1
2
3
4
5#include "nfs4_fs.h"
6#include <linux/mount.h>
7#include <linux/security.h>
8#include <linux/crc32.h>
9
10#define NFS_MS_MASK (MS_RDONLY|MS_NOSUID|MS_NODEV|MS_NOEXEC|MS_SYNCHRONOUS)
11
12struct nfs_string;
13
14
15
16
17
18
19
20#define NFS_MAX_READAHEAD (RPC_DEF_SLOT_TABLE - 1)
21
22static inline void nfs_attr_check_mountpoint(struct super_block *parent, struct nfs_fattr *fattr)
23{
24 if (!nfs_fsid_equal(&NFS_SB(parent)->fsid, &fattr->fsid))
25 fattr->valid |= NFS_ATTR_FATTR_MOUNTPOINT;
26}
27
28static inline int nfs_attr_use_mounted_on_fileid(struct nfs_fattr *fattr)
29{
30 if (((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) == 0) ||
31 (((fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT) == 0) &&
32 ((fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) == 0)))
33 return 0;
34
35 fattr->fileid = fattr->mounted_on_fileid;
36 return 1;
37}
38
39struct nfs_clone_mount {
40 const struct super_block *sb;
41 const struct dentry *dentry;
42 struct nfs_fh *fh;
43 struct nfs_fattr *fattr;
44 char *hostname;
45 char *mnt_path;
46 struct sockaddr *addr;
47 size_t addrlen;
48 rpc_authflavor_t authflavor;
49};
50
51
52
53
54
55#define NFS_MAX_SECFLAVORS (12)
56
57
58
59
60#define NFS_UNSPEC_PORT (-1)
61
62
63
64
65
66#define NFS_MAX_READDIR_PAGES 8
67
68struct nfs_client_initdata {
69 unsigned long init_flags;
70 const char *hostname;
71 const struct sockaddr *addr;
72 size_t addrlen;
73 struct nfs_subversion *nfs_mod;
74 int proto;
75 u32 minorversion;
76 struct net *net;
77};
78
79
80
81
82struct nfs_parsed_mount_data {
83 int flags;
84 unsigned int rsize, wsize;
85 unsigned int timeo, retrans;
86 unsigned int acregmin, acregmax,
87 acdirmin, acdirmax;
88 unsigned int namlen;
89 unsigned int options;
90 unsigned int bsize;
91 unsigned int auth_flavor_len;
92 rpc_authflavor_t auth_flavors[1];
93 char *client_address;
94 unsigned int version;
95 unsigned int minorversion;
96 char *fscache_uniq;
97 bool need_mount;
98
99 struct {
100 struct sockaddr_storage address;
101 size_t addrlen;
102 char *hostname;
103 u32 version;
104 int port;
105 unsigned short protocol;
106 } mount_server;
107
108 struct {
109 struct sockaddr_storage address;
110 size_t addrlen;
111 char *hostname;
112 char *export_path;
113 int port;
114 unsigned short protocol;
115 } nfs_server;
116
117 struct security_mnt_opts lsm_opts;
118 struct net *net;
119};
120
121
122struct nfs_mount_request {
123 struct sockaddr *sap;
124 size_t salen;
125 char *hostname;
126 char *dirpath;
127 u32 version;
128 unsigned short protocol;
129 struct nfs_fh *fh;
130 int noresvport;
131 unsigned int *auth_flav_len;
132 rpc_authflavor_t *auth_flavs;
133 struct net *net;
134};
135
136struct nfs_mount_info {
137 void (*fill_super)(struct super_block *, struct nfs_mount_info *);
138 int (*set_security)(struct super_block *, struct dentry *, struct nfs_mount_info *);
139 struct nfs_parsed_mount_data *parsed;
140 struct nfs_clone_mount *cloned;
141 struct nfs_fh *mntfh;
142};
143
144extern int nfs_mount(struct nfs_mount_request *info);
145extern void nfs_umount(const struct nfs_mount_request *info);
146
147
148extern const struct rpc_program nfs_program;
149extern void nfs_clients_init(struct net *net);
150extern struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *);
151int nfs_create_rpc_client(struct nfs_client *, const struct rpc_timeout *, rpc_authflavor_t);
152struct nfs_client *nfs_get_client(const struct nfs_client_initdata *,
153 const struct rpc_timeout *, const char *,
154 rpc_authflavor_t);
155int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *, struct nfs_fattr *);
156void nfs_server_insert_lists(struct nfs_server *);
157void nfs_init_timeout_values(struct rpc_timeout *, int, unsigned int, unsigned int);
158int nfs_init_server_rpcclient(struct nfs_server *, const struct rpc_timeout *t,
159 rpc_authflavor_t);
