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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> |
1264a2f0 | 8 | #include <linux/crc32.h> |
47af81f2 | 9 | #include <linux/nfs_page.h> |
f7b422b1 | 10 | |
08734048 DH |
11 | #define NFS_MS_MASK (MS_RDONLY|MS_NOSUID|MS_NODEV|MS_NOEXEC|MS_SYNCHRONOUS) |
12 | ||
54ceac45 | 13 | struct nfs_string; |
54ceac45 DH |
14 | |
15 | /* Maximum number of readahead requests | |
16 | * FIXME: this should really be a sysctl so that users may tune it to suit | |
17 | * their needs. People that do NFS over a slow network, might for | |
18 | * instance want to reduce it to something closer to 1 for improved | |
19 | * interactive response. | |
20 | */ | |
21 | #define NFS_MAX_READAHEAD (RPC_DEF_SLOT_TABLE - 1) | |
22 | ||
7ebb9315 BS |
23 | static inline void nfs_attr_check_mountpoint(struct super_block *parent, struct nfs_fattr *fattr) |
24 | { | |
25 | if (!nfs_fsid_equal(&NFS_SB(parent)->fsid, &fattr->fsid)) | |
26 | fattr->valid |= NFS_ATTR_FATTR_MOUNTPOINT; | |
27 | } | |
28 | ||
533eb461 AA |
29 | static inline int nfs_attr_use_mounted_on_fileid(struct nfs_fattr *fattr) |
30 | { | |
31 | if (((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) == 0) || | |
32 | (((fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT) == 0) && | |
33 | ((fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) == 0))) | |
34 | return 0; | |
533eb461 AA |
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 | ||
a956beda TM |
61 | #define NFS_UNSPEC_RETRANS (UINT_MAX) |
62 | #define NFS_UNSPEC_TIMEO (UINT_MAX) | |
63 | ||
56e4ebf8 BS |
64 | /* |
65 | * Maximum number of pages that readdir can use for creating | |
66 | * a vmapped array of pages. | |
67 | */ | |
68 | #define NFS_MAX_READDIR_PAGES 8 | |
69 | ||
fcf10398 BS |
70 | struct nfs_client_initdata { |
71 | unsigned long init_flags; | |
5c6e5b60 TM |
72 | const char *hostname; /* Hostname of the server */ |
73 | const struct sockaddr *addr; /* Address of the server */ | |
74 | const char *nodename; /* Hostname of the client */ | |
75 | const char *ip_addr; /* IP address of the client */ | |
fcf10398 | 76 | size_t addrlen; |
ab7017a3 | 77 | struct nfs_subversion *nfs_mod; |
fcf10398 BS |
78 | int proto; |
79 | u32 minorversion; | |
80 | struct net *net; | |
5c6e5b60 | 81 | const struct rpc_timeout *timeparms; |
fcf10398 BS |
82 | }; |
83 | ||
6b18eaa0 TT |
84 | /* |
85 | * In-kernel mount arguments | |
86 | */ | |
87 | struct nfs_parsed_mount_data { | |
88 | int flags; | |
8cb7f74e CL |
89 | unsigned int rsize, wsize; |
90 | unsigned int timeo, retrans; | |
91 | unsigned int acregmin, acregmax, | |
6b18eaa0 | 92 | acdirmin, acdirmax; |
8cb7f74e | 93 | unsigned int namlen; |
b797cac7 | 94 | unsigned int options; |
6b18eaa0 | 95 | unsigned int bsize; |
a3f73c27 WAA |
96 | struct nfs_auth_info auth_info; |
97 | rpc_authflavor_t selected_flavor; | |
6b18eaa0 | 98 | char *client_address; |
764302cc | 99 | unsigned int version; |
3fd5be9e | 100 | unsigned int minorversion; |
08734048 | 101 | char *fscache_uniq; |
b72e4f42 | 102 | bool need_mount; |
6b18eaa0 TT |
103 | |
104 | struct { | |
4c568017 CL |
105 | struct sockaddr_storage address; |
106 | size_t addrlen; | |
6b18eaa0 | 107 | char *hostname; |
78fa701f | 108 | u32 version; |
4cfd74fc | 109 | int port; |
78fa701f | 110 | unsigned short protocol; |
6b18eaa0 TT |
111 | } mount_server; |
112 | ||
113 | struct { | |
4c568017 CL |
114 | struct sockaddr_storage address; |
115 | size_t addrlen; | |
6b18eaa0 TT |
116 | char *hostname; |
117 | char *export_path; | |
4cfd74fc | 118 | int port; |
78fa701f | 119 | unsigned short protocol; |
6b18eaa0 | 120 | } nfs_server; |
f9c3a380 EP |
