nfs_vfsops.c revision 1.67
1 /* $NetBSD: nfs_vfsops.c,v 1.67 1998/01/30 22:44:15 fvdl 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 nfs_mount_diskless __P((struct nfs_dlmount *, const char *, 106 struct mount **, struct vnode **, struct proc *)); 107 108 #define TRUE 1 109 #define FALSE 0 110 111 /* 112 * nfs statfs call 113 */ 114 int 115 nfs_statfs(mp, sbp, p) 116 struct mount *mp; 117 register struct statfs *sbp; 118 struct proc *p; 119 { 120 register struct vnode *vp; 121 register struct nfs_statfs *sfp; 122 register caddr_t cp; 123 register u_int32_t *tl; 124 register int32_t t1, t2; 125 caddr_t bpos, dpos, cp2; 126 struct nfsmount *nmp = VFSTONFS(mp); 127 int error = 0, v3 = (nmp->nm_flag & NFSMNT_NFSV3), retattr; 128 struct mbuf *mreq, *mrep = NULL, *md, *mb, *mb2; 129 struct ucred *cred; 130 struct nfsnode *np; 131 u_quad_t tquad; 132 133 #ifndef nolint 134 sfp = (struct nfs_statfs *)0; 135 #endif 136 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np); 137 if (error) 138 return (error); 139 vp = NFSTOV(np); 140 cred = crget(); 141 cred->cr_ngroups = 0; 142 if (v3 && (nmp->nm_iflag & NFSMNT_GOTFSINFO) == 0) 143 (void)nfs_fsinfo(nmp, vp, cred, p); 144 nfsstats.rpccnt[NFSPROC_FSSTAT]++; 145 nfsm_reqhead(vp, NFSPROC_FSSTAT, NFSX_FH(v3)); 146 nfsm_fhtom(vp, v3); 147 nfsm_request(vp, NFSPROC_FSSTAT, p, cred); 148 if (v3) 149 nfsm_postop_attr(vp, retattr); 150 if (error) { 151 if (mrep != NULL) 152 m_free(mrep); 153 goto nfsmout; 154 } 155 nfsm_dissect(sfp, struct nfs_statfs *, NFSX_STATFS(v3)); 156 #ifdef COMPAT_09 157 sbp->f_type = 2; 158 #else 159 sbp->f_type = 0; 160 #endif 161 sbp->f_flags = nmp->nm_flag; 162 sbp->f_iosize = min(nmp->nm_rsize, nmp->nm_wsize); 163 if (v3) { 164 sbp->f_bsize = NFS_FABLKSIZE; 165 fxdr_hyper(&sfp->sf_tbytes, &tquad); 166 sbp->f_blocks = (long)(tquad / ((u_quad_t)NFS_FABLKSIZE)); 167 fxdr_hyper(&sfp->sf_fbytes, &tquad); 168 sbp->f_bfree = (long)(tquad / ((u_quad_t)NFS_FABLKSIZE)); 169 fxdr_hyper(&sfp->sf_abytes, &tquad); 170 sbp->f_bavail = (long)(tquad / ((u_quad_t)NFS_FABLKSIZE)); 171 sbp->f_files = (fxdr_unsigned(int32_t, 172 sfp->sf_tfiles.nfsuquad[1]) & 0x7fffffff); 173 sbp->f_ffree = (fxdr_unsigned(int32_t, 174 sfp->sf_ffiles.nfsuquad[1]) & 0x7fffffff); 175 } else { 176 sbp->f_bsize = fxdr_unsigned(int32_t, sfp->sf_bsize); 177 sbp->f_blocks = fxdr_unsigned(int32_t, sfp->sf_blocks); 178 sbp->f_bfree = fxdr_unsigned(int32_t, sfp->sf_bfree); 179 sbp->f_bavail = fxdr_unsigned(int32_t, sfp->sf_bavail); 180 sbp->f_files = 0; 181 sbp->f_ffree = 0; 182 } 183 if (sbp != &mp->mnt_stat) { 184 bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN); 185 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); 186 } 187 strncpy(&sbp->f_fstypename[0], mp->mnt_op->vfs_name, MFSNAMELEN); 188 nfsm_reqdone; 189 vrele(vp); 190 crfree(cred); 191 return (error); 192 } 193 194 /* 195 * nfs version 3 fsinfo rpc call 196 */ 197 int 198 nfs_fsinfo(nmp, vp, cred, p) 199 register struct nfsmount *nmp; 200 register struct vnode *vp; 201 struct ucred *cred; 202 struct proc *p; 203 { 204 register struct nfsv3_fsinfo *fsp; 205 register caddr_t cp; 206 register int32_t t1, t2; 207 register u_int32_t *tl, pref, max; 208 caddr_t bpos, dpos, cp2; 209 int error = 0, retattr; 210 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 211 u_int64_t maxfsize; 212 213 nfsstats.rpccnt[NFSPROC_FSINFO]++; 214 nfsm_reqhead(vp, NFSPROC_FSINFO, NFSX_FH(1)); 215 nfsm_fhtom(vp, 1); 216 nfsm_request(vp, NFSPROC_FSINFO, p, cred); 217 nfsm_postop_attr(vp, retattr); 218 if (!error) { 219 nfsm_dissect(fsp, struct nfsv3_fsinfo *, NFSX_V3FSINFO); 220 pref = fxdr_unsigned(u_int32_t, fsp->fs_wtpref); 221 if (pref < nmp->nm_wsize && pref >= NFS_FABLKSIZE) 222 nmp->nm_wsize = (pref + NFS_FABLKSIZE - 1) & 223 ~(NFS_FABLKSIZE - 1); 224 max = fxdr_unsigned(u_int32_t, fsp->fs_wtmax); 225 if (max < nmp->nm_wsize && max > 0) { 226 nmp->nm_wsize = max & ~(NFS_FABLKSIZE - 1); 227 if (nmp->nm_wsize == 0) 228 nmp->nm_wsize = max; 229 } 230 pref = fxdr_unsigned(u_int32_t, fsp->fs_rtpref); 231 if (pref < nmp->nm_rsize && pref >= NFS_FABLKSIZE) 232 nmp->nm_rsize = (pref + NFS_FABLKSIZE - 1) & 233 ~(NFS_FABLKSIZE - 1); 234 max = fxdr_unsigned(u_int32_t, fsp->fs_rtmax); 235 if (max < nmp->nm_rsize && max > 0) { 236 nmp->nm_rsize = max & ~(NFS_FABLKSIZE - 1); 237 if (nmp->nm_rsize == 0) 238 nmp->nm_rsize = max; 239 } 240 pref = fxdr_unsigned(u_int32_t, fsp->fs_dtpref); 241 if (pref < nmp->nm_readdirsize && pref >= NFS_DIRFRAGSIZ) 242 nmp->nm_readdirsize = (pref + NFS_DIRFRAGSIZ - 1) & 243 ~(NFS_DIRFRAGSIZ - 1); 244 if (max < nmp->nm_readdirsize && max > 0) { 245 nmp->nm_readdirsize = max & ~(NFS_DIRFRAGSIZ - 1); 246 if (nmp->nm_readdirsize == 0) 247 nmp->nm_readdirsize = max; 248 } 249 /* XXX */ 250 nmp->nm_maxfilesize = (u_int64_t)0x80000000 * DEV_BSIZE - 1; 251 fxdr_hyper(&fsp->fs_maxfilesize, &maxfsize); 252 if (maxfsize > 0 && maxfsize < nmp->nm_maxfilesize) 253 nmp->nm_maxfilesize = maxfsize; 254 nmp->nm_iflag |= NFSMNT_GOTFSINFO; 255 } 256 nfsm_reqdone; 257 return (error); 258 } 259 260 /* 261 * Mount a remote root fs via. NFS. It goes like this: 262 * - Call nfs_boot_init() to fill in the nfs_diskless struct 263 * - build the rootfs mount point and call mountnfs() to do the rest. 264 */ 265 int 266 nfs_mountroot() 267 { 268 struct nfs_diskless *nd; 269 struct vattr attr; 270 struct mount *mp; 271 struct vnode *vp; 272 struct proc *procp; 273 long n; 274 int error; 275 276 procp = curproc; /* XXX */ 277 278 if (root_device->dv_class != DV_IFNET) 279 return (ENODEV); 280 281 /* 282 * XXX time must be non-zero when we init the interface or else 283 * the arp code will wedge. [Fixed now in if_ether.c] 284 * However, the NFS attribute cache gives false "hits" when 285 * time.tv_sec < NFS_ATTRTIMEO(np) so keep this in for now. 286 */ 287 if (time.tv_sec < NFS_MAXATTRTIMO) 288 time.tv_sec = NFS_MAXATTRTIMO; 289 290 /* 291 * Call nfs_boot_init() to fill in the nfs_diskless struct. 