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16#include <linux/module.h>
17#include <linux/init.h>
18#include <linux/sched/signal.h>
19#include <linux/time.h>
20#include <linux/kernel.h>
21#include <linux/mm.h>
22#include <linux/string.h>
23#include <linux/stat.h>
24#include <linux/errno.h>
25#include <linux/unistd.h>
26#include <linux/sunrpc/clnt.h>
27#include <linux/sunrpc/stats.h>
28#include <linux/sunrpc/metrics.h>
29#include <linux/nfs_fs.h>
30#include <linux/nfs_mount.h>
31#include <linux/nfs4_mount.h>
32#include <linux/lockd/bind.h>
33#include <linux/seq_file.h>
34#include <linux/mount.h>
35#include <linux/vfs.h>
36#include <linux/inet.h>
37#include <linux/nfs_xdr.h>
38#include <linux/slab.h>
39#include <linux/compat.h>
40#include <linux/freezer.h>
41
42#include <linux/uaccess.h>
43
44#include "nfs4_fs.h"
45#include "callback.h"
46#include "delegation.h"
47#include "iostat.h"
48#include "internal.h"
49#include "fscache.h"
50#include "pnfs.h"
51#include "nfs.h"
52#include "netns.h"
53
54#include "nfstrace.h"
55
56#define NFSDBG_FACILITY NFSDBG_VFS
57
58#define NFS_64_BIT_INODE_NUMBERS_ENABLED 1
59
60
61static bool enable_ino64 = NFS_64_BIT_INODE_NUMBERS_ENABLED;
62
63static void nfs_invalidate_inode(struct inode *);
64static int nfs_update_inode(struct inode *, struct nfs_fattr *);
65
66static struct kmem_cache * nfs_inode_cachep;
67
68static inline unsigned long
69nfs_fattr_to_ino_t(struct nfs_fattr *fattr)
70{
71 return nfs_fileid_to_ino_t(fattr->fileid);
72}
73
74static int nfs_wait_killable(int mode)
75{
76 freezable_schedule_unsafe();
77 if (signal_pending_state(mode, current))
78 return -ERESTARTSYS;
79 return 0;
80}
81
82int nfs_wait_bit_killable(struct wait_bit_key *key, int mode)
83{
84 return nfs_wait_killable(mode);
85}
86EXPORT_SYMBOL_GPL(nfs_wait_bit_killable);
87
88int nfs_wait_atomic_killable(atomic_t *p)
89{
90 return nfs_wait_killable(TASK_KILLABLE);
91}
92
93
94
95
96
97
98
99
100u64 nfs_compat_user_ino64(u64 fileid)
101{
102#ifdef CONFIG_COMPAT
103 compat_ulong_t ino;
104#else
105 unsigned long ino;
106#endif
107
108 if (enable_ino64)
109 return fileid;
110 ino = fileid;
111 if (sizeof(ino) < sizeof(fileid))
112 ino ^= fileid >> (sizeof(fileid)-sizeof(ino)) * 8;
113 return ino;
114}
115
116int nfs_drop_inode(struct inode *inode)
117{
118 return NFS_STALE(inode) || generic_drop_inode(inode);
119}
120EXPORT_SYMBOL_GPL(nfs_drop_inode);
121
122void nfs_clear_inode(struct inode *inode)
123{
124
125
126
127 WARN_ON_ONCE(nfs_have_writebacks(inode));
128 WARN_ON_ONCE(!list_empty(&NFS_I(inode)->open_files));
129 nfs_zap_acl_cache(inode);
130 nfs_access_zap_cache(inode);
131 nfs_fscache_clear_inode(inode);
132}
133EXPORT_SYMBOL_GPL(nfs_clear_inode);
134
135void nfs_evict_inode(struct inode *inode)
136{
137 truncate_inode_pages_final(&inode->i_data);
138 clear_inode(inode);
139 nfs_clear_inode(inode);
140}
141
142int nfs_sync_inode(struct inode *inode)
143{
144 inode_dio_wait(inode);
145 return nfs_wb_all(inode);
146}
147EXPORT_SYMBOL_GPL(nfs_sync_inode);
148
149
150
151
152int nfs_sync_mapping(struct address_space *mapping)
153{
154 int ret = 0;
155
156 if (mapping->nrpages != 0) {
157 unmap_mapping_range(mapping, 0, 0, 0);
158 ret = nfs_wb_all(mapping->host);
159 }
160 return ret;
161}
162
163static int nfs_attribute_timeout(struct inode *inode)
164{
165 struct nfs_inode *nfsi = NFS_I(inode);
166
167 return !time_in_range_open(jiffies, nfsi->read_cache_jiffies, nfsi->read_cache_jiffies + nfsi->attrtimeo);
168}
169
170static bool nfs_check_cache_invalid_delegated(struct inode *inode, unsigned long flags)
171{
172 unsigned long cache_validity = READ_ONCE(NFS_I(inode)->cache_validity);
173
174
175 if (flags == NFS_INO_REVAL_PAGECACHE &&
176 !(cache_validity & NFS_INO_REVAL_FORCED))
177 return false;
178 return (cache_validity & flags) != 0;
179}
180
181static bool nfs_check_cache_invalid_not_delegated(struct inode *inode, unsigned long flags)
182{
183 unsigned long cache_validity = READ_ONCE(NFS_I(inode)->cache_validity);
184
185 if ((cache_validity & flags) != 0)
186 return true;
187 if (nfs_attribute_timeout(inode))
188 return true;
189 return false;
190}
191
192bool nfs_check_cache_invalid(struct inode *inode, unsigned long flags)
193{
194 if (NFS_PROTO(inode)->have_delegation(inode, FMODE_READ))
195 return nfs_check_cache_invalid_delegated(inode, flags);
196
197 return nfs_check_cache_invalid_not_delegated(inode, flags);
198}
199
200static void nfs_set_cache_invalid(struct inode *inode, unsigned long flags)
201{
202 struct nfs_inode *nfsi = NFS_I(inode);
203
204 if (inode->i_mapping->nrpages == 0)
205 flags &= ~NFS_INO_INVALID_DATA;
206 nfsi->cache_validity |= flags;
207 if (flags & NFS_INO_INVALID_DATA)
208 nfs_fscache_invalidate(inode);
209}
210
211
212
213
214static void nfs_zap_caches_locked(struct inode *inode)
215{
216 struct nfs_inode *nfsi = NFS_I(inode);
217 int mode = inode->i_mode;
218
219 nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE);
220
221 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
222 nfsi->attrtimeo_timestamp = jiffies;
223
224 memset(NFS_I(inode)->cookieverf, 0, sizeof(NFS_I(inode)->cookieverf));
225 if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) {
226 nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR
227 | NFS_INO_INVALID_DATA
228 | NFS_INO_INVALID_ACCESS
229 | NFS_INO_INVALID_ACL
230 | NFS_INO_REVAL_PAGECACHE);
231 } else
232 nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR
233 | NFS_INO_INVALID_ACCESS
234 | NFS_INO_INVALID_ACL
235 | NFS_INO_REVAL_PAGECACHE);
236 nfs_zap_label_cache_locked(nfsi);
237}
238
239void nfs_zap_caches(struct inode *inode)
240{
241 spin_lock(&inode->i_lock);
242 nfs_zap_caches_locked(inode);
243 spin_unlock(&inode->i_lock);
244}
245
246void nfs_zap_mapping(struct inode *inode, struct address_space *mapping)
247{
248 if (mapping->nrpages != 0) {
249 spin_lock(&inode->i_lock);
250 nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA);
251 spin_unlock(&inode->i_lock);
252 }
253}
254
255void nfs_zap_acl_cache(struct inode *inode)
256{
257 void (*clear_acl_cache)(struct inode *);
258
259 clear_acl_cache = NFS_PROTO(inode)->clear_acl_cache;
260 if (clear_acl_cache != NULL)
261 clear_acl_cache(inode);
262 spin_lock(&inode->i_lock);
263 NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_ACL;
264 spin_unlock(&inode->i_lock);
265}
266EXPORT_SYMBOL_GPL(nfs_zap_acl_cache);
267
268void nfs_invalidate_atime(struct inode *inode)
269{
270 spin_lock(&inode->i_lock);
271 nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATIME);
272 spin_unlock(&inode->i_lock);
273}
274EXPORT_SYMBOL_GPL(nfs_invalidate_atime);
275
276
277
278
279
280static void nfs_invalidate_inode(struct inode *inode)
281{
282 set_bit(NFS_INO_STALE, &NFS_I(inode)->flags);
283 nfs_zap_caches_locked(inode);
284}
285
286struct nfs_find_desc {
287 struct nfs_fh *fh;
288 struct nfs_fattr *fattr;
289};
290
291
292
293
294
295
296
297static int
298nfs_find_actor(struct inode *inode, void *opaque)
299{
