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 | ||
f7b422b1 DH |
33 | struct nfs_clone_mount { |
34 | const struct super_block *sb; | |
35 | const struct dentry *dentry; | |
36 | struct nfs_fh *fh; | |
37 | struct nfs_fattr *fattr; | |
38 | char *hostname; | |
39 | char *mnt_path; | |
6677d095 CL |
40 | struct sockaddr *addr; |
41 | size_t addrlen; | |
f7b422b1 DH |
42 | rpc_authflavor_t authflavor; |
43 | }; | |
44 | ||
a14017db CL |
45 | /* |
46 | * Note: RFC 1813 doesn't limit the number of auth flavors that | |
47 | * a server can return, so make something up. | |
48 | */ | |
49 | #define NFS_MAX_SECFLAVORS (12) | |
50 | ||
6b18eaa0 TT |
51 | /* |
52 | * In-kernel mount arguments | |
53 | */ | |
54 | struct nfs_parsed_mount_data { | |
55 | int flags; | |
56 | int rsize, wsize; | |
57 | int timeo, retrans; | |
58 | int acregmin, acregmax, | |
59 | acdirmin, acdirmax; | |
60 | int namlen; | |
b797cac7 | 61 | unsigned int options; |
6b18eaa0 TT |
62 | unsigned int bsize; |
63 | unsigned int auth_flavor_len; | |
64 | rpc_authflavor_t auth_flavors[1]; | |
65 | char *client_address; | |
3fd5be9e | 66 | unsigned int minorversion; |
08734048 | 67 | char *fscache_uniq; |
6b18eaa0 TT |
68 | |
69 | struct { | |
4c568017 CL |
70 | struct sockaddr_storage address; |
71 | size_t addrlen; | |
6b18eaa0 | 72 | char *hostname; |
78fa701f | 73 | u32 version; |
6b18eaa0 | 74 | unsigned short port; |
78fa701f | 75 | unsigned short protocol; |
6b18eaa0 TT |
76 | } mount_server; |
77 | ||
78 | struct { | |
4c568017 CL |
79 | struct sockaddr_storage address; |
80 | size_t addrlen; | |
6b18eaa0 TT |
81 | char *hostname; |
82 | char *export_path; | |
f22d6d79 | 83 | unsigned short port; |
78fa701f | 84 | unsigned short protocol; |
6b18eaa0 | 85 | } nfs_server; |
f9c3a380 EP |
86 | |
87 | struct security_mnt_opts lsm_opts; | |
6b18eaa0 TT |
88 | }; |
89 | ||
146ec944 | 90 | /* mount_clnt.c */ |
c5d120f8 CL |
91 | struct nfs_mount_request { |
92 | struct sockaddr *sap; | |
93 | size_t salen; | |
94 | char *hostname; | |
95 | char *dirpath; | |
96 | u32 version; | |
97 | unsigned short protocol; | |
98 | struct nfs_fh *fh; | |
50a737f8 | 99 | int noresvport; |
8e02f6b9 CL |
100 | unsigned int *auth_flav_len; |
101 | rpc_authflavor_t *auth_flavs; | |
c5d120f8 CL |
102 | }; |
103 | ||
104 | extern int nfs_mount(struct nfs_mount_request *info); | |
146ec944 | 105 | |
24c8dbbb | 106 | /* client.c */ |
54ceac45 DH |
107 | extern struct rpc_program nfs_program; |
108 | ||
24c8dbbb | 109 | extern void nfs_put_client(struct nfs_client *); |
ff052645 | 110 | extern struct nfs_client *nfs_find_client(const struct sockaddr *, u32); |
3fbd67ad | 111 | extern struct nfs_client *nfs_find_client_next(struct nfs_client *); |
2283f8d6 TT |
112 | extern struct nfs_server *nfs_create_server( |
113 | const struct nfs_parsed_mount_data *, | |
114 | struct nfs_fh *); | |
91ea40b9 TT |
115 | extern struct nfs_server *nfs4_create_server( |
116 | const struct nfs_parsed_mount_data *, | |
117 | struct nfs_fh *); | |
54ceac45 DH |
118 | extern struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *, |
119 | struct nfs_fh *); | |
120 | extern void nfs_free_server(struct nfs_server *server); | |
121 | extern struct nfs_server *nfs_clone_server(struct nfs_server *, | |
122 | struct nfs_fh *, | |
123 | struct nfs_fattr *); | |
76db6d95 | 124 | extern void nfs_mark_client_ready(struct nfs_client *clp, int state); |
