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 16extern const struct export_operations nfs_export_ops; 17 18struct nfs_string; 19struct nfs_pageio_descriptor; 20 21static 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 27static 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 36static 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 45static inline fmode_t flags_to_mode(int flags) 46{ 47 fmode_t res = (__force fmode_t)flags & FMODE_EXEC; 48 if ((flags & O_ACCMODE) != O_WRONLY) 49 res |= FMODE_READ; 50 if ((flags & O_ACCMODE) != O_RDONLY) 51 res |= FMODE_WRITE; 52 return res; 53} 54 55/* 56 * Note: RFC 1813 doesn't limit the number of auth flavors that 57 * a server can return, so make something up. 58 */ 59#define NFS_MAX_SECFLAVORS (12) 60 61/* 62 * Value used if the user did not specify a port value. 63 */ 64#define NFS_UNSPEC_PORT (-1) 65 66#define NFS_UNSPEC_RETRANS (UINT_MAX) 67#define NFS_UNSPEC_TIMEO (UINT_MAX) 68 69/* 70 * Maximum number of pages that readdir can use for creating 71 * a vmapped array of pages. 72 */ 73#define NFS_MAX_READDIR_PAGES 8 74 75struct nfs_client_initdata { 76 unsigned long init_flags; 77 const char *hostname; /* Hostname of the server */ 78 const struct sockaddr *addr; /* Address of the server */ 79 const char *nodename; /* Hostname of the client */ 80 const char *ip_addr; /* IP address of the client */ 81 size_t addrlen; 82 struct nfs_subversion *nfs_mod; 83 int proto; 84 u32 minorversion; 85 unsigned int nconnect; 86 struct net *net; 87 const struct rpc_timeout *timeparms; 88 const struct cred *cred; 89}; 90 91/* 92 * In-kernel mount arguments 93 */ 94struct nfs_fs_context { 95 bool internal; 96 bool skip_reconfig_option_check; 97 bool need_mount; 98 bool sloppy; 99 unsigned int flags; /* NFS{,4}_MOUNT_* flags */ 100 unsigned int rsize, wsize; 101 unsigned int timeo, retrans; 102 unsigned int acregmin, acregmax; 103 unsigned int acdirmin, acdirmax; 104 unsigned int namlen; 105 unsigned int options; 106 unsigned int bsize; 107 struct nfs_auth_info auth_info; 108 rpc_authflavor_t selected_flavor; 109 char *client_address; 110 unsigned int version; 111 unsigned int minorversion; 112 char *fscache_uniq; 113 unsigned short protofamily; 114 unsigned short mountfamily; 115 116 struct { 117 union { 118 struct sockaddr address; 119 struct sockaddr_storage _address; 120 }; 121 size_t addrlen; 122 char *hostname; 123 u32 version; 124 int port; 125 unsigned short protocol; 126 } mount_server; 127 128 struct { 129 union { 130 struct sockaddr address; 131 struct sockaddr_storage _address; 132 }; 133 size_t addrlen; 134 char *hostname; 135 char *export_path; 136 int port; 137 unsigned short protocol; 138 unsigned short nconnect; 139 unsigned short export_path_len; 140 } nfs_server; 141 142 struct nfs_fh *mntfh; 143 struct nfs_server *server; 144 struct nfs_subversion *nfs_mod; 145 146 /* Information for a cloned mount. */ 147 struct nfs_clone_mount { 148 struct super_block *sb; 149 struct dentry *dentry; 150 struct nfs_fattr *fattr; 151 unsigned int inherited_bsize; 152 } clone_data; 153}; 154 155#define nfs_errorf(fc, fmt, ...) ((fc)->log.log ? \ 156 errorf(fc, fmt, ## __VA_ARGS__) : \ 157 ({ dprintk(fmt "\n", ## __VA_ARGS__); })) 158 159#define nfs_ferrorf(fc, fac, fmt, ...) ((fc)->log.log ? \ 160 errorf(fc, fmt, ## __VA_ARGS__) : \ 