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
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
34 fattr->fileid = fattr->mounted_on_fileid;
35 return 1;
36}
37
38struct nfs_clone_mount {
39 const struct super_block *sb;
40 const struct dentry *dentry;
41 struct nfs_fh *fh;
42 struct nfs_fattr *fattr;
43 char *hostname;
44 char *mnt_path;
45 struct sockaddr *addr;
46 size_t addrlen;
47 rpc_authflavor_t authflavor;
48};
49
50
51
52
53
54#define NFS_MAX_SECFLAVORS (12)
55
56
57
58
59#define NFS_UNSPEC_PORT (-1)
60
61
62
63
64
65#define NFS_MAX_READDIR_PAGES 8
66
67struct nfs_client_initdata {
68 unsigned long init_flags;
69 const char *hostname;
70 const struct sockaddr *addr;
71 size_t addrlen;
72 struct nfs_subversion *nfs_mod;
73 int proto;
74 u32 minorversion;
75 struct net *net;
76};
77
78
79
80
81struct nfs_parsed_mount_data {
82 int flags;
83 unsigned int rsize, wsize;
84 unsigned int timeo, retrans;
85 unsigned int acregmin, acregmax,
86 acdirmin, acdirmax;
87 unsigned int namlen;
88 unsigned int options;
89 unsigned int bsize;
90 unsigned int auth_flavor_len;
91 rpc_authflavor_t auth_flavors[1];
92 char *client_address;
93 unsigned int version;
94 unsigned int minorversion;
95 char *fscache_uniq;
96 bool need_mount;
97
98 struct {
99 struct sockaddr_storage address;
100 size_t addrlen;
101 char *hostname;
102 u32 version;
103 int port;
104 unsigned short protocol;
105 } mount_server;
106
107 struct {
108 struct sockaddr_storage address;
109 size_t addrlen;
110 char *hostname;
111 char *export_path;
112 int port;
113 unsigned short protocol;
114 } nfs_server;
115
116 struct security_mnt_opts lsm_opts;
117 struct net *net;
118};
119
120
121struct nfs_mount_request {
122 struct sockaddr *sap;
123 size_t salen;
124 char *hostname;
125 char *dirpath;
126 u32 version;
127 unsigned short protocol;
128 struct nfs_fh *fh;
129 int noresvport;
130 unsigned int *auth_flav_len;
131 rpc_authflavor_t *auth_flavs;
132 struct net *net;
133};
134
135struct nfs_mount_info {
136 void (*fill_super)(struct super_block *, struct nfs_mount_info *);
137 int (*set_security)(struct super_block *, struct dentry *, struct nfs_mount_info *);
138 struct nfs_parsed_mount_data *parsed;
139 struct nfs_clone_mount *cloned;
140 struct nfs_fh *mntfh;
141};
142
143extern int nfs_mount(struct nfs_mount_request *info);
144extern void nfs_umount(const struct nfs_mount_request *info);
145
146
147extern const struct rpc_program nfs_program;
148extern void nfs_clients_init(struct net *net);
149extern struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *);
150int nfs_create_rpc_client(struct nfs_client *, const struct rpc_timeout *, rpc_authflavor_t);
151struct nfs_client *nfs_get_client(const struct nfs_client_initdata *,
152 const struct rpc_timeout *, const char *,
153 rpc_authflavor_t);
154int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *, struct nfs_fattr *);
155void nfs_server_insert_lists(struct nfs_server *);
156void nfs_init_timeout_values(struct rpc_timeout *, int, unsigned int, unsigned int);
157int nfs_init_server_rpcclient(struct nfs_server *, const struct rpc_timeout *t,
158 rpc_authflavor_t);
159struct nfs_server *nfs_alloc_server(void);
160void nfs_server_copy_userdata(struct nfs_server *, struct nfs_server *);
161
162extern void nfs_cleanup_cb_ident_idr(struct net *);
163extern void nfs_put_client(struct nfs_client *);
164extern void nfs_free_client(struct nfs_client *);
165extern struct nfs_client *nfs4_find_client_ident(struct net *, int);
166extern struct nfs_client *
167nfs4_find_client_sessionid(struct net *, const struct sockaddr *,
