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 unsigned int max_connect; 71 struct net *net; 72 const struct rpc_timeout *timeparms; 73 const struct cred *cred; 74 }; 75 76 /* 77 * In-kernel mount arguments 78 */ 79 struct nfs_fs_context { 80 bool internal; 81 bool skip_reconfig_option_check; 82 bool need_mount; 83 bool sloppy; 84 unsigned int flags; /* NFS{,4}_MOUNT_* flags */ 85 unsigned int rsize, wsize; 86 unsigned int timeo, retrans; 87 unsigned int acregmin, acregmax; 88 unsigned int acdirmin, acdirmax; 89 unsigned int namlen; 90 unsigned int options; 91 unsigned int bsize; 92 struct nfs_auth_info auth_info; 93 rpc_authflavor_t selected_flavor; 94 char *client_address; 95 unsigned int version; 96 unsigned int minorversion; 97 char *fscache_uniq; 98 unsigned short protofamily; 99 unsigned short mountfamily; 100 bool has_sec_mnt_opts; 101 102 struct { 103 union { 104 struct sockaddr address; 105 struct sockaddr_storage _address; 106 }; 107 size_t addrlen; 108 char *hostname; 109 u32 version; 110 int port; 111 unsigned short protocol; 112 } mount_server; 113 114 struct { 115 union { 116 struct sockaddr address; 117 struct sockaddr_storage _address; 118 }; 119 size_t addrlen; 120 char *hostname; 121 char *export_path; 122 int port; 123 unsigned short protocol; 124 unsigned short nconnect; 125 unsigned short max_connect; 126 unsigned short export_path_len; 127 } nfs_server; 128 129 struct nfs_fh *mntfh; 130 struct nfs_server *server; 131 struct nfs_subversion *nfs_mod; 132 133 /* Information for a cloned mount. */ 134 struct nfs_clone_mount { 135 struct super_block *sb; 136 struct dentry *dentry; 137 struct nfs_fattr *fattr; 138 unsigned int inherited_bsize; 139 } clone_data; 140 }; 141 142 #define nfs_errorf(fc, fmt, ...) ((fc)->log.log ? \ 143 errorf(fc, fmt, ## __VA_ARGS__) : \ 144 ({ dprintk(fmt "\n", ## __VA_ARGS__); })) 145 146 #define nfs_ferrorf(fc, fac, fmt, ...) ((fc)->log.log ? \ 147 errorf(fc, fmt, ## __VA_ARGS__) : \ 148 ({ dfprintk(fac, fmt "\n", ## __VA_ARGS__); })) 149 150 #define nfs_invalf(fc, fmt, ...) ((fc)->log.log ? \ 151 invalf(fc, fmt, ## __VA_ARGS__) : \ 152 ({ dprintk(fmt "\n", ## __VA_ARGS__); -EINVAL; })) 153 154 #define nfs_finvalf(fc, fac, fmt, ...) ((fc)->log.log ? \ 155 invalf(fc, fmt, ## __VA_ARGS__) : \ 156 ({ dfprintk(fac, fmt "\n", ## __VA_ARGS__); -EINVAL; })) 157 158 #define nfs_warnf(fc, fmt, ...) ((fc)->log.log ? \ 159 warnf(fc, fmt, ## __VA_ARGS__) : \ 160 ({ dprintk(fmt "\n", ## __VA_ARGS__); })) 161 162 #define nfs_fwarnf(fc, fac, fmt, ...) ((fc)->log.log ? \ 163 warnf(fc, fmt, ## __VA_ARGS__) : \ 164 ({ dfprintk(fac, fmt "\n", ## __VA_ARGS__); })) 165 166 static inline struct nfs_fs_context *nfs_fc2context(const struct fs_context *fc) 167 { 168 return fc->fs_private; 169 } 170 171 /* mount_clnt.c */ 172 struct nfs_mount_request { 173 struct sockaddr *sap; 174 size_t salen; 175 char *hostname; 176 char *dirpath; 177 u32 version; 178 unsigned short protocol; 179 struct nfs_fh *fh; 180 int noresvport; 181 unsigned int *auth_flav_len; 182 rpc_authflavor_t *auth_flavs; 183 struct net *net; 184 }; 185 186 extern int nfs_mount(struct nfs_mount_request *info, int timeo, int retrans); 187 extern void nfs_umount(const struct nfs_mount_request *info); 188 189 /* client.c */ 190 extern const struct rpc_program nfs_program; 