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 /* 60 * Maximum number of pages that readdir can use for creating 61 * a vmapped array of pages. 62 */ 63 #define NFS_MAX_READDIR_PAGES 8 64 65 struct nfs_client_initdata { 66 unsigned long init_flags; 67 const char *hostname; /* Hostname of the server */ 68 const struct sockaddr *addr; /* Address of the server */ 69 const char *nodename; /* Hostname of the client */ 70 const char *ip_addr; /* IP address of the client */ 71 size_t addrlen; 72 struct nfs_subversion *nfs_mod; 73 int proto; 74 u32 minorversion; 75 unsigned int nconnect; 76 struct net *net; 77 const struct rpc_timeout *timeparms; 78 const struct cred *cred; 79 }; 80 81 /* 82 * In-kernel mount arguments 83 */ 84 struct nfs_fs_context { 85 bool internal; 86 bool skip_reconfig_option_check; 87 bool need_mount; 88 bool sloppy; 89 unsigned int flags; /* NFS{,4}_MOUNT_* flags */ 90 unsigned int rsize, wsize; 91 unsigned int timeo, retrans; 92 unsigned int acregmin, acregmax; 93 unsigned int acdirmin, acdirmax; 94 unsigned int namlen; 95 unsigned int options; 96 unsigned int bsize; 97 struct nfs_auth_info auth_info; 98 rpc_authflavor_t selected_flavor; 99 char *client_address; 100 unsigned int version; 101 unsigned int minorversion; 102 char *fscache_uniq; 103 unsigned short protofamily; 104 unsigned short mountfamily; 105 106 struct { 107 union { 108 struct sockaddr address; 109 struct sockaddr_storage _address; 110 }; 111 size_t addrlen; 112 char *hostname; 113 u32 version; 114 int port; 115 unsigned short protocol; 116 } mount_server; 117 118 struct { 119 union { 120 struct sockaddr address; 121 struct sockaddr_storage _address; 122 }; 123 size_t addrlen; 124 char *hostname; 125 char *export_path; 126 int port; 127 unsigned short protocol; 128 unsigned short nconnect; 129 unsigned short export_path_len; 130 } nfs_server; 131 132 struct nfs_fh *mntfh; 133 struct nfs_server *server; 134 struct nfs_subversion *nfs_mod; 135 136 /* Information for a cloned mount. */ 137 struct nfs_clone_mount { 138 struct super_block *sb; 139 struct dentry *dentry; 140 struct nfs_fattr *fattr; 141 unsigned int inherited_bsize; 142 } clone_data; 143 }; 144 145 #define nfs_errorf(fc, fmt, ...) ((fc)->log.log ? \ 146 errorf(fc, fmt, ## __VA_ARGS__) : \ 147 ({ dprintk(fmt "\n", ## __VA_ARGS__); })) 148 149 #define nfs_ferrorf(fc, fac, fmt, ...) ((fc)->log.log ? \ 150 errorf(fc, fmt, ## __VA_ARGS__) : \ 151 ({ dfprintk(fac, fmt "\n", ## __VA_ARGS__); })) 152 153 #define nfs_invalf(fc, fmt, ...) ((fc)->log.log ? \ 154 invalf(fc, fmt, ## __VA_ARGS__) : \ 155 ({ dprintk(fmt "\n", ## __VA_ARGS__); -EINVAL; })) 156 157 #define nfs_finvalf(fc, fac, fmt, ...) ((fc)->log.log ? \ 158 invalf(fc, fmt, ## __VA_ARGS__) : \ 159 ({ dfprintk(fac, fmt "\n", ## __VA_ARGS__); -EINVAL; })) 160 161 #define nfs_warnf(fc, fmt, ...) ((fc)->log.log ? \ 162 warnf(fc, fmt, ## __VA_ARGS__) : \ 163 ({ dprintk(fmt "\n", ## __VA_ARGS__); })) 164 165 #define nfs_fwarnf(fc, fac, fmt, ...) ((fc)->log.log ? \ 166 warnf(fc, fmt, ## __VA_ARGS__) : \ 167 ({ dfprintk(fac, fmt "\n", ## __VA_ARGS__); })) 168 169 static inline struct nfs_fs_context *nfs_fc2context(const struct fs_context *fc) 170 { 171 return fc->fs_private; 172 } 173 174 /* mount_clnt.c */ 175 struct