nfs_serv.c revision 1.179
1 /* $NetBSD: nfs_serv.c,v 1.179 2020/01/17 20:08:09 ad 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 1.179 2020/01/17 20:08:09 ad 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/fstrans.h> 68 #include <sys/socket.h> 69 #include <sys/socketvar.h> 70 #include <sys/mbuf.h> 71 #include <sys/dirent.h> 72 #include <sys/stat.h> 73 #include <sys/kernel.h> 74 #include <sys/hash.h> 75 #include <sys/kauth.h> 76 #include <sys/module.h> 77 #include <sys/syscall.h> 78 #include <sys/syscallargs.h> 79 #include <sys/syscallvar.h> 80 81 #include <uvm/uvm.h> 82 83 #include <nfs/nfsproto.h> 84 #include <nfs/rpcv2.h> 85 #include <nfs/nfs.h> 86 #include <nfs/xdr_subs.h> 87 #include <nfs/nfsm_subs.h> 88 #include <nfs/nfs_var.h> 89 90 MODULE(MODULE_CLASS_MISC, nfsserver, "nfs"); 91 92 /* Global vars */ 93 extern u_int32_t nfs_xdrneg1; 94 extern u_int32_t nfs_false, nfs_true; 95 extern const enum vtype nv3tov_type[8]; 96 extern struct nfsstats nfsstats; 97 extern const nfstype nfsv2_type[9]; 98 extern const nfstype nfsv3_type[9]; 99 int nfsrvw_procrastinate = NFS_GATHERDELAY * 1000; 100 bool nfsd_use_loan = true; /* use page-loan for READ OP */ 101 102 #define nqsrv_getl(vp, rw) /* nothing */ 103 104 static const struct syscall_package nfsserver_syscalls[] = { 105 { SYS_nfssvc, 0, (sy_call_t *)sys_nfssvc }, 106 { 0, 0, NULL }, 107 }; 108 109 static int 110 nfsserver_modcmd(modcmd_t cmd, void *arg) 111 { 112 extern struct vfs_hooks nfs_export_hooks; /* XXX */ 113 int error; 114 115 switch (cmd) { 116 case MODULE_CMD_INIT: 117 error = syscall_establish(NULL, nfsserver_syscalls); 118 if (error != 0) { 119 return error; 120 } 121 nfs_init(); /* XXX for monolithic kernel */ 122 netexport_init(); 123 nfsrv_initcache(); /* Init the server request cache */ 124 nfsrv_init(0); /* Init server data structures */ 125 vfs_hooks_attach(&nfs_export_hooks); 126 nfs_timer_srvinit(nfsrv_timer); 127 return 0; 128 case MODULE_CMD_FINI: 129 error = syscall_disestablish(NULL, nfsserver_syscalls); 130 if (error != 0) { 131 return error; 132 } 133 /* 134 * Kill export list before detaching VFS hooks, so we 135 * we don't leak state due to a concurrent umount(). 136 */ 137 netexport_fini(); 138 vfs_hooks_detach(&nfs_export_hooks); 139 140 /* Kill timer before server goes away. */ 141 nfs_timer_srvfini(); 142 nfsrv_fini(); 143 144 /* Server uses server cache, so kill cache last. */ 145 nfsrv_finicache(); 146 nfs_fini(); 147 return 0; 148 case MODULE_CMD_AUTOUNLOAD: 149 if (netexport_hasexports()) 150 return EBUSY; 151 /*FALLTHROUGH*/ 152 default: 153 return ENOTTY; 154 } 155 } 156 157 /* 158 * nfs v3 access service 159 */ 160 int 161 nfsrv3_access(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 162 { 163 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 164 struct mbuf *nam = nfsd->nd_nam; 165 char *dpos = nfsd->nd_dpos; 166 kauth_cred_t cred = nfsd->nd_cr; 167 struct vnode *vp; 168 nfsrvfh_t nsfh; 169 u_int32_t *tl; 170 int32_t t1; 171 char *bpos; 172 int error = 0, rdonly, cache = 0, getret; 173 char *cp2; 174 struct mbuf *mb, *mreq __unused; 175 struct vattr va; 176 u_long inmode, testmode, outmode; 177 u_quad_t frev; 178 179 nfsm_srvmtofh(&nsfh); 180 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 181 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, &rdonly, 182 (nfsd->nd_flag & ND_KERBAUTH), false); 183 if (error) { 184 nfsm_reply(NFSX_UNSIGNED); 185 nfsm_srvpostop_attr(1, (struct vattr *)0); 186 return (0); 187 } 188 inmode = fxdr_unsigned(u_int32_t, *tl); 189 outmode = 0; 190 if ((inmode & NFSV3ACCESS_READ) && 191 nfsrv_access(vp, VREAD, cred, rdonly, lwp, 0) == 0) 192 outmode |= NFSV3ACCESS_READ; 193 if (vp->v_type != VDIR) { 194 testmode = inmode & (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND); 195 if (testmode && 196 nfsrv_access(vp, VWRITE, cred, rdonly, lwp, 0) == 0) 197 outmode |= testmode; 198 if ((inmode & NFSV3ACCESS_EXECUTE) && 199 nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 0) == 0) 200 outmode |= NFSV3ACCESS_EXECUTE; 201 } else { 202 testmode = inmode & (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | 203 NFSV3ACCESS_DELETE); 204 if (testmode && 205 nfsrv_access(vp, VWRITE, cred, rdonly, lwp, 0) == 0) 206 outmode |= testmode; 207 if ((inmode & NFSV3ACCESS_LOOKUP) && 208 nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 0) == 0) 209 outmode |= NFSV3ACCESS_LOOKUP; 210 } 211 getret = VOP_GETATTR(vp, &va, cred); 212 vput(vp); 213 nfsm_reply(NFSX_POSTOPATTR(1) + NFSX_UNSIGNED); 214 nfsm_srvpostop_attr(getret, &va); 215 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 216 *tl = txdr_unsigned(outmode); 217 nfsm_srvdone; 218 } 219 220 /* 221 * nfs getattr service 222 */ 223 int 224 nfsrv_getattr(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 225 { 226 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 227 struct mbuf *nam = nfsd->nd_nam; 228 char *dpos = nfsd->nd_dpos; 229 kauth_cred_t cred = nfsd->nd_cr; 230 struct nfs_fattr *fp; 231 struct vattr va; 232 struct vnode *vp; 233 nfsrvfh_t nsfh; 234 u_int32_t *tl; 235 int32_t t1; 236 char *bpos; 237 int error = 0, rdonly, cache = 0; 238 char *cp2; 239 struct mbuf *mb, *mreq __unused; 240 u_quad_t frev; 241 242 nfsm_srvmtofh(&nsfh); 243 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, &rdonly, 244 (nfsd->nd_flag & ND_KERBAUTH), false); 245 if (error) { 246 nfsm_reply(0); 247 return (0); 248 } 249 nqsrv_getl(vp, ND_READ); 250 error = VOP_GETATTR(vp, &va, cred); 251 vput(vp); 252 nfsm_reply(NFSX_FATTR(nfsd->nd_flag & ND_NFSV3)); 253 if (error) 254 return (0); 255 nfsm_build(fp, struct nfs_fattr *, NFSX_FATTR(nfsd->nd_flag & ND_NFSV3)); 256 nfsm_srvfillattr(&va, fp); 257 nfsm_srvdone; 258 } 259 260 /* 261 * nfs setattr service 262 */ 263 int 264 nfsrv_setattr(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 265 { 266 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 267 struct mbuf *nam = nfsd->nd_nam; 268 char *dpos = nfsd->nd_dpos; 269 kauth_cred_t cred = nfsd->nd_cr; 270 struct vattr va, preat; 271 struct nfsv2_sattr *sp; 272 struct nfs_fattr *fp; 273 struct vnode *vp; 274 nfsrvfh_t nsfh; 275 u_int32_t *tl; 276 int32_t t1; 277 char *bpos; 278 int error = 0, rdonly, cache = 0, preat_ret = 1, postat_ret = 1; 279 int v3 = (nfsd->nd_flag & ND_NFSV3), gcheck = 0; 280 char *cp2; 281 struct mbuf *mb, *mreq __unused; 282 u_quad_t frev; 283 struct timespec guard; 284 285 memset(&guard, 0, sizeof guard); /* XXX gcc */ 286 287 nfsm_srvmtofh(&nsfh); 288 vattr_null(&va); 289 if (v3) { 290 nfsm_srvsattr(&va); 291 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 292 gcheck = fxdr_unsigned(int, *tl); 293 if (gcheck) { 294 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 295 fxdr_nfsv3time(tl, &guard); 296 } 297 } else { 298 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 299 /* 300 * Nah nah nah nah na nah 301 * There is a bug in the Sun client that puts 0xffff in the mode 302 * field of sattr when it should put in 0xffffffff. The u_short 303 * doesn't sign extend. 304 * --> check the low order 2 bytes for 0xffff 305 */ 306 if ((fxdr_unsigned(int, sp->sa_mode) & 0xffff) != 0xffff) 307 va.va_mode = nfstov_mode(sp->sa_mode); 308 if (sp->sa_uid != nfs_xdrneg1) 309 va.va_uid = fxdr_unsigned(uid_t, sp->sa_uid); 310 if (sp->sa_gid != nfs_xdrneg1) 311 va.va_gid = fxdr_unsigned(gid_t, sp->sa_gid); 312 if (sp->sa_size != nfs_xdrneg1) 313 va.va_size = fxdr_unsigned(u_quad_t, sp->sa_size); 314 if (sp->sa_atime.nfsv2_sec != nfs_xdrneg1) { 315 #ifdef notyet 316 fxdr_nfsv2time(&sp->sa_atime, &va.va_atime); 317 #else 318 va.va_atime.tv_sec = 319 fxdr_unsigned(u_int32_t,sp->sa_atime.nfsv2_sec); 320 va.va_atime.tv_nsec = 0; 321 #endif 322 } 323 if (sp->sa_mtime.nfsv2_sec != nfs_xdrneg1) 324 fxdr_nfsv2time(&sp->sa_mtime, &va.va_mtime); 325 326 } 327 328 /* 329 * Now that we have all the fields, lets do it. 330 */ 331 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, &rdonly, 332 (nfsd->nd_flag & ND_KERBAUTH), false); 333 if (error) { 334 nfsm_reply(2 * NFSX_UNSIGNED); 335 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 336 return (0); 337 } 338 nqsrv_getl(vp, ND_WRITE); 339 if (v3) { 340 error = preat_ret = VOP_GETATTR(vp, &preat, cred); 341 if (!error && gcheck && 342 (preat.va_ctime.tv_sec != guard.tv_sec || 343 preat.va_ctime.tv_nsec != guard.tv_nsec)) 344 error = NFSERR_NOT_SYNC; 345 if (error) { 346 vput(vp); 347 nfsm_reply(NFSX_WCCDATA(v3)); 348 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 349 return (0); 350 } 351 } 352 353 /* 354 * If the size is being changed write acces is required, otherwise 355 * just check for a read only file system. 356 */ 357 if (va.va_size == ((u_quad_t)((quad_t) -1))) { 358 if (rdonly || (vp->v_mount->mnt_flag & MNT_RDONLY)) { 359 error = EROFS; 360 goto out; 361 } 362 } else { 363 if (vp->v_type == VDIR) { 364 error = EISDIR; 365 goto out; 366 } else if ((error = nfsrv_access(vp, VWRITE, cred, rdonly, 367 lwp, 0)) != 0) 368 goto out; 369 } 370 error = VOP_SETATTR(vp, &va, cred); 371 postat_ret = VOP_GETATTR(vp, &va, cred); 372 if (!error) 373 error = postat_ret; 374 out: 375 vput(vp); 376 nfsm_reply(NFSX_WCCORFATTR(v3)); 377 if (v3) { 378 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 379 return (0); 380 } else { 381 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 382 nfsm_srvfillattr(&va, fp); 383 } 384 nfsm_srvdone; 385 } 386 387 /* 388 * nfs lookup rpc 389 */ 390 int 391 nfsrv_lookup(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 392 { 393 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 394 struct mbuf *nam = nfsd->nd_nam; 395 char *dpos = nfsd->nd_dpos; 396 kauth_cred_t cred = nfsd->nd_cr; 397 struct nfs_fattr *fp; 398 struct nameidata nd, ind, *ndp = &nd; 399 struct pathbuf *ipb = NULL; 400 struct vnode *vp, *dirp; 401 nfsrvfh_t nsfh; 402 char *cp; 403 u_int32_t *tl; 404 int32_t t1; 405 char *bpos; 406 int error = 0, cache = 0, dirattr_ret = 1; 407 uint32_t len; 408 int v3 = (nfsd->nd_flag & ND_NFSV3), pubflag; 409 char *cp2; 410 struct mbuf *mb, *mreq __unused; 411 struct vattr va, dirattr; 412 u_quad_t frev; 413 414 nfsm_srvmtofh(&nsfh); 415 nfsm_srvnamesiz(len); 416 417 pubflag = nfs_ispublicfh(&nsfh); 418 419 nd.ni_cnd.cn_cred = cred; 420 nd.ni_cnd.cn_nameiop = LOOKUP; 421 nd.ni_cnd.cn_flags = LOCKLEAF; 422 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 423 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), pubflag); 424 425 if (!error && pubflag) { 426 if (nd.ni_vp->v_type == VDIR && nfs_pub.np_index != NULL && 427 (ipb = pathbuf_create(nfs_pub.np_index)) != NULL) { 428 /* 429 * Setup call to lookup() to see if we can find 430 * the index file. Arguably, this doesn't belong 431 * in a kernel.. Ugh. 432 */ 433 ind = nd; 434 VOP_UNLOCK(nd.ni_vp); 435 ind.ni_pathbuf = ipb; 436 437 error = lookup_for_nfsd_index(&ind, nd.ni_vp); 438 if (!error) { 439 /* 440 * Found an index file. Get rid of 441 * the old references. 442 */ 443 if (dirp) 444 vrele(dirp); 445 dirp = nd.ni_vp; 446 ndp = &ind; 447 } else 448 error = 0; 449 } 450 /* 451 * If the public filehandle was used, check that this lookup 452 * didn't result in a filehandle outside the publicly exported 453 * filesystem. 