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 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#)nfs_vfsops.c 8.12 (Berkeley) 5/20/95 37 * $FreeBSD: src/sys/nfs/nfs_vfsops.c,v 1.91.2.7 2003/01/27 20:04:08 dillon Exp $ 38 */ 39 40 #include "opt_bootp.h" 41 #include "opt_nfsroot.h" 42 43 #include <sys/param.h> 44 #include <sys/sockio.h> 45 #include <sys/proc.h> 46 #include <sys/vnode.h> 47 #include <sys/fcntl.h> 48 #include <sys/kernel.h> 49 #include <sys/sysctl.h> 50 #include <sys/malloc.h> 51 #include <sys/mount.h> 52 #include <sys/mbuf.h> 53 #include <sys/socket.h> 54 #include <sys/socketvar.h> 55 #include <sys/systm.h> 56 #include <sys/objcache.h> 57 58 #include <vm/vm.h> 59 #include <vm/vm_extern.h> 60 61 #include <net/if.h> 62 #include <net/route.h> 63 #include <netinet/in.h> 64 65 #include <sys/thread2.h> 66 #include <sys/mutex2.h> 67 68 #include "rpcv2.h" 69 #include "nfsproto.h" 70 #include "nfs.h" 71 #include "nfsmount.h" 72 #include "nfsnode.h" 73 #include "xdr_subs.h" 74 #include "nfsm_subs.h" 75 #include "nfsdiskless.h" 76 #include "nfsmountrpc.h" 77 78 extern int nfs_mountroot(struct mount *mp); 79 extern void bootpc_init(void); 80 81 extern struct vop_ops nfsv2_vnode_vops; 82 extern struct vop_ops nfsv2_fifo_vops; 83 extern struct vop_ops nfsv2_spec_vops; 84 85 MALLOC_DEFINE(M_NFSREQ, "NFS req", "NFS request header"); 86 MALLOC_DEFINE(M_NFSBIGFH, "NFSV3 bigfh", "NFS version 3 file handle"); 87 MALLOC_DEFINE(M_NFSD, "NFS daemon", "Nfs server daemon structure"); 88 MALLOC_DEFINE(M_NFSDIROFF, "NFSV3 diroff", "NFS directory offset data"); 89 MALLOC_DEFINE(M_NFSRVDESC, "NFSV3 srvdesc", "NFS server socket descriptor"); 90 MALLOC_DEFINE(M_NFSUID, "NFS uid", "Nfs uid mapping structure"); 91 MALLOC_DEFINE(M_NFSHASH, "NFS hash", "NFS hash tables"); 92 93 struct objcache *nfsmount_objcache; 94 95 struct nfsstats nfsstats; 96 SYSCTL_NODE(_vfs, OID_AUTO, nfs, CTLFLAG_RW, 0, "NFS filesystem"); 97 SYSCTL_STRUCT(_vfs_nfs, NFS_NFSSTATS, nfsstats, CTLFLAG_RD, &nfsstats, nfsstats, 98 "Nfs stats structure"); 99 static int nfs_ip_paranoia = 1; 100 SYSCTL_INT(_vfs_nfs, OID_AUTO, nfs_ip_paranoia, CTLFLAG_RW, &nfs_ip_paranoia, 0, 101 "Enable no-connection mode for protocols that support no-connection mode"); 102 #ifdef NFS_DEBUG 103 int nfs_debug; 104 SYSCTL_INT(_vfs_nfs, OID_AUTO, debug, CTLFLAG_RW, &nfs_debug, 0, ""); 105 #endif 106 107 /* 108 * Tunable to determine the Read/Write unit size. Maximum value 109 * is NFS_MAXDATA. We also default to NFS_MAXDATA. 110 */ 111 static int nfs_io_size = NFS_MAXDATA; 112 SYSCTL_INT(_vfs_nfs, OID_AUTO, nfs_io_size, CTLFLAG_RW, 113 &nfs_io_size, 0, "NFS optimal I/O unit size"); 114 115 static void nfs_decode_args (struct nfsmount *nmp, 116 struct nfs_args *argp); 117 static int mountnfs (struct nfs_args *,struct mount *, 118 struct sockaddr *,char *,char *,struct vnode **); 119 static int nfs_mount ( struct mount *mp, char *path, caddr_t data, 120 struct ucred *cred); 121 static int nfs_unmount ( struct mount *mp, int mntflags); 122 static int nfs_root ( struct mount *mp, struct vnode **vpp); 123 static int nfs_statfs ( struct mount *mp, struct statfs *sbp, 124 struct ucred *cred); 125 static int nfs_statvfs(struct mount *mp, struct statvfs *sbp, 126 struct ucred *cred); 127 static int nfs_sync ( struct mount *mp, int waitfor); 128 129 /* 130 * nfs vfs operations. 131 */ 132 static struct vfsops nfs_vfsops = { 133 .vfs_mount = nfs_mount, 134 .vfs_unmount = nfs_unmount, 135 .vfs_root = nfs_root, 136 .vfs_statfs = nfs_statfs, 137 .vfs_statvfs = nfs_statvfs, 138 .vfs_sync = nfs_sync, 139 .vfs_init = nfs_init, 140 .vfs_uninit = nfs_uninit 141 }; 142 VFS_SET(nfs_vfsops, nfs, VFCF_NETWORK); 143 MODULE_VERSION(nfs, 1); 144 145 /* 146 * This structure must be filled in by a primary bootstrap or bootstrap 147 * server for a diskless/dataless machine. It is initialized below just 148 * to ensure that it is allocated to initialized data (.data not .bss). 149 */ 150 struct nfs_diskless nfs_diskless = { { { 0 } } }; 151 struct nfsv3_diskless nfsv3_diskless = { { { 0 } } }; 152 int nfs_diskless_valid = 0; 153 154 SYSCTL_INT(_vfs_nfs, OID_AUTO, diskless_valid, CTLFLAG_RD, 155 &nfs_diskless_valid, 0, 156 "NFS diskless params were obtained"); 157 158 SYSCTL_STRING(_vfs_nfs, OID_AUTO, diskless_rootpath, CTLFLAG_RD, 159 nfsv3_diskless.root_hostnam, 0, 160 "Host name for mount point"); 161 162 SYSCTL_OPAQUE(_vfs_nfs, OID_AUTO, diskless_rootaddr, CTLFLAG_RD, 163 &nfsv3_diskless.root_saddr, sizeof nfsv3_diskless.root_saddr, 164 "%Ssockaddr_in", "Address of root server"); 165 166 SYSCTL_STRING(_vfs_nfs, OID_AUTO, diskless_swappath, CTLFLAG_RD, 167 nfsv3_diskless.swap_hostnam, 0, 168 "Host name for mount ppoint"); 169 170 SYSCTL_OPAQUE(_vfs_nfs, OID_AUTO, diskless_swapaddr, CTLFLAG_RD, 171 &nfsv3_diskless.swap_saddr, sizeof nfsv3_diskless.swap_saddr, 172 "%Ssockaddr_in", "Address of swap server"); 173 174 175 void nfsargs_ntoh (struct nfs_args *); 176 static int nfs_mountdiskless (char *, char *, int, 177 struct sockaddr_in *, struct nfs_args *, 178 struct thread *, struct vnode **, 179 struct mount **); 180 static void nfs_convert_diskless (void); 181 static void nfs_convert_oargs (struct nfs_args *args, 182 struct onfs_args *oargs); 183 184 /* 185 * Calculate the buffer I/O block size to use. The maximum V2 block size 186 * is typically 8K, the maximum datagram size is typically 16K, and the 187 * maximum V3 block size is typically 32K. The buffer cache tends to work 188 * best with 16K blocks but we allow 32K for TCP connections. 