nfs_vfsops.c revision 1.68
1 /* $NetBSD: nfs_vfsops.c,v 1.68 1998/02/18 07:05:49 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 84 extern struct vnodeopv_desc nfsv2_vnodeop_opv_desc; 85 extern struct vnodeopv_desc spec_nfsv2nodeop_opv_desc; 86 #ifdef FIFO 87 extern struct vnodeopv_desc fifo_nfsv2nodeop_opv_desc; 88 #endif 89 90 struct vnodeopv_desc *nfs_vnodeopv_descs[] = { 91 &nfsv2_vnodeop_opv_desc, 92 &spec_nfsv2nodeop_opv_desc, 93 #ifdef FIFO 94 &fifo_nfsv2nodeop_opv_desc, 95 #endif 96 NULL, 97 }; 98 99 struct vfsops nfs_vfsops = { 100 MOUNT_NFS, 101 nfs_mount, 102 nfs_start, 103 nfs_unmount, 104 nfs_root, 105 nfs_quotactl, 106 nfs_statfs, 107 nfs_sync, 108 nfs_vget, 109 nfs_fhtovp, 110 nfs_vptofh, 111 nfs_vfs_init, 112 nfs_mountroot, 113 nfs_vnodeopv_descs, 114 #ifdef notyet 115 nfs_sysctl 116 #endif 117 }; 118 119 extern u_int32_t nfs_procids[NFS_NPROCS]; 120 extern u_int32_t nfs_prog, nfs_vers; 121 122 static int nfs_mount_diskless __P((struct nfs_dlmount *, const char *, 123 struct mount **, struct vnode **, struct proc *)); 124 125 #define TRUE 1 126 #define FALSE 0 127 128 /* 129 * nfs statfs call 130 */ 131 int 132 nfs_statfs(mp, sbp, p) 133 struct mount *mp; 134 register struct statfs *sbp; 135 struct proc *p; 136 { 137 register struct vnode *vp; 138 register struct nfs_statfs *sfp; 139 register caddr_t cp; 140 register u_int32_t *tl; 141 register int32_t t1, t2; 142 caddr_t bpos, dpos, cp2; 143 struct nfsmount *nmp = VFSTONFS(mp); 144 int error = 0, v3 = (nmp->nm_flag & NFSMNT_NFSV3), retattr; 145 struct mbuf *mreq, *mrep = NULL, *md, *mb, *mb2; 146 struct ucred *cred; 147 struct nfsnode *np; 148 u_quad_t tquad; 149 150 #ifndef nolint 151 sfp = (struct nfs_statfs *)0; 152 #endif 153 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np); 154 if (error) 155 return (error); 156 vp = NFSTOV(np); 157 cred = crget(); 158 cred->cr_ngroups = 0; 159 if (v3 && (nmp->nm_iflag & NFSMNT_GOTFSINFO) == 0) 160 (void)nfs_fsinfo(nmp, vp, cred, p); 161 nfsstats.rpccnt[NFSPROC_FSSTAT]++; 162 nfsm_reqhead(vp, NFSPROC_FSSTAT, NFSX_FH(v3)); 163 nfsm_fhtom(vp, v3); 164 nfsm_request(vp, NFSPROC_FSSTAT, p, cred); 165 if (v3) 166 nfsm_postop_attr(vp, retattr); 167 if (error) { 168 if (mrep != NULL) 169 m_free(mrep); 170 goto nfsmout; 171 } 172 nfsm_dissect(sfp, struct nfs_statfs *, NFSX_STATFS(v3)); 173 #ifdef COMPAT_09 174 sbp->f_type = 2; 175 #else 176 sbp->f_type = 0; 177 #endif 178 sbp->f_flags = nmp->nm_flag; 179 sbp->f_iosize = min(nmp->nm_rsize, nmp->nm_wsize); 180 if (v3) { 181 sbp->f_bsize = NFS_FABLKSIZE; 182 fxdr_hyper(&sfp->sf_tbytes, &tquad); 183 sbp->f_blocks = (long)(tquad / ((u_quad_t)NFS_FABLKSIZE)); 184 fxdr_hyper(&sfp->sf_fbytes, &tquad); 185 sbp->f_bfree = (long)(tquad / ((u_quad_t)NFS_FABLKSIZE)); 186 fxdr_hyper(&sfp->sf_abytes, &tquad); 187 sbp->f_bavail = (long)(tquad / ((u_quad_t)NFS_FABLKSIZE)); 188 sbp->f_files = (fxdr_unsigned(int32_t, 189 sfp->sf_tfiles.nfsuquad[1]) & 0x7fffffff); 190 sbp->f_ffree = (fxdr_unsigned(int32_t, 191 sfp->sf_ffiles.nfsuquad[1]) & 0x7fffffff); 192 } else { 193 sbp->f_bsize = fxdr_unsigned(int32_t, sfp->sf_bsize); 194 sbp->f_blocks = fxdr_unsigned(int32_t, sfp->sf_blocks); 195 sbp->f_bfree = fxdr_unsigned(int32_t, sfp->sf_bfree); 196 sbp->f_bavail = fxdr_unsigned(int32_t, sfp->sf_bavail); 197 sbp->f_files = 0; 198 sbp->f_ffree = 0; 199 } 