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8#ifndef _LINUX_NFS_FS_H
9#define _LINUX_NFS_FS_H
10
11#include <uapi/linux/nfs_fs.h>
12
13
14
15
16
17#ifdef CONFIG_NFS_DEBUG
18# define NFS_DEBUG
19#endif
20
21#include <linux/in.h>
22#include <linux/mm.h>
23#include <linux/pagemap.h>
24#include <linux/rbtree.h>
25#include <linux/rwsem.h>
26#include <linux/wait.h>
27
28#include <linux/sunrpc/debug.h>
29#include <linux/sunrpc/auth.h>
30#include <linux/sunrpc/clnt.h>
31
32#include <linux/nfs.h>
33#include <linux/nfs2.h>
34#include <linux/nfs3.h>
35#include <linux/nfs4.h>
36#include <linux/nfs_xdr.h>
37#include <linux/nfs_fs_sb.h>
38
39#include <linux/mempool.h>
40
41
42
43
44#define NFS_RPC_SWAPFLAGS (RPC_TASK_SWAPPER|RPC_TASK_ROOTCREDS)
45
46
47
48
49struct nfs_access_entry {
50 struct rb_node rb_node;
51 struct list_head lru;
52 unsigned long jiffies;
53 struct rpc_cred * cred;
54 int mask;
55 struct rcu_head rcu_head;
56};
57
58struct nfs_lock_context {
59 atomic_t count;
60 struct list_head list;
61 struct nfs_open_context *open_context;
62 fl_owner_t lockowner;
63 atomic_t io_count;
64};
65
66struct nfs4_state;
67struct nfs_open_context {
68 struct nfs_lock_context lock_context;
69 fl_owner_t flock_owner;
70 struct dentry *dentry;
71 struct rpc_cred *cred;
72 struct nfs4_state *state;
73 fmode_t mode;
74
75 unsigned long flags;
76#define NFS_CONTEXT_ERROR_WRITE (0)
77#define NFS_CONTEXT_RESEND_WRITES (1)
78#define NFS_CONTEXT_BAD (2)
79#define NFS_CONTEXT_UNLOCK (3)
80 int error;
81
82 struct list_head list;
83 struct nfs4_threshold *mdsthreshold;
84};
85
86struct nfs_open_dir_context {
87 struct list_head list;
88 struct rpc_cred *cred;
89 unsigned long attr_gencount;
90 __u64 dir_cookie;
91 __u64 dup_cookie;
92 signed char duped;
93};
94
95
96
97
98struct nfs_delegation;
99
100struct posix_acl;
101
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103
104
105struct nfs_inode {
106
107
108
109 __u64 fileid;
110
111
112
113
114 struct nfs_fh fh;
115
116
117
118
119 unsigned long flags;
120 unsigned long cache_validity;
121
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135
136 unsigned long read_cache_jiffies;
137 unsigned long attrtimeo;
138 unsigned long attrtimeo_timestamp;
139
140 unsigned long attr_gencount;
141
142
143
144
145 unsigned long cache_change_attribute;
146
147 struct rb_root access_cache;
148 struct list_head access_cache_entry_lru;
149 struct list_head access_cache_inode_lru;
150
151
152
153
154
155 __be32 cookieverf[2];
156
157 unsigned long nrequests;
158 struct nfs_mds_commit_info commit_info;
159
160
161 struct list_head open_files;
162
163
164
165 struct rw_semaphore rmdir_sem;
166
167#if IS_ENABLED(CONFIG_NFS_V4)
168 struct nfs4_cached_acl *nfs4_acl;
169
170 struct list_head open_states;
171 struct nfs_delegation __rcu *delegation;
172 struct rw_semaphore rwsem;
173
174
175 struct pnfs_layout_hdr *layout;
176#endif
177
178 __u64 write_io;
179 __u64 read_io;
180#ifdef CONFIG_NFS_FSCACHE
181 struct fscache_cookie *fscache;
182#endif
183 struct inode vfs_inode;
184};
185
186
187
188
189#define NFS_INO_INVALID_ATTR 0x0001
190#define NFS_INO_INVALID_DATA 0x0002
191#define NFS_INO_INVALID_ATIME 0x0004
192#define NFS_INO_INVALID_ACCESS 0x0008
193#define NFS_INO_INVALID_ACL 0x0010
194#define NFS_INO_REVAL_PAGECACHE 0x0020
195#define NFS_INO_REVAL_FORCED 0x0040
196#define NFS_INO_INVALID_LABEL 0x0080
197
198
199
200
201#define NFS_INO_ADVISE_RDPLUS (0)
202#define NFS_INO_STALE (1)
203#define NFS_INO_ACL_LRU_SET (2)
204#define NFS_INO_INVALIDATING (3)