189 * 190 * We force the block size to be at least a page for buffer cache efficiency. 191 */ 192 static int 193 nfs_iosize(int v3, int sotype) 194 { 195 int iosize; 196 int iomax; 197 198 if (v3) { 199 if (sotype == SOCK_STREAM) 200 iomax = NFS_MAXDATA; 201 else 202 iomax = NFS_MAXDGRAMDATA; 203 } else { 204 iomax = NFS_V2MAXDATA; 205 } 206 if ((iosize = nfs_io_size) > iomax) 207 iosize = iomax; 208 if (iosize < PAGE_SIZE) 209 iosize = PAGE_SIZE; 210 211 /* 212 * This is an aweful hack but until the buffer cache is rewritten 213 * we need it. The problem is that when you combine write() with 214 * mmap() the vm_page->valid bits can become weird looking 215 * (e.g. 0xfc). This occurs because NFS uses piecemeal buffers 216 * at the file EOF. To solve the problem the BIO system needs to 217 * be guarenteed that the NFS iosize for regular files will be a 218 * multiple of PAGE_SIZE so it can invalidate the whole page 219 * rather then just the piece of it owned by the buffer when 220 * NFS does vinvalbuf() calls. 221 */ 222 if (iosize & PAGE_MASK) 223 iosize = (iosize & ~PAGE_MASK) + PAGE_SIZE; 224 return iosize; 225 } 226 227 static void 228 nfs_convert_oargs(struct nfs_args *args, struct onfs_args *oargs) 229 { 230 args->version = NFS_ARGSVERSION; 231 args->addr = oargs->addr; 232 args->addrlen = oargs->addrlen; 233 args->sotype = oargs->sotype; 234 args->proto = oargs->proto; 235 args->fh = oargs->fh; 236 args->fhsize = oargs->fhsize; 237 args->flags = oargs->flags; 238 args->wsize = oargs->wsize; 239 args->rsize = oargs->rsize; 240 args->readdirsize = oargs->readdirsize; 241 args->timeo = oargs->timeo; 242 args->retrans = oargs->retrans; 243 args->maxgrouplist = oargs->maxgrouplist; 244 args->readahead = oargs->readahead; 245 args->deadthresh = oargs->deadthresh; 246 args->hostname = oargs->hostname; 247 } 248 249 static void 250 nfs_convert_diskless(void) 251 { 252 int i; 253 254 bcopy(&nfs_diskless.myif, &nfsv3_diskless.myif, 255 sizeof(struct ifaliasreq)); 256 bcopy(&nfs_diskless.mygateway, &nfsv3_diskless.mygateway, 257 sizeof(struct sockaddr_in)); 258 nfs_convert_oargs(&nfsv3_diskless.swap_args, &nfs_diskless.swap_args); 259 260 /* 261 * Copy the NFS handle passed from the diskless code. 262 * 263 * XXX CURRENTLY DISABLED - bootp passes us a NFSv2 handle which 264 * will fail utterly with HAMMER due to limitations with NFSv2 265 * directory cookies. 266 */ 267 bcopy(nfs_diskless.swap_fh, nfsv3_diskless.swap_fh, NFSX_V2FH); 268 nfsv3_diskless.swap_fhsize = NFSX_V2FH; 269 for (i = NFSX_V2FH - 1; i >= 0; --i) { 270 if (nfs_diskless.swap_fh[i]) 271 break; 272 } 273 if (i < 0) 274 nfsv3_diskless.swap_fhsize = 0; 275 nfsv3_diskless.swap_fhsize = 0; /* FORCE DISABLE */ 276 277 bcopy(&nfs_diskless.swap_saddr,&nfsv3_diskless.swap_saddr, 278 sizeof(struct sockaddr_in)); 279 bcopy(nfs_diskless.swap_hostnam,nfsv3_diskless.swap_hostnam, MNAMELEN); 280 nfsv3_diskless.swap_nblks = nfs_diskless.swap_nblks; 281 bcopy(&nfs_diskless.swap_ucred, &nfsv3_diskless.swap_ucred, 282 sizeof(struct ucred)); 283 nfs_convert_oargs(&nfsv3_diskless.root_args, &nfs_diskless.root_args); 284 285 /* 286 * Copy the NFS handle passed from the diskless code. 287 * 288 * XXX CURRENTLY DISABLED - bootp passes us a NFSv2 handle which 289 * will fail utterly with HAMMER due to limitations with NFSv2 290 * directory cookies. 291 */ 292 bcopy(nfs_diskless.root_fh, nfsv3_diskless.root_fh, NFSX_V2FH); 293 nfsv3_diskless.root_fhsize = NFSX_V2FH; 294 for (i = NFSX_V2FH - 1; i >= 0; --i) { 295 if (nfs_diskless.root_fh[i]) 296 break; 297 } 298 if (i < 0) 299 nfsv3_diskless.root_fhsize = 0; 300 nfsv3_diskless.root_fhsize = 0; /* FORCE DISABLE */ 301 302 bcopy(&nfs_diskless.root_saddr,&nfsv3_diskless.root_saddr, 303 sizeof(struct sockaddr_in)); 304 bcopy(nfs_diskless.root_hostnam,nfsv3_diskless.root_hostnam, MNAMELEN); 305 nfsv3_diskless.root_time = nfs_diskless.root_time; 306 bcopy(nfs_diskless.my_hostnam,nfsv3_diskless.my_hostnam, 307 MAXHOSTNAMELEN); 308 nfs_diskless_valid = 3; 309 } 310 311 /* 312 * nfs statfs call 313 */ 314 int 315 nfs_statfs(struct mount *mp, struct statfs *sbp, struct ucred *cred) 316 { 317 struct vnode *vp; 318 struct nfs_statfs *sfp; 319 struct nfsmount *nmp = VFSTONFS(mp); 320 thread_t td = curthread; 321 int error = 0, retattr; 322 struct nfsnode *np; 323 u_quad_t tquad; 324 struct nfsm_info info; 325 326 info.mrep = NULL; 327 info.v3 = (nmp->nm_flag & NFSMNT_NFSV3); 328 329 lwkt_gettoken(&nmp->nm_token); 330 331 #ifndef nolint 332 sfp = NULL; 333 #endif 334 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np); 335 if (error) { 336 lwkt_reltoken(&nmp->nm_token); 337 return (error); 338 } 339 vp = NFSTOV(np); 340 /* ignore the passed cred */ 341 cred = crget(); 342 cred->cr_ngroups = 1; 343 if (info.v3 && (nmp->nm_state & NFSSTA_GOTFSINFO) == 0) 344 (void)nfs_fsinfo(nmp, vp, td); 345 nfsstats.rpccnt[NFSPROC_FSSTAT]++; 346 nfsm_reqhead(&info, vp, NFSPROC_FSSTAT, NFSX_FH(info.v3)); 347 ERROROUT(nfsm_fhtom(&info, vp)); 348 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_FSSTAT, td, cred, &error)); 349 if (info.v3) { 350 ERROROUT(nfsm_postop_attr(&info, vp, &retattr, 351 NFS_LATTR_NOSHRINK)); 352 } 353 if (error) { 354 if (info.mrep != NULL) 355 m_freem(info.mrep); 356 goto nfsmout; 357 } 358 NULLOUT(sfp = nfsm_dissect(&info, NFSX_STATFS(info.v3))); 359 sbp->f_flags = nmp->nm_flag; 360 361 if (info.v3) { 362 sbp->f_bsize = NFS_FABLKSIZE; 363 tquad = fxdr_hyper(&sfp->sf_tbytes); 364 sbp->f_blocks = (long)(tquad / ((u_quad_t)NFS_FABLKSIZE)); 365 tquad = fxdr_hyper(&sfp->sf_fbytes); 366 sbp->f_bfree = (long)(tquad / ((u_quad_t)NFS_FABLKSIZE)); 367 tquad = fxdr_hyper(&sfp->sf_abytes); 368 sbp->f_bavail = (long)(tquad / ((u_quad_t)NFS_FABLKSIZE)); 369 sbp->f_files = (fxdr_unsigned(int32_t, 370 sfp->sf_tfiles.nfsuquad[1]) & 0x7fffffff); 371 sbp->f_ffree = (fxdr_unsigned(int32_t, 372 sfp->sf_ffiles.nfsuquad[1]) & 0x7fffffff); 373 } else { 374 sbp->f_bsize = fxdr_unsigned(int32_t, sfp->sf_bsize); 375 sbp->f_blocks = fxdr_unsigned(int32_t, sfp->sf_blocks); 376 sbp->f_bfree = fxdr_unsigned(int32_t, sfp->sf_bfree); 377 sbp->f_bavail = fxdr_unsigned(int32_t, sfp->sf_bavail); 378 sbp->f_files = 0; 379 sbp->f_ffree = 0; 380 } 381 382 /* 383 * Some values are pre-set in mnt_stat. Note in particular f_iosize 384 * cannot be changed once the filesystem is mounted as it is used 385 * as the basis for BIOs. 386 */ 387 if (sbp != &mp->mnt_stat) { 388 sbp->f_type = mp->mnt_vfc->vfc_typenum; 389 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); 390 sbp->f_iosize = mp->mnt_stat.f_iosize; 391 } 392 m_freem(info.mrep); 393 info.mrep = NULL; 394 nfsmout: 395 vput(vp); 396 crfree(cred); 397 lwkt_reltoken(&nmp->nm_token); 398 return (error); 399 } 400 401 static int 402 nfs_statvfs(struct mount *mp, struct statvfs *sbp, struct ucred *cred) 403 { 404 struct vnode *vp; 405 struct nfs_statfs *sfp; 406 struct nfsmount *nmp = VFSTONFS(mp); 407 thread_t td = curthread; 408 int error = 0, retattr; 409 struct nfsnode *np; 410 struct nfsm_info info; 411 412 info.mrep = NULL; 413 info.v3 = (nmp->nm_flag & NFSMNT_NFSV3); 414 lwkt_gettoken(&nmp->nm_token); 415 416 #ifndef nolint 417 sfp = NULL; 418 #endif 419 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np); 420 if (error) { 421 lwkt_reltoken(&nmp->nm_token); 422 return (error); 423 } 424 vp = NFSTOV(np); 425 /* ignore the passed cred */ 426 cred = crget(); 427 cred->cr_ngroups = 1; 428 if (info.v3 && (nmp->nm_state & NFSSTA_GOTFSINFO) == 0) 429 (void)nfs_fsinfo(nmp, vp, td); 430 nfsstats.rpccnt[NFSPROC_FSSTAT]++; 431 nfsm_reqhead(&info, vp, NFSPROC_FSSTAT, NFSX_FH(info.v3)); 432 ERROROUT(nfsm_fhtom(&info, vp)); 433 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_FSSTAT, td, cred, &error)); 434 if (info.v3) { 435 ERROROUT(nfsm_postop_attr(&info, vp, &retattr, 436 NFS_LATTR_NOSHRINK)); 437 } 438 if (error) { 439 if (info.mrep != NULL) 440 m_freem(info.mrep); 441 goto nfsmout; 442 } 443 NULLOUT(sfp = nfsm_dissect(&info, NFSX_STATFS(info.v3))); 444 sbp->f_flag = nmp->nm_flag; 445 sbp->f_owner = nmp->nm_cred->cr_ruid; 446 447 if (info.v3) { 448 sbp->f_bsize = NFS_FABLKSIZE; 449 sbp->f_frsize = NFS_FABLKSIZE; 450 sbp->f_blocks = (fxdr_hyper(&sfp->sf_tbytes) / 451 ((u_quad_t)NFS_FABLKSIZE)); 452 sbp->f_bfree = (fxdr_hyper(&sfp->sf_fbytes) / 453 ((u_quad_t)NFS_FABLKSIZE)); 454 sbp->f_bavail = (fxdr_hyper(&sfp->sf_abytes) / 455 ((u_quad_t)NFS_FABLKSIZE)); 456 sbp->f_files = fxdr_hyper(&sfp->sf_tfiles); 457 sbp->f_ffree = fxdr_hyper(&sfp->sf_ffiles); 458 sbp->f_favail = fxdr_hyper(&sfp->sf_afiles); 459 } else { 460 sbp->f_bsize = fxdr_unsigned(int32_t, sfp->sf_bsize); 461 sbp->f_blocks = fxdr_unsigned(int32_t, sfp->sf_blocks); 462 sbp->f_bfree = fxdr_unsigned(int32_t, sfp->sf_bfree); 463 sbp->f_bavail = fxdr_unsigned(int32_t, sfp->sf_bavail); 464 sbp->f_files = 0; 465 sbp->f_ffree = 0; 466 sbp->f_favail = 0; 467 } 468 sbp->f_syncreads = 0; 469 sbp->f_syncwrites = 0; 470 sbp->f_asyncreads = 0; 471 sbp->f_asyncwrites = 0; 472 sbp->f_type = mp->mnt_vfc->vfc_typenum; 473 474 m_freem(info.mrep); 475 info.mrep = NULL; 476 nfsmout: 477 vput(vp); 478 crfree(cred); 479 lwkt_reltoken(&nmp->nm_token); 480 return (error); 481 } 482 483 /* 484 * nfs version 3 fsinfo rpc call 485 */ 486 int 487 nfs_fsinfo(struct nfsmount *nmp, struct vnode *vp, struct thread *td) 488 { 489 struct nfsv3_fsinfo *fsp; 490 u_int32_t pref, max; 491 int error = 0, retattr; 492 u_int64_t maxfsize; 493 struct nfsm_info info; 494 495 info.v3 = 1; 496 nfsstats.rpccnt[NFSPROC_FSINFO]++; 497 nfsm_reqhead(&info, vp, NFSPROC_FSINFO, NFSX_FH(1)); 498 ERROROUT(nfsm_fhtom(&info, vp)); 499 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_FSINFO, td, 500 nfs_vpcred(vp, ND_READ), &error)); 501 ERROROUT(nfsm_postop_attr(&info, vp, &retattr, NFS_LATTR_NOSHRINK)); 502 if (error == 0) { 503 NULLOUT(fsp = nfsm_dissect(&info, NFSX_V3FSINFO)); 504 pref = fxdr_unsigned(u_int32_t, fsp->fs_wtpref); 505 if (pref < nmp->nm_wsize && pref >= NFS_FABLKSIZE) 506 nmp->nm_wsize = (pref + NFS_FABLKSIZE - 1) & 507 ~(NFS_FABLKSIZE - 1); 508 max = fxdr_unsigned(u_int32_t, fsp->fs_wtmax); 509 if (max < nmp->nm_wsize && max > 0) { 510 nmp->nm_wsize = max & ~(NFS_FABLKSIZE - 1); 511 if (nmp->nm_wsize == 0) 512 nmp->nm_wsize = max; 513 } 514 pref = fxdr_unsigned(u_int32_t, fsp->fs_rtpref); 515 if (pref < nmp->nm_rsize && pref >= NFS_FABLKSIZE) 516 nmp->nm_rsize = (pref + NFS_FABLKSIZE - 1) & 517 ~(NFS_FABLKSIZE - 1); 518 max = fxdr_unsigned(u_int32_t, fsp->fs_rtmax); 519 if (max < nmp->nm_rsize && max > 0) { 520 nmp->nm_rsize = max & ~(NFS_FABLKSIZE - 1); 521 if (nmp->nm_rsize == 0) 522 nmp->nm_rsize = max; 523 } 524 pref = fxdr_unsigned(u_int32_t, fsp->fs_dtpref); 525 if (pref < nmp->nm_readdirsize && pref >= NFS_DIRBLKSIZ) 526 nmp->nm_readdirsize = (pref + NFS_DIRBLKSIZ - 1) & 527 ~(NFS_DIRBLKSIZ - 1); 528 if (max < nmp->nm_readdirsize && max > 0) { 529 nmp->nm_readdirsize = max & ~(NFS_DIRBLKSIZ - 1); 530 if (nmp->nm_readdirsize == 0) 531 nmp->nm_readdirsize = max; 532 } 533 maxfsize = fxdr_hyper(&fsp->fs_maxfilesize); 534 if (maxfsize > 0 && maxfsize < nmp->nm_maxfilesize) 535 nmp->nm_maxfilesize = maxfsize; 536 nmp->nm_state |= NFSSTA_GOTFSINFO; 537 538 /* 539 * Use the smaller of rsize/wsize for the biosize. 540 */ 541 if (nmp->nm_rsize < nmp->nm_wsize) 542 nmp->nm_mountp->mnt_stat.f_iosize = nmp->nm_rsize; 543 else 544 nmp->nm_mountp->mnt_stat.f_iosize = nmp->nm_wsize; 545 } 546 m_freem(info.mrep); 547 info.mrep = NULL; 548 nfsmout: 549 return (error); 550 } 551 552 /* 553 * Mount a remote root fs via. nfs. This depends on the info in the 554 * nfs_diskless structure that has been filled in properly by some primary 555 * bootstrap. 556 * It goes something like this: 557 * - do enough of "ifconfig" by calling ifioctl() so that the system 558 * can talk to the server 559 * - If nfs_diskless.mygateway is filled in, use that address as 560 * a default gateway. 561 * - build the rootfs mount point and call mountnfs() to do the rest. 562 */ 563 int 564 nfs_mountroot(struct mount *mp) 565 { 566 struct mount *swap_mp; 567 struct nfsv3_diskless *nd = &nfsv3_diskless; 568 struct socket *so; 569 struct vnode *vp; 570 struct thread *td = curthread; /* XXX */ 571 int error, i; 572 u_long l; 573 char buf[128]; 574 575 #if defined(BOOTP_NFSROOT) && defined(BOOTP) 576 bootpc_init(); /* use bootp to get nfs_diskless filled in */ 577 #endif 578 579 /* 580 * XXX time must be non-zero when we init the interface or else 581 * the arp code will wedge... 582 */ 583 while (mycpu->gd_time_seconds == 0) 584 tsleep(mycpu, 0, "arpkludge", 10); 585 586 /* 587 * The boot code may have passed us a diskless structure. 588 */ 589 kprintf("DISKLESS %d\n", nfs_diskless_valid); 590 if (nfs_diskless_valid == 1) 591 nfs_convert_diskless(); 592 593 /* 594 * NFSv3 is required. 595 */ 596 nd->root_args.flags |= NFSMNT_NFSV3 | NFSMNT_RDIRPLUS; 597 nd->swap_args.flags |= NFSMNT_NFSV3; 598 599 #define SINP(sockaddr) ((struct sockaddr_in *)(sockaddr)) 600 kprintf("nfs_mountroot: interface %s ip %s", 601 nd->myif.ifra_name, 602 inet_ntoa(SINP(&nd->myif.ifra_addr)->sin_addr)); 603 kprintf(" bcast %s", 604 inet_ntoa(SINP(&nd->myif.ifra_broadaddr)->sin_addr)); 605 kprintf(" mask %s\n", 606 inet_ntoa(SINP(&nd->myif.ifra_mask)->sin_addr)); 607 #undef SINP 608 609 /* 610 * XXX splnet, so networks will receive... 611 */ 612 crit_enter(); 613 614 /* 615 * BOOTP does not necessarily have to be compiled into the kernel 616 * for an NFS root to work. If we inherited the network 617 * configuration for PXEBOOT then pxe_setup_nfsdiskless() has figured 618 * out our interface for us and all we need to do is ifconfig the 619 * interface. We only do this if the interface has not already been 620 * ifconfig'd by e.g. BOOTP. 621 */ 622 error = socreate(nd->myif.ifra_addr.sa_family, &so, SOCK_DGRAM, 0, td); 623 if (error) { 624 panic("nfs_mountroot: socreate(%04x): %d", 625 nd->myif.ifra_addr.sa_family, error); 626 } 627 628 error = ifioctl(so, SIOCAIFADDR, (caddr_t)&nd->myif, proc0.p_ucred); 629 if (error) 630 panic("nfs_mountroot: SIOCAIFADDR: %d", error); 631 632 soclose(so, FNONBLOCK); 633 634 /* 635 * If the gateway field is filled in, set it as the default route. 636 */ 637 if (nd->mygateway.sin_len != 0) { 638 struct sockaddr_in mask, sin; 639 640 bzero((caddr_t)&mask, sizeof(mask)); 641 sin = mask; 642 sin.sin_family = AF_INET; 643 sin.sin_len = sizeof(sin); 644 kprintf("nfs_mountroot: gateway %s\n", 645 inet_ntoa(nd->mygateway.sin_addr)); 646 error = rtrequest_global(RTM_ADD, (struct sockaddr *)&sin, 647 (struct sockaddr *)&nd->mygateway, 648 (struct sockaddr *)&mask, 649 RTF_UP | RTF_GATEWAY); 650 if (error) 651 kprintf("nfs_mountroot: unable to set gateway, error %d, continuing anyway\n", error); 652 } 653 654 /* 655 * Create the rootfs mount point. 656 */ 657 nd->root_args.fh = nd->root_fh; 658 nd->root_args.fhsize = nd->root_fhsize; 659 l = ntohl(nd->root_saddr.sin_addr.s_addr); 660 ksnprintf(buf, sizeof(buf), "%ld.%ld.%ld.