1/* SPDX-License-Identifier: GPL-2.0 */ 2/* 3 * Hodge-podge collection of knfsd-related stuff. 4 * I will sort this out later. 5 * 6 * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de> 7 */ 8 9#ifndef LINUX_NFSD_NFSD_H 10#define LINUX_NFSD_NFSD_H 11 12#include <linux/types.h> 13#include <linux/mount.h> 14 15#include <linux/nfs.h> 16#include <linux/nfs2.h> 17#include <linux/nfs3.h> 18#include <linux/nfs4.h> 19#include <linux/sunrpc/svc.h> 20#include <linux/sunrpc/svc_xprt.h> 21#include <linux/sunrpc/msg_prot.h> 22#include <linux/sunrpc/addr.h> 23 24#include <uapi/linux/nfsd/debug.h> 25 26#include "netns.h" 27#include "stats.h" 28#include "export.h" 29 30#undef ifdebug 31#ifdef CONFIG_SUNRPC_DEBUG 32# define ifdebug(flag) if (nfsd_debug & NFSDDBG_##flag) 33#else 34# define ifdebug(flag) if (0) 35#endif 36 37/* 38 * nfsd version 39 */ 40#define NFSD_SUPPORTED_MINOR_VERSION 2 41/* 42 * Maximum blocksizes supported by daemon under various circumstances. 43 */ 44#define NFSSVC_MAXBLKSIZE RPCSVC_MAXPAYLOAD 45/* NFSv2 is limited by the protocol specification, see RFC 1094 */ 46#define NFSSVC_MAXBLKSIZE_V2 (8*1024) 47 48 49/* 50 * Largest number of bytes we need to allocate for an NFS 51 * call or reply. Used to control buffer sizes. We use 52 * the length of v3 WRITE, READDIR and READDIR replies 53 * which are an RPC header, up to 26 XDR units of reply 54 * data, and some page data. 55 * 56 * Note that accuracy here doesn't matter too much as the 57 * size is rounded up to a page size when allocating space. 58 */ 59#define NFSD_BUFSIZE ((RPC_MAX_HEADER_WITH_AUTH+26)*XDR_UNIT + NFSSVC_MAXBLKSIZE) 60 61struct readdir_cd { 62 __be32 err; /* 0, nfserr, or nfserr_eof */ 63}; 64 65 66extern struct svc_program nfsd_program; 67extern const struct svc_version nfsd_version2, nfsd_version3, 68 nfsd_version4; 69extern struct mutex nfsd_mutex; 70extern spinlock_t nfsd_drc_lock; 71extern unsigned long nfsd_drc_max_mem; 72extern unsigned long nfsd_drc_mem_used; 73 74extern const struct seq_operations nfs_exports_op; 75 76/* 77 * Function prototypes. 78 */ 79int nfsd_svc(int nrservs, struct net *net, const struct cred *cred); 80int nfsd_dispatch(struct svc_rqst *rqstp, __be32 *statp); 81 82int nfsd_nrthreads(struct net *); 83int nfsd_nrpools(struct net *); 84int nfsd_get_nrthreads(int n, int *, struct net *); 85int nfsd_set_nrthreads(int n, int *, struct net *); 86int nfsd_pool_stats_open(struct inode *, struct file *); 87int nfsd_pool_stats_release(struct inode *, struct file *); 88void nfsd_shutdown_threads(struct net *net); 89 90void nfsd_destroy(struct net *net); 91 92bool i_am_nfsd(void); 93 94struct nfsdfs_client { 95 struct kref cl_ref; 96 void (*cl_release)(struct kref *kref); 97}; 98 99struct nfsdfs_client *get_nfsdfs_client(struct inode *); 100struct dentry *nfsd_client_mkdir(struct