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 #define CURRENT_STATE_ID_FLAG (1<<0)
  47 #define SAVED_STATE_ID_FLAG (1<<1)
  48
  49 #define SET_CSTATE_FLAG(c, f) ((c)->sid_flags |= (f))
  50 #define HAS_CSTATE_FLAG(c, f) ((c)->sid_flags & (f))
  51 #define CLEAR_CSTATE_FLAG(c, f) ((c)->sid_flags &= ~(f))
  52
  53 /**
  54  * nfsd4_encode_bool - Encode an XDR bool type result
  55  * @xdr: target XDR stream
  56  * @val: boolean value to encode
  57  *
  58  * Return values:
  59  *    %nfs_ok: @val encoded; @xdr advanced to next position
  60  *    %nfserr_resource: stream buffer space exhausted
  61  */
  62 static __always_inline __be32
  63 nfsd4_encode_bool(struct xdr_stream *xdr, bool val)
  64 {
  65         __be32 *p = xdr_reserve_space(xdr, XDR_UNIT);
  66
  67         if (unlikely(p == NULL))
  68                 return nfserr_resource;
  69         *p = val ? xdr_one : xdr_zero;
  70         return nfs_ok;
  71 }
  72
  73 /**
  74  * nfsd4_encode_uint32_t - Encode an XDR uint32_t type result
  75  * @xdr: target XDR stream
  76  * @val: integer value to encode
  77  *
  78  * Return values:
  79  *    %nfs_ok: @val encoded; @xdr advanced to next position
  80  *    %nfserr_resource: stream buffer space exhausted
  81  */
  82 static __always_inline __be32
  83 nfsd4_encode_uint32_t(struct xdr_stream *xdr, u32 val)
  84 {
  85         __be32 *p = xdr_reserve_space(xdr, XDR_UNIT);
  86
  87         if (unlikely(p == NULL))
  88                 return nfserr_resource;
  89         *p = cpu_to_be32(val);
  90         return nfs_ok;
  91 }
  92
  93 #define nfsd4_encode_aceflag4(x, v)     nfsd4_encode_uint32_t(x, v)
  94 #define nfsd4_encode_acemask4(x, v)     nfsd4_encode_uint32_t(x, v)
  95 #define nfsd4_encode_acetype4(x, v)     nfsd4_encode_uint32_t(x, v)
  96 #define nfsd4_encode_count4(x, v)       nfsd4_encode_uint32_t(x, v)
  97 #define nfsd4_encode_mode4(x, v)        nfsd4_encode_uint32_t(x, v)
  98 #define nfsd4_encode_nfs_lease4(x, v)   nfsd4_encode_uint32_t(x, v)
  99 #define nfsd4_encode_qop4(x, v)         nfsd4_encode_uint32_t(x, v)
 100 #define nfsd4_encode_sequenceid4(x, v)  nfsd4_encode_uint32_t(x, v)
 101 #define nfsd4_encode_slotid4(x, v)      nfsd4_encode_uint32_t(x, v)
 102
 103 /**
 104  * nfsd4_encode_uint64_t - Encode an XDR uint64_t type result
 105  * @xdr: target XDR stream
 106  * @val: integer value to encode
 107  *
 108  * Return values:
 109  *    %nfs_ok: @val encoded; @xdr advanced to next position
 110  *    %nfserr_resource: stream buffer space exhausted
 111  */
 112 static __always_inline __be32
 113 nfsd4_encode_uint64_t(struct xdr_stream *xdr, u64 val)
 114 {
 115         __be32 *p = xdr_reserve_space(xdr, XDR_UNIT * 2);
 116
 117         if (unlikely(p == NULL))
 118                 return nfserr_resource;
 119         put_unaligned_be64(val, p);
 120         return nfs_ok;
 121 }
 122
 123 #define nfsd4_encode_changeid4(x, v)    nfsd4_encode_uint64_t(x, v)
 124 #define nfsd4_encode_nfs_cookie4(x, v)  nfsd4_encode_uint64_t(x, v)
 125 #define nfsd4_encode_length4(x, v)      nfsd4_encode_uint64_t(x, v)
 126 #define nfsd4_encode_offset4(x, v)      nfsd4_encode_uint64_t(x, v)
 127
 128 /**
 129  * nfsd4_encode_opaque_fixed - Encode a fixed-length XDR opaque type result
 130  * @xdr: target XDR stream
 131  * @data: pointer to data
 132  * @size: length of data in bytes
 133  *
 134  * Return values:
 135  *    %nfs_ok: @data encoded; @xdr advanced to next position
 136  *    %nfserr_resource: stream buffer space exhausted
 137  */
 138 static __always_inline __be32
 139 nfsd4_encode_opaque_fixed(struct xdr_stream *xdr, const void *data,
 140                           size_t size)
 141 {
 142         __be32 *p = xdr_reserve_space(xdr, xdr_align_size(size));
 143         size_t pad = xdr_pad_size(size);
 144
 145         if (unlikely(p == NULL))
 146                 return nfserr_resource;
 147         memcpy(p, data, size);
 148         if (pad)
 149                 memset((char *)p + size, 0, pad);
 150         return nfs_ok;
 151 }
 152
 153 /**
 154  * nfsd4_encode_opaque - Encode a variable-length XDR opaque type result
 155  * @xdr: target XDR stream
 156  * @data: pointer to data
 157  * @size: length of data in bytes
 158  *
 159  * Return values:
 160  *    %nfs_ok: @data encoded; @xdr advanced to next position
 161  *    %nfserr_resource: stream buffer space exhausted
 162  */
 163 static __always_inline __be32
 164 nfsd4_encode_opaque(struct xdr_stream *xdr, const void *data, size_t size)
 165 {
 166         size_t pad = xdr_pad_size(size);
 167         __be32 *p;
 168
 169         p = xdr_reserve_space(xdr, XDR_UNIT + xdr_align_size(size));
 170         if (unlikely(p == NULL))
 171                 return nfserr_resource;
 172         *p++ = cpu_to_be32(size);
 173         memcpy(p, data, size);
 174         if (pad)
 175                 memset((char *)p + size, 0, pad);
 176         return nfs_ok;
 177 }
 178
 179 #define nfsd4_encode_component4(x, d, s)        nfsd4_encode_opaque(x, d, s)
 180
 181 struct nfsd4_compound_state {
 182         struct svc_fh           current_fh;
 183         struct svc_fh           save_fh;
 184         struct nfs4_stateowner  *replay_owner;
 185         struct nfs4_client      *clp;
 186         /* For sessions DRC */
 187         struct nfsd4_session    *session;
