nfs_serv.c revision 1.173.4.1
1 /* $NetBSD: nfs_serv.c,v 1.173.4.1 2023/03/30 12:01:25 martin 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 1.173.4.1 2023/03/30 12:01:25 martin Exp $"); 59 60 #include <sys/param.h> 61 #include <sys/systm.h> 62 #include <sys/proc.h> 63 #include <sys/file.h> 64 #include <sys/namei.h> 65 #include <sys/vnode.h> 66 #include <sys/mount.h> 67 #include <sys/socket.h> 68 #include <sys/socketvar.h> 69 #include <sys/mbuf.h> 70 #include <sys/dirent.h> 71 #include <sys/stat.h> 72 #include <sys/kernel.h> 73 #include <sys/hash.h> 74 #include <sys/kauth.h> 75 #include <sys/module.h> 76 #include <sys/syscall.h> 77 #include <sys/syscallargs.h> 78 #include <sys/syscallvar.h> 79 80 #include <uvm/uvm.h> 81 82 #include <nfs/nfsproto.h> 83 #include <nfs/rpcv2.h> 84 #include <nfs/nfs.h> 85 #include <nfs/xdr_subs.h> 86 #include <nfs/nfsm_subs.h> 87 #include <nfs/nfs_var.h> 88 89 MODULE(MODULE_CLASS_MISC, nfsserver, "nfs"); 90 91 /* Global vars */ 92 extern u_int32_t nfs_xdrneg1; 93 extern u_int32_t nfs_false, nfs_true; 94 extern const enum vtype nv3tov_type[8]; 95 extern struct nfsstats nfsstats; 96 extern const nfstype nfsv2_type[9]; 97 extern const nfstype nfsv3_type[9]; 98 int nfsrvw_procrastinate = NFS_GATHERDELAY * 1000; 99 bool nfsd_use_loan = true; /* use page-loan for READ OP */ 100 101 #define nqsrv_getl(vp, rw) /* nothing */ 102 103 static const struct syscall_package nfsserver_syscalls[] = { 104 { SYS_nfssvc, 0, (sy_call_t *)sys_nfssvc }, 105 { 0, 0, NULL }, 106 }; 107 108 static int 109 nfsserver_modcmd(modcmd_t cmd, void *arg) 110 { 111 extern struct vfs_hooks nfs_export_hooks; /* XXX */ 112 int error; 113 114 switch (cmd) { 115 case MODULE_CMD_INIT: 116 error = syscall_establish(NULL, nfsserver_syscalls); 117 if (error != 0) { 118 return error; 119 } 120 nfs_init(); /* XXX for monolithic kernel */ 121 netexport_init(); 122 nfsrv_initcache(); /* Init the server request cache */ 123 nfsrv_init(0); /* Init server data structures */ 124 vfs_hooks_attach(&nfs_export_hooks); 125 nfs_timer_srvinit(nfsrv_timer); 126 return 0; 127 case MODULE_CMD_FINI: 128 error = syscall_disestablish(NULL, nfsserver_syscalls); 129 if (error != 0) { 130 return error; 131 } 132 /* 133 * Kill export list before detaching VFS hooks, so we 134 * we don't leak state due to a concurrent umount(). 135 */ 136 netexport_fini(); 137 vfs_hooks_detach(&nfs_export_hooks); 138 139 /* Kill timer before server goes away. */ 140 nfs_timer_srvfini(); 141 nfsrv_fini(); 142 143 /* Server uses server cache, so kill cache last. */ 144 nfsrv_finicache(); 145 nfs_fini(); 146 return 0; 147 case MODULE_CMD_AUTOUNLOAD: 148 if (netexport_hasexports()) 149 return EBUSY; 150 /*FALLTHROUGH*/ 151 default: 152 return ENOTTY; 153 } 154 } 155 156 /* 157 * nfs v3 access service 158 */ 159 int 160 nfsrv3_access(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 161 { 162 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 163 struct mbuf *nam = nfsd->nd_nam; 164 char *dpos = nfsd->nd_dpos; 165 kauth_cred_t cred = nfsd->nd_cr; 166 struct vnode *vp; 167 nfsrvfh_t nsfh; 168 u_int32_t *tl; 169 int32_t t1; 170 char *bpos; 171 int error = 0, rdonly, cache = 0, getret; 172 char *cp2; 173 struct mbuf *mb, *mreq __unused; 174 struct vattr va; 175 u_long inmode, testmode, outmode; 176 u_quad_t frev; 