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sys/nfsclient/nfs_vfsops.c
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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 * 4. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * @(#)nfs_vfsops.c 8.12 (Berkeley) 5/20/95 33 */ 34 35 #include <sys/cdefs.h> 36 __FBSDID("$FreeBSD: releng/5.3/sys/nfsclient/nfs_vfsops.c 132902 2004-07-30 22:08:52Z phk $"); 37 38 #include "opt_bootp.h" 39 #include "opt_nfsroot.h" 40 41 #include <sys/param.h> 42 #include <sys/systm.h> 43 #include <sys/kernel.h> 44 #include <sys/limits.h> 45 #include <sys/lock.h> 46 #include <sys/malloc.h> 47 #include <sys/mbuf.h> 48 #include <sys/module.h> 49 #include <sys/mount.h> 50 #include <sys/proc.h> 51 #include <sys/socket.h> 52 #include <sys/socketvar.h> 53 #include <sys/sockio.h> 54 #include <sys/sysctl.h> 55 #include <sys/vnode.h> 56 57 #include <vm/vm.h> 58 #include <vm/vm_extern.h> 59 #include <vm/uma.h> 60 61 #include <net/if.h> 62 #include <net/route.h> 63 #include <netinet/in.h> 64 65 #include <rpc/rpcclnt.h> 66 67 #include <nfs/rpcv2.h> 68 #include <nfs/nfsproto.h> 69 #include <nfsclient/nfs.h> 70 #include <nfsclient/nfsnode.h> 71 #include <nfsclient/nfsmount.h> 72 #include <nfs/xdr_subs.h> 73 #include <nfsclient/nfsm_subs.h> 74 #include <nfsclient/nfsdiskless.h> 75 76 MALLOC_DEFINE(M_NFSREQ, "NFS req", "NFS request header"); 77 MALLOC_DEFINE(M_NFSBIGFH, "NFSV3 bigfh", "NFS version 3 file handle"); 78 MALLOC_DEFINE(M_NFSDIROFF, "NFSV3 diroff", "NFS directory offset data"); 79 MALLOC_DEFINE(M_NFSHASH, "NFS hash", "NFS hash tables"); 80 81 uma_zone_t nfsmount_zone; 82 83 struct nfsstats nfsstats; 84 SYSCTL_NODE(_vfs, OID_AUTO, nfs, CTLFLAG_RW, 0, "NFS filesystem"); 85 SYSCTL_STRUCT(_vfs_nfs, NFS_NFSSTATS, nfsstats, CTLFLAG_RD, 86 &nfsstats, nfsstats, "S,nfsstats"); 87 static int nfs_ip_paranoia = 1; 88 SYSCTL_INT(_vfs_nfs, OID_AUTO, nfs_ip_paranoia, CTLFLAG_RW, 89 &nfs_ip_paranoia, 0, ""); 90 #ifdef NFS_DEBUG 91 int nfs_debug; 92 SYSCTL_INT(_vfs_nfs, OID_AUTO, debug, CTLFLAG_RW, &nfs_debug, 0, ""); 93 #endif 94 static int nfs_tprintf_initial_delay = NFS_TPRINTF_INITIAL_DELAY; 95 SYSCTL_INT(_vfs_nfs, NFS_TPRINTF_INITIAL_DELAY, 96 downdelayinitial, CTLFLAG_RW, &nfs_tprintf_initial_delay, 0, ""); 97 /* how long between console messages "nfs server foo not responding" */ 98 static int nfs_tprintf_delay = NFS_TPRINTF_DELAY; 99 SYSCTL_INT(_vfs_nfs, NFS_TPRINTF_DELAY, 100 downdelayinterval, CTLFLAG_RW, &nfs_tprintf_delay, 0, ""); 101 102 static int nfs_iosize(struct nfsmount *nmp); 103 static void nfs_decode_args(struct nfsmount *nmp, struct nfs_args *argp); 104 static int mountnfs(struct nfs_args *, struct mount *, 105 struct sockaddr *, char *, char *, struct vnode **, 106 struct ucred *cred); 107 static vfs_omount_t nfs_omount; 108 static vfs_unmount_t nfs_unmount; 109 static vfs_root_t nfs_root; 110 static vfs_statfs_t nfs_statfs; 111 static vfs_sync_t nfs_sync; 112 static vfs_sysctl_t nfs_sysctl; 113 114 /* 115 * nfs vfs operations. 116 */ 117 static struct vfsops nfs_vfsops = { 118 .vfs_init = nfs_init, 119 .vfs_omount = nfs_omount, 120 .vfs_root = nfs_root, 121 .vfs_statfs = nfs_statfs, 122 .vfs_sync = nfs_sync, 123 .vfs_uninit = nfs_uninit, 124 .vfs_unmount = nfs_unmount, 125 .vfs_sysctl = nfs_sysctl, 126 }; 127 VFS_SET(nfs_vfsops, nfs, VFCF_NETWORK); 128 129 /* So that loader and kldload(2) can find us, wherever we are.. */ 130 MODULE_VERSION(nfs, 1); 131 132 static struct nfs_rpcops nfs_rpcops = { 133 nfs_readrpc, 134 nfs_writerpc, 135 nfs_writebp, 136 nfs_readlinkrpc, 137 nfs_invaldir, 138 nfs_commit, 139 }; 140 141 /* 142 * This structure must be filled in by a primary bootstrap or bootstrap 143 * server for a diskless/dataless machine. It is initialized below just 144 * to ensure that it is allocated to initialized data (.data not .bss). 