300 struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque;
301 struct nfs_fh *fh = desc->fh;
302 struct nfs_fattr *fattr = desc->fattr;
303
304 if (NFS_FILEID(inode) != fattr->fileid)
305 return 0;
306 if ((S_IFMT & inode->i_mode) != (S_IFMT & fattr->mode))
307 return 0;
308 if (nfs_compare_fh(NFS_FH(inode), fh))
309 return 0;
310 if (is_bad_inode(inode) || NFS_STALE(inode))
311 return 0;
312 return 1;
313}
314
315static int
316nfs_init_locked(struct inode *inode, void *opaque)
317{
318 struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque;
319 struct nfs_fattr *fattr = desc->fattr;
320
321 set_nfs_fileid(inode, fattr->fileid);
322 inode->i_mode = fattr->mode;
323 nfs_copy_fh(NFS_FH(inode), desc->fh);
324 return 0;
325}
326
327#ifdef CONFIG_NFS_V4_SECURITY_LABEL
328static void nfs_clear_label_invalid(struct inode *inode)
329{
330 spin_lock(&inode->i_lock);
331 NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_LABEL;
332 spin_unlock(&inode->i_lock);
333}
334
335void nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr,
336 struct nfs4_label *label)
337{
338 int error;
339
340 if (label == NULL)
341 return;
342
343 if ((fattr->valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL) && inode->i_security) {
344 error = security_inode_notifysecctx(inode, label->label,
345 label->len);
346 if (error)
347 printk(KERN_ERR "%s() %s %d "
348 "security_inode_notifysecctx() %d\n",
349 __func__,
350 (char *)label->label,
351 label->len, error);
352 nfs_clear_label_invalid(inode);
353 }
354}
355
356struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags)
357{
358 struct nfs4_label *label = NULL;
359 int minor_version = server->nfs_client->cl_minorversion;
360
361 if (minor_version < 2)
362 return label;
363
364 if (!(server->caps & NFS_CAP_SECURITY_LABEL))
365 return label;
366
367 label = kzalloc(sizeof(struct nfs4_label), flags);
368 if (label == NULL)
369 return ERR_PTR(-ENOMEM);
370
371 label->label = kzalloc(NFS4_MAXLABELLEN, flags);
372 if (label->label == NULL) {
373 kfree(label);
374 return ERR_PTR(-ENOMEM);
375 }
376 label->len = NFS4_MAXLABELLEN;
377
378 return label;
379}
380EXPORT_SYMBOL_GPL(nfs4_label_alloc);
381#else
382void nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr,
383 struct nfs4_label *label)
384{
385}
386#endif
387EXPORT_SYMBOL_GPL(nfs_setsecurity);
388
389
390struct inode *
391nfs_ilookup(struct super_block *sb, struct nfs_fattr *fattr, struct nfs_fh *fh)
392{
393 struct nfs_find_desc desc = {
394 .fh = fh,
395 .fattr = fattr,
396 };
397 struct inode *inode;
398 unsigned long hash;
399
400 if (!(fattr->valid & NFS_ATTR_FATTR_FILEID) ||
401 !(fattr->valid & NFS_ATTR_FATTR_TYPE))
402 return NULL;
403
404 hash = nfs_fattr_to_ino_t(fattr);
405 inode = ilookup5(sb, hash, nfs_find_actor, &desc);
406
407 dprintk("%s: returning %p\n", __func__, inode);
408 return inode;
409}
410
411
412
413
414
415struct inode *
416nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr, struct nfs4_label *label)
417{
418 struct nfs_find_desc desc = {
419 .fh = fh,
420 .fattr = fattr
421 };
422 struct inode *inode = ERR_PTR(-ENOENT);
423 unsigned long hash;
424
425 nfs_attr_check_mountpoint(sb, fattr);
426
427 if (nfs_attr_use_mounted_on_fileid(fattr))
428 fattr->fileid = fattr->mounted_on_fileid;
429 else if ((fattr->valid & NFS_ATTR_FATTR_FILEID) == 0)
430 goto out_no_inode;
431 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) == 0)
432 goto out_no_inode;
433
434 hash = nfs_fattr_to_ino_t(fattr);
435
436 inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc);
437 if (inode == NULL) {
438 inode = ERR_PTR(-ENOMEM);
439 goto out_no_inode;
440 }
441
442 if (inode->i_state & I_NEW) {
443 struct nfs_inode *nfsi = NFS_I(inode);
444 unsigned long now = jiffies;
445
446
447
448 inode->i_ino = hash;
449
450
451 inode->i_flags |= S_NOATIME|S_NOCMTIME;
452 inode->i_mode = fattr->mode;
453 if ((fattr->valid & NFS_ATTR_FATTR_MODE) == 0
454 && nfs_server_capable(inode, NFS_CAP_MODE))
455 nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR);
456
457
458
459 inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->file_inode_ops;
460 if (S_ISREG(inode->i_mode)) {
461 inode->i_fop = NFS_SB(sb)->nfs_client->rpc_ops->file_ops;
462 inode->i_data.a_ops = &nfs_file_aops;
463 } else if (S_ISDIR(inode->i_mode)) {
464 inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->dir_inode_ops;
465 inode->i_fop = &nfs_dir_operations;
466 inode->i_data.a_ops = &nfs_dir_aops;
467
468 if (fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT ||
469 fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) {
470 if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)
471 inode->i_op = &nfs_referral_inode_operations;
472 else
473 inode->i_op = &nfs_mountpoint_inode_operations;
474 inode->i_fop = NULL;
475 inode->i_flags |= S_AUTOMOUNT;
476 }
477 } else if (S_ISLNK(inode->i_mode)) {
478 inode->i_op = &nfs_symlink_inode_operations;
479 inode_nohighmem(inode);
480 } else
481 init_special_inode(inode, inode->i_mode, fattr->rdev);
482
483 memset(&inode->i_atime, 0, sizeof(inode->i_atime));
484 memset(&inode->i_mtime, 0, sizeof(inode->i_mtime));
485 memset(&inode->i_ctime, 0, sizeof(inode->i_ctime));
486 inode->i_version = 0;
487 inode->i_size = 0;
488 clear_nlink(inode);
489 inode->i_uid = make_kuid(&init_user_ns, -2);
490 inode->i_gid = make_kgid(&init_user_ns, -2);
491 inode->i_blocks = 0;
492 memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf));
493 nfsi->write_io = 0;
494 nfsi->read_io = 0;
495
496 nfsi->read_cache_jiffies = fattr->time_start;
497 nfsi->attr_gencount = fattr->gencount;
498 if (fattr->valid & NFS_ATTR_FATTR_ATIME)
499 inode->i_atime = fattr->atime;
500 else if (nfs_server_capable(inode, NFS_CAP_ATIME))
501 nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR);
502 if (fattr->valid & NFS_ATTR_FATTR_MTIME)
503 inode->i_mtime = fattr->mtime;
504 else if (nfs_server_capable(inode, NFS_CAP_MTIME))
505 nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR);
506 if (fattr->valid & NFS_ATTR_FATTR_CTIME)
507 inode->i_ctime = fattr->ctime;
508 else if (nfs_server_capable(inode, NFS_CAP_CTIME))
509 nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR);
510 if (fattr->valid & NFS_ATTR_FATTR_CHANGE)
511 inode->i_version = fattr->change_attr;
512 else
513 nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR
514 | NFS_INO_REVAL_PAGECACHE);
515 if (fattr->valid & NFS_ATTR_FATTR_SIZE)
516 inode->i_size = nfs_size_to_loff_t(fattr->size);
517 else
518 nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR
519 | NFS_INO_REVAL_PAGECACHE);
520 if (fattr->valid & NFS_ATTR_FATTR_NLINK)
521 set_nlink(inode, fattr->nlink);
522 else if (nfs_server_capable(inode, NFS_CAP_NLINK))
523 nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR);
524 if (fattr->valid & NFS_ATTR_FATTR_OWNER)
525 inode->i_uid = fattr->uid;
526 else if (nfs_server_capable(inode, NFS_CAP_OWNER))
527 nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR);
528 if (fattr->valid & NFS_ATTR_FATTR_GROUP)
