Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]
FreeBSD/Linux Kernel Cross Reference
sys/nfsclient/nfs_vfsops.c
Version:
- FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
SearchContext: - none - 3 - 10
SearchContext: - none - 3 - 10
1 /*- 2 * Copyright (c) 1989, 1993, 1995 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Rick Macklem at The University of Guelph. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 4. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * @(#)nfs_vfsops.c 8.12 (Berkeley) 5/20/95 33 */ 34 35 #include <sys/cdefs.h> 36 __FBSDID("$FreeBSD$"); 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/lock.h> 49 #include <sys/malloc.h> 50 #include <sys/mbuf.h> 51 #include <sys/module.h> 52 #include <sys/mount.h> 53 #include <sys/proc.h> 54 #include <sys/socket.h> 55 #include <sys/socketvar.h> 56 #include <sys/sockio.h> 57 #include <sys/sysctl.h> 58 #include <sys/vnode.h> 59 #include <sys/signalvar.h> 60 61 #include <vm/vm.h> 62 #include <vm/vm_extern.h> 63 #include <vm/uma.h> 64 65 #include <net/if.h> 66 #include <net/route.h> 67 #include <netinet/in.h> 68 69 #include <rpc/rpcclnt.h> 70 71 #include <nfs/rpcv2.h> 72 #include <nfs/nfsproto.h> 73 #include <nfsclient/nfs.h> 74 #include <nfsclient/nfsnode.h> 75 #include <nfsclient/nfsmount.h> 76 #include <nfs/xdr_subs.h> 77 #include <nfsclient/nfsm_subs.h> 78 #include <nfsclient/nfsdiskless.h> 79 80 MALLOC_DEFINE(M_NFSREQ, "nfsclient_req", "NFS request header"); 81 MALLOC_DEFINE(M_NFSBIGFH, "nfsclient_bigfh", "NFS version 3 file handle"); 82 MALLOC_DEFINE(M_NFSDIROFF, "nfsclient_diroff", "NFS directory offset data"); 83 MALLOC_DEFINE(M_NFSHASH, "nfsclient_hash", "NFS hash tables"); 84 MALLOC_DEFINE(M_NFSDIRECTIO, "nfsclient_directio", "NFS Direct IO async write state"); 85 86 uma_zone_t nfsmount_zone; 87 88 struct nfsstats nfsstats; 89 90 SYSCTL_NODE(_vfs, OID_AUTO, nfs, CTLFLAG_RW, 0, "NFS filesystem"); 91 SYSCTL_STRUCT(_vfs_nfs, NFS_NFSSTATS, nfsstats, CTLFLAG_RW, 92 &nfsstats, nfsstats, "S,nfsstats"); 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 #ifdef NFS_DEBUG 97 int nfs_debug; 98 SYSCTL_INT(_vfs_nfs, OID_AUTO, debug, CTLFLAG_RW, &nfs_debug, 0, ""); 99 #endif 100 static int nfs_tprintf_initial_delay = NFS_TPRINTF_INITIAL_DELAY; 101 SYSCTL_INT(_vfs_nfs, NFS_TPRINTF_INITIAL_DELAY, 102 downdelayinitial, CTLFLAG_RW, &nfs_tprintf_initial_delay, 0, ""); 103 /* how long between console messages "nfs server foo not responding" */ 104 static int nfs_tprintf_delay = NFS_TPRINTF_DELAY; 105 SYSCTL_INT(_vfs_nfs, NFS_TPRINTF_DELAY, 106 downdelayinterval, CTLFLAG_RW, &nfs_tprintf_delay, 0, ""); 107 108 static void nfs_decode_args(struct mount *mp, struct nfsmount *nmp, 109 struct nfs_args *argp, const char *hostname); 110 static int mountnfs(struct nfs_args *, struct mount *, 111 struct sockaddr *, char *, struct vnode **, 112 struct ucred *cred); 113 static vfs_mount_t nfs_mount; 114 static vfs_cmount_t nfs_cmount; 115 static vfs_unmount_t nfs_unmount; 116 static vfs_root_t nfs_root; 117 static vfs_statfs_t nfs_statfs; 118 static vfs_sync_t nfs_sync; 119 static vfs_sysctl_t nfs_sysctl; 120 121 /* 122 * nfs vfs operations. 123 */ 124 static struct vfsops nfs_vfsops = { 125 .vfs_init = nfs_init, 126 .vfs_mount = nfs_mount, 127 .vfs_cmount = nfs_cmount, 128 .vfs_root = nfs_root, 129 .vfs_statfs = nfs_statfs, 130 .vfs_sync = nfs_sync, 131 .vfs_uninit = nfs_uninit, 132 .vfs_unmount = nfs_unmount, 133 .vfs_sysctl = nfs_sysctl, 134 }; 135 VFS_SET(nfs_vfsops, nfs, VFCF_NETWORK); 136 137 /* So that loader and kldload(2) can find us, wherever we are.. */ 138 MODULE_VERSION(nfs, 1); 139 140 static struct nfs_rpcops nfs_rpcops = { 141 nfs_readrpc, 142 nfs_writerpc, 143 nfs_writebp, 144 nfs_readlinkrpc, 145 nfs_invaldir, 146 nfs_commit, 147 }; 148 149 /* 150 * This structure must be filled in by a primary bootstrap or bootstrap 151 * server for a diskless/dataless machine. It is initialized below just 152 * to ensure that it is allocated to initialized data (.data not .bss). 