1 /* $NetBSD: nfs_serv.c,v 1.165 2012/08/29 14:00:22 christos Exp $ */ 2 3 /* 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Rick Macklem at The University of Guelph. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)nfs_serv.c 8.8 (Berkeley) 7/31/95 35 */ 36 37 /* 38 * nfs version 2 and 3 server calls to vnode ops 39 * - these routines generally have 3 phases 40 * 1 - break down and validate rpc request in mbuf list 41 * 2 - do the vnode ops for the request 42 * (surprisingly ?? many are very similar to syscalls in vfs_syscalls.c) 43 * 3 - build the rpc reply in an mbuf list 44 * nb: 45 * - do not mix the phases, since the nfsm_?? macros can return failures 46 * on a bad rpc or similar and do not do any vrele() or vput()'s 47 * 48 * - the nfsm_reply() macro generates an nfs rpc reply with the nfs 49 * error number iff error != 0 whereas 50 * returning an error from the server function implies a fatal error 51 * such as a badly constructed rpc request that should be dropped without 52 * a reply. 53 * For Version 3, nfsm_reply() does not return for the error case, since 54 * most version 3 rpcs return more than the status for error cases. 55 */ 56 57 #include <sys/cdefs.h> 58 __KERNEL_RCSID(0, "$NetBSD: nfs_serv.c,v 1.165 2012/08/29 14:00:22 christos Exp $"); 59 60 #include <sys/param.h> 61 #include <sys/systm.h> 62 #include <sys/proc.h> 63 #include <sys/file.h> 64 #include <sys/namei.h> 65 #include <sys/vnode.h> 66 #include <sys/mount.h> 67 #include <sys/socket.h> 68 #include <sys/socketvar.h> 69 #include <sys/mbuf.h> 70 #include <sys/dirent.h> 71 #include <sys/stat.h> 72 #include <sys/kernel.h> 73 #include <sys/hash.h> 74 #include <sys/kauth.h> 75 #include <sys/module.h> 76 #include <sys/syscall.h> 77 #include <sys/syscallargs.h> 78 #include <sys/syscallvar.h> 79 80 #include <uvm/uvm.h> 81 82 #include <nfs/nfsproto.h> 83 #include <nfs/rpcv2.h> 84 #include <nfs/nfs.h> 85 #include <nfs/xdr_subs.h> 86 #include <nfs/nfsm_subs.h> 87 #include <nfs/nfs_var.h> 88 89 MODULE(MODULE_CLASS_MISC, nfsserver, "nfs"); 90 91 /* Global vars */ 92 extern u_int32_t nfs_xdrneg1; 93 extern u_int32_t nfs_false, nfs_true; 94 extern const enum vtype nv3tov_type[8]; 95 extern struct nfsstats nfsstats; 96 extern const nfstype nfsv2_type[9]; 97 extern const nfstype nfsv3_type[9]; 98 int nfsrvw_procrastinate = NFS_GATHERDELAY * 1000; 99 bool nfsd_use_loan = true; /* use page-loan for READ OP */ 100 101 #define nqsrv_getl(vp, rw) /* nothing */ 102 103 static const struct syscall_package nfsserver_syscalls[] = { 104 { SYS_nfssvc, 0, (sy_call_t *)sys_nfssvc }, 105 { 0, 0, NULL }, 106 }; 107 108 static int 109 nfsserver_modcmd(modcmd_t cmd, void *arg) 110 { 111 extern struct vfs_hooks nfs_export_hooks; /* XXX */ 112 int error; 113 114 switch (cmd) { 115 case MODULE_CMD_INIT: 116 error = syscall_establish(NULL, nfsserver_syscalls); 117 if (error != 0) { 118 return error; 119 } 120 nfs_init(); /* XXX for monolithic kernel */ 121 netexport_init(); 122 nfsrv_initcache(); /* Init the server request cache */ 123 nfsrv_init(0); /* Init server data structures */ 124 vfs_hooks_attach(&nfs_export_hooks); 125 nfs_timer_srvinit(nfsrv_timer); 126 return 0; 127 case MODULE_CMD_FINI: 128 error = syscall_disestablish(NULL, nfsserver_syscalls); 129 if (error != 0) { 130 return error; 131 } 132 /* 133 * Kill export list before detaching VFS hooks, so we 134 * we don't leak state due to a concurrent umount(). 135 */ 136 netexport_fini(); 137 vfs_hooks_detach(&nfs_export_hooks); 138 139 /* Kill timer before server goes away. */ 140 nfs_timer_srvfini(); 141 nfsrv_fini(); 142 143 /* Server uses server cache, so kill cache last. */ 144 nfsrv_finicache(); 145 nfs_fini(); 146 return 0; 147 default: 148 return ENOTTY; 149 } 150 } 151 152 /* 153 * nfs v3 access service 154 */ 155 int 156 nfsrv3_access(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 157 { 158 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 159 struct mbuf *nam = nfsd->nd_nam; 160 char *dpos = nfsd->nd_dpos; 161 kauth_cred_t cred = nfsd->nd_cr; 162 struct vnode *vp; 163 nfsrvfh_t nsfh; 164 u_int32_t *tl; 165 int32_t t1; 166 char *bpos; 167 int error = 0, rdonly, cache = 0, getret; 168 char *cp2; 169 struct mbuf *mb, *mreq; 170 struct vattr va; 171 u_long inmode, testmode, outmode; 172 u_quad_t frev; 173 174 nfsm_srvmtofh(&nsfh); 175 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 176 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, &rdonly, 177 (nfsd->nd_flag & ND_KERBAUTH), false); 178 if (error) { 179 nfsm_reply(NFSX_UNSIGNED); 180 nfsm_srvpostop_attr(1, (struct vattr *)0); 181 return (0); 182 } 183 inmode = fxdr_unsigned(u_int32_t, *tl); 184 outmode = 0; 185 if ((inmode & NFSV3ACCESS_READ) && 186 nfsrv_access(vp, VREAD, cred, rdonly, lwp, 0) == 0) 187 outmode |= NFSV3ACCESS_READ; 188 if (vp->v_type != VDIR) { 189 testmode = inmode & (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND); 190 if (testmode && 191 nfsrv_access(vp, VWRITE, cred, rdonly, lwp, 0) == 0) 192 outmode |= testmode; 193 if ((inmode & NFSV3ACCESS_EXECUTE) && 194 nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 0) == 0) 195 outmode |= NFSV3ACCESS_EXECUTE; 196 } else { 197 testmode = inmode & (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | 198 NFSV3ACCESS_DELETE); 199 if (testmode && 200 nfsrv_access(vp, VWRITE, cred, rdonly, lwp, 0) == 0) 201 outmode |= testmode; 202 if ((inmode & NFSV3ACCESS_LOOKUP) && 203 nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 0) == 0) 204 outmode |= NFSV3ACCESS_LOOKUP; 205 } 206 getret = VOP_GETATTR(vp, &va, cred); 207 vput(vp); 208 nfsm_reply(NFSX_POSTOPATTR(1) + NFSX_UNSIGNED); 209 nfsm_srvpostop_attr(getret, &va); 210 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 211 *tl = txdr_unsigned(outmode); 212 nfsm_srvdone; 213 } 214 215 /* 216 * nfs getattr service 217 */ 218 int 219 nfsrv_getattr(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 220 { 221 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 222 struct mbuf *nam = nfsd->nd_nam; 223 char *dpos = nfsd->nd_dpos; 224 kauth_cred_t cred = nfsd->nd_cr; 225 struct nfs_fattr *fp; 226 struct vattr va; 227 struct vnode *vp; 228 nfsrvfh_t nsfh; 229 u_int32_t *tl; 230 int32_t t1; 231 char *bpos; 232 int error = 0, rdonly, cache = 0; 233 char *cp2; 234 struct mbuf *mb, *mreq; 235 u_quad_t frev; 236 237 nfsm_srvmtofh(&nsfh); 238 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, &rdonly, 239 (nfsd->nd_flag & ND_KERBAUTH), false); 240 if (error) { 241 nfsm_reply(0); 242 return (0); 243 } 244 nqsrv_getl(vp, ND_READ); 245 error = VOP_GETATTR(vp, &va, cred); 246 vput(vp); 247 nfsm_reply(NFSX_FATTR(nfsd->nd_flag & ND_NFSV3)); 248 if (error) 249 return (0); 250 nfsm_build(fp, struct nfs_fattr *, NFSX_FATTR(nfsd->nd_flag & ND_NFSV3)); 251 nfsm_srvfillattr(&va, fp); 252 nfsm_srvdone; 253 } 254 255 /* 256 * nfs setattr service 257 */ 258 int 259 nfsrv_setattr(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 260 { 261 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 262 struct mbuf *nam = nfsd->nd_nam; 263 char *dpos = nfsd->nd_dpos; 264 kauth_cred_t cred = nfsd->nd_cr; 265 struct vattr va, preat; 266 struct nfsv2_sattr *sp; 267 struct nfs_fattr *fp; 268 struct vnode *vp; 269 nfsrvfh_t nsfh; 270 u_int32_t *tl; 271 int32_t t1; 272 char *bpos; 273 int error = 0, rdonly, cache = 0, preat_ret = 1, postat_ret = 1; 274 int v3 = (nfsd->nd_flag & ND_NFSV3), gcheck = 0; 275 char *cp2; 276 struct mbuf *mb, *mreq; 277 u_quad_t frev; 278 struct timespec guard; 279 280 memset(&guard, 0, sizeof guard); /* XXX gcc */ 281 282 nfsm_srvmtofh(&nsfh); 283 vattr_null(&va); 284 if (v3) { 285 nfsm_srvsattr(&va); 286 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 287 gcheck = fxdr_unsigned(int, *tl); 288 if (gcheck) { 289 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 290 fxdr_nfsv3time(tl, &guard); 291 } 292 } else { 293 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 294 /* 295 * Nah nah nah nah na nah 296 * There is a bug in the Sun client that puts 0xffff in the mode 297 * field of sattr when it should put in 0xffffffff. The u_short 298 * doesn't sign extend. 299 * --> check the low order 2 bytes for 0xffff 300 */ 301 if ((fxdr_unsigned(int, sp->sa_mode) & 0xffff) != 0xffff) 302 va.va_mode = nfstov_mode(sp->sa_mode); 303 if (sp->sa_uid != nfs_xdrneg1) 304 va.va_uid = fxdr_unsigned(uid_t, sp->sa_uid); 305 if (sp->sa_gid != nfs_xdrneg1) 306 va.va_gid = fxdr_unsigned(gid_t, sp->sa_gid); 307 if (sp->sa_size != nfs_xdrneg1) 308 va.va_size = fxdr_unsigned(u_quad_t, sp->sa_size); 309 if (sp->sa_atime.nfsv2_sec != nfs_xdrneg1) { 310 #ifdef notyet 311 fxdr_nfsv2time(&sp->sa_atime, &va.va_atime); 312 #else 313 va.va_atime.tv_sec = 314 fxdr_unsigned(u_int32_t,sp->sa_atime.nfsv2_sec); 315 va.va_atime.tv_nsec = 0; 316 #endif 317 } 318 if (sp->sa_mtime.nfsv2_sec != nfs_xdrneg1) 319 fxdr_nfsv2time(&sp->sa_mtime, &va.va_mtime); 320 321 } 322 323 /* 324 * Now that we have all the fields, lets do it. 325 */ 326 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, &rdonly, 327 (nfsd->nd_flag & ND_KERBAUTH), false); 328 if (error) { 329 nfsm_reply(2 * NFSX_UNSIGNED); 330 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 331 return (0); 332 } 333 nqsrv_getl(vp, ND_WRITE); 334 if (v3) { 335 error = preat_ret = VOP_GETATTR(vp, &preat, cred); 336 if (!error && gcheck && 337 (preat.va_ctime.tv_sec != guard.tv_sec || 338 preat.va_ctime.tv_nsec != guard.tv_nsec)) 339 error = NFSERR_NOT_SYNC; 340 if (error) { 341 vput(vp); 342 nfsm_reply(NFSX_WCCDATA(v3)); 343 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 344 return (0); 345 } 346 } 347 348 /* 349 * If the size is being changed write acces is required, otherwise 350 * just check for a read only file system. 351 */ 352 if (va.va_size == ((u_quad_t)((quad_t) -1))) { 353 if (rdonly || (vp->v_mount->mnt_flag & MNT_RDONLY)) { 354 error = EROFS; 355 goto out; 356 } 357 } else { 358 if (vp->v_type == VDIR) { 359 error = EISDIR; 360 goto out; 361 } else if ((error = nfsrv_access(vp, VWRITE, cred, rdonly, 362 lwp, 0)) != 0) 363 goto out; 364 } 365 error = VOP_SETATTR(vp, &va, cred); 366 postat_ret = VOP_GETATTR(vp, &va, cred); 367 if (!error) 368 error = postat_ret; 369 out: 370 vput(vp); 371 nfsm_reply(NFSX_WCCORFATTR(v3)); 372 if (v3) { 373 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 374 return (0); 375 } else { 376 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 377 nfsm_srvfillattr(&va, fp); 378 } 379 nfsm_srvdone; 380 } 381 382 /* 383 * nfs lookup rpc 384 */ 385 int 386 nfsrv_lookup(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 387 { 388 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 389 struct mbuf *nam = nfsd->nd_nam; 390 char *dpos = nfsd->nd_dpos; 391 kauth_cred_t cred = nfsd->nd_cr; 392 struct nfs_fattr *fp; 393 struct nameidata nd, ind, *ndp = &nd; 394 struct pathbuf *ipb = NULL; 395 struct vnode *vp, *dirp; 396 nfsrvfh_t nsfh; 397 char *cp; 398 u_int32_t *tl; 399 int32_t t1; 400 char *bpos; 401 int error = 0, cache = 0, dirattr_ret = 1; 402 uint32_t len; 403 int v3 = (nfsd->nd_flag & ND_NFSV3), pubflag; 404 char *cp2; 405 struct mbuf *mb, *mreq; 406 struct vattr va, dirattr; 407 u_quad_t frev; 408 409 nfsm_srvmtofh(&nsfh); 410 nfsm_srvnamesiz(len); 411 412 pubflag = nfs_ispublicfh(&nsfh); 413 414 nd.ni_cnd.cn_cred = cred; 415 nd.ni_cnd.cn_nameiop = LOOKUP; 416 nd.ni_cnd.cn_flags = LOCKLEAF; 417 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 418 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), pubflag); 419 420 if (!error && pubflag) { 421 if (nd.ni_vp->v_type == VDIR && nfs_pub.np_index != NULL && 422 (ipb = pathbuf_create(nfs_pub.np_index)) != NULL) { 423 /* 424 * Setup call to lookup() to see if we can find 425 * the index file. Arguably, this doesn't belong 426 * in a kernel.. Ugh. 427 */ 428 ind = nd; 429 VOP_UNLOCK(nd.ni_vp); 430 ind.ni_pathbuf = ipb; 431 432 error = lookup_for_nfsd_index(&ind, nd.ni_vp); 433 if (!error) { 434 /* 435 * Found an index file. Get rid of 436 * the old references. 437 */ 438 if (dirp) 439 vrele(dirp); 440 dirp = nd.ni_vp; 441 ndp = &ind; 442 } else 443 error = 0; 444 } 445 /* 446 * If the public filehandle was used, check that this lookup 447 * didn't result in a filehandle outside the publicly exported 448 * filesystem. 