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14#include <linux/slab.h>
15#include <linux/namei.h>
16#include <linux/module.h>
17#include <linux/exportfs.h>
18
19#include <linux/nfsd/syscall.h>
20#include <net/ipv6.h>
21
22#include "nfsd.h"
23#include "nfsfh.h"
24
25#define NFSDDBG_FACILITY NFSDDBG_EXPORT
26
27typedef struct auth_domain svc_client;
28typedef struct svc_export svc_export;
29
30
31
32
33
34
35
36
37
38
39#define EXPKEY_HASHBITS 8
40#define EXPKEY_HASHMAX (1 << EXPKEY_HASHBITS)
41#define EXPKEY_HASHMASK (EXPKEY_HASHMAX -1)
42static struct cache_head *expkey_table[EXPKEY_HASHMAX];
43
44static void expkey_put(struct kref *ref)
45{
46 struct svc_expkey *key = container_of(ref, struct svc_expkey, h.ref);
47
48 if (test_bit(CACHE_VALID, &key->h.flags) &&
49 !test_bit(CACHE_NEGATIVE, &key->h.flags))
50 path_put(&key->ek_path);
51 auth_domain_put(key->ek_client);
52 kfree(key);
53}
54
55static void expkey_request(struct cache_detail *cd,
56 struct cache_head *h,
57 char **bpp, int *blen)
58{
59
60 struct svc_expkey *ek = container_of(h, struct svc_expkey, h);
61 char type[5];
62
63 qword_add(bpp, blen, ek->ek_client->name);
64 snprintf(type, 5, "%d", ek->ek_fsidtype);
65 qword_add(bpp, blen, type);
66 qword_addhex(bpp, blen, (char*)ek->ek_fsid, key_len(ek->ek_fsidtype));
67 (*bpp)[-1] = '\n';
68}
69
70static int expkey_upcall(struct cache_detail *cd, struct cache_head *h)
71{
72 return sunrpc_cache_pipe_upcall(cd, h, expkey_request);
73}
74
75static struct svc_expkey *svc_expkey_update(struct svc_expkey *new, struct svc_expkey *old);
76static struct svc_expkey *svc_expkey_lookup(struct svc_expkey *);
77static struct cache_detail svc_expkey_cache;
78
79static int expkey_parse(struct cache_detail *cd, char *mesg, int mlen)
80{
81
82 char *buf;
83 int len;
84 struct auth_domain *dom = NULL;
85 int err;
86 int fsidtype;
87 char *ep;
88 struct svc_expkey key;
89 struct svc_expkey *ek = NULL;
90
91 if (mesg[mlen-1] != '\n')
92 return -EINVAL;
93 mesg[mlen-1] = 0;
94
95 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
96 err = -ENOMEM;
97 if (!buf)
98 goto out;
99
100 err = -EINVAL;
101 if ((len=qword_get(&mesg, buf, PAGE_SIZE)) <= 0)
102 goto out;
103
104 err = -ENOENT;
105 dom = auth_domain_find(buf);
106 if (!dom)
107 goto out;
108 dprintk("found domain %s\n", buf);
109
110 err = -EINVAL;
111 if ((len=qword_get(&mesg, buf, PAGE_SIZE)) <= 0)
112 goto out;
113 fsidtype = simple_strtoul(buf, &ep, 10);
114 if (*ep)
115 goto out;
116 dprintk("found fsidtype %d\n", fsidtype);
117 if (key_len(fsidtype)==0)
118 goto out;
119 if ((len=qword_get(&mesg, buf, PAGE_SIZE)) <= 0)
120 goto out;
121 dprintk("found fsid length %d\n", len);
122 if (len != key_len(fsidtype))
123 goto out;
124
125
126 key.h.flags = 0;
127 key.h.expiry_time = get_expiry(&mesg);
128 if (key.h.expiry_time == 0)
129 goto out;
130
131 key.ek_client = dom;
132 key.ek_fsidtype = fsidtype;
133 memcpy(key.ek_fsid, buf, len);
134
135 ek = svc_expkey_lookup(&key);
136 err = -ENOMEM;
137 if (!ek)
138 goto out;
139
140
141 err = -EINVAL;
142 len = qword_get(&mesg, buf, PAGE_SIZE);
143 if (len < 0)
144 goto out;
145 dprintk("Path seems to be <%s>\n", buf);
146 err = 0;
147 if (len == 0) {
148 set_bit(CACHE_NEGATIVE, &key.h.flags);
149 ek = svc_expkey_update(&key, ek);
150 if (!ek)
151 err = -ENOMEM;
152 } else {
153 err = kern_path(buf, 0, &key.ek_path);
154 if (err)
155 goto out;
156
157 dprintk("Found the path %s\n", buf);
158
159 ek = svc_expkey_update(&key, ek);
160 if (!ek)
161 err = -ENOMEM;
162 path_put(&key.ek_path);
163 }
164 cache_flush();
165 out:
166 if (ek)
167 cache_put(&ek->h, &svc_expkey_cache);
168 if (dom)
169 auth_domain_put(dom);
170 kfree(buf);
171 return err;
172}
173
174static int expkey_show(struct seq_file *m,
175 struct cache_detail *cd,
176 struct cache_head *h)
177{
178 struct svc_expkey *ek ;
179 int i;
180
181 if (h ==NULL) {
182 seq_puts(m, "#domain fsidtype fsid [path]\n");
183 return 0;
184 }
185 ek = container_of(h, struct svc_expkey, h);
186 seq_printf(m, "%s %d 0x", ek->ek_client->name,
187 ek->ek_fsidtype);
188 for (i=0; i < key_len(ek->ek_fsidtype)/4; i++)
189 seq_printf(m, "%08x", ek->ek_fsid[i]);
190 if (test_bit(CACHE_VALID, &h->flags) &&
191 !test_bit(CACHE_NEGATIVE, &h->flags)) {
192 seq_printf(m, " ");
193 seq_path(m, &ek->ek_path, "\\ \t\n");
194 }
195 seq_printf(m, "\n");
196 return 0;
197}
198
199static inline int expkey_match (struct cache_head *a, struct cache_head *b)
200{
201 struct svc_expkey *orig = container_of(a, struct svc_expkey, h);
202 struct svc_expkey *new = container_of(b, struct svc_expkey, h);
203
204 if (orig->ek_fsidtype != new->ek_fsidtype ||
205 orig->ek_client != new->ek_client ||
206 memcmp(orig->ek_fsid, new->ek_fsid, key_len(orig->ek_fsidtype)) != 0)
207 return 0;
208 return 1;
209}
210
211static inline void expkey_init(struct cache_head *cnew,
212 struct cache_head *citem)
213{
214 struct svc_expkey *new = container_of(cnew, struct svc_expkey, h);