nfs_mount_request { 176 struct sockaddr *sap; 177 size_t salen; 178 char *hostname; 179 char *dirpath; 180 u32 version; 181 unsigned short protocol; 182 struct nfs_fh *fh; 183 int noresvport; 184 unsigned int *auth_flav_len; 185 rpc_authflavor_t *auth_flavs; 186 struct net *net; 187 }; 188 189 extern int nfs_mount(struct nfs_mount_request *info); 190 extern void nfs_umount(const struct nfs_mount_request *info); 191 192 /* client.c */ 193 extern const struct rpc_program nfs_program; 194 extern void nfs_clients_init(struct net *net); 195 extern void nfs_clients_exit(struct net *net); 196 extern struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *); 197 int nfs_create_rpc_client(struct nfs_client *, const struct nfs_client_initdata *, rpc_authflavor_t); 198 struct nfs_client *nfs_get_client(const struct nfs_client_initdata *); 199 int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *, struct nfs_fattr *); 200 void nfs_server_insert_lists(struct nfs_server *); 201 void nfs_server_remove_lists(struct nfs_server *); 202 void nfs_init_timeout_values(struct rpc_timeout *to, int proto, int timeo, int retrans); 203 int nfs_init_server_rpcclient(struct nfs_server *, const struct rpc_timeout *t, 204 rpc_authflavor_t); 205 struct nfs_server *nfs_alloc_server(void); 206 void nfs_server_copy_userdata(struct nfs_server *, struct nfs_server *); 207 208 extern void nfs_put_client(struct nfs_client *); 209 extern void nfs_free_client(struct nfs_client *); 210 extern struct nfs_client *nfs4_find_client_ident(struct net *, int); 211 extern struct nfs_client * 212 nfs4_find_client_sessionid(struct net *, const struct sockaddr *, 213 struct nfs4_sessionid *, u32); 214 extern struct nfs_server *nfs_create_server(struct fs_context *); 215 extern struct nfs_server *nfs4_create_server(struct fs_context *); 216 extern struct nfs_server *nfs4_create_referral_server(struct fs_context *); 217 extern int nfs4_update_server(struct nfs_server *server, const char *hostname, 218 struct sockaddr *sap, size_t salen, 219 struct net *net); 220 extern void nfs_free_server(struct nfs_server *server); 221 extern struct nfs_server *nfs_clone_server(struct nfs_server *, 222 struct nfs_fh *, 223 struct nfs_fattr *, 224 rpc_authflavor_t); 225 extern bool nfs_client_init_is_complete(const struct nfs_client *clp); 226 extern int nfs_client_init_status(const struct nfs_client *clp); 227 extern int nfs_wait_client_init_complete(const struct nfs_client *clp); 228 extern void nfs_mark_client_ready(struct nfs_client *clp, int state); 229 extern struct nfs_client *nfs4_set_ds_client(struct nfs_server *mds_srv, 230 const struct sockaddr *ds_addr, 231 int ds_addrlen, int ds_proto, 232 unsigned int ds_timeo, 233 unsigned int ds_retrans, 234 u32 minor_version); 235 extern struct rpc_clnt *nfs4_find_or_create_ds_client(struct nfs_client *, 236 struct inode *); 237 extern struct nfs_client *nfs3_set_ds_client(struct nfs_server *mds_srv, 238 const struct sockaddr *ds_addr, int ds_addrlen, 239 int ds_proto, unsigned int ds_timeo, 240 unsigned int ds_retrans); 241 #ifdef CONFIG_PROC_FS 242 extern int __init nfs_fs_proc_init(void); 243 extern void nfs_fs_proc_exit(void); 244 extern int nfs_fs_proc_net_init(struct net *net); 245 extern void nfs_fs_proc_net_exit(struct net *net); 246 #else 247 static inline int nfs_fs_proc_net_init(struct net *net) 248 { 249 return 0; 250 } 251 static inline void nfs_fs_proc_net_exit(struct net *net) 252 { 253 } 254 static inline int nfs_fs_proc_init(void) 255 { 256 return 0; 257 } 258 static inline void nfs_fs_proc_exit(void) 259 { 260 } 261 #endif 262 263 /* callback_xdr.c */ 264 extern const struct svc_version nfs4_callback_version1; 265 extern const struct svc_version nfs4_callback_version4; 266 267 /* fs_context.c */ 268 extern struct file_system_type nfs_fs_type; 269 270 /* pagelist.c */ 271 extern int __init nfs_init_nfspagecache(void); 272 extern void nfs_destroy_nfspagecache(void); 273 extern int __init nfs_init_readpagecache(void); 274 extern void nfs_destroy_readpagecache(void); 275 extern int __init nfs_init_writepagecache(void); 276 extern void nfs_destroy_writepagecache(void); 277 278 extern int __init nfs_init_directcache(void); 279 extern void nfs_destroy_directcache(void); 280 extern void nfs_pgheader_init(struct nfs_pageio_descriptor *desc, 281 struct nfs_pgio_header *hdr, 282 void (*release)(struct nfs_pgio_header *hdr)); 283 void nfs_set_pgio_error(struct nfs_pgio_header *hdr, int error, loff_t pos); 284 int nfs_iocounter_wait(struct nfs_lock_context *l_ctx); 285 286 extern const struct nfs_pageio_ops nfs_pgio_rw_ops; 287 struct nfs_pgio_header *nfs_pgio_header_alloc(const struct nfs_rw_ops *); 288 void nfs_pgio_header_free(struct nfs_pgio_header *); 289 int nfs_generic_pgio(struct nfs_pageio_descriptor *, struct nfs_pgio_header *); 290 int nfs_initiate_pgio(struct rpc_clnt *clnt, struct nfs_pgio_header *hdr, 291 const struct cred *cred, const struct nfs_rpc_ops *rpc_ops, 292 const struct rpc_call_ops *call_ops, int how, int flags); 293 void nfs_free_request(struct nfs_page *req); 294 struct nfs_pgio_mirror * 295 nfs_pgio_current_mirror(struct nfs_pageio_descriptor *desc); 296 297 static inline bool nfs_match_open_context(const struct nfs_open_context *ctx1, 298 const struct nfs_open_context *ctx2) 299 { 300 return cred_fscmp(ctx1->cred, ctx2->cred) == 0 && ctx1->state == ctx2->state; 301 } 302 303 /* nfs2xdr.c */ 304 extern const struct rpc_procinfo nfs_procedures[]; 305 extern int nfs2_decode_dirent(struct xdr_stream *, 306 struct nfs_entry *, bool); 307 308 /* nfs3xdr.c */ 309 extern const struct rpc_procinfo nfs3_procedures[]; 310 extern int nfs3_decode_dirent(struct xdr_stream *, 311 struct nfs_entry *, bool); 312 313 /* nfs4xdr.c */ 314 #if IS_ENABLED(CONFIG_NFS_V4) 315 extern int nfs4_decode_dirent(struct xdr_stream *, 316 struct nfs_entry *, bool); 317 #endif 318 #ifdef CONFIG_NFS_V4_1 319 extern const u32 nfs41_maxread_overhead; 320 extern const u32 nfs41_maxwrite_overhead; 321 extern const u32 nfs41_maxgetdevinfo_overhead; 322 #endif 323 324 /* nfs4proc.c */ 325 #if IS_ENABLED(CONFIG_NFS_V4) 326 extern const struct rpc_procinfo nfs4_procedures[]; 327 #endif 328 329 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 330 extern struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags); 331 static inline struct nfs4_label * 332 nfs4_label_copy(struct nfs4_label *dst, struct nfs4_label *src) 333 { 334 if (!dst || !src) 335 return NULL; 336 337 if (src->len > NFS4_MAXLABELLEN) 338 return NULL; 339 340 dst->lfs = src->lfs; 341 dst->pi = src->pi; 342 dst->len = src->len; 343 memcpy(dst->label, src->label, src->len); 344 345 return dst; 346 } 347 static inline void nfs4_label_free(struct nfs4_label *label) 348 { 349 if (label) { 350 kfree(label->label); 351 kfree(label); 352 } 353 return; 354 } 355 356 static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi) 357 { 358 if (nfs_server_capable(&nfsi->vfs_inode, NFS_CAP_SECURITY_LABEL)) 359 nfsi->cache_validity |= NFS_INO_INVALID_LABEL; 360 } 361 #else 362 static inline struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags) { return NULL; } 363 static inline void nfs4_label_free(void *label) {} 364 static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi) 365 { 366 } 367 static inline struct nfs4_label * 368 nfs4_label_copy(struct nfs4_label *dst, struct nfs4_label *src) 369 { 370 return NULL; 371 } 372 #endif /* CONFIG_NFS_V4_SECURITY_LABEL */ 373 374 /* proc.c */ 375 void nfs_close_context(struct nfs_open_context *ctx, int is_sync); 376 extern struct nfs_client *nfs_init_client(struct nfs_client *clp, 377 const struct nfs_client_initdata *); 378 379 /* dir.c */ 380 extern void nfs_advise_use_readdirplus(struct inode *dir); 381 extern void nfs_force_use_readdirplus(struct inode *dir); 382 extern unsigned long nfs_access_cache_count(struct shrinker *shrink, 383 struct shrink_control *sc); 384 extern unsigned long nfs_access_cache_scan(struct shrinker *shrink, 385 struct shrink_control *sc); 386 struct dentry *nfs_lookup(struct inode *, struct dentry *, unsigned int); 387 int nfs_create(struct inode *, struct dentry *, umode_t, bool); 388 int nfs_mkdir(struct inode *, struct dentry *, umode_t); 389 int nfs_rmdir(struct inode *, struct dentry *); 390 int nfs_unlink(struct inode *, struct dentry *); 391 int nfs_symlink(struct inode *, struct dentry *, const char *); 392 int nfs_link(struct dentry *, struct inode *, struct dentry *); 393 int nfs_mknod(struct inode *, struct dentry *, umode_t, dev_t); 394 int nfs_rename(struct inode *, struct dentry *, 395 struct inode *, struct dentry *, unsigned int); 396 397 /* file.c */ 398 int nfs_file_fsync(struct file *file, loff_t start, loff_t end, int datasync); 399 loff_t nfs_file_llseek(struct file *, loff_t, int); 400 ssize_t nfs_file_read(struct kiocb *, struct iov_iter *); 401 int nfs_file_mmap(struct file *, struct vm_area_struct *); 402 ssize_t nfs_file_write(struct kiocb *, struct iov_iter *); 403 int nfs_file_release(struct inode *, struct file *); 404 int nfs_lock(struct file *, int, struct file_lock *); 405 int nfs_flock(struct file *, int, struct file_lock *); 406 int nfs_check_flags(int); 407 408 /* inode.c */ 409 extern struct workqueue_struct *nfsiod_workqueue; 410 extern struct inode *nfs_alloc_inode(struct super_block *sb); 411 extern void nfs_free_inode(struct inode *); 412 extern int nfs_write_inode(struct inode *, struct writeback_control *); 413 extern int nfs_drop_inode(struct inode *); 414 extern void nfs_clear_inode(struct inode *); 415 extern void nfs_evict_inode(struct inode *); 416 void nfs_zap_acl_cache(struct inode *inode); 417 extern bool nfs_check_cache_invalid(struct inode *, unsigned long); 418 extern int nfs_wait_bit_killable(struct wait_bit_key *key, int mode); 419 extern int nfs_wait_atomic_killable(atomic_t *p, unsigned