nfs_serv.c revision 1.169
1 /* $NetBSD: nfs_serv.c,v 1.169 2014/01/17 10:55:02 hannken 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 1.169 2014/01/17 10:55:02 hannken 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 case MODULE_CMD_AUTOUNLOAD: 148 if (netexport_hasexports()) 149 return EBUSY; 150 /*FALLTHROUGH*/ 151 default: 152 return ENOTTY; 153 } 154 } 155 156 /* 157 * nfs v3 access service 158 */ 159 int 160 nfsrv3_access(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 161 { 162 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 163 struct mbuf *nam = nfsd->nd_nam; 164 char *dpos = nfsd->nd_dpos; 165 kauth_cred_t cred = nfsd->nd_cr; 166 struct vnode *vp; 167 nfsrvfh_t nsfh; 168 u_int32_t *tl; 169 int32_t t1; 170 char *bpos; 171 int error = 0, rdonly, cache = 0, getret; 172 char *cp2; 173 struct mbuf *mb, *mreq __unused; 174 struct vattr va; 175 u_long inmode, testmode, outmode; 176 u_quad_t frev; 177 178 nfsm_srvmtofh(&nsfh); 179 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 180 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, &rdonly, 181 (nfsd->nd_flag & ND_KERBAUTH), false); 182 if (error) { 183 nfsm_reply(NFSX_UNSIGNED); 184 nfsm_srvpostop_attr(1, (struct vattr *)0); 185 return (0); 186 } 187 inmode = fxdr_unsigned(u_int32_t, *tl); 188 outmode = 0; 189 if ((inmode & NFSV3ACCESS_READ) && 190 nfsrv_access(vp, VREAD, cred, rdonly, lwp, 0) == 0) 191 outmode |= NFSV3ACCESS_READ; 192 if (vp->v_type != VDIR) { 193 testmode = inmode & (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND); 194 if (testmode && 195 nfsrv_access(vp, VWRITE, cred, rdonly, lwp, 0) == 0) 196 outmode |= testmode; 197 if ((inmode & NFSV3ACCESS_EXECUTE) && 198 nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 0) == 0) 199 outmode |= NFSV3ACCESS_EXECUTE; 200 } else { 201 testmode = inmode & (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | 202 NFSV3ACCESS_DELETE); 203 if (testmode && 204 nfsrv_access(vp, VWRITE, cred, rdonly, lwp, 0) == 0) 205 outmode |= testmode; 206 if ((inmode & NFSV3ACCESS_LOOKUP) && 207 nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 0) == 0) 208 outmode |= NFSV3ACCESS_LOOKUP; 209 } 210 getret = VOP_GETATTR(vp, &va, cred); 211 vput(vp); 212 nfsm_reply(NFSX_POSTOPATTR(1) + NFSX_UNSIGNED); 213 nfsm_srvpostop_attr(getret, &va); 214 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 215 *tl = txdr_unsigned(outmode); 216 nfsm_srvdone; 217 } 218 219 /* 220 * nfs getattr service 221 */ 222 int 223 nfsrv_getattr(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 224 { 225 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 226 struct mbuf *nam = nfsd->nd_nam; 227 char *dpos = nfsd->nd_dpos; 228 kauth_cred_t cred = nfsd->nd_cr; 229 struct nfs_fattr *fp; 230 struct vattr va; 231 struct vnode *vp; 232 nfsrvfh_t nsfh; 233 u_int32_t *tl; 234 int32_t t1; 235 char *bpos; 236 int error = 0, rdonly, cache = 0; 237 char *cp2; 238 struct mbuf *mb, *mreq __unused; 239 u_quad_t frev; 240 241 nfsm_srvmtofh(&nsfh); 242 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, &rdonly, 243 (nfsd->nd_flag & ND_KERBAUTH), false); 244 if (error) { 245 nfsm_reply(0); 246 return (0); 247 } 248 nqsrv_getl(vp, ND_READ); 249 error = VOP_GETATTR(vp, &va, cred); 250 vput(vp); 251 nfsm_reply(NFSX_FATTR(nfsd->nd_flag & ND_NFSV3)); 252 if (error) 253 return (0); 254 nfsm_build(fp, struct nfs_fattr *, NFSX_FATTR(nfsd->nd_flag & ND_NFSV3)); 255 nfsm_srvfillattr(&va, fp); 256 nfsm_srvdone; 257 } 258 259 /* 260 * nfs setattr service 261 */ 262 int 263 nfsrv_setattr(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 264 { 265 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 266 struct mbuf *nam = nfsd->nd_nam; 267 char *dpos = nfsd->nd_dpos; 268 kauth_cred_t cred = nfsd->nd_cr; 269 struct vattr va, preat; 270 struct nfsv2_sattr *sp; 271 struct nfs_fattr *fp; 272 struct vnode *vp; 273 nfsrvfh_t nsfh; 274 u_int32_t *tl; 275 int32_t t1; 276 char *bpos; 277 int error = 0, rdonly, cache = 0, preat_ret = 1, postat_ret = 1; 278 int v3 = (nfsd->nd_flag & ND_NFSV3), gcheck = 0; 279 char *cp2; 280 struct mbuf *mb, *mreq __unused; 281 u_quad_t frev; 282 struct timespec guard; 283 284 memset(&guard, 0, sizeof guard); /* XXX gcc */ 285 286 nfsm_srvmtofh(&nsfh); 287 vattr_null(&va); 288 if (v3) { 289 nfsm_srvsattr(&va); 290 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 291 gcheck = fxdr_unsigned(int, *tl); 292 if (gcheck) { 293 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 294 fxdr_nfsv3time(tl, &guard); 295 } 296 } else { 297 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 298 /* 299 * Nah nah nah nah na nah 300 * There is a bug in the Sun client that puts 0xffff in the mode 301 * field of sattr when it should put in 0xffffffff. The u_short 302 * doesn't sign extend. 303 * --> check the low order 2 bytes for 0xffff 304 */ 305 if ((fxdr_unsigned(int, sp->sa_mode) & 0xffff) != 0xffff) 306 va.va_mode = nfstov_mode(sp->sa_mode); 307 if (sp->sa_uid != nfs_xdrneg1) 308 va.va_uid = fxdr_unsigned(uid_t, sp->sa_uid); 309 if (sp->sa_gid != nfs_xdrneg1) 310 va.va_gid = fxdr_unsigned(gid_t, sp->sa_gid); 311 if (sp->sa_size != nfs_xdrneg1) 312 va.va_size = fxdr_unsigned(u_quad_t, sp->sa_size); 313 if (sp->sa_atime.nfsv2_sec != nfs_xdrneg1) { 314 #ifdef notyet 315 fxdr_nfsv2time(&sp->sa_atime, &va.va_atime); 316 #else 317 va.va_atime.tv_sec = 318 fxdr_unsigned(u_int32_t,sp->sa_atime.nfsv2_sec); 319 va.va_atime.tv_nsec = 0; 320 #endif 321 } 322 if (sp->sa_mtime.nfsv2_sec != nfs_xdrneg1) 323 fxdr_nfsv2time(&sp->sa_mtime, &va.va_mtime); 324 325 } 326 327 /* 328 * Now that we have all the fields, lets do it. 329 */ 330 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, &rdonly, 331 (nfsd->nd_flag & ND_KERBAUTH), false); 332 if (error) { 333 nfsm_reply(2 * NFSX_UNSIGNED); 334 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 335 return (0); 336 } 337 nqsrv_getl(vp, ND_WRITE); 338 if (v3) { 339 error = preat_ret = VOP_GETATTR(vp, &preat, cred); 340 if (!error && gcheck && 341 (preat.va_ctime.tv_sec != guard.tv_sec || 342 preat.va_ctime.tv_nsec != guard.tv_nsec)) 343 error = NFSERR_NOT_SYNC; 344 if (error) { 345 vput(vp); 346 nfsm_reply(NFSX_WCCDATA(v3)); 347 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 348 return (0); 349 } 350 } 351 352 /* 353 * If the size is being changed write acces is required, otherwise 354 * just check for a read only file system. 355 */ 356 if (va.va_size == ((u_quad_t)((quad_t) -1))) { 357 if (rdonly || (vp->v_mount->mnt_flag & MNT_RDONLY)) { 358 error = EROFS; 359 goto out; 360 } 361 } else { 362 if (vp->v_type == VDIR) { 363 error = EISDIR; 364 goto out; 365 } else if ((error = nfsrv_access(vp, VWRITE, cred, rdonly, 366 lwp, 0)) != 0) 367 goto out; 368 } 369 error = VOP_SETATTR(vp, &va, cred); 370 postat_ret = VOP_GETATTR(vp, &va, cred); 371 if (!error) 372 error = postat_ret; 373 out: 374 vput(vp); 375 nfsm_reply(NFSX_WCCORFATTR(v3)); 376 if (v3) { 377 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 378 return (0); 379 } else { 380 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 381 nfsm_srvfillattr(&va, fp); 382 } 383 nfsm_srvdone; 384 } 385 386 /* 387 * nfs lookup rpc 388 */ 389 int 390 nfsrv_lookup(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 391 { 392 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 393 struct mbuf *nam = nfsd->nd_nam; 394 char *dpos = nfsd->nd_dpos; 395 kauth_cred_t cred = nfsd->nd_cr; 396 struct nfs_fattr *fp; 397 struct nameidata nd, ind, *ndp = &nd; 398 struct pathbuf *ipb = NULL; 399 struct vnode *vp, *dirp; 400 nfsrvfh_t nsfh; 401 char *cp; 402 u_int32_t *tl; 403 int32_t t1; 404 char *bpos; 405 int error = 0, cache = 0, dirattr_ret = 1; 406 uint32_t len; 407 int v3 = (nfsd->nd_flag & ND_NFSV3), pubflag; 408 char *cp2; 409 struct mbuf *mb, *mreq __unused; 410 struct vattr va, dirattr; 411 u_quad_t frev; 412 413 nfsm_srvmtofh(&nsfh); 414 nfsm_srvnamesiz(len); 415 416 pubflag = nfs_ispublicfh(&nsfh); 417 418 nd.ni_cnd.cn_cred = cred; 419 nd.ni_cnd.cn_nameiop = LOOKUP; 420 nd.ni_cnd.cn_flags = LOCKLEAF; 421 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 422 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), pubflag); 423 424 if (!error && pubflag) { 425 if (nd.ni_vp->v_type == VDIR && nfs_pub.np_index != NULL && 426 (ipb = pathbuf_create(nfs_pub.np_index)) != NULL) { 427 /* 428 * Setup call to lookup() to see if we can find 429 * the index file. Arguably, this doesn't belong 430 * in a kernel.. Ugh. 431 */ 432 ind = nd; 433 VOP_UNLOCK(nd.ni_vp); 434 ind.ni_pathbuf = ipb; 435 436 error = lookup_for_nfsd_index(&ind, nd.ni_vp); 437 if (!error) { 438 /* 439 * Found an index file. Get rid of 440 * the old references. 441 */ 442 if (dirp) 443 vrele(dirp); 444 dirp = nd.ni_vp; 445 ndp = &ind; 446 } else 447 error = 0; 448 } 449 /* 450 * If the public filehandle was used, check that this lookup 451 * didn't result in a filehandle outside the publicly exported 452 * filesystem. 453 */ 454 455 if (!error && ndp->ni_vp->v_mount != nfs_pub.np_mount) { 456 vput(nd.ni_vp); 457 error = EPERM; 458 } 459 } 460 461 if (error) { 462 if (nd.ni_pathbuf != NULL) { 463 pathbuf_destroy(nd.ni_pathbuf); 464 } 465 if (ipb != NULL) { 466 pathbuf_destroy(ipb); 467 } 468 if (dirp) { 469 if (v3) { 470 vn_lock(dirp, LK_SHARED | LK_RETRY); 471 dirattr_ret = VOP_GETATTR(dirp, &dirattr, cred); 472 vput(dirp); 473 } else 474 vrele(dirp); 475 } 476 nfsm_reply(NFSX_POSTOPATTR(v3)); 477 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 478 return (0); 479 } 480 481 nqsrv_getl(ndp->ni_startdir, ND_READ); 482 pathbuf_destroy(nd.ni_pathbuf); 483 if (ipb != NULL) { 484 pathbuf_destroy(ipb); 485 } 486 vp = ndp->ni_vp; 487 error = nfsrv_composefh(vp, &nsfh, v3); 488 if (!error) 489 error = VOP_GETATTR(vp, &va, cred); 490 vput(vp); 491 if (dirp) { 492 if (v3) { 493 vn_lock(dirp, LK_SHARED | LK_RETRY); 494 dirattr_ret = VOP_GETATTR(dirp, &dirattr, cred); 495 vput(dirp); 496 } else 497 vrele(dirp); 498 } 499 nfsm_reply(NFSX_SRVFH(&nsfh, v3) + NFSX_POSTOPORFATTR(v3) + 500 NFSX_POSTOPATTR(v3)); 501 if (error) { 502 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 503 return (0); 504 } 505 nfsm_srvfhtom(&nsfh, v3); 506 if (v3) { 507 nfsm_srvpostop_attr(0, &va); 508 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 509 } else { 510 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 511 nfsm_srvfillattr(&va, fp); 512 } 513 nfsm_srvdone; 514 } 515 516 /* 517 * nfs readlink service 518 */ 519 int 520 nfsrv_readlink(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 521 { 522 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 523 struct mbuf *nam = nfsd->nd_nam; 524 char *dpos = nfsd->nd_dpos; 525 kauth_cred_t cred = nfsd->nd_cr; 526 struct iovec iv[(NFS_MAXPATHLEN+MLEN-1)/MLEN]; 527 struct iovec *ivp = iv; 528 struct mbuf *mp; 529 u_int32_t *tl; 530 int32_t t1; 531 char *bpos; 532 int error = 0, rdonly, cache = 0, i, padlen, getret; 533 uint32_t len; 534 int v3 = (nfsd->nd_flag & ND_NFSV3); 535 char *cp2; 536 struct mbuf *mb, *mp2 = NULL, *mp3 = NULL, *mreq __unused; 537 struct vnode *vp; 538 struct vattr attr; 539 nfsrvfh_t nsfh; 540 struct uio io, *uiop = &io; 541 u_quad_t frev; 542 543 nfsm_srvmtofh(&nsfh); 544 len = 0; 545 i = 0; 546 while (len < NFS_MAXPATHLEN) { 547 mp = m_get(M_WAIT, MT_DATA); 548 MCLAIM(mp, &nfs_mowner); 549 m_clget(mp, M_WAIT); 550 mp->m_len = NFSMSIZ(mp); 551 if (len == 0) 552 mp3 = mp2 = mp; 553 else { 554 mp2->m_next = mp; 555 mp2 = mp; 556 } 557 if ((len+mp->m_len) > NFS_MAXPATHLEN) { 558 mp->m_len = NFS_MAXPATHLEN-len; 559 len = NFS_MAXPATHLEN; 560 } else 561 len += mp->m_len; 562 ivp->iov_base = mtod(mp, void *); 563 ivp->iov_len = mp->m_len; 564 i++; 565 ivp++; 566 } 567 uiop->uio_iov = iv; 568 uiop->uio_iovcnt = i; 569 uiop->uio_offset = 0; 570 uiop->uio_resid = len; 571 uiop->uio_rw = UIO_READ; 572 UIO_SETUP_SYSSPACE(uiop); 573 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 