| 1 | /* |
| 2 | * NFS internal definitions |
| 3 | */ |
| 4 | |
| 5 | #include "nfs4_fs.h" |
| 6 | #include <linux/mount.h> |
| 7 | #include <linux/security.h> |
| 8 | #include <linux/crc32.h> |
| 9 | |
| 10 | #define NFS_MS_MASK (MS_RDONLY|MS_NOSUID|MS_NODEV|MS_NOEXEC|MS_SYNCHRONOUS) |
| 11 | |
| 12 | struct nfs_string; |
| 13 | |
| 14 | /* Maximum number of readahead requests |
| 15 | * FIXME: this should really be a sysctl so that users may tune it to suit |
| 16 | * their needs. People that do NFS over a slow network, might for |
| 17 | * instance want to reduce it to something closer to 1 for improved |
| 18 | * interactive response. |
| 19 | */ |
| 20 | #define NFS_MAX_READAHEAD (RPC_DEF_SLOT_TABLE - 1) |
| 21 | |
| 22 | static inline void nfs_attr_check_mountpoint(struct super_block *parent, struct nfs_fattr *fattr) |
| 23 | { |
| 24 | if (!nfs_fsid_equal(&NFS_SB(parent)->fsid, &fattr->fsid)) |
| 25 | fattr->valid |= NFS_ATTR_FATTR_MOUNTPOINT; |
| 26 | } |
| 27 | |
| 28 | static inline int nfs_attr_use_mounted_on_fileid(struct nfs_fattr *fattr) |
| 29 | { |
| 30 | if (((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) == 0) || |
| 31 | (((fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT) == 0) && |
| 32 | ((fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) == 0))) |
| 33 | return 0; |
| 34 | |
| 35 | fattr->fileid = fattr->mounted_on_fileid; |
| 36 | return 1; |
| 37 | } |
| 38 | |
| 39 | struct nfs_clone_mount { |
| 40 | const struct super_block *sb; |
| 41 | const struct dentry *dentry; |
| 42 | struct nfs_fh *fh; |
| 43 | struct nfs_fattr *fattr; |
| 44 | char *hostname; |
| 45 | char *mnt_path; |
| 46 | struct sockaddr *addr; |
| 47 | size_t addrlen; |
| 48 | rpc_authflavor_t authflavor; |
| 49 | }; |
| 50 | |
| 51 | /* |
| 52 | * Note: RFC 1813 doesn't limit the number of auth flavors that |
| 53 | * a server can return, so make something up. |
| 54 | */ |
| 55 | #define NFS_MAX_SECFLAVORS (12) |
| 56 | |
| 57 | /* |
| 58 | * Value used if the user did not specify a port value. |
| 59 | */ |
| 60 | #define NFS_UNSPEC_PORT (-1) |
| 61 | |
| 62 | /* |
| 63 | * Maximum number of pages that readdir can use for creating |
| 64 | * a vmapped array of pages. |
| 65 | */ |
| 66 | #define NFS_MAX_READDIR_PAGES 8 |
| 67 | |
| 68 | struct nfs_client_initdata { |
| 69 | unsigned long init_flags; |
| 70 | const char *hostname; |
| 71 | const struct sockaddr *addr; |
| 72 | size_t addrlen; |
| 73 | struct nfs_subversion *nfs_mod; |
| 74 | int proto; |
| 75 | u32 minorversion; |
| 76 | struct net *net; |
| 77 | }; |
| 78 | |
| 79 | /* |
| 80 | * In-kernel mount arguments |
| 81 | */ |
| 82 | struct nfs_parsed_mount_data { |
| 83 | int flags; |
| 84 | unsigned int rsize, wsize; |
| 85 | unsigned int timeo, retrans; |
| 86 | unsigned int acregmin, acregmax, |
| 87 | acdirmin, acdirmax; |
| 88 | unsigned int namlen; |
| 89 | unsigned int options; |
| 90 | unsigned int bsize; |
| 91 | struct nfs_auth_info auth_info; |
| 92 | rpc_authflavor_t selected_flavor; |
| 93 | char *client_address; |
| 94 | unsigned int version; |
| 95 | unsigned int minorversion; |
| 96 | char *fscache_uniq; |
| 97 | bool need_mount; |
| 98 | |
| 99 | struct { |
| 100 | struct sockaddr_storage address; |
