nfs_vfsops.c revision 1.61
1 /* $NetBSD: nfs_vfsops.c,v 1.61 1997/07/17 23:54:31 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 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 bzero((caddr_t) &nd, sizeof(nd)); 296 error = nfs_boot_init(&nd, procp); 297 if (error) 298 return (error); 299 300 /* 301 * Create the root mount point. 302 */ 303 error = nfs_boot_getfh(&nd.nd_root); 304 if (error) 305 return (error); 306 error = nfs_mount_diskless(&nd.nd_root, "/", &mp, &vp); 307 if (error) 308 return (error); 309 printf("root on %s\n", nd.nd_root.ndm_host); 310 311 /* 312 * Link it into the mount list. 313 */ 314 #ifdef Lite2_integrated 315 simple_lock(&mountlist_slock); 316 CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list); 317 simple_unlock(&mountlist_slock); 318 rootvp = vp; 319 vfs_unbusy(mp, procp); 320 #else 321 if (vfs_lock(mp)) 322 panic("nfs_mountroot: vfs_lock"); 323 CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list); 324 mp->mnt_vnodecovered = NULLVP; 325 vfs_unlock(mp); 326 rootvp = vp; 327 #endif 328 329 /* Get root attributes (for the time). */ 330 error = VOP_GETATTR(vp, &attr, procp->p_ucred, procp); 331 if (error) 332 panic("nfs_mountroot: getattr for root"); 333 n = attr.va_mtime.tv_sec; 334 #ifdef DEBUG 335 printf("root time: 0x%lx\n", n); 336 #endif 337 inittodr(n); 338 339 #if 0 340 /* 341 * XXX splnet, so networks will receive... 342 * XXX What system needed this hack? 343 * XXX Should already be at spl0. 344 */ 345 splnet(); 346 #endif 347 348 #ifdef notyet 349 /* Set up swap credentials. */ 350 proc0.p_ucred->cr_uid = ntohl(nd.swap_ucred.cr_uid); 351 proc0.p_ucred->cr_gid = ntohl(nd.swap_ucred.cr_gid); 352 if ((proc0.p_ucred->cr_ngroups = ntohs(nd.swap_ucred.cr_ngroups)) > 353 NGROUPS) 354 proc0.p_ucred->cr_ngroups = NGROUPS; 355 for (i = 0; i < proc0.p_ucred->cr_ngroups; i++) 356 proc0.p_ucred->cr_groups[i] = ntohl(nd.swap_ucred.cr_groups[i]); 357 #endif 358 359 /* swap from outside now */ 360 #if 0 361 * "Mount" the swap device. 362 * 363 * On a "dataless" configuration (swap on disk) we will have: 364 * (swdevt[0].sw_dev != NODEV) identifying the swap device. 365 */ 366 if (bdevvp(swapdev, &swapdev_vp)) 367 panic("nfs_mountroot: can't setup swap vp"); 368 if (swdevt[0].sw_dev != NODEV) { 369 printf("swap on device 0x%x\n", swdevt[0].sw_dev); 370 return (0); 371 } 372 373 /* 374 * If swapping to an nfs node: (swdevt[0].sw_dev == NODEV) 375 * Create a fake mount point just for the swap vnode so that the 376 * swap file can be on a different server from the rootfs. 377 */ 378 if ((error = nfs_boot_getfh(&nd.nd_swap)) != 0) { 379 printf("nfs_boot: warning: getfh(swap), error=%d\n", error); 380 return (0); 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 return (0); 386 } 387 #ifdef Lite2_integrated 388 vfs_unbusy(mp, procp); 389 #endif 390 printf("swap on %s\n", nd.nd_swap.ndm_host); 391 392 /* 393 * Since the swap file is not the root dir of a file system, 394 * hack it to a regular file. 395 */ 396 vp->v_type = VREG; 397 vp->v_flag = 0; 398 swdevt[0].sw_vp = vp; 399 400 /* 401 * Find out how large the swap file is. 402 */ 403 error = VOP_GETATTR(vp, &attr, procp->p_ucred, procp); 404 if (error) 405 panic("nfs_mountroot: getattr for swap"); 406 n = (long) (attr.va_size >> DEV_BSHIFT); 407 #ifdef DEBUG 408 printf("swap size: 0x%lx (blocks)\n", n); 409 #endif 410 swdevt[0].sw_nblks = n; 411 #endif 412 413 return (0); 414 } 415 416 /* 417 * Internal version of mount system call for diskless setup. 