_cmd *cmd) { int ret; - dprint(FD_NET, "server: got opcode %d\n", cmd->opcode); + dprint(FD_NET, "server: got op [%s], pdu=%u, tag=%lx\n", + fio_server_op(cmd->opcode), cmd->pdu_len, cmd->tag); switch (cmd->opcode) { case FIO_NET_CMD_QUIT: @@ -348,8 +463,11 @@ static int handle_command(struct fio_net_cmd *cmd) case FIO_NET_CMD_PROBE: ret = handle_probe_cmd(cmd); break; + case FIO_NET_CMD_SEND_ETA: + ret = handle_send_eta_cmd(cmd); + break; default: - log_err("fio: unknown opcode: %d\n", cmd->opcode); + log_err("fio: unknown opcode: %s\n",fio_server_op(cmd->opcode)); ret = 1; } @@ -363,7 +481,37 @@ static int handle_connection(int sk, int block) /* read forever */ while (!exit_backend) { - cmd = fio_net_recv_cmd(sk, block); + struct pollfd pfd = { + .fd = sk, + .events = POLLIN, + }; + + ret = 0; + do { + ret = poll(&pfd, 1, 100); + if (ret < 0) { + if (errno == EINTR) + break; + log_err("fio: poll: %s\n", strerror(errno)); + break; + } else if (!ret) { + if (!block) + return 0; + continue; + } + + if (pfd.revents & POLLIN) + break; + if (pfd.revents & (POLLERR|POLLHUP)) { + ret = 1; + break; + } + } while (!exit_backend); + + if (ret < 0) + break; + + cmd = fio_net_recv_cmd(sk); if (!cmd) { ret = -1; break; @@ -391,11 +539,13 @@ void fio_server_idle_loop(void) static int accept_loop(int listen_sk) { - struct sockaddr addr; - unsigned int len = sizeof(addr); + struct sockaddr_in addr; + fio_socklen_t len = sizeof(addr); struct pollfd pfd; int ret, sk, flags, exitval = 0; + dprint(FD_NET, "server enter accept loop\n"); + flags = fcntl(listen_sk, F_GETFL); flags |= O_NONBLOCK; fcntl(listen_sk, F_SETFL, flags); @@ -419,13 +569,13 @@ again: if (exit_backend) goto out; - sk = accept(listen_sk, &addr, &len); + sk = accept(listen_sk, (struct sockaddr *) &addr, &len); if (sk < 0) { log_err("fio: accept: %s\n", strerror(errno)); return -1; } - dprint(FD_NET, "server got a connection\n"); + dprint(FD_NET, "server: connect from %s\n", inet_ntoa(addr.sin_addr)); server_fd = sk; @@ -441,12 +591,12 @@ out: return exitval; } -int fio_server_text_output(const char *buf, unsigned int len) +int fio_server_text_output(const char *buf, size_t len) { if (server_fd != -1) - return fio_net_send_cmd(server_fd, FIO_NET_CMD_TEXT, buf, len); + return fio_net_send_cmd(server_fd, FIO_NET_CMD_TEXT, buf, len, 0); - return 0; + return log_local_buf(buf, len); } static void convert_io_stat(struct io_stat *dst, struct io_stat *src) @@ -454,9 +604,12 @@ 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); - /* FIXME */ - dst->mean = __cpu_to_le64(src->mean); - dst->S = __cpu_to_le64(src->S); + + /* + * 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) @@ -485,6 +638,8 @@ 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)); strcpy(p.ts.name, ts->name); @@ -509,7 +664,12 @@ void fio_server_send_ts(struct thread_stat *ts, struct group_run_stats *rs) 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); - p.ts.percentile_list = NULL; + + for (i = 0; i < FIO_IO_U_LIST_MAX_LEN; i++) { + fio_fp64_t *fp = &p.ts.percentile_list[i]; + + fp->u.i = __cpu_to_le64(fio_double_to_uint64(fp->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]); @@ -547,53 +707,17 @@ void fio_server_send_ts(struct thread_stat *ts, struct group_run_stats *rs) convert_gs(&p.rs, rs); - fio_net_send_cmd(server_fd, FIO_NET_CMD_TS, &p, sizeof(p)); + fio_net_send_cmd(server_fd, FIO_NET_CMD_TS, &p, sizeof(p), 0); } void fio_server_send_gs(struct group_run_stats *rs) { struct group_run_stats gs; - convert_gs(&gs, rs); - fio_net_send_cmd(server_fd, FIO_NET_CMD_GS, &gs, sizeof(gs)); -} - -void fio_server_send_status(void) -{ - struct jobs_eta *je; - size_t size; - void *buf; - int i; - - size = sizeof(*je) + thread_number * sizeof(char); - buf = malloc(size); - memset(buf, 0, size); - je = buf; - - if (!calc_thread_status(je)) { - free(je); - return; - } - - je->nr_running = cpu_to_le32(je->nr_running); - je->nr_ramp = cpu_to_le32(je->nr_ramp); - je->nr_pending = cpu_to_le32(je->nr_pending); - je->files_open = cpu_to_le32(je->files_open); - je->m_rate = cpu_to_le32(je->m_rate); - je->t_rate = cpu_to_le32(je->t_rate); - je->m_iops = cpu_to_le32(je->m_iops); - je->t_iops = cpu_to_le32(je->t_iops); - - for (i = 0; i < 2; i++) { - je->rate[i] = cpu_to_le32(je->rate[i]); - je->iops[i] = cpu_to_le32(je->iops[i]); - } + dprint(FD_NET, "server sending group run stats\n"); - je->elapsed_sec = cpu_to_le32(je->nr_running); - je->eta_sec = cpu_to_le64(je->eta_sec); - - fio_net_send_cmd(server_fd, FIO_NET_CMD_ETA, buf, size); - free(je); + convert_gs(&gs, rs); + fio_net_send_cmd(server_fd, FIO_NET_CMD_GS, &gs, sizeof(gs), 0); } int fio_server_log(const char *format, ...) @@ -602,6 +726,8 @@ int fio_server_log(const char *format, ...) va_list args; size_t len; + dprint(FD_NET, "server log\n"); + va_start(args, format); len = vsnprintf(buffer, sizeof(buffer), format, args); va_end(args); @@ -609,14 +735,9 @@ int fio_server_log(const char *format, ...) return fio_server_text_output(buffer, len); } -static int fio_server(void) +static int fio_init_server_ip(void) { - struct sockaddr_in saddr_in; - struct sockaddr addr; - unsigned int len; - int sk, opt, ret; - - dprint(FD_NET, "starting server\n"); + int sk, opt; sk = socket(AF_INET, SOCK_STREAM, 0); if (sk < 0) { @@ -627,61 +748,325 @@ static int fio_server(void) opt = 1; if (setsockopt(sk, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)) < 0) { log_err("fio: setsockopt: %s\n", strerror(errno)); + close(sk); return -1; } #ifdef SO_REUSEPORT - if (setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &opt, sizeof(opt)) < 0) { + if (setsockopt(sk, SOL_SOCKET, SO_REUSEPORT, &opt, sizeof(opt)) < 0) { log_err("fio: setsockopt: %s\n", strerror(errno)); + close(sk); return -1; } #endif saddr_in.sin_family = AF_INET; - saddr_in.sin_addr.s_addr = htonl(INADDR_ANY); - saddr_in.sin_port = htons(fio_net_port); if (bind(sk, (struct sockaddr *) &saddr_in, sizeof(saddr_in)) < 0) { log_err("fio: bind: %s\n", strerror(errno)); + close(sk); return -1; } - if (listen(sk, 1) < 0) { - log_err("fio: listen: %s\n", strerror(errno)); + return sk; +} + +static int fio_init_server_sock(void) +{ + struct sockaddr_un addr; + fio_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; } - len = sizeof(addr); - if (getsockname(sk, &addr, &len) < 0) { - log_err("fio: getsockname: %s\n", strerror(errno)); + mode = umask(000); + + memset(&addr, 0, sizeof(addr)); + addr.sun_family = AF_UNIX; + strcpy(addr.sun_path, bind_sock); + unlink(bind_sock); + + 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; + + if (!bind_sock) + sprintf(bind_str, "%s:%u", inet_ntoa(saddr_in.sin_addr), fio_net_port); + else + strcpy(bind_str, bind_sock); + + log_info("fio: server listening on %s\n", bind_str); + + if (listen(sk, 0) < 0) { + log_err("fio: listen: %s\n", strerror(errno)); + return -1; + } + + return sk; +} + +int fio_server_parse_string(const char *str, char **ptr, int *is_sock, + int *port, struct in_addr *inp) +{ + *ptr = NULL; + *is_sock = 0; + *port = fio_net_port; + + if (!strncmp(str, "sock:", 5)) { + *ptr = strdup(str + 5); + *is_sock = 1; + } else { + const char *host = str; + char *portp; + int lport = 0; + + /* + * Is it ip::port + */ + if (!strncmp(host, "ip:", 3)) + host += 3; + else if (host[0] == ':') { + /* String is :port */ + host++; + lport = atoi(host); + if (!lport || lport > 65535) { + log_err("fio: bad server port %u\n", port); + 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", port); + return 1; + } + } + } + + if (lport) + *port = lport; + + *ptr = strdup(host); + + if (inet_aton(host, inp) != 1) { + struct hostent *hent; + + hent = gethostbyname(host); + if (!hent) { + free(*ptr); + *ptr = NULL; + return 1; + } + + memcpy(inp, hent->h_addr, 4); + } + } + + 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); + + if (!is_sock && bind_sock) { + free(bind_sock); + bind_sock = NULL; + } + +out: + fio_net_port = port; + saddr_in.sin_port = htons(port); + return ret; +} + +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; + 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; } -int fio_start_server(int daemonize) +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 (!daemonize) + 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 (!pidfile) return fio_server(); - openlog("fio", LOG_NDELAY|LOG_NOWAIT|LOG_PID, LOG_USER); + if (check_existing_pidfile(pidfile)) { + log_err("fio: pidfile %s exists and server appears alive\n", + pidfile); + return -1; + } + pid = fork(); if (pid < 0) { - syslog(LOG_ERR, "failed server fork"); + log_err("fio: failed server fork: %s", strerror(errno)); + free(pidfile); return -1; - } else if (pid) - exit(0); + } else if (pid) { + int ret = write_pid(pid, 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; - log_syslog = 1; - return fio_server(); + + ret = fio_server(); + + closelog(); + unlink(pidfile); + free(pidfile); + return ret; +} + +void fio_server_set_arg(const char *arg) +{ + fio_server_arg = strdup(arg); }