/* * NFS mount the kernel directory, and perform a lookup on the * kernel file. * * Places the directory filehandle in global "dirfh" * Places the kernel filehandle in global filefh * * returns 0 on success, nonzero on failure */ int fileinit(struct in_addr ip, char *dirname, char *filename) { int mount_port; char *readahead_option; int err; readahead_option = getenv("readahead"); if (readahead_option) kimg_readahead = atoi(readahead_option); if (kimg_readahead < 0) dprintf("NFS using whole-file readahead\n"); else if (kimg_readahead > 0) dprintf("NFS using %dkb readahead\n", kimg_readahead); rpc_init(); /* * Lookup NFS/MOUNTD ports for ROOT using PORTMAP. */ nfs_port = rpc_lookup(ip, PROG_NFS, 2); mount_port = rpc_lookup(ip, PROG_MOUNT, 1); if (nfs_port == -1 || mount_port == -1) { printf("Can't get root NFS/MOUNT ports.\n"); return 1; } dprintf("fileinit: NFS port = %d, MOUNT port = %d\n", nfs_port, mount_port); /* * NFS mount the directory. */ dprintf("Mounting %s ... ", dirname); err = nfs_mount(ip, mount_port, dirname, dirfh); if (err) { printf("Can't mount filesystem: %s.\n", nfs_strerror(err)); return 1; } dprintf("done\n"); /* * Lookup the file. */ dprintf("Looking up %s ... ", filename); err = nfs_lookup(ip, nfs_port, dirfh, filename, filefh); if (err) { printf("Can't lookup %s: %s.\n", filename, nfs_strerror(err)); return 1; } dprintf("done\n"); /* Stash ipaddr for subsequent calls */ ipaddr.s_addr = ip.s_addr; return 0; }
static void expand_format_string(int error, const char *fmt, char *buf, int buf_chars) { const char *from; /* pointer into fmt */ char *to; /* pointer into buf */ char *errmsg; /* expansion for %m */ char *trunc_msg = "Truncated NFS error message: "; zoneid_t zoneid = getzoneid(); /* * Copy the given format string into the result buffer, expanding * %m as we go. If the result buffer is too short, complain and * truncate the message. (We don't expect this to ever happen, * though.) */ for (from = fmt, to = buf; *from; from++) { if (to >= buf + buf_chars - 1) { zprintf(zoneid, trunc_msg); break; } if (*from == '%' && *(from+1) == 'm') { errmsg = nfs_strerror(error); /* * If there's an error message and room to display * it, copy it in. If there's no message or not * enough room, try just printing an error number. * (We assume that the error value is in a * reasonable range.) If there's no room for * anything, bail out. */ if (errmsg != NULL && strlen(buf) + strlen(errmsg) < buf_chars) { (void) strcpy(to, errmsg); to += strlen(errmsg); } else if (strlen(buf) + strlen("error XXX") < buf_chars) { (void) sprintf(to, "error %d", error); /* * Don't try to guess how many characters * were laid down. */ to = buf + strlen(buf); } else { zprintf(zoneid, trunc_msg); break; } from++; } else { *to++ = *from; } } *to = '\0'; }
/* * Read a small block of data from the input file. */ int fileread(oskit_addr_t file_ofs, void *buf, oskit_size_t size, oskit_size_t *out_actual) { int n, bytes_read; int offset; char *bufp = buf; int chunk_size; int readahead; #ifdef CYCLECOUNTS unsigned long long before_cycles; #endif bytes_read = 0; offset = file_ofs; while (size > 0) { chunk_size = min(NFS_READ_SIZE, size); if (kimg_readahead < 0) readahead = (size / NFS_READ_SIZE) - 1; else readahead = kimg_readahead; GETCSTAMP(before_cycles); n = nfs_read(ipaddr, nfs_port, filefh, offset, chunk_size, bufp, readahead); UPDATECSTAMP(total_readwait_cycles, before_cycles); if (n < 0) { printf("Unable to read text: %s\n", nfs_strerror(n)); return 1; /* XXX Should be an EX_ constant */ } if (n == 0) break; /* hit eof */ offset += n; bufp += n; size -= n; bytes_read += n; } *out_actual = bytes_read; return 0; }
// NB: mp->xxx fields may be trashed on exit static int nfsmount(struct mntent *mp, int vfsflags, char *filteropts) { CLIENT *mclient; char *hostname; char *pathname; char *mounthost; struct nfs_mount_data data; char *opt; struct hostent *hp; struct sockaddr_in server_addr; struct sockaddr_in mount_server_addr; int msock, fsock; union { struct fhstatus nfsv2; struct mountres3 nfsv3; } status; int daemonized; char *s; int port; int mountport; int proto; int bg; int soft; int intr; int posix; int nocto; int noac; int nolock; int retry; int tcp; int mountprog; int mountvers; int nfsprog; int nfsvers; int retval; find_kernel_nfs_mount_version(); daemonized = 0; mounthost = NULL; retval = ETIMEDOUT; msock = fsock = -1; mclient = NULL; /* NB: hostname, mounthost, filteropts must be free()d prior to return */ filteropts = xstrdup(filteropts); /* going to trash it later... */ hostname = xstrdup(mp->mnt_fsname); /* mount_main() guarantees that ':' is there */ s = strchr(hostname, ':'); pathname = s + 1; *s = '\0'; /* Ignore all but first hostname in replicated mounts until they can be fully supported. ([email protected]) */ s = strchr(hostname, ','); if (s) { *s = '\0'; bb_error_msg("warning: multiple hostnames not supported"); } server_addr.sin_family = AF_INET; if (!inet_aton(hostname, &server_addr.sin_addr)) { hp = gethostbyname(hostname); if (hp == NULL) { bb_herror_msg("%s", hostname); goto fail; } if (hp->h_length > sizeof(struct in_addr)) { bb_error_msg("got bad hp->h_length"); hp->h_length = sizeof(struct in_addr); } memcpy(&server_addr.sin_addr, hp->h_addr, hp->h_length); } memcpy(&mount_server_addr, &server_addr, sizeof(mount_server_addr)); /* add IP address to mtab options for use when unmounting */ if (!mp->mnt_opts) { /* TODO: actually mp->mnt_opts is never NULL */ mp->mnt_opts = xasprintf("addr=%s", inet_ntoa(server_addr.sin_addr)); } else { char *tmp = xasprintf("%s%saddr=%s", mp->mnt_opts, mp->mnt_opts[0] ? "," : "", inet_ntoa(server_addr.sin_addr)); free(mp->mnt_opts); mp->mnt_opts = tmp; } /* Set default options. * rsize/wsize (and bsize, for ver >= 3) are left 0 in order to * let the kernel decide. * timeo is filled in after we know whether it'll be TCP or UDP. */ memset(&data, 0, sizeof(data)); data.retrans = 3; data.acregmin = 3; data.acregmax = 60; data.acdirmin = 30; data.acdirmax = 60; data.namlen = NAME_MAX; bg = 0; soft = 0; intr = 0; posix = 0; nocto = 0; nolock = 0; noac = 0; retry = 10000; /* 10000 minutes ~ 1 week */ tcp = 0; mountprog = MOUNTPROG; mountvers = 0; port = 0; mountport = 0; nfsprog = 100003; nfsvers = 0; /* parse options */ if (filteropts) for (opt = strtok(filteropts, ","); opt; opt = strtok(NULL, ",")) { char *opteq = strchr(opt, '='); if (opteq) { static const char *const options[] = { /* 0 */ "rsize", /* 1 */ "wsize", /* 2 */ "timeo", /* 3 */ "retrans", /* 4 */ "acregmin", /* 5 */ "acregmax", /* 6 */ "acdirmin", /* 7 */ "acdirmax", /* 8 */ "actimeo", /* 9 */ "retry", /* 10 */ "port", /* 11 */ "mountport", /* 12 */ "mounthost", /* 13 */ "mountprog", /* 14 */ "mountvers", /* 15 */ "nfsprog", /* 16 */ "nfsvers", /* 17 */ "vers", /* 18 */ "proto", /* 19 */ "namlen", /* 20 */ "addr", NULL }; int val = xatoi_u(opteq + 1); *opteq = '\0'; switch (index_in_str_array(options, opt)) { case 0: // "rsize" data.rsize = val; break; case 1: // "wsize" data.wsize = val; break; case 2: // "timeo" data.timeo = val; break; case 3: // "retrans" data.retrans = val; break; case 4: // "acregmin" data.acregmin = val; break; case 5: // "acregmax" data.acregmax = val; break; case 6: // "acdirmin" data.acdirmin = val; break; case 7: // "acdirmax" data.acdirmax = val; break; case 8: // "actimeo" data.acregmin = val; data.acregmax = val; data.acdirmin = val; data.acdirmax = val; break; case 9: // "retry" retry = val; break; case 10: // "port" port = val; break; case 11: // "mountport" mountport = val; break; case 12: // "mounthost" mounthost = xstrndup(opteq+1, strcspn(opteq+1," \t\n\r,")); break; case 13: // "mountprog" mountprog = val; break; case 14: // "mountvers" mountvers = val; break; case 15: // "nfsprog" nfsprog = val; break; case 16: // "nfsvers" case 17: // "vers" nfsvers = val; break; case 18: // "proto" if (!strncmp(opteq+1, "tcp", 3)) tcp = 1; else if (!strncmp(opteq+1, "udp", 3)) tcp = 0; else bb_error_msg("warning: unrecognized proto= option"); break; case 19: // "namlen" if (nfs_mount_version >= 2) data.namlen = val; else bb_error_msg("warning: option namlen is not supported\n"); break; case 20: // "addr" - ignore break; default: bb_error_msg("unknown nfs mount parameter: %s=%d", opt, val); goto fail; } } else { static const char *const options[] = { "bg", "fg", "soft", "hard", "intr", "posix", "cto", "ac", "tcp", "udp", "lock", NULL }; int val = 1; if (!strncmp(opt, "no", 2)) { val = 0; opt += 2; } switch (index_in_str_array(options, opt)) { case 0: // "bg" bg = val; break; case 1: // "fg" bg = !val; break; case 2: // "soft" soft = val; break; case 3: // "hard" soft = !val; break; case 4: // "intr" intr = val; break; case 5: // "posix" posix = val; break; case 6: // "cto" nocto = !val; break; case 7: // "ac" noac = !val; break; case 8: // "tcp" tcp = val; break; case 9: // "udp" tcp = !val; break; case 10: // "lock" if (nfs_mount_version >= 3) nolock = !val; else bb_error_msg("warning: option nolock is not supported"); break; default: bb_error_msg("unknown nfs mount option: %s%s", val ? "" : "no", opt); goto fail; } } } proto = (tcp) ? IPPROTO_TCP : IPPROTO_UDP; data.flags = (soft ? NFS_MOUNT_SOFT : 0) | (intr ? NFS_MOUNT_INTR : 0) | (posix ? NFS_MOUNT_POSIX : 0) | (nocto ? NFS_MOUNT_NOCTO : 0) | (noac ? NFS_MOUNT_NOAC : 0); if (nfs_mount_version >= 2) data.flags |= (tcp ? NFS_MOUNT_TCP : 0); if (nfs_mount_version >= 3) data.flags |= (nolock ? NFS_MOUNT_NONLM : 0); if (nfsvers > MAX_NFSPROT || mountvers > MAX_NFSPROT) { bb_error_msg("NFSv%d not supported", nfsvers); goto fail; } if (nfsvers && !mountvers) mountvers = (nfsvers < 3) ? 1 : nfsvers; if (nfsvers && nfsvers < mountvers) { mountvers = nfsvers; } /* Adjust options if none specified */ if (!data.timeo) data.timeo = tcp ? 70 : 7; data.version = nfs_mount_version; if (vfsflags & MS_REMOUNT) goto do_mount; /* * If the previous mount operation on the same host was * backgrounded, and the "bg" for this mount is also set, * give up immediately, to avoid the initial timeout. */ if (bg && we_saw_this_host_before(hostname)) { daemonized = daemonize(); /* parent or error */ if (daemonized <= 0) { /* parent or error */ retval = -daemonized; goto ret; } } /* create mount daemon client */ /* See if the nfs host = mount host. */ if (mounthost) { if (mounthost[0] >= '0' && mounthost[0] <= '9') { mount_server_addr.sin_family = AF_INET; mount_server_addr.sin_addr.s_addr = inet_addr(hostname); } else { hp = gethostbyname(mounthost); if (hp == NULL) { bb_herror_msg("%s", mounthost); goto fail; } else { if (hp->h_length > sizeof(struct in_addr)) { bb_error_msg("got bad hp->h_length?"); hp->h_length = sizeof(struct in_addr); } mount_server_addr.sin_family = AF_INET; memcpy(&mount_server_addr.sin_addr, hp->h_addr, hp->h_length); } } } /* * The following loop implements the mount retries. When the mount * times out, and the "bg" option is set, we background ourself * and continue trying. * * The case where the mount point is not present and the "bg" * option is set, is treated as a timeout. This is done to * support nested mounts. * * The "retry" count specified by the user is the number of * minutes to retry before giving up. */ { struct timeval total_timeout; struct timeval retry_timeout; struct pmap* pm_mnt; time_t t; time_t prevt; time_t timeout; retry_timeout.tv_sec = 3; retry_timeout.tv_usec = 0; total_timeout.tv_sec = 20; total_timeout.tv_usec = 0; timeout = time(NULL) + 60 * retry; prevt = 0; t = 30; retry: /* be careful not to use too many CPU cycles */ if (t - prevt < 30) sleep(30); pm_mnt = get_mountport(&mount_server_addr, mountprog, mountvers, proto, mountport); nfsvers = (pm_mnt->pm_vers < 2) ? 