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> |
f7b422b1 | 8 | |
08734048 DH |
9 | #define NFS_MS_MASK (MS_RDONLY|MS_NOSUID|MS_NODEV|MS_NOEXEC|MS_SYNCHRONOUS) |
10 | ||
54ceac45 | 11 | struct nfs_string; |
54ceac45 DH |
12 | |
13 | /* Maximum number of readahead requests | |
14 | * FIXME: this should really be a sysctl so that users may tune it to suit | |
15 | * their needs. People that do NFS over a slow network, might for | |
16 | * instance want to reduce it to something closer to 1 for improved | |
17 | * interactive response. | |
18 | */ | |
19 | #define NFS_MAX_READAHEAD (RPC_DEF_SLOT_TABLE - 1) | |
20 | ||
7ebb9315 BS |
21 | static 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 | ||
533eb461 AA |
27 | static 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 | ||
f7b422b1 DH |
38 | struct 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; | |
6677d095 CL |
45 | struct sockaddr *addr; |
46 | size_t addrlen; | |
f7b422b1 DH |
47 | rpc_authflavor_t authflavor; |
48 | }; | |
49 | ||
a14017db CL |
50 | /* |
51 | * Note: RFC 1813 doesn't limit the number of auth flavors that | |
52 | * a server can return, so make something up. | |
53 | */ | |
54 | #define NFS_MAX_SECFLAVORS (12) | |
55 | ||
4cfd74fc CL |
56 | /* |
57 | * Value used if the user did not specify a port value. | |
58 | */ | |
59 | #define NFS_UNSPEC_PORT (-1) | |
60 | ||
56e4ebf8 BS |
61 | /* |
62 | * Maximum number of pages that readdir can use for creating | |
63 | * a vmapped array of pages. | |
64 | */ | |
65 | #define NFS_MAX_READDIR_PAGES 8 | |
66 | ||
fcf10398 BS |
67 | struct nfs_client_initdata { |
68 | unsigned long init_flags; | |
69 | const char *hostname; | |
70 | const struct sockaddr *addr; | |
71 | size_t addrlen; | |
ab7017a3 | 72 | struct nfs_subversion *nfs_mod; |
fcf10398 BS |
73 | int proto; |
74 | u32 minorversion; | |
75 | struct net *net; | |
76 | }; | |
77 | ||
6b18eaa0 TT |
78 | /* |
79 | * In-kernel mount arguments | |
80 | */ | |
81 | struct nfs_parsed_mount_data { | |
82 | int flags; | |
8cb7f74e CL |
83 | unsigned int rsize, wsize; |
84 | unsigned int timeo, retrans; | |
85 | unsigned int acregmin, acregmax, | |
6b18eaa0 | 86 | acdirmin, acdirmax; |
8cb7f74e | 87 | unsigned int namlen; |
b797cac7 | 88 | unsigned int options; |
6b18eaa0 TT |
89 | unsigned int bsize; |
90 | unsigned int auth_flavor_len; | |
91 | rpc_authflavor_t auth_flavors[1]; | |
92 | char *client_address; | |
764302cc | 93 | unsigned int version; |
3fd5be9e | 94 | unsigned int minorversion; |
08734048 | 95 | char *fscache_uniq; |
b72e4f42 | 96 | bool need_mount; |
6b18eaa0 TT |
97 | |
98 | struct { | |
4c568017 CL |
99 | struct sockaddr_storage address; |
100 | size_t addrlen; | |
6b18eaa0 | 101 | char *hostname; |
78fa701f | 102 | u32 version; |
4cfd74fc | 103 | int port; |
78fa701f | 104 | unsigned short protocol; |
6b18eaa0 TT |
105 | } mount_server; |
106 | ||
107 | struct { | |
4c568017 CL |
108 | struct sockaddr_storage address; |
109 | size_t addrlen; | |
6b18eaa0 TT |
110 | char *hostname; |
111 | char *export_path; | |
4cfd74fc | 112 | int port; |
78fa701f | 113 | unsigned short protocol; |
