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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 unsigned int max_connect;
71 struct net *net;
72 const struct rpc_timeout *timeparms;
73 const struct cred *cred;
74};
75
76
77
78
79struct nfs_fs_context {
80 bool internal;
81 bool skip_reconfig_option_check;
82 bool need_mount;
83 bool sloppy;
84 unsigned int flags;
85 unsigned int rsize, wsize;
86 unsigned int timeo, retrans;
87 unsigned int acregmin, acregmax;
88 unsigned int acdirmin, acdirmax;
89 unsigned int namlen;
90 unsigned int options;
91 unsigned int bsize;
92 struct nfs_auth_info auth_info;
93 rpc_authflavor_t selected_flavor;
94 char *client_address;
95 unsigned int version;
96 unsigned int minorversion;
97 char *fscache_uniq;
98 unsigned short protofamily;
99 unsigned short mountfamily;
100 bool has_sec_mnt_opts;
101
102 struct {
103 union {
104 struct sockaddr address;
105 struct sockaddr_storage _address;
106 };
107 size_t addrlen;
108 char *hostname;
109 u32 version;
110 int port;
111 unsigned short protocol;
112 } mount_server;
113
114 struct {
115 union {
116 struct sockaddr address;
117 struct sockaddr_storage _address;
118 };
119 size_t addrlen;
120 char *hostname;
121 char *export_path;
122 int port;
123 unsigned short protocol;
124 unsigned short nconnect;
125 unsigned short max_connect;
126 unsigned short export_path_len;
127 } nfs_server;
128
129 struct nfs_fh *mntfh;
130 struct nfs_server *server;
131 struct nfs_subversion *nfs_mod;
132
133
134 struct nfs_clone_mount {
135 struct super_block *sb;
136 struct dentry *dentry;
137 struct nfs_fattr *fattr;
138 unsigned int inherited_bsize;
139 } clone_data;
140};
141
142#define nfs_errorf(fc, fmt, ...) ((fc)->log.log ? \
143 errorf(fc, fmt, ## __VA_ARGS__) : \
144 ({ dprintk(fmt "\n", ## __VA_ARGS__); }))
145
146#define nfs_ferrorf(fc, fac, fmt, ...) ((fc)->log.log ? \
147 errorf(fc, fmt, ## __VA_ARGS__) : \
148 ({ dfprintk(fac, fmt "\n", ## __VA_ARGS__); }))
149
150#define nfs_invalf(fc, fmt, ...) ((fc)->log.log ? \
151 invalf(fc, fmt, ## __VA_ARGS__) : \
152 ({ dprintk(fmt "\n", ## __VA_ARGS__); -EINVAL; }))
153
154#define nfs_finvalf(fc, fac, fmt, ...) ((fc)->log.log ? \
155 invalf(fc, fmt, ## __VA_ARGS__) : \
156 ({ dfprintk(fac, fmt "\n", ## __VA_ARGS__); -EINVAL; }))
157
158#define nfs_warnf(fc, fmt, ...) ((fc)->log.log ? \
159 warnf(fc, fmt, ## __VA_ARGS__) : \
160 ({ dprintk(fmt "\n", ## __VA_ARGS__); }))
161
162#define nfs_fwarnf(fc, fac, fmt, ...) ((fc)->log.log ? \
163 warnf(fc, fmt, ## __VA_ARGS__) : \
164 ({ dfprintk(fac, fmt "\n", ## __VA_ARGS__); }))
165
166static inline struct nfs_fs_context *nfs_fc2context(const struct fs_context *fc)
167{
168 return fc->fs_private;
169}
170
171
172struct nfs_mount_request {
173 struct sockaddr *sap;
174 size_t salen;
175 char *hostname;
176 char *dirpath;
177 u32 version;
178 unsigned short protocol;
179 struct nfs_fh *fh;
180 int noresvport;
181 unsigned int *auth_flav_len;
182 rpc_authflavor_t *auth_flavs;
183 struct net *net;
184};
185
186extern int nfs_mount(struct nfs_mount_request *info, int timeo, int retrans);
187extern void nfs_umount(const struct nfs_mount_request *info);
188
189
190extern const struct rpc_program nfs_program;
191extern void nfs_clients_init(struct net *net);
192extern void nfs_clients_exit(struct net *net);
193extern struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *);
