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TOMOYO Linux Cross Reference
Linux/fs/nfsd/xdr4.h

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  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_STATE_ID(c, f) ((c)->sid_flags |= (f))
 50 #define HAS_STATE_ID(c, f) ((c)->sid_flags & (f))
 51 #define CLEAR_STATE_ID(c, f) ((c)->sid_flags &= ~(f))
 52 
 53 struct nfsd4_compound_state {
 54         struct svc_fh           current_fh;
 55         struct svc_fh           save_fh;
 56         struct nfs4_stateowner  *replay_owner;
 57         struct nfs4_client      *clp;
 58         /* For sessions DRC */
 59         struct nfsd4_session    *session;
 60         struct nfsd4_slot       *slot;
 61         int                     data_offset;
 62         bool                    spo_must_allowed;
 63         size_t                  iovlen;
 64         u32                     minorversion;
 65         __be32                  status;
 66         stateid_t       current_stateid;
 67         stateid_t       save_stateid;
 68         /* to indicate current and saved state id presents */
 69         u32             sid_flags;
 70 };
 71 
 72 static inline bool nfsd4_has_session(struct nfsd4_compound_state *cs)
 73 {
 74         return cs->slot != NULL;
 75 }
 76 
 77 struct nfsd4_change_info {
 78         u32             atomic;
 79         bool            change_supported;
 80         u32             before_ctime_sec;
 81         u32             before_ctime_nsec;
 82         u64             before_change;
 83         u32             after_ctime_sec;
 84         u32             after_ctime_nsec;
 85         u64             after_change;
 86 };
 87 
 88 struct nfsd4_access {
 89         u32             ac_req_access;      /* request */
 90         u32             ac_supported;       /* response */
 91         u32             ac_resp_access;     /* response */
 92 };
 93 
 94 struct nfsd4_close {
 95         u32             cl_seqid;           /* request */
 96         stateid_t       cl_stateid;         /* request+response */
 97 };
 98 
 99 struct nfsd4_commit {
100         u64             co_offset;          /* request */
101         u32             co_count;           /* request */
102         nfs4_verifier   co_verf;            /* response */
103 };
104 
105 struct nfsd4_create {
106         u32             cr_namelen;         /* request */
107         char *          cr_name;            /* request */
108         u32             cr_type;            /* request */
109         union {                             /* request */
110                 struct {
111                         u32 datalen;
112                         char *data;
113                 } link;   /* NF4LNK */
114                 struct {
115                         u32 specdata1;
116                         u32 specdata2;
117                 } dev;    /* NF4BLK, NF4CHR */
118         } u;
119         u32             cr_bmval[3];        /* request */
120         struct iattr    cr_iattr;           /* request */
121         int             cr_umask;           /* request */
122         struct nfsd4_change_info  cr_cinfo; /* response */
123         struct nfs4_acl *cr_acl;
124         struct xdr_netobj cr_label;
125 };
126 #define cr_datalen      u.link.datalen
127 #define cr_data         u.link.data
128 #define cr_specdata1    u.dev.specdata1
129 #define cr_specdata2    u.dev.specdata2
130 
131 struct nfsd4_delegreturn {
132         stateid_t       dr_stateid;
133 };
134 
135 struct nfsd4_getattr {
136         u32             ga_bmval[3];        /* request */
137         struct svc_fh   *ga_fhp;            /* response */
138 };
139 
140 struct nfsd4_link {
141         u32             li_namelen;         /* request */
142         char *          li_name;            /* request */
143         struct nfsd4_change_info  li_cinfo; /* response */
144 };
145 
146 struct nfsd4_lock_denied {
147         clientid_t      ld_clientid;
148         struct xdr_netobj       ld_owner;
149         u64             ld_start;
150         u64             ld_length;
151         u32             ld_type;
152 };
153 
154 struct nfsd4_lock {
155         /* request */
156         u32             lk_type;
