1 /* 2 * Copyright (c) 1989, 1993, 1995 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Rick Macklem at The University of Guelph. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#)nfs_vfsops.c 8.12 (Berkeley) 5/20/95 37 * $FreeBSD: src/sys/nfs/nfs_vfsops.c,v 1.91.2.7 2003/01/27 20:04:08 dillon Exp $ 38 * $DragonFly: src/sys/vfs/nfs/nfs_vfsops.c,v 1.35 2006/02/17 19:18:07 dillon Exp $ 39 */ 40 41 #include "opt_bootp.h" 42 #include "opt_nfsroot.h" 43 44 #include <sys/param.h> 45 #include <sys/sockio.h> 46 #include <sys/proc.h> 47 #include <sys/vnode.h> 48 #include <sys/kernel.h> 49 #include <sys/sysctl.h> 50 #include <sys/malloc.h> 51 #include <sys/mount.h> 52 #include <sys/mbuf.h> 53 #include <sys/socket.h> 54 #include <sys/socketvar.h> 55 #include <sys/systm.h> 56 57 #include <vm/vm.h> 58 #include <vm/vm_extern.h> 59 #include <vm/vm_zone.h> 60 61 #include <net/if.h> 62 #include <net/route.h> 63 #include <netinet/in.h> 64 65 #include <sys/thread2.h> 66 67 #include "rpcv2.h" 68 #include "nfsproto.h" 69 #include "nfs.h" 70 #include "nfsmount.h" 71 #include "nfsnode.h" 72 #include "xdr_subs.h" 73 #include "nfsm_subs.h" 74 #include "nfsdiskless.h" 75 #include "nqnfs.h" 76 #include "nfsmountrpc.h" 77 78 extern int nfs_mountroot(struct mount *mp); 79 extern void bootpc_init(void); 80 81 extern int nfs_ticks; 82 extern struct vnodeopv_entry_desc nfsv2_vnodeop_entries[]; 83 extern struct vnodeopv_entry_desc nfsv2_fifoop_entries[]; 84 extern struct vnodeopv_entry_desc nfsv2_specop_entries[]; 85 86 MALLOC_DEFINE(M_NFSREQ, "NFS req", "NFS request header"); 87 MALLOC_DEFINE(M_NFSBIGFH, "NFSV3 bigfh", "NFS version 3 file handle"); 88 MALLOC_DEFINE(M_NFSD, "NFS daemon", "Nfs server daemon structure"); 89 MALLOC_DEFINE(M_NFSDIROFF, "NFSV3 diroff", "NFS directory offset data"); 90 MALLOC_DEFINE(M_NFSRVDESC, "NFSV3 srvdesc", "NFS server socket descriptor"); 91 MALLOC_DEFINE(M_NFSUID, "NFS uid", "Nfs uid mapping structure"); 92 MALLOC_DEFINE(M_NQLEASE, "NQNFS Lease", "Nqnfs lease"); 93 MALLOC_DEFINE(M_NFSHASH, "NFS hash", "NFS hash tables"); 94 95 vm_zone_t nfsmount_zone; 96 97 struct nfsstats nfsstats; 98 SYSCTL_NODE(_vfs, OID_AUTO, nfs, CTLFLAG_RW, 0, "NFS filesystem"); 99 SYSCTL_STRUCT(_vfs_nfs, NFS_NFSSTATS, nfsstats, CTLFLAG_RD, 100 &nfsstats, nfsstats, ""); 101 static int nfs_ip_paranoia = 1; 102 SYSCTL_INT(_vfs_nfs, OID_AUTO, nfs_ip_paranoia, CTLFLAG_RW, 103 &nfs_ip_paranoia, 0, ""); 104 #ifdef NFS_DEBUG 105 int nfs_debug; 106 SYSCTL_INT(_vfs_nfs, OID_AUTO, debug, CTLFLAG_RW, &nfs_debug, 0, ""); 107 #endif 108 109 /* 110 * Tunable to determine the Read/Write unit size. Maximum value 111 * is NFS_MAXDATA. We also default to NFS_MAXDATA. 112 */ 113 static int nfs_io_size = NFS_MAXDATA; 114 SYSCTL_INT(_vfs_nfs, OID_AUTO, nfs_io_size, CTLFLAG_RW, 115 &nfs_io_size, 0, "NFS optimal I/O unit size"); 116 117 static void nfs_decode_args (struct nfsmount *nmp, 118 struct nfs_args *argp); 119 static int mountnfs (struct nfs_args *,struct mount *, 120 struct sockaddr *,char *,char *,struct vnode **); 121 static int nfs_mount ( struct mount *mp, char *path, caddr_t data, 122 struct thread *td); 123 static int nfs_unmount ( struct mount *mp, int mntflags, 124 struct thread *td); 125 static int nfs_root ( struct mount *mp, struct vnode **vpp); 126 static int nfs_statfs ( struct mount *mp, struct statfs *sbp, 127 struct thread *td); 128 static int nfs_sync ( struct mount *mp, int waitfor, 129 struct thread *td); 130 131 /* 132 * nfs vfs operations. 133 */ 134 static struct vfsops nfs_vfsops = { 135 .vfs_mount = nfs_mount, 136 .vfs_unmount = nfs_unmount, 137 .vfs_root = nfs_root, 138 .vfs_statfs = nfs_statfs, 139 .vfs_sync = nfs_sync, 140 .vfs_init = nfs_init, 141 .vfs_uninit = nfs_uninit 142 }; 143 VFS_SET(nfs_vfsops, nfs, VFCF_NETWORK); 144 145 /* 146 * This structure must be filled in by a primary bootstrap or bootstrap 147 * server for a diskless/dataless machine. It is initialized below just 148 * to ensure that it is allocated to initialized data (.data not .bss). 