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Commit | Line | Data |
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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 | ||
eedc020e AA |
21 | /* |
22 | * Determine if sessions are in use. | |
23 | */ | |
24 | static inline int nfs4_has_session(const struct nfs_client *clp) | |
25 | { | |
26 | #ifdef CONFIG_NFS_V4_1 | |
27 | if (clp->cl_session) | |
28 | return 1; | |
29 | #endif /* CONFIG_NFS_V4_1 */ | |
30 | return 0; | |
31 | } | |
32 | ||
d8cb1a7c AB |
33 | static inline int nfs4_has_persistent_session(const struct nfs_client *clp) |
34 | { | |
35 | #ifdef CONFIG_NFS_V4_1 | |
36 | if (nfs4_has_session(clp)) | |
37 | return (clp->cl_session->flags & SESSION4_PERSIST); | |
38 | #endif /* CONFIG_NFS_V4_1 */ | |
39 | return 0; | |
40 | } | |
41 | ||
7ebb9315 BS |
42 | static inline void nfs_attr_check_mountpoint(struct super_block *parent, struct nfs_fattr *fattr) |
43 | { | |
44 | if (!nfs_fsid_equal(&NFS_SB(parent)->fsid, &fattr->fsid)) | |
45 | fattr->valid |= NFS_ATTR_FATTR_MOUNTPOINT; | |
46 | } | |
47 | ||
533eb461 AA |
48 | static inline int nfs_attr_use_mounted_on_fileid(struct nfs_fattr *fattr) |
49 | { | |
50 | if (((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) == 0) || | |
51 | (((fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT) == 0) && | |
52 | ((fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) == 0))) | |
53 | return 0; | |
54 | ||
55 | fattr->fileid = fattr->mounted_on_fileid; | |
56 | return 1; | |
57 | } | |
58 | ||
f7b422b1 DH |
59 | struct nfs_clone_mount { |
60 | const struct super_block *sb; | |
61 | const struct dentry *dentry; | |
62 | struct nfs_fh *fh; | |
63 | struct nfs_fattr *fattr; | |
64 | char *hostname; | |
65 | char *mnt_path; | |
6677d095 CL |
66 | struct sockaddr *addr; |
67 | size_t addrlen; | |
f7b422b1 DH |
68 | rpc_authflavor_t authflavor; |
69 | }; | |
70 | ||
a14017db CL |
71 | /* |
72 | * Note: RFC 1813 doesn't limit the number of auth flavors that | |
73 | * a server can return, so make something up. | |
74 | */ | |
75 | #define NFS_MAX_SECFLAVORS (12) | |
76 | ||
4cfd74fc CL |
77 | /* |
78 | * Value used if the user did not specify a port value. | |
79 | */ | |
80 | #define NFS_UNSPEC_PORT (-1) | |
81 | ||
56e4ebf8 BS |
82 | /* |
83 | * Maximum number of pages that readdir can use for creating | |
84 | * a vmapped array of pages. | |
85 | */ | |
86 | #define NFS_MAX_READDIR_PAGES 8 | |
87 | ||
6b18eaa0 TT |
88 | /* |
89 | * In-kernel mount arguments | |
90 | */ | |
91 | struct nfs_parsed_mount_data { | |
92 | int flags; | |
93 | int rsize, wsize; | |
94 | int timeo, retrans; | |
95 | int acregmin, acregmax, | |
96 | acdirmin, acdirmax; | |
97 | int namlen; | |
b797cac7 | 98 | unsigned int options; |
6b18eaa0 TT |
99 | unsigned int bsize; |
100 | unsigned int auth_flavor_len; | |
101 | rpc_authflavor_t auth_flavors[1]; | |
102 | char *client_address; | |
764302cc | 103 | unsigned int version; |
3fd5be9e | 104 | unsigned int minorversion; |
08734048 | 105 | char *fscache_uniq; |
6b18eaa0 TT |
106 | |
107 | struct { | |
4c568017 CL |
108 | struct sockaddr_storage address; |
109 | size_t addrlen; | |
6b18eaa0 | 110 | char *hostname; |
78fa701f | 111 | u32 version; |
4cfd74fc | 112 | int port; |
78fa701f | 113 | unsigned short protocol; |
6b18eaa0 TT |
114 | } mount_server; |
115 | ||
116 | struct { | |
4c568017 CL |
