1
2
3
4
5#include "nfs4_fs.h"
6#include <linux/mount.h>
7#include <linux/security.h>
8
9#define NFS_MS_MASK (MS_RDONLY|MS_NOSUID|MS_NODEV|MS_NOEXEC|MS_SYNCHRONOUS)
10
11struct nfs_string;
12
13
14
15
16
17
18
19#define NFS_MAX_READAHEAD (RPC_DEF_SLOT_TABLE - 1)
20
21
22
23
24static inline int nfs4_has_session(const struct nfs_client *clp)
25{
26#ifdef CONFIG_NFS_V4_1
27 if (clp->cl_session)
28 return 1;
29#endif
30 return 0;
31}
32
33static inline int nfs4_has_persistent_session(const struct nfs_client *clp)
34{
35#ifdef CONFIG_NFS_V4_1
36 if (nfs4_has_session(clp))
37 return (clp->cl_session->flags & SESSION4_PERSIST);
38#endif
39 return 0;
40}
41
42static inline void nfs_attr_check_mountpoint(struct super_block *parent, struct nfs_fattr *fattr)
43{
44 if (!nfs_fsid_equal(&NFS_SB(parent)->fsid, &fattr->fsid))
45 fattr->valid |= NFS_ATTR_FATTR_MOUNTPOINT;
46}
47
48static inline int nfs_attr_use_mounted_on_fileid(struct nfs_fattr *fattr)
49{
50 if (((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) == 0) ||
51 (((fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT) == 0) &&
52 ((fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) == 0)))
53 return 0;
54
55 fattr->fileid = fattr->mounted_on_fileid;
56 return 1;
57}
58
59struct nfs_clone_mount {
60 const struct super_block *sb;
61 const struct dentry *dentry;
62 struct nfs_fh *fh;
63 struct nfs_fattr *fattr;
64 char *hostname;
65 char *mnt_path;
66 struct sockaddr *addr;
67 size_t addrlen;
68 rpc_authflavor_t authflavor;
69};
70
71
72
73
74
75#define NFS_MAX_SECFLAVORS (12)
76
77
78
79
80#define NFS_UNSPEC_PORT (-1)
81
82
83
84
85
86#define NFS_MAX_READDIR_PAGES 8
87
88struct nfs_client_initdata {
89 unsigned long init_flags;
90 const char *hostname;
91 const struct sockaddr *addr;
92 size_t addrlen;
93 struct nfs_subversion *nfs_mod;
94 int proto;
95 u32 minorversion;
96 struct net *net;
97};
98
99
100
101
102struct nfs_parsed_mount_data {
103 int flags;
104 unsigned int rsize, wsize;
105 unsigned int timeo, retrans;
106 unsigned int acregmin, acregmax,
107 acdirmin, acdirmax;
108 unsigned int namlen;
109 unsigned int options;
110 unsigned int bsize;
111 unsigned int auth_flavor_len;
112 rpc_authflavor_t auth_flavors[1];
113 char *client_address;
114 unsigned int version;
115 unsigned int minorversion;
116 char *fscache_uniq;
117 bool need_mount;
118
119 struct {
120 struct sockaddr_storage address;
121 size_t addrlen;
122 char *hostname;
123 u32 version;
124 int port;
125 unsigned short protocol;
126 } mount_server;
127
128 struct {
129 struct sockaddr_storage address;
130 size_t addrlen;
131 char *hostname;
132 char *export_path;
133 int port;
134 unsigned short protocol;
135 } nfs_server;
136
137 struct security_mnt_opts lsm_opts;
138 struct net *net;
139};
140
141
142struct nfs_mount_request {
143 struct sockaddr *sap;
144 size_t salen;
145 char *hostname;
146 char *dirpath;
147 u32 version;
148 unsigned short protocol;
149 struct nfs_fh *fh;
150 int noresvport;
151 unsigned int *auth_flav_len;
152 rpc_authflavor_t *auth_flavs;
153 struct net *net;
154};
155
156struct nfs_mount_info {
157 void (*fill_super)(struct super_block *, struct nfs_mount_info *);
158 int (*set_security)(struct super_block *, struct dentry *, struct nfs_mount_info *);
