/* * 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 2009 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. */ #include <stdio.h> #include <unistd.h> #include <stdlib.h> #include <ctype.h> #include <syslog.h> #include <string.h> #include <deflt.h> #include <kstat.h> #include <sys/param.h> #include <sys/types.h> #include <sys/time.h> #include <sys/stat.h> #include <sys/wait.h> #include <sys/socket.h> #include <netinet/in.h> #include <signal.h> #include <sys/signal.h> #include <rpc/rpc.h> #include <rpc/pmap_clnt.h> #include <sys/mount.h> #include <sys/mntent.h> #include <sys/mnttab.h> #include <sys/fstyp.h> #include <sys/fsid.h> #include <arpa/inet.h> #include <netdb.h> #include <netconfig.h> #include <netdir.h> #include <errno.h> #define NFSCLIENT #include <nfs/nfs.h> #include <nfs/mount.h> #include <rpcsvc/mount.h> #include <rpc/nettype.h> #include <locale.h> #include <setjmp.h> #include <sys/socket.h> #include <thread.h> #include <limits.h> #include <nss_dbdefs.h> /* for NSS_BUFLEN_HOSTS */ #include <nfs/nfs_sec.h> #include <sys/sockio.h> #include <net/if.h> #include <assert.h> #include <nfs/nfs_clnt.h> #include <rpcsvc/nfs4_prot.h> #define NO_RDDIR_CACHE #include "automount.h" #include "replica.h" #include "nfs_subr.h" #include "webnfs.h" #include <sys/sockio.h> #include <net/if.h> #include <assert.h> #include <rpcsvc/daemon_utils.h> #include <pwd.h> #include <strings.h> #include <tsol/label.h> #include <zone.h> extern void set_nfsv4_ephemeral_mount_to(void); extern char *nfs_get_qop_name(); extern AUTH *nfs_create_ah(); extern enum snego_stat nfs_sec_nego(); #define MAXHOSTS 512 /* number of transports to try */ #define MNT_PREF_LISTLEN 2 #define FIRST_TRY 1 #define SECOND_TRY 2 #define MNTTYPE_CACHEFS "cachefs" /* * host cache states */ #define NOHOST 0 #define GOODHOST 1 #define DEADHOST 2 #define NFS_ARGS_EXTB_secdata(args, secdata) \ { (args).nfs_args_ext = NFS_ARGS_EXTB, \ (args).nfs_ext_u.nfs_extB.secdata = secdata; } struct cache_entry { struct cache_entry *cache_next; char *cache_host; time_t cache_time; int cache_state; rpcvers_t cache_reqvers; rpcvers_t cache_outvers; char *cache_proto; }; struct mfs_snego_t { int sec_opt; bool_t snego_done; char *nfs_flavor; seconfig_t nfs_sec; }; typedef struct mfs_snego_t mfs_snego_t; static struct cache_entry *cache_head = NULL; rwlock_t cache_lock; /* protect the cache chain */ static enum nfsstat nfsmount(struct mapfs *, char *, char *, int, int, uid_t, action_list *); static int is_nfs_port(char *); void netbuf_free(struct netbuf *); struct knetconfig *get_knconf(struct netconfig *); void free_knconf(struct knetconfig *); static int get_pathconf(CLIENT *, char *, char *, struct pathcnf **, int); static struct mapfs *enum_servers(struct mapent *, char *); static struct mapfs *get_mysubnet_servers(struct mapfs *); static int subnet_test(int af, struct sioc_addrreq *); static struct netbuf *get_addr(char *, rpcprog_t, rpcvers_t, struct netconfig **, char *, ushort_t, struct t_info *); static struct netbuf *get_pubfh(char *, rpcvers_t, mfs_snego_t *, struct netconfig **, char *, ushort_t, struct t_info *, caddr_t *, bool_t, char *); static int create_homedir(const char *, const char *); enum type_of_stuff { SERVER_ADDR = 0, SERVER_PING = 1, SERVER_FH = 2 }; void *get_server_stuff(enum type_of_stuff, char *, rpcprog_t, rpcvers_t, mfs_snego_t *, struct netconfig **, char *, ushort_t, struct t_info *, caddr_t *, bool_t, char *, enum clnt_stat *); void *get_the_stuff(enum type_of_stuff, char *, rpcprog_t, rpcvers_t, mfs_snego_t *, struct netconfig *, ushort_t, struct t_info *, caddr_t *, bool_t, char *, enum clnt_stat *); struct mapfs *add_mfs(struct mapfs *, int, struct mapfs **, struct mapfs **); void free_mfs(struct mapfs *); static void dump_mfs(struct mapfs *, char *, int); static char *dump_distance(struct mapfs *); static void cache_free(struct cache_entry *); static int cache_check(char *, rpcvers_t *, char *); static void cache_enter(char *, rpcvers_t, rpcvers_t, char *, int); void destroy_auth_client_handle(CLIENT *cl); #ifdef CACHE_DEBUG static void trace_host_cache(); static void trace_portmap_cache(); #endif /* CACHE_DEBUG */ static int rpc_timeout = 20; #ifdef CACHE_DEBUG /* * host cache counters. These variables do not need to be protected * by mutex's. They have been added to measure the utility of the * goodhost/deadhost cache in the lazy hierarchical mounting scheme. */ static int host_cache_accesses = 0; static int host_cache_lookups = 0; static int deadhost_cache_hits = 0; static int goodhost_cache_hits = 0; /* * portmap cache counters. These variables do not need to be protected * by mutex's. They have been added to measure the utility of the portmap * cache in the lazy hierarchical mounting scheme. */ static int portmap_cache_accesses = 0; static int portmap_cache_lookups = 0; static int portmap_cache_hits = 0; #endif /* CACHE_DEBUG */ /* * There are the defaults (range) for the client when determining * which NFS version to use when probing the server (see above). * These will only be used when the vers mount option is not used and * these may be reset if /etc/default/nfs is configured to do so. */ static rpcvers_t vers_max_default = NFS_VERSMAX_DEFAULT; static rpcvers_t vers_min_default = NFS_VERSMIN_DEFAULT; /* * list of support services needed */ static char *service_list[] = { STATD, LOCKD, NULL }; static char *service_list_v4[] = { STATD, LOCKD, NFS4CBD, NFSMAPID, NULL }; static void read_default_nfs(void); static int is_v4_mount(char *); static void start_nfs4cbd(void); int mount_nfs( struct mapent *me, char *mntpnt, char *prevhost, int overlay, uid_t uid, action_list **alpp) { struct mapfs *mfs, *mp; int err = -1; int cached; action_list *alp; alp = *alpp; read_default_nfs(); mfs = enum_servers(me, prevhost); if (mfs == NULL) return (ENOENT); /* * Try loopback if we have something on localhost; if nothing * works, we will fall back to NFS */ if (is_nfs_port(me->map_mntopts)) { for (mp = mfs; mp; mp = mp->mfs_next) { if (self_check(mp->mfs_host)) { err = loopbackmount(mp->mfs_dir, mntpnt, me->map_mntopts, overlay); if (err) { mp->mfs_ignore = 1; } else { /* * Free action_list if there * is one as it is not needed. * Make sure to set alpp to null * so caller doesn't try to free it * again. */ if (*alpp) { free(*alpp); *alpp = NULL; } break; } } } } if (err) { cached = strcmp(me->map_mounter, MNTTYPE_CACHEFS) == 0; err = nfsmount(mfs, mntpnt, me->map_mntopts, cached, overlay, uid, alp); if (err && trace > 1) { trace_prt(1, " Couldn't mount %s:%s, err=%d\n", mfs->mfs_host, mfs->mfs_dir, err); } } free_mfs(mfs); return (err); } /* * Using the new ioctl SIOCTONLINK to determine if a host is on the same * subnet. Remove the old network, subnet check. */ static struct mapfs * get_mysubnet_servers(struct mapfs *mfs_in) { int s; struct mapfs *mfs, *p, *mfs_head = NULL, *mfs_tail = NULL; struct netconfig *nconf; NCONF_HANDLE *nc = NULL; struct nd_hostserv hs; struct nd_addrlist *retaddrs; struct netbuf *nb; struct sioc_addrreq areq; int res; int af; int i; int sa_size; hs.h_serv = "rpcbind"; for (mfs = mfs_in; mfs; mfs = mfs->mfs_next) { nc = setnetconfig(); while (nconf = getnetconfig(nc)) { /* * Care about INET family only. proto_done flag * indicates if we have already covered this * protocol family. If so skip it */ if (((strcmp(nconf->nc_protofmly, NC_INET6) == 0) || (strcmp(nconf->nc_protofmly, NC_INET) == 0)) && (nconf->nc_semantics == NC_TPI_CLTS)) { } else continue; hs.h_host = mfs->mfs_host; if (netdir_getbyname(nconf, &hs, &retaddrs) != ND_OK) continue; /* * For each host address see if it's on our * local subnet. */ if (strcmp(nconf->nc_protofmly, NC_INET6) == 0) af = AF_INET6; else af = AF_INET; nb = retaddrs->n_addrs; for (i = 0; i < retaddrs->n_cnt; i++, nb++) { memset(&areq.sa_addr, 0, sizeof (areq.sa_addr)); memcpy(&areq.sa_addr, nb->buf, MIN(nb->len, sizeof (areq.sa_addr))); if (res = subnet_test(af, &areq)) { p = add_mfs(mfs, DIST_MYNET, &mfs_head, &mfs_tail); if (!p) { netdir_free(retaddrs, ND_ADDRLIST); endnetconfig(nc); return (NULL); } break; } } /* end of every host */ if (trace > 2) { trace_prt(1, "get_mysubnet_servers: host=%s " "netid=%s res=%s\n", mfs->mfs_host, nconf->nc_netid, res == 1?"SUC":"FAIL"); } netdir_free(retaddrs, ND_ADDRLIST); } /* end of while */ endnetconfig(nc); } /* end of every map */ return (mfs_head); } int subnet_test(int af, struct sioc_addrreq *areq) { int s; if ((s = socket(af, SOCK_DGRAM, 0)) < 0) { return (0); } areq->sa_res = -1; if (ioctl(s, SIOCTONLINK, (caddr_t)areq) < 0) { syslog(LOG_ERR, "subnet_test:SIOCTONLINK failed"); return (0); } close(s); if (areq->sa_res == 1) return (1); else return (0); } /* * ping a bunch of hosts at once and sort by who responds first */ static struct mapfs * sort_servers(struct mapfs *mfs_in, int timeout) { struct mapfs *m1 = NULL; enum clnt_stat clnt_stat; if (!mfs_in) return (NULL); clnt_stat = nfs_cast(mfs_in, &m1, timeout); if (!m1) { char buff[2048] = {'\0'}; for (m1 = mfs_in; m1; m1 = m1->mfs_next) { (void) strcat(buff, m1->mfs_host); if (m1->mfs_next) (void) strcat(buff, ","); } syslog(LOG_ERR, "servers %s not responding: %s", buff, clnt_sperrno(clnt_stat)); } return (m1); } /* * Add a mapfs entry to the list described by *mfs_head and *mfs_tail, * provided it is not marked "ignored" and isn't a dupe of ones we've * already seen. */ struct mapfs * add_mfs(struct mapfs *mfs, int distance, struct mapfs **mfs_head, struct mapfs **mfs_tail) { struct mapfs *tmp, *new; for (tmp = *mfs_head; tmp; tmp = tmp->mfs_next) if ((strcmp(tmp->mfs_host, mfs->mfs_host) == 0 && strcmp(tmp->mfs_dir, mfs->mfs_dir) == 0) || mfs->mfs_ignore) return (*mfs_head); new = (struct mapfs *)malloc(sizeof (struct mapfs)); if (!new) { syslog(LOG_ERR, "Memory allocation failed: %m"); return (NULL); } bcopy(mfs, new, sizeof (struct mapfs)); new->mfs_next = NULL; if (distance) new->mfs_distance = distance; if (!*mfs_head) *mfs_tail = *mfs_head = new; else { (*mfs_tail)->mfs_next = new; *mfs_tail = new; } return (*mfs_head); } static void dump_mfs(struct mapfs *mfs, char *message, int level) { struct mapfs *m1; if (trace <= level) return; trace_prt(1, "%s", message); if (!mfs) { trace_prt(0, "mfs is null\n"); return; } for (m1 = mfs; m1; m1 = m1->mfs_next) trace_prt(0, "%s[%s] ", m1->mfs_host, dump_distance(m1)); trace_prt(0, "\n"); } static char * dump_distance(struct mapfs *mfs) { switch (mfs->mfs_distance) { case 0: return ("zero"); case DIST_SELF: return ("self"); case DIST_MYSUB: return ("mysub"); case DIST_MYNET: return ("mynet"); case DIST_OTHER: return ("other"); default: return ("other"); } } /* * Walk linked list "raw", building a new list consisting of members * NOT found in list "filter", returning the result. */ static struct mapfs * filter_mfs(struct mapfs *raw, struct mapfs *filter) { struct mapfs *mfs, *p, *mfs_head = NULL, *mfs_tail = NULL; int skip; if (!raw) return (NULL); for (mfs = raw; mfs; mfs = mfs->mfs_next) { for (skip = 0, p = filter; p; p = p->mfs_next) { if (strcmp(p->mfs_host, mfs->mfs_host) == 0 && strcmp(p->mfs_dir, mfs->mfs_dir) == 0) { skip = 1; break; } } if (skip) continue; p = add_mfs(mfs, 0, &mfs_head, &mfs_tail); if (!p) return (NULL); } return (mfs_head); } /* * Walk a linked list of mapfs structs, freeing each member. */ void free_mfs(struct mapfs *mfs) { struct mapfs *tmp; while (mfs) { tmp = mfs->mfs_next; free(mfs); mfs = tmp; } } /* * New code for NFS client failover: we need to carry and sort * lists of server possibilities rather than return a single * entry. It preserves previous behaviour of sorting first by * locality (loopback-or-preferred/subnet/net/other) and then * by ping times. We'll short-circuit this process when we * have ENOUGH or more entries. */ static struct mapfs * enum_servers(struct mapent *me, char *preferred) { struct mapfs *p, *m1, *m2, *mfs_head = NULL, *mfs_tail = NULL; /* * Short-circuit for