fs/nfsd/nfsd.h

   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 "export.h"
  27
  28 #undef ifdebug
  29 #ifdef CONFIG_SUNRPC_DEBUG
  30 # define ifdebug(flag)          if (nfsd_debug & NFSDDBG_##flag)
  31 #else
  32 # define ifdebug(flag)          if (0)
  33 #endif
  34
  35 /*
  36  * nfsd version
  37  */
  38 #define NFSD_MINVERS                    2
  39 #define NFSD_MAXVERS                    4
  40 #define NFSD_SUPPORTED_MINOR_VERSION    2
  41 bool nfsd_support_version(int vers);
  42
  43 #include "netns.h"
  44 #include "stats.h"
  45
  46 /*
  47  * Maximum blocksizes supported by daemon under various circumstances.
  48  */
  49 #define NFSSVC_MAXBLKSIZE       RPCSVC_MAXPAYLOAD
  50 /* NFSv2 is limited by the protocol specification, see RFC 1094 */
  51 #define NFSSVC_MAXBLKSIZE_V2    (8*1024)
  52
  53
  54 /*
  55  * Largest number of bytes we need to allocate for an NFS
  56  * call or reply.  Used to control buffer sizes.  We use
  57  * the length of v3 WRITE, READDIR and READDIR replies
  58  * which are an RPC header, up to 26 XDR units of reply
  59  * data, and some page data.
  60  *
  61  * Note that accuracy here doesn't matter too much as the
  62  * size is rounded up to a page size when allocating space.
  63  */
  64 #define NFSD_BUFSIZE            ((RPC_MAX_HEADER_WITH_AUTH+26)*XDR_UNIT + NFSSVC_MAXBLKSIZE)
  65
  66 struct readdir_cd {
  67         __be32                  err;    /* 0, nfserr, or nfserr_eof */
  68 };
  69
  70 /* Maximum number of operations per session compound */
  71 #define NFSD_MAX_OPS_PER_COMPOUND       50
  72
  73 struct nfsd_genl_rqstp {
  74         struct sockaddr         rq_daddr;
  75         struct sockaddr         rq_saddr;
  76         unsigned long           rq_flags;
  77         ktime_t                 rq_stime;
  78         __be32                  rq_xid;
  79         u32                     rq_vers;
  80         u32                     rq_prog;
  81         u32                     rq_proc;
  82
  83         /* NFSv4 compound */
  84         u32                     rq_opcnt;
  85         u32                     rq_opnum[NFSD_MAX_OPS_PER_COMPOUND];
  86 };
  87
  88 extern struct svc_program       nfsd_programs[];
  89 extern const struct svc_version nfsd_version2, nfsd_version3, nfsd_version4;
  90 extern struct mutex             nfsd_mutex;
  91 extern spinlock_t               nfsd_drc_lock;
  92 extern unsigned long            nfsd_drc_max_mem;
  93 extern unsigned long            nfsd_drc_mem_used;
  94 extern atomic_t                 nfsd_th_cnt;            /* number of available threads */
  95
  96 extern const struct seq_operations nfs_exports_op;
  97
  98 /*
  99  * Common void argument and result helpers
 100  */
 101 struct nfsd_voidargs { };
 102 struct nfsd_voidres { };
 103 bool            nfssvc_decode_voidarg(struct svc_rqst *rqstp,
 104                                       struct xdr_stream *xdr);
 105 bool            nfssvc_encode_voidres(struct svc_rqst *rqstp,
 106                                       struct xdr_stream *xdr);
 107
 108 /*
 109  * Function prototypes.