194int nfs_create_rpc_client(struct nfs_client *, const struct nfs_client_initdata *, rpc_authflavor_t);
195struct nfs_client *nfs_get_client(const struct nfs_client_initdata *);
196int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *, struct nfs_fattr *);
197void nfs_server_insert_lists(struct nfs_server *);
198void nfs_server_remove_lists(struct nfs_server *);
199void nfs_init_timeout_values(struct rpc_timeout *to, int proto, int timeo, int retrans);
200int nfs_init_server_rpcclient(struct nfs_server *, const struct rpc_timeout *t,
201 rpc_authflavor_t);
202struct nfs_server *nfs_alloc_server(void);
203void nfs_server_copy_userdata(struct nfs_server *, struct nfs_server *);
204
205extern void nfs_put_client(struct nfs_client *);
206extern void nfs_free_client(struct nfs_client *);
207extern struct nfs_client *nfs4_find_client_ident(struct net *, int);
208extern struct nfs_client *
209nfs4_find_client_sessionid(struct net *, const struct sockaddr *,
210 struct nfs4_sessionid *, u32);
211extern struct nfs_server *nfs_create_server(struct fs_context *);
212extern struct nfs_server *nfs4_create_server(struct fs_context *);
213extern struct nfs_server *nfs4_create_referral_server(struct fs_context *);
214extern int nfs4_update_server(struct nfs_server *server, const char *hostname,
215 struct sockaddr *sap, size_t salen,
216 struct net *net);
217extern void nfs_free_server(struct nfs_server *server);
218extern struct nfs_server *nfs_clone_server(struct nfs_server *,
219 struct nfs_fh *,
220 struct nfs_fattr *,
221 rpc_authflavor_t);
222extern bool nfs_client_init_is_complete(const struct nfs_client *clp);
223extern int nfs_client_init_status(const struct nfs_client *clp);
224extern int nfs_wait_client_init_complete(const struct nfs_client *clp);
225extern void nfs_mark_client_ready(struct nfs_client *clp, int state);
226extern struct nfs_client *nfs4_set_ds_client(struct nfs_server *mds_srv,
227 const struct sockaddr *ds_addr,
228 int ds_addrlen, int ds_proto,
229 unsigned int ds_timeo,
230 unsigned int ds_retrans,
231 u32 minor_version);
232extern struct rpc_clnt *nfs4_find_or_create_ds_client(struct nfs_client *,
233 struct inode *);
234extern struct nfs_client *nfs3_set_ds_client(struct nfs_server *mds_srv,
235 const struct sockaddr *ds_addr, int ds_addrlen,
236 int ds_proto, unsigned int ds_timeo,
237 unsigned int ds_retrans);
238#ifdef CONFIG_PROC_FS
239extern int __init nfs_fs_proc_init(void);
240extern void nfs_fs_proc_exit(void);
241extern int nfs_fs_proc_net_init(struct net *net);
242extern void nfs_fs_proc_net_exit(struct net *net);
243#else
244static inline int nfs_fs_proc_net_init(struct net *net)
245{
246 return 0;
247}
248static inline void nfs_fs_proc_net_exit(struct net *net)
249{
250}
251static inline int nfs_fs_proc_init(void)
252{
253 return 0;
254}
255static inline void nfs_fs_proc_exit(void)
256{
257}
258#endif
259
260
261extern const struct svc_version nfs4_callback_version1;
262extern const struct svc_version nfs4_callback_version4;
263
264
265extern struct file_system_type nfs_fs_type;
266
267
268extern int __init nfs_init_nfspagecache(void);
269extern void nfs_destroy_nfspagecache(void);
270extern int __init nfs_init_readpagecache(void);
271extern void nfs_destroy_readpagecache(void);
272extern int __init nfs_init_writepagecache(void);
273extern void nfs_destroy_writepagecache(void);
274
275extern int __init nfs_init_directcache(void);
276extern void nfs_destroy_directcache(void);