| 101 | size_t addrlen; |
| 102 | char *hostname; |
| 103 | u32 version; |
| 104 | int port; |
| 105 | unsigned short protocol; |
| 106 | } mount_server; |
| 107 | |
| 108 | struct { |
| 109 | struct sockaddr_storage address; |
| 110 | size_t addrlen; |
| 111 | char *hostname; |
| 112 | char *export_path; |
| 113 | int port; |
| 114 | unsigned short protocol; |
| 115 | } nfs_server; |
| 116 | |
| 117 | struct security_mnt_opts lsm_opts; |
| 118 | struct net *net; |
| 119 | }; |
| 120 | |
| 121 | /* mount_clnt.c */ |
| 122 | struct nfs_mount_request { |
| 123 | struct sockaddr *sap; |
| 124 | size_t salen; |
| 125 | char *hostname; |
| 126 | char *dirpath; |
| 127 | u32 version; |
| 128 | unsigned short protocol; |
| 129 | struct nfs_fh *fh; |
| 130 | int noresvport; |
| 131 | unsigned int *auth_flav_len; |
| 132 | rpc_authflavor_t *auth_flavs; |
| 133 | struct net *net; |
| 134 | }; |
| 135 | |
| 136 | struct nfs_mount_info { |
| 137 | void (*fill_super)(struct super_block *, struct nfs_mount_info *); |
| 138 | int (*set_security)(struct super_block *, struct dentry *, struct nfs_mount_info *); |
| 139 | struct nfs_parsed_mount_data *parsed; |
| 140 | struct nfs_clone_mount *cloned; |
| 141 | struct nfs_fh *mntfh; |
| 142 | }; |
| 143 | |
| 144 | extern int nfs_mount(struct nfs_mount_request *info); |
| 145 | extern void nfs_umount(const struct nfs_mount_request *info); |
| 146 | |
| 147 | /* client.c */ |
| 148 | extern const struct rpc_program nfs_program; |
| 149 | extern void nfs_clients_init(struct net *net); |
| 150 | extern struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *); |
| 151 | int nfs_create_rpc_client(struct nfs_client *, const struct rpc_timeout *, rpc_authflavor_t); |
| 152 | struct nfs_client *nfs_get_client(const struct nfs_client_initdata *, |
| 153 | const struct rpc_timeout *, const char *, |
| 154 | rpc_authflavor_t); |
| 155 | int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *, struct nfs_fattr *); |
| 156 | void nfs_server_insert_lists(struct nfs_server *); |
| 157 | void nfs_server_remove_lists(struct nfs_server *); |
| 158 | void nfs_init_timeout_values(struct rpc_timeout *, int, unsigned int, unsigned int); |
| 159 | int nfs_init_server_rpcclient(struct nfs_server *, const struct rpc_timeout *t, |
| 160 | rpc_authflavor_t); |
| 161 | struct nfs_server *nfs_alloc_server(void); |
| 162 | void nfs_server_copy_userdata(struct nfs_server *, struct nfs_server *); |
| 163 | |
| 164 | extern void nfs_cleanup_cb_ident_idr(struct net *); |
| 165 | extern void nfs_put_client(struct nfs_client *); |
| 166 | extern void nfs_free_client(struct nfs_client *); |
| 167 | extern struct nfs_client *nfs4_find_client_ident(struct net *, int); |
| 168 | extern struct nfs_client * |
| 169 | nfs4_find_client_sessionid(struct net *, const struct sockaddr *, |
| 170 | struct nfs4_sessionid *, u32); |
| 171 | extern struct nfs_server *nfs_create_server(struct nfs_mount_info *, |
| 172 | struct nfs_subversion *); |
| 173 | extern struct nfs_server *nfs4_create_server( |
| 174 | struct nfs_mount_info *, |
| 175 | struct nfs_subversion *); |
| 176 | extern struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *, |
| 177 | struct nfs_fh *); |
| 178 | extern int nfs4_update_server(struct nfs_server *server, const char *hostname, |
