sys/nfsserver/nfs.h

   1 /*-
   2  * Copyright (c) 1989, 1993, 1995
   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  * 4. 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  *      @(#)nfs.h       8.4 (Berkeley) 5/1/95
  33  * $FreeBSD$
  34  */
  35
  36 #ifndef _NFSSERVER_NFS_H_
  37 #define _NFSSERVER_NFS_H_
  38
  39 #ifdef _KERNEL
  40 #include "opt_nfs.h"
  41 #endif
  42
  43 #include <nfs/nfssvc.h>
  44
  45 /*
  46  * Tunable constants for nfs
  47  */
  48
  49 #define NFS_TICKINTVL   10              /* Desired time for a tick (msec) */
  50 #define NFS_HZ          (hz / nfs_ticks) /* Ticks/sec */
  51 #define NFS_TIMEO       (1 * NFS_HZ)    /* Default timeout = 1 second */
  52 #define NFS_MINTIMEO    (1 * NFS_HZ)    /* Min timeout to use */
  53 #define NFS_MAXTIMEO    (60 * NFS_HZ)   /* Max timeout to backoff to */
  54 #define NFS_MINIDEMTIMEO (5 * NFS_HZ)   /* Min timeout for non-idempotent ops*/
  55 #define NFS_MAXUIDHASH  64              /* Max. # of hashed uid entries/mp */
  56 #ifndef NFS_GATHERDELAY
  57 #define NFS_GATHERDELAY         10      /* Default write gather delay (msec) */
  58 #endif
  59 #ifdef _KERNEL
  60 #define DIRBLKSIZ       512             /* XXX we used to use ufs's DIRBLKSIZ */
  61 #endif
  62
  63 /*
  64  * Oddballs
  65  */
  66 #define NFS_SRVMAXDATA(n) \
  67                 (((n)->nd_flag & ND_NFSV3) ? (((n)->nd_nam2) ? \
  68                  NFS_MAXDGRAMDATA : NFS_MAXDATA) : NFS_V2MAXDATA)
  69
  70 /*
  71  * XXX
  72  * The B_INVAFTERWRITE flag should be set to whatever is required by the
  73  * buffer cache code to say "Invalidate the block after it is written back".
  74  */
  75 #define B_INVAFTERWRITE B_NOCACHE
  76
  77 /*
  78  * The IO_METASYNC flag should be implemented for local filesystems.
  79  * (Until then, it is nothin at all.)
  80  */
  81 #ifndef IO_METASYNC
  82 #define IO_METASYNC     0
  83 #endif
  84
  85 /* NFS state flags XXX -Wunused */
  86 #define NFSRV_SNDLOCK           0x01000000  /* Send socket lock */
  87 #define NFSRV_WANTSND           0x02000000  /* Want above */
  88
  89 /*
  90  * Structures for the nfssvc(2) syscall.  Not that anyone but nfsd and
  91  * mount_nfs should ever try and use it.
  92  */
  93
  94 /*
  95  * Add a socket to monitor for NFS requests.
  96  */
  97 struct nfsd_addsock_args {
  98         int     sock;           /* Socket to serve */
  99         caddr_t name;           /* Client addr for connection based sockets */
 100         int     namelen;        /* Length of name */
 101 };
 102
 103 /*
 104  * Start processing requests.
