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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/5.4/sys/nfsclient/nfs_vfsops.c 141090 2005-01-31 23:27:04Z imp $"); 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; 242 243 #ifndef nolint 244 sfp = NULL; 245 #endif 246 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np); 247 if (error) 248 return (error); 249 vp = NFSTOV(np); 250 if (v3 && (nmp->nm_state & NFSSTA_GOTFSINFO) == 0) 251 (void)nfs_fsinfo(nmp, vp, td->td_ucred, td); 252 nfsstats.rpccnt[NFSPROC_FSSTAT]++; 253 mreq = nfsm_reqhead(vp, NFSPROC_FSSTAT, NFSX_FH(v3)); 254 mb = mreq; 255 bpos = mtod(mb, caddr_t); 256 nfsm_fhtom(vp, v3); 257 nfsm_request(vp, NFSPROC_FSSTAT, td, td->td_ucred); 258 if (v3) 259 nfsm_postop_attr(vp, retattr); 260 if (error) { 261 if (mrep != NULL) 262 m_freem(mrep); 263 goto nfsmout; 264 } 265 sfp = nfsm_dissect(struct nfs_statfs *, NFSX_STATFS(v3)); 266 sbp->f_flags = nmp->nm_flag; 267 sbp->f_iosize = nfs_iosize(nmp); 268 if (v3) { 269 sbp->f_bsize = NFS_FABLKSIZE; 270 tquad = fxdr_hyper(&sfp->sf_tbytes); 271 sbp->f_blocks = tquad / NFS_FABLKSIZE; 272 tquad = fxdr_hyper(&sfp->sf_fbytes); 273 sbp->f_bfree = tquad / NFS_FABLKSIZE; 274 tquad = fxdr_hyper(&sfp->sf_abytes); 275 sbp->f_bavail = tquad / NFS_FABLKSIZE; 276 sbp->f_files = (fxdr_unsigned(int32_t, 277 sfp->sf_tfiles.nfsuquad[1]) & 0x7fffffff); 278 sbp->f_ffree = (fxdr_unsigned(int32_t, 279 sfp->sf_ffiles.nfsuquad[1]) & 0x7fffffff); 280 } else { 281 sbp->f_bsize = fxdr_unsigned(int32_t, sfp->sf_bsize); 282 sbp->f_blocks = fxdr_unsigned(int32_t, sfp->sf_blocks); 283 sbp->f_bfree = fxdr_unsigned(int32_t, sfp->sf_bfree); 284 sbp->f_bavail = fxdr_unsigned(int32_t, sfp->sf_bavail); 285 sbp->f_files = 0; 286 sbp->f_ffree = 0; 287 } 288 if (sbp != &mp->mnt_stat) { 289 sbp->f_type = mp->mnt_vfc->vfc_typenum; 290 bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN); 291 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); 292 } 293 m_freem(mrep); 294 nfsmout: 295 vput(vp); 296 return (error); 297 } 298 299 /* 300 * nfs version 3 fsinfo rpc call 301 */ 302 int 303 nfs_fsinfo(struct nfsmount *nmp, struct vnode *vp, struct ucred *cred, 304 struct thread *td) 305 { 306 struct nfsv3_fsinfo *fsp; 307 u_int32_t pref, max; 308 caddr_t bpos, dpos; 309 int error = 0, retattr; 310 struct mbuf *mreq, *mrep, *md, *mb; 311 u_int64_t maxfsize; 312 313 nfsstats.rpccnt[NFSPROC_FSINFO]++; 314 mreq = nfsm_reqhead(vp, NFSPROC_FSINFO, NFSX_FH(1)); 315 mb = mreq; 316 bpos = mtod(mb, caddr_t); 317 nfsm_fhtom(vp, 1); 318 nfsm_request(vp, NFSPROC_FSINFO, td, cred); 319 nfsm_postop_attr(vp, retattr); 320 if (!error) { 321 fsp = nfsm_dissect(struct nfsv3_fsinfo *, NFSX_V3FSINFO); 322 pref = fxdr_unsigned(u_int32_t, fsp->fs_wtpref); 323 if (pref < nmp->nm_wsize && pref >= NFS_FABLKSIZE) 324 nmp->nm_wsize = (pref + NFS_FABLKSIZE - 1) & 325 ~(NFS_FABLKSIZE - 1); 326 max = fxdr_unsigned(u_int32_t, fsp->fs_wtmax); 327 if (max < nmp->nm_wsize && max > 0) { 328 nmp->nm_wsize = max & ~(NFS_FABLKSIZE - 1); 329 if (nmp->nm_wsize == 0) 330 nmp->nm_wsize = max; 331 } 332 pref = fxdr_unsigned(u_int32_t, fsp->fs_rtpref); 333 if (pref < nmp->nm_rsize && pref >= NFS_FABLKSIZE) 334 nmp->nm_rsize = (pref + NFS_FABLKSIZE - 1) & 335 ~(NFS_FABLKSIZE - 1); 336 max = fxdr_unsigned(u_int32_t, fsp->fs_rtmax); 337 if (max < nmp->nm_rsize && max > 0) { 338 nmp->nm_rsize = max & ~(NFS_FABLKSIZE - 1); 339 if (nmp->nm_rsize == 0) 340 nmp->nm_rsize = max; 341 } 342 pref = fxdr_unsigned(u_int32_t, fsp->fs_dtpref); 343 if (pref < nmp->nm_readdirsize && pref >= NFS_DIRBLKSIZ) 344 nmp->nm_readdirsize = (pref + NFS_DIRBLKSIZ - 1) & 345 ~(NFS_DIRBLKSIZ - 1); 346 if (max < nmp->nm_readdirsize && max > 0) { 347 nmp->nm_readdirsize = max & ~(NFS_DIRBLKSIZ - 1); 348 if (nmp->nm_readdirsize == 0) 349 nmp->nm_readdirsize = max; 350 } 351 maxfsize = fxdr_hyper(&fsp->fs_maxfilesize); 352 if (maxfsize > 0 && maxfsize < nmp->nm_maxfilesize) 353 nmp->nm_maxfilesize = maxfsize; 354 nmp->nm_mountp->mnt_stat.f_iosize = nfs_iosize(nmp); 355 nmp->nm_state |= NFSSTA_GOTFSINFO; 356 } 357 m_freem(mrep); 358 nfsmout: 359 return (error); 360 } 361 362 /* 363 * Mount a remote root fs via. nfs. This depends on the info in the 364 * nfs_diskless structure that has been filled in properly by some primary 365 * bootstrap. 366 * It goes something like this: 367 * - do enough of "ifconfig" by calling ifioctl() so that the system 368 * can talk to the server 369 * - If nfs_diskless.mygateway is filled in, use that address as 370 * a default gateway. 371 * - build the rootfs mount point and call mountnfs() to do the rest. 372 * 373 * It is assumed to be safe to read, modify, and write the nfsv3_diskless 374 * structure, as well as other global NFS client variables here, as 375 * nfs_mountroot() will be called once in the boot before any other NFS 376 * client activity occurs. 377 */ 378 int 379 nfs_mountroot(struct mount *mp, struct thread *td) 380 { 381 struct nfsv3_diskless *nd = &nfsv3_diskless; 382 struct socket *so; 383 struct vnode *vp; 384 int error, i; 385 u_long l; 386 char buf[128]; 387 388 NET_ASSERT_GIANT(); 389 390 #if defined(BOOTP_NFSROOT) && defined(BOOTP) 391 bootpc_init(); /* use bootp to get nfs_diskless filled in */ 392 #elif defined(NFS_ROOT) 393 nfs_setup_diskless(); 394 #endif 395 396 if (nfs_diskless_valid == 0) 397 return (-1); 398 if (nfs_diskless_valid == 1) 399 nfs_convert_diskless(); 400 401 /* 402 * XXX splnet, so networks will receive... 403 */ 404 splnet(); 405 406 /* 407 * Do enough of ifconfig(8) so that the critical net interface can 408 * talk to the server. 409 */ 410 error = socreate(nd->myif.ifra_addr.sa_family, &so, SOCK_DGRAM, 0, 411 td->td_ucred, td); 412 if (error) 413 panic("nfs_mountroot: socreate(%04x): %d", 414 nd->myif.ifra_addr.sa_family, error); 415 416 #if 0 /* XXX Bad idea */ 417 /* 418 * We might not have been told the right interface, so we pass 419 * over the first ten interfaces of the same kind, until we get 420 * one of them configured. 