nfs_serv.c revision 1.176
1 /* $NetBSD: nfs_serv.c,v 1.176 2019/02/03 03:19:28 mrg 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 1.176 2019/02/03 03:19:28 mrg Exp $"); 59 60 #include <sys/param.h> 61 #include <sys/systm.h> 62 #include <sys/proc.h> 63 #include <sys/file.h> 64 #include <sys/namei.h> 65 #include <sys/vnode.h> 66 #include <sys/mount.h> 67 #include <sys/socket.h> 68 #include <sys/socketvar.h> 69 #include <sys/mbuf.h> 70 #include <sys/dirent.h> 71 #include <sys/stat.h> 72 #include <sys/kernel.h> 73 #include <sys/hash.h> 74 #include <sys/kauth.h> 75 #include <sys/module.h> 76 #include <sys/syscall.h> 77 #include <sys/syscallargs.h> 78 #include <sys/syscallvar.h> 79 80 #include <uvm/uvm.h> 81 82 #include <nfs/nfsproto.h> 83 #include <nfs/rpcv2.h> 84 #include <nfs/nfs.h> 85 #include <nfs/xdr_subs.h> 86 #include <nfs/nfsm_subs.h> 87 #include <nfs/nfs_var.h> 88 89 MODULE(MODULE_CLASS_MISC, nfsserver, "nfs"); 90 91 /* Global vars */ 92 extern u_int32_t nfs_xdrneg1; 93 extern u_int32_t nfs_false, nfs_true; 94 extern const enum vtype nv3tov_type[8]; 95 extern struct nfsstats nfsstats; 96 extern const nfstype nfsv2_type[9]; 97 extern const nfstype nfsv3_type[9]; 98 int nfsrvw_procrastinate = NFS_GATHERDELAY * 1000; 99 bool nfsd_use_loan = true; /* use page-loan for READ OP */ 100 101 #define nqsrv_getl(vp, rw) /* nothing */ 102 103 static const struct syscall_package nfsserver_syscalls[] = { 104 { SYS_nfssvc, 0, (sy_call_t *)sys_nfssvc }, 105 { 0, 0, NULL }, 106 }; 107 108 static int 109 nfsserver_modcmd(modcmd_t cmd, void *arg) 110 { 111 extern struct vfs_hooks nfs_export_hooks; /* XXX */ 112 int error; 113 114 switch (cmd) { 115 case MODULE_CMD_INIT: 116 error = syscall_establish(NULL, nfsserver_syscalls); 117 if (error != 0) { 118 return error; 119 } 120 nfs_init(); /* XXX for monolithic kernel */ 121 netexport_init(); 122 nfsrv_initcache(); /* Init the server request cache */ 123 nfsrv_init(0); /* Init server data structures */ 124 vfs_hooks_attach(&nfs_export_hooks); 125 nfs_timer_srvinit(nfsrv_timer); 126 return 0; 127 case MODULE_CMD_FINI: 128 error = syscall_disestablish(NULL, nfsserver_syscalls); 129 if (error != 0) { 130 return error; 131 } 132 /* 133 * Kill export list before detaching VFS hooks, so we 134 * we don't leak state due to a concurrent umount(). 135 */ 136 netexport_fini(); 137 vfs_hooks_detach(&nfs_export_hooks); 138 139 /* Kill timer before server goes away. */ 140 nfs_timer_srvfini(); 141 nfsrv_fini(); 142 143 /* Server uses server cache, so kill cache last. */ 144 nfsrv_finicache(); 145 nfs_fini(); 146 return 0; 147 case MODULE_CMD_AUTOUNLOAD: 148 if (netexport_hasexports()) 149 return EBUSY; 150 /*FALLTHROUGH*/ 151 default: 152 return ENOTTY; 153 } 154 } 155 156 /* 157 * nfs v3 access service 158 */ 159 int 160 nfsrv3_access(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 161 { 162 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 163 struct mbuf *nam = nfsd->nd_nam; 164 char *dpos = nfsd->nd_dpos; 165 kauth_cred_t cred = nfsd->nd_cr; 166 struct vnode *vp; 167 nfsrvfh_t nsfh; 168 u_int32_t *tl; 169 int32_t t1; 170 char *bpos; 171 int error = 0, rdonly, cache = 0, getret; 172 char *cp2; 173 struct mbuf *mb, *mreq __unused; 174 struct vattr va; 175 u_long inmode, testmode, outmode; 176 u_quad_t frev; 177 178 nfsm_srvmtofh(&nsfh); 179 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 180 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, &rdonly, 181 (nfsd->nd_flag & ND_KERBAUTH), false); 182 if (error) { 183 nfsm_reply(NFSX_UNSIGNED); 184 nfsm_srvpostop_attr(1, (struct vattr *)0); 185 return (0); 186 } 187 inmode = fxdr_unsigned(u_int32_t, *tl); 188 outmode = 0; 189 if ((inmode & NFSV3ACCESS_READ) && 190 nfsrv_access(vp, VREAD, cred, rdonly, lwp, 0) == 0) 191 outmode |= NFSV3ACCESS_READ; 192 if (vp->v_type != VDIR) { 193 testmode = inmode & (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND); 194 if (testmode && 195 nfsrv_access(vp, VWRITE, cred, rdonly, lwp, 0) == 0) 196 outmode |= testmode; 197 if ((inmode & NFSV3ACCESS_EXECUTE) && 198 nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 0) == 0) 199 outmode |= NFSV3ACCESS_EXECUTE; 200 } else { 201 testmode = inmode & (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | 202 NFSV3ACCESS_DELETE); 203 if (testmode && 204 nfsrv_access(vp, VWRITE, cred, rdonly, lwp, 0) == 0) 205 outmode |= testmode; 206 if ((inmode & NFSV3ACCESS_LOOKUP) && 207 nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 0) == 0) 208 outmode |= NFSV3ACCESS_LOOKUP; 209 } 210 getret = VOP_GETATTR(vp, &va, cred); 211 vput(vp); 212 nfsm_reply(NFSX_POSTOPATTR(1) + NFSX_UNSIGNED); 213 nfsm_srvpostop_attr(getret, &va); 214 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 215 *tl = txdr_unsigned(outmode); 216 nfsm_srvdone; 217 } 218 219 /* 220 * nfs getattr service 221 */ 222 int 223 nfsrv_getattr(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 224 { 225 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 226 struct mbuf *nam = nfsd->nd_nam; 227 char *dpos = nfsd->nd_dpos; 228 kauth_cred_t cred = nfsd->nd_cr; 229 struct nfs_fattr *fp; 230 struct vattr va; 231 struct vnode *vp; 232 nfsrvfh_t nsfh; 233 u_int32_t *tl; 234 int32_t t1; 235 char *bpos; 236 int error = 0, rdonly, cache = 0; 237 char *cp2; 238 struct mbuf *mb, *mreq __unused; 239 u_quad_t frev; 240 241 nfsm_srvmtofh(&nsfh); 242 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, &rdonly, 243 (nfsd->nd_flag & ND_KERBAUTH), false); 244 if (error) { 245 nfsm_reply(0); 246 return (0); 247 } 248 nqsrv_getl(vp, ND_READ); 249 error = VOP_GETATTR(vp, &va, cred); 250 vput(vp); 251 nfsm_reply(NFSX_FATTR(nfsd->nd_flag & ND_NFSV3)); 252 if (error) 253 return (0); 254 nfsm_build(fp, struct nfs_fattr *, NFSX_FATTR(nfsd->nd_flag & ND_NFSV3)); 255 nfsm_srvfillattr(&va, fp); 256 nfsm_srvdone; 257 } 258 259 /* 260 * nfs setattr service 261 */ 262 int 263 nfsrv_setattr(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 264 { 265 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 266 struct mbuf *nam = nfsd->nd_nam; 267 char *dpos = nfsd->nd_dpos; 268 kauth_cred_t cred = nfsd->nd_cr; 269 struct vattr va, preat; 270 struct nfsv2_sattr *sp; 271 struct nfs_fattr *fp; 272 struct vnode *vp; 273 nfsrvfh_t nsfh; 274 u_int32_t *tl; 275 int32_t t1; 276 char *bpos; 277 int error = 0, rdonly, cache = 0, preat_ret = 1, postat_ret = 1; 278 int v3 = (nfsd->nd_flag & ND_NFSV3), gcheck = 0; 279 char *cp2; 280 struct mbuf *mb, *mreq __unused; 281 u_quad_t frev; 282 struct timespec guard; 283 284 memset(&guard, 0, sizeof guard); /* XXX gcc */ 285 286 nfsm_srvmtofh(&nsfh); 287 vattr_null(&va); 288 if (v3) { 289 nfsm_srvsattr(&va); 290 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 291 gcheck = fxdr_unsigned(int, *tl); 292 if (gcheck) { 293 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 294 fxdr_nfsv3time(tl, &guard); 295 } 296 } else { 297 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 298 /* 299 * Nah nah nah nah na nah 300 * There is a bug in the Sun client that puts 0xffff in the mode 301 * field of sattr when it should put in 0xffffffff. The u_short 302 * doesn't sign extend. 303 * --> check the low order 2 bytes for 0xffff 304 */ 305 if ((fxdr_unsigned(int, sp->sa_mode) & 0xffff) != 0xffff) 306 va.va_mode = nfstov_mode(sp->sa_mode); 307 if (sp->sa_uid != nfs_xdrneg1) 308 va.va_uid = fxdr_unsigned(uid_t, sp->sa_uid); 309 if (sp->sa_gid != nfs_xdrneg1) 310 va.va_gid = fxdr_unsigned(gid_t, sp->sa_gid); 311 if (sp->sa_size != nfs_xdrneg1) 312 va.va_size = fxdr_unsigned(u_quad_t, sp->sa_size); 313 if (sp->sa_atime.nfsv2_sec != nfs_xdrneg1) { 314 #ifdef notyet 315 fxdr_nfsv2time(&sp->sa_atime, &va.va_atime); 316 #else 317 va.va_atime.tv_sec = 318 fxdr_unsigned(u_int32_t,sp->sa_atime.nfsv2_sec); 319 va.va_atime.tv_nsec = 0; 320 #endif 321 } 322 if (sp->sa_mtime.nfsv2_sec != nfs_xdrneg1) 323 fxdr_nfsv2time(&sp->sa_mtime, &va.va_mtime); 324 325 } 326 327 /* 328 * Now that we have all the fields, lets do it. 329 */ 330 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, &rdonly, 331 (nfsd->nd_flag & ND_KERBAUTH), false); 332 if (error) { 333 nfsm_reply(2 * NFSX_UNSIGNED); 334 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 335 return (0); 336 } 337 nqsrv_getl(vp, ND_WRITE); 338 if (v3) { 339 error = preat_ret = VOP_GETATTR(vp, &preat, cred); 340 if (!error && gcheck && 341 (preat.va_ctime.tv_sec != guard.tv_sec || 342 preat.va_ctime.tv_nsec != guard.tv_nsec)) 343 error = NFSERR_NOT_SYNC; 344 if (error) { 345 vput(vp); 346 nfsm_reply(NFSX_WCCDATA(v3)); 347 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 348 return (0); 349 } 350 } 351 352 /* 353 * If the size is being changed write acces is required, otherwise 354 * just check for a read only file system. 355 */ 356 if (va.va_size == ((u_quad_t)((quad_t) -1))) { 357 if (rdonly || (vp->v_mount->mnt_flag & MNT_RDONLY)) { 358 error = EROFS; 359 goto out; 360 } 361 } else { 362 if (vp->v_type == VDIR) { 363 error = EISDIR; 364 goto out; 365 } else if ((error = nfsrv_access(vp, VWRITE, cred, rdonly, 366 lwp, 0)) != 0) 367 goto out; 368 } 369 error = VOP_SETATTR(vp, &va, cred); 370 postat_ret = VOP_GETATTR(vp, &va, cred); 371 if (!error) 372 error = postat_ret; 373 out: 374 vput(vp); 375 nfsm_reply(NFSX_WCCORFATTR(v3)); 376 if (v3) { 377 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 378 return (0); 379 } else { 380 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 381 nfsm_srvfillattr(&va, fp); 382 } 383 nfsm_srvdone; 384 } 385 386 /* 387 * nfs lookup rpc 388 */ 389 int 390 nfsrv_lookup(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 391 { 392 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 393 struct mbuf *nam = nfsd->nd_nam; 394 char *dpos = nfsd->nd_dpos; 395 kauth_cred_t cred = nfsd->nd_cr; 396 struct nfs_fattr *fp; 397 struct nameidata nd, ind, *ndp = &nd; 398 struct pathbuf *ipb = NULL; 399 struct vnode *vp, *dirp; 400 nfsrvfh_t nsfh; 401 char *cp; 402 u_int32_t *tl; 403 int32_t t1; 404 char *bpos; 405 int error = 0, cache = 0, dirattr_ret = 1; 406 uint32_t len; 407 int v3 = (nfsd->nd_flag & ND_NFSV3), pubflag; 408 char *cp2; 409 struct mbuf *mb, *mreq __unused; 410 struct vattr va, dirattr; 411 u_quad_t frev; 412 413 nfsm_srvmtofh(&nsfh); 414 nfsm_srvnamesiz(len); 415 416 pubflag = nfs_ispublicfh(&nsfh); 417 418 nd.ni_cnd.cn_cred = cred; 419 nd.ni_cnd.cn_nameiop = LOOKUP; 420 nd.ni_cnd.cn_flags = LOCKLEAF; 421 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 422 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), pubflag); 423 424 if (!error && pubflag) { 425 if (nd.ni_vp->v_type == VDIR && nfs_pub.np_index != NULL && 426 (ipb = pathbuf_create(nfs_pub.np_index)) != NULL) { 427 /* 428 * Setup call to lookup() to see if we can find 429 * the index file. Arguably, this doesn't belong 430 * in a kernel.. Ugh. 431 */ 432 ind = nd; 433 VOP_UNLOCK(nd.ni_vp); 434 ind.ni_pathbuf = ipb; 435 436 error = lookup_for_nfsd_index(&ind, nd.ni_vp); 437 if (!error) { 438 /* 439 * Found an index file. Get rid of 440 * the old references. 441 */ 442 if (dirp) 443 vrele(dirp); 444 dirp = nd.ni_vp; 445 ndp = &ind; 446 } else 447 error = 0; 448 } 449 /* 450 * If the public filehandle was used, check that this lookup 451 * didn't result in a filehandle outside the publicly exported 452 * filesystem. 