277extern void nfs_pgheader_init(struct nfs_pageio_descriptor *desc,
278 struct nfs_pgio_header *hdr,
279 void (*release)(struct nfs_pgio_header *hdr));
280void nfs_set_pgio_error(struct nfs_pgio_header *hdr, int error, loff_t pos);
281int nfs_iocounter_wait(struct nfs_lock_context *l_ctx);
282
283extern const struct nfs_pageio_ops nfs_pgio_rw_ops;
284struct nfs_pgio_header *nfs_pgio_header_alloc(const struct nfs_rw_ops *);
285void nfs_pgio_header_free(struct nfs_pgio_header *);
286int nfs_generic_pgio(struct nfs_pageio_descriptor *, struct nfs_pgio_header *);
287int nfs_initiate_pgio(struct rpc_clnt *clnt, struct nfs_pgio_header *hdr,
288 const struct cred *cred, const struct nfs_rpc_ops *rpc_ops,
289 const struct rpc_call_ops *call_ops, int how, int flags);
290void nfs_free_request(struct nfs_page *req);
291struct nfs_pgio_mirror *
292nfs_pgio_current_mirror(struct nfs_pageio_descriptor *desc);
293
294static inline bool nfs_match_open_context(const struct nfs_open_context *ctx1,
295 const struct nfs_open_context *ctx2)
296{
297 return cred_fscmp(ctx1->cred, ctx2->cred) == 0 && ctx1->state == ctx2->state;
298}
299
300
301extern const struct rpc_procinfo nfs_procedures[];
302extern int nfs2_decode_dirent(struct xdr_stream *,
303 struct nfs_entry *, bool);
304
305
306extern const struct rpc_procinfo nfs3_procedures[];
307extern int nfs3_decode_dirent(struct xdr_stream *,
308 struct nfs_entry *, bool);
309
310
311#if IS_ENABLED(CONFIG_NFS_V4)
312extern int nfs4_decode_dirent(struct xdr_stream *,
313 struct nfs_entry *, bool);
314#endif
315#ifdef CONFIG_NFS_V4_1
316extern const u32 nfs41_maxread_overhead;
317extern const u32 nfs41_maxwrite_overhead;
318extern const u32 nfs41_maxgetdevinfo_overhead;
319#endif
320
321
322#if IS_ENABLED(CONFIG_NFS_V4)
323extern const struct rpc_procinfo nfs4_procedures[];
324#endif
325
326#ifdef CONFIG_NFS_V4_SECURITY_LABEL
327extern struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags);
328static inline struct nfs4_label *
329nfs4_label_copy(struct nfs4_label *dst, struct nfs4_label *src)
330{
331 if (!dst || !src)
332 return NULL;
333
334 if (src->len > NFS4_MAXLABELLEN)
335 return NULL;
336
337 dst->lfs = src->lfs;
338 dst->pi = src->pi;
339 dst->len = src->len;
340 memcpy(dst->label, src->label, src->len);
341
342 return dst;
343}
344static inline void nfs4_label_free(struct nfs4_label *label)
345{
346 if (label) {
347 kfree(label->label);
348 kfree(label);
349 }
350 return;
351}
352
353static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi)
354{
355 if (nfs_server_capable(&nfsi->vfs_inode, NFS_CAP_SECURITY_LABEL))
356 nfsi->cache_validity |= NFS_INO_INVALID_LABEL;
357}
358#else
359static inline struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags) { return NULL; }
360static inline void nfs4_label_free(void *label) {}
361static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi)
362{
363}
364static inline struct nfs4_label *
365nfs4_label_copy(struct nfs4_label *dst, struct nfs4_label *src)
366{
367 return NULL;
368}
369#endif
370
371
372void nfs_close_context(struct nfs_open_context *ctx, int is_sync);
373extern struct nfs_client *nfs_init_client(struct nfs_client *clp,
374 const struct nfs_client_initdata *);
375
376
377extern void nfs_advise_use_readdirplus(struct inode *dir);
378extern void nfs_force_use_readdirplus(struct inode *dir);
379extern unsigned long nfs_access_cache_count(struct shrinker *shrink,