161 ({ dfprintk(fac, fmt "\n", ## __VA_ARGS__); })) 162 163#define nfs_invalf(fc, fmt, ...) ((fc)->log.log ? \ 164 invalf(fc, fmt, ## __VA_ARGS__) : \ 165 ({ dprintk(fmt "\n", ## __VA_ARGS__); -EINVAL; })) 166 167#define nfs_finvalf(fc, fac, fmt, ...) ((fc)->log.log ? \ 168 invalf(fc, fmt, ## __VA_ARGS__) : \ 169 ({ dfprintk(fac, fmt "\n", ## __VA_ARGS__); -EINVAL; })) 170 171#define nfs_warnf(fc, fmt, ...) ((fc)->log.log ? \ 172 warnf(fc, fmt, ## __VA_ARGS__) : \ 173 ({ dprintk(fmt "\n", ## __VA_ARGS__); })) 174 175#define nfs_fwarnf(fc, fac, fmt, ...) ((fc)->log.log ? \ 176 warnf(fc, fmt, ## __VA_ARGS__) : \ 177 ({ dfprintk(fac, fmt "\n", ## __VA_ARGS__); })) 178 179static inline struct nfs_fs_context *nfs_fc2context(const struct fs_context *fc) 180{ 181 return fc->fs_private; 182} 183 184/* mount_clnt.c */ 185struct nfs_mount_request { 186 struct sockaddr *sap; 187 size_t salen; 188 char *hostname; 189 char *dirpath; 190 u32 version; 191 unsigned short protocol; 192 struct nfs_fh *fh; 193 int noresvport; 194 unsigned int *auth_flav_len; 195 rpc_authflavor_t *auth_flavs; 196 struct net *net; 197}; 198 199extern int nfs_mount(struct nfs_mount_request *info); 200extern void nfs_umount(const struct nfs_mount_request *info); 201 202/* client.c */ 203extern const struct rpc_program nfs_program; 204extern void nfs_clients_init(struct net *net); 205extern void nfs_clients_exit(struct net *net); 206extern struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *); 207int nfs_create_rpc_client(struct nfs_client *, const struct nfs_client_initdata *, rpc_authflavor_t); 208struct nfs_client *nfs_get_client(const struct nfs_client_initdata *); 209int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *, struct nfs_fattr *); 210void nfs_server_insert_lists(struct nfs_server *); 211void nfs_server_remove_lists(struct nfs_server *); 212void nfs_init_timeout_values(struct rpc_timeout *to, int proto, int timeo, int retrans); 213int nfs_init_server_rpcclient(struct nfs_server *, const struct rpc_timeout *t, 214 rpc_authflavor_t); 215struct nfs_server *nfs_alloc_server(void); 216void nfs_server_copy_userdata(struct nfs_server *, struct nfs_server *); 217 218extern void nfs_put_client(struct nfs_client *); 219extern void nfs_free_client(struct nfs_client *); 220extern struct nfs_client *nfs4_find_client_ident(struct net *, int); 221extern struct nfs_client * 222nfs4_find_client_sessionid(struct net *, const struct sockaddr *, 223 struct nfs4_sessionid *, u32); 224extern struct nfs_server *nfs_create_server(struct fs_context *); 225extern struct nfs_server *nfs4_create_server(struct fs_context *); 226extern struct nfs_server *nfs4_create_referral_server(struct fs_context *); 227extern int nfs4_update_server(struct nfs_server *server, const char *hostname, 228 struct sockaddr *sap, size_t salen, 229 struct net *net); 230extern void nfs_free_server(struct nfs_server *server); 231extern struct nfs_server *nfs_clone_server(struct nfs_server *, 232 struct nfs_fh *, 233 struct nfs_fattr *, 234 rpc_authflavor_t); 235extern bool nfs_client_init_is_complete(const struct nfs_client *clp); 236extern int nfs_client_init_status(const struct nfs_client *clp); 237extern int nfs_wait_client_init_complete(const struct nfs_client *clp); 238extern void nfs_mark_client_ready(struct nfs_client *clp, int state); 239extern struct nfs_client *nfs4_set_ds_client(struct nfs_server *mds_srv, 240 const struct sockaddr *ds_addr, 241 int ds_addrlen, int ds_proto, 242 unsigned int ds_timeo, 243 unsigned int ds_retrans, 244 u32 minor_version); 245extern struct rpc_clnt *nfs4_find_or_create_ds_client(struct nfs_client *, 246 struct inode *); 247extern struct nfs_client *nfs3_set_ds_client(struct nfs_server *mds_srv, 248 const struct sockaddr *ds_addr, int ds_addrlen, 249 int ds_proto, unsigned int ds_timeo, 250 unsigned int ds_retrans); 251#ifdef CONFIG_PROC_FS 252extern int __init nfs_fs_proc_init(void); 253extern void nfs_fs_proc_exit(void); 254extern int nfs_fs_proc_net_init(struct net *net); 255extern void nfs_fs_proc_net_exit(struct net *net); 256#else 257static inline int nfs_fs_proc_net_init(struct net *net) 258{ 259 return 0; 260} 261static inline void nfs_fs_proc_net_exit(struct net *net) 262{ 263} 264static inline int nfs_fs_proc_init(void) 265{ 266 return 0; 267} 268static inline void nfs_fs_proc_exit(void) 269{ 270} 271#endif 272 273/* callback_xdr.c */ 274extern const struct svc_version nfs4_callback_version1; 275extern const struct svc_version nfs4_callback_version4; 276 277/* fs_context.c */ 278extern struct file_system_type nfs_fs_type; 279 280/* pagelist.c */ 281extern int __init nfs_init_nfspagecache(void); 282extern void nfs_destroy_nfspagecache(void); 283extern int __init nfs_init_readpagecache(void); 284extern void nfs_destroy_readpagecache(void); 285extern int __init nfs_init_writepagecache(void); 286extern void nfs_destroy_writepagecache(void); 287 288extern int __init nfs_init_directcache(void); 289extern void nfs_destroy_directcache(void); 290extern void nfs_pgheader_init(struct nfs_pageio_descriptor *desc, 291 struct nfs_pgio_header *hdr, 292 void (*release)(struct nfs_pgio_header *hdr)); 293void nfs_set_pgio_error(struct nfs_pgio_header *hdr, int error, loff_t pos); 294int nfs_iocounter_wait(struct nfs_lock_context *l_ctx); 295 296extern const struct nfs_pageio_ops nfs_pgio_rw_ops; 297struct nfs_pgio_header *nfs_pgio_header_alloc(const struct nfs_rw_ops *); 298void nfs_pgio_header_free(struct nfs_pgio_header *); 299int nfs_generic_pgio(struct nfs_pageio_descriptor *, struct nfs_pgio_header *); 300int nfs_initiate_pgio(struct rpc_clnt *clnt, struct nfs_pgio_header *hdr, 301 const struct cred *cred, const struct nfs_rpc_ops *rpc_ops, 302 const struct rpc_call_ops *call_ops, int how, int flags); 303void nfs_free_request(struct nfs_page *req); 304struct nfs_pgio_mirror * 305nfs_pgio_current_mirror(struct nfs_pageio_descriptor *desc); 306 307static inline bool nfs_match_open_context(const struct nfs_open_context *ctx1, 308 const struct nfs_open_context *ctx2) 309{ 310 return cred_fscmp(ctx1->cred, ctx2->cred) == 0 && ctx1->state == ctx2->state; 311} 312 313/* nfs2xdr.c */ 314extern const struct rpc_procinfo nfs_procedures[]; 315extern int nfs2_decode_dirent(struct xdr_stream *, 316 struct nfs_entry *, bool); 317 318/* nfs3xdr.c */ 319extern const struct rpc_procinfo nfs3_procedures[]; 320extern int nfs3_decode_dirent(struct xdr_stream *, 321 struct nfs_entry *, bool); 322 323/* nfs4xdr.c */ 324#if IS_ENABLED(CONFIG_NFS_V4) 325extern int nfs4_decode_dirent(struct xdr_stream *, 326 struct nfs_entry *, bool); 327#endif 328#ifdef CONFIG_NFS_V4_1 329extern