]>
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> |
47af81f2 | 9 | #include <linux/nfs_page.h> |
5dd43ce2 | 10 | #include <linux/wait_bit.h> |
f7b422b1 | 11 | |
08734048 DH |
12 | #define NFS_MS_MASK (MS_RDONLY|MS_NOSUID|MS_NODEV|MS_NOEXEC|MS_SYNCHRONOUS) |
13 | ||
54ceac45 | 14 | struct nfs_string; |
54ceac45 DH |
15 | |
16 | /* Maximum number of readahead requests | |
17 | * FIXME: this should really be a sysctl so that users may tune it to suit | |
18 | * their needs. People that do NFS over a slow network, might for | |
19 | * instance want to reduce it to something closer to 1 for improved | |
20 | * interactive response. | |
21 | */ | |
22 | #define NFS_MAX_READAHEAD (RPC_DEF_SLOT_TABLE - 1) | |
23 | ||
7ebb9315 BS |
24 | static inline void nfs_attr_check_mountpoint(struct super_block *parent, struct nfs_fattr *fattr) |
25 | { | |
26 | if (!nfs_fsid_equal(&NFS_SB(parent)->fsid, &fattr->fsid)) | |
27 | fattr->valid |= NFS_ATTR_FATTR_MOUNTPOINT; | |
28 | } | |
29 | ||
533eb461 AA |
30 | static inline int nfs_attr_use_mounted_on_fileid(struct nfs_fattr *fattr) |
31 | { | |
32 | if (((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) == 0) || | |
33 | (((fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT) == 0) && | |
34 | ((fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) == 0))) | |
35 | return 0; | |
533eb461 AA |
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 | ||
a956beda TM |
62 | #define NFS_UNSPEC_RETRANS (UINT_MAX) |
63 | #define NFS_UNSPEC_TIMEO (UINT_MAX) | |
64 | ||
56e4ebf8 BS |
65 | /* |
66 | * Maximum number of pages that readdir can use for creating | |
67 | * a vmapped array of pages. | |
68 | */ | |
69 | #define NFS_MAX_READDIR_PAGES 8 | |
70 | ||
fcf10398 BS |
71 | struct nfs_client_initdata { |
72 | unsigned long init_flags; | |
5c6e5b60 TM |
73 | const char *hostname; /* Hostname of the server */ |
74 | const struct sockaddr *addr; /* Address of the server */ | |
75 | const char *nodename; /* Hostname of the client */ | |
76 | const char *ip_addr; /* IP address of the client */ | |
fcf10398 | 77 | size_t addrlen; |
ab7017a3 | 78 | struct nfs_subversion *nfs_mod; |
fcf10398 BS |
79 | int proto; |
80 | u32 minorversion; | |
81 | struct net *net; | |
5c6e5b60 | 82 | const struct rpc_timeout *timeparms; |
fcf10398 BS |
83 | }; |
84 | ||
6b18eaa0 TT |
85 | /* |
86 | * In-kernel mount arguments | |
87 | */ | |
88 | struct nfs_parsed_mount_data { | |
89 | int flags; | |
8cb7f74e CL |
90 | unsigned int rsize, wsize; |
91 | unsigned int timeo, retrans; | |
92 | unsigned int acregmin, acregmax, | |
6b18eaa0 | 93 | acdirmin, acdirmax; |
8cb7f74e | 94 | unsigned int namlen; |
b797cac7 | 95 | unsigned int options; |
6b18eaa0 | 96 | unsigned int bsize; |
a3f73c27 WAA |
97 | struct nfs_auth_info auth_info; |
98 | rpc_authflavor_t selected_flavor; | |
6b18eaa0 | 99 | char *client_address; |
764302cc | 100 | unsigned int version; |
3fd5be9e | 101 | unsigned int minorversion; |
08734048 | 102 | char *fscache_uniq; |
b72e4f42 | 103 | bool need_mount; |
6b18eaa0 TT |
104 | |
105 | struct { | |
4c568017 CL |
106 | struct sockaddr_storage address; |
107 | size_t addrlen; | |
6b18eaa0 | 108 | char *hostname; |
78fa701f | 109 | u32 version; |
4cfd74fc | 110 | int port; |
78fa701f | 111 | unsigned short protocol; |
6b18eaa0 TT |
112 | } mount_server; |
113 | ||
114 | struct { | |
4c568017 CL |
115 | struct sockaddr_storage address; |
116 | size_t addrlen; | |
6b18eaa0 TT |
117 | char *hostname; |
118 | char *export_path; | |
4cfd74fc | 119 | int port; |
78fa701f | 120 | unsigned short protocol; |
6b18eaa0 | 121 | } nfs_server; |
f9c3a380 EP |
122 | |
123 | struct security_mnt_opts lsm_opts; | |
e50a7a1a | 124 | struct net *net; |
6b18eaa0 TT |
125 | }; |
126 | ||
146ec944 | 127 | /* mount_clnt.c */ |
c5d120f8 CL |
128 | struct nfs_mount_request { |
129 | struct sockaddr *sap; | |
130 | size_t salen; | |
131 | char *hostname; | |
132 | char *dirpath; | |
133 | u32 version; | |
134 | unsigned short protocol; | |
135 | struct nfs_fh *fh; | |
50a737f8 | 136 | int noresvport; |
8e02f6b9 CL |
137 | unsigned int *auth_flav_len; |
138 | rpc_authflavor_t *auth_flavs; | |
