1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
|
/* SPDX-License-Identifier: GPL-2.0 */
/*
* NFS internal definitions
*/
#include "nfs4_fs.h"
#include <linux/fs_context.h>
#include <linux/security.h>
#include <linux/crc32.h>
#include <linux/sunrpc/addr.h>
#include <linux/nfs_page.h>
#include <linux/wait_bit.h>
#define NFS_SB_MASK (SB_RDONLY|SB_NOSUID|SB_NODEV|SB_NOEXEC|SB_SYNCHRONOUS)
extern const struct export_operations nfs_export_ops;
struct nfs_string;
struct nfs_pageio_descriptor;
static inline void nfs_attr_check_mountpoint(struct super_block *parent, struct nfs_fattr *fattr)
{
if (!nfs_fsid_equal(&NFS_SB(parent)->fsid, &fattr->fsid))
fattr->valid |= NFS_ATTR_FATTR_MOUNTPOINT;
}
static inline int nfs_attr_use_mounted_on_fileid(struct nfs_fattr *fattr)
{
if (((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) == 0) ||
(((fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT) == 0) &&
((fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) == 0)))
return 0;
return 1;
}
static inline bool nfs_lookup_is_soft_revalidate(const struct dentry *dentry)
{
if (!(NFS_SB(dentry->d_sb)->flags & NFS_MOUNT_SOFTREVAL))
return false;
if (!d_is_positive(dentry) || !NFS_FH(d_inode(dentry))->size)
return false;
return true;
}
static inline fmode_t flags_to_mode(int flags)
{
fmode_t res = (__force fmode_t)flags & FMODE_EXEC;
if ((flags & O_ACCMODE) != O_WRONLY)
res |= FMODE_READ;
if ((flags & O_ACCMODE) != O_RDONLY)
res |= FMODE_WRITE;
return res;
}
/*
* Note: RFC 1813 doesn't limit the number of auth flavors that
* a server can return, so make something up.
*/
#define NFS_MAX_SECFLAVORS (12)
/*
* Value used if the user did not specify a port value.
*/
#define NFS_UNSPEC_PORT (-1)
#define NFS_UNSPEC_RETRANS (UINT_MAX)
#define NFS_UNSPEC_TIMEO (UINT_MAX)
struct nfs_client_initdata {
unsigned long init_flags;
const char *hostname; /* Hostname of the server */
const struct sockaddr *addr; /* Address of the server */
const char *nodename; /* Hostname of the client */
const char *ip_addr; /* IP address of the client */
size_t addrlen;
struct nfs_subversion *nfs_mod;
int proto;
u32 minorversion;
unsigned int nconnect;
unsigned int max_connect;
struct net *net;
const struct rpc_timeout *timeparms;
const struct cred *cred;
};
/*
* In-kernel mount arguments
*/
struct nfs_fs_context {
bool internal;
bool skip_reconfig_option_check;
bool need_mount;
bool sloppy;
unsigned int flags; /* NFS{,4}_MOUNT_* flags */
unsigned int rsize, wsize;
unsigned int timeo, retrans;
unsigned int acregmin, acregmax;
unsigned int acdirmin, acdirmax;
unsigned int namlen;
unsigned int options;
unsigned int bsize;
struct nfs_auth_info auth_info;
rpc_authflavor_t selected_flavor;
char *client_address;
unsigned int version;
unsigned int minorversion;
char *fscache_uniq;
unsigned short protofamily;
unsigned short mountfamily;
bool has_sec_mnt_opts;
struct {
union {
struct sockaddr address;
struct sockaddr_storage _address;
};
size_t addrlen;
char *hostname;
u32 version;
int port;
unsigned short protocol;
} mount_server;
struct {
union {
struct sockaddr address;
struct sockaddr_storage _address;
};
size_t addrlen;
char *hostname;
char *export_path;
int port;
unsigned short protocol;
unsigned short nconnect;
