1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * NFS internal definitions 4 */ 5 6 #include "nfs4_fs.h" 7 #include <linux/fs_context.h> 8 #include <linux/security.h> 9 #include <linux/crc32.h> 10 #include <linux/sunrpc/addr.h> 11 #include <linux/nfs_page.h> 12 #include <linux/wait_bit.h> 13 14 #define NFS_SB_MASK (SB_RDONLY|SB_NOSUID|SB_NODEV|SB_NOEXEC|SB_SYNCHRONOUS) 15 16 extern const struct export_operations nfs_export_ops; 17 18 struct nfs_string; 19 struct nfs_pageio_descriptor; 20 21 static inline void nfs_attr_check_mountpoint(struct super_block *parent, struct nfs_fattr *fattr) 22 { 23 if (!nfs_fsid_equal(&NFS_SB(parent)->fsid, &fattr->fsid)) 24 fattr->valid |= NFS_ATTR_FATTR_MOUNTPOINT; 25 } 26 27 static inline int nfs_attr_use_mounted_on_fileid(struct nfs_fattr *fattr) 28 { 29 if (((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) == 0) || 30 (((fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT) == 0) && 31 ((fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) == 0))) 32 return 0; 33 return 1; 34 } 35 36 static inline bool nfs_lookup_is_soft_revalidate(const struct dentry *dentry) 37 { 38 if (!(NFS_SB(dentry->d_sb)->flags & NFS_MOUNT_SOFTREVAL)) 39 return false; 40 if (!d_is_positive(dentry) || !NFS_FH(d_inode(dentry))->size) 41 return false; 42 return true; 43 } 44 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 51 /* 52 * Value used if the user did not specify a port value. 53 */ 54 #define NFS_UNSPEC_PORT (-1) 55 56 #define NFS_UNSPEC_RETRANS (UINT_MAX) 57 #define NFS_UNSPEC_TIMEO (UINT_MAX) 58 59 struct nfs_client_initdata { 60 unsigned long init_flags; 61 const char *hostname; /* Hostname of the server */ 62 const struct sockaddr *addr; /* Address of the server */ 63 const char *nodename; /* Hostname of the client */ 64 const char *ip_addr; /* IP address of the client */ 65 size_t addrlen; 66 struct nfs_subversion *nfs_mod; 67 int proto; 68 u32 minorversion; 69 unsigned int nconnect; 70 struct net *net; 71 const struct rpc_timeout *timeparms; 72 const struct cred *cred; 73 }; 74 75 /* 76 * In-kernel mount arguments 77 */ 78 struct nfs_fs_context { 79 bool internal; 80 bool skip_reconfig_option_check; 81 bool need_mount; 82 bool sloppy; 83 unsigned int flags; /* NFS{,4}_MOUNT_* flags */ 84 unsigned int rsize, wsize; 85 unsigned int timeo, retrans; 86 unsigned int acregmin, acregmax; 87 unsigned int acdirmin, acdirmax; 88 unsigned int namlen; 89 unsigned int options; 90 unsigned int bsize; 91 struct nfs_auth_info auth_info; 92 rpc_authflavor_t selected_flavor; 93 char *client_address; 94 unsigned int version; 95 unsigned int minorversion; 96 char *fscache_uniq; 97 unsigned short protofamily; 98 unsigned short mountfamily; 99 100 struct { 101 union { 102 struct sockaddr address; 103 struct sockaddr_storage _address; 104 }; 105 size_t addrlen; 106 char *hostname; 107 u32 version; 108 int port; 109 unsigned short protocol; 110 } mount_server; 111 112 struct { 113 union { 114 struct sockaddr address; 115 struct sockaddr_storage _address; 116 }; 117 size_t addrlen; 118 char *hostname; 119 char *export_path; 120 int port; 121 unsigned short protocol; 122 unsigned short nconnect; 123 unsigned short export_path_len; 124 } nfs_server; 125 126 struct nfs_fh *mntfh; 127 struct nfs_server *server; 128 struct nfs_subversion *nfs_mod; 129 130 /* Information for a cloned mount. */ 131 struct nfs_clone_mount { 132 struct super_block *sb; 133 struct dentry *dentry; 