453 */ 454 455 if (!error && ndp->ni_vp->v_mount != nfs_pub.np_mount) { 456 vput(nd.ni_vp); 457 error = EPERM; 458 } 459 } 460 461 if (error) { 462 if (nd.ni_pathbuf != NULL) { 463 pathbuf_destroy(nd.ni_pathbuf); 464 } 465 if (ipb != NULL) { 466 pathbuf_destroy(ipb); 467 } 468 if (dirp) { 469 if (v3) { 470 vn_lock(dirp, LK_SHARED | LK_RETRY); 471 dirattr_ret = VOP_GETATTR(dirp, &dirattr, cred); 472 vput(dirp); 473 } else 474 vrele(dirp); 475 } 476 nfsm_reply(NFSX_POSTOPATTR(v3)); 477 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 478 return (0); 479 } 480 481 nqsrv_getl(ndp->ni_startdir, ND_READ); 482 pathbuf_destroy(nd.ni_pathbuf); 483 if (ipb != NULL) { 484 pathbuf_destroy(ipb); 485 } 486 vp = ndp->ni_vp; 487 error = nfsrv_composefh(vp, &nsfh, v3); 488 if (!error) 489 error = VOP_GETATTR(vp, &va, cred); 490 vput(vp); 491 if (dirp) { 492 if (v3) { 493 vn_lock(dirp, LK_SHARED | LK_RETRY); 494 dirattr_ret = VOP_GETATTR(dirp, &dirattr, cred); 495 vput(dirp); 496 } else 497 vrele(dirp); 498 } 499 nfsm_reply(NFSX_SRVFH(&nsfh, v3) + NFSX_POSTOPORFATTR(v3) + 500 NFSX_POSTOPATTR(v3)); 501 if (error) { 502 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 503 return (0); 504 } 505 nfsm_srvfhtom(&nsfh, v3); 506 if (v3) { 507 nfsm_srvpostop_attr(0, &va); 508 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 509 } else { 510 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 511 nfsm_srvfillattr(&va, fp); 512 } 513 nfsm_srvdone; 514 } 515 516 /* 517 * nfs readlink service 518 */ 519 int 520 nfsrv_readlink(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 521 { 522 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 523 struct mbuf *nam = nfsd->nd_nam; 524 char *dpos = nfsd->nd_dpos; 525 kauth_cred_t cred = nfsd->nd_cr; 526 struct iovec iv[(NFS_MAXPATHLEN+MLEN-1)/MLEN]; 527 struct iovec *ivp = iv; 528 struct mbuf *mp; 529 u_int32_t *tl; 530 int32_t t1; 531 char *bpos; 532 int error = 0, rdonly, cache = 0, i, padlen, getret; 533 uint32_t len; 534 int v3 = (nfsd->nd_flag & ND_NFSV3); 535 char *cp2; 536 struct mbuf *mb, *mp2 = NULL, *mp3 = NULL, *mreq __unused; 537 struct vnode *vp; 538 struct vattr attr; 539 nfsrvfh_t nsfh; 540 struct uio io, *uiop = &io; 541 u_quad_t frev; 542 543 nfsm_srvmtofh(&nsfh); 544 len = 0; 545 i = 0; 546 while (len < NFS_MAXPATHLEN) { 547 mp = m_get(M_WAIT, MT_DATA); 548 MCLAIM(mp, &nfs_mowner); 549 m_clget(mp, M_WAIT); 550 mp->m_len = NFSMSIZ(mp); 551 if (len == 0) 552 mp3 = mp2 = mp; 553 else { 554 mp2->m_next = mp; 555 mp2 = mp; 556 } 557 if ((len+mp->m_len) > NFS_MAXPATHLEN) { 558 mp->m_len = NFS_MAXPATHLEN-len; 559 len = NFS_MAXPATHLEN; 560 } else 561 len += mp->m_len; 562 ivp->iov_base = mtod(mp, void *); 563 ivp->iov_len = mp->m_len; 564 i++; 565 ivp++; 566 } 567 uiop->uio_iov = iv; 568 uiop->uio_iovcnt = i; 569 uiop->uio_offset = 0; 570 uiop->uio_resid = len; 571 uiop->uio_rw = UIO_READ; 572 UIO_SETUP_SYSSPACE(uiop); 573 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 574 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 575 if (error) { 576 m_freem(mp3); 577 nfsm_reply(2 * NFSX_UNSIGNED); 578 nfsm_srvpostop_attr(1, (struct vattr *)0); 579 return (0); 580 } 581 if (vp->v_type != VLNK) { 582 if (v3) 583 error = EINVAL; 584 else 585 error = ENXIO; 586 goto out; 587 } 588 nqsrv_getl(vp, ND_READ); 589 error = VOP_READLINK(vp, uiop, cred); 590 out: 591 getret = VOP_GETATTR(vp, &attr, cred); 592 vput(vp); 593 if (error) 594 m_freem(mp3); 595 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_UNSIGNED); 596 if (v3) { 597 nfsm_srvpostop_attr(getret, &attr); 598 if (error) 599 return (0); 600 } 601 len -= uiop->uio_resid; 602 padlen = nfsm_padlen(len); 603 if (len == 0) { 604 m_freem(mp3); 605 mp3 = NULL; 606 } else if (uiop->uio_resid || padlen) 607 nfs_zeropad(mp3, uiop->uio_resid, padlen); 608 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 609 *tl = txdr_unsigned(len); 610 mb->m_next = mp3; 611 nfsm_srvdone; 612 } 613 614 /* 615 * nfs read service 616 */ 617 int 618 nfsrv_read(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 619 { 620 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 621 struct mbuf *nam = nfsd->nd_nam; 622 char *dpos = nfsd->nd_dpos; 623 kauth_cred_t cred = nfsd->nd_cr; 624 struct mbuf *m; 625 struct nfs_fattr *fp; 626 u_int32_t *tl; 627 int32_t t1; 628 int i; 629 char *bpos; 630 int error = 0, rdonly, cache = 0, getret; 631 int v3 = (nfsd->nd_flag & ND_NFSV3); 632 uint32_t reqlen, len, cnt, left; 633 int padlen; 634 char *cp2; 635 struct mbuf *mb, *mreq; 636 struct vnode *vp; 637 nfsrvfh_t nsfh; 638 struct uio io, *uiop = &io; 639 struct vattr va; 640 off_t off; 641 u_quad_t frev; 642 643 nfsm_srvmtofh(&nsfh); 644 if (v3) { 645 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 646 off = fxdr_hyper(tl); 647 } else { 648 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 649 off = (off_t)fxdr_unsigned(u_int32_t, *tl); 650 } 651 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 652 reqlen = fxdr_unsigned(uint32_t, *tl); 653 reqlen = MIN(reqlen, NFS_SRVMAXDATA(nfsd)); 654 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 655 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 656 if (error) { 657 nfsm_reply(2 * NFSX_UNSIGNED); 658 nfsm_srvpostop_attr(1, (struct vattr *)0); 659 return (0); 660 } 661 if (vp->v_type != VREG) { 662 if (v3) 663 error = EINVAL; 664 else 665 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 666 } 667 if (!error) { 668 nqsrv_getl(vp, ND_READ); 669 if ((error = nfsrv_access(vp, VREAD, cred, rdonly, lwp, 1)) != 0) 670 error = nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 1); 671 } 672 getret = VOP_GETATTR(vp, &va, cred); 673 if (!error) 674 error = getret; 675 if (error) { 676 vput(vp); 677 nfsm_reply(NFSX_POSTOPATTR(v3)); 678 nfsm_srvpostop_attr(getret, &va); 679 return (0); 680 } 681 if (off >= va.va_size) 682 cnt = 0; 683 else if ((off + reqlen) > va.va_size) 684 cnt = va.va_size - off; 685 else 686 cnt = reqlen; 687 nfsm_reply(NFSX_POSTOPORFATTR(v3) + 3 * NFSX_UNSIGNED+nfsm_rndup(cnt)); 688 if (v3) { 689 nfsm_build(tl, u_int32_t *, NFSX_V3FATTR + 4 * NFSX_UNSIGNED); 690 *tl++ = nfs_true; 691 fp = (struct nfs_fattr *)tl; 692 tl += (NFSX_V3FATTR / sizeof (u_int32_t)); 693 } else { 694 nfsm_build(tl, u_int32_t *, NFSX_V2FATTR + NFSX_UNSIGNED); 695 fp = (struct nfs_fattr *)tl; 696 tl += (NFSX_V2FATTR / sizeof (u_int32_t)); 697 } 698 len = left = cnt; 699 if (cnt > 0) { 700 if (nfsd_use_loan) { 701 struct vm_page **pgpp; 702 voff_t pgoff = trunc_page(off); 703 int npages; 704 vaddr_t lva; 705 706 npages = (round_page(off + cnt) - pgoff) >> PAGE_SHIFT; 707 KASSERT(npages <= M_EXT_MAXPAGES); /* XXX */ 708 709 /* allocate kva for mbuf data */ 710 lva = sokvaalloc(pgoff, npages << PAGE_SHIFT, 711 slp->ns_so); 712 if (lva == 0) { 713 /* fall back to VOP_READ */ 714 goto loan_fail; 715 } 716 717 /* allocate mbuf */ 718 m = m_get(M_WAIT, MT_DATA); 719 MCLAIM(m, &nfs_mowner); 720 pgpp = m->m_ext.ext_pgs; 721 722 /* loan pages */ 723 error = uvm_loanuobjpages(&vp->v_uobj, pgoff, npages, 724 pgpp); 725 if (error) { 726 sokvafree(lva, npages << PAGE_SHIFT); 727 m_free(m); 728 if (error == EBUSY) 729 goto loan_fail; 730 goto read_error; 731 } 732 733 /* associate kva to mbuf */ 734 MEXTADD(m, (void *)(lva + ((vaddr_t)off & PAGE_MASK)), 735 cnt, M_MBUF, soloanfree, slp->ns_so); 736 m->m_flags |= M_EXT_PAGES | M_EXT_ROMAP; 737 m->m_len = cnt; 738 739 /* map pages */ 740 for (i = 0; i < npages; i++) { 741 pmap_kenter_pa(lva, VM_PAGE_TO_PHYS(pgpp[i]), 742 VM_PROT_READ, 0); 743 lva += PAGE_SIZE; 744 } 745 746 pmap_update(pmap_kernel()); 747 748 mb->m_next = m; 749 mb = m; 750 error = 0; 751 uiop->uio_resid = 0; 752 } else { 753 struct iovec *iv; 754 struct iovec *iv2; 755 struct mbuf *m2; 756 int siz; 757 loan_fail: 758 /* 759 * Generate the mbuf list with the uio_iov ref. to it. 760 */ 761 i = 0; 762 m = m2 = mb; 763 while (left > 0) { 764 siz = uimin(M_TRAILINGSPACE(m), left); 765 if (siz > 0) { 766 left -= siz; 767 i++; 768 } 769 if (left > 0) { 770 m = m_get(M_WAIT, MT_DATA); 771 MCLAIM(m, &nfs_mowner); 772 m_clget(m, M_WAIT); 773 m->m_len = 0; 774 m2->m_next = m; 775 m2 = m; 776 } 777 } 778 iv = malloc(i * sizeof(struct iovec), M_TEMP, M_WAITOK); 779 uiop->uio_iov = iv2 = iv; 780 m = mb; 781 left = cnt; 782 i = 0; 783 while (left > 0) { 784 if (m == NULL) 785 panic("nfsrv_read iov"); 786 siz = uimin(M_TRAILINGSPACE(m), left); 787 if (siz > 0) { 788 iv->iov_base = mtod(m, char *) + 789 m->m_len; 790 iv->iov_len = siz; 791 m->m_len += siz; 792 left -= siz; 793 iv++; 794 i++; 795 } 796 m = m->m_next; 797 } 798 uiop->uio_iovcnt = i; 799 uiop->uio_offset = off; 800 uiop->uio_resid = cnt; 801 uiop->uio_rw = UIO_READ; 802 UIO_SETUP_SYSSPACE(uiop); 803 error = VOP_READ(vp, uiop, IO_NODELOCKED, cred); 804 free((void *)iv2, M_TEMP); 805 } 806 read_error: 807 if (error || (getret = VOP_GETATTR(vp, &va, cred)) != 0){ 808 if (!error) 809 error = getret; 810 m_freem(mreq); 811 vput(vp); 812 nfsm_reply(NFSX_POSTOPATTR(v3)); 813 nfsm_srvpostop_attr(getret, &va); 814 return (0); 815 } 816 } else { 817 uiop->uio_resid = 0; 818 } 819 vput(vp); 820 nfsm_srvfillattr(&va, fp); 821 len -= uiop->uio_resid; 822 padlen = nfsm_padlen(len); 823 if (uiop->uio_resid || padlen) 824 nfs_zeropad(mb, uiop->uio_resid, padlen); 825 if (v3) { 826 /* count */ 827 *tl++ = txdr_unsigned(len); 828 /* eof */ 829 if (off + len >= va.va_size) 830 *tl++ = nfs_true; 831 else 832 *tl++ = nfs_false; 833 } 834 *tl = txdr_unsigned(len); 835 nfsm_srvdone; 836 } 837 838 /* 839 * nfs write service 840 */ 841 int 842 nfsrv_write(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 843 { 844 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 845 struct mbuf *nam = nfsd->nd_nam; 846 char *dpos = nfsd->nd_dpos; 847 kauth_cred_t cred = nfsd->nd_cr; 848 struct iovec *ivp; 849 int i, cnt; 850 struct mbuf *mp; 851 struct nfs_fattr *fp; 852 struct iovec *iv; 853 struct vattr va, forat; 854 u_int32_t *tl; 855 int32_t t1; 856 char *bpos; 857 int error = 0, rdonly, cache = 0, len, forat_ret = 1; 858 int ioflags, aftat_ret = 1, retlen, zeroing, adjust; 859 int stable = NFSV3WRITE_FILESYNC; 860 int v3 = (nfsd->nd_flag & ND_NFSV3); 861 char *cp2; 862 struct mbuf *mb, *mreq __unused; 863 struct vnode *vp; 864 nfsrvfh_t nsfh; 865 struct uio io, *uiop = &io; 866 off_t off; 867 u_quad_t frev; 868 869 if (mrep == NULL) { 870 *mrq = NULL; 871 return (0); 872 } 873 nfsm_srvmtofh(&nsfh); 874 if (v3) { 875 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 876 off = fxdr_hyper(tl); 877 tl += 3; 878 stable = fxdr_unsigned(int, *tl++); 879 } else { 880 nfsm_dissect(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 881 off = (off_t)fxdr_unsigned(u_int32_t, *++tl); 882 tl += 2; 883 } 884 retlen = len = fxdr_unsigned(int32_t, *tl); 885 cnt = i = 0; 886 887 /* 888 * For NFS Version 2, it is not obvious what a write of zero length 889 * should do, but I might as well be consistent with Version 3, 890 * which is to return ok so long as there are no permission problems. 891 */ 892 if (len > 0) { 893 zeroing = 1; 894 mp = mrep; 895 while (mp) { 896 if (mp == md) { 897 zeroing = 0; 898 adjust = dpos - mtod(mp, char *); 899 mp->m_len -= adjust; 900 if (mp->m_len > 0 && adjust > 0) 901 NFSMADV(mp, adjust); 902 } 903 if (zeroing) 904 mp->m_len = 0; 905 else if (mp->m_len > 0) { 906 i += mp->m_len; 907 if (i > len) { 908 mp->m_len -= (i - len); 909 zeroing = 1; 910 } 911 if (mp->m_len > 0) 912 cnt++; 913 } 914 mp = mp->m_next; 915 } 916 } 917 if (len > NFS_MAXDATA || len < 0 || i < len) { 918 error = EIO; 919 nfsm_reply(2 * NFSX_UNSIGNED); 920 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 921 return (0); 922 } 923 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 924 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 925 if (error) { 926 nfsm_reply(2 * NFSX_UNSIGNED); 927 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 928 return (0); 929 } 930 if (v3) 931 forat_ret = VOP_GETATTR(vp, &forat, cred); 932 if (vp->v_type != VREG) { 933 if (v3) 934 error = EINVAL; 935 else 936 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 937 } 938 if (!error) { 939 nqsrv_getl(vp, ND_WRITE); 940 error = nfsrv_access(vp, VWRITE, cred, rdonly, lwp, 1); 941 } 942 if (error) { 943 vput(vp); 944 nfsm_reply(NFSX_WCCDATA(v3)); 945 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 946 return (0); 947 } 948 949 if (len > 0) { 950 ivp = malloc(cnt * sizeof (struct iovec), M_TEMP, M_WAITOK); 951 uiop->uio_iov = iv = ivp; 952 uiop->uio_iovcnt = cnt; 953 mp = mrep; 954 while (mp) { 955 if (mp->m_len > 0) { 956 ivp->iov_base = mtod(mp, void *); 957 ivp->iov_len = mp->m_len; 958 ivp++; 959 } 960 mp = mp->m_next; 961 } 962 963 /* 964 * XXX 965 * The IO_METASYNC flag indicates that all metadata (and not 966 * just enough to ensure data integrity) must be written to 967 * stable storage synchronously. 