unsigned short max_connect;
unsigned short export_path_len;
} nfs_server;
struct nfs_fh *mntfh;
struct nfs_server *server;
struct nfs_subversion *nfs_mod;
/* Information for a cloned mount. */
struct nfs_clone_mount {
struct super_block *sb;
struct dentry *dentry;
struct nfs_fattr *fattr;
unsigned int inherited_bsize;
} clone_data;
};
#define nfs_errorf(fc, fmt, ...) ((fc)->log.log ? \
errorf(fc, fmt, ## __VA_ARGS__) : \
({ dprintk(fmt "\n", ## __VA_ARGS__); }))
#define nfs_ferrorf(fc, fac, fmt, ...) ((fc)->log.log ? \
errorf(fc, fmt, ## __VA_ARGS__) : \
({ dfprintk(fac, fmt "\n", ## __VA_ARGS__); }))
#define nfs_invalf(fc, fmt, ...) ((fc)->log.log ? \
invalf(fc, fmt, ## __VA_ARGS__) : \
({ dprintk(fmt "\n", ## __VA_ARGS__); -EINVAL; }))
#define nfs_finvalf(fc, fac, fmt, ...) ((fc)->log.log ? \
invalf(fc, fmt, ## __VA_ARGS__) : \
({ dfprintk(fac, fmt "\n", ## __VA_ARGS__); -EINVAL; }))
#define nfs_warnf(fc, fmt, ...) ((fc)->log.log ? \
warnf(fc, fmt, ## __VA_ARGS__) : \
({ dprintk(fmt "\n", ## __VA_ARGS__); }))
#define nfs_fwarnf(fc, fac, fmt, ...) ((fc)->log.log ? \
warnf(fc, fmt, ## __VA_ARGS__) : \
({ dfprintk(fac, fmt "\n", ## __VA_ARGS__); }))
static inline struct nfs_fs_context *nfs_fc2context(const struct fs_context *fc)
{
return fc->fs_private;
}
/* mount_clnt.c */
struct nfs_mount_request {
struct sockaddr *sap;
size_t salen;
char *hostname;
char *dirpath;
u32 version;
unsigned short protocol;
struct nfs_fh *fh;
int noresvport;
unsigned int *auth_flav_len;
rpc_authflavor_t *auth_flavs;
struct net *net;
};
extern int nfs_mount(struct nfs_mount_request *info, int timeo, int retrans);
extern void nfs_umount(const struct nfs_mount_request *info);
/* client.c */
extern const struct rpc_program nfs_program;
extern void nfs_clients_init(struct net *net);
extern void nfs_clients_exit(struct net *net);
extern struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *);
int nfs_create_rpc_client(struct nfs_client *, const struct nfs_client_initdata *, rpc_authflavor_t);
struct nfs_client *nfs_get_client(const struct nfs_client_initdata *);
int nfs_probe_server(struct nfs_server *, struct nfs_fh *);
void nfs_server_insert_lists(struct nfs_server *);
void nfs_server_remove_lists(struct nfs_server *);
void nfs_init_timeout_values(struct rpc_timeout *to, int proto, int timeo, int retrans);
int nfs_init_server_rpcclient(struct nfs_server *, const struct rpc_timeout *t,
rpc_authflavor_t);
struct nfs_server *nfs_alloc_server(void);
void nfs_server_copy_userdata(struct nfs_server *, struct nfs_server *);
extern void nfs_put_client(struct nfs_client *);
extern void nfs_free_client(struct nfs_client *);
extern struct nfs_client *nfs4_find_client_ident(struct net *, int);
extern struct nfs_client *
nfs4_find_client_sessionid(struct net *, const struct sockaddr *,
struct nfs4_sessionid *, u32);
extern struct nfs_server *nfs_create_server(struct fs_context *);
extern void nfs4_server_set_init_caps(struct nfs_server *);
extern struct nfs_server *nfs4_create_server(struct fs_context *);
extern struct nfs_server *nfs4_create_referral_server(struct fs_context *);
extern int nfs4_update_server(struct nfs_server *server, const char *hostname,
struct sockaddr *sap, size_t salen,
struct net *net);
