fs/nfsd/xdr4.h

   1 /*
   2  *  Server-side types for NFSv4.
   3  *
   4  *  Copyright (c) 2002 The Regents of the University of Michigan.
   5  *  All rights reserved.
   6  *
   7  *  Kendrick Smith <kmsmith@umich.edu>
   8  *  Andy Adamson   <andros@umich.edu>
   9  *
  10  *  Redistribution and use in source and binary forms, with or without
  11  *  modification, are permitted provided that the following conditions
  12  *  are met:
  13  *
  14  *  1. Redistributions of source code must retain the above copyright
  15  *     notice, this list of conditions and the following disclaimer.
  16  *  2. Redistributions in binary form must reproduce the above copyright
  17  *     notice, this list of conditions and the following disclaimer in the
  18  *     documentation and/or other materials provided with the distribution.
  19  *  3. Neither the name of the University nor the names of its
  20  *     contributors may be used to endorse or promote products derived
  21  *     from this software without specific prior written permission.
  22  *
  23  *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
  24  *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  25  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  26  *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  27  *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  28  *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  29  *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  30  *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  31  *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  32  *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  33  *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  34  *
  35  */
  36
  37 #ifndef _LINUX_NFSD_XDR4_H
  38 #define _LINUX_NFSD_XDR4_H
  39
  40 #include "state.h"
  41 #include "nfsd.h"
  42
  43 #define NFSD4_MAX_TAGLEN        128
  44 #define XDR_LEN(n)                     (((n) + 3) & ~3)
  45
  46 struct nfsd4_compound_state {
  47         struct svc_fh           current_fh;
  48         struct svc_fh           save_fh;
  49         struct nfs4_stateowner  *replay_owner;
  50         /* For sessions DRC */
  51         struct nfsd4_session    *session;
  52         struct nfsd4_slot       *slot;
  53         __be32                  *datap;
  54         size_t                  iovlen;
  55         u32                     minorversion;
  56         u32                     status;
  57 };
  58
  59 static inline bool nfsd4_has_session(struct nfsd4_compound_state *cs)
  60 {
  61         return cs->slot != NULL;
  62 }
  63
  64 struct nfsd4_change_info {
  65         u32             atomic;
  66         bool            change_supported;
  67         u32             before_ctime_sec;
  68         u32             before_ctime_nsec;
  69         u64             before_change;
  70         u32             after_ctime_sec;
  71         u32             after_ctime_nsec;
  72         u64             after_change;
  73 };
  74
  75 struct nfsd4_access {
  76         u32             ac_req_access;      /* request */
  77         u32             ac_supported;       /* response */
  78         u32             ac_resp_access;     /* response */
  79 };
  80
  81 struct nfsd4_close {
  82         u32             cl_seqid;           /* request */
  83         stateid_t       cl_stateid;         /* request+response */
  84         struct nfs4_stateowner * cl_stateowner; /* response */
  85 };
  86
  87 struct nfsd4_commit {
  88         u64             co_offset;          /* request */
  89         u32             co_count;           /* request */
  90         nfs4_verifier   co_verf;            /* response */
  91 };
  92
  93 struct nfsd4_create {
  94         u32             cr_namelen;         /* request */
  95         char *          cr_name;            /* request */
  96         u32             cr_type;            /* request */
  97         union {                             /* request */
  98                 struct {
  99                         u32 namelen;
 100                         char *name;
 101                 } link;   /* NF4LNK */