449 */ 450 451 if (!error && ndp->ni_vp->v_mount != nfs_pub.np_mount) { 452 vput(nd.ni_vp); 453 error = EPERM; 454 } 455 } 456 457 if (error) { 458 if (nd.ni_pathbuf != NULL) { 459 pathbuf_destroy(nd.ni_pathbuf); 460 } 461 if (ipb != NULL) { 462 pathbuf_destroy(ipb); 463 } 464 if (dirp) { 465 if (v3) { 466 vn_lock(dirp, LK_SHARED | LK_RETRY); 467 dirattr_ret = VOP_GETATTR(dirp, &dirattr, cred); 468 vput(dirp); 469 } else 470 vrele(dirp); 471 } 472 nfsm_reply(NFSX_POSTOPATTR(v3)); 473 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 474 return (0); 475 } 476 477 nqsrv_getl(ndp->ni_startdir, ND_READ); 478 pathbuf_destroy(nd.ni_pathbuf); 479 if (ipb != NULL) { 480 pathbuf_destroy(ipb); 481 } 482 vp = ndp->ni_vp; 483 error = nfsrv_composefh(vp, &nsfh, v3); 484 if (!error) 485 error = VOP_GETATTR(vp, &va, cred); 486 vput(vp); 487 if (dirp) { 488 if (v3) { 489 vn_lock(dirp, LK_SHARED | LK_RETRY); 490 dirattr_ret = VOP_GETATTR(dirp, &dirattr, cred); 491 vput(dirp); 492 } else 493 vrele(dirp); 494 } 495 nfsm_reply(NFSX_SRVFH(&nsfh, v3) + NFSX_POSTOPORFATTR(v3) + 496 NFSX_POSTOPATTR(v3)); 497 if (error) { 498 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 499 return (0); 500 } 501 nfsm_srvfhtom(&nsfh, v3); 502 if (v3) { 503 nfsm_srvpostop_attr(0, &va); 504 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 505 } else { 506 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 507 nfsm_srvfillattr(&va, fp); 508 } 509 nfsm_srvdone; 510 } 511 512 /* 513 * nfs readlink service 514 */ 515 int 516 nfsrv_readlink(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 517 { 518 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 519 struct mbuf *nam = nfsd->nd_nam; 520 char *dpos = nfsd->nd_dpos; 521 kauth_cred_t cred = nfsd->nd_cr; 522 struct iovec iv[(NFS_MAXPATHLEN+MLEN-1)/MLEN]; 523 struct iovec *ivp = iv; 524 struct mbuf *mp; 525 u_int32_t *tl; 526 int32_t t1; 527 char *bpos; 528 int error = 0, rdonly, cache = 0, i, padlen, getret; 529 uint32_t len; 530 int v3 = (nfsd->nd_flag & ND_NFSV3); 531 char *cp2; 532 struct mbuf *mb, *mp2 = NULL, *mp3 = NULL, *mreq; 533 struct vnode *vp; 534 struct vattr attr; 535 nfsrvfh_t nsfh; 536 struct uio io, *uiop = &io; 537 u_quad_t frev; 538 539 nfsm_srvmtofh(&nsfh); 540 len = 0; 541 i = 0; 542 while (len < NFS_MAXPATHLEN) { 543 mp = m_get(M_WAIT, MT_DATA); 544 MCLAIM(mp, &nfs_mowner); 545 m_clget(mp, M_WAIT); 546 mp->m_len = NFSMSIZ(mp); 547 if (len == 0) 548 mp3 = mp2 = mp; 549 else { 550 mp2->m_next = mp; 551 mp2 = mp; 552 } 553 if ((len+mp->m_len) > NFS_MAXPATHLEN) { 554 mp->m_len = NFS_MAXPATHLEN-len; 555 len = NFS_MAXPATHLEN; 556 } else 557 len += mp->m_len; 558 ivp->iov_base = mtod(mp, void *); 559 ivp->iov_len = mp->m_len; 560 i++; 561 ivp++; 562 } 563 uiop->uio_iov = iv; 564 uiop->uio_iovcnt = i; 565 uiop->uio_offset = 0; 566 uiop->uio_resid = len; 567 uiop->uio_rw = UIO_READ; 568 UIO_SETUP_SYSSPACE(uiop); 569 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 570 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 571 if (error) { 572 m_freem(mp3); 573 nfsm_reply(2 * NFSX_UNSIGNED); 574 nfsm_srvpostop_attr(1, (struct vattr *)0); 575 return (0); 576 } 577 if (vp->v_type != VLNK) { 578 if (v3) 579 error = EINVAL; 580 else 581 error = ENXIO; 582 goto out; 583 } 584 nqsrv_getl(vp, ND_READ); 585 error = VOP_READLINK(vp, uiop, cred); 586 out: 587 getret = VOP_GETATTR(vp, &attr, cred); 588 vput(vp); 589 if (error) 590 m_freem(mp3); 591 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_UNSIGNED); 592 if (v3) { 593 nfsm_srvpostop_attr(getret, &attr); 594 if (error) 595 return (0); 596 } 597 len -= uiop->uio_resid; 598 padlen = nfsm_padlen(len); 599 if (uiop->uio_resid || padlen) 600 nfs_zeropad(mp3, uiop->uio_resid, padlen); 601 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 602 *tl = txdr_unsigned(len); 603 mb->m_next = mp3; 604 nfsm_srvdone; 605 } 606 607 /* 608 * nfs read service 609 */ 610 int 611 nfsrv_read(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 612 { 613 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 614 struct mbuf *nam = nfsd->nd_nam; 615 char *dpos = nfsd->nd_dpos; 616 kauth_cred_t cred = nfsd->nd_cr; 617 struct mbuf *m; 618 struct nfs_fattr *fp; 619 u_int32_t *tl; 620 int32_t t1; 621 int i; 622 char *bpos; 623 int error = 0, rdonly, cache = 0, getret; 624 int v3 = (nfsd->nd_flag & ND_NFSV3); 625 uint32_t reqlen, len, cnt, left; 626 int padlen; 627 char *cp2; 628 struct mbuf *mb, *mreq; 629 struct vnode *vp; 630 nfsrvfh_t nsfh; 631 struct uio io, *uiop = &io; 632 struct vattr va; 633 off_t off; 634 u_quad_t frev; 635 636 nfsm_srvmtofh(&nsfh); 637 if (v3) { 638 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 639 off = fxdr_hyper(tl); 640 } else { 641 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 642 off = (off_t)fxdr_unsigned(u_int32_t, *tl); 643 } 644 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 645 reqlen = fxdr_unsigned(uint32_t, *tl); 646 reqlen = MIN(reqlen, NFS_SRVMAXDATA(nfsd)); 647 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 648 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 649 if (error) { 650 nfsm_reply(2 * NFSX_UNSIGNED); 651 nfsm_srvpostop_attr(1, (struct vattr *)0); 652 return (0); 653 } 654 if (vp->v_type != VREG) { 655 if (v3) 656 error = EINVAL; 657 else 658 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 659 } 660 if (!error) { 661 nqsrv_getl(vp, ND_READ); 662 if ((error = nfsrv_access(vp, VREAD, cred, rdonly, lwp, 1)) != 0) 663 error = nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 1); 664 } 665 getret = VOP_GETATTR(vp, &va, cred); 666 if (!error) 667 error = getret; 668 if (error) { 669 vput(vp); 670 nfsm_reply(NFSX_POSTOPATTR(v3)); 671 nfsm_srvpostop_attr(getret, &va); 672 return (0); 673 } 674 if (off >= va.va_size) 675 cnt = 0; 676 else if ((off + reqlen) > va.va_size) 677 cnt = va.va_size - off; 678 else 679 cnt = reqlen; 680 nfsm_reply(NFSX_POSTOPORFATTR(v3) + 3 * NFSX_UNSIGNED+nfsm_rndup(cnt)); 681 if (v3) { 682 nfsm_build(tl, u_int32_t *, NFSX_V3FATTR + 4 * NFSX_UNSIGNED); 683 *tl++ = nfs_true; 684 fp = (struct nfs_fattr *)tl; 685 tl += (NFSX_V3FATTR / sizeof (u_int32_t)); 686 } else { 687 nfsm_build(tl, u_int32_t *, NFSX_V2FATTR + NFSX_UNSIGNED); 688 fp = (struct nfs_fattr *)tl; 689 tl += (NFSX_V2FATTR / sizeof (u_int32_t)); 690 } 691 len = left = cnt; 692 if (cnt > 0) { 693 if (nfsd_use_loan) { 694 struct vm_page **pgpp; 695 voff_t pgoff = trunc_page(off); 696 int npages; 697 vaddr_t lva; 698 699 npages = (round_page(off + cnt) - pgoff) >> PAGE_SHIFT; 700 KASSERT(npages <= M_EXT_MAXPAGES); /* XXX */ 701 702 /* allocate kva for mbuf data */ 703 lva = sokvaalloc(pgoff, npages << PAGE_SHIFT, 704 slp->ns_so); 705 if (lva == 0) { 706 /* fall back to VOP_READ */ 707 goto loan_fail; 708 } 709 710 /* allocate mbuf */ 711 m = m_get(M_WAIT, MT_DATA); 712 MCLAIM(m, &nfs_mowner); 713 pgpp = m->m_ext.ext_pgs; 714 715 /* loan pages */ 716 error = uvm_loanuobjpages(&vp->v_uobj, pgoff, npages, 717 pgpp); 718 if (error) { 719 sokvafree(lva, npages << PAGE_SHIFT); 720 m_free(m); 721 if (error == EBUSY) 722 goto loan_fail; 723 goto read_error; 724 } 725 726 /* associate kva to mbuf */ 727 MEXTADD(m, (void *)(lva + ((vaddr_t)off & PAGE_MASK)), 728 cnt, M_MBUF, soloanfree, slp->ns_so); 729 m->m_flags |= M_EXT_PAGES | M_EXT_ROMAP; 730 m->m_len = cnt; 731 732 /* map pages */ 733 for (i = 0; i < npages; i++) { 734 pmap_kenter_pa(lva, VM_PAGE_TO_PHYS(pgpp[i]), 735 VM_PROT_READ, 0); 736 lva += PAGE_SIZE; 737 } 738 739 pmap_update(pmap_kernel()); 740 741 mb->m_next = m; 742 mb = m; 743 error = 0; 744 uiop->uio_resid = 0; 745 } else { 746 struct iovec *iv; 747 struct iovec *iv2; 748 struct mbuf *m2; 749 int siz; 750 loan_fail: 751 /* 752 * Generate the mbuf list with the uio_iov ref. to it. 753 */ 754 i = 0; 755 m = m2 = mb; 756 while (left > 0) { 757 siz = min(M_TRAILINGSPACE(m), left); 758 if (siz > 0) { 759 left -= siz; 760 i++; 761 } 762 if (left > 0) { 763 m = m_get(M_WAIT, MT_DATA); 764 MCLAIM(m, &nfs_mowner); 765 m_clget(m, M_WAIT); 766 m->m_len = 0; 767 m2->m_next = m; 768 m2 = m; 769 } 770 } 771 iv = malloc(i * sizeof(struct iovec), M_TEMP, M_WAITOK); 772 uiop->uio_iov = iv2 = iv; 773 m = mb; 774 left = cnt; 775 i = 0; 776 while (left > 0) { 777 if (m == NULL) 778 panic("nfsrv_read iov"); 779 siz = min(M_TRAILINGSPACE(m), left); 780 if (siz > 0) { 781 iv->iov_base = mtod(m, char *) + 782 m->m_len; 783 iv->iov_len = siz; 784 m->m_len += siz; 785 left -= siz; 786 iv++; 787 i++; 788 } 789 m = m->m_next; 790 } 791 uiop->uio_iovcnt = i; 792 uiop->uio_offset = off; 793 uiop->uio_resid = cnt; 794 uiop->uio_rw = UIO_READ; 795 UIO_SETUP_SYSSPACE(uiop); 796 error = VOP_READ(vp, uiop, IO_NODELOCKED, cred); 797 free((void *)iv2, M_TEMP); 798 } 799 read_error: 800 if (error || (getret = VOP_GETATTR(vp, &va, cred)) != 0){ 801 if (!error) 802 error = getret; 803 m_freem(mreq); 804 vput(vp); 805 nfsm_reply(NFSX_POSTOPATTR(v3)); 806 nfsm_srvpostop_attr(getret, &va); 807 return (0); 808 } 809 } else { 810 uiop->uio_resid = 0; 811 } 812 vput(vp); 813 nfsm_srvfillattr(&va, fp); 814 len -= uiop->uio_resid; 815 padlen = nfsm_padlen(len); 816 if (uiop->uio_resid || padlen) 817 nfs_zeropad(mb, uiop->uio_resid, padlen); 818 if (v3) { 819 /* count */ 820 *tl++ = txdr_unsigned(len); 821 /* eof */ 822 if (off + len >= va.va_size) 823 *tl++ = nfs_true; 824 else 825 *tl++ = nfs_false; 826 } 827 *tl = txdr_unsigned(len); 828 nfsm_srvdone; 829 } 830 831 /* 832 * nfs write service 833 */ 834 int 835 nfsrv_write(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 836 { 837 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 838 struct mbuf *nam = nfsd->nd_nam; 839 char *dpos = nfsd->nd_dpos; 840 kauth_cred_t cred = nfsd->nd_cr; 841 struct iovec *ivp; 842 int i, cnt; 843 struct mbuf *mp; 844 struct nfs_fattr *fp; 845 struct iovec *iv; 846 struct vattr va, forat; 847 u_int32_t *tl; 848 int32_t t1; 849 char *bpos; 850 int error = 0, rdonly, cache = 0, len, forat_ret = 1; 851 int ioflags, aftat_ret = 1, retlen, zeroing, adjust; 852 int stable = NFSV3WRITE_FILESYNC; 853 int v3 = (nfsd->nd_flag & ND_NFSV3); 854 char *cp2; 855 struct mbuf *mb, *mreq; 856 struct vnode *vp; 857 nfsrvfh_t nsfh; 858 struct uio io, *uiop = &io; 859 off_t off; 860 u_quad_t frev; 861 862 if (mrep == NULL) { 863 *mrq = NULL; 864 return (0); 865 } 866 nfsm_srvmtofh(&nsfh); 867 if (v3) { 868 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 869 off = fxdr_hyper(tl); 870 tl += 3; 871 stable = fxdr_unsigned(int, *tl++); 872 } else { 873 nfsm_dissect(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 874 off = (off_t)fxdr_unsigned(u_int32_t, *++tl); 875 tl += 2; 876 } 877 retlen = len = fxdr_unsigned(int32_t, *tl); 878 cnt = i = 0; 879 880 /* 881 * For NFS Version 2, it is not obvious what a write of zero length 882 * should do, but I might as well be consistent with Version 3, 883 * which is to return ok so long as there are no permission problems. 884 */ 885 if (len > 0) { 886 zeroing = 1; 887 mp = mrep; 888 while (mp) { 889 if (mp == md) { 890 zeroing = 0; 891 adjust = dpos - mtod(mp, char *); 892 mp->m_len -= adjust; 893 if (mp->m_len > 0 && adjust > 0) 894 NFSMADV(mp, adjust); 895 } 896 if (zeroing) 897 mp->m_len = 0; 898 else if (mp->m_len > 0) { 899 i += mp->m_len; 900 if (i > len) { 901 mp->m_len -= (i - len); 902 zeroing = 1; 903 } 904 if (mp->m_len > 0) 905 cnt++; 906 } 907 mp = mp->m_next; 908 } 909 } 910 if (len > NFS_MAXDATA || len < 0 || i < len) { 911 error = EIO; 912 nfsm_reply(2 * NFSX_UNSIGNED); 913 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 914 return (0); 915 } 916 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 917 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 918 if (error) { 919 nfsm_reply(2 * NFSX_UNSIGNED); 920 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 921 return (0); 922 } 923 if (v3) 924 forat_ret = VOP_GETATTR(vp, &forat, cred); 925 if (vp->v_type != VREG) { 926 if (v3) 927 error = EINVAL; 928 else 929 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 930 } 931 if (!error) { 932 nqsrv_getl(vp, ND_WRITE); 933 error = nfsrv_access(vp, VWRITE, cred, rdonly, lwp, 1); 934 } 935 if (error) { 936 vput(vp); 937 nfsm_reply(NFSX_WCCDATA(v3)); 938 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 939 return (0); 940 } 941 942 if (len > 0) { 943 ivp = malloc(cnt * sizeof (struct iovec), M_TEMP, M_WAITOK); 944 uiop->uio_iov = iv = ivp; 945 uiop->uio_iovcnt = cnt; 946 mp = mrep; 947 while (mp) { 948 if (mp->m_len > 0) { 949 ivp->iov_base = mtod(mp, void *); 950 ivp->iov_len = mp->m_len; 951 ivp++; 952 } 953 mp = mp->m_next; 954 } 955 956 /* 957 * XXX 958 * The IO_METASYNC flag indicates that all metadata (and not 959 * just enough to ensure data integrity) must be written to 960 * stable storage synchronously. 