/* * CDDL HEADER START * * The contents of this file are subject to the terms of the * Common Development and Distribution License (the "License"). * You may not use this file except in compliance with the License. * * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE * or http://www.opensolaris.org/os/licensing. * See the License for the specific language governing permissions * and limitations under the License. * * When distributing Covered Code, include this CDDL HEADER in each * file and include the License file at usr/src/OPENSOLARIS.LICENSE. * If applicable, add the following below this CDDL HEADER, with the * fields enclosed by brackets "[]" replaced with your own identifying * information: Portions Copyright [yyyy] [name of copyright owner] * * CDDL HEADER END */ /* * Copyright 2008 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. */ #include #include #include #include #include #include #include #include #include #include #include #include #include "mdmn_subr.h" /* * This is the communication daemon for SVM Multi Node Disksets. * It runs on every node and provides the following rpc services: * - mdmn_send_svc_2 * - mdmn_work_svc_2 * - mdmn_wakeup_initiator_svc_2 * - mdmn_wakeup_master_svc_2 * - mdmn_comm_lock_svc_2 * - mdmn_comm_unlock_svc_2 * - mdmn_comm_suspend_svc_2 * - mdmn_comm_resume_svc_2 * - mdmn_comm_reinit_set_svc_2 * where send, lock, unlock and reinit are meant for external use, * work and the two wakeups are for internal use only. * * NOTE: * On every node only one of those xxx_2 functions can be active at the * same time because the daemon is single threaded. * * (not quite true, as mdmn_send_svc_2 and mdmn_work_svc_2 do thr_create()s * as part of their handlers, so those aspects are multi-threaded) * * In case an event occurs that has to be propagated to all the nodes... * * One node (the initiator) * calls the libmeta function mdmn_send_message() * This function calls the local daemon thru mdmn_send_svc_2. * * On the initiator: * mdmn_send_svc_2() * - starts a thread -> mdmn_send_to_work() and returns. * mdmn_send_to_work() * - sends this message over to the master of the diskset. * This is done by calling mdmn_work_svc_2 on the master. * - registers to the initiator_table * - exits without doing a svc_sendreply() for the call to * mdmn_send_svc_2. This means that call is blocked until somebody * (see end of this comment) does a svc_sendreply(). * This means mdmn_send_message() does not yet return. * - A timeout surveillance is started at this point. * This means in case the master doesn't reply at all in an * aproppriate time, an error condition is returned * to the caller. * * On the master: * mdmn_work_svc_2() * - starts a thread -> mdmn_master_process_msg() and returns * mdmn_master_process_msg() * - logs the message to the change log * - executes the message locally * - flags the message in the change log * - sends the message to mdmn_work_svc_2() on all the * other nodes (slaves) * after each call to mdmn_work_svc_2 the thread goes to sleep and * will be woken up by mdmn_wakeup_master_svc_2() as soon as the * slave node is done with this message. * - In case the slave doesn't respond in a apropriate time, an error * is assumed to ensure the master doesn't wait forever. * * On a slave: * mdmn_work_svc_2() * - starts a thread -> mdmn_slave_process_msg() and returns * mdmn_slave_process_msg() * - processes this message locally by calling the appropriate message * handler, that creates some result. * - sends that result thru a call to mdmn_wakeup_master_svc_2() to * the master. * * Back on the master: * mdmn_wakeup_master_svc_2() * - stores the result into the master_table. * - signals the mdmn_master_process_msg-thread. * - returns * mdmn_master_process_msg() * - after getting the results from all nodes * - sends them back to the initiating node thru a call to * mdmn_wakeup_initiator_svc_2. * * Back on the initiator: * mdmn_wakeup_initiator_svc_2() * - calls svc_sendreply() which makes the call to mdmn_send_svc_2() * return. * which allows the initial mdmn_send_message() call to return. */ FILE *commdout; /* debug output for the commd */ char *commdoutfile; /* file name for the above output */ /* want at least 10 MB free space when logging into a file */ #define MIN_FS_SPACE (10LL * 1024 * 1024) /* * Number of outstanding messages that were initiated by this node. * If zero, check_timeouts goes to sleep */ uint_t messages_on_their_way; mutex_t check_timeout_mutex; /* need mutex to protect above */ cond_t check_timeout_cv; /* trigger for check_timeouts */ /* for printing out time stamps */ hrtime_t __savetime; /* RPC clients for every set and every node and their protecting locks */ CLIENT *client[MD_MAXSETS][NNODES]; rwlock_t client_rwlock[MD_MAXSETS]; /* the descriptors of all possible sets and their protectors */ struct md_set_desc *set_descriptor[MD_MAXSETS]; rwlock_t set_desc_rwlock[MD_MAXSETS]; /* the daemon to daemon communication has to timeout quickly */ static struct timeval FOUR_SECS = { 4, 0 }; /* These indicate if a set has already been setup */ int md_mn_set_inited[MD_MAXSETS]; /* For every set we have a message completion table and protecting mutexes */ md_mn_mct_t *mct[MD_MAXSETS]; mutex_t mct_mutex[MD_MAXSETS][MD_MN_NCLASSES]; /* Stuff to describe the global status of the commd on one node */ #define MD_CGS_INITED 0x0001 #define MD_CGS_ABORTED 0x0002 /* return everything with MDMNE_ABORT */ uint_t md_commd_global_state = 0; /* No state when starting up */ /* * Global verbosity level for the daemon */ uint_t md_commd_global_verb; /* * libmeta doesn't like multiple threads in metaget_setdesc(). * So we must protect access to it with a global lock */ mutex_t get_setdesc_mutex; /* * Need a way to block single message types, * hence an array with a status for every message type */ uint_t msgtype_lock_state[MD_MN_NMESSAGES]; /* for reading in the config file */ #define MAX_LINE_SIZE 1024 extern char *commd_get_outfile(void); extern uint_t commd_get_verbosity(void); /* * mdmn_clnt_create is a helper function for meta_client_create_retry. It * merely needs to call clnt_create_timed, and meta_client_create_retry * will take care of the rest. */ /* ARGSUSED */ static CLIENT * mdmn_clnt_create(char *ignore, void *data, struct timeval *time_out) { md_mnnode_desc *node = (md_mnnode_desc *)data; return (clnt_create_timed(node->nd_priv_ic, MDMN_COMMD, TWO, "tcp", time_out)); } #define FLUSH_DEBUGFILE() \ if (commdout != (FILE *)NULL) { \ fflush(commdout); \ fsync(fileno(commdout)); \ } static void panic_system(int nid, md_mn_msgtype_t type, int master_err, int master_exitval, md_mn_result_t *slave_result) { md_mn_commd_err_t commd_err; md_error_t mne = mdnullerror; char *msg_buf; msg_buf = (char *)calloc(MAXPATHLEN + 1, sizeof (char)); FLUSH_DEBUGFILE(); if (master_err != MDMNE_ACK) { snprintf(msg_buf, MAXPATHLEN, "rpc.mdcommd: RPC fail on master " "when processing message type %d\n", type); } else if (slave_result == NULL) { snprintf(msg_buf, MAXPATHLEN, "rpc.mdcommd: RPC fail on node " "%d when processing message type %d\n", nid, type); } else { snprintf(msg_buf, MAXPATHLEN, "rpc.mdcommd: Inconsistent " "return value from node %d when processing message " "type %d. Master exitval = %d, Slave exitval = %d\n", nid, type, master_exitval, slave_result->mmr_exitval); } commd_err.size = strlen(msg_buf); commd_err.md_message = (uint64_t)(uintptr_t)&msg_buf[0]; metaioctl(MD_MN_COMMD_ERR, &commd_err, &mne, "rpc.mdcommd"); (void) uadmin(A_DUMP, AD_BOOT, NULL); } static void flush_fcout() { struct statvfs64 vfsbuf; long long avail_bytes; int warned = 0; for (; ; ) { sleep(10); /* No output file, nothing to do */ if (commdout == (FILE *)NULL) continue; /* * stat the appropriate filesystem to check for available space. */ if (statvfs64(commdoutfile, &vfsbuf)) { continue; } avail_bytes = vfsbuf.f_frsize * vfsbuf.f_bavail; /* * If we don't have enough space, we print out a warning. * And we drop the verbosity level to NULL * In case the condtion doesn't go away, we don't repeat * the warning. */ if (avail_bytes < MIN_FS_SPACE) { if (warned) { continue; } commd_debug(MD_MMV_SYSLOG, "NOT enough space available for logging\n"); commd_debug(MD_MMV_SYSLOG, "Have %lld bytes, need %lld bytes\n", avail_bytes, MIN_FS_SPACE); warned = 1; md_commd_global_verb = MD_MMV_NULL; } else { warned = 0; } fflush(commdout); } } /* safer version of clnt_destroy. If clnt is NULL don't do anything */ #define mdmn_clnt_destroy(clnt) { \ if (clnt) \ clnt_destroy(clnt); \ } /* * Own version of svc_sendreply that checks the integrity of the transport * handle and so prevents us from core dumps in the real svc_sendreply() */ void mdmn_svc_sendreply(SVCXPRT *transp, xdrproc_t xdr, caddr_t data) { if (SVC_STAT(transp) == XPRT_DIED) { commd_debug(MD_MMV_MISC, "mdmn_svc_sendreply: XPRT_DIED\n"); return; } (void) svc_sendreply(transp, xdr, data); } /* * timeout_initiator(set, class) * * Alas, I sent a message and didn't get a response back in aproppriate time. * * timeout_initiator() takes care for doing the needed svc_sendreply() to the * calling mdmn_send_message, so that guy doesn't wait forever * What is done here is pretty much the same as what is done in * wakeup initiator. The difference is that we cannot provide for any results, * of course and we set the comm_state to MDMNE_TIMEOUT. * * By doing so, mdmn_send_message can decide if a retry would make sense or not. * It's not our's to decide that here. */ void timeout_initiator(set_t setno, md_mn_msgclass_t class) { SVCXPRT *transp; md_mn_msgid_t mid; md_mn_result_t *resultp; resultp = Zalloc(sizeof (md_mn_result_t)); resultp->mmr_comm_state = MDMNE_TIMEOUT; commd_debug(MD_MMV_MISC, "timeout_initiator set = %d, class = %d\n", setno, class); transp = mdmn_get_initiator_table_transp(setno, class); mdmn_get_initiator_table_id(setno, class, &mid); commd_debug(MD_MMV_MISC, "timeout_ini: (%d, 0x%llx-%d)\n", MSGID_ELEMS(mid)); /* * Give the result the corresponding msgid from the failed message. */ MSGID_COPY(&mid, &(resultp->mmr_msgid)); /* return to mdmn_send_message() and let it deal with the situation */ mdmn_svc_sendreply(transp, xdr_md_mn_result_t, (char *)resultp); free(resultp); commd_debug(MD_MMV_MISC, "timeout_ini: sendreplied\n"); svc_done(transp); mdmn_unregister_initiator_table(setno, class); } /* * check_timeouts - thread * * This implements a timeout surveillance for messages sent from the * initiator to the master. * * If a message is started, this thread is triggered thru * cond_signal(&check_timeout_cv) and we keep track of the numbers of * messages that are outstanding (messages_on_their_way). * * As long as there are messages on their way, this thread never goes to sleep. * It'll keep checking all class/set combinations for outstanding messages. * If one is found, it's checked if this message is overdue. In