200 if (sbp != &mp->mnt_stat) { 201 bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN); 202 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); 203 } 204 strncpy(&sbp->f_fstypename[0], mp->mnt_op->vfs_name, MFSNAMELEN); 205 nfsm_reqdone; 206 vrele(vp); 207 crfree(cred); 208 return (error); 209 } 210 211 /* 212 * nfs version 3 fsinfo rpc call 213 */ 214 int 215 nfs_fsinfo(nmp, vp, cred, p) 216 register struct nfsmount *nmp; 217 register struct vnode *vp; 218 struct ucred *cred; 219 struct proc *p; 220 { 221 register struct nfsv3_fsinfo *fsp; 222 register caddr_t cp; 223 register int32_t t1, t2; 224 register u_int32_t *tl, pref, max; 225 caddr_t bpos, dpos, cp2; 226 int error = 0, retattr; 227 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 228 u_int64_t maxfsize; 229 230 nfsstats.rpccnt[NFSPROC_FSINFO]++; 231 nfsm_reqhead(vp, NFSPROC_FSINFO, NFSX_FH(1)); 232 nfsm_fhtom(vp, 1); 233 nfsm_request(vp, NFSPROC_FSINFO, p, cred); 234 nfsm_postop_attr(vp, retattr); 235 if (!error) { 236 nfsm_dissect(fsp, struct nfsv3_fsinfo *, NFSX_V3FSINFO); 237 pref = fxdr_unsigned(u_int32_t, fsp->fs_wtpref); 238 if (pref < nmp->nm_wsize && pref >= NFS_FABLKSIZE) 239 nmp->nm_wsize = (pref + NFS_FABLKSIZE - 1) & 240 ~(NFS_FABLKSIZE - 1); 241 max = fxdr_unsigned(u_int32_t, fsp->fs_wtmax); 242 if (max < nmp->nm_wsize && max > 0) { 243 nmp->nm_wsize = max & ~(NFS_FABLKSIZE - 1); 244 if (nmp->nm_wsize == 0) 245 nmp->nm_wsize = max; 246 } 247 pref = fxdr_unsigned(u_int32_t, fsp->fs_rtpref); 248 if (pref < nmp->nm_rsize && pref >= NFS_FABLKSIZE) 249 nmp->nm_rsize = (pref + NFS_FABLKSIZE - 1) & 250 ~(NFS_FABLKSIZE - 1); 251 max = fxdr_unsigned(u_int32_t, fsp->fs_rtmax); 252 if (max < nmp->nm_rsize && max > 0) { 253 nmp->nm_rsize = max & ~(NFS_FABLKSIZE - 1); 254 if (nmp->nm_rsize == 0) 255 nmp->nm_rsize = max; 256 } 257 pref = fxdr_unsigned(u_int32_t, fsp->fs_dtpref); 258 if (pref < nmp->nm_readdirsize && pref >= NFS_DIRFRAGSIZ) 259 nmp->nm_readdirsize = (pref + NFS_DIRFRAGSIZ - 1) & 260 ~(NFS_DIRFRAGSIZ - 1); 261 if (max < nmp->nm_readdirsize && max > 0) { 262 nmp->nm_readdirsize = max & ~(NFS_DIRFRAGSIZ - 1); 263 if (nmp->nm_readdirsize == 0) 264 nmp->nm_readdirsize = max; 265 } 266 /* XXX */ 267 nmp->nm_maxfilesize = (u_int64_t)0x80000000 * DEV_BSIZE - 1; 268 fxdr_hyper(&fsp->fs_maxfilesize, &maxfsize); 269 if (maxfsize > 0 && maxfsize < nmp->nm_maxfilesize) 270 nmp->nm_maxfilesize = maxfsize; 271 nmp->nm_iflag |= NFSMNT_GOTFSINFO; 272 } 273 nfsm_reqdone; 274 return (error); 275 } 276 277 /* 278 * Mount a remote root fs via. NFS. It goes like this: 279 * - Call nfs_boot_init() to fill in the nfs_diskless struct 280 * - build the rootfs mount point and call mountnfs() to do the rest. 281 */ 282 int 283 nfs_mountroot() 284 { 285 struct nfs_diskless *nd; 286 struct vattr attr; 287 struct mount *mp; 288 struct vnode *vp; 289 struct proc *procp; 290 long n; 291 int error; 292 293 procp = curproc; /* XXX */ 294 295 if (root_device->dv_class != DV_IFNET) 296 return (ENODEV); 297 298 /* 299 * XXX time must be non-zero when we init the interface or else 300 * the arp code will wedge. [Fixed now in if_ether.c] 301 * However, the NFS attribute cache gives false "hits" when 302 * time.tv_sec < NFS_ATTRTIMEO(np) so keep this in for now. 303 */ 304 if (time.tv_sec < NFS_MAXATTRTIMO) 305 time.tv_sec = NFS_MAXATTRTIMO; 306 307 /* 308 * Call nfs_boot_init() to fill in the nfs_diskless struct. 