1
2
3
4
5
6#include "nfs4_fs.h"
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>
12
13#define NFS_MS_MASK (SB_RDONLY|SB_NOSUID|SB_NODEV|SB_NOEXEC|SB_SYNCHRONOUS)
14
15extern const struct export_operations nfs_export_ops;
16
17struct nfs_string;
18
19
20
21
22
23
24
25#define NFS_MAX_READAHEAD (RPC_DEF_SLOT_TABLE - 1)
26
27static inline void nfs_attr_check_mountpoint(struct super_block *parent, struct nfs_fattr *fattr)
28{
29 if (!nfs_fsid_equal(&NFS_SB(parent)->fsid, &fattr->fsid))
30 fattr->valid |= NFS_ATTR_FATTR_MOUNTPOINT;
31}
32
33static inline int nfs_attr_use_mounted_on_fileid(struct nfs_fattr *fattr)
34{
35 if (((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) == 0) ||
36 (((fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT) == 0) &&
37 ((fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) == 0)))
38 return 0;
39 return 1;
40}
41
42struct nfs_clone_mount {
43 const struct super_block *sb;
44 const struct dentry *dentry;
45 struct nfs_fh *fh;
46 struct nfs_fattr *fattr;
47 char *hostname;
48 char *mnt_path;
49 struct sockaddr *addr;
50 size_t addrlen;
51 rpc_authflavor_t authflavor;
52};
53
54
55
56
57
58#define NFS_MAX_SECFLAVORS (12)
59
60
61
62
63#define NFS_UNSPEC_PORT (-1)
64
65#define NFS_UNSPEC_RETRANS (UINT_MAX)
66#define NFS_UNSPEC_TIMEO (UINT_MAX)
67
68
69
70
71
72#define NFS_MAX_READDIR_PAGES 8
73
74struct nfs_client_initdata {
75 unsigned long init_flags;
76 const char *hostname;
77 const struct sockaddr *addr;
78 const char *nodename;
79 const char *ip_addr;
80 size_t addrlen;
81 struct nfs_subversion *nfs_mod;
82 int proto;
83 u32 minorversion;
84 unsigned int nconnect;
85 struct net *net;
86 const struct rpc_timeout *timeparms;
87 const struct cred *cred;
88};
89
90
91
92
93struct nfs_parsed_mount_data {
94 int flags;
95 unsigned int rsize, wsize;
96 unsigned int timeo, retrans;
97 unsigned int acregmin, acregmax,
98 acdirmin, acdirmax;
99 unsigned int namlen;
100 unsigned int options;
101 unsigned int bsize;
102 struct nfs_auth_info auth_info;
103 rpc_authflavor_t selected_flavor;
104 char *client_address;
105 unsigned int version;
106 unsigned int minorversion;
107 char *fscache_uniq;
108 bool need_mount;
109
110 struct {
111 struct sockaddr_storage address;
112 size_t addrlen;
113 char *hostname;
114 u32 version;
115 int port;
116 unsigned short protocol;
117 } mount_server;
118
119 struct {
120 struct sockaddr_storage address;
121 size_t addrlen;
122 char *hostname;
123 char *export_path;
124 int port;
125 unsigned short protocol;
126 unsigned short nconnect;
127 } nfs_server;
128
129 void *lsm_opts;
130 struct net *net;
131};
132
133
134struct nfs_mount_request {
135 struct sockaddr *sap;
136 size_t salen;
137 char *hostname;
138 char *dirpath;
139 u32 version;
140 unsigned short protocol;
141 struct nfs_fh *fh;
142 int noresvport;
143 unsigned int *auth_flav_len;
144 rpc_authflavor_t *auth_flavs;
145 struct net *net;
146};
147
148struct nfs_mount_info {
149 void (*fill_super)(struct super_block *, struct nfs_mount_info *);
150 int (*set_security)(struct super_block *, struct dentry *, struct nfs_mount_info *);
151 struct nfs_parsed_mount_data *parsed;
152 struct nfs_clone_mount *cloned;
153 struct nfs_fh *mntfh;
154};
155
156extern int nfs_mount(struct nfs_mount_request *info);
157extern void nfs_umount(const struct nfs_mount_request *info);
158
159
160extern const struct rpc_program nfs_program;
161extern void nfs_clients_init(struct net *net);
