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_fsinfo(struct nfs_server *server, struct nfs_fh *, struct nfs_fattr *); 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 struct nfs_server *nfs4_create_server(struct fs_context *); 213 extern struct nfs_server *nfs4_create_referral_server(struct fs_context *); 214 extern int nfs4_update_server(struct nfs_server *server, const char *hostname, 215 struct sockaddr *sap, size_t salen, 216 struct net *net); 217 extern void nfs_free_server(struct nfs_server *server); 218 extern struct nfs_server *nfs_clone_server(struct nfs_server *, 219 struct nfs_fh *, 220 struct nfs_fattr *, 221 rpc_authflavor_t); 222 extern bool nfs_client_init_is_complete(const struct nfs_client *clp); 223 extern int nfs_client_init_status(const struct nfs_client *clp); 224 extern int nfs_wait_client_init_complete(const struct nfs_client *clp); 225 extern void nfs_mark_client_ready(struct nfs_client *clp, int state); 226 extern struct nfs_client *nfs4_set_ds_client(struct nfs_server *mds_srv, 227 const struct sockaddr *ds_addr, 228 int ds_addrlen, int ds_proto, 229 unsigned int ds_timeo, 230 unsigned int ds_retrans, 231 u32 minor_version); 232 extern struct rpc_clnt *nfs4_find_or_create_ds_client(struct nfs_client *, 233 struct inode *); 234 extern struct nfs_client *nfs3_set_ds_client(struct nfs_server *mds_srv, 235 const struct sockaddr *ds_addr, int ds_addrlen, 236 int ds_proto, unsigned int ds_timeo, 237 unsigned int ds_retrans); 238 #ifdef CONFIG_PROC_FS 239 extern int __init nfs_fs_proc_init(void); 240 extern void nfs_fs_proc_exit(void); 241 extern int nfs_fs_proc_net_init(struct net *net); 242 extern void nfs_fs_proc_net_exit(struct net *net); 243 #else 244 static inline int nfs_fs_proc_net_init(struct net *net) 245 { 246 return 0; 247 } 248 static inline void nfs_fs_proc_net_exit(struct net *net) 249 { 250 } 251 static inline int nfs_fs_proc_init(void) 252 { 253 return 0; 254 } 255 static inline void nfs_fs_proc_exit(void) 256 { 257 } 258 #endif 259 260 /* callback_xdr.c */ 261 extern const struct svc_version nfs4_callback_version1; 262 extern const struct svc_version nfs4_callback_version4; 263 264 /* fs_context.c */ 265 extern struct file_system_type nfs_fs_type; 266 267 /* pagelist.c */ 268 extern int __init nfs_init_nfspagecache(void); 269 extern void nfs_destroy_nfspagecache(void); 270 extern int __init nfs_init_readpagecache(void); 271 extern void nfs_destroy_readpagecache(void); 272 extern int __init nfs_init_writepagecache(void); 273 extern void nfs_destroy_writepagecache(void); 274 275 extern int __init nfs_init_directcache(void); 276 extern void nfs_destroy_directcache(void); 277 extern void nfs_pgheader_init(struct nfs_pageio_descriptor *desc, 278 struct nfs_pgio_header *hdr, 279 void (*release)(struct nfs_pgio_header *hdr)); 280 void nfs_set_pgio_error(struct nfs_pgio_header *hdr, int error, loff_t pos); 281 int nfs_iocounter_wait(struct nfs_lock_context *l_ctx); 282 283 extern const struct nfs_pageio_ops nfs_pgio_rw_ops; 284 struct nfs_pgio_header *nfs_pgio_header_alloc(const struct nfs_rw_ops *); 285 void nfs_pgio_header_free(struct nfs_pgio_header *); 286 int nfs_generic_pgio(struct nfs_pageio_descriptor *, struct nfs_pgio_header *); 287 int nfs_initiate_pgio(struct rpc_clnt *clnt, struct nfs_pgio_header *hdr, 288 const struct cred *cred, const struct nfs_rpc_ops *rpc_ops, 289 const struct rpc_call_ops *call_ops, int how, int flags); 290 void nfs_free_request(struct nfs_page *req); 291 struct nfs_pgio_mirror * 292 nfs_pgio_current_mirror(struct nfs_pageio_descriptor *desc); 293 294 static inline