6b18eaa0 | 114 | } nfs_server; |
f9c3a380 EP |
115 | |
116 | struct security_mnt_opts lsm_opts; | |
e50a7a1a | 117 | struct net *net; |
6b18eaa0 TT |
118 | }; |
119 | ||
146ec944 | 120 | /* mount_clnt.c */ |
c5d120f8 CL |
121 | struct 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; | |
50a737f8 | 129 | int noresvport; |
8e02f6b9 CL |
130 | unsigned int *auth_flav_len; |
131 | rpc_authflavor_t *auth_flavs; | |
6d59b8d5 | 132 | struct net *net; |
c5d120f8 CL |
133 | }; |
134 | ||
fbdefd64 BS |
135 | struct 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 | ||
c5d120f8 | 143 | extern int nfs_mount(struct nfs_mount_request *info); |
0b524123 | 144 | extern void nfs_umount(const struct nfs_mount_request *info); |
146ec944 | 145 | |
24c8dbbb | 146 | /* client.c */ |
a613fa16 | 147 | extern const struct rpc_program nfs_program; |
6b13168b | 148 | extern void nfs_clients_init(struct net *net); |
6663ee7f | 149 | extern struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *); |
428360d7 | 150 | int nfs_create_rpc_client(struct nfs_client *, const struct rpc_timeout *, rpc_authflavor_t); |
fcf10398 BS |
151 | struct nfs_client *nfs_get_client(const struct nfs_client_initdata *, |
152 | const struct rpc_timeout *, const char *, | |
153 | rpc_authflavor_t); | |
154 | int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *, struct nfs_fattr *); | |
155 | void nfs_server_insert_lists(struct nfs_server *); | |
156 | void nfs_init_timeout_values(struct rpc_timeout *, int, unsigned int, unsigned int); | |
157 | int nfs_init_server_rpcclient(struct nfs_server *, const struct rpc_timeout *t, | |
158 | rpc_authflavor_t); | |
159 | struct nfs_server *nfs_alloc_server(void); | |
160 | void nfs_server_copy_userdata(struct nfs_server *, struct nfs_server *); | |
54ceac45 | 161 | |
28cd1b3f | 162 | extern void nfs_cleanup_cb_ident_idr(struct net *); |
24c8dbbb | 163 | extern void nfs_put_client(struct nfs_client *); |
cdb7eced | 164 | extern void nfs_free_client(struct nfs_client *); |
28cd1b3f | 165 | extern struct nfs_client *nfs4_find_client_ident(struct net *, int); |
c36fca52 | 166 | extern struct nfs_client * |
c7add9a9 | 167 | nfs4_find_client_sessionid(struct net *, const struct sockaddr *, |
459de2ed | 168 | struct nfs4_sessionid *, u32); |
1179acc6 | 169 | extern struct nfs_server *nfs_create_server(struct nfs_mount_info *, |
ab7017a3 | 170 | struct nfs_subversion *); |
91ea40b9 | 171 | extern struct nfs_server *nfs4_create_server( |
1179acc6 BS |
172 | struct nfs_mount_info *, |
173 | struct nfs_subversion *); | |
54ceac45 DH |
174 | extern struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *, |
175 | struct nfs_fh *); | |
176 | extern void nfs_free_server(struct nfs_server *server); | |
177 | extern struct nfs_server *nfs_clone_server(struct nfs_server *, | |
178 | struct nfs_fh *, | |
7e6eb683 BS |
179 | struct nfs_fattr *, |
180 | rpc_authflavor_t); | |
4697bd5e | 181 | extern int nfs_wait_client_init_complete(const struct nfs_client *clp); |
76db6d95 | 182 | extern void nfs_mark_client_ready(struct nfs_client *clp, int state); |
d83217c1 AA |
183 | extern struct nfs_client *nfs4_set_ds_client(struct nfs_client* mds_clp, |
