1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * NFS internal definitions
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
16 extern const struct export_operations nfs_export_ops;
17
18 struct nfs_string;
19 struct nfs_pageio_descriptor;
20
nfs_attr_check_mountpoint(struct super_block * parent,struct nfs_fattr * fattr)21 static 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
nfs_attr_use_mounted_on_fileid(struct nfs_fattr * fattr)27 static 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
nfs_lookup_is_soft_revalidate(const struct dentry * dentry)36 static 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 * Note: RFC 1813 doesn't limit the number of auth flavors that
47 * a server can return, so make something up.
48 */
49 #define NFS_MAX_SECFLAVORS (12)
50
51 /*
52 * Value used if the user did not specify a port value.
53 */
54 #define NFS_UNSPEC_PORT (-1)
55
56 #define NFS_UNSPEC_RETRANS (UINT_MAX)
57 #define NFS_UNSPEC_TIMEO (UINT_MAX)
58
59 /*
60 * Maximum number of pages that readdir can use for creating
61 * a vmapped array of pages.
62 */
63 #define NFS_MAX_READDIR_PAGES 8
64
65 struct nfs_client_initdata {
66 unsigned long init_flags;
67 const char *hostname; /* Hostname of the server */
68 const struct sockaddr *addr; /* Address of the server */
69 const char *nodename; /* Hostname of the client */
70 const char *ip_addr; /* IP address of the client */
71 size_t addrlen;
72 struct nfs_subversion *nfs_mod;
73 int proto;
74 u32 minorversion;
75 unsigned int nconnect;
76 struct net *net;
77 const struct rpc_timeout *timeparms;
78 const struct cred *cred;
79 };
80
81 /*
82 * In-kernel mount arguments
83 */
84 struct nfs_fs_context {
85 bool internal;
86 bool skip_reconfig_option_check;
87 bool need_mount;
88 bool sloppy;
89 unsigned int flags; /* NFS{,4}_MOUNT_* flags */
90 unsigned int rsize, wsize;
91 unsigned int timeo, retrans;
92 unsigned int acregmin, acregmax;
93 unsigned int acdirmin, acdirmax;
94 unsigned int namlen;
95 unsigned int options;
96 unsigned int bsize;
97 struct nfs_auth_info auth_info;
98 rpc_authflavor_t selected_flavor;
99 char *client_address;
100 unsigned int version;
101 unsigned int minorversion;
102 char *fscache_uniq;
103 unsigned short protofamily;
104 unsigned short mountfamily;
105
106 struct {
107 union {
108 struct sockaddr address;
109 struct sockaddr_storage _address;
110 };
111 size_t addrlen;
112 char *hostname;
113 u32 version;
114 int port;
115 unsigned short protocol;
116 } mount_server;
117
118 struct {
119 union {
120 struct sockaddr address;
121 struct sockaddr_storage _address;
122 };
123 size_t addrlen;
124 char *hostname;
125 char *export_path;
126 int port;
127 unsigned short protocol;
128 unsigned short nconnect;
129 unsigned short export_path_len;
130 } nfs_server;
131
132 struct nfs_fh *mntfh;
133 struct nfs_server *server;
134 struct nfs_subversion *nfs_mod;
135
136 /* Information for a cloned mount. */
137 struct nfs_clone_mount {
138 struct super_block *sb;
139 struct dentry *dentry;
140 struct nfs_fattr *fattr;
141 unsigned int inherited_bsize;
142 } clone_data;
143 };
144
145 #define nfs_errorf(fc, fmt, ...) errorf(fc, fmt, ## __VA_ARGS__)
146 #define nfs_invalf(fc, fmt, ...) invalf(fc, fmt, ## __VA_ARGS__)
147 #define nfs_warnf(fc, fmt, ...) warnf(fc, fmt, ## __VA_ARGS__)
148
nfs_fc2context(const struct fs_context * fc)149 static inline struct nfs_fs_context *nfs_fc2context(const struct fs_context *fc)
150 {
151 return fc->fs_private;
152 }
153
154 /* mount_clnt.c */
