1 /* $OpenBSD: nfs_vfsops.c,v 1.51 2003/08/14 07:46:40 mickey 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. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * @(#)nfs_vfsops.c 8.12 (Berkeley) 5/20/95 36 */ 37 38 #include <sys/param.h> 39 #include <sys/conf.h> 40 #include <sys/ioctl.h> 41 #include <sys/signal.h> 42 #include <sys/proc.h> 43 #include <sys/namei.h> 44 #include <sys/vnode.h> 45 #include <sys/kernel.h> 46 #include <sys/mount.h> 47 #include <sys/buf.h> 48 #include <sys/mbuf.h> 49 #include <sys/socket.h> 50 #include <sys/socketvar.h> 51 #include <sys/systm.h> 52 #include <sys/sysctl.h> 53 54 #include <net/if.h> 55 #include <net/route.h> 56 #include <netinet/in.h> 57 58 #include <nfs/rpcv2.h> 59 #include <nfs/nfsproto.h> 60 #include <nfs/nfsnode.h> 61 #include <nfs/nfs.h> 62 #include <nfs/nfsmount.h> 63 #include <nfs/xdr_subs.h> 64 #include <nfs/nfsm_subs.h> 65 #include <nfs/nfsdiskless.h> 66 #include <nfs/nfs_var.h> 67 68 #define NQ_DEADTHRESH NQ_NEVERDEAD /* Default nm_deadthresh */ 69 #define NQ_NEVERDEAD 9 /* Greater than max. nm_timeouts */ 70 71 extern struct nfsstats nfsstats; 72 extern int nfs_ticks; 73 74 int nfs_sysctl(int *, u_int, void *, size_t *, void *, size_t, struct proc *); 75 int nfs_checkexp(struct mount *mp, struct mbuf *nam, 76 int *extflagsp, struct ucred **credanonp); 77 78 /* 79 * nfs vfs operations. 80 */ 81 const struct vfsops nfs_vfsops = { 82 nfs_mount, 83 nfs_start, 84 nfs_unmount, 85 nfs_root, 86 nfs_quotactl, 87 nfs_statfs, 88 nfs_sync, 89 nfs_vget, 90 nfs_fhtovp, 91 nfs_vptofh, 92 nfs_vfs_init, 93 nfs_sysctl, 94 nfs_checkexp 95 }; 96 97 extern u_int32_t nfs_procids[NFS_NPROCS]; 98 extern u_int32_t nfs_prog, nfs_vers; 99 100 struct mount *nfs_mount_diskless(struct nfs_dlmount *, char *, int); 101 102 #define TRUE 1 103 #define FALSE 0 104 105 /* 106 * nfs statfs call 107 */ 108 int 109 nfs_statfs(mp, sbp, p) 110 struct mount *mp; 111 struct statfs *sbp; 112 struct proc *p; 113 { 114 struct vnode *vp; 115 struct nfs_statfs *sfp = NULL; 116 caddr_t cp; 117 u_int32_t *tl; 118 int32_t t1, t2; 119 caddr_t bpos, dpos, cp2; 120 struct nfsmount *nmp = VFSTONFS(mp); 121 int error = 0, v3 = (nmp->nm_flag & NFSMNT_NFSV3), retattr; 122 struct mbuf *mreq, *mrep = NULL, *md, *mb, *mb2; 123 struct ucred *cred; 124 struct nfsnode *np; 125 u_quad_t tquad; 126 127 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np); 128 if (error) 129 return (error); 130 vp = NFSTOV(np); 131 cred = crget(); 132 cred->cr_ngroups = 0; 133 if (v3 && (nmp->nm_flag & NFSMNT_GOTFSINFO) == 0) 134 (void)nfs_fsinfo(nmp, vp, cred, p); 135 nfsstats.rpccnt[NFSPROC_FSSTAT]++; 136 nfsm_reqhead(vp, NFSPROC_FSSTAT, NFSX_FH(v3)); 137 nfsm_fhtom(vp, v3); 138 nfsm_request(vp, NFSPROC_FSSTAT, p, cred); 139 if (v3) 140 nfsm_postop_attr(vp, retattr); 141 if (error) { 142 if (mrep != NULL) 143 m_free(mrep); 144 goto nfsmout; 145 } 146 nfsm_dissect(sfp, struct nfs_statfs *, NFSX_STATFS(v3)); 147 sbp->f_flags = nmp->nm_flag; 148 sbp->f_iosize = min(nmp->nm_rsize, nmp->nm_wsize); 149 if (v3) { 150 sbp->f_bsize = NFS_FABLKSIZE; 151 tquad = fxdr_hyper(&sfp->sf_tbytes); 152 sbp->f_blocks = (u_int32_t)(tquad / (u_quad_t)NFS_FABLKSIZE); 153 tquad = fxdr_hyper(&sfp->sf_fbytes); 154 sbp->f_bfree = (u_int32_t)(tquad / (u_quad_t)NFS_FABLKSIZE); 155 tquad = fxdr_hyper(&sfp->sf_abytes); 156 sbp->f_bavail = (int32_t)((quad_t)tquad / (quad_t)NFS_FABLKSIZE); 157 sbp->f_files = (fxdr_unsigned(int32_t, 158 sfp->sf_tfiles.nfsuquad[1]) & 0x7fffffff); 159 sbp->f_ffree = (fxdr_unsigned(int32_t, 160 sfp->sf_ffiles.nfsuquad[1]) & 0x7fffffff); 161 } else { 162 sbp->f_bsize = fxdr_unsigned(int32_t, sfp->sf_bsize); 163 sbp->f_blocks = fxdr_unsigned(int32_t, sfp->sf_blocks); 164 sbp->f_bfree = fxdr_unsigned(int32_t, sfp->sf_bfree); 165 sbp->f_bavail = fxdr_unsigned(int32_t, sfp->sf_bavail); 166 sbp->f_files = 0; 167 sbp->f_ffree = 0; 168 } 169 if (sbp != &mp->mnt_stat) { 170 bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN); 171 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); 172 bcopy(&mp->mnt_stat.mount_info.nfs_args, 173 &sbp->mount_info.nfs_args, sizeof(struct nfs_args)); 174 } 175 strncpy(&sbp->f_fstypename[0], mp->mnt_vfc->vfc_name, MFSNAMELEN); 176 nfsm_reqdone; 177 vrele(vp); 178 crfree(cred); 179 return (error); 180 } 181 182 /* 183 * nfs version 3 fsinfo rpc call 184 */ 185 int 186 nfs_fsinfo(nmp, vp, cred, p) 187 struct nfsmount *nmp; 188 struct vnode *vp; 189 struct ucred *cred; 190 struct proc *p; 191 { 192 struct nfsv3_fsinfo *fsp; 193 caddr_t cp; 194 int32_t t1, t2; 195 u_int32_t *tl, pref, max; 196 caddr_t bpos, dpos, cp2; 197 int error = 0, retattr; 198 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 199 200 nfsstats.rpccnt[NFSPROC_FSINFO]++; 201 nfsm_reqhead(vp, NFSPROC_FSINFO, NFSX_FH(1)); 202 nfsm_fhtom(vp, 1); 203 nfsm_request(vp, NFSPROC_FSINFO, p, cred); 204 nfsm_postop_attr(vp, retattr); 205 if (!error) { 206 nfsm_dissect(fsp, struct nfsv3_fsinfo *, NFSX_V3FSINFO); 207 pref = fxdr_unsigned(u_int32_t, fsp->fs_wtpref); 208 if (pref < nmp->nm_wsize) 209 nmp->nm_wsize = (pref + NFS_FABLKSIZE - 1) & 210 ~(NFS_FABLKSIZE - 1); 211 max = fxdr_unsigned(u_int32_t, fsp->fs_wtmax); 212 if (max < nmp->nm_wsize) { 213 nmp->nm_wsize = max & ~(NFS_FABLKSIZE - 1); 214 if (nmp->nm_wsize == 0) 215 nmp->nm_wsize = max; 216 } 217 pref = fxdr_unsigned(u_int32_t, fsp->fs_rtpref); 218 if (pref < nmp->nm_rsize) 219 nmp->nm_rsize = (pref + NFS_FABLKSIZE - 1) & 220 ~(NFS_FABLKSIZE - 1); 221 max = fxdr_unsigned(u_int32_t, fsp->fs_rtmax); 222 if (max < nmp->nm_rsize) { 223 nmp->nm_rsize = max & ~(NFS_FABLKSIZE - 1); 224 if (nmp->nm_rsize == 0) 225 nmp->nm_rsize = max; 226 } 227 pref = fxdr_unsigned(u_int32_t, fsp->fs_dtpref); 228 if (pref < nmp->nm_readdirsize) 229 nmp->nm_readdirsize = (pref + NFS_DIRBLKSIZ - 1) & 230 ~(NFS_DIRBLKSIZ - 1); 231 if (max < nmp->nm_readdirsize) { 232 nmp->nm_readdirsize = max & ~(NFS_DIRBLKSIZ - 1); 233 if (nmp->nm_readdirsize == 0) 234 nmp->nm_readdirsize = max; 235 } 236 nmp->nm_flag |= NFSMNT_GOTFSINFO; 237 } 238 nfsm_reqdone; 239 return (error); 240 } 241 242 /* 243 * Mount a remote root fs via. NFS. It goes like this: 244 * - Call nfs_boot_init() to fill in the nfs_diskless struct 245 * (using RARP, bootparam RPC, mountd RPC) 246 * - hand craft the swap nfs vnode hanging off a fake mount point 247 * if swdevt[0].sw_dev == NODEV 248 * - build the rootfs mount point and call mountnfs() to do the rest. 249 */ 250 int 251 nfs_mountroot() 252 { 253 struct nfs_diskless nd; 254 struct vattr attr; 255 