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   1 /*
   2  *  include/linux/nfsd/xdr4.h
   3  *
   4  *  Server-side types for NFSv4.
   5  *
   6  *  Copyright (c) 2002 The Regents of the University of Michigan.
   7  *  All rights reserved.
   8  *
   9  *  Kendrick Smith <kmsmith@umich.edu>
  10  *  Andy Adamson   <andros@umich.edu>
  11  *
  12  *  Redistribution and use in source and binary forms, with or without
  13  *  modification, are permitted provided that the following conditions
  14  *  are met:
  15  *
  16  *  1. Redistributions of source code must retain the above copyright
  17  *     notice, this list of conditions and the following disclaimer.
  18  *  2. Redistributions in binary form must reproduce the above copyright
  19  *     notice, this list of conditions and the following disclaimer in the
  20  *     documentation and/or other materials provided with the distribution.
  21  *  3. Neither the name of the University nor the names of its
  22  *     contributors may be used to endorse or promote products derived
  23  *     from this software without specific prior written permission.
  24  *
  25  *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
  26  *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  27  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  28  *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  29  *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  30  *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  31  *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  32  *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  33  *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  34  *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  35  *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  36  *
  37  */
  38
  39 #ifndef _LINUX_NFSD_XDR4_H
  40 #define _LINUX_NFSD_XDR4_H
  41
  42 #include <linux/nfs4.h>
  43
  44 #define NFSD4_MAX_TAGLEN        128
  45 #define XDR_LEN(n)                     (((n) + 3) & ~3)
  46
  47 struct nfsd4_compound_state {
  48         struct svc_fh           current_fh;
  49         struct svc_fh           save_fh;
  50         struct nfs4_stateowner  *replay_owner;
  51         /* For sessions DRC */
  52         struct nfsd4_session    *session;
  53         struct nfsd4_slot       *slot;
  54         __be32                  *statp;
  55         size_t                  iovlen;
  56         u32                     minorversion;
  57         u32                     status;
  58 };
  59
  60 static inline bool nfsd4_has_session(struct nfsd4_compound_state *cs)
  61 {
  62         return cs->slot != NULL;
  63 }
  64
  65 struct nfsd4_change_info {
  66         u32             atomic;
  67         bool            change_supported;
  68         u32             before_ctime_sec;
  69         u32             before_ctime_nsec;
  70         u64             before_change;
  71         u32             after_ctime_sec;
  72         u32             after_ctime_nsec;
  73         u64             after_change;
  74 };
  75
  76 struct nfsd4_access {
  77         u32             ac_req_access;      /* request */
  78         u32             ac_supported;       /* response */
  79         u32             ac_resp_access;     /* response */
  80 };
  81
  82 struct nfsd4_close {
  83         u32             cl_seqid;           /* request */
  84         stateid_t       cl_stateid;         /* request+response */
  85         struct nfs4_stateowner * cl_stateowner; /* response */
  86 };
  87
  88 struct nfsd4_commit {
  89         u64             co_offset;          /* request */
  90         u32             co_count;           /* request */
  91         nfs4_verifier   co_verf;            /* response */
  92 };
  93
  94 struct nfsd4_create {
  95         u32             cr_namelen;         /* request */
  96         char *          cr_name;            /* request */
  97         u32             cr_type;            /* request */
  98         union {                             /* request */
  99                 struct {
 100                         u32 namelen;
 101                         char *name;
 102                 } link;   /* NF4LNK */
 103                 struct {
 104                         u32 specdata1;