177 178 nfsm_srvmtofh(&nsfh); 179 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 180 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, &rdonly, 181 (nfsd->nd_flag & ND_KERBAUTH), false); 182 if (error) { 183 nfsm_reply(NFSX_UNSIGNED); 184 nfsm_srvpostop_attr(1, (struct vattr *)0); 185 return (0); 186 } 187 inmode = fxdr_unsigned(u_int32_t, *tl); 188 outmode = 0; 189 if ((inmode & NFSV3ACCESS_READ) && 190 nfsrv_access(vp, VREAD, cred, rdonly, lwp, 0) == 0) 191 outmode |= NFSV3ACCESS_READ; 192 if (vp->v_type != VDIR) { 193 testmode = inmode & (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND); 194 if (testmode && 195 nfsrv_access(vp, VWRITE, cred, rdonly, lwp, 0) == 0) 196 outmode |= testmode; 197 if ((inmode & NFSV3ACCESS_EXECUTE) && 198 nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 0) == 0) 199 outmode |= NFSV3ACCESS_EXECUTE; 200 } else { 201 testmode = inmode & (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | 202 NFSV3ACCESS_DELETE); 203 if (testmode && 204 nfsrv_access(vp, VWRITE, cred, rdonly, lwp, 0) == 0) 205 outmode |= testmode; 206 if ((inmode & NFSV3ACCESS_LOOKUP) && 207 nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 0) == 0) 208 outmode |= NFSV3ACCESS_LOOKUP; 209 } 210 getret = VOP_GETATTR(vp, &va, cred); 211 vput(vp); 212 nfsm_reply(NFSX_POSTOPATTR(1) + NFSX_UNSIGNED); 213 nfsm_srvpostop_attr(getret, &va); 214 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 215 *tl = txdr_unsigned(outmode); 216 nfsm_srvdone; 217 } 218 219 /* 220 * nfs getattr service 221 */ 222 int 223 nfsrv_getattr(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 224 { 225 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 226 struct mbuf *nam = nfsd->nd_nam; 227 char *dpos = nfsd->nd_dpos; 228 kauth_cred_t cred = nfsd->nd_cr; 229 struct nfs_fattr *fp; 230 struct vattr va; 231 struct vnode *vp; 232 nfsrvfh_t nsfh; 233 u_int32_t *tl; 234 int32_t t1; 235 char *bpos; 236 int error = 0, rdonly, cache = 0; 237 char *cp2; 238 struct mbuf *mb, *mreq __unused; 239 u_quad_t frev; 240 241 nfsm_srvmtofh(&nsfh); 242 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, &rdonly, 243 (nfsd->nd_flag & ND_KERBAUTH), false); 244 if (error) { 245 nfsm_reply(0); 246 return (0); 247 } 248 nqsrv_getl(vp, ND_READ); 249 error = VOP_GETATTR(vp, &va, cred); 250 vput(vp); 251 nfsm_reply(NFSX_FATTR(nfsd->nd_flag & ND_NFSV3)); 252 if (error) 253 return (0); 254 nfsm_build(fp, struct nfs_fattr *, NFSX_FATTR(nfsd->nd_flag & ND_NFSV3)); 255 nfsm_srvfillattr(&va, fp); 256 nfsm_srvdone; 257 } 258 259 /* 260 * nfs setattr service 261 */ 262 int 263 nfsrv_setattr(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 264 { 265 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 266 struct mbuf *nam = nfsd->nd_nam; 267 char *dpos = nfsd->nd_dpos; 268 kauth_cred_t cred = nfsd->nd_cr; 269 struct vattr va, preat; 270 struct nfsv2_sattr *sp; 271 struct nfs_fattr *fp; 272 struct vnode *vp; 273 nfsrvfh_t nsfh; 274 u_int32_t *tl; 275 int32_t t1; 276 char *bpos; 277 int error = 0, rdonly, cache = 0, preat_ret = 1, postat_ret = 1; 278 int v3 = (nfsd->nd_flag & ND_NFSV3), gcheck = 0; 279 char *cp2; 280 struct mbuf *mb, *mreq __unused; 281 u_quad_t frev; 282 struct timespec guard; 283 284 memset(&guard, 0, sizeof guard); /* XXX gcc */ 285 286 nfsm_srvmtofh(&nsfh); 287 