nfs_vfsops.c revision 1.80
1 /* $NetBSD: nfs_vfsops.c,v 1.80 1999/02/21 15:11:09 drochner 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_sysctl, 111 nfs_mountroot, 112 nfs_vnodeopv_descs, 113 }; 114 115 extern u_int32_t nfs_procids[NFS_NPROCS]; 116 extern u_int32_t nfs_prog, nfs_vers; 117 118 static int nfs_mount_diskless __P((struct nfs_dlmount *, const char *, 119 struct mount **, struct vnode **, struct proc *)); 120 121 #define TRUE 1 122 #define FALSE 0 123 124 /* 125 * nfs statfs call 126 */ 127 int 128 nfs_statfs(mp, sbp, p) 129 struct mount *mp; 130 register struct statfs *sbp; 131 struct proc *p; 132 { 133 register struct vnode *vp; 134 register struct nfs_statfs *sfp; 135 register caddr_t cp; 136 register u_int32_t *tl; 137 register int32_t t1, t2; 138 caddr_t bpos, dpos, cp2; 139 struct nfsmount *nmp = VFSTONFS(mp); 140 int error = 0, v3 = (nmp->nm_flag & NFSMNT_NFSV3), retattr; 141 struct mbuf *mreq, *mrep = NULL, *md, *mb, *mb2; 142 struct ucred *cred; 143 struct nfsnode *np; 144 u_quad_t tquad; 145 146 #ifndef nolint 147 sfp = (struct nfs_statfs *)0; 148 #endif 149 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np); 150 if (error) 151 return (error); 152 vp = NFSTOV(np); 153 cred = crget(); 154 cred->cr_ngroups = 0; 155 if (v3 && (nmp->nm_iflag & NFSMNT_GOTFSINFO) == 0) 156 (void)nfs_fsinfo(nmp, vp, cred, p); 157 nfsstats.rpccnt[NFSPROC_FSSTAT]++; 158 nfsm_reqhead(vp, NFSPROC_FSSTAT, NFSX_FH(v3)); 159 nfsm_fhtom(vp, v3); 160 nfsm_request(vp, NFSPROC_FSSTAT, p, cred); 161 if (v3) 162 nfsm_postop_attr(vp, retattr); 163 if (error) { 164 if (mrep != NULL) 165 m_free(mrep); 166 goto nfsmout; 167 } 168 nfsm_dissect(sfp, struct nfs_statfs *, NFSX_STATFS(v3)); 169 #ifdef COMPAT_09 170 sbp->f_type = 2; 171 #else 172 sbp->f_type = 0; 173 #endif 174 sbp->f_flags = nmp->nm_flag; 175 sbp->f_iosize = min(nmp->nm_rsize, nmp->nm_wsize); 176 if (v3) { 177 sbp->f_bsize = NFS_FABLKSIZE; 178 fxdr_hyper(&sfp->sf_tbytes, &tquad); 179 sbp->f_blocks = (long)(tquad / ((u_quad_t)NFS_FABLKSIZE)); 180 fxdr_hyper(&sfp->sf_fbytes, &tquad); 181 sbp->f_bfree = (long)(tquad / ((u_quad_t)NFS_FABLKSIZE)); 182 fxdr_hyper(&sfp->sf_abytes, &tquad); 183 sbp->f_bavail = (long)(tquad / ((u_quad_t)NFS_FABLKSIZE)); 184 sbp->f_files = (fxdr_unsigned(int32_t, 185 sfp->sf_tfiles.nfsuquad[1]) & 0x7fffffff); 186 sbp->f_ffree = (fxdr_unsigned(int32_t, 187 sfp->sf_ffiles.nfsuquad[1]) & 0x7fffffff); 188 } else { 189 sbp->f_bsize = fxdr_unsigned(int32_t, sfp->sf_bsize); 190 sbp->f_blocks = fxdr_unsigned(int32_t, sfp->sf_blocks); 191 sbp->f_bfree = fxdr_unsigned(int32_t, sfp->sf_bfree); 192 sbp->f_bavail = fxdr_unsigned(int32_t, sfp->sf_bavail); 193 sbp->f_files = 0; 194 sbp->f_ffree = 0; 195 } 196 if (sbp != &mp->mnt_stat) { 197 memcpy(sbp->f_mntonname, mp->mnt_stat.f_mntonname, MNAMELEN); 198 memcpy(sbp->f_mntfromname, mp->mnt_stat.f_mntfromname, MNAMELEN); 199 } 200 strncpy(&sbp->f_fstypename[0], mp->mnt_op->vfs_name, MFSNAMELEN); 