 105  */
 106 struct nfsd_nfsd_args {
 107         const char *principal;  /* GSS-API service principal name */
 108         int     minthreads;     /* minimum service thread count */
 109         int     maxthreads;     /* maximum service thread count */
 110 };
 111
 112 /*
 113  * XXX to allow amd to include nfs.h without nfsproto.h
 114  */
 115 #ifdef NFS_NPROCS
 116 #include <nfsserver/nfsrvstats.h>
 117 #endif
 118
 119 /*
 120  * vfs.nfsrv sysctl(3) identifiers
 121  */
 122 #define NFS_NFSRVSTATS  1               /* struct: struct nfsrvstats */
 123 #define NFS_NFSPRIVPORT 2               /* int: prohibit nfs to resvports */
 124
 125 #ifdef _KERNEL
 126
 127 extern struct mtx nfsd_mtx;
 128 #define NFSD_LOCK_ASSERT()      mtx_assert(&nfsd_mtx, MA_OWNED)
 129 #define NFSD_UNLOCK_ASSERT()    mtx_assert(&nfsd_mtx, MA_NOTOWNED)
 130 #define NFSD_LOCK_DONTCARE()
 131 #define NFSD_LOCK()     mtx_lock(&nfsd_mtx)
 132 #define NFSD_UNLOCK()   mtx_unlock(&nfsd_mtx)
 133
 134 #ifdef MALLOC_DECLARE
 135 MALLOC_DECLARE(M_NFSRVDESC);
 136 MALLOC_DECLARE(M_NFSD);
 137 #endif
 138
 139 /* Forward declarations */
 140 struct nfssvc_sock;
 141 struct nfsrv_descript;
 142 struct uio;
 143 struct vattr;
 144 struct nameidata;
 145
 146 extern struct callout nfsrv_callout;
 147 extern struct nfsrvstats nfsrvstats;
 148
 149 extern int      nfsrv_ticks;
 150 extern int      nfsrvw_procrastinate;
 151 extern int      nfsrvw_procrastinate_v3;
 152 extern int      nfsrv_numnfsd;
 153
 154 /* Various values converted to XDR form. */
 155 extern u_int32_t nfsrv_nfs_false, nfsrv_nfs_true, nfsrv_nfs_xdrneg1,
 156         nfsrv_nfs_prog;
 157 extern u_int32_t nfsrv_rpc_reply, nfsrv_rpc_msgdenied, nfsrv_rpc_mismatch,
 158         nfsrv_rpc_vers;
 159 extern u_int32_t nfsrv_rpc_auth_unix, nfsrv_rpc_msgaccepted, nfsrv_rpc_call,
 160         nfsrv_rpc_autherr;
 161
 162 /* Procedure table data */
 163 extern const int        nfsrvv2_procid[NFS_NPROCS];
 164 extern const int        nfsrv_nfsv3_procid[NFS_NPROCS];
 165 extern int32_t (*nfsrv3_procs[NFS_NPROCS])(struct nfsrv_descript *nd,
 166                     struct nfssvc_sock *slp, struct mbuf **mreqp);
 167
 168 /*
 169  * A list of nfssvc_sock structures is maintained with all the sockets
 170  * that require service by the nfsd.
 171  */
 172 #ifndef NFS_WDELAYHASHSIZ
 173 #define NFS_WDELAYHASHSIZ 16    /* and with this */
 174 #endif
 175 #define NWDELAYHASH(sock, f) \
 176         (&(sock)->ns_wdelayhashtbl[(*((u_int32_t *)(f))) % NFS_WDELAYHASHSIZ])
 177
 178 /*
 179  * This structure is used by the server for describing each request.
 180  */
 181 struct nfsrv_descript {
 182         struct mbuf             *nd_mrep;       /* Request mbuf list */
 183         struct mbuf             *nd_md;         /* Current dissect mbuf */
 184         struct mbuf             *nd_mreq;       /* Reply mbuf list */
 185         struct sockaddr         *nd_nam;        /* and socket addr */
 186         struct sockaddr         *nd_nam2;       /* return socket addr */
 187         caddr_t                 nd_dpos;        /* Current dissect pos */
 188         u_int32_t               nd_procnum;     /* RPC # */
 189         int                     nd_stable;      /* storage type */
 190         int                     nd_flag;        /* nd_flag */
 191         int                     nd_repstat;     /* Reply status */
 192         fhandle_t               nd_fh;          /* File handle */
 193         struct ucred            *nd_cr;         /* Credentials */
 194         int                     nd_credflavor;  /* Security flavor */
 195 };
 196
 197 /* Bits for "nd_flag" */
 198 #define ND_NFSV3        0x08
 199
 200 /*
 201  * Defines for WebNFS
 202  */
 203
 204 #define WEBNFS_ESC_CHAR         '%'
 205 #define WEBNFS_SPECCHAR_START   0x80
 206
 207 #define WEBNFS_NATIVE_CHAR      0x80
 208 /*
 209  * ..
 210  * Possibly more here in the future.
 211  */
 212
 213 /*
 214  * Macro for converting escape characters in WebNFS pathnames.
 215  * Should really be in libkern.
