nfs_vfsops.c revision 1.74
1 /* $NetBSD: nfs_vfsops.c,v 1.74 1998/06/22 22:01:06 sommerfe 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 "opt_fifo.h" 42 43 #include <sys/param.h> 44 #include <sys/conf.h> 45 #include <sys/ioctl.h> 46 #include <sys/signal.h> 47 #include <sys/proc.h> 48 #include <sys/namei.h> 49 #include <sys/device.h> 50 #include <sys/vnode.h> 51 #include <sys/kernel.h> 52 #include <sys/mount.h> 53 #include <sys/buf.h> 54 #include <sys/mbuf.h> 55 #include <sys/socket.h> 56 #include <sys/socketvar.h> 57 #include <sys/systm.h> 58 59 #include <net/if.h> 60 #include <net/route.h> 61 #include <netinet/in.h> 62 63 #include <nfs/rpcv2.h> 64 #include <nfs/nfsproto.h> 65 #include <nfs/nfsnode.h> 66 #include <nfs/nfs.h> 67 #include <nfs/nfsmount.h> 68 #include <nfs/xdr_subs.h> 69 #include <nfs/nfsm_subs.h> 70 #include <nfs/nfsdiskless.h> 71 #include <nfs/nqnfs.h> 72 #include <nfs/nfs_var.h> 73 74 extern struct nfsstats nfsstats; 75 extern int nfs_ticks; 76 77 int nfs_sysctl __P((int *, u_int, void *, size_t *, void *, size_t, 78 struct proc *)); 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_sysctl, 113 nfs_mountroot, 114 nfs_vnodeopv_descs, 115 }; 116 117 extern u_int32_t nfs_procids[NFS_NPROCS]; 118 extern u_int32_t nfs_prog, nfs_vers; 119 120 static int nfs_mount_diskless __P((struct nfs_dlmount *, const char *, 121 struct mount **, struct vnode **, struct proc *)); 122 123 #define TRUE 1 124 #define FALSE 0 125 126 /* 127 * nfs statfs call 128 */ 129 int 130 nfs_statfs(mp, sbp, p) 131 struct mount *mp; 132 register struct statfs *sbp; 133 struct proc *p; 134 { 135 register struct vnode *vp; 136 register struct nfs_statfs *sfp; 137 register caddr_t cp; 138 register u_int32_t *tl; 139 register int32_t t1, t2; 140 caddr_t bpos, dpos, cp2; 141 struct nfsmount *nmp = VFSTONFS(mp); 142 int error = 0, v3 = (nmp->nm_flag & NFSMNT_NFSV3), retattr; 143 struct mbuf *mreq, *mrep = NULL, *md, *mb, *mb2; 144 struct ucred *cred; 145 struct nfsnode *np; 146 u_quad_t tquad; 147 148 #ifndef nolint 149 sfp = (struct nfs_statfs *)0; 150 #endif 151 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np); 152 if (error) 153 return (error); 154 vp = NFSTOV(np); 155 cred = crget(); 156 cred->cr_ngroups = 0; 157 if (v3 && (nmp->nm_iflag & NFSMNT_GOTFSINFO) == 0) 158 (void)nfs_fsinfo(nmp, vp, cred, p); 159 nfsstats.rpccnt[NFSPROC_FSSTAT]++; 160 nfsm_reqhead(vp, NFSPROC_FSSTAT, NFSX_FH(v3)); 161 nfsm_fhtom(vp, v3); 162 nfsm_request(vp, NFSPROC_FSSTAT, p, cred); 163 if (v3) 164 nfsm_postop_attr(vp, retattr); 165 if (error) { 166 if (mrep != NULL) 167 m_free(mrep); 168 goto nfsmout; 169 } 170 nfsm_dissect(sfp, struct nfs_statfs *, NFSX_STATFS(v3)); 171 #ifdef COMPAT_09 172 sbp->f_type = 2; 173 #else 174 sbp->f_type = 0; 175 #endif 176 sbp->f_flags = nmp->nm_flag; 177 sbp->f_iosize = min(nmp->nm_rsize, nmp->nm_wsize); 178 if (v3) { 179 sbp->f_bsize = NFS_FABLKSIZE; 180 fxdr_hyper(&sfp->sf_tbytes, &tquad); 181 sbp->f_blocks = (long)(tquad / ((u_quad_t)NFS_FABLKSIZE)); 182 fxdr_hyper(&sfp->sf_fbytes, &tquad); 183 sbp->f_bfree = (long)(tquad / ((u_quad_t)NFS_FABLKSIZE)); 184 fxdr_hyper(&sfp->sf_abytes, &tquad); 185 sbp->f_bavail = (long)(tquad / ((u_quad_t)NFS_FABLKSIZE)); 186 