extern void nfs_free_server(struct nfs_server *server);
extern struct nfs_server *nfs_clone_server(struct nfs_server *,
struct nfs_fh *,
struct nfs_fattr *,
rpc_authflavor_t);
extern bool nfs_client_init_is_complete(const struct nfs_client *clp);
extern int nfs_client_init_status(const struct nfs_client *clp);
extern int nfs_wait_client_init_complete(const struct nfs_client *clp);
extern void nfs_mark_client_ready(struct nfs_client *clp, int state);
extern struct nfs_client *nfs4_set_ds_client(struct nfs_server *mds_srv,
const struct sockaddr *ds_addr,
int ds_addrlen, int ds_proto,
unsigned int ds_timeo,
unsigned int ds_retrans,
u32 minor_version);
extern struct rpc_clnt *nfs4_find_or_create_ds_client(struct nfs_client *,
struct inode *);
extern struct nfs_client *nfs3_set_ds_client(struct nfs_server *mds_srv,
const struct sockaddr *ds_addr, int ds_addrlen,
int ds_proto, unsigned int ds_timeo,
unsigned int ds_retrans);
#ifdef CONFIG_PROC_FS
extern int __init nfs_fs_proc_init(void);
extern void nfs_fs_proc_exit(void);
extern int nfs_fs_proc_net_init(struct net *net);
extern void nfs_fs_proc_net_exit(struct net *net);
#else
static inline int nfs_fs_proc_net_init(struct net *net)
{
return 0;
}
static inline void nfs_fs_proc_net_exit(struct net *net)
{
}
static inline int nfs_fs_proc_init(void)
{
return 0;
}
static inline void nfs_fs_proc_exit(void)
{
}
#endif
/* callback_xdr.c */
extern const struct svc_version nfs4_callback_version1;
extern const struct svc_version nfs4_callback_version4;
/* fs_context.c */
extern struct file_system_type nfs_fs_type;
/* pagelist.c */
extern int __init nfs_init_nfspagecache(void);
extern void nfs_destroy_nfspagecache(void);
extern int __init nfs_init_readpagecache(void);
extern void nfs_destroy_readpagecache(void);
extern int __init nfs_init_writepagecache(void);
extern void nfs_destroy_writepagecache(void);
extern int __init nfs_init_directcache(void);
extern void nfs_destroy_directcache(void);
extern void nfs_pgheader_init(struct nfs_pageio_descriptor *desc,
struct nfs_pgio_header *hdr,
void (*release)(struct nfs_pgio_header *hdr));
void nfs_set_pgio_error(struct nfs_pgio_header *hdr, int error, loff_t pos);
int nfs_iocounter_wait(struct nfs_lock_context *l_ctx);
extern const struct nfs_pageio_ops nfs_pgio_rw_ops;
struct nfs_pgio_header *nfs_pgio_header_alloc(const struct nfs_rw_ops *);
void nfs_pgio_header_free(struct nfs_pgio_header *);
int nfs_generic_pgio(struct nfs_pageio_descriptor *, struct nfs_pgio_header *);
int nfs_initiate_pgio(struct rpc_clnt *clnt, struct nfs_pgio_header *hdr,
const struct cred *cred, const struct nfs_rpc_ops *rpc_ops,
const struct rpc_call_ops *call_ops, int how, int flags);
void nfs_free_request(struct nfs_page *req);
struct nfs_pgio_mirror *
nfs_pgio_current_mirror(struct nfs_pageio_descriptor *desc);
static inline bool nfs_match_open_context(const struct nfs_open_context *ctx1,
const struct nfs_open_context *ctx2)
{
return cred_fscmp(ctx1->cred, ctx2->cred) == 0 && ctx1->state == ctx2->state;
}
/* nfs2xdr.c */
extern const struct rpc_procinfo nfs_procedures[];
extern int nfs2_decode_dirent(struct xdr_stream *,
struct nfs_entry *, bool);
/* nfs3xdr.c */
extern const struct rpc_procinfo nfs3_procedures[];