bool nfs_match_open_context(const struct nfs_open_context *ctx1, 295 const struct nfs_open_context *ctx2) 296 { 297 return cred_fscmp(ctx1->cred, ctx2->cred) == 0 && ctx1->state == ctx2->state; 298 } 299 300 /* nfs2xdr.c */ 301 extern const struct rpc_procinfo nfs_procedures[]; 302 extern int nfs2_decode_dirent(struct xdr_stream *, 303 struct nfs_entry *, bool); 304 305 /* nfs3xdr.c */ 306 extern const struct rpc_procinfo nfs3_procedures[]; 307 extern int nfs3_decode_dirent(struct xdr_stream *, 308 struct nfs_entry *, bool); 309 310 /* nfs4xdr.c */ 311 #if IS_ENABLED(CONFIG_NFS_V4) 312 extern int nfs4_decode_dirent(struct xdr_stream *, 313 struct nfs_entry *, bool); 314 #endif 315 #ifdef CONFIG_NFS_V4_1 316 extern const u32 nfs41_maxread_overhead; 317 extern const u32 nfs41_maxwrite_overhead; 318 extern const u32 nfs41_maxgetdevinfo_overhead; 319 #endif 320 321 /* nfs4proc.c */ 322 #if IS_ENABLED(CONFIG_NFS_V4) 323 extern const struct rpc_procinfo nfs4_procedures[]; 324 #endif 325 326 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 327 extern struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags); 328 static inline struct nfs4_label * 329 nfs4_label_copy(struct nfs4_label *dst, struct nfs4_label *src) 330 { 331 if (!dst || !src) 332 return NULL; 333 334 if (src->len > NFS4_MAXLABELLEN) 335 return NULL; 336 337 dst->lfs = src->lfs; 338 dst->pi = src->pi; 339 dst->len = src->len; 340 memcpy(dst->label, src->label, src->len); 341 342 return dst; 343 } 344 static inline void nfs4_label_free(struct nfs4_label *label) 345 { 346 if (label) { 347 kfree(label->label); 348 kfree(label); 349 } 350 return; 351 } 352 353 static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi) 354 { 355 if (nfs_server_capable(&nfsi->vfs_inode, NFS_CAP_SECURITY_LABEL)) 356 nfsi->cache_validity |= NFS_INO_INVALID_LABEL; 357 } 358 #else 359 static inline struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags) { return NULL; } 360 static inline void nfs4_label_free(void *label) {} 361 static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi) 362 { 363 } 364 static inline struct nfs4_label * 365 nfs4_label_copy(struct nfs4_label *dst, struct nfs4_label *src) 366 { 367 return NULL; 368 } 369 #endif /* CONFIG_NFS_V4_SECURITY_LABEL */ 370 371 /* proc.c */ 372 void nfs_close_context(struct nfs_open_context *ctx, int is_sync); 373 extern struct nfs_client *nfs_init_client(struct nfs_client *clp, 374 const struct nfs_client_initdata *); 375 376 /* dir.c */ 377 extern void nfs_advise_use_readdirplus(struct inode *dir); 378 extern void nfs_force_use_readdirplus(struct inode *dir); 379 extern unsigned long nfs_access_cache_count(struct shrinker *shrink, 380 struct shrink_control *sc); 381 extern unsigned long nfs_access_cache_scan(struct shrinker *shrink, 382 struct shrink_control *sc); 383 struct dentry *nfs_lookup(struct inode *, struct dentry *, unsigned int); 384 int nfs_create(struct user_namespace *, struct inode *, struct dentry *, 385 umode_t, bool); 386 int nfs_mkdir(struct user_namespace *, struct inode *, struct dentry *, 387 umode_t); 388 int nfs_rmdir(struct inode *, struct dentry *); 389 int nfs_unlink(struct inode *, struct dentry *); 390 int nfs_symlink(struct user_namespace *, struct inode *, struct dentry *, 391 const char *); 392 int nfs_link(struct dentry *, struct inode *, struct dentry *); 393 int nfs_mknod(struct user_namespace *, struct inode *, struct dentry *, umode_t, 394 dev_t); 395 int nfs_rename(struct user_namespace *, struct inode *, struct dentry *, 396 struct inode *, struct dentry *, unsigned int); 397 398 /* file.c */ 399 