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 "export.h" 28#include "stats.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/* Maximum number of operations per session compound */ 66#define NFSD_MAX_OPS_PER_COMPOUND 50 67 68struct nfsd_genl_rqstp { 69 struct sockaddr rq_daddr; 70 struct sockaddr rq_saddr; 71 unsigned long rq_flags; 72 ktime_t rq_stime; 73 __be32 rq_xid; 74 u32 rq_vers; 75 u32 rq_prog; 76 u32 rq_proc; 77 78 /* NFSv4 compound */ 79 u32 rq_opcnt; 80 u32 rq_opnum[NFSD_MAX_OPS_PER_COMPOUND]; 81}; 82 83extern struct svc_program nfsd_program; 84extern const struct svc_version nfsd_version2, nfsd_version3, nfsd_version4; 85extern struct mutex nfsd_mutex; 86extern spinlock_t nfsd_drc_lock; 87extern unsigned long nfsd_drc_max_mem; 88extern unsigned long nfsd_drc_mem_used; 89extern atomic_t nfsd_th_cnt; /* number of available threads */ 90 91extern const struct seq_operations nfs_exports_op; 92 93/* 94 * Common void argument and result helpers 95 */ 96struct nfsd_voidargs { }; 97struct nfsd_voidres { }; 98bool nfssvc_decode_voidarg(struct svc_rqst *rqstp, 99 struct xdr_stream *xdr); 100bool nfssvc_encode_voidres(struct svc_rqst *rqstp, 101 struct xdr_stream *xdr); 102 103/* 104 * Function prototypes. 105 */ 106int nfsd_svc(int nrservs, struct net *net, const struct cred *cred); 107int nfsd_dispatch(struct svc_rqst *rqstp); 108 109int nfsd_nrthreads(struct net *); 110int nfsd_nrpools(struct net *); 111int nfsd_get_nrthreads(int n, int *, struct net *); 112int nfsd_set_nrthreads(int n, int *, struct net *); 113int nfsd_pool_stats_open(struct inode *, struct file *); 114int nfsd_pool_stats_release(struct inode *, struct file *); 115void nfsd_shutdown_threads(struct net *net); 116 117bool i_am_nfsd(void); 118 119struct nfsdfs_client { 120 struct kref cl_ref; 121 void (*cl_release)(struct kref *kref); 122}; 123 124struct nfsdfs_client *get_nfsdfs_client(struct inode *); 125struct dentry *nfsd_client_mkdir(struct nfsd_net *nn, 126 struct nfsdfs_client *ncl, u32 id, 127 const struct tree_descr *, 128 struct dentry **fdentries); 129void nfsd_client_rmdir(struct dentry *dentry); 130 131 132#if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL) 133#ifdef CONFIG_NFSD_V2_ACL 134extern const struct svc_version nfsd_acl_version2; 135#else 136#define nfsd_acl_version2 NULL 137#endif 138#ifdef CONFIG_NFSD_V3_ACL 139extern const struct svc_version nfsd_acl_version3; 140#else 141#define nfsd_acl_version3 NULL 142#endif 143#endif 144 145struct nfsd_net; 146 147enum vers_op {NFSD_SET, NFSD_CLEAR, NFSD_TEST, NFSD_AVAIL }; 148int nfsd_vers(struct nfsd_net *nn, int vers, enum vers_op change); 149int nfsd_minorversion(struct nfsd_net *nn, u32 minorversion, enum vers_op change); 150void nfsd_reset_versions(struct nfsd_net *nn); 151int nfsd_create_serv(struct net *net); 152void nfsd_destroy_serv(struct net *net); 