145 */ 146 struct nfs_diskless nfs_diskless = { { { 0 } } }; 147 struct nfsv3_diskless nfsv3_diskless = { { { 0 } } }; 148 int nfs_diskless_valid = 0; 149 150 SYSCTL_INT(_vfs_nfs, OID_AUTO, diskless_valid, CTLFLAG_RD, 151 &nfs_diskless_valid, 0, ""); 152 153 SYSCTL_STRING(_vfs_nfs, OID_AUTO, diskless_rootpath, CTLFLAG_RD, 154 nfsv3_diskless.root_hostnam, 0, ""); 155 156 SYSCTL_OPAQUE(_vfs_nfs, OID_AUTO, diskless_rootaddr, CTLFLAG_RD, 157 &nfsv3_diskless.root_saddr, sizeof nfsv3_diskless.root_saddr, 158 "%Ssockaddr_in", ""); 159 160 161 void nfsargs_ntoh(struct nfs_args *); 162 static int nfs_mountdiskless(char *, char *, int, 163 struct sockaddr_in *, struct nfs_args *, 164 struct thread *, struct vnode **, struct mount *); 165 static void nfs_convert_diskless(void); 166 static void nfs_convert_oargs(struct nfs_args *args, 167 struct onfs_args *oargs); 168 169 static int 170 nfs_iosize(struct nfsmount *nmp) 171 { 172 int iosize; 173 174 /* 175 * Calculate the size used for io buffers. Use the larger 176 * of the two sizes to minimise nfs requests but make sure 177 * that it is at least one VM page to avoid wasting buffer 178 * space. 179 */ 180 iosize = max(nmp->nm_rsize, nmp->nm_wsize); 181 if (iosize < PAGE_SIZE) iosize = PAGE_SIZE; 182 return iosize; 183 } 184 185 static void 186 nfs_convert_oargs(struct nfs_args *args, struct onfs_args *oargs) 187 { 188 189 args->version = NFS_ARGSVERSION; 190 args->addr = oargs->addr; 191 args->addrlen = oargs->addrlen; 192 args->sotype = oargs->sotype; 193 args->proto = oargs->proto; 194 args->fh = oargs->fh; 195 args->fhsize = oargs->fhsize; 196 args->flags = oargs->flags; 197 args->wsize = oargs->wsize; 198 args->rsize = oargs->rsize; 199 args->readdirsize = oargs->readdirsize; 200 args->timeo = oargs->timeo; 201 args->retrans = oargs->retrans; 202 args->maxgrouplist = oargs->maxgrouplist; 203 args->readahead = oargs->readahead; 204 args->deadthresh = oargs->deadthresh; 205 args->hostname = oargs->hostname; 206 } 207 208 static void 209 nfs_convert_diskless(void) 210 { 211 212 bcopy(&nfs_diskless.myif, &nfsv3_diskless.myif, 213 sizeof(struct ifaliasreq)); 214 bcopy(&nfs_diskless.mygateway, &nfsv3_diskless.mygateway, 215 sizeof(struct sockaddr_in)); 216 nfs_convert_oargs(&nfsv3_diskless.root_args,&nfs_diskless.root_args); 217 nfsv3_diskless.root_fhsize = NFSX_V2FH; 218 bcopy(nfs_diskless.root_fh, nfsv3_diskless.root_fh, NFSX_V2FH); 219 bcopy(&nfs_diskless.root_saddr,&nfsv3_diskless.root_saddr, 220 sizeof(struct sockaddr_in)); 221 bcopy(nfs_diskless.root_hostnam, nfsv3_diskless.root_hostnam, MNAMELEN); 222 nfsv3_diskless.root_time = nfs_diskless.root_time; 223 bcopy(nfs_diskless.my_hostnam, nfsv3_diskless.my_hostnam, 224 MAXHOSTNAMELEN); 225 nfs_diskless_valid = 3; 226 } 227 228 /* 229 * nfs statfs call 230 */ 231 static int 232 nfs_statfs(struct mount *mp, struct statfs *sbp, struct thread *td) 233 { 234 struct vnode *vp; 235 struct nfs_statfs *sfp; 236 caddr_t bpos, dpos; 237 struct nfsmount *nmp = VFSTONFS(mp); 238 int error = 0, v3 = (nmp->nm_flag & NFSMNT_NFSV3), retattr; 239 struct mbuf *mreq, *mrep, *md, *mb; 240 struct nfsnode *np; 241 u_quad_t tquad; 242 int bsize; 243 244 #ifndef nolint 245 sfp = NULL; 246 #endif 247 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np); 248 if (error) 249 return (error); 250 vp = NFSTOV(np); 251 if (v3 && (nmp->nm_state & NFSSTA_GOTFSINFO) == 0) 252 (void)nfs_fsinfo(nmp, vp, td->td_ucred, td); 253 nfsstats.rpccnt[NFSPROC_FSSTAT]++; 254 mreq = nfsm_reqhead(vp, NFSPROC_FSSTAT, NFSX_FH(v3)); 255 mb = mreq; 256 bpos = mtod(mb, caddr_t); 257 nfsm_fhtom(vp, v3); 258 nfsm_request(vp, NFSPROC_FSSTAT, td, td->td_ucred); 259 if (v3) 260 nfsm_postop_attr(vp, retattr); 261 if (error) { 262 if (mrep != NULL) 263 m_freem(mrep); 264 goto nfsmout; 265 } 266 sfp = nfsm_dissect(struct nfs_statfs *, NFSX_STATFS(v3)); 267 sbp->f_flags = nmp->nm_flag; 268 sbp->f_iosize = nfs_iosize(nmp); 269 if (v3) { 270 for (bsize = NFS_FABLKSIZE; ; bsize *= 2) { 271 sbp->f_bsize = bsize; 272 tquad = fxdr_hyper(&sfp->sf_tbytes); 273 if (((long)(tquad / bsize) > LONG_MAX) || 274 ((long)(tquad / bsize) < LONG_MIN)) 275 continue; 276 sbp->f_blocks = tquad / bsize; 277 tquad = fxdr_hyper(&sfp->sf_fbytes); 278 if (((long)(tquad / bsize) > LONG_MAX) || 279 ((long)(tquad / bsize) < LONG_MIN)) 280 continue; 281 sbp->f_bfree = tquad / bsize; 282 tquad = fxdr_hyper(&sfp->sf_abytes); 283 if (((long)(tquad / bsize) > LONG_MAX) || 284 ((long)(tquad / bsize) < LONG_MIN)) 285 continue; 286 sbp->f_bavail = tquad / bsize; 287 sbp->f_files = (fxdr_unsigned(int32_t, 288 sfp->sf_tfiles.nfsuquad[1]) & 0x7fffffff); 289 sbp->f_ffree = (fxdr_unsigned(int32_t, 290 sfp->sf_ffiles.nfsuquad[1]) & 0x7fffffff); 291 break; 292 } 293 } else { 294 sbp->f_bsize = fxdr_unsigned(int32_t, sfp->sf_bsize); 295 sbp->f_blocks = fxdr_unsigned(int32_t, sfp->sf_blocks); 296 sbp->f_bfree = fxdr_unsigned(int32_t, sfp->sf_bfree); 297 sbp->f_bavail = fxdr_unsigned(int32_t, sfp->sf_bavail); 298 sbp->f_files = 0; 299 sbp->f_ffree = 0; 300 } 301 if (sbp != &mp->mnt_stat) { 302 sbp->f_type = mp->mnt_vfc->vfc_typenum; 303 bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN); 304 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); 305 } 306 m_freem(mrep); 307 nfsmout: 308 vput(vp); 309 return (error); 310 } 311 312 /* 313 * nfs version 3 fsinfo rpc call 314 */ 315 int 316 nfs_fsinfo(struct nfsmount *nmp, struct vnode *vp, struct ucred *cred, 317 struct thread *td) 318 { 319 struct nfsv3_fsinfo *fsp; 320 u_int32_t pref, max; 321 caddr_t bpos, dpos; 322 int error = 0, retattr; 323 struct mbuf *mreq, *mrep, *md, *mb; 324 u_int64_t maxfsize; 325 326 nfsstats.rpccnt[NFSPROC_FSINFO]++; 327 mreq = nfsm_reqhead(vp, NFSPROC_FSINFO, NFSX_FH(1)); 328 mb = mreq; 329 bpos = mtod(mb, caddr_t); 330 nfsm_fhtom(vp, 1); 331 nfsm_request(vp, NFSPROC_FSINFO, td, cred); 332 nfsm_postop_attr(vp, retattr); 333 if (!error) { 334 fsp = nfsm_dissect(struct nfsv3_fsinfo *, NFSX_V3FSINFO); 335 pref = fxdr_unsigned(u_int32_t, fsp->fs_wtpref); 336 if (pref < nmp->nm_wsize && pref >= NFS_FABLKSIZE) 337 nmp->nm_wsize = (pref + NFS_FABLKSIZE - 1) & 338 ~(NFS_FABLKSIZE - 1); 339 max = fxdr_unsigned(u_int32_t, fsp->fs_wtmax); 340 if (max < nmp->nm_wsize && max > 0) { 341 nmp->nm_wsize = max & ~(NFS_FABLKSIZE - 1); 342 if (nmp->nm_wsize == 0) 343 nmp->nm_wsize = max; 344 } 345 pref = fxdr_unsigned(u_int32_t, fsp->fs_rtpref); 346 if (pref < nmp->nm_rsize && pref >= NFS_FABLKSIZE) 347 nmp->nm_rsize = (pref + NFS_FABLKSIZE - 1) & 348 ~(NFS_FABLKSIZE - 1); 349 max = fxdr_unsigned(u_int32_t, fsp->fs_rtmax); 350 if (max < nmp->nm_rsize && max > 0) { 351 nmp->nm_rsize = max & ~(NFS_FABLKSIZE - 1); 352 if (nmp->nm_rsize == 0) 353 nmp->nm_rsize = max; 354 } 355 pref = fxdr_unsigned(u_int32_t, fsp->fs_dtpref); 356 if (pref < nmp->nm_readdirsize && pref >= NFS_DIRBLKSIZ) 357 nmp->nm_readdirsize = (pref + NFS_DIRBLKSIZ - 1) & 358 ~(NFS_DIRBLKSIZ - 1); 359 if (max < nmp->nm_readdirsize && max > 0) { 360 nmp->nm_readdirsize = max & ~(NFS_DIRBLKSIZ - 1); 361 if (nmp->nm_readdirsize == 0) 362 nmp->nm_readdirsize = max; 363 } 364 maxfsize = fxdr_hyper(&fsp->fs_maxfilesize); 365 if (maxfsize > 0 && maxfsize < nmp->nm_maxfilesize) 366 nmp->nm_maxfilesize = maxfsize; 367 nmp->nm_mountp->mnt_stat.f_iosize = nfs_iosize(nmp); 368 nmp->nm_state |= NFSSTA_GOTFSINFO; 369 } 370 m_freem(mrep); 371 nfsmout: 372 return (error); 373 } 374 375 /* 376 * Mount a remote root fs via. nfs. This depends on the info in the 377 * nfs_diskless structure that has been filled in properly by some primary 378 * bootstrap. 379 * It goes something like this: 380 * - do enough of "ifconfig" by calling ifioctl() so that the system 381 * can talk to the server 382 * - If nfs_diskless.mygateway is filled in, use that address as 383 * a default gateway. 