that case, * timeout_initiator() is called to wakeup the calling mdmn_send_message and * to clean up the mess. * * If the result from the master arrives later, this message is considered * to be unsolicited. And will be ignored. */ void check_timeouts() { set_t setno; time_t now, then; mutex_t *mx; md_mn_msgclass_t class; for (; ; ) { now = time((time_t *)NULL); for (setno = 1; setno < MD_MAXSETS; setno++) { if (md_mn_set_inited[setno] != MDMN_SET_READY) { continue; } for (class = MD_MSG_CLASS1; class < MD_MN_NCLASSES; class++) { mx = mdmn_get_initiator_table_mx(setno, class); mutex_lock(mx); /* then is the registered time */ then = mdmn_get_initiator_table_time(setno, class); if ((then != 0) && (now > then)) { timeout_initiator(setno, class); } mutex_unlock(mx); } } /* it's ok to check only once per second */ sleep(1); /* is there work to do? */ mutex_lock(&check_timeout_mutex); if (messages_on_their_way == 0) { cond_wait(&check_timeout_cv, &check_timeout_mutex); } mutex_unlock(&check_timeout_mutex); } } void setup_debug(void) { char *tmp_dir; /* Read in the debug-controlling tokens from runtime.cf */ md_commd_global_verb = commd_get_verbosity(); /* * If the user didn't specify a verbosity level in runtime.cf * we can safely return here. As we don't intend to printout * debug messages, we don't need to check for the output file. */ if (md_commd_global_verb == 0) { return; } /* if commdout is non-NULL it is an open FILE, we'd better close it */ if (commdout != (FILE *)NULL) { fclose(commdout); } commdoutfile = commd_get_outfile(); /* setup the debug output */ if (commdoutfile == (char *)NULL) { /* if no valid file was specified, use the default */ commdoutfile = "/var/run/commd.out"; commdout = fopen(commdoutfile, "a"); } else { /* check if the directory exists and is writable */ tmp_dir = strdup(commdoutfile); if ((access(dirname(tmp_dir), X_OK|W_OK)) || ((commdout = fopen(commdoutfile, "a")) == (FILE *)NULL)) { syslog(LOG_ERR, "Can't write to specified output file %s,\n" "using /var/run/commd.out instead\n", commdoutfile); free(commdoutfile); commdoutfile = "/var/run/commd.out"; commdout = fopen(commdoutfile, "a"); } free(tmp_dir); } if (commdout == (FILE *)NULL) { syslog(LOG_ERR, "Can't write to debug output file %s\n", commdoutfile); } } /* * mdmn_is_node_dead checks to see if a node is dead using * the SunCluster infrastructure which is a stable interface. * If unable to contact SunCuster the node is assumed to be alive. * Return values: * 1 - node is dead * 0 - node is alive */ int mdmn_is_node_dead(md_mnnode_desc *node) { char *fmt = "/usr/cluster/bin/scha_cluster_get -O NODESTATE_NODE "; char *cmd; size_t size; char buf[10]; FILE *ptr; int retval = 0; /* I know that I'm alive */ if (strcmp(node->nd_nodename, mynode()) == 0) return (retval); size = strlen(fmt) + strlen(node->nd_nodename) + 1; cmd = Zalloc(size); (void) strlcat(cmd, fmt, size); (void) strlcat(cmd, node->nd_nodename, size); if ((ptr = popen(cmd, "r")) != NULL) { if (fgets(buf, sizeof (buf), ptr) != NULL) { /* If scha_cluster_get returned DOWN - return dead */ if (strncmp(buf, "DOWN", 4) == 0) retval = 1; } (void) pclose(ptr); } Free(cmd); return (retval); } /* * global_init() * * Perform some global initializations. * * the following routines have to call this before operation can start: * - mdmn_send_svc_2 * - mdmn_work_svc_2 * - mdmn_comm_lock_svc_2 * - mdmn_comm_unlock_svc_2 * - mdmn_comm_suspend_svc_2 * - mdmn_comm_resume_svc_2 * - mdmn_comm_reinit_set_svc_2 * * This is a single threaded daemon, so it can only be in one of the above * routines at the same time. * This means, global_init() cannot be called more than once at the same time. * Hence, no lock is needed. */ void global_init(void) { set_t set; md_mn_msgclass_t class; struct sigaction sighandler; time_t clock_val; struct rlimit commd_limit; /* Do these global initializations only once */ if (md_commd_global_state & MD_CGS_INITED) { return; } (void) sdssc_bind_library(); /* setup the debug options from the config file */ setup_debug(); /* make sure that we don't run out of file descriptors */ commd_limit.rlim_cur = commd_limit.rlim_max = RLIM_INFINITY; if (setrlimit(RLIMIT_NOFILE, &commd_limit) != 0) { syslog(LOG_WARNING, gettext("setrlimit failed." "Could not increase the max file descriptors")); } /* Make setup_debug() be the action in case of SIGHUP */ sighandler.sa_flags = 0; sigfillset(&sighandler.sa_mask); sighandler.sa_handler = (void (*)(int)) setup_debug; sigaction(SIGHUP, &sighandler, NULL); __savetime = gethrtime(); (void) time(&clock_val); commd_debug(MD_MMV_MISC, "global init called %s\n", ctime(&clock_val)); /* start a thread that flushes out the debug on a regular basis */ thr_create(NULL, 0, (void *(*)(void *))flush_fcout, (void *) NULL, THR_DETACHED, NULL); /* global rwlock's / mutex's / cond_t's go here */ mutex_init(&check_timeout_mutex, USYNC_THREAD, NULL); cond_init(&check_timeout_cv, USYNC_THREAD, NULL); mutex_init(&get_setdesc_mutex, USYNC_THREAD, NULL); /* Make sure the initiator table is initialized correctly */ for (set = 0; set < MD_MAXSETS; set++) { for (class = 0; class < MD_MN_NCLASSES; class++) { mdmn_unregister_initiator_table(set, class); } } /* setup the check for timeouts */ thr_create(NULL, 0, (void *(*)(void *))check_timeouts, (void *) NULL, THR_DETACHED, NULL); md_commd_global_state |= MD_CGS_INITED; } /* * mdmn_init_client(setno, nodeid) * called if client[setno][nodeid] is NULL * * NOTE: Must be called with set_desc_rwlock held as a reader * NOTE: Must be called with client_rwlock held as a writer * * If the rpc client for this node has not been setup for any set, we do it now. * * Returns 0 on success (node found in set, rpc client setup) * -1 if metaget_setdesc failed, * -2 if node not part of set * -3 if clnt_create fails */ static int mdmn_init_client(set_t setno, md_mn_nodeid_t nid) { md_error_t ep = mdnullerror; md_mnnode_desc *node; md_set_desc *sd; /* just an abbr for set_descriptor[setno] */ sd = set_descriptor[setno]; /* * Is the appropriate set_descriptor already initialized ? * Can't think of a scenario where this is not the case, but we'd better * check for it anyway. */ if (sd == NULL) { mdsetname_t *sp; rw_unlock(&set_desc_rwlock[setno]); /* readlock -> writelock */ rw_wrlock(&set_desc_rwlock[setno]); sp = metasetnosetname(setno, &ep); /* Only one thread is supposed to be in metaget_setdesc() */ mutex_lock(&get_setdesc_mutex); sd = metaget_setdesc(sp, &ep); mutex_unlock(&get_setdesc_mutex); if (sd == NULL) { rw_unlock(&set_desc_rwlock[setno]); /* back to ... */ rw_rdlock(&set_desc_rwlock[setno]); /* ... readlock */ return (-1); } set_descriptor[setno] = sd; rw_unlock(&set_desc_rwlock[setno]); /* back to readlock */ rw_rdlock(&set_desc_rwlock[setno]); } /* first we have to find the node name for this node id */ for (node = sd->sd_nodelist; node; node = node->nd_next) { if (node->nd_nodeid == nid) break; /* we found our node in this set */ } if (node == (md_mnnode_desc *)NULL) { commd_debug(MD_MMV_SYSLOG, "FATAL: node %d not found in set %d\n", nid, setno); rw_unlock(&set_desc_rwlock[setno]); return (-2); } commd_debug(MD_MMV_INIT, "init: %s has the flags: 0x%x\n", node->nd_nodename ? node->nd_nodename : "NULL", node->nd_flags); /* Did this node join the diskset? */ if ((node->nd_flags & MD_MN_NODE_OWN) == 0) { commd_debug(MD_MMV_INIT, "init: %s didn't join set %d\n", node->nd_nodename ? node->nd_nodename : "NULL", setno); rw_unlock(&set_desc_rwlock[setno]); return (-2); } /* if clnt_create has not been done for that node, do it now */ if (client[setno][nid] == (CLIENT *) NULL) { time_t tout = 0; /* * While trying to create a connection to a node, * periodically check to see if the node has been marked * dead by the SunCluster infrastructure. * This periodic check is needed since a non-responsive * rpc.mdcommd (while it is attempting to create a connection * to a dead node) can lead to large delays and/or failures * in the reconfig steps. */ while ((client[setno][nid] == (CLIENT *) NULL) && (tout < MD_CLNT_CREATE_TOUT)) { client[setno][nid] = meta_client_create_retry( node->nd_nodename, mdmn_clnt_create, (void *) node, MD_CLNT_CREATE_SUBTIMEOUT, &ep); /* Is the node dead? */ if (mdmn_is_node_dead(node) == 1) { commd_debug(MD_MMV_SYSLOG, "rpc.mdcommd: no client for dead node %s\n", node->nd_nodename); break; } else tout += MD_CLNT_CREATE_SUBTIMEOUT; } if (client[setno][nid] == (CLIENT *) NULL) { clnt_pcreateerror(node->nd_nodename); rw_unlock(&set_desc_rwlock[setno]); return (-3); } /* this node has the license to send */ commd_debug(MD_MMV_MISC, "init_client: calling add_lic\n"); add_license(node); /* set the timeout value */ clnt_control(client[setno][nid], CLSET_TIMEOUT, (char *)&FOUR_SECS); } rw_unlock(&set_desc_rwlock[setno]); return (0); } /* * check_client(setno, nodeid) * * must be called with reader lock held for set_desc_rwlock[setno] * and must be called with reader lock held for client_rwlock[setno] * Checks if the client for this set/node combination is already setup * if not it upgrades the lock to a writer lock * and tries to initialize the client. * Finally it's checked if the client nulled out again due to some race * * returns 0 if there is a usable client * returns MDMNE_RPC_FAIL otherwise */ static int check_client(set_t setno, md_mn_nodeid_t nodeid) { int ret = 0; while ((client[setno][nodeid] == (CLIENT *)NULL) && (ret == 0)) { rw_unlock(&client_rwlock[setno]); /* upgrade reader ... */ rw_wrlock(&client_rwlock[setno]); /* ... to writer lock. */ if (mdmn_init_client(setno, nodeid) != 0) { ret = MDMNE_RPC_FAIL; } rw_unlock(&client_rwlock[setno]); /* downgrade writer ... */ rw_rdlock(&client_rwlock[setno]); /* ... back to reader lock. */ } return (ret); } /* * mdmn_init_set(setno, todo) * setno is the number of the set to be initialized. * todo is one of the MDMN_SET_* thingies or MDMN_SET_READY * If called with MDMN_SET_READY everything is initialized. * * If the set mutexes are already initialized, the caller has to hold * both set_desc_rwlock[setno] and client_rwlock[setno] as a writer, before * calling mdmn_init_set() */ int mdmn_init_set(set_t setno, int todo) { int class; md_mnnode_desc *node; md_set_desc *sd; /* just an abbr for set_descriptor[setno] */ mdsetname_t *sp; md_error_t ep = mdnullerror; md_mn_nodeid_t nid; /* * Check if we are told to setup the mutexes and * if these are not yet setup */ if ((todo & MDMN_SET_MUTEXES) && ((md_mn_set_inited[setno] & MDMN_SET_MUTEXES) == 0)) { mutex_init(&mdmn_busy_mutex[setno], USYNC_THREAD, NULL); cond_init(&mdmn_busy_cv[setno], USYNC_THREAD, NULL); rwlock_init(&client_rwlock[setno], USYNC_THREAD, NULL); rwlock_init(&set_desc_rwlock[setno], USYNC_THREAD, NULL); for (class = MD_MSG_CLASS1; class < MD_MN_NCLASSES; class++) { mutex_init(mdmn_get_master_table_mx(setno, class), USYNC_THREAD, NULL); cond_init(mdmn_get_master_table_cv(setno, class), USYNC_THREAD, NULL); mutex_init(mdmn_get_initiator_table_mx(setno, class), USYNC_THREAD, NULL); } md_mn_set_inited[setno] |= MDMN_SET_MUTEXES; } if ((todo & MDMN_SET_MCT) && ((md_mn_set_inited[setno] & MDMN_SET_MCT) == 0)) { int fd; size_t filesize; caddr_t addr; char table_name[32]; filesize = (sizeof (md_mn_mct_t)); (void) snprintf(table_name, sizeof (table_name), "%s%d", MD_MN_MSG_COMP_TABLE, setno); /* * If the mct file exists we map it into memory. * Otherwise we create an empty file of appropriate * size and map that into memory. * The mapped areas are stored in mct[setno]. */ fd = open(table_name, O_RDWR|O_CREAT|O_DSYNC, 0600); if (fd < 0) { commd_debug(MD_MMV_MISC, "init_set: Can't open MCT\n"); return (-1); } /* * To ensure that the file has the appropriate size, * we write a byte at the end of the file. */ lseek(fd, filesize + 1, SEEK_SET); write(fd, "\0", 1); /* at this point we have a file in place that we can mmap */ addr = mmap(0, filesize, PROT_READ | PROT_WRITE, MAP_SHARED, fd, (off_t)0); if (addr == MAP_FAILED) { commd_debug(MD_MMV_INIT, "init_set: mmap mct error %d\n", errno); return (-1); } /* LINTED pointer alignment */ mct[setno] = (md_mn_mct_t *)addr; /* finally we initialize the mutexes that protect the mct */ for (class = MD_MSG_CLASS1; class < MD_MN_NCLASSES; class++) { mutex_init(&(mct_mutex[setno][class]), USYNC_THREAD, NULL); } md_mn_set_inited[setno] |= MDMN_SET_MCT; } /* * Check if we are told to setup the nodes and * if these are not yet setup * (Attention: negative logic here compared to above!) */ if (((todo & MDMN_SET_NODES) == 0) || (md_mn_set_inited[setno] & MDMN_SET_NODES)) { return (0); /* success */ } if ((sp = metasetnosetname(setno, &ep)) == NULL) { commd_debug(MD_MMV_SYSLOG, "metasetnosetname(%d) returned NULL\n", setno); return (MDMNE_NOT_JOINED); } /* flush local copy of rpc.metad data */ metaflushsetname(sp); mutex_lock(&get_setdesc_mutex); sd = metaget_setdesc(sp, &ep); mutex_unlock(&get_setdesc_mutex); if (sd == NULL) { commd_debug(MD_MMV_SYSLOG, "metaget_setdesc(%d) returned NULL\n", setno); return (MDMNE_NOT_JOINED); } /* * if this set is not a multinode set or * this node didn't join yet the diskset, better don't do anything */ if ((MD_MNSET_DESC(sd) == 0) || (sd->sd_mn_mynode->nd_flags & MD_MN_NODE_OWN) == 0) { commd_debug(MD_MMV_INIT, "didn't yet join set %d\n", setno); return (MDMNE_NOT_JOINED); } for (node = sd->sd_nodelist; node != NULL; node = node->nd_next) { time_t tout = 0; nid = node->nd_nodeid; commd_debug(MD_MMV_INIT, "setting up: node=%s, priv_ic=%s, flags=0x%x\n", node->nd_nodename ? node->nd_nodename : "NULL", node->nd_priv_ic ? node->nd_priv_ic : "NULL", node->nd_flags); if ((node->nd_flags & MD_MN_NODE_OWN) == 0) { commd_debug(MD_MMV_INIT, "init: %s didn't join set %d\n", node->nd_nodename ? node->nd_nodename : "NULL", setno); continue; } if (client[setno][nid] != (CLIENT *) NULL) { /* already inited */ commd_debug(MD_MMV_INIT, "init: already: node=%s\n", node->nd_nodename ? node->nd_nodename : "NULL"); continue; } /* * While trying to create a connection to a node, * periodically check to see if the node has been marked * dead by the SunCluster infrastructure. * This periodic check is needed since a non-responsive * rpc.mdcommd (while it is attempting to create a connection * to a dead node) can lead to large delays and/or failures * in the reconfig steps. */ while ((client[setno][nid] == (CLIENT *) NULL) && (tout < MD_CLNT_CREATE_TOUT)) { client[setno][nid] = meta_client_create_retry( node->nd_nodename, mdmn_clnt_create, (void *) node, MD_CLNT_CREATE_SUBTIMEOUT, &ep); /* Is the node dead? */ if (mdmn_is_node_dead(node) == 1) { commd_debug(MD_MMV_SYSLOG, "rpc.mdcommd: no client for dead node %s\n", node->nd_nodename); break; } else tout += MD_CLNT_CREATE_SUBTIMEOUT; } if (client[setno][nid] == (CLIENT *) NULL) { clnt_pcreateerror(node->nd_nodename); /* * If we cannot connect to a single node * (maybe because it is down) we mark this node as not * owned and continue with the next node in the list. * This is better than failing the entire starting up * of the commd system. */ node->nd_flags &= ~MD_MN_NODE_OWN; commd_debug(MD_MMV_SYSLOG, "WARNING couldn't create client for %s\n" "Reconfig cycle required\n", node->nd_nodename); commd_debug(MD_MMV_INIT, "WARNING couldn't create client for %s\n" "Reconfig cycle required\n", node->nd_nodename); continue; } /* this node has the license to send */ commd_debug(MD_MMV_MISC, "init_set: calling add_lic\n"); add_license(node); /* set the timeout value */ clnt_control(client[setno][nid], CLSET_TIMEOUT, (char *)&FOUR_SECS); commd_debug(MD_MMV_INIT, "init: done: node=%s\n", node->nd_nodename ? node->nd_nodename : "NULL"); } set_descriptor[setno] = sd; md_mn_set_inited[setno] |= MDMN_SET_NODES; return (0); /* success */ } void * mdmn_send_to_work(void *arg) { int *rpc_err = NULL; int success; int try_master; set_t setno; mutex_t *mx; /* protection for initiator_table */ SVCXPRT *transp; md_mn_msg_t *msg; md_mn_nodeid_t set_master; md_mn_msgclass_t class; md_mn_msg_and_transp_t *matp = (md_mn_msg_and_transp_t *)arg; msg = matp->mat_msg; transp = matp->mat_transp; class = mdmn_get_message_class(msg->msg_type); setno = msg->msg_setno; /* set the sender, so the master knows who to send the results */ rw_rdlock(&set_desc_rwlock[setno]); msg->msg_sender = set_descriptor[setno]->sd_mn_mynode->nd_nodeid; set_master = set_descriptor[setno]->sd_mn_master_nodeid; mx = mdmn_get_initiator_table_mx(setno, class); mutex_lock(mx); /* * Here we check, if the initiator table slot for this set/class * combination is free to use. * If this is not the case, we return CLASS_BUSY forcing the * initiating send_message call to retry */ success = mdmn_check_initiator_table(setno, class); if (success == MDMNE_CLASS_BUSY) { md_mn_msgid_t active_mid; mdmn_get_initiator_table_id(setno, class, &active_mid); commd_debug(MD_MMV_SEND, "send_to_work: received but locally busy " "(%d, 0x%llx-%d), set=%d, class=%d, type=%d, " "active msg=(%d, 0x%llx-%d)\n", MSGID_ELEMS(msg->msg_msgid), setno, class, msg->msg_type, MSGID_ELEMS(active_mid)); } else { commd_debug(MD_MMV_SEND, "send_to_work: received (%d, 0x%llx-%d), " "set=%d, class=%d, type=%d\n", MSGID_ELEMS(msg->msg_msgid), setno, class, msg->msg_type); } try_master = 2; /* return failure after two retries */ while ((success == MDMNE_ACK) && (try_master--)) { rw_rdlock(&client_rwlock[setno]); /* is the rpc client to the master still around ? */ if (check_client(setno, set_master)) { success = MDMNE_RPC_FAIL; FLUSH_DEBUGFILE(); rw_unlock(&client_rwlock[setno]); break; /* out of try_master-loop */ } /* * Send the request to the work function on the master * this call will return immediately */ rpc_err = mdmn_work_2(msg, client[setno][set_master], set_master); /* Everything's Ok? */ if (rpc_err == NULL) { success = MDMNE_RPC_FAIL; /* * Probably something happened to the daemon on the * master. Kill the client, and try again... */ rw_unlock(&client_rwlock[setno]); rw_wrlock(&client_rwlock[setno]); mdmn_clnt_destroy(client[setno][set_master]); if (client[setno][set_master] != (CLIENT *)NULL) { client[setno][set_master] = (CLIENT *)NULL; } rw_unlock(&client_rwlock[setno]); continue; } else if (*rpc_err != MDMNE_ACK) { /* something went wrong, break out */ success = *rpc_err; free(rpc_err); rw_unlock(&client_rwlock[setno]); break; /* out of try_master-loop */ } rw_unlock(&client_rwlock[setno]); free(rpc_err); /* * If we are here, we sucessfully delivered the message. * We register the initiator_table, so that * wakeup_initiator_2 can do the sendreply with the * results for us. */ success = MDMNE_ACK; mdmn_register_initiator_table(setno, class, msg, transp); /* tell check_timeouts, there's work to do */ mutex_lock(&check_timeout_mutex); messages_on_their_way++; cond_signal(&check_timeout_cv); mutex_unlock(&check_timeout_mutex); break; /* out of try_master-loop */ } rw_unlock(&set_desc_rwlock[setno]); if (success == MDMNE_ACK) { commd_debug(MD_MMV_SEND, "send_to_work: registered (%d, 0x%llx-%d)\n", MSGID_ELEMS(msg->msg_msgid)); } else { /* In case of failure do the sendreply now */ md_mn_result_t *resultp; resultp = Zalloc(sizeof (md_mn_result_t)); resultp->mmr_comm_state = success; /* * copy the MSGID so that we know _which_ message * failed (if the transp has got mangled) */ MSGID_COPY(&(msg->msg_msgid), &(resultp->mmr_msgid)); mdmn_svc_sendreply(transp, xdr_md_mn_result_t, (char *)resultp); commd_debug(MD_MMV_SEND, "send_to_work: not registered (%d, 0x%llx-%d) cs=%d\n", MSGID_ELEMS(msg->msg_msgid), success); free_result(resultp); /* * We don't have a timeout registered to wake us up, so we're * now done with this handle. Release it back to the pool. */ svc_done(transp); } free_msg(msg); /* the alloc was done in mdmn_send_svc_2 */ Free(matp); mutex_unlock(mx); return (NULL); } /* * do_message_locally(msg, result) * Process a message locally on the master * Lookup the MCT if the message has already been processed. * If not, call the handler and store the result * If yes, retrieve the result from the MCT. * Return: * MDMNE_ACK in case of success * MDMNE_LOG_FAIL if the MCT could not be checked */ static int do_message_locally(md_mn_msg_t *msg, md_mn_result_t *result) { int completed; set_t setno; md_mn_msgtype_t msgtype = msg->msg_type; md_mn_msgclass_t class; void (*handler)(md_mn_msg_t *msg, uint_t flags, md_mn_result_t *res); handler = mdmn_get_handler(msgtype); if (handler == NULL) { result->mmr_exitval = 0; /* let the sender decide if this is an error or not */ result->mmr_comm_state = MDMNE_NO_HANDLER; return (MDMNE_NO_HANDLER); } class = mdmn_get_message_class(msg->msg_type); setno = msg->msg_setno; result->mmr_msgtype = msgtype; result->mmr_flags = msg->msg_flags; MSGID_COPY(&(msg->msg_msgid), &(result->mmr_msgid)); mutex_lock(&mct_mutex[setno][class]); completed = mdmn_check_completion(msg, result); if (completed == MDMN_MCT_NOT_DONE) { /* message not yet processed locally */ commd_debug(MD_MMV_PROC_M, "proc_mas: " "calling handler for (%d,0x%llx-%d) type %d\n", MSGID_ELEMS(msg->msg_msgid), msgtype); /* * Mark the message as being currently processed, * so we won't start a second handler for it */ (void) mdmn_mark_completion(msg, NULL, MDMN_MCT_IN_PROGRESS); mutex_unlock(&mct_mutex[setno][class]); /* here we actually process the message on the master */ (*handler)(msg, MD_MSGF_ON_MASTER, result); commd_debug(MD_MMV_PROC_M, "proc_mas: " "finished handler for (%d,0x%llx-%d) type %d\n", MSGID_ELEMS(msg->msg_msgid), msgtype); /* Mark the message as fully processed, store the result */ mutex_lock(&mct_mutex[setno][class]); (void) mdmn_mark_completion(msg, result, MDMN_MCT_DONE); } else if (completed == MDMN_MCT_DONE) { commd_debug(MD_MMV_PROC_M, "proc_mas: " "result for (%d, 0x%llx-%d) from MCT\n", MSGID_ELEMS(msg->msg_msgid), msgtype); } else