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sys/fs/nfsclient/nfs_clvfsops.c
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1 /*- 2 * Copyright (c) 1989, 1993, 1995 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Rick Macklem at The University of Guelph. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 4. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * from nfs_vfsops.c 8.12 (Berkeley) 5/20/95 33 */ 34 35 #include <sys/cdefs.h> 36 __FBSDID("$FreeBSD: releng/10.3/sys/fs/nfsclient/nfs_clvfsops.c 291551 2015-12-01 02:30:41Z rmacklem $"); 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 extern int nfscl_debuglevel; 84 extern enum nfsiod_state ncl_iodwant[NFS_MAXASYNCDAEMON]; 85 extern struct nfsmount *ncl_iodmount[NFS_MAXASYNCDAEMON]; 86 extern struct mtx ncl_iod_mutex; 87 NFSCLSTATEMUTEX; 88 89 MALLOC_DEFINE(M_NEWNFSREQ, "newnfsclient_req", "New NFS request header"); 90 MALLOC_DEFINE(M_NEWNFSMNT, "newnfsmnt", "New NFS mount struct"); 91 92 SYSCTL_DECL(_vfs_nfs); 93 static int nfs_ip_paranoia = 1; 94 SYSCTL_INT(_vfs_nfs, OID_AUTO, nfs_ip_paranoia, CTLFLAG_RW, 95 &nfs_ip_paranoia, 0, ""); 96 static int nfs_tprintf_initial_delay = NFS_TPRINTF_INITIAL_DELAY; 97 SYSCTL_INT(_vfs_nfs, NFS_TPRINTF_INITIAL_DELAY, 98 downdelayinitial, CTLFLAG_RW, &nfs_tprintf_initial_delay, 0, ""); 99 /* how long between console messages "nfs server foo not responding" */ 100 static int nfs_tprintf_delay = NFS_TPRINTF_DELAY; 101 SYSCTL_INT(_vfs_nfs, NFS_TPRINTF_DELAY, 102 downdelayinterval, CTLFLAG_RW, &nfs_tprintf_delay, 0, ""); 103 104 static int nfs_mountroot(struct mount *); 105 static void nfs_sec_name(char *, int *); 106 static void nfs_decode_args(struct mount *mp, struct nfsmount *nmp, 107 struct nfs_args *argp, const char *, struct ucred *, 108 struct thread *); 109 static int mountnfs(struct nfs_args *, struct mount *, 110 struct sockaddr *, char *, u_char *, int, u_char *, int, 111 u_char *, int, struct vnode **, struct ucred *, 112 struct thread *, int, int, int); 113 static void nfs_getnlminfo(struct vnode *, uint8_t *, size_t *, 114 struct sockaddr_storage *, int *, off_t *, 115 struct timeval *); 116 static vfs_mount_t nfs_mount; 117 static vfs_cmount_t nfs_cmount; 118 static vfs_unmount_t nfs_unmount; 119 static vfs_root_t nfs_root; 120 static vfs_statfs_t nfs_statfs; 121 static vfs_sync_t nfs_sync; 122 static vfs_sysctl_t nfs_sysctl; 123 static vfs_purge_t nfs_purge; 124 125 /* 126 * nfs vfs operations. 127 */ 128 static struct vfsops nfs_vfsops = { 129 .vfs_init = ncl_init, 130 .vfs_mount = nfs_mount, 131 .vfs_cmount = nfs_cmount, 132 .vfs_root = nfs_root, 133 .vfs_statfs = nfs_statfs, 134 .vfs_sync = nfs_sync, 135 .vfs_uninit = ncl_uninit, 136 .vfs_unmount = nfs_unmount, 137 .vfs_sysctl = nfs_sysctl, 138 .vfs_purge = nfs_purge, 139 }; 140 VFS_SET(nfs_vfsops, nfs, VFCF_NETWORK | VFCF_SBDRY); 141 142 /* So that loader and kldload(2) can find us, wherever we are.. */ 143 MODULE_VERSION(nfs, 1); 144 MODULE_DEPEND(nfs, nfscommon, 1, 1, 1); 145 MODULE_DEPEND(nfs, krpc, 1, 1, 1); 146 MODULE_DEPEND(nfs, nfssvc, 1, 1, 1); 147 MODULE_DEPEND(nfs, nfslock, 1, 1, 1); 148 149 /* 150 * This structure is now defined in sys/nfs/nfs_diskless.c so that it 151 * can be shared by both NFS clients. It is declared here so that it 152 * will be defined for kernels built without NFS_ROOT, although it 153 * isn't used in that case. 154 */ 155 #if !defined(NFS_ROOT) && !defined(NFSCLIENT) 156 struct nfs_diskless nfs_diskless = { { { 0 } } }; 157 struct nfsv3_diskless nfsv3_diskless = { { { 0 } } }; 158 int nfs_diskless_valid = 0; 159 #endif 160 161 SYSCTL_INT(_vfs_nfs, OID_AUTO, diskless_valid, CTLFLAG_RD, 162 &nfs_diskless_valid, 0, 163 "Has the diskless struct been filled correctly"); 164 165 SYSCTL_STRING(_vfs_nfs, OID_AUTO, diskless_rootpath, CTLFLAG_RD, 166 nfsv3_diskless.root_hostnam, 0, "Path to nfs root"); 167 168 SYSCTL_OPAQUE(_vfs_nfs, OID_AUTO, diskless_rootaddr, CTLFLAG_RD, 169 &nfsv3_diskless.root_saddr, sizeof(nfsv3_diskless.root_saddr), 170 "%Ssockaddr_in", "Diskless root nfs address"); 171 172 173 void newnfsargs_ntoh(struct nfs_args *); 174 static int nfs_mountdiskless(char *, 175 struct sockaddr_in *, struct nfs_args *, 176 struct thread *, struct vnode **, struct mount *); 177 static void nfs_convert_diskless(void); 178 static void nfs_convert_oargs(struct nfs_args *args, 179 struct onfs_args *oargs); 180 181 int 182 newnfs_iosize(struct nfsmount *nmp) 183 { 184 int iosize, maxio; 185 186 /* First, set the upper limit for iosize */ 187 if (nmp->nm_flag & NFSMNT_NFSV4) { 188 maxio = NFS_MAXBSIZE; 189 } else if (nmp->nm_flag & NFSMNT_NFSV3) { 190 if (nmp->nm_sotype == SOCK_DGRAM) 191 maxio = NFS_MAXDGRAMDATA; 192 else 193 maxio = NFS_MAXBSIZE; 194 } else { 195 maxio = NFS_V2MAXDATA; 196 } 197 if (nmp->nm_rsize > maxio || nmp->nm_rsize == 0) 198 nmp->nm_rsize = maxio; 199 if (nmp->nm_rsize > NFS_MAXBSIZE) 200 nmp->nm_rsize = NFS_MAXBSIZE; 201 if (nmp->nm_readdirsize > maxio || nmp->nm_readdirsize == 0) 202 nmp->nm_readdirsize = maxio; 203 if (nmp->nm_readdirsize > nmp->nm_rsize) 204 nmp->nm_readdirsize = nmp->nm_rsize; 205 if (nmp->nm_wsize > maxio || nmp->nm_wsize == 0) 206 nmp->nm_wsize = maxio; 207 if (nmp->nm_wsize > NFS_MAXBSIZE) 208 nmp->nm_wsize = NFS_MAXBSIZE; 209 210 /* 211 * Calculate the size used for io buffers. Use the larger 212 * of the two sizes to minimise nfs requests but make sure 213 * that it is at least one VM page to avoid wasting buffer 214 * space. It must also be at least NFS_DIRBLKSIZ, since 215 * that is the buffer size used for directories. 216 */ 217 iosize = imax(nmp->nm_rsize, nmp->nm_wsize); 218 iosize = imax(iosize, PAGE_SIZE); 219 iosize = imax(iosize, NFS_DIRBLKSIZ); 220 nmp->nm_mountp->mnt_stat.f_iosize = iosize; 221 return (iosize); 222 } 223 224 static void 225 nfs_convert_oargs(struct nfs_args *args, struct onfs_args *oargs) 226 { 227 228 args->version = NFS_ARGSVERSION; 229 args->addr = oargs->addr; 230 args->addrlen = oargs->addrlen; 231 args->sotype = oargs->sotype; 232 args->proto = oargs->proto; 233 args->fh = oargs->fh; 234 args->fhsize = oargs->fhsize; 235 args->flags = oargs->flags; 236 args->wsize = oargs->wsize; 237 args->rsize = oargs->rsize; 238 args->readdirsize = oargs->readdirsize; 239 args->timeo = oargs->timeo; 240 args->retrans = oargs->retrans; 241 args->readahead = oargs->readahead; 242 args->hostname = oargs->hostname; 243 } 244 245 static void 246 nfs_convert_diskless(void) 247 { 248 249 bcopy(&nfs_diskless.myif, &nfsv3_diskless.myif, 250 sizeof(struct ifaliasreq)); 251 bcopy(&nfs_diskless.mygateway, &nfsv3_diskless.mygateway, 252 sizeof(struct sockaddr_in)); 253 nfs_convert_oargs(&nfsv3_diskless.root_args,&nfs_diskless.root_args); 254 if (nfsv3_diskless.root_args.flags & NFSMNT_NFSV3) { 255 nfsv3_diskless.root_fhsize = NFSX_MYFH; 256 bcopy(nfs_diskless.root_fh, nfsv3_diskless.root_fh, NFSX_MYFH); 257 } else { 258 nfsv3_diskless.root_fhsize = NFSX_V2FH; 259 bcopy(nfs_diskless.root_fh, nfsv3_diskless.root_fh, NFSX_V2FH); 260 } 261 bcopy(&nfs_diskless.root_saddr,&nfsv3_diskless.root_saddr, 262 sizeof(struct sockaddr_in)); 263 bcopy(nfs_diskless.root_hostnam, nfsv3_diskless.root_hostnam, MNAMELEN); 264 nfsv3_diskless.root_time = nfs_diskless.root_time; 265 bcopy(nfs_diskless.my_hostnam, nfsv3_diskless.my_hostnam, 