nfs_vfsops.c revision 1.62.2.3
1 /* $NetBSD: nfs_vfsops.c,v 1.62.2.3 1997/10/14 15:58:45 thorpej 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 /* Re-bind if rsrvd port requested and wasn't on one */ 475 adjsock = !(nmp->nm_flag & NFSMNT_RESVPORT) 476 && (argp->flags & NFSMNT_RESVPORT); 477 /* Also re-bind if we're switching to/from a connected UDP socket */ 478 adjsock |= ((nmp->nm_flag & NFSMNT_NOCONN) != 479 (argp->flags & NFSMNT_NOCONN)); 480 481 /* Update flags atomically. Don't change the lock bits. */ 482 nmp->nm_flag = argp->flags | nmp->nm_flag; 483 splx(s); 484 485 if ((argp->flags & NFSMNT_TIMEO) && argp->timeo > 0) { 486 nmp->nm_timeo = (argp->timeo * NFS_HZ + 5) / 10; 487 if (nmp->nm_timeo < NFS_MINTIMEO) 488 nmp->nm_timeo = NFS_MINTIMEO; 489 else if (nmp->nm_timeo > NFS_MAXTIMEO) 490 nmp->nm_timeo = NFS_MAXTIMEO; 491 } 492 493 if ((argp->flags & NFSMNT_RETRANS) && argp->retrans > 1) { 494 nmp->nm_retry = argp->retrans; 495 if (nmp->nm_retry > NFS_MAXREXMIT) 496 nmp->nm_retry = NFS_MAXREXMIT; 497 } 498 499 if (argp->flags & NFSMNT_NFSV3) { 500 if (argp->sotype == SOCK_DGRAM) 501 maxio = NFS_MAXDGRAMDATA; 502 else 503 maxio = NFS_MAXDATA; 504 } else 505 maxio = NFS_V2MAXDATA; 506 507 if ((argp->flags & NFSMNT_WSIZE) && argp->wsize > 0) { 508 int osize = nmp->nm_wsize; 509 nmp->nm_wsize = argp->wsize; 510 /* Round down to multiple of blocksize */ 511 nmp->nm_wsize &= ~(NFS_FABLKSIZE - 1); 512 if (nmp->nm_wsize <= 0) 513 nmp->nm_wsize = NFS_FABLKSIZE; 514 adjsock |= (nmp->nm_wsize != osize); 515 } 516 if (nmp->nm_wsize > maxio) 517 nmp->nm_wsize = maxio; 518 if (nmp->nm_wsize > MAXBSIZE) 519 nmp->nm_wsize = MAXBSIZE; 520 521 if ((argp->flags & NFSMNT_RSIZE) && argp->rsize > 0) { 522 int osize = nmp->nm_rsize; 523 nmp->nm_rsize = argp->rsize; 524 /* Round down to multiple of blocksize */ 525 nmp->nm_rsize &= ~(NFS_FABLKSIZE - 1); 526 if (nmp->nm_rsize <= 0) 527 nmp->nm_rsize = NFS_FABLKSIZE; 528 adjsock |= (nmp->nm_rsize != osize); 529 } 530 if (nmp->nm_rsize > maxio) 531 nmp->nm_rsize = maxio; 532 if (nmp->nm_rsize > MAXBSIZE) 533 nmp->nm_rsize = MAXBSIZE; 534 535 if ((argp->flags & NFSMNT_READDIRSIZE) && argp->readdirsize > 0) { 536 nmp->nm_readdirsize = argp->readdirsize; 537 /* Round down to multiple of minimum blocksize */ 538 nmp->nm_readdirsize &= ~(NFS_DIRFRAGSIZ - 1); 539 if (nmp->nm_readdirsize < NFS_DIRFRAGSIZ) 540 nmp->nm_readdirsize = NFS_DIRFRAGSIZ; 541 /* Bigger than buffer size makes no sense */ 542 if (nmp->nm_readdirsize > NFS_DIRBLKSIZ) 543 nmp->nm_readdirsize = NFS_DIRBLKSIZ; 544 } else if (argp->flags & NFSMNT_RSIZE) 545 nmp->nm_readdirsize = nmp->nm_rsize; 546 547 if (nmp->nm_readdirsize > maxio) 548 nmp->nm_readdirsize = maxio; 549 550 if ((argp->flags & NFSMNT_MAXGRPS) && argp->maxgrouplist >= 0 && 551 argp->maxgrouplist <= NFS_MAXGRPS) 552 nmp->nm_numgrps = argp->maxgrouplist; 553 if ((argp->flags & NFSMNT_READAHEAD) && argp->readahead >= 0 && 554 argp->readahead <= NFS_MAXRAHEAD) 555 nmp->nm_readahead = argp->readahead; 556 if ((argp->flags & NFSMNT_LEASETERM) && argp->leaseterm >= 2 && 557 argp->leaseterm <= NQ_MAXLEASE) 558 nmp->nm_leaseterm = argp->leaseterm; 559 if ((argp->flags & NFSMNT_DEADTHRESH) && argp->deadthresh >= 1 && 560 argp->deadthresh <= NQ_NEVERDEAD) 561 nmp->nm_deadthresh = argp->deadthresh; 562 563 adjsock |= ((nmp->nm_sotype != argp->sotype) || 564 (nmp->nm_soproto != argp->proto)); 565 nmp->nm_sotype = argp->sotype; 566 nmp->nm_soproto = argp->proto; 567 568 if (nmp->nm_so && adjsock) { 569 nfs_disconnect(nmp); 570 if (nmp->nm_sotype == SOCK_DGRAM) 571 while (nfs_connect(nmp, (struct nfsreq *)0)) { 572 printf("nfs_args: retrying connect\n"); 573 (void) tsleep((caddr_t)&lbolt, 574 PSOCK, "nfscon", 0); 575 } 576 } 577 } 578 579 /* 580 * VFS Operations. 581 * 582 * mount system call 583 * It seems a bit dumb to copyinstr() the host and path here and then 584 * bcopy() them in mountnfs(), but I wanted to detect errors before 585 * doing the sockargs() call because sockargs() allocates an mbuf and 586 * an error after that means that I have to release the mbuf. 587 */ 588 /* ARGSUSED */ 589 int 590 nfs_mount(mp, path, data, ndp, p) 591 struct mount *mp; 592 const char *path; 593 void *data; 594 struct nameidata *ndp; 595 struct proc *p; 596 { 597 int error; 598 struct nfs_args args; 599 struct mbuf *nam; 600 struct vnode *vp; 601 char pth[MNAMELEN], hst[MNAMELEN]; 602 size_t len; 603 u_char nfh[NFSX_V3FHMAX]; 604 605 error = copyin(data, (caddr_t)&args, sizeof (struct nfs_args)); 606 if (error) 607 return (error); 608 if (args.version != NFS_ARGSVERSION) 609 return (EPROGMISMATCH); 610 if (mp->mnt_flag & MNT_UPDATE) { 611 register struct nfsmount *nmp = VFSTONFS(mp); 612 613 if (nmp == NULL) 614 return (EIO); 615 /* 616 * When doing an update, we can't change from or to 617 * v3 and/or nqnfs. 618 */ 619 args.flags = (args.flags & ~(NFSMNT_NFSV3|NFSMNT_NQNFS)) | 620 (nmp->nm_flag & (NFSMNT_NFSV3|NFSMNT_NQNFS)); 621 nfs_decode_args(nmp, &args); 622 return (0); 623 } 624 error = copyin((caddr_t)args.fh, (caddr_t)nfh, args.fhsize); 625 if (error) 626 return (error); 627 error = copyinstr(path, pth, MNAMELEN-1, &len); 628 if (error) 629 return (error); 630 bzero(&pth[len], MNAMELEN - len); 631 error = copyinstr(args.hostname, hst, MNAMELEN-1, &len); 632 if (error) 633 return (error); 634 bzero(&hst[len], MNAMELEN - len); 635 /* sockargs() call must be after above copyin() calls */ 636 error = sockargs(&nam, (caddr_t)args.addr, args.addrlen, MT_SONAME); 637 if (error) 638 return (error); 639 args.fh = nfh; 640 error = mountnfs(&args, mp, nam, pth, hst, &vp, p); 641 return (error); 642 } 643 644 /* 645 * Common code for mount and mountroot 646 */ 647 int 648 mountnfs(argp, mp, nam, pth, hst, vpp, p) 649 register struct nfs_args *argp; 650 register struct mount *mp; 651 struct mbuf *nam; 652 const char *pth, *hst; 653 struct vnode **vpp; 654 struct proc *p; 655 { 656 register struct nfsmount *nmp; 657 struct nfsnode *np; 658 int error; 659 struct vattr attrs; 660 struct ucred *cr; 