309 * Side effect: Finds and configures a network interface. 310 */ 311 nd = malloc(sizeof(*nd), M_NFSMNT, M_WAITOK); 312 bzero((caddr_t)nd, sizeof(*nd)); 313 error = nfs_boot_init(nd, procp); 314 if (error) 315 goto out; 316 317 /* 318 * Create the root mount point. 319 */ 320 error = nfs_mount_diskless(&nd->nd_root, "/", &mp, &vp, procp); 321 if (error) 322 goto out; 323 printf("root on %s\n", nd->nd_root.ndm_host); 324 325 /* 326 * Link it into the mount list. 327 */ 328 #ifdef Lite2_integrated 329 simple_lock(&mountlist_slock); 330 CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list); 331 simple_unlock(&mountlist_slock); 332 rootvp = vp; 333 vfs_unbusy(mp, procp); 334 #else 335 if (vfs_lock(mp)) 336 panic("nfs_mountroot: vfs_lock"); 337 CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list); 338 mp->mnt_vnodecovered = NULLVP; 339 vfs_unlock(mp); 340 rootvp = vp; 341 #endif 342 343 /* Get root attributes (for the time). */ 344 error = VOP_GETATTR(vp, &attr, procp->p_ucred, procp); 345 if (error) 346 panic("nfs_mountroot: getattr for root"); 347 n = attr.va_mtime.tv_sec; 348 #ifdef DEBUG 349 printf("root time: 0x%lx\n", n); 350 #endif 351 inittodr(n); 352 353 #if 0 354 /* 355 * XXX splnet, so networks will receive... 356 * XXX Which port needed this hack? 357 * XXX Should already be at spl0. 358 */ 359 splnet(); 360 #endif 361 362 #if 0 /* swap now comes in from swapctl(2) */ 363 #ifdef notyet 364 /* Set up swap credentials. */ 365 proc0.p_ucred->cr_uid = 0; 366 proc0.p_ucred->cr_gid = 0; 367 proc0.p_ucred->cr_ngroups = 0; 368 #endif 369 370 /* 371 * "Mount" the swap device. 372 * 373 * On a "dataless" configuration (swap on disk) we will have: 374 * (swdevt[0].sw_dev != NODEV) identifying the swap device. 375 */ 376 if (bdevvp(swapdev, &swapdev_vp)) 377 panic("nfs_mountroot: can't setup swap vp"); 378 if (swdevt[0].sw_dev != NODEV) { 379 printf("swap on device 0x%x\n", swdevt[0].sw_dev); 380 error = 0; 381 goto out; 382 } 383 384 /* 385 * If swapping to an nfs node: (swdevt[0].sw_dev == NODEV) 386 * Create a fake mount point just for the swap vnode so that the 387 * swap file can be on a different server from the rootfs. 388 */ 389 error = nfs_mount_diskless(&nd->nd_swap, "/swap", &mp, &vp, procp); 390 if (error) { 391 printf("nfs_boot: warning: mount(swap), error=%d\n", error); 392 error = 0; 393 goto out; 394 } 395 #ifdef Lite2_integrated 396 vfs_unbusy(mp, procp); 397 #endif 398 printf("swap on %s\n", nd->nd_swap.ndm_host); 399 400 /* 401 * Since the swap file is not the root dir of a file system, 402 * hack it to a regular file. 403 */ 404 vp->v_type = VREG; 405 vp->v_flag = 0; 406 swdevt[0].sw_vp = vp; 407 408 /* 409 * Find out how large the swap file is. 410 */ 411 error = VOP_GETATTR(vp, &attr, procp->p_ucred, procp); 412 if (error) 413 panic("nfs_mountroot: getattr for swap"); 414 n = (long) (attr.va_size >> DEV_BSHIFT); 415 #ifdef DEBUG 416 printf("swap size: 0x%lx (blocks)\n", n); 417 #endif 418 swdevt[0].sw_nblks = n; 419 #endif 420 421 out: 422 free(nd, M_NFSMNT); 423 return (error); 424 } 425 426 /* 427 * Internal version of mount system call for diskless setup. 428 * Separate function because we used to call it twice. 