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sys/fs/nfsclient/nfs_clvfsops.c
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1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1989, 1993, 1995 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Rick Macklem at The University of Guelph. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * from nfs_vfsops.c 8.12 (Berkeley) 5/20/95 35 */ 36 37 #include <sys/cdefs.h> 38 __FBSDID("$FreeBSD: releng/12.0/sys/fs/nfsclient/nfs_clvfsops.c 335012 2018-06-12 19:36:32Z rmacklem $"); 39 40 41 #include "opt_bootp.h" 42 #include "opt_nfsroot.h" 43 44 #include <sys/param.h> 45 #include <sys/systm.h> 46 #include <sys/kernel.h> 47 #include <sys/bio.h> 48 #include <sys/buf.h> 49 #include <sys/clock.h> 50 #include <sys/jail.h> 51 #include <sys/limits.h> 52 #include <sys/lock.h> 53 #include <sys/malloc.h> 54 #include <sys/mbuf.h> 55 #include <sys/module.h> 56 #include <sys/mount.h> 57 #include <sys/proc.h> 58 #include <sys/socket.h> 59 #include <sys/socketvar.h> 60 #include <sys/sockio.h> 61 #include <sys/sysctl.h> 62 #include <sys/vnode.h> 63 #include <sys/signalvar.h> 64 65 #include <vm/vm.h> 66 #include <vm/vm_extern.h> 67 #include <vm/uma.h> 68 69 #include <net/if.h> 70 #include <net/route.h> 71 #include <netinet/in.h> 72 73 #include <fs/nfs/nfsport.h> 74 #include <fs/nfsclient/nfsnode.h> 75 #include <fs/nfsclient/nfsmount.h> 76 #include <fs/nfsclient/nfs.h> 77 #include <nfs/nfsdiskless.h> 78 79 FEATURE(nfscl, "NFSv4 client"); 80 81 extern int nfscl_ticks; 82 extern struct timeval nfsboottime; 83 extern int nfsrv_useacl; 84 extern int nfscl_debuglevel; 85 extern enum nfsiod_state ncl_iodwant[NFS_MAXASYNCDAEMON]; 86 extern struct nfsmount *ncl_iodmount[NFS_MAXASYNCDAEMON]; 87 extern struct mtx ncl_iod_mutex; 88 NFSCLSTATEMUTEX; 89 extern struct mtx nfsrv_dslock_mtx; 90 91 MALLOC_DEFINE(M_NEWNFSREQ, "newnfsclient_req", "NFS request header"); 92 MALLOC_DEFINE(M_NEWNFSMNT, "newnfsmnt", "NFS mount struct"); 93 94 SYSCTL_DECL(_vfs_nfs); 95 static int nfs_ip_paranoia = 1; 96 SYSCTL_INT(_vfs_nfs, OID_AUTO, nfs_ip_paranoia, CTLFLAG_RW, 97 &nfs_ip_paranoia, 0, ""); 98 static int nfs_tprintf_initial_delay = NFS_TPRINTF_INITIAL_DELAY; 99 SYSCTL_INT(_vfs_nfs, NFS_TPRINTF_INITIAL_DELAY, 100 downdelayinitial, CTLFLAG_RW, &nfs_tprintf_initial_delay, 0, ""); 101 /* how long between console messages "nfs server foo not responding" */ 102 static int nfs_tprintf_delay = NFS_TPRINTF_DELAY; 103 SYSCTL_INT(_vfs_nfs, NFS_TPRINTF_DELAY, 104 downdelayinterval, CTLFLAG_RW, &nfs_tprintf_delay, 0, ""); 105 #ifdef NFS_DEBUG 106 int nfs_debug; 107 SYSCTL_INT(_vfs_nfs, OID_AUTO, debug, CTLFLAG_RW, &nfs_debug, 0, 108 "Toggle debug flag"); 109 #endif 110 111 static int nfs_mountroot(struct mount *); 112 static void nfs_sec_name(char *, int *); 113 static void nfs_decode_args(struct mount *mp, struct nfsmount *nmp, 114 struct nfs_args *argp, const char *, struct ucred *, 115 struct thread *); 116 static int mountnfs(struct nfs_args *, struct mount *, 117 struct sockaddr *, char *, u_char *, int, u_char *, int, 118 u_char *, int, struct vnode **, struct ucred *, 119 struct thread *, int, int, int); 120 static void nfs_getnlminfo(struct vnode *, uint8_t *, size_t *, 121 struct sockaddr_storage *, int *, off_t *, 122 struct timeval *); 123 static vfs_mount_t nfs_mount; 124 static vfs_cmount_t nfs_cmount; 125 static vfs_unmount_t nfs_unmount; 126 static vfs_root_t nfs_root; 127 static vfs_statfs_t nfs_statfs; 128 static vfs_sync_t nfs_sync; 129 static vfs_sysctl_t nfs_sysctl; 130 static vfs_purge_t nfs_purge; 131 132 /* 133 * nfs vfs operations. 134 */ 135 static struct vfsops nfs_vfsops = { 136 .vfs_init = ncl_init, 137 .vfs_mount = nfs_mount, 138 .vfs_cmount = nfs_cmount, 139 .vfs_root = nfs_root, 140 .vfs_statfs = nfs_statfs, 141 .vfs_sync = nfs_sync, 142 .vfs_uninit = ncl_uninit, 143 .vfs_unmount = nfs_unmount, 144 .vfs_sysctl = nfs_sysctl, 145 .vfs_purge = nfs_purge, 146 }; 147 VFS_SET(nfs_vfsops, nfs, VFCF_NETWORK | VFCF_SBDRY); 148 149 /* So that loader and kldload(2) can find us, wherever we are.. */ 150 MODULE_VERSION(nfs, 1); 151 MODULE_DEPEND(nfs, nfscommon, 1, 1, 1); 152 MODULE_DEPEND(nfs, krpc, 1, 1, 1); 153 MODULE_DEPEND(nfs, nfssvc, 1, 1, 1); 154 MODULE_DEPEND(nfs, nfslock, 1, 1, 1); 155 156 /* 157 * This structure is now defined in sys/nfs/nfs_diskless.c so that it 158 * can be shared by both NFS clients. It is declared here so that it 159 * will be defined for kernels built without NFS_ROOT, although it 160 * isn't used in that case. 161 */ 162 #if !defined(NFS_ROOT) 163 struct nfs_diskless nfs_diskless = { { { 0 } } }; 164 struct nfsv3_diskless nfsv3_diskless = { { { 0 } } }; 165 int nfs_diskless_valid = 0; 166 #endif 167 168 SYSCTL_INT(_vfs_nfs, OID_AUTO, diskless_valid, CTLFLAG_RD, 169 &nfs_diskless_valid, 0, 170 "Has the diskless struct been filled correctly"); 171 172 SYSCTL_STRING(_vfs_nfs, OID_AUTO, diskless_rootpath, CTLFLAG_RD, 173 nfsv3_diskless.root_hostnam, 0, "Path to nfs root"); 174 175 SYSCTL_OPAQUE(_vfs_nfs, OID_AUTO, diskless_rootaddr, CTLFLAG_RD, 176 &nfsv3_diskless.root_saddr, sizeof(nfsv3_diskless.root_saddr), 177 "%Ssockaddr_in", "Diskless root nfs address"); 178 179 180 void newnfsargs_ntoh(struct nfs_args *); 181 static int nfs_mountdiskless(char *, 182 struct sockaddr_in *, struct nfs_args *, 183 struct thread *, struct vnode **, struct mount *); 184 static void nfs_convert_diskless(void); 185 static void nfs_convert_oargs(struct nfs_args *args, 186 struct onfs_args *oargs); 187 188 int 189 newnfs_iosize(struct nfsmount *nmp) 190 { 191 int iosize, maxio; 192 193 /* First, set the upper limit for iosize */ 194 if (nmp->nm_flag & NFSMNT_NFSV4) { 195 maxio = NFS_MAXBSIZE; 196 } else if (nmp->nm_flag & NFSMNT_NFSV3) { 197 if (nmp->nm_sotype == SOCK_DGRAM) 198 maxio = NFS_MAXDGRAMDATA; 199 else 200 maxio = NFS_MAXBSIZE; 201 } else { 202 maxio = NFS_V2MAXDATA; 203 } 204 if (nmp->nm_rsize > maxio || nmp->nm_rsize == 0) 205 nmp->nm_rsize = maxio; 206 if (nmp->nm_rsize > NFS_MAXBSIZE) 207 nmp->nm_rsize = NFS_MAXBSIZE; 208 if (nmp->nm_readdirsize > maxio || nmp->nm_readdirsize == 0) 209 nmp->nm_readdirsize = maxio; 210 if (nmp->nm_readdirsize > nmp->nm_rsize) 211 nmp->nm_readdirsize = nmp->nm_rsize; 212 if (nmp->nm_wsize > maxio || nmp->nm_wsize == 0) 213 nmp->nm_wsize = maxio; 214 if (nmp->nm_wsize > NFS_MAXBSIZE) 215 nmp->nm_wsize = NFS_MAXBSIZE; 216 217 /* 218 * Calculate the size used for io buffers. Use the larger 219 * of the two sizes to minimise nfs requests but make sure 220 * that it is at least one VM page to avoid wasting buffer 221 * space. It must also be at least NFS_DIRBLKSIZ, since 222 * that is the buffer size used for directories. 223 */ 224 iosize = imax(nmp->nm_rsize, nmp->nm_wsize); 225 iosize = imax(iosize, PAGE_SIZE); 226 iosize = imax(iosize, NFS_DIRBLKSIZ); 227 nmp->nm_mountp->mnt_stat.f_iosize = iosize; 228 return (iosize); 229 } 230 231 static void 232 nfs_convert_oargs(struct nfs_args *args, struct onfs_args *oargs) 233 { 234 235 args->version = NFS_ARGSVERSION; 236 args->addr = oargs->addr; 237 args->addrlen = oargs->addrlen; 238 args->sotype = oargs->sotype; 239 args->proto = oargs->proto; 240 args->fh = oargs->fh; 241 args->fhsize = oargs->fhsize; 242 args->flags = oargs->flags; 243 args->wsize = oargs->wsize; 244 args->rsize = oargs->rsize; 245 args->readdirsize = oargs->readdirsize; 246 args->timeo = oargs->timeo; 247 args->retrans = oargs->retrans; 248 args->readahead = oargs->readahead; 249 args->hostname = oargs->hostname; 250 } 251 252 static void 253 nfs_convert_diskless(void) 254 { 255 256 bcopy(&nfs_diskless.myif, &nfsv3_diskless.myif, 257 sizeof(struct ifaliasreq)); 258 bcopy(&nfs_diskless.mygateway, &nfsv3_diskless.mygateway, 259 sizeof(struct sockaddr_in)); 260 nfs_convert_oargs(&nfsv3_diskless.root_args,&nfs_diskless.root_args); 261 if (nfsv3_diskless.root_args.flags & NFSMNT_NFSV3) { 262 nfsv3_diskless.root_fhsize = NFSX_MYFH; 263 bcopy(nfs_diskless.root_fh, nfsv3_diskless.root_fh, NFSX_MYFH); 264 } else { 265 nfsv3_diskless.root_fhsize = NFSX_V2FH; 266 bcopy(nfs_diskless.root_fh, nfsv3_diskless.root_fh, NFSX_V2FH); 267 } 268 bcopy(&nfs_diskless.root_saddr,&nfsv3_diskless.root_saddr, 269 sizeof(struct sockaddr_in)); 270 bcopy(nfs_diskless.root_hostnam, nfsv3_diskless.root_hostnam, MNAMELEN); 271 nfsv3_diskless.root_time = nfs_diskless.root_time; 272 bcopy(nfs_diskless.my_hostnam, nfsv3_diskless.my_hostnam, 273 MAXHOSTNAMELEN); 274 nfs_diskless_valid = 3; 275 } 276 277 /* 278 * nfs statfs call 279 */ 280 static int 281 nfs_statfs(struct mount *mp, struct statfs *sbp) 282 { 283 struct vnode *vp; 284 struct thread *td; 285 struct nfsmount *nmp = VFSTONFS(mp); 286 struct nfsvattr nfsva; 287 struct nfsfsinfo fs; 288 struct nfsstatfs sb; 289 int error = 0, attrflag, gotfsinfo = 0, ret; 290 struct nfsnode *np; 291 292 td = curthread; 293 294 error = vfs_busy(mp, MBF_NOWAIT); 295 if (error) 296 return (error); 297 error = ncl_nget(mp, nmp->nm_fh, nmp->nm_fhsize, &np, LK_EXCLUSIVE); 298 if (error) { 299 vfs_unbusy(mp); 300 return (error); 301 } 302 vp = NFSTOV(np); 303 mtx_lock(&nmp->nm_mtx); 304 if (NFSHASNFSV3(nmp) && !NFSHASGOTFSINFO(nmp)) { 305 mtx_unlock(&nmp->nm_mtx); 306 error = nfsrpc_fsinfo(vp, &fs, td->td_ucred, td, &nfsva, 307 &attrflag, NULL); 308 if (!error) 309 gotfsinfo = 1; 310 } else 311 mtx_unlock(&nmp->nm_mtx); 312 if (!error) 313 error = nfsrpc_statfs(vp, &sb, &fs, td->td_ucred, td, &nfsva, 314 &attrflag, NULL); 315 if (error != 0) 316 NFSCL_DEBUG(2, "statfs=%d\n", error); 317 if (attrflag == 0) { 318 ret = nfsrpc_getattrnovp(nmp, nmp->nm_fh, nmp->nm_fhsize, 1, 319 td->td_ucred, td, &nfsva, NULL, NULL); 320 if (ret) { 321 /* 322 * Just set default values to get things going. 323 */ 324 NFSBZERO((caddr_t)&nfsva, sizeof (struct nfsvattr)); 325 nfsva.na_vattr.va_type = VDIR; 326 nfsva.na_vattr.va_mode = 0777; 327 nfsva.na_vattr.va_nlink = 100; 328 nfsva.na_vattr.va_uid = (uid_t)0; 329 nfsva.na_vattr.va_gid = (gid_t)0; 330 nfsva.na_vattr.va_fileid = 2; 331 nfsva.na_vattr.va_gen = 1; 332 nfsva.na_vattr.va_blocksize = NFS_FABLKSIZE; 333 nfsva.na_vattr.va_size = 512 * 1024; 334 } 335 } 336 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1); 337 if (!error) { 338 mtx_lock(&nmp->nm_mtx); 339 if (gotfsinfo || (nmp->nm_flag & NFSMNT_NFSV4)) 340 nfscl_loadfsinfo(nmp, &fs); 341 nfscl_loadsbinfo(nmp, &sb, sbp); 342 sbp->f_iosize = newnfs_iosize(nmp); 343 mtx_unlock(&nmp->nm_mtx); 344 if (sbp != &mp->mnt_stat) { 345 bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN); 346 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); 347 } 348 strncpy(&sbp->f_fstypename[0], mp->mnt_vfc->vfc_name, MFSNAMELEN); 349 } else if (NFS_ISV4(vp)) { 350 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0); 351 } 352 vput(vp); 353 vfs_unbusy(mp); 354 return (error); 355 } 356 357 /* 358 * nfs version 3 fsinfo rpc call 359 */ 360 int 361 ncl_fsinfo(struct nfsmount *nmp, struct vnode *vp, struct ucred *cred, 362 struct thread *td) 363 { 364 struct nfsfsinfo fs; 365 struct nfsvattr nfsva; 366 int error, attrflag; 367 368 error = nfsrpc_fsinfo(vp, &fs, cred, td, &nfsva, &attrflag, NULL); 369 if (!error) { 370 if (attrflag) 371 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 372 1); 373 mtx_lock(&nmp->nm_mtx); 374 nfscl_loadfsinfo(nmp, &fs); 375 mtx_unlock(&nmp->nm_mtx); 376 } 377 return (error); 378 } 379 380 /* 381 * Mount a remote root fs via. nfs. This depends on the info in the 382 * nfs_diskless structure that has been filled in properly by some primary 383 * bootstrap. 384 * It goes something like this: 385 * - do enough of "ifconfig" by calling ifioctl() so that the system 386 * can talk to the server 387 * - If nfs_diskless.mygateway is filled in, use that address as 388 * a default gateway. 389 * - build the rootfs mount point and call mountnfs() to do the rest. 390 * 391 * It is assumed to be safe to read, modify, and write the nfsv3_diskless 392 * structure, as well as other global NFS client variables here, as 393 * nfs_mountroot() will be called once in the boot before any other NFS 394 * client activity occurs. 395 */ 396 static int 397 nfs_mountroot(struct mount *mp) 398 { 399 struct thread *td = curthread; 400 struct nfsv3_diskless *nd = &nfsv3_diskless; 401 struct socket *so; 402 struct vnode *vp; 403 struct ifreq ir; 404 int error; 405 u_long l; 406 char buf[128]; 407 char *cp; 408 409 #if defined(BOOTP_NFSROOT) && defined(BOOTP) 410 bootpc_init(); /* use bootp to get nfs_diskless filled in */ 411 #elif defined(NFS_ROOT) 412 nfs_setup_diskless(); 413 #endif 414 415 if (nfs_diskless_valid == 0) 416 return (-1); 417 if (nfs_diskless_valid == 1) 418 nfs_convert_diskless(); 419 420 /* 421 * Do enough of ifconfig(8) so that the critical net interface can 422 * talk to the server. 423 */ 424 error = socreate(nd->myif.ifra_addr.sa_family, &so, nd->root_args.sotype, 0, 425 td->td_ucred, td); 426 if (error) 427 panic("nfs_mountroot: socreate(%04x): %d", 428 nd->myif.ifra_addr.sa_family, error); 429 430 #if 0 /* XXX Bad idea */ 431 /* 432 * We might not have been told the right interface, so we pass 433 * over the first ten interfaces of the same kind, until we get 434 * one of them configured. 435 */ 436 437 for (i = strlen(nd->myif.ifra_name) - 1; 438 nd->myif.ifra_name[i] >= '' && 439 nd->myif.ifra_name[i] <= '9'; 440 nd->myif.ifra_name[i] ++) { 441 error = ifioctl(so, SIOCAIFADDR, (caddr_t)&nd->myif, td); 442 if(!error) 443 break; 444 } 445 #endif 446 error = ifioctl(so, SIOCAIFADDR, (caddr_t)&nd->myif, td); 447 if (error) 448 panic("nfs_mountroot: SIOCAIFADDR: %d", error); 449 if ((cp = kern_getenv("boot.netif.mtu")) != NULL) { 450 ir.ifr_mtu = strtol(cp, NULL, 10); 451 bcopy(nd->myif.ifra_name, ir.ifr_name, IFNAMSIZ); 452 freeenv(cp); 453 error = ifioctl(so, SIOCSIFMTU, (caddr_t)&ir, td); 454 if (error) 455 printf("nfs_mountroot: SIOCSIFMTU: %d", error); 456 } 457 soclose(so); 458 459 /* 460 * If the gateway field is filled in, set it as the default route. 461 * Note that pxeboot will set a default route of 0 if the route 462 * is not set by the DHCP server. Check also for a value of 0 463 * to avoid panicking inappropriately in that situation. 464 */ 465 if (nd->mygateway.sin_len != 0 && 466 nd->mygateway.sin_addr.s_addr != 0) { 467 struct sockaddr_in mask, sin; 468 469 bzero((caddr_t)&mask, sizeof(mask)); 470 sin = mask; 471 sin.sin_family = AF_INET; 472 sin.sin_len = sizeof(sin); 473 /* XXX MRT use table 0 for this sort of thing */ 474 CURVNET_SET(TD_TO_VNET(td)); 475 error = rtrequest_fib(RTM_ADD, (struct sockaddr *)&sin, 476 (struct sockaddr *)&nd->mygateway, 477 (struct sockaddr *)&mask, 478 RTF_UP | RTF_GATEWAY, NULL, RT_DEFAULT_FIB); 479 CURVNET_RESTORE(); 480 if (error) 481 panic("nfs_mountroot: RTM_ADD: %d", error); 482 } 483 484 /* 485 * Create the rootfs mount point. 486 */ 487 nd->root_args.fh = nd->root_fh; 488 nd->root_args.fhsize = nd->root_fhsize; 489 l = ntohl(nd->root_saddr.sin_addr.s_addr); 490 snprintf(buf, sizeof(buf), "%ld.%ld.%ld.%ld:%s", 491 (l >> 24) & 0xff, (l >> 16) & 0xff, 492 (l >> 8) & 0xff, (l >> 0) & 0xff, nd->root_hostnam); 493 printf("NFS ROOT: %s\n", buf); 494 nd->root_args.hostname = buf; 495 if ((error = nfs_mountdiskless(buf, 496 &nd->root_saddr, &nd->root_args, td, &vp, mp)) != 0) { 497 return (error); 498 } 499 500 /* 501 * This is not really an nfs issue, but it is much easier to 502 * set hostname here and then let the "/etc/rc.xxx" files 503 * mount the right /var based upon its preset value. 504 */ 505 mtx_lock(&prison0.pr_mtx); 506 strlcpy(prison0.pr_hostname, nd->my_hostnam, 507 sizeof(prison0.pr_hostname)); 508 mtx_unlock(&prison0.pr_mtx); 509 inittodr(ntohl(nd->root_time)); 510 return (0); 511 } 512 513 /* 514 * Internal version of mount system call for diskless setup. 