162extern void nfs_clients_exit(struct net *net);
163extern struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *);
164int nfs_create_rpc_client(struct nfs_client *, const struct nfs_client_initdata *, rpc_authflavor_t);
165struct nfs_client *nfs_get_client(const struct nfs_client_initdata *);
166int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *, struct nfs_fattr *);
167void nfs_server_insert_lists(struct nfs_server *);
168void nfs_server_remove_lists(struct nfs_server *);
169void nfs_init_timeout_values(struct rpc_timeout *to, int proto, int timeo, int retrans);
170int nfs_init_server_rpcclient(struct nfs_server *, const struct rpc_timeout *t,
171 rpc_authflavor_t);
172struct nfs_server *nfs_alloc_server(void);
173void nfs_server_copy_userdata(struct nfs_server *, struct nfs_server *);
174
175extern void nfs_put_client(struct nfs_client *);
176extern void nfs_free_client(struct nfs_client *);
177extern struct nfs_client *nfs4_find_client_ident(struct net *, int);
178extern struct nfs_client *
179nfs4_find_client_sessionid(struct net *, const struct sockaddr *,
180 struct nfs4_sessionid *, u32);
181extern struct nfs_server *nfs_create_server(struct nfs_mount_info *,
182 struct nfs_subversion *);
183extern struct nfs_server *nfs4_create_server(
184 struct nfs_mount_info *,
185 struct nfs_subversion *);
186extern struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *,
187 struct nfs_fh *);
188extern int nfs4_update_server(struct nfs_server *server, const char *hostname,
189 struct sockaddr *sap, size_t salen,
190 struct net *net);
191extern void nfs_free_server(struct nfs_server *server);
192extern struct nfs_server *nfs_clone_server(struct nfs_server *,
193 struct nfs_fh *,
194 struct nfs_fattr *,
195 rpc_authflavor_t);
196extern bool nfs_client_init_is_complete(const struct nfs_client *clp);
197extern int nfs_client_init_status(const struct nfs_client *clp);
198extern int nfs_wait_client_init_complete(const struct nfs_client *clp);
199extern void nfs_mark_client_ready(struct nfs_client *clp, int state);
200extern struct nfs_client *nfs4_set_ds_client(struct nfs_server *mds_srv,
201 const struct sockaddr *ds_addr,
202 int ds_addrlen, int ds_proto,
203 unsigned int ds_timeo,
204 unsigned int ds_retrans,
205 u32 minor_version);
206extern struct rpc_clnt *nfs4_find_or_create_ds_client(struct nfs_client *,
207 struct inode *);
208extern struct nfs_client *nfs3_set_ds_client(struct nfs_server *mds_srv,
209 const struct sockaddr *ds_addr, int ds_addrlen,
210 int ds_proto, unsigned int ds_timeo,
211 unsigned int ds_retrans);
212#ifdef CONFIG_PROC_FS
213extern int __init nfs_fs_proc_init(void);
214extern void nfs_fs_proc_exit(void);
215extern int nfs_fs_proc_net_init(struct net *net);
216extern void nfs_fs_proc_net_exit(struct net *net);
217#else
218static inline int nfs_fs_proc_net_init(struct net *net)
219{
220 return 0;
221}
222static inline void nfs_fs_proc_net_exit(struct net *net)
223{
224}
225static inline int nfs_fs_proc_init(void)
226{
227 return 0;
228}
229static inline void nfs_fs_proc_exit(void)
230{
231}
232#endif
233
234
235extern const struct svc_version nfs4_callback_version1;
236extern const struct svc_version nfs4_callback_version4;
237
238struct nfs_pageio_descriptor;
239
240extern int __init nfs_init_nfspagecache(void);
241extern void nfs_destroy_nfspagecache(void);
242extern int __init nfs_init_readpagecache(void);
243extern void nfs_destroy_readpagecache(void);