134 struct nfs_fattr *fattr; 135 unsigned int inherited_bsize; 136 } clone_data; 137 }; 138 139 #define nfs_errorf(fc, fmt, ...) ((fc)->log.log ? \ 140 errorf(fc, fmt, ## __VA_ARGS__) : \ 141 ({ dprintk(fmt "\n", ## __VA_ARGS__); })) 142 143 #define nfs_ferrorf(fc, fac, fmt, ...) ((fc)->log.log ? \ 144 errorf(fc, fmt, ## __VA_ARGS__) : \ 145 ({ dfprintk(fac, fmt "\n", ## __VA_ARGS__); })) 146 147 #define nfs_invalf(fc, fmt, ...) ((fc)->log.log ? \ 148 invalf(fc, fmt, ## __VA_ARGS__) : \ 149 ({ dprintk(fmt "\n", ## __VA_ARGS__); -EINVAL; })) 150 151 #define nfs_finvalf(fc, fac, fmt, ...) ((fc)->log.log ? \ 152 invalf(fc, fmt, ## __VA_ARGS__) : \ 153 ({ dfprintk(fac, fmt "\n", ## __VA_ARGS__); -EINVAL; })) 154 155 #define nfs_warnf(fc, fmt, ...) ((fc)->log.log ? \ 156 warnf(fc, fmt, ## __VA_ARGS__) : \ 157 ({ dprintk(fmt "\n", ## __VA_ARGS__); })) 158 159 #define nfs_fwarnf(fc, fac, fmt, ...) ((fc)->log.log ? \ 160 warnf(fc, fmt, ## __VA_ARGS__) : \ 161 ({ dfprintk(fac, fmt "\n", ## __VA_ARGS__); })) 162 163 static inline struct nfs_fs_context *nfs_fc2context(const struct fs_context *fc) 164 { 165 return fc->fs_private; 166 } 167 168 /* mount_clnt.c */ 169 struct nfs_mount_request { 170 struct sockaddr *sap; 171 size_t salen; 172 char *hostname; 173 char *dirpath; 174 u32 version; 175 unsigned short protocol; 176 struct nfs_fh *fh; 177 int noresvport; 178 unsigned int *auth_flav_len; 179 rpc_authflavor_t *auth_flavs; 180 struct net *net; 181 }; 182 183 extern int nfs_mount(struct nfs_mount_request *info); 184 extern void nfs_umount(const struct nfs_mount_request *info); 185 186 /* client.c */ 187 extern const struct rpc_program nfs_program; 188 extern void nfs_clients_init(struct net *net); 189 extern void nfs_clients_exit(struct net *net); 190 extern struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *); 191 int nfs_create_rpc_client(struct nfs_client *, const struct nfs_client_initdata *, rpc_authflavor_t); 192 struct nfs_client *nfs_get_client(const struct nfs_client_initdata *); 193 int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *, struct nfs_fattr *); 194 void nfs_server_insert_lists(struct nfs_server *); 195 void nfs_server_remove_lists(struct nfs_server *); 196 void nfs_init_timeout_values(struct rpc_timeout *to, int proto, int timeo, int retrans); 197 int nfs_init_server_rpcclient(struct nfs_server *, const struct rpc_timeout *t, 198 rpc_authflavor_t); 199 struct nfs_server *nfs_alloc_server(void); 200 void nfs_server_copy_userdata(struct nfs_server *, struct nfs_server *); 201 202 extern void nfs_put_client(struct nfs_client *); 203 extern void nfs_free_client(struct nfs_client *); 204 extern struct nfs_client *nfs4_find_client_ident(struct net *, int); 205 extern struct nfs_client * 206 nfs4_find_client_sessionid(struct net *, const struct sockaddr *, 207 struct nfs4_sessionid *, u32); 208 extern struct nfs_server *nfs_create_server(struct fs_context *); 209 extern struct nfs_server *nfs4_create_server(struct fs_context *); 210 extern struct nfs_server *nfs4_create_referral_server(struct fs_context *); 211 extern int nfs4_update_server(struct nfs_server *server, const char *hostname, 212 struct sockaddr *sap, size_t salen, 213 struct net *net); 214 extern void nfs_free_server(struct nfs_server *server); 215 extern struct nfs_server *nfs_clone_server(struct nfs_server *, 216 struct nfs_fh *, 217 struct nfs_fattr *, 218 rpc_authflavor_t); 219 extern bool nfs_client_init_is_complete(const