 105                         u32 specdata2;
 106                 } dev;    /* NF4BLK, NF4CHR */
 107         } u;
 108         u32             cr_bmval[3];        /* request */
 109         struct iattr    cr_iattr;           /* request */
 110         struct nfsd4_change_info  cr_cinfo; /* response */
 111         struct nfs4_acl *cr_acl;
 112 };
 113 #define cr_linklen      u.link.namelen
 114 #define cr_linkname     u.link.name
 115 #define cr_specdata1    u.dev.specdata1
 116 #define cr_specdata2    u.dev.specdata2
 117
 118 struct nfsd4_delegreturn {
 119         stateid_t       dr_stateid;
 120 };
 121
 122 struct nfsd4_getattr {
 123         u32             ga_bmval[3];        /* request */
 124         struct svc_fh   *ga_fhp;            /* response */
 125 };
 126
 127 struct nfsd4_link {
 128         u32             li_namelen;         /* request */
 129         char *          li_name;            /* request */
 130         struct nfsd4_change_info  li_cinfo; /* response */
 131 };
 132
 133 struct nfsd4_lock_denied {
 134         clientid_t      ld_clientid;
 135         struct nfs4_stateowner   *ld_sop;
 136         u64             ld_start;
 137         u64             ld_length;
 138         u32             ld_type;
 139 };
 140
 141 struct nfsd4_lock {
 142         /* request */
 143         u32             lk_type;
 144         u32             lk_reclaim;         /* boolean */
 145         u64             lk_offset;
 146         u64             lk_length;
 147         u32             lk_is_new;
 148         union {
 149                 struct {
 150                         u32             open_seqid;
 151                         stateid_t       open_stateid;
 152                         u32             lock_seqid;
 153                         clientid_t      clientid;
 154                         struct xdr_netobj owner;
 155                 } new;
 156                 struct {
 157                         stateid_t       lock_stateid;
 158                         u32             lock_seqid;
 159                 } old;
 160         } v;
 161
 162         /* response */
 163         union {
 164                 struct {
 165                         stateid_t               stateid;
 166                 } ok;
 167                 struct nfsd4_lock_denied        denied;
 168         } u;
 169         /* The lk_replay_owner is the open owner in the open_to_lock_owner
 170          * case and the lock owner otherwise: */
 171         struct nfs4_stateowner *lk_replay_owner;
 172 };
 173 #define lk_new_open_seqid       v.new.open_seqid
 174 #define lk_new_open_stateid     v.new.open_stateid
 175 #define lk_new_lock_seqid       v.new.lock_seqid
 176 #define lk_new_clientid         v.new.clientid
 177 #define lk_new_owner            v.new.owner
 178 #define lk_old_lock_stateid     v.old.lock_stateid
 179 #define lk_old_lock_seqid       v.old.lock_seqid
 180
 181 #define lk_rflags       u.ok.rflags
 182 #define lk_resp_stateid u.ok.stateid
 183 #define lk_denied       u.denied
 184
 185
 186 struct nfsd4_lockt {
 187         u32                             lt_type;
 188         clientid_t                      lt_clientid;
 189         struct xdr_netobj               lt_owner;
 190         u64                             lt_offset;
 191         u64                             lt_length;
 192         struct nfs4_stateowner *        lt_stateowner;
 193         struct nfsd4_lock_denied        lt_denied;
 194 };
 195
 196
 197 struct nfsd4_locku {
 198         u32             lu_type;
 199         u32             lu_seqid;
 200         stateid_t       lu_stateid;
 201         u64             lu_offset;
 202         u64             lu_length;
 203         struct nfs4_stateowner  *lu_stateowner;
 204 };
 205
 206
 207 struct nfsd4_lookup {
 208         u32             lo_len;             /* request */
 209         char *          lo_name;            /* request */
 210 };
 211
 212 struct nfsd4_putfh {
 213         u32             pf_fhlen;           /* request */
 214         char            *pf_fhval;          /* request */
 215 };
 216
 217 struct nfsd4_open {
 218         u32             op_claim_type;      /* request */
 219         struct xdr_netobj op_fname;         /* request - everything but CLAIM_PREV */