515 */ 516 static int 517 nfs_mountdiskless(char *path, 518 struct sockaddr_in *sin, struct nfs_args *args, struct thread *td, 519 struct vnode **vpp, struct mount *mp) 520 { 521 struct sockaddr *nam; 522 int dirlen, error; 523 char *dirpath; 524 525 /* 526 * Find the directory path in "path", which also has the server's 527 * name/ip address in it. 528 */ 529 dirpath = strchr(path, ':'); 530 if (dirpath != NULL) 531 dirlen = strlen(++dirpath); 532 else 533 dirlen = 0; 534 nam = sodupsockaddr((struct sockaddr *)sin, M_WAITOK); 535 if ((error = mountnfs(args, mp, nam, path, NULL, 0, dirpath, dirlen, 536 NULL, 0, vpp, td->td_ucred, td, NFS_DEFAULT_NAMETIMEO, 537 NFS_DEFAULT_NEGNAMETIMEO, 0)) != 0) { 538 printf("nfs_mountroot: mount %s on /: %d\n", path, error); 539 return (error); 540 } 541 return (0); 542 } 543 544 static void 545 nfs_sec_name(char *sec, int *flagsp) 546 { 547 if (!strcmp(sec, "krb5")) 548 *flagsp |= NFSMNT_KERB; 549 else if (!strcmp(sec, "krb5i")) 550 *flagsp |= (NFSMNT_KERB | NFSMNT_INTEGRITY); 551 else if (!strcmp(sec, "krb5p")) 552 *flagsp |= (NFSMNT_KERB | NFSMNT_PRIVACY); 553 } 554 555 static void 556 nfs_decode_args(struct mount *mp, struct nfsmount *nmp, struct nfs_args *argp, 557 const char *hostname, struct ucred *cred, struct thread *td) 558 { 559 int adjsock; 560 char *p; 561 562 /* 563 * Set read-only flag if requested; otherwise, clear it if this is 564 * an update. If this is not an update, then either the read-only 565 * flag is already clear, or this is a root mount and it was set 566 * intentionally at some previous point. 567 */ 568 if (vfs_getopt(mp->mnt_optnew, "ro", NULL, NULL) == 0) { 569 MNT_ILOCK(mp); 570 mp->mnt_flag |= MNT_RDONLY; 571 MNT_IUNLOCK(mp); 572 } else if (mp->mnt_flag & MNT_UPDATE) { 573 MNT_ILOCK(mp); 574 mp->mnt_flag &= ~MNT_RDONLY; 575 MNT_IUNLOCK(mp); 576 } 577 578 /* 579 * Silently clear NFSMNT_NOCONN if it's a TCP mount, it makes 580 * no sense in that context. Also, set up appropriate retransmit 581 * and soft timeout behavior. 582 */ 583 if (argp->sotype == SOCK_STREAM) { 584 nmp->nm_flag &= ~NFSMNT_NOCONN; 585 nmp->nm_timeo = NFS_MAXTIMEO; 586 if ((argp->flags & NFSMNT_NFSV4) != 0) 587 nmp->nm_retry = INT_MAX; 588 else 589 nmp->nm_retry = NFS_RETRANS_TCP; 590 } 591 592 /* Also clear RDIRPLUS if NFSv2, it crashes some servers */ 593 if ((argp->flags & (NFSMNT_NFSV3 | NFSMNT_NFSV4)) == 0) { 594 argp->flags &= ~NFSMNT_RDIRPLUS; 595 nmp->nm_flag &= ~NFSMNT_RDIRPLUS; 596 } 597 598 /* Clear ONEOPENOWN for NFSv2, 3 and 4.0. */ 599 if (nmp->nm_minorvers == 0) { 600 argp->flags &= ~NFSMNT_ONEOPENOWN; 601 nmp->nm_flag &= ~NFSMNT_ONEOPENOWN; 602 } 603 604 /* Re-bind if rsrvd port requested and wasn't on one */ 605 adjsock = !(nmp->nm_flag & NFSMNT_RESVPORT) 606 && (argp->flags & NFSMNT_RESVPORT); 607 /* Also re-bind if we're switching to/from a connected UDP socket */ 608 adjsock |= ((nmp->nm_flag & NFSMNT_NOCONN) != 609 (argp->flags & NFSMNT_NOCONN)); 610 611 /* Update flags atomically. Don't change the lock bits. */ 612 nmp->nm_flag = argp->flags | nmp->nm_flag; 613 614 if ((argp->flags & NFSMNT_TIMEO) && argp->timeo > 0) { 615 nmp->nm_timeo = (argp->timeo * NFS_HZ + 5) / 10; 616 if (nmp->nm_timeo < NFS_MINTIMEO) 617 nmp->nm_timeo = NFS_MINTIMEO; 618 else if (nmp->nm_timeo > NFS_MAXTIMEO) 619 nmp->nm_timeo = NFS_MAXTIMEO; 620 } 621 622 if ((argp->flags & NFSMNT_RETRANS) && argp->retrans > 1) { 623 nmp->nm_retry = argp->retrans; 624 if (nmp->nm_retry > NFS_MAXREXMIT) 625 nmp->nm_retry = NFS_MAXREXMIT; 626 } 627 628 if ((argp->flags & NFSMNT_WSIZE) && argp->wsize > 0) { 629 nmp->nm_wsize = argp->wsize; 630 /* 631 * Clip at the power of 2 below the size. There is an 632 * issue (not isolated) that causes intermittent page 633 * faults if this is not done. 634 */ 635 if (nmp->nm_wsize > NFS_FABLKSIZE) 636 nmp->nm_wsize = 1 << (fls(nmp->nm_wsize) - 1); 637 else 638 nmp->nm_wsize = NFS_FABLKSIZE; 639 } 640 641 if ((argp->flags & NFSMNT_RSIZE) && argp->rsize > 0) { 642 nmp->nm_rsize = argp->rsize; 643 /* 644 * Clip at the power of 2 below the size. There is an 645 * issue (not isolated) that causes intermittent page 646 * faults if this is not done. 647 */ 648 if (nmp->nm_rsize > NFS_FABLKSIZE) 649 nmp->nm_rsize = 1 << (fls(nmp->nm_rsize) - 1); 650 else 651 nmp->nm_rsize = NFS_FABLKSIZE; 652 } 653 654 if ((argp->flags & NFSMNT_READDIRSIZE) && argp->readdirsize > 0) { 655 nmp->nm_readdirsize = argp->readdirsize; 656 } 657 658 if ((argp->flags & NFSMNT_ACREGMIN) && argp->acregmin >= 0) 659 nmp->nm_acregmin = argp->acregmin; 660 else 661 nmp->nm_acregmin = NFS_MINATTRTIMO; 662 if ((argp->flags & NFSMNT_ACREGMAX) && argp->acregmax >= 0) 663 nmp->nm_acregmax = argp->acregmax; 664 else 665 nmp->nm_acregmax = NFS_MAXATTRTIMO; 666 if ((argp->flags & NFSMNT_ACDIRMIN) && argp->acdirmin >= 0) 667 nmp->nm_acdirmin = argp->acdirmin; 668 else 669 nmp->nm_acdirmin = NFS_MINDIRATTRTIMO; 670 if ((argp->flags & NFSMNT_ACDIRMAX) && argp->acdirmax >= 0) 671 nmp->nm_acdirmax = argp->acdirmax; 672 else 673 nmp->nm_acdirmax = NFS_MAXDIRATTRTIMO; 674 if (nmp->nm_acdirmin > nmp->nm_acdirmax) 675 nmp->nm_acdirmin = nmp->nm_acdirmax; 676 if (nmp->nm_acregmin > nmp->nm_acregmax) 677 nmp->nm_acregmin = nmp->nm_acregmax; 678 679 if ((argp->flags & NFSMNT_READAHEAD) && argp->readahead >= 0) { 680 if (argp->readahead <= NFS_MAXRAHEAD) 681 nmp->nm_readahead = argp->readahead; 682 else 683 nmp->nm_readahead = NFS_MAXRAHEAD; 684 } 685 if ((argp->flags & NFSMNT_WCOMMITSIZE) && argp->wcommitsize >= 0) { 686 if (argp->wcommitsize < nmp->nm_wsize) 687 nmp->nm_wcommitsize = nmp->nm_wsize; 688 else 689 nmp->nm_wcommitsize = argp->wcommitsize; 690 } 691 692 adjsock |= ((nmp->nm_sotype != argp->sotype) || 693 (nmp->nm_soproto != argp->proto)); 694 695 if (nmp->nm_client != NULL && adjsock) { 696 int haslock = 0, error = 0; 697 698 if (nmp->nm_sotype == SOCK_STREAM) { 699 error = newnfs_sndlock(&nmp->nm_sockreq.nr_lock); 700 if (!error) 701 haslock = 1; 702 } 703 if (!error) { 704 newnfs_disconnect(&nmp->nm_sockreq); 705 if (haslock) 706 newnfs_sndunlock(&nmp->nm_sockreq.nr_lock); 707 nmp->nm_sotype = argp->sotype; 708 nmp->nm_soproto = argp->proto; 709 if (nmp->nm_sotype == SOCK_DGRAM) 710 while (newnfs_connect(nmp, &nmp->nm_sockreq, 711 cred, td, 0)) { 712 printf("newnfs_args: retrying connect\n"); 713 (void) nfs_catnap(PSOCK, 0, "nfscon"); 714 } 715 } 716 } else { 717 nmp->nm_sotype = argp->sotype; 718 nmp->nm_soproto = argp->proto; 719 } 720 721 if (hostname != NULL) { 722 strlcpy(nmp->nm_hostname, hostname, 723 sizeof(nmp->nm_hostname)); 724 p = strchr(nmp->nm_hostname, ':'); 725 if (p != NULL) 726 *p = '\0'; 727 } 728 } 729 730 static const char *nfs_opts[] = { "from", "nfs_args", 731 "noac", "noatime", "noexec", "suiddir", "nosuid", "nosymfollow", "union", 732 "noclusterr", "noclusterw", "multilabel", "acls", "force", "update", 733 "async", "noconn", "nolockd", "conn", "lockd", "intr", "rdirplus", 734 "readdirsize", "soft", "hard", "mntudp", "tcp", "udp", "wsize", "rsize", 735 "retrans", "actimeo", "acregmin", "acregmax", "acdirmin", "acdirmax", 736 "resvport", "readahead", "hostname", "timeo", "timeout", "addr", "fh", 737 "nfsv3", "sec", "principal", "nfsv4", "gssname", "allgssname", "dirpath", 738 "minorversion", "nametimeo", "negnametimeo", "nocto", "noncontigwr", 739 "pnfs", "wcommitsize", "oneopenown", 740 NULL }; 741 742 /* 743 * Parse the "from" mountarg, passed by the generic mount(8) program 744 * or the mountroot code. This is used when rerooting into NFS. 745 * 746 * Note that the "hostname" is actually a "hostname:/share/path" string. 747 */ 748 static int 749 nfs_mount_parse_from(struct vfsoptlist *opts, char **hostnamep, 750 struct sockaddr_in **sinp, char *dirpath, size_t dirpathsize, int *dirlenp) 751 { 752 char *nam, *delimp, *hostp, *spec; 753 int error, have_bracket = 0, offset, rv, speclen; 754 struct sockaddr_in *sin; 755 size_t len; 756 757 error = vfs_getopt(opts, "from", (void **)&spec, &speclen); 758 if (error != 0) 759 return (error); 760 nam = malloc(MNAMELEN + 1, M_TEMP, M_WAITOK); 761 762 /* 763 * This part comes from sbin/mount_nfs/mount_nfs.c:getnfsargs(). 