454 */ 455 456 if (!error && ndp->ni_vp->v_mount != nfs_pub.np_mount) { 457 vput(nd.ni_vp); 458 error = EPERM; 459 } 460 } 461 462 if (error) { 463 if (nd.ni_pathbuf != NULL) { 464 pathbuf_destroy(nd.ni_pathbuf); 465 } 466 if (ipb != NULL) { 467 pathbuf_destroy(ipb); 468 } 469 if (dirp) { 470 if (v3) { 471 vn_lock(dirp, LK_SHARED | LK_RETRY); 472 dirattr_ret = VOP_GETATTR(dirp, &dirattr, cred); 473 vput(dirp); 474 } else 475 vrele(dirp); 476 } 477 nfsm_reply(NFSX_POSTOPATTR(v3)); 478 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 479 return (0); 480 } 481 482 nqsrv_getl(ndp->ni_startdir, ND_READ); 483 pathbuf_destroy(nd.ni_pathbuf); 484 if (ipb != NULL) { 485 pathbuf_destroy(ipb); 486 } 487 vp = ndp->ni_vp; 488 error = nfsrv_composefh(vp, &nsfh, v3); 489 if (!error) 490 error = VOP_GETATTR(vp, &va, cred); 491 vput(vp); 492 if (dirp) { 493 if (v3) { 494 vn_lock(dirp, LK_SHARED | LK_RETRY); 495 dirattr_ret = VOP_GETATTR(dirp, &dirattr, cred); 496 vput(dirp); 497 } else 498 vrele(dirp); 499 } 500 nfsm_reply(NFSX_SRVFH(&nsfh, v3) + NFSX_POSTOPORFATTR(v3) + 501 NFSX_POSTOPATTR(v3)); 502 if (error) { 503 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 504 return (0); 505 } 506 nfsm_srvfhtom(&nsfh, v3); 507 if (v3) { 508 nfsm_srvpostop_attr(0, &va); 509 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 510 } else { 511 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 512 nfsm_srvfillattr(&va, fp); 513 } 514 nfsm_srvdone; 515 } 516 517 /* 518 * nfs readlink service 519 */ 520 int 521 nfsrv_readlink(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 522 { 523 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 524 struct mbuf *nam = nfsd->nd_nam; 525 char *dpos = nfsd->nd_dpos; 526 kauth_cred_t cred = nfsd->nd_cr; 527 struct iovec iv[(NFS_MAXPATHLEN+MLEN-1)/MLEN]; 528 struct iovec *ivp = iv; 529 struct mbuf *mp; 530 u_int32_t *tl; 531 int32_t t1; 532 char *bpos; 533 int error = 0, rdonly, cache = 0, i, padlen, getret; 534 uint32_t len; 535 int v3 = (nfsd->nd_flag & ND_NFSV3); 536 char *cp2; 537 struct mbuf *mb, *mp2 = NULL, *mp3 = NULL, *mreq __unused; 538 struct vnode *vp; 539 struct vattr attr; 540 nfsrvfh_t nsfh; 541 struct uio io, *uiop = &io; 542 u_quad_t frev; 543 544 nfsm_srvmtofh(&nsfh); 545 len = 0; 546 i = 0; 547 while (len < NFS_MAXPATHLEN) { 548 mp = m_get(M_WAIT, MT_DATA); 549 MCLAIM(mp, &nfs_mowner); 550 m_clget(mp, M_WAIT); 551 mp->m_len = NFSMSIZ(mp); 552 if (len == 0) 553 mp3 = mp2 = mp; 554 else { 555 mp2->m_next = mp; 556 mp2 = mp; 557 } 558 if ((len+mp->m_len) > NFS_MAXPATHLEN) { 559 mp->m_len = NFS_MAXPATHLEN-len; 560 len = NFS_MAXPATHLEN; 561 } else 562 len += mp->m_len; 563 ivp->iov_base = mtod(mp, void *); 564 ivp->iov_len = mp->m_len; 565 i++; 566 ivp++; 567 } 568 uiop->uio_iov = iv; 569 uiop->uio_iovcnt = i; 570 uiop->uio_offset = 0; 571 uiop->uio_resid = len; 572 uiop->uio_rw = UIO_READ; 573 UIO_SETUP_SYSSPACE(uiop); 574 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 575 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 576 if (error) { 577 m_freem(mp3); 578 nfsm_reply(2 * NFSX_UNSIGNED); 579 nfsm_srvpostop_attr(1, (struct vattr *)0); 580 return (0); 581 } 582 if (vp->v_type != VLNK) { 583 if (v3) 584 error = EINVAL; 585 else 586 error = ENXIO; 587 goto out; 588 } 589 nqsrv_getl(vp, ND_READ); 590 error = VOP_READLINK(vp, uiop, cred); 591 out: 592 getret = VOP_GETATTR(vp, &attr, cred); 593 vput(vp); 594 if (error) 595 m_freem(mp3); 596 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_UNSIGNED); 597 if (v3) { 598 nfsm_srvpostop_attr(getret, &attr); 599 if (error) 600 return (0); 601 } 602 len -= uiop->uio_resid; 603 padlen = nfsm_padlen(len); 604 if (len == 0) { 605 m_freem(mp3); 606 mp3 = NULL; 607 } else if (uiop->uio_resid || padlen) 608 nfs_zeropad(mp3, uiop->uio_resid, padlen); 609 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 610 *tl = txdr_unsigned(len); 611 mb->m_next = mp3; 612 nfsm_srvdone; 613 } 614 615 /* 616 * nfs read service 617 */ 618 int 619 nfsrv_read(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 620 { 621 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 622 struct mbuf *nam = nfsd->nd_nam; 623 char *dpos = nfsd->nd_dpos; 624 kauth_cred_t cred = nfsd->nd_cr; 625 struct mbuf *m; 626 struct nfs_fattr *fp; 627 u_int32_t *tl; 628 int32_t t1; 629 int i; 630 char *bpos; 631 int error = 0, rdonly, cache = 0, getret; 632 int v3 = (nfsd->nd_flag & ND_NFSV3); 633 uint32_t reqlen, len, cnt, left; 634 int padlen; 635 char *cp2; 636 struct mbuf *mb, *mreq; 637 struct vnode *vp; 638 nfsrvfh_t nsfh; 639 struct uio io, *uiop = &io; 640 struct vattr va; 641 off_t off; 642 u_quad_t frev; 643 644 nfsm_srvmtofh(&nsfh); 645 if (v3) { 646 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 647 off = fxdr_hyper(tl); 648 } else { 649 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 650 off = (off_t)fxdr_unsigned(u_int32_t, *tl); 651 } 652 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 653 reqlen = fxdr_unsigned(uint32_t, *tl); 654 reqlen = MIN(reqlen, NFS_SRVMAXDATA(nfsd)); 655 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 656 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 657 if (error) { 658 nfsm_reply(2 * NFSX_UNSIGNED); 659 nfsm_srvpostop_attr(1, (struct vattr *)0); 660 return (0); 661 } 662 if (vp->v_type != VREG) { 663 if (v3) 664 error = EINVAL; 665 else 666 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 667 } 668 if (!error) { 669 nqsrv_getl(vp, ND_READ); 670 if ((error = nfsrv_access(vp, VREAD, cred, rdonly, lwp, 1)) != 0) 671 error = nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 1); 672 } 673 getret = VOP_GETATTR(vp, &va, cred); 674 if (!error) 675 error = getret; 676 if (error) { 677 vput(vp); 678 nfsm_reply(NFSX_POSTOPATTR(v3)); 679 nfsm_srvpostop_attr(getret, &va); 680 return (0); 681 } 682 if (off >= va.va_size) 683 cnt = 0; 684 else if ((off + reqlen) > va.va_size) 685 cnt = va.va_size - off; 686 else 687 cnt = reqlen; 688 nfsm_reply(NFSX_POSTOPORFATTR(v3) + 3 * NFSX_UNSIGNED+nfsm_rndup(cnt)); 689 if (v3) { 690 nfsm_build(tl, u_int32_t *, NFSX_V3FATTR + 4 * NFSX_UNSIGNED); 691 *tl++ = nfs_true; 692 fp = (struct nfs_fattr *)tl; 693 tl += (NFSX_V3FATTR / sizeof (u_int32_t)); 694 } else { 695 nfsm_build(tl, u_int32_t *, NFSX_V2FATTR + NFSX_UNSIGNED); 696 fp = (struct nfs_fattr *)tl; 697 tl += (NFSX_V2FATTR / sizeof (u_int32_t)); 698 } 699 len = left = cnt; 700 if (cnt > 0) { 701 if (nfsd_use_loan) { 702 struct vm_page **pgpp; 703 voff_t pgoff = trunc_page(off); 704 int npages; 705 vaddr_t lva; 706 707 npages = (round_page(off + cnt) - pgoff) >> PAGE_SHIFT; 708 KASSERT(npages <= M_EXT_MAXPAGES); /* XXX */ 709 710 /* allocate kva for mbuf data */ 711 lva = sokvaalloc(pgoff, npages << PAGE_SHIFT, 712 slp->ns_so); 713 if (lva == 0) { 714 /* fall back to VOP_READ */ 715 goto loan_fail; 716 } 717 718 /* allocate mbuf */ 719 m = m_get(M_WAIT, MT_DATA); 720 MCLAIM(m, &nfs_mowner); 721 pgpp = m->m_ext.ext_pgs; 722 723 /* loan pages */ 724 error = uvm_loanuobjpages(&vp->v_uobj, pgoff, npages, 725 pgpp); 726 if (error) { 727 sokvafree(lva, npages << PAGE_SHIFT); 728 m_free(m); 729 if (error == EBUSY) 730 goto loan_fail; 731 goto read_error; 732 } 733 734 /* associate kva to mbuf */ 735 MEXTADD(m, (void *)(lva + ((vaddr_t)off & PAGE_MASK)), 736 cnt, M_MBUF, soloanfree, slp->ns_so); 737 m->m_flags |= M_EXT_PAGES | M_EXT_ROMAP; 738 m->m_len = cnt; 739 740 /* map pages */ 741 for (i = 0; i < npages; i++) { 742 pmap_kenter_pa(lva, VM_PAGE_TO_PHYS(pgpp[i]), 743 VM_PROT_READ, 0); 744 lva += PAGE_SIZE; 745 } 746 747 pmap_update(pmap_kernel()); 748 749 mb->m_next = m; 750 mb = m; 751 error = 0; 752 uiop->uio_resid = 0; 753 } else { 754 struct iovec *iv; 755 struct iovec *iv2; 756 struct mbuf *m2; 757 int siz; 758 loan_fail: 759 /* 760 * Generate the mbuf list with the uio_iov ref. to it. 761 */ 762 i = 0; 763 m = m2 = mb; 764 while (left > 0) { 765 siz = uimin(M_TRAILINGSPACE(m), left); 766 if (siz > 0) { 767 left -= siz; 768 i++; 769 } 770 if (left > 0) { 771 m = m_get(M_WAIT, MT_DATA); 772 MCLAIM(m, &nfs_mowner); 773 m_clget(m, M_WAIT); 774 m->m_len = 0; 775 m2->m_next = m; 776 m2 = m; 777 } 778 } 779 iv = malloc(i * sizeof(struct iovec), M_TEMP, M_WAITOK); 780 uiop->uio_iov = iv2 = iv; 781 m = mb; 782 left = cnt; 783 i = 0; 784 while (left > 0) { 785 if (m == NULL) 786 panic("nfsrv_read iov"); 787 siz = uimin(M_TRAILINGSPACE(m), left); 788 if (siz > 0) { 789 iv->iov_base = mtod(m, char *) + 790 m->m_len; 791 iv->iov_len = siz; 792 m->m_len += siz; 793 left -= siz; 794 iv++; 795 i++; 796 } 797 m = m->m_next; 798 } 799 uiop->uio_iovcnt = i; 800 uiop->uio_offset = off; 801 uiop->uio_resid = cnt; 802 uiop->uio_rw = UIO_READ; 803 UIO_SETUP_SYSSPACE(uiop); 804 error = VOP_READ(vp, uiop, IO_NODELOCKED, cred); 805 free((void *)iv2, M_TEMP); 806 } 807 read_error: 808 if (error || (getret = VOP_GETATTR(vp, &va, cred)) != 0){ 809 if (!error) 810 error = getret; 811 m_freem(mreq); 812 vput(vp); 813 nfsm_reply(NFSX_POSTOPATTR(v3)); 814 nfsm_srvpostop_attr(getret, &va); 815 return (0); 816 } 817 } else { 818 uiop->uio_resid = 0; 819 } 820 vput(vp); 821 nfsm_srvfillattr(&va, fp); 822 len -= uiop->uio_resid; 823 padlen = nfsm_padlen(len); 824 if (uiop->uio_resid || padlen) 825 nfs_zeropad(mb, uiop->uio_resid, padlen); 826 if (v3) { 827 /* count */ 828 *tl++ = txdr_unsigned(len); 829 /* eof */ 830 if (off + len >= va.va_size) 831 *tl++ = nfs_true; 832 else 833 *tl++ = nfs_false; 834 } 835 *tl = txdr_unsigned(len); 836 nfsm_srvdone; 837 } 838 839 /* 840 * nfs write service 841 */ 842 int 843 nfsrv_write(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 844 { 845 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 846 struct mbuf *nam = nfsd->nd_nam; 847 char *dpos = nfsd->nd_dpos; 848 kauth_cred_t cred = nfsd->nd_cr; 849 struct iovec *ivp; 850 int i, cnt; 851 struct mbuf *mp; 852 struct nfs_fattr *fp; 853 struct iovec *iv; 854 struct vattr va, forat; 855 u_int32_t *tl; 856 int32_t t1; 857 char *bpos; 858 int error = 0, rdonly, cache = 0, len, forat_ret = 1; 859 int ioflags, aftat_ret = 1, retlen, zeroing, adjust; 860 int stable = NFSV3WRITE_FILESYNC; 861 int v3 = (nfsd->nd_flag & ND_NFSV3); 862 char *cp2; 863 struct mbuf *mb, *mreq __unused; 864 struct vnode *vp; 865 nfsrvfh_t nsfh; 866 struct uio io, *uiop = &io; 867 off_t off; 868 u_quad_t frev; 869 870 if (mrep == NULL) { 871 *mrq = NULL; 872 return (0); 873 } 874 nfsm_srvmtofh(&nsfh); 875 if (v3) { 876 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 877 off = fxdr_hyper(tl); 878 tl += 3; 879 stable = fxdr_unsigned(int, *tl++); 880 } else { 881 nfsm_dissect(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 882 off = (off_t)fxdr_unsigned(u_int32_t, *++tl); 883 tl += 2; 884 } 885 retlen = len = fxdr_unsigned(int32_t, *tl); 886 cnt = i = 0; 887 888 /* 889 * For NFS Version 2, it is not obvious what a write of zero length 890 * should do, but I might as well be consistent with Version 3, 891 * which is to return ok so long as there are no permission problems. 892 */ 893 if (len > 0) { 894 zeroing = 1; 895 mp = mrep; 896 while (mp) { 897 if (mp == md) { 898 zeroing = 0; 899 adjust = dpos - mtod(mp, char *); 900 mp->m_len -= adjust; 901 if (mp->m_len > 0 && adjust > 0) 902 NFSMADV(mp, adjust); 903 } 904 if (zeroing) 905 mp->m_len = 0; 906 else if (mp->m_len > 0) { 907 i += mp->m_len; 908 if (i > len) { 909 mp->m_len -= (i - len); 910 zeroing = 1; 911 } 912 if (mp->m_len > 0) 913 cnt++; 914 } 915 mp = mp->m_next; 916 } 917 } 918 if (len > NFS_MAXDATA || len < 0 || i < len) { 919 error = EIO; 920 nfsm_reply(2 * NFSX_UNSIGNED); 921 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 922 return (0); 923 } 924 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 925 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 926 if (error) { 927 nfsm_reply(2 * NFSX_UNSIGNED); 928 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 929 return (0); 930 } 931 if (v3) 932 forat_ret = VOP_GETATTR(vp, &forat, cred); 933 if (vp->v_type != VREG) { 934 if (v3) 935 error = EINVAL; 936 else 937 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 938 } 939 if (!error) { 940 nqsrv_getl(vp, ND_WRITE); 941 error = nfsrv_access(vp, VWRITE, cred, rdonly, lwp, 1); 942 } 943 if (error) { 944 vput(vp); 945 nfsm_reply(NFSX_WCCDATA(v3)); 946 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 947 return (0); 948 } 949 950 if (len > 0) { 951 ivp = malloc(cnt * sizeof (struct iovec), M_TEMP, M_WAITOK); 952 uiop->uio_iov = iv = ivp; 953 uiop->uio_iovcnt = cnt; 954 mp = mrep; 955 while (mp) { 956 if (mp->m_len > 0) { 957 ivp->iov_base = mtod(mp, void *); 958 ivp->iov_len = mp->m_len; 959 ivp++; 960 } 961 mp = mp->m_next; 962 } 963 964 /* 965 * XXX 966 * The IO_METASYNC flag indicates that all metadata (and not 967 * just enough to ensure data integrity) must be written to 968 * stable storage synchronously. 