 110  */
 111 int             nfsd_svc(int n, int *nservers, struct net *net,
 112                          const struct cred *cred, const char *scope);
 113 int             nfsd_dispatch(struct svc_rqst *rqstp);
 114
 115 int             nfsd_nrthreads(struct net *);
 116 int             nfsd_nrpools(struct net *);
 117 int             nfsd_get_nrthreads(int n, int *, struct net *);
 118 int             nfsd_set_nrthreads(int n, int *, struct net *);
 119 void            nfsd_shutdown_threads(struct net *net);
 120
 121 struct svc_rqst *nfsd_current_rqst(void);
 122
 123 struct nfsdfs_client {
 124         struct kref cl_ref;
 125         void (*cl_release)(struct kref *kref);
 126 };
 127
 128 struct nfsdfs_client *get_nfsdfs_client(struct inode *);
 129 struct dentry *nfsd_client_mkdir(struct nfsd_net *nn,
 130                                  struct nfsdfs_client *ncl, u32 id,
 131                                  const struct tree_descr *,
 132                                  struct dentry **fdentries);
 133 void nfsd_client_rmdir(struct dentry *dentry);
 134
 135
 136 #if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL)
 137 #ifdef CONFIG_NFSD_V2_ACL
 138 extern const struct svc_version nfsd_acl_version2;
 139 #else
 140 #define nfsd_acl_version2 NULL
 141 #endif
 142 #ifdef CONFIG_NFSD_V3_ACL
 143 extern const struct svc_version nfsd_acl_version3;
 144 #else
 145 #define nfsd_acl_version3 NULL
 146 #endif
 147 #endif
 148
 149 #if IS_ENABLED(CONFIG_NFS_LOCALIO)
 150 extern const struct svc_version localio_version1;
 151 #endif
 152
 153 struct nfsd_net;
 154
 155 enum vers_op {NFSD_SET, NFSD_CLEAR, NFSD_TEST, NFSD_AVAIL };
 156 int nfsd_vers(struct nfsd_net *nn, int vers, enum vers_op change);
 157 int nfsd_minorversion(struct nfsd_net *nn, u32 minorversion, enum vers_op change);
 158 void nfsd_reset_versions(struct nfsd_net *nn);
 159 int nfsd_create_serv(struct net *net);
 160 void nfsd_destroy_serv(struct net *net);
 161
 162 extern int nfsd_max_blksize;
 163
 164 static inline int nfsd_v4client(struct svc_rqst *rq)
 165 {
 166         return rq && rq->rq_prog == NFS_PROGRAM && rq->rq_vers == 4;
 167 }
 168 static inline struct user_namespace *
 169 nfsd_user_namespace(const struct svc_rqst *rqstp)
 170 {
 171         const struct cred *cred = rqstp->rq_xprt->xpt_cred;
 172         return cred ? cred->user_ns : &init_user_ns;
 173 }
 174
 175 /*
 176  * NFSv4 State
 177  */
 178 #ifdef CONFIG_NFSD_V4
 179 extern unsigned long max_delegations;
 180 int nfsd4_init_slabs(void);
 181 void nfsd4_free_slabs(void);
 182 int nfs4_state_start(void);
 183 int nfs4_state_start_net(struct net *net);
 184 void nfs4_state_shutdown(void);
 185 void nfs4_state_shutdown_net(struct net *net);
 186 int nfs4_reset_recoverydir(char *recdir);
 187 char * nfs4_recoverydir(void);
 188 bool nfsd4_spo_must_allow(struct svc_rqst *rqstp);
 189 int nfsd4_create_laundry_wq(void);
 190 void nfsd4_destroy_laundry_wq(void);
 191 bool nfsd_wait_for_delegreturn(struct svc_rqst *rqstp, struct inode *inode);
 192 #else
 193 static inline int nfsd4_init_slabs(void) { return 0; }
 194 static inline void nfsd4_free_slabs(void) { }
 195 static inline int nfs4_state_start(void) { return 0; }
 196 static inline int nfs4_state_start_net(struct net *net) { return 0; }
 197 static inline void nfs4_state_shutdown(void) { }
 198 static inline void nfs4_state_shutdown_net(struct net *net) { }
 199 static inline int nfs4_reset_recoverydir(char *recdir) { return 0; }
 200 static inline char * nfs4_recoverydir(void) {return NULL; }
 201 static inline bool nfsd4_spo_must_allow(struct svc_rqst *rqstp)
 202 {
 203         return false;
 204 }
 205 static inline int nfsd4_create_laundry_wq(void) { return 0; };
 206 static inline void nfsd4_destroy_laundry_wq(void) {};
 207 static inline bool nfsd_wait_for_delegreturn(struct svc_rqst *rqstp,
 208                                               struct inode *inode)
 209 {
 210         return false;
 211 }
 212 #endif
 213
 214 /*
 215  * lockd binding
 216  */
 217 void            nfsd_lockd_init(void);
 218 void            nfsd_lockd_shutdown(void);
 219
 220
 221 /*
 222  * These macros provide pre-xdr'ed values for faster operation.