159 struct nfs_parsed_mount_data *parsed;
160 struct nfs_clone_mount *cloned;
161 struct nfs_fh *mntfh;
162};
163
164extern int nfs_mount(struct nfs_mount_request *info);
165extern void nfs_umount(const struct nfs_mount_request *info);
166
167
168extern const struct rpc_program nfs_program;
169extern void nfs_clients_init(struct net *net);
170extern struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *);
171int nfs_create_rpc_client(struct nfs_client *, const struct rpc_timeout *, rpc_authflavor_t);
172struct nfs_client *nfs_get_client(const struct nfs_client_initdata *,
173 const struct rpc_timeout *, const char *,
174 rpc_authflavor_t);
175int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *, struct nfs_fattr *);
176void nfs_server_insert_lists(struct nfs_server *);
177void nfs_init_timeout_values(struct rpc_timeout *, int, unsigned int, unsigned int);
178int nfs_init_server_rpcclient(struct nfs_server *, const struct rpc_timeout *t,
179 rpc_authflavor_t);
180struct nfs_server *nfs_alloc_server(void);
181void nfs_server_copy_userdata(struct nfs_server *, struct nfs_server *);
182
183extern void nfs_cleanup_cb_ident_idr(struct net *);
184extern void nfs_put_client(struct nfs_client *);
185extern void nfs_free_client(struct nfs_client *);
186extern struct nfs_client *nfs4_find_client_ident(struct net *, int);
187extern struct nfs_client *
188nfs4_find_client_sessionid(struct net *, const struct sockaddr *,
189 struct nfs4_sessionid *);
190extern struct nfs_server *nfs_create_server(struct nfs_mount_info *,
191 struct nfs_subversion *);
192extern struct nfs_server *nfs4_create_server(
193 struct nfs_mount_info *,
194 struct nfs_subversion *);
195extern struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *,
196 struct nfs_fh *);
197extern void nfs_free_server(struct nfs_server *server);
198extern struct nfs_server *nfs_clone_server(struct nfs_server *,
199 struct nfs_fh *,
200 struct nfs_fattr *,
201 rpc_authflavor_t);
202extern int nfs_wait_client_init_complete(const struct nfs_client *clp);
203extern void nfs_mark_client_ready(struct nfs_client *clp, int state);
204extern struct nfs_client *nfs4_set_ds_client(struct nfs_client* mds_clp,
205 const struct sockaddr *ds_addr,
206 int ds_addrlen, int ds_proto,
207 unsigned int ds_timeo,
208 unsigned int ds_retrans);
209#ifdef CONFIG_PROC_FS
210extern int __init nfs_fs_proc_init(void);
211extern void nfs_fs_proc_exit(void);
212#else
213static inline int nfs_fs_proc_init(void)
214{
215 return 0;
216}
217static inline void nfs_fs_proc_exit(void)
218{
219}
220#endif
221
222#ifdef CONFIG_NFS_V4_1
223int nfs_sockaddr_match_ipaddr(const struct sockaddr *, const struct sockaddr *);
224#endif
225
226
227#if IS_ENABLED(CONFIG_NFS_V3)
228struct nfs_server *nfs3_create_server(struct nfs_mount_info *, struct nfs_subversion *);
229struct nfs_server *nfs3_clone_server(struct nfs_server *, struct nfs_fh *,
230 struct nfs_fattr *, rpc_authflavor_t);
231#endif
232
233
234extern struct svc_version nfs4_callback_version1;
235extern struct svc_version nfs4_callback_version4;
236
237struct nfs_pageio_descriptor;
238
239extern int __init nfs_init_nfspagecache(void);
240extern void nfs_destroy_nfspagecache(void);
241extern int __init nfs_init_readpagecache(void);