%ld:%s", 661 (l >> 24) & 0xff, (l >> 16) & 0xff, 662 (l >> 8) & 0xff, (l >> 0) & 0xff,nd->root_hostnam); 663 kprintf("NFS_ROOT: %s\n",buf); 664 error = nfs_mountdiskless(buf, "/", MNT_RDONLY, &nd->root_saddr, 665 &nd->root_args, td, &vp, &mp); 666 if (error) { 667 mp->mnt_vfc->vfc_refcount--; 668 crit_exit(); 669 return (error); 670 } 671 672 swap_mp = NULL; 673 if (nd->swap_nblks) { 674 675 /* Convert to DEV_BSIZE instead of Kilobyte */ 676 nd->swap_nblks *= 2; 677 678 /* 679 * Create a fake mount point just for the swap vnode so that the 680 * swap file can be on a different server from the rootfs. 681 */ 682 nd->swap_args.fh = nd->swap_fh; 683 nd->swap_args.fhsize = nd->swap_fhsize; 684 l = ntohl(nd->swap_saddr.sin_addr.s_addr); 685 ksnprintf(buf, sizeof(buf), "%ld.%ld.%ld.%ld:%s", 686 (l >> 24) & 0xff, (l >> 16) & 0xff, 687 (l >> 8) & 0xff, (l >> 0) & 0xff,nd->swap_hostnam); 688 kprintf("NFS SWAP: %s\n",buf); 689 error = nfs_mountdiskless(buf, "/swap", 0, &nd->swap_saddr, 690 &nd->swap_args, td, &vp, &swap_mp); 691 if (error) { 692 crit_exit(); 693 return (error); 694 } 695 vfs_unbusy(swap_mp); 696 697 VTONFS(vp)->n_size = VTONFS(vp)->n_vattr.va_size = 698 nd->swap_nblks * DEV_BSIZE ; 699 700 /* 701 * Since the swap file is not the root dir of a file system, 702 * hack it to a regular file. 703 */ 704 vclrflags(vp, VROOT); 705 vref(vp); 706 nfs_setvtype(vp, VREG); 707 swaponvp(td, vp, nd->swap_nblks); 708 } 709 710 mp->mnt_flag |= MNT_ROOTFS; 711 712 /* 713 * This is not really an nfs issue, but it is much easier to 714 * set hostname here and then let the "/etc/rc.xxx" files 715 * mount the right /var based upon its preset value. 716 */ 717 bcopy(nd->my_hostnam, hostname, MAXHOSTNAMELEN); 718 hostname[MAXHOSTNAMELEN - 1] = '\0'; 719 for (i = 0; i < MAXHOSTNAMELEN; i++) 720 if (hostname[i] == '\0') 721 break; 722 inittodr(ntohl(nd->root_time)); 723 crit_exit(); 724 return (0); 725 } 726 727 /* 728 * Internal version of mount system call for diskless setup. 729 */ 730 static int 731 nfs_mountdiskless(char *path, char *which, int mountflag, 732 struct sockaddr_in *sin, struct nfs_args *args, struct thread *td, 733 struct vnode **vpp, struct mount **mpp) 734 { 735 struct mount *mp; 736 struct sockaddr *nam; 737 int didalloc = 0; 738 int error; 739 740 mp = *mpp; 741 742 if (mp == NULL) { 743 if ((error = vfs_rootmountalloc("nfs", path, &mp)) != 0) { 744 kprintf("nfs_mountroot: NFS not configured"); 745 return (error); 746 } 747 didalloc = 1; 748 } 749 mp->mnt_kern_flag = 0; 750 mp->mnt_flag = mountflag; 751 nam = dup_sockaddr((struct sockaddr *)sin); 752 753 #if defined(BOOTP) || defined(NFS_ROOT) 754 if (args->fhsize == 0) { 755 char *xpath = path; 756 757 kprintf("NFS_ROOT: No FH passed from loader, attempting " 758 "mount rpc..."); 759 while (*xpath && *xpath != ':') 760 ++xpath; 761 if (*xpath) 762 ++xpath; 763 args->fhsize = 0; 764 error = md_mount(sin, xpath, args->fh, &args->fhsize, args, td); 765 if (error) { 766 kprintf("failed error %d.\n", error); 767 goto haderror; 768 } 769 kprintf("success!\n"); 770 } 771 #endif 772 773 if ((error = mountnfs(args, mp, nam, which, path, vpp)) != 0) { 774 #if defined(BOOTP) || defined(NFS_ROOT) 775 haderror: 776 #endif 777 kprintf("nfs_mountroot: mount %s on %s: %d", path, which, error); 778 mp->mnt_vfc->vfc_refcount--; 779 if (didalloc) 780 kfree(mp, M_MOUNT); 781 kfree(nam, M_SONAME); 782 return (error); 783 } 784 *mpp = mp; 785 return (0); 786 } 787 788 static void 789 nfs_decode_args(struct nfsmount *nmp, struct nfs_args *argp) 790 { 791 int adjsock; 792 int maxio; 793 794 crit_enter(); 795 /* 796 * Silently clear NFSMNT_NOCONN if it's a TCP mount, it makes 797 * no sense in that context. 798 */ 799 if (nmp->nm_sotype == SOCK_STREAM) { 800 nmp->nm_flag &= ~NFSMNT_NOCONN; 801 argp->flags &= ~NFSMNT_NOCONN; 802 } 803 804 /* 805 * readdirplus is NFSv3 only. 806 */ 807 if ((argp->flags & NFSMNT_NFSV3) == 0) { 808 nmp->nm_flag &= ~NFSMNT_RDIRPLUS; 809 argp->flags &= ~NFSMNT_RDIRPLUS; 810 } 811 812 /* 813 * Re-bind if rsrvd port flag has changed 814 */ 815 adjsock = (nmp->nm_flag & NFSMNT_RESVPORT) != 816 (argp->flags & NFSMNT_RESVPORT); 817 818 /* Update flags atomically. Don't change the lock bits. */ 819 nmp->nm_flag = argp->flags | nmp->nm_flag; 820 crit_exit(); 821 822 if ((argp->flags & NFSMNT_TIMEO) && argp->timeo > 0) { 823 nmp->nm_timeo = (argp->timeo * NFS_HZ + 5) / 10; 824 if (nmp->nm_timeo < NFS_MINTIMEO) 825 nmp->nm_timeo = NFS_MINTIMEO; 826 else if (nmp->nm_timeo > NFS_MAXTIMEO) 827 nmp->nm_timeo = NFS_MAXTIMEO; 828 } 829 830 if ((argp->flags & NFSMNT_RETRANS) && argp->retrans > 1) { 831 nmp->nm_retry = argp->retrans; 832 if (nmp->nm_retry > NFS_MAXREXMIT) 833 nmp->nm_retry = NFS_MAXREXMIT; 834 } 835 836 /* 837 * These parameters effect the buffer cache and cannot be changed 838 * once we've successfully mounted. 