266 MAXHOSTNAMELEN); 267 nfs_diskless_valid = 3; 268 } 269 270 /* 271 * nfs statfs call 272 */ 273 static int 274 nfs_statfs(struct mount *mp, struct statfs *sbp) 275 { 276 struct vnode *vp; 277 struct thread *td; 278 struct nfsmount *nmp = VFSTONFS(mp); 279 struct nfsvattr nfsva; 280 struct nfsfsinfo fs; 281 struct nfsstatfs sb; 282 int error = 0, attrflag, gotfsinfo = 0, ret; 283 struct nfsnode *np; 284 285 td = curthread; 286 287 error = vfs_busy(mp, MBF_NOWAIT); 288 if (error) 289 return (error); 290 error = ncl_nget(mp, nmp->nm_fh, nmp->nm_fhsize, &np, LK_EXCLUSIVE); 291 if (error) { 292 vfs_unbusy(mp); 293 return (error); 294 } 295 vp = NFSTOV(np); 296 mtx_lock(&nmp->nm_mtx); 297 if (NFSHASNFSV3(nmp) && !NFSHASGOTFSINFO(nmp)) { 298 mtx_unlock(&nmp->nm_mtx); 299 error = nfsrpc_fsinfo(vp, &fs, td->td_ucred, td, &nfsva, 300 &attrflag, NULL); 301 if (!error) 302 gotfsinfo = 1; 303 } else 304 mtx_unlock(&nmp->nm_mtx); 305 if (!error) 306 error = nfsrpc_statfs(vp, &sb, &fs, td->td_ucred, td, &nfsva, 307 &attrflag, NULL); 308 if (error != 0) 309 NFSCL_DEBUG(2, "statfs=%d\n", error); 310 if (attrflag == 0) { 311 ret = nfsrpc_getattrnovp(nmp, nmp->nm_fh, nmp->nm_fhsize, 1, 312 td->td_ucred, td, &nfsva, NULL, NULL); 313 if (ret) { 314 /* 315 * Just set default values to get things going. 316 */ 317 NFSBZERO((caddr_t)&nfsva, sizeof (struct nfsvattr)); 318 nfsva.na_vattr.va_type = VDIR; 319 nfsva.na_vattr.va_mode = 0777; 320 nfsva.na_vattr.va_nlink = 100; 321 nfsva.na_vattr.va_uid = (uid_t)0; 322 nfsva.na_vattr.va_gid = (gid_t)0; 323 nfsva.na_vattr.va_fileid = 2; 324 nfsva.na_vattr.va_gen = 1; 325 nfsva.na_vattr.va_blocksize = NFS_FABLKSIZE; 326 nfsva.na_vattr.va_size = 512 * 1024; 327 } 328 } 329 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1); 330 if (!error) { 331 mtx_lock(&nmp->nm_mtx); 332 if (gotfsinfo || (nmp->nm_flag & NFSMNT_NFSV4)) 333 nfscl_loadfsinfo(nmp, &fs); 334 nfscl_loadsbinfo(nmp, &sb, sbp); 335 sbp->f_iosize = newnfs_iosize(nmp); 336 mtx_unlock(&nmp->nm_mtx); 337 if (sbp != &mp->mnt_stat) { 338 bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN); 339 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); 340 } 341 strncpy(&sbp->f_fstypename[0], mp->mnt_vfc->vfc_name, MFSNAMELEN); 342 } else if (NFS_ISV4(vp)) { 343 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0); 344 } 345 vput(vp); 346 vfs_unbusy(mp); 347 return (error); 348 } 349 350 /* 351 * nfs version 3 fsinfo rpc call 352 */ 353 int 354 ncl_fsinfo(struct nfsmount *nmp, struct vnode *vp, struct ucred *cred, 355 struct thread *td) 356 { 357 struct nfsfsinfo fs; 358 struct nfsvattr nfsva; 359 int error, attrflag; 360 361 error = nfsrpc_fsinfo(vp, &fs, cred, td, &nfsva, &attrflag, NULL); 362 if (!error) { 363 if (attrflag) 364 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 365 1); 366 mtx_lock(&nmp->nm_mtx); 367 nfscl_loadfsinfo(nmp, &fs); 368 mtx_unlock(&nmp->nm_mtx); 369 } 370 return (error); 371 } 372 373 /* 374 * Mount a remote root fs via. nfs. This depends on the info in the 375 * nfs_diskless structure that has been filled in properly by some primary 376 * bootstrap. 377 * It goes something like this: 378 * - do enough of "ifconfig" by calling ifioctl() so that the system 379 * can talk to the server 380 * - If nfs_diskless.mygateway is filled in, use that address as 381 * a default gateway. 382 * - build the rootfs mount point and call mountnfs() to do the rest. 383 * 384 * It is assumed to be safe to read, modify, and write the nfsv3_diskless 385 * structure, as well as other global NFS client variables here, as 386 * nfs_mountroot() will be called once in the boot before any other NFS 387 * client activity occurs. 388 */ 389 static int 390 nfs_mountroot(struct mount *mp) 391 { 392 struct thread *td = curthread; 393 struct nfsv3_diskless *nd = &nfsv3_diskless; 394 struct socket *so; 395 struct vnode *vp; 396 struct ifreq ir; 397 int error; 398 u_long l; 399 char buf[128]; 400 char *cp; 401 402 #if defined(BOOTP_NFSROOT) && defined(BOOTP) 403 bootpc_init(); /* use bootp to get nfs_diskless filled in */ 404 #elif defined(NFS_ROOT) 405 nfs_setup_diskless(); 406 #endif 407 408 if (nfs_diskless_valid == 0) 409 return (-1); 410 if (nfs_diskless_valid == 1) 411 nfs_convert_diskless(); 412 413 /* 414 * XXX splnet, so networks will receive... 415 */ 416 splnet(); 417 418 /* 419 * Do enough of ifconfig(8) so that the critical net interface can 420 * talk to the server. 421 */ 422 error = socreate(nd->myif.ifra_addr.sa_family, &so, nd->root_args.sotype, 0, 423 td->td_ucred, td); 424 if (error) 425 panic("nfs_mountroot: socreate(%04x): %d", 426 nd->myif.ifra_addr.sa_family, error); 427 428 #if 0 /* XXX Bad idea */ 429 /* 430 * We might not have been told the right interface, so we pass 431 * over the first ten interfaces of the same kind, until we get 432 * one of them configured. 433 */ 434 435 for (i = strlen(nd->myif.ifra_name) - 1; 436 nd->myif.ifra_name[i] >= '' && 437 nd->myif.ifra_name[i] <= '9'; 438 nd->myif.ifra_name[i] ++) { 439 error = ifioctl(so, SIOCAIFADDR, (caddr_t)&nd->myif, td); 440 if(!error) 441 break; 442 } 443 #endif 444 error = ifioctl(so, SIOCAIFADDR, (caddr_t)&nd->myif, td); 445 if (error) 446 panic("nfs_mountroot: SIOCAIFADDR: %d", error); 447 if ((cp = getenv("boot.netif.mtu")) != NULL) { 448 ir.ifr_mtu = strtol(cp, NULL, 10); 449 bcopy(nd->myif.ifra_name, ir.ifr_name, IFNAMSIZ); 450 freeenv(cp); 451 error = ifioctl(so, SIOCSIFMTU, (caddr_t)&ir, td); 452 if (error) 453 printf("nfs_mountroot: SIOCSIFMTU: %d", error); 454 } 455 soclose(so); 456 457 /* 458 * If the gateway field is filled in, set it as the default route. 459 * Note that pxeboot will set a default route of 0 if the route 460 * is not set by the DHCP server. Check also for a value of 0 461 * to avoid panicking inappropriately in that situation. 462 */ 463 if (nd->mygateway.sin_len != 0 && 464 nd->mygateway.sin_addr.s_addr != 0) { 465 struct sockaddr_in mask, sin; 466 467 bzero((caddr_t)&mask, sizeof(mask)); 468 sin = mask; 469 sin.sin_family = AF_INET; 470 sin.sin_len = sizeof(sin); 471 /* XXX MRT use table 0 for this sort of thing */ 472 CURVNET_SET(TD_TO_VNET(td)); 473 error = rtrequest_fib(RTM_ADD, (struct sockaddr *)&sin, 474 (struct sockaddr *)&nd->mygateway, 475 (struct sockaddr *)&mask, 476 RTF_UP | RTF_GATEWAY, NULL, RT_DEFAULT_FIB); 477 CURVNET_RESTORE(); 478 if (error) 479 panic("nfs_mountroot: RTM_ADD: %d", error); 480 } 481 482 /* 483 * Create the rootfs mount point. 484 */ 485 nd->root_args.fh = nd->root_fh; 486 nd->root_args.fhsize = nd->root_fhsize; 487 l = ntohl(nd->root_saddr.sin_addr.s_addr); 488 snprintf(buf, sizeof(buf), "%ld.%ld.%ld.%ld:%s", 489 (l >> 24) & 0xff, (l >> 16) & 0xff, 490 (l >> 8) & 0xff, (l >> 0) & 0xff, nd->root_hostnam); 491 printf("NFS ROOT: %s\n", buf); 492 nd->root_args.hostname = buf; 493 if ((error = nfs_mountdiskless(buf, 494 &nd->root_saddr, &nd->root_args, td, &vp, mp)) != 0) { 495 return (error); 496 } 497 498 /* 499 * This is not really an nfs issue, but it is much easier to 500 * set hostname here and then let the "/etc/rc.xxx" files 501 * mount the right /var based upon its preset value. 