242extern void nfs_destroy_readpagecache(void);
243extern int __init nfs_init_writepagecache(void);
244extern void nfs_destroy_writepagecache(void);
245
246extern int __init nfs_init_directcache(void);
247extern void nfs_destroy_directcache(void);
248extern bool nfs_pgarray_set(struct nfs_page_array *p, unsigned int pagecount);
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);
253
254
255extern struct rpc_procinfo nfs_procedures[];
256extern int nfs2_decode_dirent(struct xdr_stream *,
257 struct nfs_entry *, int);
258
259
260extern struct rpc_procinfo nfs3_procedures[];
261extern int nfs3_decode_dirent(struct xdr_stream *,
262 struct nfs_entry *, int);
263
264
265#if IS_ENABLED(CONFIG_NFS_V4)
266extern int nfs4_decode_dirent(struct xdr_stream *,
267 struct nfs_entry *, int);
268#endif
269#ifdef CONFIG_NFS_V4_1
270extern const u32 nfs41_maxread_overhead;
271extern const u32 nfs41_maxwrite_overhead;
272#endif
273
274
275#if IS_ENABLED(CONFIG_NFS_V4)
276extern struct rpc_procinfo nfs4_procedures[];
277#endif
278
279extern int nfs4_init_ds_session(struct nfs_client *, unsigned long);
280
281
282void nfs_close_context(struct nfs_open_context *ctx, int is_sync);
283extern struct nfs_client *nfs_init_client(struct nfs_client *clp,
284 const struct rpc_timeout *timeparms,
285 const char *ip_addr, rpc_authflavor_t authflavour);
286
287
288extern int nfs_access_cache_shrinker(struct shrinker *shrink,
289 struct shrink_control *sc);
290struct dentry *nfs_lookup(struct inode *, struct dentry *, unsigned int);
291int nfs_create(struct inode *, struct dentry *, umode_t, bool);
292int nfs_mkdir(struct inode *, struct dentry *, umode_t);
293int nfs_rmdir(struct inode *, struct dentry *);
294int nfs_unlink(struct inode *, struct dentry *);
295int nfs_symlink(struct inode *, struct dentry *, const char *);
296int nfs_link(struct dentry *, struct inode *, struct dentry *);
297int nfs_mknod(struct inode *, struct dentry *, umode_t, dev_t);
298int nfs_rename(struct inode *, struct dentry *, struct inode *, struct dentry *);
299
300
301int nfs_file_fsync_commit(struct file *, loff_t, loff_t, int);
302loff_t nfs_file_llseek(struct file *, loff_t, int);
303int nfs_file_flush(struct file *, fl_owner_t);
304ssize_t nfs_file_read(struct kiocb *, const struct iovec *, unsigned long, loff_t);
305ssize_t nfs_file_splice_read(struct file *, loff_t *, struct pipe_inode_info *,
306 size_t, unsigned int);
307int nfs_file_mmap(struct file *, struct vm_area_struct *);
308ssize_t nfs_file_write(struct kiocb *, const struct iovec *, unsigned long, loff_t);
309int nfs_file_release(struct inode *, struct file *);
310int nfs_lock(struct file *, int, struct file_lock *);
311int nfs_flock(struct file *, int, struct file_lock *);
312ssize_t nfs_file_splice_write(struct pipe_inode_info *, struct file *, loff_t *,
313 size_t, unsigned int);
314int nfs_check_flags(int);
315int nfs_setlease(struct file *, long, struct file_lock **);
316
317
318extern struct workqueue_struct *nfsiod_workqueue;
319extern struct inode *nfs_alloc_inode(struct super_block *sb);
320extern void nfs_destroy_inode(struct inode *);
321extern int nfs_write_inode(struct inode *, struct writeback_control *);
322extern void nfs_clear_inode(struct inode *);