simple cases. */ if (!me->map_fs->mfs_next) { p = add_mfs(me->map_fs, DIST_OTHER, &mfs_head, &mfs_tail); if (!p) return (NULL); return (mfs_head); } dump_mfs(me->map_fs, " enum_servers: mapent: ", 2); /* * get addresses & see if any are myself * or were mounted from previously in a * hierarchical mount. */ if (trace > 2) trace_prt(1, " enum_servers: looking for pref/self\n"); for (m1 = me->map_fs; m1; m1 = m1->mfs_next) { if (m1->mfs_ignore) continue; if (self_check(m1->mfs_host) || strcmp(m1->mfs_host, preferred) == 0) { p = add_mfs(m1, DIST_SELF, &mfs_head, &mfs_tail); if (!p) return (NULL); } } if (trace > 2 && m1) trace_prt(1, " enum_servers: pref/self found, %s\n", m1->mfs_host); /* * look for entries on this subnet */ dump_mfs(m1, " enum_servers: input of get_mysubnet_servers: ", 2); m1 = get_mysubnet_servers(me->map_fs); dump_mfs(m1, " enum_servers: output of get_mysubnet_servers: ", 3); if (m1 && m1->mfs_next) { m2 = sort_servers(m1, rpc_timeout / 2); dump_mfs(m2, " enum_servers: output of sort_servers: ", 3); free_mfs(m1); m1 = m2; } for (m2 = m1; m2; m2 = m2->mfs_next) { p = add_mfs(m2, 0, &mfs_head, &mfs_tail); if (!p) return (NULL); } if (m1) free_mfs(m1); /* * add the rest of the entries at the end */ m1 = filter_mfs(me->map_fs, mfs_head); dump_mfs(m1, " enum_servers: etc: output of filter_mfs: ", 3); m2 = sort_servers(m1, rpc_timeout / 2); dump_mfs(m2, " enum_servers: etc: output of sort_servers: ", 3); if (m1) free_mfs(m1); m1 = m2; for (m2 = m1; m2; m2 = m2->mfs_next) { p = add_mfs(m2, DIST_OTHER, &mfs_head, &mfs_tail); if (!p) return (NULL); } if (m1) free_mfs(m1); done: dump_mfs(mfs_head, " enum_servers: output: ", 1); return (mfs_head); } static enum nfsstat nfsmount( struct mapfs *mfs_in, char *mntpnt, char *opts, int cached, int overlay, uid_t uid, action_list *alp) { CLIENT *cl; char remname[MAXPATHLEN], *mnttabtext = NULL; char mopts[MAX_MNTOPT_STR]; char netname[MAXNETNAMELEN+1]; char *mntopts = NULL; int mnttabcnt = 0; int loglevel; struct mnttab m; struct nfs_args *argp = NULL, *head = NULL, *tail = NULL, *prevhead, *prevtail; int flags; struct fhstatus fhs; struct timeval timeout; enum clnt_stat rpc_stat; enum nfsstat status; struct stat stbuf; struct netconfig *nconf; rpcvers_t vers, versmin; /* used to negotiate nfs version in pingnfs */ /* and mount version with mountd */ rpcvers_t outvers; /* final version to be used during mount() */ rpcvers_t nfsvers; /* version in map options, 0 if not there */ rpcvers_t mountversmax; /* tracks the max mountvers during retries */ /* used to negotiate nfs version using webnfs */ rpcvers_t pubvers, pubversmin, pubversmax; int posix; struct nd_addrlist *retaddrs; struct mountres3 res3; nfs_fh3 fh3; char *fstype; int count, i; char scerror_msg[MAXMSGLEN]; int *auths; int delay; int retries; char *nfs_proto = NULL; uint_t nfs_port = 0; char *p, *host, *rhost, *dir; struct mapfs *mfs = NULL; int error, last_error = 0; int replicated; int entries = 0; int v2cnt = 0, v3cnt = 0, v4cnt = 0; int v2near = 0, v3near = 0, v4near = 0; int skipentry = 0; char *nfs_flavor; seconfig_t nfs_sec; int sec_opt, scerror; struct sec_data *secdata; int secflags; struct netbuf *syncaddr; bool_t use_pubfh; ushort_t thisport; int got_val; mfs_snego_t mfssnego_init, mfssnego; dump_mfs(mfs_in, " nfsmount: input: ", 2); replicated = (mfs_in->mfs_next != NULL); m.mnt_mntopts = opts; if (replicated && hasmntopt(&m, MNTOPT_SOFT)) { if (verbose) syslog(LOG_WARNING, "mount on %s is soft and will not be replicated.", mntpnt); replicated = 0; } if (replicated && !hasmntopt(&m, MNTOPT_RO)) { if (verbose) syslog(LOG_WARNING, "mount on %s is not read-only and will not be replicated.", mntpnt); replicated = 0; } if (replicated && cached) { if (verbose) syslog(LOG_WARNING, "mount on %s is cached and will not be replicated.", mntpnt); replicated = 0; } if (replicated) loglevel = LOG_WARNING; else loglevel = LOG_ERR; if (trace > 1) { if (replicated) trace_prt(1, " nfsmount: replicated mount on %s %s:\n", mntpnt, opts); else trace_prt(1, " nfsmount: standard mount on %s %s:\n", mntpnt, opts); for (mfs = mfs_in; mfs; mfs = mfs->mfs_next) trace_prt(1, " %s:%s\n", mfs->mfs_host, mfs->mfs_dir); } /* * Make sure mountpoint is safe to mount on */ if (lstat(mntpnt, &stbuf) < 0) { syslog(LOG_ERR, "Couldn't stat %s: %m", mntpnt); return (NFSERR_NOENT); } /* * Get protocol specified in options list, if any. */ if ((str_opt(&m, "proto", &nfs_proto)) == -1) { return (NFSERR_NOENT); } /* * Get port specified in options list, if any. */ got_val = nopt(&m, MNTOPT_PORT, (int *)&nfs_port); if (!got_val) nfs_port = 0; /* "unspecified" */ if (nfs_port > USHRT_MAX) { syslog(LOG_ERR, "%s: invalid port number %d", mntpnt, nfs_port); return (NFSERR_NOENT); } /* * Set mount(2) flags here, outside of the loop. */ flags = MS_OPTIONSTR; flags |= (hasmntopt(&m, MNTOPT_RO) == NULL) ? 0 : MS_RDONLY; flags |= (hasmntopt(&m, MNTOPT_NOSUID) == NULL) ? 0 : MS_NOSUID; flags |= overlay ? MS_OVERLAY : 0; if (mntpnt[strlen(mntpnt) - 1] != ' ') /* direct mount point without offsets */ flags |= MS_OVERLAY; use_pubfh = (hasmntopt(&m, MNTOPT_PUBLIC) == NULL) ? FALSE : TRUE; (void) memset(&mfssnego_init, 0, sizeof (mfs_snego_t)); if (hasmntopt(&m, MNTOPT_SECURE) != NULL) { if (++mfssnego_init.sec_opt > 1) { syslog(loglevel, "conflicting security options"); return (NFSERR_IO); } if (nfs_getseconfig_byname("dh", &mfssnego_init.nfs_sec)) { syslog(loglevel, "error getting dh information from %s", NFSSEC_CONF); return (NFSERR_IO); } } if (hasmntopt(&m, MNTOPT_SEC) != NULL) { if ((str_opt(&m, MNTOPT_SEC, &mfssnego_init.nfs_flavor)) == -1) { syslog(LOG_ERR, "nfsmount: no memory"); return (NFSERR_IO); } } if (mfssnego_init.nfs_flavor) { if (++mfssnego_init.sec_opt > 1) { syslog(loglevel, "conflicting security options"); free(mfssnego_init.nfs_flavor); return (NFSERR_IO); } if (nfs_getseconfig_byname(mfssnego_init.nfs_flavor, &mfssnego_init.nfs_sec)) { syslog(loglevel, "error getting %s information from %s", mfssnego_init.nfs_flavor, NFSSEC_CONF); free(mfssnego_init.nfs_flavor); return (NFSERR_IO); } free(mfssnego_init.nfs_flavor); } nextentry: skipentry = 0; got_val = nopt(&m, MNTOPT_VERS, (int *)&nfsvers); if (!got_val) nfsvers = 0; /* "unspecified" */ if (set_versrange(nfsvers, &vers, &versmin) != 0) { syslog(LOG_ERR, "Incorrect NFS version specified for %s", mntpnt); last_error = NFSERR_NOENT; goto ret; } if (nfsvers != 0) { pubversmax = pubversmin = nfsvers; } else { pubversmax = vers; pubversmin = versmin; } /* * Walk the whole list, pinging and collecting version * info so that we can make sure the mount will be * homogeneous with respect to version. * * If we have a version preference, this is easy; we'll * just reject anything that doesn't match. * * If not, we want to try to provide the best compromise * that considers proximity, preference for a higher version, * sorted order, and number of replicas. We will count * the number of V2 and V3 replicas and also the number * which are "near", i.e. the localhost or on the same * subnet. */ for (mfs = mfs_in; mfs; mfs = mfs->mfs_next) { if (mfs->mfs_ignore) continue; /* * If the host is '[a:d:d:r:e:s:s'], * only use 'a:d:d:r:e:s:s' for communication */ host = strdup(mfs->mfs_host); if (host == NULL) { syslog(LOG_ERR, "nfsmount: no memory"); last_error = NFSERR_IO; goto out; } unbracket(&host); (void) memcpy(&mfssnego, &mfssnego_init, sizeof (mfs_snego_t)); if (use_pubfh == TRUE || mfs->mfs_flags & MFS_URL) { char *path; if (nfs_port != 0 && mfs->mfs_port != 0 && nfs_port != mfs->mfs_port) { syslog(LOG_ERR, "nfsmount: port (%u) in nfs URL" " not the same as port (%d) in port " "option\n", mfs->mfs_port, nfs_port); last_error = NFSERR_IO; goto out; } else if (nfs_port != 0) thisport = nfs_port; else thisport = mfs->mfs_port; dir = mfs->mfs_dir; if ((mfs->mfs_flags & MFS_URL) == 0) { path = malloc(strlen(dir) + 2); if (path == NULL) { syslog(LOG_ERR, "nfsmount: no memory"); last_error = NFSERR_IO; goto out; } path[0] = (char)WNL_NATIVEPATH; (void) strcpy(&path[1], dir); } else { path = dir; } argp = (struct nfs_args *) malloc(sizeof (struct nfs_args)); if (!argp) { if (path != dir) free(path); syslog(LOG_ERR, "nfsmount: no memory"); last_error = NFSERR_IO; goto out; } (void) memset(argp, 0, sizeof (*argp)); /* * RDMA support * By now Mount argument struct has been allocated, * either a pub_fh path will be taken or the regular * one. So here if a protocol was specified and it * was not rdma we let it be, else we set DO_RDMA. * If no proto was there we advise on trying RDMA. */ if (nfs_proto) { if (strcmp(nfs_proto, "rdma") == 0) { free(nfs_proto); nfs_proto = NULL; argp->flags |= NFSMNT_DORDMA; } } else argp->flags |= NFSMNT_TRYRDMA; for (pubvers = pubversmax; pubvers >= pubversmin; pubvers--) { nconf = NULL; argp->addr = get_pubfh(host, pubvers, &mfssnego, &nconf, nfs_proto, thisport, NULL, &argp->fh, TRUE, path); if (argp->addr != NULL) break; if (nconf != NULL) freenetconfigent(nconf); } if (path != dir) free(path); if (argp->addr != NULL) { /* * The use of llock option for NFSv4 * mounts is not required since file * locking is included within the protocol */ if (pubvers != NFS_V4) argp->flags |= NFSMNT_LLOCK; argp->flags |= NFSMNT_PUBLIC; vers = pubvers; mfs->mfs_args = argp; mfs->mfs_version = pubvers; mfs->mfs_nconf = nconf; mfs->mfs_flags |= MFS_FH_VIA_WEBNFS; } else { free(argp); /* * If -public was specified, give up * on this entry now. */ if (use_pubfh == TRUE) { syslog(loglevel, "%s: no public file handle support", host); last_error = NFSERR_NOENT; mfs->mfs_ignore = 1; continue; } /* * Back off to a conventional mount. * * URL's can contain escape characters. Get * rid of them. */ path = malloc(strlen(dir) + 2); if (path == NULL) { syslog(LOG_ERR, "nfsmount: no memory"); last_error = NFSERR_IO; goto out; } strcpy(path, dir); URLparse(path); mfs->mfs_dir = path; mfs->mfs_flags |= MFS_ALLOC_DIR; mfs->mfs_flags &= ~MFS_URL; } } if ((mfs->mfs_flags & MFS_FH_VIA_WEBNFS) == 0) { i = pingnfs(host, get_retry(opts) + 1, &vers, versmin, 0, FALSE, NULL, nfs_proto); if (i != RPC_SUCCESS) { if (i == RPC_PROGVERSMISMATCH) { syslog(loglevel, "server %s: NFS " "protocol version mismatch", host); } else { syslog(loglevel, "server %s not " "responding", host); } mfs->mfs_ignore = 1; last_error = NFSERR_NOENT; continue; } if (nfsvers != 0 && nfsvers != vers) { if (nfs_proto == NULL) syslog(loglevel, "NFS version %d " "not supported by %s", nfsvers, host); else syslog(loglevel, "NFS version %d " "with proto %s " "not supported by %s", nfsvers, nfs_proto, host); mfs->mfs_ignore = 1; last_error = NFSERR_NOENT; continue; } } free(host); switch (vers) { case NFS_V4: v4cnt++; break; case NFS_V3: v3cnt++; break; case NFS_VERSION: v2cnt++; break; default: break; } /* * It's not clear how useful this stuff is if * we are using webnfs across the internet, but it * can't hurt. */ if (mfs->mfs_distance && mfs->mfs_distance <= DIST_MYSUB) { switch (vers) { case NFS_V4: v4near++; break; case NFS_V3: v3near++; break; case NFS_VERSION: v2near++; break; default: break; } } /* * If the mount is not replicated, we don't want to * ping every entry, so we'll stop here. This means * that we may have to go back to "nextentry" above * to consider another entry if we can't get * all the way to mount(2) with this one. */ if (!replicated) break; } if (nfsvers == 0) { /* * Choose the NFS version. * We prefer higher versions, but will choose a one- * version downgrade in service if we can use a local * network interface and avoid a router. */ if (v4cnt && v4cnt >= v3cnt && (v4near || !v3near)) nfsvers = NFS_V4; else if (v3cnt && v3cnt >= v2cnt && (v3near || !v2near)) nfsvers = NFS_V3; else nfsvers = NFS_VERSION; if (trace > 2) trace_prt(1, " nfsmount: v4=%d[%d]v3=%d[%d],v2=%d[%d] => v%d.