nfs_serv.c revision 1.167
1 /* $NetBSD: nfs_serv.c,v 1.167 2013/12/14 16:19:28 christos Exp $ */ 2 3 /* 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Rick Macklem at The University of Guelph. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)nfs_serv.c 8.8 (Berkeley) 7/31/95 35 */ 36 37 /* 38 * nfs version 2 and 3 server calls to vnode ops 39 * - these routines generally have 3 phases 40 * 1 - break down and validate rpc request in mbuf list 41 * 2 - do the vnode ops for the request 42 * (surprisingly ?? many are very similar to syscalls in vfs_syscalls.c) 43 * 3 - build the rpc reply in an mbuf list 44 * nb: 45 * - do not mix the phases, since the nfsm_?? macros can return failures 46 * on a bad rpc or similar and do not do any vrele() or vput()'s 47 * 48 * - the nfsm_reply() macro generates an nfs rpc reply with the nfs 49 * error number iff error != 0 whereas 50 * returning an error from the server function implies a fatal error 51 * such as a badly constructed rpc request that should be dropped without 52 * a reply. 53 * For Version 3, nfsm_reply() does not return for the error case, since 54 * most version 3 rpcs return more than the status for error cases. 55 */ 56 57 #include <sys/cdefs.h> 58 __KERNEL_RCSID(0, "$NetBSD: nfs_serv.c,v 1.167 2013/12/14 16:19:28 christos Exp $"); 59 60 #include <sys/param.h> 61 #include <sys/systm.h> 62 #include <sys/proc.h> 63 #include <sys/file.h> 64 #include <sys/namei.h> 65 #include <sys/vnode.h> 66 #include <sys/mount.h> 67 #include <sys/socket.h> 68 #include <sys/socketvar.h> 69 #include <sys/mbuf.h> 70 #include <sys/dirent.h> 71 #include <sys/stat.h> 72 #include <sys/kernel.h> 73 #include <sys/hash.h> 74 #include <sys/kauth.h> 75 #include <sys/module.h> 76 #include <sys/syscall.h> 77 #include <sys/syscallargs.h> 78 #include <sys/syscallvar.h> 79 80 #include <uvm/uvm.h> 81 82 #include <nfs/nfsproto.h> 83 #include <nfs/rpcv2.h> 84 #include <nfs/nfs.h> 85 #include <nfs/xdr_subs.h> 86 #include <nfs/nfsm_subs.h> 87 #include <nfs/nfs_var.h> 88 89 MODULE(MODULE_CLASS_MISC, nfsserver, "nfs"); 90 91 /* Global vars */ 92 extern u_int32_t nfs_xdrneg1; 93 extern u_int32_t nfs_false, nfs_true; 94 extern const enum vtype nv3tov_type[8]; 95 extern struct nfsstats nfsstats; 96 extern const nfstype nfsv2_type[9]; 97 extern const nfstype nfsv3_type[9]; 98 int nfsrvw_procrastinate = NFS_GATHERDELAY * 1000; 99 bool nfsd_use_loan = true; /* use page-loan for READ OP */ 100 101 #define nqsrv_getl(vp, rw) /* nothing */ 102 103 static const struct syscall_package nfsserver_syscalls[] = { 104 { SYS_nfssvc, 0, (sy_call_t *)sys_nfssvc }, 105 { 0, 0, NULL }, 106 }; 107 108 static int 109 nfsserver_modcmd(modcmd_t cmd, void *arg) 110 { 111 extern struct vfs_hooks nfs_export_hooks; /* XXX */ 112 int error; 113 114 switch (cmd) { 115 case MODULE_CMD_INIT: 116 error = syscall_establish(NULL, nfsserver_syscalls); 117 if (error != 0) { 118 return error; 119 } 120 nfs_init(); /* XXX for monolithic kernel */ 121 netexport_init(); 122 nfsrv_initcache(); /* Init the server request cache */ 123 nfsrv_init(0); /* Init server data structures */ 124 vfs_hooks_attach(&nfs_export_hooks); 125 nfs_timer_srvinit(nfsrv_timer); 126 return 0; 127 case MODULE_CMD_FINI: 128 if (netexport_hasexports()) 129 return EBUSY; 130 error = syscall_disestablish(NULL, nfsserver_syscalls); 131 if (error != 0) { 132 return error; 133 } 134 /* 135 * Kill export list before detaching VFS hooks, so we 136 * we don't leak state due to a concurrent umount(). 137 */ 138 netexport_fini(); 139 vfs_hooks_detach(&nfs_export_hooks); 140 141 /* Kill timer before server goes away. */ 142 nfs_timer_srvfini(); 143 nfsrv_fini(); 144 145 /* Server uses server cache, so kill cache last. */ 146 nfsrv_finicache(); 147 nfs_fini(); 148 return 0; 149 default: 150 return ENOTTY; 151 } 152 } 153 154 /* 155 * nfs v3 access service 156 */ 157 int 158 nfsrv3_access(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 159 { 160 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 161 struct mbuf *nam = nfsd->nd_nam; 162 char *dpos = nfsd->nd_dpos; 163 kauth_cred_t cred = nfsd->nd_cr; 164 struct vnode *vp; 165 nfsrvfh_t nsfh; 166 u_int32_t *tl; 167 int32_t t1; 168 char *bpos; 169 int error = 0, rdonly, cache = 0, getret; 170 char *cp2; 171 struct mbuf *mb, *mreq __unused; 172 struct vattr va; 173 u_long inmode, testmode, outmode; 174 u_quad_t frev; 175 176 nfsm_srvmtofh(&nsfh); 177 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 178 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, &rdonly, 179 (nfsd->nd_flag & ND_KERBAUTH), false); 180 if (error) { 181 nfsm_reply(NFSX_UNSIGNED); 182 nfsm_srvpostop_attr(1, (struct vattr *)0); 183 return (0); 184 } 185 inmode = fxdr_unsigned(u_int32_t, *tl); 186 outmode = 0; 187 if ((inmode & NFSV3ACCESS_READ) && 188 nfsrv_access(vp, VREAD, cred, rdonly, lwp, 0) == 0) 189 outmode |= NFSV3ACCESS_READ; 190 if (vp->v_type != VDIR) { 191 testmode = inmode & (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND); 192 if (testmode && 193 nfsrv_access(vp, VWRITE, cred, rdonly, lwp, 0) == 0) 194 outmode |= testmode; 195 if ((inmode & NFSV3ACCESS_EXECUTE) && 196 nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 0) == 0) 197 outmode |= NFSV3ACCESS_EXECUTE; 198 } else { 199 testmode = inmode & (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | 200 NFSV3ACCESS_DELETE); 201 if (testmode && 202 nfsrv_access(vp, VWRITE, cred, rdonly, lwp, 0) == 0) 203 outmode |= testmode; 204 if ((inmode & NFSV3ACCESS_LOOKUP) && 205 nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 0) == 0) 206 outmode |= NFSV3ACCESS_LOOKUP; 207 } 208 getret = VOP_GETATTR(vp, &va, cred); 209 vput(vp); 210 nfsm_reply(NFSX_POSTOPATTR(1) + NFSX_UNSIGNED); 211 nfsm_srvpostop_attr(getret, &va); 212 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 213 *tl = txdr_unsigned(outmode); 214 nfsm_srvdone; 215 } 216 217 /* 218 * nfs getattr service 219 */ 220 int 221 nfsrv_getattr(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 222 { 223 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 224 struct mbuf *nam = nfsd->nd_nam; 225 char *dpos = nfsd->nd_dpos; 226 kauth_cred_t cred = nfsd->nd_cr; 227 struct nfs_fattr *fp; 228 struct vattr va; 229 struct vnode *vp; 230 nfsrvfh_t nsfh; 231 u_int32_t *tl; 232 int32_t t1; 233 char *bpos; 234 int error = 0, rdonly, cache = 0; 235 char *cp2; 236 struct mbuf *mb, *mreq __unused; 237 u_quad_t frev; 238 239 nfsm_srvmtofh(&nsfh); 240 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, &rdonly, 241 (nfsd->nd_flag & ND_KERBAUTH), false); 242 if (error) { 243 nfsm_reply(0); 244 return (0); 245 } 246 nqsrv_getl(vp, ND_READ); 247 error = VOP_GETATTR(vp, &va, cred); 248 vput(vp); 249 nfsm_reply(NFSX_FATTR(nfsd->nd_flag & ND_NFSV3)); 250 if (error) 251 return (0); 252 nfsm_build(fp, struct nfs_fattr *, NFSX_FATTR(nfsd->nd_flag & ND_NFSV3)); 253 nfsm_srvfillattr(&va, fp); 254 nfsm_srvdone; 255 } 256 257 /* 258 * nfs setattr service 259 */ 260 int 261 nfsrv_setattr(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 262 { 263 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 264 struct mbuf *nam = nfsd->nd_nam; 265 char *dpos = nfsd->nd_dpos; 266 kauth_cred_t cred = nfsd->nd_cr; 267 struct vattr va, preat; 268 struct nfsv2_sattr *sp; 269 struct nfs_fattr *fp; 270 struct vnode *vp; 271 nfsrvfh_t nsfh; 272 u_int32_t *tl; 273 int32_t t1; 274 char *bpos; 275 int error = 0, rdonly, cache = 0, preat_ret = 1, postat_ret = 1; 276 int v3 = (nfsd->nd_flag & ND_NFSV3), gcheck = 0; 277 char *cp2; 278 struct mbuf *mb, *mreq __unused; 279 u_quad_t frev; 280 struct timespec guard; 281 282 memset(&guard, 0, sizeof guard); /* XXX gcc */ 283 284 nfsm_srvmtofh(&nsfh); 285 vattr_null(&va); 286 if (v3) { 287 nfsm_srvsattr(&va); 288 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 289 gcheck = fxdr_unsigned(int, *tl); 290 if (gcheck) { 291 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 292 fxdr_nfsv3time(tl, &guard); 293 } 294 } else { 295 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 296 /* 297 * Nah nah nah nah na nah 298 * There is a bug in the Sun client that puts 0xffff in the mode 299 * field of sattr when it should put in 0xffffffff. The u_short 300 * doesn't sign extend. 301 * --> check the low order 2 bytes for 0xffff 302 */ 303 if ((fxdr_unsigned(int, sp->sa_mode) & 0xffff) != 0xffff) 304 va.va_mode = nfstov_mode(sp->sa_mode); 305 if (sp->sa_uid != nfs_xdrneg1) 306 va.va_uid = fxdr_unsigned(uid_t, sp->sa_uid); 307 if (sp->sa_gid != nfs_xdrneg1) 308 va.va_gid = fxdr_unsigned(gid_t, sp->sa_gid); 309 if (sp->sa_size != nfs_xdrneg1) 310 va.va_size = fxdr_unsigned(u_quad_t, sp->sa_size); 311 if (sp->sa_atime.nfsv2_sec != nfs_xdrneg1) { 312 #ifdef notyet 313 fxdr_nfsv2time(&sp->sa_atime, &va.va_atime); 314 #else 315 va.va_atime.tv_sec = 316 fxdr_unsigned(u_int32_t,sp->sa_atime.nfsv2_sec); 317 va.va_atime.tv_nsec = 0; 318 #endif 319 } 320 if (sp->sa_mtime.nfsv2_sec != nfs_xdrneg1) 321 fxdr_nfsv2time(&sp->sa_mtime, &va.va_mtime); 322 323 } 324 325 /* 326 * Now that we have all the fields, lets do it. 327 */ 328 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, &rdonly, 329 (nfsd->nd_flag & ND_KERBAUTH), false); 330 if (error) { 331 nfsm_reply(2 * NFSX_UNSIGNED); 332 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 333 return (0); 334 } 335 nqsrv_getl(vp, ND_WRITE); 336 if (v3) { 337 error = preat_ret = VOP_GETATTR(vp, &preat, cred); 338 if (!error && gcheck && 339 (preat.va_ctime.tv_sec != guard.tv_sec || 340 preat.va_ctime.tv_nsec != guard.tv_nsec)) 341 error = NFSERR_NOT_SYNC; 342 if (error) { 343 vput(vp); 344 nfsm_reply(NFSX_WCCDATA(v3)); 345 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 346 return (0); 347 } 348 } 349 350 /* 351 * If the size is being changed write acces is required, otherwise 352 * just check for a read only file system. 353 */ 354 if (va.va_size == ((u_quad_t)((quad_t) -1))) { 355 if (rdonly || (vp->v_mount->mnt_flag & MNT_RDONLY)) { 356 error = EROFS; 357 goto out; 358 } 359 } else { 360 if (vp->v_type == VDIR) { 361 error = EISDIR; 362 goto out; 363 } else if ((error = nfsrv_access(vp, VWRITE, cred, rdonly, 364 lwp, 0)) != 0) 365 goto out; 366 } 367 error = VOP_SETATTR(vp, &va, cred); 368 postat_ret = VOP_GETATTR(vp, &va, cred); 369 if (!error) 370 error = postat_ret; 371 out: 372 vput(vp); 373 nfsm_reply(NFSX_WCCORFATTR(v3)); 374 if (v3) { 375 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 376 return (0); 377 } else { 378 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 379 nfsm_srvfillattr(&va, fp); 380 } 381 nfsm_srvdone; 382 } 383 384 /* 385 * nfs lookup rpc 386 */ 387 int 388 nfsrv_lookup(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 389 { 390 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 391 struct mbuf *nam = nfsd->nd_nam; 392 char *dpos = nfsd->nd_dpos; 393 kauth_cred_t cred = nfsd->nd_cr; 394 struct nfs_fattr *fp; 395 struct nameidata nd, ind, *ndp = &nd; 396 struct pathbuf *ipb = NULL; 397 struct vnode *vp, *dirp; 398 nfsrvfh_t nsfh; 399 char *cp; 400 u_int32_t *tl; 401 int32_t t1; 402 char *bpos; 403 int error = 0, cache = 0, dirattr_ret = 1; 404 uint32_t len; 405 int v3 = (nfsd->nd_flag & ND_NFSV3), pubflag; 406 char *cp2; 407 struct mbuf *mb, *mreq __unused; 408 struct vattr va, dirattr; 409 u_quad_t frev; 410 411 nfsm_srvmtofh(&nsfh); 412 nfsm_srvnamesiz(len); 413 414 pubflag = nfs_ispublicfh(&nsfh); 415 416 nd.ni_cnd.cn_cred = cred; 417 nd.ni_cnd.cn_nameiop = LOOKUP; 418 nd.ni_cnd.cn_flags = LOCKLEAF; 419 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 420 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), pubflag); 421 422 if (!error && pubflag) { 423 if (nd.ni_vp->v_type == VDIR && nfs_pub.np_index != NULL && 424 (ipb = pathbuf_create(nfs_pub.np_index)) != NULL) { 425 /* 426 * Setup call to lookup() to see if we can find 427 * the index file. Arguably, this doesn't belong 428 * in a kernel.. Ugh. 429 */ 430 ind = nd; 431 VOP_UNLOCK(nd.ni_vp); 432 ind.ni_pathbuf = ipb; 433 434 error = lookup_for_nfsd_index(&ind, nd.ni_vp); 435 if (!error) { 436 /* 437 * Found an index file. Get rid of 438 * the old references. 439 */ 440 if (dirp) 441 vrele(dirp); 442 dirp = nd.ni_vp; 443 ndp = &ind; 444 } else 445 error = 0; 446 } 447 /* 448 * If the public filehandle was used, check that this lookup 449 * didn't result in a filehandle outside the publicly exported 450 * filesystem. 