struct mount *mp; 256 struct vnode *vp; 257 struct proc *procp; 258 long n; 259 int error; 260 261 procp = curproc; /* XXX */ 262 263 /* 264 * XXX time must be non-zero when we init the interface or else 265 * the arp code will wedge. [Fixed now in if_ether.c] 266 * However, the NFS attribute cache gives false "hits" when 267 * time.tv_sec < NFS_ATTRTIMEO(np) so keep this in for now. 268 */ 269 if (time.tv_sec < NFS_MAXATTRTIMO) 270 time.tv_sec = NFS_MAXATTRTIMO; 271 272 /* 273 * Call nfs_boot_init() to fill in the nfs_diskless struct. 274 * Side effect: Finds and configures a network interface. 275 */ 276 bzero((caddr_t) &nd, sizeof(nd)); 277 nfs_boot_init(&nd, procp); 278 279 /* 280 * Create the root mount point. 281 */ 282 if (nfs_boot_getfh(&nd.nd_boot, "root", &nd.nd_root, -1)) 283 panic("nfs_mountroot: root"); 284 mp = nfs_mount_diskless(&nd.nd_root, "/", 0); 285 nfs_root(mp, &rootvp); 286 printf("root on %s\n", nd.nd_root.ndm_host); 287 288 /* 289 * Link it into the mount list. 290 */ 291 simple_lock(&mountlist_slock); 292 CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list); 293 simple_unlock(&mountlist_slock); 294 vfs_unbusy(mp, procp); 295 296 /* Get root attributes (for the time). */ 297 error = VOP_GETATTR(rootvp, &attr, procp->p_ucred, procp); 298 if (error) panic("nfs_mountroot: getattr for root"); 299 n = attr.va_atime.tv_sec; 300 #ifdef DEBUG 301 printf("root time: 0x%lx\n", n); 302 #endif 303 inittodr(n); 304 305 #ifdef notyet 306 /* Set up swap credentials. */ 307 proc0.p_ucred->cr_uid = ntohl(nd.swap_ucred.cr_uid); 308 proc0.p_ucred->cr_gid = ntohl(nd.swap_ucred.cr_gid); 309 if ((proc0.p_ucred->cr_ngroups = ntohs(nd.swap_ucred.cr_ngroups)) > 310 NGROUPS) 311 proc0.p_ucred->cr_ngroups = NGROUPS; 312 for (i = 0; i < proc0.p_ucred->cr_ngroups; i++) 313 proc0.p_ucred->cr_groups[i] = ntohl(nd.swap_ucred.cr_groups[i]); 314 #endif 315 316 /* 317 * "Mount" the swap device. 318 * 319 * On a "dataless" configuration (swap on disk) we will have: 320 * (swdevt[0].sw_dev != NODEV) identifying the swap device. 321 */ 322 if (bdevvp(swapdev, &swapdev_vp)) 323 panic("nfs_mountroot: can't setup swap vp"); 324 if (swdevt[0].sw_dev != NODEV) { 325 printf("swap on device 0x%x\n", swdevt[0].sw_dev); 326 return (0); 327 } 328 329 /* 330 * If swapping to an nfs node: (swdevt[0].sw_dev == NODEV) 331 * Create a fake mount point just for the swap vnode so that the 332 * swap file can be on a different server from the rootfs. 333 * 334 * Wait 5 retries, finally no swap is cool. -mickey 335 */ 336 error = nfs_boot_getfh(&nd.nd_boot, "swap", &nd.nd_swap, 5); 337 if (!error) { 338 mp = nfs_mount_diskless(&nd.nd_swap, "/swap", 0); 339 nfs_root(mp, &vp); 340 vfs_unbusy(mp, procp); 341 342 /* 343 * Since the swap file is not the root dir of a file system, 344 * hack it to a regular file. 345 */ 346 vp->v_type = VREG; 347 vp->v_flag = 0; 348 349 /* 350 * Next line is a hack to make swapmount() work on NFS swap files. 