421 */ 422 423 for (i = strlen(nd->myif.ifra_name) - 1; 424 nd->myif.ifra_name[i] >= '' && 425 nd->myif.ifra_name[i] <= '9'; 426 nd->myif.ifra_name[i] ++) { 427 error = ifioctl(so, SIOCAIFADDR, (caddr_t)&nd->myif, td); 428 if(!error) 429 break; 430 } 431 #endif 432 error = ifioctl(so, SIOCAIFADDR, (caddr_t)&nd->myif, td); 433 if (error) 434 panic("nfs_mountroot: SIOCAIFADDR: %d", error); 435 soclose(so); 436 437 /* 438 * If the gateway field is filled in, set it as the default route. 439 * Note that pxeboot will set a default route of 0 if the route 440 * is not set by the DHCP server. Check also for a value of 0 441 * to avoid panicking inappropriately in that situation. 442 */ 443 if (nd->mygateway.sin_len != 0 && 444 nd->mygateway.sin_addr.s_addr != 0) { 445 struct sockaddr_in mask, sin; 446 447 bzero((caddr_t)&mask, sizeof(mask)); 448 sin = mask; 449 sin.sin_family = AF_INET; 450 sin.sin_len = sizeof(sin); 451 error = rtrequest(RTM_ADD, (struct sockaddr *)&sin, 452 (struct sockaddr *)&nd->mygateway, 453 (struct sockaddr *)&mask, 454 RTF_UP | RTF_GATEWAY, NULL); 455 if (error) 456 panic("nfs_mountroot: RTM_ADD: %d", error); 457 } 458 459 /* 460 * Create the rootfs mount point. 461 */ 462 nd->root_args.fh = nd->root_fh; 463 nd->root_args.fhsize = nd->root_fhsize; 464 l = ntohl(nd->root_saddr.sin_addr.s_addr); 465 snprintf(buf, sizeof(buf), "%ld.%ld.%ld.%ld:%s", 466 (l >> 24) & 0xff, (l >> 16) & 0xff, 467 (l >> 8) & 0xff, (l >> 0) & 0xff, nd->root_hostnam); 468 printf("NFS ROOT: %s\n", buf); 469 if ((error = nfs_mountdiskless(buf, "/", MNT_RDONLY, 470 &nd->root_saddr, &nd->root_args, td, &vp, mp)) != 0) { 471 return (error); 472 } 473 474 /* 475 * This is not really an nfs issue, but it is much easier to 476 * set hostname here and then let the "/etc/rc.xxx" files 477 * mount the right /var based upon its preset value. 478 */ 479 bcopy(nd->my_hostnam, hostname, MAXHOSTNAMELEN); 480 hostname[MAXHOSTNAMELEN - 1] = '\0'; 481 for (i = 0; i < MAXHOSTNAMELEN; i++) 482 if (hostname[i] == '\0') 483 break; 484 inittodr(ntohl(nd->root_time)); 485 return (0); 486 } 487 488 /* 489 * Internal version of mount system call for diskless setup. 490 */ 491 static int 492 nfs_mountdiskless(char *path, char *which, int mountflag, 493 struct sockaddr_in *sin, struct nfs_args *args, struct thread *td, 494 struct vnode **vpp, struct mount *mp) 495 { 496 struct sockaddr *nam; 497 int error; 498 499 mp->mnt_kern_flag = 0; 500 mp->mnt_flag = mountflag; 501 nam = sodupsockaddr((struct sockaddr *)sin, M_WAITOK); 502 if ((error = mountnfs(args, mp, nam, which, path, vpp, 503 td->td_ucred)) != 0) { 504 printf("nfs_mountroot: mount %s on %s: %d", path, which, error); 505 return (error); 506 } 507 (void) copystr(which, mp->mnt_stat.f_mntonname, MNAMELEN - 1, 0); 508 return (0); 509 } 510 511 static void 512 nfs_decode_args(struct nfsmount *nmp, struct nfs_args *argp) 513 { 514 int s; 515 int adjsock; 516 int maxio; 517 518 s = splnet(); 519 /* 520 * Silently clear NFSMNT_NOCONN if it's a TCP mount, it makes 521 * no sense in that context. 