201 nfsm_reqdone; 202 vrele(vp); 203 crfree(cred); 204 return (error); 205 } 206 207 /* 208 * nfs version 3 fsinfo rpc call 209 */ 210 int 211 nfs_fsinfo(nmp, vp, cred, p) 212 register struct nfsmount *nmp; 213 register struct vnode *vp; 214 struct ucred *cred; 215 struct proc *p; 216 { 217 register struct nfsv3_fsinfo *fsp; 218 register caddr_t cp; 219 register int32_t t1, t2; 220 register u_int32_t *tl, pref, max; 221 caddr_t bpos, dpos, cp2; 222 int error = 0, retattr; 223 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 224 u_int64_t maxfsize; 225 226 nfsstats.rpccnt[NFSPROC_FSINFO]++; 227 nfsm_reqhead(vp, NFSPROC_FSINFO, NFSX_FH(1)); 228 nfsm_fhtom(vp, 1); 229 nfsm_request(vp, NFSPROC_FSINFO, p, cred); 230 nfsm_postop_attr(vp, retattr); 231 if (!error) { 232 nfsm_dissect(fsp, struct nfsv3_fsinfo *, NFSX_V3FSINFO); 233 pref = fxdr_unsigned(u_int32_t, fsp->fs_wtpref); 234 if (pref < nmp->nm_wsize && pref >= NFS_FABLKSIZE) 235 nmp->nm_wsize = (pref + NFS_FABLKSIZE - 1) & 236 ~(NFS_FABLKSIZE - 1); 237 max = fxdr_unsigned(u_int32_t, fsp->fs_wtmax); 238 if (max < nmp->nm_wsize && max > 0) { 239 nmp->nm_wsize = max & ~(NFS_FABLKSIZE - 1); 240 if (nmp->nm_wsize == 0) 241 nmp->nm_wsize = max; 242 } 243 pref = fxdr_unsigned(u_int32_t, fsp->fs_rtpref); 244 if (pref < nmp->nm_rsize && pref >= NFS_FABLKSIZE) 245 nmp->nm_rsize = (pref + NFS_FABLKSIZE - 1) & 246 ~(NFS_FABLKSIZE - 1); 247 max = fxdr_unsigned(u_int32_t, fsp->fs_rtmax); 248 if (max < nmp->nm_rsize && max > 0) { 249 nmp->nm_rsize = max & ~(NFS_FABLKSIZE - 1); 250 if (nmp->nm_rsize == 0) 251 nmp->nm_rsize = max; 252 } 253 pref = fxdr_unsigned(u_int32_t, fsp->fs_dtpref); 254 if (pref < nmp->nm_readdirsize && pref >= NFS_DIRFRAGSIZ) 255 nmp->nm_readdirsize = (pref + NFS_DIRFRAGSIZ - 1) & 256 ~(NFS_DIRFRAGSIZ - 1); 257 if (max < nmp->nm_readdirsize && max > 0) { 258 nmp->nm_readdirsize = max & ~(NFS_DIRFRAGSIZ - 1); 259 if (nmp->nm_readdirsize == 0) 260 nmp->nm_readdirsize = max; 261 } 262 /* XXX */ 263 nmp->nm_maxfilesize = (u_int64_t)0x80000000 * DEV_BSIZE - 1; 264 fxdr_hyper(&fsp->fs_maxfilesize, &maxfsize); 265 if (maxfsize > 0 && maxfsize < nmp->nm_maxfilesize) 266 nmp->nm_maxfilesize = maxfsize; 267 nmp->nm_iflag |= NFSMNT_GOTFSINFO; 268 } 269 nfsm_reqdone; 270 return (error); 271 } 272 273 /* 274 * Mount a remote root fs via. NFS. It goes like this: 275 * - Call nfs_boot_init() to fill in the nfs_diskless struct 276 * - build the rootfs mount point and call mountnfs() to do the rest. 277 */ 278 int 279 nfs_mountroot() 280 { 281 struct nfs_diskless *nd; 282 struct vattr attr; 283 struct mount *mp; 284 struct vnode *vp; 285 struct proc *procp; 286 long n; 287 int error; 288 289 procp = curproc; /* XXX */ 290 291 if (root_device->dv_class != DV_IFNET) 292 return (ENODEV); 293 294 /* 295 * XXX time must be non-zero when we init the interface or else 296 * the arp code will wedge. [Fixed now in if_ether.c] 297 * However, the NFS attribute cache gives false "hits" when 298 * time.tv_sec < NFS_ATTRTIMEO(np) so keep this in for now. 299 */ 300 if (time.tv_sec < NFS_MAXATTRTIMO) 301 time.tv_sec = NFS_MAXATTRTIMO; 302 303 /* 304 * Call nfs_boot_init() to fill in the nfs_diskless struct. 