384 * - build the rootfs mount point and call mountnfs() to do the rest. 385 */ 386 int 387 nfs_mountroot(struct mount *mp, struct thread *td) 388 { 389 struct nfsv3_diskless *nd = &nfsv3_diskless; 390 struct socket *so; 391 struct vnode *vp; 392 int error, i; 393 u_long l; 394 char buf[128]; 395 396 GIANT_REQUIRED; /* XXX until socket locking done */ 397 398 #if defined(BOOTP_NFSROOT) && defined(BOOTP) 399 bootpc_init(); /* use bootp to get nfs_diskless filled in */ 400 #elif defined(NFS_ROOT) 401 nfs_setup_diskless(); 402 #endif 403 404 if (nfs_diskless_valid == 0) 405 return (-1); 406 if (nfs_diskless_valid == 1) 407 nfs_convert_diskless(); 408 409 /* 410 * XXX splnet, so networks will receive... 411 */ 412 splnet(); 413 414 /* 415 * Do enough of ifconfig(8) so that the critical net interface can 416 * talk to the server. 417 */ 418 error = socreate(nd->myif.ifra_addr.sa_family, &so, SOCK_DGRAM, 0, 419 td->td_ucred, td); 420 if (error) 421 panic("nfs_mountroot: socreate(%04x): %d", 422 nd->myif.ifra_addr.sa_family, error); 423 424 #if 0 /* XXX Bad idea */ 425 /* 426 * We might not have been told the right interface, so we pass 427 * over the first ten interfaces of the same kind, until we get 428 * one of them configured. 429 */ 430 431 for (i = strlen(nd->myif.ifra_name) - 1; 432 nd->myif.ifra_name[i] >= '' && 433 nd->myif.ifra_name[i] <= '9'; 434 nd->myif.ifra_name[i] ++) { 435 error = ifioctl(so, SIOCAIFADDR, (caddr_t)&nd->myif, td); 436 if(!error) 437 break; 438 } 439 #endif 440 error = ifioctl(so, SIOCAIFADDR, (caddr_t)&nd->myif, td); 441 if (error) 442 panic("nfs_mountroot: SIOCAIFADDR: %d", error); 443 soclose(so); 444 445 /* 446 * If the gateway field is filled in, set it as the default route. 447 * Note that pxeboot will set a default route of 0 if the route 448 * is not set by the DHCP server. Check also for a value of 0 449 * to avoid panicking inappropriately in that situation. 450 */ 451 if (nd->mygateway.sin_len != 0 && 452 nd->mygateway.sin_addr.s_addr != 0) { 453 struct sockaddr_in mask, sin; 454 455 bzero((caddr_t)&mask, sizeof(mask)); 456 sin = mask; 457 sin.sin_family = AF_INET; 458 sin.sin_len = sizeof(sin); 459 error = rtrequest(RTM_ADD, (struct sockaddr *)&sin, 460 (struct sockaddr *)&nd->mygateway, 461 (struct sockaddr *)&mask, 462 RTF_UP | RTF_GATEWAY, NULL); 463 if (error) 464 panic("nfs_mountroot: RTM_ADD: %d", error); 465 } 466 467 /* 468 * Create the rootfs mount point. 469 */ 470 nd->root_args.fh = nd->root_fh; 471 nd->root_args.fhsize = nd->root_fhsize; 472 l = ntohl(nd->root_saddr.sin_addr.s_addr); 473 snprintf(buf, sizeof(buf), "%ld.%ld.%ld.%ld:%s", 474 (l >> 24) & 0xff, (l >> 16) & 0xff, 475 (l >> 8) & 0xff, (l >> 0) & 0xff, nd->root_hostnam); 476 printf("NFS ROOT: %s\n", buf); 477 if ((error = nfs_mountdiskless(buf, "/", MNT_RDONLY, 478 &nd->root_saddr, &nd->root_args, td, &vp, mp)) != 0) { 479 return (error); 480 } 481 482 /* 483 * This is not really an nfs issue, but it is much easier to 484 * set hostname here and then let the "/etc/rc.xxx" files 485 * mount the right /var based upon its preset value. 486 */ 487 bcopy(nd->my_hostnam, hostname, MAXHOSTNAMELEN); 488 hostname[MAXHOSTNAMELEN - 1] = '\0'; 489 for (i = 0; i < MAXHOSTNAMELEN; i++) 490 if (hostname[i] == '\0') 491 break; 492 inittodr(ntohl(nd->root_time)); 493 return (0); 494 } 495 496 /* 497 * Internal version of mount system call for diskless setup. 498 */ 499 static int 500 nfs_mountdiskless(char *path, char *which, int mountflag, 501 struct sockaddr_in *sin, struct nfs_args *args, struct thread *td, 502 struct vnode **vpp, struct mount *mp) 503 { 504 struct sockaddr *nam; 505 int error; 506 507 mp->mnt_kern_flag = 0; 508 mp->mnt_flag = mountflag; 509 nam = sodupsockaddr((struct sockaddr *)sin, M_WAITOK); 510 if ((error = mountnfs(args, mp, nam, which, path, vpp, 511 td->td_ucred)) != 0) { 512 printf("nfs_mountroot: mount %s on %s: %d", path, which, error); 513 return (error); 514 } 515 (void) copystr(which, mp->mnt_stat.f_mntonname, MNAMELEN - 1, 0); 516 return (0); 517 } 518 519 static void 520 nfs_decode_args(struct nfsmount *nmp, struct nfs_args *argp) 521 { 522 int s; 523 int adjsock; 524 int maxio; 525 526 s = splnet(); 527 /* 528 * Silently clear NFSMNT_NOCONN if it's a TCP mount, it makes 529 * no sense in that context. 