244extern int __init nfs_init_writepagecache(void);
245extern void nfs_destroy_writepagecache(void);
246
247extern int __init nfs_init_directcache(void);
248extern void nfs_destroy_directcache(void);
249extern void nfs_pgheader_init(struct nfs_pageio_descriptor *desc,
250 struct nfs_pgio_header *hdr,
251 void (*release)(struct nfs_pgio_header *hdr));
252void nfs_set_pgio_error(struct nfs_pgio_header *hdr, int error, loff_t pos);
253int nfs_iocounter_wait(struct nfs_lock_context *l_ctx);
254
255extern const struct nfs_pageio_ops nfs_pgio_rw_ops;
256struct nfs_pgio_header *nfs_pgio_header_alloc(const struct nfs_rw_ops *);
257void nfs_pgio_header_free(struct nfs_pgio_header *);
258int nfs_generic_pgio(struct nfs_pageio_descriptor *, struct nfs_pgio_header *);
259int nfs_initiate_pgio(struct rpc_clnt *clnt, struct nfs_pgio_header *hdr,
260 const struct cred *cred, const struct nfs_rpc_ops *rpc_ops,
261 const struct rpc_call_ops *call_ops, int how, int flags);
262void nfs_free_request(struct nfs_page *req);
263struct nfs_pgio_mirror *
264nfs_pgio_current_mirror(struct nfs_pageio_descriptor *desc);
265
266static inline bool nfs_pgio_has_mirroring(struct nfs_pageio_descriptor *desc)
267{
268 WARN_ON_ONCE(desc->pg_mirror_count < 1);
269 return desc->pg_mirror_count > 1;
270}
271
272static inline bool nfs_match_open_context(const struct nfs_open_context *ctx1,
273 const struct nfs_open_context *ctx2)
274{
275 return cred_fscmp(ctx1->cred, ctx2->cred) == 0 && ctx1->state == ctx2->state;
276}
277
278
279extern const struct rpc_procinfo nfs_procedures[];
280extern int nfs2_decode_dirent(struct xdr_stream *,
281 struct nfs_entry *, bool);
282
283
284extern const struct rpc_procinfo nfs3_procedures[];
285extern int nfs3_decode_dirent(struct xdr_stream *,
286 struct nfs_entry *, bool);
287
288
289#if IS_ENABLED(CONFIG_NFS_V4)
290extern int nfs4_decode_dirent(struct xdr_stream *,
291 struct nfs_entry *, bool);
292#endif
293#ifdef CONFIG_NFS_V4_1
294extern const u32 nfs41_maxread_overhead;
295extern const u32 nfs41_maxwrite_overhead;
296extern const u32 nfs41_maxgetdevinfo_overhead;
297#endif
298
299
300#if IS_ENABLED(CONFIG_NFS_V4)
301extern const struct rpc_procinfo nfs4_procedures[];
302#endif
303
304#ifdef CONFIG_NFS_V4_SECURITY_LABEL
305extern struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags);
306static inline struct nfs4_label *
307nfs4_label_copy(struct nfs4_label *dst, struct nfs4_label *src)
308{
309 if (!dst || !src)
310 return NULL;
311
312 if (src->len > NFS4_MAXLABELLEN)
313 return NULL;
314
315 dst->lfs = src->lfs;
316 dst->pi = src->pi;
317 dst->len = src->len;
318 memcpy(dst->label, src->label, src->len);
319
320 return dst;
321}
322static inline void nfs4_label_free(struct nfs4_label *label)
323{
324 if (label) {
325 kfree(label->label);
326 kfree(label);
327 }
328 return;
329}
330
331static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi)
332{
333 if (nfs_server_capable(&nfsi->vfs_inode, NFS_CAP_SECURITY_LABEL))
334 nfsi->cache_validity |= NFS_INO_INVALID_LABEL;
335}
336#else
337static inline struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags) { return NULL; }
338static inline void nfs4_label_free(void *label) {}
339static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi)
340{
341}
342static inline struct nfs4_label *
343nfs4_label_copy(struct nfs4_label *dst, struct nfs4_label *src)
344{
345 return NULL;
346}
347#endif
348
349
350void nfs_close_context(struct nfs_open_context *ctx, int is_sync);