184 | const struct sockaddr *ds_addr, | |
98fc685a AA |
185 | int ds_addrlen, int ds_proto, |
186 | unsigned int ds_timeo, | |
187 | unsigned int ds_retrans); | |
6aaca566 DH |
188 | #ifdef CONFIG_PROC_FS |
189 | extern int __init nfs_fs_proc_init(void); | |
190 | extern void nfs_fs_proc_exit(void); | |
191 | #else | |
192 | static inline int nfs_fs_proc_init(void) | |
193 | { | |
194 | return 0; | |
195 | } | |
196 | static inline void nfs_fs_proc_exit(void) | |
197 | { | |
198 | } | |
199 | #endif | |
24c8dbbb | 200 | |
fcf10398 BS |
201 | #ifdef CONFIG_NFS_V4_1 |
202 | int nfs_sockaddr_match_ipaddr(const struct sockaddr *, const struct sockaddr *); | |
203 | #endif | |
204 | ||
1179acc6 | 205 | /* nfs3client.c */ |
1c606fb7 | 206 | #if IS_ENABLED(CONFIG_NFS_V3) |
1179acc6 BS |
207 | struct nfs_server *nfs3_create_server(struct nfs_mount_info *, struct nfs_subversion *); |
208 | struct nfs_server *nfs3_clone_server(struct nfs_server *, struct nfs_fh *, | |
209 | struct nfs_fattr *, rpc_authflavor_t); | |
210 | #endif | |
211 | ||
f7b422b1 DH |
212 | /* callback_xdr.c */ |
213 | extern struct svc_version nfs4_callback_version1; | |
07bccc2d | 214 | extern struct svc_version nfs4_callback_version4; |
f7b422b1 | 215 | |
4db6e0b7 | 216 | struct nfs_pageio_descriptor; |
f7b422b1 DH |
217 | /* pagelist.c */ |
218 | extern int __init nfs_init_nfspagecache(void); | |
266bee88 | 219 | extern void nfs_destroy_nfspagecache(void); |
f7b422b1 | 220 | extern int __init nfs_init_readpagecache(void); |
266bee88 | 221 | extern void nfs_destroy_readpagecache(void); |
f7b422b1 | 222 | extern int __init nfs_init_writepagecache(void); |
266bee88 | 223 | extern void nfs_destroy_writepagecache(void); |
f7b422b1 | 224 | |
f7b422b1 | 225 | extern int __init nfs_init_directcache(void); |
266bee88 | 226 | extern void nfs_destroy_directcache(void); |
30dd374f | 227 | extern bool nfs_pgarray_set(struct nfs_page_array *p, unsigned int pagecount); |
4db6e0b7 FI |
228 | extern void nfs_pgheader_init(struct nfs_pageio_descriptor *desc, |
229 | struct nfs_pgio_header *hdr, | |
230 | void (*release)(struct nfs_pgio_header *hdr)); | |
231 | void nfs_set_pgio_error(struct nfs_pgio_header *hdr, int error, loff_t pos); | |
577b4232 TM |
232 | int nfs_iocounter_wait(struct nfs_io_counter *c); |
233 | ||
234 | static inline void nfs_iocounter_init(struct nfs_io_counter *c) | |
235 | { | |
236 | c->flags = 0; | |
237 | atomic_set(&c->io_count, 0); | |
238 | } | |
f7b422b1 DH |
239 | |
240 | /* nfs2xdr.c */ | |
241 | extern struct rpc_procinfo nfs_procedures[]; | |
573c4e1e CL |
242 | extern int nfs2_decode_dirent(struct xdr_stream *, |
243 | struct nfs_entry *, int); | |
f7b422b1 DH |
244 | |
245 | /* nfs3xdr.c */ | |
246 | extern struct rpc_procinfo nfs3_procedures[]; | |
573c4e1e CL |
247 | extern int nfs3_decode_dirent(struct xdr_stream *, |
248 | struct nfs_entry *, int); | |
f7b422b1 DH |
249 | |
250 | /* nfs4xdr.c */ | |
89d77c8f | 251 | #if IS_ENABLED(CONFIG_NFS_V4) |
573c4e1e CL |
252 | extern int nfs4_decode_dirent(struct xdr_stream *, |
253 | struct nfs_entry *, int); | |
7d4e2747 | 254 | #endif |
