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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/11.2/sys/fs/nfsclient/nfs_clvfsops.c 331722 2018-03-29 02:50:57Z eadler $"); 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 int nfsrv_useacl; 82 extern int nfscl_debuglevel; 83 extern enum nfsiod_state ncl_iodwant[NFS_MAXASYNCDAEMON]; 84 extern struct nfsmount *ncl_iodmount[NFS_MAXASYNCDAEMON]; 85 extern struct mtx ncl_iod_mutex; 86 NFSCLSTATEMUTEX; 87 88 MALLOC_DEFINE(M_NEWNFSREQ, "newnfsclient_req", "NFS request header"); 89 MALLOC_DEFINE(M_NEWNFSMNT, "newnfsmnt", "NFS mount struct"); 90 91 SYSCTL_DECL(_vfs_nfs); 92 static int nfs_ip_paranoia = 1; 93 SYSCTL_INT(_vfs_nfs, OID_AUTO, nfs_ip_paranoia, CTLFLAG_RW, 94 &nfs_ip_paranoia, 0, ""); 95 static int nfs_tprintf_initial_delay = NFS_TPRINTF_INITIAL_DELAY; 96 SYSCTL_INT(_vfs_nfs, NFS_TPRINTF_INITIAL_DELAY, 97 downdelayinitial, CTLFLAG_RW, &nfs_tprintf_initial_delay, 0, ""); 98 /* how long between console messages "nfs server foo not responding" */ 99 static int nfs_tprintf_delay = NFS_TPRINTF_DELAY; 100 SYSCTL_INT(_vfs_nfs, NFS_TPRINTF_DELAY, 101 downdelayinterval, CTLFLAG_RW, &nfs_tprintf_delay, 0, ""); 102 #ifdef NFS_DEBUG 103 int nfs_debug; 104 SYSCTL_INT(_vfs_nfs, OID_AUTO, debug, CTLFLAG_RW, &nfs_debug, 0, 105 "Toggle debug flag"); 106 #endif 107 108 static int nfs_mountroot(struct mount *); 109 static void nfs_sec_name(char *, int *); 110 static void nfs_decode_args(struct mount *mp, struct nfsmount *nmp, 111 struct nfs_args *argp, const char *, struct ucred *, 112 struct thread *); 113 static int mountnfs(struct nfs_args *, struct mount *, 114 struct sockaddr *, char *, u_char *, int, u_char *, int, 115 u_char *, int, struct vnode **, struct ucred *, 116 struct thread *, int, int, int); 117 static void nfs_getnlminfo(struct vnode *, uint8_t *, size_t *, 118 struct sockaddr_storage *, int *, off_t *, 119 struct timeval *); 120 static vfs_mount_t nfs_mount; 121 static vfs_cmount_t nfs_cmount; 122 static vfs_unmount_t nfs_unmount; 123 static vfs_root_t nfs_root; 124 static vfs_statfs_t nfs_statfs; 125 static vfs_sync_t nfs_sync; 126 static vfs_sysctl_t nfs_sysctl; 127 static vfs_purge_t nfs_purge; 128 129 /* 130 * nfs vfs operations. 131 */ 132 static struct vfsops nfs_vfsops = { 133 .vfs_init = ncl_init, 134 .vfs_mount = nfs_mount, 135 .vfs_cmount = nfs_cmount, 136 .vfs_root = nfs_root, 137 .vfs_statfs = nfs_statfs, 138 .vfs_sync = nfs_sync, 139 .vfs_uninit = ncl_uninit, 140 .vfs_unmount = nfs_unmount, 141 .vfs_sysctl = nfs_sysctl, 142 .vfs_purge = nfs_purge, 143 }; 144 VFS_SET(nfs_vfsops, nfs, VFCF_NETWORK | VFCF_SBDRY); 145 146 /* So that loader and kldload(2) can find us, wherever we are.. */ 147 MODULE_VERSION(nfs, 1); 148 MODULE_DEPEND(nfs, nfscommon, 1, 1, 1); 149 MODULE_DEPEND(nfs, krpc, 1, 1, 1); 150 MODULE_DEPEND(nfs, nfssvc, 1, 1, 1); 151 MODULE_DEPEND(nfs, nfslock, 1, 1, 1); 152 153 /* 154 * This structure is now defined in sys/nfs/nfs_diskless.c so that it 155 * can be shared by both NFS clients. It is declared here so that it 156 * will be defined for kernels built without NFS_ROOT, although it 157 * isn't used in that case. 158 */ 159 #if !defined(NFS_ROOT) 160 struct nfs_diskless nfs_diskless = { { { 0 } } }; 161 struct nfsv3_diskless nfsv3_diskless = { { { 0 } } }; 162 int nfs_diskless_valid = 0; 163 #endif 164 165 SYSCTL_INT(_vfs_nfs, OID_AUTO, diskless_valid, CTLFLAG_RD, 166 &nfs_diskless_valid, 0, 167 "Has the diskless struct been filled correctly"); 168 169 SYSCTL_STRING(_vfs_nfs, OID_AUTO, diskless_rootpath, CTLFLAG_RD, 170 nfsv3_diskless.root_hostnam, 0, "Path to nfs root"); 171 172 SYSCTL_OPAQUE(_vfs_nfs, OID_AUTO, diskless_rootaddr, CTLFLAG_RD, 173 &nfsv3_diskless.root_saddr, sizeof(nfsv3_diskless.root_saddr), 174 "%Ssockaddr_in", "Diskless root nfs address"); 175 176 177 void newnfsargs_ntoh(struct nfs_args *); 178 static int nfs_mountdiskless(char *, 179 struct sockaddr_in *, struct nfs_args *, 180 struct thread *, struct vnode **, struct mount *); 181 static void nfs_convert_diskless(void); 182 static void nfs_convert_oargs(struct nfs_args *args, 183 struct onfs_args *oargs); 184 185 int 186 newnfs_iosize(struct nfsmount *nmp) 187 { 188 int iosize, maxio; 189 190 /* First, set the upper limit for iosize */ 191 if (nmp->nm_flag & NFSMNT_NFSV4) { 192 maxio = NFS_MAXBSIZE; 193 } else if (nmp->nm_flag & NFSMNT_NFSV3) { 194 if (nmp->nm_sotype == SOCK_DGRAM) 195 maxio = NFS_MAXDGRAMDATA; 196 else 197 maxio = NFS_MAXBSIZE; 198 } else { 199 maxio = NFS_V2MAXDATA; 200 } 201 if (nmp->nm_rsize > maxio || nmp->nm_rsize == 0) 202 nmp->nm_rsize = maxio; 203 if (nmp->nm_rsize > NFS_MAXBSIZE) 204 nmp->nm_rsize = NFS_MAXBSIZE; 205 if (nmp->nm_readdirsize > maxio || nmp->nm_readdirsize == 0) 206 nmp->nm_readdirsize = maxio; 207 if (nmp->nm_readdirsize > nmp->nm_rsize) 208 nmp->nm_readdirsize = nmp->nm_rsize; 209 if (nmp->nm_wsize > maxio || nmp->nm_wsize == 0) 210 nmp->nm_wsize = maxio; 211 if (nmp->nm_wsize > NFS_MAXBSIZE) 212 nmp->nm_wsize = NFS_MAXBSIZE; 213 214 /* 215 * Calculate the size used for io buffers. Use the larger 216 * of the two sizes to minimise nfs requests but make sure 217 * that it is at least one VM page to avoid wasting buffer 218 * space. It must also be at least NFS_DIRBLKSIZ, since 219 * that is the buffer size used for directories. 220 */ 221 iosize = imax(nmp->nm_rsize, nmp->nm_wsize); 222 iosize = imax(iosize, PAGE_SIZE); 223 iosize = imax(iosize, NFS_DIRBLKSIZ); 224 nmp->nm_mountp->mnt_stat.f_iosize = iosize; 225 return (iosize); 226 } 227 228 static void 229 nfs_convert_oargs(struct nfs_args *args, struct onfs_args *oargs) 230 { 231 232 args->version = NFS_ARGSVERSION; 233 args->addr = oargs->addr; 234 args->addrlen = oargs->addrlen; 235 args->sotype = oargs->sotype; 236 args->proto = oargs->proto; 237 args->fh = oargs->fh; 238 args->fhsize = oargs->fhsize; 239 args->flags = oargs->flags; 240 args->wsize = oargs->wsize; 241 args->rsize = oargs->rsize; 242 args->readdirsize = oargs->readdirsize; 243 args->timeo = oargs->timeo; 244 args->retrans = oargs->retrans; 245 args->readahead = oargs->readahead; 246 args->hostname = oargs->hostname; 247 } 248 249 static void 250 nfs_convert_diskless(void) 251 { 252 253 bcopy(&nfs_diskless.myif, &nfsv3_diskless.myif, 254 sizeof(struct ifaliasreq)); 255 bcopy(&nfs_diskless.mygateway, &nfsv3_diskless.mygateway, 256 sizeof(struct sockaddr_in)); 257 nfs_convert_oargs(&nfsv3_diskless.root_args,&nfs_diskless.root_args); 258 if (nfsv3_diskless.root_args.flags & NFSMNT_NFSV3) { 259 nfsv3_diskless.root_fhsize = NFSX_MYFH; 260 bcopy(nfs_diskless.root_fh, nfsv3_diskless.root_fh, NFSX_MYFH); 261 } else { 262 nfsv3_diskless.root_fhsize = NFSX_V2FH; 263 bcopy(nfs_diskless.root_fh, nfsv3_diskless.root_fh, NFSX_V2FH); 264 } 265 bcopy(&nfs_diskless.root_saddr,&nfsv3_diskless.root_saddr, 266 sizeof(struct sockaddr_in)); 267 bcopy(nfs_diskless.root_hostnam, nfsv3_diskless.root_hostnam, MNAMELEN); 268 nfsv3_diskless.root_time = nfs_diskless.root_time; 269 bcopy(nfs_diskless.my_hostnam, nfsv3_diskless.my_hostnam, 270 MAXHOSTNAMELEN); 271 nfs_diskless_valid = 3; 272 } 273 274 /* 275 * nfs statfs call 276 */ 277 static int 278 nfs_statfs(struct mount *mp, struct statfs *sbp) 279 { 280 struct vnode *vp; 281 struct thread *td; 282 struct nfsmount *nmp = VFSTONFS(mp); 283 struct nfsvattr nfsva; 284 struct nfsfsinfo fs; 285 struct nfsstatfs sb; 286 int error = 0, attrflag, gotfsinfo = 0, ret; 287 struct nfsnode *np; 288 289 td = curthread; 290 291 error = vfs_busy(mp, MBF_NOWAIT); 292 if (error) 293 return (error); 294 error = ncl_nget(mp, nmp->nm_fh, nmp->nm_fhsize, &np, LK_EXCLUSIVE); 295 if (error) { 296 vfs_unbusy(mp); 297 return (error); 298 } 299 vp = NFSTOV(np); 300 mtx_lock(&nmp->nm_mtx); 301 if (NFSHASNFSV3(nmp) && !NFSHASGOTFSINFO(nmp)) { 302 mtx_unlock(&nmp->nm_mtx); 303 error = nfsrpc_fsinfo(vp, &fs, td->td_ucred, td, &nfsva, 304 &attrflag, NULL); 305 if (!error) 306 gotfsinfo = 1; 307 } else 308 mtx_unlock(&nmp->nm_mtx); 309 if (!error) 310 error = nfsrpc_statfs(vp, &sb, &fs, td->td_ucred, td, &nfsva, 311 &attrflag, NULL); 312 if (error != 0) 313 NFSCL_DEBUG(2, "statfs=%d\n", error); 314 if (attrflag == 0) { 315 ret = nfsrpc_getattrnovp(nmp, nmp->nm_fh, nmp->nm_fhsize, 1, 316 td->td_ucred, td, &nfsva, NULL, NULL); 317 if (ret) { 318 /* 319 * Just set default values to get things going. 