nfs_vfsops.c revision 1.63
1 /* $NetBSD: nfs_vfsops.c,v 1.63 1997/08/29 16:12:51 gwr Exp $ */ 2 3 /* 4 * Copyright (c) 1989, 1993, 1995 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Rick Macklem at The University of Guelph. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)nfs_vfsops.c 8.12 (Berkeley) 5/20/95 39 */ 40 41 #include <sys/param.h> 42 #include <sys/conf.h> 43 #include <sys/ioctl.h> 44 #include <sys/signal.h> 45 #include <sys/proc.h> 46 #include <sys/namei.h> 47 #include <sys/device.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 57 #include <net/if.h> 58 #include <net/route.h> 59 #include <netinet/in.h> 60 61 #include <nfs/rpcv2.h> 62 #include <nfs/nfsproto.h> 63 #include <nfs/nfsnode.h> 64 #include <nfs/nfs.h> 65 #include <nfs/nfsmount.h> 66 #include <nfs/xdr_subs.h> 67 #include <nfs/nfsm_subs.h> 68 #include <nfs/nfsdiskless.h> 69 #include <nfs/nqnfs.h> 70 #include <nfs/nfs_var.h> 71 72 extern struct nfsstats nfsstats; 73 extern int nfs_ticks; 74 75 #ifdef notyet 76 static int nfs_sysctl(int *, u_int, void *, size_t *, void *, size_t, 77 struct proc *); 78 #endif 79 80 /* 81 * nfs vfs operations. 82 */ 83 struct vfsops nfs_vfsops = { 84 MOUNT_NFS, 85 nfs_mount, 86 nfs_start, 87 nfs_unmount, 88 nfs_root, 89 nfs_quotactl, 90 nfs_statfs, 91 nfs_sync, 92 nfs_vget, 93 nfs_fhtovp, 94 nfs_vptofh, 95 nfs_vfs_init, 96 nfs_mountroot, 97 #ifdef notyet 98 nfs_sysctl 99 #endif 100 }; 101 102 extern u_int32_t nfs_procids[NFS_NPROCS]; 103 extern u_int32_t nfs_prog, nfs_vers; 104 105 static int 106 nfs_mount_diskless __P((struct nfs_dlmount *, const char *, 107 struct mount **, struct vnode **)); 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; 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 #ifndef nolint 135 sfp = (struct nfs_statfs *)0; 136 #endif 137 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np); 138 if (error) 139 return (error); 140 vp = NFSTOV(np); 141 cred = crget(); 142 cred->cr_ngroups = 0; 143 if (v3 && (nmp->nm_flag & NFSMNT_GOTFSINFO) == 0) 144 (void)nfs_fsinfo(nmp, vp, cred, p); 145 nfsstats.rpccnt[NFSPROC_FSSTAT]++; 146 nfsm_reqhead(vp, NFSPROC_FSSTAT, NFSX_FH(v3)); 147 nfsm_fhtom(vp, v3); 148 nfsm_request(vp, NFSPROC_FSSTAT, p, cred); 149 if (v3) 150 nfsm_postop_attr(vp, retattr); 151 if (error) { 152 if (mrep != NULL) 153 m_free(mrep); 154 goto nfsmout; 155 } 156 nfsm_dissect(sfp, struct nfs_statfs *, NFSX_STATFS(v3)); 157 #ifdef COMPAT_09 158 sbp->f_type = 2; 159 #else 160 sbp->f_type = 0; 161 #endif 162 sbp->f_flags = nmp->nm_flag; 163 sbp->f_iosize = min(nmp->nm_rsize, nmp->nm_wsize); 164 if (v3) { 165 sbp->f_bsize = NFS_FABLKSIZE; 166 fxdr_hyper(&sfp->sf_tbytes, &tquad); 167 sbp->f_blocks = (long)(tquad / ((u_quad_t)NFS_FABLKSIZE)); 168 fxdr_hyper(&sfp->sf_fbytes, &tquad); 169 sbp->f_bfree = (long)(tquad / ((u_quad_t)NFS_FABLKSIZE)); 170 fxdr_hyper(&sfp->sf_abytes, &tquad); 171 sbp->f_bavail = (long)(tquad / ((u_quad_t)NFS_FABLKSIZE)); 172 sbp->f_files = (fxdr_unsigned(int32_t, 173 sfp->sf_tfiles.nfsuquad[1]) & 0x7fffffff); 174 sbp->f_ffree = (fxdr_unsigned(int32_t, 175 sfp->sf_ffiles.nfsuquad[1]) & 0x7fffffff); 176 } else { 177 sbp->f_bsize = fxdr_unsigned(int32_t, sfp->sf_bsize); 178 sbp->f_blocks = fxdr_unsigned(int32_t, sfp->sf_blocks); 179 sbp->f_bfree = fxdr_unsigned(int32_t, sfp->sf_bfree); 180 sbp->f_bavail = fxdr_unsigned(int32_t, sfp->sf_bavail); 181 sbp->f_files = 0; 182 sbp->f_ffree = 0; 183 } 184 if (sbp != &mp->mnt_stat) { 185 bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN); 186 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); 187 } 188 strncpy(&sbp->f_fstypename[0], mp->mnt_op->vfs_name, MFSNAMELEN); 189 nfsm_reqdone; 190 vrele(vp); 191 crfree(cred); 192 return (error); 193 } 194 195 /* 196 * nfs version 3 fsinfo rpc call 197 */ 198 int 199 nfs_fsinfo(nmp, vp, cred, p) 200 register struct nfsmount *nmp; 201 register struct vnode *vp; 202 struct ucred *cred; 203 struct proc *p; 204 { 205 register struct nfsv3_fsinfo *fsp; 206 register caddr_t cp; 207 register int32_t t1, t2; 208 register u_int32_t *tl, pref, max; 209 caddr_t bpos, dpos, cp2; 210 int error = 0, retattr; 211 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 212 u_int64_t maxfsize; 213 214 nfsstats.rpccnt[NFSPROC_FSINFO]++; 215 nfsm_reqhead(vp, NFSPROC_FSINFO, NFSX_FH(1)); 216 nfsm_fhtom(vp, 1); 217 nfsm_request(vp, NFSPROC_FSINFO, p, cred); 218 nfsm_postop_attr(vp, retattr); 219 if (!error) { 220 nfsm_dissect(fsp, struct nfsv3_fsinfo *, NFSX_V3FSINFO); 221 pref = fxdr_unsigned(u_int32_t, fsp->fs_wtpref); 222 if (pref < nmp->nm_wsize && pref >= NFS_FABLKSIZE) 223 nmp->nm_wsize = (pref + NFS_FABLKSIZE - 1) & 224 ~(NFS_FABLKSIZE - 1); 225 max = fxdr_unsigned(u_int32_t, fsp->fs_wtmax); 226 if (max < nmp->nm_wsize && max > 0) { 227 nmp->nm_wsize = max & ~(NFS_FABLKSIZE - 1); 228 if (nmp->nm_wsize == 0) 229 nmp->nm_wsize = max; 230 } 231 pref = fxdr_unsigned(u_int32_t, fsp->fs_rtpref); 232 if (pref < nmp->nm_rsize && pref >= NFS_FABLKSIZE) 233 nmp->nm_rsize = (pref + NFS_FABLKSIZE - 1) & 234 ~(NFS_FABLKSIZE - 1); 235 max = fxdr_unsigned(u_int32_t, fsp->fs_rtmax); 236 if (max < nmp->nm_rsize && max > 0) { 237 nmp->nm_rsize = max & ~(NFS_FABLKSIZE - 1); 238 if (nmp->nm_rsize == 0) 239 nmp->nm_rsize = max; 240 } 241 pref = fxdr_unsigned(u_int32_t, fsp->fs_dtpref); 242 if (pref < nmp->nm_readdirsize && pref >= NFS_DIRBLKSIZ) 243 nmp->nm_readdirsize = (pref + NFS_DIRBLKSIZ - 1) & 244 ~(NFS_DIRBLKSIZ - 1); 245 if (max < nmp->nm_readdirsize && max > 0) { 246 nmp->nm_readdirsize = max & ~(NFS_DIRBLKSIZ - 1); 247 if (nmp->nm_readdirsize == 0) 248 nmp->nm_readdirsize = max; 249 } 250 /* XXX */ 251 nmp->nm_maxfilesize = (u_int64_t)0x80000000 * DEV_BSIZE - 1; 252 fxdr_hyper(&fsp->fs_maxfilesize, &maxfsize); 253 if (maxfsize > 0 && maxfsize < nmp->nm_maxfilesize) 254 nmp->nm_maxfilesize = maxfsize; 255 nmp->nm_flag |= NFSMNT_GOTFSINFO; 256 } 257 nfsm_reqdone; 258 return (error); 259 } 260 261 /* 262 * Mount a remote root fs via. NFS. It goes like this: 263 * - Call nfs_boot_init() to fill in the nfs_diskless struct 264 * - build the rootfs mount point and call mountnfs() to do the rest. 265 */ 266 int 267 nfs_mountroot() 268 { 269 struct nfs_diskless *nd; 270 struct vattr attr; 271 struct mount *mp; 272 struct vnode *vp; 273 struct proc *procp; 274 long n; 275 int error; 276 277 procp = curproc; /* XXX */ 278 279 if (root_device->dv_class != DV_IFNET) 280 return (ENODEV); 281 282 /* 283 * XXX time must be non-zero when we init the interface or else 284 * the arp code will wedge. [Fixed now in if_ether.c] 285 * However, the NFS attribute cache gives false "hits" when 286 * time.tv_sec < NFS_ATTRTIMEO(np) so keep this in for now. 287 */ 288 if (time.tv_sec < NFS_MAXATTRTIMO) 289 time.tv_sec = NFS_MAXATTRTIMO; 290 291 /* 292 * Call nfs_boot_init() to fill in the nfs_diskless struct. 