vattr_null(&va); 288 if (v3) { 289 nfsm_srvsattr(&va); 290 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 291 gcheck = fxdr_unsigned(int, *tl); 292 if (gcheck) { 293 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 294 fxdr_nfsv3time(tl, &guard); 295 } 296 } else { 297 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 298 /* 299 * Nah nah nah nah na nah 300 * There is a bug in the Sun client that puts 0xffff in the mode 301 * field of sattr when it should put in 0xffffffff. The u_short 302 * doesn't sign extend. 303 * --> check the low order 2 bytes for 0xffff 304 */ 305 if ((fxdr_unsigned(int, sp->sa_mode) & 0xffff) != 0xffff) 306 va.va_mode = nfstov_mode(sp->sa_mode); 307 if (sp->sa_uid != nfs_xdrneg1) 308 va.va_uid = fxdr_unsigned(uid_t, sp->sa_uid); 309 if (sp->sa_gid != nfs_xdrneg1) 310 va.va_gid = fxdr_unsigned(gid_t, sp->sa_gid); 311 if (sp->sa_size != nfs_xdrneg1) 312 va.va_size = fxdr_unsigned(u_quad_t, sp->sa_size); 313 if (sp->sa_atime.nfsv2_sec != nfs_xdrneg1) { 314 #ifdef notyet 315 fxdr_nfsv2time(&sp->sa_atime, &va.va_atime); 316 #else 317 va.va_atime.tv_sec = 318 fxdr_unsigned(u_int32_t,sp->sa_atime.nfsv2_sec); 319 va.va_atime.tv_nsec = 0; 320 #endif 321 } 322 if (sp->sa_mtime.nfsv2_sec != nfs_xdrneg1) 323 fxdr_nfsv2time(&sp->sa_mtime, &va.va_mtime); 324 325 } 326 327 /* 328 * Now that we have all the fields, lets do it. 329 */ 330 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, &rdonly, 331 (nfsd->nd_flag & ND_KERBAUTH), false); 332 if (error) { 333 nfsm_reply(2 * NFSX_UNSIGNED); 334 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 335 return (0); 336 } 337 nqsrv_getl(vp, ND_WRITE); 338 if (v3) { 339 error = preat_ret = VOP_GETATTR(vp, &preat, cred); 340 if (!error && gcheck && 341 (preat.va_ctime.tv_sec != guard.tv_sec || 342 preat.va_ctime.tv_nsec != guard.tv_nsec)) 343 error = NFSERR_NOT_SYNC; 344 if (error) { 345 vput(vp); 346 nfsm_reply(NFSX_WCCDATA(v3)); 347 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 348 return (0); 349 } 350 } 351 352 /* 353 * If the size is being changed write acces is required, otherwise 354 * just check for a read only file system. 355 */ 356 if (va.va_size == ((u_quad_t)((quad_t) -1))) { 357 if (rdonly || (vp->v_mount->mnt_flag & MNT_RDONLY)) { 358 error = EROFS; 359 goto out; 360 } 361 } else { 362 if (vp->v_type == VDIR) { 363 error = EISDIR; 364 goto out; 365 } else if ((error = nfsrv_access(vp, VWRITE, cred, rdonly, 366 lwp, 0)) != 0) 367 goto out; 368 } 369 error = VOP_SETATTR(vp, &va, cred); 370 postat_ret = VOP_GETATTR(vp, &va, cred); 371 if (!error) 372 error = postat_ret; 373 out: 374 vput(vp); 375 nfsm_reply(NFSX_WCCORFATTR(v3)); 376 if (v3) { 377 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 378 return (0); 379 } else { 380 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 381 nfsm_srvfillattr(&va, fp); 382 } 383 nfsm_srvdone; 384 } 385 386 /* 387 * nfs lookup rpc 388 */ 389 int 390 nfsrv_lookup(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 391 { 392 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 393 struct mbuf *nam = nfsd->nd_nam; 394 char *dpos = nfsd->nd_dpos; 395 kauth_cred_t cred = nfsd->nd_cr; 396 struct nfs_fattr *fp; 397 struct nameidata nd, ind, *ndp = &nd; 398 struct pathbuf *ipb = NULL; 399 struct vnode *vp, *dirp; 400 nfsrvfh_t nsfh; 401 