153 */ 154 struct nfs_diskless nfs_diskless = { { { 0 } } }; 155 struct nfsv3_diskless nfsv3_diskless = { { { 0 } } }; 156 int nfs_diskless_valid = 0; 157 158 SYSCTL_INT(_vfs_nfs, OID_AUTO, diskless_valid, CTLFLAG_RD, 159 &nfs_diskless_valid, 0, ""); 160 161 SYSCTL_STRING(_vfs_nfs, OID_AUTO, diskless_rootpath, CTLFLAG_RD, 162 nfsv3_diskless.root_hostnam, 0, ""); 163 164 SYSCTL_OPAQUE(_vfs_nfs, OID_AUTO, diskless_rootaddr, CTLFLAG_RD, 165 &nfsv3_diskless.root_saddr, sizeof nfsv3_diskless.root_saddr, 166 "%Ssockaddr_in", ""); 167 168 169 void nfsargs_ntoh(struct nfs_args *); 170 static int nfs_mountdiskless(char *, int, 171 struct sockaddr_in *, struct nfs_args *, 172 struct thread *, struct vnode **, struct mount *); 173 static void nfs_convert_diskless(void); 174 static void nfs_convert_oargs(struct nfs_args *args, 175 struct onfs_args *oargs); 176 177 int 178 nfs_iosize(struct nfsmount *nmp) 179 { 180 int iosize; 181 182 /* 183 * Calculate the size used for io buffers. Use the larger 184 * of the two sizes to minimise nfs requests but make sure 185 * that it is at least one VM page to avoid wasting buffer 186 * space. 187 */ 188 iosize = imax(nmp->nm_rsize, nmp->nm_wsize); 189 iosize = imax(iosize, PAGE_SIZE); 190 return (iosize); 191 } 192 193 static void 194 nfs_convert_oargs(struct nfs_args *args, struct onfs_args *oargs) 195 { 196 197 args->version = NFS_ARGSVERSION; 198 args->addr = oargs->addr; 199 args->addrlen = oargs->addrlen; 200 args->sotype = oargs->sotype; 201 args->proto = oargs->proto; 202 args->fh = oargs->fh; 203 args->fhsize = oargs->fhsize; 204 args->flags = oargs->flags; 205 args->wsize = oargs->wsize; 206 args->rsize = oargs->rsize; 207 args->readdirsize = oargs->readdirsize; 208 args->timeo = oargs->timeo; 209 args->retrans = oargs->retrans; 210 args->maxgrouplist = oargs->maxgrouplist; 211 args->readahead = oargs->readahead; 212 args->deadthresh = oargs->deadthresh; 213 args->hostname = oargs->hostname; 214 } 215 216 static void 217 nfs_convert_diskless(void) 218 { 219 220 bcopy(&nfs_diskless.myif, &nfsv3_diskless.myif, 221 sizeof(struct ifaliasreq)); 222 bcopy(&nfs_diskless.mygateway, &nfsv3_diskless.mygateway, 223 sizeof(struct sockaddr_in)); 224 nfs_convert_oargs(&nfsv3_diskless.root_args,&nfs_diskless.root_args); 225 if (nfsv3_diskless.root_args.flags & NFSMNT_NFSV3) { 226 nfsv3_diskless.root_fhsize = NFSX_V3FH; 227 bcopy(nfs_diskless.root_fh, nfsv3_diskless.root_fh, NFSX_V3FH); 228 } else { 229 nfsv3_diskless.root_fhsize = NFSX_V2FH; 230 bcopy(nfs_diskless.root_fh, nfsv3_diskless.root_fh, NFSX_V2FH); 231 } 232 bcopy(&nfs_diskless.root_saddr,&nfsv3_diskless.root_saddr, 233 sizeof(struct sockaddr_in)); 234 bcopy(nfs_diskless.root_hostnam, nfsv3_diskless.root_hostnam, MNAMELEN); 235 nfsv3_diskless.root_time = nfs_diskless.root_time; 236 bcopy(nfs_diskless.my_hostnam, nfsv3_diskless.my_hostnam, 237 MAXHOSTNAMELEN); 238 nfs_diskless_valid = 3; 239 } 240 241 /* 242 * nfs statfs call 243 */ 244 static int 245 nfs_statfs(struct mount *mp, struct statfs *sbp, struct thread *td) 246 { 247 struct vnode *vp; 248 struct nfs_statfs *sfp; 249 caddr_t bpos, dpos; 250 struct nfsmount *nmp = VFSTONFS(mp); 251 int error = 0, v3 = (nmp->nm_flag & NFSMNT_NFSV3), retattr; 252 struct mbuf *mreq, *mrep, *md, *mb; 253 struct nfsnode *np; 254 u_quad_t tquad; 255 256 #ifndef nolint 257 sfp = NULL; 258 #endif 259 error = vfs_busy(mp, LK_NOWAIT, NULL, td); 260 if (error) 261 return (error); 262 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np, LK_EXCLUSIVE); 263 if (error) { 264 vfs_unbusy(mp, td); 265 return (error); 266 } 267 vp = NFSTOV(np); 268 mtx_lock(&nmp->nm_mtx); 269 if (v3 && (nmp->nm_state & NFSSTA_GOTFSINFO) == 0) { 270 mtx_unlock(&nmp->nm_mtx); 271 (void)nfs_fsinfo(nmp, vp, td->td_ucred, td); 272 } else 273 mtx_unlock(&nmp->nm_mtx); 274 nfsstats.rpccnt[NFSPROC_FSSTAT]++; 275 mreq = nfsm_reqhead(vp, NFSPROC_FSSTAT, NFSX_FH(v3)); 276 mb = mreq; 277 bpos = mtod(mb, caddr_t); 278 nfsm_fhtom(vp, v3); 279 nfsm_request(vp, NFSPROC_FSSTAT, td, td->td_ucred); 280 if (v3) 281 nfsm_postop_attr(vp, retattr); 282 if (error) { 283 if (mrep != NULL) 284 m_freem(mrep); 285 goto nfsmout; 286 } 287 sfp = nfsm_dissect(struct nfs_statfs *, NFSX_STATFS(v3)); 288 mtx_lock(&nmp->nm_mtx); 289 sbp->f_iosize = nfs_iosize(nmp); 290 mtx_unlock(&nmp->nm_mtx); 291 if (v3) { 292 sbp->f_bsize = NFS_FABLKSIZE; 293 tquad = fxdr_hyper(&sfp->sf_tbytes); 294 sbp->f_blocks = tquad / NFS_FABLKSIZE; 295 tquad = fxdr_hyper(&sfp->sf_fbytes); 296 sbp->f_bfree = tquad / NFS_FABLKSIZE; 297 