| 179 | struct sockaddr *sap, size_t salen, |
| 180 | struct net *net); |
| 181 | extern void nfs_free_server(struct nfs_server *server); |
| 182 | extern struct nfs_server *nfs_clone_server(struct nfs_server *, |
| 183 | struct nfs_fh *, |
| 184 | struct nfs_fattr *, |
| 185 | rpc_authflavor_t); |
| 186 | extern int nfs_wait_client_init_complete(const struct nfs_client *clp); |
| 187 | extern void nfs_mark_client_ready(struct nfs_client *clp, int state); |
| 188 | extern struct nfs_client *nfs4_set_ds_client(struct nfs_client* mds_clp, |
| 189 | const struct sockaddr *ds_addr, |
| 190 | int ds_addrlen, int ds_proto, |
| 191 | unsigned int ds_timeo, |
| 192 | unsigned int ds_retrans); |
| 193 | extern struct rpc_clnt *nfs4_find_or_create_ds_client(struct nfs_client *, |
| 194 | struct inode *); |
| 195 | #ifdef CONFIG_PROC_FS |
| 196 | extern int __init nfs_fs_proc_init(void); |
| 197 | extern void nfs_fs_proc_exit(void); |
| 198 | extern int nfs_fs_proc_net_init(struct net *net); |
| 199 | extern void nfs_fs_proc_net_exit(struct net *net); |
| 200 | #else |
| 201 | static inline int nfs_fs_proc_net_init(struct net *net) |
| 202 | { |
| 203 | return 0; |
| 204 | } |
| 205 | static inline void nfs_fs_proc_net_exit(struct net *net) |
| 206 | { |
| 207 | } |
| 208 | static inline int nfs_fs_proc_init(void) |
| 209 | { |
| 210 | return 0; |
| 211 | } |
| 212 | static inline void nfs_fs_proc_exit(void) |
| 213 | { |
| 214 | } |
| 215 | #endif |
| 216 | |
| 217 | #ifdef CONFIG_NFS_V4_1 |
| 218 | int nfs_sockaddr_match_ipaddr(const struct sockaddr *, const struct sockaddr *); |
| 219 | #endif |
| 220 | |
| 221 | /* callback_xdr.c */ |
| 222 | extern struct svc_version nfs4_callback_version1; |
| 223 | extern struct svc_version nfs4_callback_version4; |
| 224 | |
| 225 | struct nfs_pageio_descriptor; |
| 226 | /* pagelist.c */ |
| 227 | extern int __init nfs_init_nfspagecache(void); |
| 228 | extern void nfs_destroy_nfspagecache(void); |
| 229 | extern int __init nfs_init_readpagecache(void); |
| 230 | extern void nfs_destroy_readpagecache(void); |
| 231 | extern int __init nfs_init_writepagecache(void); |
| 232 | extern void nfs_destroy_writepagecache(void); |
| 233 | |
| 234 | extern int __init nfs_init_directcache(void); |
| 235 | extern void nfs_destroy_directcache(void); |
| 236 | extern void nfs_pgheader_init(struct nfs_pageio_descriptor *desc, |
| 237 | struct nfs_pgio_header *hdr, |
| 238 | void (*release)(struct nfs_pgio_header *hdr)); |
| 239 | void nfs_set_pgio_error(struct nfs_pgio_header *hdr, int error, loff_t pos); |
| 240 | int nfs_iocounter_wait(struct nfs_io_counter *c); |
| 241 | |
| 242 | extern const struct nfs_pageio_ops nfs_pgio_rw_ops; |
| 243 | struct nfs_pgio_header *nfs_pgio_header_alloc(const struct nfs_rw_ops *); |
| 244 | void nfs_pgio_header_free(struct nfs_pgio_header *); |
| 245 | void nfs_pgio_data_destroy(struct nfs_pgio_header *); |
| 246 | int nfs_generic_pgio(struct nfs_pageio_descriptor *, struct nfs_pgio_header *); |
| 247 | int nfs_initiate_pgio(struct rpc_clnt *, struct nfs_pgio_header *, |
| 248 | const struct rpc_call_ops *, int, int); |
| 249 | void nfs_free_request(struct nfs_page *req); |
| 250 | |