293 * Side effect: Finds and configures a network interface. 294 */ 295 nd = malloc(sizeof(*nd), M_NFSMNT, M_WAITOK); 296 bzero((caddr_t)nd, sizeof(*nd)); 297 error = nfs_boot_init(nd, procp); 298 if (error) 299 goto out; 300 301 /* 302 * Create the root mount point. 303 */ 304 error = nfs_boot_getfh(&nd->nd_root); 305 if (error) 306 goto out; 307 error = nfs_mount_diskless(&nd->nd_root, "/", &mp, &vp); 308 if (error) 309 goto out; 310 printf("root on %s\n", nd->nd_root.ndm_host); 311 312 /* 313 * Link it into the mount list. 314 */ 315 #ifdef Lite2_integrated 316 simple_lock(&mountlist_slock); 317 CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list); 318 simple_unlock(&mountlist_slock); 319 rootvp = vp; 320 vfs_unbusy(mp, procp); 321 #else 322 if (vfs_lock(mp)) 323 panic("nfs_mountroot: vfs_lock"); 324 CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list); 325 mp->mnt_vnodecovered = NULLVP; 326 vfs_unlock(mp); 327 rootvp = vp; 328 #endif 329 330 /* Get root attributes (for the time). */ 331 error = VOP_GETATTR(vp, &attr, procp->p_ucred, procp); 332 if (error) 333 panic("nfs_mountroot: getattr for root"); 334 n = attr.va_mtime.tv_sec; 335 #ifdef DEBUG 336 printf("root time: 0x%lx\n", n); 337 #endif 338 inittodr(n); 339 340 #if 0 341 /* 342 * XXX splnet, so networks will receive... 343 * XXX Which port needed this hack? 344 * XXX Should already be at spl0. 345 */ 346 splnet(); 347 #endif 348 349 #if 0 /* swap now comes in from swapctl(2) */ 350 #ifdef notyet 351 /* Set up swap credentials. */ 352 proc0.p_ucred->cr_uid = 0; 353 proc0.p_ucred->cr_gid = 0; 354 proc0.p_ucred->cr_ngroups = 0; 355 #endif 356 357 /* 358 * "Mount" the swap device. 359 * 360 * On a "dataless" configuration (swap on disk) we will have: 361 * (swdevt[0].sw_dev != NODEV) identifying the swap device. 362 */ 363 if (bdevvp(swapdev, &swapdev_vp)) 364 panic("nfs_mountroot: can't setup swap vp"); 365 if (swdevt[0].sw_dev != NODEV) { 366 printf("swap on device 0x%x\n", swdevt[0].sw_dev); 367 error = 0; 368 goto out; 369 } 370 371 /* 372 * If swapping to an nfs node: (swdevt[0].sw_dev == NODEV) 373 * Create a fake mount point just for the swap vnode so that the 374 * swap file can be on a different server from the rootfs. 375 */ 376 error = nfs_boot_getfh(&nd->nd_swap); 377 if (error) { 378 printf("nfs_boot: warning: getfh(swap), error=%d\n", error); 379 error = 0; 380 goto out; 381 } 382 error = nfs_mount_diskless(&nd->nd_swap, "/swap", &mp, &vp); 383 if (error) { 384 printf("nfs_boot: warning: mount(swap), error=%d\n", error); 385 error = 0; 386 goto out; 387 } 388 #ifdef Lite2_integrated 389 vfs_unbusy(mp, procp); 390 #endif 391 printf("swap on %s\n", nd->nd_swap.ndm_host); 392 393 /* 394 * Since the swap file is not the root dir of a file system, 395 * hack it to a regular file. 396 */ 397 vp->v_type = VREG; 398 vp->v_flag = 0; 399 swdevt[0].sw_vp = vp; 400 401 /* 402 * Find out how large the swap file is. 403 */ 404 error = VOP_GETATTR(vp, &attr, procp->p_ucred, procp); 405 if (error) 406 panic("nfs_mountroot: getattr for swap"); 407 n = (long) (attr.va_size >> DEV_BSHIFT); 408 #ifdef DEBUG 409 printf("swap size: 0x%lx (blocks)\n", n); 410 #endif 411 swdevt[0].sw_nblks = n; 412 #endif 413 414 out: 415 free(nd, M_NFSMNT); 416 return (error); 417 } 418 419 /* 420 * Internal version of mount system call for diskless setup. 421 * Separate function because we used to call it twice. 422 * (once for root and once for swap) 423 */ 424 static int 425 nfs_mount_diskless(ndmntp, mntname, mpp, vpp) 426 struct nfs_dlmount *ndmntp; 427 const char *mntname; /* mount point name */ 428 struct mount **mpp; 429 struct vnode **vpp; 430 { 431 struct mount *mp; 432 struct mbuf *m; 433 int error; 434 435 #ifdef Lite2_integrated 436 vfs_rootmountalloc("nfs", mntname, &mp); 437 #else 438 /* Create the mount point. */ 439 mp = (struct mount *)malloc((u_long)sizeof(struct mount), 440 M_MOUNT, M_WAITOK); 441 bzero((char *)mp, (u_long)sizeof(struct mount)); 442 #endif 443 mp->mnt_op = &nfs_vfsops; 444 /* mp->mnt_flag = 0 */ 445 446 /* Get mbuf for server sockaddr. */ 447 m = m_get(M_WAIT, MT_SONAME); 448 if (m == NULL) 449 panic("nfs_mountroot: mget soname for %s", mntname); 450 bcopy((caddr_t)ndmntp->ndm_args.addr, mtod(m, caddr_t), 451 (m->m_len = ndmntp->ndm_args.addr->sa_len)); 452 453 error = mountnfs(&ndmntp->ndm_args, mp, m, mntname, 454 ndmntp->ndm_args.hostname, vpp); 455 if (error) { 456 printf("nfs_mountroot: mount %s failed: %d\n", 457 mntname, error); 458 free(mp, M_MOUNT); 459 } else 460 *mpp = mp; 461 462 return (error); 463 } 464 465 void 466 nfs_decode_args(nmp, argp) 467 struct nfsmount *nmp; 468 struct nfs_args *argp; 469 { 470 int s; 471 int adjsock; 472 int maxio; 473 474 s = splsoftnet(); 475 476 /* 477 * Silently clear NFSMNT_NOCONN if it's a TCP mount, it makes 478 * no sense in that context. 479 */ 480 if (argp->sotype == SOCK_STREAM) 481 argp->flags &= ~NFSMNT_NOCONN; 482 483 /* Re-bind if rsrvd port requested and wasn't on one */ 484 adjsock = !(nmp->nm_flag & NFSMNT_RESVPORT) 485 && (argp->flags & NFSMNT_RESVPORT); 486 /* Also re-bind if we're switching to/from a connected UDP socket */ 487 adjsock |= ((nmp->nm_flag & NFSMNT_NOCONN) != 488 (argp->flags & NFSMNT_NOCONN)); 489 490 /* Update flags atomically. Don't change the lock bits. */ 491 nmp->nm_flag = 492 (argp->flags & ~NFSMNT_INTERNAL) | (nmp->nm_flag & NFSMNT_INTERNAL); 493 splx(s); 494 495 if ((argp->flags & NFSMNT_TIMEO) && argp->timeo > 0) { 496 nmp->nm_timeo = (argp->timeo * NFS_HZ + 5) / 10; 497 if (nmp->nm_timeo < NFS_MINTIMEO) 498 nmp->nm_timeo = NFS_MINTIMEO; 499 else if (nmp->nm_timeo > NFS_MAXTIMEO) 500 nmp->nm_timeo = NFS_MAXTIMEO; 501 } 502 503 if ((argp->flags & NFSMNT_RETRANS) && argp->retrans > 1) { 504 nmp->nm_retry = argp->retrans; 505 if (nmp->nm_retry > NFS_MAXREXMIT) 506 nmp->nm_retry = NFS_MAXREXMIT; 507 } 508 509 if (argp->flags & NFSMNT_NFSV3) { 510 if (argp->sotype == SOCK_DGRAM) 511 maxio = NFS_MAXDGRAMDATA; 512 else 513 maxio = NFS_MAXDATA; 514 } else 515 maxio = NFS_V2MAXDATA; 516 517 