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1/*
2 * linux/include/linux/nfs_fs.h
3 *
4 * Copyright (C) 1992 Rick Sladkey
5 *
6 * OS-specific nfs filesystem definitions and declarations
7 */
8
9#ifndef _LINUX_NFS_FS_H
10#define _LINUX_NFS_FS_H
11
12#include <linux/config.h>
13#include <linux/in.h>
14#include <linux/mm.h>
15#include <linux/pagemap.h>
16#include <linux/rwsem.h>
17#include <linux/wait.h>
18#include <linux/uio.h>
19
20#include <linux/nfs_fs_sb.h>
21
22#include <linux/sunrpc/debug.h>
23#include <linux/sunrpc/auth.h>
24#include <linux/sunrpc/clnt.h>
25
26#include <linux/nfs.h>
27#include <linux/nfs2.h>
28#include <linux/nfs3.h>
29#include <linux/nfs4.h>
30#include <linux/nfs_xdr.h>
31#include <linux/rwsem.h>
32#include <linux/workqueue.h>
33#include <linux/mempool.h>
34
35/*
36 * Enable debugging support for nfs client.
37 * Requires RPC_DEBUG.
38 */
39#ifdef RPC_DEBUG
40# define NFS_DEBUG
41#endif
42
43#define NFS_MAX_FILE_IO_BUFFER_SIZE 32768
44#define NFS_DEF_FILE_IO_BUFFER_SIZE 4096
45
46/*
47 * The upper limit on timeouts for the exponential backoff algorithm.
48 */
49#define NFS_WRITEBACK_DELAY (5*HZ)
50#define NFS_WRITEBACK_LOCKDELAY (60*HZ)
51#define NFS_COMMIT_DELAY (5*HZ)
52
53/*
54 * superblock magic number for NFS
55 */
56#define NFS_SUPER_MAGIC 0x6969
57
58/*
59 * These are the default flags for swap requests
60 */
61#define NFS_RPC_SWAPFLAGS (RPC_TASK_SWAPPER|RPC_TASK_ROOTCREDS)
62
63#define NFS_RW_SYNC 0x0001 /* O_SYNC handling */
64#define NFS_RW_SWAP 0x0002 /* This is a swap request */
65
66/*
67 * When flushing a cluster of dirty pages, there can be different
68 * strategies:
69 */
70#define FLUSH_AGING 0 /* only flush old buffers */
71#define FLUSH_SYNC 1 /* file being synced, or contention */
72#define FLUSH_WAIT 2 /* wait for completion */
73#define FLUSH_STABLE 4 /* commit to stable storage */
74#define FLUSH_LOWPRI 8 /* low priority background flush */
75#define FLUSH_HIGHPRI 16 /* high priority memory reclaim flush */
76
77#ifdef __KERNEL__
78
79/*
80 * NFSv3/v4 Access mode cache entry
81 */
82struct nfs_access_entry {
83 unsigned long jiffies;
84 struct rpc_cred * cred;
85 int mask;
86};
87
88struct nfs4_state;
89struct nfs_open_context {
90 atomic_t count;
91 struct dentry *dentry;
92 struct rpc_cred *cred;
93 struct nfs4_state *state;
94 fl_owner_t lockowner;
95 int mode;
96 int error;
97
98 struct list_head list;
99 wait_queue_head_t waitq;
100};
101
102/*
103 * NFSv4 delegation
104 */
105struct nfs_delegation;
106
107/*
108 * nfs fs inode data in memory
109 */
110struct nfs_inode {
111 /*
112 * The 64bit 'inode number'
113 */
114 __u64 fileid;
115
116 /*
117 * NFS file handle
118 */
119 struct nfs_fh fh;
120
121 /*
122 * Various flags
123 */
124 unsigned int flags;
125
126 /*
127 * read_cache_jiffies is when we started read-caching this inode,
128 * and read_cache_mtime is the mtime of the inode at that time.
129 * attrtimeo is for how long the cached information is assumed
130 * to be valid. A successful attribute revalidation doubles
131 * attrtimeo (up to acregmax/acdirmax), a failure resets it to
132 * acregmin/acdirmin.