451 */ 452 453 if (!error && ndp->ni_vp->v_mount != nfs_pub.np_mount) { 454 vput(nd.ni_vp); 455 error = EPERM; 456 } 457 } 458 459 if (error) { 460 if (nd.ni_pathbuf != NULL) { 461 pathbuf_destroy(nd.ni_pathbuf); 462 } 463 if (ipb != NULL) { 464 pathbuf_destroy(ipb); 465 } 466 if (dirp) { 467 if (v3) { 468 vn_lock(dirp, LK_SHARED | LK_RETRY); 469 dirattr_ret = VOP_GETATTR(dirp, &dirattr, cred); 470 vput(dirp); 471 } else 472 vrele(dirp); 473 } 474 nfsm_reply(NFSX_POSTOPATTR(v3)); 475 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 476 return (0); 477 } 478 479 nqsrv_getl(ndp->ni_startdir, ND_READ); 480 pathbuf_destroy(nd.ni_pathbuf); 481 if (ipb != NULL) { 482 pathbuf_destroy(ipb); 483 } 484 vp = ndp->ni_vp; 485 error = nfsrv_composefh(vp, &nsfh, v3); 486 if (!error) 487 error = VOP_GETATTR(vp, &va, cred); 488 vput(vp); 489 if (dirp) { 490 if (v3) { 491 vn_lock(dirp, LK_SHARED | LK_RETRY); 492 dirattr_ret = VOP_GETATTR(dirp, &dirattr, cred); 493 vput(dirp); 494 } else 495 vrele(dirp); 496 } 497 nfsm_reply(NFSX_SRVFH(&nsfh, v3) + NFSX_POSTOPORFATTR(v3) + 498 NFSX_POSTOPATTR(v3)); 499 if (error) { 500 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 501 return (0); 502 } 503 nfsm_srvfhtom(&nsfh, v3); 504 if (v3) { 505 nfsm_srvpostop_attr(0, &va); 506 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 507 } else { 508 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 509 nfsm_srvfillattr(&va, fp); 510 } 511 nfsm_srvdone; 512 } 513 514 /* 515 * nfs readlink service 516 */ 517 int 518 nfsrv_readlink(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 519 { 520 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 521 struct mbuf *nam = nfsd->nd_nam; 522 char *dpos = nfsd->nd_dpos; 523 kauth_cred_t cred = nfsd->nd_cr; 524 struct iovec iv[(NFS_MAXPATHLEN+MLEN-1)/MLEN]; 525 struct iovec *ivp = iv; 526 struct mbuf *mp; 527 u_int32_t *tl; 528 int32_t t1; 529 char *bpos; 530 int error = 0, rdonly, cache = 0, i, padlen, getret; 531 uint32_t len; 532 int v3 = (nfsd->nd_flag & ND_NFSV3); 533 char *cp2; 534 struct mbuf *mb, *mp2 = NULL, *mp3 = NULL, *mreq __unused; 535 struct vnode *vp; 536 struct vattr attr; 537 nfsrvfh_t nsfh; 538 struct uio io, *uiop = &io; 539 u_quad_t frev; 540 541 nfsm_srvmtofh(&nsfh); 542 len = 0; 543 i = 0; 544 while (len < NFS_MAXPATHLEN) { 545 mp = m_get(M_WAIT, MT_DATA); 546 MCLAIM(mp, &nfs_mowner); 547 m_clget(mp, M_WAIT); 548 mp->m_len = NFSMSIZ(mp); 549 if (len == 0) 550 mp3 = mp2 = mp; 551 else { 552 mp2->m_next = mp; 553 mp2 = mp; 554 } 555 if ((len+mp->m_len) > NFS_MAXPATHLEN) { 556 mp->m_len = NFS_MAXPATHLEN-len; 557 len = NFS_MAXPATHLEN; 558 } else 559 len += mp->m_len; 560 ivp->iov_base = mtod(mp, void *); 561 ivp->iov_len = mp->m_len; 562 i++; 563 ivp++; 564 } 565 uiop->uio_iov = iv; 566 uiop->uio_iovcnt = i; 567 uiop->uio_offset = 0; 568 uiop->uio_resid = len; 569 uiop->uio_rw = UIO_READ; 570 UIO_SETUP_SYSSPACE(uiop); 571 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 572 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 573 if (error) { 574 m_freem(mp3); 575 nfsm_reply(2 * NFSX_UNSIGNED); 576 nfsm_srvpostop_attr(1, (struct vattr *)0); 577 return (0); 578 } 579 if (vp->v_type != VLNK) { 580 if (v3) 581 error = EINVAL; 582 else 583 error = ENXIO; 584 goto out; 585 } 586 nqsrv_getl(vp, ND_READ); 587 error = VOP_READLINK(vp, uiop, cred); 588 out: 589 getret = VOP_GETATTR(vp, &attr, cred); 590 vput(vp); 591 if (error) 592 m_freem(mp3); 593 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_UNSIGNED); 594 if (v3) { 595 nfsm_srvpostop_attr(getret, &attr); 596 if (error) 597 return (0); 598 } 599 len -= uiop->uio_resid; 600 padlen = nfsm_padlen(len); 601 if (uiop->uio_resid || padlen) 602 nfs_zeropad(mp3, uiop->uio_resid, padlen); 603 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 604 *tl = txdr_unsigned(len); 605 mb->m_next = mp3; 606 nfsm_srvdone; 607 } 608 609 /* 610 * nfs read service 611 */ 612 int 613 nfsrv_read(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 614 { 615 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 616 struct mbuf *nam = nfsd->nd_nam; 617 char *dpos = nfsd->nd_dpos; 618 kauth_cred_t cred = nfsd->nd_cr; 619 struct mbuf *m; 620 struct nfs_fattr *fp; 621 u_int32_t *tl; 622 int32_t t1; 623 int i; 624 char *bpos; 625 int error = 0, rdonly, cache = 0, getret; 626 int v3 = (nfsd->nd_flag & ND_NFSV3); 627 uint32_t reqlen, len, cnt, left; 628 int padlen; 629 char *cp2; 630 struct mbuf *mb, *mreq; 631 struct vnode *vp; 632 nfsrvfh_t nsfh; 633 struct uio io, *uiop = &io; 634 struct vattr va; 635 off_t off; 636 u_quad_t frev; 637 638 nfsm_srvmtofh(&nsfh); 639 if (v3) { 640 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 641 off = fxdr_hyper(tl); 642 } else { 643 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 644 off = (off_t)fxdr_unsigned(u_int32_t, *tl); 645 } 646 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 647 reqlen = fxdr_unsigned(uint32_t, *tl); 648 reqlen = MIN(reqlen, NFS_SRVMAXDATA(nfsd)); 649 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 650 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 651 if (error) { 652 nfsm_reply(2 * NFSX_UNSIGNED); 653 nfsm_srvpostop_attr(1, (struct vattr *)0); 654 return (0); 655 } 656 if (vp->v_type != VREG) { 657 if (v3) 658 error = EINVAL; 659 else 660 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 661 } 662 if (!error) { 663 nqsrv_getl(vp, ND_READ); 664 if ((error = nfsrv_access(vp, VREAD, cred, rdonly, lwp, 1)) != 0) 665 error = nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 1); 666 } 667 getret = VOP_GETATTR(vp, &va, cred); 668 if (!error) 669 error = getret; 670 if (error) { 671 vput(vp); 672 nfsm_reply(NFSX_POSTOPATTR(v3)); 673 nfsm_srvpostop_attr(getret, &va); 674 return (0); 675 } 676 if (off >= va.va_size) 677 cnt = 0; 678 else if ((off + reqlen) > va.va_size) 679 cnt = va.va_size - off; 680 else 681 cnt = reqlen; 682 nfsm_reply(NFSX_POSTOPORFATTR(v3) + 3 * NFSX_UNSIGNED+nfsm_rndup(cnt)); 683 if (v3) { 684 nfsm_build(tl, u_int32_t *, NFSX_V3FATTR + 4 * NFSX_UNSIGNED); 685 *tl++ = nfs_true; 686 fp = (struct nfs_fattr *)tl; 687 tl += (NFSX_V3FATTR / sizeof (u_int32_t)); 688 } else { 689 nfsm_build(tl, u_int32_t *, NFSX_V2FATTR + NFSX_UNSIGNED); 690 fp = (struct nfs_fattr *)tl; 691 tl += (NFSX_V2FATTR / sizeof (u_int32_t)); 692 } 693 len = left = cnt; 694 if (cnt > 0) { 695 if (nfsd_use_loan) { 696 struct vm_page **pgpp; 697 voff_t pgoff = trunc_page(off); 698 int npages; 699 vaddr_t lva; 700 701 npages = (round_page(off + cnt) - pgoff) >> PAGE_SHIFT; 702 KASSERT(npages <= M_EXT_MAXPAGES); /* XXX */ 703 704 /* allocate kva for mbuf data */ 705 lva = sokvaalloc(pgoff, npages << PAGE_SHIFT, 706 slp->ns_so); 707 if (lva == 0) { 708 /* fall back to VOP_READ */ 709 goto loan_fail; 710 } 711 712 /* allocate mbuf */ 713 m = m_get(M_WAIT, MT_DATA); 714 MCLAIM(m, &nfs_mowner); 715 pgpp = m->m_ext.ext_pgs; 716 717 /* loan pages */ 718 error = uvm_loanuobjpages(&vp->v_uobj, pgoff, npages, 719 pgpp); 720 if (error) { 721 sokvafree(lva, npages << PAGE_SHIFT); 722 m_free(m); 723 if (error == EBUSY) 724 goto loan_fail; 725 goto read_error; 726 } 727 728 /* associate kva to mbuf */ 729 MEXTADD(m, (void *)(lva + ((vaddr_t)off & PAGE_MASK)), 730 cnt, M_MBUF, soloanfree, slp->ns_so); 731 m->m_flags |= M_EXT_PAGES | M_EXT_ROMAP; 732 m->m_len = cnt; 733 734 /* map pages */ 735 for (i = 0; i < npages; i++) { 736 pmap_kenter_pa(lva, VM_PAGE_TO_PHYS(pgpp[i]), 737 VM_PROT_READ, 0); 738 lva += PAGE_SIZE; 739 } 740 741 pmap_update(pmap_kernel()); 742 743 mb->m_next = m; 744 mb = m; 745 error = 0; 746 uiop->uio_resid = 0; 747 } else { 748 struct iovec *iv; 749 struct iovec *iv2; 750 struct mbuf *m2; 751 int siz; 752 loan_fail: 753 /* 754 * Generate the mbuf list with the uio_iov ref. to it. 755 */ 756 i = 0; 757 m = m2 = mb; 758 while (left > 0) { 759 siz = min(M_TRAILINGSPACE(m), left); 760 if (siz > 0) { 761 left -= siz; 762 i++; 763 } 764 if (left > 0) { 765 m = m_get(M_WAIT, MT_DATA); 766 MCLAIM(m, &nfs_mowner); 767 m_clget(m, M_WAIT); 768 m->m_len = 0; 769 m2->m_next = m; 770 m2 = m; 771 } 772 } 773 iv = malloc(i * sizeof(struct iovec), M_TEMP, M_WAITOK); 774 uiop->uio_iov = iv2 = iv; 775 m = mb; 776 left = cnt; 777 i = 0; 778 while (left > 0) { 779 if (m == NULL) 780 panic("nfsrv_read iov"); 781 siz = min(M_TRAILINGSPACE(m), left); 782 if (siz > 0) { 783 iv->iov_base = mtod(m, char *) + 784 m->m_len; 785 iv->iov_len = siz; 786 m->m_len += siz; 787 left -= siz; 788 iv++; 789 i++; 790 } 791 m = m->m_next; 792 } 793 uiop->uio_iovcnt = i; 794 uiop->uio_offset = off; 795 uiop->uio_resid = cnt; 796 uiop->uio_rw = UIO_READ; 797 UIO_SETUP_SYSSPACE(uiop); 798 error = VOP_READ(vp, uiop, IO_NODELOCKED, cred); 799 free((void *)iv2, M_TEMP); 800 } 801 read_error: 802 if (error || (getret = VOP_GETATTR(vp, &va, cred)) != 0){ 803 if (!error) 804 error = getret; 805 m_freem(mreq); 806 vput(vp); 807 nfsm_reply(NFSX_POSTOPATTR(v3)); 808 nfsm_srvpostop_attr(getret, &va); 809 return (0); 810 } 811 } else { 812 uiop->uio_resid = 0; 813 } 814 vput(vp); 815 nfsm_srvfillattr(&va, fp); 816 len -= uiop->uio_resid; 817 padlen = nfsm_padlen(len); 818 if (uiop->uio_resid || padlen) 819 nfs_zeropad(mb, uiop->uio_resid, padlen); 820 if (v3) { 821 /* count */ 822 *tl++ = txdr_unsigned(len); 823 /* eof */ 824 if (off + len >= va.va_size) 825 *tl++ = nfs_true; 826 else 827 *tl++ = nfs_false; 828 } 829 *tl = txdr_unsigned(len); 830 nfsm_srvdone; 831 } 832 833 /* 834 * nfs write service 835 */ 836 int 837 nfsrv_write(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 838 { 839 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 840 struct mbuf *nam = nfsd->nd_nam; 841 char *dpos = nfsd->nd_dpos; 842 kauth_cred_t cred = nfsd->nd_cr; 843 struct iovec *ivp; 844 int i, cnt; 845 struct mbuf *mp; 846 struct nfs_fattr *fp; 847 struct iovec *iv; 848 struct vattr va, forat; 849 u_int32_t *tl; 850 int32_t t1; 851 char *bpos; 852 int error = 0, rdonly, cache = 0, len, forat_ret = 1; 853 int ioflags, aftat_ret = 1, retlen, zeroing, adjust; 854 int stable = NFSV3WRITE_FILESYNC; 855 int v3 = (nfsd->nd_flag & ND_NFSV3); 856 char *cp2; 857 struct mbuf *mb, *mreq __unused; 858 struct vnode *vp; 859 nfsrvfh_t nsfh; 860 struct uio io, *uiop = &io; 861 off_t off; 862 u_quad_t frev; 863 864 if (mrep == NULL) { 865 *mrq = NULL; 866 return (0); 867 } 868 nfsm_srvmtofh(&nsfh); 869 if (v3) { 870 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 871 off = fxdr_hyper(tl); 872 tl += 3; 873 stable = fxdr_unsigned(int, *tl++); 874 } else { 875 nfsm_dissect(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 876 off = (off_t)fxdr_unsigned(u_int32_t, *++tl); 877 tl += 2; 878 } 879 retlen = len = fxdr_unsigned(int32_t, *tl); 880 cnt = i = 0; 881 882 /* 883 * For NFS Version 2, it is not obvious what a write of zero length 884 * should do, but I might as well be consistent with Version 3, 885 * which is to return ok so long as there are no permission problems. 886 */ 887 if (len > 0) { 888 zeroing = 1; 889 mp = mrep; 890 while (mp) { 891 if (mp == md) { 892 zeroing = 0; 893 adjust = dpos - mtod(mp, char *); 894 mp->m_len -= adjust; 895 if (mp->m_len > 0 && adjust > 0) 896 NFSMADV(mp, adjust); 897 } 898 if (zeroing) 899 mp->m_len = 0; 900 else if (mp->m_len > 0) { 901 i += mp->m_len; 902 if (i > len) { 903 mp->m_len -= (i - len); 904 zeroing = 1; 905 } 906 if (mp->m_len > 0) 907 cnt++; 908 } 909 mp = mp->m_next; 910 } 911 } 912 if (len > NFS_MAXDATA || len < 0 || i < len) { 913 error = EIO; 914 nfsm_reply(2 * NFSX_UNSIGNED); 915 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 916 return (0); 917 } 918 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 919 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 920 if (error) { 921 nfsm_reply(2 * NFSX_UNSIGNED); 922 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 923 return (0); 924 } 925 if (v3) 926 forat_ret = VOP_GETATTR(vp, &forat, cred); 927 if (vp->v_type != VREG) { 928 if (v3) 929 error = EINVAL; 930 else 931 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 932 } 933 if (!error) { 934 nqsrv_getl(vp, ND_WRITE); 935 error = nfsrv_access(vp, VWRITE, cred, rdonly, lwp, 1); 936 } 937 if (error) { 938 vput(vp); 939 nfsm_reply(NFSX_WCCDATA(v3)); 940 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 941 return (0); 942 } 943 944 if (len > 0) { 945 ivp = malloc(cnt * sizeof (struct iovec), M_TEMP, M_WAITOK); 946 uiop->uio_iov = iv = ivp; 947 uiop->uio_iovcnt = cnt; 948 mp = mrep; 949 while (mp) { 950 if (mp->m_len > 0) { 951 ivp->iov_base = mtod(mp, void *); 952 ivp->iov_len = mp->m_len; 953 ivp++; 954 } 955 mp = mp->m_next; 956 } 957 958 /* 959 * XXX 960 * The IO_METASYNC flag indicates that all metadata (and not 961 * just enough to ensure data integrity) must be written to 962 * stable storage synchronously. 