extern int nfs3_decode_dirent(struct xdr_stream *,
struct nfs_entry *, bool);
/* nfs4xdr.c */
#if IS_ENABLED(CONFIG_NFS_V4)
extern int nfs4_decode_dirent(struct xdr_stream *,
struct nfs_entry *, bool);
#endif
#ifdef CONFIG_NFS_V4_1
extern const u32 nfs41_maxread_overhead;
extern const u32 nfs41_maxwrite_overhead;
extern const u32 nfs41_maxgetdevinfo_overhead;
#endif
/* nfs4proc.c */
#if IS_ENABLED(CONFIG_NFS_V4)
extern const struct rpc_procinfo nfs4_procedures[];
#endif
#ifdef CONFIG_NFS_V4_SECURITY_LABEL
extern struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags);
static inline struct nfs4_label *
nfs4_label_copy(struct nfs4_label *dst, struct nfs4_label *src)
{
if (!dst || !src)
return NULL;
if (src->len > NFS4_MAXLABELLEN)
return NULL;
dst->lfs = src->lfs;
dst->pi = src->pi;
dst->len = src->len;
memcpy(dst->label, src->label, src->len);
return dst;
}
static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi)
{
if (nfs_server_capable(&nfsi->vfs_inode, NFS_CAP_SECURITY_LABEL))
nfsi->cache_validity |= NFS_INO_INVALID_LABEL;
}
#else
static inline struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags) { return NULL; }
static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi)
{
}
static inline struct nfs4_label *
nfs4_label_copy(struct nfs4_label *dst, struct nfs4_label *src)
{
return NULL;
}
#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
/* proc.c */
void nfs_close_context(struct nfs_open_context *ctx, int is_sync);
extern struct nfs_client *nfs_init_client(struct nfs_client *clp,
const struct nfs_client_initdata *);
/* dir.c */
extern void nfs_readdir_record_entry_cache_hit(struct inode *dir);
extern void nfs_readdir_record_entry_cache_miss(struct inode *dir);
extern unsigned long nfs_access_cache_count(struct shrinker *shrink,
struct shrink_control *sc);
extern unsigned long nfs_access_cache_scan(struct shrinker *shrink,
struct shrink_control *sc);
struct dentry *nfs_lookup(struct inode *, struct dentry *, unsigned int);
void nfs_d_prune_case_insensitive_aliases(struct inode *inode);
int nfs_create(struct user_namespace *, struct inode *, struct dentry *,
umode_t, bool);
int nfs_mkdir(struct user_namespace *, struct inode *, struct dentry *,
umode_t);
int nfs_rmdir(struct inode *, struct dentry *);
int nfs_unlink(struct inode *, struct dentry *);
int nfs_symlink(struct user_namespace *, struct inode *, struct dentry *,
const char *);
int nfs_link(struct dentry *, struct inode *, struct dentry *);
int nfs_mknod(struct user_namespace *, struct inode *, struct dentry *, umode_t,
dev_t);
int nfs_rename(struct user_namespace *, struct inode *, struct dentry *,
struct inode *, struct dentry *, unsigned int);
#ifdef CONFIG_NFS_V4_2
static inline __u32 nfs_access_xattr_mask(const struct nfs_server *server)
{
if (!(server->caps & NFS_CAP_XATTR))
return 0;
return NFS4_ACCESS_XAREAD | NFS4_ACCESS_XAWRITE | NFS4_ACCESS_XALIST;
}
#else
static inline __u32 nfs_access_xattr_mask(const struct nfs_server *server)
{
return 0;
}
#endif
/* file.c */
int nfs_file_fsync(struct file *file, loff_t start, loff_t end, int datasync);
loff_t nfs_file_llseek(struct file *, loff_t, int);
ssize_t nfs_file_read(struct kiocb *, struct iov_iter *);
int nfs_file_mmap(struct file *, struct vm_area_struct *);