133 *
134 * We need to revalidate the cached attrs for this inode if
135 *
136 * jiffies - read_cache_jiffies > attrtimeo
137 *
138 * and invalidate any cached data/flush out any dirty pages if
139 * we find that
140 *
141 * mtime != read_cache_mtime
142 */
143 unsigned long readdir_timestamp;
144 unsigned long read_cache_jiffies;
145 unsigned long attrtimeo;
146 unsigned long attrtimeo_timestamp;
147 __u64 change_attr; /* v4 only */
148
149 /* "Generation counter" for the attribute cache. This is
150 * bumped whenever we update the metadata on the
151 * server.
152 */
153 unsigned long cache_change_attribute;
154 /*
155 * Counter indicating the number of outstanding requests that
156 * will cause a file data update.
157 */
158 atomic_t data_updates;
159
160 struct nfs_access_entry cache_access;
161
162 /*
163 * This is the cookie verifier used for NFSv3 readdir
164 * operations
165 */
166 __u32 cookieverf[2];
167
168 /*
169 * This is the list of dirty unwritten pages.
170 */
171 spinlock_t req_lock;
172 struct list_head dirty;
173 struct list_head commit;
174 struct radix_tree_root nfs_page_tree;
175
176 unsigned int ndirty,
177 ncommit,
178 npages;
179
180 /* Open contexts for shared mmap writes */
181 struct list_head open_files;
182
183 wait_queue_head_t nfs_i_wait;
184
185#ifdef CONFIG_NFS_V4
186 /* NFSv4 state */
187 struct list_head open_states;
188 struct nfs_delegation *delegation;
189 int delegation_state;
190 struct rw_semaphore rwsem;
191#endif /* CONFIG_NFS_V4*/
192
193 struct inode vfs_inode;
194};
195
196/*
197 * Legal inode flag values
198 */
199#define NFS_INO_STALE 0x0001 /* possible stale inode */
200#define NFS_INO_ADVISE_RDPLUS 0x0002 /* advise readdirplus */
201#define NFS_INO_REVALIDATING 0x0004 /* revalidating attrs */
202#define NFS_INO_INVALID_ATTR 0x0008 /* cached attrs are invalid */
203#define NFS_INO_INVALID_DATA 0x0010 /* cached data is invalid */
204#define NFS_INO_INVALID_ATIME 0x0020 /* cached atime is invalid */
205#define NFS_INO_INVALID_ACCESS 0x0040 /* cached access cred invalid */
206
207static inline struct nfs_inode *NFS_I(struct inode *inode)
208{
209 return container_of(inode, struct nfs_inode, vfs_inode);
210}
211#define NFS_SB(s) ((struct nfs_server *)(s->s_fs_info))
212
213#define NFS_FH(inode) (&NFS_I(inode)->fh)
214#define NFS_SERVER(inode) (NFS_SB(inode->i_sb))
215#define NFS_CLIENT(inode) (NFS_SERVER(inode)->client)
216#define NFS_PROTO(inode) (NFS_SERVER(inode)->rpc_ops)
217#define NFS_ADDR(inode) (RPC_PEERADDR(NFS_CLIENT(inode)))
218#define NFS_COOKIEVERF(inode) (NFS_I(inode)->cookieverf)
219#define NFS_READTIME(inode) (NFS_I(inode)->read_cache_jiffies)
220#define NFS_CHANGE_ATTR(inode) (NFS_I(inode)->change_attr)
221#define NFS_ATTRTIMEO(inode) (NFS_I(inode)->attrtimeo)
222#define NFS_MINATTRTIMEO(inode) \
223 (S_ISDIR(inode->i_mode)? NFS_SERVER(inode)->acdirmin \
224 : NFS_SERVER(inode)->acregmin)
225#define NFS_MAXATTRTIMEO(inode) \
226 (S_ISDIR(inode->i_mode)? NFS_SERVER(inode)->acdirmax \
227 : NFS_SERVER(inode)->acregmax)
228#define NFS_ATTRTIMEO_UPDATE(inode) (NFS_I(inode)->attrtimeo_timestamp)
229
230#define NFS_FLAGS(inode) (NFS_I(inode)->flags)
231#define NFS_REVALIDATING(inode) (NFS_FLAGS(inode) & NFS_INO_REVALIDATING)
232#define NFS_STALE(inode) (NFS_FLAGS(inode) & NFS_INO_STALE)
233
234#define NFS_FILEID(inode) (NFS_I(inode)->fileid)
235
236static inline int nfs_caches_unstable(struct inode *inode)
237{
238 return atomic_read(&NFS_I(inode)->data_updates) != 0;
239}
240
241static inline void NFS_CACHEINV(struct inode *inode)
242{
243 if (!nfs_caches_unstable(inode))
244 NFS_FLAGS(inode) |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS;
245}
246
247static inline int nfs_server_capable(struct inode *inode, int cap)
248{
249 return NFS_SERVER(inode)->caps & cap;
250}
251
252static inline int NFS_USE_READDIRPLUS(struct inode *inode)
253{
254 return NFS_FLAGS(inode) & NFS_INO_ADVISE_RDPLUS;
255}
256
257/**
258 * nfs_save_change_attribute - Returns the inode attribute change cookie
259 * @inode - pointer to inode
260 * The "change attribute" is updated every time we finish an operation
261 * that will result in a metadata change on the server.