 223  */
 224 #define nfs_ok                  cpu_to_be32(NFS_OK)
 225 #define nfserr_perm             cpu_to_be32(NFSERR_PERM)
 226 #define nfserr_noent            cpu_to_be32(NFSERR_NOENT)
 227 #define nfserr_io               cpu_to_be32(NFSERR_IO)
 228 #define nfserr_nxio             cpu_to_be32(NFSERR_NXIO)
 229 #define nfserr_eagain           cpu_to_be32(NFSERR_EAGAIN)
 230 #define nfserr_acces            cpu_to_be32(NFSERR_ACCES)
 231 #define nfserr_exist            cpu_to_be32(NFSERR_EXIST)
 232 #define nfserr_xdev             cpu_to_be32(NFSERR_XDEV)
 233 #define nfserr_nodev            cpu_to_be32(NFSERR_NODEV)
 234 #define nfserr_notdir           cpu_to_be32(NFSERR_NOTDIR)
 235 #define nfserr_isdir            cpu_to_be32(NFSERR_ISDIR)
 236 #define nfserr_inval            cpu_to_be32(NFSERR_INVAL)
 237 #define nfserr_fbig             cpu_to_be32(NFSERR_FBIG)
 238 #define nfserr_nospc            cpu_to_be32(NFSERR_NOSPC)
 239 #define nfserr_rofs             cpu_to_be32(NFSERR_ROFS)
 240 #define nfserr_mlink            cpu_to_be32(NFSERR_MLINK)
 241 #define nfserr_nametoolong      cpu_to_be32(NFSERR_NAMETOOLONG)
 242 #define nfserr_notempty         cpu_to_be32(NFSERR_NOTEMPTY)
 243 #define nfserr_dquot            cpu_to_be32(NFSERR_DQUOT)
 244 #define nfserr_stale            cpu_to_be32(NFSERR_STALE)
 245 #define nfserr_remote           cpu_to_be32(NFSERR_REMOTE)
 246 #define nfserr_wflush           cpu_to_be32(NFSERR_WFLUSH)
 247 #define nfserr_badhandle        cpu_to_be32(NFSERR_BADHANDLE)
 248 #define nfserr_notsync          cpu_to_be32(NFSERR_NOT_SYNC)
 249 #define nfserr_badcookie        cpu_to_be32(NFSERR_BAD_COOKIE)
 250 #define nfserr_notsupp          cpu_to_be32(NFSERR_NOTSUPP)
 251 #define nfserr_toosmall         cpu_to_be32(NFSERR_TOOSMALL)
 252 #define nfserr_serverfault      cpu_to_be32(NFSERR_SERVERFAULT)
 253 #define nfserr_badtype          cpu_to_be32(NFSERR_BADTYPE)
 254 #define nfserr_jukebox          cpu_to_be32(NFSERR_JUKEBOX)
 255 #define nfserr_denied           cpu_to_be32(NFSERR_DENIED)
 256 #define nfserr_deadlock         cpu_to_be32(NFSERR_DEADLOCK)
 257 #define nfserr_expired          cpu_to_be32(NFSERR_EXPIRED)
 258 #define nfserr_bad_cookie       cpu_to_be32(NFSERR_BAD_COOKIE)
 259 #define nfserr_same             cpu_to_be32(NFSERR_SAME)
 260 #define nfserr_clid_inuse       cpu_to_be32(NFSERR_CLID_INUSE)
 261 #define nfserr_stale_clientid   cpu_to_be32(NFSERR_STALE_CLIENTID)
 262 #define nfserr_resource         cpu_to_be32(NFSERR_RESOURCE)
 263 #define nfserr_moved            cpu_to_be32(NFSERR_MOVED)
 264 #define nfserr_nofilehandle     cpu_to_be32(NFSERR_NOFILEHANDLE)
 265 #define nfserr_minor_vers_mismatch      cpu_to_be32(NFSERR_MINOR_VERS_MISMATCH)
 266 #define nfserr_share_denied     cpu_to_be32(NFSERR_SHARE_DENIED)
 267 #define nfserr_stale_stateid    cpu_to_be32(NFSERR_STALE_STATEID)
 268 #define nfserr_old_stateid      cpu_to_be32(NFSERR_OLD_STATEID)
 269 #define nfserr_bad_stateid      cpu_to_be32(NFSERR_BAD_STATEID)