160struct nfs_server *nfs_alloc_server(void);
161void nfs_server_copy_userdata(struct nfs_server *, struct nfs_server *);
162
163extern void nfs_cleanup_cb_ident_idr(struct net *);
164extern void nfs_put_client(struct nfs_client *);
165extern void nfs_free_client(struct nfs_client *);
166extern struct nfs_client *nfs4_find_client_ident(struct net *, int);
167extern struct nfs_client *
168nfs4_find_client_sessionid(struct net *, const struct sockaddr *,
169 struct nfs4_sessionid *, u32);
170extern struct nfs_server *nfs_create_server(struct nfs_mount_info *,
171 struct nfs_subversion *);
172extern struct nfs_server *nfs4_create_server(
173 struct nfs_mount_info *,
174 struct nfs_subversion *);
175extern struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *,
176 struct nfs_fh *);
177extern void nfs_free_server(struct nfs_server *server);
178extern struct nfs_server *nfs_clone_server(struct nfs_server *,
179 struct nfs_fh *,
180 struct nfs_fattr *,
181 rpc_authflavor_t);
182extern int nfs_wait_client_init_complete(const struct nfs_client *clp);
183extern void nfs_mark_client_ready(struct nfs_client *clp, int state);
184extern struct nfs_client *nfs4_set_ds_client(struct nfs_client* mds_clp,
185 const struct sockaddr *ds_addr,
186 int ds_addrlen, int ds_proto,
187 unsigned int ds_timeo,
188 unsigned int ds_retrans);
189extern struct rpc_clnt *nfs4_find_or_create_ds_client(struct nfs_client *,
190 struct inode *);
191#ifdef CONFIG_PROC_FS
192extern int __init nfs_fs_proc_init(void);
193extern void nfs_fs_proc_exit(void);
194#else
195static inline int nfs_fs_proc_init(void)
196{
197 return 0;
198}
199static inline void nfs_fs_proc_exit(void)
200{
201}
202#endif
203
204#ifdef CONFIG_NFS_V4_1
205int nfs_sockaddr_match_ipaddr(const struct sockaddr *, const struct sockaddr *);
206#endif
207
208
209#if IS_ENABLED(CONFIG_NFS_V3)
210struct nfs_server *nfs3_create_server(struct nfs_mount_info *, struct nfs_subversion *);
211struct nfs_server *nfs3_clone_server(struct nfs_server *, struct nfs_fh *,
212 struct nfs_fattr *, rpc_authflavor_t);
213#endif
214
215
216extern struct svc_version nfs4_callback_version1;
217extern struct svc_version nfs4_callback_version4;
218
219struct nfs_pageio_descriptor;
220
221extern int __init nfs_init_nfspagecache(void);
222extern void nfs_destroy_nfspagecache(void);
223extern int __init nfs_init_readpagecache(void);
224extern void nfs_destroy_readpagecache(void);
225extern int __init nfs_init_writepagecache(void);
226extern void nfs_destroy_writepagecache(void);
227
228extern int __init nfs_init_directcache(void);
229extern void nfs_destroy_directcache(void);
230extern bool nfs_pgarray_set(struct nfs_page_array *p, unsigned int pagecount);
231extern void nfs_pgheader_init(struct nfs_pageio_descriptor *desc,
232 struct nfs_pgio_header *hdr,
233 void (*release)(struct nfs_pgio_header *hdr));
234void nfs_set_pgio_error(struct nfs_pgio_header *hdr, int error, loff_t pos);
235int nfs_iocounter_wait(struct nfs_io_counter *c);
236
237static inline void nfs_iocounter_init(struct nfs_io_counter *c)
238{
239 c->flags = 0;
240 atomic_set(&c->io_count, 0);
241}
242
243
244extern struct rpc_procinfo nfs_procedures[];
245extern int nfs2_decode_dirent(struct xdr_stream *,
246 struct nfs_entry *, int);
247
248
249extern struct rpc_procinfo nfs3_procedures[];
250extern int nfs3_decode_dirent(struct xdr_stream *,
251 struct nfs_entry *, int);
252
253
254#if IS_ENABLED(CONFIG_NFS_V4)
255extern int nfs4_decode_dirent(struct xdr_stream *,
256 struct nfs_entry *, int);
257#endif
258#ifdef CONFIG_NFS_V4_1
259extern const u32 nfs41_maxread_overhead;
260extern const u32 nfs41_maxwrite_overhead;
261extern const u32 nfs41_maxgetdevinfo_overhead;
262#endif
263
264
265#if IS_ENABLED(CONFIG_NFS_V4)
266extern struct rpc_procinfo nfs4_procedures[];
267#endif
268
269
