diff --git a/src/config.c b/src/config.c index b118516..4f978c6 100644 --- a/src/config.c +++ b/src/config.c @@ -1,409 +1,426 @@ /* * Copyright (C) 2011 Jiaju Zhang * Copyright (C) 2013 Philipp Marek * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This software is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include #include #include +#include #include #include #include "booth.h" #include "config.h" #include "ticket.h" #include "log.h" static int ticket_size = 0; static int ticket_realloc(void) { void *p; booth_conf = realloc(booth_conf, sizeof(struct booth_config) + (ticket_size + TICKET_ALLOC) * sizeof(struct ticket_config)); if (!booth_conf) { log_error("can't alloc more booth config"); return -ENOMEM; } p = (char *) booth_conf + sizeof(struct booth_config) + ticket_size * sizeof(struct ticket_config); memset(p, 0, TICKET_ALLOC * sizeof(struct ticket_config)); ticket_size += TICKET_ALLOC; return 0; } int add_node(char *address, int type); int add_node(char *addr_string, int type) { int rv; struct booth_node *node; + uLong nid; + uint32_t mask; + rv = 1; if (booth_conf->node_count == MAX_NODES) { log_error("too many nodes"); goto out; } if (strlen(addr_string)+1 >= sizeof(booth_conf->node[0].addr_string)) { log_error("node address \"%s\" too long", addr_string); goto out; } node = booth_conf->node + booth_conf->node_count; node->family = BOOTH_PROTO_FAMILY; node->type = type; /* Make nodeid start at a non-zero point. * Perhaps use hash over string or address? */ - node->nodeid = booth_conf->node_count * 0x11 + 0x98989011; strcpy(node->addr_string, addr_string); + + nid = crc32(0L, NULL, 0); + /* booth_config() uses memset(), so sizeof() is guaranteed to give + * the same result everywhere - no uninitialized bytes. */ + node->nodeid = crc32(nid, node->addr_string, + sizeof(node->addr_string)); + /* Make sure we will never collide with NO_OWNER, + * or be negative (to get "get_local_id() < 0" working). */ + mask = 1 << (sizeof(node->nodeid)*4 -1); + assert(NO_OWNER & mask); + assert(NO_OWNER >= 0); + node->nodeid &= ~mask; + + node->tcp_fd = -1; booth_conf->node_count++; rv = 0; memset(&node->sa6, 0, sizeof(node->sa6)); if (inet_pton(AF_INET, node->addr_string, &node->sa4.sin_addr) > 0) { node->family = AF_INET; node->sa4.sin_family = node->family; node->sa4.sin_port = htons(booth_conf->port); node->saddrlen = sizeof(node->sa4); node->addrlen = sizeof(node->sa4.sin_addr); } else if (inet_pton(AF_INET6, node->addr_string, &node->sa6.sin6_addr) > 0) { node->family = AF_INET6; node->sa6.sin6_family = node->family; node->sa6.sin6_flowinfo = 0; node->sa6.sin6_port = htons(booth_conf->port); node->saddrlen = sizeof(node->sa6); node->addrlen = sizeof(node->sa6.sin6_addr); } else { log_error("Address string \"%s\" is bad", node->addr_string); rv = EINVAL; } out: return rv; } inline static char *skip_while(char *cp, int (*fn)(int)) { while (fn(*cp)) cp++; return cp; } inline static char *skip_until(char *cp, char expected) { while (*cp && *cp != expected) cp++; return cp; } static inline int is_end_of_line(char *cp) { char c = *cp; return c == '\n' || c == 0 || c == '#'; } int read_config(const char *path) { char line[1024]; FILE *fp; char *s, *key, *val, *expiry, *weight, *c, *end_of_key; const char *cp, *error; int i; int lineno = 0; int got_transport = 0; fp = fopen(path, "r"); if (!fp) { log_error("failed to open %s: %s", path, strerror(errno)); return -1; } booth_conf = malloc(sizeof(struct booth_config) + TICKET_ALLOC * sizeof(struct ticket_config)); if (!booth_conf) { log_error("failed to alloc memory for booth config"); return -ENOMEM; } memset(booth_conf, 0, sizeof(struct booth_config) + TICKET_ALLOC * sizeof(struct ticket_config)); ticket_size = TICKET_ALLOC; booth_conf->proto = UDP; log_debug("reading config file %s", path); while (fgets(line, sizeof(line), fp)) { lineno++; s = skip_while(line, isspace); if (is_end_of_line(s)) continue; key = s; /* Key */ end_of_key = skip_while(key, isalnum); if (end_of_key == key) { error = "No key"; goto err; } if (!