205#define NFS_INO_FSCACHE (5)
206#define NFS_INO_FSCACHE_LOCK (6)
207#define NFS_INO_LAYOUTCOMMIT (9)
208#define NFS_INO_LAYOUTCOMMITTING (10)
209#define NFS_INO_LAYOUTSTATS (11)
210#define NFS_INO_ODIRECT (12)
211
212static inline struct nfs_inode *NFS_I(const struct inode *inode)
213{
214 return container_of(inode, struct nfs_inode, vfs_inode);
215}
216
217static inline struct nfs_server *NFS_SB(const struct super_block *s)
218{
219 return (struct nfs_server *)(s->s_fs_info);
220}
221
222static inline struct nfs_fh *NFS_FH(const struct inode *inode)
223{
224 return &NFS_I(inode)->fh;
225}
226
227static inline struct nfs_server *NFS_SERVER(const struct inode *inode)
228{
229 return NFS_SB(inode->i_sb);
230}
231
232static inline struct rpc_clnt *NFS_CLIENT(const struct inode *inode)
233{
234 return NFS_SERVER(inode)->client;
235}
236
237static inline const struct nfs_rpc_ops *NFS_PROTO(const struct inode *inode)
238{
239 return NFS_SERVER(inode)->nfs_client->rpc_ops;
240}
241
242static inline unsigned NFS_MINATTRTIMEO(const struct inode *inode)
243{
244 struct nfs_server *nfss = NFS_SERVER(inode);
245 return S_ISDIR(inode->i_mode) ? nfss->acdirmin : nfss->acregmin;
246}
247
248static inline unsigned NFS_MAXATTRTIMEO(const struct inode *inode)
249{
250 struct nfs_server *nfss = NFS_SERVER(inode);
251 return S_ISDIR(inode->i_mode) ? nfss->acdirmax : nfss->acregmax;
252}
253
254static inline int NFS_STALE(const struct inode *inode)
255{
256 return test_bit(NFS_INO_STALE, &NFS_I(inode)->flags);
257}
258
259static inline struct fscache_cookie *nfs_i_fscache(struct inode *inode)
260{
261#ifdef CONFIG_NFS_FSCACHE
262 return NFS_I(inode)->fscache;
263#else
264 return NULL;
265#endif
266}
267
268static inline __u64 NFS_FILEID(const struct inode *inode)
269{
270 return NFS_I(inode)->fileid;
271}
272
273static inline void set_nfs_fileid(struct inode *inode, __u64 fileid)
274{
275 NFS_I(inode)->fileid = fileid;
276}
277
278static inline void nfs_mark_for_revalidate(struct inode *inode)
279{
280 struct nfs_inode *nfsi = NFS_I(inode);
281
282 spin_lock(&inode->i_lock);
283 nfsi->cache_validity |= NFS_INO_INVALID_ATTR |
284 NFS_INO_REVAL_PAGECACHE |
285 NFS_INO_INVALID_ACCESS |
286 NFS_INO_INVALID_ACL;
287 if (S_ISDIR(inode->i_mode))
288 nfsi->cache_validity |= NFS_INO_INVALID_DATA;
289 spin_unlock(&inode->i_lock);
290}
291
292static inline int nfs_server_capable(struct inode *inode, int cap)
293{
294 return NFS_SERVER(inode)->caps & cap;
295}
296
297static inline void nfs_set_verifier(struct dentry * dentry, unsigned long verf)
298{
299 dentry->d_time = verf;
300}
301
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307
308static inline unsigned long nfs_save_change_attribute(struct inode *dir)
309{
310 return NFS_I(dir)->cache_change_attribute;
311}
312
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319
320
321static inline int nfs_verify_change_attribute(struct inode *dir, unsigned long chattr)
322{
323 return chattr == NFS_I(dir)->cache_change_attribute;
324}
325
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327
328
329extern int nfs_sync_mapping(struct address_space *mapping);
330extern void nfs_zap_mapping(struct inode *inode, struct address_space *mapping);
331extern void nfs_zap_caches(struct inode *);
332extern void nfs_invalidate_atime(struct inode *);
333extern struct inode *nfs_fhget(struct super_block *, struct nfs_fh *,
334 struct nfs_fattr *, struct nfs4_label *);
335extern int nfs_refresh_inode(struct inode *, struct nfs_fattr *);
336extern int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr);