tquad = fxdr_hyper(&sfp->sf_abytes); 298 sbp->f_bavail = tquad / NFS_FABLKSIZE; 299 sbp->f_files = (fxdr_unsigned(int32_t, 300 sfp->sf_tfiles.nfsuquad[1]) & 0x7fffffff); 301 sbp->f_ffree = (fxdr_unsigned(int32_t, 302 sfp->sf_ffiles.nfsuquad[1]) & 0x7fffffff); 303 } else { 304 sbp->f_bsize = fxdr_unsigned(int32_t, sfp->sf_bsize); 305 sbp->f_blocks = fxdr_unsigned(int32_t, sfp->sf_blocks); 306 sbp->f_bfree = fxdr_unsigned(int32_t, sfp->sf_bfree); 307 sbp->f_bavail = fxdr_unsigned(int32_t, sfp->sf_bavail); 308 sbp->f_files = 0; 309 sbp->f_ffree = 0; 310 } 311 m_freem(mrep); 312 nfsmout: 313 vput(vp); 314 vfs_unbusy(mp, td); 315 return (error); 316 } 317 318 /* 319 * nfs version 3 fsinfo rpc call 320 */ 321 int 322 nfs_fsinfo(struct nfsmount *nmp, struct vnode *vp, struct ucred *cred, 323 struct thread *td) 324 { 325 struct nfsv3_fsinfo *fsp; 326 u_int32_t pref, max; 327 caddr_t bpos, dpos; 328 int error = 0, retattr; 329 struct mbuf *mreq, *mrep, *md, *mb; 330 u_int64_t maxfsize; 331 332 nfsstats.rpccnt[NFSPROC_FSINFO]++; 333 mreq = nfsm_reqhead(vp, NFSPROC_FSINFO, NFSX_FH(1)); 334 mb = mreq; 335 bpos = mtod(mb, caddr_t); 336 nfsm_fhtom(vp, 1); 337 nfsm_request(vp, NFSPROC_FSINFO, td, cred); 338 nfsm_postop_attr(vp, retattr); 339 if (!error) { 340 fsp = nfsm_dissect(struct nfsv3_fsinfo *, NFSX_V3FSINFO); 341 pref = fxdr_unsigned(u_int32_t, fsp->fs_wtpref); 342 mtx_lock(&nmp->nm_mtx); 343 if (pref < nmp->nm_wsize && pref >= NFS_FABLKSIZE) 344 nmp->nm_wsize = (pref + NFS_FABLKSIZE - 1) & 345 ~(NFS_FABLKSIZE - 1); 346 max = fxdr_unsigned(u_int32_t, fsp->fs_wtmax); 347 if (max < nmp->nm_wsize && max > 0) { 348 nmp->nm_wsize = max & ~(NFS_FABLKSIZE - 1); 349 if (nmp->nm_wsize == 0) 350 nmp->nm_wsize = max; 351 } 352 pref = fxdr_unsigned(u_int32_t, fsp->fs_rtpref); 353 if (pref < nmp->nm_rsize && pref >= NFS_FABLKSIZE) 354 nmp->nm_rsize = (pref + NFS_FABLKSIZE - 1) & 355 ~(NFS_FABLKSIZE - 1); 356 max = fxdr_unsigned(u_int32_t, fsp->fs_rtmax); 357 if (max < nmp->nm_rsize && max > 0) { 358 nmp->nm_rsize = max & ~(NFS_FABLKSIZE - 1); 359 if (nmp->nm_rsize == 0) 360 nmp->nm_rsize = max; 361 } 362 pref = fxdr_unsigned(u_int32_t, fsp->fs_dtpref); 363 if (pref < nmp->nm_readdirsize && pref >= NFS_DIRBLKSIZ) 364 nmp->nm_readdirsize = (pref + NFS_DIRBLKSIZ - 1) & 365 ~(NFS_DIRBLKSIZ - 1); 366 if (max < nmp->nm_readdirsize && max > 0) { 367 nmp->nm_readdirsize = max & ~(NFS_DIRBLKSIZ - 1); 368 if (nmp->nm_readdirsize == 0) 369 nmp->nm_readdirsize = max; 370 } 371 maxfsize = fxdr_hyper(&fsp->fs_maxfilesize); 372 if (maxfsize > 0 && maxfsize < nmp->nm_maxfilesize) 373 nmp->nm_maxfilesize = maxfsize; 374 nmp->nm_mountp->mnt_stat.f_iosize = nfs_iosize(nmp); 375 nmp->nm_state |= NFSSTA_GOTFSINFO; 376 mtx_unlock(&nmp->nm_mtx); 377 } 378 m_freem(mrep); 379 nfsmout: 380 return (error); 381 } 382 383 /* 384 * Mount a remote root fs via. nfs. This depends on the info in the 385 * nfs_diskless structure that has been filled in properly by some primary 386 * bootstrap. 387 * It goes something like this: 388 * - do enough of "ifconfig" by calling ifioctl() so that the system 389 * can talk to the server 390 * - If nfs_diskless.mygateway is filled in, use that address as 391 * a default gateway. 392 * - build the rootfs mount point and call mountnfs() to do the rest. 393 * 394 * It is assumed to be safe to read, modify, and write the nfsv3_diskless 395 * structure, as well as other global NFS client variables here, as 396 * nfs_mountroot() will be called once in the boot before any other NFS 397 * client activity occurs. 398 */ 399 int 400 nfs_mountroot(struct mount *mp, struct thread *td) 401 { 402 struct nfsv3_diskless *nd = &nfsv3_diskless; 403 struct socket *so; 404 struct vnode *vp; 405 struct ifreq ir; 406 int error, i; 407 u_long l; 408 char buf[128]; 409 char *cp; 410 411 #if defined(BOOTP_NFSROOT) && defined(BOOTP) 412 bootpc_init(); /* use bootp to get nfs_diskless filled in */ 413 #elif defined(NFS_ROOT) 414 nfs_setup_diskless(); 415 #endif 416 417 if (nfs_diskless_valid == 0) 418 return (-1); 419 if (nfs_diskless_valid == 1) 420 nfs_convert_diskless(); 421 422 /* 423 * XXX splnet, so networks will receive... 424 */ 425 splnet(); 426 427 /* 428 * Do enough of ifconfig(8) so that the critical net interface can 429 * talk to the server. 