305 * Side effect: Finds and configures a network interface. 306 */ 307 nd = malloc(sizeof(*nd), M_NFSMNT, M_WAITOK); 308 memset((caddr_t)nd, 0, sizeof(*nd)); 309 error = nfs_boot_init(nd, procp); 310 if (error) { 311 free(nd, M_NFSMNT); 312 return (error); 313 } 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_atime.tv_sec; 338 #ifdef DEBUG 339 printf("root time: 0x%lx\n", n); 340 #endif 341 inittodr(n); 342 343 out: 344 if (error) 345 nfs_boot_cleanup(nd, procp); 346 free(nd, M_NFSMNT); 347 return (error); 348 } 349 350 /* 351 * Internal version of mount system call for diskless setup. 352 * Separate function because we used to call it twice. 353 * (once for root and once for swap) 354 */ 355 static int 356 nfs_mount_diskless(ndmntp, mntname, mpp, vpp, p) 357 struct nfs_dlmount *ndmntp; 358 const char *mntname; /* mount point name */ 359 struct mount **mpp; 360 struct vnode **vpp; 361 struct proc *p; 362 { 363 struct mount *mp; 364 struct mbuf *m; 365 int error; 366 367 vfs_rootmountalloc(MOUNT_NFS, (char *)mntname, &mp); 368 369 mp->mnt_op = &nfs_vfsops; 370 371 /* 372 * Historical practice expects NFS root file systems to 373 * be initially mounted r/w. 374 */ 375 mp->mnt_flag &= ~MNT_RDONLY; 376 377 /* Get mbuf for server sockaddr. */ 378 m = m_get(M_WAIT, MT_SONAME); 379 if (m == NULL) 380 panic("nfs_mountroot: mget soname for %s", mntname); 381 memcpy(mtod(m, caddr_t), (caddr_t)ndmntp->ndm_args.addr, 382 (m->m_len = ndmntp->ndm_args.addr->sa_len)); 383 384 error = mountnfs(&ndmntp->ndm_args, mp, m, mntname, 385 ndmntp->ndm_args.hostname, vpp, p); 386 if (error) { 387 mp->mnt_op->vfs_refcount--; 388 vfs_unbusy(mp); 389 printf("nfs_mountroot: mount %s failed: %d\n", 390 mntname, error); 391 free(mp, M_MOUNT); 392 } else 393 *mpp = mp; 394 395 return (error); 396 } 397 398 void 399 nfs_decode_args(nmp, argp) 400 struct nfsmount *nmp; 401 struct nfs_args *argp; 402 { 403 int s; 404 int adjsock; 405 int maxio; 406 407 s = splsoftnet(); 408 409 /* 410 * Silently clear NFSMNT_NOCONN if it's a TCP mount, it makes 411 * no sense in that context. 412 */ 413 if (argp->sotype == SOCK_STREAM) 414 argp->flags &= ~NFSMNT_NOCONN; 415 416 /* 417 * Cookie translation is not needed for v2, silently ignore it. 418 */ 419 if ((argp->flags & (NFSMNT_XLATECOOKIE|NFSMNT_NFSV3)) == 420 NFSMNT_XLATECOOKIE) 421 argp->flags &= ~NFSMNT_XLATECOOKIE; 422 423 /* Re-bind if rsrvd port requested and wasn't on one */ 424 adjsock = !