351 * XXX-smurph 352 */ 353 swdevt[0].sw_dev = NETDEV; 354 /* end hack */ 355 swdevt[0].sw_vp = vp; 356 357 /* 358 * Find out how large the swap file is. 359 */ 360 error = VOP_GETATTR(vp, &attr, procp->p_ucred, procp); 361 if (error) 362 printf("nfs_mountroot: getattr for swap\n"); 363 n = (long) (attr.va_size >> DEV_BSHIFT); 364 365 printf("swap on %s\n", nd.nd_swap.ndm_host); 366 #ifdef DEBUG 367 printf("swap size: 0x%lx (blocks)\n", n); 368 #endif 369 swdevt[0].sw_nblks = n; 370 return (0); 371 } 372 373 printf("WARNING: no swap\n"); 374 swdevt[0].sw_dev = NODEV; 375 swdevt[0].sw_vp = NULL; 376 swdevt[0].sw_nblks = 0; 377 378 return (0); 379 } 380 381 /* 382 * Internal version of mount system call for diskless setup. 383 */ 384 struct mount * 385 nfs_mount_diskless(ndmntp, mntname, mntflag) 386 struct nfs_dlmount *ndmntp; 387 char *mntname; 388 int mntflag; 389 { 390 struct nfs_args args; 391 struct mount *mp; 392 struct mbuf *m; 393 int error; 394 395 if (vfs_rootmountalloc("nfs", mntname, &mp)) 396 panic("nfs_mount_diskless: vfs_rootmountalloc failed"); 397 mp->mnt_flag |= mntflag; 398 399 /* Initialize mount args. */ 400 bzero((caddr_t) &args, sizeof(args)); 401 args.addr = (struct sockaddr *)&ndmntp->ndm_saddr; 402 args.addrlen = args.addr->sa_len; 403 args.sotype = SOCK_DGRAM; 404 args.fh = ndmntp->ndm_fh; 405 args.fhsize = NFSX_V2FH; 406 args.hostname = ndmntp->ndm_host; 407 408 #ifdef NFS_BOOT_OPTIONS 409 args.flags |= NFS_BOOT_OPTIONS; 410 #endif 411 #ifdef NFS_BOOT_RWSIZE 412 /* 413 * Reduce rsize,wsize for interfaces that consistently 414 * drop fragments of long UDP messages. (i.e. wd8003). 415 * You can always change these later via remount. 416 */ 417 args.flags |= NFSMNT_WSIZE | NFSMNT_RSIZE; 418 args.wsize = NFS_BOOT_RWSIZE; 419 args.rsize = NFS_BOOT_RWSIZE; 420 #endif 421 422 /* Get mbuf for server sockaddr. */ 423 m = m_get(M_WAIT, MT_SONAME); 424 bcopy((caddr_t)args.addr, mtod(m, caddr_t), 425 (m->m_len = args.addr->sa_len)); 426 427 error = mountnfs(&args, mp, m, mntname, args.hostname); 428 if (error) 429 panic("nfs_mountroot: mount %s failed: %d", mntname, error); 430 431 return (mp); 432 } 433 434 void 435 nfs_decode_args(nmp, argp, nargp) 436 struct nfsmount *nmp; 437 struct nfs_args *argp; 438 struct nfs_args *nargp; 439 { 440 int s; 441 int adjsock = 0; 442 int maxio; 443 444 s = splsoftnet(); 445 446 #if 0 447 /* Re-bind if rsrvd port requested and wasn't on one */ 448 adjsock = !(nmp->nm_flag & NFSMNT_RESVPORT) 449 && (argp->flags & NFSMNT_RESVPORT); 450 #endif 451 /* Also re-bind if we're switching to/from a connected UDP socket */ 452 adjsock |= ((nmp->nm_flag & NFSMNT_NOCONN) != 453 (argp->flags & NFSMNT_NOCONN)); 454 455 /* Update flags atomically. Don't change the lock bits. */ 456 nmp->nm_flag = 457 (argp->flags & ~NFSMNT_INTERNAL) | (nmp->nm_flag & NFSMNT_INTERNAL); 458 splx(s); 459 460 if ((argp->flags & NFSMNT_TIMEO) && argp->timeo > 0) { 461 nmp->nm_timeo = (argp->timeo * NFS_HZ + 5) / 10; 462 if (nmp->nm_timeo < NFS_MINTIMEO) 463 nmp->nm_timeo = NFS_MINTIMEO; 464 else if (nmp->nm_timeo > NFS_MAXTIMEO) 465 nmp->nm_timeo = NFS_MAXTIMEO; 466 } 467 468 if ((argp->flags & NFSMNT_RETRANS) && argp->retrans > 1) { 469 nmp->nm_retry = argp->retrans; 470 if (nmp->nm_retry > NFS_MAXREXMIT) 471 nmp->nm_retry = NFS_MAXREXMIT; 472 } 473 474 if (argp->flags & NFSMNT_NFSV3) { 475 if (argp->sotype == SOCK_DGRAM) 476 maxio = NFS_MAXDGRAMDATA; 477 else 478 maxio = NFS_MAXDATA; 479 } else 480 maxio = NFS_V2MAXDATA; 481 482 if ((argp->flags & NFSMNT_WSIZE) && argp->wsize > 0) { 483 int osize = nmp->nm_wsize; 484 nmp->nm_wsize = argp->wsize; 485 /* Round down to multiple of blocksize */ 486 nmp->nm_wsize &= ~(NFS_FABLKSIZE - 1); 487 if (nmp->nm_wsize <= 0) 488 nmp->nm_wsize = NFS_FABLKSIZE; 489 adjsock |= (nmp->nm_wsize != osize); 490 } 491 if (nmp->nm_wsize > maxio) 492 nmp->nm_wsize = maxio; 493 if (nmp->nm_wsize > MAXBSIZE) 494 nmp->nm_wsize = MAXBSIZE; 495 496 if ((argp->flags & NFSMNT_RSIZE) && argp->rsize > 0) { 497 int osize = nmp->nm_rsize; 498 nmp->nm_rsize = argp->rsize; 499 /* Round down to multiple of blocksize */ 500 nmp->nm_rsize &= ~(NFS_FABLKSIZE - 1); 501 if (nmp->nm_rsize <= 0) 502 nmp->nm_rsize = NFS_FABLKSIZE; 503 adjsock |= (nmp->nm_rsize != osize); 504 } 505 if (nmp->nm_rsize > maxio) 506 nmp->nm_rsize = maxio; 507 if (nmp->nm_rsize > MAXBSIZE) 508 nmp->nm_rsize = MAXBSIZE; 509 510 if ((argp->flags & NFSMNT_READDIRSIZE) && argp->readdirsize > 0) { 511 nmp->nm_readdirsize = argp->readdirsize; 512 /* Round down to multiple of blocksize */ 513 nmp->nm_readdirsize &= ~(NFS_DIRBLKSIZ - 1); 514 if (nmp->nm_readdirsize < NFS_DIRBLKSIZ) 515 nmp->nm_readdirsize = NFS_DIRBLKSIZ; 516 } else if (argp->flags & NFSMNT_RSIZE) 517 nmp->nm_readdirsize = nmp->nm_rsize; 518 519 if (nmp->nm_readdirsize > maxio) 520 nmp->nm_readdirsize = maxio; 521 522 if ((argp->flags & NFSMNT_MAXGRPS) && argp->maxgrouplist >= 0 && 523 argp->maxgrouplist <= NFS_MAXGRPS) 524 nmp->nm_numgrps = argp->maxgrouplist; 525 if ((argp->flags & NFSMNT_READAHEAD) && argp->readahead >= 0 && 526 argp->readahead <= NFS_MAXRAHEAD) 527 nmp->nm_readahead = argp->readahead; 528 if ((argp->flags & NFSMNT_DEADTHRESH) && argp->deadthresh >= 1 && 529 argp->deadthresh <= NQ_NEVERDEAD) 530 nmp->nm_deadthresh = argp->deadthresh; 531 if (argp->flags & NFSMNT_ACREGMIN && argp->acregmin >= 0) { 532 if (argp->acregmin > 0xffff) 533 nmp->nm_acregmin = 0xffff; 534 else 535 nmp->nm_acregmin = argp->acregmin; 536 } 537 if (argp->flags & NFSMNT_ACREGMAX && argp->acregmax >= 0) { 538 if (argp->acregmax > 0xffff) 539 nmp->nm_acregmax = 0xffff; 540 else 541 nmp->nm_acregmax = argp->acregmax; 542 } 543 if (nmp->nm_acregmin > nmp->nm_acregmax) 544 nmp->nm_acregmin = nmp->nm_acregmax; 545 546 if (argp->flags & NFSMNT_ACDIRMIN && argp->acdirmin >= 0) { 547 if (argp->acdirmin > 0xffff) 548 nmp->nm_acdirmin = 0xffff; 549 else 550 nmp->nm_acdirmin = argp->acdirmin; 551 } 552 if (argp->flags & NFSMNT_ACDIRMAX && argp->acdirmax >= 0) { 553 if (argp->acdirmax > 0xffff) 554 nmp->nm_acdirmax = 0xffff; 555 else 556 nmp->nm_acdirmax = argp->acdirmax; 557 } 558 if (nmp->nm_acdirmin > nmp->nm_acdirmax) 559 nmp->nm_acdirmin = nmp->nm_acdirmax; 560 561 if (nmp->nm_so && adjsock) { 562 nfs_disconnect(nmp); 563 if (nmp->nm_sotype == SOCK_DGRAM) 564 while (nfs_connect(nmp, (struct nfsreq *)0)) { 565 printf("nfs_args: retrying connect\n"); 566 (void) tsleep((caddr_t)&lbolt, 567 PSOCK, "nfscon", 0); 568 } 569 } 570 571 /* Update nargp based on nmp */ 572 nargp->wsize = nmp->nm_wsize; 573 nargp->rsize = nmp->nm_rsize; 574 nargp->readdirsize = nmp->nm_readdirsize; 575 nargp->timeo = nmp->nm_timeo; 576 nargp->retrans = nmp->nm_retry; 577 nargp->maxgrouplist = nmp->nm_numgrps; 578 nargp->readahead = nmp->nm_readahead; 579 nargp->deadthresh = nmp->nm_deadthresh; 580 nargp->acregmin = nmp->nm_acregmin; 581 nargp->acregmax = nmp->nm_acregmax; 582 nargp->acdirmin = nmp->nm_acdirmin; 583 nargp->acdirmax = nmp->nm_acdirmax; 584 } 585 586 /* 587 * VFS Operations. 