sbp->f_files = (fxdr_unsigned(int32_t, 187 sfp->sf_tfiles.nfsuquad[1]) & 0x7fffffff); 188 sbp->f_ffree = (fxdr_unsigned(int32_t, 189 sfp->sf_ffiles.nfsuquad[1]) & 0x7fffffff); 190 } else { 191 sbp->f_bsize = fxdr_unsigned(int32_t, sfp->sf_bsize); 192 sbp->f_blocks = fxdr_unsigned(int32_t, sfp->sf_blocks); 193 sbp->f_bfree = fxdr_unsigned(int32_t, sfp->sf_bfree); 194 sbp->f_bavail = fxdr_unsigned(int32_t, sfp->sf_bavail); 195 sbp->f_files = 0; 196 sbp->f_ffree = 0; 197 } 198 if (sbp != &mp->mnt_stat) { 199 bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN); 200 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); 201 } 202 strncpy(&sbp->f_fstypename[0], mp->mnt_op->vfs_name, MFSNAMELEN); 203 nfsm_reqdone; 204 vrele(vp); 205 crfree(cred); 206 return (error); 207 } 208 209 /* 210 * nfs version 3 fsinfo rpc call 211 */ 212 int 213 nfs_fsinfo(nmp, vp, cred, p) 214 register struct nfsmount *nmp; 215 register struct vnode *vp; 216 struct ucred *cred; 217 struct proc *p; 218 { 219 register struct nfsv3_fsinfo *fsp; 220 register caddr_t cp; 221 register int32_t t1, t2; 222 register u_int32_t *tl, pref, max; 223 caddr_t bpos, dpos, cp2; 224 int error = 0, retattr; 225 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 226 u_int64_t maxfsize; 227 228 nfsstats.rpccnt[NFSPROC_FSINFO]++; 229 nfsm_reqhead(vp, NFSPROC_FSINFO, NFSX_FH(1)); 230 nfsm_fhtom(vp, 1); 231 nfsm_request(vp, NFSPROC_FSINFO, p, cred); 232 nfsm_postop_attr(vp, retattr); 233 if (!error) { 234 nfsm_dissect(fsp, struct nfsv3_fsinfo *, NFSX_V3FSINFO); 235 pref = fxdr_unsigned(u_int32_t, fsp->fs_wtpref); 236 if (pref < nmp->nm_wsize && pref >= NFS_FABLKSIZE) 237 nmp->nm_wsize = (pref + NFS_FABLKSIZE - 1) & 238 ~(NFS_FABLKSIZE - 1); 239 max = fxdr_unsigned(u_int32_t, fsp->fs_wtmax); 240 if (max < nmp->nm_wsize && max > 0) { 241 nmp->nm_wsize = max & ~(NFS_FABLKSIZE - 1); 242 if (nmp->nm_wsize == 0) 243 nmp->nm_wsize = max; 244 } 245 pref = fxdr_unsigned(u_int32_t, fsp->fs_rtpref); 246 if (pref < nmp->nm_rsize && pref >= NFS_FABLKSIZE) 247 nmp->nm_rsize = (pref + NFS_FABLKSIZE - 1) & 248 ~(NFS_FABLKSIZE - 1); 249 max = fxdr_unsigned(u_int32_t, fsp->fs_rtmax); 250 if (max < nmp->nm_rsize && max > 0) { 251 nmp->nm_rsize = max & ~(NFS_FABLKSIZE - 1); 252 if (nmp->nm_rsize == 0) 253 nmp->nm_rsize = max; 254 } 255 pref = fxdr_unsigned(u_int32_t, fsp->fs_dtpref); 256 if (pref < nmp->nm_readdirsize && pref >= NFS_DIRFRAGSIZ) 257 nmp->nm_readdirsize = (pref + NFS_DIRFRAGSIZ - 1) & 258 ~(NFS_DIRFRAGSIZ - 1); 259 if (max < nmp->nm_readdirsize && max > 0) { 260 nmp->nm_readdirsize = max & ~(NFS_DIRFRAGSIZ - 1); 261 if (nmp->nm_readdirsize == 0) 262 nmp->nm_readdirsize = max; 263 } 264 /* XXX */ 265 nmp->nm_maxfilesize = (u_int64_t)0x80000000 * DEV_BSIZE - 1; 266 fxdr_hyper(&fsp->fs_maxfilesize, &maxfsize); 267 if (maxfsize > 0 && maxfsize < nmp->nm_maxfilesize) 268 nmp->nm_maxfilesize = maxfsize; 269 nmp->nm_iflag |= NFSMNT_GOTFSINFO; 270 } 271 nfsm_reqdone; 272 return (error); 273 } 274 275 /* 276 * Mount a remote root fs via. NFS. It goes like this: 277 * - Call nfs_boot_init() to fill in the nfs_diskless struct 278 * - build the rootfs mount point and call mountnfs() to do the rest. 279 */ 280 int 281 nfs_mountroot() 282 { 