191 extern void nfs_clients_init(struct net *net); 192 extern void nfs_clients_exit(struct net *net); 193 extern struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *); 194 int nfs_create_rpc_client(struct nfs_client *, const struct nfs_client_initdata *, rpc_authflavor_t); 195 struct nfs_client *nfs_get_client(const struct nfs_client_initdata *); 196 int nfs_probe_server(struct nfs_server *, struct nfs_fh *); 197 void nfs_server_insert_lists(struct nfs_server *); 198 void nfs_server_remove_lists(struct nfs_server *); 199 void nfs_init_timeout_values(struct rpc_timeout *to, int proto, int timeo, int retrans); 200 int nfs_init_server_rpcclient(struct nfs_server *, const struct rpc_timeout *t, 201 rpc_authflavor_t); 202 struct nfs_server *nfs_alloc_server(void); 203 void nfs_server_copy_userdata(struct nfs_server *, struct nfs_server *); 204 205 extern void nfs_put_client(struct nfs_client *); 206 extern void nfs_free_client(struct nfs_client *); 207 extern struct nfs_client *nfs4_find_client_ident(struct net *, int); 208 extern struct nfs_client * 209 nfs4_find_client_sessionid(struct net *, const struct sockaddr *, 210 struct nfs4_sessionid *, u32); 211 extern struct nfs_server *nfs_create_server(struct fs_context *); 212 extern void nfs4_server_set_init_caps(struct nfs_server *); 213 extern struct nfs_server *nfs4_create_server(struct fs_context *); 214 extern struct nfs_server *nfs4_create_referral_server(struct fs_context *); 215 extern int nfs4_update_server(struct nfs_server *server, const char *hostname, 216 struct sockaddr *sap, size_t salen, 217 struct net *net); 218 extern void nfs_free_server(struct nfs_server *server); 219 extern struct nfs_server *nfs_clone_server(struct nfs_server *, 220 struct nfs_fh *, 221 struct nfs_fattr *, 222 rpc_authflavor_t); 223 extern bool nfs_client_init_is_complete(const struct nfs_client *clp); 224 extern int nfs_client_init_status(const struct nfs_client *clp); 225 extern int nfs_wait_client_init_complete(const struct nfs_client *clp); 226 extern void nfs_mark_client_ready(struct nfs_client *clp, int state); 227 extern struct nfs_client *nfs4_set_ds_client(struct nfs_server *mds_srv, 228 const struct sockaddr *ds_addr, 229 int ds_addrlen, int ds_proto, 230 unsigned int ds_timeo, 231 unsigned int ds_retrans, 232 u32 minor_version); 233 extern struct rpc_clnt *nfs4_find_or_create_ds_client(struct nfs_client *, 234 struct inode *); 235 extern struct nfs_client *nfs3_set_ds_client(struct nfs_server *mds_srv, 236 const struct sockaddr *ds_addr, int ds_addrlen, 237 int ds_proto, unsigned int ds_timeo, 238 unsigned int ds_retrans); 239 #ifdef CONFIG_PROC_FS 240 extern int __init nfs_fs_proc_init(void); 241 extern void nfs_fs_proc_exit(void); 242 extern int nfs_fs_proc_net_init(struct net *net); 243 extern void nfs_fs_proc_net_exit(struct net *net); 244 #else 245 static inline int nfs_fs_proc_net_init(struct net *net) 246 { 247 return 0; 248 } 249 static inline void nfs_fs_proc_net_exit(struct net *net) 250 { 251 } 252 static inline int nfs_fs_proc_init(void) 253 { 254 return 0; 255 } 256 static inline void nfs_fs_proc_exit(void) 257 { 258 } 259 #endif 260 261 /* callback_xdr.c */ 262 extern const struct svc_version nfs4_callback_version1; 263 extern const struct svc_version nfs4_callback_version4; 264 265 /* fs_context.c */ 266 extern struct file_system_type nfs_fs_type; 267 268 /* pagelist.c */ 269 extern int __init nfs_init_nfspagecache(void); 270 extern void nfs_destroy_nfspagecache(void); 271 extern int __init nfs_init_readpagecache(void); 272 extern void nfs_destroy_readpagecache(void); 273 extern int __init nfs_init_writepagecache(void); 274 extern void nfs_destroy_writepagecache(void); 275 276 extern int __init nfs_init_directcache(void); 277 extern void nfs_destroy_directcache(void); 278 extern void nfs_pgheader_init(struct nfs_pageio_descriptor *desc, 279 struct nfs_pgio_header *hdr, 280 void (*release)(struct nfs_pgio_header *hdr)); 281 void nfs_set_pgio_error(struct nfs_pgio_header *hdr, int error, loff_t pos); 282 int nfs_iocounter_wait(struct nfs_lock_context *l_ctx); 283 284 extern const struct nfs_pageio_ops nfs_pgio_rw_ops; 285 struct nfs_pgio_header *nfs_pgio_header_alloc(const struct nfs_rw_ops *); 286 void nfs_pgio_header_free(struct nfs_pgio_header *); 287 int nfs_generic_pgio(struct nfs_pageio_descriptor *, struct nfs_pgio_header *); 288 int nfs_initiate_pgio(struct rpc_clnt *clnt, struct nfs_pgio_header *hdr, 289 const struct cred *cred, const struct nfs_rpc_ops *rpc_ops, 290 const struct rpc_call_ops *call_ops, int how, int flags); 291 void nfs_free_request(struct nfs_page *req); 292 struct nfs_pgio_mirror * 293 nfs_pgio_current_mirror(struct nfs_pageio_descriptor *desc); 294 295 static inline bool nfs_match_open_context(const struct nfs_open_context *ctx1, 296 const struct nfs_open_context *ctx2) 297 { 298 return cred_fscmp(ctx1->cred, ctx2->cred) == 0 && ctx1->state == ctx2->state; 299 } 300 301 /* nfs2xdr.c */ 302 extern const struct rpc_procinfo nfs_procedures[]; 303 extern int nfs2_decode_dirent(struct xdr_stream *, 304 struct nfs_entry *, bool); 305 306 /* nfs3xdr.c */ 307 extern const struct rpc_procinfo nfs3_procedures[]; 308 extern int nfs3_decode_dirent(struct xdr_stream *, 309 struct nfs_entry *, bool); 310 311 /* nfs4xdr.c */ 312 #if IS_ENABLED(CONFIG_NFS_V4) 313 extern int nfs4_decode_dirent(struct xdr_stream *, 314 struct nfs_entry *, bool); 315 #endif 316 #ifdef CONFIG_NFS_V4_1 317 extern const u32 nfs41_maxread_overhead; 318 extern const u32 nfs41_maxwrite_overhead; 319 extern const u32 nfs41_maxgetdevinfo_overhead; 320 #endif 321 322 /* nfs4proc.c */ 323 #if IS_ENABLED(CONFIG_NFS_V4) 324 extern const struct rpc_procinfo nfs4_procedures[]; 325 #endif 326 327 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 328 extern struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags); 329 static inline struct nfs4_label * 330 nfs4_label_copy(struct nfs4_label *dst, struct nfs4_label *src) 331 { 332 if (!dst || !src) 333 return NULL; 334 335 if (src->len > NFS4_MAXLABELLEN) 336 return NULL; 337 338 dst->lfs = src->lfs; 339 dst->pi = src->pi; 340 dst->len = src->len; 341 memcpy(dst->label, src->label, src->len); 342 343 return dst; 344 } 345 346 static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi) 347 { 348 if (nfs_server_capable(&nfsi->vfs_inode, NFS_CAP_SECURITY_LABEL)) 349 nfsi->cache_validity |= NFS_INO_INVALID_LABEL; 350 } 351 #else 352 static inline struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags) { return NULL; } 353 static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi) 354 { 355 } 356 static