429 * (once for root and once for swap) 430 */ 431 static int 432 nfs_mount_diskless(ndmntp, mntname, mpp, vpp, p) 433 struct nfs_dlmount *ndmntp; 434 const char *mntname; /* mount point name */ 435 struct mount **mpp; 436 struct vnode **vpp; 437 struct proc *p; 438 { 439 struct mount *mp; 440 struct mbuf *m; 441 int error; 442 443 #ifdef Lite2_integrated 444 vfs_rootmountalloc("nfs", mntname, &mp); 445 #else 446 /* Create the mount point. */ 447 mp = (struct mount *)malloc((u_long)sizeof(struct mount), 448 M_MOUNT, M_WAITOK); 449 bzero((char *)mp, (u_long)sizeof(struct mount)); 450 #endif 451 mp->mnt_op = &nfs_vfsops; 452 /* mp->mnt_flag = 0 */ 453 454 /* Get mbuf for server sockaddr. */ 455 m = m_get(M_WAIT, MT_SONAME); 456 if (m == NULL) 457 panic("nfs_mountroot: mget soname for %s", mntname); 458 bcopy((caddr_t)ndmntp->ndm_args.addr, mtod(m, caddr_t), 459 (m->m_len = ndmntp->ndm_args.addr->sa_len)); 460 461 error = mountnfs(&ndmntp->ndm_args, mp, m, mntname, 462 ndmntp->ndm_args.hostname, vpp, p); 463 if (error) { 464 printf("nfs_mountroot: mount %s failed: %d\n", 465 mntname, error); 466 free(mp, M_MOUNT); 467 } else 468 *mpp = mp; 469 470 return (error); 471 } 472 473 void 474 nfs_decode_args(nmp, argp) 475 struct nfsmount *nmp; 476 struct nfs_args *argp; 477 { 478 int s; 479 int adjsock; 480 int maxio; 481 482 s = splsoftnet(); 483 484 /* 485 * Silently clear NFSMNT_NOCONN if it's a TCP mount, it makes 486 * no sense in that context. 487 */ 488 if (argp->sotype == SOCK_STREAM) 489 argp->flags &= ~NFSMNT_NOCONN; 490 491 /* 492 * Cookie translation is not needed for v2, silently ignore it. 493 */ 494 if ((argp->flags & (NFSMNT_XLATECOOKIE|NFSMNT_NFSV3)) == 495 NFSMNT_XLATECOOKIE) 496 argp->flags &= ~NFSMNT_XLATECOOKIE; 497 498 /* Re-bind if rsrvd port requested and wasn't on one */ 499 adjsock = !(nmp->nm_flag & NFSMNT_RESVPORT) 500 && (argp->flags & NFSMNT_RESVPORT); 501 /* Also re-bind if we're switching to/from a connected UDP socket */ 502 adjsock |= ((nmp->nm_flag & NFSMNT_NOCONN) != 503 (argp->flags & NFSMNT_NOCONN)); 504 505 /* Update flags atomically. Don't change the lock bits. */ 506 nmp->nm_flag = argp->flags | nmp->nm_flag; 507 splx(s); 508 509 if ((argp->flags & NFSMNT_TIMEO) && argp->timeo > 0) { 510 nmp->nm_timeo = (argp->timeo * NFS_HZ + 5) / 10; 511 if (nmp->nm_timeo < NFS_MINTIMEO) 512 nmp->nm_timeo = NFS_MINTIMEO; 513 else if (nmp->nm_timeo > NFS_MAXTIMEO) 514 nmp->nm_timeo = NFS_MAXTIMEO; 515 } 516 517 if ((argp->flags & NFSMNT_RETRANS) && argp->retrans > 1) { 518 nmp->nm_retry = argp->retrans; 519 if (nmp->nm_retry > NFS_MAXREXMIT) 520 nmp->nm_retry = NFS_MAXREXMIT; 521 } 522 523 if (argp->flags & NFSMNT_NFSV3) { 524 if (argp->sotype == SOCK_DGRAM) 525 maxio = NFS_MAXDGRAMDATA; 526 else 527 maxio = NFS_MAXDATA; 528 } else 529 maxio = NFS_V2MAXDATA; 530 531 if ((argp->flags & NFSMNT_WSIZE) && argp->wsize > 0) { 532 int osize = nmp->nm_wsize; 533 nmp->nm_wsize = argp->wsize; 534 /* Round down to multiple of blocksize */ 535 nmp->nm_wsize &= ~(NFS_FABLKSIZE - 1); 536 if (nmp->nm_wsize <= 0) 537 nmp->nm_wsize = NFS_FABLKSIZE; 538 adjsock |= (nmp->nm_wsize != osize); 539 } 540 if (nmp->nm_wsize > maxio) 541 nmp->nm_wsize = maxio; 542 if (nmp->nm_wsize > MAXBSIZE) 543 nmp->nm_wsize = MAXBSIZE; 544 545 if ((argp->flags & NFSMNT_RSIZE) && argp->rsize > 0) { 546 int osize = nmp->nm_rsize; 547 nmp->nm_rsize = argp->rsize; 548 /* Round down to multiple of blocksize */ 549 nmp->nm_rsize &= ~(NFS_FABLKSIZE - 1); 550 if (nmp->nm_rsize <= 0) 551 nmp->nm_rsize = NFS_FABLKSIZE; 552 adjsock |= (nmp->nm_rsize != osize); 553 } 554 if (nmp->nm_rsize > maxio) 555 nmp->nm_rsize = maxio; 556 if (nmp->nm_rsize > MAXBSIZE) 557 nmp->nm_rsize = MAXBSIZE; 558 559 if ((argp->flags & NFSMNT_READDIRSIZE) && argp->readdirsize > 0) { 560 nmp->nm_readdirsize = argp->readdirsize; 561 /* Round down to multiple of minimum blocksize */ 562 nmp->nm_readdirsize &= ~(NFS_DIRFRAGSIZ - 1); 563 if (nmp->nm_readdirsize < NFS_DIRFRAGSIZ) 564 nmp->nm_readdirsize = NFS_DIRFRAGSIZ; 565 /* Bigger than buffer size makes no sense */ 566 if (nmp->nm_readdirsize > NFS_DIRBLKSIZ) 567 nmp->nm_readdirsize = NFS_DIRBLKSIZ; 568 } else if (argp->flags & NFSMNT_RSIZE) 569 nmp->nm_readdirsize = nmp->nm_rsize; 570 571 if (nmp->nm_readdirsize > maxio) 572 nmp->nm_readdirsize = maxio; 573 574 if ((argp->flags & NFSMNT_MAXGRPS) && argp->maxgrouplist >= 0 && 575 argp->maxgrouplist <= NFS_MAXGRPS) 576 nmp->nm_numgrps = argp->maxgrouplist; 577 if ((argp->flags & NFSMNT_READAHEAD) && argp->readahead >= 0 && 578 argp->readahead <= NFS_MAXRAHEAD) 579 nmp->nm_readahead = argp->readahead; 580 if ((argp->flags & NFSMNT_LEASETERM) && argp->leaseterm >= 2 && 581 argp->leaseterm <= NQ_MAXLEASE) 582 nmp->nm_leaseterm = argp->leaseterm; 583 if ((argp->flags & NFSMNT_DEADTHRESH) && argp->deadthresh >= 1 && 584 argp->deadthresh <= NQ_NEVERDEAD) 585 nmp->nm_deadthresh = argp->deadthresh; 586 587 adjsock |= ((nmp->nm_sotype != argp->sotype) || 588 (nmp->nm_soproto != argp->proto)); 589 nmp->nm_sotype = argp->sotype; 590 nmp->nm_soproto = argp->proto; 591 592 if (nmp->nm_so && adjsock) { 593 nfs_safedisconnect(nmp); 594 if (nmp->nm_sotype == SOCK_DGRAM) 595 while (nfs_connect(nmp, (struct nfsreq *)0)) { 596 printf("nfs_args: retrying connect\n"); 597 (void) tsleep((caddr_t)&lbolt, 598 PSOCK, "nfscon", 0); 599 } 600 } 601 } 602 603 /* 604 * VFS Operations. 605 * 606 * mount system call 607 * It seems a bit dumb to copyinstr() the host and path here and then 608 * bcopy() them in mountnfs(), but I wanted to detect errors before 609 * doing the sockargs() call because sockargs() allocates an mbuf and 610 * an error after that means that I have to release the mbuf. 611 */ 612 /* ARGSUSED */ 613 int 614 nfs_mount(mp, path, data, ndp, p) 615 struct mount *mp; 616 const char *path; 617 void *data; 618 struct nameidata *ndp; 619 struct proc *p; 620 { 621 int error; 622 struct nfs_args args; 623 struct mbuf *nam; 624 struct vnode *vp; 625 char pth[MNAMELEN], hst[MNAMELEN]; 626 size_t len; 627 u_char nfh[NFSX_V3FHMAX]; 628 629 error = copyin(data, (caddr_t)&args, sizeof (struct nfs_args)); 630 if (error) 631 return (error); 632 if (args.version != NFS_ARGSVERSION) 633 return (EPROGMISMATCH); 634 if (mp->mnt_flag & MNT_UPDATE) { 635 register struct nfsmount *nmp = VFSTONFS(mp); 636 637 if (nmp == NULL) 638 return (EIO); 639 /* 640 * When doing an update, we can't change from or to 641 * v3 and/or nqnfs, or change cookie translation 642 */ 643 args.flags = (args.flags & 644 ~(NFSMNT_NFSV3|NFSMNT_NQNFS|NFSMNT_XLATECOOKIE)) | 645 (nmp->nm_flag & 646 (NFSMNT_NFSV3|NFSMNT_NQNFS|NFSMNT_XLATECOOKIE)); 647 nfs_decode_args(nmp, &args); 648 return (0); 649 } 650 error = copyin((caddr_t)args.fh, (caddr_t)nfh, args.fhsize); 