*end_of_key) goto exp_equal; /* whitespace, and something else but nothing more? */ s = skip_while(end_of_key, isspace); if (*s != '=') { exp_equal: error = "Expected '=' after key"; goto err; } s++; /* It's my buffer, and I terminate if I want to. */ /* But not earlier than that, because we had to check for = */ *end_of_key = 0; /* Value tokenizing */ s = skip_while(s, isspace); switch (*s) { case '"': case '\'': val = s+1; s = skip_until(val, *s); /* Terminate value */ if (!*s) { error = "Unterminated quoted string"; goto err; } /* Remove and skip quote */ *s = 0; s++; if (* skip_while(s, isspace)) { error = "Surplus data after value"; goto err; } *s = 0; break; case 0: no_value: error = "No value"; goto err; break; default: val = s; /* Rest of line. */ i = strlen(s); /* i > 0 because of "case 0" above. */ while (i > 0 && isspace(s[i-1])) i--; s += i; *s = 0; } if (val == s) goto no_value; if (strlen(key) > BOOTH_NAME_LEN || strlen(val) > BOOTH_NAME_LEN) { error = "key/value too long"; goto err; } if (strcmp(key, "transport") == 0) { if (got_transport) { error = "config file has multiple transport lines"; goto err; } if (strcasecmp(val, "UDP") == 0) booth_conf->proto = UDP; else if (strcasecmp(val, "SCTP") == 0) booth_conf->proto = SCTP; else { error = "invalid transport protocol"; goto err; } got_transport = 1; } if (strcmp(key, "port") == 0) booth_conf->port = atoi(val); if (strcmp(key, "name") == 0) { if(strlen(val)+1 >= BOOTH_NAME_LEN) { error = "Config name too long."; goto err; } } if (strcmp(key, "site") == 0) { if (add_node(val, SITE)) goto out; } if (strcmp(key, "arbitrator") == 0) { if (add_node(val, ARBITRATOR)) goto out; } if (strcmp(key, "ticket") == 0) { int count = booth_conf->ticket_count; if (booth_conf->ticket_count == ticket_size) { if (ticket_realloc() < 0) goto out; } expiry = index(val, ';'); weight = rindex(val, ';'); if (!expiry) { strcpy(booth_conf->ticket[count].name, val); booth_conf->ticket[count].expiry = DEFAULT_TICKET_EXPIRY; log_info("expire is not set in %s." " Set the default value %ds.", booth_conf->ticket[count].name, DEFAULT_TICKET_EXPIRY); } else if (expiry && expiry == weight) { *expiry++ = '\0'; while (*expiry == ' ') expiry++; strcpy(booth_conf->ticket[count].name, val); booth_conf->ticket[count].expiry = atoi(expiry); } else { *expiry++ = '\0'; *weight++ = '\0'; while (*expiry == ' ') expiry++; while (*weight == ' ') weight++; strcpy(booth_conf->ticket[count].name, val); booth_conf->ticket[count].expiry = atoi(expiry); i = 0; while ((c = index(weight, ','))) { *c++ = '\0'; booth_conf->ticket[count].weight[i++] = atoi(weight); while (*c == ' ') c++; weight = c; if (i == MAX_NODES) { error = "too many weights"; goto err; } } } booth_conf->ticket_count++; } } /* Default: make config name match config filename. */ if (!booth_conf->name[0]) { cp = strrchr(path, '/'); if (!cp) cp = path; /* TODO: locale? */ /* NUL-termination by memset. */ for(i=0; iname[i] = *(cp++); /* Last resort. */ if (!booth_conf->name[0]) strcpy(booth_conf->name, "booth"); } return 0; err: log_error("%s in config file line %d", error, lineno); out: free(booth_conf); booth_conf = NULL; return -1; } int check_config(int type) { if (!booth_conf) return -1; return 0; } int find_site_in_config(unsigned char *site, struct booth_node **node) { struct booth_node *n; int i; if (!booth_conf) return 0; for (i = 0; i < booth_conf->node_count; i++) { n = booth_conf->node + i; if (n->type == SITE && strcmp(n->addr_string, site) == 0) { *node = n; return 1; } } return 0; } const char *type_to_string(int type) { switch (type) { case ARBITRATOR: return "arbitrator"; case SITE: return "site"; case CLIENT: return "client"; } return "??invalid-type??"; } diff --git a/src/main.c b/src/main.c index 96ae69f..7d41d73 100644 --- a/src/main.c +++ b/src/main.c @@ -1,1249 +1,1248 @@ /* * Copyright (C) 2011 Jiaju Zhang * Copyright (C) 2013 Philipp Marek * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This software is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "log.h" #include "booth.h" #include "config.h" #include "transport.h" #include "timer.h" #include "pacemaker.h" #include "ticket.h" #define RELEASE_VERSION "1.0" #define CLIENT_NALLOC 32 int daemonize = 0; static int client_maxi; static int client_size = 0; struct client *client = NULL; struct pollfd *pollfd = NULL; typedef enum { BOOTHD_STARTED=0, BOOTHD_STARTING } BOOTH_DAEMON_STATE; int poll_timeout = -1; typedef enum { OP_LIST = 1, OP_GRANT, OP_REVOKE, } operation_t; struct command_line { int type; /* ACT_ */ int op; /* OP_ */ char configfile[BOOTH_PATH_LEN]; char lockfile[BOOTH_PATH_LEN]; struct boothc_ticket_site_msg msg; }; static struct command_line cl; int do_read(int fd, void *buf, size_t count) { int rv, off = 0; while (off < count) { rv = read(fd, (char *)buf + off, count - off); if (rv == 0) return -1; if (rv == -1 && errno == EINTR) continue; if (rv == -1) return -1; off += rv; } return 0; } int do_write(int fd, void *buf, size_t count) { int rv, off = 0; retry: rv = write(fd, (char *)buf + off, count); if (rv == -1 && errno == EINTR) goto retry; /* If we cannot write _any_ data, we'd be in an (potential) loop. */ if (rv <= 0) { log_error("write failed: %s (%d)", strerror(errno), errno); return rv; } if (rv != count) { count -= rv; off += rv; goto retry; } return 0; } static int do_local_connect_and_write(void *data, int len, struct booth_node **ret) { struct booth_node *node; int rv; if (ret) *ret = NULL; /* Use locally reachable address, ie. in same cluster. */ if (!find_myself(&node, 1)) { log_error("Cannot find local cluster."); return ENOENT; } if (ret) *ret = node; /* Always use TCP within cluster. */ rv = booth_tcp_open(node); if (rv < 0) goto out; rv = booth_tcp_send(node, data, len); out: return rv; } static void client_alloc(void) { int i; if (!client) { client = malloc(CLIENT_NALLOC * sizeof(struct client)); pollfd = malloc(CLIENT_NALLOC * sizeof(struct pollfd)); } else { client = realloc(client, (client_size + CLIENT_NALLOC) * sizeof(struct client)); pollfd = realloc(pollfd, (client_size + CLIENT_NALLOC) * sizeof(struct pollfd)); if (!pollfd) log_error("can't alloc for pollfd"); } if (!client || !pollfd) log_error("can't alloc for client array"); for (i = client_size; i < client_size + CLIENT_NALLOC; i++) { client[i].workfn = NULL; client[i].deadfn = NULL; client[i].fd = -1; pollfd[i].fd = -1; pollfd[i].revents = 0; } client_size += CLIENT_NALLOC; } static void client_dead(int ci) { close(client[ci].fd); client[ci].workfn = NULL; client[ci].fd = -1; pollfd[ci].fd = -1; } int client_add(int fd, void (*workfn)(int ci), void (*deadfn)(int ci)) { int i; if (!client) client_alloc(); again: for (i = 0; i < client_size; i++) { if (client[i].fd == -1) { client[i].workfn = workfn; if (deadfn) client[i].deadfn = deadfn; else client[i].deadfn = client_dead; client[i].fd = fd; pollfd[i].fd = fd; pollfd[i].events = POLLIN; if (i > client_maxi) client_maxi = i; return i; } } client_alloc(); goto again; } void process_connection(int ci) { struct boothc_ticket_site_msg msg; struct ticket_config *tc; int is_local, rv, len, exp, olen; void (*deadfn) (int ci); char *data; rv = do_read(client[ci].fd, &msg.header, sizeof(msg.header)); if (rv < 0) { if (errno == ECONNRESET) log_debug("client %d connection reset for fd %d", ci, client[ci].fd); goto kill; } if (check_boothc_header(&msg.header, -1) < 0) goto kill; /* Basic sanity checks already done. */ len = ntohl(msg.header.length); if (len) { if (len != sizeof(msg)) { bad_len: log_error("got wrong length %u", len); return; } exp = len - sizeof(msg.header); rv = do_read(client[ci].fd, msg.header.data, exp); if (rv != exp) { log_error("connection %d read data error %d, wanted %d", ci, rv, exp); goto kill; } } olen = 0; /* Commands have input msg; * and output rv, data and olen (excluding header). */ switch (ntohl(msg.header.cmd)) { case BOOTHC_CMD_LIST: assert(!data); rv = list_ticket(&data, &olen); goto reply; case BOOTHC_CMD_GRANT: /* Expect boothc_ticket_site_msg. */ if (len != sizeof(msg)) goto bad_len; /* Need to return ticket name etc. */ olen = len; data = msg.header.data; if (!check_ticket(msg.ticket.id, &tc)) { rv = BOOTHC_RLT_INVALID_ARG; goto reply; } if (tc->owner != NO_OWNER) { log_error("client want to get an granted " "ticket %s", msg.ticket.id); rv = BOOTHC_RLT_OVERGRANT; goto reply; } if (!check_site(msg.site.site, &is_local)) { rv = BOOTHC_RLT_INVALID_ARG; goto reply; } if (is_local) rv = grant_ticket(msg.ticket.id); else rv = BOOTHC_RLT_REMOTE_OP; break; case BOOTHC_CMD_REVOKE: /* Expect boothc_ticket_site_msg. */ if (len != sizeof(msg)) goto bad_len; olen = len; data = msg.header.data; if (!check_ticket(msg.ticket.id, &tc)) { msg.header.result = BOOTHC_RLT_INVALID_ARG; goto reply; } if (!check_site(msg.site.site, &is_local)) { msg.header.result = BOOTHC_RLT_INVALID_ARG; goto reply; } if (is_local) msg.header.result = revoke_ticket(msg.ticket.id); else msg.header.result = BOOTHC_RLT_REMOTE_OP; break; case BOOTHC_CMD_CATCHUP: /* Expect boothc_ticket_site_msg. */ if (len != sizeof(msg)) goto bad_len; /* Need to return ticket name etc. */ olen = len; data = msg.header.data; if (!check_ticket(msg.ticket.id, &tc)) { rv = BOOTHC_RLT_INVALID_ARG; goto reply; } rv = catchup_ticket(&msg.ticket, tc); /* Only answer if we're the owner. */ if (rv == -1) goto kill; break; default: log_error("connection %d cmd %x unknown", ci, ntohl(msg.header.cmd)); goto kill; } reply: msg.header.result = htonl(rv); msg.header.length = htonl(olen + sizeof(msg.header)); rv = do_write(client[ci].fd, &msg.header, sizeof(msg.header)); if (rv < 0) log_error("connection %d write error %d", ci, rv); if (len) { rv = do_write(client[ci].fd, data, olen); if (rv < 0) log_error("connection %d write error %d", ci, rv); } return; kill: deadfn = client[ci].deadfn; if(deadfn) { deadfn(ci); } return; } static void process_listener(int ci) { int fd, i; fd = accept(client[ci].fd, NULL, NULL); if (fd < 0) { log_error("process_listener: accept error for fd %d: %s (%d)", client[ci].fd, strerror(errno), errno); if (client[ci].deadfn) client[ci].deadfn(ci); return; } i = client_add(fd, process_connection, NULL); log_debug("add client connection %d fd %d", i, fd); } static int setup_config(int type) { int rv; rv = read_config(cl.configfile); if (rv < 0) goto out; /* Set "local" pointer, ignoring errors. */ find_myself(NULL, 0); rv = check_config(type); if (rv < 0) goto out; /* Per default the PID file name is derived from the * configuration name. */ if (!cl.lockfile[0]) { snprintf(cl.lockfile, sizeof(cl.lockfile)-1, "%s/%s.pid", BOOTH_RUN_DIR, booth_conf->name); } out: return rv; } static int setup_transport(void) { int rv; rv = transport()->init(ticket_recv); if (rv < 0) { log_error("failed to init booth_transport %s", transport()->name); goto out; } rv = booth_transport[TCP].init(NULL); if (rv < 0) { log_error("failed to init booth_transport[TCP]"); goto out; } out: return rv; } static int