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 *);
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);
232
233
234extern struct rpc_procinfo nfs_procedures[];
235extern int nfs2_decode_dirent(struct xdr_stream *,
236 struct nfs_entry *, int);
237
238
239extern struct rpc_procinfo nfs3_procedures[];
240extern int nfs3_decode_dirent(struct xdr_stream *,
241 struct nfs_entry *, int);
242
243
244#if IS_ENABLED(CONFIG_NFS_V4)
245extern int nfs4_decode_dirent(struct xdr_stream *,
246 struct nfs_entry *, int);
247#endif
248#ifdef CONFIG_NFS_V4_1
249extern const u32 nfs41_maxread_overhead;
250extern const u32 nfs41_maxwrite_overhead;
251#endif
252
253
254#if IS_ENABLED(CONFIG_NFS_V4)
255extern struct rpc_procinfo nfs4_procedures[];
256#endif
257
258
259void nfs_close_context(struct nfs_open_context *ctx, int is_sync);
260extern struct nfs_client *nfs_init_client(struct nfs_client *clp,
261 const struct rpc_timeout *timeparms,
262 const char *ip_addr, rpc_authflavor_t authflavour);
263
264
265extern int nfs_access_cache_shrinker(struct shrinker *shrink,
266 struct shrink_control *sc);
267struct dentry *nfs_lookup(struct inode *, struct dentry *, unsigned int);
268int nfs_create(struct inode *, struct dentry *, umode_t, bool);
269int nfs_mkdir(struct inode *, struct dentry *, umode_t);
270int nfs_rmdir(struct inode *, struct dentry *);
271int nfs_unlink(struct inode *, struct dentry *);
272int nfs_symlink(struct inode *, struct dentry *, const char *);
273int nfs_link(struct dentry *, struct inode *, struct dentry *);
274int nfs_mknod(struct inode *, struct dentry *, umode_t, dev_t);
275int nfs_rename(struct inode *, struct dentry *, struct inode *, struct dentry *);
276
277
278int nfs_file_fsync_commit(struct file *, loff_t, loff_t, int);
279loff_t nfs_file_llseek(struct file *, loff_t, int);
280int nfs_file_flush(struct file *, fl_owner_t);
281ssize_t nfs_file_read(struct kiocb *, const struct iovec *, unsigned long, loff_t);
282ssize_t nfs_file_splice_read(struct file *, loff_t *, struct pipe_inode_info *,
283 size_t, unsigned int);
284int nfs_file_mmap(struct file *, struct vm_area_struct *);
285ssize_t nfs_file_write(struct kiocb *, const struct iovec *, unsigned long, loff_t);
286int nfs_file_release(struct inode *, struct file *);
287int nfs_lock(struct file *, int, struct file_lock *);
288int nfs_flock(struct file *, int, struct file_lock *);
289ssize_t nfs_file_splice_write(struct pipe_inode_info *, struct file *, loff_t *,
290 size_t, unsigned int);
291int nfs_check_flags(int);
292int nfs_setlease(struct file *, long, struct file_lock **);
293
294
295extern struct workqueue_struct *nfsiod_workqueue;
296extern struct inode *nfs_alloc_inode(struct super_block *sb);
297extern void nfs_destroy_inode(struct inode *);
298extern int nfs_write_inode(struct inode *, struct writeback_control *);
299extern int nfs_drop_inode(struct inode *);
300extern void nfs_clear_inode(struct inode *);
301extern void nfs_evict_inode(struct inode *);
302void nfs_zap_acl_cache(struct inode *inode);
303extern int nfs_wait_bit_killable(void *word);
304
305
306extern const struct super_operations nfs_sops;
307extern struct file_system_type nfs_fs_type;
308extern struct file_system_type nfs_xdev_fs_type;
309#if IS_ENABLED(CONFIG_NFS_V4)
310extern struct file_system_type nfs4_xdev_fs_type;
311extern struct file_system_type nfs4_referral_fs_type;
312#endif
313struct dentry *nfs_try_mount(int, const char *, struct nfs_mount_info *,
314 struct nfs_subversion *);
315void nfs_initialise_sb(struct super_block *);
316int nfs_set_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *);
317int nfs_clone_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *);
318struct dentry *nfs_fs_mount_common(struct nfs_server *, int, const char *,
319 struct nfs_mount_info *, struct nfs_subversion *);
320struct dentry *nfs_fs_mount(struct file_system_type *, int, const char *, void *);
321struct dentry * nfs_xdev_mount_common(struct file_system_type *, int,