155 struct nfs_mount_request {
156 struct sockaddr *sap;
157 size_t salen;
158 char *hostname;
159 char *dirpath;
160 u32 version;
161 unsigned short protocol;
162 struct nfs_fh *fh;
163 int noresvport;
164 unsigned int *auth_flav_len;
165 rpc_authflavor_t *auth_flavs;
166 struct net *net;
167 };
168
169 extern int nfs_mount(struct nfs_mount_request *info);
170 extern void nfs_umount(const struct nfs_mount_request *info);
171
172 /* client.c */
173 extern const struct rpc_program nfs_program;
174 extern void nfs_clients_init(struct net *net);
175 extern void nfs_clients_exit(struct net *net);
176 extern struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *);
177 int nfs_create_rpc_client(struct nfs_client *, const struct nfs_client_initdata *, rpc_authflavor_t);
178 struct nfs_client *nfs_get_client(const struct nfs_client_initdata *);
179 int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *, struct nfs_fattr *);
180 void nfs_server_insert_lists(struct nfs_server *);
181 void nfs_server_remove_lists(struct nfs_server *);
182 void nfs_init_timeout_values(struct rpc_timeout *to, int proto, int timeo, int retrans);
183 int nfs_init_server_rpcclient(struct nfs_server *, const struct rpc_timeout *t,
184 rpc_authflavor_t);
185 struct nfs_server *nfs_alloc_server(void);
186 void nfs_server_copy_userdata(struct nfs_server *, struct nfs_server *);
187
188 extern void nfs_put_client(struct nfs_client *);
189 extern void nfs_free_client(struct nfs_client *);
190 extern struct nfs_client *nfs4_find_client_ident(struct net *, int);
191 extern struct nfs_client *
192 nfs4_find_client_sessionid(struct net *, const struct sockaddr *,
193 struct nfs4_sessionid *, u32);
194 extern struct nfs_server *nfs_create_server(struct fs_context *);
195 extern struct nfs_server *nfs4_create_server(struct fs_context *);
196 extern struct nfs_server *nfs4_create_referral_server(struct fs_context *);
197 extern int nfs4_update_server(struct nfs_server *server, const char *hostname,
198 struct sockaddr *sap, size_t salen,
199 struct net *net);
200 extern void nfs_free_server(struct nfs_server *server);
201 extern struct nfs_server *nfs_clone_server(struct nfs_server *,
202 struct nfs_fh *,
203 struct nfs_fattr *,
204 rpc_authflavor_t);
205 extern bool nfs_client_init_is_complete(const struct nfs_client *clp);
206 extern int nfs_client_init_status(const struct nfs_client *clp);
207 extern int nfs_wait_client_init_complete(const struct nfs_client *clp);
208 extern void nfs_mark_client_ready(struct nfs_client *clp, int state);
209 extern struct nfs_client *nfs4_set_ds_client(struct nfs_server *mds_srv,
210 const struct sockaddr *ds_addr,
211 int ds_addrlen, int ds_proto,
212 unsigned int ds_timeo,
213 unsigned int ds_retrans,
214 u32 minor_version);
215 extern struct rpc_clnt *nfs4_find_or_create_ds_client(struct nfs_client *,
216 struct inode *);
217 extern struct nfs_client *nfs3_set_ds_client(struct nfs_server *mds_srv,
218 const struct sockaddr *ds_addr, int ds_addrlen,
219 int ds_proto, unsigned int ds_timeo,
220 unsigned int ds_retrans);
221 #ifdef CONFIG_PROC_FS
222 extern int __init nfs_fs_proc_init(void);
223 extern void nfs_fs_proc_exit(void);
224 extern int nfs_fs_proc_net_init(struct net *net);
225 extern void nfs_fs_proc_net_exit(struct net *net);
226 #else
nfs_fs_proc_net_init(struct net * net)227 static inline int nfs_fs_proc_net_init(struct net *net)
228 {
229 return 0;
230 }
nfs_fs_proc_net_exit(struct net * net)231 static inline void nfs_fs_proc_net_exit(struct net *net)