530 */ 531 if (argp->sotype == SOCK_STREAM) 532 nmp->nm_flag &= ~NFSMNT_NOCONN; 533 534 /* Also clear RDIRPLUS if not NFSv3, it crashes some servers */ 535 if ((argp->flags & NFSMNT_NFSV3) == 0) 536 nmp->nm_flag &= ~NFSMNT_RDIRPLUS; 537 538 /* Re-bind if rsrvd port requested and wasn't on one */ 539 adjsock = !(nmp->nm_flag & NFSMNT_RESVPORT) 540 && (argp->flags & NFSMNT_RESVPORT); 541 /* Also re-bind if we're switching to/from a connected UDP socket */ 542 adjsock |= ((nmp->nm_flag & NFSMNT_NOCONN) != 543 (argp->flags & NFSMNT_NOCONN)); 544 545 /* Update flags atomically. Don't change the lock bits. */ 546 nmp->nm_flag = argp->flags | nmp->nm_flag; 547 splx(s); 548 549 if ((argp->flags & NFSMNT_TIMEO) && argp->timeo > 0) { 550 nmp->nm_timeo = (argp->timeo * NFS_HZ + 5) / 10; 551 if (nmp->nm_timeo < NFS_MINTIMEO) 552 nmp->nm_timeo = NFS_MINTIMEO; 553 else if (nmp->nm_timeo > NFS_MAXTIMEO) 554 nmp->nm_timeo = NFS_MAXTIMEO; 555 } 556 557 if ((argp->flags & NFSMNT_RETRANS) && argp->retrans > 1) { 558 nmp->nm_retry = argp->retrans; 559 if (nmp->nm_retry > NFS_MAXREXMIT) 560 nmp->nm_retry = NFS_MAXREXMIT; 561 } 562 563 if (argp->flags & NFSMNT_NFSV3) { 564 if (argp->sotype == SOCK_DGRAM) 565 maxio = NFS_MAXDGRAMDATA; 566 else 567 maxio = NFS_MAXDATA; 568 } else 569 maxio = NFS_V2MAXDATA; 570 571 if ((argp->flags & NFSMNT_WSIZE) && argp->wsize > 0) { 572 nmp->nm_wsize = argp->wsize; 573 /* Round down to multiple of blocksize */ 574 nmp->nm_wsize &= ~(NFS_FABLKSIZE - 1); 575 if (nmp->nm_wsize <= 0) 576 nmp->nm_wsize = NFS_FABLKSIZE; 577 } 578 if (nmp->nm_wsize > maxio) 579 nmp->nm_wsize = maxio; 580 if (nmp->nm_wsize > MAXBSIZE) 581 nmp->nm_wsize = MAXBSIZE; 582 583 if ((argp->flags & NFSMNT_RSIZE) && argp->rsize > 0) { 584 nmp->nm_rsize = argp->rsize; 585 /* Round down to multiple of blocksize */ 586 nmp->nm_rsize &= ~(NFS_FABLKSIZE - 1); 587 if (nmp->nm_rsize <= 0) 588 nmp->nm_rsize = NFS_FABLKSIZE; 589 } 590 if (nmp->nm_rsize > maxio) 591 nmp->nm_rsize = maxio; 592 if (nmp->nm_rsize > MAXBSIZE) 593 nmp->nm_rsize = MAXBSIZE; 594 595 if ((argp->flags & NFSMNT_READDIRSIZE) && argp->readdirsize > 0) { 596 nmp->nm_readdirsize = argp->readdirsize; 597 } 598 if (nmp->nm_readdirsize > maxio) 599 nmp->nm_readdirsize = maxio; 600 if (nmp->nm_readdirsize > nmp->nm_rsize) 601 nmp->nm_readdirsize = nmp->nm_rsize; 602 603 if ((argp->flags & NFSMNT_ACREGMIN) && argp->acregmin >= 0) 604 nmp->nm_acregmin = argp->acregmin; 605 else 606 nmp->nm_acregmin = NFS_MINATTRTIMO; 607 if ((argp->flags & NFSMNT_ACREGMAX) && argp->acregmax >= 0) 608 nmp->nm_acregmax = argp->acregmax; 609 else 610 nmp->nm_acregmax = NFS_MAXATTRTIMO; 611 if ((argp->flags & NFSMNT_ACDIRMIN) && argp->acdirmin >= 0) 612 nmp->nm_acdirmin = argp->acdirmin; 613 else 614 nmp->nm_acdirmin = NFS_MINDIRATTRTIMO; 615 if ((argp->flags & NFSMNT_ACDIRMAX) && argp->acdirmax >= 0) 616 nmp->nm_acdirmax = argp->acdirmax; 617 else 618 nmp->nm_acdirmax = NFS_MAXDIRATTRTIMO; 619 if (nmp->nm_acdirmin > nmp->nm_acdirmax) 620 nmp->nm_acdirmin = nmp->nm_acdirmax; 621 if (nmp->nm_acregmin > nmp->nm_acregmax) 622 nmp->nm_acregmin = nmp->nm_acregmax; 623 624 if ((argp->flags & NFSMNT_MAXGRPS) && argp->maxgrouplist >= 0) { 625 if (argp->maxgrouplist <= NFS_MAXGRPS) 626 nmp->nm_numgrps = argp->maxgrouplist; 627 else 628 nmp->nm_numgrps = NFS_MAXGRPS; 629 } 630 if ((argp->flags & NFSMNT_READAHEAD) && argp->readahead >= 0) { 631 if (argp->readahead <= NFS_MAXRAHEAD) 632 nmp->nm_readahead = argp->readahead; 633 else 634 nmp->nm_readahead = NFS_MAXRAHEAD; 635 } 636 if ((argp->flags & NFSMNT_DEADTHRESH) && argp->deadthresh >= 0) { 637 if (argp->deadthresh <= NFS_MAXDEADTHRESH) 638 nmp->nm_deadthresh = argp->deadthresh; 639 else 640 nmp->nm_deadthresh = NFS_MAXDEADTHRESH; 641 } 642 643 adjsock |= ((nmp->nm_sotype != argp->sotype) || 644 (nmp->nm_soproto != argp->proto)); 645 nmp->nm_sotype = argp->sotype; 646 nmp->nm_soproto = argp->proto; 647 648 if (nmp->nm_so && adjsock) { 649 nfs_safedisconnect(nmp); 650 if (nmp->nm_sotype == SOCK_DGRAM) 651 while (nfs_connect(nmp, NULL)) { 652 printf("nfs_args: retrying connect\n"); 653 (void) tsleep((caddr_t)&lbolt, 654 PSOCK, "nfscon", 0); 655 } 656 } 657 } 658 659 /* 660 * VFS Operations. 661 * 662 * mount system call 663 * It seems a bit dumb to copyinstr() the host and path here and then 664 * bcopy() them in mountnfs(), but I wanted to detect errors before 665 * doing the sockargs() call because sockargs() allocates an mbuf and 666 * an error after that means that I have to release the mbuf. 667 */ 668 /* ARGSUSED */ 669 static int 670 nfs_omount(struct mount *mp, char *path, caddr_t data, struct thread *td) 671 { 672 int error; 673 struct nfs_args args; 674 struct sockaddr *nam; 675 struct vnode *vp; 676 char hst[MNAMELEN]; 677 size_t len; 678 u_char nfh[NFSX_V3FHMAX]; 679 680 if (path == NULL) 681 return (nfs_mountroot(mp, td)); 682 error = copyin(data, (caddr_t)&args, sizeof (struct nfs_args)); 683 if (error) 684 return (error); 685 if (args.version != NFS_ARGSVERSION) { 686 #ifdef COMPAT_PRELITE2 687 /* 688 * If the argument version is unknown, then assume the 689 * caller is a pre-lite2 4.4BSD client and convert its 690 * arguments. 691 */ 692 struct onfs_args oargs; 693 error = copyin(data, (caddr_t)&oargs, sizeof (struct onfs_args)); 694 if (error) 695 return (error); 696 nfs_convert_oargs(&args,&oargs); 697 #else /* !COMPAT_PRELITE2 */ 698 return (EPROGMISMATCH); 699 #endif /* COMPAT_PRELITE2 */ 700 } 701 if (mp->mnt_flag & MNT_UPDATE) { 702 struct nfsmount *nmp = VFSTONFS(mp); 703 704 if (nmp == NULL) 705 return (EIO); 706 /* 707 * When doing an update, we can't change from or to 708 * v3, switch lockd strategies or change cookie translation 709 */ 710 args.flags = (args.flags & 711 ~(NFSMNT_NFSV3 | NFSMNT_NOLOCKD /*|NFSMNT_XLATECOOKIE*/)) | 712 (nmp->nm_flag & 713 (NFSMNT_NFSV3 | NFSMNT_NOLOCKD /*|NFSMNT_XLATECOOKIE*/)); 714 nfs_decode_args(nmp, &args); 715 return (0); 716 } 717 718 /* 719 * Make the nfs_ip_paranoia sysctl serve as the default connection 720 * or no-connection mode for those protocols that support 721 * no-connection mode (the flag will be cleared later for protocols 722 * that do not support no-connection mode). This will allow a client 723 * to receive replies from a different IP then the request was 724 * sent to. Note: default value for nfs_ip_paranoia is 1 (paranoid), 725 * not 0. 726 */ 727 if (nfs_ip_paranoia == 0) 728 args.flags |= NFSMNT_NOCONN; 729 if (args.fhsize < 0 || args.fhsize > NFSX_V3FHMAX) 730 return (EINVAL); 731 error = copyin((caddr_t)args.fh, (caddr_t)nfh, args.fhsize); 732 if (error) 733 return (error); 734 error = copyinstr(args.hostname, hst, MNAMELEN-1, &len); 735 if (error) 736 return (error); 737 bzero(&hst[len], MNAMELEN - len); 738 /* sockargs() call must be after above copyin() calls */ 739 error = getsockaddr(&nam, (caddr_t)args.addr, args.addrlen); 740 if (error) 741 return (error); 742 args.fh = nfh; 743 error = mountnfs(&args, mp, nam, path, hst, &vp, td->td_ucred); 744 return (error); 745 } 746 747 /* 748 * Common code for mount and mountroot 749 */ 750 static int 751 mountnfs(struct nfs_args *argp, struct mount *mp, struct sockaddr *nam, 752 char *pth, char *hst, struct vnode **vpp, struct ucred *cred) 753 { 754 struct nfsmount *nmp; 755 struct nfsnode *np; 756 int error; 757 struct vattr attrs; 758 759 if (mp->mnt_flag & MNT_UPDATE) { 760 nmp = VFSTONFS(mp); 761 /* update paths, file handles, etc, here XXX */ 762 FREE(nam, M_SONAME); 763 return (0); 764 } else { 765 nmp = uma_zalloc(nfsmount_zone, M_WAITOK); 766 bzero((caddr_t)nmp, sizeof (struct nfsmount)); 767 TAILQ_INIT(&nmp->nm_bufq); 768 mp->mnt_data = (qaddr_t)nmp; 769 } 770 vfs_getnewfsid(mp); 771 nmp->nm_mountp = mp; 772 773 /* 774 * V2 can only handle 32 bit filesizes. A 4GB-1 limit may be too 775 * high, depending on whether we end up with negative offsets in 776 * the client or server somewhere. 