 270 #define nfserr_bad_seqid        cpu_to_be32(NFSERR_BAD_SEQID)
 271 #define nfserr_symlink          cpu_to_be32(NFSERR_SYMLINK)
 272 #define nfserr_not_same         cpu_to_be32(NFSERR_NOT_SAME)
 273 #define nfserr_lock_range       cpu_to_be32(NFSERR_LOCK_RANGE)
 274 #define nfserr_restorefh        cpu_to_be32(NFSERR_RESTOREFH)
 275 #define nfserr_attrnotsupp      cpu_to_be32(NFSERR_ATTRNOTSUPP)
 276 #define nfserr_bad_xdr          cpu_to_be32(NFSERR_BAD_XDR)
 277 #define nfserr_openmode         cpu_to_be32(NFSERR_OPENMODE)
 278 #define nfserr_badowner         cpu_to_be32(NFSERR_BADOWNER)
 279 #define nfserr_locks_held       cpu_to_be32(NFSERR_LOCKS_HELD)
 280 #define nfserr_op_illegal       cpu_to_be32(NFSERR_OP_ILLEGAL)
 281 #define nfserr_grace            cpu_to_be32(NFSERR_GRACE)
 282 #define nfserr_no_grace         cpu_to_be32(NFSERR_NO_GRACE)
 283 #define nfserr_reclaim_bad      cpu_to_be32(NFSERR_RECLAIM_BAD)
 284 #define nfserr_badname          cpu_to_be32(NFSERR_BADNAME)
 285 #define nfserr_admin_revoked    cpu_to_be32(NFS4ERR_ADMIN_REVOKED)
 286 #define nfserr_cb_path_down     cpu_to_be32(NFSERR_CB_PATH_DOWN)
 287 #define nfserr_locked           cpu_to_be32(NFSERR_LOCKED)
 288 #define nfserr_wrongsec         cpu_to_be32(NFSERR_WRONGSEC)
 289 #define nfserr_badiomode                cpu_to_be32(NFS4ERR_BADIOMODE)
 290 #define nfserr_badlayout                cpu_to_be32(NFS4ERR_BADLAYOUT)
 291 #define nfserr_bad_session_digest       cpu_to_be32(NFS4ERR_BAD_SESSION_DIGEST)
 292 #define nfserr_badsession               cpu_to_be32(NFS4ERR_BADSESSION)
 293 #define nfserr_badslot                  cpu_to_be32(NFS4ERR_BADSLOT)
 294 #define nfserr_complete_already         cpu_to_be32(NFS4ERR_COMPLETE_ALREADY)
 295 #define nfserr_conn_not_bound_to_session cpu_to_be32(NFS4ERR_CONN_NOT_BOUND_TO_SESSION)
 296 #define nfserr_deleg_already_wanted     cpu_to_be32(NFS4ERR_DELEG_ALREADY_WANTED)
 297 #define nfserr_back_chan_busy           cpu_to_be32(NFS4ERR_BACK_CHAN_BUSY)
 298 #define nfserr_layouttrylater           cpu_to_be32(NFS4ERR_LAYOUTTRYLATER)
 299 #define nfserr_layoutunavailable        cpu_to_be32(NFS4ERR_LAYOUTUNAVAILABLE)
 300 #define nfserr_nomatching_layout        cpu_to_be32(NFS4ERR_NOMATCHING_LAYOUT)
 301 #define nfserr_recallconflict           cpu_to_be32(NFS4ERR_RECALLCONFLICT)
 302 #define nfserr_unknown_layouttype       cpu_to_be32(NFS4ERR_UNKNOWN_LAYOUTTYPE)
 303 #define nfserr_seq_misordered           cpu_to_be32(NFS4ERR_SEQ_MISORDERED)
 304 #define nfserr_sequence_pos             cpu_to_be32(NFS4ERR_SEQUENCE_POS)
 305 #define nfserr_req_too_big              cpu_to_be32(NFS4ERR_REQ_TOO_BIG)
 306 #define nfserr_rep_too_big              cpu_to_be32(NFS4ERR_REP_TOO_BIG)
 307 #define nfserr_rep_too_big_to_cache     cpu_to_be32(NFS4ERR_REP_TOO_BIG_TO_CACHE)
 308 #define nfserr_retry_uncached_rep       cpu_to_be32(NFS4ERR_RETRY_UNCACHED_REP)
 309 #define nfserr_unsafe_compound          cpu_to_be32(NFS4ERR_UNSAFE_COMPOUND)
 310 #define nfserr_too_many_ops             cpu_to_be32(NFS4ERR_TOO_MANY_OPS)