588 * 589 * mount system call 590 * It seems a bit dumb to copyinstr() the host and path here and then 591 * bcopy() them in mountnfs(), but I wanted to detect errors before 592 * doing the sockargs() call because sockargs() allocates an mbuf and 593 * an error after that means that I have to release the mbuf. 594 */ 595 /* ARGSUSED */ 596 int 597 nfs_mount(mp, path, data, ndp, p) 598 struct mount *mp; 599 const char *path; 600 void *data; 601 struct nameidata *ndp; 602 struct proc *p; 603 { 604 int error; 605 struct nfs_args args; 606 struct mbuf *nam; 607 char pth[MNAMELEN], hst[MNAMELEN]; 608 size_t len; 609 u_char nfh[NFSX_V3FHMAX]; 610 611 error = copyin (data, &args, sizeof (args.version)); 612 if (error) 613 return (error); 614 if (args.version == 3) { 615 error = copyin (data, (caddr_t)&args, 616 sizeof (struct nfs_args3)); 617 args.flags &= ~(NFSMNT_INTERNAL|NFSMNT_NOAC); 618 } 619 else if (args.version == NFS_ARGSVERSION) { 620 error = copyin(data, (caddr_t)&args, sizeof (struct nfs_args)); 621 args.flags &= ~NFSMNT_NOAC; /* XXX - compatibility */ 622 } 623 else 624 return (EPROGMISMATCH); 625 if (error) 626 return (error); 627 628 if (nfs_niothreads < 0) { 629 nfs_niothreads = 4; 630 nfs_getset_niothreads(TRUE); 631 } 632 633 if (mp->mnt_flag & MNT_UPDATE) { 634 struct nfsmount *nmp = VFSTONFS(mp); 635 636 if (nmp == NULL) 637 return (EIO); 638 /* 639 * When doing an update, we can't change from or to 640 * v3. 641 */ 642 args.flags = (args.flags & ~(NFSMNT_NFSV3)) | 643 (nmp->nm_flag & (NFSMNT_NFSV3)); 644 nfs_decode_args(nmp, &args, &mp->mnt_stat.mount_info.nfs_args); 645 return (0); 646 } 647 if (args.fhsize < 0 || args.fhsize > NFSX_V3FHMAX) 648 return (EINVAL); 649 error = copyin((caddr_t)args.fh, (caddr_t)nfh, args.fhsize); 650 if (error) 651 return (error); 652 error = copyinstr(path, pth, MNAMELEN-1, &len); 653 if (error) 654 return (error); 655 bzero(&pth[len], MNAMELEN - len); 656 error = copyinstr(args.hostname, hst, MNAMELEN-1, &len); 657 if (error) 658 return (error); 659 bzero(&hst[len], MNAMELEN - len); 660 /* sockargs() call must be after above copyin() calls */ 661 error = sockargs(&nam, (caddr_t)args.addr, args.addrlen, MT_SONAME); 662 if (error) 663 return (error); 664 args.fh = nfh; 665 error = mountnfs(&args, mp, nam, pth, hst); 666 return (error); 667 } 668 669 /* 670 * Common code for mount and mountroot 671 */ 672 int 673 mountnfs(argp, mp, nam, pth, hst) 674 struct nfs_args *argp; 675 struct mount *mp; 676 struct mbuf *nam; 677 char *pth, *hst; 678 { 679 struct nfsmount *nmp; 680 int error; 681 682 if (mp->mnt_flag & MNT_UPDATE) { 683 nmp = VFSTONFS(mp); 684 /* update paths, file handles, etc, here XXX */ 685 m_freem(nam); 686 return (0); 687 } else { 688 MALLOC(nmp, struct nfsmount *, sizeof (struct nfsmount), 689 M_NFSMNT, M_WAITOK); 690 bzero((caddr_t)nmp, sizeof (struct nfsmount)); 691 mp->mnt_data = (qaddr_t)nmp; 692 TAILQ_INIT(&nmp->nm_uidlruhead); 693 } 694 695 vfs_getnewfsid(mp); 696 nmp->nm_mountp = mp; 697 nmp->nm_timeo = NFS_TIMEO; 698 nmp->nm_retry = NFS_RETRANS; 699 nmp->nm_wsize = NFS_WSIZE; 700 nmp->nm_rsize = NFS_RSIZE; 701 nmp->nm_readdirsize = NFS_READDIRSIZE; 702 nmp->nm_numgrps = NFS_MAXGRPS; 703 nmp->nm_readahead = NFS_DEFRAHEAD; 704 nmp->nm_deadthresh = NQ_DEADTHRESH; 705 CIRCLEQ_INIT(&nmp->nm_timerhead); 706 nmp->nm_inprog = NULLVP; 707 nmp->nm_fhsize = argp->fhsize; 708 nmp->nm_acregmin = NFS_MINATTRTIMO; 709 nmp->nm_acregmax = NFS_MAXATTRTIMO; 710 nmp->nm_acdirmin = NFS_MINATTRTIMO; 711 nmp->nm_acdirmax = NFS_MAXATTRTIMO; 712 bcopy((caddr_t)argp->fh, (caddr_t)nmp->nm_fh, argp->fhsize); 713 strncpy(&mp->mnt_stat.f_fstypename[0], mp->mnt_vfc->vfc_name, MFSNAMELEN); 714 bcopy(hst, mp->mnt_stat.f_mntfromname, MNAMELEN); 715 bcopy(pth, mp->mnt_stat.f_mntonname, MNAMELEN); 716 bcopy(argp, &mp->mnt_stat.mount_info.nfs_args, sizeof(*argp)); 717 nmp->nm_nam = nam; 718 nfs_decode_args(nmp, argp, &mp->mnt_stat.mount_info.nfs_args); 719 720 /* Set up the sockets and per-host congestion */ 721 nmp->nm_sotype = argp->sotype; 722 nmp->nm_soproto = argp->proto; 723 724 /* 725 * For Connection based sockets (TCP,...) defer the connect until 726 * the first request, in case the server is not responding. 727 */ 728 if (nmp->nm_sotype == SOCK_DGRAM && 729 (error = nfs_connect(nmp, (struct nfsreq *)0))) 730 goto bad; 731 732 /* 733 * This is silly, but it has to be set so that vinifod() works. 734 * We do not want to do an nfs_statfs() here since we can get 735 * stuck on a dead server and we are holding a lock on the mount 736 * point. 737 */ 738 mp->mnt_stat.f_iosize = NFS_MAXDGRAMDATA; 739 740 return (0); 741 bad: 742 nfs_disconnect(nmp); 743 free((caddr_t)nmp, M_NFSMNT); 744 m_freem(nam); 745 return (error); 746 } 747 748 /* 749 * unmount system call 750 */ 751 int 752 nfs_unmount(mp, mntflags, p) 753 struct mount *mp; 754 int mntflags; 755 struct proc *p; 756 { 757 struct nfsmount *nmp; 758 int error, flags = 0; 759 760 if (mntflags & MNT_FORCE) 761 flags |= FORCECLOSE; 762 nmp = VFSTONFS(mp); 763 /* 764 * Goes something like this.. 765 * - Call vflush() to clear out vnodes for this file system, 766 * except for the root vnode. 767 * - Close the socket 768 * - Free up the data structures 769 */ 770 771 /* 772 * Must handshake with nqnfs_clientd() if it is active. 773 */ 774 nmp->nm_flag |= NFSMNT_DISMINPROG; 775 while (nmp->nm_inprog != NULLVP) 776 (void) tsleep((caddr_t)&lbolt, PSOCK, "nfsdism", 0); 777 error = vflush(mp, NULL, flags); 778 if (error) { 779 nmp->nm_flag &= ~NFSMNT_DISMINPROG; 780 return (error); 781 } 782 783 /* 784 * We are now committed to the unmount. 785 * For NQNFS, let the server daemon free the nfsmount structure. 786 */ 787 if (nmp->nm_flag & NFSMNT_KERB) 788 nmp->nm_flag |= NFSMNT_DISMNT; 789 790 nfs_disconnect(nmp); 791 m_freem(nmp->nm_nam); 792 793 if ((nmp->nm_flag & NFSMNT_KERB) == 0) 794 free((caddr_t)nmp, M_NFSMNT); 795 return (0); 796 } 797 798 /* 799 * Return root of a filesystem 800 */ 801 int 802 nfs_root(mp, vpp) 803 struct mount *mp; 804 struct vnode **vpp; 805 { 806 struct nfsmount *nmp; 807 struct nfsnode *np; 808 int error; 809 810 nmp = VFSTONFS(mp); 811 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np); 812 if (error) 813 return (error); 814 *vpp = NFSTOV(np); 815 return (0); 816 } 817 818 extern int syncprt; 819 820 /* 821 * Flush out the buffer cache 822 */ 823 /* ARGSUSED */ 824 int 825 nfs_sync(mp, waitfor, cred, p) 826 struct mount *mp; 827 int waitfor; 828 struct ucred *cred; 829 struct proc *p; 830 { 831 struct vnode *vp; 832 int error, allerror = 0; 833 834 /* 835 * Force stale buffer cache information to be flushed. 