Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/nfsserver/nfs.h
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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 /* 44 * Tunable constants for nfs 45 */ 46 47 #define NFS_TICKINTVL 10 /* Desired time for a tick (msec) */ 48 #define NFS_HZ (hz / nfs_ticks) /* Ticks/sec */ 49 #define NFS_TIMEO (1 * NFS_HZ) /* Default timeout = 1 second */ 50 #define NFS_MINTIMEO (1 * NFS_HZ) /* Min timeout to use */ 51 #define NFS_MAXTIMEO (60 * NFS_HZ) /* Max timeout to backoff to */ 52 #define NFS_MINIDEMTIMEO (5 * NFS_HZ) /* Min timeout for non-idempotent ops*/ 53 #define NFS_MAXUIDHASH 64 /* Max. # of hashed uid entries/mp */ 54 #ifndef NFS_GATHERDELAY 55 #define NFS_GATHERDELAY 10 /* Default write gather delay (msec) */ 56 #endif 57 #ifdef _KERNEL 58 #define DIRBLKSIZ 512 /* XXX we used to use ufs's DIRBLKSIZ */ 59 #endif 60 61 /* 62 * Oddballs 63 */ 64 #define NFS_SRVMAXDATA(n) \ 65 (((n)->nd_flag & ND_NFSV3) ? (((n)->nd_nam2) ? \ 66 NFS_MAXDGRAMDATA : NFS_MAXDATA) : NFS_V2MAXDATA) 67 68 /* 69 * XXX 70 * The B_INVAFTERWRITE flag should be set to whatever is required by the 71 * buffer cache code to say "Invalidate the block after it is written back". 72 */ 73 #define B_INVAFTERWRITE B_NOCACHE 74 75 /* 76 * The IO_METASYNC flag should be implemented for local filesystems. 77 * (Until then, it is nothin at all.) 78 */ 79 #ifndef IO_METASYNC 80 #define IO_METASYNC 0 81 #endif 82 83 84 /* NFS state flags XXX -Wunused */ 85 #define NFSRV_SNDLOCK 0x01000000 /* Send socket lock */ 86 #define NFSRV_WANTSND 0x02000000 /* Want above */ 87 88 /* 89 * Structures for the nfssvc(2) syscall. Not that anyone but nfsd and mount_nfs 90 * should ever try and use it. 91 */ 92 struct nfsd_args { 93 int sock; /* Socket to serve */ 94 caddr_t name; /* Client addr for connection based sockets */ 95 int namelen; /* Length of name */ 96 }; 97 98 /* 99 * XXX to allow amd to include nfs.h without nfsproto.h 100 */ 101 #ifdef NFS_NPROCS 102 #include <nfsserver/nfsrvstats.h> 103 #endif 104 105 /* 106 * Flags for nfssvc() system call. 107 */ 108 #define NFSSVC_NFSD 0x004 109 #define NFSSVC_ADDSOCK 0x008 110 111 /* 112 * vfs.nfsrv sysctl(3) identifiers 113 */ 114 #define NFS_NFSRVSTATS 1 /* struct: struct nfsrvstats */ 115 #define NFS_NFSPRIVPORT 2 /* int: prohibit nfs to resvports */ 116 117 #ifdef _KERNEL 118 119 extern struct mtx nfsd_mtx; 120 #define NFSD_LOCK_ASSERT() mtx_assert(&nfsd_mtx, MA_OWNED) 121 #define NFSD_UNLOCK_ASSERT() mtx_assert(&nfsd_mtx, MA_NOTOWNED) 122 #define NFSD_LOCK_DONTCARE() 123 #define NFSD_LOCK() mtx_lock(&nfsd_mtx) 124 #define NFSD_UNLOCK() mtx_unlock(&nfsd_mtx) 125 126 #ifdef MALLOC_DECLARE 127 MALLOC_DECLARE(M_NFSRVDESC); 128 MALLOC_DECLARE(M_NFSD); 129 #endif 130 131 /* Forward declarations */ 132 struct nfssvc_sock; 133 struct nfsrv_descript; 134 struct uio; 135 struct vattr; 136 struct nameidata; 137 138 extern struct callout nfsrv_callout; 139 extern struct nfsrvstats nfsrvstats; 140 141 extern int nfsrv_ticks; 142 extern int nfsrvw_procrastinate; 143 extern int nfsrvw_procrastinate_v3; 144 extern int nfsrv_numnfsd; 145 146 /* Various values converted to XDR form. */ 147 extern u_int32_t nfsrv_nfs_false, nfsrv_nfs_true, nfsrv_nfs_xdrneg1, 148 nfsrv_nfs_prog; 149 extern u_int32_t nfsrv_rpc_reply, nfsrv_rpc_msgdenied, nfsrv_rpc_mismatch, 150 nfsrv_rpc_vers; 151 extern u_int32_t