projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
NFS: stop using NFS_MOUNT_SECFLAVOUR server flag
[deliverable/linux.git] / fs / nfs / internal.h
CommitLineData
f7b422b1
DH		 1/*
2 * NFS internal definitions
3 */
4
eedc020e 5#include "nfs4_fs.h"
f7b422b1 6#include <linux/mount.h>
f9c3a380 7#include <linux/security.h>
1264a2f0 8#include <linux/crc32.h>
f7b422b1 9
08734048
DH		 10#define NFS_MS_MASK (MS_RDONLY|MS_NOSUID|MS_NODEV|MS_NOEXEC|MS_SYNCHRONOUS)
11
54ceac45 12struct nfs_string;
54ceac45
DH		 13
14/* Maximum number of readahead requests
15 * FIXME: this should really be a sysctl so that users may tune it to suit
16 * their needs. People that do NFS over a slow network, might for
17 * instance want to reduce it to something closer to 1 for improved
18 * interactive response.
19 */
20#define NFS_MAX_READAHEAD (RPC_DEF_SLOT_TABLE - 1)
21
7ebb9315
BS		 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
533eb461
AA		 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
f7b422b1
DH		 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;
6677d095
CL		 46 struct sockaddr *addr;
47 size_t addrlen;
f7b422b1
DH		 48 rpc_authflavor_t authflavor;
49};
50
a14017db
CL		 51/*
52 * Note: RFC 1813 doesn't limit the number of auth flavors that
53 * a server can return, so make something up.
54 */
55#define NFS_MAX_SECFLAVORS (12)
56
4cfd74fc
CL		 57/*
58 * Value used if the user did not specify a port value.
59 */
60#define NFS_UNSPEC_PORT (-1)
61
56e4ebf8
BS		 62/*
63 * Maximum number of pages that readdir can use for creating
64 * a vmapped array of pages.
65 */
66#define NFS_MAX_READDIR_PAGES 8
67
fcf10398
BS		 68struct nfs_client_initdata {
69 unsigned long init_flags;
70 const char *hostname;
71 const struct sockaddr *addr;
72 size_t addrlen;
ab7017a3 73 struct nfs_subversion *nfs_mod;
fcf10398
BS		 74 int proto;
75 u32 minorversion;
76 struct net *net;
77};
78
6b18eaa0
TT		 79/*
80 * In-kernel mount arguments
81 */
82struct nfs_parsed_mount_data {
83 int flags;
8cb7f74e
CL		 84 unsigned int rsize, wsize;
85 unsigned int timeo, retrans;
86 unsigned int acregmin, acregmax,
6b18eaa0 87 acdirmin, acdirmax;
8cb7f74e 88 unsigned int namlen;
b797cac7 89 unsigned int options;
6b18eaa0 90 unsigned int bsize;
a3f73c27
WAA		 91 struct nfs_auth_info auth_info;
92 rpc_authflavor_t selected_flavor;
6b18eaa0 93 char *client_address;
764302cc 94 unsigned int version;
3fd5be9e 95 unsigned int minorversion;
08734048 96 char *fscache_uniq;
b72e4f42 97 bool need_mount;
6b18eaa0
TT		 98
99 struct {
4c568017
CL		 100 struct sockaddr_storage address;
101 size_t addrlen;
6b18eaa0 102 char *hostname;
78fa701f 103 u32 version;
4cfd74fc 104 int port;
78fa701f 105 unsigned short protocol;
6b18eaa0
TT		 106 } mount_server;
107
108 struct {
4c568017
CL		 109 struct sockaddr_storage address;
110 size_t addrlen;
6b18eaa0
TT		 111 char *hostname;
112 char *export_path;
4cfd74fc 113 int port;
78fa701f 114 unsigned short protocol;
6b18eaa0 115 } nfs_server;
f9c3a380
EP		 116
117 struct security_mnt_opts lsm_opts;
e50a7a1a 118 struct net *net;
6b18eaa0
TT		 119};
120
146ec944 121/* mount_clnt.c */
c5d120f8
CL		 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;
50a737f8 130 int noresvport;
8e02f6b9
CL		 131 unsigned int *auth_flav_len;
132 rpc_authflavor_t *auth_flavs;