839 */ 840 if ((nmp->nm_state & NFSSTA_GOTFSINFO) == 0) { 841 maxio = nfs_iosize(argp->flags & NFSMNT_NFSV3, nmp->nm_sotype); 842 843 if ((argp->flags & NFSMNT_WSIZE) && argp->wsize > 0) { 844 nmp->nm_wsize = argp->wsize; 845 /* Round down to multiple of blocksize */ 846 nmp->nm_wsize &= ~(NFS_FABLKSIZE - 1); 847 if (nmp->nm_wsize <= 0) 848 nmp->nm_wsize = NFS_FABLKSIZE; 849 } 850 if (nmp->nm_wsize > maxio) 851 nmp->nm_wsize = maxio; 852 if (nmp->nm_wsize > MAXBSIZE) 853 nmp->nm_wsize = MAXBSIZE; 854 855 if ((argp->flags & NFSMNT_RSIZE) && argp->rsize > 0) { 856 nmp->nm_rsize = argp->rsize; 857 /* Round down to multiple of blocksize */ 858 nmp->nm_rsize &= ~(NFS_FABLKSIZE - 1); 859 if (nmp->nm_rsize <= 0) 860 nmp->nm_rsize = NFS_FABLKSIZE; 861 } 862 if (nmp->nm_rsize > maxio) 863 nmp->nm_rsize = maxio; 864 if (nmp->nm_rsize > MAXBSIZE) 865 nmp->nm_rsize = MAXBSIZE; 866 867 if ((argp->flags & NFSMNT_READDIRSIZE) && 868 argp->readdirsize > 0) { 869 nmp->nm_readdirsize = argp->readdirsize; 870 } 871 if (nmp->nm_readdirsize > maxio) 872 nmp->nm_readdirsize = maxio; 873 if (nmp->nm_readdirsize > nmp->nm_rsize) 874 nmp->nm_readdirsize = nmp->nm_rsize; 875 } 876 877 if ((argp->flags & NFSMNT_ACREGMIN) && argp->acregmin >= 0) 878 nmp->nm_acregmin = argp->acregmin; 879 else 880 nmp->nm_acregmin = NFS_MINATTRTIMO; 881 if ((argp->flags & NFSMNT_ACREGMAX) && argp->acregmax >= 0) 882 nmp->nm_acregmax = argp->acregmax; 883 else 884 nmp->nm_acregmax = NFS_MAXATTRTIMO; 885 if ((argp->flags & NFSMNT_ACDIRMIN) && argp->acdirmin >= 0) 886 nmp->nm_acdirmin = argp->acdirmin; 887 else 888 nmp->nm_acdirmin = NFS_MINDIRATTRTIMO; 889 if ((argp->flags & NFSMNT_ACDIRMAX) && argp->acdirmax >= 0) 890 nmp->nm_acdirmax = argp->acdirmax; 891 else 892 nmp->nm_acdirmax = NFS_MAXDIRATTRTIMO; 893 if (nmp->nm_acdirmin > nmp->nm_acdirmax) 894 nmp->nm_acdirmin = nmp->nm_acdirmax; 895 if (nmp->nm_acregmin > nmp->nm_acregmax) 896 nmp->nm_acregmin = nmp->nm_acregmax; 897 898 if ((argp->flags & NFSMNT_MAXGRPS) && argp->maxgrouplist >= 0) { 899 if (argp->maxgrouplist <= NFS_MAXGRPS) 900 nmp->nm_numgrps = argp->maxgrouplist; 901 else 902 nmp->nm_numgrps = NFS_MAXGRPS; 903 } 904 if ((argp->flags & NFSMNT_READAHEAD) && argp->readahead >= 0) { 905 if (argp->readahead <= NFS_MAXRAHEAD) 906 nmp->nm_readahead = argp->readahead; 907 else 908 nmp->nm_readahead = NFS_MAXRAHEAD; 909 } 910 if ((argp->flags & NFSMNT_DEADTHRESH) && argp->deadthresh >= 1) { 911 if (argp->deadthresh <= NFS_NEVERDEAD) 912 nmp->nm_deadthresh = argp->deadthresh; 913 else 914 nmp->nm_deadthresh = NFS_NEVERDEAD; 915 } 916 917 if (nmp->nm_so && adjsock) { 918 nfs_safedisconnect(nmp); 919 if (nmp->nm_sotype == SOCK_DGRAM) 920 while (nfs_connect(nmp, NULL)) { 921 kprintf("nfs_args: retrying connect\n"); 922 (void) tsleep((caddr_t)&lbolt, 0, "nfscon", 0); 923 } 924 } 925 } 926 927 /* 928 * VFS Operations. 929 * 930 * mount system call 931 * It seems a bit dumb to copyinstr() the host and path here and then 932 * bcopy() them in mountnfs(), but I wanted to detect errors before 933 * doing the sockargs() call because sockargs() allocates an mbuf and 934 * an error after that means that I have to release the mbuf. 935 */ 936 /* ARGSUSED */ 937 static int 938 nfs_mount(struct mount *mp, char *path, caddr_t data, struct ucred *cred) 939 { 940 int error; 941 struct nfs_args args; 942 struct sockaddr *nam; 943 struct vnode *vp; 944 char pth[MNAMELEN], hst[MNAMELEN]; 945 size_t len; 946 u_char nfh[NFSX_V3FHMAX]; 947 948 if (path == NULL) { 949 nfs_mountroot(mp); 950 return (0); 951 } 952 error = copyin(data, (caddr_t)&args, sizeof (struct nfs_args)); 953 if (error) 954 return (error); 955 if (args.version != NFS_ARGSVERSION) { 956 #ifdef COMPAT_PRELITE2 957 /* 958 * If the argument version is unknown, then assume the 959 * caller is a pre-lite2 4.4BSD client and convert its 960 * arguments. 961 */ 962 struct onfs_args oargs; 963 error = copyin(data, (caddr_t)&oargs, sizeof (struct onfs_args)); 964 if (error) 965 return (error); 966 nfs_convert_oargs(&args,&oargs); 967 #else /* !COMPAT_PRELITE2 */ 968 return (EPROGMISMATCH); 969 #endif /* COMPAT_PRELITE2 */ 970 } 971 if (mp->mnt_flag & MNT_UPDATE) { 972 struct nfsmount *nmp = VFSTONFS(mp); 973 974 if (nmp == NULL) 975 return (EIO); 976 /* 977 * When doing an update, we can't change from or to 978 * v3, or change cookie translation, or rsize or wsize. 979 */ 980 args.flags &= ~(NFSMNT_NFSV3 | NFSMNT_RSIZE | NFSMNT_WSIZE); 981 args.flags |= nmp->nm_flag & (NFSMNT_NFSV3); 982 nfs_decode_args(nmp, &args); 983 return (0); 984 } 985 986 /* 987 * Make the nfs_ip_paranoia sysctl serve as the default connection 988 * or no-connection mode for those protocols that support 989 * no-connection mode (the flag will be cleared later for protocols 990 * that do not support no-connection mode). This will allow a client 991 * to receive replies from a different IP then the request was 992 * sent to. Note: default value for nfs_ip_paranoia is 1 (paranoid), 993 * not 0. 