nfs_serv.c revision 1.174
1 /* $NetBSD: nfs_serv.c,v 1.174 2018/05/03 07:28:43 hannken Exp $ */ 2 3 /* 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Rick Macklem at The University of Guelph. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)nfs_serv.c 8.8 (Berkeley) 7/31/95 35 */ 36 37 /* 38 * nfs version 2 and 3 server calls to vnode ops 39 * - these routines generally have 3 phases 40 * 1 - break down and validate rpc request in mbuf list 41 * 2 - do the vnode ops for the request 42 * (surprisingly ?? many are very similar to syscalls in vfs_syscalls.c) 43 * 3 - build the rpc reply in an mbuf list 44 * nb: 45 * - do not mix the phases, since the nfsm_?? macros can return failures 46 * on a bad rpc or similar and do not do any vrele() or vput()'s 47 * 48 * - the nfsm_reply() macro generates an nfs rpc reply with the nfs 49 * error number iff error != 0 whereas 50 * returning an error from the server function implies a fatal error 51 * such as a badly constructed rpc request that should be dropped without 52 * a reply. 53 * For Version 3, nfsm_reply() does not return for the error case, since 54 * most version 3 rpcs return more than the status for error cases. 55 */ 56 57 #include <sys/cdefs.h> 58 __KERNEL_RCSID(0, "$NetBSD: nfs_serv.c,v 1.174 2018/05/03 07:28:43 hannken Exp $"); 59 60 #include <sys/param.h> 61 #include <sys/systm.h> 62 #include <sys/proc.h> 63 #include <sys/file.h> 64 #include <sys/namei.h> 65 #include <sys/vnode.h> 66 #include <sys/mount.h> 67 #include <sys/socket.h> 68 #include <sys/socketvar.h> 69 #include <sys/mbuf.h> 70 #include <sys/dirent.h> 71 #include <sys/stat.h> 72 #include <sys/kernel.h> 73 #include <sys/hash.h> 74 #include <sys/kauth.h> 75 #include <sys/module.h> 76 #include <sys/syscall.h> 77 #include <sys/syscallargs.h> 78 #include <sys/syscallvar.h> 79 80 #include <uvm/uvm.h> 81 82 #include <nfs/nfsproto.h> 83 #include <nfs/rpcv2.h> 84 #include <nfs/nfs.h> 85 #include <nfs/xdr_subs.h> 86 #include <nfs/nfsm_subs.h> 87 #include <nfs/nfs_var.h> 88 89 MODULE(MODULE_CLASS_MISC, nfsserver, "nfs"); 90 91 /* Global vars */ 92 extern u_int32_t nfs_xdrneg1; 93 extern u_int32_t nfs_false, nfs_true; 94 extern const enum vtype nv3tov_type[8]; 95 extern struct nfsstats nfsstats; 96 extern const nfstype nfsv2_type[9]; 97 extern const nfstype nfsv3_type[9]; 98 int nfsrvw_procrastinate = NFS_GATHERDELAY * 1000; 99 bool nfsd_use_loan = true; /* use page-loan for READ OP */ 100 101 #define nqsrv_getl(vp, rw) /* nothing */ 102 103 static const struct syscall_package nfsserver_syscalls[] = { 104 { SYS_nfssvc, 0, (sy_call_t *)sys_nfssvc }, 105 { 0, 0, NULL }, 106 }; 107 108 static int 109 nfsserver_modcmd(modcmd_t cmd, void *arg) 110 { 111 extern struct vfs_hooks nfs_export_hooks; /* XXX */ 112 int error; 113 114 switch (cmd) { 115 case MODULE_CMD_INIT: 116 error = syscall_establish(NULL, nfsserver_syscalls); 117 if (error != 0) { 118 return error; 119 } 120 nfs_init(); /* XXX for monolithic kernel */ 121 netexport_init(); 122 nfsrv_initcache(); /* Init the server request cache */ 123 nfsrv_init(0); /* Init server data structures */ 124 vfs_hooks_attach(&nfs_export_hooks); 125 nfs_timer_srvinit(nfsrv_timer); 126 return 0; 127 case MODULE_CMD_FINI: 128 error = syscall_disestablish(NULL, nfsserver_syscalls); 129 if (error != 0) { 130 return error; 131 } 132 /* 133 * Kill export list before detaching VFS hooks, so we 134 * we don't leak state due to a concurrent umount(). 135 */ 136 netexport_fini(); 137 vfs_hooks_detach(&nfs_export_hooks); 138 139 /* Kill timer before server goes away. */ 140 nfs_timer_srvfini(); 141 nfsrv_fini(); 142 143 /* Server uses server cache, so kill cache last. */ 144 nfsrv_finicache(); 145 nfs_fini(); 146 return 0; 147 case MODULE_CMD_AUTOUNLOAD: 148 if (netexport_hasexports()) 149 return EBUSY; 150 /*FALLTHROUGH*/ 151 default: 152 return ENOTTY; 153 } 154 } 155 156 /* 157 * nfs v3 access service 158 */ 159 int 160 nfsrv3_access(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 161 { 162 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 163 struct mbuf *nam = nfsd->nd_nam; 164 char *dpos = nfsd->nd_dpos; 165 kauth_cred_t cred = nfsd->nd_cr; 166 struct vnode *vp; 167 nfsrvfh_t nsfh; 168 u_int32_t *tl; 169 int32_t t1; 170 char *bpos; 171 int error = 0, rdonly, cache = 0, getret; 172 char *cp2; 173 struct mbuf *mb, *mreq __unused; 174 struct vattr va; 175 u_long inmode, testmode, outmode; 176 u_quad_t frev; 177 178 nfsm_srvmtofh(&nsfh); 179 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 180 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, &rdonly, 181 (nfsd->nd_flag & ND_KERBAUTH), false); 182 if (error) { 183 nfsm_reply(NFSX_UNSIGNED); 184 nfsm_srvpostop_attr(1, (struct vattr *)0); 185 return (0); 186 } 187 inmode = fxdr_unsigned(u_int32_t, *tl); 188 outmode = 0; 189 if ((inmode & NFSV3ACCESS_READ) && 190 nfsrv_access(vp, VREAD, cred, rdonly, lwp, 0) == 0) 191 outmode |= NFSV3ACCESS_READ; 192 if (vp->v_type != VDIR) { 193 testmode = inmode & (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND); 194 if (testmode && 195 nfsrv_access(vp, VWRITE, cred, rdonly, lwp, 0) == 0) 196 outmode |= testmode; 197 if ((inmode & NFSV3ACCESS_EXECUTE) && 198 nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 0) == 0) 199 outmode |= NFSV3ACCESS_EXECUTE; 200 } else { 201 testmode = inmode & (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | 202 NFSV3ACCESS_DELETE); 203 if (testmode && 204 nfsrv_access(vp, VWRITE, cred, rdonly, lwp, 0) == 0) 205 outmode |= testmode; 206 if ((inmode & NFSV3ACCESS_LOOKUP) && 207 nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 0) == 0) 208 outmode |= NFSV3ACCESS_LOOKUP; 209 } 210 getret = VOP_GETATTR(vp, &va, cred); 211 vput(vp); 212 nfsm_reply(NFSX_POSTOPATTR(1) + NFSX_UNSIGNED); 213 nfsm_srvpostop_attr(getret, &va); 214 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 215 *tl = txdr_unsigned(outmode); 216 nfsm_srvdone; 217 } 218 219 /* 220 * nfs getattr service 221 */ 222 int 223 nfsrv_getattr(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 224 { 225 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 226 struct mbuf *nam = nfsd->nd_nam; 227 char *dpos = nfsd->nd_dpos; 228 kauth_cred_t cred = nfsd->nd_cr; 229 struct nfs_fattr *fp; 230 struct vattr va; 231 struct vnode *vp; 232 nfsrvfh_t nsfh; 233 u_int32_t *tl; 234 int32_t t1; 235 char *bpos; 236 int error = 0, rdonly, cache = 0; 237 char *cp2; 238 struct mbuf *mb, *mreq __unused; 239 u_quad_t frev; 240 241 nfsm_srvmtofh(&nsfh); 242 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, &rdonly, 243 (nfsd->nd_flag & ND_KERBAUTH), false); 244 if (error) { 245 nfsm_reply(0); 246 return (0); 247 } 248 nqsrv_getl(vp, ND_READ); 249 error = VOP_GETATTR(vp, &va, cred); 250 vput(vp); 251 nfsm_reply(NFSX_FATTR(nfsd->nd_flag & ND_NFSV3)); 252 if (error) 253 return (0); 254 nfsm_build(fp, struct nfs_fattr *, NFSX_FATTR(nfsd->nd_flag & ND_NFSV3)); 255 nfsm_srvfillattr(&va, fp); 256 nfsm_srvdone; 257 } 258 259 /* 260 * nfs setattr service 261 */ 262 int 263 nfsrv_setattr(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 264 { 265 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 266 struct mbuf *nam = nfsd->nd_nam; 267 char *dpos = nfsd->nd_dpos; 268 kauth_cred_t cred = nfsd->nd_cr; 269 struct vattr va, preat; 270 struct nfsv2_sattr *sp; 271 struct nfs_fattr *fp; 272 struct vnode *vp; 273 nfsrvfh_t nsfh; 274 u_int32_t *tl; 275 int32_t t1; 276 char *bpos; 277 int error = 0, rdonly, cache = 0, preat_ret = 1, postat_ret = 1; 278 int v3 = (nfsd->nd_flag & ND_NFSV3), gcheck = 0; 279 char *cp2; 280 struct mbuf *mb, *mreq __unused; 281 u_quad_t frev; 282 struct timespec guard; 283 284 memset(&guard, 0, sizeof guard); /* XXX gcc */ 285 286 nfsm_srvmtofh(&nsfh); 287 vattr_null(&va); 288 if (v3) { 289 nfsm_srvsattr(&va); 290 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 291 gcheck = fxdr_unsigned(int, *tl); 292 if (gcheck) { 293 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 294 fxdr_nfsv3time(tl, &guard); 295 } 296 } else { 297 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 298 /* 299 * Nah nah nah nah na nah 300 * There is a bug in the Sun client that puts 0xffff in the mode 301 * field of sattr when it should put in 0xffffffff. The u_short 302 * doesn't sign extend. 303 * --> check the low order 2 bytes for 0xffff 304 */ 305 if ((fxdr_unsigned(int, sp->sa_mode) & 0xffff) != 0xffff) 306 va.va_mode = nfstov_mode(sp->sa_mode); 307 if (sp->sa_uid != nfs_xdrneg1) 308 va.va_uid = fxdr_unsigned(uid_t, sp->sa_uid); 309 if (sp->sa_gid != nfs_xdrneg1) 310 va.va_gid = fxdr_unsigned(gid_t, sp->sa_gid); 311 if (sp->sa_size != nfs_xdrneg1) 312 va.va_size = fxdr_unsigned(u_quad_t, sp->sa_size); 313 if (sp->sa_atime.nfsv2_sec != nfs_xdrneg1) { 314 #ifdef notyet 315 fxdr_nfsv2time(&sp->sa_atime, &va.va_atime); 316 #else 317 va.va_atime.tv_sec = 318 fxdr_unsigned(u_int32_t,sp->sa_atime.nfsv2_sec); 319 va.va_atime.tv_nsec = 0; 320 #endif 321 } 322 if (sp->sa_mtime.nfsv2_sec != nfs_xdrneg1) 323 fxdr_nfsv2time(&sp->sa_mtime, &va.va_mtime); 324 325 } 326 327 /* 328 * Now that we have all the fields, lets do it. 329 */ 330 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, &rdonly, 331 (nfsd->nd_flag & ND_KERBAUTH), false); 332 if (error) { 333 nfsm_reply(2 * NFSX_UNSIGNED); 334 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 335 return (0); 336 } 337 nqsrv_getl(vp, ND_WRITE); 338 if (v3) { 339 error = preat_ret = VOP_GETATTR(vp, &preat, cred); 340 if (!error && gcheck && 341 (preat.va_ctime.tv_sec != guard.tv_sec || 342 preat.va_ctime.tv_nsec != guard.tv_nsec)) 343 error = NFSERR_NOT_SYNC; 344 if (error) { 345 vput(vp); 346 nfsm_reply(NFSX_WCCDATA(v3)); 347 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 348 return (0); 349 } 350 } 351 352 /* 353 * If the size is being changed write acces is required, otherwise 354 * just check for a read only file system. 