2449ea2e AB |
255 | #ifdef CONFIG_NFS_V4_1 |
256 | extern const u32 nfs41_maxread_overhead; | |
257 | extern const u32 nfs41_maxwrite_overhead; | |
f1c097be | 258 | extern const u32 nfs41_maxgetdevinfo_overhead; |
2449ea2e | 259 | #endif |
f7b422b1 DH |
260 | |
261 | /* nfs4proc.c */ | |
89d77c8f | 262 | #if IS_ENABLED(CONFIG_NFS_V4) |
f7b422b1 | 263 | extern struct rpc_procinfo nfs4_procedures[]; |
d75d5414 | 264 | #endif |
f7b422b1 | 265 | |
7fe5c398 TM |
266 | /* proc.c */ |
267 | void nfs_close_context(struct nfs_open_context *ctx, int is_sync); | |
8cab4c39 | 268 | extern struct nfs_client *nfs_init_client(struct nfs_client *clp, |
45a52a02 | 269 | const struct rpc_timeout *timeparms, |
4bf590e0 | 270 | const char *ip_addr, rpc_authflavor_t authflavour); |
7fe5c398 | 271 | |
979df72e | 272 | /* dir.c */ |
7f8275d0 | 273 | extern int nfs_access_cache_shrinker(struct shrinker *shrink, |
1495f230 | 274 | struct shrink_control *sc); |
597d9289 BS |
275 | struct dentry *nfs_lookup(struct inode *, struct dentry *, unsigned int); |
276 | int nfs_create(struct inode *, struct dentry *, umode_t, bool); | |
277 | int nfs_mkdir(struct inode *, struct dentry *, umode_t); | |
278 | int nfs_rmdir(struct inode *, struct dentry *); | |
279 | int nfs_unlink(struct inode *, struct dentry *); | |
280 | int nfs_symlink(struct inode *, struct dentry *, const char *); | |
281 | int nfs_link(struct dentry *, struct inode *, struct dentry *); | |
282 | int nfs_mknod(struct inode *, struct dentry *, umode_t, dev_t); | |
283 | int nfs_rename(struct inode *, struct dentry *, struct inode *, struct dentry *); | |
979df72e | 284 | |
ce4ef7c0 BS |
285 | /* file.c */ |
286 | int nfs_file_fsync_commit(struct file *, loff_t, loff_t, int); | |
287 | loff_t nfs_file_llseek(struct file *, loff_t, int); | |
288 | int nfs_file_flush(struct file *, fl_owner_t); | |
289 | ssize_t nfs_file_read(struct kiocb *, const struct iovec *, unsigned long, loff_t); | |
290 | ssize_t nfs_file_splice_read(struct file *, loff_t *, struct pipe_inode_info *, | |
291 | size_t, unsigned int); | |
292 | int nfs_file_mmap(struct file *, struct vm_area_struct *); | |
293 | ssize_t nfs_file_write(struct kiocb *, const struct iovec *, unsigned long, loff_t); | |
294 | int nfs_file_release(struct inode *, struct file *); | |
295 | int nfs_lock(struct file *, int, struct file_lock *); | |
296 | int nfs_flock(struct file *, int, struct file_lock *); | |
297 | ssize_t nfs_file_splice_write(struct pipe_inode_info *, struct file *, loff_t *, | |
298 | size_t, unsigned int); | |
299 | int nfs_check_flags(int); | |
300 | int nfs_setlease(struct file *, long, struct file_lock **); | |
301 | ||
f7b422b1 | 302 | /* inode.c */ |
5746006f | 303 | extern struct workqueue_struct *nfsiod_workqueue; |
f7b422b1 DH |
304 | extern struct inode *nfs_alloc_inode(struct super_block *sb); |
305 | extern void nfs_destroy_inode(struct inode *); | |
a9185b41 | 306 | extern int nfs_write_inode(struct inode *, struct writeback_control *); |
eed99357 | 307 | extern int nfs_drop_inode(struct inode *); |
19d87ca3 | 308 | extern void nfs_clear_inode(struct inode *); |