292 * Side effect: Finds and configures a network interface. 293 */ 294 nd = malloc(sizeof(*nd), M_NFSMNT, M_WAITOK); 295 bzero((caddr_t)nd, sizeof(*nd)); 296 error = nfs_boot_init(nd, procp); 297 if (error) 298 goto out; 299 300 /* 301 * Create the root mount point. 302 */ 303 error = nfs_mount_diskless(&nd->nd_root, "/", &mp, &vp, procp); 304 if (error) 305 goto out; 306 printf("root on %s\n", nd->nd_root.ndm_host); 307 308 /* 309 * Link it into the mount list. 310 */ 311 #ifdef Lite2_integrated 312 simple_lock(&mountlist_slock); 313 CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list); 314 simple_unlock(&mountlist_slock); 315 rootvp = vp; 316 vfs_unbusy(mp, procp); 317 #else 318 if (vfs_lock(mp)) 319 panic("nfs_mountroot: vfs_lock"); 320 CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list); 321 mp->mnt_vnodecovered = NULLVP; 322 vfs_unlock(mp); 323 rootvp = vp; 324 #endif 325 326 /* Get root attributes (for the time). */ 327 error = VOP_GETATTR(vp, &attr, procp->p_ucred, procp); 328 if (error) 329 panic("nfs_mountroot: getattr for root"); 330 n = attr.va_mtime.tv_sec; 331 #ifdef DEBUG 332 printf("root time: 0x%lx\n", n); 333 #endif 334 inittodr(n); 335 336 #if 0 337 /* 338 * XXX splnet, so networks will receive... 339 * XXX Which port needed this hack? 340 * XXX Should already be at spl0. 341 */ 342 splnet(); 343 #endif 344 345 #if 0 /* swap now comes in from swapctl(2) */ 346 #ifdef notyet 347 /* Set up swap credentials. */ 348 proc0.p_ucred->cr_uid = 0; 349 proc0.p_ucred->cr_gid = 0; 350 proc0.p_ucred->cr_ngroups = 0; 351 #endif 352 353 /* 354 * "Mount" the swap device. 355 * 356 * On a "dataless" configuration (swap on disk) we will have: 357 * (swdevt[0].sw_dev != NODEV) identifying the swap device. 358 */ 359 if (bdevvp(swapdev, &swapdev_vp)) 360 panic("nfs_mountroot: can't setup swap vp"); 361 if (swdevt[0].sw_dev != NODEV) { 362 printf("swap on device 0x%x\n", swdevt[0].sw_dev); 363 error = 0; 364 goto out; 365 } 366 367 /* 368 * If swapping to an nfs node: (swdevt[0].sw_dev == NODEV) 369 * Create a fake mount point just for the swap vnode so that the 370 * swap file can be on a different server from the rootfs. 371 */ 372 error = nfs_mount_diskless(&nd->nd_swap, "/swap", &mp, &vp, procp); 373 if (error) { 374 printf("nfs_boot: warning: mount(swap), error=%d\n", error); 375 error = 0; 376 goto out; 377 } 378 #ifdef Lite2_integrated 379 vfs_unbusy(mp, procp); 380 #endif 381 printf("swap on %s\n", nd->nd_swap.ndm_host); 382 383 /* 384 * Since the swap file is not the root dir of a file system, 385 * hack it to a regular file. 386 */ 387 vp->v_type = VREG; 388 vp->v_flag = 0; 389 swdevt[0].sw_vp = vp; 390 391 /* 392 * Find out how large the swap file is. 393 */ 394 error = VOP_GETATTR(vp, &attr, procp->p_ucred, procp); 395 if (error) 396 panic("nfs_mountroot: getattr for swap"); 397 n = (long) (attr.va_size >> DEV_BSHIFT); 398 #ifdef DEBUG 399 printf("swap size: 0x%lx (blocks)\n", n); 400 #endif 401 swdevt[0].sw_nblks = n; 402 #endif 403 404 out: 405 free(nd, M_NFSMNT); 406 return (error); 407 } 408 409 /* 410 * Internal version of mount system call for diskless setup. 