380 struct shrink_control *sc);
381extern unsigned long nfs_access_cache_scan(struct shrinker *shrink,
382 struct shrink_control *sc);
383struct dentry *nfs_lookup(struct inode *, struct dentry *, unsigned int);
384int nfs_create(struct user_namespace *, struct inode *, struct dentry *,
385 umode_t, bool);
386int nfs_mkdir(struct user_namespace *, struct inode *, struct dentry *,
387 umode_t);
388int nfs_rmdir(struct inode *, struct dentry *);
389int nfs_unlink(struct inode *, struct dentry *);
390int nfs_symlink(struct user_namespace *, struct inode *, struct dentry *,
391 const char *);
392int nfs_link(struct dentry *, struct inode *, struct dentry *);
393int nfs_mknod(struct user_namespace *, struct inode *, struct dentry *, umode_t,
394 dev_t);
395int nfs_rename(struct user_namespace *, struct inode *, struct dentry *,
396 struct inode *, struct dentry *, unsigned int);
397
398
399int nfs_file_fsync(struct file *file, loff_t start, loff_t end, int datasync);
400loff_t nfs_file_llseek(struct file *, loff_t, int);
401ssize_t nfs_file_read(struct kiocb *, struct iov_iter *);
402int nfs_file_mmap(struct file *, struct vm_area_struct *);
403ssize_t nfs_file_write(struct kiocb *, struct iov_iter *);
404int nfs_file_release(struct inode *, struct file *);
405int nfs_lock(struct file *, int, struct file_lock *);
406int nfs_flock(struct file *, int, struct file_lock *);
407int nfs_check_flags(int);
408
409
410extern struct workqueue_struct *nfsiod_workqueue;
411extern struct inode *nfs_alloc_inode(struct super_block *sb);
412extern void nfs_free_inode(struct inode *);
413extern int nfs_write_inode(struct inode *, struct writeback_control *);
414extern int nfs_drop_inode(struct inode *);
415extern void nfs_clear_inode(struct inode *);
416extern void nfs_evict_inode(struct inode *);
417extern void nfs_zap_acl_cache(struct inode *inode);
418extern void nfs_set_cache_invalid(struct inode *inode, unsigned long flags);
419extern bool nfs_check_cache_invalid(struct inode *, unsigned long);
420extern int nfs_wait_bit_killable(struct wait_bit_key *key, int mode);
421extern int nfs_wait_atomic_killable(atomic_t *p, unsigned int mode);
422
423
424extern const struct super_operations nfs_sops;
425bool nfs_auth_info_match(const struct nfs_auth_info *, rpc_authflavor_t);
426int nfs_try_get_tree(struct fs_context *);
427int nfs_get_tree_common(struct fs_context *);
428void nfs_kill_super(struct super_block *);
429
430extern struct rpc_stat nfs_rpcstat;
431
432extern int __init register_nfs_fs(void);
433extern void __exit unregister_nfs_fs(void);
434extern bool nfs_sb_active(struct super_block *sb);
435extern void nfs_sb_deactive(struct super_block *sb);
436extern int nfs_client_for_each_server(struct nfs_client *clp,
437 int (*fn)(struct nfs_server *, void *),
438 void *data);
439
440extern void nfs_start_io_read(struct inode *inode);
441extern void nfs_end_io_read(struct inode *inode);
442extern void nfs_start_io_write(struct inode *inode);
443extern void nfs_end_io_write(struct inode *inode);
444extern void nfs_start_io_direct(struct inode *inode);
445extern void nfs_end_io_direct(struct inode *inode);
446
447static inline bool nfs_file_io_is_buffered(struct nfs_inode *nfsi)
448{
449 return test_bit(NFS_INO_ODIRECT, &nfsi->flags) == 0;
450}
451
452
453#define NFS_PATH_CANONICAL 1
454extern char *nfs_path(char **p, struct dentry *dentry,
455 char *buffer, ssize_t buflen, unsigned flags);