149 */ 150 struct nfs_diskless nfs_diskless = { { { 0 } } }; 151 struct nfsv3_diskless nfsv3_diskless = { { { 0 } } }; 152 int nfs_diskless_valid = 0; 153 154 SYSCTL_INT(_vfs_nfs, OID_AUTO, diskless_valid, CTLFLAG_RD, 155 &nfs_diskless_valid, 0, ""); 156 157 SYSCTL_STRING(_vfs_nfs, OID_AUTO, diskless_rootpath, CTLFLAG_RD, 158 nfsv3_diskless.root_hostnam, 0, ""); 159 160 SYSCTL_OPAQUE(_vfs_nfs, OID_AUTO, diskless_rootaddr, CTLFLAG_RD, 161 &nfsv3_diskless.root_saddr, sizeof nfsv3_diskless.root_saddr, 162 "%Ssockaddr_in", ""); 163 164 SYSCTL_STRING(_vfs_nfs, OID_AUTO, diskless_swappath, CTLFLAG_RD, 165 nfsv3_diskless.swap_hostnam, 0, ""); 166 167 SYSCTL_OPAQUE(_vfs_nfs, OID_AUTO, diskless_swapaddr, CTLFLAG_RD, 168 &nfsv3_diskless.swap_saddr, sizeof nfsv3_diskless.swap_saddr, 169 "%Ssockaddr_in",""); 170 171 172 void nfsargs_ntoh (struct nfs_args *); 173 static int nfs_mountdiskless (char *, char *, int, 174 struct sockaddr_in *, struct nfs_args *, 175 struct thread *, struct vnode **, 176 struct mount **); 177 static void nfs_convert_diskless (void); 178 static void nfs_convert_oargs (struct nfs_args *args, 179 struct onfs_args *oargs); 180 181 /* 182 * Calculate the buffer I/O block size to use. The maximum V2 block size 183 * is typically 8K, the maximum datagram size is typically 16K, and the 184 * maximum V3 block size is typically 32K. The buffer cache tends to work 185 * best with 16K blocks but we allow 32K for TCP connections. 186 * 187 * We force the block size to be at least a page for buffer cache efficiency. 188 */ 189 static 190 int 191 nfs_iosize(int v3, int sotype) 192 { 193 int iosize; 194 int iomax; 195 196 if (v3) { 197 if (sotype == SOCK_STREAM) 198 iomax = NFS_MAXDATA; 199 else 200 iomax = NFS_MAXDGRAMDATA; 201 } else { 202 iomax = NFS_V2MAXDATA; 203 } 204 if ((iosize = nfs_io_size) > iomax) 205 iosize = iomax; 206 if (iosize < PAGE_SIZE) 207 iosize = PAGE_SIZE; 208 209 /* 210 * This is an aweful hack but until the buffer cache is rewritten 211 * we need it. The problem is that when you combine write() with 212 * mmap() the vm_page->valid bits can become weird looking 213 * (e.g. 0xfc). This occurs because NFS uses piecemeal buffers 214 * at the file EOF. To solve the problem the BIO system needs to 215 * be guarenteed that the NFS iosize for regular files will be a 216 * multiple of PAGE_SIZE so it can invalidate the whole page 217 * rather then just the piece of it owned by the buffer when 218 * NFS does vinvalbuf() calls. 219 */ 220 if (iosize & PAGE_MASK) 221 iosize = (iosize & ~PAGE_MASK) + PAGE_SIZE; 222 return iosize; 223 } 224 225 static void 226 nfs_convert_oargs(args, oargs) 227 struct nfs_args *args; 228 struct onfs_args *oargs; 229 { 230 args->version = NFS_ARGSVERSION; 231 args->addr = oargs->addr; 232 args->addrlen = oargs->addrlen; 233 args->sotype = oargs->sotype; 234 args->proto = oargs->proto; 235 args->fh = oargs->fh; 236 args->fhsize = oargs->fhsize; 237 args->flags = oargs->flags; 238 args->wsize = oargs->wsize; 239 args->rsize = oargs->rsize; 240 args->readdirsize = oargs->readdirsize; 241 args->timeo = oargs->timeo; 242 args->retrans = oargs->retrans; 243 args->maxgrouplist = oargs->maxgrouplist; 244 args->readahead = oargs->readahead; 245 args->leaseterm = oargs->leaseterm; 246 args->deadthresh = oargs->deadthresh; 247 args->hostname = oargs->hostname; 248 } 249 250 static void 251 nfs_convert_diskless() 252 { 253 int i; 254 255 bcopy(&nfs_diskless.myif, &nfsv3_diskless.myif, 256 sizeof(struct ifaliasreq)); 257 bcopy(&nfs_diskless.mygateway, &nfsv3_diskless.mygateway, 258 sizeof(struct sockaddr_in)); 259 nfs_convert_oargs(&nfsv3_diskless.swap_args,&nfs_diskless.swap_args); 260 261 bcopy(nfs_diskless.swap_fh,nfsv3_diskless.swap_fh,NFSX_V2FH); 262 nfsv3_diskless.swap_fhsize = NFSX_V2FH; 263 for (i = NFSX_V2FH - 1; i >= 0; --i) { 264 if (nfs_diskless.swap_fh[i]) 265 break; 266 } 267 if (i < 0) 268 nfsv3_diskless.swap_fhsize = 0; 269 270 bcopy(&nfs_diskless.swap_saddr,&nfsv3_diskless.swap_saddr, 271 sizeof(struct sockaddr_in)); 272 bcopy(nfs_diskless.swap_hostnam,nfsv3_diskless.swap_hostnam, MNAMELEN); 273 nfsv3_diskless.swap_nblks = nfs_diskless.swap_nblks; 274 bcopy(&nfs_diskless.swap_ucred, &nfsv3_diskless.swap_ucred, 275 sizeof(struct ucred)); 276 nfs_convert_oargs(&nfsv3_diskless.root_args,&nfs_diskless.root_args); 277 278 bcopy(nfs_diskless.root_fh,nfsv3_diskless.root_fh,NFSX_V2FH); 279 nfsv3_diskless.root_fhsize = NFSX_V2FH; 280 for (i = NFSX_V2FH - 1; i >= 0; --i) { 281 if (nfs_diskless.root_fh[i]) 282 break; 283 } 284 if (i < 0) 285 nfsv3_diskless.root_fhsize = 0; 286 287 bcopy(&nfs_diskless.root_saddr,&nfsv3_diskless.root_saddr, 288 sizeof(struct sockaddr_in)); 289 bcopy(nfs_diskless.root_hostnam,nfsv3_diskless.root_hostnam, MNAMELEN); 290 nfsv3_diskless.root_time = nfs_diskless.root_time; 291 bcopy(nfs_diskless.my_hostnam,nfsv3_diskless.my_hostnam, 292 MAXHOSTNAMELEN); 293 nfs_diskless_valid = 3; 294 } 295 296 /* 297 * nfs statfs call 298 */ 299 int 300 nfs_statfs(struct