411 * Separate function because we used to call it twice. 412 * (once for root and once for swap) 413 */ 414 static int 415 nfs_mount_diskless(ndmntp, mntname, mpp, vpp, p) 416 struct nfs_dlmount *ndmntp; 417 const char *mntname; /* mount point name */ 418 struct mount **mpp; 419 struct vnode **vpp; 420 struct proc *p; 421 { 422 struct mount *mp; 423 struct mbuf *m; 424 int error; 425 426 #ifdef Lite2_integrated 427 vfs_rootmountalloc("nfs", mntname, &mp); 428 #else 429 /* Create the mount point. */ 430 mp = (struct mount *)malloc((u_long)sizeof(struct mount), 431 M_MOUNT, M_WAITOK); 432 bzero((char *)mp, (u_long)sizeof(struct mount)); 433 #endif 434 mp->mnt_op = &nfs_vfsops; 435 /* mp->mnt_flag = 0 */ 436 437 /* Get mbuf for server sockaddr. */ 438 m = m_get(M_WAIT, MT_SONAME); 439 if (m == NULL) 440 panic("nfs_mountroot: mget soname for %s", mntname); 441 bcopy((caddr_t)ndmntp->ndm_args.addr, mtod(m, caddr_t), 442 (m->m_len = ndmntp->ndm_args.addr->sa_len)); 443 444 error = mountnfs(&ndmntp->ndm_args, mp, m, mntname, 445 ndmntp->ndm_args.hostname, vpp, p); 446 if (error) { 447 printf("nfs_mountroot: mount %s failed: %d\n", 448 mntname, error); 449 free(mp, M_MOUNT); 450 } else 451 *mpp = mp; 452 453 return (error); 454 } 455 456 void 457 nfs_decode_args(nmp, argp) 458 struct nfsmount *nmp; 459 struct nfs_args *argp; 460 { 461 int s; 462 int adjsock; 463 int maxio; 464 465 s = splsoftnet(); 466 467 /* 468 * Silently clear NFSMNT_NOCONN if it's a TCP mount, it makes 469 * no sense in that context. 470 */ 471 if (argp->sotype == SOCK_STREAM) 472 argp->flags &= ~NFSMNT_NOCONN; 473 474 /* 475 * Cookie translation is not needed for v2, silently ignore it. 476 */ 477 if ((argp->flags & (NFSMNT_XLATECOOKIE|NFSMNT_NFSV3)) == 478 NFSMNT_XLATECOOKIE) 479 argp->flags &= ~NFSMNT_XLATECOOKIE; 480 481 /* Re-bind if rsrvd port requested and wasn't on one */ 482 adjsock = !(nmp->nm_flag & NFSMNT_RESVPORT) 483 && (argp->flags & NFSMNT_RESVPORT); 484 /* Also re-bind if we're switching to/from a connected UDP socket */ 485 adjsock |= ((nmp->nm_flag & NFSMNT_NOCONN) != 486 (argp->flags & NFSMNT_NOCONN)); 487 488 /* Update flags atomically. Don't change the lock bits. */ 489 nmp->nm_flag = argp->flags | nmp->nm_flag; 490 splx(s); 491 492 if ((argp->flags & NFSMNT_TIMEO) && argp->timeo > 0) { 493 nmp->nm_timeo = (argp->timeo * NFS_HZ + 5) / 10; 494 if (nmp->nm_timeo < NFS_MINTIMEO) 495 nmp->nm_timeo = NFS_MINTIMEO; 496 else if (nmp->nm_timeo > NFS_MAXTIMEO) 497 