Commit | Line | Data |
---|---|---|
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 | 12 | struct 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 |
22 | static 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 |
28 | static 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 |
39 | struct 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 |
68 | struct 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 | */ | |
82 | struct 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 TT |
90 | unsigned int bsize; |
91 | unsigned int auth_flavor_len; | |
92 | rpc_authflavor_t auth_flavors[1]; | |
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 |
122 | struct 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 |
136 | struct 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 | 144 | extern int nfs_mount(struct nfs_mount_request *info); |
0b524123 | 145 | extern void nfs_umount(const struct nfs_mount_request *info); |
146ec944 | 146 | |
24c8dbbb | 147 | /* client.c */ |
a613fa16 | 148 | extern const struct rpc_program nfs_program; |
6b13168b | 149 | extern void nfs_clients_init(struct net *net); |
6663ee7f | 150 | extern struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *); |
428360d7 | 151 | int nfs_create_rpc_client(struct nfs_client *, const struct rpc_timeout *, rpc_authflavor_t); |
fcf10398 BS |
152 | struct nfs_client *nfs_get_client(const struct nfs_client_initdata *, |
153 | const struct rpc_timeout *, const char *, | |
154 | rpc_authflavor_t); | |
155 | int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *, struct nfs_fattr *); | |
156 | void nfs_server_insert_lists(struct nfs_server *); | |
157 | void nfs_init_timeout_values(struct rpc_timeout *, int, unsigned int, unsigned int); | |
158 | int nfs_init_server_rpcclient(struct nfs_server *, const struct rpc_timeout *t, | |
159 | rpc_authflavor_t); | |
160 | struct nfs_server *nfs_alloc_server(void); | |
161 | void nfs_server_copy_userdata(struct nfs_server *, struct nfs_server *); | |
54ceac45 | 162 | |
28cd1b3f | 163 | extern void nfs_cleanup_cb_ident_idr(struct net *); |
24c8dbbb | 164 | extern void nfs_put_client(struct nfs_client *); |
cdb7eced | 165 | extern void nfs_free_client(struct nfs_client *); |
28cd1b3f | 166 | extern struct nfs_client *nfs4_find_client_ident(struct net *, int); |
c36fca52 | 167 | extern struct nfs_client * |
c7add9a9 | 168 | nfs4_find_client_sessionid(struct net *, const struct sockaddr *, |
459de2ed | 169 | struct nfs4_sessionid *, u32); |
1179acc6 | 170 | extern struct nfs_server *nfs_create_server(struct nfs_mount_info *, |
ab7017a3 | 171 | struct nfs_subversion *); |
91ea40b9 | 172 | extern struct nfs_server *nfs4_create_server( |
1179acc6 BS |
173 | struct nfs_mount_info *, |
174 | struct nfs_subversion *); | |
54ceac45 DH |
175 | extern struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *, |
176 | struct nfs_fh *); | |
177 | extern void nfs_free_server(struct nfs_server *server); | |
178 | extern struct nfs_server *nfs_clone_server(struct nfs_server *, | |
179 | struct nfs_fh *, | |
7e6eb683 BS |
180 | struct nfs_fattr *, |
181 | rpc_authflavor_t); | |