157         u32             lk_reclaim;         /* boolean */
158         u64             lk_offset;
159         u64             lk_length;
160         u32             lk_is_new;
161         union {
162                 struct {
163                         u32             open_seqid;
164                         stateid_t       open_stateid;
165                         u32             lock_seqid;
166                         clientid_t      clientid;
167                         struct xdr_netobj owner;
168                 } new;
169                 struct {
170                         stateid_t       lock_stateid;
171                         u32             lock_seqid;
172                 } old;
173         } v;
174 
175         /* response */
176         union {
177                 struct {
178                         stateid_t               stateid;
179                 } ok;
180                 struct nfsd4_lock_denied        denied;
181         } u;
182 };
183 #define lk_new_open_seqid       v.new.open_seqid
184 #define lk_new_open_stateid     v.new.open_stateid
185 #define lk_new_lock_seqid       v.new.lock_seqid
186 #define lk_new_clientid         v.new.clientid
187 #define lk_new_owner            v.new.owner
188 #define lk_old_lock_stateid     v.old.lock_stateid
189 #define lk_old_lock_seqid       v.old.lock_seqid
190 
191 #define lk_resp_stateid u.ok.stateid
192 #define lk_denied       u.denied
193 
194 
195 struct nfsd4_lockt {
196         u32                             lt_type;
197         clientid_t                      lt_clientid;
198         struct xdr_netobj               lt_owner;
199         u64                             lt_offset;
200         u64                             lt_length;
201         struct nfsd4_lock_denied        lt_denied;
202 };
203 
204  
205 struct nfsd4_locku {
206         u32             lu_type;
207         u32             lu_seqid;
208         stateid_t       lu_stateid;
209         u64             lu_offset;
210         u64             lu_length;
211 };
212 
213 
214 struct nfsd4_lookup {
215         u32             lo_len;             /* request */
216         char *          lo_name;            /* request */
217 };
218 
219 struct nfsd4_putfh {
220         u32             pf_fhlen;           /* request */
221         char            *pf_fhval;          /* request */
222 };
223 
224 struct nfsd4_open {
225         u32             op_claim_type;      /* request */
226         struct xdr_netobj op_fname;         /* request - everything but CLAIM_PREV */
227         u32             op_delegate_type;   /* request - CLAIM_PREV only */
228         stateid_t       op_delegate_stateid; /* request - response */
229         u32             op_why_no_deleg;    /* response - DELEG_NONE_EXT only */
230         u32             op_create;          /* request */
231         u32             op_createmode;      /* request */
232         int             op_umask;           /* request */
233         u32             op_bmval[3];        /* request */
234         struct iattr    op_iattr;           /* UNCHECKED4, GUARDED4, EXCLUSIVE4_1 */
235         nfs4_verifier   op_verf __attribute__((aligned(32)));
236                                             /* EXCLUSIVE4 */
237         clientid_t      op_clientid;        /* request */
238         struct xdr_netobj op_owner;           /* request */
239         u32             op_seqid;           /* request */
240         u32             op_share_access;    /* request */
241         u32             op_share_deny;      /* request */
242         u32             op_deleg_want;      /* request */
243         stateid_t       op_stateid;         /* response */
244         __be32          op_xdr_error;       /* see nfsd4_open_omfg() */
245         u32             op_recall;          /* recall */
246         struct nfsd4_change_info  op_cinfo; /* response */
247         u32             op_rflags;          /* response */
248         bool            op_truncate;        /* used during processing */
249         bool            op_created;         /* used during processing */
250         struct nfs4_openowner *op_openowner; /* used during processing */
251         struct nfs4_file *op_file;          /* used during processing */