nmp->nm_timeo = NFS_MAXTIMEO; 498 } 499 500 if ((argp->flags & NFSMNT_RETRANS) && argp->retrans > 1) { 501 nmp->nm_retry = argp->retrans; 502 if (nmp->nm_retry > NFS_MAXREXMIT) 503 nmp->nm_retry = NFS_MAXREXMIT; 504 } 505 506 if (argp->flags & NFSMNT_NFSV3) { 507 if (argp->sotype == SOCK_DGRAM) 508 maxio = NFS_MAXDGRAMDATA; 509 else 510 maxio = NFS_MAXDATA; 511 } else 512 maxio = NFS_V2MAXDATA; 513 514 if ((argp->flags & NFSMNT_WSIZE) && argp->wsize > 0) { 515 int osize = nmp->nm_wsize; 516 nmp->nm_wsize = argp->wsize; 517 /* Round down to multiple of blocksize */ 518 nmp->nm_wsize &= ~(NFS_FABLKSIZE - 1); 519 if (nmp->nm_wsize <= 0) 520 nmp->nm_wsize = NFS_FABLKSIZE; 521 adjsock |= (nmp->nm_wsize != osize); 522 } 523 if (nmp->nm_wsize > maxio) 524 nmp->nm_wsize = maxio; 525 if (nmp->nm_wsize > MAXBSIZE) 526 nmp->nm_wsize = MAXBSIZE; 527 528 if ((argp->flags & NFSMNT_RSIZE) && argp->rsize > 0) { 529 int osize = nmp->nm_rsize; 530 nmp->nm_rsize = argp->rsize; 531 /* Round down to multiple of blocksize */ 532 nmp->nm_rsize &= ~(NFS_FABLKSIZE - 1); 533 if (nmp->nm_rsize <= 0) 534 nmp->nm_rsize = NFS_FABLKSIZE; 535 adjsock |= (nmp->nm_rsize != osize); 536 } 537 if (nmp->nm_rsize > maxio) 538 nmp->nm_rsize = maxio; 539 if (nmp->nm_rsize > MAXBSIZE) 540 nmp->nm_rsize = MAXBSIZE; 541 542 if ((argp->flags & NFSMNT_READDIRSIZE) && argp->readdirsize > 0) { 543 nmp->nm_readdirsize = argp->readdirsize; 544 /* Round down to multiple of minimum blocksize */ 545 nmp->nm_readdirsize &= ~(NFS_DIRFRAGSIZ - 1); 546 if (nmp->nm_readdirsize < NFS_DIRFRAGSIZ) 547 nmp->nm_readdirsize = NFS_DIRFRAGSIZ; 548 /* Bigger than buffer size makes no sense */ 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_safedisconnect(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, or change cookie translation 625 */ 626 args.flags = (args.flags & 627 ~(NFSMNT_NFSV3|NFSMNT_NQNFS|NFSMNT_XLATECOOKIE)) | 628 (nmp->nm_flag & 629 (NFSMNT_NFSV3|NFSMNT_NQNFS|NFSMNT_XLATECOOKIE)); 630 nfs_decode_args(nmp, &args); 631 return (0); 632 } 633 error = copyin((caddr_t)args.fh, (caddr_t)nfh, args.fhsize); 634 if (error) 635 return (error); 636 error = copyinstr(path, pth, MNAMELEN-1, &len); 637 if (error) 638 return (error); 639 bzero(&pth[len], MNAMELEN - len); 640 error = copyinstr(args.hostname, hst, MNAMELEN-1, &len); 641 if (error) 642 return (error); 643 bzero(&hst[len], MNAMELEN - len); 644 /* sockargs() call must be after above copyin() calls */ 645 error = sockargs(&nam, (caddr_t)args.addr, args.addrlen, MT_SONAME); 646 if (error) 647 return (error); 648 args.fh = nfh; 649 error = mountnfs(&args, mp, nam, pth, hst, &vp, p); 650 return (error); 651 } 652 653 /* 654 * Common code for mount and mountroot 655 */ 656 int 657 mountnfs(argp, mp, nam, pth, hst, vpp, p) 658 register struct nfs_args *argp; 659 register struct mount *mp; 660 struct mbuf *nam; 661 const char *pth, *hst; 662 struct vnode **vpp; 663 struct proc *p; 664 { 665 register struct nfsmount *nmp; 666 struct nfsnode *np; 667 int error; 668 struct vattr attrs; 669 struct ucred *cr; 670 671 if (mp->mnt_flag & MNT_UPDATE) { 672 nmp = VFSTONFS(mp); 673 /* update paths, file handles, etc, here XXX */ 674 m_freem(nam); 675 return (0); 676 } else { 677 MALLOC(nmp, struct nfsmount *, sizeof (struct nfsmount), 678 M_NFSMNT, M_WAITOK); 679 bzero((caddr_t)nmp, sizeof (struct nfsmount)); 680 mp->mnt_data = (qaddr_t)nmp; 681 TAILQ_INIT(&nmp->nm_uidlruhead); 682 TAILQ_INIT(&nmp->nm_bufq); 683 } 684 #ifdef Lite2_integrated 685 vfs_getnewfsid(mp, makefstype(MOUNT_NFS)); 686 #else 687 getnewfsid(mp, makefstype(MOUNT_NFS)); 688 #endif 689 nmp->nm_mountp = mp; 690 691 if (argp->flags & NFSMNT_NQNFS) 692 /* 693 * We have to set mnt_maxsymlink to a non-zero value so 694 * that COMPAT_43 routines will know that we are setting 695 * the d_type field in directories (and can zero it for 696 * unsuspecting binaries). 697 */ 698 mp->mnt_maxsymlinklen = 1; 699 700 if ((argp->flags & NFSMNT_NFSV3) == 0) 701 /* 702 * V2 can only handle 32 bit filesizes. For v3, nfs_fsinfo 703 * will fill this in. 704 */ 705 nmp->nm_maxfilesize = 0xffffffffLL; 706 707 nmp->nm_timeo = NFS_TIMEO; 708 nmp->nm_retry = NFS_RETRANS; 709 nmp->nm_wsize = NFS_WSIZE; 710 nmp->nm_rsize = NFS_RSIZE; 711 nmp->nm_readdirsize = NFS_READDIRSIZE; 712 nmp->nm_numgrps = NFS_MAXGRPS; 713 nmp->nm_readahead = NFS_DEFRAHEAD; 714 nmp->nm_leaseterm = NQ_DEFLEASE; 715 nmp->nm_deadthresh = NQ_DEADTHRESH; 716 CIRCLEQ_INIT(&nmp->nm_timerhead); 717 nmp->nm_inprog = NULLVP; 718 nmp->nm_fhsize = argp->fhsize; 719 bcopy((caddr_t)argp->fh, (caddr_t)nmp->nm_fh, argp->fhsize); 720 #ifdef COMPAT_09 721 mp->mnt_stat.f_type = 2; 722 #else 723 mp->mnt_stat.f_type = 0; 724 #endif 725 strncpy(&mp->mnt_stat.f_fstypename[0], mp->mnt_op->vfs_name, MFSNAMELEN); 726 bcopy(hst, mp->mnt_stat.f_mntfromname, MNAMELEN); 727 bcopy(pth, mp->mnt_stat.f_mntonname, MNAMELEN); 728 nmp->nm_nam = nam; 729 730 /* Set up the sockets and per-host congestion */ 731 nmp->nm_sotype = argp->sotype; 732 nmp->nm_soproto = argp->proto; 733 734 nfs_decode_args(nmp, argp); 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 /* 752 * A reference count is needed on the nfsnode representing the 753 * remote root. If this object is not persistent, then backward 754 * traversals of the mount point (i.e. "..") will not work if 755 * the nfsnode gets flushed out of the cache. Ufs does not have 756 * this problem, because one can identify root inodes by their 757 * number == ROOTINO (2). 