764 */ 765 if (*spec == '[' && (delimp = strchr(spec + 1, ']')) != NULL && 766 *(delimp + 1) == ':') { 767 hostp = spec + 1; 768 spec = delimp + 2; 769 have_bracket = 1; 770 } else if ((delimp = strrchr(spec, ':')) != NULL) { 771 hostp = spec; 772 spec = delimp + 1; 773 } else if ((delimp = strrchr(spec, '@')) != NULL) { 774 printf("%s: path@server syntax is deprecated, " 775 "use server:path\n", __func__); 776 hostp = delimp + 1; 777 } else { 778 printf("%s: no <host>:<dirpath> nfs-name\n", __func__); 779 free(nam, M_TEMP); 780 return (EINVAL); 781 } 782 *delimp = '\0'; 783 784 /* 785 * If there has been a trailing slash at mounttime it seems 786 * that some mountd implementations fail to remove the mount 787 * entries from their mountlist while unmounting. 788 */ 789 for (speclen = strlen(spec); 790 speclen > 1 && spec[speclen - 1] == '/'; 791 speclen--) 792 spec[speclen - 1] = '\0'; 793 if (strlen(hostp) + strlen(spec) + 1 > MNAMELEN) { 794 printf("%s: %s:%s: name too long", __func__, hostp, spec); 795 free(nam, M_TEMP); 796 return (EINVAL); 797 } 798 /* Make both '@' and ':' notations equal */ 799 if (*hostp != '\0') { 800 len = strlen(hostp); 801 offset = 0; 802 if (have_bracket) 803 nam[offset++] = '['; 804 memmove(nam + offset, hostp, len); 805 if (have_bracket) 806 nam[len + offset++] = ']'; 807 nam[len + offset++] = ':'; 808 memmove(nam + len + offset, spec, speclen); 809 nam[len + speclen + offset] = '\0'; 810 } else 811 nam[0] = '\0'; 812 813 /* 814 * XXX: IPv6 815 */ 816 sin = malloc(sizeof(*sin), M_SONAME, M_WAITOK); 817 rv = inet_pton(AF_INET, hostp, &sin->sin_addr); 818 if (rv != 1) { 819 printf("%s: cannot parse '%s', inet_pton() returned %d\n", 820 __func__, hostp, rv); 821 free(nam, M_TEMP); 822 free(sin, M_SONAME); 823 return (EINVAL); 824 } 825 826 sin->sin_len = sizeof(*sin); 827 sin->sin_family = AF_INET; 828 /* 829 * XXX: hardcoded port number. 830 */ 831 sin->sin_port = htons(2049); 832 833 *hostnamep = strdup(nam, M_NEWNFSMNT); 834 *sinp = sin; 835 strlcpy(dirpath, spec, dirpathsize); 836 *dirlenp = strlen(dirpath); 837 838 free(nam, M_TEMP); 839 return (0); 840 } 841 842 /* 843 * VFS Operations. 844 * 845 * mount system call 846 * It seems a bit dumb to copyinstr() the host and path here and then 847 * bcopy() them in mountnfs(), but I wanted to detect errors before 848 * doing the getsockaddr() call because getsockaddr() allocates an mbuf and 849 * an error after that means that I have to release the mbuf. 850 */ 851 /* ARGSUSED */ 852 static int 853 nfs_mount(struct mount *mp) 854 { 855 struct nfs_args args = { 856 .version = NFS_ARGSVERSION, 857 .addr = NULL, 858 .addrlen = sizeof (struct sockaddr_in), 859 .sotype = SOCK_STREAM, 860 .proto = 0, 861 .fh = NULL, 862 .fhsize = 0, 863 .flags = NFSMNT_RESVPORT, 864 .wsize = NFS_WSIZE, 865 .rsize = NFS_RSIZE, 866 .readdirsize = NFS_READDIRSIZE, 867 .timeo = 10, 868 .retrans = NFS_RETRANS, 869 .readahead = NFS_DEFRAHEAD, 870 .wcommitsize = 0, /* was: NQ_DEFLEASE */ 871 .hostname = NULL, 872 .acregmin = NFS_MINATTRTIMO, 873 .acregmax = NFS_MAXATTRTIMO, 874 .acdirmin = NFS_MINDIRATTRTIMO, 875 .acdirmax = NFS_MAXDIRATTRTIMO, 876 }; 877 int error = 0, ret, len; 878 struct sockaddr *nam = NULL; 879 struct vnode *vp; 880 struct thread *td; 881 char *hst; 882 u_char nfh[NFSX_FHMAX], krbname[100], dirpath[100], srvkrbname[100]; 883 char *cp, *opt, *name, *secname; 884 int nametimeo = NFS_DEFAULT_NAMETIMEO; 885 int negnametimeo = NFS_DEFAULT_NEGNAMETIMEO; 886 int minvers = 0; 887 int dirlen, has_nfs_args_opt, has_nfs_from_opt, 888 krbnamelen, srvkrbnamelen; 889 size_t hstlen; 890 891 has_nfs_args_opt = 0; 892 has_nfs_from_opt = 0; 893 hst = malloc(MNAMELEN, M_TEMP, M_WAITOK); 894 if (vfs_filteropt(mp->mnt_optnew, nfs_opts)) { 895 error = EINVAL; 896 goto out; 897 } 898 899 td = curthread; 900 if ((mp->mnt_flag & (MNT_ROOTFS | MNT_UPDATE)) == MNT_ROOTFS && 901 nfs_diskless_valid != 0) { 902 error = nfs_mountroot(mp); 903 goto out; 904 } 905 906 nfscl_init(); 907 908 /* 909 * The old mount_nfs program passed the struct nfs_args 910 * from userspace to kernel. The new mount_nfs program 911 * passes string options via nmount() from userspace to kernel 912 * and we populate the struct nfs_args in the kernel. 913 */ 914 if (vfs_getopt(mp->mnt_optnew, "nfs_args", NULL, NULL) == 0) { 915 error = vfs_copyopt(mp->mnt_optnew, "nfs_args", &args, 916 sizeof(args)); 917 if (error != 0) 918 goto out; 919 920 if (args.version != NFS_ARGSVERSION) { 921 error = EPROGMISMATCH; 922 goto out; 923 } 924 has_nfs_args_opt = 1; 925 } 926 927 /* Handle the new style options. */ 928 if (vfs_getopt(mp->mnt_optnew, "noac", NULL, NULL) == 0) { 929 args.acdirmin = args.acdirmax = 930 args.acregmin = args.acregmax = 0; 931 args.flags |= NFSMNT_ACDIRMIN | NFSMNT_ACDIRMAX | 932 NFSMNT_ACREGMIN | NFSMNT_ACREGMAX; 933 } 934 if (vfs_getopt(mp->mnt_optnew, "noconn", NULL, NULL) == 0) 935 args.flags |= NFSMNT_NOCONN; 936 if (vfs_getopt(mp->mnt_optnew, "conn", NULL, NULL) == 0) 937 args.flags &= ~NFSMNT_NOCONN; 938 if (vfs_getopt(mp->mnt_optnew, "nolockd", NULL, NULL) == 0) 939 args.flags |= NFSMNT_NOLOCKD; 940 if (vfs_getopt(mp->mnt_optnew, "lockd", NULL, NULL) == 0) 941 args.flags &= ~NFSMNT_NOLOCKD; 942 if (vfs_getopt(mp->mnt_optnew, "intr", NULL, NULL) == 0) 943 args.flags |= NFSMNT_INT; 944 if (vfs_getopt(mp->mnt_optnew, "rdirplus", NULL, NULL) == 0) 945 args.flags |= NFSMNT_RDIRPLUS; 946 if (vfs_getopt(mp->mnt_optnew, "resvport", NULL, NULL) == 0) 947 args.flags |= NFSMNT_RESVPORT; 948 if (vfs_getopt(mp->mnt_optnew, "noresvport", NULL, NULL) == 0) 949 args.flags &= ~NFSMNT_RESVPORT; 950 if (vfs_getopt(mp->mnt_optnew, "soft", NULL, NULL) == 0) 951 args.flags |= NFSMNT_SOFT; 952 if (vfs_getopt(mp->mnt_optnew, "hard", NULL, NULL) == 0) 953 args.flags &= ~NFSMNT_SOFT; 954 if (vfs_getopt(mp->mnt_optnew, "mntudp", NULL, NULL) == 0) 955 args.sotype = SOCK_DGRAM; 956 if (vfs_getopt(mp->mnt_optnew, "udp", NULL, NULL) == 0) 957 args.sotype = SOCK_DGRAM; 958 if (vfs_getopt(mp->mnt_optnew, "tcp", NULL, NULL) == 0) 959 args.sotype = SOCK_STREAM; 960 if (vfs_getopt(mp->mnt_optnew, "nfsv3", NULL, NULL) == 0) 961 args.flags |= NFSMNT_NFSV3; 962 if (vfs_getopt(mp->mnt_optnew, "nfsv4", NULL, NULL) == 0) { 963 args.flags |= NFSMNT_NFSV4; 964 args.sotype = SOCK_STREAM; 965 } 966 if (vfs_getopt(mp->mnt_optnew, "allgssname", NULL, NULL) == 0) 967 args.flags |= NFSMNT_ALLGSSNAME; 968 if (vfs_getopt(mp->mnt_optnew, "nocto", NULL, NULL) == 0) 969 args.flags |= NFSMNT_NOCTO; 970 if (vfs_getopt(mp->mnt_optnew, "noncontigwr", NULL, NULL) == 0) 971 args.flags |= NFSMNT_NONCONTIGWR; 972 if (vfs_getopt(mp->mnt_optnew, "pnfs", NULL, NULL) == 0) 973 args.flags |= NFSMNT_PNFS; 974 if (vfs_getopt(mp->mnt_optnew, "oneopenown", NULL, NULL) == 0) 975 args.flags |= NFSMNT_ONEOPENOWN; 976 if (vfs_getopt(mp->mnt_optnew, "readdirsize", (void **)&opt, NULL) == 0) { 977 if (opt == NULL) { 978 vfs_mount_error(mp, "illegal readdirsize"); 979 error = EINVAL; 980 goto out; 981 } 982 ret = sscanf(opt, "%d", &args.readdirsize); 983 if (ret != 1 || args.readdirsize <= 0) { 984 vfs_mount_error(mp, "illegal readdirsize: %s", 985 opt); 986 error = EINVAL; 987 goto out; 988 } 989 args.flags |= NFSMNT_READDIRSIZE; 990 } 991 if (vfs_getopt(mp->mnt_optnew, "readahead", (void **)&opt, NULL) == 0) { 992 if (opt == NULL) { 993 vfs_mount_error(mp, "illegal readahead"); 994 error = EINVAL; 995 goto out; 996 } 997 ret = sscanf(opt, "%d", &args.readahead); 998 if (ret != 1 || args.readahead <= 0) { 999 vfs_mount_error(mp, "illegal readahead: %s", 1000 opt); 1001 error = EINVAL; 1002 goto out; 1003 } 1004 args.flags |= NFSMNT_READAHEAD; 1005 } 1006 if (vfs_getopt(mp->mnt_optnew, "wsize", (void **)&opt, NULL) == 0) { 1007 if (opt == NULL) { 1008 vfs_mount_error(mp, "illegal wsize"); 1009 error = EINVAL; 1010 goto out; 1011 } 1012 ret = sscanf(opt, "%d", &args.wsize); 1013 if (ret != 1 || args.wsize <= 0) { 1014 vfs_mount_error(mp, "illegal wsize: %s", 1015 opt); 1016 error = EINVAL; 1017 goto out; 1018 } 1019 args.flags |= NFSMNT_WSIZE; 1020 } 1021 if (vfs_getopt(mp->mnt_optnew, "rsize", (void **)&opt, NULL) == 0) { 1022 if (opt == NULL) { 1023 vfs_mount_error(mp, "illegal rsize"); 1024 error = EINVAL; 1025 goto out; 1026 } 1027 ret = sscanf(opt, "%d", &args.rsize); 1028 if (ret != 1 || args.rsize <= 0) { 