nfs_vfsops.c revision 1.86
1 /* $NetBSD: nfs_vfsops.c,v 1.86 2000/03/16 18:08:30 jdolecek 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 #if defined(_KERNEL) && !defined(_LKM) 42 #include "opt_compat_netbsd.h" 43 #endif 44 45 #include <sys/param.h> 46 #include <sys/conf.h> 47 #include <sys/ioctl.h> 48 #include <sys/signal.h> 49 #include <sys/proc.h> 50 #include <sys/namei.h> 51 #include <sys/device.h> 52 #include <sys/vnode.h> 53 #include <sys/kernel.h> 54 #include <sys/mount.h> 55 #include <sys/buf.h> 56 #include <sys/mbuf.h> 57 #include <sys/socket.h> 58 #include <sys/socketvar.h> 59 #include <sys/systm.h> 60 61 #include <net/if.h> 62 #include <net/route.h> 63 #include <netinet/in.h> 64 65 #include <nfs/rpcv2.h> 66 #include <nfs/nfsproto.h> 67 #include <nfs/nfsnode.h> 68 #include <nfs/nfs.h> 69 #include <nfs/nfsmount.h> 70 #include <nfs/xdr_subs.h> 71 #include <nfs/nfsm_subs.h> 72 #include <nfs/nfsdiskless.h> 73 #include <nfs/nqnfs.h> 74 #include <nfs/nfs_var.h> 75 76 extern struct nfsstats nfsstats; 77 extern int nfs_ticks; 78 79 int nfs_sysctl __P((int *, u_int, void *, size_t *, void *, size_t, 80 struct proc *)); 81 82 /* 83 * nfs vfs operations. 84 */ 85 86 extern struct vnodeopv_desc nfsv2_vnodeop_opv_desc; 87 extern struct vnodeopv_desc spec_nfsv2nodeop_opv_desc; 88 extern struct vnodeopv_desc fifo_nfsv2nodeop_opv_desc; 89 90 struct vnodeopv_desc *nfs_vnodeopv_descs[] = { 91 &nfsv2_vnodeop_opv_desc, 92 &spec_nfsv2nodeop_opv_desc, 93 &fifo_nfsv2nodeop_opv_desc, 94 NULL, 95 }; 96 97 struct vfsops nfs_vfsops = { 98 MOUNT_NFS, 99 nfs_mount, 100 nfs_start, 101 nfs_unmount, 102 nfs_root, 103 nfs_quotactl, 104 nfs_statfs, 105 nfs_sync, 106 nfs_vget, 107 nfs_fhtovp, 108 nfs_vptofh, 109 nfs_vfs_init, 110 nfs_vfs_done, 111 nfs_sysctl, 112 nfs_mountroot, 113 nfs_checkexp, 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 tquad = fxdr_hyper(&sfp->sf_tbytes); 181 sbp->f_blocks = (long)((quad_t)tquad / (quad_t)NFS_FABLKSIZE); 182 tquad = fxdr_hyper(&sfp->sf_fbytes); 183 sbp->f_bfree = (long)((quad_t)tquad / (quad_t)NFS_FABLKSIZE); 184 tquad = fxdr_hyper(&sfp->sf_abytes); 185 sbp->f_bavail = (long)((quad_t)tquad / (quad_t)NFS_FABLKSIZE); 186 tquad = fxdr_hyper(&sfp->sf_tfiles); 187 sbp->f_files = (long)tquad; 188 tquad = fxdr_hyper(&sfp->sf_ffiles); 189 sbp->f_ffree = (long)tquad; 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 memcpy(sbp->f_mntonname, mp->mnt_stat.f_mntonname, MNAMELEN); 200 memcpy(sbp->f_mntfromname, mp->mnt_stat.