252         struct nfs4_ol_stateid *op_stp;     /* used during processing */
253         struct nfs4_clnt_odstate *op_odstate; /* used during processing */
254         struct nfs4_acl *op_acl;
255         struct xdr_netobj op_label;
256 };
257 
258 struct nfsd4_open_confirm {
259         stateid_t       oc_req_stateid          /* request */;
260         u32             oc_seqid                /* request */;
261         stateid_t       oc_resp_stateid         /* response */;
262 };
263 
264 struct nfsd4_open_downgrade {
265         stateid_t       od_stateid;
266         u32             od_seqid;
267         u32             od_share_access;        /* request */
268         u32             od_deleg_want;          /* request */
269         u32             od_share_deny;          /* request */
270 };
271 
272 
273 struct nfsd4_read {
274         stateid_t       rd_stateid;         /* request */
275         u64             rd_offset;          /* request */
276         u32             rd_length;          /* request */
277         int             rd_vlen;
278         struct file     *rd_filp;
279         bool            rd_tmp_file;
280         
281         struct svc_rqst *rd_rqstp;          /* response */
282         struct svc_fh * rd_fhp;             /* response */
283 };
284 
285 struct nfsd4_readdir {
286         u64             rd_cookie;          /* request */
287         nfs4_verifier   rd_verf;            /* request */
288         u32             rd_dircount;        /* request */
289         u32             rd_maxcount;        /* request */
290         u32             rd_bmval[3];        /* request */
291         struct svc_rqst *rd_rqstp;          /* response */
292         struct svc_fh * rd_fhp;             /* response */
293 
294         struct readdir_cd       common;
295         struct xdr_stream       *xdr;
296         int                     cookie_offset;
297 };
298 
299 struct nfsd4_release_lockowner {
300         clientid_t        rl_clientid;
301         struct xdr_netobj rl_owner;
302 };
303 struct nfsd4_readlink {
304         struct svc_rqst *rl_rqstp;          /* request */
305         struct svc_fh * rl_fhp;             /* request */
306 };
307 
308 struct nfsd4_remove {
309         u32             rm_namelen;         /* request */
310         char *          rm_name;            /* request */
311         struct nfsd4_change_info  rm_cinfo; /* response */
312 };
313 
314 struct nfsd4_rename {
315         u32             rn_snamelen;        /* request */
316         char *          rn_sname;           /* request */
317         u32             rn_tnamelen;        /* request */
318         char *          rn_tname;           /* request */
319         struct nfsd4_change_info  rn_sinfo; /* response */
320         struct nfsd4_change_info  rn_tinfo; /* response */
321 };
322 
323 struct nfsd4_secinfo {
324         u32 si_namelen;                                 /* request */
325         char *si_name;                                  /* request */
326         struct svc_export *si_exp;                      /* response */
327 };
328 
329 struct nfsd4_secinfo_no_name {
330         u32 sin_style;                                  /* request */
331         struct svc_export *sin_exp;                     /* response */
332 };
333 
334 struct nfsd4_setattr {
335         stateid_t       sa_stateid;         /* request */
336         u32             sa_bmval[3];        /* request */
337         struct iattr    sa_iattr;           /* request */
338         struct nfs4_acl *sa_acl;
339         struct xdr_netobj sa_label;
340 };
341 
342 struct nfsd4_setclientid {
343         nfs4_verifier   se_verf;            /* request */
344         struct xdr_netobj se_name;
345         u32             se_callback_prog;   /* request */
346         u32             se_callback_netid_len;  /* request */
347         char *          se_callback_netid_val;  /* request */
348         u32             se_callback_addr_len;   /* request */
349         char *          se_callback_addr_val;   /* request */
350         u32             se_callback_ident;  /* request */
351         clientid_t      se_clientid;        /* response */
352         nfs4_verifier   se_confirm;         /* response */
353 };
354 