168 struct nfs4_sessionid *, u32);
169extern struct nfs_server *nfs_create_server(struct nfs_mount_info *,
170 struct nfs_subversion *);
171extern struct nfs_server *nfs4_create_server(
172 struct nfs_mount_info *,
173 struct nfs_subversion *);
174extern struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *,
175 struct nfs_fh *);
176extern void nfs_free_server(struct nfs_server *server);
177extern struct nfs_server *nfs_clone_server(struct nfs_server *,
178 struct nfs_fh *,
179 struct nfs_fattr *,
180 rpc_authflavor_t);
181extern int nfs_wait_client_init_complete(const struct nfs_client *clp);
182extern void nfs_mark_client_ready(struct nfs_client *clp, int state);
183extern struct nfs_client *nfs4_set_ds_client(struct nfs_client* mds_clp,
184 const struct sockaddr *ds_addr,
185 int ds_addrlen, int ds_proto,
186 unsigned int ds_timeo,
187 unsigned int ds_retrans);
188#ifdef CONFIG_PROC_FS
189extern int __init nfs_fs_proc_init(void);
190extern void nfs_fs_proc_exit(void);
191#else
192static inline int nfs_fs_proc_init(void)
193{
194 return 0;
195}
196static inline void nfs_fs_proc_exit(void)
197{
198}
199#endif
200
201#ifdef CONFIG_NFS_V4_1
202int nfs_sockaddr_match_ipaddr(const struct sockaddr *, const struct sockaddr *);
203#endif
204
205
206#if IS_ENABLED(CONFIG_NFS_V3)
207struct nfs_server *nfs3_create_server(struct nfs_mount_info *, struct nfs_subversion *);
208struct nfs_server *nfs3_clone_server(struct nfs_server *, struct nfs_fh *,
209 struct nfs_fattr *, rpc_authflavor_t);
210#endif
211
212
213extern struct svc_version nfs4_callback_version1;
214extern struct svc_version nfs4_callback_version4;
215
216struct nfs_pageio_descriptor;
217
218extern int __init nfs_init_nfspagecache(void);
219extern void nfs_destroy_nfspagecache(void);
220extern int __init nfs_init_readpagecache(void);
221extern void nfs_destroy_readpagecache(void);
222extern int __init nfs_init_writepagecache(void);
223extern void nfs_destroy_writepagecache(void);
224
225extern int __init nfs_init_directcache(void);
226extern void nfs_destroy_directcache(void);
227extern bool nfs_pgarray_set(struct nfs_page_array *p, unsigned int pagecount);
228extern void nfs_pgheader_init(struct nfs_pageio_descriptor *desc,
229 struct nfs_pgio_header *hdr,
230 void (*release)(struct nfs_pgio_header *hdr));
231void nfs_set_pgio_error(struct nfs_pgio_header *hdr, int error, loff_t pos);
232int nfs_iocounter_wait(struct nfs_io_counter *c);
233
234static inline void nfs_iocounter_init(struct nfs_io_counter *c)
235{
236 c->flags = 0;
237 atomic_set(&c->io_count, 0);
238}
239
240
241extern struct rpc_procinfo nfs_procedures[];
242extern int nfs2_decode_dirent(struct xdr_stream *,
243 struct nfs_entry *, int);
244
245
246extern struct rpc_procinfo nfs3_procedures[];
247extern int nfs3_decode_dirent(struct xdr_stream *,
248 struct nfs_entry *, int);
249
250
251#if IS_ENABLED(CONFIG_NFS_V4)
252extern int nfs4_decode_dirent(struct xdr_stream *,
253 struct nfs_entry *, int);
254#endif
255#ifdef CONFIG_NFS_V4_1
256extern const u32 nfs41_maxread_overhead;
257extern const u32 nfs41_maxwrite_overhead;
258extern const u32 nfs41_maxgetdevinfo_overhead;
259#endif
260
261
262#if IS_ENABLED(CONFIG_NFS_V4)
263extern struct rpc_procinfo nfs4_procedures[];
264#endif
265
266
267void nfs_close_context(struct nfs_open_context *ctx, int is_sync);
268extern struct nfs_client *nfs_init_client(struct nfs_client *clp,
269 const struct rpc_timeout *timeparms,
270 const char *ip_addr, rpc_authflavor_t authflavour);
271
272
273extern int nfs_access_cache_shrinker(struct shrinker *shrink,
274 struct shrink_control *sc);