355 */ 356 if (va.va_size == ((u_quad_t)((quad_t) -1))) { 357 if (rdonly || (vp->v_mount->mnt_flag & MNT_RDONLY)) { 358 error = EROFS; 359 goto out; 360 } 361 } else { 362 if (vp->v_type == VDIR) { 363 error = EISDIR; 364 goto out; 365 } else if ((error = nfsrv_access(vp, VWRITE, cred, rdonly, 366 lwp, 0)) != 0) 367 goto out; 368 } 369 error = VOP_SETATTR(vp, &va, cred); 370 postat_ret = VOP_GETATTR(vp, &va, cred); 371 if (!error) 372 error = postat_ret; 373 out: 374 vput(vp); 375 nfsm_reply(NFSX_WCCORFATTR(v3)); 376 if (v3) { 377 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 378 return (0); 379 } else { 380 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 381 nfsm_srvfillattr(&va, fp); 382 } 383 nfsm_srvdone; 384 } 385 386 /* 387 * nfs lookup rpc 388 */ 389 int 390 nfsrv_lookup(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 391 { 392 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 393 struct mbuf *nam = nfsd->nd_nam; 394 char *dpos = nfsd->nd_dpos; 395 kauth_cred_t cred = nfsd->nd_cr; 396 struct nfs_fattr *fp; 397 struct nameidata nd, ind, *ndp = &nd; 398 struct pathbuf *ipb = NULL; 399 struct vnode *vp, *dirp; 400 nfsrvfh_t nsfh; 401 char *cp; 402 u_int32_t *tl; 403 int32_t t1; 404 char *bpos; 405 int error = 0, cache = 0, dirattr_ret = 1; 406 uint32_t len; 407 int v3 = (nfsd->nd_flag & ND_NFSV3), pubflag; 408 char *cp2; 409 struct mbuf *mb, *mreq __unused; 410 struct vattr va, dirattr; 411 u_quad_t frev; 412 413 nfsm_srvmtofh(&nsfh); 414 nfsm_srvnamesiz(len); 415 416 pubflag = nfs_ispublicfh(&nsfh); 417 418 nd.ni_cnd.cn_cred = cred; 419 nd.ni_cnd.cn_nameiop = LOOKUP; 420 nd.ni_cnd.cn_flags = LOCKLEAF; 421 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 422 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), pubflag); 423 424 if (!error && pubflag) { 425 if (nd.ni_vp->v_type == VDIR && nfs_pub.np_index != NULL && 426 (ipb = pathbuf_create(nfs_pub.np_index)) != NULL) { 427 /* 428 * Setup call to lookup() to see if we can find 429 * the index file. Arguably, this doesn't belong 430 * in a kernel.. Ugh. 431 */ 432 ind = nd; 433 VOP_UNLOCK(nd.ni_vp); 434 ind.ni_pathbuf = ipb; 435 436 error = lookup_for_nfsd_index(&ind, nd.ni_vp); 437 if (!error) { 438 /* 439 * Found an index file. Get rid of 440 * the old references. 441 */ 442 if (dirp) 443 vrele(dirp); 444 dirp = nd.ni_vp; 445 ndp = &ind; 446 } else 447 error = 0; 448 } 449 /* 450 * If the public filehandle was used, check that this lookup 451 * didn't result in a filehandle outside the publicly exported 452 * filesystem. 453 */ 454 455 if (!error && ndp->ni_vp->v_mount != nfs_pub.np_mount) { 456 vput(nd.ni_vp); 457 error = EPERM; 458 } 459 } 460 461 if (error) { 462 if (nd.ni_pathbuf != NULL) { 463 pathbuf_destroy(nd.ni_pathbuf); 464 } 465 if (ipb != NULL) { 466 pathbuf_destroy(ipb); 467 } 468 if (dirp) { 469 if (v3) { 470 vn_lock(dirp, LK_SHARED | LK_RETRY); 471 dirattr_ret = VOP_GETATTR(dirp, &dirattr, cred); 472 vput(dirp); 473 } else 474 vrele(dirp); 475 } 476 nfsm_reply(NFSX_POSTOPATTR(v3)); 477 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 478 return (0); 479 } 480 481 nqsrv_getl(ndp->ni_startdir, ND_READ); 482 pathbuf_destroy(nd.ni_pathbuf); 483 if (ipb != NULL) { 484 pathbuf_destroy(ipb); 485 } 486 vp = ndp->ni_vp; 487 error = nfsrv_composefh(vp, &nsfh, v3); 488 if (!error) 489 error = VOP_GETATTR(vp, &va, cred); 490 vput(vp); 491 if (dirp) { 492 if (v3) { 493 vn_lock(dirp, LK_SHARED | LK_RETRY); 494 dirattr_ret = VOP_GETATTR(dirp, &dirattr, cred); 495 vput(dirp); 496 } else 497 vrele(dirp); 498 } 499 nfsm_reply(NFSX_SRVFH(&nsfh, v3) + NFSX_POSTOPORFATTR(v3) + 500 NFSX_POSTOPATTR(v3)); 501 if (error) { 502 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 503 return (0); 504 } 505 nfsm_srvfhtom(&nsfh, v3); 506 if (v3) { 507 nfsm_srvpostop_attr(0, &va); 508 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 509 } else { 510 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 511 nfsm_srvfillattr(&va, fp); 512 } 513 nfsm_srvdone; 514 } 515 516 /* 517 * nfs readlink service 518 */ 519 int 520 nfsrv_readlink(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 521 { 522 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 523 struct mbuf *nam = nfsd->nd_nam; 524 char *dpos = nfsd->nd_dpos; 525 kauth_cred_t cred = nfsd->nd_cr; 526 struct iovec iv[(NFS_MAXPATHLEN+MLEN-1)/MLEN]; 527 struct iovec *ivp = iv; 528 struct mbuf *mp; 529 u_int32_t *tl; 530 int32_t t1; 531 char *bpos; 532 int error = 0, rdonly, cache = 0, i, padlen, getret; 533 uint32_t len; 534 int v3 = (nfsd->nd_flag & ND_NFSV3); 535 char *cp2; 536 struct mbuf *mb, *mp2 = NULL, *mp3 = NULL, *mreq __unused; 537 struct vnode *vp; 538 struct vattr attr; 539 nfsrvfh_t nsfh; 540 struct uio io, *uiop = &io; 541 u_quad_t frev; 542 543 nfsm_srvmtofh(&nsfh); 544 len = 0; 545 i = 0; 546 while (len < NFS_MAXPATHLEN) { 547 mp = m_get(M_WAIT, MT_DATA); 548 MCLAIM(mp, &nfs_mowner); 549 m_clget(mp, M_WAIT); 550 mp->m_len = NFSMSIZ(mp); 551 if (len == 0) 552 mp3 = mp2 = mp; 553 else { 554 mp2->m_next = mp; 555 mp2 = mp; 556 } 557 if ((len+mp->m_len) > NFS_MAXPATHLEN) { 558 mp->m_len = NFS_MAXPATHLEN-len; 559 len = NFS_MAXPATHLEN; 560 } else 561 len += mp->m_len; 562 ivp->iov_base = mtod(mp, void *); 563 ivp->iov_len = mp->m_len; 564 i++; 565 ivp++; 566 } 567 uiop->uio_iov = iv; 568 uiop->uio_iovcnt = i; 569 uiop->uio_offset = 0; 570 uiop->uio_resid = len; 571 uiop->uio_rw = UIO_READ; 572 UIO_SETUP_SYSSPACE(uiop); 573 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 574 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 575 if (error) { 576 m_freem(mp3); 577 nfsm_reply(2 * NFSX_UNSIGNED); 578 nfsm_srvpostop_attr(1, (struct vattr *)0); 579 return (0); 580 } 581 if (vp->v_type != VLNK) { 582 if (v3) 583 error = EINVAL; 584 else 585 error = ENXIO; 586 goto out; 587 } 588 nqsrv_getl(vp, ND_READ); 589 error = VOP_READLINK(vp, uiop, cred); 590 out: 591 getret = VOP_GETATTR(vp, &attr, cred); 592 vput(vp); 593 if (error) 594 m_freem(mp3); 595 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_UNSIGNED); 596 if (v3) { 597 nfsm_srvpostop_attr(getret, &attr); 598 if (error) 599 return (0); 600 } 601 len -= uiop->uio_resid; 602 padlen = nfsm_padlen(len); 603 if (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 = min(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 = min(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 case NFSV3CREATE_UNCHECKED: 1471 nfsm_srvsattr(&va); 1472 break; 1473 case NFSV3CREATE_EXCLUSIVE: 1474 nfsm_dissect(cp, void *, NFSX_V3CREATEVERF); 1475 memcpy(cverf, cp, NFSX_V3CREATEVERF); 1476 exclusive_flag = 1; 1477 break; 1478 }; 1479 va.va_type = VREG; 1480 } else { 1481 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1482 va.va_type = IFTOVT(fxdr_unsigned(u_int32_t, sp->sa_mode)); 1483 if (va.va_type == VNON) 1484 va.va_type = VREG; 1485 va.va_mode = nfstov_mode(sp->sa_mode); 1486 switch (va.va_type) { 1487 case VREG: 1488 tsize = fxdr_unsigned(int32_t, sp->sa_size); 1489 if (tsize != -1) 1490 va.va_size = (u_quad_t)tsize; 1491 break; 1492 case VCHR: 1493 case VBLK: 1494 case VFIFO: 1495 rdev = fxdr_unsigned(int32_t, sp->sa_size); 1496 break; 1497 default: 1498 break; 1499 }; 1500 } 1501 1502 /* 1503 * Iff doesn't exist, create it 1504 * otherwise just truncate to 0 length 1505 * should I set the mode too ?? 1506 */ 1507 if (nd.ni_vp == NULL) { 1508 if (va.va_type == VREG || va.va_type == VSOCK) { 1509 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1510 error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1511 if (!error) { 1512 vn_lock(nd.ni_vp, LK_EXCLUSIVE | LK_RETRY); 1513 if (exclusive_flag) { 1514 exclusive_flag = 0; 1515 vattr_null(&va); 1516 /* 1517 * XXX 1518 * assuming NFSX_V3CREATEVERF 1519 * == sizeof(nfstime3) 1520 */ 1521 fxdr_nfsv3time(cverf, &va.va_atime); 1522 error = VOP_SETATTR(nd.ni_vp, &va, 1523 cred); 1524 } 1525 } 1526 } else if (va.va_type == VCHR || va.va_type == VBLK || 1527 va.va_type == VFIFO) { 1528 if (va.va_type == VCHR && rdev == 0xffffffff) 1529 va.va_type = VFIFO; 1530 if (va.va_type != VFIFO && 1531 (error = kauth_authorize_system(cred, 1532 KAUTH_SYSTEM_MKNOD, 0, NULL, NULL, NULL))) { 1533 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1534 vput(nd.ni_dvp); 1535 abort = 0; 1536 nfsm_reply(0); 1537 if (nd.ni_pathbuf != NULL) { 1538 pathbuf_destroy(nd.ni_pathbuf); 1539 nd.ni_pathbuf = NULL; 1540 } 1541 return (error); 1542 } else 1543 va.va_rdev = (dev_t)rdev; 1544 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1545 error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, 1546 &va); 1547 if (!error) { 1548 vn_lock(nd.ni_vp, LK_EXCLUSIVE | LK_RETRY); 1549 } else { 1550 nfsm_reply(0); 1551 } 1552 } else { 1553 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1554 if (nd.ni_pathbuf != NULL) { 1555 pathbuf_destroy(nd.ni_pathbuf); 1556 nd.ni_pathbuf = NULL; 1557 } 1558 error = ENXIO; 1559 abort = 0; 1560 } 1561 vp = nd.ni_vp; 1562 } else { 1563 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1564 if (nd.ni_pathbuf != NULL) { 1565 pathbuf_destroy(nd.ni_pathbuf); 