283 struct nfs_diskless *nd; 284 struct vattr attr; 285 struct mount *mp; 286 struct vnode *vp; 287 struct proc *procp; 288 long n; 289 int error; 290 291 procp = curproc; /* XXX */ 292 293 if (root_device->dv_class != DV_IFNET) 294 return (ENODEV); 295 296 /* 297 * XXX time must be non-zero when we init the interface or else 298 * the arp code will wedge. [Fixed now in if_ether.c] 299 * However, the NFS attribute cache gives false "hits" when 300 * time.tv_sec < NFS_ATTRTIMEO(np) so keep this in for now. 301 */ 302 if (time.tv_sec < NFS_MAXATTRTIMO) 303 time.tv_sec = NFS_MAXATTRTIMO; 304 305 /* 306 * Call nfs_boot_init() to fill in the nfs_diskless struct. 307 * Side effect: Finds and configures a network interface. 308 */ 309 nd = malloc(sizeof(*nd), M_NFSMNT, M_WAITOK); 310 bzero((caddr_t)nd, sizeof(*nd)); 311 error = nfs_boot_init(nd, procp); 312 if (error) 313 goto out; 314 315 /* 316 * Create the root mount point. 317 */ 318 error = nfs_mount_diskless(&nd->nd_root, "/", &mp, &vp, procp); 319 if (error) 320 goto out; 321 printf("root on %s\n", nd->nd_root.ndm_host); 322 323 /* 324 * Link it into the mount list. 325 */ 326 simple_lock(&mountlist_slock); 327 CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list); 328 simple_unlock(&mountlist_slock); 329 rootvp = vp; 330 mp->mnt_vnodecovered = NULLVP; 331 vfs_unbusy(mp); 332 333 /* Get root attributes (for the time). */ 334 error = VOP_GETATTR(vp, &attr, procp->p_ucred, procp); 335 if (error) 336 panic("nfs_mountroot: getattr for root"); 337 n = attr.va_mtime.tv_sec; 338 #ifdef DEBUG 339 printf("root time: 0x%lx\n", n); 340 #endif 341 inittodr(n); 342 343 #if 0 344 /* 345 * XXX splnet, so networks will receive... 346 * XXX Which port needed this hack? 347 * XXX Should already be at spl0. 348 */ 349 splnet(); 350 #endif 351 352 #if 0 /* swap now comes in from swapctl(2) */ 353 #ifdef notyet 354 /* Set up swap credentials. */ 355 proc0.p_ucred->cr_uid = 0; 356 proc0.p_ucred->cr_gid = 0; 357 proc0.p_ucred->cr_ngroups = 0; 358 #endif 359 360 /* 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 error = 0; 371 goto out; 372 } 373 374 /* 375 * If swapping to an nfs node: (swdevt[0].sw_dev == NODEV) 376 * Create a fake mount point just for the swap vnode so that the 377 * swap file can be on a different server from the rootfs. 378 */ 379 error = nfs_mount_diskless(&nd->nd_swap, "/swap", &mp, &vp, procp); 380 if (error) { 381 printf("nfs_boot: warning: mount(swap), error=%d\n", error); 382 error = 0; 383 goto out; 384 } 385 vfs_unbusy(mp); 386 printf("swap on %s\n", nd->nd_swap.ndm_host); 387 388 /* 389 * Since the swap file is not the root dir of a file system, 390 * hack it to a regular file. 391 */ 392 vp->v_type = VREG; 393 vp->v_flag = 0; 394 swdevt[0].sw_vp = vp; 395 396 /* 397 * Find out how large the swap file is. 398 */ 399 error = VOP_GETATTR(vp, &attr, procp->p_ucred, procp); 400 if (error) 401 panic("nfs_mountroot: getattr for swap"); 402 n = (long) (attr.va_size >> DEV_BSHIFT); 403 #ifdef DEBUG 404 printf("swap size: 0x%lx (blocks)\n", n); 405 #endif 406 swdevt[0].sw_nblks = n; 407 #endif 408 409 out: 410 free(nd, M_NFSMNT); 411 return (error); 412 } 413 414 /* 415 * Internal version of mount system call for diskless setup. 