nfs_serv.c revision 1.171
1 /* $NetBSD: nfs_serv.c,v 1.171 2015/04/20 23:03:09 riastradh 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 1.171 2015/04/20 23:03:09 riastradh Exp $"); 59 60 #include <sys/param.h> 61 #include <sys/systm.h> 62 #include <sys/proc.h> 63 #include <sys/file.h> 64 #include <sys/namei.h> 65 #include <sys/vnode.h> 66 #include <sys/mount.h> 67 #include <sys/socket.h> 68 #include <sys/socketvar.h> 69 #include <sys/mbuf.h> 70 #include <sys/dirent.h> 71 #include <sys/stat.h> 72 #include <sys/kernel.h> 73 #include <sys/hash.h> 74 #include <sys/kauth.h> 75 #include <sys/module.h> 76 #include <sys/syscall.h> 77 #include <sys/syscallargs.h> 78 #include <sys/syscallvar.h> 79 80 #include <uvm/uvm.h> 81 82 #include <nfs/nfsproto.h> 83 #include <nfs/rpcv2.h> 84 #include <nfs/nfs.h> 85 #include <nfs/xdr_subs.h> 86 #include <nfs/nfsm_subs.h> 87 #include <nfs/nfs_var.h> 88 89 MODULE(MODULE_CLASS_MISC, nfsserver, "nfs"); 90 91 /* Global vars */ 92 extern u_int32_t nfs_xdrneg1; 93 extern u_int32_t nfs_false, nfs_true; 94 extern const enum vtype nv3tov_type[8]; 95 extern struct nfsstats nfsstats; 96 extern const nfstype nfsv2_type[9]; 97 extern const nfstype nfsv3_type[9]; 98 int nfsrvw_procrastinate = NFS_GATHERDELAY * 1000; 99 bool nfsd_use_loan = true; /* use page-loan for READ OP */ 100 101 #define nqsrv_getl(vp, rw) /* nothing */ 102 103 static const struct syscall_package nfsserver_syscalls[] = { 104 { SYS_nfssvc, 0, (sy_call_t *)sys_nfssvc }, 105 { 0, 0, NULL }, 106 }; 107 108 static int 109 nfsserver_modcmd(modcmd_t cmd, void *arg) 110 { 111 extern struct vfs_hooks nfs_export_hooks; /* XXX */ 112 int error; 113 114 switch (cmd) { 115 case MODULE_CMD_INIT: 116 error = syscall_establish(NULL, nfsserver_syscalls); 117 if (error != 0) { 118 return error; 119 } 120 nfs_init(); /* XXX for monolithic kernel */ 121 netexport_init(); 122 nfsrv_initcache(); /* Init the server request cache */ 123 nfsrv_init(0); /* Init server data structures */ 124 vfs_hooks_attach(&nfs_export_hooks); 125 nfs_timer_srvinit(nfsrv_timer); 126 return 0; 127 case MODULE_CMD_FINI: 128 error = syscall_disestablish(NULL, nfsserver_syscalls); 129 if (error != 0) { 130 return error; 131 } 132 /* 133 * Kill export list before detaching VFS hooks, so we 134 * we don't leak state due to a concurrent umount(). 135 */ 136 netexport_fini(); 137 vfs_hooks_detach(&nfs_export_hooks); 138 139 /* Kill timer before server goes away. */ 140 nfs_timer_srvfini(); 141 nfsrv_fini(); 142 143 /* Server uses server cache, so kill cache last. */ 144 nfsrv_finicache(); 145 nfs_fini(); 146 return 0; 147 case MODULE_CMD_AUTOUNLOAD: 148 if (netexport_hasexports()) 149 return EBUSY; 150 /*FALLTHROUGH*/ 151 default: 152 return ENOTTY; 153 } 154 } 155 156 /* 157 * nfs v3 access service 158 */ 159 int 160 nfsrv3_access(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 161 { 162 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 163 struct mbuf *nam = nfsd->nd_nam; 164 char *dpos = nfsd->nd_dpos; 165 kauth_cred_t cred = nfsd->nd_cr; 166 struct vnode *vp; 167 nfsrvfh_t nsfh; 168 u_int32_t *tl; 169 int32_t t1; 170 char *bpos; 171 int error = 0, rdonly, cache = 0, getret; 172 char *cp2; 173 struct mbuf *mb, *mreq __unused; 174 struct vattr va; 175 u_long inmode, testmode, outmode; 176 u_quad_t frev; 177 178 nfsm_srvmtofh(&nsfh); 179 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 180 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, &rdonly, 181 (nfsd->nd_flag & ND_KERBAUTH), false); 182 if (error) { 183 nfsm_reply(NFSX_UNSIGNED); 184 nfsm_srvpostop_attr(1, (struct vattr *)0); 185 return (0); 186 } 187 inmode = fxdr_unsigned(u_int32_t, *tl); 188 outmode = 0; 189 if ((inmode & NFSV3ACCESS_READ) && 190 nfsrv_access(vp, VREAD, cred, rdonly, lwp, 0) == 0) 191 outmode |= NFSV3ACCESS_READ; 192 if (vp->v_type != VDIR) { 193 testmode = inmode & (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND); 194 if (testmode && 195 nfsrv_access(vp, VWRITE, cred, rdonly, lwp, 0) == 0) 196 outmode |= testmode; 197 if ((inmode & NFSV3ACCESS_EXECUTE) && 198 nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 0) == 0) 199 outmode |= NFSV3ACCESS_EXECUTE; 200 } else { 201 testmode = inmode & (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | 202 NFSV3ACCESS_DELETE); 203 if (testmode && 204 nfsrv_access(vp, VWRITE, cred, rdonly, lwp, 0) == 0) 205 outmode |= testmode; 206 if ((inmode & NFSV3ACCESS_LOOKUP) && 207 nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 0) == 0) 208 outmode |= NFSV3ACCESS_LOOKUP; 209 } 210 getret = VOP_GETATTR(vp, &va, cred); 211 vput(vp); 212 nfsm_reply(NFSX_POSTOPATTR(1) + NFSX_UNSIGNED); 213 nfsm_srvpostop_attr(getret, &va); 214 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 215 *tl = txdr_unsigned(outmode); 216 nfsm_srvdone; 217 } 218 219 /* 220 * nfs getattr service 221 */ 222 int 223 nfsrv_getattr(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 224 { 225 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 226 struct mbuf *nam = nfsd->nd_nam; 227 char *dpos = nfsd->nd_dpos; 228 kauth_cred_t cred = nfsd->nd_cr; 229 struct nfs_fattr *fp; 230 struct vattr va; 231 struct vnode *vp; 232 nfsrvfh_t nsfh; 233 u_int32_t *tl; 234 int32_t t1; 235 char *bpos; 236 int error = 0, rdonly, cache = 0; 237 char *cp2; 238 struct mbuf *mb, *mreq __unused; 239 u_quad_t frev; 240 241 nfsm_srvmtofh(&nsfh); 242 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, &rdonly, 243 (nfsd->nd_flag & ND_KERBAUTH), false); 244 if (error) { 245 nfsm_reply(0); 246 return (0); 247 } 248 nqsrv_getl(vp, ND_READ); 249 error = VOP_GETATTR(vp, &va, cred); 250 vput(vp); 251 nfsm_reply(NFSX_FATTR(nfsd->nd_flag & ND_NFSV3)); 252 if (error) 253 return (0); 254 nfsm_build(fp, struct nfs_fattr *, NFSX_FATTR(nfsd->nd_flag & ND_NFSV3)); 255 nfsm_srvfillattr(&va, fp); 256 nfsm_srvdone; 257 } 258 259 /* 260 * nfs setattr service 261 */ 262 int 263 nfsrv_setattr(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 264 { 265 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 266 struct mbuf *nam = nfsd->nd_nam; 267 char *dpos = nfsd->nd_dpos; 268 kauth_cred_t cred = nfsd->nd_cr; 269 struct vattr va, preat; 270 struct nfsv2_sattr *sp; 271 struct nfs_fattr *fp; 272 struct vnode *vp; 273 nfsrvfh_t nsfh; 274 u_int32_t *tl; 275 int32_t t1; 276 char *bpos; 277 int error = 0, rdonly, cache = 0, preat_ret = 1, postat_ret = 1; 278 int v3 = (nfsd->nd_flag & ND_NFSV3), gcheck = 0; 279 char *cp2; 280 struct mbuf *mb, *mreq __unused; 281 u_quad_t frev; 282 struct timespec guard; 283 284 memset(&guard, 0, sizeof guard); /* XXX gcc */ 285 286 nfsm_srvmtofh(&nsfh); 287 vattr_null(&va); 288 if (v3) { 289 nfsm_srvsattr(&va); 290 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 291 gcheck = fxdr_unsigned(int, *tl); 292 if (gcheck) { 293 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 294 fxdr_nfsv3time(tl, &guard); 295 } 296 } else { 297 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 298 /* 299 * Nah nah nah nah na nah 300 * There is a bug in the Sun client that puts 0xffff in the mode 301 * field of sattr when it should put in 0xffffffff. The u_short 302 * doesn't sign extend. 303 * --> check the low order 2 bytes for 0xffff 304 */ 305 if ((fxdr_unsigned(int, sp->sa_mode) & 0xffff) != 0xffff) 306 va.va_mode = nfstov_mode(sp->sa_mode); 307 if (sp->sa_uid != nfs_xdrneg1) 308 va.va_uid = fxdr_unsigned(uid_t, sp->sa_uid); 309 if (sp->sa_gid != nfs_xdrneg1) 310 va.va_gid = fxdr_unsigned(gid_t, sp->sa_gid); 311 if (sp->sa_size != nfs_xdrneg1) 312 va.va_size = fxdr_unsigned(u_quad_t, sp->sa_size); 313 if (sp->sa_atime.nfsv2_sec != nfs_xdrneg1) { 314 #ifdef notyet 315 fxdr_nfsv2time(&sp->sa_atime, &va.va_atime); 316 #else 317 va.va_atime.tv_sec = 318 fxdr_unsigned(u_int32_t,sp->sa_atime.nfsv2_sec); 319 va.va_atime.tv_nsec = 0; 320 #endif 321 } 322 if (sp->sa_mtime.nfsv2_sec != nfs_xdrneg1) 323 fxdr_nfsv2time(&sp->sa_mtime, &va.va_mtime); 324 325 } 326 327 /* 328 * Now that we have all the fields, lets do it. 329 */ 330 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, &rdonly, 331 (nfsd->nd_flag & ND_KERBAUTH), false); 332 if (error) { 333 nfsm_reply(2 * NFSX_UNSIGNED); 334 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 335 return (0); 336 } 337 nqsrv_getl(vp, ND_WRITE); 338 if (v3) { 339 error = preat_ret = VOP_GETATTR(vp, &preat, cred); 340 if (!error && gcheck && 341 (preat.va_ctime.tv_sec != guard.tv_sec || 342 preat.va_ctime.tv_nsec != guard.tv_nsec)) 343 error = NFSERR_NOT_SYNC; 344 if (error) { 345 vput(vp); 346 nfsm_reply(NFSX_WCCDATA(v3)); 347 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 348 return (0); 349 } 350 } 351 352 /* 353 * If the size is being changed write acces is required, otherwise 354 * just check for a read only file system. 355 */ 356 if (va.va_size == ((u_quad_t)((quad_t) -1))) { 357 if (rdonly || (vp->v_mount->mnt_flag & MNT_RDONLY)) { 358 error = EROFS; 359 goto out; 360 } 361 } else { 362 if (vp->v_type == VDIR) { 363 error = EISDIR; 364 goto out; 365 } else if ((error = nfsrv_access(vp, VWRITE, cred, rdonly, 366 lwp, 0)) != 0) 367 goto out; 368 } 369 error = VOP_SETATTR(vp, &va, cred); 370 postat_ret = VOP_GETATTR(vp, &va, cred); 371 if (!error) 372 error = postat_ret; 373 out: 374 vput(vp); 375 nfsm_reply(NFSX_WCCORFATTR(v3)); 376 if (v3) { 377 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 378 return (0); 379 } else { 380 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 381 nfsm_srvfillattr(&va, fp); 382 } 383 nfsm_srvdone; 384 } 385 386 /* 387 * nfs lookup rpc 388 */ 389 int 390 nfsrv_lookup(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 391 { 392 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 393 struct mbuf *nam = nfsd->nd_nam; 394 char *dpos = nfsd->nd_dpos; 395 kauth_cred_t cred = nfsd->nd_cr; 396 struct nfs_fattr *fp; 397 struct nameidata nd, ind, *ndp = &nd; 398 struct pathbuf *ipb = NULL; 399 struct vnode *vp, *dirp; 400 nfsrvfh_t nsfh; 401 char *cp; 402 u_int32_t *tl; 403 int32_t t1; 404 char *bpos; 405 int error = 0, cache = 0, dirattr_ret = 1; 406 uint32_t len; 407 int v3 = (nfsd->nd_flag & ND_NFSV3), pubflag; 408 char *cp2; 409 struct mbuf *mb, *mreq __unused; 410 struct vattr va, dirattr; 411 u_quad_t frev; 412 413 nfsm_srvmtofh(&nsfh); 414 nfsm_srvnamesiz(len); 415 416 pubflag = nfs_ispublicfh(&nsfh); 417 418 nd.ni_cnd.cn_cred = cred; 419 nd.ni_cnd.cn_nameiop = LOOKUP; 420 nd.ni_cnd.cn_flags = LOCKLEAF; 421 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 422 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), pubflag); 423 424 if (!error && pubflag) { 425 if (nd.ni_vp->v_type == VDIR && nfs_pub.np_index != NULL && 426 (ipb = pathbuf_create(nfs_pub.np_index)) != NULL) { 427 /* 428 * Setup call to lookup() to see if we can find 429 * the index file. Arguably, this doesn't belong 430 * in a kernel.. Ugh. 431 */ 432 ind = nd; 433 VOP_UNLOCK(nd.ni_vp); 434 ind.ni_pathbuf = ipb; 435 436 error = lookup_for_nfsd_index(&ind, nd.ni_vp); 437 if (!error) { 438 /* 439 * Found an index file. Get rid of 440 * the old references. 441 */ 442 if (dirp) 443 vrele(dirp); 444 dirp = nd.ni_vp; 445 ndp = &ind; 446 } else 447 error = 0; 448 } 449 /* 450 * If the public filehandle was used, check that this lookup 451 * didn't result in a filehandle outside the publicly exported 452 * filesystem. 