(nmp->nm_flag & NFSMNT_RESVPORT) 425 && (argp->flags & NFSMNT_RESVPORT); 426 /* Also re-bind if we're switching to/from a connected UDP socket */ 427 adjsock |= ((nmp->nm_flag & NFSMNT_NOCONN) != 428 (argp->flags & NFSMNT_NOCONN)); 429 430 /* Update flags atomically. Don't change the lock bits. */ 431 nmp->nm_flag = argp->flags | nmp->nm_flag; 432 splx(s); 433 434 if ((argp->flags & NFSMNT_TIMEO) && argp->timeo > 0) { 435 nmp->nm_timeo = (argp->timeo * NFS_HZ + 5) / 10; 436 if (nmp->nm_timeo < NFS_MINTIMEO) 437 nmp->nm_timeo = NFS_MINTIMEO; 438 else if (nmp->nm_timeo > NFS_MAXTIMEO) 439 nmp->nm_timeo = NFS_MAXTIMEO; 440 } 441 442 if ((argp->flags & NFSMNT_RETRANS) && argp->retrans > 1) { 443 nmp->nm_retry = argp->retrans; 444 if (nmp->nm_retry > NFS_MAXREXMIT) 445 nmp->nm_retry = NFS_MAXREXMIT; 446 } 447 448 if (argp->flags & NFSMNT_NFSV3) { 449 if (argp->sotype == SOCK_DGRAM) 450 maxio = NFS_MAXDGRAMDATA; 451 else 452 maxio = NFS_MAXDATA; 453 } else 454 maxio = NFS_V2MAXDATA; 455 456 if ((argp->flags & NFSMNT_WSIZE) && argp->wsize > 0) { 457 int osize = nmp->nm_wsize; 458 nmp->nm_wsize = argp->wsize; 459 /* Round down to multiple of blocksize */ 460 nmp->nm_wsize &= ~(NFS_FABLKSIZE - 1); 461 if (nmp->nm_wsize <= 0) 462 nmp->nm_wsize = NFS_FABLKSIZE; 463 adjsock |= (nmp->nm_wsize != osize); 464 } 465 if (nmp->nm_wsize > maxio) 466 nmp->nm_wsize = maxio; 467 if (nmp->nm_wsize > MAXBSIZE) 468 nmp->nm_wsize = MAXBSIZE; 469 470 if ((argp->flags & NFSMNT_RSIZE) && argp->rsize > 0) { 471 int osize = nmp->nm_rsize; 472 nmp->nm_rsize = argp->rsize; 473 /* Round down to multiple of blocksize */ 474 nmp->nm_rsize &= ~(NFS_FABLKSIZE - 1); 475 if (nmp->nm_rsize <= 0) 476 nmp->nm_rsize = NFS_FABLKSIZE; 477 adjsock |= (nmp->nm_rsize != osize); 478 } 479 if (nmp->nm_rsize > maxio) 480 nmp->nm_rsize = maxio; 481 if (nmp->nm_rsize > MAXBSIZE) 482 nmp->nm_rsize = MAXBSIZE; 483 484 if ((argp->flags & NFSMNT_READDIRSIZE) && argp->readdirsize > 0) { 485 nmp->nm_readdirsize = argp->readdirsize; 486 /* Round down to multiple of minimum blocksize */ 487 nmp->nm_readdirsize &= ~(NFS_DIRFRAGSIZ - 1); 488 if (nmp->nm_readdirsize < NFS_DIRFRAGSIZ) 489 nmp->nm_readdirsize = NFS_DIRFRAGSIZ; 490 /* Bigger than buffer size makes no sense */ 491 if (nmp->nm_readdirsize > NFS_DIRBLKSIZ) 492 nmp->nm_readdirsize = NFS_DIRBLKSIZ; 493 } else if (argp->flags & NFSMNT_RSIZE) 494 nmp->nm_readdirsize = nmp->nm_rsize; 495 496 if (nmp->nm_readdirsize > maxio) 497 nmp->nm_readdirsize = maxio; 498 499 if ((argp->flags & NFSMNT_MAXGRPS) && argp->maxgrouplist >= 0 && 500 argp->maxgrouplist <= NFS_MAXGRPS) 501 nmp->nm_numgrps = argp->maxgrouplist; 502 if ((argp->flags & NFSMNT_READAHEAD) && argp->readahead >= 0 && 503 argp->readahead <= NFS_MAXRAHEAD) 504 nmp->nm_readahead = argp->readahead; 505 if ((argp->flags & NFSMNT_LEASETERM) && argp->leaseterm >= 2 && 506 argp->leaseterm <= NQ_MAXLEASE) 507 nmp->nm_leaseterm = argp->leaseterm; 508 if ((argp->flags & NFSMNT_DEADTHRESH) && argp->deadthresh >= 1 && 509 argp->deadthresh <= NQ_NEVERDEAD) 510 nmp->nm_deadthresh = argp->deadthresh; 511 512 adjsock |= ((nmp->nm_sotype != argp->sotype) || 513 (nmp->nm_soproto != argp->proto)); 514 nmp->nm_sotype = argp->sotype; 515 nmp->nm_soproto = argp->proto; 516 517 if (nmp->nm_so && adjsock) { 518 nfs_safedisconnect(nmp); 519 if (nmp->nm_sotype == SOCK_DGRAM) 520 while (nfs_connect(nmp, (struct nfsreq *)0)) { 521 printf("nfs_args: retrying connect\n"); 522 (void) tsleep((caddr_t)&lbolt, 523 PSOCK, "nfscn3", 0); 524 } 525 } 526 } 527 528 /* 529 * VFS Operations. 530 * 531 * mount system call 532 * It seems a bit dumb to copyinstr() the host and path here and then 533 * memcpy() them in mountnfs(), but I wanted to detect errors before 534 * doing the sockargs() call because sockargs() allocates an mbuf and 535 * an error after that means that I have to release the mbuf. 536 */ 537 /* ARGSUSED */ 538 int 539 nfs_mount(mp, path, data, ndp, p) 540 struct mount *mp; 541 const char *path; 542 void *data; 543 struct nameidata *ndp; 544 struct proc *p; 545 { 546 int error; 547 struct nfs_args args; 548 struct mbuf *nam; 549 struct vnode *vp; 550 char pth[MNAMELEN], hst[MNAMELEN]; 551 size_t len; 552 u_char nfh[NFSX_V3FHMAX]; 553 554 error = copyin(data, (caddr_t)&args, sizeof (struct nfs_args)); 555 if (error) 556 return (error); 557 if (args.version != NFS_ARGSVERSION) 558 return (EPROGMISMATCH); 559 if (mp->mnt_flag & MNT_UPDATE) { 560 register struct nfsmount *nmp = VFSTONFS(mp); 561 562 if (nmp == NULL) 563 return (EIO); 564 /* 565 * When doing an update, we can't change from or to 566 * v3 and/or nqnfs, or change cookie translation 567 */ 568 args.flags = (args.flags & 569 ~(NFSMNT_NFSV3|NFSMNT_NQNFS|NFSMNT_XLATECOOKIE)) | 570 (nmp->nm_flag & 571 (NFSMNT_NFSV3|NFSMNT_NQNFS|NFSMNT_XLATECOOKIE)); 572 nfs_decode_args(nmp, &args); 573 return (0); 574 } 575 error = copyin((caddr_t)args.fh, (caddr_t)nfh, args.fhsize); 576 if (error) 577 return (error); 578 error = copyinstr(path, pth, MNAMELEN-1, &len); 579 if (error) 580 return (error); 581 memset(&pth[len], 0, MNAMELEN - len); 582 error = copyinstr(args.hostname, hst, MNAMELEN-1, &len); 583 if (error) 584 return (error); 585 memset(&hst[len], 0, MNAMELEN - len); 586 /* sockargs() call must be after above copyin() calls */ 587 error = sockargs(&nam, (caddr_t)args.addr, args.addrlen, MT_SONAME); 588 if (error) 589 return (error); 590 args.fh = nfh; 591 error = mountnfs(&args, mp, nam, pth, hst, &vp, p); 592 return (error); 593 } 594 595 /* 596 * Common code for mount and mountroot 597 */ 598 int 599 mountnfs(argp, mp, nam, pth, hst, vpp, p) 600 register struct nfs_args *argp; 601 register struct mount *mp; 602 struct mbuf *nam; 603 const char *pth, *hst; 604 struct vnode **vpp; 605 struct proc *p; 606 { 607 register struct nfsmount *nmp; 608 struct nfsnode *np; 609 int error; 610 struct vattr attrs; 611 struct ucred *cr; 612 613 if (mp->mnt_flag & MNT_UPDATE) { 614 nmp = VFSTONFS(mp); 615 /* update paths, file handles, etc, here XXX */ 616 m_freem(nam); 617 