574 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 575 if (error) { 576 m_freem(mp3); 577 nfsm_reply(2 * NFSX_UNSIGNED); 578 nfsm_srvpostop_attr(1, (struct vattr *)0); 579 return (0); 580 } 581 if (vp->v_type != VLNK) { 582 if (v3) 583 error = EINVAL; 584 else 585 error = ENXIO; 586 goto out; 587 } 588 nqsrv_getl(vp, ND_READ); 589 error = VOP_READLINK(vp, uiop, cred); 590 out: 591 getret = VOP_GETATTR(vp, &attr, cred); 592 vput(vp); 593 if (error) 594 m_freem(mp3); 595 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_UNSIGNED); 596 if (v3) { 597 nfsm_srvpostop_attr(getret, &attr); 598 if (error) 599 return (0); 600 } 601 len -= uiop->uio_resid; 602 padlen = nfsm_padlen(len); 603 if (uiop->uio_resid || padlen) 604 nfs_zeropad(mp3, uiop->uio_resid, padlen); 605 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 606 *tl = txdr_unsigned(len); 607 mb->m_next = mp3; 608 nfsm_srvdone; 609 } 610 611 /* 612 * nfs read service 613 */ 614 int 615 nfsrv_read(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 616 { 617 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 618 struct mbuf *nam = nfsd->nd_nam; 619 char *dpos = nfsd->nd_dpos; 620 kauth_cred_t cred = nfsd->nd_cr; 621 struct mbuf *m; 622 struct nfs_fattr *fp; 623 u_int32_t *tl; 624 int32_t t1; 625 int i; 626 char *bpos; 627 int error = 0, rdonly, cache = 0, getret; 628 int v3 = (nfsd->nd_flag & ND_NFSV3); 629 uint32_t reqlen, len, cnt, left; 630 int padlen; 631 char *cp2; 632 struct mbuf *mb, *mreq; 633 struct vnode *vp; 634 nfsrvfh_t nsfh; 635 struct uio io, *uiop = &io; 636 struct vattr va; 637 off_t off; 638 u_quad_t frev; 639 640 nfsm_srvmtofh(&nsfh); 641 if (v3) { 642 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 643 off = fxdr_hyper(tl); 644 } else { 645 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 646 off = (off_t)fxdr_unsigned(u_int32_t, *tl); 647 } 648 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 649 reqlen = fxdr_unsigned(uint32_t, *tl); 650 reqlen = MIN(reqlen, NFS_SRVMAXDATA(nfsd)); 651 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 652 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 653 if (error) { 654 nfsm_reply(2 * NFSX_UNSIGNED); 655 nfsm_srvpostop_attr(1, (struct vattr *)0); 656 return (0); 657 } 658 if (vp->v_type != VREG) { 659 if (v3) 660 error = EINVAL; 661 else 662 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 663 } 664 if (!error) { 665 nqsrv_getl(vp, ND_READ); 666 if ((error = nfsrv_access(vp, VREAD, cred, rdonly, lwp, 1)) != 0) 667 error = nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 1); 668 } 669 getret = VOP_GETATTR(vp, &va, cred); 670 if (!error) 671 error = getret; 672 if (error) { 673 vput(vp); 674 nfsm_reply(NFSX_POSTOPATTR(v3)); 675 nfsm_srvpostop_attr(getret, &va); 676 return (0); 677 } 678 if (off >= va.va_size) 679 cnt = 0; 680 else if ((off + reqlen) > va.va_size) 681 cnt = va.va_size - off; 682 else 683 cnt = reqlen; 684 nfsm_reply(NFSX_POSTOPORFATTR(v3) + 3 * NFSX_UNSIGNED+nfsm_rndup(cnt)); 685 if (v3) { 686 nfsm_build(tl, u_int32_t *, NFSX_V3FATTR + 4 * NFSX_UNSIGNED); 687 *tl++ = nfs_true; 688 fp = (struct nfs_fattr *)tl; 689 tl += (NFSX_V3FATTR / sizeof (u_int32_t)); 690 } else { 691 nfsm_build(tl, u_int32_t *, NFSX_V2FATTR + NFSX_UNSIGNED); 692 fp = (struct nfs_fattr *)tl; 693 tl += (NFSX_V2FATTR / sizeof (u_int32_t)); 694 } 695 len = left = cnt; 696 if (cnt > 0) { 697 if (nfsd_use_loan) { 698 struct vm_page **pgpp; 699 voff_t pgoff = trunc_page(off); 700 int npages; 701 vaddr_t lva; 702 703 npages = (round_page(off + cnt) - pgoff) >> PAGE_SHIFT; 704 KASSERT(npages <= M_EXT_MAXPAGES); /* XXX */ 705 706 /* allocate kva for mbuf data */ 707 lva = sokvaalloc(pgoff, npages << PAGE_SHIFT, 708 slp->ns_so); 709 if (lva == 0) { 710 /* fall back to VOP_READ */ 711 goto loan_fail; 712 } 713 714 /* allocate mbuf */ 715 m = m_get(M_WAIT, MT_DATA); 716 MCLAIM(m, &nfs_mowner); 717 pgpp = m->m_ext.ext_pgs; 718 719 /* loan pages */ 720 error = uvm_loanuobjpages(&vp->v_uobj, pgoff, npages, 721 pgpp); 722 if (error) { 723 sokvafree(lva, npages << PAGE_SHIFT); 724 m_free(m); 725 if (error == EBUSY) 726 goto loan_fail; 727 goto read_error; 728 } 729 730 /* associate kva to mbuf */ 731 MEXTADD(m, (void *)(lva + ((vaddr_t)off & PAGE_MASK)), 732 cnt, M_MBUF, soloanfree, slp->ns_so); 733 m->m_flags |= M_EXT_PAGES | M_EXT_ROMAP; 734 m->m_len = cnt; 735 736 /* map pages */ 737 for (i = 0; i < npages; i++) { 738 pmap_kenter_pa(lva, VM_PAGE_TO_PHYS(pgpp[i]), 739 VM_PROT_READ, 0); 740 lva += PAGE_SIZE; 741 } 742 743 pmap_update(pmap_kernel()); 744 745 mb->m_next = m; 746 mb = m; 747 error = 0; 748 uiop->uio_resid = 0; 749 } else { 750 struct iovec *iv; 751 struct iovec *iv2; 752 struct mbuf *m2; 753 int siz; 754 loan_fail: 755 /* 756 * Generate the mbuf list with the uio_iov ref. to it. 757 */ 758 i = 0; 759 m = m2 = mb; 760 while (left > 0) { 761 siz = min(M_TRAILINGSPACE(m), left); 762 if (siz > 0) { 763 left -= siz; 764 i++; 765 } 766 if (left > 0) { 767 m = m_get(M_WAIT, MT_DATA); 768 MCLAIM(m, &nfs_mowner); 769 m_clget(m, M_WAIT); 770 m->m_len = 0; 771 m2->m_next = m; 772 m2 = m; 773 } 774 } 775 iv = malloc(i * sizeof(struct iovec), M_TEMP, M_WAITOK); 776 uiop->uio_iov = iv2 = iv; 777 m = mb; 778 left = cnt; 779 i = 0; 780 while (left > 0) { 781 if (m == NULL) 782 panic("nfsrv_read iov"); 783 siz = min(M_TRAILINGSPACE(m), left); 784 if (siz > 0) { 785 iv->iov_base = mtod(m, char *) + 786 m->m_len; 787 iv->iov_len = siz; 788 m->m_len += siz; 789 left -= siz; 790 iv++; 791 i++; 792 } 793 m = m->m_next; 794 } 795 uiop->uio_iovcnt = i; 796 uiop->uio_offset = off; 797 uiop->uio_resid = cnt; 798 uiop->uio_rw = UIO_READ; 799 UIO_SETUP_SYSSPACE(uiop); 800 error = VOP_READ(vp, uiop, IO_NODELOCKED, cred); 801 free((void *)iv2, M_TEMP); 802 } 803 read_error: 804 if (error || (getret = VOP_GETATTR(vp, &va, cred)) != 0){ 805 if (!error) 806 error = getret; 807 m_freem(mreq); 808 vput(vp); 809 nfsm_reply(NFSX_POSTOPATTR(v3)); 810 nfsm_srvpostop_attr(getret, &va); 811 return (0); 812 } 813 } else { 814 uiop->uio_resid = 0; 815 } 816 vput(vp); 817 nfsm_srvfillattr(&va, fp); 818 len -= uiop->uio_resid; 819 padlen = nfsm_padlen(len); 820 if (uiop->uio_resid || padlen) 821 nfs_zeropad(mb, uiop->uio_resid, padlen); 822 if (v3) { 823 /* count */ 824 *tl++ = txdr_unsigned(len); 825 /* eof */ 826 if (off + len >= va.va_size) 827 *tl++ = nfs_true; 828 else 829 *tl++ = nfs_false; 830 } 831 *tl = txdr_unsigned(len); 832 nfsm_srvdone; 833 } 834 835 /* 836 * nfs write service 837 */ 838 int 839 nfsrv_write(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 840 { 841 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 842 struct mbuf *nam = nfsd->nd_nam; 843 char *dpos = nfsd->nd_dpos; 844 kauth_cred_t cred = nfsd->nd_cr; 845 struct iovec *ivp; 846 int i, cnt; 847 struct mbuf *mp; 848 struct nfs_fattr *fp; 849 struct iovec *iv; 850 struct vattr va, forat; 851 u_int32_t *tl; 852 int32_t t1; 853 char *bpos; 854 int error = 0, rdonly, cache = 0, len, forat_ret = 1; 855 int ioflags, aftat_ret = 1, retlen, zeroing, adjust; 856 int stable = NFSV3WRITE_FILESYNC; 857 int v3 = (nfsd->nd_flag & ND_NFSV3); 858 char *cp2; 859 struct mbuf *mb, *mreq __unused; 860 struct vnode *vp; 861 nfsrvfh_t nsfh; 862 struct uio io, *uiop = &io; 863 off_t off; 864 u_quad_t frev; 865 866 if (mrep == NULL) { 867 *mrq = NULL; 868 return (0); 869 } 870 nfsm_srvmtofh(&nsfh); 871 if (v3) { 872 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 873 off = fxdr_hyper(tl); 874 tl += 3; 875 stable = fxdr_unsigned(int, *tl++); 876 } else { 877 nfsm_dissect(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 878 off = (off_t)fxdr_unsigned(u_int32_t, *++tl); 879 tl += 2; 880 } 881 retlen = len = fxdr_unsigned(int32_t, *tl); 882 cnt = i = 0; 883 884 /* 885 * For NFS Version 2, it is not obvious what a write of zero length 886 * should do, but I might as well be consistent with Version 3, 887 * which is to return ok so long as there are no permission problems. 888 */ 889 if (len > 0) { 890 zeroing = 1; 891 mp = mrep; 892 while (mp) { 893 if (mp == md) { 894 zeroing = 0; 895 adjust = dpos - mtod(mp, char *); 896 mp->m_len -= adjust; 897 if (mp->m_len > 0 && adjust > 0) 898 NFSMADV(mp, adjust); 899 } 900 if (zeroing) 901 mp->m_len = 0; 902 else if (mp->m_len > 0) { 903 i += mp->m_len; 904 if (i > len) { 905 mp->m_len -= (i - len); 906 zeroing = 1; 907 } 908 if (mp->m_len > 0) 909 cnt++; 910 } 911 mp = mp->m_next; 912 } 913 } 914 if (len > NFS_MAXDATA || len < 0 || i < len) { 915 error = EIO; 916 nfsm_reply(2 * NFSX_UNSIGNED); 917 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 918 return (0); 919 } 920 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 921 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 922 if (error) { 923 nfsm_reply(2 * NFSX_UNSIGNED); 924 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 925 return (0); 926 } 927 if (v3) 928 forat_ret = VOP_GETATTR(vp, &forat, cred); 929 if (vp->v_type != VREG) { 930 if (v3) 931 error = EINVAL; 932 else 933 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 934 } 935 if (!error) { 936 nqsrv_getl(vp, ND_WRITE); 937 error = nfsrv_access(vp, VWRITE, cred, rdonly, lwp, 1); 938 } 939 if (error) { 940 vput(vp); 941 nfsm_reply(NFSX_WCCDATA(v3)); 942 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 943 return (0); 944 } 945 946 if (len > 0) { 947 ivp = malloc(cnt * sizeof (struct iovec), M_TEMP, M_WAITOK); 948 uiop->uio_iov = iv = ivp; 949 uiop->uio_iovcnt = cnt; 950 mp = mrep; 951 while (mp) { 952 if (mp->m_len > 0) { 953 ivp->iov_base = mtod(mp, void *); 954 ivp->iov_len = mp->m_len; 955 ivp++; 956 } 957 mp = mp->m_next; 958 } 959 960 /* 961 * XXX 962 * The IO_METASYNC flag indicates that all metadata (and not 963 * just enough to ensure data integrity) must be written to 964 * stable storage synchronously. 965 * (IO_METASYNC is not yet implemented in 4.4BSD-Lite.) 966 */ 967 if (stable == NFSV3WRITE_UNSTABLE) 968 ioflags = IO_NODELOCKED; 969 else if (stable == NFSV3WRITE_DATASYNC) 970 ioflags = (IO_SYNC | IO_NODELOCKED); 971 else 972 ioflags = (IO_METASYNC | IO_SYNC | IO_NODELOCKED); 973 uiop->uio_resid = len; 974 uiop->uio_rw = UIO_WRITE; 975 uiop->uio_offset = off; 976 UIO_SETUP_SYSSPACE(uiop); 977 error = VOP_WRITE(vp, uiop, ioflags, cred); 978 nfsstats.srvvop_writes++; 979 free(iv, M_TEMP); 980 } 981 aftat_ret = VOP_GETATTR(vp, &va, cred); 982 vput(vp); 983 if (!error) 984 error = aftat_ret; 985 nfsm_reply(NFSX_PREOPATTR(v3) + NFSX_POSTOPORFATTR(v3) + 986 2 * NFSX_UNSIGNED + NFSX_WRITEVERF(v3)); 987 if (v3) { 988 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 989 if (error) 990 return (0); 991 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 992 *tl++ = txdr_unsigned(retlen); 993 if (stable == NFSV3WRITE_UNSTABLE) 994 *tl++ = txdr_unsigned(stable); 995 else 996 *tl++ = txdr_unsigned(NFSV3WRITE_FILESYNC); 997 /* 998 * Actually, there is no need to txdr these fields, 999 * but it may make the values more human readable, 1000 * for debugging purposes. 1001 */ 1002 *tl++ = txdr_unsigned(boottime.tv_sec); 1003 *tl = txdr_unsigned(boottime.tv_nsec / 1000); 1004 } else { 1005 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 1006 nfsm_srvfillattr(&va, fp); 1007 } 1008 nfsm_srvdone; 1009 } 1010 1011 /* 1012 * XXX elad: the original NFSW_SAMECRED() macro also made sure the 1013 * two nd_flag fields of the descriptors contained 1014 * ND_KERBAUTH. 1015 */ 1016 static int 1017 nfsrv_samecred(kauth_cred_t cred1, kauth_cred_t cred2) 1018 { 1019 int i, do_ngroups; 1020 1021 if (kauth_cred_geteuid(cred1) != kauth_cred_geteuid(cred2)) 1022 return (0); 1023 if (kauth_cred_ngroups(cred1) != kauth_cred_ngroups(cred2)) 1024 return (0); 1025 do_ngroups = kauth_cred_ngroups(cred1); 1026 for (i = 0; i < do_ngroups; i++) 1027 if (kauth_cred_group(cred1, i) != 1028 kauth_cred_group(cred2, i)) 1029 return (0); 1030 1031 return (1); 1032 } 1033 1034 static struct nfsrvw_delayhash * 1035 nfsrv_nwdelayhash(struct nfssvc_sock *slp, const nfsrvfh_t *nsfh) 1036 { 1037 uint32_t hash; 1038 1039 hash = hash32_buf(NFSRVFH_DATA(nsfh), NFSRVFH_SIZE(nsfh), 1040 HASH32_BUF_INIT); 1041 return &slp->ns_wdelayhashtbl[hash % NFS_WDELAYHASHSIZ]; 1042 } 1043 1044 /* 1045 * NFS write service with write gathering support. Called when 1046 * nfsrvw_procrastinate > 0. 