nfsd_net *nn, 101 struct nfsdfs_client *ncl, u32 id, const struct tree_descr *); 102void nfsd_client_rmdir(struct dentry *dentry); 103 104 105#if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL) 106#ifdef CONFIG_NFSD_V2_ACL 107extern const struct svc_version nfsd_acl_version2; 108#else 109#define nfsd_acl_version2 NULL 110#endif 111#ifdef CONFIG_NFSD_V3_ACL 112extern const struct svc_version nfsd_acl_version3; 113#else 114#define nfsd_acl_version3 NULL 115#endif 116#endif 117 118struct nfsd_net; 119 120enum vers_op {NFSD_SET, NFSD_CLEAR, NFSD_TEST, NFSD_AVAIL }; 121int nfsd_vers(struct nfsd_net *nn, int vers, enum vers_op change); 122int nfsd_minorversion(struct nfsd_net *nn, u32 minorversion, enum vers_op change); 123void nfsd_reset_versions(struct nfsd_net *nn); 124int nfsd_create_serv(struct net *net); 125 126extern int nfsd_max_blksize; 127 128static inline int nfsd_v4client(struct svc_rqst *rq) 129{ 130 return rq->rq_prog == NFS_PROGRAM && rq->rq_vers == 4; 131} 132static inline struct user_namespace * 133nfsd_user_namespace(const struct svc_rqst *rqstp) 134{ 135 const struct cred *cred = rqstp->rq_xprt->xpt_cred; 136 return cred ? cred->user_ns : &init_user_ns; 137} 138 139/* 140 * NFSv4 State 141 */ 142#ifdef CONFIG_NFSD_V4 143extern unsigned long max_delegations; 144int nfsd4_init_slabs(void); 145void nfsd4_free_slabs(void); 146int nfs4_state_start(void); 147int nfs4_state_start_net(struct net *net); 148void nfs4_state_shutdown(void); 149void nfs4_state_shutdown_net(struct net *net); 150int nfs4_reset_recoverydir(char *recdir); 151char * nfs4_recoverydir(void); 152bool nfsd4_spo_must_allow(struct svc_rqst *rqstp); 153#else 154static inline int nfsd4_init_slabs(void) { return 0; } 155static inline void nfsd4_free_slabs(void) { } 156static inline int nfs4_state_start(void) { return 0; } 157static inline int nfs4_state_start_net(struct net *net) { return 0; } 158static inline void nfs4_state_shutdown(void) { } 159static inline void nfs4_state_shutdown_net(struct net *net) { } 160static inline int nfs4_reset_recoverydir(char *recdir) { return 0; } 161static inline char * nfs4_recoverydir(void) {return NULL; } 162static inline bool nfsd4_spo_must_allow(struct svc_rqst *rqstp) 163{ 164 return false; 165} 166#endif 167 168/* 169 * lockd binding 170 */ 171void nfsd_lockd_init(void); 172void nfsd_lockd_shutdown(void); 173 174 175/* 176 * These macros provide pre-xdr'ed values for faster operation. 