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 struct nfs_auth_info auth_info;
92 rpc_authflavor_t selected_flavor;
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_server_remove_lists(struct nfs_server *);
158void nfs_init_timeout_values(struct rpc_timeout *, int, unsigned int, unsigned int);
159int nfs_init_server_rpcclient(struct nfs_server *, const struct rpc_timeout *t,
160 rpc_authflavor_t);
161struct nfs_server *nfs_alloc_server(void);
162void nfs_server_copy_userdata(struct nfs_server *, struct nfs_server *);
163
164extern void nfs_cleanup_cb_ident_idr(struct net *);
165extern void nfs_put_client(struct nfs_client *);
166extern void nfs_free_client(struct nfs_client *);
167extern struct nfs_client *nfs4_find_client_ident(struct net *, int);
168extern struct nfs_client *
169nfs4_find_client_sessionid(struct net *, const struct sockaddr *,
170 struct nfs4_sessionid *, u32);
171extern struct nfs_server *nfs_create_server(struct nfs_mount_info *,
172 struct nfs_subversion *);
173extern struct nfs_server *nfs4_create_server(
174 struct nfs_mount_info *,
175 struct nfs_subversion *);
176extern struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *,
177 struct nfs_fh *);
178extern int nfs4_update_server(struct nfs_server *server, const char *hostname,
179 struct sockaddr *sap, size_t salen,
180 struct net *net);
181extern void nfs_free_server(struct nfs_server *server);
182extern struct nfs_server *nfs_clone_server(struct nfs_server *,
183 struct nfs_fh *,
184 struct nfs_fattr *,
185 rpc_authflavor_t);
186extern int nfs_wait_client_init_complete(const struct nfs_client *clp);
187extern void nfs_mark_client_ready(struct nfs_client *clp, int state);
188extern struct nfs_client *nfs4_set_ds_client(struct nfs_client* mds_clp,
189 const struct sockaddr *ds_addr,
190 int ds_addrlen, int ds_proto,
191 unsigned int ds_timeo,
192 unsigned int ds_retrans);
193extern struct rpc_clnt *nfs4_find_or_create_ds_client(struct nfs_client *,
194 struct inode *);
195#ifdef CONFIG_PROC_FS
196extern int __init nfs_fs_proc_init(void);
197extern void nfs_fs_proc_exit(void);
198#else
199static inline int nfs_fs_proc_init(void)
200{
201 return 0;
202}
203static inline void nfs_fs_proc_exit(void)
204{
205}
206#endif
207
208#ifdef CONFIG_NFS_V4_1
209int nfs_sockaddr_match_ipaddr(const struct sockaddr *, const struct sockaddr *);
210#endif
211
212
213#if IS_ENABLED(CONFIG_NFS_V3)
214struct nfs_server *nfs3_create_server(struct nfs_mount_info *, struct nfs_subversion *);
215struct nfs_server *nfs3_clone_server(struct nfs_server *, struct nfs_fh *,
216 struct nfs_fattr *, rpc_authflavor_t);
217#endif
218
219
220extern struct svc_version nfs4_callback_version1;
221extern struct svc_version nfs4_callback_version4;
222
223struct nfs_pageio_descriptor;
224
225extern int __init nfs_init_nfspagecache(void);
226extern void nfs_destroy_nfspagecache(void);
227extern int __init nfs_init_readpagecache(void);
228extern void nfs_destroy_readpagecache(void);
229extern int __init nfs_init_writepagecache(void);
230extern void nfs_destroy_writepagecache(void);
231
232extern int __init nfs_init_directcache(void);
233extern void nfs_destroy_directcache(void);
234extern bool nfs_pgarray_set(struct nfs_page_array *p, unsigned int pagecount);
235extern void nfs_pgheader_init(struct nfs_pageio_descriptor *desc,
236 struct nfs_pgio_header *hdr,