121 | |
122 | struct security_mnt_opts lsm_opts; | |
e50a7a1a | 123 | struct net *net; |
6b18eaa0 TT |
124 | }; |
125 | ||
146ec944 | 126 | /* mount_clnt.c */ |
c5d120f8 CL |
127 | struct nfs_mount_request { |
128 | struct sockaddr *sap; | |
129 | size_t salen; | |
130 | char *hostname; | |
131 | char *dirpath; | |
132 | u32 version; | |
133 | unsigned short protocol; | |
134 | struct nfs_fh *fh; | |
50a737f8 | 135 | int noresvport; |
8e02f6b9 CL |
136 | unsigned int *auth_flav_len; |
137 | rpc_authflavor_t *auth_flavs; | |
6d59b8d5 | 138 | struct net *net; |
c5d120f8 CL |
139 | }; |
140 | ||
fbdefd64 BS |
141 | struct nfs_mount_info { |
142 | void (*fill_super)(struct super_block *, struct nfs_mount_info *); | |
143 | int (*set_security)(struct super_block *, struct dentry *, struct nfs_mount_info *); | |
144 | struct nfs_parsed_mount_data *parsed; | |
145 | struct nfs_clone_mount *cloned; | |
146 | struct nfs_fh *mntfh; | |
147 | }; | |
148 | ||
c5d120f8 | 149 | extern int nfs_mount(struct nfs_mount_request *info); |
0b524123 | 150 | extern void nfs_umount(const struct nfs_mount_request *info); |
146ec944 | 151 | |
24c8dbbb | 152 | /* client.c */ |
a613fa16 | 153 | extern const struct rpc_program nfs_program; |
6b13168b | 154 | extern void nfs_clients_init(struct net *net); |
6663ee7f | 155 | extern struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *); |
5c6e5b60 | 156 | int nfs_create_rpc_client(struct nfs_client *, const struct nfs_client_initdata *, rpc_authflavor_t); |
fcf10398 | 157 | struct nfs_client *nfs_get_client(const struct nfs_client_initdata *, |
fcf10398 BS |
158 | rpc_authflavor_t); |
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); | |
4697bd5e | 190 | extern int nfs_wait_client_init_complete(const struct nfs_client *clp); |
76db6d95 | 191 | extern void nfs_mark_client_ready(struct nfs_client *clp, int state); |
3fc75f12 | 192 | extern struct nfs_client *nfs4_set_ds_client(struct nfs_server *mds_srv, |
d83217c1 | 193 | const struct sockaddr *ds_addr, |
98fc685a AA |
194 | int ds_addrlen, int ds_proto, |
195 | unsigned int ds_timeo, | |
064172f3 | 196 | unsigned int ds_retrans, |
30626f9c | 197 | u32 minor_version, |
064172f3 | 198 | rpc_authflavor_t au_flavor); |
0e20162e AA |
199 | extern struct rpc_clnt *nfs4_find_or_create_ds_client(struct nfs_client *, |
200 | struct inode *); | |
b224f7cb | 201 | extern struct nfs_client *nfs3_set_ds_client(struct nfs_server *mds_srv, |
1a04c6e1 PT |
202 | const struct sockaddr *ds_addr, int ds_addrlen, |
203 | int ds_proto, unsigned int ds_timeo, | |
204 | unsigned int ds_retrans, rpc_authflavor_t au_flavor); | |
6aaca566 DH |
205 | #ifdef CONFIG_PROC_FS |
206 | extern int __init nfs_fs_proc_init(void); | |
207 | extern void nfs_fs_proc_exit(void); | |
65b38851 EB |
208 | extern int nfs_fs_proc_net_init(struct net *net); |
209 | extern void nfs_fs_proc_net_exit(struct net *net); | |
6aaca566 | 210 | #else |
65b38851 EB |
211 | static inline int nfs_fs_proc_net_init(struct net *net) |
212 | { | |
213 | return 0; | |
214 | } | |
215 | static inline void nfs_fs_proc_net_exit(struct net *net) | |
216 | { | |
217 | } | |
6aaca566 DH |
218 | static inline int nfs_fs_proc_init(void) |
219 | { | |
220 | return 0; | |
221 | } | |
222 | static inline void nfs_fs_proc_exit(void) | |
223 | { | |
224 | } | |
225 | #endif | |
24c8dbbb | 226 | |
f7b422b1 DH |
227 | /* callback_xdr.c */ |
228 | extern struct svc_version nfs4_callback_version1; | |
07bccc2d | 229 | extern struct svc_version nfs4_callback_version4; |
f7b422b1 | 230 | |
4db6e0b7 | 231 | struct nfs_pageio_descriptor; |
f7b422b1 DH |
232 | /* pagelist.c */ |
233 | extern int __init nfs_init_nfspagecache(void); | |
