1 /* $OpenBSD: nfs_vfsops.c,v 1.41 2001/12/11 09:32:46 art Exp $ */ 2 /* $NetBSD: nfs_vfsops.c,v 1.46.4.1 1996/05/25 22:40:35 fvdl Exp $ */ 3 4 /* 5 * Copyright (c) 1989, 1993, 1995 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * Rick Macklem at The University of Guelph. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 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. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the University of 22 * California, Berkeley and its contributors. 23 * 4. Neither the name of the University nor the names of its contributors 24 * may be used to endorse or promote products derived from this software 25 * without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 37 * SUCH DAMAGE. 38 * 39 * @(#)nfs_vfsops.c 8.12 (Berkeley) 5/20/95 40 */ 41 42 #include <sys/param.h> 43 #include <sys/conf.h> 44 #include <sys/ioctl.h> 45 #include <sys/signal.h> 46 #include <sys/proc.h> 47 #include <sys/namei.h> 48 #include <sys/vnode.h> 49 #include <sys/kernel.h> 50 #include <sys/mount.h> 51 #include <sys/buf.h> 52 #include <sys/mbuf.h> 53 #include <sys/socket.h> 54 #include <sys/socketvar.h> 55 #include <sys/systm.h> 56 #include <sys/sysctl.h> 57 58 #include <net/if.h> 59 #include <net/route.h> 60 #include <netinet/in.h> 61 62 #include <nfs/rpcv2.h> 63 #include <nfs/nfsproto.h> 64 #include <nfs/nfsnode.h> 65 #include <nfs/nfs.h> 66 #include <nfs/nfsmount.h> 67 #include <nfs/xdr_subs.h> 68 #include <nfs/nfsm_subs.h> 69 #include <nfs/nfsdiskless.h> 70 #include <nfs/nfs_var.h> 71 72 #define NQ_DEADTHRESH NQ_NEVERDEAD /* Default nm_deadthresh */ 73 #define NQ_NEVERDEAD 9 /* Greater than max. nm_timeouts */ 74 75 extern struct nfsstats nfsstats; 76 extern int nfs_ticks; 77 78 int nfs_sysctl 79 __P((int *, u_int, void *, size_t *, void *, size_t, struct proc *)); 80 int nfs_checkexp 81 __P((struct mount *mp, struct mbuf *nam, 82 int *extflagsp, struct ucred **credanonp)); 83 84 /* 85 * nfs vfs operations. 86 */ 87 struct vfsops nfs_vfsops = { 88 nfs_mount, 89 nfs_start, 90 nfs_unmount, 91 nfs_root, 92 nfs_quotactl, 93 nfs_statfs, 94 nfs_sync, 95 nfs_vget, 96 nfs_fhtovp, 97 nfs_vptofh, 98 nfs_vfs_init, 99 nfs_sysctl, 100 nfs_checkexp 101 }; 102 103 extern u_int32_t nfs_procids[NFS_NPROCS]; 104 extern u_int32_t nfs_prog, nfs_vers; 105 106 struct mount *nfs_mount_diskless 107 __P((struct nfs_dlmount *, char *, int)); 108 109 #define TRUE 1 110 #define FALSE 0 111 112 /* 113 * nfs statfs call 114 */ 115 int 116 nfs_statfs(mp, sbp, p) 117 struct mount *mp; 118 register struct statfs *sbp; 119 struct proc *p; 120 { 121 register struct vnode *vp; 122 register struct nfs_statfs *sfp = NULL; 123 register caddr_t cp; 124 register u_int32_t *tl; 125 register int32_t t1, t2; 126 caddr_t bpos, dpos, cp2; 127 struct nfsmount *nmp = VFSTONFS(mp); 128 int error = 0, v3 = (nmp->nm_flag & NFSMNT_NFSV3), retattr; 129 struct mbuf *mreq, *mrep = NULL, *md, *mb, *mb2; 130 struct ucred *cred; 131 struct nfsnode *np; 132 u_quad_t tquad; 133 134 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np); 135 if (error) 136 return (error); 137 vp = NFSTOV(np); 138 cred = crget(); 139 cred->cr_ngroups = 0; 140 if (v3 && (nmp->nm_flag & NFSMNT_GOTFSINFO) == 0) 141 (void)nfs_fsinfo(nmp, vp, cred, p); 142 nfsstats.rpccnt[NFSPROC_FSSTAT]++; 143 nfsm_reqhead(vp, NFSPROC_FSSTAT, NFSX_FH(v3)); 144 nfsm_fhtom(vp, v3); 145 