117 | struct sockaddr_storage address; |
118 | size_t addrlen; | |
6b18eaa0 TT |
119 | char *hostname; |
120 | char *export_path; | |
4cfd74fc | 121 | int port; |
78fa701f | 122 | unsigned short protocol; |
6b18eaa0 | 123 | } nfs_server; |
f9c3a380 EP |
124 | |
125 | struct security_mnt_opts lsm_opts; | |
e50a7a1a | 126 | struct net *net; |
6b18eaa0 TT |
127 | }; |
128 | ||
146ec944 | 129 | /* mount_clnt.c */ |
c5d120f8 CL |
130 | struct nfs_mount_request { |
131 | struct sockaddr *sap; | |
132 | size_t salen; | |
133 | char *hostname; | |
134 | char *dirpath; | |
135 | u32 version; | |
136 | unsigned short protocol; | |
137 | struct nfs_fh *fh; | |
50a737f8 | 138 | int noresvport; |
8e02f6b9 CL |
139 | unsigned int *auth_flav_len; |
140 | rpc_authflavor_t *auth_flavs; | |
6d59b8d5 | 141 | struct net *net; |
c5d120f8 CL |
142 | }; |
143 | ||
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); |
54ceac45 | 150 | |
28cd1b3f | 151 | extern void nfs_cleanup_cb_ident_idr(struct net *); |
24c8dbbb | 152 | extern void nfs_put_client(struct nfs_client *); |
28cd1b3f | 153 | extern struct nfs_client *nfs4_find_client_ident(struct net *, int); |
c36fca52 | 154 | extern struct nfs_client * |
c7add9a9 SK |
155 | nfs4_find_client_sessionid(struct net *, const struct sockaddr *, |
156 | struct nfs4_sessionid *); | |
2283f8d6 TT |
157 | extern struct nfs_server *nfs_create_server( |
158 | const struct nfs_parsed_mount_data *, | |
159 | struct nfs_fh *); | |
91ea40b9 TT |
160 | extern struct nfs_server *nfs4_create_server( |
161 | const struct nfs_parsed_mount_data *, | |
162 | struct nfs_fh *); | |
54ceac45 DH |
163 | extern struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *, |
164 | struct nfs_fh *); | |
165 | extern void nfs_free_server(struct nfs_server *server); | |
166 | extern struct nfs_server *nfs_clone_server(struct nfs_server *, | |
167 | struct nfs_fh *, | |
7e6eb683 BS |
168 | struct nfs_fattr *, |
169 | rpc_authflavor_t); | |
76db6d95 | 170 | extern void nfs_mark_client_ready(struct nfs_client *clp, int state); |
008f55d0 | 171 | extern int nfs4_check_client_ready(struct nfs_client *clp); |
d83217c1 AA |
172 | extern struct nfs_client *nfs4_set_ds_client(struct nfs_client* mds_clp, |
173 | const struct sockaddr *ds_addr, | |
174 | int ds_addrlen, int ds_proto); | |
6aaca566 DH |
175 | #ifdef CONFIG_PROC_FS |
176 | extern int __init nfs_fs_proc_init(void); | |
177 | extern void nfs_fs_proc_exit(void); | |
178 | #else | |
179 | static inline int nfs_fs_proc_init(void) | |
180 | { | |
181 | return 0; | |
182 | } | |
183 | static inline void nfs_fs_proc_exit(void) | |
184 | { | |
185 | } | |
186 | #endif | |
24c8dbbb | 187 | |
7d4e2747 | 188 | /* nfs4namespace.c */ |
f7b422b1 | 189 | #ifdef CONFIG_NFS_V4 |
f05d147f | 190 | extern struct vfsmount *nfs_do_refmount(struct rpc_clnt *client, struct dentry *dentry); |
f7b422b1 DH |
191 | #else |
192 | static inline | |
f05d147f | 193 | struct vfsmount *nfs_do_refmount(struct rpc_clnt *client, struct dentry *dentry) |
f7b422b1 DH |
194 | { |
195 | return ERR_PTR(-ENOENT); | |
196 | } | |
197 | #endif | |
198 | ||
199 | /* callback_xdr.c */ | |
200 | extern struct svc_version nfs4_callback_version1; | |
07bccc2d | 201 | extern struct svc_version nfs4_callback_version4; |
f7b422b1 | 202 | |
4db6e0b7 | 203 | struct nfs_pageio_descriptor; |
f7b422b1 DH |
204 | /* pagelist.c */ |
