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 _NFSCLIENT_NFS_H_ 37 #define _NFSCLIENT_NFS_H_ 38 39 #ifdef _KERNEL 40 #include "opt_nfs.h" 41 #endif 42 43 #include <nfsclient/nfsargs.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_MAXREXMIT 100 /* Stop counting after this many */ 56 #define NFS_RETRANS 10 /* Num of retrans for UDP soft mounts */ 57 #define NFS_RETRANS_TCP 2 /* Num of retrans for TCP soft mounts */ 58 #define NFS_MAXGRPS 16 /* Max. size of groups list */ 59 #ifndef NFS_MINATTRTIMO 60 #define NFS_MINATTRTIMO 3 /* VREG attrib cache timeout in sec */ 61 #endif 62 #ifndef NFS_MAXATTRTIMO 63 #define NFS_MAXATTRTIMO 60 64 #endif 65 #ifndef NFS_MINDIRATTRTIMO 66 #define NFS_MINDIRATTRTIMO 30 /* VDIR attrib cache timeout in sec */ 67 #endif 68 #ifndef NFS_MAXDIRATTRTIMO 69 #define NFS_MAXDIRATTRTIMO 60 70 #endif 71 #define NFS_WSIZE 8192 /* Def. write data size <= 8192 */ 72 #define NFS_RSIZE 8192 /* Def. read data size <= 8192 */ 73 #define NFS_READDIRSIZE 8192 /* Def. readdir size */ 74 #define NFS_DEFRAHEAD 1 /* Def. read ahead # blocks */ 75 #define NFS_MAXRAHEAD 4 /* Max. read ahead # blocks */ 76 #define NFS_MAXASYNCDAEMON 64 /* Max. number async_daemons runnable */ 77 #define NFS_DIRBLKSIZ 4096 /* Must be a multiple of DIRBLKSIZ */ 78 #ifdef _KERNEL 79 #define DIRBLKSIZ 512 /* XXX we used to use ufs's DIRBLKSIZ */ 80 #endif 81 #define NFS_MAXDEADTHRESH 9 /* How long till we say 'server not responding' */ 82 83 /* 84 * Oddballs 85 */ 86 #define NFS_CMPFH(n, f, s) \ 87 ((n)->n_fhsize == (s) && !bcmp((caddr_t)(n)->n_fhp, (caddr_t)(f), (s))) 88 #define NFS_ISV3(v) (VFSTONFS((v)->v_mount)->nm_flag & NFSMNT_NFSV3) 89 #define NFS_ISV4(v) (VFSTONFS((v)->v_mount)->nm_flag & NFSMNT_NFSV4) 90 91 #define NFSSTA_HASWRITEVERF 0x00040000 /* Has write verifier for V3 */ 92 #define NFSSTA_GOTFSINFO 0x00100000 /* Got the V3 fsinfo */ 93 #define NFSSTA_SNDLOCK 0x01000000 /* Send socket lock */ 94 #define NFSSTA_WANTSND 0x02000000 /* Want above */ 95 #define NFSSTA_TIMEO 0x10000000 /* Experiencing a timeout */ 96 97 98 /* 99 * XXX to allow amd to include nfs.h without nfsproto.h 100 */ 101 #ifdef NFS_NPROCS 102 #include <nfsclient/nfsstats.h> 103 #endif 104 105 /* 106 * vfs.nfs sysctl(3) identifiers 107 */ 108 #define NFS_NFSSTATS 1 /* struct: struct nfsstats */ 109 110 /* 111 * File context information for nfsv4. Currently, there is only one 112 * lockowner for the whole machine "0." 113 */ 114 struct nfs4_fctx { 115 TAILQ_ENTRY(nfs4_fstate) next; 116 uint32_t refcnt; 117 struct nfs4_lowner *lop; 118 struct nfsnode *np; 119 char stateid[NFSX_V4STATEID]; 120 }; 121 122 #ifdef _KERNEL 123 124 #ifdef MALLOC_DECLARE 125 MALLOC_DECLARE(M_NFSREQ); 126 MALLOC_DECLARE(M_NFSDIROFF); 127 MALLOC_DECLARE(M_NFSBIGFH); 128 MALLOC_DECLARE(M_NFSHASH); 129 MALLOC_DECLARE(M_NFSDIRECTIO); 130 #endif 131 132 extern struct uma_zone *nfsmount_zone; 133 134 extern struct callout nfs_callout; 135 extern struct nfsstats nfsstats; 136 extern struct mtx nfs_iod_mtx; 137 138 extern int nfs_numasync; 139 extern unsigned int nfs_iodmax; 140 extern int nfs_pbuf_freecnt; 141 extern int nfs_ticks; 142 143 /* Data constants in XDR form */ 144 extern u_int32_t nfs_true, nfs_false, nfs_xdrneg1; 145 extern u_int32_t rpc_reply, rpc_msgdenied, rpc_mismatch, rpc_vers; 146 extern u_int32_t rpc_auth_unix, rpc_msgaccepted, rpc_call, rpc_autherr; 147 148 extern int nfsv3_procid[NFS_NPROCS]; 149 150 struct uio; 151 struct buf; 152 struct vattr; 153 struct nameidata; 154 155 /* 156 * Socket errors ignored for connectionless sockets?? 