sys/vfs/nfs/nfsm_subs.h

   1 /*
   2  * Copyright (c) 1989, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * This code is derived from software contributed to Berkeley by
   6  * Rick Macklem at The University of Guelph.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. Neither the name of the University nor the names of its contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  *
  32  *      @(#)nfsm_subs.h 8.2 (Berkeley) 3/30/95
  33  * $FreeBSD: src/sys/nfs/nfsm_subs.h,v 1.27.2.1 2000/10/28 16:27:27 dwmalone Exp $
  34  * $DragonFly: src/sys/vfs/nfs/nfsm_subs.h,v 1.10 2008/09/17 21:44:25 dillon Exp $
  35  */
  36
  37
  38 #ifndef _NFS_NFSM_SUBS_H_
  39 #define _NFS_NFSM_SUBS_H_
  40
  41 struct ucred;
  42 struct vnode;
  43
  44 enum nfsm_state {
  45         NFSM_STATE_SETUP,
  46         NFSM_STATE_AUTH,
  47         NFSM_STATE_TRY,
  48         NFSM_STATE_WAITREPLY,
  49         NFSM_STATE_PROCESSREPLY,
  50         NFSM_STATE_DONE
  51 };
  52
  53 typedef enum nfsm_state nfsm_state_t;
  54
  55
  56 struct nfsm_info {
  57         /*
  58          * These fields are used by various nfsm_* functions during
  59          * the construction or deconstruction of a RPC.
  60          */
  61         struct mbuf     *mb;
  62         struct mbuf     *md;
  63         struct mbuf     *mrep;
  64         struct mbuf     *mreq;
  65         caddr_t         bpos;
  66         caddr_t         dpos;
  67         int             v3;
  68
  69         /*
  70          * These fields are used by the request processing state
  71          * machine.  mreq, md, dpos, and mrep above are also used.
  72          */
  73         nfsm_state_t    state;
  74         u_int32_t       procnum;
  75         struct vnode    *vp;
  76         struct thread   *td;
  77         struct ucred    *cred;
  78         struct nfsreq   *req;
  79         struct nfsmount *nmp;
  80         int             unused01;
  81         int             error;
  82
  83         /*
  84          * Retained state for higher level VOP and BIO operations
  85          */
  86         struct bio      *bio;
  87         void            (*done)(struct nfsm_info *);
  88         union {
  89                 struct {
  90                         int     must_commit;
  91                 } writerpc;
  92         } u;
  93 };
  94
  95 #define info_writerpc   u.writerpc
  96
  97 typedef struct nfsm_info *nfsm_info_t;
  98
  99 #define NULLOUT(nfsmexp)                                \
 100         do { if ((nfsmexp) == NULL) {                   \
 101                 error = EBADRPC; goto nfsmout; }        \
 102         } while(0)
 103
 104 #define NEGATIVEOUT(nfsmexp)                            \
 105         do { if ((nfsmexp) < 0) {                       \
 106                 error = EBADRPC; goto nfsmout; }        \
 107         } while(0)
 108
 109 #define NEGKEEPOUT(nfsmexp)                             \
 110         do { if ((nfsmexp) < 0) {                       \
 111                 goto nfsmout; }                         \
 112         } while(0)
 113
 114 #define NEGREPLYOUT(nfsmexp)                            \
 115         do {                                            \
 116                 int rv = (nfsmexp);                     \
 117                 if (rv < 0) {                           \
 118                         if (rv == -2)                   \
 119                                 nfsm_reply(&info, nfsd, slp, 0, &error); \
 120                         goto nfsmout;                   \
 121                 }                                       \
 122         } while(0)
 123
 124 #define ERROROUT(nfsmexp)       if ((error = (nfsmexp)) != 0) goto nfsmout
 125
 126 /*
 127  * These macros do strange and peculiar things to mbuf chains for
 128  * the assistance of the nfs code. To attempt to use them for any
 129  * other purpose will be dangerous. (they make weird assumptions)
 130  */
 131
 132 /*
 133  * First define what the actual subs. return
 134  */
 135 void    nfsm_reqhead(nfsm_info_t info, struct vnode *vp,
 136                                 u_long procid, int hsiz);
 137 struct mbuf *nfsm_rpchead (struct ucred *cr, int nmflag, int procid,
 138                                 int auth_type, int auth_len, char *auth_str,