177 */ 178#define nfs_ok cpu_to_be32(NFS_OK) 179#define nfserr_perm cpu_to_be32(NFSERR_PERM) 180#define nfserr_noent cpu_to_be32(NFSERR_NOENT) 181#define nfserr_io cpu_to_be32(NFSERR_IO) 182#define nfserr_nxio cpu_to_be32(NFSERR_NXIO) 183#define nfserr_eagain cpu_to_be32(NFSERR_EAGAIN) 184#define nfserr_acces cpu_to_be32(NFSERR_ACCES) 185#define nfserr_exist cpu_to_be32(NFSERR_EXIST) 186#define nfserr_xdev cpu_to_be32(NFSERR_XDEV) 187#define nfserr_nodev cpu_to_be32(NFSERR_NODEV) 188#define nfserr_notdir cpu_to_be32(NFSERR_NOTDIR) 189#define nfserr_isdir cpu_to_be32(NFSERR_ISDIR) 190#define nfserr_inval cpu_to_be32(NFSERR_INVAL) 191#define nfserr_fbig cpu_to_be32(NFSERR_FBIG) 192#define nfserr_nospc cpu_to_be32(NFSERR_NOSPC) 193#define nfserr_rofs cpu_to_be32(NFSERR_ROFS) 194#define nfserr_mlink cpu_to_be32(NFSERR_MLINK) 195#define nfserr_opnotsupp cpu_to_be32(NFSERR_OPNOTSUPP) 196#define nfserr_nametoolong cpu_to_be32(NFSERR_NAMETOOLONG) 197#define nfserr_notempty cpu_to_be32(NFSERR_NOTEMPTY) 198#define nfserr_dquot cpu_to_be32(NFSERR_DQUOT) 199#define nfserr_stale cpu_to_be32(NFSERR_STALE) 200#define nfserr_remote cpu_to_be32(NFSERR_REMOTE) 201#define nfserr_wflush cpu_to_be32(NFSERR_WFLUSH) 202#define nfserr_badhandle cpu_to_be32(NFSERR_BADHANDLE) 203#define nfserr_notsync cpu_to_be32(NFSERR_NOT_SYNC) 204#define nfserr_badcookie cpu_to_be32(NFSERR_BAD_COOKIE) 205#define nfserr_notsupp cpu_to_be32(NFSERR_NOTSUPP) 206#define nfserr_toosmall cpu_to_be32(NFSERR_TOOSMALL) 207#define nfserr_serverfault cpu_to_be32(NFSERR_SERVERFAULT) 208#define nfserr_badtype cpu_to_be32(NFSERR_BADTYPE) 209#define nfserr_jukebox cpu_to_be32(NFSERR_JUKEBOX) 210#define nfserr_denied cpu_to_be32(NFSERR_DENIED) 211#define nfserr_deadlock cpu_to_be32(NFSERR_DEADLOCK) 212#define nfserr_expired cpu_to_be32(NFSERR_EXPIRED) 213#define nfserr_bad_cookie cpu_to_be32(NFSERR_BAD_COOKIE) 214#define nfserr_same cpu_to_be32(NFSERR_SAME) 215#define nfserr_clid_inuse cpu_to_be32(NFSERR_CLID_INUSE) 216#define nfserr_stale_clientid cpu_to_be32(NFSERR_STALE_CLIENTID) 217#define nfserr_resource cpu_to_be32(NFSERR_RESOURCE) 218#define nfserr_moved cpu_to_be32(NFSERR_MOVED) 219#define nfserr_nofilehandle cpu_to_be32(NFSERR_NOFILEHANDLE) 220#define nfserr_minor_vers_mismatch cpu_to_be32(NFSERR_MINOR_VERS_MISMATCH) 221#define nfserr_share_denied cpu_to_be32(NFSERR_SHARE_DENIED) 222#define nfserr_stale_stateid cpu_to_be32(NFSERR_STALE_STATEID) 223#define nfserr_old_stateid cpu_to_be32(NFSERR_OLD_STATEID) 224#define nfserr_bad_stateid cpu_to_be32(NFSERR_BAD_STATEID) 225#define nfserr_bad_seqid cpu_to_be32(NFSERR_BAD_SEQID) 226#define nfserr_symlink cpu_to_be32(NFSERR_SYMLINK) 227#define nfserr_not_same cpu_to_be32(NFSERR_NOT_SAME) 228#define nfserr_lock_range cpu_to_be32(NFSERR_LOCK_RANGE) 229#define nfserr_restorefh cpu_to_be32(NFSERR_RESTOREFH) 230#define nfserr_attrnotsupp cpu_to_be32(NFSERR_ATTRNOTSUPP) 231#define nfserr_bad_xdr cpu_to_be32(NFSERR_BAD_XDR) 232#define nfserr_openmode cpu_to_be32(NFSERR_OPENMODE) 233#define nfserr_badowner cpu_to_be32(NFSERR_BADOWNER) 234#define nfserr_locks_held cpu_to_be32(NFSERR_LOCKS_HELD) 235#define nfserr_op_illegal cpu_to_be32(NFSERR_OP_ILLEGAL) 