2 * utils/exportfs/exportfs.c
4 * Export file systems to knfsd
6 * Copyright (C) 1995, 1996, 1997 Olaf Kirch <okir@monad.swb.de>
8 * Extensive changes, 1999, Neil Brown <neilb@cse.unsw.edu.au>
30 static void export_all(int verbose);
31 static void exportfs(char *arg, char *options, int verbose);
32 static void unexportfs(char *arg, int verbose);
33 static void exports_update(int verbose);
34 static void dump(int verbose);
35 static void error(nfs_export *exp, int err);
36 static void usage(void);
37 static void validate_export(nfs_export *exp);
40 main(int argc, char **argv)
52 xlog_open("exportfs");
56 while ((c = getopt(argc, argv, "aio:ruvf")) != EOF) {
86 if (optind != argc && f_all) {
87 fprintf(stderr,"exportfs: extra arguments are not permitted with -a or -r.\n");
90 if (f_ignore && (f_all || ! f_export)) {
91 fprintf(stderr,"exportfs: -i not meaningful with -a, -r or -u.\n");
94 if (f_reexport && ! f_export) {
95 fprintf(stderr, "exportfs: -r and -u are incompatible.\n");
98 new_cache = check_new_cache();
99 if (optind == argc && ! f_all) {
104 fprintf(stderr, "exportfs: -f: only available with new cache controls: mount /proc/fs/nfsd first\n");
115 if (f_export && ! f_ignore)
116 export_read(_PATH_EXPORTS);
119 export_all(f_verbose);
121 for (i = optind; i < argc ; i++)
122 exportfs(argv[i], options, f_verbose);
124 /* If we are unexporting everything, then
125 * don't care about what should be exported, as that
126 * may require DNS lookups..
128 if (! ( !f_export && f_all)) {
129 /* note: xtab_*_read does not update entries if they already exist,
130 * so this will not lose new options
135 for (i = optind ; i < argc ; i++)
136 unexportfs(argv[i], f_verbose);
142 exports_update(f_verbose);
146 cache_flush(force_flush);
154 exports_update_one(nfs_export *exp, int verbose)
156 /* check mountpoint option */
157 if (exp->m_mayexport &&
158 exp->m_export.e_mountpoint &&
159 !is_mountpoint(exp->m_export.e_mountpoint[0]?
160 exp->m_export.e_mountpoint:
161 exp->m_export.e_path)) {
162 printf("%s not exported as %s not a mountpoint.\n",
163 exp->m_export.e_path, exp->m_export.e_mountpoint);
164 exp->m_mayexport = 0;
166 if (exp->m_mayexport && ((exp->m_exported<1) || exp->m_changed)) {
168 printf("%sexporting %s:%s to kernel\n",
169 exp->m_exported ?"re":"",
170 exp->m_client->m_hostname,
171 exp->m_export.e_path);
172 if (!export_export(exp))
175 if (exp->m_exported && ! exp->m_mayexport) {
177 printf("unexporting %s:%s from kernel\n",
178 exp->m_client->m_hostname,
179 exp->m_export.e_path);
180 if (!export_unexport(exp))
186 /* we synchronise intention with reality.