994 */ 995 if (nfs_ip_paranoia == 0) 996 args.flags |= NFSMNT_NOCONN; 997 if (args.fhsize < 0 || args.fhsize > NFSX_V3FHMAX) 998 return (EINVAL); 999 error = copyin((caddr_t)args.fh, (caddr_t)nfh, args.fhsize); 1000 if (error) 1001 return (error); 1002 error = copyinstr(path, pth, MNAMELEN-1, &len); 1003 if (error) 1004 return (error); 1005 bzero(&pth[len], MNAMELEN - len); 1006 error = copyinstr(args.hostname, hst, MNAMELEN-1, &len); 1007 if (error) 1008 return (error); 1009 bzero(&hst[len], MNAMELEN - len); 1010 /* sockargs() call must be after above copyin() calls */ 1011 error = getsockaddr(&nam, (caddr_t)args.addr, args.addrlen); 1012 if (error) 1013 return (error); 1014 args.fh = nfh; 1015 error = mountnfs(&args, mp, nam, pth, hst, &vp); 1016 return (error); 1017 } 1018 1019 /* 1020 * Common code for mount and mountroot 1021 */ 1022 static int 1023 mountnfs(struct nfs_args *argp, struct mount *mp, struct sockaddr *nam, 1024 char *pth, char *hst, struct vnode **vpp) 1025 { 1026 struct nfsmount *nmp; 1027 struct nfsnode *np; 1028 int error; 1029 int rxcpu; 1030 int txcpu; 1031 1032 if (mp->mnt_flag & MNT_UPDATE) { 1033 nmp = VFSTONFS(mp); 1034 /* update paths, file handles, etc, here XXX */ 1035 kfree(nam, M_SONAME); 1036 return (0); 1037 } else { 1038 nmp = objcache_get(nfsmount_objcache, M_WAITOK); 1039 bzero((caddr_t)nmp, sizeof (struct nfsmount)); 1040 mtx_init(&nmp->nm_rxlock); 1041 mtx_init(&nmp->nm_txlock); 1042 TAILQ_INIT(&nmp->nm_uidlruhead); 1043 TAILQ_INIT(&nmp->nm_bioq); 1044 TAILQ_INIT(&nmp->nm_reqq); 1045 TAILQ_INIT(&nmp->nm_reqtxq); 1046 TAILQ_INIT(&nmp->nm_reqrxq); 1047 mp->mnt_data = (qaddr_t)nmp; 1048 lwkt_token_init(&nmp->nm_token, "nfs_token"); 1049 } 1050 vfs_getnewfsid(mp); 1051 nmp->nm_mountp = mp; 1052 mp->mnt_kern_flag |= MNTK_ALL_MPSAFE; 1053 mp->mnt_kern_flag |= MNTK_THR_SYNC; 1054 1055 lwkt_gettoken(&nmp->nm_token); 1056 1057 /* 1058 * V2 can only handle 32 bit filesizes. A 4GB-1 limit may be too 1059 * high, depending on whether we end up with negative offsets in 1060 * the client or server somewhere. 2GB-1 may be safer. 1061 * 1062 * For V3, nfs_fsinfo will adjust this as necessary. Assume maximum 1063 * that we can handle until we find out otherwise. Note that seek 1064 * offsets are signed. 1065 */ 1066 if ((argp->flags & NFSMNT_NFSV3) == 0) 1067 nmp->nm_maxfilesize = 0xffffffffLL; 1068 else 1069 nmp->nm_maxfilesize = 0x7fffffffffffffffLL; 1070 1071 nmp->nm_timeo = NFS_TIMEO; 1072 nmp->nm_retry = NFS_RETRANS; 1073 nmp->nm_wsize = nfs_iosize(argp->flags & NFSMNT_NFSV3, argp->sotype); 1074 nmp->nm_rsize = nmp->nm_wsize; 1075 nmp->nm_readdirsize = NFS_READDIRSIZE; 1076 nmp->nm_numgrps = NFS_MAXGRPS; 1077 nmp->nm_readahead = NFS_DEFRAHEAD; 1078 nmp->nm_deadthresh = NFS_DEADTHRESH; 1079 nmp->nm_fhsize = argp->fhsize; 1080 bcopy((caddr_t)argp->fh, (caddr_t)nmp->nm_fh, argp->fhsize); 1081 bcopy(hst, mp->mnt_stat.f_mntfromname, MNAMELEN); 1082 nmp->nm_nam = nam; 1083 /* Set up the sockets and per-host congestion */ 1084 nmp->nm_sotype = argp->sotype; 1085 nmp->nm_soproto = argp->proto; 1086 nmp->nm_cred = crhold(proc0.p_ucred); 1087 1088 nfs_decode_args(nmp, argp); 1089 1090 /* 1091 * For Connection based sockets (TCP,...) defer the connect until 1092 * the first request, in case the server is not responding. 1093 */ 1094 if (nmp->nm_sotype == SOCK_DGRAM && 1095 (error = nfs_connect(nmp, NULL))) 1096 goto bad; 1097 1098 /* 1099 * This is silly, but it has to be set so that vinifod() works. 1100 * We do not want to do an nfs_statfs() here since we can get 1101 * stuck on a dead server and we are holding a lock on the mount 1102 * point. 1103 */ 1104 mp->mnt_stat.f_iosize = 1105 nfs_iosize(nmp->nm_flag & NFSMNT_NFSV3, nmp->nm_sotype); 1106 1107 /* 1108 * Install vop_ops for our vnops 1109 */ 1110 vfs_add_vnodeops(mp, &nfsv2_vnode_vops, &mp->mnt_vn_norm_ops); 1111 vfs_add_vnodeops(mp, &nfsv2_spec_vops, &mp->mnt_vn_spec_ops); 1112 vfs_add_vnodeops(mp, &nfsv2_fifo_vops, &mp->mnt_vn_fifo_ops); 1113 1114 /* 1115 * A reference count is needed on the nfsnode representing the 1116 * remote root. If this object is not persistent, then backward 1117 * traversals of the mount point (i.e. "..") will not work if 1118 * the nfsnode gets flushed out of the cache. Ufs does not have 1119 * this problem, because one can identify root inodes by their 1120 * number == ROOTINO (2). 1121 */ 1122 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np); 1123 if (error) 1124 goto bad; 1125 *vpp = NFSTOV(np); 1126 1127 /* 1128 * Retrieval of mountpoint attributes is delayed until nfs_rot 1129 * or nfs_statfs are first called. This will happen either when 1130 * we first traverse the mount point or if somebody does a df(1). 1131 * 1132 * NFSSTA_GOTFSINFO is used to flag if we have successfully 1133 * retrieved mountpoint attributes. In the case of NFSv3 we 1134 * also flag static fsinfo. 1135 */ 1136 if (*vpp != NULL) 1137 (*vpp)->v_type = VNON; 1138 1139 /* 1140 * Lose the lock but keep the ref. 1141 */ 1142 vn_unlock(*vpp); 1143 lwkt_gettoken(&nfs_token); 1144 TAILQ_INSERT_TAIL(&nfs_mountq, nmp, nm_entry); 1145 lwkt_reltoken(&nfs_token); 1146 1147 #ifdef SMP 1148 switch(ncpus) { 1149 case 0: 1150 case 1: 1151 rxcpu = 0; 1152 txcpu = 0; 1153 break; 1154 case 2: 1155 rxcpu = 0; 1156 txcpu = 1; 1157 break; 1158 default: 1159 rxcpu = -1; 1160 txcpu = -1; 1161 break; 1162 } 1163 #else 1164 rxcpu = 0; 1165 txcpu = 0; 1166 #endif 1167 1168 /* 1169 * Start the reader and writer threads. 