if (completed == MDMN_MCT_IN_PROGRESS) { commd_debug(MD_MMV_PROC_M, "proc_mas: " "(%d, 0x%llx-%d) is currently being processed\n", MSGID_ELEMS(msg->msg_msgid), msgtype); } else { /* MCT error occurred (should never happen) */ mutex_unlock(&mct_mutex[setno][class]); result->mmr_comm_state = MDMNE_LOG_FAIL; commd_debug(MD_MMV_SYSLOG, "WARNING " "mdmn_check_completion returned %d " "for (%d,0x%llx-%d)\n", completed, MSGID_ELEMS(msg->msg_msgid)); return (MDMNE_LOG_FAIL); } mutex_unlock(&mct_mutex[setno][class]); return (MDMNE_ACK); } /* * do_send_message(msg, node) * * Send a message to a given node and wait for a acknowledgment, that the * message has arrived on the remote node. * Make sure that the client for the set is setup correctly. * If no ACK arrives, destroy and recreate the RPC client and retry the * message one time * After actually sending wait no longer than the appropriate number of * before timing out the message. * * Note must be called with set_desc_wrlock held in reader mode */ static int do_send_message(md_mn_msg_t *msg, md_mnnode_desc *node) { int err; int rpc_retries; int timeout_retries = 0; int *ret = NULL; set_t setno; cond_t *cv; /* see mdmn_wakeup_master_svc_2 */ mutex_t *mx; /* protection for class_busy */ timestruc_t timeout; /* surveillance for remote daemon */ md_mn_nodeid_t nid; md_mn_msgtype_t msgtype; md_mn_msgclass_t class; nid = node->nd_nodeid; msgtype = msg->msg_type; setno = msg->msg_setno; class = mdmn_get_message_class(msgtype); mx = mdmn_get_master_table_mx(setno, class); cv = mdmn_get_master_table_cv(setno, class); retry_rpc: /* We try two times to send the message */ rpc_retries = 2; /* * if sending the message doesn't succeed the first time due to a * RPC problem, we retry one time */ while ((rpc_retries != 0) && (ret == NULL)) { /* in abort state, we error out immediately */ if (md_commd_global_state & MD_CGS_ABORTED) { return (MDMNE_ABORT); } rw_rdlock(&client_rwlock[setno]); /* unable to create client? Ignore it */ if (check_client(setno, nid)) { /* * In case we cannot establish an RPC client, we * take this node out of our considerations. * This will be reset by a reconfig * cycle that should come pretty soon. * MNISSUE: Should a reconfig cycle * be forced on SunCluster? */ node->nd_flags &= ~MD_MN_NODE_OWN; commd_debug(MD_MMV_SYSLOG, "WARNING couldn't create client for %s\n" "Reconfig cycle required\n", node->nd_nodename); commd_debug(MD_MMV_PROC_M, "proc_mas: (%d,0x%llx-%d) " "WARNING couldn't create client for %s\n", MSGID_ELEMS(msg->msg_msgid), node->nd_nodename); rw_unlock(&client_rwlock[setno]); return (MDMNE_IGNORE_NODE); } /* let's be paranoid and check again before sending */ if (client[setno][nid] == NULL) { /* * if this is true, strange enough, we catch our breath, * and then continue, so that the client is set up * once again. */ commd_debug(MD_MMV_PROC_M, "client is NULL\n"); rw_unlock(&client_rwlock[setno]); sleep(1); continue; } /* send it over, it will return immediately */ ret = mdmn_work_2(msg, client[setno][nid], nid); rw_unlock(&client_rwlock[setno]); if (ret != NULL) { commd_debug(MD_MMV_PROC_M, "proc_mas: sending (%d,0x%llx-%d) to %d returned " " 0x%x\n", MSGID_ELEMS(msg->msg_msgid), nid, *ret); } else { commd_debug(MD_MMV_PROC_M, "proc_mas: sending (%d,0x%llx-%d) to %d returned " " NULL \n", MSGID_ELEMS(msg->msg_msgid), nid); } if ((ret == NULL) || (*ret == MDMNE_CANNOT_CONNECT) || (*ret == MDMNE_THR_CREATE_FAIL)) { /* * Something happened to the daemon on the other side. * Kill the client, and try again. * check_client() will create a new client */ rw_wrlock(&client_rwlock[setno]); mdmn_clnt_destroy(client[setno][nid]); if (client[setno][nid] != (CLIENT *)NULL) { client[setno][nid] = (CLIENT *)NULL; } rw_unlock(&client_rwlock[setno]); /* ... but don't try infinitely */ --rpc_retries; continue; } /* * If the class is locked on the other node, keep trying. * This situation will go away automatically, * if we wait long enough */ if (*ret == MDMNE_CLASS_LOCKED) { sleep(1); free(ret); ret = NULL; continue; } } if (ret == NULL) { return (MDMNE_RPC_FAIL); } /* if the slave is in abort state, we just ignore it. */ if (*ret == MDMNE_ABORT) { commd_debug(MD_MMV_PROC_M, "proc_mas: work(%d,0x%llx-%d) returned " "MDMNE_ABORT\n", MSGID_ELEMS(msg->msg_msgid)); free(ret); return (MDMNE_IGNORE_NODE); } /* Did the remote processing succeed? */ if (*ret != MDMNE_ACK) { /* * Some commd failure in the middle of sending the msg * to the nodes. We don't continue here. */ commd_debug(MD_MMV_PROC_M, "proc_mas: work(%d,0x%llx-%d) returns %d\n", MSGID_ELEMS(msg->msg_msgid), *ret); free(ret); return (MDMNE_RPC_FAIL); } free(ret); ret = NULL; /* * When we are here, we have sent the message to the other node and * we know that node has accepted it. * We go to sleep and have trust to be woken up by wakeup. * If we wakeup due to a timeout, or a signal, no result has been * placed in the appropriate slot. * If we timeout, it is likely that this is because the node has * gone away, so we will destroy the client and try it again in the * expectation that the rpc will fail and we will return * MDMNE_IGNORE_NODE. If that is not the case, the message must still * be being processed on the slave. In this case just timeout for 4 * more seconds and then return RPC_FAIL if the message is not complete. */ timeout.tv_nsec = 0; timeout.tv_sec = (timeout_retries == 0) ? mdmn_get_timeout(msgtype) : FOUR_SECS.tv_sec; err = cond_reltimedwait(cv, mx, &timeout); if (err == 0) { /* everything's fine, return success */ return (MDMNE_ACK); } if (err == ETIME) { commd_debug(MD_MMV_PROC_M, "proc_mas: " "timeout occured, set=%d, class=%d, " "msgid=(%d, 0x%llx-%d), timeout_retries=%d\n", setno, class, MSGID_ELEMS(msg->msg_msgid), timeout_retries); if (timeout_retries == 0) { timeout_retries++; /* * Destroy the client and try the rpc call again */ rw_wrlock(&client_rwlock[setno]); mdmn_clnt_destroy(client[setno][nid]); client[setno][nid] = (CLIENT *)NULL; rw_unlock(&client_rwlock[setno]); goto retry_rpc; } } else if (err == EINTR) { commd_debug(MD_MMV_PROC_M, "proc_mas: " "commd signalled, set=%d, class=%d, " "msgid=(%d, 0x%llx-%d)\n", setno, class, MSGID_ELEMS(msg->msg_msgid)); } else { commd_debug(MD_MMV_PROC_M, "proc_mas: " "cond_reltimedwait err=%d, set=%d, " "class=%d, msgid=(%d, 0x%llx-%d)\n", err, setno, class, MSGID_ELEMS(msg->msg_msgid)); } /* some failure happened */ return (MDMNE_RPC_FAIL); } /* * before we return we have to * free_msg(msg); because we are working on a copied message */ void mdmn_master_process_msg(md_mn_msg_t *msg) { int *ret; int err; int nmsgs; /* total number of msgs */ int curmsg; /* index of current msg */ set_t setno; uint_t inherit_flags = 0; uint_t secdiff, usecdiff; /* runtime of this message */ md_error_t mde = mdnullerror; md_mn_msg_t *msglist[MAX_SUBMESSAGES]; /* all msgs to process */ md_mn_msg_t *cmsg; /* current msg */ md_mn_msgid_t dummyid; md_mn_result_t *result; md_mn_result_t *slave_result; md_mn_nodeid_t sender; md_mn_nodeid_t set_master; md_mnnode_desc *node; md_mn_msgtype_t orig_type; /* type of the original message */ md_mn_msgtype_t msgtype; /* type of the current message */ md_mn_msgclass_t orig_class; /* class of the original message */ md_mn_msgclass_t class; /* class of the current message */ int (*smgen)(md_mn_msg_t *msg, md_mn_msg_t **msglist); orig_type = msgtype = msg->msg_type; sender = msg->msg_sender; setno = msg->msg_setno; result = Zalloc(sizeof (md_mn_result_t)); result->mmr_setno = setno; result->mmr_msgtype = msgtype; MSGID_COPY(&(msg->msg_msgid), &(result->mmr_msgid)); orig_class = mdmn_get_message_class(msgtype); commd_debug(MD_MMV_PROC_M, "proc_mas: received (%d, 0x%llx-%d) set=%d, class=%d, type=%d\n", MSGID_ELEMS(msg->msg_msgid), setno, orig_class, msgtype); rw_rdlock(&set_desc_rwlock[setno]); set_master = set_descriptor[setno]->sd_mn_master_nodeid; result->mmr_sender = set_master; /* * Put message into the change log unless told otherwise * Note that we only log original messages. * If they are generated by some smgen, we don't log them! * Replay messages aren't logged either. * Note, that replay messages are unlogged on completion. */ if ((msg->msg_flags & (MD_MSGF_NO_LOG | MD_MSGF_REPLAY_MSG)) == 0) { commd_debug(MD_MMV_PROC_M, "proc_mas: calling log_msg for (%d,0x%llx-%d) type %d\n", MSGID_ELEMS(msg->msg_msgid), msgtype); err = mdmn_log_msg(msg); if (err == MDMNE_NULL) { /* msg logged successfully */ commd_debug(MD_MMV_PROC_M, "proc_mas: " "done log_msg for (%d,0x%llx-%d) type %d\n", MSGID_ELEMS(msg->msg_msgid), msgtype); goto proceed; } if (err == MDMNE_ACK) { /* Same msg in the slot, proceed */ commd_debug(MD_MMV_PROC_M, "proc_mas: " "already logged (%d,0x%llx-%d) type %d\n", MSGID_ELEMS(msg->msg_msgid), msgtype); goto proceed; } if (err == MDMNE_LOG_FAIL) { /* Oh, bad, the log is non functional. */ result->mmr_comm_state = MDMNE_LOG_FAIL; /* * Note that the mark_busy was already done by * mdmn_work_svc_2() */ mutex_lock(&mdmn_busy_mutex[setno]); mdmn_mark_class_unbusy(setno, orig_class); mutex_unlock(&mdmn_busy_mutex[setno]); } if (err == MDMNE_CLASS_BUSY) { /* * The log is occupied with a different message * that needs to be played first. * We reject the current message with MDMNE_CLASS_BUSY * to the initiator and do not unbusy the set/class, * because we will proceed with the logged message, * which has the same set/class combination */ result->mmr_comm_state = MDMNE_CLASS_BUSY; } ret = (int *)NULL; rw_rdlock(&client_rwlock[setno]); if (check_client(setno, sender)) { commd_debug(MD_MMV_SYSLOG, "proc_mas: No client for initiator \n"); } else { ret = mdmn_wakeup_initiator_2(result, client[setno][sender], sender); } rw_unlock(&client_rwlock[setno]); if (ret == (int *)NULL) { commd_debug(MD_MMV_SYSLOG, "proc_mas: couldn't wakeup_initiator \n"); } else { if (*ret != MDMNE_ACK) { commd_debug(MD_MMV_SYSLOG, "proc_mas: " "wakeup_initiator returned %d\n", *ret); } free(ret); } free_msg(msg); if (err == MDMNE_LOG_FAIL) { /* we can't proceed here */ free_result(result); rw_unlock(&set_desc_rwlock[setno]); return; } else if (err == MDMNE_CLASS_BUSY) { mdmn_changelog_record_t *lr; lr = mdmn_get_changelogrec(setno, orig_class); assert(lr != NULL); /* proceed with the logged message */ msg = copy_msg(&(lr->lr_msg), NULL); /* * The logged message has to have the same class but * type and sender can be different */ orig_type = msgtype = msg->msg_type; sender = msg->msg_sender; commd_debug(MD_MMV_PROC_M, "proc_mas: Got new message from change log: " "(%d,0x%llx-%d) type %d\n", MSGID_ELEMS(msg->msg_msgid), msgtype); /* continue normal operation with this message */ } } proceed: smgen = mdmn_get_submessage_generator(msgtype); if (smgen == NULL) { /* no submessages to create, just use the original message */ msglist[0] = msg; nmsgs = 1; } else { /* some bits are passed on to