262 */
263static inline long nfs_save_change_attribute(struct inode *inode)
264{
265 return NFS_I(inode)->cache_change_attribute;
266}
267
268/**
269 * nfs_verify_change_attribute - Detects NFS inode cache updates
270 * @inode - pointer to inode
271 * @chattr - previously saved change attribute
272 * Return "false" if metadata has been updated (or is in the process of
273 * being updated) since the change attribute was saved.
274 */
275static inline int nfs_verify_change_attribute(struct inode *inode, unsigned long chattr)
276{
277 return !nfs_caches_unstable(inode)
278 && chattr == NFS_I(inode)->cache_change_attribute;
279}
280
281/*
282 * linux/fs/nfs/inode.c
283 */
284extern void nfs_zap_caches(struct inode *);
285extern struct inode *nfs_fhget(struct super_block *, struct nfs_fh *,
286 struct nfs_fattr *);
287extern int nfs_refresh_inode(struct inode *, struct nfs_fattr *);
288extern int nfs_getattr(struct vfsmount *, struct dentry *, struct kstat *);
289extern int nfs_permission(struct inode *, int, struct nameidata *);
290extern int nfs_access_get_cached(struct inode *, struct rpc_cred *, struct nfs_access_entry *);
291extern void nfs_access_add_cache(struct inode *, struct nfs_access_entry *);
292extern int nfs_open(struct inode *, struct file *);
293extern int nfs_release(struct inode *, struct file *);
294extern int nfs_attribute_timeout(struct inode *inode);
295extern int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode);
296extern int __nfs_revalidate_inode(struct nfs_server *, struct inode *);
297extern int nfs_setattr(struct dentry *, struct iattr *);
298extern void nfs_begin_attr_update(struct inode *);
299extern void nfs_end_attr_update(struct inode *);
300extern void nfs_begin_data_update(struct inode *);
301extern void nfs_end_data_update(struct inode *);
302extern void nfs_end_data_update_defer(struct inode *);
303extern struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry, struct rpc_cred *cred);
304extern struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx);
305extern void put_nfs_open_context(struct nfs_open_context *ctx);
306extern void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx);
307extern struct nfs_open_context *nfs_find_open_context(struct inode *inode, int mode);
308extern void nfs_file_clear_open_context(struct file *filp);
309
310/* linux/net/ipv4/ipconfig.c: trims ip addr off front of name, too. */
311extern u32 root_nfs_parse_addr(char *name); /*__init*/
312
313/*
314 * linux/fs/nfs/file.c
315 */
316extern struct inode_operations nfs_file_inode_operations;
317extern struct file_operations nfs_file_operations;
318extern struct address_space_operations nfs_file_aops;
319
320static inline struct rpc_cred *nfs_file_cred(struct file *file)
321{
322 if (file != NULL) {
323 struct nfs_open_context *ctx;
324
325 ctx = (struct nfs_open_context*)file->private_data;
326 return ctx->cred;
327 }
328 return NULL;
329}
330
331/*
332 * linux/fs/nfs/direct.c
333 */
334extern ssize_t nfs_direct_IO(int, struct kiocb *, const struct iovec *, loff_t,
335 unsigned long);
336extern ssize_t nfs_file_direct_read(struct kiocb *iocb, char __user *buf,
337 size_t count, loff_t pos);
338extern ssize_t nfs_file_direct_write(struct kiocb *iocb, const char __user *buf,