\n", v4cnt, v4near, v3cnt, v3near, v2cnt, v2near, nfsvers); } /* * Since we don't support different NFS versions in replicated * mounts, set fstype now. * Also take the opportunity to set * the mount protocol version as appropriate. */ switch (nfsvers) { case NFS_V4: fstype = MNTTYPE_NFS4; break; case NFS_V3: fstype = MNTTYPE_NFS3; if (use_pubfh == FALSE) { mountversmax = MOUNTVERS3; versmin = MOUNTVERS3; } break; case NFS_VERSION: fstype = MNTTYPE_NFS; if (use_pubfh == FALSE) { mountversmax = MOUNTVERS_POSIX; versmin = MOUNTVERS; } break; } /* * Our goal here is to evaluate each of several possible * replicas and try to come up with a list we can hand * to mount(2). If we don't have a valid "head" at the * end of this process, it means we have rejected all * potential server:/path tuples. We will fail quietly * in front of mount(2), and will have printed errors * where we found them. * XXX - do option work outside loop w careful design * XXX - use macro for error condition free handling */ for (mfs = mfs_in; mfs; mfs = mfs->mfs_next) { /* * Initialize retry and delay values on a per-server basis. */ retries = get_retry(opts); delay = INITDELAY; retry: if (mfs->mfs_ignore) continue; /* * If we don't have a fh yet, and if this is not a replicated * mount, we haven't done a pingnfs() on the next entry, * so we don't know if the next entry is up or if it * supports an NFS version we like. So if we had a problem * with an entry, we need to go back and run through some new * code. */ if ((mfs->mfs_flags & MFS_FH_VIA_WEBNFS) == 0 && !replicated && skipentry) goto nextentry; vers = mountversmax; host = mfs->mfs_host; dir = mfs->mfs_dir; /* * Remember the possible '[a:d:d:r:e:s:s]' as the address to be * later passed to mount(2) and used in the mnttab line, but * only use 'a:d:d:r:e:s:s' for communication */ rhost = strdup(host); if (rhost == NULL) { syslog(LOG_ERR, "nfsmount: no memory"); last_error = NFSERR_IO; goto out; } unbracket(&host); (void) sprintf(remname, "%s:%s", rhost, dir); if (trace > 4 && replicated) trace_prt(1, " nfsmount: examining %s\n", remname); /* * If it's cached we need to get cachefs to mount it. */ if (cached) { char *copts = opts; /* * If we started with a URL we need to turn on * -o public if not on already */ if (use_pubfh == FALSE && (mfs->mfs_flags & MFS_FH_VIA_WEBNFS)) { copts = malloc(strlen(opts) + strlen(",public")+1); if (copts == NULL) { syslog(LOG_ERR, "nfsmount: no memory"); last_error = NFSERR_IO; goto out; } strcpy(copts, opts); if (strlen(copts) != 0) strcat(copts, ","); strcat(copts, "public"); } last_error = mount_generic(remname, MNTTYPE_CACHEFS, copts, mntpnt, overlay); if (copts != opts) free(copts); if (last_error) { skipentry = 1; mfs->mfs_ignore = 1; continue; } goto out; } if (mfs->mfs_args == NULL) { /* * Allocate nfs_args structure */ argp = (struct nfs_args *) malloc(sizeof (struct nfs_args)); if (!argp) { syslog(LOG_ERR, "nfsmount: no memory"); last_error = NFSERR_IO; goto out; } (void) memset(argp, 0, sizeof (*argp)); /* * RDMA support * By now Mount argument struct has been allocated, * either a pub_fh path will be taken or the regular * one. So here if a protocol was specified and it * was not rdma we let it be, else we set DO_RDMA. * If no proto was there we advise on trying RDMA. */ if (nfs_proto) { if (strcmp(nfs_proto, "rdma") == 0) { free(nfs_proto); nfs_proto = NULL; argp->flags |= NFSMNT_DORDMA; } } else argp->flags |= NFSMNT_TRYRDMA; } else { argp = mfs->mfs_args; mfs->mfs_args = NULL; /* * Skip entry if we already have file handle but the * NFS version is wrong. */ if ((mfs->mfs_flags & MFS_FH_VIA_WEBNFS) && mfs->mfs_version != nfsvers) { free(argp); skipentry = 1; mfs->mfs_ignore = 1; continue; } } prevhead = head; prevtail = tail; if (!head) head = tail = argp; else tail = tail->nfs_ext_u.nfs_extB.next = argp; /* * WebNFS and NFSv4 behave similarly in that they * don't use the mount protocol. Therefore, avoid * mount protocol like things when version 4 is being * used. */ if ((mfs->mfs_flags & MFS_FH_VIA_WEBNFS) == 0 && nfsvers != NFS_V4) { timeout.tv_usec = 0; timeout.tv_sec = rpc_timeout; rpc_stat = RPC_TIMEDOUT; /* Create the client handle. */ if (trace > 1) { trace_prt(1, " nfsmount: Get mount version: request " "vers=%d min=%d\n", vers, versmin); } while ((cl = clnt_create_vers(host, MOUNTPROG, &outvers, versmin, vers, "udp")) == NULL) { if (trace > 4) { trace_prt(1, " nfsmount: Can't get mount " "version: rpcerr=%d\n", rpc_createerr.cf_stat); } if (rpc_createerr.cf_stat == RPC_UNKNOWNHOST || rpc_createerr.cf_stat == RPC_TIMEDOUT) break; /* * backoff and return lower version to retry the ping. * XXX we should be more careful and handle * RPC_PROGVERSMISMATCH here, because that error * is handled in clnt_create_vers(). It's not done to * stay in sync with the nfs mount command. */ vers--; if (vers < versmin) break; if (trace > 4) { trace_prt(1, " nfsmount: Try version=%d\n", vers); } } if (cl == NULL) { free(argp); head = prevhead; tail = prevtail; if (tail) tail->nfs_ext_u.nfs_extB.next = NULL; last_error = NFSERR_NOENT; if (rpc_createerr.cf_stat != RPC_UNKNOWNHOST && rpc_createerr.cf_stat != RPC_PROGVERSMISMATCH && retries-- > 0) { DELAY(delay); goto retry; } syslog(loglevel, "%s %s", host, clnt_spcreateerror( "server not responding")); skipentry = 1; mfs->mfs_ignore = 1; continue; } if (trace > 1) { trace_prt(1, " nfsmount: mount version=%d\n", outvers); } #ifdef MALLOC_DEBUG add_alloc("CLNT_HANDLE", cl, 0, __FILE__, __LINE__); add_alloc("AUTH_HANDLE", cl->cl_auth, 0, __FILE__, __LINE__); #endif if (__clnt_bindresvport(cl) < 0) { free(argp); head = prevhead; tail = prevtail; if (tail) tail->nfs_ext_u.nfs_extB.next = NULL; last_error = NFSERR_NOENT; if (retries-- > 0) { destroy_auth_client_handle(cl); DELAY(delay); goto retry; } syslog(loglevel, "mount %s: %s", host, "Couldn't bind to reserved port"); destroy_auth_client_handle(cl); skipentry = 1; mfs->mfs_ignore = 1; continue; } #ifdef MALLOC_DEBUG drop_alloc("AUTH_HANDLE", cl->cl_auth, __FILE__, __LINE__); #endif AUTH_DESTROY(cl->cl_auth); if ((cl->cl_auth = authsys_create_default()) == NULL) { free(argp); head = prevhead; tail = prevtail; if (tail) tail->nfs_ext_u.nfs_extB.next = NULL; last_error = NFSERR_NOENT; if (retries-- > 0) { destroy_auth_client_handle(cl); DELAY(delay); goto retry; } syslog(loglevel, "mount %s: %s", host, "Failed creating default auth handle"); destroy_auth_client_handle(cl); skipentry = 1; mfs->mfs_ignore = 1; continue; } #ifdef MALLOC_DEBUG add_alloc("AUTH_HANDLE", cl->cl_auth, 0, __FILE__, __LINE__); #endif } else cl = NULL; /* * set security options */ sec_opt = 0; (void) memset(&nfs_sec, 0, sizeof (nfs_sec)); if (hasmntopt(&m, MNTOPT_SECURE) != NULL) { if (++sec_opt > 1) { syslog(loglevel, "conflicting security options for %s", remname); free(argp); head = prevhead; tail = prevtail; if (tail) tail->nfs_ext_u.nfs_extB.next = NULL; last_error = NFSERR_IO; destroy_auth_client_handle(cl); skipentry = 1; mfs->mfs_ignore = 1; continue; } if (nfs_getseconfig_byname("dh", &nfs_sec)) { syslog(loglevel, "error getting dh information from %s", NFSSEC_CONF); free(argp); head = prevhead; tail = prevtail; if (tail) tail->nfs_ext_u.nfs_extB.next = NULL; last_error = NFSERR_IO; destroy_auth_client_handle(cl); skipentry = 1; mfs->mfs_ignore = 1; continue; } } nfs_flavor = NULL; if (hasmntopt(&m, MNTOPT_SEC) != NULL) { if ((str_opt(&m, MNTOPT_SEC, &nfs_flavor)) == -1) { syslog(LOG_ERR, "nfsmount: no memory"); last_error = NFSERR_IO; destroy_auth_client_handle(cl); goto out; } } if (nfs_flavor) { if (++sec_opt > 1) { syslog(loglevel, "conflicting security options for %s", remname); free(nfs_flavor); free(argp); head = prevhead; tail = prevtail; if (tail) tail->nfs_ext_u.nfs_extB.next = NULL; last_error = NFSERR_IO; destroy_auth_client_handle(cl); skipentry = 1; mfs->mfs_ignore = 1; continue; } if (nfs_getseconfig_byname(nfs_flavor, &nfs_sec)) { syslog(loglevel, "error getting %s information from %s", nfs_flavor, NFSSEC_CONF); free(nfs_flavor); free(argp); head = prevhead; tail = prevtail; if (tail) tail->nfs_ext_u.nfs_extB.next = NULL; last_error = NFSERR_IO; destroy_auth_client_handle(cl); skipentry = 1; mfs->mfs_ignore = 1; continue; } free(nfs_flavor); } posix = (nfsvers != NFS_V4 && hasmntopt(&m, MNTOPT_POSIX) != NULL) ? 1 : 0; if ((mfs->mfs_flags & MFS_FH_VIA_WEBNFS) == 0 && nfsvers != NFS_V4) { bool_t give_up_on_mnt; bool_t got_mnt_error; /* * If we started with a URL, if first byte of path is not "/", * then the mount will likely fail, so we should try again * with a prepended "/". */ if (mfs->mfs_flags & MFS_ALLOC_DIR && *dir != '/') give_up_on_mnt = FALSE; else give_up_on_mnt = TRUE; got_mnt_error = FALSE; try_mnt_slash: if (got_mnt_error == TRUE) { int i, l; give_up_on_mnt = TRUE; l = strlen(dir); /* * Insert a "/" to front of mfs_dir. */ for (i = l; i > 0; i--) dir[i] = dir[i-1]; dir[0] = '/'; } /* Get fhandle of remote path from server's mountd */ switch (outvers) { case MOUNTVERS: if (posix) { free(argp); head = prevhead; tail = prevtail; if (tail) tail->nfs_ext_u.nfs_extB.next = NULL; last_error = NFSERR_NOENT; syslog(loglevel, "can't get posix info for %s", host); destroy_auth_client_handle(cl); skipentry = 1; mfs->mfs_ignore = 1; continue; } /* FALLTHRU */ case MOUNTVERS_POSIX: if (nfsvers == NFS_V3) { free(argp); head = prevhead; tail = prevtail; if (tail) tail->nfs_ext_u.nfs_extB.next = NULL; last_error = NFSERR_NOENT; syslog(loglevel, "%s doesn't support NFS Version 3", host); destroy_auth_client_handle(cl); skipentry = 1; mfs->mfs_ignore = 1; continue; } rpc_stat = clnt_call(cl, MOUNTPROC_MNT, xdr_dirpath, (caddr_t)&dir, xdr_fhstatus, (caddr_t)&fhs, timeout); if (rpc_stat != RPC_SUCCESS) { if (give_up_on_mnt == FALSE) { got_mnt_error = TRUE; goto try_mnt_slash; } /* * Given the way "clnt_sperror" works, the "%s" * immediately following the "not responding" * is correct. */ free(argp); head = prevhead; tail = prevtail; if (tail) tail->nfs_ext_u.nfs_extB.next = NULL; last_error = NFSERR_NOENT; if (retries-- > 0) { destroy_auth_client_handle(cl); DELAY(delay); goto retry; } if (trace > 3) { trace_prt(1, " nfsmount: mount RPC " "failed for %s\n", host); } syslog(loglevel, "%s server not responding%s", host, clnt_sperror(cl, "")); destroy_auth_client_handle(cl); skipentry = 1; mfs->mfs_ignore = 1; continue; } if ((errno = fhs.fhs_status) != MNT_OK) { if (give_up_on_mnt == FALSE) { got_mnt_error = TRUE; goto try_mnt_slash; } free(argp); head = prevhead; tail = prevtail; if (tail) tail->nfs_ext_u.nfs_extB.next = NULL; if (errno == EACCES) { status = NFSERR_ACCES; } else { syslog(loglevel, "%s: %m", host); status = NFSERR_IO; } if (trace > 3) { trace_prt(1, " nfsmount: mount RPC gave" " %d for %s:%s\n", errno, host, dir); } last_error = status; destroy_auth_client_handle(cl); skipentry = 1; mfs->mfs_ignore = 1; continue; } argp->fh = malloc((sizeof (fhandle))); if (!argp->fh) { syslog(LOG_ERR, "nfsmount: no memory"); last_error = NFSERR_IO; destroy_auth_client_handle(cl); goto out; } (void) memcpy(argp->fh, &fhs.fhstatus_u.fhs_fhandle, sizeof (fhandle)); break; case MOUNTVERS3: posix = 0; (void) memset((char *)&res3, '\0', sizeof (res3)); rpc_stat = clnt_call(cl, MOUNTPROC_MNT, xdr_dirpath, (caddr_t)&dir, xdr_mountres3, (caddr_t)&res3, timeout); if (rpc_stat != RPC_SUCCESS) { if (give_up_on_mnt == FALSE) { got_mnt_error = TRUE; goto try_mnt_slash; } /* * Given the way "clnt_sperror" works, the "%s" * immediately following the "not responding" * is correct. */ free(argp); head = prevhead; tail = prevtail; if (tail) tail->nfs_ext_u.nfs_extB.next = NULL; last_error = NFSERR_NOENT; if (retries-- > 0) { destroy_auth_client_handle(cl); DELAY(delay); goto retry; } if (trace > 3) { trace_prt(1, " nfsmount: mount RPC " "failed for %s\n", host); } syslog(loglevel, "%s server not responding%s", remname, clnt_sperror(cl, "")); destroy_auth_client_handle(cl); skipentry = 1; mfs->mfs_ignore = 1; continue; } if ((errno = res3.fhs_status) != MNT_OK) { if (give_up_on_mnt == FALSE) { got_mnt_error = TRUE; goto try_mnt_slash; } free(argp); head = prevhead; tail = prevtail; if (tail) tail->nfs_ext_u.nfs_extB.next = NULL; if (errno == EACCES) { status = NFSERR_ACCES; } else { syslog(loglevel, "%s: %m", remname); status = NFSERR_IO; } if (trace > 3) { trace_prt(1, " nfsmount: mount RPC gave" " %d for %s:%s\n", errno, host, dir); } last_error = status; destroy_auth_client_handle(cl); skipentry = 1; mfs->mfs_ignore = 1; continue; } /* * Negotiate the security flavor for nfs_mount */ auths = res3.mountres3_u.mountinfo. auth_flavors.auth_flavors_val; count = res3.mountres3_u.mountinfo. auth_flavors.auth_flavors_len; if (sec_opt) { for (i = 0; i < count; i++) if (auths[i] == nfs_sec.sc_nfsnum) { break; } if (i >= count) { syslog(LOG_ERR, "%s: does not support " "security \"%s\"\n", remname, nfs_sec.sc_name); clnt_freeres(cl, xdr_mountres3, (caddr_t)&res3); free(argp); head = prevhead; tail = prevtail; if (tail) tail->nfs_ext_u. nfs_extB.next = NULL; last_error = NFSERR_IO; destroy_auth_client_handle(cl); skipentry = 1; mfs->mfs_ignore = 1; continue; } } else if (count > 0) { for (i = 0; i < count; i++) { if (!