submessages */ inherit_flags = msg->msg_flags & MD_MSGF_INHERIT_BITS; nmsgs = smgen(msg, msglist); /* some settings for the submessages */ for (curmsg = 0; curmsg < nmsgs; curmsg++) { cmsg = msglist[curmsg]; /* Apply the inherited flags */ cmsg->msg_flags |= inherit_flags; /* * Make sure the submessage ID is set correctly * Note: first submessage has mid_smid of 1 (not 0) */ cmsg->msg_msgid.mid_smid = curmsg + 1; /* need the original class set in msgID (for MCT) */ cmsg->msg_msgid.mid_oclass = orig_class; } commd_debug(MD_MMV_PROC_M, "smgen generated %d submsgs, origclass = %d\n", nmsgs, orig_class); } /* * This big loop does the following. * For all messages: * process message on the master first (a message completion * table MCT ensures a message is not processed twice) * in case of an error break out of message loop * for all nodes -- unless MD_MSGF_NO_BCAST is set -- * send message to node until that succeeds * merge result -- not yet implemented * respect MD_MSGF_STOP_ON_ERROR */ for (curmsg = 0; curmsg < nmsgs; curmsg++) { int break_msg_loop = 0; mutex_t *mx; /* protection for class_busy */ int master_err; int master_exitval = -1; cmsg = msglist[curmsg]; msgtype = cmsg->msg_type; class = mdmn_get_message_class(msgtype); node = NULL; mx = mdmn_get_master_table_mx(setno, class); /* If we are in the abort state, we error out immediately */ if (md_commd_global_state & MD_CGS_ABORTED) { break; /* out of the message loop */ } commd_debug(MD_MMV_PROC_M, "class=%d, orig_class=%d\n", class, orig_class); /* * If the current class is different from the original class, * we have to lock it down. * The original class is already marked busy. * At this point we cannot refuse the message because the * class is busy right now, so we wait until the class becomes * available again. As soon as something changes for this set * we will be cond_signal'ed (in mdmn_mark_class_unbusy) * * Granularity could be finer (setno/class) */ if (class != orig_class) { mutex_lock(&mdmn_busy_mutex[setno]); while (mdmn_mark_class_busy(setno, class) == FALSE) { cond_wait(&mdmn_busy_cv[setno], &mdmn_busy_mutex[setno]); } mutex_unlock(&mdmn_busy_mutex[setno]); } master_err = do_message_locally(cmsg, result); if ((master_err != MDMNE_ACK) || ((master_err == MDMNE_ACK) && (result->mmr_exitval != 0))) { result->mmr_failing_node = set_master; if (cmsg->msg_flags & MD_MSGF_STOP_ON_ERROR) { /* * if appropriate, unbusy the class and * break out of the message loop */ if (class != orig_class) { mutex_lock(&mdmn_busy_mutex[setno]); mdmn_mark_class_unbusy(setno, class); mutex_unlock(&mdmn_busy_mutex[setno]); } break; } } if (master_err == MDMNE_ACK) master_exitval = result->mmr_exitval; /* No broadcast? => next message */ if (cmsg->msg_flags & MD_MSGF_NO_BCAST) { /* if appropriate, unbusy the class */ if (class != orig_class) { mutex_lock(&mdmn_busy_mutex[setno]); mdmn_mark_class_unbusy(setno, class); mutex_unlock(&mdmn_busy_mutex[setno]); } continue; } /* fake sender, so we get notified when the results are avail */ cmsg->msg_sender = set_master; /* * register to the master_table. It's needed by wakeup_master to * wakeup the sleeping thread. * Access is protected by the class lock: mdmn_mark_class_busy() */ mdmn_set_master_table_id(setno, class, &(cmsg->msg_msgid)); rw_rdlock(&set_desc_rwlock[setno]); /* Send the message to all other nodes */ for (node = set_descriptor[setno]->sd_nodelist; node; node = node->nd_next) { md_mn_nodeid_t nid = node->nd_nodeid; /* We are master and have already processed the msg */ if (node == set_descriptor[setno]->sd_mn_masternode) { continue; } /* If this node didn't join the disk set, ignore it */ if ((node->nd_flags & MD_MN_NODE_OWN) == 0) { continue; } /* If a DIRECTED message, skip non-recipient nodes */ if ((cmsg->msg_flags & MD_MSGF_DIRECTED) && nid != cmsg->msg_recipient) { continue; } mutex_lock(mx); /* * Register the node that is addressed, * so we can detect unsolicited messages */ mdmn_set_master_table_addr(setno, class, nid); slave_result = (md_mn_result_t *)NULL; /* * Now send it. do_send_message() will return if * a failure occurs or * the results are available */ err = do_send_message(cmsg, node); /* in abort state, we error out immediately */ if (md_commd_global_state & MD_CGS_ABORTED) { break; } if (err == MDMNE_ACK) { slave_result = mdmn_get_master_table_res(setno, class); commd_debug(MD_MMV_PROC_M, "proc_mas: got result for (%d,0x%llx-%d)\n", MSGID_ELEMS(cmsg->msg_msgid)); } else if (err == MDMNE_IGNORE_NODE) { mutex_unlock(mx); continue; /* send to next node */ } mutex_unlock(mx); /* * If the result is NULL, or err doesn't show success, * something went wrong with this RPC call. */ if ((slave_result == NULL) || (err != MDMNE_ACK)) { /* * If PANIC_WHEN_INCONSISTENT set, * panic if the master succeeded while * this node failed */ if ((cmsg->msg_flags & MD_MSGF_PANIC_WHEN_INCONSISTENT) && (master_err == MDMNE_ACK)) panic_system(nid, cmsg->msg_type, master_err, master_exitval, slave_result); result->mmr_failing_node = nid; /* are we supposed to stop in case of error? */ if (cmsg->msg_flags & MD_MSGF_STOP_ON_ERROR) { result->mmr_exitval = MDMNE_RPC_FAIL; commd_debug(MD_MMV_SYSLOG, "proc_mas: " "result (%d,0x%llx-%d) is NULL\n", MSGID_ELEMS(cmsg->msg_msgid)); FLUSH_DEBUGFILE(); break_msg_loop = 1; break; /* out of node loop first */ } else { /* send msg to the next node */ continue; } } /* * Message processed on remote node. * If PANIC_WHEN_INCONSISTENT set, panic if the * result is different on this node from the result * on the master */ if ((cmsg->msg_flags & MD_MSGF_PANIC_WHEN_INCONSISTENT) && ((master_err != MDMNE_ACK) || (slave_result->mmr_exitval != master_exitval))) panic_system(nid, cmsg->msg_type, master_err, master_exitval, slave_result); /* * At this point we know we have a message that was * processed on the remote node. * We now check if the exitval is non zero. * In that case we discard the previous result and * rather use the current. * This means: If a message fails on no node, * the result from the master will be returned. * There's currently no such thing as merge of results * If additionally STOP_ON_ERROR is set, we bail out */ if (slave_result->mmr_exitval != 0) { /* throw away the previously allocated result */ free_result(result); /* copy_result() allocates new memory */ result = copy_result(slave_result); free_result(slave_result); dump_result(MD_MMV_PROC_M, "proc_mas", result); result->mmr_failing_node = nid; if (cmsg->msg_flags & MD_MSGF_STOP_ON_ERROR) { break_msg_loop = 1; break; /* out of node loop */ } continue; /* try next node */ } else { /* * MNIssue: may want to merge the results * from all slaves. Currently only report * the results from the master. */ free_result(slave_result); } } /* End of loop over the nodes */ rw_unlock(&set_desc_rwlock[setno]); /* release the current class again */ if (class != orig_class) { mutex_lock(&mdmn_busy_mutex[setno]); mdmn_mark_class_unbusy(setno, class); mutex_unlock(&mdmn_busy_mutex[setno]); } /* are we supposed to quit entirely ? */ if (break_msg_loop || (md_commd_global_state & MD_CGS_ABORTED)) { break; /* out of msg loop */ } } /* End of loop over the messages */ /* * If we are here, there's two possibilities: * - we processed all messages on all nodes without an error. * In this case we return the result from the master. * (to be implemented: return the merged result) * - we encountered an error in which case result has been * set accordingly already. */ if (md_commd_global_state & MD_CGS_ABORTED) { result->mmr_comm_state = MDMNE_ABORT; } /* * This message has been processed completely. * Remove it from the changelog. * Do this for replay messages too. * Note that the message is unlogged before waking up the * initiator. This is done for two reasons. * 1. Remove a race condition that occurs when back to back * messages are sent for the same class, the registeration is * is lost. * 2. If the initiator died but the action was completed on all the * the nodes, we want that to be marked "done" quickly. */ if ((msg->msg_flags & MD_MSGF_NO_LOG) == 0) { commd_debug(MD_MMV_PROC_M, "proc_mas: calling unlog_msg for (%d,0x%llx-%d) type %d\n", MSGID_ELEMS(msg->msg_msgid), msgtype); mdmn_unlog_msg(msg); commd_debug(MD_MMV_PROC_M, "proc_mas: done unlog_msg for (%d,0x%llx-%d) type %d\n", MSGID_ELEMS(msg->msg_msgid), msgtype); } /* * In case of submessages, we increased the submessage ID in the * result structure. We restore the message ID to the value that * the initiator is waiting for. */ result->mmr_msgid.mid_smid = 0; result->mmr_msgtype = orig_type; result->mmr_sender = set_master; /* if we have an inited client, send result */ ret = (int *)NULL; rw_rdlock(&client_rwlock[setno]); if (check_client(setno, sender)) { commd_debug(MD_MMV_SYSLOG, "proc_mas: unable to create client for initiator\n"); } else { ret = mdmn_wakeup_initiator_2(result, client[setno][sender], sender); } rw_unlock(&client_rwlock[setno]); if (ret == (int *)NULL) { commd_debug(MD_MMV_PROC_M, "proc_mas: couldn't wakeup initiator\n"); } else { if (*ret != MDMNE_ACK) { commd_debug(MD_MMV_PROC_M, "proc_mas: wakeup_initiator returned %d\n", *ret); } free(ret); } rw_unlock(&set_desc_rwlock[setno]); /* Free all submessages, if there were any */ if (nmsgs > 1) { for (curmsg = 0; curmsg < nmsgs; curmsg++) { free_msg(msglist[curmsg]); } } /* Free the result */ free_result(result); mutex_lock(&mdmn_busy_mutex[setno]); mdmn_mark_class_unbusy(setno, orig_class); mutex_unlock(&mdmn_busy_mutex[setno]); /* * We use this ioctl just to get the time in the same format as used in * the messageID. If it fails, all we get is a bad runtime output. */ (void) metaioctl(MD_IOCGUNIQMSGID, &dummyid, &mde, NULL); secdiff = (dummyid.mid_time - msg->msg_msgid.mid_time) >> 32; usecdiff = (dummyid.mid_time - msg->msg_msgid.mid_time) & 0xfffff; /* catching possible overflow */ if (usecdiff >= 1000000) { usecdiff -= 1000000; secdiff++; } commd_debug(MD_MMV_PROC_M, "proc_mas: done (%d, 0x%llx-%d) type=%02d " "%5d.