1566 nd.ni_pathbuf = NULL; 1567 } 1568 vp = nd.ni_vp; 1569 abort = 0; 1570 if (!error && va.va_size != -1) { 1571 error = nfsrv_access(vp, VWRITE, cred, 1572 (nd.ni_cnd.cn_flags & RDONLY), lwp, 0); 1573 if (!error) { 1574 nqsrv_getl(vp, ND_WRITE); 1575 tempsize = va.va_size; 1576 vattr_null(&va); 1577 va.va_size = tempsize; 1578 error = VOP_SETATTR(vp, &va, cred); 1579 } 1580 } 1581 if (error) 1582 vput(vp); 1583 } 1584 if (!error) { 1585 error = nfsrv_composefh(vp, &nsfh, v3); 1586 if (!error) 1587 error = VOP_GETATTR(vp, &va, cred); 1588 vput(vp); 1589 } 1590 if (nd.ni_dvp == vp) 1591 vrele(nd.ni_dvp); 1592 else 1593 vput(nd.ni_dvp); 1594 if (v3) { 1595 if (exclusive_flag && !error) { 1596 /* 1597 * XXX assuming NFSX_V3CREATEVERF == sizeof(nfstime3) 1598 */ 1599 char oldverf[NFSX_V3CREATEVERF]; 1600 1601 txdr_nfsv3time(&va.va_atime, oldverf); 1602 if (memcmp(cverf, oldverf, NFSX_V3CREATEVERF)) 1603 error = EEXIST; 1604 } 1605 if (dirp) { 1606 vn_lock(dirp, LK_SHARED | LK_RETRY); 1607 diraft_ret = VOP_GETATTR(dirp, &diraft, cred); 1608 VOP_UNLOCK(dirp); 1609 } 1610 } 1611 if (dirp) { 1612 vrele(dirp); 1613 dirp = NULL; 1614 } 1615 if (nd.ni_pathbuf != NULL) { 1616 pathbuf_destroy(nd.ni_pathbuf); 1617 nd.ni_pathbuf = NULL; 1618 } 1619 abort = 0; 1620 nfsm_reply(NFSX_SRVFH(&nsfh, v3) + NFSX_FATTR(v3) + NFSX_WCCDATA(v3)); 1621 if (v3) { 1622 if (!error) { 1623 nfsm_srvpostop_fh(&nsfh); 1624 nfsm_srvpostop_attr(0, &va); 1625 } 1626 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1627 } else { 1628 nfsm_srvfhtom(&nsfh, v3); 1629 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 1630 nfsm_srvfillattr(&va, fp); 1631 } 1632 return (0); 1633 nfsmout: 1634 if (dirp) 1635 vrele(dirp); 1636 if (abort) { 1637 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1638 if (nd.ni_dvp == nd.ni_vp) 1639 vrele(nd.ni_dvp); 1640 else 1641 vput(nd.ni_dvp); 1642 if (nd.ni_vp) 1643 vput(nd.ni_vp); 1644 } 1645 if (nd.ni_pathbuf != NULL) { 1646 pathbuf_destroy(nd.ni_pathbuf); 1647 nd.ni_pathbuf = NULL; 1648 } 1649 return (error); 1650 } 1651 1652 /* 1653 * nfs v3 mknod service 1654 */ 1655 int 1656 nfsrv_mknod(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 1657 { 1658 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1659 struct mbuf *nam = nfsd->nd_nam; 1660 char *dpos = nfsd->nd_dpos; 1661 kauth_cred_t cred = nfsd->nd_cr; 1662 struct vattr va, dirfor, diraft; 1663 u_int32_t *tl; 1664 struct nameidata nd; 1665 int32_t t1; 1666 char *bpos; 1667 int error = 0, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 1668 int abort = 0; 1669 u_int32_t major, minor; 1670 enum vtype vtyp; 1671 char *cp2; 1672 struct mbuf *mb, *mreq __unused; 1673 struct vnode *vp, *dirp = (struct vnode *)0; 1674 nfsrvfh_t nsfh; 1675 u_quad_t frev; 1676 1677 nd.ni_cnd.cn_nameiop = 0; 1678 nfsm_srvmtofh(&nsfh); 1679 nfsm_srvnamesiz(len); 1680 nd.ni_cnd.cn_cred = cred; 1681 nd.ni_cnd.cn_nameiop = CREATE; 1682 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 1683 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 1684 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 1685 if (dirp) 1686 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); 1687 if (error) { 1688 nfsm_reply(NFSX_WCCDATA(1)); 1689 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1690 if (dirp) 1691 vrele(dirp); 1692 if (nd.ni_pathbuf != NULL) { 1693 pathbuf_destroy(nd.ni_pathbuf); 1694 nd.ni_pathbuf = NULL; 1695 } 1696 return (0); 1697 } 1698 abort = 1; 1699 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1700 vtyp = nfsv3tov_type(*tl); 1701 if (vtyp != VCHR && vtyp != VBLK && vtyp != VSOCK && vtyp != VFIFO) { 1702 error = NFSERR_BADTYPE; 1703 goto abort; 1704 } 1705 vattr_null(&va); 1706 va.va_mode = 0; 1707 nfsm_srvsattr(&va); 1708 if (vtyp == VCHR || vtyp == VBLK) { 1709 dev_t rdev; 1710 1711 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1712 major = fxdr_unsigned(u_int32_t, *tl++); 1713 minor = fxdr_unsigned(u_int32_t, *tl); 1714 rdev = makedev(major, minor); 1715 if (major(rdev) != major || minor(rdev) != minor) { 1716 error = EINVAL; 1717 goto abort; 1718 } 1719 va.va_rdev = rdev; 1720 } 1721 1722 /* 1723 * Iff doesn't exist, create it. 1724 */ 1725 if (nd.ni_vp) { 1726 error = EEXIST; 1727 abort: 1728 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1729 if (nd.ni_vp) 1730 vput(nd.ni_vp); 1731 if (nd.ni_pathbuf != NULL) { 1732 pathbuf_destroy(nd.ni_pathbuf); 1733 nd.ni_pathbuf = NULL; 1734 } 1735 goto out; 1736 } 1737 va.va_type = vtyp; 1738 if (vtyp == VSOCK) { 1739 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1740 error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1741 } else { 1742 if (va.va_type != VFIFO && 1743 (error = kauth_authorize_system(cred, 1744 KAUTH_SYSTEM_MKNOD, 0, NULL, NULL, NULL))) { 1745 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1746 vput(nd.ni_dvp); 1747 goto out; 1748 } 1749 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1750 error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1751 if (error) 1752 goto out; 1753 } 1754 if (!error) { 1755 vn_lock(nd.ni_vp, LK_EXCLUSIVE | LK_RETRY); 1756 } 1757 out: 1758 vp = nd.ni_vp; 1759 if (!error) { 1760 error = nfsrv_composefh(vp, &nsfh, true); 1761 if (!error) 1762 error = VOP_GETATTR(vp, &va, cred); 1763 vput(vp); 1764 } 1765 if (nd.ni_dvp == nd.ni_vp) 1766 vrele(nd.ni_dvp); 1767 else 1768 vput(nd.ni_dvp); 1769 if (dirp) { 1770 vn_lock(dirp, LK_SHARED | LK_RETRY); 1771 diraft_ret = VOP_GETATTR(dirp, &diraft, cred); 1772 VOP_UNLOCK(dirp); 1773 vrele(dirp); 1774 dirp = NULL; 1775 } 1776 if (nd.ni_pathbuf != NULL) { 1777 pathbuf_destroy(nd.ni_pathbuf); 1778 nd.ni_pathbuf = NULL; 1779 } 1780 abort = 0; 1781 nfsm_reply(NFSX_SRVFH(&nsfh, true) + NFSX_POSTOPATTR(1) + 1782 NFSX_WCCDATA(1)); 1783 if (!error) { 1784 nfsm_srvpostop_fh(&nsfh); 1785 nfsm_srvpostop_attr(0, &va); 1786 } 1787 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1788 return (0); 1789 nfsmout: 1790 if (abort) { 1791 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1792 if (nd.ni_dvp == nd.ni_vp) 1793 vrele(nd.ni_dvp); 1794 else 1795 vput(nd.ni_dvp); 1796 if (nd.ni_vp) 1797 vput(nd.ni_vp); 1798 } 1799 if (nd.ni_pathbuf != NULL) { 1800 pathbuf_destroy(nd.ni_pathbuf); 1801 nd.ni_pathbuf = NULL; 1802 } 1803 if (dirp) 1804 vrele(dirp); 1805 return (error); 1806 } 1807 1808 /* 1809 * nfs remove service 1810 */ 1811 int 1812 nfsrv_remove(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 1813 { 1814 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1815 struct mbuf *nam = nfsd->nd_nam; 1816 char *dpos = nfsd->nd_dpos; 1817 kauth_cred_t cred = nfsd->nd_cr; 1818 struct nameidata nd; 1819 u_int32_t *tl; 1820 int32_t t1; 1821 char *bpos; 1822 int error = 0, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 1823 int v3 = (nfsd->nd_flag & ND_NFSV3); 1824 char *cp2; 1825 struct mbuf *mb, *mreq __unused; 1826 struct vnode *vp, *dirp; 1827 struct vattr dirfor, diraft; 1828 nfsrvfh_t nsfh; 1829 u_quad_t frev; 1830 1831 #ifndef nolint 1832 vp = (struct vnode *)0; 1833 #endif 1834 nfsm_srvmtofh(&nsfh); 1835 nfsm_srvnamesiz(len); 1836 nd.ni_cnd.cn_cred = cred; 1837 nd.ni_cnd.cn_nameiop = DELETE; 1838 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 1839 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 1840 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 1841 if (error == 0 && dirp && v3) { 1842 if (nd.ni_dvp == nd.ni_vp) 1843 vn_lock(dirp, LK_SHARED | LK_RETRY); 1844 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); 1845 if (nd.ni_dvp == nd.ni_vp) 1846 VOP_UNLOCK(dirp); 1847 } 1848 if (!error) { 1849 vp = nd.ni_vp; 1850 if (vp->v_type == VDIR) { 1851 error = EPERM; 1852 goto out; 1853 } 1854 /* 1855 * The root of a mounted filesystem cannot be deleted. 1856 */ 1857 if (vp->v_vflag & VV_ROOT) { 1858 error = EBUSY; 1859 } 1860 out: 1861 if (!error) { 1862 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1863 nqsrv_getl(vp, ND_WRITE); 1864 error = VOP_REMOVE(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); 1865 vput(nd.ni_dvp); 1866 } else { 1867 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1868 if (nd.ni_dvp == vp) 1869 vrele(nd.ni_dvp); 1870 else 1871 vput(nd.ni_dvp); 1872 vput(vp); 1873 } 1874 } 1875 if (nd.ni_pathbuf != NULL) { 1876 pathbuf_destroy(nd.ni_pathbuf); 1877 nd.ni_pathbuf = NULL; 1878 } 1879 if (dirp) { 1880 if (v3) { 1881 vn_lock(dirp, LK_SHARED | LK_RETRY); 1882 diraft_ret = VOP_GETATTR(dirp, &diraft, cred); 1883 VOP_UNLOCK(dirp); 1884 } 1885 vrele(dirp); 1886 } 1887 nfsm_reply(NFSX_WCCDATA(v3)); 1888 if (v3) { 1889 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1890 return (0); 1891 } 1892 nfsm_srvdone; 1893 } 1894 1895 /* 1896 * nfs rename service 1897 */ 1898 int 1899 nfsrv_rename(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 1900 { 1901 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1902 struct mbuf *nam = nfsd->nd_nam; 1903 char *dpos = nfsd->nd_dpos; 1904 kauth_cred_t cred = nfsd->nd_cr; 1905 u_int32_t *tl; 1906 int32_t t1; 1907 char *bpos; 1908 int error = 0, cache = 0, fdirfor_ret = 1, fdiraft_ret = 1; 1909 uint32_t len, len2; 1910 int tdirfor_ret = 1, tdiraft_ret = 1; 1911 int v3 = (nfsd->nd_flag & ND_NFSV3); 1912 char *cp2; 1913 struct mbuf *mb, *mreq __unused; 1914 struct nameidata fromnd, tond; 1915 struct vnode *fvp, *tvp, *tdvp; 1916 struct vnode *fdirp = NULL, *tdirp = NULL; 1917 struct mount *localfs = NULL; 1918 struct vattr fdirfor, fdiraft, tdirfor, tdiraft; 1919 nfsrvfh_t fnsfh, tnsfh; 1920 u_quad_t frev; 1921 uid_t saved_uid; 1922 1923 #ifndef nolint 1924 fvp = (struct vnode *)0; 1925 #endif 1926 fromnd.ni_cnd.cn_nameiop = 0; 1927 tond.ni_cnd.cn_nameiop = 0; 1928 nfsm_srvmtofh(&fnsfh); 1929 nfsm_srvnamesiz(len); 1930 /* 1931 * Remember our original uid so that we can reset cr_uid before 1932 * the second nfs_namei() call, in case it is remapped. 