232 {
233 }
nfs_fs_proc_init(void)234 static inline int nfs_fs_proc_init(void)
235 {
236 return 0;
237 }
nfs_fs_proc_exit(void)238 static inline void nfs_fs_proc_exit(void)
239 {
240 }
241 #endif
242
243 /* callback_xdr.c */
244 extern const struct svc_version nfs4_callback_version1;
245 extern const struct svc_version nfs4_callback_version4;
246
247 /* fs_context.c */
248 extern struct file_system_type nfs_fs_type;
249
250 /* pagelist.c */
251 extern int __init nfs_init_nfspagecache(void);
252 extern void nfs_destroy_nfspagecache(void);
253 extern int __init nfs_init_readpagecache(void);
254 extern void nfs_destroy_readpagecache(void);
255 extern int __init nfs_init_writepagecache(void);
256 extern void nfs_destroy_writepagecache(void);
257
258 extern int __init nfs_init_directcache(void);
259 extern void nfs_destroy_directcache(void);
260 extern void nfs_pgheader_init(struct nfs_pageio_descriptor *desc,
261 struct nfs_pgio_header *hdr,
262 void (*release)(struct nfs_pgio_header *hdr));
263 void nfs_set_pgio_error(struct nfs_pgio_header *hdr, int error, loff_t pos);
264 int nfs_iocounter_wait(struct nfs_lock_context *l_ctx);
265
266 extern const struct nfs_pageio_ops nfs_pgio_rw_ops;
267 struct nfs_pgio_header *nfs_pgio_header_alloc(const struct nfs_rw_ops *);
268 void nfs_pgio_header_free(struct nfs_pgio_header *);
269 int nfs_generic_pgio(struct nfs_pageio_descriptor *, struct nfs_pgio_header *);
270 int nfs_initiate_pgio(struct rpc_clnt *clnt, struct nfs_pgio_header *hdr,
271 const struct cred *cred, const struct nfs_rpc_ops *rpc_ops,
272 const struct rpc_call_ops *call_ops, int how, int flags);
273 void nfs_free_request(struct nfs_page *req);
274 struct nfs_pgio_mirror *
275 nfs_pgio_current_mirror(struct nfs_pageio_descriptor *desc);
276
nfs_match_open_context(const struct nfs_open_context * ctx1,const struct nfs_open_context * ctx2)277 static inline bool nfs_match_open_context(const struct nfs_open_context *ctx1,
278 const struct nfs_open_context *ctx2)
279 {
280 return cred_fscmp(ctx1->cred, ctx2->cred) == 0 && ctx1->state == ctx2->state;
281 }
282
283 /* nfs2xdr.c */
284 extern const struct rpc_procinfo nfs_procedures[];
285 extern int nfs2_decode_dirent(struct xdr_stream *,
286 struct nfs_entry *, bool);
287
288 /* nfs3xdr.c */
289 extern const struct rpc_procinfo nfs3_procedures[];
290 extern int nfs3_decode_dirent(struct xdr_stream *,
291 struct nfs_entry *, bool);
292
293 /* nfs4xdr.c */
294 #if IS_ENABLED(CONFIG_NFS_V4)
295 extern int nfs4_decode_dirent(struct xdr_stream *,
296 struct nfs_entry *, bool);
297 #endif
298 #ifdef CONFIG_NFS_V4_1
299 extern const u32 nfs41_maxread_overhead;
300 extern const u32 nfs41_maxwrite_overhead;
301 extern const u32 nfs41_maxgetdevinfo_overhead;
302 #endif
303
304 /* nfs4proc.c */
305 #if IS_ENABLED(CONFIG_NFS_V4)
306 extern const struct rpc_procinfo nfs4_procedures[];
307 #endif
308
309 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
310 extern struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags);
311 static inline struct nfs4_label *
nfs4_label_copy(struct nfs4_label * dst,struct nfs4_label * src)312 nfs4_label_copy(struct nfs4_label *dst, struct nfs4_label *src)
313 {
314 if (!dst || !src)
315 return NULL;
316
317 if (src->len > NFS4_MAXLABELLEN)
318 return NULL;
319
320 dst->lfs = src->lfs;
321 dst->pi = src->pi;
322 dst->len = src->len;
323 memcpy(dst->label, src->label, src->len);
324
325 return dst;
326 }
nfs4_label_free(struct nfs4_label * label)327 static inline void nfs4_label_free(struct nfs4_label *label)