mount *mp, struct statfs *sbp, struct thread *td) 301 { 302 struct vnode *vp; 303 struct nfs_statfs *sfp; 304 caddr_t cp; 305 u_int32_t *tl; 306 int32_t t1, t2; 307 caddr_t bpos, dpos, cp2; 308 struct nfsmount *nmp = VFSTONFS(mp); 309 int error = 0, v3 = (nmp->nm_flag & NFSMNT_NFSV3), retattr; 310 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 311 struct ucred *cred; 312 struct nfsnode *np; 313 u_quad_t tquad; 314 315 #ifndef nolint 316 sfp = (struct nfs_statfs *)0; 317 #endif 318 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np); 319 if (error) 320 return (error); 321 vp = NFSTOV(np); 322 cred = crget(); 323 cred->cr_ngroups = 1; 324 if (v3 && (nmp->nm_state & NFSSTA_GOTFSINFO) == 0) 325 (void)nfs_fsinfo(nmp, vp, td); 326 nfsstats.rpccnt[NFSPROC_FSSTAT]++; 327 nfsm_reqhead(vp, NFSPROC_FSSTAT, NFSX_FH(v3)); 328 nfsm_fhtom(vp, v3); 329 nfsm_request(vp, NFSPROC_FSSTAT, td, cred); 330 if (v3) 331 nfsm_postop_attr(vp, retattr, NFS_LATTR_NOSHRINK); 332 if (error) { 333 if (mrep != NULL) 334 m_freem(mrep); 335 goto nfsmout; 336 } 337 nfsm_dissect(sfp, struct nfs_statfs *, NFSX_STATFS(v3)); 338 sbp->f_flags = nmp->nm_flag; 339 sbp->f_iosize = nfs_iosize(v3, nmp->nm_sotype); 340 341 if (v3) { 342 sbp->f_bsize = NFS_FABLKSIZE; 343 tquad = fxdr_hyper(&sfp->sf_tbytes); 344 sbp->f_blocks = (long)(tquad / ((u_quad_t)NFS_FABLKSIZE)); 345 tquad = fxdr_hyper(&sfp->sf_fbytes); 346 sbp->f_bfree = (long)(tquad / ((u_quad_t)NFS_FABLKSIZE)); 347 tquad = fxdr_hyper(&sfp->sf_abytes); 348 sbp->f_bavail = (long)(tquad / ((u_quad_t)NFS_FABLKSIZE)); 349 sbp->f_files = (fxdr_unsigned(int32_t, 350 sfp->sf_tfiles.nfsuquad[1]) & 0x7fffffff); 351 sbp->f_ffree = (fxdr_unsigned(int32_t, 352 sfp->sf_ffiles.nfsuquad[1]) & 0x7fffffff); 353 } else { 354 sbp->f_bsize = fxdr_unsigned(int32_t, sfp->sf_bsize); 355 sbp->f_blocks = fxdr_unsigned(int32_t, sfp->sf_blocks); 356 sbp->f_bfree = fxdr_unsigned(int32_t, sfp->sf_bfree); 357 sbp->f_bavail = fxdr_unsigned(int32_t, sfp->sf_bavail); 358 sbp->f_files = 0; 359 sbp->f_ffree = 0; 360 } 361 if (sbp != &mp->mnt_stat) { 362 sbp->f_type = mp->mnt_vfc->vfc_typenum; 363 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); 364 } 365 m_freem(mrep); 366 nfsmout: 367 vput(vp); 368 crfree(cred); 369 return (error); 370 } 371 372 /* 373 * nfs version 3 fsinfo rpc call 374 */ 375 int 376 nfs_fsinfo(struct nfsmount *nmp, struct vnode *vp, struct thread *td) 377 { 378 struct nfsv3_fsinfo *fsp; 379 caddr_t cp; 380 int32_t t1, t2; 381 u_int32_t *tl, pref, max; 382 caddr_t bpos, dpos, cp2; 383 int error = 0, retattr; 384 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 385 u_int64_t maxfsize; 386 387 nfsstats.rpccnt[NFSPROC_FSINFO]++; 388 nfsm_reqhead(vp, NFSPROC_FSINFO, NFSX_FH(1)); 389 nfsm_fhtom(vp, 1); 390 nfsm_request(vp, NFSPROC_FSINFO, td, nfs_vpcred(vp, ND_READ)); 391 nfsm_postop_attr(vp, retattr, NFS_LATTR_NOSHRINK); 392 if (!error) { 393 nfsm_dissect(fsp, struct nfsv3_fsinfo *, NFSX_V3FSINFO); 394 pref = fxdr_unsigned(u_int32_t, fsp->fs_wtpref); 395 if (pref < nmp->nm_wsize && pref >= NFS_FABLKSIZE) 396 nmp->nm_wsize = (pref + NFS_FABLKSIZE - 1) & 397 ~(NFS_FABLKSIZE - 1); 398 max = fxdr_unsigned(u_int32_t, fsp->fs_wtmax); 399 if (max < nmp->nm_wsize && max > 0) { 400 nmp->nm_wsize = max & ~(NFS_FABLKSIZE - 1); 401 if (nmp->nm_wsize == 0) 402 nmp->nm_wsize = max; 403 } 404 pref = fxdr_unsigned(u_int32_t, fsp->fs_rtpref); 405 if (pref < nmp->nm_rsize && pref >= NFS_FABLKSIZE) 406 nmp->nm_rsize = (pref + NFS_FABLKSIZE - 1) & 407 ~(NFS_FABLKSIZE - 1); 408 max = fxdr_unsigned(u_int32_t, fsp->fs_rtmax); 409 if (max < nmp->nm_rsize && max > 0) { 410 nmp->nm_rsize = max & ~(NFS_FABLKSIZE - 1); 411 if (nmp->nm_rsize == 0) 412 nmp->nm_rsize = max; 413 } 414 pref = fxdr_unsigned(u_int32_t, fsp->fs_dtpref); 415 if (pref < nmp->nm_readdirsize && pref >= NFS_DIRBLKSIZ) 416 nmp->nm_readdirsize = (pref + NFS_DIRBLKSIZ - 1) & 417 ~(NFS_DIRBLKSIZ - 1); 418 if (max < nmp->nm_readdirsize && max > 0) { 419 nmp->nm_readdirsize = max & ~(NFS_DIRBLKSIZ - 1); 420 if (nmp->nm_readdirsize == 0) 421 nmp->nm_readdirsize = max; 422 } 423 maxfsize = fxdr_hyper(&fsp->fs_maxfilesize); 424 if (maxfsize > 0 && maxfsize < nmp->nm_maxfilesize) 425 nmp->nm_maxfilesize = maxfsize; 426 nmp->nm_state |= NFSSTA_GOTFSINFO; 427 } 428 m_freem(mrep); 429 nfsmout: 430 return (error); 431 } 432 433 /* 434 * Mount a remote root fs via. nfs. This depends on the info in the 435 * nfs_diskless structure that has been filled in properly by some primary 436 * bootstrap. 