456extern struct vfsmount *nfs_d_automount(struct path *path);
457int nfs_submount(struct fs_context *, struct nfs_server *);
458int nfs_do_submount(struct fs_context *);
459
460
461extern int nfs_get_root(struct super_block *s, struct fs_context *fc);
462#if IS_ENABLED(CONFIG_NFS_V4)
463extern int nfs4_get_rootfh(struct nfs_server *server, struct nfs_fh *mntfh, bool);
464#endif
465
466struct nfs_pgio_completion_ops;
467
468extern void nfs_pageio_init_read(struct nfs_pageio_descriptor *pgio,
469 struct inode *inode, bool force_mds,
470 const struct nfs_pgio_completion_ops *compl_ops);
471extern void nfs_read_prepare(struct rpc_task *task, void *calldata);
472extern void nfs_pageio_reset_read_mds(struct nfs_pageio_descriptor *pgio);
473
474
475void nfs_umount_begin(struct super_block *);
476int nfs_statfs(struct dentry *, struct kstatfs *);
477int nfs_show_options(struct seq_file *, struct dentry *);
478int nfs_show_devname(struct seq_file *, struct dentry *);
479int nfs_show_path(struct seq_file *, struct dentry *);
480int nfs_show_stats(struct seq_file *, struct dentry *);
481int nfs_reconfigure(struct fs_context *);
482
483
484extern void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio,
485 struct inode *inode, int ioflags, bool force_mds,
486 const struct nfs_pgio_completion_ops *compl_ops);
487extern void nfs_pageio_reset_write_mds(struct nfs_pageio_descriptor *pgio);
488extern void nfs_commit_free(struct nfs_commit_data *p);
489extern void nfs_write_prepare(struct rpc_task *task, void *calldata);
490extern void nfs_commit_prepare(struct rpc_task *task, void *calldata);
491extern int nfs_initiate_commit(struct rpc_clnt *clnt,
492 struct nfs_commit_data *data,
493 const struct nfs_rpc_ops *nfs_ops,
494 const struct rpc_call_ops *call_ops,
495 int how, int flags);
496extern void nfs_init_commit(struct nfs_commit_data *data,
497 struct list_head *head,
498 struct pnfs_layout_segment *lseg,
499 struct nfs_commit_info *cinfo);
500int nfs_scan_commit_list(struct list_head *src, struct list_head *dst,
501 struct nfs_commit_info *cinfo, int max);
502unsigned long nfs_reqs_to_commit(struct nfs_commit_info *);
503int nfs_scan_commit(struct inode *inode, struct list_head *dst,
504 struct nfs_commit_info *cinfo);
505void nfs_mark_request_commit(struct nfs_page *req,
506 struct pnfs_layout_segment *lseg,
507 struct nfs_commit_info *cinfo,
508 u32 ds_commit_idx);
509int nfs_write_need_commit(struct nfs_pgio_header *);
510void nfs_writeback_update_inode(struct nfs_pgio_header *hdr);
511int nfs_generic_commit_list(struct inode *inode, struct list_head *head,
512 int how, struct nfs_commit_info *cinfo);
513void nfs_retry_commit(struct list_head *page_list,
514 struct pnfs_layout_segment *lseg,
515 struct nfs_commit_info *cinfo,
516 u32 ds_commit_idx);
517void nfs_commitdata_release(struct nfs_commit_data *data);
518void nfs_request_add_commit_list(struct nfs_page *req,
519 struct nfs_commit_info *cinfo);
520void nfs_request_add_commit_list_locked(struct nfs_page *req,
521 struct list_head *dst,
522 struct nfs_commit_info *cinfo);
523void nfs_request_remove_commit_list(struct nfs_page *req,
524 struct nfs_commit_info *cinfo);
525void nfs_init_cinfo(struct nfs_commit_info *cinfo,
526 struct inode *inode,
527 struct nfs_direct_req *dreq);
528int nfs_key_timeout_notify(struct file *filp, struct inode *inode);
529bool nfs_ctx_key_to_expire(struct nfs_open_context *ctx, struct inode *inode);