328 {
329 if (label) {
330 kfree(label->label);
331 kfree(label);
332 }
333 return;
334 }
335
nfs_zap_label_cache_locked(struct nfs_inode * nfsi)336 static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi)
337 {
338 if (nfs_server_capable(&nfsi->vfs_inode, NFS_CAP_SECURITY_LABEL))
339 nfsi->cache_validity |= NFS_INO_INVALID_LABEL;
340 }
341 #else
nfs4_label_alloc(struct nfs_server * server,gfp_t flags)342 static inline struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags) { return NULL; }
nfs4_label_free(void * label)343 static inline void nfs4_label_free(void *label) {}
nfs_zap_label_cache_locked(struct nfs_inode * nfsi)344 static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi)
345 {
346 }
347 static inline struct nfs4_label *
nfs4_label_copy(struct nfs4_label * dst,struct nfs4_label * src)348 nfs4_label_copy(struct nfs4_label *dst, struct nfs4_label *src)
349 {
350 return NULL;
351 }
352 #endif /* CONFIG_NFS_V4_SECURITY_LABEL */
353
354 /* proc.c */
355 void nfs_close_context(struct nfs_open_context *ctx, int is_sync);
356 extern struct nfs_client *nfs_init_client(struct nfs_client *clp,
357 const struct nfs_client_initdata *);
358
359 /* dir.c */
360 extern void nfs_advise_use_readdirplus(struct inode *dir);
361 extern void nfs_force_use_readdirplus(struct inode *dir);
362 extern unsigned long nfs_access_cache_count(struct shrinker *shrink,
363 struct shrink_control *sc);
364 extern unsigned long nfs_access_cache_scan(struct shrinker *shrink,
365 struct shrink_control *sc);
366 struct dentry *nfs_lookup(struct inode *, struct dentry *, unsigned int);
367 int nfs_create(struct inode *, struct dentry *, umode_t, bool);
368 int nfs_mkdir(struct inode *, struct dentry *, umode_t);
369 int nfs_rmdir(struct inode *, struct dentry *);
370 int nfs_unlink(struct inode *, struct dentry *);
371 int nfs_symlink(struct inode *, struct dentry *, const char *);
372 int nfs_link(struct dentry *, struct inode *, struct dentry *);
373 int nfs_mknod(struct inode *, struct dentry *, umode_t, dev_t);
374 int nfs_rename(struct inode *, struct dentry *,
375 struct inode *, struct dentry *, unsigned int);
376
377 /* file.c */
378 int nfs_file_fsync(struct file *file, loff_t start, loff_t end, int datasync);
379 loff_t nfs_file_llseek(struct file *, loff_t, int);
380 ssize_t nfs_file_read(struct kiocb *, struct iov_iter *);
381 int nfs_file_mmap(struct file *, struct vm_area_struct *);
382 ssize_t nfs_file_write(struct kiocb *, struct iov_iter *);
383 int nfs_file_release(struct inode *, struct file *);
384 int nfs_lock(struct file *, int, struct file_lock *);
385 int nfs_flock(struct file *, int, struct file_lock *);
386 int nfs_check_flags(int);
387
388 /* inode.c */
389 extern struct workqueue_struct *nfsiod_workqueue;
390 extern struct inode *nfs_alloc_inode(struct super_block *sb);
391 extern void nfs_free_inode(struct inode *);
392 extern int nfs_write_inode(struct inode *, struct writeback_control *);
393 extern int nfs_drop_inode(struct inode *);
394 extern void nfs_clear_inode(struct inode *);
395 extern void nfs_evict_inode(struct inode *);
396 void nfs_zap_acl_cache(struct inode *inode);
397 extern bool nfs_check_cache_invalid(struct inode *, unsigned long);
398 extern int nfs_wait_bit_killable(struct wait_bit_key *key, int mode);
399 extern int nfs_wait_atomic_killable(atomic_t *p, unsigned int mode);
400
401 /* super.c */
402 extern const struct super_operations nfs_sops;
403 bool nfs_auth_info_match(const struct nfs_auth_info *, rpc_authflavor_t);