char *cp; 402 u_int32_t *tl; 403 int32_t t1; 404 char *bpos; 405 int error = 0, cache = 0, dirattr_ret = 1; 406 uint32_t len; 407 int v3 = (nfsd->nd_flag & ND_NFSV3), pubflag; 408 char *cp2; 409 struct mbuf *mb, *mreq __unused; 410 struct vattr va, dirattr; 411 u_quad_t frev; 412 413 nfsm_srvmtofh(&nsfh); 414 nfsm_srvnamesiz(len); 415 416 pubflag = nfs_ispublicfh(&nsfh); 417 418 nd.ni_cnd.cn_cred = cred; 419 nd.ni_cnd.cn_nameiop = LOOKUP; 420 nd.ni_cnd.cn_flags = LOCKLEAF; 421 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 422 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), pubflag); 423 424 if (!error && pubflag) { 425 if (nd.ni_vp->v_type == VDIR && nfs_pub.np_index != NULL && 426 (ipb = pathbuf_create(nfs_pub.np_index)) != NULL) { 427 /* 428 * Setup call to lookup() to see if we can find 429 * the index file. Arguably, this doesn't belong 430 * in a kernel.. Ugh. 431 */ 432 ind = nd; 433 VOP_UNLOCK(nd.ni_vp); 434 ind.ni_pathbuf = ipb; 435 436 error = lookup_for_nfsd_index(&ind, nd.ni_vp); 437 if (!error) { 438 /* 439 * Found an index file. Get rid of 440 * the old references. 441 */ 442 if (dirp) 443 vrele(dirp); 444 dirp = nd.ni_vp; 445 ndp = &ind; 446 } else 447 error = 0; 448 } 449 /* 450 * If the public filehandle was used, check that this lookup 451 * didn't result in a filehandle outside the publicly exported 452 * filesystem. 453 */ 454 455 if (!error && ndp->ni_vp->v_mount != nfs_pub.np_mount) { 456 vput(nd.ni_vp); 457 error = EPERM; 458 } 459 } 460 461 if (error) { 462 if (nd.ni_pathbuf != NULL) { 463 pathbuf_destroy(nd.ni_pathbuf); 464 } 465 if (ipb != NULL) { 466 pathbuf_destroy(ipb); 467 } 468 if (dirp) { 469 if (v3) { 470 vn_lock(dirp, LK_SHARED | LK_RETRY); 471 dirattr_ret = VOP_GETATTR(dirp, &dirattr, cred); 472 vput(dirp); 473 } else 474 vrele(dirp); 475 } 476 nfsm_reply(NFSX_POSTOPATTR(v3)); 477 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 478 return (0); 479 } 480 481 nqsrv_getl(ndp->ni_startdir, ND_READ); 482 pathbuf_destroy(nd.ni_pathbuf); 483 if (ipb != NULL) { 484 pathbuf_destroy(ipb); 485 } 486 vp = ndp->ni_vp; 487 error = nfsrv_composefh(vp, &nsfh, v3); 488 if (!error) 489 error = VOP_GETATTR(vp, &va, cred); 490 vput(vp); 491 if (dirp) { 492 if (v3) { 493 vn_lock(dirp, LK_SHARED | LK_RETRY); 494 dirattr_ret = VOP_GETATTR(dirp, &dirattr, cred); 495 vput(dirp); 496 } else 497 vrele(dirp); 498 } 499 nfsm_reply(NFSX_SRVFH(&nsfh, v3) + NFSX_POSTOPORFATTR(v3) + 500 NFSX_POSTOPATTR(v3)); 501 if (error) { 502 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 503 return (0); 504 } 505 nfsm_srvfhtom(&nsfh, v3); 506 if (v3) { 507 nfsm_srvpostop_attr(0, &va); 508 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 509 } else { 510 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 511 nfsm_srvfillattr(&va, fp); 512 } 513 nfsm_srvdone; 514 } 515 516 /* 517 * nfs readlink service 518 */ 519 int 520 nfsrv_readlink(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 521 { 522 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 523 struct mbuf *nam = nfsd->nd_nam; 524 char *dpos = nfsd->nd_dpos; 525 kauth_cred_t cred = nfsd->nd_cr; 526 struct iovec iv[(NFS_MAXPATHLEN+MLEN-1)/MLEN]; 527 struct iovec *ivp = iv; 528 struct mbuf *mp; 529 u_int32_t *tl; 530 int32_t t1; 531 char *bpos; 532 int error = 0, rdonly, cache = 