(scerror = nfs_getseconfig_bynumber( auths[i], &nfs_sec))) { sec_opt++; break; } } if (i >= count) { if (nfs_syslog_scerr(scerror, scerror_msg) != -1) { syslog(LOG_ERR, "%s cannot be " "mounted because it" " is shared with " "security flavor %d" " which %s", remname, auths[i-1], scerror_msg); } clnt_freeres(cl, xdr_mountres3, (caddr_t)&res3); free(argp); head = prevhead; tail = prevtail; if (tail) tail->nfs_ext_u. nfs_extB.next = NULL; last_error = NFSERR_IO; destroy_auth_client_handle(cl); skipentry = 1; mfs->mfs_ignore = 1; continue; } } fh3.fh3_length = res3.mountres3_u.mountinfo.fhandle. fhandle3_len; (void) memcpy(fh3.fh3_u.data, res3.mountres3_u.mountinfo.fhandle. fhandle3_val, fh3.fh3_length); clnt_freeres(cl, xdr_mountres3, (caddr_t)&res3); argp->fh = malloc(sizeof (nfs_fh3)); if (!argp->fh) { syslog(LOG_ERR, "nfsmount: no memory"); last_error = NFSERR_IO; destroy_auth_client_handle(cl); goto out; } (void) memcpy(argp->fh, &fh3, sizeof (nfs_fh3)); break; default: free(argp); head = prevhead; tail = prevtail; if (tail) tail->nfs_ext_u.nfs_extB.next = NULL; last_error = NFSERR_NOENT; syslog(loglevel, "unknown MOUNT version %ld on %s", vers, remname); destroy_auth_client_handle(cl); skipentry = 1; mfs->mfs_ignore = 1; continue; } /* switch */ } if (nfsvers == NFS_V4) { argp->fh = strdup(dir); if (argp->fh == NULL) { syslog(LOG_ERR, "nfsmount: no memory"); last_error = NFSERR_IO; goto out; } } if (trace > 4) trace_prt(1, " nfsmount: have %s filehandle for %s\n", fstype, remname); argp->flags |= NFSMNT_NEWARGS; argp->flags |= NFSMNT_INT; /* default is "intr" */ argp->flags |= NFSMNT_HOSTNAME; argp->hostname = strdup(host); if (argp->hostname == NULL) { syslog(LOG_ERR, "nfsmount: no memory"); last_error = NFSERR_IO; goto out; } /* * In this case, we want NFSv4 to behave like * non-WebNFS so that we get the server address. */ if ((mfs->mfs_flags & MFS_FH_VIA_WEBNFS) == 0) { nconf = NULL; if (nfs_port != 0) thisport = nfs_port; else thisport = mfs->mfs_port; /* * For NFSv4, we want to avoid rpcbind, so call * get_server_stuff() directly to tell it that * we want to go "direct_to_server". Otherwise, * do what has always been done. */ if (nfsvers == NFS_V4) { enum clnt_stat cstat; argp->addr = get_server_stuff(SERVER_ADDR, host, NFS_PROGRAM, nfsvers, NULL, &nconf, nfs_proto, thisport, NULL, NULL, TRUE, NULL, &cstat); } else { argp->addr = get_addr(host, NFS_PROGRAM, nfsvers, &nconf, nfs_proto, thisport, NULL); } if (argp->addr == NULL) { if (argp->hostname) free(argp->hostname); free(argp->fh); free(argp); head = prevhead; tail = prevtail; if (tail) tail->nfs_ext_u.nfs_extB.next = NULL; last_error = NFSERR_NOENT; if (retries-- > 0) { destroy_auth_client_handle(cl); DELAY(delay); goto retry; } syslog(loglevel, "%s: no NFS service", host); destroy_auth_client_handle(cl); skipentry = 1; mfs->mfs_ignore = 1; continue; } if (trace > 4) trace_prt(1, "\tnfsmount: have net address for %s\n", remname); } else { nconf = mfs->mfs_nconf; mfs->mfs_nconf = NULL; } argp->flags |= NFSMNT_KNCONF; argp->knconf = get_knconf(nconf); if (argp->knconf == NULL) { netbuf_free(argp->addr); freenetconfigent(nconf); if (argp->hostname) free(argp->hostname); free(argp->fh); free(argp); head = prevhead; tail = prevtail; if (tail) tail->nfs_ext_u.nfs_extB.next = NULL; last_error = NFSERR_NOSPC; destroy_auth_client_handle(cl); skipentry = 1; mfs->mfs_ignore = 1; continue; } if (trace > 4) trace_prt(1, "\tnfsmount: have net config for %s\n", remname); if (hasmntopt(&m, MNTOPT_SOFT) != NULL) { argp->flags |= NFSMNT_SOFT; } if (hasmntopt(&m, MNTOPT_NOINTR) != NULL) { argp->flags &= ~(NFSMNT_INT); } if (hasmntopt(&m, MNTOPT_NOAC) != NULL) { argp->flags |= NFSMNT_NOAC; } if (hasmntopt(&m, MNTOPT_NOCTO) != NULL) { argp->flags |= NFSMNT_NOCTO; } if (hasmntopt(&m, MNTOPT_FORCEDIRECTIO) != NULL) { argp->flags |= NFSMNT_DIRECTIO; } if (hasmntopt(&m, MNTOPT_NOFORCEDIRECTIO) != NULL) { argp->flags &= ~(NFSMNT_DIRECTIO); } /* * Set up security data for argp->nfs_ext_u.nfs_extB.secdata. */ if (mfssnego.snego_done) { memcpy(&nfs_sec, &mfssnego.nfs_sec, sizeof (seconfig_t)); } else if (!sec_opt) { /* * Get default security mode. */ if (nfs_getseconfig_default(&nfs_sec)) { syslog(loglevel, "error getting default security entry\n"); free_knconf(argp->knconf); netbuf_free(argp->addr); freenetconfigent(nconf); if (argp->hostname) free(argp->hostname); free(argp->fh); free(argp); head = prevhead; tail = prevtail; if (tail) tail->nfs_ext_u.nfs_extB.next = NULL; last_error = NFSERR_NOSPC; destroy_auth_client_handle(cl); skipentry = 1; mfs->mfs_ignore = 1; continue; } argp->flags |= NFSMNT_SECDEFAULT; } /* * For AUTH_DH * get the network address for the time service on * the server. If an RPC based time service is * not available then try the IP time service. * * Eventurally, we want to move this code to nfs_clnt_secdata() * when autod_nfs.c and mount.c can share the same * get_the_addr/get_the_stuff routine. */ secflags = 0; syncaddr = NULL; retaddrs = NULL; if (nfs_sec.sc_rpcnum == AUTH_DH || nfsvers == NFS_V4) { /* * If not using the public fh and not NFS_V4, we can try * talking RPCBIND. Otherwise, assume that firewalls * prevent us from doing that. */ if ((mfs->mfs_flags & MFS_FH_VIA_WEBNFS) == 0 && nfsvers != NFS_V4) { syncaddr = get_the_stuff(SERVER_ADDR, host, RPCBPROG, RPCBVERS, NULL, nconf, 0, NULL, NULL, FALSE, NULL, NULL); } if (syncaddr != NULL) { /* for flags in sec_data */ secflags |= AUTH_F_RPCTIMESYNC; } else { struct nd_hostserv hs; int error; hs.h_host = host; hs.h_serv = "timserver"; error = netdir_getbyname(nconf, &hs, &retaddrs); if (error != ND_OK && nfs_sec.sc_rpcnum == AUTH_DH) { syslog(loglevel, "%s: secure: no time service\n", host); free_knconf(argp->knconf); netbuf_free(argp->addr); freenetconfigent(nconf); if (argp->hostname) free(argp->hostname); free(argp->fh); free(argp); head = prevhead; tail = prevtail; if (tail) tail->nfs_ext_u.nfs_extB.next = NULL; last_error = NFSERR_IO; destroy_auth_client_handle(cl); skipentry = 1; mfs->mfs_ignore = 1; continue; } if (error == ND_OK) syncaddr = retaddrs->n_addrs; /* * For potential usage by NFS V4 when AUTH_DH * is negotiated via SECINFO in the kernel. */ if (nfsvers == NFS_V4 && syncaddr && host2netname(netname, host, NULL)) { argp->syncaddr = malloc(sizeof (struct netbuf)); argp->syncaddr->buf = malloc(syncaddr->len); (void) memcpy(argp->syncaddr->buf, syncaddr->buf, syncaddr->len); argp->syncaddr->len = syncaddr->len; argp->syncaddr->maxlen = syncaddr->maxlen; argp->netname = strdup(netname); argp->flags |= NFSMNT_SECURE; } } /* syncaddr */ } /* AUTH_DH */ /* * TSOL notes: automountd in tsol extension * has "read down" capability, i.e. we allow * a user to trigger an nfs mount into a lower * labeled zone. We achieve this by always having * root issue the mount request so that the * lookup ops can go past /zone/<zone_name> * on the server side. */ if (is_system_labeled()) nfs_sec.sc_uid = (uid_t)0; else nfs_sec.sc_uid = uid; /* * If AUTH_DH is a chosen flavor now, its data will be stored * in the sec_data structure via nfs_clnt_secdata(). */ if (!(secdata = nfs_clnt_secdata(&nfs_sec, host, argp->knconf, syncaddr, secflags))) { syslog(LOG_ERR, "errors constructing security related data\n"); if (secflags & AUTH_F_RPCTIMESYNC) netbuf_free(syncaddr); else if (retaddrs) netdir_free(retaddrs, ND_ADDRLIST); if (argp->syncaddr) netbuf_free(argp->syncaddr); if (argp->netname) free(argp->netname); if (argp->hostname) free(argp->hostname); free_knconf(argp->knconf); netbuf_free(argp->addr); freenetconfigent(nconf); free(argp->fh); free(argp); head = prevhead; tail = prevtail; if (tail) tail->nfs_ext_u.nfs_extB.next = NULL; last_error = NFSERR_IO; destroy_auth_client_handle(cl); skipentry = 1; mfs->mfs_ignore = 1; continue; } NFS_ARGS_EXTB_secdata(*argp, secdata); /* end of security stuff */ if (trace > 4) trace_prt(1, " nfsmount: have secure info for %s\n", remname); if (hasmntopt(&m, MNTOPT_GRPID) != NULL) { argp->flags |= NFSMNT_GRPID; } if (nopt(&m, MNTOPT_RSIZE, &argp->rsize)) { argp->flags |= NFSMNT_RSIZE; } if (nopt(&m, MNTOPT_WSIZE, &argp->wsize)) { argp->flags |= NFSMNT_WSIZE; } if (nopt(&m, MNTOPT_TIMEO, &argp->timeo)) { argp->flags |= NFSMNT_TIMEO; } if (nopt(&m, MNTOPT_RETRANS, &argp->retrans)) { argp->flags |= NFSMNT_RETRANS; } if (nopt(&m, MNTOPT_ACTIMEO, &argp->acregmax)) { argp->flags |= NFSMNT_ACREGMAX; argp->flags |= NFSMNT_ACDIRMAX; argp->flags |= NFSMNT_ACDIRMIN; argp->flags |= NFSMNT_ACREGMIN; argp->acdirmin = argp->acregmin = argp->acdirmax = argp->acregmax; } else { if (nopt(&m, MNTOPT_ACREGMIN, &argp->acregmin)) { argp->flags |= NFSMNT_ACREGMIN; } if (nopt(&m, MNTOPT_ACREGMAX, &argp->acregmax)) { argp->flags |= NFSMNT_ACREGMAX; } if (nopt(&m, MNTOPT_ACDIRMIN, &argp->acdirmin)) { argp->flags |= NFSMNT_ACDIRMIN; } if (nopt(&m, MNTOPT_ACDIRMAX, &argp->acdirmax)) { argp->flags |= NFSMNT_ACDIRMAX; } } if (posix) { argp->pathconf = NULL; if (error = get_pathconf(cl, dir, remname, &argp->pathconf, retries)) { if (secflags & AUTH_F_RPCTIMESYNC) netbuf_free(syncaddr); else if (retaddrs) netdir_free(retaddrs, ND_ADDRLIST); free_knconf(argp->knconf); netbuf_free(argp->addr); freenetconfigent(nconf); nfs_free_secdata( argp->nfs_ext_u.nfs_extB.secdata); if (argp->syncaddr) netbuf_free(argp->syncaddr); if (argp->netname) free(argp->netname); if (argp->hostname) free(argp->hostname); free(argp->fh); free(argp); head = prevhead; tail = prevtail; if (tail) tail->nfs_ext_u.nfs_extB.next = NULL; last_error = NFSERR_IO; if (error == RET_RETRY && retries-- > 0) { destroy_auth_client_handle(cl); DELAY(delay); goto retry; } destroy_auth_client_handle(cl); skipentry = 1; mfs->mfs_ignore = 1; continue; } argp->flags |= NFSMNT_POSIX; if (trace > 4) trace_prt(1, " nfsmount: have pathconf for %s\n", remname); } /* * free loop-specific data structures */ destroy_auth_client_handle(cl); freenetconfigent(nconf); if (secflags & AUTH_F_RPCTIMESYNC) netbuf_free(syncaddr); else if (retaddrs) netdir_free(retaddrs, ND_ADDRLIST); /* * Decide whether to use remote host's lockd or local locking. * If we are using the public fh, we've already turned * LLOCK on. */ if (hasmntopt(&m, MNTOPT_LLOCK)) argp->flags |= NFSMNT_LLOCK; if (!