nfsrv_rpc_auth_unix, nfsrv_rpc_msgaccepted, nfsrv_rpc_call, 152 nfsrv_rpc_autherr; 153 154 /* Procedure table data */ 155 extern const int nfsrvv2_procid[NFS_NPROCS]; 156 extern const int nfsrv_nfsv3_procid[NFS_NPROCS]; 157 extern int32_t (*nfsrv3_procs[NFS_NPROCS])(struct nfsrv_descript *nd, 158 struct nfssvc_sock *slp, struct thread *td, 159 struct mbuf **mreqp); 160 161 /* 162 * A list of nfssvc_sock structures is maintained with all the sockets 163 * that require service by the nfsd. 164 */ 165 #ifndef NFS_WDELAYHASHSIZ 166 #define NFS_WDELAYHASHSIZ 16 /* and with this */ 167 #endif 168 #define NWDELAYHASH(sock, f) \ 169 (&(sock)->ns_wdelayhashtbl[(*((u_int32_t *)(f))) % NFS_WDELAYHASHSIZ]) 170 171 /* 172 * Network address hash list element 173 */ 174 union nethostaddr { 175 u_int32_t had_inetaddr; 176 struct sockaddr *had_nam; 177 }; 178 179 struct nfsrv_rec { 180 STAILQ_ENTRY(nfsrv_rec) nr_link; 181 struct sockaddr *nr_address; 182 struct mbuf *nr_packet; 183 }; 184 185 struct nfssvc_sock { 186 TAILQ_ENTRY(nfssvc_sock) ns_chain; /* List of all nfssvc_sock's */ 187 struct file *ns_fp; 188 struct socket *ns_so; 189 struct sockaddr *ns_nam; 190 struct mbuf *ns_raw; 191 struct mbuf *ns_rawend; 192 STAILQ_HEAD(, nfsrv_rec) ns_rec; 193 struct mbuf *ns_frag; 194 int ns_flag; 195 int ns_solock; 196 int ns_cc; 197 int ns_reclen; 198 u_int32_t ns_sref; 199 LIST_HEAD(, nfsrv_descript) ns_tq; /* Write gather lists */ 200 LIST_HEAD(nfsrvw_delayhash, nfsrv_descript) ns_wdelayhashtbl[NFS_WDELAYHASHSIZ]; 201 }; 202 203 /* Bits for "ns_flag" */ 204 #define SLP_VALID 0x01 /* Socket valid for use (XXX) */ 205 #define SLP_DOREC 0x02 /* Socket ready for processing */ 206 #define SLP_NEEDQ 0x04 /* Socket has request queued */ 207 #define SLP_DISCONN 0x08 /* Error received from stream socket */ 208 #define SLP_GETSTREAM 0x10 /* nfsrv_getstream in prog on sock */ 209 #define SLP_LASTFRAG 0x20 /* Socket received end-of-record */ 210 #define SLP_ALLFLAGS 0xff 211 212 extern TAILQ_HEAD(nfssvc_sockhead, nfssvc_sock) nfssvc_sockhead; 213 extern int nfssvc_sockhead_flag; 214 #define SLP_INIT 0x01 215 #define SLP_WANTINIT 0x02 216 217 /* 218 * One of these structures is allocated for each nfsd. 219 */ 220 struct nfsd { 221 TAILQ_ENTRY(nfsd) nfsd_chain; /* List of all nfsd's */ 222 int nfsd_flag; /* NFSD_ flags */ 223 struct nfssvc_sock *nfsd_slp; /* Current socket */ 224 int nfsd_authlen; /* Authenticator len */ 225 u_char nfsd_authstr[RPCAUTH_MAXSIZ]; /* Authenticator data */ 226 int nfsd_verflen; /* and the Verifier */ 227 u_char nfsd_verfstr[RPCVERF_MAXSIZ]; 228 struct thread *nfsd_td; /* daemon thread ptr */ 229 struct nfsrv_descript *nfsd_nd; /* Associated nfsrv_descript */ 230 }; 231 232 /* Bits for "nfsd_flag" */ 233 #define NFSD_WAITING 0x01 234 #define NFSD_REQINPROG 0x02 235 236 /* 237 * This structure is used by the server for describing each request. 238 * Some fields are used only when write request gathering is performed. 