322 const char *, struct nfs_mount_info *);
323void nfs_kill_super(struct super_block *);
324void nfs_fill_super(struct super_block *, struct nfs_mount_info *);
325
326extern struct rpc_stat nfs_rpcstat;
327
328extern int __init register_nfs_fs(void);
329extern void __exit unregister_nfs_fs(void);
330extern void nfs_sb_active(struct super_block *sb);
331extern void nfs_sb_deactive(struct super_block *sb);
332
333
334#define NFS_PATH_CANONICAL 1
335extern char *nfs_path(char **p, struct dentry *dentry,
336 char *buffer, ssize_t buflen, unsigned flags);
337extern struct vfsmount *nfs_d_automount(struct path *path);
338struct vfsmount *nfs_submount(struct nfs_server *, struct dentry *,
339 struct nfs_fh *, struct nfs_fattr *);
340struct vfsmount *nfs_do_submount(struct dentry *, struct nfs_fh *,
341 struct nfs_fattr *, rpc_authflavor_t);
342
343
344extern struct dentry *nfs_get_root(struct super_block *, struct nfs_fh *,
345 const char *);
346#if IS_ENABLED(CONFIG_NFS_V4)
347extern struct dentry *nfs4_get_root(struct super_block *, struct nfs_fh *,
348 const char *);
349
350extern int nfs4_get_rootfh(struct nfs_server *server, struct nfs_fh *mntfh);
351#endif
352
353struct nfs_pgio_completion_ops;
354
355extern struct nfs_read_header *nfs_readhdr_alloc(void);
356extern void nfs_readhdr_free(struct nfs_pgio_header *hdr);
357extern void nfs_pageio_init_read(struct nfs_pageio_descriptor *pgio,
358 struct inode *inode,
359 const struct nfs_pgio_completion_ops *compl_ops);
360extern int nfs_initiate_read(struct rpc_clnt *clnt,
361 struct nfs_read_data *data,
362 const struct rpc_call_ops *call_ops, int flags);
363extern void nfs_read_prepare(struct rpc_task *task, void *calldata);
364extern int nfs_generic_pagein(struct nfs_pageio_descriptor *desc,
365 struct nfs_pgio_header *hdr);
366extern void nfs_pageio_reset_read_mds(struct nfs_pageio_descriptor *pgio);
367extern void nfs_readdata_release(struct nfs_read_data *rdata);
368
369
370void nfs_clone_super(struct super_block *, struct nfs_mount_info *);
371void nfs_umount_begin(struct super_block *);
372int nfs_statfs(struct dentry *, struct kstatfs *);
373int nfs_show_options(struct seq_file *, struct dentry *);
374int nfs_show_devname(struct seq_file *, struct dentry *);
375int nfs_show_path(struct seq_file *, struct dentry *);
376int nfs_show_stats(struct seq_file *, struct dentry *);
377void nfs_put_super(struct super_block *);
378int nfs_remount(struct super_block *sb, int *flags, char *raw_data);
379
380
381extern void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio,
382 struct inode *inode, int ioflags,
383 const struct nfs_pgio_completion_ops *compl_ops);
384extern struct nfs_write_header *nfs_writehdr_alloc(void);
385extern void nfs_writehdr_free(struct nfs_pgio_header *hdr);
386extern int nfs_generic_flush(struct nfs_pageio_descriptor *desc,
387 struct nfs_pgio_header *hdr);
388extern void nfs_pageio_reset_write_mds(struct nfs_pageio_descriptor *pgio);
389extern void nfs_writedata_release(struct nfs_write_data *wdata);
390extern void nfs_commit_free(struct nfs_commit_data *p);
391extern int nfs_initiate_write(struct rpc_clnt *clnt,
392 struct nfs_write_data *data,
393 const struct rpc_call_ops *call_ops,
394 int how, int flags);
395extern void nfs_write_prepare(struct rpc_task *task, void *calldata);
396extern void nfs_commit_prepare(struct rpc_task *task, void *calldata);
397extern int nfs_initiate_commit(struct rpc_clnt *clnt,
398 struct nfs_commit_data *data,
399 const struct rpc_call_ops *call_ops,
400 int how, int flags);
401extern void nfs_init_commit(struct nfs_commit_data *data,
402 struct list_head *head,
403 struct pnfs_layout_segment *lseg,
404 struct nfs_commit_info *cinfo);
405int nfs_scan_commit_list(struct list_head *src, struct list_head *dst,
406 struct nfs_commit_info *cinfo, int max);
407int nfs_scan_commit(struct inode *inode, struct list_head *dst,
408 struct nfs_commit_info *cinfo);