968 * (IO_METASYNC is not yet implemented in 4.4BSD-Lite.) 969 */ 970 if (stable == NFSV3WRITE_UNSTABLE) 971 ioflags = IO_NODELOCKED; 972 else if (stable == NFSV3WRITE_DATASYNC) 973 ioflags = (IO_SYNC | IO_NODELOCKED); 974 else 975 ioflags = (IO_METASYNC | IO_SYNC | IO_NODELOCKED); 976 uiop->uio_resid = len; 977 uiop->uio_rw = UIO_WRITE; 978 uiop->uio_offset = off; 979 UIO_SETUP_SYSSPACE(uiop); 980 error = VOP_WRITE(vp, uiop, ioflags, cred); 981 nfsstats.srvvop_writes++; 982 free(iv, M_TEMP); 983 } 984 aftat_ret = VOP_GETATTR(vp, &va, cred); 985 vput(vp); 986 if (!error) 987 error = aftat_ret; 988 nfsm_reply(NFSX_PREOPATTR(v3) + NFSX_POSTOPORFATTR(v3) + 989 2 * NFSX_UNSIGNED + NFSX_WRITEVERF(v3)); 990 if (v3) { 991 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 992 if (error) 993 return (0); 994 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 995 *tl++ = txdr_unsigned(retlen); 996 if (stable == NFSV3WRITE_UNSTABLE) 997 *tl++ = txdr_unsigned(stable); 998 else 999 *tl++ = txdr_unsigned(NFSV3WRITE_FILESYNC); 1000 /* 1001 * Actually, there is no need to txdr these fields, 1002 * but it may make the values more human readable, 1003 * for debugging purposes. 1004 */ 1005 *tl++ = txdr_unsigned(boottime.tv_sec); 1006 *tl = txdr_unsigned(boottime.tv_nsec / 1000); 1007 } else { 1008 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 1009 nfsm_srvfillattr(&va, fp); 1010 } 1011 nfsm_srvdone; 1012 } 1013 1014 /* 1015 * XXX elad: the original NFSW_SAMECRED() macro also made sure the 1016 * two nd_flag fields of the descriptors contained 1017 * ND_KERBAUTH. 1018 */ 1019 static int 1020 nfsrv_samecred(kauth_cred_t cred1, kauth_cred_t cred2) 1021 { 1022 int i, do_ngroups; 1023 1024 if (kauth_cred_geteuid(cred1) != kauth_cred_geteuid(cred2)) 1025 return (0); 1026 if (kauth_cred_ngroups(cred1) != kauth_cred_ngroups(cred2)) 1027 return (0); 1028 do_ngroups = kauth_cred_ngroups(cred1); 1029 for (i = 0; i < do_ngroups; i++) 1030 if (kauth_cred_group(cred1, i) != 1031 kauth_cred_group(cred2, i)) 1032 return (0); 1033 1034 return (1); 1035 } 1036 1037 static struct nfsrvw_delayhash * 1038 nfsrv_nwdelayhash(struct nfssvc_sock *slp, const nfsrvfh_t *nsfh) 1039 { 1040 uint32_t hash; 1041 1042 hash = hash32_buf(NFSRVFH_DATA(nsfh), NFSRVFH_SIZE(nsfh), 1043 HASH32_BUF_INIT); 1044 return &slp->ns_wdelayhashtbl[hash % NFS_WDELAYHASHSIZ]; 1045 } 1046 1047 /* 1048 * NFS write service with write gathering support. Called when 1049 * nfsrvw_procrastinate > 0. 1050 * See: Chet Juszczak, "Improving the Write Performance of an NFS Server", 1051 * in Proc. of the Winter 1994 Usenix Conference, pg. 247-259, San Franscisco, 1052 * Jan. 1994. 1053 */ 1054 int 1055 nfsrv_writegather(struct nfsrv_descript **ndp, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 1056 { 1057 struct timeval now; 1058 struct iovec *ivp; 1059 struct mbuf *mp; 1060 struct nfsrv_descript *wp, *nfsd, *owp, *swp; 1061 struct nfs_fattr *fp; 1062 int i = 0; 1063 struct iovec *iov; 1064 struct nfsrvw_delayhash *wpp; 1065 kauth_cred_t cred; 1066 struct vattr va, forat; 1067 u_int32_t *tl; 1068 int32_t t1; 1069 char *bpos, *dpos; 1070 int error = 0, rdonly, cache = 0, len = 0, forat_ret = 1; 1071 int ioflags, aftat_ret = 1, adjust, v3, zeroing; 1072 char *cp2; 1073 struct mbuf *mb, *mreq, *mrep, *md; 1074 struct vnode *vp; 1075 struct uio io, *uiop = &io; 1076 u_quad_t frev, cur_usec; 1077 1078 *mrq = NULL; 1079 if (*ndp) { 1080 nfsd = *ndp; 1081 *ndp = NULL; 1082 mrep = nfsd->nd_mrep; 1083 md = nfsd->nd_md; 1084 dpos = nfsd->nd_dpos; 1085 cred = nfsd->nd_cr; 1086 v3 = (nfsd->nd_flag & ND_NFSV3); 1087 LIST_INIT(&nfsd->nd_coalesce); 1088 nfsd->nd_mreq = NULL; 1089 nfsd->nd_stable = NFSV3WRITE_FILESYNC; 1090 getmicrotime(&now); 1091 cur_usec = (u_quad_t)now.tv_sec * 1000000 + (u_quad_t)now.tv_usec; 1092 nfsd->nd_time = cur_usec + nfsrvw_procrastinate; 1093 1094 /* 1095 * Now, get the write header.. 1096 */ 1097 nfsm_srvmtofh(&nfsd->nd_fh); 1098 if (v3) { 1099 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 1100 nfsd->nd_off = fxdr_hyper(tl); 1101 tl += 3; 1102 nfsd->nd_stable = fxdr_unsigned(int, *tl++); 1103 } else { 1104 nfsm_dissect(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1105 nfsd->nd_off = (off_t)fxdr_unsigned(u_int32_t, *++tl); 1106 tl += 2; 1107 } 1108 len = fxdr_unsigned(int32_t, *tl); 1109 nfsd->nd_len = len; 1110 nfsd->nd_eoff = nfsd->nd_off + len; 1111 1112 /* 1113 * Trim the header out of the mbuf list and trim off any trailing 1114 * junk so that the mbuf list has only the write data. 1115 */ 1116 zeroing = 1; 1117 i = 0; 1118 mp = mrep; 1119 while (mp) { 1120 if (mp == md) { 1121 zeroing = 0; 1122 adjust = dpos - mtod(mp, char *); 1123 mp->m_len -= adjust; 1124 if (mp->m_len > 0 && adjust > 0) 1125 NFSMADV(mp, adjust); 1126 } 1127 if (zeroing) 1128 mp->m_len = 0; 1129 else { 1130 i += mp->m_len; 1131 if (i > len) { 1132 mp->m_len -= (i - len); 1133 zeroing = 1; 1134 } 1135 } 1136 mp = mp->m_next; 1137 } 1138 if (len > NFS_MAXDATA || len < 0 || i < len) { 1139 nfsmout: 1140 m_freem(mrep); 1141 error = EIO; 1142 nfsm_writereply(2 * NFSX_UNSIGNED, v3); 1143 if (v3) 1144 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1145 nfsd->nd_mreq = mreq; 1146 nfsd->nd_mrep = NULL; 1147 nfsd->nd_time = 0; 1148 } 1149 1150 /* 1151 * Add this entry to the hash and time queues. 1152 */ 1153 owp = NULL; 1154 mutex_enter(&nfsd_lock); 1155 wp = LIST_FIRST(&slp->ns_tq); 1156 while (wp && wp->nd_time < nfsd->nd_time) { 1157 owp = wp; 1158 wp = LIST_NEXT(wp, nd_tq); 1159 } 1160 if (owp) { 1161 LIST_INSERT_AFTER(owp, nfsd, nd_tq); 1162 } else { 1163 LIST_INSERT_HEAD(&slp->ns_tq, nfsd, nd_tq); 1164 } 1165 if (nfsd->nd_mrep) { 1166 wpp = nfsrv_nwdelayhash(slp, &nfsd->nd_fh); 1167 owp = NULL; 1168 wp = LIST_FIRST(wpp); 1169 while (wp && nfsrv_comparefh(&nfsd->nd_fh, &wp->nd_fh)) { 1170 owp = wp; 1171 wp = LIST_NEXT(wp, nd_hash); 1172 } 1173 while (wp && wp->nd_off < nfsd->nd_off && 1174 !nfsrv_comparefh(&nfsd->nd_fh, &wp->nd_fh)) { 1175 owp = wp; 1176 wp = LIST_NEXT(wp, nd_hash); 1177 } 1178 if (owp) { 1179 LIST_INSERT_AFTER(owp, nfsd, nd_hash); 1180 1181 /* 1182 * Search the hash list for overlapping entries and 1183 * coalesce. 1184 */ 1185 for(; nfsd && NFSW_CONTIG(owp, nfsd); nfsd = wp) { 1186 wp = LIST_NEXT(nfsd, nd_hash); 1187 if (nfsrv_samecred(owp->nd_cr, nfsd->nd_cr)) 1188 nfsrvw_coalesce(owp, nfsd); 1189 } 1190 } else { 1191 LIST_INSERT_HEAD(wpp, nfsd, nd_hash); 1192 } 1193 } 1194 mutex_exit(&nfsd_lock); 1195 } 1196 1197 /* 1198 * Now, do VOP_WRITE()s for any one(s) that need to be done now 1199 * and generate the associated reply mbuf list(s). 1200 */ 1201 loop1: 1202 getmicrotime(&now); 1203 cur_usec = (u_quad_t)now.tv_sec * 1000000 + (u_quad_t)now.tv_usec; 1204 mutex_enter(&nfsd_lock); 1205 for (nfsd = LIST_FIRST(&slp->ns_tq); nfsd; nfsd = owp) { 1206 owp = LIST_NEXT(nfsd, nd_tq); 1207 if (nfsd->nd_time > cur_usec) 1208 break; 1209 if (nfsd->nd_mreq) 1210 continue; 1211 LIST_REMOVE(nfsd, nd_tq); 1212 LIST_REMOVE(nfsd, nd_hash); 1213 mutex_exit(&nfsd_lock); 1214 1215 mrep = nfsd->nd_mrep; 1216 nfsd->nd_mrep = NULL; 1217 cred = nfsd->nd_cr; 1218 v3 = (nfsd->nd_flag & ND_NFSV3); 1219 forat_ret = aftat_ret = 1; 1220 error = nfsrv_fhtovp(&nfsd->nd_fh, 1, &vp, cred, slp, 1221 nfsd->nd_nam, &rdonly, (nfsd->nd_flag & ND_KERBAUTH), 1222 false); 1223 if (!error) { 1224 if (v3) 1225 forat_ret = VOP_GETATTR(vp, &forat, cred); 1226 if (vp->v_type != VREG) { 1227 if (v3) 1228 error = EINVAL; 1229 else 1230 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 1231 } 1232 } else 1233 vp = NULL; 1234 if (!error) { 1235 nqsrv_getl(vp, ND_WRITE); 1236 error = nfsrv_access(vp, VWRITE, cred, rdonly, lwp, 1); 1237 } 1238 1239 if (nfsd->nd_stable == NFSV3WRITE_UNSTABLE) 1240 ioflags = IO_NODELOCKED; 1241 else if (nfsd->nd_stable == NFSV3WRITE_DATASYNC) 1242 ioflags = (IO_SYNC | IO_NODELOCKED); 1243 else 1244 ioflags = (IO_METASYNC | IO_SYNC | IO_NODELOCKED); 1245 uiop->uio_rw = UIO_WRITE; 1246 uiop->uio_offset = nfsd->nd_off; 1247 uiop->uio_resid = nfsd->nd_eoff - nfsd->nd_off; 1248 UIO_SETUP_SYSSPACE(uiop); 1249 if (uiop->uio_resid > 0) { 1250 mp = mrep; 1251 i = 0; 1252 while (mp) { 1253 if (mp->m_len > 0) 1254 i++; 1255 mp = mp->m_next; 1256 } 1257 uiop->uio_iovcnt = i; 1258 iov = malloc(i * sizeof (struct iovec), M_TEMP, M_WAITOK); 1259 uiop->uio_iov = ivp = iov; 1260 mp = mrep; 1261 while (mp) { 1262 if (mp->m_len > 0) { 1263 ivp->iov_base = mtod(mp, void *); 1264 ivp->iov_len = mp->m_len; 1265 ivp++; 1266 } 1267 mp = mp->m_next; 1268 } 1269 if (!error) { 1270 error = VOP_WRITE(vp, uiop, ioflags, cred); 1271 nfsstats.srvvop_writes++; 1272 } 1273 free((void *)iov, M_TEMP); 1274 } 1275 m_freem(mrep); 1276 if (vp) { 1277 aftat_ret = VOP_GETATTR(vp, &va, cred); 1278 vput(vp); 1279 } 1280 1281 /* 1282 * Loop around generating replies for all write rpcs that have 1283 * now been completed. 1284 */ 1285 swp = nfsd; 1286 do { 1287 if (error) { 1288 nfsm_writereply(NFSX_WCCDATA(v3), v3); 1289 if (v3) { 1290 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1291 } 1292 } else { 1293 nfsm_writereply(NFSX_PREOPATTR(v3) + 1294 NFSX_POSTOPORFATTR(v3) + 2 * NFSX_UNSIGNED + 1295 NFSX_WRITEVERF(v3), v3); 1296 if (v3) { 1297 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1298 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1299 *tl++ = txdr_unsigned(nfsd->nd_len); 1300 *tl++ = txdr_unsigned(swp->nd_stable); 1301 /* 1302 * Actually, there is no need to txdr these fields, 1303 * but it may make the values more human readable, 1304 * for debugging purposes. 1305 */ 1306 *tl++ = txdr_unsigned(boottime.tv_sec); 1307 *tl = txdr_unsigned(boottime.tv_nsec / 1000); 1308 } else { 1309 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 1310 nfsm_srvfillattr(&va, fp); 1311 } 1312 } 1313 nfsd->nd_mreq = mreq; 1314 if (nfsd->nd_mrep) 1315 panic("nfsrv_write: nd_mrep not free"); 1316 1317 /* 1318 * Done. Put it at the head of the timer queue so that 1319 * the final phase can return the reply. 1320 */ 1321 mutex_enter(&nfsd_lock); 1322 if (nfsd != swp) { 1323 nfsd->nd_time = 0; 1324 LIST_INSERT_HEAD(&slp->ns_tq, nfsd, nd_tq); 1325 } 1326 nfsd = LIST_FIRST(&swp->nd_coalesce); 1327 if (nfsd) { 1328 LIST_REMOVE(nfsd, nd_tq); 1329 } 1330 mutex_exit(&nfsd_lock); 1331 } while (nfsd); 1332 swp->nd_time = 0; 1333 1334 mutex_enter(&nfsd_lock); 1335 LIST_INSERT_HEAD(&slp->ns_tq, swp, nd_tq); 1336 mutex_exit(&nfsd_lock); 1337 goto loop1; 1338 } 1339 mutex_exit(&nfsd_lock); 1340 nfs_timer_start(); 1341 1342 /* 1343 * Search for a reply to return. 1344 */ 1345 mutex_enter(&nfsd_lock); 1346 LIST_FOREACH(nfsd, &slp->ns_tq, nd_tq) { 1347 if (nfsd->nd_mreq) { 1348 LIST_REMOVE(nfsd, nd_tq); 1349 *mrq = nfsd->nd_mreq; 1350 *ndp = nfsd; 1351 break; 1352 } 1353 } 1354 mutex_exit(&nfsd_lock); 1355 return (0); 1356 } 1357 1358 /* 1359 * Coalesce the write request nfsd into owp. To do this we must: 1360 * - remove nfsd from the queues 1361 * - merge nfsd->nd_mrep into owp->nd_mrep 1362 * - update the nd_eoff and nd_stable for owp 1363 * - put nfsd on owp's nd_coalesce list 1364 * NB: Must be called at splsoftclock(). 1365 */ 1366 void 1367 nfsrvw_coalesce(struct nfsrv_descript *owp, struct nfsrv_descript *nfsd) 1368 { 1369 int overlap; 1370 struct mbuf *mp; 1371 struct nfsrv_descript *m; 1372 1373 KASSERT(mutex_owned(&nfsd_lock)); 1374 1375 LIST_REMOVE(nfsd, nd_hash); 1376 LIST_REMOVE(nfsd, nd_tq); 1377 if (owp->nd_eoff < nfsd->nd_eoff) { 1378 overlap = owp->nd_eoff - nfsd->nd_off; 1379 if (overlap < 0) 1380 panic("nfsrv_coalesce: bad off"); 1381 if (overlap > 0) 1382 m_adj(nfsd->nd_mrep, overlap); 1383 mp = owp->nd_mrep; 1384 while (mp->m_next) 1385 mp = mp->m_next; 1386 mp->m_next = nfsd->nd_mrep; 1387 owp->nd_eoff = nfsd->nd_eoff; 1388 } else 1389 m_freem(nfsd->nd_mrep); 1390 nfsd->nd_mrep = NULL; 1391 if (nfsd->nd_stable == NFSV3WRITE_FILESYNC) 1392 owp->nd_stable = NFSV3WRITE_FILESYNC; 1393 else if (nfsd->nd_stable == NFSV3WRITE_DATASYNC && 1394 owp->nd_stable == NFSV3WRITE_UNSTABLE) 1395 owp->nd_stable = NFSV3WRITE_DATASYNC; 1396 LIST_INSERT_HEAD(&owp->nd_coalesce, nfsd, nd_tq); 1397 /* 1398 * nfsd might hold coalesce elements! Move them to owp. 1399 * Otherwise, requests may be lost and clients will be stuck. 