320 */ 321 NFSBZERO((caddr_t)&nfsva, sizeof (struct nfsvattr)); 322 nfsva.na_vattr.va_type = VDIR; 323 nfsva.na_vattr.va_mode = 0777; 324 nfsva.na_vattr.va_nlink = 100; 325 nfsva.na_vattr.va_uid = (uid_t)0; 326 nfsva.na_vattr.va_gid = (gid_t)0; 327 nfsva.na_vattr.va_fileid = 2; 328 nfsva.na_vattr.va_gen = 1; 329 nfsva.na_vattr.va_blocksize = NFS_FABLKSIZE; 330 nfsva.na_vattr.va_size = 512 * 1024; 331 } 332 } 333 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1); 334 if (!error) { 335 mtx_lock(&nmp->nm_mtx); 336 if (gotfsinfo || (nmp->nm_flag & NFSMNT_NFSV4)) 337 nfscl_loadfsinfo(nmp, &fs); 338 nfscl_loadsbinfo(nmp, &sb, sbp); 339 sbp->f_iosize = newnfs_iosize(nmp); 340 mtx_unlock(&nmp->nm_mtx); 341 if (sbp != &mp->mnt_stat) { 342 bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN); 343 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); 344 } 345 strncpy(&sbp->f_fstypename[0], mp->mnt_vfc->vfc_name, MFSNAMELEN); 346 } else if (NFS_ISV4(vp)) { 347 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0); 348 } 349 vput(vp); 350 vfs_unbusy(mp); 351 return (error); 352 } 353 354 /* 355 * nfs version 3 fsinfo rpc call 356 */ 357 int 358 ncl_fsinfo(struct nfsmount *nmp, struct vnode *vp, struct ucred *cred, 359 struct thread *td) 360 { 361 struct nfsfsinfo fs; 362 struct nfsvattr nfsva; 363 int error, attrflag; 364 365 error = nfsrpc_fsinfo(vp, &fs, cred, td, &nfsva, &attrflag, NULL); 366 if (!error) { 367 if (attrflag) 368 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 369 1); 370 mtx_lock(&nmp->nm_mtx); 371 nfscl_loadfsinfo(nmp, &fs); 372 mtx_unlock(&nmp->nm_mtx); 373 } 374 return (error); 375 } 376 377 /* 378 * Mount a remote root fs via. nfs. This depends on the info in the 379 * nfs_diskless structure that has been filled in properly by some primary 380 * bootstrap. 381 * It goes something like this: 382 * - do enough of "ifconfig" by calling ifioctl() so that the system 383 * can talk to the server 384 * - If nfs_diskless.mygateway is filled in, use that address as 385 * a default gateway. 386 * - build the rootfs mount point and call mountnfs() to do the rest. 387 * 388 * It is assumed to be safe to read, modify, and write the nfsv3_diskless 389 * structure, as well as other global NFS client variables here, as 390 * nfs_mountroot() will be called once in the boot before any other NFS 391 * client activity occurs. 392 */ 393 static int 394 nfs_mountroot(struct mount *mp) 395 { 396 struct thread *td = curthread; 397 struct nfsv3_diskless *nd = &nfsv3_diskless; 398 struct socket *so; 399 struct vnode *vp; 400 struct ifreq ir; 401 int error; 402 u_long l; 403 char buf[128]; 404 char *cp; 405 406 #if defined(BOOTP_NFSROOT) && defined(BOOTP) 407 bootpc_init(); /* use bootp to get nfs_diskless filled in */ 408 #elif defined(NFS_ROOT) 409 nfs_setup_diskless(); 410 #endif 411 412 if (nfs_diskless_valid == 0) 413 return (-1); 414 if (nfs_diskless_valid == 1) 415 nfs_convert_diskless(); 416 417 /* 418 * Do enough of ifconfig(8) so that the critical net interface can 419 * talk to the server. 420 */ 421 error = socreate(nd->myif.ifra_addr.sa_family, &so, nd->root_args.sotype, 0, 422 td->td_ucred, td); 423 if (error) 424 panic("nfs_mountroot: socreate(%04x): %d", 425 nd->myif.ifra_addr.sa_family, error); 426 427 #if 0 /* XXX Bad idea */ 428 /* 429 * We might not have been told the right interface, so we pass 430 * over the first ten interfaces of the same kind, until we get 431 * one of them configured. 432 */ 433 434 for (i = strlen(nd->myif.ifra_name) - 1; 435 nd->myif.ifra_name[i] >= '' && 436 nd->myif.ifra_name[i] <= '9'; 437 nd->myif.ifra_name[i] ++) { 438 error = ifioctl(so, SIOCAIFADDR, (caddr_t)&nd->myif, td); 439 if(!error) 440 break; 441 } 442 #endif 443 error = ifioctl(so, SIOCAIFADDR, (caddr_t)&nd->myif, td); 444 if (error) 445 panic("nfs_mountroot: SIOCAIFADDR: %d", error); 446 if ((cp = kern_getenv("boot.netif.mtu")) != NULL) { 447 ir.ifr_mtu = strtol(cp, NULL, 10); 448 bcopy(nd->myif.ifra_name, ir.ifr_name, IFNAMSIZ); 449 freeenv(cp); 450 error = ifioctl(so, SIOCSIFMTU, (caddr_t)&ir, td); 451 if (error) 452 printf("nfs_mountroot: SIOCSIFMTU: %d", error); 453 } 454 soclose(so); 455 456 /* 457 * If the gateway field is filled in, set it as the default route. 458 * Note that pxeboot will set a default route of 0 if the route 459 * is not set by the DHCP server. Check also for a value of 0 460 * to avoid panicking inappropriately in that situation. 461 */ 462 if (nd->mygateway.sin_len != 0 && 463 nd->mygateway.sin_addr.s_addr != 0) { 464 struct sockaddr_in mask, sin; 465 466 bzero((caddr_t)&mask, sizeof(mask)); 467 sin = mask; 468 sin.sin_family = AF_INET; 469 sin.sin_len = sizeof(sin); 470 /* XXX MRT use table 0 for this sort of thing */ 471 CURVNET_SET(TD_TO_VNET(td)); 472 error = rtrequest_fib(RTM_ADD, (struct sockaddr *)&sin, 473 (struct sockaddr *)&nd->mygateway, 474 (struct sockaddr *)&mask, 475 RTF_UP | RTF_GATEWAY, NULL, RT_DEFAULT_FIB); 476 CURVNET_RESTORE(); 477 if (error) 478 panic("nfs_mountroot: RTM_ADD: %d", error); 479 } 480 481 /* 482 * Create the rootfs mount point. 483 */ 484 nd->root_args.fh = nd->root_fh; 485 nd->root_args.fhsize = nd->root_fhsize; 486 l = ntohl(nd->root_saddr.sin_addr.s_addr); 487 snprintf(buf, sizeof(buf), "%ld.%ld.%ld.%ld:%s", 488 (l >> 24) & 0xff, (l >> 16) & 0xff, 489 (l >> 8) & 0xff, (l >> 0) & 0xff, nd->root_hostnam); 490 printf("NFS ROOT: %s\n", buf); 491 nd->root_args.hostname = buf; 492 if ((error = nfs_mountdiskless(buf, 493 &nd->root_saddr, &nd->root_args, td, &vp, mp)) != 0) { 494 return (error); 495 } 496 497 /* 498 * This is not really an nfs issue, but it is much easier to 499 * set hostname here and then let the "/etc/rc.xxx" files 500 * mount the right /var based upon its preset value. 501 */ 502 mtx_lock(&prison0.pr_mtx); 503 strlcpy(prison0.pr_hostname, nd->my_hostnam, 504 sizeof(prison0.pr_hostname)); 505 mtx_unlock(&prison0.pr_mtx); 506 inittodr(ntohl(nd->root_time)); 507 return (0); 508 } 509 510 /* 511 * Internal version of mount system call for diskless setup. 512 */ 513 static int 514 nfs_mountdiskless(char *path, 515 struct sockaddr_in *sin, struct nfs_args *args, struct thread *td, 516 struct vnode **vpp, struct mount *mp) 517 { 518 struct sockaddr *nam; 519 int dirlen, error; 520 char *dirpath; 521 522 /* 523 * Find the directory path in "path", which also has the server's 524 * name/ip address in it. 525 */ 526 dirpath = strchr(path, ':'); 527 if (dirpath != NULL) 528 dirlen = strlen(++dirpath); 529 else 530 dirlen = 0; 531 nam = sodupsockaddr((struct sockaddr *)sin, M_WAITOK); 532 if ((error = mountnfs(args, mp, nam, path, NULL, 0, dirpath, dirlen, 533 NULL, 0, vpp, td->td_ucred, td, NFS_DEFAULT_NAMETIMEO, 534 NFS_DEFAULT_NEGNAMETIMEO, 0)) != 0) { 535 printf("nfs_mountroot: mount %s on /: %d\n", path, error); 536 return (error); 537 } 538 return (0); 539 } 540 541 static void 542 nfs_sec_name(char *sec, int *flagsp) 543 { 544 if (!strcmp(sec, "krb5")) 545 *flagsp |= NFSMNT_KERB; 546 else if (!strcmp(sec, "krb5i")) 547 *flagsp |= (NFSMNT_KERB | NFSMNT_INTEGRITY); 548 else if (!strcmp(sec, "krb5p")) 549 *flagsp |= (NFSMNT_KERB | NFSMNT_PRIVACY); 550 } 551 552 static void 553 nfs_decode_args(struct mount *mp, struct nfsmount *nmp, struct nfs_args *argp, 554 const char *hostname, struct ucred *cred, struct thread *td) 555 { 556 int adjsock; 557 char *p; 558 559 /* 560 * Set read-only flag if requested; otherwise, clear it if this is 561 * an update. If this is not an update, then either the read-only 562 * flag is already clear, or this is a root mount and it was set 563 * intentionally at some previous point. 