437 * It goes something like this: 438 * - do enough of "ifconfig" by calling ifioctl() so that the system 439 * can talk to the server 440 * - If nfs_diskless.mygateway is filled in, use that address as 441 * a default gateway. 442 * - build the rootfs mount point and call mountnfs() to do the rest. 443 */ 444 int 445 nfs_mountroot(mp) 446 struct mount *mp; 447 { 448 struct mount *swap_mp; 449 struct nfsv3_diskless *nd = &nfsv3_diskless; 450 struct socket *so; 451 struct vnode *vp; 452 struct thread *td = curthread; /* XXX */ 453 int error, i; 454 u_long l; 455 char buf[128]; 456 457 #if defined(BOOTP_NFSROOT) && defined(BOOTP) 458 bootpc_init(); /* use bootp to get nfs_diskless filled in */ 459 #endif 460 461 /* 462 * XXX time must be non-zero when we init the interface or else 463 * the arp code will wedge... 464 */ 465 while (mycpu->gd_time_seconds == 0) 466 tsleep(mycpu, 0, "arpkludge", 10); 467 468 /* 469 * The boot code may have passed us a diskless structure. 470 */ 471 if (nfs_diskless_valid == 1) 472 nfs_convert_diskless(); 473 474 #define SINP(sockaddr) ((struct sockaddr_in *)(sockaddr)) 475 printf("nfs_mountroot: interface %s ip %s", 476 nd->myif.ifra_name, 477 inet_ntoa(SINP(&nd->myif.ifra_addr)->sin_addr)); 478 printf(" bcast %s", 479 inet_ntoa(SINP(&nd->myif.ifra_broadaddr)->sin_addr)); 480 printf(" mask %s\n", 481 inet_ntoa(SINP(&nd->myif.ifra_mask)->sin_addr)); 482 #undef SINP 483 484 /* 485 * XXX splnet, so networks will receive... 486 */ 487 crit_enter(); 488 489 /* 490 * BOOTP does not necessarily have to be compiled into the kernel 491 * for an NFS root to work. If we inherited the network 492 * configuration for PXEBOOT then pxe_setup_nfsdiskless() has figured 493 * out our interface for us and all we need to do is ifconfig the 494 * interface. We only do this if the interface has not already been 495 * ifconfig'd by e.g. BOOTP. 496 */ 497 error = socreate(nd->myif.ifra_addr.sa_family, &so, SOCK_DGRAM, 0, td); 498 if (error) { 499 panic("nfs_mountroot: socreate(%04x): %d", 500 nd->myif.ifra_addr.sa_family, error); 501 } 502 503 error = ifioctl(so, SIOCAIFADDR, (caddr_t)&nd->myif, td); 504 if (error) 505 panic("nfs_mountroot: SIOCAIFADDR: %d", error); 506 507 soclose(so); 508 509 /* 510 * If the gateway field is filled in, set it as the default route. 511 */ 512 if (nd->mygateway.sin_len != 0) { 513 struct sockaddr_in mask, sin; 514 515 bzero((caddr_t)&mask, sizeof(mask)); 516 sin = mask; 517 sin.sin_family = AF_INET; 518 sin.sin_len = sizeof(sin); 519 printf("nfs_mountroot: gateway %s\n", 520 inet_ntoa(nd->mygateway.sin_addr)); 521 error = rtrequest_global(RTM_ADD, (struct sockaddr *)&sin, 522 (struct sockaddr *)&nd->mygateway, 523 (struct sockaddr *)&mask, 524 RTF_UP | RTF_GATEWAY); 525 if (error) 526 printf("nfs_mountroot: unable to set gateway, error %d, continuing anyway\n", error); 527 } 528 529 /* 530 * Create the rootfs mount point. 531 */ 532 nd->root_args.fh = nd->root_fh; 533 nd->root_args.fhsize = nd->root_fhsize; 534 l = ntohl(nd->root_saddr.sin_addr.s_addr); 535 snprintf(buf, sizeof(buf), "%ld.%ld.%ld.%ld:%s", 536 (l >> 24) & 0xff, (l >> 16) & 0xff, 537 (l >> 8) & 0xff, (l >> 0) & 0xff,nd->root_hostnam); 538 printf("NFS ROOT: %s\n",buf); 539 if ((error = nfs_mountdiskless(buf, "/", MNT_RDONLY, 540 &nd->root_saddr, &nd->root_args, td, &vp, &mp)) != 0) { 541 if (swap_mp) { 542 mp->mnt_vfc->vfc_refcount--; 543 free(swap_mp, M_MOUNT); 544 } 545 crit_exit(); 546 return (error); 547 } 548 549 swap_mp = NULL; 550 if (nd->swap_nblks) { 551 552 /* Convert to DEV_BSIZE instead of Kilobyte */ 553 nd->swap_nblks *= 2; 554 555 /* 556 * Create a fake mount point just for the swap vnode so that the 557 * swap file can be on a different server from the rootfs. 558 */ 559 nd->swap_args.fh = nd->swap_fh; 560 nd->swap_args.fhsize = nd->swap_fhsize; 561 l = ntohl(nd->swap_saddr.sin_addr.s_addr); 562 snprintf(buf, sizeof(buf), "%ld.%ld.%ld.%ld:%s", 563 (l >> 24) & 0xff, (l >> 16) & 0xff, 564 (l >> 8) & 0xff, (l >> 0) & 0xff,nd->swap_hostnam); 565 printf("NFS SWAP: %s\n",buf); 566 if ((error = nfs_mountdiskless(buf, "/swap", 0, 567 &nd->swap_saddr, &nd->swap_args, td, &vp, &swap_mp)) != 0) { 568 crit_exit(); 569 return (error); 570 } 571 vfs_unbusy(swap_mp, td); 572 573 VTONFS(vp)->n_size = VTONFS(vp)->n_vattr.va_size = 574 nd->swap_nblks * DEV_BSIZE ; 575 576 /* 577 * Since the swap file is not the root dir of a file system, 578 * hack it to a regular file. 579 */ 580 vp->v_type = VREG; 581 vp->v_flag = 0; 582 vref(vp); 583 swaponvp(td, vp, nd->swap_nblks); 584 } 585 586 mp->mnt_flag |= MNT_ROOTFS; 587 mp->mnt_vnodecovered = NULLVP; 588 vfs_unbusy(mp, td); 589 590 /* 591 * This is not really an nfs issue, but it is much easier to 592 * set hostname here and then let the "/etc/rc.xxx" files 593 * mount the right /var based upon its preset value. 