153 154extern int nfsd_max_blksize; 155 156static inline int nfsd_v4client(struct svc_rqst *rq) 157{ 158 return rq->rq_prog == NFS_PROGRAM && rq->rq_vers == 4; 159} 160static inline struct user_namespace * 161nfsd_user_namespace(const struct svc_rqst *rqstp) 162{ 163 const struct cred *cred = rqstp->rq_xprt->xpt_cred; 164 return cred ? cred->user_ns : &init_user_ns; 165} 166 167/* 168 * NFSv4 State 169 */ 170#ifdef CONFIG_NFSD_V4 171extern unsigned long max_delegations; 172int nfsd4_init_slabs(void); 173void nfsd4_free_slabs(void); 174int nfs4_state_start(void); 175int nfs4_state_start_net(struct net *net); 176void nfs4_state_shutdown(void); 177void nfs4_state_shutdown_net(struct net *net); 178int nfs4_reset_recoverydir(char *recdir); 179char * nfs4_recoverydir(void); 180bool nfsd4_spo_must_allow(struct svc_rqst *rqstp); 181int nfsd4_create_laundry_wq(void); 182void nfsd4_destroy_laundry_wq(void); 183bool nfsd_wait_for_delegreturn(struct svc_rqst *rqstp, struct inode *inode); 184#else 185static inline int nfsd4_init_slabs(void) { return 0; } 186static inline void nfsd4_free_slabs(void) { } 187static inline int nfs4_state_start(void) { return 0; } 188static inline int nfs4_state_start_net(struct net *net) { return 0; } 189static inline void nfs4_state_shutdown(void) { } 190static inline void nfs4_state_shutdown_net(struct net *net) { } 191static inline int nfs4_reset_recoverydir(char *recdir) { return 0; } 192static inline char * nfs4_recoverydir(void) {return NULL; } 193static inline bool nfsd4_spo_must_allow(struct svc_rqst *rqstp) 194{ 195 return false; 196} 197static inline int nfsd4_create_laundry_wq(void) { return 0; }; 198static inline void nfsd4_destroy_laundry_wq(void) {}; 199static inline bool nfsd_wait_for_delegreturn(struct svc_rqst *rqstp, 200 struct inode *inode) 201{ 202 return false; 203} 204#endif 205 206/* 207 * lockd binding 208 */ 209void nfsd_lockd_init(void); 210void nfsd_lockd_shutdown(void); 211 212 213/* 214 * These macros provide pre-xdr'ed values for faster operation. 215 */ 216#define nfs_ok cpu_to_be32(NFS_OK) 217#define nfserr_perm cpu_to_be32(NFSERR_PERM) 218#define nfserr_noent cpu_to_be32(NFSERR_NOENT) 219#define nfserr_io cpu_to_be32(NFSERR_IO) 220#define nfserr_nxio cpu_to_be32(NFSERR_NXIO) 221#define nfserr_eagain cpu_to_be32(NFSERR_EAGAIN) 222#define nfserr_acces cpu_to_be32(NFSERR_ACCES) 223#define nfserr_exist cpu_to_be32(NFSERR_EXIST) 224#define nfserr_xdev cpu_to_be32(NFSERR_XDEV) 225#define nfserr_nodev cpu_to_be32(NFSERR_NODEV) 226#define nfserr_notdir cpu_to_be32(NFSERR_NOTDIR) 227#define nfserr_isdir cpu_to_be32(NFSERR_ISDIR) 228#define nfserr_inval cpu_to_be32(NFSERR_INVAL) 229#define nfserr_fbig cpu_to_be32(NFSERR_FBIG) 230#define nfserr_nospc cpu_to_be32(NFSERR_NOSPC) 231#define nfserr_rofs cpu_to_be32(NFSERR_ROFS) 232#define nfserr_mlink cpu_to_be32(NFSERR_MLINK) 