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) == 0) 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, p->p_ucred, p); 755 if (nmp->nm_flag & NFSMNT_NFSV3) { 756 cr = crget(); 757 cr->cr_uid = attrs.va_uid; 758 cr->cr_gid = attrs.va_gid; 759 cr->cr_ngroups = 0; 760 nfs_cookieheuristic(*vpp, &nmp->nm_iflag, p, cr); 761 crfree(cr); 762 } 763 764 return (0); 765 bad: 766 nfs_disconnect(nmp); 767 free((caddr_t)nmp, M_NFSMNT); 768 m_freem(nam); 769 return (error); 770 } 771 772 /* 773 * unmount system call 774 */ 775 int 776 nfs_unmount(mp, mntflags, p) 777 struct mount *mp; 778 int mntflags; 779 struct proc *p; 780 { 781 register struct nfsmount *nmp; 782 struct nfsnode *np; 783 struct vnode *vp; 784 int error, flags = 0; 785 786 if (mntflags & MNT_FORCE) 787 flags |= FORCECLOSE; 788 nmp = VFSTONFS(mp); 789 /* 790 * Goes something like this.. 791 * - Check for activity on the root vnode (other than ourselves). 792 * - Call vflush() to clear out vnodes for this file system, 793 * except for the root vnode. 794 * - Decrement reference on the vnode representing remote root. 795 * - Close the socket 796 * - Free up the data structures 797 */ 798 /* 799 * We need to decrement the ref. count on the nfsnode representing 800 * the remote root. See comment in mountnfs(). The VFS unmount() 801 * has done vput on this vnode, otherwise we would get deadlock! 802 */ 803 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np); 804 if (error) 805 return(error); 806 vp = NFSTOV(np); 807 if ((mntflags & MNT_FORCE) == 0 && vp->v_usecount > 2) { 808 vput(vp); 809 return (EBUSY); 810 } 811 812 /* 813 * Must handshake with nqnfs_clientd() if it is active. 814 */ 815 nmp->nm_iflag |= NFSMNT_DISMINPROG; 816 while (nmp->nm_inprog != NULLVP) 817 (void) tsleep((caddr_t)&lbolt, PSOCK, "nfsdism", 0); 818 error = vflush(mp, vp, flags); 819 if (error) { 820 vput(vp); 821 nmp->nm_iflag &= ~NFSMNT_DISMINPROG; 822 return (error); 823 } 824 825 /* 826 * We are now committed to the unmount. 827 * For NQNFS, let the server daemon free the nfsmount structure. 828 */ 829 if (nmp->nm_flag & (NFSMNT_NQNFS | NFSMNT_KERB)) 830 nmp->nm_iflag |= NFSMNT_DISMNT; 831 832 /* 833 * There are two reference counts to get rid of here. 834 */ 835 vrele(vp); 836 vrele(vp); 837 vgone(vp); 838 nfs_disconnect(nmp); 839 m_freem(nmp->nm_nam); 840 841 if ((nmp->nm_flag & (NFSMNT_NQNFS | NFSMNT_KERB)) == 0) 842 free((caddr_t)nmp, M_NFSMNT); 843 return (0); 844 } 845 846 /* 847 * Return root of a filesystem 848 */ 849 int 850 nfs_root(mp, vpp) 851 struct mount *mp; 852 struct vnode **vpp; 853 { 854 register struct vnode *vp; 855 struct nfsmount *nmp; 856 struct nfsnode *np; 857 int error; 858 859 nmp = VFSTONFS(mp); 860 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np); 861 if (error) 862 return (error); 863 vp = NFSTOV(np); 864 if (vp->v_type == VNON) 865 vp->v_type = VDIR; 866 vp->v_flag = VROOT; 867 *vpp = vp; 868 return (0); 869 } 870 871 extern int syncprt; 872 873 /* 874 * Flush out the buffer cache 875 */ 876 /* ARGSUSED */ 877 int 878 nfs_sync(mp, waitfor, cred, p) 879 struct mount *mp; 880 int waitfor; 881 struct ucred *cred; 882 struct proc *p; 883 { 884 register struct vnode *vp; 885 int error, allerror = 0; 886 887 /* 888 * Force stale buffer cache information to be flushed. 