969 * (IO_METASYNC is not yet implemented in 4.4BSD-Lite.) 970 */ 971 if (stable == NFSV3WRITE_UNSTABLE) 972 ioflags = IO_NODELOCKED; 973 else if (stable == NFSV3WRITE_DATASYNC) 974 ioflags = (IO_SYNC | IO_NODELOCKED); 975 else 976 ioflags = (IO_METASYNC | IO_SYNC | IO_NODELOCKED); 977 uiop->uio_resid = len; 978 uiop->uio_rw = UIO_WRITE; 979 uiop->uio_offset = off; 980 UIO_SETUP_SYSSPACE(uiop); 981 error = VOP_WRITE(vp, uiop, ioflags, cred); 982 nfsstats.srvvop_writes++; 983 free(iv, M_TEMP); 984 } 985 aftat_ret = VOP_GETATTR(vp, &va, cred); 986 vput(vp); 987 if (!error) 988 error = aftat_ret; 989 nfsm_reply(NFSX_PREOPATTR(v3) + NFSX_POSTOPORFATTR(v3) + 990 2 * NFSX_UNSIGNED + NFSX_WRITEVERF(v3)); 991 if (v3) { 992 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 993 if (error) 994 return (0); 995 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 996 *tl++ = txdr_unsigned(retlen); 997 if (stable == NFSV3WRITE_UNSTABLE) 998 *tl++ = txdr_unsigned(stable); 999 else 1000 *tl++ = txdr_unsigned(NFSV3WRITE_FILESYNC); 1001 /* 1002 * Actually, there is no need to txdr these fields, 1003 * but it may make the values more human readable, 1004 * for debugging purposes. 1005 */ 1006 struct timeval btv; 1007 getmicroboottime(&btv); 1008 *tl++ = txdr_unsigned(btv.tv_sec); 1009 *tl = txdr_unsigned(btv.tv_usec); 1010 } else { 1011 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 1012 nfsm_srvfillattr(&va, fp); 1013 } 1014 nfsm_srvdone; 1015 } 1016 1017 /* 1018 * XXX elad: the original NFSW_SAMECRED() macro also made sure the 1019 * two nd_flag fields of the descriptors contained 1020 * ND_KERBAUTH. 1021 */ 1022 static int 1023 nfsrv_samecred(kauth_cred_t cred1, kauth_cred_t cred2) 1024 { 1025 int i, do_ngroups; 1026 1027 if (kauth_cred_geteuid(cred1) != kauth_cred_geteuid(cred2)) 1028 return (0); 1029 if (kauth_cred_ngroups(cred1) != kauth_cred_ngroups(cred2)) 1030 return (0); 1031 do_ngroups = kauth_cred_ngroups(cred1); 1032 for (i = 0; i < do_ngroups; i++) 1033 if (kauth_cred_group(cred1, i) != 1034 kauth_cred_group(cred2, i)) 1035 return (0); 1036 1037 return (1); 1038 } 1039 1040 static struct nfsrvw_delayhash * 1041 nfsrv_nwdelayhash(struct nfssvc_sock *slp, const nfsrvfh_t *nsfh) 1042 { 1043 uint32_t hash; 1044 1045 hash = hash32_buf(NFSRVFH_DATA(nsfh), NFSRVFH_SIZE(nsfh), 1046 HASH32_BUF_INIT); 1047 return &slp->ns_wdelayhashtbl[hash % NFS_WDELAYHASHSIZ]; 1048 } 1049 1050 /* 1051 * NFS write service with write gathering support. Called when 1052 * nfsrvw_procrastinate > 0. 1053 * See: Chet Juszczak, "Improving the Write Performance of an NFS Server", 1054 * in Proc. of the Winter 1994 Usenix Conference, pg. 247-259, San Franscisco, 1055 * Jan. 1994. 1056 */ 1057 int 1058 nfsrv_writegather(struct nfsrv_descript **ndp, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 1059 { 1060 struct timeval now; 1061 struct iovec *ivp; 1062 struct mbuf *mp; 1063 struct nfsrv_descript *wp, *nfsd, *owp, *swp; 1064 struct nfs_fattr *fp; 1065 int i = 0; 1066 struct iovec *iov; 1067 struct nfsrvw_delayhash *wpp; 1068 kauth_cred_t cred; 1069 struct vattr va, forat; 1070 u_int32_t *tl; 1071 int32_t t1; 1072 char *bpos, *dpos; 1073 int error = 0, rdonly, cache = 0, len = 0, forat_ret = 1; 1074 int ioflags, aftat_ret = 1, adjust, v3, zeroing; 1075 char *cp2; 1076 struct mbuf *mb, *mreq, *mrep, *md; 1077 struct vnode *vp; 1078 struct uio io, *uiop = &io; 1079 u_quad_t frev, cur_usec; 1080 1081 *mrq = NULL; 1082 if (*ndp) { 1083 nfsd = *ndp; 1084 *ndp = NULL; 1085 mrep = nfsd->nd_mrep; 1086 md = nfsd->nd_md; 1087 dpos = nfsd->nd_dpos; 1088 cred = nfsd->nd_cr; 1089 v3 = (nfsd->nd_flag & ND_NFSV3); 1090 LIST_INIT(&nfsd->nd_coalesce); 1091 nfsd->nd_mreq = NULL; 1092 nfsd->nd_stable = NFSV3WRITE_FILESYNC; 1093 getmicrotime(&now); 1094 cur_usec = (u_quad_t)now.tv_sec * 1000000 + (u_quad_t)now.tv_usec; 1095 nfsd->nd_time = cur_usec + nfsrvw_procrastinate; 1096 1097 /* 1098 * Now, get the write header.. 1099 */ 1100 nfsm_srvmtofh(&nfsd->nd_fh); 1101 if (v3) { 1102 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 1103 nfsd->nd_off = fxdr_hyper(tl); 1104 tl += 3; 1105 nfsd->nd_stable = fxdr_unsigned(int, *tl++); 1106 } else { 1107 nfsm_dissect(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1108 nfsd->nd_off = (off_t)fxdr_unsigned(u_int32_t, *++tl); 1109 tl += 2; 1110 } 1111 len = fxdr_unsigned(int32_t, *tl); 1112 nfsd->nd_len = len; 1113 nfsd->nd_eoff = nfsd->nd_off + len; 1114 1115 /* 1116 * Trim the header out of the mbuf list and trim off any trailing 1117 * junk so that the mbuf list has only the write data. 1118 */ 1119 zeroing = 1; 1120 i = 0; 1121 mp = mrep; 1122 while (mp) { 1123 if (mp == md) { 1124 zeroing = 0; 1125 adjust = dpos - mtod(mp, char *); 1126 mp->m_len -= adjust; 1127 if (mp->m_len > 0 && adjust > 0) 1128 NFSMADV(mp, adjust); 1129 } 1130 if (zeroing) 1131 mp->m_len = 0; 1132 else { 1133 i += mp->m_len; 1134 if (i > len) { 1135 mp->m_len -= (i - len); 1136 zeroing = 1; 1137 } 1138 } 1139 mp = mp->m_next; 1140 } 1141 if (len > NFS_MAXDATA || len < 0 || i < len) { 1142 nfsmout: 1143 m_freem(mrep); 1144 error = EIO; 1145 nfsm_writereply(2 * NFSX_UNSIGNED, v3); 1146 if (v3) 1147 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1148 nfsd->nd_mreq = mreq; 1149 nfsd->nd_mrep = NULL; 1150 nfsd->nd_time = 0; 1151 } 1152 1153 /* 1154 * Add this entry to the hash and time queues. 1155 */ 1156 owp = NULL; 1157 mutex_enter(&nfsd_lock); 1158 wp = LIST_FIRST(&slp->ns_tq); 1159 while (wp && wp->nd_time < nfsd->nd_time) { 1160 owp = wp; 1161 wp = LIST_NEXT(wp, nd_tq); 1162 } 1163 if (owp) { 1164 LIST_INSERT_AFTER(owp, nfsd, nd_tq); 1165 } else { 1166 LIST_INSERT_HEAD(&slp->ns_tq, nfsd, nd_tq); 1167 } 1168 if (nfsd->nd_mrep) { 1169 wpp = nfsrv_nwdelayhash(slp, &nfsd->nd_fh); 1170 owp = NULL; 1171 wp = LIST_FIRST(wpp); 1172 while (wp && nfsrv_comparefh(&nfsd->nd_fh, &wp->nd_fh)) { 1173 owp = wp; 1174 wp = LIST_NEXT(wp, nd_hash); 1175 } 1176 while (wp && wp->nd_off < nfsd->nd_off && 1177 !nfsrv_comparefh(&nfsd->nd_fh, &wp->nd_fh)) { 1178 owp = wp; 1179 wp = LIST_NEXT(wp, nd_hash); 1180 } 1181 if (owp) { 1182 LIST_INSERT_AFTER(owp, nfsd, nd_hash); 1183 1184 /* 1185 * Search the hash list for overlapping entries and 1186 * coalesce. 1187 */ 1188 for(; nfsd && NFSW_CONTIG(owp, nfsd); nfsd = wp) { 1189 wp = LIST_NEXT(nfsd, nd_hash); 1190 if (nfsrv_samecred(owp->nd_cr, nfsd->nd_cr)) 1191 nfsrvw_coalesce(owp, nfsd); 1192 } 1193 } else { 1194 LIST_INSERT_HEAD(wpp, nfsd, nd_hash); 1195 } 1196 } 1197 mutex_exit(&nfsd_lock); 1198 } 1199 1200 /* 1201 * Now, do VOP_WRITE()s for any one(s) that need to be done now 1202 * and generate the associated reply mbuf list(s). 1203 */ 1204 loop1: 1205 getmicrotime(&now); 1206 cur_usec = (u_quad_t)now.tv_sec * 1000000 + (u_quad_t)now.tv_usec; 1207 mutex_enter(&nfsd_lock); 1208 for (nfsd = LIST_FIRST(&slp->ns_tq); nfsd; nfsd = owp) { 1209 owp = LIST_NEXT(nfsd, nd_tq); 1210 if (nfsd->nd_time > cur_usec) 1211 break; 1212 if (nfsd->nd_mreq) 1213 continue; 1214 LIST_REMOVE(nfsd, nd_tq); 1215 LIST_REMOVE(nfsd, nd_hash); 1216 mutex_exit(&nfsd_lock); 1217 1218 mrep = nfsd->nd_mrep; 1219 nfsd->nd_mrep = NULL; 1220 cred = nfsd->nd_cr; 1221 v3 = (nfsd->nd_flag & ND_NFSV3); 1222 forat_ret = aftat_ret = 1; 1223 error = nfsrv_fhtovp(&nfsd->nd_fh, 1, &vp, cred, slp, 1224 nfsd->nd_nam, &rdonly, (nfsd->nd_flag & ND_KERBAUTH), 1225 false); 1226 if (!error) { 1227 if (v3) 1228 forat_ret = VOP_GETATTR(vp, &forat, cred); 1229 if (vp->v_type != VREG) { 1230 if (v3) 1231 error = EINVAL; 1232 else 1233 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 1234 } 1235 } else 1236 vp = NULL; 1237 if (!error) { 1238 nqsrv_getl(vp, ND_WRITE); 1239 error = nfsrv_access(vp, VWRITE, cred, rdonly, lwp, 1); 1240 } 1241 1242 if (nfsd->nd_stable == NFSV3WRITE_UNSTABLE) 1243 ioflags = IO_NODELOCKED; 1244 else if (nfsd->nd_stable == NFSV3WRITE_DATASYNC) 1245 ioflags = (IO_SYNC | IO_NODELOCKED); 1246 else 1247 ioflags = (IO_METASYNC | IO_SYNC | IO_NODELOCKED); 1248 uiop->uio_rw = UIO_WRITE; 1249 uiop->uio_offset = nfsd->nd_off; 1250 uiop->uio_resid = nfsd->nd_eoff - nfsd->nd_off; 1251 UIO_SETUP_SYSSPACE(uiop); 1252 if (uiop->uio_resid > 0) { 1253 mp = mrep; 1254 i = 0; 1255 while (mp) { 1256 if (mp->m_len > 0) 1257 i++; 1258 mp = mp->m_next; 1259 } 1260 uiop->uio_iovcnt = i; 1261 iov = malloc(i * sizeof (struct iovec), M_TEMP, M_WAITOK); 1262 uiop->uio_iov = ivp = iov; 1263 mp = mrep; 1264 while (mp) { 1265 if (mp->m_len > 0) { 1266 ivp->iov_base = mtod(mp, void *); 1267 ivp->iov_len = mp->m_len; 1268 ivp++; 1269 } 1270 mp = mp->m_next; 1271 } 1272 if (!error) { 1273 error = VOP_WRITE(vp, uiop, ioflags, cred); 1274 nfsstats.srvvop_writes++; 1275 } 1276 free((void *)iov, M_TEMP); 1277 } 1278 m_freem(mrep); 1279 if (vp) { 1280 aftat_ret = VOP_GETATTR(vp, &va, cred); 1281 vput(vp); 1282 } 1283 1284 /* 1285 * Loop around generating replies for all write rpcs that have 1286 * now been completed. 1287 */ 1288 swp = nfsd; 1289 do { 1290 if (error) { 1291 nfsm_writereply(NFSX_WCCDATA(v3), v3); 1292 if (v3) { 1293 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1294 } 1295 } else { 1296 nfsm_writereply(NFSX_PREOPATTR(v3) + 1297 NFSX_POSTOPORFATTR(v3) + 2 * NFSX_UNSIGNED + 1298 NFSX_WRITEVERF(v3), v3); 1299 if (v3) { 1300 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1301 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1302 *tl++ = txdr_unsigned(nfsd->nd_len); 1303 *tl++ = txdr_unsigned(swp->nd_stable); 1304 /* 1305 * Actually, there is no need to txdr these fields, 1306 * but it may make the values more human readable, 1307 * for debugging purposes. 1308 */ 1309 struct timeval btv; 1310 getmicroboottime(&btv); 1311 *tl++ = txdr_unsigned(btv.tv_sec); 1312 *tl = txdr_unsigned(btv.tv_usec); 1313 } else { 1314 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 1315 nfsm_srvfillattr(&va, fp); 1316 } 1317 } 1318 nfsd->nd_mreq = mreq; 1319 if (nfsd->nd_mrep) 1320 panic("nfsrv_write: nd_mrep not free"); 1321 1322 /* 1323 * Done. Put it at the head of the timer queue so that 1324 * the final phase can return the reply. 1325 */ 1326 mutex_enter(&nfsd_lock); 1327 if (nfsd != swp) { 1328 nfsd->nd_time = 0; 1329 LIST_INSERT_HEAD(&slp->ns_tq, nfsd, nd_tq); 1330 } 1331 nfsd = LIST_FIRST(&swp->nd_coalesce); 1332 if (nfsd) { 1333 LIST_REMOVE(nfsd, nd_tq); 1334 } 1335 mutex_exit(&nfsd_lock); 1336 } while (nfsd); 1337 swp->nd_time = 0; 1338 1339 mutex_enter(&nfsd_lock); 1340 LIST_INSERT_HEAD(&slp->ns_tq, swp, nd_tq); 1341 mutex_exit(&nfsd_lock); 1342 goto loop1; 1343 } 1344 mutex_exit(&nfsd_lock); 1345 nfs_timer_start(); 1346 1347 /* 1348 * Search for a reply to return. 1349 */ 1350 mutex_enter(&nfsd_lock); 1351 LIST_FOREACH(nfsd, &slp->ns_tq, nd_tq) { 1352 if (nfsd->nd_mreq) { 1353 LIST_REMOVE(nfsd, nd_tq); 1354 *mrq = nfsd->nd_mreq; 1355 *ndp = nfsd; 1356 break; 1357 } 1358 } 1359 mutex_exit(&nfsd_lock); 1360 return (0); 1361 } 1362 1363 /* 1364 * Coalesce the write request nfsd into owp. To do this we must: 1365 * - remove nfsd from the queues 1366 * - merge nfsd->nd_mrep into owp->nd_mrep 1367 * - update the nd_eoff and nd_stable for owp 1368 * - put nfsd on owp's nd_coalesce list 1369 * NB: Must be called at splsoftclock(). 1370 */ 1371 void 1372 nfsrvw_coalesce(struct nfsrv_descript *owp, struct nfsrv_descript *nfsd) 1373 { 1374 int overlap; 1375 struct mbuf *mp; 1376 struct nfsrv_descript *m; 1377 1378 KASSERT(mutex_owned(&nfsd_lock)); 1379 1380 LIST_REMOVE(nfsd, nd_hash); 1381 LIST_REMOVE(nfsd, nd_tq); 1382 if (owp->nd_eoff < nfsd->nd_eoff) { 1383 overlap = owp->nd_eoff - nfsd->nd_off; 1384 if (overlap < 0) 1385 panic("nfsrv_coalesce: bad off"); 1386 if (overlap > 0) 1387 m_adj(nfsd->nd_mrep, overlap); 1388 mp = owp->nd_mrep; 1389 while (mp->m_next) 1390 mp = mp->m_next; 1391 mp->m_next = nfsd->nd_mrep; 1392 owp->nd_eoff = nfsd->nd_eoff; 1393 } else 1394 m_freem(nfsd->nd_mrep); 1395 nfsd->nd_mrep = NULL; 1396 if (nfsd->nd_stable == NFSV3WRITE_FILESYNC) 1397 owp->nd_stable = NFSV3WRITE_FILESYNC; 1398 else if (nfsd->nd_stable == NFSV3WRITE_DATASYNC && 1399 owp->nd_stable == NFSV3WRITE_UNSTABLE) 1400 owp->nd_stable = NFSV3WRITE_DATASYNC; 1401 LIST_INSERT_HEAD(&owp->nd_coalesce, nfsd, nd_tq); 1402 /* 1403 * nfsd might hold coalesce elements! Move them to owp. 1404 * Otherwise, requests may be lost and clients will be stuck. 