6d59b8d5 | 139 | struct net *net; |
c5d120f8 CL |
140 | }; |
141 | ||
fbdefd64 BS |
142 | struct nfs_mount_info { |
143 | void (*fill_super)(struct super_block *, struct nfs_mount_info *); | |
144 | int (*set_security)(struct super_block *, struct dentry *, struct nfs_mount_info *); | |
145 | struct nfs_parsed_mount_data *parsed; | |
146 | struct nfs_clone_mount *cloned; | |
147 | struct nfs_fh *mntfh; | |
148 | }; | |
149 | ||
c5d120f8 | 150 | extern int nfs_mount(struct nfs_mount_request *info); |
0b524123 | 151 | extern void nfs_umount(const struct nfs_mount_request *info); |
146ec944 | 152 | |
24c8dbbb | 153 | /* client.c */ |
a613fa16 | 154 | extern const struct rpc_program nfs_program; |
6b13168b | 155 | extern void nfs_clients_init(struct net *net); |
6663ee7f | 156 | extern struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *); |
5c6e5b60 | 157 | int nfs_create_rpc_client(struct nfs_client *, const struct nfs_client_initdata *, rpc_authflavor_t); |
7d38de3f | 158 | struct nfs_client *nfs_get_client(const struct nfs_client_initdata *); |
fcf10398 BS |
159 | int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *, struct nfs_fattr *); |
160 | void nfs_server_insert_lists(struct nfs_server *); | |
32e62b7c | 161 | void nfs_server_remove_lists(struct nfs_server *); |
a956beda | 162 | void nfs_init_timeout_values(struct rpc_timeout *to, int proto, int timeo, int retrans); |
fcf10398 BS |
163 | int nfs_init_server_rpcclient(struct nfs_server *, const struct rpc_timeout *t, |
164 | rpc_authflavor_t); | |
165 | struct nfs_server *nfs_alloc_server(void); | |
166 | void nfs_server_copy_userdata(struct nfs_server *, struct nfs_server *); | |
54ceac45 | 167 | |
28cd1b3f | 168 | extern void nfs_cleanup_cb_ident_idr(struct net *); |
24c8dbbb | 169 | extern void nfs_put_client(struct nfs_client *); |
cdb7eced | 170 | extern void nfs_free_client(struct nfs_client *); |
28cd1b3f | 171 | extern struct nfs_client *nfs4_find_client_ident(struct net *, int); |
c36fca52 | 172 | extern struct nfs_client * |
c7add9a9 | 173 | nfs4_find_client_sessionid(struct net *, const struct sockaddr *, |
459de2ed | 174 | struct nfs4_sessionid *, u32); |
1179acc6 | 175 | extern struct nfs_server *nfs_create_server(struct nfs_mount_info *, |
ab7017a3 | 176 | struct nfs_subversion *); |
91ea40b9 | 177 | extern struct nfs_server *nfs4_create_server( |
1179acc6 BS |
178 | struct nfs_mount_info *, |
179 | struct nfs_subversion *); | |
54ceac45 DH |
180 | extern struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *, |
181 | struct nfs_fh *); | |
32e62b7c | 182 | extern int nfs4_update_server(struct nfs_server *server, const char *hostname, |
292f503c TM |
183 | struct sockaddr *sap, size_t salen, |
184 | struct net *net); | |
54ceac45 DH |
185 | extern void nfs_free_server(struct nfs_server *server); |
186 | extern struct nfs_server *nfs_clone_server(struct nfs_server *, | |
187 | struct nfs_fh *, | |
7e6eb683 BS |
188 | struct nfs_fattr *, |
189 | rpc_authflavor_t); | |
a33e4b03 WAA |
190 | extern bool nfs_client_init_is_complete(const struct nfs_client *clp); |
191 | extern int nfs_client_init_status(const struct nfs_client *clp); | |
4697bd5e | 192 | extern int nfs_wait_client_init_complete(const struct nfs_client *clp); |
76db6d95 | 193 | extern void nfs_mark_client_ready(struct nfs_client *clp, int state); |
3fc75f12 | 194 | extern struct nfs_client *nfs4_set_ds_client(struct nfs_server *mds_srv, |
d83217c1 | 195 | const struct sockaddr *ds_addr, |
98fc685a AA |
196 | int ds_addrlen, int ds_proto, |
197 | unsigned int ds_timeo, | |
064172f3 | 198 | unsigned int ds_retrans, |
7d38de3f | 199 | u32 minor_version); |
0e20162e AA |
200 | extern struct rpc_clnt *nfs4_find_or_create_ds_client(struct nfs_client *, |
201 | struct inode *); | |
b224f7cb | 202 | extern struct nfs_client *nfs3_set_ds_client(struct nfs_server *mds_srv, |
1a04c6e1 PT |
203 | const struct sockaddr *ds_addr, int ds_addrlen, |
204 | int ds_proto, unsigned int ds_timeo, | |
7d38de3f | 205 | unsigned int ds_retrans); |
6aaca566 DH |
206 | #ifdef CONFIG_PROC_FS |
207 | extern int __init nfs_fs_proc_init(void); | |
208 | extern void nfs_fs_proc_exit(void); | |
65b38851 EB |