| 251 | static inline void nfs_iocounter_init(struct nfs_io_counter *c) |
| 252 | { |
| 253 | c->flags = 0; |
| 254 | atomic_set(&c->io_count, 0); |
| 255 | } |
| 256 | |
| 257 | /* nfs2xdr.c */ |
| 258 | extern struct rpc_procinfo nfs_procedures[]; |
| 259 | extern int nfs2_decode_dirent(struct xdr_stream *, |
| 260 | struct nfs_entry *, int); |
| 261 | |
| 262 | /* nfs3xdr.c */ |
| 263 | extern struct rpc_procinfo nfs3_procedures[]; |
| 264 | extern int nfs3_decode_dirent(struct xdr_stream *, |
| 265 | struct nfs_entry *, int); |
| 266 | |
| 267 | /* nfs4xdr.c */ |
| 268 | #if IS_ENABLED(CONFIG_NFS_V4) |
| 269 | extern int nfs4_decode_dirent(struct xdr_stream *, |
| 270 | struct nfs_entry *, int); |
| 271 | #endif |
| 272 | #ifdef CONFIG_NFS_V4_1 |
| 273 | extern const u32 nfs41_maxread_overhead; |
| 274 | extern const u32 nfs41_maxwrite_overhead; |
| 275 | extern const u32 nfs41_maxgetdevinfo_overhead; |
| 276 | #endif |
| 277 | |
| 278 | /* nfs4proc.c */ |
| 279 | #if IS_ENABLED(CONFIG_NFS_V4) |
| 280 | extern struct rpc_procinfo nfs4_procedures[]; |
| 281 | #endif |
| 282 | |
| 283 | #ifdef CONFIG_NFS_V4_SECURITY_LABEL |
| 284 | extern struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags); |
| 285 | static inline void nfs4_label_free(struct nfs4_label *label) |
| 286 | { |
| 287 | if (label) { |
| 288 | kfree(label->label); |
| 289 | kfree(label); |
| 290 | } |
| 291 | return; |
| 292 | } |
| 293 | |
| 294 | static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi) |
| 295 | { |
| 296 | if (nfs_server_capable(&nfsi->vfs_inode, NFS_CAP_SECURITY_LABEL)) |
| 297 | nfsi->cache_validity |= NFS_INO_INVALID_LABEL; |
| 298 | } |
| 299 | #else |
| 300 | static inline struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags) { return NULL; } |
| 301 | static inline void nfs4_label_free(void *label) {} |
| 302 | static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi) |
| 303 | { |
| 304 | } |
| 305 | #endif /* CONFIG_NFS_V4_SECURITY_LABEL */ |
| 306 | |
| 307 | /* proc.c */ |
| 308 | void nfs_close_context(struct nfs_open_context *ctx, int is_sync); |
| 309 | extern struct nfs_client *nfs_init_client(struct nfs_client *clp, |
| 310 | const struct rpc_timeout *timeparms, |
| 311 | const char *ip_addr); |
| 312 | |
| 313 | /* dir.c */ |
| 314 | extern void nfs_force_use_readdirplus(struct inode *dir); |
| 315 | extern unsigned long nfs_access_cache_count(struct shrinker *shrink, |
| 316 | struct shrink_control *sc); |
| 317 | extern unsigned long nfs_access_cache_scan(struct shrinker *shrink, |
| 318 | struct shrink_control *sc); |
| 319 | struct dentry *nfs_lookup(struct inode *, struct dentry *, unsigned int); |
| 320 | int nfs_create(struct inode *, struct dentry *, umode_t, bool); |
| 321 | int nfs_mkdir(struct inode *, struct dentry *, umode_t); |
| 322 | int nfs_rmdir(struct inode *, struct dentry *); |
| 323 | int nfs_unlink(struct inode *, struct dentry *); |
| 324 | int nfs_symlink(struct inode *, struct dentry *, const char *); |
| 325 | int nfs_link(struct dentry *, struct inode *, struct dentry *); |
| 326 | int nfs_mknod(struct inode *, struct dentry *, umode_t, dev_t); |
| 327 | int nfs_rename(struct inode *, struct dentry *, struct inode *, struct dentry *); |
| 328 | |
| 329 | /* file.c */ |