4697bd5e | 182 | extern int nfs_wait_client_init_complete(const struct nfs_client *clp); |
76db6d95 | 183 | extern void nfs_mark_client_ready(struct nfs_client *clp, int state); |
d83217c1 AA |
184 | extern struct nfs_client *nfs4_set_ds_client(struct nfs_client* mds_clp, |
185 | const struct sockaddr *ds_addr, | |
98fc685a AA |
186 | int ds_addrlen, int ds_proto, |
187 | unsigned int ds_timeo, | |
188 | unsigned int ds_retrans); | |
0e20162e AA |
189 | extern struct rpc_clnt *nfs4_find_or_create_ds_client(struct nfs_client *, |
190 | struct inode *); | |
6aaca566 DH |
191 | #ifdef CONFIG_PROC_FS |
192 | extern int __init nfs_fs_proc_init(void); | |
193 | extern void nfs_fs_proc_exit(void); | |
194 | #else | |
195 | static inline int nfs_fs_proc_init(void) | |
196 | { | |
197 | return 0; | |
198 | } | |
199 | static inline void nfs_fs_proc_exit(void) | |
200 | { | |
201 | } | |
202 | #endif | |
24c8dbbb | 203 | |
fcf10398 BS |
204 | #ifdef CONFIG_NFS_V4_1 |
205 | int nfs_sockaddr_match_ipaddr(const struct sockaddr *, const struct sockaddr *); | |
206 | #endif | |
207 | ||
1179acc6 | 208 | /* nfs3client.c */ |
1c606fb7 | 209 | #if IS_ENABLED(CONFIG_NFS_V3) |
1179acc6 BS |
210 | struct nfs_server *nfs3_create_server(struct nfs_mount_info *, struct nfs_subversion *); |
211 | struct nfs_server *nfs3_clone_server(struct nfs_server *, struct nfs_fh *, | |
212 | struct nfs_fattr *, rpc_authflavor_t); | |
213 | #endif | |
214 | ||
f7b422b1 DH |
215 | /* callback_xdr.c */ |
216 | extern struct svc_version nfs4_callback_version1; | |
07bccc2d | 217 | extern struct svc_version nfs4_callback_version4; |
f7b422b1 | 218 | |
4db6e0b7 | 219 | struct nfs_pageio_descriptor; |
f7b422b1 DH |
220 | /* pagelist.c */ |
221 | extern int __init nfs_init_nfspagecache(void); | |
266bee88 | 222 | extern void nfs_destroy_nfspagecache(void); |
f7b422b1 | 223 | extern int __init nfs_init_readpagecache(void); |
266bee88 | 224 | extern void nfs_destroy_readpagecache(void); |
f7b422b1 | 225 | extern int __init nfs_init_writepagecache(void); |
266bee88 | 226 | extern void nfs_destroy_writepagecache(void); |
f7b422b1 | 227 | |
f7b422b1 | 228 | extern int __init nfs_init_directcache(void); |
266bee88 | 229 | extern void nfs_destroy_directcache(void); |
30dd374f | 230 | extern bool nfs_pgarray_set(struct nfs_page_array *p, unsigned int pagecount); |
4db6e0b7 FI |
231 | extern void nfs_pgheader_init(struct nfs_pageio_descriptor *desc, |
232 | struct nfs_pgio_header *hdr, | |
233 | void (*release)(struct nfs_pgio_header *hdr)); | |
234 | void nfs_set_pgio_error(struct nfs_pgio_header *hdr, int error, loff_t pos); | |
577b4232 TM |
235 | int nfs_iocounter_wait(struct nfs_io_counter *c); |
236 | ||
237 | static inline void nfs_iocounter_init(struct nfs_io_counter *c) | |
238 | { | |
239 | c->flags = 0; | |
240 | atomic_set(&c->io_count, 0); | |
241 | } | |
f7b422b1 DH |
242 | |
243 | /* nfs2xdr.c */ | |
244 | extern struct rpc_procinfo nfs_procedures[]; | |
573c4e1e CL |
245 | extern int nfs2_decode_dirent(struct xdr_stream *, |
246 | struct nfs_entry *, int); | |
f7b422b1 DH |
247 | |
248 | /* nfs3xdr.c */ | |
249 | extern struct rpc_procinfo nfs3_procedures[]; | |
573c4e1e CL |