215 struct svc_expkey *item = container_of(citem, struct svc_expkey, h);
216
217 kref_get(&item->ek_client->ref);
218 new->ek_client = item->ek_client;
219 new->ek_fsidtype = item->ek_fsidtype;
220
221 memcpy(new->ek_fsid, item->ek_fsid, sizeof(new->ek_fsid));
222}
223
224static inline void expkey_update(struct cache_head *cnew,
225 struct cache_head *citem)
226{
227 struct svc_expkey *new = container_of(cnew, struct svc_expkey, h);
228 struct svc_expkey *item = container_of(citem, struct svc_expkey, h);
229
230 new->ek_path = item->ek_path;
231 path_get(&item->ek_path);
232}
233
234static struct cache_head *expkey_alloc(void)
235{
236 struct svc_expkey *i = kmalloc(sizeof(*i), GFP_KERNEL);
237 if (i)
238 return &i->h;
239 else
240 return NULL;
241}
242
243static struct cache_detail svc_expkey_cache = {
244 .owner = THIS_MODULE,
245 .hash_size = EXPKEY_HASHMAX,
246 .hash_table = expkey_table,
247 .name = "nfsd.fh",
248 .cache_put = expkey_put,
249 .cache_upcall = expkey_upcall,
250 .cache_parse = expkey_parse,
251 .cache_show = expkey_show,
252 .match = expkey_match,
253 .init = expkey_init,
254 .update = expkey_update,
255 .alloc = expkey_alloc,
256};
257
258static int
259svc_expkey_hash(struct svc_expkey *item)
260{
261 int hash = item->ek_fsidtype;
262 char * cp = (char*)item->ek_fsid;
263 int len = key_len(item->ek_fsidtype);
264
265 hash ^= hash_mem(cp, len, EXPKEY_HASHBITS);
266 hash ^= hash_ptr(item->ek_client, EXPKEY_HASHBITS);
267 hash &= EXPKEY_HASHMASK;
268 return hash;
269}
270
271static struct svc_expkey *
272svc_expkey_lookup(struct svc_expkey *item)
273{
274 struct cache_head *ch;
275 int hash = svc_expkey_hash(item);
276
277 ch = sunrpc_cache_lookup(&svc_expkey_cache, &item->h,
278 hash);
279 if (ch)
280 return container_of(ch, struct svc_expkey, h);
281 else
282 return NULL;
283}
284
285static struct svc_expkey *
286svc_expkey_update(struct svc_expkey *new, struct svc_expkey *old)
287{
288 struct cache_head *ch;
289 int hash = svc_expkey_hash(new);
290
291 ch = sunrpc_cache_update(&svc_expkey_cache, &new->h,
292 &old->h, hash);
293 if (ch)
294 return container_of(ch, struct svc_expkey, h);
295 else
296 return NULL;
297}
298
299
300#define EXPORT_HASHBITS 8
301#define EXPORT_HASHMAX (1<< EXPORT_HASHBITS)
302#define EXPORT_HASHMASK (EXPORT_HASHMAX -1)
303
304static struct cache_head *export_table[EXPORT_HASHMAX];
305
306static void nfsd4_fslocs_free(struct nfsd4_fs_locations *fsloc)
307{
308 int i;
309
310 for (i = 0; i < fsloc->locations_count; i++) {
311 kfree(fsloc->locations[i].path);
312 kfree(fsloc->locations[i].hosts);
313 }
314 kfree(fsloc->locations);
315}
316
317static void svc_export_put(struct kref *ref)
318{
319 struct svc_export *exp = container_of(ref, struct svc_export, h.ref);
320 path_put(&exp->ex_path);
321 auth_domain_put(exp->ex_client);
322 kfree(exp->ex_pathname);
323 nfsd4_fslocs_free(&exp->ex_fslocs);
324 kfree(exp);
325}
326
327static void svc_export_request(struct cache_detail *cd,
328 struct cache_head *h,
329 char **bpp, int *blen)
330{
331
332 struct svc_export *exp = container_of(h, struct svc_export, h);
333 char *pth;
334
335 qword_add(bpp, blen, exp->ex_client->name);
336 pth = d_path(&exp->ex_path, *bpp, *blen);
337 if (IS_ERR(pth)) {
338
339 (*bpp)[0] = '\n';
340 return;
341 }
342 qword_add(bpp, blen, pth);
343 (*bpp)[-1] = '\n';
344}
345
346static int svc_export_upcall(struct cache_detail *cd, struct cache_head *h)
347{
348 return sunrpc_cache_pipe_upcall(cd, h, svc_export_request);
349}
350
351static struct svc_export *svc_export_update(struct svc_export *new,
352 struct svc_export *old);
353static struct svc_export *svc_export_lookup(struct svc_export *);
354
355static int check_export(struct inode *inode, int *flags, unsigned char *uuid)
356{
357
358
359
360
361
362 if (!S_ISDIR(inode->i_mode) &&
363 !S_ISLNK(inode->i_mode) &&
364 !S_ISREG(inode->i_mode))
365 return -ENOTDIR;
366
367
368
369
370
371 if (*flags & NFSEXP_V4ROOT)
372 *flags |= NFSEXP_READONLY;
373
374
375
376
377
378
379
380
381 if (!(inode->i_sb->s_type->fs_flags & FS_REQUIRES_DEV) &&
382 !(*flags & NFSEXP_FSID) &&
383 uuid == NULL) {
384 dprintk("exp_export: export of non-dev fs without fsid\n");
385 return -EINVAL;
386 }
387
388 if (!inode->i_sb->s_export_op ||
389 !inode->i_sb->s_export_op->fh_to_dentry) {
390 dprintk("exp_export: export of invalid fs type.\n");
391 return -EINVAL;
392 }
393
394 return 0;
395
396}
397
398#ifdef CONFIG_NFSD_V4
399
400static int
401fsloc_parse(char **mesg, char *buf, struct nfsd4_fs_locations *fsloc)
402{
403 int len;
404 int migrated, i, err;
405
406
407 err = get_int(mesg, &fsloc->locations_count);
408 if (err)
409 return err;
410 if (fsloc->locations_count > MAX_FS_LOCATIONS)
411 return -EINVAL;
412 if (fsloc->locations_count == 0)
413 return 0;
414
415 fsloc->locations = kzalloc(fsloc->locations_count
416 * sizeof(struct nfsd4_fs_location), GFP_KERNEL);
417 if (!fsloc->locations)
418 return -ENOMEM;
419 for (i=0; i < fsloc->locations_count; i++) {