1933 */ 1934 saved_uid = kauth_cred_geteuid(cred); 1935 fromnd.ni_cnd.cn_cred = cred; 1936 fromnd.ni_cnd.cn_nameiop = DELETE; 1937 fromnd.ni_cnd.cn_flags = LOCKPARENT; 1938 error = nfs_namei(&fromnd, &fnsfh, len, slp, nam, &md, 1939 &dpos, &fdirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 1940 if (error == 0 && fdirp && v3) { 1941 if (fromnd.ni_dvp == fromnd.ni_vp) 1942 vn_lock(fdirp, LK_SHARED | LK_RETRY); 1943 fdirfor_ret = VOP_GETATTR(fdirp, &fdirfor, cred); 1944 if (fromnd.ni_dvp == fromnd.ni_vp) 1945 VOP_UNLOCK(fdirp); 1946 } 1947 if (error) { 1948 fromnd.ni_cnd.cn_nameiop = 0; 1949 nfsm_reply(2 * NFSX_WCCDATA(v3)); 1950 nfsm_srvwcc_data(fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft); 1951 nfsm_srvwcc_data(tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft); 1952 if (fdirp) 1953 vrele(fdirp); 1954 if (fromnd.ni_pathbuf != NULL) { 1955 pathbuf_destroy(fromnd.ni_pathbuf); 1956 } 1957 return (0); 1958 } 1959 if (fromnd.ni_dvp != fromnd.ni_vp) { 1960 VOP_UNLOCK(fromnd.ni_dvp); 1961 } 1962 fvp = fromnd.ni_vp; 1963 1964 localfs = fvp->v_mount; 1965 error = VFS_RENAMELOCK_ENTER(localfs); 1966 if (error) { 1967 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 1968 vrele(fromnd.ni_dvp); 1969 vrele(fvp); 1970 goto out1; 1971 } 1972 1973 /* Copied, regrettably, from vfs_syscalls.c (q.v.) */ 1974 vrele(fvp); 1975 if ((fromnd.ni_cnd.cn_namelen == 1 && 1976 fromnd.ni_cnd.cn_nameptr[0] == '.') || 1977 (fromnd.ni_cnd.cn_namelen == 2 && 1978 fromnd.ni_cnd.cn_nameptr[0] == '.' && 1979 fromnd.ni_cnd.cn_nameptr[1] == '.')) { 1980 error = EINVAL; 1981 VFS_RENAMELOCK_EXIT(localfs); 1982 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 1983 vrele(fromnd.ni_dvp); 1984 goto out1; 1985 } 1986 vn_lock(fromnd.ni_dvp, LK_EXCLUSIVE | LK_RETRY); 1987 error = relookup(fromnd.ni_dvp, &fromnd.ni_vp, &fromnd.ni_cnd, 0); 1988 if (error) { 1989 VOP_UNLOCK(fromnd.ni_dvp); 1990 VFS_RENAMELOCK_EXIT(localfs); 1991 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 1992 vrele(fromnd.ni_dvp); 1993 goto out1; 1994 } 1995 VOP_UNLOCK(fromnd.ni_vp); 1996 if (fromnd.ni_dvp != fromnd.ni_vp) 1997 VOP_UNLOCK(fromnd.ni_dvp); 1998 fvp = fromnd.ni_vp; 1999 2000 nfsm_srvmtofh(&tnsfh); 2001 if (v3) { 2002 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 2003 len2 = fxdr_unsigned(uint32_t, *tl); 2004 /* len2 will be checked by nfs_namei */ 2005 } 2006 else { 2007 /* NFSv2 */ 2008 nfsm_strsiz(len2, NFS_MAXNAMLEN); 2009 } 2010 kauth_cred_seteuid(cred, saved_uid); 2011 tond.ni_cnd.cn_cred = cred; 2012 tond.ni_cnd.cn_nameiop = RENAME; 2013 tond.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF | NOCACHE; 2014 error = nfs_namei(&tond, &tnsfh, len2, slp, nam, &md, 2015 &dpos, &tdirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 2016 if (tdirp && v3) { 2017 tdirfor_ret = VOP_GETATTR(tdirp, &tdirfor, cred); 2018 } 2019 if (error) { 2020 VFS_RENAMELOCK_EXIT(localfs); 2021 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 2022 vrele(fromnd.ni_dvp); 2023 vrele(fvp); 2024 goto out1; 2025 } 2026 tdvp = tond.ni_dvp; 2027 tvp = tond.ni_vp; 2028 if (tvp != NULL) { 2029 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 2030 if (v3) 2031 error = EEXIST; 2032 else 2033 error = EISDIR; 2034 goto out; 2035 } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 2036 if (v3) 2037 error = EEXIST; 2038 else 2039 error = ENOTDIR; 2040 goto out; 2041 } 2042 if (tvp->v_type == VDIR && tvp->v_mountedhere) { 2043 if (v3) 2044 error = EXDEV; 2045 else 2046 error = ENOTEMPTY; 2047 goto out; 2048 } 2049 } 2050 if (fvp->v_type == VDIR && fvp->v_mountedhere) { 2051 if (v3) 2052 error = EXDEV; 2053 else 2054 error = ENOTEMPTY; 2055 goto out; 2056 } 2057 if (fvp->v_mount != tdvp->v_mount) { 2058 if (v3) 2059 error = EXDEV; 2060 else 2061 error = ENOTEMPTY; 2062 goto out; 2063 } 2064 if (fvp == tdvp) { 2065 if (v3) 2066 error = EINVAL; 2067 else 2068 error = ENOTEMPTY; 2069 } 2070 /* 2071 * If source is the same as the destination (that is the 2072 * same vnode with the same name in the same directory), 2073 * then there is nothing to do. 2074 */ 2075 if (fvp == tvp && fromnd.ni_dvp == tdvp && 2076 fromnd.ni_cnd.cn_namelen == tond.ni_cnd.cn_namelen && 2077 !memcmp(fromnd.ni_cnd.cn_nameptr, tond.ni_cnd.cn_nameptr, 2078 fromnd.ni_cnd.cn_namelen)) 2079 error = -1; 2080 out: 2081 if (!error) { 2082 nqsrv_getl(fromnd.ni_dvp, ND_WRITE); 2083 nqsrv_getl(tdvp, ND_WRITE); 2084 if (tvp) { 2085 nqsrv_getl(tvp, ND_WRITE); 2086 } 2087 error = VOP_RENAME(fromnd.ni_dvp, fromnd.ni_vp, &fromnd.ni_cnd, 2088 tond.ni_dvp, tond.ni_vp, &tond.ni_cnd); 2089 VFS_RENAMELOCK_EXIT(localfs); 2090 } else { 2091 VOP_ABORTOP(tond.ni_dvp, &tond.ni_cnd); 2092 if (tdvp == tvp) 2093 vrele(tdvp); 2094 else 2095 vput(tdvp); 2096 if (tvp) 2097 vput(tvp); 2098 VFS_RENAMELOCK_EXIT(localfs); 2099 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 2100 vrele(fromnd.ni_dvp); 2101 vrele(fvp); 2102 if (error == -1) 2103 error = 0; 2104 } 2105 if (tond.ni_pathbuf != NULL) { 2106 pathbuf_destroy(tond.ni_pathbuf); 2107 tond.ni_pathbuf = NULL; 2108 } 2109 tond.ni_cnd.cn_nameiop = 0; 2110 out1: 2111 if (fdirp) { 2112 if (v3) { 2113 vn_lock(fdirp, LK_SHARED | LK_RETRY); 2114 fdiraft_ret = VOP_GETATTR(fdirp, &fdiraft, cred); 2115 VOP_UNLOCK(fdirp); 2116 } 2117 vrele(fdirp); 2118 fdirp = NULL; 2119 } 2120 if (tdirp) { 2121 if (v3) { 2122 vn_lock(tdirp, LK_SHARED | LK_RETRY); 2123 tdiraft_ret = VOP_GETATTR(tdirp, &tdiraft, cred); 2124 VOP_UNLOCK(tdirp); 2125 } 2126 vrele(tdirp); 2127 tdirp = NULL; 2128 } 2129 pathbuf_destroy(fromnd.ni_pathbuf); 2130 fromnd.ni_pathbuf = NULL; 2131 fromnd.ni_cnd.cn_nameiop = 0; 2132 localfs = NULL; 2133 nfsm_reply(2 * NFSX_WCCDATA(v3)); 2134 if (v3) { 2135 nfsm_srvwcc_data(fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft); 2136 nfsm_srvwcc_data(tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft); 2137 } 2138 return (0); 2139 2140 nfsmout: 2141 if (fdirp) 2142 vrele(fdirp); 2143 #ifdef notdef 2144 if (tdirp) 2145 vrele(tdirp); 2146 #endif 2147 if (tond.ni_cnd.cn_nameiop) { 2148 if (tond.ni_pathbuf != NULL) { 2149 pathbuf_destroy(tond.ni_pathbuf); 2150 tond.ni_pathbuf = NULL; 2151 } 2152 } 2153 if (localfs) { 2154 VFS_RENAMELOCK_EXIT(localfs); 2155 } 2156 if (fromnd.ni_cnd.cn_nameiop) { 2157 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 2158 if (fromnd.ni_pathbuf != NULL) { 2159 pathbuf_destroy(fromnd.ni_pathbuf); 2160 fromnd.ni_pathbuf = NULL; 2161 } 2162 vrele(fromnd.ni_dvp); 2163 vrele(fvp); 2164 } 2165 return (error); 2166 } 2167 2168 /* 2169 * nfs link service 2170 */ 2171 int 2172 nfsrv_link(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 2173 { 2174 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2175 struct mbuf *nam = nfsd->nd_nam; 2176 char *dpos = nfsd->nd_dpos; 2177 kauth_cred_t cred = nfsd->nd_cr; 2178 struct nameidata nd; 2179 u_int32_t *tl; 2180 int32_t t1; 2181 char *bpos; 2182 int error = 0, rdonly, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 2183 int getret = 1, v3 = (nfsd->nd_flag & ND_NFSV3); 2184 char *cp2; 2185 struct mbuf *mb, *mreq __unused; 2186 struct vnode *vp, *xp, *dirp = (struct vnode *)0; 2187 struct vattr dirfor, diraft, at; 2188 nfsrvfh_t nsfh, dnsfh; 2189 u_quad_t frev; 2190 2191 nfsm_srvmtofh(&nsfh); 2192 nfsm_srvmtofh(&dnsfh); 2193 nfsm_srvnamesiz(len); 2194 error = nfsrv_fhtovp(&nsfh, false, &vp, cred, slp, nam, 2195 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 2196 if (error) { 2197 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2198 nfsm_srvpostop_attr(getret, &at); 2199 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2200 return (0); 2201 } 2202 if (vp->v_type == VDIR) { 2203 error = EPERM; 2204 goto out1; 2205 } 2206 nd.ni_cnd.cn_cred = cred; 2207 nd.ni_cnd.cn_nameiop = CREATE; 2208 nd.ni_cnd.cn_flags = LOCKPARENT; 2209 error = nfs_namei(&nd, &dnsfh, len, slp, nam, &md, &dpos, 2210 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 2211 if (dirp && v3) { 2212 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); 2213 } 2214 if (error) 2215 goto out1; 2216 xp = nd.ni_vp; 2217 if (xp != NULL) { 2218 error = EEXIST; 2219 goto out; 2220 } 2221 xp = nd.ni_dvp; 2222 if (vp->v_mount != xp->v_mount) 2223 error = EXDEV; 2224 out: 2225 if (!error) { 2226 nqsrv_getl(vp, ND_WRITE); 2227 nqsrv_getl(xp, ND_WRITE); 2228 error = VOP_LINK(nd.ni_dvp, vp, &nd.ni_cnd); 2229 if (nd.ni_dvp != nd.ni_vp) 2230 VOP_UNLOCK(nd.ni_dvp); 2231 vrele(nd.ni_dvp); 2232 } else { 2233 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2234 if (nd.ni_dvp == nd.ni_vp) 2235 vrele(nd.ni_dvp); 2236 else 2237 vput(nd.ni_dvp); 2238 if (nd.ni_vp) 2239 vrele(nd.ni_vp); 2240 } 2241 out1: 2242 if (v3) { 2243 vn_lock(vp, LK_SHARED | LK_RETRY); 2244 getret = VOP_GETATTR(vp, &at, cred); 2245 VOP_UNLOCK(vp); 2246 } 2247 if (dirp) { 2248 if (v3) { 2249 vn_lock(dirp, LK_SHARED | LK_RETRY); 2250 diraft_ret = VOP_GETATTR(dirp, &diraft, cred); 2251 VOP_UNLOCK(dirp); 2252 } 2253 vrele(dirp); 2254 } 2255 vrele(vp); 2256 if (nd.ni_pathbuf != NULL) { 2257 pathbuf_destroy(nd.ni_pathbuf); 2258 nd.ni_pathbuf = NULL; 2259 } 2260 