b57922d9 | 309 | extern void nfs_evict_inode(struct inode *); |
f41f7418 | 310 | void nfs_zap_acl_cache(struct inode *inode); |
72cb77f4 | 311 | extern int nfs_wait_bit_killable(void *word); |
f7b422b1 DH |
312 | |
313 | /* super.c */ | |
6a74490d | 314 | extern const struct super_operations nfs_sops; |
ab7017a3 | 315 | extern struct file_system_type nfs_fs_type; |
54ceac45 | 316 | extern struct file_system_type nfs_xdev_fs_type; |
89d77c8f | 317 | #if IS_ENABLED(CONFIG_NFS_V4) |
54ceac45 DH |
318 | extern struct file_system_type nfs4_xdev_fs_type; |
319 | extern struct file_system_type nfs4_referral_fs_type; | |
f7b422b1 | 320 | #endif |
ff9099f2 BS |
321 | struct dentry *nfs_try_mount(int, const char *, struct nfs_mount_info *, |
322 | struct nfs_subversion *); | |
fbdefd64 BS |
323 | void nfs_initialise_sb(struct super_block *); |
324 | int nfs_set_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *); | |
325 | int nfs_clone_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *); | |
ab7017a3 BS |
326 | struct dentry *nfs_fs_mount_common(struct nfs_server *, int, const char *, |
327 | struct nfs_mount_info *, struct nfs_subversion *); | |
fbdefd64 BS |
328 | struct dentry *nfs_fs_mount(struct file_system_type *, int, const char *, void *); |
329 | struct dentry * nfs_xdev_mount_common(struct file_system_type *, int, | |
330 | const char *, struct nfs_mount_info *); | |
331 | void nfs_kill_super(struct super_block *); | |
332 | void nfs_fill_super(struct super_block *, struct nfs_mount_info *); | |
4ebd9ab3 | 333 | |
f7b422b1 | 334 | extern struct rpc_stat nfs_rpcstat; |
4ebd9ab3 | 335 | |
f7b422b1 DH |
336 | extern int __init register_nfs_fs(void); |
337 | extern void __exit unregister_nfs_fs(void); | |
1daef0a8 TM |
338 | extern void nfs_sb_active(struct super_block *sb); |
339 | extern void nfs_sb_deactive(struct super_block *sb); | |
f7b422b1 DH |
340 | |
341 | /* namespace.c */ | |
97a54868 | 342 | #define NFS_PATH_CANONICAL 1 |
b514f872 | 343 | extern char *nfs_path(char **p, struct dentry *dentry, |
97a54868 | 344 | char *buffer, ssize_t buflen, unsigned flags); |
36d43a43 | 345 | extern struct vfsmount *nfs_d_automount(struct path *path); |
281cad46 BS |
346 | struct vfsmount *nfs_submount(struct nfs_server *, struct dentry *, |
347 | struct nfs_fh *, struct nfs_fattr *); | |
348 | struct vfsmount *nfs_do_submount(struct dentry *, struct nfs_fh *, | |
349 | struct nfs_fattr *, rpc_authflavor_t); | |
f7b422b1 | 350 | |
54ceac45 | 351 | /* getroot.c */ |
0d5839ad AV |
352 | extern struct dentry *nfs_get_root(struct super_block *, struct nfs_fh *, |
353 | const char *); | |
89d77c8f | 354 | #if IS_ENABLED(CONFIG_NFS_V4) |
0d5839ad AV |
355 | extern struct dentry *nfs4_get_root(struct super_block *, struct nfs_fh *, |
356 | const char *); | |
54ceac45 | 357 | |
815409d2 | 358 | extern int nfs4_get_rootfh(struct nfs_server *server, struct nfs_fh *mntfh); |
7d4e2747 | 359 | #endif |
f7b422b1 | 360 | |
061ae2ed | 361 | struct nfs_pgio_completion_ops; |
f11c88af | 362 | /* read.c */ |
4db6e0b7 | 363 | extern struct nfs_read_header *nfs_readhdr_alloc(void); |
cd841605 | 364 | extern void nfs_readhdr_free(struct nfs_pgio_header *hdr); |