529 inode->i_gid = fattr->gid;
530 else if (nfs_server_capable(inode, NFS_CAP_OWNER_GROUP))
531 nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR);
532 if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED)
533 inode->i_blocks = fattr->du.nfs2.blocks;
534 if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) {
535
536
537
538 inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used);
539 }
540
541 nfs_setsecurity(inode, fattr, label);
542
543 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
544 nfsi->attrtimeo_timestamp = now;
545 nfsi->access_cache = RB_ROOT;
546
547 nfs_fscache_init_inode(inode);
548
549 unlock_new_inode(inode);
550 } else {
551 int err = nfs_refresh_inode(inode, fattr);
552 if (err < 0) {
553 iput(inode);
554 inode = ERR_PTR(err);
555 goto out_no_inode;
556 }
557 }
558 dprintk("NFS: nfs_fhget(%s/%Lu fh_crc=0x%08x ct=%d)\n",
559 inode->i_sb->s_id,
560 (unsigned long long)NFS_FILEID(inode),
561 nfs_display_fhandle_hash(fh),
562 atomic_read(&inode->i_count));
563
564out:
565 return inode;
566
567out_no_inode:
568 dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode));
569 goto out;
570}
571EXPORT_SYMBOL_GPL(nfs_fhget);
572
573#define NFS_VALID_ATTRS (ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_SIZE|ATTR_ATIME|ATTR_ATIME_SET|ATTR_MTIME|ATTR_MTIME_SET|ATTR_FILE|ATTR_OPEN)
574
575int
576nfs_setattr(struct dentry *dentry, struct iattr *attr)
577{
578 struct inode *inode = d_inode(dentry);
579 struct nfs_fattr *fattr;
580 int error = 0;
581
582 nfs_inc_stats(inode, NFSIOS_VFSSETATTR);
583
584
585 if (attr->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID))
586 attr->ia_valid &= ~ATTR_MODE;
587
588 if (attr->ia_valid & ATTR_SIZE) {
589 BUG_ON(!S_ISREG(inode->i_mode));
590
591 error = inode_newsize_ok(inode, attr->ia_size);
592 if (error)
593 return error;
594
595 if (attr->ia_size == i_size_read(inode))
596 attr->ia_valid &= ~ATTR_SIZE;
597 }
598
599
600 attr->ia_valid &= NFS_VALID_ATTRS;
601 if ((attr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
602 return 0;
603
604 trace_nfs_setattr_enter(inode);
605
606
607 if (S_ISREG(inode->i_mode))
608 nfs_sync_inode(inode);
609
610 fattr = nfs_alloc_fattr();
611 if (fattr == NULL) {
612 error = -ENOMEM;
613 goto out;
614 }
615
616
617
618
619 if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0)
620 NFS_PROTO(inode)->return_delegation(inode);
621 error = NFS_PROTO(inode)->setattr(dentry, fattr, attr);
622 if (error == 0)
623 error = nfs_refresh_inode(inode, fattr);
624 nfs_free_fattr(fattr);
625out:
626 trace_nfs_setattr_exit(inode, error);
627 return error;
628}
629EXPORT_SYMBOL_GPL(nfs_setattr);
630
631
632
633
634
635
636
637
638
639
640
641static int nfs_vmtruncate(struct inode * inode, loff_t offset)
642{
643 int err;
644
645 err = inode_newsize_ok(inode, offset);
646 if (err)
647 goto out;
648
649 i_size_write(inode, offset);
650
651 if (offset == 0)
652 NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_DATA;
653
654 spin_unlock(&inode->i_lock);
655 truncate_pagecache(inode, offset);
656 spin_lock(&inode->i_lock);
657out:
658 return err;
659}
660
661
662
663
664
665
666
667
668
669void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr,
670 struct nfs_fattr *fattr)
671{
672
673 nfs_fattr_set_barrier(fattr);
674
675 spin_lock(&inode->i_lock);
676 NFS_I(inode)->attr_gencount = fattr->gencount;
677 if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) {
678 if ((attr->ia_valid & ATTR_MODE) != 0) {
679 int mode = attr->ia_mode & S_IALLUGO;
680 mode |= inode->i_mode & ~S_IALLUGO;
681 inode->i_mode = mode;
682 }
683 if ((attr->ia_valid & ATTR_UID) != 0)
684 inode->i_uid = attr->ia_uid;
685 if ((attr->ia_valid & ATTR_GID) != 0)
686 inode->i_gid = attr->ia_gid;
687 nfs_set_cache_invalid(inode, NFS_INO_INVALID_ACCESS
688 | NFS_INO_INVALID_ACL);
689 }
690 if ((attr->ia_valid & ATTR_SIZE) != 0) {
691 nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC);
692 nfs_vmtruncate(inode, attr->ia_size);
693 }
694 if (fattr->valid)
695 nfs_update_inode(inode, fattr);
696 else
697 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
698 spin_unlock(&inode->i_lock);
699}
700EXPORT_SYMBOL_GPL(nfs_setattr_update_inode);
701
702static void nfs_readdirplus_parent_cache_miss(struct dentry *dentry)
703{
704 struct dentry *parent;
705
706 if (!nfs_server_capable(d_inode(dentry), NFS_CAP_READDIRPLUS))
707 return;
708 parent = dget_parent(dentry);
709 nfs_force_use_readdirplus(d_inode(parent));
710 dput(parent);
711}
712
713static void nfs_readdirplus_parent_cache_hit(struct dentry *dentry)
714{
715 struct dentry *parent;
716
717 if (!nfs_server_capable(d_inode(dentry), NFS_CAP_READDIRPLUS))
718 return;
719 parent = dget_parent(dentry);
720 nfs_advise_use_readdirplus(d_inode(parent));
721 dput(parent);
722}
723
724static bool nfs_need_revalidate_inode(struct inode *inode)
725{
726 if (NFS_I(inode)->cache_validity &
727 (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_LABEL))
728 return true;
729 if (nfs_attribute_cache_expired(inode))
730 return true;
731 return false;
732}
733
734int nfs_getattr(const struct path *path, struct kstat *stat,
735 u32 request_mask, unsigned int query_flags)
736{
737 struct inode *inode = d_inode(path->dentry);
738 int need_atime = NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATIME;
739 int err = 0;
740
741 trace_nfs_getattr_enter(inode);
742
743 if (S_ISREG(inode->i_mode)) {
744 err = filemap_write_and_wait(inode->i_mapping);
745 if (err)
746 goto out;
747 }
748
749
750
751
752
753
754
755
756
757
758 if ((path->mnt->mnt_flags & MNT_NOATIME) ||
759 ((path->mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode)))
760 need_atime = 0;
761
762 if (need_atime || nfs_need_revalidate_inode(inode)) {
763 struct nfs_server *server = NFS_SERVER(inode);
764
765 if (!(server->flags & NFS_MOUNT_NOAC))
766 nfs_readdirplus_parent_cache_miss(path->dentry);
767 else
768 nfs_readdirplus_parent_cache_hit(path->dentry);
769 err = __nfs_revalidate_inode(server, inode);
770 } else
771 nfs_readdirplus_parent_cache_hit(path->dentry);
772 if (!err) {
773 generic_fillattr(inode, stat);
774 stat->ino = nfs_compat_user_ino64(NFS_FILEID(inode));
775 if (S_ISDIR(inode->i_mode))
776 stat->blksize = NFS_SERVER(inode)->dtsize;
777 }
778out:
779 trace_nfs_getattr_exit(inode, err);
780 return err;
781}
782EXPORT_SYMBOL_GPL(nfs_getattr);
783
784static void nfs_init_lock_context(struct nfs_lock_context *l_ctx)
785{
786 atomic_set(&l_ctx->count, 1);
787 l_ctx->lockowner = current->files;
788 INIT_LIST_HEAD(&l_ctx->list);
789 atomic_set(&l_ctx->io_count, 0);
790}
791
792static struct nfs_lock_context *__nfs_find_lock_context(struct nfs_open_context *ctx)
793{
794 struct nfs_lock_context *head = &ctx->lock_context;
795 struct nfs_lock_context *pos = head;
796
797 do {
798 if (pos->lockowner != current->files)
799 continue;
800 atomic_inc(&pos->count);
801 return pos;
802 } while ((pos = list_entry(pos->list.next, typeof(*pos), list)) != head);
803 return NULL;
804}
805
806struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx)
807{
808 struct nfs_lock_context *res, *new = NULL;
809 struct inode *inode = d_inode(ctx->dentry);
810
811 spin_lock(&inode->i_lock);
812 res = __nfs_find_lock_context(ctx);
813 if (res == NULL) {
814 spin_unlock(&inode->i_lock);
815 new = kmalloc(sizeof(*new), GFP_KERNEL);
816 if (new == NULL)
817 return ERR_PTR(-ENOMEM);
818 nfs_init_lock_context(new);
819 spin_lock(&inode->i_lock);
820 res = __nfs_find_lock_context(ctx);
821 if (res == NULL) {
822 list_add_tail(&new->list, &ctx->lock_context.list);
823 new->open_context = ctx;
824 res = new;
825 new = NULL;
826 }
827 }
828 spin_unlock(&inode->i_lock);
829 kfree(new);
830 return res;
831}
832EXPORT_SYMBOL_GPL(nfs_get_lock_context);
833
834void nfs_put_lock_context(struct nfs_lock_context *l_ctx)
835{
836 struct nfs_open_context *ctx = l_ctx->open_context;
837 struct inode *inode = d_inode(ctx->dentry);
838
839 if (!atomic_dec_and_lock(&l_ctx->count, &inode->i_lock))
840 return;
841 list_del(&l_ctx->list);
842 spin_unlock(&inode->i_lock);
843 kfree(l_ctx);
844}
845EXPORT_SYMBOL_GPL(nfs_put_lock_context);
846
847
848
849
850
851
852
853
854
855
856void nfs_close_context(struct nfs_open_context *ctx, int is_sync)
857{
858 struct nfs_inode *nfsi;
859 struct inode *inode;
860 struct nfs_server *server;
861
862 if (!(ctx->mode & FMODE_WRITE))
863 return;
864 if (!is_sync)
865 return;
866 inode = d_inode(ctx->dentry);
867 if (NFS_PROTO(inode)->have_delegation(inode, FMODE_READ))
868 return;
869 nfsi = NFS_I(inode);
870 if (inode->i_mapping->nrpages == 0)
871 return;
872 if (nfsi->cache_validity & NFS_INO_INVALID_DATA)
873 return;
874 if (!list_empty(&nfsi->open_files))
875 return;
876 server = NFS_SERVER(inode);
877 if (server->flags & NFS_MOUNT_NOCTO)
878 return;
879 nfs_revalidate_inode(server, inode);
880}
881EXPORT_SYMBOL_GPL(nfs_close_context);
882
883struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry,
884 fmode_t f_mode,
885 struct file *filp)
886{
887 struct nfs_open_context *ctx;
888 struct rpc_cred *cred = rpc_lookup_cred();
889 if (IS_ERR(cred))
890 return ERR_CAST(cred);
891
892 ctx = kmalloc(sizeof(*ctx), GFP_KERNEL);
893 if (!ctx) {
894 put_rpccred(cred);
895 return ERR_PTR(-ENOMEM);
896 }
897 nfs_sb_active(dentry->d_sb);
898 ctx->dentry = dget(dentry);
899 ctx->cred = cred;
900 ctx->state = NULL;
901 ctx->mode = f_mode;
902 ctx->flags = 0;
903 ctx->error = 0;
904 ctx->flock_owner = (fl_owner_t)filp;
905 nfs_init_lock_context(&ctx->lock_context);
906 ctx->lock_context.open_context = ctx;
907 INIT_LIST_HEAD(&ctx->list);
908 ctx->mdsthreshold = NULL;
909 return ctx;
910}
911EXPORT_SYMBOL_GPL(alloc_nfs_open_context);
912
913struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx)
914{
915 if (ctx != NULL)
916 atomic_inc(&ctx->lock_context.count);
917 return ctx;
918}
919EXPORT_SYMBOL_GPL(get_nfs_open_context);
920
921static void __put_nfs_open_context(struct nfs_open_context *ctx, int is_sync)
922{
923 struct inode *inode = d_inode(ctx->dentry);
924 struct super_block *sb = ctx->dentry->d_sb;
925
926 if (!list_empty(&ctx->list)) {
927 if (!atomic_dec_and_lock(&ctx->lock_context.count, &inode->i_lock))
928 return;
929 list_del(&ctx->list);
930 spin_unlock(&inode->i_lock);
931 } else if (!atomic_dec_and_test(&ctx->lock_context.count))
932 return;
933 if (inode != NULL)
934 NFS_PROTO(inode)->close_context(ctx, is_sync);
935 if (ctx->cred != NULL)
936 put_rpccred(ctx->cred);
937 dput(ctx->dentry);
938 nfs_sb_deactive(sb);
939 kfree(ctx->mdsthreshold);
940 kfree(ctx);
941}
942
943void put_nfs_open_context(struct nfs_open_context *ctx)
944{
945 __put_nfs_open_context(ctx, 0);
946}
947EXPORT_SYMBOL_GPL(put_nfs_open_context);
948
949static void put_nfs_open_context_sync(struct nfs_open_context *ctx)
950{
951 __put_nfs_open_context(ctx, 1);
952}
953
954
955
956
957
958void nfs_inode_attach_open_context(struct nfs_open_context *ctx)
959{
960 struct inode *inode = d_inode(ctx->dentry);
961 struct nfs_inode *nfsi = NFS_I(inode);
962
963 spin_lock(&inode->i_lock);
964 if (ctx->mode & FMODE_WRITE)
965 list_add(&ctx->list, &nfsi->open_files);
966 else
967 list_add_tail(&ctx->list, &nfsi->open_files);
968 spin_unlock(&inode->i_lock);
969}
970EXPORT_SYMBOL_GPL(nfs_inode_attach_open_context);
971
972void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx)
973{
974 filp->private_data = get_nfs_open_context(ctx);
975 if (list_empty(&ctx->list))
976 nfs_inode_attach_open_context(ctx);
977}
978EXPORT_SYMBOL_GPL(nfs_file_set_open_context);
979
980
981
982
983struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, fmode_t mode)
984{
985 struct nfs_inode *nfsi = NFS_I(inode);
986 struct nfs_open_context *pos, *ctx = NULL;
987
988 spin_lock(&inode->i_lock);
989 list_for_each_entry(pos, &nfsi->open_files, list) {
990 if (cred != NULL && pos->cred != cred)
991 continue;
992 if ((pos->mode & (FMODE_READ|FMODE_WRITE)) != mode)
993 continue;
994 ctx = get_nfs_open_context(pos);
995 break;
996 }
997 spin_unlock(&inode->i_lock);
998 return ctx;
999}
1000
1001void nfs_file_clear_open_context(struct file *filp)
1002{
1003 struct nfs_open_context *ctx = nfs_file_open_context(filp);
1004
1005 if (ctx) {
1006 struct inode *inode = d_inode(ctx->dentry);
1007
1008
1009
1010
1011
1012 if (ctx->error < 0)
1013 invalidate_inode_pages2(inode->i_mapping);
1014 filp->private_data = NULL;
1015 spin_lock(&inode->i_lock);
1016 list_move_tail(&ctx->list, &NFS_I(inode)->open_files);
1017 spin_unlock(&inode->i_lock);
1018 put_nfs_open_context_sync(ctx);
1019 }
1020}
1021
1022
1023
1024
1025int nfs_open(struct inode *inode, struct file *filp)
1026{
1027 struct nfs_open_context *ctx;
1028
1029 ctx = alloc_nfs_open_context(file_dentry(filp), filp->f_mode, filp);
1030 if (IS_ERR(ctx))
1031 return PTR_ERR(ctx);
1032 nfs_file_set_open_context(filp, ctx);
1033 put_nfs_open_context(ctx);
1034 nfs_fscache_open_file(inode, filp);
1035 return 0;
1036}
1037
1038
1039
1040
1041
1042int
1043__nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
1044{
1045 int status = -ESTALE;
1046 struct nfs4_label *label = NULL;
1047 struct nfs_fattr *fattr = NULL;
1048 struct nfs_inode *nfsi = NFS_I(inode);
1049
1050 dfprintk(PAGECACHE, "NFS: revalidating (%s/%Lu)\n",
1051 inode->i_sb->s_id, (unsigned long long)NFS_FILEID(inode));
1052
1053 trace_nfs_revalidate_inode_enter(inode);
1054
1055 if (is_bad_inode(inode))
1056 goto out;
1057 if (NFS_STALE(inode))
1058 goto out;
1059
1060
1061 if (S_ISREG(inode->i_mode)) {
1062 status = pnfs_sync_inode(inode, false);
1063 if (status)
1064 goto out;
1065 }
1066
1067 status = -ENOMEM;
1068 fattr = nfs_alloc_fattr();
1069 if (fattr == NULL)
1070 goto out;
1071
1072 nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE);
1073
1074 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
1075 if (IS_ERR(label)) {
1076 status = PTR_ERR(label);
1077 goto out;
1078 }
1079
1080 status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), fattr, label);
1081 if (status != 0) {