323extern void nfs_evict_inode(struct inode *);
324void nfs_zap_acl_cache(struct inode *inode);
325extern int nfs_wait_bit_killable(void *word);
326
327
328extern const struct super_operations nfs_sops;
329extern struct file_system_type nfs_fs_type;
330extern struct file_system_type nfs_xdev_fs_type;
331#if IS_ENABLED(CONFIG_NFS_V4)
332extern struct file_system_type nfs4_xdev_fs_type;
333extern struct file_system_type nfs4_referral_fs_type;
334#endif
335struct dentry *nfs_try_mount(int, const char *, struct nfs_mount_info *,
336 struct nfs_subversion *);
337void nfs_initialise_sb(struct super_block *);
338int nfs_set_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *);
339int nfs_clone_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *);
340struct dentry *nfs_fs_mount_common(struct nfs_server *, int, const char *,
341 struct nfs_mount_info *, struct nfs_subversion *);
342struct dentry *nfs_fs_mount(struct file_system_type *, int, const char *, void *);
343struct dentry * nfs_xdev_mount_common(struct file_system_type *, int,
344 const char *, struct nfs_mount_info *);
345void nfs_kill_super(struct super_block *);
346void nfs_fill_super(struct super_block *, struct nfs_mount_info *);
347
348extern struct rpc_stat nfs_rpcstat;
349
350extern int __init register_nfs_fs(void);
351extern void __exit unregister_nfs_fs(void);
352extern void nfs_sb_active(struct super_block *sb);
353extern void nfs_sb_deactive(struct super_block *sb);
354extern void nfs_sb_deactive_async(struct super_block *sb);
355
356
357#define NFS_PATH_CANONICAL 1
358extern char *nfs_path(char **p, struct dentry *dentry,
359 char *buffer, ssize_t buflen, unsigned flags);
360extern struct vfsmount *nfs_d_automount(struct path *path);
361struct vfsmount *nfs_submount(struct nfs_server *, struct dentry *,
362 struct nfs_fh *, struct nfs_fattr *);
363struct vfsmount *nfs_do_submount(struct dentry *, struct nfs_fh *,
364 struct nfs_fattr *, rpc_authflavor_t);
365
366
367extern struct dentry *nfs_get_root(struct super_block *, struct nfs_fh *,
368 const char *);
369#if IS_ENABLED(CONFIG_NFS_V4)
370extern struct dentry *nfs4_get_root(struct super_block *, struct nfs_fh *,
371 const char *);
372
373extern int nfs4_get_rootfh(struct nfs_server *server, struct nfs_fh *mntfh);
374#endif
375
376struct nfs_pgio_completion_ops;
377
378extern struct nfs_read_header *nfs_readhdr_alloc(void);
379extern void nfs_readhdr_free(struct nfs_pgio_header *hdr);
380extern void nfs_pageio_init_read(struct nfs_pageio_descriptor *pgio,
381 struct inode *inode,
382 const struct nfs_pgio_completion_ops *compl_ops);
383extern int nfs_initiate_read(struct rpc_clnt *clnt,
384 struct nfs_read_data *data,
385 const struct rpc_call_ops *call_ops, int flags);
386extern void nfs_read_prepare(struct rpc_task *task, void *calldata);
387extern int nfs_generic_pagein(struct nfs_pageio_descriptor *desc,
388 struct nfs_pgio_header *hdr);
389extern void nfs_pageio_init_read(struct nfs_pageio_descriptor *pgio,
390 struct inode *inode,
391 const struct nfs_pgio_completion_ops *compl_ops);
392extern void nfs_pageio_reset_read_mds(struct nfs_pageio_descriptor *pgio);
393extern void nfs_readdata_release(struct nfs_read_data *rdata);
394
395