struct nfs_client *clp); 220 extern int nfs_client_init_status(const struct nfs_client *clp); 221 extern int nfs_wait_client_init_complete(const struct nfs_client *clp); 222 extern void nfs_mark_client_ready(struct nfs_client *clp, int state); 223 extern struct nfs_client *nfs4_set_ds_client(struct nfs_server *mds_srv, 224 const struct sockaddr *ds_addr, 225 int ds_addrlen, int ds_proto, 226 unsigned int ds_timeo, 227 unsigned int ds_retrans, 228 u32 minor_version); 229 extern struct rpc_clnt *nfs4_find_or_create_ds_client(struct nfs_client *, 230 struct inode *); 231 extern struct nfs_client *nfs3_set_ds_client(struct nfs_server *mds_srv, 232 const struct sockaddr *ds_addr, int ds_addrlen, 233 int ds_proto, unsigned int ds_timeo, 234 unsigned int ds_retrans); 235 #ifdef CONFIG_PROC_FS 236 extern int __init nfs_fs_proc_init(void); 237 extern void nfs_fs_proc_exit(void); 238 extern int nfs_fs_proc_net_init(struct net *net); 239 extern void nfs_fs_proc_net_exit(struct net *net); 240 #else 241 static inline int nfs_fs_proc_net_init(struct net *net) 242 { 243 return 0; 244 } 245 static inline void nfs_fs_proc_net_exit(struct net *net) 246 { 247 } 248 static inline int nfs_fs_proc_init(void) 249 { 250 return 0; 251 } 252 static inline void nfs_fs_proc_exit(void) 253 { 254 } 255 #endif 256 257 /* callback_xdr.c */ 258 extern const struct svc_version nfs4_callback_version1; 259 extern const struct svc_version nfs4_callback_version4; 260 261 /* fs_context.c */ 262 extern struct file_system_type nfs_fs_type; 263 264 /* pagelist.c */ 265 extern int __init nfs_init_nfspagecache(void); 266 extern void nfs_destroy_nfspagecache(void); 267 extern int __init nfs_init_readpagecache(void); 268 extern void nfs_destroy_readpagecache(void); 269 extern int __init nfs_init_writepagecache(void); 270 extern void nfs_destroy_writepagecache(void); 271 272 extern int __init nfs_init_directcache(void); 273 extern void nfs_destroy_directcache(void); 274 extern void nfs_pgheader_init(struct nfs_pageio_descriptor *desc, 275 struct nfs_pgio_header *hdr, 276 void (*release)(struct nfs_pgio_header *hdr)); 277 void nfs_set_pgio_error(struct nfs_pgio_header *hdr, int error, loff_t pos); 278 int nfs_iocounter_wait(struct nfs_lock_context *l_ctx); 279 280 extern const struct nfs_pageio_ops nfs_pgio_rw_ops; 281 struct nfs_pgio_header *nfs_pgio_header_alloc(const struct nfs_rw_ops *); 282 void nfs_pgio_header_free(struct nfs_pgio_header *); 283 int nfs_generic_pgio(struct nfs_pageio_descriptor *, struct nfs_pgio_header *); 284 int nfs_initiate_pgio(struct rpc_clnt *clnt, struct nfs_pgio_header *hdr, 285 const struct cred *cred, const struct nfs_rpc_ops *rpc_ops, 286 const struct rpc_call_ops *call_ops, int how, int flags); 287 void nfs_free_request(struct nfs_page *req); 288 struct nfs_pgio_mirror * 289 nfs_pgio_current_mirror(struct nfs_pageio_descriptor *desc); 290 291 static inline bool nfs_match_open_context(const struct nfs_open_context *ctx1, 292 const struct nfs_open_context *ctx2) 293 { 294 return cred_fscmp(ctx1->cred, ctx2->cred) == 0 && ctx1->state == ctx2->state; 295 } 296 297 /* nfs2xdr.c */ 298 extern const struct rpc_procinfo nfs_procedures[]; 299 extern int nfs2_decode_dirent(struct xdr_stream *, 300 struct nfs_entry *, bool); 301 302 /* nfs3xdr.c */ 303 extern const struct rpc_procinfo nfs3_procedures[]; 304 extern int nfs3_decode_dirent(struct xdr_stream *, 305 struct nfs_entry *, bool); 306 307 /* nfs4xdr.c */ 308 #if IS_ENABLED(CONFIG_NFS_V4) 309 extern int nfs4_decode_dirent(struct xdr_stream *, 310 struct nfs_entry *, bool); 311 #endif 312 #ifdef CONFIG_NFS_V4_1 313 extern const u32 nfs41_maxread_overhead; 314 extern const u32 nfs41_maxwrite_overhead; 315 extern const u32 nfs41_maxgetdevinfo_overhead; 316 #endif 317 318 /* nfs4proc.c */ 319 #if IS_ENABLED(CONFIG_NFS_V4) 320 extern const struct rpc_procinfo nfs4_procedures[]; 321 #endif 322 323 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 324 extern struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags); 325 static inline struct nfs4_label * 326 nfs4_label_copy(struct nfs4_label *dst, struct nfs4_label *src) 327 { 328 if (!dst || !src) 329 return NULL; 330 331 if (src->len > NFS4_MAXLABELLEN) 332 return NULL; 333 334 dst->lfs = src->lfs; 335 dst->pi = src->pi; 336 dst->len = src->len; 337 memcpy(dst->label, src->label, src->len); 338 339 return dst; 340 } 341 static inline void nfs4_label_free(struct nfs4_label *label) 342 { 343 if (label) { 344 kfree(label->label); 345 kfree(label); 346 } 347 return; 348 } 349 350 static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi) 351 { 352 if (nfs_server_capable(&nfsi->vfs_inode, NFS_CAP_SECURITY_LABEL)) 353 nfsi->cache_validity |= NFS_INO_INVALID_LABEL; 354 } 355 #else 356 static inline struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags) { return NULL; } 357 static inline void nfs4_label_free(void *label) {} 358 static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi) 359 { 360 } 361 static inline struct nfs4_label * 362 nfs4_label_copy(struct nfs4_label *dst, struct nfs4_label *src) 363 { 364 return NULL; 365 } 366 #endif /* CONFIG_NFS_V4_SECURITY_LABEL */ 367 368 /* proc.c */ 369 void nfs_close_context(struct nfs_open_context *ctx, int is_sync); 370 extern struct nfs_client *nfs_init_client(struct nfs_client *clp, 371 const struct nfs_client_initdata *); 372 373 /* dir.c */ 374 extern void nfs_advise_use_readdirplus(struct inode *dir); 375 extern void nfs_force_use_readdirplus(struct inode *dir); 376 extern unsigned long nfs_access_cache_count(struct shrinker *shrink, 377 struct shrink_control *sc); 378 extern unsigned long nfs_access_cache_scan(struct shrinker *shrink, 379 struct shrink_control *sc); 380 struct dentry *nfs_lookup(struct inode *, struct dentry *, unsigned int); 381 int nfs_create(struct inode *, struct dentry *, umode_t, bool); 382 int nfs_mkdir(struct inode *, struct dentry *, umode_t); 383 int nfs_rmdir(struct inode *, struct dentry *); 384 int nfs_unlink(struct inode *, struct dentry *); 385 int nfs_symlink(struct inode *, struct dentry *, const char *); 386 int nfs_link(struct dentry *, struct inode *, struct dentry *); 387 int nfs_mknod(struct inode *, struct dentry *, umode_t, dev_t); 388 int nfs_rename(struct inode *, struct dentry *, 389 struct inode *, struct dentry *, unsigned int); 390 391 /* file.c */ 392 int nfs_file_fsync(struct file *file, loff_t start, loff_t end, int datasync); 393 loff_t nfs_file_llseek(struct file *, loff_t, int); 394 ssize_t nfs_file_read(struct kiocb *, struct iov_iter *); 395 int nfs_file_mmap(struct file *, struct vm_area_struct *); 396 ssize_t nfs_file_write(struct kiocb *, struct iov_iter *); 397 int nfs_file_release(struct inode *, struct file *); 398 int nfs_lock(struct file *, int, struct file_lock *); 399 int nfs_flock(struct file *, int, struct file_lock *); 400 int nfs_check_flags(int); 401 