 188         struct nfsd4_slot       *slot;
 189         int                     data_offset;
 190         bool                    spo_must_allowed;
 191         size_t                  iovlen;
 192         u32                     minorversion;
 193         __be32                  status;
 194         stateid_t       current_stateid;
 195         stateid_t       save_stateid;
 196         /* to indicate current and saved state id presents */
 197         u32             sid_flags;
 198 };
 199
 200 static inline bool nfsd4_has_session(struct nfsd4_compound_state *cs)
 201 {
 202         return cs->slot != NULL;
 203 }
 204
 205 struct nfsd4_change_info {
 206         u32             atomic;
 207         u64             before_change;
 208         u64             after_change;
 209 };
 210
 211 struct nfsd4_access {
 212         u32             ac_req_access;      /* request */
 213         u32             ac_supported;       /* response */
 214         u32             ac_resp_access;     /* response */
 215 };
 216
 217 struct nfsd4_close {
 218         u32             cl_seqid;           /* request */
 219         stateid_t       cl_stateid;         /* request+response */
 220 };
 221
 222 struct nfsd4_commit {
 223         u64             co_offset;          /* request */
 224         u32             co_count;           /* request */
 225         nfs4_verifier   co_verf;            /* response */
 226 };
 227
 228 struct nfsd4_create {
 229         u32             cr_namelen;         /* request */
 230         char *          cr_name;            /* request */
 231         u32             cr_type;            /* request */
 232         union {                             /* request */
 233                 struct {
 234                         u32 datalen;
 235                         char *data;
 236                         struct kvec first;
 237                 } link;   /* NF4LNK */
 238                 struct {
 239                         u32 specdata1;
 240                         u32 specdata2;
 241                 } dev;    /* NF4BLK, NF4CHR */
 242         } u;
 243         u32             cr_bmval[3];        /* request */
 244         struct iattr    cr_iattr;           /* request */
 245         int             cr_umask;           /* request */
 246         struct nfsd4_change_info  cr_cinfo; /* response */
 247         struct nfs4_acl *cr_acl;
 248         struct xdr_netobj cr_label;
 249 };
 250 #define cr_datalen      u.link.datalen
 251 #define cr_data         u.link.data
 252 #define cr_first        u.link.first
 253 #define cr_specdata1    u.dev.specdata1
 254 #define cr_specdata2    u.dev.specdata2
 255
 256 struct nfsd4_delegreturn {
 257         stateid_t       dr_stateid;
 258 };
 259
 260 struct nfsd4_getattr {
 261         u32             ga_bmval[3];        /* request */
 262         struct svc_fh   *ga_fhp;            /* response */
 263 };
 264
 265 struct nfsd4_link {
 266         u32             li_namelen;         /* request */
 267         char *          li_name;            /* request */
 268         struct nfsd4_change_info  li_cinfo; /* response */
 269 };
 270
 271 struct nfsd4_lock_denied {
 272         clientid_t      ld_clientid;
 273         struct xdr_netobj       ld_owner;
 274         u64             ld_start;
 275         u64             ld_length;
 276         u32             ld_type;
 277 };
 278
 279 struct nfsd4_lock {
 280         /* request */
 281         u32             lk_type;
 282         u32             lk_reclaim;         /* boolean */
 283         u64             lk_offset;
 284         u64             lk_length;
 285         u32             lk_is_new;
 286         union {
 287                 struct {
 288                         u32             open_seqid;
 289                         stateid_t       open_stateid;
 290                         u32             lock_seqid;
 291                         clientid_t      clientid;
 292                         struct xdr_netobj owner;
 293                 } new;
 294                 struct {
 295                         stateid_t       lock_stateid;
 296                         u32             lock_seqid;
 297                 } old;
 298         } v;
 299
 300         /* response */
 301         stateid_t                       lk_resp_stateid;
 302         struct nfsd4_lock_denied        lk_denied;
 303 };
 304 #define lk_new_open_seqid       v.new.open_seqid
 305 #define lk_new_open_stateid     v.new.open_stateid
 306 #define lk_new_lock_seqid       v.new.lock_seqid
 307 #define lk_new_clientid         v.new.clientid
 308 #define lk_new_owner            v.new.owner
 309 #define lk_old_lock_stateid     v.old.lock_stateid
 310 #define lk_old_lock_seqid       v.old.lock_seqid
 311
 312 struct nfsd4_lockt {
 313         u32                             lt_type;
 314         clientid_t                      lt_clientid;
 315         struct xdr_netobj               lt_owner;
 316         u64                             lt_offset;
 317         u64                             lt_length;
 318         struct nfsd4_lock_denied        lt_denied;
 319 };
 320
 321 struct nfsd4_locku {
 322         u32             lu_type;
 323         u32             lu_seqid;
 324         stateid_t       lu_stateid;
 325         u64             lu_offset;
 326         u64             lu_length;
 327 };