ssize_t nfs_file_write(struct kiocb *, struct iov_iter *);
int nfs_file_release(struct inode *, struct file *);
int nfs_lock(struct file *, int, struct file_lock *);
int nfs_flock(struct file *, int, struct file_lock *);
int nfs_check_flags(int);
/* inode.c */
extern struct workqueue_struct *nfsiod_workqueue;
extern struct inode *nfs_alloc_inode(struct super_block *sb);
extern void nfs_free_inode(struct inode *);
extern int nfs_write_inode(struct inode *, struct writeback_control *);
extern int nfs_drop_inode(struct inode *);
extern void nfs_clear_inode(struct inode *);
extern void nfs_evict_inode(struct inode *);
extern void nfs_zap_acl_cache(struct inode *inode);
extern void nfs_set_cache_invalid(struct inode *inode, unsigned long flags);
extern bool nfs_check_cache_invalid(struct inode *, unsigned long);
extern int nfs_wait_bit_killable(struct wait_bit_key *key, int mode);
extern int nfs_wait_atomic_killable(atomic_t *p, unsigned int mode);
/* super.c */
extern const struct super_operations nfs_sops;
bool nfs_auth_info_match(const struct nfs_auth_info *, rpc_authflavor_t);
int nfs_try_get_tree(struct fs_context *);
int nfs_get_tree_common(struct fs_context *);
void nfs_kill_super(struct super_block *);
extern struct rpc_stat nfs_rpcstat;
extern int __init register_nfs_fs(void);
extern void __exit unregister_nfs_fs(void);
extern bool nfs_sb_active(struct super_block *sb);
extern void nfs_sb_deactive(struct super_block *sb);
extern int nfs_client_for_each_server(struct nfs_client *clp,
int (*fn)(struct nfs_server *, void *),
void *data);
/* io.c */
extern void nfs_start_io_read(struct inode *inode);
extern void nfs_end_io_read(struct inode *inode);
extern void nfs_start_io_write(struct inode *inode);
extern void nfs_end_io_write(struct inode *inode);
extern void nfs_start_io_direct(struct inode *inode);
extern void nfs_end_io_direct(struct inode *inode);
static inline bool nfs_file_io_is_buffered(struct nfs_inode *nfsi)
{
return test_bit(NFS_INO_ODIRECT, &nfsi->flags) == 0;
}
/* namespace.c */
#define NFS_PATH_CANONICAL 1
extern char *nfs_path(char **p, struct dentry *dentry,
char *buffer, ssize_t buflen, unsigned flags);
extern struct vfsmount *nfs_d_automount(struct path *path);
int nfs_submount(struct fs_context *, struct nfs_server *);
int nfs_do_submount(struct fs_context *);
/* getroot.c */
extern int nfs_get_root(struct super_block *s, struct fs_context *fc);
#if IS_ENABLED(CONFIG_NFS_V4)
extern int nfs4_get_rootfh(struct nfs_server *server, struct nfs_fh *mntfh, bool);
#endif
struct nfs_pgio_completion_ops;
/* read.c */
extern void nfs_pageio_init_read(struct nfs_pageio_descriptor *pgio,
struct inode *inode, bool force_mds,
const struct nfs_pgio_completion_ops *compl_ops);
extern void nfs_read_prepare(struct rpc_task *task, void *calldata);
extern void nfs_pageio_reset_read_mds(struct nfs_pageio_descriptor *pgio);
/* super.c */
void nfs_umount_begin(struct super_block *);
int nfs_statfs(struct dentry *, struct kstatfs *);
int nfs_show_options(struct seq_file *, struct dentry *);
int nfs_show_devname(struct seq_file *, struct dentry *);
int nfs_show_path(struct seq_file *, struct dentry *);
int nfs_show_stats(struct seq_file *, struct dentry *);