nfsm_request(vp, NFSPROC_FSSTAT, p, cred); 146 if (v3) 147 nfsm_postop_attr(vp, retattr); 148 if (error) { 149 if (mrep != NULL) 150 m_free(mrep); 151 goto nfsmout; 152 } 153 nfsm_dissect(sfp, struct nfs_statfs *, NFSX_STATFS(v3)); 154 sbp->f_flags = nmp->nm_flag; 155 sbp->f_iosize = min(nmp->nm_rsize, nmp->nm_wsize); 156 if (v3) { 157 sbp->f_bsize = NFS_FABLKSIZE; 158 tquad = fxdr_hyper(&sfp->sf_tbytes); 159 sbp->f_blocks = (u_int32_t)(tquad / (u_quad_t)NFS_FABLKSIZE); 160 tquad = fxdr_hyper(&sfp->sf_fbytes); 161 sbp->f_bfree = (u_int32_t)(tquad / (u_quad_t)NFS_FABLKSIZE); 162 tquad = fxdr_hyper(&sfp->sf_abytes); 163 sbp->f_bavail = (int32_t)((quad_t)tquad / (quad_t)NFS_FABLKSIZE); 164 sbp->f_files = (fxdr_unsigned(int32_t, 165 sfp->sf_tfiles.nfsuquad[1]) & 0x7fffffff); 166 sbp->f_ffree = (fxdr_unsigned(int32_t, 167 sfp->sf_ffiles.nfsuquad[1]) & 0x7fffffff); 168 } else { 169 sbp->f_bsize = fxdr_unsigned(int32_t, sfp->sf_bsize); 170 sbp->f_blocks = fxdr_unsigned(int32_t, sfp->sf_blocks); 171 sbp->f_bfree = fxdr_unsigned(int32_t, sfp->sf_bfree); 172 sbp->f_bavail = fxdr_unsigned(int32_t, sfp->sf_bavail); 173 sbp->f_files = 0; 174 sbp->f_ffree = 0; 175 } 176 if (sbp != &mp->mnt_stat) { 177 bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN); 178 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); 179 bcopy(&mp->mnt_stat.mount_info.nfs_args, 180 &sbp->mount_info.nfs_args, sizeof(struct nfs_args)); 181 } 182 strncpy(&sbp->f_fstypename[0], mp->mnt_vfc->vfc_name, MFSNAMELEN); 183 nfsm_reqdone; 184 vrele(vp); 185 crfree(cred); 186 return (error); 187 } 188 189 /* 190 * nfs version 3 fsinfo rpc call 191 */ 192 int 193 nfs_fsinfo(nmp, vp, cred, p) 194 register struct nfsmount *nmp; 195 register struct vnode *vp; 196 struct ucred *cred; 197 struct proc *p; 198 { 199 register struct nfsv3_fsinfo *fsp; 200 register caddr_t cp; 201 register int32_t t1, t2; 202 register u_int32_t *tl, pref, max; 203 caddr_t bpos, dpos, cp2; 204 int error = 0, retattr; 205 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 206 207 nfsstats.rpccnt[NFSPROC_FSINFO]++; 208 nfsm_reqhead(vp, NFSPROC_FSINFO, NFSX_FH(1)); 209 nfsm_fhtom(vp, 1); 210 nfsm_request(vp, NFSPROC_FSINFO, p, cred); 211 nfsm_postop_attr(vp, retattr); 212 if (!error) { 213 nfsm_dissect(fsp, struct nfsv3_fsinfo *, NFSX_V3FSINFO); 214 pref = fxdr_unsigned(u_int32_t, fsp->fs_wtpref); 215 if (pref < nmp->nm_wsize) 216 nmp->nm_wsize = (pref + NFS_FABLKSIZE - 1) & 217 ~(NFS_FABLKSIZE - 1); 218 max = fxdr_unsigned(u_int32_t, fsp->fs_wtmax); 219 if (max < nmp->nm_wsize) { 220 nmp->nm_wsize = max & ~(NFS_FABLKSIZE - 1); 221 if (nmp->nm_wsize == 0) 222 nmp->nm_wsize = max; 223 } 224 pref = fxdr_unsigned(u_int32_t, fsp->fs_rtpref); 225 if (pref < nmp->nm_rsize) 226 nmp->nm_rsize = (pref + NFS_FABLKSIZE - 1) & 227 ~(NFS_FABLKSIZE - 1); 228 max = fxdr_unsigned(u_int32_t, fsp->fs_rtmax); 229 if (max < nmp->nm_rsize) { 230 nmp->nm_rsize = max & ~(NFS_FABLKSIZE - 1); 231 if (nmp->nm_rsize == 0) 232 nmp->nm_rsize = max; 233 } 234 pref = fxdr_unsigned(u_int32_t, fsp->fs_dtpref); 235 if (pref < nmp->nm_readdirsize) 236 nmp->nm_readdirsize = (pref + NFS_DIRBLKSIZ - 1) & 237 ~(NFS_DIRBLKSIZ - 1); 238 if (max < nmp->nm_readdirsize) { 239 nmp->nm_readdirsize = max & ~(NFS_DIRBLKSIZ - 1); 240 if (nmp->nm_readdirsize == 0) 241 nmp->nm_readdirsize = max; 242 } 243 nmp->nm_flag |= NFSMNT_GOTFSINFO; 244 } 245 nfsm_reqdone; 246 