int mode); 420 421 /* super.c */ 422 extern const struct super_operations nfs_sops; 423 bool nfs_auth_info_match(const struct nfs_auth_info *, rpc_authflavor_t); 424 int nfs_try_get_tree(struct fs_context *); 425 int nfs_get_tree_common(struct fs_context *); 426 void nfs_kill_super(struct super_block *); 427 428 extern struct rpc_stat nfs_rpcstat; 429 430 extern int __init register_nfs_fs(void); 431 extern void __exit unregister_nfs_fs(void); 432 extern bool nfs_sb_active(struct super_block *sb); 433 extern void nfs_sb_deactive(struct super_block *sb); 434 extern int nfs_client_for_each_server(struct nfs_client *clp, 435 int (*fn)(struct nfs_server *, void *), 436 void *data); 437 /* io.c */ 438 extern void nfs_start_io_read(struct inode *inode); 439 extern void nfs_end_io_read(struct inode *inode); 440 extern void nfs_start_io_write(struct inode *inode); 441 extern void nfs_end_io_write(struct inode *inode); 442 extern void nfs_start_io_direct(struct inode *inode); 443 extern void nfs_end_io_direct(struct inode *inode); 444 445 static inline bool nfs_file_io_is_buffered(struct nfs_inode *nfsi) 446 { 447 return test_bit(NFS_INO_ODIRECT, &nfsi->flags) == 0; 448 } 449 450 /* namespace.c */ 451 #define NFS_PATH_CANONICAL 1 452 extern char *nfs_path(char **p, struct dentry *dentry, 453 char *buffer, ssize_t buflen, unsigned flags); 454 extern struct vfsmount *nfs_d_automount(struct path *path); 455 int nfs_submount(struct fs_context *, struct nfs_server *); 456 int nfs_do_submount(struct fs_context *); 457 458 /* getroot.c */ 459 extern int nfs_get_root(struct super_block *s, struct fs_context *fc); 460 #if IS_ENABLED(CONFIG_NFS_V4) 461 extern int nfs4_get_rootfh(struct nfs_server *server, struct nfs_fh *mntfh, bool); 462 #endif 463 464 struct nfs_pgio_completion_ops; 465 /* read.c */ 466 extern void nfs_pageio_init_read(struct nfs_pageio_descriptor *pgio, 467 struct inode *inode, bool force_mds, 468 const struct nfs_pgio_completion_ops *compl_ops); 469 extern void nfs_read_prepare(struct rpc_task *task, void *calldata); 470 extern void nfs_pageio_reset_read_mds(struct nfs_pageio_descriptor *pgio); 471 472 /* super.c */ 473 void nfs_umount_begin(struct super_block *); 474 int nfs_statfs(struct dentry *, struct kstatfs *); 475 int nfs_show_options(struct seq_file *, struct dentry *); 476 int nfs_show_devname(struct seq_file *, struct dentry *); 477 int nfs_show_path(struct seq_file *, struct dentry *); 478 int nfs_show_stats(struct seq_file *, struct dentry *); 479 int nfs_reconfigure(struct fs_context *); 480 481 /* write.c */ 482 extern void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio, 483 struct inode *inode, int ioflags, bool force_mds, 484 const struct nfs_pgio_completion_ops *compl_ops); 485 extern void nfs_pageio_reset_write_mds(struct nfs_pageio_descriptor *pgio); 486 extern void nfs_commit_free(struct nfs_commit_data *p); 487 extern void nfs_write_prepare(struct rpc_task *task, void *calldata); 488 extern void nfs_commit_prepare(struct rpc_task *task, void *calldata); 489 extern int nfs_initiate_commit(struct rpc_clnt *clnt, 490 struct nfs_commit_data *data, 491 const struct nfs_rpc_ops *nfs_ops, 492 const struct rpc_call_ops *call_ops, 493 int how, int flags); 494 extern void nfs_init_commit(struct