1 /* SPDX-License-Identifier: GPL-2.0 */
3 * NFS internal definitions
7 #include <linux/mount.h>
8 #include <linux/security.h>
9 #include <linux/crc32.h>
10 #include <linux/nfs_page.h>
11 #include <linux/wait_bit.h>
13 #define NFS_MS_MASK (SB_RDONLY|SB_NOSUID|SB_NODEV|SB_NOEXEC|SB_SYNCHRONOUS)
15 extern const struct export_operations nfs_export_ops;
19 static inline void nfs_attr_check_mountpoint(struct super_block *parent, struct nfs_fattr *fattr)
21 if (!nfs_fsid_equal(&NFS_SB(parent)->fsid, &fattr->fsid))
22 fattr->valid |= NFS_ATTR_FATTR_MOUNTPOINT;
25 static inline int nfs_attr_use_mounted_on_fileid(struct nfs_fattr *fattr)
27 if (((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) == 0) ||
28 (((fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT) == 0) &&
29 ((fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) == 0)))
34 struct nfs_clone_mount {
35 const struct super_block *sb;
36 const struct dentry *dentry;
39 struct sockaddr *addr;
41 rpc_authflavor_t authflavor;
45 * Note: RFC 1813 doesn't limit the number of auth flavors that
46 * a server can return, so make something up.
48 #define NFS_MAX_SECFLAVORS (12)
51 * Value used if the user did not specify a port value.
53 #define NFS_UNSPEC_PORT (-1)
55 #define NFS_UNSPEC_RETRANS (UINT_MAX)
56 #define NFS_UNSPEC_TIMEO (UINT_MAX)
59 * Maximum number of pages that readdir can use for creating
60 * a vmapped array of pages.
62 #define NFS_MAX_READDIR_PAGES 8
64 struct nfs_client_initdata {
65 unsigned long init_flags;
66 const char *hostname; /* Hostname of the server */
67 const struct sockaddr *addr; /* Address of the server */
68 const char *nodename; /* Hostname of the client */
69 const char *ip_addr; /* IP address of the client */
71 struct nfs_subversion *nfs_mod;
74 unsigned int nconnect;
76 const struct rpc_timeout *timeparms;
77 const struct cred *cred;
81 * In-kernel mount arguments
83 struct nfs_parsed_mount_data {
85 unsigned int rsize, wsize;
86 unsigned int timeo, retrans;
87 unsigned int acregmin, acregmax,
92 struct nfs_auth_info auth_info;
93 rpc_authflavor_t selected_flavor;
96 unsigned int minorversion;
101 struct sockaddr_storage address;
106 unsigned short protocol;
110 struct sockaddr_storage address;
115 unsigned short protocol;
116 unsigned short nconnect;
124 struct nfs_mount_request {
125 struct sockaddr *sap;
130 unsigned short protocol;
133 unsigned int *auth_flav_len;
134 rpc_authflavor_t *auth_flavs;
138 struct nfs_mount_info {
139 unsigned int inherited_bsize;
140 struct nfs_parsed_mount_data *parsed;
141 struct nfs_clone_mount *cloned;
142 struct nfs_server *server;
143 struct nfs_fh *mntfh;
144 struct nfs_subversion *nfs_mod;
147 extern int nfs_mount(struct nfs_mount_request *info);
148 extern void nfs_umount(const struct nfs_mount_request *info);
151 extern const struct rpc_program nfs_program;
152 extern void nfs_clients_init(struct net *net);
153 extern void nfs_clients_exit(struct net *net);
154 extern struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *);
155 int nfs_create_rpc_client(struct nfs_client *, const struct nfs_client_initdata *, rpc_authflavor_t);
156 struct nfs_client *nfs_get_client(const struct nfs_client_initdata *);
157 int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *, struct nfs_fattr *);
158 void nfs_server_insert_lists(struct nfs_server *);
159 void nfs_server_remove_lists(struct nfs_server *);
160 void nfs_init_timeout_values(struct rpc_timeout *to, int proto, int timeo, int retrans);
161 int nfs_init_server_rpcclient(struct nfs_server *, const struct rpc_timeout *t,
163 struct nfs_server *nfs_alloc_server(void);
164 void nfs_server_copy_userdata(struct nfs_server *, struct nfs_server *);
166 extern void nfs_put_client(struct nfs_client *);
167 extern void nfs_free_client(struct nfs_client *);