209 | extern int nfs_fs_proc_net_init(struct net *net); |
210 | extern void nfs_fs_proc_net_exit(struct net *net); | |
6aaca566 | 211 | #else |
65b38851 EB |
212 | static inline int nfs_fs_proc_net_init(struct net *net) |
213 | { | |
214 | return 0; | |
215 | } | |
216 | static inline void nfs_fs_proc_net_exit(struct net *net) | |
217 | { | |
218 | } | |
6aaca566 DH |
219 | static inline int nfs_fs_proc_init(void) |
220 | { | |
221 | return 0; | |
222 | } | |
223 | static inline void nfs_fs_proc_exit(void) | |
224 | { | |
225 | } | |
226 | #endif | |
24c8dbbb | 227 | |
f7b422b1 DH |
228 | /* callback_xdr.c */ |
229 | extern struct svc_version nfs4_callback_version1; | |
07bccc2d | 230 | extern struct svc_version nfs4_callback_version4; |
f7b422b1 | 231 | |
4db6e0b7 | 232 | struct nfs_pageio_descriptor; |
f7b422b1 DH |
233 | /* pagelist.c */ |
234 | extern int __init nfs_init_nfspagecache(void); | |
266bee88 | 235 | extern void nfs_destroy_nfspagecache(void); |
f7b422b1 | 236 | extern int __init nfs_init_readpagecache(void); |
266bee88 | 237 | extern void nfs_destroy_readpagecache(void); |
f7b422b1 | 238 | extern int __init nfs_init_writepagecache(void); |
266bee88 | 239 | extern void nfs_destroy_writepagecache(void); |
f7b422b1 | 240 | |
f7b422b1 | 241 | extern int __init nfs_init_directcache(void); |
266bee88 | 242 | extern void nfs_destroy_directcache(void); |
4db6e0b7 FI |
243 | extern void nfs_pgheader_init(struct nfs_pageio_descriptor *desc, |
244 | struct nfs_pgio_header *hdr, | |
245 | void (*release)(struct nfs_pgio_header *hdr)); | |
246 | void nfs_set_pgio_error(struct nfs_pgio_header *hdr, int error, loff_t pos); | |
210c7c17 | 247 | int nfs_iocounter_wait(struct nfs_lock_context *l_ctx); |
577b4232 | 248 | |
41d8d5b7 | 249 | extern const struct nfs_pageio_ops nfs_pgio_rw_ops; |
1e7f3a48 WAA |
250 | struct nfs_pgio_header *nfs_pgio_header_alloc(const struct nfs_rw_ops *); |
251 | void nfs_pgio_header_free(struct nfs_pgio_header *); | |
d45f60c6 | 252 | void nfs_pgio_data_destroy(struct nfs_pgio_header *); |
ef2c488c | 253 | int nfs_generic_pgio(struct nfs_pageio_descriptor *, struct nfs_pgio_header *); |
46a5ab47 PT |
254 | int nfs_initiate_pgio(struct rpc_clnt *clnt, struct nfs_pgio_header *hdr, |
255 | struct rpc_cred *cred, const struct nfs_rpc_ops *rpc_ops, | |
256 | const struct rpc_call_ops *call_ops, int how, int flags); | |
d4581383 | 257 | void nfs_free_request(struct nfs_page *req); |
48d635f1 PT |
258 | struct nfs_pgio_mirror * |
259 | nfs_pgio_current_mirror(struct nfs_pageio_descriptor *desc); | |
00bfa30a | 260 | |
47af81f2 PT |
261 | static inline bool nfs_pgio_has_mirroring(struct nfs_pageio_descriptor *desc) |
262 | { | |
263 | WARN_ON_ONCE(desc->pg_mirror_count < 1); | |
264 | return desc->pg_mirror_count > 1; | |
265 | } | |
266 | ||
138a2935 TM |
267 | static inline bool nfs_match_open_context(const struct nfs_open_context *ctx1, |
268 | const struct nfs_open_context *ctx2) | |
269 | { | |
270 | return ctx1->cred == ctx2->cred && ctx1->state == ctx2->state; | |
271 | } | |
272 | ||
f7b422b1 DH |
273 | /* nfs2xdr.c */ |
274 | extern struct rpc_procinfo nfs_procedures[]; | |
573c4e1e CL |
275 | extern int nfs2_decode_dirent(struct xdr_stream *, |
276 | struct nfs_entry *, int); | |
f7b422b1 DH |
277 | |
278 | /* nfs3xdr.c */ | |
279 | extern struct rpc_procinfo nfs3_procedures[]; | |
573c4e1e CL |
280 | extern int nfs3_decode_dirent(struct xdr_stream *, |
281 | struct nfs_entry *, int); | |
f7b422b1 DH |
282 | |
283 | /* nfs4xdr.c */ | |
89d77c8f | 284 | #if IS_ENABLED(CONFIG_NFS_V4) |
573c4e1e CL |
285 | extern int nfs4_decode_dirent(struct xdr_stream *, |
286 | struct nfs_entry *, int); | |
7d4e2747 | 287 | #endif |
2449ea2e AB |
288 | #ifdef CONFIG_NFS_V4_1 |
289 | extern const u32 nfs41_maxread_overhead; | |
290 | extern const u32 nfs41_maxwrite_overhead; | |
f1c097be | 291 | extern const u32 nfs41_maxgetdevinfo_overhead; |
2449ea2e | 292 | #endif |
f7b422b1 DH |
293 | |
294 | /* nfs4proc.c */ | |
89d77c8f | 295 | #if IS_ENABLED(CONFIG_NFS_V4) |
f7b422b1 | 296 | extern struct rpc_procinfo nfs4_procedures[]; |
d75d5414 | 297 | #endif |
f7b422b1 | 298 | |
694e096f AS |