963 * (IO_METASYNC is not yet implemented in 4.4BSD-Lite.) 964 */ 965 if (stable == NFSV3WRITE_UNSTABLE) 966 ioflags = IO_NODELOCKED; 967 else if (stable == NFSV3WRITE_DATASYNC) 968 ioflags = (IO_SYNC | IO_NODELOCKED); 969 else 970 ioflags = (IO_METASYNC | IO_SYNC | IO_NODELOCKED); 971 uiop->uio_resid = len; 972 uiop->uio_rw = UIO_WRITE; 973 uiop->uio_offset = off; 974 UIO_SETUP_SYSSPACE(uiop); 975 error = VOP_WRITE(vp, uiop, ioflags, cred); 976 nfsstats.srvvop_writes++; 977 free(iv, M_TEMP); 978 } 979 aftat_ret = VOP_GETATTR(vp, &va, cred); 980 vput(vp); 981 if (!error) 982 error = aftat_ret; 983 nfsm_reply(NFSX_PREOPATTR(v3) + NFSX_POSTOPORFATTR(v3) + 984 2 * NFSX_UNSIGNED + NFSX_WRITEVERF(v3)); 985 if (v3) { 986 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 987 if (error) 988 return (0); 989 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 990 *tl++ = txdr_unsigned(retlen); 991 if (stable == NFSV3WRITE_UNSTABLE) 992 *tl++ = txdr_unsigned(stable); 993 else 994 *tl++ = txdr_unsigned(NFSV3WRITE_FILESYNC); 995 /* 996 * Actually, there is no need to txdr these fields, 997 * but it may make the values more human readable, 998 * for debugging purposes. 999 */ 1000 *tl++ = txdr_unsigned(boottime.tv_sec); 1001 *tl = txdr_unsigned(boottime.tv_nsec / 1000); 1002 } else { 1003 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 1004 nfsm_srvfillattr(&va, fp); 1005 } 1006 nfsm_srvdone; 1007 } 1008 1009 /* 1010 * XXX elad: the original NFSW_SAMECRED() macro also made sure the 1011 * two nd_flag fields of the descriptors contained 1012 * ND_KERBAUTH. 1013 */ 1014 static int 1015 nfsrv_samecred(kauth_cred_t cred1, kauth_cred_t cred2) 1016 { 1017 int i, do_ngroups; 1018 1019 if (kauth_cred_geteuid(cred1) != kauth_cred_geteuid(cred2)) 1020 return (0); 1021 if (kauth_cred_ngroups(cred1) != kauth_cred_ngroups(cred2)) 1022 return (0); 1023 do_ngroups = kauth_cred_ngroups(cred1); 1024 for (i = 0; i < do_ngroups; i++) 1025 if (kauth_cred_group(cred1, i) != 1026 kauth_cred_group(cred2, i)) 1027 return (0); 1028 1029 return (1); 1030 } 1031 1032 static struct nfsrvw_delayhash * 1033 nfsrv_nwdelayhash(struct nfssvc_sock *slp, const nfsrvfh_t *nsfh) 1034 { 1035 uint32_t hash; 1036 1037 hash = hash32_buf(NFSRVFH_DATA(nsfh), NFSRVFH_SIZE(nsfh), 1038 HASH32_BUF_INIT); 1039 return &slp->ns_wdelayhashtbl[hash % NFS_WDELAYHASHSIZ]; 1040 } 1041 1042 /* 1043 * NFS write service with write gathering support. Called when 1044 * nfsrvw_procrastinate > 0. 1045 * See: Chet Juszczak, "Improving the Write Performance of an NFS Server", 1046 * in Proc. of the Winter 1994 Usenix Conference, pg. 247-259, San Franscisco, 1047 * Jan. 1994. 1048 */ 1049 int 1050 nfsrv_writegather(struct nfsrv_descript **ndp, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 1051 { 1052 struct timeval now; 1053 struct iovec *ivp; 1054 struct mbuf *mp; 1055 struct nfsrv_descript *wp, *nfsd, *owp, *swp; 1056 struct nfs_fattr *fp; 1057 int i = 0; 1058 struct iovec *iov; 1059 struct nfsrvw_delayhash *wpp; 1060 kauth_cred_t cred; 1061 struct vattr va, forat; 1062 u_int32_t *tl; 1063 int32_t t1; 1064 char *bpos, *dpos; 1065 int error = 0, rdonly, cache = 0, len = 0, forat_ret = 1; 1066 int ioflags, aftat_ret = 1, adjust, v3, zeroing; 1067 char *cp2; 1068 struct mbuf *mb, *mreq, *mrep, *md; 1069 struct vnode *vp; 1070 struct uio io, *uiop = &io; 1071 u_quad_t frev, cur_usec; 1072 1073 *mrq = NULL; 1074 if (*ndp) { 1075 nfsd = *ndp; 1076 *ndp = NULL; 1077 mrep = nfsd->nd_mrep; 1078 md = nfsd->nd_md; 1079 dpos = nfsd->nd_dpos; 1080 cred = nfsd->nd_cr; 1081 v3 = (nfsd->nd_flag & ND_NFSV3); 1082 LIST_INIT(&nfsd->nd_coalesce); 1083 nfsd->nd_mreq = NULL; 1084 nfsd->nd_stable = NFSV3WRITE_FILESYNC; 1085 getmicrotime(&now); 1086 cur_usec = (u_quad_t)now.tv_sec * 1000000 + (u_quad_t)now.tv_usec; 1087 nfsd->nd_time = cur_usec + nfsrvw_procrastinate; 1088 1089 /* 1090 * Now, get the write header.. 1091 */ 1092 nfsm_srvmtofh(&nfsd->nd_fh); 1093 if (v3) { 1094 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 1095 nfsd->nd_off = fxdr_hyper(tl); 1096 tl += 3; 1097 nfsd->nd_stable = fxdr_unsigned(int, *tl++); 1098 } else { 1099 nfsm_dissect(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1100 nfsd->nd_off = (off_t)fxdr_unsigned(u_int32_t, *++tl); 1101 tl += 2; 1102 } 1103 len = fxdr_unsigned(int32_t, *tl); 1104 nfsd->nd_len = len; 1105 nfsd->nd_eoff = nfsd->nd_off + len; 1106 1107 /* 1108 * Trim the header out of the mbuf list and trim off any trailing 1109 * junk so that the mbuf list has only the write data. 1110 */ 1111 zeroing = 1; 1112 i = 0; 1113 mp = mrep; 1114 while (mp) { 1115 if (mp == md) { 1116 zeroing = 0; 1117 adjust = dpos - mtod(mp, char *); 1118 mp->m_len -= adjust; 1119 if (mp->m_len > 0 && adjust > 0) 1120 NFSMADV(mp, adjust); 1121 } 1122 if (zeroing) 1123 mp->m_len = 0; 1124 else { 1125 i += mp->m_len; 1126 if (i > len) { 1127 mp->m_len -= (i - len); 1128 zeroing = 1; 1129 } 1130 } 1131 mp = mp->m_next; 1132 } 1133 if (len > NFS_MAXDATA || len < 0 || i < len) { 1134 nfsmout: 1135 m_freem(mrep); 1136 error = EIO; 1137 nfsm_writereply(2 * NFSX_UNSIGNED, v3); 1138 if (v3) 1139 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1140 nfsd->nd_mreq = mreq; 1141 nfsd->nd_mrep = NULL; 1142 nfsd->nd_time = 0; 1143 } 1144 1145 /* 1146 * Add this entry to the hash and time queues. 1147 */ 1148 owp = NULL; 1149 mutex_enter(&nfsd_lock); 1150 wp = LIST_FIRST(&slp->ns_tq); 1151 while (wp && wp->nd_time < nfsd->nd_time) { 1152 owp = wp; 1153 wp = LIST_NEXT(wp, nd_tq); 1154 } 1155 if (owp) { 1156 LIST_INSERT_AFTER(owp, nfsd, nd_tq); 1157 } else { 1158 LIST_INSERT_HEAD(&slp->ns_tq, nfsd, nd_tq); 1159 } 1160 if (nfsd->nd_mrep) { 1161 wpp = nfsrv_nwdelayhash(slp, &nfsd->nd_fh); 1162 owp = NULL; 1163 wp = LIST_FIRST(wpp); 1164 while (wp && nfsrv_comparefh(&nfsd->nd_fh, &wp->nd_fh)) { 1165 owp = wp; 1166 wp = LIST_NEXT(wp, nd_hash); 1167 } 1168 while (wp && wp->nd_off < nfsd->nd_off && 1169 !nfsrv_comparefh(&nfsd->nd_fh, &wp->nd_fh)) { 1170 owp = wp; 1171 wp = LIST_NEXT(wp, nd_hash); 1172 } 1173 if (owp) { 1174 LIST_INSERT_AFTER(owp, nfsd, nd_hash); 1175 1176 /* 1177 * Search the hash list for overlapping entries and 1178 * coalesce. 1179 */ 1180 for(; nfsd && NFSW_CONTIG(owp, nfsd); nfsd = wp) { 1181 wp = LIST_NEXT(nfsd, nd_hash); 1182 if (nfsrv_samecred(owp->nd_cr, nfsd->nd_cr)) 1183 nfsrvw_coalesce(owp, nfsd); 1184 } 1185 } else { 1186 LIST_INSERT_HEAD(wpp, nfsd, nd_hash); 1187 } 1188 } 1189 mutex_exit(&nfsd_lock); 1190 } 1191 1192 /* 1193 * Now, do VOP_WRITE()s for any one(s) that need to be done now 1194 * and generate the associated reply mbuf list(s). 1195 */ 1196 loop1: 1197 getmicrotime(&now); 1198 cur_usec = (u_quad_t)now.tv_sec * 1000000 + (u_quad_t)now.tv_usec; 1199 mutex_enter(&nfsd_lock); 1200 for (nfsd = LIST_FIRST(&slp->ns_tq); nfsd; nfsd = owp) { 1201 owp = LIST_NEXT(nfsd, nd_tq); 1202 if (nfsd->nd_time > cur_usec) 1203 break; 1204 if (nfsd->nd_mreq) 1205 continue; 1206 LIST_REMOVE(nfsd, nd_tq); 1207 LIST_REMOVE(nfsd, nd_hash); 1208 mutex_exit(&nfsd_lock); 1209 1210 mrep = nfsd->nd_mrep; 1211 nfsd->nd_mrep = NULL; 1212 cred = nfsd->nd_cr; 1213 v3 = (nfsd->nd_flag & ND_NFSV3); 1214 forat_ret = aftat_ret = 1; 1215 error = nfsrv_fhtovp(&nfsd->nd_fh, 1, &vp, cred, slp, 1216 nfsd->nd_nam, &rdonly, (nfsd->nd_flag & ND_KERBAUTH), 1217 false); 1218 if (!error) { 1219 if (v3) 1220 forat_ret = VOP_GETATTR(vp, &forat, cred); 1221 if (vp->v_type != VREG) { 1222 if (v3) 1223 error = EINVAL; 1224 else 1225 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 1226 } 1227 } else 1228 vp = NULL; 1229 if (!error) { 1230 nqsrv_getl(vp, ND_WRITE); 1231 error = nfsrv_access(vp, VWRITE, cred, rdonly, lwp, 1); 1232 } 1233 1234 if (nfsd->nd_stable == NFSV3WRITE_UNSTABLE) 1235 ioflags = IO_NODELOCKED; 1236 else if (nfsd->nd_stable == NFSV3WRITE_DATASYNC) 1237 ioflags = (IO_SYNC | IO_NODELOCKED); 1238 else 1239 ioflags = (IO_METASYNC | IO_SYNC | IO_NODELOCKED); 1240 uiop->uio_rw = UIO_WRITE; 1241 uiop->uio_offset = nfsd->nd_off; 1242 uiop->uio_resid = nfsd->nd_eoff - nfsd->nd_off; 1243 UIO_SETUP_SYSSPACE(uiop); 1244 if (uiop->uio_resid > 0) { 1245 mp = mrep; 1246 i = 0; 1247 while (mp) { 1248 if (mp->m_len > 0) 1249 i++; 1250 mp = mp->m_next; 1251 } 1252 uiop->uio_iovcnt = i; 1253 iov = malloc(i * sizeof (struct iovec), M_TEMP, M_WAITOK); 1254 uiop->uio_iov = ivp = iov; 1255 mp = mrep; 1256 while (mp) { 1257 if (mp->m_len > 0) { 1258 ivp->iov_base = mtod(mp, void *); 1259 ivp->iov_len = mp->m_len; 1260 ivp++; 1261 } 1262 mp = mp->m_next; 1263 } 1264 if (!error) { 1265 error = VOP_WRITE(vp, uiop, ioflags, cred); 1266 nfsstats.srvvop_writes++; 1267 } 1268 free((void *)iov, M_TEMP); 1269 } 1270 m_freem(mrep); 1271 if (vp) { 1272 aftat_ret = VOP_GETATTR(vp, &va, cred); 1273 vput(vp); 1274 } 1275 1276 /* 1277 * Loop around generating replies for all write rpcs that have 1278 * now been completed. 1279 */ 1280 swp = nfsd; 1281 do { 1282 if (error) { 1283 nfsm_writereply(NFSX_WCCDATA(v3), v3); 1284 if (v3) { 1285 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1286 } 1287 } else { 1288 nfsm_writereply(NFSX_PREOPATTR(v3) + 1289 NFSX_POSTOPORFATTR(v3) + 2 * NFSX_UNSIGNED + 1290 NFSX_WRITEVERF(v3), v3); 1291 if (v3) { 1292 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1293 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1294 *tl++ = txdr_unsigned(nfsd->nd_len); 1295 *tl++ = txdr_unsigned(swp->nd_stable); 1296 /* 1297 * Actually, there is no need to txdr these fields, 1298 * but it may make the values more human readable, 1299 * for debugging purposes. 1300 */ 1301 *tl++ = txdr_unsigned(boottime.tv_sec); 1302 *tl = txdr_unsigned(boottime.tv_nsec / 1000); 1303 } else { 1304 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 1305 nfsm_srvfillattr(&va, fp); 1306 } 1307 } 1308 nfsd->nd_mreq = mreq; 1309 if (nfsd->nd_mrep) 1310 panic("nfsrv_write: nd_mrep not free"); 1311 1312 /* 1313 * Done. Put it at the head of the timer queue so that 1314 * the final phase can return the reply. 1315 */ 1316 mutex_enter(&nfsd_lock); 1317 if (nfsd != swp) { 1318 nfsd->nd_time = 0; 1319 LIST_INSERT_HEAD(&slp->ns_tq, nfsd, nd_tq); 1320 } 1321 nfsd = LIST_FIRST(&swp->nd_coalesce); 1322 if (nfsd) { 1323 LIST_REMOVE(nfsd, nd_tq); 1324 } 1325 mutex_exit(&nfsd_lock); 1326 } while (nfsd); 1327 swp->nd_time = 0; 1328 1329 mutex_enter(&nfsd_lock); 1330 LIST_INSERT_HEAD(&slp->ns_tq, swp, nd_tq); 1331 mutex_exit(&nfsd_lock); 1332 goto loop1; 1333 } 1334 mutex_exit(&nfsd_lock); 1335 nfs_timer_start(); 1336 1337 /* 1338 * Search for a reply to return. 1339 */ 1340 mutex_enter(&nfsd_lock); 1341 LIST_FOREACH(nfsd, &slp->ns_tq, nd_tq) { 1342 if (nfsd->nd_mreq) { 1343 LIST_REMOVE(nfsd, nd_tq); 1344 *mrq = nfsd->nd_mreq; 1345 *ndp = nfsd; 1346 break; 1347 } 1348 } 1349 mutex_exit(&nfsd_lock); 1350 return (0); 1351 } 1352 1353 /* 1354 * Coalesce the write request nfsd into owp. To do this we must: 1355 * - remove nfsd from the queues 1356 * - merge nfsd->nd_mrep into owp->nd_mrep 1357 * - update the nd_eoff and nd_stable for owp 1358 * - put nfsd on owp's nd_coalesce list 1359 * NB: Must be called at splsoftclock(). 1360 */ 1361 void 1362 nfsrvw_coalesce(struct nfsrv_descript *owp, struct nfsrv_descript *nfsd) 1363 { 1364 int overlap; 1365 struct mbuf *mp; 1366 struct nfsrv_descript *m; 1367 1368 KASSERT(mutex_owned(&nfsd_lock)); 1369 1370 LIST_REMOVE(nfsd, nd_hash); 1371 LIST_REMOVE(nfsd, nd_tq); 1372 if (owp->nd_eoff < nfsd->nd_eoff) { 1373 overlap = owp->nd_eoff - nfsd->nd_off; 1374 if (overlap < 0) 1375 panic("nfsrv_coalesce: bad off"); 1376 if (overlap > 0) 1377 m_adj(nfsd->nd_mrep, overlap); 1378 mp = owp->nd_mrep; 1379 while (mp->m_next) 1380 mp = mp->m_next; 1381 mp->m_next = nfsd->nd_mrep; 1382 owp->nd_eoff = nfsd->nd_eoff; 1383 } else 1384 m_freem(nfsd->nd_mrep); 1385 nfsd->nd_mrep = NULL; 1386 if (nfsd->nd_stable == NFSV3WRITE_FILESYNC) 1387 owp->nd_stable = NFSV3WRITE_FILESYNC; 1388 else if (nfsd->nd_stable == NFSV3WRITE_DATASYNC && 1389 owp->nd_stable == NFSV3WRITE_UNSTABLE) 1390 owp->nd_stable = NFSV3WRITE_DATASYNC; 1391 LIST_INSERT_HEAD(&owp->nd_coalesce, nfsd, nd_tq); 1392 /* 1393 * nfsd might hold coalesce elements! Move them to owp. 1394 * Otherwise, requests may be lost and clients will be stuck. 