351extern struct nfs_client *nfs_init_client(struct nfs_client *clp,
352 const struct nfs_client_initdata *);
353
354
355extern void nfs_advise_use_readdirplus(struct inode *dir);
356extern void nfs_force_use_readdirplus(struct inode *dir);
357extern unsigned long nfs_access_cache_count(struct shrinker *shrink,
358 struct shrink_control *sc);
359extern unsigned long nfs_access_cache_scan(struct shrinker *shrink,
360 struct shrink_control *sc);
361struct dentry *nfs_lookup(struct inode *, struct dentry *, unsigned int);
362int nfs_create(struct inode *, struct dentry *, umode_t, bool);
363int nfs_mkdir(struct inode *, struct dentry *, umode_t);
364int nfs_rmdir(struct inode *, struct dentry *);
365int nfs_unlink(struct inode *, struct dentry *);
366int nfs_symlink(struct inode *, struct dentry *, const char *);
367int nfs_link(struct dentry *, struct inode *, struct dentry *);
368int nfs_mknod(struct inode *, struct dentry *, umode_t, dev_t);
369int nfs_rename(struct inode *, struct dentry *,
370 struct inode *, struct dentry *, unsigned int);
371
372
373int nfs_file_fsync(struct file *file, loff_t start, loff_t end, int datasync);
374loff_t nfs_file_llseek(struct file *, loff_t, int);
375ssize_t nfs_file_read(struct kiocb *, struct iov_iter *);
376int nfs_file_mmap(struct file *, struct vm_area_struct *);
377ssize_t nfs_file_write(struct kiocb *, struct iov_iter *);
378int nfs_file_release(struct inode *, struct file *);
379int nfs_lock(struct file *, int, struct file_lock *);
380int nfs_flock(struct file *, int, struct file_lock *);
381int nfs_check_flags(int);
382
383
384extern struct workqueue_struct *nfsiod_workqueue;
385extern struct inode *nfs_alloc_inode(struct super_block *sb);
386extern void nfs_free_inode(struct inode *);
387extern int nfs_write_inode(struct inode *, struct writeback_control *);
388extern int nfs_drop_inode(struct inode *);
389extern void nfs_clear_inode(struct inode *);
390extern void nfs_evict_inode(struct inode *);
391void nfs_zap_acl_cache(struct inode *inode);
392extern bool nfs_check_cache_invalid(struct inode *, unsigned long);
393extern int nfs_wait_bit_killable(struct wait_bit_key *key, int mode);
394extern int nfs_wait_atomic_killable(atomic_t *p, unsigned int mode);
395
396
397extern const struct super_operations nfs_sops;
398extern struct file_system_type nfs_fs_type;
399extern struct file_system_type nfs_xdev_fs_type;
400#if IS_ENABLED(CONFIG_NFS_V4)
401extern struct file_system_type nfs4_referral_fs_type;
402#endif
403bool nfs_auth_info_match(const struct nfs_auth_info *, rpc_authflavor_t);
404struct dentry *nfs_try_mount(int, const char *, struct nfs_mount_info *,
405 struct nfs_subversion *);
406int nfs_set_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *);
407int nfs_clone_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *);
408struct dentry *nfs_fs_mount_common(struct nfs_server *, int, const char *,
409 struct nfs_mount_info *, struct nfs_subversion *);
410struct dentry *nfs_fs_mount(struct file_system_type *, int, const char *, void *);
411struct dentry * nfs_xdev_mount_common(struct file_system_type *, int,
412 const char *, struct nfs_mount_info *);
413void nfs_kill_super(struct super_block *);
414void nfs_fill_super(struct super_block *, struct nfs_mount_info *);
415
416extern struct rpc_stat nfs_rpcstat;
417
418extern int __init register_nfs_fs(void);
419extern void __exit unregister_nfs_fs(void);
420extern bool nfs_sb_active(struct super_block *sb);