 216  */
 217
 218 #define HEXTOC(c) \
 219         ((c) >= 'a' ? ((c) - ('a' - 10)) : \
 220             ((c) >= 'A' ? ((c) - ('A' - 10)) : ((c) - '0')))
 221 #define HEXSTRTOI(p) \
 222         ((HEXTOC(p[0]) << 4) + HEXTOC(p[1]))
 223
 224 #ifdef NFS_DEBUG
 225
 226 extern int nfs_debug;
 227 #define NFS_DEBUG_ASYNCIO       1 /* asynchronous i/o */
 228 #define NFS_DEBUG_WG            2 /* server write gathering */
 229 #define NFS_DEBUG_RC            4 /* server request caching */
 230
 231 #define NFS_DPF(cat, args)                                      \
 232         do {                                                    \
 233                 if (nfs_debug & NFS_DEBUG_##cat) printf args;   \
 234         } while (0)
 235
 236 #else
 237
 238 #define NFS_DPF(cat, args)
 239
 240 #endif
 241
 242 /*
 243  * The following flags can be passed to nfsrv_fhtovp() function.
 244  */
 245 /* Leave file system busy on success. */
 246 #define NFSRV_FLAG_BUSY         0x01
 247
 248 struct mbuf *nfs_rephead(int, struct nfsrv_descript *, int, struct mbuf **,
 249             caddr_t *);
 250 void    nfsm_srvfattr(struct nfsrv_descript *, struct vattr *,
 251             struct nfs_fattr *);
 252 void    nfsm_srvwcc(struct nfsrv_descript *, int, struct vattr *, int,
 253             struct vattr *, struct mbuf **, char **);
 254 void    nfsm_srvpostopattr(struct nfsrv_descript *, int, struct vattr *,
 255             struct mbuf **, char **);
 256 int     nfs_namei(struct nameidata *, struct nfsrv_descript *, fhandle_t *,
 257             int, struct nfssvc_sock *, struct sockaddr *, struct mbuf **,
 258             caddr_t *, struct vnode **, int, struct vattr *, int *, int);
 259 void    nfsm_adj(struct mbuf *, int, int);
 260 int     nfsm_mbuftouio(struct mbuf **, struct uio *, int, caddr_t *);
 261 void    nfsrv_init(int);
 262 int     nfsrv_errmap(struct nfsrv_descript *, int);
 263 void    nfsrvw_sort(gid_t *, int);
 264
 265 int     nfsrv3_access(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
 266             struct mbuf **mrq);
 267 int     nfsrv_commit(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
 268             struct mbuf **mrq);
 269 int     nfsrv_create(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
 270             struct mbuf **mrq);
 271 int     nfsrv_fhtovp(fhandle_t *, int, struct vnode **,
 272             struct nfsrv_descript *, struct nfssvc_sock *, struct sockaddr *,
 273             int *);
 274 int     nfsrv_setpublicfs(struct mount *, struct netexport *,
 275             struct export_args *);
 276 int     nfs_ispublicfh(fhandle_t *);
 277 int     nfsrv_fsinfo(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
 278             struct mbuf **mrq);
 279 int     nfsrv_getattr(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
 280             struct mbuf **mrq);
 281 int     nfsrv_link(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
 282             struct mbuf **mrq);
 283 int     nfsrv_lookup(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
 284             struct mbuf **mrq);
 285 int     nfsrv_mkdir(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
 286             struct mbuf **mrq);
 287 int     nfsrv_mknod(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
 288             struct mbuf **mrq);
 289 int     nfsrv_noop(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
 290             struct mbuf **mrq);
 291 int     nfsrv_null(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
 292             struct mbuf **mrq);
 293 int     nfsrv_pathconf(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
 294             struct mbuf **mrq);
 295 int     nfsrv_read(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
 296             struct mbuf **mrq);
 297 int     nfsrv_readdir(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
 298             struct mbuf **mrq);
 299 int     nfsrv_readdirplus(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
 300             struct mbuf **mrq);
 301 int     nfsrv_readlink(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
 302             struct mbuf **mrq);
 303 int     nfsrv_remove(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
 304             struct mbuf **mrq);
 305 int     nfsrv_rename(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
 306             struct mbuf **mrq);
 307 int     nfsrv_rmdir(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
 308             struct mbuf **mrq);
 309 int     nfsrv_setattr(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
 310             struct mbuf **mrq);
 311 int     nfsrv_statfs(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
 312             struct mbuf **mrq);
 313 int     nfsrv_symlink(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
 314             struct mbuf **mrq);
 315 int     nfsrv_write(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
 316             struct mbuf **mrq);
 317 /*
 318  * #ifdef _SYS_SYSPROTO_H_ so that it is only defined when sysproto.h
 319  * has been included, so that "struct nfssvc_args" is defined.
 320  */
 321 #ifdef _SYS_SYSPROTO_H_
 322 int nfssvc_nfsserver(struct thread *, struct nfssvc_args *);
 323 #endif
 324 #endif  /* _KERNEL */
 325
 326 #endif