502 */ 503 mtx_lock(&prison0.pr_mtx); 504 strlcpy(prison0.pr_hostname, nd->my_hostnam, 505 sizeof(prison0.pr_hostname)); 506 mtx_unlock(&prison0.pr_mtx); 507 inittodr(ntohl(nd->root_time)); 508 return (0); 509 } 510 511 /* 512 * Internal version of mount system call for diskless setup. 513 */ 514 static int 515 nfs_mountdiskless(char *path, 516 struct sockaddr_in *sin, struct nfs_args *args, struct thread *td, 517 struct vnode **vpp, struct mount *mp) 518 { 519 struct sockaddr *nam; 520 int dirlen, error; 521 char *dirpath; 522 523 /* 524 * Find the directory path in "path", which also has the server's 525 * name/ip address in it. 526 */ 527 dirpath = strchr(path, ':'); 528 if (dirpath != NULL) 529 dirlen = strlen(++dirpath); 530 else 531 dirlen = 0; 532 nam = sodupsockaddr((struct sockaddr *)sin, M_WAITOK); 533 if ((error = mountnfs(args, mp, nam, path, NULL, 0, dirpath, dirlen, 534 NULL, 0, vpp, td->td_ucred, td, NFS_DEFAULT_NAMETIMEO, 535 NFS_DEFAULT_NEGNAMETIMEO, 0)) != 0) { 536 printf("nfs_mountroot: mount %s on /: %d\n", path, error); 537 return (error); 538 } 539 return (0); 540 } 541 542 static void 543 nfs_sec_name(char *sec, int *flagsp) 544 { 545 if (!strcmp(sec, "krb5")) 546 *flagsp |= NFSMNT_KERB; 547 else if (!strcmp(sec, "krb5i")) 548 *flagsp |= (NFSMNT_KERB | NFSMNT_INTEGRITY); 549 else if (!strcmp(sec, "krb5p")) 550 *flagsp |= (NFSMNT_KERB | NFSMNT_PRIVACY); 551 } 552 553 static void 554 nfs_decode_args(struct mount *mp, struct nfsmount *nmp, struct nfs_args *argp, 555 const char *hostname, struct ucred *cred, struct thread *td) 556 { 557 int s; 558 int adjsock; 559 char *p; 560 561 s = splnet(); 562 563 /* 564 * Set read-only flag if requested; otherwise, clear it if this is 565 * an update. If this is not an update, then either the read-only 566 * flag is already clear, or this is a root mount and it was set 567 * intentionally at some previous point. 568 */ 569 if (vfs_getopt(mp->mnt_optnew, "ro", NULL, NULL) == 0) { 570 MNT_ILOCK(mp); 571 mp->mnt_flag |= MNT_RDONLY; 572 MNT_IUNLOCK(mp); 573 } else if (mp->mnt_flag & MNT_UPDATE) { 574 MNT_ILOCK(mp); 575 mp->mnt_flag &= ~MNT_RDONLY; 576 MNT_IUNLOCK(mp); 577 } 578 579 /* 580 * Silently clear NFSMNT_NOCONN if it's a TCP mount, it makes 581 * no sense in that context. Also, set up appropriate retransmit 582 * and soft timeout behavior. 583 */ 584 if (argp->sotype == SOCK_STREAM) { 585 nmp->nm_flag &= ~NFSMNT_NOCONN; 586 nmp->nm_timeo = NFS_MAXTIMEO; 587 if ((argp->flags & NFSMNT_NFSV4) != 0) 588 nmp->nm_retry = INT_MAX; 589 else 590 nmp->nm_retry = NFS_RETRANS_TCP; 591 } 592 593 /* Also clear RDIRPLUS if NFSv2, it crashes some servers */ 594 if ((argp->flags & (NFSMNT_NFSV3 | NFSMNT_NFSV4)) == 0) { 595 argp->flags &= ~NFSMNT_RDIRPLUS; 596 nmp->nm_flag &= ~NFSMNT_RDIRPLUS; 597 } 598 599 /* Re-bind if rsrvd port requested and wasn't on one */ 600 adjsock = !(nmp->nm_flag & NFSMNT_RESVPORT) 601 && (argp->flags & NFSMNT_RESVPORT); 602 /* Also re-bind if we're switching to/from a connected UDP socket */ 603 adjsock |= ((nmp->nm_flag & NFSMNT_NOCONN) != 604 (argp->flags & NFSMNT_NOCONN)); 605 606 /* Update flags atomically. Don't change the lock bits. */ 607 nmp->nm_flag = argp->flags | nmp->nm_flag; 608 splx(s); 609 610 if ((argp->flags & NFSMNT_TIMEO) && argp->timeo > 0) { 611 nmp->nm_timeo = (argp->timeo * NFS_HZ + 5) / 10; 612 if (nmp->nm_timeo < NFS_MINTIMEO) 613 nmp->nm_timeo = NFS_MINTIMEO; 614 else if (nmp->nm_timeo > NFS_MAXTIMEO) 615 nmp->nm_timeo = NFS_MAXTIMEO; 616 } 617 618 if ((argp->flags & NFSMNT_RETRANS) && argp->retrans > 1) { 619 nmp->nm_retry = argp->retrans; 620 if (nmp->nm_retry > NFS_MAXREXMIT) 621 nmp->nm_retry = NFS_MAXREXMIT; 622 } 623 624 if ((argp->flags & NFSMNT_WSIZE) && argp->wsize > 0) { 625 nmp->nm_wsize = argp->wsize; 626 /* 627 * Clip at the power of 2 below the size. There is an 628 * issue (not isolated) that causes intermittent page 629 * faults if this is not done. 630 */ 631 if (nmp->nm_wsize > NFS_FABLKSIZE) 632 nmp->nm_wsize = 1 << (fls(nmp->nm_wsize) - 1); 633 else 634 nmp->nm_wsize = NFS_FABLKSIZE; 635 } 636 637 if ((argp->flags & NFSMNT_RSIZE) && argp->rsize > 0) { 638 nmp->nm_rsize = argp->rsize; 639 /* 640 * Clip at the power of 2 below the size. There is an 641 * issue (not isolated) that causes intermittent page 642 * faults if this is not done. 643 */ 644 if (nmp->nm_rsize > NFS_FABLKSIZE) 645 nmp->nm_rsize = 1 << (fls(nmp->nm_rsize) - 1); 646 else 647 nmp->nm_rsize = NFS_FABLKSIZE; 648 } 649 650 if ((argp->flags & NFSMNT_READDIRSIZE) && argp->readdirsize > 0) { 651 nmp->nm_readdirsize = argp->readdirsize; 652 } 653 654 if ((argp->flags & NFSMNT_ACREGMIN) && argp->acregmin >= 0) 655 nmp->nm_acregmin = argp->acregmin; 656 else 657 nmp->nm_acregmin = NFS_MINATTRTIMO; 658 if ((argp->flags & NFSMNT_ACREGMAX) && argp->acregmax >= 0) 659 nmp->nm_acregmax = argp->acregmax; 660 else 661 nmp->nm_acregmax = NFS_MAXATTRTIMO; 662 if ((argp->flags & NFSMNT_ACDIRMIN) && argp->acdirmin >= 0) 663 nmp->nm_acdirmin = argp->acdirmin; 664 else 665 nmp->nm_acdirmin = NFS_MINDIRATTRTIMO; 666 if ((argp->flags & NFSMNT_ACDIRMAX) && argp->acdirmax >= 0) 667 nmp->nm_acdirmax = argp->acdirmax; 668 else 669 nmp->nm_acdirmax = NFS_MAXDIRATTRTIMO; 670 if (nmp->nm_acdirmin > nmp->nm_acdirmax) 671 nmp->nm_acdirmin = nmp->nm_acdirmax; 672 if (nmp->nm_acregmin > nmp->nm_acregmax) 673 nmp->nm_acregmin = nmp->nm_acregmax; 674 675 if ((argp->flags & NFSMNT_READAHEAD) && argp->readahead >= 0) { 676 if (argp->readahead <= NFS_MAXRAHEAD) 677 nmp->nm_readahead = argp->readahead; 678 else 679 nmp->nm_readahead = NFS_MAXRAHEAD; 680 } 681 if ((argp->flags & NFSMNT_WCOMMITSIZE) && argp->wcommitsize >= 0) { 682 if (argp->wcommitsize < nmp->nm_wsize) 683 nmp->nm_wcommitsize = nmp->nm_wsize; 684 else 685 nmp->nm_wcommitsize = argp->wcommitsize; 686 } 687 688 adjsock |= ((nmp->nm_sotype != argp->sotype) || 689 (nmp->nm_soproto != argp->proto)); 690 691 if (nmp->nm_client != NULL && adjsock) { 692 int haslock = 0, error = 0; 693 694 if (nmp->nm_sotype == SOCK_STREAM) { 695 error = newnfs_sndlock(&nmp->nm_sockreq.nr_lock); 696 if (!error) 697 haslock = 1; 698 } 699 if (!error) { 700 newnfs_disconnect(&nmp->nm_sockreq); 701 if (haslock) 702 newnfs_sndunlock(&nmp->nm_sockreq.nr_lock); 703 nmp->nm_sotype = argp->sotype; 704 nmp->nm_soproto = argp->proto; 705 if (nmp->nm_sotype == SOCK_DGRAM) 706 while (newnfs_connect(nmp, &nmp->nm_sockreq, 707 cred, td, 0)) { 708 printf("newnfs_args: retrying connect\n"); 709 (void) nfs_catnap(PSOCK, 0, "newnfscon"); 710 } 711 } 712 } else { 713 nmp->nm_sotype = argp->sotype; 714 nmp->nm_soproto = argp->proto; 715 } 716 717 if (hostname != NULL) { 718 strlcpy(nmp->nm_hostname, hostname, 719 sizeof(nmp->nm_hostname)); 720 p = strchr(nmp->nm_hostname, ':'); 721 if (p != NULL) 722 *p = '\0'; 723 } 724 } 725 726 static const char *nfs_opts[] = { "from", "nfs_args", 727 "noac", "noatime", "noexec", "suiddir", "nosuid", "nosymfollow", "union", 728 "noclusterr", "noclusterw", "multilabel", "acls", "force", "update", 729 "async", "noconn", "nolockd", "conn", "lockd", "intr", "rdirplus", 730 "readdirsize", "soft", "hard", "mntudp", "tcp", "udp", "wsize", "rsize", 731 "retrans", "actimeo", "acregmin", "acregmax", "acdirmin", "acdirmax", 732 "resvport", "readahead", "hostname", "timeo", "timeout", "addr", "fh", 733 "nfsv3", "sec", "principal", "nfsv4", "gssname", "allgssname", "dirpath", 734 "minorversion", "nametimeo", "negnametimeo", "nocto", "noncontigwr", 735 "pnfs", "wcommitsize", 736 NULL }; 737 738 /* 739 * VFS Operations. 