if ((argp->flags & NFSMNT_WSIZE) && argp->wsize > 0) { 518 int osize = nmp->nm_wsize; 519 nmp->nm_wsize = argp->wsize; 520 /* Round down to multiple of blocksize */ 521 nmp->nm_wsize &= ~(NFS_FABLKSIZE - 1); 522 if (nmp->nm_wsize <= 0) 523 nmp->nm_wsize = NFS_FABLKSIZE; 524 adjsock |= (nmp->nm_wsize != osize); 525 } 526 if (nmp->nm_wsize > maxio) 527 nmp->nm_wsize = maxio; 528 if (nmp->nm_wsize > MAXBSIZE) 529 nmp->nm_wsize = MAXBSIZE; 530 531 if ((argp->flags & NFSMNT_RSIZE) && argp->rsize > 0) { 532 int osize = nmp->nm_rsize; 533 nmp->nm_rsize = argp->rsize; 534 /* Round down to multiple of blocksize */ 535 nmp->nm_rsize &= ~(NFS_FABLKSIZE - 1); 536 if (nmp->nm_rsize <= 0) 537 nmp->nm_rsize = NFS_FABLKSIZE; 538 adjsock |= (nmp->nm_rsize != osize); 539 } 540 if (nmp->nm_rsize > maxio) 541 nmp->nm_rsize = maxio; 542 if (nmp->nm_rsize > MAXBSIZE) 543 nmp->nm_rsize = MAXBSIZE; 544 545 if ((argp->flags & NFSMNT_READDIRSIZE) && argp->readdirsize > 0) { 546 nmp->nm_readdirsize = argp->readdirsize; 547 /* Round down to multiple of blocksize */ 548 nmp->nm_readdirsize &= ~(NFS_DIRBLKSIZ - 1); 549 if (nmp->nm_readdirsize < NFS_DIRBLKSIZ) 550 nmp->nm_readdirsize = NFS_DIRBLKSIZ; 551 } else if (argp->flags & NFSMNT_RSIZE) 552 nmp->nm_readdirsize = nmp->nm_rsize; 553 554 if (nmp->nm_readdirsize > maxio) 555 nmp->nm_readdirsize = maxio; 556 557 if ((argp->flags & NFSMNT_MAXGRPS) && argp->maxgrouplist >= 0 && 558 argp->maxgrouplist <= NFS_MAXGRPS) 559 nmp->nm_numgrps = argp->maxgrouplist; 560 if ((argp->flags & NFSMNT_READAHEAD) && argp->readahead >= 0 && 561 argp->readahead <= NFS_MAXRAHEAD) 562 nmp->nm_readahead = argp->readahead; 563 if ((argp->flags & NFSMNT_LEASETERM) && argp->leaseterm >= 2 && 564 argp->leaseterm <= NQ_MAXLEASE) 565 nmp->nm_leaseterm = argp->leaseterm; 566 if ((argp->flags & NFSMNT_DEADTHRESH) && argp->deadthresh >= 1 && 567 argp->deadthresh <= NQ_NEVERDEAD) 568 nmp->nm_deadthresh = argp->deadthresh; 569 570 adjsock |= ((nmp->nm_sotype != argp->sotype) || 571 (nmp->nm_soproto != argp->proto)); 572 nmp->nm_sotype = argp->sotype; 573 nmp->nm_soproto = argp->proto; 574 575 if (nmp->nm_so && adjsock) { 576 nfs_disconnect(nmp); 577 if (nmp->nm_sotype == SOCK_DGRAM) 578 while (nfs_connect(nmp, (struct nfsreq *)0)) { 579 printf("nfs_args: retrying connect\n"); 580 (void) tsleep((caddr_t)&lbolt, 581 PSOCK, "nfscon", 0); 582 } 583 } 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 struct vnode *vp; 608 char pth[MNAMELEN], hst[MNAMELEN]; 609 size_t len; 610 u_char nfh[NFSX_V3FHMAX]; 611 612 error = copyin(data, (caddr_t)&args, sizeof (struct nfs_args)); 613 if (error) 614 return (error); 615 if (args.version != NFS_ARGSVERSION) 616 return (EPROGMISMATCH); 617 if (mp->mnt_flag & MNT_UPDATE) { 618 register struct nfsmount *nmp = VFSTONFS(mp); 619 620 if (nmp == NULL) 621 return (EIO); 622 /* 623 * When doing an update, we can't change from or to 624 * v3 and/or nqnfs. 