1405 */ 1406 while ((m = LIST_FIRST(&nfsd->nd_coalesce)) != NULL) { 1407 LIST_REMOVE(m, nd_tq); 1408 LIST_INSERT_HEAD(&owp->nd_coalesce, m, nd_tq); 1409 } 1410 } 1411 1412 /* 1413 * nfs create service 1414 * now does a truncate to 0 length via. setattr if it already exists 1415 */ 1416 int 1417 nfsrv_create(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 1418 { 1419 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1420 struct mbuf *nam = nfsd->nd_nam; 1421 char *dpos = nfsd->nd_dpos; 1422 kauth_cred_t cred = nfsd->nd_cr; 1423 struct nfs_fattr *fp; 1424 struct vattr va, dirfor, diraft; 1425 struct nfsv2_sattr *sp; 1426 u_int32_t *tl; 1427 struct nameidata nd; 1428 char *cp; 1429 int32_t t1; 1430 char *bpos; 1431 int error = 0, cache = 0, len, tsize, dirfor_ret = 1, diraft_ret = 1; 1432 int rdev = 0, abort = 0; 1433 int v3 = (nfsd->nd_flag & ND_NFSV3), how, exclusive_flag = 0; 1434 char *cp2; 1435 struct mbuf *mb, *mreq __unused; 1436 struct vnode *vp = NULL, *dirp = NULL; 1437 nfsrvfh_t nsfh; 1438 u_quad_t frev, tempsize; 1439 u_char cverf[NFSX_V3CREATEVERF]; 1440 1441 nd.ni_cnd.cn_nameiop = 0; 1442 nfsm_srvmtofh(&nsfh); 1443 nfsm_srvnamesiz(len); 1444 nd.ni_cnd.cn_cred = cred; 1445 nd.ni_cnd.cn_nameiop = CREATE; 1446 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 1447 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 1448 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 1449 if (dirp && v3) { 1450 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); 1451 } 1452 if (error) { 1453 nfsm_reply(NFSX_WCCDATA(v3)); 1454 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1455 if (dirp) 1456 vrele(dirp); 1457 if (nd.ni_pathbuf != NULL) { 1458 pathbuf_destroy(nd.ni_pathbuf); 1459 nd.ni_pathbuf = NULL; 1460 } 1461 return (0); 1462 } 1463 abort = 1; 1464 vattr_null(&va); 1465 if (v3) { 1466 va.va_mode = 0; 1467 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1468 how = fxdr_unsigned(int, *tl); 1469 switch (how) { 1470 case NFSV3CREATE_GUARDED: 1471 if (nd.ni_vp) { 1472 error = EEXIST; 1473 break; 1474 } 1475 /* FALLTHROUGH */ 1476 case NFSV3CREATE_UNCHECKED: 1477 nfsm_srvsattr(&va); 1478 break; 1479 case NFSV3CREATE_EXCLUSIVE: 1480 nfsm_dissect(cp, void *, NFSX_V3CREATEVERF); 1481 memcpy(cverf, cp, NFSX_V3CREATEVERF); 1482 exclusive_flag = 1; 1483 break; 1484 }; 1485 va.va_type = VREG; 1486 } else { 1487 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1488 va.va_type = IFTOVT(fxdr_unsigned(u_int32_t, sp->sa_mode)); 1489 if (va.va_type == VNON) 1490 va.va_type = VREG; 1491 va.va_mode = nfstov_mode(sp->sa_mode); 1492 switch (va.va_type) { 1493 case VREG: 1494 tsize = fxdr_unsigned(int32_t, sp->sa_size); 1495 if (tsize != -1) 1496 va.va_size = (u_quad_t)tsize; 1497 break; 1498 case VCHR: 1499 case VBLK: 1500 case VFIFO: 1501 rdev = fxdr_unsigned(int32_t, sp->sa_size); 1502 break; 1503 default: 1504 break; 1505 }; 1506 } 1507 1508 /* 1509 * Iff doesn't exist, create it 1510 * otherwise just truncate to 0 length 1511 * should I set the mode too ?? 1512 */ 1513 if (nd.ni_vp == NULL) { 1514 if (va.va_type == VREG || va.va_type == VSOCK) { 1515 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1516 error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1517 if (!error) { 1518 vn_lock(nd.ni_vp, LK_EXCLUSIVE | LK_RETRY); 1519 if (exclusive_flag) { 1520 exclusive_flag = 0; 1521 vattr_null(&va); 1522 /* 1523 * XXX 1524 * assuming NFSX_V3CREATEVERF 1525 * == sizeof(nfstime3) 1526 */ 1527 fxdr_nfsv3time(cverf, &va.va_atime); 1528 error = VOP_SETATTR(nd.ni_vp, &va, 1529 cred); 1530 } 1531 } 1532 } else if (va.va_type == VCHR || va.va_type == VBLK || 1533 va.va_type == VFIFO) { 1534 if (va.va_type == VCHR && rdev == 0xffffffff) 1535 va.va_type = VFIFO; 1536 if (va.va_type != VFIFO && 1537 (error = kauth_authorize_system(cred, 1538 KAUTH_SYSTEM_MKNOD, 0, NULL, NULL, NULL))) { 1539 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1540 vput(nd.ni_dvp); 1541 abort = 0; 1542 nfsm_reply(0); 1543 if (nd.ni_pathbuf != NULL) { 1544 pathbuf_destroy(nd.ni_pathbuf); 1545 nd.ni_pathbuf = NULL; 1546 } 1547 return (error); 1548 } else 1549 va.va_rdev = (dev_t)rdev; 1550 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1551 error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, 1552 &va); 1553 if (!error) { 1554 vn_lock(nd.ni_vp, LK_EXCLUSIVE | LK_RETRY); 1555 } else { 1556 nfsm_reply(0); 1557 } 1558 } else { 1559 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1560 if (nd.ni_pathbuf != NULL) { 1561 pathbuf_destroy(nd.ni_pathbuf); 1562 nd.ni_pathbuf = NULL; 1563 } 1564 error = ENXIO; 1565 abort = 0; 1566 } 1567 vp = nd.ni_vp; 1568 } else { 1569 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1570 if (nd.ni_pathbuf != NULL) { 1571 pathbuf_destroy(nd.ni_pathbuf); 1572 nd.ni_pathbuf = NULL; 1573 } 1574 vp = nd.ni_vp; 1575 abort = 0; 1576 if (!error && va.va_size != -1) { 1577 error = nfsrv_access(vp, VWRITE, cred, 1578 (nd.ni_cnd.cn_flags & RDONLY), lwp, 0); 1579 if (!error) { 1580 nqsrv_getl(vp, ND_WRITE); 1581 tempsize = va.va_size; 1582 vattr_null(&va); 1583 va.va_size = tempsize; 1584 error = VOP_SETATTR(vp, &va, cred); 1585 } 1586 } 1587 if (error) 1588 vput(vp); 1589 } 1590 if (!error) { 1591 error = nfsrv_composefh(vp, &nsfh, v3); 1592 if (!error) 1593 error = VOP_GETATTR(vp, &va, cred); 1594 vput(vp); 1595 } 1596 if (nd.ni_dvp == vp) 1597 vrele(nd.ni_dvp); 1598 else 1599 vput(nd.ni_dvp); 1600 if (v3) { 1601 if (exclusive_flag && !error) { 1602 /* 1603 * XXX assuming NFSX_V3CREATEVERF == sizeof(nfstime3) 1604 */ 1605 char oldverf[NFSX_V3CREATEVERF]; 1606 1607 txdr_nfsv3time(&va.va_atime, oldverf); 1608 if (memcmp(cverf, oldverf, NFSX_V3CREATEVERF)) 1609 error = EEXIST; 1610 } 1611 if (dirp) { 1612 vn_lock(dirp, LK_SHARED | LK_RETRY); 1613 diraft_ret = VOP_GETATTR(dirp, &diraft, cred); 1614 VOP_UNLOCK(dirp); 1615 } 1616 } 1617 if (dirp) { 1618 vrele(dirp); 1619 dirp = NULL; 1620 } 1621 if (nd.ni_pathbuf != NULL) { 1622 pathbuf_destroy(nd.ni_pathbuf); 1623 nd.ni_pathbuf = NULL; 1624 } 1625 abort = 0; 1626 nfsm_reply(NFSX_SRVFH(&nsfh, v3) + NFSX_FATTR(v3) + NFSX_WCCDATA(v3)); 1627 if (v3) { 1628 if (!error) { 1629 nfsm_srvpostop_fh(&nsfh); 1630 nfsm_srvpostop_attr(0, &va); 1631 } 1632 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1633 } else { 1634 nfsm_srvfhtom(&nsfh, v3); 1635 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 1636 nfsm_srvfillattr(&va, fp); 1637 } 1638 return (0); 1639 nfsmout: 1640 if (dirp) 1641 vrele(dirp); 1642 if (abort) { 1643 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1644 if (nd.ni_dvp == nd.ni_vp) 1645 vrele(nd.ni_dvp); 1646 else 1647 vput(nd.ni_dvp); 1648 if (nd.ni_vp) 1649 vput(nd.ni_vp); 1650 } 1651 if (nd.ni_pathbuf != NULL) { 1652 pathbuf_destroy(nd.ni_pathbuf); 1653 nd.ni_pathbuf = NULL; 1654 } 1655 return (error); 1656 } 1657 1658 /* 1659 * nfs v3 mknod service 1660 */ 1661 int 1662 nfsrv_mknod(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 1663 { 1664 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1665 struct mbuf *nam = nfsd->nd_nam; 1666 char *dpos = nfsd->nd_dpos; 1667 kauth_cred_t cred = nfsd->nd_cr; 1668 struct vattr va, dirfor, diraft; 1669 u_int32_t *tl; 1670 struct nameidata nd; 1671 int32_t t1; 1672 char *bpos; 1673 int error = 0, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 1674 int abort = 0; 1675 u_int32_t major, minor; 1676 enum vtype vtyp; 1677 char *cp2; 1678 struct mbuf *mb, *mreq __unused; 1679 struct vnode *vp, *dirp = (struct vnode *)0; 1680 nfsrvfh_t nsfh; 1681 u_quad_t frev; 1682 1683 nd.ni_cnd.cn_nameiop = 0; 1684 nfsm_srvmtofh(&nsfh); 1685 nfsm_srvnamesiz(len); 1686 nd.ni_cnd.cn_cred = cred; 1687 nd.ni_cnd.cn_nameiop = CREATE; 1688 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 1689 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 1690 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 1691 if (dirp) 1692 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); 1693 if (error) { 1694 nfsm_reply(NFSX_WCCDATA(1)); 1695 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1696 if (dirp) 1697 vrele(dirp); 1698 if (nd.ni_pathbuf != NULL) { 1699 pathbuf_destroy(nd.ni_pathbuf); 1700 nd.ni_pathbuf = NULL; 1701 } 1702 return (0); 1703 } 1704 abort = 1; 1705 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1706 vtyp = nfsv3tov_type(*tl); 1707 if (vtyp != VCHR && vtyp != VBLK && vtyp != VSOCK && vtyp != VFIFO) { 1708 error = NFSERR_BADTYPE; 1709 goto abort; 1710 } 1711 vattr_null(&va); 1712 va.va_mode = 0; 1713 nfsm_srvsattr(&va); 1714 if (vtyp == VCHR || vtyp == VBLK) { 1715 dev_t rdev; 1716 1717 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1718 major = fxdr_unsigned(u_int32_t, *tl++); 1719 minor = fxdr_unsigned(u_int32_t, *tl); 1720 rdev = makedev(major, minor); 1721 if (major(rdev) != major || minor(rdev) != minor) { 1722 error = EINVAL; 1723 goto abort; 1724 } 1725 va.va_rdev = rdev; 1726 } 1727 1728 /* 1729 * Iff doesn't exist, create it. 1730 */ 1731 if (nd.ni_vp) { 1732 error = EEXIST; 1733 abort: 1734 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1735 if (nd.ni_vp) 1736 vput(nd.ni_vp); 1737 if (nd.ni_pathbuf != NULL) { 1738 pathbuf_destroy(nd.ni_pathbuf); 1739 nd.ni_pathbuf = NULL; 1740 } 1741 goto out; 1742 } 1743 va.va_type = vtyp; 1744 if (vtyp == VSOCK) { 1745 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1746 error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1747 } else { 1748 if (va.va_type != VFIFO && 1749 (error = kauth_authorize_system(cred, 1750 KAUTH_SYSTEM_MKNOD, 0, NULL, NULL, NULL))) { 1751 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1752 vput(nd.ni_dvp); 1753 goto out; 1754 } 1755 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1756 error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1757 if (error) 1758 goto out; 1759 } 1760 if (!error) { 1761 vn_lock(nd.ni_vp, LK_EXCLUSIVE | LK_RETRY); 1762 } 1763 out: 1764 vp = nd.ni_vp; 1765 if (!error) { 1766 error = nfsrv_composefh(vp, &nsfh, true); 1767 if (!error) 1768 error = VOP_GETATTR(vp, &va, cred); 1769 vput(vp); 1770 } 1771 if (nd.ni_dvp == nd.ni_vp) 1772 vrele(nd.ni_dvp); 1773 else 1774 vput(nd.ni_dvp); 1775 if (dirp) { 1776 vn_lock(dirp, LK_SHARED | LK_RETRY); 1777 diraft_ret = VOP_GETATTR(dirp, &diraft, cred); 1778 VOP_UNLOCK(dirp); 1779 vrele(dirp); 1780 dirp = NULL; 1781 } 1782 if (nd.ni_pathbuf != NULL) { 1783 pathbuf_destroy(nd.ni_pathbuf); 1784 nd.ni_pathbuf = NULL; 1785 } 1786 abort = 0; 1787 nfsm_reply(NFSX_SRVFH(&nsfh, true) + NFSX_POSTOPATTR(1) + 1788 NFSX_WCCDATA(1)); 1789 if (!error) { 1790 nfsm_srvpostop_fh(&nsfh); 1791 nfsm_srvpostop_attr(0, &va); 1792 } 1793 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1794 return (0); 1795 nfsmout: 1796 if (abort) { 1797 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1798 if (nd.ni_dvp == nd.ni_vp) 1799 vrele(nd.ni_dvp); 1800 else 1801 vput(nd.ni_dvp); 1802 if (nd.ni_vp) 1803 vput(nd.ni_vp); 1804 } 1805 if (nd.ni_pathbuf != NULL) { 1806 pathbuf_destroy(nd.ni_pathbuf); 1807 nd.ni_pathbuf = NULL; 1808 } 1809 if (dirp) 1810 vrele(dirp); 1811 return (error); 1812 } 1813 1814 /* 1815 * nfs remove service 1816 */ 1817 int 1818 nfsrv_remove(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 1819 { 1820 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1821 struct mbuf *nam = nfsd->nd_nam; 1822 char *dpos = nfsd->nd_dpos; 1823 kauth_cred_t cred = nfsd->nd_cr; 1824 struct nameidata nd; 1825 u_int32_t *tl; 1826 int32_t t1; 1827 char *bpos; 1828 int error = 0, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 1829 int v3 = (nfsd->nd_flag & ND_NFSV3); 1830 char *cp2; 1831 struct mbuf *mb, *mreq __unused; 1832 struct vnode *vp, *dirp; 1833 struct vattr dirfor, diraft; 1834 nfsrvfh_t nsfh; 1835 u_quad_t frev; 1836 1837 #ifndef nolint 1838 vp = (struct vnode *)0; 1839 #endif 1840 nfsm_srvmtofh(&nsfh); 1841 nfsm_srvnamesiz(len); 1842 nd.ni_cnd.cn_cred = cred; 1843 nd.ni_cnd.cn_nameiop = DELETE; 1844 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 1845 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 1846 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 1847 if (error == 0 && dirp && v3) { 1848 if (nd.ni_dvp == nd.ni_vp) 1849 vn_lock(dirp, LK_SHARED | LK_RETRY); 1850 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); 1851 if (nd.ni_dvp == nd.ni_vp) 1852 VOP_UNLOCK(dirp); 1853 } 1854 if (!error) { 1855 vp = nd.ni_vp; 1856 if (vp->v_type == VDIR) { 1857 error = EPERM; 1858 goto out; 1859 } 1860 /* 1861 * The root of a mounted filesystem cannot be deleted. 