return (error); 247 } 248 249 /* 250 * Mount a remote root fs via. NFS. It goes like this: 251 * - Call nfs_boot_init() to fill in the nfs_diskless struct 252 * (using RARP, bootparam RPC, mountd RPC) 253 * - hand craft the swap nfs vnode hanging off a fake mount point 254 * if swdevt[0].sw_dev == NODEV 255 * - build the rootfs mount point and call mountnfs() to do the rest. 256 */ 257 int 258 nfs_mountroot() 259 { 260 struct nfs_diskless nd; 261 struct vattr attr; 262 struct mount *mp; 263 struct vnode *vp; 264 struct proc *procp; 265 long n; 266 int error; 267 268 procp = curproc; /* XXX */ 269 270 /* 271 * XXX time must be non-zero when we init the interface or else 272 * the arp code will wedge. [Fixed now in if_ether.c] 273 * However, the NFS attribute cache gives false "hits" when 274 * time.tv_sec < NFS_ATTRTIMEO(np) so keep this in for now. 275 */ 276 if (time.tv_sec < NFS_MAXATTRTIMO) 277 time.tv_sec = NFS_MAXATTRTIMO; 278 279 /* 280 * Call nfs_boot_init() to fill in the nfs_diskless struct. 281 * Side effect: Finds and configures a network interface. 282 */ 283 bzero((caddr_t) &nd, sizeof(nd)); 284 nfs_boot_init(&nd, procp); 285 286 /* 287 * Create the root mount point. 288 */ 289 if (nfs_boot_getfh(&nd.nd_boot, "root", &nd.nd_root, -1)) 290 panic("nfs_mountroot: root"); 291 mp = nfs_mount_diskless(&nd.nd_root, "/", 0); 292 nfs_root(mp, &rootvp); 293 printf("root on %s\n", nd.nd_root.ndm_host); 294 295 /* 296 * Link it into the mount list. 297 */ 298 simple_lock(&mountlist_slock); 299 CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list); 300 simple_unlock(&mountlist_slock); 301 vfs_unbusy(mp, procp); 302 303 /* Get root attributes (for the time). */ 304 error = VOP_GETATTR(rootvp, &attr, procp->p_ucred, procp); 305 if (error) panic("nfs_mountroot: getattr for root"); 306 n = attr.va_mtime.tv_sec; 307 #ifdef DEBUG 308 printf("root time: 0x%lx\n", n); 309 #endif 310 inittodr(n); 311 312 /* 313 * XXX splnet, so networks will receive... 314 */ 315 splnet(); 316 317 #ifdef notyet 318 /* Set up swap credentials. */ 319 proc0.p_ucred->cr_uid = ntohl(nd.swap_ucred.cr_uid); 320 proc0.p_ucred->cr_gid = ntohl(nd.swap_ucred.cr_gid); 321 if ((proc0.p_ucred->cr_ngroups = ntohs(nd.swap_ucred.cr_ngroups)) > 322 NGROUPS) 323 proc0.p_ucred->cr_ngroups = NGROUPS; 324 for (i = 0; i < proc0.p_ucred->cr_ngroups; i++) 325 proc0.p_ucred->cr_groups[i] = ntohl(nd.swap_ucred.cr_groups[i]); 326 #endif 327 328 /* 329 * "Mount" the swap device. 330 * 331 * On a "dataless" configuration (swap on disk) we will have: 332 * (swdevt[0].sw_dev != NODEV) identifying the swap device. 333 */ 334 if (bdevvp(swapdev, &swapdev_vp)) 335 panic("nfs_mountroot: can't setup swap vp"); 336 if (swdevt[0].sw_dev != NODEV) { 337 printf("swap on device 0x%x\n", swdevt[0].sw_dev); 338 return (0); 339 } 340 341 /* 342 * If swapping to an nfs node: (swdevt[0].sw_dev == NODEV) 343 * Create a fake mount point just for the swap vnode so that the 344 * swap file can be on a different server from the rootfs. 345 * 346 * Wait 5 retries, finally no swap is cool. -mickey 347 */ 348 error = nfs_boot_getfh(&nd.nd_boot, "swap", &nd.nd_swap, 5); 349 if (!error) { 350 mp = nfs_mount_diskless(&nd.nd_swap, "/swap", 0); 351 nfs_root(mp, &vp); 352 vfs_unbusy(mp, procp); 353 354 /* 355 * Since the swap file is not the root dir of a file system, 356 * hack it to a regular file. 357 */ 358 vp->v_type = VREG; 359 vp->v_flag = 0; 360 361 /* 362 * Next line is a hack to make swapmount() work on NFS swap files. 