int nfs_reconfigure(struct fs_context *);
/* write.c */
extern void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio,
struct inode *inode, int ioflags, bool force_mds,
const struct nfs_pgio_completion_ops *compl_ops);
extern void nfs_pageio_reset_write_mds(struct nfs_pageio_descriptor *pgio);
extern void nfs_commit_free(struct nfs_commit_data *p);
extern void nfs_write_prepare(struct rpc_task *task, void *calldata);
extern void nfs_commit_prepare(struct rpc_task *task, void *calldata);
extern int nfs_initiate_commit(struct rpc_clnt *clnt,
struct nfs_commit_data *data,
const struct nfs_rpc_ops *nfs_ops,
const struct rpc_call_ops *call_ops,
int how, int flags);
extern void nfs_init_commit(struct nfs_commit_data *data,
struct list_head *head,
struct pnfs_layout_segment *lseg,
struct nfs_commit_info *cinfo);
int nfs_scan_commit_list(struct list_head *src, struct list_head *dst,
struct nfs_commit_info *cinfo, int max);
unsigned long nfs_reqs_to_commit(struct nfs_commit_info *);
int nfs_scan_commit(struct inode *inode, struct list_head *dst,
struct nfs_commit_info *cinfo);
void nfs_mark_request_commit(struct nfs_page *req,
struct pnfs_layout_segment *lseg,
struct nfs_commit_info *cinfo,
u32 ds_commit_idx);
int nfs_write_need_commit(struct nfs_pgio_header *);
void nfs_writeback_update_inode(struct nfs_pgio_header *hdr);
int nfs_generic_commit_list(struct inode *inode, struct list_head *head,
int how, struct nfs_commit_info *cinfo);
void nfs_retry_commit(struct list_head *page_list,
struct pnfs_layout_segment *lseg,
struct nfs_commit_info *cinfo,
u32 ds_commit_idx);
void nfs_commitdata_release(struct nfs_commit_data *data);
void nfs_request_add_commit_list(struct nfs_page *req,
struct nfs_commit_info *cinfo);
void nfs_request_add_commit_list_locked(struct nfs_page *req,
struct list_head *dst,
struct nfs_commit_info *cinfo);
void nfs_request_remove_commit_list(struct nfs_page *req,
struct nfs_commit_info *cinfo);
void nfs_init_cinfo(struct nfs_commit_info *cinfo,
struct inode *inode,
struct nfs_direct_req *dreq);
int nfs_key_timeout_notify(struct file *filp, struct inode *inode);
bool nfs_ctx_key_to_expire(struct nfs_open_context *ctx, struct inode *inode);
void nfs_pageio_stop_mirroring(struct nfs_pageio_descriptor *pgio);
int nfs_filemap_write_and_wait_range(struct address_space *mapping,
loff_t lstart, loff_t lend);
#ifdef CONFIG_NFS_V4_1
static inline void
pnfs_bucket_clear_pnfs_ds_commit_verifiers(struct pnfs_commit_bucket *buckets,
unsigned int nbuckets)
{
unsigned int i;
for (i = 0; i < nbuckets; i++)
buckets[i].direct_verf.committed = NFS_INVALID_STABLE_HOW;
}
static inline
void nfs_clear_pnfs_ds_commit_verifiers(struct pnfs_ds_commit_info *cinfo)
{
struct pnfs_commit_array *array;
rcu_read_lock();
list_for_each_entry_rcu(array, &cinfo->commits, cinfo_list)
pnfs_bucket_clear_pnfs_ds_commit_verifiers(array->buckets,
array->nbuckets);
rcu_read_unlock();
}
#else
static inline
void nfs_clear_pnfs_ds_commit_verifiers(struct pnfs_ds_commit_info *cinfo)
{
}
#endif
#ifdef CONFIG_MIGRATION
int nfs_migrate_folio(struct address_space *, struct folio *dst,
struct folio *src, enum migrate_mode);
#else
#define nfs_migrate_folio NULL
#endif
static inline int