625 */ 626 args.flags = (args.flags & ~(NFSMNT_NFSV3|NFSMNT_NQNFS)) | 627 (nmp->nm_flag & (NFSMNT_NFSV3|NFSMNT_NQNFS)); 628 nfs_decode_args(nmp, &args); 629 return (0); 630 } 631 error = copyin((caddr_t)args.fh, (caddr_t)nfh, args.fhsize); 632 if (error) 633 return (error); 634 error = copyinstr(path, pth, MNAMELEN-1, &len); 635 if (error) 636 return (error); 637 bzero(&pth[len], MNAMELEN - len); 638 error = copyinstr(args.hostname, hst, MNAMELEN-1, &len); 639 if (error) 640 return (error); 641 bzero(&hst[len], MNAMELEN - len); 642 /* sockargs() call must be after above copyin() calls */ 643 error = sockargs(&nam, (caddr_t)args.addr, args.addrlen, MT_SONAME); 644 if (error) 645 return (error); 646 args.fh = nfh; 647 error = mountnfs(&args, mp, nam, pth, hst, &vp); 648 return (error); 649 } 650 651 /* 652 * Common code for mount and mountroot 653 */ 654 int 655 mountnfs(argp, mp, nam, pth, hst, vpp) 656 register struct nfs_args *argp; 657 register struct mount *mp; 658 struct mbuf *nam; 659 const char *pth, *hst; 660 struct vnode **vpp; 661 { 662 register struct nfsmount *nmp; 663 struct nfsnode *np; 664 int error; 665 struct vattr attrs; 666 667 if (mp->mnt_flag & MNT_UPDATE) { 668 nmp = VFSTONFS(mp); 669 /* update paths, file handles, etc, here XXX */ 670 m_freem(nam); 671 return (0); 672 } else { 673 MALLOC(nmp, struct nfsmount *, sizeof (struct nfsmount), 674 M_NFSMNT, M_WAITOK); 675 bzero((caddr_t)nmp, sizeof (struct nfsmount)); 676 mp->mnt_data = (qaddr_t)nmp; 677 TAILQ_INIT(&nmp->nm_uidlruhead); 678 TAILQ_INIT(&nmp->nm_bufq); 679 } 680 #ifdef Lite2_integrated 681 vfs_getnewfsid(mp, makefstype(MOUNT_NFS)); 682 #else 683 getnewfsid(mp, makefstype(MOUNT_NFS)); 684 #endif 685 nmp->nm_mountp = mp; 686 687 if (argp->flags & NFSMNT_NQNFS) 688 /* 689 * We have to set mnt_maxsymlink to a non-zero value so 690 * that COMPAT_43 routines will know that we are setting 691 * the d_type field in directories (and can zero it for 692 * unsuspecting binaries). 693 */ 694 mp->mnt_maxsymlinklen = 1; 695 696 if ((argp->flags & NFSMNT_NFSV3) == 0) 697 /* 698 * V2 can only handle 32 bit filesizes. For v3, nfs_fsinfo 699 * will fill this in. 700 */ 701 nmp->nm_maxfilesize = 0xffffffffLL; 702 703 nmp->nm_timeo = NFS_TIMEO; 704 nmp->nm_retry = NFS_RETRANS; 705 nmp->nm_wsize = NFS_WSIZE; 706 nmp->nm_rsize = NFS_RSIZE; 707 nmp->nm_readdirsize = NFS_READDIRSIZE; 708 nmp->nm_numgrps = NFS_MAXGRPS; 709 nmp->nm_readahead = NFS_DEFRAHEAD; 710 nmp->nm_leaseterm = NQ_DEFLEASE; 711 nmp->nm_deadthresh = NQ_DEADTHRESH; 712 CIRCLEQ_INIT(&nmp->nm_timerhead); 713 nmp->nm_inprog = NULLVP; 714 nmp->nm_fhsize = argp->fhsize; 715 bcopy((caddr_t)argp->fh, (caddr_t)nmp->nm_fh, argp->fhsize); 716 #ifdef COMPAT_09 717 mp->mnt_stat.f_type = 2; 718 #else 719 mp->mnt_stat.f_type = 0; 720 #endif 721 strncpy(&mp->mnt_stat.f_fstypename[0], mp->mnt_op->vfs_name, MFSNAMELEN); 722 bcopy(hst, mp->mnt_stat.f_mntfromname, MNAMELEN); 723 bcopy(pth, mp->mnt_stat.f_mntonname, MNAMELEN); 724 nmp->nm_nam = nam; 725 726 /* Set up the sockets and per-host congestion */ 727 nmp->nm_sotype = argp->sotype; 728 nmp->nm_soproto = argp->proto; 729 730 nfs_decode_args(nmp, argp); 731 732 /* 733 * For Connection based sockets (TCP,...) defer the connect until 734 * the first request, in case the server is not responding. 735 */ 736 if (nmp->nm_sotype == SOCK_DGRAM && 737 (error = nfs_connect(nmp, (struct nfsreq *)0))) 738 goto bad; 739 740 /* 741 * This is silly, but it has to be set so that vinifod() works. 