157 * For now, ignore them all 158 */ 159 #define NFSIGNORE_SOERROR(s, e) \ 160 ((e) != EINTR && (e) != EIO && \ 161 (e) != ERESTART && (e) != EWOULDBLOCK && \ 162 ((s) & PR_CONNREQUIRED) == 0) 163 164 /* 165 * Nfs outstanding request list element 166 */ 167 struct nfsreq { 168 TAILQ_ENTRY(nfsreq) r_chain; 169 struct mbuf *r_mreq; 170 struct mbuf *r_mrep; 171 struct mbuf *r_md; 172 caddr_t r_dpos; 173 struct nfsmount *r_nmp; 174 struct vnode *r_vp; 175 u_int32_t r_xid; 176 int r_flags; /* flags on request, see below */ 177 int r_retry; /* max retransmission count */ 178 int r_rexmit; /* current retrans count */ 179 int r_timer; /* tick counter on reply */ 180 u_int32_t r_procnum; /* NFS procedure number */ 181 int r_rtt; /* RTT for rpc */ 182 int r_lastmsg; /* last tprintf */ 183 struct thread *r_td; /* Proc that did I/O system call */ 184 struct mtx r_mtx; /* Protects nfsreq fields */ 185 }; 186 187 /* 188 * Queue head for nfsreq's 189 */ 190 extern TAILQ_HEAD(nfs_reqq, nfsreq) nfs_reqq; 191 192 /* Flag values for r_flags */ 193 #define R_TIMING 0x01 /* timing request (in mntp) */ 194 #define R_SENT 0x02 /* request has been sent */ 195 #define R_SOFTTERM 0x04 /* soft mnt, too many retries */ 196 #define R_RESENDERR 0x08 /* Resend failed */ 197 #define R_SOCKERR 0x10 /* Fatal error on socket */ 198 #define R_TPRINTFMSG 0x20 /* Did a tprintf msg. */ 199 #define R_MUSTRESEND 0x40 /* Must resend request */ 200 #define R_GETONEREP 0x80 /* Probe for one reply only */ 201 #define R_REXMIT_INPROG 0x100 /* Re-transmit in progress */ 202 203 /* 204 * Pointers to ops that differ from v3 to v4 205 */ 206 struct nfs_rpcops { 207 int (*nr_readrpc)(struct vnode *vp, struct uio *uiop, struct ucred *cred); 208 int (*nr_writerpc)(struct vnode *vp, struct uio *uiop, struct ucred *cred, 209 int *iomode, int *must_commit); 210 int (*nr_writebp)(struct buf *bp, int force, struct thread *td); 211 int (*nr_readlinkrpc)(struct vnode *vp, struct uio *uiop, struct ucred *cred); 212 void (*nr_invaldir)(struct vnode *vp); 213 int (*nr_commit)(struct vnode *vp, u_quad_t offset, int cnt, 214 struct ucred *cred, struct thread *td); 215 }; 216 217 /* 218 * Defines for WebNFS 219 */ 220 221 #define WEBNFS_ESC_CHAR '%' 222 #define WEBNFS_SPECCHAR_START 0x80 223 224 #define WEBNFS_NATIVE_CHAR 0x80 225 /* 226 * .. 227 * Possibly more here in the future. 228 */ 229 230 /* 231 * Macro for converting escape characters in WebNFS pathnames. 232 * Should really be in libkern. 233 */ 234 235 #define HEXTOC(c) \ 236 ((c) >= 'a' ? ((c) - ('a' - 10)) : \ 237 ((c) >= 'A' ? ((c) - ('A' - 10)) : ((c) - '0'))) 238 #define HEXSTRTOI(p) \ 239 ((HEXTOC(p[0]) << 4) + HEXTOC(p[1])) 240 241 /* nfs_sigintr() helper, when 'rep' has all we need */ 242 #define NFS_SIGREP(rep) nfs_sigintr((rep)->r_nmp, (rep), (rep)->r_td) 243 244 #ifdef NFS_DEBUG 245 246 extern int nfs_debug; 247 #define NFS_DEBUG_ASYNCIO 1 /* asynchronous i/o */ 248 #define NFS_DEBUG_WG 2 /* server write gathering */ 249 #define NFS_DEBUG_RC 4 /* server request caching */ 250 251 #define NFS_DPF(cat, args) \ 252 do { \ 253 if (nfs_debug & NFS_DEBUG_##cat) printf args; \ 254 } while (0) 255 256 #else 257 258 #define NFS_DPF(cat, args) 259 260 #endif 261 262 /* 263 * On fast networks, the estimator will try to reduce the 264 * timeout lower than the latency of the server's disks, 265 * which results in too many timeouts, so cap the lower 266 * bound. 