 311 #define nfserr_op_not_in_session        cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION)
 312 #define nfserr_hash_alg_unsupp          cpu_to_be32(NFS4ERR_HASH_ALG_UNSUPP)
 313 #define nfserr_clientid_busy            cpu_to_be32(NFS4ERR_CLIENTID_BUSY)
 314 #define nfserr_pnfs_io_hole             cpu_to_be32(NFS4ERR_PNFS_IO_HOLE)
 315 #define nfserr_seq_false_retry          cpu_to_be32(NFS4ERR_SEQ_FALSE_RETRY)
 316 #define nfserr_bad_high_slot            cpu_to_be32(NFS4ERR_BAD_HIGH_SLOT)
 317 #define nfserr_deadsession              cpu_to_be32(NFS4ERR_DEADSESSION)
 318 #define nfserr_encr_alg_unsupp          cpu_to_be32(NFS4ERR_ENCR_ALG_UNSUPP)
 319 #define nfserr_pnfs_no_layout           cpu_to_be32(NFS4ERR_PNFS_NO_LAYOUT)
 320 #define nfserr_not_only_op              cpu_to_be32(NFS4ERR_NOT_ONLY_OP)
 321 #define nfserr_wrong_cred               cpu_to_be32(NFS4ERR_WRONG_CRED)
 322 #define nfserr_wrong_type               cpu_to_be32(NFS4ERR_WRONG_TYPE)
 323 #define nfserr_dirdeleg_unavail         cpu_to_be32(NFS4ERR_DIRDELEG_UNAVAIL)
 324 #define nfserr_reject_deleg             cpu_to_be32(NFS4ERR_REJECT_DELEG)
 325 #define nfserr_returnconflict           cpu_to_be32(NFS4ERR_RETURNCONFLICT)
 326 #define nfserr_deleg_revoked            cpu_to_be32(NFS4ERR_DELEG_REVOKED)
 327 #define nfserr_partner_notsupp          cpu_to_be32(NFS4ERR_PARTNER_NOTSUPP)
 328 #define nfserr_partner_no_auth          cpu_to_be32(NFS4ERR_PARTNER_NO_AUTH)
 329 #define nfserr_union_notsupp            cpu_to_be32(NFS4ERR_UNION_NOTSUPP)
 330 #define nfserr_offload_denied           cpu_to_be32(NFS4ERR_OFFLOAD_DENIED)
 331 #define nfserr_wrong_lfs                cpu_to_be32(NFS4ERR_WRONG_LFS)
 332 #define nfserr_badlabel                 cpu_to_be32(NFS4ERR_BADLABEL)
 333 #define nfserr_file_open                cpu_to_be32(NFS4ERR_FILE_OPEN)
 334 #define nfserr_xattr2big                cpu_to_be32(NFS4ERR_XATTR2BIG)
 335 #define nfserr_noxattr                  cpu_to_be32(NFS4ERR_NOXATTR)
 336
 337 /*
 338  * Error codes for internal use.  We use enum to choose numbers that are
 339  * not already assigned, then covert to be32 resulting in a number that
 340  * cannot conflict with any existing be32 nfserr value.
 341  */
 342 enum {
 343         NFSERR_DROPIT = NFS4ERR_FIRST_FREE,
 344 /* if a request fails due to kmalloc failure, it gets dropped.
 345  *  Client should resend eventually
 346  */
 347 #define nfserr_dropit           cpu_to_be32(NFSERR_DROPIT)
 348
 349 /* end-of-file indicator in readdir */
 350         NFSERR_EOF,
 351 #define nfserr_eof              cpu_to_be32(NFSERR_EOF)
 352
 353 /* replay detected */
 354         NFSERR_REPLAY_ME,
 355 #define nfserr_replay_me        cpu_to_be32(NFSERR_REPLAY_ME)
 356
 357 /* nfs41 replay detected */
 358         NFSERR_REPLAY_CACHE,
 359 #define nfserr_replay_cache     cpu_to_be32(NFSERR_REPLAY_CACHE)
 360
 361 /* symlink found where dir expected - handled differently to
 362  * other symlink found errors by NFSv3.