| 330 | int nfs_file_fsync_commit(struct file *, loff_t, loff_t, int); |
| 331 | loff_t nfs_file_llseek(struct file *, loff_t, int); |
| 332 | int nfs_file_flush(struct file *, fl_owner_t); |
| 333 | ssize_t nfs_file_read(struct kiocb *, struct iov_iter *); |
| 334 | ssize_t nfs_file_splice_read(struct file *, loff_t *, struct pipe_inode_info *, |
| 335 | size_t, unsigned int); |
| 336 | int nfs_file_mmap(struct file *, struct vm_area_struct *); |
| 337 | ssize_t nfs_file_write(struct kiocb *, struct iov_iter *); |
| 338 | int nfs_file_release(struct inode *, struct file *); |
| 339 | int nfs_lock(struct file *, int, struct file_lock *); |
| 340 | int nfs_flock(struct file *, int, struct file_lock *); |
| 341 | int nfs_check_flags(int); |
| 342 | |
| 343 | /* inode.c */ |
| 344 | extern struct workqueue_struct *nfsiod_workqueue; |
| 345 | extern struct inode *nfs_alloc_inode(struct super_block *sb); |
| 346 | extern void nfs_destroy_inode(struct inode *); |
| 347 | extern int nfs_write_inode(struct inode *, struct writeback_control *); |
| 348 | extern int nfs_drop_inode(struct inode *); |
| 349 | extern void nfs_clear_inode(struct inode *); |
| 350 | extern void nfs_evict_inode(struct inode *); |
| 351 | void nfs_zap_acl_cache(struct inode *inode); |
| 352 | extern int nfs_wait_bit_killable(struct wait_bit_key *key); |
| 353 | |
| 354 | /* super.c */ |
| 355 | extern const struct super_operations nfs_sops; |
| 356 | extern struct file_system_type nfs_fs_type; |
| 357 | extern struct file_system_type nfs_xdev_fs_type; |
| 358 | #if IS_ENABLED(CONFIG_NFS_V4) |
| 359 | extern struct file_system_type nfs4_xdev_fs_type; |
| 360 | extern struct file_system_type nfs4_referral_fs_type; |
| 361 | #endif |
| 362 | bool nfs_auth_info_match(const struct nfs_auth_info *, rpc_authflavor_t); |
| 363 | struct dentry *nfs_try_mount(int, const char *, struct nfs_mount_info *, |
| 364 | struct nfs_subversion *); |
| 365 | void nfs_initialise_sb(struct super_block *); |
| 366 | int nfs_set_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *); |
| 367 | int nfs_clone_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *); |
| 368 | struct dentry *nfs_fs_mount_common(struct nfs_server *, int, const char *, |
| 369 | struct nfs_mount_info *, struct nfs_subversion *); |
| 370 | struct dentry *nfs_fs_mount(struct file_system_type *, int, const char *, void *); |
| 371 | struct dentry * nfs_xdev_mount_common(struct file_system_type *, int, |
| 372 | const char *, struct nfs_mount_info *); |
| 373 | void nfs_kill_super(struct super_block *); |
| 374 | void nfs_fill_super(struct super_block *, struct nfs_mount_info *); |
| 375 | |
| 376 | extern struct rpc_stat nfs_rpcstat; |
| 377 | |
| 378 | extern int __init register_nfs_fs(void); |
| 379 | extern void __exit unregister_nfs_fs(void); |
| 380 | extern void nfs_sb_active(struct super_block *sb); |
| 381 | extern void nfs_sb_deactive(struct super_block *sb); |
| 382 | |
| 383 | /* namespace.c */ |
| 384 | #define NFS_PATH_CANONICAL 1 |
| 385 | extern char *nfs_path(char **p, struct dentry *dentry, |
| 386 | char *buffer, ssize_t buflen, unsigned flags); |
| 387 | extern struct vfsmount *nfs_d_automount(struct path *path); |
| 388 | struct vfsmount *nfs_submount(struct nfs_server *, struct dentry *, |