420
421 err = -EINVAL;
422 len = qword_get(mesg, buf, PAGE_SIZE);
423 if (len <= 0)
424 goto out_free_all;
425 err = -ENOMEM;
426 fsloc->locations[i].hosts = kstrdup(buf, GFP_KERNEL);
427 if (!fsloc->locations[i].hosts)
428 goto out_free_all;
429 err = -EINVAL;
430
431 len = qword_get(mesg, buf, PAGE_SIZE);
432 if (len <= 0)
433 goto out_free_all;
434 err = -ENOMEM;
435 fsloc->locations[i].path = kstrdup(buf, GFP_KERNEL);
436 if (!fsloc->locations[i].path)
437 goto out_free_all;
438 }
439
440 err = get_int(mesg, &migrated);
441 if (err)
442 goto out_free_all;
443 err = -EINVAL;
444 if (migrated < 0 || migrated > 1)
445 goto out_free_all;
446 fsloc->migrated = migrated;
447 return 0;
448out_free_all:
449 nfsd4_fslocs_free(fsloc);
450 return err;
451}
452
453static int secinfo_parse(char **mesg, char *buf, struct svc_export *exp)
454{
455 int listsize, err;
456 struct exp_flavor_info *f;
457
458 err = get_int(mesg, &listsize);
459 if (err)
460 return err;
461 if (listsize < 0 || listsize > MAX_SECINFO_LIST)
462 return -EINVAL;
463
464 for (f = exp->ex_flavors; f < exp->ex_flavors + listsize; f++) {
465 err = get_int(mesg, &f->pseudoflavor);
466 if (err)
467 return err;
468
469
470
471
472
473
474 err = get_int(mesg, &f->flags);
475 if (err)
476 return err;
477
478 if (~NFSEXP_SECINFO_FLAGS & (f->flags ^ exp->ex_flags))
479 return -EINVAL;
480 }
481 exp->ex_nflavors = listsize;
482 return 0;
483}
484
485#else
486static inline int
487fsloc_parse(char **mesg, char *buf, struct nfsd4_fs_locations *fsloc){return 0;}
488static inline int
489secinfo_parse(char **mesg, char *buf, struct svc_export *exp) { return 0; }
490#endif
491
492static int svc_export_parse(struct cache_detail *cd, char *mesg, int mlen)
493{
494
495 char *buf;
496 int len;
497 int err;
498 struct auth_domain *dom = NULL;
499 struct svc_export exp = {}, *expp;
500 int an_int;
501
502 if (mesg[mlen-1] != '\n')
503 return -EINVAL;
504 mesg[mlen-1] = 0;
505
506 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
507 if (!buf)
508 return -ENOMEM;
509
510
511 err = -EINVAL;
512 len = qword_get(&mesg, buf, PAGE_SIZE);
513 if (len <= 0)
514 goto out;
515
516 err = -ENOENT;
517 dom = auth_domain_find(buf);
518 if (!dom)
519 goto out;
520
521
522 err = -EINVAL;
523 if ((len = qword_get(&mesg, buf, PAGE_SIZE)) <= 0)
524 goto out1;
525
526 err = kern_path(buf, 0, &exp.ex_path);
527 if (err)
528 goto out1;
529
530 exp.ex_client = dom;
531
532 err = -ENOMEM;
533 exp.ex_pathname = kstrdup(buf, GFP_KERNEL);
534 if (!exp.ex_pathname)
535 goto out2;
536
537
538 err = -EINVAL;
539 exp.h.expiry_time = get_expiry(&mesg);
540 if (exp.h.expiry_time == 0)
541 goto out3;
542
543
544 err = get_int(&mesg, &an_int);
545 if (err == -ENOENT) {
546 err = 0;
547 set_bit(CACHE_NEGATIVE, &exp.h.flags);
548 } else {
549 if (err || an_int < 0)
550 goto out3;
551 exp.ex_flags= an_int;
552
553
554 err = get_int(&mesg, &an_int);
555 if (err)
556 goto out3;
557 exp.ex_anon_uid= an_int;
558
559
560 err = get_int(&mesg, &an_int);
561 if (err)
562 goto out3;
563 exp.ex_anon_gid= an_int;
564
565
566 err = get_int(&mesg, &an_int);
567 if (err)
568 goto out3;
569 exp.ex_fsid = an_int;
570
571 while ((len = qword_get(&mesg, buf, PAGE_SIZE)) > 0) {
572 if (strcmp(buf, "fsloc") == 0)
573 err = fsloc_parse(&mesg, buf, &exp.ex_fslocs);
574 else if (strcmp(buf, "uuid") == 0) {
575
576 len = qword_get(&mesg, buf, PAGE_SIZE);
577 if (len != 16)
578 err = -EINVAL;
579 else {
580 exp.ex_uuid =
581 kmemdup(buf, 16, GFP_KERNEL);
582 if (exp.ex_uuid == NULL)
583 err = -ENOMEM;
584 }
585 } else if (strcmp(buf, "secinfo") == 0)
586 err = secinfo_parse(&mesg, buf, &exp);
587 else
588
589
590
591
592 break;
593 if (err)
594 goto out4;
595 }
596
597 err = check_export(exp.ex_path.dentry->d_inode, &exp.ex_flags,
598 exp.ex_uuid);
599 if (err)
600 goto out4;
601 }
602
603 expp = svc_export_lookup(&exp);
604 if (expp)
605 expp = svc_export_update(&exp, expp);
606 else
607 err = -ENOMEM;
608 cache_flush();
609 if (expp == NULL)
610 err = -ENOMEM;
611 else
612 exp_put(expp);
613out4:
614 nfsd4_fslocs_free(&exp.ex_fslocs);
615 kfree(exp.ex_uuid);
616out3:
617 kfree(exp.ex_pathname);
618out2:
619 path_put(&exp.ex_path);
620out1:
621 auth_domain_put(dom);
622out:
623 kfree(buf);
624 return err;
625}
626
627static void exp_flags(struct seq_file *m, int flag, int fsid,
628 uid_t anonu, uid_t anong, struct nfsd4_fs_locations *fslocs);
629static void show_secinfo(struct seq_file *m, struct svc_export *exp);
630
631static int svc_export_show(struct seq_file *m,
632 struct cache_detail *cd,
633 struct cache_head *h)
634{
635 struct svc_export *exp ;
636
637 if (h ==NULL) {
638 seq_puts(m, "#path domain(flags)\n");
639 return 0;
640 }
641 exp = container_of(h, struct svc_export, h);
642 seq_path(m, &exp->ex_path, " \t\n\\");
643 seq_putc(m, '\t');
644 seq_escape(m, exp->ex_client->name, " \t\n\\");
645 seq_putc(m, '(');
646 if (test_bit(CACHE_VALID, &h->flags) &&
647 !test_bit(CACHE_NEGATIVE, &h->flags)) {