return (0); 618 } else { 619 MALLOC(nmp, struct nfsmount *, sizeof (struct nfsmount), 620 M_NFSMNT, M_WAITOK); 621 memset((caddr_t)nmp, 0, sizeof (struct nfsmount)); 622 mp->mnt_data = (qaddr_t)nmp; 623 TAILQ_INIT(&nmp->nm_uidlruhead); 624 TAILQ_INIT(&nmp->nm_bufq); 625 } 626 vfs_getnewfsid(mp, MOUNT_NFS); 627 nmp->nm_mountp = mp; 628 629 if (argp->flags & NFSMNT_NQNFS) 630 /* 631 * We have to set mnt_maxsymlink to a non-zero value so 632 * that COMPAT_43 routines will know that we are setting 633 * the d_type field in directories (and can zero it for 634 * unsuspecting binaries). 635 */ 636 mp->mnt_maxsymlinklen = 1; 637 638 if ((argp->flags & NFSMNT_NFSV3) == 0) 639 /* 640 * V2 can only handle 32 bit filesizes. For v3, nfs_fsinfo 641 * will fill this in. 642 */ 643 nmp->nm_maxfilesize = 0xffffffffLL; 644 645 nmp->nm_timeo = NFS_TIMEO; 646 nmp->nm_retry = NFS_RETRANS; 647 nmp->nm_wsize = NFS_WSIZE; 648 nmp->nm_rsize = NFS_RSIZE; 649 nmp->nm_readdirsize = NFS_READDIRSIZE; 650 nmp->nm_numgrps = NFS_MAXGRPS; 651 nmp->nm_readahead = NFS_DEFRAHEAD; 652 nmp->nm_leaseterm = NQ_DEFLEASE; 653 nmp->nm_deadthresh = NQ_DEADTHRESH; 654 CIRCLEQ_INIT(&nmp->nm_timerhead); 655 nmp->nm_inprog = NULLVP; 656 nmp->nm_fhsize = argp->fhsize; 657 memcpy((caddr_t)nmp->nm_fh, (caddr_t)argp->fh, argp->fhsize); 658 #ifdef COMPAT_09 659 mp->mnt_stat.f_type = 2; 660 #else 661 mp->mnt_stat.f_type = 0; 662 #endif 663 strncpy(&mp->mnt_stat.f_fstypename[0], mp->mnt_op->vfs_name, 664 MFSNAMELEN); 665 memcpy(mp->mnt_stat.f_mntfromname, hst, MNAMELEN); 666 memcpy(mp->mnt_stat.f_mntonname, pth, MNAMELEN); 667 nmp->nm_nam = nam; 668 669 /* Set up the sockets and per-host congestion */ 670 nmp->nm_sotype = argp->sotype; 671 nmp->nm_soproto = argp->proto; 672 673 nfs_decode_args(nmp, argp); 674 675 /* 676 * For Connection based sockets (TCP,...) defer the connect until 677 * the first request, in case the server is not responding. 678 */ 679 if (nmp->nm_sotype == SOCK_DGRAM && 680 (error = nfs_connect(nmp, (struct nfsreq *)0))) 681 goto bad; 682 683 /* 684 * This is silly, but it has to be set so that vinifod() works. 685 * We do not want to do an nfs_statfs() here since we can get 686 * stuck on a dead server and we are holding a lock on the mount 687 * point. 688 */ 689 mp->mnt_stat.f_iosize = NFS_MAXDGRAMDATA; 690 /* 691 * A reference count is needed on the nfsnode representing the 692 * remote root. If this object is not persistent, then backward 693 * traversals of the mount point (i.e. "..") will not work if 694 * the nfsnode gets flushed out of the cache. Ufs does not have 695 * this problem, because one can identify root inodes by their 696 * number == ROOTINO (2). 