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2261 if (v3) { 2262 nfsm_srvpostop_attr(getret, &at); 2263 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2264 return (0); 2265 } 2266 nfsm_srvdone; 2267 } 2268 2269 /* 2270 * nfs symbolic link service 2271 */ 2272 int 2273 nfsrv_symlink(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 2274 { 2275 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2276 struct mbuf *nam = nfsd->nd_nam; 2277 char *dpos = nfsd->nd_dpos; 2278 kauth_cred_t cred = nfsd->nd_cr; 2279 struct vattr va, dirfor, diraft; 2280 struct nameidata nd; 2281 u_int32_t *tl; 2282 int32_t t1; 2283 struct nfsv2_sattr *sp; 2284 char *bpos, *pathcp = NULL, *cp2; 2285 struct uio io; 2286 struct iovec iv; 2287 int error = 0, cache = 0, dirfor_ret = 1, diraft_ret = 1, abort = 0; 2288 uint32_t len, len2; 2289 int v3 = (nfsd->nd_flag & ND_NFSV3); 2290 struct mbuf *mb, *mreq __unused; 2291 struct vnode *dirp = (struct vnode *)0; 2292 nfsrvfh_t nsfh; 2293 u_quad_t frev; 2294 2295 nd.ni_cnd.cn_nameiop = 0; 2296 nfsm_srvmtofh(&nsfh); 2297 nfsm_srvnamesiz(len); 2298 nd.ni_cnd.cn_cred = cred; 2299 nd.ni_cnd.cn_nameiop = CREATE; 2300 nd.ni_cnd.cn_flags = LOCKPARENT; 2301 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 2302 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 2303 if (dirp && v3) { 2304 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); 2305 } 2306 if (error) 2307 goto out; 2308 abort = 1; 2309 vattr_null(&va); 2310 va.va_type = VLNK; 2311 if (v3) { 2312 va.va_mode = 0; 2313 nfsm_srvsattr(&va); 2314 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 2315 len2 = fxdr_unsigned(uint32_t, *tl); 2316 if (len2 > PATH_MAX) { 2317 /* XXX should check _PC_NO_TRUNC */ 2318 error = ENAMETOOLONG; 2319 goto abortop; 2320 } 2321 } 2322 else { 2323 /* NFSv2 */ 2324 nfsm_strsiz(len2, NFS_MAXPATHLEN); 2325 } 2326 pathcp = malloc(len2 + 1, M_TEMP, M_WAITOK); 2327 iv.iov_base = pathcp; 2328 iv.iov_len = len2; 2329 io.uio_resid = len2; 2330 io.uio_offset = 0; 2331 io.uio_iov = &iv; 2332 io.uio_iovcnt = 1; 2333 io.uio_rw = UIO_READ; 2334 UIO_SETUP_SYSSPACE(&io); 2335 nfsm_mtouio(&io, len2); 2336 if (!v3) { 2337 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2338 va.va_mode = fxdr_unsigned(u_int16_t, sp->sa_mode); 2339 } 2340 *(pathcp + len2) = '\0'; 2341 if (nd.ni_vp) { 2342 error = EEXIST; 2343 abortop: 2344 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2345 if (nd.ni_dvp == nd.ni_vp) 2346 vrele(nd.ni_dvp); 2347 else 2348 vput(nd.ni_dvp); 2349 if (nd.ni_vp) 2350 vrele(nd.ni_vp); 2351 goto out; 2352 } 2353 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2354 error = VOP_SYMLINK(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va, pathcp); 2355 if (!error) { 2356 if (v3) { 2357 vn_lock(nd.ni_vp, LK_SHARED | LK_RETRY); 2358 error = nfsrv_composefh(nd.ni_vp, &nsfh, v3); 2359 if (!error) 2360 error = VOP_GETATTR(nd.ni_vp, &va, cred); 2361 vput(nd.ni_vp); 2362 } else { 2363 vrele(nd.ni_vp); 2364 } 2365 } 2366 vput(nd.ni_dvp); 2367 out: 2368 if (pathcp) 2369 free(pathcp, M_TEMP); 2370 if (dirp) { 2371 if (v3) { 2372 vn_lock(dirp, LK_SHARED | LK_RETRY); 2373 diraft_ret = VOP_GETATTR(dirp, &diraft, cred); 2374 VOP_UNLOCK(dirp); 2375 } 2376 vrele(dirp); 2377 dirp = NULL; 2378 } 2379 if (nd.ni_pathbuf != NULL) { 2380 pathbuf_destroy(nd.ni_pathbuf); 2381 nd.ni_pathbuf = NULL; 2382 } 2383 abort = 0; 2384 nfsm_reply(NFSX_SRVFH(&nsfh, v3) + NFSX_POSTOPATTR(v3) + 2385 NFSX_WCCDATA(v3)); 2386 if (v3) { 2387 if (!error) { 2388 nfsm_srvpostop_fh(&nsfh); 2389 nfsm_srvpostop_attr(0, &va); 2390 } 2391 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2392 } 2393 return (0); 2394 nfsmout: 2395 if (abort) { 2396 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2397 if (nd.ni_dvp == nd.ni_vp) 2398 vrele(nd.ni_dvp); 2399 else 2400 vput(nd.ni_dvp); 2401 if (nd.ni_vp) 2402 vrele(nd.ni_vp); 2403 if (nd.ni_pathbuf != NULL) { 2404 pathbuf_destroy(nd.ni_pathbuf); 2405 nd.ni_pathbuf = NULL; 2406 } 2407 } 2408 if (dirp) 2409 vrele(dirp); 2410 if (pathcp) 2411 free(pathcp, M_TEMP); 2412 return (error); 2413 } 2414 2415 /* 2416 * nfs mkdir service 2417 */ 2418 int 2419 nfsrv_mkdir(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 2420 { 2421 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2422 struct mbuf *nam = nfsd->nd_nam; 2423 char *dpos = nfsd->nd_dpos; 2424 kauth_cred_t cred = nfsd->nd_cr; 2425 struct vattr va, dirfor, diraft; 2426 struct nfs_fattr *fp; 2427 struct nameidata nd; 2428 char *cp; 2429 u_int32_t *tl; 2430 int32_t t1; 2431 char *bpos; 2432 int error = 0, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 2433 int abort = 0; 2434 int v3 = (nfsd->nd_flag & ND_NFSV3); 2435 char *cp2; 2436 struct mbuf *mb, *mreq __unused; 2437 struct vnode *vp, *dirp = (struct vnode *)0; 2438 nfsrvfh_t nsfh; 2439 u_quad_t frev; 2440 2441 nfsm_srvmtofh(&nsfh); 2442 nfsm_srvnamesiz(len); 2443 nd.ni_cnd.cn_cred = cred; 2444 nd.ni_cnd.cn_nameiop = CREATE; 2445 nd.ni_cnd.cn_flags = LOCKPARENT; 2446 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 2447 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 2448 if (dirp && v3) { 2449 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); 2450 } 2451 if (error) { 2452 if (nd.ni_pathbuf != NULL) { 2453 pathbuf_destroy(nd.ni_pathbuf); 2454 nd.ni_pathbuf = NULL; 2455 } 2456 nfsm_reply(NFSX_WCCDATA(v3)); 2457 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2458 if (dirp) 2459 vrele(dirp); 2460 return (0); 2461 } 2462 abort = 1; 2463 vattr_null(&va); 2464 if (v3) { 2465 va.va_mode = 0; 2466 nfsm_srvsattr(&va); 2467 } else { 2468 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2469 va.va_mode = nfstov_mode(*tl++); 2470 } 2471 va.va_type = VDIR; 2472 vp = nd.ni_vp; 2473 if (vp != NULL) { 2474 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2475 if (nd.ni_dvp == vp) 2476 vrele(nd.ni_dvp); 2477 else 2478 vput(nd.ni_dvp); 2479 vrele(vp); 2480 error = EEXIST; 2481 goto out; 2482 } 2483 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2484 error = VOP_MKDIR(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 2485 if (!error) { 2486 vp = nd.ni_vp; 2487 vn_lock(vp, LK_SHARED | LK_RETRY); 2488 error = nfsrv_composefh(vp, &nsfh, v3); 2489 if (!error) 2490 error = VOP_GETATTR(vp, &va, cred); 2491 vput(vp); 2492 } 2493 vput(nd.ni_dvp); 2494 out: 2495 if (dirp) { 2496 if (v3) { 2497 vn_lock(dirp, LK_SHARED | LK_RETRY); 2498 diraft_ret = VOP_GETATTR(dirp, &diraft, cred); 2499 VOP_UNLOCK(dirp); 2500 } 2501 vrele(dirp); 2502 dirp = NULL; 2503 } 2504 if (nd.ni_pathbuf != NULL) { 2505 pathbuf_destroy(nd.ni_pathbuf); 2506 nd.ni_pathbuf = NULL; 2507 } 2508 abort = 0; 2509 nfsm_reply(NFSX_SRVFH(&nsfh, v3) + NFSX_POSTOPATTR(v3) + 2510 NFSX_WCCDATA(v3)); 2511 if (v3) { 2512 if (!error) { 2513 nfsm_srvpostop_fh(&nsfh); 2514 nfsm_srvpostop_attr(0, &va); 2515 } 2516 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2517 } else { 2518 nfsm_srvfhtom(&nsfh, v3); 2519 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 2520 nfsm_srvfillattr(&va, fp); 2521 } 2522 return (0); 2523 nfsmout: 2524 if (abort) { 2525 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2526 if (nd.ni_dvp == nd.ni_vp) 2527 vrele(nd.ni_dvp); 2528 else 2529 vput(nd.ni_dvp); 2530 if (nd.ni_vp) 2531 vrele(nd.ni_vp); 2532 if (nd.ni_pathbuf != NULL) { 2533 pathbuf_destroy(nd.ni_pathbuf); 2534 nd.ni_pathbuf = NULL; 2535 } 2536 } 2537 if (dirp) 2538 vrele(dirp); 2539 return (error); 2540 } 2541 2542 /* 2543 * nfs rmdir service 2544 */ 2545 int 2546 nfsrv_rmdir(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 2547 { 2548 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2549 struct mbuf *nam = nfsd->nd_nam; 2550 char *dpos = nfsd->nd_dpos; 2551 kauth_cred_t cred = nfsd->nd_cr; 2552 u_int32_t *tl; 2553 int32_t t1; 2554 char *bpos; 2555 int error = 0, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 2556 int v3 = (nfsd->nd_flag & ND_NFSV3); 2557 char *cp2; 2558 struct mbuf *mb, *mreq __unused; 2559 struct vnode *vp, *dirp = (struct vnode *)0; 2560 struct vattr dirfor, diraft; 2561 nfsrvfh_t nsfh; 2562 struct nameidata nd; 2563 u_quad_t frev; 2564 2565 nfsm_srvmtofh(&nsfh); 2566 nfsm_srvnamesiz(len); 2567 nd.ni_cnd.cn_cred = cred; 2568 nd.ni_cnd.cn_nameiop = DELETE; 2569 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 2570 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 2571 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 2572 if (dirp && v3) { 2573 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); 2574 } 2575 if (error) { 2576 if (nd.ni_pathbuf != NULL) { 2577 pathbuf_destroy(nd.ni_pathbuf); 2578 nd.ni_pathbuf = NULL; 2579 } 2580 nfsm_reply(NFSX_WCCDATA(v3)); 2581 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2582 if (dirp) 2583 vrele(dirp); 2584 return (0); 2585 } 2586 vp = nd.ni_vp; 2587 if (vp->v_type != VDIR) { 2588 error = ENOTDIR; 2589 goto out; 2590 } 2591 /* 2592 * No rmdir "." please. 2593 */ 2594 if (nd.ni_dvp == vp) { 2595 error = EINVAL; 2596 goto out; 2597 } 2598 /* 2599 * The root of a mounted filesystem cannot be deleted. 