168 extern struct nfs_client *nfs4_find_client_ident(struct net *, int);
169 extern struct nfs_client *
170 nfs4_find_client_sessionid(struct net *, const struct sockaddr *,
171 struct nfs4_sessionid *, u32);
172 extern struct nfs_server *nfs_create_server(struct nfs_mount_info *);
173 extern struct nfs_server *nfs4_create_server(struct nfs_mount_info *);
174 extern struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *,
176 extern int nfs4_update_server(struct nfs_server *server, const char *hostname,
177 struct sockaddr *sap, size_t salen,
179 extern void nfs_free_server(struct nfs_server *server);
180 extern struct nfs_server *nfs_clone_server(struct nfs_server *,
184 extern bool nfs_client_init_is_complete(const struct nfs_client *clp);
185 extern int nfs_client_init_status(const struct nfs_client *clp);
186 extern int nfs_wait_client_init_complete(const struct nfs_client *clp);
187 extern void nfs_mark_client_ready(struct nfs_client *clp, int state);
188 extern struct nfs_client *nfs4_set_ds_client(struct nfs_server *mds_srv,
189 const struct sockaddr *ds_addr,
190 int ds_addrlen, int ds_proto,
191 unsigned int ds_timeo,
192 unsigned int ds_retrans,
194 extern struct rpc_clnt *nfs4_find_or_create_ds_client(struct nfs_client *,
196 extern struct nfs_client *nfs3_set_ds_client(struct nfs_server *mds_srv,
197 const struct sockaddr *ds_addr, int ds_addrlen,
198 int ds_proto, unsigned int ds_timeo,
199 unsigned int ds_retrans);
200 #ifdef CONFIG_PROC_FS
201 extern int __init nfs_fs_proc_init(void);
202 extern void nfs_fs_proc_exit(void);
203 extern int nfs_fs_proc_net_init(struct net *net);
204 extern void nfs_fs_proc_net_exit(struct net *net);
206 static inline int nfs_fs_proc_net_init(struct net *net)
210 static inline void nfs_fs_proc_net_exit(struct net *net)
213 static inline int nfs_fs_proc_init(void)
217 static inline void nfs_fs_proc_exit(void)
223 extern const struct svc_version nfs4_callback_version1;
224 extern const struct svc_version nfs4_callback_version4;
226 struct nfs_pageio_descriptor;
228 extern int __init nfs_init_nfspagecache(void);
229 extern void nfs_destroy_nfspagecache(void);
230 extern int __init nfs_init_readpagecache(void);
231 extern void nfs_destroy_readpagecache(void);
232 extern int __init nfs_init_writepagecache(void);
233 extern void nfs_destroy_writepagecache(void);
235 extern int __init nfs_init_directcache(void);
236 extern void nfs_destroy_directcache(void);
237 extern void nfs_pgheader_init(struct nfs_pageio_descriptor *desc,
238 struct nfs_pgio_header *hdr,
239 void (*release)(struct nfs_pgio_header *hdr));
240 void nfs_set_pgio_error(struct nfs_pgio_header *hdr, int error, loff_t pos);
241 int nfs_iocounter_wait(struct nfs_lock_context *l_ctx);
243 extern const struct nfs_pageio_ops nfs_pgio_rw_ops;
244 struct nfs_pgio_header *nfs_pgio_header_alloc(const struct nfs_rw_ops *);
245 void nfs_pgio_header_free(struct nfs_pgio_header *);
246 int nfs_generic_pgio(struct nfs_pageio_descriptor *, struct nfs_pgio_header *);
247 int nfs_initiate_pgio(struct rpc_clnt *clnt, struct nfs_pgio_header *hdr,
248 const struct cred *cred, const struct nfs_rpc_ops *rpc_ops,
249 const struct rpc_call_ops *call_ops, int how, int flags);
250 void nfs_free_request(struct nfs_page *req);
251 struct nfs_pgio_mirror *
252 nfs_pgio_current_mirror(struct nfs_pageio_descriptor *desc);
254 static inline bool nfs_pgio_has_mirroring(struct nfs_pageio_descriptor *desc)
256 WARN_ON_ONCE(desc->pg_mirror_count < 1);
257 return desc->pg_mirror_count > 1;
260 static inline bool nfs_match_open_context(const struct nfs_open_context *ctx1,
261 const struct nfs_open_context *ctx2)
263 return cred_fscmp(ctx1->cred, ctx2->cred) == 0 && ctx1->state == ctx2->state;
267 extern const struct rpc_procinfo nfs_procedures[];