299 | #ifdef CONFIG_NFS_V4_SECURITY_LABEL |
300 | extern struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags); | |
a49c2691 KM |
301 | static inline struct nfs4_label * |
302 | nfs4_label_copy(struct nfs4_label *dst, struct nfs4_label *src) | |
303 | { | |
304 | if (!dst || !src) | |
305 | return NULL; | |
306 | ||
307 | if (src->len > NFS4_MAXLABELLEN) | |
308 | return NULL; | |
309 | ||
310 | dst->lfs = src->lfs; | |
311 | dst->pi = src->pi; | |
312 | dst->len = src->len; | |
313 | memcpy(dst->label, src->label, src->len); | |
314 | ||
315 | return dst; | |
316 | } | |
694e096f AS |
317 | static inline void nfs4_label_free(struct nfs4_label *label) |
318 | { | |
319 | if (label) { | |
320 | kfree(label->label); | |
321 | kfree(label); | |
322 | } | |
323 | return; | |
324 | } | |
fd1defc2 TM |
325 | |
326 | static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi) | |
327 | { | |
328 | if (nfs_server_capable(&nfsi->vfs_inode, NFS_CAP_SECURITY_LABEL)) | |
329 | nfsi->cache_validity |= NFS_INO_INVALID_LABEL; | |
330 | } | |
694e096f AS |
331 | #else |
332 | static inline struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags) { return NULL; } | |
333 | static inline void nfs4_label_free(void *label) {} | |
fd1defc2 TM |
334 | static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi) |
335 | { | |
336 | } | |
a49c2691 KM |
337 | static inline struct nfs4_label * |
338 | nfs4_label_copy(struct nfs4_label *dst, struct nfs4_label *src) | |
339 | { | |
340 | return NULL; | |
341 | } | |
694e096f AS |
342 | #endif /* CONFIG_NFS_V4_SECURITY_LABEL */ |
343 | ||
7fe5c398 TM |
344 | /* proc.c */ |
345 | void nfs_close_context(struct nfs_open_context *ctx, int is_sync); | |
8cab4c39 | 346 | extern struct nfs_client *nfs_init_client(struct nfs_client *clp, |
5c6e5b60 | 347 | const struct nfs_client_initdata *); |
7fe5c398 | 348 | |
979df72e | 349 | /* dir.c */ |
1bcf4c5c | 350 | extern void nfs_advise_use_readdirplus(struct inode *dir); |
311324ad | 351 | extern void nfs_force_use_readdirplus(struct inode *dir); |
1ab6c499 DC |
352 | extern unsigned long nfs_access_cache_count(struct shrinker *shrink, |
353 | struct shrink_control *sc); | |
354 | extern unsigned long nfs_access_cache_scan(struct shrinker *shrink, | |
355 | struct shrink_control *sc); | |
597d9289 BS |
356 | struct dentry *nfs_lookup(struct inode *, struct dentry *, unsigned int); |
357 | int nfs_create(struct inode *, struct dentry *, umode_t, bool); | |
358 | int nfs_mkdir(struct inode *, struct dentry *, umode_t); | |
359 | int nfs_rmdir(struct inode *, struct dentry *); | |
360 | int nfs_unlink(struct inode *, struct dentry *); | |
361 | int nfs_symlink(struct inode *, struct dentry *, const char *); | |
362 | int nfs_link(struct dentry *, struct inode *, struct dentry *); | |
363 | int nfs_mknod(struct inode *, struct dentry *, umode_t, dev_t); | |
1cd66c93 MS |
364 | int nfs_rename(struct inode *, struct dentry *, |
365 | struct inode *, struct dentry *, unsigned int); | |
979df72e | 366 | |
ce4ef7c0 | 367 | /* file.c */ |
4ff79bc7 | 368 | int nfs_file_fsync(struct file *file, loff_t start, loff_t end, int datasync); |
ce4ef7c0 | 369 | loff_t nfs_file_llseek(struct file *, loff_t, int); |
3aa2d199 | 370 | ssize_t nfs_file_read(struct kiocb *, struct iov_iter *); |
ce4ef7c0 | 371 | int nfs_file_mmap(struct file *, struct vm_area_struct *); |
edaf4369 | 372 | ssize_t nfs_file_write(struct kiocb *, struct iov_iter *); |
ce4ef7c0 BS |
373 | int nfs_file_release(struct inode *, struct file *); |
374 | int nfs_lock(struct file *, int, struct file_lock *); | |
375 | int nfs_flock(struct file *, int, struct file_lock *); | |
ce4ef7c0 | 376 | int nfs_check_flags(int); |
ce4ef7c0 | 377 | |
f7b422b1 | 378 | /* inode.c */ |
5746006f | 379 | extern struct workqueue_struct *nfsiod_workqueue; |
f7b422b1 DH |
380 | extern struct inode *nfs_alloc_inode(struct super_block *sb); |
381 | extern void nfs_destroy_inode(struct inode *); | |
a9185b41 | 382 | extern int nfs_write_inode(struct inode *, struct writeback_control *); |
eed99357 | 383 | extern int nfs_drop_inode(struct inode *); |
19d87ca3 | 384 | extern void nfs_clear_inode(struct inode *); |