205 | extern int __init nfs_init_nfspagecache(void); | |
266bee88 | 206 | extern void nfs_destroy_nfspagecache(void); |
f7b422b1 | 207 | extern int __init nfs_init_readpagecache(void); |
266bee88 | 208 | extern void nfs_destroy_readpagecache(void); |
f7b422b1 | 209 | extern int __init nfs_init_writepagecache(void); |
266bee88 | 210 | extern void nfs_destroy_writepagecache(void); |
f7b422b1 | 211 | |
f7b422b1 | 212 | extern int __init nfs_init_directcache(void); |
266bee88 | 213 | extern void nfs_destroy_directcache(void); |
30dd374f | 214 | extern bool nfs_pgarray_set(struct nfs_page_array *p, unsigned int pagecount); |
4db6e0b7 FI |
215 | extern void nfs_pgheader_init(struct nfs_pageio_descriptor *desc, |
216 | struct nfs_pgio_header *hdr, | |
217 | void (*release)(struct nfs_pgio_header *hdr)); | |
218 | void nfs_set_pgio_error(struct nfs_pgio_header *hdr, int error, loff_t pos); | |
f7b422b1 DH |
219 | |
220 | /* nfs2xdr.c */ | |
85828493 | 221 | extern int nfs_stat_to_errno(enum nfs_stat); |
f7b422b1 | 222 | extern struct rpc_procinfo nfs_procedures[]; |
573c4e1e CL |
223 | extern int nfs2_decode_dirent(struct xdr_stream *, |
224 | struct nfs_entry *, int); | |
f7b422b1 DH |
225 | |
226 | /* nfs3xdr.c */ | |
227 | extern struct rpc_procinfo nfs3_procedures[]; | |
573c4e1e CL |
228 | extern int nfs3_decode_dirent(struct xdr_stream *, |
229 | struct nfs_entry *, int); | |
f7b422b1 DH |
230 | |
231 | /* nfs4xdr.c */ | |
7d4e2747 | 232 | #ifdef CONFIG_NFS_V4 |
573c4e1e CL |
233 | extern int nfs4_decode_dirent(struct xdr_stream *, |
234 | struct nfs_entry *, int); | |
7d4e2747 | 235 | #endif |
2449ea2e AB |
236 | #ifdef CONFIG_NFS_V4_1 |
237 | extern const u32 nfs41_maxread_overhead; | |
238 | extern const u32 nfs41_maxwrite_overhead; | |
239 | #endif | |
f7b422b1 DH |
240 | |
241 | /* nfs4proc.c */ | |
d75d5414 | 242 | #ifdef CONFIG_NFS_V4 |
f7b422b1 | 243 | extern struct rpc_procinfo nfs4_procedures[]; |
d75d5414 | 244 | #endif |
f7b422b1 | 245 | |
d83217c1 AA |
246 | extern int nfs4_init_ds_session(struct nfs_client *clp); |
247 | ||
7fe5c398 TM |
248 | /* proc.c */ |
249 | void nfs_close_context(struct nfs_open_context *ctx, int is_sync); | |
45a52a02 AA |
250 | extern int nfs_init_client(struct nfs_client *clp, |
251 | const struct rpc_timeout *timeparms, | |
252 | const char *ip_addr, rpc_authflavor_t authflavour, | |
253 | int noresvport); | |
7fe5c398 | 254 | |
979df72e | 255 | /* dir.c */ |
7f8275d0 | 256 | extern int nfs_access_cache_shrinker(struct shrinker *shrink, |
1495f230 | 257 | struct shrink_control *sc); |
979df72e | 258 | |
f7b422b1 | 259 | /* inode.c */ |
5746006f | 260 | extern struct workqueue_struct *nfsiod_workqueue; |
f7b422b1 DH |
261 | extern struct inode *nfs_alloc_inode(struct super_block *sb); |
262 | extern void nfs_destroy_inode(struct inode *); | |
a9185b41 | 263 | extern int nfs_write_inode(struct inode *, struct writeback_control *); |
b57922d9 | 264 | extern void nfs_evict_inode(struct inode *); |
f7b422b1 | 265 | #ifdef CONFIG_NFS_V4 |
b57922d9 | 266 | extern void nfs4_evict_inode(struct inode *); |
f7b422b1 | 267 | #endif |
f41f7418 | 268 | void nfs_zap_acl_cache(struct inode *inode); |
72cb77f4 | 269 | extern int nfs_wait_bit_killable(void *word); |
f7b422b1 DH |
270 | |
271 | /* super.c */ | |
54ceac45 | 272 | extern struct file_system_type nfs_xdev_fs_type; |
f7b422b1 | 273 | #ifdef CONFIG_NFS_V4 |
54ceac45 DH |