1395 */ 1396 while ((m = LIST_FIRST(&nfsd->nd_coalesce)) != NULL) { 1397 LIST_REMOVE(m, nd_tq); 1398 LIST_INSERT_HEAD(&owp->nd_coalesce, m, nd_tq); 1399 } 1400 } 1401 1402 /* 1403 * nfs create service 1404 * now does a truncate to 0 length via. setattr if it already exists 1405 */ 1406 int 1407 nfsrv_create(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 1408 { 1409 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1410 struct mbuf *nam = nfsd->nd_nam; 1411 char *dpos = nfsd->nd_dpos; 1412 kauth_cred_t cred = nfsd->nd_cr; 1413 struct nfs_fattr *fp; 1414 struct vattr va, dirfor, diraft; 1415 struct nfsv2_sattr *sp; 1416 u_int32_t *tl; 1417 struct nameidata nd; 1418 char *cp; 1419 int32_t t1; 1420 char *bpos; 1421 int error = 0, cache = 0, len, tsize, dirfor_ret = 1, diraft_ret = 1; 1422 int rdev = 0, abort = 0; 1423 int v3 = (nfsd->nd_flag & ND_NFSV3), how, exclusive_flag = 0; 1424 char *cp2; 1425 struct mbuf *mb, *mreq __unused; 1426 struct vnode *vp = NULL, *dirp = NULL; 1427 nfsrvfh_t nsfh; 1428 u_quad_t frev, tempsize; 1429 u_char cverf[NFSX_V3CREATEVERF]; 1430 1431 nd.ni_cnd.cn_nameiop = 0; 1432 nfsm_srvmtofh(&nsfh); 1433 nfsm_srvnamesiz(len); 1434 nd.ni_cnd.cn_cred = cred; 1435 nd.ni_cnd.cn_nameiop = CREATE; 1436 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 1437 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 1438 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 1439 if (dirp && v3) { 1440 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); 1441 } 1442 if (error) { 1443 nfsm_reply(NFSX_WCCDATA(v3)); 1444 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1445 if (dirp) 1446 vrele(dirp); 1447 if (nd.ni_pathbuf != NULL) { 1448 pathbuf_destroy(nd.ni_pathbuf); 1449 nd.ni_pathbuf = NULL; 1450 } 1451 return (0); 1452 } 1453 abort = 1; 1454 vattr_null(&va); 1455 if (v3) { 1456 va.va_mode = 0; 1457 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1458 how = fxdr_unsigned(int, *tl); 1459 switch (how) { 1460 case NFSV3CREATE_GUARDED: 1461 if (nd.ni_vp) { 1462 error = EEXIST; 1463 break; 1464 } 1465 case NFSV3CREATE_UNCHECKED: 1466 nfsm_srvsattr(&va); 1467 break; 1468 case NFSV3CREATE_EXCLUSIVE: 1469 nfsm_dissect(cp, void *, NFSX_V3CREATEVERF); 1470 memcpy(cverf, cp, NFSX_V3CREATEVERF); 1471 exclusive_flag = 1; 1472 break; 1473 }; 1474 va.va_type = VREG; 1475 } else { 1476 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1477 va.va_type = IFTOVT(fxdr_unsigned(u_int32_t, sp->sa_mode)); 1478 if (va.va_type == VNON) 1479 va.va_type = VREG; 1480 va.va_mode = nfstov_mode(sp->sa_mode); 1481 switch (va.va_type) { 1482 case VREG: 1483 tsize = fxdr_unsigned(int32_t, sp->sa_size); 1484 if (tsize != -1) 1485 va.va_size = (u_quad_t)tsize; 1486 break; 1487 case VCHR: 1488 case VBLK: 1489 case VFIFO: 1490 rdev = fxdr_unsigned(int32_t, sp->sa_size); 1491 break; 1492 default: 1493 break; 1494 }; 1495 } 1496 1497 /* 1498 * Iff doesn't exist, create it 1499 * otherwise just truncate to 0 length 1500 * should I set the mode too ?? 1501 */ 1502 if (nd.ni_vp == NULL) { 1503 if (va.va_type == VREG || va.va_type == VSOCK) { 1504 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1505 error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1506 if (!error) { 1507 if (exclusive_flag) { 1508 exclusive_flag = 0; 1509 vattr_null(&va); 1510 /* 1511 * XXX 1512 * assuming NFSX_V3CREATEVERF 1513 * == sizeof(nfstime3) 1514 */ 1515 fxdr_nfsv3time(cverf, &va.va_atime); 1516 error = VOP_SETATTR(nd.ni_vp, &va, 1517 cred); 1518 } 1519 } 1520 } else if (va.va_type == VCHR || va.va_type == VBLK || 1521 va.va_type == VFIFO) { 1522 if (va.va_type == VCHR && rdev == 0xffffffff) 1523 va.va_type = VFIFO; 1524 if (va.va_type != VFIFO && 1525 (error = kauth_authorize_system(cred, 1526 KAUTH_SYSTEM_MKNOD, 0, NULL, NULL, NULL))) { 1527 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1528 vput(nd.ni_dvp); 1529 abort = 0; 1530 nfsm_reply(0); 1531 if (nd.ni_pathbuf != NULL) { 1532 pathbuf_destroy(nd.ni_pathbuf); 1533 nd.ni_pathbuf = NULL; 1534 } 1535 return (error); 1536 } else 1537 va.va_rdev = (dev_t)rdev; 1538 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1539 error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, 1540 &va); 1541 if (error) { 1542 nfsm_reply(0); 1543 } 1544 } else { 1545 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1546 if (nd.ni_pathbuf != NULL) { 1547 pathbuf_destroy(nd.ni_pathbuf); 1548 nd.ni_pathbuf = NULL; 1549 } 1550 vput(nd.ni_dvp); 1551 error = ENXIO; 1552 abort = 0; 1553 } 1554 vp = nd.ni_vp; 1555 } else { 1556 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1557 if (nd.ni_pathbuf != NULL) { 1558 pathbuf_destroy(nd.ni_pathbuf); 1559 nd.ni_pathbuf = NULL; 1560 } 1561 vp = nd.ni_vp; 1562 if (nd.ni_dvp == vp) 1563 vrele(nd.ni_dvp); 1564 else 1565 vput(nd.ni_dvp); 1566 abort = 0; 1567 if (!error && va.va_size != -1) { 1568 error = nfsrv_access(vp, VWRITE, cred, 1569 (nd.ni_cnd.cn_flags & RDONLY), lwp, 0); 1570 if (!error) { 1571 nqsrv_getl(vp, ND_WRITE); 1572 tempsize = va.va_size; 1573 vattr_null(&va); 1574 va.va_size = tempsize; 1575 error = VOP_SETATTR(vp, &va, cred); 1576 } 1577 } 1578 if (error) 1579 vput(vp); 1580 } 1581 if (!error) { 1582 error = nfsrv_composefh(vp, &nsfh, v3); 1583 if (!error) 1584 error = VOP_GETATTR(vp, &va, cred); 1585 vput(vp); 1586 } 1587 if (v3) { 1588 if (exclusive_flag && !error) { 1589 /* 1590 * XXX assuming NFSX_V3CREATEVERF == sizeof(nfstime3) 1591 */ 1592 char oldverf[NFSX_V3CREATEVERF]; 1593 1594 txdr_nfsv3time(&va.va_atime, oldverf); 1595 if (memcmp(cverf, oldverf, NFSX_V3CREATEVERF)) 1596 error = EEXIST; 1597 } 1598 if (dirp) { 1599 vn_lock(dirp, LK_SHARED | LK_RETRY); 1600 diraft_ret = VOP_GETATTR(dirp, &diraft, cred); 1601 VOP_UNLOCK(dirp); 1602 } 1603 } 1604 if (dirp) { 1605 vrele(dirp); 1606 dirp = NULL; 1607 } 1608 if (nd.ni_pathbuf != NULL) { 1609 pathbuf_destroy(nd.ni_pathbuf); 1610 nd.ni_pathbuf = NULL; 1611 } 1612 abort = 0; 1613 nfsm_reply(NFSX_SRVFH(&nsfh, v3) + NFSX_FATTR(v3) + NFSX_WCCDATA(v3)); 1614 if (v3) { 1615 if (!error) { 1616 nfsm_srvpostop_fh(&nsfh); 1617 nfsm_srvpostop_attr(0, &va); 1618 } 1619 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1620 } else { 1621 nfsm_srvfhtom(&nsfh, v3); 1622 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 1623 nfsm_srvfillattr(&va, fp); 1624 } 1625 return (0); 1626 nfsmout: 1627 if (dirp) 1628 vrele(dirp); 1629 if (abort) { 1630 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1631 if (nd.ni_dvp == nd.ni_vp) 1632 vrele(nd.ni_dvp); 1633 else 1634 vput(nd.ni_dvp); 1635 if (nd.ni_vp) 1636 vput(nd.ni_vp); 1637 } 1638 if (nd.ni_pathbuf != NULL) { 1639 pathbuf_destroy(nd.ni_pathbuf); 1640 nd.ni_pathbuf = NULL; 1641 } 1642 return (error); 1643 } 1644 1645 /* 1646 * nfs v3 mknod service 1647 */ 1648 int 1649 nfsrv_mknod(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 1650 { 1651 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1652 struct mbuf *nam = nfsd->nd_nam; 1653 char *dpos = nfsd->nd_dpos; 1654 kauth_cred_t cred = nfsd->nd_cr; 1655 struct vattr va, dirfor, diraft; 1656 u_int32_t *tl; 1657 struct nameidata nd; 1658 int32_t t1; 1659 char *bpos; 1660 int error = 0, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 1661 int abort = 0; 1662 u_int32_t major, minor; 1663 enum vtype vtyp; 1664 char *cp2; 1665 struct mbuf *mb, *mreq __unused; 1666 struct vnode *vp, *dirp = (struct vnode *)0; 1667 nfsrvfh_t nsfh; 1668 u_quad_t frev; 1669 1670 nd.ni_cnd.cn_nameiop = 0; 1671 nfsm_srvmtofh(&nsfh); 1672 nfsm_srvnamesiz(len); 1673 nd.ni_cnd.cn_cred = cred; 1674 nd.ni_cnd.cn_nameiop = CREATE; 1675 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 1676 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 1677 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 1678 if (dirp) 1679 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); 1680 if (error) { 1681 nfsm_reply(NFSX_WCCDATA(1)); 1682 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1683 if (dirp) 1684 vrele(dirp); 1685 if (nd.ni_pathbuf != NULL) { 1686 pathbuf_destroy(nd.ni_pathbuf); 1687 nd.ni_pathbuf = NULL; 1688 } 1689 return (0); 1690 } 1691 abort = 1; 1692 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1693 vtyp = nfsv3tov_type(*tl); 1694 if (vtyp != VCHR && vtyp != VBLK && vtyp != VSOCK && vtyp != VFIFO) { 1695 error = NFSERR_BADTYPE; 1696 goto abort; 1697 } 1698 vattr_null(&va); 1699 va.va_mode = 0; 1700 nfsm_srvsattr(&va); 1701 if (vtyp == VCHR || vtyp == VBLK) { 1702 dev_t rdev; 1703 1704 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1705 major = fxdr_unsigned(u_int32_t, *tl++); 1706 minor = fxdr_unsigned(u_int32_t, *tl); 1707 rdev = makedev(major, minor); 1708 if (major(rdev) != major || minor(rdev) != minor) { 1709 error = EINVAL; 1710 goto abort; 1711 } 1712 va.va_rdev = rdev; 1713 } 1714 1715 /* 1716 * Iff doesn't exist, create it. 1717 */ 1718 if (nd.ni_vp) { 1719 error = EEXIST; 1720 abort: 1721 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1722 if (nd.ni_dvp == nd.ni_vp) 1723 vrele(nd.ni_dvp); 1724 else 1725 vput(nd.ni_dvp); 1726 if (nd.ni_vp) 1727 vput(nd.ni_vp); 1728 if (nd.ni_pathbuf != NULL) { 1729 pathbuf_destroy(nd.ni_pathbuf); 1730 nd.ni_pathbuf = NULL; 1731 } 1732 goto out; 1733 } 1734 va.va_type = vtyp; 1735 if (vtyp == VSOCK) { 1736 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1737 error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1738 } else { 1739 if (va.va_type != VFIFO && 1740 (error = kauth_authorize_system(cred, 1741 KAUTH_SYSTEM_MKNOD, 0, NULL, NULL, NULL))) { 1742 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1743 vput(nd.ni_dvp); 1744 goto out; 1745 } 1746 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1747 error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1748 if (error) 1749 goto out; 1750 } 1751 out: 1752 vp = nd.ni_vp; 1753 if (!error) { 1754 error = nfsrv_composefh(vp, &nsfh, true); 1755 if (!error) 1756 error = VOP_GETATTR(vp, &va, cred); 1757 vput(vp); 1758 } 1759 if (dirp) { 1760 vn_lock(dirp, LK_SHARED | LK_RETRY); 1761 diraft_ret = VOP_GETATTR(dirp, &diraft, cred); 1762 VOP_UNLOCK(dirp); 1763 vrele(dirp); 1764 dirp = NULL; 1765 } 1766 if (nd.ni_pathbuf != NULL) { 1767 pathbuf_destroy(nd.ni_pathbuf); 1768 nd.ni_pathbuf = NULL; 1769 } 1770 abort = 0; 1771 nfsm_reply(NFSX_SRVFH(&nsfh, true) + NFSX_POSTOPATTR(1) + 1772 NFSX_WCCDATA(1)); 1773 if (!error) { 1774 nfsm_srvpostop_fh(&nsfh); 1775 nfsm_srvpostop_attr(0, &va); 1776 } 1777 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1778 return (0); 1779 nfsmout: 1780 if (abort) { 1781 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1782 if (nd.ni_dvp == nd.ni_vp) 1783 vrele(nd.ni_dvp); 1784 else 1785 vput(nd.ni_dvp); 1786 if (nd.ni_vp) 1787 vput(nd.ni_vp); 1788 } 1789 if (nd.ni_pathbuf != NULL) { 1790 pathbuf_destroy(nd.ni_pathbuf); 1791 nd.ni_pathbuf = NULL; 1792 } 1793 if (dirp) 1794 vrele(dirp); 1795 return (error); 1796 } 1797 1798 /* 1799 * nfs remove service 1800 */ 1801 int 1802 nfsrv_remove(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 1803 { 1804 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1805 struct mbuf *nam = nfsd->nd_nam; 1806 char *dpos = nfsd->nd_dpos; 1807 kauth_cred_t cred = nfsd->nd_cr; 1808 struct nameidata nd; 1809 u_int32_t *tl; 1810 int32_t t1; 1811 char *bpos; 1812 int error = 0, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 1813 int v3 = (nfsd->nd_flag & ND_NFSV3); 1814 char *cp2; 1815 struct mbuf *mb, *mreq __unused; 1816 struct vnode *vp, *dirp; 1817 struct vattr dirfor, diraft; 1818 nfsrvfh_t nsfh; 1819 u_quad_t frev; 1820 1821 #ifndef nolint 1822 vp = (struct vnode *)0; 1823 #endif 1824 nfsm_srvmtofh(&nsfh); 1825 nfsm_srvnamesiz(len); 1826 nd.ni_cnd.cn_cred = cred; 1827 nd.ni_cnd.cn_nameiop = DELETE; 1828 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 1829 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 1830 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 1831 if (error == 0 && dirp && v3) { 1832 if (nd.ni_dvp == nd.ni_vp) 1833 vn_lock(dirp, LK_SHARED | LK_RETRY); 1834 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); 1835 if (nd.ni_dvp == nd.ni_vp) 1836 VOP_UNLOCK(dirp); 1837 } 1838 if (!error) { 1839 vp = nd.ni_vp; 1840 if (vp->v_type == VDIR) { 1841 error = EPERM; 1842 goto out; 1843 } 1844 /* 1845 * The root of a mounted filesystem cannot be deleted. 