266bee88 | 234 | extern void nfs_destroy_nfspagecache(void); |
f7b422b1 | 235 | extern int __init nfs_init_readpagecache(void); |
266bee88 | 236 | extern void nfs_destroy_readpagecache(void); |
f7b422b1 | 237 | extern int __init nfs_init_writepagecache(void); |
266bee88 | 238 | extern void nfs_destroy_writepagecache(void); |
f7b422b1 | 239 | |
f7b422b1 | 240 | extern int __init nfs_init_directcache(void); |
266bee88 | 241 | extern void nfs_destroy_directcache(void); |
4db6e0b7 FI |
242 | extern void nfs_pgheader_init(struct nfs_pageio_descriptor *desc, |
243 | struct nfs_pgio_header *hdr, | |
244 | void (*release)(struct nfs_pgio_header *hdr)); | |
245 | void nfs_set_pgio_error(struct nfs_pgio_header *hdr, int error, loff_t pos); | |
210c7c17 | 246 | int nfs_iocounter_wait(struct nfs_lock_context *l_ctx); |
577b4232 | 247 | |
41d8d5b7 | 248 | extern const struct nfs_pageio_ops nfs_pgio_rw_ops; |
1e7f3a48 WAA |
249 | struct nfs_pgio_header *nfs_pgio_header_alloc(const struct nfs_rw_ops *); |
250 | void nfs_pgio_header_free(struct nfs_pgio_header *); | |
d45f60c6 | 251 | void nfs_pgio_data_destroy(struct nfs_pgio_header *); |
ef2c488c | 252 | int nfs_generic_pgio(struct nfs_pageio_descriptor *, struct nfs_pgio_header *); |
46a5ab47 PT |
253 | int nfs_initiate_pgio(struct rpc_clnt *clnt, struct nfs_pgio_header *hdr, |
254 | struct rpc_cred *cred, const struct nfs_rpc_ops *rpc_ops, | |
255 | const struct rpc_call_ops *call_ops, int how, int flags); | |
d4581383 | 256 | void nfs_free_request(struct nfs_page *req); |
48d635f1 PT |
257 | struct nfs_pgio_mirror * |
258 | nfs_pgio_current_mirror(struct nfs_pageio_descriptor *desc); | |
00bfa30a | 259 | |
47af81f2 PT |
260 | static inline bool nfs_pgio_has_mirroring(struct nfs_pageio_descriptor *desc) |
261 | { | |
262 | WARN_ON_ONCE(desc->pg_mirror_count < 1); | |
263 | return desc->pg_mirror_count > 1; | |
264 | } | |
265 | ||
138a2935 TM |
266 | static inline bool nfs_match_open_context(const struct nfs_open_context *ctx1, |
267 | const struct nfs_open_context *ctx2) | |
268 | { | |
269 | return ctx1->cred == ctx2->cred && ctx1->state == ctx2->state; | |
270 | } | |
271 | ||
f7b422b1 DH |
272 | /* nfs2xdr.c */ |
273 | extern struct rpc_procinfo nfs_procedures[]; | |
573c4e1e CL |
274 | extern int nfs2_decode_dirent(struct xdr_stream *, |
275 | struct nfs_entry *, int); | |
f7b422b1 DH |
276 | |
277 | /* nfs3xdr.c */ | |
278 | extern struct rpc_procinfo nfs3_procedures[]; | |
573c4e1e CL |
279 | extern int nfs3_decode_dirent(struct xdr_stream *, |
280 | struct nfs_entry *, int); | |
f7b422b1 DH |
281 | |
282 | /* nfs4xdr.c */ | |
89d77c8f | 283 | #if IS_ENABLED(CONFIG_NFS_V4) |
573c4e1e CL |
284 | extern int nfs4_decode_dirent(struct xdr_stream *, |
285 | struct nfs_entry *, int); | |
7d4e2747 | 286 | #endif |
2449ea2e AB |
287 | #ifdef CONFIG_NFS_V4_1 |
288 | extern const u32 nfs41_maxread_overhead; | |
289 | extern const u32 nfs41_maxwrite_overhead; | |
f1c097be | 290 | extern const u32 nfs41_maxgetdevinfo_overhead; |
2449ea2e | 291 | #endif |
f7b422b1 DH |
292 | |
293 | /* nfs4proc.c */ | |
89d77c8f | 294 | #if IS_ENABLED(CONFIG_NFS_V4) |
f7b422b1 | 295 | extern struct rpc_procinfo nfs4_procedures[]; |
d75d5414 | 296 | #endif |
f7b422b1 | 297 | |
694e096f AS |
298 | #ifdef CONFIG_NFS_V4_SECURITY_LABEL |
299 | extern struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags); | |
a49c2691 KM |
300 | static inline struct nfs4_label * |
301 | nfs4_label_copy(struct nfs4_label *dst, struct nfs4_label *src) | |
302 | { | |
303 | if (!dst || !src) | |
304 | return NULL; | |
305 | ||
306 | if (src->len > NFS4_MAXLABELLEN) | |
307 | return NULL; | |