6d59b8d5 133 struct net *net;
c5d120f8
CL		 134};
135
fbdefd64
BS		 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
c5d120f8 144extern int nfs_mount(struct nfs_mount_request *info);
0b524123 145extern void nfs_umount(const struct nfs_mount_request *info);
146ec944 146
24c8dbbb 147/* client.c */
a613fa16 148extern const struct rpc_program nfs_program;
6b13168b 149extern void nfs_clients_init(struct net *net);
6663ee7f 150extern struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *);
428360d7 151int nfs_create_rpc_client(struct nfs_client *, const struct rpc_timeout *, rpc_authflavor_t);
fcf10398
BS		 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 *);
32e62b7c 157void nfs_server_remove_lists(struct nfs_server *);
fcf10398
BS		 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 *);
54ceac45 163
28cd1b3f 164extern void nfs_cleanup_cb_ident_idr(struct net *);
24c8dbbb 165extern void nfs_put_client(struct nfs_client *);
cdb7eced 166extern void nfs_free_client(struct nfs_client *);
28cd1b3f 167extern struct nfs_client *nfs4_find_client_ident(struct net *, int);
c36fca52 168extern struct nfs_client *
c7add9a9 169nfs4_find_client_sessionid(struct net *, const struct sockaddr *,
459de2ed 170 struct nfs4_sessionid *, u32);
1179acc6 171extern struct nfs_server *nfs_create_server(struct nfs_mount_info *,
ab7017a3 172 struct nfs_subversion *);
91ea40b9 173extern struct nfs_server *nfs4_create_server(
1179acc6
BS		 174 struct nfs_mount_info *,
175 struct nfs_subversion *);
54ceac45
DH		 176extern struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *,
177 struct nfs_fh *);
32e62b7c
CL		 178extern int nfs4_update_server(struct nfs_server *server, const char *hostname,
179 struct sockaddr *sap, size_t salen);
54ceac45
DH		 180extern void nfs_free_server(struct nfs_server *server);
181extern struct nfs_server *nfs_clone_server(struct nfs_server *,
182 struct nfs_fh *,
7e6eb683
BS		 183 struct nfs_fattr *,
184 rpc_authflavor_t);
4697bd5e 185extern int nfs_wait_client_init_complete(const struct nfs_client *clp);
76db6d95 186extern void nfs_mark_client_ready(struct nfs_client *clp, int state);
d83217c1
AA		 187extern struct nfs_client *nfs4_set_ds_client(struct nfs_client* mds_clp,
188 const struct sockaddr *ds_addr,
98fc685a
AA		 189 int ds_addrlen, int ds_proto,
190 unsigned int ds_timeo,
191 unsigned int ds_retrans);
0e20162e
AA		 192extern struct rpc_clnt *nfs4_find_or_create_ds_client(struct nfs_client *,
193 struct inode *);
6aaca566
DH		 194#ifdef CONFIG_PROC_FS
195extern int __init nfs_fs_proc_init(void);
196extern void nfs_fs_proc_exit(void);
197#else
198static inline int nfs_fs_proc_init(void)
199{
200 return 0;
201}
202static inline void nfs_fs_proc_exit(void)
203{
204}
205#endif
24c8dbbb 206
fcf10398
BS		 207#ifdef CONFIG_NFS_V4_1
208int nfs_sockaddr_match_ipaddr(const struct sockaddr *, const struct sockaddr *);
209#endif
210
1179acc6 211/* nfs3client.c */
1c606fb7 212#if IS_ENABLED(CONFIG_NFS_V3)
1179acc6
BS		 213struct nfs_server *nfs3_create_server(struct nfs_mount_info *, struct nfs_subversion *);
214struct nfs_server *nfs3_clone_server(struct nfs_server *, struct nfs_fh *,
215 struct nfs_fattr *, rpc_authflavor_t);
216#endif
217
f7b422b1
DH		 218/* callback_xdr.c */
219extern struct svc_version nfs4_callback_version1;