402 /* inode.c */ 403 extern struct workqueue_struct *nfsiod_workqueue; 404 extern struct inode *nfs_alloc_inode(struct super_block *sb); 405 extern void nfs_free_inode(struct inode *); 406 extern int nfs_write_inode(struct inode *, struct writeback_control *); 407 extern int nfs_drop_inode(struct inode *); 408 extern void nfs_clear_inode(struct inode *); 409 extern void nfs_evict_inode(struct inode *); 410 void nfs_zap_acl_cache(struct inode *inode); 411 extern bool nfs_check_cache_invalid(struct inode *, unsigned long); 412 extern int nfs_wait_bit_killable(struct wait_bit_key *key, int mode); 413 extern int nfs_wait_atomic_killable(atomic_t *p, unsigned int mode); 414 415 /* super.c */ 416 extern const struct super_operations nfs_sops; 417 bool nfs_auth_info_match(const struct nfs_auth_info *, rpc_authflavor_t); 418 int nfs_try_get_tree(struct fs_context *); 419 int nfs_get_tree_common(struct fs_context *); 420 void nfs_kill_super(struct super_block *); 421 422 extern struct rpc_stat nfs_rpcstat; 423 424 extern int __init register_nfs_fs(void); 425 extern void __exit unregister_nfs_fs(void); 426 extern bool nfs_sb_active(struct super_block *sb); 427 extern void nfs_sb_deactive(struct super_block *sb); 428 extern int nfs_client_for_each_server(struct nfs_client *clp, 429 int (*fn)(struct nfs_server *, void *), 430 void *data); 431 /* io.c */ 432 extern void nfs_start_io_read(struct inode *inode); 433 extern void nfs_end_io_read(struct inode *inode); 434 extern void nfs_start_io_write(struct inode *inode); 435 extern void nfs_end_io_write(struct inode *inode); 436 extern void nfs_start_io_direct(struct inode *inode); 437 extern void nfs_end_io_direct(struct inode *inode); 438 439 static inline bool nfs_file_io_is_buffered(struct nfs_inode *nfsi) 440 { 441 return test_bit(NFS_INO_ODIRECT, &nfsi->flags) == 0; 442 } 443 444 /* namespace.c */ 445 #define NFS_PATH_CANONICAL 1 446 extern char *nfs_path(char **p, struct dentry *dentry, 447 char *buffer, ssize_t buflen, unsigned flags); 448 extern struct vfsmount *nfs_d_automount(struct path *path); 449 int nfs_submount(struct fs_context *, struct nfs_server *); 450 int nfs_do_submount(struct fs_context *); 451 452 /* getroot.c */ 453 extern int nfs_get_root(struct super_block *s, struct fs_context *fc); 454 #if IS_ENABLED(CONFIG_NFS_V4) 455 extern int nfs4_get_rootfh(struct nfs_server *server, struct nfs_fh *mntfh, bool); 456 #endif 457 458 struct nfs_pgio_completion_ops; 459 /* read.c */ 460 extern void nfs_pageio_init_read(struct nfs_pageio_descriptor *pgio, 461 struct inode *inode, bool force_mds, 462 const struct nfs_pgio_completion_ops *compl_ops); 463 extern void nfs_read_prepare(struct rpc_task *task, void *calldata); 464 extern void nfs_pageio_reset_read_mds(struct nfs_pageio_descriptor *pgio); 465 466 /* super.c */ 467 void nfs_umount_begin(struct super_block *); 468 int nfs_statfs(struct dentry *, struct kstatfs *); 469 int nfs_show_options(struct seq_file *, struct dentry *); 470 int nfs_show_devname(struct seq_file *, struct dentry *); 471 int nfs_show_path(struct seq_file *, struct dentry *); 472 int nfs_show_stats(struct seq_file *, struct dentry *); 473 int nfs_reconfigure(struct fs_context *); 474 475 /* write.c */ 476 extern void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio, 477 struct inode *inode, int ioflags, bool force_mds, 478 const struct nfs_pgio_completion_ops *compl_ops); 479 extern void nfs_pageio_reset_write_mds(struct