1862 */ 1863 if (vp->v_vflag & VV_ROOT) { 1864 error = EBUSY; 1865 } 1866 out: 1867 if (!error) { 1868 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1869 nqsrv_getl(vp, ND_WRITE); 1870 error = VOP_REMOVE(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); 1871 vput(nd.ni_dvp); 1872 } else { 1873 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1874 if (nd.ni_dvp == vp) 1875 vrele(nd.ni_dvp); 1876 else 1877 vput(nd.ni_dvp); 1878 vput(vp); 1879 } 1880 } 1881 if (nd.ni_pathbuf != NULL) { 1882 pathbuf_destroy(nd.ni_pathbuf); 1883 nd.ni_pathbuf = NULL; 1884 } 1885 if (dirp) { 1886 if (v3) { 1887 vn_lock(dirp, LK_SHARED | LK_RETRY); 1888 diraft_ret = VOP_GETATTR(dirp, &diraft, cred); 1889 VOP_UNLOCK(dirp); 1890 } 1891 vrele(dirp); 1892 } 1893 nfsm_reply(NFSX_WCCDATA(v3)); 1894 if (v3) { 1895 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1896 return (0); 1897 } 1898 nfsm_srvdone; 1899 } 1900 1901 /* 1902 * nfs rename service 1903 */ 1904 int 1905 nfsrv_rename(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 1906 { 1907 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1908 struct mbuf *nam = nfsd->nd_nam; 1909 char *dpos = nfsd->nd_dpos; 1910 kauth_cred_t cred = nfsd->nd_cr; 1911 u_int32_t *tl; 1912 int32_t t1; 1913 char *bpos; 1914 int error = 0, cache = 0, fdirfor_ret = 1, fdiraft_ret = 1; 1915 uint32_t len, len2; 1916 int tdirfor_ret = 1, tdiraft_ret = 1; 1917 int v3 = (nfsd->nd_flag & ND_NFSV3); 1918 char *cp2; 1919 struct mbuf *mb, *mreq __unused; 1920 struct nameidata fromnd, tond; 1921 struct vnode *fvp, *tvp, *tdvp; 1922 struct vnode *fdirp = NULL, *tdirp = NULL; 1923 struct mount *localfs = NULL; 1924 struct vattr fdirfor, fdiraft, tdirfor, tdiraft; 1925 nfsrvfh_t fnsfh, tnsfh; 1926 u_quad_t frev; 1927 uid_t saved_uid; 1928 1929 #ifndef nolint 1930 fvp = (struct vnode *)0; 1931 #endif 1932 fromnd.ni_cnd.cn_nameiop = 0; 1933 tond.ni_cnd.cn_nameiop = 0; 1934 nfsm_srvmtofh(&fnsfh); 1935 nfsm_srvnamesiz(len); 1936 /* 1937 * Remember our original uid so that we can reset cr_uid before 1938 * the second nfs_namei() call, in case it is remapped. 1939 */ 1940 saved_uid = kauth_cred_geteuid(cred); 1941 fromnd.ni_cnd.cn_cred = cred; 1942 fromnd.ni_cnd.cn_nameiop = DELETE; 1943 fromnd.ni_cnd.cn_flags = LOCKPARENT; 1944 error = nfs_namei(&fromnd, &fnsfh, len, slp, nam, &md, 1945 &dpos, &fdirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 1946 if (error == 0 && fdirp && v3) { 1947 if (fromnd.ni_dvp == fromnd.ni_vp) 1948 vn_lock(fdirp, LK_SHARED | LK_RETRY); 1949 fdirfor_ret = VOP_GETATTR(fdirp, &fdirfor, cred); 1950 if (fromnd.ni_dvp == fromnd.ni_vp) 1951 VOP_UNLOCK(fdirp); 1952 } 1953 if (error) { 1954 fromnd.ni_cnd.cn_nameiop = 0; 1955 nfsm_reply(2 * NFSX_WCCDATA(v3)); 1956 nfsm_srvwcc_data(fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft); 1957 nfsm_srvwcc_data(tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft); 1958 if (fdirp) 1959 vrele(fdirp); 1960 if (fromnd.ni_pathbuf != NULL) { 1961 pathbuf_destroy(fromnd.ni_pathbuf); 1962 } 1963 return (0); 1964 } 1965 localfs = fromnd.ni_dvp->v_mount; 1966 fstrans_start(localfs); 1967 if (fromnd.ni_dvp != fromnd.ni_vp) { 1968 VOP_UNLOCK(fromnd.ni_dvp); 1969 } 1970 fvp = fromnd.ni_vp; 1971 1972 error = VFS_RENAMELOCK_ENTER(localfs); 1973 if (error) { 1974 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 1975 vrele(fromnd.ni_dvp); 1976 vrele(fvp); 1977 goto out1; 1978 } 1979 1980 /* Copied, regrettably, from vfs_syscalls.c (q.v.) */ 1981 vrele(fvp); 1982 if ((fromnd.ni_cnd.cn_namelen == 1 && 1983 fromnd.ni_cnd.cn_nameptr[0] == '.') || 1984 (fromnd.ni_cnd.cn_namelen == 2 && 1985 fromnd.ni_cnd.cn_nameptr[0] == '.' && 1986 fromnd.ni_cnd.cn_nameptr[1] == '.')) { 1987 error = EINVAL; 1988 VFS_RENAMELOCK_EXIT(localfs); 1989 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 1990 vrele(fromnd.ni_dvp); 1991 goto out1; 1992 } 1993 vn_lock(fromnd.ni_dvp, LK_EXCLUSIVE | LK_RETRY); 1994 error = relookup(fromnd.ni_dvp, &fromnd.ni_vp, &fromnd.ni_cnd, 0); 1995 if (error) { 1996 VOP_UNLOCK(fromnd.ni_dvp); 1997 VFS_RENAMELOCK_EXIT(localfs); 1998 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 1999 vrele(fromnd.ni_dvp); 2000 goto out1; 2001 } 2002 VOP_UNLOCK(fromnd.ni_vp); 2003 if (fromnd.ni_dvp != fromnd.ni_vp) 2004 VOP_UNLOCK(fromnd.ni_dvp); 2005 fvp = fromnd.ni_vp; 2006 2007 nfsm_srvmtofh(&tnsfh); 2008 if (v3) { 2009 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 2010 len2 = fxdr_unsigned(uint32_t, *tl); 2011 /* len2 will be checked by nfs_namei */ 2012 } 2013 else { 2014 /* NFSv2 */ 2015 nfsm_strsiz(len2, NFS_MAXNAMLEN); 2016 } 2017 kauth_cred_seteuid(cred, saved_uid); 2018 tond.ni_cnd.cn_cred = cred; 2019 tond.ni_cnd.cn_nameiop = RENAME; 2020 tond.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF | NOCACHE; 2021 error = nfs_namei(&tond, &tnsfh, len2, slp, nam, &md, 2022 &dpos, &tdirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 2023 if (tdirp && v3) { 2024 tdirfor_ret = VOP_GETATTR(tdirp, &tdirfor, cred); 2025 } 2026 if (error) { 2027 VFS_RENAMELOCK_EXIT(localfs); 2028 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 2029 vrele(fromnd.ni_dvp); 2030 vrele(fvp); 2031 goto out1; 2032 } 2033 tdvp = tond.ni_dvp; 2034 tvp = tond.ni_vp; 2035 if (tvp != NULL) { 2036 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 2037 if (v3) 2038 error = EEXIST; 2039 else 2040 error = EISDIR; 2041 goto out; 2042 } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 2043 if (v3) 2044 error = EEXIST; 2045 else 2046 error = ENOTDIR; 2047 goto out; 2048 } 2049 if (tvp->v_type == VDIR && tvp->v_mountedhere) { 2050 if (v3) 2051 error = EXDEV; 2052 else 2053 error = ENOTEMPTY; 2054 goto out; 2055 } 2056 } 2057 if (fvp->v_type == VDIR && fvp->v_mountedhere) { 2058 if (v3) 2059 error = EXDEV; 2060 else 2061 error = ENOTEMPTY; 2062 goto out; 2063 } 2064 if (fvp->v_mount != tdvp->v_mount) { 2065 if (v3) 2066 error = EXDEV; 2067 else 2068 error = ENOTEMPTY; 2069 goto out; 2070 } 2071 if (fvp == tdvp) { 2072 if (v3) 2073 error = EINVAL; 2074 else 2075 error = ENOTEMPTY; 2076 } 2077 /* 2078 * If source is the same as the destination (that is the 2079 * same vnode with the same name in the same directory), 2080 * then there is nothing to do. 2081 */ 2082 if (fvp == tvp && fromnd.ni_dvp == tdvp && 2083 fromnd.ni_cnd.cn_namelen == tond.ni_cnd.cn_namelen && 2084 !memcmp(fromnd.ni_cnd.cn_nameptr, tond.ni_cnd.cn_nameptr, 2085 fromnd.ni_cnd.cn_namelen)) 2086 error = -1; 2087 out: 2088 if (!error) { 2089 nqsrv_getl(fromnd.ni_dvp, ND_WRITE); 2090 nqsrv_getl(tdvp, ND_WRITE); 2091 if (tvp) { 2092 nqsrv_getl(tvp, ND_WRITE); 2093 } 2094 error = VOP_RENAME(fromnd.ni_dvp, fromnd.ni_vp, &fromnd.ni_cnd, 2095 tond.ni_dvp, tond.ni_vp, &tond.ni_cnd); 2096 VFS_RENAMELOCK_EXIT(localfs); 2097 } else { 2098 VOP_ABORTOP(tond.ni_dvp, &tond.ni_cnd); 2099 if (tdvp == tvp) 2100 vrele(tdvp); 2101 else 2102 vput(tdvp); 2103 if (tvp) 2104 vput(tvp); 2105 VFS_RENAMELOCK_EXIT(localfs); 2106 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 2107 vrele(fromnd.ni_dvp); 2108 vrele(fvp); 2109 if (error == -1) 2110 error = 0; 2111 } 2112 if (tond.ni_pathbuf != NULL) { 2113 pathbuf_destroy(tond.ni_pathbuf); 2114 tond.ni_pathbuf = NULL; 2115 } 2116 tond.ni_cnd.cn_nameiop = 0; 2117 out1: 2118 if (fdirp) { 2119 if (v3) { 2120 vn_lock(fdirp, LK_SHARED | LK_RETRY); 2121 fdiraft_ret = VOP_GETATTR(fdirp, &fdiraft, cred); 2122 VOP_UNLOCK(fdirp); 2123 } 2124 vrele(fdirp); 2125 fdirp = NULL; 2126 } 2127 if (tdirp) { 2128 if (v3) { 2129 vn_lock(tdirp, LK_SHARED | LK_RETRY); 2130 tdiraft_ret = VOP_GETATTR(tdirp, &tdiraft, cred); 2131 VOP_UNLOCK(tdirp); 2132 } 2133 vrele(tdirp); 2134 tdirp = NULL; 2135 } 2136 pathbuf_destroy(fromnd.ni_pathbuf); 2137 fromnd.ni_pathbuf = NULL; 2138 fromnd.ni_cnd.cn_nameiop = 0; 2139 fstrans_done(localfs); 2140 localfs = NULL; 2141 nfsm_reply(2 * NFSX_WCCDATA(v3)); 2142 if (v3) { 2143 nfsm_srvwcc_data(fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft); 2144 nfsm_srvwcc_data(tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft); 2145 } 2146 return (0); 2147 2148 nfsmout: 2149 if (fdirp) 2150 vrele(fdirp); 2151 #ifdef notdef 2152 if (tdirp) 2153 vrele(tdirp); 2154 #endif 2155 if (tond.ni_cnd.cn_nameiop) { 2156 if (tond.ni_pathbuf != NULL) { 2157 pathbuf_destroy(tond.ni_pathbuf); 2158 tond.ni_pathbuf = NULL; 2159 } 2160 } 2161 if (localfs) { 2162 VFS_RENAMELOCK_EXIT(localfs); 2163 fstrans_done(localfs); 2164 } 2165 if (fromnd.ni_cnd.cn_nameiop) { 2166 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 2167 if (fromnd.ni_pathbuf != NULL) { 2168 pathbuf_destroy(fromnd.ni_pathbuf); 2169 fromnd.ni_pathbuf = NULL; 2170 } 2171 vrele(fromnd.ni_dvp); 2172 vrele(fvp); 2173 } 2174 return (error); 2175 } 2176 2177 /* 2178 * nfs link service 2179 */ 2180 int 2181 nfsrv_link(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 2182 { 2183 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2184 struct mbuf *nam = nfsd->nd_nam; 2185 char *dpos = nfsd->nd_dpos; 2186 kauth_cred_t cred = nfsd->nd_cr; 2187 struct nameidata nd; 2188 u_int32_t *tl; 2189 int32_t t1; 2190 char *bpos; 2191 int error = 0, rdonly, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 2192 int getret = 1, v3 = (nfsd->nd_flag & ND_NFSV3); 2193 char *cp2; 2194 struct mbuf *mb, *mreq __unused; 2195 struct vnode *vp, *xp, *dirp = (struct vnode *)0; 2196 struct vattr dirfor, diraft, at; 2197 nfsrvfh_t nsfh, dnsfh; 2198 u_quad_t frev; 2199 2200 nfsm_srvmtofh(&nsfh); 2201 nfsm_srvmtofh(&dnsfh); 2202 nfsm_srvnamesiz(len); 2203 error = nfsrv_fhtovp(&nsfh, false, &vp, cred, slp, nam, 2204 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 2205 if (error) { 2206 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2207 nfsm_srvpostop_attr(getret, &at); 2208 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2209 return (0); 2210 } 2211 if (vp->v_type == VDIR) { 2212 error = EPERM; 2213 goto out1; 2214 } 2215 nd.ni_cnd.cn_cred = cred; 2216 nd.ni_cnd.cn_nameiop = CREATE; 2217 nd.ni_cnd.cn_flags = LOCKPARENT; 2218 error = nfs_namei(&nd, &dnsfh, len, slp, nam, &md, &dpos, 2219 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 2220 if (dirp && v3) { 2221 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); 2222 } 2223 if (error) 2224 goto out1; 2225 xp = nd.ni_vp; 2226 if (xp != NULL) { 2227 error = EEXIST; 2228 goto out; 2229 } 2230 xp = nd.ni_dvp; 2231 if (vp->v_mount != xp->v_mount) 2232 error = EXDEV; 2233 out: 2234 if (!error) { 2235 nqsrv_getl(vp, ND_WRITE); 2236 nqsrv_getl(xp, ND_WRITE); 2237 error = VOP_LINK(nd.ni_dvp, vp, &nd.ni_cnd); 2238 if (nd.ni_dvp != nd.ni_vp) 2239 VOP_UNLOCK(nd.ni_dvp); 2240 vrele(nd.ni_dvp); 2241 } else { 2242 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2243 if (nd.ni_dvp == nd.ni_vp) 2244 vrele(nd.ni_dvp); 2245 else 2246 vput(nd.ni_dvp); 2247 if (nd.ni_vp) 2248 vrele(nd.ni_vp); 2249 } 2250 out1: 2251 if (v3) { 2252 vn_lock(vp, LK_SHARED | LK_RETRY); 2253 getret = VOP_GETATTR(vp, &at, cred); 2254 VOP_UNLOCK(vp); 2255 } 2256 if (dirp) { 2257 if (v3) { 2258 vn_lock(dirp, LK_SHARED | LK_RETRY); 2259 diraft_ret = VOP_GETATTR(dirp, &diraft, cred); 2260 VOP_UNLOCK(dirp); 2261 } 2262 vrele(dirp); 2263 } 2264 vrele(vp); 2265 if (nd.ni_pathbuf != NULL) { 2266 pathbuf_destroy(nd.ni_pathbuf); 2267 nd.ni_pathbuf = NULL; 2268 } 2269 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2270 if (v3) { 2271 nfsm_srvpostop_attr(getret, &at); 2272 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2273 return (0); 2274 } 2275 nfsm_srvdone; 2276 } 2277 2278 /* 2279 * nfs symbolic link service 2280 */ 2281 int 2282 nfsrv_symlink(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 2283 { 2284 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2285 struct mbuf *nam = nfsd->nd_nam; 2286 char *dpos = nfsd->nd_dpos; 2287 kauth_cred_t cred = nfsd->nd_cr; 2288 struct vattr va, dirfor, diraft; 2289 struct nameidata nd; 2290 u_int32_t *tl; 2291 int32_t t1; 2292 struct nfsv2_sattr *sp; 2293 char *bpos, *pathcp = NULL, *cp2; 2294 struct uio io; 2295 struct iovec iv; 2296 int error = 0, cache = 0, dirfor_ret = 1, diraft_ret = 1, abort = 0; 2297 uint32_t len, len2; 2298 int v3 = (nfsd->nd_flag & ND_NFSV3); 2299 struct mbuf *mb, *mreq __unused; 2300 struct vnode *dirp = (struct vnode *)0; 2301 nfsrvfh_t nsfh; 2302 u_quad_t frev; 2303 2304 nd.ni_cnd.cn_nameiop = 0; 2305 nfsm_srvmtofh(&nsfh); 2306 nfsm_srvnamesiz(len); 2307 nd.ni_cnd.cn_cred = cred; 2308 nd.ni_cnd.cn_nameiop = CREATE; 2309 nd.ni_cnd.cn_flags = LOCKPARENT; 