594 */ 595 bcopy(nd->my_hostnam, hostname, MAXHOSTNAMELEN); 596 hostname[MAXHOSTNAMELEN - 1] = '\0'; 597 for (i = 0; i < MAXHOSTNAMELEN; i++) 598 if (hostname[i] == '\0') 599 break; 600 inittodr(ntohl(nd->root_time)); 601 crit_exit(); 602 return (0); 603 } 604 605 /* 606 * Internal version of mount system call for diskless setup. 607 */ 608 static int 609 nfs_mountdiskless(char *path, char *which, int mountflag, 610 struct sockaddr_in *sin, struct nfs_args *args, struct thread *td, 611 struct vnode **vpp, struct mount **mpp) 612 { 613 struct mount *mp; 614 struct sockaddr *nam; 615 int didalloc = 0; 616 int error; 617 618 mp = *mpp; 619 620 if (mp == NULL) { 621 if ((error = vfs_rootmountalloc("nfs", path, &mp)) != 0) { 622 printf("nfs_mountroot: NFS not configured"); 623 return (error); 624 } 625 didalloc = 1; 626 } 627 mp->mnt_kern_flag = 0; 628 mp->mnt_flag = mountflag; 629 nam = dup_sockaddr((struct sockaddr *)sin); 630 631 #if defined(BOOTP) || defined(NFS_ROOT) 632 if (args->fhsize == 0) { 633 printf("NFS_ROOT: No FH passed from loader, attempting mount rpc..."); 634 args->fhsize = 0; 635 error = md_mount(sin, which, args->fh, &args->fhsize, args, td); 636 if (error) { 637 printf("failed.\n"); 638 goto haderror; 639 } 640 printf("success!\n"); 641 } 642 #endif 643 644 if ((error = mountnfs(args, mp, nam, which, path, vpp)) != 0) { 645 #if defined(BOOTP) || defined(NFS_ROOT) 646 haderror: 647 #endif 648 printf("nfs_mountroot: mount %s on %s: %d", path, which, error); 649 mp->mnt_vfc->vfc_refcount--; 650 vfs_unbusy(mp, td); 651 if (didalloc) 652 free(mp, M_MOUNT); 653 FREE(nam, M_SONAME); 654 return (error); 655 } 656 *mpp = mp; 657 return (0); 658 } 659 660 static void 661 nfs_decode_args(nmp, argp) 662 struct nfsmount *nmp; 663 struct nfs_args *argp; 664 { 665 int adjsock; 666 int maxio; 667 668 crit_enter(); 669 /* 670 * Silently clear NFSMNT_NOCONN if it's a TCP mount, it makes 671 * no sense in that context. 672 */ 673 if (argp->sotype == SOCK_STREAM) 674 nmp->nm_flag &= ~NFSMNT_NOCONN; 675 676 /* Also clear RDIRPLUS if not NFSv3, it crashes some servers */ 677 if ((argp->flags & NFSMNT_NFSV3) == 0) 678 nmp->nm_flag &= ~NFSMNT_RDIRPLUS; 679 680 /* Re-bind if rsrvd port requested and wasn't on one */ 681 adjsock = !(nmp->nm_flag & NFSMNT_RESVPORT) 682 && (argp->flags & NFSMNT_RESVPORT); 683 /* Also re-bind if we're switching to/from a connected UDP socket */ 684 adjsock |= ((nmp->nm_flag & NFSMNT_NOCONN) != 685 (argp->flags & NFSMNT_NOCONN)); 686 687 /* Update flags atomically. Don't change the lock bits. */ 688 nmp->nm_flag = argp->flags | nmp->nm_flag; 689 crit_exit(); 690 691 if ((argp->flags & NFSMNT_TIMEO) && argp->timeo > 0) { 692 nmp->nm_timeo = (argp->timeo * NFS_HZ + 5) / 10; 693 if (nmp->nm_timeo < NFS_MINTIMEO) 694 nmp->nm_timeo = NFS_MINTIMEO; 695 else if (nmp->nm_timeo > NFS_MAXTIMEO) 696 nmp->nm_timeo = NFS_MAXTIMEO; 697 } 698 699 if ((argp->flags & NFSMNT_RETRANS) && argp->retrans > 1) { 700 nmp->nm_retry = argp->retrans; 701 if (nmp->nm_retry > NFS_MAXREXMIT) 702 nmp->nm_retry = NFS_MAXREXMIT; 703 } 704 705 maxio = nfs_iosize(argp->flags & NFSMNT_NFSV3, argp->sotype); 706 707 if ((argp->flags & NFSMNT_WSIZE) && argp->wsize > 0) { 708 nmp->nm_wsize = argp->wsize; 709 /* Round down to multiple of blocksize */ 710 nmp->nm_wsize &= ~(NFS_FABLKSIZE - 1); 711 if (nmp->nm_wsize <= 0) 712 nmp->nm_wsize = NFS_FABLKSIZE; 713 } 714 if (nmp->nm_wsize > maxio) 715 nmp->nm_wsize = maxio; 716 if (nmp->nm_wsize > MAXBSIZE) 717 nmp->nm_wsize = MAXBSIZE; 718 719 if ((argp->flags & NFSMNT_RSIZE) && argp->rsize > 0) { 720 nmp->nm_rsize = argp->rsize; 721 /* Round down to multiple of blocksize */ 722 nmp->nm_rsize &= ~(NFS_FABLKSIZE - 1); 723 if (nmp->nm_rsize <= 0) 724 nmp->nm_rsize = NFS_FABLKSIZE; 725 } 726 if (nmp->nm_rsize > maxio) 727 nmp->nm_rsize = maxio; 728 if (nmp->nm_rsize > MAXBSIZE) 729 nmp->nm_rsize = MAXBSIZE; 730 731 if ((argp->flags & NFSMNT_READDIRSIZE) && argp->readdirsize > 0) { 732 nmp->nm_readdirsize = argp->readdirsize; 733 } 734 if (nmp->nm_readdirsize > maxio) 735 nmp->nm_readdirsize = maxio; 736 if (nmp->nm_readdirsize > nmp->nm_rsize) 737 nmp->nm_readdirsize = nmp->nm_rsize; 