2GB-1 may be safer. 777 * 778 * For V3, nfs_fsinfo will adjust this as necessary. Assume maximum 779 * that we can handle until we find out otherwise. 780 * XXX Our "safe" limit on the client is what we can store in our 781 * buffer cache using signed(!) block numbers. 782 */ 783 if ((argp->flags & NFSMNT_NFSV3) == 0) 784 nmp->nm_maxfilesize = 0xffffffffLL; 785 else 786 nmp->nm_maxfilesize = (u_int64_t)0x80000000 * DEV_BSIZE - 1; 787 788 nmp->nm_timeo = NFS_TIMEO; 789 nmp->nm_retry = NFS_RETRANS; 790 if ((argp->flags & NFSMNT_NFSV3) && argp->sotype == SOCK_STREAM) { 791 nmp->nm_wsize = nmp->nm_rsize = NFS_MAXDATA; 792 } else { 793 nmp->nm_wsize = NFS_WSIZE; 794 nmp->nm_rsize = NFS_RSIZE; 795 } 796 nmp->nm_readdirsize = NFS_READDIRSIZE; 797 nmp->nm_numgrps = NFS_MAXGRPS; 798 nmp->nm_readahead = NFS_DEFRAHEAD; 799 nmp->nm_deadthresh = NFS_MAXDEADTHRESH; 800 nmp->nm_tprintf_delay = nfs_tprintf_delay; 801 if (nmp->nm_tprintf_delay < 0) 802 nmp->nm_tprintf_delay = 0; 803 nmp->nm_tprintf_initial_delay = nfs_tprintf_initial_delay; 804 if (nmp->nm_tprintf_initial_delay < 0) 805 nmp->nm_tprintf_initial_delay = 0; 806 nmp->nm_fhsize = argp->fhsize; 807 bcopy((caddr_t)argp->fh, (caddr_t)nmp->nm_fh, argp->fhsize); 808 bcopy(hst, mp->mnt_stat.f_mntfromname, MNAMELEN); 809 bcopy(pth, mp->mnt_stat.f_mntonname, MNAMELEN); 810 nmp->nm_nam = nam; 811 /* Set up the sockets and per-host congestion */ 812 nmp->nm_sotype = argp->sotype; 813 nmp->nm_soproto = argp->proto; 814 nmp->nm_rpcops = &nfs_rpcops; 815 816 nfs_decode_args(nmp, argp); 817 818 /* 819 * For Connection based sockets (TCP,...) defer the connect until 820 * the first request, in case the server is not responding. 821 */ 822 if (nmp->nm_sotype == SOCK_DGRAM && 823 (error = nfs_connect(nmp, NULL))) 824 goto bad; 825 826 /* 827 * This is silly, but it has to be set so that vinifod() works. 828 * We do not want to do an nfs_statfs() here since we can get 829 * stuck on a dead server and we are holding a lock on the mount 830 * point. 831 */ 832 mp->mnt_stat.f_iosize = nfs_iosize(nmp); 833 /* 834 * A reference count is needed on the nfsnode representing the 835 * remote root. If this object is not persistent, then backward 836 * traversals of the mount point (i.e. "..") will not work if 837 * the nfsnode gets flushed out of the cache. Ufs does not have 838 * this problem, because one can identify root inodes by their 839 * number == ROOTINO (2). 840 */ 841 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np); 842 if (error) 843 goto bad; 844 *vpp = NFSTOV(np); 845 846 /* 847 * Get file attributes and transfer parameters for the 848 * mountpoint. This has the side effect of filling in 849 * (*vpp)->v_type with the correct value. 850 */ 851 if (argp->flags & NFSMNT_NFSV3) 852 nfs_fsinfo(nmp, *vpp, curthread->td_ucred, curthread); 853 else 854 VOP_GETATTR(*vpp, &attrs, curthread->td_ucred, curthread); 855 856 /* 857 * Lose the lock but keep the ref. 858 */ 859 VOP_UNLOCK(*vpp, 0, curthread); 860 861 return (0); 862 bad: 863 nfs_disconnect(nmp); 864 uma_zfree(nfsmount_zone, nmp); 865 FREE(nam, M_SONAME); 866 return (error); 867 } 868 869 /* 870 * unmount system call 871 */ 872 static int 873 nfs_unmount(struct mount *mp, int mntflags, struct thread *td) 874 { 875 struct nfsmount *nmp; 876 int error, flags = 0; 877 878 if (mntflags & MNT_FORCE) 879 flags |= FORCECLOSE; 880 nmp = VFSTONFS(mp); 881 /* 882 * Goes something like this.. 883 * - Call vflush() to clear out vnodes for this filesystem 884 * - Close the socket 885 * - Free up the data structures 886 */ 887 /* In the forced case, cancel any outstanding requests. */ 888 if (flags & FORCECLOSE) { 889 error = nfs_nmcancelreqs(nmp); 890 if (error) 891 return (error); 892 } 893 /* We hold 1 extra ref on the root vnode; see comment in mountnfs(). */ 894 error = vflush(mp, 1, flags, td); 895 if (error) 896 return (error); 897 898 /* 899 * We are now committed to the unmount. 