275struct dentry *nfs_lookup(struct inode *, struct dentry *, unsigned int);
276int nfs_create(struct inode *, struct dentry *, umode_t, bool);
277int nfs_mkdir(struct inode *, struct dentry *, umode_t);
278int nfs_rmdir(struct inode *, struct dentry *);
279int nfs_unlink(struct inode *, struct dentry *);
280int nfs_symlink(struct inode *, struct dentry *, const char *);
281int nfs_link(struct dentry *, struct inode *, struct dentry *);
282int nfs_mknod(struct inode *, struct dentry *, umode_t, dev_t);
283int nfs_rename(struct inode *, struct dentry *, struct inode *, struct dentry *);
284
285
286int nfs_file_fsync_commit(struct file *, loff_t, loff_t, int);
287loff_t nfs_file_llseek(struct file *, loff_t, int);
288int nfs_file_flush(struct file *, fl_owner_t);
289ssize_t nfs_file_read(struct kiocb *, const struct iovec *, unsigned long, loff_t);
290ssize_t nfs_file_splice_read(struct file *, loff_t *, struct pipe_inode_info *,
291 size_t, unsigned int);
292int nfs_file_mmap(struct file *, struct vm_area_struct *);
293ssize_t nfs_file_write(struct kiocb *, const struct iovec *, unsigned long, loff_t);
294int nfs_file_release(struct inode *, struct file *);
295int nfs_lock(struct file *, int, struct file_lock *);
296int nfs_flock(struct file *, int, struct file_lock *);
297ssize_t nfs_file_splice_write(struct pipe_inode_info *, struct file *, loff_t *,
298 size_t, unsigned int);
299int nfs_check_flags(int);
300int nfs_setlease(struct file *, long, struct file_lock **);
301
302
303extern struct workqueue_struct *nfsiod_workqueue;
304extern struct inode *nfs_alloc_inode(struct super_block *sb);
305extern void nfs_destroy_inode(struct inode *);
306extern int nfs_write_inode(struct inode *, struct writeback_control *);
307extern int nfs_drop_inode(struct inode *);
308extern void nfs_clear_inode(struct inode *);
309extern void nfs_evict_inode(struct inode *);
310void nfs_zap_acl_cache(struct inode *inode);
311extern int nfs_wait_bit_killable(void *word);
312
313
314extern const struct super_operations nfs_sops;
315extern struct file_system_type nfs_fs_type;
316extern struct file_system_type nfs_xdev_fs_type;
317#if IS_ENABLED(CONFIG_NFS_V4)
318extern struct file_system_type nfs4_xdev_fs_type;
319extern struct file_system_type nfs4_referral_fs_type;
320#endif
321struct dentry *nfs_try_mount(int, const char *, struct nfs_mount_info *,
322 struct nfs_subversion *);
323void nfs_initialise_sb(struct super_block *);
324int nfs_set_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *);
325int nfs_clone_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *);
326struct dentry *nfs_fs_mount_common(struct nfs_server *, int, const char *,
327 struct nfs_mount_info *, struct nfs_subversion *);
328struct dentry *nfs_fs_mount(struct file_system_type *, int, const char *, void *);
329struct dentry * nfs_xdev_mount_common(struct file_system_type *, int,
330 const char *, struct nfs_mount_info *);
331void nfs_kill_super(struct super_block *);
332void nfs_fill_super(struct super_block *, struct nfs_mount_info *);
333
334extern struct rpc_stat nfs_rpcstat;
335
336extern int __init register_nfs_fs(void);
337extern void __exit unregister_nfs_fs(void);
338extern void nfs_sb_active(struct super_block *sb);
339extern void nfs_sb_deactive(struct super_block *sb);
340
341
342#define NFS_PATH_CANONICAL 1
343extern char *nfs_path(char **p, struct dentry *dentry,
344 char *buffer, ssize_t buflen, unsigned flags);
345extern struct vfsmount *nfs_d_automount(struct path *path);
346struct vfsmount *nfs_submount(struct nfs_server *, struct dentry *,