 328
 329
 330 struct nfsd4_lookup {
 331         u32             lo_len;             /* request */
 332         char *          lo_name;            /* request */
 333 };
 334
 335 struct nfsd4_putfh {
 336         u32             pf_fhlen;           /* request */
 337         char            *pf_fhval;          /* request */
 338         bool            no_verify;          /* represents foreigh fh */
 339 };
 340
 341 struct nfsd4_getxattr {
 342         char            *getxa_name;            /* request */
 343         u32             getxa_len;              /* request */
 344         void            *getxa_buf;
 345 };
 346
 347 struct nfsd4_setxattr {
 348         u32             setxa_flags;            /* request */
 349         char            *setxa_name;            /* request */
 350         char            *setxa_buf;             /* request */
 351         u32             setxa_len;              /* request */
 352         struct nfsd4_change_info  setxa_cinfo;  /* response */
 353 };
 354
 355 struct nfsd4_removexattr {
 356         char            *rmxa_name;             /* request */
 357         struct nfsd4_change_info  rmxa_cinfo;   /* response */
 358 };
 359
 360 struct nfsd4_listxattrs {
 361         u64             lsxa_cookie;            /* request */
 362         u32             lsxa_maxcount;          /* request */
 363         char            *lsxa_buf;              /* unfiltered buffer (reply) */
 364         u32             lsxa_len;               /* unfiltered len (reply) */
 365 };
 366
 367 struct nfsd4_open {
 368         u32             op_claim_type;      /* request */
 369         u32             op_fnamelen;
 370         char *          op_fname;           /* request - everything but CLAIM_PREV */
 371         u32             op_delegate_type;   /* request - CLAIM_PREV only */
 372         stateid_t       op_delegate_stateid; /* request - response */
 373         u32             op_why_no_deleg;    /* response - DELEG_NONE_EXT only */
 374         u32             op_create;          /* request */
 375         u32             op_createmode;      /* request */
 376         int             op_umask;           /* request */
 377         u32             op_bmval[3];        /* request */
 378         struct iattr    op_iattr;           /* UNCHECKED4, GUARDED4, EXCLUSIVE4_1 */
 379         nfs4_verifier   op_verf __attribute__((aligned(32)));
 380                                             /* EXCLUSIVE4 */
 381         clientid_t      op_clientid;        /* request */
 382         struct xdr_netobj op_owner;           /* request */
 383         u32             op_seqid;           /* request */
 384         u32             op_share_access;    /* request */
 385         u32             op_share_deny;      /* request */
 386         u32             op_deleg_want;      /* request */
 387         stateid_t       op_stateid;         /* response */
 388         __be32          op_xdr_error;       /* see nfsd4_open_omfg() */
 389         struct nfsd4_change_info  op_cinfo; /* response */
 390         u32             op_rflags;          /* response */
 391         bool            op_recall;          /* response */
 392         bool            op_truncate;        /* used during processing */
 393         bool            op_created;         /* used during processing */
 394         struct nfs4_openowner *op_openowner; /* used during processing */
 395         struct file     *op_filp;           /* used during processing */
 396         struct nfs4_file *op_file;          /* used during processing */
 397         struct nfs4_ol_stateid *op_stp;     /* used during processing */
 398         struct nfs4_clnt_odstate *op_odstate; /* used during processing */
 399         struct nfs4_acl *op_acl;
 400         struct xdr_netobj op_label;
 401         struct svc_rqst *op_rqstp;
 402 };
 403
 404 struct nfsd4_open_confirm {
 405         stateid_t       oc_req_stateid          /* request */;
 406         u32             oc_seqid                /* request */;
 407         stateid_t       oc_resp_stateid         /* response */;
 408 };
 409
 410 struct nfsd4_open_downgrade {
 411         stateid_t       od_stateid;
 412         u32             od_seqid;
 413         u32             od_share_access;        /* request */
 414         u32             od_deleg_want;          /* request */
 415         u32             od_share_deny;          /* request */
 416 };
 417
 418
 419 struct nfsd4_read {
 420         stateid_t               rd_stateid;         /* request */
 421         u64                     rd_offset;          /* request */
 422         u32                     rd_length;          /* request */
 423         int                     rd_vlen;
 424         struct nfsd_file        *rd_nf;
 425
 426         struct svc_rqst         *rd_rqstp;          /* response */
 427         struct svc_fh           *rd_fhp;            /* response */
 428         u32                     rd_eof;             /* response */
 429 };
 430
 431 struct nfsd4_readdir {
 432         u64             rd_cookie;          /* request */
 433         nfs4_verifier   rd_verf;            /* request */
 434         u32             rd_dircount;        /* request */
 435         u32             rd_maxcount;        /* request */
 436         u32             rd_bmval[3];        /* request */