961 * (IO_METASYNC is not yet implemented in 4.4BSD-Lite.) 962 */ 963 if (stable == NFSV3WRITE_UNSTABLE) 964 ioflags = IO_NODELOCKED; 965 else if (stable == NFSV3WRITE_DATASYNC) 966 ioflags = (IO_SYNC | IO_NODELOCKED); 967 else 968 ioflags = (IO_METASYNC | IO_SYNC | IO_NODELOCKED); 969 uiop->uio_resid = len; 970 uiop->uio_rw = UIO_WRITE; 971 uiop->uio_offset = off; 972 UIO_SETUP_SYSSPACE(uiop); 973 error = VOP_WRITE(vp, uiop, ioflags, cred); 974 nfsstats.srvvop_writes++; 975 free(iv, M_TEMP); 976 } 977 aftat_ret = VOP_GETATTR(vp, &va, cred); 978 vput(vp); 979 if (!error) 980 error = aftat_ret; 981 nfsm_reply(NFSX_PREOPATTR(v3) + NFSX_POSTOPORFATTR(v3) + 982 2 * NFSX_UNSIGNED + NFSX_WRITEVERF(v3)); 983 if (v3) { 984 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 985 if (error) 986 return (0); 987 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 988 *tl++ = txdr_unsigned(retlen); 989 if (stable == NFSV3WRITE_UNSTABLE) 990 *tl++ = txdr_unsigned(stable); 991 else 992 *tl++ = txdr_unsigned(NFSV3WRITE_FILESYNC); 993 /* 994 * Actually, there is no need to txdr these fields, 995 * but it may make the values more human readable, 996 * for debugging purposes. 997 */ 998 *tl++ = txdr_unsigned(boottime.tv_sec); 999 *tl = txdr_unsigned(boottime.tv_nsec / 1000); 1000 } else { 1001 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 1002 nfsm_srvfillattr(&va, fp); 1003 } 1004 nfsm_srvdone; 1005 } 1006 1007 /* 1008 * XXX elad: the original NFSW_SAMECRED() macro also made sure the 1009 * two nd_flag fields of the descriptors contained 1010 * ND_KERBAUTH. 1011 */ 1012 static int 1013 nfsrv_samecred(kauth_cred_t cred1, kauth_cred_t cred2) 1014 { 1015 int i, do_ngroups; 1016 1017 if (kauth_cred_geteuid(cred1) != kauth_cred_geteuid(cred2)) 1018 return (0); 1019 if (kauth_cred_ngroups(cred1) != kauth_cred_ngroups(cred2)) 1020 return (0); 1021 do_ngroups = kauth_cred_ngroups(cred1); 1022 for (i = 0; i < do_ngroups; i++) 1023 if (kauth_cred_group(cred1, i) != 1024 kauth_cred_group(cred2, i)) 1025 return (0); 1026 1027 return (1); 1028 } 1029 1030 static struct nfsrvw_delayhash * 1031 nfsrv_nwdelayhash(struct nfssvc_sock *slp, const nfsrvfh_t *nsfh) 1032 { 1033 uint32_t hash; 1034 1035 hash = hash32_buf(NFSRVFH_DATA(nsfh), NFSRVFH_SIZE(nsfh), 1036 HASH32_BUF_INIT); 1037 return &slp->ns_wdelayhashtbl[hash % NFS_WDELAYHASHSIZ]; 1038 } 1039 1040 /* 1041 * NFS write service with write gathering support. Called when 1042 * nfsrvw_procrastinate > 0. 1043 * See: Chet Juszczak, "Improving the Write Performance of an NFS Server", 1044 * in Proc. of the Winter 1994 Usenix Conference, pg. 247-259, San Franscisco, 1045 * Jan. 1994. 1046 */ 1047 int 1048 nfsrv_writegather(struct nfsrv_descript **ndp, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 1049 { 1050 struct timeval now; 1051 struct iovec *ivp; 1052 struct mbuf *mp; 1053 struct nfsrv_descript *wp, *nfsd, *owp, *swp; 1054 struct nfs_fattr *fp; 1055 int i = 0; 1056 struct iovec *iov; 1057 struct nfsrvw_delayhash *wpp; 1058 kauth_cred_t cred; 1059 struct vattr va, forat; 1060 u_int32_t *tl; 1061 int32_t t1; 1062 char *bpos, *dpos; 1063 int error = 0, rdonly, cache = 0, len = 0, forat_ret = 1; 1064 int ioflags, aftat_ret = 1, adjust, v3, zeroing; 1065 char *cp2; 1066 struct mbuf *mb, *mreq, *mrep, *md; 1067 struct vnode *vp; 1068 struct uio io, *uiop = &io; 1069 u_quad_t frev, cur_usec; 1070 1071 *mrq = NULL; 1072 if (*ndp) { 1073 nfsd = *ndp; 1074 *ndp = NULL; 1075 mrep = nfsd->nd_mrep; 1076 md = nfsd->nd_md; 1077 dpos = nfsd->nd_dpos; 1078 cred = nfsd->nd_cr; 1079 v3 = (nfsd->nd_flag & ND_NFSV3); 1080 LIST_INIT(&nfsd->nd_coalesce); 1081 nfsd->nd_mreq = NULL; 1082 nfsd->nd_stable = NFSV3WRITE_FILESYNC; 1083 getmicrotime(&now); 1084 cur_usec = (u_quad_t)now.tv_sec * 1000000 + (u_quad_t)now.tv_usec; 1085 nfsd->nd_time = cur_usec + nfsrvw_procrastinate; 1086 1087 /* 1088 * Now, get the write header.. 1089 */ 1090 nfsm_srvmtofh(&nfsd->nd_fh); 1091 if (v3) { 1092 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 1093 nfsd->nd_off = fxdr_hyper(tl); 1094 tl += 3; 1095 nfsd->nd_stable = fxdr_unsigned(int, *tl++); 1096 } else { 1097 nfsm_dissect(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1098 nfsd->nd_off = (off_t)fxdr_unsigned(u_int32_t, *++tl); 1099 tl += 2; 1100 } 1101 len = fxdr_unsigned(int32_t, *tl); 1102 nfsd->nd_len = len; 1103 nfsd->nd_eoff = nfsd->nd_off + len; 1104 1105 /* 1106 * Trim the header out of the mbuf list and trim off any trailing 1107 * junk so that the mbuf list has only the write data. 1108 */ 1109 zeroing = 1; 1110 i = 0; 1111 mp = mrep; 1112 while (mp) { 1113 if (mp == md) { 1114 zeroing = 0; 1115 adjust = dpos - mtod(mp, char *); 1116 mp->m_len -= adjust; 1117 if (mp->m_len > 0 && adjust > 0) 1118 NFSMADV(mp, adjust); 1119 } 1120 if (zeroing) 1121 mp->m_len = 0; 1122 else { 1123 i += mp->m_len; 1124 if (i > len) { 1125 mp->m_len -= (i - len); 1126 zeroing = 1; 1127 } 1128 } 1129 mp = mp->m_next; 1130 } 1131 if (len > NFS_MAXDATA || len < 0 || i < len) { 1132 nfsmout: 1133 m_freem(mrep); 1134 error = EIO; 1135 nfsm_writereply(2 * NFSX_UNSIGNED, v3); 1136 if (v3) 1137 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1138 nfsd->nd_mreq = mreq; 1139 nfsd->nd_mrep = NULL; 1140 nfsd->nd_time = 0; 1141 } 1142 1143 /* 1144 * Add this entry to the hash and time queues. 1145 */ 1146 owp = NULL; 1147 mutex_enter(&nfsd_lock); 1148 wp = LIST_FIRST(&slp->ns_tq); 1149 while (wp && wp->nd_time < nfsd->nd_time) { 1150 owp = wp; 1151 wp = LIST_NEXT(wp, nd_tq); 1152 } 1153 if (owp) { 1154 LIST_INSERT_AFTER(owp, nfsd, nd_tq); 1155 } else { 1156 LIST_INSERT_HEAD(&slp->ns_tq, nfsd, nd_tq); 1157 } 1158 if (nfsd->nd_mrep) { 1159 wpp = nfsrv_nwdelayhash(slp, &nfsd->nd_fh); 1160 owp = NULL; 1161 wp = LIST_FIRST(wpp); 1162 while (wp && nfsrv_comparefh(&nfsd->nd_fh, &wp->nd_fh)) { 1163 owp = wp; 1164 wp = LIST_NEXT(wp, nd_hash); 1165 } 1166 while (wp && wp->nd_off < nfsd->nd_off && 1167 !nfsrv_comparefh(&nfsd->nd_fh, &wp->nd_fh)) { 1168 owp = wp; 1169 wp = LIST_NEXT(wp, nd_hash); 1170 } 1171 if (owp) { 1172 LIST_INSERT_AFTER(owp, nfsd, nd_hash); 1173 1174 /* 1175 * Search the hash list for overlapping entries and 1176 * coalesce. 1177 */ 1178 for(; nfsd && NFSW_CONTIG(owp, nfsd); nfsd = wp) { 1179 wp = LIST_NEXT(nfsd, nd_hash); 1180 if (nfsrv_samecred(owp->nd_cr, nfsd->nd_cr)) 1181 nfsrvw_coalesce(owp, nfsd); 1182 } 1183 } else { 1184 LIST_INSERT_HEAD(wpp, nfsd, nd_hash); 1185 } 1186 } 1187 mutex_exit(&nfsd_lock); 1188 } 1189 1190 /* 1191 * Now, do VOP_WRITE()s for any one(s) that need to be done now 1192 * and generate the associated reply mbuf list(s). 1193 */ 1194 loop1: 1195 getmicrotime(&now); 1196 cur_usec = (u_quad_t)now.tv_sec * 1000000 + (u_quad_t)now.tv_usec; 1197 mutex_enter(&nfsd_lock); 1198 for (nfsd = LIST_FIRST(&slp->ns_tq); nfsd; nfsd = owp) { 1199 owp = LIST_NEXT(nfsd, nd_tq); 1200 if (nfsd->nd_time > cur_usec) 1201 break; 1202 if (nfsd->nd_mreq) 1203 continue; 1204 LIST_REMOVE(nfsd, nd_tq); 1205 LIST_REMOVE(nfsd, nd_hash); 1206 mutex_exit(&nfsd_lock); 1207 1208 mrep = nfsd->nd_mrep; 1209 nfsd->nd_mrep = NULL; 1210 cred = nfsd->nd_cr; 1211 v3 = (nfsd->nd_flag & ND_NFSV3); 1212 forat_ret = aftat_ret = 1; 1213 error = nfsrv_fhtovp(&nfsd->nd_fh, 1, &vp, cred, slp, 1214 nfsd->nd_nam, &rdonly, (nfsd->nd_flag & ND_KERBAUTH), 1215 false); 1216 if (!error) { 1217 if (v3) 1218 forat_ret = VOP_GETATTR(vp, &forat, cred); 1219 if (vp->v_type != VREG) { 1220 if (v3) 1221 error = EINVAL; 1222 else 1223 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 1224 } 1225 } else 1226 vp = NULL; 1227 if (!error) { 1228 nqsrv_getl(vp, ND_WRITE); 1229 error = nfsrv_access(vp, VWRITE, cred, rdonly, lwp, 1); 1230 } 1231 1232 if (nfsd->nd_stable == NFSV3WRITE_UNSTABLE) 1233 ioflags = IO_NODELOCKED; 1234 else if (nfsd->nd_stable == NFSV3WRITE_DATASYNC) 1235 ioflags = (IO_SYNC | IO_NODELOCKED); 1236 else 1237 ioflags = (IO_METASYNC | IO_SYNC | IO_NODELOCKED); 1238 uiop->uio_rw = UIO_WRITE; 1239 uiop->uio_offset = nfsd->nd_off; 1240 uiop->uio_resid = nfsd->nd_eoff - nfsd->nd_off; 1241 UIO_SETUP_SYSSPACE(uiop); 1242 if (uiop->uio_resid > 0) { 1243 mp = mrep; 1244 i = 0; 1245 while (mp) { 1246 if (mp->m_len > 0) 1247 i++; 1248 mp = mp->m_next; 1249 } 1250 uiop->uio_iovcnt = i; 1251 iov = malloc(i * sizeof (struct iovec), M_TEMP, M_WAITOK); 1252 uiop->uio_iov = ivp = iov; 1253 mp = mrep; 1254 while (mp) { 1255 if (mp->m_len > 0) { 1256 ivp->iov_base = mtod(mp, void *); 1257 ivp->iov_len = mp->m_len; 1258 ivp++; 1259 } 1260 mp = mp->m_next; 1261 } 1262 if (!error) { 1263 error = VOP_WRITE(vp, uiop, ioflags, cred); 1264 nfsstats.srvvop_writes++; 1265 } 1266 free((void *)iov, M_TEMP); 1267 } 1268 m_freem(mrep); 1269 if (vp) { 1270 aftat_ret = VOP_GETATTR(vp, &va, cred); 1271 vput(vp); 1272 } 1273 1274 /* 1275 * Loop around generating replies for all write rpcs that have 1276 * now been completed. 1277 */ 1278 swp = nfsd; 1279 do { 1280 if (error) { 1281 nfsm_writereply(NFSX_WCCDATA(v3), v3); 1282 if (v3) { 1283 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1284 } 1285 } else { 1286 nfsm_writereply(NFSX_PREOPATTR(v3) + 1287 NFSX_POSTOPORFATTR(v3) + 2 * NFSX_UNSIGNED + 1288 NFSX_WRITEVERF(v3), v3); 1289 if (v3) { 1290 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1291 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1292 *tl++ = txdr_unsigned(nfsd->nd_len); 1293 *tl++ = txdr_unsigned(swp->nd_stable); 1294 /* 1295 * Actually, there is no need to txdr these fields, 1296 * but it may make the values more human readable, 1297 * for debugging purposes. 1298 */ 1299 *tl++ = txdr_unsigned(boottime.tv_sec); 1300 *tl = txdr_unsigned(boottime.tv_nsec / 1000); 1301 } else { 1302 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 1303 nfsm_srvfillattr(&va, fp); 1304 } 1305 } 1306 nfsd->nd_mreq = mreq; 1307 if (nfsd->nd_mrep) 1308 panic("nfsrv_write: nd_mrep not free"); 1309 1310 /* 1311 * Done. Put it at the head of the timer queue so that 1312 * the final phase can return the reply. 1313 */ 1314 mutex_enter(&nfsd_lock); 1315 if (nfsd != swp) { 1316 nfsd->nd_time = 0; 1317 LIST_INSERT_HEAD(&slp->ns_tq, nfsd, nd_tq); 1318 } 1319 nfsd = LIST_FIRST(&swp->nd_coalesce); 1320 if (nfsd) { 1321 LIST_REMOVE(nfsd, nd_tq); 1322 } 1323 mutex_exit(&nfsd_lock); 1324 } while (nfsd); 1325 swp->nd_time = 0; 1326 1327 mutex_enter(&nfsd_lock); 1328 LIST_INSERT_HEAD(&slp->ns_tq, swp, nd_tq); 1329 mutex_exit(&nfsd_lock); 1330 goto loop1; 1331 } 1332 mutex_exit(&nfsd_lock); 1333 nfs_timer_start(); 1334 1335 /* 1336 * Search for a reply to return. 1337 */ 1338 mutex_enter(&nfsd_lock); 1339 LIST_FOREACH(nfsd, &slp->ns_tq, nd_tq) { 1340 if (nfsd->nd_mreq) { 1341 LIST_REMOVE(nfsd, nd_tq); 1342 *mrq = nfsd->nd_mreq; 1343 *ndp = nfsd; 1344 break; 1345 } 1346 } 1347 mutex_exit(&nfsd_lock); 1348 return (0); 1349 } 1350 1351 /* 1352 * Coalesce the write request nfsd into owp. To do this we must: 1353 * - remove nfsd from the queues 1354 * - merge nfsd->nd_mrep into owp->nd_mrep 1355 * - update the nd_eoff and nd_stable for owp 1356 * - put nfsd on owp's nd_coalesce list 1357 * NB: Must be called at splsoftclock(). 1358 */ 1359 void 1360 nfsrvw_coalesce(struct nfsrv_descript *owp, struct nfsrv_descript *nfsd) 1361 { 1362 int overlap; 1363 struct mbuf *mp; 1364 struct nfsrv_descript *m; 1365 1366 KASSERT(mutex_owned(&nfsd_lock)); 1367 1368 LIST_REMOVE(nfsd, nd_hash); 1369 LIST_REMOVE(nfsd, nd_tq); 1370 if (owp->nd_eoff < nfsd->nd_eoff) { 1371 overlap = owp->nd_eoff - nfsd->nd_off; 1372 if (overlap < 0) 1373 panic("nfsrv_coalesce: bad off"); 1374 if (overlap > 0) 1375 m_adj(nfsd->nd_mrep, overlap); 1376 mp = owp->nd_mrep; 1377 while (mp->m_next) 1378 mp = mp->m_next; 1379 mp->m_next = nfsd->nd_mrep; 1380 owp->nd_eoff = nfsd->nd_eoff; 1381 } else 1382 m_freem(nfsd->nd_mrep); 1383 nfsd->nd_mrep = NULL; 1384 if (nfsd->nd_stable == NFSV3WRITE_FILESYNC) 1385 owp->nd_stable = NFSV3WRITE_FILESYNC; 1386 else if (nfsd->nd_stable == NFSV3WRITE_DATASYNC && 1387 owp->nd_stable == NFSV3WRITE_UNSTABLE) 1388 owp->nd_stable = NFSV3WRITE_DATASYNC; 1389 LIST_INSERT_HEAD(&owp->nd_coalesce, nfsd, nd_tq); 1390 /* 1391 * nfsd might hold coalesce elements! Move them to owp. 1392 * Otherwise, requests may be lost and clients will be stuck. 