740 * 741 * mount system call 742 * It seems a bit dumb to copyinstr() the host and path here and then 743 * bcopy() them in mountnfs(), but I wanted to detect errors before 744 * doing the sockargs() call because sockargs() allocates an mbuf and 745 * an error after that means that I have to release the mbuf. 746 */ 747 /* ARGSUSED */ 748 static int 749 nfs_mount(struct mount *mp) 750 { 751 struct nfs_args args = { 752 .version = NFS_ARGSVERSION, 753 .addr = NULL, 754 .addrlen = sizeof (struct sockaddr_in), 755 .sotype = SOCK_STREAM, 756 .proto = 0, 757 .fh = NULL, 758 .fhsize = 0, 759 .flags = NFSMNT_RESVPORT, 760 .wsize = NFS_WSIZE, 761 .rsize = NFS_RSIZE, 762 .readdirsize = NFS_READDIRSIZE, 763 .timeo = 10, 764 .retrans = NFS_RETRANS, 765 .readahead = NFS_DEFRAHEAD, 766 .wcommitsize = 0, /* was: NQ_DEFLEASE */ 767 .hostname = NULL, 768 .acregmin = NFS_MINATTRTIMO, 769 .acregmax = NFS_MAXATTRTIMO, 770 .acdirmin = NFS_MINDIRATTRTIMO, 771 .acdirmax = NFS_MAXDIRATTRTIMO, 772 }; 773 int error = 0, ret, len; 774 struct sockaddr *nam = NULL; 775 struct vnode *vp; 776 struct thread *td; 777 char hst[MNAMELEN]; 778 u_char nfh[NFSX_FHMAX], krbname[100], dirpath[100], srvkrbname[100]; 779 char *cp, *opt, *name, *secname; 780 int nametimeo = NFS_DEFAULT_NAMETIMEO; 781 int negnametimeo = NFS_DEFAULT_NEGNAMETIMEO; 782 int minvers = 0; 783 int dirlen, has_nfs_args_opt, krbnamelen, srvkrbnamelen; 784 size_t hstlen; 785 786 has_nfs_args_opt = 0; 787 if (vfs_filteropt(mp->mnt_optnew, nfs_opts)) { 788 error = EINVAL; 789 goto out; 790 } 791 792 td = curthread; 793 if ((mp->mnt_flag & (MNT_ROOTFS | MNT_UPDATE)) == MNT_ROOTFS) { 794 error = nfs_mountroot(mp); 795 goto out; 796 } 797 798 nfscl_init(); 799 800 /* 801 * The old mount_nfs program passed the struct nfs_args 802 * from userspace to kernel. The new mount_nfs program 803 * passes string options via nmount() from userspace to kernel 804 * and we populate the struct nfs_args in the kernel. 805 */ 806 if (vfs_getopt(mp->mnt_optnew, "nfs_args", NULL, NULL) == 0) { 807 error = vfs_copyopt(mp->mnt_optnew, "nfs_args", &args, 808 sizeof(args)); 809 if (error != 0) 810 goto out; 811 812 if (args.version != NFS_ARGSVERSION) { 813 error = EPROGMISMATCH; 814 goto out; 815 } 816 has_nfs_args_opt = 1; 817 } 818 819 /* Handle the new style options. */ 820 if (vfs_getopt(mp->mnt_optnew, "noac", NULL, NULL) == 0) { 821 args.acdirmin = args.acdirmax = 822 args.acregmin = args.acregmax = 0; 823 args.flags |= NFSMNT_ACDIRMIN | NFSMNT_ACDIRMAX | 824 NFSMNT_ACREGMIN | NFSMNT_ACREGMAX; 825 } 826 if (vfs_getopt(mp->mnt_optnew, "noconn", NULL, NULL) == 0) 827 args.flags |= NFSMNT_NOCONN; 828 if (vfs_getopt(mp->mnt_optnew, "conn", NULL, NULL) == 0) 829 args.flags &= ~NFSMNT_NOCONN; 830 if (vfs_getopt(mp->mnt_optnew, "nolockd", NULL, NULL) == 0) 831 args.flags |= NFSMNT_NOLOCKD; 832 if (vfs_getopt(mp->mnt_optnew, "lockd", NULL, NULL) == 0) 833 args.flags &= ~NFSMNT_NOLOCKD; 834 if (vfs_getopt(mp->mnt_optnew, "intr", NULL, NULL) == 0) 835 args.flags |= NFSMNT_INT; 836 if (vfs_getopt(mp->mnt_optnew, "rdirplus", NULL, NULL) == 0) 837 args.flags |= NFSMNT_RDIRPLUS; 838 if (vfs_getopt(mp->mnt_optnew, "resvport", NULL, NULL) == 0) 839 args.flags |= NFSMNT_RESVPORT; 840 if (vfs_getopt(mp->mnt_optnew, "noresvport", NULL, NULL) == 0) 841 args.flags &= ~NFSMNT_RESVPORT; 842 if (vfs_getopt(mp->mnt_optnew, "soft", NULL, NULL) == 0) 843 args.flags |= NFSMNT_SOFT; 844 if (vfs_getopt(mp->mnt_optnew, "hard", NULL, NULL) == 0) 845 args.flags &= ~NFSMNT_SOFT; 846 if (vfs_getopt(mp->mnt_optnew, "mntudp", NULL, NULL) == 0) 847 args.sotype = SOCK_DGRAM; 848 if (vfs_getopt(mp->mnt_optnew, "udp", NULL, NULL) == 0) 849 args.sotype = SOCK_DGRAM; 850 if (vfs_getopt(mp->mnt_optnew, "tcp", NULL, NULL) == 0) 851 args.sotype = SOCK_STREAM; 852 if (vfs_getopt(mp->mnt_optnew, "nfsv3", NULL, NULL) == 0) 853 args.flags |= NFSMNT_NFSV3; 854 if (vfs_getopt(mp->mnt_optnew, "nfsv4", NULL, NULL) == 0) { 855 args.flags |= NFSMNT_NFSV4; 856 args.sotype = SOCK_STREAM; 857 } 858 if (vfs_getopt(mp->mnt_optnew, "allgssname", NULL, NULL) == 0) 859 args.flags |= NFSMNT_ALLGSSNAME; 860 if (vfs_getopt(mp->mnt_optnew, "nocto", NULL, NULL) == 0) 861 args.flags |= NFSMNT_NOCTO; 862 if (vfs_getopt(mp->mnt_optnew, "noncontigwr", NULL, NULL) == 0) 863 args.flags |= NFSMNT_NONCONTIGWR; 864 if (vfs_getopt(mp->mnt_optnew, "pnfs", NULL, NULL) == 0) 865 args.flags |= NFSMNT_PNFS; 866 if (vfs_getopt(mp->mnt_optnew, "readdirsize", (void **)&opt, NULL) == 0) { 867 if (opt == NULL) { 868 vfs_mount_error(mp, "illegal readdirsize"); 869 error = EINVAL; 870 goto out; 871 } 872 ret = sscanf(opt, "%d", &args.readdirsize); 873 if (ret != 1 || args.readdirsize <= 0) { 874 vfs_mount_error(mp, "illegal readdirsize: %s", 875 opt); 876 error = EINVAL; 877 goto out; 878 } 879 args.flags |= NFSMNT_READDIRSIZE; 880 } 881 if (vfs_getopt(mp->mnt_optnew, "readahead", (void **)&opt, NULL) == 0) { 882 if (opt == NULL) { 883 vfs_mount_error(mp, "illegal readahead"); 884 error = EINVAL; 885 goto out; 886 } 887 ret = sscanf(opt, "%d", &args.readahead); 888 if (ret != 1 || args.readahead <= 0) { 889 vfs_mount_error(mp, "illegal readahead: %s", 890 opt); 891 error = EINVAL; 892 goto out; 893 } 894 args.flags |= NFSMNT_READAHEAD; 895 } 896 if (vfs_getopt(mp->mnt_optnew, "wsize", (void **)&opt, NULL) == 0) { 897 if (opt == NULL) { 898 vfs_mount_error(mp, "illegal wsize"); 899 error = EINVAL; 900 goto out; 901 } 902 ret = sscanf(opt, "%d", &args.wsize); 903 if (ret != 1 || args.wsize <= 0) { 904 vfs_mount_error(mp, "illegal wsize: %s", 905 opt); 906 error = EINVAL; 907 goto out; 908 } 909 args.flags |= NFSMNT_WSIZE; 910 } 911 if (vfs_getopt(mp->mnt_optnew, "rsize", (void **)&opt, NULL) == 0) { 912 if (opt == NULL) { 913 vfs_mount_error(mp, "illegal rsize"); 914 error = EINVAL; 915 goto out; 916 } 917 ret = sscanf(opt, "%d", &args.rsize); 918 if (ret != 1 || args.rsize <= 0) { 919 vfs_mount_error(mp, "illegal wsize: %s", 920 opt); 921 error = EINVAL; 922 goto out; 923 } 924 args.flags |= NFSMNT_RSIZE; 925 } 926 if (vfs_getopt(mp->mnt_optnew, "retrans", (void **)&opt, NULL) == 0) { 927 if (opt == NULL) { 928 vfs_mount_error(mp, "illegal retrans"); 929 error = EINVAL; 930 goto out; 931 } 932 ret = sscanf(opt, "%d", &args.retrans); 933 if (ret != 1 || args.retrans <= 0) { 934 vfs_mount_error(mp, "illegal retrans: %s", 935 opt); 936 error = EINVAL; 937 goto out; 938 } 939 args.flags |= NFSMNT_RETRANS; 940 } 941 if (vfs_getopt(mp->mnt_optnew, "actimeo", (void **)&opt, NULL) == 0) { 942 ret = sscanf(opt, "%d", &args.acregmin); 943 if (ret != 1 || args.acregmin < 0) { 944 vfs_mount_error(mp, "illegal actimeo: %s", 945 opt); 946 error = EINVAL; 947 goto out; 948 } 949 args.acdirmin = args.acdirmax = args.acregmax = args.acregmin; 950 args.flags |= NFSMNT_ACDIRMIN | NFSMNT_ACDIRMAX | 951 NFSMNT_ACREGMIN | NFSMNT_ACREGMAX; 952 } 953 if (vfs_getopt(mp->mnt_optnew, "acregmin", (void **)&opt, NULL) == 0) { 954 ret = sscanf(opt, "%d", &args.acregmin); 955 if (ret != 1 || args.acregmin < 0) { 956 vfs_mount_error(mp, "illegal acregmin: %s", 957 opt); 958 error = EINVAL; 959 goto out; 960 } 961 args.flags |= NFSMNT_ACREGMIN; 