07bccc2d 220extern struct svc_version nfs4_callback_version4;
f7b422b1 221
4db6e0b7 222struct nfs_pageio_descriptor;
f7b422b1
DH		 223/* pagelist.c */
224extern int __init nfs_init_nfspagecache(void);
266bee88 225extern void nfs_destroy_nfspagecache(void);
f7b422b1 226extern int __init nfs_init_readpagecache(void);
266bee88 227extern void nfs_destroy_readpagecache(void);
f7b422b1 228extern int __init nfs_init_writepagecache(void);
266bee88 229extern void nfs_destroy_writepagecache(void);
f7b422b1 230
f7b422b1 231extern int __init nfs_init_directcache(void);
266bee88 232extern void nfs_destroy_directcache(void);
30dd374f 233extern bool nfs_pgarray_set(struct nfs_page_array *p, unsigned int pagecount);
4db6e0b7
FI		 234extern void nfs_pgheader_init(struct nfs_pageio_descriptor *desc,
235 struct nfs_pgio_header *hdr,
236 void (*release)(struct nfs_pgio_header *hdr));
237void nfs_set_pgio_error(struct nfs_pgio_header *hdr, int error, loff_t pos);
577b4232
TM		 238int nfs_iocounter_wait(struct nfs_io_counter *c);
239
240static inline void nfs_iocounter_init(struct nfs_io_counter *c)
241{
242 c->flags = 0;
243 atomic_set(&c->io_count, 0);
244}
f7b422b1
DH		 245
246/* nfs2xdr.c */
247extern struct rpc_procinfo nfs_procedures[];
573c4e1e
CL		 248extern int nfs2_decode_dirent(struct xdr_stream *,
249 struct nfs_entry *, int);
f7b422b1
DH		 250
251/* nfs3xdr.c */
252extern struct rpc_procinfo nfs3_procedures[];
573c4e1e
CL		 253extern int nfs3_decode_dirent(struct xdr_stream *,
254 struct nfs_entry *, int);
f7b422b1
DH		 255
256/* nfs4xdr.c */
89d77c8f 257#if IS_ENABLED(CONFIG_NFS_V4)
573c4e1e
CL		 258extern int nfs4_decode_dirent(struct xdr_stream *,
259 struct nfs_entry *, int);
7d4e2747 260#endif
2449ea2e
AB		 261#ifdef CONFIG_NFS_V4_1
262extern const u32 nfs41_maxread_overhead;
263extern const u32 nfs41_maxwrite_overhead;
f1c097be 264extern const u32 nfs41_maxgetdevinfo_overhead;
2449ea2e 265#endif
f7b422b1
DH		 266
267/* nfs4proc.c */
89d77c8f 268#if IS_ENABLED(CONFIG_NFS_V4)
f7b422b1 269extern struct rpc_procinfo nfs4_procedures[];
d75d5414 270#endif
f7b422b1 271
7fe5c398
TM		 272/* proc.c */
273void nfs_close_context(struct nfs_open_context *ctx, int is_sync);
8cab4c39 274extern struct nfs_client *nfs_init_client(struct nfs_client *clp,
45a52a02 275 const struct rpc_timeout *timeparms,
f8407299 276 const char *ip_addr);
7fe5c398 277
979df72e 278/* dir.c */
1ab6c499
DC		 279extern unsigned long nfs_access_cache_count(struct shrinker *shrink,
280 struct shrink_control *sc);
281extern unsigned long nfs_access_cache_scan(struct shrinker *shrink,
282 struct shrink_control *sc);
597d9289
BS		 283struct dentry *nfs_lookup(struct inode *, struct dentry *, unsigned int);
284int nfs_create(struct inode *, struct dentry *, umode_t, bool);
285int nfs_mkdir(struct inode *, struct dentry *, umode_t);
286int nfs_rmdir(struct inode *, struct dentry *);
287int nfs_unlink(struct inode *, struct dentry *);
288int nfs_symlink(struct inode *, struct dentry *, const char *);
289int nfs_link(struct dentry *, struct inode *, struct dentry *);
290int nfs_mknod(struct inode *, struct dentry *, umode_t, dev_t);
291int nfs_rename(struct inode *, struct dentry *, struct inode *, struct dentry *);
979df72e 292
ce4ef7c0
BS		 293/* file.c */
294int nfs_file_fsync_commit(struct file *, loff_t, loff_t, int);