237 void (*release)(struct nfs_pgio_header *hdr));
238void nfs_set_pgio_error(struct nfs_pgio_header *hdr, int error, loff_t pos);
239int nfs_iocounter_wait(struct nfs_io_counter *c);
240
241static inline void nfs_iocounter_init(struct nfs_io_counter *c)
242{
243 c->flags = 0;
244 atomic_set(&c->io_count, 0);
245}
246
247
248extern struct rpc_procinfo nfs_procedures[];
249extern int nfs2_decode_dirent(struct xdr_stream *,
250 struct nfs_entry *, int);
251
252
253extern struct rpc_procinfo nfs3_procedures[];
254extern int nfs3_decode_dirent(struct xdr_stream *,
255 struct nfs_entry *, int);
256
257
258#if IS_ENABLED(CONFIG_NFS_V4)
259extern int nfs4_decode_dirent(struct xdr_stream *,
260 struct nfs_entry *, int);
261#endif
262#ifdef CONFIG_NFS_V4_1
263extern const u32 nfs41_maxread_overhead;
264extern const u32 nfs41_maxwrite_overhead;
265extern const u32 nfs41_maxgetdevinfo_overhead;
266#endif
267
268
269#if IS_ENABLED(CONFIG_NFS_V4)
270extern struct rpc_procinfo nfs4_procedures[];
271#endif
272
273#ifdef CONFIG_NFS_V4_SECURITY_LABEL
274extern struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags);
275static inline void nfs4_label_free(struct nfs4_label *label)
276{
277 if (label) {
278 kfree(label->label);
279 kfree(label);
280 }
281 return;
282}
283
284static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi)
285{
286 if (nfs_server_capable(&nfsi->vfs_inode, NFS_CAP_SECURITY_LABEL))
287 nfsi->cache_validity |= NFS_INO_INVALID_LABEL;
288}
289#else
290static inline struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags) { return NULL; }
291static inline void nfs4_label_free(void *label) {}
292static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi)
293{
294}
295#endif
296
297
298void nfs_close_context(struct nfs_open_context *ctx, int is_sync);
299extern struct nfs_client *nfs_init_client(struct nfs_client *clp,
300 const struct rpc_timeout *timeparms,
301 const char *ip_addr);
302
303
304extern unsigned long nfs_access_cache_count(struct shrinker *shrink,
305 struct shrink_control *sc);
306extern unsigned long nfs_access_cache_scan(struct shrinker *shrink,
307 struct shrink_control *sc);
308struct dentry *nfs_lookup(struct inode *, struct dentry *, unsigned int);
309int nfs_create(struct inode *, struct dentry *, umode_t, bool);
310int nfs_mkdir(struct inode *, struct dentry *, umode_t);
311int nfs_rmdir(struct inode *, struct dentry *);
312int nfs_unlink(struct inode *, struct dentry *);
313int nfs_symlink(struct inode *, struct dentry *, const char *);
314int nfs_link(struct dentry *, struct inode *, struct dentry *);
315int nfs_mknod(struct inode *, struct dentry *, umode_t, dev_t);
316int nfs_rename(struct inode *, struct dentry *, struct inode *, struct dentry *);
317
318
319int nfs_file_fsync_commit(struct file *, loff_t, loff_t, int);
320loff_t nfs_file_llseek(struct file *, loff_t, int);
321int nfs_file_flush(struct file *, fl_owner_t);
322ssize_t nfs_file_read(struct kiocb *, const struct iovec *, unsigned long, loff_t);
323ssize_t nfs_file_splice_read(struct file *, loff_t *, struct pipe_inode_info *,
324 size_t, unsigned int);
325int nfs_file_mmap(struct file *, struct vm_area_struct *);
326ssize_t nfs_file_write(struct kiocb *, const struct iovec *, unsigned long, loff_t);
327int nfs_file_release(struct inode *, struct file *);