nfs_pageio_descriptor *pgio); 480 extern void nfs_commit_free(struct nfs_commit_data *p); 481 extern void nfs_write_prepare(struct rpc_task *task, void *calldata); 482 extern void nfs_commit_prepare(struct rpc_task *task, void *calldata); 483 extern int nfs_initiate_commit(struct rpc_clnt *clnt, 484 struct nfs_commit_data *data, 485 const struct nfs_rpc_ops *nfs_ops, 486 const struct rpc_call_ops *call_ops, 487 int how, int flags); 488 extern void nfs_init_commit(struct nfs_commit_data *data, 489 struct list_head *head, 490 struct pnfs_layout_segment *lseg, 491 struct nfs_commit_info *cinfo); 492 int nfs_scan_commit_list(struct list_head *src, struct list_head *dst, 493 struct nfs_commit_info *cinfo, int max); 494 unsigned long nfs_reqs_to_commit(struct nfs_commit_info *); 495 int nfs_scan_commit(struct inode *inode, struct list_head *dst, 496 struct nfs_commit_info *cinfo); 497 void nfs_mark_request_commit(struct nfs_page *req, 498 struct pnfs_layout_segment *lseg, 499 struct nfs_commit_info *cinfo, 500 u32 ds_commit_idx); 501 int nfs_write_need_commit(struct nfs_pgio_header *); 502 void nfs_writeback_update_inode(struct nfs_pgio_header *hdr); 503 int nfs_generic_commit_list(struct inode *inode, struct list_head *head, 504 int how, struct nfs_commit_info *cinfo); 505 void nfs_retry_commit(struct list_head *page_list, 506 struct pnfs_layout_segment *lseg, 507 struct nfs_commit_info *cinfo, 508 u32 ds_commit_idx); 509 void nfs_commitdata_release(struct nfs_commit_data *data); 510 void nfs_request_add_commit_list(struct nfs_page *req, 511 struct nfs_commit_info *cinfo); 512 void nfs_request_add_commit_list_locked(struct nfs_page *req, 513 struct list_head *dst, 514 struct nfs_commit_info *cinfo); 515 void nfs_request_remove_commit_list(struct nfs_page *req, 516 struct nfs_commit_info *cinfo); 517 void nfs_init_cinfo(struct nfs_commit_info *cinfo, 518 struct inode *inode, 519 struct nfs_direct_req *dreq); 520 int nfs_key_timeout_notify(struct file *filp, struct inode *inode); 521 bool nfs_ctx_key_to_expire(struct nfs_open_context *ctx, struct inode *inode); 522 void nfs_pageio_stop_mirroring(struct nfs_pageio_descriptor *pgio); 523 524 int nfs_filemap_write_and_wait_range(struct address_space *mapping, 525 loff_t lstart, loff_t lend); 526 527 #ifdef CONFIG_NFS_V4_1 528 static inline void 529 pnfs_bucket_clear_pnfs_ds_commit_verifiers(struct pnfs_commit_bucket *buckets, 530 unsigned int nbuckets) 531 { 532 unsigned int i; 533 534 for (i = 0; i < nbuckets; i++) 535 buckets[i].direct_verf.committed = NFS_INVALID_STABLE_HOW; 536 } 537 static inline 538 void nfs_clear_pnfs_ds_commit_verifiers(struct pnfs_ds_commit_info *cinfo) 539 { 540 struct pnfs_commit_array *array; 541 542 rcu_read_lock(); 543 list_for_each_entry_rcu(array, &cinfo->commits, cinfo_list) 544 pnfs_bucket_clear_pnfs_ds_commit_verifiers(array->buckets, 545 array->nbuckets); 546 rcu_read_unlock(); 547 } 548 #else 549 static inline 550 void nfs_clear_pnfs_ds_commit_verifiers(struct pnfs_ds_commit_info *cinfo) 551 { 552 } 553 #endif 554 555 #ifdef CONFIG_MIGRATION 556 extern int nfs_migrate_page(struct address_space *, 557 struct page *, struct page *, enum migrate_mode); 558 #endif 559 560 static inline int 561 nfs_write_verifier_cmp(const struct nfs_write_verifier *v1, 562 const struct nfs_write_verifier *v2) 563 { 564 return memcmp(v1->data, v2->data, sizeof(v1->data)); 565 } 566 567 static inline bool 568 nfs_write_match_verf(const