 102                 struct {
 103                         u32 specdata1;
 104                         u32 specdata2;
 105                 } dev;    /* NF4BLK, NF4CHR */
 106         } u;
 107         u32             cr_bmval[3];        /* request */
 108         struct iattr    cr_iattr;           /* request */
 109         struct nfsd4_change_info  cr_cinfo; /* response */
 110         struct nfs4_acl *cr_acl;
 111 };
 112 #define cr_linklen      u.link.namelen
 113 #define cr_linkname     u.link.name
 114 #define cr_specdata1    u.dev.specdata1
 115 #define cr_specdata2    u.dev.specdata2
 116
 117 struct nfsd4_delegreturn {
 118         stateid_t       dr_stateid;
 119 };
 120
 121 struct nfsd4_getattr {
 122         u32             ga_bmval[3];        /* request */
 123         struct svc_fh   *ga_fhp;            /* response */
 124 };
 125
 126 struct nfsd4_link {
 127         u32             li_namelen;         /* request */
 128         char *          li_name;            /* request */
 129         struct nfsd4_change_info  li_cinfo; /* response */
 130 };
 131
 132 struct nfsd4_lock_denied {
 133         clientid_t      ld_clientid;
 134         struct nfs4_stateowner   *ld_sop;
 135         u64             ld_start;
 136         u64             ld_length;
 137         u32             ld_type;
 138 };
 139
 140 struct nfsd4_lock {
 141         /* request */
 142         u32             lk_type;
 143         u32             lk_reclaim;         /* boolean */
 144         u64             lk_offset;
 145         u64             lk_length;
 146         u32             lk_is_new;
 147         union {
 148                 struct {
 149                         u32             open_seqid;
 150                         stateid_t       open_stateid;
 151                         u32             lock_seqid;
 152                         clientid_t      clientid;
 153                         struct xdr_netobj owner;
 154                 } new;
 155                 struct {
 156                         stateid_t       lock_stateid;
 157                         u32             lock_seqid;
 158                 } old;
 159         } v;
 160
 161         /* response */
 162         union {
 163                 struct {
 164                         stateid_t               stateid;
 165                 } ok;
 166                 struct nfsd4_lock_denied        denied;
 167         } u;
 168         /* The lk_replay_owner is the open owner in the open_to_lock_owner
 169          * case and the lock owner otherwise: */
 170         struct nfs4_stateowner *lk_replay_owner;
 171 };
 172 #define lk_new_open_seqid       v.new.open_seqid
 173 #define lk_new_open_stateid     v.new.open_stateid
 174 #define lk_new_lock_seqid       v.new.lock_seqid
 175 #define lk_new_clientid         v.new.clientid
 176 #define lk_new_owner            v.new.owner
 177 #define lk_old_lock_stateid     v.old.lock_stateid
 178 #define lk_old_lock_seqid       v.old.lock_seqid
 179
 180 #define lk_rflags       u.ok.rflags
 181 #define lk_resp_stateid u.ok.stateid
 182 #define lk_denied       u.denied
 183
 184
 185 struct nfsd4_lockt {
 186         u32                             lt_type;
 187         clientid_t                      lt_clientid;
 188         struct xdr_netobj               lt_owner;
 189         u64                             lt_offset;
 190         u64                             lt_length;
 191         struct nfs4_stateowner *        lt_stateowner;
 192         struct nfsd4_lock_denied        lt_denied;
 193 };
 194
 195
 196 struct nfsd4_locku {
 197         u32             lu_type;
 198         u32             lu_seqid;
 199         stateid_t       lu_stateid;
 200         u64             lu_offset;
 201         u64             lu_length;
 202         struct nfs4_stateowner  *lu_stateowner;
 203 };
 204
 205
 206 struct nfsd4_lookup {
 207         u32             lo_len;             /* request */
 208         char *          lo_name;            /* request */
 209 };
 210
 211 struct nfsd4_putfh {
 212         u32             pf_fhlen;           /* request */
 213         char            *pf_fhval;          /* request */