339 size_t count, loff_t pos);
340
341/*
342 * linux/fs/nfs/dir.c
343 */
344extern struct inode_operations nfs_dir_inode_operations;
345extern struct file_operations nfs_dir_operations;
346extern struct dentry_operations nfs_dentry_operations;
347
348extern int nfs_instantiate(struct dentry *dentry, struct nfs_fh *fh, struct nfs_fattr *fattr);
349
350/*
351 * linux/fs/nfs/symlink.c
352 */
353extern struct inode_operations nfs_symlink_inode_operations;
354
355/*
356 * linux/fs/nfs/unlink.c
357 */
358extern int nfs_async_unlink(struct dentry *);
359extern void nfs_complete_unlink(struct dentry *);
360
361/*
362 * linux/fs/nfs/write.c
363 */
364extern int nfs_writepage(struct page *page, struct writeback_control *wbc);
365extern int nfs_writepages(struct address_space *, struct writeback_control *);
366extern int nfs_flush_incompatible(struct file *file, struct page *page);
367extern int nfs_updatepage(struct file *, struct page *, unsigned int, unsigned int);
368extern void nfs_writeback_done(struct rpc_task *task);
369
370#if defined(CONFIG_NFS_V3) || defined(CONFIG_NFS_V4)
371extern void nfs_commit_done(struct rpc_task *);
372#endif
373
374/*
375 * Try to write back everything synchronously (but check the
376 * return value!)
377 */
378extern int nfs_sync_inode(struct inode *, unsigned long, unsigned int, int);
379#if defined(CONFIG_NFS_V3) || defined(CONFIG_NFS_V4)
380extern int nfs_commit_inode(struct inode *, unsigned long, unsigned int, int);
381#else
382static inline int
383nfs_commit_inode(struct inode *inode, unsigned long idx_start, unsigned int npages, int how)
384{
385 return 0;
386}
387#endif
388
389static inline int
390nfs_have_writebacks(struct inode *inode)
391{
392 return NFS_I(inode)->npages != 0;
393}
394
395static inline int
396nfs_wb_all(struct inode *inode)
397{
398 int error = nfs_sync_inode(inode, 0, 0, FLUSH_WAIT);
399 return (error < 0) ? error : 0;
400}
401
402/*
403 * Write back all requests on one page - we do this before reading it.
404 */
405static inline int nfs_wb_page_priority(struct inode *inode, struct page* page, int how)
406{
407 int error = nfs_sync_inode(inode, page->index, 1,
408 how | FLUSH_WAIT | FLUSH_STABLE);
409 return (error < 0) ? error : 0;
410}
411
412static inline int nfs_wb_page(struct inode *inode, struct page* page)
413{
414 return nfs_wb_page_priority(inode, page, 0);
415}
416
417/*
418 * Allocate and free nfs_write_data structures
419 */
420extern mempool_t *nfs_wdata_mempool;
421
422static inline struct nfs_write_data *nfs_writedata_alloc(void)
423{
424 struct nfs_write_data *p = mempool_alloc(nfs_wdata_mempool, SLAB_NOFS);
425 if (p) {
426 memset(p, 0, sizeof(*p));
427 INIT_LIST_HEAD(&p->pages);
428 }
429 return p;
430}
431
432static inline void nfs_writedata_free(struct nfs_write_data *p)
433{
434 mempool_free(p, nfs_wdata_mempool);
435}
436
437/* Hack for future NFS swap support */
438#ifndef IS_SWAPFILE
439# define IS_SWAPFILE(inode) (0)
440#endif
441
442/*
443 * linux/fs/nfs/read.c
444 */
445extern int nfs_readpage(struct file *, struct page *);
446extern int nfs_readpages(struct file *, struct address_space *,
447 struct list_head *, unsigned);