233#define nfserr_opnotsupp cpu_to_be32(NFSERR_OPNOTSUPP) 234#define nfserr_nametoolong cpu_to_be32(NFSERR_NAMETOOLONG) 235#define nfserr_notempty cpu_to_be32(NFSERR_NOTEMPTY) 236#define nfserr_dquot cpu_to_be32(NFSERR_DQUOT) 237#define nfserr_stale cpu_to_be32(NFSERR_STALE) 238#define nfserr_remote cpu_to_be32(NFSERR_REMOTE) 239#define nfserr_wflush cpu_to_be32(NFSERR_WFLUSH) 240#define nfserr_badhandle cpu_to_be32(NFSERR_BADHANDLE) 241#define nfserr_notsync cpu_to_be32(NFSERR_NOT_SYNC) 242#define nfserr_badcookie cpu_to_be32(NFSERR_BAD_COOKIE) 243#define nfserr_notsupp cpu_to_be32(NFSERR_NOTSUPP) 244#define nfserr_toosmall cpu_to_be32(NFSERR_TOOSMALL) 245#define nfserr_serverfault cpu_to_be32(NFSERR_SERVERFAULT) 246#define nfserr_badtype cpu_to_be32(NFSERR_BADTYPE) 247#define nfserr_jukebox cpu_to_be32(NFSERR_JUKEBOX) 248#define nfserr_denied cpu_to_be32(NFSERR_DENIED) 249#define nfserr_deadlock cpu_to_be32(NFSERR_DEADLOCK) 250#define nfserr_expired cpu_to_be32(NFSERR_EXPIRED) 251#define nfserr_bad_cookie cpu_to_be32(NFSERR_BAD_COOKIE) 252#define nfserr_same cpu_to_be32(NFSERR_SAME) 253#define nfserr_clid_inuse cpu_to_be32(NFSERR_CLID_INUSE) 254#define nfserr_stale_clientid cpu_to_be32(NFSERR_STALE_CLIENTID) 255#define nfserr_resource cpu_to_be32(NFSERR_RESOURCE) 256#define nfserr_moved cpu_to_be32(NFSERR_MOVED) 257#define nfserr_nofilehandle cpu_to_be32(NFSERR_NOFILEHANDLE) 258#define nfserr_minor_vers_mismatch cpu_to_be32(NFSERR_MINOR_VERS_MISMATCH) 259#define nfserr_share_denied cpu_to_be32(NFSERR_SHARE_DENIED) 260#define nfserr_stale_stateid cpu_to_be32(NFSERR_STALE_STATEID) 261#define nfserr_old_stateid cpu_to_be32(NFSERR_OLD_STATEID) 262#define nfserr_bad_stateid cpu_to_be32(NFSERR_BAD_STATEID) 263#define nfserr_bad_seqid cpu_to_be32(NFSERR_BAD_SEQID) 264#define nfserr_symlink cpu_to_be32(NFSERR_SYMLINK) 265#define nfserr_not_same cpu_to_be32(NFSERR_NOT_SAME) 266#define nfserr_lock_range cpu_to_be32(NFSERR_LOCK_RANGE) 267#define nfserr_restorefh cpu_to_be32(NFSERR_RESTOREFH) 268#define nfserr_attrnotsupp cpu_to_be32(NFSERR_ATTRNOTSUPP) 269#define nfserr_bad_xdr cpu_to_be32(NFSERR_BAD_XDR) 270#define nfserr_openmode cpu_to_be32(NFSERR_OPENMODE) 271#define nfserr_badowner cpu_to_be32(NFSERR_BADOWNER) 272#define nfserr_locks_held cpu_to_be32(NFSERR_LOCKS_HELD) 273#define nfserr_op_illegal cpu_to_be32(NFSERR_OP_ILLEGAL) 274#define nfserr_grace cpu_to_be32(NFSERR_GRACE) 275#define nfserr_no_grace cpu_to_be32(NFSERR_NO_GRACE) 276#define nfserr_reclaim_bad cpu_to_be32(NFSERR_RECLAIM_BAD) 277#define nfserr_badname cpu_to_be32(NFSERR_BADNAME) 278#define nfserr_admin_revoked cpu_to_be32(NFS4ERR_ADMIN_REVOKED) 279#define nfserr_cb_path_down cpu_to_be32(NFSERR_CB_PATH_DOWN) 280#define nfserr_locked cpu_to_be32(NFSERR_LOCKED) 281#define nfserr_wrongsec cpu_to_be32(NFSERR_WRONGSEC) 282#define nfserr_badiomode