2310 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 2311 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 2312 if (dirp && v3) { 2313 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); 2314 } 2315 if (error) 2316 goto out; 2317 abort = 1; 2318 vattr_null(&va); 2319 va.va_type = VLNK; 2320 if (v3) { 2321 va.va_mode = 0; 2322 nfsm_srvsattr(&va); 2323 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 2324 len2 = fxdr_unsigned(uint32_t, *tl); 2325 if (len2 > PATH_MAX) { 2326 /* XXX should check _PC_NO_TRUNC */ 2327 error = ENAMETOOLONG; 2328 goto abortop; 2329 } 2330 } 2331 else { 2332 /* NFSv2 */ 2333 nfsm_strsiz(len2, NFS_MAXPATHLEN); 2334 } 2335 pathcp = malloc(len2 + 1, M_TEMP, M_WAITOK); 2336 iv.iov_base = pathcp; 2337 iv.iov_len = len2; 2338 io.uio_resid = len2; 2339 io.uio_offset = 0; 2340 io.uio_iov = &iv; 2341 io.uio_iovcnt = 1; 2342 io.uio_rw = UIO_READ; 2343 UIO_SETUP_SYSSPACE(&io); 2344 nfsm_mtouio(&io, len2); 2345 if (!v3) { 2346 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2347 va.va_mode = fxdr_unsigned(u_int16_t, sp->sa_mode); 2348 } 2349 *(pathcp + len2) = '\0'; 2350 if (nd.ni_vp) { 2351 error = EEXIST; 2352 abortop: 2353 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2354 if (nd.ni_dvp == nd.ni_vp) 2355 vrele(nd.ni_dvp); 2356 else 2357 vput(nd.ni_dvp); 2358 if (nd.ni_vp) 2359 vrele(nd.ni_vp); 2360 goto out; 2361 } 2362 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2363 error = VOP_SYMLINK(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va, pathcp); 2364 if (!error) { 2365 if (v3) { 2366 vn_lock(nd.ni_vp, LK_SHARED | LK_RETRY); 2367 error = nfsrv_composefh(nd.ni_vp, &nsfh, v3); 2368 if (!error) 2369 error = VOP_GETATTR(nd.ni_vp, &va, cred); 2370 vput(nd.ni_vp); 2371 } else { 2372 vrele(nd.ni_vp); 2373 } 2374 } 2375 vput(nd.ni_dvp); 2376 out: 2377 if (pathcp) 2378 free(pathcp, M_TEMP); 2379 if (dirp) { 2380 if (v3) { 2381 vn_lock(dirp, LK_SHARED | LK_RETRY); 2382 diraft_ret = VOP_GETATTR(dirp, &diraft, cred); 2383 VOP_UNLOCK(dirp); 2384 } 2385 vrele(dirp); 2386 dirp = NULL; 2387 } 2388 if (nd.ni_pathbuf != NULL) { 2389 pathbuf_destroy(nd.ni_pathbuf); 2390 nd.ni_pathbuf = NULL; 2391 } 2392 abort = 0; 2393 nfsm_reply(NFSX_SRVFH(&nsfh, v3) + NFSX_POSTOPATTR(v3) + 2394 NFSX_WCCDATA(v3)); 2395 if (v3) { 2396 if (!error) { 2397 nfsm_srvpostop_fh(&nsfh); 2398 nfsm_srvpostop_attr(0, &va); 2399 } 2400 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2401 } 2402 return (0); 2403 nfsmout: 2404 if (abort) { 2405 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2406 if (nd.ni_dvp == nd.ni_vp) 2407 vrele(nd.ni_dvp); 2408 else 2409 vput(nd.ni_dvp); 2410 if (nd.ni_vp) 2411 vrele(nd.ni_vp); 2412 if (nd.ni_pathbuf != NULL) { 2413 pathbuf_destroy(nd.ni_pathbuf); 2414 nd.ni_pathbuf = NULL; 2415 } 2416 } 2417 if (dirp) 2418 vrele(dirp); 2419 if (pathcp) 2420 free(pathcp, M_TEMP); 2421 return (error); 2422 } 2423 2424 /* 2425 * nfs mkdir service 2426 */ 2427 int 2428 nfsrv_mkdir(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 2429 { 2430 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2431 struct mbuf *nam = nfsd->nd_nam; 2432 char *dpos = nfsd->nd_dpos; 2433 kauth_cred_t cred = nfsd->nd_cr; 2434 struct vattr va, dirfor, diraft; 2435 struct nfs_fattr *fp; 2436 struct nameidata nd; 2437 char *cp; 2438 u_int32_t *tl; 2439 int32_t t1; 2440 char *bpos; 2441 int error = 0, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 2442 int abort = 0; 2443 int v3 = (nfsd->nd_flag & ND_NFSV3); 2444 char *cp2; 2445 struct mbuf *mb, *mreq __unused; 2446 struct vnode *vp, *dirp = (struct vnode *)0; 2447 nfsrvfh_t nsfh; 2448 u_quad_t frev; 2449 2450 nfsm_srvmtofh(&nsfh); 2451 nfsm_srvnamesiz(len); 2452 nd.ni_cnd.cn_cred = cred; 2453 nd.ni_cnd.cn_nameiop = CREATE; 2454 nd.ni_cnd.cn_flags = LOCKPARENT; 2455 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 2456 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 2457 if (dirp && v3) { 2458 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); 2459 } 2460 if (error) { 2461 if (nd.ni_pathbuf != NULL) { 2462 pathbuf_destroy(nd.ni_pathbuf); 2463 nd.ni_pathbuf = NULL; 2464 } 2465 nfsm_reply(NFSX_WCCDATA(v3)); 2466 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2467 if (dirp) 2468 vrele(dirp); 2469 return (0); 2470 } 2471 abort = 1; 2472 vattr_null(&va); 2473 if (v3) { 2474 va.va_mode = 0; 2475 nfsm_srvsattr(&va); 2476 } else { 2477 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2478 va.va_mode = nfstov_mode(*tl++); 2479 } 2480 va.va_type = VDIR; 2481 vp = nd.ni_vp; 2482 if (vp != NULL) { 2483 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2484 if (nd.ni_dvp == vp) 2485 vrele(nd.ni_dvp); 2486 else 2487 vput(nd.ni_dvp); 2488 vrele(vp); 2489 error = EEXIST; 2490 goto out; 2491 } 2492 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2493 error = VOP_MKDIR(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 2494 if (!error) { 2495 vp = nd.ni_vp; 2496 vn_lock(vp, LK_SHARED | LK_RETRY); 2497 error = nfsrv_composefh(vp, &nsfh, v3); 2498 if (!error) 2499 error = VOP_GETATTR(vp, &va, cred); 2500 vput(vp); 2501 } 2502 vput(nd.ni_dvp); 2503 out: 2504 if (dirp) { 2505 if (v3) { 2506 vn_lock(dirp, LK_SHARED | LK_RETRY); 2507 diraft_ret = VOP_GETATTR(dirp, &diraft, cred); 2508 VOP_UNLOCK(dirp); 2509 } 2510 vrele(dirp); 2511 dirp = NULL; 2512 } 2513 if (nd.ni_pathbuf != NULL) { 2514 pathbuf_destroy(nd.ni_pathbuf); 2515 nd.ni_pathbuf = NULL; 2516 } 2517 abort = 0; 2518 nfsm_reply(NFSX_SRVFH(&nsfh, v3) + NFSX_POSTOPATTR(v3) + 2519 NFSX_WCCDATA(v3)); 2520 if (v3) { 2521 if (!error) { 2522 nfsm_srvpostop_fh(&nsfh); 2523 nfsm_srvpostop_attr(0, &va); 2524 } 2525 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2526 } else { 2527 nfsm_srvfhtom(&nsfh, v3); 2528 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 2529 nfsm_srvfillattr(&va, fp); 2530 } 2531 return (0); 2532 nfsmout: 2533 if (abort) { 2534 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2535 if (nd.ni_dvp == nd.ni_vp) 2536 vrele(nd.ni_dvp); 2537 else 2538 vput(nd.ni_dvp); 2539 if (nd.ni_vp) 2540 vrele(nd.ni_vp); 2541 if (nd.ni_pathbuf != NULL) { 2542 pathbuf_destroy(nd.ni_pathbuf); 2543 nd.ni_pathbuf = NULL; 2544 } 2545 } 2546 if (dirp) 2547 vrele(dirp); 2548 return (error); 2549 } 2550 2551 /* 2552 * nfs rmdir service 2553 */ 2554 int 2555 nfsrv_rmdir(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 2556 { 2557 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2558 struct mbuf *nam = nfsd->nd_nam; 2559 char *dpos = nfsd->nd_dpos; 2560 kauth_cred_t cred = nfsd->nd_cr; 2561 u_int32_t *tl; 2562 int32_t t1; 2563 char *bpos; 2564 int error = 0, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 2565 int v3 = (nfsd->nd_flag & ND_NFSV3); 2566 char *cp2; 2567 struct mbuf *mb, *mreq __unused; 2568 struct vnode *vp, *dirp = (struct vnode *)0; 2569 struct vattr dirfor, diraft; 2570 nfsrvfh_t nsfh; 2571 struct nameidata nd; 2572 u_quad_t frev; 2573 2574 nfsm_srvmtofh(&nsfh); 2575 nfsm_srvnamesiz(len); 2576 nd.ni_cnd.cn_cred = cred; 2577 nd.ni_cnd.cn_nameiop = DELETE; 2578 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 2579 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 2580 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 2581 if (dirp && v3) { 2582 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); 2583 } 2584 if (error) { 2585 if (nd.ni_pathbuf != NULL) { 2586 pathbuf_destroy(nd.ni_pathbuf); 2587 nd.ni_pathbuf = NULL; 2588 } 2589 nfsm_reply(NFSX_WCCDATA(v3)); 2590 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2591 if (dirp) 2592 vrele(dirp); 2593 return (0); 2594 } 2595 vp = nd.ni_vp; 2596 if (vp->v_type != VDIR) { 2597 error = ENOTDIR; 2598 goto out; 2599 } 2600 /* 2601 * No rmdir "." please. 2602 */ 2603 if (nd.ni_dvp == vp) { 2604 error = EINVAL; 2605 goto out; 2606 } 2607 /* 2608 * The root of a mounted filesystem cannot be deleted. 2609 */ 2610 if (vp->v_vflag & VV_ROOT) 2611 error = EBUSY; 2612 out: 2613 if (!error) { 2614 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2615 nqsrv_getl(vp, ND_WRITE); 2616 error = VOP_RMDIR(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); 2617 vput(nd.ni_dvp); 2618 } else { 2619 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2620 if (nd.ni_dvp == nd.ni_vp) 2621 vrele(nd.ni_dvp); 2622 else 2623 vput(nd.ni_dvp); 2624 vput(vp); 2625 } 2626 if (nd.ni_pathbuf != NULL) { 2627 pathbuf_destroy(nd.ni_pathbuf); 2628 nd.ni_pathbuf = NULL; 2629 } 2630 if (dirp) { 2631 if (v3) { 2632 vn_lock(dirp, LK_SHARED | LK_RETRY); 2633 diraft_ret = VOP_GETATTR(dirp, &diraft, cred); 2634 VOP_UNLOCK(dirp); 2635 } 2636 vrele(dirp); 2637 } 2638 nfsm_reply(NFSX_WCCDATA(v3)); 2639 if (v3) { 2640 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2641 return (0); 2642 } 2643 nfsm_srvdone; 2644 } 2645 2646 /* 2647 * nfs readdir service 2648 * - mallocs what it thinks is enough to read 2649 * count rounded up to a multiple of NFS_SRVDIRBLKSIZ <= NFS_MAXREADDIR 2650 * - calls VOP_READDIR() 2651 * - loops around building the reply 2652 * if the output generated exceeds count break out of loop 2653 * The nfsm_clget macro is used here so that the reply will be packed 2654 * tightly in mbuf clusters. 2655 * - it only knows that it has encountered eof when the VOP_READDIR() 2656 * reads nothing 2657 * - as such one readdir rpc will return eof false although you are there 2658 * and then the next will return eof 2659 * - it trims out records with d_fileno == 0 2660 * this doesn't matter for Unix clients, but they might confuse clients 2661 * for other os'. 2662 * - it trims out records with d_type == DT_WHT 2663 * these cannot be seen through NFS (unless we extend the protocol) 2664 * NB: It is tempting to set eof to true if the VOP_READDIR() reads less 2665 * than requested, but this may not apply to all filesystems. For 2666 * example, client NFS does not { although it is never remote mounted 2667 * anyhow } 2668 * The alternate call nfsrv_readdirplus() does lookups as well. 2669 * PS: The NFS protocol spec. does not clarify what the "count" byte 2670 * argument is a count of.. just name strings and file id's or the 2671 * entire reply rpc or ... 2672 * I tried just file name and id sizes and it confused the Sun client, 2673 * so I am using the full rpc size now. The "paranoia.." comment refers 2674 * to including the status longwords that are not a part of the dir. 2675 * "entry" structures, but are in the rpc. 2676 */ 2677 2678 #define NFS_SRVDIRBLKSIZ 1024 2679 2680 struct flrep { 2681 nfsuint64 fl_off; 2682 u_int32_t fl_postopok; 2683 struct nfs_fattr fl_fattr; /* XXX: must be of fattr3 size */ 2684 u_int32_t fl_fhok; 2685 u_int32_t fl_fhsize; 2686 /* handle comes here, filled in dynamically */ 2687 }; 2688 2689 int 2690 nfsrv_readdir(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 2691 { 2692 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2693 struct mbuf *nam = nfsd->nd_nam; 2694 char *dpos = nfsd->nd_dpos; 2695 kauth_cred_t cred = nfsd->nd_cr; 2696 char *bp, *be; 2697 struct mbuf *mp; 2698 struct dirent *dp; 2699 char *cp; 2700 u_int32_t *tl; 2701 int32_t t1; 2702 char *bpos; 2703 struct mbuf *mb, *mreq __unused, *mp2; 2704 char *cpos, *cend, *cp2, *rbuf; 2705 struct vnode *vp; 2706 struct vattr at; 2707 nfsrvfh_t nsfh; 2708 struct uio io; 2709 struct iovec iv; 2710 int len, nlen, rem, xfer, tsiz, i, error = 0, getret = 1; 2711 int siz, cnt, fullsiz, eofflag, rdonly, cache = 0, ncookies; 2712 int v3 = (nfsd->nd_flag & ND_NFSV3); 2713 u_quad_t frev, off, toff; 2714 #ifdef NFS3_STRICTVERF 2715 u_quad_t verf; 2716 #endif 2717 off_t *cookies = NULL, *cookiep; 2718 nfsuint64 jar; 2719 2720 nfsm_srvmtofh(&nsfh); 2721 if (v3) { 2722 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 2723 toff = fxdr_hyper(tl); 2724 tl += 2; 2725 #ifdef NFS3_STRICTVERF 2726 verf = fxdr_hyper(tl); 2727 #endif 2728 tl += 2; 2729 } else { 2730 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2731 toff = fxdr_unsigned(u_quad_t, *tl++); 2732 } 2733 off = toff; 2734 cnt = fxdr_unsigned(int, *tl); 2735 siz = ((cnt + NFS_SRVDIRBLKSIZ - 1) & ~(NFS_SRVDIRBLKSIZ - 1)); 2736 xfer = NFS_SRVMAXDATA(nfsd); 2737 if (siz > xfer) 2738 siz = xfer; 2739 fullsiz = siz; 2740 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 2741 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 2742 if (!error && vp->v_type != VDIR) { 2743 error = ENOTDIR; 2744 vput(vp); 2745 } 2746 if (error) { 2747 nfsm_reply(NFSX_UNSIGNED); 2748 nfsm_srvpostop_attr(getret, &at); 2749 return (0); 2750 } 2751 nqsrv_getl(vp, ND_READ); 2752 if (v3) { 2753 error = getret = VOP_GETATTR(vp, &at, cred); 2754 #ifdef NFS3_STRICTVERF 2755 /* 2756 * XXX This check is too strict for Solaris 2.5 clients. 