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 | ||
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 | ||
f7b422b1 DH |
48 | struct nfs_clone_mount { |
49 | const struct super_block *sb; | |
50 | const struct dentry *dentry; | |
51 | struct nfs_fh *fh; | |
52 | struct nfs_fattr *fattr; | |
53 | char *hostname; | |
54 | char *mnt_path; | |
6677d095 CL |
55 | struct sockaddr *addr; |
56 | size_t addrlen; | |
f7b422b1 DH |
57 | rpc_authflavor_t authflavor; |
58 | }; | |
59 | ||
a14017db CL |
60 | /* |
61 | * Note: RFC 1813 doesn't limit the number of auth flavors that | |
62 | * a server can return, so make something up. | |
63 | */ | |
64 | #define NFS_MAX_SECFLAVORS (12) | |
65 | ||
4cfd74fc CL |
66 | /* |
67 | * Value used if the user did not specify a port value. | |
68 | */ | |
69 | #define NFS_UNSPEC_PORT (-1) | |
70 | ||
56e4ebf8 BS |
71 | /* |
72 | * Maximum number of pages that readdir can use for creating | |
73 | * a vmapped array of pages. | |
74 | */ | |
75 | #define NFS_MAX_READDIR_PAGES 8 | |
76 | ||
6b18eaa0 TT |
77 | /* |
78 | * In-kernel mount arguments | |
79 | */ | |
80 | struct nfs_parsed_mount_data { | |
81 | int flags; | |
82 | int rsize, wsize; | |
83 | int timeo, retrans; | |
84 | int acregmin, acregmax, | |
85 | acdirmin, acdirmax; | |
86 | int namlen; | |
b797cac7 | 87 | unsigned int options; |
6b18eaa0 TT |
88 | unsigned int bsize; |
89 | unsigned int auth_flavor_len; | |
90 | rpc_authflavor_t auth_flavors[1]; | |
91 | char *client_address; | |
764302cc | 92 | unsigned int version; |
3fd5be9e | 93 | unsigned int minorversion; |
08734048 | 94 | char *fscache_uniq; |
6b18eaa0 TT |
95 | |
96 | struct { | |
4c568017 CL |
97 | struct sockaddr_storage address; |
98 | size_t addrlen; | |
6b18eaa0 | 99 | char *hostname; |
78fa701f | 100 | u32 version; |
4cfd74fc | 101 | int port; |
78fa701f | 102 | unsigned short protocol; |
6b18eaa0 TT |
103 | } mount_server; |
104 | ||
105 | struct { | |
4c568017 CL |
106 | struct sockaddr_storage address; |
107 | size_t addrlen; | |
6b18eaa0 TT |
108 | char *hostname; |
109 | char *export_path; | |
4cfd74fc | 110 | int port; |
78fa701f | 111 | unsigned short protocol; |
6b18eaa0 | 112 | } nfs_server; |
f9c3a380 EP |
113 | |
114 | struct security_mnt_opts lsm_opts; | |
6b18eaa0 TT |
115 | }; |
116 | ||
146ec944 | 117 | /* mount_clnt.c */ |
c5d120f8 CL |
118 | struct nfs_mount_request { |
119 | struct sockaddr *sap; | |
120 | size_t salen; | |
121 | char *hostname; | |
122 | char *dirpath; | |
123 | u32 version; | |
124 | unsigned short protocol; | |
125 | struct nfs_fh *fh; | |
50a737f8 | 126 | int noresvport; |
8e02f6b9 CL |
127 | unsigned int *auth_flav_len; |
128 | rpc_authflavor_t *auth_flavs; | |
c5d120f8 CL |
129 | }; |
130 | ||
131 | extern int nfs_mount(struct nfs_mount_request *info); | |
0b524123 | 132 | extern void nfs_umount(const struct nfs_mount_request *info); |
146ec944 | 133 | |
24c8dbbb | 134 | /* client.c */ |
54ceac45 DH |
135 | extern struct rpc_program nfs_program; |
136 | ||
f4eecd5d | 137 | extern void nfs_cleanup_cb_ident_idr(void); |
24c8dbbb | 138 | extern void nfs_put_client(struct nfs_client *); |
c36fca52 AA |