nfs_commit_data *data, 495 struct list_head *head, 496 struct pnfs_layout_segment *lseg, 497 struct nfs_commit_info *cinfo); 498 int nfs_scan_commit_list(struct list_head *src, struct list_head *dst, 499 struct nfs_commit_info *cinfo, int max); 500 unsigned long nfs_reqs_to_commit(struct nfs_commit_info *); 501 int nfs_scan_commit(struct inode *inode, struct list_head *dst, 502 struct nfs_commit_info *cinfo); 503 void nfs_mark_request_commit(struct nfs_page *req, 504 struct pnfs_layout_segment *lseg, 505 struct nfs_commit_info *cinfo, 506 u32 ds_commit_idx); 507 int nfs_write_need_commit(struct nfs_pgio_header *); 508 void nfs_writeback_update_inode(struct nfs_pgio_header *hdr); 509 int nfs_generic_commit_list(struct inode *inode, struct list_head *head, 510 int how, struct nfs_commit_info *cinfo); 511 void nfs_retry_commit(struct list_head *page_list, 512 struct pnfs_layout_segment *lseg, 513 struct nfs_commit_info *cinfo, 514 u32 ds_commit_idx); 515 void nfs_commitdata_release(struct nfs_commit_data *data); 516 void nfs_request_add_commit_list(struct nfs_page *req, 517 struct nfs_commit_info *cinfo); 518 void nfs_request_add_commit_list_locked(struct nfs_page *req, 519 struct list_head *dst, 520 struct nfs_commit_info *cinfo); 521 void nfs_request_remove_commit_list(struct nfs_page *req, 522 struct nfs_commit_info *cinfo); 523 void nfs_init_cinfo(struct nfs_commit_info *cinfo, 524 struct inode *inode, 525 struct nfs_direct_req *dreq); 526 int nfs_key_timeout_notify(struct file *filp, struct inode *inode); 527 bool nfs_ctx_key_to_expire(struct nfs_open_context *ctx, struct inode *inode); 528 void nfs_pageio_stop_mirroring(struct nfs_pageio_descriptor *pgio); 529 530 int nfs_filemap_write_and_wait_range(struct address_space *mapping, 531 loff_t lstart, loff_t lend); 532 533 #ifdef CONFIG_NFS_V4_1 534 static inline void 535 pnfs_bucket_clear_pnfs_ds_commit_verifiers(struct pnfs_commit_bucket *buckets, 536 unsigned int nbuckets) 537 { 538 unsigned int i; 539 540 for (i = 0; i < nbuckets; i++) 541 buckets[i].direct_verf.committed = NFS_INVALID_STABLE_HOW; 542 } 543 static inline 544 void nfs_clear_pnfs_ds_commit_verifiers(struct pnfs_ds_commit_info *cinfo) 545 { 546 struct pnfs_commit_array *array; 547 548 rcu_read_lock(); 549 list_for_each_entry_rcu(array, &cinfo->commits, cinfo_list) 550 pnfs_bucket_clear_pnfs_ds_commit_verifiers(array->buckets, 551 array->nbuckets); 552 rcu_read_unlock(); 553 } 554 #else 555 static inline 556 void nfs_clear_pnfs_ds_commit_verifiers(struct pnfs_ds_commit_info *cinfo) 557 { 558 } 559 #endif 560 561 #ifdef CONFIG_MIGRATION 562 extern int nfs_migrate_page(struct address_space *, 563 struct page *, struct page *, enum migrate_mode); 564 #endif 565 566 static inline int 567 nfs_write_verifier_cmp(const struct nfs_write_verifier *v1, 568 const struct nfs_write_verifier *v2) 569 { 570 return memcmp(v1->data, v2->data, sizeof(v1->data)); 571 } 572 573 static inline bool 574 nfs_write_match_verf(const struct nfs_writeverf *verf, 575 struct nfs_page *req) 576 { 577 return verf->committed > NFS_UNSTABLE && 578 !nfs_write_verifier_cmp(&req->wb_verf, &verf->verifier); 579 } 580 581 /* unlink.c */ 582 extern struct rpc_task * 583 nfs_async_rename(struct inode *old_dir, struct inode *new_dir, 584 struct dentry *old_dentry, struct dentry *new_dentry, 585 void (*complete)(struct rpc_task *, struct nfs_renamedata *)); 586 extern int nfs_sillyrename(struct inode *dir, struct dentry *dentry); 587 588 /* direct.c */ 589 void nfs_init_cinfo_from_dreq(struct nfs_commit_info *cinfo, 590 struct nfs_direct_req *dreq); 591 extern ssize_t nfs_dreq_bytes_left(struct nfs_direct_req *dreq); 592 593 /* nfs4proc.c */ 594 extern struct nfs_client *nfs4_init_client(struct nfs_client *clp, 595 const struct nfs_client_initdata *); 596 extern int nfs40_walk_client_list(struct nfs_client *clp, 597 struct nfs_client **result, 598 const struct cred *cred); 599 extern int nfs41_walk_client_list(struct nfs_client *clp, 600 struct nfs_client **result, 601 const struct cred *cred); 602 extern void nfs4_test_session_trunk(struct rpc_clnt *clnt, 603 struct rpc_xprt *xprt, 604 void *data); 605 606 static inline struct inode *nfs_igrab_and_active(struct inode *inode) 607 { 608 inode = igrab(inode); 609 if (inode != NULL && !nfs_sb_active(inode->i_sb)) { 610 iput(inode); 611 inode = NULL; 612 } 613 return inode; 614 } 615 616 static inline void nfs_iput_and_deactive(struct inode *inode) 617 { 618 if (inode != NULL) { 619 struct super_block *sb = inode->i_sb; 620 621 iput(inode); 622 nfs_sb_deactive(sb); 623 } 624 } 625 626 /* 627 * Determine the device name as a string 628 */ 629 static inline char *nfs_devname(struct dentry *dentry, 630 char *buffer, ssize_t buflen) 631 { 632 char *dummy; 633 return nfs_path(&dummy, dentry, buffer, buflen, NFS_PATH_CANONICAL); 634 } 635 636 /* 637 * Determine the actual block size (and log2 thereof) 638 */ 639 static inline 640 unsigned long nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp) 641 { 642 /* make sure blocksize is a power of two */ 643 if ((bsize & (bsize - 1)) || nrbitsp) { 644 unsigned char nrbits; 645 646 for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--) 647 ; 648 bsize = 1 << nrbits; 649 if (nrbitsp) 650 *nrbitsp = nrbits; 651 } 652 653 return bsize; 654 } 655 656 /* 657 * Calculate the number of 512byte blocks used. 658 */ 659 static inline blkcnt_t nfs_calc_block_size(u64 tsize) 660 { 661 blkcnt_t used = (tsize + 511) >> 9; 662 return (used > ULONG_MAX) ? ULONG_MAX : used; 663 } 664 665 /* 666 * Compute and set NFS server blocksize 667 */ 668 static inline 669 unsigned long nfs_block_size(unsigned long bsize, unsigned char *nrbitsp) 670 { 671 if (bsize < NFS_MIN_FILE_IO_SIZE) 672 bsize = NFS_DEF_FILE_IO_SIZE; 673 else if (bsize >= NFS_MAX_FILE_IO_SIZE) 674 bsize = NFS_MAX_FILE_IO_SIZE; 675 676 return nfs_block_bits(bsize, nrbitsp); 677 } 678 679 /* 680 * Determine the maximum file size for a superblock 681 */ 682 static inline 683 void nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize) 684 { 685 sb->s_maxbytes = (loff_t)maxfilesize; 686 if (sb->s_maxbytes > MAX_LFS_FILESIZE || sb->s_maxbytes <= 0) 687 sb->s_maxbytes = MAX_LFS_FILESIZE; 688 } 689 690 /* 691 * Record the page as unstable (an extra writeback period) and mark its 692 * inode as dirty. 