522 */ 523 if (argp->sotype == SOCK_STREAM) 524 nmp->nm_flag &= ~NFSMNT_NOCONN; 525 526 /* Also clear RDIRPLUS if not NFSv3, it crashes some servers */ 527 if ((argp->flags & NFSMNT_NFSV3) == 0) 528 nmp->nm_flag &= ~NFSMNT_RDIRPLUS; 529 530 /* Re-bind if rsrvd port requested and wasn't on one */ 531 adjsock = !(nmp->nm_flag & NFSMNT_RESVPORT) 532 && (argp->flags & NFSMNT_RESVPORT); 533 /* Also re-bind if we're switching to/from a connected UDP socket */ 534 adjsock |= ((nmp->nm_flag & NFSMNT_NOCONN) != 535 (argp->flags & NFSMNT_NOCONN)); 536 537 /* Update flags atomically. Don't change the lock bits. */ 538 nmp->nm_flag = argp->flags | nmp->nm_flag; 539 splx(s); 540 541 if ((argp->flags & NFSMNT_TIMEO) && argp->timeo > 0) { 542 nmp->nm_timeo = (argp->timeo * NFS_HZ + 5) / 10; 543 if (nmp->nm_timeo < NFS_MINTIMEO) 544 nmp->nm_timeo = NFS_MINTIMEO; 545 else if (nmp->nm_timeo > NFS_MAXTIMEO) 546 nmp->nm_timeo = NFS_MAXTIMEO; 547 } 548 549 if ((argp->flags & NFSMNT_RETRANS) && argp->retrans > 1) { 550 nmp->nm_retry = argp->retrans; 551 if (nmp->nm_retry > NFS_MAXREXMIT) 552 nmp->nm_retry = NFS_MAXREXMIT; 553 } 554 555 if (argp->flags & NFSMNT_NFSV3) { 556 if (argp->sotype == SOCK_DGRAM) 557 maxio = NFS_MAXDGRAMDATA; 558 else 559 maxio = NFS_MAXDATA; 560 } else 561 maxio = NFS_V2MAXDATA; 562 563 if ((argp->flags & NFSMNT_WSIZE) && argp->wsize > 0) { 564 nmp->nm_wsize = argp->wsize; 565 /* Round down to multiple of blocksize */ 566 nmp->nm_wsize &= ~(NFS_FABLKSIZE - 1); 567 if (nmp->nm_wsize <= 0) 568 nmp->nm_wsize = NFS_FABLKSIZE; 569 } 570 if (nmp->nm_wsize > maxio) 571 nmp->nm_wsize = maxio; 572 if (nmp->nm_wsize > MAXBSIZE) 573 nmp->nm_wsize = MAXBSIZE; 574 575 if ((argp->flags & NFSMNT_RSIZE) && argp->rsize > 0) { 576 nmp->nm_rsize = argp->rsize; 577 /* Round down to multiple of blocksize */ 578 nmp->nm_rsize &= ~(NFS_FABLKSIZE - 1); 579 if (nmp->nm_rsize <= 0) 580 nmp->nm_rsize = NFS_FABLKSIZE; 581 } 582 if (nmp->nm_rsize > maxio) 583 nmp->nm_rsize = maxio; 584 if (nmp->nm_rsize > MAXBSIZE) 585 nmp->nm_rsize = MAXBSIZE; 586 587 if ((argp->flags & NFSMNT_READDIRSIZE) && argp->readdirsize > 0) { 588 nmp->nm_readdirsize = argp->readdirsize; 589 } 590 if (nmp->nm_readdirsize > maxio) 591 nmp->nm_readdirsize = maxio; 592 if (nmp->nm_readdirsize > nmp->nm_rsize) 593 nmp->nm_readdirsize = nmp->nm_rsize; 594 595 if ((argp->flags & NFSMNT_ACREGMIN) && argp->acregmin >= 0) 596 nmp->nm_acregmin = argp->acregmin; 597 else 598 nmp->nm_acregmin = NFS_MINATTRTIMO; 599 if ((argp->flags & NFSMNT_ACREGMAX) && argp->acregmax >= 0) 600 nmp->nm_acregmax = argp->acregmax; 601 else 602 nmp->nm_acregmax = NFS_MAXATTRTIMO; 603 if ((argp->flags & NFSMNT_ACDIRMIN) && argp->acdirmin >= 0) 604 nmp->nm_acdirmin = argp->acdirmin; 605 else 606 nmp->nm_acdirmin = NFS_MINDIRATTRTIMO; 607 if ((argp->flags & NFSMNT_ACDIRMAX) && argp->acdirmax >= 0) 608 nmp->nm_acdirmax = argp->acdirmax; 609 else 610 nmp->nm_acdirmax = NFS_MAXDIRATTRTIMO; 611 if (nmp->nm_acdirmin > nmp->nm_acdirmax) 612 nmp->nm_acdirmin = nmp->nm_acdirmax; 613 if (nmp->nm_acregmin > nmp->nm_acregmax) 614 nmp->nm_acregmin = nmp->nm_acregmax; 615 616 if ((argp->flags & NFSMNT_MAXGRPS) && argp->maxgrouplist >= 0) { 617 if (argp->maxgrouplist <= NFS_MAXGRPS) 618 nmp->nm_numgrps = argp->maxgrouplist; 619 else 620 nmp->nm_numgrps = NFS_MAXGRPS; 621 } 622 if ((argp->flags & NFSMNT_READAHEAD) && argp->readahead >= 0) { 623 if (argp->readahead <= NFS_MAXRAHEAD) 624 nmp->nm_readahead = argp->readahead; 625 else 626 nmp->nm_readahead = NFS_MAXRAHEAD; 627 } 628 if ((argp->flags & NFSMNT_DEADTHRESH) && argp->deadthresh >= 0) { 629 if (argp->deadthresh <= NFS_MAXDEADTHRESH) 630 nmp->nm_deadthresh = argp->deadthresh; 631 else 632 nmp->nm_deadthresh = NFS_MAXDEADTHRESH; 633 } 634 635 adjsock |= ((nmp->nm_sotype != argp->sotype) || 636 (nmp->nm_soproto != argp->proto)); 637 nmp->nm_sotype = argp->sotype; 638 nmp->nm_soproto = argp->proto; 639 640 if (nmp->nm_so && adjsock) { 641 nfs_safedisconnect(nmp); 642 if (nmp->nm_sotype == SOCK_DGRAM) 643 while (nfs_connect(nmp, NULL)) { 644 printf("nfs_args: retrying connect\n"); 645 (void) tsleep((caddr_t)&lbolt, 646 PSOCK, "nfscon", 0); 647 } 648 } 649 } 650 651 /* 652 * VFS Operations. 653 * 654 * mount system call 655 * It seems a bit dumb to copyinstr() the host and path here and then 656 * bcopy() them in mountnfs(), but I wanted to detect errors before 657 * doing the sockargs() call because sockargs() allocates an mbuf and 658 * an error after that means that I have to release the mbuf. 659 */ 660 /* ARGSUSED */ 661 static int 662 nfs_omount(struct mount *mp, char *path, caddr_t data, struct thread *td) 663 { 664 int error; 665 struct nfs_args args; 666 struct sockaddr *nam; 667 struct vnode *vp; 668 char hst[MNAMELEN]; 669 size_t len; 670 u_char nfh[NFSX_V3FHMAX]; 671 672 if (path == NULL) 673 return (nfs_mountroot(mp, td)); 674 error = copyin(data, (caddr_t)&args, sizeof (struct nfs_args)); 675 if (error) 676 return (error); 677 if (args.version != NFS_ARGSVERSION) { 678 #ifdef COMPAT_PRELITE2 679 /* 680 * If the argument version is unknown, then assume the 681 * caller is a pre-lite2 4.4BSD client and convert its 682 * arguments. 683 */ 684 struct onfs_args oargs; 685 error = copyin(data, (caddr_t)&oargs, sizeof (struct onfs_args)); 686 if (error) 687 return (error); 688 nfs_convert_oargs(&args,&oargs); 689 #else /* !COMPAT_PRELITE2 */ 690 return (EPROGMISMATCH); 691 #endif /* COMPAT_PRELITE2 */ 692 } 693 if (mp->mnt_flag & MNT_UPDATE) { 694 struct nfsmount *nmp = VFSTONFS(mp); 695 696 if (nmp == NULL) 697 return (EIO); 698 /* 699 * When doing an update, we can't change from or to 700 * v3, switch lockd strategies or change cookie translation 701 */ 702 args.flags = (args.flags & 703 ~(NFSMNT_NFSV3 | NFSMNT_NOLOCKD /*|NFSMNT_XLATECOOKIE*/)) | 704 (nmp->nm_flag & 705 (NFSMNT_NFSV3 | NFSMNT_NOLOCKD /*|NFSMNT_XLATECOOKIE*/)); 706 nfs_decode_args(nmp, &args); 707 return (0); 708 } 709 710 /* 711 * Make the nfs_ip_paranoia sysctl serve as the default connection 712 * or no-connection mode for those protocols that support 713 * no-connection mode (the flag will be cleared later for protocols 714 * that do not support no-connection mode). This will allow a client 715 * to receive replies from a different IP then the request was 716 * sent to. Note: default value for nfs_ip_paranoia is 1 (paranoid), 717 * not 0. 