448extern void nfs_readpage_result(struct rpc_task *);
449
450/*
451 * Allocate and free nfs_read_data structures
452 */
453extern mempool_t *nfs_rdata_mempool;
454
455static inline struct nfs_read_data *nfs_readdata_alloc(void)
456{
457 struct nfs_read_data *p = mempool_alloc(nfs_rdata_mempool, SLAB_NOFS);
458 if (p)
459 memset(p, 0, sizeof(*p));
460 return p;
461}
462
463static inline void nfs_readdata_free(struct nfs_read_data *p)
464{
465 mempool_free(p, nfs_rdata_mempool);
466}
467
468extern void nfs_readdata_release(struct rpc_task *task);
469
470/*
471 * linux/fs/mount_clnt.c
472 * (Used only by nfsroot module)
473 */
474extern int nfsroot_mount(struct sockaddr_in *, char *, struct nfs_fh *,
475 int, int);
476
477/*
478 * inline functions
479 */
480
481static inline loff_t
482nfs_size_to_loff_t(__u64 size)
483{
484 loff_t maxsz = (((loff_t) ULONG_MAX) << PAGE_CACHE_SHIFT) + PAGE_CACHE_SIZE - 1;
485 if (size > maxsz)
486 return maxsz;
487 return (loff_t) size;
488}
489
490static inline ino_t
491nfs_fileid_to_ino_t(u64 fileid)
492{
493 ino_t ino = (ino_t) fileid;
494 if (sizeof(ino_t) < sizeof(u64))
495 ino ^= fileid >> (sizeof(u64)-sizeof(ino_t)) * 8;
496 return ino;
497}
498
499/* NFS root */
500
501extern void * nfs_root_data(void);
502
503#define nfs_wait_event(clnt, wq, condition) \
504({ \
505 int __retval = 0; \
506 if (clnt->cl_intr) { \
507 sigset_t oldmask; \
508 rpc_clnt_sigmask(clnt, &oldmask); \
509 __retval = wait_event_interruptible(wq, condition); \
510 rpc_clnt_sigunmask(clnt, &oldmask); \
511 } else \
512 wait_event(wq, condition); \
513 __retval; \
514})
515
516#define NFS_JUKEBOX_RETRY_TIME (5 * HZ)
517
518#ifdef CONFIG_NFS_V4
519
520struct idmap;
521
522/*
523 * In a seqid-mutating op, this macro controls which error return
524 * values trigger incrementation of the seqid.
525 *
526 * from rfc 3010:
527 * The client MUST monotonically increment the sequence number for the
528 * CLOSE, LOCK, LOCKU, OPEN, OPEN_CONFIRM, and OPEN_DOWNGRADE
529 * operations. This is true even in the event that the previous
530 * operation that used the sequence number received an error. The only
531 * exception to this rule is if the previous operation received one of
532 * the following errors: NFSERR_STALE_CLIENTID, NFSERR_STALE_STATEID,
533 * NFSERR_BAD_STATEID, NFSERR_BAD_SEQID, NFSERR_BADXDR,
534 * NFSERR_RESOURCE, NFSERR_NOFILEHANDLE.
535 *
536 */
537#define seqid_mutating_err(err) \
538(((err) != NFSERR_STALE_CLIENTID) && \
539 ((err) != NFSERR_STALE_STATEID) && \
540 ((err) != NFSERR_BAD_STATEID) && \
541 ((err) != NFSERR_BAD_SEQID) && \
542 ((err) != NFSERR_BAD_XDR) && \
543 ((err) != NFSERR_RESOURCE) && \
544 ((err) != NFSERR_NOFILEHANDLE))
545
546enum nfs4_client_state {
547 NFS4CLNT_OK = 0,
548};
549
550/*
551 * The nfs4_client identifies our client state to the server.
552 */
553struct nfs4_client {
554 struct list_head cl_servers; /* Global list of servers */
555 struct in_addr cl_addr; /* Server identifier */
556 u64 cl_clientid; /* constant */
557 nfs4_verifier cl_confirm;
558 unsigned long cl_state;
559
560 u32 cl_lockowner_id;
561
562 /*
563 * The following rwsem ensures exclusive access to the server
564 * while we recover the state following a lease expiration.