421extern void nfs_sb_deactive(struct super_block *sb);
422
423
424extern void nfs_start_io_read(struct inode *inode);
425extern void nfs_end_io_read(struct inode *inode);
426extern void nfs_start_io_write(struct inode *inode);
427extern void nfs_end_io_write(struct inode *inode);
428extern void nfs_start_io_direct(struct inode *inode);
429extern void nfs_end_io_direct(struct inode *inode);
430
431static inline bool nfs_file_io_is_buffered(struct nfs_inode *nfsi)
432{
433 return test_bit(NFS_INO_ODIRECT, &nfsi->flags) == 0;
434}
435
436
437#define NFS_PATH_CANONICAL 1
438extern char *nfs_path(char **p, struct dentry *dentry,
439 char *buffer, ssize_t buflen, unsigned flags);
440extern struct vfsmount *nfs_d_automount(struct path *path);
441struct vfsmount *nfs_submount(struct nfs_server *, struct dentry *,
442 struct nfs_fh *, struct nfs_fattr *);
443struct vfsmount *nfs_do_submount(struct dentry *, struct nfs_fh *,
444 struct nfs_fattr *, rpc_authflavor_t);
445
446
447extern struct dentry *nfs_get_root(struct super_block *, struct nfs_fh *,
448 const char *);
449#if IS_ENABLED(CONFIG_NFS_V4)
450extern struct dentry *nfs4_get_root(struct super_block *, struct nfs_fh *,
451 const char *);
452
453extern int nfs4_get_rootfh(struct nfs_server *server, struct nfs_fh *mntfh, bool);
454#endif
455
456struct nfs_pgio_completion_ops;
457
458extern void nfs_pageio_init_read(struct nfs_pageio_descriptor *pgio,
459 struct inode *inode, bool force_mds,
460 const struct nfs_pgio_completion_ops *compl_ops);
461extern void nfs_read_prepare(struct rpc_task *task, void *calldata);
462extern void nfs_pageio_reset_read_mds(struct nfs_pageio_descriptor *pgio);
463
464
465void nfs_umount_begin(struct super_block *);
466int nfs_statfs(struct dentry *, struct kstatfs *);
467int nfs_show_options(struct seq_file *, struct dentry *);
468int nfs_show_devname(struct seq_file *, struct dentry *);
469int nfs_show_path(struct seq_file *, struct dentry *);
470int nfs_show_stats(struct seq_file *, struct dentry *);
471int nfs_remount(struct super_block *sb, int *flags, char *raw_data);
472
473
474extern void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio,
475 struct inode *inode, int ioflags, bool force_mds,
476 const struct nfs_pgio_completion_ops *compl_ops);
477extern void nfs_pageio_reset_write_mds(struct nfs_pageio_descriptor *pgio);
478extern void nfs_commit_free(struct nfs_commit_data *p);
479extern void nfs_write_prepare(struct rpc_task *task, void *calldata);
480extern void nfs_commit_prepare(struct rpc_task *task, void *calldata);
481extern int nfs_initiate_commit(struct rpc_clnt *clnt,
482 struct nfs_commit_data *data,
483 const struct nfs_rpc_ops *nfs_ops,
484 const struct rpc_call_ops *call_ops,
485 int how, int flags);
486extern void nfs_init_commit(struct nfs_commit_data *data,
487 struct list_head *head,
488 struct pnfs_layout_segment *lseg,
489 struct nfs_commit_info *cinfo);
490int nfs_scan_commit_list(struct list_head *src, struct list_head *dst,
491 struct nfs_commit_info *cinfo, int max);
492unsigned long nfs_reqs_to_commit(struct nfs_commit_info *);
493int nfs_scan_commit(struct inode *inode, struct list_head *dst,
494 struct nfs_commit_info *cinfo);
495void nfs_mark_request_commit(struct nfs_page *req,
496 struct pnfs_layout_segment *lseg,
497 struct nfs_commit_info *cinfo,
498 u32 ds_commit_idx);
499int nfs_write_need_commit(struct nfs_pgio_header *);
500void nfs_writeback_update_inode(struct nfs_pgio_header *hdr);