0, i, padlen, getret; 533 uint32_t len; 534 int v3 = (nfsd->nd_flag & ND_NFSV3); 535 char *cp2; 536 struct mbuf *mb, *mp2 = NULL, *mp3 = NULL, *mreq __unused; 537 struct vnode *vp; 538 struct vattr attr; 539 nfsrvfh_t nsfh; 540 struct uio io, *uiop = &io; 541 u_quad_t frev; 542 543 nfsm_srvmtofh(&nsfh); 544 len = 0; 545 i = 0; 546 while (len < NFS_MAXPATHLEN) { 547 mp = m_get(M_WAIT, MT_DATA); 548 MCLAIM(mp, &nfs_mowner); 549 m_clget(mp, M_WAIT); 550 mp->m_len = NFSMSIZ(mp); 551 if (len == 0) 552 mp3 = mp2 = mp; 553 else { 554 mp2->m_next = mp; 555 mp2 = mp; 556 } 557 if ((len+mp->m_len) > NFS_MAXPATHLEN) { 558 mp->m_len = NFS_MAXPATHLEN-len; 559 len = NFS_MAXPATHLEN; 560 } else 561 len += mp->m_len; 562 ivp->iov_base = mtod(mp, void *); 563 ivp->iov_len = mp->m_len; 564 i++; 565 ivp++; 566 } 567 uiop->uio_iov = iv; 568 uiop->uio_iovcnt = i; 569 uiop->uio_offset = 0; 570 uiop->uio_resid = len; 571 uiop->uio_rw = UIO_READ; 572 UIO_SETUP_SYSSPACE(uiop); 573 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 574 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 575 if (error) { 576 m_freem(mp3); 577 nfsm_reply(2 * NFSX_UNSIGNED); 578 nfsm_srvpostop_attr(1, (struct vattr *)0); 579 return (0); 580 } 581 if (vp->v_type != VLNK) { 582 if (v3) 583 error = EINVAL; 584 else 585 error = ENXIO; 586 goto out; 587 } 588 nqsrv_getl(vp, ND_READ); 589 error = VOP_READLINK(vp, uiop, cred); 590 out: 591 getret = VOP_GETATTR(vp, &attr, cred); 592 vput(vp); 593 if (error) 594 m_freem(mp3); 595 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_UNSIGNED); 596 if (v3) { 597 nfsm_srvpostop_attr(getret, &attr); 598 if (error) 599 return (0); 600 } 601 len -= uiop->uio_resid; 602 padlen = nfsm_padlen(len); 603 if (uiop->uio_resid || padlen) 604 nfs_zeropad(mp3, uiop->uio_resid, padlen); 605 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 606 *tl = txdr_unsigned(len); 607 mb->m_next = mp3; 608 nfsm_srvdone; 609 } 610 611 /* 612 * nfs read service 613 */ 614 int 615 nfsrv_read(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 616 { 617 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 618 struct mbuf *nam = nfsd->nd_nam; 619 char *dpos = nfsd->nd_dpos; 620 kauth_cred_t cred = nfsd->nd_cr; 621 struct mbuf *m; 622 struct nfs_fattr *fp; 623 u_int32_t *tl; 624 int32_t t1; 625 int i; 626 char *bpos; 627 int error = 0, rdonly, cache = 0, getret; 628 int v3 = (nfsd->nd_flag & ND_NFSV3); 629 uint32_t reqlen, len, cnt, left; 630 int padlen; 631 char *cp2; 632 struct mbuf *mb, *mreq; 633 struct vnode *vp; 634 nfsrvfh_t nsfh; 635 struct uio io, *uiop = &io; 636 struct vattr va; 637 off_t off; 638 u_quad_t frev; 639 640 nfsm_srvmtofh(&nsfh); 641 if (v3) { 642 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 643 off = fxdr_hyper(tl); 644 } else { 645 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 646 off = (off_t)fxdr_unsigned(u_int32_t, *tl); 647 } 648 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 649 reqlen = fxdr_unsigned(uint32_t, *tl); 650 reqlen = MIN(reqlen, NFS_SRVMAXDATA(nfsd)); 651 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 652 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 653 if (error) { 654 nfsm_reply(2 * NFSX_UNSIGNED); 655 nfsm_srvpostop_attr(1, (struct vattr *)0); 656 return (0); 657 } 658 if (vp->v_type != VREG) { 659 if (v3) 660 