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 maxfsize = fxdr_hyper(&fsp->fs_maxfilesize); 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 memset((caddr_t)nd, 0, sizeof(*nd)); 311 error = nfs_boot_init(nd, procp); 312 if (error) { 313 free(nd, M_NFSMNT); 314 return (error); 315 } 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 simple_lock(&mountlist_slock); 329 CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list); 330 simple_unlock(&mountlist_slock); 331 rootvp = vp; 332 mp->mnt_vnodecovered = NULLVP; 333 vfs_unbusy(mp); 334 335 /* Get root attributes (for the time). */ 336 error = VOP_GETATTR(vp, &attr, procp->p_ucred, procp); 337 if (error) 338 panic("nfs_mountroot: getattr for root"); 339 n = attr.va_atime.tv_sec; 340 #ifdef DEBUG 341 printf("root time: 0x%lx\n", n); 342 #endif 343 inittodr(n); 344 345 out: 346 if (error) 347 nfs_boot_cleanup(nd, procp); 348 free(nd, M_NFSMNT); 349 return (error); 350 } 351 352 /* 353 * Internal version of mount system call for diskless setup. 354 * Separate function because we used to call it twice. 355 * (once for root and once for swap) 356 */ 357 static int 358 nfs_mount_diskless(ndmntp, mntname, mpp, vpp, p) 359 struct nfs_dlmount *ndmntp; 360 const char *mntname; /* mount point name */ 361 struct mount **mpp; 362 struct vnode **vpp; 363 struct proc *p; 364 { 365 struct mount *mp; 366 struct mbuf *m; 367 int error; 368 369 vfs_rootmountalloc(MOUNT_NFS, (char *)mntname, &mp); 370 371 mp->mnt_op = &nfs_vfsops; 372 373 /* 374 * Historical practice expects NFS root file systems to 375 * be initially mounted r/w. 376 */ 377 mp->mnt_flag &= ~MNT_RDONLY; 378 379 /* Get mbuf for server sockaddr. */ 380 m = m_get(M_WAIT, MT_SONAME); 381 if (m == NULL) 382 panic("nfs_mountroot: mget soname for %s", mntname); 383 memcpy(mtod(m, caddr_t), (caddr_t)ndmntp->ndm_args.addr, 384 (m->m_len = ndmntp->ndm_args.addr->sa_len)); 385 386 error = mountnfs(&ndmntp->ndm_args, mp, m, mntname, 387 ndmntp->ndm_args.hostname, vpp, p); 388 if (error) { 389 mp->mnt_op->vfs_refcount--; 390 vfs_unbusy(mp); 391 printf("nfs_mountroot: mount %s failed: %d\n", 392 mntname, error); 393 free(mp, M_MOUNT); 394 } else 395 *mpp = mp; 396 397 return (error); 398 } 399 400 void 401 nfs_decode_args(nmp, argp) 402 struct nfsmount *nmp; 403 struct nfs_args *argp; 404 { 405 int s; 406 int adjsock; 407 int maxio; 408 409 s = splsoftnet(); 410 411 /* 412 * Silently clear NFSMNT_NOCONN if it's a TCP mount, it makes 413 * no sense in that context. 414 */ 415 if (argp->sotype == SOCK_STREAM) 416 argp->flags &= ~NFSMNT_NOCONN; 417 418 /* 419 * Cookie translation is not needed for v2, silently ignore it. 420 */ 421 if ((argp->flags & (NFSMNT_XLATECOOKIE|NFSMNT_NFSV3)) == 422 NFSMNT_XLATECOOKIE) 423 argp->flags &= ~NFSMNT_XLATECOOKIE; 424 425 /* Re-bind if rsrvd port requested and wasn't on one */ 426 adjsock = !(nmp->nm_flag & NFSMNT_RESVPORT) 427 && (argp->flags & NFSMNT_RESVPORT); 428 /* Also re-bind if we're switching to/from a connected UDP socket */ 429 adjsock |= ((nmp->nm_flag & NFSMNT_NOCONN) != 430 (argp->flags & NFSMNT_NOCONN)); 431 432 /* Update flags atomically. Don't change the lock bits. */ 433 nmp->nm_flag = argp->flags | nmp->nm_flag; 434 splx(s); 435 436 if ((argp->flags & NFSMNT_TIMEO) && argp->timeo > 0) { 437 nmp->nm_timeo = (argp->timeo * NFS_HZ + 5) / 10; 