308 | ||
309 | dst->lfs = src->lfs; | |
310 | dst->pi = src->pi; | |
311 | dst->len = src->len; | |
312 | memcpy(dst->label, src->label, src->len); | |
313 | ||
314 | return dst; | |
315 | } | |
694e096f AS |
316 | static inline void nfs4_label_free(struct nfs4_label *label) |
317 | { | |
318 | if (label) { | |
319 | kfree(label->label); | |
320 | kfree(label); | |
321 | } | |
322 | return; | |
323 | } | |
fd1defc2 TM |
324 | |
325 | static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi) | |
326 | { | |
327 | if (nfs_server_capable(&nfsi->vfs_inode, NFS_CAP_SECURITY_LABEL)) | |
328 | nfsi->cache_validity |= NFS_INO_INVALID_LABEL; | |
329 | } | |
694e096f AS |
330 | #else |
331 | static inline struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags) { return NULL; } | |
332 | static inline void nfs4_label_free(void *label) {} | |
fd1defc2 TM |
333 | static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi) |
334 | { | |
335 | } | |
a49c2691 KM |
336 | static inline struct nfs4_label * |
337 | nfs4_label_copy(struct nfs4_label *dst, struct nfs4_label *src) | |
338 | { | |
339 | return NULL; | |
340 | } | |
694e096f AS |
341 | #endif /* CONFIG_NFS_V4_SECURITY_LABEL */ |
342 | ||
7fe5c398 TM |
343 | /* proc.c */ |
344 | void nfs_close_context(struct nfs_open_context *ctx, int is_sync); | |
8cab4c39 | 345 | extern struct nfs_client *nfs_init_client(struct nfs_client *clp, |
5c6e5b60 | 346 | const struct nfs_client_initdata *); |
7fe5c398 | 347 | |
979df72e | 348 | /* dir.c */ |
311324ad | 349 | extern void nfs_force_use_readdirplus(struct inode *dir); |
1ab6c499 DC |
350 | extern unsigned long nfs_access_cache_count(struct shrinker *shrink, |
351 | struct shrink_control *sc); | |
352 | extern unsigned long nfs_access_cache_scan(struct shrinker *shrink, | |
353 | struct shrink_control *sc); | |
597d9289 BS |
354 | struct dentry *nfs_lookup(struct inode *, struct dentry *, unsigned int); |
355 | int nfs_create(struct inode *, struct dentry *, umode_t, bool); | |
356 | int nfs_mkdir(struct inode *, struct dentry *, umode_t); | |
357 | int nfs_rmdir(struct inode *, struct dentry *); | |
358 | int nfs_unlink(struct inode *, struct dentry *); | |
359 | int nfs_symlink(struct inode *, struct dentry *, const char *); | |
360 | int nfs_link(struct dentry *, struct inode *, struct dentry *); | |
361 | int nfs_mknod(struct inode *, struct dentry *, umode_t, dev_t); | |
362 | int nfs_rename(struct inode *, struct dentry *, struct inode *, struct dentry *); | |
979df72e | 363 | |
ce4ef7c0 | 364 | /* file.c */ |
4ff79bc7 | 365 | int nfs_file_fsync(struct file *file, loff_t start, loff_t end, int datasync); |
ce4ef7c0 | 366 | loff_t nfs_file_llseek(struct file *, loff_t, int); |
3aa2d199 | 367 | ssize_t nfs_file_read(struct kiocb *, struct iov_iter *); |
ce4ef7c0 BS |
368 | ssize_t nfs_file_splice_read(struct file *, loff_t *, struct pipe_inode_info *, |
369 | size_t, unsigned int); | |
370 | int nfs_file_mmap(struct file *, struct vm_area_struct *); | |
edaf4369 | 371 | ssize_t nfs_file_write(struct kiocb *, struct iov_iter *); |
ce4ef7c0 BS |
372 | int nfs_file_release(struct inode *, struct file *); |
373 | int nfs_lock(struct file *, int, struct file_lock *); | |
374 | int nfs_flock(struct file *, int, struct file_lock *); | |
ce4ef7c0 | 375 | int nfs_check_flags(int); |
ce4ef7c0 | 376 | |
f7b422b1 | 377 | /* inode.c */ |
5746006f | 378 | extern struct workqueue_struct *nfsiod_workqueue; |
f7b422b1 DH |
379 | extern struct inode *nfs_alloc_inode(struct super_block *sb); |
380 | extern void nfs_destroy_inode(struct inode *); | |
a9185b41 | 381 | extern int nfs_write_inode(struct inode *, struct writeback_control *); |