1047 * See: Chet Juszczak, "Improving the Write Performance of an NFS Server", 1048 * in Proc. of the Winter 1994 Usenix Conference, pg. 247-259, San Franscisco, 1049 * Jan. 1994. 1050 */ 1051 int 1052 nfsrv_writegather(struct nfsrv_descript **ndp, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 1053 { 1054 struct timeval now; 1055 struct iovec *ivp; 1056 struct mbuf *mp; 1057 struct nfsrv_descript *wp, *nfsd, *owp, *swp; 1058 struct nfs_fattr *fp; 1059 int i = 0; 1060 struct iovec *iov; 1061 struct nfsrvw_delayhash *wpp; 1062 kauth_cred_t cred; 1063 struct vattr va, forat; 1064 u_int32_t *tl; 1065 int32_t t1; 1066 char *bpos, *dpos; 1067 int error = 0, rdonly, cache = 0, len = 0, forat_ret = 1; 1068 int ioflags, aftat_ret = 1, adjust, v3, zeroing; 1069 char *cp2; 1070 struct mbuf *mb, *mreq, *mrep, *md; 1071 struct vnode *vp; 1072 struct uio io, *uiop = &io; 1073 u_quad_t frev, cur_usec; 1074 1075 *mrq = NULL; 1076 if (*ndp) { 1077 nfsd = *ndp; 1078 *ndp = NULL; 1079 mrep = nfsd->nd_mrep; 1080 md = nfsd->nd_md; 1081 dpos = nfsd->nd_dpos; 1082 cred = nfsd->nd_cr; 1083 v3 = (nfsd->nd_flag & ND_NFSV3); 1084 LIST_INIT(&nfsd->nd_coalesce); 1085 nfsd->nd_mreq = NULL; 1086 nfsd->nd_stable = NFSV3WRITE_FILESYNC; 1087 getmicrotime(&now); 1088 cur_usec = (u_quad_t)now.tv_sec * 1000000 + (u_quad_t)now.tv_usec; 1089 nfsd->nd_time = cur_usec + nfsrvw_procrastinate; 1090 1091 /* 1092 * Now, get the write header.. 1093 */ 1094 nfsm_srvmtofh(&nfsd->nd_fh); 1095 if (v3) { 1096 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 1097 nfsd->nd_off = fxdr_hyper(tl); 1098 tl += 3; 1099 nfsd->nd_stable = fxdr_unsigned(int, *tl++); 1100 } else { 1101 nfsm_dissect(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1102 nfsd->nd_off = (off_t)fxdr_unsigned(u_int32_t, *++tl); 1103 tl += 2; 1104 } 1105 len = fxdr_unsigned(int32_t, *tl); 1106 nfsd->nd_len = len; 1107 nfsd->nd_eoff = nfsd->nd_off + len; 1108 1109 /* 1110 * Trim the header out of the mbuf list and trim off any trailing 1111 * junk so that the mbuf list has only the write data. 1112 */ 1113 zeroing = 1; 1114 i = 0; 1115 mp = mrep; 1116 while (mp) { 1117 if (mp == md) { 1118 zeroing = 0; 1119 adjust = dpos - mtod(mp, char *); 1120 mp->m_len -= adjust; 1121 if (mp->m_len > 0 && adjust > 0) 1122 NFSMADV(mp, adjust); 1123 } 1124 if (zeroing) 1125 mp->m_len = 0; 1126 else { 1127 i += mp->m_len; 1128 if (i > len) { 1129 mp->m_len -= (i - len); 1130 zeroing = 1; 1131 } 1132 } 1133 mp = mp->m_next; 1134 } 1135 if (len > NFS_MAXDATA || len < 0 || i < len) { 1136 nfsmout: 1137 m_freem(mrep); 1138 error = EIO; 1139 nfsm_writereply(2 * NFSX_UNSIGNED, v3); 1140 if (v3) 1141 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1142 nfsd->nd_mreq = mreq; 1143 nfsd->nd_mrep = NULL; 1144 nfsd->nd_time = 0; 1145 } 1146 1147 /* 1148 * Add this entry to the hash and time queues. 1149 */ 1150 owp = NULL; 1151 mutex_enter(&nfsd_lock); 1152 wp = LIST_FIRST(&slp->ns_tq); 1153 while (wp && wp->nd_time < nfsd->nd_time) { 1154 owp = wp; 1155 wp = LIST_NEXT(wp, nd_tq); 1156 } 1157 if (owp) { 1158 LIST_INSERT_AFTER(owp, nfsd, nd_tq); 1159 } else { 1160 LIST_INSERT_HEAD(&slp->ns_tq, nfsd, nd_tq); 1161 } 1162 if (nfsd->nd_mrep) { 1163 wpp = nfsrv_nwdelayhash(slp, &nfsd->nd_fh); 1164 owp = NULL; 1165 wp = LIST_FIRST(wpp); 1166 while (wp && nfsrv_comparefh(&nfsd->nd_fh, &wp->nd_fh)) { 1167 owp = wp; 1168 wp = LIST_NEXT(wp, nd_hash); 1169 } 1170 while (wp && wp->nd_off < nfsd->nd_off && 1171 !nfsrv_comparefh(&nfsd->nd_fh, &wp->nd_fh)) { 1172 owp = wp; 1173 wp = LIST_NEXT(wp, nd_hash); 1174 } 1175 if (owp) { 1176 LIST_INSERT_AFTER(owp, nfsd, nd_hash); 1177 1178 /* 1179 * Search the hash list for overlapping entries and 1180 * coalesce. 1181 */ 1182 for(; nfsd && NFSW_CONTIG(owp, nfsd); nfsd = wp) { 1183 wp = LIST_NEXT(nfsd, nd_hash); 1184 if (nfsrv_samecred(owp->nd_cr, nfsd->nd_cr)) 1185 nfsrvw_coalesce(owp, nfsd); 1186 } 1187 } else { 1188 LIST_INSERT_HEAD(wpp, nfsd, nd_hash); 1189 } 1190 } 1191 mutex_exit(&nfsd_lock); 1192 } 1193 1194 /* 1195 * Now, do VOP_WRITE()s for any one(s) that need to be done now 1196 * and generate the associated reply mbuf list(s). 1197 */ 1198 loop1: 1199 getmicrotime(&now); 1200 cur_usec = (u_quad_t)now.tv_sec * 1000000 + (u_quad_t)now.tv_usec; 1201 mutex_enter(&nfsd_lock); 1202 for (nfsd = LIST_FIRST(&slp->ns_tq); nfsd; nfsd = owp) { 1203 owp = LIST_NEXT(nfsd, nd_tq); 1204 if (nfsd->nd_time > cur_usec) 1205 break; 1206 if (nfsd->nd_mreq) 1207 continue; 1208 LIST_REMOVE(nfsd, nd_tq); 1209 LIST_REMOVE(nfsd, nd_hash); 1210 mutex_exit(&nfsd_lock); 1211 1212 mrep = nfsd->nd_mrep; 1213 nfsd->nd_mrep = NULL; 1214 cred = nfsd->nd_cr; 1215 v3 = (nfsd->nd_flag & ND_NFSV3); 1216 forat_ret = aftat_ret = 1; 1217 error = nfsrv_fhtovp(&nfsd->nd_fh, 1, &vp, cred, slp, 1218 nfsd->nd_nam, &rdonly, (nfsd->nd_flag & ND_KERBAUTH), 1219 false); 1220 if (!error) { 1221 if (v3) 1222 forat_ret = VOP_GETATTR(vp, &forat, cred); 1223 if (vp->v_type != VREG) { 1224 if (v3) 1225 error = EINVAL; 1226 else 1227 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 1228 } 1229 } else 1230 vp = NULL; 1231 if (!error) { 1232 nqsrv_getl(vp, ND_WRITE); 1233 error = nfsrv_access(vp, VWRITE, cred, rdonly, lwp, 1); 1234 } 1235 1236 if (nfsd->nd_stable == NFSV3WRITE_UNSTABLE) 1237 ioflags = IO_NODELOCKED; 1238 else if (nfsd->nd_stable == NFSV3WRITE_DATASYNC) 1239 ioflags = (IO_SYNC | IO_NODELOCKED); 1240 else 1241 ioflags = (IO_METASYNC | IO_SYNC | IO_NODELOCKED); 1242 uiop->uio_rw = UIO_WRITE; 1243 uiop->uio_offset = nfsd->nd_off; 1244 uiop->uio_resid = nfsd->nd_eoff - nfsd->nd_off; 1245 UIO_SETUP_SYSSPACE(uiop); 1246 if (uiop->uio_resid > 0) { 1247 mp = mrep; 1248 i = 0; 1249 while (mp) { 1250 if (mp->m_len > 0) 1251 i++; 1252 mp = mp->m_next; 1253 } 1254 uiop->uio_iovcnt = i; 1255 iov = malloc(i * sizeof (struct iovec), M_TEMP, M_WAITOK); 1256 uiop->uio_iov = ivp = iov; 1257 mp = mrep; 1258 while (mp) { 1259 if (mp->m_len > 0) { 1260 ivp->iov_base = mtod(mp, void *); 1261 ivp->iov_len = mp->m_len; 1262 ivp++; 1263 } 1264 mp = mp->m_next; 1265 } 1266 if (!error) { 1267 error = VOP_WRITE(vp, uiop, ioflags, cred); 1268 nfsstats.srvvop_writes++; 1269 } 1270 free((void *)iov, M_TEMP); 1271 } 1272 m_freem(mrep); 1273 if (vp) { 1274 aftat_ret = VOP_GETATTR(vp, &va, cred); 1275 vput(vp); 1276 } 1277 1278 /* 1279 * Loop around generating replies for all write rpcs that have 1280 * now been completed. 1281 */ 1282 swp = nfsd; 1283 do { 1284 if (error) { 1285 nfsm_writereply(NFSX_WCCDATA(v3), v3); 1286 if (v3) { 1287 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1288 } 1289 } else { 1290 nfsm_writereply(NFSX_PREOPATTR(v3) + 1291 NFSX_POSTOPORFATTR(v3) + 2 * NFSX_UNSIGNED + 1292 NFSX_WRITEVERF(v3), v3); 1293 if (v3) { 1294 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1295 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1296 *tl++ = txdr_unsigned(nfsd->nd_len); 1297 *tl++ = txdr_unsigned(swp->nd_stable); 1298 /* 1299 * Actually, there is no need to txdr these fields, 1300 * but it may make the values more human readable, 1301 * for debugging purposes. 1302 */ 1303 *tl++ = txdr_unsigned(boottime.tv_sec); 1304 *tl = txdr_unsigned(boottime.tv_nsec / 1000); 1305 } else { 1306 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 1307 nfsm_srvfillattr(&va, fp); 1308 } 1309 } 1310 nfsd->nd_mreq = mreq; 1311 if (nfsd->nd_mrep) 1312 panic("nfsrv_write: nd_mrep not free"); 1313 1314 /* 1315 * Done. Put it at the head of the timer queue so that 1316 * the final phase can return the reply. 1317 */ 1318 mutex_enter(&nfsd_lock); 1319 if (nfsd != swp) { 1320 nfsd->nd_time = 0; 1321 LIST_INSERT_HEAD(&slp->ns_tq, nfsd, nd_tq); 1322 } 1323 nfsd = LIST_FIRST(&swp->nd_coalesce); 1324 if (nfsd) { 1325 LIST_REMOVE(nfsd, nd_tq); 1326 } 1327 mutex_exit(&nfsd_lock); 1328 } while (nfsd); 1329 swp->nd_time = 0; 1330 1331 mutex_enter(&nfsd_lock); 1332 LIST_INSERT_HEAD(&slp->ns_tq, swp, nd_tq); 1333 mutex_exit(&nfsd_lock); 1334 goto loop1; 1335 } 1336 mutex_exit(&nfsd_lock); 1337 nfs_timer_start(); 1338 1339 /* 1340 * Search for a reply to return. 1341 */ 1342 mutex_enter(&nfsd_lock); 1343 LIST_FOREACH(nfsd, &slp->ns_tq, nd_tq) { 1344 if (nfsd->nd_mreq) { 1345 LIST_REMOVE(nfsd, nd_tq); 1346 *mrq = nfsd->nd_mreq; 1347 *ndp = nfsd; 1348 break; 1349 } 1350 } 1351 mutex_exit(&nfsd_lock); 1352 return (0); 1353 } 1354 1355 /* 1356 * Coalesce the write request nfsd into owp. To do this we must: 1357 * - remove nfsd from the queues 1358 * - merge nfsd->nd_mrep into owp->nd_mrep 1359 * - update the nd_eoff and nd_stable for owp 1360 * - put nfsd on owp's nd_coalesce list 1361 * NB: Must be called at splsoftclock(). 1362 */ 1363 void 1364 nfsrvw_coalesce(struct nfsrv_descript *owp, struct nfsrv_descript *nfsd) 1365 { 1366 int overlap; 1367 struct mbuf *mp; 1368 struct nfsrv_descript *m; 1369 1370 KASSERT(mutex_owned(&nfsd_lock)); 1371 1372 LIST_REMOVE(nfsd, nd_hash); 1373 LIST_REMOVE(nfsd, nd_tq); 1374 if (owp->nd_eoff < nfsd->nd_eoff) { 1375 overlap = owp->nd_eoff - nfsd->nd_off; 1376 if (overlap < 0) 1377 panic("nfsrv_coalesce: bad off"); 1378 if (overlap > 0) 1379 m_adj(nfsd->nd_mrep, overlap); 1380 mp = owp->nd_mrep; 1381 while (mp->m_next) 1382 mp = mp->m_next; 1383 mp->m_next = nfsd->nd_mrep; 1384 owp->nd_eoff = nfsd->nd_eoff; 1385 } else 1386 m_freem(nfsd->nd_mrep); 1387 nfsd->nd_mrep = NULL; 1388 if (nfsd->nd_stable == NFSV3WRITE_FILESYNC) 1389 owp->nd_stable = NFSV3WRITE_FILESYNC; 1390 else if (nfsd->nd_stable == NFSV3WRITE_DATASYNC && 1391 owp->nd_stable == NFSV3WRITE_UNSTABLE) 1392 owp->nd_stable = NFSV3WRITE_DATASYNC; 1393 LIST_INSERT_HEAD(&owp->nd_coalesce, nfsd, nd_tq); 1394 /* 1395 * nfsd might hold coalesce elements! Move them to owp. 1396 * Otherwise, requests may be lost and clients will be stuck. 1397 */ 1398 while ((m = LIST_FIRST(&nfsd->nd_coalesce)) != NULL) { 1399 LIST_REMOVE(m, nd_tq); 1400 LIST_INSERT_HEAD(&owp->nd_coalesce, m, nd_tq); 1401 } 1402 } 1403 1404 /* 1405 * nfs create service 1406 * now does a truncate to 0 length via. setattr if it already exists 1407 */ 1408 int 1409 nfsrv_create(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 1410 { 1411 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1412 struct mbuf *nam = nfsd->nd_nam; 1413 char *dpos = nfsd->nd_dpos; 1414 kauth_cred_t cred = nfsd->nd_cr; 1415 struct nfs_fattr *fp; 1416 struct vattr va, dirfor, diraft; 1417 struct nfsv2_sattr *sp; 1418 u_int32_t *tl; 1419 struct nameidata nd; 1420 char *cp; 1421 int32_t t1; 1422 char *bpos; 1423 int error = 0, cache = 0, len, tsize, dirfor_ret = 1, diraft_ret = 1; 1424 int rdev = 0, abort = 0; 1425 int v3 = (nfsd->nd_flag & ND_NFSV3), how, exclusive_flag = 0; 1426 char *cp2; 1427 struct mbuf *mb, *mreq __unused; 1428 struct vnode *vp = NULL, *dirp = NULL; 1429 nfsrvfh_t nsfh; 1430 u_quad_t frev, tempsize; 1431 u_char cverf[NFSX_V3CREATEVERF]; 1432 1433 nd.ni_cnd.cn_nameiop = 0; 1434 nfsm_srvmtofh(&nsfh); 1435 nfsm_srvnamesiz(len); 1436 nd.ni_cnd.cn_cred = cred; 1437 nd.ni_cnd.cn_nameiop = CREATE; 1438 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 1439 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 1440 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 1441 if (dirp && v3) { 1442 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); 1443 } 1444 if (error) { 1445 nfsm_reply(NFSX_WCCDATA(v3)); 1446 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1447 if (dirp) 1448 vrele(dirp); 1449 if (nd.ni_pathbuf != NULL) { 1450 pathbuf_destroy(nd.ni_pathbuf); 1451 nd.ni_pathbuf = NULL; 1452 } 1453 return (0); 1454 } 1455 abort = 1; 1456 vattr_null(&va); 1457 if (v3) { 1458 va.va_mode = 0; 1459 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1460 how = fxdr_unsigned(int, *tl); 1461 switch (how) { 1462 case NFSV3CREATE_GUARDED: 1463 if (nd.ni_vp) { 1464 error = EEXIST; 1465 break; 1466 } 1467 case NFSV3CREATE_UNCHECKED: 1468 nfsm_srvsattr(&va); 1469 break; 1470 case NFSV3CREATE_EXCLUSIVE: 1471 nfsm_dissect(cp, void *, NFSX_V3CREATEVERF); 1472 memcpy(cverf, cp, NFSX_V3CREATEVERF); 1473 exclusive_flag = 1; 1474 break; 1475 }; 1476 va.va_type = VREG; 1477 } else { 1478 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1479 va.va_type = IFTOVT(fxdr_unsigned(u_int32_t, sp->sa_mode)); 1480 if (va.va_type == VNON) 1481 va.va_type = VREG; 1482 va.va_mode = nfstov_mode(sp->sa_mode); 1483 switch (va.va_type) { 1484 case VREG: 1485 tsize = fxdr_unsigned(int32_t, sp->sa_size); 1486 if (tsize != -1) 1487 va.va_size = (u_quad_t)tsize; 1488 break; 1489 case VCHR: 1490 case VBLK: 1491 case VFIFO: 1492 rdev = fxdr_unsigned(int32_t, sp->sa_size); 1493 break; 1494 default: 1495 break; 1496 }; 1497 } 1498 1499 /* 1500 * Iff doesn't exist, create it 1501 * otherwise just truncate to 0 length 1502 * should I set the mode too ?? 