962 } 963 if (vfs_getopt(mp->mnt_optnew, "acregmax", (void **)&opt, NULL) == 0) { 964 ret = sscanf(opt, "%d", &args.acregmax); 965 if (ret != 1 || args.acregmax < 0) { 966 vfs_mount_error(mp, "illegal acregmax: %s", 967 opt); 968 error = EINVAL; 969 goto out; 970 } 971 args.flags |= NFSMNT_ACREGMAX; 972 } 973 if (vfs_getopt(mp->mnt_optnew, "acdirmin", (void **)&opt, NULL) == 0) { 974 ret = sscanf(opt, "%d", &args.acdirmin); 975 if (ret != 1 || args.acdirmin < 0) { 976 vfs_mount_error(mp, "illegal acdirmin: %s", 977 opt); 978 error = EINVAL; 979 goto out; 980 } 981 args.flags |= NFSMNT_ACDIRMIN; 982 } 983 if (vfs_getopt(mp->mnt_optnew, "acdirmax", (void **)&opt, NULL) == 0) { 984 ret = sscanf(opt, "%d", &args.acdirmax); 985 if (ret != 1 || args.acdirmax < 0) { 986 vfs_mount_error(mp, "illegal acdirmax: %s", 987 opt); 988 error = EINVAL; 989 goto out; 990 } 991 args.flags |= NFSMNT_ACDIRMAX; 992 } 993 if (vfs_getopt(mp->mnt_optnew, "wcommitsize", (void **)&opt, NULL) == 0) { 994 ret = sscanf(opt, "%d", &args.wcommitsize); 995 if (ret != 1 || args.wcommitsize < 0) { 996 vfs_mount_error(mp, "illegal wcommitsize: %s", opt); 997 error = EINVAL; 998 goto out; 999 } 1000 args.flags |= NFSMNT_WCOMMITSIZE; 1001 } 1002 if (vfs_getopt(mp->mnt_optnew, "timeo", (void **)&opt, NULL) == 0) { 1003 ret = sscanf(opt, "%d", &args.timeo); 1004 if (ret != 1 || args.timeo <= 0) { 1005 vfs_mount_error(mp, "illegal timeo: %s", 1006 opt); 1007 error = EINVAL; 1008 goto out; 1009 } 1010 args.flags |= NFSMNT_TIMEO; 1011 } 1012 if (vfs_getopt(mp->mnt_optnew, "timeout", (void **)&opt, NULL) == 0) { 1013 ret = sscanf(opt, "%d", &args.timeo); 1014 if (ret != 1 || args.timeo <= 0) { 1015 vfs_mount_error(mp, "illegal timeout: %s", 1016 opt); 1017 error = EINVAL; 1018 goto out; 1019 } 1020 args.flags |= NFSMNT_TIMEO; 1021 } 1022 if (vfs_getopt(mp->mnt_optnew, "nametimeo", (void **)&opt, NULL) == 0) { 1023 ret = sscanf(opt, "%d", &nametimeo); 1024 if (ret != 1 || nametimeo < 0) { 1025 vfs_mount_error(mp, "illegal nametimeo: %s", opt); 1026 error = EINVAL; 1027 goto out; 1028 } 1029 } 1030 if (vfs_getopt(mp->mnt_optnew, "negnametimeo", (void **)&opt, NULL) 1031 == 0) { 1032 ret = sscanf(opt, "%d", &negnametimeo); 1033 if (ret != 1 || negnametimeo < 0) { 1034 vfs_mount_error(mp, "illegal negnametimeo: %s", 1035 opt); 1036 error = EINVAL; 1037 goto out; 1038 } 1039 } 1040 if (vfs_getopt(mp->mnt_optnew, "minorversion", (void **)&opt, NULL) == 1041 0) { 1042 ret = sscanf(opt, "%d", &minvers); 1043 if (ret != 1 || minvers < 0 || minvers > 1 || 1044 (args.flags & NFSMNT_NFSV4) == 0) { 1045 vfs_mount_error(mp, "illegal minorversion: %s", opt); 1046 error = EINVAL; 1047 goto out; 1048 } 1049 } 1050 if (vfs_getopt(mp->mnt_optnew, "sec", 1051 (void **) &secname, NULL) == 0) 1052 nfs_sec_name(secname, &args.flags); 1053 1054 if (mp->mnt_flag & MNT_UPDATE) { 1055 struct nfsmount *nmp = VFSTONFS(mp); 1056 1057 if (nmp == NULL) { 1058 error = EIO; 1059 goto out; 1060 } 1061 1062 /* 1063 * If a change from TCP->UDP is done and there are thread(s) 1064 * that have I/O RPC(s) in progress with a tranfer size 1065 * greater than NFS_MAXDGRAMDATA, those thread(s) will be 1066 * hung, retrying the RPC(s) forever. Usually these threads 1067 * will be seen doing an uninterruptible sleep on wait channel 1068 * "newnfsreq" (truncated to "newnfsre" by procstat). 1069 */ 1070 if (args.sotype == SOCK_DGRAM && nmp->nm_sotype == SOCK_STREAM) 1071 tprintf(td->td_proc, LOG_WARNING, 1072 "Warning: mount -u that changes TCP->UDP can result in hung threads\n"); 1073 1074 /* 1075 * When doing an update, we can't change version, 1076 * security, switch lockd strategies or change cookie 1077 * translation 1078 */ 1079 args.flags = (args.flags & 1080 ~(NFSMNT_NFSV3 | 1081 NFSMNT_NFSV4 | 1082 NFSMNT_KERB | 1083 NFSMNT_INTEGRITY | 1084 NFSMNT_PRIVACY | 1085 NFSMNT_NOLOCKD /*|NFSMNT_XLATECOOKIE*/)) | 1086 (nmp->nm_flag & 1087 (NFSMNT_NFSV3 | 1088 NFSMNT_NFSV4 | 1089 NFSMNT_KERB | 1090 NFSMNT_INTEGRITY | 1091 NFSMNT_PRIVACY | 1092 NFSMNT_NOLOCKD /*|NFSMNT_XLATECOOKIE*/)); 1093 nfs_decode_args(mp, nmp, &args, NULL, td->td_ucred, td); 1094 goto out; 1095 } 1096 1097 /* 1098 * Make the nfs_ip_paranoia sysctl serve as the default connection 1099 * or no-connection mode for those protocols that support 1100 * no-connection mode (the flag will be cleared later for protocols 1101 * that do not support no-connection mode). This will allow a client 1102 * to receive replies from a different IP then the request was 1103 * sent to. Note: default value for nfs_ip_paranoia is 1 (paranoid), 1104 * not 0. 1105 */ 1106 if (nfs_ip_paranoia == 0) 1107 args.flags |= NFSMNT_NOCONN; 1108 1109 if (has_nfs_args_opt != 0) { 1110 /* 1111 * In the 'nfs_args' case, the pointers in the args 1112 * structure are in userland - we copy them in here. 1113 */ 1114 if (args.fhsize < 0 || args.fhsize > NFSX_V3FHMAX) { 1115 vfs_mount_error(mp, "Bad file handle"); 1116 error = EINVAL; 1117 goto out; 1118 } 1119 error = copyin((caddr_t)args.fh, (caddr_t)nfh, 1120 args.fhsize); 1121 if (error != 0) 1122 goto out; 1123 error = copyinstr(args.hostname, hst, MNAMELEN - 1, &hstlen); 1124 if (error != 0) 1125 goto out; 1126 bzero(&hst[hstlen], MNAMELEN - hstlen); 1127 args.hostname = hst; 1128 /* sockargs() call must be after above copyin() calls */ 1129 error = getsockaddr(&nam, (caddr_t)args.addr, 1130 args.addrlen); 1131 if (error != 0) 1132 goto out; 1133 } else { 1134 if (vfs_getopt(mp->mnt_optnew, "fh", (void **)&args.fh, 1135 &args.fhsize) == 0) { 1136 if (args.fhsize < 0 || args.fhsize > NFSX_FHMAX) { 1137 vfs_mount_error(mp, "Bad file handle"); 1138 error = EINVAL; 1139 goto out; 1140 } 1141 bcopy(args.fh, nfh, args.fhsize); 1142 } else { 1143 args.fhsize = 0; 1144 } 1145 (void) vfs_getopt(mp->mnt_optnew, "hostname", 1146 (void **)&args.hostname, &len); 1147 if (args.hostname == NULL) { 1148 vfs_mount_error(mp, "Invalid hostname"); 1149 error = EINVAL; 1150 goto out; 1151 } 1152 bcopy(args.hostname, hst, MNAMELEN); 1153 hst[MNAMELEN - 1] = '\0'; 1154 } 1155 1156 if (vfs_getopt(mp->mnt_optnew, "principal", (void **)&name, NULL) == 0) 1157 strlcpy(srvkrbname, name, sizeof (srvkrbname)); 1158 else { 1159 snprintf(srvkrbname, sizeof (srvkrbname), "nfs@%s", hst); 1160 cp = strchr(srvkrbname, ':'); 1161 if (cp != NULL) 1162 *cp = '\0'; 1163 } 1164 srvkrbnamelen = strlen(srvkrbname); 1165 1166 if (vfs_getopt(mp->mnt_optnew, "gssname", (void **)&name, NULL) == 0) 1167 strlcpy(krbname, name, sizeof (krbname)); 1168 else 1169 krbname[0] = '\0'; 1170 krbnamelen = strlen(krbname); 1171 1172 if (vfs_getopt(mp->mnt_optnew, "dirpath", (void **)&name, NULL) == 0) 1173 strlcpy(dirpath, name, sizeof (dirpath)); 1174 else 1175 dirpath[0] = '\0'; 1176 dirlen = strlen(dirpath); 1177 1178 if (has_nfs_args_opt == 0) { 1179 if (vfs_getopt(mp->mnt_optnew, "addr", 1180 (void **)&args.addr, &args.addrlen) == 0) { 1181 if (args.addrlen > SOCK_MAXADDRLEN) { 1182 error = ENAMETOOLONG; 1183 goto out; 1184 } 1185 nam = malloc(args.addrlen, M_SONAME, M_WAITOK); 1186 bcopy(args.addr, nam, args.addrlen); 1187 nam->sa_len = args.addrlen; 1188 } else { 1189 vfs_mount_error(mp, "No server address"); 1190 error = EINVAL; 1191 goto out; 1192 } 1193 } 1194 1195 args.fh = nfh; 1196 error = mountnfs(&args, mp, nam, hst, krbname, krbnamelen, dirpath, 1197 dirlen, srvkrbname, srvkrbnamelen, &vp, td->td_ucred, td, 1198 nametimeo, negnametimeo, minvers); 1199 out: 1200 if (!error) { 1201 MNT_ILOCK(mp); 1202 mp->mnt_kern_flag |= MNTK_LOOKUP_SHARED | MNTK_NO_IOPF | 1203 MNTK_USES_BCACHE; 1204 MNT_IUNLOCK(mp); 1205 } 1206 return (error); 1207 } 1208 1209 1210 /* 1211 * VFS Operations. 