758 */ 759 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np); 760 if (error) 761 goto bad; 762 *vpp = NFSTOV(np); 763 VOP_GETATTR(*vpp, &attrs, p->p_ucred, p); 764 if (nmp->nm_flag & NFSMNT_NFSV3) { 765 cr = crget(); 766 cr->cr_uid = attrs.va_uid; 767 cr->cr_gid = attrs.va_gid; 768 cr->cr_ngroups = 0; 769 nfs_cookieheuristic(*vpp, &nmp->nm_iflag, p, cr); 770 crfree(cr); 771 } 772 773 return (0); 774 bad: 775 nfs_disconnect(nmp); 776 free((caddr_t)nmp, M_NFSMNT); 777 m_freem(nam); 778 return (error); 779 } 780 781 /* 782 * unmount system call 783 */ 784 int 785 nfs_unmount(mp, mntflags, p) 786 struct mount *mp; 787 int mntflags; 788 struct proc *p; 789 { 790 register struct nfsmount *nmp; 791 struct nfsnode *np; 792 struct vnode *vp; 793 int error, flags = 0; 794 795 if (mntflags & MNT_FORCE) 796 flags |= FORCECLOSE; 797 nmp = VFSTONFS(mp); 798 /* 799 * Goes something like this.. 800 * - Check for activity on the root vnode (other than ourselves). 801 * - Call vflush() to clear out vnodes for this file system, 802 * except for the root vnode. 803 * - Decrement reference on the vnode representing remote root. 804 * - Close the socket 805 * - Free up the data structures 806 */ 807 /* 808 * We need to decrement the ref. count on the nfsnode representing 809 * the remote root. See comment in mountnfs(). The VFS unmount() 810 * has done vput on this vnode, otherwise we would get deadlock! 811 */ 812 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np); 813 if (error) 814 return(error); 815 vp = NFSTOV(np); 816 if ((mntflags & MNT_FORCE) == 0 && vp->v_usecount > 2) { 817 vput(vp); 818 return (EBUSY); 819 } 820 821 /* 822 * Must handshake with nqnfs_clientd() if it is active. 823 */ 824 nmp->nm_iflag |= NFSMNT_DISMINPROG; 825 while (nmp->nm_inprog != NULLVP) 826 (void) tsleep((caddr_t)&lbolt, PSOCK, "nfsdism", 0); 827 error = vflush(mp, vp, flags); 828 if (error) { 829 vput(vp); 830 nmp->nm_iflag &= ~NFSMNT_DISMINPROG; 831 return (error); 832 } 833 834 /* 835 * We are now committed to the unmount. 836 * For NQNFS, let the server daemon free the nfsmount structure. 837 */ 838 if (nmp->nm_flag & (NFSMNT_NQNFS | NFSMNT_KERB)) 839 nmp->nm_iflag |= NFSMNT_DISMNT; 840 841 /* 842 * There are two reference counts to get rid of here. 843 */ 844 vrele(vp); 845 vrele(vp); 846 vgone(vp); 847 nfs_disconnect(nmp); 848 m_freem(nmp->nm_nam); 849 850 if ((nmp->nm_flag & (NFSMNT_NQNFS | NFSMNT_KERB)) == 0) 851 free((caddr_t)nmp, M_NFSMNT); 852 return (0); 853 } 854 855 /* 856 * Return root of a filesystem 857 */ 858 int 859 nfs_root(mp, vpp) 860 struct mount *mp; 861 struct vnode **vpp; 862 { 863 register struct vnode *vp; 864 struct nfsmount *nmp; 865 struct nfsnode *np; 866 int error; 867 868 nmp = VFSTONFS(mp); 869 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np); 870 if (error) 871 return (error); 872 vp = NFSTOV(np); 873 if (vp->v_type == VNON) 874 vp->v_type = VDIR; 875 vp->v_flag = VROOT; 876 *vpp = vp; 877 return (0); 878 } 879 880 extern int syncprt; 881 882 /* 883 * Flush out the buffer cache 884 */ 885 /* ARGSUSED */ 886 int 887 nfs_sync(mp, waitfor, cred, p) 888 struct mount *mp; 889 int waitfor; 890 struct ucred *cred; 891 struct proc *p; 892 { 893 register struct vnode *vp; 894 int error, allerror = 0; 895 896 /* 897 * Force stale buffer cache information to be flushed. 