1
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4
5
6#include "nfs4_fs.h"
7#include <linux/fs_context.h>
8#include <linux/security.h>
9#include <linux/crc32.h>
10#include <linux/sunrpc/addr.h>
11#include <linux/nfs_page.h>
12#include <linux/wait_bit.h>
13
14#define NFS_SB_MASK (SB_RDONLY|SB_NOSUID|SB_NODEV|SB_NOEXEC|SB_SYNCHRONOUS)
15
16extern const struct export_operations nfs_export_ops;
17
18struct nfs_string;
19struct nfs_pageio_descriptor;
20
21static inline void nfs_attr_check_mountpoint(struct super_block *parent, struct nfs_fattr *fattr)
22{
23 if (!nfs_fsid_equal(&NFS_SB(parent)->fsid, &fattr->fsid))
24 fattr->valid |= NFS_ATTR_FATTR_MOUNTPOINT;
25}
26
27static inline int nfs_attr_use_mounted_on_fileid(struct nfs_fattr *fattr)
28{
29 if (((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) == 0) ||
30 (((fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT) == 0) &&
31 ((fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) == 0)))
32 return 0;
33 return 1;
34}
35
36static inline bool nfs_lookup_is_soft_revalidate(const struct dentry *dentry)
37{
38 if (!(NFS_SB(dentry->d_sb)->flags & NFS_MOUNT_SOFTREVAL))
39 return false;
40 if (!d_is_positive(dentry) || !NFS_FH(d_inode(dentry))->size)
41 return false;
42 return true;
43}
44
45
46
47
48
49#define NFS_MAX_SECFLAVORS (12)
50
51
52
53
54#define NFS_UNSPEC_PORT (-1)
55
56#define NFS_UNSPEC_RETRANS (UINT_MAX)
57#define NFS_UNSPEC_TIMEO (UINT_MAX)
58
59struct nfs_client_initdata {
60 unsigned long init_flags;
61 const char *hostname;
62 const struct sockaddr *addr;
63 const char *nodename;
64 const char *ip_addr;
65 size_t addrlen;
66 struct nfs_subversion *nfs_mod;
67 int proto;
68 u32 minorversion;
69 unsigned int nconnect;
70 struct net *net;
71 const struct rpc_timeout *timeparms;
72 const struct cred *cred;
73};
74
75
76
77
78struct nfs_fs_context {
79 bool internal;
80 bool skip_reconfig_option_check;
81 bool need_mount;
82 bool sloppy;
83 unsigned int flags;
84 unsigned int rsize, wsize;
85 unsigned int timeo, retrans;
86 unsigned int acregmin, acregmax;
87 unsigned int acdirmin, acdirmax;
88 unsigned int namlen;
89 unsigned int options;
90 unsigned int bsize;
91 struct nfs_auth_info auth_info;
92 rpc_authflavor_t selected_flavor;
93 char *client_address;
94 unsigned int version;
95 unsigned int minorversion;
96 char *fscache_uniq;
97 unsigned short protofamily;
98 unsigned short mountfamily;
99
100 struct {
101 union {
102 struct sockaddr address;
103 struct sockaddr_storage _address;
104 };
105 size_t addrlen;
106 char *hostname;
107 u32 version;
108 int port;
109 unsigned short protocol;
110 } mount_server;
111
112 struct {
113 union {
114 struct sockaddr address;
115 struct sockaddr_storage _address;
116 };
117 size_t addrlen;
118 char *hostname;
119 char *export_path;
120 int port;
121 unsigned short protocol;
122 unsigned short nconnect;
123 unsigned short export_path_len;
124 } nfs_server;
125
126 struct nfs_fh *mntfh;
127 struct nfs_server *server;
128 struct nfs_subversion *nfs_mod;
129
130
131 struct nfs_clone_mount {
132 struct super_block *sb;
133 struct dentry *dentry;
134 struct nfs_fattr *fattr;
135 unsigned int inherited_bsize;
136 } clone_data;
137};
138
139#define nfs_errorf(fc, fmt, ...) ((fc)->log.log ? \
140 errorf(fc, fmt, ## __VA_ARGS__) : \
141 ({ dprintk(fmt "\n", ## __VA_ARGS__); }))
142
143#define nfs_ferrorf(fc, fac, fmt, ...) ((fc)->log.log ? \
144 errorf(fc, fmt, ## __VA_ARGS__) : \
145 ({ dfprintk(fac, fmt "\n", ## __VA_ARGS__); }))
146
147#define nfs_invalf(fc, fmt, ...) ((fc)->log.log ? \
148 invalf(fc, fmt, ## __VA_ARGS__) : \