008f55d0 | 125 | extern int nfs4_check_client_ready(struct nfs_client *clp); |
6aaca566 DH |
126 | #ifdef CONFIG_PROC_FS |
127 | extern int __init nfs_fs_proc_init(void); | |
128 | extern void nfs_fs_proc_exit(void); | |
129 | #else | |
130 | static inline int nfs_fs_proc_init(void) | |
131 | { | |
132 | return 0; | |
133 | } | |
134 | static inline void nfs_fs_proc_exit(void) | |
135 | { | |
136 | } | |
137 | #endif | |
24c8dbbb | 138 | |
7d4e2747 | 139 | /* nfs4namespace.c */ |
f7b422b1 DH |
140 | #ifdef CONFIG_NFS_V4 |
141 | extern struct vfsmount *nfs_do_refmount(const struct vfsmount *mnt_parent, struct dentry *dentry); | |
142 | #else | |
143 | static inline | |
144 | struct vfsmount *nfs_do_refmount(const struct vfsmount *mnt_parent, struct dentry *dentry) | |
145 | { | |
146 | return ERR_PTR(-ENOENT); | |
147 | } | |
148 | #endif | |
149 | ||
150 | /* callback_xdr.c */ | |
151 | extern struct svc_version nfs4_callback_version1; | |
152 | ||
153 | /* pagelist.c */ | |
154 | extern int __init nfs_init_nfspagecache(void); | |
266bee88 | 155 | extern void nfs_destroy_nfspagecache(void); |
f7b422b1 | 156 | extern int __init nfs_init_readpagecache(void); |
266bee88 | 157 | extern void nfs_destroy_readpagecache(void); |
f7b422b1 | 158 | extern int __init nfs_init_writepagecache(void); |
266bee88 | 159 | extern void nfs_destroy_writepagecache(void); |
f7b422b1 | 160 | |
f7b422b1 | 161 | extern int __init nfs_init_directcache(void); |
266bee88 | 162 | extern void nfs_destroy_directcache(void); |
f7b422b1 DH |
163 | |
164 | /* nfs2xdr.c */ | |
7d4e2747 | 165 | extern int nfs_stat_to_errno(int); |
f7b422b1 | 166 | extern struct rpc_procinfo nfs_procedures[]; |
0dbb4c67 | 167 | extern __be32 * nfs_decode_dirent(__be32 *, struct nfs_entry *, int); |
f7b422b1 DH |
168 | |
169 | /* nfs3xdr.c */ | |
170 | extern struct rpc_procinfo nfs3_procedures[]; | |
0dbb4c67 | 171 | extern __be32 *nfs3_decode_dirent(__be32 *, struct nfs_entry *, int); |
f7b422b1 | 172 | |
eedc020e AA |
173 | /* nfs4proc.c */ |
174 | static inline void nfs4_restart_rpc(struct rpc_task *task, | |
175 | const struct nfs_client *clp) | |
176 | { | |
177 | #ifdef CONFIG_NFS_V4_1 | |
178 | if (nfs4_has_session(clp) && | |
179 | test_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state)) { | |
180 | rpc_restart_call_prepare(task); | |
181 | return; | |
182 | } | |
183 | #endif /* CONFIG_NFS_V4_1 */ | |
184 | rpc_restart_call(task); | |
185 | } | |
186 | ||
f7b422b1 | 187 | /* nfs4xdr.c */ |
7d4e2747 | 188 | #ifdef CONFIG_NFS_V4 |
0dbb4c67 | 189 | extern __be32 *nfs4_decode_dirent(__be32 *p, struct nfs_entry *entry, int plus); |
7d4e2747 | 190 | #endif |
f7b422b1 DH |
191 | |
192 | /* nfs4proc.c */ | |
d75d5414 | 193 | #ifdef CONFIG_NFS_V4 |
f7b422b1 | 194 | extern struct rpc_procinfo nfs4_procedures[]; |
d75d5414 | 195 | #endif |
f7b422b1 | 196 | |
7fe5c398 TM |
197 | /* proc.c */ |
198 | void nfs_close_context(struct nfs_open_context *ctx, int is_sync); | |
199 | ||
979df72e TM |
200 | /* dir.c */ |
201 | extern int nfs_access_cache_shrinker(int nr_to_scan, gfp_t gfp_mask); | |
202 | ||
f7b422b1 | 203 | /* inode.c */ |
5746006f | 204 | extern struct workqueue_struct *nfsiod_workqueue; |
f7b422b1 DH |
205 | extern struct inode *nfs_alloc_inode(struct super_block *sb); |
206 | extern void nfs_destroy_inode(struct inode *); | |
207 | extern int nfs_write_inode(struct inode *,int); | |