187 * entries with m_mayexport get exported
188 * entries with m_exported but not m_mayexport get unexported
189 * looking at m_client->m_type == MCL_FQDN and m_client->m_type == MCL_GSS only
192 exports_update(int verbose)
196 for (exp = exportlist[MCL_FQDN]; exp; exp=exp->m_next) {
197 exports_update_one(exp, verbose);
199 for (exp = exportlist[MCL_GSS]; exp; exp=exp->m_next) {
200 exports_update_one(exp, verbose);
205 * export_all finds all entries and
206 * marks them xtabent and mayexport so that they get exported
209 export_all(int verbose)
214 for (i = 0; i < MCL_MAXTYPES; i++) {
215 for (exp = exportlist[i]; exp; exp = exp->m_next) {
217 printf("exporting %s:%s\n",
218 exp->m_client->m_hostname,
219 exp->m_export.e_path);
221 exp->m_mayexport = 1;
224 validate_export(exp);
231 exportfs(char *arg, char *options, int verbose)
233 struct exportent *eep;
235 struct hostent *hp = NULL;
240 if ((path = strchr(arg, ':')) != NULL)
243 if (!path || *path != '/') {
244 fprintf(stderr, "Invalid exporting option: %s\n", arg);
248 if ((htype = client_gettype(hname)) == MCL_FQDN &&
249 (hp = gethostbyname(hname)) != NULL) {
250 struct hostent *hp2 = hostent_dup (hp);
251 hp = gethostbyaddr(hp2->h_addr, hp2->h_length,
255 hp = hostent_dup(hp);
258 exp = export_find(hp, path);
261 exp = export_lookup(hname, path, 0);
265 if (!(eep = mkexportent(hname, path, options)) ||
266 !(exp = export_create(eep, 0))) {
270 } else if (!updateexportent(&exp->m_export, options)) {
276 printf("exporting %s:%s\n", exp->m_client->m_hostname,
277 exp->m_export.e_path);
279 exp->m_mayexport = 1;
282 validate_export(exp);
287 unexportfs(char *arg, int verbose)
290 struct hostent *hp = NULL;
295 if ((path = strchr(arg, ':')) != NULL)
298 if (!path || *path != '/') {
299 fprintf(stderr, "Invalid unexporting option: %s\n",
304 if ((htype = client_gettype(hname)) == MCL_FQDN) {
305 if ((hp = gethostbyname(hname)) != 0) {
306 hp = hostent_dup (hp);
307 hname = (char *) hp->h_name;
311 for (exp = exportlist[htype]; exp; exp = exp->m_next) {
312 if (path && strcmp(path, exp->m_export.e_path))
314 if (htype != exp->m_client->m_type)
316 if (htype == MCL_FQDN
317 && !matchhostname(exp->m_export.e_hostname,
320 if (htype != MCL_FQDN
321 && strcasecmp(exp->m_export.e_hostname, hname))
325 if (exp->m_exported) {
326 printf("unexporting %s:%s from kernel\n",
327 exp->m_client->m_hostname,
328 exp->m_export.e_path);
332 printf("unexporting %s:%s\n",
333 exp->m_client->m_hostname,
334 exp->m_export.e_path);
337 if (exp->m_exported && !export_unexport(exp))
341 exp->m_mayexport = 0;
347 static int can_test(void)
351 char *setup = "nfsd 0.0.0.0 2147483647 -test-client-\n";
352 fd = open("/proc/net/rpc/auth.unix.ip/channel", O_WRONLY);
353 if ( fd < 0) return 0;
354 n = write(fd, setup, strlen(setup));
358 fd = open("/proc/net/rpc/nfsd.export/channel", O_WRONLY);
359 if ( fd < 0) return 0;
364 static int test_export(char *path, int with_fsid)
369 sprintf(buf, "-test-client- %s 3 %d -1 -1 0\n",
371 with_fsid ? NFSEXP_FSID : 0);
372 fd = open("/proc/net/rpc/nfsd.export/channel", O_WRONLY);
375 n = write(fd, buf, strlen(buf));
383 validate_export(nfs_export *exp)
385 /* Check that the given export point is potentially exportable.
386 * We just give warnings here, don't cause anything to fail.
387 * If a path doesn't exist, or is not a dir or file, give an warning
388 * otherwise trial-export to '-test-client-' and check for failure.