501int nfs_generic_commit_list(struct inode *inode, struct list_head *head,
502 int how, struct nfs_commit_info *cinfo);
503void nfs_retry_commit(struct list_head *page_list,
504 struct pnfs_layout_segment *lseg,
505 struct nfs_commit_info *cinfo,
506 u32 ds_commit_idx);
507void nfs_commitdata_release(struct nfs_commit_data *data);
508void nfs_request_add_commit_list(struct nfs_page *req,
509 struct nfs_commit_info *cinfo);
510void nfs_request_add_commit_list_locked(struct nfs_page *req,
511 struct list_head *dst,
512 struct nfs_commit_info *cinfo);
513void nfs_request_remove_commit_list(struct nfs_page *req,
514 struct nfs_commit_info *cinfo);
515void nfs_init_cinfo(struct nfs_commit_info *cinfo,
516 struct inode *inode,
517 struct nfs_direct_req *dreq);
518int nfs_key_timeout_notify(struct file *filp, struct inode *inode);
519bool nfs_ctx_key_to_expire(struct nfs_open_context *ctx, struct inode *inode);
520void nfs_pageio_stop_mirroring(struct nfs_pageio_descriptor *pgio);
521
522int nfs_filemap_write_and_wait_range(struct address_space *mapping,
523 loff_t lstart, loff_t lend);
524
525#ifdef CONFIG_NFS_V4_1
526static inline
527void nfs_clear_pnfs_ds_commit_verifiers(struct pnfs_ds_commit_info *cinfo)
528{
529 int i;
530
531 for (i = 0; i < cinfo->nbuckets; i++)
532 cinfo->buckets[i].direct_verf.committed = NFS_INVALID_STABLE_HOW;
533}
534#else
535static inline
536void nfs_clear_pnfs_ds_commit_verifiers(struct pnfs_ds_commit_info *cinfo)
537{
538}
539#endif
540
541#ifdef CONFIG_MIGRATION
542extern int nfs_migrate_page(struct address_space *,
543 struct page *, struct page *, enum migrate_mode);
544#endif
545
546static inline int
547nfs_write_verifier_cmp(const struct nfs_write_verifier *v1,
548 const struct nfs_write_verifier *v2)
549{
550 return memcmp(v1->data, v2->data, sizeof(v1->data));
551}
552
553
554extern struct rpc_task *
555nfs_async_rename(struct inode *old_dir, struct inode *new_dir,
556 struct dentry *old_dentry, struct dentry *new_dentry,
557 void (*complete)(struct rpc_task *, struct nfs_renamedata *));
558extern int nfs_sillyrename(struct inode *dir, struct dentry *dentry);
559
560
561void nfs_init_cinfo_from_dreq(struct nfs_commit_info *cinfo,
562 struct nfs_direct_req *dreq);
563extern ssize_t nfs_dreq_bytes_left(struct nfs_direct_req *dreq);
564
565
566extern struct nfs_client *nfs4_init_client(struct nfs_client *clp,
567 const struct nfs_client_initdata *);
568extern int nfs40_walk_client_list(struct nfs_client *clp,
569 struct nfs_client **result,
570 const struct cred *cred);
571extern int nfs41_walk_client_list(struct nfs_client *clp,
572 struct nfs_client **result,
573 const struct cred *cred);
574extern void nfs4_test_session_trunk(struct rpc_clnt *clnt,
575 struct rpc_xprt *xprt,
576 void *data);
577
578static inline struct inode *nfs_igrab_and_active(struct inode *inode)
579{
580 inode = igrab(inode);
581 if (inode != NULL && !nfs_sb_active(inode->i_sb)) {
582 iput(inode);
583 inode = NULL;
584 }
585 return inode;
586}
587
588static inline void nfs_iput_and_deactive(struct inode *inode)
589{
590 if (inode != NULL) {
591 struct super_block *sb = inode->i_sb;
592
593 iput(inode);
594 nfs_sb_deactive(sb);
595 }
596}
597
598
599
600
601static inline char *nfs_devname(struct dentry *dentry,
602 char *buffer, ssize_t buflen)
603{
604 char *dummy;
605 return nfs_path(&dummy, dentry, buffer, buflen, NFS_PATH_CANONICAL);
606}
607
608
609
610
611static inline