355 struct nfsd4_setclientid_confirm {
356         clientid_t      sc_clientid;
357         nfs4_verifier   sc_confirm;
358 };
359 
360 struct nfsd4_saved_compoundargs {
361         __be32 *p;
362         __be32 *end;
363         int pagelen;
364         struct page **pagelist;
365 };
366 
367 struct nfsd4_test_stateid_id {
368         __be32                  ts_id_status;
369         stateid_t               ts_id_stateid;
370         struct list_head        ts_id_list;
371 };
372 
373 struct nfsd4_test_stateid {
374         u32             ts_num_ids;
375         struct list_head ts_stateid_list;
376 };
377 
378 struct nfsd4_free_stateid {
379         stateid_t       fr_stateid;         /* request */
380 };
381 
382 /* also used for NVERIFY */
383 struct nfsd4_verify {
384         u32             ve_bmval[3];        /* request */
385         u32             ve_attrlen;         /* request */
386         char *          ve_attrval;         /* request */
387 };
388 
389 struct nfsd4_write {
390         stateid_t       wr_stateid;         /* request */
391         u64             wr_offset;          /* request */
392         u32             wr_stable_how;      /* request */
393         u32             wr_buflen;          /* request */
394         struct kvec     wr_head;
395         struct page **  wr_pagelist;        /* request */
396 
397         u32             wr_bytes_written;   /* response */
398         u32             wr_how_written;     /* response */
399         nfs4_verifier   wr_verifier;        /* response */
400 };
401 
402 struct nfsd4_exchange_id {
403         nfs4_verifier   verifier;
404         struct xdr_netobj clname;
405         u32             flags;
406         clientid_t      clientid;
407         u32             seqid;
408         int             spa_how;
409         u32             spo_must_enforce[3];
410         u32             spo_must_allow[3];
411 };
412 
413 struct nfsd4_sequence {
414         struct nfs4_sessionid   sessionid;              /* request/response */
415         u32                     seqid;                  /* request/response */
416         u32                     slotid;                 /* request/response */
417         u32                     maxslots;               /* request/response */
418         u32                     cachethis;              /* request */
419 #if 0
420         u32                     target_maxslots;        /* response */
421 #endif /* not yet */
422         u32                     status_flags;           /* response */
423 };
424 
425 struct nfsd4_destroy_session {
426         struct nfs4_sessionid   sessionid;
427 };
428 
429 struct nfsd4_destroy_clientid {
430         clientid_t clientid;
431 };
432 
433 struct nfsd4_reclaim_complete {
434         u32 rca_one_fs;
435 };
436 
437 struct nfsd4_deviceid {
438         u64                     fsid_idx;
439         u32                     generation;
440         u32                     pad;
441 };
442 
443 struct nfsd4_layout_seg {
444         u32                     iomode;
445         u64                     offset;
446         u64                     length;
447 };
448 
449 struct nfsd4_getdeviceinfo {
450         struct nfsd4_deviceid   gd_devid;       /* request */
451         u32                     gd_layout_type; /* request */
452         u32                     gd_maxcount;    /* request */
453         u32                     gd_notify_types;/* request - response */
454         void                    *gd_device;     /* response */
455 };
456 
457 struct nfsd4_layoutget {
458         u64                     lg_minlength;   /* request */
459         u32                     lg_signal;      /* request */
460         u32                     lg_layout_type; /* request */
461         u32                     lg_maxcount;    /* request */
462         stateid_t               lg_sid;         /* request/response */
463         struct nfsd4_layout_seg lg_seg;         /* request/response */
464         void                    *lg_content;    /* response */
465 };
466 
467 struct nfsd4_layoutcommit {
468         stateid_t               lc_sid;         /* request */
469         struct nfsd4_layout_seg lc_seg;         /* request */
470         u32                     lc_reclaim;     /* request */