418 */ 419 static int 420 nfs_mount_diskless(ndmntp, mntname, mpp, vpp) 421 struct nfs_dlmount *ndmntp; 422 const char *mntname; /* mount point name */ 423 struct mount **mpp; 424 struct vnode **vpp; 425 { 426 struct mount *mp; 427 struct mbuf *m; 428 int error; 429 430 #ifdef Lite2_integrated 431 vfs_rootmountalloc("nfs", mntname, &mp); 432 #else 433 /* Create the mount point. */ 434 mp = (struct mount *)malloc((u_long)sizeof(struct mount), 435 M_MOUNT, M_WAITOK); 436 bzero((char *)mp, (u_long)sizeof(struct mount)); 437 #endif 438 mp->mnt_op = &nfs_vfsops; 439 /* mp->mnt_flag = 0 */ 440 441 /* Get mbuf for server sockaddr. */ 442 m = m_get(M_WAIT, MT_SONAME); 443 if (m == NULL) 444 panic("nfs_mountroot: mget soname for %s", mntname); 445 bcopy((caddr_t)ndmntp->ndm_args.addr, mtod(m, caddr_t), 446 (m->m_len = ndmntp->ndm_args.addr->sa_len)); 447 448 error = mountnfs(&ndmntp->ndm_args, mp, m, mntname, 449 ndmntp->ndm_args.hostname, vpp); 450 if (error) { 451 printf("nfs_mountroot: mount %s failed: %d\n", 452 mntname, error); 453 free(mp, M_MOUNT); 454 } else 455 *mpp = mp; 456 457 return (error); 458 } 459 460 void 461 nfs_decode_args(nmp, argp) 462 struct nfsmount *nmp; 463 struct nfs_args *argp; 464 { 465 int s; 466 int adjsock; 467 int maxio; 468 469 s = splsoftnet(); 470 471 /* 472 * Silently clear NFSMNT_NOCONN if it's a TCP mount, it makes 473 * no sense in that context. 474 */ 475 if (argp->sotype == SOCK_STREAM) 476 argp->flags &= ~NFSMNT_NOCONN; 477 478 /* Re-bind if rsrvd port requested and wasn't on one */ 479 adjsock = !(nmp->nm_flag & NFSMNT_RESVPORT) 480 && (argp->flags & NFSMNT_RESVPORT); 481 /* Also re-bind if we're switching to/from a connected UDP socket */ 482 adjsock |= ((nmp->nm_flag & NFSMNT_NOCONN) != 483 (argp->flags & NFSMNT_NOCONN)); 484 485 /* Update flags atomically. Don't change the lock bits. */ 486 nmp->nm_flag = 487 (argp->flags & ~NFSMNT_INTERNAL) | (nmp->nm_flag & NFSMNT_INTERNAL); 488 splx(s); 489 490 if ((argp->flags & NFSMNT_TIMEO) && argp->timeo > 0) { 491 nmp->nm_timeo = (argp->timeo * NFS_HZ + 5) / 10; 492 if (nmp->nm_timeo < NFS_MINTIMEO) 493 nmp->nm_timeo = NFS_MINTIMEO; 494 else if (nmp->nm_timeo > NFS_MAXTIMEO) 495 nmp->nm_timeo = NFS_MAXTIMEO; 496 } 497 498 if ((argp->flags & NFSMNT_RETRANS) && argp->retrans > 1) { 499 nmp->nm_retry = argp->retrans; 500 if (nmp->nm_retry > NFS_MAXREXMIT) 501 nmp->nm_retry = NFS_MAXREXMIT; 502 } 503 504 if (argp->flags & NFSMNT_NFSV3) { 505 if (argp->sotype == SOCK_DGRAM) 506 maxio = NFS_MAXDGRAMDATA; 507 else 508 maxio = NFS_MAXDATA; 509 } else 510 maxio = NFS_V2MAXDATA; 511 512 if ((argp->flags & NFSMNT_WSIZE) && argp->wsize > 0) { 513 int osize = nmp->nm_wsize; 514 nmp->nm_wsize = argp->wsize; 515 /* Round down to multiple of blocksize */ 516 nmp->nm_wsize &= ~(NFS_FABLKSIZE - 1); 517 if (nmp->nm_wsize <= 0) 518 nmp->nm_wsize = NFS_FABLKSIZE; 519 adjsock |= (nmp->nm_wsize != osize); 520 } 521 if (nmp->nm_wsize > maxio) 522 nmp->nm_wsize = maxio; 523 if (nmp->nm_wsize > MAXBSIZE) 