274 | extern struct file_system_type nfs4_xdev_fs_type; |
275 | extern struct file_system_type nfs4_referral_fs_type; | |
f7b422b1 | 276 | #endif |
4ebd9ab3 | 277 | |
f7b422b1 | 278 | extern struct rpc_stat nfs_rpcstat; |
4ebd9ab3 | 279 | |
f7b422b1 DH |
280 | extern int __init register_nfs_fs(void); |
281 | extern void __exit unregister_nfs_fs(void); | |
1daef0a8 TM |
282 | extern void nfs_sb_active(struct super_block *sb); |
283 | extern void nfs_sb_deactive(struct super_block *sb); | |
f7b422b1 DH |
284 | |
285 | /* namespace.c */ | |
b514f872 | 286 | extern char *nfs_path(char **p, struct dentry *dentry, |
f7b422b1 | 287 | char *buffer, ssize_t buflen); |
36d43a43 | 288 | extern struct vfsmount *nfs_d_automount(struct path *path); |
f7b422b1 | 289 | |
54ceac45 | 290 | /* getroot.c */ |
0d5839ad AV |
291 | extern struct dentry *nfs_get_root(struct super_block *, struct nfs_fh *, |
292 | const char *); | |
7d4e2747 | 293 | #ifdef CONFIG_NFS_V4 |
0d5839ad AV |
294 | extern struct dentry *nfs4_get_root(struct super_block *, struct nfs_fh *, |
295 | const char *); | |
54ceac45 | 296 | |
815409d2 | 297 | extern int nfs4_get_rootfh(struct nfs_server *server, struct nfs_fh *mntfh); |
7d4e2747 | 298 | #endif |
f7b422b1 | 299 | |
061ae2ed | 300 | struct nfs_pgio_completion_ops; |
f11c88af | 301 | /* read.c */ |
4db6e0b7 | 302 | extern struct nfs_read_header *nfs_readhdr_alloc(void); |
cd841605 | 303 | extern void nfs_readhdr_free(struct nfs_pgio_header *hdr); |
584aa810 FI |
304 | extern void nfs_pageio_init_read(struct nfs_pageio_descriptor *pgio, |
305 | struct inode *inode, | |
306 | const struct nfs_pgio_completion_ops *compl_ops); | |
c5996c4e FI |
307 | extern int nfs_initiate_read(struct rpc_clnt *clnt, |
308 | struct nfs_read_data *data, | |
dc70d7b3 | 309 | const struct rpc_call_ops *call_ops); |
f11c88af | 310 | extern void nfs_read_prepare(struct rpc_task *task, void *calldata); |
493292dd | 311 | extern int nfs_generic_pagein(struct nfs_pageio_descriptor *desc, |
4db6e0b7 | 312 | struct nfs_pgio_header *hdr); |
62e4a769 | 313 | extern void nfs_pageio_init_read_mds(struct nfs_pageio_descriptor *pgio, |
061ae2ed FI |
314 | struct inode *inode, |
315 | const struct nfs_pgio_completion_ops *compl_ops); | |
493292dd TM |
316 | extern void nfs_pageio_reset_read_mds(struct nfs_pageio_descriptor *pgio); |
317 | extern void nfs_readdata_release(struct nfs_read_data *rdata); | |
e885de1a | 318 | |
def6ed7e | 319 | /* write.c */ |
1763da12 FI |
320 | extern void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio, |
321 | struct inode *inode, int ioflags, | |
322 | const struct nfs_pgio_completion_ops *compl_ops); | |
6c75dc0d | 323 | extern struct nfs_write_header *nfs_writehdr_alloc(void); |
cd841605 | 324 | extern void nfs_writehdr_free(struct nfs_pgio_header *hdr); |
dce81290 | 325 | extern int nfs_generic_flush(struct nfs_pageio_descriptor *desc, |
6c75dc0d | 326 | struct nfs_pgio_header *hdr); |
e2fecb21 | 327 | extern void nfs_pageio_init_write_mds(struct nfs_pageio_descriptor *pgio, |
061ae2ed FI |
328 | struct inode *inode, int ioflags, |
329 | const struct nfs_pgio_completion_ops *compl_ops); | |
dce81290 TM |
330 | extern void nfs_pageio_reset_write_mds(struct nfs_pageio_descriptor *pgio); |
331 | extern void nfs_writedata_release(struct nfs_write_data *wdata); | |
0b7c0153 | 332 | extern void nfs_commit_free(struct nfs_commit_data *p); |