564 */ 565 if (vfs_getopt(mp->mnt_optnew, "ro", NULL, NULL) == 0) { 566 MNT_ILOCK(mp); 567 mp->mnt_flag |= MNT_RDONLY; 568 MNT_IUNLOCK(mp); 569 } else if (mp->mnt_flag & MNT_UPDATE) { 570 MNT_ILOCK(mp); 571 mp->mnt_flag &= ~MNT_RDONLY; 572 MNT_IUNLOCK(mp); 573 } 574 575 /* 576 * Silently clear NFSMNT_NOCONN if it's a TCP mount, it makes 577 * no sense in that context. Also, set up appropriate retransmit 578 * and soft timeout behavior. 579 */ 580 if (argp->sotype == SOCK_STREAM) { 581 nmp->nm_flag &= ~NFSMNT_NOCONN; 582 nmp->nm_timeo = NFS_MAXTIMEO; 583 if ((argp->flags & NFSMNT_NFSV4) != 0) 584 nmp->nm_retry = INT_MAX; 585 else 586 nmp->nm_retry = NFS_RETRANS_TCP; 587 } 588 589 /* Also clear RDIRPLUS if NFSv2, it crashes some servers */ 590 if ((argp->flags & (NFSMNT_NFSV3 | NFSMNT_NFSV4)) == 0) { 591 argp->flags &= ~NFSMNT_RDIRPLUS; 592 nmp->nm_flag &= ~NFSMNT_RDIRPLUS; 593 } 594 595 /* Clear ONEOPENOWN for NFSv2, 3 and 4.0. */ 596 if (nmp->nm_minorvers == 0) { 597 argp->flags &= ~NFSMNT_ONEOPENOWN; 598 nmp->nm_flag &= ~NFSMNT_ONEOPENOWN; 599 } 600 601 /* Re-bind if rsrvd port requested and wasn't on one */ 602 adjsock = !(nmp->nm_flag & NFSMNT_RESVPORT) 603 && (argp->flags & NFSMNT_RESVPORT); 604 /* Also re-bind if we're switching to/from a connected UDP socket */ 605 adjsock |= ((nmp->nm_flag & NFSMNT_NOCONN) != 606 (argp->flags & NFSMNT_NOCONN)); 607 608 /* Update flags atomically. Don't change the lock bits. */ 609 nmp->nm_flag = argp->flags | nmp->nm_flag; 610 611 if ((argp->flags & NFSMNT_TIMEO) && argp->timeo > 0) { 612 nmp->nm_timeo = (argp->timeo * NFS_HZ + 5) / 10; 613 if (nmp->nm_timeo < NFS_MINTIMEO) 614 nmp->nm_timeo = NFS_MINTIMEO; 615 else if (nmp->nm_timeo > NFS_MAXTIMEO) 616 nmp->nm_timeo = NFS_MAXTIMEO; 617 } 618 619 if ((argp->flags & NFSMNT_RETRANS) && argp->retrans > 1) { 620 nmp->nm_retry = argp->retrans; 621 if (nmp->nm_retry > NFS_MAXREXMIT) 622 nmp->nm_retry = NFS_MAXREXMIT; 623 } 624 625 if ((argp->flags & NFSMNT_WSIZE) && argp->wsize > 0) { 626 nmp->nm_wsize = argp->wsize; 627 /* 628 * Clip at the power of 2 below the size. There is an 629 * issue (not isolated) that causes intermittent page 630 * faults if this is not done. 631 */ 632 if (nmp->nm_wsize > NFS_FABLKSIZE) 633 nmp->nm_wsize = 1 << (fls(nmp->nm_wsize) - 1); 634 else 635 nmp->nm_wsize = NFS_FABLKSIZE; 636 } 637 638 if ((argp->flags & NFSMNT_RSIZE) && argp->rsize > 0) { 639 nmp->nm_rsize = argp->rsize; 640 /* 641 * Clip at the power of 2 below the size. There is an 642 * issue (not isolated) that causes intermittent page 643 * faults if this is not done. 644 */ 645 if (nmp->nm_rsize > NFS_FABLKSIZE) 646 nmp->nm_rsize = 1 << (fls(nmp->nm_rsize) - 1); 647 else 648 nmp->nm_rsize = NFS_FABLKSIZE; 649 } 650 651 if ((argp->flags & NFSMNT_READDIRSIZE) && argp->readdirsize > 0) { 652 nmp->nm_readdirsize = argp->readdirsize; 653 } 654 655 if ((argp->flags & NFSMNT_ACREGMIN) && argp->acregmin >= 0) 656 nmp->nm_acregmin = argp->acregmin; 657 else 658 nmp->nm_acregmin = NFS_MINATTRTIMO; 659 if ((argp->flags & NFSMNT_ACREGMAX) && argp->acregmax >= 0) 660 nmp->nm_acregmax = argp->acregmax; 661 else 662 nmp->nm_acregmax = NFS_MAXATTRTIMO; 663 if ((argp->flags & NFSMNT_ACDIRMIN) && argp->acdirmin >= 0) 664 nmp->nm_acdirmin = argp->acdirmin; 665 else 666 nmp->nm_acdirmin = NFS_MINDIRATTRTIMO; 667 if ((argp->flags & NFSMNT_ACDIRMAX) && argp->acdirmax >= 0) 668 nmp->nm_acdirmax = argp->acdirmax; 669 else 670 nmp->nm_acdirmax = NFS_MAXDIRATTRTIMO; 671 if (nmp->nm_acdirmin > nmp->nm_acdirmax) 672 nmp->nm_acdirmin = nmp->nm_acdirmax; 673 if (nmp->nm_acregmin > nmp->nm_acregmax) 674 nmp->nm_acregmin = nmp->nm_acregmax; 675 676 if ((argp->flags & NFSMNT_READAHEAD) && argp->readahead >= 0) { 677 if (argp->readahead <= NFS_MAXRAHEAD) 678 nmp->nm_readahead = argp->readahead; 679 else 680 nmp->nm_readahead = NFS_MAXRAHEAD; 681 } 682 if ((argp->flags & NFSMNT_WCOMMITSIZE) && argp->wcommitsize >= 0) { 683 if (argp->wcommitsize < nmp->nm_wsize) 684 nmp->nm_wcommitsize = nmp->nm_wsize; 685 else 686 nmp->nm_wcommitsize = argp->wcommitsize; 687 } 688 689 adjsock |= ((nmp->nm_sotype != argp->sotype) || 690 (nmp->nm_soproto != argp->proto)); 691 692 if (nmp->nm_client != NULL && adjsock) { 693 int haslock = 0, error = 0; 694 695 if (nmp->nm_sotype == SOCK_STREAM) { 696 error = newnfs_sndlock(&nmp->nm_sockreq.nr_lock); 697 if (!error) 698 haslock = 1; 699 } 700 if (!error) { 701 newnfs_disconnect(&nmp->nm_sockreq); 702 if (haslock) 703 newnfs_sndunlock(&nmp->nm_sockreq.nr_lock); 704 nmp->nm_sotype = argp->sotype; 705 nmp->nm_soproto = argp->proto; 706 if (nmp->nm_sotype == SOCK_DGRAM) 707 while (newnfs_connect(nmp, &nmp->nm_sockreq, 708 cred, td, 0)) { 709 printf("newnfs_args: retrying connect\n"); 710 (void) nfs_catnap(PSOCK, 0, "nfscon"); 711 } 712 } 713 } else { 714 nmp->nm_sotype = argp->sotype; 715 nmp->nm_soproto = argp->proto; 716 } 717 718 if (hostname != NULL) { 719 strlcpy(nmp->nm_hostname, hostname, 720 sizeof(nmp->nm_hostname)); 721 p = strchr(nmp->nm_hostname, ':'); 722 if (p != NULL) 723 *p = '\0'; 724 } 725 } 726 727 static const char *nfs_opts[] = { "from", "nfs_args", 728 "noac", "noatime", "noexec", "suiddir", "nosuid", "nosymfollow", "union", 729 "noclusterr", "noclusterw", "multilabel", "acls", "force", "update", 730 "async", "noconn", "nolockd", "conn", "lockd", "intr", "rdirplus", 731 "readdirsize", "soft", "hard", "mntudp", "tcp", "udp", "wsize", "rsize", 732 "retrans", "actimeo", "acregmin", "acregmax", "acdirmin", "acdirmax", 733 "resvport", "readahead", "hostname", "timeo", "timeout", "addr", "fh", 734 "nfsv3", "sec", "principal", "nfsv4", "gssname", "allgssname", "dirpath", 735 "minorversion", "nametimeo", "negnametimeo", "nocto", "noncontigwr", 736 "pnfs", "wcommitsize", "oneopenown", 737 NULL }; 738 739 /* 740 * Parse the "from" mountarg, passed by the generic mount(8) program 741 * or the mountroot code. This is used when rerooting into NFS. 742 * 743 * Note that the "hostname" is actually a "hostname:/share/path" string. 744 */ 745 static int 746 nfs_mount_parse_from(struct vfsoptlist *opts, char **hostnamep, 747 struct sockaddr_in **sinp, char *dirpath, size_t dirpathsize, int *dirlenp) 748 { 749 char *nam, *delimp, *hostp, *spec; 750 int error, have_bracket = 0, offset, rv, speclen; 751 struct sockaddr_in *sin; 752 size_t len; 753 754 error = vfs_getopt(opts, "from", (void **)&spec, &speclen); 755 if (error != 0) 756 return (error); 757 nam = malloc(MNAMELEN + 1, M_TEMP, M_WAITOK); 758 759 /* 760 * This part comes from sbin/mount_nfs/mount_nfs.c:getnfsargs(). 761 */ 762 if (*spec == '[' && (delimp = strchr(spec + 1, ']')) != NULL && 763 *(delimp + 1) == ':') { 764 hostp = spec + 1; 765 spec = delimp + 2; 766 have_bracket = 1; 767 } else if ((delimp = strrchr(spec, ':')) != NULL) { 768 hostp = spec; 769 spec = delimp + 1; 770 } else if ((delimp = strrchr(spec, '@')) != NULL) { 771 printf("%s: path@server syntax is deprecated, " 772 "use server:path\n", __func__); 773 hostp = delimp + 1; 774 } else { 775 printf("%s: no <host>:<dirpath> nfs-name\n", __func__); 776 free(nam, M_TEMP); 777 return (EINVAL); 778 } 779 *delimp = '\0'; 780 781 /* 782 * If there has been a trailing slash at mounttime it seems 783 * that some mountd implementations fail to remove the mount 784 * entries from their mountlist while unmounting. 