1400 */ 1401 while ((m = LIST_FIRST(&nfsd->nd_coalesce)) != NULL) { 1402 LIST_REMOVE(m, nd_tq); 1403 LIST_INSERT_HEAD(&owp->nd_coalesce, m, nd_tq); 1404 } 1405 } 1406 1407 /* 1408 * nfs create service 1409 * now does a truncate to 0 length via. setattr if it already exists 1410 */ 1411 int 1412 nfsrv_create(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 1413 { 1414 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1415 struct mbuf *nam = nfsd->nd_nam; 1416 char *dpos = nfsd->nd_dpos; 1417 kauth_cred_t cred = nfsd->nd_cr; 1418 struct nfs_fattr *fp; 1419 struct vattr va, dirfor, diraft; 1420 struct nfsv2_sattr *sp; 1421 u_int32_t *tl; 1422 struct nameidata nd; 1423 char *cp; 1424 int32_t t1; 1425 char *bpos; 1426 int error = 0, cache = 0, len, tsize, dirfor_ret = 1, diraft_ret = 1; 1427 int rdev = 0, abort = 0; 1428 int v3 = (nfsd->nd_flag & ND_NFSV3), how, exclusive_flag = 0; 1429 char *cp2; 1430 struct mbuf *mb, *mreq __unused; 1431 struct vnode *vp = NULL, *dirp = NULL; 1432 nfsrvfh_t nsfh; 1433 u_quad_t frev, tempsize; 1434 u_char cverf[NFSX_V3CREATEVERF]; 1435 1436 nd.ni_cnd.cn_nameiop = 0; 1437 nfsm_srvmtofh(&nsfh); 1438 nfsm_srvnamesiz(len); 1439 nd.ni_cnd.cn_cred = cred; 1440 nd.ni_cnd.cn_nameiop = CREATE; 1441 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 1442 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 1443 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 1444 if (dirp && v3) { 1445 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); 1446 } 1447 if (error) { 1448 nfsm_reply(NFSX_WCCDATA(v3)); 1449 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1450 if (dirp) 1451 vrele(dirp); 1452 if (nd.ni_pathbuf != NULL) { 1453 pathbuf_destroy(nd.ni_pathbuf); 1454 nd.ni_pathbuf = NULL; 1455 } 1456 return (0); 1457 } 1458 abort = 1; 1459 vattr_null(&va); 1460 if (v3) { 1461 va.va_mode = 0; 1462 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1463 how = fxdr_unsigned(int, *tl); 1464 switch (how) { 1465 case NFSV3CREATE_GUARDED: 1466 if (nd.ni_vp) { 1467 error = EEXIST; 1468 break; 1469 } 1470 /* FALLTHROUGH */ 1471 case NFSV3CREATE_UNCHECKED: 1472 nfsm_srvsattr(&va); 1473 break; 1474 case NFSV3CREATE_EXCLUSIVE: 1475 nfsm_dissect(cp, void *, NFSX_V3CREATEVERF); 1476 memcpy(cverf, cp, NFSX_V3CREATEVERF); 1477 exclusive_flag = 1; 1478 break; 1479 }; 1480 va.va_type = VREG; 1481 } else { 1482 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1483 va.va_type = IFTOVT(fxdr_unsigned(u_int32_t, sp->sa_mode)); 1484 if (va.va_type == VNON) 1485 va.va_type = VREG; 1486 va.va_mode = nfstov_mode(sp->sa_mode); 1487 switch (va.va_type) { 1488 case VREG: 1489 tsize = fxdr_unsigned(int32_t, sp->sa_size); 1490 if (tsize != -1) 1491 va.va_size = (u_quad_t)tsize; 1492 break; 1493 case VCHR: 1494 case VBLK: 1495 case VFIFO: 1496 rdev = fxdr_unsigned(int32_t, sp->sa_size); 1497 break; 1498 default: 1499 break; 1500 }; 1501 } 1502 1503 /* 1504 * Iff doesn't exist, create it 1505 * otherwise just truncate to 0 length 1506 * should I set the mode too ?? 1507 */ 1508 if (nd.ni_vp == NULL) { 1509 if (va.va_type == VREG || va.va_type == VSOCK) { 1510 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1511 error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1512 if (!error) { 1513 vn_lock(nd.ni_vp, LK_EXCLUSIVE | LK_RETRY); 1514 if (exclusive_flag) { 1515 exclusive_flag = 0; 1516 vattr_null(&va); 1517 /* 1518 * XXX 1519 * assuming NFSX_V3CREATEVERF 1520 * == sizeof(nfstime3) 1521 */ 1522 fxdr_nfsv3time(cverf, &va.va_atime); 1523 error = VOP_SETATTR(nd.ni_vp, &va, 1524 cred); 1525 } 1526 } 1527 } else if (va.va_type == VCHR || va.va_type == VBLK || 1528 va.va_type == VFIFO) { 1529 if (va.va_type == VCHR && rdev == 0xffffffff) 1530 va.va_type = VFIFO; 1531 if (va.va_type != VFIFO && 1532 (error = kauth_authorize_system(cred, 1533 KAUTH_SYSTEM_MKNOD, 0, NULL, NULL, NULL))) { 1534 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1535 vput(nd.ni_dvp); 1536 abort = 0; 1537 nfsm_reply(0); 1538 if (nd.ni_pathbuf != NULL) { 1539 pathbuf_destroy(nd.ni_pathbuf); 1540 nd.ni_pathbuf = NULL; 1541 } 1542 return (error); 1543 } else 1544 va.va_rdev = (dev_t)rdev; 1545 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1546 error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, 1547 &va); 1548 if (!error) { 1549 vn_lock(nd.ni_vp, LK_EXCLUSIVE | LK_RETRY); 1550 } else { 1551 nfsm_reply(0); 1552 } 1553 } else { 1554 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1555 if (nd.ni_pathbuf != NULL) { 1556 pathbuf_destroy(nd.ni_pathbuf); 1557 nd.ni_pathbuf = NULL; 1558 } 1559 error = ENXIO; 1560 abort = 0; 1561 } 1562 vp = nd.ni_vp; 1563 } else { 1564 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1565 if (nd.ni_pathbuf != NULL) { 1566 pathbuf_destroy(nd.ni_pathbuf); 1567 nd.ni_pathbuf = NULL; 1568 } 1569 vp = nd.ni_vp; 1570 abort = 0; 1571 if (!error && va.va_size != -1) { 1572 error = nfsrv_access(vp, VWRITE, cred, 1573 (nd.ni_cnd.cn_flags & RDONLY), lwp, 0); 1574 if (!error) { 1575 nqsrv_getl(vp, ND_WRITE); 1576 tempsize = va.va_size; 1577 vattr_null(&va); 1578 va.va_size = tempsize; 1579 error = VOP_SETATTR(vp, &va, cred); 1580 } 1581 } 1582 if (error) 1583 vput(vp); 1584 } 1585 if (!error) { 1586 error = nfsrv_composefh(vp, &nsfh, v3); 1587 if (!error) 1588 error = VOP_GETATTR(vp, &va, cred); 1589 vput(vp); 1590 } 1591 if (nd.ni_dvp == vp) 1592 vrele(nd.ni_dvp); 1593 else 1594 vput(nd.ni_dvp); 1595 if (v3) { 1596 if (exclusive_flag && !error) { 1597 /* 1598 * XXX assuming NFSX_V3CREATEVERF == sizeof(nfstime3) 1599 */ 1600 char oldverf[NFSX_V3CREATEVERF]; 1601 1602 txdr_nfsv3time(&va.va_atime, oldverf); 1603 if (memcmp(cverf, oldverf, NFSX_V3CREATEVERF)) 1604 error = EEXIST; 1605 } 1606 if (dirp) { 1607 vn_lock(dirp, LK_SHARED | LK_RETRY); 1608 diraft_ret = VOP_GETATTR(dirp, &diraft, cred); 1609 VOP_UNLOCK(dirp); 1610 } 1611 } 1612 if (dirp) { 1613 vrele(dirp); 1614 dirp = NULL; 1615 } 1616 if (nd.ni_pathbuf != NULL) { 1617 pathbuf_destroy(nd.ni_pathbuf); 1618 nd.ni_pathbuf = NULL; 1619 } 1620 abort = 0; 1621 nfsm_reply(NFSX_SRVFH(&nsfh, v3) + NFSX_FATTR(v3) + NFSX_WCCDATA(v3)); 1622 if (v3) { 1623 if (!error) { 1624 nfsm_srvpostop_fh(&nsfh); 1625 nfsm_srvpostop_attr(0, &va); 1626 } 1627 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1628 } else { 1629 nfsm_srvfhtom(&nsfh, v3); 1630 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 1631 nfsm_srvfillattr(&va, fp); 1632 } 1633 return (0); 1634 nfsmout: 1635 if (dirp) 1636 vrele(dirp); 1637 if (abort) { 1638 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1639 if (nd.ni_dvp == nd.ni_vp) 1640 vrele(nd.ni_dvp); 1641 else 1642 vput(nd.ni_dvp); 1643 if (nd.ni_vp) 1644 vput(nd.ni_vp); 1645 } 1646 if (nd.ni_pathbuf != NULL) { 1647 pathbuf_destroy(nd.ni_pathbuf); 1648 nd.ni_pathbuf = NULL; 1649 } 1650 return (error); 1651 } 1652 1653 /* 1654 * nfs v3 mknod service 1655 */ 1656 int 1657 nfsrv_mknod(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 1658 { 1659 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1660 struct mbuf *nam = nfsd->nd_nam; 1661 char *dpos = nfsd->nd_dpos; 1662 kauth_cred_t cred = nfsd->nd_cr; 1663 struct vattr va, dirfor, diraft; 1664 u_int32_t *tl; 1665 struct nameidata nd; 1666 int32_t t1; 1667 char *bpos; 1668 int error = 0, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 1669 int abort = 0; 1670 u_int32_t major, minor; 1671 enum vtype vtyp; 1672 char *cp2; 1673 struct mbuf *mb, *mreq __unused; 1674 struct vnode *vp, *dirp = (struct vnode *)0; 1675 nfsrvfh_t nsfh; 1676 u_quad_t frev; 1677 1678 nd.ni_cnd.cn_nameiop = 0; 1679 nfsm_srvmtofh(&nsfh); 1680 nfsm_srvnamesiz(len); 1681 nd.ni_cnd.cn_cred = cred; 1682 nd.ni_cnd.cn_nameiop = CREATE; 1683 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 1684 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 1685 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 1686 if (dirp) 1687 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); 1688 if (error) { 1689 nfsm_reply(NFSX_WCCDATA(1)); 1690 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1691 if (dirp) 1692 vrele(dirp); 1693 if (nd.ni_pathbuf != NULL) { 1694 pathbuf_destroy(nd.ni_pathbuf); 1695 nd.ni_pathbuf = NULL; 1696 } 1697 return (0); 1698 } 1699 abort = 1; 1700 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1701 vtyp = nfsv3tov_type(*tl); 1702 if (vtyp != VCHR && vtyp != VBLK && vtyp != VSOCK && vtyp != VFIFO) { 1703 error = NFSERR_BADTYPE; 1704 goto abort; 1705 } 1706 vattr_null(&va); 1707 va.va_mode = 0; 1708 nfsm_srvsattr(&va); 1709 if (vtyp == VCHR || vtyp == VBLK) { 1710 dev_t rdev; 1711 1712 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1713 major = fxdr_unsigned(u_int32_t, *tl++); 1714 minor = fxdr_unsigned(u_int32_t, *tl); 1715 rdev = makedev(major, minor); 1716 if (major(rdev) != major || minor(rdev) != minor) { 1717 error = EINVAL; 1718 goto abort; 1719 } 1720 va.va_rdev = rdev; 1721 } 1722 1723 /* 1724 * Iff doesn't exist, create it. 1725 */ 1726 if (nd.ni_vp) { 1727 error = EEXIST; 1728 abort: 1729 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1730 if (nd.ni_vp) 1731 vput(nd.ni_vp); 1732 if (nd.ni_pathbuf != NULL) { 1733 pathbuf_destroy(nd.ni_pathbuf); 1734 nd.ni_pathbuf = NULL; 1735 } 1736 goto out; 1737 } 1738 va.va_type = vtyp; 1739 if (vtyp == VSOCK) { 1740 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1741 error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1742 } else { 1743 if (va.va_type != VFIFO && 1744 (error = kauth_authorize_system(cred, 1745 KAUTH_SYSTEM_MKNOD, 0, NULL, NULL, NULL))) { 1746 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1747 vput(nd.ni_dvp); 1748 goto out; 1749 } 1750 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1751 error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1752 if (error) 1753 goto out; 1754 } 1755 if (!error) { 1756 vn_lock(nd.ni_vp, LK_EXCLUSIVE | LK_RETRY); 1757 } 1758 out: 1759 vp = nd.ni_vp; 1760 if (!error) { 1761 error = nfsrv_composefh(vp, &nsfh, true); 1762 if (!error) 1763 error = VOP_GETATTR(vp, &va, cred); 1764 vput(vp); 1765 } 1766 if (nd.ni_dvp == nd.ni_vp) 1767 vrele(nd.ni_dvp); 1768 else 1769 vput(nd.ni_dvp); 1770 if (dirp) { 1771 vn_lock(dirp, LK_SHARED | LK_RETRY); 1772 diraft_ret = VOP_GETATTR(dirp, &diraft, cred); 1773 VOP_UNLOCK(dirp); 1774 vrele(dirp); 1775 dirp = NULL; 1776 } 1777 if (nd.ni_pathbuf != NULL) { 1778 pathbuf_destroy(nd.ni_pathbuf); 1779 nd.ni_pathbuf = NULL; 1780 } 1781 abort = 0; 1782 nfsm_reply(NFSX_SRVFH(&nsfh, true) + NFSX_POSTOPATTR(1) + 1783 NFSX_WCCDATA(1)); 1784 if (!error) { 1785 nfsm_srvpostop_fh(&nsfh); 1786 nfsm_srvpostop_attr(0, &va); 1787 } 1788 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1789 return (0); 1790 nfsmout: 1791 if (abort) { 1792 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1793 if (nd.ni_dvp == nd.ni_vp) 1794 vrele(nd.ni_dvp); 1795 else 1796 vput(nd.ni_dvp); 1797 if (nd.ni_vp) 1798 vput(nd.ni_vp); 1799 } 1800 if (nd.ni_pathbuf != NULL) { 1801 pathbuf_destroy(nd.ni_pathbuf); 1802 nd.ni_pathbuf = NULL; 1803 } 1804 if (dirp) 1805 vrele(dirp); 1806 return (error); 1807 } 1808 1809 /* 1810 * nfs remove service 1811 */ 1812 int 1813 nfsrv_remove(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 1814 { 1815 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1816 struct mbuf *nam = nfsd->nd_nam; 1817 char *dpos = nfsd->nd_dpos; 1818 kauth_cred_t cred = nfsd->nd_cr; 1819 struct nameidata nd; 1820 u_int32_t *tl; 1821 int32_t t1; 1822 char *bpos; 1823 int error = 0, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 1824 int v3 = (nfsd->nd_flag & ND_NFSV3); 1825 char *cp2; 1826 struct mbuf *mb, *mreq __unused; 1827 struct vnode *vp, *dirp; 1828 struct vattr dirfor, diraft; 1829 nfsrvfh_t nsfh; 1830 u_quad_t frev; 1831 1832 #ifndef nolint 1833 vp = (struct vnode *)0; 1834 #endif 1835 nfsm_srvmtofh(&nsfh); 1836 nfsm_srvnamesiz(len); 1837 nd.ni_cnd.cn_cred = cred; 1838 nd.ni_cnd.cn_nameiop = DELETE; 1839 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 1840 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 1841 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 1842 if (error == 0 && dirp && v3) { 1843 if (nd.ni_dvp == nd.ni_vp) 1844 vn_lock(dirp, LK_SHARED | LK_RETRY); 1845 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); 1846 if (nd.ni_dvp == nd.ni_vp) 1847 VOP_UNLOCK(dirp); 1848 } 1849 if (!error) { 1850 vp = nd.ni_vp; 1851 if (vp->v_type == VDIR) { 1852 error = EPERM; 1853 goto out; 1854 } 1855 /* 1856 * The root of a mounted filesystem cannot be deleted. 