139 | extern struct nfs_client *nfs4_find_client_no_ident(const struct sockaddr *); |
140 | extern struct nfs_client *nfs4_find_client_ident(int); | |
141 | extern struct nfs_client * | |
778be232 | 142 | nfs4_find_client_sessionid(const struct sockaddr *, struct nfs4_sessionid *); |
2283f8d6 TT |
143 | extern struct nfs_server *nfs_create_server( |
144 | const struct nfs_parsed_mount_data *, | |
145 | struct nfs_fh *); | |
91ea40b9 TT |
146 | extern struct nfs_server *nfs4_create_server( |
147 | const struct nfs_parsed_mount_data *, | |
148 | struct nfs_fh *); | |
54ceac45 DH |
149 | extern struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *, |
150 | struct nfs_fh *); | |
151 | extern void nfs_free_server(struct nfs_server *server); | |
152 | extern struct nfs_server *nfs_clone_server(struct nfs_server *, | |
153 | struct nfs_fh *, | |
154 | struct nfs_fattr *); | |
76db6d95 | 155 | extern void nfs_mark_client_ready(struct nfs_client *clp, int state); |
008f55d0 | 156 | extern int nfs4_check_client_ready(struct nfs_client *clp); |
d83217c1 AA |
157 | extern struct nfs_client *nfs4_set_ds_client(struct nfs_client* mds_clp, |
158 | const struct sockaddr *ds_addr, | |
159 | int ds_addrlen, int ds_proto); | |
6aaca566 DH |
160 | #ifdef CONFIG_PROC_FS |
161 | extern int __init nfs_fs_proc_init(void); | |
162 | extern void nfs_fs_proc_exit(void); | |
163 | #else | |
164 | static inline int nfs_fs_proc_init(void) | |
165 | { | |
166 | return 0; | |
167 | } | |
168 | static inline void nfs_fs_proc_exit(void) | |
169 | { | |
170 | } | |
171 | #endif | |
24c8dbbb | 172 | |
7d4e2747 | 173 | /* nfs4namespace.c */ |
f7b422b1 | 174 | #ifdef CONFIG_NFS_V4 |
f8ad9c4b | 175 | extern struct vfsmount *nfs_do_refmount(struct dentry *dentry); |
f7b422b1 DH |
176 | #else |
177 | static inline | |
f8ad9c4b | 178 | struct vfsmount *nfs_do_refmount(struct dentry *dentry) |
f7b422b1 DH |
179 | { |
180 | return ERR_PTR(-ENOENT); | |
181 | } | |
182 | #endif | |
183 | ||
184 | /* callback_xdr.c */ | |
185 | extern struct svc_version nfs4_callback_version1; | |
07bccc2d | 186 | extern struct svc_version nfs4_callback_version4; |
f7b422b1 DH |
187 | |
188 | /* pagelist.c */ | |
189 | extern int __init nfs_init_nfspagecache(void); | |
266bee88 | 190 | extern void nfs_destroy_nfspagecache(void); |
f7b422b1 | 191 | extern int __init nfs_init_readpagecache(void); |
266bee88 | 192 | extern void nfs_destroy_readpagecache(void); |
f7b422b1 | 193 | extern int __init nfs_init_writepagecache(void); |
266bee88 | 194 | extern void nfs_destroy_writepagecache(void); |
f7b422b1 | 195 | |
f7b422b1 | 196 | extern int __init nfs_init_directcache(void); |
266bee88 | 197 | extern void nfs_destroy_directcache(void); |
f7b422b1 DH |
198 | |
199 | /* nfs2xdr.c */ | |
85828493 | 200 | extern int nfs_stat_to_errno(enum nfs_stat); |
f7b422b1 | 201 | extern struct rpc_procinfo nfs_procedures[]; |
573c4e1e CL |
202 | extern int nfs2_decode_dirent(struct xdr_stream *, |
203 | struct nfs_entry *, int); | |
f7b422b1 DH |
204 | |
205 | /* nfs3xdr.c */ | |
206 | extern struct rpc_procinfo nfs3_procedures[]; | |
573c4e1e CL |
207 | extern int nfs3_decode_dirent(struct xdr_stream *, |
208 | struct nfs_entry *, int); | |
f7b422b1 DH |
209 | |