b57922d9 | 385 | extern void nfs_evict_inode(struct inode *); |
f41f7418 | 386 | void nfs_zap_acl_cache(struct inode *inode); |
61540bf6 | 387 | extern bool nfs_check_cache_invalid(struct inode *, unsigned long); |
dfd01f02 | 388 | extern int nfs_wait_bit_killable(struct wait_bit_key *key, int mode); |
210c7c17 | 389 | extern int nfs_wait_atomic_killable(atomic_t *p); |
f7b422b1 DH |
390 | |
391 | /* super.c */ | |
6a74490d | 392 | extern const struct super_operations nfs_sops; |
ab7017a3 | 393 | extern struct file_system_type nfs_fs_type; |
54ceac45 | 394 | extern struct file_system_type nfs_xdev_fs_type; |
89d77c8f | 395 | #if IS_ENABLED(CONFIG_NFS_V4) |
54ceac45 DH |
396 | extern struct file_system_type nfs4_xdev_fs_type; |
397 | extern struct file_system_type nfs4_referral_fs_type; | |
f7b422b1 | 398 | #endif |
4d4b69dd | 399 | bool nfs_auth_info_match(const struct nfs_auth_info *, rpc_authflavor_t); |
ff9099f2 BS |
400 | struct dentry *nfs_try_mount(int, const char *, struct nfs_mount_info *, |
401 | struct nfs_subversion *); | |
fbdefd64 BS |
402 | int nfs_set_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *); |
403 | int nfs_clone_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *); | |
ab7017a3 BS |
404 | struct dentry *nfs_fs_mount_common(struct nfs_server *, int, const char *, |
405 | struct nfs_mount_info *, struct nfs_subversion *); | |
fbdefd64 BS |
406 | struct dentry *nfs_fs_mount(struct file_system_type *, int, const char *, void *); |
407 | struct dentry * nfs_xdev_mount_common(struct file_system_type *, int, | |
408 | const char *, struct nfs_mount_info *); | |
409 | void nfs_kill_super(struct super_block *); | |
410 | void nfs_fill_super(struct super_block *, struct nfs_mount_info *); | |
4ebd9ab3 | 411 | |
f7b422b1 | 412 | extern struct rpc_stat nfs_rpcstat; |
4ebd9ab3 | 413 | |
f7b422b1 DH |
414 | extern int __init register_nfs_fs(void); |
415 | extern void __exit unregister_nfs_fs(void); | |
ea7c38fe | 416 | extern bool nfs_sb_active(struct super_block *sb); |
1daef0a8 | 417 | extern void nfs_sb_deactive(struct super_block *sb); |
f7b422b1 | 418 | |
a5864c99 TM |
419 | /* io.c */ |
420 | extern void nfs_start_io_read(struct inode *inode); | |
421 | extern void nfs_end_io_read(struct inode *inode); | |
422 | extern void nfs_start_io_write(struct inode *inode); | |
423 | extern void nfs_end_io_write(struct inode *inode); | |
424 | extern void nfs_start_io_direct(struct inode *inode); | |
425 | extern void nfs_end_io_direct(struct inode *inode); | |
426 | ||
651b0e70 TM |
427 | static inline bool nfs_file_io_is_buffered(struct nfs_inode *nfsi) |
428 | { | |
429 | return test_bit(NFS_INO_ODIRECT, &nfsi->flags) == 0; | |
430 | } | |
431 | ||
f7b422b1 | 432 | /* namespace.c */ |
97a54868 | 433 | #define NFS_PATH_CANONICAL 1 |
b514f872 | 434 | extern char *nfs_path(char **p, struct dentry *dentry, |
97a54868 | 435 | char *buffer, ssize_t buflen, unsigned flags); |
36d43a43 | 436 | extern struct vfsmount *nfs_d_automount(struct path *path); |
281cad46 BS |
437 | struct vfsmount *nfs_submount(struct nfs_server *, struct dentry *, |
438 | struct nfs_fh *, struct nfs_fattr *); | |
439 | struct vfsmount *nfs_do_submount(struct dentry *, struct nfs_fh *, | |
440 | struct nfs_fattr *, rpc_authflavor_t); | |
f7b422b1 | 441 | |
54ceac45 | 442 | /* getroot.c */ |
0d5839ad AV |
443 | extern struct dentry *nfs_get_root(struct super_block *, struct nfs_fh *, |
444 | const char *); | |
89d77c8f | 445 | #if IS_ENABLED(CONFIG_NFS_V4) |
0d5839ad AV |
446 | extern struct dentry *nfs4_get_root(struct super_block *, struct nfs_fh *, |
447 | const char *); | |
54ceac45 | 448 | |
5e6b1990 | 449 | extern int nfs4_get_rootfh(struct nfs_server *server, struct nfs_fh *mntfh, bool); |
7d4e2747 | 450 | #endif |
f7b422b1 | 451 | |
061ae2ed | 452 | struct nfs_pgio_completion_ops; |
f11c88af | 453 | /* read.c */ |
584aa810 | 454 | extern void nfs_pageio_init_read(struct nfs_pageio_descriptor *pgio, |
fab5fc25 | 455 | struct inode *inode, bool force_mds, |
584aa810 | 456 | const struct nfs_pgio_completion_ops *compl_ops); |
f11c88af | 457 | extern void nfs_read_prepare(struct rpc_task *task, void *calldata); |