391 char *path = exp->m_export.e_path;
395 if (stat(path, &stb) < 0) {
396 fprintf(stderr, "exportfs: Warning: %s does not exist\n",
400 if (!S_ISDIR(stb.st_mode) && !S_ISREG(stb.st_mode)) {
401 fprintf(stderr, "exportfs: Warning: %s is neither "
402 "a directory nor a file.\n"
403 " remote access will fail\n", path);
409 if (!statfs64(path, &stf) &&
410 (stf.f_fsid.__val[0] || stf.f_fsid.__val[1]))
413 if ((exp->m_export.e_flags & NFSEXP_FSID) || exp->m_export.e_uuid ||
415 if ( !test_export(path, 1)) {
416 fprintf(stderr, "exportfs: Warning: %s does not "
417 "support NFS export.\n",
421 } else if ( ! test_export(path, 0)) {
422 if (test_export(path, 1))
423 fprintf(stderr, "exportfs: Warning: %s requires fsid= "
424 "for NFS export\n", path);
426 fprintf(stderr, "exportfs: Warning: %s does not "
427 "support NFS export.\n",
436 dumpopt(char c, char *fmt, ...)
451 struct exportent *ep;
455 for (htype = 0; htype < MCL_MAXTYPES; htype++) {
456 for (exp = exportlist[htype]; exp; exp = exp->m_next) {
459 continue; /* neilb */
460 if (htype == MCL_ANONYMOUS)
463 hname = ep->e_hostname;
464 if (strlen(ep->e_path) > 14)
465 printf("%-14s\n\t\t%s", ep->e_path, hname);
467 printf("%-14s\t%s", ep->e_path, hname);
473 if (ep->e_flags & NFSEXP_READONLY)
474 c = dumpopt(c, "ro");
476 c = dumpopt(c, "rw");
477 if (ep->e_flags & NFSEXP_ASYNC)
478 c = dumpopt(c, "async");
479 if (ep->e_flags & NFSEXP_GATHERED_WRITES)
480 c = dumpopt(c, "wdelay");
481 if (ep->e_flags & NFSEXP_NOHIDE)
482 c = dumpopt(c, "nohide");
483 if (ep->e_flags & NFSEXP_CROSSMOUNT)
484 c = dumpopt(c, "crossmnt");
485 if (ep->e_flags & NFSEXP_INSECURE_PORT)
486 c = dumpopt(c, "insecure");
487 if (ep->e_flags & NFSEXP_ROOTSQUASH)
488 c = dumpopt(c, "root_squash");
490 c = dumpopt(c, "no_root_squash");
491 if (ep->e_flags & NFSEXP_ALLSQUASH)
492 c = dumpopt(c, "all_squash");
493 if (ep->e_flags & NFSEXP_NOSUBTREECHECK)
494 c = dumpopt(c, "no_subtree_check");
495 if (ep->e_flags & NFSEXP_NOAUTHNLM)
496 c = dumpopt(c, "insecure_locks");
497 if (ep->e_flags & NFSEXP_NOACL)
498 c = dumpopt(c, "no_acl");
499 if (ep->e_flags & NFSEXP_FSID)
500 c = dumpopt(c, "fsid=%d", ep->e_fsid);
502 c = dumpopt(c, "fsid=%s", ep->e_uuid);
503 if (ep->e_mountpoint)
504 c = dumpopt(c, "mountpoint%s%s",
505 ep->e_mountpoint[0]?"=":"",
507 if (ep->e_anonuid != 65534)
508 c = dumpopt(c, "anonuid=%d", ep->e_anonuid);
509 if (ep->e_anongid != 65534)
510 c = dumpopt(c, "anongid=%d", ep->e_anongid);
511 switch(ep->e_fslocmethod) {
515 c = dumpopt(c, "refer=%s", ep->e_fslocdata);
518 c = dumpopt(c, "replicas=%s", ep->e_fslocdata);
522 c = dumpopt(c, "fsloc=stub");
526 secinfo_show(stdout, ep);
527 printf("%c\n", (c != '(')? ')' : ' ');
533 error(nfs_export *exp, int err)
535 fprintf(stderr, "%s:%s: %s\n", exp->m_client->m_hostname,
536 exp->m_export.e_path, strerror(err));
542 fprintf(stderr, "usage: exportfs [-aruv] [host:/path]\n");