 437         struct svc_rqst *rd_rqstp;          /* response */
 438         struct svc_fh * rd_fhp;             /* response */
 439
 440         struct readdir_cd       common;
 441         struct xdr_stream       *xdr;
 442         int                     cookie_offset;
 443 };
 444
 445 struct nfsd4_release_lockowner {
 446         clientid_t        rl_clientid;
 447         struct xdr_netobj rl_owner;
 448 };
 449 struct nfsd4_readlink {
 450         struct svc_rqst *rl_rqstp;          /* request */
 451         struct svc_fh * rl_fhp;             /* request */
 452 };
 453
 454 struct nfsd4_remove {
 455         u32             rm_namelen;         /* request */
 456         char *          rm_name;            /* request */
 457         struct nfsd4_change_info  rm_cinfo; /* response */
 458 };
 459
 460 struct nfsd4_rename {
 461         u32             rn_snamelen;        /* request */
 462         char *          rn_sname;           /* request */
 463         u32             rn_tnamelen;        /* request */
 464         char *          rn_tname;           /* request */
 465         struct nfsd4_change_info  rn_sinfo; /* response */
 466         struct nfsd4_change_info  rn_tinfo; /* response */
 467 };
 468
 469 struct nfsd4_secinfo {
 470         u32 si_namelen;                                 /* request */
 471         char *si_name;                                  /* request */
 472         struct svc_export *si_exp;                      /* response */
 473 };
 474
 475 struct nfsd4_secinfo_no_name {
 476         u32 sin_style;                                  /* request */
 477         struct svc_export *sin_exp;                     /* response */
 478 };
 479
 480 struct nfsd4_setattr {
 481         stateid_t       sa_stateid;         /* request */
 482         u32             sa_bmval[3];        /* request */
 483         struct iattr    sa_iattr;           /* request */
 484         struct nfs4_acl *sa_acl;
 485         struct xdr_netobj sa_label;
 486 };
 487
 488 struct nfsd4_setclientid {
 489         nfs4_verifier   se_verf;            /* request */
 490         struct xdr_netobj se_name;
 491         u32             se_callback_prog;   /* request */
 492         u32             se_callback_netid_len;  /* request */
 493         char *          se_callback_netid_val;  /* request */
 494         u32             se_callback_addr_len;   /* request */
 495         char *          se_callback_addr_val;   /* request */
 496         u32             se_callback_ident;  /* request */
 497         clientid_t      se_clientid;        /* response */
 498         nfs4_verifier   se_confirm;         /* response */
 499 };
 500
 501 struct nfsd4_setclientid_confirm {
 502         clientid_t      sc_clientid;
 503         nfs4_verifier   sc_confirm;
 504 };
 505
 506 struct nfsd4_test_stateid_id {
 507         __be32                  ts_id_status;
 508         stateid_t               ts_id_stateid;
 509         struct list_head        ts_id_list;
 510 };
 511
 512 struct nfsd4_test_stateid {
 513         u32             ts_num_ids;
 514         struct list_head ts_stateid_list;
 515 };
 516
 517 struct nfsd4_free_stateid {
 518         stateid_t       fr_stateid;         /* request */
 519 };
 520
 521 struct nfsd4_get_dir_delegation {
 522         /* request */
 523         u32                     gdda_signal_deleg_avail;
 524         u32                     gdda_notification_types[1];
 525         struct timespec64       gdda_child_attr_delay;
 526         struct timespec64       gdda_dir_attr_delay;
 527         u32                     gdda_child_attributes[3];
 528         u32                     gdda_dir_attributes[3];
 529         /* response */
 530         u32                     gddrnf_status;
 531         nfs4_verifier           gddr_cookieverf;
 532         stateid_t               gddr_stateid;
 533         u32                     gddr_notification[1];
 534         u32                     gddr_child_attributes[3];
 535         u32                     gddr_dir_attributes[3];
 536         bool                    gddrnf_will_signal_deleg_avail;
 537 };
 538
 539 /* also used for NVERIFY */
 540 struct nfsd4_verify {
 541         u32             ve_bmval[3];        /* request */
 542         u32             ve_attrlen;         /* request */
 543         char *          ve_attrval;         /* request */
 544 };
 545
 546 struct nfsd4_write {
 547         stateid_t       wr_stateid;         /* request */
 548         u64             wr_offset;          /* request */
 549         u32             wr_stable_how;      /* request */
 550         u32             wr_buflen;          /* request */
 551         struct xdr_buf  wr_payload;         /* request */
 552
 553         u32             wr_bytes_written;   /* response */
 554         u32             wr_how_written;     /* response */
 555         nfs4_verifier   wr_verifier;        /* response */
 556 };
 557
 558 struct nfsd4_exchange_id {
 559         nfs4_verifier   verifier;
 560         struct xdr_netobj clname;
 561         u32             flags;
 562         clientid_t      clientid;
 563         u32             seqid;
 564         u32             spa_how;
 565         u32             spo_must_enforce[3];
 566         u32             spo_must_allow[3];
 567         struct xdr_netobj nii_domain;