1029 vfs_mount_error(mp, "illegal wsize: %s", 1030 opt); 1031 error = EINVAL; 1032 goto out; 1033 } 1034 args.flags |= NFSMNT_RSIZE; 1035 } 1036 if (vfs_getopt(mp->mnt_optnew, "retrans", (void **)&opt, NULL) == 0) { 1037 if (opt == NULL) { 1038 vfs_mount_error(mp, "illegal retrans"); 1039 error = EINVAL; 1040 goto out; 1041 } 1042 ret = sscanf(opt, "%d", &args.retrans); 1043 if (ret != 1 || args.retrans <= 0) { 1044 vfs_mount_error(mp, "illegal retrans: %s", 1045 opt); 1046 error = EINVAL; 1047 goto out; 1048 } 1049 args.flags |= NFSMNT_RETRANS; 1050 } 1051 if (vfs_getopt(mp->mnt_optnew, "actimeo", (void **)&opt, NULL) == 0) { 1052 ret = sscanf(opt, "%d", &args.acregmin); 1053 if (ret != 1 || args.acregmin < 0) { 1054 vfs_mount_error(mp, "illegal actimeo: %s", 1055 opt); 1056 error = EINVAL; 1057 goto out; 1058 } 1059 args.acdirmin = args.acdirmax = args.acregmax = args.acregmin; 1060 args.flags |= NFSMNT_ACDIRMIN | NFSMNT_ACDIRMAX | 1061 NFSMNT_ACREGMIN | NFSMNT_ACREGMAX; 1062 } 1063 if (vfs_getopt(mp->mnt_optnew, "acregmin", (void **)&opt, NULL) == 0) { 1064 ret = sscanf(opt, "%d", &args.acregmin); 1065 if (ret != 1 || args.acregmin < 0) { 1066 vfs_mount_error(mp, "illegal acregmin: %s", 1067 opt); 1068 error = EINVAL; 1069 goto out; 1070 } 1071 args.flags |= NFSMNT_ACREGMIN; 1072 } 1073 if (vfs_getopt(mp->mnt_optnew, "acregmax", (void **)&opt, NULL) == 0) { 1074 ret = sscanf(opt, "%d", &args.acregmax); 1075 if (ret != 1 || args.acregmax < 0) { 1076 vfs_mount_error(mp, "illegal acregmax: %s", 1077 opt); 1078 error = EINVAL; 1079 goto out; 1080 } 1081 args.flags |= NFSMNT_ACREGMAX; 1082 } 1083 if (vfs_getopt(mp->mnt_optnew, "acdirmin", (void **)&opt, NULL) == 0) { 1084 ret = sscanf(opt, "%d", &args.acdirmin); 1085 if (ret != 1 || args.acdirmin < 0) { 1086 vfs_mount_error(mp, "illegal acdirmin: %s", 1087 opt); 1088 error = EINVAL; 1089 goto out; 1090 } 1091 args.flags |= NFSMNT_ACDIRMIN; 1092 } 1093 if (vfs_getopt(mp->mnt_optnew, "acdirmax", (void **)&opt, NULL) == 0) { 1094 ret = sscanf(opt, "%d", &args.acdirmax); 1095 if (ret != 1 || args.acdirmax < 0) { 1096 vfs_mount_error(mp, "illegal acdirmax: %s", 1097 opt); 1098 error = EINVAL; 1099 goto out; 1100 } 1101 args.flags |= NFSMNT_ACDIRMAX; 1102 } 1103 if (vfs_getopt(mp->mnt_optnew, "wcommitsize", (void **)&opt, NULL) == 0) { 1104 ret = sscanf(opt, "%d", &args.wcommitsize); 1105 if (ret != 1 || args.wcommitsize < 0) { 1106 vfs_mount_error(mp, "illegal wcommitsize: %s", opt); 1107 error = EINVAL; 1108 goto out; 1109 } 1110 args.flags |= NFSMNT_WCOMMITSIZE; 1111 } 1112 if (vfs_getopt(mp->mnt_optnew, "timeo", (void **)&opt, NULL) == 0) { 1113 ret = sscanf(opt, "%d", &args.timeo); 1114 if (ret != 1 || args.timeo <= 0) { 1115 vfs_mount_error(mp, "illegal timeo: %s", 1116 opt); 1117 error = EINVAL; 1118 goto out; 1119 } 1120 args.flags |= NFSMNT_TIMEO; 1121 } 1122 if (vfs_getopt(mp->mnt_optnew, "timeout", (void **)&opt, NULL) == 0) { 1123 ret = sscanf(opt, "%d", &args.timeo); 1124 if (ret != 1 || args.timeo <= 0) { 1125 vfs_mount_error(mp, "illegal timeout: %s", 1126 opt); 1127 error = EINVAL; 1128 goto out; 1129 } 1130 args.flags |= NFSMNT_TIMEO; 1131 } 1132 if (vfs_getopt(mp->mnt_optnew, "nametimeo", (void **)&opt, NULL) == 0) { 1133 ret = sscanf(opt, "%d", &nametimeo); 1134 if (ret != 1 || nametimeo < 0) { 1135 vfs_mount_error(mp, "illegal nametimeo: %s", opt); 1136 error = EINVAL; 1137 goto out; 1138 } 1139 } 1140 if (vfs_getopt(mp->mnt_optnew, "negnametimeo", (void **)&opt, NULL) 1141 == 0) { 1142 ret = sscanf(opt, "%d", &negnametimeo); 1143 if (ret != 1 || negnametimeo < 0) { 1144 vfs_mount_error(mp, "illegal negnametimeo: %s", 1145 opt); 1146 error = EINVAL; 1147 goto out; 1148 } 1149 } 1150 if (vfs_getopt(mp->mnt_optnew, "minorversion", (void **)&opt, NULL) == 1151 0) { 1152 ret = sscanf(opt, "%d", &minvers); 1153 if (ret != 1 || minvers < 0 || minvers > 1 || 1154 (args.flags & NFSMNT_NFSV4) == 0) { 1155 vfs_mount_error(mp, "illegal minorversion: %s", opt); 1156 error = EINVAL; 1157 goto out; 1158 } 1159 } 1160 if (vfs_getopt(mp->mnt_optnew, "sec", 1161 (void **) &secname, NULL) == 0) 1162 nfs_sec_name(secname, &args.flags); 1163 1164 if (mp->mnt_flag & MNT_UPDATE) { 1165 struct nfsmount *nmp = VFSTONFS(mp); 1166 1167 if (nmp == NULL) { 1168 error = EIO; 1169 goto out; 1170 } 1171 1172 /* 1173 * If a change from TCP->UDP is done and there are thread(s) 1174 * that have I/O RPC(s) in progress with a transfer size 1175 * greater than NFS_MAXDGRAMDATA, those thread(s) will be 1176 * hung, retrying the RPC(s) forever. Usually these threads 1177 * will be seen doing an uninterruptible sleep on wait channel 1178 * "nfsreq". 1179 */ 1180 if (args.sotype == SOCK_DGRAM && nmp->nm_sotype == SOCK_STREAM) 1181 tprintf(td->td_proc, LOG_WARNING, 1182 "Warning: mount -u that changes TCP->UDP can result in hung threads\n"); 1183 1184 /* 1185 * When doing an update, we can't change version, 1186 * security, switch lockd strategies, change cookie 1187 * translation or switch oneopenown. 1188 */ 1189 args.flags = (args.flags & 1190 ~(NFSMNT_NFSV3 | 1191 NFSMNT_NFSV4 | 1192 NFSMNT_KERB | 1193 NFSMNT_INTEGRITY | 1194 NFSMNT_PRIVACY | 1195 NFSMNT_ONEOPENOWN | 1196 NFSMNT_NOLOCKD /*|NFSMNT_XLATECOOKIE*/)) | 1197 (nmp->nm_flag & 1198 (NFSMNT_NFSV3 | 1199 NFSMNT_NFSV4 | 1200 NFSMNT_KERB | 1201 NFSMNT_INTEGRITY | 1202 NFSMNT_PRIVACY | 1203 NFSMNT_ONEOPENOWN | 1204 NFSMNT_NOLOCKD /*|NFSMNT_XLATECOOKIE*/)); 1205 nfs_decode_args(mp, nmp, &args, NULL, td->td_ucred, td); 1206 goto out; 1207 } 1208 1209 /* 1210 * Make the nfs_ip_paranoia sysctl serve as the default connection 1211 * or no-connection mode for those protocols that support 1212 * no-connection mode (the flag will be cleared later for protocols 1213 * that do not support no-connection mode). This will allow a client 1214 * to receive replies from a different IP then the request was 1215 * sent to. Note: default value for nfs_ip_paranoia is 1 (paranoid), 1216 * not 0. 1217 */ 1218 if (nfs_ip_paranoia == 0) 1219 args.flags |= NFSMNT_NOCONN; 1220 1221 if (has_nfs_args_opt != 0) { 1222 /* 1223 * In the 'nfs_args' case, the pointers in the args 1224 * structure are in userland - we copy them in here. 1225 */ 1226 if (args.fhsize < 0 || args.fhsize > NFSX_V3FHMAX) { 1227 vfs_mount_error(mp, "Bad file handle"); 1228 error = EINVAL; 1229 goto out; 1230 } 1231 error = copyin((caddr_t)args.fh, (caddr_t)nfh, 1232 args.fhsize); 1233 if (error != 0) 1234 goto out; 1235 error = copyinstr(args.hostname, hst, MNAMELEN - 1, &hstlen); 1236 if (error != 0) 1237 goto out; 1238 bzero(&hst[hstlen], MNAMELEN - hstlen); 1239 args.hostname = hst; 1240 /* getsockaddr() call must be after above copyin() calls */ 1241 error = getsockaddr(&nam, (caddr_t)args.addr, 1242 args.addrlen); 1243 if (error != 0) 1244 goto out; 1245 } else if (nfs_mount_parse_from(mp->mnt_optnew, 1246 &args.hostname, (struct sockaddr_in **)&nam, dirpath, 1247 sizeof(dirpath), &dirlen) == 0) { 1248 has_nfs_from_opt = 1; 1249 bcopy(args.hostname, hst, MNAMELEN); 1250 hst[MNAMELEN - 1] = '\0'; 1251 1252 /* 1253 * This only works with NFSv4 for now. 1254 */ 1255 args.fhsize = 0; 1256 args.flags |= NFSMNT_NFSV4; 1257 args.sotype = SOCK_STREAM; 1258 } else { 1259 if (vfs_getopt(mp->mnt_optnew, "fh", (void **)&args.fh, 1260 &args.fhsize) == 0) { 1261 if (args.fhsize < 0 || args.fhsize > NFSX_FHMAX) { 1262 vfs_mount_error(mp, "Bad file handle"); 1263 error = EINVAL; 1264 goto out; 1265 } 1266 bcopy(args.fh, nfh, args.fhsize); 1267 } else { 1268 args.fhsize = 0; 1269 } 1270 (void) vfs_getopt(mp->mnt_optnew, "hostname", 1271 (void **)&args.hostname, &len); 1272 if (args.hostname == NULL) { 1273 vfs_mount_error(mp, "Invalid hostname"); 1274 error = EINVAL; 1275 goto out; 1276 } 1277 if (len >= MNAMELEN) { 1278 vfs_mount_error(mp, "Hostname too long"); 1279 error = EINVAL; 1280 goto out; 1281 } 1282 bcopy(args.hostname, hst, len); 1283 hst[len] = '\0'; 1284 } 1285 1286 if (vfs_getopt(mp->mnt_optnew, "principal", (void **)&name, NULL) == 0) 1287 strlcpy(srvkrbname, name, sizeof (srvkrbname)); 1288 else { 1289 snprintf(srvkrbname, sizeof (srvkrbname), "nfs@%s", hst); 1290 cp = strchr(srvkrbname, ':'); 1291 if (cp != NULL) 1292 *cp = '\0'; 1293 } 1294 srvkrbnamelen = strlen(srvkrbname); 1295 1296 if (vfs_getopt(mp->mnt_optnew, "gssname", (void **)&name, NULL) == 0) 1297 strlcpy(krbname, name, sizeof (krbname)); 1298 else 1299 krbname[0] = '\0'; 1300 krbnamelen = strlen(krbname); 1301 1302 if (has_nfs_from_opt == 0) { 1303 if (vfs_getopt(mp->mnt_optnew, 1304 "dirpath", (void **)&name, NULL) == 0) 1305 strlcpy(dirpath, name, sizeof (dirpath)); 1306 else 1307 dirpath[0] = '\0'; 1308 dirlen = strlen(dirpath); 1309 } 1310 1311 if (has_nfs_args_opt == 0 && has_nfs_from_opt == 0) { 1312 if (vfs_getopt(mp->mnt_optnew, "addr", 1313 (void **)&args.addr, &args.addrlen) == 0) { 1314 if (args.addrlen > SOCK_MAXADDRLEN) { 1315 error = ENAMETOOLONG; 1316 goto out; 1317 } 1318 nam = malloc(args.addrlen, M_SONAME, M_WAITOK); 1319 bcopy(args.addr, nam, args.addrlen); 1320 nam->sa_len = args.addrlen; 1321 } else { 1322 vfs_mount_error(mp, "No server address"); 1323 error = EINVAL; 1324 goto out; 1325 } 1326 } 1327 1328 args.fh = nfh; 1329 error = mountnfs(&args, mp, nam, hst, krbname, krbnamelen, dirpath, 1330 dirlen, srvkrbname, srvkrbnamelen, &vp, td->td_ucred, td, 1331 nametimeo, negnametimeo, minvers); 1332 out: 1333 if (!error) { 1334 MNT_ILOCK(mp); 1335 mp->mnt_kern_flag |= MNTK_LOOKUP_SHARED | MNTK_NO_IOPF | 1336 MNTK_USES_BCACHE; 1337 if ((VFSTONFS(mp)->nm_flag & NFSMNT_NFSV4) != 0) 1338 mp->mnt_kern_flag |= MNTK_NULL_NOCACHE; 1339 MNT_IUNLOCK(mp); 1340 } 1341 free(hst, M_TEMP); 1342 return (error); 1343 } 1344 1345 1346 /* 1347 * VFS Operations. 1348 * 1349 * mount system call 1350 * It seems a bit dumb to copyinstr() the host and path here and then 1351 * bcopy() them in mountnfs(), but I wanted to detect errors before 1352 * doing the getsockaddr() call because getsockaddr() allocates an mbuf and 1353 * an error after that means that I have to release the mbuf. 1354 */ 1355 /* ARGSUSED */ 1356 static int 1357 nfs_cmount(struct mntarg *ma, void *data, uint64_t flags) 1358 { 1359 int error; 1360 struct nfs_args args; 1361 1362 error = copyin(data, &args, sizeof (struct nfs_args)); 1363 if (error) 1364 return error; 1365 1366 ma = mount_arg(ma, "nfs_args", &args, sizeof args); 1367 1368 error = kernel_mount(ma, flags); 1369 return (error); 1370 } 1371 1372 /* 1373 * Common code for mount and mountroot 1374 */ 1375 static int 1376 mountnfs(struct nfs_args *argp, struct mount *mp, struct sockaddr *nam, 1377 char *hst, u_char *krbname, int krbnamelen, u_char *dirpath, int dirlen, 1378 u_char *srvkrbname, int srvkrbnamelen, struct vnode **vpp, 1379 struct ucred *cred, struct thread *td, int nametimeo, int negnametimeo, 1380 int minvers) 1381 { 1382 struct nfsmount *nmp; 1383 struct nfsnode *np; 1384 int error, trycnt, ret; 1385 struct nfsvattr nfsva; 1386 struct nfsclclient *clp; 1387 struct nfsclds *dsp, *tdsp; 1388 uint32_t lease; 1389 static u_int64_t clval = 0; 1390 1391 NFSCL_DEBUG(3, "in mnt\n"); 1392 clp = NULL; 1393 if (mp->mnt_flag & MNT_UPDATE) { 1394 nmp = VFSTONFS(mp); 1395 printf("%s: MNT_UPDATE is no longer handled here\n", __func__); 1396 free(nam, M_SONAME); 1397 return (0); 1398 } else { 1399 nmp = malloc(sizeof (struct nfsmount) + 1400 krbnamelen + dirlen + srvkrbnamelen + 2, 1401 M_NEWNFSMNT, M_WAITOK | M_ZERO); 1402 TAILQ_INIT(&nmp->nm_bufq); 1403 TAILQ_INIT(&nmp->nm_sess); 1404 if (clval == 0) 1405 clval = (u_int64_t)nfsboottime.tv_sec; 1406 nmp->nm_clval = clval++; 1407 nmp->nm_krbnamelen = krbnamelen; 1408 nmp->nm_dirpathlen = dirlen; 1409 nmp->nm_srvkrbnamelen = srvkrbnamelen; 1410 if (td->td_ucred->cr_uid != (uid_t)0) { 1411 /* 1412 * nm_uid is used to get KerberosV credentials for 1413 * the nfsv4 state handling operations if there is 1414 * no host based principal set. Use the uid of 1415 * this user if not root, since they are doing the 1416 * mount. I don't think setting this for root will 1417 * work, since root normally does not have user 1418 * credentials in a credentials cache. 1419 */ 1420 nmp->nm_uid = td->td_ucred->cr_uid; 1421 } else { 1422 /* 1423 * Just set to -1, so it won't be used. 1424 */ 1425 nmp->nm_uid = (uid_t)-1; 1426 } 1427 1428 /* Copy and null terminate all the names */ 1429 if (nmp->nm_krbnamelen > 0) { 1430 bcopy(krbname, nmp->nm_krbname, nmp->nm_krbnamelen); 1431 nmp->nm_name[nmp->nm_krbnamelen] = '\0'; 1432 } 1433 if (nmp->nm_dirpathlen > 0) { 1434 bcopy(dirpath, NFSMNT_DIRPATH(nmp), 1435 nmp->nm_dirpathlen); 1436 nmp->nm_name[nmp->nm_krbnamelen + nmp->nm_dirpathlen 1437 + 1] = '\0'; 1438 } 1439 if (nmp->nm_srvkrbnamelen > 0) { 1440 bcopy(srvkrbname, NFSMNT_SRVKRBNAME(nmp), 1441 nmp->nm_srvkrbnamelen); 1442 nmp->nm_name[nmp->nm_krbnamelen + nmp->nm_dirpathlen 1443 + nmp->nm_srvkrbnamelen + 2] = '\0'; 1444 } 1445 nmp->nm_sockreq.nr_cred = crhold(cred); 1446 mtx_init(&nmp->nm_sockreq.nr_mtx, "nfssock", NULL, MTX_DEF); 1447 mp->mnt_data = nmp; 1448 nmp->nm_getinfo = nfs_getnlminfo; 1449 nmp->nm_vinvalbuf = ncl_vinvalbuf; 1450 } 1451 vfs_getnewfsid(mp); 1452 nmp->nm_mountp = mp; 1453 mtx_init(&nmp->nm_mtx, "NFSmount lock", NULL, MTX_DEF | MTX_DUPOK); 1454 1455 /* 1456 * Since nfs_decode_args() might optionally set them, these 1457 * need to be set to defaults before the call, so that the 1458 * optional settings aren't overwritten. 1459 */ 1460 nmp->nm_nametimeo = nametimeo; 1461 nmp->nm_negnametimeo = negnametimeo; 1462 nmp->nm_timeo = NFS_TIMEO; 1463 nmp->nm_retry = NFS_RETRANS; 1464 nmp->nm_readahead = NFS_DEFRAHEAD; 1465 1466 /* This is empirical approximation of sqrt(hibufspace) * 256. */ 1467 nmp->nm_wcommitsize = NFS_MAXBSIZE / 256; 1468 while ((long)nmp->nm_wcommitsize * nmp->nm_wcommitsize < hibufspace) 1469 nmp->nm_wcommitsize *= 2; 1470 nmp->nm_wcommitsize *= 256; 1471 1472 if ((argp->flags & NFSMNT_NFSV4) != 0) 1473 nmp->nm_minorvers = minvers; 1474 else 1475 nmp->nm_minorvers = 0; 1476 1477 nfs_decode_args(mp, nmp, argp, hst, cred, td); 1478 1479 /* 1480 * V2 can only handle 32 bit filesizes. A 4GB-1 limit may be too 1481 * high, depending on whether we end up with negative offsets in 1482 * the client or server somewhere. 2GB-1 may be safer. 1483 * 1484 * For V3, ncl_fsinfo will adjust this as necessary. Assume maximum 1485 * that we can handle until we find out otherwise. 1486 */ 1487 if ((argp->flags & (NFSMNT_NFSV3 | NFSMNT_NFSV4)) == 0) 1488 nmp->nm_maxfilesize = 0xffffffffLL; 1489 else 1490 nmp->nm_maxfilesize = OFF_MAX; 1491 1492 if ((argp->flags & (NFSMNT_NFSV3 | NFSMNT_NFSV4)) == 0) { 1493 nmp->nm_wsize = NFS_WSIZE; 1494 nmp->nm_rsize = NFS_RSIZE; 1495 nmp->nm_readdirsize = NFS_READDIRSIZE; 1496 } 1497 nmp->nm_numgrps = NFS_MAXGRPS; 1498 nmp->nm_tprintf_delay = nfs_tprintf_delay; 1499 if (nmp->nm_tprintf_delay < 0) 1500 nmp->nm_tprintf_delay = 0; 1501 nmp->nm_tprintf_initial_delay = nfs_tprintf_initial_delay; 1502 if (nmp->nm_tprintf_initial_delay < 0) 1503 nmp->nm_tprintf_initial_delay = 0; 1504 nmp->nm_fhsize = argp->fhsize; 1505 if (nmp->nm_fhsize > 0) 1506 bcopy((caddr_t)argp->fh, (caddr_t)nmp->nm_fh, argp->fhsize); 1507 bcopy(hst, mp->mnt_stat.f_mntfromname, MNAMELEN); 1508 nmp->nm_nam = nam; 1509 /* Set up the sockets and per-host congestion */ 1510 nmp->nm_sotype = argp->sotype; 1511 nmp->nm_soproto = argp->proto; 1512 nmp->nm_sockreq.nr_prog = NFS_PROG; 1513 if ((argp->flags & NFSMNT_NFSV4)) 1514 nmp->nm_sockreq.nr_vers = NFS_VER4; 1515 else if ((argp->flags & NFSMNT_NFSV3)) 1516 nmp->nm_sockreq.nr_vers = NFS_VER3; 1517 else 1518 nmp->nm_sockreq.nr_vers = NFS_VER2; 1519 1520 1521 if ((error = newnfs_connect(nmp, &nmp->nm_sockreq, cred, td, 0))) 1522 goto bad; 1523 /* For NFSv4.1, get the clientid now. */ 1524 if (nmp->nm_minorvers > 0) { 1525 NFSCL_DEBUG(3, "at getcl\n"); 1526 error = nfscl_getcl(mp, cred, td, 0, &clp); 1527 NFSCL_DEBUG(3, "aft getcl=%d\n", error); 1528 if (error != 0) 1529 goto bad; 1530 } 1531 1532 if (nmp->nm_fhsize == 0 && (nmp->nm_flag & NFSMNT_NFSV4) && 1533 nmp->nm_dirpathlen > 0) { 1534 NFSCL_DEBUG(3, "in dirp\n"); 1535 /* 1536 * If the fhsize on the mount point == 0 for V4, the mount 1537 * path needs to be looked up. 1538 */ 1539 trycnt = 3; 1540 do { 1541 error = nfsrpc_getdirpath(nmp, NFSMNT_DIRPATH(nmp), 1542 cred, td); 1543 NFSCL_DEBUG(3, "aft dirp=%d\n", error); 1544 if (error) 1545 (void) nfs_catnap(PZERO, error, "nfsgetdirp"); 1546 } while (error && --trycnt > 0); 1547 if (error) { 1548 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0); 1549 goto bad; 1550 } 1551 } 1552 1553 /* 1554 * A reference count is needed on the nfsnode representing the 1555 * remote root. If this object is not persistent, then backward 1556 * traversals of the mount point (i.e. "..") will not work if 1557 * the nfsnode gets flushed out of the cache. Ufs does not have 1558 * this problem, because one can identify root inodes by their 1559 * number == UFS_ROOTINO (2). 