236#define nfserr_grace cpu_to_be32(NFSERR_GRACE) 237#define nfserr_no_grace cpu_to_be32(NFSERR_NO_GRACE) 238#define nfserr_reclaim_bad cpu_to_be32(NFSERR_RECLAIM_BAD) 239#define nfserr_badname cpu_to_be32(NFSERR_BADNAME) 240#define nfserr_cb_path_down cpu_to_be32(NFSERR_CB_PATH_DOWN) 241#define nfserr_locked cpu_to_be32(NFSERR_LOCKED) 242#define nfserr_wrongsec cpu_to_be32(NFSERR_WRONGSEC) 243#define nfserr_badiomode cpu_to_be32(NFS4ERR_BADIOMODE) 244#define nfserr_badlayout cpu_to_be32(NFS4ERR_BADLAYOUT) 245#define nfserr_bad_session_digest cpu_to_be32(NFS4ERR_BAD_SESSION_DIGEST) 246#define nfserr_badsession cpu_to_be32(NFS4ERR_BADSESSION) 247#define nfserr_badslot cpu_to_be32(NFS4ERR_BADSLOT) 248#define nfserr_complete_already cpu_to_be32(NFS4ERR_COMPLETE_ALREADY) 249#define nfserr_conn_not_bound_to_session cpu_to_be32(NFS4ERR_CONN_NOT_BOUND_TO_SESSION) 250#define nfserr_deleg_already_wanted cpu_to_be32(NFS4ERR_DELEG_ALREADY_WANTED) 251#define nfserr_back_chan_busy cpu_to_be32(NFS4ERR_BACK_CHAN_BUSY) 252#define nfserr_layouttrylater cpu_to_be32(NFS4ERR_LAYOUTTRYLATER) 253#define nfserr_layoutunavailable cpu_to_be32(NFS4ERR_LAYOUTUNAVAILABLE) 254#define nfserr_nomatching_layout cpu_to_be32(NFS4ERR_NOMATCHING_LAYOUT) 255#define nfserr_recallconflict cpu_to_be32(NFS4ERR_RECALLCONFLICT) 256#define nfserr_unknown_layouttype cpu_to_be32(NFS4ERR_UNKNOWN_LAYOUTTYPE) 257#define nfserr_seq_misordered cpu_to_be32(NFS4ERR_SEQ_MISORDERED) 258#define nfserr_sequence_pos cpu_to_be32(NFS4ERR_SEQUENCE_POS) 259#define nfserr_req_too_big cpu_to_be32(NFS4ERR_REQ_TOO_BIG) 260#define nfserr_rep_too_big cpu_to_be32(NFS4ERR_REP_TOO_BIG) 261#define nfserr_rep_too_big_to_cache cpu_to_be32(NFS4ERR_REP_TOO_BIG_TO_CACHE) 262#define nfserr_retry_uncached_rep cpu_to_be32(NFS4ERR_RETRY_UNCACHED_REP) 263#define nfserr_unsafe_compound cpu_to_be32(NFS4ERR_UNSAFE_COMPOUND) 264#define nfserr_too_many_ops cpu_to_be32(NFS4ERR_TOO_MANY_OPS) 265#define nfserr_op_not_in_session cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION) 266#define nfserr_hash_alg_unsupp cpu_to_be32(NFS4ERR_HASH_ALG_UNSUPP) 267#define nfserr_clientid_busy cpu_to_be32(NFS4ERR_CLIENTID_BUSY) 268#define nfserr_pnfs_io_hole cpu_to_be32(NFS4ERR_PNFS_IO_HOLE) 269#define nfserr_seq_false_retry cpu_to_be32(NFS4ERR_SEQ_FALSE_RETRY) 270#define nfserr_bad_high_slot cpu_to_be32(NFS4ERR_BAD_HIGH_SLOT) 271#define nfserr_deadsession cpu_to_be32(NFS4ERR_DEADSESSION) 272#define nfserr_encr_alg_unsupp cpu_to_be32(NFS4ERR_ENCR_ALG_UNSUPP) 273#define nfserr_pnfs_no_layout cpu_to_be32(NFS4ERR_PNFS_NO_LAYOUT) 274#define nfserr_not_only_op cpu_to_be32(NFS4ERR_NOT_ONLY_OP) 275#define nfserr_wrong_cred cpu_to_be32(NFS4ERR_WRONG_CRED) 276#define nfserr_wrong_type cpu_to_be32(NFS4ERR_WRONG_TYPE) 277#define nfserr_dirdeleg_unavail cpu_to_be32(NFS4ERR_DIRDELEG_UNAVAIL) 