149 ({ dprintk(fmt "\n", ## __VA_ARGS__); -EINVAL; }))
150
151#define nfs_finvalf(fc, fac, fmt, ...) ((fc)->log.log ? \
152 invalf(fc, fmt, ## __VA_ARGS__) : \
153 ({ dfprintk(fac, fmt "\n", ## __VA_ARGS__); -EINVAL; }))
154
155#define nfs_warnf(fc, fmt, ...) ((fc)->log.log ? \
156 warnf(fc, fmt, ## __VA_ARGS__) : \
157 ({ dprintk(fmt "\n", ## __VA_ARGS__); }))
158
159#define nfs_fwarnf(fc, fac, fmt, ...) ((fc)->log.log ? \
160 warnf(fc, fmt, ## __VA_ARGS__) : \
161 ({ dfprintk(fac, fmt "\n", ## __VA_ARGS__); }))
162
163static inline struct nfs_fs_context *nfs_fc2context(const struct fs_context *fc)
164{
165 return fc->fs_private;
166}
167
168
169struct nfs_mount_request {
170 struct sockaddr *sap;
171 size_t salen;
172 char *hostname;
173 char *dirpath;
174 u32 version;
175 unsigned short protocol;
176 struct nfs_fh *fh;
177 int noresvport;
178 unsigned int *auth_flav_len;
179 rpc_authflavor_t *auth_flavs;
180 struct net *net;
181};
182
183extern int nfs_mount(struct nfs_mount_request *info);
184extern void nfs_umount(const struct nfs_mount_request *info);
185
186
187extern const struct rpc_program nfs_program;
188extern void nfs_clients_init(struct net *net);
189extern void nfs_clients_exit(struct net *net);
190extern struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *);
191int nfs_create_rpc_client(struct nfs_client *, const struct nfs_client_initdata *, rpc_authflavor_t);
192struct nfs_client *nfs_get_client(const struct nfs_client_initdata *);
193int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *, struct nfs_fattr *);
194void nfs_server_insert_lists(struct nfs_server *);
195void nfs_server_remove_lists(struct nfs_server *);
196void nfs_init_timeout_values(struct rpc_timeout *to, int proto, int timeo, int retrans);
197int nfs_init_server_rpcclient(struct nfs_server *, const struct rpc_timeout *t,
198 rpc_authflavor_t);
199struct nfs_server *nfs_alloc_server(void);
200void nfs_server_copy_userdata(struct nfs_server *, struct nfs_server *);
201
202extern void nfs_put_client(struct nfs_client *);
203extern void nfs_free_client(struct nfs_client *);
204extern struct nfs_client *nfs4_find_client_ident(struct net *, int);
205extern struct nfs_client *
206nfs4_find_client_sessionid(struct net *, const struct sockaddr *,
207 struct nfs4_sessionid *, u32);
208extern struct nfs_server *nfs_create_server(struct fs_context *);
209extern struct nfs_server *nfs4_create_server(struct fs_context *);
210extern struct nfs_server *nfs4_create_referral_server(struct fs_context *);
211extern int nfs4_update_server(struct nfs_server *server, const char *hostname,
212 struct sockaddr *sap, size_t salen,
213 struct net *net);
214extern void nfs_free_server(struct nfs_server *server);
215extern struct nfs_server *nfs_clone_server(struct nfs_server *,
216 struct nfs_fh *,
217 struct nfs_fattr *,
218 rpc_authflavor_t);
219extern bool nfs_client_init_is_complete(const struct nfs_client *clp);
220extern int nfs_client_init_status(const struct nfs_client *clp);
221extern int nfs_wait_client_init_complete(const struct nfs_client *clp);
222extern void nfs_mark_client_ready(struct nfs_client *clp, int state);
223extern struct nfs_client *nfs4_set_ds_client(struct nfs_server *mds_srv,
224 const struct sockaddr *ds_addr,
225 int ds_addrlen, int ds_proto,
226 unsigned int ds_timeo,
227 unsigned int ds_retrans,
228 u32 minor_version);
229extern struct rpc_clnt *nfs4_find_or_create_ds_client(struct nfs_client *,
230 struct inode *);
231extern struct nfs_client *nfs3_set_ds_client(struct nfs_server *mds_srv,
232 const struct sockaddr *ds_addr, int ds_addrlen,
233 int ds_proto, unsigned int ds_timeo,