363 * XXX-smurph 364 */ 365 swdevt[0].sw_dev = NETDEV; 366 /* end hack */ 367 swdevt[0].sw_vp = vp; 368 369 /* 370 * Find out how large the swap file is. 371 */ 372 error = VOP_GETATTR(vp, &attr, procp->p_ucred, procp); 373 if (error) 374 printf("nfs_mountroot: getattr for swap\n"); 375 n = (long) (attr.va_size >> DEV_BSHIFT); 376 377 printf("swap on %s\n", nd.nd_swap.ndm_host); 378 #ifdef DEBUG 379 printf("swap size: 0x%lx (blocks)\n", n); 380 #endif 381 swdevt[0].sw_nblks = n; 382 return (0); 383 } 384 385 printf("WARNING: no swap\n"); 386 swdevt[0].sw_dev = NODEV; 387 swdevt[0].sw_vp = NULL; 388 swdevt[0].sw_nblks = 0; 389 390 return (0); 391 } 392 393 /* 394 * Internal version of mount system call for diskless setup. 395 */ 396 struct mount * 397 nfs_mount_diskless(ndmntp, mntname, mntflag) 398 struct nfs_dlmount *ndmntp; 399 char *mntname; 400 int mntflag; 401 { 402 struct nfs_args args; 403 struct mount *mp; 404 struct mbuf *m; 405 int error; 406 407 if (vfs_rootmountalloc("nfs", mntname, &mp)) 408 panic("nfs_mount_diskless: vfs_rootmountalloc failed"); 409 mp->mnt_flag |= mntflag; 410 411 /* Initialize mount args. */ 412 bzero((caddr_t) &args, sizeof(args)); 413 args.addr = (struct sockaddr *)&ndmntp->ndm_saddr; 414 args.addrlen = args.addr->sa_len; 415 args.sotype = SOCK_DGRAM; 416 args.fh = ndmntp->ndm_fh; 417 args.fhsize = NFSX_V2FH; 418 args.hostname = ndmntp->ndm_host; 419 420 #ifdef NFS_BOOT_OPTIONS 421 args.flags |= NFS_BOOT_OPTIONS; 422 #endif 423 #ifdef NFS_BOOT_RWSIZE 424 /* 425 * Reduce rsize,wsize for interfaces that consistently 426 * drop fragments of long UDP messages. (i.e. wd8003). 427 * You can always change these later via remount. 428 */ 429 args.flags |= NFSMNT_WSIZE | NFSMNT_RSIZE; 430 args.wsize = NFS_BOOT_RWSIZE; 431 args.rsize = NFS_BOOT_RWSIZE; 432 #endif 433 434 /* Get mbuf for server sockaddr. */ 435 m = m_get(M_WAIT, MT_SONAME); 436 bcopy((caddr_t)args.addr, mtod(m, caddr_t), 437 (m->m_len = args.addr->sa_len)); 438 439 error = mountnfs(&args, mp, m, mntname, args.hostname); 440 if (error) 441 panic("nfs_mountroot: mount %s failed: %d", mntname, error); 442 443 return (mp); 444 } 445 446 void 447 nfs_decode_args(nmp, argp, nargp) 448 struct nfsmount *nmp; 449 struct nfs_args *argp; 450 struct nfs_args *nargp; 451 { 452 int s; 453 int adjsock = 0; 454 int maxio; 455 456 s = splsoftnet(); 457 458 #if 0 459 /* Re-bind if rsrvd port requested and wasn't on one */ 460 adjsock = !(nmp->nm_flag & NFSMNT_RESVPORT) 461 && (argp->flags & NFSMNT_RESVPORT); 462 #endif 463 /* Also re-bind if we're switching to/from a connected UDP socket */ 464 adjsock |= ((nmp->nm_flag & NFSMNT_NOCONN) != 465 (argp->flags & NFSMNT_NOCONN)); 466 467 /* Update flags atomically. Don't change the lock bits. */ 468 nmp->nm_flag = 469 (argp->flags & ~NFSMNT_INTERNAL) | (nmp->nm_flag & NFSMNT_INTERNAL); 470 splx(s); 471 472 if ((argp->flags & NFSMNT_TIMEO) && argp->timeo > 0) { 473 nmp->nm_timeo = (argp->timeo * NFS_HZ + 5) / 10; 474 if (nmp->nm_timeo < NFS_MINTIMEO) 475 nmp->nm_timeo = NFS_MINTIMEO; 476 else if (nmp->nm_timeo > NFS_MAXTIMEO) 477 nmp->nm_timeo = NFS_MAXTIMEO; 478 } 479 480 if ((argp->flags & NFSMNT_RETRANS) && argp->retrans > 1) { 481 nmp->nm_retry = argp->retrans; 482 if (nmp->nm_retry > NFS_MAXREXMIT) 483 nmp->nm_retry = NFS_MAXREXMIT; 484 } 485 486 if (argp->flags & NFSMNT_NFSV3) { 487 if (argp->sotype == SOCK_DGRAM) 488 maxio = NFS_MAXDGRAMDATA; 489 else 490 maxio = NFS_MAXDATA; 491 } else 492 maxio = NFS_V2MAXDATA; 493 494 if ((argp->flags & NFSMNT_WSIZE) && argp->wsize > 0) { 495 int osize = nmp->nm_wsize; 496 nmp->nm_wsize = argp->wsize; 497 /* Round down to multiple of blocksize */ 498 nmp->nm_wsize &= ~(NFS_FABLKSIZE - 1); 499 if (nmp->nm_wsize <= 0) 500 nmp->nm_wsize = NFS_FABLKSIZE; 501 adjsock |= (nmp->nm_wsize != osize); 502 } 503 if (nmp->nm_wsize > maxio) 504 nmp->nm_wsize = maxio; 505 if (nmp->nm_wsize > MAXBSIZE) 506 nmp->nm_wsize = MAXBSIZE; 507 508 if ((argp->flags & NFSMNT_RSIZE) && argp->rsize > 0) { 509 int osize = nmp->nm_rsize; 510 nmp->nm_rsize = argp->rsize; 511 /* Round down to multiple of blocksize */ 512 nmp->nm_rsize &= ~(NFS_FABLKSIZE - 1); 513 if (nmp->nm_rsize <= 0) 514 nmp->nm_rsize = NFS_FABLKSIZE; 515 adjsock |= (nmp->nm_rsize != osize); 516 } 517 if (nmp->nm_rsize > maxio) 518 nmp->nm_rsize = maxio; 519 if (nmp->nm_rsize > MAXBSIZE) 520 nmp->nm_rsize = MAXBSIZE; 521 522 if ((argp->flags & NFSMNT_READDIRSIZE) && argp->readdirsize > 0) { 523 nmp->nm_readdirsize = argp->readdirsize; 524 /* Round down to multiple of blocksize */ 525 nmp->nm_readdirsize &= ~(NFS_DIRBLKSIZ - 1); 526 if (nmp->nm_readdirsize < NFS_DIRBLKSIZ) 527 nmp->nm_readdirsize = NFS_DIRBLKSIZ; 528 } else if (argp->flags & NFSMNT_RSIZE) 529 nmp->nm_readdirsize = nmp->nm_rsize; 530 531 if (nmp->nm_readdirsize > maxio) 532 nmp->nm_readdirsize = maxio; 533 534 if ((argp->flags & NFSMNT_MAXGRPS) && argp->maxgrouplist >= 0 && 535 argp->maxgrouplist <= NFS_MAXGRPS) 536 nmp->nm_numgrps = argp->maxgrouplist; 537 if ((argp->flags & NFSMNT_READAHEAD) && argp->readahead >= 0 && 538 argp->readahead <= NFS_MAXRAHEAD) 539 nmp->nm_readahead = argp->readahead; 540 if ((argp->flags & NFSMNT_DEADTHRESH) && argp->deadthresh >= 1 && 541 argp->deadthresh <= NQ_NEVERDEAD) 542 nmp->nm_deadthresh = argp->deadthresh; 543 if (argp->flags & NFSMNT_ACREGMIN && argp->acregmin >= 0) { 544 if (argp->acregmin > 0xffff) 545 nmp->nm_acregmin = 0xffff; 546 else 547 nmp->nm_acregmin = argp->acregmin; 548 } 549 if (argp->flags & NFSMNT_ACREGMAX && argp->acregmax >= 0) { 550 if (argp->acregmax > 0xffff) 551 nmp->nm_acregmax = 0xffff; 552 else 553 nmp->nm_acregmax = argp->acregmax; 554 } 555 if (nmp->nm_acregmin > nmp->nm_acregmax) 556 nmp->nm_acregmin = nmp->nm_acregmax; 557 558 if (argp->flags & NFSMNT_ACDIRMIN && argp->acdirmin >= 0) { 559 if (argp->acdirmin > 0xffff) 560 nmp->nm_acdirmin = 0xffff; 561 else 562 nmp->nm_acdirmin = argp->acdirmin; 563 } 564 if (argp->flags & NFSMNT_ACDIRMAX && argp->acdirmax >= 0) { 565 if (argp->acdirmax > 0xffff) 566 nmp->nm_acdirmax = 0xffff; 567 else 568 nmp->nm_acdirmax = argp->acdirmax; 569 } 570 if (nmp->nm_acdirmin > nmp->nm_acdirmax) 571 nmp->nm_acdirmin = nmp->nm_acdirmax; 572 573 if (nmp->nm_so && adjsock) { 574 nfs_disconnect(nmp); 575 if (nmp->nm_sotype == SOCK_DGRAM) 576 while (nfs_connect(nmp, (struct nfsreq *)0)) { 577 printf("nfs_args: retrying connect\n"); 578 (void) tsleep((caddr_t)&lbolt, 579 PSOCK, "nfscon", 0); 580 } 581 } 582 583 /* Update nargp based on nmp */ 584 nargp->wsize = nmp->nm_wsize; 585 nargp->rsize = nmp->nm_rsize; 586 nargp->readdirsize = nmp->nm_readdirsize; 587 nargp->timeo = nmp->nm_timeo; 588 nargp->retrans = nmp->nm_retry; 589 nargp->maxgrouplist = nmp->nm_numgrps; 590 nargp->readahead = nmp->nm_readahead; 591 nargp->deadthresh = nmp->nm_deadthresh; 592 nargp->acregmin = nmp->nm_acregmin; 593 nargp->acregmax = nmp->nm_acregmax; 594 nargp->acdirmin = nmp->nm_acdirmin; 595 nargp->acdirmax = nmp->nm_acdirmax; 596 } 597 598 /* 599 * VFS Operations. 