278#define nfserr_reject_deleg cpu_to_be32(NFS4ERR_REJECT_DELEG) 279#define nfserr_returnconflict cpu_to_be32(NFS4ERR_RETURNCONFLICT) 280#define nfserr_deleg_revoked cpu_to_be32(NFS4ERR_DELEG_REVOKED) 281#define nfserr_partner_notsupp cpu_to_be32(NFS4ERR_PARTNER_NOTSUPP) 282#define nfserr_partner_no_auth cpu_to_be32(NFS4ERR_PARTNER_NO_AUTH) 283#define nfserr_union_notsupp cpu_to_be32(NFS4ERR_UNION_NOTSUPP) 284#define nfserr_offload_denied cpu_to_be32(NFS4ERR_OFFLOAD_DENIED) 285#define nfserr_wrong_lfs cpu_to_be32(NFS4ERR_WRONG_LFS) 286#define nfserr_badlabel cpu_to_be32(NFS4ERR_BADLABEL) 287#define nfserr_file_open cpu_to_be32(NFS4ERR_FILE_OPEN) 288#define nfserr_xattr2big cpu_to_be32(NFS4ERR_XATTR2BIG) 289#define nfserr_noxattr cpu_to_be32(NFS4ERR_NOXATTR) 290 291/* error codes for internal use */ 292/* if a request fails due to kmalloc failure, it gets dropped. 293 * Client should resend eventually 294 */ 295#define nfserr_dropit cpu_to_be32(30000) 296/* end-of-file indicator in readdir */ 297#define nfserr_eof cpu_to_be32(30001) 298/* replay detected */ 299#define nfserr_replay_me cpu_to_be32(11001) 300/* nfs41 replay detected */ 301#define nfserr_replay_cache cpu_to_be32(11002) 302 303/* Check for dir entries '.' and '..' */ 304#define isdotent(n, l) (l < 3 && n[0] == '.' && (l == 1 || n[1] == '.')) 305 306#ifdef CONFIG_NFSD_V4 307 308/* before processing a COMPOUND operation, we have to check that there 309 * is enough space in the buffer for XDR encode to succeed. otherwise, 310 * we might process an operation with side effects, and be unable to 311 * tell the client that the operation succeeded. 312 * 313 * COMPOUND_SLACK_SPACE - this is the minimum bytes of buffer space 314 * needed to encode an "ordinary" _successful_ operation. (GETATTR, 315 * READ, READDIR, and READLINK have their own buffer checks.) if we 316 * fall below this level, we fail the next operation with NFS4ERR_RESOURCE. 317 * 318 * COMPOUND_ERR_SLACK_SPACE - this is the minimum bytes of buffer space 319 * needed to encode an operation which has failed with NFS4ERR_RESOURCE. 320 * care is taken to ensure that we never fall below this level for any 321 * reason. 322 */ 323#define COMPOUND_SLACK_SPACE 140 /* OP_GETFH */ 324#define COMPOUND_ERR_SLACK_SPACE 16 /* OP_SETATTR */ 325 326#define NFSD_LAUNDROMAT_MINTIMEOUT 1 /* seconds */ 327 328/* 329 * The following attributes are currently not supported by the NFSv4 server: 330 * ARCHIVE (deprecated anyway) 331 * HIDDEN (unlikely to be supported any time soon) 332 * MIMETYPE (unlikely to be supported any time soon) 333 * QUOTA_* (will be supported in a forthcoming patch) 334 * SYSTEM (unlikely to be supported any time soon) 335 * TIME_BACKUP (unlikely to be supported any time soon) 336 * TIME_CREATE (unlikely to be supported any time soon) 337 */ 338#define