471         u32                     lc_newoffset;   /* request */
472         u64                     lc_last_wr;     /* request */
473         struct timespec         lc_mtime;       /* request */
474         u32                     lc_layout_type; /* request */
475         u32                     lc_up_len;      /* layout length */
476         void                    *lc_up_layout;  /* decoded by callback */
477         u32                     lc_size_chg;    /* boolean for response */
478         u64                     lc_newsize;     /* response */
479 };
480 
481 struct nfsd4_layoutreturn {
482         u32                     lr_return_type; /* request */
483         u32                     lr_layout_type; /* request */
484         struct nfsd4_layout_seg lr_seg;         /* request */
485         u32                     lr_reclaim;     /* request */
486         u32                     lrf_body_len;   /* request */
487         void                    *lrf_body;      /* request */
488         stateid_t               lr_sid;         /* request/response */
489         u32                     lrs_present;    /* response */
490 };
491 
492 struct nfsd4_fallocate {
493         /* request */
494         stateid_t       falloc_stateid;
495         loff_t          falloc_offset;
496         u64             falloc_length;
497 };
498 
499 struct nfsd4_clone {
500         /* request */
501         stateid_t       cl_src_stateid;
502         stateid_t       cl_dst_stateid;
503         u64             cl_src_pos;
504         u64             cl_dst_pos;
505         u64             cl_count;
506 };
507 
508 struct nfsd42_write_res {
509         u64                     wr_bytes_written;
510         u32                     wr_stable_how;
511         nfs4_verifier           wr_verifier;
512 };
513 
514 struct nfsd4_copy {
515         /* request */
516         stateid_t       cp_src_stateid;
517         stateid_t       cp_dst_stateid;
518         u64             cp_src_pos;
519         u64             cp_dst_pos;
520         u64             cp_count;
521 
522         /* both */
523         bool            cp_consecutive;
524         bool            cp_synchronous;
525 
526         /* response */
527         struct nfsd42_write_res cp_res;
528 };
529 
530 struct nfsd4_seek {
531         /* request */
532         stateid_t       seek_stateid;
533         loff_t          seek_offset;
534         u32             seek_whence;
535 
536         /* response */
537         u32             seek_eof;
538         loff_t          seek_pos;
539 };
540 
541 struct nfsd4_op {
542         int                                     opnum;
543         const struct nfsd4_operation *          opdesc;
544         __be32                                  status;
545         union nfsd4_op_u {
546                 struct nfsd4_access             access;
547                 struct nfsd4_close              close;
548                 struct nfsd4_commit             commit;
549                 struct nfsd4_create             create;
550                 struct nfsd4_delegreturn        delegreturn;
551                 struct nfsd4_getattr            getattr;
552                 struct svc_fh *                 getfh;
553                 struct nfsd4_link               link;
554                 struct nfsd4_lock               lock;
555                 struct nfsd4_lockt              lockt;
556                 struct nfsd4_locku              locku;
557                 struct nfsd4_lookup             lookup;
558                 struct nfsd4_verify             nverify;
559                 struct nfsd4_open               open;
560                 struct nfsd4_open_confirm       open_confirm;
561                 struct nfsd4_open_downgrade     open_downgrade;
562                 struct nfsd4_putfh              putfh;
563                 struct nfsd4_read               read;
564                 struct nfsd4_readdir            readdir;
565                 struct nfsd4_readlink           readlink;
566                 struct nfsd4_remove             remove;
567                 struct nfsd4_rename             rename;
568                 clientid_t                      renew;
569                 struct nfsd4_secinfo            secinfo;