328int nfs_lock(struct file *, int, struct file_lock *);
329int nfs_flock(struct file *, int, struct file_lock *);
330ssize_t nfs_file_splice_write(struct pipe_inode_info *, struct file *, loff_t *,
331 size_t, unsigned int);
332int nfs_check_flags(int);
333int nfs_setlease(struct file *, long, struct file_lock **);
334
335
336extern struct workqueue_struct *nfsiod_workqueue;
337extern struct inode *nfs_alloc_inode(struct super_block *sb);
338extern void nfs_destroy_inode(struct inode *);
339extern int nfs_write_inode(struct inode *, struct writeback_control *);
340extern int nfs_drop_inode(struct inode *);
341extern void nfs_clear_inode(struct inode *);
342extern void nfs_evict_inode(struct inode *);
343void nfs_zap_acl_cache(struct inode *inode);
344extern int nfs_wait_bit_killable(void *word);
345
346
347extern const struct super_operations nfs_sops;
348extern struct file_system_type nfs_fs_type;
349extern struct file_system_type nfs_xdev_fs_type;
350#if IS_ENABLED(CONFIG_NFS_V4)
351extern struct file_system_type nfs4_xdev_fs_type;
352extern struct file_system_type nfs4_referral_fs_type;
353#endif
354bool nfs_auth_info_match(const struct nfs_auth_info *, rpc_authflavor_t);
355struct dentry *nfs_try_mount(int, const char *, struct nfs_mount_info *,
356 struct nfs_subversion *);
357void nfs_initialise_sb(struct super_block *);
358int nfs_set_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *);
359int nfs_clone_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *);
360struct dentry *nfs_fs_mount_common(struct nfs_server *, int, const char *,
361 struct nfs_mount_info *, struct nfs_subversion *);
362struct dentry *nfs_fs_mount(struct file_system_type *, int, const char *, void *);
363struct dentry * nfs_xdev_mount_common(struct file_system_type *, int,
364 const char *, struct nfs_mount_info *);
365void nfs_kill_super(struct super_block *);
366void nfs_fill_super(struct super_block *, struct nfs_mount_info *);
367
368extern struct rpc_stat nfs_rpcstat;
369
370extern int __init register_nfs_fs(void);
371extern void __exit unregister_nfs_fs(void);
372extern void nfs_sb_active(struct super_block *sb);
373extern void nfs_sb_deactive(struct super_block *sb);
374
375
376#define NFS_PATH_CANONICAL 1
377extern char *nfs_path(char **p, struct dentry *dentry,
378 char *buffer, ssize_t buflen, unsigned flags);
379extern struct vfsmount *nfs_d_automount(struct path *path);
380struct vfsmount *nfs_submount(struct nfs_server *, struct dentry *,
381 struct nfs_fh *, struct nfs_fattr *);
382struct vfsmount *nfs_do_submount(struct dentry *, struct nfs_fh *,
383 struct nfs_fattr *, rpc_authflavor_t);
384
385
386extern struct dentry *nfs_get_root(struct super_block *, struct nfs_fh *,
387 const char *);
388#if IS_ENABLED(CONFIG_NFS_V4)
389extern struct dentry *nfs4_get_root(struct super_block *, struct nfs_fh *,
390 const char *);
391
392extern int nfs4_get_rootfh(struct nfs_server *server, struct nfs_fh *mntfh, bool);
393#endif
394
395struct nfs_pgio_completion_ops;
396
397extern struct nfs_read_header *nfs_readhdr_alloc(void);
398extern void nfs_readhdr_free(struct nfs_pgio_header *hdr);
399extern void nfs_pageio_init_read(struct nfs_pageio_descriptor *pgio,
400 struct inode *inode,
401 const struct nfs_pgio_completion_ops *compl_ops);
402extern int nfs_initiate_read(struct rpc_clnt *clnt,
403 struct nfs_read_data *data,