inline struct nfs4_label * 357 nfs4_label_copy(struct nfs4_label *dst, struct nfs4_label *src) 358 { 359 return NULL; 360 } 361 #endif /* CONFIG_NFS_V4_SECURITY_LABEL */ 362 363 /* proc.c */ 364 void nfs_close_context(struct nfs_open_context *ctx, int is_sync); 365 extern struct nfs_client *nfs_init_client(struct nfs_client *clp, 366 const struct nfs_client_initdata *); 367 368 /* dir.c */ 369 extern void nfs_readdir_record_entry_cache_hit(struct inode *dir); 370 extern void nfs_readdir_record_entry_cache_miss(struct inode *dir); 371 extern unsigned long nfs_access_cache_count(struct shrinker *shrink, 372 struct shrink_control *sc); 373 extern unsigned long nfs_access_cache_scan(struct shrinker *shrink, 374 struct shrink_control *sc); 375 struct dentry *nfs_lookup(struct inode *, struct dentry *, unsigned int); 376 void nfs_d_prune_case_insensitive_aliases(struct inode *inode); 377 int nfs_create(struct user_namespace *, struct inode *, struct dentry *, 378 umode_t, bool); 379 int nfs_mkdir(struct user_namespace *, struct inode *, struct dentry *, 380 umode_t); 381 int nfs_rmdir(struct inode *, struct dentry *); 382 int nfs_unlink(struct inode *, struct dentry *); 383 int nfs_symlink(struct user_namespace *, struct inode *, struct dentry *, 384 const char *); 385 int nfs_link(struct dentry *, struct inode *, struct dentry *); 386 int nfs_mknod(struct user_namespace *, struct inode *, struct dentry *, umode_t, 387 dev_t); 388 int nfs_rename(struct user_namespace *, struct inode *, struct dentry *, 389 struct inode *, struct dentry *, unsigned int); 390 391 #ifdef CONFIG_NFS_V4_2 392 static inline __u32 nfs_access_xattr_mask(const struct nfs_server *server) 393 { 394 if (!(server->caps & NFS_CAP_XATTR)) 395 return 0; 396 return NFS4_ACCESS_XAREAD | NFS4_ACCESS_XAWRITE | NFS4_ACCESS_XALIST; 397 } 398 #else 399 static inline __u32 nfs_access_xattr_mask(const struct nfs_server *server) 400 { 401 return 0; 402 } 403 #endif 404 405 /* file.c */ 406 int nfs_file_fsync(struct file *file, loff_t start, loff_t end, int datasync); 407 loff_t nfs_file_llseek(struct file *, loff_t, int); 408 ssize_t nfs_file_read(struct kiocb *, struct iov_iter *); 409 int nfs_file_mmap(struct file *, struct vm_area_struct *); 410 ssize_t nfs_file_write(struct kiocb *, struct iov_iter *); 411 int nfs_file_release(struct inode *, struct file *); 412 int nfs_lock(struct file *, int, struct file_lock *); 413 int nfs_flock(struct file *, int, struct file_lock *); 414 int nfs_check_flags(int); 415 416 /* inode.c */ 417 extern struct workqueue_struct *nfsiod_workqueue; 418 extern struct inode *nfs_alloc_inode(struct super_block *sb); 419 extern void nfs_free_inode(struct inode *); 420 extern int nfs_write_inode(struct inode *, struct writeback_control *); 421 extern int nfs_drop_inode(struct inode *); 422 extern void nfs_clear_inode(struct inode *); 423 extern void nfs_evict_inode(struct inode *); 424 extern void nfs_zap_acl_cache(struct inode *inode); 425 extern void nfs_set_cache_invalid(struct inode *inode, unsigned long flags); 426 extern bool nfs_check_cache_invalid(struct inode *, unsigned long); 427 extern int nfs_wait_bit_killable(struct wait_bit_key *key, int mode); 428 extern int nfs_wait_atomic_killable(atomic_t *p, unsigned int mode); 429 430 /* super.c */ 431 extern const struct