eed99357 | 382 | extern int nfs_drop_inode(struct inode *); |
19d87ca3 | 383 | extern void nfs_clear_inode(struct inode *); |
b57922d9 | 384 | extern void nfs_evict_inode(struct inode *); |
f41f7418 | 385 | void nfs_zap_acl_cache(struct inode *inode); |
dfd01f02 | 386 | extern int nfs_wait_bit_killable(struct wait_bit_key *key, int mode); |
210c7c17 | 387 | extern int nfs_wait_atomic_killable(atomic_t *p); |
f7b422b1 DH |
388 | |
389 | /* super.c */ | |
6a74490d | 390 | extern const struct super_operations nfs_sops; |
ab7017a3 | 391 | extern struct file_system_type nfs_fs_type; |
54ceac45 | 392 | extern struct file_system_type nfs_xdev_fs_type; |
89d77c8f | 393 | #if IS_ENABLED(CONFIG_NFS_V4) |
54ceac45 DH |
394 | extern struct file_system_type nfs4_xdev_fs_type; |
395 | extern struct file_system_type nfs4_referral_fs_type; | |
f7b422b1 | 396 | #endif |
4d4b69dd | 397 | bool nfs_auth_info_match(const struct nfs_auth_info *, rpc_authflavor_t); |
ff9099f2 BS |
398 | struct dentry *nfs_try_mount(int, const char *, struct nfs_mount_info *, |
399 | struct nfs_subversion *); | |
fbdefd64 BS |
400 | void nfs_initialise_sb(struct super_block *); |
401 | int nfs_set_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *); | |
402 | int nfs_clone_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *); | |
ab7017a3 BS |
403 | struct dentry *nfs_fs_mount_common(struct nfs_server *, int, const char *, |
404 | struct nfs_mount_info *, struct nfs_subversion *); | |
fbdefd64 BS |
405 | struct dentry *nfs_fs_mount(struct file_system_type *, int, const char *, void *); |
406 | struct dentry * nfs_xdev_mount_common(struct file_system_type *, int, | |
407 | const char *, struct nfs_mount_info *); | |
408 | void nfs_kill_super(struct super_block *); | |
409 | void nfs_fill_super(struct super_block *, struct nfs_mount_info *); | |
4ebd9ab3 | 410 | |
f7b422b1 | 411 | extern struct rpc_stat nfs_rpcstat; |
4ebd9ab3 | 412 | |
f7b422b1 DH |
413 | extern int __init register_nfs_fs(void); |
414 | extern void __exit unregister_nfs_fs(void); | |
ea7c38fe | 415 | extern bool nfs_sb_active(struct super_block *sb); |
1daef0a8 | 416 | extern void nfs_sb_deactive(struct super_block *sb); |
f7b422b1 | 417 | |
a5864c99 TM |
418 | /* io.c */ |
419 | extern void nfs_start_io_read(struct inode *inode); | |
420 | extern void nfs_end_io_read(struct inode *inode); | |
421 | extern void nfs_start_io_write(struct inode *inode); | |
422 | extern void nfs_end_io_write(struct inode *inode); | |
423 | extern void nfs_start_io_direct(struct inode *inode); | |
424 | extern void nfs_end_io_direct(struct inode *inode); | |
425 | ||
651b0e70 TM |
426 | static inline bool nfs_file_io_is_buffered(struct nfs_inode *nfsi) |
427 | { | |
428 | return test_bit(NFS_INO_ODIRECT, &nfsi->flags) == 0; | |
429 | } | |
430 | ||
f7b422b1 | 431 | /* namespace.c */ |
97a54868 | 432 | #define NFS_PATH_CANONICAL 1 |
b514f872 | 433 | extern char *nfs_path(char **p, struct dentry *dentry, |
97a54868 | 434 | char *buffer, ssize_t buflen, unsigned flags); |
36d43a43 | 435 | extern struct vfsmount *nfs_d_automount(struct path *path); |
281cad46 BS |
436 | struct vfsmount *nfs_submount(struct nfs_server *, struct dentry *, |
437 | struct nfs_fh *, struct nfs_fattr *); | |
438 | struct vfsmount *nfs_do_submount(struct dentry *, struct nfs_fh *, | |
439 | struct nfs_fattr *, rpc_authflavor_t); | |
f7b422b1 | 440 | |
54ceac45 | 441 | /* getroot.c */ |
0d5839ad AV |
442 | extern struct dentry *nfs_get_root(struct super_block *, struct nfs_fh *, |
443 | const char *); | |
89d77c8f | 444 | #if IS_ENABLED(CONFIG_NFS_V4) |
0d5839ad AV |
445 | extern struct dentry *nfs4_get_root(struct super_block *, struct nfs_fh *, |