 214 };
 215
 216 struct nfsd4_open {
 217         u32             op_claim_type;      /* request */
 218         struct xdr_netobj op_fname;         /* request - everything but CLAIM_PREV */
 219         u32             op_delegate_type;   /* request - CLAIM_PREV only */
 220         stateid_t       op_delegate_stateid; /* request - response */
 221         u32             op_create;          /* request */
 222         u32             op_createmode;      /* request */
 223         u32             op_bmval[3];        /* request */
 224         struct iattr    iattr;              /* UNCHECKED4, GUARDED4, EXCLUSIVE4_1 */
 225         nfs4_verifier   verf;               /* EXCLUSIVE4 */
 226         clientid_t      op_clientid;        /* request */
 227         struct xdr_netobj op_owner;           /* request */
 228         u32             op_seqid;           /* request */
 229         u32             op_share_access;    /* request */
 230         u32             op_share_deny;      /* request */
 231         stateid_t       op_stateid;         /* response */
 232         u32             op_recall;          /* recall */
 233         struct nfsd4_change_info  op_cinfo; /* response */
 234         u32             op_rflags;          /* response */
 235         int             op_truncate;        /* used during processing */
 236         struct nfs4_stateowner *op_stateowner; /* used during processing */
 237         struct nfs4_acl *op_acl;
 238 };
 239 #define op_iattr        iattr
 240 #define op_verf         verf
 241
 242 struct nfsd4_open_confirm {
 243         stateid_t       oc_req_stateid          /* request */;
 244         u32             oc_seqid                /* request */;
 245         stateid_t       oc_resp_stateid         /* response */;
 246         struct nfs4_stateowner * oc_stateowner; /* response */
 247 };
 248
 249 struct nfsd4_open_downgrade {
 250         stateid_t       od_stateid;
 251         u32             od_seqid;
 252         u32             od_share_access;
 253         u32             od_share_deny;
 254         struct nfs4_stateowner *od_stateowner;
 255 };
 256
 257
 258 struct nfsd4_read {
 259         stateid_t       rd_stateid;         /* request */
 260         u64             rd_offset;          /* request */
 261         u32             rd_length;          /* request */
 262         int             rd_vlen;
 263         struct file     *rd_filp;
 264
 265         struct svc_rqst *rd_rqstp;          /* response */
 266         struct svc_fh * rd_fhp;             /* response */
 267 };
 268
 269 struct nfsd4_readdir {
 270         u64             rd_cookie;          /* request */
 271         nfs4_verifier   rd_verf;            /* request */
 272         u32             rd_dircount;        /* request */
 273         u32             rd_maxcount;        /* request */
 274         u32             rd_bmval[3];        /* request */
 275         struct svc_rqst *rd_rqstp;          /* response */
 276         struct svc_fh * rd_fhp;             /* response */
 277
 278         struct readdir_cd       common;
 279         __be32 *                buffer;
 280         int                     buflen;
 281         __be32 *                offset;
 282 };
 283
 284 struct nfsd4_release_lockowner {
 285         clientid_t        rl_clientid;
 286         struct xdr_netobj rl_owner;
 287 };
 288 struct nfsd4_readlink {
 289         struct svc_rqst *rl_rqstp;          /* request */
 290         struct svc_fh * rl_fhp;             /* request */
 291 };
 292
 293 struct nfsd4_remove {
 294         u32             rm_namelen;         /* request */
 295         char *          rm_name;            /* request */
 296         struct nfsd4_change_info  rm_cinfo; /* response */
 297 };
 298
 299 struct nfsd4_rename {
 300         u32             rn_snamelen;        /* request */
 301         char *          rn_sname;           /* request */
 302         u32             rn_tnamelen;        /* request */
 303         char *          rn_tname;           /* request */
 304         struct nfsd4_change_info  rn_sinfo; /* response */