super_operations nfs_sops; 432 bool nfs_auth_info_match(const struct nfs_auth_info *, rpc_authflavor_t); 433 int nfs_try_get_tree(struct fs_context *); 434 int nfs_get_tree_common(struct fs_context *); 435 void nfs_kill_super(struct super_block *); 436 437 extern struct rpc_stat nfs_rpcstat; 438 439 extern int __init register_nfs_fs(void); 440 extern void __exit unregister_nfs_fs(void); 441 extern bool nfs_sb_active(struct super_block *sb); 442 extern void nfs_sb_deactive(struct super_block *sb); 443 extern int nfs_client_for_each_server(struct nfs_client *clp, 444 int (*fn)(struct nfs_server *, void *), 445 void *data); 446 /* io.c */ 447 extern void nfs_start_io_read(struct inode *inode); 448 extern void nfs_end_io_read(struct inode *inode); 449 extern void nfs_start_io_write(struct inode *inode); 450 extern void nfs_end_io_write(struct inode *inode); 451 extern void nfs_start_io_direct(struct inode *inode); 452 extern void nfs_end_io_direct(struct inode *inode); 453 454 static inline bool nfs_file_io_is_buffered(struct nfs_inode *nfsi) 455 { 456 return test_bit(NFS_INO_ODIRECT, &nfsi->flags) == 0; 457 } 458 459 /* namespace.c */ 460 #define NFS_PATH_CANONICAL 1 461 extern char *nfs_path(char **p, struct dentry *dentry, 462 char *buffer, ssize_t buflen, unsigned flags); 463 extern struct vfsmount *nfs_d_automount(struct path *path); 464 int nfs_submount(struct fs_context *, struct nfs_server *); 465 int nfs_do_submount(struct fs_context *); 466 467 /* getroot.c */ 468 extern int nfs_get_root(struct super_block *s, struct fs_context *fc); 469 #if IS_ENABLED(CONFIG_NFS_V4) 470 extern int nfs4_get_rootfh(struct nfs_server *server, struct nfs_fh *mntfh, bool); 471 #endif 472 473 struct nfs_pgio_completion_ops; 474 /* read.c */ 475 extern void nfs_pageio_init_read(struct nfs_pageio_descriptor *pgio, 476 struct inode *inode, bool force_mds, 477 const struct nfs_pgio_completion_ops *compl_ops); 478 extern void nfs_read_prepare(struct rpc_task *task, void *calldata); 479 extern void nfs_pageio_reset_read_mds(struct nfs_pageio_descriptor *pgio); 480 481 /* super.c */ 482 void nfs_umount_begin(struct super_block *); 483 int nfs_statfs(struct dentry *, struct kstatfs *); 484 int nfs_show_options(struct seq_file *, struct dentry *); 485 int nfs_show_devname(struct seq_file *, struct dentry *); 486 int nfs_show_path(struct seq_file *, struct dentry *); 487 int nfs_show_stats(struct seq_file *, struct dentry *); 488 int nfs_reconfigure(struct fs_context *); 489 490 /* write.c */ 491 extern void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio, 492 struct inode *inode, int ioflags, bool force_mds, 493 const struct nfs_pgio_completion_ops *compl_ops); 494 extern void nfs_pageio_reset_write_mds(struct nfs_pageio_descriptor *pgio); 495 extern void nfs_commit_free(struct nfs_commit_data *p); 496 extern void nfs_write_prepare(struct rpc_task *task, void *calldata); 497 extern void nfs_commit_prepare(struct rpc_task *task, void *calldata); 498 extern int nfs_initiate_commit(struct rpc_clnt *clnt, 499 struct nfs_commit_data *data, 500 const struct nfs_rpc_ops *nfs_ops, 501 const struct rpc_call_ops *call_ops, 502 int how, int flags); 503 extern void nfs_init_commit(struct nfs_commit_data *data, 504 struct list_head *head, 505 struct pnfs_layout_segment *lseg, 506 struct