430 */ 431 error = socreate(nd->myif.ifra_addr.sa_family, &so, nd->root_args.sotype, 0, 432 td->td_ucred, td); 433 if (error) 434 panic("nfs_mountroot: socreate(%04x): %d", 435 nd->myif.ifra_addr.sa_family, error); 436 437 #if 0 /* XXX Bad idea */ 438 /* 439 * We might not have been told the right interface, so we pass 440 * over the first ten interfaces of the same kind, until we get 441 * one of them configured. 442 */ 443 444 for (i = strlen(nd->myif.ifra_name) - 1; 445 nd->myif.ifra_name[i] >= '' && 446 nd->myif.ifra_name[i] <= '9'; 447 nd->myif.ifra_name[i] ++) { 448 error = ifioctl(so, SIOCAIFADDR, (caddr_t)&nd->myif, td); 449 if(!error) 450 break; 451 } 452 #endif 453 error = ifioctl(so, SIOCAIFADDR, (caddr_t)&nd->myif, td); 454 if (error) 455 panic("nfs_mountroot: SIOCAIFADDR: %d", error); 456 if ((cp = getenv("boot.netif.mtu")) != NULL) { 457 ir.ifr_mtu = strtol(cp, NULL, 10); 458 bcopy(nd->myif.ifra_name, ir.ifr_name, IFNAMSIZ); 459 freeenv(cp); 460 error = ifioctl(so, SIOCSIFMTU, (caddr_t)&ir, td); 461 if (error) 462 printf("nfs_mountroot: SIOCSIFMTU: %d", error); 463 } 464 soclose(so); 465 466 /* 467 * If the gateway field is filled in, set it as the default route. 468 * Note that pxeboot will set a default route of 0 if the route 469 * is not set by the DHCP server. Check also for a value of 0 470 * to avoid panicking inappropriately in that situation. 471 */ 472 if (nd->mygateway.sin_len != 0 && 473 nd->mygateway.sin_addr.s_addr != 0) { 474 struct sockaddr_in mask, sin; 475 476 bzero((caddr_t)&mask, sizeof(mask)); 477 sin = mask; 478 sin.sin_family = AF_INET; 479 sin.sin_len = sizeof(sin); 480 /* XXX MRT use table 0 for this sort of thing */ 481 error = rtrequest(RTM_ADD, (struct sockaddr *)&sin, 482 (struct sockaddr *)&nd->mygateway, 483 (struct sockaddr *)&mask, 484 RTF_UP | RTF_GATEWAY, NULL); 485 if (error) 486 panic("nfs_mountroot: RTM_ADD: %d", error); 487 } 488 489 /* 490 * Create the rootfs mount point. 491 */ 492 nd->root_args.fh = nd->root_fh; 493 nd->root_args.fhsize = nd->root_fhsize; 494 l = ntohl(nd->root_saddr.sin_addr.s_addr); 495 snprintf(buf, sizeof(buf), "%ld.%ld.%ld.%ld:%s", 496 (l >> 24) & 0xff, (l >> 16) & 0xff, 497 (l >> 8) & 0xff, (l >> 0) & 0xff, nd->root_hostnam); 498 printf("NFS ROOT: %s\n", buf); 499 nd->root_args.hostname = buf; 500 if ((error = nfs_mountdiskless(buf, MNT_RDONLY, 501 &nd->root_saddr, &nd->root_args, td, &vp, mp)) != 0) { 502 return (error); 503 } 504 505 /* 506 * This is not really an nfs issue, but it is much easier to 507 * set hostname here and then let the "/etc/rc.xxx" files 508 * mount the right /var based upon its preset value. 509 */ 510 bcopy(nd->my_hostnam, hostname, MAXHOSTNAMELEN); 511 hostname[MAXHOSTNAMELEN - 1] = '\0'; 512 for (i = 0; i < MAXHOSTNAMELEN; i++) 513 if (hostname[i] == '\0') 514 break; 515 inittodr(ntohl(nd->root_time)); 516 return (0); 517 } 518 519 /* 520 * Internal version of mount system call for diskless setup. 521 */ 522 static int 523 nfs_mountdiskless(char *path, int mountflag, 524 struct sockaddr_in *sin, struct nfs_args *args, struct thread *td, 525 struct vnode **vpp, struct mount *mp) 526 { 527 struct sockaddr *nam; 528 int error; 529 530 MNT_ILOCK(mp); 531 mp->mnt_kern_flag = 0; 532 mp->mnt_flag = mountflag; 533 MNT_IUNLOCK(mp); 534 nam = sodupsockaddr((struct sockaddr *)sin, M_WAITOK); 535 if ((error = mountnfs(args, mp, nam, path, vpp, 536 td->td_ucred)) != 0) { 537 printf("nfs_mountroot: mount %s on /: %d\n", path, error); 538 return (error); 539 } 540 return (0); 541 } 542 543 static void 544 nfs_decode_args(struct mount *mp, struct nfsmount *nmp, struct nfs_args *argp, 545 const char *hostname) 546 { 547 int s; 548 int adjsock; 549 int maxio; 550 char *p; 551 552 s = splnet(); 553 554 /* 555 * Set read-only flag if requested; otherwise, clear it if this is 556 * an update. If this is not an update, then either the read-only 557 * flag is already clear, or this is a root mount and it was set 558 * intentionally at some previous point. 559 */ 560 if (vfs_getopt(mp->mnt_optnew, "ro", NULL, NULL) == 0) { 561 MNT_ILOCK(mp); 562 mp->mnt_flag |= MNT_RDONLY; 563 MNT_IUNLOCK(mp); 564 } else if (mp->mnt_flag & MNT_UPDATE) { 565 MNT_ILOCK(mp); 566 mp->mnt_flag &= ~MNT_RDONLY; 567 MNT_IUNLOCK(mp); 568 } 569 570 /* 571 * Silently clear NFSMNT_NOCONN if it's a TCP mount, it makes 572 * no sense in that context. Also, set up appropriate retransmit 573 * and soft timeout behavior. 