565 */
566 struct rw_semaphore cl_sem;
567
568 struct list_head cl_delegations;
569 struct list_head cl_state_owners;
570 struct list_head cl_unused;
571 int cl_nunused;
572 spinlock_t cl_lock;
573 atomic_t cl_count;
574
575 struct rpc_clnt * cl_rpcclient;
576 struct rpc_cred * cl_cred;
577
578 struct list_head cl_superblocks; /* List of nfs_server structs */
579
580 unsigned long cl_lease_time;
581 unsigned long cl_last_renewal;
582 struct work_struct cl_renewd;
583 struct work_struct cl_recoverd;
584
585 wait_queue_head_t cl_waitq;
586 struct rpc_wait_queue cl_rpcwaitq;
587
588 /* used for the setclientid verifier */
589 struct timespec cl_boot_time;
590
591 /* idmapper */
592 struct idmap * cl_idmap;
593
594 /* Our own IP address, as a null-terminated string.
595 * This is used to generate the clientid, and the callback address.
596 */
597 char cl_ipaddr[16];
598 unsigned char cl_id_uniquifier;
599};
600
601/*
602 * NFS4 state_owners and lock_owners are simply labels for ordered
603 * sequences of RPC calls. Their sole purpose is to provide once-only
604 * semantics by allowing the server to identify replayed requests.
605 *
606 * The ->so_sema is held during all state_owner seqid-mutating operations:
607 * OPEN, OPEN_DOWNGRADE, and CLOSE. Its purpose is to properly serialize
608 * so_seqid.
609 */
610struct nfs4_state_owner {
611 struct list_head so_list; /* per-clientid list of state_owners */
612 struct nfs4_client *so_client;
613 u32 so_id; /* 32-bit identifier, unique */
614 struct semaphore so_sema;
615 u32 so_seqid; /* protected by so_sema */
616 atomic_t so_count;
617
618 struct rpc_cred *so_cred; /* Associated cred */
619 struct list_head so_states;
620 struct list_head so_delegations;
621};
622
623/*
624 * struct nfs4_state maintains the client-side state for a given
625 * (state_owner,inode) tuple (OPEN) or state_owner (LOCK).
626 *
627 * OPEN:
628 * In order to know when to OPEN_DOWNGRADE or CLOSE the state on the server,
629 * we need to know how many files are open for reading or writing on a
630 * given inode. This information too is stored here.
631 *
632 * LOCK: one nfs4_state (LOCK) to hold the lock stateid nfs4_state(OPEN)
633 */
634
635struct nfs4_lock_state {
636 struct list_head ls_locks; /* Other lock stateids */
637 fl_owner_t ls_owner; /* POSIX lock owner */
638#define NFS_LOCK_INITIALIZED 1
639 int ls_flags;
640 u32 ls_seqid;
641 u32 ls_id;
642 nfs4_stateid ls_stateid;
643 atomic_t ls_count;
644};
645
646/* bits for nfs4_state->flags */
647enum {
648 LK_STATE_IN_USE,
649 NFS_DELEGATED_STATE,
650};
651
652struct nfs4_state {
653 struct list_head open_states; /* List of states for the same state_owner */
654 struct list_head inode_states; /* List of states for the same inode */
655 struct list_head lock_states; /* List of subservient lock stateids */
656
657 struct nfs4_state_owner *owner; /* Pointer to the open owner */
658 struct inode *inode; /* Pointer to the inode */
659
660 unsigned long flags; /* Do we hold any locks? */
661 struct semaphore lock_sema; /* Serializes file locking operations */
662 rwlock_t state_lock; /* Protects the lock_states list */
663
664 nfs4_stateid stateid;
665
666 unsigned int nreaders;
667 unsigned int nwriters;
668 int state; /* State on the server (R,W, or RW) */
669 atomic_t count;
670};
671
672
673struct nfs4_exception {
674 long timeout;
675 int retry;
676};
677
678struct nfs4_state_recovery_ops {
679 int (*recover_open)(struct nfs4_state_owner *, struct nfs4_state *);
680 int (*recover_lock)(struct nfs4_state *, struct file_lock *);
681};
682
683extern struct dentry_operations nfs4_dentry_operations;
684extern struct inode_operations nfs4_dir_inode_operations;
685
686/* nfs4proc.c */