cpu_to_be32(NFS4ERR_BADIOMODE) 283#define nfserr_badlayout cpu_to_be32(NFS4ERR_BADLAYOUT) 284#define nfserr_bad_session_digest cpu_to_be32(NFS4ERR_BAD_SESSION_DIGEST) 285#define nfserr_badsession cpu_to_be32(NFS4ERR_BADSESSION) 286#define nfserr_badslot cpu_to_be32(NFS4ERR_BADSLOT) 287#define nfserr_complete_already cpu_to_be32(NFS4ERR_COMPLETE_ALREADY) 288#define nfserr_conn_not_bound_to_session cpu_to_be32(NFS4ERR_CONN_NOT_BOUND_TO_SESSION) 289#define nfserr_deleg_already_wanted cpu_to_be32(NFS4ERR_DELEG_ALREADY_WANTED) 290#define nfserr_back_chan_busy cpu_to_be32(NFS4ERR_BACK_CHAN_BUSY) 291#define nfserr_layouttrylater cpu_to_be32(NFS4ERR_LAYOUTTRYLATER) 292#define nfserr_layoutunavailable cpu_to_be32(NFS4ERR_LAYOUTUNAVAILABLE) 293#define nfserr_nomatching_layout cpu_to_be32(NFS4ERR_NOMATCHING_LAYOUT) 294#define nfserr_recallconflict cpu_to_be32(NFS4ERR_RECALLCONFLICT) 295#define nfserr_unknown_layouttype cpu_to_be32(NFS4ERR_UNKNOWN_LAYOUTTYPE) 296#define nfserr_seq_misordered cpu_to_be32(NFS4ERR_SEQ_MISORDERED) 297#define nfserr_sequence_pos cpu_to_be32(NFS4ERR_SEQUENCE_POS) 298#define nfserr_req_too_big cpu_to_be32(NFS4ERR_REQ_TOO_BIG) 299#define nfserr_rep_too_big cpu_to_be32(NFS4ERR_REP_TOO_BIG) 300#define nfserr_rep_too_big_to_cache cpu_to_be32(NFS4ERR_REP_TOO_BIG_TO_CACHE) 301#define nfserr_retry_uncached_rep cpu_to_be32(NFS4ERR_RETRY_UNCACHED_REP) 302#define nfserr_unsafe_compound cpu_to_be32(NFS4ERR_UNSAFE_COMPOUND) 303#define nfserr_too_many_ops cpu_to_be32(NFS4ERR_TOO_MANY_OPS) 304#define nfserr_op_not_in_session cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION) 305#define nfserr_hash_alg_unsupp cpu_to_be32(NFS4ERR_HASH_ALG_UNSUPP) 306#define nfserr_clientid_busy cpu_to_be32(NFS4ERR_CLIENTID_BUSY) 307#define nfserr_pnfs_io_hole cpu_to_be32(NFS4ERR_PNFS_IO_HOLE) 308#define nfserr_seq_false_retry cpu_to_be32(NFS4ERR_SEQ_FALSE_RETRY) 309#define nfserr_bad_high_slot cpu_to_be32(NFS4ERR_BAD_HIGH_SLOT) 310#define nfserr_deadsession cpu_to_be32(NFS4ERR_DEADSESSION) 311#define nfserr_encr_alg_unsupp cpu_to_be32(NFS4ERR_ENCR_ALG_UNSUPP) 312#define nfserr_pnfs_no_layout cpu_to_be32(NFS4ERR_PNFS_NO_LAYOUT) 313#define nfserr_not_only_op cpu_to_be32(NFS4ERR_NOT_ONLY_OP) 314#define nfserr_wrong_cred cpu_to_be32(NFS4ERR_WRONG_CRED) 315#define nfserr_wrong_type cpu_to_be32(NFS4ERR_WRONG_TYPE) 316#define nfserr_dirdeleg_unavail cpu_to_be32(NFS4ERR_DIRDELEG_UNAVAIL) 317#define nfserr_reject_deleg cpu_to_be32(NFS4ERR_REJECT_DELEG) 318#define nfserr_returnconflict cpu_to_be32(NFS4ERR_RETURNCONFLICT) 319#define nfserr_deleg_revoked cpu_to_be32(NFS4ERR_DELEG_REVOKED) 320#define nfserr_partner_notsupp cpu_to_be32(NFS4ERR_PARTNER_NOTSUPP) 321#define nfserr_partner_no_auth cpu_to_be32(NFS4ERR_PARTNER_NO_AUTH) 322#define nfserr_union_notsupp cpu_to_be32(NFS4ERR_UNION_NOTSUPP) 323#define nfserr_offload_denied