337extern int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr);
338extern int nfs_post_op_update_inode_force_wcc_locked(struct inode *inode, struct nfs_fattr *fattr);
339extern int nfs_getattr(const struct path *, struct kstat *, u32, unsigned int);
340extern void nfs_access_add_cache(struct inode *, struct nfs_access_entry *);
341extern void nfs_access_set_mask(struct nfs_access_entry *, u32);
342extern int nfs_permission(struct inode *, int);
343extern int nfs_open(struct inode *, struct file *);
344extern int nfs_attribute_cache_expired(struct inode *inode);
345extern int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode);
346extern int __nfs_revalidate_inode(struct nfs_server *, struct inode *);
347extern bool nfs_mapping_need_revalidate_inode(struct inode *inode);
348extern int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping);
349extern int nfs_revalidate_mapping_rcu(struct inode *inode);
350extern int nfs_setattr(struct dentry *, struct iattr *);
351extern void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr, struct nfs_fattr *);
352extern void nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr,
353 struct nfs4_label *label);
354extern struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx);
355extern void put_nfs_open_context(struct nfs_open_context *ctx);
356extern struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, fmode_t mode);
357extern struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry, fmode_t f_mode, struct file *filp);
358extern void nfs_inode_attach_open_context(struct nfs_open_context *ctx);
359extern void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx);
360extern void nfs_file_clear_open_context(struct file *flip);
361extern struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx);
362extern void nfs_put_lock_context(struct nfs_lock_context *l_ctx);
363extern u64 nfs_compat_user_ino64(u64 fileid);
364extern void nfs_fattr_init(struct nfs_fattr *fattr);
365extern void nfs_fattr_set_barrier(struct nfs_fattr *fattr);
366extern unsigned long nfs_inc_attr_generation_counter(void);
367
368extern struct nfs_fattr *nfs_alloc_fattr(void);
369
370static inline void nfs_free_fattr(const struct nfs_fattr *fattr)
371{
372 kfree(fattr);
373}
374
375extern struct nfs_fh *nfs_alloc_fhandle(void);
376
377static inline void nfs_free_fhandle(const struct nfs_fh *fh)
378{
379 kfree(fh);
380}
381
382#ifdef NFS_DEBUG
383extern u32 _nfs_display_fhandle_hash(const struct nfs_fh *fh);
384static inline u32 nfs_display_fhandle_hash(const struct nfs_fh *fh)
385{
386 return _nfs_display_fhandle_hash(fh);
387}
388extern void _nfs_display_fhandle(const struct nfs_fh *fh, const char *caption);
389#define nfs_display_fhandle(fh, caption) \
390 do { \
391 if (unlikely(nfs_debug & NFSDBG_FACILITY)) \
392 _nfs_display_fhandle(fh, caption); \
393 } while (0)
394#else
395static inline u32 nfs_display_fhandle_hash(const struct nfs_fh *fh)
396{
397 return 0;
398}
399static inline void nfs_display_fhandle(const struct nfs_fh *fh,
400 const char *caption)
401{
402}
403#endif
404
405
406
407
408extern int nfs_root_data(char **root_device, char **root_data);
409
410extern __be32 root_nfs_parse_addr(char *name);
411
412
413
414
415extern const struct file_operations nfs_file_operations;
416#if IS_ENABLED(CONFIG_NFS_V4)
417extern const struct file_operations nfs4_file_operations;
418#endif
419extern const struct address_space_operations nfs_file_aops;
420extern const struct address_space_operations nfs_dir_aops;
421