524 nmp->nm_wsize = MAXBSIZE; 525 526 if ((argp->flags & NFSMNT_RSIZE) && argp->rsize > 0) { 527 int osize = nmp->nm_rsize; 528 nmp->nm_rsize = argp->rsize; 529 /* Round down to multiple of blocksize */ 530 nmp->nm_rsize &= ~(NFS_FABLKSIZE - 1); 531 if (nmp->nm_rsize <= 0) 532 nmp->nm_rsize = NFS_FABLKSIZE; 533 adjsock |= (nmp->nm_rsize != osize); 534 } 535 if (nmp->nm_rsize > maxio) 536 nmp->nm_rsize = maxio; 537 if (nmp->nm_rsize > MAXBSIZE) 538 nmp->nm_rsize = MAXBSIZE; 539 540 if ((argp->flags & NFSMNT_READDIRSIZE) && argp->readdirsize > 0) { 541 nmp->nm_readdirsize = argp->readdirsize; 542 /* Round down to multiple of blocksize */ 543 nmp->nm_readdirsize &= ~(NFS_DIRBLKSIZ - 1); 544 if (nmp->nm_readdirsize < NFS_DIRBLKSIZ) 545 nmp->nm_readdirsize = NFS_DIRBLKSIZ; 546 } else if (argp->flags & NFSMNT_RSIZE) 547 nmp->nm_readdirsize = nmp->nm_rsize; 548 549 if (nmp->nm_readdirsize > maxio) 550 nmp->nm_readdirsize = maxio; 551 552 if ((argp->flags & NFSMNT_MAXGRPS) && argp->maxgrouplist >= 0 && 553 argp->maxgrouplist <= NFS_MAXGRPS) 554 nmp->nm_numgrps = argp->maxgrouplist; 555 if ((argp->flags & NFSMNT_READAHEAD) && argp->readahead >= 0 && 556 argp->readahead <= NFS_MAXRAHEAD) 557 nmp->nm_readahead = argp->readahead; 558 if ((argp->flags & NFSMNT_LEASETERM) && argp->leaseterm >= 2 && 559 argp->leaseterm <= NQ_MAXLEASE) 560 nmp->nm_leaseterm = argp->leaseterm; 561 if ((argp->flags & NFSMNT_DEADTHRESH) && argp->deadthresh >= 1 && 562 argp->deadthresh <= NQ_NEVERDEAD) 563 nmp->nm_deadthresh = argp->deadthresh; 564 565 adjsock |= ((nmp->nm_sotype != argp->sotype) || 566 (nmp->nm_soproto != argp->proto)); 567 nmp->nm_sotype = argp->sotype; 568 nmp->nm_soproto = argp->proto; 569 570 if (nmp->nm_so && adjsock) { 571 nfs_disconnect(nmp); 572 if (nmp->nm_sotype == SOCK_DGRAM) 573 while (nfs_connect(nmp, (struct nfsreq *)0)) { 574 printf("nfs_args: retrying connect\n"); 575 (void) tsleep((caddr_t)&lbolt, 576 PSOCK, "nfscon", 0); 577 } 578 } 579 } 580 581 /* 582 * VFS Operations. 583 * 584 * mount system call 585 * It seems a bit dumb to copyinstr() the host and path here and then 586 * bcopy() them in mountnfs(), but I wanted to detect errors before 587 * doing the sockargs() call because sockargs() allocates an mbuf and 588 * an error after that means that I have to release the mbuf. 589 */ 590 /* ARGSUSED */ 591 int 592 nfs_mount(mp, path, data, ndp, p) 593 struct mount *mp; 594 const char *path; 595 void *data; 596 struct nameidata *ndp; 597 struct proc *p; 598 { 599 int error; 600 struct nfs_args args; 601 struct mbuf *nam; 602 struct vnode *vp; 603 char pth[MNAMELEN], hst[MNAMELEN]; 604 size_t len; 605 u_char nfh[NFSX_V3FHMAX]; 606 607 error = copyin(data, (caddr_t)&args, sizeof (struct nfs_args)); 608 if (error) 609 return (error); 610 if (args.version != NFS_ARGSVERSION) 611 return (EPROGMISMATCH); 612 if (mp->mnt_flag & MNT_UPDATE) { 613 register struct nfsmount *nmp = VFSTONFS(mp); 614 615 if (nmp == NULL) 616 return (EIO); 617 /* 618 * When doing an update, we can't change from or to 619 * v3 and/or nqnfs. 