718 */ 719 if (nfs_ip_paranoia == 0) 720 args.flags |= NFSMNT_NOCONN; 721 if (args.fhsize < 0 || args.fhsize > NFSX_V3FHMAX) 722 return (EINVAL); 723 error = copyin((caddr_t)args.fh, (caddr_t)nfh, args.fhsize); 724 if (error) 725 return (error); 726 error = copyinstr(args.hostname, hst, MNAMELEN-1, &len); 727 if (error) 728 return (error); 729 bzero(&hst[len], MNAMELEN - len); 730 /* sockargs() call must be after above copyin() calls */ 731 error = getsockaddr(&nam, (caddr_t)args.addr, args.addrlen); 732 if (error) 733 return (error); 734 args.fh = nfh; 735 error = mountnfs(&args, mp, nam, path, hst, &vp, td->td_ucred); 736 return (error); 737 } 738 739 /* 740 * Common code for mount and mountroot 741 */ 742 static int 743 mountnfs(struct nfs_args *argp, struct mount *mp, struct sockaddr *nam, 744 char *pth, char *hst, struct vnode **vpp, struct ucred *cred) 745 { 746 struct nfsmount *nmp; 747 struct nfsnode *np; 748 int error; 749 struct vattr attrs; 750 751 if (mp->mnt_flag & MNT_UPDATE) { 752 nmp = VFSTONFS(mp); 753 /* update paths, file handles, etc, here XXX */ 754 FREE(nam, M_SONAME); 755 return (0); 756 } else { 757 nmp = uma_zalloc(nfsmount_zone, M_WAITOK); 758 bzero((caddr_t)nmp, sizeof (struct nfsmount)); 759 TAILQ_INIT(&nmp->nm_bufq); 760 mp->mnt_data = (qaddr_t)nmp; 761 } 762 vfs_getnewfsid(mp); 763 nmp->nm_mountp = mp; 764 765 /* 766 * V2 can only handle 32 bit filesizes. A 4GB-1 limit may be too 767 * high, depending on whether we end up with negative offsets in 768 * the client or server somewhere. 2GB-1 may be safer. 769 * 770 * For V3, nfs_fsinfo will adjust this as necessary. Assume maximum 771 * that we can handle until we find out otherwise. 772 * XXX Our "safe" limit on the client is what we can store in our 773 * buffer cache using signed(!) block numbers. 774 */ 775 if ((argp->flags & NFSMNT_NFSV3) == 0) 776 nmp->nm_maxfilesize = 0xffffffffLL; 777 else 778 nmp->nm_maxfilesize = (u_int64_t)0x80000000 * DEV_BSIZE - 1; 779 780 nmp->nm_timeo = NFS_TIMEO; 781 nmp->nm_retry = NFS_RETRANS; 782 if ((argp->flags & NFSMNT_NFSV3) && argp->sotype == SOCK_STREAM) { 783 nmp->nm_wsize = nmp->nm_rsize = NFS_MAXDATA; 784 } else { 785 nmp->nm_wsize = NFS_WSIZE; 786 nmp->nm_rsize = NFS_RSIZE; 787 } 788 nmp->nm_readdirsize = NFS_READDIRSIZE; 789 nmp->nm_numgrps = NFS_MAXGRPS; 790 nmp->nm_readahead = NFS_DEFRAHEAD; 791 nmp->nm_deadthresh = NFS_MAXDEADTHRESH; 792 nmp->nm_tprintf_delay = nfs_tprintf_delay; 793 if (nmp->nm_tprintf_delay < 0) 794 nmp->nm_tprintf_delay = 0; 795 nmp->nm_tprintf_initial_delay = nfs_tprintf_initial_delay; 796 if (nmp->nm_tprintf_initial_delay < 0) 797 nmp->nm_tprintf_initial_delay = 0; 798 nmp->nm_fhsize = argp->fhsize; 799 bcopy((caddr_t)argp->fh, (caddr_t)nmp->nm_fh, argp->fhsize); 800 bcopy(hst, mp->mnt_stat.f_mntfromname, MNAMELEN); 801 bcopy(pth, mp->mnt_stat.f_mntonname, MNAMELEN); 802 nmp->nm_nam = nam; 803 /* Set up the sockets and per-host congestion */ 804 nmp->nm_sotype = argp->sotype; 805 nmp->nm_soproto = argp->proto; 806 nmp->nm_rpcops = &nfs_rpcops; 807 808 nfs_decode_args(nmp, argp); 809 810 /* 811 * For Connection based sockets (TCP,...) defer the connect until 812 * the first request, in case the server is not responding. 