1393 */ 1394 while ((m = LIST_FIRST(&nfsd->nd_coalesce)) != NULL) { 1395 LIST_REMOVE(m, nd_tq); 1396 LIST_INSERT_HEAD(&owp->nd_coalesce, m, nd_tq); 1397 } 1398 } 1399 1400 /* 1401 * nfs create service 1402 * now does a truncate to 0 length via. setattr if it already exists 1403 */ 1404 int 1405 nfsrv_create(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 1406 { 1407 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1408 struct mbuf *nam = nfsd->nd_nam; 1409 char *dpos = nfsd->nd_dpos; 1410 kauth_cred_t cred = nfsd->nd_cr; 1411 struct nfs_fattr *fp; 1412 struct vattr va, dirfor, diraft; 1413 struct nfsv2_sattr *sp; 1414 u_int32_t *tl; 1415 struct nameidata nd; 1416 char *cp; 1417 int32_t t1; 1418 char *bpos; 1419 int error = 0, cache = 0, len, tsize, dirfor_ret = 1, diraft_ret = 1; 1420 int rdev = 0, abort = 0; 1421 int v3 = (nfsd->nd_flag & ND_NFSV3), how, exclusive_flag = 0; 1422 char *cp2; 1423 struct mbuf *mb, *mreq; 1424 struct vnode *vp = NULL, *dirp = NULL; 1425 nfsrvfh_t nsfh; 1426 u_quad_t frev, tempsize; 1427 u_char cverf[NFSX_V3CREATEVERF]; 1428 1429 nd.ni_cnd.cn_nameiop = 0; 1430 nfsm_srvmtofh(&nsfh); 1431 nfsm_srvnamesiz(len); 1432 nd.ni_cnd.cn_cred = cred; 1433 nd.ni_cnd.cn_nameiop = CREATE; 1434 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 1435 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 1436 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 1437 if (dirp && v3) { 1438 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); 1439 } 1440 if (error) { 1441 nfsm_reply(NFSX_WCCDATA(v3)); 1442 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1443 if (dirp) 1444 vrele(dirp); 1445 if (nd.ni_pathbuf != NULL) { 1446 pathbuf_destroy(nd.ni_pathbuf); 1447 nd.ni_pathbuf = NULL; 1448 } 1449 return (0); 1450 } 1451 abort = 1; 1452 vattr_null(&va); 1453 if (v3) { 1454 va.va_mode = 0; 1455 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1456 how = fxdr_unsigned(int, *tl); 1457 switch (how) { 1458 case NFSV3CREATE_GUARDED: 1459 if (nd.ni_vp) { 1460 error = EEXIST; 1461 break; 1462 } 1463 case NFSV3CREATE_UNCHECKED: 1464 nfsm_srvsattr(&va); 1465 break; 1466 case NFSV3CREATE_EXCLUSIVE: 1467 nfsm_dissect(cp, void *, NFSX_V3CREATEVERF); 1468 memcpy(cverf, cp, NFSX_V3CREATEVERF); 1469 exclusive_flag = 1; 1470 break; 1471 }; 1472 va.va_type = VREG; 1473 } else { 1474 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1475 va.va_type = IFTOVT(fxdr_unsigned(u_int32_t, sp->sa_mode)); 1476 if (va.va_type == VNON) 1477 va.va_type = VREG; 1478 va.va_mode = nfstov_mode(sp->sa_mode); 1479 switch (va.va_type) { 1480 case VREG: 1481 tsize = fxdr_unsigned(int32_t, sp->sa_size); 1482 if (tsize != -1) 1483 va.va_size = (u_quad_t)tsize; 1484 break; 1485 case VCHR: 1486 case VBLK: 1487 case VFIFO: 1488 rdev = fxdr_unsigned(int32_t, sp->sa_size); 1489 break; 1490 default: 1491 break; 1492 }; 1493 } 1494 1495 /* 1496 * Iff doesn't exist, create it 1497 * otherwise just truncate to 0 length 1498 * should I set the mode too ?? 1499 */ 1500 if (nd.ni_vp == NULL) { 1501 if (va.va_type == VREG || va.va_type == VSOCK) { 1502 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1503 error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1504 if (!error) { 1505 if (exclusive_flag) { 1506 exclusive_flag = 0; 1507 vattr_null(&va); 1508 /* 1509 * XXX 1510 * assuming NFSX_V3CREATEVERF 1511 * == sizeof(nfstime3) 1512 */ 1513 fxdr_nfsv3time(cverf, &va.va_atime); 1514 error = VOP_SETATTR(nd.ni_vp, &va, 1515 cred); 1516 } 1517 } 1518 } else if (va.va_type == VCHR || va.va_type == VBLK || 1519 va.va_type == VFIFO) { 1520 if (va.va_type == VCHR && rdev == 0xffffffff) 1521 va.va_type = VFIFO; 1522 if (va.va_type != VFIFO && 1523 (error = kauth_authorize_system(cred, 1524 KAUTH_SYSTEM_MKNOD, 0, NULL, NULL, NULL))) { 1525 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1526 vput(nd.ni_dvp); 1527 abort = 0; 1528 nfsm_reply(0); 1529 if (nd.ni_pathbuf != NULL) { 1530 pathbuf_destroy(nd.ni_pathbuf); 1531 nd.ni_pathbuf = NULL; 1532 } 1533 return (error); 1534 } else 1535 va.va_rdev = (dev_t)rdev; 1536 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1537 error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, 1538 &va); 1539 if (error) { 1540 nfsm_reply(0); 1541 } 1542 } else { 1543 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1544 if (nd.ni_pathbuf != NULL) { 1545 pathbuf_destroy(nd.ni_pathbuf); 1546 nd.ni_pathbuf = NULL; 1547 } 1548 vput(nd.ni_dvp); 1549 error = ENXIO; 1550 abort = 0; 1551 } 1552 vp = nd.ni_vp; 1553 } else { 1554 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1555 if (nd.ni_pathbuf != NULL) { 1556 pathbuf_destroy(nd.ni_pathbuf); 1557 nd.ni_pathbuf = NULL; 1558 } 1559 vp = nd.ni_vp; 1560 if (nd.ni_dvp == vp) 1561 vrele(nd.ni_dvp); 1562 else 1563 vput(nd.ni_dvp); 1564 abort = 0; 1565 if (!error && va.va_size != -1) { 1566 error = nfsrv_access(vp, VWRITE, cred, 1567 (nd.ni_cnd.cn_flags & RDONLY), lwp, 0); 1568 if (!error) { 1569 nqsrv_getl(vp, ND_WRITE); 1570 tempsize = va.va_size; 1571 vattr_null(&va); 1572 va.va_size = tempsize; 1573 error = VOP_SETATTR(vp, &va, cred); 1574 } 1575 } 1576 if (error) 1577 vput(vp); 1578 } 1579 if (!error) { 1580 error = nfsrv_composefh(vp, &nsfh, v3); 1581 if (!error) 1582 error = VOP_GETATTR(vp, &va, cred); 1583 vput(vp); 1584 } 1585 if (v3) { 1586 if (exclusive_flag && !error) { 1587 /* 1588 * XXX assuming NFSX_V3CREATEVERF == sizeof(nfstime3) 1589 */ 1590 char oldverf[NFSX_V3CREATEVERF]; 1591 1592 txdr_nfsv3time(&va.va_atime, oldverf); 1593 if (memcmp(cverf, oldverf, NFSX_V3CREATEVERF)) 1594 error = EEXIST; 1595 } 1596 if (dirp) { 1597 vn_lock(dirp, LK_SHARED | LK_RETRY); 1598 diraft_ret = VOP_GETATTR(dirp, &diraft, cred); 1599 VOP_UNLOCK(dirp); 1600 } 1601 } 1602 if (dirp) { 1603 vrele(dirp); 1604 dirp = NULL; 1605 } 1606 if (nd.ni_pathbuf != NULL) { 1607 pathbuf_destroy(nd.ni_pathbuf); 1608 nd.ni_pathbuf = NULL; 1609 } 1610 abort = 0; 1611 nfsm_reply(NFSX_SRVFH(&nsfh, v3) + NFSX_FATTR(v3) + NFSX_WCCDATA(v3)); 1612 if (v3) { 1613 if (!error) { 1614 nfsm_srvpostop_fh(&nsfh); 1615 nfsm_srvpostop_attr(0, &va); 1616 } 1617 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1618 } else { 1619 nfsm_srvfhtom(&nsfh, v3); 1620 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 1621 nfsm_srvfillattr(&va, fp); 1622 } 1623 return (0); 1624 nfsmout: 1625 if (dirp) 1626 vrele(dirp); 1627 if (abort) { 1628 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1629 if (nd.ni_dvp == nd.ni_vp) 1630 vrele(nd.ni_dvp); 1631 else 1632 vput(nd.ni_dvp); 1633 if (nd.ni_vp) 1634 vput(nd.ni_vp); 1635 } 1636 if (nd.ni_pathbuf != NULL) { 1637 pathbuf_destroy(nd.ni_pathbuf); 1638 nd.ni_pathbuf = NULL; 1639 } 1640 return (error); 1641 } 1642 1643 /* 1644 * nfs v3 mknod service 1645 */ 1646 int 1647 nfsrv_mknod(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 1648 { 1649 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1650 struct mbuf *nam = nfsd->nd_nam; 1651 char *dpos = nfsd->nd_dpos; 1652 kauth_cred_t cred = nfsd->nd_cr; 1653 struct vattr va, dirfor, diraft; 1654 u_int32_t *tl; 1655 struct nameidata nd; 1656 int32_t t1; 1657 char *bpos; 1658 int error = 0, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 1659 int abort = 0; 1660 u_int32_t major, minor; 1661 enum vtype vtyp; 1662 char *cp2; 1663 struct mbuf *mb, *mreq; 1664 struct vnode *vp, *dirp = (struct vnode *)0; 1665 nfsrvfh_t nsfh; 1666 u_quad_t frev; 1667 1668 nd.ni_cnd.cn_nameiop = 0; 1669 nfsm_srvmtofh(&nsfh); 1670 nfsm_srvnamesiz(len); 1671 nd.ni_cnd.cn_cred = cred; 1672 nd.ni_cnd.cn_nameiop = CREATE; 1673 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 1674 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 1675 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 1676 if (dirp) 1677 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); 1678 if (error) { 1679 nfsm_reply(NFSX_WCCDATA(1)); 1680 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1681 if (dirp) 1682 vrele(dirp); 1683 if (nd.ni_pathbuf != NULL) { 1684 pathbuf_destroy(nd.ni_pathbuf); 1685 nd.ni_pathbuf = NULL; 1686 } 1687 return (0); 1688 } 1689 abort = 1; 1690 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1691 vtyp = nfsv3tov_type(*tl); 1692 if (vtyp != VCHR && vtyp != VBLK && vtyp != VSOCK && vtyp != VFIFO) { 1693 error = NFSERR_BADTYPE; 1694 goto abort; 1695 } 1696 vattr_null(&va); 1697 va.va_mode = 0; 1698 nfsm_srvsattr(&va); 1699 if (vtyp == VCHR || vtyp == VBLK) { 1700 dev_t rdev; 1701 1702 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1703 major = fxdr_unsigned(u_int32_t, *tl++); 1704 minor = fxdr_unsigned(u_int32_t, *tl); 1705 rdev = makedev(major, minor); 1706 if (major(rdev) != major || minor(rdev) != minor) { 1707 error = EINVAL; 1708 goto abort; 1709 } 1710 va.va_rdev = rdev; 1711 } 1712 1713 /* 1714 * Iff doesn't exist, create it. 1715 */ 1716 if (nd.ni_vp) { 1717 error = EEXIST; 1718 abort: 1719 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1720 if (nd.ni_dvp == nd.ni_vp) 1721 vrele(nd.ni_dvp); 1722 else 1723 vput(nd.ni_dvp); 1724 if (nd.ni_vp) 1725 vput(nd.ni_vp); 1726 if (nd.ni_pathbuf != NULL) { 1727 pathbuf_destroy(nd.ni_pathbuf); 1728 nd.ni_pathbuf = NULL; 1729 } 1730 goto out; 1731 } 1732 va.va_type = vtyp; 1733 if (vtyp == VSOCK) { 1734 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1735 error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1736 } else { 1737 if (va.va_type != VFIFO && 1738 (error = kauth_authorize_system(cred, 1739 KAUTH_SYSTEM_MKNOD, 0, NULL, NULL, NULL))) { 1740 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1741 vput(nd.ni_dvp); 1742 goto out; 1743 } 1744 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1745 error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1746 if (error) 1747 goto out; 1748 } 1749 out: 1750 vp = nd.ni_vp; 1751 if (!error) { 1752 error = nfsrv_composefh(vp, &nsfh, true); 1753 if (!error) 1754 error = VOP_GETATTR(vp, &va, cred); 1755 vput(vp); 1756 } 1757 if (dirp) { 1758 vn_lock(dirp, LK_SHARED | LK_RETRY); 1759 diraft_ret = VOP_GETATTR(dirp, &diraft, cred); 1760 VOP_UNLOCK(dirp); 1761 vrele(dirp); 1762 dirp = NULL; 1763 } 1764 if (nd.ni_pathbuf != NULL) { 1765 pathbuf_destroy(nd.ni_pathbuf); 1766 nd.ni_pathbuf = NULL; 1767 } 1768 abort = 0; 1769 nfsm_reply(NFSX_SRVFH(&nsfh, true) + NFSX_POSTOPATTR(1) + 1770 NFSX_WCCDATA(1)); 1771 if (!error) { 1772 nfsm_srvpostop_fh(&nsfh); 1773 nfsm_srvpostop_attr(0, &va); 1774 } 1775 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1776 return (0); 1777 nfsmout: 1778 if (abort) { 1779 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1780 if (nd.ni_dvp == nd.ni_vp) 1781 vrele(nd.ni_dvp); 1782 else 1783 vput(nd.ni_dvp); 1784 if (nd.ni_vp) 1785 vput(nd.ni_vp); 1786 } 1787 if (nd.ni_pathbuf != NULL) { 1788 pathbuf_destroy(nd.ni_pathbuf); 1789 nd.ni_pathbuf = NULL; 1790 } 1791 if (dirp) 1792 vrele(dirp); 1793 return (error); 1794 } 1795 1796 /* 1797 * nfs remove service 1798 */ 1799 int 1800 nfsrv_remove(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 1801 { 1802 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1803 struct mbuf *nam = nfsd->nd_nam; 1804 char *dpos = nfsd->nd_dpos; 1805 kauth_cred_t cred = nfsd->nd_cr; 1806 struct nameidata nd; 1807 u_int32_t *tl; 1808 int32_t t1; 1809 char *bpos; 1810 int error = 0, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 1811 int v3 = (nfsd->nd_flag & ND_NFSV3); 1812 char *cp2; 1813 struct mbuf *mb, *mreq; 1814 struct vnode *vp, *dirp; 1815 struct vattr dirfor, diraft; 1816 nfsrvfh_t nsfh; 1817 u_quad_t frev; 1818 1819 #ifndef nolint 1820 vp = (struct vnode *)0; 1821 #endif 1822 nfsm_srvmtofh(&nsfh); 1823 nfsm_srvnamesiz(len); 1824 nd.ni_cnd.cn_cred = cred; 1825 nd.ni_cnd.cn_nameiop = DELETE; 1826 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 1827 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 1828 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 1829 if (error == 0 && dirp && v3) { 1830 if (nd.ni_dvp == nd.ni_vp) 1831 vn_lock(dirp, LK_SHARED | LK_RETRY); 1832 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); 1833 if (nd.ni_dvp == nd.ni_vp) 1834 VOP_UNLOCK(dirp); 1835 } 1836 if (!error) { 1837 vp = nd.ni_vp; 1838 if (vp->v_type == VDIR) { 1839 error = EPERM; 1840 goto out; 1841 } 1842 /* 1843 * The root of a mounted filesystem cannot be deleted. 