620 */ 621 args.flags = (args.flags & ~(NFSMNT_NFSV3|NFSMNT_NQNFS)) | 622 (nmp->nm_flag & (NFSMNT_NFSV3|NFSMNT_NQNFS)); 623 nfs_decode_args(nmp, &args); 624 return (0); 625 } 626 error = copyin((caddr_t)args.fh, (caddr_t)nfh, args.fhsize); 627 if (error) 628 return (error); 629 error = copyinstr(path, pth, MNAMELEN-1, &len); 630 if (error) 631 return (error); 632 bzero(&pth[len], MNAMELEN - len); 633 error = copyinstr(args.hostname, hst, MNAMELEN-1, &len); 634 if (error) 635 return (error); 636 bzero(&hst[len], MNAMELEN - len); 637 /* sockargs() call must be after above copyin() calls */ 638 error = sockargs(&nam, (caddr_t)args.addr, args.addrlen, MT_SONAME); 639 if (error) 640 return (error); 641 args.fh = nfh; 642 error = mountnfs(&args, mp, nam, pth, hst, &vp); 643 return (error); 644 } 645 646 /* 647 * Common code for mount and mountroot 648 */ 649 int 650 mountnfs(argp, mp, nam, pth, hst, vpp) 651 register struct nfs_args *argp; 652 register struct mount *mp; 653 struct mbuf *nam; 654 const char *pth, *hst; 655 struct vnode **vpp; 656 { 657 register struct nfsmount *nmp; 658 struct nfsnode *np; 659 int error; 660 struct vattr attrs; 661 662 if (mp->mnt_flag & MNT_UPDATE) { 663 nmp = VFSTONFS(mp); 664 /* update paths, file handles, etc, here XXX */ 665 m_freem(nam); 666 return (0); 667 } else { 668 MALLOC(nmp, struct nfsmount *, sizeof (struct nfsmount), 669 M_NFSMNT, M_WAITOK); 670 bzero((caddr_t)nmp, sizeof (struct nfsmount)); 671 mp->mnt_data = (qaddr_t)nmp; 672 TAILQ_INIT(&nmp->nm_uidlruhead); 673 TAILQ_INIT(&nmp->nm_bufq); 674 } 675 #ifdef Lite2_integrated 676 vfs_getnewfsid(mp, makefstype(MOUNT_NFS)); 677 #else 678 getnewfsid(mp, makefstype(MOUNT_NFS)); 679 #endif 680 nmp->nm_mountp = mp; 681 682 if (argp->flags & NFSMNT_NQNFS) 683 /* 684 * We have to set mnt_maxsymlink to a non-zero value so 685 * that COMPAT_43 routines will know that we are setting 686 * the d_type field in directories (and can zero it for 687 * unsuspecting binaries). 688 */ 689 mp->mnt_maxsymlinklen = 1; 690 691 if (argp->flags & NFSMNT_NFSV3) 692 /* 693 * V2 can only handle 32 bit filesizes. For v3, nfs_fsinfo 694 * will fill this in. 695 */ 696 nmp->nm_maxfilesize = 0xffffffffLL; 697 698 nmp->nm_timeo = NFS_TIMEO; 699 nmp->nm_retry = NFS_RETRANS; 700 nmp->nm_wsize = NFS_WSIZE; 701 nmp->nm_rsize = NFS_RSIZE; 702 nmp->nm_readdirsize = NFS_READDIRSIZE; 703 nmp->nm_numgrps = NFS_MAXGRPS; 704 nmp->nm_readahead = NFS_DEFRAHEAD; 705 nmp->nm_leaseterm = NQ_DEFLEASE; 706 nmp->nm_deadthresh = NQ_DEADTHRESH; 707 CIRCLEQ_INIT(&nmp->nm_timerhead); 708 nmp->nm_inprog = NULLVP; 709 nmp->nm_fhsize = argp->fhsize; 710 bcopy((caddr_t)argp->fh, (caddr_t)nmp->nm_fh, argp->fhsize); 711 #ifdef COMPAT_09 712 mp->mnt_stat.f_type = 2; 713 #else 714 mp->mnt_stat.f_type = 0; 715 #endif 716 strncpy(&mp->mnt_stat.f_fstypename[0], mp->mnt_op->vfs_name, MFSNAMELEN); 717 bcopy(hst, mp->mnt_stat.f_mntfromname, MNAMELEN); 718 bcopy(pth, mp->mnt_stat.f_mntonname, MNAMELEN); 719 nmp->nm_nam = nam; 720 721 /* Set up the sockets and per-host congestion */ 722 nmp->nm_sotype = argp->sotype; 723 nmp->nm_soproto = argp->proto; 724 725 nfs_decode_args(nmp, argp); 726 727 /* 728 * For Connection based sockets (TCP,...) defer the connect until 729 * the first request, in case the server is not responding. 730 */ 731 if (nmp->nm_sotype == SOCK_DGRAM && 732 (error = nfs_connect(nmp, (struct nfsreq *)0))) 733 goto bad; 734 735 /* 736 * This is silly, but it has to be set so that vinifod() works. 