 220         u32             op_delegate_type;   /* request - CLAIM_PREV only */
 221         stateid_t       op_delegate_stateid; /* request - response */
 222         u32             op_create;          /* request */
 223         u32             op_createmode;      /* request */
 224         u32             op_bmval[3];        /* request */
 225         struct iattr    iattr;              /* UNCHECKED4, GUARDED4, EXCLUSIVE4_1 */
 226         nfs4_verifier   verf;               /* EXCLUSIVE4 */
 227         clientid_t      op_clientid;        /* request */
 228         struct xdr_netobj op_owner;           /* request */
 229         u32             op_seqid;           /* request */
 230         u32             op_share_access;    /* request */
 231         u32             op_share_deny;      /* request */
 232         stateid_t       op_stateid;         /* response */
 233         u32             op_recall;          /* recall */
 234         struct nfsd4_change_info  op_cinfo; /* response */
 235         u32             op_rflags;          /* response */
 236         int             op_truncate;        /* used during processing */
 237         struct nfs4_stateowner *op_stateowner; /* used during processing */
 238         struct nfs4_acl *op_acl;
 239 };
 240 #define op_iattr        iattr
 241 #define op_verf         verf
 242
 243 struct nfsd4_open_confirm {
 244         stateid_t       oc_req_stateid          /* request */;
 245         u32             oc_seqid                /* request */;
 246         stateid_t       oc_resp_stateid         /* response */;
 247         struct nfs4_stateowner * oc_stateowner; /* response */
 248 };
 249
 250 struct nfsd4_open_downgrade {
 251         stateid_t       od_stateid;
 252         u32             od_seqid;
 253         u32             od_share_access;
 254         u32             od_share_deny;
 255         struct nfs4_stateowner *od_stateowner;
 256 };
 257
 258
 259 struct nfsd4_read {
 260         stateid_t       rd_stateid;         /* request */
 261         u64             rd_offset;          /* request */
 262         u32             rd_length;          /* request */
 263         int             rd_vlen;
 264         struct file     *rd_filp;
 265
 266         struct svc_rqst *rd_rqstp;          /* response */
 267         struct svc_fh * rd_fhp;             /* response */
 268 };
 269
 270 struct nfsd4_readdir {
 271         u64             rd_cookie;          /* request */
 272         nfs4_verifier   rd_verf;            /* request */
 273         u32             rd_dircount;        /* request */
 274         u32             rd_maxcount;        /* request */
 275         u32             rd_bmval[3];        /* request */
 276         struct svc_rqst *rd_rqstp;          /* response */
 277         struct svc_fh * rd_fhp;             /* response */
 278
 279         struct readdir_cd       common;
 280         __be32 *                buffer;
 281         int                     buflen;
 282         __be32 *                offset;
 283 };
 284
 285 struct nfsd4_release_lockowner {
 286         clientid_t        rl_clientid;
 287         struct xdr_netobj rl_owner;
 288 };
 289 struct nfsd4_readlink {
 290         struct svc_rqst *rl_rqstp;          /* request */
 291         struct svc_fh * rl_fhp;             /* request */
 292 };
 293
 294 struct nfsd4_remove {
 295         u32             rm_namelen;         /* request */
 296         char *          rm_name;            /* request */
 297         struct nfsd4_change_info  rm_cinfo; /* response */
 298 };
 299
 300 struct nfsd4_rename {
 301         u32             rn_snamelen;        /* request */
 302         char *          rn_sname;           /* request */
 303         u32             rn_tnamelen;        /* request */
 304         char *          rn_tname;           /* request */
 305         struct nfsd4_change_info  rn_sinfo; /* response */
 306         struct nfsd4_change_info  rn_tinfo; /* response */
 307 };
 308
 309 struct nfsd4_secinfo {
 310         u32 si_namelen;                                 /* request */
 311         char *si_name;                                  /* request */
 312         struct svc_export *si_exp;                      /* response */
 313 };
 314