1844 */ 1845 if (vp->v_vflag & VV_ROOT) { 1846 error = EBUSY; 1847 } 1848 out: 1849 if (!error) { 1850 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1851 nqsrv_getl(vp, ND_WRITE); 1852 error = VOP_REMOVE(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); 1853 } else { 1854 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1855 if (nd.ni_dvp == vp) 1856 vrele(nd.ni_dvp); 1857 else 1858 vput(nd.ni_dvp); 1859 vput(vp); 1860 } 1861 } 1862 if (nd.ni_pathbuf != NULL) { 1863 pathbuf_destroy(nd.ni_pathbuf); 1864 nd.ni_pathbuf = NULL; 1865 } 1866 if (dirp) { 1867 if (v3) { 1868 vn_lock(dirp, LK_SHARED | LK_RETRY); 1869 diraft_ret = VOP_GETATTR(dirp, &diraft, cred); 1870 VOP_UNLOCK(dirp); 1871 } 1872 vrele(dirp); 1873 } 1874 nfsm_reply(NFSX_WCCDATA(v3)); 1875 if (v3) { 1876 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1877 return (0); 1878 } 1879 nfsm_srvdone; 1880 } 1881 1882 /* 1883 * nfs rename service 1884 */ 1885 int 1886 nfsrv_rename(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 1887 { 1888 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1889 struct mbuf *nam = nfsd->nd_nam; 1890 char *dpos = nfsd->nd_dpos; 1891 kauth_cred_t cred = nfsd->nd_cr; 1892 u_int32_t *tl; 1893 int32_t t1; 1894 char *bpos; 1895 int error = 0, cache = 0, fdirfor_ret = 1, fdiraft_ret = 1; 1896 uint32_t len, len2; 1897 int tdirfor_ret = 1, tdiraft_ret = 1; 1898 int v3 = (nfsd->nd_flag & ND_NFSV3); 1899 char *cp2; 1900 struct mbuf *mb, *mreq; 1901 struct nameidata fromnd, tond; 1902 struct vnode *fvp, *tvp, *tdvp; 1903 struct vnode *fdirp = NULL, *tdirp = NULL; 1904 struct mount *localfs = NULL; 1905 struct vattr fdirfor, fdiraft, tdirfor, tdiraft; 1906 nfsrvfh_t fnsfh, tnsfh; 1907 u_quad_t frev; 1908 uid_t saved_uid; 1909 1910 #ifndef nolint 1911 fvp = (struct vnode *)0; 1912 #endif 1913 fromnd.ni_cnd.cn_nameiop = 0; 1914 tond.ni_cnd.cn_nameiop = 0; 1915 nfsm_srvmtofh(&fnsfh); 1916 nfsm_srvnamesiz(len); 1917 /* 1918 * Remember our original uid so that we can reset cr_uid before 1919 * the second nfs_namei() call, in case it is remapped. 1920 */ 1921 saved_uid = kauth_cred_geteuid(cred); 1922 fromnd.ni_cnd.cn_cred = cred; 1923 fromnd.ni_cnd.cn_nameiop = DELETE; 1924 fromnd.ni_cnd.cn_flags = LOCKPARENT | INRENAME; 1925 error = nfs_namei(&fromnd, &fnsfh, len, slp, nam, &md, 1926 &dpos, &fdirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 1927 if (error == 0 && fdirp && v3) { 1928 if (fromnd.ni_dvp == fromnd.ni_vp) 1929 vn_lock(fdirp, LK_SHARED | LK_RETRY); 1930 fdirfor_ret = VOP_GETATTR(fdirp, &fdirfor, cred); 1931 if (fromnd.ni_dvp == fromnd.ni_vp) 1932 VOP_UNLOCK(fdirp); 1933 } 1934 if (error) { 1935 fromnd.ni_cnd.cn_nameiop = 0; 1936 nfsm_reply(2 * NFSX_WCCDATA(v3)); 1937 nfsm_srvwcc_data(fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft); 1938 nfsm_srvwcc_data(tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft); 1939 if (fdirp) 1940 vrele(fdirp); 1941 if (fromnd.ni_pathbuf != NULL) { 1942 pathbuf_destroy(fromnd.ni_pathbuf); 1943 } 1944 return (0); 1945 } 1946 if (fromnd.ni_dvp != fromnd.ni_vp) { 1947 VOP_UNLOCK(fromnd.ni_dvp); 1948 } 1949 fvp = fromnd.ni_vp; 1950 1951 localfs = fvp->v_mount; 1952 error = VFS_RENAMELOCK_ENTER(localfs); 1953 if (error) { 1954 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 1955 vrele(fromnd.ni_dvp); 1956 vrele(fvp); 1957 goto out1; 1958 } 1959 1960 /* Copied, regrettably, from vfs_syscalls.c (q.v.) */ 1961 vrele(fvp); 1962 if ((fromnd.ni_cnd.cn_namelen == 1 && 1963 fromnd.ni_cnd.cn_nameptr[0] == '.') || 1964 (fromnd.ni_cnd.cn_namelen == 2 && 1965 fromnd.ni_cnd.cn_nameptr[0] == '.' && 1966 fromnd.ni_cnd.cn_nameptr[1] == '.')) { 1967 error = EINVAL; 1968 VFS_RENAMELOCK_EXIT(localfs); 1969 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 1970 vrele(fromnd.ni_dvp); 1971 goto out1; 1972 } 1973 vn_lock(fromnd.ni_dvp, LK_EXCLUSIVE | LK_RETRY); 1974 error = relookup(fromnd.ni_dvp, &fromnd.ni_vp, &fromnd.ni_cnd, 0); 1975 if (error) { 1976 VOP_UNLOCK(fromnd.ni_dvp); 1977 VFS_RENAMELOCK_EXIT(localfs); 1978 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 1979 vrele(fromnd.ni_dvp); 1980 goto out1; 1981 } 1982 VOP_UNLOCK(fromnd.ni_vp); 1983 if (fromnd.ni_dvp != fromnd.ni_vp) 1984 VOP_UNLOCK(fromnd.ni_dvp); 1985 fvp = fromnd.ni_vp; 1986 1987 nfsm_srvmtofh(&tnsfh); 1988 if (v3) { 1989 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 1990 len2 = fxdr_unsigned(uint32_t, *tl); 1991 /* len2 will be checked by nfs_namei */ 1992 } 1993 else { 1994 /* NFSv2 */ 1995 nfsm_strsiz(len2, NFS_MAXNAMLEN); 1996 } 1997 kauth_cred_seteuid(cred, saved_uid); 1998 tond.ni_cnd.cn_cred = cred; 1999 tond.ni_cnd.cn_nameiop = RENAME; 2000 tond.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF | NOCACHE | INRENAME; 2001 error = nfs_namei(&tond, &tnsfh, len2, slp, nam, &md, 2002 &dpos, &tdirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 2003 if (tdirp && v3) { 2004 tdirfor_ret = VOP_GETATTR(tdirp, &tdirfor, cred); 2005 } 2006 if (error) { 2007 VFS_RENAMELOCK_EXIT(localfs); 2008 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 2009 vrele(fromnd.ni_dvp); 2010 vrele(fvp); 2011 goto out1; 2012 } 2013 tdvp = tond.ni_dvp; 2014 tvp = tond.ni_vp; 2015 if (tvp != NULL) { 2016 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 2017 if (v3) 2018 error = EEXIST; 2019 else 2020 error = EISDIR; 2021 goto out; 2022 } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 2023 if (v3) 2024 error = EEXIST; 2025 else 2026 error = ENOTDIR; 2027 goto out; 2028 } 2029 if (tvp->v_type == VDIR && tvp->v_mountedhere) { 2030 if (v3) 2031 error = EXDEV; 2032 else 2033 error = ENOTEMPTY; 2034 goto out; 2035 } 2036 } 2037 if (fvp->v_type == VDIR && fvp->v_mountedhere) { 2038 if (v3) 2039 error = EXDEV; 2040 else 2041 error = ENOTEMPTY; 2042 goto out; 2043 } 2044 if (fvp->v_mount != tdvp->v_mount) { 2045 if (v3) 2046 error = EXDEV; 2047 else 2048 error = ENOTEMPTY; 2049 goto out; 2050 } 2051 if (fvp == tdvp) { 2052 if (v3) 2053 error = EINVAL; 2054 else 2055 error = ENOTEMPTY; 2056 } 2057 /* 2058 * If source is the same as the destination (that is the 2059 * same vnode with the same name in the same directory), 2060 * then there is nothing to do. 2061 */ 2062 if (fvp == tvp && fromnd.ni_dvp == tdvp && 2063 fromnd.ni_cnd.cn_namelen == tond.ni_cnd.cn_namelen && 2064 !memcmp(fromnd.ni_cnd.cn_nameptr, tond.ni_cnd.cn_nameptr, 2065 fromnd.ni_cnd.cn_namelen)) 2066 error = -1; 2067 out: 2068 if (!error) { 2069 nqsrv_getl(fromnd.ni_dvp, ND_WRITE); 2070 nqsrv_getl(tdvp, ND_WRITE); 2071 if (tvp) { 2072 nqsrv_getl(tvp, ND_WRITE); 2073 } 2074 error = VOP_RENAME(fromnd.ni_dvp, fromnd.ni_vp, &fromnd.ni_cnd, 2075 tond.ni_dvp, tond.ni_vp, &tond.ni_cnd); 2076 VFS_RENAMELOCK_EXIT(localfs); 2077 } else { 2078 VOP_ABORTOP(tond.ni_dvp, &tond.ni_cnd); 2079 if (tdvp == tvp) 2080 vrele(tdvp); 2081 else 2082 vput(tdvp); 2083 if (tvp) 2084 vput(tvp); 2085 VFS_RENAMELOCK_EXIT(localfs); 2086 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 2087 vrele(fromnd.ni_dvp); 2088 vrele(fvp); 2089 if (error == -1) 2090 error = 0; 2091 } 2092 if (tond.ni_pathbuf != NULL) { 2093 pathbuf_destroy(tond.ni_pathbuf); 2094 tond.ni_pathbuf = NULL; 2095 } 2096 tond.ni_cnd.cn_nameiop = 0; 2097 out1: 2098 if (fdirp) { 2099 if (v3) { 2100 vn_lock(fdirp, LK_SHARED | LK_RETRY); 2101 fdiraft_ret = VOP_GETATTR(fdirp, &fdiraft, cred); 2102 VOP_UNLOCK(fdirp); 2103 } 2104 vrele(fdirp); 2105 fdirp = NULL; 2106 } 2107 if (tdirp) { 2108 if (v3) { 2109 vn_lock(tdirp, LK_SHARED | LK_RETRY); 2110 tdiraft_ret = VOP_GETATTR(tdirp, &tdiraft, cred); 2111 VOP_UNLOCK(tdirp); 2112 } 2113 vrele(tdirp); 2114 tdirp = NULL; 2115 } 2116 pathbuf_destroy(fromnd.ni_pathbuf); 2117 fromnd.ni_pathbuf = NULL; 2118 fromnd.ni_cnd.cn_nameiop = 0; 2119 localfs = NULL; 2120 nfsm_reply(2 * NFSX_WCCDATA(v3)); 2121 if (v3) { 2122 nfsm_srvwcc_data(fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft); 2123 nfsm_srvwcc_data(tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft); 2124 } 2125 return (0); 2126 2127 nfsmout: 2128 if (fdirp) 2129 vrele(fdirp); 2130 #ifdef notdef 2131 if (tdirp) 2132 vrele(tdirp); 2133 #endif 2134 if (tond.ni_cnd.cn_nameiop) { 2135 if (tond.ni_pathbuf != NULL) { 2136 pathbuf_destroy(tond.ni_pathbuf); 2137 tond.ni_pathbuf = NULL; 2138 } 2139 } 2140 if (localfs) { 2141 VFS_RENAMELOCK_EXIT(localfs); 2142 } 2143 if (fromnd.ni_cnd.cn_nameiop) { 2144 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 2145 if (fromnd.ni_pathbuf != NULL) { 2146 pathbuf_destroy(fromnd.ni_pathbuf); 2147 fromnd.ni_pathbuf = NULL; 2148 } 2149 vrele(fromnd.ni_dvp); 2150 vrele(fvp); 2151 } 2152 return (error); 2153 } 2154 2155 /* 2156 * nfs link service 2157 */ 2158 int 2159 nfsrv_link(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 2160 { 2161 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2162 struct mbuf *nam = nfsd->nd_nam; 2163 char *dpos = nfsd->nd_dpos; 2164 kauth_cred_t cred = nfsd->nd_cr; 2165 struct nameidata nd; 2166 u_int32_t *tl; 2167 int32_t t1; 2168 char *bpos; 2169 int error = 0, rdonly, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 2170 int getret = 1, v3 = (nfsd->nd_flag & ND_NFSV3); 2171 char *cp2; 2172 struct mbuf *mb, *mreq; 2173 struct vnode *vp, *xp, *dirp = (struct vnode *)0; 2174 struct vattr dirfor, diraft, at; 2175 nfsrvfh_t nsfh, dnsfh; 2176 u_quad_t frev; 2177 2178 nfsm_srvmtofh(&nsfh); 2179 nfsm_srvmtofh(&dnsfh); 2180 nfsm_srvnamesiz(len); 2181 error = nfsrv_fhtovp(&nsfh, false, &vp, cred, slp, nam, 2182 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 2183 if (error) { 2184 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2185 nfsm_srvpostop_attr(getret, &at); 2186 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2187 return (0); 2188 } 2189 if (vp->v_type == VDIR) { 2190 error = EPERM; 2191 goto out1; 2192 } 2193 nd.ni_cnd.cn_cred = cred; 2194 nd.ni_cnd.cn_nameiop = CREATE; 2195 nd.ni_cnd.cn_flags = LOCKPARENT; 2196 error = nfs_namei(&nd, &dnsfh, len, slp, nam, &md, &dpos, 2197 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 2198 if (dirp && v3) { 2199 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); 2200 } 2201 if (error) 2202 goto out1; 2203 xp = nd.ni_vp; 2204 if (xp != NULL) { 2205 error = EEXIST; 2206 goto out; 2207 } 2208 xp = nd.ni_dvp; 2209 if (vp->v_mount != xp->v_mount) 2210 error = EXDEV; 2211 out: 2212 if (!error) { 2213 nqsrv_getl(vp, ND_WRITE); 2214 nqsrv_getl(xp, ND_WRITE); 2215 error = VOP_LINK(nd.ni_dvp, vp, &nd.ni_cnd); 2216 } else { 2217 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2218 if (nd.ni_dvp == nd.ni_vp) 2219 vrele(nd.ni_dvp); 2220 else 2221 vput(nd.ni_dvp); 2222 if (nd.ni_vp) 2223 vrele(nd.ni_vp); 2224 } 2225 out1: 2226 if (v3) { 2227 vn_lock(vp, LK_SHARED | LK_RETRY); 2228 getret = VOP_GETATTR(vp, &at, cred); 2229 VOP_UNLOCK(vp); 2230 } 2231 if (dirp) { 2232 if (v3) { 2233 vn_lock(dirp, LK_SHARED | LK_RETRY); 2234 diraft_ret = VOP_GETATTR(dirp, &diraft, cred); 2235 VOP_UNLOCK(dirp); 2236 } 2237 vrele(dirp); 2238 } 2239 vrele(vp); 2240 if (nd.ni_pathbuf != NULL) { 2241 pathbuf_destroy(nd.ni_pathbuf); 2242 nd.ni_pathbuf = NULL; 2243 } 2244 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2245 if (v3) { 2246 nfsm_srvpostop_attr(getret, &at); 2247 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2248 return (0); 2249 } 2250 nfsm_srvdone; 2251 } 2252 2253 /* 2254 * nfs symbolic link service 2255 */ 2256 int 2257 nfsrv_symlink(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 2258 { 2259 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2260 struct mbuf *nam = nfsd->nd_nam; 2261 char *dpos = nfsd->nd_dpos; 2262 kauth_cred_t cred = nfsd->nd_cr; 2263 struct vattr va, dirfor, diraft; 2264 struct nameidata nd; 2265 u_int32_t *tl; 2266 int32_t t1; 2267 struct