584aa810 FI |
365 | extern void nfs_pageio_init_read(struct nfs_pageio_descriptor *pgio, |
366 | struct inode *inode, | |
367 | const struct nfs_pgio_completion_ops *compl_ops); | |
c5996c4e FI |
368 | extern int nfs_initiate_read(struct rpc_clnt *clnt, |
369 | struct nfs_read_data *data, | |
9f0ec176 | 370 | const struct rpc_call_ops *call_ops, int flags); |
f11c88af | 371 | extern void nfs_read_prepare(struct rpc_task *task, void *calldata); |
493292dd | 372 | extern int nfs_generic_pagein(struct nfs_pageio_descriptor *desc, |
4db6e0b7 | 373 | struct nfs_pgio_header *hdr); |
493292dd TM |
374 | extern void nfs_pageio_reset_read_mds(struct nfs_pageio_descriptor *pgio); |
375 | extern void nfs_readdata_release(struct nfs_read_data *rdata); | |
e885de1a | 376 | |
fbdefd64 BS |
377 | /* super.c */ |
378 | void nfs_clone_super(struct super_block *, struct nfs_mount_info *); | |
379 | void nfs_umount_begin(struct super_block *); | |
380 | int nfs_statfs(struct dentry *, struct kstatfs *); | |
381 | int nfs_show_options(struct seq_file *, struct dentry *); | |
382 | int nfs_show_devname(struct seq_file *, struct dentry *); | |
383 | int nfs_show_path(struct seq_file *, struct dentry *); | |
384 | int nfs_show_stats(struct seq_file *, struct dentry *); | |
385 | void nfs_put_super(struct super_block *); | |
386 | int nfs_remount(struct super_block *sb, int *flags, char *raw_data); | |
387 | ||
def6ed7e | 388 | /* write.c */ |
1763da12 FI |
389 | extern void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio, |
390 | struct inode *inode, int ioflags, | |
391 | const struct nfs_pgio_completion_ops *compl_ops); | |
6c75dc0d | 392 | extern struct nfs_write_header *nfs_writehdr_alloc(void); |
cd841605 | 393 | extern void nfs_writehdr_free(struct nfs_pgio_header *hdr); |
dce81290 | 394 | extern int nfs_generic_flush(struct nfs_pageio_descriptor *desc, |
6c75dc0d | 395 | struct nfs_pgio_header *hdr); |
dce81290 TM |
396 | extern void nfs_pageio_reset_write_mds(struct nfs_pageio_descriptor *pgio); |
397 | extern void nfs_writedata_release(struct nfs_write_data *wdata); | |
0b7c0153 | 398 | extern void nfs_commit_free(struct nfs_commit_data *p); |
c5996c4e FI |
399 | extern int nfs_initiate_write(struct rpc_clnt *clnt, |
400 | struct nfs_write_data *data, | |
a69aef14 | 401 | const struct rpc_call_ops *call_ops, |
9f0ec176 | 402 | int how, int flags); |
def6ed7e | 403 | extern void nfs_write_prepare(struct rpc_task *task, void *calldata); |
0b7c0153 FI |
404 | extern void nfs_commit_prepare(struct rpc_task *task, void *calldata); |
405 | extern int nfs_initiate_commit(struct rpc_clnt *clnt, | |
406 | struct nfs_commit_data *data, | |
e0c2b380 | 407 | const struct rpc_call_ops *call_ops, |
9f0ec176 | 408 | int how, int flags); |
0b7c0153 | 409 | extern void nfs_init_commit(struct nfs_commit_data *data, |
e0c2b380 | 410 | struct list_head *head, |
f453a54a FI |
411 | struct pnfs_layout_segment *lseg, |
412 | struct nfs_commit_info *cinfo); | |
1763da12 FI |
413 | int nfs_scan_commit_list(struct list_head *src, struct list_head *dst, |
414 | struct nfs_commit_info *cinfo, int max); | |