1082 dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Lu) getattr failed, error=%d\n",
1083 inode->i_sb->s_id,
1084 (unsigned long long)NFS_FILEID(inode), status);
1085 if (status == -ESTALE) {
1086 nfs_zap_caches(inode);
1087 if (!S_ISDIR(inode->i_mode))
1088 set_bit(NFS_INO_STALE, &NFS_I(inode)->flags);
1089 }
1090 goto err_out;
1091 }
1092
1093 status = nfs_refresh_inode(inode, fattr);
1094 if (status) {
1095 dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Lu) refresh failed, error=%d\n",
1096 inode->i_sb->s_id,
1097 (unsigned long long)NFS_FILEID(inode), status);
1098 goto err_out;
1099 }
1100
1101 if (nfsi->cache_validity & NFS_INO_INVALID_ACL)
1102 nfs_zap_acl_cache(inode);
1103
1104 nfs_setsecurity(inode, fattr, label);
1105
1106 dfprintk(PAGECACHE, "NFS: (%s/%Lu) revalidation complete\n",
1107 inode->i_sb->s_id,
1108 (unsigned long long)NFS_FILEID(inode));
1109
1110err_out:
1111 nfs4_label_free(label);
1112out:
1113 nfs_free_fattr(fattr);
1114 trace_nfs_revalidate_inode_exit(inode, status);
1115 return status;
1116}
1117
1118int nfs_attribute_cache_expired(struct inode *inode)
1119{
1120 if (nfs_have_delegated_attributes(inode))
1121 return 0;
1122 return nfs_attribute_timeout(inode);
1123}
1124
1125
1126
1127
1128
1129
1130
1131
1132int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
1133{
1134 if (!nfs_need_revalidate_inode(inode))
1135 return NFS_STALE(inode) ? -ESTALE : 0;
1136 return __nfs_revalidate_inode(server, inode);
1137}
1138EXPORT_SYMBOL_GPL(nfs_revalidate_inode);
1139
1140static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping)
1141{
1142 struct nfs_inode *nfsi = NFS_I(inode);
1143 int ret;
1144
1145 if (mapping->nrpages != 0) {
1146 if (S_ISREG(inode->i_mode)) {
1147 unmap_mapping_range(mapping, 0, 0, 0);
1148 ret = nfs_sync_mapping(mapping);
1149 if (ret < 0)
1150 return ret;
1151 }
1152 ret = invalidate_inode_pages2(mapping);
1153 if (ret < 0)
1154 return ret;
1155 }
1156 if (S_ISDIR(inode->i_mode)) {
1157 spin_lock(&inode->i_lock);
1158 memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf));
1159 spin_unlock(&inode->i_lock);
1160 }
1161 nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE);
1162 nfs_fscache_wait_on_invalidate(inode);
1163
1164 dfprintk(PAGECACHE, "NFS: (%s/%Lu) data cache invalidated\n",
1165 inode->i_sb->s_id,
1166 (unsigned long long)NFS_FILEID(inode));
1167 return 0;
1168}
1169
1170bool nfs_mapping_need_revalidate_inode(struct inode *inode)
1171{
1172 return nfs_check_cache_invalid(inode, NFS_INO_REVAL_PAGECACHE) ||
1173 NFS_STALE(inode);
1174}
1175
1176int nfs_revalidate_mapping_rcu(struct inode *inode)
1177{
1178 struct nfs_inode *nfsi = NFS_I(inode);
1179 unsigned long *bitlock = &nfsi->flags;
1180 int ret = 0;
1181
1182 if (IS_SWAPFILE(inode))
1183 goto out;
1184 if (nfs_mapping_need_revalidate_inode(inode)) {
1185 ret = -ECHILD;
1186 goto out;
1187 }
1188 spin_lock(&inode->i_lock);
1189 if (test_bit(NFS_INO_INVALIDATING, bitlock) ||
1190 (nfsi->cache_validity & NFS_INO_INVALID_DATA))
1191 ret = -ECHILD;
1192 spin_unlock(&inode->i_lock);
1193out:
1194 return ret;
1195}
1196
1197
1198
1199
1200
1201
1202int nfs_revalidate_mapping(struct inode *inode,
1203 struct address_space *mapping)
1204{
1205 struct nfs_inode *nfsi = NFS_I(inode);
1206 unsigned long *bitlock = &nfsi->flags;
1207 int ret = 0;
1208
1209
1210 if (IS_SWAPFILE(inode))
1211 goto out;
1212
1213 if (nfs_mapping_need_revalidate_inode(inode)) {
1214 ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode);
1215 if (ret < 0)
1216 goto out;
1217 }
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231 for (;;) {
1232 ret = wait_on_bit_action(bitlock, NFS_INO_INVALIDATING,
1233 nfs_wait_bit_killable, TASK_KILLABLE);
1234 if (ret)
1235 goto out;
1236 spin_lock(&inode->i_lock);
1237 if (test_bit(NFS_INO_INVALIDATING, bitlock)) {
1238 spin_unlock(&inode->i_lock);
1239 continue;
1240 }
1241 if (nfsi->cache_validity & NFS_INO_INVALID_DATA)
1242 break;
1243 spin_unlock(&inode->i_lock);
1244 goto out;
1245 }
1246
1247 set_bit(NFS_INO_INVALIDATING, bitlock);
1248 smp_wmb();
1249 nfsi->cache_validity &= ~NFS_INO_INVALID_DATA;
1250 spin_unlock(&inode->i_lock);
1251 trace_nfs_invalidate_mapping_enter(inode);
1252 ret = nfs_invalidate_mapping(inode, mapping);
1253 trace_nfs_invalidate_mapping_exit(inode, ret);
1254
1255 clear_bit_unlock(NFS_INO_INVALIDATING, bitlock);
1256 smp_mb__after_atomic();
1257 wake_up_bit(bitlock, NFS_INO_INVALIDATING);
1258out:
1259 return ret;
1260}
1261
1262static bool nfs_file_has_writers(struct nfs_inode *nfsi)
1263{
1264 struct inode *inode = &nfsi->vfs_inode;
1265
1266 assert_spin_locked(&inode->i_lock);
1267
1268 if (!S_ISREG(inode->i_mode))
1269 return false;
1270 if (list_empty(&nfsi->open_files))
1271 return false;
1272
1273
1274
1275
1276 return (list_first_entry(&nfsi->open_files,
1277 struct nfs_open_context,
1278 list)->mode & FMODE_WRITE) == FMODE_WRITE;
1279}
1280
1281static bool nfs_file_has_buffered_writers(struct nfs_inode *nfsi)
1282{
1283 return nfs_file_has_writers(nfsi) && nfs_file_io_is_buffered(nfsi);
1284}
1285
1286static unsigned long nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1287{
1288 struct nfs_inode *nfsi = NFS_I(inode);
1289 unsigned long ret = 0;
1290
1291 if ((fattr->valid & NFS_ATTR_FATTR_PRECHANGE)
1292 && (fattr->valid & NFS_ATTR_FATTR_CHANGE)
1293 && inode->i_version == fattr->pre_change_attr) {
1294 inode->i_version = fattr->change_attr;
1295 if (S_ISDIR(inode->i_mode))
1296 nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA);
1297 ret |= NFS_INO_INVALID_ATTR;
1298 }
1299
1300 if ((fattr->valid & NFS_ATTR_FATTR_PRECTIME)
1301 && (fattr->valid & NFS_ATTR_FATTR_CTIME)
1302 && timespec_equal(&inode->i_ctime, &fattr->pre_ctime)) {
1303 memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime));
1304 ret |= NFS_INO_INVALID_ATTR;
1305 }
1306
1307 if ((fattr->valid & NFS_ATTR_FATTR_PREMTIME)
1308 && (fattr->valid & NFS_ATTR_FATTR_MTIME)
1309 && timespec_equal(&inode->i_mtime, &fattr->pre_mtime)) {
1310 memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime));
1311 if (S_ISDIR(inode->i_mode))
1312 nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA);
1313 ret |= NFS_INO_INVALID_ATTR;
1314 }
1315 if ((fattr->valid & NFS_ATTR_FATTR_PRESIZE)
1316 && (fattr->valid & NFS_ATTR_FATTR_SIZE)
1317 && i_size_read(inode) == nfs_size_to_loff_t(fattr->pre_size)
1318 && nfsi->nrequests == 0) {
1319 i_size_write(inode, nfs_size_to_loff_t(fattr->size));
1320 ret |= NFS_INO_INVALID_ATTR;
1321 }
1322
1323 return ret;
1324}
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr)
1336{
1337 struct nfs_inode *nfsi = NFS_I(inode);
1338 loff_t cur_size, new_isize;
1339 unsigned long invalid = 0;
1340
1341
1342 if (nfs_have_delegated_attributes(inode))
1343 return 0;
1344
1345 if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid)
1346 return -ESTALE;
1347 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT))
1348 return -ESTALE;
1349
1350 if (!nfs_file_has_buffered_writers(nfsi)) {
1351