| 389 | struct nfs_fh *, struct nfs_fattr *); |
| 390 | struct vfsmount *nfs_do_submount(struct dentry *, struct nfs_fh *, |
| 391 | struct nfs_fattr *, rpc_authflavor_t); |
| 392 | |
| 393 | /* getroot.c */ |
| 394 | extern struct dentry *nfs_get_root(struct super_block *, struct nfs_fh *, |
| 395 | const char *); |
| 396 | #if IS_ENABLED(CONFIG_NFS_V4) |
| 397 | extern struct dentry *nfs4_get_root(struct super_block *, struct nfs_fh *, |
| 398 | const char *); |
| 399 | |
| 400 | extern int nfs4_get_rootfh(struct nfs_server *server, struct nfs_fh *mntfh, bool); |
| 401 | #endif |
| 402 | |
| 403 | struct nfs_pgio_completion_ops; |
| 404 | /* read.c */ |
| 405 | extern void nfs_pageio_init_read(struct nfs_pageio_descriptor *pgio, |
| 406 | struct inode *inode, bool force_mds, |
| 407 | const struct nfs_pgio_completion_ops *compl_ops); |
| 408 | extern void nfs_read_prepare(struct rpc_task *task, void *calldata); |
| 409 | extern void nfs_pageio_reset_read_mds(struct nfs_pageio_descriptor *pgio); |
| 410 | |
| 411 | /* super.c */ |
| 412 | void nfs_clone_super(struct super_block *, struct nfs_mount_info *); |
| 413 | void nfs_umount_begin(struct super_block *); |
| 414 | int nfs_statfs(struct dentry *, struct kstatfs *); |
| 415 | int nfs_show_options(struct seq_file *, struct dentry *); |
| 416 | int nfs_show_devname(struct seq_file *, struct dentry *); |
| 417 | int nfs_show_path(struct seq_file *, struct dentry *); |
| 418 | int nfs_show_stats(struct seq_file *, struct dentry *); |
| 419 | void nfs_put_super(struct super_block *); |
| 420 | int nfs_remount(struct super_block *sb, int *flags, char *raw_data); |
| 421 | |
| 422 | /* write.c */ |
| 423 | extern void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio, |
| 424 | struct inode *inode, int ioflags, bool force_mds, |
| 425 | const struct nfs_pgio_completion_ops *compl_ops); |
| 426 | extern void nfs_pageio_reset_write_mds(struct nfs_pageio_descriptor *pgio); |
| 427 | extern void nfs_commit_free(struct nfs_commit_data *p); |
| 428 | extern void nfs_write_prepare(struct rpc_task *task, void *calldata); |
| 429 | extern void nfs_commit_prepare(struct rpc_task *task, void *calldata); |
| 430 | extern int nfs_initiate_commit(struct rpc_clnt *clnt, |
| 431 | struct nfs_commit_data *data, |
| 432 | const struct rpc_call_ops *call_ops, |
| 433 | int how, int flags); |
| 434 | extern void nfs_init_commit(struct nfs_commit_data *data, |
| 435 | struct list_head *head, |
| 436 | struct pnfs_layout_segment *lseg, |
| 437 | struct nfs_commit_info *cinfo); |
| 438 | int nfs_scan_commit_list(struct list_head *src, struct list_head *dst, |
| 439 | struct nfs_commit_info *cinfo, int max); |
| 440 | unsigned long nfs_reqs_to_commit(struct nfs_commit_info *); |
| 441 | int nfs_scan_commit(struct inode *inode, struct list_head *dst, |
| 442 | struct nfs_commit_info *cinfo); |
| 443 | void nfs_mark_request_commit(struct nfs_page *req, |
| 444 | struct pnfs_layout_segment *lseg, |
| 445 | struct nfs_commit_info *cinfo); |
| 446 | int nfs_write_need_commit(struct nfs_pgio_header *); |
| 447 | int nfs_generic_commit_list(struct inode *inode, struct list_head *head, |
| 448 | int how, struct nfs_commit_info *cinfo); |
| 449 | void nfs_retry_commit(struct list_head *page_list, |