250 | extern int nfs3_decode_dirent(struct xdr_stream *, |
251 | struct nfs_entry *, int); | |
f7b422b1 DH |
252 | |
253 | /* nfs4xdr.c */ | |
89d77c8f | 254 | #if IS_ENABLED(CONFIG_NFS_V4) |
573c4e1e CL |
255 | extern int nfs4_decode_dirent(struct xdr_stream *, |
256 | struct nfs_entry *, int); | |
7d4e2747 | 257 | #endif |
2449ea2e AB |
258 | #ifdef CONFIG_NFS_V4_1 |
259 | extern const u32 nfs41_maxread_overhead; | |
260 | extern const u32 nfs41_maxwrite_overhead; | |
f1c097be | 261 | extern const u32 nfs41_maxgetdevinfo_overhead; |
2449ea2e | 262 | #endif |
f7b422b1 DH |
263 | |
264 | /* nfs4proc.c */ | |
89d77c8f | 265 | #if IS_ENABLED(CONFIG_NFS_V4) |
f7b422b1 | 266 | extern struct rpc_procinfo nfs4_procedures[]; |
d75d5414 | 267 | #endif |
f7b422b1 | 268 | |
7fe5c398 TM |
269 | /* proc.c */ |
270 | void nfs_close_context(struct nfs_open_context *ctx, int is_sync); | |
8cab4c39 | 271 | extern struct nfs_client *nfs_init_client(struct nfs_client *clp, |
45a52a02 | 272 | const struct rpc_timeout *timeparms, |
f8407299 | 273 | const char *ip_addr); |
7fe5c398 | 274 | |
979df72e | 275 | /* dir.c */ |
1ab6c499 DC |
276 | extern unsigned long nfs_access_cache_count(struct shrinker *shrink, |
277 | struct shrink_control *sc); | |
278 | extern unsigned long nfs_access_cache_scan(struct shrinker *shrink, | |
279 | struct shrink_control *sc); | |
597d9289 BS |
280 | struct dentry *nfs_lookup(struct inode *, struct dentry *, unsigned int); |
281 | int nfs_create(struct inode *, struct dentry *, umode_t, bool); | |
282 | int nfs_mkdir(struct inode *, struct dentry *, umode_t); | |
283 | int nfs_rmdir(struct inode *, struct dentry *); | |
284 | int nfs_unlink(struct inode *, struct dentry *); | |
285 | int nfs_symlink(struct inode *, struct dentry *, const char *); | |
286 | int nfs_link(struct dentry *, struct inode *, struct dentry *); | |
287 | int nfs_mknod(struct inode *, struct dentry *, umode_t, dev_t); | |
288 | int nfs_rename(struct inode *, struct dentry *, struct inode *, struct dentry *); | |
979df72e | 289 | |
ce4ef7c0 BS |
290 | /* file.c */ |
291 | int nfs_file_fsync_commit(struct file *, loff_t, loff_t, int); | |
292 | loff_t nfs_file_llseek(struct file *, loff_t, int); | |
293 | int nfs_file_flush(struct file *, fl_owner_t); | |
294 | ssize_t nfs_file_read(struct kiocb *, const struct iovec *, unsigned long, loff_t); | |
295 | ssize_t nfs_file_splice_read(struct file *, loff_t *, struct pipe_inode_info *, | |
296 | size_t, unsigned int); | |
297 | int nfs_file_mmap(struct file *, struct vm_area_struct *); | |
298 | ssize_t nfs_file_write(struct kiocb *, const struct iovec *, unsigned long, loff_t); | |
299 | int nfs_file_release(struct inode *, struct file *); | |
300 | int nfs_lock(struct file *, int, struct file_lock *); | |
301 | int nfs_flock(struct file *, int, struct file_lock *); | |
302 | ssize_t nfs_file_splice_write(struct pipe_inode_info *, struct file *, loff_t *, | |
303 | size_t, unsigned int); | |
304 | int nfs_check_flags(int); | |
305 | int nfs_setlease(struct file *, long, struct file_lock **); | |
306 | ||
f7b422b1 | 307 | /* inode.c */ |
5746006f | 308 | extern struct workqueue_struct *nfsiod_workqueue; |
f7b422b1 DH |