210 | /* nfs4xdr.c */ | |
7d4e2747 | 211 | #ifdef CONFIG_NFS_V4 |
573c4e1e CL |
212 | extern int nfs4_decode_dirent(struct xdr_stream *, |
213 | struct nfs_entry *, int); | |
7d4e2747 | 214 | #endif |
2449ea2e AB |
215 | #ifdef CONFIG_NFS_V4_1 |
216 | extern const u32 nfs41_maxread_overhead; | |
217 | extern const u32 nfs41_maxwrite_overhead; | |
218 | #endif | |
f7b422b1 DH |
219 | |
220 | /* nfs4proc.c */ | |
d75d5414 | 221 | #ifdef CONFIG_NFS_V4 |
f7b422b1 | 222 | extern struct rpc_procinfo nfs4_procedures[]; |
7ebb9315 | 223 | void nfs_fixup_secinfo_attributes(struct nfs_fattr *, struct nfs_fh *); |
d75d5414 | 224 | #endif |
f7b422b1 | 225 | |
d83217c1 AA |
226 | extern int nfs4_init_ds_session(struct nfs_client *clp); |
227 | ||
7fe5c398 TM |
228 | /* proc.c */ |
229 | void nfs_close_context(struct nfs_open_context *ctx, int is_sync); | |
45a52a02 AA |
230 | extern int nfs_init_client(struct nfs_client *clp, |
231 | const struct rpc_timeout *timeparms, | |
232 | const char *ip_addr, rpc_authflavor_t authflavour, | |
233 | int noresvport); | |
7fe5c398 | 234 | |
979df72e | 235 | /* dir.c */ |
7f8275d0 DC |
236 | extern int nfs_access_cache_shrinker(struct shrinker *shrink, |
237 | int nr_to_scan, gfp_t gfp_mask); | |
979df72e | 238 | |
f7b422b1 | 239 | /* inode.c */ |
5746006f | 240 | extern struct workqueue_struct *nfsiod_workqueue; |
f7b422b1 DH |
241 | extern struct inode *nfs_alloc_inode(struct super_block *sb); |
242 | extern void nfs_destroy_inode(struct inode *); | |
a9185b41 | 243 | extern int nfs_write_inode(struct inode *, struct writeback_control *); |
b57922d9 | 244 | extern void nfs_evict_inode(struct inode *); |
f7b422b1 | 245 | #ifdef CONFIG_NFS_V4 |
b57922d9 | 246 | extern void nfs4_evict_inode(struct inode *); |
f7b422b1 | 247 | #endif |
f41f7418 | 248 | void nfs_zap_acl_cache(struct inode *inode); |
72cb77f4 | 249 | extern int nfs_wait_bit_killable(void *word); |
f7b422b1 DH |
250 | |
251 | /* super.c */ | |
54ceac45 | 252 | extern struct file_system_type nfs_xdev_fs_type; |
f7b422b1 | 253 | #ifdef CONFIG_NFS_V4 |
54ceac45 DH |
254 | extern struct file_system_type nfs4_xdev_fs_type; |
255 | extern struct file_system_type nfs4_referral_fs_type; | |
f7b422b1 | 256 | #endif |
4ebd9ab3 | 257 | |
f7b422b1 | 258 | extern struct rpc_stat nfs_rpcstat; |
4ebd9ab3 | 259 | |
f7b422b1 DH |
260 | extern int __init register_nfs_fs(void); |
261 | extern void __exit unregister_nfs_fs(void); | |
1daef0a8 TM |
262 | extern void nfs_sb_active(struct super_block *sb); |
263 | extern void nfs_sb_deactive(struct super_block *sb); | |
f7b422b1 DH |
264 | |
265 | /* namespace.c */ | |
b514f872 | 266 | extern char *nfs_path(char **p, struct dentry *dentry, |
f7b422b1 | 267 | char *buffer, ssize_t buflen); |
36d43a43 | 268 | extern struct vfsmount *nfs_d_automount(struct path *path); |
f7b422b1 | 269 | |
54ceac45 | 270 | /* getroot.c */ |
0d5839ad AV |
271 | extern struct dentry *nfs_get_root(struct super_block *, struct nfs_fh *, |
272 | const char *); | |
7d4e2747 | 273 | #ifdef CONFIG_NFS_V4 |
0d5839ad AV |
274 | extern struct dentry *nfs4_get_root(struct super_block *, struct nfs_fh *, |
275 | const char *); | |
54ceac45 | 276 | |