208 | extern void nfs_clear_inode(struct inode *); | |
209 | #ifdef CONFIG_NFS_V4 | |
210 | extern void nfs4_clear_inode(struct inode *); | |
211 | #endif | |
f41f7418 | 212 | void nfs_zap_acl_cache(struct inode *inode); |
72cb77f4 | 213 | extern int nfs_wait_bit_killable(void *word); |
f7b422b1 DH |
214 | |
215 | /* super.c */ | |
ea31a443 | 216 | void nfs_parse_ip_address(char *, size_t, struct sockaddr *, size_t *); |
54ceac45 | 217 | extern struct file_system_type nfs_xdev_fs_type; |
f7b422b1 | 218 | #ifdef CONFIG_NFS_V4 |
54ceac45 DH |
219 | extern struct file_system_type nfs4_xdev_fs_type; |
220 | extern struct file_system_type nfs4_referral_fs_type; | |
f7b422b1 | 221 | #endif |
4ebd9ab3 | 222 | |
f7b422b1 | 223 | extern struct rpc_stat nfs_rpcstat; |
4ebd9ab3 | 224 | |
f7b422b1 DH |
225 | extern int __init register_nfs_fs(void); |
226 | extern void __exit unregister_nfs_fs(void); | |
1daef0a8 TM |
227 | extern void nfs_sb_active(struct super_block *sb); |
228 | extern void nfs_sb_deactive(struct super_block *sb); | |
f7b422b1 DH |
229 | |
230 | /* namespace.c */ | |
54ceac45 DH |
231 | extern char *nfs_path(const char *base, |
232 | const struct dentry *droot, | |
233 | const struct dentry *dentry, | |
f7b422b1 DH |
234 | char *buffer, ssize_t buflen); |
235 | ||
54ceac45 DH |
236 | /* getroot.c */ |
237 | extern struct dentry *nfs_get_root(struct super_block *, struct nfs_fh *); | |
7d4e2747 | 238 | #ifdef CONFIG_NFS_V4 |
54ceac45 DH |
239 | extern struct dentry *nfs4_get_root(struct super_block *, struct nfs_fh *); |
240 | ||
241 | extern int nfs4_path_walk(struct nfs_server *server, | |
242 | struct nfs_fh *mntfh, | |
243 | const char *path); | |
7d4e2747 | 244 | #endif |
f7b422b1 | 245 | |
f11c88af AA |
246 | /* read.c */ |
247 | extern void nfs_read_prepare(struct rpc_task *task, void *calldata); | |
248 | ||
def6ed7e AA |
249 | /* write.c */ |
250 | extern void nfs_write_prepare(struct rpc_task *task, void *calldata); | |
251 | ||
cccef3b9 AA |
252 | /* nfs4proc.c */ |
253 | extern int _nfs4_call_sync(struct nfs_server *server, | |
254 | struct rpc_message *msg, | |
255 | struct nfs4_sequence_args *args, | |
256 | struct nfs4_sequence_res *res, | |
257 | int cache_reply); | |
258 | extern int _nfs4_call_sync_session(struct nfs_server *server, | |
259 | struct rpc_message *msg, | |
260 | struct nfs4_sequence_args *args, | |
261 | struct nfs4_sequence_res *res, | |
262 | int cache_reply); | |
263 | ||
13615871 AA |
264 | #ifdef CONFIG_NFS_V4_1 |
265 | extern void nfs41_sequence_free_slot(const struct nfs_client *, | |
266 | struct nfs4_sequence_res *res); | |
267 | #endif /* CONFIG_NFS_V4_1 */ | |
268 | ||
269 | static inline void nfs4_sequence_free_slot(const struct nfs_client *clp, | |
270 | struct nfs4_sequence_res *res) | |
271 | { | |
272 | #ifdef CONFIG_NFS_V4_1 | |
273 | if (nfs4_has_session(clp)) | |
274 | nfs41_sequence_free_slot(clp, res); | |
275 | #endif /* CONFIG_NFS_V4_1 */ | |
276 | } | |
277 | ||
f7b422b1 DH |
278 | /* |
279 | * Determine the device name as a string | |
280 | */ | |
281 | static inline char *nfs_devname(const struct vfsmount *mnt_parent, | |
54ceac45 DH |
282 | const struct dentry *dentry, |
283 | char *buffer, ssize_t buflen) | |
f7b422b1 | 284 | { |
54ceac45 DH |
285 | return nfs_path(mnt_parent->mnt_devname, mnt_parent->mnt_root, |
286 | dentry, buffer, buflen); | |
f7b422b1 DH |