438 if (nmp->nm_timeo < NFS_MINTIMEO) 439 nmp->nm_timeo = NFS_MINTIMEO; 440 else if (nmp->nm_timeo > NFS_MAXTIMEO) 441 nmp->nm_timeo = NFS_MAXTIMEO; 442 } 443 444 if ((argp->flags & NFSMNT_RETRANS) && argp->retrans > 1) { 445 nmp->nm_retry = argp->retrans; 446 if (nmp->nm_retry > NFS_MAXREXMIT) 447 nmp->nm_retry = NFS_MAXREXMIT; 448 } 449 450 if (argp->flags & NFSMNT_NFSV3) { 451 if (argp->sotype == SOCK_DGRAM) 452 maxio = NFS_MAXDGRAMDATA; 453 else 454 maxio = NFS_MAXDATA; 455 } else 456 maxio = NFS_V2MAXDATA; 457 458 if ((argp->flags & NFSMNT_WSIZE) && argp->wsize > 0) { 459 int osize = nmp->nm_wsize; 460 nmp->nm_wsize = argp->wsize; 461 /* Round down to multiple of blocksize */ 462 nmp->nm_wsize &= ~(NFS_FABLKSIZE - 1); 463 if (nmp->nm_wsize <= 0) 464 nmp->nm_wsize = NFS_FABLKSIZE; 465 adjsock |= (nmp->nm_wsize != osize); 466 } 467 if (nmp->nm_wsize > maxio) 468 nmp->nm_wsize = maxio; 469 if (nmp->nm_wsize > MAXBSIZE) 470 nmp->nm_wsize = MAXBSIZE; 471 472 if ((argp->flags & NFSMNT_RSIZE) && argp->rsize > 0) { 473 int osize = nmp->nm_rsize; 474 nmp->nm_rsize = argp->rsize; 475 /* Round down to multiple of blocksize */ 476 nmp->nm_rsize &= ~(NFS_FABLKSIZE - 1); 477 if (nmp->nm_rsize <= 0) 478 nmp->nm_rsize = NFS_FABLKSIZE; 479 adjsock |= (nmp->nm_rsize != osize); 480 } 481 if (nmp->nm_rsize > maxio) 482 nmp->nm_rsize = maxio; 483 if (nmp->nm_rsize > MAXBSIZE) 484 nmp->nm_rsize = MAXBSIZE; 485 486 if ((argp->flags & NFSMNT_READDIRSIZE) && argp->readdirsize > 0) { 487 nmp->nm_readdirsize = argp->readdirsize; 488 /* Round down to multiple of minimum blocksize */ 489 nmp->nm_readdirsize &= ~(NFS_DIRFRAGSIZ - 1); 490 if (nmp->nm_readdirsize < NFS_DIRFRAGSIZ) 491 nmp->nm_readdirsize = NFS_DIRFRAGSIZ; 492 /* Bigger than buffer size makes no sense */ 493 if (nmp->nm_readdirsize > NFS_DIRBLKSIZ) 494 nmp->nm_readdirsize = NFS_DIRBLKSIZ; 495 } else if (argp->flags & NFSMNT_RSIZE) 496 nmp->nm_readdirsize = nmp->nm_rsize; 497 498 if (nmp->nm_readdirsize > maxio) 499 nmp->nm_readdirsize = maxio; 500 501 if ((argp->flags & NFSMNT_MAXGRPS) && argp->maxgrouplist >= 0 && 502 argp->maxgrouplist <= NFS_MAXGRPS) 503 nmp->nm_numgrps = argp->maxgrouplist; 504 if ((argp->flags & NFSMNT_READAHEAD) && argp->readahead >= 0 && 505 argp->readahead <= NFS_MAXRAHEAD) 506 nmp->nm_readahead = argp->readahead; 507 if ((argp->flags & NFSMNT_LEASETERM) && argp->leaseterm >= 2 && 508 argp->leaseterm <= NQ_MAXLEASE) 509 nmp->nm_leaseterm = argp->leaseterm; 510 if ((argp->flags & NFSMNT_DEADTHRESH) && argp->deadthresh >= 1 && 511 argp->deadthresh <= NQ_NEVERDEAD) 512 nmp->nm_deadthresh = argp->deadthresh; 513 514 adjsock |= ((nmp->nm_sotype != argp->sotype) || 515 (nmp->nm_soproto != argp->proto)); 516 nmp->nm_sotype = argp->sotype; 517 nmp->nm_soproto = argp->proto; 518 519 if (nmp->nm_so && adjsock) { 520 nfs_safedisconnect(nmp); 521 if (nmp->nm_sotype == SOCK_DGRAM) 522 while (nfs_connect(nmp, (struct nfsreq *)0)) { 523 printf("nfs_args: retrying connect\n"); 524 (void) tsleep((caddr_t)&lbolt, 525 PSOCK, "nfscn3", 0); 526 } 527 } 528 } 529 530 /* 531 * VFS Operations. 