493292dd | 458 | extern void nfs_pageio_reset_read_mds(struct nfs_pageio_descriptor *pgio); |
e885de1a | 459 | |
fbdefd64 | 460 | /* super.c */ |
fbdefd64 BS |
461 | void nfs_umount_begin(struct super_block *); |
462 | int nfs_statfs(struct dentry *, struct kstatfs *); | |
463 | int nfs_show_options(struct seq_file *, struct dentry *); | |
464 | int nfs_show_devname(struct seq_file *, struct dentry *); | |
465 | int nfs_show_path(struct seq_file *, struct dentry *); | |
466 | int nfs_show_stats(struct seq_file *, struct dentry *); | |
fbdefd64 BS |
467 | int nfs_remount(struct super_block *sb, int *flags, char *raw_data); |
468 | ||
def6ed7e | 469 | /* write.c */ |
1763da12 | 470 | extern void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio, |
a20c93e3 | 471 | struct inode *inode, int ioflags, bool force_mds, |
1763da12 | 472 | const struct nfs_pgio_completion_ops *compl_ops); |
dce81290 | 473 | extern void nfs_pageio_reset_write_mds(struct nfs_pageio_descriptor *pgio); |
0b7c0153 | 474 | extern void nfs_commit_free(struct nfs_commit_data *p); |
def6ed7e | 475 | extern void nfs_write_prepare(struct rpc_task *task, void *calldata); |
0b7c0153 FI |
476 | extern void nfs_commit_prepare(struct rpc_task *task, void *calldata); |
477 | extern int nfs_initiate_commit(struct rpc_clnt *clnt, | |
478 | struct nfs_commit_data *data, | |
c36aae9a | 479 | const struct nfs_rpc_ops *nfs_ops, |
e0c2b380 | 480 | const struct rpc_call_ops *call_ops, |
9f0ec176 | 481 | int how, int flags); |
0b7c0153 | 482 | extern void nfs_init_commit(struct nfs_commit_data *data, |
e0c2b380 | 483 | struct list_head *head, |
f453a54a FI |
484 | struct pnfs_layout_segment *lseg, |
485 | struct nfs_commit_info *cinfo); | |
1763da12 FI |
486 | int nfs_scan_commit_list(struct list_head *src, struct list_head *dst, |
487 | struct nfs_commit_info *cinfo, int max); | |
ce59515c | 488 | unsigned long nfs_reqs_to_commit(struct nfs_commit_info *); |
1763da12 FI |
489 | int nfs_scan_commit(struct inode *inode, struct list_head *dst, |
490 | struct nfs_commit_info *cinfo); | |
491 | void nfs_mark_request_commit(struct nfs_page *req, | |
492 | struct pnfs_layout_segment *lseg, | |
b57ff130 WAA |
493 | struct nfs_commit_info *cinfo, |
494 | u32 ds_commit_idx); | |
c65e6254 | 495 | int nfs_write_need_commit(struct nfs_pgio_header *); |
a08a8cd3 | 496 | void nfs_writeback_update_inode(struct nfs_pgio_header *hdr); |
1763da12 FI |
497 | int nfs_generic_commit_list(struct inode *inode, struct list_head *head, |
498 | int how, struct nfs_commit_info *cinfo); | |
e0c2b380 | 499 | void nfs_retry_commit(struct list_head *page_list, |
ea2cf228 | 500 | struct pnfs_layout_segment *lseg, |
b57ff130 WAA |
501 | struct nfs_commit_info *cinfo, |
502 | u32 ds_commit_idx); | |
0b7c0153 | 503 | void nfs_commitdata_release(struct nfs_commit_data *data); |
6272dcc6 | 504 | void nfs_request_add_commit_list(struct nfs_page *req, |
ea2cf228 | 505 | struct nfs_commit_info *cinfo); |
86d80f97 TM |
506 | void nfs_request_add_commit_list_locked(struct nfs_page *req, |
507 | struct list_head *dst, | |
508 | struct nfs_commit_info *cinfo); | |
ea2cf228 FI |
509 | void nfs_request_remove_commit_list(struct nfs_page *req, |
510 | struct nfs_commit_info *cinfo); | |
511 | void nfs_init_cinfo(struct nfs_commit_info *cinfo, | |
512 | struct inode *inode, | |
513 | struct nfs_direct_req *dreq); | |
dc24826b | 514 | int nfs_key_timeout_notify(struct file *filp, struct inode *inode); |
ce52914e | 515 | bool nfs_ctx_key_to_expire(struct nfs_open_context *ctx, struct inode *inode); |
a7d42ddb | 516 | void nfs_pageio_stop_mirroring(struct nfs_pageio_descriptor *pgio); |
e0c2b380 | 517 | |
837bb1d7 TM |
518 | int nfs_filemap_write_and_wait_range(struct address_space *mapping, |
519 | loff_t lstart, loff_t lend); | |
520 | ||
a5314a74 TM |
521 | #ifdef CONFIG_NFS_V4_1 |
522 | static inline | |
523 | void nfs_clear_pnfs_ds_commit_verifiers(struct pnfs_ds_commit_info *cinfo) | |
524 | { | |
525 | int i; | |
526 | ||
527 | for (i = 0; i < cinfo->nbuckets; i++) | |
528 | cinfo->buckets[i].direct_verf.committed = NFS_INVALID_STABLE_HOW; | |
529 | } | |
530 | #else | |
531 | static inline | |