struct nfs_writeverf *verf, 569 struct nfs_page *req) 570 { 571 return verf->committed > NFS_UNSTABLE && 572 !nfs_write_verifier_cmp(&req->wb_verf, &verf->verifier); 573 } 574 575 /* unlink.c */ 576 extern struct rpc_task * 577 nfs_async_rename(struct inode *old_dir, struct inode *new_dir, 578 struct dentry *old_dentry, struct dentry *new_dentry, 579 void (*complete)(struct rpc_task *, struct nfs_renamedata *)); 580 extern int nfs_sillyrename(struct inode *dir, struct dentry *dentry); 581 582 /* direct.c */ 583 void nfs_init_cinfo_from_dreq(struct nfs_commit_info *cinfo, 584 struct nfs_direct_req *dreq); 585 extern ssize_t nfs_dreq_bytes_left(struct nfs_direct_req *dreq); 586 587 /* nfs4proc.c */ 588 extern struct nfs_client *nfs4_init_client(struct nfs_client *clp, 589 const struct nfs_client_initdata *); 590 extern int nfs40_walk_client_list(struct nfs_client *clp, 591 struct nfs_client **result, 592 const struct cred *cred); 593 extern int nfs41_walk_client_list(struct nfs_client *clp, 594 struct nfs_client **result, 595 const struct cred *cred); 596 extern void nfs4_test_session_trunk(struct rpc_clnt *clnt, 597 struct rpc_xprt *xprt, 598 void *data); 599 600 static inline struct inode *nfs_igrab_and_active(struct inode *inode) 601 { 602 struct super_block *sb = inode->i_sb; 603 604 if (sb && nfs_sb_active(sb)) { 605 if (igrab(inode)) 606 return inode; 607 nfs_sb_deactive(sb); 608 } 609 return NULL; 610 } 611 612 static inline void nfs_iput_and_deactive(struct inode *inode) 613 { 614 if (inode != NULL) { 615 struct super_block *sb = inode->i_sb; 616 617 iput(inode); 618 nfs_sb_deactive(sb); 619 } 620 } 621 622 /* 623 * Determine the device name as a string 624 */ 625 static inline char *nfs_devname(struct dentry *dentry, 626 char *buffer, ssize_t buflen) 627 { 628 char *dummy; 629 return nfs_path(&dummy, dentry, buffer, buflen, NFS_PATH_CANONICAL); 630 } 631 632 /* 633 * Determine the actual block size (and log2 thereof) 634 */ 635 static inline 636 unsigned long nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp) 637 { 638 /* make sure blocksize is a power of two */ 639 if ((bsize & (bsize - 1)) || nrbitsp) { 640 unsigned char nrbits; 641 642 for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--) 643 ; 644 bsize = 1 << nrbits; 645 if (nrbitsp) 646 *nrbitsp = nrbits; 647 } 648 649 return bsize; 650 } 651 652 /* 653 * Calculate the number of 512byte blocks used. 654 */ 655 static inline blkcnt_t nfs_calc_block_size(u64 tsize) 656 { 657 blkcnt_t used = (tsize + 511) >> 9; 658 return (used > ULONG_MAX) ? ULONG_MAX : used; 659 } 660 661 /* 662 * Compute and set NFS server blocksize 663 */ 664 static inline 665 unsigned long nfs_block_size(unsigned long bsize, unsigned char *nrbitsp) 666 { 667 if (bsize < NFS_MIN_FILE_IO_SIZE) 668 bsize = NFS_DEF_FILE_IO_SIZE; 669 else if (bsize >= NFS_MAX_FILE_IO_SIZE) 670 bsize = NFS_MAX_FILE_IO_SIZE; 671 672 return nfs_block_bits(bsize, nrbitsp); 673 } 674 675 /* 676 * Determine the maximum file size for a superblock 677 */ 678 static inline 679 void nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize) 680 { 681 sb->s_maxbytes = (loff_t)maxfilesize; 682 if (sb->s_maxbytes > MAX_LFS_FILESIZE || sb->s_maxbytes <= 0) 683 sb->s_maxbytes = MAX_LFS_FILESIZE; 684 } 685 686 /* 687 * Record the page as unstable (an extra writeback period) and mark its 688 * inode as dirty. 