1503 */ 1504 if (nd.ni_vp == NULL) { 1505 if (va.va_type == VREG || va.va_type == VSOCK) { 1506 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1507 error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1508 if (!error) { 1509 if (exclusive_flag) { 1510 exclusive_flag = 0; 1511 vattr_null(&va); 1512 /* 1513 * XXX 1514 * assuming NFSX_V3CREATEVERF 1515 * == sizeof(nfstime3) 1516 */ 1517 fxdr_nfsv3time(cverf, &va.va_atime); 1518 error = VOP_SETATTR(nd.ni_vp, &va, 1519 cred); 1520 } 1521 } 1522 } else if (va.va_type == VCHR || va.va_type == VBLK || 1523 va.va_type == VFIFO) { 1524 if (va.va_type == VCHR && rdev == 0xffffffff) 1525 va.va_type = VFIFO; 1526 if (va.va_type != VFIFO && 1527 (error = kauth_authorize_system(cred, 1528 KAUTH_SYSTEM_MKNOD, 0, NULL, NULL, NULL))) { 1529 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1530 vput(nd.ni_dvp); 1531 abort = 0; 1532 nfsm_reply(0); 1533 if (nd.ni_pathbuf != NULL) { 1534 pathbuf_destroy(nd.ni_pathbuf); 1535 nd.ni_pathbuf = NULL; 1536 } 1537 return (error); 1538 } else 1539 va.va_rdev = (dev_t)rdev; 1540 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1541 error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, 1542 &va); 1543 if (error) { 1544 nfsm_reply(0); 1545 } 1546 } else { 1547 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1548 if (nd.ni_pathbuf != NULL) { 1549 pathbuf_destroy(nd.ni_pathbuf); 1550 nd.ni_pathbuf = NULL; 1551 } 1552 error = ENXIO; 1553 abort = 0; 1554 } 1555 vp = nd.ni_vp; 1556 } else { 1557 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1558 if (nd.ni_pathbuf != NULL) { 1559 pathbuf_destroy(nd.ni_pathbuf); 1560 nd.ni_pathbuf = NULL; 1561 } 1562 vp = nd.ni_vp; 1563 abort = 0; 1564 if (!error && va.va_size != -1) { 1565 error = nfsrv_access(vp, VWRITE, cred, 1566 (nd.ni_cnd.cn_flags & RDONLY), lwp, 0); 1567 if (!error) { 1568 nqsrv_getl(vp, ND_WRITE); 1569 tempsize = va.va_size; 1570 vattr_null(&va); 1571 va.va_size = tempsize; 1572 error = VOP_SETATTR(vp, &va, cred); 1573 } 1574 } 1575 if (error) 1576 vput(vp); 1577 } 1578 if (!error) { 1579 error = nfsrv_composefh(vp, &nsfh, v3); 1580 if (!error) 1581 error = VOP_GETATTR(vp, &va, cred); 1582 vput(vp); 1583 } 1584 if (nd.ni_dvp == vp) 1585 vrele(nd.ni_dvp); 1586 else 1587 vput(nd.ni_dvp); 1588 if (v3) { 1589 if (exclusive_flag && !error) { 1590 /* 1591 * XXX assuming NFSX_V3CREATEVERF == sizeof(nfstime3) 1592 */ 1593 char oldverf[NFSX_V3CREATEVERF]; 1594 1595 txdr_nfsv3time(&va.va_atime, oldverf); 1596 if (memcmp(cverf, oldverf, NFSX_V3CREATEVERF)) 1597 error = EEXIST; 1598 } 1599 if (dirp) { 1600 vn_lock(dirp, LK_SHARED | LK_RETRY); 1601 diraft_ret = VOP_GETATTR(dirp, &diraft, cred); 1602 VOP_UNLOCK(dirp); 1603 } 1604 } 1605 if (dirp) { 1606 vrele(dirp); 1607 dirp = NULL; 1608 } 1609 if (nd.ni_pathbuf != NULL) { 1610 pathbuf_destroy(nd.ni_pathbuf); 1611 nd.ni_pathbuf = NULL; 1612 } 1613 abort = 0; 1614 nfsm_reply(NFSX_SRVFH(&nsfh, v3) + NFSX_FATTR(v3) + NFSX_WCCDATA(v3)); 1615 if (v3) { 1616 if (!error) { 1617 nfsm_srvpostop_fh(&nsfh); 1618 nfsm_srvpostop_attr(0, &va); 1619 } 1620 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1621 } else { 1622 nfsm_srvfhtom(&nsfh, v3); 1623 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 1624 nfsm_srvfillattr(&va, fp); 1625 } 1626 return (0); 1627 nfsmout: 1628 if (dirp) 1629 vrele(dirp); 1630 if (abort) { 1631 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1632 if (nd.ni_dvp == nd.ni_vp) 1633 vrele(nd.ni_dvp); 1634 else 1635 vput(nd.ni_dvp); 1636 if (nd.ni_vp) 1637 vput(nd.ni_vp); 1638 } 1639 if (nd.ni_pathbuf != NULL) { 1640 pathbuf_destroy(nd.ni_pathbuf); 1641 nd.ni_pathbuf = NULL; 1642 } 1643 return (error); 1644 } 1645 1646 /* 1647 * nfs v3 mknod service 1648 */ 1649 int 1650 nfsrv_mknod(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 1651 { 1652 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1653 struct mbuf *nam = nfsd->nd_nam; 1654 char *dpos = nfsd->nd_dpos; 1655 kauth_cred_t cred = nfsd->nd_cr; 1656 struct vattr va, dirfor, diraft; 1657 u_int32_t *tl; 1658 struct nameidata nd; 1659 int32_t t1; 1660 char *bpos; 1661 int error = 0, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 1662 int abort = 0; 1663 u_int32_t major, minor; 1664 enum vtype vtyp; 1665 char *cp2; 1666 struct mbuf *mb, *mreq __unused; 1667 struct vnode *vp, *dirp = (struct vnode *)0; 1668 nfsrvfh_t nsfh; 1669 u_quad_t frev; 1670 1671 nd.ni_cnd.cn_nameiop = 0; 1672 nfsm_srvmtofh(&nsfh); 1673 nfsm_srvnamesiz(len); 1674 nd.ni_cnd.cn_cred = cred; 1675 nd.ni_cnd.cn_nameiop = CREATE; 1676 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 1677 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 1678 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 1679 if (dirp) 1680 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); 1681 if (error) { 1682 nfsm_reply(NFSX_WCCDATA(1)); 1683 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1684 if (dirp) 1685 vrele(dirp); 1686 if (nd.ni_pathbuf != NULL) { 1687 pathbuf_destroy(nd.ni_pathbuf); 1688 nd.ni_pathbuf = NULL; 1689 } 1690 return (0); 1691 } 1692 abort = 1; 1693 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1694 vtyp = nfsv3tov_type(*tl); 1695 if (vtyp != VCHR && vtyp != VBLK && vtyp != VSOCK && vtyp != VFIFO) { 1696 error = NFSERR_BADTYPE; 1697 goto abort; 1698 } 1699 vattr_null(&va); 1700 va.va_mode = 0; 1701 nfsm_srvsattr(&va); 1702 if (vtyp == VCHR || vtyp == VBLK) { 1703 dev_t rdev; 1704 1705 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1706 major = fxdr_unsigned(u_int32_t, *tl++); 1707 minor = fxdr_unsigned(u_int32_t, *tl); 1708 rdev = makedev(major, minor); 1709 if (major(rdev) != major || minor(rdev) != minor) { 1710 error = EINVAL; 1711 goto abort; 1712 } 1713 va.va_rdev = rdev; 1714 } 1715 1716 /* 1717 * Iff doesn't exist, create it. 1718 */ 1719 if (nd.ni_vp) { 1720 error = EEXIST; 1721 abort: 1722 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1723 if (nd.ni_vp) 1724 vput(nd.ni_vp); 1725 if (nd.ni_pathbuf != NULL) { 1726 pathbuf_destroy(nd.ni_pathbuf); 1727 nd.ni_pathbuf = NULL; 1728 } 1729 goto out; 1730 } 1731 va.va_type = vtyp; 1732 if (vtyp == VSOCK) { 1733 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1734 error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1735 } else { 1736 if (va.va_type != VFIFO && 1737 (error = kauth_authorize_system(cred, 1738 KAUTH_SYSTEM_MKNOD, 0, NULL, NULL, NULL))) { 1739 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1740 vput(nd.ni_dvp); 1741 goto out; 1742 } 1743 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1744 error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1745 if (error) 1746 goto out; 1747 } 1748 out: 1749 vp = nd.ni_vp; 1750 if (!error) { 1751 error = nfsrv_composefh(vp, &nsfh, true); 1752 if (!error) 1753 error = VOP_GETATTR(vp, &va, cred); 1754 vput(vp); 1755 } 1756 if (nd.ni_dvp == nd.ni_vp) 1757 vrele(nd.ni_dvp); 1758 else 1759 vput(nd.ni_dvp); 1760 if (dirp) { 1761 vn_lock(dirp, LK_SHARED | LK_RETRY); 1762 diraft_ret = VOP_GETATTR(dirp, &diraft, cred); 1763 VOP_UNLOCK(dirp); 1764 vrele(dirp); 1765 dirp = NULL; 1766 } 1767 if (nd.ni_pathbuf != NULL) { 1768 pathbuf_destroy(nd.ni_pathbuf); 1769 nd.ni_pathbuf = NULL; 1770 } 1771 abort = 0; 1772 nfsm_reply(NFSX_SRVFH(&nsfh, true) + NFSX_POSTOPATTR(1) + 1773 NFSX_WCCDATA(1)); 1774 if (!error) { 1775 nfsm_srvpostop_fh(&nsfh); 1776 nfsm_srvpostop_attr(0, &va); 1777 } 1778 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1779 return (0); 1780 nfsmout: 1781 if (abort) { 1782 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1783 if (nd.ni_dvp == nd.ni_vp) 1784 vrele(nd.ni_dvp); 1785 else 1786 vput(nd.ni_dvp); 1787 if (nd.ni_vp) 1788 vput(nd.ni_vp); 1789 } 1790 if (nd.ni_pathbuf != NULL) { 1791 pathbuf_destroy(nd.ni_pathbuf); 1792 nd.ni_pathbuf = NULL; 1793 } 1794 if (dirp) 1795 vrele(dirp); 1796 return (error); 1797 } 1798 1799 /* 1800 * nfs remove service 1801 */ 1802 int 1803 nfsrv_remove(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 1804 { 1805 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1806 struct mbuf *nam = nfsd->nd_nam; 1807 char *dpos = nfsd->nd_dpos; 1808 kauth_cred_t cred = nfsd->nd_cr; 1809 struct nameidata nd; 1810 u_int32_t *tl; 1811 int32_t t1; 1812 char *bpos; 1813 int error = 0, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 1814 int v3 = (nfsd->nd_flag & ND_NFSV3); 1815 char *cp2; 1816 struct mbuf *mb, *mreq __unused; 1817 struct vnode *vp, *dirp; 1818 struct vattr dirfor, diraft; 1819 nfsrvfh_t nsfh; 1820 u_quad_t frev; 1821 1822 #ifndef nolint 1823 vp = (struct vnode *)0; 1824 #endif 1825 nfsm_srvmtofh(&nsfh); 1826 nfsm_srvnamesiz(len); 1827 nd.ni_cnd.cn_cred = cred; 1828 nd.ni_cnd.cn_nameiop = DELETE; 1829 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 1830 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 1831 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 1832 if (error == 0 && dirp && v3) { 1833 if (nd.ni_dvp == nd.ni_vp) 1834 vn_lock(dirp, LK_SHARED | LK_RETRY); 1835 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); 1836 if (nd.ni_dvp == nd.ni_vp) 1837 VOP_UNLOCK(dirp); 1838 } 1839 if (!error) { 1840 vp = nd.ni_vp; 1841 if (vp->v_type == VDIR) { 1842 error = EPERM; 1843 goto out; 1844 } 1845 /* 1846 * The root of a mounted filesystem cannot be deleted. 1847 */ 1848 if (vp->v_vflag & VV_ROOT) { 1849 error = EBUSY; 1850 } 1851 out: 1852 if (!error) { 1853 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1854 nqsrv_getl(vp, ND_WRITE); 1855 error = VOP_REMOVE(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); 1856 } else { 1857 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1858 if (nd.ni_dvp == vp) 1859 vrele(nd.ni_dvp); 1860 else 1861 vput(nd.ni_dvp); 1862 vput(vp); 1863 } 1864 } 1865 if (nd.ni_pathbuf != NULL) { 1866 pathbuf_destroy(nd.ni_pathbuf); 1867 nd.ni_pathbuf = NULL; 1868 } 1869 if (dirp) { 1870 if (v3) { 1871 vn_lock(dirp, LK_SHARED | LK_RETRY); 1872 diraft_ret = VOP_GETATTR(dirp, &diraft, cred); 1873 VOP_UNLOCK(dirp); 1874 } 1875 vrele(dirp); 1876 } 1877 nfsm_reply(NFSX_WCCDATA(v3)); 1878 if (v3) { 1879 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1880 return (0); 1881 } 1882 nfsm_srvdone; 1883 } 1884 1885 /* 1886 * nfs rename service 1887 */ 1888 int 1889 nfsrv_rename(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 1890 { 1891 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1892 struct mbuf *nam = nfsd->nd_nam; 1893 char *dpos = nfsd->nd_dpos; 1894 kauth_cred_t cred = nfsd->nd_cr; 1895 u_int32_t *tl; 1896 int32_t t1; 1897 char *bpos; 1898 int error = 0, cache = 0, fdirfor_ret = 1, fdiraft_ret = 1; 1899 uint32_t len, len2; 1900 int tdirfor_ret = 1, tdiraft_ret = 1; 1901 int v3 = (nfsd->nd_flag & ND_NFSV3); 1902 char *cp2; 1903 struct mbuf *mb, *mreq __unused; 1904 struct nameidata fromnd, tond; 1905 struct vnode *fvp, *tvp, *tdvp; 1906 struct vnode *fdirp = NULL, *tdirp = NULL; 1907 struct mount *localfs = NULL; 1908 struct vattr fdirfor, fdiraft, tdirfor, tdiraft; 1909 nfsrvfh_t fnsfh, tnsfh; 1910 u_quad_t frev; 1911 uid_t saved_uid; 1912 1913 #ifndef nolint 1914 fvp = (struct vnode *)0; 1915 #endif 1916 fromnd.ni_cnd.cn_nameiop = 0; 1917 tond.ni_cnd.cn_nameiop = 0; 1918 nfsm_srvmtofh(&fnsfh); 1919 nfsm_srvnamesiz(len); 1920 /* 1921 * Remember our original uid so that we can reset cr_uid before 1922 * the second nfs_namei() call, in case it is remapped. 