Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]
FreeBSD/Linux Kernel Cross Reference
sys/fs/nfsclient/nfs_clvfsops.c
Version:
- FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
SearchContext: - none - 3 - 10
SearchContext: - none - 3 - 10
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 * from nfs_vfsops.c 8.12 (Berkeley) 5/20/95 33 */ 34 35 #include <sys/cdefs.h> 36 __FBSDID("$FreeBSD: releng/9.0/sys/fs/nfsclient/nfs_clvfsops.c 224083 2011-07-16 08:05:41Z zack $"); 37 38 39 #include "opt_bootp.h" 40 #include "opt_nfsroot.h" 41 42 #include <sys/param.h> 43 #include <sys/systm.h> 44 #include <sys/kernel.h> 45 #include <sys/bio.h> 46 #include <sys/buf.h> 47 #include <sys/clock.h> 48 #include <sys/jail.h> 49 #include <sys/limits.h> 50 #include <sys/lock.h> 51 #include <sys/malloc.h> 52 #include <sys/mbuf.h> 53 #include <sys/module.h> 54 #include <sys/mount.h> 55 #include <sys/proc.h> 56 #include <sys/socket.h> 57 #include <sys/socketvar.h> 58 #include <sys/sockio.h> 59 #include <sys/sysctl.h> 60 #include <sys/vnode.h> 61 #include <sys/signalvar.h> 62 63 #include <vm/vm.h> 64 #include <vm/vm_extern.h> 65 #include <vm/uma.h> 66 67 #include <net/if.h> 68 #include <net/route.h> 69 #include <netinet/in.h> 70 71 #include <fs/nfs/nfsport.h> 72 #include <fs/nfsclient/nfsnode.h> 73 #include <fs/nfsclient/nfsmount.h> 74 #include <fs/nfsclient/nfs.h> 75 #include <nfs/nfsdiskless.h> 76 77 FEATURE(nfscl, "NFSv4 client"); 78 79 extern int nfscl_ticks; 80 extern struct timeval nfsboottime; 81 extern struct nfsstats newnfsstats; 82 extern int nfsrv_useacl; 83 84 MALLOC_DEFINE(M_NEWNFSREQ, "newnfsclient_req", "New NFS request header"); 85 MALLOC_DEFINE(M_NEWNFSMNT, "newnfsmnt", "New NFS mount struct"); 86 87 SYSCTL_DECL(_vfs_nfs); 88 static int nfs_ip_paranoia = 1; 89 SYSCTL_INT(_vfs_nfs, OID_AUTO, nfs_ip_paranoia, CTLFLAG_RW, 90 &nfs_ip_paranoia, 0, ""); 91 static int nfs_tprintf_initial_delay = NFS_TPRINTF_INITIAL_DELAY; 92 SYSCTL_INT(_vfs_nfs, NFS_TPRINTF_INITIAL_DELAY, 93 downdelayinitial, CTLFLAG_RW, &nfs_tprintf_initial_delay, 0, ""); 94 /* how long between console messages "nfs server foo not responding" */ 95 static int nfs_tprintf_delay = NFS_TPRINTF_DELAY; 96 SYSCTL_INT(_vfs_nfs, NFS_TPRINTF_DELAY, 97 downdelayinterval, CTLFLAG_RW, &nfs_tprintf_delay, 0, ""); 98 99 static int nfs_mountroot(struct mount *); 100 static void nfs_sec_name(char *, int *); 101 static void nfs_decode_args(struct mount *mp, struct nfsmount *nmp, 102 struct nfs_args *argp, const char *, struct ucred *, 103 struct thread *); 104 static int mountnfs(struct nfs_args *, struct mount *, 105 struct sockaddr *, char *, u_char *, int, u_char *, int, 106 u_char *, int, struct vnode **, struct ucred *, 107 struct thread *, int); 108 static void nfs_getnlminfo(struct vnode *, uint8_t *, size_t *, 109 struct sockaddr_storage *, int *, off_t *, 110 struct timeval *); 111 static vfs_mount_t nfs_mount; 112 static vfs_cmount_t nfs_cmount; 113 static vfs_unmount_t nfs_unmount; 114 static vfs_root_t nfs_root; 115 static vfs_statfs_t nfs_statfs; 116 static vfs_sync_t nfs_sync; 117 static vfs_sysctl_t nfs_sysctl; 118 119 /* 120 * nfs vfs operations. 121 */ 122 static struct vfsops nfs_vfsops = { 123 .vfs_init = ncl_init, 124 .vfs_mount = nfs_mount, 125 .vfs_cmount = nfs_cmount, 126 .vfs_root = nfs_root, 127 .vfs_statfs = nfs_statfs, 128 .vfs_sync = nfs_sync, 129 .vfs_uninit = ncl_uninit, 130 .vfs_unmount = nfs_unmount, 131 .vfs_sysctl = nfs_sysctl, 132 }; 133 VFS_SET(nfs_vfsops, nfs, VFCF_NETWORK); 134 135 /* So that loader and kldload(2) can find us, wherever we are.. */ 136 MODULE_VERSION(nfs, 1); 137 MODULE_DEPEND(nfs, nfscommon, 1, 1, 1); 138 MODULE_DEPEND(nfs, krpc, 1, 1, 1); 139 MODULE_DEPEND(nfs, nfssvc, 1, 1, 1); 140 MODULE_DEPEND(nfs, nfslock, 1, 1, 1); 141 142 /* 143 * This structure is now defined in sys/nfs/nfs_diskless.c so that it 144 * can be shared by both NFS clients. It is declared here so that it 145 * will be defined for kernels built without NFS_ROOT, although it 146 * isn't used in that case. 147 */ 148 #if !defined(NFS_ROOT) && !defined(NFSCLIENT) 149 struct nfs_diskless nfs_diskless = { { { 0 } } }; 150 struct nfsv3_diskless nfsv3_diskless = { { { 0 } } }; 151 int nfs_diskless_valid = 0; 152 #endif 153 154 SYSCTL_INT(_vfs_nfs, OID_AUTO, diskless_valid, CTLFLAG_RD, 155 &nfs_diskless_valid, 0, 156 "Has the diskless struct been filled correctly"); 157 158 SYSCTL_STRING(_vfs_nfs, OID_AUTO, diskless_rootpath, CTLFLAG_RD, 159 nfsv3_diskless.root_hostnam, 0, "Path to nfs root"); 160 161 SYSCTL_OPAQUE(_vfs_nfs, OID_AUTO, diskless_rootaddr, CTLFLAG_RD, 162 &nfsv3_diskless.root_saddr, sizeof(nfsv3_diskless.root_saddr), 163 "%Ssockaddr_in", "Diskless root nfs address"); 164 165 166 void newnfsargs_ntoh(struct nfs_args *); 167 static int nfs_mountdiskless(char *, 168 struct sockaddr_in *, struct nfs_args *, 169 struct thread *, struct vnode **, struct mount *); 170 static void nfs_convert_diskless(void); 171 static void nfs_convert_oargs(struct nfs_args *args, 172 struct onfs_args *oargs); 173 174 int 175 newnfs_iosize(struct nfsmount *nmp) 176 { 177 int iosize, maxio; 178 179 /* First, set the upper limit for iosize */ 180 if (nmp->nm_flag & NFSMNT_NFSV4) { 181 maxio = NFS_MAXBSIZE; 182 } else if (nmp->nm_flag & NFSMNT_NFSV3) { 183 if (nmp->nm_sotype == SOCK_DGRAM) 184 maxio = NFS_MAXDGRAMDATA; 185 else 186 maxio = NFS_MAXBSIZE; 187 } else { 188 maxio = NFS_V2MAXDATA; 189 } 190 if (nmp->nm_rsize > maxio || nmp->nm_rsize == 0) 191 nmp->nm_rsize = maxio; 192 if (nmp->nm_rsize > MAXBSIZE) 193 nmp->nm_rsize = MAXBSIZE; 194 if (nmp->nm_readdirsize > maxio || nmp->nm_readdirsize == 0) 195 nmp->nm_readdirsize = maxio; 196 if (nmp->nm_readdirsize > nmp->nm_rsize) 197 nmp->nm_readdirsize = nmp->nm_rsize; 198 if (nmp->nm_wsize > maxio || nmp->nm_wsize == 0) 199 nmp->nm_wsize = maxio; 200 if (nmp->nm_wsize > MAXBSIZE) 201 nmp->nm_wsize = MAXBSIZE; 202 203 /* 204 * Calculate the size used for io buffers. Use the larger 205 * of the two sizes to minimise nfs requests but make sure 206 * that it is at least one VM page to avoid wasting buffer 207 * space. 