815409d2 | 277 | extern int nfs4_get_rootfh(struct nfs_server *server, struct nfs_fh *mntfh); |
7d4e2747 | 278 | #endif |
f7b422b1 | 279 | |
f11c88af | 280 | /* read.c */ |
dc70d7b3 AA |
281 | extern int nfs_initiate_read(struct nfs_read_data *data, struct rpc_clnt *clnt, |
282 | const struct rpc_call_ops *call_ops); | |
f11c88af AA |
283 | extern void nfs_read_prepare(struct rpc_task *task, void *calldata); |
284 | ||
def6ed7e | 285 | /* write.c */ |
e0c2b380 | 286 | extern void nfs_commit_free(struct nfs_write_data *p); |
a69aef14 FI |
287 | extern int nfs_initiate_write(struct nfs_write_data *data, |
288 | struct rpc_clnt *clnt, | |
289 | const struct rpc_call_ops *call_ops, | |
290 | int how); | |
def6ed7e | 291 | extern void nfs_write_prepare(struct rpc_task *task, void *calldata); |
e0c2b380 FI |
292 | extern int nfs_initiate_commit(struct nfs_write_data *data, |
293 | struct rpc_clnt *clnt, | |
294 | const struct rpc_call_ops *call_ops, | |
295 | int how); | |
296 | extern void nfs_init_commit(struct nfs_write_data *data, | |
297 | struct list_head *head, | |
298 | struct pnfs_layout_segment *lseg); | |
299 | void nfs_retry_commit(struct list_head *page_list, | |
300 | struct pnfs_layout_segment *lseg); | |
301 | void nfs_commit_clear_lock(struct nfs_inode *nfsi); | |
302 | void nfs_commitdata_release(void *data); | |
303 | void nfs_commit_release_pages(struct nfs_write_data *data); | |
304 | ||
074cc1de TM |
305 | #ifdef CONFIG_MIGRATION |
306 | extern int nfs_migrate_page(struct address_space *, | |
307 | struct page *, struct page *); | |
308 | #else | |
309 | #define nfs_migrate_page NULL | |
310 | #endif | |
def6ed7e | 311 | |
cccef3b9 | 312 | /* nfs4proc.c */ |
cbdabc7f | 313 | extern void nfs4_reset_read(struct rpc_task *task, struct nfs_read_data *data); |
45a52a02 AA |
314 | extern int nfs4_init_client(struct nfs_client *clp, |
315 | const struct rpc_timeout *timeparms, | |
316 | const char *ip_addr, | |
317 | rpc_authflavor_t authflavour, | |
318 | int noresvport); | |
a69aef14 | 319 | extern void nfs4_reset_write(struct rpc_task *task, struct nfs_write_data *data); |
7c513058 BS |
320 | extern int _nfs4_call_sync(struct rpc_clnt *clnt, |
321 | struct nfs_server *server, | |
cccef3b9 AA |
322 | struct rpc_message *msg, |
323 | struct nfs4_sequence_args *args, | |
324 | struct nfs4_sequence_res *res, | |
325 | int cache_reply); | |
7c513058 BS |
326 | extern int _nfs4_call_sync_session(struct rpc_clnt *clnt, |
327 | struct nfs_server *server, | |
cccef3b9 AA |
328 | struct rpc_message *msg, |
329 | struct nfs4_sequence_args *args, | |
330 | struct nfs4_sequence_res *res, | |
331 | int cache_reply); | |
332 | ||
f7b422b1 DH |
333 | /* |
334 | * Determine the device name as a string | |
335 | */ | |
b514f872 | 336 | static inline char *nfs_devname(struct dentry *dentry, |
54ceac45 | 337 | char *buffer, ssize_t buflen) |
f7b422b1 | 338 | { |
b514f872 AV |
339 | char *dummy; |
340 | return nfs_path(&dummy, dentry, buffer, buflen); | |
f7b422b1 DH |
341 | } |
342 | ||
343 | /* | |
344 | * Determine the actual block size (and log2 thereof) | |
345 | */ | |
346 | static inline | |
347 | unsigned long nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp) | |