c5996c4e FI |
333 | extern int nfs_initiate_write(struct rpc_clnt *clnt, |
334 | struct nfs_write_data *data, | |
a69aef14 FI |
335 | const struct rpc_call_ops *call_ops, |
336 | int how); | |
def6ed7e | 337 | extern void nfs_write_prepare(struct rpc_task *task, void *calldata); |
0b7c0153 FI |
338 | extern void nfs_commit_prepare(struct rpc_task *task, void *calldata); |
339 | extern int nfs_initiate_commit(struct rpc_clnt *clnt, | |
340 | struct nfs_commit_data *data, | |
e0c2b380 FI |
341 | const struct rpc_call_ops *call_ops, |
342 | int how); | |
0b7c0153 | 343 | extern void nfs_init_commit(struct nfs_commit_data *data, |
e0c2b380 | 344 | struct list_head *head, |
f453a54a FI |
345 | struct pnfs_layout_segment *lseg, |
346 | struct nfs_commit_info *cinfo); | |
1763da12 FI |
347 | int nfs_scan_commit_list(struct list_head *src, struct list_head *dst, |
348 | struct nfs_commit_info *cinfo, int max); | |
349 | int nfs_scan_commit(struct inode *inode, struct list_head *dst, | |
350 | struct nfs_commit_info *cinfo); | |
351 | void nfs_mark_request_commit(struct nfs_page *req, | |
352 | struct pnfs_layout_segment *lseg, | |
353 | struct nfs_commit_info *cinfo); | |
354 | int nfs_generic_commit_list(struct inode *inode, struct list_head *head, | |
355 | int how, struct nfs_commit_info *cinfo); | |
e0c2b380 | 356 | void nfs_retry_commit(struct list_head *page_list, |
ea2cf228 FI |
357 | struct pnfs_layout_segment *lseg, |
358 | struct nfs_commit_info *cinfo); | |
0b7c0153 | 359 | void nfs_commitdata_release(struct nfs_commit_data *data); |
ea2cf228 FI |
360 | void nfs_request_add_commit_list(struct nfs_page *req, struct list_head *dst, |
361 | struct nfs_commit_info *cinfo); | |
362 | void nfs_request_remove_commit_list(struct nfs_page *req, | |
363 | struct nfs_commit_info *cinfo); | |
364 | void nfs_init_cinfo(struct nfs_commit_info *cinfo, | |
365 | struct inode *inode, | |
366 | struct nfs_direct_req *dreq); | |
e0c2b380 | 367 | |
074cc1de TM |
368 | #ifdef CONFIG_MIGRATION |
369 | extern int nfs_migrate_page(struct address_space *, | |
a6bc32b8 | 370 | struct page *, struct page *, enum migrate_mode); |
074cc1de TM |
371 | #else |
372 | #define nfs_migrate_page NULL | |
373 | #endif | |
def6ed7e | 374 | |
1763da12 FI |
375 | /* direct.c */ |
376 | void nfs_init_cinfo_from_dreq(struct nfs_commit_info *cinfo, | |
377 | struct nfs_direct_req *dreq); | |
378 | ||
cccef3b9 | 379 | /* nfs4proc.c */ |
d20581aa | 380 | extern void __nfs4_read_done_cb(struct nfs_read_data *); |
cbdabc7f | 381 | extern void nfs4_reset_read(struct rpc_task *task, struct nfs_read_data *data); |
45a52a02 AA |
382 | extern int nfs4_init_client(struct nfs_client *clp, |
383 | const struct rpc_timeout *timeparms, | |
384 | const char *ip_addr, | |
385 | rpc_authflavor_t authflavour, | |
386 | int noresvport); | |
a69aef14 | 387 | extern void nfs4_reset_write(struct rpc_task *task, struct nfs_write_data *data); |
7c513058 BS |
388 | extern int _nfs4_call_sync(struct rpc_clnt *clnt, |
389 | struct nfs_server *server, | |
cccef3b9 AA |
390 | struct rpc_message *msg, |
391 | struct nfs4_sequence_args *args, | |
392 | struct nfs4_sequence_res *res, | |
393 | int cache_reply); | |
7c513058 BS |
394 | extern int _nfs4_call_sync_session(struct rpc_clnt *clnt, |
395 | struct nfs_server *server, | |
cccef3b9 AA |
396 | struct rpc_message *msg, |
397 | struct nfs4_sequence_args *args, | |