234 unsigned int ds_retrans);
235#ifdef CONFIG_PROC_FS
236extern int __init nfs_fs_proc_init(void);
237extern void nfs_fs_proc_exit(void);
238extern int nfs_fs_proc_net_init(struct net *net);
239extern void nfs_fs_proc_net_exit(struct net *net);
240#else
241static inline int nfs_fs_proc_net_init(struct net *net)
242{
243 return 0;
244}
245static inline void nfs_fs_proc_net_exit(struct net *net)
246{
247}
248static inline int nfs_fs_proc_init(void)
249{
250 return 0;
251}
252static inline void nfs_fs_proc_exit(void)
253{
254}
255#endif
256
257
258extern const struct svc_version nfs4_callback_version1;
259extern const struct svc_version nfs4_callback_version4;
260
261
262extern struct file_system_type nfs_fs_type;
263
264
265extern int __init nfs_init_nfspagecache(void);
266extern void nfs_destroy_nfspagecache(void);
267extern int __init nfs_init_readpagecache(void);
268extern void nfs_destroy_readpagecache(void);
269extern int __init nfs_init_writepagecache(void);
270extern void nfs_destroy_writepagecache(void);
271
272extern int __init nfs_init_directcache(void);
273extern void nfs_destroy_directcache(void);
274extern void nfs_pgheader_init(struct nfs_pageio_descriptor *desc,
275 struct nfs_pgio_header *hdr,
276 void (*release)(struct nfs_pgio_header *hdr));
277void nfs_set_pgio_error(struct nfs_pgio_header *hdr, int error, loff_t pos);
278int nfs_iocounter_wait(struct nfs_lock_context *l_ctx);
279
280extern const struct nfs_pageio_ops nfs_pgio_rw_ops;
281struct nfs_pgio_header *nfs_pgio_header_alloc(const struct nfs_rw_ops *);
282void nfs_pgio_header_free(struct nfs_pgio_header *);
283int nfs_generic_pgio(struct nfs_pageio_descriptor *, struct nfs_pgio_header *);
284int nfs_initiate_pgio(struct rpc_clnt *clnt, struct nfs_pgio_header *hdr,
285 const struct cred *cred, const struct nfs_rpc_ops *rpc_ops,
286 const struct rpc_call_ops *call_ops, int how, int flags);
287void nfs_free_request(struct nfs_page *req);
288struct nfs_pgio_mirror *
289nfs_pgio_current_mirror(struct nfs_pageio_descriptor *desc);
290
291static inline bool nfs_match_open_context(const struct nfs_open_context *ctx1,
292 const struct nfs_open_context *ctx2)
293{
294 return cred_fscmp(ctx1->cred, ctx2->cred) == 0 && ctx1->state == ctx2->state;
295}
296
297
298extern const struct rpc_procinfo nfs_procedures[];
299extern int nfs2_decode_dirent(struct xdr_stream *,
300 struct nfs_entry *, bool);
301
302
303extern const struct rpc_procinfo nfs3_procedures[];
304extern int nfs3_decode_dirent(struct xdr_stream *,
305 struct nfs_entry *, bool);
306
307
308#if IS_ENABLED(CONFIG_NFS_V4)
309extern int nfs4_decode_dirent(struct xdr_stream *,
310 struct nfs_entry *, bool);
311#endif
312#ifdef CONFIG_NFS_V4_1
313extern const u32 nfs41_maxread_overhead;
314extern const u32 nfs41_maxwrite_overhead;
315extern const u32 nfs41_maxgetdevinfo_overhead;
316#endif
317
318
319#if IS_ENABLED(CONFIG_NFS_V4)
320extern const struct rpc_procinfo nfs4_procedures[];
321#endif
322
323#ifdef CONFIG_NFS_V4_SECURITY_LABEL
324extern struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags);
325static inline struct nfs4_label *
326nfs4_label_copy(struct nfs4_label *dst, struct nfs4_label *src)
327{
328 if (!dst || !src)
329 return NULL;
330
331 if (src->len > NFS4_MAXLABELLEN)
332 return NULL;
333
334 dst->lfs = src->lfs;
335 dst->pi = src->pi;
336 dst->len = src->len;
337 memcpy(dst->label, src->label, src->len);
338
339 return dst;
340}
341static inline void nfs4_label_free(struct nfs4_label *label)
342{
343 if (label) {
344 kfree(label->label);
345 kfree(label);
346 }
347 return;
348}
349