309 | extern struct inode *nfs_alloc_inode(struct super_block *sb); |
310 | extern void nfs_destroy_inode(struct inode *); | |
a9185b41 | 311 | extern int nfs_write_inode(struct inode *, struct writeback_control *); |
eed99357 | 312 | extern int nfs_drop_inode(struct inode *); |
19d87ca3 | 313 | extern void nfs_clear_inode(struct inode *); |
b57922d9 | 314 | extern void nfs_evict_inode(struct inode *); |
f41f7418 | 315 | void nfs_zap_acl_cache(struct inode *inode); |
72cb77f4 | 316 | extern int nfs_wait_bit_killable(void *word); |
f7b422b1 DH |
317 | |
318 | /* super.c */ | |
6a74490d | 319 | extern const struct super_operations nfs_sops; |
ab7017a3 | 320 | extern struct file_system_type nfs_fs_type; |
54ceac45 | 321 | extern struct file_system_type nfs_xdev_fs_type; |
89d77c8f | 322 | #if IS_ENABLED(CONFIG_NFS_V4) |
54ceac45 DH |
323 | extern struct file_system_type nfs4_xdev_fs_type; |
324 | extern struct file_system_type nfs4_referral_fs_type; | |
f7b422b1 | 325 | #endif |
ff9099f2 BS |
326 | struct dentry *nfs_try_mount(int, const char *, struct nfs_mount_info *, |
327 | struct nfs_subversion *); | |
fbdefd64 BS |
328 | void nfs_initialise_sb(struct super_block *); |
329 | int nfs_set_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *); | |
330 | int nfs_clone_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *); | |
ab7017a3 BS |
331 | struct dentry *nfs_fs_mount_common(struct nfs_server *, int, const char *, |
332 | struct nfs_mount_info *, struct nfs_subversion *); | |
fbdefd64 BS |
333 | struct dentry *nfs_fs_mount(struct file_system_type *, int, const char *, void *); |
334 | struct dentry * nfs_xdev_mount_common(struct file_system_type *, int, | |
335 | const char *, struct nfs_mount_info *); | |
336 | void nfs_kill_super(struct super_block *); | |
337 | void nfs_fill_super(struct super_block *, struct nfs_mount_info *); | |
4ebd9ab3 | 338 | |
f7b422b1 | 339 | extern struct rpc_stat nfs_rpcstat; |
4ebd9ab3 | 340 | |
f7b422b1 DH |
341 | extern int __init register_nfs_fs(void); |
342 | extern void __exit unregister_nfs_fs(void); | |
1daef0a8 TM |
343 | extern void nfs_sb_active(struct super_block *sb); |
344 | extern void nfs_sb_deactive(struct super_block *sb); | |
f7b422b1 DH |
345 | |
346 | /* namespace.c */ | |
97a54868 | 347 | #define NFS_PATH_CANONICAL 1 |
b514f872 | 348 | extern char *nfs_path(char **p, struct dentry *dentry, |
97a54868 | 349 | char *buffer, ssize_t buflen, unsigned flags); |
36d43a43 | 350 | extern struct vfsmount *nfs_d_automount(struct path *path); |
281cad46 BS |
351 | struct vfsmount *nfs_submount(struct nfs_server *, struct dentry *, |
352 | struct nfs_fh *, struct nfs_fattr *); | |
353 | struct vfsmount *nfs_do_submount(struct dentry *, struct nfs_fh *, | |
354 | struct nfs_fattr *, rpc_authflavor_t); | |
f7b422b1 | 355 | |
54ceac45 | 356 | /* getroot.c */ |
0d5839ad AV |
357 | extern struct dentry *nfs_get_root(struct super_block *, struct nfs_fh *, |
358 | const char *); | |
89d77c8f | 359 | #if IS_ENABLED(CONFIG_NFS_V4) |
0d5839ad AV |
360 | extern struct dentry *nfs4_get_root(struct super_block *, struct nfs_fh *, |
361 | const char *); | |
54ceac45 | 362 | |