 363  */
 364         NFSERR_SYMLINK_NOT_DIR,
 365 #define nfserr_symlink_not_dir  cpu_to_be32(NFSERR_SYMLINK_NOT_DIR)
 366 };
 367
 368 /* Check for dir entries '.' and '..' */
 369 #define isdotent(n, l)  (l < 3 && n[0] == '.' && (l == 1 || n[1] == '.'))
 370
 371 #ifdef CONFIG_NFSD_V4
 372
 373 /* before processing a COMPOUND operation, we have to check that there
 374  * is enough space in the buffer for XDR encode to succeed.  otherwise,
 375  * we might process an operation with side effects, and be unable to
 376  * tell the client that the operation succeeded.
 377  *
 378  * COMPOUND_SLACK_SPACE - this is the minimum bytes of buffer space
 379  * needed to encode an "ordinary" _successful_ operation.  (GETATTR,
 380  * READ, READDIR, and READLINK have their own buffer checks.)  if we
 381  * fall below this level, we fail the next operation with NFS4ERR_RESOURCE.
 382  *
 383  * COMPOUND_ERR_SLACK_SPACE - this is the minimum bytes of buffer space
 384  * needed to encode an operation which has failed with NFS4ERR_RESOURCE.
 385  * care is taken to ensure that we never fall below this level for any
 386  * reason.
 387  */
 388 #define COMPOUND_SLACK_SPACE            140    /* OP_GETFH */
 389 #define COMPOUND_ERR_SLACK_SPACE        16     /* OP_SETATTR */
 390
 391 #define NFSD_LAUNDROMAT_MINTIMEOUT      1   /* seconds */
 392 #define NFSD_COURTESY_CLIENT_TIMEOUT    (24 * 60 * 60)  /* seconds */
 393 #define NFSD_CLIENT_MAX_TRIM_PER_RUN    128
 394 #define NFS4_CLIENTS_PER_GB             1024
 395 #define NFSD_DELEGRETURN_TIMEOUT        (HZ / 34)       /* 30ms */
 396 #define NFSD_CB_GETATTR_TIMEOUT         NFSD_DELEGRETURN_TIMEOUT
 397
 398 /*
 399  * The following attributes are currently not supported by the NFSv4 server:
 400  *    ARCHIVE       (deprecated anyway)
 401  *    HIDDEN        (unlikely to be supported any time soon)
 402  *    MIMETYPE      (unlikely to be supported any time soon)
 403  *    QUOTA_*       (will be supported in a forthcoming patch)
 404  *    SYSTEM        (unlikely to be supported any time soon)
 405  *    TIME_BACKUP   (unlikely to be supported any time soon)
 406  *    TIME_CREATE   (unlikely to be supported any time soon)
 407  */
 408 #define NFSD4_SUPPORTED_ATTRS_WORD0                                                         \
 409 (FATTR4_WORD0_SUPPORTED_ATTRS   | FATTR4_WORD0_TYPE         | FATTR4_WORD0_FH_EXPIRE_TYPE   \
 410  | FATTR4_WORD0_CHANGE          | FATTR4_WORD0_SIZE         | FATTR4_WORD0_LINK_SUPPORT     \
 411  | FATTR4_WORD0_SYMLINK_SUPPORT | FATTR4_WORD0_NAMED_ATTR   | FATTR4_WORD0_FSID             \
 412  | FATTR4_WORD0_UNIQUE_HANDLES  | FATTR4_WORD0_LEASE_TIME   | FATTR4_WORD0_RDATTR_ERROR     \
 413  | FATTR4_WORD0_ACLSUPPORT      | FATTR4_WORD0_CANSETTIME   | FATTR4_WORD0_CASE_INSENSITIVE \
 414  | FATTR4_WORD0_CASE_PRESERVING | FATTR4_WORD0_CHOWN_RESTRICTED                             \
 415  | FATTR4_WORD0_FILEHANDLE      | FATTR4_WORD0_FILEID       | FATTR4_WORD0_FILES_AVAIL      \
 416  | FATTR4_WORD0_FILES_FREE      | FATTR4_WORD0_FILES_TOTAL  | FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_HOMOGENEOUS      \