 568         struct xdr_netobj nii_name;
 569         struct timespec64 nii_time;
 570 };
 571
 572 struct nfsd4_sequence {
 573         struct nfs4_sessionid   sessionid;              /* request/response */
 574         u32                     seqid;                  /* request/response */
 575         u32                     slotid;                 /* request/response */
 576         u32                     maxslots;               /* request/response */
 577         u32                     cachethis;              /* request */
 578 #if 0
 579         u32                     target_maxslots;        /* response */
 580 #endif /* not yet */
 581         u32                     status_flags;           /* response */
 582 };
 583
 584 struct nfsd4_destroy_session {
 585         struct nfs4_sessionid   sessionid;
 586 };
 587
 588 struct nfsd4_destroy_clientid {
 589         clientid_t clientid;
 590 };
 591
 592 struct nfsd4_reclaim_complete {
 593         u32 rca_one_fs;
 594 };
 595
 596 struct nfsd4_deviceid {
 597         u64                     fsid_idx;
 598         u32                     generation;
 599         u32                     pad;
 600 };
 601
 602 struct nfsd4_layout_seg {
 603         u32                     iomode;
 604         u64                     offset;
 605         u64                     length;
 606 };
 607
 608 struct nfsd4_getdeviceinfo {
 609         struct nfsd4_deviceid   gd_devid;       /* request */
 610         u32                     gd_layout_type; /* request */
 611         u32                     gd_maxcount;    /* request */
 612         u32                     gd_notify_types;/* request - response */
 613         void                    *gd_device;     /* response */
 614 };
 615
 616 struct nfsd4_layoutget {
 617         u64                     lg_minlength;   /* request */
 618         u32                     lg_signal;      /* request */
 619         u32                     lg_layout_type; /* request */
 620         u32                     lg_maxcount;    /* request */
 621         stateid_t               lg_sid;         /* request/response */
 622         struct nfsd4_layout_seg lg_seg;         /* request/response */
 623         void                    *lg_content;    /* response */
 624 };
 625
 626 struct nfsd4_layoutcommit {
 627         stateid_t               lc_sid;         /* request */
 628         struct nfsd4_layout_seg lc_seg;         /* request */
 629         u32                     lc_reclaim;     /* request */
 630         u32                     lc_newoffset;   /* request */
 631         u64                     lc_last_wr;     /* request */
 632         struct timespec64       lc_mtime;       /* request */
 633         u32                     lc_layout_type; /* request */
 634         u32                     lc_up_len;      /* layout length */
 635         void                    *lc_up_layout;  /* decoded by callback */
 636         bool                    lc_size_chg;    /* response */
 637         u64                     lc_newsize;     /* response */
 638 };
 639
 640 struct nfsd4_layoutreturn {
 641         u32                     lr_return_type; /* request */
 642         u32                     lr_layout_type; /* request */
 643         struct nfsd4_layout_seg lr_seg;         /* request */
 644         u32                     lr_reclaim;     /* request */
 645         u32                     lrf_body_len;   /* request */
 646         void                    *lrf_body;      /* request */
 647         stateid_t               lr_sid;         /* request/response */
 648         bool                    lrs_present;    /* response */
 649 };
 650
 651 struct nfsd4_fallocate {
 652         /* request */
 653         stateid_t       falloc_stateid;
 654         loff_t          falloc_offset;
 655         u64             falloc_length;
 656 };
 657
 658 struct nfsd4_clone {
 659         /* request */
 660         stateid_t       cl_src_stateid;
 661         stateid_t       cl_dst_stateid;
 662         u64             cl_src_pos;
 663         u64             cl_dst_pos;
 664         u64             cl_count;
 665 };
 666
 667 struct nfsd42_write_res {
 668         u64                     wr_bytes_written;
 669         u32                     wr_stable_how;
 670         nfs4_verifier           wr_verifier;
 671         stateid_t               cb_stateid;
 672 };
 673
 674 struct nfsd4_cb_offload {
 675         struct nfsd4_callback   co_cb;
 676         struct nfsd42_write_res co_res;
 677         __be32                  co_nfserr;
 678         struct knfsd_fh         co_fh;
 679 };
 680
 681 struct nfsd4_copy {
 682         /* request */
 683         stateid_t               cp_src_stateid;
 684         stateid_t               cp_dst_stateid;
 685         u64                     cp_src_pos;
 686         u64                     cp_dst_pos;
 687         u64                     cp_count;
 688         struct nl4_server       *cp_src;
 689
 690         unsigned long           cp_flags;
 691 #define NFSD4_COPY_F_STOPPED            (0)
 692 #define NFSD4_COPY_F_INTRA              (1)
 693 #define NFSD4_COPY_F_SYNCHRONOUS        (2)
 694 #define NFSD4_COPY_F_COMMITTED          (3)
 695 #define NFSD4_COPY_F_COMPLETED          (4)
 696
 697         /* response */
 698         __be32                  nfserr;
 699         struct nfsd42_write_res cp_res;