530void nfs_pageio_stop_mirroring(struct nfs_pageio_descriptor *pgio);
531
532int nfs_filemap_write_and_wait_range(struct address_space *mapping,
533 loff_t lstart, loff_t lend);
534
535#ifdef CONFIG_NFS_V4_1
536static inline void
537pnfs_bucket_clear_pnfs_ds_commit_verifiers(struct pnfs_commit_bucket *buckets,
538 unsigned int nbuckets)
539{
540 unsigned int i;
541
542 for (i = 0; i < nbuckets; i++)
543 buckets[i].direct_verf.committed = NFS_INVALID_STABLE_HOW;
544}
545static inline
546void nfs_clear_pnfs_ds_commit_verifiers(struct pnfs_ds_commit_info *cinfo)
547{
548 struct pnfs_commit_array *array;
549
550 rcu_read_lock();
551 list_for_each_entry_rcu(array, &cinfo->commits, cinfo_list)
552 pnfs_bucket_clear_pnfs_ds_commit_verifiers(array->buckets,
553 array->nbuckets);
554 rcu_read_unlock();
555}
556#else
557static inline
558void nfs_clear_pnfs_ds_commit_verifiers(struct pnfs_ds_commit_info *cinfo)
559{
560}
561#endif
562
563#ifdef CONFIG_MIGRATION
564extern int nfs_migrate_page(struct address_space *,
565 struct page *, struct page *, enum migrate_mode);
566#endif
567
568static inline int
569nfs_write_verifier_cmp(const struct nfs_write_verifier *v1,
570 const struct nfs_write_verifier *v2)
571{
572 return memcmp(v1->data, v2->data, sizeof(v1->data));
573}
574
575static inline bool
576nfs_write_match_verf(const struct nfs_writeverf *verf,
577 struct nfs_page *req)
578{
579 return verf->committed > NFS_UNSTABLE &&
580 !nfs_write_verifier_cmp(&req->wb_verf, &verf->verifier);
581}
582
583
584extern struct rpc_task *
585nfs_async_rename(struct inode *old_dir, struct inode *new_dir,
586 struct dentry *old_dentry, struct dentry *new_dentry,
587 void (*complete)(struct rpc_task *, struct nfs_renamedata *));
588extern int nfs_sillyrename(struct inode *dir, struct dentry *dentry);
589
590
591void nfs_init_cinfo_from_dreq(struct nfs_commit_info *cinfo,
592 struct nfs_direct_req *dreq);
593extern ssize_t nfs_dreq_bytes_left(struct nfs_direct_req *dreq);
594
595
596extern struct nfs_client *nfs4_init_client(struct nfs_client *clp,
597 const struct nfs_client_initdata *);
598extern int nfs40_walk_client_list(struct nfs_client *clp,
599 struct nfs_client **result,
600 const struct cred *cred);
601extern int nfs41_walk_client_list(struct nfs_client *clp,
602 struct nfs_client **result,
603 const struct cred *cred);
604extern void nfs4_test_session_trunk(struct rpc_clnt *clnt,
605 struct rpc_xprt *xprt,
606 void *data);
607
608static inline struct inode *nfs_igrab_and_active(struct inode *inode)
609{
610 struct super_block *sb = inode->i_sb;
611
612 if (sb && nfs_sb_active(sb)) {
613 if (igrab(inode))
614 return inode;
615 nfs_sb_deactive(sb);
616 }
617 return NULL;
618}
619
620static inline void nfs_iput_and_deactive(struct inode *inode)
621{
622 if (inode != NULL) {
623 struct super_block *sb = inode->i_sb;
624
625 iput(inode);
626 nfs_sb_deactive(sb);
627 }
628}
629
630
631
632
633static inline char *nfs_devname(struct dentry *dentry,
634 char *buffer, ssize_t buflen)
635{
636 char *dummy;
637 return nfs_path(&dummy, dentry, buffer, buflen, NFS_PATH_CANONICAL);
638}
639
640
641
642
643static inline
644unsigned long nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp)
645{
646
647 if ((bsize & (bsize - 1)) || nrbitsp) {
648 unsigned char nrbits;
649
650 for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--)
651 ;
652 bsize = 1 << nrbits;
653 if (nrbitsp)