2 : pm_mnt->pm_vers; /* contact the mount daemon via TCP */ mount_server_addr.sin_port = htons(pm_mnt->pm_port); msock = RPC_ANYSOCK; switch (pm_mnt->pm_prot) { case IPPROTO_UDP: mclient = clntudp_create(&mount_server_addr, pm_mnt->pm_prog, pm_mnt->pm_vers, retry_timeout, &msock); if (mclient) break; mount_server_addr.sin_port = htons(pm_mnt->pm_port); msock = RPC_ANYSOCK; case IPPROTO_TCP: mclient = clnttcp_create(&mount_server_addr, pm_mnt->pm_prog, pm_mnt->pm_vers, &msock, 0, 0); break; default: mclient = 0; } if (!mclient) { if (!daemonized && prevt == 0) error_msg_rpc(clnt_spcreateerror(" ")); } else { enum clnt_stat clnt_stat; /* try to mount hostname:pathname */ mclient->cl_auth = authunix_create_default(); /* make pointers in xdr_mountres3 NULL so * that xdr_array allocates memory for us */ memset(&status, 0, sizeof(status)); if (pm_mnt->pm_vers == 3) clnt_stat = clnt_call(mclient, MOUNTPROC3_MNT, (xdrproc_t) xdr_dirpath, (caddr_t) &pathname, (xdrproc_t) xdr_mountres3, (caddr_t) &status, total_timeout); else clnt_stat = clnt_call(mclient, MOUNTPROC_MNT, (xdrproc_t) xdr_dirpath, (caddr_t) &pathname, (xdrproc_t) xdr_fhstatus, (caddr_t) &status, total_timeout); if (clnt_stat == RPC_SUCCESS) goto prepare_kernel_data; /* we're done */ if (errno != ECONNREFUSED) { error_msg_rpc(clnt_sperror(mclient, " ")); goto fail; /* don't retry */ } /* Connection refused */ if (!daemonized && prevt == 0) /* print just once */ error_msg_rpc(clnt_sperror(mclient, " ")); auth_destroy(mclient->cl_auth); clnt_destroy(mclient); mclient = 0; close(msock); } /* Timeout. We are going to retry... maybe */ if (!bg) goto fail; if (!daemonized) { daemonized = daemonize(); if (daemonized <= 0) { /* parent or error */ retval = -daemonized; goto ret; } } prevt = t; t = time(NULL); if (t >= timeout) /* TODO error message */ goto fail; goto retry; } prepare_kernel_data: if (nfsvers == 2) { if (status.nfsv2.fhs_status != 0) { bb_error_msg("%s:%s failed, reason given by server: %s", hostname, pathname, nfs_strerror(status.nfsv2.fhs_status)); goto fail; } memcpy(data.root.data, (char *) status.nfsv2.fhstatus_u.fhs_fhandle, NFS_FHSIZE); data.root.size = NFS_FHSIZE; memcpy(data.old_root.data, (char *) status.nfsv2.fhstatus_u.fhs_fhandle, NFS_FHSIZE); } else { fhandle3 *my_fhandle; if (status.nfsv3.fhs_status != 0) { bb_error_msg("%s:%s failed, reason given by server: %s", hostname, pathname, nfs_strerror(status.nfsv3.fhs_status)); goto fail; } my_fhandle = &status.nfsv3.mountres3_u.mountinfo.fhandle; memset(data.old_root.data, 0, NFS_FHSIZE); memset(&data.root, 0, sizeof(data.root)); data.root.size = my_fhandle->fhandle3_len; memcpy(data.root.data, (char *) my_fhandle->fhandle3_val, my_fhandle->fhandle3_len); data.flags |= NFS_MOUNT_VER3; } /* create nfs socket for kernel */ if (tcp) { if (nfs_mount_version < 3) { bb_error_msg("NFS over TCP is not supported"); goto fail; } fsock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); } else fsock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP); if (fsock < 0) { bb_perror_msg("nfs socket"); goto fail; } if (bindresvport(fsock, 0) < 0) { bb_perror_msg("nfs bindresvport"); goto fail; } if (port == 0) { server_addr.sin_port = PMAPPORT; port = pmap_getport(&server_addr, nfsprog, nfsvers, tcp ? IPPROTO_TCP : IPPROTO_UDP); if (port == 0) port = NFS_PORT; } server_addr.sin_port = htons(port); /* prepare data structure for kernel */ data.fd = fsock; memcpy((char *) &data.addr, (char *) &server_addr, sizeof(data.addr)); strncpy(data.hostname, hostname, sizeof(data.hostname)); /* clean up */ auth_destroy(mclient->cl_auth); clnt_destroy(mclient); close(msock); if (bg) { /* We must wait until mount directory is available */ struct stat statbuf; int delay = 1; while (stat(mp->mnt_dir, &statbuf) == -1) { if (!daemonized) { daemonized = daemonize(); if (daemonized <= 0) { /* parent or error */ retval = -daemonized; goto ret; } } sleep(delay); /* 1, 2, 4, 8, 16, 30, ... */ delay *= 2; if (delay > 30) delay = 30; } } do_mount: /* perform actual mount */ mp->mnt_type = (char*)"nfs"; retval = mount_it_now(mp, vfsflags, (char*)&data); goto ret; fail: /* abort */ if (msock != -1) { if (mclient) { auth_destroy(mclient->cl_auth); clnt_destroy(mclient); } close(msock); } if (fsock != -1) close(fsock); ret: free(hostname); free(mounthost); free(filteropts); return retval; }