1212 * 1213 * mount system call 1214 * It seems a bit dumb to copyinstr() the host and path here and then 1215 * bcopy() them in mountnfs(), but I wanted to detect errors before 1216 * doing the sockargs() call because sockargs() allocates an mbuf and 1217 * an error after that means that I have to release the mbuf. 1218 */ 1219 /* ARGSUSED */ 1220 static int 1221 nfs_cmount(struct mntarg *ma, void *data, uint64_t flags) 1222 { 1223 int error; 1224 struct nfs_args args; 1225 1226 error = copyin(data, &args, sizeof (struct nfs_args)); 1227 if (error) 1228 return error; 1229 1230 ma = mount_arg(ma, "nfs_args", &args, sizeof args); 1231 1232 error = kernel_mount(ma, flags); 1233 return (error); 1234 } 1235 1236 /* 1237 * Common code for mount and mountroot 1238 */ 1239 static int 1240 mountnfs(struct nfs_args *argp, struct mount *mp, struct sockaddr *nam, 1241 char *hst, u_char *krbname, int krbnamelen, u_char *dirpath, int dirlen, 1242 u_char *srvkrbname, int srvkrbnamelen, struct vnode **vpp, 1243 struct ucred *cred, struct thread *td, int nametimeo, int negnametimeo, 1244 int minvers) 1245 { 1246 struct nfsmount *nmp; 1247 struct nfsnode *np; 1248 int error, trycnt, ret; 1249 struct nfsvattr nfsva; 1250 struct nfsclclient *clp; 1251 struct nfsclds *dsp, *tdsp; 1252 uint32_t lease; 1253 static u_int64_t clval = 0; 1254 1255 NFSCL_DEBUG(3, "in mnt\n"); 1256 clp = NULL; 1257 if (mp->mnt_flag & MNT_UPDATE) { 1258 nmp = VFSTONFS(mp); 1259 printf("%s: MNT_UPDATE is no longer handled here\n", __func__); 1260 FREE(nam, M_SONAME); 1261 return (0); 1262 } else { 1263 MALLOC(nmp, struct nfsmount *, sizeof (struct nfsmount) + 1264 krbnamelen + dirlen + srvkrbnamelen + 2, 1265 M_NEWNFSMNT, M_WAITOK | M_ZERO); 1266 TAILQ_INIT(&nmp->nm_bufq); 1267 if (clval == 0) 1268 clval = (u_int64_t)nfsboottime.tv_sec; 1269 nmp->nm_clval = clval++; 1270 nmp->nm_krbnamelen = krbnamelen; 1271 nmp->nm_dirpathlen = dirlen; 1272 nmp->nm_srvkrbnamelen = srvkrbnamelen; 1273 if (td->td_ucred->cr_uid != (uid_t)0) { 1274 /* 1275 * nm_uid is used to get KerberosV credentials for 1276 * the nfsv4 state handling operations if there is 1277 * no host based principal set. Use the uid of 1278 * this user if not root, since they are doing the 1279 * mount. I don't think setting this for root will 1280 * work, since root normally does not have user 1281 * credentials in a credentials cache. 1282 */ 1283 nmp->nm_uid = td->td_ucred->cr_uid; 1284 } else { 1285 /* 1286 * Just set to -1, so it won't be used. 1287 */ 1288 nmp->nm_uid = (uid_t)-1; 1289 } 1290 1291 /* Copy and null terminate all the names */ 1292 if (nmp->nm_krbnamelen > 0) { 1293 bcopy(krbname, nmp->nm_krbname, nmp->nm_krbnamelen); 1294 nmp->nm_name[nmp->nm_krbnamelen] = '\0'; 1295 } 1296 if (nmp->nm_dirpathlen > 0) { 1297 bcopy(dirpath, NFSMNT_DIRPATH(nmp), 1298 nmp->nm_dirpathlen); 1299 nmp->nm_name[nmp->nm_krbnamelen + nmp->nm_dirpathlen 1300 + 1] = '\0'; 1301 } 1302 if (nmp->nm_srvkrbnamelen > 0) { 1303 bcopy(srvkrbname, NFSMNT_SRVKRBNAME(nmp), 1304 nmp->nm_srvkrbnamelen); 1305 nmp->nm_name[nmp->nm_krbnamelen + nmp->nm_dirpathlen 1306 + nmp->nm_srvkrbnamelen + 2] = '\0'; 1307 } 1308 nmp->nm_sockreq.nr_cred = crhold(cred); 1309 mtx_init(&nmp->nm_sockreq.nr_mtx, "nfssock", NULL, MTX_DEF); 1310 mp->mnt_data = nmp; 1311 nmp->nm_getinfo = nfs_getnlminfo; 1312 nmp->nm_vinvalbuf = ncl_vinvalbuf; 1313 } 1314 vfs_getnewfsid(mp); 1315 nmp->nm_mountp = mp; 1316 mtx_init(&nmp->nm_mtx, "NFSmount lock", NULL, MTX_DEF | MTX_DUPOK); 1317 1318 /* 1319 * Since nfs_decode_args() might optionally set them, these 1320 * need to be set to defaults before the call, so that the 1321 * optional settings aren't overwritten. 1322 */ 1323 nmp->nm_nametimeo = nametimeo; 1324 nmp->nm_negnametimeo = negnametimeo; 1325 nmp->nm_timeo = NFS_TIMEO; 1326 nmp->nm_retry = NFS_RETRANS; 1327 nmp->nm_readahead = NFS_DEFRAHEAD; 1328 1329 /* This is empirical approximation of sqrt(hibufspace) * 256. */ 1330 nmp->nm_wcommitsize = NFS_MAXBSIZE / 256; 1331 while ((long)nmp->nm_wcommitsize * nmp->nm_wcommitsize < hibufspace) 1332 nmp->nm_wcommitsize *= 2; 1333 nmp->nm_wcommitsize *= 256; 1334 1335 if ((argp->flags & NFSMNT_NFSV4) != 0) 1336 nmp->nm_minorvers = minvers; 1337 else 1338 nmp->nm_minorvers = 0; 1339 1340 nfs_decode_args(mp, nmp, argp, hst, cred, td); 1341 1342 /* 1343 * V2 can only handle 32 bit filesizes. A 4GB-1 limit may be too 1344 * high, depending on whether we end up with negative offsets in 1345 * the client or server somewhere. 2GB-1 may be safer. 1346 * 1347 * For V3, ncl_fsinfo will adjust this as necessary. Assume maximum 1348 * that we can handle until we find out otherwise. 1349 */ 1350 if ((argp->flags & (NFSMNT_NFSV3 | NFSMNT_NFSV4)) == 0) 1351 nmp->nm_maxfilesize = 0xffffffffLL; 1352 else 1353 nmp->nm_maxfilesize = OFF_MAX; 1354 1355 if ((argp->flags & (NFSMNT_NFSV3 | NFSMNT_NFSV4)) == 0) { 1356 nmp->nm_wsize = NFS_WSIZE; 1357 nmp->nm_rsize = NFS_RSIZE; 1358 nmp->nm_readdirsize = NFS_READDIRSIZE; 1359 } 1360 nmp->nm_numgrps = NFS_MAXGRPS; 1361 nmp->nm_tprintf_delay = nfs_tprintf_delay; 1362 if (nmp->nm_tprintf_delay < 0) 1363 nmp->nm_tprintf_delay = 0; 1364 nmp->nm_tprintf_initial_delay = nfs_tprintf_initial_delay; 1365 if (nmp->nm_tprintf_initial_delay < 0) 1366 nmp->nm_tprintf_initial_delay = 0; 1367 nmp->nm_fhsize = argp->fhsize; 1368 if (nmp->nm_fhsize > 0) 1369 bcopy((caddr_t)argp->fh, (caddr_t)nmp->nm_fh, argp->fhsize); 1370 bcopy(hst, mp->mnt_stat.f_mntfromname, MNAMELEN); 1371 nmp->nm_nam = nam; 1372 /* Set up the sockets and per-host congestion */ 1373 nmp->nm_sotype = argp->sotype; 1374 nmp->nm_soproto = argp->proto; 1375 nmp->nm_sockreq.nr_prog = NFS_PROG; 1376 if ((argp->flags & NFSMNT_NFSV4)) 1377 nmp->nm_sockreq.nr_vers = NFS_VER4; 1378 else if ((argp->flags & NFSMNT_NFSV3)) 1379 nmp->nm_sockreq.nr_vers = NFS_VER3; 1380 else 1381 nmp->nm_sockreq.nr_vers = NFS_VER2; 1382 1383 1384 if ((error = newnfs_connect(nmp, &nmp->nm_sockreq, cred, td, 0))) 1385 goto bad; 1386 /* For NFSv4.1, get the clientid now. */ 1387 if (nmp->nm_minorvers > 0) { 1388 NFSCL_DEBUG(3, "at getcl\n"); 1389 error = nfscl_getcl(mp, cred, td, 0, &clp); 1390 NFSCL_DEBUG(3, "aft getcl=%d\n", error); 1391 if (error != 0) 1392 goto bad; 1393 } 1394 1395 if (nmp->nm_fhsize == 0 && (nmp->nm_flag & NFSMNT_NFSV4) && 1396 nmp->nm_dirpathlen > 0) { 1397 NFSCL_DEBUG(3, "in dirp\n"); 1398 /* 1399 * If the fhsize on the mount point == 0 for V4, the mount 1400 * path needs to be looked up. 1401 */ 1402 trycnt = 3; 1403 do { 1404 error = nfsrpc_getdirpath(nmp, NFSMNT_DIRPATH(nmp), 1405 cred, td); 1406 NFSCL_DEBUG(3, "aft dirp=%d\n", error); 1407 if (error) 1408 (void) nfs_catnap(PZERO, error, "nfsgetdirp"); 1409 } while (error && --trycnt > 0); 1410 if (error) { 1411 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0); 1412 goto bad; 1413 } 1414 } 1415 1416 /* 1417 * A reference count is needed on the nfsnode representing the 1418 * remote root. If this object is not persistent, then backward 1419 * traversals of the mount point (i.e. "..") will not work if 1420 * the nfsnode gets flushed out of the cache. Ufs does not have 1421 * this problem, because one can identify root inodes by their 1422 * number == ROOTINO (2). 