453 */ 454 455 if (!error && ndp->ni_vp->v_mount != nfs_pub.np_mount) { 456 vput(nd.ni_vp); 457 error = EPERM; 458 } 459 } 460 461 if (error) { 462 if (nd.ni_pathbuf != NULL) { 463 pathbuf_destroy(nd.ni_pathbuf); 464 } 465 if (ipb != NULL) { 466 pathbuf_destroy(ipb); 467 } 468 if (dirp) { 469 if (v3) { 470 vn_lock(dirp, LK_SHARED | LK_RETRY); 471 dirattr_ret = VOP_GETATTR(dirp, &dirattr, cred); 472 vput(dirp); 473 } else 474 vrele(dirp); 475 } 476 nfsm_reply(NFSX_POSTOPATTR(v3)); 477 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 478 return (0); 479 } 480 481 nqsrv_getl(ndp->ni_startdir, ND_READ); 482 pathbuf_destroy(nd.ni_pathbuf); 483 if (ipb != NULL) { 484 pathbuf_destroy(ipb); 485 } 486 vp = ndp->ni_vp; 487 error = nfsrv_composefh(vp, &nsfh, v3); 488 if (!error) 489 error = VOP_GETATTR(vp, &va, cred); 490 vput(vp); 491 if (dirp) { 492 if (v3) { 493 vn_lock(dirp, LK_SHARED | LK_RETRY); 494 dirattr_ret = VOP_GETATTR(dirp, &dirattr, cred); 495 vput(dirp); 496 } else 497 vrele(dirp); 498 } 499 nfsm_reply(NFSX_SRVFH(&nsfh, v3) + NFSX_POSTOPORFATTR(v3) + 500 NFSX_POSTOPATTR(v3)); 501 if (error) { 502 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 503 return (0); 504 } 505 nfsm_srvfhtom(&nsfh, v3); 506 if (v3) { 507 nfsm_srvpostop_attr(0, &va); 508 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 509 } else { 510 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 511 nfsm_srvfillattr(&va, fp); 512 } 513 nfsm_srvdone; 514 } 515 516 /* 517 * nfs readlink service 518 */ 519 int 520 nfsrv_readlink(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 521 { 522 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 523 struct mbuf *nam = nfsd->nd_nam; 524 char *dpos = nfsd->nd_dpos; 525 kauth_cred_t cred = nfsd->nd_cr; 526 struct iovec iv[(NFS_MAXPATHLEN+MLEN-1)/MLEN]; 527 struct iovec *ivp = iv; 528 struct mbuf *mp; 529 u_int32_t *tl; 530 int32_t t1; 531 char *bpos; 532 int error = 0, rdonly, cache = 0, i, padlen, getret; 533 uint32_t len; 534 int v3 = (nfsd->nd_flag & ND_NFSV3); 535 char *cp2; 536 struct mbuf *mb, *mp2 = NULL, *mp3 = NULL, *mreq __unused; 537 struct vnode *vp; 538 struct vattr attr; 539 nfsrvfh_t nsfh; 540 struct uio io, *uiop = &io; 541 u_quad_t frev; 542 543 nfsm_srvmtofh(&nsfh); 544 len = 0; 545 i = 0; 546 while (len < NFS_MAXPATHLEN) { 547 mp = m_get(M_WAIT, MT_DATA); 548 MCLAIM(mp, &nfs_mowner); 549 m_clget(mp, M_WAIT); 550 mp->m_len = NFSMSIZ(mp); 551 if (len == 0) 552 mp3 = mp2 = mp; 553 else { 554 mp2->m_next = mp; 555 mp2 = mp; 556 } 557 if ((len+mp->m_len) > NFS_MAXPATHLEN) { 558 mp->m_len = NFS_MAXPATHLEN-len; 559 len = NFS_MAXPATHLEN; 560 } else 561 len += mp->m_len; 562 ivp->iov_base = mtod(mp, void *); 563 ivp->iov_len = mp->m_len; 564 i++; 565 ivp++; 566 } 567 uiop->uio_iov = iv; 568 uiop->uio_iovcnt = i; 569 uiop->uio_offset = 0; 570 uiop->uio_resid = len; 571 uiop->uio_rw = UIO_READ; 572 UIO_SETUP_SYSSPACE(uiop); 573 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 574 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 575 if (error) { 576 m_freem(mp3); 577 nfsm_reply(2 * NFSX_UNSIGNED); 578 nfsm_srvpostop_attr(1, (struct vattr *)0); 579 return (0); 580 } 581 if (vp->v_type != VLNK) { 582 if (v3) 583 error = EINVAL; 584 else 585 error = ENXIO; 586 goto out; 587 } 588 nqsrv_getl(vp, ND_READ); 589 error = VOP_READLINK(vp, uiop, cred); 590 out: 591 getret = VOP_GETATTR(vp, &attr, cred); 592 vput(vp); 593 if (error) 594 m_freem(mp3); 595 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_UNSIGNED); 596 if (v3) { 597 nfsm_srvpostop_attr(getret, &attr); 598 if (error) 599 return (0); 600 } 601 len -= uiop->uio_resid; 602 padlen = nfsm_padlen(len); 603 if (uiop->uio_resid || padlen) 604 nfs_zeropad(mp3, uiop->uio_resid, padlen); 605 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 606 *tl = txdr_unsigned(len); 607 mb->m_next = mp3; 608 nfsm_srvdone; 609 } 610 611 /* 612 * nfs read service 613 */ 614 int 615 nfsrv_read(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 616 { 617 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 618 struct mbuf *nam = nfsd->nd_nam; 619 char *dpos = nfsd->nd_dpos; 620 kauth_cred_t cred = nfsd->nd_cr; 621 struct mbuf *m; 622 struct nfs_fattr *fp; 623 u_int32_t *tl; 624 int32_t t1; 625 int i; 626 char *bpos; 627 int error = 0, rdonly, cache = 0, getret; 628 int v3 = (nfsd->nd_flag & ND_NFSV3); 629 uint32_t reqlen, len, cnt, left; 630 int padlen; 631 char *cp2; 632 struct mbuf *mb, *mreq; 633 struct vnode *vp; 634 nfsrvfh_t nsfh; 635 struct uio io, *uiop = &io; 636 struct vattr va; 637 off_t off; 638 u_quad_t frev; 639 640 nfsm_srvmtofh(&nsfh); 641 if (v3) { 642 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 643 off = fxdr_hyper(tl); 644 } else { 645 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 646 off = (off_t)fxdr_unsigned(u_int32_t, *tl); 647 } 648 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 649 reqlen = fxdr_unsigned(uint32_t, *tl); 650 reqlen = MIN(reqlen, NFS_SRVMAXDATA(nfsd)); 651 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 652 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 653 if (error) { 654 nfsm_reply(2 * NFSX_UNSIGNED); 655 nfsm_srvpostop_attr(1, (struct vattr *)0); 656 return (0); 657 } 658 if (vp->v_type != VREG) { 659 if (v3) 660 error = EINVAL; 661 else 662 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 663 } 664 if (!error) { 665 nqsrv_getl(vp, ND_READ); 666 if ((error = nfsrv_access(vp, VREAD, cred, rdonly, lwp, 1)) != 0) 667 error = nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 1); 668 } 669 getret = VOP_GETATTR(vp, &va, cred); 670 if (!error) 671 error = getret; 672 if (error) { 673 vput(vp); 674 nfsm_reply(NFSX_POSTOPATTR(v3)); 675 nfsm_srvpostop_attr(getret, &va); 676 return (0); 677 } 678 if (off >= va.va_size) 679 cnt = 0; 680 else if ((off + reqlen) > va.va_size) 681 cnt = va.va_size - off; 682 else 683 cnt = reqlen; 684 nfsm_reply(NFSX_POSTOPORFATTR(v3) + 3 * NFSX_UNSIGNED+nfsm_rndup(cnt)); 685 if (v3) { 686 nfsm_build(tl, u_int32_t *, NFSX_V3FATTR + 4 * NFSX_UNSIGNED); 687 *tl++ = nfs_true; 688 fp = (struct nfs_fattr *)tl; 689 tl += (NFSX_V3FATTR / sizeof (u_int32_t)); 690 } else { 691 nfsm_build(tl, u_int32_t *, NFSX_V2FATTR + NFSX_UNSIGNED); 692 fp = (struct nfs_fattr *)tl; 693 tl += (NFSX_V2FATTR / sizeof (u_int32_t)); 694 } 695 len = left = cnt; 696 if (cnt > 0) { 697 if (nfsd_use_loan) { 698 struct vm_page **pgpp; 699 voff_t pgoff = trunc_page(off); 700 int npages; 701 vaddr_t lva; 702 703 npages = (round_page(off + cnt) - pgoff) >> PAGE_SHIFT; 704 KASSERT(npages <= M_EXT_MAXPAGES); /* XXX */ 705 706 /* allocate kva for mbuf data */ 707 lva = sokvaalloc(pgoff, npages << PAGE_SHIFT, 708 slp->ns_so); 709 if (lva == 0) { 710 /* fall back to VOP_READ */ 711 goto loan_fail; 712 } 713 714 /* allocate mbuf */ 715 m = m_get(M_WAIT, MT_DATA); 716 MCLAIM(m, &nfs_mowner); 717 pgpp = m->m_ext.ext_pgs; 718 719 /* loan pages */ 720 error = uvm_loanuobjpages(&vp->v_uobj, pgoff, npages, 721 pgpp); 722 if (error) { 723 sokvafree(lva, npages << PAGE_SHIFT); 724 m_free(m); 725 if (error == EBUSY) 726 goto loan_fail; 727 goto read_error; 728 } 729 730 /* associate kva to mbuf */ 731 MEXTADD(m, (void *)(lva + ((vaddr_t)off & PAGE_MASK)), 732 cnt, M_MBUF, soloanfree, slp->ns_so); 733 m->m_flags |= M_EXT_PAGES | M_EXT_ROMAP; 734 m->m_len = cnt; 735 736 /* map pages */ 737 for (i = 0; i < npages; i++) { 738 pmap_kenter_pa(lva, VM_PAGE_TO_PHYS(pgpp[i]), 739 VM_PROT_READ, 0); 740 lva += PAGE_SIZE; 741 } 742 743 pmap_update(pmap_kernel()); 744 745 mb->m_next = m; 746 mb = m; 747 error = 0; 748 uiop->uio_resid = 0; 749 } else { 750 struct iovec *iv; 751 struct iovec *iv2; 752 struct mbuf *m2; 753 int siz; 754 loan_fail: 755 /* 756 * Generate the mbuf list with the uio_iov ref. to it. 757 */ 758 i = 0; 759 m = m2 = mb; 760 while (left > 0) { 761 siz = min(M_TRAILINGSPACE(m), left); 762 if (siz > 0) { 763 left -= siz; 764 i++; 765 } 766 if (left > 0) { 767 m = m_get(M_WAIT, MT_DATA); 768 MCLAIM(m, &nfs_mowner); 769 m_clget(m, M_WAIT); 770 m->m_len = 0; 771 m2->m_next = m; 772 m2 = m; 773 } 774 } 775 iv = malloc(i * sizeof(struct iovec), M_TEMP, M_WAITOK); 776 uiop->uio_iov = iv2 = iv; 777 m = mb; 778 left = cnt; 779 i = 0; 780 while (left > 0) { 781 if (m == NULL) 782 panic("nfsrv_read iov"); 783 siz = min(M_TRAILINGSPACE(m), left); 784 if (siz > 0) { 785 iv->iov_base = mtod(m, char *) + 786 m->m_len; 787 iv->iov_len = siz; 788 m->m_len += siz; 789 left -= siz; 790 iv++; 791 i++; 792 } 793 m = m->m_next; 794 } 795 uiop->uio_iovcnt = i; 796 uiop->uio_offset = off; 797 uiop->uio_resid = cnt; 798 uiop->uio_rw = UIO_READ; 799 UIO_SETUP_SYSSPACE(uiop); 800 error = VOP_READ(vp, uiop, IO_NODELOCKED, cred); 801 free((void *)iv2, M_TEMP); 802 } 803 read_error: 804 if (error || (getret = VOP_GETATTR(vp, &va, cred)) != 0){ 805 if (!error) 806 error = getret; 807 m_freem(mreq); 808 vput(vp); 809 nfsm_reply(NFSX_POSTOPATTR(v3)); 810 nfsm_srvpostop_attr(getret, &va); 811 return (0); 812 } 813 } else { 814 uiop->uio_resid = 0; 815 } 816 vput(vp); 817 nfsm_srvfillattr(&va, fp); 818 len -= uiop->uio_resid; 819 padlen = nfsm_padlen(len); 820 if (uiop->uio_resid || padlen) 821 nfs_zeropad(mb, uiop->uio_resid, padlen); 822 if (v3) { 823 /* count */ 824 *tl++ = txdr_unsigned(len); 825 /* eof */ 826 if (off + len >= va.va_size) 827 *tl++ = nfs_true; 828 else 829 *tl++ = nfs_false; 830 } 831 *tl = txdr_unsigned(len); 832 nfsm_srvdone; 833 } 834 835 /* 836 * nfs write service 837 */ 838 int 839 nfsrv_write(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 840 { 841 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 842 struct mbuf *nam = nfsd->nd_nam; 843 char *dpos = nfsd->nd_dpos; 844 kauth_cred_t cred = nfsd->nd_cr; 845 struct iovec *ivp; 846 int i, cnt; 847 struct mbuf *mp; 848 struct nfs_fattr *fp; 849 struct iovec *iv; 850 struct vattr va, forat; 851 u_int32_t *tl; 852 int32_t t1; 853 char *bpos; 854 int error = 0, rdonly, cache = 0, len, forat_ret = 1; 855 int ioflags, aftat_ret = 1, retlen, zeroing, adjust; 856 int stable = NFSV3WRITE_FILESYNC; 857 int v3 = (nfsd->nd_flag & ND_NFSV3); 858 char *cp2; 859 struct mbuf *mb, *mreq __unused; 860 struct vnode *vp; 861 nfsrvfh_t nsfh; 862 struct uio io, *uiop = &io; 863 off_t off; 864 u_quad_t frev; 865 866 if (mrep == NULL) { 867 *mrq = NULL; 868 return (0); 869 } 870 nfsm_srvmtofh(&nsfh); 871 if (v3) { 872 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 873 off = fxdr_hyper(tl); 874 tl += 3; 875 stable = fxdr_unsigned(int, *tl++); 876 } else { 877 nfsm_dissect(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 878 off = (off_t)fxdr_unsigned(u_int32_t, *++tl); 879 tl += 2; 880 } 881 retlen = len = fxdr_unsigned(int32_t, *tl); 882 cnt = i = 0; 883 884 /* 885 * For NFS Version 2, it is not obvious what a write of zero length 886 * should do, but I might as well be consistent with Version 3, 887 * which is to return ok so long as there are no permission problems. 888 */ 889 if (len > 0) { 890 zeroing = 1; 891 mp = mrep; 892 while (mp) { 893 if (mp == md) { 894 zeroing = 0; 895 adjust = dpos - mtod(mp, char *); 896 mp->m_len -= adjust; 897 if (mp->m_len > 0 && adjust > 0) 898 NFSMADV(mp, adjust); 899 } 900 if (zeroing) 901 mp->m_len = 0; 902 else if (mp->m_len > 0) { 903 i += mp->m_len; 904 if (i > len) { 905 mp->m_len -= (i - len); 906 zeroing = 1; 907 } 908 if (mp->m_len > 0) 909 cnt++; 910 } 911 mp = mp->m_next; 912 } 913 } 914 if (len > NFS_MAXDATA || len < 0 || i < len) { 915 error = EIO; 916 nfsm_reply(2 * NFSX_UNSIGNED); 917 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 918 return (0); 919 } 920 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 921 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 922 if (error) { 923 nfsm_reply(2 * NFSX_UNSIGNED); 924 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 925 return (0); 926 } 927 if (v3) 928 forat_ret = VOP_GETATTR(vp, &forat, cred); 929 if (vp->v_type != VREG) { 930 if (v3) 931 error = EINVAL; 932 else 933 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 934 } 935 if (!error) { 936 nqsrv_getl(vp, ND_WRITE); 937 error = nfsrv_access(vp, VWRITE, cred, rdonly, lwp, 1); 938 } 939 if (error) { 940 vput(vp); 941 nfsm_reply(NFSX_WCCDATA(v3)); 942 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 943 return (0); 944 } 945 946 if (len > 0) { 947 ivp = malloc(cnt * sizeof (struct iovec), M_TEMP, M_WAITOK); 948 uiop->uio_iov = iv = ivp; 949 uiop->uio_iovcnt = cnt; 950 mp = mrep; 951 while (mp) { 952 if (mp->m_len > 0) { 953 ivp->iov_base = mtod(mp, void *); 954 ivp->iov_len = mp->m_len; 955 ivp++; 956 } 957 mp = mp->m_next; 958 } 959 960 /* 961 * XXX 962 * The IO_METASYNC flag indicates that all metadata (and not 963 * just enough to ensure data integrity) must be written to 964 * stable storage synchronously. 