1846 */ 1847 if (vp->v_vflag & VV_ROOT) { 1848 error = EBUSY; 1849 } 1850 out: 1851 if (!error) { 1852 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1853 nqsrv_getl(vp, ND_WRITE); 1854 error = VOP_REMOVE(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); 1855 } else { 1856 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1857 if (nd.ni_dvp == vp) 1858 vrele(nd.ni_dvp); 1859 else 1860 vput(nd.ni_dvp); 1861 vput(vp); 1862 } 1863 } 1864 if (nd.ni_pathbuf != NULL) { 1865 pathbuf_destroy(nd.ni_pathbuf); 1866 nd.ni_pathbuf = NULL; 1867 } 1868 if (dirp) { 1869 if (v3) { 1870 vn_lock(dirp, LK_SHARED | LK_RETRY); 1871 diraft_ret = VOP_GETATTR(dirp, &diraft, cred); 1872 VOP_UNLOCK(dirp); 1873 } 1874 vrele(dirp); 1875 } 1876 nfsm_reply(NFSX_WCCDATA(v3)); 1877 if (v3) { 1878 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1879 return (0); 1880 } 1881 nfsm_srvdone; 1882 } 1883 1884 /* 1885 * nfs rename service 1886 */ 1887 int 1888 nfsrv_rename(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 1889 { 1890 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1891 struct mbuf *nam = nfsd->nd_nam; 1892 char *dpos = nfsd->nd_dpos; 1893 kauth_cred_t cred = nfsd->nd_cr; 1894 u_int32_t *tl; 1895 int32_t t1; 1896 char *bpos; 1897 int error = 0, cache = 0, fdirfor_ret = 1, fdiraft_ret = 1; 1898 uint32_t len, len2; 1899 int tdirfor_ret = 1, tdiraft_ret = 1; 1900 int v3 = (nfsd->nd_flag & ND_NFSV3); 1901 char *cp2; 1902 struct mbuf *mb, *mreq __unused; 1903 struct nameidata fromnd, tond; 1904 struct vnode *fvp, *tvp, *tdvp; 1905 struct vnode *fdirp = NULL, *tdirp = NULL; 1906 struct mount *localfs = NULL; 1907 struct vattr fdirfor, fdiraft, tdirfor, tdiraft; 1908 nfsrvfh_t fnsfh, tnsfh; 1909 u_quad_t frev; 1910 uid_t saved_uid; 1911 1912 #ifndef nolint 1913 fvp = (struct vnode *)0; 1914 #endif 1915 fromnd.ni_cnd.cn_nameiop = 0; 1916 tond.ni_cnd.cn_nameiop = 0; 1917 nfsm_srvmtofh(&fnsfh); 1918 nfsm_srvnamesiz(len); 1919 /* 1920 * Remember our original uid so that we can reset cr_uid before 1921 * the second nfs_namei() call, in case it is remapped. 1922 */ 1923 saved_uid = kauth_cred_geteuid(cred); 1924 fromnd.ni_cnd.cn_cred = cred; 1925 fromnd.ni_cnd.cn_nameiop = DELETE; 1926 fromnd.ni_cnd.cn_flags = LOCKPARENT | INRENAME; 1927 error = nfs_namei(&fromnd, &fnsfh, len, slp, nam, &md, 1928 &dpos, &fdirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 1929 if (error == 0 && fdirp && v3) { 1930 if (fromnd.ni_dvp == fromnd.ni_vp) 1931 vn_lock(fdirp, LK_SHARED | LK_RETRY); 1932 fdirfor_ret = VOP_GETATTR(fdirp, &fdirfor, cred); 1933 if (fromnd.ni_dvp == fromnd.ni_vp) 1934 VOP_UNLOCK(fdirp); 1935 } 1936 if (error) { 1937 fromnd.ni_cnd.cn_nameiop = 0; 1938 nfsm_reply(2 * NFSX_WCCDATA(v3)); 1939 nfsm_srvwcc_data(fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft); 1940 nfsm_srvwcc_data(tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft); 1941 if (fdirp) 1942 vrele(fdirp); 1943 if (fromnd.ni_pathbuf != NULL) { 1944 pathbuf_destroy(fromnd.ni_pathbuf); 1945 } 1946 return (0); 1947 } 1948 if (fromnd.ni_dvp != fromnd.ni_vp) { 1949 VOP_UNLOCK(fromnd.ni_dvp); 1950 } 1951 fvp = fromnd.ni_vp; 1952 1953 localfs = fvp->v_mount; 1954 error = VFS_RENAMELOCK_ENTER(localfs); 1955 if (error) { 1956 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 1957 vrele(fromnd.ni_dvp); 1958 vrele(fvp); 1959 goto out1; 1960 } 1961 1962 /* Copied, regrettably, from vfs_syscalls.c (q.v.) */ 1963 vrele(fvp); 1964 if ((fromnd.ni_cnd.cn_namelen == 1 && 1965 fromnd.ni_cnd.cn_nameptr[0] == '.') || 1966 (fromnd.ni_cnd.cn_namelen == 2 && 1967 fromnd.ni_cnd.cn_nameptr[0] == '.' && 1968 fromnd.ni_cnd.cn_nameptr[1] == '.')) { 1969 error = EINVAL; 1970 VFS_RENAMELOCK_EXIT(localfs); 1971 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 1972 vrele(fromnd.ni_dvp); 1973 goto out1; 1974 } 1975 vn_lock(fromnd.ni_dvp, LK_EXCLUSIVE | LK_RETRY); 1976 error = relookup(fromnd.ni_dvp, &fromnd.ni_vp, &fromnd.ni_cnd, 0); 1977 if (error) { 1978 VOP_UNLOCK(fromnd.ni_dvp); 1979 VFS_RENAMELOCK_EXIT(localfs); 1980 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 1981 vrele(fromnd.ni_dvp); 1982 goto out1; 1983 } 1984 VOP_UNLOCK(fromnd.ni_vp); 1985 if (fromnd.ni_dvp != fromnd.ni_vp) 1986 VOP_UNLOCK(fromnd.ni_dvp); 1987 fvp = fromnd.ni_vp; 1988 1989 nfsm_srvmtofh(&tnsfh); 1990 if (v3) { 1991 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 1992 len2 = fxdr_unsigned(uint32_t, *tl); 1993 /* len2 will be checked by nfs_namei */ 1994 } 1995 else { 1996 /* NFSv2 */ 1997 nfsm_strsiz(len2, NFS_MAXNAMLEN); 1998 } 1999 kauth_cred_seteuid(cred, saved_uid); 2000 tond.ni_cnd.cn_cred = cred; 2001 tond.ni_cnd.cn_nameiop = RENAME; 2002 tond.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF | NOCACHE | INRENAME; 2003 error = nfs_namei(&tond, &tnsfh, len2, slp, nam, &md, 2004 &dpos, &tdirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 2005 if (tdirp && v3) { 2006 tdirfor_ret = VOP_GETATTR(tdirp, &tdirfor, cred); 2007 } 2008 if (error) { 2009 VFS_RENAMELOCK_EXIT(localfs); 2010 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 2011 vrele(fromnd.ni_dvp); 2012 vrele(fvp); 2013 goto out1; 2014 } 2015 tdvp = tond.ni_dvp; 2016 tvp = tond.ni_vp; 2017 if (tvp != NULL) { 2018 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 2019 if (v3) 2020 error = EEXIST; 2021 else 2022 error = EISDIR; 2023 goto out; 2024 } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 2025 if (v3) 2026 error = EEXIST; 2027 else 2028 error = ENOTDIR; 2029 goto out; 2030 } 2031 if (tvp->v_type == VDIR && tvp->v_mountedhere) { 2032 if (v3) 2033 error = EXDEV; 2034 else 2035 error = ENOTEMPTY; 2036 goto out; 2037 } 2038 } 2039 if (fvp->v_type == VDIR && fvp->v_mountedhere) { 2040 if (v3) 2041 error = EXDEV; 2042 else 2043 error = ENOTEMPTY; 2044 goto out; 2045 } 2046 if (fvp->v_mount != tdvp->v_mount) { 2047 if (v3) 2048 error = EXDEV; 2049 else 2050 error = ENOTEMPTY; 2051 goto out; 2052 } 2053 if (fvp == tdvp) { 2054 if (v3) 2055 error = EINVAL; 2056 else 2057 error = ENOTEMPTY; 2058 } 2059 /* 2060 * If source is the same as the destination (that is the 2061 * same vnode with the same name in the same directory), 2062 * then there is nothing to do. 2063 */ 2064 if (fvp == tvp && fromnd.ni_dvp == tdvp && 2065 fromnd.ni_cnd.cn_namelen == tond.ni_cnd.cn_namelen && 2066 !memcmp(fromnd.ni_cnd.cn_nameptr, tond.ni_cnd.cn_nameptr, 2067 fromnd.ni_cnd.cn_namelen)) 2068 error = -1; 2069 out: 2070 if (!error) { 2071 nqsrv_getl(fromnd.ni_dvp, ND_WRITE); 2072 nqsrv_getl(tdvp, ND_WRITE); 2073 if (tvp) { 2074 nqsrv_getl(tvp, ND_WRITE); 2075 } 2076 error = VOP_RENAME(fromnd.ni_dvp, fromnd.ni_vp, &fromnd.ni_cnd, 2077 tond.ni_dvp, tond.ni_vp, &tond.ni_cnd); 2078 VFS_RENAMELOCK_EXIT(localfs); 2079 } else { 2080 VOP_ABORTOP(tond.ni_dvp, &tond.ni_cnd); 2081 if (tdvp == tvp) 2082 vrele(tdvp); 2083 else 2084 vput(tdvp); 2085 if (tvp) 2086 vput(tvp); 2087 VFS_RENAMELOCK_EXIT(localfs); 2088 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 2089 vrele(fromnd.ni_dvp); 2090 vrele(fvp); 2091 if (error == -1) 2092 error = 0; 2093 } 2094 if (tond.ni_pathbuf != NULL) { 2095 pathbuf_destroy(tond.ni_pathbuf); 2096 tond.ni_pathbuf = NULL; 2097 } 2098 tond.ni_cnd.cn_nameiop = 0; 2099 out1: 2100 if (fdirp) { 2101 if (v3) { 2102 vn_lock(fdirp, LK_SHARED | LK_RETRY); 2103 fdiraft_ret = VOP_GETATTR(fdirp, &fdiraft, cred); 2104 VOP_UNLOCK(fdirp); 2105 } 2106 vrele(fdirp); 2107 fdirp = NULL; 2108 } 2109 if (tdirp) { 2110 if (v3) { 2111 vn_lock(tdirp, LK_SHARED | LK_RETRY); 2112 tdiraft_ret = VOP_GETATTR(tdirp, &tdiraft, cred); 2113 VOP_UNLOCK(tdirp); 2114 } 2115 vrele(tdirp); 2116 tdirp = NULL; 2117 } 2118 pathbuf_destroy(fromnd.ni_pathbuf); 2119 fromnd.ni_pathbuf = NULL; 2120 fromnd.ni_cnd.cn_nameiop = 0; 2121 localfs = NULL; 2122 nfsm_reply(2 * NFSX_WCCDATA(v3)); 2123 if (v3) { 2124 nfsm_srvwcc_data(fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft); 2125 nfsm_srvwcc_data(tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft); 2126 } 2127 return (0); 2128 2129 nfsmout: 2130 if (fdirp) 2131 vrele(fdirp); 2132 #ifdef notdef 2133 if (tdirp) 2134 vrele(tdirp); 2135 #endif 2136 if (tond.ni_cnd.cn_nameiop) { 2137 if (tond.ni_pathbuf != NULL) { 2138 pathbuf_destroy(tond.ni_pathbuf); 2139 tond.ni_pathbuf = NULL; 2140 } 2141 } 2142 if (localfs) { 2143 VFS_RENAMELOCK_EXIT(localfs); 2144 } 2145 if (fromnd.ni_cnd.cn_nameiop) { 2146 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 2147 if (fromnd.ni_pathbuf != NULL) { 2148 pathbuf_destroy(fromnd.ni_pathbuf); 2149 fromnd.ni_pathbuf = NULL; 2150 } 2151 vrele(fromnd.ni_dvp); 2152 vrele(fvp); 2153 } 2154 return (error); 2155 } 2156 2157 /* 2158 * nfs link service 2159 */ 2160 int 2161 nfsrv_link(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 2162 { 2163 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2164 struct mbuf *nam = nfsd->nd_nam; 2165 char *dpos = nfsd->nd_dpos; 2166 kauth_cred_t cred = nfsd->nd_cr; 2167 struct nameidata nd; 2168 u_int32_t *tl; 2169 int32_t t1; 2170 char *bpos; 2171 int error = 0, rdonly, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 2172 int getret = 1, v3 = (nfsd->nd_flag & ND_NFSV3); 2173 char *cp2; 2174 struct mbuf *mb, *mreq __unused; 2175 struct vnode *vp, *xp, *dirp = (struct vnode *)0; 2176 struct vattr dirfor, diraft, at; 2177 nfsrvfh_t nsfh, dnsfh; 2178 u_quad_t frev; 2179 2180 nfsm_srvmtofh(&nsfh); 2181 nfsm_srvmtofh(&dnsfh); 2182 nfsm_srvnamesiz(len); 2183 error = nfsrv_fhtovp(&nsfh, false, &vp, cred, slp, nam, 2184 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 2185 if (error) { 2186 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2187 nfsm_srvpostop_attr(getret, &at); 2188 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2189 return (0); 2190 } 2191 if (vp->v_type == VDIR) { 2192 error = EPERM; 2193 goto out1; 2194 } 2195 nd.ni_cnd.cn_cred = cred; 2196 nd.ni_cnd.cn_nameiop = CREATE; 2197 nd.ni_cnd.cn_flags = LOCKPARENT; 2198 error = nfs_namei(&nd, &dnsfh, len, slp, nam, &md, &dpos, 2199 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 2200 if (dirp && v3) { 2201 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); 2202 } 2203 if (error) 2204 goto out1; 2205 xp = nd.ni_vp; 2206 if (xp != NULL) { 2207 error = EEXIST; 2208 goto out; 2209 } 2210 xp = nd.ni_dvp; 2211 if (vp->v_mount != xp->v_mount) 2212 error = EXDEV; 2213 out: 2214 if (!error) { 2215 nqsrv_getl(vp, ND_WRITE); 2216 nqsrv_getl(xp, ND_WRITE); 2217 error = VOP_LINK(nd.ni_dvp, vp, &nd.ni_cnd); 2218 } else { 2219 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2220 if (nd.ni_dvp == nd.ni_vp) 2221 vrele(nd.ni_dvp); 2222 else 2223 vput(nd.ni_dvp); 2224 if (nd.ni_vp) 2225 vrele(nd.ni_vp); 2226 } 2227 out1: 2228 if (v3) { 2229 vn_lock(vp, LK_SHARED | LK_RETRY); 2230 getret = VOP_GETATTR(vp, &at, cred); 2231 VOP_UNLOCK(vp); 2232 } 2233 if (dirp) { 2234 if (v3) { 2235 vn_lock(dirp, LK_SHARED | LK_RETRY); 2236 diraft_ret = VOP_GETATTR(dirp, &diraft, cred); 2237 VOP_UNLOCK(dirp); 2238 } 2239 vrele(dirp); 2240 } 2241 vrele(vp); 2242 if (nd.ni_pathbuf != NULL) { 2243 pathbuf_destroy(nd.ni_pathbuf); 2244 nd.ni_pathbuf = NULL; 2245 } 2246 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2247 if (v3) { 2248 nfsm_srvpostop_attr(getret, &at); 2249 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2250 return (0); 2251 } 2252 nfsm_srvdone; 2253 } 2254 2255 /* 2256 * nfs symbolic link service 2257 */ 2258 int 2259 nfsrv_symlink(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 2260 { 2261 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2262 struct mbuf *nam = nfsd->nd_nam; 2263 char *dpos = nfsd->nd_dpos; 2264 kauth_cred_t cred = nfsd->nd_cr; 2265 struct vattr va, dirfor, diraft; 2266 struct nameidata nd; 2267 u_int32_t *tl; 2268 int32_t t1; 2269 struct nfsv2_sattr *sp; 2270 char *bpos, *pathcp = NULL, *cp2; 2271 struct uio io; 2272 struct iovec iv; 2273 int error = 0, cache = 0, dirfor_ret = 