396void nfs_clone_super(struct super_block *, struct nfs_mount_info *);
397void nfs_umount_begin(struct super_block *);
398int nfs_statfs(struct dentry *, struct kstatfs *);
399int nfs_show_options(struct seq_file *, struct dentry *);
400int nfs_show_devname(struct seq_file *, struct dentry *);
401int nfs_show_path(struct seq_file *, struct dentry *);
402int nfs_show_stats(struct seq_file *, struct dentry *);
403void nfs_put_super(struct super_block *);
404int nfs_remount(struct super_block *sb, int *flags, char *raw_data);
405
406
407extern void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio,
408 struct inode *inode, int ioflags,
409 const struct nfs_pgio_completion_ops *compl_ops);
410extern struct nfs_write_header *nfs_writehdr_alloc(void);
411extern void nfs_writehdr_free(struct nfs_pgio_header *hdr);
412extern int nfs_generic_flush(struct nfs_pageio_descriptor *desc,
413 struct nfs_pgio_header *hdr);
414extern void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio,
415 struct inode *inode, int ioflags,
416 const struct nfs_pgio_completion_ops *compl_ops);
417extern void nfs_pageio_reset_write_mds(struct nfs_pageio_descriptor *pgio);
418extern void nfs_writedata_release(struct nfs_write_data *wdata);
419extern void nfs_commit_free(struct nfs_commit_data *p);
420extern int nfs_initiate_write(struct rpc_clnt *clnt,
421 struct nfs_write_data *data,
422 const struct rpc_call_ops *call_ops,
423 int how, int flags);
424extern void nfs_write_prepare(struct rpc_task *task, void *calldata);
425extern void nfs_commit_prepare(struct rpc_task *task, void *calldata);
426extern int nfs_initiate_commit(struct rpc_clnt *clnt,
427 struct nfs_commit_data *data,
428 const struct rpc_call_ops *call_ops,
429 int how, int flags);
430extern void nfs_init_commit(struct nfs_commit_data *data,
431 struct list_head *head,
432 struct pnfs_layout_segment *lseg,
433 struct nfs_commit_info *cinfo);
434int nfs_scan_commit_list(struct list_head *src, struct list_head *dst,
435 struct nfs_commit_info *cinfo, int max);
436int nfs_scan_commit(struct inode *inode, struct list_head *dst,
437 struct nfs_commit_info *cinfo);
438void nfs_mark_request_commit(struct nfs_page *req,
439 struct pnfs_layout_segment *lseg,
440 struct nfs_commit_info *cinfo);
441int nfs_generic_commit_list(struct inode *inode, struct list_head *head,
442 int how, struct nfs_commit_info *cinfo);
443void nfs_retry_commit(struct list_head *page_list,
444 struct pnfs_layout_segment *lseg,
445 struct nfs_commit_info *cinfo);
446void nfs_commitdata_release(struct nfs_commit_data *data);
447void nfs_request_add_commit_list(struct nfs_page *req, struct list_head *dst,
448 struct nfs_commit_info *cinfo);
449void nfs_request_remove_commit_list(struct nfs_page *req,
450 struct nfs_commit_info *cinfo);
451void nfs_init_cinfo(struct nfs_commit_info *cinfo,
452 struct inode *inode,
453 struct nfs_direct_req *dreq);
454
455#ifdef CONFIG_MIGRATION
456extern int nfs_migrate_page(struct address_space *,
457 struct page *, struct page *, enum migrate_mode);
458#else
459#define nfs_migrate_page NULL
460#endif
461
462
463void nfs_init_cinfo_from_dreq(struct nfs_commit_info *cinfo,
464 struct nfs_direct_req *dreq);
465static inline void nfs_inode_dio_wait(struct inode *inode)
466{
467 inode_dio_wait(inode);