737 * We do not want to do an nfs_statfs() here since we can get 738 * stuck on a dead server and we are holding a lock on the mount 739 * point. 740 */ 741 mp->mnt_stat.f_iosize = NFS_MAXDGRAMDATA; 742 /* 743 * A reference count is needed on the nfsnode representing the 744 * remote root. If this object is not persistent, then backward 745 * traversals of the mount point (i.e. "..") will not work if 746 * the nfsnode gets flushed out of the cache. Ufs does not have 747 * this problem, because one can identify root inodes by their 748 * number == ROOTINO (2). 749 */ 750 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np); 751 if (error) 752 goto bad; 753 *vpp = NFSTOV(np); 754 VOP_GETATTR(*vpp, &attrs, curproc->p_ucred, curproc); /* XXX */ 755 756 return (0); 757 bad: 758 nfs_disconnect(nmp); 759 free((caddr_t)nmp, M_NFSMNT); 760 m_freem(nam); 761 return (error); 762 } 763 764 /* 765 * unmount system call 766 */ 767 int 768 nfs_unmount(mp, mntflags, p) 769 struct mount *mp; 770 int mntflags; 771 struct proc *p; 772 { 773 register struct nfsmount *nmp; 774 struct nfsnode *np; 775 struct vnode *vp; 776 int error, flags = 0; 777 778 if (mntflags & MNT_FORCE) 779 flags |= FORCECLOSE; 780 nmp = VFSTONFS(mp); 781 /* 782 * Goes something like this.. 783 * - Check for activity on the root vnode (other than ourselves). 784 * - Call vflush() to clear out vnodes for this file system, 785 * except for the root vnode. 786 * - Decrement reference on the vnode representing remote root. 787 * - Close the socket 788 * - Free up the data structures 789 */ 790 /* 791 * We need to decrement the ref. count on the nfsnode representing 792 * the remote root. See comment in mountnfs(). The VFS unmount() 793 * has done vput on this vnode, otherwise we would get deadlock! 794 */ 795 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np); 796 if (error) 797 return(error); 798 vp = NFSTOV(np); 799 if ((mntflags & MNT_FORCE) == 0 && vp->v_usecount > 2) { 800 vput(vp); 801 return (EBUSY); 802 } 803 804 /* 805 * Must handshake with nqnfs_clientd() if it is active. 806 */ 807 nmp->nm_flag |= NFSMNT_DISMINPROG; 808 while (nmp->nm_inprog != NULLVP) 809 (void) tsleep((caddr_t)&lbolt, PSOCK, "nfsdism", 0); 810 error = vflush(mp, vp, flags); 811 if (error) { 812 vput(vp); 813 nmp->nm_flag &= ~NFSMNT_DISMINPROG; 814 return (error); 815 } 816 817 /* 818 * We are now committed to the unmount. 819 * For NQNFS, let the server daemon free the nfsmount structure. 820 */ 821 if (nmp->nm_flag & (NFSMNT_NQNFS | NFSMNT_KERB)) 822 nmp->nm_flag |= NFSMNT_DISMNT; 823 824 /* 825 * There are two reference counts to get rid of here. 826 */ 827 vrele(vp); 828 vrele(vp); 829 vgone(vp); 830 nfs_disconnect(nmp); 831 m_freem(nmp->nm_nam); 832 833 if ((nmp->nm_flag & (NFSMNT_NQNFS | NFSMNT_KERB)) == 0) 834 free((caddr_t)nmp, M_NFSMNT); 835 return (0); 836 } 837 838 /* 839 * Return root of a filesystem 840 */ 841 int 842 nfs_root(mp, vpp) 843 struct mount *mp; 844 struct vnode **vpp; 845 { 846 register struct vnode *vp; 847 struct nfsmount *nmp; 848 struct nfsnode *np; 849 int error; 850 851 nmp = VFSTONFS(mp); 852 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np); 853 if (error) 854 return (error); 855 vp = NFSTOV(np); 856 if (vp->v_type == VNON) 857 vp->v_type = VDIR; 858 vp->v_flag = VROOT; 859 *vpp = vp; 860 return (0); 861 } 862 863 extern int syncprt; 864 865 /* 866 * Flush out the buffer cache 867 */ 868 /* ARGSUSED */ 869 int 870 nfs_sync(mp, waitfor, cred, p) 871 struct mount *mp; 872 int waitfor; 873 struct ucred *cred; 874 struct proc *p; 875 { 876 register struct vnode *vp; 877 int error, allerror = 0; 878 879 /* 880 * Force stale buffer cache information to be flushed. 