const u32 nfs41_maxread_overhead; 330extern const u32 nfs41_maxwrite_overhead; 331extern const u32 nfs41_maxgetdevinfo_overhead; 332#endif 333 334/* nfs4proc.c */ 335#if IS_ENABLED(CONFIG_NFS_V4) 336extern const struct rpc_procinfo nfs4_procedures[]; 337#endif 338 339#ifdef CONFIG_NFS_V4_SECURITY_LABEL 340extern struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags); 341static inline struct nfs4_label * 342nfs4_label_copy(struct nfs4_label *dst, struct nfs4_label *src) 343{ 344 if (!dst || !src) 345 return NULL; 346 347 if (src->len > NFS4_MAXLABELLEN) 348 return NULL; 349 350 dst->lfs = src->lfs; 351 dst->pi = src->pi; 352 dst->len = src->len; 353 memcpy(dst->label, src->label, src->len); 354 355 return dst; 356} 357static inline void nfs4_label_free(struct nfs4_label *label) 358{ 359 if (label) { 360 kfree(label->label); 361 kfree(label); 362 } 363 return; 364} 365 366static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi) 367{ 368 if (nfs_server_capable(&nfsi->vfs_inode, NFS_CAP_SECURITY_LABEL)) 369 nfsi->cache_validity |= NFS_INO_INVALID_LABEL; 370} 371#else 372static inline struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags) { return NULL; } 373static inline void nfs4_label_free(void *label) {} 374static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi) 375{ 376} 377static inline struct nfs4_label * 378nfs4_label_copy(struct nfs4_label *dst, struct nfs4_label *src) 379{ 380 return NULL; 381} 382#endif /* CONFIG_NFS_V4_SECURITY_LABEL */ 383 384/* proc.c */ 385void nfs_close_context(struct nfs_open_context *ctx, int is_sync); 386extern struct nfs_client *nfs_init_client(struct nfs_client *clp, 387 const struct nfs_client_initdata *); 388 389/* dir.c */ 390extern void nfs_advise_use_readdirplus(struct inode *dir); 391extern void nfs_force_use_readdirplus(struct inode *dir); 392extern unsigned long nfs_access_cache_count(struct shrinker *shrink, 393 struct shrink_control *sc); 394extern unsigned long nfs_access_cache_scan(struct shrinker *shrink, 395 struct shrink_control *sc); 396struct dentry *nfs_lookup(struct inode *, struct dentry *, unsigned int); 397int nfs_create(struct inode *, struct dentry *, umode_t, bool); 398int nfs_mkdir(struct inode *, struct dentry *, umode_t); 399int nfs_rmdir(struct inode *, struct dentry *); 400int nfs_unlink(struct inode *, struct dentry *); 401int nfs_symlink(struct inode *, struct dentry *, const char *); 402int nfs_link(struct dentry *, struct inode *, struct dentry *); 403int nfs_mknod(struct inode *, struct dentry *, umode_t, dev_t); 404int nfs_rename(struct inode *, struct dentry *, 405 struct inode *, struct dentry *, unsigned int); 406 407/* file.c */ 408int nfs_file_fsync(struct file *file, loff_t start, loff_t end, int datasync); 409loff_t nfs_file_llseek(struct file *, loff_t, int); 410ssize_t nfs_file_read(struct kiocb *, struct iov_iter *); 411int nfs_file_mmap(struct file *, struct vm_area_struct *); 412ssize_t nfs_file_write(struct kiocb *, struct iov_iter *); 413int nfs_file_release(struct inode *, struct file *); 414int nfs_lock(struct file *, int, struct file_lock *); 415int nfs_flock(struct file *, int, struct file_lock *); 416int nfs_check_flags(int); 417 418/* inode.c */ 419extern struct workqueue_struct *nfsiod_workqueue; 420extern struct inode *nfs_alloc_inode(struct super_block *sb); 