nfs_commit_info *cinfo); 507 int nfs_scan_commit_list(struct list_head *src, struct list_head *dst, 508 struct nfs_commit_info *cinfo, int max); 509 unsigned long nfs_reqs_to_commit(struct nfs_commit_info *); 510 int nfs_scan_commit(struct inode *inode, struct list_head *dst, 511 struct nfs_commit_info *cinfo); 512 void nfs_mark_request_commit(struct nfs_page *req, 513 struct pnfs_layout_segment *lseg, 514 struct nfs_commit_info *cinfo, 515 u32 ds_commit_idx); 516 int nfs_write_need_commit(struct nfs_pgio_header *); 517 void nfs_writeback_update_inode(struct nfs_pgio_header *hdr); 518 int nfs_generic_commit_list(struct inode *inode, struct list_head *head, 519 int how, struct nfs_commit_info *cinfo); 520 void nfs_retry_commit(struct list_head *page_list, 521 struct pnfs_layout_segment *lseg, 522 struct nfs_commit_info *cinfo, 523 u32 ds_commit_idx); 524 void nfs_commitdata_release(struct nfs_commit_data *data); 525 void nfs_request_add_commit_list(struct nfs_page *req, 526 struct nfs_commit_info *cinfo); 527 void nfs_request_add_commit_list_locked(struct nfs_page *req, 528 struct list_head *dst, 529 struct nfs_commit_info *cinfo); 530 void nfs_request_remove_commit_list(struct nfs_page *req, 531 struct nfs_commit_info *cinfo); 532 void nfs_init_cinfo(struct nfs_commit_info *cinfo, 533 struct inode *inode, 534 struct nfs_direct_req *dreq); 535 int nfs_key_timeout_notify(struct file *filp, struct inode *inode); 536 bool nfs_ctx_key_to_expire(struct nfs_open_context *ctx, struct inode *inode); 537 void nfs_pageio_stop_mirroring(struct nfs_pageio_descriptor *pgio); 538 539 int nfs_filemap_write_and_wait_range(struct address_space *mapping, 540 loff_t lstart, loff_t lend); 541 542 #ifdef CONFIG_NFS_V4_1 543 static inline void 544 pnfs_bucket_clear_pnfs_ds_commit_verifiers(struct pnfs_commit_bucket *buckets, 545 unsigned int nbuckets) 546 { 547 unsigned int i; 548 549 for (i = 0; i < nbuckets; i++) 550 buckets[i].direct_verf.committed = NFS_INVALID_STABLE_HOW; 551 } 552 static inline 553 void nfs_clear_pnfs_ds_commit_verifiers(struct pnfs_ds_commit_info *cinfo) 554 { 555 struct pnfs_commit_array *array; 556 557 rcu_read_lock(); 558 list_for_each_entry_rcu(array, &cinfo->commits, cinfo_list) 559 pnfs_bucket_clear_pnfs_ds_commit_verifiers(array->buckets, 560 array->nbuckets); 561 rcu_read_unlock(); 562 } 563 #else 564 static inline 565 void nfs_clear_pnfs_ds_commit_verifiers(struct pnfs_ds_commit_info *cinfo) 566 { 567 } 568 #endif 569 570 #ifdef CONFIG_MIGRATION 571 extern int nfs_migrate_page(struct address_space *, 572 struct page *, struct page *, enum migrate_mode); 573 #endif 574 575 static inline int 576 nfs_write_verifier_cmp(const struct nfs_write_verifier *v1, 577 const struct nfs_write_verifier *v2) 578 { 579 return memcmp(v1->data, v2->data, sizeof(v1->data)); 580 } 581 582 static inline bool 583 nfs_write_match_verf(const struct nfs_writeverf *verf, 584 struct nfs_page *req) 585 { 586 return verf->committed > NFS_UNSTABLE && 587 !nfs_write_verifier_cmp(&req->wb_verf, &verf->verifier); 588 } 589 590 static inline gfp_t nfs_io_gfp_mask(void) 591 { 592 if (current->flags & PF_WQ_WORKER) 593 return GFP_KERNEL | __GFP_NORETRY | __GFP_NOWARN; 594 return GFP_KERNEL; 595 } 596 597 /* unlink.c */ 598 extern struct rpc_task * 599 nfs_async_rename(struct inode *old_dir, struct inode *new_dir, 600 struct dentry *old_dentry, struct dentry *new_dentry, 601 void (*complete)(struct rpc_task *, struct nfs_renamedata *)); 602 extern int nfs_sillyrename(struct inode *dir, struct dentry *dentry); 603 604 /* direct.c */ 605 void nfs_init_cinfo_from_dreq(struct nfs_commit_info *cinfo, 606 struct nfs_direct_req *dreq); 607 extern ssize_t nfs_dreq_bytes_left(struct nfs_direct_req *dreq); 608 609 /* nfs4proc.c */ 610 extern struct nfs_client *nfs4_init_client(struct nfs_client *clp, 611 const struct nfs_client_initdata *); 612 extern int nfs40_walk_client_list(struct nfs_client *clp, 613 struct nfs_client **result, 614 const struct cred *cred); 615 extern int nfs41_walk_client_list(struct nfs_client *clp, 616 struct nfs_client **result, 617 const struct cred *cred); 618 extern void nfs4_test_session_trunk(struct rpc_clnt *clnt, 619 struct rpc_xprt *xprt, 620 void *data); 621 622 static inline struct inode *nfs_igrab_and_active(struct inode *inode) 623 { 624 struct super_block *sb = inode->i_sb; 625 626 if (sb && nfs_sb_active(sb)) { 627 if (igrab(inode)) 628 return inode; 629 nfs_sb_deactive(sb); 630 } 631 return NULL; 632 } 633 634 static inline void nfs_iput_and_deactive(struct inode *inode) 635 { 636 if (inode != NULL) { 637 struct super_block *sb = inode->i_sb; 638 639 iput(inode); 640 nfs_sb_deactive(sb); 641 } 642 } 643 644 /* 645 * Determine the device name as a string 646 */ 647 static inline char *nfs_devname(struct dentry *dentry, 648 char *buffer, ssize_t buflen) 649 { 650 char *dummy; 651 return nfs_path(&dummy, dentry, buffer, buflen, NFS_PATH_CANONICAL); 652 } 653 654 /* 655 * Determine the actual block size (and log2 thereof) 656 */ 657 static inline 658 unsigned long nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp) 659 { 660 /* make sure blocksize is a power of two */ 661 if ((bsize & (bsize - 1)) || nrbitsp) { 662 unsigned char nrbits; 663 664 for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--) 665 ; 666 bsize = 1 << nrbits; 667 if (nrbitsp) 668 *nrbitsp = nrbits; 669 } 670 671 return bsize; 672 } 673 674 /* 675 * Calculate the number of 512byte blocks used. 676 */ 677 static inline blkcnt_t nfs_calc_block_size(u64 tsize) 678 { 679 blkcnt_t used = (tsize + 511) >> 9; 680 return (used > ULONG_MAX) ? ULONG_MAX : used; 681 } 682 683 /* 684 * Compute and set NFS server blocksize 685 */ 686 static inline 687 unsigned long nfs_block_size(unsigned long bsize, unsigned char *nrbitsp) 688 { 689 if (bsize < NFS_MIN_FILE_IO_SIZE) 690 bsize = NFS_DEF_FILE_IO_SIZE; 691 else if (bsize >= NFS_MAX_FILE_IO_SIZE) 692 bsize = NFS_MAX_FILE_IO_SIZE; 693 694 return nfs_block_bits(bsize, nrbitsp); 695 } 696 697 /* 698 * Determine the maximum file size for a superblock 699 */ 700 static inline 701 void nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize) 702 { 703 sb->s_maxbytes = (loff_t)maxfilesize; 704 if (sb->s_maxbytes > MAX_LFS_FILESIZE || sb->s_maxbytes <= 0) 705 sb->s_maxbytes = MAX_LFS_FILESIZE; 706 } 707 708 /* 709 * Record the page as unstable (an extra writeback period) and mark its 710 * inode as dirty. 