570                 struct nfsd4_setattr            setattr;
571                 struct nfsd4_setclientid        setclientid;
572                 struct nfsd4_setclientid_confirm setclientid_confirm;
573                 struct nfsd4_verify             verify;
574                 struct nfsd4_write              write;
575                 struct nfsd4_release_lockowner  release_lockowner;
576 
577                 /* NFSv4.1 */
578                 struct nfsd4_exchange_id        exchange_id;
579                 struct nfsd4_backchannel_ctl    backchannel_ctl;
580                 struct nfsd4_bind_conn_to_session bind_conn_to_session;
581                 struct nfsd4_create_session     create_session;
582                 struct nfsd4_destroy_session    destroy_session;
583                 struct nfsd4_destroy_clientid   destroy_clientid;
584                 struct nfsd4_sequence           sequence;
585                 struct nfsd4_reclaim_complete   reclaim_complete;
586                 struct nfsd4_test_stateid       test_stateid;
587                 struct nfsd4_free_stateid       free_stateid;
588                 struct nfsd4_getdeviceinfo      getdeviceinfo;
589                 struct nfsd4_layoutget          layoutget;
590                 struct nfsd4_layoutcommit       layoutcommit;
591                 struct nfsd4_layoutreturn       layoutreturn;
592                 struct nfsd4_secinfo_no_name    secinfo_no_name;
593 
594                 /* NFSv4.2 */
595                 struct nfsd4_fallocate          allocate;
596                 struct nfsd4_fallocate          deallocate;
597                 struct nfsd4_clone              clone;
598                 struct nfsd4_copy               copy;
599                 struct nfsd4_seek               seek;
600         } u;
601         struct nfs4_replay *                    replay;
602 };
603 
604 bool nfsd4_cache_this_op(struct nfsd4_op *);
605 
606 /*
607  * Memory needed just for the duration of processing one compound:
608  */
609 struct svcxdr_tmpbuf {
610         struct svcxdr_tmpbuf *next;
611         char buf[];
612 };
613 
614 struct nfsd4_compoundargs {
615         /* scratch variables for XDR decode */
616         __be32 *                        p;
617         __be32 *                        end;
618         struct page **                  pagelist;
619         int                             pagelen;
620         bool                            tail;
621         __be32                          tmp[8];
622         __be32 *                        tmpp;
623         struct svcxdr_tmpbuf            *to_free;
624 
625         struct svc_rqst                 *rqstp;
626 
627         u32                             taglen;
628         char *                          tag;
629         u32                             minorversion;
630         u32                             opcnt;
631         struct nfsd4_op                 *ops;
632         struct nfsd4_op                 iops[8];
633         int                             cachetype;
634 };
635 
636 struct nfsd4_compoundres {
637         /* scratch variables for XDR encode */
638         struct xdr_stream               xdr;
639         struct svc_rqst *               rqstp;
640 
641         u32                             taglen;
642         char *                          tag;
643         u32                             opcnt;
644         __be32 *                        tagp; /* tag, opcount encode location */
645         struct nfsd4_compound_state     cstate;
646 };
647 
648 static inline bool nfsd4_is_solo_sequence(struct nfsd4_compoundres *resp)
649 {
650         struct nfsd4_compoundargs *args = resp->rqstp->rq_argp;
651         return resp->opcnt == 1 && args->ops[0].opnum == OP_SEQUENCE;
652 }
653 
654 /*
655  * The session reply cache only needs to cache replies that the client
656  * actually asked us to.  But it's almost free for us to cache compounds
657  * consisting of only a SEQUENCE op, so we may as well cache those too.
658  * Also, the protocol doesn't give us a convenient response in the case
659  * of a replay of a solo SEQUENCE op that wasn't cached
660  * (RETRY_UNCACHED_REP can only be returned in the second op of a
661  * compound).