446 | const char *); | |
54ceac45 | 447 | |
5e6b1990 | 448 | extern int nfs4_get_rootfh(struct nfs_server *server, struct nfs_fh *mntfh, bool); |
7d4e2747 | 449 | #endif |
f7b422b1 | 450 | |
061ae2ed | 451 | struct nfs_pgio_completion_ops; |
f11c88af | 452 | /* read.c */ |
584aa810 | 453 | extern void nfs_pageio_init_read(struct nfs_pageio_descriptor *pgio, |
fab5fc25 | 454 | struct inode *inode, bool force_mds, |
584aa810 | 455 | const struct nfs_pgio_completion_ops *compl_ops); |
f11c88af | 456 | extern void nfs_read_prepare(struct rpc_task *task, void *calldata); |
493292dd | 457 | extern void nfs_pageio_reset_read_mds(struct nfs_pageio_descriptor *pgio); |
e885de1a | 458 | |
fbdefd64 BS |
459 | /* super.c */ |
460 | void nfs_clone_super(struct super_block *, struct nfs_mount_info *); | |
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); |
67911c8f | 497 | int nfs_commit_file(struct file *file, struct nfs_write_verifier *verf); |
1763da12 FI |
498 | int nfs_generic_commit_list(struct inode *inode, struct list_head *head, |
499 | int how, struct nfs_commit_info *cinfo); | |
e0c2b380 | 500 | void nfs_retry_commit(struct list_head *page_list, |
ea2cf228 | 501 | struct pnfs_layout_segment *lseg, |
b57ff130 WAA |
502 | struct nfs_commit_info *cinfo, |
503 | u32 ds_commit_idx); | |
0b7c0153 | 504 | void nfs_commitdata_release(struct nfs_commit_data *data); |
6272dcc6 | 505 | void nfs_request_add_commit_list(struct nfs_page *req, |
ea2cf228 | 506 | struct nfs_commit_info *cinfo); |
86d80f97 TM |
507 | void nfs_request_add_commit_list_locked(struct nfs_page *req, |
508 | struct list_head *dst, | |
509 | struct nfs_commit_info *cinfo); | |
ea2cf228 FI |
510 | void nfs_request_remove_commit_list(struct nfs_page *req, |
511 | struct nfs_commit_info *cinfo); | |
512 | void nfs_init_cinfo(struct nfs_commit_info *cinfo, | |
513 | struct inode *inode, | |
514 | struct nfs_direct_req *dreq); | |
dc24826b | 515 | int nfs_key_timeout_notify(struct file *filp, struct inode *inode); |
ce52914e | 516 | bool nfs_ctx_key_to_expire(struct nfs_open_context *ctx, struct inode *inode); |
a7d42ddb | 517 | void nfs_pageio_stop_mirroring(struct nfs_pageio_descriptor *pgio); |
e0c2b380 | 518 | |
837bb1d7 TM |
519 | int nfs_filemap_write_and_wait_range(struct address_space *mapping, |
520 | loff_t lstart, loff_t lend); | |
521 | ||
a5314a74 TM |
522 | #ifdef CONFIG_NFS_V4_1 |
523 | static inline | |
524 | void nfs_clear_pnfs_ds_commit_verifiers(struct pnfs_ds_commit_info *cinfo) | |
525 | { | |
526 | int i; | |
527 | ||
528 | for (i = 0; i < cinfo->nbuckets; i++) | |
529 | cinfo->buckets[i].direct_verf.committed = NFS_INVALID_STABLE_HOW; | |
530 | } | |
531 | #else | |
532 | static inline | |
533 | void nfs_clear_pnfs_ds_commit_verifiers(struct pnfs_ds_commit_info *cinfo) | |
534 | { | |
535 | } | |
536 | #endif | |
537 | ||
538 | ||
074cc1de TM |
539 | #ifdef CONFIG_MIGRATION |
540 | extern int nfs_migrate_page(struct address_space *, | |
a6bc32b8 | 541 | struct page *, struct page *, enum migrate_mode); |
074cc1de TM |
542 | #else |
543 | #define nfs_migrate_page NULL | |
544 | #endif | |
def6ed7e | 545 | |
8fc3c386 TM |
546 | static inline int |
547 | nfs_write_verifier_cmp(const struct nfs_write_verifier *v1, | |
548 | const struct nfs_write_verifier *v2) | |
549 | { | |
550 | return memcmp(v1->data, v2->data, sizeof(v1->data)); | |
551 | } | |
552 | ||
0e862a40 JL |
553 | /* unlink.c */ |
554 | extern struct rpc_task * | |
555 | nfs_async_rename(struct inode *old_dir, struct inode *new_dir, | |
556 | struct dentry *old_dentry, struct dentry *new_dentry, | |
557 | void (*complete)(struct rpc_task *, struct nfs_renamedata *)); | |