404 int nfs_try_get_tree(struct fs_context *);
405 int nfs_get_tree_common(struct fs_context *);
406 void nfs_kill_super(struct super_block *);
407
408 extern struct rpc_stat nfs_rpcstat;
409
410 extern int __init register_nfs_fs(void);
411 extern void __exit unregister_nfs_fs(void);
412 extern bool nfs_sb_active(struct super_block *sb);
413 extern void nfs_sb_deactive(struct super_block *sb);
414 extern int nfs_client_for_each_server(struct nfs_client *clp,
415 int (*fn)(struct nfs_server *, void *),
416 void *data);
417 /* io.c */
418 extern void nfs_start_io_read(struct inode *inode);
419 extern void nfs_end_io_read(struct inode *inode);
420 extern void nfs_start_io_write(struct inode *inode);
421 extern void nfs_end_io_write(struct inode *inode);
422 extern void nfs_start_io_direct(struct inode *inode);
423 extern void nfs_end_io_direct(struct inode *inode);
424
nfs_file_io_is_buffered(struct nfs_inode * nfsi)425 static inline bool nfs_file_io_is_buffered(struct nfs_inode *nfsi)
426 {
427 return test_bit(NFS_INO_ODIRECT, &nfsi->flags) == 0;
428 }
429
430 /* namespace.c */
431 #define NFS_PATH_CANONICAL 1
432 extern char *nfs_path(char **p, struct dentry *dentry,
433 char *buffer, ssize_t buflen, unsigned flags);
434 extern struct vfsmount *nfs_d_automount(struct path *path);
435 int nfs_submount(struct fs_context *, struct nfs_server *);
436 int nfs_do_submount(struct fs_context *);
437
438 /* getroot.c */
439 extern int nfs_get_root(struct super_block *s, struct fs_context *fc);
440 #if IS_ENABLED(CONFIG_NFS_V4)
441 extern int nfs4_get_rootfh(struct nfs_server *server, struct nfs_fh *mntfh, bool);
442 #endif
443
444 struct nfs_pgio_completion_ops;
445 /* read.c */
446 extern void nfs_pageio_init_read(struct nfs_pageio_descriptor *pgio,
447 struct inode *inode, bool force_mds,
448 const struct nfs_pgio_completion_ops *compl_ops);
449 extern void nfs_read_prepare(struct rpc_task *task, void *calldata);
450 extern void nfs_pageio_reset_read_mds(struct nfs_pageio_descriptor *pgio);
451
452 /* super.c */
453 void nfs_umount_begin(struct super_block *);
454 int nfs_statfs(struct dentry *, struct kstatfs *);
455 int nfs_show_options(struct seq_file *, struct dentry *);
456 int nfs_show_devname(struct seq_file *, struct dentry *);
457 int nfs_show_path(struct seq_file *, struct dentry *);
458 int nfs_show_stats(struct seq_file *, struct dentry *);
459 int nfs_reconfigure(struct fs_context *);
460
461 /* write.c */
462 extern void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio,
463 struct inode *inode, int ioflags, bool force_mds,
464 const struct nfs_pgio_completion_ops *compl_ops);
465 extern void nfs_pageio_reset_write_mds(struct nfs_pageio_descriptor *pgio);
466 extern void nfs_commit_free(struct nfs_commit_data *p);
467 extern void nfs_write_prepare(struct rpc_task *task, void *calldata);
468 extern void nfs_commit_prepare(struct rpc_task *task, void *calldata);
469 extern int nfs_initiate_commit(struct rpc_clnt *clnt,
470 struct nfs_commit_data *data,
471 const struct nfs_rpc_ops *nfs_ops,
472 const struct rpc_call_ops *call_ops,
473 int how, int flags);
474 extern void nfs_init_commit(struct nfs_commit_data *data,
475 struct list_head *head,
476 struct pnfs_layout_segment *lseg,
477 struct nfs_commit_info *cinfo);
478 int nfs_scan_commit_list(struct list_head *src, struct list_head *dst,
479 struct nfs_commit_info *cinfo, int max);
480 unsigned long nfs_reqs_to_commit(struct nfs_commit_info *);