1923 */ 1924 saved_uid = kauth_cred_geteuid(cred); 1925 fromnd.ni_cnd.cn_cred = cred; 1926 fromnd.ni_cnd.cn_nameiop = DELETE; 1927 fromnd.ni_cnd.cn_flags = LOCKPARENT | INRENAME; 1928 error = nfs_namei(&fromnd, &fnsfh, len, slp, nam, &md, 1929 &dpos, &fdirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 1930 if (error == 0 && fdirp && v3) { 1931 if (fromnd.ni_dvp == fromnd.ni_vp) 1932 vn_lock(fdirp, LK_SHARED | LK_RETRY); 1933 fdirfor_ret = VOP_GETATTR(fdirp, &fdirfor, cred); 1934 if (fromnd.ni_dvp == fromnd.ni_vp) 1935 VOP_UNLOCK(fdirp); 1936 } 1937 if (error) { 1938 fromnd.ni_cnd.cn_nameiop = 0; 1939 nfsm_reply(2 * NFSX_WCCDATA(v3)); 1940 nfsm_srvwcc_data(fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft); 1941 nfsm_srvwcc_data(tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft); 1942 if (fdirp) 1943 vrele(fdirp); 1944 if (fromnd.ni_pathbuf != NULL) { 1945 pathbuf_destroy(fromnd.ni_pathbuf); 1946 } 1947 return (0); 1948 } 1949 if (fromnd.ni_dvp != fromnd.ni_vp) { 1950 VOP_UNLOCK(fromnd.ni_dvp); 1951 } 1952 fvp = fromnd.ni_vp; 1953 1954 localfs = fvp->v_mount; 1955 error = VFS_RENAMELOCK_ENTER(localfs); 1956 if (error) { 1957 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 1958 vrele(fromnd.ni_dvp); 1959 vrele(fvp); 1960 goto out1; 1961 } 1962 1963 /* Copied, regrettably, from vfs_syscalls.c (q.v.) */ 1964 vrele(fvp); 1965 if ((fromnd.ni_cnd.cn_namelen == 1 && 1966 fromnd.ni_cnd.cn_nameptr[0] == '.') || 1967 (fromnd.ni_cnd.cn_namelen == 2 && 1968 fromnd.ni_cnd.cn_nameptr[0] == '.' && 1969 fromnd.ni_cnd.cn_nameptr[1] == '.')) { 1970 error = EINVAL; 1971 VFS_RENAMELOCK_EXIT(localfs); 1972 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 1973 vrele(fromnd.ni_dvp); 1974 goto out1; 1975 } 1976 vn_lock(fromnd.ni_dvp, LK_EXCLUSIVE | LK_RETRY); 1977 error = relookup(fromnd.ni_dvp, &fromnd.ni_vp, &fromnd.ni_cnd, 0); 1978 if (error) { 1979 VOP_UNLOCK(fromnd.ni_dvp); 1980 VFS_RENAMELOCK_EXIT(localfs); 1981 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 1982 vrele(fromnd.ni_dvp); 1983 goto out1; 1984 } 1985 VOP_UNLOCK(fromnd.ni_vp); 1986 if (fromnd.ni_dvp != fromnd.ni_vp) 1987 VOP_UNLOCK(fromnd.ni_dvp); 1988 fvp = fromnd.ni_vp; 1989 1990 nfsm_srvmtofh(&tnsfh); 1991 if (v3) { 1992 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 1993 len2 = fxdr_unsigned(uint32_t, *tl); 1994 /* len2 will be checked by nfs_namei */ 1995 } 1996 else { 1997 /* NFSv2 */ 1998 nfsm_strsiz(len2, NFS_MAXNAMLEN); 1999 } 2000 kauth_cred_seteuid(cred, saved_uid); 2001 tond.ni_cnd.cn_cred = cred; 2002 tond.ni_cnd.cn_nameiop = RENAME; 2003 tond.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF | NOCACHE | INRENAME; 2004 error = nfs_namei(&tond, &tnsfh, len2, slp, nam, &md, 2005 &dpos, &tdirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 2006 if (tdirp && v3) { 2007 tdirfor_ret = VOP_GETATTR(tdirp, &tdirfor, cred); 2008 } 2009 if (error) { 2010 VFS_RENAMELOCK_EXIT(localfs); 2011 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 2012 vrele(fromnd.ni_dvp); 2013 vrele(fvp); 2014 goto out1; 2015 } 2016 tdvp = tond.ni_dvp; 2017 tvp = tond.ni_vp; 2018 if (tvp != NULL) { 2019 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 2020 if (v3) 2021 error = EEXIST; 2022 else 2023 error = EISDIR; 2024 goto out; 2025 } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 2026 if (v3) 2027 error = EEXIST; 2028 else 2029 error = ENOTDIR; 2030 goto out; 2031 } 2032 if (tvp->v_type == VDIR && tvp->v_mountedhere) { 2033 if (v3) 2034 error = EXDEV; 2035 else 2036 error = ENOTEMPTY; 2037 goto out; 2038 } 2039 } 2040 if (fvp->v_type == VDIR && fvp->v_mountedhere) { 2041 if (v3) 2042 error = EXDEV; 2043 else 2044 error = ENOTEMPTY; 2045 goto out; 2046 } 2047 if (fvp->v_mount != tdvp->v_mount) { 2048 if (v3) 2049 error = EXDEV; 2050 else 2051 error = ENOTEMPTY; 2052 goto out; 2053 } 2054 if (fvp == tdvp) { 2055 if (v3) 2056 error = EINVAL; 2057 else 2058 error = ENOTEMPTY; 2059 } 2060 /* 2061 * If source is the same as the destination (that is the 2062 * same vnode with the same name in the same directory), 2063 * then there is nothing to do. 2064 */ 2065 if (fvp == tvp && fromnd.ni_dvp == tdvp && 2066 fromnd.ni_cnd.cn_namelen == tond.ni_cnd.cn_namelen && 2067 !memcmp(fromnd.ni_cnd.cn_nameptr, tond.ni_cnd.cn_nameptr, 2068 fromnd.ni_cnd.cn_namelen)) 2069 error = -1; 2070 out: 2071 if (!error) { 2072 nqsrv_getl(fromnd.ni_dvp, ND_WRITE); 2073 nqsrv_getl(tdvp, ND_WRITE); 2074 if (tvp) { 2075 nqsrv_getl(tvp, ND_WRITE); 2076 } 2077 error = VOP_RENAME(fromnd.ni_dvp, fromnd.ni_vp, &fromnd.ni_cnd, 2078 tond.ni_dvp, tond.ni_vp, &tond.ni_cnd); 2079 VFS_RENAMELOCK_EXIT(localfs); 2080 } else { 2081 VOP_ABORTOP(tond.ni_dvp, &tond.ni_cnd); 2082 if (tdvp == tvp) 2083 vrele(tdvp); 2084 else 2085 vput(tdvp); 2086 if (tvp) 2087 vput(tvp); 2088 VFS_RENAMELOCK_EXIT(localfs); 2089 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 2090 vrele(fromnd.ni_dvp); 2091 vrele(fvp); 2092 if (error == -1) 2093 error = 0; 2094 } 2095 if (tond.ni_pathbuf != NULL) { 2096 pathbuf_destroy(tond.ni_pathbuf); 2097 tond.ni_pathbuf = NULL; 2098 } 2099 tond.ni_cnd.cn_nameiop = 0; 2100 out1: 2101 if (fdirp) { 2102 if (v3) { 2103 vn_lock(fdirp, LK_SHARED | LK_RETRY); 2104 fdiraft_ret = VOP_GETATTR(fdirp, &fdiraft, cred); 2105 VOP_UNLOCK(fdirp); 2106 } 2107 vrele(fdirp); 2108 fdirp = NULL; 2109 } 2110 if (tdirp) { 2111 if (v3) { 2112 vn_lock(tdirp, LK_SHARED | LK_RETRY); 2113 tdiraft_ret = VOP_GETATTR(tdirp, &tdiraft, cred); 2114 VOP_UNLOCK(tdirp); 2115 } 2116 vrele(tdirp); 2117 tdirp = NULL; 2118 } 2119 pathbuf_destroy(fromnd.ni_pathbuf); 2120 fromnd.ni_pathbuf = NULL; 2121 fromnd.ni_cnd.cn_nameiop = 0; 2122 localfs = NULL; 2123 nfsm_reply(2 * NFSX_WCCDATA(v3)); 2124 if (v3) { 2125 nfsm_srvwcc_data(fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft); 2126 nfsm_srvwcc_data(tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft); 2127 } 2128 return (0); 2129 2130 nfsmout: 2131 if (fdirp) 2132 vrele(fdirp); 2133 #ifdef notdef 2134 if (tdirp) 2135 vrele(tdirp); 2136 #endif 2137 if (tond.ni_cnd.cn_nameiop) { 2138 if (tond.ni_pathbuf != NULL) { 2139 pathbuf_destroy(tond.ni_pathbuf); 2140 tond.ni_pathbuf = NULL; 2141 } 2142 } 2143 if (localfs) { 2144 VFS_RENAMELOCK_EXIT(localfs); 2145 } 2146 if (fromnd.ni_cnd.cn_nameiop) { 2147 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 2148 if (fromnd.ni_pathbuf != NULL) { 2149 pathbuf_destroy(fromnd.ni_pathbuf); 2150 fromnd.ni_pathbuf = NULL; 2151 } 2152 vrele(fromnd.ni_dvp); 2153 vrele(fvp); 2154 } 2155 return (error); 2156 } 2157 2158 /* 2159 * nfs link service 2160 */ 2161 int 2162 nfsrv_link(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 2163 { 2164 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2165 struct mbuf *nam = nfsd->nd_nam; 2166 char *dpos = nfsd->nd_dpos; 2167 kauth_cred_t cred = nfsd->nd_cr; 2168 struct nameidata nd; 2169 u_int32_t *tl; 2170 int32_t t1; 2171 char *bpos; 2172 int error = 0, rdonly, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 2173 int getret = 1, v3 = (nfsd->nd_flag & ND_NFSV3); 2174 char *cp2; 2175 struct mbuf *mb, *mreq __unused; 2176 struct vnode *vp, *xp, *dirp = (struct vnode *)0; 2177 struct vattr dirfor, diraft, at; 2178 nfsrvfh_t nsfh, dnsfh; 2179 u_quad_t frev; 2180 2181 nfsm_srvmtofh(&nsfh); 2182 nfsm_srvmtofh(&dnsfh); 2183 nfsm_srvnamesiz(len); 2184 error = nfsrv_fhtovp(&nsfh, false, &vp, cred, slp, nam, 2185 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 2186 if (error) { 2187 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2188 nfsm_srvpostop_attr(getret, &at); 2189 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2190 return (0); 2191 } 2192 if (vp->v_type == VDIR) { 2193 error = EPERM; 2194 goto out1; 2195 } 2196 nd.ni_cnd.cn_cred = cred; 2197 nd.ni_cnd.cn_nameiop = CREATE; 2198 nd.ni_cnd.cn_flags = LOCKPARENT; 2199 error = nfs_namei(&nd, &dnsfh, len, slp, nam, &md, &dpos, 2200 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 2201 if (dirp && v3) { 2202 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); 2203 } 2204 if (error) 2205 goto out1; 2206 xp = nd.ni_vp; 2207 if (xp != NULL) { 2208 error = EEXIST; 2209 goto out; 2210 } 2211 xp = nd.ni_dvp; 2212 if (vp->v_mount != xp->v_mount) 2213 error = EXDEV; 2214 out: 2215 if (!error) { 2216 nqsrv_getl(vp, ND_WRITE); 2217 nqsrv_getl(xp, ND_WRITE); 2218 error = VOP_LINK(nd.ni_dvp, vp, &nd.ni_cnd); 2219 } else { 2220 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2221 if (nd.ni_dvp == nd.ni_vp) 2222 vrele(nd.ni_dvp); 2223 else 2224 vput(nd.ni_dvp); 2225 if (nd.ni_vp) 2226 vrele(nd.ni_vp); 2227 } 2228 out1: 2229 if (v3) { 2230 vn_lock(vp, LK_SHARED | LK_RETRY); 2231 getret = VOP_GETATTR(vp, &at, cred); 2232 VOP_UNLOCK(vp); 2233 } 2234 if (dirp) { 2235 if (v3) { 2236 vn_lock(dirp, LK_SHARED | LK_RETRY); 2237 diraft_ret = VOP_GETATTR(dirp, &diraft, cred); 2238 VOP_UNLOCK(dirp); 2239 } 2240 vrele(dirp); 2241 } 2242 vrele(vp); 2243 if (nd.ni_pathbuf != NULL) { 2244 pathbuf_destroy(nd.ni_pathbuf); 2245 nd.ni_pathbuf = NULL; 2246 } 2247 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2248 if (v3) { 2249 nfsm_srvpostop_attr(getret, &at); 2250 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2251 return (0); 2252 } 2253 nfsm_srvdone; 2254 } 2255 2256 /* 2257 * nfs symbolic link service 2258 */ 2259 int 2260 nfsrv_symlink(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 2261 { 2262 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2263 struct mbuf *nam = nfsd->nd_nam; 2264 char *dpos = nfsd->nd_dpos; 2265 kauth_cred_t cred = nfsd->nd_cr; 2266 struct vattr va, dirfor, diraft; 2267 struct nameidata nd; 2268 u_int32_t *tl; 2269 int32_t t1; 2270 struct nfsv2_sattr *sp; 2271 char *bpos, *pathcp = NULL, *cp2; 2272 struct uio io; 2273 struct iovec iv; 2274 int error = 0, cache = 0, dirfor_ret = 1, diraft_ret = 1, abort = 0; 2275 uint32_t len, len2; 2276 int v3 = (nfsd->nd_flag & ND_NFSV3); 2277 struct mbuf *mb, *mreq __unused; 2278 struct vnode *dirp = (struct vnode *)0; 2279 nfsrvfh_t nsfh; 2280 u_quad_t frev; 2281 2282 nd.ni_cnd.cn_nameiop = 0; 2283 nfsm_srvmtofh(&nsfh); 2284 nfsm_srvnamesiz(len); 2285 nd.ni_cnd.cn_cred = cred; 2286 nd.ni_cnd.cn_nameiop = CREATE; 2287 nd.ni_cnd.cn_flags = LOCKPARENT; 2288 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 2289 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 2290 if (dirp && v3) { 2291 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); 2292 } 2293 if (error) 2294 goto out; 2295 abort = 1; 2296 vattr_null(&va); 2297 va.va_type = VLNK; 2298 if (v3) { 2299 va.va_mode = 0; 2300 nfsm_srvsattr(&va); 2301 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 2302 len2 = fxdr_unsigned(uint32_t, *tl); 2303 if (len2 > PATH_MAX) { 2304 /* XXX should check _PC_NO_TRUNC */ 2305 error = ENAMETOOLONG; 2306 goto abortop; 2307 } 2308 } 2309 else { 2310 /* NFSv2 */ 2311 nfsm_strsiz(len2, NFS_MAXPATHLEN); 2312 } 2313 pathcp = malloc(len2 + 1, M_TEMP, M_WAITOK); 2314 iv.iov_base = pathcp; 2315 iv.iov_len = len2; 2316 io.uio_resid = len2; 2317 io.uio_offset = 0; 2318 io.uio_iov = &iv; 2319 io.uio_iovcnt = 1; 2320 io.uio_rw = UIO_READ; 2321 UIO_SETUP_SYSSPACE(&io); 