270void nfs_close_context(struct nfs_open_context *ctx, int is_sync);
271extern struct nfs_client *nfs_init_client(struct nfs_client *clp,
272 const struct rpc_timeout *timeparms,
273 const char *ip_addr);
274
275
276extern unsigned long nfs_access_cache_count(struct shrinker *shrink,
277 struct shrink_control *sc);
278extern unsigned long nfs_access_cache_scan(struct shrinker *shrink,
279 struct shrink_control *sc);
280struct dentry *nfs_lookup(struct inode *, struct dentry *, unsigned int);
281int nfs_create(struct inode *, struct dentry *, umode_t, bool);
282int nfs_mkdir(struct inode *, struct dentry *, umode_t);
283int nfs_rmdir(struct inode *, struct dentry *);
284int nfs_unlink(struct inode *, struct dentry *);
285int nfs_symlink(struct inode *, struct dentry *, const char *);
286int nfs_link(struct dentry *, struct inode *, struct dentry *);
287int nfs_mknod(struct inode *, struct dentry *, umode_t, dev_t);
288int nfs_rename(struct inode *, struct dentry *, struct inode *, struct dentry *);
289
290
291int nfs_file_fsync_commit(struct file *, loff_t, loff_t, int);
292loff_t nfs_file_llseek(struct file *, loff_t, int);
293int nfs_file_flush(struct file *, fl_owner_t);
294ssize_t nfs_file_read(struct kiocb *, const struct iovec *, unsigned long, loff_t);
295ssize_t nfs_file_splice_read(struct file *, loff_t *, struct pipe_inode_info *,
296 size_t, unsigned int);
297int nfs_file_mmap(struct file *, struct vm_area_struct *);
298ssize_t nfs_file_write(struct kiocb *, const struct iovec *, unsigned long, loff_t);
299int nfs_file_release(struct inode *, struct file *);
300int nfs_lock(struct file *, int, struct file_lock *);
301int nfs_flock(struct file *, int, struct file_lock *);
302ssize_t nfs_file_splice_write(struct pipe_inode_info *, struct file *, loff_t *,
303 size_t, unsigned int);
304int nfs_check_flags(int);
305int nfs_setlease(struct file *, long, struct file_lock **);
306
307
308extern struct workqueue_struct *nfsiod_workqueue;
309extern struct inode *nfs_alloc_inode(struct super_block *sb);
310extern void nfs_destroy_inode(struct inode *);
311extern int nfs_write_inode(struct inode *, struct writeback_control *);
312extern int nfs_drop_inode(struct inode *);
313extern void nfs_clear_inode(struct inode *);
314extern void nfs_evict_inode(struct inode *);
315void nfs_zap_acl_cache(struct inode *inode);
316extern int nfs_wait_bit_killable(void *word);
317
318
319extern const struct super_operations nfs_sops;
320extern struct file_system_type nfs_fs_type;
321extern struct file_system_type nfs_xdev_fs_type;
322#if IS_ENABLED(CONFIG_NFS_V4)
323extern struct file_system_type nfs4_xdev_fs_type;
324extern struct file_system_type nfs4_referral_fs_type;
325#endif
326struct dentry *nfs_try_mount(int, const char *, struct nfs_mount_info *,
327 struct nfs_subversion *);
328void nfs_initialise_sb(struct super_block *);
329int nfs_set_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *);
330int nfs_clone_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *);
331struct dentry *nfs_fs_mount_common(struct nfs_server *, int, const char *,
332 struct nfs_mount_info *, struct nfs_subversion *);
333struct dentry *nfs_fs_mount(struct file_system_type *, int, const char *, void *);
334struct dentry * nfs_xdev_mount_common(struct file_system_type *, int,
335 const char *, struct nfs_mount_info *);
336void nfs_kill_super(struct super_block *);
337void nfs_fill_super(struct super_block *, struct nfs_mount_info *);
338
339extern struct rpc_stat nfs_rpcstat;
340
341extern int __init register_nfs_fs(void);
342extern void __exit unregister_nfs_fs(void);
343extern void nfs_sb_active(struct super_block *sb);
344extern void nfs_sb_deactive(struct super_block *sb);
345
346
347#define NFS_PATH_CANONICAL 1
348extern char *nfs_path(char **p, struct dentry *dentry,
349 char *buffer, ssize_t buflen, unsigned flags);