415 | int nfs_scan_commit(struct inode *inode, struct list_head *dst, | |
416 | struct nfs_commit_info *cinfo); | |
417 | void nfs_mark_request_commit(struct nfs_page *req, | |
418 | struct pnfs_layout_segment *lseg, | |
419 | struct nfs_commit_info *cinfo); | |
420 | int nfs_generic_commit_list(struct inode *inode, struct list_head *head, | |
421 | int how, struct nfs_commit_info *cinfo); | |
e0c2b380 | 422 | void nfs_retry_commit(struct list_head *page_list, |
ea2cf228 FI |
423 | struct pnfs_layout_segment *lseg, |
424 | struct nfs_commit_info *cinfo); | |
0b7c0153 | 425 | void nfs_commitdata_release(struct nfs_commit_data *data); |
ea2cf228 FI |
426 | void nfs_request_add_commit_list(struct nfs_page *req, struct list_head *dst, |
427 | struct nfs_commit_info *cinfo); | |
428 | void nfs_request_remove_commit_list(struct nfs_page *req, | |
429 | struct nfs_commit_info *cinfo); | |
430 | void nfs_init_cinfo(struct nfs_commit_info *cinfo, | |
431 | struct inode *inode, | |
432 | struct nfs_direct_req *dreq); | |
e0c2b380 | 433 | |
074cc1de TM |
434 | #ifdef CONFIG_MIGRATION |
435 | extern int nfs_migrate_page(struct address_space *, | |
a6bc32b8 | 436 | struct page *, struct page *, enum migrate_mode); |
074cc1de TM |
437 | #else |
438 | #define nfs_migrate_page NULL | |
439 | #endif | |
def6ed7e | 440 | |
1763da12 FI |
441 | /* direct.c */ |
442 | void nfs_init_cinfo_from_dreq(struct nfs_commit_info *cinfo, | |
443 | struct nfs_direct_req *dreq); | |
1d59d61f TM |
444 | static inline void nfs_inode_dio_wait(struct inode *inode) |
445 | { | |
446 | inode_dio_wait(inode); | |
447 | } | |
6296556f | 448 | extern ssize_t nfs_dreq_bytes_left(struct nfs_direct_req *dreq); |
1763da12 | 449 | |
cccef3b9 | 450 | /* nfs4proc.c */ |
d20581aa | 451 | extern void __nfs4_read_done_cb(struct nfs_read_data *); |
8cab4c39 | 452 | extern struct nfs_client *nfs4_init_client(struct nfs_client *clp, |
45a52a02 AA |
453 | const struct rpc_timeout *timeparms, |
454 | const char *ip_addr, | |
4bf590e0 | 455 | rpc_authflavor_t authflavour); |
05f4c350 CL |
456 | extern int nfs40_walk_client_list(struct nfs_client *clp, |
457 | struct nfs_client **result, | |
458 | struct rpc_cred *cred); | |
459 | extern int nfs41_walk_client_list(struct nfs_client *clp, | |
460 | struct nfs_client **result, | |
461 | struct rpc_cred *cred); | |
cccef3b9 | 462 | |
f7b422b1 DH |
463 | /* |
464 | * Determine the device name as a string | |
465 | */ | |
b514f872 | 466 | static inline char *nfs_devname(struct dentry *dentry, |
54ceac45 | 467 | char *buffer, ssize_t buflen) |
f7b422b1 | 468 | { |
b514f872 | 469 | char *dummy; |
97a54868 | 470 | return nfs_path(&dummy, dentry, buffer, buflen, NFS_PATH_CANONICAL); |
f7b422b1 DH |
471 | } |
472 | ||
473 | /* | |
474 | * Determine the actual block size (and log2 thereof) | |
475 | */ | |
476 | static inline | |
477 | unsigned long nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp) | |
478 | { | |
479 | /* make sure blocksize is a power of two */ | |
480 | if ((bsize & (bsize - 1)) || nrbitsp) { | |
481 | unsigned char nrbits; | |
482 | ||
483 | for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--) | |