421extern void nfs_free_inode(struct inode *); 422extern int nfs_write_inode(struct inode *, struct writeback_control *); 423extern int nfs_drop_inode(struct inode *); 424extern void nfs_clear_inode(struct inode *); 425extern void nfs_evict_inode(struct inode *); 426void nfs_zap_acl_cache(struct inode *inode); 427extern bool nfs_check_cache_invalid(struct inode *, unsigned long); 428extern int nfs_wait_bit_killable(struct wait_bit_key *key, int mode); 429extern int nfs_wait_atomic_killable(atomic_t *p, unsigned int mode); 430 431/* super.c */ 432extern const struct super_operations nfs_sops; 433bool nfs_auth_info_match(const struct nfs_auth_info *, rpc_authflavor_t); 434int nfs_try_get_tree(struct fs_context *); 435int nfs_get_tree_common(struct fs_context *); 436void nfs_kill_super(struct super_block *); 437 438extern int __init register_nfs_fs(void); 439extern void __exit unregister_nfs_fs(void); 440extern bool nfs_sb_active(struct super_block *sb); 441extern void nfs_sb_deactive(struct super_block *sb); 442extern int nfs_client_for_each_server(struct nfs_client *clp, 443 int (*fn)(struct nfs_server *, void *), 444 void *data); 445/* io.c */ 446extern void nfs_start_io_read(struct inode *inode); 447extern void nfs_end_io_read(struct inode *inode); 448extern void nfs_start_io_write(struct inode *inode); 449extern void nfs_end_io_write(struct inode *inode); 450extern void nfs_start_io_direct(struct inode *inode); 451extern void nfs_end_io_direct(struct inode *inode); 452 453static inline bool nfs_file_io_is_buffered(struct nfs_inode *nfsi) 454{ 455 return test_bit(NFS_INO_ODIRECT, &nfsi->flags) == 0; 456} 457 458/* namespace.c */ 459#define NFS_PATH_CANONICAL 1 460extern char *nfs_path(char **p, struct dentry *dentry, 461 char *buffer, ssize_t buflen, unsigned flags); 462extern struct vfsmount *nfs_d_automount(struct path *path); 463int nfs_submount(struct fs_context *, struct nfs_server *); 464int nfs_do_submount(struct fs_context *); 465 466/* getroot.c */ 467extern int nfs_get_root(struct super_block *s, struct fs_context *fc); 468#if IS_ENABLED(CONFIG_NFS_V4) 469extern int nfs4_get_rootfh(struct nfs_server *server, struct nfs_fh *mntfh, bool); 470#endif 471 472struct nfs_pgio_completion_ops; 473/* read.c */ 474extern void nfs_pageio_init_read(struct nfs_pageio_descriptor *pgio, 475 struct inode *inode, bool force_mds, 476 const struct nfs_pgio_completion_ops *compl_ops); 477extern void nfs_read_prepare(struct rpc_task *task, void *calldata); 478extern void nfs_pageio_reset_read_mds(struct nfs_pageio_descriptor *pgio); 479 480/* super.c */ 481void nfs_umount_begin(struct super_block *); 482int nfs_statfs(struct dentry *, struct kstatfs *); 483int nfs_show_options(struct seq_file *, struct dentry *); 484int nfs_show_devname(struct seq_file *, struct dentry *); 485int nfs_show_path(struct seq_file *, struct dentry *); 486int nfs_show_stats(struct seq_file *, struct dentry *); 487int nfs_reconfigure(struct fs_context *); 488 489/* write.c */ 490extern void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio, 491 struct inode *inode, int ioflags, bool force_mds, 492 const struct nfs_pgio_completion_ops *compl_ops); 493extern void nfs_pageio_reset_write_mds(struct nfs_pageio_descriptor *pgio); 494extern void nfs_commit_free(struct nfs_commit_data *p); 495extern void