1352 if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && inode->i_version != fattr->change_attr)
1353 invalid |= NFS_INO_INVALID_ATTR | NFS_INO_REVAL_PAGECACHE;
1354
1355 if ((fattr->valid & NFS_ATTR_FATTR_MTIME) && !timespec_equal(&inode->i_mtime, &fattr->mtime))
1356 invalid |= NFS_INO_INVALID_ATTR;
1357
1358 if ((fattr->valid & NFS_ATTR_FATTR_CTIME) && !timespec_equal(&inode->i_ctime, &fattr->ctime))
1359 invalid |= NFS_INO_INVALID_ATTR;
1360
1361 if (fattr->valid & NFS_ATTR_FATTR_SIZE) {
1362 cur_size = i_size_read(inode);
1363 new_isize = nfs_size_to_loff_t(fattr->size);
1364 if (cur_size != new_isize)
1365 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
1366 }
1367 }
1368
1369
1370 if ((fattr->valid & NFS_ATTR_FATTR_MODE) && (inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO))
1371 invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL;
1372 if ((fattr->valid & NFS_ATTR_FATTR_OWNER) && !uid_eq(inode->i_uid, fattr->uid))
1373 invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL;
1374 if ((fattr->valid & NFS_ATTR_FATTR_GROUP) && !gid_eq(inode->i_gid, fattr->gid))
1375 invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL;
1376
1377
1378 if ((fattr->valid & NFS_ATTR_FATTR_NLINK) && inode->i_nlink != fattr->nlink)
1379 invalid |= NFS_INO_INVALID_ATTR;
1380
1381 if ((fattr->valid & NFS_ATTR_FATTR_ATIME) && !timespec_equal(&inode->i_atime, &fattr->atime))
1382 invalid |= NFS_INO_INVALID_ATIME;
1383
1384 if (invalid != 0)
1385 nfs_set_cache_invalid(inode, invalid | NFS_INO_REVAL_FORCED);
1386
1387 nfsi->read_cache_jiffies = fattr->time_start;
1388 return 0;
1389}
1390
1391static atomic_long_t nfs_attr_generation_counter;
1392
1393static unsigned long nfs_read_attr_generation_counter(void)
1394{
1395 return atomic_long_read(&nfs_attr_generation_counter);
1396}
1397
1398unsigned long nfs_inc_attr_generation_counter(void)
1399{
1400 return atomic_long_inc_return(&nfs_attr_generation_counter);
1401}
1402EXPORT_SYMBOL_GPL(nfs_inc_attr_generation_counter);
1403
1404void nfs_fattr_init(struct nfs_fattr *fattr)
1405{
1406 fattr->valid = 0;
1407 fattr->time_start = jiffies;
1408 fattr->gencount = nfs_inc_attr_generation_counter();
1409 fattr->owner_name = NULL;
1410 fattr->group_name = NULL;
1411}
1412EXPORT_SYMBOL_GPL(nfs_fattr_init);
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425void nfs_fattr_set_barrier(struct nfs_fattr *fattr)
1426{
1427 fattr->gencount = nfs_inc_attr_generation_counter();
1428}
1429
1430struct nfs_fattr *nfs_alloc_fattr(void)
1431{
1432 struct nfs_fattr *fattr;
1433
1434 fattr = kmalloc(sizeof(*fattr), GFP_NOFS);
1435 if (fattr != NULL)
1436 nfs_fattr_init(fattr);
1437 return fattr;
1438}
1439EXPORT_SYMBOL_GPL(nfs_alloc_fattr);
1440
1441struct nfs_fh *nfs_alloc_fhandle(void)
1442{
1443 struct nfs_fh *fh;
1444
1445 fh = kmalloc(sizeof(struct nfs_fh), GFP_NOFS);
1446 if (fh != NULL)
1447 fh->size = 0;
1448 return fh;
1449}
1450EXPORT_SYMBOL_GPL(nfs_alloc_fhandle);
1451
1452#ifdef NFS_DEBUG
1453
1454
1455
1456
1457
1458
1459
1460
1461u32 _nfs_display_fhandle_hash(const struct nfs_fh *fh)
1462{
1463
1464
1465 return nfs_fhandle_hash(fh);
1466}
1467EXPORT_SYMBOL_GPL(_nfs_display_fhandle_hash);
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477void _nfs_display_fhandle(const struct nfs_fh *fh, const char *caption)
1478{
1479 unsigned short i;
1480
1481 if (fh == NULL || fh->size == 0) {
1482 printk(KERN_DEFAULT "%s at %p is empty\n", caption, fh);
1483 return;
1484 }
1485
1486 printk(KERN_DEFAULT "%s at %p is %u bytes, crc: 0x%08x:\n",
1487 caption, fh, fh->size, _nfs_display_fhandle_hash(fh));
1488 for (i = 0; i < fh->size; i += 16) {
1489 __be32 *pos = (__be32 *)&fh->data[i];
1490
1491 switch ((fh->size - i - 1) >> 2) {
1492 case 0:
1493 printk(KERN_DEFAULT " %08x\n",
1494 be32_to_cpup(pos));
1495 break;
1496 case 1:
1497 printk(KERN_DEFAULT " %08x %08x\n",
1498 be32_to_cpup(pos), be32_to_cpup(pos + 1));
1499 break;
1500 case 2:
1501 printk(KERN_DEFAULT " %08x %08x %08x\n",
1502 be32_to_cpup(pos), be32_to_cpup(pos + 1),
1503 be32_to_cpup(pos + 2));
1504 break;
1505 default:
1506 printk(KERN_DEFAULT " %08x %08x %08x %08x\n",
1507 be32_to_cpup(pos), be32_to_cpup(pos + 1),
1508 be32_to_cpup(pos + 2), be32_to_cpup(pos + 3));
1509 }
1510 }
1511}
1512EXPORT_SYMBOL_GPL(_nfs_display_fhandle);
1513#endif
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534static int nfs_inode_attrs_need_update(const struct inode *inode, const struct nfs_fattr *fattr)
1535{
1536 const struct nfs_inode *nfsi = NFS_I(inode);
1537
1538 return ((long)fattr->gencount - (long)nfsi->attr_gencount) > 0 ||
1539 ((long)nfsi->attr_gencount - (long)nfs_read_attr_generation_counter() > 0);
1540}
1541
1542static int nfs_refresh_inode_locked(struct inode *inode, struct nfs_fattr *fattr)
1543{
1544 int ret;
1545
1546 trace_nfs_refresh_inode_enter(inode);
1547
1548 if (nfs_inode_attrs_need_update(inode, fattr))
1549 ret = nfs_update_inode(inode, fattr);
1550 else
1551 ret = nfs_check_inode_attributes(inode, fattr);
1552
1553 trace_nfs_refresh_inode_exit(inode, ret);
1554 return ret;
1555}
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr)
1568{
1569 int status;
1570
1571 if ((fattr->valid & NFS_ATTR_FATTR) == 0)
1572 return 0;
1573 spin_lock(&inode->i_lock);
1574 status = nfs_refresh_inode_locked(inode, fattr);
1575 spin_unlock(&inode->i_lock);
1576
1577 return status;
1578}
1579EXPORT_SYMBOL_GPL(nfs_refresh_inode);
1580
1581static int nfs_post_op_update_inode_locked(struct inode *inode, struct nfs_fattr *fattr)
1582{
1583 unsigned long invalid = NFS_INO_INVALID_ATTR;
1584
1585 if (S_ISDIR(inode->i_mode))
1586 invalid |= NFS_INO_INVALID_DATA;
1587 nfs_set_cache_invalid(inode, invalid);
1588 if ((fattr->valid & NFS_ATTR_FATTR) == 0)
1589 return 0;
1590 return nfs_refresh_inode_locked(inode, fattr);
1591}
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1608{
1609 int status;
1610
1611 spin_lock(&inode->i_lock);
1612 nfs_fattr_set_barrier(fattr);
1613 status = nfs_post_op_update_inode_locked(inode, fattr);
1614 spin_unlock(&inode->i_lock);
1615
1616 return status;
1617}
1618EXPORT_SYMBOL_GPL(nfs_post_op_update_inode);
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631int nfs_post_op_update_inode_force_wcc_locked(struct inode *inode, struct nfs_fattr *fattr)
1632{
1633 int status;
1634
1635
1636 if ((fattr->valid & NFS_ATTR_FATTR) == 0 ||
1637 !nfs_inode_attrs_need_update(inode, fattr)) {
1638 fattr->valid &= ~(NFS_ATTR_FATTR_PRECHANGE
1639 | NFS_ATTR_FATTR_PRESIZE
1640 | NFS_ATTR_FATTR_PREMTIME
1641 | NFS_ATTR_FATTR_PRECTIME);
1642 goto out_noforce;
1643 }
1644 if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 &&
1645 (fattr->valid & NFS_ATTR_FATTR_PRECHANGE) == 0) {
1646 fattr->pre_change_attr = inode->i_version;
1647 fattr->valid |= NFS_ATTR_FATTR_PRECHANGE;
1648 }
1649 if ((fattr->valid & NFS_ATTR_FATTR_CTIME) != 0 &&
1650 (fattr->valid & NFS_ATTR_FATTR_PRECTIME) == 0) {
1651 memcpy(&fattr->pre_ctime, &inode->i_ctime, sizeof(fattr->pre_ctime));