404 const struct rpc_call_ops *call_ops, int flags);
405extern void nfs_read_prepare(struct rpc_task *task, void *calldata);
406extern int nfs_generic_pagein(struct nfs_pageio_descriptor *desc,
407 struct nfs_pgio_header *hdr);
408extern void nfs_pageio_reset_read_mds(struct nfs_pageio_descriptor *pgio);
409extern void nfs_readdata_release(struct nfs_read_data *rdata);
410
411
412void nfs_clone_super(struct super_block *, struct nfs_mount_info *);
413void nfs_umount_begin(struct super_block *);
414int nfs_statfs(struct dentry *, struct kstatfs *);
415int nfs_show_options(struct seq_file *, struct dentry *);
416int nfs_show_devname(struct seq_file *, struct dentry *);
417int nfs_show_path(struct seq_file *, struct dentry *);
418int nfs_show_stats(struct seq_file *, struct dentry *);
419void nfs_put_super(struct super_block *);
420int nfs_remount(struct super_block *sb, int *flags, char *raw_data);
421
422
423extern void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio,
424 struct inode *inode, int ioflags,
425 const struct nfs_pgio_completion_ops *compl_ops);
426extern struct nfs_write_header *nfs_writehdr_alloc(void);
427extern void nfs_writehdr_free(struct nfs_pgio_header *hdr);
428extern int nfs_generic_flush(struct nfs_pageio_descriptor *desc,
429 struct nfs_pgio_header *hdr);
430extern void nfs_pageio_reset_write_mds(struct nfs_pageio_descriptor *pgio);
431extern void nfs_writedata_release(struct nfs_write_data *wdata);
432extern void nfs_commit_free(struct nfs_commit_data *p);
433extern int nfs_initiate_write(struct rpc_clnt *clnt,
434 struct nfs_write_data *data,
435 const struct rpc_call_ops *call_ops,
436 int how, int flags);
437extern void nfs_write_prepare(struct rpc_task *task, void *calldata);
438extern void nfs_commit_prepare(struct rpc_task *task, void *calldata);
439extern int nfs_initiate_commit(struct rpc_clnt *clnt,
440 struct nfs_commit_data *data,
441 const struct rpc_call_ops *call_ops,
442 int how, int flags);
443extern void nfs_init_commit(struct nfs_commit_data *data,
444 struct list_head *head,
445 struct pnfs_layout_segment *lseg,
446 struct nfs_commit_info *cinfo);
447int nfs_scan_commit_list(struct list_head *src, struct list_head *dst,
448 struct nfs_commit_info *cinfo, int max);
449int nfs_scan_commit(struct inode *inode, struct list_head *dst,
450 struct nfs_commit_info *cinfo);
451void nfs_mark_request_commit(struct nfs_page *req,
452 struct pnfs_layout_segment *lseg,
453 struct nfs_commit_info *cinfo);
454int nfs_generic_commit_list(struct inode *inode, struct list_head *head,
455 int how, struct nfs_commit_info *cinfo);
456void nfs_retry_commit(struct list_head *page_list,
457 struct pnfs_layout_segment *lseg,
458 struct nfs_commit_info *cinfo);
459void nfs_commitdata_release(struct nfs_commit_data *data);
460void nfs_request_add_commit_list(struct nfs_page *req, struct list_head *dst,
461 struct nfs_commit_info *cinfo);
462void nfs_request_remove_commit_list(struct nfs_page *req,
463 struct nfs_commit_info *cinfo);
464void nfs_init_cinfo(struct nfs_commit_info *cinfo,
465 struct inode *inode,
466 struct nfs_direct_req *dreq);
467int nfs_key_timeout_notify(struct file *filp, struct inode *inode);
468bool nfs_ctx_key_to_expire(struct nfs_open_context *ctx);
469
470#ifdef CONFIG_MIGRATION
471extern int nfs_migrate_page(struct address_space *,
472 struct page *, struct page *, enum migrate_mode);