239 */ 240 struct nfsrv_descript { 241 u_quad_t nd_time; /* Write deadline (usec) */ 242 off_t nd_off; /* Start byte offset */ 243 off_t nd_eoff; /* and end byte offset */ 244 LIST_ENTRY(nfsrv_descript) nd_hash; /* Hash list */ 245 LIST_ENTRY(nfsrv_descript) nd_tq; /* and timer list */ 246 LIST_HEAD(, nfsrv_descript) nd_coalesce;/* coalesced writes */ 247 struct mbuf *nd_mrep; /* Request mbuf list */ 248 struct mbuf *nd_md; /* Current dissect mbuf */ 249 struct mbuf *nd_mreq; /* Reply mbuf list */ 250 struct sockaddr *nd_nam; /* and socket addr */ 251 struct sockaddr *nd_nam2; /* return socket addr */ 252 caddr_t nd_dpos; /* Current dissect pos */ 253 u_int32_t nd_procnum; /* RPC # */ 254 int nd_stable; /* storage type */ 255 int nd_flag; /* nd_flag */ 256 int nd_len; /* Length of this write */ 257 int nd_repstat; /* Reply status */ 258 u_int32_t nd_retxid; /* Reply xid */ 259 struct timeval nd_starttime; /* Time RPC initiated */ 260 fhandle_t nd_fh; /* File handle */ 261 struct ucred *nd_cr; /* Credentials */ 262 }; 263 264 /* Bits for "nd_flag" */ 265 #define ND_NFSV3 0x08 266 267 extern TAILQ_HEAD(nfsd_head, nfsd) nfsd_head; 268 extern int nfsd_head_flag; 269 #define NFSD_CHECKSLP 0x01 270 271 /* 272 * These macros compare nfsrv_descript structures. 273 */ 274 #define NFSW_CONTIG(o, n) \ 275 ((o)->nd_eoff >= (n)->nd_off && \ 276 !bcmp((caddr_t)&(o)->nd_fh, (caddr_t)&(n)->nd_fh, NFSX_V3FH)) 277 278 /* 279 * Defines for WebNFS 280 */ 281 282 #define WEBNFS_ESC_CHAR '%' 283 #define WEBNFS_SPECCHAR_START 0x80 284 285 #define WEBNFS_NATIVE_CHAR 0x80 286 /* 287 * .. 288 * Possibly more here in the future. 289 */ 290 291 /* 292 * Macro for converting escape characters in WebNFS pathnames. 293 * Should really be in libkern. 294 */ 295 296 #define HEXTOC(c) \ 297 ((c) >= 'a' ? ((c) - ('a' - 10)) : \ 298 ((c) >= 'A' ? ((c) - ('A' - 10)) : ((c) - ''))) 299 #define HEXSTRTOI(p) \ 300 ((HEXTOC(p[0]) << 4) + HEXTOC(p[1])) 301 302 #ifdef NFS_DEBUG 303 304 extern int nfs_debug; 305 #define NFS_DEBUG_ASYNCIO 1 /* asynchronous i/o */ 306 #define NFS_DEBUG_WG 2 /* server write gathering */ 307 #define NFS_DEBUG_RC 4 /* server request caching */ 308 309 #define NFS_DPF(cat, args) \ 310 do { \ 311 if (nfs_debug & NFS_DEBUG_##cat) printf args; \ 312 } while (0) 313 314 #else 315 316 #define NFS_DPF(cat, args) 317 318 #endif 319 320 int nfs_getreq(struct nfsrv_descript *, struct nfsd *, int); 321 int nfsrv_send(struct socket *, struct sockaddr *, struct mbuf *); 322 struct mbuf *nfs_rephead(int, struct nfsrv_descript *, int, struct mbuf **, 323 caddr_t *); 324 int nfs_slplock(struct nfssvc_sock *, int); 325 void nfs_slpunlock(struct nfssvc_sock *); 326 void nfsm_srvfattr(struct nfsrv_descript *, struct vattr *, 327 struct nfs_fattr *); 328 void nfsm_srvwcc(struct nfsrv_descript *, int, struct vattr *, int, 329 struct vattr *, struct mbuf **, char **); 330 void nfsm_srvpostopattr(struct nfsrv_descript *, int, struct vattr *, 331 struct mbuf **, char **); 332 int netaddr_match(int, union nethostaddr *, struct sockaddr *); 333 int nfs_namei(struct nameidata *, fhandle_t *, int, 334 struct nfssvc_sock *, struct sockaddr *, struct mbuf **, 335 caddr_t *, struct vnode **, int, struct vattr *, int *, 336 struct thread *, int); 337 void nfsm_adj(struct mbuf *, int, int); 338 int nfsm_mbuftouio(struct mbuf **, struct uio *, int, caddr_t *); 339 void nfsrv_initcache(void); 340 void nfsrv_destroycache(void); 341 void nfsrv_timer(void *); 342 int nfsrv_dorec(struct nfssvc_sock *, struct nfsd *, 343 struct nfsrv_descript **); 344 int nfsrv_getcache(struct nfsrv_descript *, struct mbuf **); 345 void nfsrv_updatecache(struct nfsrv_descript *, int, struct mbuf *); 346 void nfsrv_cleancache(void); 347 void nfsrv_init(int); 348 int nfsrv_errmap(struct nfsrv_descript *, int); 349 void