 315 struct nfsd4_setattr {
 316         stateid_t       sa_stateid;         /* request */
 317         u32             sa_bmval[3];        /* request */
 318         struct iattr    sa_iattr;           /* request */
 319         struct nfs4_acl *sa_acl;
 320 };
 321
 322 struct nfsd4_setclientid {
 323         nfs4_verifier   se_verf;            /* request */
 324         u32             se_namelen;         /* request */
 325         char *          se_name;            /* request */
 326         u32             se_callback_prog;   /* request */
 327         u32             se_callback_netid_len;  /* request */
 328         char *          se_callback_netid_val;  /* request */
 329         u32             se_callback_addr_len;   /* request */
 330         char *          se_callback_addr_val;   /* request */
 331         u32             se_callback_ident;  /* request */
 332         clientid_t      se_clientid;        /* response */
 333         nfs4_verifier   se_confirm;         /* response */
 334 };
 335
 336 struct nfsd4_setclientid_confirm {
 337         clientid_t      sc_clientid;
 338         nfs4_verifier   sc_confirm;
 339 };
 340
 341 /* also used for NVERIFY */
 342 struct nfsd4_verify {
 343         u32             ve_bmval[3];        /* request */
 344         u32             ve_attrlen;         /* request */
 345         char *          ve_attrval;         /* request */
 346 };
 347
 348 struct nfsd4_write {
 349         stateid_t       wr_stateid;         /* request */
 350         u64             wr_offset;          /* request */
 351         u32             wr_stable_how;      /* request */
 352         u32             wr_buflen;          /* request */
 353         int             wr_vlen;
 354
 355         u32             wr_bytes_written;   /* response */
 356         u32             wr_how_written;     /* response */
 357         nfs4_verifier   wr_verifier;        /* response */
 358 };
 359
 360 struct nfsd4_exchange_id {
 361         nfs4_verifier   verifier;
 362         struct xdr_netobj clname;
 363         u32             flags;
 364         clientid_t      clientid;
 365         u32             seqid;
 366         int             spa_how;
 367 };
 368
 369 struct nfsd4_channel_attrs {
 370         u32             headerpadsz;
 371         u32             maxreq_sz;
 372         u32             maxresp_sz;
 373         u32             maxresp_cached;
 374         u32             maxops;
 375         u32             maxreqs;
 376         u32             nr_rdma_attrs;
 377         u32             rdma_attrs;
 378 };
 379
 380 struct nfsd4_create_session {
 381         clientid_t              clientid;
 382         struct nfs4_sessionid   sessionid;
 383         u32                     seqid;
 384         u32                     flags;
 385         struct nfsd4_channel_attrs fore_channel;
 386         struct nfsd4_channel_attrs back_channel;
 387         u32                     callback_prog;
 388         u32                     uid;
 389         u32                     gid;
 390 };
 391
 392 struct nfsd4_sequence {
 393         struct nfs4_sessionid   sessionid;              /* request/response */
 394         u32                     seqid;                  /* request/response */
 395         u32                     slotid;                 /* request/response */
 396         u32                     maxslots;               /* request/response */
 397         u32                     cachethis;              /* request */
 398 #if 0
 399         u32                     target_maxslots;        /* response */
 400         u32                     status_flags;           /* response */
 401 #endif /* not yet */
 402 };
 403
 404 struct nfsd4_destroy_session {
 405         struct nfs4_sessionid   sessionid;
 406 };
 407
 408 struct nfsd4_op {
 409         int                                     opnum;
 410         __be32                                  status;
 411         union {
 412                 struct nfsd4_access             access;
 413                 struct nfsd4_close              close;
 414                 struct nfsd4_commit             commit;
 415                 struct nfsd4_create             create;
 416                 struct nfsd4_delegreturn        delegreturn;