398 | struct nfs4_sequence_res *res, | |
399 | int cache_reply); | |
400 | ||
f7b422b1 DH |
401 | /* |
402 | * Determine the device name as a string | |
403 | */ | |
b514f872 | 404 | static inline char *nfs_devname(struct dentry *dentry, |
54ceac45 | 405 | char *buffer, ssize_t buflen) |
f7b422b1 | 406 | { |
b514f872 AV |
407 | char *dummy; |
408 | return nfs_path(&dummy, dentry, buffer, buflen); | |
f7b422b1 DH |
409 | } |
410 | ||
411 | /* | |
412 | * Determine the actual block size (and log2 thereof) | |
413 | */ | |
414 | static inline | |
415 | unsigned long nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp) | |
416 | { | |
417 | /* make sure blocksize is a power of two */ | |
418 | if ((bsize & (bsize - 1)) || nrbitsp) { | |
419 | unsigned char nrbits; | |
420 | ||
421 | for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--) | |
422 | ; | |
423 | bsize = 1 << nrbits; | |
424 | if (nrbitsp) | |
425 | *nrbitsp = nrbits; | |
426 | } | |
427 | ||
428 | return bsize; | |
429 | } | |
430 | ||
431 | /* | |
432 | * Calculate the number of 512byte blocks used. | |
433 | */ | |
9eaa67c6 | 434 | static inline blkcnt_t nfs_calc_block_size(u64 tsize) |
f7b422b1 | 435 | { |
9eaa67c6 | 436 | blkcnt_t used = (tsize + 511) >> 9; |
f7b422b1 DH |
437 | return (used > ULONG_MAX) ? ULONG_MAX : used; |
438 | } | |
439 | ||
440 | /* | |
441 | * Compute and set NFS server blocksize | |
442 | */ | |
443 | static inline | |
444 | unsigned long nfs_block_size(unsigned long bsize, unsigned char *nrbitsp) | |
445 | { | |
446 | if (bsize < NFS_MIN_FILE_IO_SIZE) | |
447 | bsize = NFS_DEF_FILE_IO_SIZE; | |
448 | else if (bsize >= NFS_MAX_FILE_IO_SIZE) | |
449 | bsize = NFS_MAX_FILE_IO_SIZE; | |
450 | ||
451 | return nfs_block_bits(bsize, nrbitsp); | |
452 | } | |
453 | ||
454 | /* | |
455 | * Determine the maximum file size for a superblock | |
456 | */ | |
457 | static inline | |
458 | void nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize) | |
459 | { | |
460 | sb->s_maxbytes = (loff_t)maxfilesize; | |
461 | if (sb->s_maxbytes > MAX_LFS_FILESIZE || sb->s_maxbytes <= 0) | |
462 | sb->s_maxbytes = MAX_LFS_FILESIZE; | |
463 | } | |
49a70f27 TM |
464 | |
465 | /* | |
466 | * Determine the number of bytes of data the page contains | |
467 | */ | |
468 | static inline | |
469 | unsigned int nfs_page_length(struct page *page) | |
470 | { | |
471 | loff_t i_size = i_size_read(page->mapping->host); | |
472 | ||
473 | if (i_size > 0) { | |
474 | pgoff_t end_index = (i_size - 1) >> PAGE_CACHE_SHIFT; | |
475 | if (page->index < end_index) | |
476 | return PAGE_CACHE_SIZE; | |
477 | if (page->index == end_index) | |
478 | return ((i_size - 1) & ~PAGE_CACHE_MASK) + 1; | |
479 | } | |
480 | return 0; | |
481 | } | |
8d5658c9 | 482 | |
0b26a0bf TM |
483 | /* |
484 | * Convert a umode to a dirent->d_type | |
485 | */ | |
486 | static inline | |
487 | unsigned char nfs_umode_to_dtype(umode_t mode) | |
488 | { | |
489 | return (mode >> 12) & 15; | |
490 | } | |
491 | ||
8d5658c9 TM |
492 | /* |
493 | * Determine the number of pages in an array of length 'len' and | |
494 | * with a base offset of 'base' | |
495 | */ | |
496 | static inline | |
497 | unsigned int nfs_page_array_len(unsigned int base, size_t len) | |
498 | { | |
499 | return ((unsigned long)len + (unsigned long)base + | |
500 | PAGE_SIZE - 1) >> PAGE_SHIFT; | |
501 | } | |
0110ee15 | 502 |