setup_timer(void) { return timerlist_init(); } static int write_daemon_state(int fd, int state) { char buffer[1024]; int rv, size; size = sizeof(buffer) - 1; rv = snprintf(buffer, size, "booth_pid=%d " "booth_state=%s " "booth_type=%s " "booth_cfg_name='%s' " "booth_addr_string='%s' " "booth_port=%d\n", getpid(), ( state == BOOTHD_STARTED ? "started" : state == BOOTHD_STARTING ? "starting" : "invalid"), type_to_string(local->type), booth_conf->name, local->addr_string, booth_conf->port); if (rv < 0 || rv == size) { log_error("Buffer filled up in write_daemon_state()."); return -1; } size = rv; rv = ftruncate(fd, 0); if (rv < 0) { log_error("lockfile %s truncate error %d: %s", cl.lockfile, errno, strerror(errno)); return rv; } rv = lseek(fd, 0, SEEK_SET); if (rv < 0) { log_error("lseek set fd(%d) offset to 0 error, return(%d), message(%s)", fd, rv, strerror(errno)); rv = -1; return rv; } rv = write(fd, buffer, size); if (rv != size) { log_error("write to fd(%d, %d) returned %d, errno %d, message(%s)", fd, size, rv, errno, strerror(errno)); return -1; } return 0; } static int loop(int fd) { void (*workfn) (int ci); void (*deadfn) (int ci); int rv, i; rv = setup_timer(); if (rv < 0) goto fail; rv = setup_transport(); if (rv < 0) goto fail; rv = setup_ticket(); if (rv < 0) goto fail; client_add(rv, process_listener, NULL); rv = write_daemon_state(fd, BOOTHD_STARTED); if (rv != 0) { log_error("write daemon state %d to lockfile error %s: %s", BOOTHD_STARTED, cl.lockfile, strerror(errno)); goto fail; } if (cl.type == ARBITRATOR) log_info("BOOTH arbitrator daemon started"); else if (cl.type == SITE) log_info("BOOTH cluster site daemon started"); while (1) { rv = poll(pollfd, client_maxi + 1, poll_timeout); if (rv == -1 && errno == EINTR) continue; if (rv < 0) { log_error("poll failed: %s (%d)", strerror(errno), errno); goto fail; } for (i = 0; i <= client_maxi; i++) { if (client[i].fd < 0) continue; if (pollfd[i].revents & POLLIN) { workfn = client[i].workfn; if (workfn) workfn(i); } if (pollfd[i].revents & (POLLERR | POLLHUP | POLLNVAL)) { deadfn = client[i].deadfn; if (deadfn) deadfn(i); } } process_timerlist(); } return 0; fail: return -1; } static int query_get_string_answer(cmd_request_t cmd) { struct booth_node *node; struct boothc_header h, reply; char *data; int data_len; int rv; data = NULL; init_header(&h, cmd, 0, 0); rv = do_local_connect_and_write(&h, sizeof(h), &node); if (rv < 0) goto out; rv = local_transport->recv(node, &reply, sizeof(reply)); if (rv < 0) goto out_free; data_len = ntohl(reply.length) - sizeof(reply); data = malloc(data_len); if (!data) { rv = -ENOMEM; goto out_free; } rv = local_transport->recv(node, data, data_len); if (rv < 0) goto out_free; do_write(STDOUT_FILENO, data, data_len); rv = 0; out_free: free(data); local_transport->close(node); out: return rv; } static int do_command(cmd_request_t cmd) { struct booth_node *node, *to; struct boothc_header reply; int rv; node = NULL; to = NULL; init_ticket_site_header(&cl.msg, cmd); rv = do_local_connect_and_write(&cl.msg, sizeof(cl.msg), &node); if (rv < 0) goto out_close; rv = local_transport->recv(node, &reply, sizeof(reply)); if (rv < 0) goto out_close; if (reply.result == BOOTHC_RLT_INVALID_ARG) { log_info("invalid argument!"); rv = -1; goto out_close; } if (reply.result == BOOTHC_RLT_OVERGRANT) { log_info("You're granting a granted ticket " "If you wanted to migrate a ticket," "use revoke first, then use grant"); rv = -1; goto out_close; } if (reply.result == BOOTHC_RLT_REMOTE_OP) { if (!find_site_in_config(cl.msg.site.site, &to)) { log_error("Redirected to unknown site %s.", cl.msg.site.site); rv = -1; goto out_close; } rv = booth_transport[TCP].open(to); if (rv < 0) { goto out_close; } rv = booth_transport[TCP].send(to, &cl.msg, sizeof(cl.msg)); if (rv < 0) { booth_transport[TCP].close(to); goto out_close; } rv = booth_transport[TCP].recv(to, &reply, sizeof(struct boothc_header)); if (rv < 0) { booth_transport[TCP].close(to); goto out_close; } booth_transport[TCP].close(to); } if (reply.result == BOOTHC_RLT_ASYNC) { if (cmd == BOOTHC_CMD_GRANT) log_info("grant command sent, result will be returned " "asynchronously, you can get the result from " "the log files"); else if (cmd == BOOTHC_CMD_REVOKE) log_info("revoke command sent, result will be returned " "asynchronously, you can get the result from " "the log files."); else log_error("internal error reading reply result!"); rv = 0; } else if (reply.result == BOOTHC_RLT_SYNC_SUCC) { if (cmd == BOOTHC_CMD_GRANT) log_info("grant succeeded!"); else if (cmd == BOOTHC_CMD_REVOKE) log_info("revoke succeeded!"); rv = 0; } else if (reply.result == BOOTHC_RLT_SYNC_FAIL) { if (cmd == BOOTHC_CMD_GRANT) log_info("grant failed!"); else if (cmd == BOOTHC_CMD_REVOKE) log_info("revoke failed!"); rv = -1; } else { log_error("internal error!"); rv = -1; } out_close: if (node) local_transport->close(node); if (to) booth_transport[TCP].close(to); return rv; } static int do_grant(void) { return do_command(BOOTHC_CMD_GRANT); } static int do_revoke(void) { return do_command(BOOTHC_CMD_REVOKE); } static int _lockfile(int mode, int *fdp, pid_t *locked_by) { struct flock lock; int fd, rv; /* After reboot the directory may not yet exist. * Try to create it, but ignore errors. */ if (strncmp(cl.lockfile, BOOTH_RUN_DIR, strlen(BOOTH_RUN_DIR)) == 0) mkdir(BOOTH_RUN_DIR, 0775); if (locked_by) *locked_by = 0; *fdp = -1; fd = open(cl.lockfile, mode, 0664); if (fd < 0) return errno; *fdp = fd; lock.l_type = F_WRLCK; lock.l_start = 0; lock.l_whence = SEEK_SET; lock.l_len = 0; lock.l_pid = 0; if (fcntl(fd, F_SETLK, &lock) == 0) return 0; rv = errno; if (locked_by) if (fcntl(fd, F_GETLK, &lock) == 0) *locked_by = lock.l_pid; return rv; } static int lockfile(void) { int rv, fd; fd = -1; rv = _lockfile(O_CREAT | O_WRONLY, &fd, NULL); if (fd == -1) { log_error("lockfile %s open error %d: %s", cl.lockfile, rv, strerror(rv)); return -1; } if (rv < 0) { log_error("lockfile %s setlk error %d: %s", cl.lockfile, rv, strerror(rv)); goto fail; } rv = write_daemon_state(fd, BOOTHD_STARTING); if (rv != 0) { log_error("write daemon state %d to lockfile error %s: %s", BOOTHD_STARTING, cl.lockfile, strerror(errno)); goto fail; } return fd; fail: close(fd); return -1; } static void unlink_lockfile(int fd) { unlink(cl.lockfile); close(fd); } static void print_usage(void) { printf("Usage:\n"); printf("booth [options]\n"); printf("\n"); printf("Types:\n"); printf(" arbitrator: daemon running on arbitrator\n"); printf(" site: daemon running on cluster site\n"); printf(" client: command running from client\n"); printf("\n"); printf("Operations:\n"); printf("Please note that operations are valid iff type is client!\n"); printf(" list: List all the tickets\n"); printf(" grant: Grant ticket T(-t T) to site S(-s S)\n"); printf(" revoke: Revoke ticket T(-t T) from site S(-s S)\n"); printf("\n"); printf("Options:\n"); printf(" -c FILE Specify config file [default " BOOTH_DEFAULT_CONF "]\n"); printf(" -l LOCKFILE Specify lock file path\n"); printf(" -D Enable debugging to stderr and don't fork\n"); printf(" -t ticket name\n"); printf(" -S report local daemon status (for site and arbitrator)\n"); printf(" RA script compliant return codes.