int nfsmount(const char *spec, const char *node, int *flags, char **extra_opts, char **mount_opts, int running_bg) { static char *prev_bg_host; char hostdir[1024]; CLIENT *mclient; char *hostname; char *pathname; char *old_opts; char *mounthost=NULL; char new_opts[1024]; struct timeval total_timeout; enum clnt_stat clnt_stat; static struct nfs_mount_data data; char *opt, *opteq; int val; struct hostent *hp; struct sockaddr_in server_addr; struct sockaddr_in mount_server_addr; struct pmap* pm_mnt; int msock, fsock; struct timeval retry_timeout; union { struct fhstatus nfsv2; struct mountres3 nfsv3; } status; struct stat statbuf; char *s; int port; int mountport; int proto; int bg; int soft; int intr; int posix; int nocto; int noac; int nolock; int retry; int tcp; int mountprog; int mountvers; int nfsprog; int nfsvers; int retval; time_t t; time_t prevt; time_t timeout; find_kernel_nfs_mount_version(); retval = EX_FAIL; msock = fsock = -1; mclient = NULL; if (strlen(spec) >= sizeof(hostdir)) { bb_error_msg("excessively long host:dir argument"); goto fail; } strcpy(hostdir, spec); if ((s = strchr(hostdir, ':'))) { hostname = hostdir; pathname = s + 1; *s = '\0'; /* Ignore all but first hostname in replicated mounts until they can be fully supported. ([email protected]) */ if ((s = strchr(hostdir, ','))) { *s = '\0'; bb_error_msg("warning: multiple hostnames not supported"); } } else { bb_error_msg("directory to mount not in host:dir format"); goto fail; } server_addr.sin_family = AF_INET; #ifdef HAVE_inet_aton if (!inet_aton(hostname, &server_addr.sin_addr)) #endif { if ((hp = gethostbyname(hostname)) == NULL) { bb_herror_msg("%s", hostname); goto fail; } else { if (hp->h_length > sizeof(struct in_addr)) { bb_error_msg("got bad hp->h_length"); hp->h_length = sizeof(struct in_addr); } memcpy(&server_addr.sin_addr, hp->h_addr, hp->h_length); } } memcpy (&mount_server_addr, &server_addr, sizeof (mount_server_addr)); /* add IP address to mtab options for use when unmounting */ s = inet_ntoa(server_addr.sin_addr); old_opts = *extra_opts; if (!old_opts) old_opts = ""; if (strlen(old_opts) + strlen(s) + 10 >= sizeof(new_opts)) { bb_error_msg("excessively long option argument"); goto fail; } sprintf(new_opts, "%s%saddr=%s", old_opts, *old_opts ? "," : "", s); *extra_opts = bb_xstrdup(new_opts); /* Set default options. * rsize/wsize (and bsize, for ver >= 3) are left 0 in order to * let the kernel decide. * timeo is filled in after we know whether it'll be TCP or UDP. */ memset(&data, 0, sizeof(data)); data.retrans = 3; data.acregmin = 3; data.acregmax = 60; data.acdirmin = 30; data.acdirmax = 60; #if NFS_MOUNT_VERSION >= 2 data.namlen = NAME_MAX; #endif bg = 0; soft = 0; intr = 0; posix = 0; nocto = 0; nolock = 0; noac = 0; retry = 10000; /* 10000 minutes ~ 1 week */ tcp = 0; mountprog = MOUNTPROG; mountvers = 0; port = 0; mountport = 0; nfsprog = NFS_PROGRAM; nfsvers = 0; /* parse options */ for (opt = strtok(old_opts, ","); opt; opt = strtok(NULL, ",")) { if ((opteq = strchr(opt, '='))) { val = atoi(opteq + 1); *opteq = '\0'; if (!strcmp(opt, "rsize")) data.rsize = val; else if (!strcmp(opt, "wsize")) data.wsize = val; else if (!strcmp(opt, "timeo")) data.timeo = val; else if (!strcmp(opt, "retrans")) data.retrans = val; else if (!strcmp(opt, "acregmin")) data.acregmin = val; else if (!strcmp(opt, "acregmax")) data.acregmax = val; else if (!strcmp(opt, "acdirmin")) data.acdirmin = val; else if (!strcmp(opt, "acdirmax")) data.acdirmax = val; else if (!strcmp(opt, "actimeo")) { data.acregmin = val; data.acregmax = val; data.acdirmin = val; data.acdirmax = val; } else if (!strcmp(opt, "retry")) retry = val; else if (!strcmp(opt, "port")) port = val; else if (!strcmp(opt, "mountport")) mountport = val; else if (!strcmp(opt, "mounthost")) mounthost=bb_xstrndup(opteq+1, strcspn(opteq+1," \t\n\r,")); else if (!strcmp(opt, "mountprog")) mountprog = val; else if (!strcmp(opt, "mountvers")) mountvers = val; else if (!strcmp(opt, "nfsprog")) nfsprog = val; else if (!strcmp(opt, "nfsvers") || !strcmp(opt, "vers")) nfsvers = val; else if (!strcmp(opt, "proto")) { if (!strncmp(opteq+1, "tcp", 3)) tcp = 1; else if (!strncmp(opteq+1, "udp", 3)) tcp = 0; else printf(_("Warning: Unrecognized proto= option.\n")); } else if (!strcmp(opt, "namlen")) { #if NFS_MOUNT_VERSION >= 2 if (nfs_mount_version >= 2) data.namlen = val; else #endif printf(_("Warning: Option namlen is not supported.\n")); } else if (!strcmp(opt, "addr")) /* ignore */; else { printf(_("unknown nfs mount parameter: " "%s=%d\n"), opt, val); goto fail; } } else { val = 1; if (!strncmp(opt, "no", 2)) { val = 0; opt += 2; } if (!strcmp(opt, "bg")) bg = val; else if (!strcmp(opt, "fg")) bg = !val; else if (!strcmp(opt, "soft")) soft = val; else if (!strcmp(opt, "hard")) soft = !val; else if (!strcmp(opt, "intr")) intr = val; else if (!strcmp(opt, "posix")) posix = val; else if (!strcmp(opt, "cto")) nocto = !val; else if (!strcmp(opt, "ac")) noac = !val; else if (!strcmp(opt, "tcp")) tcp = val; else if (!strcmp(opt, "udp")) tcp = !val; else if (!strcmp(opt, "lock")) { if (nfs_mount_version >= 3) nolock = !val; else printf(_("Warning: option nolock is not supported.\n")); } else { printf(_("unknown nfs mount option: " "%s%s\n"), val ? "" : "no", opt); goto fail; } } } proto = (tcp) ? IPPROTO_TCP : IPPROTO_UDP; data.flags = (soft ? NFS_MOUNT_SOFT : 0) | (intr ? NFS_MOUNT_INTR : 0) | (posix ? NFS_MOUNT_POSIX : 0) | (nocto ? NFS_MOUNT_NOCTO : 0) | (noac ? NFS_MOUNT_NOAC : 0); #if NFS_MOUNT_VERSION >= 2 if (nfs_mount_version >= 2) data.flags |= (tcp ? NFS_MOUNT_TCP : 0); #endif #if NFS_MOUNT_VERSION >= 3 if (nfs_mount_version >= 3) data.flags |= (nolock ? NFS_MOUNT_NONLM : 0); #endif if (nfsvers > MAX_NFSPROT) { bb_error_msg("NFSv%d not supported!", nfsvers); return 0; } if (mountvers > MAX_NFSPROT) { bb_error_msg("NFSv%d not supported!", nfsvers); return 0; } if (nfsvers && !mountvers) mountvers = (nfsvers < 3) ? 