532 | void nfs_clear_pnfs_ds_commit_verifiers(struct pnfs_ds_commit_info *cinfo) | |
533 | { | |
534 | } | |
535 | #endif | |
536 | ||
074cc1de TM |
537 | #ifdef CONFIG_MIGRATION |
538 | extern int nfs_migrate_page(struct address_space *, | |
a6bc32b8 | 539 | struct page *, struct page *, enum migrate_mode); |
074cc1de | 540 | #endif |
def6ed7e | 541 | |
8fc3c386 TM |
542 | static inline int |
543 | nfs_write_verifier_cmp(const struct nfs_write_verifier *v1, | |
544 | const struct nfs_write_verifier *v2) | |
545 | { | |
546 | return memcmp(v1->data, v2->data, sizeof(v1->data)); | |
547 | } | |
548 | ||
0e862a40 JL |
549 | /* unlink.c */ |
550 | extern struct rpc_task * | |
551 | nfs_async_rename(struct inode *old_dir, struct inode *new_dir, | |
552 | struct dentry *old_dentry, struct dentry *new_dentry, | |
553 | void (*complete)(struct rpc_task *, struct nfs_renamedata *)); | |
554 | extern int nfs_sillyrename(struct inode *dir, struct dentry *dentry); | |
555 | ||
1763da12 FI |
556 | /* direct.c */ |
557 | void nfs_init_cinfo_from_dreq(struct nfs_commit_info *cinfo, | |
558 | struct nfs_direct_req *dreq); | |
6296556f | 559 | extern ssize_t nfs_dreq_bytes_left(struct nfs_direct_req *dreq); |
1763da12 | 560 | |
cccef3b9 | 561 | /* nfs4proc.c */ |
8cab4c39 | 562 | extern struct nfs_client *nfs4_init_client(struct nfs_client *clp, |
5c6e5b60 | 563 | const struct nfs_client_initdata *); |
05f4c350 CL |
564 | extern int nfs40_walk_client_list(struct nfs_client *clp, |
565 | struct nfs_client **result, | |
566 | struct rpc_cred *cred); | |
567 | extern int nfs41_walk_client_list(struct nfs_client *clp, | |
568 | struct nfs_client **result, | |
569 | struct rpc_cred *cred); | |
04fa2c6b AA |
570 | extern int nfs4_test_session_trunk(struct rpc_clnt *, |
571 | struct rpc_xprt *, | |
572 | void *); | |
cccef3b9 | 573 | |
ea7c38fe TM |
574 | static inline struct inode *nfs_igrab_and_active(struct inode *inode) |
575 | { | |
576 | inode = igrab(inode); | |
577 | if (inode != NULL && !nfs_sb_active(inode->i_sb)) { | |
578 | iput(inode); | |
579 | inode = NULL; | |
580 | } | |
581 | return inode; | |
582 | } | |
583 | ||
584 | static inline void nfs_iput_and_deactive(struct inode *inode) | |
585 | { | |
586 | if (inode != NULL) { | |
587 | struct super_block *sb = inode->i_sb; | |
588 | ||
589 | iput(inode); | |
590 | nfs_sb_deactive(sb); | |
591 | } | |
592 | } | |
593 | ||
f7b422b1 DH |
594 | /* |
595 | * Determine the device name as a string | |
596 | */ | |
b514f872 | 597 | static inline char *nfs_devname(struct dentry *dentry, |
54ceac45 | 598 | char *buffer, ssize_t buflen) |
f7b422b1 | 599 | { |
b514f872 | 600 | char *dummy; |
97a54868 | 601 | return nfs_path(&dummy, dentry, buffer, buflen, NFS_PATH_CANONICAL); |
f7b422b1 DH |
602 | } |
603 | ||
604 | /* | |
605 | * Determine the actual block size (and log2 thereof) | |
606 | */ | |
607 | static inline | |
608 | unsigned long nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp) | |
609 | { | |
610 | /* make sure blocksize is a power of two */ | |
611 | if ((bsize & (bsize - 1)) || nrbitsp) { | |
612 | unsigned char nrbits; | |
613 | ||
614 | for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--) | |
615 | ; | |
616 | bsize = 1 << nrbits; | |
617 | if (nrbitsp) | |
618 | *nrbitsp = nrbits; | |
619 | } | |
620 | ||
621 | return bsize; | |
622 | } | |
623 | ||
624 | /* | |
625 | * Calculate the number of 512byte blocks used. | |
626 | */ | |
9eaa67c6 | 627 | static inline blkcnt_t nfs_calc_block_size(u64 tsize) |
f7b422b1 | 628 | { |
9eaa67c6 | 629 | blkcnt_t used = (tsize + 511) >> 9; |
f7b422b1 DH |
630 | return (used > ULONG_MAX) ? ULONG_MAX : used; |
631 | } | |
632 | ||
633 | /* | |
634 | * Compute and set NFS server blocksize | |
635 | */ | |
636 | static inline | |
637 | unsigned long nfs_block_size(unsigned long bsize, unsigned char *nrbitsp) | |
638 | { | |
639 | if (bsize < NFS_MIN_FILE_IO_SIZE) | |
640 | bsize = NFS_DEF_FILE_IO_SIZE; | |
641 | else if (bsize >= NFS_MAX_FILE_IO_SIZE) | |
642 | bsize = NFS_MAX_FILE_IO_SIZE; | |
643 | ||
644 | return nfs_block_bits(bsize, nrbitsp); | |
645 | } | |
646 | ||
647 | /* | |
648 | * Determine the maximum file size for a superblock | |