295loff_t nfs_file_llseek(struct file *, loff_t, int);
296int nfs_file_flush(struct file *, fl_owner_t);
297ssize_t nfs_file_read(struct kiocb *, const struct iovec *, unsigned long, loff_t);
298ssize_t nfs_file_splice_read(struct file *, loff_t *, struct pipe_inode_info *,
299 size_t, unsigned int);
300int nfs_file_mmap(struct file *, struct vm_area_struct *);
301ssize_t nfs_file_write(struct kiocb *, const struct iovec *, unsigned long, loff_t);
302int nfs_file_release(struct inode *, struct file *);
303int nfs_lock(struct file *, int, struct file_lock *);
304int nfs_flock(struct file *, int, struct file_lock *);
305ssize_t nfs_file_splice_write(struct pipe_inode_info *, struct file *, loff_t *,
306 size_t, unsigned int);
307int nfs_check_flags(int);
308int nfs_setlease(struct file *, long, struct file_lock **);
309
f7b422b1 310/* inode.c */
5746006f 311extern struct workqueue_struct *nfsiod_workqueue;
f7b422b1
DH		 312extern struct inode *nfs_alloc_inode(struct super_block *sb);
313extern void nfs_destroy_inode(struct inode *);
a9185b41 314extern int nfs_write_inode(struct inode *, struct writeback_control *);
eed99357 315extern int nfs_drop_inode(struct inode *);
19d87ca3 316extern void nfs_clear_inode(struct inode *);
b57922d9 317extern void nfs_evict_inode(struct inode *);
f41f7418 318void nfs_zap_acl_cache(struct inode *inode);
72cb77f4 319extern int nfs_wait_bit_killable(void *word);
f7b422b1
DH		 320
321/* super.c */
6a74490d 322extern const struct super_operations nfs_sops;
ab7017a3 323extern struct file_system_type nfs_fs_type;
54ceac45 324extern struct file_system_type nfs_xdev_fs_type;
89d77c8f 325#if IS_ENABLED(CONFIG_NFS_V4)
54ceac45
DH		 326extern struct file_system_type nfs4_xdev_fs_type;
327extern struct file_system_type nfs4_referral_fs_type;
f7b422b1 328#endif
ff9099f2
BS		 329struct dentry *nfs_try_mount(int, const char *, struct nfs_mount_info *,
330 struct nfs_subversion *);
fbdefd64
BS		 331void nfs_initialise_sb(struct super_block *);
332int nfs_set_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *);
333int nfs_clone_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *);
ab7017a3
BS		 334struct dentry *nfs_fs_mount_common(struct nfs_server *, int, const char *,
335 struct nfs_mount_info *, struct nfs_subversion *);
fbdefd64
BS		 336struct dentry *nfs_fs_mount(struct file_system_type *, int, const char *, void *);
337struct dentry * nfs_xdev_mount_common(struct file_system_type *, int,
338 const char *, struct nfs_mount_info *);
339void nfs_kill_super(struct super_block *);
340void nfs_fill_super(struct super_block *, struct nfs_mount_info *);
4ebd9ab3 341
f7b422b1 342extern struct rpc_stat nfs_rpcstat;
4ebd9ab3 343
f7b422b1
DH		 344extern int __init register_nfs_fs(void);
345extern void __exit unregister_nfs_fs(void);
1daef0a8
TM		 346extern void nfs_sb_active(struct super_block *sb);
347extern void nfs_sb_deactive(struct super_block *sb);
f7b422b1
DH		 348
349/* namespace.c */
97a54868 350#define NFS_PATH_CANONICAL 1
b514f872 351extern char *nfs_path(char **p, struct dentry *dentry,
97a54868 352 char *buffer, ssize_t buflen, unsigned flags);
36d43a43 353extern struct vfsmount *nfs_d_automount(struct path *path);
281cad46
BS		 354struct vfsmount *nfs_submount(struct nfs_server *, struct dentry *,
355 struct nfs_fh *, struct nfs_fattr *);