5e6b1990 | 363 | extern int nfs4_get_rootfh(struct nfs_server *server, struct nfs_fh *mntfh, bool); |
7d4e2747 | 364 | #endif |
f7b422b1 | 365 | |
061ae2ed | 366 | struct nfs_pgio_completion_ops; |
f11c88af | 367 | /* read.c */ |
4db6e0b7 | 368 | extern struct nfs_read_header *nfs_readhdr_alloc(void); |
cd841605 | 369 | extern void nfs_readhdr_free(struct nfs_pgio_header *hdr); |
584aa810 FI |
370 | extern void nfs_pageio_init_read(struct nfs_pageio_descriptor *pgio, |
371 | struct inode *inode, | |
372 | const struct nfs_pgio_completion_ops *compl_ops); | |
c5996c4e FI |
373 | extern int nfs_initiate_read(struct rpc_clnt *clnt, |
374 | struct nfs_read_data *data, | |
9f0ec176 | 375 | const struct rpc_call_ops *call_ops, int flags); |
f11c88af | 376 | extern void nfs_read_prepare(struct rpc_task *task, void *calldata); |
493292dd | 377 | extern int nfs_generic_pagein(struct nfs_pageio_descriptor *desc, |
4db6e0b7 | 378 | struct nfs_pgio_header *hdr); |
493292dd TM |
379 | extern void nfs_pageio_reset_read_mds(struct nfs_pageio_descriptor *pgio); |
380 | extern void nfs_readdata_release(struct nfs_read_data *rdata); | |
e885de1a | 381 | |
fbdefd64 BS |
382 | /* super.c */ |
383 | void nfs_clone_super(struct super_block *, struct nfs_mount_info *); | |
384 | void nfs_umount_begin(struct super_block *); | |
385 | int nfs_statfs(struct dentry *, struct kstatfs *); | |
386 | int nfs_show_options(struct seq_file *, struct dentry *); | |
387 | int nfs_show_devname(struct seq_file *, struct dentry *); | |
388 | int nfs_show_path(struct seq_file *, struct dentry *); | |
389 | int nfs_show_stats(struct seq_file *, struct dentry *); | |
390 | void nfs_put_super(struct super_block *); | |
391 | int nfs_remount(struct super_block *sb, int *flags, char *raw_data); | |
392 | ||
def6ed7e | 393 | /* write.c */ |
1763da12 FI |
394 | extern 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); | |
6c75dc0d | 397 | extern struct nfs_write_header *nfs_writehdr_alloc(void); |
cd841605 | 398 | extern void nfs_writehdr_free(struct nfs_pgio_header *hdr); |
dce81290 | 399 | extern int nfs_generic_flush(struct nfs_pageio_descriptor *desc, |
6c75dc0d | 400 | struct nfs_pgio_header *hdr); |
dce81290 TM |
401 | extern void nfs_pageio_reset_write_mds(struct nfs_pageio_descriptor *pgio); |
402 | extern void nfs_writedata_release(struct nfs_write_data *wdata); | |
0b7c0153 | 403 | extern void nfs_commit_free(struct nfs_commit_data *p); |
c5996c4e FI |
404 | extern int nfs_initiate_write(struct rpc_clnt *clnt, |
405 | struct nfs_write_data *data, | |
a69aef14 | 406 | const struct rpc_call_ops *call_ops, |
9f0ec176 | 407 | int how, int flags); |
def6ed7e | 408 | extern void nfs_write_prepare(struct rpc_task *task, void *calldata); |
0b7c0153 FI |
409 | extern void nfs_commit_prepare(struct rpc_task *task, void *calldata); |
410 | extern int nfs_initiate_commit(struct rpc_clnt *clnt, | |
411 | struct nfs_commit_data *data, | |
e0c2b380 | 412 | const struct rpc_call_ops *call_ops, |
9f0ec176 | 413 | int how, int flags); |
0b7c0153 | 414 | extern void nfs_init_commit(struct nfs_commit_data *data, |
e0c2b380 | 415 | struct list_head *head, |
f453a54a FI |
416 | struct pnfs_layout_segment *lseg, |