1, diraft_ret = 1, abort = 0; 2274 uint32_t len, len2; 2275 int v3 = (nfsd->nd_flag & ND_NFSV3); 2276 struct mbuf *mb, *mreq __unused; 2277 struct vnode *dirp = (struct vnode *)0; 2278 nfsrvfh_t nsfh; 2279 u_quad_t frev; 2280 2281 nd.ni_cnd.cn_nameiop = 0; 2282 nfsm_srvmtofh(&nsfh); 2283 nfsm_srvnamesiz(len); 2284 nd.ni_cnd.cn_cred = cred; 2285 nd.ni_cnd.cn_nameiop = CREATE; 2286 nd.ni_cnd.cn_flags = LOCKPARENT; 2287 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 2288 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 2289 if (dirp && v3) { 2290 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); 2291 } 2292 if (error) 2293 goto out; 2294 abort = 1; 2295 vattr_null(&va); 2296 va.va_type = VLNK; 2297 if (v3) { 2298 va.va_mode = 0; 2299 nfsm_srvsattr(&va); 2300 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 2301 len2 = fxdr_unsigned(uint32_t, *tl); 2302 if (len2 > PATH_MAX) { 2303 /* XXX should check _PC_NO_TRUNC */ 2304 error = ENAMETOOLONG; 2305 goto abortop; 2306 } 2307 } 2308 else { 2309 /* NFSv2 */ 2310 nfsm_strsiz(len2, NFS_MAXPATHLEN); 2311 } 2312 pathcp = malloc(len2 + 1, M_TEMP, M_WAITOK); 2313 iv.iov_base = pathcp; 2314 iv.iov_len = len2; 2315 io.uio_resid = len2; 2316 io.uio_offset = 0; 2317 io.uio_iov = &iv; 2318 io.uio_iovcnt = 1; 2319 io.uio_rw = UIO_READ; 2320 UIO_SETUP_SYSSPACE(&io); 2321 nfsm_mtouio(&io, len2); 2322 if (!v3) { 2323 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2324 va.va_mode = fxdr_unsigned(u_int16_t, sp->sa_mode); 2325 } 2326 *(pathcp + len2) = '\0'; 2327 if (nd.ni_vp) { 2328 error = EEXIST; 2329 abortop: 2330 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2331 if (nd.ni_dvp == nd.ni_vp) 2332 vrele(nd.ni_dvp); 2333 else 2334 vput(nd.ni_dvp); 2335 if (nd.ni_vp) 2336 vrele(nd.ni_vp); 2337 goto out; 2338 } 2339 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2340 error = VOP_SYMLINK(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va, pathcp); 2341 if (!error) { 2342 if (v3) { 2343 error = nfsrv_composefh(nd.ni_vp, &nsfh, v3); 2344 if (!error) 2345 error = VOP_GETATTR(nd.ni_vp, &va, cred); 2346 vput(nd.ni_vp); 2347 } else { 2348 vput(nd.ni_vp); 2349 } 2350 } 2351 out: 2352 if (pathcp) 2353 free(pathcp, M_TEMP); 2354 if (dirp) { 2355 if (v3) { 2356 vn_lock(dirp, LK_SHARED | LK_RETRY); 2357 diraft_ret = VOP_GETATTR(dirp, &diraft, cred); 2358 VOP_UNLOCK(dirp); 2359 } 2360 vrele(dirp); 2361 dirp = NULL; 2362 } 2363 if (nd.ni_pathbuf != NULL) { 2364 pathbuf_destroy(nd.ni_pathbuf); 2365 nd.ni_pathbuf = NULL; 2366 } 2367 abort = 0; 2368 nfsm_reply(NFSX_SRVFH(&nsfh, v3) + NFSX_POSTOPATTR(v3) + 2369 NFSX_WCCDATA(v3)); 2370 if (v3) { 2371 if (!error) { 2372 nfsm_srvpostop_fh(&nsfh); 2373 nfsm_srvpostop_attr(0, &va); 2374 } 2375 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2376 } 2377 return (0); 2378 nfsmout: 2379 if (abort) { 2380 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2381 if (nd.ni_dvp == nd.ni_vp) 2382 vrele(nd.ni_dvp); 2383 else 2384 vput(nd.ni_dvp); 2385 if (nd.ni_vp) 2386 vrele(nd.ni_vp); 2387 if (nd.ni_pathbuf != NULL) { 2388 pathbuf_destroy(nd.ni_pathbuf); 2389 nd.ni_pathbuf = NULL; 2390 } 2391 } 2392 if (dirp) 2393 vrele(dirp); 2394 if (pathcp) 2395 free(pathcp, M_TEMP); 2396 return (error); 2397 } 2398 2399 /* 2400 * nfs mkdir service 2401 */ 2402 int 2403 nfsrv_mkdir(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 2404 { 2405 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2406 struct mbuf *nam = nfsd->nd_nam; 2407 char *dpos = nfsd->nd_dpos; 2408 kauth_cred_t cred = nfsd->nd_cr; 2409 struct vattr va, dirfor, diraft; 2410 struct nfs_fattr *fp; 2411 struct nameidata nd; 2412 char *cp; 2413 u_int32_t *tl; 2414 int32_t t1; 2415 char *bpos; 2416 int error = 0, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 2417 int abort = 0; 2418 int v3 = (nfsd->nd_flag & ND_NFSV3); 2419 char *cp2; 2420 struct mbuf *mb, *mreq __unused; 2421 struct vnode *vp, *dirp = (struct vnode *)0; 2422 nfsrvfh_t nsfh; 2423 u_quad_t frev; 2424 2425 nfsm_srvmtofh(&nsfh); 2426 nfsm_srvnamesiz(len); 2427 nd.ni_cnd.cn_cred = cred; 2428 nd.ni_cnd.cn_nameiop = CREATE; 2429 nd.ni_cnd.cn_flags = LOCKPARENT; 2430 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 2431 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 2432 if (dirp && v3) { 2433 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); 2434 } 2435 if (error) { 2436 if (nd.ni_pathbuf != NULL) { 2437 pathbuf_destroy(nd.ni_pathbuf); 2438 nd.ni_pathbuf = NULL; 2439 } 2440 nfsm_reply(NFSX_WCCDATA(v3)); 2441 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2442 if (dirp) 2443 vrele(dirp); 2444 return (0); 2445 } 2446 abort = 1; 2447 vattr_null(&va); 2448 if (v3) { 2449 va.va_mode = 0; 2450 nfsm_srvsattr(&va); 2451 } else { 2452 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2453 va.va_mode = nfstov_mode(*tl++); 2454 } 2455 va.va_type = VDIR; 2456 vp = nd.ni_vp; 2457 if (vp != NULL) { 2458 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2459 if (nd.ni_dvp == vp) 2460 vrele(nd.ni_dvp); 2461 else 2462 vput(nd.ni_dvp); 2463 vrele(vp); 2464 error = EEXIST; 2465 goto out; 2466 } 2467 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2468 error = VOP_MKDIR(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 2469 if (!error) { 2470 vp = nd.ni_vp; 2471 error = nfsrv_composefh(vp, &nsfh, v3); 2472 if (!error) 2473 error = VOP_GETATTR(vp, &va, cred); 2474 vput(vp); 2475 } 2476 out: 2477 if (dirp) { 2478 if (v3) { 2479 vn_lock(dirp, LK_SHARED | LK_RETRY); 2480 diraft_ret = VOP_GETATTR(dirp, &diraft, cred); 2481 VOP_UNLOCK(dirp); 2482 } 2483 vrele(dirp); 2484 dirp = NULL; 2485 } 2486 if (nd.ni_pathbuf != NULL) { 2487 pathbuf_destroy(nd.ni_pathbuf); 2488 nd.ni_pathbuf = NULL; 2489 } 2490 abort = 0; 2491 nfsm_reply(NFSX_SRVFH(&nsfh, v3) + NFSX_POSTOPATTR(v3) + 2492 NFSX_WCCDATA(v3)); 2493 if (v3) { 2494 if (!error) { 2495 nfsm_srvpostop_fh(&nsfh); 2496 nfsm_srvpostop_attr(0, &va); 2497 } 2498 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2499 } else { 2500 nfsm_srvfhtom(&nsfh, v3); 2501 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 2502 nfsm_srvfillattr(&va, fp); 2503 } 2504 return (0); 2505 nfsmout: 2506 if (abort) { 2507 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2508 if (nd.ni_dvp == nd.ni_vp) 2509 vrele(nd.ni_dvp); 2510 else 2511 vput(nd.ni_dvp); 2512 if (nd.ni_vp) 2513 vrele(nd.ni_vp); 2514 if (nd.ni_pathbuf != NULL) { 2515 pathbuf_destroy(nd.ni_pathbuf); 2516 nd.ni_pathbuf = NULL; 2517 } 2518 } 2519 if (dirp) 2520 vrele(dirp); 2521 return (error); 2522 } 2523 2524 /* 2525 * nfs rmdir service 2526 */ 2527 int 2528 nfsrv_rmdir(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 2529 { 2530 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2531 struct mbuf *nam = nfsd->nd_nam; 2532 char *dpos = nfsd->nd_dpos; 2533 kauth_cred_t cred = nfsd->nd_cr; 2534 u_int32_t *tl; 2535 int32_t t1; 2536 char *bpos; 2537 int error = 0, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 2538 int v3 = (nfsd->nd_flag & ND_NFSV3); 2539 char *cp2; 2540 struct mbuf *mb, *mreq __unused; 2541 struct vnode *vp, *dirp = (struct vnode *)0; 2542 struct vattr dirfor, diraft; 2543 nfsrvfh_t nsfh; 2544 struct nameidata nd; 2545 u_quad_t frev; 2546 2547 nfsm_srvmtofh(&nsfh); 2548 nfsm_srvnamesiz(len); 2549 nd.ni_cnd.cn_cred = cred; 2550 nd.ni_cnd.cn_nameiop = DELETE; 2551 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 2552 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 2553 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 2554 if (dirp && v3) { 2555 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); 2556 } 2557 if (error) { 2558 if (nd.ni_pathbuf != NULL) { 2559 pathbuf_destroy(nd.ni_pathbuf); 2560 nd.ni_pathbuf = NULL; 2561 } 2562 nfsm_reply(NFSX_WCCDATA(v3)); 2563 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2564 if (dirp) 2565 vrele(dirp); 2566 return (0); 2567 } 2568 vp = nd.ni_vp; 2569 if (vp->v_type != VDIR) { 2570 error = ENOTDIR; 2571 goto out; 2572 } 2573 /* 2574 * No rmdir "." please. 2575 */ 2576 if (nd.ni_dvp == vp) { 2577 error = EINVAL; 2578 goto out; 2579 } 2580 /* 2581 * The root of a mounted filesystem cannot be deleted. 2582 */ 2583 if (vp->v_vflag & VV_ROOT) 2584 error = EBUSY; 2585 out: 2586 if (!error) { 2587 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2588 nqsrv_getl(vp, ND_WRITE); 2589 error = VOP_RMDIR(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); 2590 } else { 2591 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2592 if (nd.ni_dvp == nd.ni_vp) 2593 vrele(nd.ni_dvp); 2594 else 2595 vput(nd.ni_dvp); 2596 vput(vp); 2597 } 2598 if (nd.ni_pathbuf != NULL) { 2599 pathbuf_destroy(nd.ni_pathbuf); 2600 nd.ni_pathbuf = NULL; 2601 } 2602 if (dirp) { 2603 if (v3) { 2604 vn_lock(dirp, LK_SHARED | LK_RETRY); 2605 diraft_ret = VOP_GETATTR(dirp, &diraft, cred); 2606 VOP_UNLOCK(dirp); 2607 } 2608 vrele(dirp); 2609 } 2610 nfsm_reply(NFSX_WCCDATA(v3)); 2611 if (v3) { 2612 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2613 return (0); 2614 } 2615 nfsm_srvdone; 2616 } 2617 2618 /* 2619 * nfs readdir service 2620 * - mallocs what it thinks is enough to read 2621 * count rounded up to a multiple of NFS_SRVDIRBLKSIZ <= NFS_MAXREADDIR 2622 * - calls VOP_READDIR() 2623 * - loops around building the reply 2624 * if the output generated exceeds count break out of loop 2625 * The nfsm_clget macro is used here so that the reply will be packed 2626 * tightly in mbuf clusters. 2627 * - it only knows that it has encountered eof when the VOP_READDIR() 2628 * reads nothing 2629 * - as such one readdir rpc will return eof false although you are there 2630 * and then the next will return eof 2631 * - it trims out records with d_fileno == 0 2632 * this doesn't matter for Unix clients, but they might confuse clients 2633 * for other os'. 2634 * - it trims out records with d_type == DT_WHT 2635 * these cannot be seen through NFS (unless we extend the protocol) 2636 * NB: It is tempting to set eof to true if the VOP_READDIR() reads less 2637 * than requested, but this may not apply to all filesystems. For 2638 * example, client NFS does not { although it is never remote mounted 2639 * anyhow } 2640 * The alternate call nfsrv_readdirplus() does lookups as well. 2641 * PS: The NFS protocol spec. does not clarify what the "count" byte 2642 * argument is a count of.. just name strings and file id's or the 2643 * entire reply rpc or ... 2644 * I tried just file name and id sizes and it confused the Sun client, 2645 * so I am using the full rpc size now. The "paranoia.." comment refers 2646 * to including the status longwords that are not a part of the dir. 2647 * "entry" structures, but are in the rpc. 2648 */ 2649 2650 #define NFS_SRVDIRBLKSIZ 1024 2651 2652 struct flrep { 2653 nfsuint64 fl_off; 2654 u_int32_t fl_postopok; 2655 struct nfs_fattr fl_fattr; /* XXX: must be of fattr3 size */ 2656 u_int32_t fl_fhok; 2657 u_int32_t fl_fhsize; 2658 /* handle comes here, filled in dynamically */ 2659 }; 2660 2661 int 2662 nfsrv_readdir(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 2663 { 2664 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2665 struct mbuf *nam = nfsd->nd_nam; 2666 char *dpos = nfsd->nd_dpos; 2667 kauth_cred_t cred = nfsd->nd_cr; 2668 char *bp, *be; 2669 struct mbuf *mp; 2670 struct dirent *dp; 2671 char *cp; 2672 u_int32_t *tl; 2673 int32_t t1; 2674 char *bpos; 2675 struct mbuf *mb, *mreq __unused, *mp2; 2676 char *cpos, *cend, *cp2, *rbuf; 2677 struct vnode *vp; 2678 struct vattr at; 2679 nfsrvfh_t nsfh; 2680 struct uio io; 2681 struct iovec iv; 2682 int len, nlen, rem, xfer, tsiz, i, error = 0, getret = 1; 2683 int siz, cnt, fullsiz, eofflag, rdonly, cache = 0, ncookies; 2684 int v3 = (nfsd->nd_flag & ND_NFSV3); 2685 u_quad_t frev, off, toff; 2686 #ifdef NFS3_STRICTVERF 2687 u_quad_t verf; 2688 #endif 2689 off_t *cookies = NULL, *cookiep; 2690 nfsuint64 jar; 2691 2692 nfsm_srvmtofh(&nsfh); 2693 if (v3) { 2694 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 2695 toff = fxdr_hyper(tl); 2696 tl += 2; 2697 #ifdef NFS3_STRICTVERF 2698 verf = fxdr_hyper(tl); 2699 #endif 2700 tl += 2; 2701 } else { 2702 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2703 toff = fxdr_unsigned(u_quad_t, *tl++); 2704 } 2705 off = toff; 2706 cnt = fxdr_unsigned(int, *tl); 2707 siz = ((cnt + NFS_SRVDIRBLKSIZ - 1) & ~(NFS_SRVDIRBLKSIZ - 1)); 2708 xfer = NFS_SRVMAXDATA(nfsd); 2709 if (siz > xfer) 2710 siz = xfer; 2711 fullsiz = siz; 2712 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 2713 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 2714 if (!error && vp->v_type != VDIR) { 2715 error = ENOTDIR; 2716 vput(vp); 2717 } 2718 if (error) { 2719 nfsm_reply(NFSX_UNSIGNED); 2720 nfsm_srvpostop_attr(getret, &at); 2721 return (0); 2722 } 2723 nqsrv_getl(vp, ND_READ); 2724 if (v3) { 2725 error = getret = VOP_GETATTR(vp, &at, cred); 2726 #ifdef NFS3_STRICTVERF 2727 /* 2728 * XXX This check is too strict for Solaris 2.5 clients. 