481 int nfs_scan_commit(struct inode *inode, struct list_head *dst,
482 struct nfs_commit_info *cinfo);
483 void nfs_mark_request_commit(struct nfs_page *req,
484 struct pnfs_layout_segment *lseg,
485 struct nfs_commit_info *cinfo,
486 u32 ds_commit_idx);
487 int nfs_write_need_commit(struct nfs_pgio_header *);
488 void nfs_writeback_update_inode(struct nfs_pgio_header *hdr);
489 int nfs_generic_commit_list(struct inode *inode, struct list_head *head,
490 int how, struct nfs_commit_info *cinfo);
491 void nfs_retry_commit(struct list_head *page_list,
492 struct pnfs_layout_segment *lseg,
493 struct nfs_commit_info *cinfo,
494 u32 ds_commit_idx);
495 void nfs_commitdata_release(struct nfs_commit_data *data);
496 void nfs_request_add_commit_list(struct nfs_page *req,
497 struct nfs_commit_info *cinfo);
498 void nfs_request_add_commit_list_locked(struct nfs_page *req,
499 struct list_head *dst,
500 struct nfs_commit_info *cinfo);
501 void nfs_request_remove_commit_list(struct nfs_page *req,
502 struct nfs_commit_info *cinfo);
503 void nfs_init_cinfo(struct nfs_commit_info *cinfo,
504 struct inode *inode,
505 struct nfs_direct_req *dreq);
506 int nfs_key_timeout_notify(struct file *filp, struct inode *inode);
507 bool nfs_ctx_key_to_expire(struct nfs_open_context *ctx, struct inode *inode);
508 void nfs_pageio_stop_mirroring(struct nfs_pageio_descriptor *pgio);
509
510 int nfs_filemap_write_and_wait_range(struct address_space *mapping,
511 loff_t lstart, loff_t lend);
512
513 #ifdef CONFIG_NFS_V4_1
514 static inline void
pnfs_bucket_clear_pnfs_ds_commit_verifiers(struct pnfs_commit_bucket * buckets,unsigned int nbuckets)515 pnfs_bucket_clear_pnfs_ds_commit_verifiers(struct pnfs_commit_bucket *buckets,
516 unsigned int nbuckets)
517 {
518 unsigned int i;
519
520 for (i = 0; i < nbuckets; i++)
521 buckets[i].direct_verf.committed = NFS_INVALID_STABLE_HOW;
522 }
523 static inline
nfs_clear_pnfs_ds_commit_verifiers(struct pnfs_ds_commit_info * cinfo)524 void nfs_clear_pnfs_ds_commit_verifiers(struct pnfs_ds_commit_info *cinfo)
525 {
526 struct pnfs_commit_array *array;
527
528 rcu_read_lock();
529 list_for_each_entry_rcu(array, &cinfo->commits, cinfo_list)
530 pnfs_bucket_clear_pnfs_ds_commit_verifiers(array->buckets,
531 array->nbuckets);
532 rcu_read_unlock();
533 }
534 #else
535 static inline
nfs_clear_pnfs_ds_commit_verifiers(struct pnfs_ds_commit_info * cinfo)536 void nfs_clear_pnfs_ds_commit_verifiers(struct pnfs_ds_commit_info *cinfo)
537 {
538 }
539 #endif
540
541 #ifdef CONFIG_MIGRATION
542 extern int nfs_migrate_page(struct address_space *,
543 struct page *, struct page *, enum migrate_mode);
544 #endif
545
546 static inline int
nfs_write_verifier_cmp(const struct nfs_write_verifier * v1,const struct nfs_write_verifier * v2)547 nfs_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 static inline bool
nfs_write_match_verf(const struct nfs_writeverf * verf,struct nfs_page * req)554 nfs_write_match_verf(const struct nfs_writeverf *verf,
555 struct nfs_page *req)
556 {
557 return verf->committed > NFS_UNSTABLE &&
558 !nfs_write_verifier_cmp(&req->wb_verf, &verf->verifier);
559 }
560
561 /* unlink.c */
562 extern struct rpc_task *
563 nfs_async_rename(struct inode *old_dir, struct inode *new_dir,
564 struct dentry *old_dentry, struct dentry *new_dentry,
565 void (*complete)(struct rpc_task *, struct nfs_renamedata *));
566 extern int nfs_sillyrename(struct inode *dir, struct dentry *dentry);
567
568 /* direct.c */
569 void nfs_init_cinfo_from_dreq(struct nfs_commit_info *cinfo,