int nfs_file_fsync(struct file *file, loff_t start, loff_t end, int datasync); 400 loff_t nfs_file_llseek(struct file *, loff_t, int); 401 ssize_t nfs_file_read(struct kiocb *, struct iov_iter *); 402 int nfs_file_mmap(struct file *, struct vm_area_struct *); 403 ssize_t nfs_file_write(struct kiocb *, struct iov_iter *); 404 int nfs_file_release(struct inode *, struct file *); 405 int nfs_lock(struct file *, int, struct file_lock *); 406 int nfs_flock(struct file *, int, struct file_lock *); 407 int nfs_check_flags(int); 408 409 /* inode.c */ 410 extern struct workqueue_struct *nfsiod_workqueue; 411 extern struct inode *nfs_alloc_inode(struct super_block *sb); 412 extern void nfs_free_inode(struct inode *); 413 extern int nfs_write_inode(struct inode *, struct writeback_control *); 414 extern int nfs_drop_inode(struct inode *); 415 extern void nfs_clear_inode(struct inode *); 416 extern void nfs_evict_inode(struct inode *); 417 extern void nfs_zap_acl_cache(struct inode *inode); 418 extern void nfs_set_cache_invalid(struct inode *inode, unsigned long flags); 419 extern bool nfs_check_cache_invalid(struct inode *, unsigned long); 420 extern int nfs_wait_bit_killable(struct wait_bit_key *key, int mode); 421 extern int nfs_wait_atomic_killable(atomic_t *p, unsigned int mode); 422 423 /* super.c */ 424 extern const struct super_operations nfs_sops; 425 bool nfs_auth_info_match(const struct nfs_auth_info *, rpc_authflavor_t); 426 int nfs_try_get_tree(struct fs_context *); 427 int nfs_get_tree_common(struct fs_context *); 428 void nfs_kill_super(struct super_block *); 429 430 extern struct rpc_stat nfs_rpcstat; 431 432 extern int __init register_nfs_fs(void); 433 extern void __exit unregister_nfs_fs(void); 434 extern bool nfs_sb_active(struct super_block *sb); 435 extern void nfs_sb_deactive(struct super_block *sb); 436 extern int nfs_client_for_each_server(struct nfs_client *clp, 437 int (*fn)(struct nfs_server *, void *), 438 void *data); 439 /* io.c */ 440 extern void nfs_start_io_read(struct inode *inode); 441 extern void nfs_end_io_read(struct inode *inode); 442 extern void nfs_start_io_write(struct inode *inode); 443 extern void nfs_end_io_write(struct inode *inode); 444 extern void nfs_start_io_direct(struct inode *inode); 445 extern void nfs_end_io_direct(struct inode *inode); 446 447 static inline bool nfs_file_io_is_buffered(struct nfs_inode *nfsi) 448 { 449 return test_bit(NFS_INO_ODIRECT, &nfsi->flags) == 0; 450 } 451 452 /* namespace.c */ 453 #define NFS_PATH_CANONICAL 1 454 extern char *nfs_path(char **p, struct dentry *dentry, 455 char *buffer, ssize_t buflen, unsigned flags); 456 extern struct vfsmount *nfs_d_automount(struct path *path); 457 int nfs_submount(struct fs_context *, struct nfs_server *); 458 int nfs_do_submount(struct fs_context *); 459 460 /* getroot.c */ 461 extern int nfs_get_root(struct super_block *s, struct fs_context *fc); 462 #if IS_ENABLED(CONFIG_NFS_V4) 463 extern int nfs4_get_rootfh(struct nfs_server *server, struct nfs_fh *mntfh, bool); 464 #endif 465 466 struct nfs_pgio_completion_ops; 467 /* read.c */ 468 extern void nfs_pageio_init_read(struct nfs_pageio_descriptor *pgio, 469 struct inode *inode, bool force_mds, 470 const struct nfs_pgio_completion_ops *compl_ops); 471 extern void nfs_read_prepare(struct rpc_task *task, void *calldata); 472 extern void nfs_pageio_reset_read_mds(struct nfs_pageio_descriptor *pgio); 473 474 /* super.c */ 475 void nfs_umount_begin(struct super_block *); 476 int nfs_statfs(struct dentry *, struct kstatfs *); 477 int nfs_show_options(struct seq_file *, struct dentry *); 478 int