2729 */ 2730 if (!error && toff && verf != at.va_filerev) 2731 error = NFSERR_BAD_COOKIE; 2732 #endif 2733 } 2734 if (!error) 2735 error = nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 0); 2736 if (error) { 2737 vput(vp); 2738 nfsm_reply(NFSX_POSTOPATTR(v3)); 2739 nfsm_srvpostop_attr(getret, &at); 2740 return (0); 2741 } 2742 VOP_UNLOCK(vp); 2743 rbuf = malloc(siz, M_TEMP, M_WAITOK); 2744 again: 2745 iv.iov_base = rbuf; 2746 iv.iov_len = fullsiz; 2747 io.uio_iov = &iv; 2748 io.uio_iovcnt = 1; 2749 io.uio_offset = (off_t)off; 2750 io.uio_resid = fullsiz; 2751 io.uio_rw = UIO_READ; 2752 UIO_SETUP_SYSSPACE(&io); 2753 eofflag = 0; 2754 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2755 2756 error = VOP_READDIR(vp, &io, cred, &eofflag, &cookies, &ncookies); 2757 2758 off = (off_t)io.uio_offset; 2759 if (!cookies && !error) 2760 error = NFSERR_PERM; 2761 if (v3) { 2762 getret = VOP_GETATTR(vp, &at, cred); 2763 if (!error) 2764 error = getret; 2765 } 2766 2767 VOP_UNLOCK(vp); 2768 if (error) { 2769 vrele(vp); 2770 free((void *)rbuf, M_TEMP); 2771 if (cookies) 2772 free((void *)cookies, M_TEMP); 2773 nfsm_reply(NFSX_POSTOPATTR(v3)); 2774 nfsm_srvpostop_attr(getret, &at); 2775 return (0); 2776 } 2777 if (io.uio_resid) { 2778 siz -= io.uio_resid; 2779 2780 /* 2781 * If nothing read, return eof 2782 * rpc reply 2783 */ 2784 if (siz == 0) { 2785 vrele(vp); 2786 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_COOKIEVERF(v3) + 2787 2 * NFSX_UNSIGNED); 2788 if (v3) { 2789 nfsm_srvpostop_attr(getret, &at); 2790 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 2791 txdr_hyper(at.va_filerev, tl); 2792 tl += 2; 2793 } else 2794 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2795 *tl++ = nfs_false; 2796 *tl = nfs_true; 2797 free((void *)rbuf, M_TEMP); 2798 free((void *)cookies, M_TEMP); 2799 return (0); 2800 } 2801 } 2802 2803 /* 2804 * Check for degenerate cases of nothing useful read. 2805 * If so go try again 2806 */ 2807 cpos = rbuf; 2808 cend = rbuf + siz; 2809 dp = (struct dirent *)cpos; 2810 cookiep = cookies; 2811 2812 while (cpos < cend && ncookies > 0 && 2813 (dp->d_fileno == 0 || dp->d_type == DT_WHT)) { 2814 cpos += dp->d_reclen; 2815 dp = (struct dirent *)cpos; 2816 cookiep++; 2817 ncookies--; 2818 } 2819 if (cpos >= cend || ncookies == 0) { 2820 toff = off; 2821 siz = fullsiz; 2822 free(cookies, M_TEMP); 2823 cookies = NULL; 2824 goto again; 2825 } 2826 2827 len = 3 * NFSX_UNSIGNED; /* paranoia, probably can be 0 */ 2828 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_COOKIEVERF(v3) + siz); 2829 if (v3) { 2830 nfsm_srvpostop_attr(getret, &at); 2831 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2832 txdr_hyper(at.va_filerev, tl); 2833 } 2834 mp = mp2 = mb; 2835 bp = bpos; 2836 be = bp + M_TRAILINGSPACE(mp); 2837 2838 /* Loop through the records and build reply */ 2839 while (cpos < cend && ncookies > 0) { 2840 if (dp->d_fileno != 0 && dp->d_type != DT_WHT) { 2841 nlen = dp->d_namlen; 2842 rem = nfsm_rndup(nlen)-nlen; 2843 len += (4 * NFSX_UNSIGNED + nlen + rem); 2844 if (v3) 2845 len += 2 * NFSX_UNSIGNED; 2846 if (len > cnt) { 2847 eofflag = 0; 2848 break; 2849 } 2850 /* 2851 * Build the directory record xdr from 2852 * the dirent entry. 2853 */ 2854 nfsm_clget; 2855 *tl = nfs_true; 2856 bp += NFSX_UNSIGNED; 2857 if (v3) { 2858 nfsm_clget; 2859 *tl = txdr_unsigned(dp->d_fileno >> 32); 2860 bp += NFSX_UNSIGNED; 2861 } 2862 nfsm_clget; 2863 *tl = txdr_unsigned(dp->d_fileno); 2864 bp += NFSX_UNSIGNED; 2865 nfsm_clget; 2866 *tl = txdr_unsigned(nlen); 2867 bp += NFSX_UNSIGNED; 2868 2869 /* And loop around copying the name */ 2870 xfer = nlen; 2871 cp = dp->d_name; 2872 while (xfer > 0) { 2873 nfsm_clget; 2874 if ((bp+xfer) > be) 2875 tsiz = be-bp; 2876 else 2877 tsiz = xfer; 2878 memcpy(bp, cp, tsiz); 2879 bp += tsiz; 2880 xfer -= tsiz; 2881 if (xfer > 0) 2882 cp += tsiz; 2883 } 2884 /* And null pad to an int32_t boundary */ 2885 for (i = 0; i < rem; i++) 2886 *bp++ = '\0'; 2887 nfsm_clget; 2888 2889 /* Finish off the record */ 2890 txdr_hyper(*cookiep, &jar); 2891 if (v3) { 2892 *tl = jar.nfsuquad[0]; 2893 bp += NFSX_UNSIGNED; 2894 nfsm_clget; 2895 } 2896 *tl = jar.nfsuquad[1]; 2897 bp += NFSX_UNSIGNED; 2898 } 2899 cpos += dp->d_reclen; 2900 dp = (struct dirent *)cpos; 2901 cookiep++; 2902 ncookies--; 2903 } 2904 vrele(vp); 2905 nfsm_clget; 2906 *tl = nfs_false; 2907 bp += NFSX_UNSIGNED; 2908 nfsm_clget; 2909 if (eofflag) 2910 *tl = nfs_true; 2911 else 2912 *tl = nfs_false; 2913 bp += NFSX_UNSIGNED; 2914 if (mp != mb) { 2915 if (bp < be) 2916 mp->m_len = bp - mtod(mp, char *); 2917 } else 2918 mp->m_len += bp - bpos; 2919 free((void *)rbuf, M_TEMP); 2920 free((void *)cookies, M_TEMP); 2921 nfsm_srvdone; 2922 } 2923 2924 int 2925 nfsrv_readdirplus(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 2926 { 2927 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2928 struct mbuf *nam = nfsd->nd_nam; 2929 char *dpos = nfsd->nd_dpos; 2930 kauth_cred_t cred = nfsd->nd_cr; 2931 char *bp, *be; 2932 struct mbuf *mp; 2933 struct dirent *dp; 2934 char *cp; 2935 u_int32_t *tl; 2936 int32_t t1; 2937 char *bpos; 2938 struct mbuf *mb, *mreq __unused, *mp2; 2939 char *cpos, *cend, *cp2, *rbuf; 2940 struct vnode *vp, *nvp; 2941 struct flrep fl; 2942 nfsrvfh_t nsfh; 2943 struct uio io; 2944 struct iovec iv; 2945 struct vattr va, at, *vap = &va; 2946 struct nfs_fattr *fp; 2947 int len, nlen, rem, xfer, tsiz, i, error = 0, getret = 1; 2948 int siz, cnt, fullsiz, eofflag, rdonly, cache = 0, dirlen, ncookies; 2949 u_quad_t frev, off, toff; 2950 #ifdef NFS3_STRICTVERF 2951 u_quad_t verf; 2952 #endif 2953 off_t *cookies = NULL, *cookiep; 2954 2955 nfsm_srvmtofh(&nsfh); 2956 nfsm_dissect(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 2957 toff = fxdr_hyper(tl); 2958 tl += 2; 2959 #ifdef NFS3_STRICTVERF 2960 verf = fxdr_hyper(tl); 2961 #endif 2962 tl += 2; 2963 siz = fxdr_unsigned(int, *tl++); 2964 cnt = fxdr_unsigned(int, *tl); 2965 off = toff; 2966 siz = ((siz + NFS_SRVDIRBLKSIZ - 1) & ~(NFS_SRVDIRBLKSIZ - 1)); 2967 xfer = NFS_SRVMAXDATA(nfsd); 2968 if (siz > xfer) 2969 siz = xfer; 2970 fullsiz = siz; 2971 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 2972 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 2973 if (!error && vp->v_type != VDIR) { 2974 error = ENOTDIR; 2975 vput(vp); 2976 } 2977 if (error) { 2978 nfsm_reply(NFSX_UNSIGNED); 2979 nfsm_srvpostop_attr(getret, &at); 2980 return (0); 2981 } 2982 error = getret = VOP_GETATTR(vp, &at, cred); 2983 #ifdef NFS3_STRICTVERF 2984 /* 2985 * XXX This check is too strict for Solaris 2.5 clients. 2986 */ 2987 if (!error && toff && verf != at.va_filerev) 2988 error = NFSERR_BAD_COOKIE; 2989 #endif 2990 if (!error) { 2991 nqsrv_getl(vp, ND_READ); 2992 error = nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 0); 2993 } 2994 if (error) { 2995 vput(vp); 2996 nfsm_reply(NFSX_V3POSTOPATTR); 2997 nfsm_srvpostop_attr(getret, &at); 2998 return (0); 2999 } 3000 VOP_UNLOCK(vp); 3001 3002 rbuf = malloc(siz, M_TEMP, M_WAITOK); 3003 again: 3004 iv.iov_base = rbuf; 3005 iv.iov_len = fullsiz; 3006 io.uio_iov = &iv; 3007 io.uio_iovcnt = 1; 3008 io.uio_offset = (off_t)off; 3009 io.uio_resid = fullsiz; 3010 io.uio_rw = UIO_READ; 3011 UIO_SETUP_SYSSPACE(&io); 3012 eofflag = 0; 3013 3014 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 3015 3016 error = VOP_READDIR(vp, &io, cred, &eofflag, &cookies, &ncookies); 3017 3018 off = (u_quad_t)io.uio_offset; 3019 getret = VOP_GETATTR(vp, &at, cred); 3020 3021 VOP_UNLOCK(vp); 3022 3023 /* 3024 * If the VGET operation doesn't work for this filesystem, 3025 * we can't support readdirplus. Returning NOTSUPP should 3026 * make clients fall back to plain readdir. 3027 * There's no need to check for VPTOFH as well, we wouldn't 3028 * even be here otherwise. 3029 */ 3030 if (!getret) { 3031 if ((getret = VFS_VGET(vp->v_mount, at.va_fileid, &nvp))) 3032 getret = (getret == EOPNOTSUPP) ? 3033 NFSERR_NOTSUPP : NFSERR_IO; 3034 else 3035 vput(nvp); 3036 } 3037 3038 if (!cookies && !error) 3039 error = NFSERR_PERM; 3040 if (!error) 3041 error = getret; 3042 if (error) { 3043 vrele(vp); 3044 if (cookies) 3045 free((void *)cookies, M_TEMP); 3046 free((void *)rbuf, M_TEMP); 3047 nfsm_reply(NFSX_V3POSTOPATTR); 3048 nfsm_srvpostop_attr(getret, &at); 3049 return (0); 3050 } 3051 if (io.uio_resid) { 3052 siz -= io.uio_resid; 3053 3054 /* 3055 * If nothing read, return eof 3056 * rpc reply 3057 */ 3058 if (siz == 0) { 3059 vrele(vp); 3060 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF + 3061 2 * NFSX_UNSIGNED); 3062 nfsm_srvpostop_attr(getret, &at); 3063 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 3064 txdr_hyper(at.va_filerev, tl); 3065 tl += 2; 3066 *tl++ = nfs_false; 3067 *tl = nfs_true; 3068 free((void *)cookies, M_TEMP); 3069 free((void *)rbuf, M_TEMP); 3070 return (0); 3071 } 3072 } 3073 3074 /* 3075 * Check for degenerate cases of nothing useful read. 3076 * If so go try again 3077 */ 3078 cpos = rbuf; 3079 cend = rbuf + siz; 3080 dp = (struct dirent *)cpos; 3081 cookiep = cookies; 3082 3083 while (cpos < cend && ncookies > 0 && 3084 (dp->d_fileno == 0 || dp->d_type == DT_WHT)) { 3085 cpos += dp->d_reclen; 3086 dp = (struct dirent *)cpos; 3087 cookiep++; 3088 ncookies--; 3089 } 3090 if (cpos >= cend || ncookies == 0) { 3091 toff = off; 3092 siz = fullsiz; 3093 free(cookies, M_TEMP); 3094 cookies = NULL; 3095 goto again; 3096 } 3097 3098 dirlen = len = NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF + 2 * NFSX_UNSIGNED; 3099 nfsm_reply(cnt); 3100 nfsm_srvpostop_attr(getret, &at); 3101 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 3102 txdr_hyper(at.va_filerev, tl); 3103 mp = mp2 = mb; 3104 bp = bpos; 3105 be = bp + M_TRAILINGSPACE(mp); 3106 3107 /* Loop through the records and build reply */ 3108 while (cpos < cend && ncookies > 0) { 3109 if (dp->d_fileno != 0 && dp->d_type != DT_WHT) { 3110 nfsrvfh_t nnsfh; 3111 3112 nlen = dp->d_namlen; 3113 rem = nfsm_rndup(nlen)-nlen; 3114 3115 /* 3116 * For readdir_and_lookup get the vnode using 3117 * the file number. 3118 */ 3119 if (VFS_VGET(vp->v_mount, dp->d_fileno, &nvp)) 3120 goto invalid; 3121 if (nfsrv_composefh(nvp, &nnsfh, true)) { 3122 vput(nvp); 3123 goto invalid; 3124 } 3125 if (VOP_GETATTR(nvp, vap, cred)) { 3126 vput(nvp); 3127 goto invalid; 3128 } 3129 vput(nvp); 3130 3131 /* 3132 * If either the dircount or maxcount will be 3133 * exceeded, get out now. Both of these lengths 3134 * are calculated conservatively, including all 3135 * XDR overheads. 3136 */ 3137 len += (8 * NFSX_UNSIGNED + nlen + rem + NFSX_V3FH + 3138 NFSX_V3POSTOPATTR); 3139 dirlen += (6 * NFSX_UNSIGNED + nlen + rem); 3140 if (len > cnt || dirlen > fullsiz) { 3141 eofflag = 0; 3142 break; 3143 } 3144 3145 /* 3146 * Build the directory record xdr from 3147 * the dirent entry. 3148 */ 3149 fp = (struct nfs_fattr *)&fl.fl_fattr; 3150 nfsm_srvfillattr(vap, fp); 3151 fl.fl_fhsize = txdr_unsigned(NFSX_V3FH); 3152 fl.fl_fhok = nfs_true; 3153 fl.fl_postopok = nfs_true; 3154 txdr_hyper(*cookiep, fl.fl_off.nfsuquad); 3155 3156 nfsm_clget; 3157 *tl = nfs_true; 3158 bp += NFSX_UNSIGNED; 3159 nfsm_clget; 3160 *tl = txdr_unsigned(dp->d_fileno >> 32); 3161 bp += NFSX_UNSIGNED; 3162 nfsm_clget; 3163 *tl = txdr_unsigned(dp->d_fileno); 3164 bp += NFSX_UNSIGNED; 3165 nfsm_clget; 3166 *tl = txdr_unsigned(nlen); 3167 bp += NFSX_UNSIGNED; 3168 3169 /* And loop around copying the name */ 3170 xfer = nlen; 3171 cp = dp->d_name; 3172 while (xfer > 0) { 3173 nfsm_clget; 3174 if ((bp + xfer) > be) 3175 tsiz = be - bp; 3176 else 3177 tsiz = xfer; 3178 memcpy(bp, cp, tsiz); 3179 bp += tsiz; 3180 xfer -= tsiz; 3181 if (xfer > 0) 3182 cp += tsiz; 3183 } 3184 /* And null pad to an int32_t boundary */ 3185 for (i = 0; i < rem; i++) 3186 *bp++ = '\0'; 3187 3188 /* 3189 * Now copy the flrep structure out. 3190 */ 3191 xfer = sizeof(struct flrep); 3192 cp = (void *)&fl; 3193 while (xfer > 0) { 3194 nfsm_clget; 3195 if ((bp + xfer) > be) 3196 tsiz = be - bp; 3197 else 3198 tsiz = xfer; 3199 memcpy(bp, cp, tsiz); 3200 bp += tsiz; 3201 xfer -= tsiz; 3202 if (xfer > 0) 3203 cp += tsiz; 3204 } 3205 3206 /* 3207 * ... and filehandle. 