cpu_to_be32(NFS4ERR_OFFLOAD_DENIED) 324#define nfserr_wrong_lfs cpu_to_be32(NFS4ERR_WRONG_LFS) 325#define nfserr_badlabel cpu_to_be32(NFS4ERR_BADLABEL) 326#define nfserr_file_open cpu_to_be32(NFS4ERR_FILE_OPEN) 327#define nfserr_xattr2big cpu_to_be32(NFS4ERR_XATTR2BIG) 328#define nfserr_noxattr cpu_to_be32(NFS4ERR_NOXATTR) 329 330/* error codes for internal use */ 331/* if a request fails due to kmalloc failure, it gets dropped. 332 * Client should resend eventually 333 */ 334#define nfserr_dropit cpu_to_be32(30000) 335/* end-of-file indicator in readdir */ 336#define nfserr_eof cpu_to_be32(30001) 337/* replay detected */ 338#define nfserr_replay_me cpu_to_be32(11001) 339/* nfs41 replay detected */ 340#define nfserr_replay_cache cpu_to_be32(11002) 341 342/* Check for dir entries '.' and '..' */ 343#define isdotent(n, l) (l < 3 && n[0] == '.' && (l == 1 || n[1] == '.')) 344 345#ifdef CONFIG_NFSD_V4 346 347/* before processing a COMPOUND operation, we have to check that there 348 * is enough space in the buffer for XDR encode to succeed. otherwise, 349 * we might process an operation with side effects, and be unable to 350 * tell the client that the operation succeeded. 351 * 352 * COMPOUND_SLACK_SPACE - this is the minimum bytes of buffer space 353 * needed to encode an "ordinary" _successful_ operation. (GETATTR, 354 * READ, READDIR, and READLINK have their own buffer checks.) if we 355 * fall below this level, we fail the next operation with NFS4ERR_RESOURCE. 356 * 357 * COMPOUND_ERR_SLACK_SPACE - this is the minimum bytes of buffer space 358 * needed to encode an operation which has failed with NFS4ERR_RESOURCE. 359 * care is taken to ensure that we never fall below this level for any 360 * reason. 361 */ 362#define COMPOUND_SLACK_SPACE 140 /* OP_GETFH */ 363#define COMPOUND_ERR_SLACK_SPACE 16 /* OP_SETATTR */ 364 365#define NFSD_LAUNDROMAT_MINTIMEOUT 1 /* seconds */ 366#define NFSD_COURTESY_CLIENT_TIMEOUT (24 * 60 * 60) /* seconds */ 367#define NFSD_CLIENT_MAX_TRIM_PER_RUN 128 368#define NFS4_CLIENTS_PER_GB 1024 369#define NFSD_DELEGRETURN_TIMEOUT (HZ / 34) /* 30ms */ 370#define NFSD_CB_GETATTR_TIMEOUT NFSD_DELEGRETURN_TIMEOUT 371 372/* 373 * The following attributes are currently not supported by the NFSv4 server: 374 * ARCHIVE (deprecated anyway) 375 * HIDDEN (unlikely to be supported any time soon) 376 * MIMETYPE (unlikely to be supported any time soon) 377 * QUOTA_* (will be supported in a forthcoming patch) 378 * SYSTEM (unlikely to be supported any time soon) 379 * TIME_BACKUP (unlikely to be supported any time soon) 380 * TIME_CREATE (unlikely to be supported any time soon) 381 */ 382#define NFSD4_SUPPORTED_ATTRS_WORD0 \ 383(FATTR4_WORD0_SUPPORTED_ATTRS | FATTR4_WORD0_TYPE | FATTR4_WORD0_FH_EXPIRE_TYPE \ 384 | FATTR4_WORD0_CHANGE | FATTR4_WORD0_SIZE | FATTR4_WORD0_LINK_SUPPORT \ 385 | FATTR4_WORD0_SYMLINK_SUPPORT | FATTR4_WORD0_NAMED_ATTR | FATTR4_WORD0_FSID \ 386 | FATTR4_WORD0_UNIQUE_HANDLES | FATTR4_WORD0_LEASE_TIME | FATTR4_WORD0_RDATTR_ERROR \ 387 | FATTR4_WORD0_ACLSUPPORT | FATTR4_WORD0_CANSETTIME | FATTR4_WORD0_CASE_INSENSITIVE \ 388 | FATTR4_WORD0_CASE_PRESERVING | FATTR4_WORD0_CHOWN_RESTRICTED \ 389 | FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FILEID | FATTR4_WORD0_FILES_AVAIL \ 390 | FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_HOMOGENEOUS \ 391 | FATTR4_WORD0_MAXFILESIZE | FATTR4_WORD0_MAXLINK | FATTR4_WORD0_MAXNAME \ 392 | FATTR4_WORD0_MAXREAD | FATTR4_WORD0_MAXWRITE | FATTR4_WORD0_ACL) 393 394#define NFSD4_SUPPORTED_ATTRS_WORD1 \ 395(FATTR4_WORD1_MODE | FATTR4_WORD1_NO_TRUNC | FATTR4_WORD1_NUMLINKS \ 396 | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP | FATTR4_WORD1_RAWDEV \ 397 | FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | FATTR4_WORD1_SPACE_TOTAL \ 398 | FATTR4_WORD1_SPACE_USED | FATTR4_WORD1_TIME_ACCESS | FATTR4_WORD1_TIME_ACCESS_SET \ 399 | FATTR4_WORD1_TIME_DELTA | FATTR4_WORD1_TIME_METADATA | FATTR4_WORD1_TIME_CREATE \ 400 | FATTR4_WORD1_TIME_MODIFY | FATTR4_WORD1_TIME_MODIFY_SET | FATTR4_WORD1_MOUNTED_ON_FILEID) 401 402#define NFSD4_SUPPORTED_ATTRS_WORD2 0 403 404/* 4.1 */ 405#ifdef CONFIG_NFSD_PNFS 406#define PNFSD_SUPPORTED_ATTRS_WORD1 FATTR4_WORD1_FS_LAYOUT_TYPES 407#define PNFSD_SUPPORTED_ATTRS_WORD2 \ 408(FATTR4_WORD2_LAYOUT_BLKSIZE | FATTR4_WORD2_LAYOUT_TYPES) 409#else 410#define PNFSD_SUPPORTED_ATTRS_WORD1 0 411#define PNFSD_SUPPORTED_ATTRS_WORD2 0 412#endif /* CONFIG_NFSD_PNFS */ 413 414#define NFSD4_1_SUPPORTED_ATTRS_WORD0 \ 415 NFSD4_SUPPORTED_ATTRS_WORD0 416 417#define NFSD4_1_SUPPORTED_ATTRS_WORD1 \ 418 (NFSD4_SUPPORTED_ATTRS_WORD1 | PNFSD_SUPPORTED_ATTRS_WORD1) 419 420#define NFSD4_1_SUPPORTED_ATTRS_WORD2 \ 421 (NFSD4_SUPPORTED_ATTRS_WORD2 | PNFSD_SUPPORTED_ATTRS_WORD2 | \ 422 FATTR4_WORD2_SUPPATTR_EXCLCREAT) 423 424/* 4.2 */ 425#ifdef CONFIG_NFSD_V4_SECURITY_LABEL 426#define NFSD4_2_SECURITY_ATTRS FATTR4_WORD2_SECURITY_LABEL 427#else 428#define NFSD4_2_SECURITY_ATTRS 0 429#endif 430 431#define NFSD4_2_SUPPORTED_ATTRS_WORD2 \ 432 (NFSD4_1_SUPPORTED_ATTRS_WORD2 | \ 433 FATTR4_WORD2_MODE_UMASK | \ 434 NFSD4_2_SECURITY_ATTRS | \ 435 FATTR4_WORD2_XATTR_SUPPORT) 436 437extern const u32 nfsd_suppattrs[3][3]; 438 439static inline __be32 nfsd4_set_netaddr(struct sockaddr *addr, 440 struct nfs42_netaddr *netaddr) 441{ 442 struct sockaddr_in *sin = (struct sockaddr_in *)addr; 443 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr; 444 unsigned int port; 445 size_t ret_addr, ret_port; 446 447 switch (addr->sa_family) { 448 case AF_INET: 449 port = ntohs(sin->sin_port); 450 sprintf(netaddr->netid, "tcp"); 451 netaddr->netid_len = 3; 452 break; 453 case AF_INET6: 454 port = ntohs(sin6->sin6_port); 455 sprintf(netaddr->netid, "tcp6"); 456 netaddr->netid_len = 4; 457 break; 458 default: 459 return nfserr_inval; 460 } 461 ret_addr = rpc_ntop(addr, netaddr->addr, sizeof(netaddr->addr)); 462 ret_port = snprintf(netaddr->addr + ret_addr, 463 RPCBIND_MAXUADDRLEN + 1 - ret_addr, 464 ".