1423 */ 1424 if (nmp->nm_fhsize > 0) { 1425 /* 1426 * Set f_iosize to NFS_DIRBLKSIZ so that bo_bsize gets set 1427 * non-zero for the root vnode. f_iosize will be set correctly 1428 * by nfs_statfs() before any I/O occurs. 1429 */ 1430 mp->mnt_stat.f_iosize = NFS_DIRBLKSIZ; 1431 error = ncl_nget(mp, nmp->nm_fh, nmp->nm_fhsize, &np, 1432 LK_EXCLUSIVE); 1433 if (error) 1434 goto bad; 1435 *vpp = NFSTOV(np); 1436 1437 /* 1438 * Get file attributes and transfer parameters for the 1439 * mountpoint. This has the side effect of filling in 1440 * (*vpp)->v_type with the correct value. 1441 */ 1442 ret = nfsrpc_getattrnovp(nmp, nmp->nm_fh, nmp->nm_fhsize, 1, 1443 cred, td, &nfsva, NULL, &lease); 1444 if (ret) { 1445 /* 1446 * Just set default values to get things going. 1447 */ 1448 NFSBZERO((caddr_t)&nfsva, sizeof (struct nfsvattr)); 1449 nfsva.na_vattr.va_type = VDIR; 1450 nfsva.na_vattr.va_mode = 0777; 1451 nfsva.na_vattr.va_nlink = 100; 1452 nfsva.na_vattr.va_uid = (uid_t)0; 1453 nfsva.na_vattr.va_gid = (gid_t)0; 1454 nfsva.na_vattr.va_fileid = 2; 1455 nfsva.na_vattr.va_gen = 1; 1456 nfsva.na_vattr.va_blocksize = NFS_FABLKSIZE; 1457 nfsva.na_vattr.va_size = 512 * 1024; 1458 lease = 60; 1459 } 1460 (void) nfscl_loadattrcache(vpp, &nfsva, NULL, NULL, 0, 1); 1461 if (nmp->nm_minorvers > 0) { 1462 NFSCL_DEBUG(3, "lease=%d\n", (int)lease); 1463 NFSLOCKCLSTATE(); 1464 clp->nfsc_renew = NFSCL_RENEW(lease); 1465 clp->nfsc_expire = NFSD_MONOSEC + clp->nfsc_renew; 1466 clp->nfsc_clientidrev++; 1467 if (clp->nfsc_clientidrev == 0) 1468 clp->nfsc_clientidrev++; 1469 NFSUNLOCKCLSTATE(); 1470 /* 1471 * Mount will succeed, so the renew thread can be 1472 * started now. 1473 */ 1474 nfscl_start_renewthread(clp); 1475 nfscl_clientrelease(clp); 1476 } 1477 if (argp->flags & NFSMNT_NFSV3) 1478 ncl_fsinfo(nmp, *vpp, cred, td); 1479 1480 /* Mark if the mount point supports NFSv4 ACLs. */ 1481 if ((argp->flags & NFSMNT_NFSV4) != 0 && nfsrv_useacl != 0 && 1482 ret == 0 && 1483 NFSISSET_ATTRBIT(&nfsva.na_suppattr, NFSATTRBIT_ACL)) { 1484 MNT_ILOCK(mp); 1485 mp->mnt_flag |= MNT_NFS4ACLS; 1486 MNT_IUNLOCK(mp); 1487 } 1488 1489 /* 1490 * Lose the lock but keep the ref. 1491 */ 1492 NFSVOPUNLOCK(*vpp, 0); 1493 return (0); 1494 } 1495 error = EIO; 1496 1497 bad: 1498 if (clp != NULL) 1499 nfscl_clientrelease(clp); 1500 newnfs_disconnect(&nmp->nm_sockreq); 1501 crfree(nmp->nm_sockreq.nr_cred); 1502 if (nmp->nm_sockreq.nr_auth != NULL) 1503 AUTH_DESTROY(nmp->nm_sockreq.nr_auth); 1504 mtx_destroy(&nmp->nm_sockreq.nr_mtx); 1505 mtx_destroy(&nmp->nm_mtx); 1506 if (nmp->nm_clp != NULL) { 1507 NFSLOCKCLSTATE(); 1508 LIST_REMOVE(nmp->nm_clp, nfsc_list); 1509 NFSUNLOCKCLSTATE(); 1510 free(nmp->nm_clp, M_NFSCLCLIENT); 1511 } 1512 TAILQ_FOREACH_SAFE(dsp, &nmp->nm_sess, nfsclds_list, tdsp) 1513 nfscl_freenfsclds(dsp); 1514 FREE(nmp, M_NEWNFSMNT); 1515 FREE(nam, M_SONAME); 1516 return (error); 1517 } 1518 1519 /* 1520 * unmount system call 1521 */ 1522 static int 1523 nfs_unmount(struct mount *mp, int mntflags) 1524 { 1525 struct thread *td; 1526 struct nfsmount *nmp; 1527 int error, flags = 0, i, trycnt = 0; 1528 struct nfsclds *dsp, *tdsp; 1529 1530 td = curthread; 1531 1532 if (mntflags & MNT_FORCE) 1533 flags |= FORCECLOSE; 1534 nmp = VFSTONFS(mp); 1535 /* 1536 * Goes something like this.. 1537 * - Call vflush() to clear out vnodes for this filesystem 1538 * - Close the socket 1539 * - Free up the data structures 1540 */ 1541 /* In the forced case, cancel any outstanding requests. */ 1542 if (mntflags & MNT_FORCE) { 1543 error = newnfs_nmcancelreqs(nmp); 1544 if (error) 1545 goto out; 1546 /* For a forced close, get rid of the renew thread now */ 1547 nfscl_umount(nmp, td); 1548 } 1549 /* We hold 1 extra ref on the root vnode; see comment in mountnfs(). */ 1550 do { 1551 error = vflush(mp, 1, flags, td); 1552 if ((mntflags & MNT_FORCE) && error != 0 && ++trycnt < 30) 1553 (void) nfs_catnap(PSOCK, error, "newndm"); 1554 } while ((mntflags & MNT_FORCE) && error != 0 && trycnt < 30); 1555 if (error) 1556 goto out; 1557 1558 /* 1559 * We are now committed to the unmount. 1560 */ 1561 if ((mntflags & MNT_FORCE) == 0) 1562 nfscl_umount(nmp, td); 1563 /* Make sure no nfsiods are assigned to this mount. */ 1564 mtx_lock(&ncl_iod_mutex); 1565 for (i = 0; i < NFS_MAXASYNCDAEMON; i++) 1566 if (ncl_iodmount[i] == nmp) { 1567 ncl_iodwant[i] = NFSIOD_AVAILABLE; 1568 ncl_iodmount[i] = NULL; 1569 } 1570 mtx_unlock(&ncl_iod_mutex); 1571 newnfs_disconnect(&nmp->nm_sockreq); 1572 crfree(nmp->nm_sockreq.nr_cred); 1573 FREE(nmp->nm_nam, M_SONAME); 1574 if (nmp->nm_sockreq.nr_auth != NULL) 1575 AUTH_DESTROY(nmp->nm_sockreq.nr_auth); 1576 mtx_destroy(&nmp->nm_sockreq.nr_mtx); 1577 mtx_destroy(&nmp->nm_mtx); 1578 TAILQ_FOREACH_SAFE(dsp, &nmp->nm_sess, nfsclds_list, tdsp) 1579 nfscl_freenfsclds(dsp); 1580 FREE(nmp, M_NEWNFSMNT); 1581 out: 1582 return (error); 1583 } 1584 1585 /* 1586 * Return root of a filesystem 1587 */ 1588 static int 1589 nfs_root(struct mount *mp, int flags, struct vnode **vpp) 1590 { 1591 struct vnode *vp; 1592 struct nfsmount *nmp; 1593 struct nfsnode *np; 1594 int error; 1595 1596 nmp = VFSTONFS(mp); 1597 error = ncl_nget(mp, nmp->nm_fh, nmp->nm_fhsize, &np, flags); 1598 if (error) 1599 return error; 1600 vp = NFSTOV(np); 1601 /* 1602 * Get transfer parameters and attributes for root vnode once. 1603 */ 1604 mtx_lock(&nmp->nm_mtx); 1605 if (NFSHASNFSV3(nmp) && !NFSHASGOTFSINFO(nmp)) { 1606 mtx_unlock(&nmp->nm_mtx); 1607 ncl_fsinfo(nmp, vp, curthread->td_ucred, curthread); 1608 } else 1609 mtx_unlock(&nmp->nm_mtx); 1610 if (vp->v_type == VNON) 1611 vp->v_type = VDIR; 1612 vp->v_vflag |= VV_ROOT; 1613 *vpp = vp; 1614 return (0); 1615 } 1616 1617 /* 1618 * Flush out the buffer cache 1619 */ 1620 /* ARGSUSED */ 1621 static int 1622 nfs_sync(struct mount *mp, int waitfor) 1623 { 1624 struct vnode *vp, *mvp; 1625 struct thread *td; 1626 int error, allerror = 0; 1627 1628 td = curthread; 1629 1630 MNT_ILOCK(mp); 1631 /* 1632 * If a forced dismount is in progress, return from here so that 1633 * the umount(2) syscall doesn't get stuck in VFS_SYNC() before 1634 * calling VFS_UNMOUNT(). 1635 */ 1636 if ((mp->mnt_kern_flag & MNTK_UNMOUNTF) != 0) { 1637 MNT_IUNLOCK(mp); 1638 return (EBADF); 1639 } 1640 MNT_IUNLOCK(mp); 1641 1642 /* 1643 * Force stale buffer cache information to be flushed. 1644 */ 1645 loop: 1646 MNT_VNODE_FOREACH_ALL(vp, mp, mvp) { 1647 /* XXX Racy bv_cnt check. */ 1648 if (NFSVOPISLOCKED(vp) || vp->v_bufobj.bo_dirty.bv_cnt == 0 || 1649 waitfor == MNT_LAZY) { 1650 VI_UNLOCK(vp); 1651 continue; 1652 } 1653 if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK, td)) { 1654 MNT_VNODE_FOREACH_ALL_ABORT(mp, mvp); 1655 goto loop; 1656 } 1657 error = VOP_FSYNC(vp, waitfor, td); 1658 if (error) 1659 allerror = error; 1660 NFSVOPUNLOCK(vp, 0); 1661 vrele(vp); 1662 } 1663 return (allerror); 1664 } 1665 1666 static int 1667 nfs_sysctl(struct mount *mp, fsctlop_t op, struct sysctl_req *req) 1668 { 1669 struct nfsmount *nmp = VFSTONFS(mp); 1670 struct vfsquery vq; 1671 int error; 1672 1673 bzero(&vq, sizeof(vq)); 1674 switch (op) { 1675 #if 0 1676 case VFS_CTL_NOLOCKS: 1677 val = (nmp->nm_flag & NFSMNT_NOLOCKS) ? 