 139                                 int verf_len, char *verf_str,
 140                                 struct mbuf *mrest, int mrest_len,
 141                                 struct mbuf **mbp, u_int32_t *xidp);
 142 void    *nfsm_build(nfsm_info_t info, int bytes);
 143 void    *nfsm_dissect(nfsm_info_t info, int bytes);
 144 int     nfsm_fhtom(nfsm_info_t info, struct vnode *vp);
 145 void    nfsm_srvfhtom(nfsm_info_t info, fhandle_t *fhp);
 146 void    nfsm_srvpostop_fh(nfsm_info_t info, fhandle_t *fhp);
 147 int nfsm_mtofh(nfsm_info_t info, struct vnode *dvp,
 148                                 struct vnode **vpp, int *gotvpp);
 149 int     nfsm_getfh(nfsm_info_t info, nfsfh_t **fhpp);
 150 int     nfsm_loadattr(nfsm_info_t info, struct vnode *vp, struct vattr *vap);
 151 int     nfsm_postop_attr(nfsm_info_t info, struct vnode *vp,
 152                                 int *attrp, int lflags);
 153 int     nfsm_wcc_data(nfsm_info_t info, struct vnode *vp, int *attrp);
 154 void    nfsm_v3attrbuild(nfsm_info_t info, struct vattr *vap, int full);
 155 int     nfsm_strsiz(nfsm_info_t info, int maxlen);
 156 int     nfsm_srvstrsiz(nfsm_info_t info, int maxlen, int *errorp);
 157 int     nfsm_srvnamesiz(nfsm_info_t info, int *errorp);
 158 int     nfsm_mtouio(nfsm_info_t info, struct uio *uiop, int len);
 159 int     nfsm_mtobio(nfsm_info_t info, struct bio *bio, int len);
 160
 161 int     nfsm_uiotom(nfsm_info_t info, struct uio *uiop, int len);
 162 int     nfsm_biotom(nfsm_info_t info, struct bio *bio, int off, int len);
 163 int     nfsm_request(nfsm_info_t info, struct vnode *vp, int procnum,
 164                                 thread_t td, struct ucred *cred, int *errorp);
 165 void    nfsm_request_bio(nfsm_info_t info, struct vnode *vp, int procnum,
 166                                 thread_t td, struct ucred *cred);
 167 int     nfsm_strtom(nfsm_info_t info, const void *data, int len, int maxlen);
 168 int     nfsm_reply(nfsm_info_t info, struct nfsrv_descript *nfsd,
 169                                 struct nfssvc_sock *slp, int siz, int *errorp);
 170 void    nfsm_writereply(nfsm_info_t info, struct nfsrv_descript *nfsd,
 171                                 struct nfssvc_sock *slp, int error, int siz);
 172 int     nfsm_adv(nfsm_info_t info, int len);
 173 int     nfsm_srvmtofh(nfsm_info_t info, struct nfsrv_descript *nfsd,
 174                                 fhandle_t *fhp, int *errorp);
 175 void    *_nfsm_clget(nfsm_info_t info, struct mbuf **mp1, struct mbuf **mp2,
 176                                 char **bp, char **be);
 177 int     nfsm_srvsattr(nfsm_info_t info, struct vattr *vap);
 178 int     nfsm_mbuftouio(struct mbuf **mrep, struct uio *uiop,
 179                                 int siz, caddr_t *dpos);
 180 int     nfsm_mbuftobio(struct mbuf **mrep, struct bio *bio,
 181                                 int siz, caddr_t *dpos);
 182 int     nfsm_uiotombuf (struct uio *uiop, struct mbuf **mq,
 183                                 int siz, caddr_t *bpos);
 184 int     nfsm_biotombuf (struct bio *bio, struct mbuf **mq, int off,
 185                                 int siz, caddr_t *bpos);
 186 int     nfsm_disct(struct mbuf **mdp, caddr_t *dposp, int siz,
 187                                 int left, caddr_t *cp2);
 188 int     nfsm_strtmbuf (struct mbuf **, char **, const char *, long);
 189 void    nfsm_adj(struct mbuf *mp, int len, int nul);
 190 void    nfsm_srvwcc_data(nfsm_info_t info, struct nfsrv_descript *nfsd,
 191                                 int before_ret, struct vattr *before_vap,
 192                                 int after_ret, struct vattr *after_vap);
 193 void    nfsm_srvpostop_attr(nfsm_info_t info, struct nfsrv_descript *nfsd,
 194                                 int after_ret, struct vattr *after_vap);
 195 void    nfsm_srvfattr(struct nfsrv_descript *nfsd, struct vattr *vap,
 196                                 struct nfs_fattr *fp);
 197
 198 int     nfs_request (struct nfsm_info *, nfsm_state_t, nfsm_state_t);
 199
 200 #define nfsm_clget(info, mp1, mp2, bp, be)      \
 201         ((bp >= be) ? _nfsm_clget(info, &mp1, &mp2, &bp, &be) : (void *)bp)
 202
 203 #define nfsm_rndup(a)   (((a) + 3) & (~0x3))
 204
 205 #define NFSV3_WCCRATTR  0
 206 #define NFSV3_WCCCHK    1
 207
 208 #endif