785 */ 786 for (speclen = strlen(spec); 787 speclen > 1 && spec[speclen - 1] == '/'; 788 speclen--) 789 spec[speclen - 1] = '\0'; 790 if (strlen(hostp) + strlen(spec) + 1 > MNAMELEN) { 791 printf("%s: %s:%s: name too long", __func__, hostp, spec); 792 free(nam, M_TEMP); 793 return (EINVAL); 794 } 795 /* Make both '@' and ':' notations equal */ 796 if (*hostp != '\0') { 797 len = strlen(hostp); 798 offset = 0; 799 if (have_bracket) 800 nam[offset++] = '['; 801 memmove(nam + offset, hostp, len); 802 if (have_bracket) 803 nam[len + offset++] = ']'; 804 nam[len + offset++] = ':'; 805 memmove(nam + len + offset, spec, speclen); 806 nam[len + speclen + offset] = '\0'; 807 } else 808 nam[0] = '\0'; 809 810 /* 811 * XXX: IPv6 812 */ 813 sin = malloc(sizeof(*sin), M_SONAME, M_WAITOK); 814 rv = inet_pton(AF_INET, hostp, &sin->sin_addr); 815 if (rv != 1) { 816 printf("%s: cannot parse '%s', inet_pton() returned %d\n", 817 __func__, hostp, rv); 818 free(nam, M_TEMP); 819 free(sin, M_SONAME); 820 return (EINVAL); 821 } 822 823 sin->sin_len = sizeof(*sin); 824 sin->sin_family = AF_INET; 825 /* 826 * XXX: hardcoded port number. 827 */ 828 sin->sin_port = htons(2049); 829 830 *hostnamep = strdup(nam, M_NEWNFSMNT); 831 *sinp = sin; 832 strlcpy(dirpath, spec, dirpathsize); 833 *dirlenp = strlen(dirpath); 834 835 free(nam, M_TEMP); 836 return (0); 837 } 838 839 /* 840 * VFS Operations. 841 * 842 * mount system call 843 * It seems a bit dumb to copyinstr() the host and path here and then 844 * bcopy() them in mountnfs(), but I wanted to detect errors before 845 * doing the getsockaddr() call because getsockaddr() allocates an mbuf and 846 * an error after that means that I have to release the mbuf. 847 */ 848 /* ARGSUSED */ 849 static int 850 nfs_mount(struct mount *mp) 851 { 852 struct nfs_args args = { 853 .version = NFS_ARGSVERSION, 854 .addr = NULL, 855 .addrlen = sizeof (struct sockaddr_in), 856 .sotype = SOCK_STREAM, 857 .proto = 0, 858 .fh = NULL, 859 .fhsize = 0, 860 .flags = NFSMNT_RESVPORT, 861 .wsize = NFS_WSIZE, 862 .rsize = NFS_RSIZE, 863 .readdirsize = NFS_READDIRSIZE, 864 .timeo = 10, 865 .retrans = NFS_RETRANS, 866 .readahead = NFS_DEFRAHEAD, 867 .wcommitsize = 0, /* was: NQ_DEFLEASE */ 868 .hostname = NULL, 869 .acregmin = NFS_MINATTRTIMO, 870 .acregmax = NFS_MAXATTRTIMO, 871 .acdirmin = NFS_MINDIRATTRTIMO, 872 .acdirmax = NFS_MAXDIRATTRTIMO, 873 }; 874 int error = 0, ret, len; 875 struct sockaddr *nam = NULL; 876 struct vnode *vp; 877 struct thread *td; 878 char *hst; 879 u_char nfh[NFSX_FHMAX], krbname[100], dirpath[100], srvkrbname[100]; 880 char *cp, *opt, *name, *secname; 881 int nametimeo = NFS_DEFAULT_NAMETIMEO; 882 int negnametimeo = NFS_DEFAULT_NEGNAMETIMEO; 883 int minvers = 0; 884 int dirlen, has_nfs_args_opt, has_nfs_from_opt, 885 krbnamelen, srvkrbnamelen; 886 size_t hstlen; 887 888 has_nfs_args_opt = 0; 889 has_nfs_from_opt = 0; 890 hst = malloc(MNAMELEN, M_TEMP, M_WAITOK); 891 if (vfs_filteropt(mp->mnt_optnew, nfs_opts)) { 892 error = EINVAL; 893 goto out; 894 } 895 896 td = curthread; 897 if ((mp->mnt_flag & (MNT_ROOTFS | MNT_UPDATE)) == MNT_ROOTFS && 898 nfs_diskless_valid != 0) { 899 error = nfs_mountroot(mp); 900 goto out; 901 } 902 903 nfscl_init(); 904 905 /* 906 * The old mount_nfs program passed the struct nfs_args 907 * from userspace to kernel. The new mount_nfs program 908 * passes string options via nmount() from userspace to kernel 909 * and we populate the struct nfs_args in the kernel. 910 */ 911 if (vfs_getopt(mp->mnt_optnew, "nfs_args", NULL, NULL) == 0) { 912 error = vfs_copyopt(mp->mnt_optnew, "nfs_args", &args, 913 sizeof(args)); 914 if (error != 0) 915 goto out; 916 917 if (args.version != NFS_ARGSVERSION) { 918 error = EPROGMISMATCH; 919 goto out; 920 } 921 has_nfs_args_opt = 1; 922 } 923 924 /* Handle the new style options. */ 925 if (vfs_getopt(mp->mnt_optnew, "noac", NULL, NULL) == 0) { 926 args.acdirmin = args.acdirmax = 927 args.acregmin = args.acregmax = 0; 928 args.flags |= NFSMNT_ACDIRMIN | NFSMNT_ACDIRMAX | 929 NFSMNT_ACREGMIN | NFSMNT_ACREGMAX; 930 } 931 if (vfs_getopt(mp->mnt_optnew, "noconn", NULL, NULL) == 0) 932 args.flags |= NFSMNT_NOCONN; 933 if (vfs_getopt(mp->mnt_optnew, "conn", NULL, NULL) == 0) 934 args.flags &= ~NFSMNT_NOCONN; 935 if (vfs_getopt(mp->mnt_optnew, "nolockd", NULL, NULL) == 0) 936 args.flags |= NFSMNT_NOLOCKD; 937 if (vfs_getopt(mp->mnt_optnew, "lockd", NULL, NULL) == 0) 938 args.flags &= ~NFSMNT_NOLOCKD; 939 if (vfs_getopt(mp->mnt_optnew, "intr", NULL, NULL) == 0) 940 args.flags |= NFSMNT_INT; 941 if (vfs_getopt(mp->mnt_optnew, "rdirplus", NULL, NULL) == 0) 942 args.flags |= NFSMNT_RDIRPLUS; 943 if (vfs_getopt(mp->mnt_optnew, "resvport", NULL, NULL) == 0) 944 args.flags |= NFSMNT_RESVPORT; 945 if (vfs_getopt(mp->mnt_optnew, "noresvport", NULL, NULL) == 0) 946 args.flags &= ~NFSMNT_RESVPORT; 947 if (vfs_getopt(mp->mnt_optnew, "soft", NULL, NULL) == 0) 948 args.flags |= NFSMNT_SOFT; 949 if (vfs_getopt(mp->mnt_optnew, "hard", NULL, NULL) == 0) 950 args.flags &= ~NFSMNT_SOFT; 951 if (vfs_getopt(mp->mnt_optnew, "mntudp", NULL, NULL) == 0) 952 args.sotype = SOCK_DGRAM; 953 if (vfs_getopt(mp->mnt_optnew, "udp", NULL, NULL) == 0) 954 args.sotype = SOCK_DGRAM; 955 if (vfs_getopt(mp->mnt_optnew, "tcp", NULL, NULL) == 0) 956 args.sotype = SOCK_STREAM; 957 if (vfs_getopt(mp->mnt_optnew, "nfsv3", NULL, NULL) == 0) 958 args.flags |= NFSMNT_NFSV3; 959 if (vfs_getopt(mp->mnt_optnew, "nfsv4", NULL, NULL) == 0) { 960 args.flags |= NFSMNT_NFSV4; 961 args.sotype = SOCK_STREAM; 962 } 963 if (vfs_getopt(mp->mnt_optnew, "allgssname", NULL, NULL) == 0) 964 args.flags |= NFSMNT_ALLGSSNAME; 965 if (vfs_getopt(mp->mnt_optnew, "nocto", NULL, NULL) == 0) 966 args.flags |= NFSMNT_NOCTO; 967 if (vfs_getopt(mp->mnt_optnew, "noncontigwr", NULL, NULL) == 0) 968 args.flags |= NFSMNT_NONCONTIGWR; 969 if (vfs_getopt(mp->mnt_optnew, "pnfs", NULL, NULL) == 0) 970 args.flags |= NFSMNT_PNFS; 971 if (vfs_getopt(mp->mnt_optnew, "oneopenown", NULL, NULL) == 0) 972 args.flags |= NFSMNT_ONEOPENOWN; 973 if (vfs_getopt(mp->mnt_optnew, "readdirsize", (void **)&opt, NULL) == 0) { 974 if (opt == NULL) { 975 vfs_mount_error(mp, "illegal readdirsize"); 976 error = EINVAL; 977 goto out; 978 } 979 ret = sscanf(opt, "%d", &args.readdirsize); 980 if (ret != 1 || args.readdirsize <= 0) { 981 vfs_mount_error(mp, "illegal readdirsize: %s", 982 opt); 983 error = EINVAL; 984 goto out; 985 } 986 args.flags |= NFSMNT_READDIRSIZE; 987 } 988 if (vfs_getopt(mp->mnt_optnew, "readahead", (void **)&opt, NULL) == 0) { 989 if (opt == NULL) { 990 vfs_mount_error(mp, "illegal readahead"); 991 error = EINVAL; 992 goto out; 993 } 994 ret = sscanf(opt, "%d", &args.readahead); 995 if (ret != 1 || args.readahead <= 0) { 996 vfs_mount_error(mp, "illegal readahead: %s", 997 opt); 998 error = EINVAL; 999 goto out; 1000 } 1001 args.flags |= NFSMNT_READAHEAD; 1002 } 1003 if (vfs_getopt(mp->mnt_optnew, "wsize", (void **)&opt, NULL) == 0) { 1004 if (opt == NULL) { 1005 vfs_mount_error(mp, "illegal wsize"); 1006 error = EINVAL; 1007 goto out; 1008 } 1009 ret = sscanf(opt, "%d", &args.wsize); 1010 if (ret != 1 || args.wsize <= 0) { 1011 vfs_mount_error(mp, "illegal wsize: %s", 1012 opt); 1013 error = EINVAL; 1014 goto out; 1015 } 1016 args.flags |= NFSMNT_WSIZE; 1017 } 1018 if (vfs_getopt(mp->mnt_optnew, "rsize", (void **)&opt, NULL) == 0) { 1019 if (opt == NULL) { 1020 vfs_mount_error(mp, "illegal rsize"); 1021 error = EINVAL; 1022 goto out; 1023 } 1024 ret = sscanf(opt, "%d", &args.rsize); 1025 if (ret != 1 || args.rsize <= 0) { 1026 vfs_mount_error(mp, "illegal wsize: %s", 1027 opt); 1028 error = EINVAL; 1029 goto out; 1030 } 1031 args.flags |= NFSMNT_RSIZE; 1032 } 1033 if (vfs_getopt(mp->mnt_optnew, "retrans", (void **)&opt, NULL) == 0) { 1034 if (opt == NULL) { 1035 vfs_mount_error(mp, "illegal retrans"); 1036 error = EINVAL; 1037 goto out; 1038 } 1039 ret = sscanf(opt, "%d", &args.retrans); 1040 if (ret != 1 || args.retrans <= 0) { 1041 vfs_mount_error(mp, "illegal retrans: %s", 1042 opt); 1043 error = EINVAL; 1044 goto out; 1045 } 1046 args.flags |= NFSMNT_RETRANS; 1047 } 1048 if (vfs_getopt(mp->mnt_optnew, "actimeo", (void **)&opt, NULL) == 