648 exp_flags(m, exp->ex_flags, exp->ex_fsid,
649 exp->ex_anon_uid, exp->ex_anon_gid, &exp->ex_fslocs);
650 if (exp->ex_uuid) {
651 int i;
652 seq_puts(m, ",uuid=");
653 for (i=0; i<16; i++) {
654 if ((i&3) == 0 && i)
655 seq_putc(m, ':');
656 seq_printf(m, "%02x", exp->ex_uuid[i]);
657 }
658 }
659 show_secinfo(m, exp);
660 }
661 seq_puts(m, ")\n");
662 return 0;
663}
664static int svc_export_match(struct cache_head *a, struct cache_head *b)
665{
666 struct svc_export *orig = container_of(a, struct svc_export, h);
667 struct svc_export *new = container_of(b, struct svc_export, h);
668 return orig->ex_client == new->ex_client &&
669 orig->ex_path.dentry == new->ex_path.dentry &&
670 orig->ex_path.mnt == new->ex_path.mnt;
671}
672
673static void svc_export_init(struct cache_head *cnew, struct cache_head *citem)
674{
675 struct svc_export *new = container_of(cnew, struct svc_export, h);
676 struct svc_export *item = container_of(citem, struct svc_export, h);
677
678 kref_get(&item->ex_client->ref);
679 new->ex_client = item->ex_client;
680 new->ex_path.dentry = dget(item->ex_path.dentry);
681 new->ex_path.mnt = mntget(item->ex_path.mnt);
682 new->ex_pathname = NULL;
683 new->ex_fslocs.locations = NULL;
684 new->ex_fslocs.locations_count = 0;
685 new->ex_fslocs.migrated = 0;
686}
687
688static void export_update(struct cache_head *cnew, struct cache_head *citem)
689{
690 struct svc_export *new = container_of(cnew, struct svc_export, h);
691 struct svc_export *item = container_of(citem, struct svc_export, h);
692 int i;
693
694 new->ex_flags = item->ex_flags;
695 new->ex_anon_uid = item->ex_anon_uid;
696 new->ex_anon_gid = item->ex_anon_gid;
697 new->ex_fsid = item->ex_fsid;
698 new->ex_uuid = item->ex_uuid;
699 item->ex_uuid = NULL;
700 new->ex_pathname = item->ex_pathname;
701 item->ex_pathname = NULL;
702 new->ex_fslocs.locations = item->ex_fslocs.locations;
703 item->ex_fslocs.locations = NULL;
704 new->ex_fslocs.locations_count = item->ex_fslocs.locations_count;
705 item->ex_fslocs.locations_count = 0;
706 new->ex_fslocs.migrated = item->ex_fslocs.migrated;
707 item->ex_fslocs.migrated = 0;
708 new->ex_nflavors = item->ex_nflavors;
709 for (i = 0; i < MAX_SECINFO_LIST; i++) {
710 new->ex_flavors[i] = item->ex_flavors[i];
711 }
712}
713
714static struct cache_head *svc_export_alloc(void)
715{
716 struct svc_export *i = kmalloc(sizeof(*i), GFP_KERNEL);
717 if (i)
718 return &i->h;
719 else
720 return NULL;
721}
722
723struct cache_detail svc_export_cache = {
724 .owner = THIS_MODULE,
725 .hash_size = EXPORT_HASHMAX,
726 .hash_table = export_table,
727 .name = "nfsd.export",
728 .cache_put = svc_export_put,
729 .cache_upcall = svc_export_upcall,
730 .cache_parse = svc_export_parse,
731 .cache_show = svc_export_show,
732 .match = svc_export_match,
733 .init = svc_export_init,
734 .update = export_update,
735 .alloc = svc_export_alloc,
736};
737
738static int
739svc_export_hash(struct svc_export *exp)
740{
741 int hash;
742
743 hash = hash_ptr(exp->ex_client, EXPORT_HASHBITS);
744 hash ^= hash_ptr(exp->ex_path.dentry, EXPORT_HASHBITS);
745 hash ^= hash_ptr(exp->ex_path.mnt, EXPORT_HASHBITS);
746 return hash;
747}
748
749static struct svc_export *
750svc_export_lookup(struct svc_export *exp)
751{
752 struct cache_head *ch;
753 int hash = svc_export_hash(exp);
754
755 ch = sunrpc_cache_lookup(&svc_export_cache, &exp->h,
756 hash);
757 if (ch)
758 return container_of(ch, struct svc_export, h);
759 else
760 return NULL;
761}
762
763static struct svc_export *
764svc_export_update(struct svc_export *new, struct svc_export *old)
765{
766 struct cache_head *ch;
767 int hash = svc_export_hash(old);
768
769 ch = sunrpc_cache_update(&svc_export_cache, &new->h,
770 &old->h,
771 hash);
772 if (ch)
773 return container_of(ch, struct svc_export, h);
774 else
775 return NULL;
776}
777
778
779static struct svc_expkey *
780exp_find_key(svc_client *clp, int fsid_type, u32 *fsidv, struct cache_req *reqp)
781{
782 struct svc_expkey key, *ek;
783 int err;
784
785 if (!clp)
786 return ERR_PTR(-ENOENT);
787
788 key.ek_client = clp;
789 key.ek_fsidtype = fsid_type;
790 memcpy(key.ek_fsid, fsidv, key_len(fsid_type));
791
792 ek = svc_expkey_lookup(&key);
793 if (ek == NULL)
794 return ERR_PTR(-ENOMEM);
795 err = cache_check(&svc_expkey_cache, &ek->h, reqp);
796 if (err)
797 return ERR_PTR(err);
798 return ek;
799}
800
801#ifdef CONFIG_NFSD_DEPRECATED
802static int exp_set_key(svc_client *clp, int fsid_type, u32 *fsidv,
803 struct svc_export *exp)
804{
805 struct svc_expkey key, *ek;
806
807 key.ek_client = clp;
808 key.ek_fsidtype = fsid_type;
809 memcpy(key.ek_fsid, fsidv, key_len(fsid_type));
810 key.ek_path = exp->ex_path;
811 key.h.expiry_time = NEVER;
812 key.h.flags = 0;
813
814 ek = svc_expkey_lookup(&key);
815 if (ek)
816 ek = svc_expkey_update(&key,ek);
817 if (ek) {
818 cache_put(&ek->h, &svc_expkey_cache);
819 return 0;
820 }
821 return -ENOMEM;
822}
823
824
825
826
827static inline struct svc_expkey *