697 */ 698 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np); 699 if (error) 700 goto bad; 701 *vpp = NFSTOV(np); 702 VOP_GETATTR(*vpp, &attrs, p->p_ucred, p); 703 if ((nmp->nm_flag & NFSMNT_NFSV3) && ((*vpp)->v_type == VDIR)) { 704 cr = crget(); 705 cr->cr_uid = attrs.va_uid; 706 cr->cr_gid = attrs.va_gid; 707 cr->cr_ngroups = 0; 708 nfs_cookieheuristic(*vpp, &nmp->nm_iflag, p, cr); 709 crfree(cr); 710 } 711 712 return (0); 713 bad: 714 nfs_disconnect(nmp); 715 free((caddr_t)nmp, M_NFSMNT); 716 m_freem(nam); 717 return (error); 718 } 719 720 /* 721 * unmount system call 722 */ 723 int 724 nfs_unmount(mp, mntflags, p) 725 struct mount *mp; 726 int mntflags; 727 struct proc *p; 728 { 729 register struct nfsmount *nmp; 730 struct nfsnode *np; 731 struct vnode *vp; 732 int error, flags = 0; 733 734 if (mntflags & MNT_FORCE) 735 flags |= FORCECLOSE; 736 nmp = VFSTONFS(mp); 737 /* 738 * Goes something like this.. 739 * - Check for activity on the root vnode (other than ourselves). 740 * - Call vflush() to clear out vnodes for this file system, 741 * except for the root vnode. 742 * - Decrement reference on the vnode representing remote root. 743 * - Close the socket 744 * - Free up the data structures 745 */ 746 /* 747 * We need to decrement the ref. count on the nfsnode representing 748 * the remote root. See comment in mountnfs(). The VFS unmount() 749 * has done vput on this vnode, otherwise we would get deadlock! 750 */ 751 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np); 752 if (error) 753 return(error); 754 vp = NFSTOV(np); 755 if ((mntflags & MNT_FORCE) == 0 && vp->v_usecount > 2) { 756 vput(vp); 757 return (EBUSY); 758 } 759 760 /* 761 * Must handshake with nqnfs_clientd() if it is active. 762 */ 763 nmp->nm_iflag |= NFSMNT_DISMINPROG; 764 while (nmp->nm_inprog != NULLVP) 765 (void) tsleep((caddr_t)&lbolt, PSOCK, "nfsdism", 0); 766 error = vflush(mp, vp, flags); 767 if (error) { 768 vput(vp); 769 nmp->nm_iflag &= ~NFSMNT_DISMINPROG; 770 return (error); 771 } 772 773 /* 774 * We are now committed to the unmount. 775 * For NQNFS, let the server daemon free the nfsmount structure. 776 */ 777 if (nmp->nm_flag & (NFSMNT_NQNFS | NFSMNT_KERB)) 778 nmp->nm_iflag |= NFSMNT_DISMNT; 779 780 /* 781 * There are two reference counts to get rid of here. 782 */ 783 vrele(vp); 784 vrele(vp); 785 vgone(vp); 786 nfs_disconnect(nmp); 787 m_freem(nmp->nm_nam); 788 789 if ((nmp->nm_flag & (NFSMNT_NQNFS | NFSMNT_KERB)) == 0) 790 free((caddr_t)nmp, M_NFSMNT); 791 return (0); 792 } 793 794 /* 795 * Return root of a filesystem 796 */ 797 int 798 nfs_root(mp, vpp) 799 struct mount *mp; 800 struct vnode **vpp; 801 { 802 register struct vnode *vp; 803 struct nfsmount *nmp; 804 struct nfsnode *np; 805 int error; 806 807 nmp = VFSTONFS(mp); 808 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np); 809 if (error) 810 return (error); 811 vp = NFSTOV(np); 812 if (vp->v_type == VNON) 813 vp->v_type = VDIR; 814 vp->v_flag = VROOT; 815 *vpp = vp; 816 return (0); 817 } 818 819 extern int syncprt; 820 821 /* 822 * Flush out the buffer cache 823 */ 824 /* ARGSUSED */ 825 int 826 nfs_sync(mp, waitfor, cred, p) 827 struct mount *mp; 828 int waitfor; 829 struct ucred *cred; 830 struct proc *p; 831 { 832 register struct vnode *vp; 833 int error, allerror = 0; 834 835 /* 836 * Force stale buffer cache information to be flushed. 