1857 */ 1858 if (vp->v_vflag & VV_ROOT) { 1859 error = EBUSY; 1860 } 1861 out: 1862 if (!error) { 1863 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1864 nqsrv_getl(vp, ND_WRITE); 1865 error = VOP_REMOVE(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); 1866 vput(nd.ni_dvp); 1867 } else { 1868 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1869 if (nd.ni_dvp == vp) 1870 vrele(nd.ni_dvp); 1871 else 1872 vput(nd.ni_dvp); 1873 vput(vp); 1874 } 1875 } 1876 if (nd.ni_pathbuf != NULL) { 1877 pathbuf_destroy(nd.ni_pathbuf); 1878 nd.ni_pathbuf = NULL; 1879 } 1880 if (dirp) { 1881 if (v3) { 1882 vn_lock(dirp, LK_SHARED | LK_RETRY); 1883 diraft_ret = VOP_GETATTR(dirp, &diraft, cred); 1884 VOP_UNLOCK(dirp); 1885 } 1886 vrele(dirp); 1887 } 1888 nfsm_reply(NFSX_WCCDATA(v3)); 1889 if (v3) { 1890 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1891 return (0); 1892 } 1893 nfsm_srvdone; 1894 } 1895 1896 /* 1897 * nfs rename service 1898 */ 1899 int 1900 nfsrv_rename(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 1901 { 1902 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1903 struct mbuf *nam = nfsd->nd_nam; 1904 char *dpos = nfsd->nd_dpos; 1905 kauth_cred_t cred = nfsd->nd_cr; 1906 u_int32_t *tl; 1907 int32_t t1; 1908 char *bpos; 1909 int error = 0, cache = 0, fdirfor_ret = 1, fdiraft_ret = 1; 1910 uint32_t len, len2; 1911 int tdirfor_ret = 1, tdiraft_ret = 1; 1912 int v3 = (nfsd->nd_flag & ND_NFSV3); 1913 char *cp2; 1914 struct mbuf *mb, *mreq __unused; 1915 struct nameidata fromnd, tond; 1916 struct vnode *fvp, *tvp, *tdvp; 1917 struct vnode *fdirp = NULL, *tdirp = NULL; 1918 struct mount *localfs = NULL; 1919 struct vattr fdirfor, fdiraft, tdirfor, tdiraft; 1920 nfsrvfh_t fnsfh, tnsfh; 1921 u_quad_t frev; 1922 uid_t saved_uid; 1923 1924 #ifndef nolint 1925 fvp = (struct vnode *)0; 1926 #endif 1927 fromnd.ni_cnd.cn_nameiop = 0; 1928 tond.ni_cnd.cn_nameiop = 0; 1929 nfsm_srvmtofh(&fnsfh); 1930 nfsm_srvnamesiz(len); 1931 /* 1932 * Remember our original uid so that we can reset cr_uid before 1933 * the second nfs_namei() call, in case it is remapped. 1934 */ 1935 saved_uid = kauth_cred_geteuid(cred); 1936 fromnd.ni_cnd.cn_cred = cred; 1937 fromnd.ni_cnd.cn_nameiop = DELETE; 1938 fromnd.ni_cnd.cn_flags = LOCKPARENT; 1939 error = nfs_namei(&fromnd, &fnsfh, len, slp, nam, &md, 1940 &dpos, &fdirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 1941 if (error == 0 && fdirp && v3) { 1942 if (fromnd.ni_dvp == fromnd.ni_vp) 1943 vn_lock(fdirp, LK_SHARED | LK_RETRY); 1944 fdirfor_ret = VOP_GETATTR(fdirp, &fdirfor, cred); 1945 if (fromnd.ni_dvp == fromnd.ni_vp) 1946 VOP_UNLOCK(fdirp); 1947 } 1948 if (error) { 1949 fromnd.ni_cnd.cn_nameiop = 0; 1950 nfsm_reply(2 * NFSX_WCCDATA(v3)); 1951 nfsm_srvwcc_data(fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft); 1952 nfsm_srvwcc_data(tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft); 1953 if (fdirp) 1954 vrele(fdirp); 1955 if (fromnd.ni_pathbuf != NULL) { 1956 pathbuf_destroy(fromnd.ni_pathbuf); 1957 } 1958 return (0); 1959 } 1960 if (fromnd.ni_dvp != fromnd.ni_vp) { 1961 VOP_UNLOCK(fromnd.ni_dvp); 1962 } 1963 fvp = fromnd.ni_vp; 1964 1965 localfs = fvp->v_mount; 1966 error = VFS_RENAMELOCK_ENTER(localfs); 1967 if (error) { 1968 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 1969 vrele(fromnd.ni_dvp); 1970 vrele(fvp); 1971 goto out1; 1972 } 1973 1974 /* Copied, regrettably, from vfs_syscalls.c (q.v.) */ 1975 vrele(fvp); 1976 if ((fromnd.ni_cnd.cn_namelen == 1 && 1977 fromnd.ni_cnd.cn_nameptr[0] == '.') || 1978 (fromnd.ni_cnd.cn_namelen == 2 && 1979 fromnd.ni_cnd.cn_nameptr[0] == '.' && 1980 fromnd.ni_cnd.cn_nameptr[1] == '.')) { 1981 error = EINVAL; 1982 VFS_RENAMELOCK_EXIT(localfs); 1983 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 1984 vrele(fromnd.ni_dvp); 1985 goto out1; 1986 } 1987 vn_lock(fromnd.ni_dvp, LK_EXCLUSIVE | LK_RETRY); 1988 error = relookup(fromnd.ni_dvp, &fromnd.ni_vp, &fromnd.ni_cnd, 0); 1989 if (error) { 1990 VOP_UNLOCK(fromnd.ni_dvp); 1991 VFS_RENAMELOCK_EXIT(localfs); 1992 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 1993 vrele(fromnd.ni_dvp); 1994 goto out1; 1995 } 1996 VOP_UNLOCK(fromnd.ni_vp); 1997 if (fromnd.ni_dvp != fromnd.ni_vp) 1998 VOP_UNLOCK(fromnd.ni_dvp); 1999 fvp = fromnd.ni_vp; 2000 2001 nfsm_srvmtofh(&tnsfh); 2002 if (v3) { 2003 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 2004 len2 = fxdr_unsigned(uint32_t, *tl); 2005 /* len2 will be checked by nfs_namei */ 2006 } 2007 else { 2008 /* NFSv2 */ 2009 nfsm_strsiz(len2, NFS_MAXNAMLEN); 2010 } 2011 kauth_cred_seteuid(cred, saved_uid); 2012 tond.ni_cnd.cn_cred = cred; 2013 tond.ni_cnd.cn_nameiop = RENAME; 2014 tond.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF | NOCACHE; 2015 error = nfs_namei(&tond, &tnsfh, len2, slp, nam, &md, 2016 &dpos, &tdirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 2017 if (tdirp && v3) { 2018 tdirfor_ret = VOP_GETATTR(tdirp, &tdirfor, cred); 2019 } 2020 if (error) { 2021 VFS_RENAMELOCK_EXIT(localfs); 2022 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 2023 vrele(fromnd.ni_dvp); 2024 vrele(fvp); 2025 goto out1; 2026 } 2027 tdvp = tond.ni_dvp; 2028 tvp = tond.ni_vp; 2029 if (tvp != NULL) { 2030 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 2031 if (v3) 2032 error = EEXIST; 2033 else 2034 error = EISDIR; 2035 goto out; 2036 } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 2037 if (v3) 2038 error = EEXIST; 2039 else 2040 error = ENOTDIR; 2041 goto out; 2042 } 2043 if (tvp->v_type == VDIR && tvp->v_mountedhere) { 2044 if (v3) 2045 error = EXDEV; 2046 else 2047 error = ENOTEMPTY; 2048 goto out; 2049 } 2050 } 2051 if (fvp->v_type == VDIR && fvp->v_mountedhere) { 2052 if (v3) 2053 error = EXDEV; 2054 else 2055 error = ENOTEMPTY; 2056 goto out; 2057 } 2058 if (fvp->v_mount != tdvp->v_mount) { 2059 if (v3) 2060 error = EXDEV; 2061 else 2062 error = ENOTEMPTY; 2063 goto out; 2064 } 2065 if (fvp == tdvp) { 2066 if (v3) 2067 error = EINVAL; 2068 else 2069 error = ENOTEMPTY; 2070 } 2071 /* 2072 * If source is the same as the destination (that is the 2073 * same vnode with the same name in the same directory), 2074 * then there is nothing to do. 2075 */ 2076 if (fvp == tvp && fromnd.ni_dvp == tdvp && 2077 fromnd.ni_cnd.cn_namelen == tond.ni_cnd.cn_namelen && 2078 !memcmp(fromnd.ni_cnd.cn_nameptr, tond.ni_cnd.cn_nameptr, 2079 fromnd.ni_cnd.cn_namelen)) 2080 error = -1; 2081 out: 2082 if (!error) { 2083 nqsrv_getl(fromnd.ni_dvp, ND_WRITE); 2084 nqsrv_getl(tdvp, ND_WRITE); 2085 if (tvp) { 2086 nqsrv_getl(tvp, ND_WRITE); 2087 } 2088 error = VOP_RENAME(fromnd.ni_dvp, fromnd.ni_vp, &fromnd.ni_cnd, 2089 tond.ni_dvp, tond.ni_vp, &tond.ni_cnd); 2090 VFS_RENAMELOCK_EXIT(localfs); 2091 } else { 2092 VOP_ABORTOP(tond.ni_dvp, &tond.ni_cnd); 2093 if (tdvp == tvp) 2094 vrele(tdvp); 2095 else 2096 vput(tdvp); 2097 if (tvp) 2098 vput(tvp); 2099 VFS_RENAMELOCK_EXIT(localfs); 2100 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 2101 vrele(fromnd.ni_dvp); 2102 vrele(fvp); 2103 if (error == -1) 2104 error = 0; 2105 } 2106 if (tond.ni_pathbuf != NULL) { 2107 pathbuf_destroy(tond.ni_pathbuf); 2108 tond.ni_pathbuf = NULL; 2109 } 2110 tond.ni_cnd.cn_nameiop = 0; 2111 out1: 2112 if (fdirp) { 2113 if (v3) { 2114 vn_lock(fdirp, LK_SHARED | LK_RETRY); 2115 fdiraft_ret = VOP_GETATTR(fdirp, &fdiraft, cred); 2116 VOP_UNLOCK(fdirp); 2117 } 2118 vrele(fdirp); 2119 fdirp = NULL; 2120 } 2121 if (tdirp) { 2122 if (v3) { 2123 vn_lock(tdirp, LK_SHARED | LK_RETRY); 2124 tdiraft_ret = VOP_GETATTR(tdirp, &tdiraft, cred); 2125 VOP_UNLOCK(tdirp); 2126 } 2127 vrele(tdirp); 2128 tdirp = NULL; 2129 } 2130 pathbuf_destroy(fromnd.ni_pathbuf); 2131 fromnd.ni_pathbuf = NULL; 2132 fromnd.ni_cnd.cn_nameiop = 0; 2133 localfs = NULL; 2134 nfsm_reply(2 * NFSX_WCCDATA(v3)); 2135 if (v3) { 2136 nfsm_srvwcc_data(fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft); 2137 nfsm_srvwcc_data(tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft); 2138 } 2139 return (0); 2140 2141 nfsmout: 2142 if (fdirp) 2143 vrele(fdirp); 2144 #ifdef notdef 2145 if (tdirp) 2146 vrele(tdirp); 2147 #endif 2148 if (tond.ni_cnd.cn_nameiop) { 2149 if (tond.ni_pathbuf != NULL) { 2150 pathbuf_destroy(tond.ni_pathbuf); 2151 tond.ni_pathbuf = NULL; 2152 } 2153 } 2154 if (localfs) { 2155 VFS_RENAMELOCK_EXIT(localfs); 2156 } 2157 if (fromnd.ni_cnd.cn_nameiop) { 2158 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 2159 if (fromnd.ni_pathbuf != NULL) { 2160 pathbuf_destroy(fromnd.ni_pathbuf); 2161 fromnd.ni_pathbuf = NULL; 2162 } 2163 vrele(fromnd.ni_dvp); 2164 vrele(fvp); 2165 } 2166 return (error); 2167 } 2168 2169 /* 2170 * nfs link service 2171 */ 2172 int 2173 nfsrv_link(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 2174 { 2175 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2176 struct mbuf *nam = nfsd->nd_nam; 2177 char *dpos = nfsd->nd_dpos; 2178 kauth_cred_t cred = nfsd->nd_cr; 2179 struct nameidata nd; 2180 u_int32_t *tl; 2181 int32_t t1; 2182 char *bpos; 2183 int error = 0, rdonly, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 2184 int getret = 1, v3 = (nfsd->nd_flag & ND_NFSV3); 2185 char *cp2; 2186 struct mbuf *mb, *mreq __unused; 2187 struct vnode *vp, *xp, *dirp = (struct vnode *)0; 2188 struct vattr dirfor, diraft, at; 2189 nfsrvfh_t nsfh, dnsfh; 2190 u_quad_t frev; 2191 2192 nfsm_srvmtofh(&nsfh); 2193 nfsm_srvmtofh(&dnsfh); 2194 nfsm_srvnamesiz(len); 2195 error = nfsrv_fhtovp(&nsfh, false, &vp, cred, slp, nam, 2196 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 2197 if (error) { 2198 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2199 nfsm_srvpostop_attr(getret, &at); 2200 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2201 return (0); 2202 } 2203 if (vp->v_type == VDIR) { 2204 error = EPERM; 2205 goto out1; 2206 } 2207 nd.ni_cnd.cn_cred = cred; 2208 nd.ni_cnd.cn_nameiop = CREATE; 2209 nd.ni_cnd.cn_flags = LOCKPARENT; 2210 error = nfs_namei(&nd, &dnsfh, len, slp, nam, &md, &dpos, 2211 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 2212 if (dirp && v3) { 2213 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); 2214 } 2215 if (error) 2216 goto out1; 2217 xp = nd.ni_vp; 2218 if (xp != NULL) { 2219 error = EEXIST; 2220 goto out; 2221 } 2222 xp = nd.ni_dvp; 2223 if (vp->v_mount != xp->v_mount) 2224 error = EXDEV; 2225 out: 2226 if (!error) { 2227 nqsrv_getl(vp, ND_WRITE); 2228 nqsrv_getl(xp, ND_WRITE); 2229 error = VOP_LINK(nd.ni_dvp, vp, &nd.ni_cnd); 2230 if (nd.ni_dvp != nd.ni_vp) 2231 VOP_UNLOCK(nd.ni_dvp); 2232 vrele(nd.ni_dvp); 2233 } else { 2234 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2235 if (nd.ni_dvp == nd.ni_vp) 2236 vrele(nd.ni_dvp); 2237 else 2238 vput(nd.ni_dvp); 2239 if (nd.ni_vp) 2240 vrele(nd.ni_vp); 2241 } 2242 out1: 2243 if (v3) { 2244 vn_lock(vp, LK_SHARED | LK_RETRY); 2245 getret = VOP_GETATTR(vp, &at, cred); 2246 VOP_UNLOCK(vp); 2247 } 2248 if (dirp) { 2249 if (v3) { 2250 vn_lock(dirp, LK_SHARED | LK_RETRY); 2251 diraft_ret = VOP_GETATTR(dirp, &diraft, cred); 2252 VOP_UNLOCK(dirp); 2253 } 2254 vrele(dirp); 2255 } 2256 vrele(vp); 2257 if (nd.ni_pathbuf != NULL) { 2258 pathbuf_destroy(nd.ni_pathbuf); 2259 nd.ni_pathbuf = NULL; 2260 } 2261 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2262 if (v3) { 2263 nfsm_srvpostop_attr(getret, &at); 2264 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2265 return (0); 2266 } 2267 nfsm_srvdone; 2268 } 2269 2270 /* 2271 * nfs symbolic link service 2272 */ 2273 int 2274 nfsrv_symlink(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 2275 { 2276 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2277 struct mbuf *nam = nfsd->nd_nam; 2278 char *dpos = nfsd->nd_dpos; 2279 kauth_cred_t cred = nfsd->nd_cr; 2280 struct vattr va, dirfor, diraft; 2281 struct nameidata nd; 2282 u_int32_t *tl; 2283 int32_t t1; 2284 struct nfsv2_sattr *sp; 2285 char *bpos, *pathcp = NULL, *cp2; 2286 struct uio io; 2287 struct iovec iv; 2288 int error = 0, cache = 0, dirfor_ret = 1, diraft_ret = 1, abort = 0; 2289 uint32_t len, len2; 2290 int v3 = (nfsd->nd_flag & ND_NFSV3); 2291 struct mbuf *mb, *mreq __unused; 2292 struct vnode *dirp = (struct vnode *)0; 2293 nfsrvfh_t nsfh; 2294 u_quad_t frev; 2295 2296 nd.ni_cnd.cn_nameiop = 0; 2297 nfsm_srvmtofh(&nsfh); 2298 nfsm_srvnamesiz(len); 2299 nd.ni_cnd.cn_cred = cred; 2300 nd.ni_cnd.cn_nameiop = CREATE; 