900 */ 901 nfs_disconnect(nmp); 902 FREE(nmp->nm_nam, M_SONAME); 903 904 uma_zfree(nfsmount_zone, nmp); 905 return (0); 906 } 907 908 /* 909 * Return root of a filesystem 910 */ 911 static int 912 nfs_root(struct mount *mp, struct vnode **vpp, struct thread *td) 913 { 914 struct vnode *vp; 915 struct nfsmount *nmp; 916 struct nfsnode *np; 917 int error; 918 919 nmp = VFSTONFS(mp); 920 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np); 921 if (error) 922 return (error); 923 vp = NFSTOV(np); 924 /* 925 * Get transfer parameters and attributes for root vnode once. 926 */ 927 if ((nmp->nm_state & NFSSTA_GOTFSINFO) == 0 && 928 (nmp->nm_flag & NFSMNT_NFSV3)) { 929 nfs_fsinfo(nmp, vp, curthread->td_ucred, curthread); 930 } 931 if (vp->v_type == VNON) 932 vp->v_type = VDIR; 933 vp->v_vflag |= VV_ROOT; 934 *vpp = vp; 935 return (0); 936 } 937 938 /* 939 * Flush out the buffer cache 940 */ 941 /* ARGSUSED */ 942 static int 943 nfs_sync(struct mount *mp, int waitfor, struct ucred *cred, struct thread *td) 944 { 945 struct vnode *vp, *nvp; 946 int error, allerror = 0; 947 948 /* 949 * Force stale buffer cache information to be flushed. 950 */ 951 MNT_ILOCK(mp); 952 loop: 953 MNT_VNODE_FOREACH(vp, mp, nvp) { 954 VI_LOCK(vp); 955 MNT_IUNLOCK(mp); 956 if (VOP_ISLOCKED(vp, NULL) || TAILQ_EMPTY(&vp->v_dirtyblkhd) || 957 waitfor == MNT_LAZY) { 958 VI_UNLOCK(vp); 959 MNT_ILOCK(mp); 960 continue; 961 } 962 if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK, td)) { 963 MNT_ILOCK(mp); 964 goto loop; 965 } 966 error = VOP_FSYNC(vp, cred, waitfor, td); 967 if (error) 968 allerror = error; 969 VOP_UNLOCK(vp, 0, td); 970 vrele(vp); 971 972 MNT_ILOCK(mp); 973 } 974 MNT_IUNLOCK(mp); 975 return (allerror); 976 } 977 978 static int 979 nfs_sysctl(struct mount *mp, fsctlop_t op, struct sysctl_req *req) 980 { 981 struct nfsmount *nmp = VFSTONFS(mp); 982 struct vfsquery vq; 983 int error; 984 985 bzero(&vq, sizeof(vq)); 986 switch (op) { 987 #if 0 988 case VFS_CTL_NOLOCKS: 989 val = (nmp->nm_flag & NFSMNT_NOLOCKS) ? 1 : 0; 990 if (req->oldptr != NULL) { 991 error = SYSCTL_OUT(req, &val, sizeof(val)); 992 if (error) 993 return (error); 994 } 995 if (req->newptr != NULL) { 996 error = SYSCTL_IN(req, &val, sizeof(val)); 997 if (error) 998 return (error); 999 if (val) 1000 nmp->nm_flag |= NFSMNT_NOLOCKS; 1001 else 1002 nmp->nm_flag &= ~NFSMNT_NOLOCKS; 1003 } 1004 break; 1005 #endif 1006 case VFS_CTL_QUERY: 1007 if (nmp->nm_state & NFSSTA_TIMEO) 1008 vq.vq_flags |= VQ_NOTRESP; 1009 #if 0 1010 if (!(nmp->nm_flag & NFSMNT_NOLOCKS) && 1011 (nmp->nm_state & NFSSTA_LOCKTIMEO)) 1012 vq.vq_flags |= VQ_NOTRESPLOCK; 1013 #endif 1014 error = SYSCTL_OUT(req, &vq, sizeof(vq)); 1015 break; 1016 case VFS_CTL_TIMEO: 1017 if (req->oldptr != NULL) { 1018 error = SYSCTL_OUT(req, &nmp->nm_tprintf_initial_delay, 1019 sizeof(nmp->nm_tprintf_initial_delay)); 1020 if (error) 1021 return (error); 1022 } 1023 if (req->newptr != NULL) { 1024 error = vfs_suser(mp, req->td); 1025 if (error) 1026 return (error); 1027 error = SYSCTL_IN(req, &nmp->nm_tprintf_initial_delay, 1028 sizeof(nmp->nm_tprintf_initial_delay)); 1029 if (error) 1030 return (error); 1031 if (nmp->nm_tprintf_initial_delay < 0) 1032 nmp->nm_tprintf_initial_delay = 0; 1033 } 1034 break; 1035 default: 1036 return (ENOTSUP); 1037 } 1038 return (0); 1039 }
Cache object: 3384cb542f20740f356ee5edc3430134
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