1652 fattr->valid |= NFS_ATTR_FATTR_PRECTIME;
1653 }
1654 if ((fattr->valid & NFS_ATTR_FATTR_MTIME) != 0 &&
1655 (fattr->valid & NFS_ATTR_FATTR_PREMTIME) == 0) {
1656 memcpy(&fattr->pre_mtime, &inode->i_mtime, sizeof(fattr->pre_mtime));
1657 fattr->valid |= NFS_ATTR_FATTR_PREMTIME;
1658 }
1659 if ((fattr->valid & NFS_ATTR_FATTR_SIZE) != 0 &&
1660 (fattr->valid & NFS_ATTR_FATTR_PRESIZE) == 0) {
1661 fattr->pre_size = i_size_read(inode);
1662 fattr->valid |= NFS_ATTR_FATTR_PRESIZE;
1663 }
1664out_noforce:
1665 status = nfs_post_op_update_inode_locked(inode, fattr);
1666 return status;
1667}
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr)
1681{
1682 int status;
1683
1684 spin_lock(&inode->i_lock);
1685 nfs_fattr_set_barrier(fattr);
1686 status = nfs_post_op_update_inode_force_wcc_locked(inode, fattr);
1687 spin_unlock(&inode->i_lock);
1688 return status;
1689}
1690EXPORT_SYMBOL_GPL(nfs_post_op_update_inode_force_wcc);
1691
1692
1693static inline bool nfs_fileid_valid(struct nfs_inode *nfsi,
1694 struct nfs_fattr *fattr)
1695{
1696 bool ret1 = true, ret2 = true;
1697
1698 if (fattr->valid & NFS_ATTR_FATTR_FILEID)
1699 ret1 = (nfsi->fileid == fattr->fileid);
1700 if (fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
1701 ret2 = (nfsi->fileid == fattr->mounted_on_fileid);
1702 return ret1 || ret2;
1703}
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1718{
1719 struct nfs_server *server;
1720 struct nfs_inode *nfsi = NFS_I(inode);
1721 loff_t cur_isize, new_isize;
1722 unsigned long invalid = 0;
1723 unsigned long now = jiffies;
1724 unsigned long save_cache_validity;
1725 bool have_writers = nfs_file_has_buffered_writers(nfsi);
1726 bool cache_revalidated = true;
1727
1728 dfprintk(VFS, "NFS: %s(%s/%lu fh_crc=0x%08x ct=%d info=0x%x)\n",
1729 __func__, inode->i_sb->s_id, inode->i_ino,
1730 nfs_display_fhandle_hash(NFS_FH(inode)),
1731 atomic_read(&inode->i_count), fattr->valid);
1732
1733 if (!nfs_fileid_valid(nfsi, fattr)) {
1734 printk(KERN_ERR "NFS: server %s error: fileid changed\n"
1735 "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n",
1736 NFS_SERVER(inode)->nfs_client->cl_hostname,
1737 inode->i_sb->s_id, (long long)nfsi->fileid,
1738 (long long)fattr->fileid);
1739 goto out_err;
1740 }
1741
1742
1743
1744
1745 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) {
1746
1747
1748
1749 printk(KERN_DEBUG "NFS: %s: inode %lu mode changed, %07o to %07o\n",
1750 __func__, inode->i_ino, inode->i_mode, fattr->mode);
1751 goto out_err;
1752 }
1753
1754 server = NFS_SERVER(inode);
1755
1756 if (S_ISDIR(inode->i_mode) && (fattr->valid & NFS_ATTR_FATTR_FSID) &&
1757 !nfs_fsid_equal(&server->fsid, &fattr->fsid) &&
1758 !IS_AUTOMOUNT(inode))
1759 server->fsid = fattr->fsid;
1760
1761
1762
1763
1764 nfsi->read_cache_jiffies = fattr->time_start;
1765
1766 save_cache_validity = nfsi->cache_validity;
1767 nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR
1768 | NFS_INO_INVALID_ATIME
1769 | NFS_INO_REVAL_FORCED
1770 | NFS_INO_REVAL_PAGECACHE);
1771
1772
1773 invalid |= nfs_wcc_update_inode(inode, fattr);
1774
1775 if (pnfs_layoutcommit_outstanding(inode)) {
1776 nfsi->cache_validity |= save_cache_validity & NFS_INO_INVALID_ATTR;
1777 cache_revalidated = false;
1778 }
1779
1780
1781 if (fattr->valid & NFS_ATTR_FATTR_CHANGE) {
1782 if (inode->i_version != fattr->change_attr) {
1783 dprintk("NFS: change_attr change on server for file %s/%ld\n",
1784 inode->i_sb->s_id, inode->i_ino);
1785
1786 if (!have_writers) {
1787 invalid |= NFS_INO_INVALID_ATTR
1788 | NFS_INO_INVALID_DATA
1789 | NFS_INO_INVALID_ACCESS
1790 | NFS_INO_INVALID_ACL;
1791 if (S_ISDIR(inode->i_mode))
1792 nfs_force_lookup_revalidate(inode);
1793 }
1794 inode->i_version = fattr->change_attr;
1795 }
1796 } else {
1797 nfsi->cache_validity |= save_cache_validity;
1798 cache_revalidated = false;
1799 }
1800
1801 if (fattr->valid & NFS_ATTR_FATTR_MTIME) {
1802 memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime));
1803 } else if (server->caps & NFS_CAP_MTIME) {
1804 nfsi->cache_validity |= save_cache_validity &
1805 (NFS_INO_INVALID_ATTR
1806 | NFS_INO_REVAL_FORCED);
1807 cache_revalidated = false;
1808 }
1809
1810 if (fattr->valid & NFS_ATTR_FATTR_CTIME) {
1811 memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime));
1812 } else if (server->caps & NFS_CAP_CTIME) {
1813 nfsi->cache_validity |= save_cache_validity &
1814 (NFS_INO_INVALID_ATTR
1815 | NFS_INO_REVAL_FORCED);
1816 cache_revalidated = false;
1817 }
1818
1819
1820 if (fattr->valid & NFS_ATTR_FATTR_SIZE) {
1821 new_isize = nfs_size_to_loff_t(fattr->size);
1822 cur_isize = i_size_read(inode);
1823 if (new_isize != cur_isize) {
1824
1825
1826 if (nfsi->nrequests == 0 || new_isize > cur_isize) {
1827 i_size_write(inode, new_isize);
1828 if (!have_writers)
1829 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
1830 }
1831 dprintk("NFS: isize change on server for file %s/%ld "
1832 "(%Ld to %Ld)\n",
1833 inode->i_sb->s_id,
1834 inode->i_ino,
1835 (long long)cur_isize,
1836 (long long)new_isize);
1837 }
1838 } else {
1839 nfsi->cache_validity |= save_cache_validity &
1840 (NFS_INO_INVALID_ATTR
1841 | NFS_INO_REVAL_PAGECACHE
1842 | NFS_INO_REVAL_FORCED);
1843 cache_revalidated = false;
1844 }
1845
1846
1847 if (fattr->valid & NFS_ATTR_FATTR_ATIME)
1848 memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime));
1849 else if (server->caps & NFS_CAP_ATIME) {
1850 nfsi->cache_validity |= save_cache_validity &
1851 (NFS_INO_INVALID_ATIME
1852 | NFS_INO_REVAL_FORCED);
1853 cache_revalidated = false;
1854 }
1855
1856 if (fattr->valid & NFS_ATTR_FATTR_MODE) {
1857 if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) {
1858 umode_t newmode = inode->i_mode & S_IFMT;
1859 newmode |= fattr->mode & S_IALLUGO;
1860 inode->i_mode = newmode;
1861 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1862 }
1863 } else if (server->caps & NFS_CAP_MODE) {
1864 nfsi->cache_validity |= save_cache_validity &
1865 (NFS_INO_INVALID_ATTR
1866 | NFS_INO_INVALID_ACCESS
1867 | NFS_INO_INVALID_ACL
1868 | NFS_INO_REVAL_FORCED);
1869 cache_revalidated = false;
1870 }
1871
1872 if (fattr->valid & NFS_ATTR_FATTR_OWNER) {
1873 if (!uid_eq(inode->i_uid, fattr->uid)) {
1874 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1875 inode->i_uid = fattr->uid;
1876 }
1877 } else if (server->caps & NFS_CAP_OWNER) {
1878 nfsi->cache_validity |= save_cache_validity &
1879 (NFS_INO_INVALID_ATTR
1880 | NFS_INO_INVALID_ACCESS
1881 | NFS_INO_INVALID_ACL
1882 | NFS_INO_REVAL_FORCED);
1883 cache_revalidated = false;
1884 }
1885
1886 if (fattr->valid & NFS_ATTR_FATTR_GROUP) {
1887 if (!gid_eq(inode->i_gid, fattr->gid)) {
1888 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1889 inode->i_gid = fattr->gid;
1890 }
1891 } else if (server->caps & NFS_CAP_OWNER_GROUP) {
1892 nfsi->cache_validity |= save_cache_validity &
1893 (NFS_INO_INVALID_ATTR
1894 | NFS_INO_INVALID_ACCESS
1895 | NFS_INO_INVALID_ACL
1896 | NFS_INO_REVAL_FORCED);
1897 cache_revalidated = false;
1898 }
1899