350static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi)
351{
352 if (nfs_server_capable(&nfsi->vfs_inode, NFS_CAP_SECURITY_LABEL))
353 nfsi->cache_validity |= NFS_INO_INVALID_LABEL;
354}
355#else
356static inline struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags) { return NULL; }
357static inline void nfs4_label_free(void *label) {}
358static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi)
359{
360}
361static inline struct nfs4_label *
362nfs4_label_copy(struct nfs4_label *dst, struct nfs4_label *src)
363{
364 return NULL;
365}
366#endif
367
368
369void nfs_close_context(struct nfs_open_context *ctx, int is_sync);
370extern struct nfs_client *nfs_init_client(struct nfs_client *clp,
371 const struct nfs_client_initdata *);
372
373
374extern void nfs_advise_use_readdirplus(struct inode *dir);
375extern void nfs_force_use_readdirplus(struct inode *dir);
376extern unsigned long nfs_access_cache_count(struct shrinker *shrink,
377 struct shrink_control *sc);
378extern unsigned long nfs_access_cache_scan(struct shrinker *shrink,
379 struct shrink_control *sc);
380struct dentry *nfs_lookup(struct inode *, struct dentry *, unsigned int);
381int nfs_create(struct inode *, struct dentry *, umode_t, bool);
382int nfs_mkdir(struct inode *, struct dentry *, umode_t);
383int nfs_rmdir(struct inode *, struct dentry *);
384int nfs_unlink(struct inode *, struct dentry *);
385int nfs_symlink(struct inode *, struct dentry *, const char *);
386int nfs_link(struct dentry *, struct inode *, struct dentry *);
387int nfs_mknod(struct inode *, struct dentry *, umode_t, dev_t);
388int nfs_rename(struct inode *, struct dentry *,
389 struct inode *, struct dentry *, unsigned int);
390
391
392int nfs_file_fsync(struct file *file, loff_t start, loff_t end, int datasync);
393loff_t nfs_file_llseek(struct file *, loff_t, int);
394ssize_t nfs_file_read(struct kiocb *, struct iov_iter *);
395int nfs_file_mmap(struct file *, struct vm_area_struct *);
396ssize_t nfs_file_write(struct kiocb *, struct iov_iter *);
397int nfs_file_release(struct inode *, struct file *);
398int nfs_lock(struct file *, int, struct file_lock *);
399int nfs_flock(struct file *, int, struct file_lock *);
400int nfs_check_flags(int);
401
402
403extern struct workqueue_struct *nfsiod_workqueue;
404extern struct inode *nfs_alloc_inode(struct super_block *sb);
405extern void nfs_free_inode(struct inode *);
406extern int nfs_write_inode(struct inode *, struct writeback_control *);
407extern int nfs_drop_inode(struct inode *);
408extern void nfs_clear_inode(struct inode *);
409extern void nfs_evict_inode(struct inode *);
410void nfs_zap_acl_cache(struct inode *inode);
411extern bool nfs_check_cache_invalid(struct inode *, unsigned long);
412extern int nfs_wait_bit_killable(struct wait_bit_key *key, int mode);
413extern int nfs_wait_atomic_killable(atomic_t *p, unsigned int mode);
414
415
416extern const struct super_operations nfs_sops;
417bool nfs_auth_info_match(const struct nfs_auth_info *, rpc_authflavor_t);
418int nfs_try_get_tree(struct fs_context *);
419int nfs_get_tree_common(struct fs_context *);
420void nfs_kill_super(struct super_block *);
421
422extern struct rpc_stat nfs_rpcstat;
423
424extern int __init register_nfs_fs(void);
425extern void __exit unregister_nfs_fs(void);
426extern bool nfs_sb_active(struct super_block *sb);
427extern void nfs_sb_deactive(struct super_block *sb);
428extern int nfs_client_for_each_server(struct nfs_client *clp,
429 int (*fn)(struct nfs_server *, void *),
430 void *data);
431
432extern void nfs_start_io_read(struct inode *inode);