\n"); printf(" -s site name\n"); printf(" -h Print this help, then exit\n"); } #define OPTION_STRING "c:Dl:t:s:hS" void safe_copy(char *dest, char *value, size_t buflen, const char *description) { int content_len = buflen - 1; if (strlen(value) >= content_len) { fprintf(stderr, "'%s' exceeds maximum %s length of %d\n", value, description, content_len); exit(EXIT_FAILURE); } strncpy(dest, value, content_len); dest[content_len] = 0; } static int host_convert(char *hostname, char *ip_str, size_t ip_size) { struct addrinfo *result = NULL, hints = {0}; int re = -1; memset(&hints, 0, sizeof(hints)); hints.ai_family = BOOTH_PROTO_FAMILY; hints.ai_socktype = SOCK_DGRAM; re = getaddrinfo(hostname, NULL, &hints, &result); if (re == 0) { struct in_addr addr = ((struct sockaddr_in *)result->ai_addr)->sin_addr; const char *re_ntop = inet_ntop(BOOTH_PROTO_FAMILY, &addr, ip_str, ip_size); if (re_ntop == NULL) { re = -1; } } freeaddrinfo(result); return re; } static int read_arguments(int argc, char **argv) { int optchar; char *arg1 = argv[1]; char *op = NULL; char site_arg[INET_ADDRSTRLEN] = {0}; if (argc < 2 || !strcmp(arg1, "help") || !strcmp(arg1, "--help") || !strcmp(arg1, "-h")) { print_usage(); exit(EXIT_SUCCESS); } if (!strcmp(arg1, "version") || !strcmp(arg1, "--version") || !strcmp(arg1, "-V")) { printf("%s %s (built %s %s)\n", argv[0], RELEASE_VERSION, __DATE__, __TIME__); exit(EXIT_SUCCESS); } if (strcmp(arg1, "arbitrator") == 0 || strcmp(arg1, "site") == 0 || strcmp(arg1, "start") == 0 || strcmp(arg1, "daemon") == 0) { cl.type = DAEMON; optind = 2; } else if (strcmp(arg1, "status") == 0) { cl.type = STATUS; optind = 2; } else if (strcmp(arg1, "client") == 0) { cl.type = CLIENT; if (argc < 3) { print_usage(); exit(EXIT_FAILURE); } op = argv[2]; optind = 3; } else { cl.type = CLIENT; op = argv[1]; optind = 2; } switch (cl.type) { case ARBITRATOR: break; case SITE: break; case CLIENT: if (!strcmp(op, "list")) cl.op = OP_LIST; else if (!strcmp(op, "grant")) cl.op = OP_GRANT; else if (!strcmp(op, "revoke")) cl.op = OP_REVOKE; else { fprintf(stderr, "client operation \"%s\" is unknown\n", op); exit(EXIT_FAILURE); } break; } while (optind < argc) { optchar = getopt(argc, argv, OPTION_STRING); switch (optchar) { case 'c': safe_copy(cl.configfile, optarg, sizeof(cl.configfile), "config file"); break; case 'D': daemonize = 1; debug_level++; break; case 'l': safe_copy(cl.lockfile, optarg, sizeof(cl.lockfile), "lock file"); break; case 't': if (cl.op == OP_GRANT || cl.op == OP_REVOKE) { safe_copy(cl.msg.ticket.id, optarg, sizeof(cl.msg.ticket.id), "ticket name"); } else { print_usage(); exit(EXIT_FAILURE); } break; case 's': if (cl.op == OP_GRANT || cl.op == OP_REVOKE) { int re = host_convert(optarg, site_arg, INET_ADDRSTRLEN); if (re == 0) { safe_copy(cl.msg.site.site, site_arg, sizeof(cl.msg.ticket), "site name"); } else { safe_copy(cl.msg.site.site, optarg, sizeof(cl.msg.ticket), "site name"); } } else { print_usage(); exit(EXIT_FAILURE); } break; case 'h': print_usage(); exit(EXIT_SUCCESS); break; case ':': case '?': fprintf(stderr, "Please use '-h' for usage.\n"); exit(EXIT_FAILURE); break; default: fprintf(stderr, "unknown option: %s\n", argv[optind]); exit(EXIT_FAILURE); break; }; } return 0; } static void set_scheduler(void) { struct sched_param sched_param; struct rlimit rlimit; int rv; rlimit.rlim_cur = RLIM_INFINITY; rlimit.rlim_max = RLIM_INFINITY; setrlimit(RLIMIT_MEMLOCK, &rlimit); rv = mlockall(MCL_CURRENT | MCL_FUTURE); if (rv < 0) { log_error("mlockall failed"); } rv = sched_get_priority_max(SCHED_RR); if (rv != -1) { sched_param.sched_priority = rv; rv = sched_setscheduler(0, SCHED_RR, &sched_param); if (rv == -1) log_error("could not set SCHED_RR priority %d: %s (%d)", sched_param.sched_priority, strerror(errno), errno); } else { log_error("could not get maximum scheduler priority err %d", errno); } } static void set_oom_adj(int val) { FILE *fp; fp = fopen("/proc/self/oom_adj", "w"); if (!fp) return; fprintf(fp, "%i", val); fclose(fp); } static int do_status(int