208 */ 209 iosize = imax(nmp->nm_rsize, nmp->nm_wsize); 210 iosize = imax(iosize, PAGE_SIZE); 211 nmp->nm_mountp->mnt_stat.f_iosize = iosize; 212 return (iosize); 213 } 214 215 static void 216 nfs_convert_oargs(struct nfs_args *args, struct onfs_args *oargs) 217 { 218 219 args->version = NFS_ARGSVERSION; 220 args->addr = oargs->addr; 221 args->addrlen = oargs->addrlen; 222 args->sotype = oargs->sotype; 223 args->proto = oargs->proto; 224 args->fh = oargs->fh; 225 args->fhsize = oargs->fhsize; 226 args->flags = oargs->flags; 227 args->wsize = oargs->wsize; 228 args->rsize = oargs->rsize; 229 args->readdirsize = oargs->readdirsize; 230 args->timeo = oargs->timeo; 231 args->retrans = oargs->retrans; 232 args->readahead = oargs->readahead; 233 args->hostname = oargs->hostname; 234 } 235 236 static void 237 nfs_convert_diskless(void) 238 { 239 240 bcopy(&nfs_diskless.myif, &nfsv3_diskless.myif, 241 sizeof(struct ifaliasreq)); 242 bcopy(&nfs_diskless.mygateway, &nfsv3_diskless.mygateway, 243 sizeof(struct sockaddr_in)); 244 nfs_convert_oargs(&nfsv3_diskless.root_args,&nfs_diskless.root_args); 245 if (nfsv3_diskless.root_args.flags & NFSMNT_NFSV3) { 246 nfsv3_diskless.root_fhsize = NFSX_MYFH; 247 bcopy(nfs_diskless.root_fh, nfsv3_diskless.root_fh, NFSX_MYFH); 248 } else { 249 nfsv3_diskless.root_fhsize = NFSX_V2FH; 250 bcopy(nfs_diskless.root_fh, nfsv3_diskless.root_fh, NFSX_V2FH); 251 } 252 bcopy(&nfs_diskless.root_saddr,&nfsv3_diskless.root_saddr, 253 sizeof(struct sockaddr_in)); 254 bcopy(nfs_diskless.root_hostnam, nfsv3_diskless.root_hostnam, MNAMELEN); 255 nfsv3_diskless.root_time = nfs_diskless.root_time; 256 bcopy(nfs_diskless.my_hostnam, nfsv3_diskless.my_hostnam, 257 MAXHOSTNAMELEN); 258 nfs_diskless_valid = 3; 259 } 260 261 /* 262 * nfs statfs call 263 */ 264 static int 265 nfs_statfs(struct mount *mp, struct statfs *sbp) 266 { 267 struct vnode *vp; 268 struct thread *td; 269 struct nfsmount *nmp = VFSTONFS(mp); 270 struct nfsvattr nfsva; 271 struct nfsfsinfo fs; 272 struct nfsstatfs sb; 273 int error = 0, attrflag, gotfsinfo = 0, ret; 274 struct nfsnode *np; 275 276 td = curthread; 277 278 error = vfs_busy(mp, MBF_NOWAIT); 279 if (error) 280 return (error); 281 error = ncl_nget(mp, nmp->nm_fh, nmp->nm_fhsize, &np, LK_EXCLUSIVE); 282 if (error) { 283 vfs_unbusy(mp); 284 return (error); 285 } 286 vp = NFSTOV(np); 287 mtx_lock(&nmp->nm_mtx); 288 if (NFSHASNFSV3(nmp) && !NFSHASGOTFSINFO(nmp)) { 289 mtx_unlock(&nmp->nm_mtx); 290 error = nfsrpc_fsinfo(vp, &fs, td->td_ucred, td, &nfsva, 291 &attrflag, NULL); 292 if (!error) 293 gotfsinfo = 1; 294 } else 295 mtx_unlock(&nmp->nm_mtx); 296 if (!error) 297 error = nfsrpc_statfs(vp, &sb, &fs, td->td_ucred, td, &nfsva, 298 &attrflag, NULL); 299 if (attrflag == 0) { 300 ret = nfsrpc_getattrnovp(nmp, nmp->nm_fh, nmp->nm_fhsize, 1, 301 td->td_ucred, td, &nfsva, NULL); 302 if (ret) { 303 /* 304 * Just set default values to get things going. 305 */ 306 NFSBZERO((caddr_t)&nfsva, sizeof (struct nfsvattr)); 307 nfsva.na_vattr.va_type = VDIR; 308 nfsva.na_vattr.va_mode = 0777; 309 nfsva.na_vattr.va_nlink = 100; 310 nfsva.na_vattr.va_uid = (uid_t)0; 311 nfsva.na_vattr.va_gid = (gid_t)0; 312 nfsva.na_vattr.va_fileid = 2; 313 nfsva.na_vattr.va_gen = 1; 314 nfsva.na_vattr.va_blocksize = NFS_FABLKSIZE; 315 nfsva.na_vattr.va_size = 512 * 1024; 316 } 317 } 318 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1); 319 if (!error) { 320 mtx_lock(&nmp->nm_mtx); 321 if (gotfsinfo || (nmp->nm_flag & NFSMNT_NFSV4)) 322 nfscl_loadfsinfo(nmp, &fs); 323 nfscl_loadsbinfo(nmp, &sb, sbp); 324 sbp->f_iosize = newnfs_iosize(nmp); 325 mtx_unlock(&nmp->nm_mtx); 326 if (sbp != &mp->mnt_stat) { 327 bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN); 328 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); 329 } 330 strncpy(&sbp->f_fstypename[0], mp->mnt_vfc->vfc_name, MFSNAMELEN); 331 } else if (NFS_ISV4(vp)) { 332 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0); 333 } 334 vput(vp); 335 vfs_unbusy(mp); 336 return (error); 337 } 338 339 /* 340 * nfs version 3 fsinfo rpc call 341 */ 342 int 343 ncl_fsinfo(struct nfsmount *nmp, struct vnode *vp, struct ucred *cred, 344 struct thread *td) 345 { 346 struct nfsfsinfo fs; 347 struct nfsvattr nfsva; 348 int error, attrflag; 349 350 error = nfsrpc_fsinfo(vp, &fs, cred, td, &nfsva, &attrflag, NULL); 351 if (!error) { 352 if (attrflag) 353 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 354 1); 355 mtx_lock(&nmp->nm_mtx); 356 nfscl_loadfsinfo(nmp, &fs); 357 mtx_unlock(&nmp->nm_mtx); 358 } 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 static int 379 nfs_mountroot(struct mount *mp) 380 { 381 struct thread *td = curthread; 382 struct nfsv3_diskless *nd = &nfsv3_diskless; 383 struct socket *so; 384 struct vnode *vp; 385 struct ifreq ir; 386 int error; 387 u_long l; 388 char buf[128]; 389 char *cp; 390 391 #if defined(BOOTP_NFSROOT) && defined(BOOTP) 392 bootpc_init(); /* use bootp to get nfs_diskless filled in */ 393 #elif defined(NFS_ROOT) 394 nfs_setup_diskless(); 395 #endif 396 397 if (nfs_diskless_valid == 0) 398 return (-1); 399 if (nfs_diskless_valid == 1) 400 nfs_convert_diskless(); 401 402 /* 403 * XXX splnet, so networks will receive... 404 */ 405 splnet(); 406 407 /* 408 * Do enough of ifconfig(8) so that the critical net interface can 409 * talk to the server. 410 */ 411 error = socreate(nd->myif.ifra_addr.sa_family, &so, nd->root_args.sotype, 0, 412 td->td_ucred, td); 413 if (error) 414 panic("nfs_mountroot: socreate(%04x): %d", 415 nd->myif.ifra_addr.sa_family, error); 416 417 #if 0 /* XXX Bad idea */ 418 /* 419 * We might not have been told the right interface, so we pass 420 * over the first ten interfaces of the same kind, until we get 421 * one of them configured. 