 700         struct knfsd_fh         fh;
 701
 702         struct nfs4_client      *cp_clp;
 703
 704         struct nfsd_file        *nf_src;
 705         struct nfsd_file        *nf_dst;
 706
 707         copy_stateid_t          cp_stateid;
 708
 709         struct list_head        copies;
 710         struct task_struct      *copy_task;
 711         refcount_t              refcount;
 712
 713         struct nfsd4_ssc_umount_item *ss_nsui;
 714         struct nfs_fh           c_fh;
 715         nfs4_stateid            stateid;
 716         struct nfsd_net         *cp_nn;
 717 };
 718
 719 static inline void nfsd4_copy_set_sync(struct nfsd4_copy *copy, bool sync)
 720 {
 721         if (sync)
 722                 set_bit(NFSD4_COPY_F_SYNCHRONOUS, &copy->cp_flags);
 723         else
 724                 clear_bit(NFSD4_COPY_F_SYNCHRONOUS, &copy->cp_flags);
 725 }
 726
 727 static inline bool nfsd4_copy_is_sync(const struct nfsd4_copy *copy)
 728 {
 729         return test_bit(NFSD4_COPY_F_SYNCHRONOUS, &copy->cp_flags);
 730 }
 731
 732 static inline bool nfsd4_copy_is_async(const struct nfsd4_copy *copy)
 733 {
 734         return !test_bit(NFSD4_COPY_F_SYNCHRONOUS, &copy->cp_flags);
 735 }
 736
 737 static inline bool nfsd4_ssc_is_inter(const struct nfsd4_copy *copy)
 738 {
 739         return !test_bit(NFSD4_COPY_F_INTRA, &copy->cp_flags);
 740 }
 741
 742 struct nfsd4_seek {
 743         /* request */
 744         stateid_t       seek_stateid;
 745         loff_t          seek_offset;
 746         u32             seek_whence;
 747
 748         /* response */
 749         u32             seek_eof;
 750         loff_t          seek_pos;
 751 };
 752
 753 struct nfsd4_offload_status {
 754         /* request */
 755         stateid_t       stateid;
 756
 757         /* response */
 758         u64             count;
 759         __be32          status;
 760         bool            completed;
 761 };
 762
 763 struct nfsd4_copy_notify {
 764         /* request */
 765         stateid_t               cpn_src_stateid;
 766         struct nl4_server       *cpn_dst;
 767
 768         /* response */
 769         stateid_t               cpn_cnr_stateid;
 770         struct timespec64       cpn_lease_time;
 771         struct nl4_server       *cpn_src;
 772 };
 773
 774 struct nfsd4_op {
 775         u32                                     opnum;
 776         __be32                                  status;
 777         const struct nfsd4_operation            *opdesc;
 778         struct nfs4_replay                      *replay;
 779         union nfsd4_op_u {
 780                 struct nfsd4_access             access;
 781                 struct nfsd4_close              close;
 782                 struct nfsd4_commit             commit;
 783                 struct nfsd4_create             create;
 784                 struct nfsd4_delegreturn        delegreturn;
 785                 struct nfsd4_getattr            getattr;
 786                 struct svc_fh *                 getfh;
 787                 struct nfsd4_link               link;
 788                 struct nfsd4_lock               lock;
 789                 struct nfsd4_lockt              lockt;
 790                 struct nfsd4_locku              locku;
 791                 struct nfsd4_lookup             lookup;
 792                 struct nfsd4_verify             nverify;
 793                 struct nfsd4_open               open;
 794                 struct nfsd4_open_confirm       open_confirm;
 795                 struct nfsd4_open_downgrade     open_downgrade;
 796                 struct nfsd4_putfh              putfh;
 797                 struct nfsd4_read               read;
 798                 struct nfsd4_readdir            readdir;
 799                 struct nfsd4_readlink           readlink;
 800                 struct nfsd4_remove             remove;
 801                 struct nfsd4_rename             rename;
 802                 clientid_t                      renew;
 803                 struct nfsd4_secinfo            secinfo;
 804                 struct nfsd4_setattr            setattr;
 805                 struct nfsd4_setclientid        setclientid;
 806                 struct nfsd4_setclientid_confirm setclientid_confirm;
 807                 struct nfsd4_verify             verify;
 808                 struct nfsd4_write              write;
 809                 struct nfsd4_release_lockowner  release_lockowner;
 810
 811                 /* NFSv4.1 */
 812                 struct nfsd4_exchange_id        exchange_id;
 813                 struct nfsd4_backchannel_ctl    backchannel_ctl;
 814                 struct nfsd4_bind_conn_to_session bind_conn_to_session;
 815                 struct nfsd4_create_session     create_session;
 816                 struct nfsd4_destroy_session    destroy_session;
 817                 struct nfsd4_destroy_clientid   destroy_clientid;
 818                 struct nfsd4_sequence           sequence;
 819                 struct nfsd4_reclaim_complete   reclaim_complete;
 820                 struct nfsd4_test_stateid       test_stateid;
 821                 struct nfsd4_free_stateid       free_stateid;
 822                 struct nfsd4_get_dir_delegation get_dir_delegation;
 823                 struct nfsd4_getdeviceinfo      getdeviceinfo;