267 */ 268 #define NFS_MINRTO (NFS_HZ >> 2) 269 270 /* 271 * Keep the RTO from increasing to unreasonably large values 272 * when a server is not responding. 273 */ 274 #define NFS_MAXRTO (20 * NFS_HZ) 275 276 enum nfs_rto_timer_t { 277 NFS_DEFAULT_TIMER, 278 NFS_GETATTR_TIMER, 279 NFS_LOOKUP_TIMER, 280 NFS_READ_TIMER, 281 NFS_WRITE_TIMER, 282 }; 283 #define NFS_MAX_TIMER (NFS_WRITE_TIMER) 284 285 #define NFS_INITRTT (NFS_HZ << 3) 286 287 vfs_init_t nfs_init; 288 vfs_uninit_t nfs_uninit; 289 int nfs_mountroot(struct mount *mp, struct thread *td); 290 291 #ifndef NFS4_USE_RPCCLNT 292 int nfs_send(struct socket *, struct sockaddr *, struct mbuf *, 293 struct nfsreq *); 294 int nfs_sndlock(struct nfsreq *); 295 void nfs_sndunlock(struct nfsreq *); 296 #endif /* ! NFS4_USE_RPCCLNT */ 297 298 int nfs_vinvalbuf(struct vnode *, int, struct thread *, int); 299 int nfs_readrpc(struct vnode *, struct uio *, struct ucred *); 300 int nfs_writerpc(struct vnode *, struct uio *, struct ucred *, int *, 301 int *); 302 int nfs_commit(struct vnode *vp, u_quad_t offset, int cnt, 303 struct ucred *cred, struct thread *td); 304 int nfs_readdirrpc(struct vnode *, struct uio *, struct ucred *); 305 int nfs_nfsiodnew(void); 306 int nfs_asyncio(struct nfsmount *, struct buf *, struct ucred *, struct thread *); 307 int nfs_doio(struct vnode *, struct buf *, struct ucred *, struct thread *); 308 void nfs_doio_directwrite (struct buf *); 309 void nfs_up(struct nfsreq *, struct nfsmount *, struct thread *, 310 const char *, int); 311 void nfs_down(struct nfsreq *, struct nfsmount *, struct thread *, 312 const char *, int, int); 313 int nfs_readlinkrpc(struct vnode *, struct uio *, struct ucred *); 314 int nfs_sigintr(struct nfsmount *, struct nfsreq *, struct thread *); 315 int nfs_readdirplusrpc(struct vnode *, struct uio *, struct ucred *); 316 int nfs_request(struct vnode *, struct mbuf *, int, struct thread *, 317 struct ucred *, struct mbuf **, struct mbuf **, caddr_t *); 318 int nfs_loadattrcache(struct vnode **, struct mbuf **, caddr_t *, 319 struct vattr *, int); 320 int nfsm_mbuftouio(struct mbuf **, struct uio *, int, caddr_t *); 321 void nfs_nhinit(void); 322 void nfs_nhuninit(void); 323 int nfs_nmcancelreqs(struct nfsmount *); 324 void nfs_timer(void*); 325 326 int nfs_connect(struct nfsmount *, struct nfsreq *); 327 void nfs_disconnect(struct nfsmount *); 328 void nfs_safedisconnect(struct nfsmount *); 329 int nfs_getattrcache(struct vnode *, struct vattr *); 330 int nfsm_strtmbuf(struct mbuf **, char **, const char *, long); 331 int nfs_bioread(struct vnode *, struct uio *, int, struct ucred *); 332 int nfsm_uiotombuf(struct uio *, struct mbuf **, int, caddr_t *); 333 void nfs_clearcommit(struct mount *); 334 int nfs_writebp(struct buf *, int, struct thread *); 335 int nfs_fsinfo(struct nfsmount *, struct vnode *, struct ucred *, 336 struct thread *); 337 int nfs_meta_setsize (struct vnode *, struct ucred *, 338 struct thread *, u_quad_t); 339 340 void nfs_set_sigmask __P((struct thread *td, sigset_t *oldset)); 341 void nfs_restore_sigmask __P((struct thread *td, sigset_t *set)); 342 int nfs_msleep __P((struct thread *td, void *ident, struct mtx *mtx, int priority, 343 char *wmesg, int timo)); 344 345 #endif /* _KERNEL */ 346 347 #endif 348