350extern struct vfsmount *nfs_d_automount(struct path *path);
351struct vfsmount *nfs_submount(struct nfs_server *, struct dentry *,
352 struct nfs_fh *, struct nfs_fattr *);
353struct vfsmount *nfs_do_submount(struct dentry *, struct nfs_fh *,
354 struct nfs_fattr *, rpc_authflavor_t);
355
356
357extern struct dentry *nfs_get_root(struct super_block *, struct nfs_fh *,
358 const char *);
359#if IS_ENABLED(CONFIG_NFS_V4)
360extern struct dentry *nfs4_get_root(struct super_block *, struct nfs_fh *,
361 const char *);
362
363extern int nfs4_get_rootfh(struct nfs_server *server, struct nfs_fh *mntfh, bool);
364#endif
365
366struct nfs_pgio_completion_ops;
367
368extern struct nfs_read_header *nfs_readhdr_alloc(void);
369extern void nfs_readhdr_free(struct nfs_pgio_header *hdr);
370extern void nfs_pageio_init_read(struct nfs_pageio_descriptor *pgio,
371 struct inode *inode,
372 const struct nfs_pgio_completion_ops *compl_ops);
373extern int nfs_initiate_read(struct rpc_clnt *clnt,
374 struct nfs_read_data *data,
375 const struct rpc_call_ops *call_ops, int flags);
376extern void nfs_read_prepare(struct rpc_task *task, void *calldata);
377extern int nfs_generic_pagein(struct nfs_pageio_descriptor *desc,
378 struct nfs_pgio_header *hdr);
379extern void nfs_pageio_reset_read_mds(struct nfs_pageio_descriptor *pgio);
380extern void nfs_readdata_release(struct nfs_read_data *rdata);
381
382
383void nfs_clone_super(struct super_block *, struct nfs_mount_info *);
384void nfs_umount_begin(struct super_block *);
385int nfs_statfs(struct dentry *, struct kstatfs *);
386int nfs_show_options(struct seq_file *, struct dentry *);
387int nfs_show_devname(struct seq_file *, struct dentry *);
388int nfs_show_path(struct seq_file *, struct dentry *);
389int nfs_show_stats(struct seq_file *, struct dentry *);
390void nfs_put_super(struct super_block *);
391int nfs_remount(struct super_block *sb, int *flags, char *raw_data);
392
393
394extern void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio,
395 struct inode *inode, int ioflags,
396 const struct nfs_pgio_completion_ops *compl_ops);
397extern struct nfs_write_header *nfs_writehdr_alloc(void);
398extern void nfs_writehdr_free(struct nfs_pgio_header *hdr);
399extern int nfs_generic_flush(struct nfs_pageio_descriptor *desc,
400 struct nfs_pgio_header *hdr);
401extern void nfs_pageio_reset_write_mds(struct nfs_pageio_descriptor *pgio);
402extern void nfs_writedata_release(struct nfs_write_data *wdata);
403extern void nfs_commit_free(struct nfs_commit_data *p);
404extern int nfs_initiate_write(struct rpc_clnt *clnt,
405 struct nfs_write_data *data,
406 const struct rpc_call_ops *call_ops,
407 int how, int flags);
408extern void nfs_write_prepare(struct rpc_task *task, void *calldata);
409extern void nfs_commit_prepare(struct rpc_task *task, void *calldata);
410extern int nfs_initiate_commit(struct rpc_clnt *clnt,
411 struct nfs_commit_data *data,
412 const struct rpc_call_ops *call_ops,
413 int how, int flags);
414extern void nfs_init_commit(struct nfs_commit_data *data,
415 struct list_head *head,
416 struct pnfs_layout_segment *lseg,
417 struct nfs_commit_info *cinfo);
418int nfs_scan_commit_list(struct list_head *src, struct list_head *dst,
419 struct nfs_commit_info *cinfo, int max);
420int nfs_scan_commit(struct inode *inode, struct list_head *dst,
421 struct nfs_commit_info *cinfo);
422void nfs_mark_request_commit(struct nfs_page *req,
423 struct pnfs_layout_segment *lseg,
424 struct nfs_commit_info *cinfo);
425int nfs_generic_commit_list(struct inode *inode, struct list_head *head,
426 int how, struct nfs_commit_info *cinfo);
427void nfs_retry_commit(struct list_head *page_list,
428 struct pnfs_layout_segment *lseg,
429 struct nfs_commit_info *cinfo);
430void nfs_commitdata_release(struct nfs_commit_data *data);
431void nfs_request_add_commit_list(struct nfs_page *req, struct list_head *dst,