1560 */ 1561 if (nmp->nm_fhsize > 0) { 1562 /* 1563 * Set f_iosize to NFS_DIRBLKSIZ so that bo_bsize gets set 1564 * non-zero for the root vnode. f_iosize will be set correctly 1565 * by nfs_statfs() before any I/O occurs. 1566 */ 1567 mp->mnt_stat.f_iosize = NFS_DIRBLKSIZ; 1568 error = ncl_nget(mp, nmp->nm_fh, nmp->nm_fhsize, &np, 1569 LK_EXCLUSIVE); 1570 if (error) 1571 goto bad; 1572 *vpp = NFSTOV(np); 1573 1574 /* 1575 * Get file attributes and transfer parameters for the 1576 * mountpoint. This has the side effect of filling in 1577 * (*vpp)->v_type with the correct value. 1578 */ 1579 ret = nfsrpc_getattrnovp(nmp, nmp->nm_fh, nmp->nm_fhsize, 1, 1580 cred, td, &nfsva, NULL, &lease); 1581 if (ret) { 1582 /* 1583 * Just set default values to get things going. 1584 */ 1585 NFSBZERO((caddr_t)&nfsva, sizeof (struct nfsvattr)); 1586 nfsva.na_vattr.va_type = VDIR; 1587 nfsva.na_vattr.va_mode = 0777; 1588 nfsva.na_vattr.va_nlink = 100; 1589 nfsva.na_vattr.va_uid = (uid_t)0; 1590 nfsva.na_vattr.va_gid = (gid_t)0; 1591 nfsva.na_vattr.va_fileid = 2; 1592 nfsva.na_vattr.va_gen = 1; 1593 nfsva.na_vattr.va_blocksize = NFS_FABLKSIZE; 1594 nfsva.na_vattr.va_size = 512 * 1024; 1595 lease = 60; 1596 } 1597 (void) nfscl_loadattrcache(vpp, &nfsva, NULL, NULL, 0, 1); 1598 if (nmp->nm_minorvers > 0) { 1599 NFSCL_DEBUG(3, "lease=%d\n", (int)lease); 1600 NFSLOCKCLSTATE(); 1601 clp->nfsc_renew = NFSCL_RENEW(lease); 1602 clp->nfsc_expire = NFSD_MONOSEC + clp->nfsc_renew; 1603 clp->nfsc_clientidrev++; 1604 if (clp->nfsc_clientidrev == 0) 1605 clp->nfsc_clientidrev++; 1606 NFSUNLOCKCLSTATE(); 1607 /* 1608 * Mount will succeed, so the renew thread can be 1609 * started now. 1610 */ 1611 nfscl_start_renewthread(clp); 1612 nfscl_clientrelease(clp); 1613 } 1614 if (argp->flags & NFSMNT_NFSV3) 1615 ncl_fsinfo(nmp, *vpp, cred, td); 1616 1617 /* Mark if the mount point supports NFSv4 ACLs. */ 1618 if ((argp->flags & NFSMNT_NFSV4) != 0 && nfsrv_useacl != 0 && 1619 ret == 0 && 1620 NFSISSET_ATTRBIT(&nfsva.na_suppattr, NFSATTRBIT_ACL)) { 1621 MNT_ILOCK(mp); 1622 mp->mnt_flag |= MNT_NFS4ACLS; 1623 MNT_IUNLOCK(mp); 1624 } 1625 1626 /* 1627 * Lose the lock but keep the ref. 1628 */ 1629 NFSVOPUNLOCK(*vpp, 0); 1630 return (0); 1631 } 1632 error = EIO; 1633 1634 bad: 1635 if (clp != NULL) 1636 nfscl_clientrelease(clp); 1637 newnfs_disconnect(&nmp->nm_sockreq); 1638 crfree(nmp->nm_sockreq.nr_cred); 1639 if (nmp->nm_sockreq.nr_auth != NULL) 1640 AUTH_DESTROY(nmp->nm_sockreq.nr_auth); 1641 mtx_destroy(&nmp->nm_sockreq.nr_mtx); 1642 mtx_destroy(&nmp->nm_mtx); 1643 if (nmp->nm_clp != NULL) { 1644 NFSLOCKCLSTATE(); 1645 LIST_REMOVE(nmp->nm_clp, nfsc_list); 1646 NFSUNLOCKCLSTATE(); 1647 free(nmp->nm_clp, M_NFSCLCLIENT); 1648 } 1649 TAILQ_FOREACH_SAFE(dsp, &nmp->nm_sess, nfsclds_list, tdsp) { 1650 if (dsp != TAILQ_FIRST(&nmp->nm_sess) && 1651 dsp->nfsclds_sockp != NULL) 1652 newnfs_disconnect(dsp->nfsclds_sockp); 1653 nfscl_freenfsclds(dsp); 1654 } 1655 free(nmp, M_NEWNFSMNT); 1656 free(nam, M_SONAME); 1657 return (error); 1658 } 1659 1660 /* 1661 * unmount system call 1662 */ 1663 static int 1664 nfs_unmount(struct mount *mp, int mntflags) 1665 { 1666 struct thread *td; 1667 struct nfsmount *nmp; 1668 int error, flags = 0, i, trycnt = 0; 1669 struct nfsclds *dsp, *tdsp; 1670 1671 td = curthread; 1672 1673 if (mntflags & MNT_FORCE) 1674 flags |= FORCECLOSE; 1675 nmp = VFSTONFS(mp); 1676 error = 0; 1677 /* 1678 * Goes something like this.. 1679 * - Call vflush() to clear out vnodes for this filesystem 1680 * - Close the socket 1681 * - Free up the data structures 1682 */ 1683 /* In the forced case, cancel any outstanding requests. */ 1684 if (mntflags & MNT_FORCE) { 1685 NFSDDSLOCK(); 1686 if (nfsv4_findmirror(nmp) != NULL) 1687 error = ENXIO; 1688 NFSDDSUNLOCK(); 1689 if (error) 1690 goto out; 1691 error = newnfs_nmcancelreqs(nmp); 1692 if (error) 1693 goto out; 1694 /* For a forced close, get rid of the renew thread now */ 1695 nfscl_umount(nmp, td); 1696 } 1697 /* We hold 1 extra ref on the root vnode; see comment in mountnfs(). */ 1698 do { 1699 error = vflush(mp, 1, flags, td); 1700 if ((mntflags & MNT_FORCE) && error != 0 && ++trycnt < 30) 1701 (void) nfs_catnap(PSOCK, error, "newndm"); 1702 } while ((mntflags & MNT_FORCE) && error != 0 && trycnt < 30); 1703 if (error) 1704 goto out; 1705 1706 /* 1707 * We are now committed to the unmount. 1708 */ 1709 if ((mntflags & MNT_FORCE) == 0) 1710 nfscl_umount(nmp, td); 1711 else { 1712 mtx_lock(&nmp->nm_mtx); 1713 nmp->nm_privflag |= NFSMNTP_FORCEDISM; 1714 mtx_unlock(&nmp->nm_mtx); 1715 } 1716 /* Make sure no nfsiods are assigned to this mount. */ 1717 mtx_lock(&ncl_iod_mutex); 1718 for (i = 0; i < NFS_MAXASYNCDAEMON; i++) 1719 if (ncl_iodmount[i] == nmp) { 1720 ncl_iodwant[i] = NFSIOD_AVAILABLE; 1721 ncl_iodmount[i] = NULL; 1722 } 1723 mtx_unlock(&ncl_iod_mutex); 1724 1725 /* 1726 * We can now set mnt_data to NULL and wait for 1727 * nfssvc(NFSSVC_FORCEDISM) to complete. 1728 */ 1729 mtx_lock(&mountlist_mtx); 1730 mtx_lock(&nmp->nm_mtx); 1731 mp->mnt_data = NULL; 1732 mtx_unlock(&mountlist_mtx); 1733 while ((nmp->nm_privflag & NFSMNTP_CANCELRPCS) != 0) 1734 msleep(nmp, &nmp->nm_mtx, PVFS, "nfsfdism", 0); 1735 mtx_unlock(&nmp->nm_mtx); 1736 1737 newnfs_disconnect(&nmp->nm_sockreq); 1738 crfree(nmp->nm_sockreq.nr_cred); 1739 free(nmp->nm_nam, M_SONAME); 1740 if (nmp->nm_sockreq.nr_auth != NULL) 1741 AUTH_DESTROY(nmp->nm_sockreq.nr_auth); 1742 mtx_destroy(&nmp->nm_sockreq.nr_mtx); 1743 mtx_destroy(&nmp->nm_mtx); 1744 TAILQ_FOREACH_SAFE(dsp, &nmp->nm_sess, nfsclds_list, tdsp) { 1745 if (dsp != TAILQ_FIRST(&nmp->nm_sess) && 1746 dsp->nfsclds_sockp != NULL) 1747 newnfs_disconnect(dsp->nfsclds_sockp); 1748 nfscl_freenfsclds(dsp); 1749 } 1750 free(nmp, M_NEWNFSMNT); 1751 out: 1752 return (error); 1753 } 1754 1755 /* 1756 * Return root of a filesystem 1757 */ 1758 static int 1759 nfs_root(struct mount *mp, int flags, struct vnode **vpp) 1760 { 1761 struct vnode *vp; 1762 struct nfsmount *nmp; 1763 struct nfsnode *np; 1764 int error; 1765 1766 nmp = VFSTONFS(mp); 1767 error = ncl_nget(mp, nmp->nm_fh, nmp->nm_fhsize, &np, flags); 1768 if (error) 1769 return error; 1770 vp = NFSTOV(np); 1771 /* 1772 * Get transfer parameters and attributes for root vnode once. 1773 */ 1774 mtx_lock(&nmp->nm_mtx); 1775 if (NFSHASNFSV3(nmp) && !NFSHASGOTFSINFO(nmp)) { 1776 mtx_unlock(&nmp->nm_mtx); 1777 ncl_fsinfo(nmp, vp, curthread->td_ucred, curthread); 1778 } else 1779 mtx_unlock(&nmp->nm_mtx); 1780 if (vp->v_type == VNON) 1781 vp->v_type = VDIR; 1782 vp->v_vflag |= VV_ROOT; 1783 *vpp = vp; 1784 return (0); 1785 } 1786 1787 /* 1788 * Flush out the buffer cache 1789 */ 1790 /* ARGSUSED */ 1791 static int 1792 nfs_sync(struct mount *mp, int waitfor) 1793 { 1794 struct vnode *vp, *mvp; 1795 struct thread *td; 1796 int error, allerror = 0; 1797 1798 td = curthread; 1799 1800 MNT_ILOCK(mp); 1801 /* 1802 * If a forced dismount is in progress, return from here so that 1803 * the umount(2) syscall doesn't get stuck in VFS_SYNC() before 1804 * calling VFS_UNMOUNT(). 1805 */ 1806 if (NFSCL_FORCEDISM(mp)) { 1807 MNT_IUNLOCK(mp); 1808 return (EBADF); 1809 } 1810 MNT_IUNLOCK(mp); 1811 1812 /* 1813 * Force stale buffer cache information to be flushed. 