422 */ 423 424 for (i = strlen(nd->myif.ifra_name) - 1; 425 nd->myif.ifra_name[i] >= '' && 426 nd->myif.ifra_name[i] <= '9'; 427 nd->myif.ifra_name[i] ++) { 428 error = ifioctl(so, SIOCAIFADDR, (caddr_t)&nd->myif, td); 429 if(!error) 430 break; 431 } 432 #endif 433 error = ifioctl(so, SIOCAIFADDR, (caddr_t)&nd->myif, td); 434 if (error) 435 panic("nfs_mountroot: SIOCAIFADDR: %d", error); 436 if ((cp = getenv("boot.netif.mtu")) != NULL) { 437 ir.ifr_mtu = strtol(cp, NULL, 10); 438 bcopy(nd->myif.ifra_name, ir.ifr_name, IFNAMSIZ); 439 freeenv(cp); 440 error = ifioctl(so, SIOCSIFMTU, (caddr_t)&ir, td); 441 if (error) 442 printf("nfs_mountroot: SIOCSIFMTU: %d", error); 443 } 444 soclose(so); 445 446 /* 447 * If the gateway field is filled in, set it as the default route. 448 * Note that pxeboot will set a default route of 0 if the route 449 * is not set by the DHCP server. Check also for a value of 0 450 * to avoid panicking inappropriately in that situation. 451 */ 452 if (nd->mygateway.sin_len != 0 && 453 nd->mygateway.sin_addr.s_addr != 0) { 454 struct sockaddr_in mask, sin; 455 456 bzero((caddr_t)&mask, sizeof(mask)); 457 sin = mask; 458 sin.sin_family = AF_INET; 459 sin.sin_len = sizeof(sin); 460 /* XXX MRT use table 0 for this sort of thing */ 461 CURVNET_SET(TD_TO_VNET(td)); 462 error = rtrequest(RTM_ADD, (struct sockaddr *)&sin, 463 (struct sockaddr *)&nd->mygateway, 464 (struct sockaddr *)&mask, 465 RTF_UP | RTF_GATEWAY, NULL); 466 CURVNET_RESTORE(); 467 if (error) 468 panic("nfs_mountroot: RTM_ADD: %d", error); 469 } 470 471 /* 472 * Create the rootfs mount point. 473 */ 474 nd->root_args.fh = nd->root_fh; 475 nd->root_args.fhsize = nd->root_fhsize; 476 l = ntohl(nd->root_saddr.sin_addr.s_addr); 477 snprintf(buf, sizeof(buf), "%ld.%ld.%ld.%ld:%s", 478 (l >> 24) & 0xff, (l >> 16) & 0xff, 479 (l >> 8) & 0xff, (l >> 0) & 0xff, nd->root_hostnam); 480 printf("NFS ROOT: %s\n", buf); 481 nd->root_args.hostname = buf; 482 if ((error = nfs_mountdiskless(buf, 483 &nd->root_saddr, &nd->root_args, td, &vp, mp)) != 0) { 484 return (error); 485 } 486 487 /* 488 * This is not really an nfs issue, but it is much easier to 489 * set hostname here and then let the "/etc/rc.xxx" files 490 * mount the right /var based upon its preset value. 491 */ 492 mtx_lock(&prison0.pr_mtx); 493 strlcpy(prison0.pr_hostname, nd->my_hostnam, 494 sizeof(prison0.pr_hostname)); 495 mtx_unlock(&prison0.pr_mtx); 496 inittodr(ntohl(nd->root_time)); 497 return (0); 498 } 499 500 /* 501 * Internal version of mount system call for diskless setup. 502 */ 503 static int 504 nfs_mountdiskless(char *path, 505 struct sockaddr_in *sin, struct nfs_args *args, struct thread *td, 506 struct vnode **vpp, struct mount *mp) 507 { 508 struct sockaddr *nam; 509 int dirlen, error; 510 char *dirpath; 511 512 /* 513 * Find the directory path in "path", which also has the server's 514 * name/ip address in it. 515 */ 516 dirpath = strchr(path, ':'); 517 if (dirpath != NULL) 518 dirlen = strlen(++dirpath); 519 else 520 dirlen = 0; 521 nam = sodupsockaddr((struct sockaddr *)sin, M_WAITOK); 522 if ((error = mountnfs(args, mp, nam, path, NULL, 0, dirpath, dirlen, 523 NULL, 0, vpp, td->td_ucred, td, NFS_DEFAULT_NEGNAMETIMEO)) != 0) { 524 printf("nfs_mountroot: mount %s on /: %d\n", path, error); 525 return (error); 526 } 527 return (0); 528 } 529 530 static void 531 nfs_sec_name(char *sec, int *flagsp) 532 { 533 if (!strcmp(sec, "krb5")) 534 *flagsp |= NFSMNT_KERB; 535 else if (!strcmp(sec, "krb5i")) 536 *flagsp |= (NFSMNT_KERB | NFSMNT_INTEGRITY); 537 else if (!strcmp(sec, "krb5p")) 538 *flagsp |= (NFSMNT_KERB | NFSMNT_PRIVACY); 539 } 540 541 static void 542 nfs_decode_args(struct mount *mp, struct nfsmount *nmp, struct nfs_args *argp, 543 const char *hostname, struct ucred *cred, struct thread *td) 544 { 545 int s; 546 int adjsock; 547 char *p; 548 549 s = splnet(); 550 551 /* 552 * Set read-only flag if requested; otherwise, clear it if this is 553 * an update. If this is not an update, then either the read-only 554 * flag is already clear, or this is a root mount and it was set 555 * intentionally at some previous point. 556 */ 557 if (vfs_getopt(mp->mnt_optnew, "ro", NULL, NULL) == 0) { 558 MNT_ILOCK(mp); 559 mp->mnt_flag |= MNT_RDONLY; 560 MNT_IUNLOCK(mp); 561 } else if (mp->mnt_flag & MNT_UPDATE) { 562 MNT_ILOCK(mp); 563 mp->mnt_flag &= ~MNT_RDONLY; 564 MNT_IUNLOCK(mp); 565 } 566 567 /* 568 * Silently clear NFSMNT_NOCONN if it's a TCP mount, it makes 569 * no sense in that context. Also, set up appropriate retransmit 570 * and soft timeout behavior. 571 */ 572 if (argp->sotype == SOCK_STREAM) { 573 nmp->nm_flag &= ~NFSMNT_NOCONN; 574 nmp->nm_timeo = NFS_MAXTIMEO; 575 if ((argp->flags & NFSMNT_NFSV4) != 0) 576 nmp->nm_retry = INT_MAX; 577 else 578 nmp->nm_retry = NFS_RETRANS_TCP; 579 } 580 581 /* Also clear RDIRPLUS if NFSv2, it crashes some servers */ 582 if ((argp->flags & (NFSMNT_NFSV3 | NFSMNT_NFSV4)) == 0) { 583 argp->flags &= ~NFSMNT_RDIRPLUS; 584 nmp->nm_flag &= ~NFSMNT_RDIRPLUS; 585 } 586 587 /* Clear NFSMNT_RESVPORT for NFSv4, since it is not required. */ 588 if ((argp->flags & NFSMNT_NFSV4) != 0) { 589 argp->flags &= ~NFSMNT_RESVPORT; 590 nmp->nm_flag &= ~NFSMNT_RESVPORT; 591 } 592 593 /* Re-bind if rsrvd port requested and wasn't on one */ 594 adjsock = !