0) { 1049 ret = sscanf(opt, "%d", &args.acregmin); 1050 if (ret != 1 || args.acregmin < 0) { 1051 vfs_mount_error(mp, "illegal actimeo: %s", 1052 opt); 1053 error = EINVAL; 1054 goto out; 1055 } 1056 args.acdirmin = args.acdirmax = args.acregmax = args.acregmin; 1057 args.flags |= NFSMNT_ACDIRMIN | NFSMNT_ACDIRMAX | 1058 NFSMNT_ACREGMIN | NFSMNT_ACREGMAX; 1059 } 1060 if (vfs_getopt(mp->mnt_optnew, "acregmin", (void **)&opt, NULL) == 0) { 1061 ret = sscanf(opt, "%d", &args.acregmin); 1062 if (ret != 1 || args.acregmin < 0) { 1063 vfs_mount_error(mp, "illegal acregmin: %s", 1064 opt); 1065 error = EINVAL; 1066 goto out; 1067 } 1068 args.flags |= NFSMNT_ACREGMIN; 1069 } 1070 if (vfs_getopt(mp->mnt_optnew, "acregmax", (void **)&opt, NULL) == 0) { 1071 ret = sscanf(opt, "%d", &args.acregmax); 1072 if (ret != 1 || args.acregmax < 0) { 1073 vfs_mount_error(mp, "illegal acregmax: %s", 1074 opt); 1075 error = EINVAL; 1076 goto out; 1077 } 1078 args.flags |= NFSMNT_ACREGMAX; 1079 } 1080 if (vfs_getopt(mp->mnt_optnew, "acdirmin", (void **)&opt, NULL) == 0) { 1081 ret = sscanf(opt, "%d", &args.acdirmin); 1082 if (ret != 1 || args.acdirmin < 0) { 1083 vfs_mount_error(mp, "illegal acdirmin: %s", 1084 opt); 1085 error = EINVAL; 1086 goto out; 1087 } 1088 args.flags |= NFSMNT_ACDIRMIN; 1089 } 1090 if (vfs_getopt(mp->mnt_optnew, "acdirmax", (void **)&opt, NULL) == 0) { 1091 ret = sscanf(opt, "%d", &args.acdirmax); 1092 if (ret != 1 || args.acdirmax < 0) { 1093 vfs_mount_error(mp, "illegal acdirmax: %s", 1094 opt); 1095 error = EINVAL; 1096 goto out; 1097 } 1098 args.flags |= NFSMNT_ACDIRMAX; 1099 } 1100 if (vfs_getopt(mp->mnt_optnew, "wcommitsize", (void **)&opt, NULL) == 0) { 1101 ret = sscanf(opt, "%d", &args.wcommitsize); 1102 if (ret != 1 || args.wcommitsize < 0) { 1103 vfs_mount_error(mp, "illegal wcommitsize: %s", opt); 1104 error = EINVAL; 1105 goto out; 1106 } 1107 args.flags |= NFSMNT_WCOMMITSIZE; 1108 } 1109 if (vfs_getopt(mp->mnt_optnew, "timeo", (void **)&opt, NULL) == 0) { 1110 ret = sscanf(opt, "%d", &args.timeo); 1111 if (ret != 1 || args.timeo <= 0) { 1112 vfs_mount_error(mp, "illegal timeo: %s", 1113 opt); 1114 error = EINVAL; 1115 goto out; 1116 } 1117 args.flags |= NFSMNT_TIMEO; 1118 } 1119 if (vfs_getopt(mp->mnt_optnew, "timeout", (void **)&opt, NULL) == 0) { 1120 ret = sscanf(opt, "%d", &args.timeo); 1121 if (ret != 1 || args.timeo <= 0) { 1122 vfs_mount_error(mp, "illegal timeout: %s", 1123 opt); 1124 error = EINVAL; 1125 goto out; 1126 } 1127 args.flags |= NFSMNT_TIMEO; 1128 } 1129 if (vfs_getopt(mp->mnt_optnew, "nametimeo", (void **)&opt, NULL) == 0) { 1130 ret = sscanf(opt, "%d", &nametimeo); 1131 if (ret != 1 || nametimeo < 0) { 1132 vfs_mount_error(mp, "illegal nametimeo: %s", opt); 1133 error = EINVAL; 1134 goto out; 1135 } 1136 } 1137 if (vfs_getopt(mp->mnt_optnew, "negnametimeo", (void **)&opt, NULL) 1138 == 0) { 1139 ret = sscanf(opt, "%d", &negnametimeo); 1140 if (ret != 1 || negnametimeo < 0) { 1141 vfs_mount_error(mp, "illegal negnametimeo: %s", 1142 opt); 1143 error = EINVAL; 1144 goto out; 1145 } 1146 } 1147 if (vfs_getopt(mp->mnt_optnew, "minorversion", (void **)&opt, NULL) == 1148 0) { 1149 ret = sscanf(opt, "%d", &minvers); 1150 if (ret != 1 || minvers < 0 || minvers > 1 || 1151 (args.flags & NFSMNT_NFSV4) == 0) { 1152 vfs_mount_error(mp, "illegal minorversion: %s", opt); 1153 error = EINVAL; 1154 goto out; 1155 } 1156 } 1157 if (vfs_getopt(mp->mnt_optnew, "sec", 1158 (void **) &secname, NULL) == 0) 1159 nfs_sec_name(secname, &args.flags); 1160 1161 if (mp->mnt_flag & MNT_UPDATE) { 1162 struct nfsmount *nmp = VFSTONFS(mp); 1163 1164 if (nmp == NULL) { 1165 error = EIO; 1166 goto out; 1167 } 1168 1169 /* 1170 * If a change from TCP->UDP is done and there are thread(s) 1171 * that have I/O RPC(s) in progress with a transfer size 1172 * greater than NFS_MAXDGRAMDATA, those thread(s) will be 1173 * hung, retrying the RPC(s) forever. Usually these threads 1174 * will be seen doing an uninterruptible sleep on wait channel 1175 * "nfsreq". 1176 */ 1177 if (args.sotype == SOCK_DGRAM && nmp->nm_sotype == SOCK_STREAM) 1178 tprintf(td->td_proc, LOG_WARNING, 1179 "Warning: mount -u that changes TCP->UDP can result in hung threads\n"); 1180 1181 /* 1182 * When doing an update, we can't change version, 1183 * security, switch lockd strategies, change cookie 1184 * translation or switch oneopenown. 1185 */ 1186 args.flags = (args.flags & 1187 ~(NFSMNT_NFSV3 | 1188 NFSMNT_NFSV4 | 1189 NFSMNT_KERB | 1190 NFSMNT_INTEGRITY | 1191 NFSMNT_PRIVACY | 1192 NFSMNT_ONEOPENOWN | 1193 NFSMNT_NOLOCKD /*|NFSMNT_XLATECOOKIE*/)) | 1194 (nmp->nm_flag & 1195 (NFSMNT_NFSV3 | 1196 NFSMNT_NFSV4 | 1197 NFSMNT_KERB | 1198 NFSMNT_INTEGRITY | 1199 NFSMNT_PRIVACY | 1200 NFSMNT_ONEOPENOWN | 1201 NFSMNT_NOLOCKD /*|NFSMNT_XLATECOOKIE*/)); 1202 nfs_decode_args(mp, nmp, &args, NULL, td->td_ucred, td); 1203 goto out; 1204 } 1205 1206 /* 1207 * Make the nfs_ip_paranoia sysctl serve as the default connection 1208 * or no-connection mode for those protocols that support 1209 * no-connection mode (the flag will be cleared later for protocols 1210 * that do not support no-connection mode). This will allow a client 1211 * to receive replies from a different IP then the request was 1212 * sent to. Note: default value for nfs_ip_paranoia is 1 (paranoid), 1213 * not 0. 1214 */ 1215 if (nfs_ip_paranoia == 0) 1216 args.flags |= NFSMNT_NOCONN; 1217 1218 if (has_nfs_args_opt != 0) { 1219 /* 1220 * In the 'nfs_args' case, the pointers in the args 1221 * structure are in userland - we copy them in here. 1222 */ 1223 if (args.fhsize < 0 || args.fhsize > NFSX_V3FHMAX) { 1224 vfs_mount_error(mp, "Bad file handle"); 1225 error = EINVAL; 1226 goto out; 1227 } 1228 error = copyin((caddr_t)args.fh, (caddr_t)nfh, 1229 args.fhsize); 1230 if (error != 0) 1231 goto out; 1232 error = copyinstr(args.hostname, hst, MNAMELEN - 1, &hstlen); 1233 if (error != 0) 1234 goto out; 1235 bzero(&hst[hstlen], MNAMELEN - hstlen); 1236 args.hostname = hst; 1237 /* getsockaddr() call must be after above copyin() calls */ 1238 error = getsockaddr(&nam, (caddr_t)args.addr, 1239 args.addrlen); 1240 if (error != 0) 1241 goto out; 1242 } else if (nfs_mount_parse_from(mp->mnt_optnew, 1243 &args.hostname, (struct sockaddr_in **)&nam, dirpath, 1244 sizeof(dirpath), &dirlen) == 0) { 1245 has_nfs_from_opt = 1; 1246 bcopy(args.hostname, hst, MNAMELEN); 1247 hst[MNAMELEN - 1] = '\0'; 1248 1249 /* 1250 * This only works with NFSv4 for now. 1251 */ 1252 args.fhsize = 0; 1253 args.flags |= NFSMNT_NFSV4; 1254 args.sotype = SOCK_STREAM; 1255 } else { 1256 if (vfs_getopt(mp->mnt_optnew, "fh", (void **)&args.fh, 1257 &args.fhsize) == 0) { 1258 if (args.fhsize < 0 || args.fhsize > NFSX_FHMAX) { 1259 vfs_mount_error(mp, "Bad file handle"); 1260 error = EINVAL; 1261 goto out; 1262 } 1263 bcopy(args.fh, nfh, args.fhsize); 1264 } else { 1265 args.fhsize = 0; 1266 } 1267 (void) vfs_getopt(mp->mnt_optnew, "hostname", 1268 (void **)&args.hostname, &len); 1269 if (args.hostname == NULL) { 1270 vfs_mount_error(mp, "Invalid hostname"); 1271 error = EINVAL; 1272 goto out; 1273 } 1274 if (len >= MNAMELEN) { 1275 vfs_mount_error(mp, "Hostname too long"); 1276 error = EINVAL; 1277 goto out; 1278 } 1279 bcopy(args.hostname, hst, len); 1280 hst[len] = '\0'; 1281 } 1282 1283 if (vfs_getopt(mp->mnt_optnew, "principal", (void **)&name, NULL) == 0) 1284 strlcpy(srvkrbname, name, sizeof (srvkrbname)); 1285 else { 1286 snprintf(srvkrbname, sizeof (srvkrbname), "nfs@%s", hst); 1287 cp = strchr(srvkrbname, ':'); 1288 if (cp != NULL) 1289 *cp = '\0'; 1290 } 1291 srvkrbnamelen = strlen(srvkrbname); 1292 1293 if (vfs_getopt(mp->mnt_optnew, "gssname", (void **)&name, NULL) == 0) 1294 strlcpy(krbname, name, sizeof (krbname)); 1295 else 1296 krbname[0] = '\0'; 1297 krbnamelen = strlen(krbname); 1298 1299 if (has_nfs_from_opt == 0) { 1300 if (vfs_getopt(mp->mnt_optnew, 1301 "dirpath", (void **)&name, NULL) == 0) 1302 strlcpy(dirpath, name, sizeof (dirpath)); 1303 else 1304 dirpath[0] = '\0'; 1305 dirlen = strlen(dirpath); 1306 } 1307 1308 if (has_nfs_args_opt == 0 && has_nfs_from_opt == 0) { 1309 if (vfs_getopt(mp->mnt_optnew, "addr", 1310 (void **)&args.addr, &args.addrlen) == 0) { 1311 if (args.addrlen > SOCK_MAXADDRLEN) { 1312 error = ENAMETOOLONG; 1313 goto out; 1314 } 1315 nam = malloc(args.addrlen, M_SONAME, M_WAITOK); 1316 bcopy(args.addr, nam, args.addrlen); 1317 nam->sa_len = args.addrlen; 1318 } else { 1319 vfs_mount_error(mp, "No server address"); 1320 error = EINVAL; 1321 goto out; 1322 } 1323 } 1324 1325 args.fh = nfh; 1326 error = mountnfs(&args, mp, nam, hst, krbname, krbnamelen, dirpath, 1327 dirlen, srvkrbname, srvkrbnamelen, &vp, td->td_ucred, td, 1328 nametimeo, negnametimeo, minvers); 1329 out: 1330 if (!error) { 1331 MNT_ILOCK(mp); 1332 mp->mnt_kern_flag |= MNTK_LOOKUP_SHARED | MNTK_NO_IOPF | 1333 MNTK_USES_BCACHE; 1334 if ((VFSTONFS(mp)->nm_flag & NFSMNT_NFSV4) != 0) 1335 mp->mnt_kern_flag |= MNTK_NULL_NOCACHE; 1336 MNT_IUNLOCK(mp); 1337 } 1338 free(hst, M_TEMP); 1339 return (error); 1340 } 1341 1342 1343 /* 1344 * VFS Operations. 1345 * 1346 * mount system call 1347 * It seems a bit dumb to copyinstr() the host and path here and then 1348 * bcopy() them in mountnfs(), but I wanted to detect errors before 1349 * doing the getsockaddr() call because getsockaddr() allocates an mbuf and 1350 * an error after that means that I have to release the mbuf. 1351 */ 1352 /* ARGSUSED */ 1353 static int 1354 nfs_cmount(struct mntarg *ma, void *data, uint64_t flags) 1355 { 1356 int error; 1357 struct nfs_args args; 1358 1359 error = copyin(data, &args, sizeof (struct nfs_args)); 1360 if (error) 1361 return error; 1362 1363 ma = mount_arg(ma, "nfs_args", &args, sizeof args); 1364 1365 error = kernel_mount(ma, flags); 1366 return (error); 1367 } 1368 1369 /* 1370 * Common code for mount and mountroot 1371 */ 1372 static int 1373 mountnfs(struct nfs_args *argp, struct mount *mp, struct sockaddr *nam, 1374 char *hst, u_char *krbname, int krbnamelen, u_char *dirpath, int dirlen, 1375 u_char *srvkrbname, int srvkrbnamelen, struct vnode **vpp, 1376 struct ucred *cred, struct thread *td, int nametimeo, int negnametimeo, 1377 int minvers) 1378 { 1379 struct nfsmount *nmp; 1380 struct nfsnode *np; 1381 int error, trycnt, ret; 1382 struct nfsvattr nfsva; 1383 struct nfsclclient *clp; 1384 struct nfsclds *dsp, *tdsp; 1385 uint32_t lease; 1386 static u_int64_t clval = 0; 1387 1388 NFSCL_DEBUG(3, "in mnt\n"); 1389 clp = NULL; 1390 if (mp->mnt_flag & MNT_UPDATE) { 1391 nmp = VFSTONFS(mp); 1392 printf("%s: MNT_UPDATE is no longer handled here\n", __func__); 1393 FREE(nam, M_SONAME); 1394 return (0); 1395 } else { 1396 MALLOC(nmp, struct nfsmount *, sizeof (struct nfsmount) + 1397 krbnamelen + dirlen + srvkrbnamelen + 2, 1398 M_NEWNFSMNT, M_WAITOK | M_ZERO); 1399 TAILQ_INIT(&nmp->nm_bufq); 1400 TAILQ_INIT(&nmp->nm_sess); 1401 if (clval == 0) 1402 clval = (u_int64_t)nfsboottime.tv_sec; 1403 nmp->nm_clval = clval++; 1404 nmp->nm_krbnamelen = krbnamelen; 1405 nmp->nm_dirpathlen = dirlen; 1406 nmp->nm_srvkrbnamelen = srvkrbnamelen; 1407 if (td->td_ucred->cr_uid != (uid_t)0) { 1408 /* 1409 * nm_uid is used to get KerberosV credentials for 1410 * the nfsv4 state handling operations if there is 1411 * no host based principal set. Use the uid of 1412 * this user if not root, since they are doing the 1413 * mount. I don't think setting this for root will 1414 * work, since root normally does not have user 1415 * credentials in a credentials cache. 1416 */ 1417 nmp->nm_uid = td->td_ucred->cr_uid; 1418 } else { 1419 /* 1420 * Just set to -1, so it won't be used. 1421 */ 1422 nmp->nm_uid = (uid_t)-1; 1423 } 1424 1425 /* Copy and null terminate all the names */ 1426 if (nmp->nm_krbnamelen > 0) { 1427 bcopy(krbname, nmp->nm_krbname, nmp->nm_krbnamelen); 1428 nmp->nm_name[nmp->nm_krbnamelen] = '\0'; 1429 } 1430 if (nmp->nm_dirpathlen > 0) { 1431 bcopy(dirpath, NFSMNT_DIRPATH(nmp), 1432 nmp->nm_dirpathlen); 1433 nmp->nm_name[nmp->nm_krbnamelen + nmp->nm_dirpathlen 1434 + 1] = '\0'; 1435 } 1436 if (nmp->nm_srvkrbnamelen > 0) { 1437 bcopy(srvkrbname, NFSMNT_SRVKRBNAME(nmp), 1438 nmp->nm_srvkrbnamelen); 1439 nmp->nm_name[nmp->nm_krbnamelen + nmp->nm_dirpathlen 1440 + nmp->nm_srvkrbnamelen + 2] = '\0'; 1441 } 1442 nmp->nm_sockreq.nr_cred = crhold(cred); 1443 mtx_init(&nmp->nm_sockreq.nr_mtx, "nfssock", NULL, MTX_DEF); 1444 mp->mnt_data = nmp; 1445 nmp->nm_getinfo = nfs_getnlminfo; 1446 nmp->nm_vinvalbuf = ncl_vinvalbuf; 1447 } 1448 vfs_getnewfsid(mp); 1449 nmp->nm_mountp = mp; 1450 mtx_init(&nmp->nm_mtx, "NFSmount lock", NULL, MTX_DEF | MTX_DUPOK); 1451 1452 /* 1453 * Since nfs_decode_args() might optionally set them, these 1454 * need to be set to defaults before the call, so that the 1455 * optional settings aren't overwritten. 1456 */ 1457 nmp->nm_nametimeo = nametimeo; 1458 nmp->nm_negnametimeo = negnametimeo; 1459 nmp->nm_timeo = NFS_TIMEO; 1460 nmp->nm_retry = NFS_RETRANS; 1461 nmp->nm_readahead = NFS_DEFRAHEAD; 1462 1463 /* This is empirical approximation of sqrt(hibufspace) * 256. */ 1464 nmp->nm_wcommitsize = NFS_MAXBSIZE / 256; 1465 while ((long)nmp->nm_wcommitsize * nmp->nm_wcommitsize < hibufspace) 1466 nmp->nm_wcommitsize *= 2; 1467 nmp->nm_wcommitsize *= 256; 1468 1469 if ((argp->flags & NFSMNT_NFSV4) != 0) 1470 nmp->nm_minorvers = minvers; 1471 else 1472 nmp->nm_minorvers = 0; 1473 1474 nfs_decode_args(mp, nmp, argp, hst, cred, td); 1475 1476 /* 1477 * V2 can only handle 32 bit filesizes. A 4GB-1 limit may be too 1478 * high, depending on whether we end up with negative offsets in 1479 * the client or server somewhere. 2GB-1 may be safer. 1480 * 1481 * For V3, ncl_fsinfo will adjust this as necessary. Assume maximum 1482 * that we can handle until we find out otherwise. 1483 */ 1484 if ((argp->flags & (NFSMNT_NFSV3 | NFSMNT_NFSV4)) == 0) 1485 nmp->nm_maxfilesize = 0xffffffffLL; 1486 else 1487 nmp->nm_maxfilesize = OFF_MAX; 1488 1489 if ((argp->flags & (NFSMNT_NFSV3 | NFSMNT_NFSV4)) == 0) { 1490 nmp->nm_wsize = NFS_WSIZE; 1491 nmp->nm_rsize = NFS_RSIZE; 1492 nmp->nm_readdirsize = NFS_READDIRSIZE; 1493 } 1494 nmp->nm_numgrps = NFS_MAXGRPS; 1495 nmp->nm_tprintf_delay = nfs_tprintf_delay; 1496 if (nmp->nm_tprintf_delay < 0) 1497 nmp->nm_tprintf_delay = 0; 1498 nmp->nm_tprintf_initial_delay = nfs_tprintf_initial_delay; 1499 if (nmp->nm_tprintf_initial_delay < 0) 1500 nmp->nm_tprintf_initial_delay = 0; 1501 nmp->nm_fhsize = argp->fhsize; 1502 if (nmp->nm_fhsize > 0) 1503 bcopy((caddr_t)argp->fh, (caddr_t)nmp->nm_fh, argp->fhsize); 1504 bcopy(hst, mp->mnt_stat.f_mntfromname, MNAMELEN); 1505 nmp->nm_nam = nam; 1506 /* Set up the sockets and per-host congestion */ 1507 nmp->nm_sotype = argp->sotype; 1508 nmp->nm_soproto = argp->proto; 1509 nmp->nm_sockreq.nr_prog = NFS_PROG; 1510 if ((argp->flags & NFSMNT_NFSV4)) 1511 nmp->nm_sockreq.nr_vers = NFS_VER4; 1512 else if ((argp->flags & NFSMNT_NFSV3)) 1513 nmp->nm_sockreq.nr_vers = NFS_VER3; 1514 else 1515 nmp->nm_sockreq.nr_vers = NFS_VER2; 1516 1517 1518 if ((error = newnfs_connect(nmp, &nmp->nm_sockreq, cred, td, 0))) 1519 goto bad; 1520 /* For NFSv4.1, get the clientid now. */ 1521 if (nmp->nm_minorvers > 0) { 1522 NFSCL_DEBUG(3, "at getcl\n"); 1523 error = nfscl_getcl(mp, cred, td, 0, &clp); 1524 NFSCL_DEBUG(3, "aft getcl=%d\n", error); 1525 if (error != 0) 1526 goto bad; 1527 } 1528 1529 if (nmp->nm_fhsize == 0 && (nmp->nm_flag & NFSMNT_NFSV4) && 1530 nmp->nm_dirpathlen > 0) { 1531 NFSCL_DEBUG(3, "in dirp\n"); 1532 /* 1533 * If the fhsize on the mount point == 0 for V4, the mount 1534 * path needs to be looked up. 1535 */ 1536 trycnt = 3; 1537 do { 1538 error = nfsrpc_getdirpath(nmp, NFSMNT_DIRPATH(nmp), 1539 cred, td); 1540 NFSCL_DEBUG(3, "aft dirp=%d\n", error); 1541 if (error) 1542 (void) nfs_catnap(PZERO, error, "nfsgetdirp"); 1543 } while (error && --trycnt > 0); 1544 if (error) { 1545 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0); 1546 goto bad; 1547 } 1548 } 1549 1550 /* 1551 * A reference count is needed on the nfsnode representing the 1552 * remote root. If this object is not persistent, then backward 1553 * traversals of the mount point (i.e. "..") will not work if 1554 * the nfsnode gets flushed out of the cache. Ufs does not have 1555 * this problem, because one can identify root inodes by their 1556 * number == ROOTINO (2). 