2600 */ 2601 if (vp->v_vflag & VV_ROOT) 2602 error = EBUSY; 2603 out: 2604 if (!error) { 2605 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2606 nqsrv_getl(vp, ND_WRITE); 2607 error = VOP_RMDIR(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); 2608 vput(nd.ni_dvp); 2609 } else { 2610 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2611 if (nd.ni_dvp == nd.ni_vp) 2612 vrele(nd.ni_dvp); 2613 else 2614 vput(nd.ni_dvp); 2615 vput(vp); 2616 } 2617 if (nd.ni_pathbuf != NULL) { 2618 pathbuf_destroy(nd.ni_pathbuf); 2619 nd.ni_pathbuf = NULL; 2620 } 2621 if (dirp) { 2622 if (v3) { 2623 vn_lock(dirp, LK_SHARED | LK_RETRY); 2624 diraft_ret = VOP_GETATTR(dirp, &diraft, cred); 2625 VOP_UNLOCK(dirp); 2626 } 2627 vrele(dirp); 2628 } 2629 nfsm_reply(NFSX_WCCDATA(v3)); 2630 if (v3) { 2631 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2632 return (0); 2633 } 2634 nfsm_srvdone; 2635 } 2636 2637 /* 2638 * nfs readdir service 2639 * - mallocs what it thinks is enough to read 2640 * count rounded up to a multiple of NFS_SRVDIRBLKSIZ <= NFS_MAXREADDIR 2641 * - calls VOP_READDIR() 2642 * - loops around building the reply 2643 * if the output generated exceeds count break out of loop 2644 * The nfsm_clget macro is used here so that the reply will be packed 2645 * tightly in mbuf clusters. 2646 * - it only knows that it has encountered eof when the VOP_READDIR() 2647 * reads nothing 2648 * - as such one readdir rpc will return eof false although you are there 2649 * and then the next will return eof 2650 * - it trims out records with d_fileno == 0 2651 * this doesn't matter for Unix clients, but they might confuse clients 2652 * for other os'. 2653 * - it trims out records with d_type == DT_WHT 2654 * these cannot be seen through NFS (unless we extend the protocol) 2655 * NB: It is tempting to set eof to true if the VOP_READDIR() reads less 2656 * than requested, but this may not apply to all filesystems. For 2657 * example, client NFS does not { although it is never remote mounted 2658 * anyhow } 2659 * The alternate call nfsrv_readdirplus() does lookups as well. 2660 * PS: The NFS protocol spec. does not clarify what the "count" byte 2661 * argument is a count of.. just name strings and file id's or the 2662 * entire reply rpc or ... 2663 * I tried just file name and id sizes and it confused the Sun client, 2664 * so I am using the full rpc size now. The "paranoia.." comment refers 2665 * to including the status longwords that are not a part of the dir. 2666 * "entry" structures, but are in the rpc. 2667 */ 2668 2669 #define NFS_SRVDIRBLKSIZ 1024 2670 2671 struct flrep { 2672 nfsuint64 fl_off; 2673 u_int32_t fl_postopok; 2674 struct nfs_fattr fl_fattr; /* XXX: must be of fattr3 size */ 2675 u_int32_t fl_fhok; 2676 u_int32_t fl_fhsize; 2677 /* handle comes here, filled in dynamically */ 2678 }; 2679 2680 int 2681 nfsrv_readdir(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 2682 { 2683 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2684 struct mbuf *nam = nfsd->nd_nam; 2685 char *dpos = nfsd->nd_dpos; 2686 kauth_cred_t cred = nfsd->nd_cr; 2687 char *bp, *be; 2688 struct mbuf *mp; 2689 struct dirent *dp; 2690 char *cp; 2691 u_int32_t *tl; 2692 int32_t t1; 2693 char *bpos; 2694 struct mbuf *mb, *mreq __unused, *mp2; 2695 char *cpos, *cend, *cp2, *rbuf; 2696 struct vnode *vp; 2697 struct vattr at; 2698 nfsrvfh_t nsfh; 2699 struct uio io; 2700 struct iovec iv; 2701 int len, nlen, rem, xfer, tsiz, i, error = 0, getret = 1; 2702 int siz, cnt, fullsiz, eofflag, rdonly, cache = 0, ncookies; 2703 int v3 = (nfsd->nd_flag & ND_NFSV3); 2704 u_quad_t frev, off, toff; 2705 #ifdef NFS3_STRICTVERF 2706 u_quad_t verf; 2707 #endif 2708 off_t *cookies = NULL, *cookiep; 2709 nfsuint64 jar; 2710 2711 nfsm_srvmtofh(&nsfh); 2712 if (v3) { 2713 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 2714 toff = fxdr_hyper(tl); 2715 tl += 2; 2716 #ifdef NFS3_STRICTVERF 2717 verf = fxdr_hyper(tl); 2718 #endif 2719 tl += 2; 2720 } else { 2721 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2722 toff = fxdr_unsigned(u_quad_t, *tl++); 2723 } 2724 off = toff; 2725 cnt = fxdr_unsigned(int, *tl); 2726 siz = ((cnt + NFS_SRVDIRBLKSIZ - 1) & ~(NFS_SRVDIRBLKSIZ - 1)); 2727 xfer = NFS_SRVMAXDATA(nfsd); 2728 if (siz > xfer) 2729 siz = xfer; 2730 fullsiz = siz; 2731 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 2732 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 2733 if (!error && vp->v_type != VDIR) { 2734 error = ENOTDIR; 2735 vput(vp); 2736 } 2737 if (error) { 2738 nfsm_reply(NFSX_UNSIGNED); 2739 nfsm_srvpostop_attr(getret, &at); 2740 return (0); 2741 } 2742 nqsrv_getl(vp, ND_READ); 2743 if (v3) { 2744 error = getret = VOP_GETATTR(vp, &at, cred); 2745 #ifdef NFS3_STRICTVERF 2746 /* 2747 * XXX This check is too strict for Solaris 2.5 clients. 2748 */ 2749 if (!error && toff && verf != at.va_filerev) 2750 error = NFSERR_BAD_COOKIE; 2751 #endif 2752 } 2753 if (!error) 2754 error = nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 0); 2755 if (error) { 2756 vput(vp); 2757 nfsm_reply(NFSX_POSTOPATTR(v3)); 2758 nfsm_srvpostop_attr(getret, &at); 2759 return (0); 2760 } 2761 VOP_UNLOCK(vp); 2762 rbuf = malloc(siz, M_TEMP, M_WAITOK); 2763 again: 2764 iv.iov_base = rbuf; 2765 iv.iov_len = fullsiz; 2766 io.uio_iov = &iv; 2767 io.uio_iovcnt = 1; 2768 io.uio_offset = (off_t)off; 2769 io.uio_resid = fullsiz; 2770 io.uio_rw = UIO_READ; 2771 UIO_SETUP_SYSSPACE(&io); 2772 eofflag = 0; 2773 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2774 2775 error = VOP_READDIR(vp, &io, cred, &eofflag, &cookies, &ncookies); 2776 2777 off = (off_t)io.uio_offset; 2778 if (!cookies && !error) 2779 error = NFSERR_PERM; 2780 if (v3) { 2781 getret = VOP_GETATTR(vp, &at, cred); 2782 if (!error) 2783 error = getret; 2784 } 2785 2786 VOP_UNLOCK(vp); 2787 if (error) { 2788 vrele(vp); 2789 free((void *)rbuf, M_TEMP); 2790 if (cookies) 2791 free((void *)cookies, M_TEMP); 2792 nfsm_reply(NFSX_POSTOPATTR(v3)); 2793 nfsm_srvpostop_attr(getret, &at); 2794 return (0); 2795 } 2796 if (io.uio_resid) { 2797 siz -= io.uio_resid; 2798 2799 /* 2800 * If nothing read, return eof 2801 * rpc reply 2802 */ 2803 if (siz == 0) { 2804 vrele(vp); 2805 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_COOKIEVERF(v3) + 2806 2 * NFSX_UNSIGNED); 2807 if (v3) { 2808 nfsm_srvpostop_attr(getret, &at); 2809 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 2810 txdr_hyper(at.va_filerev, tl); 2811 tl += 2; 2812 } else 2813 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2814 *tl++ = nfs_false; 2815 *tl = nfs_true; 2816 free((void *)rbuf, M_TEMP); 2817 free((void *)cookies, M_TEMP); 2818 return (0); 2819 } 2820 } 2821 2822 /* 2823 * Check for degenerate cases of nothing useful read. 2824 * If so go try again 2825 */ 2826 cpos = rbuf; 2827 cend = rbuf + siz; 2828 dp = (struct dirent *)cpos; 2829 cookiep = cookies; 2830 2831 while (cpos < cend && ncookies > 0 && 2832 (dp->d_fileno == 0 || dp->d_type == DT_WHT)) { 2833 cpos += dp->d_reclen; 2834 dp = (struct dirent *)cpos; 2835 cookiep++; 2836 ncookies--; 2837 } 2838 if (cpos >= cend || ncookies == 0) { 2839 toff = off; 2840 siz = fullsiz; 2841 free(cookies, M_TEMP); 2842 cookies = NULL; 2843 goto again; 2844 } 2845 2846 len = 3 * NFSX_UNSIGNED; /* paranoia, probably can be 0 */ 2847 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_COOKIEVERF(v3) + siz); 2848 if (v3) { 2849 nfsm_srvpostop_attr(getret, &at); 2850 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2851 txdr_hyper(at.va_filerev, tl); 2852 } 2853 mp = mp2 = mb; 2854 bp = bpos; 2855 be = bp + M_TRAILINGSPACE(mp); 2856 2857 /* Loop through the records and build reply */ 2858 while (cpos < cend && ncookies > 0) { 2859 if (dp->d_fileno != 0 && dp->d_type != DT_WHT) { 2860 nlen = dp->d_namlen; 2861 rem = nfsm_rndup(nlen)-nlen; 2862 len += (4 * NFSX_UNSIGNED + nlen + rem); 2863 if (v3) 2864 len += 2 * NFSX_UNSIGNED; 2865 if (len > cnt) { 2866 eofflag = 0; 2867 break; 2868 } 2869 /* 2870 * Build the directory record xdr from 2871 * the dirent entry. 2872 */ 2873 nfsm_clget; 2874 *tl = nfs_true; 2875 bp += NFSX_UNSIGNED; 2876 if (v3) { 2877 nfsm_clget; 2878 *tl = txdr_unsigned(dp->d_fileno >> 32); 2879 bp += NFSX_UNSIGNED; 2880 } 2881 nfsm_clget; 2882 *tl = txdr_unsigned(dp->d_fileno); 2883 bp += NFSX_UNSIGNED; 2884 nfsm_clget; 2885 *tl = txdr_unsigned(nlen); 2886 bp += NFSX_UNSIGNED; 2887 2888 /* And loop around copying the name */ 2889 xfer = nlen; 2890 cp = dp->d_name; 2891 while (xfer > 0) { 2892 nfsm_clget; 2893 if ((bp+xfer) > be) 2894 tsiz = be-bp; 2895 else 2896 tsiz = xfer; 2897 memcpy(bp, cp, tsiz); 2898 bp += tsiz; 2899 xfer -= tsiz; 2900 if (xfer > 0) 2901 cp += tsiz; 2902 } 2903 /* And null pad to an int32_t boundary */ 2904 for (i = 0; i < rem; i++) 2905 *bp++ = '\0'; 2906 nfsm_clget; 2907 2908 /* Finish off the record */ 2909 txdr_hyper(*cookiep, &jar); 2910 if (v3) { 2911 *tl = jar.nfsuquad[0]; 2912 bp += NFSX_UNSIGNED; 2913 nfsm_clget; 2914 } 2915 *tl = jar.nfsuquad[1]; 2916 bp += NFSX_UNSIGNED; 2917 } 2918 cpos += dp->d_reclen; 2919 dp = (struct dirent *)cpos; 2920 cookiep++; 2921 ncookies--; 2922 } 2923 vrele(vp); 2924 nfsm_clget; 2925 *tl = nfs_false; 2926 bp += NFSX_UNSIGNED; 2927 nfsm_clget; 2928 if (eofflag) 2929 *tl = nfs_true; 2930 else 2931 *tl = nfs_false; 2932 bp += NFSX_UNSIGNED; 2933 if (mp != mb) { 2934 if (bp < be) 2935 mp->m_len = bp - mtod(mp, char *); 2936 } else 2937 mp->m_len += bp - bpos; 2938 free((void *)rbuf, M_TEMP); 2939 free((void *)cookies, M_TEMP); 2940 nfsm_srvdone; 2941 } 2942 2943 int 2944 nfsrv_readdirplus(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 2945 { 2946 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2947 struct mbuf *nam = nfsd->nd_nam; 2948 char *dpos = nfsd->nd_dpos; 2949 kauth_cred_t cred = nfsd->nd_cr; 2950 char *bp, *be; 2951 struct mbuf *mp; 2952 struct dirent *dp; 2953 char *cp; 2954 u_int32_t *tl; 2955 int32_t t1; 2956 char *bpos; 2957 struct mbuf *mb, *mreq __unused, *mp2; 2958 char *cpos, *cend, *cp2, *rbuf; 2959 struct vnode *vp, *nvp; 2960 struct flrep fl; 2961 nfsrvfh_t nsfh; 2962 struct uio io; 2963 struct iovec iv; 2964 struct vattr va, at, *vap = &va; 2965 struct nfs_fattr *fp; 2966 int len, nlen, rem, xfer, tsiz, i, error = 0, getret = 1; 2967 int siz, cnt, fullsiz, eofflag, rdonly, cache = 0, dirlen, ncookies; 2968 u_quad_t frev, off, toff; 2969 #ifdef NFS3_STRICTVERF 2970 u_quad_t verf; 2971 #endif 2972 off_t *cookies = NULL, *cookiep; 2973 2974 nfsm_srvmtofh(&nsfh); 2975 nfsm_dissect(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 2976 toff = fxdr_hyper(tl); 2977 tl += 2; 2978 #ifdef NFS3_STRICTVERF 2979 verf = fxdr_hyper(tl); 2980 #endif 2981 tl += 2; 2982 siz = fxdr_unsigned(int, *tl++); 2983 cnt = fxdr_unsigned(int, *tl); 2984 off = toff; 2985 siz = ((siz + NFS_SRVDIRBLKSIZ - 1) & ~(NFS_SRVDIRBLKSIZ - 1)); 2986 xfer = NFS_SRVMAXDATA(nfsd); 2987 if (siz > xfer) 2988 siz = xfer; 2989 fullsiz = siz; 2990 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 2991 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 2992 if (!error && vp->v_type != VDIR) { 2993 error = ENOTDIR; 2994 vput(vp); 2995 } 2996 if (error) { 2997 nfsm_reply(NFSX_UNSIGNED); 2998 nfsm_srvpostop_attr(getret, &at); 2999 return (0); 3000 } 3001 error = getret = VOP_GETATTR(vp, &at, cred); 3002 #ifdef NFS3_STRICTVERF 3003 /* 3004 * XXX This check is too strict for Solaris 2.5 clients. 3005 */ 3006 if (!error && toff && verf != at.va_filerev) 3007 error = NFSERR_BAD_COOKIE; 3008 #endif 3009 if (!error) { 3010 nqsrv_getl(vp, ND_READ); 3011 error = nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 0); 3012 } 3013 if (error) { 3014 vput(vp); 3015 nfsm_reply(NFSX_V3POSTOPATTR); 3016 nfsm_srvpostop_attr(getret, &at); 3017 return (0); 3018 } 3019 VOP_UNLOCK(vp); 3020 3021 rbuf = malloc(siz, M_TEMP, M_WAITOK); 3022 again: 3023 iv.iov_base = rbuf; 3024 iv.iov_len = fullsiz; 3025 io.uio_iov = &iv; 3026 io.uio_iovcnt = 1; 3027 io.uio_offset = (off_t)off; 3028 io.uio_resid = fullsiz; 3029 io.uio_rw = UIO_READ; 3030 UIO_SETUP_SYSSPACE(&io); 3031 eofflag = 0; 3032 3033 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 3034 3035 error = VOP_READDIR(vp, &io, cred, &eofflag, &cookies, &ncookies); 3036 3037 off = (u_quad_t)io.uio_offset; 3038 getret = VOP_GETATTR(vp, &at, cred); 3039 3040 VOP_UNLOCK(vp); 3041 3042 /* 3043 * If the VGET operation doesn't work for this filesystem, 3044 * we can't support readdirplus. Returning NOTSUPP should 3045 * make clients fall back to plain readdir. 3046 * There's no need to check for VPTOFH as well, we wouldn't 3047 * even be here otherwise. 3048 */ 3049 if (!getret) { 3050 if ((getret = VFS_VGET(vp->v_mount, at.va_fileid, &nvp))) 3051 getret = (getret == EOPNOTSUPP) ? 3052 NFSERR_NOTSUPP : NFSERR_IO; 3053 else 3054 vput(nvp); 3055 } 3056 3057 if (!cookies && !error) 3058 error = NFSERR_PERM; 3059 if (!error) 3060 error = getret; 3061 if (error) { 3062 vrele(vp); 3063 if (cookies) 3064 free((void *)cookies, M_TEMP); 3065 free((void *)rbuf, M_TEMP); 3066 nfsm_reply(NFSX_V3POSTOPATTR); 3067 nfsm_srvpostop_attr(getret, &at); 3068 return (0); 3069 } 3070 if (io.uio_resid) { 3071 siz -= io.uio_resid; 3072 3073 /* 3074 * If nothing read, return eof 3075 * rpc reply 3076 */ 3077 if (siz == 0) { 3078 vrele(vp); 3079 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF + 3080 2 * NFSX_UNSIGNED); 3081 nfsm_srvpostop_attr(getret, &at); 3082 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 3083 txdr_hyper(at.va_filerev, tl); 3084 tl += 2; 3085 *tl++ = nfs_false; 3086 *tl = nfs_true; 3087 free((void *)cookies, M_TEMP); 3088 free((void *)rbuf, M_TEMP); 3089 return (0); 3090 } 3091 } 3092 3093 /* 3094 * Check for degenerate cases of nothing useful read. 3095 * If so go try again 3096 */ 3097 cpos = rbuf; 3098 cend = rbuf + siz; 3099 dp = (struct dirent *)cpos; 3100 cookiep = cookies; 3101 3102 while (cpos < cend && ncookies > 0 && 3103 (dp->d_fileno == 0 || dp->d_type == DT_WHT)) { 3104 cpos += dp->d_reclen; 3105 dp = (struct dirent *)cpos; 3106 cookiep++; 3107 ncookies--; 3108 } 3109 if (cpos >= cend || ncookies == 0) { 3110 toff = off; 3111 siz = fullsiz; 3112 free(cookies, M_TEMP); 3113 cookies = NULL; 3114 goto again; 3115 } 3116 3117 dirlen = len = NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF + 2 * NFSX_UNSIGNED; 3118 nfsm_reply(cnt); 3119 nfsm_srvpostop_attr(getret, &at); 3120 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 3121 txdr_hyper(at.va_filerev, tl); 3122 mp = mp2 = mb; 3123 bp = bpos; 3124 be = bp + M_TRAILINGSPACE(mp); 3125 3126 /* Loop through the records and build reply */ 3127 while (cpos < cend && ncookies > 0) { 3128 if (dp->d_fileno != 0 && dp->d_type != DT_WHT) { 3129 nfsrvfh_t nnsfh; 3130 3131 nlen = dp->d_namlen; 3132 rem = nfsm_rndup(nlen)-nlen; 3133 3134 /* 3135 * For readdir_and_lookup get the vnode using 3136 * the file number. 3137 */ 3138 if (VFS_VGET(vp->v_mount, dp->d_fileno, &nvp)) 3139 goto invalid; 3140 if (nfsrv_composefh(nvp, &nnsfh, true)) { 3141 vput(nvp); 3142 goto invalid; 3143 } 3144 if (VOP_GETATTR(nvp, vap, cred)) { 3145 vput(nvp); 3146 goto invalid; 3147 } 3148 vput(nvp); 3149 3150 /* 3151 * If either the dircount or maxcount will be 3152 * exceeded, get out now. Both of these lengths 3153 * are calculated conservatively, including all 3154 * XDR overheads. 3155 */ 3156 len += (8 * NFSX_UNSIGNED + nlen + rem + NFSX_V3FH + 3157 NFSX_V3POSTOPATTR); 3158 dirlen += (6 * NFSX_UNSIGNED + nlen + rem); 3159 if (len > cnt || dirlen > fullsiz) { 3160 eofflag = 0; 3161 break; 3162 } 3163 3164 /* 3165 * Build the directory record xdr from 3166 * the dirent entry. 3167 */ 3168 fp = (struct nfs_fattr *)&fl.fl_fattr; 3169 nfsm_srvfillattr(vap, fp); 3170 fl.fl_fhsize = txdr_unsigned(NFSX_V3FH); 3171 fl.fl_fhok = nfs_true; 3172 fl.fl_postopok = nfs_true; 3173 txdr_hyper(*cookiep, fl.fl_off.nfsuquad); 3174 3175 nfsm_clget; 3176 *tl = nfs_true; 3177 bp += NFSX_UNSIGNED; 3178 nfsm_clget; 3179 *tl = txdr_unsigned(dp->d_fileno >> 32); 3180 bp += NFSX_UNSIGNED; 3181 nfsm_clget; 3182 *tl = txdr_unsigned(dp->d_fileno); 3183 bp += NFSX_UNSIGNED; 3184 nfsm_clget; 3185 *tl = txdr_unsigned(nlen); 3186 bp += NFSX_UNSIGNED; 3187 3188 /* And loop around copying the name */ 3189 xfer = nlen; 3190 cp = dp->d_name; 3191 while (xfer > 0) { 3192 nfsm_clget; 3193 if ((bp + xfer) > be) 3194 tsiz = be - bp; 3195 else 3196 tsiz = xfer; 3197 memcpy(bp, cp, tsiz); 3198 bp += tsiz; 3199 xfer -= tsiz; 3200 if (xfer > 0) 3201 cp += tsiz; 3202 } 3203 /* And null pad to an int32_t boundary */ 3204 for (i = 0; i < rem; i++) 3205 *bp++ = '\0'; 3206 3207 /* 3208 * Now copy the flrep structure out. 3209 */ 3210 xfer = sizeof(struct flrep); 3211 cp = (void *)&fl; 3212 while (xfer > 0) { 3213 nfsm_clget; 3214 if ((bp + xfer) > be) 3215 tsiz = be - bp; 3216 else 3217 tsiz = xfer; 3218 memcpy(bp, cp, tsiz); 3219 bp += tsiz; 3220 xfer -= tsiz; 3221 if (xfer > 0) 3222 cp += tsiz; 3223 } 3224 3225 /* 3226 * ... and filehandle. 3227 */ 3228 xfer = NFSRVFH_SIZE(&nnsfh); 3229 cp = NFSRVFH_DATA(&nnsfh); 3230 while (xfer > 0) { 3231 nfsm_clget; 3232 if ((bp + xfer) > be) 3233 tsiz = be - bp; 3234 else 3235 tsiz = xfer; 3236 memcpy(bp, cp, tsiz); 3237 bp += tsiz; 3238 xfer -= tsiz; 3239 if (xfer > 0) 3240 cp += tsiz; 3241 } 3242 } 3243 invalid: 3244 cpos += dp->d_reclen; 3245 dp = (struct dirent *)cpos; 3246 cookiep++; 3247 ncookies--; 3248 } 3249 vrele(vp); 3250 nfsm_clget; 3251 *tl = nfs_false; 3252 bp += NFSX_UNSIGNED; 3253 nfsm_clget; 3254 if (eofflag) 3255 *tl = nfs_true; 3256 else 3257 *tl = nfs_false; 3258 bp += NFSX_UNSIGNED; 3259 if (mp != mb) { 3260 if (bp < be) 3261 mp->m_len = bp - mtod(mp, char *); 3262 } else 3263 mp->m_len += bp - bpos; 3264 free((void *)cookies, M_TEMP); 3265 free((void *)rbuf, M_TEMP); 3266 nfsm_srvdone; 3267 } 3268 3269 /* 3270 * nfs commit service 3271 */ 3272 int 3273 nfsrv_commit(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 3274 { 3275 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3276 struct mbuf *nam = nfsd->nd_nam; 3277 char *dpos = nfsd->nd_dpos; 3278 kauth_cred_t cred = nfsd->nd_cr; 3279 struct vattr bfor, aft; 3280 struct vnode *vp; 3281 nfsrvfh_t nsfh; 3282 u_int32_t *tl; 3283 int32_t t1; 3284 char *bpos; 3285 int error = 0, rdonly, for_ret = 1, aft_ret = 1, cache = 0; 3286 uint32_t cnt; 3287 char *cp2; 3288 struct mbuf *mb, *mreq __unused; 3289 u_quad_t frev, off, end; 3290 3291 nfsm_srvmtofh(&nsfh); 3292 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 3293 3294 off = fxdr_hyper(tl); 3295 tl += 2; 3296 cnt = fxdr_unsigned(uint32_t, *tl); 3297 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 3298 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 3299 if (error) { 3300 nfsm_reply(2 * NFSX_UNSIGNED); 3301 nfsm_srvwcc_data(for_ret, &bfor, aft_ret, &aft); 3302 return (0); 3303 } 3304 for_ret = VOP_GETATTR(vp, &bfor, cred); 3305 end = (cnt > 0) ? off + cnt : vp->v_size; 3306 if (end < off || end > vp->v_size) 3307 end = vp->v_size; 3308 if (off < vp->v_size) 3309 error = VOP_FSYNC(vp, cred, FSYNC_WAIT, off, end); 3310 /* else error == 0, from nfsrv_fhtovp() */ 3311 aft_ret = VOP_GETATTR(vp, &aft, cred); 3312 vput(vp); 3313 nfsm_reply(NFSX_V3WCCDATA + NFSX_V3WRITEVERF); 3314 nfsm_srvwcc_data(for_ret, &bfor, aft_ret, &aft); 3315 if (!error) { 3316 nfsm_build(tl, u_int32_t *, NFSX_V3WRITEVERF); 3317 *tl++ = txdr_unsigned(boottime.tv_sec); 3318 *tl = txdr_unsigned(boottime.tv_nsec / 1000); 3319 } else { 3320 return (0); 3321 } 3322 nfsm_srvdone; 3323 } 3324 3325 /* 3326 * nfs statfs service 3327 */ 3328 int 3329 nfsrv_statfs(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 3330 { 3331 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3332 struct mbuf *nam = nfsd->nd_nam; 3333 char *dpos = nfsd->nd_dpos; 3334 kauth_cred_t cred = nfsd->nd_cr; 3335 struct statvfs *sf = NULL; 3336 struct nfs_statfs *sfp; 3337 u_int32_t *tl; 3338 int32_t t1; 3339 char *bpos; 3340 int error = 0, rdonly, cache = 0, getret = 1; 3341 int v3 = (nfsd->nd_flag & ND_NFSV3); 3342 char *cp2; 3343 struct mbuf *mb, *mreq __unused; 3344 struct vnode *vp; 3345 struct vattr at; 3346 nfsrvfh_t nsfh; 3347 u_quad_t frev, tval; 3348 3349 nfsm_srvmtofh(&nsfh); 3350 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 3351 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 3352 if (error) { 3353 nfsm_reply(NFSX_UNSIGNED); 3354 nfsm_srvpostop_attr(getret, &at); 3355 return (0); 3356 } 3357 sf = malloc(sizeof(*sf), M_TEMP, M_WAITOK); 3358 error = VFS_STATVFS(vp->v_mount, sf); 3359 getret = VOP_GETATTR(vp, &at, cred); 3360 vput(vp); 3361 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_STATFS(v3)); 3362 if (v3) 3363 nfsm_srvpostop_attr(getret, &at); 3364 if (error) { 3365 free(sf, M_TEMP); 3366 return (0); 3367 } 3368 nfsm_build(sfp, struct nfs_statfs *, NFSX_STATFS(v3)); 3369 if (v3) { 3370 tval = (u_quad_t)((quad_t)sf->f_blocks * (quad_t)sf->f_frsize); 3371 txdr_hyper(tval, &sfp->sf_tbytes); 3372 tval = (u_quad_t)((quad_t)sf->f_bfree * (quad_t)sf->f_frsize); 3373 txdr_hyper(tval, &sfp->sf_fbytes); 3374 tval = (u_quad_t)((quad_t)sf->f_bavail * (quad_t)sf->f_frsize); 3375 txdr_hyper(tval, &sfp->sf_abytes); 3376 tval = (u_quad_t)sf->f_files; 3377 txdr_hyper(tval, &sfp->sf_tfiles); 3378 tval = (u_quad_t)sf->f_ffree; 3379 txdr_hyper(tval, &sfp->sf_ffiles); 3380 txdr_hyper(tval, &sfp->sf_afiles); 3381 sfp->sf_invarsec = 0; 3382 } else { 3383 sfp->sf_tsize = txdr_unsigned(NFS_MAXDGRAMDATA); 3384 sfp->sf_bsize = txdr_unsigned(sf->f_frsize); 3385 sfp->sf_blocks = txdr_unsigned(sf->f_blocks); 3386 sfp->sf_bfree = txdr_unsigned(sf->f_bfree); 3387 sfp->sf_bavail = txdr_unsigned(sf->f_bavail); 3388 } 3389 nfsmout: 3390 if (sf) 3391 free(sf, M_TEMP); 3392 return error; 3393 } 3394 3395 /* 3396 * nfs fsinfo service 3397 */ 3398 int 3399 nfsrv_fsinfo(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 3400 { 3401 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3402 struct mbuf *nam = nfsd->nd_nam; 3403 char *dpos = nfsd->nd_dpos; 3404 kauth_cred_t cred = nfsd->nd_cr; 3405 u_int32_t *tl; 3406 struct nfsv3_fsinfo *sip; 3407 int32_t t1; 3408 char *bpos; 3409 int error = 0, rdonly, cache = 0, getret = 1; 3410 uint32_t maxdata; 3411 char *cp2; 3412 struct mbuf *mb, *mreq __unused; 3413 struct vnode *vp; 3414 struct vattr at; 3415 nfsrvfh_t nsfh; 3416 u_quad_t frev, maxfsize; 3417 struct statvfs *sb; 3418 3419 nfsm_srvmtofh(&nsfh); 3420 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 3421 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 3422 if (error) { 3423 nfsm_reply(NFSX_UNSIGNED); 3424 nfsm_srvpostop_attr(getret, &at); 3425 return (0); 3426 } 3427 3428 /* XXX Try to make a guess on the max file size. */ 3429 sb = malloc(sizeof(*sb), M_TEMP, M_WAITOK); 3430 VFS_STATVFS(vp->v_mount, sb); 3431 maxfsize = (u_quad_t)0x80000000 * sb->f_frsize - 1; 3432 free(sb, M_TEMP); 3433 3434 getret = VOP_GETATTR(vp, &at, cred); 3435 vput(vp); 3436 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3FSINFO); 3437 nfsm_srvpostop_attr(getret, &at); 3438 nfsm_build(sip, struct nfsv3_fsinfo *, NFSX_V3FSINFO); 3439 3440 /* 3441 * XXX 3442 * There should be file system VFS OP(s) to get this information. 3443 * For now, assume ufs. 3444 */ 3445 if (slp->ns_so->so_type == SOCK_DGRAM) 3446 maxdata = NFS_MAXDGRAMDATA; 3447 else 3448 maxdata = NFS_MAXDATA; 3449 sip->fs_rtmax = txdr_unsigned(maxdata); 3450 sip->fs_rtpref = txdr_unsigned(maxdata); 3451 sip->fs_rtmult = txdr_unsigned(NFS_FABLKSIZE); 3452 sip->fs_wtmax = txdr_unsigned(maxdata); 3453 sip->fs_wtpref = txdr_unsigned(maxdata); 3454 sip->fs_wtmult = txdr_unsigned(NFS_FABLKSIZE); 3455 sip->fs_dtpref = txdr_unsigned(maxdata); 3456 txdr_hyper(maxfsize, &sip->fs_maxfilesize); 3457 sip->fs_timedelta.nfsv3_sec = 0; 3458 sip->fs_timedelta.nfsv3_nsec = txdr_unsigned(1); 3459 sip->fs_properties = txdr_unsigned(NFSV3FSINFO_LINK | 3460 NFSV3FSINFO_SYMLINK | NFSV3FSINFO_HOMOGENEOUS | 3461 NFSV3FSINFO_CANSETTIME); 3462 nfsm_srvdone; 3463 } 3464 3465 /* 3466 * nfs pathconf service 3467 */ 3468 int 3469 nfsrv_pathconf(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 3470 { 3471 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3472 struct mbuf *nam = nfsd->nd_nam; 3473 char *dpos = nfsd->nd_dpos; 3474 kauth_cred_t cred = nfsd->nd_cr; 3475 u_int32_t *tl; 3476 struct nfsv3_pathconf *pc; 3477 int32_t t1; 3478 char *bpos; 3479 int error = 0, rdonly, cache = 0, getret = 1; 3480 register_t linkmax, namemax, chownres, notrunc; 3481 char *cp2; 3482 struct mbuf *mb, *mreq __unused; 3483 struct vnode *vp; 3484 struct vattr at; 3485 nfsrvfh_t nsfh; 3486 u_quad_t frev; 3487 3488 nfsm_srvmtofh(&nsfh); 3489 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 3490 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 3491 if (error) { 3492 nfsm_reply(NFSX_UNSIGNED); 3493 nfsm_srvpostop_attr(getret, &at); 3494 return (0); 3495 } 3496 error = VOP_PATHCONF(vp, _PC_LINK_MAX, &linkmax); 3497 if (!error) 3498 error = VOP_PATHCONF(vp, _PC_NAME_MAX, &namemax); 3499 if (!error) 3500 error = VOP_PATHCONF(vp, _PC_CHOWN_RESTRICTED, &chownres); 3501 if (!error) 3502 error = VOP_PATHCONF(vp, _PC_NO_TRUNC, ¬runc); 3503 getret = VOP_GETATTR(vp, &at, cred); 3504 vput(vp); 3505 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3PATHCONF); 3506 nfsm_srvpostop_attr(getret, &at); 3507 if (error) 3508 return (0); 3509 nfsm_build(pc, struct nfsv3_pathconf *, NFSX_V3PATHCONF); 3510 3511 pc->pc_linkmax = txdr_unsigned(linkmax); 3512 pc->pc_namemax = txdr_unsigned(namemax); 3513 pc->pc_notrunc = txdr_unsigned(notrunc); 3514 pc->pc_chownrestricted = txdr_unsigned(chownres); 3515 3516 /* 3517 * These should probably be supported by VOP_PATHCONF(), but 3518 * until msdosfs is exportable (why would you want to?), the 3519 * Unix defaults should be ok. 3520 */ 3521 pc->pc_caseinsensitive = nfs_false; 3522 pc->pc_casepreserving = nfs_true; 3523 nfsm_srvdone; 3524 } 3525 3526 /* 3527 * Null operation, used by clients to ping server 3528 */ 3529 /* ARGSUSED */ 3530 int 3531 nfsrv_null(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, 3532 struct lwp *lwp, struct mbuf **mrq) 3533 { 3534 struct mbuf *mrep = nfsd->nd_mrep; 3535 char *bpos; 3536 int error = NFSERR_RETVOID, cache = 0; 3537 struct mbuf *mb, *mreq __unused; 3538 u_quad_t frev; 3539 3540 nfsm_reply(0); 3541 nfsmout: 3542 return (0); 3543 } 3544 3545 /* 3546 * No operation, used for obsolete procedures 3547 */ 3548 /* ARGSUSED */ 3549 int 3550 nfsrv_noop(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, 3551 struct lwp *lwp, struct mbuf **mrq) 3552 { 3553 struct mbuf *mrep = nfsd->nd_mrep; 3554 char *bpos; 3555 int error, cache = 0; 3556 struct mbuf *mb, *mreq __unused; 3557 u_quad_t frev; 3558 3559 if (nfsd->nd_repstat) 3560 error = nfsd->nd_repstat; 3561 else 3562 error = EPROCUNAVAIL; 3563 nfsm_reply(0); 3564 nfsmout: 3565 return (0); 3566 } 3567 3568 /* 3569 * Perform access checking for vnodes obtained from file handles that would 3570 * refer to files already opened by a Unix client. You cannot just use 3571 * vn_writechk() and VOP_ACCESS() for two reasons. 3572 * 1 - You must check for exported rdonly as well as MNT_RDONLY for the write case 3573 * 2 - The owner is to be given access irrespective of mode bits for some 3574 * operations, so that processes that chmod after opening a file don't 3575 * break. I don't like this because it opens a security hole, but since 3576 * the nfs server opens a security hole the size of a barn door anyhow, 3577 * what the heck. 3578 * 3579 * The exception to rule 2 is EPERM. If a file is IMMUTABLE, VOP_ACCESS() 3580 * will return EPERM instead of EACCES. EPERM is always an error. 3581 */ 3582 int 3583 nfsrv_access(struct vnode *vp, int flags, kauth_cred_t cred, int rdonly, struct lwp *lwp, int override) 3584 { 3585 struct vattr vattr; 3586 int error; 3587 if (flags & VWRITE) { 3588 /* Just vn_writechk() changed to check rdonly */ 3589 /* 3590 * Disallow write attempts on read-only file systems; 3591 * unless the file is a socket or a block or character 3592 * device resident on the file system. 3593 */ 3594 if (rdonly || (vp->v_mount->mnt_flag & MNT_RDONLY)) { 3595 switch (vp->v_type) { 3596 case VREG: 3597 case VDIR: 3598 case VLNK: 3599 return (EROFS); 3600 default: 3601 break; 3602 } 3603 } 3604 3605 /* 3606 * If the vnode is in use as a process's text, 3607 * we can't allow writing. 3608 */ 3609 if (vp->v_iflag & VI_TEXT) 3610 return (ETXTBSY); 3611 } 3612 error = VOP_GETATTR(vp, &vattr, cred); 3613 if (error) 3614 return (error); 3615 error = VOP_ACCESS(vp, flags, cred); 3616 /* 3617 * Allow certain operations for the owner (reads and writes 3618 * on files that are already open). 3619 */ 3620 if (override && error == EACCES && kauth_cred_geteuid(cred) == vattr.va_uid) 3621 error = 0; 3622 return error; 3623 } 3624
Indexes created Mon Sep 22 13:09:51 GMT 2025