836 */ 837 loop: 838 for (vp = LIST_FIRST(&mp->mnt_vnodelist); vp != NULL; 839 vp = LIST_NEXT(vp, v_mntvnodes)) { 840 /* 841 * If the vnode that we are about to sync is no longer 842 * associated with this mount point, start over. 843 */ 844 if (vp->v_mount != mp) 845 goto loop; 846 if (VOP_ISLOCKED(vp) || LIST_FIRST(&vp->v_dirtyblkhd) == NULL || 847 waitfor == MNT_LAZY) 848 continue; 849 if (vget(vp, LK_EXCLUSIVE, p)) 850 goto loop; 851 error = VOP_FSYNC(vp, cred, waitfor, p); 852 if (error) 853 allerror = error; 854 vput(vp); 855 } 856 return (allerror); 857 } 858 859 /* 860 * NFS flat namespace lookup. 861 * Currently unsupported. 862 */ 863 /* ARGSUSED */ 864 int 865 nfs_vget(mp, ino, vpp) 866 struct mount *mp; 867 ino_t ino; 868 struct vnode **vpp; 869 { 870 871 return (EOPNOTSUPP); 872 } 873 874 /* 875 * Do that sysctl thang... 876 */ 877 int 878 nfs_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, void *newp, 879 size_t newlen, struct proc *p) 880 { 881 int rv; 882 883 /* 884 * All names at this level are terminal. 885 */ 886 if(namelen > 1) 887 return ENOTDIR; /* overloaded */ 888 889 switch(name[0]) { 890 case NFS_NFSSTATS: 891 if(!oldp) { 892 *oldlenp = sizeof nfsstats; 893 return 0; 894 } 895 896 if(*oldlenp < sizeof nfsstats) { 897 *oldlenp = sizeof nfsstats; 898 return ENOMEM; 899 } 900 901 rv = copyout(&nfsstats, oldp, sizeof nfsstats); 902 if(rv) return rv; 903 904 if(newp && newlen != sizeof nfsstats) 905 return EINVAL; 906 907 if(newp) { 908 return copyin(newp, &nfsstats, sizeof nfsstats); 909 } 910 return 0; 911 912 case NFS_NIOTHREADS: 913 nfs_getset_niothreads(0); 914 915 rv = sysctl_int(oldp, oldlenp, newp, newlen, &nfs_niothreads); 916 if (newp) 917 nfs_getset_niothreads(1); 918 919 return rv; 920 921 default: 922 return EOPNOTSUPP; 923 } 924 } 925 926 927 /* 928 * At this point, this should never happen 929 */ 930 /* ARGSUSED */ 931 int 932 nfs_fhtovp(mp, fhp, vpp) 933 struct mount *mp; 934 struct fid *fhp; 935 struct vnode **vpp; 936 { 937 938 return (EINVAL); 939 } 940 941 /* 942 * Vnode pointer to File handle, should never happen either 943 */ 944 /* ARGSUSED */ 945 int 946 nfs_vptofh(vp, fhp) 947 struct vnode *vp; 948 struct fid *fhp; 949 { 950 951 return (EINVAL); 952 } 953 954 /* 955 * Vfs start routine, a no-op. 956 */ 957 /* ARGSUSED */ 958 int 959 nfs_start(mp, flags, p) 960 struct mount *mp; 961 int flags; 962 struct proc *p; 963 { 964 965 return (0); 966 } 967 968 /* 969 * Do operations associated with quotas, not supported 970 */ 971 /* ARGSUSED */ 972 int 973 nfs_quotactl(mp, cmd, uid, arg, p) 974 struct mount *mp; 975 int cmd; 976 uid_t uid; 977 caddr_t arg; 978 struct proc *p; 979 { 980 981 return (EOPNOTSUPP); 982 } 983 984 /* 985 * check export permission, not supported 986 */ 987 /* ARGUSED */ 988 int 989 nfs_checkexp(mp, nam, exflagsp, credanonp) 990 struct mount *mp; 991 struct mbuf *nam; 992 int *exflagsp; 993 struct ucred **credanonp; 994 { 995 return (EOPNOTSUPP); 996 } 997 998