828exp_get_key(svc_client *clp, dev_t dev, ino_t ino)
829{
830 u32 fsidv[3];
831
832 if (old_valid_dev(dev)) {
833 mk_fsid(FSID_DEV, fsidv, dev, ino, 0, NULL);
834 return exp_find_key(clp, FSID_DEV, fsidv, NULL);
835 }
836 mk_fsid(FSID_ENCODE_DEV, fsidv, dev, ino, 0, NULL);
837 return exp_find_key(clp, FSID_ENCODE_DEV, fsidv, NULL);
838}
839
840
841
842
843static inline struct svc_expkey *
844exp_get_fsid_key(svc_client *clp, int fsid)
845{
846 u32 fsidv[2];
847
848 mk_fsid(FSID_NUM, fsidv, 0, 0, fsid, NULL);
849
850 return exp_find_key(clp, FSID_NUM, fsidv, NULL);
851}
852#endif
853
854static svc_export *exp_get_by_name(svc_client *clp, const struct path *path,
855 struct cache_req *reqp)
856{
857 struct svc_export *exp, key;
858 int err;
859
860 if (!clp)
861 return ERR_PTR(-ENOENT);
862
863 key.ex_client = clp;
864 key.ex_path = *path;
865
866 exp = svc_export_lookup(&key);
867 if (exp == NULL)
868 return ERR_PTR(-ENOMEM);
869 err = cache_check(&svc_export_cache, &exp->h, reqp);
870 if (err)
871 return ERR_PTR(err);
872 return exp;
873}
874
875
876
877
878static struct svc_export *exp_parent(svc_client *clp, struct path *path)
879{
880 struct dentry *saved = dget(path->dentry);
881 svc_export *exp = exp_get_by_name(clp, path, NULL);
882
883 while (PTR_ERR(exp) == -ENOENT && !IS_ROOT(path->dentry)) {
884 struct dentry *parent = dget_parent(path->dentry);
885 dput(path->dentry);
886 path->dentry = parent;
887 exp = exp_get_by_name(clp, path, NULL);
888 }
889 dput(path->dentry);
890 path->dentry = saved;
891 return exp;
892}
893
894#ifdef CONFIG_NFSD_DEPRECATED
895
896
897
898
899
900
901
902static DECLARE_RWSEM(hash_sem);
903
904void
905exp_readlock(void)
906{
907 down_read(&hash_sem);
908}
909
910static inline void
911exp_writelock(void)
912{
913 down_write(&hash_sem);
914}
915
916void
917exp_readunlock(void)
918{
919 up_read(&hash_sem);
920}
921
922static inline void
923exp_writeunlock(void)
924{
925 up_write(&hash_sem);
926}
927#else
928
929
930void exp_readlock(void) {}
931static inline void exp_writelock(void){}
932void exp_readunlock(void) {}
933static inline void exp_writeunlock(void){}
934
935#endif
936
937#ifdef CONFIG_NFSD_DEPRECATED
938static void exp_do_unexport(svc_export *unexp);
939static int exp_verify_string(char *cp, int max);
940
941static void exp_fsid_unhash(struct svc_export *exp)
942{
943 struct svc_expkey *ek;
944
945 if ((exp->ex_flags & NFSEXP_FSID) == 0)
946 return;
947
948 ek = exp_get_fsid_key(exp->ex_client, exp->ex_fsid);
949 if (!IS_ERR(ek)) {
950 sunrpc_invalidate(&ek->h, &svc_expkey_cache);
951 cache_put(&ek->h, &svc_expkey_cache);
952 }
953}
954
955static int exp_fsid_hash(svc_client *clp, struct svc_export *exp)
956{
957 u32 fsid[2];
958
959 if ((exp->ex_flags & NFSEXP_FSID) == 0)
960 return 0;
961
962 mk_fsid(FSID_NUM, fsid, 0, 0, exp->ex_fsid, NULL);
963 return exp_set_key(clp, FSID_NUM, fsid, exp);
964}
965
966static int exp_hash(struct auth_domain *clp, struct svc_export *exp)
967{
968 u32 fsid[2];
969 struct inode *inode = exp->ex_path.dentry->d_inode;
970 dev_t dev = inode->i_sb->s_dev;
971
972 if (old_valid_dev(dev)) {
973 mk_fsid(FSID_DEV, fsid, dev, inode->i_ino, 0, NULL);
974 return exp_set_key(clp, FSID_DEV, fsid, exp);
975 }
976 mk_fsid(FSID_ENCODE_DEV, fsid, dev, inode->i_ino, 0, NULL);
977 return exp_set_key(clp, FSID_ENCODE_DEV, fsid, exp);
978}
979
980static void exp_unhash(struct svc_export *exp)
981{
982 struct svc_expkey *ek;
983 struct inode *inode = exp->ex_path.dentry->d_inode;
984
985 ek = exp_get_key(exp->ex_client, inode->i_sb->s_dev, inode->i_ino);
986 if (!IS_ERR(ek)) {
987 sunrpc_invalidate(&ek->h, &svc_expkey_cache);
988 cache_put(&ek->h, &svc_expkey_cache);
989 }
990}
991
992
993
994
995int
996exp_export(struct nfsctl_export *nxp)
997{
998 svc_client *clp;
999 struct svc_export *exp = NULL;
1000 struct svc_export new;
1001 struct svc_expkey *fsid_key = NULL;
1002 struct path path;
1003 int err;
1004
1005
1006 err = -EINVAL;
1007 if (!exp_verify_string(nxp->ex_path, NFS_MAXPATHLEN) ||
1008 !exp_verify_string(nxp->ex_client, NFSCLNT_IDMAX))
1009 goto out;
1010
1011 dprintk("exp_export called for %s:%s (%x/%ld fl %x).\n",
1012 nxp->ex_client, nxp->ex_path,
1013 (unsigned)nxp->ex_dev, (long)nxp->ex_ino,
1014 nxp->ex_flags);
1015
1016
1017 exp_writelock();
1018
1019
1020 if (!(clp = auth_domain_find(nxp->ex_client)))
1021 goto out_unlock;
1022
1023
1024
1025 err = kern_path(nxp->ex_path, 0, &path);
1026 if (err)
1027 goto out_put_clp;
1028 err = -EINVAL;
1029
1030 exp = exp_get_by_name(clp, &path, NULL);
1031
1032 memset(&new, 0, sizeof(new));
1033
1034
1035 if ((nxp->ex_flags & NFSEXP_FSID) &&
1036 (!IS_ERR(fsid_key = exp_get_fsid_key(clp, nxp->ex_dev))) &&
1037 fsid_key->ek_path.mnt &&
1038 (fsid_key->ek_path.mnt != path.mnt ||
1039 fsid_key->ek_path.dentry != path.dentry))
1040 goto finish;
1041
1042 if (!IS_ERR(exp)) {
1043
1044
1045 exp_fsid_unhash(exp);
1046 exp->ex_flags = nxp->ex_flags;