711 */ 712 static inline 713 void nfs_mark_page_unstable(struct page *page, struct nfs_commit_info *cinfo) 714 { 715 if (!cinfo->dreq) { 716 struct inode *inode = page_file_mapping(page)->host; 717 718 /* This page is really still in write-back - just that the 719 * writeback is happening on the server now. 720 */ 721 inc_node_page_state(page, NR_WRITEBACK); 722 inc_wb_stat(&inode_to_bdi(inode)->wb, WB_WRITEBACK); 723 __mark_inode_dirty(inode, I_DIRTY_DATASYNC); 724 } 725 } 726 727 /* 728 * Determine the number of bytes of data the page contains 729 */ 730 static inline 731 unsigned int nfs_page_length(struct page *page) 732 { 733 loff_t i_size = i_size_read(page_file_mapping(page)->host); 734 735 if (i_size > 0) { 736 pgoff_t index = page_index(page); 737 pgoff_t end_index = (i_size - 1) >> PAGE_SHIFT; 738 if (index < end_index) 739 return PAGE_SIZE; 740 if (index == end_index) 741 return ((i_size - 1) & ~PAGE_MASK) + 1; 742 } 743 return 0; 744 } 745 746 /* 747 * Convert a umode to a dirent->d_type 748 */ 749 static inline 750 unsigned char nfs_umode_to_dtype(umode_t mode) 751 { 752 return (mode >> 12) & 15; 753 } 754 755 /* 756 * Determine the number of pages in an array of length 'len' and 757 * with a base offset of 'base' 758 */ 759 static inline 760 unsigned int nfs_page_array_len(unsigned int base, size_t len) 761 { 762 return ((unsigned long)len + (unsigned long)base + 763 PAGE_SIZE - 1) >> PAGE_SHIFT; 764 } 765 766 /* 767 * Convert a struct timespec64 into a 64-bit change attribute 768 * 769 * This does approximately the same thing as timespec64_to_ns(), 770 * but for calculation efficiency, we multiply the seconds by 771 * 1024*1024*1024. 772 */ 773 static inline 774 u64 nfs_timespec_to_change_attr(const struct timespec64 *ts) 775 { 776 return ((u64)ts->tv_sec << 30) + ts->tv_nsec; 777 } 778 779 #ifdef CONFIG_CRC32 780 /** 781 * nfs_fhandle_hash - calculate the crc32 hash for the filehandle 782 * @fh - pointer to filehandle 783 * 784 * returns a crc32 hash for the filehandle that is compatible with 785 * the one displayed by "wireshark". 786 */ 787 static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh) 788 { 789 return ~crc32_le(0xFFFFFFFF, &fh->data[0], fh->size); 790 } 791 static inline u32 nfs_stateid_hash(const nfs4_stateid *stateid) 792 { 793 return ~crc32_le(0xFFFFFFFF, &stateid->other[0], 794 NFS4_STATEID_OTHER_SIZE); 795 } 796 #else 797 static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh) 798 { 799 return 0; 800 } 801 static inline u32 nfs_stateid_hash(nfs4_stateid *stateid) 802 { 803 return 0; 804 } 805 #endif 806 807 static inline bool nfs_error_is_fatal(int err) 808 { 809 switch (err) { 810 case -ERESTARTSYS: 811 case -EINTR: 812 case -EACCES: 813 case -EDQUOT: 814 case -EFBIG: 815 case -EIO: 816 case -ENOSPC: 817 case -EROFS: 818 case -ESTALE: 819 case -E2BIG: 820 case -ENOMEM: 821 case -ETIMEDOUT: 822 return true; 823 default: 824 return false; 825 } 826 } 827 828 static inline bool nfs_error_is_fatal_on_server(int err) 829 { 830 switch (err) { 831 case 0: 832 case -ERESTARTSYS: 833 case -EINTR: 834 return false; 835 } 836 return nfs_error_is_fatal(err); 837 } 838 839 /* 840 * Select between a default port value and a user-specified port value. 841 * If a zero value is set, then autobind will be used. 842 */ 843 static inline void nfs_set_port(struct sockaddr *sap, int *port, 844 const unsigned short default_port) 845 { 846 if (*port == NFS_UNSPEC_PORT) 847 *port = default_port; 848 849 rpc_set_port(sap, *port); 850 } 851