(nmp->nm_flag & NFSMNT_RESVPORT) 595 && (argp->flags & NFSMNT_RESVPORT); 596 /* Also re-bind if we're switching to/from a connected UDP socket */ 597 adjsock |= ((nmp->nm_flag & NFSMNT_NOCONN) != 598 (argp->flags & NFSMNT_NOCONN)); 599 600 /* Update flags atomically. Don't change the lock bits. */ 601 nmp->nm_flag = argp->flags | nmp->nm_flag; 602 splx(s); 603 604 if ((argp->flags & NFSMNT_TIMEO) && argp->timeo > 0) { 605 nmp->nm_timeo = (argp->timeo * NFS_HZ + 5) / 10; 606 if (nmp->nm_timeo < NFS_MINTIMEO) 607 nmp->nm_timeo = NFS_MINTIMEO; 608 else if (nmp->nm_timeo > NFS_MAXTIMEO) 609 nmp->nm_timeo = NFS_MAXTIMEO; 610 } 611 612 if ((argp->flags & NFSMNT_RETRANS) && argp->retrans > 1) { 613 nmp->nm_retry = argp->retrans; 614 if (nmp->nm_retry > NFS_MAXREXMIT) 615 nmp->nm_retry = NFS_MAXREXMIT; 616 } 617 618 if ((argp->flags & NFSMNT_WSIZE) && argp->wsize > 0) { 619 nmp->nm_wsize = argp->wsize; 620 /* Round down to multiple of blocksize */ 621 nmp->nm_wsize &= ~(NFS_FABLKSIZE - 1); 622 if (nmp->nm_wsize <= 0) 623 nmp->nm_wsize = NFS_FABLKSIZE; 624 } 625 626 if ((argp->flags & NFSMNT_RSIZE) && argp->rsize > 0) { 627 nmp->nm_rsize = argp->rsize; 628 /* Round down to multiple of blocksize */ 629 nmp->nm_rsize &= ~(NFS_FABLKSIZE - 1); 630 if (nmp->nm_rsize <= 0) 631 nmp->nm_rsize = NFS_FABLKSIZE; 632 } 633 634 if ((argp->flags & NFSMNT_READDIRSIZE) && argp->readdirsize > 0) { 635 nmp->nm_readdirsize = argp->readdirsize; 636 } 637 638 if ((argp->flags & NFSMNT_ACREGMIN) && argp->acregmin >= 0) 639 nmp->nm_acregmin = argp->acregmin; 640 else 641 nmp->nm_acregmin = NFS_MINATTRTIMO; 642 if ((argp->flags & NFSMNT_ACREGMAX) && argp->acregmax >= 0) 643 nmp->nm_acregmax = argp->acregmax; 644 else 645 nmp->nm_acregmax = NFS_MAXATTRTIMO; 646 if ((argp->flags & NFSMNT_ACDIRMIN) && argp->acdirmin >= 0) 647 nmp->nm_acdirmin = argp->acdirmin; 648 else 649 nmp->nm_acdirmin = NFS_MINDIRATTRTIMO; 650 if ((argp->flags & NFSMNT_ACDIRMAX) && argp->acdirmax >= 0) 651 nmp->nm_acdirmax = argp->acdirmax; 652 else 653 nmp->nm_acdirmax = NFS_MAXDIRATTRTIMO; 654 if (nmp->nm_acdirmin > nmp->nm_acdirmax) 655 nmp->nm_acdirmin = nmp->nm_acdirmax; 656 if (nmp->nm_acregmin > nmp->nm_acregmax) 657 nmp->nm_acregmin = nmp->nm_acregmax; 658 659 if ((argp->flags & NFSMNT_READAHEAD) && argp->readahead >= 0) { 660 if (argp->readahead <= NFS_MAXRAHEAD) 661 nmp->nm_readahead = argp->readahead; 662 else 663 nmp->nm_readahead = NFS_MAXRAHEAD; 664 } 665 if ((argp->flags & NFSMNT_WCOMMITSIZE) && argp->wcommitsize >= 0) { 666 if (argp->wcommitsize < nmp->nm_wsize) 667 nmp->nm_wcommitsize = nmp->nm_wsize; 668 else 669 nmp->nm_wcommitsize = argp->wcommitsize; 670 } 671 672 adjsock |= ((nmp->nm_sotype != argp->sotype) || 673 (nmp->nm_soproto != argp->proto)); 674 675 if (nmp->nm_client != NULL && adjsock) { 676 int haslock = 0, error = 0; 677 678 if (nmp->nm_sotype == SOCK_STREAM) { 679 error = newnfs_sndlock(&nmp->nm_sockreq.nr_lock); 680 if (!error) 681 haslock = 1; 682 } 683 if (!error) { 684 newnfs_disconnect(&nmp->nm_sockreq); 685 if (haslock) 686 newnfs_sndunlock(&nmp->nm_sockreq.nr_lock); 687 nmp->nm_sotype = argp->sotype; 688 nmp->nm_soproto = argp->proto; 689 if (nmp->nm_sotype == SOCK_DGRAM) 690 while (newnfs_connect(nmp, &nmp->nm_sockreq, 691 cred, td, 0)) { 692 printf("newnfs_args: retrying connect\n"); 693 (void) nfs_catnap(PSOCK, 0, "newnfscon"); 694 } 695 } 696 } else { 697 nmp->nm_sotype = argp->sotype; 698 nmp->nm_soproto = argp->proto; 699 } 700 701 if (hostname != NULL) { 702 strlcpy(nmp->nm_hostname, hostname, 703 sizeof(nmp->nm_hostname)); 704 p = strchr(nmp->nm_hostname, ':'); 705 if (p != NULL) 706 *p = '\0'; 707 } 708 } 709 710 static const char *nfs_opts[] = { "from", "nfs_args", 711 "noatime", "noexec", "suiddir", "nosuid", "nosymfollow", "union", 712 "noclusterr", "noclusterw", "multilabel", "acls", "force", "update", 713 "async", "noconn", "nolockd", "conn", "lockd", "intr", "rdirplus", 714 "readdirsize", "soft", "hard", "mntudp", "tcp", "udp", "wsize", "rsize", 715 "retrans", "acregmin", "acregmax", "acdirmin", "acdirmax", "resvport", 716 "readahead", "hostname", "timeout", "addr", "fh", "nfsv3", "sec", 717 "principal", "nfsv4", "gssname", "allgssname", "dirpath", 718 "negnametimeo", "nocto", 719 NULL }; 720 721 /* 722 * VFS Operations. 723 * 724 * mount system call 725 * It seems a bit dumb to copyinstr() the host and path here and then 726 * bcopy() them in mountnfs(), but I wanted to detect errors before 727 * doing the sockargs() call because sockargs() allocates an mbuf and 728 * an error after that means that I have to release the mbuf. 729 */ 730 /* ARGSUSED */ 731 static int 732 nfs_mount(struct mount *mp) 733 { 734 struct nfs_args args = { 735 .version = NFS_ARGSVERSION, 736 .addr = NULL, 737 .addrlen = sizeof (struct sockaddr_in), 738 .sotype = SOCK_STREAM, 739 .proto = 0, 740 .fh = NULL, 741 .fhsize = 0, 742 .flags = NFSMNT_RESVPORT, 743 .wsize = NFS_WSIZE, 744 .rsize = NFS_RSIZE, 745 .readdirsize = NFS_READDIRSIZE, 746 .timeo = 10, 747 .retrans = NFS_RETRANS, 748 .readahead = NFS_DEFRAHEAD, 749 .wcommitsize = 0, /* was: NQ_DEFLEASE */ 750 .hostname = NULL, 751 .acregmin = NFS_MINATTRTIMO, 752 .acregmax = NFS_MAXATTRTIMO, 753 .acdirmin = NFS_MINDIRATTRTIMO, 754 .acdirmax = NFS_MAXDIRATTRTIMO, 755 }; 756 int error = 0, ret, len; 757 struct sockaddr *nam = NULL; 758 struct vnode *vp; 759 struct thread *td; 760 char hst[MNAMELEN]; 761 u_char nfh[NFSX_FHMAX], krbname[100], dirpath[100], srvkrbname[100]; 762 char *opt, *name, *secname; 763 int negnametimeo = NFS_DEFAULT_NEGNAMETIMEO; 764 int dirlen, has_nfs_args_opt, krbnamelen, srvkrbnamelen; 765 size_t hstlen; 766 767 has_nfs_args_opt = 0; 768 if (vfs_filteropt(mp->mnt_optnew, nfs_opts)) { 769 error = EINVAL; 770 goto out; 771 } 772 773 td = curthread; 774 if ((mp->mnt_flag & (MNT_ROOTFS | MNT_UPDATE)) == MNT_ROOTFS) { 775 error = nfs_mountroot(mp); 776 goto out; 777 } 778 779 nfscl_init(); 780 781 /* 782 * The old mount_nfs program passed the struct nfs_args 783 * from userspace to kernel. The new mount_nfs program 784 * passes string options via nmount() from userspace to kernel 785 * and we populate the struct nfs_args in the kernel. 