1 : nfsvers; if (nfsvers && nfsvers < mountvers) { mountvers = nfsvers; } /* Adjust options if none specified */ if (!data.timeo) data.timeo = tcp ? 70 : 7; #ifdef NFS_MOUNT_DEBUG printf("rsize = %d, wsize = %d, timeo = %d, retrans = %d\n", data.rsize, data.wsize, data.timeo, data.retrans); printf("acreg (min, max) = (%d, %d), acdir (min, max) = (%d, %d)\n", data.acregmin, data.acregmax, data.acdirmin, data.acdirmax); printf("port = %d, bg = %d, retry = %d, flags = %.8x\n", port, bg, retry, data.flags); printf("mountprog = %d, mountvers = %d, nfsprog = %d, nfsvers = %d\n", mountprog, mountvers, nfsprog, nfsvers); printf("soft = %d, intr = %d, posix = %d, nocto = %d, noac = %d\n", (data.flags & NFS_MOUNT_SOFT) != 0, (data.flags & NFS_MOUNT_INTR) != 0, (data.flags & NFS_MOUNT_POSIX) != 0, (data.flags & NFS_MOUNT_NOCTO) != 0, (data.flags & NFS_MOUNT_NOAC) != 0); #if NFS_MOUNT_VERSION >= 2 printf("tcp = %d\n", (data.flags & NFS_MOUNT_TCP) != 0); #endif #endif data.version = nfs_mount_version; *mount_opts = (char *) &data; if (*flags & MS_REMOUNT) return 0; /* * If the previous mount operation on the same host was * backgrounded, and the "bg" for this mount is also set, * give up immediately, to avoid the initial timeout. */ if (bg && !running_bg && prev_bg_host && strcmp(hostname, prev_bg_host) == 0) { if (retry > 0) retval = EX_BG; return retval; } /* create mount deamon client */ /* See if the nfs host = mount host. */ if (mounthost) { if (mounthost[0] >= '0' && mounthost[0] <= '9') { mount_server_addr.sin_family = AF_INET; mount_server_addr.sin_addr.s_addr = inet_addr(hostname); } else { if ((hp = gethostbyname(mounthost)) == NULL) { bb_herror_msg("%s", mounthost); goto fail; } else { if (hp->h_length > sizeof(struct in_addr)) { bb_error_msg("got bad hp->h_length?"); hp->h_length = sizeof(struct in_addr); } mount_server_addr.sin_family = AF_INET; memcpy(&mount_server_addr.sin_addr, hp->h_addr, hp->h_length); } } } /* * The following loop implements the mount retries. On the first * call, "running_bg" is 0. When the mount times out, and the * "bg" option is set, the exit status EX_BG will be returned. * For a backgrounded mount, there will be a second call by the * child process with "running_bg" set to 1. * * The case where the mount point is not present and the "bg" * option is set, is treated as a timeout. This is done to * support nested mounts. * * The "retry" count specified by the user is the number of * minutes to retry before giving up. * * Only the first error message will be displayed. */ retry_timeout.tv_sec = 3; retry_timeout.tv_usec = 0; total_timeout.tv_sec = 20; total_timeout.tv_usec = 0; timeout = time(NULL) + 60 * retry; prevt = 0; t = 30; val = 1; for (;;) { if (bg && stat(node, &statbuf) == -1) { if (running_bg) { sleep(val); /* 1, 2, 4, 8, 16, 30, ... */ val *= 2; if (val > 30) val = 30; } } else { /* be careful not to use too many CPU cycles */ if (t - prevt < 30) sleep(30); pm_mnt = get_mountport(&mount_server_addr, mountprog, mountvers, proto, mountport); /* contact the mount daemon via TCP */ mount_server_addr.sin_port = htons(pm_mnt->pm_port); msock = RPC_ANYSOCK; switch (pm_mnt->pm_prot) { case IPPROTO_UDP: mclient = clntudp_create(&mount_server_addr, pm_mnt->pm_prog, pm_mnt->pm_vers, retry_timeout, &msock); if (mclient) break; mount_server_addr.sin_port = htons(pm_mnt->pm_port); msock = RPC_ANYSOCK; case IPPROTO_TCP: mclient = clnttcp_create(&mount_server_addr, pm_mnt->pm_prog, pm_mnt->pm_vers, &msock, 0, 0); break; default: mclient = 0; } if (mclient) { /* try to mount hostname:pathname */ mclient->cl_auth = authunix_create_default(); /* make pointers in xdr_mountres3 NULL so * that xdr_array allocates memory for us */ memset(&status, 0, sizeof(status)); if (pm_mnt->pm_vers == 3) clnt_stat = clnt_call(mclient, MOUNTPROC3_MNT, (xdrproc_t) xdr_dirpath, (caddr_t) &pathname, (xdrproc_t) xdr_mountres3, (caddr_t) &status, total_timeout); else clnt_stat = clnt_call(mclient, MOUNTPROC_MNT, (xdrproc_t) xdr_dirpath, (caddr_t) &pathname, (xdrproc_t) xdr_fhstatus, (caddr_t) &status, total_timeout); if (clnt_stat == RPC_SUCCESS) break; /* we're done */ if (errno != ECONNREFUSED) { clnt_perror(mclient, "mount"); goto fail; /* don't retry */ } if (!running_bg && prevt == 0) clnt_perror(mclient, "mount"); auth_destroy(mclient->cl_auth); clnt_destroy(mclient); mclient = 0; close(msock); } else { if (!running_bg && prevt == 0) clnt_pcreateerror("mount"); } prevt = t; } if (!bg) goto fail; if (!running_bg) { prev_bg_host = bb_xstrdup(hostname); if (retry > 0) retval = EX_BG; goto fail; } t = time(NULL); if (t >= timeout) goto fail; } nfsvers = (pm_mnt->pm_vers < 2) ? 2 : pm_mnt->pm_vers; if (nfsvers == 2) { if (status.nfsv2.fhs_status != 0) { bb_error_msg("%s:%s failed, reason given by server: %s", hostname, pathname, nfs_strerror(status.nfsv2.fhs_status)); goto fail; } memcpy(data.root.data, (char *) status.nfsv2.fhstatus_u.fhs_fhandle, NFS_FHSIZE); #if NFS_MOUNT_VERSION >= 4 data.root.size = NFS_FHSIZE; memcpy(data.old_root.data, (char *) status.nfsv2.fhstatus_u.fhs_fhandle, NFS_FHSIZE); #endif } else { #if NFS_MOUNT_VERSION >= 4 fhandle3 *my_fhandle; if (status.nfsv3.fhs_status != 0) { bb_error_msg("%s:%s failed, reason given by server: %s", hostname, pathname, nfs_strerror(status.nfsv3.fhs_status)); goto fail; } my_fhandle = &status.nfsv3.mountres3_u.mountinfo.fhandle; memset(data.old_root.data, 0, NFS_FHSIZE); memset(&data.root, 0, sizeof(data.root)); data.root.size = my_fhandle->fhandle3_len; memcpy(data.root.data, (char *) my_fhandle->fhandle3_val, my_fhandle->fhandle3_len); data.flags |= NFS_MOUNT_VER3; #endif } /* create nfs socket for kernel */ if (tcp) { if (nfs_mount_version < 3) { printf(_("NFS over TCP is not supported.