1900 if (fattr->valid & NFS_ATTR_FATTR_NLINK) {
1901 if (inode->i_nlink != fattr->nlink) {
1902 invalid |= NFS_INO_INVALID_ATTR;
1903 if (S_ISDIR(inode->i_mode))
1904 invalid |= NFS_INO_INVALID_DATA;
1905 set_nlink(inode, fattr->nlink);
1906 }
1907 } else if (server->caps & NFS_CAP_NLINK) {
1908 nfsi->cache_validity |= save_cache_validity &
1909 (NFS_INO_INVALID_ATTR
1910 | NFS_INO_REVAL_FORCED);
1911 cache_revalidated = false;
1912 }
1913
1914 if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) {
1915
1916
1917
1918 inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used);
1919 } else if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED)
1920 inode->i_blocks = fattr->du.nfs2.blocks;
1921 else
1922 cache_revalidated = false;
1923
1924
1925 if (invalid & NFS_INO_INVALID_ATTR) {
1926 nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE);
1927 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
1928 nfsi->attrtimeo_timestamp = now;
1929
1930 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
1931 } else {
1932 if (cache_revalidated) {
1933 if (!time_in_range_open(now, nfsi->attrtimeo_timestamp,
1934 nfsi->attrtimeo_timestamp + nfsi->attrtimeo)) {
1935 nfsi->attrtimeo <<= 1;
1936 if (nfsi->attrtimeo > NFS_MAXATTRTIMEO(inode))
1937 nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode);
1938 }
1939 nfsi->attrtimeo_timestamp = now;
1940 }
1941
1942 if ((long)fattr->gencount - (long)nfsi->attr_gencount > 0)
1943 nfsi->attr_gencount = fattr->gencount;
1944 }
1945
1946
1947 if (cache_revalidated)
1948 invalid &= ~NFS_INO_INVALID_ATTR;
1949
1950
1951 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)
1952 || S_ISLNK(inode->i_mode)))
1953 invalid &= ~NFS_INO_INVALID_DATA;
1954 if (!NFS_PROTO(inode)->have_delegation(inode, FMODE_READ) ||
1955 (save_cache_validity & NFS_INO_REVAL_FORCED))
1956 nfs_set_cache_invalid(inode, invalid);
1957
1958 return 0;
1959 out_err:
1960
1961
1962
1963
1964
1965 nfs_invalidate_inode(inode);
1966 return -ESTALE;
1967}
1968
1969struct inode *nfs_alloc_inode(struct super_block *sb)
1970{
1971 struct nfs_inode *nfsi;
1972 nfsi = kmem_cache_alloc(nfs_inode_cachep, GFP_KERNEL);
1973 if (!nfsi)
1974 return NULL;
1975 nfsi->flags = 0UL;
1976 nfsi->cache_validity = 0UL;
1977#if IS_ENABLED(CONFIG_NFS_V4)
1978 nfsi->nfs4_acl = NULL;
1979#endif
1980 return &nfsi->vfs_inode;
1981}
1982EXPORT_SYMBOL_GPL(nfs_alloc_inode);
1983
1984static void nfs_i_callback(struct rcu_head *head)
1985{
1986 struct inode *inode = container_of(head, struct inode, i_rcu);
1987 kmem_cache_free(nfs_inode_cachep, NFS_I(inode));
1988}
1989
1990void nfs_destroy_inode(struct inode *inode)
1991{
1992 call_rcu(&inode->i_rcu, nfs_i_callback);
1993}
1994EXPORT_SYMBOL_GPL(nfs_destroy_inode);
1995
1996static inline void nfs4_init_once(struct nfs_inode *nfsi)
1997{
1998#if IS_ENABLED(CONFIG_NFS_V4)
1999 INIT_LIST_HEAD(&nfsi->open_states);
2000 nfsi->delegation = NULL;
2001 init_rwsem(&nfsi->rwsem);
2002 nfsi->layout = NULL;
2003#endif
2004}
2005
2006static void init_once(void *foo)
2007{
2008 struct nfs_inode *nfsi = (struct nfs_inode *) foo;
2009
2010 inode_init_once(&nfsi->vfs_inode);
2011 INIT_LIST_HEAD(&nfsi->open_files);
2012 INIT_LIST_HEAD(&nfsi->access_cache_entry_lru);
2013 INIT_LIST_HEAD(&nfsi->access_cache_inode_lru);
2014 INIT_LIST_HEAD(&nfsi->commit_info.list);
2015 nfsi->nrequests = 0;
2016 nfsi->commit_info.ncommit = 0;
2017 atomic_set(&nfsi->commit_info.rpcs_out, 0);
2018 init_rwsem(&nfsi->rmdir_sem);
2019 nfs4_init_once(nfsi);
2020}
2021
2022static int __init nfs_init_inodecache(void)
2023{
2024 nfs_inode_cachep = kmem_cache_create("nfs_inode_cache",
2025 sizeof(struct nfs_inode),
2026 0, (SLAB_RECLAIM_ACCOUNT|
2027 SLAB_MEM_SPREAD|SLAB_ACCOUNT),
2028 init_once);
2029 if (nfs_inode_cachep == NULL)
2030 return -ENOMEM;
2031
2032 return 0;
2033}
2034
2035static void nfs_destroy_inodecache(void)
2036{
2037
2038
2039
2040
2041 rcu_barrier();
2042 kmem_cache_destroy(nfs_inode_cachep);
2043}
2044
2045struct workqueue_struct *nfsiod_workqueue;
2046EXPORT_SYMBOL_GPL(nfsiod_workqueue);
2047
2048
2049
2050
2051static int nfsiod_start(void)
2052{
2053 struct workqueue_struct *wq;
2054 dprintk("RPC: creating workqueue nfsiod\n");
2055 wq = alloc_workqueue("nfsiod", WQ_MEM_RECLAIM, 0);
2056 if (wq == NULL)
2057 return -ENOMEM;
2058 nfsiod_workqueue = wq;
2059 return 0;
2060}
2061
2062
2063
2064
2065static void nfsiod_stop(void)
2066{
2067 struct workqueue_struct *wq;
2068
2069 wq = nfsiod_workqueue;
2070 if (wq == NULL)
2071 return;
2072 nfsiod_workqueue = NULL;
2073 destroy_workqueue(wq);
2074}
2075
2076unsigned int nfs_net_id;
2077EXPORT_SYMBOL_GPL(nfs_net_id);
2078
2079static int nfs_net_init(struct net *net)
2080{
2081 nfs_clients_init(net);
2082 return nfs_fs_proc_net_init(net);
2083}
2084
2085static void nfs_net_exit(struct net *net)
2086{
2087 nfs_fs_proc_net_exit(net);
2088 nfs_cleanup_cb_ident_idr(net);
2089}
2090
2091static struct pernet_operations nfs_net_ops = {
2092 .init = nfs_net_init,
2093 .exit = nfs_net_exit,
2094 .id = &nfs_net_id,
2095 .size = sizeof(struct nfs_net),
2096};
2097
2098
2099
2100
2101static int __init init_nfs_fs(void)
2102{
2103 int err;
2104
2105 err = register_pernet_subsys(&nfs_net_ops);
2106 if (err < 0)
2107 goto out9;
2108
2109 err = nfs_fscache_register();
2110 if (err < 0)
2111 goto out8;
2112
2113 err = nfsiod_start();
2114 if (err)
2115 goto out7;
2116
2117 err = nfs_fs_proc_init();
2118 if (err)
2119 goto out6;
2120
2121 err = nfs_init_nfspagecache();
2122 if (err)
2123 goto out5;
2124
2125 err = nfs_init_inodecache();
2126 if (err)
2127 goto out4;
2128
2129 err = nfs_init_readpagecache();
2130 if (err)
2131 goto out3;
2132
2133 err = nfs_init_writepagecache();
2134 if (err)
2135 goto out2;
2136
2137 err = nfs_init_directcache();
2138 if (err)
2139 goto out1;
2140
2141 rpc_proc_register(&init_net, &nfs_rpcstat);
2142
2143 err = register_nfs_fs();
2144 if (err)
2145 goto out0;
2146
2147 return 0;
2148out0:
2149 rpc_proc_unregister(&init_net, "nfs");
2150 nfs_destroy_directcache();
2151out1:
2152 nfs_destroy_writepagecache();
2153out2:
2154 nfs_destroy_readpagecache();
2155out3:
2156 nfs_destroy_inodecache();
2157out4:
2158 nfs_destroy_nfspagecache();
2159out5:
2160 nfs_fs_proc_exit();
2161out6:
2162 nfsiod_stop();
2163out7:
2164 nfs_fscache_unregister();
2165out8:
2166 unregister_pernet_subsys(&nfs_net_ops);
2167out9:
2168 return err;
2169}
2170
2171static void __exit exit_nfs_fs(void)
2172{
2173 nfs_destroy_directcache();
2174 nfs_destroy_writepagecache();
2175 nfs_destroy_readpagecache();
2176 nfs_destroy_inodecache();
2177 nfs_destroy_nfspagecache();
2178 nfs_fscache_unregister();
2179 unregister_pernet_subsys(&nfs_net_ops);
2180 rpc_proc_unregister(&init_net, "nfs");
2181 unregister_nfs_fs();
2182 nfs_fs_proc_exit();
2183 nfsiod_stop();
2184}
2185
2186
2187MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
2188MODULE_LICENSE("GPL");
2189module_param(enable_ino64, bool, 0644);
2190
2191module_init(init_nfs_fs)
2192module_exit(exit_nfs_fs)
2193