689 */ 690 static inline 691 void nfs_mark_page_unstable(struct page *page, struct nfs_commit_info *cinfo) 692 { 693 if (!cinfo->dreq) { 694 struct inode *inode = page_file_mapping(page)->host; 695 696 /* This page is really still in write-back - just that the 697 * writeback is happening on the server now. 698 */ 699 inc_node_page_state(page, NR_WRITEBACK); 700 inc_wb_stat(&inode_to_bdi(inode)->wb, WB_WRITEBACK); 701 __mark_inode_dirty(inode, I_DIRTY_DATASYNC); 702 } 703 } 704 705 /* 706 * Determine the number of bytes of data the page contains 707 */ 708 static inline 709 unsigned int nfs_page_length(struct page *page) 710 { 711 loff_t i_size = i_size_read(page_file_mapping(page)->host); 712 713 if (i_size > 0) { 714 pgoff_t index = page_index(page); 715 pgoff_t end_index = (i_size - 1) >> PAGE_SHIFT; 716 if (index < end_index) 717 return PAGE_SIZE; 718 if (index == end_index) 719 return ((i_size - 1) & ~PAGE_MASK) + 1; 720 } 721 return 0; 722 } 723 724 /* 725 * Convert a umode to a dirent->d_type 726 */ 727 static inline 728 unsigned char nfs_umode_to_dtype(umode_t mode) 729 { 730 return (mode >> 12) & 15; 731 } 732 733 /* 734 * Determine the number of pages in an array of length 'len' and 735 * with a base offset of 'base' 736 */ 737 static inline 738 unsigned int nfs_page_array_len(unsigned int base, size_t len) 739 { 740 return ((unsigned long)len + (unsigned long)base + 741 PAGE_SIZE - 1) >> PAGE_SHIFT; 742 } 743 744 /* 745 * Convert a struct timespec64 into a 64-bit change attribute 746 * 747 * This does approximately the same thing as timespec64_to_ns(), 748 * but for calculation efficiency, we multiply the seconds by 749 * 1024*1024*1024. 750 */ 751 static inline 752 u64 nfs_timespec_to_change_attr(const struct timespec64 *ts) 753 { 754 return ((u64)ts->tv_sec << 30) + ts->tv_nsec; 755 } 756 757 #ifdef CONFIG_CRC32 758 /** 759 * nfs_fhandle_hash - calculate the crc32 hash for the filehandle 760 * @fh - pointer to filehandle 761 * 762 * returns a crc32 hash for the filehandle that is compatible with 763 * the one displayed by "wireshark". 764 */ 765 static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh) 766 { 767 return ~crc32_le(0xFFFFFFFF, &fh->data[0], fh->size); 768 } 769 static inline u32 nfs_stateid_hash(const nfs4_stateid *stateid) 770 { 771 return ~crc32_le(0xFFFFFFFF, &stateid->other[0], 772 NFS4_STATEID_OTHER_SIZE); 773 } 774 #else 775 static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh) 776 { 777 return 0; 778 } 779 static inline u32 nfs_stateid_hash(nfs4_stateid *stateid) 780 { 781 return 0; 782 } 783 #endif 784 785 static inline bool nfs_error_is_fatal(int err) 786 { 787 switch (err) { 788 case -ERESTARTSYS: 789 case -EINTR: 790 case -EACCES: 791 case -EDQUOT: 792 case -EFBIG: 793 case -EIO: 794 case -ENOSPC: 795 case -EROFS: 796 case -ESTALE: 797 case -E2BIG: 798 case -ENOMEM: 799 case -ETIMEDOUT: 800 return true; 801 default: 802 return false; 803 } 804 } 805 806 static inline bool nfs_error_is_fatal_on_server(int err) 807 { 808 switch (err) { 809 case 0: 810 case -ERESTARTSYS: 811 case -EINTR: 812 return false; 813 } 814 return nfs_error_is_fatal(err); 815 } 816 817 /* 818 * Select between a default port value and a user-specified port value. 819 * If a zero value is set, then autobind will be used. 820 */ 821 static inline void nfs_set_port(struct sockaddr *sap, int *port, 822 const unsigned short default_port) 823 { 824 if (*port == NFS_UNSPEC_PORT) 825 *port = default_port; 826 827 rpc_set_port(sap, *port); 828 } 829