738 739 if ((argp->flags & NFSMNT_ACREGMIN) && argp->acregmin >= 0) 740 nmp->nm_acregmin = argp->acregmin; 741 else 742 nmp->nm_acregmin = NFS_MINATTRTIMO; 743 if ((argp->flags & NFSMNT_ACREGMAX) && argp->acregmax >= 0) 744 nmp->nm_acregmax = argp->acregmax; 745 else 746 nmp->nm_acregmax = NFS_MAXATTRTIMO; 747 if ((argp->flags & NFSMNT_ACDIRMIN) && argp->acdirmin >= 0) 748 nmp->nm_acdirmin = argp->acdirmin; 749 else 750 nmp->nm_acdirmin = NFS_MINDIRATTRTIMO; 751 if ((argp->flags & NFSMNT_ACDIRMAX) && argp->acdirmax >= 0) 752 nmp->nm_acdirmax = argp->acdirmax; 753 else 754 nmp->nm_acdirmax = NFS_MAXDIRATTRTIMO; 755 if (nmp->nm_acdirmin > nmp->nm_acdirmax) 756 nmp->nm_acdirmin = nmp->nm_acdirmax; 757 if (nmp->nm_acregmin > nmp->nm_acregmax) 758 nmp->nm_acregmin = nmp->nm_acregmax; 759 760 if ((argp->flags & NFSMNT_MAXGRPS) && argp->maxgrouplist >= 0) { 761 if (argp->maxgrouplist <= NFS_MAXGRPS) 762 nmp->nm_numgrps = argp->maxgrouplist; 763 else 764 nmp->nm_numgrps = NFS_MAXGRPS; 765 } 766 if ((argp->flags & NFSMNT_READAHEAD) && argp->readahead >= 0) { 767 if (argp->readahead <= NFS_MAXRAHEAD) 768 nmp->nm_readahead = argp->readahead; 769 else 770 nmp->nm_readahead = NFS_MAXRAHEAD; 771 } 772 if ((argp->flags & NFSMNT_LEASETERM) && argp->leaseterm >= 2) { 773 if (argp->leaseterm <= NQ_MAXLEASE) 774 nmp->nm_leaseterm = argp->leaseterm; 775 else 776 nmp->nm_leaseterm = NQ_MAXLEASE; 777 } 778 if ((argp->flags & NFSMNT_DEADTHRESH) && argp->deadthresh >= 1) { 779 if (argp->deadthresh <= NQ_NEVERDEAD) 780 nmp->nm_deadthresh = argp->deadthresh; 781 else 782 nmp->nm_deadthresh = NQ_NEVERDEAD; 783 } 784 785 adjsock |= ((nmp->nm_sotype != argp->sotype) || 786 (nmp->nm_soproto != argp->proto)); 787 nmp->nm_sotype = argp->sotype; 788 nmp->nm_soproto = argp->proto; 789 790 if (nmp->nm_so && adjsock) { 791 nfs_safedisconnect(nmp); 792 if (nmp->nm_sotype == SOCK_DGRAM) 793 while (nfs_connect(nmp, (struct nfsreq *)0)) { 794 printf("nfs_args: retrying connect\n"); 795 (void) tsleep((caddr_t)&lbolt, 0, "nfscon", 0); 796 } 797 } 798 } 799 800 /* 801 * VFS Operations. 802 * 803 * mount system call 804 * It seems a bit dumb to copyinstr() the host and path here and then 805 * bcopy() them in mountnfs(), but I wanted to detect errors before 806 * doing the sockargs() call because sockargs() allocates an mbuf and 807 * an error after that means that I have to release the mbuf. 808 */ 809 /* ARGSUSED */ 810 static int 811 nfs_mount(struct mount *mp, char *path, caddr_t data, struct thread *td) 812 { 813 int error; 814 struct nfs_args args; 815 struct sockaddr *nam; 816 struct vnode *vp; 817 char pth[MNAMELEN], hst[MNAMELEN]; 818 size_t len; 819 u_char nfh[NFSX_V3FHMAX]; 820 821 if (path == NULL) { 822 nfs_mountroot(mp); 823 return (0); 824 } 825 error = copyin(data, (caddr_t)&args, sizeof (struct nfs_args)); 826 if (error) 827 return (error); 828 if (args.version != NFS_ARGSVERSION) { 829 #ifdef COMPAT_PRELITE2 830 /* 831 * If the argument version is unknown, then assume the 832 * caller is a pre-lite2 4.4BSD client and convert its 833 * arguments. 834 */ 835 struct onfs_args oargs; 836 error = copyin(data, (caddr_t)&oargs, sizeof (struct onfs_args)); 837 if (error) 838 return (error); 839 nfs_convert_oargs(&args,&oargs); 840 #else /* !COMPAT_PRELITE2 */ 841 return (EPROGMISMATCH); 842 #endif /* COMPAT_PRELITE2 */ 843 } 844 if (mp->mnt_flag & MNT_UPDATE) { 845 struct nfsmount *nmp = VFSTONFS(mp); 846 847 if (nmp == NULL) 848 return (EIO); 849 /* 850 * When doing an update, we can't change from or to 851 * v3 and/or nqnfs, or change cookie translation 852 */ 853 args.flags = (args.flags & 854 ~(NFSMNT_NFSV3|NFSMNT_NQNFS /*|NFSMNT_XLATECOOKIE*/)) | 855 (nmp->nm_flag & 856 (NFSMNT_NFSV3|NFSMNT_NQNFS /*|NFSMNT_XLATECOOKIE*/)); 857 nfs_decode_args(nmp, &args); 858 return (0); 859 } 860 861 /* 862 * Make the nfs_ip_paranoia sysctl serve as the default connection 863 * or no-connection mode for those protocols that support 864 * no-connection mode (the flag will be cleared later for protocols 865 * that do not support no-connection mode). This will allow a client 866 * to receive replies from a different IP then the request was 867 * sent to. Note: default value for nfs_ip_paranoia is 1 (paranoid), 868 * not 0. 