742 * We do not want to do an nfs_statfs() here since we can get 743 * stuck on a dead server and we are holding a lock on the mount 744 * point. 745 */ 746 mp->mnt_stat.f_iosize = NFS_MAXDGRAMDATA; 747 /* 748 * A reference count is needed on the nfsnode representing the 749 * remote root. If this object is not persistent, then backward 750 * traversals of the mount point (i.e. "..") will not work if 751 * the nfsnode gets flushed out of the cache. Ufs does not have 752 * this problem, because one can identify root inodes by their 753 * number == ROOTINO (2). 754 */ 755 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np); 756 if (error) 757 goto bad; 758 *vpp = NFSTOV(np); 759 VOP_GETATTR(*vpp, &attrs, curproc->p_ucred, curproc); /* XXX */ 760 761 return (0); 762 bad: 763 nfs_disconnect(nmp); 764 free((caddr_t)nmp, M_NFSMNT); 765 m_freem(nam); 766 return (error); 767 } 768 769 /* 770 * unmount system call 771 */ 772 int 773 nfs_unmount(mp, mntflags, p) 774 struct mount *mp; 775 int mntflags; 776 struct proc *p; 777 { 778 register struct nfsmount *nmp; 779 struct nfsnode *np; 780 struct vnode *vp; 781 int error, flags = 0; 782 783 if (mntflags & MNT_FORCE) 784 flags |= FORCECLOSE; 785 nmp = VFSTONFS(mp); 786 /* 787 * Goes something like this.. 788 * - Check for activity on the root vnode (other than ourselves). 789 * - Call vflush() to clear out vnodes for this file system, 790 * except for the root vnode. 791 * - Decrement reference on the vnode representing remote root. 792 * - Close the socket 793 * - Free up the data structures 794 */ 795 /* 796 * We need to decrement the ref. count on the nfsnode representing 797 * the remote root. See comment in mountnfs(). The VFS unmount() 798 * has done vput on this vnode, otherwise we would get deadlock! 799 */ 800 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np); 801 if (error) 802 return(error); 803 vp = NFSTOV(np); 804 if ((mntflags & MNT_FORCE) == 0 && vp->v_usecount > 2) { 805 vput(vp); 806 return (EBUSY); 807 } 808 809 /* 810 * Must handshake with nqnfs_clientd() if it is active. 811 */ 812 nmp->nm_flag |= NFSMNT_DISMINPROG; 813 while (nmp->nm_inprog != NULLVP) 814 (void) tsleep((caddr_t)&lbolt, PSOCK, "nfsdism", 0); 815 error = vflush(mp, vp, flags); 816 if (error) { 817 vput(vp); 818 nmp->nm_flag &= ~NFSMNT_DISMINPROG; 819 return (error); 820 } 821 822 /* 823 * We are now committed to the unmount. 824 * For NQNFS, let the server daemon free the nfsmount structure. 825 */ 826 if (nmp->nm_flag & (NFSMNT_NQNFS | NFSMNT_KERB)) 827 nmp->nm_flag |= NFSMNT_DISMNT; 828 829 /* 830 * There are two reference counts to get rid of here. 831 */ 832 vrele(vp); 833 vrele(vp); 834 vgone(vp); 835 nfs_disconnect(nmp); 836 m_freem(nmp->nm_nam); 837 838 if ((nmp->nm_flag & (NFSMNT_NQNFS | NFSMNT_KERB)) == 0) 839 free((caddr_t)nmp, M_NFSMNT); 840 return (0); 841 } 842 843 /* 844 * Return root of a filesystem 845 */ 846 int 847 nfs_root(mp, vpp) 848 struct mount *mp; 849 struct vnode **vpp; 850 { 851 register struct vnode *vp; 852 struct nfsmount *nmp; 853 struct nfsnode *np; 854 int error; 855 856 nmp = VFSTONFS(mp); 857 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np); 858 if (error) 859 return (error); 860 vp = NFSTOV(np); 861 if (vp->v_type == VNON) 862 vp->v_type = VDIR; 863 vp->v_flag = VROOT; 864 *vpp = vp; 865 return (0); 866 } 867 868 extern int syncprt; 869 870 /* 871 * Flush out the buffer cache 872 */ 873 /* ARGSUSED */ 874 int 875 nfs_sync(mp, waitfor, cred, p) 876 struct mount *mp; 877 int waitfor; 878 struct ucred *cred; 879 struct proc *p; 880 { 881 register struct vnode *vp; 882 int error, allerror = 0; 883 884 /* 885 * Force stale buffer cache information to be flushed. 