347 struct nfs_fh *, struct nfs_fattr *);
348struct vfsmount *nfs_do_submount(struct dentry *, struct nfs_fh *,
349 struct nfs_fattr *, rpc_authflavor_t);
350
351
352extern struct dentry *nfs_get_root(struct super_block *, struct nfs_fh *,
353 const char *);
354#if IS_ENABLED(CONFIG_NFS_V4)
355extern struct dentry *nfs4_get_root(struct super_block *, struct nfs_fh *,
356 const char *);
357
358extern int nfs4_get_rootfh(struct nfs_server *server, struct nfs_fh *mntfh);
359#endif
360
361struct nfs_pgio_completion_ops;
362
363extern struct nfs_read_header *nfs_readhdr_alloc(void);
364extern void nfs_readhdr_free(struct nfs_pgio_header *hdr);
365extern void nfs_pageio_init_read(struct nfs_pageio_descriptor *pgio,
366 struct inode *inode,
367 const struct nfs_pgio_completion_ops *compl_ops);
368extern int nfs_initiate_read(struct rpc_clnt *clnt,
369 struct nfs_read_data *data,
370 const struct rpc_call_ops *call_ops, int flags);
371extern void nfs_read_prepare(struct rpc_task *task, void *calldata);
372extern int nfs_generic_pagein(struct nfs_pageio_descriptor *desc,
373 struct nfs_pgio_header *hdr);
374extern void nfs_pageio_reset_read_mds(struct nfs_pageio_descriptor *pgio);
375extern void nfs_readdata_release(struct nfs_read_data *rdata);
376
377
378void nfs_clone_super(struct super_block *, struct nfs_mount_info *);
379void nfs_umount_begin(struct super_block *);
380int nfs_statfs(struct dentry *, struct kstatfs *);
381int nfs_show_options(struct seq_file *, struct dentry *);
382int nfs_show_devname(struct seq_file *, struct dentry *);
383int nfs_show_path(struct seq_file *, struct dentry *);
384int nfs_show_stats(struct seq_file *, struct dentry *);
385void nfs_put_super(struct super_block *);
386int nfs_remount(struct super_block *sb, int *flags, char *raw_data);
387
388
389extern void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio,
390 struct inode *inode, int ioflags,
391 const struct nfs_pgio_completion_ops *compl_ops);
392extern struct nfs_write_header *nfs_writehdr_alloc(void);
393extern void nfs_writehdr_free(struct nfs_pgio_header *hdr);
394extern int nfs_generic_flush(struct nfs_pageio_descriptor *desc,
395 struct nfs_pgio_header *hdr);
396extern void nfs_pageio_reset_write_mds(struct nfs_pageio_descriptor *pgio);
397extern void nfs_writedata_release(struct nfs_write_data *wdata);
398extern void nfs_commit_free(struct nfs_commit_data *p);
399extern int nfs_initiate_write(struct rpc_clnt *clnt,
400 struct nfs_write_data *data,
401 const struct rpc_call_ops *call_ops,
402 int how, int flags);
403extern void nfs_write_prepare(struct rpc_task *task, void *calldata);
404extern void nfs_commit_prepare(struct rpc_task *task, void *calldata);
405extern int nfs_initiate_commit(struct rpc_clnt *clnt,
406 struct nfs_commit_data *data,
407 const struct rpc_call_ops *call_ops,
408 int how, int flags);
409extern void nfs_init_commit(struct nfs_commit_data *data,
410 struct list_head *head,
411 struct pnfs_layout_segment *lseg,
412 struct nfs_commit_info *cinfo);
413int nfs_scan_commit_list(struct list_head *src, struct list_head *dst,
414 struct nfs_commit_info *cinfo, int max);
415int nfs_scan_commit(struct inode *inode, struct list_head *dst,
416 struct nfs_commit_info *cinfo);
417void nfs_mark_request_commit(struct nfs_page *req,
418 struct pnfs_layout_segment *lseg,
419 struct nfs_commit_info *cinfo);
420int nfs_generic_commit_list(struct inode *inode, struct list_head *head,
421 int how, struct nfs_commit_info *cinfo);
422void nfs_retry_commit(struct list_head *page_list,
423 struct pnfs_layout_segment *lseg,
424 struct nfs_commit_info *cinfo);