965 * (IO_METASYNC is not yet implemented in 4.4BSD-Lite.) 966 */ 967 if (stable == NFSV3WRITE_UNSTABLE) 968 ioflags = IO_NODELOCKED; 969 else if (stable == NFSV3WRITE_DATASYNC) 970 ioflags = (IO_SYNC | IO_NODELOCKED); 971 else 972 ioflags = (IO_METASYNC | IO_SYNC | IO_NODELOCKED); 973 uiop->uio_resid = len; 974 uiop->uio_rw = UIO_WRITE; 975 uiop->uio_offset = off; 976 UIO_SETUP_SYSSPACE(uiop); 977 error = VOP_WRITE(vp, uiop, ioflags, cred); 978 nfsstats.srvvop_writes++; 979 free(iv, M_TEMP); 980 } 981 aftat_ret = VOP_GETATTR(vp, &va, cred); 982 vput(vp); 983 if (!error) 984 error = aftat_ret; 985 nfsm_reply(NFSX_PREOPATTR(v3) + NFSX_POSTOPORFATTR(v3) + 986 2 * NFSX_UNSIGNED + NFSX_WRITEVERF(v3)); 987 if (v3) { 988 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 989 if (error) 990 return (0); 991 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 992 *tl++ = txdr_unsigned(retlen); 993 if (stable == NFSV3WRITE_UNSTABLE) 994 *tl++ = txdr_unsigned(stable); 995 else 996 *tl++ = txdr_unsigned(NFSV3WRITE_FILESYNC); 997 /* 998 * Actually, there is no need to txdr these fields, 999 * but it may make the values more human readable, 1000 * for debugging purposes. 1001 */ 1002 *tl++ = txdr_unsigned(boottime.tv_sec); 1003 *tl = txdr_unsigned(boottime.tv_nsec / 1000); 1004 } else { 1005 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 1006 nfsm_srvfillattr(&va, fp); 1007 } 1008 nfsm_srvdone; 1009 } 1010 1011 /* 1012 * XXX elad: the original NFSW_SAMECRED() macro also made sure the 1013 * two nd_flag fields of the descriptors contained 1014 * ND_KERBAUTH. 1015 */ 1016 static int 1017 nfsrv_samecred(kauth_cred_t cred1, kauth_cred_t cred2) 1018 { 1019 int i, do_ngroups; 1020 1021 if (kauth_cred_geteuid(cred1) != kauth_cred_geteuid(cred2)) 1022 return (0); 1023 if (kauth_cred_ngroups(cred1) != kauth_cred_ngroups(cred2)) 1024 return (0); 1025 do_ngroups = kauth_cred_ngroups(cred1); 1026 for (i = 0; i < do_ngroups; i++) 1027 if (kauth_cred_group(cred1, i) != 1028 kauth_cred_group(cred2, i)) 1029 return (0); 1030 1031 return (1); 1032 } 1033 1034 static struct nfsrvw_delayhash * 1035 nfsrv_nwdelayhash(struct nfssvc_sock *slp, const nfsrvfh_t *nsfh) 1036 { 1037 uint32_t hash; 1038 1039 hash = hash32_buf(NFSRVFH_DATA(nsfh), NFSRVFH_SIZE(nsfh), 1040 HASH32_BUF_INIT); 1041 return &slp->ns_wdelayhashtbl[hash % NFS_WDELAYHASHSIZ]; 1042 } 1043 1044 /* 1045 * NFS write service with write gathering support. Called when 1046 * nfsrvw_procrastinate > 0. 1047 * See: Chet Juszczak, "Improving the Write Performance of an NFS Server", 1048 * in Proc. of the Winter 1994 Usenix Conference, pg. 247-259, San Franscisco, 1049 * Jan. 1994. 1050 */ 1051 int 1052 nfsrv_writegather(struct nfsrv_descript **ndp, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 1053 { 1054 struct timeval now; 1055 struct iovec *ivp; 1056 struct mbuf *mp; 1057 struct nfsrv_descript *wp, *nfsd, *owp, *swp; 1058 struct nfs_fattr *fp; 1059 int i = 0; 1060 struct iovec *iov; 1061 struct nfsrvw_delayhash *wpp; 1062 kauth_cred_t cred; 1063 struct vattr va, forat; 1064 u_int32_t *tl; 1065 int32_t t1; 1066 char *bpos, *dpos; 1067 int error = 0, rdonly, cache = 0, len = 0, forat_ret = 1; 1068 int ioflags, aftat_ret = 1, adjust, v3, zeroing; 1069 char *cp2; 1070 struct mbuf *mb, *mreq, *mrep, *md; 1071 struct vnode *vp; 1072 struct uio io, *uiop = &io; 1073 u_quad_t frev, cur_usec; 1074 1075 *mrq = NULL; 1076 if (*ndp) { 1077 nfsd = *ndp; 1078 *ndp = NULL; 1079 mrep = nfsd->nd_mrep; 1080 md = nfsd->nd_md; 1081 dpos = nfsd->nd_dpos; 1082 cred = nfsd->nd_cr; 1083 v3 = (nfsd->nd_flag & ND_NFSV3); 1084 LIST_INIT(&nfsd->nd_coalesce); 1085 nfsd->nd_mreq = NULL; 1086 nfsd->nd_stable = NFSV3WRITE_FILESYNC; 1087 getmicrotime(&now); 1088 cur_usec = (u_quad_t)now.tv_sec * 1000000 + (u_quad_t)now.tv_usec; 1089 nfsd->nd_time = cur_usec + nfsrvw_procrastinate; 1090 1091 /* 1092 * Now, get the write header.. 1093 */ 1094 nfsm_srvmtofh(&nfsd->nd_fh); 1095 if (v3) { 1096 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 1097 nfsd->nd_off = fxdr_hyper(tl); 1098 tl += 3; 1099 nfsd->nd_stable = fxdr_unsigned(int, *tl++); 1100 } else { 1101 nfsm_dissect(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1102 nfsd->nd_off = (off_t)fxdr_unsigned(u_int32_t, *++tl); 1103 tl += 2; 1104 } 1105 len = fxdr_unsigned(int32_t, *tl); 1106 nfsd->nd_len = len; 1107 nfsd->nd_eoff = nfsd->nd_off + len; 1108 1109 /* 1110 * Trim the header out of the mbuf list and trim off any trailing 1111 * junk so that the mbuf list has only the write data. 1112 */ 1113 zeroing = 1; 1114 i = 0; 1115 mp = mrep; 1116 while (mp) { 1117 if (mp == md) { 1118 zeroing = 0; 1119 adjust = dpos - mtod(mp, char *); 1120 mp->m_len -= adjust; 1121 if (mp->m_len > 0 && adjust > 0) 1122 NFSMADV(mp, adjust); 1123 } 1124 if (zeroing) 1125 mp->m_len = 0; 1126 else { 1127 i += mp->m_len; 1128 if (i > len) { 1129 mp->m_len -= (i - len); 1130 zeroing = 1; 1131 } 1132 } 1133 mp = mp->m_next; 1134 } 1135 if (len > NFS_MAXDATA || len < 0 || i < len) { 1136 nfsmout: 1137 m_freem(mrep); 1138 error = EIO; 1139 nfsm_writereply(2 * NFSX_UNSIGNED, v3); 1140 if (v3) 1141 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1142 nfsd->nd_mreq = mreq; 1143 nfsd->nd_mrep = NULL; 1144 nfsd->nd_time = 0; 1145 } 1146 1147 /* 1148 * Add this entry to the hash and time queues. 1149 */ 1150 owp = NULL; 1151 mutex_enter(&nfsd_lock); 1152 wp = LIST_FIRST(&slp->ns_tq); 1153 while (wp && wp->nd_time < nfsd->nd_time) { 1154 owp = wp; 1155 wp = LIST_NEXT(wp, nd_tq); 1156 } 1157 if (owp) { 1158 LIST_INSERT_AFTER(owp, nfsd, nd_tq); 1159 } else { 1160 LIST_INSERT_HEAD(&slp->ns_tq, nfsd, nd_tq); 1161 } 1162 if (nfsd->nd_mrep) { 1163 wpp = nfsrv_nwdelayhash(slp, &nfsd->nd_fh); 1164 owp = NULL; 1165 wp = LIST_FIRST(wpp); 1166 while (wp && nfsrv_comparefh(&nfsd->nd_fh, &wp->nd_fh)) { 1167 owp = wp; 1168 wp = LIST_NEXT(wp, nd_hash); 1169 } 1170 while (wp && wp->nd_off < nfsd->nd_off && 1171 !nfsrv_comparefh(&nfsd->nd_fh, &wp->nd_fh)) { 1172 owp = wp; 1173 wp = LIST_NEXT(wp, nd_hash); 1174 } 1175 if (owp) { 1176 LIST_INSERT_AFTER(owp, nfsd, nd_hash); 1177 1178 /* 1179 * Search the hash list for overlapping entries and 1180 * coalesce. 1181 */ 1182 for(; nfsd && NFSW_CONTIG(owp, nfsd); nfsd = wp) { 1183 wp = LIST_NEXT(nfsd, nd_hash); 1184 if (nfsrv_samecred(owp->nd_cr, nfsd->nd_cr)) 1185 nfsrvw_coalesce(owp, nfsd); 1186 } 1187 } else { 1188 LIST_INSERT_HEAD(wpp, nfsd, nd_hash); 1189 } 1190 } 1191 mutex_exit(&nfsd_lock); 1192 } 1193 1194 /* 1195 * Now, do VOP_WRITE()s for any one(s) that need to be done now 1196 * and generate the associated reply mbuf list(s). 1197 */ 1198 loop1: 1199 getmicrotime(&now); 1200 cur_usec = (u_quad_t)now.tv_sec * 1000000 + (u_quad_t)now.tv_usec; 1201 mutex_enter(&nfsd_lock); 1202 for (nfsd = LIST_FIRST(&slp->ns_tq); nfsd; nfsd = owp) { 1203 owp = LIST_NEXT(nfsd, nd_tq); 1204 if (nfsd->nd_time > cur_usec) 1205 break; 1206 if (nfsd->nd_mreq) 1207 continue; 1208 LIST_REMOVE(nfsd, nd_tq); 1209 LIST_REMOVE(nfsd, nd_hash); 1210 mutex_exit(&nfsd_lock); 1211 1212 mrep = nfsd->nd_mrep; 1213 nfsd->nd_mrep = NULL; 1214 cred = nfsd->nd_cr; 1215 v3 = (nfsd->nd_flag & ND_NFSV3); 1216 forat_ret = aftat_ret = 1; 1217 error = nfsrv_fhtovp(&nfsd->nd_fh, 1, &vp, cred, slp, 1218 nfsd->nd_nam, &rdonly, (nfsd->nd_flag & ND_KERBAUTH), 1219 false); 1220 if (!error) { 1221 if (v3) 1222 forat_ret = VOP_GETATTR(vp, &forat, cred); 1223 if (vp->v_type != VREG) { 1224 if (v3) 1225 error = EINVAL; 1226 else 1227 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 1228 } 1229 } else 1230 vp = NULL; 1231 if (!error) { 1232 nqsrv_getl(vp, ND_WRITE); 1233 error = nfsrv_access(vp, VWRITE, cred, rdonly, lwp, 1); 1234 } 1235 1236 if (nfsd->nd_stable == NFSV3WRITE_UNSTABLE) 1237 ioflags = IO_NODELOCKED; 1238 else if (nfsd->nd_stable == NFSV3WRITE_DATASYNC) 1239 ioflags = (IO_SYNC | IO_NODELOCKED); 1240 else 1241 ioflags = (IO_METASYNC | IO_SYNC | IO_NODELOCKED); 1242 uiop->uio_rw = UIO_WRITE; 1243 uiop->uio_offset = nfsd->nd_off; 1244 uiop->uio_resid = nfsd->nd_eoff - nfsd->nd_off; 1245 UIO_SETUP_SYSSPACE(uiop); 1246 if (uiop->uio_resid > 0) { 1247 mp = mrep; 1248 i = 0; 1249 while (mp) { 1250 if (mp->m_len > 0) 1251 i++; 1252 mp = mp->m_next; 1253 } 1254 uiop->uio_iovcnt = i; 1255 iov = malloc(i * sizeof (struct iovec), M_TEMP, M_WAITOK); 1256 uiop->uio_iov = ivp = iov; 1257 mp = mrep; 1258 while (mp) { 1259 if (mp->m_len > 0) { 1260 ivp->iov_base = mtod(mp, void *); 1261 ivp->iov_len = mp->m_len; 1262 ivp++; 1263 } 1264 mp = mp->m_next; 1265 } 1266 if (!error) { 1267 error = VOP_WRITE(vp, uiop, ioflags, cred); 1268 nfsstats.srvvop_writes++; 1269 } 1270 free((void *)iov, M_TEMP); 1271 } 1272 m_freem(mrep); 1273 if (vp) { 1274 aftat_ret = VOP_GETATTR(vp, &va, cred); 1275 vput(vp); 1276 } 1277 1278 /* 1279 * Loop around generating replies for all write rpcs that have 1280 * now been completed. 1281 */ 1282 swp = nfsd; 1283 do { 1284 if (error) { 1285 nfsm_writereply(NFSX_WCCDATA(v3), v3); 1286 if (v3) { 1287 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1288 } 1289 } else { 1290 nfsm_writereply(NFSX_PREOPATTR(v3) + 1291 NFSX_POSTOPORFATTR(v3) + 2 * NFSX_UNSIGNED + 1292 NFSX_WRITEVERF(v3), v3); 1293 if (v3) { 1294 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1295 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1296 *tl++ = txdr_unsigned(nfsd->nd_len); 1297 *tl++ = txdr_unsigned(swp->nd_stable); 1298 /* 1299 * Actually, there is no need to txdr these fields, 1300 * but it may make the values more human readable, 1301 * for debugging purposes. 1302 */ 1303 *tl++ = txdr_unsigned(boottime.tv_sec); 1304 *tl = txdr_unsigned(boottime.tv_nsec / 1000); 1305 } else { 1306 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 1307 nfsm_srvfillattr(&va, fp); 1308 } 1309 } 1310 nfsd->nd_mreq = mreq; 1311 if (nfsd->nd_mrep) 1312 panic("nfsrv_write: nd_mrep not free"); 1313 1314 /* 1315 * Done. Put it at the head of the timer queue so that 1316 * the final phase can return the reply. 1317 */ 1318 mutex_enter(&nfsd_lock); 1319 if (nfsd != swp) { 1320 nfsd->nd_time = 0; 1321 LIST_INSERT_HEAD(&slp->ns_tq, nfsd, nd_tq); 1322 } 1323 nfsd = LIST_FIRST(&swp->nd_coalesce); 1324 if (nfsd) { 1325 LIST_REMOVE(nfsd, nd_tq); 1326 } 1327 mutex_exit(&nfsd_lock); 1328 } while (nfsd); 1329 swp->nd_time = 0; 1330 1331 mutex_enter(&nfsd_lock); 1332 LIST_INSERT_HEAD(&slp->ns_tq, swp, nd_tq); 1333 mutex_exit(&nfsd_lock); 1334 goto loop1; 1335 } 1336 mutex_exit(&nfsd_lock); 1337 nfs_timer_start(); 1338 1339 /* 1340 * Search for a reply to return. 1341 */ 1342 mutex_enter(&nfsd_lock); 1343 LIST_FOREACH(nfsd, &slp->ns_tq, nd_tq) { 1344 if (nfsd->nd_mreq) { 1345 LIST_REMOVE(nfsd, nd_tq); 1346 *mrq = nfsd->nd_mreq; 1347 *ndp = nfsd; 1348 break; 1349 } 1350 } 1351 mutex_exit(&nfsd_lock); 1352 return (0); 1353 } 1354 1355 /* 1356 * Coalesce the write request nfsd into owp. To do this we must: 1357 * - remove nfsd from the queues 1358 * - merge nfsd->nd_mrep into owp->nd_mrep 1359 * - update the nd_eoff and nd_stable for owp 1360 * - put nfsd on owp's nd_coalesce list 1361 * NB: Must be called at splsoftclock(). 1362 */ 1363 void 1364 nfsrvw_coalesce(struct nfsrv_descript *owp, struct nfsrv_descript *nfsd) 1365 { 1366 int overlap; 1367 struct mbuf *mp; 1368 struct nfsrv_descript *m; 1369 1370 KASSERT(mutex_owned(&nfsd_lock)); 1371 1372 LIST_REMOVE(nfsd, nd_hash); 1373 LIST_REMOVE(nfsd, nd_tq); 1374 if (owp->nd_eoff < nfsd->nd_eoff) { 1375 overlap = owp->nd_eoff - nfsd->nd_off; 1376 if (overlap < 0) 1377 panic("nfsrv_coalesce: bad off"); 1378 if (overlap > 0) 1379 m_adj(nfsd->nd_mrep, overlap); 1380 mp = owp->nd_mrep; 1381 while (mp->m_next) 1382 mp = mp->m_next; 1383 mp->m_next = nfsd->nd_mrep; 1384 owp->nd_eoff = nfsd->nd_eoff; 1385 } else 1386 m_freem(nfsd->nd_mrep); 1387 nfsd->nd_mrep = NULL; 1388 if (nfsd->nd_stable == NFSV3WRITE_FILESYNC) 1389 owp->nd_stable = NFSV3WRITE_FILESYNC; 1390 else if (nfsd->nd_stable == NFSV3WRITE_DATASYNC && 1391 owp->nd_stable == NFSV3WRITE_UNSTABLE) 1392 owp->nd_stable = NFSV3WRITE_DATASYNC; 1393 LIST_INSERT_HEAD(&owp->nd_coalesce, nfsd, nd_tq); 1394 /* 1395 * nfsd might hold coalesce elements! Move them to owp. 1396 * Otherwise, requests may be lost and clients will be stuck. 