558 | extern int nfs_sillyrename(struct inode *dir, struct dentry *dentry); | |
559 | ||
1763da12 FI |
560 | /* direct.c */ |
561 | void nfs_init_cinfo_from_dreq(struct nfs_commit_info *cinfo, | |
562 | struct nfs_direct_req *dreq); | |
6296556f | 563 | extern ssize_t nfs_dreq_bytes_left(struct nfs_direct_req *dreq); |
1763da12 | 564 | |
cccef3b9 | 565 | /* nfs4proc.c */ |
d45f60c6 | 566 | extern void __nfs4_read_done_cb(struct nfs_pgio_header *); |
8cab4c39 | 567 | extern struct nfs_client *nfs4_init_client(struct nfs_client *clp, |
5c6e5b60 | 568 | const struct nfs_client_initdata *); |
05f4c350 CL |
569 | extern int nfs40_walk_client_list(struct nfs_client *clp, |
570 | struct nfs_client **result, | |
571 | struct rpc_cred *cred); | |
572 | extern int nfs41_walk_client_list(struct nfs_client *clp, | |
573 | struct nfs_client **result, | |
574 | struct rpc_cred *cred); | |
cccef3b9 | 575 | |
ea7c38fe TM |
576 | static inline struct inode *nfs_igrab_and_active(struct inode *inode) |
577 | { | |
578 | inode = igrab(inode); | |
579 | if (inode != NULL && !nfs_sb_active(inode->i_sb)) { | |
580 | iput(inode); | |
581 | inode = NULL; | |
582 | } | |
583 | return inode; | |
584 | } | |
585 | ||
586 | static inline void nfs_iput_and_deactive(struct inode *inode) | |
587 | { | |
588 | if (inode != NULL) { | |
589 | struct super_block *sb = inode->i_sb; | |
590 | ||
591 | iput(inode); | |
592 | nfs_sb_deactive(sb); | |
593 | } | |
594 | } | |
595 | ||
f7b422b1 DH |
596 | /* |
597 | * Determine the device name as a string | |
598 | */ | |
b514f872 | 599 | static inline char *nfs_devname(struct dentry *dentry, |
54ceac45 | 600 | char *buffer, ssize_t buflen) |
f7b422b1 | 601 | { |
b514f872 | 602 | char *dummy; |
97a54868 | 603 | return nfs_path(&dummy, dentry, buffer, buflen, NFS_PATH_CANONICAL); |
f7b422b1 DH |
604 | } |
605 | ||
606 | /* | |
607 | * Determine the actual block size (and log2 thereof) | |
608 | */ | |
609 | static inline | |
610 | unsigned long nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp) | |
611 | { | |
612 | /* make sure blocksize is a power of two */ | |
613 | if ((bsize & (bsize - 1)) || nrbitsp) { | |
614 | unsigned char nrbits; | |
615 | ||
616 | for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--) | |
617 | ; | |
618 | bsize = 1 << nrbits; | |
619 | if (nrbitsp) | |
620 | *nrbitsp = nrbits; | |
621 | } | |
622 | ||
623 | return bsize; | |
624 | } | |
625 | ||
626 | /* | |
627 | * Calculate the number of 512byte blocks used. | |
628 | */ | |
9eaa67c6 | 629 | static inline blkcnt_t nfs_calc_block_size(u64 tsize) |
f7b422b1 | 630 | { |
9eaa67c6 | 631 | blkcnt_t used = (tsize + 511) >> 9; |
f7b422b1 DH |
632 | return (used > ULONG_MAX) ? ULONG_MAX : used; |
633 | } | |
634 | ||
635 | /* | |
636 | * Compute and set NFS server blocksize | |
637 | */ | |
638 | static inline | |
639 | unsigned long nfs_block_size(unsigned long bsize, unsigned char *nrbitsp) | |
640 | { | |
641 | if (bsize < NFS_MIN_FILE_IO_SIZE) | |
642 | bsize = NFS_DEF_FILE_IO_SIZE; | |
643 | else if (bsize >= NFS_MAX_FILE_IO_SIZE) | |
644 | bsize = NFS_MAX_FILE_IO_SIZE; | |
645 | ||
646 | return nfs_block_bits(bsize, nrbitsp); | |
647 | } | |
648 | ||
649 | /* | |
650 | * Determine the maximum file size for a superblock | |
651 | */ | |
652 | static inline | |
653 | void nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize) | |
654 | { | |
655 | sb->s_maxbytes = (loff_t)maxfilesize; | |
656 | if (sb->s_maxbytes > MAX_LFS_FILESIZE || sb->s_maxbytes <= 0) | |
657 | sb->s_maxbytes = MAX_LFS_FILESIZE; | |
658 | } | |
49a70f27 | 659 | |
d15bc38d TH |
660 | /* |
661 | * Record the page as unstable and mark its inode as dirty. | |