nfs_write_prepare(struct rpc_task *task, void *calldata); 496extern void nfs_commit_prepare(struct rpc_task *task, void *calldata); 497extern int nfs_initiate_commit(struct rpc_clnt *clnt, 498 struct nfs_commit_data *data, 499 const struct nfs_rpc_ops *nfs_ops, 500 const struct rpc_call_ops *call_ops, 501 int how, int flags); 502extern void nfs_init_commit(struct nfs_commit_data *data, 503 struct list_head *head, 504 struct pnfs_layout_segment *lseg, 505 struct nfs_commit_info *cinfo); 506int nfs_scan_commit_list(struct list_head *src, struct list_head *dst, 507 struct nfs_commit_info *cinfo, int max); 508unsigned long nfs_reqs_to_commit(struct nfs_commit_info *); 509int nfs_scan_commit(struct inode *inode, struct list_head *dst, 510 struct nfs_commit_info *cinfo); 511void nfs_mark_request_commit(struct nfs_page *req, 512 struct pnfs_layout_segment *lseg, 513 struct nfs_commit_info *cinfo, 514 u32 ds_commit_idx); 515int nfs_write_need_commit(struct nfs_pgio_header *); 516void nfs_writeback_update_inode(struct nfs_pgio_header *hdr); 517int nfs_generic_commit_list(struct inode *inode, struct list_head *head, 518 int how, struct nfs_commit_info *cinfo); 519void nfs_retry_commit(struct list_head *page_list, 520 struct pnfs_layout_segment *lseg, 521 struct nfs_commit_info *cinfo, 522 u32 ds_commit_idx); 523void nfs_commitdata_release(struct nfs_commit_data *data); 524void nfs_request_add_commit_list(struct nfs_page *req, 525 struct nfs_commit_info *cinfo); 526void nfs_request_add_commit_list_locked(struct nfs_page *req, 527 struct list_head *dst, 528 struct nfs_commit_info *cinfo); 529void nfs_request_remove_commit_list(struct nfs_page *req, 530 struct nfs_commit_info *cinfo); 531void nfs_init_cinfo(struct nfs_commit_info *cinfo, 532 struct inode *inode, 533 struct nfs_direct_req *dreq); 534int nfs_key_timeout_notify(struct file *filp, struct inode *inode); 535bool nfs_ctx_key_to_expire(struct nfs_open_context *ctx, struct inode *inode); 536void nfs_pageio_stop_mirroring(struct nfs_pageio_descriptor *pgio); 537 538int nfs_filemap_write_and_wait_range(struct address_space *mapping, 539 loff_t lstart, loff_t lend); 540 541#ifdef CONFIG_NFS_V4_1 542static inline void 543pnfs_bucket_clear_pnfs_ds_commit_verifiers(struct pnfs_commit_bucket *buckets, 544 unsigned int nbuckets) 545{ 546 unsigned int i; 547 548 for (i = 0; i < nbuckets; i++) 549 buckets[i].direct_verf.committed = NFS_INVALID_STABLE_HOW; 550} 551static inline 552void nfs_clear_pnfs_ds_commit_verifiers(struct pnfs_ds_commit_info *cinfo) 553{ 554 struct pnfs_commit_array *array; 555 556 rcu_read_lock(); 557 list_for_each_entry_rcu(array, &cinfo->commits, cinfo_list) 558 pnfs_bucket_clear_pnfs_ds_commit_verifiers(array->buckets, 559 array->nbuckets); 560 rcu_read_unlock(); 561} 562#else 563static inline 564void nfs_clear_pnfs_ds_commit_verifiers(struct pnfs_ds_commit_info *cinfo) 565{ 566} 567#endif 568 569#ifdef CONFIG_MIGRATION 570extern int nfs_migrate_page(struct address_space *, 571 struct page *, struct page *, enum migrate_mode); 572#endif 573 574static inline int 575nfs_write_verifier_cmp(const struct nfs_write_verifier *v1, 576 const struct nfs_write_verifier *v2) 577{ 578 return memcmp(v1->data, v2->data, sizeof(v1->data)); 579} 580 581static inline bool 582nfs_write_match_verf(const struct nfs_writeverf *verf, 