837 */ 838 loop: 839 for (vp = mp->mnt_vnodelist.lh_first; 840 vp != NULL; 841 vp = vp->v_mntvnodes.le_next) { 842 /* 843 * If the vnode that we are about to sync is no longer 844 * associated with this mount point, start over. 845 */ 846 if (vp->v_mount != mp) 847 goto loop; 848 if (VOP_ISLOCKED(vp) || vp->v_dirtyblkhd.lh_first == NULL) 849 continue; 850 if (vget(vp, LK_EXCLUSIVE)) 851 goto loop; 852 error = VOP_FSYNC(vp, cred, 853 waitfor == MNT_WAIT ? FSYNC_WAIT : 0, p); 854 if (error) 855 allerror = error; 856 vput(vp); 857 } 858 return (allerror); 859 } 860 861 /* 862 * NFS flat namespace lookup. 863 * Currently unsupported. 864 */ 865 /* ARGSUSED */ 866 int 867 nfs_vget(mp, ino, vpp) 868 struct mount *mp; 869 ino_t ino; 870 struct vnode **vpp; 871 { 872 873 return (EOPNOTSUPP); 874 } 875 876 /* 877 * Do that sysctl thang... 878 */ 879 int 880 nfs_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 881 int *name; 882 u_int namelen; 883 void *oldp; 884 size_t *oldlenp; 885 void *newp; 886 size_t newlen; 887 struct proc *p; 888 { 889 int rv; 890 891 /* 892 * All names at this level are terminal. 893 */ 894 if(namelen > 1) 895 return ENOTDIR; /* overloaded */ 896 897 switch(name[0]) { 898 case NFS_NFSSTATS: 899 if(!oldp) { 900 *oldlenp = sizeof nfsstats; 901 return 0; 902 } 903 904 if(*oldlenp < sizeof nfsstats) { 905 *oldlenp = sizeof nfsstats; 906 return ENOMEM; 907 } 908 909 rv = copyout(&nfsstats, oldp, sizeof nfsstats); 910 if(rv) return rv; 911 912 if(newp && newlen != sizeof nfsstats) 913 return EINVAL; 914 915 if(newp) { 916 return copyin(newp, &nfsstats, sizeof nfsstats); 917 } 918 return 0; 919 920 default: 921 return EOPNOTSUPP; 922 } 923 } 924 925 926 /* 927 * At this point, this should never happen 928 */ 929 /* ARGSUSED */ 930 int 931 nfs_fhtovp(mp, fhp, nam, vpp, exflagsp, credanonp) 932 register struct mount *mp; 933 struct fid *fhp; 934 struct mbuf *nam; 935 struct vnode **vpp; 936 int *exflagsp; 937 struct ucred **credanonp; 938 { 939 940 return (EINVAL); 941 } 942 943 /* 944 * Vnode pointer to File handle, should never happen either 945 */ 946 /* ARGSUSED */ 947 int 948 nfs_vptofh(vp, fhp) 949 struct vnode *vp; 950 struct fid *fhp; 951 { 952 953 return (EINVAL); 954 } 955 956 /* 957 * Vfs start routine, a no-op. 958 */ 959 /* ARGSUSED */ 960 int 961 nfs_start(mp, flags, p) 962 struct mount *mp; 963 int flags; 964 struct proc *p; 965 { 966 967 return (0); 968 } 969 970 /* 971 * Do operations associated with quotas, not supported 972 */ 973 /* ARGSUSED */ 974 int 975 nfs_quotactl(mp, cmd, uid, arg, p) 976 struct mount *mp; 977 int cmd; 978 uid_t uid; 979 caddr_t arg; 980 struct proc *p; 981 { 982 983 return (EOPNOTSUPP); 984 } 985
Indexes created Thu Sep 25 16:09:42 GMT 2025