898 */ 899 loop: 900 for (vp = mp->mnt_vnodelist.lh_first; 901 vp != NULL; 902 vp = vp->v_mntvnodes.le_next) { 903 /* 904 * If the vnode that we are about to sync is no longer 905 * associated with this mount point, start over. 906 */ 907 if (vp->v_mount != mp) 908 goto loop; 909 if (VOP_ISLOCKED(vp) || vp->v_dirtyblkhd.lh_first == NULL) 910 continue; 911 #ifdef Lite2_integrated 912 if (vget(vp, LK_EXCLUSIVE, p)) 913 #else 914 if (vget(vp, 1)) 915 #endif 916 goto loop; 917 error = VOP_FSYNC(vp, cred, waitfor, p); 918 if (error) 919 allerror = error; 920 vput(vp); 921 } 922 return (allerror); 923 } 924 925 /* 926 * NFS flat namespace lookup. 927 * Currently unsupported. 928 */ 929 /* ARGSUSED */ 930 int 931 nfs_vget(mp, ino, vpp) 932 struct mount *mp; 933 ino_t ino; 934 struct vnode **vpp; 935 { 936 937 return (EOPNOTSUPP); 938 } 939 940 #ifdef notyet 941 /* 942 * Do that sysctl thang... 943 */ 944 static int 945 nfs_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, void *newp, 946 size_t newlen, struct proc *p) 947 { 948 int rv; 949 950 /* 951 * All names at this level are terminal. 952 */ 953 if(namelen > 1) 954 return ENOTDIR; /* overloaded */ 955 956 switch(name[0]) { 957 case NFS_NFSSTATS: 958 if(!oldp) { 959 *oldlenp = sizeof nfsstats; 960 return 0; 961 } 962 963 if(*oldlenp < sizeof nfsstats) { 964 *oldlenp = sizeof nfsstats; 965 return ENOMEM; 966 } 967 968 rv = copyout(&nfsstats, oldp, sizeof nfsstats); 969 if(rv) return rv; 970 971 if(newp && newlen != sizeof nfsstats) 972 return EINVAL; 973 974 if(newp) { 975 return copyin(newp, &nfsstats, sizeof nfsstats); 976 } 977 return 0; 978 979 default: 980 return EOPNOTSUPP; 981 } 982 } 983 #endif 984 985 986 /* 987 * At this point, this should never happen 988 */ 989 /* ARGSUSED */ 990 int 991 nfs_fhtovp(mp, fhp, nam, vpp, exflagsp, credanonp) 992 register struct mount *mp; 993 struct fid *fhp; 994 struct mbuf *nam; 995 struct vnode **vpp; 996 int *exflagsp; 997 struct ucred **credanonp; 998 { 999 1000 return (EINVAL); 1001 } 1002 1003 /* 1004 * Vnode pointer to File handle, should never happen either 1005 */ 1006 /* ARGSUSED */ 1007 int 1008 nfs_vptofh(vp, fhp) 1009 struct vnode *vp; 1010 struct fid *fhp; 1011 { 1012 1013 return (EINVAL); 1014 } 1015 1016 /* 1017 * Vfs start routine, a no-op. 1018 */ 1019 /* ARGSUSED */ 1020 int 1021 nfs_start(mp, flags, p) 1022 struct mount *mp; 1023 int flags; 1024 struct proc *p; 1025 { 1026 1027 return (0); 1028 } 1029 1030 /* 1031 * Do operations associated with quotas, not supported 1032 */ 1033 /* ARGSUSED */ 1034 int 1035 nfs_quotactl(mp, cmd, uid, arg, p) 1036 struct mount *mp; 1037 int cmd; 1038 uid_t uid; 1039 caddr_t arg; 1040 struct proc *p; 1041 { 1042 1043 return (EOPNOTSUPP); 1044 } 1045
Indexes created Fri Sep 26 20:09:58 GMT 2025