600 * 601 * mount system call 602 * It seems a bit dumb to copyinstr() the host and path here and then 603 * bcopy() them in mountnfs(), but I wanted to detect errors before 604 * doing the sockargs() call because sockargs() allocates an mbuf and 605 * an error after that means that I have to release the mbuf. 606 */ 607 /* ARGSUSED */ 608 int 609 nfs_mount(mp, path, data, ndp, p) 610 struct mount *mp; 611 const char *path; 612 void *data; 613 struct nameidata *ndp; 614 struct proc *p; 615 { 616 int error; 617 struct nfs_args args; 618 struct mbuf *nam; 619 char pth[MNAMELEN], hst[MNAMELEN]; 620 size_t len; 621 u_char nfh[NFSX_V3FHMAX]; 622 623 error = copyin (data, &args, sizeof (args.version)); 624 if (error) 625 return (error); 626 if (args.version == 3) { 627 error = copyin (data, (caddr_t)&args, 628 sizeof (struct nfs_args3)); 629 args.flags &= ~(NFSMNT_INTERNAL|NFSMNT_NOAC); 630 } 631 else if (args.version == NFS_ARGSVERSION) { 632 error = copyin(data, (caddr_t)&args, sizeof (struct nfs_args)); 633 args.flags &= ~NFSMNT_NOAC; /* XXX - compatibility */ 634 } 635 else 636 return (EPROGMISMATCH); 637 if (error) 638 return (error); 639 640 if (nfs_niothreads < 0) { 641 nfs_niothreads = 4; 642 nfs_getset_niothreads(TRUE); 643 } 644 645 if (mp->mnt_flag & MNT_UPDATE) { 646 register struct nfsmount *nmp = VFSTONFS(mp); 647 648 if (nmp == NULL) 649 return (EIO); 650 /* 651 * When doing an update, we can't change from or to 652 * v3. 653 */ 654 args.flags = (args.flags & ~(NFSMNT_NFSV3)) | 655 (nmp->nm_flag & (NFSMNT_NFSV3)); 656 nfs_decode_args(nmp, &args, &mp->mnt_stat.mount_info.nfs_args); 657 return (0); 658 } 659 if (args.fhsize < 0 || args.fhsize > NFSX_V3FHMAX) 660 return (EINVAL); 661 error = copyin((caddr_t)args.fh, (caddr_t)nfh, args.fhsize); 662 if (error) 663 return (error); 664 error = copyinstr(path, pth, MNAMELEN-1, &len); 665 if (error) 666 return (error); 667 bzero(&pth[len], MNAMELEN - len); 668 error = copyinstr(args.hostname, hst, MNAMELEN-1, &len); 669 if (error) 670 return (error); 671 bzero(&hst[len], MNAMELEN - len); 672 /* sockargs() call must be after above copyin() calls */ 673 error = sockargs(&nam, (caddr_t)args.addr, args.addrlen, MT_SONAME); 674 if (error) 675 return (error); 676 args.fh = nfh; 677 error = mountnfs(&args, mp, nam, pth, hst); 678 return (error); 679 } 680 681 /* 682 * Common code for mount and mountroot 683 */ 684 int 685 mountnfs(argp, mp, nam, pth, hst) 686 register struct nfs_args *argp; 687 register struct mount *mp; 688 struct mbuf *nam; 689 char *pth, *hst; 690 { 691 register struct nfsmount *nmp; 692 int error; 693 694 if (mp->mnt_flag & MNT_UPDATE) { 695 nmp = VFSTONFS(mp); 696 /* update paths, file handles, etc, here XXX */ 697 m_freem(nam); 698 return (0); 699 } else { 700 MALLOC(nmp, struct nfsmount *, sizeof (struct nfsmount), 701 M_NFSMNT, M_WAITOK); 702 bzero((caddr_t)nmp, sizeof (struct nfsmount)); 703 mp->mnt_data = (qaddr_t)nmp; 704 TAILQ_INIT(&nmp->nm_uidlruhead); 705 } 706 707 vfs_getnewfsid(mp); 