417 | struct nfs_commit_info *cinfo); | |
1763da12 FI |
418 | int nfs_scan_commit_list(struct list_head *src, struct list_head *dst, |
419 | struct nfs_commit_info *cinfo, int max); | |
420 | int nfs_scan_commit(struct inode *inode, struct list_head *dst, | |
421 | struct nfs_commit_info *cinfo); | |
422 | void nfs_mark_request_commit(struct nfs_page *req, | |
423 | struct pnfs_layout_segment *lseg, | |
424 | struct nfs_commit_info *cinfo); | |
425 | int nfs_generic_commit_list(struct inode *inode, struct list_head *head, | |
426 | int how, struct nfs_commit_info *cinfo); | |
e0c2b380 | 427 | void nfs_retry_commit(struct list_head *page_list, |
ea2cf228 FI |
428 | struct pnfs_layout_segment *lseg, |
429 | struct nfs_commit_info *cinfo); | |
0b7c0153 | 430 | void nfs_commitdata_release(struct nfs_commit_data *data); |
ea2cf228 FI |
431 | void nfs_request_add_commit_list(struct nfs_page *req, struct list_head *dst, |
432 | struct nfs_commit_info *cinfo); | |
433 | void nfs_request_remove_commit_list(struct nfs_page *req, | |
434 | struct nfs_commit_info *cinfo); | |
435 | void nfs_init_cinfo(struct nfs_commit_info *cinfo, | |
436 | struct inode *inode, | |
437 | struct nfs_direct_req *dreq); | |
dc24826b AA |
438 | int nfs_key_timeout_notify(struct file *filp, struct inode *inode); |
439 | bool nfs_ctx_key_to_expire(struct nfs_open_context *ctx); | |
e0c2b380 | 440 | |
074cc1de TM |
441 | #ifdef CONFIG_MIGRATION |
442 | extern int nfs_migrate_page(struct address_space *, | |
a6bc32b8 | 443 | struct page *, struct page *, enum migrate_mode); |
074cc1de TM |
444 | #else |
445 | #define nfs_migrate_page NULL | |
446 | #endif | |
def6ed7e | 447 | |
1763da12 FI |
448 | /* direct.c */ |
449 | void nfs_init_cinfo_from_dreq(struct nfs_commit_info *cinfo, | |
450 | struct nfs_direct_req *dreq); | |
1d59d61f TM |
451 | static inline void nfs_inode_dio_wait(struct inode *inode) |
452 | { | |
453 | inode_dio_wait(inode); | |
454 | } | |
6296556f | 455 | extern ssize_t nfs_dreq_bytes_left(struct nfs_direct_req *dreq); |
1763da12 | 456 | |
cccef3b9 | 457 | /* nfs4proc.c */ |
d20581aa | 458 | extern void __nfs4_read_done_cb(struct nfs_read_data *); |
8cab4c39 | 459 | extern struct nfs_client *nfs4_init_client(struct nfs_client *clp, |
45a52a02 | 460 | const struct rpc_timeout *timeparms, |
f8407299 | 461 | const char *ip_addr); |
05f4c350 CL |
462 | extern int nfs40_walk_client_list(struct nfs_client *clp, |
463 | struct nfs_client **result, | |
464 | struct rpc_cred *cred); | |
465 | extern int nfs41_walk_client_list(struct nfs_client *clp, | |
466 | struct nfs_client **result, | |
467 | struct rpc_cred *cred); | |
cccef3b9 | 468 | |
f7b422b1 DH |
469 | /* |
470 | * Determine the device name as a string | |
471 | */ | |
b514f872 | 472 | static inline char *nfs_devname(struct dentry *dentry, |
54ceac45 | 473 | char *buffer, ssize_t buflen) |
f7b422b1 | 474 | { |
b514f872 | 475 | char *dummy; |
97a54868 | 476 | return nfs_path(&dummy, dentry, buffer, buflen, NFS_PATH_CANONICAL); |
f7b422b1 DH |
477 | } |
478 | ||
479 | /* | |
480 | * Determine the actual block size (and log2 thereof) | |
481 | */ | |
482 | static inline | |