3208 */ 3209 xfer = NFSRVFH_SIZE(&nnsfh); 3210 cp = NFSRVFH_DATA(&nnsfh); 3211 while (xfer > 0) { 3212 nfsm_clget; 3213 if ((bp + xfer) > be) 3214 tsiz = be - bp; 3215 else 3216 tsiz = xfer; 3217 memcpy(bp, cp, tsiz); 3218 bp += tsiz; 3219 xfer -= tsiz; 3220 if (xfer > 0) 3221 cp += tsiz; 3222 } 3223 } 3224 invalid: 3225 cpos += dp->d_reclen; 3226 dp = (struct dirent *)cpos; 3227 cookiep++; 3228 ncookies--; 3229 } 3230 vrele(vp); 3231 nfsm_clget; 3232 *tl = nfs_false; 3233 bp += NFSX_UNSIGNED; 3234 nfsm_clget; 3235 if (eofflag) 3236 *tl = nfs_true; 3237 else 3238 *tl = nfs_false; 3239 bp += NFSX_UNSIGNED; 3240 if (mp != mb) { 3241 if (bp < be) 3242 mp->m_len = bp - mtod(mp, char *); 3243 } else 3244 mp->m_len += bp - bpos; 3245 free((void *)cookies, M_TEMP); 3246 free((void *)rbuf, M_TEMP); 3247 nfsm_srvdone; 3248 } 3249 3250 /* 3251 * nfs commit service 3252 */ 3253 int 3254 nfsrv_commit(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 3255 { 3256 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3257 struct mbuf *nam = nfsd->nd_nam; 3258 char *dpos = nfsd->nd_dpos; 3259 kauth_cred_t cred = nfsd->nd_cr; 3260 struct vattr bfor, aft; 3261 struct vnode *vp; 3262 nfsrvfh_t nsfh; 3263 u_int32_t *tl; 3264 int32_t t1; 3265 char *bpos; 3266 int error = 0, rdonly, for_ret = 1, aft_ret = 1, cache = 0; 3267 uint32_t cnt; 3268 char *cp2; 3269 struct mbuf *mb, *mreq __unused; 3270 u_quad_t frev, off, end; 3271 3272 nfsm_srvmtofh(&nsfh); 3273 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 3274 3275 off = fxdr_hyper(tl); 3276 tl += 2; 3277 cnt = fxdr_unsigned(uint32_t, *tl); 3278 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 3279 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 3280 if (error) { 3281 nfsm_reply(2 * NFSX_UNSIGNED); 3282 nfsm_srvwcc_data(for_ret, &bfor, aft_ret, &aft); 3283 return (0); 3284 } 3285 for_ret = VOP_GETATTR(vp, &bfor, cred); 3286 end = (cnt > 0) ? off + cnt : vp->v_size; 3287 if (end < off || end > vp->v_size) 3288 end = vp->v_size; 3289 if (off < vp->v_size) 3290 error = VOP_FSYNC(vp, cred, FSYNC_WAIT, off, end); 3291 /* else error == 0, from nfsrv_fhtovp() */ 3292 aft_ret = VOP_GETATTR(vp, &aft, cred); 3293 vput(vp); 3294 nfsm_reply(NFSX_V3WCCDATA + NFSX_V3WRITEVERF); 3295 nfsm_srvwcc_data(for_ret, &bfor, aft_ret, &aft); 3296 if (!error) { 3297 nfsm_build(tl, u_int32_t *, NFSX_V3WRITEVERF); 3298 *tl++ = txdr_unsigned(boottime.tv_sec); 3299 *tl = txdr_unsigned(boottime.tv_nsec / 1000); 3300 } else { 3301 return (0); 3302 } 3303 nfsm_srvdone; 3304 } 3305 3306 /* 3307 * nfs statfs service 3308 */ 3309 int 3310 nfsrv_statfs(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 3311 { 3312 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3313 struct mbuf *nam = nfsd->nd_nam; 3314 char *dpos = nfsd->nd_dpos; 3315 kauth_cred_t cred = nfsd->nd_cr; 3316 struct statvfs *sf = NULL; 3317 struct nfs_statfs *sfp; 3318 u_int32_t *tl; 3319 int32_t t1; 3320 char *bpos; 3321 int error = 0, rdonly, cache = 0, getret = 1; 3322 int v3 = (nfsd->nd_flag & ND_NFSV3); 3323 char *cp2; 3324 struct mbuf *mb, *mreq __unused; 3325 struct vnode *vp; 3326 struct vattr at; 3327 nfsrvfh_t nsfh; 3328 u_quad_t frev, tval; 3329 3330 nfsm_srvmtofh(&nsfh); 3331 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 3332 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 3333 if (error) { 3334 nfsm_reply(NFSX_UNSIGNED); 3335 nfsm_srvpostop_attr(getret, &at); 3336 return (0); 3337 } 3338 sf = malloc(sizeof(*sf), M_TEMP, M_WAITOK); 3339 error = VFS_STATVFS(vp->v_mount, sf); 3340 getret = VOP_GETATTR(vp, &at, cred); 3341 vput(vp); 3342 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_STATFS(v3)); 3343 if (v3) 3344 nfsm_srvpostop_attr(getret, &at); 3345 if (error) { 3346 free(sf, M_TEMP); 3347 return (0); 3348 } 3349 nfsm_build(sfp, struct nfs_statfs *, NFSX_STATFS(v3)); 3350 if (v3) { 3351 tval = (u_quad_t)((quad_t)sf->f_blocks * (quad_t)sf->f_frsize); 3352 txdr_hyper(tval, &sfp->sf_tbytes); 3353 tval = (u_quad_t)((quad_t)sf->f_bfree * (quad_t)sf->f_frsize); 3354 txdr_hyper(tval, &sfp->sf_fbytes); 3355 tval = (u_quad_t)((quad_t)sf->f_bavail * (quad_t)sf->f_frsize); 3356 txdr_hyper(tval, &sfp->sf_abytes); 3357 tval = (u_quad_t)sf->f_files; 3358 txdr_hyper(tval, &sfp->sf_tfiles); 3359 tval = (u_quad_t)sf->f_ffree; 3360 txdr_hyper(tval, &sfp->sf_ffiles); 3361 txdr_hyper(tval, &sfp->sf_afiles); 3362 sfp->sf_invarsec = 0; 3363 } else { 3364 sfp->sf_tsize = txdr_unsigned(NFS_MAXDGRAMDATA); 3365 sfp->sf_bsize = txdr_unsigned(sf->f_frsize); 3366 sfp->sf_blocks = txdr_unsigned(sf->f_blocks); 3367 sfp->sf_bfree = txdr_unsigned(sf->f_bfree); 3368 sfp->sf_bavail = txdr_unsigned(sf->f_bavail); 3369 } 3370 nfsmout: 3371 if (sf) 3372 free(sf, M_TEMP); 3373 return error; 3374 } 3375 3376 /* 3377 * nfs fsinfo service 3378 */ 3379 int 3380 nfsrv_fsinfo(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 3381 { 3382 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3383 struct mbuf *nam = nfsd->nd_nam; 3384 char *dpos = nfsd->nd_dpos; 3385 kauth_cred_t cred = nfsd->nd_cr; 3386 u_int32_t *tl; 3387 struct nfsv3_fsinfo *sip; 3388 int32_t t1; 3389 char *bpos; 3390 int error = 0, rdonly, cache = 0, getret = 1; 3391 uint32_t maxdata; 3392 char *cp2; 3393 struct mbuf *mb, *mreq __unused; 3394 struct vnode *vp; 3395 struct vattr at; 3396 nfsrvfh_t nsfh; 3397 u_quad_t frev, maxfsize; 3398 struct statvfs *sb; 3399 3400 nfsm_srvmtofh(&nsfh); 3401 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 3402 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 3403 if (error) { 3404 nfsm_reply(NFSX_UNSIGNED); 3405 nfsm_srvpostop_attr(getret, &at); 3406 return (0); 3407 } 3408 3409 /* XXX Try to make a guess on the max file size. */ 3410 sb = malloc(sizeof(*sb), M_TEMP, M_WAITOK); 3411 VFS_STATVFS(vp->v_mount, sb); 3412 maxfsize = (u_quad_t)0x80000000 * sb->f_frsize - 1; 3413 free(sb, M_TEMP); 3414 3415 getret = VOP_GETATTR(vp, &at, cred); 3416 vput(vp); 3417 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3FSINFO); 3418 nfsm_srvpostop_attr(getret, &at); 3419 nfsm_build(sip, struct nfsv3_fsinfo *, NFSX_V3FSINFO); 3420 3421 /* 3422 * XXX 3423 * There should be file system VFS OP(s) to get this information. 3424 * For now, assume ufs. 3425 */ 3426 if (slp->ns_so->so_type == SOCK_DGRAM) 3427 maxdata = NFS_MAXDGRAMDATA; 3428 else 3429 maxdata = NFS_MAXDATA; 3430 sip->fs_rtmax = txdr_unsigned(maxdata); 3431 sip->fs_rtpref = txdr_unsigned(maxdata); 3432 sip->fs_rtmult = txdr_unsigned(NFS_FABLKSIZE); 3433 sip->fs_wtmax = txdr_unsigned(maxdata); 3434 sip->fs_wtpref = txdr_unsigned(maxdata); 3435 sip->fs_wtmult = txdr_unsigned(NFS_FABLKSIZE); 3436 sip->fs_dtpref = txdr_unsigned(maxdata); 3437 txdr_hyper(maxfsize, &sip->fs_maxfilesize); 3438 sip->fs_timedelta.nfsv3_sec = 0; 3439 sip->fs_timedelta.nfsv3_nsec = txdr_unsigned(1); 3440 sip->fs_properties = txdr_unsigned(NFSV3FSINFO_LINK | 3441 NFSV3FSINFO_SYMLINK | NFSV3FSINFO_HOMOGENEOUS | 3442 NFSV3FSINFO_CANSETTIME); 3443 nfsm_srvdone; 3444 } 3445 3446 /* 3447 * nfs pathconf service 3448 */ 3449 int 3450 nfsrv_pathconf(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 3451 { 3452 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3453 struct mbuf *nam = nfsd->nd_nam; 3454 char *dpos = nfsd->nd_dpos; 3455 kauth_cred_t cred = nfsd->nd_cr; 3456 u_int32_t *tl; 3457 struct nfsv3_pathconf *pc; 3458 int32_t t1; 3459 char *bpos; 3460 int error = 0, rdonly, cache = 0, getret = 1; 3461 register_t linkmax, namemax, chownres, notrunc; 3462 char *cp2; 3463 struct mbuf *mb, *mreq __unused; 3464 struct vnode *vp; 3465 struct vattr at; 3466 nfsrvfh_t nsfh; 3467 u_quad_t frev; 3468 3469 nfsm_srvmtofh(&nsfh); 3470 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 3471 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 3472 if (error) { 3473 nfsm_reply(NFSX_UNSIGNED); 3474 nfsm_srvpostop_attr(getret, &at); 3475 return (0); 3476 } 3477 error = VOP_PATHCONF(vp, _PC_LINK_MAX, &linkmax); 3478 if (!error) 3479 error = VOP_PATHCONF(vp, _PC_NAME_MAX, &namemax); 3480 if (!error) 3481 error = VOP_PATHCONF(vp, _PC_CHOWN_RESTRICTED, &chownres); 3482 if (!error) 3483 error = VOP_PATHCONF(vp, _PC_NO_TRUNC, ¬runc); 3484 getret = VOP_GETATTR(vp, &at, cred); 3485 vput(vp); 3486 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3PATHCONF); 3487 nfsm_srvpostop_attr(getret, &at); 3488 if (error) 3489 return (0); 3490 nfsm_build(pc, struct nfsv3_pathconf *, NFSX_V3PATHCONF); 3491 3492 pc->pc_linkmax = txdr_unsigned(linkmax); 3493 pc->pc_namemax = txdr_unsigned(namemax); 3494 pc->pc_notrunc = txdr_unsigned(notrunc); 3495 pc->pc_chownrestricted = txdr_unsigned(chownres); 3496 3497 /* 3498 * These should probably be supported by VOP_PATHCONF(), but 3499 * until msdosfs is exportable (why would you want to?), the 3500 * Unix defaults should be ok. 3501 */ 3502 pc->pc_caseinsensitive = nfs_false; 3503 pc->pc_casepreserving = nfs_true; 3504 nfsm_srvdone; 3505 } 3506 3507 /* 3508 * Null operation, used by clients to ping server 3509 */ 3510 /* ARGSUSED */ 3511 int 3512 nfsrv_null(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, 3513 struct lwp *lwp, struct mbuf **mrq) 3514 { 3515 struct mbuf *mrep = nfsd->nd_mrep; 3516 char *bpos; 3517 int error = NFSERR_RETVOID, cache = 0; 3518 struct mbuf *mb, *mreq __unused; 3519 u_quad_t frev; 3520 3521 nfsm_reply(0); 3522 nfsmout: 3523 return (0); 3524 } 3525 3526 /* 3527 * No operation, used for obsolete procedures 3528 */ 3529 /* ARGSUSED */ 3530 int 3531 nfsrv_noop(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, 3532 struct lwp *lwp, struct mbuf **mrq) 3533 { 3534 struct mbuf *mrep = nfsd->nd_mrep; 3535 char *bpos; 3536 int error, cache = 0; 3537 struct mbuf *mb, *mreq __unused; 3538 u_quad_t frev; 3539 3540 if (nfsd->nd_repstat) 3541 error = nfsd->nd_repstat; 3542 else 3543 error = EPROCUNAVAIL; 3544 nfsm_reply(0); 3545 nfsmout: 3546 return (0); 3547 } 3548 3549 /* 3550 * Perform access checking for vnodes obtained from file handles that would 3551 * refer to files already opened by a Unix client. You cannot just use 3552 * vn_writechk() and VOP_ACCESS() for two reasons. 3553 * 1 - You must check for exported rdonly as well as MNT_RDONLY for the write case 3554 * 2 - The owner is to be given access irrespective of mode bits for some 3555 * operations, so that processes that chmod after opening a file don't 3556 * break. I don't like this because it opens a security hole, but since 3557 * the nfs server opens a security hole the size of a barn door anyhow, 3558 * what the heck. 3559 * 3560 * The exception to rule 2 is EPERM. If a file is IMMUTABLE, VOP_ACCESS() 3561 * will return EPERM instead of EACCES. EPERM is always an error. 3562 */ 3563 int 3564 nfsrv_access(struct vnode *vp, int flags, kauth_cred_t cred, int rdonly, struct lwp *lwp, int override) 3565 { 3566 struct vattr vattr; 3567 int error; 3568 if (flags & VWRITE) { 3569 /* Just vn_writechk() changed to check rdonly */ 3570 /* 3571 * Disallow write attempts on read-only file systems; 3572 * unless the file is a socket or a block or character 3573 * device resident on the file system. 3574 */ 3575 if (rdonly || (vp->v_mount->mnt_flag & MNT_RDONLY)) { 3576 switch (vp->v_type) { 3577 case VREG: 3578 case VDIR: 3579 case VLNK: 3580 return (EROFS); 3581 default: 3582 break; 3583 } 3584 } 3585 3586 /* 3587 * If the vnode is in use as a process's text, 3588 * we can't allow writing. 3589 */ 3590 if (vp->v_iflag & VI_TEXT) 3591 return (ETXTBSY); 3592 } 3593 error = VOP_GETATTR(vp, &vattr, cred); 3594 if (error) 3595 return (error); 3596 error = VOP_ACCESS(vp, flags, cred); 3597 /* 3598 * Allow certain operations for the owner (reads and writes 3599 * on files that are already open). 3600 */ 3601 if (override && error == EACCES && kauth_cred_geteuid(cred) == vattr.va_uid) 3602 error = 0; 3603 return error; 3604 } 3605
Indexes created Thu Oct 02 14:10:14 GMT 2025