1397 */ 1398 while ((m = LIST_FIRST(&nfsd->nd_coalesce)) != NULL) { 1399 LIST_REMOVE(m, nd_tq); 1400 LIST_INSERT_HEAD(&owp->nd_coalesce, m, nd_tq); 1401 } 1402 } 1403 1404 /* 1405 * nfs create service 1406 * now does a truncate to 0 length via. setattr if it already exists 1407 */ 1408 int 1409 nfsrv_create(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 1410 { 1411 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1412 struct mbuf *nam = nfsd->nd_nam; 1413 char *dpos = nfsd->nd_dpos; 1414 kauth_cred_t cred = nfsd->nd_cr; 1415 struct nfs_fattr *fp; 1416 struct vattr va, dirfor, diraft; 1417 struct nfsv2_sattr *sp; 1418 u_int32_t *tl; 1419 struct nameidata nd; 1420 char *cp; 1421 int32_t t1; 1422 char *bpos; 1423 int error = 0, cache = 0, len, tsize, dirfor_ret = 1, diraft_ret = 1; 1424 int rdev = 0, abort = 0; 1425 int v3 = (nfsd->nd_flag & ND_NFSV3), how, exclusive_flag = 0; 1426 char *cp2; 1427 struct mbuf *mb, *mreq __unused; 1428 struct vnode *vp = NULL, *dirp = NULL; 1429 nfsrvfh_t nsfh; 1430 u_quad_t frev, tempsize; 1431 u_char cverf[NFSX_V3CREATEVERF]; 1432 1433 nd.ni_cnd.cn_nameiop = 0; 1434 nfsm_srvmtofh(&nsfh); 1435 nfsm_srvnamesiz(len); 1436 nd.ni_cnd.cn_cred = cred; 1437 nd.ni_cnd.cn_nameiop = CREATE; 1438 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 1439 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 1440 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 1441 if (dirp && v3) { 1442 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); 1443 } 1444 if (error) { 1445 nfsm_reply(NFSX_WCCDATA(v3)); 1446 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1447 if (dirp) 1448 vrele(dirp); 1449 if (nd.ni_pathbuf != NULL) { 1450 pathbuf_destroy(nd.ni_pathbuf); 1451 nd.ni_pathbuf = NULL; 1452 } 1453 return (0); 1454 } 1455 abort = 1; 1456 vattr_null(&va); 1457 if (v3) { 1458 va.va_mode = 0; 1459 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1460 how = fxdr_unsigned(int, *tl); 1461 switch (how) { 1462 case NFSV3CREATE_GUARDED: 1463 if (nd.ni_vp) { 1464 error = EEXIST; 1465 break; 1466 } 1467 case NFSV3CREATE_UNCHECKED: 1468 nfsm_srvsattr(&va); 1469 break; 1470 case NFSV3CREATE_EXCLUSIVE: 1471 nfsm_dissect(cp, void *, NFSX_V3CREATEVERF); 1472 memcpy(cverf, cp, NFSX_V3CREATEVERF); 1473 exclusive_flag = 1; 1474 break; 1475 }; 1476 va.va_type = VREG; 1477 } else { 1478 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1479 va.va_type = IFTOVT(fxdr_unsigned(u_int32_t, sp->sa_mode)); 1480 if (va.va_type == VNON) 1481 va.va_type = VREG; 1482 va.va_mode = nfstov_mode(sp->sa_mode); 1483 switch (va.va_type) { 1484 case VREG: 1485 tsize = fxdr_unsigned(int32_t, sp->sa_size); 1486 if (tsize != -1) 1487 va.va_size = (u_quad_t)tsize; 1488 break; 1489 case VCHR: 1490 case VBLK: 1491 case VFIFO: 1492 rdev = fxdr_unsigned(int32_t, sp->sa_size); 1493 break; 1494 default: 1495 break; 1496 }; 1497 } 1498 1499 /* 1500 * Iff doesn't exist, create it 1501 * otherwise just truncate to 0 length 1502 * should I set the mode too ?? 1503 */ 1504 if (nd.ni_vp == NULL) { 1505 if (va.va_type == VREG || va.va_type == VSOCK) { 1506 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1507 error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1508 if (!error) { 1509 vn_lock(nd.ni_vp, LK_EXCLUSIVE | LK_RETRY); 1510 if (exclusive_flag) { 1511 exclusive_flag = 0; 1512 vattr_null(&va); 1513 /* 1514 * XXX 1515 * assuming NFSX_V3CREATEVERF 1516 * == sizeof(nfstime3) 1517 */ 1518 fxdr_nfsv3time(cverf, &va.va_atime); 1519 error = VOP_SETATTR(nd.ni_vp, &va, 1520 cred); 1521 } 1522 } 1523 } else if (va.va_type == VCHR || va.va_type == VBLK || 1524 va.va_type == VFIFO) { 1525 if (va.va_type == VCHR && rdev == 0xffffffff) 1526 va.va_type = VFIFO; 1527 if (va.va_type != VFIFO && 1528 (error = kauth_authorize_system(cred, 1529 KAUTH_SYSTEM_MKNOD, 0, NULL, NULL, NULL))) { 1530 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1531 vput(nd.ni_dvp); 1532 abort = 0; 1533 nfsm_reply(0); 1534 if (nd.ni_pathbuf != NULL) { 1535 pathbuf_destroy(nd.ni_pathbuf); 1536 nd.ni_pathbuf = NULL; 1537 } 1538 return (error); 1539 } else 1540 va.va_rdev = (dev_t)rdev; 1541 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1542 error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, 1543 &va); 1544 if (!error) { 1545 vn_lock(nd.ni_vp, LK_EXCLUSIVE | LK_RETRY); 1546 } else { 1547 nfsm_reply(0); 1548 } 1549 } else { 1550 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1551 if (nd.ni_pathbuf != NULL) { 1552 pathbuf_destroy(nd.ni_pathbuf); 1553 nd.ni_pathbuf = NULL; 1554 } 1555 error = ENXIO; 1556 abort = 0; 1557 } 1558 vp = nd.ni_vp; 1559 } else { 1560 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1561 if (nd.ni_pathbuf != NULL) { 1562 pathbuf_destroy(nd.ni_pathbuf); 1563 nd.ni_pathbuf = NULL; 1564 } 1565 vp = nd.ni_vp; 1566 abort = 0; 1567 if (!error && va.va_size != -1) { 1568 error = nfsrv_access(vp, VWRITE, cred, 1569 (nd.ni_cnd.cn_flags & RDONLY), lwp, 0); 1570 if (!error) { 1571 nqsrv_getl(vp, ND_WRITE); 1572 tempsize = va.va_size; 1573 vattr_null(&va); 1574 va.va_size = tempsize; 1575 error = VOP_SETATTR(vp, &va, cred); 1576 } 1577 } 1578 if (error) 1579 vput(vp); 1580 } 1581 if (!error) { 1582 error = nfsrv_composefh(vp, &nsfh, v3); 1583 if (!error) 1584 error = VOP_GETATTR(vp, &va, cred); 1585 vput(vp); 1586 } 1587 if (nd.ni_dvp == vp) 1588 vrele(nd.ni_dvp); 1589 else 1590 vput(nd.ni_dvp); 1591 if (v3) { 1592 if (exclusive_flag && !error) { 1593 /* 1594 * XXX assuming NFSX_V3CREATEVERF == sizeof(nfstime3) 1595 */ 1596 char oldverf[NFSX_V3CREATEVERF]; 1597 1598 txdr_nfsv3time(&va.va_atime, oldverf); 1599 if (memcmp(cverf, oldverf, NFSX_V3CREATEVERF)) 1600 error = EEXIST; 1601 } 1602 if (dirp) { 1603 vn_lock(dirp, LK_SHARED | LK_RETRY); 1604 diraft_ret = VOP_GETATTR(dirp, &diraft, cred); 1605 VOP_UNLOCK(dirp); 1606 } 1607 } 1608 if (dirp) { 1609 vrele(dirp); 1610 dirp = NULL; 1611 } 1612 if (nd.ni_pathbuf != NULL) { 1613 pathbuf_destroy(nd.ni_pathbuf); 1614 nd.ni_pathbuf = NULL; 1615 } 1616 abort = 0; 1617 nfsm_reply(NFSX_SRVFH(&nsfh, v3) + NFSX_FATTR(v3) + NFSX_WCCDATA(v3)); 1618 if (v3) { 1619 if (!error) { 1620 nfsm_srvpostop_fh(&nsfh); 1621 nfsm_srvpostop_attr(0, &va); 1622 } 1623 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1624 } else { 1625 nfsm_srvfhtom(&nsfh, v3); 1626 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 1627 nfsm_srvfillattr(&va, fp); 1628 } 1629 return (0); 1630 nfsmout: 1631 if (dirp) 1632 vrele(dirp); 1633 if (abort) { 1634 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1635 if (nd.ni_dvp == nd.ni_vp) 1636 vrele(nd.ni_dvp); 1637 else 1638 vput(nd.ni_dvp); 1639 if (nd.ni_vp) 1640 vput(nd.ni_vp); 1641 } 1642 if (nd.ni_pathbuf != NULL) { 1643 pathbuf_destroy(nd.ni_pathbuf); 1644 nd.ni_pathbuf = NULL; 1645 } 1646 return (error); 1647 } 1648 1649 /* 1650 * nfs v3 mknod service 1651 */ 1652 int 1653 nfsrv_mknod(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 1654 { 1655 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1656 struct mbuf *nam = nfsd->nd_nam; 1657 char *dpos = nfsd->nd_dpos; 1658 kauth_cred_t cred = nfsd->nd_cr; 1659 struct vattr va, dirfor, diraft; 1660 u_int32_t *tl; 1661 struct nameidata nd; 1662 int32_t t1; 1663 char *bpos; 1664 int error = 0, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 1665 int abort = 0; 1666 u_int32_t major, minor; 1667 enum vtype vtyp; 1668 char *cp2; 1669 struct mbuf *mb, *mreq __unused; 1670 struct vnode *vp, *dirp = (struct vnode *)0; 1671 nfsrvfh_t nsfh; 1672 u_quad_t frev; 1673 1674 nd.ni_cnd.cn_nameiop = 0; 1675 nfsm_srvmtofh(&nsfh); 1676 nfsm_srvnamesiz(len); 1677 nd.ni_cnd.cn_cred = cred; 1678 nd.ni_cnd.cn_nameiop = CREATE; 1679 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 1680 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 1681 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 1682 if (dirp) 1683 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); 1684 if (error) { 1685 nfsm_reply(NFSX_WCCDATA(1)); 1686 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1687 if (dirp) 1688 vrele(dirp); 1689 if (nd.ni_pathbuf != NULL) { 1690 pathbuf_destroy(nd.ni_pathbuf); 1691 nd.ni_pathbuf = NULL; 1692 } 1693 return (0); 1694 } 1695 abort = 1; 1696 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1697 vtyp = nfsv3tov_type(*tl); 1698 if (vtyp != VCHR && vtyp != VBLK && vtyp != VSOCK && vtyp != VFIFO) { 1699 error = NFSERR_BADTYPE; 1700 goto abort; 1701 } 1702 vattr_null(&va); 1703 va.va_mode = 0; 1704 nfsm_srvsattr(&va); 1705 if (vtyp == VCHR || vtyp == VBLK) { 1706 dev_t rdev; 1707 1708 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1709 major = fxdr_unsigned(u_int32_t, *tl++); 1710 minor = fxdr_unsigned(u_int32_t, *tl); 1711 rdev = makedev(major, minor); 1712 if (major(rdev) != major || minor(rdev) != minor) { 1713 error = EINVAL; 1714 goto abort; 1715 } 1716 va.va_rdev = rdev; 1717 } 1718 1719 /* 1720 * Iff doesn't exist, create it. 1721 */ 1722 if (nd.ni_vp) { 1723 error = EEXIST; 1724 abort: 1725 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1726 if (nd.ni_vp) 1727 vput(nd.ni_vp); 1728 if (nd.ni_pathbuf != NULL) { 1729 pathbuf_destroy(nd.ni_pathbuf); 1730 nd.ni_pathbuf = NULL; 1731 } 1732 goto out; 1733 } 1734 va.va_type = vtyp; 1735 if (vtyp == VSOCK) { 1736 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1737 error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1738 } else { 1739 if (va.va_type != VFIFO && 1740 (error = kauth_authorize_system(cred, 1741 KAUTH_SYSTEM_MKNOD, 0, NULL, NULL, NULL))) { 1742 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1743 vput(nd.ni_dvp); 1744 goto out; 1745 } 1746 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1747 error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1748 if (error) 1749 goto out; 1750 } 1751 if (!error) { 1752 vn_lock(nd.ni_vp, LK_EXCLUSIVE | LK_RETRY); 1753 } 1754 out: 1755 vp = nd.ni_vp; 1756 if (!error) { 1757 error = nfsrv_composefh(vp, &nsfh, true); 1758 if (!error) 1759 error = VOP_GETATTR(vp, &va, cred); 1760 vput(vp); 1761 } 1762 if (nd.ni_dvp == nd.ni_vp) 1763 vrele(nd.ni_dvp); 1764 else 1765 vput(nd.ni_dvp); 1766 if (dirp) { 1767 vn_lock(dirp, LK_SHARED | LK_RETRY); 1768 diraft_ret = VOP_GETATTR(dirp, &diraft, cred); 1769 VOP_UNLOCK(dirp); 1770 vrele(dirp); 1771 dirp = NULL; 1772 } 1773 if (nd.ni_pathbuf != NULL) { 1774 pathbuf_destroy(nd.ni_pathbuf); 1775 nd.ni_pathbuf = NULL; 1776 } 1777 abort = 0; 1778 nfsm_reply(NFSX_SRVFH(&nsfh, true) + NFSX_POSTOPATTR(1) + 1779 NFSX_WCCDATA(1)); 1780 if (!error) { 1781 nfsm_srvpostop_fh(&nsfh); 1782 nfsm_srvpostop_attr(0, &va); 1783 } 1784 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1785 return (0); 1786 nfsmout: 1787 if (abort) { 1788 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1789 if (nd.ni_dvp == nd.ni_vp) 1790 vrele(nd.ni_dvp); 1791 else 1792 vput(nd.ni_dvp); 1793 if (nd.ni_vp) 1794 vput(nd.ni_vp); 1795 } 1796 if (nd.ni_pathbuf != NULL) { 1797 pathbuf_destroy(nd.ni_pathbuf); 1798 nd.ni_pathbuf = NULL; 1799 } 1800 if (dirp) 1801 vrele(dirp); 1802 return (error); 1803 } 1804 1805 /* 1806 * nfs remove service 1807 */ 1808 int 1809 nfsrv_remove(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 1810 { 1811 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1812 struct mbuf *nam = nfsd->nd_nam; 1813 char *dpos = nfsd->nd_dpos; 1814 kauth_cred_t cred = nfsd->nd_cr; 1815 struct nameidata nd; 1816 u_int32_t *tl; 1817 int32_t t1; 1818 char *bpos; 1819 int error = 0, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 1820 int v3 = (nfsd->nd_flag & ND_NFSV3); 1821 char *cp2; 1822 struct mbuf *mb, *mreq __unused; 1823 struct vnode *vp, *dirp; 1824 struct vattr dirfor, diraft; 1825 nfsrvfh_t nsfh; 1826 u_quad_t frev; 1827 1828 #ifndef nolint 1829 vp = (struct vnode *)0; 1830 #endif 1831 nfsm_srvmtofh(&nsfh); 1832 nfsm_srvnamesiz(len); 1833 nd.ni_cnd.cn_cred = cred; 1834 nd.ni_cnd.cn_nameiop = DELETE; 1835 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 1836 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 1837 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 1838 if (error == 0 && dirp && v3) { 1839 if (nd.ni_dvp == nd.ni_vp) 1840 vn_lock(dirp, LK_SHARED | LK_RETRY); 1841 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); 1842 if (nd.ni_dvp == nd.ni_vp) 1843 VOP_UNLOCK(dirp); 1844 } 1845 if (!error) { 1846 vp = nd.ni_vp; 1847 if (vp->v_type == VDIR) { 1848 error = EPERM; 1849 goto out; 1850 } 1851 /* 1852 * The root of a mounted filesystem cannot be deleted. 