662  */
663 static inline bool nfsd4_cache_this(struct nfsd4_compoundres *resp)
664 {
665         return (resp->cstate.slot->sl_flags & NFSD4_SLOT_CACHETHIS)
666                 || nfsd4_is_solo_sequence(resp);
667 }
668 
669 static inline bool nfsd4_last_compound_op(struct svc_rqst *rqstp)
670 {
671         struct nfsd4_compoundres *resp = rqstp->rq_resp;
672         struct nfsd4_compoundargs *argp = rqstp->rq_argp;
673 
674         return argp->opcnt == resp->opcnt;
675 }
676 
677 const struct nfsd4_operation *OPDESC(struct nfsd4_op *op);
678 int nfsd4_max_reply(struct svc_rqst *rqstp, struct nfsd4_op *op);
679 void warn_on_nonidempotent_op(struct nfsd4_op *op);
680 
681 #define NFS4_SVC_XDRSIZE                sizeof(struct nfsd4_compoundargs)
682 
683 static inline void
684 set_change_info(struct nfsd4_change_info *cinfo, struct svc_fh *fhp)
685 {
686         BUG_ON(!fhp->fh_pre_saved);
687         cinfo->atomic = (u32)fhp->fh_post_saved;
688         cinfo->change_supported = IS_I_VERSION(d_inode(fhp->fh_dentry));
689 
690         cinfo->before_change = fhp->fh_pre_change;
691         cinfo->after_change = fhp->fh_post_change;
692         cinfo->before_ctime_sec = fhp->fh_pre_ctime.tv_sec;
693         cinfo->before_ctime_nsec = fhp->fh_pre_ctime.tv_nsec;
694         cinfo->after_ctime_sec = fhp->fh_post_attr.ctime.tv_sec;
695         cinfo->after_ctime_nsec = fhp->fh_post_attr.ctime.tv_nsec;
696 
697 }
698 
699 
700 bool nfsd4_mach_creds_match(struct nfs4_client *cl, struct svc_rqst *rqstp);
701 int nfs4svc_encode_voidres(struct svc_rqst *, __be32 *);
702 int nfs4svc_decode_compoundargs(struct svc_rqst *, __be32 *);
703 int nfs4svc_encode_compoundres(struct svc_rqst *, __be32 *);
704 __be32 nfsd4_check_resp_size(struct nfsd4_compoundres *, u32);
705 void nfsd4_encode_operation(struct nfsd4_compoundres *, struct nfsd4_op *);
706 void nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op);
707 __be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words,
708                 struct svc_fh *fhp, struct svc_export *exp,
709                 struct dentry *dentry,
710                 u32 *bmval, struct svc_rqst *, int ignore_crossmnt);
711 extern __be32 nfsd4_setclientid(struct svc_rqst *rqstp,
712                 struct nfsd4_compound_state *, union nfsd4_op_u *u);
713 extern __be32 nfsd4_setclientid_confirm(struct svc_rqst *rqstp,
714                 struct nfsd4_compound_state *, union nfsd4_op_u *u);
715 extern __be32 nfsd4_exchange_id(struct svc_rqst *rqstp,
716                 struct nfsd4_compound_state *, union nfsd4_op_u *u);
717 extern __be32 nfsd4_backchannel_ctl(struct svc_rqst *,
718                 struct nfsd4_compound_state *, union nfsd4_op_u *u);
719 extern __be32 nfsd4_bind_conn_to_session(struct svc_rqst *,
720                 struct nfsd4_compound_state *, union nfsd4_op_u *u);
721 extern __be32 nfsd4_create_session(struct svc_rqst *,
722                 struct nfsd4_compound_state *, union nfsd4_op_u *u);
723 extern __be32 nfsd4_sequence(struct svc_rqst *,
724                 struct nfsd4_compound_state *, union nfsd4_op_u *u);
725 extern void nfsd4_sequence_done(struct nfsd4_compoundres *resp);
726 extern __be32 nfsd4_destroy_session(struct svc_rqst *,
727                 struct nfsd4_compound_state *, union nfsd4_op_u *u);
728 extern __be32 nfsd4_destroy_clientid(struct svc_rqst *, struct nfsd4_compound_state *,
729                 union nfsd4_op_u *u);
730 __be32 nfsd4_reclaim_complete(struct svc_rqst *, struct nfsd4_compound_state *,
731                 union nfsd4_op_u *u);
732 extern __be32 nfsd4_process_open1(struct nfsd4_compound_state *,
733                 struct nfsd4_open *open, struct nfsd_net *nn);
734 extern __be32 nfsd4_process_open2(struct svc_rqst *rqstp,
735                 struct svc_fh *current_fh, struct nfsd4_open *open);
736 extern void nfsd4_cstate_clear_replay(struct nfsd4_compound_state *cstate);
737 extern void nfsd4_cleanup_open_state(struct nfsd4_compound_state *cstate,