786 */ 787 if (vfs_getopt(mp->mnt_optnew, "nfs_args", NULL, NULL) == 0) { 788 error = vfs_copyopt(mp->mnt_optnew, "nfs_args", &args, 789 sizeof(args)); 790 if (error != 0) 791 goto out; 792 793 if (args.version != NFS_ARGSVERSION) { 794 error = EPROGMISMATCH; 795 goto out; 796 } 797 has_nfs_args_opt = 1; 798 } 799 800 /* Handle the new style options. */ 801 if (vfs_getopt(mp->mnt_optnew, "noconn", NULL, NULL) == 0) 802 args.flags |= NFSMNT_NOCONN; 803 if (vfs_getopt(mp->mnt_optnew, "conn", NULL, NULL) == 0) 804 args.flags |= NFSMNT_NOCONN; 805 if (vfs_getopt(mp->mnt_optnew, "nolockd", NULL, NULL) == 0) 806 args.flags |= NFSMNT_NOLOCKD; 807 if (vfs_getopt(mp->mnt_optnew, "lockd", NULL, NULL) == 0) 808 args.flags &= ~NFSMNT_NOLOCKD; 809 if (vfs_getopt(mp->mnt_optnew, "intr", NULL, NULL) == 0) 810 args.flags |= NFSMNT_INT; 811 if (vfs_getopt(mp->mnt_optnew, "rdirplus", NULL, NULL) == 0) 812 args.flags |= NFSMNT_RDIRPLUS; 813 if (vfs_getopt(mp->mnt_optnew, "resvport", NULL, NULL) == 0) 814 args.flags |= NFSMNT_RESVPORT; 815 if (vfs_getopt(mp->mnt_optnew, "noresvport", NULL, NULL) == 0) 816 args.flags &= ~NFSMNT_RESVPORT; 817 if (vfs_getopt(mp->mnt_optnew, "soft", NULL, NULL) == 0) 818 args.flags |= NFSMNT_SOFT; 819 if (vfs_getopt(mp->mnt_optnew, "hard", NULL, NULL) == 0) 820 args.flags &= ~NFSMNT_SOFT; 821 if (vfs_getopt(mp->mnt_optnew, "mntudp", NULL, NULL) == 0) 822 args.sotype = SOCK_DGRAM; 823 if (vfs_getopt(mp->mnt_optnew, "udp", NULL, NULL) == 0) 824 args.sotype = SOCK_DGRAM; 825 if (vfs_getopt(mp->mnt_optnew, "tcp", NULL, NULL) == 0) 826 args.sotype = SOCK_STREAM; 827 if (vfs_getopt(mp->mnt_optnew, "nfsv3", NULL, NULL) == 0) 828 args.flags |= NFSMNT_NFSV3; 829 if (vfs_getopt(mp->mnt_optnew, "nfsv4", NULL, NULL) == 0) { 830 args.flags |= NFSMNT_NFSV4; 831 args.sotype = SOCK_STREAM; 832 } 833 if (vfs_getopt(mp->mnt_optnew, "allgssname", NULL, NULL) == 0) 834 args.flags |= NFSMNT_ALLGSSNAME; 835 if (vfs_getopt(mp->mnt_optnew, "nocto", NULL, NULL) == 0) 836 args.flags |= NFSMNT_NOCTO; 837 if (vfs_getopt(mp->mnt_optnew, "readdirsize", (void **)&opt, NULL) == 0) { 838 if (opt == NULL) { 839 vfs_mount_error(mp, "illegal readdirsize"); 840 error = EINVAL; 841 goto out; 842 } 843 ret = sscanf(opt, "%d", &args.readdirsize); 844 if (ret != 1 || args.readdirsize <= 0) { 845 vfs_mount_error(mp, "illegal readdirsize: %s", 846 opt); 847 error = EINVAL; 848 goto out; 849 } 850 args.flags |= NFSMNT_READDIRSIZE; 851 } 852 if (vfs_getopt(mp->mnt_optnew, "readahead", (void **)&opt, NULL) == 0) { 853 if (opt == NULL) { 854 vfs_mount_error(mp, "illegal readahead"); 855 error = EINVAL; 856 goto out; 857 } 858 ret = sscanf(opt, "%d", &args.readahead); 859 if (ret != 1 || args.readahead <= 0) { 860 vfs_mount_error(mp, "illegal readahead: %s", 861 opt); 862 error = EINVAL; 863 goto out; 864 } 865 args.flags |= NFSMNT_READAHEAD; 866 } 867 if (vfs_getopt(mp->mnt_optnew, "wsize", (void **)&opt, NULL) == 0) { 868 if (opt == NULL) { 869 vfs_mount_error(mp, "illegal wsize"); 870 error = EINVAL; 871 goto out; 872 } 873 ret = sscanf(opt, "%d", &args.wsize); 874 if (ret != 1 || args.wsize <= 0) { 875 vfs_mount_error(mp, "illegal wsize: %s", 876 opt); 877 error = EINVAL; 878 goto out; 879 } 880 args.flags |= NFSMNT_WSIZE; 881 } 882 if (vfs_getopt(mp->mnt_optnew, "rsize", (void **)&opt, NULL) == 0) { 883 if (opt == NULL) { 884 vfs_mount_error(mp, "illegal rsize"); 885 error = EINVAL; 886 goto out; 887 } 888 ret = sscanf(opt, "%d", &args.rsize); 889 if (ret != 1 || args.rsize <= 0) { 890 vfs_mount_error(mp, "illegal wsize: %s", 891 opt); 892 error = EINVAL; 893 goto out; 894 } 895 args.flags |= NFSMNT_RSIZE; 896 } 897 if (vfs_getopt(mp->mnt_optnew, "retrans", (void **)&opt, NULL) == 0) { 898 if (opt == NULL) { 899 vfs_mount_error(mp, "illegal retrans"); 900 error = EINVAL; 901 goto out; 902 } 903 ret = sscanf(opt, "%d", &args.retrans); 904 if (ret != 1 || args.retrans <= 0) { 905 vfs_mount_error(mp, "illegal retrans: %s", 906 opt); 907 error = EINVAL; 908 goto out; 909 } 910 args.flags |= NFSMNT_RETRANS; 911 } 912 if (vfs_getopt(mp->mnt_optnew, "acregmin", (void **)&opt, NULL) == 0) { 913 ret = sscanf(opt, "%d", &args.acregmin); 914 if (ret != 1 || args.acregmin < 0) { 915 vfs_mount_error(mp, "illegal acregmin: %s", 916 opt); 917 error = EINVAL; 918 goto out; 919 } 920 args.flags |= NFSMNT_ACREGMIN; 921 } 922 if (vfs_getopt(mp->mnt_optnew, "acregmax", (void **)&opt, NULL) == 0) { 923 ret = sscanf(opt, "%d", &args.acregmax); 924 if (ret != 1 || args.acregmax < 0) { 925 vfs_mount_error(mp, "illegal acregmax: %s", 926 opt); 927 error = EINVAL; 928 goto out; 929 } 930 args.flags |= NFSMNT_ACREGMAX; 931 } 932 if (vfs_getopt(mp->mnt_optnew, "acdirmin", (void **)&opt, NULL) == 0) { 933 ret = sscanf(opt, "%d", &args.acdirmin); 934 if (ret != 1 || args.acdirmin < 0) { 935 vfs_mount_error(mp, "illegal acdirmin: %s", 936 opt); 937 error = EINVAL; 938 goto out; 939 } 940 args.flags |= NFSMNT_ACDIRMIN; 941 } 942 if (vfs_getopt(mp->mnt_optnew, "acdirmax", (void **)&opt, NULL) == 0) { 943 ret = sscanf(opt, "%d", &args.acdirmax); 944 if (ret != 1 || args.acdirmax < 0) { 945 vfs_mount_error(mp, "illegal acdirmax: %s", 946 opt); 947 error = EINVAL; 948 goto out; 949 } 950 args.flags |= NFSMNT_ACDIRMAX; 951 } 952 if (vfs_getopt(mp->mnt_optnew, "timeout", (void **)&opt, NULL) == 0) { 953 ret = sscanf(opt, "%d", &args.timeo); 954 if (ret != 1 || args.timeo <= 0) { 955 vfs_mount_error(mp, "illegal timeout: %s", 956 opt); 957 error = EINVAL; 958 goto out; 959 } 960 args.flags |= NFSMNT_TIMEO; 961 } 962 if (vfs_getopt(mp->mnt_optnew, "negnametimeo", (void **)&opt, NULL) 963 == 0) { 964 ret = sscanf(opt, "%d", &negnametimeo); 965 if (ret != 1 || negnametimeo < 0) { 966 vfs_mount_error(mp, "illegal negnametimeo: %s", 967 opt); 968 error = EINVAL; 969 goto out; 970 } 971 } 972 if (vfs_getopt(mp->mnt_optnew, "sec", 973 (void **) &secname, NULL) == 0) 974 nfs_sec_name(secname, &args.flags); 975 976 if (mp->mnt_flag & MNT_UPDATE) { 977 struct nfsmount *nmp = VFSTONFS(mp); 978 979 if (nmp == NULL) { 980 error = EIO; 981 goto out; 982 } 983 /* 984 * When doing an update, we can't change version, 985 * security, switch lockd strategies or change cookie 986 * translation 987 */ 988 args.flags = (args.flags & 989 ~(NFSMNT_NFSV3 | 990 NFSMNT_NFSV4 | 991 NFSMNT_KERB | 992 NFSMNT_INTEGRITY | 993 NFSMNT_PRIVACY | 994 NFSMNT_NOLOCKD /*|NFSMNT_XLATECOOKIE*/)) | 995 (nmp->nm_flag & 996 (NFSMNT_NFSV3 | 997 NFSMNT_NFSV4 | 998 NFSMNT_KERB | 999 NFSMNT_INTEGRITY | 1000 NFSMNT_PRIVACY | 1001 NFSMNT_NOLOCKD /*|NFSMNT_XLATECOOKIE*/)); 1002 nfs_decode_args(mp, nmp, &args, NULL, td->td_ucred, td); 1003 goto out; 1004 } 1005 1006 /* 1007 * Make the nfs_ip_paranoia sysctl serve as the default connection 1008 * or no-connection mode for those protocols that support 1009 * no-connection mode (the flag will be cleared later for protocols 1010 * that do not support no-connection mode). This will allow a client 1011 * to receive replies from a different IP then the request was 1012 * sent to. Note: default value for nfs_ip_paranoia is 1 (paranoid), 1013 * not 0. 