nfs_show_devname(struct seq_file *, struct dentry *); 479 int nfs_show_path(struct seq_file *, struct dentry *); 480 int nfs_show_stats(struct seq_file *, struct dentry *); 481 int nfs_reconfigure(struct fs_context *); 482 483 /* write.c */ 484 extern void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio, 485 struct inode *inode, int ioflags, bool force_mds, 486 const struct nfs_pgio_completion_ops *compl_ops); 487 extern void nfs_pageio_reset_write_mds(struct nfs_pageio_descriptor *pgio); 488 extern void nfs_commit_free(struct nfs_commit_data *p); 489 extern void nfs_write_prepare(struct rpc_task *task, void *calldata); 490 extern void nfs_commit_prepare(struct rpc_task *task, void *calldata); 491 extern int nfs_initiate_commit(struct rpc_clnt *clnt, 492 struct nfs_commit_data *data, 493 const struct nfs_rpc_ops *nfs_ops, 494 const struct rpc_call_ops *call_ops, 495 int how, int flags); 496 extern void nfs_init_commit(struct nfs_commit_data *data, 497 struct list_head *head, 498 struct pnfs_layout_segment *lseg, 499 struct nfs_commit_info *cinfo); 500 int nfs_scan_commit_list(struct list_head *src, struct list_head *dst, 501 struct nfs_commit_info *cinfo, int max); 502 unsigned long nfs_reqs_to_commit(struct nfs_commit_info *); 503 int nfs_scan_commit(struct inode *inode, struct list_head *dst, 504 struct nfs_commit_info *cinfo); 505 void nfs_mark_request_commit(struct nfs_page *req, 506 struct pnfs_layout_segment *lseg, 507 struct nfs_commit_info *cinfo, 508 u32 ds_commit_idx); 509 int nfs_write_need_commit(struct nfs_pgio_header *); 510 void nfs_writeback_update_inode(struct nfs_pgio_header *hdr); 511 int nfs_generic_commit_list(struct inode *inode, struct list_head *head, 512 int how, struct nfs_commit_info *cinfo); 513 void nfs_retry_commit(struct list_head *page_list, 514 struct pnfs_layout_segment *lseg, 515 struct nfs_commit_info *cinfo, 516 u32 ds_commit_idx); 517 void nfs_commitdata_release(struct nfs_commit_data *data); 518 void nfs_request_add_commit_list(struct nfs_page *req, 519 struct nfs_commit_info *cinfo); 520 void nfs_request_add_commit_list_locked(struct nfs_page *req, 521 struct list_head *dst, 522 struct nfs_commit_info *cinfo); 523 void nfs_request_remove_commit_list(struct nfs_page *req, 524 struct nfs_commit_info *cinfo); 525 void nfs_init_cinfo(struct nfs_commit_info *cinfo, 526 struct inode *inode, 527 struct nfs_direct_req *dreq); 528 int nfs_key_timeout_notify(struct file *filp, struct inode *inode); 529 bool nfs_ctx_key_to_expire(struct nfs_open_context *ctx, struct inode *inode); 530 void nfs_pageio_stop_mirroring(struct nfs_pageio_descriptor *pgio); 531 532 int nfs_filemap_write_and_wait_range(struct address_space *mapping, 533 loff_t lstart, loff_t lend); 534 535 #ifdef CONFIG_NFS_V4_1 536 static inline void 537 pnfs_bucket_clear_pnfs_ds_commit_verifiers(struct pnfs_commit_bucket *buckets, 538 unsigned int nbuckets) 539 { 540 unsigned int i; 541 542 for (i = 0; i < nbuckets; i++) 543 buckets[i].direct_verf.committed = NFS_INVALID_STABLE_HOW; 544 } 545 static inline 546 void nfs_clear_pnfs_ds_commit_verifiers(struct pnfs_ds_commit_info *cinfo) 547 { 548 struct pnfs_commit_array *array; 549 550 rcu_read_lock(); 551 list_for_each_entry_rcu(array, &cinfo->commits, cinfo_list) 552 pnfs_bucket_clear_pnfs_ds_commit_verifiers(array->buckets, 553 array->nbuckets); 554 rcu_read_unlock(); 555 } 556 #else 557 static inline 558 void nfs_clear_pnfs_ds_commit_verifiers(struct pnfs_ds_commit_info *cinfo) 559 { 560 } 561 #endif 562 563 #ifdef CONFIG_MIGRATION 564 extern int nfs_migrate_page(struct address_space *, 565 