708 nmp->nm_mountp = mp; 709 nmp->nm_timeo = NFS_TIMEO; 710 nmp->nm_retry = NFS_RETRANS; 711 nmp->nm_wsize = NFS_WSIZE; 712 nmp->nm_rsize = NFS_RSIZE; 713 nmp->nm_readdirsize = NFS_READDIRSIZE; 714 nmp->nm_numgrps = NFS_MAXGRPS; 715 nmp->nm_readahead = NFS_DEFRAHEAD; 716 nmp->nm_deadthresh = NQ_DEADTHRESH; 717 CIRCLEQ_INIT(&nmp->nm_timerhead); 718 nmp->nm_inprog = NULLVP; 719 nmp->nm_fhsize = argp->fhsize; 720 nmp->nm_acregmin = NFS_MINATTRTIMO; 721 nmp->nm_acregmax = NFS_MAXATTRTIMO; 722 nmp->nm_acdirmin = NFS_MINATTRTIMO; 723 nmp->nm_acdirmax = NFS_MAXATTRTIMO; 724 bcopy((caddr_t)argp->fh, (caddr_t)nmp->nm_fh, argp->fhsize); 725 strncpy(&mp->mnt_stat.f_fstypename[0], mp->mnt_vfc->vfc_name, MFSNAMELEN); 726 bcopy(hst, mp->mnt_stat.f_mntfromname, MNAMELEN); 727 bcopy(pth, mp->mnt_stat.f_mntonname, MNAMELEN); 728 bcopy(argp, &mp->mnt_stat.mount_info.nfs_args, sizeof(*argp)); 729 nmp->nm_nam = nam; 730 nfs_decode_args(nmp, argp, &mp->mnt_stat.mount_info.nfs_args); 731 732 /* Set up the sockets and per-host congestion */ 733 nmp->nm_sotype = argp->sotype; 734 nmp->nm_soproto = argp->proto; 735 736 /* 737 * For Connection based sockets (TCP,...) defer the connect until 738 * the first request, in case the server is not responding. 739 */ 740 if (nmp->nm_sotype == SOCK_DGRAM && 741 (error = nfs_connect(nmp, (struct nfsreq *)0))) 742 goto bad; 743 744 /* 745 * This is silly, but it has to be set so that vinifod() works. 746 * We do not want to do an nfs_statfs() here since we can get 747 * stuck on a dead server and we are holding a lock on the mount 748 * point. 749 */ 750 mp->mnt_stat.f_iosize = NFS_MAXDGRAMDATA; 751 mp->mnt_fs_bshift = DEV_BSHIFT; 752 mp->mnt_dev_bshift = DEV_BSHIFT; 753 754 return (0); 755 bad: 756 nfs_disconnect(nmp); 757 free((caddr_t)nmp, M_NFSMNT); 758 m_freem(nam); 759 return (error); 760 } 761 762 /* 763 * unmount system call 764 */ 765 int 766 nfs_unmount(mp, mntflags, p) 767 struct mount *mp; 768 int mntflags; 769 struct proc *p; 770 { 771 register struct nfsmount *nmp; 772 int error, flags = 0; 773 774 if (mntflags & MNT_FORCE) 775 flags |= FORCECLOSE; 776 nmp = VFSTONFS(mp); 777 /* 778 * Goes something like this.. 779 * - Call vflush() to clear out vnodes for this file system, 780 * except for the root vnode. 781 * - Close the socket 782 * - Free up the data structures 783 */ 784 785 /* 786 * Must handshake with nqnfs_clientd() if it is active. 787 */ 788 nmp->nm_flag |= NFSMNT_DISMINPROG; 789 while (nmp->nm_inprog != NULLVP) 790 (void) tsleep((caddr_t)&lbolt, PSOCK, "nfsdism", 0); 791 error = vflush(mp, NULL, flags); 792 if (error) { 793 nmp->nm_flag &= ~NFSMNT_DISMINPROG; 794 return (error); 795 } 796 797 /* 798 * We are now committed to the unmount. 799 * For NQNFS, let the server daemon free the nfsmount structure. 800 */ 801 if (nmp->nm_flag & NFSMNT_KERB) 802 nmp->nm_flag |= NFSMNT_DISMNT; 803 804 nfs_disconnect(nmp); 805 m_freem(nmp->nm_nam); 806 807 if ((nmp->nm_flag & NFSMNT_KERB) == 0) 808 free((caddr_t)nmp, M_NFSMNT); 809 return (0); 810 } 811 812 /* 813 * Return root of a filesystem 814 */ 815 int 816 nfs_root(mp, vpp) 817 struct mount *mp; 818 struct vnode **vpp; 819 { 820 struct nfsmount *nmp; 821 struct nfsnode *np; 822 int error; 823 824 nmp = VFSTONFS(mp); 825 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np); 826 if (error) 827 return (error); 828 *vpp = NFSTOV(np); 829 return (0); 830 } 831 832 extern int syncprt; 833 834 /* 835 * Flush out the buffer cache 836 */ 837 /* ARGSUSED */ 838 int 839 nfs_sync(mp, waitfor, cred, p) 840 struct mount *mp; 841 int waitfor; 842 struct ucred *cred; 843 struct proc *p; 844 { 845 register struct vnode *vp; 846 int error, allerror = 0; 847 848 /* 849 * Force stale buffer cache information to be flushed. 