nfs_write_verifier_cmp(const struct nfs_write_verifier *v1,
const struct nfs_write_verifier *v2)
{
return memcmp(v1->data, v2->data, sizeof(v1->data));
}
static inline bool
nfs_write_match_verf(const struct nfs_writeverf *verf,
struct nfs_page *req)
{
return verf->committed > NFS_UNSTABLE &&
!nfs_write_verifier_cmp(&req->wb_verf, &verf->verifier);
}
static inline gfp_t nfs_io_gfp_mask(void)
{
if (current->flags & PF_WQ_WORKER)
return GFP_KERNEL | __GFP_NORETRY | __GFP_NOWARN;
return GFP_KERNEL;
}
/* unlink.c */
extern struct rpc_task *
nfs_async_rename(struct inode *old_dir, struct inode *new_dir,
struct dentry *old_dentry, struct dentry *new_dentry,
void (*complete)(struct rpc_task *, struct nfs_renamedata *));
extern int nfs_sillyrename(struct inode *dir, struct dentry *dentry);
/* direct.c */
void nfs_init_cinfo_from_dreq(struct nfs_commit_info *cinfo,
struct nfs_direct_req *dreq);
extern ssize_t nfs_dreq_bytes_left(struct nfs_direct_req *dreq);
/* nfs4proc.c */
extern struct nfs_client *nfs4_init_client(struct nfs_client *clp,
const struct nfs_client_initdata *);
extern int nfs40_walk_client_list(struct nfs_client *clp,
struct nfs_client **result,
const struct cred *cred);
extern int nfs41_walk_client_list(struct nfs_client *clp,
struct nfs_client **result,
const struct cred *cred);
extern void nfs4_test_session_trunk(struct rpc_clnt *clnt,
struct rpc_xprt *xprt,
void *data);
static inline struct inode *nfs_igrab_and_active(struct inode *inode)
{
struct super_block *sb = inode->i_sb;
if (sb && nfs_sb_active(sb)) {
if (igrab(inode))
return inode;
nfs_sb_deactive(sb);
}
return NULL;
}
static inline void nfs_iput_and_deactive(struct inode *inode)
{
if (inode != NULL) {
struct super_block *sb = inode->i_sb;
iput(inode);
nfs_sb_deactive(sb);
}
}
/*
* Determine the device name as a string
*/
static inline char *nfs_devname(struct dentry *dentry,
char *buffer, ssize_t buflen)
{
char *dummy;
return nfs_path(&dummy, dentry, buffer, buflen, NFS_PATH_CANONICAL);
}
/*
* Determine the actual block size (and log2 thereof)
*/
static inline
unsigned long nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp)
{
/* make sure blocksize is a power of two */
if ((bsize & (bsize - 1)) || nrbitsp) {
unsigned char nrbits;
for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--)
;
bsize = 1 << nrbits;
if (nrbitsp)
*nrbitsp = nrbits;
}
return bsize;
}
/*
* Calculate the number of 512byte blocks used.
*/
static inline blkcnt_t nfs_calc_block_size(u64 tsize)
{
blkcnt_t used = (tsize + 511) >> 9;
return (used > ULONG_MAX) ? ULONG_MAX : used;
}
/*
* Compute and set NFS server blocksize
*/
static inline
unsigned long nfs_block_size(unsigned long bsize, unsigned char *nrbitsp)
{
if (bsize < NFS_MIN_FILE_IO_SIZE)
bsize = NFS_DEF_FILE_IO_SIZE;
else if (bsize >= NFS_MAX_FILE_IO_SIZE)
bsize = NFS_MAX_FILE_IO_SIZE;
return nfs_block_bits(bsize, nrbitsp);
}
/*
* Determine the maximum file size for a superblock
*/
static inline
void nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize)
{
sb->s_maxbytes = (loff_t)maxfilesize;
if (sb->s_maxbytes > MAX_LFS_FILESIZE || sb->s_maxbytes <= 0)
sb->s_maxbytes = MAX_LFS_FILESIZE;
}
/*
* Record the page as unstable (an extra writeback period) and mark its
* inode as dirty.