473#else
474#define nfs_migrate_page NULL
475#endif
476
477
478void nfs_init_cinfo_from_dreq(struct nfs_commit_info *cinfo,
479 struct nfs_direct_req *dreq);
480static inline void nfs_inode_dio_wait(struct inode *inode)
481{
482 inode_dio_wait(inode);
483}
484extern ssize_t nfs_dreq_bytes_left(struct nfs_direct_req *dreq);
485
486
487extern void __nfs4_read_done_cb(struct nfs_read_data *);
488extern struct nfs_client *nfs4_init_client(struct nfs_client *clp,
489 const struct rpc_timeout *timeparms,
490 const char *ip_addr);
491extern int nfs40_walk_client_list(struct nfs_client *clp,
492 struct nfs_client **result,
493 struct rpc_cred *cred);
494extern int nfs41_walk_client_list(struct nfs_client *clp,
495 struct nfs_client **result,
496 struct rpc_cred *cred);
497
498
499
500
501static inline char *nfs_devname(struct dentry *dentry,
502 char *buffer, ssize_t buflen)
503{
504 char *dummy;
505 return nfs_path(&dummy, dentry, buffer, buflen, NFS_PATH_CANONICAL);
506}
507
508
509
510
511static inline
512unsigned long nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp)
513{
514
515 if ((bsize & (bsize - 1)) || nrbitsp) {
516 unsigned char nrbits;
517
518 for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--)
519 ;
520 bsize = 1 << nrbits;
521 if (nrbitsp)
522 *nrbitsp = nrbits;
523 }
524
525 return bsize;
526}
527
528
529
530
531static inline blkcnt_t nfs_calc_block_size(u64 tsize)
532{
533 blkcnt_t used = (tsize + 511) >> 9;
534 return (used > ULONG_MAX) ? ULONG_MAX : used;
535}
536
537
538
539
540static inline
541unsigned long nfs_block_size(unsigned long bsize, unsigned char *nrbitsp)
542{
543 if (bsize < NFS_MIN_FILE_IO_SIZE)
544 bsize = NFS_DEF_FILE_IO_SIZE;
545 else if (bsize >= NFS_MAX_FILE_IO_SIZE)
546 bsize = NFS_MAX_FILE_IO_SIZE;
547
548 return nfs_block_bits(bsize, nrbitsp);
549}
550
551
552
553
554static inline
555void nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize)
556{
557 sb->s_maxbytes = (loff_t)maxfilesize;
558 if (sb->s_maxbytes > MAX_LFS_FILESIZE || sb->s_maxbytes <= 0)
559 sb->s_maxbytes = MAX_LFS_FILESIZE;
560}
561
562
563
564
565static inline
566unsigned int nfs_page_length(struct page *page)
567{
568 loff_t i_size = i_size_read(page_file_mapping(page)->host);
569
570 if (i_size > 0) {
571 pgoff_t page_index = page_file_index(page);
572 pgoff_t end_index = (i_size - 1) >> PAGE_CACHE_SHIFT;
573 if (page_index < end_index)
574 return PAGE_CACHE_SIZE;
575 if (page_index == end_index)
576 return ((i_size - 1) & ~PAGE_CACHE_MASK) + 1;
577 }
578 return 0;
579}
580
581
582
583
584static inline
585unsigned char nfs_umode_to_dtype(umode_t mode)
586{
587 return (mode >> 12) & 15;
588}
589
590
591
592
593
594static inline
595unsigned int nfs_page_array_len(unsigned int base, size_t len)
596{
597 return ((unsigned long)len + (unsigned long)base +
598 PAGE_SIZE - 1) >> PAGE_SHIFT;
599}
600
601
602
603
604
605
606
607
608static inline
609u64 nfs_timespec_to_change_attr(const struct timespec *ts)
610{
611 return ((u64)ts->tv_sec << 30) + ts->tv_nsec;
612}
613
614#ifdef CONFIG_CRC32
615
616
617
618
619
620
621
622static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh)
623{
624 return ~crc32_le(0xFFFFFFFF, &fh->data[0], fh->size);
625}
626#else
627static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh)
628{
629 return 0;
630}
631#endif
632