| 450 | struct pnfs_layout_segment *lseg, |
| 451 | struct nfs_commit_info *cinfo); |
| 452 | void nfs_commitdata_release(struct nfs_commit_data *data); |
| 453 | void nfs_request_add_commit_list(struct nfs_page *req, struct list_head *dst, |
| 454 | struct nfs_commit_info *cinfo); |
| 455 | void nfs_request_remove_commit_list(struct nfs_page *req, |
| 456 | struct nfs_commit_info *cinfo); |
| 457 | void nfs_init_cinfo(struct nfs_commit_info *cinfo, |
| 458 | struct inode *inode, |
| 459 | struct nfs_direct_req *dreq); |
| 460 | int nfs_key_timeout_notify(struct file *filp, struct inode *inode); |
| 461 | bool nfs_ctx_key_to_expire(struct nfs_open_context *ctx); |
| 462 | |
| 463 | #ifdef CONFIG_MIGRATION |
| 464 | extern int nfs_migrate_page(struct address_space *, |
| 465 | struct page *, struct page *, enum migrate_mode); |
| 466 | #else |
| 467 | #define nfs_migrate_page NULL |
| 468 | #endif |
| 469 | |
| 470 | /* unlink.c */ |
| 471 | extern struct rpc_task * |
| 472 | nfs_async_rename(struct inode *old_dir, struct inode *new_dir, |
| 473 | struct dentry *old_dentry, struct dentry *new_dentry, |
| 474 | void (*complete)(struct rpc_task *, struct nfs_renamedata *)); |
| 475 | extern int nfs_sillyrename(struct inode *dir, struct dentry *dentry); |
| 476 | |
| 477 | /* direct.c */ |
| 478 | void nfs_init_cinfo_from_dreq(struct nfs_commit_info *cinfo, |
| 479 | struct nfs_direct_req *dreq); |
| 480 | static inline void nfs_inode_dio_wait(struct inode *inode) |
| 481 | { |
| 482 | inode_dio_wait(inode); |
| 483 | } |
| 484 | extern ssize_t nfs_dreq_bytes_left(struct nfs_direct_req *dreq); |
| 485 | |
| 486 | /* nfs4proc.c */ |
| 487 | extern void __nfs4_read_done_cb(struct nfs_pgio_header *); |
| 488 | extern struct nfs_client *nfs4_init_client(struct nfs_client *clp, |
| 489 | const struct rpc_timeout *timeparms, |
| 490 | const char *ip_addr); |
| 491 | extern int nfs40_walk_client_list(struct nfs_client *clp, |
| 492 | struct nfs_client **result, |
| 493 | struct rpc_cred *cred); |
| 494 | extern int nfs41_walk_client_list(struct nfs_client *clp, |
| 495 | struct nfs_client **result, |
| 496 | struct rpc_cred *cred); |
| 497 | |
| 498 | /* |
| 499 | * Determine the device name as a string |
| 500 | */ |
| 501 | static inline char *nfs_devname(struct dentry *dentry, |
| 502 | char *buffer, ssize_t buflen) |
| 503 | { |
| 504 | char *dummy; |
| 505 | return nfs_path(&dummy, dentry, buffer, buflen, NFS_PATH_CANONICAL); |
| 506 | } |
| 507 | |
| 508 | /* |
| 509 | * Determine the actual block size (and log2 thereof) |
| 510 | */ |
| 511 | static inline |
| 512 | unsigned long nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp) |
| 513 | { |
| 514 | /* make sure blocksize is a power of two */ |
| 515 | if ((bsize & (bsize - 1)) || nrbitsp) { |
| 516 | unsigned char nrbits; |
| 517 | |
| 518 | for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--) |
| 519 | ; |
| 520 | bsize = 1 << nrbits; |
| 521 | if (nrbitsp) |
| 522 | *nrbitsp = nrbits; |
| 523 | } |
| 524 | |
| 525 | return bsize; |
| 526 | } |
| 527 | |
| 528 | /* |
| 529 | * Calculate the number of 512byte blocks used. |
| 530 | */ |
| 531 | static inline blkcnt_t nfs_calc_block_size(u64 tsize) |
| 532 | { |