\n")); goto fail; } fsock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); } else fsock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP); if (fsock < 0) { perror(_("nfs socket")); goto fail; } if (bindresvport(fsock, 0) < 0) { perror(_("nfs bindresvport")); goto fail; } if (port == 0) { server_addr.sin_port = PMAPPORT; port = pmap_getport(&server_addr, nfsprog, nfsvers, tcp ? IPPROTO_TCP : IPPROTO_UDP); if (port == 0) port = NFS_PORT; #ifdef NFS_MOUNT_DEBUG else printf(_("used portmapper to find NFS port\n")); #endif } #ifdef NFS_MOUNT_DEBUG printf(_("using port %d for nfs deamon\n"), port); #endif server_addr.sin_port = htons(port); /* * connect() the socket for kernels 1.3.10 and below only, * to avoid problems with multihomed hosts. * --Swen */ if (get_kernel_revision() <= 66314 && connect(fsock, (struct sockaddr *) &server_addr, sizeof (server_addr)) < 0) { perror(_("nfs connect")); goto fail; } /* prepare data structure for kernel */ data.fd = fsock; memcpy((char *) &data.addr, (char *) &server_addr, sizeof(data.addr)); strncpy(data.hostname, hostname, sizeof(data.hostname)); /* clean up */ auth_destroy(mclient->cl_auth); clnt_destroy(mclient); close(msock); return 0; /* abort */ fail: if (msock != -1) { if (mclient) { auth_destroy(mclient->cl_auth); clnt_destroy(mclient); } close(msock); } if (fsock != -1) close(fsock); return retval; }
int nfsmount(const char *spec, const char *node, int flags, char **extra_opts, int fake, int running_bg) { char hostdir[1024]; char *hostname, *dirname, *old_opts, *mounthost = NULL; char new_opts[1024], cbuf[1024]; static struct nfs_mount_data data; int val; static int doonce = 0; clnt_addr_t mnt_server = { &mounthost, }; clnt_addr_t nfs_server = { &hostname, }; struct sockaddr_in *nfs_saddr = &nfs_server.saddr; struct pmap *mnt_pmap = &mnt_server.pmap, *nfs_pmap = &nfs_server.pmap; struct pmap save_mnt, save_nfs; int fsock = -1; mntres_t mntres; struct stat statbuf; char *s; int bg, retry; int retval = EX_FAIL; time_t t; time_t prevt; time_t timeout; if (strlen(spec) >= sizeof(hostdir)) { nfs_error(_("%s: excessively long host:dir argument"), progname); goto fail; } strcpy(hostdir, spec); if ((s = strchr(hostdir, ':'))) { hostname = hostdir; dirname = s + 1; *s = '\0'; /* Ignore all but first hostname in replicated mounts until they can be fully supported. ([email protected]) */ if ((s = strchr(hostdir, ','))) { *s = '\0'; nfs_error(_("%s: warning: " "multiple hostnames not supported"), progname); } } else { nfs_error(_("%s: directory to mount not in host:dir format"), progname); goto fail; } if (!nfs_gethostbyname(hostname, nfs_saddr)) goto fail; mounthost = hostname; memcpy (&mnt_server.saddr, nfs_saddr, sizeof (mnt_server.saddr)); /* add IP address to mtab options for use when unmounting */ s = inet_ntoa(nfs_saddr->sin_addr); old_opts = *extra_opts; if (!old_opts) old_opts = ""; /* Set default options. * rsize/wsize (and bsize, for ver >= 3) are left 0 in order to * let the kernel decide. * timeo is filled in after we know whether it'll be TCP or UDP. */ memset(&data, 0, sizeof(data)); data.acregmin = 3; data.acregmax = 60; data.acdirmin = 30; data.acdirmax = 60; #if NFS_MOUNT_VERSION >= 2 data.namlen = NAME_MAX; #endif bg = 0; retry = -1; memset(mnt_pmap, 0, sizeof(*mnt_pmap)); mnt_pmap->pm_prog = MOUNTPROG; memset(nfs_pmap, 0, sizeof(*nfs_pmap)); nfs_pmap->pm_prog = NFS_PROGRAM; /* parse options */ new_opts[0] = 0; if (!parse_options(old_opts, &data, &bg, &retry, &mnt_server, &nfs_server, new_opts, sizeof(new_opts))) goto fail; if (!nfsmnt_check_compat(nfs_pmap, mnt_pmap)) goto fail; if (retry == -1) { if (bg) retry = 10000; /* 10000 mins == ~1 week*/ else retry = 2; /* 2 min default on fg mounts */ } #ifdef NFS_MOUNT_DEBUG printf(_("rsize = %d, wsize = %d, timeo = %d, retrans = %d\n"), data.rsize, data.wsize, data.timeo, data.retrans); printf(_("acreg (min, max) = (%d, %d), acdir (min, max) = (%d, %d)\n"), data.acregmin, data.acregmax, data.acdirmin, data.acdirmax); printf(_("port = %lu, bg = %d, retry = %d, flags = %.8x\n"), nfs_pmap->pm_port, bg, retry, data.flags); printf(_("mountprog = %lu, mountvers = %lu, nfsprog = %lu, nfsvers = %lu\n"), mnt_pmap->pm_prog, mnt_pmap->pm_vers, nfs_pmap->pm_prog, nfs_pmap->pm_vers); printf(_("soft = %d, intr = %d, posix = %d, nocto = %d, noac = %d"), (data.flags & NFS_MOUNT_SOFT) != 0, (data.flags & NFS_MOUNT_INTR) != 0, (data.flags & NFS_MOUNT_POSIX) != 0, (data.flags & NFS_MOUNT_NOCTO) != 0, (data.flags & NFS_MOUNT_NOAC) != 0); #if NFS_MOUNT_VERSION >= 2 printf(_(", tcp = %d"), (data.flags & NFS_MOUNT_TCP) != 0); #endif #if NFS_MOUNT_VERSION >= 4 printf(_(", noacl = %d"), (data.flags & NFS_MOUNT_NOACL) != 0); #endif #if NFS_MOUNT_VERSION >= 5 printf(_(", sec = %u"), data.pseudoflavor); printf(_(", readdirplus = %d"), (data.flags & NFS_MOUNT_NORDIRPLUS) != 0); #endif printf("\n"); #endif data.version = nfs_mount_data_version; if (flags & MS_REMOUNT) goto out_ok; /* create mount deamon client */ /* * The following loop implements the mount retries. On the first * call, "running_bg" is 0. When the mount times out, and the * "bg" option is set, the exit status EX_BG will be returned. * For a backgrounded mount, there will be a second call by the * child process with "running_bg" set to 1. * * The case where