2322 nfsm_mtouio(&io, len2); 2323 if (!v3) { 2324 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2325 va.va_mode = fxdr_unsigned(u_int16_t, sp->sa_mode); 2326 } 2327 *(pathcp + len2) = '\0'; 2328 if (nd.ni_vp) { 2329 error = EEXIST; 2330 abortop: 2331 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2332 if (nd.ni_dvp == nd.ni_vp) 2333 vrele(nd.ni_dvp); 2334 else 2335 vput(nd.ni_dvp); 2336 if (nd.ni_vp) 2337 vrele(nd.ni_vp); 2338 goto out; 2339 } 2340 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2341 error = VOP_SYMLINK(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va, pathcp); 2342 if (!error) { 2343 if (v3) { 2344 error = nfsrv_composefh(nd.ni_vp, &nsfh, v3); 2345 if (!error) 2346 error = VOP_GETATTR(nd.ni_vp, &va, cred); 2347 vput(nd.ni_vp); 2348 } else { 2349 vput(nd.ni_vp); 2350 } 2351 } 2352 vput(nd.ni_dvp); 2353 out: 2354 if (pathcp) 2355 free(pathcp, M_TEMP); 2356 if (dirp) { 2357 if (v3) { 2358 vn_lock(dirp, LK_SHARED | LK_RETRY); 2359 diraft_ret = VOP_GETATTR(dirp, &diraft, cred); 2360 VOP_UNLOCK(dirp); 2361 } 2362 vrele(dirp); 2363 dirp = NULL; 2364 } 2365 if (nd.ni_pathbuf != NULL) { 2366 pathbuf_destroy(nd.ni_pathbuf); 2367 nd.ni_pathbuf = NULL; 2368 } 2369 abort = 0; 2370 nfsm_reply(NFSX_SRVFH(&nsfh, v3) + NFSX_POSTOPATTR(v3) + 2371 NFSX_WCCDATA(v3)); 2372 if (v3) { 2373 if (!error) { 2374 nfsm_srvpostop_fh(&nsfh); 2375 nfsm_srvpostop_attr(0, &va); 2376 } 2377 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2378 } 2379 return (0); 2380 nfsmout: 2381 if (abort) { 2382 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2383 if (nd.ni_dvp == nd.ni_vp) 2384 vrele(nd.ni_dvp); 2385 else 2386 vput(nd.ni_dvp); 2387 if (nd.ni_vp) 2388 vrele(nd.ni_vp); 2389 if (nd.ni_pathbuf != NULL) { 2390 pathbuf_destroy(nd.ni_pathbuf); 2391 nd.ni_pathbuf = NULL; 2392 } 2393 } 2394 if (dirp) 2395 vrele(dirp); 2396 if (pathcp) 2397 free(pathcp, M_TEMP); 2398 return (error); 2399 } 2400 2401 /* 2402 * nfs mkdir service 2403 */ 2404 int 2405 nfsrv_mkdir(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 2406 { 2407 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2408 struct mbuf *nam = nfsd->nd_nam; 2409 char *dpos = nfsd->nd_dpos; 2410 kauth_cred_t cred = nfsd->nd_cr; 2411 struct vattr va, dirfor, diraft; 2412 struct nfs_fattr *fp; 2413 struct nameidata nd; 2414 char *cp; 2415 u_int32_t *tl; 2416 int32_t t1; 2417 char *bpos; 2418 int error = 0, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 2419 int abort = 0; 2420 int v3 = (nfsd->nd_flag & ND_NFSV3); 2421 char *cp2; 2422 struct mbuf *mb, *mreq __unused; 2423 struct vnode *vp, *dirp = (struct vnode *)0; 2424 nfsrvfh_t nsfh; 2425 u_quad_t frev; 2426 2427 nfsm_srvmtofh(&nsfh); 2428 nfsm_srvnamesiz(len); 2429 nd.ni_cnd.cn_cred = cred; 2430 nd.ni_cnd.cn_nameiop = CREATE; 2431 nd.ni_cnd.cn_flags = LOCKPARENT; 2432 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 2433 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 2434 if (dirp && v3) { 2435 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); 2436 } 2437 if (error) { 2438 if (nd.ni_pathbuf != NULL) { 2439 pathbuf_destroy(nd.ni_pathbuf); 2440 nd.ni_pathbuf = NULL; 2441 } 2442 nfsm_reply(NFSX_WCCDATA(v3)); 2443 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2444 if (dirp) 2445 vrele(dirp); 2446 return (0); 2447 } 2448 abort = 1; 2449 vattr_null(&va); 2450 if (v3) { 2451 va.va_mode = 0; 2452 nfsm_srvsattr(&va); 2453 } else { 2454 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2455 va.va_mode = nfstov_mode(*tl++); 2456 } 2457 va.va_type = VDIR; 2458 vp = nd.ni_vp; 2459 if (vp != NULL) { 2460 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2461 if (nd.ni_dvp == vp) 2462 vrele(nd.ni_dvp); 2463 else 2464 vput(nd.ni_dvp); 2465 vrele(vp); 2466 error = EEXIST; 2467 goto out; 2468 } 2469 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2470 error = VOP_MKDIR(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 2471 if (!error) { 2472 vp = nd.ni_vp; 2473 error = nfsrv_composefh(vp, &nsfh, v3); 2474 if (!error) 2475 error = VOP_GETATTR(vp, &va, cred); 2476 vput(vp); 2477 } 2478 vput(nd.ni_dvp); 2479 out: 2480 if (dirp) { 2481 if (v3) { 2482 vn_lock(dirp, LK_SHARED | LK_RETRY); 2483 diraft_ret = VOP_GETATTR(dirp, &diraft, cred); 2484 VOP_UNLOCK(dirp); 2485 } 2486 vrele(dirp); 2487 dirp = NULL; 2488 } 2489 if (nd.ni_pathbuf != NULL) { 2490 pathbuf_destroy(nd.ni_pathbuf); 2491 nd.ni_pathbuf = NULL; 2492 } 2493 abort = 0; 2494 nfsm_reply(NFSX_SRVFH(&nsfh, v3) + NFSX_POSTOPATTR(v3) + 2495 NFSX_WCCDATA(v3)); 2496 if (v3) { 2497 if (!error) { 2498 nfsm_srvpostop_fh(&nsfh); 2499 nfsm_srvpostop_attr(0, &va); 2500 } 2501 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2502 } else { 2503 nfsm_srvfhtom(&nsfh, v3); 2504 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 2505 nfsm_srvfillattr(&va, fp); 2506 } 2507 return (0); 2508 nfsmout: 2509 if (abort) { 2510 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2511 if (nd.ni_dvp == nd.ni_vp) 2512 vrele(nd.ni_dvp); 2513 else 2514 vput(nd.ni_dvp); 2515 if (nd.ni_vp) 2516 vrele(nd.ni_vp); 2517 if (nd.ni_pathbuf != NULL) { 2518 pathbuf_destroy(nd.ni_pathbuf); 2519 nd.ni_pathbuf = NULL; 2520 } 2521 } 2522 if (dirp) 2523 vrele(dirp); 2524 return (error); 2525 } 2526 2527 /* 2528 * nfs rmdir service 2529 */ 2530 int 2531 nfsrv_rmdir(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 2532 { 2533 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2534 struct mbuf *nam = nfsd->nd_nam; 2535 char *dpos = nfsd->nd_dpos; 2536 kauth_cred_t cred = nfsd->nd_cr; 2537 u_int32_t *tl; 2538 int32_t t1; 2539 char *bpos; 2540 int error = 0, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 2541 int v3 = (nfsd->nd_flag & ND_NFSV3); 2542 char *cp2; 2543 struct mbuf *mb, *mreq __unused; 2544 struct vnode *vp, *dirp = (struct vnode *)0; 2545 struct vattr dirfor, diraft; 2546 nfsrvfh_t nsfh; 2547 struct nameidata nd; 2548 u_quad_t frev; 2549 2550 nfsm_srvmtofh(&nsfh); 2551 nfsm_srvnamesiz(len); 2552 nd.ni_cnd.cn_cred = cred; 2553 nd.ni_cnd.cn_nameiop = DELETE; 2554 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 2555 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 2556 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 2557 if (dirp && v3) { 2558 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); 2559 } 2560 if (error) { 2561 if (nd.ni_pathbuf != NULL) { 2562 pathbuf_destroy(nd.ni_pathbuf); 2563 nd.ni_pathbuf = NULL; 2564 } 2565 nfsm_reply(NFSX_WCCDATA(v3)); 2566 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2567 if (dirp) 2568 vrele(dirp); 2569 return (0); 2570 } 2571 vp = nd.ni_vp; 2572 if (vp->v_type != VDIR) { 2573 error = ENOTDIR; 2574 goto out; 2575 } 2576 /* 2577 * No rmdir "." please. 2578 */ 2579 if (nd.ni_dvp == vp) { 2580 error = EINVAL; 2581 goto out; 2582 } 2583 /* 2584 * The root of a mounted filesystem cannot be deleted. 2585 */ 2586 if (vp->v_vflag & VV_ROOT) 2587 error = EBUSY; 2588 out: 2589 if (!error) { 2590 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2591 nqsrv_getl(vp, ND_WRITE); 2592 error = VOP_RMDIR(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); 2593 } else { 2594 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2595 if (nd.ni_dvp == nd.ni_vp) 2596 vrele(nd.ni_dvp); 2597 else 2598 vput(nd.ni_dvp); 2599 vput(vp); 2600 } 2601 if (nd.ni_pathbuf != NULL) { 2602 pathbuf_destroy(nd.ni_pathbuf); 2603 nd.ni_pathbuf = NULL; 2604 } 2605 if (dirp) { 2606 if (v3) { 2607 vn_lock(dirp, LK_SHARED | LK_RETRY); 2608 diraft_ret = VOP_GETATTR(dirp, &diraft, cred); 2609 VOP_UNLOCK(dirp); 2610 } 2611 vrele(dirp); 2612 } 2613 nfsm_reply(NFSX_WCCDATA(v3)); 2614 if (v3) { 2615 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2616 return (0); 2617 } 2618 nfsm_srvdone; 2619 } 2620 2621 /* 2622 * nfs readdir service 2623 * - mallocs what it thinks is enough to read 2624 * count rounded up to a multiple of NFS_SRVDIRBLKSIZ <= NFS_MAXREADDIR 2625 * - calls VOP_READDIR() 2626 * - loops around building the reply 2627 * if the output generated exceeds count break out of loop 2628 * The nfsm_clget macro is used here so that the reply will be packed 2629 * tightly in mbuf clusters. 2630 * - it only knows that it has encountered eof when the VOP_READDIR() 2631 * reads nothing 2632 * - as such one readdir rpc will return eof false although you are there 2633 * and then the next will return eof 2634 * - it trims out records with d_fileno == 0 2635 * this doesn't matter for Unix clients, but they might confuse clients 2636 * for other os'. 2637 * - it trims out records with d_type == DT_WHT 2638 * these cannot be seen through NFS (unless we extend the protocol) 2639 * NB: It is tempting to set eof to true if the VOP_READDIR() reads less 2640 * than requested, but this may not apply to all filesystems. For 2641 * example, client NFS does not { although it is never remote mounted 2642 * anyhow } 2643 * The alternate call nfsrv_readdirplus() does lookups as well. 2644 * PS: The NFS protocol spec. does not clarify what the "count" byte 2645 * argument is a count of.. just name strings and file id's or the 2646 * entire reply rpc or ... 2647 * I tried just file name and id sizes and it confused the Sun client, 2648 * so I am using the full rpc size now. The "paranoia.." comment refers 2649 * to including the status longwords that are not a part of the dir. 2650 * "entry" structures, but are in the rpc. 2651 */ 2652 2653 #define NFS_SRVDIRBLKSIZ 1024 2654 2655 struct flrep { 2656 nfsuint64 fl_off; 2657 u_int32_t fl_postopok; 2658 struct nfs_fattr fl_fattr; /* XXX: must be of fattr3 size */ 2659 u_int32_t fl_fhok; 2660 u_int32_t fl_fhsize; 2661 /* handle comes here, filled in dynamically */ 2662 }; 2663 2664 int 2665 nfsrv_readdir(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 2666 { 2667 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2668 struct mbuf *nam = nfsd->nd_nam; 2669 char *dpos = nfsd->nd_dpos; 2670 kauth_cred_t cred = nfsd->nd_cr; 2671 char *bp, *be; 2672 struct mbuf *mp; 2673 struct dirent *dp; 2674 char *cp; 2675 u_int32_t *tl; 2676 int32_t t1; 2677 char *bpos; 2678 struct mbuf *mb, *mreq __unused, *mp2; 2679 char *cpos, *cend, *cp2, *rbuf; 2680 struct vnode *vp; 2681 struct vattr at; 2682 nfsrvfh_t nsfh; 2683 struct uio io; 2684 struct iovec iv; 2685 int len, nlen, rem, xfer, tsiz, i, error = 0, getret = 1; 2686 int siz, cnt, fullsiz, eofflag, rdonly, cache = 0, ncookies; 2687 int v3 = (nfsd->nd_flag & ND_NFSV3); 2688 u_quad_t frev, off, toff; 2689 #ifdef NFS3_STRICTVERF 2690 u_quad_t verf; 2691 #endif 2692 off_t *cookies = NULL, *cookiep; 2693 nfsuint64 jar; 2694 2695 nfsm_srvmtofh(&nsfh); 2696 if (v3) { 2697 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 2698 toff = fxdr_hyper(tl); 2699 tl += 2; 2700 #ifdef NFS3_STRICTVERF 2701 verf = fxdr_hyper(tl); 2702 #endif 2703 tl += 2; 2704 } else { 2705 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2706 toff = fxdr_unsigned(u_quad_t, *tl++); 2707 } 2708 off = toff; 2709 cnt = fxdr_unsigned(int, *tl); 2710 siz = ((cnt + NFS_SRVDIRBLKSIZ - 1) & ~(NFS_SRVDIRBLKSIZ - 1)); 2711 xfer = NFS_SRVMAXDATA(nfsd); 2712 if (siz > xfer) 2713 siz = xfer; 2714 fullsiz = siz; 2715 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 2716 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 2717 if (!error && vp->v_type != VDIR) { 2718 error = ENOTDIR; 2719 vput(vp); 2720 } 2721 if (error) { 2722 nfsm_reply(NFSX_UNSIGNED); 2723 nfsm_srvpostop_attr(getret, &at); 2724 return (0); 2725 } 2726 nqsrv_getl(vp, ND_READ); 2727 if (v3) { 2728 error = getret = VOP_GETATTR(vp, &at, cred); 2729 #ifdef NFS3_STRICTVERF 2730 /* 2731 * XXX This check is too strict for Solaris 2.5 clients. 