687extern int nfs4_map_errors(int err);
688extern int nfs4_proc_setclientid(struct nfs4_client *, u32, unsigned short);
689extern int nfs4_proc_setclientid_confirm(struct nfs4_client *);
690extern int nfs4_proc_async_renew(struct nfs4_client *);
691extern int nfs4_proc_renew(struct nfs4_client *);
692extern int nfs4_do_close(struct inode *inode, struct nfs4_state *state, mode_t mode);
693extern struct inode *nfs4_atomic_open(struct inode *, struct dentry *, struct nameidata *);
694extern int nfs4_open_revalidate(struct inode *, struct dentry *, int);
695
696extern struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops;
697extern struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops;
698
699/* nfs4renewd.c */
700extern void nfs4_schedule_state_renewal(struct nfs4_client *);
701extern void nfs4_renewd_prepare_shutdown(struct nfs_server *);
702extern void nfs4_kill_renewd(struct nfs4_client *);
703
704/* nfs4state.c */
705extern void init_nfsv4_state(struct nfs_server *);
706extern void destroy_nfsv4_state(struct nfs_server *);
707extern struct nfs4_client *nfs4_get_client(struct in_addr *);
708extern void nfs4_put_client(struct nfs4_client *clp);
709extern int nfs4_init_client(struct nfs4_client *clp);
710extern struct nfs4_client *nfs4_find_client(struct in_addr *);
711extern u32 nfs4_alloc_lockowner_id(struct nfs4_client *);
712
713extern struct nfs4_state_owner * nfs4_get_state_owner(struct nfs_server *, struct rpc_cred *);
714extern void nfs4_put_state_owner(struct nfs4_state_owner *);
715extern void nfs4_drop_state_owner(struct nfs4_state_owner *);
716extern struct nfs4_state * nfs4_get_open_state(struct inode *, struct nfs4_state_owner *);
717extern void nfs4_put_open_state(struct nfs4_state *);
718extern void nfs4_close_state(struct nfs4_state *, mode_t);
719extern struct nfs4_state *nfs4_find_state(struct inode *, struct rpc_cred *, mode_t mode);
720extern void nfs4_increment_seqid(int status, struct nfs4_state_owner *sp);
721extern void nfs4_schedule_state_recovery(struct nfs4_client *);
722extern struct nfs4_lock_state *nfs4_find_lock_state(struct nfs4_state *state, fl_owner_t);
723extern struct nfs4_lock_state *nfs4_get_lock_state(struct nfs4_state *state, fl_owner_t);
724extern void nfs4_put_lock_state(struct nfs4_lock_state *state);
725extern void nfs4_increment_lock_seqid(int status, struct nfs4_lock_state *ls);
726extern void nfs4_notify_setlk(struct nfs4_state *, struct file_lock *, struct nfs4_lock_state *);
727extern void nfs4_notify_unlck(struct nfs4_state *, struct file_lock *, struct nfs4_lock_state *);
728extern void nfs4_copy_stateid(nfs4_stateid *, struct nfs4_state *, fl_owner_t);
729
730
731
732struct nfs4_mount_data;
733#else
734#define init_nfsv4_state(server) do { } while (0)
735#define destroy_nfsv4_state(server) do { } while (0)
736#define nfs4_put_state_owner(inode, owner) do { } while (0)
737#define nfs4_put_open_state(state) do { } while (0)
738#define nfs4_close_state(a, b) do { } while (0)
739#define nfs4_renewd_prepare_shutdown(server) do { } while (0)
740#endif
741
742#endif /* __KERNEL__ */
743
744/*
745 * NFS debug flags
746 */
747#define NFSDBG_VFS 0x0001
748#define NFSDBG_DIRCACHE 0x0002
749#define NFSDBG_LOOKUPCACHE 0x0004
750#define NFSDBG_PAGECACHE 0x0008
751#define NFSDBG_PROC 0x0010
752#define NFSDBG_XDR 0x0020
753#define NFSDBG_FILE 0x0040
754#define NFSDBG_ROOT 0x0080
755#define NFSDBG_CALLBACK 0x0100
756#define NFSDBG_ALL 0xFFFF
757
758#ifdef __KERNEL__
759# undef ifdebug
760# ifdef NFS_DEBUG
761# define ifdebug(fac) if (unlikely(nfs_debug & NFSDBG_##fac))
762# else
763# define ifdebug(fac) if (0)
764# endif
765#endif /* __KERNEL */
766
767#endif
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-24 11:35:25 -0500