1014 */ 1015 if (nfs_ip_paranoia == 0) 1016 args.flags |= NFSMNT_NOCONN; 1017 1018 if (has_nfs_args_opt != 0) { 1019 /* 1020 * In the 'nfs_args' case, the pointers in the args 1021 * structure are in userland - we copy them in here. 1022 */ 1023 if (args.fhsize < 0 || args.fhsize > NFSX_V3FHMAX) { 1024 vfs_mount_error(mp, "Bad file handle"); 1025 error = EINVAL; 1026 goto out; 1027 } 1028 error = copyin((caddr_t)args.fh, (caddr_t)nfh, 1029 args.fhsize); 1030 if (error != 0) 1031 goto out; 1032 error = copyinstr(args.hostname, hst, MNAMELEN - 1, &hstlen); 1033 if (error != 0) 1034 goto out; 1035 bzero(&hst[hstlen], MNAMELEN - hstlen); 1036 args.hostname = hst; 1037 /* sockargs() call must be after above copyin() calls */ 1038 error = getsockaddr(&nam, (caddr_t)args.addr, 1039 args.addrlen); 1040 if (error != 0) 1041 goto out; 1042 } else { 1043 if (vfs_getopt(mp->mnt_optnew, "fh", (void **)&args.fh, 1044 &args.fhsize) == 0) { 1045 if (args.fhsize < 0 || args.fhsize > NFSX_FHMAX) { 1046 vfs_mount_error(mp, "Bad file handle"); 1047 error = EINVAL; 1048 goto out; 1049 } 1050 bcopy(args.fh, nfh, args.fhsize); 1051 } else { 1052 args.fhsize = 0; 1053 } 1054 (void) vfs_getopt(mp->mnt_optnew, "hostname", 1055 (void **)&args.hostname, &len); 1056 if (args.hostname == NULL) { 1057 vfs_mount_error(mp, "Invalid hostname"); 1058 error = EINVAL; 1059 goto out; 1060 } 1061 bcopy(args.hostname, hst, MNAMELEN); 1062 hst[MNAMELEN - 1] = '\0'; 1063 } 1064 1065 if (vfs_getopt(mp->mnt_optnew, "principal", (void **)&name, NULL) == 0) 1066 strlcpy(srvkrbname, name, sizeof (srvkrbname)); 1067 else 1068 snprintf(srvkrbname, sizeof (srvkrbname), "nfs@%s", hst); 1069 srvkrbnamelen = strlen(srvkrbname); 1070 1071 if (vfs_getopt(mp->mnt_optnew, "gssname", (void **)&name, NULL) == 0) 1072 strlcpy(krbname, name, sizeof (krbname)); 1073 else 1074 krbname[0] = '\0'; 1075 krbnamelen = strlen(krbname); 1076 1077 if (vfs_getopt(mp->mnt_optnew, "dirpath", (void **)&name, NULL) == 0) 1078 strlcpy(dirpath, name, sizeof (dirpath)); 1079 else 1080 dirpath[0] = '\0'; 1081 dirlen = strlen(dirpath); 1082 1083 if (has_nfs_args_opt == 0) { 1084 if (vfs_getopt(mp->mnt_optnew, "addr", 1085 (void **)&args.addr, &args.addrlen) == 0) { 1086 if (args.addrlen > SOCK_MAXADDRLEN) { 1087 error = ENAMETOOLONG; 1088 goto out; 1089 } 1090 nam = malloc(args.addrlen, M_SONAME, M_WAITOK); 1091 bcopy(args.addr, nam, args.addrlen); 1092 nam->sa_len = args.addrlen; 1093 } else { 1094 vfs_mount_error(mp, "No server address"); 1095 error = EINVAL; 1096 goto out; 1097 } 1098 } 1099 1100 args.fh = nfh; 1101 error = mountnfs(&args, mp, nam, hst, krbname, krbnamelen, dirpath, 1102 dirlen, srvkrbname, srvkrbnamelen, &vp, td->td_ucred, td, 1103 negnametimeo); 1104 out: 1105 if (!error) { 1106 MNT_ILOCK(mp); 1107 mp->mnt_kern_flag |= (MNTK_MPSAFE|MNTK_LOOKUP_SHARED); 1108 MNT_IUNLOCK(mp); 1109 } 1110 return (error); 1111 } 1112 1113 1114 /* 1115 * VFS Operations. 1116 * 1117 * mount system call 1118 * It seems a bit dumb to copyinstr() the host and path here and then 1119 * bcopy() them in mountnfs(), but I wanted to detect errors before 1120 * doing the sockargs() call because sockargs() allocates an mbuf and 1121 * an error after that means that I have to release the mbuf. 1122 */ 1123 /* ARGSUSED */ 1124 static int 1125 nfs_cmount(struct mntarg *ma, void *data, int flags) 1126 { 1127 int error; 1128 struct nfs_args args; 1129 1130 error = copyin(data, &args, sizeof (struct nfs_args)); 1131 if (error) 1132 return error; 1133 1134 ma = mount_arg(ma, "nfs_args", &args, sizeof args); 1135 1136 error = kernel_mount(ma, flags); 1137 return (error); 1138 } 1139 1140 /* 1141 * Common code for mount and mountroot 1142 */ 1143 static int 1144 mountnfs(struct nfs_args *argp, struct mount *mp, struct sockaddr *nam, 1145 char *hst, u_char *krbname, int krbnamelen, u_char *dirpath, int dirlen, 1146 u_char *srvkrbname, int srvkrbnamelen, struct vnode **vpp, 1147 struct ucred *cred, struct thread *td, int negnametimeo) 1148 { 1149 struct nfsmount *nmp; 1150 struct nfsnode *np; 1151 int error, trycnt, ret; 1152 struct nfsvattr nfsva; 1153 static u_int64_t clval = 0; 1154 1155 if (mp->mnt_flag & MNT_UPDATE) { 1156 nmp = VFSTONFS(mp); 1157 printf("%s: MNT_UPDATE is no longer handled here\n", __func__); 1158 FREE(nam, M_SONAME); 1159 return (0); 1160 } else { 1161 MALLOC(nmp, struct nfsmount *, sizeof (struct nfsmount) + 1162 krbnamelen + dirlen + srvkrbnamelen + 2, 1163 M_NEWNFSMNT, M_WAITOK | M_ZERO); 1164 TAILQ_INIT(&nmp->nm_bufq); 1165 if (clval == 0) 1166 clval = (u_int64_t)nfsboottime.tv_sec; 1167 nmp->nm_clval = clval++; 1168 nmp->nm_krbnamelen = krbnamelen; 1169 nmp->nm_dirpathlen = dirlen; 1170 nmp->nm_srvkrbnamelen = srvkrbnamelen; 1171 if (td->td_ucred->cr_uid != (uid_t)0) { 1172 /* 1173 * nm_uid is used to get KerberosV credentials for 1174 * the nfsv4 state handling operations if there is 1175 * no host based principal set. Use the uid of 1176 * this user if not root, since they are doing the 1177 * mount. I don't think setting this for root will 1178 * work, since root normally does not have user 1179 * credentials in a credentials cache. 