the mount point is not present and the "bg" * option is set, is treated as a timeout. This is done to * support nested mounts. * * The "retry" count specified by the user is the number of * minutes to retry before giving up. * * Only the first error message will be displayed. */ timeout = time(NULL) + 60 * retry; prevt = 0; t = 30; val = 1; memcpy(&save_nfs, nfs_pmap, sizeof(save_nfs)); memcpy(&save_mnt, mnt_pmap, sizeof(save_mnt)); for (;;) { if (bg && stat(node, &statbuf) == -1) { /* no mount point yet - sleep */ if (running_bg) { sleep(val); /* 1, 2, 4, 8, 16, 30, ... */ val *= 2; if (val > 30) val = 30; } } else { int stat; /* be careful not to use too many CPU cycles */ if (t - prevt < 30) sleep(30); stat = nfs_call_mount(&mnt_server, &nfs_server, &dirname, &mntres); if (stat) break; memcpy(nfs_pmap, &save_nfs, sizeof(*nfs_pmap)); memcpy(mnt_pmap, &save_mnt, sizeof(*mnt_pmap)); prevt = t; } if (!bg) { switch(rpc_createerr.cf_stat){ case RPC_TIMEDOUT: break; case RPC_SYSTEMERROR: if (errno == ETIMEDOUT) break; default: rpc_mount_errors(*nfs_server.hostname, 0, bg); goto fail; } t = time(NULL); if (t >= timeout) { rpc_mount_errors(*nfs_server.hostname, 0, bg); goto fail; } rpc_mount_errors(*nfs_server.hostname, 1, bg); continue; } if (!running_bg) { if (retry > 0) retval = EX_BG; goto fail; } t = time(NULL); if (t >= timeout) { rpc_mount_errors(*nfs_server.hostname, 0, bg); goto fail; } if (doonce++ < 1) rpc_mount_errors(*nfs_server.hostname, 1, bg); } if (mnt_pmap->pm_vers <= 2) { if (mntres.nfsv2.fhs_status != 0) { nfs_error(_("%s: %s:%s failed, reason given by server: %s"), progname, hostname, dirname, nfs_strerror(mntres.nfsv2.fhs_status)); goto fail; } memcpy(data.root.data, (char *) mntres.nfsv2.fhstatus_u.fhs_fhandle, NFS_FHSIZE); #if NFS_MOUNT_VERSION >= 4 data.root.size = NFS_FHSIZE; memcpy(data.old_root.data, (char *) mntres.nfsv2.fhstatus_u.fhs_fhandle, NFS_FHSIZE); #endif } else { #if NFS_MOUNT_VERSION >= 4 mountres3_ok *mountres; fhandle3 *fhandle; int i, n_flavors, *flavor, yum = 0; if (mntres.nfsv3.fhs_status != 0) { nfs_error(_("%s: %s:%s failed, reason given by server: %s"), progname, hostname, dirname, nfs_strerror(mntres.nfsv3.fhs_status)); goto fail; } #if NFS_MOUNT_VERSION >= 5 mountres = &mntres.nfsv3.mountres3_u.mountinfo; n_flavors = mountres->auth_flavors.auth_flavors_len; if (n_flavors <= 0) goto noauth_flavors; flavor = mountres->auth_flavors.auth_flavors_val; for (i = 0; i < n_flavors; ++i) { /* * Per RFC2623, section 2.7, we should prefer the * flavour listed first. * If no flavour requested, use the first simple * flavour that is offered. */ if (! (data.flags & NFS_MOUNT_SECFLAVOUR) && (flavor[i] == AUTH_SYS || flavor[i] == AUTH_NONE)) { data.pseudoflavor = flavor[i]; data.flags |= NFS_MOUNT_SECFLAVOUR; } if (flavor[i] == data.pseudoflavor) yum = 1; #ifdef NFS_MOUNT_DEBUG printf(_("auth flavor %d: %d\n"), i, flavor[i]); #endif } if (!yum) { nfs_error(_("%s: %s:%s failed, security flavor " "not supported"), progname, hostname, dirname); /* server has registered us in rmtab, send umount */ nfs_call_umount(&mnt_server, &dirname); goto fail; } noauth_flavors: #endif fhandle = &mntres.nfsv3.mountres3_u.mountinfo.fhandle; memset(data.old_root.data, 0, NFS_FHSIZE); memset(&data.root, 0, sizeof(data.root)); data.root.size = fhandle->fhandle3_len; memcpy(data.root.data, (char *) fhandle->fhandle3_val, fhandle->fhandle3_len); data.flags |= NFS_MOUNT_VER3; #endif } if (nfs_mount_data_version == 1) { /* create nfs socket for kernel */ if (nfs_pmap->pm_prot == IPPROTO_TCP) fsock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); else fsock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP); if (fsock < 0) { perror(_("nfs socket")); goto fail; } if (bindresvport(fsock, 0) < 0) { perror(_("nfs bindresvport")); goto fail; } } #ifdef NFS_MOUNT_DEBUG printf(_("using port %lu for nfs deamon\n"), nfs_pmap->pm_port); #endif nfs_saddr->sin_port = htons(nfs_pmap->pm_port); /* * connect() the socket for kernels 1.3.10 and below only, * to avoid problems with multihomed hosts. * --Swen */ if (linux_version_code() <= MAKE_VERSION(1, 3, 10) && fsock != -1 && connect(fsock, (struct sockaddr *) nfs_saddr, sizeof (*nfs_saddr)) < 0) { perror(_("nfs connect")); goto fail; } #if NFS_MOUNT_VERSION >= 2 if (nfs_pmap->pm_prot == IPPROTO_TCP) data.flags |= NFS_MOUNT_TCP; else data.flags &= ~NFS_MOUNT_TCP; #endif /* prepare data structure for kernel */ data.fd = fsock; memcpy((char *) &data.addr, (char *) nfs_saddr, sizeof(data.addr)); strncpy(data.hostname, hostname, sizeof(data.hostname)); out_ok: /* Ensure we have enough padding for the following strcat()s */ if (strlen(new_opts) + strlen(s) + 30 >= sizeof(new_opts)) { nfs_error(_("%s: excessively long option argument"), progname); goto fail; } snprintf(cbuf, sizeof(cbuf)-1, "addr=%s", s); strcat(new_opts, cbuf); *extra_opts = xstrdup(new_opts); if (!fake && !(data.flags & NFS_MOUNT_NONLM)) { if (!start_statd()) { nfs_error(_("%s: rpc.statd is not running but is " "required for remote locking.\n" " Either use '-o nolock' to keep " "locks local, or start statd."), progname); goto fail; } } if (!fake) { if (mount(spec, node, "nfs", flags & ~(MS_USER|MS_USERS), &data)) { mount_error(spec, node, errno); goto fail; } } return EX_SUCCESS; /* abort */ fail: if (fsock != -1) close(fsock); return retval; }