1814 */ 1815 loop: 1816 MNT_VNODE_FOREACH_ALL(vp, mp, mvp) { 1817 /* XXX Racy bv_cnt check. */ 1818 if (NFSVOPISLOCKED(vp) || vp->v_bufobj.bo_dirty.bv_cnt == 0 || 1819 waitfor == MNT_LAZY) { 1820 VI_UNLOCK(vp); 1821 continue; 1822 } 1823 if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK, td)) { 1824 MNT_VNODE_FOREACH_ALL_ABORT(mp, mvp); 1825 goto loop; 1826 } 1827 error = VOP_FSYNC(vp, waitfor, td); 1828 if (error) 1829 allerror = error; 1830 NFSVOPUNLOCK(vp, 0); 1831 vrele(vp); 1832 } 1833 return (allerror); 1834 } 1835 1836 static int 1837 nfs_sysctl(struct mount *mp, fsctlop_t op, struct sysctl_req *req) 1838 { 1839 struct nfsmount *nmp = VFSTONFS(mp); 1840 struct vfsquery vq; 1841 int error; 1842 1843 bzero(&vq, sizeof(vq)); 1844 switch (op) { 1845 #if 0 1846 case VFS_CTL_NOLOCKS: 1847 val = (nmp->nm_flag & NFSMNT_NOLOCKS) ? 1 : 0; 1848 if (req->oldptr != NULL) { 1849 error = SYSCTL_OUT(req, &val, sizeof(val)); 1850 if (error) 1851 return (error); 1852 } 1853 if (req->newptr != NULL) { 1854 error = SYSCTL_IN(req, &val, sizeof(val)); 1855 if (error) 1856 return (error); 1857 if (val) 1858 nmp->nm_flag |= NFSMNT_NOLOCKS; 1859 else 1860 nmp->nm_flag &= ~NFSMNT_NOLOCKS; 1861 } 1862 break; 1863 #endif 1864 case VFS_CTL_QUERY: 1865 mtx_lock(&nmp->nm_mtx); 1866 if (nmp->nm_state & NFSSTA_TIMEO) 1867 vq.vq_flags |= VQ_NOTRESP; 1868 mtx_unlock(&nmp->nm_mtx); 1869 #if 0 1870 if (!(nmp->nm_flag & NFSMNT_NOLOCKS) && 1871 (nmp->nm_state & NFSSTA_LOCKTIMEO)) 1872 vq.vq_flags |= VQ_NOTRESPLOCK; 1873 #endif 1874 error = SYSCTL_OUT(req, &vq, sizeof(vq)); 1875 break; 1876 case VFS_CTL_TIMEO: 1877 if (req->oldptr != NULL) { 1878 error = SYSCTL_OUT(req, &nmp->nm_tprintf_initial_delay, 1879 sizeof(nmp->nm_tprintf_initial_delay)); 1880 if (error) 1881 return (error); 1882 } 1883 if (req->newptr != NULL) { 1884 error = vfs_suser(mp, req->td); 1885 if (error) 1886 return (error); 1887 error = SYSCTL_IN(req, &nmp->nm_tprintf_initial_delay, 1888 sizeof(nmp->nm_tprintf_initial_delay)); 1889 if (error) 1890 return (error); 1891 if (nmp->nm_tprintf_initial_delay < 0) 1892 nmp->nm_tprintf_initial_delay = 0; 1893 } 1894 break; 1895 default: 1896 return (ENOTSUP); 1897 } 1898 return (0); 1899 } 1900 1901 /* 1902 * Purge any RPCs in progress, so that they will all return errors. 1903 * This allows dounmount() to continue as far as VFS_UNMOUNT() for a 1904 * forced dismount. 1905 */ 1906 static void 1907 nfs_purge(struct mount *mp) 1908 { 1909 struct nfsmount *nmp = VFSTONFS(mp); 1910 1911 newnfs_nmcancelreqs(nmp); 1912 } 1913 1914 /* 1915 * Extract the information needed by the nlm from the nfs vnode. 1916 */ 1917 static void 1918 nfs_getnlminfo(struct vnode *vp, uint8_t *fhp, size_t *fhlenp, 1919 struct sockaddr_storage *sp, int *is_v3p, off_t *sizep, 1920 struct timeval *timeop) 1921 { 1922 struct nfsmount *nmp; 1923 struct nfsnode *np = VTONFS(vp); 1924 1925 nmp = VFSTONFS(vp->v_mount); 1926 if (fhlenp != NULL) 1927 *fhlenp = (size_t)np->n_fhp->nfh_len; 1928 if (fhp != NULL) 1929 bcopy(np->n_fhp->nfh_fh, fhp, np->n_fhp->nfh_len); 1930 if (sp != NULL) 1931 bcopy(nmp->nm_nam, sp, min(nmp->nm_nam->sa_len, sizeof(*sp))); 1932 if (is_v3p != NULL) 1933 *is_v3p = NFS_ISV3(vp); 1934 if (sizep != NULL) 1935 *sizep = np->n_size; 1936 if (timeop != NULL) { 1937 timeop->tv_sec = nmp->nm_timeo / NFS_HZ; 1938 timeop->tv_usec = (nmp->nm_timeo % NFS_HZ) * (1000000 / NFS_HZ); 1939 } 1940 } 1941 1942 /* 1943 * This function prints out an option name, based on the conditional 1944 * argument. 1945 */ 1946 static __inline void nfscl_printopt(struct nfsmount *nmp, int testval, 1947 char *opt, char **buf, size_t *blen) 1948 { 1949 int len; 1950 1951 if (testval != 0 && *blen > strlen(opt)) { 1952 len = snprintf(*buf, *blen, "%s", opt); 1953 if (len != strlen(opt)) 1954 printf("EEK!!\n"); 1955 *buf += len; 1956 *blen -= len; 1957 } 1958 } 1959 1960 /* 1961 * This function printf out an options integer value. 1962 */ 1963 static __inline void nfscl_printoptval(struct nfsmount *nmp, int optval, 1964 char *opt, char **buf, size_t *blen) 1965 { 1966 int len; 1967 1968 if (*blen > strlen(opt) + 1) { 1969 /* Could result in truncated output string. */ 1970 len = snprintf(*buf, *blen, "%s=%d", opt, optval); 1971 if (len < *blen) { 1972 *buf += len; 1973 *blen -= len; 1974 } 1975 } 1976 } 1977 1978 /* 1979 * Load the option flags and values into the buffer. 1980 */ 1981 void nfscl_retopts(struct nfsmount *nmp, char *buffer, size_t buflen) 1982 { 1983 char *buf; 1984 size_t blen; 1985 1986 buf = buffer; 1987 blen = buflen; 1988 nfscl_printopt(nmp, (nmp->nm_flag & NFSMNT_NFSV4) != 0, "nfsv4", &buf, 1989 &blen); 1990 if ((nmp->nm_flag & NFSMNT_NFSV4) != 0) { 1991 nfscl_printoptval(nmp, nmp->nm_minorvers, ",minorversion", &buf, 1992 &blen); 1993 nfscl_printopt(nmp, (nmp->nm_flag & NFSMNT_PNFS) != 0, ",pnfs", 1994 &buf, &blen); 1995 nfscl_printopt(nmp, (nmp->nm_flag & NFSMNT_ONEOPENOWN) != 0 && 1996 nmp->nm_minorvers > 0, ",oneopenown", &buf, &blen); 1997 } 1998 nfscl_printopt(nmp, (nmp->nm_flag & NFSMNT_NFSV3) != 0, "nfsv3", &buf, 1999 &blen); 2000 nfscl_printopt(nmp, (nmp->nm_flag & (NFSMNT_NFSV3 | NFSMNT_NFSV4)) == 0, 2001 "nfsv2", &buf, &blen); 2002 nfscl_printopt(nmp, nmp->nm_sotype == SOCK_STREAM, ",tcp", &buf, &blen); 2003 nfscl_printopt(nmp, nmp->nm_sotype != SOCK_STREAM, ",udp", &buf, &blen); 2004 nfscl_printopt(nmp, (nmp->nm_flag & NFSMNT_RESVPORT) != 0, ",resvport", 2005 &buf, &blen); 2006 nfscl_printopt(nmp, (nmp->nm_flag & NFSMNT_NOCONN) != 0, ",noconn", 2007 &buf, &blen); 2008 nfscl_printopt(nmp, (nmp->nm_flag & NFSMNT_SOFT) == 0, ",hard", &buf, 2009 &blen); 2010 nfscl_printopt(nmp, (nmp->nm_flag & NFSMNT_SOFT) != 0, ",soft", &buf, 2011 &blen); 2012 nfscl_printopt(nmp, (nmp->nm_flag & NFSMNT_INT) != 0, ",intr", &buf, 2013 &blen); 2014 nfscl_printopt(nmp, (nmp->nm_flag & NFSMNT_NOCTO) == 0, ",cto", &buf, 2015 &blen); 2016 nfscl_printopt(nmp, (nmp->nm_flag & NFSMNT_NOCTO) != 0, ",nocto", &buf, 2017 &blen); 2018 nfscl_printopt(nmp, (nmp->nm_flag & NFSMNT_NONCONTIGWR) != 0, 2019 ",noncontigwr", &buf, &blen); 2020 nfscl_printopt(nmp, (nmp->nm_flag & (NFSMNT_NOLOCKD | NFSMNT_NFSV4)) == 2021 0, ",lockd", &buf, &blen); 2022 nfscl_printopt(nmp, (nmp->nm_flag & (NFSMNT_NOLOCKD | NFSMNT_NFSV4)) == 2023 NFSMNT_NOLOCKD, ",nolockd", &buf, &blen); 2024 nfscl_printopt(nmp, (nmp->nm_flag & NFSMNT_RDIRPLUS) != 0, ",rdirplus", 2025 &buf, &blen); 2026 nfscl_printopt(nmp, (nmp->nm_flag & NFSMNT_KERB) == 0, ",sec=sys", 2027 &buf, &blen); 2028 nfscl_printopt(nmp, (nmp->nm_flag & (NFSMNT_KERB | NFSMNT_INTEGRITY | 2029 NFSMNT_PRIVACY)) == NFSMNT_KERB, ",sec=krb5", &buf, &blen); 2030 nfscl_printopt(nmp, (nmp->nm_flag & (NFSMNT_KERB | NFSMNT_INTEGRITY | 2031 NFSMNT_PRIVACY)) == (NFSMNT_KERB | NFSMNT_INTEGRITY), ",sec=krb5i", 2032 &buf, &blen); 2033 nfscl_printopt(nmp, (nmp->nm_flag & (NFSMNT_KERB | NFSMNT_INTEGRITY | 2034 NFSMNT_PRIVACY)) == (NFSMNT_KERB | NFSMNT_PRIVACY), ",sec=krb5p", 2035 &buf, &blen); 2036 nfscl_printoptval(nmp, nmp->nm_acdirmin, ",acdirmin", &buf, &blen); 2037 nfscl_printoptval(nmp, nmp->nm_acdirmax, ",acdirmax", &buf, &blen); 2038 nfscl_printoptval(nmp, nmp->nm_acregmin, ",acregmin", &buf, &blen); 2039 nfscl_printoptval(nmp, nmp->nm_acregmax, ",acregmax", &buf, &blen); 2040 nfscl_printoptval(nmp, nmp->nm_nametimeo, ",nametimeo", &buf, &blen); 2041 nfscl_printoptval(nmp, nmp->nm_negnametimeo, ",negnametimeo", &buf, 2042 &blen); 2043 nfscl_printoptval(nmp, nmp->nm_rsize, ",rsize", &buf, &blen); 2044 nfscl_printoptval(nmp, nmp->nm_wsize, ",wsize", &buf, &blen); 2045 nfscl_printoptval(nmp, nmp->nm_readdirsize, ",readdirsize", &buf, 2046 &blen); 2047 nfscl_printoptval(nmp, nmp->nm_readahead, ",readahead", &buf, &blen); 2048 nfscl_printoptval(nmp, nmp->nm_wcommitsize, ",wcommitsize", &buf, 2049 &blen); 2050 nfscl_printoptval(nmp, nmp->nm_timeo, ",timeout", &buf, &blen); 2051 nfscl_printoptval(nmp, nmp->nm_retry, ",retrans", &buf, &blen); 2052 } 2053
Cache object: 024ecfd8e0d71a5cd83c1fe3a22f7020
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