433extern void nfs_end_io_read(struct inode *inode);
434extern void nfs_start_io_write(struct inode *inode);
435extern void nfs_end_io_write(struct inode *inode);
436extern void nfs_start_io_direct(struct inode *inode);
437extern void nfs_end_io_direct(struct inode *inode);
438
439static inline bool nfs_file_io_is_buffered(struct nfs_inode *nfsi)
440{
441 return test_bit(NFS_INO_ODIRECT, &nfsi->flags) == 0;
442}
443
444
445#define NFS_PATH_CANONICAL 1
446extern char *nfs_path(char **p, struct dentry *dentry,
447 char *buffer, ssize_t buflen, unsigned flags);
448extern struct vfsmount *nfs_d_automount(struct path *path);
449int nfs_submount(struct fs_context *, struct nfs_server *);
450int nfs_do_submount(struct fs_context *);
451
452
453extern int nfs_get_root(struct super_block *s, struct fs_context *fc);
454#if IS_ENABLED(CONFIG_NFS_V4)
455extern int nfs4_get_rootfh(struct nfs_server *server, struct nfs_fh *mntfh, bool);
456#endif
457
458struct nfs_pgio_completion_ops;
459
460extern void nfs_pageio_init_read(struct nfs_pageio_descriptor *pgio,
461 struct inode *inode, bool force_mds,
462 const struct nfs_pgio_completion_ops *compl_ops);
463extern void nfs_read_prepare(struct rpc_task *task, void *calldata);
464extern void nfs_pageio_reset_read_mds(struct nfs_pageio_descriptor *pgio);
465
466
467void nfs_umount_begin(struct super_block *);
468int nfs_statfs(struct dentry *, struct kstatfs *);
469int nfs_show_options(struct seq_file *, struct dentry *);
470int nfs_show_devname(struct seq_file *, struct dentry *);
471int nfs_show_path(struct seq_file *, struct dentry *);
472int nfs_show_stats(struct seq_file *, struct dentry *);
473int nfs_reconfigure(struct fs_context *);
474
475
476extern void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio,
477 struct inode *inode, int ioflags, bool force_mds,
478 const struct nfs_pgio_completion_ops *compl_ops);
479extern void nfs_pageio_reset_write_mds(struct nfs_pageio_descriptor *pgio);
480extern void nfs_commit_free(struct nfs_commit_data *p);
481extern void nfs_write_prepare(struct rpc_task *task, void *calldata);
482extern void nfs_commit_prepare(struct rpc_task *task, void *calldata);
483extern int nfs_initiate_commit(struct rpc_clnt *clnt,
484 struct nfs_commit_data *data,
485 const struct nfs_rpc_ops *nfs_ops,
486 const struct rpc_call_ops *call_ops,
487 int how, int flags);
488extern void nfs_init_commit(struct nfs_commit_data *data,
489 struct list_head *head,
490 struct pnfs_layout_segment *lseg,
491 struct nfs_commit_info *cinfo);
492int nfs_scan_commit_list(struct list_head *src, struct list_head *dst,
493 struct nfs_commit_info *cinfo, int max);
494unsigned long nfs_reqs_to_commit(struct nfs_commit_info *);
495int nfs_scan_commit(struct inode *inode, struct list_head *dst,
496 struct nfs_commit_info *cinfo);
497void nfs_mark_request_commit(struct nfs_page *req,
498 struct pnfs_layout_segment *lseg,
499 struct nfs_commit_info *cinfo,
500 u32 ds_commit_idx);
501int nfs_write_need_commit(struct nfs_pgio_header *);
502void nfs_writeback_update_inode(struct nfs_pgio_header *hdr);
503int nfs_generic_commit_list(struct inode *inode, struct list_head *head,
504 int how, struct nfs_commit_info *cinfo);
505void nfs_retry_commit(struct list_head *page_list,
506 struct pnfs_layout_segment *lseg,
507 struct nfs_commit_info *cinfo,
508 u32 ds_commit_idx);
509void nfs_commitdata_release(struct nfs_commit_data *data);
510void nfs_request_add_commit_list(struct nfs_page *req,
511 struct nfs_commit_info *cinfo);
512void nfs_request_add_commit_list_locked(struct nfs_page *req,
513 struct list_head *dst,
514 struct nfs_commit_info *cinfo);