738                 struct nfsd4_open *open);
739 extern __be32 nfsd4_open_confirm(struct svc_rqst *rqstp,
740                 struct nfsd4_compound_state *, union nfsd4_op_u *u);
741 extern __be32 nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *,
742                 union nfsd4_op_u *u);
743 extern __be32 nfsd4_open_downgrade(struct svc_rqst *rqstp,
744                 struct nfsd4_compound_state *, union nfsd4_op_u *u);
745 extern __be32 nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *,
746                 union nfsd4_op_u *u);
747 extern __be32 nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *,
748                 union nfsd4_op_u *u);
749 extern __be32 nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *,
750                 union nfsd4_op_u *u);
751 extern __be32
752 nfsd4_release_lockowner(struct svc_rqst *rqstp,
753                 struct nfsd4_compound_state *, union nfsd4_op_u *u);
754 extern void nfsd4_release_compoundargs(struct svc_rqst *rqstp);
755 extern __be32 nfsd4_delegreturn(struct svc_rqst *rqstp,
756                 struct nfsd4_compound_state *, union nfsd4_op_u *u);
757 extern __be32 nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *,
758                 union nfsd4_op_u *u);
759 extern __be32 nfsd4_test_stateid(struct svc_rqst *rqstp,
760                 struct nfsd4_compound_state *, union nfsd4_op_u *);
761 extern __be32 nfsd4_free_stateid(struct svc_rqst *rqstp,
762                 struct nfsd4_compound_state *, union nfsd4_op_u *);
763 extern void nfsd4_bump_seqid(struct nfsd4_compound_state *, __be32 nfserr);
764 
765 enum nfsd4_op_flags {
766         ALLOWED_WITHOUT_FH = 1 << 0,    /* No current filehandle required */
767         ALLOWED_ON_ABSENT_FS = 1 << 1,  /* ops processed on absent fs */
768         ALLOWED_AS_FIRST_OP = 1 << 2,   /* ops reqired first in compound */
769         /* For rfc 5661 section 2.6.3.1.1: */
770         OP_HANDLES_WRONGSEC = 1 << 3,
771         OP_IS_PUTFH_LIKE = 1 << 4,
772         /*
773          * These are the ops whose result size we estimate before
774          * encoding, to avoid performing an op then not being able to
775          * respond or cache a response.  This includes writes and setattrs
776          * as well as the operations usually called "nonidempotent":
777          */
778         OP_MODIFIES_SOMETHING = 1 << 5,
779         /*
780          * Cache compounds containing these ops in the xid-based drc:
781          * We use the DRC for compounds containing non-idempotent
782          * operations, *except* those that are 4.1-specific (since
783          * sessions provide their own EOS), and except for stateful
784          * operations other than setclientid and setclientid_confirm
785          * (since sequence numbers provide EOS for open, lock, etc in
786          * the v4.0 case).
787          */
788         OP_CACHEME = 1 << 6,
789         /*
790          * These are ops which clear current state id.
791          */
792         OP_CLEAR_STATEID = 1 << 7,
793         /* Most ops return only an error on failure; some may do more: */
794         OP_NONTRIVIAL_ERROR_ENCODE = 1 << 8,
795 };
796 
797 struct nfsd4_operation {
798         __be32 (*op_func)(struct svc_rqst *, struct nfsd4_compound_state *,
799                         union nfsd4_op_u *);
800         void (*op_release)(union nfsd4_op_u *);
801         u32 op_flags;
802         char *op_name;
803         /* Try to get response size before operation */
804         u32 (*op_rsize_bop)(struct svc_rqst *, struct nfsd4_op *);
805         void (*op_get_currentstateid)(struct nfsd4_compound_state *,
806                         union nfsd4_op_u *);
807         void (*op_set_currentstateid)(struct nfsd4_compound_state *,
808                         union nfsd4_op_u *);
809 };
810 
811 
812 #endif
813 
814 /*
815  * Local variables:
816  *  c-basic-offset: 8
817  * End:
818  */
819 

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