2301 nd.ni_cnd.cn_flags = LOCKPARENT; 2302 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 2303 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 2304 if (dirp && v3) { 2305 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); 2306 } 2307 if (error) 2308 goto out; 2309 abort = 1; 2310 vattr_null(&va); 2311 va.va_type = VLNK; 2312 if (v3) { 2313 va.va_mode = 0; 2314 nfsm_srvsattr(&va); 2315 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 2316 len2 = fxdr_unsigned(uint32_t, *tl); 2317 if (len2 > PATH_MAX) { 2318 /* XXX should check _PC_NO_TRUNC */ 2319 error = ENAMETOOLONG; 2320 goto abortop; 2321 } 2322 } 2323 else { 2324 /* NFSv2 */ 2325 nfsm_strsiz(len2, NFS_MAXPATHLEN); 2326 } 2327 pathcp = malloc(len2 + 1, M_TEMP, M_WAITOK); 2328 iv.iov_base = pathcp; 2329 iv.iov_len = len2; 2330 io.uio_resid = len2; 2331 io.uio_offset = 0; 2332 io.uio_iov = &iv; 2333 io.uio_iovcnt = 1; 2334 io.uio_rw = UIO_READ; 2335 UIO_SETUP_SYSSPACE(&io); 2336 nfsm_mtouio(&io, len2); 2337 if (!v3) { 2338 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2339 va.va_mode = fxdr_unsigned(u_int16_t, sp->sa_mode); 2340 } 2341 *(pathcp + len2) = '\0'; 2342 if (nd.ni_vp) { 2343 error = EEXIST; 2344 abortop: 2345 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2346 if (nd.ni_dvp == nd.ni_vp) 2347 vrele(nd.ni_dvp); 2348 else 2349 vput(nd.ni_dvp); 2350 if (nd.ni_vp) 2351 vrele(nd.ni_vp); 2352 goto out; 2353 } 2354 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2355 error = VOP_SYMLINK(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va, pathcp); 2356 if (!error) { 2357 if (v3) { 2358 vn_lock(nd.ni_vp, LK_SHARED | LK_RETRY); 2359 error = nfsrv_composefh(nd.ni_vp, &nsfh, v3); 2360 if (!error) 2361 error = VOP_GETATTR(nd.ni_vp, &va, cred); 2362 vput(nd.ni_vp); 2363 } else { 2364 vrele(nd.ni_vp); 2365 } 2366 } 2367 vput(nd.ni_dvp); 2368 out: 2369 if (pathcp) 2370 free(pathcp, M_TEMP); 2371 if (dirp) { 2372 if (v3) { 2373 vn_lock(dirp, LK_SHARED | LK_RETRY); 2374 diraft_ret = VOP_GETATTR(dirp, &diraft, cred); 2375 VOP_UNLOCK(dirp); 2376 } 2377 vrele(dirp); 2378 dirp = NULL; 2379 } 2380 if (nd.ni_pathbuf != NULL) { 2381 pathbuf_destroy(nd.ni_pathbuf); 2382 nd.ni_pathbuf = NULL; 2383 } 2384 abort = 0; 2385 nfsm_reply(NFSX_SRVFH(&nsfh, v3) + NFSX_POSTOPATTR(v3) + 2386 NFSX_WCCDATA(v3)); 2387 if (v3) { 2388 if (!error) { 2389 nfsm_srvpostop_fh(&nsfh); 2390 nfsm_srvpostop_attr(0, &va); 2391 } 2392 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2393 } 2394 return (0); 2395 nfsmout: 2396 if (abort) { 2397 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2398 if (nd.ni_dvp == nd.ni_vp) 2399 vrele(nd.ni_dvp); 2400 else 2401 vput(nd.ni_dvp); 2402 if (nd.ni_vp) 2403 vrele(nd.ni_vp); 2404 if (nd.ni_pathbuf != NULL) { 2405 pathbuf_destroy(nd.ni_pathbuf); 2406 nd.ni_pathbuf = NULL; 2407 } 2408 } 2409 if (dirp) 2410 vrele(dirp); 2411 if (pathcp) 2412 free(pathcp, M_TEMP); 2413 return (error); 2414 } 2415 2416 /* 2417 * nfs mkdir service 2418 */ 2419 int 2420 nfsrv_mkdir(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 2421 { 2422 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2423 struct mbuf *nam = nfsd->nd_nam; 2424 char *dpos = nfsd->nd_dpos; 2425 kauth_cred_t cred = nfsd->nd_cr; 2426 struct vattr va, dirfor, diraft; 2427 struct nfs_fattr *fp; 2428 struct nameidata nd; 2429 char *cp; 2430 u_int32_t *tl; 2431 int32_t t1; 2432 char *bpos; 2433 int error = 0, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 2434 int abort = 0; 2435 int v3 = (nfsd->nd_flag & ND_NFSV3); 2436 char *cp2; 2437 struct mbuf *mb, *mreq __unused; 2438 struct vnode *vp, *dirp = (struct vnode *)0; 2439 nfsrvfh_t nsfh; 2440 u_quad_t frev; 2441 2442 nfsm_srvmtofh(&nsfh); 2443 nfsm_srvnamesiz(len); 2444 nd.ni_cnd.cn_cred = cred; 2445 nd.ni_cnd.cn_nameiop = CREATE; 2446 nd.ni_cnd.cn_flags = LOCKPARENT; 2447 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 2448 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 2449 if (dirp && v3) { 2450 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); 2451 } 2452 if (error) { 2453 if (nd.ni_pathbuf != NULL) { 2454 pathbuf_destroy(nd.ni_pathbuf); 2455 nd.ni_pathbuf = NULL; 2456 } 2457 nfsm_reply(NFSX_WCCDATA(v3)); 2458 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2459 if (dirp) 2460 vrele(dirp); 2461 return (0); 2462 } 2463 abort = 1; 2464 vattr_null(&va); 2465 if (v3) { 2466 va.va_mode = 0; 2467 nfsm_srvsattr(&va); 2468 } else { 2469 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2470 va.va_mode = nfstov_mode(*tl++); 2471 } 2472 va.va_type = VDIR; 2473 vp = nd.ni_vp; 2474 if (vp != NULL) { 2475 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2476 if (nd.ni_dvp == vp) 2477 vrele(nd.ni_dvp); 2478 else 2479 vput(nd.ni_dvp); 2480 vrele(vp); 2481 error = EEXIST; 2482 goto out; 2483 } 2484 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2485 error = VOP_MKDIR(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 2486 if (!error) { 2487 vp = nd.ni_vp; 2488 vn_lock(vp, LK_SHARED | LK_RETRY); 2489 error = nfsrv_composefh(vp, &nsfh, v3); 2490 if (!error) 2491 error = VOP_GETATTR(vp, &va, cred); 2492 vput(vp); 2493 } 2494 vput(nd.ni_dvp); 2495 out: 2496 if (dirp) { 2497 if (v3) { 2498 vn_lock(dirp, LK_SHARED | LK_RETRY); 2499 diraft_ret = VOP_GETATTR(dirp, &diraft, cred); 2500 VOP_UNLOCK(dirp); 2501 } 2502 vrele(dirp); 2503 dirp = NULL; 2504 } 2505 if (nd.ni_pathbuf != NULL) { 2506 pathbuf_destroy(nd.ni_pathbuf); 2507 nd.ni_pathbuf = NULL; 2508 } 2509 abort = 0; 2510 nfsm_reply(NFSX_SRVFH(&nsfh, v3) + NFSX_POSTOPATTR(v3) + 2511 NFSX_WCCDATA(v3)); 2512 if (v3) { 2513 if (!error) { 2514 nfsm_srvpostop_fh(&nsfh); 2515 nfsm_srvpostop_attr(0, &va); 2516 } 2517 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2518 } else { 2519 nfsm_srvfhtom(&nsfh, v3); 2520 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 2521 nfsm_srvfillattr(&va, fp); 2522 } 2523 return (0); 2524 nfsmout: 2525 if (abort) { 2526 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2527 if (nd.ni_dvp == nd.ni_vp) 2528 vrele(nd.ni_dvp); 2529 else 2530 vput(nd.ni_dvp); 2531 if (nd.ni_vp) 2532 vrele(nd.ni_vp); 2533 if (nd.ni_pathbuf != NULL) { 2534 pathbuf_destroy(nd.ni_pathbuf); 2535 nd.ni_pathbuf = NULL; 2536 } 2537 } 2538 if (dirp) 2539 vrele(dirp); 2540 return (error); 2541 } 2542 2543 /* 2544 * nfs rmdir service 2545 */ 2546 int 2547 nfsrv_rmdir(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 2548 { 2549 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2550 struct mbuf *nam = nfsd->nd_nam; 2551 char *dpos = nfsd->nd_dpos; 2552 kauth_cred_t cred = nfsd->nd_cr; 2553 u_int32_t *tl; 2554 int32_t t1; 2555 char *bpos; 2556 int error = 0, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 2557 int v3 = (nfsd->nd_flag & ND_NFSV3); 2558 char *cp2; 2559 struct mbuf *mb, *mreq __unused; 2560 struct vnode *vp, *dirp = (struct vnode *)0; 2561 struct vattr dirfor, diraft; 2562 nfsrvfh_t nsfh; 2563 struct nameidata nd; 2564 u_quad_t frev; 2565 2566 nfsm_srvmtofh(&nsfh); 2567 nfsm_srvnamesiz(len); 2568 nd.ni_cnd.cn_cred = cred; 2569 nd.ni_cnd.cn_nameiop = DELETE; 2570 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 2571 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 2572 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 2573 if (dirp && v3) { 2574 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); 2575 } 2576 if (error) { 2577 if (nd.ni_pathbuf != NULL) { 2578 pathbuf_destroy(nd.ni_pathbuf); 2579 nd.ni_pathbuf = NULL; 2580 } 2581 nfsm_reply(NFSX_WCCDATA(v3)); 2582 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2583 if (dirp) 2584 vrele(dirp); 2585 return (0); 2586 } 2587 vp = nd.ni_vp; 2588 if (vp->v_type != VDIR) { 2589 error = ENOTDIR; 2590 goto out; 2591 } 2592 /* 2593 * No rmdir "." please. 2594 */ 2595 if (nd.ni_dvp == vp) { 2596 error = EINVAL; 2597 goto out; 2598 } 2599 /* 2600 * The root of a mounted filesystem cannot be deleted. 2601 */ 2602 if (vp->v_vflag & VV_ROOT) 2603 error = EBUSY; 2604 out: 2605 if (!error) { 2606 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2607 nqsrv_getl(vp, ND_WRITE); 2608 error = VOP_RMDIR(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); 2609 vput(nd.ni_dvp); 2610 } else { 2611 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2612 if (nd.ni_dvp == nd.ni_vp) 2613 vrele(nd.ni_dvp); 2614 else 2615 vput(nd.ni_dvp); 2616 vput(vp); 2617 } 2618 if (nd.ni_pathbuf != NULL) { 2619 pathbuf_destroy(nd.ni_pathbuf); 2620 nd.ni_pathbuf = NULL; 2621 } 2622 if (dirp) { 2623 if (v3) { 2624 vn_lock(dirp, LK_SHARED | LK_RETRY); 2625 diraft_ret = VOP_GETATTR(dirp, &diraft, cred); 2626 VOP_UNLOCK(dirp); 2627 } 2628 vrele(dirp); 2629 } 2630 nfsm_reply(NFSX_WCCDATA(v3)); 2631 if (v3) { 2632 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2633 return (0); 2634 } 2635 nfsm_srvdone; 2636 } 2637 2638 /* 2639 * nfs readdir service 2640 * - mallocs what it thinks is enough to read 2641 * count rounded up to a multiple of NFS_SRVDIRBLKSIZ <= NFS_MAXREADDIR 2642 * - calls VOP_READDIR() 2643 * - loops around building the reply 2644 * if the output generated exceeds count break out of loop 2645 * The nfsm_clget macro is used here so that the reply will be packed 2646 * tightly in mbuf clusters. 2647 * - it only knows that it has encountered eof when the VOP_READDIR() 2648 * reads nothing 2649 * - as such one readdir rpc will return eof false although you are there 2650 * and then the next will return eof 2651 * - it trims out records with d_fileno == 0 2652 * this doesn't matter for Unix clients, but they might confuse clients 2653 * for other os'. 2654 * - it trims out records with d_type == DT_WHT 2655 * these cannot be seen through NFS (unless we extend the protocol) 2656 * NB: It is tempting to set eof to true if the VOP_READDIR() reads less 2657 * than requested, but this may not apply to all filesystems. For 2658 * example, client NFS does not { although it is never remote mounted 2659 * anyhow } 2660 * The alternate call nfsrv_readdirplus() does lookups as well. 2661 * PS: The NFS protocol spec. does not clarify what the "count" byte 2662 * argument is a count of.. just name strings and file id's or the 2663 * entire reply rpc or ... 2664 * I tried just file name and id sizes and it confused the Sun client, 2665 * so I am using the full rpc size now. The "paranoia.." comment refers 2666 * to including the status longwords that are not a part of the dir. 2667 * "entry" structures, but are in the rpc. 2668 */ 2669 2670 #define NFS_SRVDIRBLKSIZ 1024 2671 2672 struct flrep { 2673 nfsuint64 fl_off; 2674 u_int32_t fl_postopok; 2675 struct nfs_fattr fl_fattr; /* XXX: must be of fattr3 size */ 2676 u_int32_t fl_fhok; 2677 u_int32_t fl_fhsize; 2678 /* handle comes here, filled in dynamically */ 2679 }; 2680 2681 int 2682 nfsrv_readdir(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 2683 { 2684 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2685 struct mbuf *nam = nfsd->nd_nam; 2686 char *dpos = nfsd->nd_dpos; 2687 kauth_cred_t cred = nfsd->nd_cr; 2688 char *bp, *be; 2689 struct mbuf *mp; 2690 struct dirent *dp; 2691 char *cp; 2692 u_int32_t *tl; 2693 int32_t t1; 2694 char *bpos; 2695 struct mbuf *mb, *mreq __unused, *mp2; 2696 char *cpos, *cend, *cp2, *rbuf; 2697 struct vnode *vp; 2698 struct vattr at; 2699 nfsrvfh_t nsfh; 2700 struct uio io; 2701 struct iovec iv; 2702 int len, nlen, rem, xfer, tsiz, i, error = 0, getret = 1; 2703 int siz, cnt, fullsiz, eofflag, rdonly, cache = 0, ncookies; 2704 int v3 = (nfsd->nd_flag & ND_NFSV3); 2705 u_quad_t frev, off, toff; 2706 #ifdef NFS3_STRICTVERF 2707 u_quad_t verf; 2708 #endif 2709 off_t *cookies = NULL, *cookiep; 2710 nfsuint64 jar; 2711 2712 nfsm_srvmtofh(&nsfh); 2713 if (v3) { 2714 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 2715 toff = fxdr_hyper(tl); 2716 tl += 2; 2717 #ifdef NFS3_STRICTVERF 2718 verf = fxdr_hyper(tl); 2719 #endif 2720 tl += 2; 2721 } else { 2722 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2723 toff = fxdr_unsigned(u_quad_t, *tl++); 2724 } 2725 off = toff; 2726 cnt = fxdr_unsigned(int, *tl); 2727 siz = ((cnt + NFS_SRVDIRBLKSIZ - 1) & ~(NFS_SRVDIRBLKSIZ - 1)); 2728 xfer = NFS_SRVMAXDATA(nfsd); 2729 if (siz > xfer) 2730 siz = xfer; 2731 fullsiz = siz; 2732 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 2733 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 2734 if (!error && vp->v_type != VDIR) { 2735 error = ENOTDIR; 2736 vput(vp); 2737 } 2738 if (error) { 2739 nfsm_reply(NFSX_UNSIGNED); 2740 nfsm_srvpostop_attr(getret, &at); 2741 return (0); 2742 } 2743 nqsrv_getl(vp, ND_READ); 2744 if (v3) { 2745 error = getret = VOP_GETATTR(vp, &at, cred); 2746 #ifdef NFS3_STRICTVERF 2747 /* 2748 * XXX This check is too strict for Solaris 2.5 clients. 