515void nfs_request_remove_commit_list(struct nfs_page *req,
516 struct nfs_commit_info *cinfo);
517void nfs_init_cinfo(struct nfs_commit_info *cinfo,
518 struct inode *inode,
519 struct nfs_direct_req *dreq);
520int nfs_key_timeout_notify(struct file *filp, struct inode *inode);
521bool nfs_ctx_key_to_expire(struct nfs_open_context *ctx, struct inode *inode);
522void nfs_pageio_stop_mirroring(struct nfs_pageio_descriptor *pgio);
523
524int nfs_filemap_write_and_wait_range(struct address_space *mapping,
525 loff_t lstart, loff_t lend);
526
527#ifdef CONFIG_NFS_V4_1
528static inline void
529pnfs_bucket_clear_pnfs_ds_commit_verifiers(struct pnfs_commit_bucket *buckets,
530 unsigned int nbuckets)
531{
532 unsigned int i;
533
534 for (i = 0; i < nbuckets; i++)
535 buckets[i].direct_verf.committed = NFS_INVALID_STABLE_HOW;
536}
537static inline
538void nfs_clear_pnfs_ds_commit_verifiers(struct pnfs_ds_commit_info *cinfo)
539{
540 struct pnfs_commit_array *array;
541
542 rcu_read_lock();
543 list_for_each_entry_rcu(array, &cinfo->commits, cinfo_list)
544 pnfs_bucket_clear_pnfs_ds_commit_verifiers(array->buckets,
545 array->nbuckets);
546 rcu_read_unlock();
547}
548#else
549static inline
550void nfs_clear_pnfs_ds_commit_verifiers(struct pnfs_ds_commit_info *cinfo)
551{
552}
553#endif
554
555#ifdef CONFIG_MIGRATION
556extern int nfs_migrate_page(struct address_space *,
557 struct page *, struct page *, enum migrate_mode);
558#endif
559
560static inline int
561nfs_write_verifier_cmp(const struct nfs_write_verifier *v1,
562 const struct nfs_write_verifier *v2)
563{
564 return memcmp(v1->data, v2->data, sizeof(v1->data));
565}
566
567static inline bool
568nfs_write_match_verf(const struct nfs_writeverf *verf,
569 struct nfs_page *req)
570{
571 return verf->committed > NFS_UNSTABLE &&
572 !nfs_write_verifier_cmp(&req->wb_verf, &verf->verifier);
573}
574
575
576extern struct rpc_task *
577nfs_async_rename(struct inode *old_dir, struct inode *new_dir,
578 struct dentry *old_dentry, struct dentry *new_dentry,
579 void (*complete)(struct rpc_task *, struct nfs_renamedata *));
580extern int nfs_sillyrename(struct inode *dir, struct dentry *dentry);
581
582
583void nfs_init_cinfo_from_dreq(struct nfs_commit_info *cinfo,
584 struct nfs_direct_req *dreq);
585extern ssize_t nfs_dreq_bytes_left(struct nfs_direct_req *dreq);
586
587
588extern struct nfs_client *nfs4_init_client(struct nfs_client *clp,
589 const struct nfs_client_initdata *);
590extern int nfs40_walk_client_list(struct nfs_client *clp,
591 struct nfs_client **result,
592 const struct cred *cred);
593extern int nfs41_walk_client_list(struct nfs_client *clp,
594 struct nfs_client **result,
595 const struct cred *cred);
596extern void nfs4_test_session_trunk(struct rpc_clnt *clnt,
597 struct rpc_xprt *xprt,
598 void *data);
599
600static inline struct inode *nfs_igrab_and_active(struct inode *inode)
601{
602 struct super_block *sb = inode->i_sb;
603
604 if (sb && nfs_sb_active(sb)) {
605 if (igrab(inode))
606 return inode;
607 nfs_sb_deactive(sb);
608 }
609 return NULL;
610}
611
612static inline void nfs_iput_and_deactive(struct inode *inode)
613{
614 if (inode != NULL) {
615 struct super_block *sb = inode->i_sb;
616
617 iput(inode);
618 nfs_sb_deactive(sb);
619 }
620}
621
622
623
624
625static inline char *nfs_devname(struct dentry *dentry,
626 char *buffer, ssize_t buflen)
627{
628 char *dummy;
629 return nfs_path(&dummy, dentry, buffer, buflen, NFS_PATH_CANONICAL);
630}
631
632
633
634
635static inline
636unsigned long nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp)
637{
638