570 struct nfs_direct_req *dreq);
571 extern ssize_t nfs_dreq_bytes_left(struct nfs_direct_req *dreq);
572
573 /* nfs4proc.c */
574 extern struct nfs_client *nfs4_init_client(struct nfs_client *clp,
575 const struct nfs_client_initdata *);
576 extern int nfs40_walk_client_list(struct nfs_client *clp,
577 struct nfs_client **result,
578 const struct cred *cred);
579 extern int nfs41_walk_client_list(struct nfs_client *clp,
580 struct nfs_client **result,
581 const struct cred *cred);
582 extern void nfs4_test_session_trunk(struct rpc_clnt *clnt,
583 struct rpc_xprt *xprt,
584 void *data);
585
nfs_igrab_and_active(struct inode * inode)586 static inline struct inode *nfs_igrab_and_active(struct inode *inode)
587 {
588 inode = igrab(inode);
589 if (inode != NULL && !nfs_sb_active(inode->i_sb)) {
590 iput(inode);
591 inode = NULL;
592 }
593 return inode;
594 }
595
nfs_iput_and_deactive(struct inode * inode)596 static inline void nfs_iput_and_deactive(struct inode *inode)
597 {
598 if (inode != NULL) {
599 struct super_block *sb = inode->i_sb;
600
601 iput(inode);
602 nfs_sb_deactive(sb);
603 }
604 }
605
606 /*
607 * Determine the device name as a string
608 */
nfs_devname(struct dentry * dentry,char * buffer,ssize_t buflen)609 static inline char *nfs_devname(struct dentry *dentry,
610 char *buffer, ssize_t buflen)
611 {
612 char *dummy;
613 return nfs_path(&dummy, dentry, buffer, buflen, NFS_PATH_CANONICAL);
614 }
615
616 /*
617 * Determine the actual block size (and log2 thereof)
618 */
619 static inline
nfs_block_bits(unsigned long bsize,unsigned char * nrbitsp)620 unsigned long nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp)
621 {
622 /* make sure blocksize is a power of two */
623 if ((bsize & (bsize - 1)) || nrbitsp) {
624 unsigned char nrbits;
625
626 for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--)
627 ;
628 bsize = 1 << nrbits;
629 if (nrbitsp)
630 *nrbitsp = nrbits;
631 }
632
633 return bsize;
634 }
635
636 /*
637 * Calculate the number of 512byte blocks used.
638 */
nfs_calc_block_size(u64 tsize)639 static inline blkcnt_t nfs_calc_block_size(u64 tsize)
640 {
641 blkcnt_t used = (tsize + 511) >> 9;
642 return (used > ULONG_MAX) ? ULONG_MAX : used;
643 }
644
645 /*
646 * Compute and set NFS server blocksize
647 */
648 static inline
nfs_block_size(unsigned long bsize,unsigned char * nrbitsp)649 unsigned long nfs_block_size(unsigned long bsize, unsigned char *nrbitsp)
650 {
651 if (bsize < NFS_MIN_FILE_IO_SIZE)
652 bsize = NFS_DEF_FILE_IO_SIZE;
653 else if (bsize >= NFS_MAX_FILE_IO_SIZE)
654 bsize = NFS_MAX_FILE_IO_SIZE;
655
656 return nfs_block_bits(bsize, nrbitsp);
657 }
658
659 /*
660 * Determine the maximum file size for a superblock
661 */
662 static inline
nfs_super_set_maxbytes(struct super_block * sb,__u64 maxfilesize)663 void nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize)
664 {
665 sb->s_maxbytes = (loff_t)maxfilesize;
666 if (sb->s_maxbytes > MAX_LFS_FILESIZE || sb->s_maxbytes <= 0)
667 sb->s_maxbytes = MAX_LFS_FILESIZE;
668 }
669
670 /*
671 * Record the page as unstable (an extra writeback period) and mark its
672 * inode as dirty.
673 */
674 static inline
nfs_mark_page_unstable(struct page * page,struct nfs_commit_info * cinfo)675 void nfs_mark_page_unstable(struct page *page, struct nfs_commit_info *cinfo)
676 {
677 if (!cinfo->dreq) {
678 struct inode *inode = page_file_mapping(page)->host;
679
680 /* This page is really still in write-back - just that the
681 * writeback is happening on the server now.