*/
static inline
void nfs_mark_page_unstable(struct page *page, struct nfs_commit_info *cinfo)
{
if (!cinfo->dreq) {
struct inode *inode = page_file_mapping(page)->host;
/* This page is really still in write-back - just that the
* writeback is happening on the server now.
*/
inc_node_page_state(page, NR_WRITEBACK);
inc_wb_stat(&inode_to_bdi(inode)->wb, WB_WRITEBACK);
__mark_inode_dirty(inode, I_DIRTY_DATASYNC);
}
}
/*
* Determine the number of bytes of data the page contains
*/
static inline
unsigned int nfs_page_length(struct page *page)
{
loff_t i_size = i_size_read(page_file_mapping(page)->host);
if (i_size > 0) {
pgoff_t index = page_index(page);
pgoff_t end_index = (i_size - 1) >> PAGE_SHIFT;
if (index < end_index)
return PAGE_SIZE;
if (index == end_index)
return ((i_size - 1) & ~PAGE_MASK) + 1;
}
return 0;
}
/*
* Convert a umode to a dirent->d_type
*/
static inline
unsigned char nfs_umode_to_dtype(umode_t mode)
{
return (mode >> 12) & 15;
}
/*
* Determine the number of pages in an array of length 'len' and
* with a base offset of 'base'
*/
static inline
unsigned int nfs_page_array_len(unsigned int base, size_t len)
{
return ((unsigned long)len + (unsigned long)base +
PAGE_SIZE - 1) >> PAGE_SHIFT;
}
/*
* Convert a struct timespec64 into a 64-bit change attribute
*
* This does approximately the same thing as timespec64_to_ns(),
* but for calculation efficiency, we multiply the seconds by
* 1024*1024*1024.
*/
static inline
u64 nfs_timespec_to_change_attr(const struct timespec64 *ts)
{
return ((u64)ts->tv_sec << 30) + ts->tv_nsec;
}
#ifdef CONFIG_CRC32
/**
* nfs_fhandle_hash - calculate the crc32 hash for the filehandle
* @fh - pointer to filehandle
*
* returns a crc32 hash for the filehandle that is compatible with
* the one displayed by "wireshark".
*/
static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh)
{
return ~crc32_le(0xFFFFFFFF, &fh->data[0], fh->size);
}
static inline u32 nfs_stateid_hash(const nfs4_stateid *stateid)
{
return ~crc32_le(0xFFFFFFFF, &stateid->other[0],
NFS4_STATEID_OTHER_SIZE);
}
#else
static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh)
{
return 0;
}
static inline u32 nfs_stateid_hash(nfs4_stateid *stateid)
{
return 0;
}
#endif
static inline bool nfs_error_is_fatal(int err)
{
switch (err) {
case -ERESTARTSYS:
case -EINTR:
case -EACCES:
case -EDQUOT:
case -EFBIG:
case -EIO:
case -ENOSPC:
case -EROFS:
case -ESTALE:
case -E2BIG:
case -ENOMEM:
case -ETIMEDOUT:
return true;
default:
return false;
}
}
static inline bool nfs_error_is_fatal_on_server(int err)
{
switch (err) {
case 0:
case -ERESTARTSYS:
case -EINTR:
case -ENOMEM:
return false;
}
return nfs_error_is_fatal(err);
}
/*
* Select between a default port value and a user-specified port value.
* If a zero value is set, then autobind will be used.
*/
static inline void nfs_set_port(struct sockaddr *sap, int *port,
const unsigned short default_port)
{
if (*port == NFS_UNSPEC_PORT)
*port = default_port;
rpc_set_port(sap, *port);
}
|