2732 */ 2733 if (!error && toff && verf != at.va_filerev) 2734 error = NFSERR_BAD_COOKIE; 2735 #endif 2736 } 2737 if (!error) 2738 error = nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 0); 2739 if (error) { 2740 vput(vp); 2741 nfsm_reply(NFSX_POSTOPATTR(v3)); 2742 nfsm_srvpostop_attr(getret, &at); 2743 return (0); 2744 } 2745 VOP_UNLOCK(vp); 2746 rbuf = malloc(siz, M_TEMP, M_WAITOK); 2747 again: 2748 iv.iov_base = rbuf; 2749 iv.iov_len = fullsiz; 2750 io.uio_iov = &iv; 2751 io.uio_iovcnt = 1; 2752 io.uio_offset = (off_t)off; 2753 io.uio_resid = fullsiz; 2754 io.uio_rw = UIO_READ; 2755 UIO_SETUP_SYSSPACE(&io); 2756 eofflag = 0; 2757 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2758 2759 error = VOP_READDIR(vp, &io, cred, &eofflag, &cookies, &ncookies); 2760 2761 off = (off_t)io.uio_offset; 2762 if (!cookies && !error) 2763 error = NFSERR_PERM; 2764 if (v3) { 2765 getret = VOP_GETATTR(vp, &at, cred); 2766 if (!error) 2767 error = getret; 2768 } 2769 2770 VOP_UNLOCK(vp); 2771 if (error) { 2772 vrele(vp); 2773 free((void *)rbuf, M_TEMP); 2774 if (cookies) 2775 free((void *)cookies, M_TEMP); 2776 nfsm_reply(NFSX_POSTOPATTR(v3)); 2777 nfsm_srvpostop_attr(getret, &at); 2778 return (0); 2779 } 2780 if (io.uio_resid) { 2781 siz -= io.uio_resid; 2782 2783 /* 2784 * If nothing read, return eof 2785 * rpc reply 2786 */ 2787 if (siz == 0) { 2788 vrele(vp); 2789 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_COOKIEVERF(v3) + 2790 2 * NFSX_UNSIGNED); 2791 if (v3) { 2792 nfsm_srvpostop_attr(getret, &at); 2793 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 2794 txdr_hyper(at.va_filerev, tl); 2795 tl += 2; 2796 } else 2797 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2798 *tl++ = nfs_false; 2799 *tl = nfs_true; 2800 free((void *)rbuf, M_TEMP); 2801 free((void *)cookies, M_TEMP); 2802 return (0); 2803 } 2804 } 2805 2806 /* 2807 * Check for degenerate cases of nothing useful read. 2808 * If so go try again 2809 */ 2810 cpos = rbuf; 2811 cend = rbuf + siz; 2812 dp = (struct dirent *)cpos; 2813 cookiep = cookies; 2814 2815 while (cpos < cend && ncookies > 0 && 2816 (dp->d_fileno == 0 || dp->d_type == DT_WHT)) { 2817 cpos += dp->d_reclen; 2818 dp = (struct dirent *)cpos; 2819 cookiep++; 2820 ncookies--; 2821 } 2822 if (cpos >= cend || ncookies == 0) { 2823 toff = off; 2824 siz = fullsiz; 2825 free(cookies, M_TEMP); 2826 cookies = NULL; 2827 goto again; 2828 } 2829 2830 len = 3 * NFSX_UNSIGNED; /* paranoia, probably can be 0 */ 2831 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_COOKIEVERF(v3) + siz); 2832 if (v3) { 2833 nfsm_srvpostop_attr(getret, &at); 2834 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2835 txdr_hyper(at.va_filerev, tl); 2836 } 2837 mp = mp2 = mb; 2838 bp = bpos; 2839 be = bp + M_TRAILINGSPACE(mp); 2840 2841 /* Loop through the records and build reply */ 2842 while (cpos < cend && ncookies > 0) { 2843 if (dp->d_fileno != 0 && dp->d_type != DT_WHT) { 2844 nlen = dp->d_namlen; 2845 rem = nfsm_rndup(nlen)-nlen; 2846 len += (4 * NFSX_UNSIGNED + nlen + rem); 2847 if (v3) 2848 len += 2 * NFSX_UNSIGNED; 2849 if (len > cnt) { 2850 eofflag = 0; 2851 break; 2852 } 2853 /* 2854 * Build the directory record xdr from 2855 * the dirent entry. 2856 */ 2857 nfsm_clget; 2858 *tl = nfs_true; 2859 bp += NFSX_UNSIGNED; 2860 if (v3) { 2861 nfsm_clget; 2862 *tl = txdr_unsigned(dp->d_fileno >> 32); 2863 bp += NFSX_UNSIGNED; 2864 } 2865 nfsm_clget; 2866 *tl = txdr_unsigned(dp->d_fileno); 2867 bp += NFSX_UNSIGNED; 2868 nfsm_clget; 2869 *tl = txdr_unsigned(nlen); 2870 bp += NFSX_UNSIGNED; 2871 2872 /* And loop around copying the name */ 2873 xfer = nlen; 2874 cp = dp->d_name; 2875 while (xfer > 0) { 2876 nfsm_clget; 2877 if ((bp+xfer) > be) 2878 tsiz = be-bp; 2879 else 2880 tsiz = xfer; 2881 memcpy(bp, cp, tsiz); 2882 bp += tsiz; 2883 xfer -= tsiz; 2884 if (xfer > 0) 2885 cp += tsiz; 2886 } 2887 /* And null pad to an int32_t boundary */ 2888 for (i = 0; i < rem; i++) 2889 *bp++ = '\0'; 2890 nfsm_clget; 2891 2892 /* Finish off the record */ 2893 txdr_hyper(*cookiep, &jar); 2894 if (v3) { 2895 *tl = jar.nfsuquad[0]; 2896 bp += NFSX_UNSIGNED; 2897 nfsm_clget; 2898 } 2899 *tl = jar.nfsuquad[1]; 2900 bp += NFSX_UNSIGNED; 2901 } 2902 cpos += dp->d_reclen; 2903 dp = (struct dirent *)cpos; 2904 cookiep++; 2905 ncookies--; 2906 } 2907 vrele(vp); 2908 nfsm_clget; 2909 *tl = nfs_false; 2910 bp += NFSX_UNSIGNED; 2911 nfsm_clget; 2912 if (eofflag) 2913 *tl = nfs_true; 2914 else 2915 *tl = nfs_false; 2916 bp += NFSX_UNSIGNED; 2917 if (mp != mb) { 2918 if (bp < be) 2919 mp->m_len = bp - mtod(mp, char *); 2920 } else 2921 mp->m_len += bp - bpos; 2922 free((void *)rbuf, M_TEMP); 2923 free((void *)cookies, M_TEMP); 2924 nfsm_srvdone; 2925 } 2926 2927 int 2928 nfsrv_readdirplus(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 2929 { 2930 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2931 struct mbuf *nam = nfsd->nd_nam; 2932 char *dpos = nfsd->nd_dpos; 2933 kauth_cred_t cred = nfsd->nd_cr; 2934 char *bp, *be; 2935 struct mbuf *mp; 2936 struct dirent *dp; 2937 char *cp; 2938 u_int32_t *tl; 2939 int32_t t1; 2940 char *bpos; 2941 struct mbuf *mb, *mreq __unused, *mp2; 2942 char *cpos, *cend, *cp2, *rbuf; 2943 struct vnode *vp, *nvp; 2944 struct flrep fl; 2945 nfsrvfh_t nsfh; 2946 struct uio io; 2947 struct iovec iv; 2948 struct vattr va, at, *vap = &va; 2949 struct nfs_fattr *fp; 2950 int len, nlen, rem, xfer, tsiz, i, error = 0, getret = 1; 2951 int siz, cnt, fullsiz, eofflag, rdonly, cache = 0, dirlen, ncookies; 2952 u_quad_t frev, off, toff; 2953 #ifdef NFS3_STRICTVERF 2954 u_quad_t verf; 2955 #endif 2956 off_t *cookies = NULL, *cookiep; 2957 2958 nfsm_srvmtofh(&nsfh); 2959 nfsm_dissect(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 2960 toff = fxdr_hyper(tl); 2961 tl += 2; 2962 #ifdef NFS3_STRICTVERF 2963 verf = fxdr_hyper(tl); 2964 #endif 2965 tl += 2; 2966 siz = fxdr_unsigned(int, *tl++); 2967 cnt = fxdr_unsigned(int, *tl); 2968 off = toff; 2969 siz = ((siz + NFS_SRVDIRBLKSIZ - 1) & ~(NFS_SRVDIRBLKSIZ - 1)); 2970 xfer = NFS_SRVMAXDATA(nfsd); 2971 if (siz > xfer) 2972 siz = xfer; 2973 fullsiz = siz; 2974 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 2975 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 2976 if (!error && vp->v_type != VDIR) { 2977 error = ENOTDIR; 2978 vput(vp); 2979 } 2980 if (error) { 2981 nfsm_reply(NFSX_UNSIGNED); 2982 nfsm_srvpostop_attr(getret, &at); 2983 return (0); 2984 } 2985 error = getret = VOP_GETATTR(vp, &at, cred); 2986 #ifdef NFS3_STRICTVERF 2987 /* 2988 * XXX This check is too strict for Solaris 2.5 clients. 2989 */ 2990 if (!error && toff && verf != at.va_filerev) 2991 error = NFSERR_BAD_COOKIE; 2992 #endif 2993 if (!error) { 2994 nqsrv_getl(vp, ND_READ); 2995 error = nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 0); 2996 } 2997 if (error) { 2998 vput(vp); 2999 nfsm_reply(NFSX_V3POSTOPATTR); 3000 nfsm_srvpostop_attr(getret, &at); 3001 return (0); 3002 } 3003 VOP_UNLOCK(vp); 3004 3005 rbuf = malloc(siz, M_TEMP, M_WAITOK); 3006 again: 3007 iv.iov_base = rbuf; 3008 iv.iov_len = fullsiz; 3009 io.uio_iov = &iv; 3010 io.uio_iovcnt = 1; 3011 io.uio_offset = (off_t)off; 3012 io.uio_resid = fullsiz; 3013 io.uio_rw = UIO_READ; 3014 UIO_SETUP_SYSSPACE(&io); 3015 eofflag = 0; 3016 3017 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 3018 3019 error = VOP_READDIR(vp, &io, cred, &eofflag, &cookies, &ncookies); 3020 3021 off = (u_quad_t)io.uio_offset; 3022 getret = VOP_GETATTR(vp, &at, cred); 3023 3024 VOP_UNLOCK(vp); 3025 3026 /* 3027 * If the VGET operation doesn't work for this filesystem, 3028 * we can't support readdirplus. Returning NOTSUPP should 3029 * make clients fall back to plain readdir. 3030 * There's no need to check for VPTOFH as well, we wouldn't 3031 * even be here otherwise. 3032 */ 3033 if (!getret) { 3034 if ((getret = VFS_VGET(vp->v_mount, at.va_fileid, &nvp))) 3035 getret = (getret == EOPNOTSUPP) ? 3036 NFSERR_NOTSUPP : NFSERR_IO; 3037 else 3038 vput(nvp); 3039 } 3040 3041 if (!cookies && !error) 3042 error = NFSERR_PERM; 3043 if (!error) 3044 error = getret; 3045 if (error) { 3046 vrele(vp); 3047 if (cookies) 3048 free((void *)cookies, M_TEMP); 3049 free((void *)rbuf, M_TEMP); 3050 nfsm_reply(NFSX_V3POSTOPATTR); 3051 nfsm_srvpostop_attr(getret, &at); 3052 return (0); 3053 } 3054 if (io.uio_resid) { 3055 siz -= io.uio_resid; 3056 3057 /* 3058 * If nothing read, return eof 3059 * rpc reply 3060 */ 3061 if (siz == 0) { 3062 vrele(vp); 3063 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF + 3064 2 * NFSX_UNSIGNED); 3065 nfsm_srvpostop_attr(getret, &at); 3066 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 3067 txdr_hyper(at.va_filerev, tl); 3068 tl += 2; 3069 *tl++ = nfs_false; 3070 *tl = nfs_true; 3071 free((void *)cookies, M_TEMP); 3072 free((void *)rbuf, M_TEMP); 3073 return (0); 3074 } 3075 } 3076 3077 /* 3078 * Check for degenerate cases of nothing useful read. 3079 * If so go try again 3080 */ 3081 cpos = rbuf; 3082 cend = rbuf + siz; 3083 dp = (struct dirent *)cpos; 3084 cookiep = cookies; 3085 3086 while (cpos < cend && ncookies > 0 && 3087 (dp->d_fileno == 0 || dp->d_type == DT_WHT)) { 3088 cpos += dp->d_reclen; 3089 dp = (struct dirent *)cpos; 3090 cookiep++; 3091 ncookies--; 3092 } 3093 if (cpos >= cend || ncookies == 0) { 3094 toff = off; 3095 siz = fullsiz; 3096 free(cookies, M_TEMP); 3097 cookies = NULL; 3098 goto again; 3099 } 3100 3101 dirlen = len = NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF + 2 * NFSX_UNSIGNED; 3102 nfsm_reply(cnt); 3103 nfsm_srvpostop_attr(getret, &at); 3104 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 3105 txdr_hyper(at.va_filerev, tl); 3106 mp = mp2 = mb; 3107 bp = bpos; 3108 be = bp + M_TRAILINGSPACE(mp); 3109 3110 /* Loop through the records and build reply */ 3111 while (cpos < cend && ncookies > 0) { 3112 if (dp->d_fileno != 0 && dp->d_type != DT_WHT) { 3113 nfsrvfh_t nnsfh; 3114 3115 nlen = dp->d_namlen; 3116 rem = nfsm_rndup(nlen)-nlen; 3117 3118 /* 3119 * For readdir_and_lookup get the vnode using 3120 * the file number. 3121 */ 3122 if (VFS_VGET(vp->v_mount, dp->d_fileno, &nvp)) 3123 goto invalid; 3124 if (nfsrv_composefh(nvp, &nnsfh, true)) { 3125 vput(nvp); 3126 goto invalid; 3127 } 3128 if (VOP_GETATTR(nvp, vap, cred)) { 3129 vput(nvp); 3130 goto invalid; 3131 } 3132 vput(nvp); 3133 3134 /* 3135 * If either the dircount or maxcount will be 3136 * exceeded, get out now. Both of these lengths 3137 * are calculated conservatively, including all 3138 * XDR overheads. 3139 */ 3140 len += (8 * NFSX_UNSIGNED + nlen + rem + NFSX_V3FH + 3141 NFSX_V3POSTOPATTR); 3142 dirlen += (6 * NFSX_UNSIGNED + nlen + rem); 3143 if (len > cnt || dirlen > fullsiz) { 3144 eofflag = 0; 3145 break; 3146 } 3147 3148 /* 3149 * Build the directory record xdr from 3150 * the dirent entry. 3151 */ 3152 fp = (struct nfs_fattr *)&fl.fl_fattr; 3153 nfsm_srvfillattr(vap, fp); 3154 fl.fl_fhsize = txdr_unsigned(NFSX_V3FH); 3155 fl.fl_fhok = nfs_true; 3156 fl.fl_postopok = nfs_true; 3157 txdr_hyper(*cookiep, fl.fl_off.nfsuquad); 3158 3159 nfsm_clget; 3160 *tl = nfs_true; 3161 bp += NFSX_UNSIGNED; 3162 nfsm_clget; 3163 *tl = txdr_unsigned(dp->d_fileno >> 32); 3164 bp += NFSX_UNSIGNED; 3165 nfsm_clget; 3166 *tl = txdr_unsigned(dp->d_fileno); 3167 bp += NFSX_UNSIGNED; 3168 nfsm_clget; 3169 *tl = txdr_unsigned(nlen); 3170 bp += NFSX_UNSIGNED; 3171 3172 /* And loop around copying the name */ 3173 xfer = nlen; 3174 cp = dp->d_name; 3175 while (xfer > 0) { 3176 nfsm_clget; 3177 if ((bp + xfer) > be) 3178 tsiz = be - bp; 3179 else 3180 tsiz = xfer; 3181 memcpy(bp, cp, tsiz); 3182 bp += tsiz; 3183 xfer -= tsiz; 3184 if (xfer > 0) 3185 cp += tsiz; 3186 } 3187 /* And null pad to an int32_t boundary */ 3188 for (i = 0; i < rem; i++) 3189 *bp++ = '\0'; 3190 3191 /* 3192 * Now copy the flrep structure out. 3193 */ 3194 xfer = sizeof(struct flrep); 3195 cp = (void *)&fl; 3196 while (xfer > 0) { 3197 nfsm_clget; 3198 if ((bp + xfer) > be) 3199 tsiz = be - bp; 3200 else 3201 tsiz = xfer; 3202 memcpy(bp, cp, tsiz); 3203 bp += tsiz; 3204 xfer -= tsiz; 3205 if (xfer > 0) 3206 cp += tsiz; 3207 } 3208 3209 /* 3210 * ... and filehandle. 