416 * Separate function because we used to call it twice. 417 * (once for root and once for swap) 418 */ 419 static int 420 nfs_mount_diskless(ndmntp, mntname, mpp, vpp, p) 421 struct nfs_dlmount *ndmntp; 422 const char *mntname; /* mount point name */ 423 struct mount **mpp; 424 struct vnode **vpp; 425 struct proc *p; 426 { 427 struct mount *mp; 428 struct mbuf *m; 429 int error; 430 431 vfs_rootmountalloc(MOUNT_NFS, (char *)mntname, &mp); 432 433 mp->mnt_op = &nfs_vfsops; 434 435 /* 436 * Historical practice expects NFS root file systems to 437 * be initially mounted r/w. 438 */ 439 mp->mnt_flag &= ~MNT_RDONLY; 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, p); 450 if (error) { 451 mp->mnt_op->vfs_refcount--; 452 vfs_unbusy(mp); 453 printf("nfs_mountroot: mount %s failed: %d\n", 454 mntname, error); 455 free(mp, M_MOUNT); 456 } else 457 *mpp = mp; 458 459 return (error); 460 } 461 462 void 463 nfs_decode_args(nmp, argp) 464 struct nfsmount *nmp; 465 struct nfs_args *argp; 466 { 467 int s; 468 int adjsock; 469 int maxio; 470 471 s = splsoftnet(); 472 473 /* 474 * Silently clear NFSMNT_NOCONN if it's a TCP mount, it makes 475 * no sense in that context. 476 */ 477 if (argp->sotype == SOCK_STREAM) 478 argp->flags &= ~NFSMNT_NOCONN; 479 480 /* 481 * Cookie translation is not needed for v2, silently ignore it. 482 */ 483 if ((argp->flags & (NFSMNT_XLATECOOKIE|NFSMNT_NFSV3)) == 484 NFSMNT_XLATECOOKIE) 485 argp->flags &= ~NFSMNT_XLATECOOKIE; 486 487 /* Re-bind if rsrvd port requested and wasn't on one */ 488 adjsock = !(nmp->nm_flag & NFSMNT_RESVPORT) 489 && (argp->flags & NFSMNT_RESVPORT); 490 /* Also re-bind if we're switching to/from a connected UDP socket */ 491 adjsock |= ((nmp->nm_flag & NFSMNT_NOCONN) != 492 (argp->flags & NFSMNT_NOCONN)); 493 494 /* Update flags atomically. Don't change the lock bits. */ 495 nmp->nm_flag = argp->flags | nmp->nm_flag; 496 splx(s); 497 498 if ((argp->flags & NFSMNT_TIMEO) && argp->timeo > 0) { 499 nmp->nm_timeo = (argp->timeo * NFS_HZ + 5) / 10; 500 if (nmp->nm_timeo < NFS_MINTIMEO) 501 nmp->nm_timeo = NFS_MINTIMEO; 502 else if (nmp->nm_timeo > NFS_MAXTIMEO) 503 nmp->nm_timeo = NFS_MAXTIMEO; 504 } 505 506 if ((argp->flags & NFSMNT_RETRANS) && argp->retrans > 1) { 507 nmp->nm_retry = argp->retrans; 508 if (nmp->nm_retry > NFS_MAXREXMIT) 509 nmp->nm_retry = NFS_MAXREXMIT; 510 } 511 512 if (argp->flags & NFSMNT_NFSV3) { 513 if (argp->sotype == SOCK_DGRAM) 514 maxio = NFS_MAXDGRAMDATA; 515 else 516 maxio = NFS_MAXDATA; 517 } else 518 maxio = NFS_V2MAXDATA; 519 520 if ((argp->flags & NFSMNT_WSIZE) && argp->wsize > 0) { 521 int osize = nmp->nm_wsize; 522 nmp->nm_wsize = argp->wsize; 523 /* Round down to multiple of blocksize */ 524 nmp->nm_wsize &= ~(NFS_FABLKSIZE - 1); 525 if (nmp->nm_wsize <= 0) 526 nmp->nm_wsize = NFS_FABLKSIZE; 527 adjsock |= (nmp->nm_wsize != osize); 528 } 529 if (nmp->nm_wsize > maxio) 530 nmp->nm_wsize = maxio; 531 if (nmp->nm_wsize > MAXBSIZE) 532 nmp->nm_wsize = MAXBSIZE; 533 534 if ((argp->flags & NFSMNT_RSIZE) && argp->rsize > 0) { 535 int osize = nmp->nm_rsize; 536 nmp->nm_rsize = argp->rsize; 537 /* Round down to multiple of blocksize */ 538 nmp->nm_rsize &= ~(NFS_FABLKSIZE - 1); 539 if (nmp->nm_rsize <= 0) 540 nmp->nm_rsize = NFS_FABLKSIZE; 541 adjsock |= (nmp->nm_rsize != osize); 542 } 543 if (nmp->nm_rsize > maxio) 544 nmp->nm_rsize = maxio; 545 if (nmp->nm_rsize > MAXBSIZE) 546 nmp->nm_rsize = MAXBSIZE; 547 548 if ((argp->flags & NFSMNT_READDIRSIZE) && argp->readdirsize > 0) { 549 nmp->nm_readdirsize = argp->readdirsize; 550 /* Round down to multiple of minimum blocksize */ 551 nmp->nm_readdirsize &= ~(NFS_DIRFRAGSIZ - 1); 552 if (nmp->nm_readdirsize < NFS_DIRFRAGSIZ) 553 nmp->nm_readdirsize = NFS_DIRFRAGSIZ; 554 /* Bigger than buffer size makes no sense */ 555 if (nmp->nm_readdirsize > NFS_DIRBLKSIZ) 556 nmp->nm_readdirsize = NFS_DIRBLKSIZ; 557 } else if (argp->flags & NFSMNT_RSIZE) 558 nmp->nm_readdirsize = nmp->nm_rsize; 559 560 if (nmp->nm_readdirsize > maxio) 561 nmp->nm_readdirsize = maxio; 562 563 if ((argp->flags & NFSMNT_MAXGRPS) && argp->maxgrouplist >= 0 && 564 argp->maxgrouplist <= NFS_MAXGRPS) 565 nmp->nm_numgrps = argp->maxgrouplist; 566 if ((argp->flags & NFSMNT_READAHEAD) && argp->readahead >= 0 && 567 argp->readahead <= NFS_MAXRAHEAD) 568 nmp->nm_readahead = argp->readahead; 569 if ((argp->flags & NFSMNT_LEASETERM) && argp->leaseterm >= 2 && 570 argp->leaseterm <= NQ_MAXLEASE) 571 nmp->nm_leaseterm = argp->leaseterm; 572 if ((argp->flags & NFSMNT_DEADTHRESH) && argp->deadthresh >= 1 && 573 argp->deadthresh <= NQ_NEVERDEAD) 574 nmp->nm_deadthresh = argp->deadthresh; 575 576 adjsock |= ((nmp->nm_sotype != argp->sotype) || 577 (nmp->nm_soproto != argp->proto)); 578 nmp->nm_sotype = argp->sotype; 579 nmp->nm_soproto = argp->proto; 580 581 if (nmp->nm_so && adjsock) { 582 nfs_safedisconnect(nmp); 583 if (nmp->nm_sotype == SOCK_DGRAM) 584 while (nfs_connect(nmp, (struct nfsreq *)0)) { 585 printf("nfs_args: retrying connect\n"); 586 (void) tsleep((caddr_t)&lbolt, 587 PSOCK, "nfscon", 0); 588 } 589 } 590 } 591 592 /* 593 * VFS Operations. 594 * 595 * mount system call 596 * It seems a bit dumb to copyinstr() the host and path here and then 597 * bcopy() them in mountnfs(), but I wanted to detect errors before 598 * doing the sockargs() call because sockargs() allocates an mbuf and 599 * an error after that means that I have to release the mbuf. 600 */ 601 /* ARGSUSED */ 602 int 603 nfs_mount(mp, path, data, ndp, p) 604 struct mount *mp; 605 const char *path; 606 void *data; 607 struct nameidata *ndp; 608 struct proc *p; 609 { 610 int error; 611 struct nfs_args args; 612 struct mbuf *nam; 613 struct vnode *vp; 614 char pth[MNAMELEN], hst[MNAMELEN]; 615 size_t len; 616 u_char nfh[NFSX_V3FHMAX]; 617 618 error = copyin(data, (caddr_t)&args, sizeof (struct nfs_args)); 619 if (error) 620 return (error); 621 if (args.version != NFS_ARGSVERSION) 622 return (EPROGMISMATCH); 623 if (mp->mnt_flag & MNT_UPDATE) { 624 register struct nfsmount *nmp = VFSTONFS(mp); 625 626 if (nmp == NULL) 627 return (EIO); 628 /* 629 * When doing an update, we can't change from or to 630 * v3 and/or nqnfs, or change cookie translation 631 */ 632 args.flags = (args.flags & 633 ~(NFSMNT_NFSV3|NFSMNT_NQNFS|NFSMNT_XLATECOOKIE)) | 634 (nmp->nm_flag & 635 (NFSMNT_NFSV3|NFSMNT_NQNFS|NFSMNT_XLATECOOKIE)); 636 nfs_decode_args(nmp, &args); 637 return (0); 638 } 639 error = copyin((caddr_t)args.fh, (caddr_t)nfh, args.fhsize); 640 if (error) 641 return (error); 642 error = copyinstr(path, pth, MNAMELEN-1, &len); 643 if (error) 644 return (error); 645 bzero(&pth[len], MNAMELEN - len); 646 error = copyinstr(args.hostname, hst, MNAMELEN-1, &len); 647 if (error) 648 return (error); 649 bzero(&hst[len], MNAMELEN - len); 650 /* sockargs() call must be after above copyin() calls */ 651 error = sockargs(&nam, (caddr_t)args.addr, args.addrlen, MT_SONAME); 652 if (error) 653 return (error); 654 args.fh = nfh; 655 error = mountnfs(&args, mp, nam, pth, hst, &vp, p); 656 return (error); 657 } 658 659 /* 660 * Common code for mount and mountroot 661 */ 662 int 663 mountnfs(argp, mp, nam, pth, hst, vpp, p) 664 register struct nfs_args *argp; 665 register struct mount *mp; 666 struct mbuf *nam; 667 const char *pth, *hst; 668 struct vnode **vpp; 669 struct proc *p; 670 { 671 register struct nfsmount *nmp; 672 struct nfsnode *np; 673 int error; 674 struct vattr attrs; 675 struct ucred *cr; 676 677 if (mp->mnt_flag & MNT_UPDATE) { 678 nmp = VFSTONFS(mp); 679 /* update paths, file handles, etc, here XXX */ 680 m_freem(nam); 681 return (0); 682 } else { 683 MALLOC(nmp, struct nfsmount *, sizeof (struct nfsmount), 684 M_NFSMNT, M_WAITOK); 685 bzero((caddr_t)nmp, sizeof (struct nfsmount)); 686 mp->mnt_data = (qaddr_t)nmp; 687 TAILQ_INIT(&nmp->nm_uidlruhead); 688 TAILQ_INIT(&nmp->nm_bufq); 689 } 690 vfs_getnewfsid(mp, MOUNT_NFS); 691 nmp->nm_mountp = mp; 692 693 if (argp->flags & NFSMNT_NQNFS) 694 /* 695 * We have to set mnt_maxsymlink to a non-zero value so 696 * that COMPAT_43 routines will know that we are setting 697 * the d_type field in directories (and can zero it for 698 * unsuspecting binaries). 699 */ 700 mp->mnt_maxsymlinklen = 1; 701 702 if ((argp->flags & NFSMNT_NFSV3) == 0) 703 /* 704 * V2 can only handle 32 bit filesizes. For v3, nfs_fsinfo 705 * will fill this in. 706 */ 707 nmp->nm_maxfilesize = 0xffffffffLL; 708 709 nmp->nm_timeo = NFS_TIMEO; 710 nmp->nm_retry = NFS_RETRANS; 711 nmp->nm_wsize = NFS_WSIZE; 712 nmp->nm_rsize = NFS_RSIZE; 713 nmp->nm_readdirsize = NFS_READDIRSIZE; 714 nmp->nm_numgrps = NFS_MAXGRPS; 715 nmp->nm_readahead = NFS_DEFRAHEAD; 716 nmp->nm_leaseterm = NQ_DEFLEASE; 717 nmp->nm_deadthresh = NQ_DEADTHRESH; 718 CIRCLEQ_INIT(&nmp->nm_timerhead); 719 nmp->nm_inprog = NULLVP; 720 nmp->nm_fhsize = argp->fhsize; 721 bcopy((caddr_t)argp->fh, (caddr_t)nmp->nm_fh, argp->fhsize); 722 #ifdef COMPAT_09 723 mp->mnt_stat.f_type = 2; 724 #else 725 mp->mnt_stat.f_type = 0; 726 #endif 727 strncpy(&mp->mnt_stat.f_fstypename[0], mp->mnt_op->vfs_name, 728 MFSNAMELEN); 729 bcopy(hst, mp->mnt_stat.f_mntfromname, MNAMELEN); 730 bcopy(pth, mp->mnt_stat.f_mntonname, MNAMELEN); 731 nmp->nm_nam = nam; 732 733 /* Set up the sockets and per-host congestion */ 734 nmp->nm_sotype = argp->sotype; 735 nmp->nm_soproto = argp->proto; 736 737 nfs_decode_args(nmp, argp); 738 739 /* 740 * For Connection based sockets (TCP,...) defer the connect until 741 * the first request, in case the server is not responding. 742 */ 743 if (nmp->nm_sotype == SOCK_DGRAM && 744 (error = nfs_connect(nmp, (struct nfsreq *)0))) 745 goto bad; 746 747 /* 748 * This is silly, but it has to be set so that vinifod() works. 