1047 exp->ex_anon_uid = nxp->ex_anon_uid;
1048 exp->ex_anon_gid = nxp->ex_anon_gid;
1049 exp->ex_fsid = nxp->ex_dev;
1050
1051 err = exp_fsid_hash(clp, exp);
1052 goto finish;
1053 }
1054
1055 err = check_export(path.dentry->d_inode, &nxp->ex_flags, NULL);
1056 if (err) goto finish;
1057
1058 err = -ENOMEM;
1059
1060 dprintk("nfsd: creating export entry %p for client %p\n", exp, clp);
1061
1062 new.h.expiry_time = NEVER;
1063 new.h.flags = 0;
1064 new.ex_pathname = kstrdup(nxp->ex_path, GFP_KERNEL);
1065 if (!new.ex_pathname)
1066 goto finish;
1067 new.ex_client = clp;
1068 new.ex_path = path;
1069 new.ex_flags = nxp->ex_flags;
1070 new.ex_anon_uid = nxp->ex_anon_uid;
1071 new.ex_anon_gid = nxp->ex_anon_gid;
1072 new.ex_fsid = nxp->ex_dev;
1073
1074 exp = svc_export_lookup(&new);
1075 if (exp)
1076 exp = svc_export_update(&new, exp);
1077
1078 if (!exp)
1079 goto finish;
1080
1081 if (exp_hash(clp, exp) ||
1082 exp_fsid_hash(clp, exp)) {
1083
1084 exp_do_unexport(exp);
1085 cache_flush();
1086 } else
1087 err = 0;
1088finish:
1089 kfree(new.ex_pathname);
1090 if (!IS_ERR_OR_NULL(exp))
1091 exp_put(exp);
1092 if (!IS_ERR_OR_NULL(fsid_key))
1093 cache_put(&fsid_key->h, &svc_expkey_cache);
1094 path_put(&path);
1095out_put_clp:
1096 auth_domain_put(clp);
1097out_unlock:
1098 exp_writeunlock();
1099out:
1100 return err;
1101}
1102
1103
1104
1105
1106
1107static void
1108exp_do_unexport(svc_export *unexp)
1109{
1110 sunrpc_invalidate(&unexp->h, &svc_export_cache);
1111 exp_unhash(unexp);
1112 exp_fsid_unhash(unexp);
1113}
1114
1115
1116
1117
1118
1119int
1120exp_unexport(struct nfsctl_export *nxp)
1121{
1122 struct auth_domain *dom;
1123 svc_export *exp;
1124 struct path path;
1125 int err;
1126
1127
1128 if (!exp_verify_string(nxp->ex_path, NFS_MAXPATHLEN) ||
1129 !exp_verify_string(nxp->ex_client, NFSCLNT_IDMAX))
1130 return -EINVAL;
1131
1132 exp_writelock();
1133
1134 err = -EINVAL;
1135 dom = auth_domain_find(nxp->ex_client);
1136 if (!dom) {
1137 dprintk("nfsd: unexport couldn't find %s\n", nxp->ex_client);
1138 goto out_unlock;
1139 }
1140
1141 err = kern_path(nxp->ex_path, 0, &path);
1142 if (err)
1143 goto out_domain;
1144
1145 err = -EINVAL;
1146 exp = exp_get_by_name(dom, &path, NULL);
1147 path_put(&path);
1148 if (IS_ERR(exp))
1149 goto out_domain;
1150
1151 exp_do_unexport(exp);
1152 exp_put(exp);
1153 err = 0;
1154
1155out_domain:
1156 auth_domain_put(dom);
1157 cache_flush();
1158out_unlock:
1159 exp_writeunlock();
1160 return err;
1161}
1162#endif
1163
1164
1165
1166
1167
1168
1169int
1170exp_rootfh(svc_client *clp, char *name, struct knfsd_fh *f, int maxsize)
1171{
1172 struct svc_export *exp;
1173 struct path path;
1174 struct inode *inode;
1175 struct svc_fh fh;
1176 int err;
1177
1178 err = -EPERM;
1179
1180 if (kern_path(name, 0, &path)) {
1181 printk("nfsd: exp_rootfh path not found %s", name);
1182 return err;
1183 }
1184 inode = path.dentry->d_inode;
1185
1186 dprintk("nfsd: exp_rootfh(%s [%p] %s:%s/%ld)\n",
1187 name, path.dentry, clp->name,
1188 inode->i_sb->s_id, inode->i_ino);
1189 exp = exp_parent(clp, &path);
1190 if (IS_ERR(exp)) {
1191 err = PTR_ERR(exp);
1192 goto out;
1193 }
1194
1195
1196
1197
1198 fh_init(&fh, maxsize);
1199 if (fh_compose(&fh, exp, path.dentry, NULL))
1200 err = -EINVAL;
1201 else
1202 err = 0;
1203 memcpy(f, &fh.fh_handle, sizeof(struct knfsd_fh));
1204 fh_put(&fh);
1205 exp_put(exp);
1206out:
1207 path_put(&path);
1208 return err;
1209}
1210
1211static struct svc_export *exp_find(struct auth_domain *clp, int fsid_type,
1212 u32 *fsidv, struct cache_req *reqp)
1213{
1214 struct svc_export *exp;
1215 struct svc_expkey *ek = exp_find_key(clp, fsid_type, fsidv, reqp);
1216 if (IS_ERR(ek))
1217 return ERR_CAST(ek);
1218
1219 exp = exp_get_by_name(clp, &ek->ek_path, reqp);
1220 cache_put(&ek->h, &svc_expkey_cache);
1221
1222 if (IS_ERR(exp))
1223 return ERR_CAST(exp);
1224 return exp;
1225}
1226
1227__be32 check_nfsd_access(struct svc_export *exp, struct svc_rqst *rqstp)
1228{
1229 struct exp_flavor_info *f;
1230 struct exp_flavor_info *end = exp->ex_flavors + exp->ex_nflavors;
1231
1232
1233 if (exp->ex_client == rqstp->rq_gssclient)
1234 return 0;
1235
1236 for (f = exp->ex_flavors; f < end; f++) {
1237 if (f->pseudoflavor == rqstp->rq_flavor)
1238 return 0;
1239 }
1240
1241 if (exp->ex_nflavors == 0) {
1242 if (rqstp->rq_flavor == RPC_AUTH_NULL ||
1243 rqstp->rq_flavor == RPC_AUTH_UNIX)
1244 return 0;
1245 }
1246 return nfserr_wrongsec;
1247}
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258struct svc_export *
1259rqst_exp_get_by_name(struct svc_rqst *rqstp, struct path *path)
1260{
1261 struct svc_export *gssexp, *exp = ERR_PTR(-ENOENT);
1262
1263 if (rqstp->rq_client == NULL)
1264 goto gss;
1265
1266
1267 exp = exp_get_by_name(rqstp->rq_client, path, &rqstp->rq_chandle);
1268 if (PTR_ERR(exp) == -ENOENT)
1269 goto gss;
1270 if (IS_ERR(exp))
1271 return exp;
1272
1273 if (exp->ex_nflavors > 0)
1274 return exp;
1275gss:
1276
1277 if (rqstp->rq_gssclient == NULL)