813 */ 814 if (nmp->nm_sotype == SOCK_DGRAM && 815 (error = nfs_connect(nmp, NULL))) 816 goto bad; 817 818 /* 819 * This is silly, but it has to be set so that vinifod() works. 820 * We do not want to do an nfs_statfs() here since we can get 821 * stuck on a dead server and we are holding a lock on the mount 822 * point. 823 */ 824 mp->mnt_stat.f_iosize = nfs_iosize(nmp); 825 /* 826 * A reference count is needed on the nfsnode representing the 827 * remote root. If this object is not persistent, then backward 828 * traversals of the mount point (i.e. "..") will not work if 829 * the nfsnode gets flushed out of the cache. Ufs does not have 830 * this problem, because one can identify root inodes by their 831 * number == ROOTINO (2). 832 */ 833 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np); 834 if (error) 835 goto bad; 836 *vpp = NFSTOV(np); 837 838 /* 839 * Get file attributes and transfer parameters for the 840 * mountpoint. This has the side effect of filling in 841 * (*vpp)->v_type with the correct value. 842 */ 843 if (argp->flags & NFSMNT_NFSV3) 844 nfs_fsinfo(nmp, *vpp, curthread->td_ucred, curthread); 845 else 846 VOP_GETATTR(*vpp, &attrs, curthread->td_ucred, curthread); 847 848 /* 849 * Lose the lock but keep the ref. 850 */ 851 VOP_UNLOCK(*vpp, 0, curthread); 852 853 return (0); 854 bad: 855 nfs_disconnect(nmp); 856 uma_zfree(nfsmount_zone, nmp); 857 FREE(nam, M_SONAME); 858 return (error); 859 } 860 861 /* 862 * unmount system call 863 */ 864 static int 865 nfs_unmount(struct mount *mp, int mntflags, struct thread *td) 866 { 867 struct nfsmount *nmp; 868 int error, flags = 0; 869 870 if (mntflags & MNT_FORCE) 871 flags |= FORCECLOSE; 872 nmp = VFSTONFS(mp); 873 /* 874 * Goes something like this.. 875 * - Call vflush() to clear out vnodes for this filesystem 876 * - Close the socket 877 * - Free up the data structures 878 */ 879 /* In the forced case, cancel any outstanding requests. */ 880 if (flags & FORCECLOSE) { 881 error = nfs_nmcancelreqs(nmp); 882 if (error) 883 return (error); 884 } 885 /* We hold 1 extra ref on the root vnode; see comment in mountnfs(). */ 886 error = vflush(mp, 1, flags, td); 887 if (error) 888 return (error); 889 890 /* 891 * We are now committed to the unmount. 