type) { pid_t pid; int rv, lock_fd, ret; const char *reason = NULL; char lockfile_data[1024], *cp; ret = PCMK_OCF_NOT_RUNNING; /* TODO: query all, and return quit only if it's _cleanly_ not * running, ie. _neither_ of port/lockfile/process is available? * * Currently a single failure says "not running", even if "only" the * lockfile has been removed. */ rv = setup_config(type); if (rv) { reason = "Error reading configuration."; ret = PCMK_LSB_UNKNOWN_ERROR; goto quit; } if (!local) { reason = "No Service IP active here."; goto quit; } rv = _lockfile(O_RDWR, &lock_fd, &pid); if (rv == 0) { reason = "PID file not locked."; goto quit; } if (lock_fd == -1) { reason = "No PID file."; goto quit; } if (pid) { fprintf(stdout, "booth_lockpid=%d ", pid); fflush(stdout); } rv = read(lock_fd, lockfile_data, sizeof(lockfile_data) - 1); if (rv < 4) { reason = "Cannot read lockfile data."; ret = PCMK_LSB_UNKNOWN_ERROR; goto quit; } lockfile_data[rv] = 0; if (lock_fd != -1) close(lock_fd); /* Make sure it's only a single line */ cp = strchr(lockfile_data, '\r'); if (cp) *cp = 0; cp = strchr(lockfile_data, '\n'); if (cp) *cp = 0; rv = setup_udp_server(1); if (rv == 0) { reason = "UDP port not in use."; goto quit; } fprintf(stdout, "booth_lockfile='%s' %s\n", cl.lockfile, lockfile_data); if (daemonize) fprintf(stderr, "Booth at %s port %d seems to be running.\n", local->addr_string, booth_conf->port); return 0; quit: log_debug("not running: %s", reason); /* Ie. "DEBUG" */ if (daemonize) fprintf(stderr, "not running: %s\n", reason); return ret; } static int do_server(int type) { int lock_fd = -1; int rv = -1; static char log_ent[128] = DAEMON_NAME "-"; rv = setup_config(type); if (rv < 0) goto out; if (!local) { log_error("Cannot find myself in the configuration."); exit(EXIT_FAILURE); } if (!daemonize) { if (daemon(0, 0) < 0) { perror("daemon error"); exit(EXIT_FAILURE); } } /* The lockfile must be written to _after_ the call to daemon(), so * that the lockfile contains the pid of the daemon, not the parent. */ lock_fd = lockfile(); if (lock_fd < 0) return lock_fd; strcat(log_ent, type_to_string(local->type)); cl_log_set_entity(log_ent); cl_log_enable_stderr(debug_level ? TRUE : FALSE); cl_log_set_facility(HA_LOG_FACILITY); cl_inherit_logging_environment(0); - if (local->type == ARBITRATOR) - log_info("BOOTH arbitrator daemon is starting."); - else if (local->type == SITE) - log_info("BOOTH cluster site daemon is starting."); + log_info("BOOTH %s daemon is starting, node id is %08X.", + type_to_string(local->type), + local->nodeid); set_scheduler(); set_oom_adj(-16); set_proc_title("%s %s for [%s]:%d", DAEMON_NAME, type_to_string(local->type), local->addr_string, booth_conf->port); rv = loop(lock_fd); out: if (lock_fd >= 0) unlink_lockfile(lock_fd); return rv; } static int do_client(void) { int rv = -1; rv = setup_config(CLIENT); if (rv < 0) { log_error("cannot read config"); goto out; } switch (cl.op) { case OP_LIST: rv = query_get_string_answer(CMD_LIST); break; case OP_GRANT: rv = do_grant(); break; case OP_REVOKE: rv = do_revoke(); break; } out: return rv; } int main(int argc, char *argv[], char *envp[]) { int rv; init_set_proc_title(argc, argv, envp); memset(&cl, 0, sizeof(cl)); strncpy(cl.configfile, BOOTH_DEFAULT_CONF, BOOTH_PATH_LEN - 1); cl.lockfile[0] = 0; debug_level = 0; cl_log_set_entity("booth"); cl_log_enable_stderr(TRUE); cl_log_set_facility(0); rv = read_arguments(argc, argv); if (rv < 0) goto out; switch (cl.type) { case STATUS: rv = do_status(cl.type); break; case ARBITRATOR: case DAEMON: case SITE: rv = do_server(cl.type); break; case CLIENT: rv = do_client(); break; } out: /* Normalize values. 0x100 would be seen as "OK" by waitpid(). */ return rv >= 0 && rv < 0x70 ? rv : 1; }