693 */ 694 static inline 695 void nfs_mark_page_unstable(struct page *page, struct nfs_commit_info *cinfo) 696 { 697 if (!cinfo->dreq) { 698 struct inode *inode = page_file_mapping(page)->host; 699 700 /* This page is really still in write-back - just that the 701 * writeback is happening on the server now. 702 */ 703 inc_node_page_state(page, NR_WRITEBACK); 704 inc_wb_stat(&inode_to_bdi(inode)->wb, WB_WRITEBACK); 705 __mark_inode_dirty(inode, I_DIRTY_DATASYNC); 706 } 707 } 708 709 /* 710 * Determine the number of bytes of data the page contains 711 */ 712 static inline 713 unsigned int nfs_page_length(struct page *page) 714 { 715 loff_t i_size = i_size_read(page_file_mapping(page)->host); 716 717 if (i_size > 0) { 718 pgoff_t index = page_index(page); 719 pgoff_t end_index = (i_size - 1) >> PAGE_SHIFT; 720 if (index < end_index) 721 return PAGE_SIZE; 722 if (index == end_index) 723 return ((i_size - 1) & ~PAGE_MASK) + 1; 724 } 725 return 0; 726 } 727 728 /* 729 * Convert a umode to a dirent->d_type 730 */ 731 static inline 732 unsigned char nfs_umode_to_dtype(umode_t mode) 733 { 734 return (mode >> 12) & 15; 735 } 736 737 /* 738 * Determine the number of pages in an array of length 'len' and 739 * with a base offset of 'base' 740 */ 741 static inline 742 unsigned int nfs_page_array_len(unsigned int base, size_t len) 743 { 744 return ((unsigned long)len + (unsigned long)base + 745 PAGE_SIZE - 1) >> PAGE_SHIFT; 746 } 747 748 /* 749 * Convert a struct timespec64 into a 64-bit change attribute 750 * 751 * This does approximately the same thing as timespec64_to_ns(), 752 * but for calculation efficiency, we multiply the seconds by 753 * 1024*1024*1024. 754 */ 755 static inline 756 u64 nfs_timespec_to_change_attr(const struct timespec64 *ts) 757 { 758 return ((u64)ts->tv_sec << 30) + ts->tv_nsec; 759 } 760 761 #ifdef CONFIG_CRC32 762 /** 763 * nfs_fhandle_hash - calculate the crc32 hash for the filehandle 764 * @fh - pointer to filehandle 765 * 766 * returns a crc32 hash for the filehandle that is compatible with 767 * the one displayed by "wireshark". 768 */ 769 static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh) 770 { 771 return ~crc32_le(0xFFFFFFFF, &fh->data[0], fh->size); 772 } 773 static inline u32 nfs_stateid_hash(const nfs4_stateid *stateid) 774 { 775 return ~crc32_le(0xFFFFFFFF, &stateid->other[0], 776 NFS4_STATEID_OTHER_SIZE); 777 } 778 #else 779 static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh) 780 { 781 return 0; 782 } 783 static inline u32 nfs_stateid_hash(nfs4_stateid *stateid) 784 { 785 return 0; 786 } 787 #endif 788 789 static inline bool nfs_error_is_fatal(int err) 790 { 791 switch (err) { 792 case -ERESTARTSYS: 793 case -EINTR: 794 case -EACCES: 795 case -EDQUOT: 796 case -EFBIG: 797 case -EIO: 798 case -ENOSPC: 799 case -EROFS: 800 case -ESTALE: 801 case -E2BIG: 802 case -ENOMEM: 803 case -ETIMEDOUT: 804 return true; 805 default: 806 return false; 807 } 808 } 809 810 static inline bool nfs_error_is_fatal_on_server(int err) 811 { 812 switch (err) { 813 case 0: 814 case -ERESTARTSYS: 815 case -EINTR: 816 return false; 817 } 818 return nfs_error_is_fatal(err); 819 } 820 821 /* 822 * Select between a default port value and a user-specified port value. 823 * If a zero value is set, then autobind will be used. 824 */ 825 static inline void nfs_set_port(struct sockaddr *sap, int *port, 826 const unsigned short default_port) 827 { 828 if (*port == NFS_UNSPEC_PORT) 829 *port = default_port; 830 831 rpc_set_port(sap, *port); 832 } 833