881 */ 882 loop: 883 for (vp = mp->mnt_vnodelist.lh_first; 884 vp != NULL; 885 vp = vp->v_mntvnodes.le_next) { 886 /* 887 * If the vnode that we are about to sync is no longer 888 * associated with this mount point, start over. 889 */ 890 if (vp->v_mount != mp) 891 goto loop; 892 if (VOP_ISLOCKED(vp) || vp->v_dirtyblkhd.lh_first == NULL) 893 continue; 894 #ifdef Lite2_integrated 895 if (vget(vp, LK_EXCLUSIVE, p)) 896 #else 897 if (vget(vp, 1)) 898 #endif 899 goto loop; 900 error = VOP_FSYNC(vp, cred, waitfor, p); 901 if (error) 902 allerror = error; 903 vput(vp); 904 } 905 return (allerror); 906 } 907 908 /* 909 * NFS flat namespace lookup. 910 * Currently unsupported. 911 */ 912 /* ARGSUSED */ 913 int 914 nfs_vget(mp, ino, vpp) 915 struct mount *mp; 916 ino_t ino; 917 struct vnode **vpp; 918 { 919 920 return (EOPNOTSUPP); 921 } 922 923 #ifdef notyet 924 /* 925 * Do that sysctl thang... 926 */ 927 static int 928 nfs_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, void *newp, 929 size_t newlen, struct proc *p) 930 { 931 int rv; 932 933 /* 934 * All names at this level are terminal. 935 */ 936 if(namelen > 1) 937 return ENOTDIR; /* overloaded */ 938 939 switch(name[0]) { 940 case NFS_NFSSTATS: 941 if(!oldp) { 942 *oldlenp = sizeof nfsstats; 943 return 0; 944 } 945 946 if(*oldlenp < sizeof nfsstats) { 947 *oldlenp = sizeof nfsstats; 948 return ENOMEM; 949 } 950 951 rv = copyout(&nfsstats, oldp, sizeof nfsstats); 952 if(rv) return rv; 953 954 if(newp && newlen != sizeof nfsstats) 955 return EINVAL; 956 957 if(newp) { 958 return copyin(newp, &nfsstats, sizeof nfsstats); 959 } 960 return 0; 961 962 default: 963 return EOPNOTSUPP; 964 } 965 } 966 #endif 967 968 969 /* 970 * At this point, this should never happen 971 */ 972 /* ARGSUSED */ 973 int 974 nfs_fhtovp(mp, fhp, nam, vpp, exflagsp, credanonp) 975 register struct mount *mp; 976 struct fid *fhp; 977 struct mbuf *nam; 978 struct vnode **vpp; 979 int *exflagsp; 980 struct ucred **credanonp; 981 { 982 983 return (EINVAL); 984 } 985 986 /* 987 * Vnode pointer to File handle, should never happen either 988 */ 989 /* ARGSUSED */ 990 int 991 nfs_vptofh(vp, fhp) 992 struct vnode *vp; 993 struct fid *fhp; 994 { 995 996 return (EINVAL); 997 } 998 999 /* 1000 * Vfs start routine, a no-op. 1001 */ 1002 /* ARGSUSED */ 1003 int 1004 nfs_start(mp, flags, p) 1005 struct mount *mp; 1006 int flags; 1007 struct proc *p; 1008 { 1009 1010 return (0); 1011 } 1012 1013 /* 1014 * Do operations associated with quotas, not supported 1015 */ 1016 /* ARGSUSED */ 1017 int 1018 nfs_quotactl(mp, cmd, uid, arg, p) 1019 struct mount *mp; 1020 int cmd; 1021 uid_t uid; 1022 caddr_t arg; 1023 struct proc *p; 1024 { 1025 1026 return (EOPNOTSUPP); 1027 } 1028
Indexes created Wed Sep 24 05:09:52 GMT 2025