356struct vfsmount *nfs_do_submount(struct dentry *, struct nfs_fh *,
357 struct nfs_fattr *, rpc_authflavor_t);
f7b422b1 358
54ceac45 359/* getroot.c */
0d5839ad
AV		 360extern struct dentry *nfs_get_root(struct super_block *, struct nfs_fh *,
361 const char *);
89d77c8f 362#if IS_ENABLED(CONFIG_NFS_V4)
0d5839ad
AV		 363extern struct dentry *nfs4_get_root(struct super_block *, struct nfs_fh *,
364 const char *);
54ceac45 365
5e6b1990 366extern int nfs4_get_rootfh(struct nfs_server *server, struct nfs_fh *mntfh, bool);
7d4e2747 367#endif
f7b422b1 368
061ae2ed 369struct nfs_pgio_completion_ops;
f11c88af 370/* read.c */
4db6e0b7 371extern struct nfs_read_header *nfs_readhdr_alloc(void);
cd841605 372extern void nfs_readhdr_free(struct nfs_pgio_header *hdr);
584aa810
FI		 373extern void nfs_pageio_init_read(struct nfs_pageio_descriptor *pgio,
374 struct inode *inode,
375 const struct nfs_pgio_completion_ops *compl_ops);
c5996c4e
FI		 376extern int nfs_initiate_read(struct rpc_clnt *clnt,
377 struct nfs_read_data *data,
9f0ec176 378 const struct rpc_call_ops *call_ops, int flags);
f11c88af 379extern void nfs_read_prepare(struct rpc_task *task, void *calldata);
493292dd 380extern int nfs_generic_pagein(struct nfs_pageio_descriptor *desc,
4db6e0b7 381 struct nfs_pgio_header *hdr);
493292dd
TM		 382extern void nfs_pageio_reset_read_mds(struct nfs_pageio_descriptor *pgio);
383extern void nfs_readdata_release(struct nfs_read_data *rdata);
e885de1a 384
fbdefd64
BS		 385/* super.c */
386void nfs_clone_super(struct super_block *, struct nfs_mount_info *);
387void nfs_umount_begin(struct super_block *);
388int nfs_statfs(struct dentry *, struct kstatfs *);
389int nfs_show_options(struct seq_file *, struct dentry *);
390int nfs_show_devname(struct seq_file *, struct dentry *);
391int nfs_show_path(struct seq_file *, struct dentry *);
392int nfs_show_stats(struct seq_file *, struct dentry *);
393void nfs_put_super(struct super_block *);
394int nfs_remount(struct super_block *sb, int *flags, char *raw_data);
395
def6ed7e 396/* write.c */
1763da12
FI		 397extern void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio,
398 struct inode *inode, int ioflags,
399 const struct nfs_pgio_completion_ops *compl_ops);
6c75dc0d 400extern struct nfs_write_header *nfs_writehdr_alloc(void);
cd841605 401extern void nfs_writehdr_free(struct nfs_pgio_header *hdr);
dce81290 402extern int nfs_generic_flush(struct nfs_pageio_descriptor *desc,
6c75dc0d 403 struct nfs_pgio_header *hdr);
dce81290
TM		 404extern void nfs_pageio_reset_write_mds(struct nfs_pageio_descriptor *pgio);
405extern void nfs_writedata_release(struct nfs_write_data *wdata);
0b7c0153 406extern void nfs_commit_free(struct nfs_commit_data *p);
c5996c4e
FI		 407extern int nfs_initiate_write(struct rpc_clnt *clnt,
408 struct nfs_write_data *data,
a69aef14 409 const struct rpc_call_ops *call_ops,
9f0ec176 410 int how, int flags);
def6ed7e 411extern void nfs_write_prepare(struct rpc_task *task, void *calldata);
0b7c0153
FI		 412extern void nfs_commit_prepare(struct rpc_task *task, void *calldata);
413extern int nfs_initiate_commit(struct rpc_clnt *clnt,
414 struct nfs_commit_data *data,
e0c2b380 415 const struct rpc_call_ops *call_ops,
9f0ec176 416 int how, int flags);