886 */ 887 loop: 888 for (vp = mp->mnt_vnodelist.lh_first; 889 vp != NULL; 890 vp = vp->v_mntvnodes.le_next) { 891 /* 892 * If the vnode that we are about to sync is no longer 893 * associated with this mount point, start over. 894 */ 895 if (vp->v_mount != mp) 896 goto loop; 897 if (VOP_ISLOCKED(vp) || vp->v_dirtyblkhd.lh_first == NULL) 898 continue; 899 #ifdef Lite2_integrated 900 if (vget(vp, LK_EXCLUSIVE, p)) 901 #else 902 if (vget(vp, 1)) 903 #endif 904 goto loop; 905 error = VOP_FSYNC(vp, cred, waitfor, p); 906 if (error) 907 allerror = error; 908 vput(vp); 909 } 910 return (allerror); 911 } 912 913 /* 914 * NFS flat namespace lookup. 915 * Currently unsupported. 916 */ 917 /* ARGSUSED */ 918 int 919 nfs_vget(mp, ino, vpp) 920 struct mount *mp; 921 ino_t ino; 922 struct vnode **vpp; 923 { 924 925 return (EOPNOTSUPP); 926 } 927 928 #ifdef notyet 929 /* 930 * Do that sysctl thang... 931 */ 932 static int 933 nfs_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, void *newp, 934 size_t newlen, struct proc *p) 935 { 936 int rv; 937 938 /* 939 * All names at this level are terminal. 940 */ 941 if(namelen > 1) 942 return ENOTDIR; /* overloaded */ 943 944 switch(name[0]) { 945 case NFS_NFSSTATS: 946 if(!oldp) { 947 *oldlenp = sizeof nfsstats; 948 return 0; 949 } 950 951 if(*oldlenp < sizeof nfsstats) { 952 *oldlenp = sizeof nfsstats; 953 return ENOMEM; 954 } 955 956 rv = copyout(&nfsstats, oldp, sizeof nfsstats); 957 if(rv) return rv; 958 959 if(newp && newlen != sizeof nfsstats) 960 return EINVAL; 961 962 if(newp) { 963 return copyin(newp, &nfsstats, sizeof nfsstats); 964 } 965 return 0; 966 967 default: 968 return EOPNOTSUPP; 969 } 970 } 971 #endif 972 973 974 /* 975 * At this point, this should never happen 976 */ 977 /* ARGSUSED */ 978 int 979 nfs_fhtovp(mp, fhp, nam, vpp, exflagsp, credanonp) 980 register struct mount *mp; 981 struct fid *fhp; 982 struct mbuf *nam; 983 struct vnode **vpp; 984 int *exflagsp; 985 struct ucred **credanonp; 986 { 987 988 return (EINVAL); 989 } 990 991 /* 992 * Vnode pointer to File handle, should never happen either 993 */ 994 /* ARGSUSED */ 995 int 996 nfs_vptofh(vp, fhp) 997 struct vnode *vp; 998 struct fid *fhp; 999 { 1000 1001 return (EINVAL); 1002 } 1003 1004 /* 1005 * Vfs start routine, a no-op. 1006 */ 1007 /* ARGSUSED */ 1008 int 1009 nfs_start(mp, flags, p) 1010 struct mount *mp; 1011 int flags; 1012 struct proc *p; 1013 { 1014 1015 return (0); 1016 } 1017 1018 /* 1019 * Do operations associated with quotas, not supported 1020 */ 1021 /* ARGSUSED */ 1022 int 1023 nfs_quotactl(mp, cmd, uid, arg, p) 1024 struct mount *mp; 1025 int cmd; 1026 uid_t uid; 1027 caddr_t arg; 1028 struct proc *p; 1029 { 1030 1031 return (EOPNOTSUPP); 1032 } 1033
Indexes created Tue Sep 23 22:09:46 GMT 2025