583 struct nfs_page *req) 584{ 585 return verf->committed > NFS_UNSTABLE && 586 !nfs_write_verifier_cmp(&req->wb_verf, &verf->verifier); 587} 588 589static inline gfp_t nfs_io_gfp_mask(void) 590{ 591 if (current->flags & PF_WQ_WORKER) 592 return GFP_KERNEL | __GFP_NORETRY | __GFP_NOWARN; 593 return GFP_KERNEL; 594} 595 596/* unlink.c */ 597extern struct rpc_task * 598nfs_async_rename(struct inode *old_dir, struct inode *new_dir, 599 struct dentry *old_dentry, struct dentry *new_dentry, 600 void (*complete)(struct rpc_task *, struct nfs_renamedata *)); 601extern int nfs_sillyrename(struct inode *dir, struct dentry *dentry); 602 603/* direct.c */ 604void nfs_init_cinfo_from_dreq(struct nfs_commit_info *cinfo, 605 struct nfs_direct_req *dreq); 606extern ssize_t nfs_dreq_bytes_left(struct nfs_direct_req *dreq); 607 608/* nfs4proc.c */ 609extern struct nfs_client *nfs4_init_client(struct nfs_client *clp, 610 const struct nfs_client_initdata *); 611extern int nfs40_walk_client_list(struct nfs_client *clp, 612 struct nfs_client **result, 613 const struct cred *cred); 614extern int nfs41_walk_client_list(struct nfs_client *clp, 615 struct nfs_client **result, 616 const struct cred *cred); 617extern void nfs4_test_session_trunk(struct rpc_clnt *clnt, 618 struct rpc_xprt *xprt, 619 void *data); 620 621static inline struct inode *nfs_igrab_and_active(struct inode *inode) 622{ 623 struct super_block *sb = inode->i_sb; 624 625 if (sb && nfs_sb_active(sb)) { 626 if (igrab(inode)) 627 return inode; 628 nfs_sb_deactive(sb); 629 } 630 return NULL; 631} 632 633static inline void nfs_iput_and_deactive(struct inode *inode) 634{ 635 if (inode != NULL) { 636 struct super_block *sb = inode->i_sb; 637 638 iput(inode); 639 nfs_sb_deactive(sb); 640 } 641} 642 643/* 644 * Determine the device name as a string 645 */ 646static inline char *nfs_devname(struct dentry *dentry, 647 char *buffer, ssize_t buflen) 648{ 649 char *dummy; 650 return nfs_path(&dummy, dentry, buffer, buflen, NFS_PATH_CANONICAL); 651} 652 653/* 654 * Determine the actual block size (and log2 thereof) 655 */ 656static inline 657unsigned long nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp) 658{ 659 /* make sure blocksize is a power of two */ 660 if ((bsize & (bsize - 1)) || nrbitsp) { 661 unsigned char nrbits; 662 663 for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--) 664 ; 665 bsize = 1 << nrbits; 666 if (nrbitsp) 667 *nrbitsp = nrbits; 668 } 669 670 return bsize; 671} 672 673/* 674 * Calculate the number of 512byte blocks used. 675 */ 676static inline blkcnt_t nfs_calc_block_size(u64 tsize) 677{ 678 blkcnt_t used = (tsize + 511) >> 9; 679 return (used > ULONG_MAX) ? ULONG_MAX : used; 680} 681 682/* 683 * Compute and set NFS server blocksize 684 */ 685static inline 686unsigned long nfs_block_size(unsigned long bsize, unsigned char *nrbitsp) 687{ 688 if (bsize < NFS_MIN_FILE_IO_SIZE) 689 bsize = NFS_DEF_FILE_IO_SIZE; 690 else if (bsize >= NFS_MAX_FILE_IO_SIZE) 691 bsize = NFS_MAX_FILE_IO_SIZE; 692 693 return nfs_block_bits(bsize, nrbitsp); 694} 695 696/* 697 * Determine the maximum file size for a superblock 698 */ 699static inline 700void nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize) 701{ 702 sb->s_maxbytes = (loff_t)maxfilesize; 703 if (sb->s_maxbytes > MAX_LFS_FILESIZE || sb->s_maxbytes <= 0) 704 sb->s_maxbytes = MAX_LFS_FILESIZE; 705} 706 707/* 708 * Record the page as unstable (an extra writeback period) and mark its 709 * inode as dirty. 