1 : 0; 1678 if (req->oldptr != NULL) { 1679 error = SYSCTL_OUT(req, &val, sizeof(val)); 1680 if (error) 1681 return (error); 1682 } 1683 if (req->newptr != NULL) { 1684 error = SYSCTL_IN(req, &val, sizeof(val)); 1685 if (error) 1686 return (error); 1687 if (val) 1688 nmp->nm_flag |= NFSMNT_NOLOCKS; 1689 else 1690 nmp->nm_flag &= ~NFSMNT_NOLOCKS; 1691 } 1692 break; 1693 #endif 1694 case VFS_CTL_QUERY: 1695 mtx_lock(&nmp->nm_mtx); 1696 if (nmp->nm_state & NFSSTA_TIMEO) 1697 vq.vq_flags |= VQ_NOTRESP; 1698 mtx_unlock(&nmp->nm_mtx); 1699 #if 0 1700 if (!(nmp->nm_flag & NFSMNT_NOLOCKS) && 1701 (nmp->nm_state & NFSSTA_LOCKTIMEO)) 1702 vq.vq_flags |= VQ_NOTRESPLOCK; 1703 #endif 1704 error = SYSCTL_OUT(req, &vq, sizeof(vq)); 1705 break; 1706 case VFS_CTL_TIMEO: 1707 if (req->oldptr != NULL) { 1708 error = SYSCTL_OUT(req, &nmp->nm_tprintf_initial_delay, 1709 sizeof(nmp->nm_tprintf_initial_delay)); 1710 if (error) 1711 return (error); 1712 } 1713 if (req->newptr != NULL) { 1714 error = vfs_suser(mp, req->td); 1715 if (error) 1716 return (error); 1717 error = SYSCTL_IN(req, &nmp->nm_tprintf_initial_delay, 1718 sizeof(nmp->nm_tprintf_initial_delay)); 1719 if (error) 1720 return (error); 1721 if (nmp->nm_tprintf_initial_delay < 0) 1722 nmp->nm_tprintf_initial_delay = 0; 1723 } 1724 break; 1725 default: 1726 return (ENOTSUP); 1727 } 1728 return (0); 1729 } 1730 1731 /* 1732 * Purge any RPCs in progress, so that they will all return errors. 1733 * This allows dounmount() to continue as far as VFS_UNMOUNT() for a 1734 * forced dismount. 1735 */ 1736 static void 1737 nfs_purge(struct mount *mp) 1738 { 1739 struct nfsmount *nmp = VFSTONFS(mp); 1740 1741 newnfs_nmcancelreqs(nmp); 1742 } 1743 1744 /* 1745 * Extract the information needed by the nlm from the nfs vnode. 1746 */ 1747 static void 1748 nfs_getnlminfo(struct vnode *vp, uint8_t *fhp, size_t *fhlenp, 1749 struct sockaddr_storage *sp, int *is_v3p, off_t *sizep, 1750 struct timeval *timeop) 1751 { 1752 struct nfsmount *nmp; 1753 struct nfsnode *np = VTONFS(vp); 1754 1755 nmp = VFSTONFS(vp->v_mount); 1756 if (fhlenp != NULL) 1757 *fhlenp = (size_t)np->n_fhp->nfh_len; 1758 if (fhp != NULL) 1759 bcopy(np->n_fhp->nfh_fh, fhp, np->n_fhp->nfh_len); 1760 if (sp != NULL) 1761 bcopy(nmp->nm_nam, sp, min(nmp->nm_nam->sa_len, sizeof(*sp))); 1762 if (is_v3p != NULL) 1763 *is_v3p = NFS_ISV3(vp); 1764 if (sizep != NULL) 1765 *sizep = np->n_size; 1766 if (timeop != NULL) { 1767 timeop->tv_sec = nmp->nm_timeo / NFS_HZ; 1768 timeop->tv_usec = (nmp->nm_timeo % NFS_HZ) * (1000000 / NFS_HZ); 1769 } 1770 } 1771 1772 /* 1773 * This function prints out an option name, based on the conditional 1774 * argument. 1775 */ 1776 static __inline void nfscl_printopt(struct nfsmount *nmp, int testval, 1777 char *opt, char **buf, size_t *blen) 1778 { 1779 int len; 1780 1781 if (testval != 0 && *blen > strlen(opt)) { 1782 len = snprintf(*buf, *blen, "%s", opt); 1783 if (len != strlen(opt)) 1784 printf("EEK!!\n"); 1785 *buf += len; 1786 *blen -= len; 1787 } 1788 } 1789 1790 /* 1791 * This function printf out an options integer value. 1792 */ 1793 static __inline void nfscl_printoptval(struct nfsmount *nmp, int optval, 1794 char *opt, char **buf, size_t *blen) 1795 { 1796 int len; 1797 1798 if (*blen > strlen(opt) + 1) { 1799 /* Could result in truncated output string. */ 1800 len = snprintf(*buf, *blen, "%s=%d", opt, optval); 1801 if (len < *blen) { 1802 *buf += len; 1803 *blen -= len; 1804 } 1805 } 1806 } 1807 1808 /* 1809 * Load the option flags and values into the buffer. 1810 */ 1811 void nfscl_retopts(struct nfsmount *nmp, char *buffer, size_t buflen) 1812 { 1813 char *buf; 1814 size_t blen; 1815 1816 buf = buffer; 1817 blen = buflen; 1818 nfscl_printopt(nmp, (nmp->nm_flag & NFSMNT_NFSV4) != 0, "nfsv4", &buf, 1819 &blen); 1820 if ((nmp->nm_flag & NFSMNT_NFSV4) != 0) { 1821 nfscl_printoptval(nmp, nmp->nm_minorvers, ",minorversion", &buf, 1822 &blen); 1823 nfscl_printopt(nmp, (nmp->nm_flag & NFSMNT_PNFS) != 0, ",pnfs", 1824 &buf, &blen); 1825 } 1826 nfscl_printopt(nmp, (nmp->nm_flag & NFSMNT_NFSV3) != 0, "nfsv3", &buf, 1827 &blen); 1828 nfscl_printopt(nmp, (nmp->nm_flag & (NFSMNT_NFSV3 | NFSMNT_NFSV4)) == 0, 1829 "nfsv2", &buf, &blen); 1830 nfscl_printopt(nmp, nmp->nm_sotype == SOCK_STREAM, ",tcp", &buf, &blen); 1831 nfscl_printopt(nmp, nmp->nm_sotype != SOCK_STREAM, ",udp", &buf, &blen); 1832 nfscl_printopt(nmp, (nmp->nm_flag & NFSMNT_RESVPORT) != 0, ",resvport", 1833 &buf, &blen); 1834 nfscl_printopt(nmp, (nmp->nm_flag & NFSMNT_NOCONN) != 0, ",noconn", 1835 &buf, &blen); 1836 nfscl_printopt(nmp, (nmp->nm_flag & NFSMNT_SOFT) == 0, ",hard", &buf, 1837 &blen); 1838 nfscl_printopt(nmp, (nmp->nm_flag & NFSMNT_SOFT) != 0, ",soft", &buf, 1839 &blen); 1840 nfscl_printopt(nmp, (nmp->nm_flag & NFSMNT_INT) != 0, ",intr", &buf, 1841 &blen); 1842 nfscl_printopt(nmp, (nmp->nm_flag & NFSMNT_NOCTO) == 0, ",cto", &buf, 1843 &blen); 1844 nfscl_printopt(nmp, (nmp->nm_flag & NFSMNT_NOCTO) != 0, ",nocto", &buf, 1845 &blen); 1846 nfscl_printopt(nmp, (nmp->nm_flag & NFSMNT_NONCONTIGWR) != 0, 1847 ",noncontigwr", &buf, &blen); 1848 nfscl_printopt(nmp, (nmp->nm_flag & (NFSMNT_NOLOCKD | NFSMNT_NFSV4)) == 1849 0, ",lockd", &buf, &blen); 1850 nfscl_printopt(nmp, (nmp->nm_flag & (NFSMNT_NOLOCKD | NFSMNT_NFSV4)) == 1851 NFSMNT_NOLOCKD, ",nolockd", &buf, &blen); 1852 nfscl_printopt(nmp, (nmp->nm_flag & NFSMNT_RDIRPLUS) != 0, ",rdirplus", 1853 &buf, &blen); 1854 nfscl_printopt(nmp, (nmp->nm_flag & NFSMNT_KERB) == 0, ",sec=sys", 1855 &buf, &blen); 1856 nfscl_printopt(nmp, (nmp->nm_flag & (NFSMNT_KERB | NFSMNT_INTEGRITY | 1857 NFSMNT_PRIVACY)) == NFSMNT_KERB, ",sec=krb5", &buf, &blen); 1858 nfscl_printopt(nmp, (nmp->nm_flag & (NFSMNT_KERB | NFSMNT_INTEGRITY | 1859 NFSMNT_PRIVACY)) == (NFSMNT_KERB | NFSMNT_INTEGRITY), ",sec=krb5i", 1860 &buf, &blen); 1861 nfscl_printopt(nmp, (nmp->nm_flag & (NFSMNT_KERB | NFSMNT_INTEGRITY | 1862 NFSMNT_PRIVACY)) == (NFSMNT_KERB | NFSMNT_PRIVACY), ",sec=krb5p", 1863 &buf, &blen); 1864 nfscl_printoptval(nmp, nmp->nm_acdirmin, ",acdirmin", &buf, &blen); 1865 nfscl_printoptval(nmp, nmp->nm_acdirmax, ",acdirmax", &buf, &blen); 1866 nfscl_printoptval(nmp, nmp->nm_acregmin, ",acregmin", &buf, &blen); 1867 nfscl_printoptval(nmp, nmp->nm_acregmax, ",acregmax", &buf, &blen); 1868 nfscl_printoptval(nmp, nmp->nm_nametimeo, ",nametimeo", &buf, &blen); 1869 nfscl_printoptval(nmp, nmp->nm_negnametimeo, ",negnametimeo", &buf, 1870 &blen); 1871 nfscl_printoptval(nmp, nmp->nm_rsize, ",rsize", &buf, &blen); 1872 nfscl_printoptval(nmp, nmp->nm_wsize, ",wsize", &buf, &blen); 1873 nfscl_printoptval(nmp, nmp->nm_readdirsize, ",readdirsize", &buf, 1874 &blen); 1875 nfscl_printoptval(nmp, nmp->nm_readahead, ",readahead", &buf, &blen); 1876 nfscl_printoptval(nmp, nmp->nm_wcommitsize, ",wcommitsize", &buf, 1877 &blen); 1878 nfscl_printoptval(nmp, nmp->nm_timeo, ",timeout", &buf, &blen); 1879 nfscl_printoptval(nmp, nmp->nm_retry, ",retrans", &buf, &blen); 1880 } 1881
Cache object: 5cb0f47586728c99f4dc2a71b53f9754
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