1853 */ 1854 if (vp->v_vflag & VV_ROOT) { 1855 error = EBUSY; 1856 } 1857 out: 1858 if (!error) { 1859 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1860 nqsrv_getl(vp, ND_WRITE); 1861 error = VOP_REMOVE(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); 1862 } else { 1863 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1864 if (nd.ni_dvp == vp) 1865 vrele(nd.ni_dvp); 1866 else 1867 vput(nd.ni_dvp); 1868 vput(vp); 1869 } 1870 } 1871 if (nd.ni_pathbuf != NULL) { 1872 pathbuf_destroy(nd.ni_pathbuf); 1873 nd.ni_pathbuf = NULL; 1874 } 1875 if (dirp) { 1876 if (v3) { 1877 vn_lock(dirp, LK_SHARED | LK_RETRY); 1878 diraft_ret = VOP_GETATTR(dirp, &diraft, cred); 1879 VOP_UNLOCK(dirp); 1880 } 1881 vrele(dirp); 1882 } 1883 nfsm_reply(NFSX_WCCDATA(v3)); 1884 if (v3) { 1885 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1886 return (0); 1887 } 1888 nfsm_srvdone; 1889 } 1890 1891 /* 1892 * nfs rename service 1893 */ 1894 int 1895 nfsrv_rename(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 1896 { 1897 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1898 struct mbuf *nam = nfsd->nd_nam; 1899 char *dpos = nfsd->nd_dpos; 1900 kauth_cred_t cred = nfsd->nd_cr; 1901 u_int32_t *tl; 1902 int32_t t1; 1903 char *bpos; 1904 int error = 0, cache = 0, fdirfor_ret = 1, fdiraft_ret = 1; 1905 uint32_t len, len2; 1906 int tdirfor_ret = 1, tdiraft_ret = 1; 1907 int v3 = (nfsd->nd_flag & ND_NFSV3); 1908 char *cp2; 1909 struct mbuf *mb, *mreq __unused; 1910 struct nameidata fromnd, tond; 1911 struct vnode *fvp, *tvp, *tdvp; 1912 struct vnode *fdirp = NULL, *tdirp = NULL; 1913 struct mount *localfs = NULL; 1914 struct vattr fdirfor, fdiraft, tdirfor, tdiraft; 1915 nfsrvfh_t fnsfh, tnsfh; 1916 u_quad_t frev; 1917 uid_t saved_uid; 1918 1919 #ifndef nolint 1920 fvp = (struct vnode *)0; 1921 #endif 1922 fromnd.ni_cnd.cn_nameiop = 0; 1923 tond.ni_cnd.cn_nameiop = 0; 1924 nfsm_srvmtofh(&fnsfh); 1925 nfsm_srvnamesiz(len); 1926 /* 1927 * Remember our original uid so that we can reset cr_uid before 1928 * the second nfs_namei() call, in case it is remapped. 1929 */ 1930 saved_uid = kauth_cred_geteuid(cred); 1931 fromnd.ni_cnd.cn_cred = cred; 1932 fromnd.ni_cnd.cn_nameiop = DELETE; 1933 fromnd.ni_cnd.cn_flags = LOCKPARENT | INRENAME; 1934 error = nfs_namei(&fromnd, &fnsfh, len, slp, nam, &md, 1935 &dpos, &fdirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 1936 if (error == 0 && fdirp && v3) { 1937 if (fromnd.ni_dvp == fromnd.ni_vp) 1938 vn_lock(fdirp, LK_SHARED | LK_RETRY); 1939 fdirfor_ret = VOP_GETATTR(fdirp, &fdirfor, cred); 1940 if (fromnd.ni_dvp == fromnd.ni_vp) 1941 VOP_UNLOCK(fdirp); 1942 } 1943 if (error) { 1944 fromnd.ni_cnd.cn_nameiop = 0; 1945 nfsm_reply(2 * NFSX_WCCDATA(v3)); 1946 nfsm_srvwcc_data(fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft); 1947 nfsm_srvwcc_data(tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft); 1948 if (fdirp) 1949 vrele(fdirp); 1950 if (fromnd.ni_pathbuf != NULL) { 1951 pathbuf_destroy(fromnd.ni_pathbuf); 1952 } 1953 return (0); 1954 } 1955 if (fromnd.ni_dvp != fromnd.ni_vp) { 1956 VOP_UNLOCK(fromnd.ni_dvp); 1957 } 1958 fvp = fromnd.ni_vp; 1959 1960 localfs = fvp->v_mount; 1961 error = VFS_RENAMELOCK_ENTER(localfs); 1962 if (error) { 1963 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 1964 vrele(fromnd.ni_dvp); 1965 vrele(fvp); 1966 goto out1; 1967 } 1968 1969 /* Copied, regrettably, from vfs_syscalls.c (q.v.) */ 1970 vrele(fvp); 1971 if ((fromnd.ni_cnd.cn_namelen == 1 && 1972 fromnd.ni_cnd.cn_nameptr[0] == '.') || 1973 (fromnd.ni_cnd.cn_namelen == 2 && 1974 fromnd.ni_cnd.cn_nameptr[0] == '.' && 1975 fromnd.ni_cnd.cn_nameptr[1] == '.')) { 1976 error = EINVAL; 1977 VFS_RENAMELOCK_EXIT(localfs); 1978 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 1979 vrele(fromnd.ni_dvp); 1980 goto out1; 1981 } 1982 vn_lock(fromnd.ni_dvp, LK_EXCLUSIVE | LK_RETRY); 1983 error = relookup(fromnd.ni_dvp, &fromnd.ni_vp, &fromnd.ni_cnd, 0); 1984 if (error) { 1985 VOP_UNLOCK(fromnd.ni_dvp); 1986 VFS_RENAMELOCK_EXIT(localfs); 1987 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 1988 vrele(fromnd.ni_dvp); 1989 goto out1; 1990 } 1991 VOP_UNLOCK(fromnd.ni_vp); 1992 if (fromnd.ni_dvp != fromnd.ni_vp) 1993 VOP_UNLOCK(fromnd.ni_dvp); 1994 fvp = fromnd.ni_vp; 1995 1996 nfsm_srvmtofh(&tnsfh); 1997 if (v3) { 1998 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 1999 len2 = fxdr_unsigned(uint32_t, *tl); 2000 /* len2 will be checked by nfs_namei */ 2001 } 2002 else { 2003 /* NFSv2 */ 2004 nfsm_strsiz(len2, NFS_MAXNAMLEN); 2005 } 2006 kauth_cred_seteuid(cred, saved_uid); 2007 tond.ni_cnd.cn_cred = cred; 2008 tond.ni_cnd.cn_nameiop = RENAME; 2009 tond.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF | NOCACHE | INRENAME; 2010 error = nfs_namei(&tond, &tnsfh, len2, slp, nam, &md, 2011 &dpos, &tdirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 2012 if (tdirp && v3) { 2013 tdirfor_ret = VOP_GETATTR(tdirp, &tdirfor, cred); 2014 } 2015 if (error) { 2016 VFS_RENAMELOCK_EXIT(localfs); 2017 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 2018 vrele(fromnd.ni_dvp); 2019 vrele(fvp); 2020 goto out1; 2021 } 2022 tdvp = tond.ni_dvp; 2023 tvp = tond.ni_vp; 2024 if (tvp != NULL) { 2025 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 2026 if (v3) 2027 error = EEXIST; 2028 else 2029 error = EISDIR; 2030 goto out; 2031 } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 2032 if (v3) 2033 error = EEXIST; 2034 else 2035 error = ENOTDIR; 2036 goto out; 2037 } 2038 if (tvp->v_type == VDIR && tvp->v_mountedhere) { 2039 if (v3) 2040 error = EXDEV; 2041 else 2042 error = ENOTEMPTY; 2043 goto out; 2044 } 2045 } 2046 if (fvp->v_type == VDIR && fvp->v_mountedhere) { 2047 if (v3) 2048 error = EXDEV; 2049 else 2050 error = ENOTEMPTY; 2051 goto out; 2052 } 2053 if (fvp->v_mount != tdvp->v_mount) { 2054 if (v3) 2055 error = EXDEV; 2056 else 2057 error = ENOTEMPTY; 2058 goto out; 2059 } 2060 if (fvp == tdvp) { 2061 if (v3) 2062 error = EINVAL; 2063 else 2064 error = ENOTEMPTY; 2065 } 2066 /* 2067 * If source is the same as the destination (that is the 2068 * same vnode with the same name in the same directory), 2069 * then there is nothing to do. 2070 */ 2071 if (fvp == tvp && fromnd.ni_dvp == tdvp && 2072 fromnd.ni_cnd.cn_namelen == tond.ni_cnd.cn_namelen && 2073 !memcmp(fromnd.ni_cnd.cn_nameptr, tond.ni_cnd.cn_nameptr, 2074 fromnd.ni_cnd.cn_namelen)) 2075 error = -1; 2076 out: 2077 if (!error) { 2078 nqsrv_getl(fromnd.ni_dvp, ND_WRITE); 2079 nqsrv_getl(tdvp, ND_WRITE); 2080 if (tvp) { 2081 nqsrv_getl(tvp, ND_WRITE); 2082 } 2083 error = VOP_RENAME(fromnd.ni_dvp, fromnd.ni_vp, &fromnd.ni_cnd, 2084 tond.ni_dvp, tond.ni_vp, &tond.ni_cnd); 2085 VFS_RENAMELOCK_EXIT(localfs); 2086 } else { 2087 VOP_ABORTOP(tond.ni_dvp, &tond.ni_cnd); 2088 if (tdvp == tvp) 2089 vrele(tdvp); 2090 else 2091 vput(tdvp); 2092 if (tvp) 2093 vput(tvp); 2094 VFS_RENAMELOCK_EXIT(localfs); 2095 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 2096 vrele(fromnd.ni_dvp); 2097 vrele(fvp); 2098 if (error == -1) 2099 error = 0; 2100 } 2101 if (tond.ni_pathbuf != NULL) { 2102 pathbuf_destroy(tond.ni_pathbuf); 2103 tond.ni_pathbuf = NULL; 2104 } 2105 tond.ni_cnd.cn_nameiop = 0; 2106 out1: 2107 if (fdirp) { 2108 if (v3) { 2109 vn_lock(fdirp, LK_SHARED | LK_RETRY); 2110 fdiraft_ret = VOP_GETATTR(fdirp, &fdiraft, cred); 2111 VOP_UNLOCK(fdirp); 2112 } 2113 vrele(fdirp); 2114 fdirp = NULL; 2115 } 2116 if (tdirp) { 2117 if (v3) { 2118 vn_lock(tdirp, LK_SHARED | LK_RETRY); 2119 tdiraft_ret = VOP_GETATTR(tdirp, &tdiraft, cred); 2120 VOP_UNLOCK(tdirp); 2121 } 2122 vrele(tdirp); 2123 tdirp = NULL; 2124 } 2125 pathbuf_destroy(fromnd.ni_pathbuf); 2126 fromnd.ni_pathbuf = NULL; 2127 fromnd.ni_cnd.cn_nameiop = 0; 2128 localfs = NULL; 2129 nfsm_reply(2 * NFSX_WCCDATA(v3)); 2130 if (v3) { 2131 nfsm_srvwcc_data(fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft); 2132 nfsm_srvwcc_data(tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft); 2133 } 2134 return (0); 2135 2136 nfsmout: 2137 if (fdirp) 2138 vrele(fdirp); 2139 #ifdef notdef 2140 if (tdirp) 2141 vrele(tdirp); 2142 #endif 2143 if (tond.ni_cnd.cn_nameiop) { 2144 if (tond.ni_pathbuf != NULL) { 2145 pathbuf_destroy(tond.ni_pathbuf); 2146 tond.ni_pathbuf = NULL; 2147 } 2148 } 2149 if (localfs) { 2150 VFS_RENAMELOCK_EXIT(localfs); 2151 } 2152 if (fromnd.ni_cnd.cn_nameiop) { 2153 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 2154 if (fromnd.ni_pathbuf != NULL) { 2155 pathbuf_destroy(fromnd.ni_pathbuf); 2156 fromnd.ni_pathbuf = NULL; 2157 } 2158 vrele(fromnd.ni_dvp); 2159 vrele(fvp); 2160 } 2161 return (error); 2162 } 2163 2164 /* 2165 * nfs link service 2166 */ 2167 int 2168 nfsrv_link(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 2169 { 2170 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2171 struct mbuf *nam = nfsd->nd_nam; 2172 char *dpos = nfsd->nd_dpos; 2173 kauth_cred_t cred = nfsd->nd_cr; 2174 struct nameidata nd; 2175 u_int32_t *tl; 2176 int32_t t1; 2177 char *bpos; 2178 int error = 0, rdonly, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 2179 int getret = 1, v3 = (nfsd->nd_flag & ND_NFSV3); 2180 char *cp2; 2181 struct mbuf *mb, *mreq __unused; 2182 struct vnode *vp, *xp, *dirp = (struct vnode *)0; 2183 struct vattr dirfor, diraft, at; 2184 nfsrvfh_t nsfh, dnsfh; 2185 u_quad_t frev; 2186 2187 nfsm_srvmtofh(&nsfh); 2188 nfsm_srvmtofh(&dnsfh); 2189 nfsm_srvnamesiz(len); 2190 error = nfsrv_fhtovp(&nsfh, false, &vp, cred, slp, nam, 2191 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 2192 if (error) { 2193 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2194 nfsm_srvpostop_attr(getret, &at); 2195 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2196 return (0); 2197 } 2198 if (vp->v_type == VDIR) { 2199 error = EPERM; 2200 goto out1; 2201 } 2202 nd.ni_cnd.cn_cred = cred; 2203 nd.ni_cnd.cn_nameiop = CREATE; 2204 nd.ni_cnd.cn_flags = LOCKPARENT; 2205 error = nfs_namei(&nd, &dnsfh, len, slp, nam, &md, &dpos, 2206 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 2207 if (dirp && v3) { 2208 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); 2209 } 2210 if (error) 2211 goto out1; 2212 xp = nd.ni_vp; 2213 if (xp != NULL) { 2214 error = EEXIST; 2215 goto out; 2216 } 2217 xp = nd.ni_dvp; 2218 if (vp->v_mount != xp->v_mount) 2219 error = EXDEV; 2220 out: 2221 if (!error) { 2222 nqsrv_getl(vp, ND_WRITE); 2223 nqsrv_getl(xp, ND_WRITE); 2224 error = VOP_LINK(nd.ni_dvp, vp, &nd.ni_cnd); 2225 if (nd.ni_dvp != nd.ni_vp) 2226 VOP_UNLOCK(nd.ni_dvp); 2227 vrele(nd.ni_dvp); 2228 } else { 2229 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2230 if (nd.ni_dvp == nd.ni_vp) 2231 vrele(nd.ni_dvp); 2232 else 2233 vput(nd.ni_dvp); 2234 if (nd.ni_vp) 2235 vrele(nd.ni_vp); 2236 } 2237 out1: 2238 if (v3) { 2239 vn_lock(vp, LK_SHARED | LK_RETRY); 2240 getret = VOP_GETATTR(vp, &at, cred); 2241 VOP_UNLOCK(vp); 2242 } 2243 if (dirp) { 2244 if (v3) { 2245 vn_lock(dirp, LK_SHARED | LK_RETRY); 2246 diraft_ret = VOP_GETATTR(dirp, &diraft, cred); 2247 VOP_UNLOCK(dirp); 2248 } 2249 vrele(dirp); 2250 } 2251 vrele(vp); 2252 if (nd.ni_pathbuf != NULL) { 2253 pathbuf_destroy(nd.ni_pathbuf); 2254 nd.ni_pathbuf = NULL; 2255 } 2256 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2257 if (v3) { 2258 nfsm_srvpostop_attr(getret, &at); 2259 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2260 return (0); 2261 } 2262 nfsm_srvdone; 2263 } 2264 2265 /* 2266 * nfs symbolic link service 2267 */ 2268 int 2269 nfsrv_symlink(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 2270 { 2271 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2272 struct mbuf *nam = nfsd->nd_nam; 2273 char *dpos = nfsd->nd_dpos; 2274 kauth_cred_t cred = nfsd->nd_cr; 2275 struct vattr va, dirfor, diraft; 2276 struct nameidata nd; 2277 u_int32_t *tl; 2278 int32_t t1; 2279 struct nfsv2_sattr *sp; 2280 char *bpos, *pathcp = NULL, *cp2; 2281 struct uio io; 2282 struct iovec iv; 2283 int error = 0, cache = 0, dirfor_ret = 1, diraft_ret = 1, abort = 0; 2284 uint32_t len, len2; 2285 int v3 = (nfsd->nd_flag & ND_NFSV3); 2286 struct mbuf *mb, *mreq __unused; 2287 struct vnode *dirp = (struct vnode *)0; 2288 nfsrvfh_t nsfh; 2289 u_quad_t frev; 2290 2291 nd.ni_cnd.cn_nameiop = 0; 2292 nfsm_srvmtofh(&nsfh); 2293 nfsm_srvnamesiz(len); 2294 nd.ni_cnd.cn_cred = cred; 2295 nd.ni_cnd.cn_nameiop = CREATE; 2296 nd.ni_cnd.cn_flags = LOCKPARENT; 2297 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 2298 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 2299 if (dirp && v3) { 2300 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); 2301 } 2302 if (error) 2303 goto out; 2304 abort = 1; 2305 vattr_null(&va); 2306 va.va_type = VLNK; 2307 if (v3) { 2308 va.va_mode = 0; 2309 nfsm_srvsattr(&va); 2310 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 2311 len2 = fxdr_unsigned(uint32_t, *tl); 2312 if (len2 > PATH_MAX) { 2313 /* XXX should check _PC_NO_TRUNC */ 2314 error = ENAMETOOLONG; 2315 goto abortop; 2316 } 2317 } 2318 else { 2319 /* NFSv2 */ 2320 nfsm_strsiz(len2, NFS_MAXPATHLEN); 2321 } 2322 pathcp = malloc(len2 + 1, M_TEMP, M_WAITOK); 2323 iv.iov_base = pathcp; 2324 iv.iov_len = len2; 2325 io.uio_resid = len2; 2326 io.uio_offset = 0; 2327 io.uio_iov = &iv; 2328 io.uio_iovcnt = 1; 2329 io.uio_rw = UIO_READ; 2330 UIO_SETUP_SYSSPACE(&io); 2331 nfsm_mtouio(&io, len2); 2332 if (!v3) { 2333 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2334 va.va_mode = fxdr_unsigned(u_int16_t, sp->sa_mode); 2335 } 2336 *(pathcp + len2) = '\0'; 2337 if (nd.ni_vp) { 2338 error = EEXIST; 2339 abortop: 2340 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2341 if (nd.ni_dvp == nd.ni_vp) 2342 vrele(nd.ni_dvp); 2343 else 2344 vput(nd.ni_dvp); 2345 if (nd.ni_vp) 2346 vrele(nd.ni_vp); 2347 goto out; 2348 } 2349 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2350 error = VOP_SYMLINK(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va, pathcp); 2351 if (!error) { 2352 if (v3) { 2353 vn_lock(nd.ni_vp, LK_SHARED | LK_RETRY); 2354 error = nfsrv_composefh(nd.ni_vp, &nsfh, v3); 2355 if (!error) 2356 error = VOP_GETATTR(nd.ni_vp, &va, cred); 2357 vput(nd.ni_vp); 2358 } else { 2359 vrele(nd.ni_vp); 2360 } 2361 } 2362 vput(nd.ni_dvp); 2363 out: 2364 if (pathcp) 2365 free(pathcp, M_TEMP); 2366 if (dirp) { 2367 if (v3) { 2368 vn_lock(dirp, LK_SHARED | LK_RETRY); 2369 diraft_ret = VOP_GETATTR(dirp, &diraft, cred); 2370 VOP_UNLOCK(dirp); 2371 } 2372 vrele(dirp); 2373 dirp = NULL; 2374 } 2375 if (nd.ni_pathbuf != NULL) { 2376 pathbuf_destroy(nd.ni_pathbuf); 2377 nd.ni_pathbuf = NULL; 2378 } 2379 abort = 0; 2380 nfsm_reply(NFSX_SRVFH(&nsfh, v3) + NFSX_POSTOPATTR(v3) + 2381 NFSX_WCCDATA(v3)); 2382 if (v3) { 2383 if (!error) { 2384 nfsm_srvpostop_fh(&nsfh); 2385 nfsm_srvpostop_attr(0, &va); 2386 } 2387 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2388 } 2389 return (0); 2390 nfsmout: 2391 if (abort) { 2392 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2393 if (nd.ni_dvp == nd.ni_vp) 2394 vrele(nd.ni_dvp); 2395 else 2396 vput(nd.ni_dvp); 2397 if (nd.ni_vp) 2398 vrele(nd.ni_vp); 2399 if (nd.ni_pathbuf != NULL) { 2400 pathbuf_destroy(nd.ni_pathbuf); 2401 nd.ni_pathbuf = NULL; 2402 } 2403 } 2404 if (dirp) 2405 vrele(dirp); 2406 if (pathcp) 2407 free(pathcp, M_TEMP); 2408 return (error); 2409 } 2410 2411 /* 2412 * nfs mkdir service 2413 */ 2414 int 2415 nfsrv_mkdir(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 2416 { 2417 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2418 struct mbuf *nam = nfsd->nd_nam; 2419 char *dpos = nfsd->nd_dpos; 2420 kauth_cred_t cred = nfsd->nd_cr; 2421 struct vattr va, dirfor, diraft; 2422 struct nfs_fattr *fp; 2423 struct nameidata nd; 2424 char *cp; 2425 u_int32_t *tl; 2426 int32_t t1; 2427 char *bpos; 2428 int error = 0, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 2429 int abort = 0; 2430 int v3 = (nfsd->nd_flag & ND_NFSV3); 2431 char *cp2; 2432 struct mbuf *mb, *mreq __unused; 2433 struct vnode *vp, *dirp = (struct vnode *)0; 2434 nfsrvfh_t nsfh; 2435 u_quad_t frev; 2436 2437 nfsm_srvmtofh(&nsfh); 2438 nfsm_srvnamesiz(len); 2439 nd.ni_cnd.cn_cred = cred; 2440 nd.ni_cnd.cn_nameiop = CREATE; 2441 nd.ni_cnd.cn_flags = LOCKPARENT; 2442 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 2443 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 2444 if (dirp && v3) { 2445 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); 2446 } 2447 if (error) { 2448 if (nd.ni_pathbuf != NULL) { 2449 pathbuf_destroy(nd.ni_pathbuf); 2450 nd.ni_pathbuf = NULL; 2451 } 2452 nfsm_reply(NFSX_WCCDATA(v3)); 2453 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2454 if (dirp) 2455 vrele(dirp); 2456 return (0); 2457 } 2458 abort = 1; 2459 vattr_null(&va); 2460 if (v3) { 2461 va.va_mode = 0; 2462 nfsm_srvsattr(&va); 2463 } else { 2464 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2465 va.va_mode = nfstov_mode(*tl++); 2466 } 2467 va.va_type = VDIR; 2468 vp = nd.ni_vp; 2469 if (vp != NULL) { 2470 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2471 if (nd.ni_dvp == vp) 2472 vrele(nd.ni_dvp); 2473 else 2474 vput(nd.ni_dvp); 2475 vrele(vp); 2476 error = EEXIST; 2477 goto out; 2478 } 2479 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2480 error = VOP_MKDIR(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 2481 if (!error) { 2482 vp = nd.ni_vp; 2483 vn_lock(vp, LK_SHARED | LK_RETRY); 2484 error = nfsrv_composefh(vp, &nsfh, v3); 2485 if (!error) 2486 error = VOP_GETATTR(vp, &va, cred); 2487 vput(vp); 2488 } 2489 vput(nd.ni_dvp); 2490 out: 2491 if (dirp) { 2492 if (v3) { 2493 vn_lock(dirp, LK_SHARED | LK_RETRY); 2494 diraft_ret = VOP_GETATTR(dirp, &diraft, cred); 2495 VOP_UNLOCK(dirp); 2496 } 2497 vrele(dirp); 2498 dirp = NULL; 2499 } 2500 if (nd.ni_pathbuf != NULL) { 2501 pathbuf_destroy(nd.ni_pathbuf); 2502 nd.ni_pathbuf = NULL; 2503 } 2504 abort = 0; 2505 nfsm_reply(NFSX_SRVFH(&nsfh, v3) + NFSX_POSTOPATTR(v3) + 2506 NFSX_WCCDATA(v3)); 2507 if (v3) { 2508 if (!error) { 2509 nfsm_srvpostop_fh(&nsfh); 2510 nfsm_srvpostop_attr(0, &va); 2511 } 2512 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2513 } else { 2514 nfsm_srvfhtom(&nsfh, v3); 2515 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 2516 nfsm_srvfillattr(&va, fp); 2517 } 2518 return (0); 2519 nfsmout: 2520 if (abort) { 2521 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2522 if (nd.ni_dvp == nd.ni_vp) 2523 vrele(nd.ni_dvp); 2524 else 2525 vput(nd.ni_dvp); 2526 if (nd.ni_vp) 2527 vrele(nd.ni_vp); 2528 if (nd.ni_pathbuf != NULL) { 2529 pathbuf_destroy(nd.ni_pathbuf); 2530 nd.ni_pathbuf = NULL; 2531 } 2532 } 2533 if (dirp) 2534 vrele(dirp); 2535 return (error); 2536 } 2537 2538 /* 2539 * nfs rmdir service 2540 */ 2541 int 2542 nfsrv_rmdir(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 2543 { 2544 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2545 struct mbuf *nam = nfsd->nd_nam; 2546 char *dpos = nfsd->nd_dpos; 2547 kauth_cred_t cred = nfsd->nd_cr; 2548 u_int32_t *tl; 2549 int32_t t1; 2550 char *bpos; 2551 int error = 0, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 2552 int v3 = (nfsd->nd_flag & ND_NFSV3); 2553 char *cp2; 2554 struct mbuf *mb, *mreq __unused; 2555 struct vnode *vp, *dirp = (struct vnode *)0; 2556 struct vattr dirfor, diraft; 2557 nfsrvfh_t nsfh; 2558 struct nameidata nd; 2559 u_quad_t frev; 2560 2561 nfsm_srvmtofh(&nsfh); 2562 nfsm_srvnamesiz(len); 2563 nd.ni_cnd.cn_cred = cred; 2564 nd.ni_cnd.cn_nameiop = DELETE; 2565 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 2566 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 2567 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 2568 if (dirp && v3) { 2569 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); 2570 } 2571 if (error) { 2572 if (nd.ni_pathbuf != NULL) { 2573 pathbuf_destroy(nd.ni_pathbuf); 2574 nd.ni_pathbuf = NULL; 2575 } 2576 nfsm_reply(NFSX_WCCDATA(v3)); 2577 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2578 if (dirp) 2579 vrele(dirp); 2580 return (0); 2581 } 2582 vp = nd.ni_vp; 2583 if (vp->v_type != VDIR) { 2584 error = ENOTDIR; 2585 goto out; 2586 } 2587 /* 2588 * No rmdir "." please. 2589 */ 2590 if (nd.ni_dvp == vp) { 2591 error = EINVAL; 2592 goto out; 2593 } 2594 /* 2595 * The root of a mounted filesystem cannot be deleted. 2596 */ 2597 if (vp->v_vflag & VV_ROOT) 2598 error = EBUSY; 2599 out: 2600 if (!error) { 2601 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2602 nqsrv_getl(vp, ND_WRITE); 2603 error = VOP_RMDIR(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); 2604 } else { 2605 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2606 if (nd.ni_dvp == nd.ni_vp) 2607 vrele(nd.ni_dvp); 2608 else 2609 vput(nd.ni_dvp); 2610 vput(vp); 2611 } 2612 if (nd.ni_pathbuf != NULL) { 2613 pathbuf_destroy(nd.ni_pathbuf); 2614 nd.ni_pathbuf = NULL; 2615 } 2616 if (dirp) { 2617 if (v3) { 2618 vn_lock(dirp, LK_SHARED | LK_RETRY); 2619 diraft_ret = VOP_GETATTR(dirp, &diraft, cred); 2620 VOP_UNLOCK(dirp); 2621 } 2622 vrele(dirp); 2623 } 2624 nfsm_reply(NFSX_WCCDATA(v3)); 2625 if (v3) { 2626 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2627 return (0); 2628 } 2629 nfsm_srvdone; 2630 } 2631 2632 /* 2633 * nfs readdir service 2634 * - mallocs what it thinks is enough to read 2635 * count rounded up to a multiple of NFS_SRVDIRBLKSIZ <= NFS_MAXREADDIR 2636 * - calls VOP_READDIR() 2637 * - loops around building the reply 2638 * if the output generated exceeds count break out of loop 2639 * The nfsm_clget macro is used here so that the reply will be packed 2640 * tightly in mbuf clusters. 2641 * - it only knows that it has encountered eof when the VOP_READDIR() 2642 * reads nothing 2643 * - as such one readdir rpc will return eof false although you are there 2644 * and then the next will return eof 2645 * - it trims out records with d_fileno == 0 2646 * this doesn't matter for Unix clients, but they might confuse clients 2647 * for other os'. 2648 * - it trims out records with d_type == DT_WHT 2649 * these cannot be seen through NFS (unless we extend the protocol) 2650 * NB: It is tempting to set eof to true if the VOP_READDIR() reads less 2651 * than requested, but this may not apply to all filesystems. For 2652 * example, client NFS does not { although it is never remote mounted 2653 * anyhow } 2654 * The alternate call nfsrv_readdirplus() does lookups as well. 2655 * PS: The NFS protocol spec. does not clarify what the "count" byte 2656 * argument is a count of.. just name strings and file id's or the 2657 * entire reply rpc or ... 2658 * I tried just file name and id sizes and it confused the Sun client, 2659 * so I am using the full rpc size now. The "paranoia.." comment refers 2660 * to including the status longwords that are not a part of the dir. 2661 * "entry" structures, but are in the rpc. 2662 */ 2663 2664 #define NFS_SRVDIRBLKSIZ 1024 2665 2666 struct flrep { 2667 nfsuint64 fl_off; 2668 u_int32_t fl_postopok; 2669 struct nfs_fattr fl_fattr; /* XXX: must be of fattr3 size */ 2670 u_int32_t fl_fhok; 2671 u_int32_t fl_fhsize; 2672 /* handle comes here, filled in dynamically */ 2673 }; 2674 2675 int 2676 nfsrv_readdir(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 2677 { 2678 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2679 struct mbuf *nam = nfsd->nd_nam; 2680 char *dpos = nfsd->nd_dpos; 2681 kauth_cred_t cred = nfsd->nd_cr; 2682 char *bp, *be; 2683 struct mbuf *mp; 2684 struct dirent *dp; 2685 char *cp; 2686 u_int32_t *tl; 2687 int32_t t1; 2688 char *bpos; 2689 struct mbuf *mb, *mreq __unused, *mp2; 2690 char *cpos, *cend, *cp2, *rbuf; 2691 struct vnode *vp; 2692 struct vattr at; 2693 nfsrvfh_t nsfh; 2694 struct uio io; 2695 struct iovec iv; 2696 int len, nlen, rem, xfer, tsiz, i, error = 0, getret = 1; 2697 int siz, cnt, fullsiz, eofflag, rdonly, cache = 0, ncookies; 2698 int v3 = (nfsd->nd_flag & ND_NFSV3); 2699 u_quad_t frev, off, toff; 2700 #ifdef NFS3_STRICTVERF 2701 u_quad_t verf; 2702 #endif 2703 off_t *cookies = NULL, *cookiep; 2704 nfsuint64 jar; 2705 2706 nfsm_srvmtofh(&nsfh); 2707 if (v3) { 2708 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 2709 toff = fxdr_hyper(tl); 2710 tl += 2; 2711 #ifdef NFS3_STRICTVERF 2712 verf = fxdr_hyper(tl); 2713 #endif 2714 tl += 2; 2715 } else { 2716 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2717 toff = fxdr_unsigned(u_quad_t, *tl++); 2718 } 2719 off = toff; 2720 cnt = fxdr_unsigned(int, *tl); 2721 siz = ((cnt + NFS_SRVDIRBLKSIZ - 1) & ~(NFS_SRVDIRBLKSIZ - 1)); 2722 xfer = NFS_SRVMAXDATA(nfsd); 2723 if (siz > xfer) 2724 siz = xfer; 2725 fullsiz = siz; 2726 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 2727 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 2728 if (!error && vp->v_type != VDIR) { 2729 error = ENOTDIR; 2730 vput(vp); 2731 } 2732 if (error) { 2733 nfsm_reply(NFSX_UNSIGNED); 2734 nfsm_srvpostop_attr(getret, &at); 2735 return (0); 2736 } 2737 nqsrv_getl(vp, ND_READ); 2738 if (v3) { 2739 error = getret = VOP_GETATTR(vp, &at, cred); 2740 #ifdef NFS3_STRICTVERF 2741 /* 2742 * XXX This check is too strict for Solaris 2.5 clients. 