struct page *, struct page *, enum migrate_mode); 566 #endif 567 568 static inline int 569 nfs_write_verifier_cmp(const struct nfs_write_verifier *v1, 570 const struct nfs_write_verifier *v2) 571 { 572 return memcmp(v1->data, v2->data, sizeof(v1->data)); 573 } 574 575 static inline bool 576 nfs_write_match_verf(const struct nfs_writeverf *verf, 577 struct nfs_page *req) 578 { 579 return verf->committed > NFS_UNSTABLE && 580 !nfs_write_verifier_cmp(&req->wb_verf, &verf->verifier); 581 } 582 583 /* unlink.c */ 584 extern struct rpc_task * 585 nfs_async_rename(struct inode *old_dir, struct inode *new_dir, 586 struct dentry *old_dentry, struct dentry *new_dentry, 587 void (*complete)(struct rpc_task *, struct nfs_renamedata *)); 588 extern int nfs_sillyrename(struct inode *dir, struct dentry *dentry); 589 590 /* direct.c */ 591 void nfs_init_cinfo_from_dreq(struct nfs_commit_info *cinfo, 592 struct nfs_direct_req *dreq); 593 extern ssize_t nfs_dreq_bytes_left(struct nfs_direct_req *dreq); 594 595 /* nfs4proc.c */ 596 extern struct nfs_client *nfs4_init_client(struct nfs_client *clp, 597 const struct nfs_client_initdata *); 598 extern int nfs40_walk_client_list(struct nfs_client *clp, 599 struct nfs_client **result, 600 const struct cred *cred); 601 extern int nfs41_walk_client_list(struct nfs_client *clp, 602 struct nfs_client **result, 603 const struct cred *cred); 604 extern void nfs4_test_session_trunk(struct rpc_clnt *clnt, 605 struct rpc_xprt *xprt, 606 void *data); 607 608 static inline struct inode *nfs_igrab_and_active(struct inode *inode) 609 { 610 struct super_block *sb = inode->i_sb; 611 612 if (sb && nfs_sb_active(sb)) { 613 if (igrab(inode)) 614 return inode; 615 nfs_sb_deactive(sb); 616 } 617 return NULL; 618 } 619 620 static inline void nfs_iput_and_deactive(struct inode *inode) 621 { 622 if (inode != NULL) { 623 struct super_block *sb = inode->i_sb; 624 625 iput(inode); 626 nfs_sb_deactive(sb); 627 } 628 } 629 630 /* 631 * Determine the device name as a string 632 */ 633 static inline char *nfs_devname(struct dentry *dentry, 634 char *buffer, ssize_t buflen) 635 { 636 char *dummy; 637 return nfs_path(&dummy, dentry, buffer, buflen, NFS_PATH_CANONICAL); 638 } 639 640 /* 641 * Determine the actual block size (and log2 thereof) 642 */ 643 static inline 644 unsigned long nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp) 645 { 646 /* make sure blocksize is a power of two */ 647 if ((bsize & (bsize - 1)) || nrbitsp) { 648 unsigned char nrbits; 649 650 for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--) 651 ; 652 bsize = 1 << nrbits; 653 if (nrbitsp) 654 *nrbitsp = nrbits; 655 } 656 657 return bsize; 658 } 659 660 /* 661 * Calculate the number of 512byte blocks used. 662 */ 663 static inline blkcnt_t nfs_calc_block_size(u64 tsize) 664 { 665 blkcnt_t used = (tsize + 511) >> 9; 666 return (used > ULONG_MAX) ? ULONG_MAX : used; 667 } 668 669 /* 670 * Compute and set NFS server blocksize 671 */ 672 static inline 673 unsigned long nfs_block_size(unsigned long bsize, unsigned char *nrbitsp) 674 { 675 if (bsize < NFS_MIN_FILE_IO_SIZE) 676 bsize = NFS_DEF_FILE_IO_SIZE; 677 else if (bsize >= NFS_MAX_FILE_IO_SIZE) 678 bsize = NFS_MAX_FILE_IO_SIZE; 679 680 return nfs_block_bits(bsize, nrbitsp); 681 } 682 683 /* 684 * Determine the maximum file size for a superblock 685 */ 686 static inline 687 void nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize) 688 { 689 sb->s_maxbytes = (loff_t)maxfilesize; 690 if (sb->s_maxbytes > MAX_LFS_FILESIZE || sb->s_maxbytes <= 0) 691 sb->s_maxbytes = MAX_LFS_FILESIZE; 692 } 693 694 /* 695 * Record the page as unstable (an extra writeback period) and mark its 696 * inode as dirty. 