651 if (error) 652 return (error); 653 error = copyinstr(path, pth, MNAMELEN-1, &len); 654 if (error) 655 return (error); 656 bzero(&pth[len], MNAMELEN - len); 657 error = copyinstr(args.hostname, hst, MNAMELEN-1, &len); 658 if (error) 659 return (error); 660 bzero(&hst[len], MNAMELEN - len); 661 /* sockargs() call must be after above copyin() calls */ 662 error = sockargs(&nam, (caddr_t)args.addr, args.addrlen, MT_SONAME); 663 if (error) 664 return (error); 665 args.fh = nfh; 666 error = mountnfs(&args, mp, nam, pth, hst, &vp, p); 667 return (error); 668 } 669 670 /* 671 * Common code for mount and mountroot 672 */ 673 int 674 mountnfs(argp, mp, nam, pth, hst, vpp, p) 675 register struct nfs_args *argp; 676 register struct mount *mp; 677 struct mbuf *nam; 678 const char *pth, *hst; 679 struct vnode **vpp; 680 struct proc *p; 681 { 682 register struct nfsmount *nmp; 683 struct nfsnode *np; 684 int error; 685 struct vattr attrs; 686 struct ucred *cr; 687 688 if (mp->mnt_flag & MNT_UPDATE) { 689 nmp = VFSTONFS(mp); 690 /* update paths, file handles, etc, here XXX */ 691 m_freem(nam); 692 return (0); 693 } else { 694 MALLOC(nmp, struct nfsmount *, sizeof (struct nfsmount), 695 M_NFSMNT, M_WAITOK); 696 bzero((caddr_t)nmp, sizeof (struct nfsmount)); 697 mp->mnt_data = (qaddr_t)nmp; 698 TAILQ_INIT(&nmp->nm_uidlruhead); 699 TAILQ_INIT(&nmp->nm_bufq); 700 } 701 #ifdef Lite2_integrated 702 vfs_getnewfsid(mp, makefstype(MOUNT_NFS)); 703 #else 704 getnewfsid(mp, makefstype(MOUNT_NFS)); 705 #endif 706 nmp->nm_mountp = mp; 707 708 if (argp->flags & NFSMNT_NQNFS) 709 /* 710 * We have to set mnt_maxsymlink to a non-zero value so 711 * that COMPAT_43 routines will know that we are setting 712 * the d_type field in directories (and can zero it for 713 * unsuspecting binaries). 714 */ 715 mp->mnt_maxsymlinklen = 1; 716 717 if ((argp->flags & NFSMNT_NFSV3) == 0) 718 /* 719 * V2 can only handle 32 bit filesizes. For v3, nfs_fsinfo 720 * will fill this in. 721 */ 722 nmp->nm_maxfilesize = 0xffffffffLL; 723 724 nmp->nm_timeo = NFS_TIMEO; 725 nmp->nm_retry = NFS_RETRANS; 726 nmp->nm_wsize = NFS_WSIZE; 727 nmp->nm_rsize = NFS_RSIZE; 728 nmp->nm_readdirsize = NFS_READDIRSIZE; 729 nmp->nm_numgrps = NFS_MAXGRPS; 730 nmp->nm_readahead = NFS_DEFRAHEAD; 731 nmp->nm_leaseterm = NQ_DEFLEASE; 732 nmp->nm_deadthresh = NQ_DEADTHRESH; 733 CIRCLEQ_INIT(&nmp->nm_timerhead); 734 nmp->nm_inprog = NULLVP; 735 nmp->nm_fhsize = argp->fhsize; 736 bcopy((caddr_t)argp->fh, (caddr_t)nmp->nm_fh, argp->fhsize); 737 #ifdef COMPAT_09 738 mp->mnt_stat.f_type = 2; 739 #else 740 mp->mnt_stat.f_type = 0; 741 #endif 742 strncpy(&mp->mnt_stat.f_fstypename[0], mp->mnt_op->vfs_name, MFSNAMELEN); 743 bcopy(hst, mp->mnt_stat.f_mntfromname, MNAMELEN); 744 bcopy(pth, mp->mnt_stat.f_mntonname, MNAMELEN); 745 nmp->nm_nam = nam; 746 747 /* Set up the sockets and per-host congestion */ 748 nmp->nm_sotype = argp->sotype; 749 nmp->nm_soproto = argp->proto; 750 751 nfs_decode_args(nmp, argp); 752 753 /* 754 * For Connection based sockets (TCP,...) defer the connect until 755 * the first request, in case the server is not responding. 756 */ 757 if (nmp->nm_sotype == SOCK_DGRAM && 758 (error = nfs_connect(nmp, (struct nfsreq *)0))) 759 goto bad; 760 761 /* 762 * This is silly, but it has to be set so that vinifod() works. 