892 */ 893 nfs_disconnect(nmp); 894 FREE(nmp->nm_nam, M_SONAME); 895 896 uma_zfree(nfsmount_zone, nmp); 897 return (0); 898 } 899 900 /* 901 * Return root of a filesystem 902 */ 903 static int 904 nfs_root(struct mount *mp, struct vnode **vpp, struct thread *td) 905 { 906 struct vnode *vp; 907 struct nfsmount *nmp; 908 struct nfsnode *np; 909 int error; 910 911 nmp = VFSTONFS(mp); 912 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np); 913 if (error) 914 return (error); 915 vp = NFSTOV(np); 916 /* 917 * Get transfer parameters and attributes for root vnode once. 918 */ 919 if ((nmp->nm_state & NFSSTA_GOTFSINFO) == 0 && 920 (nmp->nm_flag & NFSMNT_NFSV3)) { 921 nfs_fsinfo(nmp, vp, curthread->td_ucred, curthread); 922 } 923 if (vp->v_type == VNON) 924 vp->v_type = VDIR; 925 vp->v_vflag |= VV_ROOT; 926 *vpp = vp; 927 return (0); 928 } 929 930 /* 931 * Flush out the buffer cache 932 */ 933 /* ARGSUSED */ 934 static int 935 nfs_sync(struct mount *mp, int waitfor, struct ucred *cred, struct thread *td) 936 { 937 struct vnode *vp, *nvp; 938 int error, allerror = 0; 939 940 /* 941 * Force stale buffer cache information to be flushed. 942 */ 943 MNT_ILOCK(mp); 944 loop: 945 MNT_VNODE_FOREACH(vp, mp, nvp) { 946 VI_LOCK(vp); 947 MNT_IUNLOCK(mp); 948 if (VOP_ISLOCKED(vp, NULL) || TAILQ_EMPTY(&vp->v_dirtyblkhd) || 949 waitfor == MNT_LAZY) { 950 VI_UNLOCK(vp); 951 MNT_ILOCK(mp); 952 continue; 953 } 954 if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK, td)) { 955 MNT_ILOCK(mp); 956 goto loop; 957 } 958 error = VOP_FSYNC(vp, cred, waitfor, td); 959 if (error) 960 allerror = error; 961 VOP_UNLOCK(vp, 0, td); 962 vrele(vp); 963 964 MNT_ILOCK(mp); 965 } 966 MNT_IUNLOCK(mp); 967 return (allerror); 968 } 969 970 static int 971 nfs_sysctl(struct mount *mp, fsctlop_t op, struct sysctl_req *req) 972 { 973 struct nfsmount *nmp = VFSTONFS(mp); 974 struct vfsquery vq; 975 int error; 976 977 bzero(&vq, sizeof(vq)); 978 switch (op) { 979 #if 0 980 case VFS_CTL_NOLOCKS: 981 val = (nmp->nm_flag & NFSMNT_NOLOCKS) ? 1 : 0; 982 if (req->oldptr != NULL) { 983 error = SYSCTL_OUT(req, &val, sizeof(val)); 984 if (error) 985 return (error); 986 } 987 if (req->newptr != NULL) { 988 error = SYSCTL_IN(req, &val, sizeof(val)); 989 if (error) 990 return (error); 991 if (val) 992 nmp->nm_flag |= NFSMNT_NOLOCKS; 993 else 994 nmp->nm_flag &= ~NFSMNT_NOLOCKS; 995 } 996 break; 997 #endif 998 case VFS_CTL_QUERY: 999 if (nmp->nm_state & NFSSTA_TIMEO) 1000 vq.vq_flags |= VQ_NOTRESP; 1001 #if 0 1002 if (!(nmp->nm_flag & NFSMNT_NOLOCKS) && 1003 (nmp->nm_state & NFSSTA_LOCKTIMEO)) 1004 vq.vq_flags |= VQ_NOTRESPLOCK; 1005 #endif 1006 error = SYSCTL_OUT(req, &vq, sizeof(vq)); 1007 break; 1008 case VFS_CTL_TIMEO: 1009 if (req->oldptr != NULL) { 1010 error = SYSCTL_OUT(req, &nmp->nm_tprintf_initial_delay, 1011 sizeof(nmp->nm_tprintf_initial_delay)); 1012 if (error) 1013 return (error); 1014 } 1015 if (req->newptr != NULL) { 1016 error = vfs_suser(mp, req->td); 1017 if (error) 1018 return (error); 1019 error = SYSCTL_IN(req, &nmp->nm_tprintf_initial_delay, 1020 sizeof(nmp->nm_tprintf_initial_delay)); 1021 if (error) 1022 return (error); 1023 if (nmp->nm_tprintf_initial_delay < 0) 1024 nmp->nm_tprintf_initial_delay = 0; 1025 } 1026 break; 1027 default: 1028 return (ENOTSUP); 1029 } 1030 return (0); 1031 }
Cache object: 72bfe5a1dcd1ddf5fd4ad77867764649
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