NFSD4_SUPPORTED_ATTRS_WORD0 \ 339(FATTR4_WORD0_SUPPORTED_ATTRS | FATTR4_WORD0_TYPE | FATTR4_WORD0_FH_EXPIRE_TYPE \ 340 | FATTR4_WORD0_CHANGE | FATTR4_WORD0_SIZE | FATTR4_WORD0_LINK_SUPPORT \ 341 | FATTR4_WORD0_SYMLINK_SUPPORT | FATTR4_WORD0_NAMED_ATTR | FATTR4_WORD0_FSID \ 342 | FATTR4_WORD0_UNIQUE_HANDLES | FATTR4_WORD0_LEASE_TIME | FATTR4_WORD0_RDATTR_ERROR \ 343 | FATTR4_WORD0_ACLSUPPORT | FATTR4_WORD0_CANSETTIME | FATTR4_WORD0_CASE_INSENSITIVE \ 344 | FATTR4_WORD0_CASE_PRESERVING | FATTR4_WORD0_CHOWN_RESTRICTED \ 345 | FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FILEID | FATTR4_WORD0_FILES_AVAIL \ 346 | FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_HOMOGENEOUS \ 347 | FATTR4_WORD0_MAXFILESIZE | FATTR4_WORD0_MAXLINK | FATTR4_WORD0_MAXNAME \ 348 | FATTR4_WORD0_MAXREAD | FATTR4_WORD0_MAXWRITE | FATTR4_WORD0_ACL) 349 350#define NFSD4_SUPPORTED_ATTRS_WORD1 \ 351(FATTR4_WORD1_MODE | FATTR4_WORD1_NO_TRUNC | FATTR4_WORD1_NUMLINKS \ 352 | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP | FATTR4_WORD1_RAWDEV \ 353 | FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | FATTR4_WORD1_SPACE_TOTAL \ 354 | FATTR4_WORD1_SPACE_USED | FATTR4_WORD1_TIME_ACCESS | FATTR4_WORD1_TIME_ACCESS_SET \ 355 | FATTR4_WORD1_TIME_DELTA | FATTR4_WORD1_TIME_METADATA \ 356 | FATTR4_WORD1_TIME_MODIFY | FATTR4_WORD1_TIME_MODIFY_SET | FATTR4_WORD1_MOUNTED_ON_FILEID) 357 358#define NFSD4_SUPPORTED_ATTRS_WORD2 0 359 360/* 4.1 */ 361#ifdef CONFIG_NFSD_PNFS 362#define PNFSD_SUPPORTED_ATTRS_WORD1 FATTR4_WORD1_FS_LAYOUT_TYPES 363#define PNFSD_SUPPORTED_ATTRS_WORD2 \ 364(FATTR4_WORD2_LAYOUT_BLKSIZE | FATTR4_WORD2_LAYOUT_TYPES) 365#else 366#define PNFSD_SUPPORTED_ATTRS_WORD1 0 367#define PNFSD_SUPPORTED_ATTRS_WORD2 0 368#endif /* CONFIG_NFSD_PNFS */ 369 370#define NFSD4_1_SUPPORTED_ATTRS_WORD0 \ 371 NFSD4_SUPPORTED_ATTRS_WORD0 372 373#define NFSD4_1_SUPPORTED_ATTRS_WORD1 \ 374 (NFSD4_SUPPORTED_ATTRS_WORD1 | PNFSD_SUPPORTED_ATTRS_WORD1) 375 376#define NFSD4_1_SUPPORTED_ATTRS_WORD2 \ 377 (NFSD4_SUPPORTED_ATTRS_WORD2 | PNFSD_SUPPORTED_ATTRS_WORD2 | \ 378 FATTR4_WORD2_SUPPATTR_EXCLCREAT) 379 380/* 4.2 */ 381#ifdef CONFIG_NFSD_V4_SECURITY_LABEL 382#define NFSD4_2_SECURITY_ATTRS FATTR4_WORD2_SECURITY_LABEL 383#else 384#define NFSD4_2_SECURITY_ATTRS 0 385#endif 386 387#define NFSD4_2_SUPPORTED_ATTRS_WORD2 \ 388 (NFSD4_1_SUPPORTED_ATTRS_WORD2 | \ 389 FATTR4_WORD2_CHANGE_ATTR_TYPE | \ 390 FATTR4_WORD2_MODE_UMASK | \ 391 NFSD4_2_SECURITY_ATTRS | \ 392 FATTR4_WORD2_XATTR_SUPPORT) 393 394extern const u32 nfsd_suppattrs[3][3]; 395 396static inline __be32 nfsd4_set_netaddr(struct sockaddr *addr, 397 struct nfs42_netaddr *netaddr) 398{ 399 struct sockaddr_in *sin = (struct sockaddr_in *)addr; 400 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr; 401 unsigned int port; 402 size_t ret_addr, ret_port; 