532 * 533 * mount system call 534 * It seems a bit dumb to copyinstr() the host and path here and then 535 * memcpy() them in mountnfs(), but I wanted to detect errors before 536 * doing the sockargs() call because sockargs() allocates an mbuf and 537 * an error after that means that I have to release the mbuf. 538 */ 539 /* ARGSUSED */ 540 int 541 nfs_mount(mp, path, data, ndp, p) 542 struct mount *mp; 543 const char *path; 544 void *data; 545 struct nameidata *ndp; 546 struct proc *p; 547 { 548 int error; 549 struct nfs_args args; 550 struct mbuf *nam; 551 struct vnode *vp; 552 char pth[MNAMELEN], hst[MNAMELEN]; 553 size_t len; 554 u_char nfh[NFSX_V3FHMAX]; 555 556 error = copyin(data, (caddr_t)&args, sizeof (struct nfs_args)); 557 if (error) 558 return (error); 559 if (args.version != NFS_ARGSVERSION) 560 return (EPROGMISMATCH); 561 if (mp->mnt_flag & MNT_UPDATE) { 562 register struct nfsmount *nmp = VFSTONFS(mp); 563 564 if (nmp == NULL) 565 return (EIO); 566 /* 567 * When doing an update, we can't change from or to 568 * v3 and/or nqnfs, or change cookie translation 569 */ 570 args.flags = (args.flags & 571 ~(NFSMNT_NFSV3|NFSMNT_NQNFS|NFSMNT_XLATECOOKIE)) | 572 (nmp->nm_flag & 573 (NFSMNT_NFSV3|NFSMNT_NQNFS|NFSMNT_XLATECOOKIE)); 574 nfs_decode_args(nmp, &args); 575 return (0); 576 } 577 error = copyin((caddr_t)args.fh, (caddr_t)nfh, args.fhsize); 578 if (error) 579 return (error); 580 error = copyinstr(path, pth, MNAMELEN-1, &len); 581 if (error) 582 return (error); 583 memset(&pth[len], 0, MNAMELEN - len); 584 error = copyinstr(args.hostname, hst, MNAMELEN-1, &len); 585 if (error) 586 return (error); 587 memset(&hst[len], 0, MNAMELEN - len); 588 /* sockargs() call must be after above copyin() calls */ 589 error = sockargs(&nam, (caddr_t)args.addr, args.addrlen, MT_SONAME); 590 if (error) 591 return (error); 592 args.fh = nfh; 593 error = mountnfs(&args, mp, nam, pth, hst, &vp, p); 594 return (error); 595 } 596 597 /* 598 * Common code for mount and mountroot 599 */ 600 int 601 mountnfs(argp, mp, nam, pth, hst, vpp, p) 602 register struct nfs_args *argp; 603 register struct mount *mp; 604 struct mbuf *nam; 605 const char *pth, *hst; 606 struct vnode **vpp; 607 struct proc *p; 608 { 609 register struct nfsmount *nmp; 610 struct nfsnode *np; 611 int error; 612 struct vattr attrs; 613 struct ucred *cr; 614 615 if (mp->mnt_flag & MNT_UPDATE) { 616 nmp = VFSTONFS(mp); 617 /* update paths, file handles, etc, here XXX */ 618 m_freem(nam); 619 return (0); 620 } else { 621 MALLOC(nmp, struct nfsmount *, sizeof (struct nfsmount), 622 M_NFSMNT, M_WAITOK); 623 memset((caddr_t)nmp, 0, sizeof (struct nfsmount)); 624 mp->mnt_data = (qaddr_t)nmp; 625 TAILQ_INIT(&nmp->nm_uidlruhead); 626 TAILQ_INIT(&nmp->nm_bufq); 627 } 628 vfs_getnewfsid(mp, MOUNT_NFS); 629 nmp->nm_mountp = mp; 630 631 if (argp->flags & NFSMNT_NQNFS) 632 /* 633 * We have to set mnt_maxsymlink to a non-zero value so 634 * that COMPAT_43 routines will know that we are setting 635 * the d_type field in directories (and can zero it for 636 * unsuspecting binaries). 