869 */ 870 if (nfs_ip_paranoia == 0) 871 args.flags |= NFSMNT_NOCONN; 872 if (args.fhsize < 0 || args.fhsize > NFSX_V3FHMAX) 873 return (EINVAL); 874 error = copyin((caddr_t)args.fh, (caddr_t)nfh, args.fhsize); 875 if (error) 876 return (error); 877 error = copyinstr(path, pth, MNAMELEN-1, &len); 878 if (error) 879 return (error); 880 bzero(&pth[len], MNAMELEN - len); 881 error = copyinstr(args.hostname, hst, MNAMELEN-1, &len); 882 if (error) 883 return (error); 884 bzero(&hst[len], MNAMELEN - len); 885 /* sockargs() call must be after above copyin() calls */ 886 error = getsockaddr(&nam, (caddr_t)args.addr, args.addrlen); 887 if (error) 888 return (error); 889 args.fh = nfh; 890 error = mountnfs(&args, mp, nam, pth, hst, &vp); 891 return (error); 892 } 893 894 /* 895 * Common code for mount and mountroot 896 */ 897 static int 898 mountnfs(struct nfs_args *argp, struct mount *mp, struct sockaddr *nam, 899 char *pth, char *hst, struct vnode **vpp) 900 { 901 struct nfsmount *nmp; 902 struct nfsnode *np; 903 int error; 904 905 if (mp->mnt_flag & MNT_UPDATE) { 906 nmp = VFSTONFS(mp); 907 /* update paths, file handles, etc, here XXX */ 908 FREE(nam, M_SONAME); 909 return (0); 910 } else { 911 nmp = zalloc(nfsmount_zone); 912 bzero((caddr_t)nmp, sizeof (struct nfsmount)); 913 TAILQ_INIT(&nmp->nm_uidlruhead); 914 TAILQ_INIT(&nmp->nm_bioq); 915 mp->mnt_data = (qaddr_t)nmp; 916 } 917 vfs_getnewfsid(mp); 918 nmp->nm_mountp = mp; 919 if (argp->flags & NFSMNT_NQNFS) { 920 /* 921 * We have to set mnt_maxsymlink to a non-zero value so 922 * that COMPAT_43 routines will know that we are setting 923 * the d_type field in directories (and can zero it for 924 * unsuspecting binaries). 925 */ 926 mp->mnt_maxsymlinklen = 1; 927 } 928 929 /* 930 * V2 can only handle 32 bit filesizes. A 4GB-1 limit may be too 931 * high, depending on whether we end up with negative offsets in 932 * the client or server somewhere. 2GB-1 may be safer. 933 * 934 * For V3, nfs_fsinfo will adjust this as necessary. Assume maximum 935 * that we can handle until we find out otherwise. 936 * XXX Our "safe" limit on the client is what we can store in our 937 * buffer cache using signed(!) block numbers. 938 */ 939 if ((argp->flags & NFSMNT_NFSV3) == 0) 940 nmp->nm_maxfilesize = 0xffffffffLL; 941 else 942 nmp->nm_maxfilesize = (u_int64_t)0x80000000 * DEV_BSIZE - 1; 943 944 nmp->nm_timeo = NFS_TIMEO; 945 nmp->nm_retry = NFS_RETRANS; 946 nmp->nm_wsize = nfs_iosize(argp->flags & NFSMNT_NFSV3, argp->sotype); 947 nmp->nm_rsize = nmp->nm_wsize; 948 nmp->nm_readdirsize = NFS_READDIRSIZE; 949 nmp->nm_numgrps = NFS_MAXGRPS; 950 nmp->nm_readahead = NFS_DEFRAHEAD; 951 nmp->nm_leaseterm = NQ_DEFLEASE; 952 nmp->nm_deadthresh = NQ_DEADTHRESH; 953 CIRCLEQ_INIT(&nmp->nm_timerhead); 954 nmp->nm_inprog = NULLVP; 955 nmp->nm_fhsize = argp->fhsize; 956 bcopy((caddr_t)argp->fh, (caddr_t)nmp->nm_fh, argp->fhsize); 957 bcopy(hst, mp->mnt_stat.f_mntfromname, MNAMELEN); 958 nmp->nm_nam = nam; 959 /* Set up the sockets and per-host congestion */ 960 nmp->nm_sotype = argp->sotype; 961 nmp->nm_soproto = argp->proto; 962 nmp->nm_cred = crhold(proc0.p_ucred); 963 964 nfs_decode_args(nmp, argp); 965 966 /* 967 * For Connection based sockets (TCP,...) defer the connect until 968 * the first request, in case the server is not responding. 969 */ 970 if (nmp->nm_sotype == SOCK_DGRAM && 971 (error = nfs_connect(nmp, (struct nfsreq *)0))) 972 goto bad; 973 974 /* 975 * This is silly, but it has to be set so that vinifod() works. 976 * We do not want to do an nfs_statfs() here since we can get 977 * stuck on a dead server and we are holding a lock on the mount 978 * point. 979 */ 980 mp->mnt_stat.f_iosize = 981 nfs_iosize(nmp->nm_flag & NFSMNT_NFSV3, nmp->nm_sotype); 982 983 /* 984 * Install vop_ops for our vnops 985 */ 986 vfs_add_vnodeops(mp, &mp->mnt_vn_norm_ops, 987 nfsv2_vnodeop_entries, 0); 988 vfs_add_vnodeops(mp, &mp->mnt_vn_spec_ops, 989 nfsv2_specop_entries, 0); 990 vfs_add_vnodeops(mp, &mp->mnt_vn_fifo_ops, 991 nfsv2_fifoop_entries, 0); 992 993 /* 994 * A reference count is needed on the nfsnode representing the 995 * remote root. If this object is not persistent, then backward 996 * traversals of the mount point (i.e. "..") will not work if 997 * the nfsnode gets flushed out of the cache. Ufs does not have 998 * this problem, because one can identify root inodes by their 999 * number == ROOTINO (2). 1000 */ 1001 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np); 1002 if (error) 1003 goto bad; 1004 *vpp = NFSTOV(np); 1005 1006 /* 1007 * Retrieval of mountpoint attributes is delayed until nfs_rot 1008 * or nfs_statfs are first called. This will happen either when 1009 * we first traverse the mount point or if somebody does a df(1). 