268 extern int nfs2_decode_dirent(struct xdr_stream *,
269 struct nfs_entry *, bool);
272 extern const struct rpc_procinfo nfs3_procedures[];
273 extern int nfs3_decode_dirent(struct xdr_stream *,
274 struct nfs_entry *, bool);
277 #if IS_ENABLED(CONFIG_NFS_V4)
278 extern int nfs4_decode_dirent(struct xdr_stream *,
279 struct nfs_entry *, bool);
281 #ifdef CONFIG_NFS_V4_1
282 extern const u32 nfs41_maxread_overhead;
283 extern const u32 nfs41_maxwrite_overhead;
284 extern const u32 nfs41_maxgetdevinfo_overhead;
288 #if IS_ENABLED(CONFIG_NFS_V4)
289 extern const struct rpc_procinfo nfs4_procedures[];
292 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
293 extern struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags);
294 static inline struct nfs4_label *
295 nfs4_label_copy(struct nfs4_label *dst, struct nfs4_label *src)
300 if (src->len > NFS4_MAXLABELLEN)
306 memcpy(dst->label, src->label, src->len);
310 static inline void nfs4_label_free(struct nfs4_label *label)
319 static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi)
321 if (nfs_server_capable(&nfsi->vfs_inode, NFS_CAP_SECURITY_LABEL))
322 nfsi->cache_validity |= NFS_INO_INVALID_LABEL;
325 static inline struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags) { return NULL; }
326 static inline void nfs4_label_free(void *label) {}
327 static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi)
330 static inline struct nfs4_label *
331 nfs4_label_copy(struct nfs4_label *dst, struct nfs4_label *src)
335 #endif /* CONFIG_NFS_V4_SECURITY_LABEL */
338 void nfs_close_context(struct nfs_open_context *ctx, int is_sync);
339 extern struct nfs_client *nfs_init_client(struct nfs_client *clp,
340 const struct nfs_client_initdata *);
343 extern void nfs_advise_use_readdirplus(struct inode *dir);
344 extern void nfs_force_use_readdirplus(struct inode *dir);
345 extern unsigned long nfs_access_cache_count(struct shrinker *shrink,
346 struct shrink_control *sc);
347 extern unsigned long nfs_access_cache_scan(struct shrinker *shrink,
348 struct shrink_control *sc);
349 struct dentry *nfs_lookup(struct inode *, struct dentry *, unsigned int);
350 int nfs_create(struct inode *, struct dentry *, umode_t, bool);
351 int nfs_mkdir(struct inode *, struct dentry *, umode_t);
352 int nfs_rmdir(struct inode *, struct dentry *);
353 int nfs_unlink(struct inode *, struct dentry *);
354 int nfs_symlink(struct inode *, struct dentry *, const char *);
355 int nfs_link(struct dentry *, struct inode *, struct dentry *);
356 int nfs_mknod(struct inode *, struct dentry *, umode_t, dev_t);
357 int nfs_rename(struct inode *, struct dentry *,
358 struct inode *, struct dentry *, unsigned int);
361 int nfs_file_fsync(struct file *file, loff_t start, loff_t end, int datasync);
362 loff_t nfs_file_llseek(struct file *, loff_t, int);
363 ssize_t nfs_file_read(struct kiocb *, struct iov_iter *);
364 int nfs_file_mmap(struct file *, struct vm_area_struct *);
365 ssize_t nfs_file_write(struct kiocb *, struct iov_iter *);
366 int nfs_file_release(struct inode *, struct file *);
367 int nfs_lock(struct file *, int, struct file_lock *);
368 int nfs_flock(struct file *, int, struct file_lock *);
369 int nfs_check_flags(int);
372 extern struct workqueue_struct *nfsiod_workqueue;
373 extern struct inode *nfs_alloc_inode(struct super_block *sb);
374 extern void nfs_free_inode(struct inode *);
375 extern int nfs_write_inode(struct inode *, struct writeback_control *);
376 extern int nfs_drop_inode(struct inode *);
377 extern void nfs_clear_inode(struct inode *);
378 extern void nfs_evict_inode(struct inode *);
379 void nfs_zap_acl_cache(struct inode *inode);
380 extern bool nfs_check_cache_invalid(struct inode *, unsigned long);
381 extern int nfs_wait_bit_killable(struct wait_bit_key *key, int mode);