403 404 switch (addr->sa_family) { 405 case AF_INET: 406 port = ntohs(sin->sin_port); 407 sprintf(netaddr->netid, "tcp"); 408 netaddr->netid_len = 3; 409 break; 410 case AF_INET6: 411 port = ntohs(sin6->sin6_port); 412 sprintf(netaddr->netid, "tcp6"); 413 netaddr->netid_len = 4; 414 break; 415 default: 416 return nfserr_inval; 417 } 418 ret_addr = rpc_ntop(addr, netaddr->addr, sizeof(netaddr->addr)); 419 ret_port = snprintf(netaddr->addr + ret_addr, 420 RPCBIND_MAXUADDRLEN + 1 - ret_addr, 421 ".%u.%u", port >> 8, port & 0xff); 422 WARN_ON(ret_port >= RPCBIND_MAXUADDRLEN + 1 - ret_addr); 423 netaddr->addr_len = ret_addr + ret_port; 424 return 0; 425} 426 427static inline bool bmval_is_subset(const u32 *bm1, const u32 *bm2) 428{ 429 return !((bm1[0] & ~bm2[0]) || 430 (bm1[1] & ~bm2[1]) || 431 (bm1[2] & ~bm2[2])); 432} 433 434static inline bool nfsd_attrs_supported(u32 minorversion, const u32 *bmval) 435{ 436 return bmval_is_subset(bmval, nfsd_suppattrs[minorversion]); 437} 438 439/* These will return ERR_INVAL if specified in GETATTR or READDIR. */ 440#define NFSD_WRITEONLY_ATTRS_WORD1 \ 441 (FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET) 442 443/* 444 * These are the only attrs allowed in CREATE/OPEN/SETATTR. Don't add 445 * a writeable attribute here without also adding code to parse it to 446 * nfsd4_decode_fattr(). 447 */ 448#define NFSD_WRITEABLE_ATTRS_WORD0 \ 449 (FATTR4_WORD0_SIZE | FATTR4_WORD0_ACL) 450#define NFSD_WRITEABLE_ATTRS_WORD1 \ 451 (FATTR4_WORD1_MODE | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP \ 452 | FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET) 453#ifdef CONFIG_NFSD_V4_SECURITY_LABEL 454#define MAYBE_FATTR4_WORD2_SECURITY_LABEL \ 455 FATTR4_WORD2_SECURITY_LABEL 456#else 457#define MAYBE_FATTR4_WORD2_SECURITY_LABEL 0 458#endif 459#define NFSD_WRITEABLE_ATTRS_WORD2 \ 460 (FATTR4_WORD2_MODE_UMASK \ 461 | MAYBE_FATTR4_WORD2_SECURITY_LABEL) 462 463#define NFSD_SUPPATTR_EXCLCREAT_WORD0 \ 464 NFSD_WRITEABLE_ATTRS_WORD0 465/* 466 * we currently store the exclusive create verifier in the v_{a,m}time 467 * attributes so the client can't set these at create time using EXCLUSIVE4_1 468 */ 469#define NFSD_SUPPATTR_EXCLCREAT_WORD1 \ 470 (NFSD_WRITEABLE_ATTRS_WORD1 & \ 471 ~(FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET)) 472#define NFSD_SUPPATTR_EXCLCREAT_WORD2 \ 473 NFSD_WRITEABLE_ATTRS_WORD2 474 475extern int nfsd4_is_junction(struct dentry *dentry); 476extern int register_cld_notifier(void); 477extern void unregister_cld_notifier(void); 478#else /* CONFIG_NFSD_V4 */ 479static inline int nfsd4_is_junction(struct dentry *dentry) 480{ 481 return 0; 482} 483 484#define register_cld_notifier() 0 485#define unregister_cld_notifier() do { } while(0) 486 487#endif /* CONFIG_NFSD_V4 */ 488 489#endif /* LINUX_NFSD_NFSD_H */ 490