1278 return exp;
1279 gssexp = exp_get_by_name(rqstp->rq_gssclient, path, &rqstp->rq_chandle);
1280 if (PTR_ERR(gssexp) == -ENOENT)
1281 return exp;
1282 if (!IS_ERR(exp))
1283 exp_put(exp);
1284 return gssexp;
1285}
1286
1287struct svc_export *
1288rqst_exp_find(struct svc_rqst *rqstp, int fsid_type, u32 *fsidv)
1289{
1290 struct svc_export *gssexp, *exp = ERR_PTR(-ENOENT);
1291
1292 if (rqstp->rq_client == NULL)
1293 goto gss;
1294
1295
1296 exp = exp_find(rqstp->rq_client, fsid_type, fsidv, &rqstp->rq_chandle);
1297 if (PTR_ERR(exp) == -ENOENT)
1298 goto gss;
1299 if (IS_ERR(exp))
1300 return exp;
1301
1302 if (exp->ex_nflavors > 0)
1303 return exp;
1304gss:
1305
1306 if (rqstp->rq_gssclient == NULL)
1307 return exp;
1308 gssexp = exp_find(rqstp->rq_gssclient, fsid_type, fsidv,
1309 &rqstp->rq_chandle);
1310 if (PTR_ERR(gssexp) == -ENOENT)
1311 return exp;
1312 if (!IS_ERR(exp))
1313 exp_put(exp);
1314 return gssexp;
1315}
1316
1317struct svc_export *
1318rqst_exp_parent(struct svc_rqst *rqstp, struct path *path)
1319{
1320 struct dentry *saved = dget(path->dentry);
1321 struct svc_export *exp = rqst_exp_get_by_name(rqstp, path);
1322
1323 while (PTR_ERR(exp) == -ENOENT && !IS_ROOT(path->dentry)) {
1324 struct dentry *parent = dget_parent(path->dentry);
1325 dput(path->dentry);
1326 path->dentry = parent;
1327 exp = rqst_exp_get_by_name(rqstp, path);
1328 }
1329 dput(path->dentry);
1330 path->dentry = saved;
1331 return exp;
1332}
1333
1334static struct svc_export *find_fsidzero_export(struct svc_rqst *rqstp)
1335{
1336 u32 fsidv[2];
1337
1338 mk_fsid(FSID_NUM, fsidv, 0, 0, 0, NULL);
1339
1340 return rqst_exp_find(rqstp, FSID_NUM, fsidv);
1341}
1342
1343
1344
1345
1346
1347
1348__be32
1349exp_pseudoroot(struct svc_rqst *rqstp, struct svc_fh *fhp)
1350{
1351 struct svc_export *exp;
1352 __be32 rv;
1353
1354 exp = find_fsidzero_export(rqstp);
1355 if (IS_ERR(exp))
1356 return nfserrno(PTR_ERR(exp));
1357 rv = fh_compose(fhp, exp, exp->ex_path.dentry, NULL);
1358 if (rv)
1359 goto out;
1360 rv = check_nfsd_access(exp, rqstp);
1361 if (rv)
1362 fh_put(fhp);
1363out:
1364 exp_put(exp);
1365 return rv;
1366}
1367
1368
1369
1370static void *e_start(struct seq_file *m, loff_t *pos)
1371 __acquires(svc_export_cache.hash_lock)
1372{
1373 loff_t n = *pos;
1374 unsigned hash, export;
1375 struct cache_head *ch;
1376
1377 exp_readlock();
1378 read_lock(&svc_export_cache.hash_lock);
1379 if (!n--)
1380 return SEQ_START_TOKEN;
1381 hash = n >> 32;
1382 export = n & ((1LL<<32) - 1);
1383
1384
1385 for (ch=export_table[hash]; ch; ch=ch->next)
1386 if (!export--)
1387 return ch;
1388 n &= ~((1LL<<32) - 1);
1389 do {
1390 hash++;
1391 n += 1LL<<32;
1392 } while(hash < EXPORT_HASHMAX && export_table[hash]==NULL);
1393 if (hash >= EXPORT_HASHMAX)
1394 return NULL;
1395 *pos = n+1;
1396 return export_table[hash];
1397}
1398
1399static void *e_next(struct seq_file *m, void *p, loff_t *pos)
1400{
1401 struct cache_head *ch = p;
1402 int hash = (*pos >> 32);
1403
1404 if (p == SEQ_START_TOKEN)
1405 hash = 0;
1406 else if (ch->next == NULL) {
1407 hash++;
1408 *pos += 1LL<<32;
1409 } else {
1410 ++*pos;
1411 return ch->next;
1412 }
1413 *pos &= ~((1LL<<32) - 1);
1414 while (hash < EXPORT_HASHMAX && export_table[hash] == NULL) {
1415 hash++;
1416 *pos += 1LL<<32;
1417 }
1418 if (hash >= EXPORT_HASHMAX)
1419 return NULL;
1420 ++*pos;
1421 return export_table[hash];
1422}
1423
1424static void e_stop(struct seq_file *m, void *p)
1425 __releases(svc_export_cache.hash_lock)
1426{
1427 read_unlock(&svc_export_cache.hash_lock);
1428 exp_readunlock();
1429}
1430
1431static struct flags {
1432 int flag;
1433 char *name[2];
1434} expflags[] = {
1435 { NFSEXP_READONLY, {"ro", "rw"}},
1436 { NFSEXP_INSECURE_PORT, {"insecure", ""}},
1437 { NFSEXP_ROOTSQUASH, {"root_squash", "no_root_squash"}},
1438 { NFSEXP_ALLSQUASH, {"all_squash", ""}},
1439 { NFSEXP_ASYNC, {"async", "sync"}},
1440 { NFSEXP_GATHERED_WRITES, {"wdelay", "no_wdelay"}},
1441 { NFSEXP_NOHIDE, {"nohide", ""}},
1442 { NFSEXP_CROSSMOUNT, {"crossmnt", ""}},
1443 { NFSEXP_NOSUBTREECHECK, {"no_subtree_check", ""}},
1444 { NFSEXP_NOAUTHNLM, {"insecure_locks", ""}},
1445 { NFSEXP_V4ROOT, {"v4root", ""}},
1446 { 0, {"", ""}}
1447};
1448
1449static void show_expflags(struct seq_file *m, int flags, int mask)
1450{
1451 struct flags *flg;
1452 int state, first = 0;
1453
1454 for (flg = expflags; flg->flag; flg++) {
1455 if (flg->flag & ~mask)
1456 continue;
1457 state = (flg->flag & flags) ? 0 : 1;
1458 if (*flg->name[state])
1459 seq_printf(m, "%s%s", first++?",":"", flg->name[state]);
1460 }
1461}
1462
1463static void show_secinfo_flags(struct seq_file *m, int flags)
1464{
1465 seq_printf(m, ",");
1466 show_expflags(m, flags, NFSEXP_SECINFO_FLAGS);
1467}
1468
1469static bool secinfo_flags_equal(int f, int g)
1470{
1471 f &= NFSEXP_SECINFO_FLAGS;
1472 g &= NFSEXP_SECINFO_FLAGS;
1473 return f == g;
1474}
1475