382 extern int nfs_wait_atomic_killable(atomic_t *p, unsigned int mode);
385 extern const struct super_operations nfs_sops;
386 extern struct file_system_type nfs_fs_type;
387 extern struct file_system_type nfs_prepared_fs_type;
388 #if IS_ENABLED(CONFIG_NFS_V4)
389 extern struct file_system_type nfs4_referral_fs_type;
391 bool nfs_auth_info_match(const struct nfs_auth_info *, rpc_authflavor_t);
392 struct dentry *nfs_try_mount(int, const char *, struct nfs_mount_info *);
393 struct dentry *nfs_fs_mount(struct file_system_type *, int, const char *, void *);
394 void nfs_kill_super(struct super_block *);
396 extern struct rpc_stat nfs_rpcstat;
398 extern int __init register_nfs_fs(void);
399 extern void __exit unregister_nfs_fs(void);
400 extern bool nfs_sb_active(struct super_block *sb);
401 extern void nfs_sb_deactive(struct super_block *sb);
404 extern void nfs_start_io_read(struct inode *inode);
405 extern void nfs_end_io_read(struct inode *inode);
406 extern void nfs_start_io_write(struct inode *inode);
407 extern void nfs_end_io_write(struct inode *inode);
408 extern void nfs_start_io_direct(struct inode *inode);
409 extern void nfs_end_io_direct(struct inode *inode);
411 static inline bool nfs_file_io_is_buffered(struct nfs_inode *nfsi)
413 return test_bit(NFS_INO_ODIRECT, &nfsi->flags) == 0;
417 #define NFS_PATH_CANONICAL 1
418 extern char *nfs_path(char **p, struct dentry *dentry,
419 char *buffer, ssize_t buflen, unsigned flags);
420 extern struct vfsmount *nfs_d_automount(struct path *path);
421 struct vfsmount *nfs_submount(struct nfs_server *, struct dentry *,
422 struct nfs_fh *, struct nfs_fattr *);
423 struct vfsmount *nfs_do_submount(struct dentry *, struct nfs_fh *,
424 struct nfs_fattr *, rpc_authflavor_t);
427 extern struct dentry *nfs_get_root(struct super_block *, struct nfs_fh *,
429 #if IS_ENABLED(CONFIG_NFS_V4)
430 extern struct dentry *nfs4_get_root(struct super_block *, struct nfs_fh *,
433 extern int nfs4_get_rootfh(struct nfs_server *server, struct nfs_fh *mntfh, bool);
436 struct nfs_pgio_completion_ops;
438 extern void nfs_pageio_init_read(struct nfs_pageio_descriptor *pgio,
439 struct inode *inode, bool force_mds,
440 const struct nfs_pgio_completion_ops *compl_ops);
441 extern void nfs_read_prepare(struct rpc_task *task, void *calldata);
442 extern void nfs_pageio_reset_read_mds(struct nfs_pageio_descriptor *pgio);
445 void nfs_umount_begin(struct super_block *);
446 int nfs_statfs(struct dentry *, struct kstatfs *);
447 int nfs_show_options(struct seq_file *, struct dentry *);
448 int nfs_show_devname(struct seq_file *, struct dentry *);
449 int nfs_show_path(struct seq_file *, struct dentry *);
450 int nfs_show_stats(struct seq_file *, struct dentry *);
451 int nfs_remount(struct super_block *sb, int *flags, char *raw_data);
454 extern void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio,
455 struct inode *inode, int ioflags, bool force_mds,
456 const struct nfs_pgio_completion_ops *compl_ops);
457 extern void nfs_pageio_reset_write_mds(struct nfs_pageio_descriptor *pgio);
458 extern void nfs_commit_free(struct nfs_commit_data *p);
459 extern void nfs_write_prepare(struct rpc_task *task, void *calldata);
460 extern void nfs_commit_prepare(struct rpc_task *task, void *calldata);
461 extern int nfs_initiate_commit(struct rpc_clnt *clnt,
462 struct nfs_commit_data *data,
463 const struct nfs_rpc_ops *nfs_ops,
464 const struct rpc_call_ops *call_ops,
466 extern void nfs_init_commit(struct nfs_commit_data *data,
467 struct list_head *head,
468 struct pnfs_layout_segment *lseg,
469 struct nfs_commit_info *cinfo);
470 int nfs_scan_commit_list(struct list_head *src, struct list_head *dst,
471 struct nfs_commit_info *cinfo, int max);
472 unsigned long nfs_reqs_to_commit(struct nfs_commit_info *);