763 * We do not want to do an nfs_statfs() here since we can get 764 * stuck on a dead server and we are holding a lock on the mount 765 * point. 766 */ 767 mp->mnt_stat.f_iosize = NFS_MAXDGRAMDATA; 768 /* 769 * A reference count is needed on the nfsnode representing the 770 * remote root. If this object is not persistent, then backward 771 * traversals of the mount point (i.e. "..") will not work if 772 * the nfsnode gets flushed out of the cache. Ufs does not have 773 * this problem, because one can identify root inodes by their 774 * number == ROOTINO (2). 775 */ 776 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np); 777 if (error) 778 goto bad; 779 *vpp = NFSTOV(np); 780 VOP_GETATTR(*vpp, &attrs, p->p_ucred, p); 781 if (nmp->nm_flag & NFSMNT_NFSV3) { 782 cr = crget(); 783 cr->cr_uid = attrs.va_uid; 784 cr->cr_gid = attrs.va_gid; 785 cr->cr_ngroups = 0; 786 nfs_cookieheuristic(*vpp, &nmp->nm_iflag, p, cr); 787 crfree(cr); 788 } 789 790 return (0); 791 bad: 792 nfs_disconnect(nmp); 793 free((caddr_t)nmp, M_NFSMNT); 794 m_freem(nam); 795 return (error); 796 } 797 798 /* 799 * unmount system call 800 */ 801 int 802 nfs_unmount(mp, mntflags, p) 803 struct mount *mp; 804 int mntflags; 805 struct proc *p; 806 { 807 register struct nfsmount *nmp; 808 struct nfsnode *np; 809 struct vnode *vp; 810 int error, flags = 0; 811 812 if (mntflags & MNT_FORCE) 813 flags |= FORCECLOSE; 814 nmp = VFSTONFS(mp); 815 /* 816 * Goes something like this.. 817 * - Check for activity on the root vnode (other than ourselves). 818 * - Call vflush() to clear out vnodes for this file system, 819 * except for the root vnode. 820 * - Decrement reference on the vnode representing remote root. 821 * - Close the socket 822 * - Free up the data structures 823 */ 824 /* 825 * We need to decrement the ref. count on the nfsnode representing 826 * the remote root. See comment in mountnfs(). The VFS unmount() 827 * has done vput on this vnode, otherwise we would get deadlock! 828 */ 829 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np); 830 if (error) 831 return(error); 832 vp = NFSTOV(np); 833 if ((mntflags & MNT_FORCE) == 0 && vp->v_usecount > 2) { 834 vput(vp); 835 return (EBUSY); 836 } 837 838 /* 839 * Must handshake with nqnfs_clientd() if it is active. 840 */ 841 nmp->nm_iflag |= NFSMNT_DISMINPROG; 842 while (nmp->nm_inprog != NULLVP) 843 (void) tsleep((caddr_t)&lbolt, PSOCK, "nfsdism", 0); 844 error = vflush(mp, vp, flags); 845 if (error) { 846 vput(vp); 847 nmp->nm_iflag &= ~NFSMNT_DISMINPROG; 848 return (error); 849 } 850 851 /* 852 * We are now committed to the unmount. 853 * For NQNFS, let the server daemon free the nfsmount structure. 854 */ 855 if (nmp->nm_flag & (NFSMNT_NQNFS | NFSMNT_KERB)) 856 nmp->nm_iflag |= NFSMNT_DISMNT; 857 858 /* 859 * There are two reference counts to get rid of here. 860 */ 861 vrele(vp); 862 vrele(vp); 863 vgone(vp); 864 nfs_disconnect(nmp); 865 m_freem(nmp->nm_nam); 866 867 if ((nmp->nm_flag & (NFSMNT_NQNFS | NFSMNT_KERB)) == 0) 868 free((caddr_t)nmp, M_NFSMNT); 869 return (0); 870 } 871 872 /* 873 * Return root of a filesystem 874 */ 875 int 876 nfs_root(mp, vpp) 877 struct mount *mp; 878 struct vnode **vpp; 879 { 880 register struct vnode *vp; 881 struct nfsmount *nmp; 882 struct nfsnode *np; 883 int error; 884 885 nmp = VFSTONFS(mp); 886 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np); 