637 */ 638 mp->mnt_maxsymlinklen = 1; 639 640 if ((argp->flags & NFSMNT_NFSV3) == 0) 641 /* 642 * V2 can only handle 32 bit filesizes. For v3, nfs_fsinfo 643 * will fill this in. 644 */ 645 nmp->nm_maxfilesize = 0xffffffffLL; 646 647 nmp->nm_timeo = NFS_TIMEO; 648 nmp->nm_retry = NFS_RETRANS; 649 nmp->nm_wsize = NFS_WSIZE; 650 nmp->nm_rsize = NFS_RSIZE; 651 nmp->nm_readdirsize = NFS_READDIRSIZE; 652 nmp->nm_numgrps = NFS_MAXGRPS; 653 nmp->nm_readahead = NFS_DEFRAHEAD; 654 nmp->nm_leaseterm = NQ_DEFLEASE; 655 nmp->nm_deadthresh = NQ_DEADTHRESH; 656 CIRCLEQ_INIT(&nmp->nm_timerhead); 657 nmp->nm_inprog = NULLVP; 658 nmp->nm_fhsize = argp->fhsize; 659 memcpy((caddr_t)nmp->nm_fh, (caddr_t)argp->fh, argp->fhsize); 660 #ifdef COMPAT_09 661 mp->mnt_stat.f_type = 2; 662 #else 663 mp->mnt_stat.f_type = 0; 664 #endif 665 strncpy(&mp->mnt_stat.f_fstypename[0], mp->mnt_op->vfs_name, 666 MFSNAMELEN); 667 memcpy(mp->mnt_stat.f_mntfromname, hst, MNAMELEN); 668 memcpy(mp->mnt_stat.f_mntonname, pth, MNAMELEN); 669 nmp->nm_nam = nam; 670 671 /* Set up the sockets and per-host congestion */ 672 nmp->nm_sotype = argp->sotype; 673 nmp->nm_soproto = argp->proto; 674 675 nfs_decode_args(nmp, argp); 676 677 /* 678 * For Connection based sockets (TCP,...) defer the connect until 679 * the first request, in case the server is not responding. 680 */ 681 if (nmp->nm_sotype == SOCK_DGRAM && 682 (error = nfs_connect(nmp, (struct nfsreq *)0))) 683 goto bad; 684 685 /* 686 * This is silly, but it has to be set so that vinifod() works. 687 * We do not want to do an nfs_statfs() here since we can get 688 * stuck on a dead server and we are holding a lock on the mount 689 * point. 690 */ 691 mp->mnt_stat.f_iosize = NFS_MAXDGRAMDATA; 692 /* 693 * A reference count is needed on the nfsnode representing the 694 * remote root. If this object is not persistent, then backward 695 * traversals of the mount point (i.e. "..") will not work if 696 * the nfsnode gets flushed out of the cache. Ufs does not have 697 * this problem, because one can identify root inodes by their 698 * number == ROOTINO (2). 699 */ 700 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np); 701 if (error) 702 goto bad; 703 *vpp = NFSTOV(np); 704 VOP_GETATTR(*vpp, &attrs, p->p_ucred, p); 705 if ((nmp->nm_flag & NFSMNT_NFSV3) && ((*vpp)->v_type == VDIR)) { 706 cr = crget(); 707 cr->cr_uid = attrs.va_uid; 708 cr->cr_gid = attrs.va_gid; 709 cr->cr_ngroups = 0; 710 nfs_cookieheuristic(*vpp, &nmp->nm_iflag, p, cr); 711 crfree(cr); 712 } 713 714 return (0); 715 bad: 716 nfs_disconnect(nmp); 717 free((caddr_t)nmp, M_NFSMNT); 