 305         struct nfsd4_change_info  rn_tinfo; /* response */
 306 };
 307
 308 struct nfsd4_secinfo {
 309         u32 si_namelen;                                 /* request */
 310         char *si_name;                                  /* request */
 311         struct svc_export *si_exp;                      /* response */
 312 };
 313
 314 struct nfsd4_setattr {
 315         stateid_t       sa_stateid;         /* request */
 316         u32             sa_bmval[3];        /* request */
 317         struct iattr    sa_iattr;           /* request */
 318         struct nfs4_acl *sa_acl;
 319 };
 320
 321 struct nfsd4_setclientid {
 322         nfs4_verifier   se_verf;            /* request */
 323         u32             se_namelen;         /* request */
 324         char *          se_name;            /* request */
 325         u32             se_callback_prog;   /* request */
 326         u32             se_callback_netid_len;  /* request */
 327         char *          se_callback_netid_val;  /* request */
 328         u32             se_callback_addr_len;   /* request */
 329         char *          se_callback_addr_val;   /* request */
 330         u32             se_callback_ident;  /* request */
 331         clientid_t      se_clientid;        /* response */
 332         nfs4_verifier   se_confirm;         /* response */
 333 };
 334
 335 struct nfsd4_setclientid_confirm {
 336         clientid_t      sc_clientid;
 337         nfs4_verifier   sc_confirm;
 338 };
 339
 340 /* also used for NVERIFY */
 341 struct nfsd4_verify {
 342         u32             ve_bmval[3];        /* request */
 343         u32             ve_attrlen;         /* request */
 344         char *          ve_attrval;         /* request */
 345 };
 346
 347 struct nfsd4_write {
 348         stateid_t       wr_stateid;         /* request */
 349         u64             wr_offset;          /* request */
 350         u32             wr_stable_how;      /* request */
 351         u32             wr_buflen;          /* request */
 352         int             wr_vlen;
 353
 354         u32             wr_bytes_written;   /* response */
 355         u32             wr_how_written;     /* response */
 356         nfs4_verifier   wr_verifier;        /* response */
 357 };
 358
 359 struct nfsd4_exchange_id {
 360         nfs4_verifier   verifier;
 361         struct xdr_netobj clname;
 362         u32             flags;
 363         clientid_t      clientid;
 364         u32             seqid;
 365         int             spa_how;
 366 };
 367
 368 struct nfsd4_sequence {
 369         struct nfs4_sessionid   sessionid;              /* request/response */
 370         u32                     seqid;                  /* request/response */
 371         u32                     slotid;                 /* request/response */
 372         u32                     maxslots;               /* request/response */
 373         u32                     cachethis;              /* request */
 374 #if 0
 375         u32                     target_maxslots;        /* response */
 376         u32                     status_flags;           /* response */
 377 #endif /* not yet */
 378 };
 379
 380 struct nfsd4_destroy_session {
 381         struct nfs4_sessionid   sessionid;
 382 };
 383
 384 struct nfsd4_reclaim_complete {
 385         u32 rca_one_fs;
 386 };
 387
 388 struct nfsd4_op {
 389         int                                     opnum;
 390         __be32                                  status;
 391         union {
 392                 struct nfsd4_access             access;
 393                 struct nfsd4_close              close;
 394                 struct nfsd4_commit             commit;
 395                 struct nfsd4_create             create;
 396                 struct nfsd4_delegreturn        delegreturn;
 397                 struct nfsd4_getattr            getattr;
 398                 struct svc_fh *                 getfh;
 399                 struct nfsd4_link               link;
 400                 struct nfsd4_lock               lock;
 401                 struct nfsd4_lockt              lockt;