654 *nrbitsp = nrbits;
655 }
656
657 return bsize;
658}
659
660
661
662
663static inline blkcnt_t nfs_calc_block_size(u64 tsize)
664{
665 blkcnt_t used = (tsize + 511) >> 9;
666 return (used > ULONG_MAX) ? ULONG_MAX : used;
667}
668
669
670
671
672static inline
673unsigned long nfs_block_size(unsigned long bsize, unsigned char *nrbitsp)
674{
675 if (bsize < NFS_MIN_FILE_IO_SIZE)
676 bsize = NFS_DEF_FILE_IO_SIZE;
677 else if (bsize >= NFS_MAX_FILE_IO_SIZE)
678 bsize = NFS_MAX_FILE_IO_SIZE;
679
680 return nfs_block_bits(bsize, nrbitsp);
681}
682
683
684
685
686static inline
687void nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize)
688{
689 sb->s_maxbytes = (loff_t)maxfilesize;
690 if (sb->s_maxbytes > MAX_LFS_FILESIZE || sb->s_maxbytes <= 0)
691 sb->s_maxbytes = MAX_LFS_FILESIZE;
692}
693
694
695
696
697
698static inline
699void nfs_mark_page_unstable(struct page *page, struct nfs_commit_info *cinfo)
700{
701 if (!cinfo->dreq) {
702 struct inode *inode = page_file_mapping(page)->host;
703
704
705
706
707 inc_node_page_state(page, NR_WRITEBACK);
708 inc_wb_stat(&inode_to_bdi(inode)->wb, WB_WRITEBACK);
709 __mark_inode_dirty(inode, I_DIRTY_DATASYNC);
710 }
711}
712
713
714
715
716static inline
717unsigned int nfs_page_length(struct page *page)
718{
719 loff_t i_size = i_size_read(page_file_mapping(page)->host);
720
721 if (i_size > 0) {
722 pgoff_t index = page_index(page);
723 pgoff_t end_index = (i_size - 1) >> PAGE_SHIFT;
724 if (index < end_index)
725 return PAGE_SIZE;
726 if (index == end_index)
727 return ((i_size - 1) & ~PAGE_MASK) + 1;
728 }
729 return 0;
730}
731
732
733
734
735static inline
736unsigned char nfs_umode_to_dtype(umode_t mode)
737{
738 return (mode >> 12) & 15;
739}
740
741
742
743
744
745static inline
746unsigned int nfs_page_array_len(unsigned int base, size_t len)
747{
748 return ((unsigned long)len + (unsigned long)base +
749 PAGE_SIZE - 1) >> PAGE_SHIFT;
750}
751
752
753
754
755
756
757
758
759static inline
760u64 nfs_timespec_to_change_attr(const struct timespec64 *ts)
761{
762 return ((u64)ts->tv_sec << 30) + ts->tv_nsec;
763}
764
765#ifdef CONFIG_CRC32
766
767
768
769
770
771
772
773static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh)
774{
775 return ~crc32_le(0xFFFFFFFF, &fh->data[0], fh->size);
776}
777static inline u32 nfs_stateid_hash(const nfs4_stateid *stateid)
778{
779 return ~crc32_le(0xFFFFFFFF, &stateid->other[0],
780 NFS4_STATEID_OTHER_SIZE);
781}
782#else
783static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh)
784{
785 return 0;
786}
787static inline u32 nfs_stateid_hash(nfs4_stateid *stateid)
788{
789 return 0;
790}
791#endif
792
793static inline bool nfs_error_is_fatal(int err)
794{
795 switch (err) {
796 case -ERESTARTSYS:
797 case -EINTR:
798 case -EACCES:
799 case -EDQUOT:
800 case -EFBIG:
801 case -EIO:
802 case -ENOSPC:
803 case -EROFS:
804 case -ESTALE:
805 case -E2BIG:
806 case -ENOMEM:
807 case -ETIMEDOUT:
808 return true;
809 default:
810 return false;
811 }
812}
813
814static inline bool nfs_error_is_fatal_on_server(int err)
815{
816 switch (err) {
817 case 0:
818 case -ERESTARTSYS:
819 case -EINTR:
820 return false;
821 }
822 return nfs_error_is_fatal(err);
823}
824
825
826
827
828
829static inline void nfs_set_port(struct sockaddr *sap, int *port,
830 const unsigned short default_port)
831{
832 if (*port == NFS_UNSPEC_PORT)
833 *port = default_port;
834
835 rpc_set_port(sap, *port);
836}
837