| 533 | blkcnt_t used = (tsize + 511) >> 9; |
| 534 | return (used > ULONG_MAX) ? ULONG_MAX : used; |
| 535 | } |
| 536 | |
| 537 | /* |
| 538 | * Compute and set NFS server blocksize |
| 539 | */ |
| 540 | static inline |
| 541 | unsigned long nfs_block_size(unsigned long bsize, unsigned char *nrbitsp) |
| 542 | { |
| 543 | if (bsize < NFS_MIN_FILE_IO_SIZE) |
| 544 | bsize = NFS_DEF_FILE_IO_SIZE; |
| 545 | else if (bsize >= NFS_MAX_FILE_IO_SIZE) |
| 546 | bsize = NFS_MAX_FILE_IO_SIZE; |
| 547 | |
| 548 | return nfs_block_bits(bsize, nrbitsp); |
| 549 | } |
| 550 | |
| 551 | /* |
| 552 | * Determine the maximum file size for a superblock |
| 553 | */ |
| 554 | static inline |
| 555 | void nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize) |
| 556 | { |
| 557 | sb->s_maxbytes = (loff_t)maxfilesize; |
| 558 | if (sb->s_maxbytes > MAX_LFS_FILESIZE || sb->s_maxbytes <= 0) |
| 559 | sb->s_maxbytes = MAX_LFS_FILESIZE; |
| 560 | } |
| 561 | |
| 562 | /* |
| 563 | * Determine the number of bytes of data the page contains |
| 564 | */ |
| 565 | static inline |
| 566 | unsigned int nfs_page_length(struct page *page) |
| 567 | { |
| 568 | loff_t i_size = i_size_read(page_file_mapping(page)->host); |
| 569 | |
| 570 | if (i_size > 0) { |
| 571 | pgoff_t page_index = page_file_index(page); |
| 572 | pgoff_t end_index = (i_size - 1) >> PAGE_CACHE_SHIFT; |
| 573 | if (page_index < end_index) |
| 574 | return PAGE_CACHE_SIZE; |
| 575 | if (page_index == end_index) |
| 576 | return ((i_size - 1) & ~PAGE_CACHE_MASK) + 1; |
| 577 | } |
| 578 | return 0; |
| 579 | } |
| 580 | |
| 581 | /* |
| 582 | * Convert a umode to a dirent->d_type |
| 583 | */ |
| 584 | static inline |
| 585 | unsigned char nfs_umode_to_dtype(umode_t mode) |
| 586 | { |
| 587 | return (mode >> 12) & 15; |
| 588 | } |
| 589 | |
| 590 | /* |
| 591 | * Determine the number of pages in an array of length 'len' and |
| 592 | * with a base offset of 'base' |
| 593 | */ |
| 594 | static inline |
| 595 | unsigned int nfs_page_array_len(unsigned int base, size_t len) |
| 596 | { |
| 597 | return ((unsigned long)len + (unsigned long)base + |
| 598 | PAGE_SIZE - 1) >> PAGE_SHIFT; |
| 599 | } |
| 600 | |
| 601 | /* |
| 602 | * Convert a struct timespec into a 64-bit change attribute |
| 603 | * |
| 604 | * This does approximately the same thing as timespec_to_ns(), |
| 605 | * but for calculation efficiency, we multiply the seconds by |
| 606 | * 1024*1024*1024. |
| 607 | */ |
| 608 | static inline |
| 609 | u64 nfs_timespec_to_change_attr(const struct timespec *ts) |
| 610 | { |
| 611 | return ((u64)ts->tv_sec << 30) + ts->tv_nsec; |
| 612 | } |
| 613 | |
| 614 | #ifdef CONFIG_CRC32 |
| 615 | /** |
| 616 | * nfs_fhandle_hash - calculate the crc32 hash for the filehandle |
| 617 | * @fh - pointer to filehandle |
| 618 | * |
| 619 | * returns a crc32 hash for the filehandle that is compatible with |
| 620 | * the one displayed by "wireshark". |
| 621 | */ |
| 622 | static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh) |
| 623 | { |
| 624 | return ~crc32_le(0xFFFFFFFF, &fh->data[0], fh->size); |
| 625 | } |
| 626 | #else |
| 627 | static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh) |
| 628 | { |
| 629 | return 0; |
| 630 | } |
| 631 | #endif |