574 */ 575 if (argp->sotype == SOCK_STREAM) { 576 nmp->nm_flag &= ~NFSMNT_NOCONN; 577 nmp->nm_flag |= NFSMNT_DUMBTIMR; 578 nmp->nm_timeo = NFS_MAXTIMEO; 579 nmp->nm_retry = NFS_RETRANS_TCP; 580 } 581 582 /* Also clear RDIRPLUS if not NFSv3, it crashes some servers */ 583 if ((argp->flags & NFSMNT_NFSV3) == 0) 584 nmp->nm_flag &= ~NFSMNT_RDIRPLUS; 585 586 /* Re-bind if rsrvd port requested and wasn't on one */ 587 adjsock = !(nmp->nm_flag & NFSMNT_RESVPORT) 588 && (argp->flags & NFSMNT_RESVPORT); 589 /* Also re-bind if we're switching to/from a connected UDP socket */ 590 adjsock |= ((nmp->nm_flag & NFSMNT_NOCONN) != 591 (argp->flags & NFSMNT_NOCONN)); 592 593 /* Update flags atomically. Don't change the lock bits. */ 594 nmp->nm_flag = argp->flags | nmp->nm_flag; 595 splx(s); 596 597 if ((argp->flags & NFSMNT_TIMEO) && argp->timeo > 0) { 598 nmp->nm_timeo = (argp->timeo * NFS_HZ + 5) / 10; 599 if (nmp->nm_timeo < NFS_MINTIMEO) 600 nmp->nm_timeo = NFS_MINTIMEO; 601 else if (nmp->nm_timeo > NFS_MAXTIMEO) 602 nmp->nm_timeo = NFS_MAXTIMEO; 603 } 604 605 if ((argp->flags & NFSMNT_RETRANS) && argp->retrans > 1) { 606 nmp->nm_retry = argp->retrans; 607 if (nmp->nm_retry > NFS_MAXREXMIT) 608 nmp->nm_retry = NFS_MAXREXMIT; 609 } 610 611 if (argp->flags & NFSMNT_NFSV3) { 612 if (argp->sotype == SOCK_DGRAM) 613 maxio = NFS_MAXDGRAMDATA; 614 else 615 maxio = NFS_MAXDATA; 616 } else 617 maxio = NFS_V2MAXDATA; 618 619 if ((argp->flags & NFSMNT_WSIZE) && argp->wsize > 0) { 620 nmp->nm_wsize = argp->wsize; 621 /* Round down to multiple of blocksize */ 622 nmp->nm_wsize &= ~(NFS_FABLKSIZE - 1); 623 if (nmp->nm_wsize <= 0) 624 nmp->nm_wsize = NFS_FABLKSIZE; 625 } 626 if (nmp->nm_wsize > maxio) 627 nmp->nm_wsize = maxio; 628 if (nmp->nm_wsize > MAXBSIZE) 629 nmp->nm_wsize = MAXBSIZE; 630 631 if ((argp->flags & NFSMNT_RSIZE) && argp->rsize > 0) { 632 nmp->nm_rsize = argp->rsize; 633 /* Round down to multiple of blocksize */ 634 nmp->nm_rsize &= ~(NFS_FABLKSIZE - 1); 635 if (nmp->nm_rsize <= 0) 636 nmp->nm_rsize = NFS_FABLKSIZE; 637 } 638 if (nmp->nm_rsize > maxio) 639 nmp->nm_rsize = maxio; 640 if (nmp->nm_rsize > MAXBSIZE) 641 nmp->nm_rsize = MAXBSIZE; 642 643 if ((argp->flags & NFSMNT_READDIRSIZE) && argp->readdirsize > 0) { 644 nmp->nm_readdirsize = argp->readdirsize; 645 } 646 if (nmp->nm_readdirsize > maxio) 647 nmp->nm_readdirsize = maxio; 648 if (nmp->nm_readdirsize > nmp->nm_rsize) 649 nmp->nm_readdirsize = nmp->nm_rsize; 650 651 if ((argp->flags & NFSMNT_ACREGMIN) && argp->acregmin >= 0) 652 nmp->nm_acregmin = argp->acregmin; 653 else 654 nmp->nm_acregmin = NFS_MINATTRTIMO; 655 if ((argp->flags & NFSMNT_ACREGMAX) && argp->acregmax >= 0) 656 nmp->nm_acregmax = argp->acregmax; 657 else 658 nmp->nm_acregmax = NFS_MAXATTRTIMO; 659 if ((argp->flags & NFSMNT_ACDIRMIN) && argp->acdirmin >= 0) 660 nmp->nm_acdirmin = argp->acdirmin; 661 else 662 nmp->nm_acdirmin = NFS_MINDIRATTRTIMO; 663 if ((argp->flags & NFSMNT_ACDIRMAX) && argp->acdirmax >= 0) 664 nmp->nm_acdirmax = argp->acdirmax; 665 else 666 nmp->nm_acdirmax = NFS_MAXDIRATTRTIMO; 667 if (nmp->nm_acdirmin > nmp->nm_acdirmax) 668 nmp->nm_acdirmin = nmp->nm_acdirmax; 669 if (nmp->nm_acregmin > nmp->nm_acregmax) 670 nmp->nm_acregmin = nmp->nm_acregmax; 671 672 if ((argp->flags & NFSMNT_MAXGRPS) && argp->maxgrouplist >= 0) { 673 if (argp->maxgrouplist <= NFS_MAXGRPS) 674 nmp->nm_numgrps = argp->maxgrouplist; 675 else 676 nmp->nm_numgrps = NFS_MAXGRPS; 677 } 678 if ((argp->flags & NFSMNT_READAHEAD) && argp->readahead >= 0) { 679 if (argp->readahead <= NFS_MAXRAHEAD) 680 nmp->nm_readahead = argp->readahead; 681 else 682 nmp->nm_readahead = NFS_MAXRAHEAD; 683 } 684 if ((argp->flags & NFSMNT_WCOMMITSIZE) && argp->wcommitsize >= 0) { 685 if (argp->wcommitsize < nmp->nm_wsize) 686 nmp->nm_wcommitsize = nmp->nm_wsize; 687 else 688 nmp->nm_wcommitsize = argp->wcommitsize; 689 } 690 if ((argp->flags & NFSMNT_DEADTHRESH) && argp->deadthresh >= 0) { 691 if (argp->deadthresh <= NFS_MAXDEADTHRESH) 692 nmp->nm_deadthresh = argp->deadthresh; 693 else 694 nmp->nm_deadthresh = NFS_MAXDEADTHRESH; 695 } 696 697 adjsock |= ((nmp->nm_sotype != argp->sotype) || 698 (nmp->nm_soproto != argp->proto)); 699 nmp->nm_sotype = argp->sotype; 700 nmp->nm_soproto = argp->proto; 701 702 if (nmp->nm_so && adjsock) { 703 nfs_safedisconnect(nmp); 704 if (nmp->nm_sotype == SOCK_DGRAM) 705 while (nfs_connect(nmp, NULL)) { 706 printf("nfs_args: retrying connect\n"); 707 (void) tsleep((caddr_t)&lbolt, PSOCK, "nfscon", 0); 708 } 709 } 710 711 if (hostname) { 712 strlcpy(nmp->nm_hostname, hostname, 713 sizeof(nmp->nm_hostname)); 714 p = strchr(nmp->nm_hostname, ':'); 715 if (p) 716 *p = '\0'; 717 } 718 } 719 720 static const char *nfs_opts[] = { "from", "nfs_args", NULL }; 721 722 /* 723 * VFS Operations. 724 * 725 * mount system call 726 * It seems a bit dumb to copyinstr() the host and path here and then 727 * bcopy() them in mountnfs(), but I wanted to detect errors before 728 * doing the sockargs() call because sockargs() allocates an mbuf and 729 * an error after that means that I have to release the mbuf. 730 */ 731 /* ARGSUSED */ 732 static int 733 nfs_mount(struct mount *mp, struct thread *td) 734 { 735 int error; 736 struct nfs_args args; 737 struct sockaddr *nam; 738 struct vnode *vp; 739 char hst[MNAMELEN]; 740 size_t len; 741 u_char nfh[NFSX_V3FHMAX]; 742 743 if (vfs_filteropt(mp->mnt_optnew, nfs_opts)) { 744 error = EINVAL; 745 goto out; 746 } 747 748 if (mp->mnt_flag & MNT_ROOTFS) { 749 error = nfs_mountroot(mp, td); 750 goto out; 751 } 752 753 error = vfs_copyopt(mp->mnt_optnew, "nfs_args", &args, sizeof args); 754 if (error) 755 goto out; 756 757 if (args.version != NFS_ARGSVERSION) { 758 error = EPROGMISMATCH; 759 goto out; 760 } 761 if (mp->mnt_flag & MNT_UPDATE) { 762 struct nfsmount *nmp = VFSTONFS(mp); 763 764 if (nmp == NULL) { 765 error = EIO; 766 goto out; 767 } 768 /* 769 * When doing an update, we can't change from or to 770 * v3, switch lockd strategies or change cookie translation 771 */ 772 args.flags = (args.flags & 773 ~(NFSMNT_NFSV3 | NFSMNT_NOLOCKD /*|NFSMNT_XLATECOOKIE*/)) | 774 (nmp->nm_flag & 775 (NFSMNT_NFSV3 | NFSMNT_NOLOCKD /*|NFSMNT_XLATECOOKIE*/)); 776 nfs_decode_args(mp, nmp, &args, NULL); 777 goto out; 778 } 779 780 /* 781 * Make the nfs_ip_paranoia sysctl serve as the default connection 782 * or no-connection mode for those protocols that support 783 * no-connection mode (the flag will be cleared later for protocols 784 * that do not support no-connection mode). This will allow a client 785 * to receive replies from a different IP then the request was 786 * sent to. Note: default value for nfs_ip_paranoia is 1 (paranoid), 787 * not 0. 788 */ 789 if (nfs_ip_paranoia == 0) 790 args.flags |= NFSMNT_NOCONN; 791 if (args.fhsize < 0 || args.fhsize > NFSX_V3FHMAX) { 792 error = EINVAL; 793 goto out; 794 } 795 error = copyin((caddr_t)args.fh, (caddr_t)nfh, args.fhsize); 796 if (error) 797 goto out; 798 error = copyinstr(args.hostname, hst, MNAMELEN-1, &len); 799 if (error) 800 goto out; 801 bzero(&hst[len], MNAMELEN - len); 802 /* sockargs() call must be after above copyin() calls */ 803 error = getsockaddr(&nam, (caddr_t)args.addr, args.addrlen); 804 if (error) 805 goto out; 806 args.fh = nfh; 807 error = mountnfs(&args, mp, nam, hst, &vp, td->td_ucred); 808 out: 809 if (!error) { 810 MNT_ILOCK(mp); 811 mp->mnt_kern_flag |= (MNTK_MPSAFE|MNTK_LOOKUP_SHARED); 812 MNT_IUNLOCK(mp); 813 } 814 return (error); 815 } 816 817 818 /* 819 * VFS Operations. 820 * 821 * mount system call 822 * It seems a bit dumb to copyinstr() the host and path here and then 823 * bcopy() them in mountnfs(), but I wanted to detect errors before 824 * doing the sockargs() call because sockargs() allocates an mbuf and 825 * an error after that means that I have to release the mbuf. 826 */ 827 /* ARGSUSED */ 828 static int 829 nfs_cmount(struct mntarg *ma, void *data, int flags, struct thread *td) 830 { 831 int error; 832 struct nfs_args args; 833 834 error = copyin(data, &args, sizeof (struct nfs_args)); 835 if (error) 836 return error; 837 838 ma = mount_arg(ma, "nfs_args", &args, sizeof args); 839 840 error = kernel_mount(ma, flags); 841 return (error); 842 } 843 844 /* 845 * Common code for mount and mountroot 846 */ 847 static int 848 mountnfs(struct nfs_args *argp, struct mount *mp, struct sockaddr *nam, 849 char *hst, struct vnode **vpp, struct ucred *cred) 850 { 851 struct nfsmount *nmp; 852 struct nfsnode *np; 853 int error; 854 struct vattr attrs; 855 856 if (mp->mnt_flag & MNT_UPDATE) { 857 nmp = VFSTONFS(mp); 858 /* update paths, file handles, etc, here XXX */ 859 FREE(nam, M_SONAME); 860 return (0); 861 } else { 862 nmp = uma_zalloc(nfsmount_zone, M_WAITOK); 863 bzero((caddr_t)nmp, sizeof (struct nfsmount)); 864 TAILQ_INIT(&nmp->nm_bufq); 865 mp->mnt_data = (qaddr_t)nmp; 866 } 867 vfs_getnewfsid(mp); 868 nmp->nm_mountp = mp; 869 mtx_init(&nmp->nm_mtx, "NFSmount lock", NULL, MTX_DEF); 870 871 /* 872 * V2 can only handle 32 bit filesizes. A 4GB-1 limit may be too 873 * high, depending on whether we end up with negative offsets in 874 * the client or server somewhere. 2GB-1 may be safer. 875 * 876 * For V3, nfs_fsinfo will adjust this as necessary. Assume maximum 877 * that we can handle until we find out otherwise. 878 * XXX Our "safe" limit on the client is what we can store in our 879 * buffer cache using signed(!) block numbers. 880 */ 881 if ((argp->flags & NFSMNT_NFSV3) == 0) 882 nmp->nm_maxfilesize = 0xffffffffLL; 883 else 884 nmp->nm_maxfilesize = (u_int64_t)0x80000000 * DEV_BSIZE - 1; 885 886 nmp->nm_timeo = NFS_TIMEO; 887 nmp->nm_retry = NFS_RETRANS; 888 if ((argp->flags & NFSMNT_NFSV3) && argp->sotype == SOCK_STREAM) { 889 nmp->nm_wsize = nmp->nm_rsize = NFS_MAXDATA; 890 } else { 891 nmp->nm_wsize = NFS_WSIZE; 892 nmp->nm_rsize = NFS_RSIZE; 893 } 894 nmp->nm_wcommitsize = hibufspace / (desiredvnodes / 1000); 895 nmp->nm_readdirsize = NFS_READDIRSIZE; 896 nmp->nm_numgrps = NFS_MAXGRPS; 897 nmp->nm_readahead = NFS_DEFRAHEAD; 898 nmp->nm_deadthresh = NFS_MAXDEADTHRESH; 899 nmp->nm_tprintf_delay = nfs_tprintf_delay; 900 if (nmp->nm_tprintf_delay < 0) 901 nmp->nm_tprintf_delay = 0; 902 nmp->nm_tprintf_initial_delay = nfs_tprintf_initial_delay; 903 if (nmp->nm_tprintf_initial_delay < 0) 904 nmp->nm_tprintf_initial_delay = 0; 905 nmp->nm_fhsize = argp->fhsize; 906 bcopy((caddr_t)argp->fh, (caddr_t)nmp->nm_fh, argp->fhsize); 907 bcopy(hst, mp->mnt_stat.f_mntfromname, MNAMELEN); 908 nmp->nm_nam = nam; 909 /* Set up the sockets and per-host congestion */ 910 nmp->nm_sotype = argp->sotype; 911 nmp->nm_soproto = argp->proto; 912 nmp->nm_rpcops = &nfs_rpcops; 913 914 nfs_decode_args(mp, nmp, argp, hst); 915 916 /* 917 * For Connection based sockets (TCP,...) defer the connect until 918 * the first request, in case the server is not responding. 919 */ 920 if (nmp->nm_sotype == SOCK_DGRAM && 921 (error = nfs_connect(nmp, NULL))) 922 goto bad; 923 924 /* 925 * This is silly, but it has to be set so that vinifod() works. 926 * We do not want to do an nfs_statfs() here since we can get 927 * stuck on a dead server and we are holding a lock on the mount 928 * point. 929 */ 930 mtx_lock(&nmp->nm_mtx); 931 mp->mnt_stat.f_iosize = nfs_iosize(nmp); 932 mtx_unlock(&nmp->nm_mtx); 933 /* 934 * A reference count is needed on the nfsnode representing the 935 * remote root. If this object is not persistent, then backward 936 * traversals of the mount point (i.e. "..") will not work if 937 * the nfsnode gets flushed out of the cache. Ufs does not have 938 * this problem, because one can identify root inodes by their 939 * number == ROOTINO (2). 940 */ 941 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np, LK_EXCLUSIVE); 942 if (error) 943 goto bad; 944 *vpp = NFSTOV(np); 945 946 /* 947 * Get file attributes and transfer parameters for the 948 * mountpoint. This has the side effect of filling in 949 * (*vpp)->v_type with the correct value. 950 */ 951 if (argp->flags & NFSMNT_NFSV3) 952 nfs_fsinfo(nmp, *vpp, curthread->td_ucred, curthread); 953 else 954 VOP_GETATTR(*vpp, &attrs, curthread->td_ucred, curthread); 955 956 /* 957 * Lose the lock but keep the ref. 958 */ 959 VOP_UNLOCK(*vpp, 0, curthread); 960 961 return (0); 962 bad: 963 nfs_disconnect(nmp); 964 mtx_destroy(&nmp->nm_mtx); 965 uma_zfree(nfsmount_zone, nmp); 966 FREE(nam, M_SONAME); 967 return (error); 968 } 969 970 /* 971 * unmount system call 972 */ 973 static int 974 nfs_unmount(struct mount *mp, int mntflags, struct thread *td) 975 { 976 struct nfsmount *nmp; 977 int error, flags = 0; 978 979 if (mntflags & MNT_FORCE) 980 flags |= FORCECLOSE; 981 nmp = VFSTONFS(mp); 982 /* 983 * Goes something like this.. 984 * - Call vflush() to clear out vnodes for this filesystem 985 * - Close the socket 986 * - Free up the data structures 987 */ 988 /* In the forced case, cancel any outstanding requests. */ 989 if (flags & FORCECLOSE) { 990 error = nfs_nmcancelreqs(nmp); 991 if (error) 992 goto out; 993 } 994 /* We hold 1 extra ref on the root vnode; see comment in mountnfs(). */ 995 error = vflush(mp, 1, flags, td); 996 if (error) 997 goto out; 998 999 /* 1000 * We are now committed to the unmount. 