1557 */ 1558 if (nmp->nm_fhsize > 0) { 1559 /* 1560 * Set f_iosize to NFS_DIRBLKSIZ so that bo_bsize gets set 1561 * non-zero for the root vnode. f_iosize will be set correctly 1562 * by nfs_statfs() before any I/O occurs. 1563 */ 1564 mp->mnt_stat.f_iosize = NFS_DIRBLKSIZ; 1565 error = ncl_nget(mp, nmp->nm_fh, nmp->nm_fhsize, &np, 1566 LK_EXCLUSIVE); 1567 if (error) 1568 goto bad; 1569 *vpp = NFSTOV(np); 1570 1571 /* 1572 * Get file attributes and transfer parameters for the 1573 * mountpoint. This has the side effect of filling in 1574 * (*vpp)->v_type with the correct value. 1575 */ 1576 ret = nfsrpc_getattrnovp(nmp, nmp->nm_fh, nmp->nm_fhsize, 1, 1577 cred, td, &nfsva, NULL, &lease); 1578 if (ret) { 1579 /* 1580 * Just set default values to get things going. 1581 */ 1582 NFSBZERO((caddr_t)&nfsva, sizeof (struct nfsvattr)); 1583 nfsva.na_vattr.va_type = VDIR; 1584 nfsva.na_vattr.va_mode = 0777; 1585 nfsva.na_vattr.va_nlink = 100; 1586 nfsva.na_vattr.va_uid = (uid_t)0; 1587 nfsva.na_vattr.va_gid = (gid_t)0; 1588 nfsva.na_vattr.va_fileid = 2; 1589 nfsva.na_vattr.va_gen = 1; 1590 nfsva.na_vattr.va_blocksize = NFS_FABLKSIZE; 1591 nfsva.na_vattr.va_size = 512 * 1024; 1592 lease = 60; 1593 } 1594 (void) nfscl_loadattrcache(vpp, &nfsva, NULL, NULL, 0, 1); 1595 if (nmp->nm_minorvers > 0) { 1596 NFSCL_DEBUG(3, "lease=%d\n", (int)lease); 1597 NFSLOCKCLSTATE(); 1598 clp->nfsc_renew = NFSCL_RENEW(lease); 1599 clp->nfsc_expire = NFSD_MONOSEC + clp->nfsc_renew; 1600 clp->nfsc_clientidrev++; 1601 if (clp->nfsc_clientidrev == 0) 1602 clp->nfsc_clientidrev++; 1603 NFSUNLOCKCLSTATE(); 1604 /* 1605 * Mount will succeed, so the renew thread can be 1606 * started now. 1607 */ 1608 nfscl_start_renewthread(clp); 1609 nfscl_clientrelease(clp); 1610 } 1611 if (argp->flags & NFSMNT_NFSV3) 1612 ncl_fsinfo(nmp, *vpp, cred, td); 1613 1614 /* Mark if the mount point supports NFSv4 ACLs. */ 1615 if ((argp->flags & NFSMNT_NFSV4) != 0 && nfsrv_useacl != 0 && 1616 ret == 0 && 1617 NFSISSET_ATTRBIT(&nfsva.na_suppattr, NFSATTRBIT_ACL)) { 1618 MNT_ILOCK(mp); 1619 mp->mnt_flag |= MNT_NFS4ACLS; 1620 MNT_IUNLOCK(mp); 1621 } 1622 1623 /* 1624 * Lose the lock but keep the ref. 1625 */ 1626 NFSVOPUNLOCK(*vpp, 0); 1627 return (0); 1628 } 1629 error = EIO; 1630 1631 bad: 1632 if (clp != NULL) 1633 nfscl_clientrelease(clp); 1634 newnfs_disconnect(&nmp->nm_sockreq); 1635 crfree(nmp->nm_sockreq.nr_cred); 1636 if (nmp->nm_sockreq.nr_auth != NULL) 1637 AUTH_DESTROY(nmp->nm_sockreq.nr_auth); 1638 mtx_destroy(&nmp->nm_sockreq.nr_mtx); 1639 mtx_destroy(&nmp->nm_mtx); 1640 if (nmp->nm_clp != NULL) { 1641 NFSLOCKCLSTATE(); 1642 LIST_REMOVE(nmp->nm_clp, nfsc_list); 1643 NFSUNLOCKCLSTATE(); 1644 free(nmp->nm_clp, M_NFSCLCLIENT); 1645 } 1646 TAILQ_FOREACH_SAFE(dsp, &nmp->nm_sess, nfsclds_list, tdsp) { 1647 if (dsp != TAILQ_FIRST(&nmp->nm_sess) && 1648 dsp->nfsclds_sockp != NULL) 1649 newnfs_disconnect(dsp->nfsclds_sockp); 1650 nfscl_freenfsclds(dsp); 1651 } 1652 FREE(nmp, M_NEWNFSMNT); 1653 FREE(nam, M_SONAME); 1654 return (error); 1655 } 1656 1657 /* 1658 * unmount system call 1659 */ 1660 static int 1661 nfs_unmount(struct mount *mp, int mntflags) 1662 { 1663 struct thread *td; 1664 struct nfsmount *nmp; 1665 int error, flags = 0, i, trycnt = 0; 1666 struct nfsclds *dsp, *tdsp; 1667 1668 td = curthread; 1669 1670 if (mntflags & MNT_FORCE) 1671 flags |= FORCECLOSE; 1672 nmp = VFSTONFS(mp); 1673 /* 1674 * Goes something like this.. 1675 * - Call vflush() to clear out vnodes for this filesystem 1676 * - Close the socket 1677 * - Free up the data structures 1678 */ 1679 /* In the forced case, cancel any outstanding requests. */ 1680 if (mntflags & MNT_FORCE) { 1681 error = newnfs_nmcancelreqs(nmp); 1682 if (error) 1683 goto out; 1684 /* For a forced close, get rid of the renew thread now */ 1685 nfscl_umount(nmp, td); 1686 } 1687 /* We hold 1 extra ref on the root vnode; see comment in mountnfs(). */ 1688 do { 1689 error = vflush(mp, 1, flags, td); 1690 if ((mntflags & MNT_FORCE) && error != 0 && ++trycnt < 30) 1691 (void) nfs_catnap(PSOCK, error, "newndm"); 1692 } while ((mntflags & MNT_FORCE) && error != 0 && trycnt < 30); 1693 if (error) 1694 goto out; 1695 1696 /* 1697 * We are now committed to the unmount. 1698 */ 1699 if ((mntflags & MNT_FORCE) == 0) 1700 nfscl_umount(nmp, td); 1701 else { 1702 mtx_lock(&nmp->nm_mtx); 1703 nmp->nm_privflag |= NFSMNTP_FORCEDISM; 1704 mtx_unlock(&nmp->nm_mtx); 1705 } 1706 /* Make sure no nfsiods are assigned to this mount. */ 1707 mtx_lock(&ncl_iod_mutex); 1708 for (i = 0; i < NFS_MAXASYNCDAEMON; i++) 1709 if (ncl_iodmount[i] == nmp) { 1710 ncl_iodwant[i] = NFSIOD_AVAILABLE; 1711 ncl_iodmount[i] = NULL; 1712 } 1713 mtx_unlock(&ncl_iod_mutex); 1714 1715 /* 1716 * We can now set mnt_data to NULL and wait for 1717 * nfssvc(NFSSVC_FORCEDISM) to complete. 1718 */ 1719 mtx_lock(&mountlist_mtx); 1720 mtx_lock(&nmp->nm_mtx); 1721 mp->mnt_data = NULL; 1722 mtx_unlock(&mountlist_mtx); 1723 while ((nmp->nm_privflag & NFSMNTP_CANCELRPCS) != 0) 1724 msleep(nmp, &nmp->nm_mtx, PVFS, "nfsfdism", 0); 1725 mtx_unlock(&nmp->nm_mtx); 1726 1727 newnfs_disconnect(&nmp->nm_sockreq); 1728 crfree(nmp->nm_sockreq.nr_cred); 1729 FREE(nmp->nm_nam, M_SONAME); 1730 if (nmp->nm_sockreq.nr_auth != NULL) 1731 AUTH_DESTROY(nmp->nm_sockreq.nr_auth); 1732 mtx_destroy(&nmp->nm_sockreq.nr_mtx); 1733 mtx_destroy(&nmp->nm_mtx); 1734 TAILQ_FOREACH_SAFE(dsp, &nmp->nm_sess, nfsclds_list, tdsp) { 1735 if (dsp != TAILQ_FIRST(&nmp->nm_sess) && 1736 dsp->nfsclds_sockp != NULL) 1737 newnfs_disconnect(dsp->nfsclds_sockp); 1738 nfscl_freenfsclds(dsp); 1739 } 1740 FREE(nmp, M_NEWNFSMNT); 1741 out: 1742 return (error); 1743 } 1744 1745 /* 1746 * Return root of a filesystem 1747 */ 1748 static int 1749 nfs_root(struct mount *mp, int flags, struct vnode **vpp) 1750 { 1751 struct vnode *vp; 1752 struct nfsmount *nmp; 1753 struct nfsnode *np; 1754 int error; 1755 1756 nmp = VFSTONFS(mp); 1757 error = ncl_nget(mp, nmp->nm_fh, nmp->nm_fhsize, &np, flags); 1758 if (error) 1759 return error; 1760 vp = NFSTOV(np); 1761 /* 1762 * Get transfer parameters and attributes for root vnode once. 1763 */ 1764 mtx_lock(&nmp->nm_mtx); 1765 if (NFSHASNFSV3(nmp) && !NFSHASGOTFSINFO(nmp)) { 1766 mtx_unlock(&nmp->nm_mtx); 1767 ncl_fsinfo(nmp, vp, curthread->td_ucred, curthread); 1768 } else 1769 mtx_unlock(&nmp->nm_mtx); 1770 if (vp->v_type == VNON) 1771 vp->v_type = VDIR; 1772 vp->v_vflag |= VV_ROOT; 1773 *vpp = vp; 1774 return (0); 1775 } 1776 1777 /* 1778 * Flush out the buffer cache 1779 */ 1780 /* ARGSUSED */ 1781 static int 1782 nfs_sync(struct mount *mp, int waitfor) 1783 { 1784 struct vnode *vp, *mvp; 1785 struct thread *td; 1786 int error, allerror = 0; 1787 1788 td = curthread; 1789 1790 MNT_ILOCK(mp); 1791 /* 1792 * If a forced dismount is in progress, return from here so that 1793 * the umount(2) syscall doesn't get stuck in VFS_SYNC() before 1794 * calling VFS_UNMOUNT(). 1795 */ 1796 if (NFSCL_FORCEDISM(mp)) { 1797 MNT_IUNLOCK(mp); 1798 return (EBADF); 1799 } 1800 MNT_IUNLOCK(mp); 1801 1802 /* 1803 * Force stale buffer cache information to be flushed. 