697 */ 698 static inline 699 void nfs_mark_page_unstable(struct page *page, struct nfs_commit_info *cinfo) 700 { 701 if (!cinfo->dreq) { 702 struct inode *inode = page_file_mapping(page)->host; 703 704 /* This page is really still in write-back - just that the 705 * writeback is happening on the server now. 706 */ 707 inc_node_page_state(page, NR_WRITEBACK); 708 inc_wb_stat(&inode_to_bdi(inode)->wb, WB_WRITEBACK); 709 __mark_inode_dirty(inode, I_DIRTY_DATASYNC); 710 } 711 } 712 713 /* 714 * Determine the number of bytes of data the page contains 715 */ 716 static inline 717 unsigned int nfs_page_length(struct page *page) 718 { 719 loff_t i_size = i_size_read(page_file_mapping(page)->host); 720 721 if (i_size > 0) { 722 pgoff_t index = page_index(page); 723 pgoff_t end_index = (i_size - 1) >> PAGE_SHIFT; 724 if (index < end_index) 725 return PAGE_SIZE; 726 if (index == end_index) 727 return ((i_size - 1) & ~PAGE_MASK) + 1; 728 } 729 return 0; 730 } 731 732 /* 733 * Convert a umode to a dirent->d_type 734 */ 735 static inline 736 unsigned char nfs_umode_to_dtype(umode_t mode) 737 { 738 return (mode >> 12) & 15; 739 } 740 741 /* 742 * Determine the number of pages in an array of length 'len' and 743 * with a base offset of 'base' 744 */ 745 static inline 746 unsigned int nfs_page_array_len(unsigned int base, size_t len) 747 { 748 return ((unsigned long)len + (unsigned long)base + 749 PAGE_SIZE - 1) >> PAGE_SHIFT; 750 } 751 752 /* 753 * Convert a struct timespec64 into a 64-bit change attribute 754 * 755 * This does approximately the same thing as timespec64_to_ns(), 756 * but for calculation efficiency, we multiply the seconds by 757 * 1024*1024*1024. 758 */ 759 static inline 760 u64 nfs_timespec_to_change_attr(const struct timespec64 *ts) 761 { 762 return ((u64)ts->tv_sec << 30) + ts->tv_nsec; 763 } 764 765 #ifdef CONFIG_CRC32 766 /** 767 * nfs_fhandle_hash - calculate the crc32 hash for the filehandle 768 * @fh - pointer to filehandle 769 * 770 * returns a crc32 hash for the filehandle that is compatible with 771 * the one displayed by "wireshark". 772 */ 773 static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh) 774 { 775 return ~crc32_le(0xFFFFFFFF, &fh->data[0], fh->size); 776 } 777 static inline u32 nfs_stateid_hash(const nfs4_stateid *stateid) 778 { 779 return ~crc32_le(0xFFFFFFFF, &stateid->other[0], 780 NFS4_STATEID_OTHER_SIZE); 781 } 782 #else 783 static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh) 784 { 785 return 0; 786 } 787 static inline u32 nfs_stateid_hash(nfs4_stateid *stateid) 788 { 789 return 0; 790 } 791 #endif 792 793 static inline bool nfs_error_is_fatal(int err) 794 { 795 switch (err) { 796 case -ERESTARTSYS: 797 case -EINTR: 798 case -EACCES: 799 case -EDQUOT: 800 case -EFBIG: 801 case -EIO: 802 case -ENOSPC: 803 case -EROFS: 804 case -ESTALE: 805 case -E2BIG: 806 case -ENOMEM: 807 case -ETIMEDOUT: 808 return true; 809 default: 810 return false; 811 } 812 } 813 814 static inline bool nfs_error_is_fatal_on_server(int err) 815 { 816 switch (err) { 817 case 0: 818 case -ERESTARTSYS: 819 case -EINTR: 820 return false; 821 } 822 return nfs_error_is_fatal(err); 823 } 824 825 /* 826 * Select between a default port value and a user-specified port value. 827 * If a zero value is set, then autobind will be used. 828 */ 829 static inline void nfs_set_port(struct sockaddr *sap, int *port, 830 const unsigned short default_port) 831 { 832 if (*port == NFS_UNSPEC_PORT) 833 *port = default_port; 834 835 rpc_set_port(sap, *port); 836 } 837