409void nfs_mark_request_commit(struct nfs_page *req,
410 struct pnfs_layout_segment *lseg,
411 struct nfs_commit_info *cinfo);
412int nfs_generic_commit_list(struct inode *inode, struct list_head *head,
413 int how, struct nfs_commit_info *cinfo);
414void nfs_retry_commit(struct list_head *page_list,
415 struct pnfs_layout_segment *lseg,
416 struct nfs_commit_info *cinfo);
417void nfs_commitdata_release(struct nfs_commit_data *data);
418void nfs_request_add_commit_list(struct nfs_page *req, struct list_head *dst,
419 struct nfs_commit_info *cinfo);
420void nfs_request_remove_commit_list(struct nfs_page *req,
421 struct nfs_commit_info *cinfo);
422void nfs_init_cinfo(struct nfs_commit_info *cinfo,
423 struct inode *inode,
424 struct nfs_direct_req *dreq);
425
426#ifdef CONFIG_MIGRATION
427extern int nfs_migrate_page(struct address_space *,
428 struct page *, struct page *, enum migrate_mode);
429#else
430#define nfs_migrate_page NULL
431#endif
432
433
434void nfs_init_cinfo_from_dreq(struct nfs_commit_info *cinfo,
435 struct nfs_direct_req *dreq);
436static inline void nfs_inode_dio_wait(struct inode *inode)
437{
438 inode_dio_wait(inode);
439}
440extern ssize_t nfs_dreq_bytes_left(struct nfs_direct_req *dreq);
441
442
443extern void __nfs4_read_done_cb(struct nfs_read_data *);
444extern struct nfs_client *nfs4_init_client(struct nfs_client *clp,
445 const struct rpc_timeout *timeparms,
446 const char *ip_addr,
447 rpc_authflavor_t authflavour);
448extern int nfs40_walk_client_list(struct nfs_client *clp,
449 struct nfs_client **result,
450 struct rpc_cred *cred);
451extern int nfs41_walk_client_list(struct nfs_client *clp,
452 struct nfs_client **result,
453 struct rpc_cred *cred);
454
455
456
457
458static inline char *nfs_devname(struct dentry *dentry,
459 char *buffer, ssize_t buflen)
460{
461 char *dummy;
462 return nfs_path(&dummy, dentry, buffer, buflen, NFS_PATH_CANONICAL);
463}
464
465
466
467
468static inline
469unsigned long nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp)
470{
471
472 if ((bsize & (bsize - 1)) || nrbitsp) {
473 unsigned char nrbits;
474
475 for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--)
476 ;
477 bsize = 1 << nrbits;
478 if (nrbitsp)
479 *nrbitsp = nrbits;
480 }
481
482 return bsize;
483}
484
485
486
487
488static inline blkcnt_t nfs_calc_block_size(u64 tsize)
489{
490 blkcnt_t used = (tsize + 511) >> 9;
491 return (used > ULONG_MAX) ? ULONG_MAX : used;
492}
493
494
495
496
497static inline
498unsigned long nfs_block_size(unsigned long bsize, unsigned char *nrbitsp)
499{
500 if (bsize < NFS_MIN_FILE_IO_SIZE)
501 bsize = NFS_DEF_FILE_IO_SIZE;
502 else if (bsize >= NFS_MAX_FILE_IO_SIZE)
503 bsize = NFS_MAX_FILE_IO_SIZE;
504
505 return nfs_block_bits(bsize, nrbitsp);
506}
507
508
509
510
511static inline
512void nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize)
513{
514 sb->s_maxbytes = (loff_t)maxfilesize;
515 if (sb->s_maxbytes > MAX_LFS_FILESIZE || sb->s_maxbytes <= 0)
516 sb->s_maxbytes = MAX_LFS_FILESIZE;
517}
518
519
520
521
522static inline
523unsigned int nfs_page_length(struct page *page)
524{
525 loff_t i_size = i_size_read(page_file_mapping(page)->host);
526
527 if (i_size > 0) {
528 pgoff_t page_index = page_file_index(page);
529 pgoff_t end_index = (i_size - 1) >> PAGE_CACHE_SHIFT;
530 if (page_index < end_index)
531 return PAGE_CACHE_SIZE;
532 if (page_index == end_index)
533 return ((i_size - 1) & ~PAGE_CACHE_MASK) + 1;
534 }
535 return 0;
536}
537
538
539
540
541static inline
542unsigned char nfs_umode_to_dtype(umode_t mode)
543{
544 return (mode >> 12) & 15;
545}
546
547
548
549
550
551static inline
552unsigned int nfs_page_array_len(unsigned int base, size_t len)
553{
554 return ((unsigned long)len + (unsigned long)base +
555 PAGE_SIZE - 1) >> PAGE_SHIFT;
556}
557
558
559
560
561
562
563
564
565static inline
566u64 nfs_timespec_to_change_attr(const struct timespec *ts)
567{
568 return ((u64)ts->tv_sec << 30) + ts->tv_nsec;
569}
570