649 | */ | |
650 | static inline | |
651 | void nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize) | |
652 | { | |
653 | sb->s_maxbytes = (loff_t)maxfilesize; | |
654 | if (sb->s_maxbytes > MAX_LFS_FILESIZE || sb->s_maxbytes <= 0) | |
655 | sb->s_maxbytes = MAX_LFS_FILESIZE; | |
656 | } | |
49a70f27 | 657 | |
d15bc38d TH |
658 | /* |
659 | * Record the page as unstable and mark its inode as dirty. | |
660 | */ | |
661 | static inline | |
86d80f97 | 662 | void nfs_mark_page_unstable(struct page *page, struct nfs_commit_info *cinfo) |
d15bc38d | 663 | { |
86d80f97 TM |
664 | if (!cinfo->dreq) { |
665 | struct inode *inode = page_file_mapping(page)->host; | |
d15bc38d | 666 | |
11fb9989 | 667 | inc_node_page_state(page, NR_UNSTABLE_NFS); |
86d80f97 TM |
668 | inc_wb_stat(&inode_to_bdi(inode)->wb, WB_RECLAIMABLE); |
669 | __mark_inode_dirty(inode, I_DIRTY_DATASYNC); | |
670 | } | |
d15bc38d TH |
671 | } |
672 | ||
49a70f27 TM |
673 | /* |
674 | * Determine the number of bytes of data the page contains | |
675 | */ | |
676 | static inline | |
677 | unsigned int nfs_page_length(struct page *page) | |
678 | { | |
d56b4ddf | 679 | loff_t i_size = i_size_read(page_file_mapping(page)->host); |
49a70f27 TM |
680 | |
681 | if (i_size > 0) { | |
8cd79788 | 682 | pgoff_t index = page_index(page); |
09cbfeaf | 683 | pgoff_t end_index = (i_size - 1) >> PAGE_SHIFT; |
8cd79788 | 684 | if (index < end_index) |
09cbfeaf | 685 | return PAGE_SIZE; |
8cd79788 | 686 | if (index == end_index) |
09cbfeaf | 687 | return ((i_size - 1) & ~PAGE_MASK) + 1; |
49a70f27 TM |
688 | } |
689 | return 0; | |
690 | } | |
8d5658c9 | 691 | |
0b26a0bf TM |
692 | /* |
693 | * Convert a umode to a dirent->d_type | |
694 | */ | |
695 | static inline | |
696 | unsigned char nfs_umode_to_dtype(umode_t mode) | |
697 | { | |
698 | return (mode >> 12) & 15; | |
699 | } | |
700 | ||
8d5658c9 TM |
701 | /* |
702 | * Determine the number of pages in an array of length 'len' and | |
703 | * with a base offset of 'base' | |
704 | */ | |
705 | static inline | |
706 | unsigned int nfs_page_array_len(unsigned int base, size_t len) | |
707 | { | |
708 | return ((unsigned long)len + (unsigned long)base + | |
709 | PAGE_SIZE - 1) >> PAGE_SHIFT; | |
710 | } | |
0110ee15 | 711 | |
3a1556e8 TM |
712 | /* |
713 | * Convert a struct timespec into a 64-bit change attribute | |
714 | * | |
715 | * This does approximately the same thing as timespec_to_ns(), | |
716 | * but for calculation efficiency, we multiply the seconds by | |
717 | * 1024*1024*1024. | |
718 | */ | |
719 | static inline | |
720 | u64 nfs_timespec_to_change_attr(const struct timespec *ts) | |
721 | { | |
722 | return ((u64)ts->tv_sec << 30) + ts->tv_nsec; | |
723 | } | |
1264a2f0 TM |
724 | |
725 | #ifdef CONFIG_CRC32 | |
726 | /** | |
727 | * nfs_fhandle_hash - calculate the crc32 hash for the filehandle | |
728 | * @fh - pointer to filehandle | |
729 | * | |
730 | * returns a crc32 hash for the filehandle that is compatible with | |
731 | * the one displayed by "wireshark". | |
732 | */ | |
733 | static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh) | |
734 | { | |
735 | return ~crc32_le(0xFFFFFFFF, &fh->data[0], fh->size); | |
736 | } | |
48c9579a OK |
737 | static inline u32 nfs_stateid_hash(const nfs4_stateid *stateid) |
738 | { | |
739 | return ~crc32_le(0xFFFFFFFF, &stateid->other[0], | |
740 | NFS4_STATEID_OTHER_SIZE); | |
741 | } | |
1264a2f0 TM |
742 | #else |
743 | static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh) | |
744 | { | |
745 | return 0; | |
746 | } | |
48c9579a OK |
747 | static inline u32 nfs_stateid_hash(nfs4_stateid *stateid) |
748 | { | |
749 | return 0; | |
750 | } | |
1264a2f0 | 751 | #endif |
0bcbf039 PT |
752 | |
753 | static inline bool nfs_error_is_fatal(int err) | |
754 | { | |
755 | switch (err) { | |
756 | case -ERESTARTSYS: | |
54551d85 TM |
757 | case -EACCES: |
758 | case -EDQUOT: | |
759 | case -EFBIG: | |
0bcbf039 PT |
760 | case -EIO: |
761 | case -ENOSPC: | |
762 | case -EROFS: | |
54551d85 | 763 | case -ESTALE: |
0bcbf039 PT |
764 | case -E2BIG: |
765 | return true; | |
766 | default: | |
767 | return false; | |
768 | } | |
769 | } |