1804 */ 1805 loop: 1806 MNT_VNODE_FOREACH_ALL(vp, mp, mvp) { 1807 /* XXX Racy bv_cnt check. */ 1808 if (NFSVOPISLOCKED(vp) || vp->v_bufobj.bo_dirty.bv_cnt == 0 || 1809 waitfor == MNT_LAZY) { 1810 VI_UNLOCK(vp); 1811 continue; 1812 } 1813 if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK, td)) { 1814 MNT_VNODE_FOREACH_ALL_ABORT(mp, mvp); 1815 goto loop; 1816 } 1817 error = VOP_FSYNC(vp, waitfor, td); 1818 if (error) 1819 allerror = error; 1820 NFSVOPUNLOCK(vp, 0); 1821 vrele(vp); 1822 } 1823 return (allerror); 1824 } 1825 1826 static int 1827 nfs_sysctl(struct mount *mp, fsctlop_t op, struct sysctl_req *req) 1828 { 1829 struct nfsmount *nmp = VFSTONFS(mp); 1830 struct vfsquery vq; 1831 int error; 1832 1833 bzero(&vq, sizeof(vq)); 1834 switch (op) { 1835 #if 0 1836 case VFS_CTL_NOLOCKS: 1837 val = (nmp->nm_flag & NFSMNT_NOLOCKS) ? 1 : 0; 1838 if (req->oldptr != NULL) { 1839 error = SYSCTL_OUT(req, &val, sizeof(val)); 1840 if (error) 1841 return (error); 1842 } 1843 if (req->newptr != NULL) { 1844 error = SYSCTL_IN(req, &val, sizeof(val)); 1845 if (error) 1846 return (error); 1847 if (val) 1848 nmp->nm_flag |= NFSMNT_NOLOCKS; 1849 else 1850 nmp->nm_flag &= ~NFSMNT_NOLOCKS; 1851 } 1852 break; 1853 #endif 1854 case VFS_CTL_QUERY: 1855 mtx_lock(&nmp->nm_mtx); 1856 if (nmp->nm_state & NFSSTA_TIMEO) 1857 vq.vq_flags |= VQ_NOTRESP; 1858 mtx_unlock(&nmp->nm_mtx); 1859 #if 0 1860 if (!(nmp->nm_flag & NFSMNT_NOLOCKS) && 1861 (nmp->nm_state & NFSSTA_LOCKTIMEO)) 1862 vq.vq_flags |= VQ_NOTRESPLOCK; 1863 #endif 1864 error = SYSCTL_OUT(req, &vq, sizeof(vq)); 1865 break; 1866 case VFS_CTL_TIMEO: 1867 if (req->oldptr != NULL) { 1868 error = SYSCTL_OUT(req, &nmp->nm_tprintf_initial_delay, 1869 sizeof(nmp->nm_tprintf_initial_delay)); 1870 if (error) 1871 return (error); 1872 } 1873 if (req->newptr != NULL) { 1874 error = vfs_suser(mp, req->td); 1875 if (error) 1876 return (error); 1877 error = SYSCTL_IN(req, &nmp->nm_tprintf_initial_delay, 1878 sizeof(nmp->nm_tprintf_initial_delay)); 1879 if (error) 1880 return (error); 1881 if (nmp->nm_tprintf_initial_delay < 0) 1882 nmp->nm_tprintf_initial_delay = 0; 1883 } 1884 break; 1885 default: 1886 return (ENOTSUP); 1887 } 1888 return (0); 1889 } 1890 1891 /* 1892 * Purge any RPCs in progress, so that they will all return errors. 1893 * This allows dounmount() to continue as far as VFS_UNMOUNT() for a 1894 * forced dismount. 1895 */ 1896 static void 1897 nfs_purge(struct mount *mp) 1898 { 1899 struct nfsmount *nmp = VFSTONFS(mp); 1900 1901 newnfs_nmcancelreqs(nmp); 1902 } 1903 1904 /* 1905 * Extract the information needed by the nlm from the nfs vnode. 1906 */ 1907 static void 1908 nfs_getnlminfo(struct vnode *vp, uint8_t *fhp, size_t *fhlenp, 1909 struct sockaddr_storage *sp, int *is_v3p, off_t *sizep, 1910 struct timeval *timeop) 1911 { 1912 struct nfsmount *nmp; 1913 struct nfsnode *np = VTONFS(vp); 1914 1915 nmp = VFSTONFS(vp->v_mount); 1916 if (fhlenp != NULL) 1917 *fhlenp = (size_t)np->n_fhp->nfh_len; 1918 if (fhp != NULL) 1919 bcopy(np->n_fhp->nfh_fh, fhp, np->n_fhp->nfh_len); 1920 if (sp != NULL) 1921 bcopy(nmp->nm_nam, sp, min(nmp->nm_nam->sa_len, sizeof(*sp))); 1922 if (is_v3p != NULL) 1923 *is_v3p = NFS_ISV3(vp); 1924 if (sizep != NULL) 1925 *sizep = np->n_size; 1926 if (timeop != NULL) { 1927 timeop->tv_sec = nmp->nm_timeo / NFS_HZ; 1928 timeop->tv_usec = (nmp->nm_timeo % NFS_HZ) * (1000000 / NFS_HZ); 1929 } 1930 } 1931 1932 /* 1933 * This function prints out an option name, based on the conditional 1934 * argument. 1935 */ 1936 static __inline void nfscl_printopt(struct nfsmount *nmp, int testval, 1937 char *opt, char **buf, size_t *blen) 1938 { 1939 int len; 1940 1941 if (testval != 0 && *blen > strlen(opt)) { 1942 len = snprintf(*buf, *blen, "%s", opt); 1943 if (len != strlen(opt)) 1944 printf("EEK!!\n"); 1945 *buf += len; 1946 *blen -= len; 1947 } 1948 } 1949 1950 /* 1951 * This function printf out an options integer value. 1952 */ 1953 static __inline void nfscl_printoptval(struct nfsmount *nmp, int optval, 1954 char *opt, char **buf, size_t *blen) 1955 { 1956 int len; 1957 1958 if (*blen > strlen(opt) + 1) { 1959 /* Could result in truncated output string. */ 1960 len = snprintf(*buf, *blen, "%s=%d", opt, optval); 1961 if (len < *blen) { 1962 *buf += len; 1963 *blen -= len; 1964 } 1965 } 1966 } 1967 1968 /* 1969 * Load the option flags and values into the buffer. 1970 */ 1971 void nfscl_retopts(struct nfsmount *nmp, char *buffer, size_t buflen) 1972 { 1973 char *buf; 1974 size_t blen; 1975 1976 buf = buffer; 1977 blen = buflen; 1978 nfscl_printopt(nmp, (nmp->nm_flag & NFSMNT_NFSV4) != 0, "nfsv4", &buf, 1979 &blen); 1980 if ((nmp->nm_flag & NFSMNT_NFSV4) != 0) { 1981 nfscl_printoptval(nmp, nmp->nm_minorvers, ",minorversion", &buf, 1982 &blen); 1983 nfscl_printopt(nmp, (nmp->nm_flag & NFSMNT_PNFS) != 0, ",pnfs", 1984 &buf, &blen); 1985 nfscl_printopt(nmp, (nmp->nm_flag & NFSMNT_ONEOPENOWN) != 0 && 1986 nmp->nm_minorvers > 0, ",oneopenown", &buf, &blen); 1987 } 1988 nfscl_printopt(nmp, (nmp->nm_flag & NFSMNT_NFSV3) != 0, "nfsv3", &buf, 1989 &blen); 1990 nfscl_printopt(nmp, (nmp->nm_flag & (NFSMNT_NFSV3 | NFSMNT_NFSV4)) == 0, 1991 "nfsv2", &buf, &blen); 1992 nfscl_printopt(nmp, nmp->nm_sotype == SOCK_STREAM, ",tcp", &buf, &blen); 1993 nfscl_printopt(nmp, nmp->nm_sotype != SOCK_STREAM, ",udp", &buf, &blen); 1994 nfscl_printopt(nmp, (nmp->nm_flag & NFSMNT_RESVPORT) != 0, ",resvport", 1995 &buf, &blen); 1996 nfscl_printopt(nmp, (nmp->nm_flag & NFSMNT_NOCONN) != 0, ",noconn", 1997 &buf, &blen); 1998 nfscl_printopt(nmp, (nmp->nm_flag & NFSMNT_SOFT) == 0, ",hard", &buf, 1999 &blen); 2000 nfscl_printopt(nmp, (nmp->nm_flag & NFSMNT_SOFT) != 0, ",soft", &buf, 2001 &blen); 2002 nfscl_printopt(nmp, (nmp->nm_flag & NFSMNT_INT) != 0, ",intr", &buf, 2003 &blen); 2004 nfscl_printopt(nmp, (nmp->nm_flag & NFSMNT_NOCTO) == 0, ",cto", &buf, 2005 &blen); 2006 nfscl_printopt(nmp, (nmp->nm_flag & NFSMNT_NOCTO) != 0, ",nocto", &buf, 2007 &blen); 2008 nfscl_printopt(nmp, (nmp->nm_flag & NFSMNT_NONCONTIGWR) != 0, 2009 ",noncontigwr", &buf, &blen); 2010 nfscl_printopt(nmp, (nmp->nm_flag & (NFSMNT_NOLOCKD | NFSMNT_NFSV4)) == 2011 0, ",lockd", &buf, &blen); 2012 nfscl_printopt(nmp, (nmp->nm_flag & (NFSMNT_NOLOCKD | NFSMNT_NFSV4)) == 2013 NFSMNT_NOLOCKD, ",nolockd", &buf, &blen); 2014 nfscl_printopt(nmp, (nmp->nm_flag & NFSMNT_RDIRPLUS) != 0, ",rdirplus", 2015 &buf, &blen); 2016 nfscl_printopt(nmp, (nmp->nm_flag & NFSMNT_KERB) == 0, ",sec=sys", 2017 &buf, &blen); 2018 nfscl_printopt(nmp, (nmp->nm_flag & (NFSMNT_KERB | NFSMNT_INTEGRITY | 2019 NFSMNT_PRIVACY)) == NFSMNT_KERB, ",sec=krb5", &buf, &blen); 2020 nfscl_printopt(nmp, (nmp->nm_flag & (NFSMNT_KERB | NFSMNT_INTEGRITY | 2021 NFSMNT_PRIVACY)) == (NFSMNT_KERB | NFSMNT_INTEGRITY), ",sec=krb5i", 2022 &buf, &blen); 2023 nfscl_printopt(nmp, (nmp->nm_flag & (NFSMNT_KERB | NFSMNT_INTEGRITY | 2024 NFSMNT_PRIVACY)) == (NFSMNT_KERB | NFSMNT_PRIVACY), ",sec=krb5p", 2025 &buf, &blen); 2026 nfscl_printoptval(nmp, nmp->nm_acdirmin, ",acdirmin", &buf, &blen); 2027 nfscl_printoptval(nmp, nmp->nm_acdirmax, ",acdirmax", &buf, &blen); 2028 nfscl_printoptval(nmp, nmp->nm_acregmin, ",acregmin", &buf, &blen); 2029 nfscl_printoptval(nmp, nmp->nm_acregmax, ",acregmax", &buf, &blen); 2030 nfscl_printoptval(nmp, nmp->nm_nametimeo, ",nametimeo", &buf, &blen); 2031 nfscl_printoptval(nmp, nmp->nm_negnametimeo, ",negnametimeo", &buf, 2032 &blen); 2033 nfscl_printoptval(nmp, nmp->nm_rsize, ",rsize", &buf, &blen); 2034 nfscl_printoptval(nmp, nmp->nm_wsize, ",wsize", &buf, &blen); 2035 nfscl_printoptval(nmp, nmp->nm_readdirsize, ",readdirsize", &buf, 2036 &blen); 2037 nfscl_printoptval(nmp, nmp->nm_readahead, ",readahead", &buf, &blen); 2038 nfscl_printoptval(nmp, nmp->nm_wcommitsize, ",wcommitsize", &buf, 2039 &blen); 2040 nfscl_printoptval(nmp, nmp->nm_timeo, ",timeout", &buf, &blen); 2041 nfscl_printoptval(nmp, nmp->nm_retry, ",retrans", &buf, &blen); 2042 } 2043
Cache object: 53c3f5b167df9b1f86643fde6a632410
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