2749 */ 2750 if (!error && toff && verf != at.va_filerev) 2751 error = NFSERR_BAD_COOKIE; 2752 #endif 2753 } 2754 if (!error) 2755 error = nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 0); 2756 if (error) { 2757 vput(vp); 2758 nfsm_reply(NFSX_POSTOPATTR(v3)); 2759 nfsm_srvpostop_attr(getret, &at); 2760 return (0); 2761 } 2762 VOP_UNLOCK(vp); 2763 rbuf = malloc(siz, M_TEMP, M_WAITOK); 2764 again: 2765 iv.iov_base = rbuf; 2766 iv.iov_len = fullsiz; 2767 io.uio_iov = &iv; 2768 io.uio_iovcnt = 1; 2769 io.uio_offset = (off_t)off; 2770 io.uio_resid = fullsiz; 2771 io.uio_rw = UIO_READ; 2772 UIO_SETUP_SYSSPACE(&io); 2773 eofflag = 0; 2774 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2775 2776 error = VOP_READDIR(vp, &io, cred, &eofflag, &cookies, &ncookies); 2777 2778 off = (off_t)io.uio_offset; 2779 if (!cookies && !error) 2780 error = NFSERR_PERM; 2781 if (v3) { 2782 getret = VOP_GETATTR(vp, &at, cred); 2783 if (!error) 2784 error = getret; 2785 } 2786 2787 VOP_UNLOCK(vp); 2788 if (error) { 2789 vrele(vp); 2790 free((void *)rbuf, M_TEMP); 2791 if (cookies) 2792 free((void *)cookies, M_TEMP); 2793 nfsm_reply(NFSX_POSTOPATTR(v3)); 2794 nfsm_srvpostop_attr(getret, &at); 2795 return (0); 2796 } 2797 if (io.uio_resid) { 2798 siz -= io.uio_resid; 2799 2800 /* 2801 * If nothing read, return eof 2802 * rpc reply 2803 */ 2804 if (siz == 0) { 2805 vrele(vp); 2806 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_COOKIEVERF(v3) + 2807 2 * NFSX_UNSIGNED); 2808 if (v3) { 2809 nfsm_srvpostop_attr(getret, &at); 2810 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 2811 txdr_hyper(at.va_filerev, tl); 2812 tl += 2; 2813 } else 2814 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2815 *tl++ = nfs_false; 2816 *tl = nfs_true; 2817 free((void *)rbuf, M_TEMP); 2818 free((void *)cookies, M_TEMP); 2819 return (0); 2820 } 2821 } 2822 2823 /* 2824 * Check for degenerate cases of nothing useful read. 2825 * If so go try again 2826 */ 2827 cpos = rbuf; 2828 cend = rbuf + siz; 2829 dp = (struct dirent *)cpos; 2830 cookiep = cookies; 2831 2832 while (cpos < cend && ncookies > 0 && 2833 (dp->d_fileno == 0 || dp->d_type == DT_WHT)) { 2834 cpos += dp->d_reclen; 2835 dp = (struct dirent *)cpos; 2836 cookiep++; 2837 ncookies--; 2838 } 2839 if (cpos >= cend || ncookies == 0) { 2840 toff = off; 2841 siz = fullsiz; 2842 free(cookies, M_TEMP); 2843 cookies = NULL; 2844 goto again; 2845 } 2846 2847 len = 3 * NFSX_UNSIGNED; /* paranoia, probably can be 0 */ 2848 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_COOKIEVERF(v3) + siz); 2849 if (v3) { 2850 nfsm_srvpostop_attr(getret, &at); 2851 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2852 txdr_hyper(at.va_filerev, tl); 2853 } 2854 mp = mp2 = mb; 2855 bp = bpos; 2856 be = bp + M_TRAILINGSPACE(mp); 2857 2858 /* Loop through the records and build reply */ 2859 while (cpos < cend && ncookies > 0) { 2860 if (dp->d_fileno != 0 && dp->d_type != DT_WHT) { 2861 nlen = dp->d_namlen; 2862 rem = nfsm_rndup(nlen)-nlen; 2863 len += (4 * NFSX_UNSIGNED + nlen + rem); 2864 if (v3) 2865 len += 2 * NFSX_UNSIGNED; 2866 if (len > cnt) { 2867 eofflag = 0; 2868 break; 2869 } 2870 /* 2871 * Build the directory record xdr from 2872 * the dirent entry. 2873 */ 2874 nfsm_clget; 2875 *tl = nfs_true; 2876 bp += NFSX_UNSIGNED; 2877 if (v3) { 2878 nfsm_clget; 2879 *tl = txdr_unsigned(dp->d_fileno >> 32); 2880 bp += NFSX_UNSIGNED; 2881 } 2882 nfsm_clget; 2883 *tl = txdr_unsigned(dp->d_fileno); 2884 bp += NFSX_UNSIGNED; 2885 nfsm_clget; 2886 *tl = txdr_unsigned(nlen); 2887 bp += NFSX_UNSIGNED; 2888 2889 /* And loop around copying the name */ 2890 xfer = nlen; 2891 cp = dp->d_name; 2892 while (xfer > 0) { 2893 nfsm_clget; 2894 if ((bp+xfer) > be) 2895 tsiz = be-bp; 2896 else 2897 tsiz = xfer; 2898 memcpy(bp, cp, tsiz); 2899 bp += tsiz; 2900 xfer -= tsiz; 2901 if (xfer > 0) 2902 cp += tsiz; 2903 } 2904 /* And null pad to an int32_t boundary */ 2905 for (i = 0; i < rem; i++) 2906 *bp++ = '\0'; 2907 nfsm_clget; 2908 2909 /* Finish off the record */ 2910 txdr_hyper(*cookiep, &jar); 2911 if (v3) { 2912 *tl = jar.nfsuquad[0]; 2913 bp += NFSX_UNSIGNED; 2914 nfsm_clget; 2915 } 2916 *tl = jar.nfsuquad[1]; 2917 bp += NFSX_UNSIGNED; 2918 } 2919 cpos += dp->d_reclen; 2920 dp = (struct dirent *)cpos; 2921 cookiep++; 2922 ncookies--; 2923 } 2924 vrele(vp); 2925 nfsm_clget; 2926 *tl = nfs_false; 2927 bp += NFSX_UNSIGNED; 2928 nfsm_clget; 2929 if (eofflag) 2930 *tl = nfs_true; 2931 else 2932 *tl = nfs_false; 2933 bp += NFSX_UNSIGNED; 2934 if (mp != mb) { 2935 if (bp < be) 2936 mp->m_len = bp - mtod(mp, char *); 2937 } else 2938 mp->m_len += bp - bpos; 2939 free((void *)rbuf, M_TEMP); 2940 free((void *)cookies, M_TEMP); 2941 nfsm_srvdone; 2942 } 2943 2944 int 2945 nfsrv_readdirplus(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 2946 { 2947 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2948 struct mbuf *nam = nfsd->nd_nam; 2949 char *dpos = nfsd->nd_dpos; 2950 kauth_cred_t cred = nfsd->nd_cr; 2951 char *bp, *be; 2952 struct mbuf *mp; 2953 struct dirent *dp; 2954 char *cp; 2955 u_int32_t *tl; 2956 int32_t t1; 2957 char *bpos; 2958 struct mbuf *mb, *mreq __unused, *mp2; 2959 char *cpos, *cend, *cp2, *rbuf; 2960 struct vnode *vp, *nvp; 2961 struct flrep fl; 2962 nfsrvfh_t nsfh; 2963 struct uio io; 2964 struct iovec iv; 2965 struct vattr va, at, *vap = &va; 2966 struct nfs_fattr *fp; 2967 int len, nlen, rem, xfer, tsiz, i, error = 0, getret = 1; 2968 int siz, cnt, fullsiz, eofflag, rdonly, cache = 0, dirlen, ncookies; 2969 u_quad_t frev, off, toff; 2970 #ifdef NFS3_STRICTVERF 2971 u_quad_t verf; 2972 #endif 2973 off_t *cookies = NULL, *cookiep; 2974 2975 nfsm_srvmtofh(&nsfh); 2976 nfsm_dissect(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 2977 toff = fxdr_hyper(tl); 2978 tl += 2; 2979 #ifdef NFS3_STRICTVERF 2980 verf = fxdr_hyper(tl); 2981 #endif 2982 tl += 2; 2983 siz = fxdr_unsigned(int, *tl++); 2984 cnt = fxdr_unsigned(int, *tl); 2985 off = toff; 2986 siz = ((siz + NFS_SRVDIRBLKSIZ - 1) & ~(NFS_SRVDIRBLKSIZ - 1)); 2987 xfer = NFS_SRVMAXDATA(nfsd); 2988 if (siz > xfer) 2989 siz = xfer; 2990 fullsiz = siz; 2991 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 2992 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 2993 if (!error && vp->v_type != VDIR) { 2994 error = ENOTDIR; 2995 vput(vp); 2996 } 2997 if (error) { 2998 nfsm_reply(NFSX_UNSIGNED); 2999 nfsm_srvpostop_attr(getret, &at); 3000 return (0); 3001 } 3002 error = getret = VOP_GETATTR(vp, &at, cred); 3003 #ifdef NFS3_STRICTVERF 3004 /* 3005 * XXX This check is too strict for Solaris 2.5 clients. 3006 */ 3007 if (!error && toff && verf != at.va_filerev) 3008 error = NFSERR_BAD_COOKIE; 3009 #endif 3010 if (!error) { 3011 nqsrv_getl(vp, ND_READ); 3012 error = nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 0); 3013 } 3014 if (error) { 3015 vput(vp); 3016 nfsm_reply(NFSX_V3POSTOPATTR); 3017 nfsm_srvpostop_attr(getret, &at); 3018 return (0); 3019 } 3020 VOP_UNLOCK(vp); 3021 3022 rbuf = malloc(siz, M_TEMP, M_WAITOK); 3023 again: 3024 iv.iov_base = rbuf; 3025 iv.iov_len = fullsiz; 3026 io.uio_iov = &iv; 3027 io.uio_iovcnt = 1; 3028 io.uio_offset = (off_t)off; 3029 io.uio_resid = fullsiz; 3030 io.uio_rw = UIO_READ; 3031 UIO_SETUP_SYSSPACE(&io); 3032 eofflag = 0; 3033 3034 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 3035 3036 error = VOP_READDIR(vp, &io, cred, &eofflag, &cookies, &ncookies); 3037 3038 off = (u_quad_t)io.uio_offset; 3039 getret = VOP_GETATTR(vp, &at, cred); 3040 3041 VOP_UNLOCK(vp); 3042 3043 /* 3044 * If the VGET operation doesn't work for this filesystem, 3045 * we can't support readdirplus. Returning NOTSUPP should 3046 * make clients fall back to plain readdir. 3047 * There's no need to check for VPTOFH as well, we wouldn't 3048 * even be here otherwise. 3049 */ 3050 if (!getret) { 3051 if ((getret = VFS_VGET(vp->v_mount, at.va_fileid, &nvp))) 3052 getret = (getret == EOPNOTSUPP) ? 3053 NFSERR_NOTSUPP : NFSERR_IO; 3054 else 3055 vput(nvp); 3056 } 3057 3058 if (!cookies && !error) 3059 error = NFSERR_PERM; 3060 if (!error) 3061 error = getret; 3062 if (error) { 3063 vrele(vp); 3064 if (cookies) 3065 free((void *)cookies, M_TEMP); 3066 free((void *)rbuf, M_TEMP); 3067 nfsm_reply(NFSX_V3POSTOPATTR); 3068 nfsm_srvpostop_attr(getret, &at); 3069 return (0); 3070 } 3071 if (io.uio_resid) { 3072 siz -= io.uio_resid; 3073 3074 /* 3075 * If nothing read, return eof 3076 * rpc reply 3077 */ 3078 if (siz == 0) { 3079 vrele(vp); 3080 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF + 3081 2 * NFSX_UNSIGNED); 3082 nfsm_srvpostop_attr(getret, &at); 3083 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 3084 txdr_hyper(at.va_filerev, tl); 3085 tl += 2; 3086 *tl++ = nfs_false; 3087 *tl = nfs_true; 3088 free((void *)cookies, M_TEMP); 3089 free((void *)rbuf, M_TEMP); 3090 return (0); 3091 } 3092 } 3093 3094 /* 3095 * Check for degenerate cases of nothing useful read. 3096 * If so go try again 3097 */ 3098 cpos = rbuf; 3099 cend = rbuf + siz; 3100 dp = (struct dirent *)cpos; 3101 cookiep = cookies; 3102 3103 while (cpos < cend && ncookies > 0 && 3104 (dp->d_fileno == 0 || dp->d_type == DT_WHT)) { 3105 cpos += dp->d_reclen; 3106 dp = (struct dirent *)cpos; 3107 cookiep++; 3108 ncookies--; 3109 } 3110 if (cpos >= cend || ncookies == 0) { 3111 toff = off; 3112 siz = fullsiz; 3113 free(cookies, M_TEMP); 3114 cookies = NULL; 3115 goto again; 3116 } 3117 3118 dirlen = len = NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF + 2 * NFSX_UNSIGNED; 3119 nfsm_reply(cnt); 3120 nfsm_srvpostop_attr(getret, &at); 3121 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 3122 txdr_hyper(at.va_filerev, tl); 3123 mp = mp2 = mb; 3124 bp = bpos; 3125 be = bp + M_TRAILINGSPACE(mp); 3126 3127 /* Loop through the records and build reply */ 3128 while (cpos < cend && ncookies > 0) { 3129 if (dp->d_fileno != 0 && dp->d_type != DT_WHT) { 3130 nfsrvfh_t nnsfh; 3131 3132 nlen = dp->d_namlen; 3133 rem = nfsm_rndup(nlen)-nlen; 3134 3135 /* 3136 * For readdir_and_lookup get the vnode using 3137 * the file number. 3138 */ 3139 if (VFS_VGET(vp->v_mount, dp->d_fileno, &nvp)) 3140 goto invalid; 3141 if (nfsrv_composefh(nvp, &nnsfh, true)) { 3142 vput(nvp); 3143 goto invalid; 3144 } 3145 if (VOP_GETATTR(nvp, vap, cred)) { 3146 vput(nvp); 3147 goto invalid; 3148 } 3149 vput(nvp); 3150 3151 /* 3152 * If either the dircount or maxcount will be 3153 * exceeded, get out now. Both of these lengths 3154 * are calculated conservatively, including all 3155 * XDR overheads. 3156 */ 3157 len += (8 * NFSX_UNSIGNED + nlen + rem + NFSX_V3FH + 3158 NFSX_V3POSTOPATTR); 3159 dirlen += (6 * NFSX_UNSIGNED + nlen + rem); 3160 if (len > cnt || dirlen > fullsiz) { 3161 eofflag = 0; 3162 break; 3163 } 3164 3165 /* 3166 * Build the directory record xdr from 3167 * the dirent entry. 3168 */ 3169 fp = (struct nfs_fattr *)&fl.fl_fattr; 3170 nfsm_srvfillattr(vap, fp); 3171 fl.fl_fhsize = txdr_unsigned(NFSX_V3FH); 3172 fl.fl_fhok = nfs_true; 3173 fl.fl_postopok = nfs_true; 3174 txdr_hyper(*cookiep, fl.fl_off.nfsuquad); 3175 3176 nfsm_clget; 3177 *tl = nfs_true; 3178 bp += NFSX_UNSIGNED; 3179 nfsm_clget; 3180 *tl = txdr_unsigned(dp->d_fileno >> 32); 3181 bp += NFSX_UNSIGNED; 3182 nfsm_clget; 3183 *tl = txdr_unsigned(dp->d_fileno); 3184 bp += NFSX_UNSIGNED; 3185 nfsm_clget; 3186 *tl = txdr_unsigned(nlen); 3187 bp += NFSX_UNSIGNED; 3188 3189 /* And loop around copying the name */ 3190 xfer = nlen; 3191 cp = dp->d_name; 3192 while (xfer > 0) { 3193 nfsm_clget; 3194 if ((bp + xfer) > be) 3195 tsiz = be - bp; 3196 else 3197 tsiz = xfer; 3198 memcpy(bp, cp, tsiz); 3199 bp += tsiz; 3200 xfer -= tsiz; 3201 if (xfer > 0) 3202 cp += tsiz; 3203 } 3204 /* And null pad to an int32_t boundary */ 3205 for (i = 0; i < rem; i++) 3206 *bp++ = '\0'; 3207 3208 /* 3209 * Now copy the flrep structure out. 3210 */ 3211 xfer = sizeof(struct flrep); 3212 cp = (void *)&fl; 3213 while (xfer > 0) { 3214 nfsm_clget; 3215 if ((bp + xfer) > be) 3216 tsiz = be - bp; 3217 else 3218 tsiz = xfer; 3219 memcpy(bp, cp, tsiz); 3220 bp += tsiz; 3221 xfer -= tsiz; 3222 if (xfer > 0) 3223 cp += tsiz; 3224 } 3225 3226 /* 3227 * ... and filehandle. 