nfsv2_sattr *sp; 2268 char *bpos, *pathcp = NULL, *cp2; 2269 struct uio io; 2270 struct iovec iv; 2271 int error = 0, cache = 0, dirfor_ret = 1, diraft_ret = 1, abort = 0; 2272 uint32_t len, len2; 2273 int v3 = (nfsd->nd_flag & ND_NFSV3); 2274 struct mbuf *mb, *mreq; 2275 struct vnode *dirp = (struct vnode *)0; 2276 nfsrvfh_t nsfh; 2277 u_quad_t frev; 2278 2279 nd.ni_cnd.cn_nameiop = 0; 2280 nfsm_srvmtofh(&nsfh); 2281 nfsm_srvnamesiz(len); 2282 nd.ni_cnd.cn_cred = cred; 2283 nd.ni_cnd.cn_nameiop = CREATE; 2284 nd.ni_cnd.cn_flags = LOCKPARENT; 2285 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 2286 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 2287 if (dirp && v3) { 2288 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); 2289 } 2290 if (error) 2291 goto out; 2292 abort = 1; 2293 vattr_null(&va); 2294 va.va_type = VLNK; 2295 if (v3) { 2296 va.va_mode = 0; 2297 nfsm_srvsattr(&va); 2298 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 2299 len2 = fxdr_unsigned(uint32_t, *tl); 2300 if (len2 > PATH_MAX) { 2301 /* XXX should check _PC_NO_TRUNC */ 2302 error = ENAMETOOLONG; 2303 goto abortop; 2304 } 2305 } 2306 else { 2307 /* NFSv2 */ 2308 nfsm_strsiz(len2, NFS_MAXPATHLEN); 2309 } 2310 pathcp = malloc(len2 + 1, M_TEMP, M_WAITOK); 2311 iv.iov_base = pathcp; 2312 iv.iov_len = len2; 2313 io.uio_resid = len2; 2314 io.uio_offset = 0; 2315 io.uio_iov = &iv; 2316 io.uio_iovcnt = 1; 2317 io.uio_rw = UIO_READ; 2318 UIO_SETUP_SYSSPACE(&io); 2319 nfsm_mtouio(&io, len2); 2320 if (!v3) { 2321 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2322 va.va_mode = fxdr_unsigned(u_int16_t, sp->sa_mode); 2323 } 2324 *(pathcp + len2) = '\0'; 2325 if (nd.ni_vp) { 2326 error = EEXIST; 2327 abortop: 2328 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2329 if (nd.ni_dvp == nd.ni_vp) 2330 vrele(nd.ni_dvp); 2331 else 2332 vput(nd.ni_dvp); 2333 if (nd.ni_vp) 2334 vrele(nd.ni_vp); 2335 goto out; 2336 } 2337 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2338 error = VOP_SYMLINK(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va, pathcp); 2339 if (!error) { 2340 if (v3) { 2341 error = nfsrv_composefh(nd.ni_vp, &nsfh, v3); 2342 if (!error) 2343 error = VOP_GETATTR(nd.ni_vp, &va, cred); 2344 vput(nd.ni_vp); 2345 } else { 2346 vput(nd.ni_vp); 2347 } 2348 } 2349 out: 2350 if (pathcp) 2351 free(pathcp, M_TEMP); 2352 if (dirp) { 2353 if (v3) { 2354 vn_lock(dirp, LK_SHARED | LK_RETRY); 2355 diraft_ret = VOP_GETATTR(dirp, &diraft, cred); 2356 VOP_UNLOCK(dirp); 2357 } 2358 vrele(dirp); 2359 dirp = NULL; 2360 } 2361 if (nd.ni_pathbuf != NULL) { 2362 pathbuf_destroy(nd.ni_pathbuf); 2363 nd.ni_pathbuf = NULL; 2364 } 2365 abort = 0; 2366 nfsm_reply(NFSX_SRVFH(&nsfh, v3) + NFSX_POSTOPATTR(v3) + 2367 NFSX_WCCDATA(v3)); 2368 if (v3) { 2369 if (!error) { 2370 nfsm_srvpostop_fh(&nsfh); 2371 nfsm_srvpostop_attr(0, &va); 2372 } 2373 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2374 } 2375 return (0); 2376 nfsmout: 2377 if (abort) { 2378 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2379 if (nd.ni_dvp == nd.ni_vp) 2380 vrele(nd.ni_dvp); 2381 else 2382 vput(nd.ni_dvp); 2383 if (nd.ni_vp) 2384 vrele(nd.ni_vp); 2385 if (nd.ni_pathbuf != NULL) { 2386 pathbuf_destroy(nd.ni_pathbuf); 2387 nd.ni_pathbuf = NULL; 2388 } 2389 } 2390 if (dirp) 2391 vrele(dirp); 2392 if (pathcp) 2393 free(pathcp, M_TEMP); 2394 return (error); 2395 } 2396 2397 /* 2398 * nfs mkdir service 2399 */ 2400 int 2401 nfsrv_mkdir(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 2402 { 2403 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2404 struct mbuf *nam = nfsd->nd_nam; 2405 char *dpos = nfsd->nd_dpos; 2406 kauth_cred_t cred = nfsd->nd_cr; 2407 struct vattr va, dirfor, diraft; 2408 struct nfs_fattr *fp; 2409 struct nameidata nd; 2410 char *cp; 2411 u_int32_t *tl; 2412 int32_t t1; 2413 char *bpos; 2414 int error = 0, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 2415 int abort = 0; 2416 int v3 = (nfsd->nd_flag & ND_NFSV3); 2417 char *cp2; 2418 struct mbuf *mb, *mreq; 2419 struct vnode *vp, *dirp = (struct vnode *)0; 2420 nfsrvfh_t nsfh; 2421 u_quad_t frev; 2422 2423 nfsm_srvmtofh(&nsfh); 2424 nfsm_srvnamesiz(len); 2425 nd.ni_cnd.cn_cred = cred; 2426 nd.ni_cnd.cn_nameiop = CREATE; 2427 nd.ni_cnd.cn_flags = LOCKPARENT; 2428 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 2429 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 2430 if (dirp && v3) { 2431 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); 2432 } 2433 if (error) { 2434 if (nd.ni_pathbuf != NULL) { 2435 pathbuf_destroy(nd.ni_pathbuf); 2436 nd.ni_pathbuf = NULL; 2437 } 2438 nfsm_reply(NFSX_WCCDATA(v3)); 2439 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2440 if (dirp) 2441 vrele(dirp); 2442 return (0); 2443 } 2444 abort = 1; 2445 vattr_null(&va); 2446 if (v3) { 2447 va.va_mode = 0; 2448 nfsm_srvsattr(&va); 2449 } else { 2450 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2451 va.va_mode = nfstov_mode(*tl++); 2452 } 2453 va.va_type = VDIR; 2454 vp = nd.ni_vp; 2455 if (vp != NULL) { 2456 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2457 if (nd.ni_dvp == vp) 2458 vrele(nd.ni_dvp); 2459 else 2460 vput(nd.ni_dvp); 2461 vrele(vp); 2462 error = EEXIST; 2463 goto out; 2464 } 2465 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2466 error = VOP_MKDIR(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 2467 if (!error) { 2468 vp = nd.ni_vp; 2469 error = nfsrv_composefh(vp, &nsfh, v3); 2470 if (!error) 2471 error = VOP_GETATTR(vp, &va, cred); 2472 vput(vp); 2473 } 2474 out: 2475 if (dirp) { 2476 if (v3) { 2477 vn_lock(dirp, LK_SHARED | LK_RETRY); 2478 diraft_ret = VOP_GETATTR(dirp, &diraft, cred); 2479 VOP_UNLOCK(dirp); 2480 } 2481 vrele(dirp); 2482 dirp = NULL; 2483 } 2484 if (nd.ni_pathbuf != NULL) { 2485 pathbuf_destroy(nd.ni_pathbuf); 2486 nd.ni_pathbuf = NULL; 2487 } 2488 abort = 0; 2489 nfsm_reply(NFSX_SRVFH(&nsfh, v3) + NFSX_POSTOPATTR(v3) + 2490 NFSX_WCCDATA(v3)); 2491 if (v3) { 2492 if (!error) { 2493 nfsm_srvpostop_fh(&nsfh); 2494 nfsm_srvpostop_attr(0, &va); 2495 } 2496 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2497 } else { 2498 nfsm_srvfhtom(&nsfh, v3); 2499 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 2500 nfsm_srvfillattr(&va, fp); 2501 } 2502 return (0); 2503 nfsmout: 2504 if (abort) { 2505 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2506 if (nd.ni_dvp == nd.ni_vp) 2507 vrele(nd.ni_dvp); 2508 else 2509 vput(nd.ni_dvp); 2510 if (nd.ni_vp) 2511 vrele(nd.ni_vp); 2512 if (nd.ni_pathbuf != NULL) { 2513 pathbuf_destroy(nd.ni_pathbuf); 2514 nd.ni_pathbuf = NULL; 2515 } 2516 } 2517 if (dirp) 2518 vrele(dirp); 2519 return (error); 2520 } 2521 2522 /* 2523 * nfs rmdir service 2524 */ 2525 int 2526 nfsrv_rmdir(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 2527 { 2528 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2529 struct mbuf *nam = nfsd->nd_nam; 2530 char *dpos = nfsd->nd_dpos; 2531 kauth_cred_t cred = nfsd->nd_cr; 2532 u_int32_t *tl; 2533 int32_t t1; 2534 char *bpos; 2535 int error = 0, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 2536 int v3 = (nfsd->nd_flag & ND_NFSV3); 2537 char *cp2; 2538 struct mbuf *mb, *mreq; 2539 struct vnode *vp, *dirp = (struct vnode *)0; 2540 struct vattr dirfor, diraft; 2541 nfsrvfh_t nsfh; 2542 struct nameidata nd; 2543 u_quad_t frev; 2544 2545 nfsm_srvmtofh(&nsfh); 2546 nfsm_srvnamesiz(len); 2547 nd.ni_cnd.cn_cred = cred; 2548 nd.ni_cnd.cn_nameiop = DELETE; 2549 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 2550 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 2551 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 2552 if (dirp && v3) { 2553 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); 2554 } 2555 if (error) { 2556 if (nd.ni_pathbuf != NULL) { 2557 pathbuf_destroy(nd.ni_pathbuf); 2558 nd.ni_pathbuf = NULL; 2559 } 2560 nfsm_reply(NFSX_WCCDATA(v3)); 2561 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2562 if (dirp) 2563 vrele(dirp); 2564 return (0); 2565 } 2566 vp = nd.ni_vp; 2567 if (vp->v_type != VDIR) { 2568 error = ENOTDIR; 2569 goto out; 2570 } 2571 /* 2572 * No rmdir "." please. 2573 */ 2574 if (nd.ni_dvp == vp) { 2575 error = EINVAL; 2576 goto out; 2577 } 2578 /* 2579 * The root of a mounted filesystem cannot be deleted. 2580 */ 2581 if (vp->v_vflag & VV_ROOT) 2582 error = EBUSY; 2583 out: 2584 if (!error) { 2585 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2586 nqsrv_getl(vp, ND_WRITE); 2587 error = VOP_RMDIR(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); 2588 } else { 2589 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2590 if (nd.ni_dvp == nd.ni_vp) 2591 vrele(nd.ni_dvp); 2592 else 2593 vput(nd.ni_dvp); 2594 vput(vp); 2595 } 2596 if (nd.ni_pathbuf != NULL) { 2597 pathbuf_destroy(nd.ni_pathbuf); 2598 nd.ni_pathbuf = NULL; 2599 } 2600 if (dirp) { 2601 if (v3) { 2602 vn_lock(dirp, LK_SHARED | LK_RETRY); 2603 diraft_ret = VOP_GETATTR(dirp, &diraft, cred); 2604 VOP_UNLOCK(dirp); 2605 } 2606 vrele(dirp); 2607 } 2608 nfsm_reply(NFSX_WCCDATA(v3)); 2609 if (v3) { 2610 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2611 return (0); 2612 } 2613 nfsm_srvdone; 2614 } 2615 2616 /* 2617 * nfs readdir service 2618 * - mallocs what it thinks is enough to read 2619 * count rounded up to a multiple of NFS_SRVDIRBLKSIZ <= NFS_MAXREADDIR 2620 * - calls VOP_READDIR() 2621 * - loops around building the reply 2622 * if the output generated exceeds count break out of loop 2623 * The nfsm_clget macro is used here so that the reply will be packed 2624 * tightly in mbuf clusters. 2625 * - it only knows that it has encountered eof when the VOP_READDIR() 2626 * reads nothing 2627 * - as such one readdir rpc will return eof false although you are there 2628 * and then the next will return eof 2629 * - it trims out records with d_fileno == 0 2630 * this doesn't matter for Unix clients, but they might confuse clients 2631 * for other os'. 2632 * - it trims out records with d_type == DT_WHT 2633 * these cannot be seen through NFS (unless we extend the protocol) 2634 * NB: It is tempting to set eof to true if the VOP_READDIR() reads less 2635 * than requested, but this may not apply to all filesystems. For 2636 * example, client NFS does not { although it is never remote mounted 2637 * anyhow } 2638 * The alternate call nfsrv_readdirplus() does lookups as well. 2639 * PS: The NFS protocol spec. does not clarify what the "count" byte 2640 * argument is a count of.. just name strings and file id's or the 2641 * entire reply rpc or ... 2642 * I tried just file name and id sizes and it confused the Sun client, 2643 * so I am using the full rpc size now. The "paranoia.." comment refers 2644 * to including the status longwords that are not a part of the dir. 2645 * "entry" structures, but are in the rpc. 2646 */ 2647 2648 #define NFS_SRVDIRBLKSIZ 1024 2649 2650 struct flrep { 2651 nfsuint64 fl_off; 2652 u_int32_t fl_postopok; 2653 struct nfs_fattr fl_fattr; /* XXX: must be of fattr3 size */ 2654 u_int32_t fl_fhok; 2655 u_int32_t fl_fhsize; 2656 /* handle comes here, filled in dynamically */ 2657 }; 2658 2659 int 2660 nfsrv_readdir(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 2661 { 2662 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2663 struct mbuf *nam = nfsd->nd_nam; 2664 char *dpos = nfsd->nd_dpos; 2665 kauth_cred_t cred = nfsd->nd_cr; 2666 char *bp, *be; 2667 struct mbuf *mp; 2668 struct dirent *dp; 2669 char *cp; 2670 u_int32_t *tl; 2671 int32_t t1; 2672 char *bpos; 2673 struct mbuf *mb, *mreq, *mp2; 2674 char *cpos, *cend, *cp2, *rbuf; 2675 struct vnode *vp; 2676 struct vattr at; 2677 nfsrvfh_t nsfh; 2678 struct uio io; 2679 struct iovec iv; 2680 int len, nlen, rem, xfer, tsiz, i, error = 0, getret = 1; 2681 int siz, cnt, fullsiz, eofflag, rdonly, cache = 0, ncookies; 2682 int v3 = (nfsd->nd_flag & ND_NFSV3); 2683 u_quad_t frev, off, toff, verf; 2684 off_t *cookies = NULL, *cookiep; 2685 nfsuint64 jar; 2686 2687 nfsm_srvmtofh(&nsfh); 2688 if (v3) { 2689 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 2690 toff = fxdr_hyper(tl); 2691 tl += 2; 2692 verf = fxdr_hyper(tl); 2693 tl += 2; 2694 } else { 2695 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2696 toff = fxdr_unsigned(u_quad_t, *tl++); 2697 } 2698 off = toff; 2699 cnt = fxdr_unsigned(int, *tl); 2700 siz = ((cnt + NFS_SRVDIRBLKSIZ - 1) & ~(NFS_SRVDIRBLKSIZ - 1)); 2701 xfer = NFS_SRVMAXDATA(nfsd); 2702 if (siz > xfer) 2703 siz = xfer; 2704 fullsiz = siz; 2705 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 2706 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 2707 if (!error && vp->v_type != VDIR) { 2708 error = ENOTDIR; 2709 vput(vp); 2710 } 2711 if (error) { 2712 nfsm_reply(NFSX_UNSIGNED); 2713 nfsm_srvpostop_attr(getret, &at); 2714 return (0); 2715 } 2716 nqsrv_getl(vp, ND_READ); 2717 if (v3) { 2718 error = getret = VOP_GETATTR(vp, &at, cred); 2719 #ifdef NFS3_STRICTVERF 2720 /* 2721 * XXX This check is too strict for Solaris 2.5 clients. 