1180 */ 1181 nmp->nm_uid = td->td_ucred->cr_uid; 1182 } else { 1183 /* 1184 * Just set to -1, so it won't be used. 1185 */ 1186 nmp->nm_uid = (uid_t)-1; 1187 } 1188 1189 /* Copy and null terminate all the names */ 1190 if (nmp->nm_krbnamelen > 0) { 1191 bcopy(krbname, nmp->nm_krbname, nmp->nm_krbnamelen); 1192 nmp->nm_name[nmp->nm_krbnamelen] = '\0'; 1193 } 1194 if (nmp->nm_dirpathlen > 0) { 1195 bcopy(dirpath, NFSMNT_DIRPATH(nmp), 1196 nmp->nm_dirpathlen); 1197 nmp->nm_name[nmp->nm_krbnamelen + nmp->nm_dirpathlen 1198 + 1] = '\0'; 1199 } 1200 if (nmp->nm_srvkrbnamelen > 0) { 1201 bcopy(srvkrbname, NFSMNT_SRVKRBNAME(nmp), 1202 nmp->nm_srvkrbnamelen); 1203 nmp->nm_name[nmp->nm_krbnamelen + nmp->nm_dirpathlen 1204 + nmp->nm_srvkrbnamelen + 2] = '\0'; 1205 } 1206 nmp->nm_sockreq.nr_cred = crhold(cred); 1207 mtx_init(&nmp->nm_sockreq.nr_mtx, "nfssock", NULL, MTX_DEF); 1208 mp->mnt_data = nmp; 1209 nmp->nm_getinfo = nfs_getnlminfo; 1210 nmp->nm_vinvalbuf = ncl_vinvalbuf; 1211 } 1212 vfs_getnewfsid(mp); 1213 nmp->nm_mountp = mp; 1214 mtx_init(&nmp->nm_mtx, "NFSmount lock", NULL, MTX_DEF | MTX_DUPOK); 1215 nmp->nm_negnametimeo = negnametimeo; 1216 1217 nfs_decode_args(mp, nmp, argp, hst, cred, td); 1218 1219 /* 1220 * V2 can only handle 32 bit filesizes. A 4GB-1 limit may be too 1221 * high, depending on whether we end up with negative offsets in 1222 * the client or server somewhere. 2GB-1 may be safer. 1223 * 1224 * For V3, ncl_fsinfo will adjust this as necessary. Assume maximum 1225 * that we can handle until we find out otherwise. 1226 * XXX Our "safe" limit on the client is what we can store in our 1227 * buffer cache using signed(!) block numbers. 1228 */ 1229 if ((argp->flags & (NFSMNT_NFSV3 | NFSMNT_NFSV4)) == 0) 1230 nmp->nm_maxfilesize = 0xffffffffLL; 1231 else 1232 nmp->nm_maxfilesize = OFF_MAX; 1233 1234 nmp->nm_timeo = NFS_TIMEO; 1235 nmp->nm_retry = NFS_RETRANS; 1236 if ((argp->flags & (NFSMNT_NFSV3 | NFSMNT_NFSV4)) == 0) { 1237 nmp->nm_wsize = NFS_WSIZE; 1238 nmp->nm_rsize = NFS_RSIZE; 1239 nmp->nm_readdirsize = NFS_READDIRSIZE; 1240 } 1241 nmp->nm_wcommitsize = hibufspace / (desiredvnodes / 1000); 1242 nmp->nm_numgrps = NFS_MAXGRPS; 1243 nmp->nm_readahead = NFS_DEFRAHEAD; 1244 nmp->nm_tprintf_delay = nfs_tprintf_delay; 1245 if (nmp->nm_tprintf_delay < 0) 1246 nmp->nm_tprintf_delay = 0; 1247 nmp->nm_tprintf_initial_delay = nfs_tprintf_initial_delay; 1248 if (nmp->nm_tprintf_initial_delay < 0) 1249 nmp->nm_tprintf_initial_delay = 0; 1250 nmp->nm_fhsize = argp->fhsize; 1251 if (nmp->nm_fhsize > 0) 1252 bcopy((caddr_t)argp->fh, (caddr_t)nmp->nm_fh, argp->fhsize); 1253 bcopy(hst, mp->mnt_stat.f_mntfromname, MNAMELEN); 1254 nmp->nm_nam = nam; 1255 /* Set up the sockets and per-host congestion */ 1256 nmp->nm_sotype = argp->sotype; 1257 nmp->nm_soproto = argp->proto; 1258 nmp->nm_sockreq.nr_prog = NFS_PROG; 1259 if ((argp->flags & NFSMNT_NFSV4)) 1260 nmp->nm_sockreq.nr_vers = NFS_VER4; 1261 else if ((argp->flags & NFSMNT_NFSV3)) 1262 nmp->nm_sockreq.nr_vers = NFS_VER3; 1263 else 1264 nmp->nm_sockreq.nr_vers = NFS_VER2; 1265 1266 1267 if ((error = newnfs_connect(nmp, &nmp->nm_sockreq, cred, td, 0))) 1268 goto bad; 1269 1270 /* 1271 * A reference count is needed on the nfsnode representing the 1272 * remote root. If this object is not persistent, then backward 1273 * traversals of the mount point (i.e. "..") will not work if 1274 * the nfsnode gets flushed out of the cache. Ufs does not have 1275 * this problem, because one can identify root inodes by their 1276 * number == ROOTINO (2). 1277 */ 1278 if (nmp->nm_fhsize == 0 && (nmp->nm_flag & NFSMNT_NFSV4) && 1279 nmp->nm_dirpathlen > 0) { 1280 /* 1281 * If the fhsize on the mount point == 0 for V4, the mount 1282 * path needs to be looked up. 1283 */ 1284 trycnt = 3; 1285 do { 1286 error = nfsrpc_getdirpath(nmp, NFSMNT_DIRPATH(nmp), 1287 cred, td); 1288 if (error) 1289 (void) nfs_catnap(PZERO, error, "nfsgetdirp"); 1290 } while (error && --trycnt > 0); 1291 if (error) { 1292 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0); 1293 goto bad; 1294 } 1295 } 1296 if (nmp->nm_fhsize > 0) { 1297 /* 1298 * Set f_iosize to NFS_DIRBLKSIZ so that bo_bsize gets set 1299 * non-zero for the root vnode. f_iosize will be set correctly 1300 * by nfs_statfs() before any I/O occurs. 1301 */ 1302 mp->mnt_stat.f_iosize = NFS_DIRBLKSIZ; 1303 error = ncl_nget(mp, nmp->nm_fh, nmp->nm_fhsize, &np, 1304 LK_EXCLUSIVE); 1305 if (error) 1306 goto bad; 1307 *vpp = NFSTOV(np); 1308 1309 /* 1310 * Get file attributes and transfer parameters for the 1311 * mountpoint. This has the side effect of filling in 1312 * (*vpp)->v_type with the correct value. 1313 */ 1314 ret = nfsrpc_getattrnovp(nmp, nmp->nm_fh, nmp->nm_fhsize, 1, 1315 cred, td, &nfsva, NULL); 1316 if (ret) { 1317 /* 1318 * Just set default values to get things going. 1319 */ 1320 NFSBZERO((caddr_t)&nfsva, sizeof (struct nfsvattr)); 1321 nfsva.na_vattr.va_type = VDIR; 1322 nfsva.na_vattr.va_mode = 0777; 1323 nfsva.na_vattr.va_nlink = 100; 1324 nfsva.na_vattr.va_uid = (uid_t)0; 1325 nfsva.na_vattr.va_gid = (gid_t)0; 1326 nfsva.na_vattr.va_fileid = 2; 1327 nfsva.na_vattr.va_gen = 1; 1328 nfsva.na_vattr.va_blocksize = NFS_FABLKSIZE; 1329 nfsva.na_vattr.va_size = 512 * 1024; 1330 } 1331 (void) nfscl_loadattrcache(vpp, &nfsva, NULL, NULL, 0, 1); 1332 if (argp->flags & NFSMNT_NFSV3) 1333 ncl_fsinfo(nmp, *vpp, cred, td); 1334 1335 /* Mark if the mount point supports NFSv4 ACLs. */ 1336 if ((argp->flags & NFSMNT_NFSV4) != 0 && nfsrv_useacl != 0 && 1337 ret == 0 && 1338 NFSISSET_ATTRBIT(&nfsva.na_suppattr, NFSATTRBIT_ACL)) { 1339 MNT_ILOCK(mp); 1340 mp->mnt_flag |= MNT_NFS4ACLS; 1341 MNT_IUNLOCK(mp); 1342 } 1343 1344 /* 1345 * Lose the lock but keep the ref. 1346 */ 1347 NFSVOPUNLOCK(*vpp, 0); 1348 return (0); 1349 } 1350 error = EIO; 1351 1352 bad: 1353 newnfs_disconnect(&nmp->nm_sockreq); 1354 crfree(nmp->nm_sockreq.nr_cred); 1355 mtx_destroy(&nmp->nm_sockreq.nr_mtx); 1356 mtx_destroy(&nmp->nm_mtx); 1357 FREE(nmp, M_NEWNFSMNT); 1358 FREE(nam, M_SONAME); 1359 return (error); 1360 } 1361 1362 /* 1363 * unmount system call 1364 */ 1365 static int 1366 nfs_unmount(struct mount *mp, int mntflags) 1367 { 1368 struct thread *td; 1369 struct nfsmount *nmp; 1370 int error, flags = 0, trycnt = 0; 1371 1372 td = curthread; 1373 1374 if (mntflags & MNT_FORCE) 1375 flags |= FORCECLOSE; 1376 nmp = VFSTONFS(mp); 1377 /* 1378 * Goes something like this.. 1379 * - Call vflush() to clear out vnodes for this filesystem 1380 * - Close the socket 1381 * - Free up the data structures 1382 */ 1383 /* In the forced case, cancel any outstanding requests. */ 1384 if (mntflags & MNT_FORCE) { 1385 error = newnfs_nmcancelreqs(nmp); 1386 if (error) 1387 goto out; 1388 /* For a forced close, get rid of the renew thread now */ 1389 nfscl_umount(nmp, td); 1390 } 1391 /* We hold 1 extra ref on the root vnode; see comment in mountnfs(). */ 1392 do { 1393 error = vflush(mp, 1, flags, td); 1394 if ((mntflags & MNT_FORCE) && error != 0 && ++trycnt < 30) 1395 (void) nfs_catnap(PSOCK, error, "newndm"); 1396 } while ((mntflags & MNT_FORCE) && error != 0 && trycnt < 30); 1397 if (error) 1398 goto out; 1399 1400 /* 1401 * We are now committed to the unmount. 1402 */ 1403 if ((mntflags & MNT_FORCE) == 0) 1404 nfscl_umount(nmp, td); 1405 newnfs_disconnect(&nmp->nm_sockreq); 1406 crfree(nmp->nm_sockreq.nr_cred); 1407 FREE(nmp->nm_nam, M_SONAME); 1408 1409 mtx_destroy(&nmp->nm_sockreq.nr_mtx); 1410 mtx_destroy(&nmp->nm_mtx); 1411 FREE(nmp, M_NEWNFSMNT); 1412 out: 1413 return (error); 1414 } 1415 1416 /* 1417 * Return root of a filesystem 1418 */ 1419 static int 1420 nfs_root(struct mount *mp, int flags, struct vnode **vpp) 1421 { 1422 struct vnode *vp; 1423 struct nfsmount *nmp; 1424 struct nfsnode *np; 1425 int error; 1426 1427 nmp = VFSTONFS(mp); 1428 error = ncl_nget(mp, nmp->nm_fh, nmp->nm_fhsize, &np, flags); 1429 if (error) 1430 return error; 1431 vp = NFSTOV(np); 1432 /* 1433 * Get transfer parameters and attributes for root vnode once. 1434 */ 1435 mtx_lock(&nmp->nm_mtx); 1436 if (NFSHASNFSV3(nmp) && !NFSHASGOTFSINFO(nmp)) { 1437 mtx_unlock(&nmp->nm_mtx); 1438 ncl_fsinfo(nmp, vp, curthread->td_ucred, curthread); 1439 } else 1440 mtx_unlock(&nmp->nm_mtx); 1441 if (vp->v_type == VNON) 1442 vp->v_type = VDIR; 1443 vp->v_vflag |= VV_ROOT; 1444 *vpp = vp; 1445 return (0); 1446 } 1447 1448 /* 1449 * Flush out the buffer cache 1450 */ 1451 /* ARGSUSED */ 1452 static int 1453 nfs_sync(struct mount *mp, int waitfor) 1454 { 1455 struct vnode *vp, *mvp; 1456 struct thread *td; 1457 int error, allerror = 0; 1458 1459 td = curthread; 1460 1461 MNT_ILOCK(mp); 1462 /* 1463 * If a forced dismount is in progress, return from here so that 1464 * the umount(2) syscall doesn't get stuck in VFS_SYNC() before 1465 * calling VFS_UNMOUNT(). 1466 */ 1467 if ((mp->mnt_kern_flag & MNTK_UNMOUNTF) != 0) { 1468 MNT_IUNLOCK(mp); 1469 return (EBADF); 1470 } 1471 1472 /* 1473 * Force stale buffer cache information to be flushed. 1474 */ 1475 loop: 1476 MNT_VNODE_FOREACH(vp, mp, mvp) { 1477 VI_LOCK(vp); 1478 MNT_IUNLOCK(mp); 1479 /* XXX Racy bv_cnt check. */ 1480 if (NFSVOPISLOCKED(vp) || vp->v_bufobj.bo_dirty.bv_cnt == 0 || 1481 waitfor == MNT_LAZY) { 1482 VI_UNLOCK(vp); 1483 MNT_ILOCK(mp); 1484 continue; 1485 } 1486 if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK, td)) { 1487 MNT_ILOCK(mp); 1488 MNT_VNODE_FOREACH_ABORT_ILOCKED(mp, mvp); 1489 goto loop; 1490 } 1491 error = VOP_FSYNC(vp, waitfor, td); 1492 if (error) 1493 allerror = error; 1494 NFSVOPUNLOCK(vp, 0); 1495 vrele(vp); 1496 1497 MNT_ILOCK(mp); 1498 } 1499 MNT_IUNLOCK(mp); 1500 return (allerror); 1501 } 1502 1503 static int 1504 nfs_sysctl(struct mount *mp, fsctlop_t op, struct sysctl_req *req) 1505 { 1506 struct nfsmount *nmp = VFSTONFS(mp); 1507 struct vfsquery vq; 1508 int error; 1509 1510 bzero(&vq, sizeof(vq)); 1511 switch (op) { 1512 #if 0 1513 case VFS_CTL_NOLOCKS: 1514 val = (nmp->nm_flag & NFSMNT_NOLOCKS) ? 1 : 0; 1515 if (req->oldptr != NULL) { 1516 error = SYSCTL_OUT(req, &val, sizeof(val)); 1517 if (error) 1518 return (error); 1519 } 1520 if (req->newptr != NULL) { 1521 error = SYSCTL_IN(req, &val, sizeof(val)); 1522 if (error) 1523 return (error); 1524 if (val) 1525 nmp->nm_flag |= NFSMNT_NOLOCKS; 1526 else 1527 nmp->nm_flag &= ~NFSMNT_NOLOCKS; 1528 } 1529 break; 1530 #endif 1531 case VFS_CTL_QUERY: 1532 mtx_lock(&nmp->nm_mtx); 1533 if (nmp->nm_state & NFSSTA_TIMEO) 1534 vq.vq_flags |= VQ_NOTRESP; 1535 mtx_unlock(&nmp->nm_mtx); 1536 #if 0 1537 if (!(nmp->nm_flag & NFSMNT_NOLOCKS) && 1538 (nmp->nm_state & NFSSTA_LOCKTIMEO)) 1539 vq.vq_flags |= VQ_NOTRESPLOCK; 1540 #endif 1541 error = SYSCTL_OUT(req, &vq, sizeof(vq)); 1542 break; 1543 case VFS_CTL_TIMEO: 1544 if (req->oldptr != NULL) { 1545 error = SYSCTL_OUT(req, &nmp->nm_tprintf_initial_delay, 1546 sizeof(nmp->nm_tprintf_initial_delay)); 1547 if (error) 1548 return (error); 1549 } 1550 if (req->newptr != NULL) { 1551 error = vfs_suser(mp, req->td); 1552 if (error) 1553 return (error); 1554 error = SYSCTL_IN(req, &nmp->nm_tprintf_initial_delay, 1555 sizeof(nmp->nm_tprintf_initial_delay)); 1556 if (error) 1557 return (error); 1558 if (nmp->nm_tprintf_initial_delay < 0) 1559 nmp->nm_tprintf_initial_delay = 0; 1560 } 1561 break; 1562 default: 1563 return (ENOTSUP); 1564 } 1565 return (0); 1566 } 1567 1568 /* 1569 * Extract the information needed by the nlm from the nfs vnode. 1570 */ 1571 static void 1572 nfs_getnlminfo(struct vnode *vp, uint8_t *fhp, size_t *fhlenp, 1573 struct sockaddr_storage *sp, int *is_v3p, off_t *sizep, 1574 struct timeval *timeop) 1575 { 1576 struct nfsmount *nmp; 1577 struct nfsnode *np = VTONFS(vp); 1578 1579 nmp = VFSTONFS(vp->v_mount); 1580 if (fhlenp != NULL) 1581 *fhlenp = (size_t)np->n_fhp->nfh_len; 1582 if (fhp != NULL) 1583 bcopy(np->n_fhp->nfh_fh, fhp, np->n_fhp->nfh_len); 1584 if (sp != NULL) 1585 bcopy(nmp->nm_nam, sp, min(nmp->nm_nam->sa_len, sizeof(*sp))); 1586 if (is_v3p != NULL) 1587 *is_v3p = NFS_ISV3(vp); 1588 if (sizep != NULL) 1589 *sizep = np->n_size; 1590 if (timeop != NULL) { 1591 timeop->tv_sec = nmp->nm_timeo / NFS_HZ; 1592 timeop->tv_usec = (nmp->nm_timeo % NFS_HZ) * (1000000 / NFS_HZ); 1593 } 1594 } 1595
Cache object: 531947092fd272f55363565c206d2762
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]