0b7c0153 417extern void nfs_init_commit(struct nfs_commit_data *data,
e0c2b380 418 struct list_head *head,
f453a54a
FI		 419 struct pnfs_layout_segment *lseg,
420 struct nfs_commit_info *cinfo);
1763da12
FI		 421int nfs_scan_commit_list(struct list_head *src, struct list_head *dst,
422 struct nfs_commit_info *cinfo, int max);
423int nfs_scan_commit(struct inode *inode, struct list_head *dst,
424 struct nfs_commit_info *cinfo);
425void nfs_mark_request_commit(struct nfs_page *req,
426 struct pnfs_layout_segment *lseg,
427 struct nfs_commit_info *cinfo);
428int nfs_generic_commit_list(struct inode *inode, struct list_head *head,
429 int how, struct nfs_commit_info *cinfo);
e0c2b380 430void nfs_retry_commit(struct list_head *page_list,
ea2cf228
FI		 431 struct pnfs_layout_segment *lseg,
432 struct nfs_commit_info *cinfo);
0b7c0153 433void nfs_commitdata_release(struct nfs_commit_data *data);
ea2cf228
FI		 434void nfs_request_add_commit_list(struct nfs_page *req, struct list_head *dst,
435 struct nfs_commit_info *cinfo);
436void nfs_request_remove_commit_list(struct nfs_page *req,
437 struct nfs_commit_info *cinfo);
438void nfs_init_cinfo(struct nfs_commit_info *cinfo,
439 struct inode *inode,
440 struct nfs_direct_req *dreq);
dc24826b
AA		 441int nfs_key_timeout_notify(struct file *filp, struct inode *inode);
442bool nfs_ctx_key_to_expire(struct nfs_open_context *ctx);
e0c2b380 443
074cc1de
TM		 444#ifdef CONFIG_MIGRATION
445extern int nfs_migrate_page(struct address_space *,
a6bc32b8 446 struct page *, struct page *, enum migrate_mode);
074cc1de
TM		 447#else
448#define nfs_migrate_page NULL
449#endif
def6ed7e 450
1763da12
FI		 451/* direct.c */
452void nfs_init_cinfo_from_dreq(struct nfs_commit_info *cinfo,
453 struct nfs_direct_req *dreq);
1d59d61f
TM		 454static inline void nfs_inode_dio_wait(struct inode *inode)
455{
456 inode_dio_wait(inode);
457}
6296556f 458extern ssize_t nfs_dreq_bytes_left(struct nfs_direct_req *dreq);
1763da12 459
cccef3b9 460/* nfs4proc.c */
d20581aa 461extern void __nfs4_read_done_cb(struct nfs_read_data *);
8cab4c39 462extern struct nfs_client *nfs4_init_client(struct nfs_client *clp,
45a52a02 463 const struct rpc_timeout *timeparms,
f8407299 464 const char *ip_addr);
05f4c350
CL		 465extern int nfs40_walk_client_list(struct nfs_client *clp,
466 struct nfs_client **result,
467 struct rpc_cred *cred);
468extern int nfs41_walk_client_list(struct nfs_client *clp,
469 struct nfs_client **result,
470 struct rpc_cred *cred);
cccef3b9 471
f7b422b1
DH		 472/*
473 * Determine the device name as a string
474 */
b514f872 475static inline char *nfs_devname(struct dentry *dentry,
54ceac45 476 char *buffer, ssize_t buflen)
f7b422b1 477{
b514f872 478 char *dummy;
97a54868 479 return nfs_path(&dummy, dentry, buffer, buflen, NFS_PATH_CANONICAL);
f7b422b1
DH		 480}
481
482/*
483 * Determine the actual block size (and log2 thereof)
484 */
485static inline
486unsigned long nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp)
487{
488 /* make sure blocksize is a power of two */
489 if ((bsize & (bsize - 1)) || nrbitsp) {
490 unsigned char nrbits;
491
492 for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--)
493 ;
494 bsize = 1 << nrbits;
495 if (nrbitsp)
496 *nrbitsp = nrbits;
497 }
498
499 return bsize;
500}
501
502/*
503 * Calculate the number of 512byte blocks used.