3211 */ 3212 xfer = NFSRVFH_SIZE(&nnsfh); 3213 cp = NFSRVFH_DATA(&nnsfh); 3214 while (xfer > 0) { 3215 nfsm_clget; 3216 if ((bp + xfer) > be) 3217 tsiz = be - bp; 3218 else 3219 tsiz = xfer; 3220 memcpy(bp, cp, tsiz); 3221 bp += tsiz; 3222 xfer -= tsiz; 3223 if (xfer > 0) 3224 cp += tsiz; 3225 } 3226 } 3227 invalid: 3228 cpos += dp->d_reclen; 3229 dp = (struct dirent *)cpos; 3230 cookiep++; 3231 ncookies--; 3232 } 3233 vrele(vp); 3234 nfsm_clget; 3235 *tl = nfs_false; 3236 bp += NFSX_UNSIGNED; 3237 nfsm_clget; 3238 if (eofflag) 3239 *tl = nfs_true; 3240 else 3241 *tl = nfs_false; 3242 bp += NFSX_UNSIGNED; 3243 if (mp != mb) { 3244 if (bp < be) 3245 mp->m_len = bp - mtod(mp, char *); 3246 } else 3247 mp->m_len += bp - bpos; 3248 free((void *)cookies, M_TEMP); 3249 free((void *)rbuf, M_TEMP); 3250 nfsm_srvdone; 3251 } 3252 3253 /* 3254 * nfs commit service 3255 */ 3256 int 3257 nfsrv_commit(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 3258 { 3259 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3260 struct mbuf *nam = nfsd->nd_nam; 3261 char *dpos = nfsd->nd_dpos; 3262 kauth_cred_t cred = nfsd->nd_cr; 3263 struct vattr bfor, aft; 3264 struct vnode *vp; 3265 nfsrvfh_t nsfh; 3266 u_int32_t *tl; 3267 int32_t t1; 3268 char *bpos; 3269 int error = 0, rdonly, for_ret = 1, aft_ret = 1, cache = 0; 3270 uint32_t cnt; 3271 char *cp2; 3272 struct mbuf *mb, *mreq __unused; 3273 u_quad_t frev, off, end; 3274 3275 nfsm_srvmtofh(&nsfh); 3276 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 3277 3278 off = fxdr_hyper(tl); 3279 tl += 2; 3280 cnt = fxdr_unsigned(uint32_t, *tl); 3281 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 3282 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 3283 if (error) { 3284 nfsm_reply(2 * NFSX_UNSIGNED); 3285 nfsm_srvwcc_data(for_ret, &bfor, aft_ret, &aft); 3286 return (0); 3287 } 3288 for_ret = VOP_GETATTR(vp, &bfor, cred); 3289 end = (cnt > 0) ? off + cnt : vp->v_size; 3290 if (end < off || end > vp->v_size) 3291 end = vp->v_size; 3292 if (off < vp->v_size) 3293 error = VOP_FSYNC(vp, cred, FSYNC_WAIT, off, end); 3294 /* else error == 0, from nfsrv_fhtovp() */ 3295 aft_ret = VOP_GETATTR(vp, &aft, cred); 3296 vput(vp); 3297 nfsm_reply(NFSX_V3WCCDATA + NFSX_V3WRITEVERF); 3298 nfsm_srvwcc_data(for_ret, &bfor, aft_ret, &aft); 3299 if (!error) { 3300 nfsm_build(tl, u_int32_t *, NFSX_V3WRITEVERF); 3301 *tl++ = txdr_unsigned(boottime.tv_sec); 3302 *tl = txdr_unsigned(boottime.tv_nsec / 1000); 3303 } else { 3304 return (0); 3305 } 3306 nfsm_srvdone; 3307 } 3308 3309 /* 3310 * nfs statfs service 3311 */ 3312 int 3313 nfsrv_statfs(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 3314 { 3315 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3316 struct mbuf *nam = nfsd->nd_nam; 3317 char *dpos = nfsd->nd_dpos; 3318 kauth_cred_t cred = nfsd->nd_cr; 3319 struct statvfs *sf = NULL; 3320 struct nfs_statfs *sfp; 3321 u_int32_t *tl; 3322 int32_t t1; 3323 char *bpos; 3324 int error = 0, rdonly, cache = 0, getret = 1; 3325 int v3 = (nfsd->nd_flag & ND_NFSV3); 3326 char *cp2; 3327 struct mbuf *mb, *mreq __unused; 3328 struct vnode *vp; 3329 struct vattr at; 3330 nfsrvfh_t nsfh; 3331 u_quad_t frev, tval; 3332 3333 nfsm_srvmtofh(&nsfh); 3334 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 3335 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 3336 if (error) { 3337 nfsm_reply(NFSX_UNSIGNED); 3338 nfsm_srvpostop_attr(getret, &at); 3339 return (0); 3340 } 3341 sf = malloc(sizeof(*sf), M_TEMP, M_WAITOK); 3342 error = VFS_STATVFS(vp->v_mount, sf); 3343 getret = VOP_GETATTR(vp, &at, cred); 3344 vput(vp); 3345 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_STATFS(v3)); 3346 if (v3) 3347 nfsm_srvpostop_attr(getret, &at); 3348 if (error) { 3349 free(sf, M_TEMP); 3350 return (0); 3351 } 3352 nfsm_build(sfp, struct nfs_statfs *, NFSX_STATFS(v3)); 3353 if (v3) { 3354 tval = (u_quad_t)((quad_t)sf->f_blocks * (quad_t)sf->f_frsize); 3355 txdr_hyper(tval, &sfp->sf_tbytes); 3356 tval = (u_quad_t)((quad_t)sf->f_bfree * (quad_t)sf->f_frsize); 3357 txdr_hyper(tval, &sfp->sf_fbytes); 3358 tval = (u_quad_t)((quad_t)sf->f_bavail * (quad_t)sf->f_frsize); 3359 txdr_hyper(tval, &sfp->sf_abytes); 3360 tval = (u_quad_t)sf->f_files; 3361 txdr_hyper(tval, &sfp->sf_tfiles); 3362 tval = (u_quad_t)sf->f_ffree; 3363 txdr_hyper(tval, &sfp->sf_ffiles); 3364 txdr_hyper(tval, &sfp->sf_afiles); 3365 sfp->sf_invarsec = 0; 3366 } else { 3367 sfp->sf_tsize = txdr_unsigned(NFS_MAXDGRAMDATA); 3368 sfp->sf_bsize = txdr_unsigned(sf->f_frsize); 3369 sfp->sf_blocks = txdr_unsigned(sf->f_blocks); 3370 sfp->sf_bfree = txdr_unsigned(sf->f_bfree); 3371 sfp->sf_bavail = txdr_unsigned(sf->f_bavail); 3372 } 3373 nfsmout: 3374 if (sf) 3375 free(sf, M_TEMP); 3376 return error; 3377 } 3378 3379 /* 3380 * nfs fsinfo service 3381 */ 3382 int 3383 nfsrv_fsinfo(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 3384 { 3385 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3386 struct mbuf *nam = nfsd->nd_nam; 3387 char *dpos = nfsd->nd_dpos; 3388 kauth_cred_t cred = nfsd->nd_cr; 3389 u_int32_t *tl; 3390 struct nfsv3_fsinfo *sip; 3391 int32_t t1; 3392 char *bpos; 3393 int error = 0, rdonly, cache = 0, getret = 1; 3394 uint32_t maxdata; 3395 char *cp2; 3396 struct mbuf *mb, *mreq __unused; 3397 struct vnode *vp; 3398 struct vattr at; 3399 nfsrvfh_t nsfh; 3400 u_quad_t frev, maxfsize; 3401 struct statvfs *sb; 3402 3403 nfsm_srvmtofh(&nsfh); 3404 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 3405 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 3406 if (error) { 3407 nfsm_reply(NFSX_UNSIGNED); 3408 nfsm_srvpostop_attr(getret, &at); 3409 return (0); 3410 } 3411 3412 /* XXX Try to make a guess on the max file size. */ 3413 sb = malloc(sizeof(*sb), M_TEMP, M_WAITOK); 3414 VFS_STATVFS(vp->v_mount, sb); 3415 maxfsize = (u_quad_t)0x80000000 * sb->f_frsize - 1; 3416 free(sb, M_TEMP); 3417 3418 getret = VOP_GETATTR(vp, &at, cred); 3419 vput(vp); 3420 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3FSINFO); 3421 nfsm_srvpostop_attr(getret, &at); 3422 nfsm_build(sip, struct nfsv3_fsinfo *, NFSX_V3FSINFO); 3423 3424 /* 3425 * XXX 3426 * There should be file system VFS OP(s) to get this information. 3427 * For now, assume ufs. 3428 */ 3429 if (slp->ns_so->so_type == SOCK_DGRAM) 3430 maxdata = NFS_MAXDGRAMDATA; 3431 else 3432 maxdata = NFS_MAXDATA; 3433 sip->fs_rtmax = txdr_unsigned(maxdata); 3434 sip->fs_rtpref = txdr_unsigned(maxdata); 3435 sip->fs_rtmult = txdr_unsigned(NFS_FABLKSIZE); 3436 sip->fs_wtmax = txdr_unsigned(maxdata); 3437 sip->fs_wtpref = txdr_unsigned(maxdata); 3438 sip->fs_wtmult = txdr_unsigned(NFS_FABLKSIZE); 3439 sip->fs_dtpref = txdr_unsigned(maxdata); 3440 txdr_hyper(maxfsize, &sip->fs_maxfilesize); 3441 sip->fs_timedelta.nfsv3_sec = 0; 3442 sip->fs_timedelta.nfsv3_nsec = txdr_unsigned(1); 3443 sip->fs_properties = txdr_unsigned(NFSV3FSINFO_LINK | 3444 NFSV3FSINFO_SYMLINK | NFSV3FSINFO_HOMOGENEOUS | 3445 NFSV3FSINFO_CANSETTIME); 3446 nfsm_srvdone; 3447 } 3448 3449 /* 3450 * nfs pathconf service 3451 */ 3452 int 3453 nfsrv_pathconf(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 3454 { 3455 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3456 struct mbuf *nam = nfsd->nd_nam; 3457 char *dpos = nfsd->nd_dpos; 3458 kauth_cred_t cred = nfsd->nd_cr; 3459 u_int32_t *tl; 3460 struct nfsv3_pathconf *pc; 3461 int32_t t1; 3462 char *bpos; 3463 int error = 0, rdonly, cache = 0, getret = 1; 3464 register_t linkmax, namemax, chownres, notrunc; 3465 char *cp2; 3466 struct mbuf *mb, *mreq __unused; 3467 struct vnode *vp; 3468 struct vattr at; 3469 nfsrvfh_t nsfh; 3470 u_quad_t frev; 3471 3472 nfsm_srvmtofh(&nsfh); 3473 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 3474 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 3475 if (error) { 3476 nfsm_reply(NFSX_UNSIGNED); 3477 nfsm_srvpostop_attr(getret, &at); 3478 return (0); 3479 } 3480 error = VOP_PATHCONF(vp, _PC_LINK_MAX, &linkmax); 3481 if (!error) 3482 error = VOP_PATHCONF(vp, _PC_NAME_MAX, &namemax); 3483 if (!error) 3484 error = VOP_PATHCONF(vp, _PC_CHOWN_RESTRICTED, &chownres); 3485 if (!error) 3486 error = VOP_PATHCONF(vp, _PC_NO_TRUNC, ¬runc); 3487 getret = VOP_GETATTR(vp, &at, cred); 3488 vput(vp); 3489 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3PATHCONF); 3490 nfsm_srvpostop_attr(getret, &at); 3491 if (error) 3492 return (0); 3493 nfsm_build(pc, struct nfsv3_pathconf *, NFSX_V3PATHCONF); 3494 3495 pc->pc_linkmax = txdr_unsigned(linkmax); 3496 pc->pc_namemax = txdr_unsigned(namemax); 3497 pc->pc_notrunc = txdr_unsigned(notrunc); 3498 pc->pc_chownrestricted = txdr_unsigned(chownres); 3499 3500 /* 3501 * These should probably be supported by VOP_PATHCONF(), but 3502 * until msdosfs is exportable (why would you want to?), the 3503 * Unix defaults should be ok. 3504 */ 3505 pc->pc_caseinsensitive = nfs_false; 3506 pc->pc_casepreserving = nfs_true; 3507 nfsm_srvdone; 3508 } 3509 3510 /* 3511 * Null operation, used by clients to ping server 3512 */ 3513 /* ARGSUSED */ 3514 int 3515 nfsrv_null(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, 3516 struct lwp *lwp, struct mbuf **mrq) 3517 { 3518 struct mbuf *mrep = nfsd->nd_mrep; 3519 char *bpos; 3520 int error = NFSERR_RETVOID, cache = 0; 3521 struct mbuf *mb, *mreq __unused; 3522 u_quad_t frev; 3523 3524 nfsm_reply(0); 3525 nfsmout: 3526 return (0); 3527 } 3528 3529 /* 3530 * No operation, used for obsolete procedures 3531 */ 3532 /* ARGSUSED */ 3533 int 3534 nfsrv_noop(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, 3535 struct lwp *lwp, struct mbuf **mrq) 3536 { 3537 struct mbuf *mrep = nfsd->nd_mrep; 3538 char *bpos; 3539 int error, cache = 0; 3540 struct mbuf *mb, *mreq __unused; 3541 u_quad_t frev; 3542 3543 if (nfsd->nd_repstat) 3544 error = nfsd->nd_repstat; 3545 else 3546 error = EPROCUNAVAIL; 3547 nfsm_reply(0); 3548 nfsmout: 3549 return (0); 3550 } 3551 3552 /* 3553 * Perform access checking for vnodes obtained from file handles that would 3554 * refer to files already opened by a Unix client. You cannot just use 3555 * vn_writechk() and VOP_ACCESS() for two reasons. 3556 * 1 - You must check for exported rdonly as well as MNT_RDONLY for the write case 3557 * 2 - The owner is to be given access irrespective of mode bits for some 3558 * operations, so that processes that chmod after opening a file don't 3559 * break. I don't like this because it opens a security hole, but since 3560 * the nfs server opens a security hole the size of a barn door anyhow, 3561 * what the heck. 3562 * 3563 * The exception to rule 2 is EPERM. If a file is IMMUTABLE, VOP_ACCESS() 3564 * will return EPERM instead of EACCES. EPERM is always an error. 3565 */ 3566 int 3567 nfsrv_access(struct vnode *vp, int flags, kauth_cred_t cred, int rdonly, struct lwp *lwp, int override) 3568 { 3569 struct vattr vattr; 3570 int error; 3571 if (flags & VWRITE) { 3572 /* Just vn_writechk() changed to check rdonly */ 3573 /* 3574 * Disallow write attempts on read-only file systems; 3575 * unless the file is a socket or a block or character 3576 * device resident on the file system. 3577 */ 3578 if (rdonly || (vp->v_mount->mnt_flag & MNT_RDONLY)) { 3579 switch (vp->v_type) { 3580 case VREG: 3581 case VDIR: 3582 case VLNK: 3583 return (EROFS); 3584 default: 3585 break; 3586 } 3587 } 3588 3589 /* 3590 * If the vnode is in use as a process's text, 3591 * we can't allow writing. 3592 */ 3593 if (vp->v_iflag & VI_TEXT) 3594 return (ETXTBSY); 3595 } 3596 error = VOP_GETATTR(vp, &vattr, cred); 3597 if (error) 3598 return (error); 3599 error = VOP_ACCESS(vp, flags, cred); 3600 /* 3601 * Allow certain operations for the owner (reads and writes 3602 * on files that are already open). 3603 */ 3604 if (override && error == EACCES && kauth_cred_geteuid(cred) == vattr.va_uid) 3605 error = 0; 3606 return error; 3607 } 3608
Indexes created Tue Sep 23 07:09:52 GMT 2025