 417  | FATTR4_WORD0_MAXFILESIZE     | FATTR4_WORD0_MAXLINK      | FATTR4_WORD0_MAXNAME          \
 418  | FATTR4_WORD0_MAXREAD         | FATTR4_WORD0_MAXWRITE     | FATTR4_WORD0_ACL)
 419
 420 #define NFSD4_SUPPORTED_ATTRS_WORD1                                                         \
 421 (FATTR4_WORD1_MODE              | FATTR4_WORD1_NO_TRUNC     | FATTR4_WORD1_NUMLINKS         \
 422  | FATTR4_WORD1_OWNER           | FATTR4_WORD1_OWNER_GROUP  | FATTR4_WORD1_RAWDEV           \
 423  | FATTR4_WORD1_SPACE_AVAIL     | FATTR4_WORD1_SPACE_FREE   | FATTR4_WORD1_SPACE_TOTAL      \
 424  | FATTR4_WORD1_SPACE_USED      | FATTR4_WORD1_TIME_ACCESS  | FATTR4_WORD1_TIME_ACCESS_SET  \
 425  | FATTR4_WORD1_TIME_DELTA      | FATTR4_WORD1_TIME_METADATA   | FATTR4_WORD1_TIME_CREATE      \
 426  | FATTR4_WORD1_TIME_MODIFY     | FATTR4_WORD1_TIME_MODIFY_SET | FATTR4_WORD1_MOUNTED_ON_FILEID)
 427
 428 #define NFSD4_SUPPORTED_ATTRS_WORD2 0
 429
 430 /* 4.1 */
 431 #ifdef CONFIG_NFSD_PNFS
 432 #define PNFSD_SUPPORTED_ATTRS_WORD1     FATTR4_WORD1_FS_LAYOUT_TYPES
 433 #define PNFSD_SUPPORTED_ATTRS_WORD2 \
 434 (FATTR4_WORD2_LAYOUT_BLKSIZE    | FATTR4_WORD2_LAYOUT_TYPES)
 435 #else
 436 #define PNFSD_SUPPORTED_ATTRS_WORD1     0
 437 #define PNFSD_SUPPORTED_ATTRS_WORD2     0
 438 #endif /* CONFIG_NFSD_PNFS */
 439
 440 #define NFSD4_1_SUPPORTED_ATTRS_WORD0 \
 441         NFSD4_SUPPORTED_ATTRS_WORD0
 442
 443 #define NFSD4_1_SUPPORTED_ATTRS_WORD1 \
 444         (NFSD4_SUPPORTED_ATTRS_WORD1    | PNFSD_SUPPORTED_ATTRS_WORD1)
 445
 446 #define NFSD4_1_SUPPORTED_ATTRS_WORD2 \
 447         (NFSD4_SUPPORTED_ATTRS_WORD2    | PNFSD_SUPPORTED_ATTRS_WORD2 | \
 448          FATTR4_WORD2_SUPPATTR_EXCLCREAT)
 449
 450 /* 4.2 */
 451 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
 452 #define NFSD4_2_SECURITY_ATTRS          FATTR4_WORD2_SECURITY_LABEL
 453 #else
 454 #define NFSD4_2_SECURITY_ATTRS          0
 455 #endif
 456
 457 #define NFSD4_2_SUPPORTED_ATTRS_WORD2 \
 458         (NFSD4_1_SUPPORTED_ATTRS_WORD2 | \
 459         FATTR4_WORD2_MODE_UMASK | \
 460         NFSD4_2_SECURITY_ATTRS | \
 461         FATTR4_WORD2_XATTR_SUPPORT)
 462
 463 extern const u32 nfsd_suppattrs[3][3];
 464
 465 static inline __be32 nfsd4_set_netaddr(struct sockaddr *addr,
 466                                     struct nfs42_netaddr *netaddr)
 467 {
 468         struct sockaddr_in *sin = (struct sockaddr_in *)addr;
 469         struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr;
 470         unsigned int port;
 471         size_t ret_addr, ret_port;
 472
 473         switch (addr->sa_family) {
 474         case AF_INET:
 475                 port = ntohs(sin->sin_port);
 476                 sprintf(netaddr->netid, "tcp");
 477                 netaddr->netid_len = 3;
 478                 break;
 479         case AF_INET6:
 480                 port = ntohs(sin6->sin6_port);
 481                 sprintf(netaddr->netid, "tcp6");
 482                 netaddr->netid_len = 4;
 483                 break;
 484         default:
 485                 return nfserr_inval;
 486         }