 402                 struct nfsd4_locku              locku;
 403                 struct nfsd4_lookup             lookup;
 404                 struct nfsd4_verify             nverify;
 405                 struct nfsd4_open               open;
 406                 struct nfsd4_open_confirm       open_confirm;
 407                 struct nfsd4_open_downgrade     open_downgrade;
 408                 struct nfsd4_putfh              putfh;
 409                 struct nfsd4_read               read;
 410                 struct nfsd4_readdir            readdir;
 411                 struct nfsd4_readlink           readlink;
 412                 struct nfsd4_remove             remove;
 413                 struct nfsd4_rename             rename;
 414                 clientid_t                      renew;
 415                 struct nfsd4_secinfo            secinfo;
 416                 struct nfsd4_setattr            setattr;
 417                 struct nfsd4_setclientid        setclientid;
 418                 struct nfsd4_setclientid_confirm setclientid_confirm;
 419                 struct nfsd4_verify             verify;
 420                 struct nfsd4_write              write;
 421                 struct nfsd4_release_lockowner  release_lockowner;
 422
 423                 /* NFSv4.1 */
 424                 struct nfsd4_exchange_id        exchange_id;
 425                 struct nfsd4_create_session     create_session;
 426                 struct nfsd4_destroy_session    destroy_session;
 427                 struct nfsd4_sequence           sequence;
 428                 struct nfsd4_reclaim_complete   reclaim_complete;
 429         } u;
 430         struct nfs4_replay *                    replay;
 431 };
 432
 433 struct nfsd4_compoundargs {
 434         /* scratch variables for XDR decode */
 435         __be32 *                        p;
 436         __be32 *                        end;
 437         struct page **                  pagelist;
 438         int                             pagelen;
 439         __be32                          tmp[8];
 440         __be32 *                        tmpp;
 441         struct tmpbuf {
 442                 struct tmpbuf *next;
 443                 void (*release)(const void *);
 444                 void *buf;
 445         }                               *to_free;
 446
 447         struct svc_rqst                 *rqstp;
 448
 449         u32                             taglen;
 450         char *                          tag;
 451         u32                             minorversion;
 452         u32                             opcnt;
 453         struct nfsd4_op                 *ops;
 454         struct nfsd4_op                 iops[8];
 455 };
 456
 457 struct nfsd4_compoundres {
 458         /* scratch variables for XDR encode */
 459         __be32 *                        p;
 460         __be32 *                        end;
 461         struct xdr_buf *                xbuf;
 462         struct svc_rqst *               rqstp;
 463
 464         u32                             taglen;
 465         char *                          tag;
 466         u32                             opcnt;
 467         __be32 *                        tagp; /* tag, opcount encode location */
 468         struct nfsd4_compound_state     cstate;
 469 };
 470
 471 static inline bool nfsd4_is_solo_sequence(struct nfsd4_compoundres *resp)
 472 {
 473         struct nfsd4_compoundargs *args = resp->rqstp->rq_argp;
 474         return resp->opcnt == 1 && args->ops[0].opnum == OP_SEQUENCE;
 475 }
 476
 477 static inline bool nfsd4_not_cached(struct nfsd4_compoundres *resp)
 478 {
 479         return !resp->cstate.slot->sl_cachethis || nfsd4_is_solo_sequence(resp);
 480 }
 481
 482 #define NFS4_SVC_XDRSIZE                sizeof(struct nfsd4_compoundargs)
 483
 484 static inline void
 485 set_change_info(struct nfsd4_change_info *cinfo, struct svc_fh *fhp)
 486 {
 487         BUG_ON(!fhp->fh_pre_saved);
 488         cinfo->atomic = fhp->fh_post_saved;
 489         cinfo->change_supported = IS_I_VERSION(fhp->fh_dentry->d_inode);
 490
 491         cinfo->before_change = fhp->fh_pre_change;