348 | { | |
349 | /* make sure blocksize is a power of two */ | |
350 | if ((bsize & (bsize - 1)) || nrbitsp) { | |
351 | unsigned char nrbits; | |
352 | ||
353 | for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--) | |
354 | ; | |
355 | bsize = 1 << nrbits; | |
356 | if (nrbitsp) | |
357 | *nrbitsp = nrbits; | |
358 | } | |
359 | ||
360 | return bsize; | |
361 | } | |
362 | ||
363 | /* | |
364 | * Calculate the number of 512byte blocks used. | |
365 | */ | |
9eaa67c6 | 366 | static inline blkcnt_t nfs_calc_block_size(u64 tsize) |
f7b422b1 | 367 | { |
9eaa67c6 | 368 | blkcnt_t used = (tsize + 511) >> 9; |
f7b422b1 DH |
369 | return (used > ULONG_MAX) ? ULONG_MAX : used; |
370 | } | |
371 | ||
372 | /* | |
373 | * Compute and set NFS server blocksize | |
374 | */ | |
375 | static inline | |
376 | unsigned long nfs_block_size(unsigned long bsize, unsigned char *nrbitsp) | |
377 | { | |
378 | if (bsize < NFS_MIN_FILE_IO_SIZE) | |
379 | bsize = NFS_DEF_FILE_IO_SIZE; | |
380 | else if (bsize >= NFS_MAX_FILE_IO_SIZE) | |
381 | bsize = NFS_MAX_FILE_IO_SIZE; | |
382 | ||
383 | return nfs_block_bits(bsize, nrbitsp); | |
384 | } | |
385 | ||
386 | /* | |
387 | * Determine the maximum file size for a superblock | |
388 | */ | |
389 | static inline | |
390 | void nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize) | |
391 | { | |
392 | sb->s_maxbytes = (loff_t)maxfilesize; | |
393 | if (sb->s_maxbytes > MAX_LFS_FILESIZE || sb->s_maxbytes <= 0) | |
394 | sb->s_maxbytes = MAX_LFS_FILESIZE; | |
395 | } | |
49a70f27 TM |
396 | |
397 | /* | |
398 | * Determine the number of bytes of data the page contains | |
399 | */ | |
400 | static inline | |
401 | unsigned int nfs_page_length(struct page *page) | |
402 | { | |
403 | loff_t i_size = i_size_read(page->mapping->host); | |
404 | ||
405 | if (i_size > 0) { | |
406 | pgoff_t end_index = (i_size - 1) >> PAGE_CACHE_SHIFT; | |
407 | if (page->index < end_index) | |
408 | return PAGE_CACHE_SIZE; | |
409 | if (page->index == end_index) | |
410 | return ((i_size - 1) & ~PAGE_CACHE_MASK) + 1; | |
411 | } | |
412 | return 0; | |
413 | } | |
8d5658c9 | 414 | |
0b26a0bf TM |
415 | /* |
416 | * Convert a umode to a dirent->d_type | |
417 | */ | |
418 | static inline | |
419 | unsigned char nfs_umode_to_dtype(umode_t mode) | |
420 | { | |
421 | return (mode >> 12) & 15; | |
422 | } | |
423 | ||
8d5658c9 TM |
424 | /* |
425 | * Determine the number of pages in an array of length 'len' and | |
426 | * with a base offset of 'base' | |
427 | */ | |
428 | static inline | |
429 | unsigned int nfs_page_array_len(unsigned int base, size_t len) | |
430 | { | |
431 | return ((unsigned long)len + (unsigned long)base + | |
432 | PAGE_SIZE - 1) >> PAGE_SHIFT; | |
433 | } | |
0110ee15 TM |
434 | |
435 | /* | |
436 | * Helper for restarting RPC calls in the possible presence of NFSv4.1 | |
437 | * sessions. | |
438 | */ | |
d05dd4e9 | 439 | static inline int nfs_restart_rpc(struct rpc_task *task, const struct nfs_client *clp) |
0110ee15 TM |
440 | { |
441 | if (nfs4_has_session(clp)) | |
d05dd4e9 TM |
442 | return rpc_restart_call_prepare(task); |
443 | return rpc_restart_call(task); | |
0110ee15 | 444 | } |