889 */ 890 loop: 891 for (vp = mp->mnt_vnodelist.lh_first; 892 vp != NULL; 893 vp = vp->v_mntvnodes.le_next) { 894 /* 895 * If the vnode that we are about to sync is no longer 896 * associated with this mount point, start over. 897 */ 898 if (vp->v_mount != mp) 899 goto loop; 900 if (VOP_ISLOCKED(vp) || vp->v_dirtyblkhd.lh_first == NULL) 901 continue; 902 #ifdef Lite2_integrated 903 if (vget(vp, LK_EXCLUSIVE, p)) 904 #else 905 if (vget(vp, 1)) 906 #endif 907 goto loop; 908 error = VOP_FSYNC(vp, cred, waitfor, p); 909 if (error) 910 allerror = error; 911 vput(vp); 912 } 913 return (allerror); 914 } 915 916 /* 917 * NFS flat namespace lookup. 918 * Currently unsupported. 919 */ 920 /* ARGSUSED */ 921 int 922 nfs_vget(mp, ino, vpp) 923 struct mount *mp; 924 ino_t ino; 925 struct vnode **vpp; 926 { 927 928 return (EOPNOTSUPP); 929 } 930 931 #ifdef notyet 932 /* 933 * Do that sysctl thang... 934 */ 935 static int 936 nfs_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, void *newp, 937 size_t newlen, struct proc *p) 938 { 939 int rv; 940 941 /* 942 * All names at this level are terminal. 943 */ 944 if(namelen > 1) 945 return ENOTDIR; /* overloaded */ 946 947 switch(name[0]) { 948 case NFS_NFSSTATS: 949 if(!oldp) { 950 *oldlenp = sizeof nfsstats; 951 return 0; 952 } 953 954 if(*oldlenp < sizeof nfsstats) { 955 *oldlenp = sizeof nfsstats; 956 return ENOMEM; 957 } 958 959 rv = copyout(&nfsstats, oldp, sizeof nfsstats); 960 if(rv) return rv; 961 962 if(newp && newlen != sizeof nfsstats) 963 return EINVAL; 964 965 if(newp) { 966 return copyin(newp, &nfsstats, sizeof nfsstats); 967 } 968 return 0; 969 970 default: 971 return EOPNOTSUPP; 972 } 973 } 974 #endif 975 976 977 /* 978 * At this point, this should never happen 979 */ 980 /* ARGSUSED */ 981 int 982 nfs_fhtovp(mp, fhp, nam, vpp, exflagsp, credanonp) 983 register struct mount *mp; 984 struct fid *fhp; 985 struct mbuf *nam; 986 struct vnode **vpp; 987 int *exflagsp; 988 struct ucred **credanonp; 989 { 990 991 return (EINVAL); 992 } 993 994 /* 995 * Vnode pointer to File handle, should never happen either 996 */ 997 /* ARGSUSED */ 998 int 999 nfs_vptofh(vp, fhp) 1000 struct vnode *vp; 1001 struct fid *fhp; 1002 { 1003 1004 return (EINVAL); 1005 } 1006 1007 /* 1008 * Vfs start routine, a no-op. 1009 */ 1010 /* ARGSUSED */ 1011 int 1012 nfs_start(mp, flags, p) 1013 struct mount *mp; 1014 int flags; 1015 struct proc *p; 1016 { 1017 1018 return (0); 1019 } 1020 1021 /* 1022 * Do operations associated with quotas, not supported 1023 */ 1024 /* ARGSUSED */ 1025 int 1026 nfs_quotactl(mp, cmd, uid, arg, p) 1027 struct mount *mp; 1028 int cmd; 1029 uid_t uid; 1030 caddr_t arg; 1031 struct proc *p; 1032 { 1033 1034 return (EOPNOTSUPP); 1035 } 1036
Indexes created Wed Oct 01 07:09:59 GMT 2025