3228 */ 3229 xfer = NFSRVFH_SIZE(&nnsfh); 3230 cp = NFSRVFH_DATA(&nnsfh); 3231 while (xfer > 0) { 3232 nfsm_clget; 3233 if ((bp + xfer) > be) 3234 tsiz = be - bp; 3235 else 3236 tsiz = xfer; 3237 memcpy(bp, cp, tsiz); 3238 bp += tsiz; 3239 xfer -= tsiz; 3240 if (xfer > 0) 3241 cp += tsiz; 3242 } 3243 } 3244 invalid: 3245 cpos += dp->d_reclen; 3246 dp = (struct dirent *)cpos; 3247 cookiep++; 3248 ncookies--; 3249 } 3250 vrele(vp); 3251 nfsm_clget; 3252 *tl = nfs_false; 3253 bp += NFSX_UNSIGNED; 3254 nfsm_clget; 3255 if (eofflag) 3256 *tl = nfs_true; 3257 else 3258 *tl = nfs_false; 3259 bp += NFSX_UNSIGNED; 3260 if (mp != mb) { 3261 if (bp < be) 3262 mp->m_len = bp - mtod(mp, char *); 3263 } else 3264 mp->m_len += bp - bpos; 3265 free((void *)cookies, M_TEMP); 3266 free((void *)rbuf, M_TEMP); 3267 nfsm_srvdone; 3268 } 3269 3270 /* 3271 * nfs commit service 3272 */ 3273 int 3274 nfsrv_commit(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 3275 { 3276 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3277 struct mbuf *nam = nfsd->nd_nam; 3278 char *dpos = nfsd->nd_dpos; 3279 kauth_cred_t cred = nfsd->nd_cr; 3280 struct vattr bfor, aft; 3281 struct vnode *vp; 3282 nfsrvfh_t nsfh; 3283 u_int32_t *tl; 3284 int32_t t1; 3285 char *bpos; 3286 int error = 0, rdonly, for_ret = 1, aft_ret = 1, cache = 0; 3287 uint32_t cnt; 3288 char *cp2; 3289 struct mbuf *mb, *mreq __unused; 3290 u_quad_t frev, off, end; 3291 3292 nfsm_srvmtofh(&nsfh); 3293 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 3294 3295 off = fxdr_hyper(tl); 3296 tl += 2; 3297 cnt = fxdr_unsigned(uint32_t, *tl); 3298 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 3299 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 3300 if (error) { 3301 nfsm_reply(2 * NFSX_UNSIGNED); 3302 nfsm_srvwcc_data(for_ret, &bfor, aft_ret, &aft); 3303 return (0); 3304 } 3305 for_ret = VOP_GETATTR(vp, &bfor, cred); 3306 end = (cnt > 0) ? off + cnt : vp->v_size; 3307 if (end < off || end > vp->v_size) 3308 end = vp->v_size; 3309 if (off < vp->v_size) 3310 error = VOP_FSYNC(vp, cred, FSYNC_WAIT, off, end); 3311 /* else error == 0, from nfsrv_fhtovp() */ 3312 aft_ret = VOP_GETATTR(vp, &aft, cred); 3313 vput(vp); 3314 nfsm_reply(NFSX_V3WCCDATA + NFSX_V3WRITEVERF); 3315 nfsm_srvwcc_data(for_ret, &bfor, aft_ret, &aft); 3316 if (!error) { 3317 nfsm_build(tl, u_int32_t *, NFSX_V3WRITEVERF); 3318 *tl++ = txdr_unsigned(boottime.tv_sec); 3319 *tl = txdr_unsigned(boottime.tv_nsec / 1000); 3320 } else { 3321 return (0); 3322 } 3323 nfsm_srvdone; 3324 } 3325 3326 /* 3327 * nfs statfs service 3328 */ 3329 int 3330 nfsrv_statfs(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 3331 { 3332 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3333 struct mbuf *nam = nfsd->nd_nam; 3334 char *dpos = nfsd->nd_dpos; 3335 kauth_cred_t cred = nfsd->nd_cr; 3336 struct statvfs *sf = NULL; 3337 struct nfs_statfs *sfp; 3338 u_int32_t *tl; 3339 int32_t t1; 3340 char *bpos; 3341 int error = 0, rdonly, cache = 0, getret = 1; 3342 int v3 = (nfsd->nd_flag & ND_NFSV3); 3343 char *cp2; 3344 struct mbuf *mb, *mreq __unused; 3345 struct vnode *vp; 3346 struct vattr at; 3347 nfsrvfh_t nsfh; 3348 u_quad_t frev, tval; 3349 3350 nfsm_srvmtofh(&nsfh); 3351 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 3352 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 3353 if (error) { 3354 nfsm_reply(NFSX_UNSIGNED); 3355 nfsm_srvpostop_attr(getret, &at); 3356 return (0); 3357 } 3358 sf = malloc(sizeof(*sf), M_TEMP, M_WAITOK); 3359 error = VFS_STATVFS(vp->v_mount, sf); 3360 getret = VOP_GETATTR(vp, &at, cred); 3361 vput(vp); 3362 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_STATFS(v3)); 3363 if (v3) 3364 nfsm_srvpostop_attr(getret, &at); 3365 if (error) { 3366 free(sf, M_TEMP); 3367 return (0); 3368 } 3369 nfsm_build(sfp, struct nfs_statfs *, NFSX_STATFS(v3)); 3370 if (v3) { 3371 tval = (u_quad_t)((quad_t)sf->f_blocks * (quad_t)sf->f_frsize); 3372 txdr_hyper(tval, &sfp->sf_tbytes); 3373 tval = (u_quad_t)((quad_t)sf->f_bfree * (quad_t)sf->f_frsize); 3374 txdr_hyper(tval, &sfp->sf_fbytes); 3375 tval = (u_quad_t)((quad_t)sf->f_bavail * (quad_t)sf->f_frsize); 3376 txdr_hyper(tval, &sfp->sf_abytes); 3377 tval = (u_quad_t)sf->f_files; 3378 txdr_hyper(tval, &sfp->sf_tfiles); 3379 tval = (u_quad_t)sf->f_ffree; 3380 txdr_hyper(tval, &sfp->sf_ffiles); 3381 txdr_hyper(tval, &sfp->sf_afiles); 3382 sfp->sf_invarsec = 0; 3383 } else { 3384 sfp->sf_tsize = txdr_unsigned(NFS_MAXDGRAMDATA); 3385 sfp->sf_bsize = txdr_unsigned(sf->f_frsize); 3386 sfp->sf_blocks = txdr_unsigned(sf->f_blocks); 3387 sfp->sf_bfree = txdr_unsigned(sf->f_bfree); 3388 sfp->sf_bavail = txdr_unsigned(sf->f_bavail); 3389 } 3390 nfsmout: 3391 if (sf) 3392 free(sf, M_TEMP); 3393 return error; 3394 } 3395 3396 /* 3397 * nfs fsinfo service 3398 */ 3399 int 3400 nfsrv_fsinfo(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 3401 { 3402 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3403 struct mbuf *nam = nfsd->nd_nam; 3404 char *dpos = nfsd->nd_dpos; 3405 kauth_cred_t cred = nfsd->nd_cr; 3406 u_int32_t *tl; 3407 struct nfsv3_fsinfo *sip; 3408 int32_t t1; 3409 char *bpos; 3410 int error = 0, rdonly, cache = 0, getret = 1; 3411 uint32_t maxdata; 3412 char *cp2; 3413 struct mbuf *mb, *mreq __unused; 3414 struct vnode *vp; 3415 struct vattr at; 3416 nfsrvfh_t nsfh; 3417 u_quad_t frev, maxfsize; 3418 struct statvfs *sb; 3419 3420 nfsm_srvmtofh(&nsfh); 3421 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 3422 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 3423 if (error) { 3424 nfsm_reply(NFSX_UNSIGNED); 3425 nfsm_srvpostop_attr(getret, &at); 3426 return (0); 3427 } 3428 3429 /* XXX Try to make a guess on the max file size. */ 3430 sb = malloc(sizeof(*sb), M_TEMP, M_WAITOK); 3431 VFS_STATVFS(vp->v_mount, sb); 3432 maxfsize = (u_quad_t)0x80000000 * sb->f_frsize - 1; 3433 free(sb, M_TEMP); 3434 3435 getret = VOP_GETATTR(vp, &at, cred); 3436 vput(vp); 3437 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3FSINFO); 3438 nfsm_srvpostop_attr(getret, &at); 3439 nfsm_build(sip, struct nfsv3_fsinfo *, NFSX_V3FSINFO); 3440 3441 /* 3442 * XXX 3443 * There should be file system VFS OP(s) to get this information. 3444 * For now, assume ufs. 3445 */ 3446 if (slp->ns_so->so_type == SOCK_DGRAM) 3447 maxdata = NFS_MAXDGRAMDATA; 3448 else 3449 maxdata = NFS_MAXDATA; 3450 sip->fs_rtmax = txdr_unsigned(maxdata); 3451 sip->fs_rtpref = txdr_unsigned(maxdata); 3452 sip->fs_rtmult = txdr_unsigned(NFS_FABLKSIZE); 3453 sip->fs_wtmax = txdr_unsigned(maxdata); 3454 sip->fs_wtpref = txdr_unsigned(maxdata); 3455 sip->fs_wtmult = txdr_unsigned(NFS_FABLKSIZE); 3456 sip->fs_dtpref = txdr_unsigned(maxdata); 3457 txdr_hyper(maxfsize, &sip->fs_maxfilesize); 3458 sip->fs_timedelta.nfsv3_sec = 0; 3459 sip->fs_timedelta.nfsv3_nsec = txdr_unsigned(1); 3460 sip->fs_properties = txdr_unsigned(NFSV3FSINFO_LINK | 3461 NFSV3FSINFO_SYMLINK | NFSV3FSINFO_HOMOGENEOUS | 3462 NFSV3FSINFO_CANSETTIME); 3463 nfsm_srvdone; 3464 } 3465 3466 /* 3467 * nfs pathconf service 3468 */ 3469 int 3470 nfsrv_pathconf(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 3471 { 3472 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3473 struct mbuf *nam = nfsd->nd_nam; 3474 char *dpos = nfsd->nd_dpos; 3475 kauth_cred_t cred = nfsd->nd_cr; 3476 u_int32_t *tl; 3477 struct nfsv3_pathconf *pc; 3478 int32_t t1; 3479 char *bpos; 3480 int error = 0, rdonly, cache = 0, getret = 1; 3481 register_t linkmax, namemax, chownres, notrunc; 3482 char *cp2; 3483 struct mbuf *mb, *mreq __unused; 3484 struct vnode *vp; 3485 struct vattr at; 3486 nfsrvfh_t nsfh; 3487 u_quad_t frev; 3488 3489 nfsm_srvmtofh(&nsfh); 3490 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 3491 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 3492 if (error) { 3493 nfsm_reply(NFSX_UNSIGNED); 3494 nfsm_srvpostop_attr(getret, &at); 3495 return (0); 3496 } 3497 error = VOP_PATHCONF(vp, _PC_LINK_MAX, &linkmax); 3498 if (!error) 3499 error = VOP_PATHCONF(vp, _PC_NAME_MAX, &namemax); 3500 if (!error) 3501 error = VOP_PATHCONF(vp, _PC_CHOWN_RESTRICTED, &chownres); 3502 if (!error) 3503 error = VOP_PATHCONF(vp, _PC_NO_TRUNC, ¬runc); 3504 getret = VOP_GETATTR(vp, &at, cred); 3505 vput(vp); 3506 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3PATHCONF); 3507 nfsm_srvpostop_attr(getret, &at); 3508 if (error) 3509 return (0); 3510 nfsm_build(pc, struct nfsv3_pathconf *, NFSX_V3PATHCONF); 3511 3512 pc->pc_linkmax = txdr_unsigned(linkmax); 3513 pc->pc_namemax = txdr_unsigned(namemax); 3514 pc->pc_notrunc = txdr_unsigned(notrunc); 3515 pc->pc_chownrestricted = txdr_unsigned(chownres); 3516 3517 /* 3518 * These should probably be supported by VOP_PATHCONF(), but 3519 * until msdosfs is exportable (why would you want to?), the 3520 * Unix defaults should be ok. 3521 */ 3522 pc->pc_caseinsensitive = nfs_false; 3523 pc->pc_casepreserving = nfs_true; 3524 nfsm_srvdone; 3525 } 3526 3527 /* 3528 * Null operation, used by clients to ping server 3529 */ 3530 /* ARGSUSED */ 3531 int 3532 nfsrv_null(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, 3533 struct lwp *lwp, struct mbuf **mrq) 3534 { 3535 struct mbuf *mrep = nfsd->nd_mrep; 3536 char *bpos; 3537 int error = NFSERR_RETVOID, cache = 0; 3538 struct mbuf *mb, *mreq __unused; 3539 u_quad_t frev; 3540 3541 nfsm_reply(0); 3542 nfsmout: 3543 return (0); 3544 } 3545 3546 /* 3547 * No operation, used for obsolete procedures 3548 */ 3549 /* ARGSUSED */ 3550 int 3551 nfsrv_noop(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, 3552 struct lwp *lwp, struct mbuf **mrq) 3553 { 3554 struct mbuf *mrep = nfsd->nd_mrep; 3555 char *bpos; 3556 int error, cache = 0; 3557 struct mbuf *mb, *mreq __unused; 3558 u_quad_t frev; 3559 3560 if (nfsd->nd_repstat) 3561 error = nfsd->nd_repstat; 3562 else 3563 error = EPROCUNAVAIL; 3564 nfsm_reply(0); 3565 nfsmout: 3566 return (0); 3567 } 3568 3569 /* 3570 * Perform access checking for vnodes obtained from file handles that would 3571 * refer to files already opened by a Unix client. You cannot just use 3572 * vn_writechk() and VOP_ACCESS() for two reasons. 3573 * 1 - You must check for exported rdonly as well as MNT_RDONLY for the write case 3574 * 2 - The owner is to be given access irrespective of mode bits for some 3575 * operations, so that processes that chmod after opening a file don't 3576 * break. I don't like this because it opens a security hole, but since 3577 * the nfs server opens a security hole the size of a barn door anyhow, 3578 * what the heck. 3579 * 3580 * The exception to rule 2 is EPERM. If a file is IMMUTABLE, VOP_ACCESS() 3581 * will return EPERM instead of EACCES. EPERM is always an error. 3582 */ 3583 int 3584 nfsrv_access(struct vnode *vp, int flags, kauth_cred_t cred, int rdonly, struct lwp *lwp, int override) 3585 { 3586 struct vattr vattr; 3587 int error; 3588 if (flags & VWRITE) { 3589 /* Just vn_writechk() changed to check rdonly */ 3590 /* 3591 * Disallow write attempts on read-only file systems; 3592 * unless the file is a socket or a block or character 3593 * device resident on the file system. 3594 */ 3595 if (rdonly || (vp->v_mount->mnt_flag & MNT_RDONLY)) { 3596 switch (vp->v_type) { 3597 case VREG: 3598 case VDIR: 3599 case VLNK: 3600 return (EROFS); 3601 default: 3602 break; 3603 } 3604 } 3605 3606 /* 3607 * If the vnode is in use as a process's text, 3608 * we can't allow writing. 3609 */ 3610 if (vp->v_iflag & VI_TEXT) 3611 return (ETXTBSY); 3612 } 3613 error = VOP_GETATTR(vp, &vattr, cred); 3614 if (error) 3615 return (error); 3616 error = VOP_ACCESS(vp, flags, cred); 3617 /* 3618 * Allow certain operations for the owner (reads and writes 3619 * on files that are already open). 3620 */ 3621 if (override && error == EACCES && kauth_cred_geteuid(cred) == vattr.va_uid) 3622 error = 0; 3623 return error; 3624 } 3625
Indexes created Wed Sep 24 02:09:48 GMT 2025