1010 * 1011 * NFSSTA_GOTFSINFO is used to flag if we have successfully 1012 * retrieved mountpoint attributes. In the case of NFSv3 we 1013 * also flag static fsinfo. 1014 */ 1015 if (*vpp != NULL) 1016 (*vpp)->v_type = VNON; 1017 1018 /* 1019 * Lose the lock but keep the ref. 1020 */ 1021 VOP_UNLOCK(*vpp, 0, curthread); 1022 1023 return (0); 1024 bad: 1025 nfs_disconnect(nmp); 1026 nfs_free_mount(nmp); 1027 FREE(nam, M_SONAME); 1028 return (error); 1029 } 1030 1031 /* 1032 * unmount system call 1033 */ 1034 static int 1035 nfs_unmount(struct mount *mp, int mntflags, struct thread *td) 1036 { 1037 struct nfsmount *nmp; 1038 int error, flags = 0; 1039 1040 if (mntflags & MNT_FORCE) 1041 flags |= FORCECLOSE; 1042 nmp = VFSTONFS(mp); 1043 /* 1044 * Goes something like this.. 1045 * - Call vflush() to clear out vnodes for this file system 1046 * - Close the socket 1047 * - Free up the data structures 1048 */ 1049 /* In the forced case, cancel any outstanding requests. */ 1050 if (flags & FORCECLOSE) { 1051 error = nfs_nmcancelreqs(nmp); 1052 if (error) 1053 return (error); 1054 } 1055 /* 1056 * Must handshake with nqnfs_clientd() if it is active. 1057 */ 1058 nmp->nm_state |= NFSSTA_DISMINPROG; 1059 while (nmp->nm_inprog != NULLVP) 1060 (void) tsleep((caddr_t)&lbolt, 0, "nfsdism", 0); 1061 1062 /* We hold 1 extra ref on the root vnode; see comment in mountnfs(). */ 1063 error = vflush(mp, 1, flags); 1064 if (error) { 1065 nmp->nm_state &= ~NFSSTA_DISMINPROG; 1066 return (error); 1067 } 1068 1069 /* 1070 * We are now committed to the unmount. 1071 * For NQNFS, let the server daemon free the nfsmount structure. 1072 */ 1073 if (nmp->nm_flag & (NFSMNT_NQNFS | NFSMNT_KERB)) 1074 nmp->nm_state |= NFSSTA_DISMNT; 1075 1076 nfs_disconnect(nmp); 1077 FREE(nmp->nm_nam, M_SONAME); 1078 1079 if ((nmp->nm_flag & (NFSMNT_NQNFS | NFSMNT_KERB)) == 0) 1080 nfs_free_mount(nmp); 1081 return (0); 1082 } 1083 1084 void 1085 nfs_free_mount(struct nfsmount *nmp) 1086 { 1087 if (nmp->nm_cred) { 1088 crfree(nmp->nm_cred); 1089 nmp->nm_cred = NULL; 1090 } 1091 zfree(nfsmount_zone, nmp); 1092 } 1093 1094 /* 1095 * Return root of a filesystem 1096 */ 1097 static int 1098 nfs_root(mp, vpp) 1099 struct mount *mp; 1100 struct vnode **vpp; 1101 { 1102 struct vnode *vp; 1103 struct nfsmount *nmp; 1104 struct vattr attrs; 1105 struct nfsnode *np; 1106 int error; 1107 1108 nmp = VFSTONFS(mp); 1109 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np); 1110 if (error) 1111 return (error); 1112 vp = NFSTOV(np); 1113 1114 /* 1115 * Get transfer parameters and root vnode attributes 1116 */ 1117 if ((nmp->nm_state & NFSSTA_GOTFSINFO) == 0) { 1118 if (nmp->nm_flag & NFSMNT_NFSV3) { 1119 nfs_fsinfo(nmp, vp, curthread); 1120 mp->mnt_stat.f_iosize = nfs_iosize(1, nmp->nm_sotype); 1121 } else { 1122 if ((error = VOP_GETATTR(vp, &attrs, curthread)) == 0) 1123 nmp->nm_state |= NFSSTA_GOTFSINFO; 1124 1125 } 1126 } 1127 if (vp->v_type == VNON) 1128 vp->v_type = VDIR; 1129 vp->v_flag = VROOT; 1130 *vpp = vp; 1131 return (0); 1132 } 1133 1134 extern int syncprt; 1135 1136 struct scaninfo { 1137 int rescan; 1138 thread_t td; 1139 int waitfor; 1140 int allerror; 1141 }; 1142 1143 static int nfs_sync_scan1(struct mount *mp, struct vnode *vp, void *data); 1144 static int nfs_sync_scan2(struct mount *mp, struct vnode *vp, void *data); 1145 1146 /* 1147 * Flush out the buffer cache 1148 */ 1149 /* ARGSUSED */ 1150 static int 1151 nfs_sync(struct mount *mp, int waitfor, struct thread *td) 1152 { 1153 struct scaninfo scaninfo; 1154 int error; 1155 1156 scaninfo.rescan = 0; 1157 scaninfo.td = td; 1158 scaninfo.waitfor = waitfor; 1159 scaninfo.allerror = 0; 1160 1161 /* 1162 * Force stale buffer cache information to be flushed. 1163 */ 1164 error = 0; 1165 while (error == 0 && scaninfo.rescan) { 1166 scaninfo.rescan = 0; 1167 error = vmntvnodescan(mp, VMSC_GETVP, nfs_sync_scan1, 1168 nfs_sync_scan2, &scaninfo); 1169 } 1170 return(error); 1171 } 1172 1173 static 1174 int 1175 nfs_sync_scan1(struct mount *mp, struct vnode *vp, void *data) 1176 { 1177 struct scaninfo *info = data; 1178 1179 if (VOP_ISLOCKED(vp, NULL) || RB_EMPTY(&vp->v_rbdirty_tree)) 1180 return(-1); 1181 if (info->waitfor == MNT_LAZY) 1182 return(-1); 1183 return(0); 1184 } 1185 1186 static 1187 int 1188 nfs_sync_scan2(struct mount *mp, struct vnode *vp, void *data) 1189 { 1190 struct scaninfo *info = data; 1191 int error; 1192 1193 error = VOP_FSYNC(vp, info->waitfor, info->td); 1194 if (error) 1195 info->allerror = error; 1196 return(0); 1197 } 1198 1199