887 if (error) 888 return (error); 889 vp = NFSTOV(np); 890 if (vp->v_type == VNON) 891 vp->v_type = VDIR; 892 vp->v_flag = VROOT; 893 *vpp = vp; 894 return (0); 895 } 896 897 extern int syncprt; 898 899 /* 900 * Flush out the buffer cache 901 */ 902 /* ARGSUSED */ 903 int 904 nfs_sync(mp, waitfor, cred, p) 905 struct mount *mp; 906 int waitfor; 907 struct ucred *cred; 908 struct proc *p; 909 { 910 register struct vnode *vp; 911 int error, allerror = 0; 912 913 /* 914 * Force stale buffer cache information to be flushed. 915 */ 916 loop: 917 for (vp = mp->mnt_vnodelist.lh_first; 918 vp != NULL; 919 vp = vp->v_mntvnodes.le_next) { 920 /* 921 * If the vnode that we are about to sync is no longer 922 * associated with this mount point, start over. 923 */ 924 if (vp->v_mount != mp) 925 goto loop; 926 if (VOP_ISLOCKED(vp) || vp->v_dirtyblkhd.lh_first == NULL) 927 continue; 928 #ifdef Lite2_integrated 929 if (vget(vp, LK_EXCLUSIVE, p)) 930 #else 931 if (vget(vp, 1)) 932 #endif 933 goto loop; 934 error = VOP_FSYNC(vp, cred, waitfor, p); 935 if (error) 936 allerror = error; 937 vput(vp); 938 } 939 return (allerror); 940 } 941 942 /* 943 * NFS flat namespace lookup. 944 * Currently unsupported. 945 */ 946 /* ARGSUSED */ 947 int 948 nfs_vget(mp, ino, vpp) 949 struct mount *mp; 950 ino_t ino; 951 struct vnode **vpp; 952 { 953 954 return (EOPNOTSUPP); 955 } 956 957 #ifdef notyet 958 /* 959 * Do that sysctl thang... 960 */ 961 static int 962 nfs_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, void *newp, 963 size_t newlen, struct proc *p) 964 { 965 int rv; 966 967 /* 968 * All names at this level are terminal. 969 */ 970 if(namelen > 1) 971 return ENOTDIR; /* overloaded */ 972 973 switch(name[0]) { 974 case NFS_NFSSTATS: 975 if(!oldp) { 976 *oldlenp = sizeof nfsstats; 977 return 0; 978 } 979 980 if(*oldlenp < sizeof nfsstats) { 981 *oldlenp = sizeof nfsstats; 982 return ENOMEM; 983 } 984 985 rv = copyout(&nfsstats, oldp, sizeof nfsstats); 986 if(rv) return rv; 987 988 if(newp && newlen != sizeof nfsstats) 989 return EINVAL; 990 991 if(newp) { 992 return copyin(newp, &nfsstats, sizeof nfsstats); 993 } 994 return 0; 995 996 default: 997 return EOPNOTSUPP; 998 } 999 } 1000 #endif 1001 1002 1003 /* 1004 * At this point, this should never happen 1005 */ 1006 /* ARGSUSED */ 1007 int 1008 nfs_fhtovp(mp, fhp, nam, vpp, exflagsp, credanonp) 1009 register struct mount *mp; 1010 struct fid *fhp; 1011 struct mbuf *nam; 1012 struct vnode **vpp; 1013 int *exflagsp; 1014 struct ucred **credanonp; 1015 { 1016 1017 return (EINVAL); 1018 } 1019 1020 /* 1021 * Vnode pointer to File handle, should never happen either 1022 */ 1023 /* ARGSUSED */ 1024 int 1025 nfs_vptofh(vp, fhp) 1026 struct vnode *vp; 1027 struct fid *fhp; 1028 { 1029 1030 return (EINVAL); 1031 } 1032 1033 /* 1034 * Vfs start routine, a no-op. 1035 */ 1036 /* ARGSUSED */ 1037 int 1038 nfs_start(mp, flags, p) 1039 struct mount *mp; 1040 int flags; 1041 struct proc *p; 1042 { 1043 1044 return (0); 1045 } 1046 1047 /* 1048 * Do operations associated with quotas, not supported 1049 */ 1050 /* ARGSUSED */ 1051 int 1052 nfs_quotactl(mp, cmd, uid, arg, p) 1053 struct mount *mp; 1054 int cmd; 1055 uid_t uid; 1056 caddr_t arg; 1057 struct proc *p; 1058 { 1059 1060 return (EOPNOTSUPP); 1061 } 1062
Indexes created Thu Sep 25 16:09:42 GMT 2025