718 m_freem(nam); 719 return (error); 720 } 721 722 /* 723 * unmount system call 724 */ 725 int 726 nfs_unmount(mp, mntflags, p) 727 struct mount *mp; 728 int mntflags; 729 struct proc *p; 730 { 731 register struct nfsmount *nmp; 732 struct nfsnode *np; 733 struct vnode *vp; 734 int error, flags = 0; 735 736 if (mntflags & MNT_FORCE) 737 flags |= FORCECLOSE; 738 nmp = VFSTONFS(mp); 739 /* 740 * Goes something like this.. 741 * - Check for activity on the root vnode (other than ourselves). 742 * - Call vflush() to clear out vnodes for this file system, 743 * except for the root vnode. 744 * - Decrement reference on the vnode representing remote root. 745 * - Close the socket 746 * - Free up the data structures 747 */ 748 /* 749 * We need to decrement the ref. count on the nfsnode representing 750 * the remote root. See comment in mountnfs(). The VFS unmount() 751 * has done vput on this vnode, otherwise we would get deadlock! 752 */ 753 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np); 754 if (error) 755 return(error); 756 vp = NFSTOV(np); 757 if ((mntflags & MNT_FORCE) == 0 && vp->v_usecount > 2) { 758 vput(vp); 759 return (EBUSY); 760 } 761 762 /* 763 * Must handshake with nqnfs_clientd() if it is active. 764 */ 765 nmp->nm_iflag |= NFSMNT_DISMINPROG; 766 while (nmp->nm_inprog != NULLVP) 767 (void) tsleep((caddr_t)&lbolt, PSOCK, "nfsdism", 0); 768 error = vflush(mp, vp, flags); 769 if (error) { 770 vput(vp); 771 nmp->nm_iflag &= ~NFSMNT_DISMINPROG; 772 return (error); 773 } 774 775 /* 776 * We are now committed to the unmount; mark the mount structure 777 * as doomed so that any sleepers kicked awake by nfs_disconnect 778 * will go away cleanly. 779 */ 780 nmp->nm_iflag |= NFSMNT_DISMNT; 781 782 /* 783 * There are two reference counts to get rid of here. 784 */ 785 vrele(vp); 786 vrele(vp); 787 vgone(vp); 788 nfs_disconnect(nmp); 789 m_freem(nmp->nm_nam); 790 791 /* 792 * For NQNFS, let the server daemon free the nfsmount structure. 793 */ 794 if ((nmp->nm_flag & (NFSMNT_NQNFS | NFSMNT_KERB)) == 0) 795 free((caddr_t)nmp, M_NFSMNT); 796 return (0); 797 } 798 799 /* 800 * Return root of a filesystem 801 */ 802 int 803 nfs_root(mp, vpp) 804 struct mount *mp; 805 struct vnode **vpp; 806 { 807 register struct vnode *vp; 808 struct nfsmount *nmp; 809 struct nfsnode *np; 810 int error; 811 812 nmp = VFSTONFS(mp); 813 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np); 814 if (error) 815 return (error); 816 vp = NFSTOV(np); 817 if (vp->v_type == VNON) 818 vp->v_type = VDIR; 819 vp->v_flag = VROOT; 820 *vpp = vp; 821 return (0); 822 } 823 824 extern int syncprt; 825 826 /* 827 * Flush out the buffer cache 828 */ 829 /* ARGSUSED */ 830 int 831 nfs_sync(mp, waitfor, cred, p) 832 struct mount *mp; 833 int waitfor; 834 struct ucred *cred; 835 struct proc *p; 836 { 837 register struct vnode *vp; 838 int error, allerror = 0; 839 840 /* 841 * Force stale buffer cache information to be flushed. 