int nfsmount(const char *spec, const char *node, int *flags, char **orig_opts, char **extra_opts) { char hostdir[1024]; CLIENT *mclient; char *hostname; char *dirname; char new_opts[1024]; fhandle root_fhandle; struct timeval total_timeout; enum clnt_stat clnt_stat; static struct nfs_mount_data data; char *opts, *opt, *opteq; int val; struct hostent *hp; struct sockaddr_in server_addr; int msock, fsock; struct timeval pertry_timeout; struct fhstatus status; char *s; int port; int bg; int soft; int intr; int posix; int nocto; int noac; int retry; msock = fsock = -1; mclient = NULL; strcpy(hostdir, spec); if ((s = (strchr(hostdir, ':')))) { hostname = hostdir; dirname = s + 1; *s = '\0'; } else { fprintf(stderr, "mount: " "directory to mount not in host:dir format\n"); goto fail; } if (hostname[0] >= '0' && hostname[0] <= '9') { server_addr.sin_family = AF_INET; server_addr.sin_addr.s_addr = inet_addr(hostname); } else if ((hp = gethostbyname(hostname)) == NULL) { fprintf(stderr, "mount: can't get address for %s\n", hostname); goto fail; } else { server_addr.sin_family = AF_INET; memcpy(&server_addr.sin_addr, hp->h_addr, hp->h_length); } /* add IP address to mtab options for use when unmounting */ sprintf(new_opts, "%s%saddr=%s", *orig_opts ? *orig_opts : "", *orig_opts ? "," : "", inet_ntoa(server_addr.sin_addr)); *orig_opts = strdup(new_opts); /* set default options */ data.rsize = 0; /* let kernel decide */ data.wsize = 0; /* let kernel decide */ data.timeo = 7; data.retrans = 3; data.acregmin = 3; data.acregmax = 60; data.acdirmin = 30; data.acdirmax = 60; port = 2049; bg = 0; soft = 0; intr = 0; posix = 0; nocto = 0; noac = 0; retry = 10000; /* parse options */ if ((opts = *extra_opts)) { for (opt = strtok(opts, ","); opt; opt = strtok(NULL, ",")) { if ((opteq = strchr(opt, '='))) { val = atoi(opteq + 1); *opteq = '\0'; if (!strcmp(opt, "rsize")) data.rsize = val; else if (!strcmp(opt, "wsize")) data.wsize = val; else if (!strcmp(opt, "timeo")) data.timeo = val; else if (!strcmp(opt, "retrans")) data.retrans = val; else if (!strcmp(opt, "acregmin")) data.acregmin = val; else if (!strcmp(opt, "acregmax")) data.acregmax = val; else if (!strcmp(opt, "acdirmin")) data.acdirmin = val; else if (!strcmp(opt, "acdirmax")) data.acdirmax = val; else if (!strcmp(opt, "actimeo")) { data.acregmin = val; data.acregmax = val; data.acdirmin = val; data.acdirmax = val; } else if (!strcmp(opt, "port")) port = val; else if (!strcmp(opt, "retry")) retry = val; else { printf("unknown nfs mount parameter: " "%s=%d\n", opt, val); goto fail; } } else { val = 1; if (!strncmp(opt, "no", 2)) { val = 0; opt += 2; } if (!strcmp(opt, "bg")) bg = val; else if (!strcmp(opt, "fg")) bg = !val; else if (!strcmp(opt, "soft")) soft = val; else if (!strcmp(opt, "hard")) soft = !val; else if (!strcmp(opt, "intr")) intr = val; else if (!strcmp(opt, "posix")) posix = val; else if (!strcmp(opt, "cto")) nocto = !val; else if (!strcmp(opt, "ac")) noac = !val; else { printf("unknown nfs mount option: " "%s%s\n", val ? "" : "no", opt); goto fail; } } } } data.flags = (soft ? NFS_MOUNT_SOFT : 0) | (intr ? NFS_MOUNT_INTR : 0) | (posix ? NFS_MOUNT_POSIX : 0) | (nocto ? NFS_MOUNT_NOCTO : 0) | (noac ? NFS_MOUNT_NOAC : 0); #if 0 printf("rsize = %d, wsize = %d, timeo = %d, retrans = %d\n", data.rsize, data.wsize, data.timeo, data.retrans); printf("acreg (min, max) = (%d, %d), acdir (min, max) = (%d, %d)\n", data.acregmin, data.acregmax, data.acdirmin, data.acdirmax); printf("port = %d, bg = %d, retry = %d, flags = %.8x\n", port, bg, retry, data.flags); printf("soft = %d, intr = %d, posix = %d, nocto = %d, noac = %d\n", (data.flags & NFS_MOUNT_SOFT) != 0, (data.flags & NFS_MOUNT_INTR) != 0, (data.flags & NFS_MOUNT_POSIX) != 0, (data.flags & NFS_MOUNT_NOCTO) != 0, (data.flags & NFS_MOUNT_NOAC) != 0); goto fail; #endif /* create mount deamon client */ pertry_timeout.tv_sec = 3; pertry_timeout.tv_usec = 0; total_timeout.tv_sec = 20; total_timeout.tv_usec = 0; server_addr.sin_port = 0; msock = RPC_ANYSOCK; if ((mclient = clntudp_create(&server_addr, MOUNTPROG, MOUNTVERS, pertry_timeout, &msock)) == NULL) { clnt_pcreateerror("mount clntudp_create"); goto fail; } mclient->cl_auth = authunix_create_default(); /* try to mount hostname:dirname */ clnt_stat = clnt_call(mclient, MOUNTPROC_MNT, xdr_dirpath, &dirname, xdr_fhstatus, &status, total_timeout); if (clnt_stat != RPC_SUCCESS) { clnt_perror(mclient, "rpc mount"); goto fail; } if (status.fhs_status != 0) { fprintf(stderr, "mount: %s:%s failed, reason given by server: %s\n", hostname, dirname, nfs_strerror(status.fhs_status)); goto fail; } memcpy((char *) &root_fhandle, (char *) status.fhstatus_u.fhs_fhandle, sizeof (root_fhandle)); /* create nfs socket for kernel */ fsock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP); if (fsock < 0) { perror("nfs socket"); goto fail; } if (bindresvport(fsock, 0) < 0) { perror("nfs bindresvport"); goto fail; } server_addr.sin_port = htons(port); if (connect(fsock, (struct sockaddr *) &server_addr, sizeof (server_addr)) < 0) { perror("nfs connect"); goto fail; } /* prepare data structure for kernel */ data.version = NFS_MOUNT_VERSION; data.fd = fsock; memcpy((char *) &data.root, (char *) &root_fhandle, sizeof (root_fhandle)); memcpy((char *) &data.addr, (char *) &server_addr, sizeof(data.addr)); strncpy(data.hostname, hostname, sizeof(data.hostname)); *extra_opts = (char *) &data; /* clean up */ auth_destroy(mclient->cl_auth); clnt_destroy(mclient); close(msock); return 0; /* abort */ fail: if (msock != -1) { auth_destroy(mclient->cl_auth); clnt_destroy(mclient); close(msock); } if (fsock != -1) close(fsock); return 1; }