287 | } |
288 | ||
289 | /* | |
290 | * Determine the actual block size (and log2 thereof) | |
291 | */ | |
292 | static inline | |
293 | unsigned long nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp) | |
294 | { | |
295 | /* make sure blocksize is a power of two */ | |
296 | if ((bsize & (bsize - 1)) || nrbitsp) { | |
297 | unsigned char nrbits; | |
298 | ||
299 | for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--) | |
300 | ; | |
301 | bsize = 1 << nrbits; | |
302 | if (nrbitsp) | |
303 | *nrbitsp = nrbits; | |
304 | } | |
305 | ||
306 | return bsize; | |
307 | } | |
308 | ||
309 | /* | |
310 | * Calculate the number of 512byte blocks used. | |
311 | */ | |
9eaa67c6 | 312 | static inline blkcnt_t nfs_calc_block_size(u64 tsize) |
f7b422b1 | 313 | { |
9eaa67c6 | 314 | blkcnt_t used = (tsize + 511) >> 9; |
f7b422b1 DH |
315 | return (used > ULONG_MAX) ? ULONG_MAX : used; |
316 | } | |
317 | ||
318 | /* | |
319 | * Compute and set NFS server blocksize | |
320 | */ | |
321 | static inline | |
322 | unsigned long nfs_block_size(unsigned long bsize, unsigned char *nrbitsp) | |
323 | { | |
324 | if (bsize < NFS_MIN_FILE_IO_SIZE) | |
325 | bsize = NFS_DEF_FILE_IO_SIZE; | |
326 | else if (bsize >= NFS_MAX_FILE_IO_SIZE) | |
327 | bsize = NFS_MAX_FILE_IO_SIZE; | |
328 | ||
329 | return nfs_block_bits(bsize, nrbitsp); | |
330 | } | |
331 | ||
332 | /* | |
333 | * Determine the maximum file size for a superblock | |
334 | */ | |
335 | static inline | |
336 | void nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize) | |
337 | { | |
338 | sb->s_maxbytes = (loff_t)maxfilesize; | |
339 | if (sb->s_maxbytes > MAX_LFS_FILESIZE || sb->s_maxbytes <= 0) | |
340 | sb->s_maxbytes = MAX_LFS_FILESIZE; | |
341 | } | |
49a70f27 TM |
342 | |
343 | /* | |
344 | * Determine the number of bytes of data the page contains | |
345 | */ | |
346 | static inline | |
347 | unsigned int nfs_page_length(struct page *page) | |
348 | { | |
349 | loff_t i_size = i_size_read(page->mapping->host); | |
350 | ||
351 | if (i_size > 0) { | |
352 | pgoff_t end_index = (i_size - 1) >> PAGE_CACHE_SHIFT; | |
353 | if (page->index < end_index) | |
354 | return PAGE_CACHE_SIZE; | |
355 | if (page->index == end_index) | |
356 | return ((i_size - 1) & ~PAGE_CACHE_MASK) + 1; | |
357 | } | |
358 | return 0; | |
359 | } | |
8d5658c9 TM |
360 | |
361 | /* | |
362 | * Determine the number of pages in an array of length 'len' and | |
363 | * with a base offset of 'base' | |
364 | */ | |
365 | static inline | |
366 | unsigned int nfs_page_array_len(unsigned int base, size_t len) | |
367 | { | |
368 | return ((unsigned long)len + (unsigned long)base + | |
369 | PAGE_SIZE - 1) >> PAGE_SHIFT; | |
370 | } | |
371 | ||
ea31a443 | 372 | #define IPV6_SCOPE_DELIMITER '%' |
f0c92925 BF |
373 | |
374 | /* | |
375 | * Set the port number in an address. Be agnostic about the address | |
376 | * family. | |
377 | */ | |
378 | static inline void nfs_set_port(struct sockaddr *sap, unsigned short port) | |
379 | { | |
456018d7 BF |
380 | struct sockaddr_in *ap = (struct sockaddr_in *)sap; |
381 | struct sockaddr_in6 *ap6 = (struct sockaddr_in6 *)sap; | |
382 | ||
f0c92925 | 383 | switch (sap->sa_family) { |
456018d7 BF |
384 | case AF_INET: |
385 | ap->sin_port = htons(port); | |
386 | break; | |
387 | case AF_INET6: | |
388 | ap6->sin6_port = htons(port); | |
389 | break; | |
f0c92925 BF |
390 | } |
391 | } |