710 */ 711static inline 712void nfs_mark_page_unstable(struct page *page, struct nfs_commit_info *cinfo) 713{ 714 if (!cinfo->dreq) { 715 struct inode *inode = page_file_mapping(page)->host; 716 717 /* This page is really still in write-back - just that the 718 * writeback is happening on the server now. 719 */ 720 inc_node_page_state(page, NR_WRITEBACK); 721 inc_wb_stat(&inode_to_bdi(inode)->wb, WB_WRITEBACK); 722 __mark_inode_dirty(inode, I_DIRTY_DATASYNC); 723 } 724} 725 726/* 727 * Determine the number of bytes of data the page contains 728 */ 729static inline 730unsigned int nfs_page_length(struct page *page) 731{ 732 loff_t i_size = i_size_read(page_file_mapping(page)->host); 733 734 if (i_size > 0) { 735 pgoff_t index = page_index(page); 736 pgoff_t end_index = (i_size - 1) >> PAGE_SHIFT; 737 if (index < end_index) 738 return PAGE_SIZE; 739 if (index == end_index) 740 return ((i_size - 1) & ~PAGE_MASK) + 1; 741 } 742 return 0; 743} 744 745/* 746 * Convert a umode to a dirent->d_type 747 */ 748static inline 749unsigned char nfs_umode_to_dtype(umode_t mode) 750{ 751 return (mode >> 12) & 15; 752} 753 754/* 755 * Determine the number of pages in an array of length 'len' and 756 * with a base offset of 'base' 757 */ 758static inline 759unsigned int nfs_page_array_len(unsigned int base, size_t len) 760{ 761 return ((unsigned long)len + (unsigned long)base + 762 PAGE_SIZE - 1) >> PAGE_SHIFT; 763} 764 765/* 766 * Convert a struct timespec64 into a 64-bit change attribute 767 * 768 * This does approximately the same thing as timespec64_to_ns(), 769 * but for calculation efficiency, we multiply the seconds by 770 * 1024*1024*1024. 771 */ 772static inline 773u64 nfs_timespec_to_change_attr(const struct timespec64 *ts) 774{ 775 return ((u64)ts->tv_sec << 30) + ts->tv_nsec; 776} 777 778#ifdef CONFIG_CRC32 779/** 780 * nfs_fhandle_hash - calculate the crc32 hash for the filehandle 781 * @fh - pointer to filehandle 782 * 783 * returns a crc32 hash for the filehandle that is compatible with 784 * the one displayed by "wireshark". 785 */ 786static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh) 787{ 788 return ~crc32_le(0xFFFFFFFF, &fh->data[0], fh->size); 789} 790static inline u32 nfs_stateid_hash(const nfs4_stateid *stateid) 791{ 792 return ~crc32_le(0xFFFFFFFF, &stateid->other[0], 793 NFS4_STATEID_OTHER_SIZE); 794} 795#else 796static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh) 797{ 798 return 0; 799} 800static inline u32 nfs_stateid_hash(nfs4_stateid *stateid) 801{ 802 return 0; 803} 804#endif 805 806static inline bool nfs_error_is_fatal(int err) 807{ 808 switch (err) { 809 case -ERESTARTSYS: 810 case -EINTR: 811 case -EACCES: 812 case -EDQUOT: 813 case -EFBIG: 814 case -EIO: 815 case -ENOSPC: 816 case -EROFS: 817 case -ESTALE: 818 case -E2BIG: 819 case -ENOMEM: 820 case -ETIMEDOUT: 821 return true; 822 default: 823 return false; 824 } 825} 826 827static inline bool nfs_error_is_fatal_on_server(int err) 828{ 829 switch (err) { 830 case 0: 831 case -ERESTARTSYS: 832 case -EINTR: 833 case -ENOMEM: 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 */ 843static 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