422static inline struct nfs_open_context *nfs_file_open_context(struct file *filp)
423{
424 return filp->private_data;
425}
426
427static inline struct rpc_cred *nfs_file_cred(struct file *file)
428{
429 if (file != NULL) {
430 struct nfs_open_context *ctx =
431 nfs_file_open_context(file);
432 if (ctx)
433 return ctx->cred;
434 }
435 return NULL;
436}
437
438
439
440
441extern ssize_t nfs_direct_IO(struct kiocb *, struct iov_iter *);
442extern ssize_t nfs_file_direct_read(struct kiocb *iocb,
443 struct iov_iter *iter);
444extern ssize_t nfs_file_direct_write(struct kiocb *iocb,
445 struct iov_iter *iter);
446
447
448
449
450extern const struct file_operations nfs_dir_operations;
451extern const struct dentry_operations nfs_dentry_operations;
452
453extern void nfs_force_lookup_revalidate(struct inode *dir);
454extern int nfs_instantiate(struct dentry *dentry, struct nfs_fh *fh,
455 struct nfs_fattr *fattr, struct nfs4_label *label);
456extern int nfs_may_open(struct inode *inode, struct rpc_cred *cred, int openflags);
457extern void nfs_access_zap_cache(struct inode *inode);
458
459
460
461
462extern const struct inode_operations nfs_symlink_inode_operations;
463
464
465
466
467#ifdef CONFIG_SYSCTL
468extern int nfs_register_sysctl(void);
469extern void nfs_unregister_sysctl(void);
470#else
471#define nfs_register_sysctl() 0
472#define nfs_unregister_sysctl() do { } while(0)
473#endif
474
475
476
477
478extern const struct inode_operations nfs_mountpoint_inode_operations;
479extern const struct inode_operations nfs_referral_inode_operations;
480extern int nfs_mountpoint_expiry_timeout;
481extern void nfs_release_automount_timer(void);
482
483
484
485
486extern void nfs_complete_unlink(struct dentry *dentry, struct inode *);
487
488
489
490
491extern int nfs_congestion_kb;
492extern int nfs_writepage(struct page *page, struct writeback_control *wbc);
493extern int nfs_writepages(struct address_space *, struct writeback_control *);
494extern int nfs_flush_incompatible(struct file *file, struct page *page);
495extern int nfs_updatepage(struct file *, struct page *, unsigned int, unsigned int);
496
497
498
499
500
501extern int nfs_sync_inode(struct inode *inode);
502extern int nfs_wb_all(struct inode *inode);
503extern int nfs_wb_page(struct inode *inode, struct page *page);
504extern int nfs_wb_page_cancel(struct inode *inode, struct page* page);
505extern int nfs_commit_inode(struct inode *, int);
506extern struct nfs_commit_data *nfs_commitdata_alloc(bool never_fail);
507extern void nfs_commit_free(struct nfs_commit_data *data);
508
509static inline int
510nfs_have_writebacks(struct inode *inode)
511{
512 return NFS_I(inode)->nrequests != 0;
513}
514
515
516
517
518extern int nfs_readpage(struct file *, struct page *);
519extern int nfs_readpages(struct file *, struct address_space *,
520 struct list_head *, unsigned);
521extern int nfs_readpage_async(struct nfs_open_context *, struct inode *,
522 struct page *);
523
524
525
526
527
528static inline loff_t nfs_size_to_loff_t(__u64 size)
529{
530 return min_t(u64, size, OFFSET_MAX);
531}
532
533static inline ino_t
534nfs_fileid_to_ino_t(u64 fileid)
535{
536 ino_t ino = (ino_t) fileid;
537 if (sizeof(ino_t) < sizeof(u64))
538 ino ^= fileid >> (sizeof(u64)-sizeof(ino_t)) * 8;
539 return ino;
540}
541
542#define NFS_JUKEBOX_RETRY_TIME (5 * HZ)
543
544
545# undef ifdebug
546# ifdef NFS_DEBUG
547# define ifdebug(fac) if (unlikely(nfs_debug & NFSDBG_##fac))
548# define NFS_IFDEBUG(x) x
549# else
550# define ifdebug(fac) if (0)
551# define NFS_IFDEBUG(x)
552# endif
553#endif
554