473 int nfs_scan_commit(struct inode *inode, struct list_head *dst,
474 struct nfs_commit_info *cinfo);
475 void nfs_mark_request_commit(struct nfs_page *req,
476 struct pnfs_layout_segment *lseg,
477 struct nfs_commit_info *cinfo,
479 int nfs_write_need_commit(struct nfs_pgio_header *);
480 void nfs_writeback_update_inode(struct nfs_pgio_header *hdr);
481 int nfs_generic_commit_list(struct inode *inode, struct list_head *head,
482 int how, struct nfs_commit_info *cinfo);
483 void nfs_retry_commit(struct list_head *page_list,
484 struct pnfs_layout_segment *lseg,
485 struct nfs_commit_info *cinfo,
487 void nfs_commitdata_release(struct nfs_commit_data *data);
488 void nfs_request_add_commit_list(struct nfs_page *req,
489 struct nfs_commit_info *cinfo);
490 void nfs_request_add_commit_list_locked(struct nfs_page *req,
491 struct list_head *dst,
492 struct nfs_commit_info *cinfo);
493 void nfs_request_remove_commit_list(struct nfs_page *req,
494 struct nfs_commit_info *cinfo);
495 void nfs_init_cinfo(struct nfs_commit_info *cinfo,
497 struct nfs_direct_req *dreq);
498 int nfs_key_timeout_notify(struct file *filp, struct inode *inode);
499 bool nfs_ctx_key_to_expire(struct nfs_open_context *ctx, struct inode *inode);
500 void nfs_pageio_stop_mirroring(struct nfs_pageio_descriptor *pgio);
502 int nfs_filemap_write_and_wait_range(struct address_space *mapping,
503 loff_t lstart, loff_t lend);
505 #ifdef CONFIG_NFS_V4_1
507 void nfs_clear_pnfs_ds_commit_verifiers(struct pnfs_ds_commit_info *cinfo)
511 for (i = 0; i < cinfo->nbuckets; i++)
512 cinfo->buckets[i].direct_verf.committed = NFS_INVALID_STABLE_HOW;
516 void nfs_clear_pnfs_ds_commit_verifiers(struct pnfs_ds_commit_info *cinfo)
521 #ifdef CONFIG_MIGRATION
522 extern int nfs_migrate_page(struct address_space *,
523 struct page *, struct page *, enum migrate_mode);
527 nfs_write_verifier_cmp(const struct nfs_write_verifier *v1,
528 const struct nfs_write_verifier *v2)
530 return memcmp(v1->data, v2->data, sizeof(v1->data));
534 extern struct rpc_task *
535 nfs_async_rename(struct inode *old_dir, struct inode *new_dir,
536 struct dentry *old_dentry, struct dentry *new_dentry,
537 void (*complete)(struct rpc_task *, struct nfs_renamedata *));
538 extern int nfs_sillyrename(struct inode *dir, struct dentry *dentry);
541 void nfs_init_cinfo_from_dreq(struct nfs_commit_info *cinfo,
542 struct nfs_direct_req *dreq);
543 extern ssize_t nfs_dreq_bytes_left(struct nfs_direct_req *dreq);
546 extern struct nfs_client *nfs4_init_client(struct nfs_client *clp,
547 const struct nfs_client_initdata *);
548 extern int nfs40_walk_client_list(struct nfs_client *clp,
549 struct nfs_client **result,
550 const struct cred *cred);
551 extern int nfs41_walk_client_list(struct nfs_client *clp,
552 struct nfs_client **result,
553 const struct cred *cred);
554 extern void nfs4_test_session_trunk(struct rpc_clnt *clnt,
555 struct rpc_xprt *xprt,
558 static inline struct inode *nfs_igrab_and_active(struct inode *inode)
560 inode = igrab(inode);
561 if (inode != NULL && !nfs_sb_active(inode->i_sb)) {
568 static inline void nfs_iput_and_deactive(struct inode *inode)
571 struct super_block *sb = inode->i_sb;
579 * Determine the device name as a string
581 static inline char *nfs_devname(struct dentry *dentry,
582 char *buffer, ssize_t buflen)
585 return nfs_path(&dummy, dentry, buffer, buflen, NFS_PATH_CANONICAL);
589 * Determine the actual block size (and log2 thereof)
592 unsigned long nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp)
594 /* make sure blocksize is a power of two */
595 if ((bsize & (bsize - 1)) || nrbitsp) {
596 unsigned char nrbits;
598 for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--)
609 * Calculate the number of 512byte blocks used.