468}
469extern ssize_t nfs_dreq_bytes_left(struct nfs_direct_req *dreq);
470
471
472extern void __nfs4_read_done_cb(struct nfs_read_data *);
473extern struct nfs_client *nfs4_init_client(struct nfs_client *clp,
474 const struct rpc_timeout *timeparms,
475 const char *ip_addr,
476 rpc_authflavor_t authflavour);
477extern int _nfs4_call_sync(struct rpc_clnt *clnt,
478 struct nfs_server *server,
479 struct rpc_message *msg,
480 struct nfs4_sequence_args *args,
481 struct nfs4_sequence_res *res,
482 int cache_reply);
483extern int _nfs4_call_sync_session(struct rpc_clnt *clnt,
484 struct nfs_server *server,
485 struct rpc_message *msg,
486 struct nfs4_sequence_args *args,
487 struct nfs4_sequence_res *res,
488 int cache_reply);
489extern int nfs40_walk_client_list(struct nfs_client *clp,
490 struct nfs_client **result,
491 struct rpc_cred *cred);
492extern int nfs41_walk_client_list(struct nfs_client *clp,
493 struct nfs_client **result,
494 struct rpc_cred *cred);
495
496
497
498
499static inline char *nfs_devname(struct dentry *dentry,
500 char *buffer, ssize_t buflen)
501{
502 char *dummy;
503 return nfs_path(&dummy, dentry, buffer, buflen, NFS_PATH_CANONICAL);
504}
505
506
507
508
509static inline
510unsigned long nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp)
511{
512
513 if ((bsize & (bsize - 1)) || nrbitsp) {
514 unsigned char nrbits;
515
516 for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--)
517 ;
518 bsize = 1 << nrbits;
519 if (nrbitsp)
520 *nrbitsp = nrbits;
521 }
522
523 return bsize;
524}
525
526
527
528
529static inline blkcnt_t nfs_calc_block_size(u64 tsize)
530{
531 blkcnt_t used = (tsize + 511) >> 9;
532 return (used > ULONG_MAX) ? ULONG_MAX : used;
533}
534
535
536
537
538static inline
539unsigned long nfs_block_size(unsigned long bsize, unsigned char *nrbitsp)
540{
541 if (bsize < NFS_MIN_FILE_IO_SIZE)
542 bsize = NFS_DEF_FILE_IO_SIZE;
543 else if (bsize >= NFS_MAX_FILE_IO_SIZE)
544 bsize = NFS_MAX_FILE_IO_SIZE;
545
546 return nfs_block_bits(bsize, nrbitsp);
547}
548
549
550
551
552static inline
553void nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize)
554{
555 sb->s_maxbytes = (loff_t)maxfilesize;
556 if (sb->s_maxbytes > MAX_LFS_FILESIZE || sb->s_maxbytes <= 0)
557 sb->s_maxbytes = MAX_LFS_FILESIZE;
558}
559
560
561
562
563static inline
564unsigned int nfs_page_length(struct page *page)
565{
566 loff_t i_size = i_size_read(page_file_mapping(page)->host);
567
568 if (i_size > 0) {
569 pgoff_t page_index = page_file_index(page);
570 pgoff_t end_index = (i_size - 1) >> PAGE_CACHE_SHIFT;
571 if (page_index < end_index)
572 return PAGE_CACHE_SIZE;
573 if (page_index == end_index)
574 return ((i_size - 1) & ~PAGE_CACHE_MASK) + 1;
575 }
576 return 0;
577}
578
579
580
581
582static inline
583unsigned char nfs_umode_to_dtype(umode_t mode)
584{
585 return (mode >> 12) & 15;
586}
587
588
589
590
591
592static inline
593unsigned int nfs_page_array_len(unsigned int base, size_t len)
594{
595 return ((unsigned long)len + (unsigned long)base +
596 PAGE_SIZE - 1) >> PAGE_SHIFT;
597}
598
599
600
601
602
603
604
605
606static inline
607u64 nfs_timespec_to_change_attr(const struct timespec *ts)
608{
609 return ((u64)ts->tv_sec << 30) + ts->tv_nsec;
610}
611