2722 */ 2723 if (!error && toff && verf != at.va_filerev) 2724 error = NFSERR_BAD_COOKIE; 2725 #endif 2726 } 2727 if (!error) 2728 error = nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 0); 2729 if (error) { 2730 vput(vp); 2731 nfsm_reply(NFSX_POSTOPATTR(v3)); 2732 nfsm_srvpostop_attr(getret, &at); 2733 return (0); 2734 } 2735 VOP_UNLOCK(vp); 2736 rbuf = malloc(siz, M_TEMP, M_WAITOK); 2737 again: 2738 iv.iov_base = rbuf; 2739 iv.iov_len = fullsiz; 2740 io.uio_iov = &iv; 2741 io.uio_iovcnt = 1; 2742 io.uio_offset = (off_t)off; 2743 io.uio_resid = fullsiz; 2744 io.uio_rw = UIO_READ; 2745 UIO_SETUP_SYSSPACE(&io); 2746 eofflag = 0; 2747 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2748 2749 error = VOP_READDIR(vp, &io, cred, &eofflag, &cookies, &ncookies); 2750 2751 off = (off_t)io.uio_offset; 2752 if (!cookies && !error) 2753 error = NFSERR_PERM; 2754 if (v3) { 2755 getret = VOP_GETATTR(vp, &at, cred); 2756 if (!error) 2757 error = getret; 2758 } 2759 2760 VOP_UNLOCK(vp); 2761 if (error) { 2762 vrele(vp); 2763 free((void *)rbuf, M_TEMP); 2764 if (cookies) 2765 free((void *)cookies, M_TEMP); 2766 nfsm_reply(NFSX_POSTOPATTR(v3)); 2767 nfsm_srvpostop_attr(getret, &at); 2768 return (0); 2769 } 2770 if (io.uio_resid) { 2771 siz -= io.uio_resid; 2772 2773 /* 2774 * If nothing read, return eof 2775 * rpc reply 2776 */ 2777 if (siz == 0) { 2778 vrele(vp); 2779 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_COOKIEVERF(v3) + 2780 2 * NFSX_UNSIGNED); 2781 if (v3) { 2782 nfsm_srvpostop_attr(getret, &at); 2783 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 2784 txdr_hyper(at.va_filerev, tl); 2785 tl += 2; 2786 } else 2787 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2788 *tl++ = nfs_false; 2789 *tl = nfs_true; 2790 free((void *)rbuf, M_TEMP); 2791 free((void *)cookies, M_TEMP); 2792 return (0); 2793 } 2794 } 2795 2796 /* 2797 * Check for degenerate cases of nothing useful read. 2798 * If so go try again 2799 */ 2800 cpos = rbuf; 2801 cend = rbuf + siz; 2802 dp = (struct dirent *)cpos; 2803 cookiep = cookies; 2804 2805 while (cpos < cend && ncookies > 0 && 2806 (dp->d_fileno == 0 || dp->d_type == DT_WHT)) { 2807 cpos += dp->d_reclen; 2808 dp = (struct dirent *)cpos; 2809 cookiep++; 2810 ncookies--; 2811 } 2812 if (cpos >= cend || ncookies == 0) { 2813 toff = off; 2814 siz = fullsiz; 2815 free(cookies, M_TEMP); 2816 cookies = NULL; 2817 goto again; 2818 } 2819 2820 len = 3 * NFSX_UNSIGNED; /* paranoia, probably can be 0 */ 2821 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_COOKIEVERF(v3) + siz); 2822 if (v3) { 2823 nfsm_srvpostop_attr(getret, &at); 2824 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2825 txdr_hyper(at.va_filerev, tl); 2826 } 2827 mp = mp2 = mb; 2828 bp = bpos; 2829 be = bp + M_TRAILINGSPACE(mp); 2830 2831 /* Loop through the records and build reply */ 2832 while (cpos < cend && ncookies > 0) { 2833 if (dp->d_fileno != 0 && dp->d_type != DT_WHT) { 2834 nlen = dp->d_namlen; 2835 rem = nfsm_rndup(nlen)-nlen; 2836 len += (4 * NFSX_UNSIGNED + nlen + rem); 2837 if (v3) 2838 len += 2 * NFSX_UNSIGNED; 2839 if (len > cnt) { 2840 eofflag = 0; 2841 break; 2842 } 2843 /* 2844 * Build the directory record xdr from 2845 * the dirent entry. 2846 */ 2847 nfsm_clget; 2848 *tl = nfs_true; 2849 bp += NFSX_UNSIGNED; 2850 if (v3) { 2851 nfsm_clget; 2852 *tl = txdr_unsigned(dp->d_fileno >> 32); 2853 bp += NFSX_UNSIGNED; 2854 } 2855 nfsm_clget; 2856 *tl = txdr_unsigned(dp->d_fileno); 2857 bp += NFSX_UNSIGNED; 2858 nfsm_clget; 2859 *tl = txdr_unsigned(nlen); 2860 bp += NFSX_UNSIGNED; 2861 2862 /* And loop around copying the name */ 2863 xfer = nlen; 2864 cp = dp->d_name; 2865 while (xfer > 0) { 2866 nfsm_clget; 2867 if ((bp+xfer) > be) 2868 tsiz = be-bp; 2869 else 2870 tsiz = xfer; 2871 memcpy(bp, cp, tsiz); 2872 bp += tsiz; 2873 xfer -= tsiz; 2874 if (xfer > 0) 2875 cp += tsiz; 2876 } 2877 /* And null pad to an int32_t boundary */ 2878 for (i = 0; i < rem; i++) 2879 *bp++ = '\0'; 2880 nfsm_clget; 2881 2882 /* Finish off the record */ 2883 txdr_hyper(*cookiep, &jar); 2884 if (v3) { 2885 *tl = jar.nfsuquad[0]; 2886 bp += NFSX_UNSIGNED; 2887 nfsm_clget; 2888 } 2889 *tl = jar.nfsuquad[1]; 2890 bp += NFSX_UNSIGNED; 2891 } 2892 cpos += dp->d_reclen; 2893 dp = (struct dirent *)cpos; 2894 cookiep++; 2895 ncookies--; 2896 } 2897 vrele(vp); 2898 nfsm_clget; 2899 *tl = nfs_false; 2900 bp += NFSX_UNSIGNED; 2901 nfsm_clget; 2902 if (eofflag) 2903 *tl = nfs_true; 2904 else 2905 *tl = nfs_false; 2906 bp += NFSX_UNSIGNED; 2907 if (mp != mb) { 2908 if (bp < be) 2909 mp->m_len = bp - mtod(mp, char *); 2910 } else 2911 mp->m_len += bp - bpos; 2912 free((void *)rbuf, M_TEMP); 2913 free((void *)cookies, M_TEMP); 2914 nfsm_srvdone; 2915 } 2916 2917 int 2918 nfsrv_readdirplus(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 2919 { 2920 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2921 struct mbuf *nam = nfsd->nd_nam; 2922 char *dpos = nfsd->nd_dpos; 2923 kauth_cred_t cred = nfsd->nd_cr; 2924 char *bp, *be; 2925 struct mbuf *mp; 2926 struct dirent *dp; 2927 char *cp; 2928 u_int32_t *tl; 2929 int32_t t1; 2930 char *bpos; 2931 struct mbuf *mb, *mreq, *mp2; 2932 char *cpos, *cend, *cp2, *rbuf; 2933 struct vnode *vp, *nvp; 2934 struct flrep fl; 2935 nfsrvfh_t nsfh; 2936 struct uio io; 2937 struct iovec iv; 2938 struct vattr va, at, *vap = &va; 2939 struct nfs_fattr *fp; 2940 int len, nlen, rem, xfer, tsiz, i, error = 0, getret = 1; 2941 int siz, cnt, fullsiz, eofflag, rdonly, cache = 0, dirlen, ncookies; 2942 u_quad_t frev, off, toff, verf; 2943 off_t *cookies = NULL, *cookiep; 2944 2945 nfsm_srvmtofh(&nsfh); 2946 nfsm_dissect(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 2947 toff = fxdr_hyper(tl); 2948 tl += 2; 2949 verf = fxdr_hyper(tl); 2950 tl += 2; 2951 siz = fxdr_unsigned(int, *tl++); 2952 cnt = fxdr_unsigned(int, *tl); 2953 off = toff; 2954 siz = ((siz + NFS_SRVDIRBLKSIZ - 1) & ~(NFS_SRVDIRBLKSIZ - 1)); 2955 xfer = NFS_SRVMAXDATA(nfsd); 2956 if (siz > xfer) 2957 siz = xfer; 2958 fullsiz = siz; 2959 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 2960 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 2961 if (!error && vp->v_type != VDIR) { 2962 error = ENOTDIR; 2963 vput(vp); 2964 } 2965 if (error) { 2966 nfsm_reply(NFSX_UNSIGNED); 2967 nfsm_srvpostop_attr(getret, &at); 2968 return (0); 2969 } 2970 error = getret = VOP_GETATTR(vp, &at, cred); 2971 #ifdef NFS3_STRICTVERF 2972 /* 2973 * XXX This check is too strict for Solaris 2.5 clients. 2974 */ 2975 if (!error && toff && verf != at.va_filerev) 2976 error = NFSERR_BAD_COOKIE; 2977 #endif 2978 if (!error) { 2979 nqsrv_getl(vp, ND_READ); 2980 error = nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 0); 2981 } 2982 if (error) { 2983 vput(vp); 2984 nfsm_reply(NFSX_V3POSTOPATTR); 2985 nfsm_srvpostop_attr(getret, &at); 2986 return (0); 2987 } 2988 VOP_UNLOCK(vp); 2989 2990 rbuf = malloc(siz, M_TEMP, M_WAITOK); 2991 again: 2992 iv.iov_base = rbuf; 2993 iv.iov_len = fullsiz; 2994 io.uio_iov = &iv; 2995 io.uio_iovcnt = 1; 2996 io.uio_offset = (off_t)off; 2997 io.uio_resid = fullsiz; 2998 io.uio_rw = UIO_READ; 2999 UIO_SETUP_SYSSPACE(&io); 3000 eofflag = 0; 3001 3002 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 3003 3004 error = VOP_READDIR(vp, &io, cred, &eofflag, &cookies, &ncookies); 3005 3006 off = (u_quad_t)io.uio_offset; 3007 getret = VOP_GETATTR(vp, &at, cred); 3008 3009 VOP_UNLOCK(vp); 3010 3011 /* 3012 * If the VGET operation doesn't work for this filesystem, 3013 * we can't support readdirplus. Returning NOTSUPP should 3014 * make clients fall back to plain readdir. 3015 * There's no need to check for VPTOFH as well, we wouldn't 3016 * even be here otherwise. 3017 */ 3018 if (!getret) { 3019 if ((getret = VFS_VGET(vp->v_mount, at.va_fileid, &nvp))) 3020 getret = (getret == EOPNOTSUPP) ? 3021 NFSERR_NOTSUPP : NFSERR_IO; 3022 else 3023 vput(nvp); 3024 } 3025 3026 if (!cookies && !error) 3027 error = NFSERR_PERM; 3028 if (!error) 3029 error = getret; 3030 if (error) { 3031 vrele(vp); 3032 if (cookies) 3033 free((void *)cookies, M_TEMP); 3034 free((void *)rbuf, M_TEMP); 3035 nfsm_reply(NFSX_V3POSTOPATTR); 3036 nfsm_srvpostop_attr(getret, &at); 3037 return (0); 3038 } 3039 if (io.uio_resid) { 3040 siz -= io.uio_resid; 3041 3042 /* 3043 * If nothing read, return eof 3044 * rpc reply 3045 */ 3046 if (siz == 0) { 3047 vrele(vp); 3048 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF + 3049 2 * NFSX_UNSIGNED); 3050 nfsm_srvpostop_attr(getret, &at); 3051 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 3052 txdr_hyper(at.va_filerev, tl); 3053 tl += 2; 3054 *tl++ = nfs_false; 3055 *tl = nfs_true; 3056 free((void *)cookies, M_TEMP); 3057 free((void *)rbuf, M_TEMP); 3058 return (0); 3059 } 3060 } 3061 3062 /* 3063 * Check for degenerate cases of nothing useful read. 3064 * If so go try again 3065 */ 3066 cpos = rbuf; 3067 cend = rbuf + siz; 3068 dp = (struct dirent *)cpos; 3069 cookiep = cookies; 3070 3071 while (cpos < cend && ncookies > 0 && 3072 (dp->d_fileno == 0 || dp->d_type == DT_WHT)) { 3073 cpos += dp->d_reclen; 3074 dp = (struct dirent *)cpos; 3075 cookiep++; 3076 ncookies--; 3077 } 3078 if (cpos >= cend || ncookies == 0) { 3079 toff = off; 3080 siz = fullsiz; 3081 free(cookies, M_TEMP); 3082 cookies = NULL; 3083 goto again; 3084 } 3085 3086 dirlen = len = NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF + 2 * NFSX_UNSIGNED; 3087 nfsm_reply(cnt); 3088 nfsm_srvpostop_attr(getret, &at); 3089 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 3090 txdr_hyper(at.va_filerev, tl); 3091 mp = mp2 = mb; 3092 bp = bpos; 3093 be = bp + M_TRAILINGSPACE(mp); 3094 3095 /* Loop through the records and build reply */ 3096 while (cpos < cend && ncookies > 0) { 3097 if (dp->d_fileno != 0 && dp->d_type != DT_WHT) { 3098 nfsrvfh_t nnsfh; 3099 3100 nlen = dp->d_namlen; 3101 rem = nfsm_rndup(nlen)-nlen; 3102 3103 /* 3104 * For readdir_and_lookup get the vnode using 3105 * the file number. 3106 */ 3107 if (VFS_VGET(vp->v_mount, dp->d_fileno, &nvp)) 3108 goto invalid; 3109 if (nfsrv_composefh(nvp, &nnsfh, true)) { 3110 vput(nvp); 3111 goto invalid; 3112 } 3113 if (VOP_GETATTR(nvp, vap, cred)) { 3114 vput(nvp); 3115 goto invalid; 3116 } 3117 vput(nvp); 3118 3119 /* 3120 * If either the dircount or maxcount will be 3121 * exceeded, get out now. Both of these lengths 3122 * are calculated conservatively, including all 3123 * XDR overheads. 3124 */ 3125 len += (8 * NFSX_UNSIGNED + nlen + rem + NFSX_V3FH + 3126 NFSX_V3POSTOPATTR); 3127 dirlen += (6 * NFSX_UNSIGNED + nlen + rem); 3128 if (len > cnt || dirlen > fullsiz) { 3129 eofflag = 0; 3130 break; 3131 } 3132 3133 /* 3134 * Build the directory record xdr from 3135 * the dirent entry. 3136 */ 3137 fp = (struct nfs_fattr *)&fl.fl_fattr; 3138 nfsm_srvfillattr(vap, fp); 3139 fl.fl_fhsize = txdr_unsigned(NFSX_V3FH); 3140 fl.fl_fhok = nfs_true; 3141 fl.fl_postopok = nfs_true; 3142 txdr_hyper(*cookiep, fl.fl_off.nfsuquad); 3143 3144 nfsm_clget; 3145 *tl = nfs_true; 3146 bp += NFSX_UNSIGNED; 3147 nfsm_clget; 3148 *tl = txdr_unsigned(dp->d_fileno >> 32); 3149 bp += NFSX_UNSIGNED; 3150 nfsm_clget; 3151 *tl = txdr_unsigned(dp->d_fileno); 3152 bp += NFSX_UNSIGNED; 3153 nfsm_clget; 3154 *tl = txdr_unsigned(nlen); 3155 bp += NFSX_UNSIGNED; 3156 3157 /* And loop around copying the name */ 3158 xfer = nlen; 3159 cp = dp->d_name; 3160 while (xfer > 0) { 3161 nfsm_clget; 3162 if ((bp + xfer) > be) 3163 tsiz = be - bp; 3164 else 3165 tsiz = xfer; 3166 memcpy(bp, cp, tsiz); 3167 bp += tsiz; 3168 xfer -= tsiz; 3169 if (xfer > 0) 3170 cp += tsiz; 3171 } 3172 /* And null pad to an int32_t boundary */ 3173 for (i = 0; i < rem; i++) 3174 *bp++ = '\0'; 3175 3176 /* 3177 * Now copy the flrep structure out. 3178 */ 3179 xfer = sizeof(struct flrep); 3180 cp = (void *)&fl; 3181 while (xfer > 0) { 3182 nfsm_clget; 3183 if ((bp + xfer) > be) 3184 tsiz = be - bp; 3185 else 3186 tsiz = xfer; 3187 memcpy(bp, cp, tsiz); 3188 bp += tsiz; 3189 xfer -= tsiz; 3190 if (xfer > 0) 3191 cp += tsiz; 3192 } 3193 3194 /* 3195 * ... and filehandle. 