850 */ 851 loop: 852 for (vp = mp->mnt_vnodelist.lh_first; 853 vp != NULL; 854 vp = vp->v_mntvnodes.le_next) { 855 /* 856 * If the vnode that we are about to sync is no longer 857 * associated with this mount point, start over. 858 */ 859 if (vp->v_mount != mp) 860 goto loop; 861 if (waitfor == MNT_LAZY || 862 (LIST_EMPTY(&vp->v_dirtyblkhd) && 863 vp->v_uobj.uo_npages == 0)) 864 continue; 865 if (vget(vp, LK_EXCLUSIVE, p)) 866 goto loop; 867 error = VOP_FSYNC(vp, cred, waitfor, p); 868 if (error) 869 allerror = error; 870 vput(vp); 871 } 872 return (allerror); 873 } 874 875 /* 876 * NFS flat namespace lookup. 877 * Currently unsupported. 878 */ 879 /* ARGSUSED */ 880 int 881 nfs_vget(mp, ino, vpp) 882 struct mount *mp; 883 ino_t ino; 884 struct vnode **vpp; 885 { 886 887 return (EOPNOTSUPP); 888 } 889 890 /* 891 * Do that sysctl thang... 892 */ 893 int 894 nfs_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, void *newp, 895 size_t newlen, struct proc *p) 896 { 897 int rv; 898 899 /* 900 * All names at this level are terminal. 901 */ 902 if(namelen > 1) 903 return ENOTDIR; /* overloaded */ 904 905 switch(name[0]) { 906 case NFS_NFSSTATS: 907 if(!oldp) { 908 *oldlenp = sizeof nfsstats; 909 return 0; 910 } 911 912 if(*oldlenp < sizeof nfsstats) { 913 *oldlenp = sizeof nfsstats; 914 return ENOMEM; 915 } 916 917 rv = copyout(&nfsstats, oldp, sizeof nfsstats); 918 if(rv) return rv; 919 920 if(newp && newlen != sizeof nfsstats) 921 return EINVAL; 922 923 if(newp) { 924 return copyin(newp, &nfsstats, sizeof nfsstats); 925 } 926 return 0; 927 928 case NFS_NIOTHREADS: 929 nfs_getset_niothreads(0); 930 931 rv = sysctl_int(oldp, oldlenp, newp, newlen, &nfs_niothreads); 932 if (newp) 933 nfs_getset_niothreads(1); 934 935 return rv; 936 937 default: 938 return EOPNOTSUPP; 939 } 940 } 941 942 943 /* 944 * At this point, this should never happen 945 */ 946 /* ARGSUSED */ 947 int 948 nfs_fhtovp(mp, fhp, vpp) 949 register struct mount *mp; 950 struct fid *fhp; 951 struct vnode **vpp; 952 { 953 954 return (EINVAL); 955 } 956 957 /* 958 * Vnode pointer to File handle, should never happen either 959 */ 960 /* ARGSUSED */ 961 int 962 nfs_vptofh(vp, fhp) 963 struct vnode *vp; 964 struct fid *fhp; 965 { 966 967 return (EINVAL); 968 } 969 970 /* 971 * Vfs start routine, a no-op. 972 */ 973 /* ARGSUSED */ 974 int 975 nfs_start(mp, flags, p) 976 struct mount *mp; 977 int flags; 978 struct proc *p; 979 { 980 981 return (0); 982 } 983 984 /* 985 * Do operations associated with quotas, not supported 986 */ 987 /* ARGSUSED */ 988 int 989 nfs_quotactl(mp, cmd, uid, arg, p) 990 struct mount *mp; 991 int cmd; 992 uid_t uid; 993 caddr_t arg; 994 struct proc *p; 995 { 996 997 return (EOPNOTSUPP); 998 } 999 1000 /* 1001 * check export permission, not supported 1002 */ 1003 /* ARGUSED */ 1004 int 1005 nfs_checkexp(mp, nam, exflagsp, credanonp) 1006 register struct mount *mp; 1007 struct mbuf *nam; 1008 int *exflagsp; 1009 struct ucred **credanonp; 1010 { 1011 return (EOPNOTSUPP); 1012 } 1013 1014