 417                 struct nfsd4_getattr            getattr;
 418                 struct svc_fh *                 getfh;
 419                 struct nfsd4_link               link;
 420                 struct nfsd4_lock               lock;
 421                 struct nfsd4_lockt              lockt;
 422                 struct nfsd4_locku              locku;
 423                 struct nfsd4_lookup             lookup;
 424                 struct nfsd4_verify             nverify;
 425                 struct nfsd4_open               open;
 426                 struct nfsd4_open_confirm       open_confirm;
 427                 struct nfsd4_open_downgrade     open_downgrade;
 428                 struct nfsd4_putfh              putfh;
 429                 struct nfsd4_read               read;
 430                 struct nfsd4_readdir            readdir;
 431                 struct nfsd4_readlink           readlink;
 432                 struct nfsd4_remove             remove;
 433                 struct nfsd4_rename             rename;
 434                 clientid_t                      renew;
 435                 struct nfsd4_secinfo            secinfo;
 436                 struct nfsd4_setattr            setattr;
 437                 struct nfsd4_setclientid        setclientid;
 438                 struct nfsd4_setclientid_confirm setclientid_confirm;
 439                 struct nfsd4_verify             verify;
 440                 struct nfsd4_write              write;
 441                 struct nfsd4_release_lockowner  release_lockowner;
 442
 443                 /* NFSv4.1 */
 444                 struct nfsd4_exchange_id        exchange_id;
 445                 struct nfsd4_create_session     create_session;
 446                 struct nfsd4_destroy_session    destroy_session;
 447                 struct nfsd4_sequence           sequence;
 448         } u;
 449         struct nfs4_replay *                    replay;
 450 };
 451
 452 struct nfsd4_compoundargs {
 453         /* scratch variables for XDR decode */
 454         __be32 *                        p;
 455         __be32 *                        end;
 456         struct page **                  pagelist;
 457         int                             pagelen;
 458         __be32                          tmp[8];
 459         __be32 *                        tmpp;
 460         struct tmpbuf {
 461                 struct tmpbuf *next;
 462                 void (*release)(const void *);
 463                 void *buf;
 464         }                               *to_free;
 465
 466         struct svc_rqst                 *rqstp;
 467
 468         u32                             taglen;
 469         char *                          tag;
 470         u32                             minorversion;
 471         u32                             opcnt;
 472         struct nfsd4_op                 *ops;
 473         struct nfsd4_op                 iops[8];
 474 };
 475
 476 struct nfsd4_compoundres {
 477         /* scratch variables for XDR encode */
 478         __be32 *                        p;
 479         __be32 *                        end;
 480         struct xdr_buf *                xbuf;
 481         struct svc_rqst *               rqstp;
 482
 483         u32                             taglen;
 484         char *                          tag;
 485         u32                             opcnt;
 486         __be32 *                        tagp; /* tag, opcount encode location */
 487         struct nfsd4_compound_state     cstate;
 488 };
 489
 490 static inline bool nfsd4_is_solo_sequence(struct nfsd4_compoundres *resp)
 491 {
 492         struct nfsd4_compoundargs *args = resp->rqstp->rq_argp;
 493         return args->opcnt == 1;
 494 }
 495
 496 static inline bool nfsd4_not_cached(struct nfsd4_compoundres *resp)
 497 {
 498         return !resp->cstate.slot->sl_cache_entry.ce_cachethis ||
 499                         nfsd4_is_solo_sequence(resp);
 500 }
 501
 502 #define NFS4_SVC_XDRSIZE                sizeof(struct nfsd4_compoundargs)
 503
 504 static inline void
 505 set_change_info(struct nfsd4_change_info *cinfo, struct svc_fh *fhp)
 506 {
 507         BUG_ON(!fhp->fh_pre_saved || !fhp->fh_post_saved);
 508         cinfo->atomic = 1;