 824                 struct nfsd4_layoutget          layoutget;
 825                 struct nfsd4_layoutcommit       layoutcommit;
 826                 struct nfsd4_layoutreturn       layoutreturn;
 827                 struct nfsd4_secinfo_no_name    secinfo_no_name;
 828
 829                 /* NFSv4.2 */
 830                 struct nfsd4_fallocate          allocate;
 831                 struct nfsd4_fallocate          deallocate;
 832                 struct nfsd4_clone              clone;
 833                 struct nfsd4_copy               copy;
 834                 struct nfsd4_offload_status     offload_status;
 835                 struct nfsd4_copy_notify        copy_notify;
 836                 struct nfsd4_seek               seek;
 837
 838                 struct nfsd4_getxattr           getxattr;
 839                 struct nfsd4_setxattr           setxattr;
 840                 struct nfsd4_listxattrs         listxattrs;
 841                 struct nfsd4_removexattr        removexattr;
 842         } u;
 843 };
 844
 845 bool nfsd4_cache_this_op(struct nfsd4_op *);
 846
 847 /*
 848  * Memory needed just for the duration of processing one compound:
 849  */
 850 struct svcxdr_tmpbuf {
 851         struct svcxdr_tmpbuf *next;
 852         char buf[];
 853 };
 854
 855 struct nfsd4_compoundargs {
 856         /* scratch variables for XDR decode */
 857         struct xdr_stream               *xdr;
 858         struct svcxdr_tmpbuf            *to_free;
 859         struct svc_rqst                 *rqstp;
 860
 861         char *                          tag;
 862         u32                             taglen;
 863         u32                             minorversion;
 864         u32                             client_opcnt;
 865         u32                             opcnt;
 866         bool                            splice_ok;
 867         struct nfsd4_op                 *ops;
 868         struct nfsd4_op                 iops[8];
 869 };
 870
 871 struct nfsd4_compoundres {
 872         /* scratch variables for XDR encode */
 873         struct xdr_stream               *xdr;
 874         struct svc_rqst *               rqstp;
 875
 876         __be32                          *statusp;
 877         char *                          tag;
 878         u32                             taglen;
 879         u32                             opcnt;
 880
 881         struct nfsd4_compound_state     cstate;
 882 };
 883
 884 static inline bool nfsd4_is_solo_sequence(struct nfsd4_compoundres *resp)
 885 {
 886         struct nfsd4_compoundargs *args = resp->rqstp->rq_argp;
 887         return resp->opcnt == 1 && args->ops[0].opnum == OP_SEQUENCE;
 888 }
 889
 890 /*
 891  * The session reply cache only needs to cache replies that the client
 892  * actually asked us to.  But it's almost free for us to cache compounds
 893  * consisting of only a SEQUENCE op, so we may as well cache those too.
 894  * Also, the protocol doesn't give us a convenient response in the case
 895  * of a replay of a solo SEQUENCE op that wasn't cached
 896  * (RETRY_UNCACHED_REP can only be returned in the second op of a
 897  * compound).
 898  */
 899 static inline bool nfsd4_cache_this(struct nfsd4_compoundres *resp)
 900 {
 901         return (resp->cstate.slot->sl_flags & NFSD4_SLOT_CACHETHIS)
 902                 || nfsd4_is_solo_sequence(resp);
 903 }
 904
 905 static inline bool nfsd4_last_compound_op(struct svc_rqst *rqstp)
 906 {
 907         struct nfsd4_compoundres *resp = rqstp->rq_resp;
 908         struct nfsd4_compoundargs *argp = rqstp->rq_argp;
 909
 910         return argp->opcnt == resp->opcnt;
 911 }
 912
 913 const struct nfsd4_operation *OPDESC(struct nfsd4_op *op);
 914 int nfsd4_max_reply(struct svc_rqst *rqstp, struct nfsd4_op *op);
 915 void warn_on_nonidempotent_op(struct nfsd4_op *op);
 916
 917 #define NFS4_SVC_XDRSIZE                sizeof(struct nfsd4_compoundargs)
 918
 919 bool nfsd4_mach_creds_match(struct nfs4_client *cl, struct svc_rqst *rqstp);
 920 bool nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
 921 bool nfs4svc_encode_compoundres(struct svc_rqst *rqstp, struct xdr_stream *xdr);
 922 __be32 nfsd4_check_resp_size(struct nfsd4_compoundres *, u32);
 923 void nfsd4_encode_operation(struct nfsd4_compoundres *, struct nfsd4_op *);
 924 void nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op);
 925 __be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words,
 926                 struct svc_fh *fhp, struct svc_export *exp,
 927                 struct dentry *dentry,
 928                 u32 *bmval, struct svc_rqst *, int ignore_crossmnt);
 929 extern __be32 nfsd4_setclientid(struct svc_rqst *rqstp,
 930                 struct nfsd4_compound_state *, union nfsd4_op_u *u);
 931 extern __be32 nfsd4_setclientid_confirm(struct svc_rqst *rqstp,
 932                 struct nfsd4_compound_state *, union nfsd4_op_u *u);
 933 extern __be32 nfsd4_exchange_id(struct svc_rqst *rqstp,
 934                 struct nfsd4_compound_state *, union nfsd4_op_u *u);
 935 extern __be32 nfsd4_backchannel_ctl(struct svc_rqst *,
 936                 struct nfsd4_compound_state *, union nfsd4_op_u *u);
 937 extern __be32 nfsd4_bind_conn_to_session(struct svc_rqst *,
 938                 struct nfsd4_compound_state *, union nfsd4_op_u *u);
 939 extern __be32 nfsd4_create_session(struct svc_rqst *,