639 if ((bsize & (bsize - 1)) || nrbitsp) {
640 unsigned char nrbits;
641
642 for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--)
643 ;
644 bsize = 1 << nrbits;
645 if (nrbitsp)
646 *nrbitsp = nrbits;
647 }
648
649 return bsize;
650}
651
652
653
654
655static inline blkcnt_t nfs_calc_block_size(u64 tsize)
656{
657 blkcnt_t used = (tsize + 511) >> 9;
658 return (used > ULONG_MAX) ? ULONG_MAX : used;
659}
660
661
662
663
664static inline
665unsigned long nfs_block_size(unsigned long bsize, unsigned char *nrbitsp)
666{
667 if (bsize < NFS_MIN_FILE_IO_SIZE)
668 bsize = NFS_DEF_FILE_IO_SIZE;
669 else if (bsize >= NFS_MAX_FILE_IO_SIZE)
670 bsize = NFS_MAX_FILE_IO_SIZE;
671
672 return nfs_block_bits(bsize, nrbitsp);
673}
674
675
676
677
678static inline
679void nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize)
680{
681 sb->s_maxbytes = (loff_t)maxfilesize;
682 if (sb->s_maxbytes > MAX_LFS_FILESIZE || sb->s_maxbytes <= 0)
683 sb->s_maxbytes = MAX_LFS_FILESIZE;
684}
685
686
687
688
689
690static inline
691void nfs_mark_page_unstable(struct page *page, struct nfs_commit_info *cinfo)
692{
693 if (!cinfo->dreq) {
694 struct inode *inode = page_file_mapping(page)->host;
695
696
697
698
699 inc_node_page_state(page, NR_WRITEBACK);
700 inc_wb_stat(&inode_to_bdi(inode)->wb, WB_WRITEBACK);
701 __mark_inode_dirty(inode, I_DIRTY_DATASYNC);
702 }
703}
704
705
706
707
708static inline
709unsigned int nfs_page_length(struct page *page)
710{
711 loff_t i_size = i_size_read(page_file_mapping(page)->host);
712
713 if (i_size > 0) {
714 pgoff_t index = page_index(page);
715 pgoff_t end_index = (i_size - 1) >> PAGE_SHIFT;
716 if (index < end_index)
717 return PAGE_SIZE;
718 if (index == end_index)
719 return ((i_size - 1) & ~PAGE_MASK) + 1;
720 }
721 return 0;
722}
723
724
725
726
727static inline
728unsigned char nfs_umode_to_dtype(umode_t mode)
729{
730 return (mode >> 12) & 15;
731}
732
733
734
735
736
737static inline
738unsigned int nfs_page_array_len(unsigned int base, size_t len)
739{
740 return ((unsigned long)len + (unsigned long)base +
741 PAGE_SIZE - 1) >> PAGE_SHIFT;
742}
743
744
745
746
747
748
749
750
751static inline
752u64 nfs_timespec_to_change_attr(const struct timespec64 *ts)
753{
754 return ((u64)ts->tv_sec << 30) + ts->tv_nsec;
755}
756
757#ifdef CONFIG_CRC32
758
759
760
761
762
763
764
765static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh)
766{
767 return ~crc32_le(0xFFFFFFFF, &fh->data[0], fh->size);
768}
769static inline u32 nfs_stateid_hash(const nfs4_stateid *stateid)
770{
771 return ~crc32_le(0xFFFFFFFF, &stateid->other[0],
772 NFS4_STATEID_OTHER_SIZE);
773}
774#else
775static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh)
776{
777 return 0;
778}
779static inline u32 nfs_stateid_hash(nfs4_stateid *stateid)
780{
781 return 0;
782}
783#endif
784
785static inline bool nfs_error_is_fatal(int err)
786{
787 switch (err) {
788 case -ERESTARTSYS:
789 case -EINTR:
790 case -EACCES:
791 case -EDQUOT:
792 case -EFBIG:
793 case -EIO:
794 case -ENOSPC:
795 case -EROFS:
796 case -ESTALE:
797 case -E2BIG:
798 case -ENOMEM:
799 case -ETIMEDOUT:
800 return true;
801 default:
802 return false;
803 }
804}
805
806static inline bool nfs_error_is_fatal_on_server(int err)
807{
808 switch (err) {
809 case 0:
810 case -ERESTARTSYS:
811 case -EINTR:
812 return false;
813 }
814 return nfs_error_is_fatal(err);
815}
816
817
818
819
820
821static inline void nfs_set_port(struct sockaddr *sap, int *port,
822 const unsigned short default_port)
823{
824 if (*port == NFS_UNSPEC_PORT)
825 *port = default_port;
826
827 rpc_set_port(sap, *port);
828}
829