483 | unsigned long nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp) | |
484 | { | |
485 | /* make sure blocksize is a power of two */ | |
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 | * Calculate the number of 512byte blocks used. | |
501 | */ | |
9eaa67c6 | 502 | static inline blkcnt_t nfs_calc_block_size(u64 tsize) |
f7b422b1 | 503 | { |
9eaa67c6 | 504 | blkcnt_t used = (tsize + 511) >> 9; |
f7b422b1 DH |
505 | return (used > ULONG_MAX) ? ULONG_MAX : used; |
506 | } | |
507 | ||
508 | /* | |
509 | * Compute and set NFS server blocksize | |
510 | */ | |
511 | static inline | |
512 | unsigned 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 | * Determine the maximum file size for a superblock | |
524 | */ | |
525 | static inline | |
526 | void 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 | } | |
49a70f27 TM |
532 | |
533 | /* | |
534 | * Determine the number of bytes of data the page contains | |
535 | */ | |
536 | static inline | |
537 | unsigned int nfs_page_length(struct page *page) | |
538 | { | |
d56b4ddf | 539 | loff_t i_size = i_size_read(page_file_mapping(page)->host); |
49a70f27 TM |
540 | |
541 | if (i_size > 0) { | |
d56b4ddf | 542 | pgoff_t page_index = page_file_index(page); |
49a70f27 | 543 | pgoff_t end_index = (i_size - 1) >> PAGE_CACHE_SHIFT; |
d56b4ddf | 544 | if (page_index < end_index) |
49a70f27 | 545 | return PAGE_CACHE_SIZE; |
d56b4ddf | 546 | if (page_index == end_index) |
49a70f27 TM |
547 | return ((i_size - 1) & ~PAGE_CACHE_MASK) + 1; |
548 | } | |
549 | return 0; | |
550 | } | |
8d5658c9 | 551 | |
0b26a0bf TM |
552 | /* |
553 | * Convert a umode to a dirent->d_type | |
554 | */ | |
555 | static inline | |
556 | unsigned char nfs_umode_to_dtype(umode_t mode) | |
557 | { | |
558 | return (mode >> 12) & 15; | |
559 | } | |
560 | ||
8d5658c9 TM |
561 | /* |
562 | * Determine the number of pages in an array of length 'len' and | |
563 | * with a base offset of 'base' | |
564 | */ | |
565 | static inline | |
566 | unsigned 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 | } | |
0110ee15 | 571 | |
3a1556e8 TM |
572 | /* |
573 | * Convert a struct timespec into a 64-bit change attribute | |
574 | * | |
575 | * This does approximately the same thing as timespec_to_ns(), | |
576 | * but for calculation efficiency, we multiply the seconds by | |
577 | * 1024*1024*1024. | |
578 | */ | |
579 | static inline | |
580 | u64 nfs_timespec_to_change_attr(const struct timespec *ts) | |
581 | { | |
582 | return ((u64)ts->tv_sec << 30) + ts->tv_nsec; | |
583 | } | |
1264a2f0 TM |
584 | |
585 | #ifdef CONFIG_CRC32 | |
586 | /** | |
587 | * nfs_fhandle_hash - calculate the crc32 hash for the filehandle | |
588 | * @fh - pointer to filehandle | |
589 | * | |
590 | * returns a crc32 hash for the filehandle that is compatible with | |
591 | * the one displayed by "wireshark". | |
592 | */ | |
593 | static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh) | |
594 | { | |
595 | return ~crc32_le(0xFFFFFFFF, &fh->data[0], fh->size); | |
596 | } | |
597 | #else | |
598 | static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh) | |
599 | { | |
600 | return 0; | |
601 | } | |
602 | #endif |