662 | */ | |
663 | static inline | |
86d80f97 | 664 | void nfs_mark_page_unstable(struct page *page, struct nfs_commit_info *cinfo) |
d15bc38d | 665 | { |
86d80f97 TM |
666 | if (!cinfo->dreq) { |
667 | struct inode *inode = page_file_mapping(page)->host; | |
d15bc38d | 668 | |
11fb9989 | 669 | inc_node_page_state(page, NR_UNSTABLE_NFS); |
86d80f97 TM |
670 | inc_wb_stat(&inode_to_bdi(inode)->wb, WB_RECLAIMABLE); |
671 | __mark_inode_dirty(inode, I_DIRTY_DATASYNC); | |
672 | } | |
d15bc38d TH |
673 | } |
674 | ||
49a70f27 TM |
675 | /* |
676 | * Determine the number of bytes of data the page contains | |
677 | */ | |
678 | static inline | |
679 | unsigned int nfs_page_length(struct page *page) | |
680 | { | |
d56b4ddf | 681 | loff_t i_size = i_size_read(page_file_mapping(page)->host); |
49a70f27 TM |
682 | |
683 | if (i_size > 0) { | |
d56b4ddf | 684 | pgoff_t page_index = page_file_index(page); |
09cbfeaf | 685 | pgoff_t end_index = (i_size - 1) >> PAGE_SHIFT; |
d56b4ddf | 686 | if (page_index < end_index) |
09cbfeaf | 687 | return PAGE_SIZE; |
d56b4ddf | 688 | if (page_index == end_index) |
09cbfeaf | 689 | return ((i_size - 1) & ~PAGE_MASK) + 1; |
49a70f27 TM |
690 | } |
691 | return 0; | |
692 | } | |
8d5658c9 | 693 | |
0b26a0bf TM |
694 | /* |
695 | * Convert a umode to a dirent->d_type | |
696 | */ | |
697 | static inline | |
698 | unsigned char nfs_umode_to_dtype(umode_t mode) | |
699 | { | |
700 | return (mode >> 12) & 15; | |
701 | } | |
702 | ||
8d5658c9 TM |
703 | /* |
704 | * Determine the number of pages in an array of length 'len' and | |
705 | * with a base offset of 'base' | |
706 | */ | |
707 | static inline | |
708 | unsigned int nfs_page_array_len(unsigned int base, size_t len) | |
709 | { | |
710 | return ((unsigned long)len + (unsigned long)base + | |
711 | PAGE_SIZE - 1) >> PAGE_SHIFT; | |
712 | } | |
0110ee15 | 713 | |
3a1556e8 TM |
714 | /* |
715 | * Convert a struct timespec into a 64-bit change attribute | |
716 | * | |
717 | * This does approximately the same thing as timespec_to_ns(), | |
718 | * but for calculation efficiency, we multiply the seconds by | |
719 | * 1024*1024*1024. | |
720 | */ | |
721 | static inline | |
722 | u64 nfs_timespec_to_change_attr(const struct timespec *ts) | |
723 | { | |
724 | return ((u64)ts->tv_sec << 30) + ts->tv_nsec; | |
725 | } | |
1264a2f0 TM |
726 | |
727 | #ifdef CONFIG_CRC32 | |
728 | /** | |
729 | * nfs_fhandle_hash - calculate the crc32 hash for the filehandle | |
730 | * @fh - pointer to filehandle | |
731 | * | |
732 | * returns a crc32 hash for the filehandle that is compatible with | |
733 | * the one displayed by "wireshark". | |
734 | */ | |
735 | static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh) | |
736 | { | |
737 | return ~crc32_le(0xFFFFFFFF, &fh->data[0], fh->size); | |
738 | } | |
48c9579a OK |
739 | static inline u32 nfs_stateid_hash(const nfs4_stateid *stateid) |
740 | { | |
741 | return ~crc32_le(0xFFFFFFFF, &stateid->other[0], | |
742 | NFS4_STATEID_OTHER_SIZE); | |
743 | } | |
1264a2f0 TM |
744 | #else |
745 | static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh) | |
746 | { | |
747 | return 0; | |
748 | } | |
48c9579a OK |
749 | static inline u32 nfs_stateid_hash(nfs4_stateid *stateid) |
750 | { | |
751 | return 0; | |
752 | } | |
1264a2f0 | 753 | #endif |
0bcbf039 PT |
754 | |
755 | static inline bool nfs_error_is_fatal(int err) | |
756 | { | |
757 | switch (err) { | |
758 | case -ERESTARTSYS: | |
759 | case -EIO: | |
760 | case -ENOSPC: | |
761 | case -EROFS: | |
762 | case -E2BIG: | |
763 | return true; | |
764 | default: | |
765 | return false; | |
766 | } | |
767 | } |