 487         ret_addr = rpc_ntop(addr, netaddr->addr, sizeof(netaddr->addr));
 488         ret_port = snprintf(netaddr->addr + ret_addr,
 489                             RPCBIND_MAXUADDRLEN + 1 - ret_addr,
 490                             ".%u.%u", port >> 8, port & 0xff);
 491         WARN_ON(ret_port >= RPCBIND_MAXUADDRLEN + 1 - ret_addr);
 492         netaddr->addr_len = ret_addr + ret_port;
 493         return 0;
 494 }
 495
 496 static inline bool bmval_is_subset(const u32 *bm1, const u32 *bm2)
 497 {
 498         return !((bm1[0] & ~bm2[0]) ||
 499                  (bm1[1] & ~bm2[1]) ||
 500                  (bm1[2] & ~bm2[2]));
 501 }
 502
 503 static inline bool nfsd_attrs_supported(u32 minorversion, const u32 *bmval)
 504 {
 505         return bmval_is_subset(bmval, nfsd_suppattrs[minorversion]);
 506 }
 507
 508 /* These will return ERR_INVAL if specified in GETATTR or READDIR. */
 509 #define NFSD_WRITEONLY_ATTRS_WORD1 \
 510         (FATTR4_WORD1_TIME_ACCESS_SET   | FATTR4_WORD1_TIME_MODIFY_SET)
 511
 512 /*
 513  * These are the only attrs allowed in CREATE/OPEN/SETATTR. Don't add
 514  * a writeable attribute here without also adding code to parse it to
 515  * nfsd4_decode_fattr().
 516  */
 517 #define NFSD_WRITEABLE_ATTRS_WORD0 \
 518         (FATTR4_WORD0_SIZE | FATTR4_WORD0_ACL)
 519 #define NFSD_WRITEABLE_ATTRS_WORD1 \
 520         (FATTR4_WORD1_MODE | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP \
 521         | FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_CREATE \
 522         | FATTR4_WORD1_TIME_MODIFY_SET)
 523 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
 524 #define MAYBE_FATTR4_WORD2_SECURITY_LABEL \
 525         FATTR4_WORD2_SECURITY_LABEL
 526 #else
 527 #define MAYBE_FATTR4_WORD2_SECURITY_LABEL 0
 528 #endif
 529 #define NFSD_WRITEABLE_ATTRS_WORD2 \
 530         (FATTR4_WORD2_MODE_UMASK \
 531         | MAYBE_FATTR4_WORD2_SECURITY_LABEL)
 532
 533 #define NFSD_SUPPATTR_EXCLCREAT_WORD0 \
 534         NFSD_WRITEABLE_ATTRS_WORD0
 535 /*
 536  * we currently store the exclusive create verifier in the v_{a,m}time
 537  * attributes so the client can't set these at create time using EXCLUSIVE4_1
 538  */
 539 #define NFSD_SUPPATTR_EXCLCREAT_WORD1 \
 540         (NFSD_WRITEABLE_ATTRS_WORD1 & \
 541          ~(FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET))
 542 #define NFSD_SUPPATTR_EXCLCREAT_WORD2 \
 543         NFSD_WRITEABLE_ATTRS_WORD2
 544
 545 extern int nfsd4_is_junction(struct dentry *dentry);
 546 extern int register_cld_notifier(void);
 547 extern void unregister_cld_notifier(void);
 548 #ifdef CONFIG_NFSD_V4_2_INTER_SSC
 549 extern void nfsd4_ssc_init_umount_work(struct nfsd_net *nn);
 550 #endif
 551
 552 extern void nfsd4_init_leases_net(struct nfsd_net *nn);
 553
 554 #else /* CONFIG_NFSD_V4 */
 555 static inline int nfsd4_is_junction(struct dentry *dentry)
 556 {
 557         return 0;
 558 }
 559
 560 static inline void nfsd4_init_leases_net(struct nfsd_net *nn) { };
 561
 562 #define register_cld_notifier() 0
 563 #define unregister_cld_notifier() do { } while(0)
 564
 565 #endif /* CONFIG_NFSD_V4 */
 566
 567 #endif /* LINUX_NFSD_NFSD_H */