1170 */ 1171 lwkt_create(nfssvc_iod_reader, nmp, &nmp->nm_rxthread, 1172 NULL, 0, rxcpu, "nfsiod_rx"); 1173 lwkt_create(nfssvc_iod_writer, nmp, &nmp->nm_txthread, 1174 NULL, 0, txcpu, "nfsiod_tx"); 1175 lwkt_reltoken(&nmp->nm_token); 1176 return (0); 1177 bad: 1178 nfs_disconnect(nmp); 1179 lwkt_reltoken(&nmp->nm_token); 1180 nfs_free_mount(nmp); 1181 return (error); 1182 } 1183 1184 /* 1185 * unmount system call 1186 */ 1187 static int 1188 nfs_unmount(struct mount *mp, int mntflags) 1189 { 1190 struct nfsmount *nmp; 1191 int error, flags = 0; 1192 1193 nmp = VFSTONFS(mp); 1194 lwkt_gettoken(&nmp->nm_token); 1195 if (mntflags & MNT_FORCE) { 1196 flags |= FORCECLOSE; 1197 nmp->nm_flag |= NFSMNT_FORCE; 1198 } 1199 1200 /* 1201 * Goes something like this.. 1202 * - Call vflush() to clear out vnodes for this file system 1203 * - Close the socket 1204 * - Free up the data structures 1205 */ 1206 /* In the forced case, cancel any outstanding requests. */ 1207 if (flags & FORCECLOSE) { 1208 error = nfs_nmcancelreqs(nmp); 1209 if (error) { 1210 kprintf("NFS: %s: Unable to cancel all requests\n", 1211 mp->mnt_stat.f_mntfromname); 1212 /* continue anyway */ 1213 } 1214 } 1215 1216 /* 1217 * Must handshake with nfs_clientd() if it is active. XXX 1218 */ 1219 nmp->nm_state |= NFSSTA_DISMINPROG; 1220 1221 /* 1222 * We hold 1 extra ref on the root vnode; see comment in mountnfs(). 1223 * 1224 * If this doesn't work and we are doing a forced unmount we continue 1225 * anyway. 1226 */ 1227 error = vflush(mp, 1, flags); 1228 if (error) { 1229 nmp->nm_state &= ~NFSSTA_DISMINPROG; 1230 if ((flags & FORCECLOSE) == 0) { 1231 lwkt_reltoken(&nmp->nm_token); 1232 return (error); 1233 } 1234 } 1235 1236 /* 1237 * We are now committed to the unmount. 1238 * For NQNFS, let the server daemon free the nfsmount structure. 1239 */ 1240 if (nmp->nm_flag & NFSMNT_KERB) 1241 nmp->nm_state |= NFSSTA_DISMNT; 1242 nfssvc_iod_stop1(nmp); 1243 nfs_disconnect(nmp); 1244 nfssvc_iod_stop2(nmp); 1245 1246 lwkt_gettoken(&nfs_token); 1247 TAILQ_REMOVE(&nfs_mountq, nmp, nm_entry); 1248 lwkt_reltoken(&nfs_token); 1249 1250 lwkt_reltoken(&nmp->nm_token); 1251 1252 if ((nmp->nm_flag & NFSMNT_KERB) == 0) { 1253 nfs_free_mount(nmp); 1254 } 1255 return (0); 1256 } 1257 1258 void 1259 nfs_free_mount(struct nfsmount *nmp) 1260 { 1261 if (nmp->nm_cred) { 1262 crfree(nmp->nm_cred); 1263 nmp->nm_cred = NULL; 1264 } 1265 if (nmp->nm_nam) { 1266 kfree(nmp->nm_nam, M_SONAME); 1267 nmp->nm_nam = NULL; 1268 } 1269 objcache_put(nfsmount_objcache, nmp); 1270 } 1271 1272 /* 1273 * Return root of a filesystem 1274 */ 1275 static int 1276 nfs_root(struct mount *mp, struct vnode **vpp) 1277 { 1278 struct vnode *vp; 1279 struct nfsmount *nmp; 1280 struct vattr attrs; 1281 struct nfsnode *np; 1282 int error; 1283 1284 nmp = VFSTONFS(mp); 1285 lwkt_gettoken(&nmp->nm_token); 1286 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np); 1287 if (error) { 1288 lwkt_reltoken(&nmp->nm_token); 1289 return (error); 1290 } 1291 vp = NFSTOV(np); 1292 1293 /* 1294 * Get transfer parameters and root vnode attributes 1295 * 1296 * NOTE: nfs_fsinfo() is expected to override the default 1297 * f_iosize we set. 1298 */ 1299 if ((nmp->nm_state & NFSSTA_GOTFSINFO) == 0) { 1300 if (nmp->nm_flag & NFSMNT_NFSV3) { 1301 mp->mnt_stat.f_iosize = nfs_iosize(1, nmp->nm_sotype); 1302 error = nfs_fsinfo(nmp, vp, curthread); 1303 } else { 1304 if ((error = VOP_GETATTR(vp, &attrs)) == 0) 1305 nmp->nm_state |= NFSSTA_GOTFSINFO; 1306 1307 } 1308 } else { 1309 /* 1310 * The root vnode is usually cached by the namecache so do not 1311 * try to avoid going over the wire even if we have previous 1312 * information cached. A stale NFS mount can loop 1313 * forever resolving the root vnode if we return no-error when 1314 * there is in fact an error. 1315 */ 1316 np->n_attrstamp = 0; 1317 error = VOP_GETATTR(vp, &attrs); 1318 } 1319 if (vp->v_type == VNON) 1320 nfs_setvtype(vp, VDIR); 1321 vsetflags(vp, VROOT); 1322 if (error) 1323 vput(vp); 1324 else 1325 *vpp = vp; 1326 lwkt_reltoken(&nmp->nm_token); 1327 return (error); 1328 } 1329 1330 struct scaninfo { 1331 int rescan; 1332 int waitfor; 1333 int allerror; 1334 }; 1335 1336 static int nfs_sync_scan1(struct mount *mp, struct vnode *vp, void *data); 1337 static int nfs_sync_scan2(struct mount *mp, struct vnode *vp, void *data); 1338 1339 /* 1340 * Flush out the buffer cache 1341 */ 1342 /* ARGSUSED */ 1343 static int 1344 nfs_sync(struct mount *mp, int waitfor) 1345 { 1346 struct nfsmount *nmp = VFSTONFS(mp); 1347 struct scaninfo scaninfo; 1348 int error; 1349 1350 scaninfo.rescan = 1; 1351 scaninfo.waitfor = waitfor; 1352 scaninfo.allerror = 0; 1353 1354 /* 1355 * Force stale buffer cache information to be flushed. 1356 */ 1357 lwkt_gettoken(&nmp->nm_token); 1358 error = 0; 1359 while (error == 0 && scaninfo.rescan) { 1360 scaninfo.rescan = 0; 1361 error = vmntvnodescan(mp, VMSC_GETVP, nfs_sync_scan1, 1362 nfs_sync_scan2, &scaninfo); 1363 } 1364 lwkt_reltoken(&nmp->nm_token); 1365 return(error); 1366 } 1367 1368 static int 1369 nfs_sync_scan1(struct mount *mp, struct vnode *vp, void *data) 1370 { 1371 struct scaninfo *info = data; 1372 1373 if (vn_islocked(vp) || RB_EMPTY(&vp->v_rbdirty_tree)) 1374 return(-1); 1375 if (info->waitfor & MNT_LAZY) 1376 return(-1); 1377 return(0); 1378 } 1379 1380 static int 1381 nfs_sync_scan2(struct mount *mp, struct vnode *vp, void *data) 1382 { 1383 struct scaninfo *info = data; 1384 int error; 1385 1386 error = VOP_FSYNC(vp, info->waitfor, 0); 1387 if (error) 1388 info->allerror = error; 1389 return(0); 1390 } 1391 1392