432 struct nfs_commit_info *cinfo);
433void nfs_request_remove_commit_list(struct nfs_page *req,
434 struct nfs_commit_info *cinfo);
435void nfs_init_cinfo(struct nfs_commit_info *cinfo,
436 struct inode *inode,
437 struct nfs_direct_req *dreq);
438int nfs_key_timeout_notify(struct file *filp, struct inode *inode);
439bool nfs_ctx_key_to_expire(struct nfs_open_context *ctx);
440
441#ifdef CONFIG_MIGRATION
442extern int nfs_migrate_page(struct address_space *,
443 struct page *, struct page *, enum migrate_mode);
444#else
445#define nfs_migrate_page NULL
446#endif
447
448
449void nfs_init_cinfo_from_dreq(struct nfs_commit_info *cinfo,
450 struct nfs_direct_req *dreq);
451static inline void nfs_inode_dio_wait(struct inode *inode)
452{
453 inode_dio_wait(inode);
454}
455extern ssize_t nfs_dreq_bytes_left(struct nfs_direct_req *dreq);
456
457
458extern void __nfs4_read_done_cb(struct nfs_read_data *);
459extern struct nfs_client *nfs4_init_client(struct nfs_client *clp,
460 const struct rpc_timeout *timeparms,
461 const char *ip_addr);
462extern int nfs40_walk_client_list(struct nfs_client *clp,
463 struct nfs_client **result,
464 struct rpc_cred *cred);
465extern int nfs41_walk_client_list(struct nfs_client *clp,
466 struct nfs_client **result,
467 struct rpc_cred *cred);
468
469
470
471
472static inline char *nfs_devname(struct dentry *dentry,
473 char *buffer, ssize_t buflen)
474{
475 char *dummy;
476 return nfs_path(&dummy, dentry, buffer, buflen, NFS_PATH_CANONICAL);
477}
478
479
480
481
482static inline
483unsigned long nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp)
484{
485
486 if ((bsize & (bsize - 1)) || nrbitsp) {
487 unsigned char nrbits;
488
489 for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--)
490 ;
491 bsize = 1 << nrbits;
492 if (nrbitsp)
493 *nrbitsp = nrbits;
494 }
495
496 return bsize;
497}
498
499
500
501
502static inline blkcnt_t nfs_calc_block_size(u64 tsize)
503{
504 blkcnt_t used = (tsize + 511) >> 9;
505 return (used > ULONG_MAX) ? ULONG_MAX : used;
506}
507
508
509
510
511static inline
512unsigned long nfs_block_size(unsigned long bsize, unsigned char *nrbitsp)
513{
514 if (bsize < NFS_MIN_FILE_IO_SIZE)
515 bsize = NFS_DEF_FILE_IO_SIZE;
516 else if (bsize >= NFS_MAX_FILE_IO_SIZE)
517 bsize = NFS_MAX_FILE_IO_SIZE;
518
519 return nfs_block_bits(bsize, nrbitsp);
520}
521
522
523
524
525static inline
526void nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize)
527{
528 sb->s_maxbytes = (loff_t)maxfilesize;
529 if (sb->s_maxbytes > MAX_LFS_FILESIZE || sb->s_maxbytes <= 0)
530 sb->s_maxbytes = MAX_LFS_FILESIZE;
531}
532
533
534
535
536static inline
537unsigned int nfs_page_length(struct page *page)
538{
539 loff_t i_size = i_size_read(page_file_mapping(page)->host);
540
541 if (i_size > 0) {
542 pgoff_t page_index = page_file_index(page);
543 pgoff_t end_index = (i_size - 1) >> PAGE_CACHE_SHIFT;
544 if (page_index < end_index)
545 return PAGE_CACHE_SIZE;
546 if (page_index == end_index)
547 return ((i_size - 1) & ~PAGE_CACHE_MASK) + 1;
548 }
549 return 0;
550}
551
552
553
554
555static inline
556unsigned char nfs_umode_to_dtype(umode_t mode)
557{
558 return (mode >> 12) & 15;
559}
560
561
562
563
564
565static inline
566unsigned int nfs_page_array_len(unsigned int base, size_t len)
567{
568 return ((unsigned long)len + (unsigned long)base +
569 PAGE_SIZE - 1) >> PAGE_SHIFT;
570}
571
572
573
574
575
576
577
578
579static inline
580u64 nfs_timespec_to_change_attr(const struct timespec *ts)
581{
582 return ((u64)ts->tv_sec << 30) + ts->tv_nsec;
583}
584
585#ifdef CONFIG_CRC32
586
587
588
589
590
591
592
593static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh)
594{
595 return ~crc32_le(0xFFFFFFFF, &fh->data[0], fh->size);
596}
597#else
598static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh)
599{
600 return 0;
601}
602#endif
603