(argp->flags & NFSMNT_LLOCK) && nfsvers == NFS_VERSION && remote_lock(host, argp->fh)) { syslog(loglevel, "No network locking on %s : " "contact admin to install server change", host); argp->flags |= NFSMNT_LLOCK; } /* * Build a string for /etc/mnttab. * If possible, coalesce strings with same 'dir' info. */ if ((mfs->mfs_flags & MFS_URL) == 0) { char *tmp; if (mnttabcnt) { p = strrchr(mnttabtext, (int)':'); if (!p || strcmp(p+1, dir) != 0) { mnttabcnt += strlen(remname) + 2; } else { *p = '\0'; mnttabcnt += strlen(rhost) + 2; } if ((tmp = realloc(mnttabtext, mnttabcnt)) != NULL) { mnttabtext = tmp; strcat(mnttabtext, ","); } else { free(mnttabtext); mnttabtext = NULL; } } else { mnttabcnt = strlen(remname) + 1; if ((mnttabtext = malloc(mnttabcnt)) != NULL) mnttabtext[0] = '\0'; } if (mnttabtext != NULL) strcat(mnttabtext, remname); } else { char *tmp; int more_cnt = 0; char sport[16]; more_cnt += strlen("nfs://"); more_cnt += strlen(mfs->mfs_host); if (mfs->mfs_port != 0) { (void) sprintf(sport, ":%u", mfs->mfs_port); } else sport[0] = '\0'; more_cnt += strlen(sport); more_cnt += 1; /* "/" */ more_cnt += strlen(mfs->mfs_dir); if (mnttabcnt) { more_cnt += 1; /* "," */ mnttabcnt += more_cnt; if ((tmp = realloc(mnttabtext, mnttabcnt)) != NULL) { mnttabtext = tmp; strcat(mnttabtext, ","); } else { free(mnttabtext); mnttabtext = NULL; } } else { mnttabcnt = more_cnt + 1; if ((mnttabtext = malloc(mnttabcnt)) != NULL) mnttabtext[0] = '\0'; } if (mnttabtext != NULL) { strcat(mnttabtext, "nfs://"); strcat(mnttabtext, mfs->mfs_host); strcat(mnttabtext, sport); strcat(mnttabtext, "/"); strcat(mnttabtext, mfs->mfs_dir); } } if (!mnttabtext) { syslog(LOG_ERR, "nfsmount: no memory"); last_error = NFSERR_IO; goto out; } /* * At least one entry, can call mount(2). */ entries++; /* * If replication was defeated, don't do more work */ if (!replicated) break; } /* * Did we get through all possibilities without success? */ if (!entries) goto out; /* Make "xattr" the default if "noxattr" is not specified. */ strcpy(mopts, opts); if (!hasmntopt(&m, MNTOPT_NOXATTR) && !hasmntopt(&m, MNTOPT_XATTR)) { if (strlen(mopts) > 0) strcat(mopts, ","); strcat(mopts, "xattr"); } /* * enable services as needed. */ { char **sl; if (strcmp(fstype, MNTTYPE_NFS4) == 0) sl = service_list_v4; else sl = service_list; (void) _check_services(sl); } /* * Whew; do the mount, at last. */ if (trace > 1) { trace_prt(1, " mount %s %s (%s)\n", mnttabtext, mntpnt, mopts); } /* * About to do a nfs mount, make sure the mount_to is set for * potential ephemeral mounts with NFSv4. */ set_nfsv4_ephemeral_mount_to(); /* * If no action list pointer then do the mount, otherwise * build the actions list pointer with the mount information. * so the mount can be done in the kernel. */ if (alp == NULL) { if (mount(mnttabtext, mntpnt, flags | MS_DATA, fstype, head, sizeof (*head), mopts, MAX_MNTOPT_STR) < 0) { if (trace > 1) trace_prt(1, " Mount of %s on %s: %d\n", mnttabtext, mntpnt, errno); if (errno != EBUSY || verbose) syslog(LOG_ERR, "Mount of %s on %s: %m", mnttabtext, mntpnt); last_error = NFSERR_IO; goto out; } last_error = NFS_OK; if (stat(mntpnt, &stbuf) == 0) { if (trace > 1) { trace_prt(1, " mount %s dev=%x rdev=%x OK\n", mnttabtext, stbuf.st_dev, stbuf.st_rdev); } } else { if (trace > 1) { trace_prt(1, " mount %s OK\n", mnttabtext); trace_prt(1, " stat of %s failed\n", mntpnt); } } } else { alp->action.action = AUTOFS_MOUNT_RQ; alp->action.action_list_entry_u.mounta.spec = strdup(mnttabtext); alp->action.action_list_entry_u.mounta.dir = strdup(mntpnt); alp->action.action_list_entry_u.mounta.flags = flags | MS_DATA; alp->action.action_list_entry_u.mounta.fstype = strdup(fstype); alp->action.action_list_entry_u.mounta.dataptr = (char *)head; alp->action.action_list_entry_u.mounta.datalen = sizeof (*head); mntopts = malloc(strlen(mopts) + 1); strcpy(mntopts, mopts); mntopts[strlen(mopts)] = '\0'; alp->action.action_list_entry_u.mounta.optptr = mntopts; alp->action.action_list_entry_u.mounta.optlen = strlen(mntopts) + 1; last_error = NFS_OK; goto ret; } out: argp = head; while (argp) { if (argp->pathconf) free(argp->pathconf); free_knconf(argp->knconf); netbuf_free(argp->addr); if (argp->syncaddr) netbuf_free(argp->syncaddr); if (argp->netname) { free(argp->netname); } if (argp->hostname) free(argp->hostname); nfs_free_secdata(argp->nfs_ext_u.nfs_extB.secdata); free(argp->fh); head = argp; argp = argp->nfs_ext_u.nfs_extB.next; free(head); } ret: if (nfs_proto) free(nfs_proto); if (mnttabtext) free(mnttabtext); for (mfs = mfs_in; mfs; mfs = mfs->mfs_next) { if (mfs->mfs_flags & MFS_ALLOC_DIR) { free(mfs->mfs_dir); mfs->mfs_dir = NULL; mfs->mfs_flags &= ~MFS_ALLOC_DIR; } if (mfs->mfs_args != NULL && alp == NULL) { free(mfs->mfs_args); mfs->mfs_args = NULL; } if (mfs->mfs_nconf != NULL) { freenetconfigent(mfs->mfs_nconf); mfs->mfs_nconf = NULL; } } return (last_error); } /* * get_pathconf(cl, path, fsname, pcnf, cretries) * ugliness that requires that ppathcnf and pathcnf stay consistent * cretries is a copy of retries used to determine when to syslog * on retry situations. */ static int get_pathconf(CLIENT *cl, char *path, char *fsname, struct pathcnf **pcnf, int cretries) { struct ppathcnf *p = NULL; enum clnt_stat rpc_stat; struct timeval timeout; p = (struct ppathcnf *)malloc(sizeof (struct ppathcnf)); if (p == NULL) { syslog(LOG_ERR, "get_pathconf: Out of memory"); return (RET_ERR); } memset((caddr_t)p, 0, sizeof (struct ppathcnf)); timeout.tv_sec = 10; timeout.tv_usec = 0; rpc_stat = clnt_call(cl, MOUNTPROC_PATHCONF, xdr_dirpath, (caddr_t)&path, xdr_ppathcnf, (caddr_t)p, timeout); if (rpc_stat != RPC_SUCCESS) { if (cretries-- <= 0) { syslog(LOG_ERR, "get_pathconf: %s: server not responding: %s", fsname, clnt_sperror(cl, "")); } free(p); return (RET_RETRY); } if (_PC_ISSET(_PC_ERROR, p->pc_mask)) { syslog(LOG_ERR, "get_pathconf: no info for %s", fsname); free(p); return (RET_ERR); } *pcnf = (struct pathcnf *)p; return (RET_OK); } struct knetconfig * get_knconf(nconf) struct netconfig *nconf; { struct stat stbuf; struct knetconfig *k; if (stat(nconf->nc_device, &stbuf) < 0) { syslog(LOG_ERR, "get_knconf: stat %s: %m", nconf->nc_device); return (NULL); } k = (struct knetconfig *)malloc(sizeof (*k)); if (k == NULL) goto nomem; k->knc_semantics = nconf->nc_semantics; k->knc_protofmly = strdup(nconf->nc_protofmly); if (k->knc_protofmly == NULL) goto nomem; k->knc_proto = strdup(nconf->nc_proto); if (k->knc_proto == NULL) goto nomem; k->knc_rdev = stbuf.st_rdev; return (k); nomem: syslog(LOG_ERR, "get_knconf: no memory"); free_knconf(k); return (NULL); } void free_knconf(k) struct knetconfig *k; { if (k == NULL) return; if (k->knc_protofmly) free(k->knc_protofmly); if (k->knc_proto) free(k->knc_proto); free(k); } void netbuf_free(nb) struct netbuf *nb; { if (nb == NULL) return; if (nb->buf) free(nb->buf); free(nb); } #define SMALL_HOSTNAME 20 #define SMALL_PROTONAME 10 #define SMALL_PROTOFMLYNAME 10 struct portmap_cache { int cache_prog; int cache_vers; time_t cache_time; char cache_small_hosts[SMALL_HOSTNAME + 1]; char *cache_hostname; char *cache_proto; char *cache_protofmly; char cache_small_protofmly[SMALL_PROTOFMLYNAME + 1]; char cache_small_proto[SMALL_PROTONAME + 1]; struct netbuf cache_srv_addr; struct portmap_cache *cache_prev, *cache_next; }; rwlock_t portmap_cache_lock; static int portmap_cache_valid_time = 30; struct portmap_cache *portmap_cache_head, *portmap_cache_tail; #ifdef MALLOC_DEBUG void portmap_cache_flush() { struct portmap_cache *next = NULL, *cp; (void) rw_wrlock(&portmap_cache_lock); for (cp = portmap_cache_head; cp; cp = cp->cache_next) { if (cp->cache_hostname != NULL && cp->cache_hostname != cp->cache_small_hosts) free(cp->cache_hostname); if (cp->cache_proto != NULL && cp->cache_proto != cp->cache_small_proto) free(cp->cache_proto); if (cp->cache_srv_addr.buf != NULL) free(cp->cache_srv_addr.buf); next = cp->cache_next; free(cp); } portmap_cache_head = NULL; portmap_cache_tail = NULL; (void) rw_unlock(&portmap_cache_lock); } #endif /* * Returns 1 if the entry is found in the cache, 0 otherwise. */ static int portmap_cache_lookup(hostname, prog, vers, nconf, addrp) char *hostname; rpcprog_t prog; rpcvers_t vers; struct netconfig *nconf; struct netbuf *addrp; { struct portmap_cache *cachep, *prev, *next = NULL, *cp; int retval = 0; timenow = time(NULL); (void) rw_rdlock(&portmap_cache_lock); /* * Increment the portmap cache counters for # accesses and lookups * Use a smaller factor (100 vs 1000 for the host cache) since * initial analysis shows this cache is looked up 10% that of the * host cache. */ #ifdef CACHE_DEBUG portmap_cache_accesses++; portmap_cache_lookups++; if ((portmap_cache_lookups%100) == 0) trace_portmap_cache(); #endif /* CACHE_DEBUG */ for (cachep = portmap_cache_head; cachep; cachep = cachep->cache_next) { if (timenow > cachep->cache_time) { /* * We stumbled across an entry in the cache which * has timed out. Free up all the entries that * were added before it, which will positionally * be after this entry. And adjust neighboring * pointers. * When we drop the lock and re-acquire it, we * need to start from the beginning. */ (void) rw_unlock(&portmap_cache_lock); (void) rw_wrlock(&portmap_cache_lock); for (cp = portmap_cache_head; cp && (cp->cache_time >= timenow); cp = cp->cache_next) ; if (cp == NULL) goto done; /* * Adjust the link of the predecessor. * Make the tail point to the new last entry. */ prev = cp->cache_prev; if (prev == NULL) { portmap_cache_head = NULL; portmap_cache_tail = NULL; } else { prev->cache_next = NULL; portmap_cache_tail = prev; } for (; cp; cp = next) { if (cp->cache_hostname != NULL && cp->cache_hostname != cp->cache_small_hosts) free(cp->cache_hostname); if (cp->cache_proto != NULL && cp->cache_proto != cp->cache_small_proto) free(cp->cache_proto); if (cp->cache_srv_addr.buf != NULL) free(cp->cache_srv_addr.buf); next = cp->cache_next; free(cp); } goto done; } if (cachep->cache_hostname == NULL || prog != cachep->cache_prog || vers != cachep->cache_vers || strcmp(nconf->nc_proto, cachep->cache_proto) != 0 || strcmp(nconf->nc_protofmly, cachep->cache_protofmly) != 0 || strcmp(hostname, cachep->cache_hostname) != 0) continue; /* * Cache Hit. */ #ifdef CACHE_DEBUG portmap_cache_hits++; /* up portmap cache hit counter */ #endif /* CACHE_DEBUG */ addrp->len = cachep->cache_srv_addr.len; memcpy(addrp->buf, cachep->cache_srv_addr.buf, addrp->len); retval = 1; break; } done: (void) rw_unlock(&portmap_cache_lock); return (retval); } static void portmap_cache_enter(hostname, prog, vers, nconf, addrp) char *hostname; rpcprog_t prog; rpcvers_t vers; struct netconfig *nconf; struct netbuf *addrp; { struct portmap_cache *cachep; int protofmlylen; int protolen, hostnamelen; timenow = time(NULL); cachep = malloc(sizeof (struct portmap_cache)); if (cachep == NULL) return; memset((char *)cachep, 0, sizeof (*cachep)); hostnamelen = strlen(hostname); if (hostnamelen <= SMALL_HOSTNAME) cachep->cache_hostname = cachep->cache_small_hosts; else { cachep->cache_hostname = malloc(hostnamelen + 1); if (cachep->cache_hostname == NULL) goto nomem; } strcpy(cachep->cache_hostname, hostname); protolen = strlen(nconf->nc_proto); if (protolen <= SMALL_PROTONAME) cachep->cache_proto = cachep->cache_small_proto; else { cachep->cache_proto = malloc(protolen + 1); if (cachep->cache_proto == NULL) goto nomem; } protofmlylen = strlen(nconf->nc_protofmly); if (protofmlylen <= SMALL_PROTOFMLYNAME) cachep->cache_protofmly = cachep->cache_small_protofmly; else { cachep->cache_protofmly = malloc(protofmlylen + 1); if (cachep->cache_protofmly == NULL) goto nomem; } strcpy(cachep->cache_proto, nconf->nc_proto); cachep->cache_prog = prog; cachep->cache_vers = vers; cachep->cache_time = timenow + portmap_cache_valid_time; cachep->cache_srv_addr.len = addrp->len; cachep->cache_srv_addr.buf = malloc(addrp->len); if (cachep->cache_srv_addr.buf == NULL) goto nomem; memcpy(cachep->cache_srv_addr.buf, addrp->buf, addrp->maxlen); cachep->cache_prev = NULL; (void) rw_wrlock(&portmap_cache_lock); /* * There's a window in which we could have multiple threads making * the same cache entry. This can be avoided by walking the cache * once again here to check and see if there are duplicate entries * (after grabbing the write lock). This isn't fatal and I'm not * going to bother with this. */ #ifdef CACHE_DEBUG portmap_cache_accesses++; /* up portmap cache access counter */ #endif /* CACHE_DEBUG */ cachep->cache_next = portmap_cache_head; if (portmap_cache_head != NULL) portmap_cache_head->cache_prev = cachep; portmap_cache_head = cachep; (void) rw_unlock(&portmap_cache_lock); return; nomem: syslog(LOG_ERR, "portmap_cache_enter: Memory allocation failed"); if (cachep->cache_srv_addr.buf) free(cachep->cache_srv_addr.buf); if (cachep->cache_proto && protolen > SMALL_PROTONAME) free(cachep->cache_proto); if (cachep->cache_hostname && hostnamelen > SMALL_HOSTNAME) free(cachep->cache_hostname); if (cachep->cache_protofmly && protofmlylen > SMALL_PROTOFMLYNAME) free(cachep->cache_protofmly); if (cachep) free(cachep); cachep = NULL; } static int get_cached_srv_addr(char *hostname, rpcprog_t prog, rpcvers_t vers, struct netconfig *nconf, struct netbuf *addrp) { if (portmap_cache_lookup(hostname, prog, vers, nconf, addrp)) return (1); if (rpcb_getaddr(prog, vers, nconf, addrp, hostname) == 0) return (0); portmap_cache_enter(hostname, prog, vers, nconf, addrp); return (1); } /* * Get the network address on "hostname" for program "prog" * with version "vers" by using the nconf configuration data * passed in. * * If the address of a netconfig pointer is null then * information is not sufficient and no netbuf will be returned. * * tinfo argument is for matching the get_the_addr() defined in * ../nfs/mount/mount.c */ void * get_the_stuff( enum type_of_stuff type_of_stuff, char *hostname, rpcprog_t prog, rpcprog_t vers, mfs_snego_t *mfssnego, struct netconfig *nconf, ushort_t port, struct t_info *tinfo, caddr_t *fhp, bool_t direct_to_server, char *fspath, enum clnt_stat *cstat) { struct netbuf *nb = NULL; struct t_bind *tbind = NULL; int fd = -1; enum clnt_stat cs = RPC_TIMEDOUT; CLIENT *cl = NULL; struct timeval tv; AUTH *ah = NULL; AUTH *new_ah = NULL; struct snego_t snego; if (nconf == NULL) { goto done; } if (prog == NFS_PROGRAM && vers == NFS_V4) if (strncasecmp(nconf->nc_proto, NC_UDP, strlen(NC_UDP)) == 0) goto done; if ((fd = t_open(nconf->nc_device, O_RDWR, tinfo)) < 0) { goto done; } /* LINTED pointer alignment */ if ((tbind = (struct t_bind *)t_alloc(fd, T_BIND, T_ADDR)) == NULL) { goto done; } if (direct_to_server == TRUE) { struct nd_hostserv hs; struct nd_addrlist *retaddrs; hs.h_host = hostname; if (trace > 1) trace_prt(1, " get_the_stuff: %s call " "direct to server %s\n", type_of_stuff == SERVER_FH ? "pub fh" : type_of_stuff == SERVER_ADDR ? "get address" : type_of_stuff == SERVER_PING ? "ping" : "unknown", hostname); if (port == 0) hs.h_serv = "nfs"; else hs.h_serv = NULL; if (netdir_getbyname(nconf, &hs, &retaddrs) != ND_OK) { goto done; } memcpy(tbind->addr.buf, retaddrs->n_addrs->buf, retaddrs->n_addrs->len); tbind->addr.len = retaddrs->n_addrs->len; netdir_free((void *)retaddrs, ND_ADDRLIST); if (port) { /* LINTED pointer alignment */ if (strcmp(nconf->nc_protofmly, NC_INET) == NULL) ((struct sockaddr_in *) tbind->addr.buf)->sin_port = htons((ushort_t)port); else if (strcmp(nconf->nc_protofmly, NC_INET6) == NULL) ((struct sockaddr_in6 *) tbind->addr.buf)->sin6_port = htons((ushort_t)port); } if (type_of_stuff == SERVER_FH) { if (netdir_options(nconf, ND_SET_RESERVEDPORT, fd, NULL) == -1) if (trace > 1) trace_prt(1, "\tget_the_stuff: " "ND_SET_RESERVEDPORT(%s) " "failed\n", hostname); } cl = clnt_tli_create(fd, nconf, &tbind->addr, prog, vers, 0, 0); if (trace > 1) trace_prt(1, " get_the_stuff: clnt_tli_create(%s) " "returned %p\n", hostname, cl); if (cl == NULL) goto done; #ifdef MALLOC_DEBUG add_alloc("CLNT_HANDLE", cl, 0, __FILE__, __LINE__); add_alloc("AUTH_HANDLE", cl->cl_auth, 0, __FILE__, __LINE__); #endif switch (type_of_stuff) { case SERVER_FH: { enum snego_stat sec; ah = authsys_create_default(); if (ah != NULL) { #ifdef MALLOC_DEBUG drop_alloc("AUTH_HANDLE", cl->cl_auth, __FILE__, __LINE__); #endif AUTH_DESTROY(cl->cl_auth); cl->cl_auth = ah; #ifdef MALLOC_DEBUG add_alloc("AUTH_HANDLE", cl->cl_auth, 0, __FILE__, __LINE__); #endif } if (!mfssnego->snego_done && vers != NFS_V4) { /* * negotiate sec flavor. */ snego.cnt = 0; if ((sec = nfs_sec_nego(vers, cl, fspath, &snego)) == SNEGO_SUCCESS) { int jj; /* * check if server supports the one * specified in the sec= option. */ if (mfssnego->sec_opt) { for (jj = 0; jj < snego.cnt; jj++) { if (snego.array[jj] == mfssnego->nfs_sec.sc_nfsnum) { mfssnego->snego_done = TRUE; break; } } } /* * find a common sec flavor */ if (!mfssnego->snego_done) { for (jj = 0; jj < snego.cnt; jj++) { if (!nfs_getseconfig_bynumber( snego.array[jj], &mfssnego->nfs_sec)) { mfssnego->snego_done = TRUE; break; } } } if (!mfssnego->snego_done) return (NULL); /* * Now that the flavor has been * negotiated, get the fh. * * First, create an auth handle using the negotiated * sec flavor in the next lookup to * fetch the filehandle. */ new_ah = nfs_create_ah(cl, hostname, &mfssnego->nfs_sec); if (new_ah == NULL) goto done; #ifdef MALLOC_DEBUG drop_alloc("AUTH_HANDLE", cl->cl_auth, __FILE__, __LINE__); #endif AUTH_DESTROY(cl->cl_auth); cl->cl_auth = new_ah; #ifdef MALLOC_DEBUG add_alloc("AUTH_HANDLE", cl->cl_auth, 0, __FILE__, __LINE__); #endif } else if (sec == SNEGO_ARRAY_TOO_SMALL || sec == SNEGO_FAILURE) { goto done; } /* * Note that if sec == SNEGO_DEF_VALID * the default sec flavor is acceptable. * Use it to get the filehandle. */ } } switch (vers) { case NFS_VERSION: { wnl_diropargs arg; wnl_diropres res; memset((char *)&arg.dir, 0, sizeof (wnl_fh)); memset((char *)&res, 0, sizeof (wnl_diropres)); arg.name = fspath; if (wnlproc_lookup_2(&arg, &res, cl) != RPC_SUCCESS || res.status != NFS_OK) goto done; *fhp = malloc(sizeof (wnl_fh)); if (*fhp == NULL) { syslog(LOG_ERR, "no memory\n"); goto done; } memcpy((char *)*fhp, (char *)&res.wnl_diropres_u.wnl_diropres.file, sizeof (wnl_fh)); cs = RPC_SUCCESS; } break; case NFS_V3: { WNL_LOOKUP3args arg; WNL_LOOKUP3res res; nfs_fh3 *fh3p; memset((char *)&arg.what.dir, 0, sizeof (wnl_fh3)); memset((char *)&res, 0, sizeof (WNL_LOOKUP3res)); arg.what.name = fspath; if (wnlproc3_lookup_3(&arg, &res, cl) != RPC_SUCCESS || res.status != NFS3_OK) goto done; fh3p = (nfs_fh3 *)malloc(sizeof (*fh3p)); if (fh3p == NULL) { syslog(LOG_ERR, "no memory\n"); goto done; } fh3p->fh3_length = res. WNL_LOOKUP3res_u.res_ok.object.data.data_len; memcpy(fh3p->fh3_u.data, res. WNL_LOOKUP3res_u.res_ok.object.data.data_val, fh3p->fh3_length); *fhp = (caddr_t)fh3p; cs = RPC_SUCCESS; } break; case NFS_V4: tv.tv_sec = 10; tv.tv_usec = 0; cs = clnt_call(cl, NULLPROC, xdr_void, 0, xdr_void, 0, tv); if (cs != RPC_SUCCESS) goto done; *fhp = strdup(fspath); break; } break; case SERVER_ADDR: case SERVER_PING: tv.tv_sec = 10; tv.tv_usec = 0; cs = clnt_call(cl, NULLPROC, xdr_void, 0, xdr_void, 0, tv); if (trace > 1) trace_prt(1, "get_the_stuff: clnt_call(%s) " "returned %s\n", hostname, cs == RPC_SUCCESS ? "success" : "failure"); if (cs != RPC_SUCCESS) goto done; break; } } else if (type_of_stuff != SERVER_FH) { if (type_of_stuff == SERVER_ADDR) { if (get_cached_srv_addr(hostname, prog, vers, nconf, &tbind->addr) == 0) goto done; } if (port) { /* LINTED pointer alignment */ if (strcmp(nconf->nc_protofmly, NC_INET) == NULL) ((struct sockaddr_in *) tbind->addr.buf)->sin_port = htons((ushort_t)port); else if (strcmp(nconf->nc_protofmly, NC_INET6) == NULL) ((struct sockaddr_in6 *) tbind->addr.buf)->sin6_port = htons((ushort_t)port); cl = clnt_tli_create(fd, nconf, &tbind->addr, prog, vers, 0, 0); if (cl == NULL) goto done; #ifdef MALLOC_DEBUG add_alloc("CLNT_HANDLE", cl, 0, __FILE__, __LINE__); add_alloc("AUTH_HANDLE", cl->cl_auth, 0, __FILE__, __LINE__); #endif tv.tv_sec = 10; tv.tv_usec = 0; cs = clnt_call(cl, NULLPROC, xdr_void, 0, xdr_void, 0, tv); if (cs != RPC_SUCCESS) goto done; } } else { /* can't happen */ goto done; } if (type_of_stuff != SERVER_PING) { cs = RPC_SYSTEMERROR; /* * Make a copy of the netbuf to return */ nb = (struct netbuf *)malloc(sizeof (struct netbuf)); if (nb == NULL) { syslog(LOG_ERR, "no memory\n"); goto done; } *nb = tbind->addr; nb->buf = (char *)malloc(nb->maxlen); if (nb->buf == NULL) { syslog(LOG_ERR, "no memory\n"); free(nb); nb = NULL; goto done; } (void) memcpy(nb->buf, tbind->addr.buf, tbind->addr.len); cs = RPC_SUCCESS; } done: if (cl != NULL) { if (ah != NULL) { #ifdef MALLOC_DEBUG drop_alloc("AUTH_HANDLE", cl->cl_auth, __FILE__, __LINE__); #endif AUTH_DESTROY(cl->cl_auth); cl->cl_auth = NULL; } #ifdef MALLOC_DEBUG drop_alloc("CLNT_HANDLE", cl, __FILE__, __LINE__); #endif clnt_destroy(cl); } if (tbind) { t_free((char *)tbind, T_BIND); tbind = NULL; } if (fd >= 0) (void) t_close(fd); if (cstat != NULL) *cstat = cs; return (nb); } /* * Get a network address on "hostname" for program "prog" * with version "vers". If the port number is specified (non zero) * then try for a TCP/UDP transport and set the port number of the * resulting IP address. * * If the address of a netconfig pointer was passed and * if it's not null, use it as the netconfig otherwise * assign the address of the netconfig that was used to * establish contact with the service. * * tinfo argument is for matching the get_addr() defined in * ../nfs/mount/mount.c */ static struct netbuf * get_addr(char *hostname, rpcprog_t prog, rpcvers_t vers, struct netconfig **nconfp, char *proto, ushort_t port, struct t_info *tinfo) { enum clnt_stat cstat; return (get_server_stuff(SERVER_ADDR, hostname, prog, vers, NULL, nconfp, proto, port, tinfo, NULL, FALSE, NULL, &cstat)); } static struct netbuf * get_pubfh(char *hostname, rpcvers_t vers, mfs_snego_t *mfssnego, struct netconfig **nconfp, char *proto, ushort_t port, struct t_info *tinfo, caddr_t *fhp, bool_t get_pubfh, char *fspath) { enum clnt_stat cstat; return (get_server_stuff(SERVER_FH, hostname, NFS_PROGRAM, vers, mfssnego, nconfp, proto, port, tinfo, fhp, get_pubfh, fspath, &cstat)); } static enum clnt_stat get_ping(char *hostname, rpcprog_t prog, rpcvers_t vers, struct netconfig **nconfp, ushort_t port, bool_t direct_to_server) { enum clnt_stat cstat; (void) get_server_stuff(SERVER_PING, hostname, prog, vers, NULL, nconfp, NULL, port, NULL, NULL, direct_to_server, NULL, &cstat); return (cstat); } void * get_server_stuff( enum type_of_stuff type_of_stuff, char *hostname, rpcprog_t prog, rpcvers_t vers, mfs_snego_t *mfssnego, struct netconfig **nconfp, char *proto, ushort_t port, /* may be zero */ struct t_info *tinfo, caddr_t *fhp, bool_t direct_to_server, char *fspath, enum clnt_stat *cstatp) { struct netbuf *nb = NULL; struct netconfig *nconf = NULL; NCONF_HANDLE *nc = NULL; int nthtry = FIRST_TRY; if (nconfp && *nconfp) return (get_the_stuff(type_of_stuff, hostname, prog, vers, mfssnego, *nconfp, port, tinfo, fhp, direct_to_server, fspath, cstatp)); /* * No nconf passed in. * * Try to get a nconf from /etc/netconfig. * First choice is COTS, second is CLTS unless proto * is specified. When we retry, we reset the * netconfig list, so that we search the whole list * for the next choice. */ if ((nc = setnetpath()) == NULL) goto done; /* * If proto is specified, then only search for the match, * otherwise try COTS first, if failed, then try CLTS. */ if (proto) { while (nconf = getnetpath(nc)) { if (strcmp(nconf->nc_proto, proto)) continue; /* * If the port number is specified then TCP/UDP * is needed. Otherwise any cots/clts will do. */ if (port) { if ((strcmp(nconf->nc_protofmly, NC_INET) && strcmp(nconf->nc_protofmly, NC_INET6)) || (strcmp(nconf->nc_proto, NC_TCP) && strcmp(nconf->nc_proto, NC_UDP))) continue; } nb = get_the_stuff(type_of_stuff, hostname, prog, vers, mfssnego, nconf, port, tinfo, fhp, direct_to_server, fspath, cstatp); if (*cstatp == RPC_SUCCESS) break; assert(nb == NULL); } /* end of while */ if (nconf == NULL) goto done; } else { retry: while (nconf = getnetpath(nc)) { if (nconf->nc_flag & NC_VISIBLE) { if (nthtry == FIRST_TRY) { if ((nconf->nc_semantics == NC_TPI_COTS_ORD) || (nconf->nc_semantics == NC_TPI_COTS)) { if (port == 0) break; if ((strcmp(nconf->nc_protofmly, NC_INET) == 0 || strcmp(nconf->nc_protofmly, NC_INET6) == 0) && (strcmp(nconf->nc_proto, NC_TCP) == 0)) break; } } if (nthtry == SECOND_TRY) { if (nconf->nc_semantics == NC_TPI_CLTS) { if (port == 0) break; if ((strcmp(nconf->nc_protofmly, NC_INET) == 0 || strcmp(nconf->nc_protofmly, NC_INET6) == 0) && (strcmp(nconf->nc_proto, NC_UDP) == 0)) break; } } } } /* while */ if (nconf == NULL) { if (++nthtry <= MNT_PREF_LISTLEN) { endnetpath(nc); if ((nc = setnetpath()) == NULL) goto done; goto retry; } else goto done; } else { nb = get_the_stuff(type_of_stuff, hostname, prog, vers, mfssnego, nconf, port, tinfo, fhp, direct_to_server, fspath, cstatp); if (*cstatp != RPC_SUCCESS) /* * Continue the same search path in the * netconfig db until no more matched nconf * (nconf == NULL). */ goto retry; } } /* if !proto */ /* * Got nconf and nb. Now dup the netconfig structure (nconf) * and return it thru nconfp. */ *nconfp = getnetconfigent(nconf->nc_netid); if (*nconfp == NULL) { syslog(LOG_ERR, "no memory\n"); free(nb); nb = NULL; } done: if (nc) endnetpath(nc); return (nb); } /* * Sends a null call to the remote host's (NFS program, versp). versp * may be "NULL" in which case the default maximum version is used. * Upon return, versp contains the maximum version supported iff versp!