2757 */ 2758 if (!error && toff && verf != at.va_filerev) 2759 error = NFSERR_BAD_COOKIE; 2760 #endif 2761 } 2762 if (!error) 2763 error = nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 0); 2764 if (error) { 2765 vput(vp); 2766 nfsm_reply(NFSX_POSTOPATTR(v3)); 2767 nfsm_srvpostop_attr(getret, &at); 2768 return (0); 2769 } 2770 VOP_UNLOCK(vp); 2771 rbuf = malloc(siz, M_TEMP, M_WAITOK); 2772 again: 2773 iv.iov_base = rbuf; 2774 iv.iov_len = fullsiz; 2775 io.uio_iov = &iv; 2776 io.uio_iovcnt = 1; 2777 io.uio_offset = (off_t)off; 2778 io.uio_resid = fullsiz; 2779 io.uio_rw = UIO_READ; 2780 UIO_SETUP_SYSSPACE(&io); 2781 eofflag = 0; 2782 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2783 2784 error = VOP_READDIR(vp, &io, cred, &eofflag, &cookies, &ncookies); 2785 2786 off = (off_t)io.uio_offset; 2787 if (!cookies && !error) 2788 error = NFSERR_PERM; 2789 if (v3) { 2790 getret = VOP_GETATTR(vp, &at, cred); 2791 if (!error) 2792 error = getret; 2793 } 2794 2795 VOP_UNLOCK(vp); 2796 if (error) { 2797 vrele(vp); 2798 free((void *)rbuf, M_TEMP); 2799 if (cookies) 2800 free((void *)cookies, M_TEMP); 2801 nfsm_reply(NFSX_POSTOPATTR(v3)); 2802 nfsm_srvpostop_attr(getret, &at); 2803 return (0); 2804 } 2805 if (io.uio_resid) { 2806 siz -= io.uio_resid; 2807 2808 /* 2809 * If nothing read, return eof 2810 * rpc reply 2811 */ 2812 if (siz == 0) { 2813 vrele(vp); 2814 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_COOKIEVERF(v3) + 2815 2 * NFSX_UNSIGNED); 2816 if (v3) { 2817 nfsm_srvpostop_attr(getret, &at); 2818 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 2819 txdr_hyper(at.va_filerev, tl); 2820 tl += 2; 2821 } else 2822 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2823 *tl++ = nfs_false; 2824 *tl = nfs_true; 2825 free((void *)rbuf, M_TEMP); 2826 free((void *)cookies, M_TEMP); 2827 return (0); 2828 } 2829 } 2830 2831 /* 2832 * Check for degenerate cases of nothing useful read. 2833 * If so go try again 2834 */ 2835 cpos = rbuf; 2836 cend = rbuf + siz; 2837 dp = (struct dirent *)cpos; 2838 cookiep = cookies; 2839 2840 while (cpos < cend && ncookies > 0 && 2841 (dp->d_fileno == 0 || dp->d_type == DT_WHT)) { 2842 cpos += dp->d_reclen; 2843 dp = (struct dirent *)cpos; 2844 cookiep++; 2845 ncookies--; 2846 } 2847 if (cpos >= cend || ncookies == 0) { 2848 toff = off; 2849 siz = fullsiz; 2850 free(cookies, M_TEMP); 2851 cookies = NULL; 2852 goto again; 2853 } 2854 2855 len = 3 * NFSX_UNSIGNED; /* paranoia, probably can be 0 */ 2856 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_COOKIEVERF(v3) + siz); 2857 if (v3) { 2858 nfsm_srvpostop_attr(getret, &at); 2859 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2860 txdr_hyper(at.va_filerev, tl); 2861 } 2862 mp = mp2 = mb; 2863 bp = bpos; 2864 be = bp + M_TRAILINGSPACE(mp); 2865 2866 /* Loop through the records and build reply */ 2867 while (cpos < cend && ncookies > 0) { 2868 if (dp->d_fileno != 0 && dp->d_type != DT_WHT) { 2869 nlen = dp->d_namlen; 2870 rem = nfsm_rndup(nlen)-nlen; 2871 len += (4 * NFSX_UNSIGNED + nlen + rem); 2872 if (v3) 2873 len += 2 * NFSX_UNSIGNED; 2874 if (len > cnt) { 2875 eofflag = 0; 2876 break; 2877 } 2878 /* 2879 * Build the directory record xdr from 2880 * the dirent entry. 2881 */ 2882 nfsm_clget; 2883 *tl = nfs_true; 2884 bp += NFSX_UNSIGNED; 2885 if (v3) { 2886 nfsm_clget; 2887 *tl = txdr_unsigned(dp->d_fileno >> 32); 2888 bp += NFSX_UNSIGNED; 2889 } 2890 nfsm_clget; 2891 *tl = txdr_unsigned(dp->d_fileno); 2892 bp += NFSX_UNSIGNED; 2893 nfsm_clget; 2894 *tl = txdr_unsigned(nlen); 2895 bp += NFSX_UNSIGNED; 2896 2897 /* And loop around copying the name */ 2898 xfer = nlen; 2899 cp = dp->d_name; 2900 while (xfer > 0) { 2901 nfsm_clget; 2902 if ((bp+xfer) > be) 2903 tsiz = be-bp; 2904 else 2905 tsiz = xfer; 2906 memcpy(bp, cp, tsiz); 2907 bp += tsiz; 2908 xfer -= tsiz; 2909 if (xfer > 0) 2910 cp += tsiz; 2911 } 2912 /* And null pad to an int32_t boundary */ 2913 for (i = 0; i < rem; i++) 2914 *bp++ = '\0'; 2915 nfsm_clget; 2916 2917 /* Finish off the record */ 2918 txdr_hyper(*cookiep, &jar); 2919 if (v3) { 2920 *tl = jar.nfsuquad[0]; 2921 bp += NFSX_UNSIGNED; 2922 nfsm_clget; 2923 } 2924 *tl = jar.nfsuquad[1]; 2925 bp += NFSX_UNSIGNED; 2926 } 2927 cpos += dp->d_reclen; 2928 dp = (struct dirent *)cpos; 2929 cookiep++; 2930 ncookies--; 2931 } 2932 vrele(vp); 2933 nfsm_clget; 2934 *tl = nfs_false; 2935 bp += NFSX_UNSIGNED; 2936 nfsm_clget; 2937 if (eofflag) 2938 *tl = nfs_true; 2939 else 2940 *tl = nfs_false; 2941 bp += NFSX_UNSIGNED; 2942 if (mp != mb) { 2943 if (bp < be) 2944 mp->m_len = bp - mtod(mp, char *); 2945 } else 2946 mp->m_len += bp - bpos; 2947 free((void *)rbuf, M_TEMP); 2948 free((void *)cookies, M_TEMP); 2949 nfsm_srvdone; 2950 } 2951 2952 int 2953 nfsrv_readdirplus(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 2954 { 2955 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2956 struct mbuf *nam = nfsd->nd_nam; 2957 char *dpos = nfsd->nd_dpos; 2958 kauth_cred_t cred = nfsd->nd_cr; 2959 char *bp, *be; 2960 struct mbuf *mp; 2961 struct dirent *dp; 2962 char *cp; 2963 u_int32_t *tl; 2964 int32_t t1; 2965 char *bpos; 2966 struct mbuf *mb, *mreq __unused, *mp2; 2967 char *cpos, *cend, *cp2, *rbuf; 2968 struct vnode *vp, *nvp; 2969 struct flrep fl; 2970 nfsrvfh_t nsfh; 2971 struct uio io; 2972 struct iovec iv; 2973 struct vattr va, at, *vap = &va; 2974 struct nfs_fattr *fp; 2975 int len, nlen, rem, xfer, tsiz, i, error = 0, getret = 1; 2976 int siz, cnt, fullsiz, eofflag, rdonly, cache = 0, dirlen, ncookies; 2977 u_quad_t frev, off, toff; 2978 #ifdef NFS3_STRICTVERF 2979 u_quad_t verf; 2980 #endif 2981 off_t *cookies = NULL, *cookiep; 2982 2983 nfsm_srvmtofh(&nsfh); 2984 nfsm_dissect(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 2985 toff = fxdr_hyper(tl); 2986 tl += 2; 2987 #ifdef NFS3_STRICTVERF 2988 verf = fxdr_hyper(tl); 2989 #endif 2990 tl += 2; 2991 siz = fxdr_unsigned(int, *tl++); 2992 cnt = fxdr_unsigned(int, *tl); 2993 off = toff; 2994 siz = ((siz + NFS_SRVDIRBLKSIZ - 1) & ~(NFS_SRVDIRBLKSIZ - 1)); 2995 xfer = NFS_SRVMAXDATA(nfsd); 2996 if (siz > xfer) 2997 siz = xfer; 2998 fullsiz = siz; 2999 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 3000 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 3001 if (!error && vp->v_type != VDIR) { 3002 error = ENOTDIR; 3003 vput(vp); 3004 } 3005 if (error) { 3006 nfsm_reply(NFSX_UNSIGNED); 3007 nfsm_srvpostop_attr(getret, &at); 3008 return (0); 3009 } 3010 error = getret = VOP_GETATTR(vp, &at, cred); 3011 #ifdef NFS3_STRICTVERF 3012 /* 3013 * XXX This check is too strict for Solaris 2.5 clients. 3014 */ 3015 if (!error && toff && verf != at.va_filerev) 3016 error = NFSERR_BAD_COOKIE; 3017 #endif 3018 if (!error) { 3019 nqsrv_getl(vp, ND_READ); 3020 error = nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 0); 3021 } 3022 if (error) { 3023 vput(vp); 3024 nfsm_reply(NFSX_V3POSTOPATTR); 3025 nfsm_srvpostop_attr(getret, &at); 3026 return (0); 3027 } 3028 VOP_UNLOCK(vp); 3029 3030 rbuf = malloc(siz, M_TEMP, M_WAITOK); 3031 again: 3032 iv.iov_base = rbuf; 3033 iv.iov_len = fullsiz; 3034 io.uio_iov = &iv; 3035 io.uio_iovcnt = 1; 3036 io.uio_offset = (off_t)off; 3037 io.uio_resid = fullsiz; 3038 io.uio_rw = UIO_READ; 3039 UIO_SETUP_SYSSPACE(&io); 3040 eofflag = 0; 3041 3042 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 3043 3044 error = VOP_READDIR(vp, &io, cred, &eofflag, &cookies, &ncookies); 3045 3046 off = (u_quad_t)io.uio_offset; 3047 getret = VOP_GETATTR(vp, &at, cred); 3048 3049 VOP_UNLOCK(vp); 3050 3051 /* 3052 * If the VGET operation doesn't work for this filesystem, 3053 * we can't support readdirplus. Returning NOTSUPP should 3054 * make clients fall back to plain readdir. 3055 * There's no need to check for VPTOFH as well, we wouldn't 3056 * even be here otherwise. 3057 */ 3058 if (!getret) { 3059 if ((getret = VFS_VGET(vp->v_mount, at.va_fileid, 3060 LK_EXCLUSIVE, &nvp))) 3061 getret = (getret == EOPNOTSUPP) ? 3062 NFSERR_NOTSUPP : NFSERR_IO; 3063 else 3064 vput(nvp); 3065 } 3066 3067 if (!cookies && !error) 3068 error = NFSERR_PERM; 3069 if (!error) 3070 error = getret; 3071 if (error) { 3072 vrele(vp); 3073 if (cookies) 3074 free((void *)cookies, M_TEMP); 3075 free((void *)rbuf, M_TEMP); 3076 nfsm_reply(NFSX_V3POSTOPATTR); 3077 nfsm_srvpostop_attr(getret, &at); 3078 return (0); 3079 } 3080 if (io.uio_resid) { 3081 siz -= io.uio_resid; 3082 3083 /* 3084 * If nothing read, return eof 3085 * rpc reply 3086 */ 3087 if (siz == 0) { 3088 vrele(vp); 3089 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF + 3090 2 * NFSX_UNSIGNED); 3091 nfsm_srvpostop_attr(getret, &at); 3092 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 3093 txdr_hyper(at.va_filerev, tl); 3094 tl += 2; 3095 *tl++ = nfs_false; 3096 *tl = nfs_true; 3097 free((void *)cookies, M_TEMP); 3098 free((void *)rbuf, M_TEMP); 3099 return (0); 3100 } 3101 } 3102 3103 /* 3104 * Check for degenerate cases of nothing useful read. 3105 * If so go try again 3106 */ 3107 cpos = rbuf; 3108 cend = rbuf + siz; 3109 dp = (struct dirent *)cpos; 3110 cookiep = cookies; 3111 3112 while (cpos < cend && ncookies > 0 && 3113 (dp->d_fileno == 0 || dp->d_type == DT_WHT)) { 3114 cpos += dp->d_reclen; 3115 dp = (struct dirent *)cpos; 3116 cookiep++; 3117 ncookies--; 3118 } 3119 if (cpos >= cend || ncookies == 0) { 3120 toff = off; 3121 siz = fullsiz; 3122 free(cookies, M_TEMP); 3123 cookies = NULL; 3124 goto again; 3125 } 3126 3127 dirlen = len = NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF + 2 * NFSX_UNSIGNED; 3128 nfsm_reply(cnt); 3129 nfsm_srvpostop_attr(getret, &at); 3130 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 3131 txdr_hyper(at.va_filerev, tl); 3132 mp = mp2 = mb; 3133 bp = bpos; 3134 be = bp + M_TRAILINGSPACE(mp); 3135 3136 /* Loop through the records and build reply */ 3137 while (cpos < cend && ncookies > 0) { 3138 if (dp->d_fileno != 0 && dp->d_type != DT_WHT) { 3139 nfsrvfh_t nnsfh; 3140 3141 nlen = dp->d_namlen; 3142 rem = nfsm_rndup(nlen)-nlen; 3143 3144 /* 3145 * For readdir_and_lookup get the vnode using 3146 * the file number. 3147 */ 3148 if (VFS_VGET(vp->v_mount, dp->d_fileno, LK_EXCLUSIVE, 3149 &nvp)) 3150 goto invalid; 3151 if (nfsrv_composefh(nvp, &nnsfh, true)) { 3152 vput(nvp); 3153 goto invalid; 3154 } 3155 if (VOP_GETATTR(nvp, vap, cred)) { 3156 vput(nvp); 3157 goto invalid; 3158 } 3159 vput(nvp); 3160 3161 /* 3162 * If either the dircount or maxcount will be 3163 * exceeded, get out now. Both of these lengths 3164 * are calculated conservatively, including all 3165 * XDR overheads. 3166 */ 3167 len += (8 * NFSX_UNSIGNED + nlen + rem + NFSX_V3FH + 3168 NFSX_V3POSTOPATTR); 3169 dirlen += (6 * NFSX_UNSIGNED + nlen + rem); 3170 if (len > cnt || dirlen > fullsiz) { 3171 eofflag = 0; 3172 break; 3173 } 3174 3175 /* 3176 * Build the directory record xdr from 3177 * the dirent entry. 3178 */ 3179 fp = (struct nfs_fattr *)&fl.fl_fattr; 3180 nfsm_srvfillattr(vap, fp); 3181 fl.fl_fhsize = txdr_unsigned(NFSX_V3FH); 3182 fl.fl_fhok = nfs_true; 3183 fl.fl_postopok = nfs_true; 3184 txdr_hyper(*cookiep, fl.fl_off.nfsuquad); 3185 3186 nfsm_clget; 3187 *tl = nfs_true; 3188 bp += NFSX_UNSIGNED; 3189 nfsm_clget; 3190 *tl = txdr_unsigned(dp->d_fileno >> 32); 3191 bp += NFSX_UNSIGNED; 3192 nfsm_clget; 3193 *tl = txdr_unsigned(dp->d_fileno); 3194 bp += NFSX_UNSIGNED; 3195 nfsm_clget; 3196 *tl = txdr_unsigned(nlen); 3197 bp += NFSX_UNSIGNED; 3198 3199 /* And loop around copying the name */ 3200 xfer = nlen; 3201 cp = dp->d_name; 3202 while (xfer > 0) { 3203 nfsm_clget; 3204 if ((bp + xfer) > be) 3205 tsiz = be - bp; 3206 else 3207 tsiz = xfer; 3208 memcpy(bp, cp, tsiz); 3209 bp += tsiz; 3210 xfer -= tsiz; 3211 if (xfer > 0) 3212 cp += tsiz; 3213 } 3214 /* And null pad to an int32_t boundary */ 3215 for (i = 0; i < rem; i++) 3216 *bp++ = '\0'; 3217 3218 /* 3219 * Now copy the flrep structure out. 3220 */ 3221 xfer = sizeof(struct flrep); 3222 cp = (void *)&fl; 3223 while (xfer > 0) { 3224 nfsm_clget; 3225 if ((bp + xfer) > be) 3226 tsiz = be - bp; 3227 else 3228 tsiz = xfer; 3229 memcpy(bp, cp, tsiz); 3230 bp += tsiz; 3231 xfer -= tsiz; 3232 if (xfer > 0) 3233 cp += tsiz; 3234 } 3235 3236 /* 3237 * ... and filehandle. 