2743 */ 2744 if (!error && toff && verf != at.va_filerev) 2745 error = NFSERR_BAD_COOKIE; 2746 #endif 2747 } 2748 if (!error) 2749 error = nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 0); 2750 if (error) { 2751 vput(vp); 2752 nfsm_reply(NFSX_POSTOPATTR(v3)); 2753 nfsm_srvpostop_attr(getret, &at); 2754 return (0); 2755 } 2756 VOP_UNLOCK(vp); 2757 rbuf = malloc(siz, M_TEMP, M_WAITOK); 2758 again: 2759 iv.iov_base = rbuf; 2760 iv.iov_len = fullsiz; 2761 io.uio_iov = &iv; 2762 io.uio_iovcnt = 1; 2763 io.uio_offset = (off_t)off; 2764 io.uio_resid = fullsiz; 2765 io.uio_rw = UIO_READ; 2766 UIO_SETUP_SYSSPACE(&io); 2767 eofflag = 0; 2768 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2769 2770 error = VOP_READDIR(vp, &io, cred, &eofflag, &cookies, &ncookies); 2771 2772 off = (off_t)io.uio_offset; 2773 if (!cookies && !error) 2774 error = NFSERR_PERM; 2775 if (v3) { 2776 getret = VOP_GETATTR(vp, &at, cred); 2777 if (!error) 2778 error = getret; 2779 } 2780 2781 VOP_UNLOCK(vp); 2782 if (error) { 2783 vrele(vp); 2784 free((void *)rbuf, M_TEMP); 2785 if (cookies) 2786 free((void *)cookies, M_TEMP); 2787 nfsm_reply(NFSX_POSTOPATTR(v3)); 2788 nfsm_srvpostop_attr(getret, &at); 2789 return (0); 2790 } 2791 if (io.uio_resid) { 2792 siz -= io.uio_resid; 2793 2794 /* 2795 * If nothing read, return eof 2796 * rpc reply 2797 */ 2798 if (siz == 0) { 2799 vrele(vp); 2800 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_COOKIEVERF(v3) + 2801 2 * NFSX_UNSIGNED); 2802 if (v3) { 2803 nfsm_srvpostop_attr(getret, &at); 2804 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 2805 txdr_hyper(at.va_filerev, tl); 2806 tl += 2; 2807 } else 2808 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2809 *tl++ = nfs_false; 2810 *tl = nfs_true; 2811 free((void *)rbuf, M_TEMP); 2812 free((void *)cookies, M_TEMP); 2813 return (0); 2814 } 2815 } 2816 2817 /* 2818 * Check for degenerate cases of nothing useful read. 2819 * If so go try again 2820 */ 2821 cpos = rbuf; 2822 cend = rbuf + siz; 2823 dp = (struct dirent *)cpos; 2824 cookiep = cookies; 2825 2826 while (cpos < cend && ncookies > 0 && 2827 (dp->d_fileno == 0 || dp->d_type == DT_WHT)) { 2828 cpos += dp->d_reclen; 2829 dp = (struct dirent *)cpos; 2830 cookiep++; 2831 ncookies--; 2832 } 2833 if (cpos >= cend || ncookies == 0) { 2834 toff = off; 2835 siz = fullsiz; 2836 free(cookies, M_TEMP); 2837 cookies = NULL; 2838 goto again; 2839 } 2840 2841 len = 3 * NFSX_UNSIGNED; /* paranoia, probably can be 0 */ 2842 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_COOKIEVERF(v3) + siz); 2843 if (v3) { 2844 nfsm_srvpostop_attr(getret, &at); 2845 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2846 txdr_hyper(at.va_filerev, tl); 2847 } 2848 mp = mp2 = mb; 2849 bp = bpos; 2850 be = bp + M_TRAILINGSPACE(mp); 2851 2852 /* Loop through the records and build reply */ 2853 while (cpos < cend && ncookies > 0) { 2854 if (dp->d_fileno != 0 && dp->d_type != DT_WHT) { 2855 nlen = dp->d_namlen; 2856 rem = nfsm_rndup(nlen)-nlen; 2857 len += (4 * NFSX_UNSIGNED + nlen + rem); 2858 if (v3) 2859 len += 2 * NFSX_UNSIGNED; 2860 if (len > cnt) { 2861 eofflag = 0; 2862 break; 2863 } 2864 /* 2865 * Build the directory record xdr from 2866 * the dirent entry. 2867 */ 2868 nfsm_clget; 2869 *tl = nfs_true; 2870 bp += NFSX_UNSIGNED; 2871 if (v3) { 2872 nfsm_clget; 2873 *tl = txdr_unsigned(dp->d_fileno >> 32); 2874 bp += NFSX_UNSIGNED; 2875 } 2876 nfsm_clget; 2877 *tl = txdr_unsigned(dp->d_fileno); 2878 bp += NFSX_UNSIGNED; 2879 nfsm_clget; 2880 *tl = txdr_unsigned(nlen); 2881 bp += NFSX_UNSIGNED; 2882 2883 /* And loop around copying the name */ 2884 xfer = nlen; 2885 cp = dp->d_name; 2886 while (xfer > 0) { 2887 nfsm_clget; 2888 if ((bp+xfer) > be) 2889 tsiz = be-bp; 2890 else 2891 tsiz = xfer; 2892 memcpy(bp, cp, tsiz); 2893 bp += tsiz; 2894 xfer -= tsiz; 2895 if (xfer > 0) 2896 cp += tsiz; 2897 } 2898 /* And null pad to an int32_t boundary */ 2899 for (i = 0; i < rem; i++) 2900 *bp++ = '\0'; 2901 nfsm_clget; 2902 2903 /* Finish off the record */ 2904 txdr_hyper(*cookiep, &jar); 2905 if (v3) { 2906 *tl = jar.nfsuquad[0]; 2907 bp += NFSX_UNSIGNED; 2908 nfsm_clget; 2909 } 2910 *tl = jar.nfsuquad[1]; 2911 bp += NFSX_UNSIGNED; 2912 } 2913 cpos += dp->d_reclen; 2914 dp = (struct dirent *)cpos; 2915 cookiep++; 2916 ncookies--; 2917 } 2918 vrele(vp); 2919 nfsm_clget; 2920 *tl = nfs_false; 2921 bp += NFSX_UNSIGNED; 2922 nfsm_clget; 2923 if (eofflag) 2924 *tl = nfs_true; 2925 else 2926 *tl = nfs_false; 2927 bp += NFSX_UNSIGNED; 2928 if (mp != mb) { 2929 if (bp < be) 2930 mp->m_len = bp - mtod(mp, char *); 2931 } else 2932 mp->m_len += bp - bpos; 2933 free((void *)rbuf, M_TEMP); 2934 free((void *)cookies, M_TEMP); 2935 nfsm_srvdone; 2936 } 2937 2938 int 2939 nfsrv_readdirplus(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 2940 { 2941 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2942 struct mbuf *nam = nfsd->nd_nam; 2943 char *dpos = nfsd->nd_dpos; 2944 kauth_cred_t cred = nfsd->nd_cr; 2945 char *bp, *be; 2946 struct mbuf *mp; 2947 struct dirent *dp; 2948 char *cp; 2949 u_int32_t *tl; 2950 int32_t t1; 2951 char *bpos; 2952 struct mbuf *mb, *mreq __unused, *mp2; 2953 char *cpos, *cend, *cp2, *rbuf; 2954 struct vnode *vp, *nvp; 2955 struct flrep fl; 2956 nfsrvfh_t nsfh; 2957 struct uio io; 2958 struct iovec iv; 2959 struct vattr va, at, *vap = &va; 2960 struct nfs_fattr *fp; 2961 int len, nlen, rem, xfer, tsiz, i, error = 0, getret = 1; 2962 int siz, cnt, fullsiz, eofflag, rdonly, cache = 0, dirlen, ncookies; 2963 u_quad_t frev, off, toff; 2964 #ifdef NFS3_STRICTVERF 2965 u_quad_t verf; 2966 #endif 2967 off_t *cookies = NULL, *cookiep; 2968 2969 nfsm_srvmtofh(&nsfh); 2970 nfsm_dissect(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 2971 toff = fxdr_hyper(tl); 2972 tl += 2; 2973 #ifdef NFS3_STRICTVERF 2974 verf = fxdr_hyper(tl); 2975 #endif 2976 tl += 2; 2977 siz = fxdr_unsigned(int, *tl++); 2978 cnt = fxdr_unsigned(int, *tl); 2979 off = toff; 2980 siz = ((siz + NFS_SRVDIRBLKSIZ - 1) & ~(NFS_SRVDIRBLKSIZ - 1)); 2981 xfer = NFS_SRVMAXDATA(nfsd); 2982 if (siz > xfer) 2983 siz = xfer; 2984 fullsiz = siz; 2985 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 2986 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 2987 if (!error && vp->v_type != VDIR) { 2988 error = ENOTDIR; 2989 vput(vp); 2990 } 2991 if (error) { 2992 nfsm_reply(NFSX_UNSIGNED); 2993 nfsm_srvpostop_attr(getret, &at); 2994 return (0); 2995 } 2996 error = getret = VOP_GETATTR(vp, &at, cred); 2997 #ifdef NFS3_STRICTVERF 2998 /* 2999 * XXX This check is too strict for Solaris 2.5 clients. 3000 */ 3001 if (!error && toff && verf != at.va_filerev) 3002 error = NFSERR_BAD_COOKIE; 3003 #endif 3004 if (!error) { 3005 nqsrv_getl(vp, ND_READ); 3006 error = nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 0); 3007 } 3008 if (error) { 3009 vput(vp); 3010 nfsm_reply(NFSX_V3POSTOPATTR); 3011 nfsm_srvpostop_attr(getret, &at); 3012 return (0); 3013 } 3014 VOP_UNLOCK(vp); 3015 3016 rbuf = malloc(siz, M_TEMP, M_WAITOK); 3017 again: 3018 iv.iov_base = rbuf; 3019 iv.iov_len = fullsiz; 3020 io.uio_iov = &iv; 3021 io.uio_iovcnt = 1; 3022 io.uio_offset = (off_t)off; 3023 io.uio_resid = fullsiz; 3024 io.uio_rw = UIO_READ; 3025 UIO_SETUP_SYSSPACE(&io); 3026 eofflag = 0; 3027 3028 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 3029 3030 error = VOP_READDIR(vp, &io, cred, &eofflag, &cookies, &ncookies); 3031 3032 off = (u_quad_t)io.uio_offset; 3033 getret = VOP_GETATTR(vp, &at, cred); 3034 3035 VOP_UNLOCK(vp); 3036 3037 /* 3038 * If the VGET operation doesn't work for this filesystem, 3039 * we can't support readdirplus. Returning NOTSUPP should 3040 * make clients fall back to plain readdir. 3041 * There's no need to check for VPTOFH as well, we wouldn't 3042 * even be here otherwise. 3043 */ 3044 if (!getret) { 3045 if ((getret = VFS_VGET(vp->v_mount, at.va_fileid, &nvp))) 3046 getret = (getret == EOPNOTSUPP) ? 3047 NFSERR_NOTSUPP : NFSERR_IO; 3048 else 3049 vput(nvp); 3050 } 3051 3052 if (!cookies && !error) 3053 error = NFSERR_PERM; 3054 if (!error) 3055 error = getret; 3056 if (error) { 3057 vrele(vp); 3058 if (cookies) 3059 free((void *)cookies, M_TEMP); 3060 free((void *)rbuf, M_TEMP); 3061 nfsm_reply(NFSX_V3POSTOPATTR); 3062 nfsm_srvpostop_attr(getret, &at); 3063 return (0); 3064 } 3065 if (io.uio_resid) { 3066 siz -= io.uio_resid; 3067 3068 /* 3069 * If nothing read, return eof 3070 * rpc reply 3071 */ 3072 if (siz == 0) { 3073 vrele(vp); 3074 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF + 3075 2 * NFSX_UNSIGNED); 3076 nfsm_srvpostop_attr(getret, &at); 3077 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 3078 txdr_hyper(at.va_filerev, tl); 3079 tl += 2; 3080 *tl++ = nfs_false; 3081 *tl = nfs_true; 3082 free((void *)cookies, M_TEMP); 3083 free((void *)rbuf, M_TEMP); 3084 return (0); 3085 } 3086 } 3087 3088 /* 3089 * Check for degenerate cases of nothing useful read. 3090 * If so go try again 3091 */ 3092 cpos = rbuf; 3093 cend = rbuf + siz; 3094 dp = (struct dirent *)cpos; 3095 cookiep = cookies; 3096 3097 while (cpos < cend && ncookies > 0 && 3098 (dp->d_fileno == 0 || dp->d_type == DT_WHT)) { 3099 cpos += dp->d_reclen; 3100 dp = (struct dirent *)cpos; 3101 cookiep++; 3102 ncookies--; 3103 } 3104 if (cpos >= cend || ncookies == 0) { 3105 toff = off; 3106 siz = fullsiz; 3107 free(cookies, M_TEMP); 3108 cookies = NULL; 3109 goto again; 3110 } 3111 3112 dirlen = len = NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF + 2 * NFSX_UNSIGNED; 3113 nfsm_reply(cnt); 3114 nfsm_srvpostop_attr(getret, &at); 3115 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 3116 txdr_hyper(at.va_filerev, tl); 3117 mp = mp2 = mb; 3118 bp = bpos; 3119 be = bp + M_TRAILINGSPACE(mp); 3120 3121 /* Loop through the records and build reply */ 3122 while (cpos < cend && ncookies > 0) { 3123 if (dp->d_fileno != 0 && dp->d_type != DT_WHT) { 3124 nfsrvfh_t nnsfh; 3125 3126 nlen = dp->d_namlen; 3127 rem = nfsm_rndup(nlen)-nlen; 3128 3129 /* 3130 * For readdir_and_lookup get the vnode using 3131 * the file number. 3132 */ 3133 if (VFS_VGET(vp->v_mount, dp->d_fileno, &nvp)) 3134 goto invalid; 3135 if (nfsrv_composefh(nvp, &nnsfh, true)) { 3136 vput(nvp); 3137 goto invalid; 3138 } 3139 if (VOP_GETATTR(nvp, vap, cred)) { 3140 vput(nvp); 3141 goto invalid; 3142 } 3143 vput(nvp); 3144 3145 /* 3146 * If either the dircount or maxcount will be 3147 * exceeded, get out now. Both of these lengths 3148 * are calculated conservatively, including all 3149 * XDR overheads. 3150 */ 3151 len += (8 * NFSX_UNSIGNED + nlen + rem + NFSX_V3FH + 3152 NFSX_V3POSTOPATTR); 3153 dirlen += (6 * NFSX_UNSIGNED + nlen + rem); 3154 if (len > cnt || dirlen > fullsiz) { 3155 eofflag = 0; 3156 break; 3157 } 3158 3159 /* 3160 * Build the directory record xdr from 3161 * the dirent entry. 3162 */ 3163 fp = (struct nfs_fattr *)&fl.fl_fattr; 3164 nfsm_srvfillattr(vap, fp); 3165 fl.fl_fhsize = txdr_unsigned(NFSX_V3FH); 3166 fl.fl_fhok = nfs_true; 3167 fl.fl_postopok = nfs_true; 3168 txdr_hyper(*cookiep, fl.fl_off.nfsuquad); 3169 3170 nfsm_clget; 3171 *tl = nfs_true; 3172 bp += NFSX_UNSIGNED; 3173 nfsm_clget; 3174 *tl = txdr_unsigned(dp->d_fileno >> 32); 3175 bp += NFSX_UNSIGNED; 3176 nfsm_clget; 3177 *tl = txdr_unsigned(dp->d_fileno); 3178 bp += NFSX_UNSIGNED; 3179 nfsm_clget; 3180 *tl = txdr_unsigned(nlen); 3181 bp += NFSX_UNSIGNED; 3182 3183 /* And loop around copying the name */ 3184 xfer = nlen; 3185 cp = dp->d_name; 3186 while (xfer > 0) { 3187 nfsm_clget; 3188 if ((bp + xfer) > be) 3189 tsiz = be - bp; 3190 else 3191 tsiz = xfer; 3192 memcpy(bp, cp, tsiz); 3193 bp += tsiz; 3194 xfer -= tsiz; 3195 if (xfer > 0) 3196 cp += tsiz; 3197 } 3198 /* And null pad to an int32_t boundary */ 3199 for (i = 0; i < rem; i++) 3200 *bp++ = '\0'; 3201 3202 /* 3203 * Now copy the flrep structure out. 3204 */ 3205 xfer = sizeof(struct flrep); 3206 cp = (void *)&fl; 3207 while (xfer > 0) { 3208 nfsm_clget; 3209 if ((bp + xfer) > be) 3210 tsiz = be - bp; 3211 else 3212 tsiz = xfer; 3213 memcpy(bp, cp, tsiz); 3214 bp += tsiz; 3215 xfer -= tsiz; 3216 if (xfer > 0) 3217 cp += tsiz; 3218 } 3219 3220 /* 3221 * ... and filehandle. 