%06d secs runtime\n", MSGID_ELEMS(msg->msg_msgid), orig_type, secdiff, usecdiff); /* Free the original message */ free_msg(msg); } void mdmn_slave_process_msg(md_mn_msg_t *msg) { int *ret = NULL; int completed; int retries; int successfully_returned; set_t setno; md_mn_result_t *result; md_mn_nodeid_t sender; md_mn_nodeid_t whoami; md_mn_msgtype_t msgtype; md_mn_msgclass_t class; void (*handler)(md_mn_msg_t *msg, uint_t flags, md_mn_result_t *res); setno = msg->msg_setno; sender = msg->msg_sender; /* this is always the master of the set */ msgtype = msg->msg_type; rw_rdlock(&set_desc_rwlock[setno]); whoami = set_descriptor[setno]->sd_mn_mynode->nd_nodeid; rw_unlock(&set_desc_rwlock[setno]); result = Zalloc(sizeof (md_mn_result_t)); result->mmr_flags = msg->msg_flags; result->mmr_setno = setno; result->mmr_msgtype = msgtype; result->mmr_sender = whoami; result->mmr_comm_state = MDMNE_ACK; /* Ok state */ MSGID_COPY(&(msg->msg_msgid), &(result->mmr_msgid)); class = mdmn_get_message_class(msgtype); commd_debug(MD_MMV_PROC_S, "proc_sla: received (%d, 0x%llx-%d) set=%d, class=%d, type=%d\n", MSGID_ELEMS(msg->msg_msgid), setno, class, msgtype); handler = mdmn_get_handler(msgtype); if (handler == NULL) { result->mmr_exitval = 0; /* let the sender decide if this is an error or not */ result->mmr_comm_state = MDMNE_NO_HANDLER; commd_debug(MD_MMV_PROC_S, "proc_sla: No handler for (%d, 0x%llx-%d)\n", MSGID_ELEMS(msg->msg_msgid)); } else { /* Did we already process this message ? */ mutex_lock(&mct_mutex[setno][class]); completed = mdmn_check_completion(msg, result); if (completed == MDMN_MCT_NOT_DONE) { /* message not yet processed locally */ commd_debug(MD_MMV_PROC_S, "proc_sla: calling handler for (%d, 0x%llx-%d)\n", MSGID_ELEMS(msg->msg_msgid)); /* * Mark the message as being currently processed, * so we won't start a second handler for it */ (void) mdmn_mark_completion(msg, NULL, MDMN_MCT_IN_PROGRESS); mutex_unlock(&mct_mutex[setno][class]); (*handler)(msg, MD_MSGF_ON_SLAVE, result); commd_debug(MD_MMV_PROC_S, "proc_sla: finished handler for (%d, 0x%llx-%d)\n", MSGID_ELEMS(msg->msg_msgid)); mutex_lock(&mct_mutex[setno][class]); /* Mark the message as fully done, store the result */ (void) mdmn_mark_completion(msg, result, MDMN_MCT_DONE); } else if (completed == MDMN_MCT_DONE) { /* message processed previously, got result from MCT */ commd_debug(MD_MMV_PROC_S, "proc_sla: result for (%d, 0x%llx-%d) from MCT\n", MSGID_ELEMS(msg->msg_msgid)); } else if (completed == MDMN_MCT_IN_PROGRESS) { /* * If the message is curruntly being processed, * we can return here, without sending a result back. * This will be done by the initial message handling * thread */ mutex_unlock(&mct_mutex[setno][class]); commd_debug(MD_MMV_PROC_M, "proc_sla: " "(%d, 0x%llx-%d) is currently being processed\n", MSGID_ELEMS(msg->msg_msgid), msgtype); free_msg(msg); free_result(result); return; } else { /* MCT error occurred (should never happen) */ result->mmr_comm_state = MDMNE_LOG_FAIL; commd_debug(MD_MMV_PROC_S, "proc_sla: MCT error for (%d, 0x%llx-%d)\n", MSGID_ELEMS(msg->msg_msgid)); } mutex_unlock(&mct_mutex[setno][class]); } /* * At this point we have a result (even in an error case) * that we return to the master. */ rw_rdlock(&set_desc_rwlock[setno]); retries = 2; /* we will try two times to send the results */ successfully_returned = 0; while (!successfully_returned && (retries != 0)) { ret = (int *)NULL; rw_rdlock(&client_rwlock[setno]); if (check_client(setno, sender)) { /* * If we cannot setup the rpc connection to the master, * we can't do anything besides logging this fact. */ commd_debug(MD_MMV_SYSLOG, "proc_mas: unable to create client for master\n"); rw_unlock(&client_rwlock[setno]); break; } else { ret = mdmn_wakeup_master_2(result, client[setno][sender], sender); /* * if mdmn_wakeup_master_2 returns NULL, it can be that * the master (or the commd on the master) had died. * In that case, we destroy the client to the master * and retry. * If mdmn_wakeup_master_2 doesn't return MDMNE_ACK, * the commd on the master is alive but * something else is wrong, * in that case a retry doesn't make sense => break out */ if (ret == (int *)NULL) { commd_debug(MD_MMV_PROC_S, "proc_sla: wakeup_master returned NULL\n"); /* release reader lock, grab writer lock */ rw_unlock(&client_rwlock[setno]); rw_wrlock(&client_rwlock[setno]); mdmn_clnt_destroy(client[setno][sender]); if (client[setno][sender] != (CLIENT *)NULL) { client[setno][sender] = (CLIENT *)NULL; } rw_unlock(&client_rwlock[setno]); retries--; commd_debug(MD_MMV_PROC_S, "retries = %d\n", retries); continue; } if (*ret != MDMNE_ACK) { commd_debug(MD_MMV_PROC_S, "proc_sla: " "wakeup_master returned %d\n", *ret); rw_unlock(&client_rwlock[setno]); break; } else { /* Good case */ successfully_returned = 1; rw_unlock(&client_rwlock[setno]); } } } rw_unlock(&set_desc_rwlock[setno]); commd_debug(MD_MMV_PROC_S, "proc_sla: done (%d, 0x%llx-%d)\n", MSGID_ELEMS(msg->msg_msgid)); if (ret != (int *)NULL) free(ret); free_msg(msg); free_result(result); } /* * mdmn_send_svc_2: * --------------- * Check that the issuing node is a legitimate one (i.e. is licensed to send * messages to us), that the RPC request can be staged. * * Returns: * 0 => no RPC request is in-flight, no deferred svc_sendreply() * 1 => queued RPC request in-flight. Completion will be made (later) * by a wakeup_initiator_2() [hopefully] */ int mdmn_send_svc_2(md_mn_msg_t *omsg, struct svc_req *rqstp) { int err; set_t setno; SVCXPRT *transp = rqstp->rq_xprt; md_mn_msg_t *msg; md_mn_result_t *resultp; md_mn_msgclass_t class; md_mn_msg_and_transp_t *matp; msg = copy_msg(omsg, NULL); xdr_free(xdr_md_mn_msg_t, (caddr_t)omsg); setno = msg->msg_setno; class = mdmn_get_message_class(msg->msg_type); /* If we are in the abort state, we error out immediately */ if (md_commd_global_state & MD_CGS_ABORTED) { resultp = Zalloc(sizeof (md_mn_result_t)); resultp->mmr_comm_state = MDMNE_ABORT; mdmn_svc_sendreply(transp, xdr_md_mn_result_t, (char *)resultp); free_result(resultp); svc_freeargs(transp, xdr_md_mn_msg_t, (caddr_t)msg); return (0); } /* check if the global initialization is done */ if ((md_commd_global_state & MD_CGS_INITED) == 0) { global_init(); } commd_debug(MD_MMV_SEND, "send: received (%d, 0x%llx-%d), set=%d, class=%d, type=%d\n", MSGID_ELEMS(msg->msg_msgid), setno, class, msg->msg_type); /* Check for verbosity related message */ if (msg->msg_type == MD_MN_MSG_VERBOSITY) { md_mn_verbose_t *d; d = (md_mn_verbose_t *)((void *)(msg->msg_event_data)); md_commd_global_verb = d->mmv_what; /* everytime the bitmask is set, we reset the timer */ __savetime = gethrtime(); /* * If local-only-flag is set, we are done here, * otherwise we pass that message on to the master. */ if (msg->msg_flags & MD_MSGF_LOCAL_ONLY) { resultp = Zalloc(sizeof (md_mn_result_t)); resultp->mmr_comm_state = MDMNE_ACK; mdmn_svc_sendreply(transp, xdr_md_mn_result_t, (char *)resultp); free_result(resultp); svc_freeargs(transp, xdr_md_mn_msg_t, (caddr_t)msg); return (0); } } /* * Are we entering the abort state? * Here we don't even need to check for MD_MSGF_LOCAL_ONLY, because * this message cannot be distributed anyway. * So, it's safe to return immediately. */ if (msg->msg_type == MD_MN_MSG_ABORT) { md_commd_global_state |= MD_CGS_ABORTED; resultp = Zalloc(sizeof (md_mn_result_t)); resultp->mmr_comm_state = MDMNE_ACK; mdmn_svc_sendreply(transp, xdr_md_mn_result_t, (char *)resultp); free_result(resultp); svc_freeargs(transp, xdr_md_mn_msg_t, (caddr_t)msg); return (0); } /* * Is this message type blocked? * If so we return MDMNE_CLASS_LOCKED, immediately */ if (msgtype_lock_state[msg->msg_type] == MMTL_LOCK) { resultp = Zalloc(sizeof (md_mn_result_t)); resultp->mmr_comm_state = MDMNE_CLASS_LOCKED; mdmn_svc_sendreply(transp, xdr_md_mn_result_t, (char *)resultp); free_result(resultp); svc_freeargs(transp, xdr_md_mn_msg_t, (caddr_t)msg); commd_debug(MD_MMV_SEND, "send: type locked (%d, 0x%llx-%d), set=%d, class=%d, " "type=%d\n", MSGID_ELEMS(msg->msg_msgid), setno, class, msg->msg_type); return (0); } if (md_mn_set_inited[setno] != MDMN_SET_READY) { /* Can only use the appropriate mutexes if they are inited */ if (md_mn_set_inited[setno] & MDMN_SET_MUTEXES) { rw_wrlock(&set_desc_rwlock[setno]); rw_wrlock(&client_rwlock[setno]); err = mdmn_init_set(setno, MDMN_SET_READY); rw_unlock(&client_rwlock[setno]); rw_unlock(&set_desc_rwlock[setno]); } else { err = mdmn_init_set(setno, MDMN_SET_READY); } if (err) { /* couldn't initialize connections, cannot proceed */ resultp = Zalloc(sizeof (md_mn_result_t)); resultp->mmr_comm_state = err; mdmn_svc_sendreply(transp, xdr_md_mn_result_t, (char *)resultp); svc_freeargs(transp, xdr_md_mn_msg_t, (caddr_t)msg); free_result(resultp); commd_debug(MD_MMV_SEND, "send: init err = %d\n", err); return (0); } } mutex_lock(&mdmn_busy_mutex[setno]); if ((mdmn_is_class_suspended(setno, class) == TRUE) && ((msg->msg_flags & MD_MSGF_OVERRIDE_SUSPEND) == 0)) { mutex_unlock(&mdmn_busy_mutex[setno]); resultp = Zalloc(sizeof (md_mn_result_t)); resultp->mmr_comm_state = MDMNE_SUSPENDED; mdmn_svc_sendreply(transp, xdr_md_mn_result_t, (char *)resultp); svc_freeargs(transp, xdr_md_mn_msg_t, (caddr_t)msg); free_result(resultp); commd_debug(MD_MMV_SEND, "send: class suspended (%d, 0x%llx-%d), set=%d, " "class=%d, type=%d\n", MSGID_ELEMS(msg->msg_msgid), setno, class, msg->msg_type); return (0); } mutex_unlock(&mdmn_busy_mutex[setno]); /* is this rpc request coming from the local node? */ if (check_license(rqstp, 0) == FALSE) { svc_freeargs(transp, xdr_md_mn_msg_t, (caddr_t)msg); commd_debug(MD_MMV_SEND, "send: check licence fail(%d, 0x%llx-%d), set=%d, " "class=%d, type=%d\n", MSGID_ELEMS(msg->msg_msgid), setno, class, msg->msg_type); return (0); } /* * We allocate a structure that can take two pointers in order to pass * both the message and the transp into thread_create. * The free for this alloc is done in mdmn_send_to_work() */ matp = Malloc(sizeof (md_mn_msg_and_transp_t)); matp->mat_msg = msg; matp->mat_transp = transp; /* * create a thread here that calls work on the master. * If we are already on the master, this would block if running * in the same context. (our service is single threaded)( * Make it a detached thread because it will not communicate with * anybody thru thr_* mechanisms */ thr_create(NULL, 0, mdmn_send_to_work, (void *) matp, THR_DETACHED, NULL); commd_debug(MD_MMV_SEND, "send: done (%d, 0x%llx-%d)\n", MSGID_ELEMS(msg->msg_msgid)); /* * We return here without sending results. This will be done by * mdmn_wakeup_initiator_svc_2() as soon as the results are available. * Until then the calling send_message will be blocked, while we * are able to take calls. */ return (1); } /* ARGSUSED */ int * mdmn_work_svc_2(md_mn_msg_t *omsg, struct svc_req *rqstp) { int err; set_t setno; thread_t tid; int *retval; md_mn_msg_t *msg; md_mn_msgclass_t class; retval = Malloc(sizeof (int)); /* If we are in the abort state, we error out immediately */ if (md_commd_global_state & MD_CGS_ABORTED) { xdr_free(xdr_md_mn_msg_t, (caddr_t)omsg); *retval = MDMNE_ABORT; return (retval); } msg = copy_msg(omsg, NULL); xdr_free(xdr_md_mn_msg_t, (caddr_t)omsg); /* * Is this message type blocked? * If so we return MDMNE_CLASS_LOCKED, immediately. * This check is performed on master and slave. */ if (msgtype_lock_state[msg->msg_type] == MMTL_LOCK) { *retval = MDMNE_CLASS_LOCKED; return (retval); } /* check if the global initialization is done */ if ((md_commd_global_state & MD_CGS_INITED) == 0) { global_init(); } class = mdmn_get_message_class(msg->msg_type); setno = msg->msg_setno; if (md_mn_set_inited[setno] != MDMN_SET_READY) { /* Can only use the appropriate mutexes if they are inited */ if (md_mn_set_inited[setno] & MDMN_SET_MUTEXES) { rw_wrlock(&set_desc_rwlock[setno]); rw_wrlock(&client_rwlock[setno]); err = mdmn_init_set(setno, MDMN_SET_READY); rw_unlock(&client_rwlock[setno]); rw_unlock(&set_desc_rwlock[setno]); } else { err = mdmn_init_set(setno, MDMN_SET_READY); } if (err) { *retval = MDMNE_CANNOT_CONNECT; free_msg(msg); return (retval); } } /* is this rpc request coming from a licensed node? */ if (check_license(rqstp, msg->msg_sender) == FALSE) { free_msg(msg); *retval = MDMNE_RPC_FAIL; return (retval); } commd_debug(MD_MMV_WORK, "work: received (%d, 0x%llx-%d), set=%d, class=%d, type=%d, " "flags=0x%x\n", MSGID_ELEMS(msg->msg_msgid), setno, class, msg->msg_type, msg->msg_flags); /* Check for various CLASS0 message types */ if (msg->msg_type == MD_MN_MSG_VERBOSITY) { md_mn_verbose_t *d; d = (md_mn_verbose_t *)((void *)(msg->msg_event_data)); /* for now we ignore set / class in md_mn_verbose_t */ md_commd_global_verb = d->mmv_what; /* everytime the bitmask is set, we reset the timer */ __savetime = gethrtime(); } mutex_lock(&mdmn_busy_mutex[setno]); /* check if class is locked via a call to mdmn_comm_lock_svc_2 */ if (mdmn_is_class_locked(setno, class) == TRUE) { mutex_unlock(&mdmn_busy_mutex[setno]); *retval = MDMNE_CLASS_LOCKED; free_msg(msg); return (retval); } mutex_unlock(&mdmn_busy_mutex[setno]); /* Check if the class is busy right now. Do it only on the master */ rw_rdlock(&set_desc_rwlock[setno]); if (set_descriptor[setno]->sd_mn_am_i_master) { rw_unlock(&set_desc_rwlock[setno]); /* * If the class is currently suspended, don't accept new * messages, unless they are flagged with an override bit. */ mutex_lock(&mdmn_busy_mutex[setno]); if ((mdmn_is_class_suspended(setno, class) == TRUE) && ((msg->msg_flags & MD_MSGF_OVERRIDE_SUSPEND) == 0)) { mutex_unlock(&mdmn_busy_mutex[setno]); *retval = MDMNE_SUSPENDED; commd_debug(MD_MMV_SEND, "send: set %d is suspended\n", setno); free_msg(msg); return (retval); } if (mdmn_mark_class_busy(setno, class) == FALSE) { mutex_unlock(&mdmn_busy_mutex[setno]); *retval = MDMNE_CLASS_BUSY; free_msg(msg); return (retval); } mutex_unlock(&mdmn_busy_mutex[setno]); /* * Because the real processing of the message takes time we * create a thread for it. So the master thread can continue * to run and accept further messages. */ *retval = thr_create(NULL, 0, (void *(*)(void *))mdmn_master_process_msg, (void *)msg, THR_DETACHED|THR_SUSPENDED, &tid); } else { rw_unlock(&set_desc_rwlock[setno]); *retval = thr_create(NULL, 0, (void *(*)(void *)) mdmn_slave_process_msg, (void *)msg, THR_DETACHED|THR_SUSPENDED, &tid); } if (*retval != 0) { *retval = MDMNE_THR_CREATE_FAIL; free_msg(msg); return (retval); } /* Now run the new thread */ thr_continue(tid); commd_debug(MD_MMV_WORK, "work: done (%d, 0x%llx-%d), set=%d, class=%d, type=%d\n", MSGID_ELEMS(msg->msg_msgid), setno, class, msg->msg_type); *retval = MDMNE_ACK; /* this means success */ return (retval); } /* ARGSUSED */ int * mdmn_wakeup_initiator_svc_2(md_mn_result_t *res, struct svc_req *rqstp) { int *retval; int err; set_t setno; mutex_t *mx; /* protection of initiator_table */ SVCXPRT *transp = NULL; md_mn_msgid_t initiator_table_id; md_mn_msgclass_t class; retval = Malloc(sizeof (int)); /* check if the global initialization is done */ if ((md_commd_global_state & MD_CGS_INITED) == 0) { global_init(); } setno = res->mmr_setno; if (md_mn_set_inited[setno] != MDMN_SET_READY) { /* set not ready means we just crashed are restarted now */ /* Can only use the appropriate mutexes if they are inited */ if (md_mn_set_inited[setno] & MDMN_SET_MUTEXES) { rw_wrlock(&set_desc_rwlock[setno]); rw_wrlock(&client_rwlock[setno]); err = mdmn_init_set(setno, MDMN_SET_READY); rw_unlock(&client_rwlock[setno]); rw_unlock(&set_desc_rwlock[setno]); } else { err = mdmn_init_set(setno, MDMN_SET_READY); } if (err) { *retval = MDMNE_CANNOT_CONNECT; xdr_free(xdr_md_mn_result_t, (caddr_t)res); return (retval); } } /* is this rpc request coming from a licensed node? */ if (check_license(rqstp, res->mmr_sender) == FALSE) { xdr_free(xdr_md_mn_result_t, (caddr_t)res); *retval = MDMNE_RPC_FAIL; return (retval); } class = mdmn_get_message_class(res->mmr_msgtype); mx = mdmn_get_initiator_table_mx(setno, class); commd_debug(MD_MMV_WAKE_I, "wake_ini: received (%d, 0x%llx-%d) set=%d, class=%d, type=%d\n", MSGID_ELEMS(res->mmr_msgid), setno, class, res->mmr_msgtype); mutex_lock(mx); /* * Search the initiator wakeup table. * If we find an entry here (which should always be true) * we are on the initiating node and we wakeup the original * local rpc call. */ mdmn_get_initiator_table_id(setno, class, &initiator_table_id); if (MSGID_CMP(&(initiator_table_id), &(res->mmr_msgid))) { transp = mdmn_get_initiator_table_transp(setno, class); mdmn_svc_sendreply(transp, xdr_md_mn_result_t, (char *)res); svc_done(transp); mdmn_unregister_initiator_table(setno, class); *retval = MDMNE_ACK; commd_debug(MD_MMV_WAKE_I, "wake_ini: replied (%d, 0x%llx-%d)\n", MSGID_ELEMS(res->mmr_msgid)); } else { commd_debug(MD_MMV_WAKE_I, "wakeup initiator: unsolicited message (%d, 0x%llx-%d)\n", MSGID_ELEMS(res->mmr_msgid)); *retval = MDMNE_NO_WAKEUP_ENTRY; } mutex_unlock(mx); /* less work for check_timeouts */ mutex_lock(&check_timeout_mutex); if (messages_on_their_way == 0) { commd_debug(MD_MMV_WAKE_I, "Oops, messages_on_their_way < 0 (%d, 0x%llx-%d)\n", MSGID_ELEMS(res->mmr_msgid)); } else { messages_on_their_way--; } mutex_unlock(&check_timeout_mutex); xdr_free(xdr_md_mn_result_t, (caddr_t)res); return (retval); } /* * res must be free'd by the thread we wake up */ /* ARGSUSED */ int * mdmn_wakeup_master_svc_2(md_mn_result_t *ores, struct svc_req *rqstp) { int *retval; int err; set_t setno; cond_t *cv; mutex_t *mx; md_mn_msgid_t master_table_id; md_mn_nodeid_t sender; md_mn_result_t *res; md_mn_msgclass_t class; retval = Malloc(sizeof (int)); /* check if the global initialization is done */ if ((md_commd_global_state & MD_CGS_INITED) == 0) { global_init(); } /* Need to copy the results here, as they are static for RPC */ res = copy_result(ores); xdr_free(xdr_md_mn_result_t, (caddr_t)ores); class = mdmn_get_message_class(res->mmr_msgtype); setno = res->mmr_setno; if (md_mn_set_inited[setno] != MDMN_SET_READY) { /* set not ready means we just crashed are restarted now */ /* Can only use the appropriate mutexes if they are inited */ if (md_mn_set_inited[setno] & MDMN_SET_MUTEXES) { rw_wrlock(&set_desc_rwlock[setno]); rw_wrlock(&client_rwlock[setno]); err = mdmn_init_set(setno, MDMN_SET_READY); rw_unlock(&client_rwlock[setno]); rw_unlock(&set_desc_rwlock[setno]); } else { err = mdmn_init_set(setno, MDMN_SET_READY); } if (err) { *retval = MDMNE_CANNOT_CONNECT; xdr_free(xdr_md_mn_result_t, (caddr_t)res); return (retval); } } /* is this rpc request coming from a licensed node? */ if (check_license(rqstp, res->mmr_sender) == FALSE) { *retval = MDMNE_RPC_FAIL; xdr_free(xdr_md_mn_result_t, (caddr_t)res); return (retval); } commd_debug(MD_MMV_WAKE_M, "wake_mas: received (%d, 0x%llx-%d) set=%d, class=%d, type=%d " "from %d\n", MSGID_ELEMS(res->mmr_msgid), setno, class, res->mmr_msgtype, res->mmr_sender); /* * The mutex and cv are needed for waking up the thread * sleeping in mdmn_master_process_msg() */ mx = mdmn_get_master_table_mx(setno, class); cv = mdmn_get_master_table_cv(setno, class); /* * lookup the master wakeup table * If we find our message, we are on the master and * called by a slave that finished processing a message. * We store the results in the appropriate slot and * wakeup the thread (mdmn_master_process_msg()) waiting for them. */ mutex_lock(mx); mdmn_get_master_table_id(setno, class, &master_table_id); sender = mdmn_get_master_table_addr(setno, class); if (MSGID_CMP(&(master_table_id), &(res->mmr_msgid))) { if (sender == res->mmr_sender) { mdmn_set_master_table_res(setno, class, res); cond_signal(cv); *retval = MDMNE_ACK; } else { /* id is correct but wrong sender (I smell a timeout) */ commd_debug(MD_MMV_WAKE_M, "wakeup master got unsolicited message: " "(%d, 0x%llx-%d) from %d\n", MSGID_ELEMS(res->mmr_msgid), res->mmr_sender); free_result(res); *retval = MDMNE_TIMEOUT; } } else { /* id is wrong, smells like a very late timeout */ commd_debug(MD_MMV_WAKE_M, "wakeup master got unsolicited message: " "(%d, 0x%llx-%d) from %d, expected (%d, 0x%llx-%d)\n", MSGID_ELEMS(res->mmr_msgid), res->mmr_sender, MSGID_ELEMS(master_table_id)); free_result(res); *retval = MDMNE_NO_WAKEUP_ENTRY; } mutex_unlock(mx); return (retval); } /* * Lock a set/class combination. * This is mainly done for debug purpose. * This set/class combination immediately is blocked, * even in the middle of sending messages to multiple slaves. * This remains until the user issues a mdmn_comm_unlock_svc_2 for the same * set/class combination. * * Special messages of class MD_MSG_CLASS0 can never be locked. * e.g. MD_MN_MSG_VERBOSITY, MD_MN_MSG_ABORT * * That means, if MD_MSG_CLASS0 is specified, we lock all classes from * >= MD_MSG_CLASS1 to < MD_MN_NCLASSES * * set must be between 1 and MD_MAXSETS * class can be: * MD_MSG_CLASS0 which means all other classes in this case * or one specific class (< MD_MN_NCLASSES) * * Returns: * MDMNE_ACK on sucess (locking a locked class is Ok) * MDMNE_EINVAL if a parameter is out of range */ /* ARGSUSED */ int * mdmn_comm_lock_svc_2(md_mn_set_and_class_t *msc, struct svc_req *rqstp) { int *retval; set_t setno = msc->msc_set; md_mn_msgclass_t class = msc->msc_class; retval = Malloc(sizeof (int)); /* check if the global initialization is done */ if ((md_commd_global_state & MD_CGS_INITED) == 0) { global_init(); } /* is this rpc request coming from the local node ? */ if (check_license(rqstp, 0) == FALSE) { xdr_free(xdr_md_mn_set_and_class_t, (caddr_t)msc); *retval = MDMNE_RPC_FAIL; return (retval); } /* Perform some range checking */ if ((setno == 0) || (setno >= MD_MAXSETS) || (class < MD_MSG_CLASS0) || (class >= MD_MN_NCLASSES)) { *retval = MDMNE_EINVAL; return (retval); } commd_debug(MD_MMV_MISC, "lock: set=%d, class=%d\n", setno, class); mutex_lock(&mdmn_busy_mutex[setno]); if (class != MD_MSG_CLASS0) { mdmn_mark_class_locked(setno, class); } else { /* MD_MSG_CLASS0 is used as a wild card for all classes */ for (class = MD_MSG_CLASS1; class < MD_MN_NCLASSES; class++) { mdmn_mark_class_locked(setno, class); } } mutex_unlock(&mdmn_busy_mutex[setno]); *retval = MDMNE_ACK; return (retval); } /* * Unlock a set/class combination. * set must be between 1 and MD_MAXSETS * class can be: * MD_MSG_CLASS0 which means all other classes in this case (like above) * or one specific class (< MD_MN_NCLASSES) * * Returns: * MDMNE_ACK on sucess (unlocking an unlocked class is Ok) * MDMNE_EINVAL if a parameter is out of range */ /* ARGSUSED */ int * mdmn_comm_unlock_svc_2(md_mn_set_and_class_t *msc, struct svc_req *rqstp) { int *retval; set_t setno = msc->msc_set; md_mn_msgclass_t class = msc->msc_class; retval = Malloc(sizeof (int)); /* check if the global initialization is done */ if ((md_commd_global_state & MD_CGS_INITED) == 0) { global_init(); } /* is this rpc request coming from the local node ? */ if (check_license(rqstp, 0) == FALSE) { xdr_free(xdr_md_mn_set_and_class_t, (caddr_t)msc); *retval = MDMNE_RPC_FAIL; return (retval); } /* Perform some range checking */ if ((setno == 0) || (setno >= MD_MAXSETS) || (class < MD_MSG_CLASS0) || (class >= MD_MN_NCLASSES)) { *retval = MDMNE_EINVAL; return (retval); } commd_debug(MD_MMV_MISC, "unlock: set=%d, class=%d\n", setno, class); mutex_lock(&mdmn_busy_mutex[setno]); if (class != MD_MSG_CLASS0) { mdmn_mark_class_unlocked(setno, class); } else { /* MD_MSG_CLASS0 is used as a wild card for all classes */ for (class = MD_MSG_CLASS1; class < MD_MN_NCLASSES; class++) { mdmn_mark_class_unlocked(setno, class); } } mutex_unlock(&mdmn_busy_mutex[setno]); *retval = MDMNE_ACK; return (retval); } /* * mdmn_comm_suspend_svc_2(setno, class) * * Drain all outstanding messages for a given set/class combination * and don't allow new messages to be processed. * * Special messages of class MD_MSG_CLASS0 can never be locked. * e.g. MD_MN_MSG_VERBOSITY * * 1 <= setno < MD_MAXSETS or setno == MD_COMM_ALL_SETS * 1 <= class < MD_MN_NCLASSES or class == MD_COMM_ALL_CLASSES * * If class _is_not_ MD_COMM_ALL_CLASSES, then we simply mark this * one class as being suspended. * If messages for this class are currently on their way, * MDMNE_SET_NOT_DRAINED is returned. Otherwise MDMNE_ACK is returned. * * If class _is_ MD_COMM_ALL_CLASSES we drain all classes of this set. * Messages must be generated in ascending order. * This means, a message cannot create submessages with the same or lower class. * Draining messages must go from 1 to NCLASSES in order to ensure we don't * generate a hanging situation here. * We mark class 1 as being suspended. * if the class is not busy, we proceed with class 2 * and so on * if a class *is* busy, we cannot continue here, but return * MDMNE_SET_NOT_DRAINED. * We expect the caller to hold on for some seconds and try again. * When that message, that held the class busy is done in * mdmn_master_process_msg(), mdmn_mark_class_unbusy() called. * There it is checked if the class is about to drain. * In that case it tries to drain all higher classes there. * * If setno is MD_COMM_ALL_SETS then we perform this on all possible sets. * In that case we return MDMNE_SET_NOT_DRAINED if not all sets are * completely drained. * * Returns: * MDMNE_ACK on sucess (set is drained, no outstanding messages) * MDMNE_SET_NOT_DRAINED if drain process is started, but there are * still outstanding messages for this set(s) * MDMNE_EINVAL if setno is out of range * MDMNE_NOT_JOINED if the set is not yet initialized on this node */ /* ARGSUSED */ int * mdmn_comm_suspend_svc_2(md_mn_set_and_class_t *msc, struct svc_req *rqstp) { int *retval; int failure = 0; set_t startset, endset; set_t setno = msc->msc_set; md_mn_msgclass_t oclass = msc->msc_class; #ifdef NOT_YET_NEEDED uint_t flags = msc->msc_flags; #endif /* NOT_YET_NEEDED */ md_mn_msgclass_t class; retval = Malloc(sizeof (int)); /* check if the global initialization is done */ if ((md_commd_global_state & MD_CGS_INITED) == 0) { global_init(); } /* is this rpc request coming from the local node ? */ if (check_license(rqstp, 0) == FALSE) { xdr_free(xdr_md_mn_set_and_class_t, (caddr_t)msc); *retval = MDMNE_RPC_FAIL; return (retval); } commd_debug(MD_MMV_MISC, "suspend: called for set=%d class=%d\n", setno, oclass); /* Perform some range checking */ if (setno >= MD_MAXSETS) { *retval = MDMNE_EINVAL; commd_debug(MD_MMV_MISC, "suspend: returning MDMNE_EINVAL\n"); return (retval); } /* setno == MD_COMM_ALL_SETS means: we walk thru all possible sets. */ if (setno == MD_COMM_ALL_SETS) { startset = 1; endset = MD_MAXSETS - 1; } else { startset = setno; endset = setno; } for (setno = startset; setno <= endset; setno++) { /* Here we need the mutexes for the set to be setup */ if (md_mn_set_inited[setno] != MDMN_SET_MUTEXES) { (void) mdmn_init_set(setno, MDMN_SET_MUTEXES); } mutex_lock(&mdmn_busy_mutex[setno]); /* shall we drain all classes of this set? */ if (oclass == MD_COMM_ALL_CLASSES) { for (class = 1; class < MD_MN_NCLASSES; class ++) { commd_debug(MD_MMV_MISC, "suspend: suspending set %d, class %d\n", setno, class); *retval = mdmn_mark_class_suspended(setno, class, MDMN_SUSPEND_ALL); if (*retval == MDMNE_SET_NOT_DRAINED) { failure++; } } } else { /* only drain one specific class */ commd_debug(MD_MMV_MISC, "suspend: suspending set=%d class=%d\n", setno, oclass); *retval = mdmn_mark_class_suspended(setno, oclass, MDMN_SUSPEND_1); if (*retval == MDMNE_SET_NOT_DRAINED) { failure++; } } mutex_unlock(&mdmn_busy_mutex[setno]); } /* If one or more sets are not entirely drained, failure is non-zero */ if (failure != 0) { *retval = MDMNE_SET_NOT_DRAINED; commd_debug(MD_MMV_MISC, "suspend: returning MDMNE_SET_NOT_DRAINED\n"); } else { *retval = MDMNE_ACK; } return (retval); } /* * mdmn_comm_resume_svc_2(setno, class) * * Resume processing messages for a given set. * This incorporates the repeal of a previous suspend operation. * * 1 <= setno < MD_MAXSETS or setno == MD_COMM_ALL_SETS * 1 <= class < MD_MN_NCLASSES or class == MD_COMM_ALL_CLASSES * * If class _is_not_ MD_COMM_ALL_CLASSES, then we simply mark this * one class as being resumed. * * If class _is_ MD_COMM_ALL_CLASSES we resume all classes of this set. * * If setno is MD_COMM_ALL_SETS then we perform this on all possible sets. * * If both setno is MD_COMM_ALL_SETS and class is MD_COMM_ALL_CLASSES we also * reset any ABORT flag from the global state. * * Returns: * MDMNE_ACK on sucess (resuming an unlocked set is Ok) * MDMNE_EINVAL if setno is out of range * MDMNE_NOT_JOINED if the set is not yet initialized on this node */ /* ARGSUSED */ int * mdmn_comm_resume_svc_2(md_mn_set_and_class_t *msc, struct svc_req *rqstp) { int *retval; set_t startset, endset; set_t setno = msc->msc_set; md_mn_msgclass_t oclass = msc->msc_class; uint_t flags = msc->msc_flags; md_mn_msgclass_t class; retval = Malloc(sizeof (int)); /* check if the global initialization is done */ if ((md_commd_global_state & MD_CGS_INITED) == 0) { global_init(); } /* is this rpc request coming from the local node ? */ if (check_license(rqstp, 0) == FALSE) { xdr_free(xdr_md_mn_set_and_class_t, (caddr_t)msc); *retval = MDMNE_RPC_FAIL; return (retval); } commd_debug(MD_MMV_MISC, "resume: called for set=%d class=%d\n", setno, oclass); /* Perform some range checking */ if (setno > MD_MAXSETS) { *retval = MDMNE_EINVAL; return (retval); } if (setno == MD_COMM_ALL_SETS) { startset = 1; endset = MD_MAXSETS - 1; if (oclass == MD_COMM_ALL_CLASSES) { /* This is the point where we "unabort" the commd */ commd_debug(MD_MMV_MISC, "resume: resetting ABORT\n"); md_commd_global_state &= ~MD_CGS_ABORTED; } } else { startset = setno; endset = setno; } for (setno = startset; setno <= endset; setno++) { /* Here we need the mutexes for the set to be setup */ if ((md_mn_set_inited[setno] & MDMN_SET_MUTEXES) == 0) { (void) mdmn_init_set(setno, MDMN_SET_MUTEXES); } mutex_lock(&mdmn_busy_mutex[setno]); if (oclass == MD_COMM_ALL_CLASSES) { int end_class = 1; /* * When SUSPENDing all classes, we go * from 1 to MD_MN_NCLASSES-1 * The correct reverse action is RESUMing * from MD_MN_NCLASSES-1 to 1 (or 2) */ if (flags & MD_MSCF_DONT_RESUME_CLASS1) { end_class = 2; } /* * Then mark all classes of this set as no longer * suspended. This supersedes any previous suspend(1) * calls and resumes the set entirely. */ for (class = MD_MN_NCLASSES - 1; class >= end_class; class --) { commd_debug(MD_MMV_MISC, "resume: resuming set=%d class=%d\n", setno, class); mdmn_mark_class_resumed(setno, class, (MDMN_SUSPEND_ALL | MDMN_SUSPEND_1)); } } else { /* * In this case only one class is marked as not * suspended. If a suspend(all) is currently active for * this set, this class will still be suspended. * That state will be cleared by a suspend(all) * (see above) */ commd_debug(MD_MMV_MISC, "resume: resuming set=%d class=%d\n", setno, oclass); mdmn_mark_class_resumed(setno, oclass, MDMN_SUSPEND_1); } mutex_unlock(&mdmn_busy_mutex[setno]); } *retval = MDMNE_ACK; return (retval); } /* ARGSUSED */ int * mdmn_comm_reinit_set_svc_2(set_t *setnop, struct svc_req *rqstp) { int *retval; md_mnnode_desc *node; set_t setno = *setnop; retval = Malloc(sizeof (int)); /* check if the global initialization is done */ if ((md_commd_global_state & MD_CGS_INITED) == 0) { global_init(); } /* is this rpc request coming from the local node ? */ if (check_license(rqstp, 0) == FALSE) { xdr_free(xdr_set_t, (caddr_t)setnop); *retval = MDMNE_RPC_FAIL; return (retval); } commd_debug(MD_MMV_MISC, "reinit: set=%d\n", setno); rw_rdlock(&set_desc_rwlock[setno]); /* * We assume, that all messages have been suspended previously. * * As we are modifying lots of clients here we grab the client_rwlock * in writer mode. This ensures, no new messages come in. */ rw_wrlock(&client_rwlock[setno]); /* This set is no longer initialized */ if ((set_descriptor[setno] != NULL) && (md_mn_set_inited[setno] & MDMN_SET_NODES)) { /* destroy all rpc clients from this set */ for (node = set_descriptor[setno]->sd_nodelist; node; node = node->nd_next) { mdmn_clnt_destroy(client[setno][node->nd_nodeid]); if (client[setno][node->nd_nodeid] != (CLIENT *)NULL) { client[setno][node->nd_nodeid] = (CLIENT *)NULL; } } md_mn_set_inited[setno] &= ~MDMN_SET_NODES; } commd_debug(MD_MMV_MISC, "reinit: done init_set(%d)\n", setno); rw_unlock(&client_rwlock[setno]); rw_unlock(&set_desc_rwlock[setno]); *retval = MDMNE_ACK; return (retval); } /* * This is just an interface for testing purpose. * Here we can disable single message types. * If we block a message type, this is valid for all MN sets. * If a message arrives later, and it's message type is blocked, it will * be returned immediately with MDMNE_CLASS_LOCKED, which causes the sender to * resend this message over and over again. */ /* ARGSUSED */ int * mdmn_comm_msglock_svc_2(md_mn_type_and_lock_t *mmtl, struct svc_req *rqstp) { int *retval; md_mn_msgtype_t type = mmtl->mmtl_type; uint_t lock = mmtl->mmtl_lock; retval = Malloc(sizeof (int)); /* check if the global initialization is done */ if ((md_commd_global_state & MD_CGS_INITED) == 0) { global_init(); } /* is this rpc request coming from the local node ? */ if (check_license(rqstp, 0) == FALSE) { xdr_free(xdr_md_mn_type_and_lock_t, (caddr_t)mmtl); *retval = MDMNE_RPC_FAIL; return (retval); } /* Perform some range checking */ if ((type == 0) || (type >= MD_MN_NMESSAGES)) { *retval = MDMNE_EINVAL; return (retval); } commd_debug(MD_MMV_MISC, "msglock: type=%d, lock=%d\n", type, lock); msgtype_lock_state[type] = lock; *retval = MDMNE_ACK; return (retval); }