3196 */ 3197 xfer = NFSRVFH_SIZE(&nnsfh); 3198 cp = NFSRVFH_DATA(&nnsfh); 3199 while (xfer > 0) { 3200 nfsm_clget; 3201 if ((bp + xfer) > be) 3202 tsiz = be - bp; 3203 else 3204 tsiz = xfer; 3205 memcpy(bp, cp, tsiz); 3206 bp += tsiz; 3207 xfer -= tsiz; 3208 if (xfer > 0) 3209 cp += tsiz; 3210 } 3211 } 3212 invalid: 3213 cpos += dp->d_reclen; 3214 dp = (struct dirent *)cpos; 3215 cookiep++; 3216 ncookies--; 3217 } 3218 vrele(vp); 3219 nfsm_clget; 3220 *tl = nfs_false; 3221 bp += NFSX_UNSIGNED; 3222 nfsm_clget; 3223 if (eofflag) 3224 *tl = nfs_true; 3225 else 3226 *tl = nfs_false; 3227 bp += NFSX_UNSIGNED; 3228 if (mp != mb) { 3229 if (bp < be) 3230 mp->m_len = bp - mtod(mp, char *); 3231 } else 3232 mp->m_len += bp - bpos; 3233 free((void *)cookies, M_TEMP); 3234 free((void *)rbuf, M_TEMP); 3235 nfsm_srvdone; 3236 } 3237 3238 /* 3239 * nfs commit service 3240 */ 3241 int 3242 nfsrv_commit(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 3243 { 3244 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3245 struct mbuf *nam = nfsd->nd_nam; 3246 char *dpos = nfsd->nd_dpos; 3247 kauth_cred_t cred = nfsd->nd_cr; 3248 struct vattr bfor, aft; 3249 struct vnode *vp; 3250 nfsrvfh_t nsfh; 3251 u_int32_t *tl; 3252 int32_t t1; 3253 char *bpos; 3254 int error = 0, rdonly, for_ret = 1, aft_ret = 1, cache = 0; 3255 uint32_t cnt; 3256 char *cp2; 3257 struct mbuf *mb, *mreq; 3258 u_quad_t frev, off, end; 3259 3260 nfsm_srvmtofh(&nsfh); 3261 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 3262 3263 off = fxdr_hyper(tl); 3264 tl += 2; 3265 cnt = fxdr_unsigned(uint32_t, *tl); 3266 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 3267 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 3268 if (error) { 3269 nfsm_reply(2 * NFSX_UNSIGNED); 3270 nfsm_srvwcc_data(for_ret, &bfor, aft_ret, &aft); 3271 return (0); 3272 } 3273 for_ret = VOP_GETATTR(vp, &bfor, cred); 3274 end = (cnt > 0) ? off + cnt : vp->v_size; 3275 if (end < off || end > vp->v_size) 3276 end = vp->v_size; 3277 if (off < vp->v_size) 3278 error = VOP_FSYNC(vp, cred, FSYNC_WAIT, off, end); 3279 /* else error == 0, from nfsrv_fhtovp() */ 3280 aft_ret = VOP_GETATTR(vp, &aft, cred); 3281 vput(vp); 3282 nfsm_reply(NFSX_V3WCCDATA + NFSX_V3WRITEVERF); 3283 nfsm_srvwcc_data(for_ret, &bfor, aft_ret, &aft); 3284 if (!error) { 3285 nfsm_build(tl, u_int32_t *, NFSX_V3WRITEVERF); 3286 *tl++ = txdr_unsigned(boottime.tv_sec); 3287 *tl = txdr_unsigned(boottime.tv_nsec / 1000); 3288 } else { 3289 return (0); 3290 } 3291 nfsm_srvdone; 3292 } 3293 3294 /* 3295 * nfs statfs service 3296 */ 3297 int 3298 nfsrv_statfs(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 3299 { 3300 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3301 struct mbuf *nam = nfsd->nd_nam; 3302 char *dpos = nfsd->nd_dpos; 3303 kauth_cred_t cred = nfsd->nd_cr; 3304 struct statvfs *sf = NULL; 3305 struct nfs_statfs *sfp; 3306 u_int32_t *tl; 3307 int32_t t1; 3308 char *bpos; 3309 int error = 0, rdonly, cache = 0, getret = 1; 3310 int v3 = (nfsd->nd_flag & ND_NFSV3); 3311 char *cp2; 3312 struct mbuf *mb, *mreq; 3313 struct vnode *vp; 3314 struct vattr at; 3315 nfsrvfh_t nsfh; 3316 u_quad_t frev, tval; 3317 3318 nfsm_srvmtofh(&nsfh); 3319 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 3320 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 3321 if (error) { 3322 nfsm_reply(NFSX_UNSIGNED); 3323 nfsm_srvpostop_attr(getret, &at); 3324 return (0); 3325 } 3326 sf = malloc(sizeof(*sf), M_TEMP, M_WAITOK); 3327 error = VFS_STATVFS(vp->v_mount, sf); 3328 getret = VOP_GETATTR(vp, &at, cred); 3329 vput(vp); 3330 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_STATFS(v3)); 3331 if (v3) 3332 nfsm_srvpostop_attr(getret, &at); 3333 if (error) { 3334 free(sf, M_TEMP); 3335 return (0); 3336 } 3337 nfsm_build(sfp, struct nfs_statfs *, NFSX_STATFS(v3)); 3338 if (v3) { 3339 tval = (u_quad_t)((quad_t)sf->f_blocks * (quad_t)sf->f_frsize); 3340 txdr_hyper(tval, &sfp->sf_tbytes); 3341 tval = (u_quad_t)((quad_t)sf->f_bfree * (quad_t)sf->f_frsize); 3342 txdr_hyper(tval, &sfp->sf_fbytes); 3343 tval = (u_quad_t)((quad_t)sf->f_bavail * (quad_t)sf->f_frsize); 3344 txdr_hyper(tval, &sfp->sf_abytes); 3345 tval = (u_quad_t)sf->f_files; 3346 txdr_hyper(tval, &sfp->sf_tfiles); 3347 tval = (u_quad_t)sf->f_ffree; 3348 txdr_hyper(tval, &sfp->sf_ffiles); 3349 txdr_hyper(tval, &sfp->sf_afiles); 3350 sfp->sf_invarsec = 0; 3351 } else { 3352 sfp->sf_tsize = txdr_unsigned(NFS_MAXDGRAMDATA); 3353 sfp->sf_bsize = txdr_unsigned(sf->f_frsize); 3354 sfp->sf_blocks = txdr_unsigned(sf->f_blocks); 3355 sfp->sf_bfree = txdr_unsigned(sf->f_bfree); 3356 sfp->sf_bavail = txdr_unsigned(sf->f_bavail); 3357 } 3358 nfsmout: 3359 if (sf) 3360 free(sf, M_TEMP); 3361 return error; 3362 } 3363 3364 /* 3365 * nfs fsinfo service 3366 */ 3367 int 3368 nfsrv_fsinfo(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 3369 { 3370 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3371 struct mbuf *nam = nfsd->nd_nam; 3372 char *dpos = nfsd->nd_dpos; 3373 kauth_cred_t cred = nfsd->nd_cr; 3374 u_int32_t *tl; 3375 struct nfsv3_fsinfo *sip; 3376 int32_t t1; 3377 char *bpos; 3378 int error = 0, rdonly, cache = 0, getret = 1; 3379 uint32_t maxdata; 3380 char *cp2; 3381 struct mbuf *mb, *mreq; 3382 struct vnode *vp; 3383 struct vattr at; 3384 nfsrvfh_t nsfh; 3385 u_quad_t frev, maxfsize; 3386 struct statvfs *sb; 3387 3388 nfsm_srvmtofh(&nsfh); 3389 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 3390 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 3391 if (error) { 3392 nfsm_reply(NFSX_UNSIGNED); 3393 nfsm_srvpostop_attr(getret, &at); 3394 return (0); 3395 } 3396 3397 /* XXX Try to make a guess on the max file size. */ 3398 sb = malloc(sizeof(*sb), M_TEMP, M_WAITOK); 3399 VFS_STATVFS(vp->v_mount, sb); 3400 maxfsize = (u_quad_t)0x80000000 * sb->f_frsize - 1; 3401 free(sb, M_TEMP); 3402 3403 getret = VOP_GETATTR(vp, &at, cred); 3404 vput(vp); 3405 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3FSINFO); 3406 nfsm_srvpostop_attr(getret, &at); 3407 nfsm_build(sip, struct nfsv3_fsinfo *, NFSX_V3FSINFO); 3408 3409 /* 3410 * XXX 3411 * There should be file system VFS OP(s) to get this information. 3412 * For now, assume ufs. 3413 */ 3414 if (slp->ns_so->so_type == SOCK_DGRAM) 3415 maxdata = NFS_MAXDGRAMDATA; 3416 else 3417 maxdata = NFS_MAXDATA; 3418 sip->fs_rtmax = txdr_unsigned(maxdata); 3419 sip->fs_rtpref = txdr_unsigned(maxdata); 3420 sip->fs_rtmult = txdr_unsigned(NFS_FABLKSIZE); 3421 sip->fs_wtmax = txdr_unsigned(maxdata); 3422 sip->fs_wtpref = txdr_unsigned(maxdata); 3423 sip->fs_wtmult = txdr_unsigned(NFS_FABLKSIZE); 3424 sip->fs_dtpref = txdr_unsigned(maxdata); 3425 txdr_hyper(maxfsize, &sip->fs_maxfilesize); 3426 sip->fs_timedelta.nfsv3_sec = 0; 3427 sip->fs_timedelta.nfsv3_nsec = txdr_unsigned(1); 3428 sip->fs_properties = txdr_unsigned(NFSV3FSINFO_LINK | 3429 NFSV3FSINFO_SYMLINK | NFSV3FSINFO_HOMOGENEOUS | 3430 NFSV3FSINFO_CANSETTIME); 3431 nfsm_srvdone; 3432 } 3433 3434 /* 3435 * nfs pathconf service 3436 */ 3437 int 3438 nfsrv_pathconf(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 3439 { 3440 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3441 struct mbuf *nam = nfsd->nd_nam; 3442 char *dpos = nfsd->nd_dpos; 3443 kauth_cred_t cred = nfsd->nd_cr; 3444 u_int32_t *tl; 3445 struct nfsv3_pathconf *pc; 3446 int32_t t1; 3447 char *bpos; 3448 int error = 0, rdonly, cache = 0, getret = 1; 3449 register_t linkmax, namemax, chownres, notrunc; 3450 char *cp2; 3451 struct mbuf *mb, *mreq; 3452 struct vnode *vp; 3453 struct vattr at; 3454 nfsrvfh_t nsfh; 3455 u_quad_t frev; 3456 3457 nfsm_srvmtofh(&nsfh); 3458 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 3459 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 3460 if (error) { 3461 nfsm_reply(NFSX_UNSIGNED); 3462 nfsm_srvpostop_attr(getret, &at); 3463 return (0); 3464 } 3465 error = VOP_PATHCONF(vp, _PC_LINK_MAX, &linkmax); 3466 if (!error) 3467 error = VOP_PATHCONF(vp, _PC_NAME_MAX, &namemax); 3468 if (!error) 3469 error = VOP_PATHCONF(vp, _PC_CHOWN_RESTRICTED, &chownres); 3470 if (!error) 3471 error = VOP_PATHCONF(vp, _PC_NO_TRUNC, ¬runc); 3472 getret = VOP_GETATTR(vp, &at, cred); 3473 vput(vp); 3474 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3PATHCONF); 3475 nfsm_srvpostop_attr(getret, &at); 3476 if (error) 3477 return (0); 3478 nfsm_build(pc, struct nfsv3_pathconf *, NFSX_V3PATHCONF); 3479 3480 pc->pc_linkmax = txdr_unsigned(linkmax); 3481 pc->pc_namemax = txdr_unsigned(namemax); 3482 pc->pc_notrunc = txdr_unsigned(notrunc); 3483 pc->pc_chownrestricted = txdr_unsigned(chownres); 3484 3485 /* 3486 * These should probably be supported by VOP_PATHCONF(), but 3487 * until msdosfs is exportable (why would you want to?), the 3488 * Unix defaults should be ok. 3489 */ 3490 pc->pc_caseinsensitive = nfs_false; 3491 pc->pc_casepreserving = nfs_true; 3492 nfsm_srvdone; 3493 } 3494 3495 /* 3496 * Null operation, used by clients to ping server 3497 */ 3498 /* ARGSUSED */ 3499 int 3500 nfsrv_null(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, 3501 struct lwp *lwp, struct mbuf **mrq) 3502 { 3503 struct mbuf *mrep = nfsd->nd_mrep; 3504 char *bpos; 3505 int error = NFSERR_RETVOID, cache = 0; 3506 struct mbuf *mb, *mreq; 3507 u_quad_t frev; 3508 3509 nfsm_reply(0); 3510 nfsmout: 3511 return (0); 3512 } 3513 3514 /* 3515 * No operation, used for obsolete procedures 3516 */ 3517 /* ARGSUSED */ 3518 int 3519 nfsrv_noop(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, 3520 struct lwp *lwp, struct mbuf **mrq) 3521 { 3522 struct mbuf *mrep = nfsd->nd_mrep; 3523 char *bpos; 3524 int error, cache = 0; 3525 struct mbuf *mb, *mreq; 3526 u_quad_t frev; 3527 3528 if (nfsd->nd_repstat) 3529 error = nfsd->nd_repstat; 3530 else 3531 error = EPROCUNAVAIL; 3532 nfsm_reply(0); 3533 nfsmout: 3534 return (0); 3535 } 3536 3537 /* 3538 * Perform access checking for vnodes obtained from file handles that would 3539 * refer to files already opened by a Unix client. You cannot just use 3540 * vn_writechk() and VOP_ACCESS() for two reasons. 3541 * 1 - You must check for exported rdonly as well as MNT_RDONLY for the write case 3542 * 2 - The owner is to be given access irrespective of mode bits for some 3543 * operations, so that processes that chmod after opening a file don't 3544 * break. I don't like this because it opens a security hole, but since 3545 * the nfs server opens a security hole the size of a barn door anyhow, 3546 * what the heck. 3547 * 3548 * The exception to rule 2 is EPERM. If a file is IMMUTABLE, VOP_ACCESS() 3549 * will return EPERM instead of EACCES. EPERM is always an error. 3550 */ 3551 int 3552 nfsrv_access(struct vnode *vp, int flags, kauth_cred_t cred, int rdonly, struct lwp *lwp, int override) 3553 { 3554 struct vattr vattr; 3555 int error; 3556 if (flags & VWRITE) { 3557 /* Just vn_writechk() changed to check rdonly */ 3558 /* 3559 * Disallow write attempts on read-only file systems; 3560 * unless the file is a socket or a block or character 3561 * device resident on the file system. 3562 */ 3563 if (rdonly || (vp->v_mount->mnt_flag & MNT_RDONLY)) { 3564 switch (vp->v_type) { 3565 case VREG: 3566 case VDIR: 3567 case VLNK: 3568 return (EROFS); 3569 default: 3570 break; 3571 } 3572 } 3573 3574 /* 3575 * If the vnode is in use as a process's text, 3576 * we can't allow writing. 3577 */ 3578 if (vp->v_iflag & VI_TEXT) 3579 return (ETXTBSY); 3580 } 3581 error = VOP_GETATTR(vp, &vattr, cred); 3582 if (error) 3583 return (error); 3584 error = VOP_ACCESS(vp, flags, cred); 3585 /* 3586 * Allow certain operations for the owner (reads and writes 3587 * on files that are already open). 3588 */ 3589 if (override && error == EACCES && kauth_cred_geteuid(cred) == vattr.va_uid) 3590 error = 0; 3591 return error; 3592 } 3593