3222 */ 3223 xfer = NFSRVFH_SIZE(&nnsfh); 3224 cp = NFSRVFH_DATA(&nnsfh); 3225 while (xfer > 0) { 3226 nfsm_clget; 3227 if ((bp + xfer) > be) 3228 tsiz = be - bp; 3229 else 3230 tsiz = xfer; 3231 memcpy(bp, cp, tsiz); 3232 bp += tsiz; 3233 xfer -= tsiz; 3234 if (xfer > 0) 3235 cp += tsiz; 3236 } 3237 } 3238 invalid: 3239 cpos += dp->d_reclen; 3240 dp = (struct dirent *)cpos; 3241 cookiep++; 3242 ncookies--; 3243 } 3244 vrele(vp); 3245 nfsm_clget; 3246 *tl = nfs_false; 3247 bp += NFSX_UNSIGNED; 3248 nfsm_clget; 3249 if (eofflag) 3250 *tl = nfs_true; 3251 else 3252 *tl = nfs_false; 3253 bp += NFSX_UNSIGNED; 3254 if (mp != mb) { 3255 if (bp < be) 3256 mp->m_len = bp - mtod(mp, char *); 3257 } else 3258 mp->m_len += bp - bpos; 3259 free((void *)cookies, M_TEMP); 3260 free((void *)rbuf, M_TEMP); 3261 nfsm_srvdone; 3262 } 3263 3264 /* 3265 * nfs commit service 3266 */ 3267 int 3268 nfsrv_commit(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 3269 { 3270 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3271 struct mbuf *nam = nfsd->nd_nam; 3272 char *dpos = nfsd->nd_dpos; 3273 kauth_cred_t cred = nfsd->nd_cr; 3274 struct vattr bfor, aft; 3275 struct vnode *vp; 3276 nfsrvfh_t nsfh; 3277 u_int32_t *tl; 3278 int32_t t1; 3279 char *bpos; 3280 int error = 0, rdonly, for_ret = 1, aft_ret = 1, cache = 0; 3281 uint32_t cnt; 3282 char *cp2; 3283 struct mbuf *mb, *mreq __unused; 3284 u_quad_t frev, off, end; 3285 3286 nfsm_srvmtofh(&nsfh); 3287 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 3288 3289 off = fxdr_hyper(tl); 3290 tl += 2; 3291 cnt = fxdr_unsigned(uint32_t, *tl); 3292 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 3293 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 3294 if (error) { 3295 nfsm_reply(2 * NFSX_UNSIGNED); 3296 nfsm_srvwcc_data(for_ret, &bfor, aft_ret, &aft); 3297 return (0); 3298 } 3299 for_ret = VOP_GETATTR(vp, &bfor, cred); 3300 end = (cnt > 0) ? off + cnt : vp->v_size; 3301 if (end < off || end > vp->v_size) 3302 end = vp->v_size; 3303 if (off < vp->v_size) 3304 error = VOP_FSYNC(vp, cred, FSYNC_WAIT, off, end); 3305 /* else error == 0, from nfsrv_fhtovp() */ 3306 aft_ret = VOP_GETATTR(vp, &aft, cred); 3307 vput(vp); 3308 nfsm_reply(NFSX_V3WCCDATA + NFSX_V3WRITEVERF); 3309 nfsm_srvwcc_data(for_ret, &bfor, aft_ret, &aft); 3310 if (!error) { 3311 nfsm_build(tl, u_int32_t *, NFSX_V3WRITEVERF); 3312 *tl++ = txdr_unsigned(boottime.tv_sec); 3313 *tl = txdr_unsigned(boottime.tv_nsec / 1000); 3314 } else { 3315 return (0); 3316 } 3317 nfsm_srvdone; 3318 } 3319 3320 /* 3321 * nfs statfs service 3322 */ 3323 int 3324 nfsrv_statfs(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 3325 { 3326 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3327 struct mbuf *nam = nfsd->nd_nam; 3328 char *dpos = nfsd->nd_dpos; 3329 kauth_cred_t cred = nfsd->nd_cr; 3330 struct statvfs *sf = NULL; 3331 struct nfs_statfs *sfp; 3332 u_int32_t *tl; 3333 int32_t t1; 3334 char *bpos; 3335 int error = 0, rdonly, cache = 0, getret = 1; 3336 int v3 = (nfsd->nd_flag & ND_NFSV3); 3337 char *cp2; 3338 struct mbuf *mb, *mreq __unused; 3339 struct vnode *vp; 3340 struct vattr at; 3341 nfsrvfh_t nsfh; 3342 u_quad_t frev, tval; 3343 3344 nfsm_srvmtofh(&nsfh); 3345 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 3346 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 3347 if (error) { 3348 nfsm_reply(NFSX_UNSIGNED); 3349 nfsm_srvpostop_attr(getret, &at); 3350 return (0); 3351 } 3352 sf = malloc(sizeof(*sf), M_TEMP, M_WAITOK); 3353 error = VFS_STATVFS(vp->v_mount, sf); 3354 getret = VOP_GETATTR(vp, &at, cred); 3355 vput(vp); 3356 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_STATFS(v3)); 3357 if (v3) 3358 nfsm_srvpostop_attr(getret, &at); 3359 if (error) { 3360 free(sf, M_TEMP); 3361 return (0); 3362 } 3363 nfsm_build(sfp, struct nfs_statfs *, NFSX_STATFS(v3)); 3364 if (v3) { 3365 tval = (u_quad_t)((quad_t)sf->f_blocks * (quad_t)sf->f_frsize); 3366 txdr_hyper(tval, &sfp->sf_tbytes); 3367 tval = (u_quad_t)((quad_t)sf->f_bfree * (quad_t)sf->f_frsize); 3368 txdr_hyper(tval, &sfp->sf_fbytes); 3369 tval = (u_quad_t)((quad_t)sf->f_bavail * (quad_t)sf->f_frsize); 3370 txdr_hyper(tval, &sfp->sf_abytes); 3371 tval = (u_quad_t)sf->f_files; 3372 txdr_hyper(tval, &sfp->sf_tfiles); 3373 tval = (u_quad_t)sf->f_ffree; 3374 txdr_hyper(tval, &sfp->sf_ffiles); 3375 txdr_hyper(tval, &sfp->sf_afiles); 3376 sfp->sf_invarsec = 0; 3377 } else { 3378 sfp->sf_tsize = txdr_unsigned(NFS_MAXDGRAMDATA); 3379 sfp->sf_bsize = txdr_unsigned(sf->f_frsize); 3380 sfp->sf_blocks = txdr_unsigned(sf->f_blocks); 3381 sfp->sf_bfree = txdr_unsigned(sf->f_bfree); 3382 sfp->sf_bavail = txdr_unsigned(sf->f_bavail); 3383 } 3384 nfsmout: 3385 if (sf) 3386 free(sf, M_TEMP); 3387 return error; 3388 } 3389 3390 /* 3391 * nfs fsinfo service 3392 */ 3393 int 3394 nfsrv_fsinfo(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 3395 { 3396 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3397 struct mbuf *nam = nfsd->nd_nam; 3398 char *dpos = nfsd->nd_dpos; 3399 kauth_cred_t cred = nfsd->nd_cr; 3400 u_int32_t *tl; 3401 struct nfsv3_fsinfo *sip; 3402 int32_t t1; 3403 char *bpos; 3404 int error = 0, rdonly, cache = 0, getret = 1; 3405 uint32_t maxdata; 3406 char *cp2; 3407 struct mbuf *mb, *mreq __unused; 3408 struct vnode *vp; 3409 struct vattr at; 3410 nfsrvfh_t nsfh; 3411 u_quad_t frev, maxfsize; 3412 struct statvfs *sb; 3413 3414 nfsm_srvmtofh(&nsfh); 3415 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 3416 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 3417 if (error) { 3418 nfsm_reply(NFSX_UNSIGNED); 3419 nfsm_srvpostop_attr(getret, &at); 3420 return (0); 3421 } 3422 3423 /* XXX Try to make a guess on the max file size. */ 3424 sb = malloc(sizeof(*sb), M_TEMP, M_WAITOK); 3425 VFS_STATVFS(vp->v_mount, sb); 3426 maxfsize = (u_quad_t)0x80000000 * sb->f_frsize - 1; 3427 free(sb, M_TEMP); 3428 3429 getret = VOP_GETATTR(vp, &at, cred); 3430 vput(vp); 3431 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3FSINFO); 3432 nfsm_srvpostop_attr(getret, &at); 3433 nfsm_build(sip, struct nfsv3_fsinfo *, NFSX_V3FSINFO); 3434 3435 /* 3436 * XXX 3437 * There should be file system VFS OP(s) to get this information. 3438 * For now, assume ufs. 3439 */ 3440 if (slp->ns_so->so_type == SOCK_DGRAM) 3441 maxdata = NFS_MAXDGRAMDATA; 3442 else 3443 maxdata = NFS_MAXDATA; 3444 sip->fs_rtmax = txdr_unsigned(maxdata); 3445 sip->fs_rtpref = txdr_unsigned(maxdata); 3446 sip->fs_rtmult = txdr_unsigned(NFS_FABLKSIZE); 3447 sip->fs_wtmax = txdr_unsigned(maxdata); 3448 sip->fs_wtpref = txdr_unsigned(maxdata); 3449 sip->fs_wtmult = txdr_unsigned(NFS_FABLKSIZE); 3450 sip->fs_dtpref = txdr_unsigned(maxdata); 3451 txdr_hyper(maxfsize, &sip->fs_maxfilesize); 3452 sip->fs_timedelta.nfsv3_sec = 0; 3453 sip->fs_timedelta.nfsv3_nsec = txdr_unsigned(1); 3454 sip->fs_properties = txdr_unsigned(NFSV3FSINFO_LINK | 3455 NFSV3FSINFO_SYMLINK | NFSV3FSINFO_HOMOGENEOUS | 3456 NFSV3FSINFO_CANSETTIME); 3457 nfsm_srvdone; 3458 } 3459 3460 /* 3461 * nfs pathconf service 3462 */ 3463 int 3464 nfsrv_pathconf(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 3465 { 3466 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3467 struct mbuf *nam = nfsd->nd_nam; 3468 char *dpos = nfsd->nd_dpos; 3469 kauth_cred_t cred = nfsd->nd_cr; 3470 u_int32_t *tl; 3471 struct nfsv3_pathconf *pc; 3472 int32_t t1; 3473 char *bpos; 3474 int error = 0, rdonly, cache = 0, getret = 1; 3475 register_t linkmax, namemax, chownres, notrunc; 3476 char *cp2; 3477 struct mbuf *mb, *mreq __unused; 3478 struct vnode *vp; 3479 struct vattr at; 3480 nfsrvfh_t nsfh; 3481 u_quad_t frev; 3482 3483 nfsm_srvmtofh(&nsfh); 3484 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 3485 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 3486 if (error) { 3487 nfsm_reply(NFSX_UNSIGNED); 3488 nfsm_srvpostop_attr(getret, &at); 3489 return (0); 3490 } 3491 error = VOP_PATHCONF(vp, _PC_LINK_MAX, &linkmax); 3492 if (!error) 3493 error = VOP_PATHCONF(vp, _PC_NAME_MAX, &namemax); 3494 if (!error) 3495 error = VOP_PATHCONF(vp, _PC_CHOWN_RESTRICTED, &chownres); 3496 if (!error) 3497 error = VOP_PATHCONF(vp, _PC_NO_TRUNC, ¬runc); 3498 getret = VOP_GETATTR(vp, &at, cred); 3499 vput(vp); 3500 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3PATHCONF); 3501 nfsm_srvpostop_attr(getret, &at); 3502 if (error) 3503 return (0); 3504 nfsm_build(pc, struct nfsv3_pathconf *, NFSX_V3PATHCONF); 3505 3506 pc->pc_linkmax = txdr_unsigned(linkmax); 3507 pc->pc_namemax = txdr_unsigned(namemax); 3508 pc->pc_notrunc = txdr_unsigned(notrunc); 3509 pc->pc_chownrestricted = txdr_unsigned(chownres); 3510 3511 /* 3512 * These should probably be supported by VOP_PATHCONF(), but 3513 * until msdosfs is exportable (why would you want to?), the 3514 * Unix defaults should be ok. 3515 */ 3516 pc->pc_caseinsensitive = nfs_false; 3517 pc->pc_casepreserving = nfs_true; 3518 nfsm_srvdone; 3519 } 3520 3521 /* 3522 * Null operation, used by clients to ping server 3523 */ 3524 /* ARGSUSED */ 3525 int 3526 nfsrv_null(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, 3527 struct lwp *lwp, struct mbuf **mrq) 3528 { 3529 struct mbuf *mrep = nfsd->nd_mrep; 3530 char *bpos; 3531 int error = NFSERR_RETVOID, cache = 0; 3532 struct mbuf *mb, *mreq __unused; 3533 u_quad_t frev; 3534 3535 nfsm_reply(0); 3536 nfsmout: 3537 return (0); 3538 } 3539 3540 /* 3541 * No operation, used for obsolete procedures 3542 */ 3543 /* ARGSUSED */ 3544 int 3545 nfsrv_noop(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, 3546 struct lwp *lwp, struct mbuf **mrq) 3547 { 3548 struct mbuf *mrep = nfsd->nd_mrep; 3549 char *bpos; 3550 int error, cache = 0; 3551 struct mbuf *mb, *mreq __unused; 3552 u_quad_t frev; 3553 3554 if (nfsd->nd_repstat) 3555 error = nfsd->nd_repstat; 3556 else 3557 error = EPROCUNAVAIL; 3558 nfsm_reply(0); 3559 nfsmout: 3560 return (0); 3561 } 3562 3563 /* 3564 * Perform access checking for vnodes obtained from file handles that would 3565 * refer to files already opened by a Unix client. You cannot just use 3566 * vn_writechk() and VOP_ACCESS() for two reasons. 3567 * 1 - You must check for exported rdonly as well as MNT_RDONLY for the write case 3568 * 2 - The owner is to be given access irrespective of mode bits for some 3569 * operations, so that processes that chmod after opening a file don't 3570 * break. I don't like this because it opens a security hole, but since 3571 * the nfs server opens a security hole the size of a barn door anyhow, 3572 * what the heck. 3573 * 3574 * The exception to rule 2 is EPERM. If a file is IMMUTABLE, VOP_ACCESS() 3575 * will return EPERM instead of EACCES. EPERM is always an error. 3576 */ 3577 int 3578 nfsrv_access(struct vnode *vp, int flags, kauth_cred_t cred, int rdonly, struct lwp *lwp, int override) 3579 { 3580 struct vattr vattr; 3581 int error; 3582 if (flags & VWRITE) { 3583 /* Just vn_writechk() changed to check rdonly */ 3584 /* 3585 * Disallow write attempts on read-only file systems; 3586 * unless the file is a socket or a block or character 3587 * device resident on the file system. 3588 */ 3589 if (rdonly || (vp->v_mount->mnt_flag & MNT_RDONLY)) { 3590 switch (vp->v_type) { 3591 case VREG: 3592 case VDIR: 3593 case VLNK: 3594 return (EROFS); 3595 default: 3596 break; 3597 } 3598 } 3599 3600 /* 3601 * If the vnode is in use as a process's text, 3602 * we can't allow writing. 3603 */ 3604 if (vp->v_iflag & VI_TEXT) 3605 return (ETXTBSY); 3606 } 3607 error = VOP_GETATTR(vp, &vattr, cred); 3608 if (error) 3609 return (error); 3610 error = VOP_ACCESS(vp, flags, cred); 3611 /* 3612 * Allow certain operations for the owner (reads and writes 3613 * on files that are already open). 3614 */ 3615 if (override && error == EACCES && kauth_cred_geteuid(cred) == vattr.va_uid) 3616 error = 0; 3617 return error; 3618 } 3619
Indexes created Tue Sep 23 14:10:03 GMT 2025