3238 */ 3239 xfer = NFSRVFH_SIZE(&nnsfh); 3240 cp = NFSRVFH_DATA(&nnsfh); 3241 while (xfer > 0) { 3242 nfsm_clget; 3243 if ((bp + xfer) > be) 3244 tsiz = be - bp; 3245 else 3246 tsiz = xfer; 3247 memcpy(bp, cp, tsiz); 3248 bp += tsiz; 3249 xfer -= tsiz; 3250 if (xfer > 0) 3251 cp += tsiz; 3252 } 3253 } 3254 invalid: 3255 cpos += dp->d_reclen; 3256 dp = (struct dirent *)cpos; 3257 cookiep++; 3258 ncookies--; 3259 } 3260 vrele(vp); 3261 nfsm_clget; 3262 *tl = nfs_false; 3263 bp += NFSX_UNSIGNED; 3264 nfsm_clget; 3265 if (eofflag) 3266 *tl = nfs_true; 3267 else 3268 *tl = nfs_false; 3269 bp += NFSX_UNSIGNED; 3270 if (mp != mb) { 3271 if (bp < be) 3272 mp->m_len = bp - mtod(mp, char *); 3273 } else 3274 mp->m_len += bp - bpos; 3275 free((void *)cookies, M_TEMP); 3276 free((void *)rbuf, M_TEMP); 3277 nfsm_srvdone; 3278 } 3279 3280 /* 3281 * nfs commit service 3282 */ 3283 int 3284 nfsrv_commit(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 3285 { 3286 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3287 struct mbuf *nam = nfsd->nd_nam; 3288 char *dpos = nfsd->nd_dpos; 3289 kauth_cred_t cred = nfsd->nd_cr; 3290 struct vattr bfor, aft; 3291 struct vnode *vp; 3292 nfsrvfh_t nsfh; 3293 u_int32_t *tl; 3294 int32_t t1; 3295 char *bpos; 3296 int error = 0, rdonly, for_ret = 1, aft_ret = 1, cache = 0; 3297 uint32_t cnt; 3298 char *cp2; 3299 struct mbuf *mb, *mreq __unused; 3300 u_quad_t frev, off, end; 3301 3302 nfsm_srvmtofh(&nsfh); 3303 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 3304 3305 off = fxdr_hyper(tl); 3306 tl += 2; 3307 cnt = fxdr_unsigned(uint32_t, *tl); 3308 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 3309 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 3310 if (error) { 3311 nfsm_reply(2 * NFSX_UNSIGNED); 3312 nfsm_srvwcc_data(for_ret, &bfor, aft_ret, &aft); 3313 return (0); 3314 } 3315 for_ret = VOP_GETATTR(vp, &bfor, cred); 3316 end = (cnt > 0) ? off + cnt : vp->v_size; 3317 if (end < off || end > vp->v_size) 3318 end = vp->v_size; 3319 if (off < vp->v_size) 3320 error = VOP_FSYNC(vp, cred, FSYNC_WAIT, off, end); 3321 /* else error == 0, from nfsrv_fhtovp() */ 3322 aft_ret = VOP_GETATTR(vp, &aft, cred); 3323 vput(vp); 3324 nfsm_reply(NFSX_V3WCCDATA + NFSX_V3WRITEVERF); 3325 nfsm_srvwcc_data(for_ret, &bfor, aft_ret, &aft); 3326 if (!error) { 3327 nfsm_build(tl, u_int32_t *, NFSX_V3WRITEVERF); 3328 struct timeval btv; 3329 getmicroboottime(&btv); 3330 *tl++ = txdr_unsigned(btv.tv_sec); 3331 *tl = txdr_unsigned(btv.tv_usec); 3332 } else { 3333 return (0); 3334 } 3335 nfsm_srvdone; 3336 } 3337 3338 /* 3339 * nfs statfs service 3340 */ 3341 int 3342 nfsrv_statfs(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 3343 { 3344 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3345 struct mbuf *nam = nfsd->nd_nam; 3346 char *dpos = nfsd->nd_dpos; 3347 kauth_cred_t cred = nfsd->nd_cr; 3348 struct statvfs *sf = NULL; 3349 struct nfs_statfs *sfp; 3350 u_int32_t *tl; 3351 int32_t t1; 3352 char *bpos; 3353 int error = 0, rdonly, cache = 0, getret = 1; 3354 int v3 = (nfsd->nd_flag & ND_NFSV3); 3355 char *cp2; 3356 struct mbuf *mb, *mreq __unused; 3357 struct vnode *vp; 3358 struct vattr at; 3359 nfsrvfh_t nsfh; 3360 u_quad_t frev, tval; 3361 3362 nfsm_srvmtofh(&nsfh); 3363 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 3364 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 3365 if (error) { 3366 nfsm_reply(NFSX_UNSIGNED); 3367 nfsm_srvpostop_attr(getret, &at); 3368 return (0); 3369 } 3370 sf = malloc(sizeof(*sf), M_TEMP, M_WAITOK); 3371 error = VFS_STATVFS(vp->v_mount, sf); 3372 getret = VOP_GETATTR(vp, &at, cred); 3373 vput(vp); 3374 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_STATFS(v3)); 3375 if (v3) 3376 nfsm_srvpostop_attr(getret, &at); 3377 if (error) { 3378 free(sf, M_TEMP); 3379 return (0); 3380 } 3381 nfsm_build(sfp, struct nfs_statfs *, NFSX_STATFS(v3)); 3382 if (v3) { 3383 tval = (u_quad_t)((quad_t)sf->f_blocks * (quad_t)sf->f_frsize); 3384 txdr_hyper(tval, &sfp->sf_tbytes); 3385 tval = (u_quad_t)((quad_t)sf->f_bfree * (quad_t)sf->f_frsize); 3386 txdr_hyper(tval, &sfp->sf_fbytes); 3387 tval = (u_quad_t)((quad_t)sf->f_bavail * (quad_t)sf->f_frsize); 3388 txdr_hyper(tval, &sfp->sf_abytes); 3389 tval = (u_quad_t)sf->f_files; 3390 txdr_hyper(tval, &sfp->sf_tfiles); 3391 tval = (u_quad_t)sf->f_ffree; 3392 txdr_hyper(tval, &sfp->sf_ffiles); 3393 txdr_hyper(tval, &sfp->sf_afiles); 3394 sfp->sf_invarsec = 0; 3395 } else { 3396 sfp->sf_tsize = txdr_unsigned(NFS_MAXDGRAMDATA); 3397 sfp->sf_bsize = txdr_unsigned(sf->f_frsize); 3398 sfp->sf_blocks = txdr_unsigned(sf->f_blocks); 3399 sfp->sf_bfree = txdr_unsigned(sf->f_bfree); 3400 sfp->sf_bavail = txdr_unsigned(sf->f_bavail); 3401 } 3402 nfsmout: 3403 if (sf) 3404 free(sf, M_TEMP); 3405 return error; 3406 } 3407 3408 /* 3409 * nfs fsinfo service 3410 */ 3411 int 3412 nfsrv_fsinfo(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 3413 { 3414 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3415 struct mbuf *nam = nfsd->nd_nam; 3416 char *dpos = nfsd->nd_dpos; 3417 kauth_cred_t cred = nfsd->nd_cr; 3418 u_int32_t *tl; 3419 struct nfsv3_fsinfo *sip; 3420 int32_t t1; 3421 char *bpos; 3422 int error = 0, rdonly, cache = 0, getret = 1; 3423 uint32_t maxdata; 3424 char *cp2; 3425 struct mbuf *mb, *mreq __unused; 3426 struct vnode *vp; 3427 struct vattr at; 3428 nfsrvfh_t nsfh; 3429 u_quad_t frev, maxfsize; 3430 struct statvfs *sb; 3431 3432 nfsm_srvmtofh(&nsfh); 3433 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 3434 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 3435 if (error) { 3436 nfsm_reply(NFSX_UNSIGNED); 3437 nfsm_srvpostop_attr(getret, &at); 3438 return (0); 3439 } 3440 3441 /* XXX Try to make a guess on the max file size. */ 3442 sb = malloc(sizeof(*sb), M_TEMP, M_WAITOK); 3443 VFS_STATVFS(vp->v_mount, sb); 3444 maxfsize = (u_quad_t)0x80000000 * sb->f_frsize - 1; 3445 free(sb, M_TEMP); 3446 3447 getret = VOP_GETATTR(vp, &at, cred); 3448 vput(vp); 3449 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3FSINFO); 3450 nfsm_srvpostop_attr(getret, &at); 3451 nfsm_build(sip, struct nfsv3_fsinfo *, NFSX_V3FSINFO); 3452 3453 /* 3454 * XXX 3455 * There should be file system VFS OP(s) to get this information. 3456 * For now, assume ufs. 3457 */ 3458 if (slp->ns_so->so_type == SOCK_DGRAM) 3459 maxdata = NFS_MAXDGRAMDATA; 3460 else 3461 maxdata = NFS_MAXDATA; 3462 sip->fs_rtmax = txdr_unsigned(maxdata); 3463 sip->fs_rtpref = txdr_unsigned(maxdata); 3464 sip->fs_rtmult = txdr_unsigned(NFS_FABLKSIZE); 3465 sip->fs_wtmax = txdr_unsigned(maxdata); 3466 sip->fs_wtpref = txdr_unsigned(maxdata); 3467 sip->fs_wtmult = txdr_unsigned(NFS_FABLKSIZE); 3468 sip->fs_dtpref = txdr_unsigned(maxdata); 3469 txdr_hyper(maxfsize, &sip->fs_maxfilesize); 3470 sip->fs_timedelta.nfsv3_sec = 0; 3471 sip->fs_timedelta.nfsv3_nsec = txdr_unsigned(1); 3472 sip->fs_properties = txdr_unsigned(NFSV3FSINFO_LINK | 3473 NFSV3FSINFO_SYMLINK | NFSV3FSINFO_HOMOGENEOUS | 3474 NFSV3FSINFO_CANSETTIME); 3475 nfsm_srvdone; 3476 } 3477 3478 /* 3479 * nfs pathconf service 3480 */ 3481 int 3482 nfsrv_pathconf(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 3483 { 3484 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3485 struct mbuf *nam = nfsd->nd_nam; 3486 char *dpos = nfsd->nd_dpos; 3487 kauth_cred_t cred = nfsd->nd_cr; 3488 u_int32_t *tl; 3489 struct nfsv3_pathconf *pc; 3490 int32_t t1; 3491 char *bpos; 3492 int error = 0, rdonly, cache = 0, getret = 1; 3493 register_t linkmax, namemax, chownres, notrunc; 3494 char *cp2; 3495 struct mbuf *mb, *mreq __unused; 3496 struct vnode *vp; 3497 struct vattr at; 3498 nfsrvfh_t nsfh; 3499 u_quad_t frev; 3500 3501 nfsm_srvmtofh(&nsfh); 3502 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 3503 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 3504 if (error) { 3505 nfsm_reply(NFSX_UNSIGNED); 3506 nfsm_srvpostop_attr(getret, &at); 3507 return (0); 3508 } 3509 error = VOP_PATHCONF(vp, _PC_LINK_MAX, &linkmax); 3510 if (!error) 3511 error = VOP_PATHCONF(vp, _PC_NAME_MAX, &namemax); 3512 if (!error) 3513 error = VOP_PATHCONF(vp, _PC_CHOWN_RESTRICTED, &chownres); 3514 if (!error) 3515 error = VOP_PATHCONF(vp, _PC_NO_TRUNC, ¬runc); 3516 getret = VOP_GETATTR(vp, &at, cred); 3517 vput(vp); 3518 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3PATHCONF); 3519 nfsm_srvpostop_attr(getret, &at); 3520 if (error) 3521 return (0); 3522 nfsm_build(pc, struct nfsv3_pathconf *, NFSX_V3PATHCONF); 3523 3524 pc->pc_linkmax = txdr_unsigned(linkmax); 3525 pc->pc_namemax = txdr_unsigned(namemax); 3526 pc->pc_notrunc = txdr_unsigned(notrunc); 3527 pc->pc_chownrestricted = txdr_unsigned(chownres); 3528 3529 /* 3530 * These should probably be supported by VOP_PATHCONF(), but 3531 * until msdosfs is exportable (why would you want to?), the 3532 * Unix defaults should be ok. 3533 */ 3534 pc->pc_caseinsensitive = nfs_false; 3535 pc->pc_casepreserving = nfs_true; 3536 nfsm_srvdone; 3537 } 3538 3539 /* 3540 * Null operation, used by clients to ping server 3541 */ 3542 /* ARGSUSED */ 3543 int 3544 nfsrv_null(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, 3545 struct lwp *lwp, struct mbuf **mrq) 3546 { 3547 struct mbuf *mrep = nfsd->nd_mrep; 3548 char *bpos; 3549 int error = NFSERR_RETVOID, cache = 0; 3550 struct mbuf *mb, *mreq __unused; 3551 u_quad_t frev; 3552 3553 nfsm_reply(0); 3554 nfsmout: 3555 return (0); 3556 } 3557 3558 /* 3559 * No operation, used for obsolete procedures 3560 */ 3561 /* ARGSUSED */ 3562 int 3563 nfsrv_noop(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, 3564 struct lwp *lwp, struct mbuf **mrq) 3565 { 3566 struct mbuf *mrep = nfsd->nd_mrep; 3567 char *bpos; 3568 int error, cache = 0; 3569 struct mbuf *mb, *mreq __unused; 3570 u_quad_t frev; 3571 3572 if (nfsd->nd_repstat) 3573 error = nfsd->nd_repstat; 3574 else 3575 error = EPROCUNAVAIL; 3576 nfsm_reply(0); 3577 nfsmout: 3578 return (0); 3579 } 3580 3581 /* 3582 * Perform access checking for vnodes obtained from file handles that would 3583 * refer to files already opened by a Unix client. You cannot just use 3584 * vn_writechk() and VOP_ACCESS() for two reasons. 3585 * 1 - You must check for exported rdonly as well as MNT_RDONLY for the write case 3586 * 2 - The owner is to be given access irrespective of mode bits for some 3587 * operations, so that processes that chmod after opening a file don't 3588 * break. I don't like this because it opens a security hole, but since 3589 * the nfs server opens a security hole the size of a barn door anyhow, 3590 * what the heck. 3591 * 3592 * The exception to rule 2 is EPERM. If a file is IMMUTABLE, VOP_ACCESS() 3593 * will return EPERM instead of EACCES. EPERM is always an error. 3594 */ 3595 int 3596 nfsrv_access(struct vnode *vp, int flags, kauth_cred_t cred, int rdonly, struct lwp *lwp, int override) 3597 { 3598 struct vattr vattr; 3599 int error; 3600 if (flags & VWRITE) { 3601 /* Just vn_writechk() changed to check rdonly */ 3602 /* 3603 * Disallow write attempts on read-only file systems; 3604 * unless the file is a socket or a block or character 3605 * device resident on the file system. 3606 */ 3607 if (rdonly || (vp->v_mount->mnt_flag & MNT_RDONLY)) { 3608 switch (vp->v_type) { 3609 case VREG: 3610 case VDIR: 3611 case VLNK: 3612 return (EROFS); 3613 default: 3614 break; 3615 } 3616 } 3617 3618 /* 3619 * If the vnode is in use as a process's text, 3620 * we can't allow writing. 3621 */ 3622 if (vp->v_iflag & VI_TEXT) 3623 return (ETXTBSY); 3624 } 3625 error = VOP_GETATTR(vp, &vattr, cred); 3626 if (error) 3627 return (error); 3628 error = VOP_ACCESS(vp, flags, cred); 3629 /* 3630 * Allow certain operations for the owner (reads and writes 3631 * on files that are already open). 3632 */ 3633 if (override && error == EACCES && kauth_cred_geteuid(cred) == vattr.va_uid) 3634 error = 0; 3635 return error; 3636 } 3637
Indexes created Thu Sep 25 08:09:54 GMT 2025