diff options
Diffstat (limited to 'usr.sbin/nvmfd/nvmfd.c')
| -rw-r--r-- | usr.sbin/nvmfd/nvmfd.c | 260 |
1 files changed, 260 insertions, 0 deletions
diff --git a/usr.sbin/nvmfd/nvmfd.c b/usr.sbin/nvmfd/nvmfd.c new file mode 100644 index 000000000000..6fce21b07b74 --- /dev/null +++ b/usr.sbin/nvmfd/nvmfd.c @@ -0,0 +1,260 @@ +/*- + * SPDX-License-Identifier: BSD-2-Clause + * + * Copyright (c) 2023-2024 Chelsio Communications, Inc. + * Written by: John Baldwin <jhb@FreeBSD.org> + */ + +#include <sys/param.h> +#include <sys/event.h> +#include <sys/linker.h> +#include <sys/module.h> +#include <sys/socket.h> +#include <netinet/in.h> +#include <assert.h> +#include <err.h> +#include <errno.h> +#include <libnvmf.h> +#include <libutil.h> +#include <netdb.h> +#include <signal.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> + +#include "internal.h" + +bool data_digests = false; +bool header_digests = false; +bool flow_control_disable = false; +bool kernel_io = false; + +static const char *subnqn; +static volatile bool quit = false; + +static void +usage(void) +{ + fprintf(stderr, "nvmfd -K [-FGg] [-P port] [-p port] [-t transport] [-n subnqn]\n" + "nvmfd [-dDFH] [-P port] [-p port] [-t transport] [-n subnqn]\n" + "\tdevice [device [...]]\n" + "\n" + "Devices use one of the following syntaxes:\n" + "\tpathame - file or disk device\n" + "\tramdisk:size - memory disk of given size\n"); + exit(1); +} + +static void +handle_sig(int sig __unused) +{ + quit = true; +} + +static void +register_listen_socket(int kqfd, int s, void *udata) +{ + struct kevent kev; + + if (listen(s, -1) != 0) + err(1, "listen"); + + EV_SET(&kev, s, EVFILT_READ, EV_ADD, 0, 0, udata); + if (kevent(kqfd, &kev, 1, NULL, 0, NULL) == -1) + err(1, "kevent: failed to add listen socket"); +} + +static void +create_passive_sockets(int kqfd, const char *port, bool discovery) +{ + struct addrinfo hints, *ai, *list; + bool created; + int error, s; + + memset(&hints, 0, sizeof(hints)); + hints.ai_flags = AI_PASSIVE; + hints.ai_family = AF_UNSPEC; + hints.ai_protocol = IPPROTO_TCP; + error = getaddrinfo(NULL, port, &hints, &list); + if (error != 0) + errx(1, "%s", gai_strerror(error)); + created = false; + + for (ai = list; ai != NULL; ai = ai->ai_next) { + s = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol); + if (s == -1) + continue; + + if (bind(s, ai->ai_addr, ai->ai_addrlen) != 0) { + close(s); + continue; + } + + if (discovery) { + register_listen_socket(kqfd, s, (void *)1); + } else { + register_listen_socket(kqfd, s, (void *)2); + discovery_add_io_controller(s, subnqn); + } + created = true; + } + + freeaddrinfo(list); + if (!created) + err(1, "Failed to create any listen sockets"); +} + +static void +handle_connections(int kqfd) +{ + struct kevent ev; + int s; + + signal(SIGHUP, handle_sig); + signal(SIGINT, handle_sig); + signal(SIGQUIT, handle_sig); + signal(SIGTERM, handle_sig); + + while (!quit) { + if (kevent(kqfd, NULL, 0, &ev, 1, NULL) == -1) { + if (errno == EINTR) + continue; + err(1, "kevent"); + } + + assert(ev.filter == EVFILT_READ); + + s = accept(ev.ident, NULL, NULL); + if (s == -1) { + warn("accept"); + continue; + } + + switch ((uintptr_t)ev.udata) { + case 1: + handle_discovery_socket(s); + break; + case 2: + handle_io_socket(s); + break; + default: + __builtin_unreachable(); + } + } +} + +int +main(int ac, char **av) +{ + struct pidfh *pfh; + const char *dport, *ioport, *transport; + pid_t pid; + int ch, error, kqfd; + bool daemonize; + static char nqn[NVMF_NQN_MAX_LEN]; + + /* 7.4.9.3 Default port for discovery */ + dport = "8009"; + + pfh = NULL; + daemonize = true; + ioport = "0"; + subnqn = NULL; + transport = "tcp"; + while ((ch = getopt(ac, av, "dFgGKn:P:p:t:")) != -1) { + switch (ch) { + case 'd': + daemonize = false; + break; + case 'F': + flow_control_disable = true; + break; + case 'G': + data_digests = true; + break; + case 'g': + header_digests = true; + break; + case 'K': + kernel_io = true; + break; + case 'n': + subnqn = optarg; + break; + case 'P': + dport = optarg; + break; + case 'p': + ioport = optarg; + break; + case 't': + transport = optarg; + break; + default: + usage(); + } + } + + av += optind; + ac -= optind; + + if (kernel_io) { + if (ac > 0) + usage(); + if (modfind("nvmft") == -1 && kldload("nvmft") == -1) + warn("couldn't load nvmft"); + } else { + if (ac < 1) + usage(); + } + + if (strcasecmp(transport, "tcp") == 0) { + } else + errx(1, "Invalid transport %s", transport); + + if (subnqn == NULL) { + error = nvmf_nqn_from_hostuuid(nqn); + if (error != 0) + errc(1, error, "Failed to generate NQN"); + subnqn = nqn; + } + + if (!kernel_io) + register_devices(ac, av); + + init_discovery(); + init_io(subnqn); + + if (daemonize) { + pfh = pidfile_open(NULL, 0600, &pid); + if (pfh == NULL) { + if (errno == EEXIST) + errx(1, "Daemon already running, pid: %jd", + (intmax_t)pid); + warn("Cannot open or create pidfile"); + } + + if (daemon(0, 0) != 0) { + pidfile_remove(pfh); + err(1, "Failed to fork into the background"); + } + + pidfile_write(pfh); + } + + kqfd = kqueue(); + if (kqfd == -1) { + pidfile_remove(pfh); + err(1, "kqueue"); + } + + create_passive_sockets(kqfd, dport, true); + create_passive_sockets(kqfd, ioport, false); + + handle_connections(kqfd); + shutdown_io(); + if (pfh != NULL) + pidfile_remove(pfh); + return (0); +} |