682 */
683 inc_node_page_state(page, NR_WRITEBACK);
684 inc_wb_stat(&inode_to_bdi(inode)->wb, WB_WRITEBACK);
685 __mark_inode_dirty(inode, I_DIRTY_DATASYNC);
686 }
687 }
688
689 /*
690 * Determine the number of bytes of data the page contains
691 */
692 static inline
nfs_page_length(struct page * page)693 unsigned int nfs_page_length(struct page *page)
694 {
695 loff_t i_size = i_size_read(page_file_mapping(page)->host);
696
697 if (i_size > 0) {
698 pgoff_t index = page_index(page);
699 pgoff_t end_index = (i_size - 1) >> PAGE_SHIFT;
700 if (index < end_index)
701 return PAGE_SIZE;
702 if (index == end_index)
703 return ((i_size - 1) & ~PAGE_MASK) + 1;
704 }
705 return 0;
706 }
707
708 /*
709 * Convert a umode to a dirent->d_type
710 */
711 static inline
nfs_umode_to_dtype(umode_t mode)712 unsigned char nfs_umode_to_dtype(umode_t mode)
713 {
714 return (mode >> 12) & 15;
715 }
716
717 /*
718 * Determine the number of pages in an array of length 'len' and
719 * with a base offset of 'base'
720 */
721 static inline
nfs_page_array_len(unsigned int base,size_t len)722 unsigned int nfs_page_array_len(unsigned int base, size_t len)
723 {
724 return ((unsigned long)len + (unsigned long)base +
725 PAGE_SIZE - 1) >> PAGE_SHIFT;
726 }
727
728 /*
729 * Convert a struct timespec64 into a 64-bit change attribute
730 *
731 * This does approximately the same thing as timespec64_to_ns(),
732 * but for calculation efficiency, we multiply the seconds by
733 * 1024*1024*1024.
734 */
735 static inline
nfs_timespec_to_change_attr(const struct timespec64 * ts)736 u64 nfs_timespec_to_change_attr(const struct timespec64 *ts)
737 {
738 return ((u64)ts->tv_sec << 30) + ts->tv_nsec;
739 }
740
741 #ifdef CONFIG_CRC32
742 /**
743 * nfs_fhandle_hash - calculate the crc32 hash for the filehandle
744 * @fh - pointer to filehandle
745 *
746 * returns a crc32 hash for the filehandle that is compatible with
747 * the one displayed by "wireshark".
748 */
nfs_fhandle_hash(const struct nfs_fh * fh)749 static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh)
750 {
751 return ~crc32_le(0xFFFFFFFF, &fh->data[0], fh->size);
752 }
nfs_stateid_hash(const nfs4_stateid * stateid)753 static inline u32 nfs_stateid_hash(const nfs4_stateid *stateid)
754 {
755 return ~crc32_le(0xFFFFFFFF, &stateid->other[0],
756 NFS4_STATEID_OTHER_SIZE);
757 }
758 #else
nfs_fhandle_hash(const struct nfs_fh * fh)759 static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh)
760 {
761 return 0;
762 }
nfs_stateid_hash(nfs4_stateid * stateid)763 static inline u32 nfs_stateid_hash(nfs4_stateid *stateid)
764 {
765 return 0;
766 }
767 #endif
768
nfs_error_is_fatal(int err)769 static inline bool nfs_error_is_fatal(int err)
770 {
771 switch (err) {
772 case -ERESTARTSYS:
773 case -EINTR:
774 case -EACCES:
775 case -EDQUOT:
776 case -EFBIG:
777 case -EIO:
778 case -ENOSPC:
779 case -EROFS:
780 case -ESTALE:
781 case -E2BIG:
782 case -ENOMEM:
783 case -ETIMEDOUT:
784 return true;
785 default:
786 return false;
787 }
788 }
789
nfs_error_is_fatal_on_server(int err)790 static inline bool nfs_error_is_fatal_on_server(int err)
791 {
792 switch (err) {
793 case 0:
794 case -ERESTARTSYS:
795 case -EINTR:
796 return false;
797 }
798 return nfs_error_is_fatal(err);
799 }
800
801 /*
802 * Select between a default port value and a user-specified port value.
803 * If a zero value is set, then autobind will be used.
804 */
nfs_set_port(struct sockaddr * sap,int * port,const unsigned short default_port)805 static inline void nfs_set_port(struct sockaddr *sap, int *port,
806 const unsigned short default_port)
807 {
808 if (*port == NFS_UNSPEC_PORT)
809 *port = default_port;
810
811 rpc_set_port(sap, *port);
812 }
813