nfsrvw_sort(gid_t *, int); 350 void nfsrv_wakenfsd(struct nfssvc_sock *slp); 351 int nfsrv_writegather(struct nfsrv_descript **, struct nfssvc_sock *, 352 struct thread *, struct mbuf **); 353 354 int nfsrv3_access(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, 355 struct thread *td, struct mbuf **mrq); 356 int nfsrv_commit(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, 357 struct thread *td, struct mbuf **mrq); 358 int nfsrv_create(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, 359 struct thread *td, struct mbuf **mrq); 360 int nfsrv_fhtovp(fhandle_t *, int, struct vnode **, int *, struct ucred *, 361 struct nfssvc_sock *, struct sockaddr *, int *, int); 362 int nfsrv_setpublicfs(struct mount *, struct netexport *, 363 struct export_args *); 364 int nfs_ispublicfh(fhandle_t *); 365 int nfsrv_fsinfo(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, 366 struct thread *td, struct mbuf **mrq); 367 int nfsrv_getattr(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, 368 struct thread *td, struct mbuf **mrq); 369 int nfsrv_link(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, 370 struct thread *td, struct mbuf **mrq); 371 int nfsrv_lookup(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, 372 struct thread *td, struct mbuf **mrq); 373 int nfsrv_mkdir(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, 374 struct thread *td, struct mbuf **mrq); 375 int nfsrv_mknod(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, 376 struct thread *td, struct mbuf **mrq); 377 int nfsrv_noop(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, 378 struct thread *td, struct mbuf **mrq); 379 int nfsrv_null(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, 380 struct thread *td, struct mbuf **mrq); 381 int nfsrv_pathconf(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, 382 struct thread *td, struct mbuf **mrq); 383 int nfsrv_read(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, 384 struct thread *td, struct mbuf **mrq); 385 int nfsrv_readdir(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, 386 struct thread *td, struct mbuf **mrq); 387 int nfsrv_readdirplus(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, 388 struct thread *td, struct mbuf **mrq); 389 int nfsrv_readlink(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, 390 struct thread *td, struct mbuf **mrq); 391 int nfsrv_remove(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, 392 struct thread *td, struct mbuf **mrq); 393 int nfsrv_rename(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, 394 struct thread *td, struct mbuf **mrq); 395 int nfsrv_rmdir(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, 396 struct thread *td, struct mbuf **mrq); 397 int nfsrv_setattr(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, 398 struct thread *td, struct mbuf **mrq); 399 int nfsrv_statfs(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, 400 struct thread *td, struct mbuf **mrq); 401 int nfsrv_symlink(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, 402 struct thread *td, struct mbuf **mrq); 403 int nfsrv_write(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, 404 struct thread *td, struct mbuf **mrq); 405 void nfsrv_rcv(struct socket *so, void *arg, int waitflag); 406 void nfsrv_slpderef(struct nfssvc_sock *slp); 407 #endif /* _KERNEL */ 408 409 #endif
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