1001 */ 1002 nfs_disconnect(nmp); 1003 FREE(nmp->nm_nam, M_SONAME); 1004 1005 mtx_destroy(&nmp->nm_mtx); 1006 uma_zfree(nfsmount_zone, nmp); 1007 out: 1008 return (error); 1009 } 1010 1011 /* 1012 * Return root of a filesystem 1013 */ 1014 static int 1015 nfs_root(struct mount *mp, int flags, struct vnode **vpp, struct thread *td) 1016 { 1017 struct vnode *vp; 1018 struct nfsmount *nmp; 1019 struct nfsnode *np; 1020 int error; 1021 1022 nmp = VFSTONFS(mp); 1023 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np, flags); 1024 if (error) 1025 return error; 1026 vp = NFSTOV(np); 1027 /* 1028 * Get transfer parameters and attributes for root vnode once. 1029 */ 1030 mtx_lock(&nmp->nm_mtx); 1031 if ((nmp->nm_state & NFSSTA_GOTFSINFO) == 0 && 1032 (nmp->nm_flag & NFSMNT_NFSV3)) { 1033 mtx_unlock(&nmp->nm_mtx); 1034 nfs_fsinfo(nmp, vp, curthread->td_ucred, curthread); 1035 } else 1036 mtx_unlock(&nmp->nm_mtx); 1037 if (vp->v_type == VNON) 1038 vp->v_type = VDIR; 1039 vp->v_vflag |= VV_ROOT; 1040 *vpp = vp; 1041 return (0); 1042 } 1043 1044 /* 1045 * Flush out the buffer cache 1046 */ 1047 /* ARGSUSED */ 1048 static int 1049 nfs_sync(struct mount *mp, int waitfor, struct thread *td) 1050 { 1051 struct vnode *vp, *mvp; 1052 int error, allerror = 0; 1053 1054 /* 1055 * Force stale buffer cache information to be flushed. 1056 */ 1057 MNT_ILOCK(mp); 1058 loop: 1059 MNT_VNODE_FOREACH(vp, mp, mvp) { 1060 VI_LOCK(vp); 1061 MNT_IUNLOCK(mp); 1062 if (VOP_ISLOCKED(vp, NULL) || 1063 vp->v_bufobj.bo_dirty.bv_cnt == 0 || 1064 waitfor == MNT_LAZY) { 1065 VI_UNLOCK(vp); 1066 MNT_ILOCK(mp); 1067 continue; 1068 } 1069 if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK, td)) { 1070 MNT_ILOCK(mp); 1071 MNT_VNODE_FOREACH_ABORT_ILOCKED(mp, mvp); 1072 goto loop; 1073 } 1074 error = VOP_FSYNC(vp, waitfor, td); 1075 if (error) 1076 allerror = error; 1077 VOP_UNLOCK(vp, 0, td); 1078 vrele(vp); 1079 1080 MNT_ILOCK(mp); 1081 } 1082 MNT_IUNLOCK(mp); 1083 return (allerror); 1084 } 1085 1086 static int 1087 nfs_sysctl(struct mount *mp, fsctlop_t op, struct sysctl_req *req) 1088 { 1089 struct nfsmount *nmp = VFSTONFS(mp); 1090 struct vfsquery vq; 1091 int error; 1092 1093 bzero(&vq, sizeof(vq)); 1094 switch (op) { 1095 #if 0 1096 case VFS_CTL_NOLOCKS: 1097 val = (nmp->nm_flag & NFSMNT_NOLOCKS) ? 1 : 0; 1098 if (req->oldptr != NULL) { 1099 error = SYSCTL_OUT(req, &val, sizeof(val)); 1100 if (error) 1101 return (error); 1102 } 1103 if (req->newptr != NULL) { 1104 error = SYSCTL_IN(req, &val, sizeof(val)); 1105 if (error) 1106 return (error); 1107 if (val) 1108 nmp->nm_flag |= NFSMNT_NOLOCKS; 1109 else 1110 nmp->nm_flag &= ~NFSMNT_NOLOCKS; 1111 } 1112 break; 1113 #endif 1114 case VFS_CTL_QUERY: 1115 mtx_lock(&nmp->nm_mtx); 1116 if (nmp->nm_state & NFSSTA_TIMEO) 1117 vq.vq_flags |= VQ_NOTRESP; 1118 mtx_unlock(&nmp->nm_mtx); 1119 #if 0 1120 if (!(nmp->nm_flag & NFSMNT_NOLOCKS) && 1121 (nmp->nm_state & NFSSTA_LOCKTIMEO)) 1122 vq.vq_flags |= VQ_NOTRESPLOCK; 1123 #endif 1124 error = SYSCTL_OUT(req, &vq, sizeof(vq)); 1125 break; 1126 case VFS_CTL_TIMEO: 1127 if (req->oldptr != NULL) { 1128 error = SYSCTL_OUT(req, &nmp->nm_tprintf_initial_delay, 1129 sizeof(nmp->nm_tprintf_initial_delay)); 1130 if (error) 1131 return (error); 1132 } 1133 if (req->newptr != NULL) { 1134 error = vfs_suser(mp, req->td); 1135 if (error) 1136 return (error); 1137 error = SYSCTL_IN(req, &nmp->nm_tprintf_initial_delay, 1138 sizeof(nmp->nm_tprintf_initial_delay)); 1139 if (error) 1140 return (error); 1141 if (nmp->nm_tprintf_initial_delay < 0) 1142 nmp->nm_tprintf_initial_delay = 0; 1143 } 1144 break; 1145 default: 1146 return (ENOTSUP); 1147 } 1148 return (0); 1149 }
Cache object: b03622f4e05437cce2512debcec887de
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]