611 static inline blkcnt_t nfs_calc_block_size(u64 tsize)
613 blkcnt_t used = (tsize + 511) >> 9;
614 return (used > ULONG_MAX) ? ULONG_MAX : used;
618 * Compute and set NFS server blocksize
621 unsigned long nfs_block_size(unsigned long bsize, unsigned char *nrbitsp)
623 if (bsize < NFS_MIN_FILE_IO_SIZE)
624 bsize = NFS_DEF_FILE_IO_SIZE;
625 else if (bsize >= NFS_MAX_FILE_IO_SIZE)
626 bsize = NFS_MAX_FILE_IO_SIZE;
628 return nfs_block_bits(bsize, nrbitsp);
632 * Determine the maximum file size for a superblock
635 void nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize)
637 sb->s_maxbytes = (loff_t)maxfilesize;
638 if (sb->s_maxbytes > MAX_LFS_FILESIZE || sb->s_maxbytes <= 0)
639 sb->s_maxbytes = MAX_LFS_FILESIZE;
643 * Record the page as unstable and mark its inode as dirty.
646 void nfs_mark_page_unstable(struct page *page, struct nfs_commit_info *cinfo)
649 struct inode *inode = page_file_mapping(page)->host;
651 inc_node_page_state(page, NR_UNSTABLE_NFS);
652 inc_wb_stat(&inode_to_bdi(inode)->wb, WB_RECLAIMABLE);
653 __mark_inode_dirty(inode, I_DIRTY_DATASYNC);
658 * Determine the number of bytes of data the page contains
661 unsigned int nfs_page_length(struct page *page)
663 loff_t i_size = i_size_read(page_file_mapping(page)->host);
666 pgoff_t index = page_index(page);
667 pgoff_t end_index = (i_size - 1) >> PAGE_SHIFT;
668 if (index < end_index)
670 if (index == end_index)
671 return ((i_size - 1) & ~PAGE_MASK) + 1;
677 * Convert a umode to a dirent->d_type
680 unsigned char nfs_umode_to_dtype(umode_t mode)
682 return (mode >> 12) & 15;
686 * Determine the number of pages in an array of length 'len' and
687 * with a base offset of 'base'
690 unsigned int nfs_page_array_len(unsigned int base, size_t len)
692 return ((unsigned long)len + (unsigned long)base +
693 PAGE_SIZE - 1) >> PAGE_SHIFT;
697 * Convert a struct timespec into a 64-bit change attribute
699 * This does approximately the same thing as timespec_to_ns(),
700 * but for calculation efficiency, we multiply the seconds by
704 u64 nfs_timespec_to_change_attr(const struct timespec64 *ts)
706 return ((u64)ts->tv_sec << 30) + ts->tv_nsec;
711 * nfs_fhandle_hash - calculate the crc32 hash for the filehandle
712 * @fh - pointer to filehandle
714 * returns a crc32 hash for the filehandle that is compatible with
715 * the one displayed by "wireshark".
717 static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh)
719 return ~crc32_le(0xFFFFFFFF, &fh->data[0], fh->size);
721 static inline u32 nfs_stateid_hash(const nfs4_stateid *stateid)
723 return ~crc32_le(0xFFFFFFFF, &stateid->other[0],
724 NFS4_STATEID_OTHER_SIZE);
727 static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh)
731 static inline u32 nfs_stateid_hash(nfs4_stateid *stateid)
737 static inline bool nfs_error_is_fatal(int err)
758 static inline bool nfs_error_is_fatal_on_server(int err)
766 return nfs_error_is_fatal(err);