842 */ 843 loop: 844 for (vp = mp->mnt_vnodelist.lh_first; 845 vp != NULL; 846 vp = vp->v_mntvnodes.le_next) { 847 /* 848 * If the vnode that we are about to sync is no longer 849 * associated with this mount point, start over. 850 */ 851 if (vp->v_mount != mp) 852 goto loop; 853 if (VOP_ISLOCKED(vp) || vp->v_dirtyblkhd.lh_first == NULL || 854 waitfor == MNT_LAZY) 855 continue; 856 if (vget(vp, LK_EXCLUSIVE)) 857 goto loop; 858 error = VOP_FSYNC(vp, cred, 859 waitfor == MNT_WAIT ? FSYNC_WAIT : 0, p); 860 if (error) 861 allerror = error; 862 vput(vp); 863 } 864 return (allerror); 865 } 866 867 /* 868 * NFS flat namespace lookup. 869 * Currently unsupported. 870 */ 871 /* ARGSUSED */ 872 int 873 nfs_vget(mp, ino, vpp) 874 struct mount *mp; 875 ino_t ino; 876 struct vnode **vpp; 877 { 878 879 return (EOPNOTSUPP); 880 } 881 882 /* 883 * Do that sysctl thang... 884 */ 885 int 886 nfs_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 887 int *name; 888 u_int namelen; 889 void *oldp; 890 size_t *oldlenp; 891 void *newp; 892 size_t newlen; 893 struct proc *p; 894 { 895 int rv; 896 897 /* 898 * All names at this level are terminal. 899 */ 900 if(namelen > 1) 901 return ENOTDIR; /* overloaded */ 902 903 switch(name[0]) { 904 case NFS_NFSSTATS: 905 if(!oldp) { 906 *oldlenp = sizeof nfsstats; 907 return 0; 908 } 909 910 if(*oldlenp < sizeof nfsstats) { 911 *oldlenp = sizeof nfsstats; 912 return ENOMEM; 913 } 914 915 rv = copyout(&nfsstats, oldp, sizeof nfsstats); 916 if(rv) return rv; 917 918 if(newp && newlen != sizeof nfsstats) 919 return EINVAL; 920 921 if(newp) { 922 return copyin(newp, &nfsstats, sizeof nfsstats); 923 } 924 return 0; 925 926 default: 927 return EOPNOTSUPP; 928 } 929 } 930 931 932 /* 933 * At this point, this should never happen 934 */ 935 /* ARGSUSED */ 936 int 937 nfs_fhtovp(mp, fhp, vpp) 938 register struct mount *mp; 939 struct fid *fhp; 940 struct vnode **vpp; 941 { 942 943 return (EINVAL); 944 } 945 946 /* ARGSUSED */ 947 int 948 nfs_checkexp(mp, nam, exflagsp, credanonp) 949 register struct mount *mp; 950 struct mbuf *nam; 951 int *exflagsp; 952 struct ucred **credanonp; 953 { 954 955 return (EINVAL); 956 } 957 958 /* 959 * Vnode pointer to File handle, should never happen either 960 */ 961 /* ARGSUSED */ 962 int 963 nfs_vptofh(vp, fhp) 964 struct vnode *vp; 965 struct fid *fhp; 966 { 967 968 return (EINVAL); 969 } 970 971 /* 972 * Vfs start routine, a no-op. 973 */ 974 /* ARGSUSED */ 975 int 976 nfs_start(mp, flags, p) 977 struct mount *mp; 978 int flags; 979 struct proc *p; 980 { 981 982 return (0); 983 } 984 985 /* 986 * Do operations associated with quotas, not supported 987 */ 988 /* ARGSUSED */ 989 int 990 nfs_quotactl(mp, cmd, uid, arg, p) 991 struct mount *mp; 992 int cmd; 993 uid_t uid; 994 caddr_t arg; 995 struct proc *p; 996 { 997 998 return (EOPNOTSUPP); 999 } 1000
Indexes created Wed Sep 24 05:09:52 GMT 2025