612unsigned long nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp)
613{
614
615 if ((bsize & (bsize - 1)) || nrbitsp) {
616 unsigned char nrbits;
617
618 for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--)
619 ;
620 bsize = 1 << nrbits;
621 if (nrbitsp)
622 *nrbitsp = nrbits;
623 }
624
625 return bsize;
626}
627
628
629
630
631static inline blkcnt_t nfs_calc_block_size(u64 tsize)
632{
633 blkcnt_t used = (tsize + 511) >> 9;
634 return (used > ULONG_MAX) ? ULONG_MAX : used;
635}
636
637
638
639
640static inline
641unsigned long nfs_block_size(unsigned long bsize, unsigned char *nrbitsp)
642{
643 if (bsize < NFS_MIN_FILE_IO_SIZE)
644 bsize = NFS_DEF_FILE_IO_SIZE;
645 else if (bsize >= NFS_MAX_FILE_IO_SIZE)
646 bsize = NFS_MAX_FILE_IO_SIZE;
647
648 return nfs_block_bits(bsize, nrbitsp);
649}
650
651
652
653
654static inline
655void nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize)
656{
657 sb->s_maxbytes = (loff_t)maxfilesize;
658 if (sb->s_maxbytes > MAX_LFS_FILESIZE || sb->s_maxbytes <= 0)
659 sb->s_maxbytes = MAX_LFS_FILESIZE;
660}
661
662
663
664
665static inline
666void nfs_mark_page_unstable(struct page *page, struct nfs_commit_info *cinfo)
667{
668 if (!cinfo->dreq) {
669 struct inode *inode = page_file_mapping(page)->host;
670
671 inc_node_page_state(page, NR_UNSTABLE_NFS);
672 inc_wb_stat(&inode_to_bdi(inode)->wb, WB_RECLAIMABLE);
673 __mark_inode_dirty(inode, I_DIRTY_DATASYNC);
674 }
675}
676
677
678
679
680static inline
681unsigned int nfs_page_length(struct page *page)
682{
683 loff_t i_size = i_size_read(page_file_mapping(page)->host);
684
685 if (i_size > 0) {
686 pgoff_t index = page_index(page);
687 pgoff_t end_index = (i_size - 1) >> PAGE_SHIFT;
688 if (index < end_index)
689 return PAGE_SIZE;
690 if (index == end_index)
691 return ((i_size - 1) & ~PAGE_MASK) + 1;
692 }
693 return 0;
694}
695
696
697
698
699static inline
700unsigned char nfs_umode_to_dtype(umode_t mode)
701{
702 return (mode >> 12) & 15;
703}
704
705
706
707
708
709static inline
710unsigned int nfs_page_array_len(unsigned int base, size_t len)
711{
712 return ((unsigned long)len + (unsigned long)base +
713 PAGE_SIZE - 1) >> PAGE_SHIFT;
714}
715
716
717
718
719
720
721
722
723static inline
724u64 nfs_timespec_to_change_attr(const struct timespec *ts)
725{
726 return ((u64)ts->tv_sec << 30) + ts->tv_nsec;
727}
728
729#ifdef CONFIG_CRC32
730
731
732
733
734
735
736
737static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh)
738{
739 return ~crc32_le(0xFFFFFFFF, &fh->data[0], fh->size);
740}
741static inline u32 nfs_stateid_hash(const nfs4_stateid *stateid)
742{
743 return ~crc32_le(0xFFFFFFFF, &stateid->other[0],
744 NFS4_STATEID_OTHER_SIZE);
745}
746#else
747static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh)
748{
749 return 0;
750}
751static inline u32 nfs_stateid_hash(nfs4_stateid *stateid)
752{
753 return 0;
754}
755#endif
756
757static inline bool nfs_error_is_fatal(int err)
758{
759 switch (err) {
760 case -ERESTARTSYS:
761 case -EINTR:
762 case -EACCES:
763 case -EDQUOT:
764 case -EFBIG:
765 case -EIO:
766 case -ENOSPC:
767 case -EROFS:
768 case -ESTALE:
769 case -E2BIG:
770 case -ENOMEM:
771 case -ETIMEDOUT:
772 return true;
773 default:
774 return false;
775 }
776}
777
778static inline bool nfs_error_is_fatal_on_server(int err)
779{
780 switch (err) {
781 case 0:
782 case -ERESTARTSYS:
783 case -EINTR:
784 return false;
785 }
786 return nfs_error_is_fatal(err);
787}
788