= NULL. */ enum clnt_stat pingnfs( char *hostpart, int attempts, rpcvers_t *versp, rpcvers_t versmin, ushort_t port, /* may be zero */ bool_t usepub, char *path, char *proto) { CLIENT *cl = NULL; struct timeval rpc_to_new = {15, 0}; static struct timeval rpc_rtrans_new = {-1, -1}; enum clnt_stat clnt_stat; int i, j; rpcvers_t versmax; /* maximum version to try against server */ rpcvers_t outvers; /* version supported by host on last call */ rpcvers_t vers_to_try; /* to try different versions against host */ char *hostname; struct netconfig *nconf; hostname = strdup(hostpart); if (hostname == NULL) { return (RPC_SYSTEMERROR); } unbracket(&hostname); if (path != NULL && strcmp(hostname, "nfs") == 0 && strncmp(path, "//", 2) == 0) { char *sport; hostname = strdup(path+2); if (hostname == NULL) return (RPC_SYSTEMERROR); path = strchr(hostname, '/'); /* * This cannot happen. If it does, give up * on the ping as this is obviously a corrupt * entry. */ if (path == NULL) { free(hostname); return (RPC_SUCCESS); } /* * Probable end point of host string. */ *path = '\0'; sport = strchr(hostname, ':'); if (sport != NULL && sport < path) { /* * Actual end point of host string. */ *sport = '\0'; port = htons((ushort_t)atoi(sport+1)); } usepub = TRUE; } /* Pick up the default versions and then set them appropriately */ if (versp) { versmax = *versp; /* use versmin passed in */ } else { read_default_nfs(); set_versrange(0, &versmax, &versmin); } if (proto && strncasecmp(proto, NC_UDP, strlen(NC_UDP)) == 0 && versmax == NFS_V4) { if (versmin == NFS_V4) { if (versp) { *versp = versmax - 1; return (RPC_SUCCESS); } return (RPC_PROGUNAVAIL); } else { versmax--; } } if (versp) *versp = versmax; switch (cache_check(hostname, versp, proto)) { case GOODHOST: if (hostname != hostpart) free(hostname); return (RPC_SUCCESS); case DEADHOST: if (hostname != hostpart) free(hostname); return (RPC_TIMEDOUT); case NOHOST: default: break; } /* * XXX The retransmission time rpcbrmttime is a global defined * in the rpc library (rpcb_clnt.c). We use (and like) the default * value of 15 sec in the rpc library. The code below is to protect * us in case it changes. This need not be done under a lock since * any # of threads entering this function will get the same * retransmission value. */ if (rpc_rtrans_new.tv_sec == -1 && rpc_rtrans_new.tv_usec == -1) { __rpc_control(CLCR_GET_RPCB_RMTTIME, (char *)&rpc_rtrans_new); if (rpc_rtrans_new.tv_sec != 15 && rpc_rtrans_new.tv_sec != 0) if (trace > 1) trace_prt(1, "RPC library rttimer changed\n"); } /* * XXX Manipulate the total timeout to get the number of * desired retransmissions. This code is heavily dependant on * the RPC backoff mechanism in clnt_dg_call (clnt_dg.c). */ for (i = 0, j = rpc_rtrans_new.tv_sec; i < attempts-1; i++) { if (j < RPC_MAX_BACKOFF) j *= 2; else j = RPC_MAX_BACKOFF; rpc_to_new.tv_sec += j; } vers_to_try = versmax; /* * check the host's version within the timeout */ if (trace > 1) trace_prt(1, " ping: %s timeout=%ld request vers=%d min=%d\n", hostname, rpc_to_new.tv_sec, versmax, versmin); if (usepub == FALSE) { do { /* * If NFSv4, then we do the same thing as is used * for public filehandles so that we avoid rpcbind */ if (vers_to_try == NFS_V4) { if (trace > 4) { trace_prt(1, " pingnfs: Trying ping via " "\"circuit_v\"\n"); } cl = clnt_create_service_timed(hostname, "nfs", NFS_PROGRAM, vers_to_try, port, "circuit_v", &rpc_to_new); if (cl != NULL) { outvers = vers_to_try; break; } if (trace > 4) { trace_prt(1, " pingnfs: Can't ping via " "\"circuit_v\" %s: RPC error=%d\n", hostname, rpc_createerr.cf_stat); } } else { cl = clnt_create_vers_timed(hostname, NFS_PROGRAM, &outvers, versmin, vers_to_try, "datagram_v", &rpc_to_new); if (cl != NULL) break; if (trace > 4) { trace_prt(1, " pingnfs: Can't ping via " "\"datagram_v\"%s: RPC error=%d\n", hostname, rpc_createerr.cf_stat); } if (rpc_createerr.cf_stat == RPC_UNKNOWNHOST || rpc_createerr.cf_stat == RPC_TIMEDOUT) break; if (rpc_createerr.cf_stat == RPC_PROGNOTREGISTERED) { if (trace > 4) { trace_prt(1, " pingnfs: Trying ping " "via \"circuit_v\"\n"); } cl = clnt_create_vers_timed(hostname, NFS_PROGRAM, &outvers, versmin, vers_to_try, "circuit_v", &rpc_to_new); if (cl != NULL) break; if (trace > 4) { trace_prt(1, " pingnfs: Can't ping " "via \"circuit_v\" %s: " "RPC error=%d\n", hostname, rpc_createerr.cf_stat); } } } /* * backoff and return lower version to retry the ping. * XXX we should be more careful and handle * RPC_PROGVERSMISMATCH here, because that error is handled * in clnt_create_vers(). It's not done to stay in sync * with the nfs mount command. */ vers_to_try--; if (vers_to_try < versmin) break; if (versp != NULL) { /* recheck the cache */ *versp = vers_to_try; if (trace > 4) { trace_prt(1, " pingnfs: check cache: vers=%d\n", *versp); } switch (cache_check(hostname, versp, proto)) { case GOODHOST: if (hostname != hostpart) free(hostname); return (RPC_SUCCESS); case DEADHOST: if (hostname != hostpart) free(hostname); return (RPC_TIMEDOUT); case NOHOST: default: break; } } if (trace > 4) { trace_prt(1, " pingnfs: Try version=%d\n", vers_to_try); } } while (cl == NULL); if (cl == NULL) { if (verbose) syslog(LOG_ERR, "pingnfs: %s%s", hostname, clnt_spcreateerror("")); clnt_stat = rpc_createerr.cf_stat; } else { clnt_destroy(cl); clnt_stat = RPC_SUCCESS; } } else { for (vers_to_try = versmax; vers_to_try >= versmin; vers_to_try--) { nconf = NULL; if (trace > 4) { trace_prt(1, " pingnfs: Try version=%d " "using get_ping()\n", vers_to_try); } clnt_stat = get_ping(hostname, NFS_PROGRAM, vers_to_try, &nconf, port, TRUE); if (nconf != NULL) freenetconfigent(nconf); if (clnt_stat == RPC_SUCCESS) { outvers = vers_to_try; break; } } } if (trace > 1) clnt_stat == RPC_SUCCESS ? trace_prt(1, " pingnfs OK: nfs version=%d\n", outvers): trace_prt(1, " pingnfs FAIL: can't get nfs version\n"); if (clnt_stat == RPC_SUCCESS) { cache_enter(hostname, versmax, outvers, proto, GOODHOST); if (versp != NULL) *versp = outvers; } else cache_enter(hostname, versmax, versmax, proto, DEADHOST); if (hostpart != hostname) free(hostname); return (clnt_stat); } #define MNTTYPE_LOFS "lofs" int loopbackmount(fsname, dir, mntopts, overlay) char *fsname; /* Directory being mounted */ char *dir; /* Directory being mounted on */ char *mntopts; int overlay; { struct mnttab mnt; int flags = 0; char fstype[] = MNTTYPE_LOFS; int dirlen; struct stat st; char optbuf[MAX_MNTOPT_STR]; dirlen = strlen(dir); if (dir[dirlen-1] == ' ') dirlen--; if (dirlen == strlen(fsname) && strncmp(fsname, dir, dirlen) == 0) { syslog(LOG_ERR, "Mount of %s on %s would result in deadlock, aborted\n", fsname, dir); return (RET_ERR); } mnt.mnt_mntopts = mntopts; if (hasmntopt(&mnt, MNTOPT_RO) != NULL) flags |= MS_RDONLY; (void) strlcpy(optbuf, mntopts, sizeof (optbuf)); if (overlay) flags |= MS_OVERLAY; if (trace > 1) trace_prt(1, " loopbackmount: fsname=%s, dir=%s, flags=%d\n", fsname, dir, flags); if (is_system_labeled()) { if (create_homedir((const char *)fsname, (const char *)dir) == 0) { return (NFSERR_NOENT); } } if (mount(fsname, dir, flags | MS_DATA | MS_OPTIONSTR, fstype, NULL, 0, optbuf, sizeof (optbuf)) < 0) { syslog(LOG_ERR, "Mount of %s on %s: %m", fsname, dir); return (RET_ERR); } if (stat(dir, &st) == 0) { if (trace > 1) { trace_prt(1, " loopbackmount of %s on %s dev=%x rdev=%x OK\n", fsname, dir, st.st_dev, st.st_rdev); } } else { if (trace > 1) { trace_prt(1, " loopbackmount of %s on %s OK\n", fsname, dir); trace_prt(1, " stat of %s failed\n", dir); } } return (0); } /* * Look for the value of a numeric option of the form foo=x. If found, set * *valp to the value and return non-zero. If not found or the option is * malformed, return zero. */ int nopt(mnt, opt, valp) struct mnttab *mnt; char *opt; int *valp; /* OUT */ { char *equal; char *str; /* * We should never get a null pointer, but if we do, it's better to * ignore the option than to dump core. */ if (valp == NULL) { syslog(LOG_DEBUG, "null pointer for %s option", opt); return (0); } if (str = hasmntopt(mnt, opt)) { if (equal = strchr(str, '=')) { *valp = atoi(&equal[1]); return (1); } else { syslog(LOG_ERR, "Bad numeric option '%s'", str); } } return (0); } int nfsunmount(mnt) struct mnttab *mnt; { struct timeval timeout; CLIENT *cl; enum clnt_stat rpc_stat; char *host, *path; struct replica *list; int i, count = 0; int isv4mount = is_v4_mount(mnt->mnt_mountp); if (trace > 1) trace_prt(1, " nfsunmount: umount %s\n", mnt->mnt_mountp); if (umount(mnt->mnt_mountp) < 0) { if (trace > 1) trace_prt(1, " nfsunmount: umount %s FAILED\n", mnt->mnt_mountp); if (errno) return (errno); } /* * If this is a NFSv4 mount, the mount protocol was not used * so we just return. */ if (isv4mount) { if (trace > 1) trace_prt(1, " nfsunmount: umount %s OK\n", mnt->mnt_mountp); return (0); } /* * If mounted with -o public, then no need to contact server * because mount protocol was not used. */ if (hasmntopt(mnt, MNTOPT_PUBLIC) != NULL) { return (0); } /* * The rest of this code is advisory to the server. * If it fails return success anyway. */ list = parse_replica(mnt->mnt_special, &count); if (!list) { if (count >= 0) syslog(LOG_ERR, "Memory allocation failed: %m"); return (ENOMEM); } for (i = 0; i < count; i++) { host = list[i].host; path = list[i].path; /* * Skip file systems mounted using WebNFS, because mount * protocol was not used. */ if (strcmp(host, "nfs") == 0 && strncmp(path, "//", 2) == 0) continue; cl = clnt_create(host, MOUNTPROG, MOUNTVERS, "datagram_v"); if (cl == NULL) break; #ifdef MALLOC_DEBUG add_alloc("CLNT_HANDLE", cl, 0, __FILE__, __LINE__); add_alloc("AUTH_HANDLE", cl->cl_auth, 0, __FILE__, __LINE__); #endif if (__clnt_bindresvport(cl) < 0) { if (verbose) syslog(LOG_ERR, "umount %s:%s: %s", host, path, "Couldn't bind to reserved port"); destroy_auth_client_handle(cl); continue; } #ifdef MALLOC_DEBUG drop_alloc("AUTH_HANDLE", cl->cl_auth, __FILE__, __LINE__); #endif AUTH_DESTROY(cl->cl_auth); if ((cl->cl_auth = authsys_create_default()) == NULL) { if (verbose) syslog(LOG_ERR, "umount %s:%s: %s", host, path, "Failed creating default auth handle"); destroy_auth_client_handle(cl); continue; } #ifdef MALLOC_DEBUG add_alloc("AUTH_HANDLE", cl->cl_auth, 0, __FILE__, __LINE__); #endif timeout.tv_usec = 0; timeout.tv_sec = 5; rpc_stat = clnt_call(cl, MOUNTPROC_UMNT, xdr_dirpath, (caddr_t)&path, xdr_void, (char *)NULL, timeout); if (verbose && rpc_stat != RPC_SUCCESS) syslog(LOG_ERR, "%s: %s", host, clnt_sperror(cl, "unmount")); destroy_auth_client_handle(cl); } free_replica(list, count); if (trace > 1) trace_prt(1, " nfsunmount: umount %s OK\n", mnt->mnt_mountp); done: return (0); } /* * Put a new entry in the cache chain by prepending it to the front. * If there isn't enough memory then just give up. */ static void cache_enter(host, reqvers, outvers, proto, state) char *host; rpcvers_t reqvers; rpcvers_t outvers; char *proto; int state; { struct cache_entry *entry; int cache_time = 30; /* sec */ timenow = time(NULL); entry = (struct cache_entry *)malloc(sizeof (struct cache_entry)); if (entry == NULL) return; (void) memset((caddr_t)entry, 0, sizeof (struct cache_entry)); entry->cache_host = strdup(host); if (entry->cache_host == NULL) { cache_free(entry); return; } entry->cache_reqvers = reqvers; entry->cache_outvers = outvers; entry->cache_proto = (proto == NULL ? NULL : strdup(proto)); entry->cache_state = state; entry->cache_time = timenow + cache_time; (void) rw_wrlock(&cache_lock); #ifdef CACHE_DEBUG host_cache_accesses++; /* up host cache access counter */ #endif /* CACHE DEBUG */ entry->cache_next = cache_head; cache_head = entry; (void) rw_unlock(&cache_lock); } static int cache_check(host, versp, proto) char *host; rpcvers_t *versp; char *proto; { int state = NOHOST; struct cache_entry *ce, *prev; timenow = time(NULL); (void) rw_rdlock(&cache_lock); #ifdef CACHE_DEBUG /* Increment the lookup and access counters for the host cache */ host_cache_accesses++; host_cache_lookups++; if ((host_cache_lookups%1000) == 0) trace_host_cache(); #endif /* CACHE DEBUG */ for (ce = cache_head; ce; ce = ce->cache_next) { if (timenow > ce->cache_time) { (void) rw_unlock(&cache_lock); (void) rw_wrlock(&cache_lock); for (prev = NULL, ce = cache_head; ce; prev = ce, ce = ce->cache_next) { if (timenow > ce->cache_time) { cache_free(ce); if (prev) prev->cache_next = NULL; else cache_head = NULL; break; } } (void) rw_unlock(&cache_lock); return (state); } if (strcmp(host, ce->cache_host) != 0) continue; if ((proto == NULL && ce->cache_proto != NULL) || (proto != NULL && ce->cache_proto == NULL)) continue; if (proto != NULL && strcmp(proto, ce->cache_proto) != 0) continue; if (versp == NULL || (versp != NULL && *versp == ce->cache_reqvers) || (versp != NULL && *versp == ce->cache_outvers)) { if (versp != NULL) *versp = ce->cache_outvers; state = ce->cache_state; /* increment the host cache hit counters */ #ifdef CACHE_DEBUG if (state == GOODHOST) goodhost_cache_hits++; if (state == DEADHOST) deadhost_cache_hits++; #endif /* CACHE_DEBUG */ (void) rw_unlock(&cache_lock); return (state); } } (void) rw_unlock(&cache_lock); return (state); } /* * Free a cache entry and all entries * further down the chain since they * will also be expired. */ static void cache_free(entry) struct cache_entry *entry; { struct cache_entry *ce, *next = NULL; for (ce = entry; ce; ce = next) { if (ce->cache_host) free(ce->cache_host); if (ce->cache_proto) free(ce->cache_proto); next = ce->cache_next; free(ce); } } #ifdef MALLOC_DEBUG void cache_flush() { (void) rw_wrlock(&cache_lock); cache_free(cache_head); cache_head = NULL; (void) rw_unlock(&cache_lock); } void flush_caches() { mutex_lock(&cleanup_lock); cond_signal(&cleanup_start_cv); (void) cond_wait(&cleanup_done_cv, &cleanup_lock); mutex_unlock(&cleanup_lock); cache_flush(); portmap_cache_flush(); } #endif /* * Returns 1, if port option is NFS_PORT or * nfsd is running on the port given * Returns 0, if both port is not NFS_PORT and nfsd is not * running on the port. */ static int is_nfs_port(char *opts) { struct mnttab m; uint_t nfs_port = 0; struct servent sv; char buf[256]; int got_port; m.mnt_mntopts = opts; /* * Get port specified in options list, if any. */ got_port = nopt(&m, MNTOPT_PORT, (int *)&nfs_port); /* * if no port specified or it is same as NFS_PORT return nfs * To use any other daemon the port number should be different */ if (!got_port || nfs_port == NFS_PORT) return (1); /* * If daemon is nfsd, return nfs */ if (getservbyport_r(nfs_port, NULL, &sv, buf, 256) == &sv && strcmp(sv.s_name, "nfsd") == 0) return (1); /* * daemon is not nfs */ return (0); } /* * destroy_auth_client_handle(cl) * destroys the created client handle */ void destroy_auth_client_handle(CLIENT *cl) { if (cl) { if (cl->cl_auth) { #ifdef MALLOC_DEBUG drop_alloc("AUTH_HANDLE", cl->cl_auth, __FILE__, __LINE__); #endif AUTH_DESTROY(cl->cl_auth); cl->cl_auth = NULL; } #ifdef MALLOC_DEBUG drop_alloc("CLNT_HANDLE", cl, __FILE__, __LINE__); #endif clnt_destroy(cl); } } /* * Attempt to figure out which version of NFS to use in pingnfs(). If * the version number was specified (i.e., non-zero), then use it. * Otherwise, default to the compiled-in default or the default as set * by the /etc/default/nfs configuration (as read by read_default(). */ int set_versrange(rpcvers_t nfsvers, rpcvers_t *vers, rpcvers_t *versmin) { switch (nfsvers) { case 0: *vers = vers_max_default; *versmin = vers_min_default; break; case NFS_V4: *vers = NFS_V4; *versmin = NFS_V4; break; case NFS_V3: *vers = NFS_V3; *versmin = NFS_V3; break; case NFS_VERSION: *vers = NFS_VERSION; /* version 2 */ *versmin = NFS_VERSMIN; /* version 2 */ break; default: return (-1); } return (0); } #ifdef CACHE_DEBUG /* * trace_portmap_cache() * traces the portmap cache values at desired points */ static void trace_portmap_cache() { syslog(LOG_ERR, "portmap_cache: accesses=%d lookups=%d hits=%d\n", portmap_cache_accesses, portmap_cache_lookups, portmap_cache_hits); } /* * trace_host_cache() * traces the host cache values at desired points */ static void trace_host_cache() { syslog(LOG_ERR, "host_cache: accesses=%d lookups=%d deadhits=%d goodhits=%d\n", host_cache_accesses, host_cache_lookups, deadhost_cache_hits, goodhost_cache_hits); } #endif /* CACHE_DEBUG */ /* * Read the /etc/default/nfs configuration file to determine if the * client has been configured for a new min/max for the NFS version to * use. */ #define NFS_DEFAULT_CHECK 60 /* Seconds to check for nfs default changes */ static void read_default_nfs(void) { static time_t lastread = 0; struct stat buf; char *defval; int errno; int tmp; /* * Fail silently if we can't stat the default nfs config file */ if (stat(NFSADMIN, &buf)) return; if (buf.st_mtime == lastread) return; /* * Fail silently if error in opening the default nfs config file * We'll check back in NFS_DEFAULT_CHECK seconds */ if ((defopen(NFSADMIN)) == 0) { if ((defval = defread("NFS_CLIENT_VERSMIN=")) != NULL) { errno = 0; tmp = strtol(defval, (char **)NULL, 10); if (errno == 0) { vers_min_default = tmp; } } if ((defval = defread("NFS_CLIENT_VERSMAX=")) != NULL) { errno = 0; tmp = strtol(defval, (char **)NULL, 10); if (errno == 0) { vers_max_default = tmp; } } /* close defaults file */ defopen(NULL); lastread = buf.st_mtime; /* * Quick sanity check on the values picked up from the * defaults file. Make sure that a mistake wasn't * made that will confuse things later on. * If so, reset to compiled-in defaults */ if (vers_min_default > vers_max_default || vers_min_default < NFS_VERSMIN || vers_max_default > NFS_VERSMAX) { if (trace > 1) { trace_prt(1, " read_default: version minimum/maximum incorrectly configured\n"); trace_prt(1, " read_default: config is min=%d, max%d. Resetting to min=%d, max%d\n", vers_min_default, vers_max_default, NFS_VERSMIN_DEFAULT, NFS_VERSMAX_DEFAULT); } vers_min_default = NFS_VERSMIN_DEFAULT; vers_max_default = NFS_VERSMAX_DEFAULT; } } } /* * Find the mnttab entry that corresponds to "name". * We're not sure what the name represents: either * a mountpoint name, or a special name (server:/path). * Return the last entry in the file that matches. */ static struct extmnttab * mnttab_find(dirname) char *dirname; { FILE *fp; struct extmnttab mnt; struct extmnttab *res = NULL; fp = fopen(MNTTAB, "r"); if (fp == NULL) { if (trace > 1) trace_prt(1, " mnttab_find: unable to open mnttab\n"); return (NULL); } while (getextmntent(fp, &mnt, sizeof (struct extmnttab)) == 0) { if (strcmp(mnt.mnt_mountp, dirname) == 0 || strcmp(mnt.mnt_special, dirname) == 0) { if (res) fsfreemnttab(res); res = fsdupmnttab(&mnt); } } resetmnttab(fp); fclose(fp); if (res == NULL) { if (trace > 1) trace_prt(1, " mnttab_find: unable to find %s\n", dirname); } return (res); } /* * This function's behavior is taken from nfsstat. * Trying to determine what NFS version was used for the mount. */ static int is_v4_mount(char *mntpath) { kstat_ctl_t *kc = NULL; /* libkstat cookie */ kstat_t *ksp; ulong_t fsid; struct mntinfo_kstat mik; struct extmnttab *mntp; uint_t mnt_minor; if ((mntp = mnttab_find(mntpath)) == NULL) return (FALSE); /* save the minor number and free the struct so we don't forget */ mnt_minor = mntp->mnt_minor; fsfreemnttab(mntp); if ((kc = kstat_open()) == NULL) return (FALSE); for (ksp = kc->kc_chain; ksp; ksp = ksp->ks_next) { if (ksp->ks_type != KSTAT_TYPE_RAW) continue; if (strcmp(ksp->ks_module, "nfs") != 0) continue; if (strcmp(ksp->ks_name, "mntinfo") != 0) continue; if (mnt_minor != ksp->ks_instance) continue; if (kstat_read(kc, ksp, &mik) == -1) continue; (void) kstat_close(kc); if (mik.mik_vers == 4) return (TRUE); else return (FALSE); } (void) kstat_close(kc); return (FALSE); } static int create_homedir(const char *src, const char *dst) { struct stat stbuf; char *dst_username; struct passwd *pwd, pwds; char buf_pwd[NSS_BUFLEN_PASSWD]; int homedir_len; int dst_dir_len; int src_dir_len; if (trace > 1) trace_prt(1, "entered create_homedir\n"); if (stat(src, &stbuf) == 0) { if (trace > 1) trace_prt(1, "src exists\n"); return (1); } dst_username = strrchr(dst, '/'); if (dst_username) { dst_username++; /* Skip over slash */ pwd = getpwnam_r(dst_username, &pwds, buf_pwd, sizeof (buf_pwd)); if (pwd == NULL) { return (0); } } else { return (0); } homedir_len = strlen(pwd->pw_dir); dst_dir_len = strlen(dst) - homedir_len; src_dir_len = strlen(src) - homedir_len; /* Check that the paths are in the same zone */ if (src_dir_len < dst_dir_len || (strncmp(dst, src, dst_dir_len) != 0)) { if (trace > 1) trace_prt(1, " paths don't match\n"); return (0); } /* Check that mountpoint is an auto_home entry */ if (dst_dir_len < 0 || (strcmp(pwd->pw_dir, dst + dst_dir_len) != 0)) { return (0); } /* Check that source is an home directory entry */ if (src_dir_len < 0 || (strcmp(pwd->pw_dir, src + src_dir_len) != 0)) { if (trace > 1) trace_prt(1, " homedir (2) doesn't match %s\n", src+src_dir_len); return (0); } if (mkdir(src, S_IRUSR | S_IWUSR | S_IXUSR | S_IXGRP | S_IXOTH) == -1) { if (trace > 1) { trace_prt(1, " Couldn't mkdir %s\n", src); } return (0); } if (chown(src, pwd->pw_uid, pwd->pw_gid) == -1) { unlink(src); return (0); } /* Created new home directory for the user */ return (1); } void free_nfs_args(struct nfs_args *argp) { struct nfs_args *oldp; while (argp) { if (argp->pathconf) free(argp->pathconf); if (argp->knconf) free_knconf(argp->knconf); if (argp->addr) netbuf_free(argp->addr); if (argp->syncaddr) netbuf_free(argp->syncaddr); if (argp->netname) free(argp->netname); if (argp->hostname) free(argp->hostname); if (argp->nfs_ext_u.nfs_extB.secdata) nfs_free_secdata(argp->nfs_ext_u.nfs_extB.secdata); if (argp->fh) free(argp->fh); if (argp->nfs_ext_u.nfs_extA.secdata) { sec_data_t *sd; sd = argp->nfs_ext_u.nfs_extA.secdata; if (sd == NULL) break; switch (sd->rpcflavor) { case AUTH_NONE: case AUTH_UNIX: case AUTH_LOOPBACK: break; case AUTH_DES: { dh_k4_clntdata_t *dhk4; dhk4 = (dh_k4_clntdata_t *)sd->data; if (dhk4 == NULL) break; if (dhk4->syncaddr.buf) free(dhk4->syncaddr.buf); if (dhk4->knconf->knc_protofmly) free(dhk4->knconf->knc_protofmly); if (dhk4->knconf->knc_proto) free(dhk4->knconf->knc_proto); if (dhk4->knconf) free(dhk4->knconf); if (dhk4->netname) free(dhk4->netname); free(dhk4); break; } case RPCSEC_GSS: { gss_clntdata_t *gss; gss = (gss_clntdata_t *)sd->data; if (gss == NULL) break; if (gss->mechanism.elements) free(gss->mechanism.elements); free(gss); break; } } } oldp = argp; if (argp->nfs_args_ext == NFS_ARGS_EXTB) argp = argp->nfs_ext_u.nfs_extB.next; else argp = NULL; free(oldp); } }