 940                 struct nfsd4_compound_state *, union nfsd4_op_u *u);
 941 extern __be32 nfsd4_sequence(struct svc_rqst *,
 942                 struct nfsd4_compound_state *, union nfsd4_op_u *u);
 943 extern void nfsd4_sequence_done(struct nfsd4_compoundres *resp);
 944 extern __be32 nfsd4_destroy_session(struct svc_rqst *,
 945                 struct nfsd4_compound_state *, union nfsd4_op_u *u);
 946 extern __be32 nfsd4_destroy_clientid(struct svc_rqst *, struct nfsd4_compound_state *,
 947                 union nfsd4_op_u *u);
 948 __be32 nfsd4_reclaim_complete(struct svc_rqst *, struct nfsd4_compound_state *,
 949                 union nfsd4_op_u *u);
 950 extern __be32 nfsd4_process_open1(struct nfsd4_compound_state *,
 951                 struct nfsd4_open *open, struct nfsd_net *nn);
 952 extern __be32 nfsd4_process_open2(struct svc_rqst *rqstp,
 953                 struct svc_fh *current_fh, struct nfsd4_open *open);
 954 extern void nfsd4_cstate_clear_replay(struct nfsd4_compound_state *cstate);
 955 extern void nfsd4_cleanup_open_state(struct nfsd4_compound_state *cstate,
 956                 struct nfsd4_open *open);
 957 extern __be32 nfsd4_open_confirm(struct svc_rqst *rqstp,
 958                 struct nfsd4_compound_state *, union nfsd4_op_u *u);
 959 extern __be32 nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *,
 960                 union nfsd4_op_u *u);
 961 extern __be32 nfsd4_open_downgrade(struct svc_rqst *rqstp,
 962                 struct nfsd4_compound_state *, union nfsd4_op_u *u);
 963 extern __be32 nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *,
 964                 union nfsd4_op_u *u);
 965 extern void nfsd4_lock_release(union nfsd4_op_u *u);
 966 extern __be32 nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *,
 967                 union nfsd4_op_u *u);
 968 extern void nfsd4_lockt_release(union nfsd4_op_u *u);
 969 extern __be32 nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *,
 970                 union nfsd4_op_u *u);
 971 extern __be32
 972 nfsd4_release_lockowner(struct svc_rqst *rqstp,
 973                 struct nfsd4_compound_state *, union nfsd4_op_u *u);
 974 extern void nfsd4_release_compoundargs(struct svc_rqst *rqstp);
 975 extern __be32 nfsd4_delegreturn(struct svc_rqst *rqstp,
 976                 struct nfsd4_compound_state *, union nfsd4_op_u *u);
 977 extern __be32 nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *,
 978                 union nfsd4_op_u *u);
 979 extern __be32 nfsd4_test_stateid(struct svc_rqst *rqstp,
 980                 struct nfsd4_compound_state *, union nfsd4_op_u *);
 981 extern __be32 nfsd4_free_stateid(struct svc_rqst *rqstp,
 982                 struct nfsd4_compound_state *, union nfsd4_op_u *);
 983 extern void nfsd4_bump_seqid(struct nfsd4_compound_state *, __be32 nfserr);
 984
 985 enum nfsd4_op_flags {
 986         ALLOWED_WITHOUT_FH = 1 << 0,    /* No current filehandle required */
 987         ALLOWED_ON_ABSENT_FS = 1 << 1,  /* ops processed on absent fs */
 988         ALLOWED_AS_FIRST_OP = 1 << 2,   /* ops reqired first in compound */
 989         /* For rfc 5661 section 2.6.3.1.1: */
 990         OP_HANDLES_WRONGSEC = 1 << 3,
 991         OP_IS_PUTFH_LIKE = 1 << 4,
 992         /*
 993          * These are the ops whose result size we estimate before
 994          * encoding, to avoid performing an op then not being able to
 995          * respond or cache a response.  This includes writes and setattrs
 996          * as well as the operations usually called "nonidempotent":
 997          */
 998         OP_MODIFIES_SOMETHING = 1 << 5,
 999         /*
1000          * Cache compounds containing these ops in the xid-based drc:
1001          * We use the DRC for compounds containing non-idempotent
1002          * operations, *except* those that are 4.1-specific (since
1003          * sessions provide their own EOS), and except for stateful
1004          * operations other than setclientid and setclientid_confirm
1005          * (since sequence numbers provide EOS for open, lock, etc in
1006          * the v4.0 case).
1007          */
1008         OP_CACHEME = 1 << 6,
1009         /*
1010          * These are ops which clear current state id.
1011          */
1012         OP_CLEAR_STATEID = 1 << 7,
1013         /* Most ops return only an error on failure; some may do more: */
1014         OP_NONTRIVIAL_ERROR_ENCODE = 1 << 8,
1015 };
1016
1017 struct nfsd4_operation {
1018         __be32 (*op_func)(struct svc_rqst *, struct nfsd4_compound_state *,
1019                         union nfsd4_op_u *);
1020         void (*op_release)(union nfsd4_op_u *);
1021         u32 op_flags;
1022         char *op_name;
1023         /* Try to get response size before operation */
1024         u32 (*op_rsize_bop)(const struct svc_rqst *rqstp,
1025                         const struct nfsd4_op *op);
1026         void (*op_get_currentstateid)(struct nfsd4_compound_state *,
1027                         union nfsd4_op_u *);
1028         void (*op_set_currentstateid)(struct nfsd4_compound_state *,
1029                         union nfsd4_op_u *);
1030 };
1031
1032 struct nfsd4_cb_recall_any {
1033         struct nfsd4_callback   ra_cb;
1034         u32                     ra_keep;
1035         u32                     ra_bmval[1];
1036 };
1037
1038 #endif