484 | ; | |
485 | bsize = 1 << nrbits; | |
486 | if (nrbitsp) | |
487 | *nrbitsp = nrbits; | |
488 | } | |
489 | ||
490 | return bsize; | |
491 | } | |
492 | ||
493 | /* | |
494 | * Calculate the number of 512byte blocks used. | |
495 | */ | |
9eaa67c6 | 496 | static inline blkcnt_t nfs_calc_block_size(u64 tsize) |
f7b422b1 | 497 | { |
9eaa67c6 | 498 | blkcnt_t used = (tsize + 511) >> 9; |
f7b422b1 DH |
499 | return (used > ULONG_MAX) ? ULONG_MAX : used; |
500 | } | |
501 | ||
502 | /* | |
503 | * Compute and set NFS server blocksize | |
504 | */ | |
505 | static inline | |
506 | unsigned long nfs_block_size(unsigned long bsize, unsigned char *nrbitsp) | |
507 | { | |
508 | if (bsize < NFS_MIN_FILE_IO_SIZE) | |
509 | bsize = NFS_DEF_FILE_IO_SIZE; | |
510 | else if (bsize >= NFS_MAX_FILE_IO_SIZE) | |
511 | bsize = NFS_MAX_FILE_IO_SIZE; | |
512 | ||
513 | return nfs_block_bits(bsize, nrbitsp); | |
514 | } | |
515 | ||
516 | /* | |
517 | * Determine the maximum file size for a superblock | |
518 | */ | |
519 | static inline | |
520 | void nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize) | |
521 | { | |
522 | sb->s_maxbytes = (loff_t)maxfilesize; | |
523 | if (sb->s_maxbytes > MAX_LFS_FILESIZE || sb->s_maxbytes <= 0) | |
524 | sb->s_maxbytes = MAX_LFS_FILESIZE; | |
525 | } | |
49a70f27 TM |
526 | |
527 | /* | |
528 | * Determine the number of bytes of data the page contains | |
529 | */ | |
530 | static inline | |
531 | unsigned int nfs_page_length(struct page *page) | |
532 | { | |
d56b4ddf | 533 | loff_t i_size = i_size_read(page_file_mapping(page)->host); |
49a70f27 TM |
534 | |
535 | if (i_size > 0) { | |
d56b4ddf | 536 | pgoff_t page_index = page_file_index(page); |
49a70f27 | 537 | pgoff_t end_index = (i_size - 1) >> PAGE_CACHE_SHIFT; |
d56b4ddf | 538 | if (page_index < end_index) |
49a70f27 | 539 | return PAGE_CACHE_SIZE; |
d56b4ddf | 540 | if (page_index == end_index) |
49a70f27 TM |
541 | return ((i_size - 1) & ~PAGE_CACHE_MASK) + 1; |
542 | } | |
543 | return 0; | |
544 | } | |
8d5658c9 | 545 | |
0b26a0bf TM |
546 | /* |
547 | * Convert a umode to a dirent->d_type | |
548 | */ | |
549 | static inline | |
550 | unsigned char nfs_umode_to_dtype(umode_t mode) | |
551 | { | |
552 | return (mode >> 12) & 15; | |
553 | } | |
554 | ||
8d5658c9 TM |
555 | /* |
556 | * Determine the number of pages in an array of length 'len' and | |
557 | * with a base offset of 'base' | |
558 | */ | |
559 | static inline | |
560 | unsigned int nfs_page_array_len(unsigned int base, size_t len) | |
561 | { | |
562 | return ((unsigned long)len + (unsigned long)base + | |
563 | PAGE_SIZE - 1) >> PAGE_SHIFT; | |
564 | } | |
0110ee15 | 565 | |
3a1556e8 TM |
566 | /* |
567 | * Convert a struct timespec into a 64-bit change attribute | |
568 | * | |
569 | * This does approximately the same thing as timespec_to_ns(), | |
570 | * but for calculation efficiency, we multiply the seconds by | |
571 | * 1024*1024*1024. | |
572 | */ | |
573 | static inline | |
574 | u64 nfs_timespec_to_change_attr(const struct timespec *ts) | |
575 | { | |
576 | return ((u64)ts->tv_sec << 30) + ts->tv_nsec; | |
577 | } |