749 * We do not want to do an nfs_statfs() here since we can get 750 * stuck on a dead server and we are holding a lock on the mount 751 * point. 752 */ 753 mp->mnt_stat.f_iosize = NFS_MAXDGRAMDATA; 754 /* 755 * A reference count is needed on the nfsnode representing the 756 * remote root. If this object is not persistent, then backward 757 * traversals of the mount point (i.e. "..") will not work if 758 * the nfsnode gets flushed out of the cache. Ufs does not have 759 * this problem, because one can identify root inodes by their 760 * number == ROOTINO (2). 761 */ 762 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np); 763 if (error) 764 goto bad; 765 *vpp = NFSTOV(np); 766 VOP_GETATTR(*vpp, &attrs, p->p_ucred, p); 767 if ((nmp->nm_flag & NFSMNT_NFSV3) && ((*vpp)->v_type == VDIR)) { 768 cr = crget(); 769 cr->cr_uid = attrs.va_uid; 770 cr->cr_gid = attrs.va_gid; 771 cr->cr_ngroups = 0; 772 nfs_cookieheuristic(*vpp, &nmp->nm_iflag, p, cr); 773 crfree(cr); 774 } 775 776 return (0); 777 bad: 778 nfs_disconnect(nmp); 779 free((caddr_t)nmp, M_NFSMNT); 780 m_freem(nam); 781 return (error); 782 } 783 784 /* 785 * unmount system call 786 */ 787 int 788 nfs_unmount(mp, mntflags, p) 789 struct mount *mp; 790 int mntflags; 791 struct proc *p; 792 { 793 register struct nfsmount *nmp; 794 struct nfsnode *np; 795 struct vnode *vp; 796 int error, flags = 0; 797 798 if (mntflags & MNT_FORCE) 799 flags |= FORCECLOSE; 800 nmp = VFSTONFS(mp); 801 /* 802 * Goes something like this.. 803 * - Check for activity on the root vnode (other than ourselves). 804 * - Call vflush() to clear out vnodes for this file system, 805 * except for the root vnode. 806 * - Decrement reference on the vnode representing remote root. 807 * - Close the socket 808 * - Free up the data structures 809 */ 810 /* 811 * We need to decrement the ref. count on the nfsnode representing 812 * the remote root. See comment in mountnfs(). The VFS unmount() 813 * has done vput on this vnode, otherwise we would get deadlock! 814 */ 815 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np); 816 if (error) 817 return(error); 818 vp = NFSTOV(np); 819 if ((mntflags & MNT_FORCE) == 0 && vp->v_usecount > 2) { 820 vput(vp); 821 return (EBUSY); 822 } 823 824 /* 825 * Must handshake with nqnfs_clientd() if it is active. 826 */ 827 nmp->nm_iflag |= NFSMNT_DISMINPROG; 828 while (nmp->nm_inprog != NULLVP) 829 (void) tsleep((caddr_t)&lbolt, PSOCK, "nfsdism", 0); 830 error = vflush(mp, vp, flags); 831 if (error) { 832 vput(vp); 833 nmp->nm_iflag &= ~NFSMNT_DISMINPROG; 834 return (error); 835 } 836 837 /* 838 * We are now committed to the unmount. 839 * For NQNFS, let the server daemon free the nfsmount structure. 840 */ 841 if (nmp->nm_flag & (NFSMNT_NQNFS | NFSMNT_KERB)) 842 nmp->nm_iflag |= NFSMNT_DISMNT; 843 844 /* 845 * There are two reference counts to get rid of here. 846 */ 847 vrele(vp); 848 vrele(vp); 849 vgone(vp); 850 nfs_disconnect(nmp); 851 m_freem(nmp->nm_nam); 852 853 if ((nmp->nm_flag & (NFSMNT_NQNFS | NFSMNT_KERB)) == 0) 854 free((caddr_t)nmp, M_NFSMNT); 855 return (0); 856 } 857 858 /* 859 * Return root of a filesystem 860 */ 861 int 862 nfs_root(mp, vpp) 863 struct mount *mp; 864 struct vnode **vpp; 