%u.%u", port >> 8, port & 0xff); 465 WARN_ON(ret_port >= RPCBIND_MAXUADDRLEN + 1 - ret_addr); 466 netaddr->addr_len = ret_addr + ret_port; 467 return 0; 468} 469 470static inline bool bmval_is_subset(const u32 *bm1, const u32 *bm2) 471{ 472 return !((bm1[0] & ~bm2[0]) || 473 (bm1[1] & ~bm2[1]) || 474 (bm1[2] & ~bm2[2])); 475} 476 477static inline bool nfsd_attrs_supported(u32 minorversion, const u32 *bmval) 478{ 479 return bmval_is_subset(bmval, nfsd_suppattrs[minorversion]); 480} 481 482/* These will return ERR_INVAL if specified in GETATTR or READDIR. */ 483#define NFSD_WRITEONLY_ATTRS_WORD1 \ 484 (FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET) 485 486/* 487 * These are the only attrs allowed in CREATE/OPEN/SETATTR. Don't add 488 * a writeable attribute here without also adding code to parse it to 489 * nfsd4_decode_fattr(). 490 */ 491#define NFSD_WRITEABLE_ATTRS_WORD0 \ 492 (FATTR4_WORD0_SIZE | FATTR4_WORD0_ACL) 493#define NFSD_WRITEABLE_ATTRS_WORD1 \ 494 (FATTR4_WORD1_MODE | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP \ 495 | FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_CREATE \ 496 | FATTR4_WORD1_TIME_MODIFY_SET) 497#ifdef CONFIG_NFSD_V4_SECURITY_LABEL 498#define MAYBE_FATTR4_WORD2_SECURITY_LABEL \ 499 FATTR4_WORD2_SECURITY_LABEL 500#else 501#define MAYBE_FATTR4_WORD2_SECURITY_LABEL 0 502#endif 503#define NFSD_WRITEABLE_ATTRS_WORD2 \ 504 (FATTR4_WORD2_MODE_UMASK \ 505 | MAYBE_FATTR4_WORD2_SECURITY_LABEL) 506 507#define NFSD_SUPPATTR_EXCLCREAT_WORD0 \ 508 NFSD_WRITEABLE_ATTRS_WORD0 509/* 510 * we currently store the exclusive create verifier in the v_{a,m}time 511 * attributes so the client can't set these at create time using EXCLUSIVE4_1 512 */ 513#define NFSD_SUPPATTR_EXCLCREAT_WORD1 \ 514 (NFSD_WRITEABLE_ATTRS_WORD1 & \ 515 ~(FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET)) 516#define NFSD_SUPPATTR_EXCLCREAT_WORD2 \ 517 NFSD_WRITEABLE_ATTRS_WORD2 518 519extern int nfsd4_is_junction(struct dentry *dentry); 520extern int register_cld_notifier(void); 521extern void unregister_cld_notifier(void); 522#ifdef CONFIG_NFSD_V4_2_INTER_SSC 523extern void nfsd4_ssc_init_umount_work(struct nfsd_net *nn); 524#endif 525 526extern void nfsd4_init_leases_net(struct nfsd_net *nn); 527 528#else /* CONFIG_NFSD_V4 */ 529static inline int nfsd4_is_junction(struct dentry *dentry) 530{ 531 return 0; 532} 533 534static inline void nfsd4_init_leases_net(struct nfsd_net *nn) { }; 535 536#define register_cld_notifier() 0 537#define unregister_cld_notifier() do { } while(0) 538 539#endif /* CONFIG_NFSD_V4 */ 540 541#endif /* LINUX_NFSD_NFSD_H */ 542