 492         cinfo->after_change = fhp->fh_post_change;
 493         cinfo->before_ctime_sec = fhp->fh_pre_ctime.tv_sec;
 494         cinfo->before_ctime_nsec = fhp->fh_pre_ctime.tv_nsec;
 495         cinfo->after_ctime_sec = fhp->fh_post_attr.ctime.tv_sec;
 496         cinfo->after_ctime_nsec = fhp->fh_post_attr.ctime.tv_nsec;
 497
 498 }
 499
 500 int nfs4svc_encode_voidres(struct svc_rqst *, __be32 *, void *);
 501 int nfs4svc_decode_compoundargs(struct svc_rqst *, __be32 *,
 502                 struct nfsd4_compoundargs *);
 503 int nfs4svc_encode_compoundres(struct svc_rqst *, __be32 *,
 504                 struct nfsd4_compoundres *);
 505 void nfsd4_encode_operation(struct nfsd4_compoundres *, struct nfsd4_op *);
 506 void nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op);
 507 __be32 nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
 508                        struct dentry *dentry, __be32 *buffer, int *countp,
 509                        u32 *bmval, struct svc_rqst *, int ignore_crossmnt);
 510 extern __be32 nfsd4_setclientid(struct svc_rqst *rqstp,
 511                 struct nfsd4_compound_state *,
 512                 struct nfsd4_setclientid *setclid);
 513 extern __be32 nfsd4_setclientid_confirm(struct svc_rqst *rqstp,
 514                 struct nfsd4_compound_state *,
 515                 struct nfsd4_setclientid_confirm *setclientid_confirm);
 516 extern void nfsd4_store_cache_entry(struct nfsd4_compoundres *resp);
 517 extern __be32 nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp,
 518                 struct nfsd4_sequence *seq);
 519 extern __be32 nfsd4_exchange_id(struct svc_rqst *rqstp,
 520                 struct nfsd4_compound_state *, struct nfsd4_exchange_id *);
 521 extern __be32 nfsd4_create_session(struct svc_rqst *,
 522                 struct nfsd4_compound_state *,
 523                 struct nfsd4_create_session *);
 524 extern __be32 nfsd4_sequence(struct svc_rqst *,
 525                 struct nfsd4_compound_state *,
 526                 struct nfsd4_sequence *);
 527 extern __be32 nfsd4_destroy_session(struct svc_rqst *,
 528                 struct nfsd4_compound_state *,
 529                 struct nfsd4_destroy_session *);
 530 __be32 nfsd4_reclaim_complete(struct svc_rqst *, struct nfsd4_compound_state *, struct nfsd4_reclaim_complete *);
 531 extern __be32 nfsd4_process_open1(struct nfsd4_compound_state *,
 532                 struct nfsd4_open *open);
 533 extern __be32 nfsd4_process_open2(struct svc_rqst *rqstp,
 534                 struct svc_fh *current_fh, struct nfsd4_open *open);
 535 extern __be32 nfsd4_open_confirm(struct svc_rqst *rqstp,
 536                 struct nfsd4_compound_state *, struct nfsd4_open_confirm *oc);
 537 extern __be32 nfsd4_close(struct svc_rqst *rqstp,
 538                 struct nfsd4_compound_state *,
 539                 struct nfsd4_close *close);
 540 extern __be32 nfsd4_open_downgrade(struct svc_rqst *rqstp,
 541                 struct nfsd4_compound_state *,
 542                 struct nfsd4_open_downgrade *od);
 543 extern __be32 nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *,
 544                 struct nfsd4_lock *lock);
 545 extern __be32 nfsd4_lockt(struct svc_rqst *rqstp,
 546                 struct nfsd4_compound_state *,
 547                 struct nfsd4_lockt *lockt);
 548 extern __be32 nfsd4_locku(struct svc_rqst *rqstp,
 549                 struct nfsd4_compound_state *,
 550                 struct nfsd4_locku *locku);
 551 extern __be32
 552 nfsd4_release_lockowner(struct svc_rqst *rqstp,
 553                 struct nfsd4_compound_state *,
 554                 struct nfsd4_release_lockowner *rlockowner);
 555 extern void nfsd4_release_compoundargs(struct nfsd4_compoundargs *);
 556 extern __be32 nfsd4_delegreturn(struct svc_rqst *rqstp,
 557                 struct nfsd4_compound_state *, struct nfsd4_delegreturn *dr);
 558 extern __be32 nfsd4_renew(struct svc_rqst *rqstp,
 559                           struct nfsd4_compound_state *, clientid_t *clid);
 560 #endif
 561
 562 /*
 563  * Local variables:
 564  *  c-basic-offset: 8
 565  * End:
 566  */