 509         cinfo->change_supported = IS_I_VERSION(fhp->fh_dentry->d_inode);
 510         if (cinfo->change_supported) {
 511                 cinfo->before_change = fhp->fh_pre_change;
 512                 cinfo->after_change = fhp->fh_post_change;
 513         } else {
 514                 cinfo->before_ctime_sec = fhp->fh_pre_ctime.tv_sec;
 515                 cinfo->before_ctime_nsec = fhp->fh_pre_ctime.tv_nsec;
 516                 cinfo->after_ctime_sec = fhp->fh_post_attr.ctime.tv_sec;
 517                 cinfo->after_ctime_nsec = fhp->fh_post_attr.ctime.tv_nsec;
 518         }
 519 }
 520
 521 int nfs4svc_encode_voidres(struct svc_rqst *, __be32 *, void *);
 522 int nfs4svc_decode_compoundargs(struct svc_rqst *, __be32 *,
 523                 struct nfsd4_compoundargs *);
 524 int nfs4svc_encode_compoundres(struct svc_rqst *, __be32 *,
 525                 struct nfsd4_compoundres *);
 526 void nfsd4_encode_operation(struct nfsd4_compoundres *, struct nfsd4_op *);
 527 void nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op);
 528 __be32 nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
 529                        struct dentry *dentry, __be32 *buffer, int *countp,
 530                        u32 *bmval, struct svc_rqst *, int ignore_crossmnt);
 531 extern __be32 nfsd4_setclientid(struct svc_rqst *rqstp,
 532                 struct nfsd4_compound_state *,
 533                 struct nfsd4_setclientid *setclid);
 534 extern __be32 nfsd4_setclientid_confirm(struct svc_rqst *rqstp,
 535                 struct nfsd4_compound_state *,
 536                 struct nfsd4_setclientid_confirm *setclientid_confirm);
 537 extern void nfsd4_store_cache_entry(struct nfsd4_compoundres *resp);
 538 extern __be32 nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp,
 539                 struct nfsd4_sequence *seq);
 540 extern __be32 nfsd4_exchange_id(struct svc_rqst *rqstp,
 541                 struct nfsd4_compound_state *,
 542 struct nfsd4_exchange_id *);
 543                 extern __be32 nfsd4_create_session(struct svc_rqst *,
 544                 struct nfsd4_compound_state *,
 545                 struct nfsd4_create_session *);
 546 extern __be32 nfsd4_sequence(struct svc_rqst *,
 547                 struct nfsd4_compound_state *,
 548                 struct nfsd4_sequence *);
 549 extern __be32 nfsd4_destroy_session(struct svc_rqst *,
 550                 struct nfsd4_compound_state *,
 551                 struct nfsd4_destroy_session *);
 552 extern __be32 nfsd4_process_open1(struct nfsd4_compound_state *,
 553                 struct nfsd4_open *open);
 554 extern __be32 nfsd4_process_open2(struct svc_rqst *rqstp,
 555                 struct svc_fh *current_fh, struct nfsd4_open *open);
 556 extern __be32 nfsd4_open_confirm(struct svc_rqst *rqstp,
 557                 struct nfsd4_compound_state *, struct nfsd4_open_confirm *oc);
 558 extern __be32 nfsd4_close(struct svc_rqst *rqstp,
 559                 struct nfsd4_compound_state *,
 560                 struct nfsd4_close *close);
 561 extern __be32 nfsd4_open_downgrade(struct svc_rqst *rqstp,
 562                 struct nfsd4_compound_state *,
 563                 struct nfsd4_open_downgrade *od);
 564 extern __be32 nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *,
 565                 struct nfsd4_lock *lock);
 566 extern __be32 nfsd4_lockt(struct svc_rqst *rqstp,
 567                 struct nfsd4_compound_state *,
 568                 struct nfsd4_lockt *lockt);
 569 extern __be32 nfsd4_locku(struct svc_rqst *rqstp,
 570                 struct nfsd4_compound_state *,
 571                 struct nfsd4_locku *locku);
 572 extern __be32
 573 nfsd4_release_lockowner(struct svc_rqst *rqstp,
 574                 struct nfsd4_compound_state *,
 575                 struct nfsd4_release_lockowner *rlockowner);
 576 extern void nfsd4_release_compoundargs(struct nfsd4_compoundargs *);
 577 extern __be32 nfsd4_delegreturn(struct svc_rqst *rqstp,
 578                 struct nfsd4_compound_state *, struct nfsd4_delegreturn *dr);
 579 extern __be32 nfsd4_renew(struct svc_rqst *rqstp,
 580                           struct nfsd4_compound_state *, clientid_t *clid);
 581 #endif
 582
 583 /*
 584  * Local variables:
 585  *  c-basic-offset: 8
 586  * End:
 587  */