865 { 866 register struct vnode *vp; 867 struct nfsmount *nmp; 868 struct nfsnode *np; 869 int error; 870 871 nmp = VFSTONFS(mp); 872 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np); 873 if (error) 874 return (error); 875 vp = NFSTOV(np); 876 if (vp->v_type == VNON) 877 vp->v_type = VDIR; 878 vp->v_flag = VROOT; 879 *vpp = vp; 880 return (0); 881 } 882 883 extern int syncprt; 884 885 /* 886 * Flush out the buffer cache 887 */ 888 /* ARGSUSED */ 889 int 890 nfs_sync(mp, waitfor, cred, p) 891 struct mount *mp; 892 int waitfor; 893 struct ucred *cred; 894 struct proc *p; 895 { 896 register struct vnode *vp; 897 int error, allerror = 0; 898 899 /* 900 * Force stale buffer cache information to be flushed. 901 */ 902 loop: 903 for (vp = mp->mnt_vnodelist.lh_first; 904 vp != NULL; 905 vp = vp->v_mntvnodes.le_next) { 906 /* 907 * If the vnode that we are about to sync is no longer 908 * associated with this mount point, start over. 909 */ 910 if (vp->v_mount != mp) 911 goto loop; 912 if (VOP_ISLOCKED(vp) || vp->v_dirtyblkhd.lh_first == NULL) 913 continue; 914 if (vget(vp, LK_EXCLUSIVE)) 915 goto loop; 916 error = VOP_FSYNC(vp, cred, 917 waitfor == MNT_WAIT ? FSYNC_WAIT : 0, 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 /* 941 * Do that sysctl thang... 942 */ 943 int 944 nfs_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 945 int *name; 946 u_int namelen; 947 void *oldp; 948 size_t *oldlenp; 949 void *newp; 950 size_t newlen; 951 struct proc *p; 952 { 953 int rv; 954 955 /* 956 * All names at this level are terminal. 957 */ 958 if(namelen > 1) 959 return ENOTDIR; /* overloaded */ 960 961 switch(name[0]) { 962 case NFS_NFSSTATS: 963 if(!oldp) { 964 *oldlenp = sizeof nfsstats; 965 return 0; 966 } 967 968 if(*oldlenp < sizeof nfsstats) { 969 *oldlenp = sizeof nfsstats; 970 return ENOMEM; 971 } 972 973 rv = copyout(&nfsstats, oldp, sizeof nfsstats); 974 if(rv) return rv; 975 976 if(newp && newlen != sizeof nfsstats) 977 return EINVAL; 978 979 if(newp) { 980 return copyin(newp, &nfsstats, sizeof nfsstats); 981 } 982 return 0; 983 984 default: 985 return EOPNOTSUPP; 986 } 987 } 988 989 990 /* 991 * At this point, this should never happen 992 */ 993 /* ARGSUSED */ 994 int 995 nfs_fhtovp(mp, fhp, nam, vpp, exflagsp, credanonp) 996 register struct mount *mp; 997 struct fid *fhp; 998 struct mbuf *nam; 999 struct vnode **vpp; 1000 int *exflagsp; 1001 struct ucred **credanonp; 1002 { 1003 1004 return (EINVAL); 1005 } 1006 1007 /* 1008 * Vnode pointer to File handle, should never happen either 1009 */ 1010 /* ARGSUSED */ 1011 int 1012 nfs_vptofh(vp, fhp) 1013 struct vnode *vp; 1014 struct fid *fhp; 1015 { 1016 1017 return (EINVAL); 1018 } 1019 1020 /* 1021 * Vfs start routine, a no-op. 1022 */ 1023 /* ARGSUSED */ 1024 int 1025 nfs_start(mp, flags, p) 1026 struct mount *mp; 1027 int flags; 1028 struct proc *p; 1029 { 1030 1031 return (0); 1032 } 1033 1034 /* 1035 * Do operations associated with quotas, not supported 1036 */ 1037 /* ARGSUSED */ 1038 int 1039 nfs_quotactl(mp, cmd, uid, arg, p) 1040 struct mount *mp; 1041 int cmd; 1042 uid_t uid; 1043 caddr_t arg; 1044 struct proc *p; 1045 { 1046 1047 return (EOPNOTSUPP); 1048 } 1049
Indexes created Tue Sep 23 22:09:46 GMT 2025