425void nfs_commitdata_release(struct nfs_commit_data *data);
426void nfs_request_add_commit_list(struct nfs_page *req, struct list_head *dst,
427 struct nfs_commit_info *cinfo);
428void nfs_request_remove_commit_list(struct nfs_page *req,
429 struct nfs_commit_info *cinfo);
430void nfs_init_cinfo(struct nfs_commit_info *cinfo,
431 struct inode *inode,
432 struct nfs_direct_req *dreq);
433
434#ifdef CONFIG_MIGRATION
435extern int nfs_migrate_page(struct address_space *,
436 struct page *, struct page *, enum migrate_mode);
437#else
438#define nfs_migrate_page NULL
439#endif
440
441
442void nfs_init_cinfo_from_dreq(struct nfs_commit_info *cinfo,
443 struct nfs_direct_req *dreq);
444static inline void nfs_inode_dio_wait(struct inode *inode)
445{
446 inode_dio_wait(inode);
447}
448extern ssize_t nfs_dreq_bytes_left(struct nfs_direct_req *dreq);
449
450
451extern void __nfs4_read_done_cb(struct nfs_read_data *);
452extern struct nfs_client *nfs4_init_client(struct nfs_client *clp,
453 const struct rpc_timeout *timeparms,
454 const char *ip_addr,
455 rpc_authflavor_t authflavour);
456extern int nfs40_walk_client_list(struct nfs_client *clp,
457 struct nfs_client **result,
458 struct rpc_cred *cred);
459extern int nfs41_walk_client_list(struct nfs_client *clp,
460 struct nfs_client **result,
461 struct rpc_cred *cred);
462
463
464
465
466static inline char *nfs_devname(struct dentry *dentry,
467 char *buffer, ssize_t buflen)
468{
469 char *dummy;
470 return nfs_path(&dummy, dentry, buffer, buflen, NFS_PATH_CANONICAL);
471}
472
473
474
475
476static inline
477unsigned long nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp)
478{
479
480 if ((bsize & (bsize - 1)) || nrbitsp) {
481 unsigned char nrbits;
482
483 for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--)
484 ;
485 bsize = 1 << nrbits;
486 if (nrbitsp)
487 *nrbitsp = nrbits;
488 }
489
490 return bsize;
491}
492
493
494
495
496static inline blkcnt_t nfs_calc_block_size(u64 tsize)
497{
498 blkcnt_t used = (tsize + 511) >> 9;
499 return (used > ULONG_MAX) ? ULONG_MAX : used;
500}
501
502
503
504
505static inline
506unsigned long nfs_block_size(unsigned long bsize, unsigned char *nrbitsp)
507{
508 if (bsize < NFS_MIN_FILE_IO_SIZE)
509 bsize = NFS_DEF_FILE_IO_SIZE;
510 else if (bsize >= NFS_MAX_FILE_IO_SIZE)
511 bsize = NFS_MAX_FILE_IO_SIZE;
512
513 return nfs_block_bits(bsize, nrbitsp);
514}
515
516
517
518
519static inline
520void nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize)
521{
522 sb->s_maxbytes = (loff_t)maxfilesize;
523 if (sb->s_maxbytes > MAX_LFS_FILESIZE || sb->s_maxbytes <= 0)
524 sb->s_maxbytes = MAX_LFS_FILESIZE;
525}
526
527
528
529
530static inline
531unsigned int nfs_page_length(struct page *page)
532{
533 loff_t i_size = i_size_read(page_file_mapping(page)->host);
534
535 if (i_size > 0) {
536 pgoff_t page_index = page_file_index(page);
537 pgoff_t end_index = (i_size - 1) >> PAGE_CACHE_SHIFT;
538 if (page_index < end_index)
539 return PAGE_CACHE_SIZE;
540 if (page_index == end_index)
541 return ((i_size - 1) & ~PAGE_CACHE_MASK) + 1;
542 }
543 return 0;
544}
545
546
547
548
549static inline
550unsigned char nfs_umode_to_dtype(umode_t mode)
551{
552 return (mode >> 12) & 15;
553}
554
555
556
557
558
559static inline
560unsigned int nfs_page_array_len(unsigned int base, size_t len)
561{
562 return ((unsigned long)len + (unsigned long)base +
563 PAGE_SIZE - 1) >> PAGE_SHIFT;
564}
565
566
567
568
569
570
571
572
573static inline
574u64 nfs_timespec_to_change_attr(const struct timespec *ts)
575{
576 return ((u64)ts->tv_sec << 30) + ts->tv_nsec;
577}
578