1476static int show_secinfo_run(struct seq_file *m, struct exp_flavor_info **fp, struct exp_flavor_info *end)
1477{
1478 int flags;
1479
1480 flags = (*fp)->flags;
1481 seq_printf(m, ",sec=%d", (*fp)->pseudoflavor);
1482 (*fp)++;
1483 while (*fp != end && secinfo_flags_equal(flags, (*fp)->flags)) {
1484 seq_printf(m, ":%d", (*fp)->pseudoflavor);
1485 (*fp)++;
1486 }
1487 return flags;
1488}
1489
1490static void show_secinfo(struct seq_file *m, struct svc_export *exp)
1491{
1492 struct exp_flavor_info *f;
1493 struct exp_flavor_info *end = exp->ex_flavors + exp->ex_nflavors;
1494 int flags;
1495
1496 if (exp->ex_nflavors == 0)
1497 return;
1498 f = exp->ex_flavors;
1499 flags = show_secinfo_run(m, &f, end);
1500 if (!secinfo_flags_equal(flags, exp->ex_flags))
1501 show_secinfo_flags(m, flags);
1502 while (f != end) {
1503 flags = show_secinfo_run(m, &f, end);
1504 show_secinfo_flags(m, flags);
1505 }
1506}
1507
1508static void exp_flags(struct seq_file *m, int flag, int fsid,
1509 uid_t anonu, uid_t anong, struct nfsd4_fs_locations *fsloc)
1510{
1511 show_expflags(m, flag, NFSEXP_ALLFLAGS);
1512 if (flag & NFSEXP_FSID)
1513 seq_printf(m, ",fsid=%d", fsid);
1514 if (anonu != (uid_t)-2 && anonu != (0x10000-2))
1515 seq_printf(m, ",anonuid=%u", anonu);
1516 if (anong != (gid_t)-2 && anong != (0x10000-2))
1517 seq_printf(m, ",anongid=%u", anong);
1518 if (fsloc && fsloc->locations_count > 0) {
1519 char *loctype = (fsloc->migrated) ? "refer" : "replicas";
1520 int i;
1521
1522 seq_printf(m, ",%s=", loctype);
1523 seq_escape(m, fsloc->locations[0].path, ",;@ \t\n\\");
1524 seq_putc(m, '@');
1525 seq_escape(m, fsloc->locations[0].hosts, ",;@ \t\n\\");
1526 for (i = 1; i < fsloc->locations_count; i++) {
1527 seq_putc(m, ';');
1528 seq_escape(m, fsloc->locations[i].path, ",;@ \t\n\\");
1529 seq_putc(m, '@');
1530 seq_escape(m, fsloc->locations[i].hosts, ",;@ \t\n\\");
1531 }
1532 }
1533}
1534
1535static int e_show(struct seq_file *m, void *p)
1536{
1537 struct cache_head *cp = p;
1538 struct svc_export *exp = container_of(cp, struct svc_export, h);
1539
1540 if (p == SEQ_START_TOKEN) {
1541 seq_puts(m, "# Version 1.1\n");
1542 seq_puts(m, "# Path Client(Flags) # IPs\n");
1543 return 0;
1544 }
1545
1546 cache_get(&exp->h);
1547 if (cache_check(&svc_export_cache, &exp->h, NULL))
1548 return 0;
1549 cache_put(&exp->h, &svc_export_cache);
1550 return svc_export_show(m, &svc_export_cache, cp);
1551}
1552
1553const struct seq_operations nfs_exports_op = {
1554 .start = e_start,
1555 .next = e_next,
1556 .stop = e_stop,
1557 .show = e_show,
1558};
1559
1560#ifdef CONFIG_NFSD_DEPRECATED
1561
1562
1563
1564
1565
1566int
1567exp_addclient(struct nfsctl_client *ncp)
1568{
1569 struct auth_domain *dom;
1570 int i, err;
1571 struct in6_addr addr6;
1572
1573
1574 err = -EINVAL;
1575 if (! exp_verify_string(ncp->cl_ident, NFSCLNT_IDMAX))
1576 goto out;
1577 if (ncp->cl_naddr > NFSCLNT_ADDRMAX)
1578 goto out;
1579
1580
1581 exp_writelock();
1582
1583 dom = unix_domain_find(ncp->cl_ident);
1584
1585 err = -ENOMEM;
1586 if (!dom)
1587 goto out_unlock;
1588
1589
1590 for (i = 0; i < ncp->cl_naddr; i++) {
1591 ipv6_addr_set_v4mapped(ncp->cl_addrlist[i].s_addr, &addr6);
1592 auth_unix_add_addr(&init_net, &addr6, dom);
1593 }
1594 auth_unix_forget_old(dom);
1595 auth_domain_put(dom);
1596
1597 err = 0;
1598
1599out_unlock:
1600 exp_writeunlock();
1601out:
1602 return err;
1603}
1604
1605
1606
1607
1608int
1609exp_delclient(struct nfsctl_client *ncp)
1610{
1611 int err;
1612 struct auth_domain *dom;
1613
1614 err = -EINVAL;
1615 if (!exp_verify_string(ncp->cl_ident, NFSCLNT_IDMAX))
1616 goto out;
1617
1618
1619 exp_writelock();
1620
1621 dom = auth_domain_find(ncp->cl_ident);
1622
1623
1624
1625 if (dom) {
1626 err = auth_unix_forget_old(dom);
1627 auth_domain_put(dom);
1628 }
1629
1630 exp_writeunlock();
1631out:
1632 return err;
1633}
1634
1635
1636
1637
1638static int
1639exp_verify_string(char *cp, int max)
1640{
1641 int i;
1642
1643 for (i = 0; i < max; i++)
1644 if (!cp[i])
1645 return i;
1646 cp[i] = 0;
1647 printk(KERN_NOTICE "nfsd: couldn't validate string %s\n", cp);
1648 return 0;
1649}
1650#endif
1651
1652
1653
1654
1655int
1656nfsd_export_init(void)
1657{
1658 int rv;
1659 dprintk("nfsd: initializing export module.\n");
1660
1661 rv = cache_register(&svc_export_cache);
1662 if (rv)
1663 return rv;
1664 rv = cache_register(&svc_expkey_cache);
1665 if (rv)
1666 cache_unregister(&svc_export_cache);
1667 return rv;
1668
1669}
1670
1671
1672
1673
1674void
1675nfsd_export_flush(void)
1676{
1677 exp_writelock();
1678 cache_purge(&svc_expkey_cache);
1679 cache_purge(&svc_export_cache);
1680 exp_writeunlock();
1681}
1682
1683
1684
1685
1686void
1687nfsd_export_shutdown(void)
1688{
1689
1690 dprintk("nfsd: shutting down export module.\n");
1691
1692 exp_writelock();
1693
1694 cache_unregister(&svc_expkey_cache);
1695 cache_unregister(&svc_export_cache);
1696 svcauth_unix_purge();
1697
1698 exp_writeunlock();
1699 dprintk("nfsd: export shutdown complete.\n");
1700}
1701