504 */
9eaa67c6 505static inline blkcnt_t nfs_calc_block_size(u64 tsize)
f7b422b1 506{
9eaa67c6 507 blkcnt_t used = (tsize + 511) >> 9;
f7b422b1
DH		 508 return (used > ULONG_MAX) ? ULONG_MAX : used;
509}
510
511/*
512 * Compute and set NFS server blocksize
513 */
514static inline
515unsigned long nfs_block_size(unsigned long bsize, unsigned char *nrbitsp)
516{
517 if (bsize < NFS_MIN_FILE_IO_SIZE)
518 bsize = NFS_DEF_FILE_IO_SIZE;
519 else if (bsize >= NFS_MAX_FILE_IO_SIZE)
520 bsize = NFS_MAX_FILE_IO_SIZE;
521
522 return nfs_block_bits(bsize, nrbitsp);
523}
524
525/*
526 * Determine the maximum file size for a superblock
527 */
528static inline
529void nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize)
530{
531 sb->s_maxbytes = (loff_t)maxfilesize;
532 if (sb->s_maxbytes > MAX_LFS_FILESIZE || sb->s_maxbytes <= 0)
533 sb->s_maxbytes = MAX_LFS_FILESIZE;
534}
49a70f27
TM		 535
536/*
537 * Determine the number of bytes of data the page contains
538 */
539static inline
540unsigned int nfs_page_length(struct page *page)
541{
d56b4ddf 542 loff_t i_size = i_size_read(page_file_mapping(page)->host);
49a70f27
TM		 543
544 if (i_size > 0) {
d56b4ddf 545 pgoff_t page_index = page_file_index(page);
49a70f27 546 pgoff_t end_index = (i_size - 1) >> PAGE_CACHE_SHIFT;
d56b4ddf 547 if (page_index < end_index)
49a70f27 548 return PAGE_CACHE_SIZE;
d56b4ddf 549 if (page_index == end_index)
49a70f27
TM		 550 return ((i_size - 1) & ~PAGE_CACHE_MASK) + 1;
551 }
552 return 0;
553}
8d5658c9 554
0b26a0bf
TM		 555/*
556 * Convert a umode to a dirent->d_type
557 */
558static inline
559unsigned char nfs_umode_to_dtype(umode_t mode)
560{
561 return (mode >> 12) & 15;
562}
563
8d5658c9
TM		 564/*
565 * Determine the number of pages in an array of length 'len' and
566 * with a base offset of 'base'
567 */
568static inline
569unsigned int nfs_page_array_len(unsigned int base, size_t len)
570{
571 return ((unsigned long)len + (unsigned long)base +
572 PAGE_SIZE - 1) >> PAGE_SHIFT;
573}
0110ee15 574
3a1556e8
TM		 575/*
576 * Convert a struct timespec into a 64-bit change attribute
577 *
578 * This does approximately the same thing as timespec_to_ns(),
579 * but for calculation efficiency, we multiply the seconds by
580 * 1024*1024*1024.
581 */
582static inline
583u64 nfs_timespec_to_change_attr(const struct timespec *ts)
584{
585 return ((u64)ts->tv_sec << 30) + ts->tv_nsec;
586}
1264a2f0
TM		 587
588#ifdef CONFIG_CRC32
589/**
590 * nfs_fhandle_hash - calculate the crc32 hash for the filehandle
591 * @fh - pointer to filehandle
592 *
593 * returns a crc32 hash for the filehandle that is compatible with
594 * the one displayed by "wireshark".
595 */
596static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh)
597{
598 return ~crc32_le(0xFFFFFFFF, &fh->data[0], fh->size);
599}
600#else
601static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh)
602{
603 return 0;
604}
605#endif
Linux kernel - Deliverables
This page took 0.58187 seconds and 5 git commands to generate.