error = EINVAL; 661 else 662 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 663 } 664 if (!error) { 665 nqsrv_getl(vp, ND_READ); 666 if ((error = nfsrv_access(vp, VREAD, cred, rdonly, lwp, 1)) != 0) 667 error = nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 1); 668 } 669 getret = VOP_GETATTR(vp, &va, cred); 670 if (!error) 671 error = getret; 672 if (error) { 673 vput(vp); 674 nfsm_reply(NFSX_POSTOPATTR(v3)); 675 nfsm_srvpostop_attr(getret, &va); 676 return (0); 677 } 678 if (off >= va.va_size) 679 cnt = 0; 680 else if ((off + reqlen) > va.va_size) 681 cnt = va.va_size - off; 682 else 683 cnt = reqlen; 684 nfsm_reply(NFSX_POSTOPORFATTR(v3) + 3 * NFSX_UNSIGNED+nfsm_rndup(cnt)); 685 if (v3) { 686 nfsm_build(tl, u_int32_t *, NFSX_V3FATTR + 4 * NFSX_UNSIGNED); 687 *tl++ = nfs_true; 688 fp = (struct nfs_fattr *)tl; 689 tl += (NFSX_V3FATTR / sizeof (u_int32_t)); 690 } else { 691 nfsm_build(tl, u_int32_t *, NFSX_V2FATTR + NFSX_UNSIGNED); 692 fp = (struct nfs_fattr *)tl; 693 tl += (NFSX_V2FATTR / sizeof (u_int32_t)); 694 } 695 len = left = cnt; 696 if (cnt > 0) { 697 if (nfsd_use_loan) { 698 struct vm_page **pgpp; 699 voff_t pgoff = trunc_page(off); 700 int npages; 701 vaddr_t lva; 702 703 npages = (round_page(off + cnt) - pgoff) >> PAGE_SHIFT; 704 KASSERT(npages <= M_EXT_MAXPAGES); /* XXX */ 705 706 /* allocate kva for mbuf data */ 707 lva = sokvaalloc(pgoff, npages << PAGE_SHIFT, 708 slp->ns_so); 709 if (lva == 0) { 710 /* fall back to VOP_READ */ 711 goto loan_fail; 712 } 713 714 /* allocate mbuf */ 715 m = m_get(M_WAIT, MT_DATA); 716 MCLAIM(m, &nfs_mowner); 717 pgpp = m->m_ext.ext_pgs; 718 719 /* loan pages */ 720 error = uvm_loanuobjpages(&vp->v_uobj, pgoff, npages, 721 pgpp); 722 if (error) { 723 sokvafree(lva, npages << PAGE_SHIFT); 724 m_free(m); 725 if (error == EBUSY) 726 goto loan_fail; 727 goto read_error; 728 } 729 730 /* associate kva to mbuf */ 731 MEXTADD(m, (void *)(lva + ((vaddr_t)off & PAGE_MASK)), 732 cnt, M_MBUF, soloanfree, slp->ns_so); 733 m->m_flags |= M_EXT_PAGES | M_EXT_ROMAP; 734 m->m_len = cnt; 735 736 /* map pages */ 737 for (i = 0; i < npages; i++) { 738 pmap_kenter_pa(lva, VM_PAGE_TO_PHYS(pgpp[i]), 739 VM_PROT_READ, 0); 740 lva += PAGE_SIZE; 741 } 742 743 pmap_update(pmap_kernel()); 744 745 mb->m_next = m; 746 mb = m; 747 error = 0; 748 uiop->uio_resid = 0; 749 } else { 750 struct iovec *iv; 751 struct iovec *iv2; 752 struct mbuf *m2; 753 int siz; 754 loan_fail: 755 /* 756 * Generate the mbuf list with the uio_iov ref. to it. 757 */ 758 i = 0; 759 m = m2 = mb; 760 while (left > 0) { 761 siz = min(M_TRAILINGSPACE(m), left); 762 if (siz > 0) { 763 left -= siz; 764 i++; 765 } 766 if (left > 0) { 767 m = m_get(M_WAIT, MT_DATA); 768 MCLAIM(m, &nfs_mowner); 769 m_clget(m, M_WAIT); 770 m->m_len = 0; 771 m2->m_next = m; 772 m2 = m; 773 } 774 } 775 iv = malloc(i * sizeof(struct iovec), M_TEMP, M_WAITOK); 776 uiop->uio_iov = iv2 = iv; 777 m = mb; 778 left = cnt; 779 i = 0; 780 while (left > 0) { 781 if (m == NULL) 782 panic("nfsrv_read iov"); 783 siz = min(M_TRAILINGSPACE(m), left); 784 if (siz > 0) { 785 iv->iov_base = mtod(m, char *) + 786 m->m_len; 787 iv->iov_len = siz; 788 m->m_len += siz; 789 left -= siz; 790 iv++; 791 i++; 792 } 793 m = m->m_next; 794 } 795 uiop->uio_iovcnt = i; 796 uiop->uio_offset = off; 797 uiop->uio_resid = cnt; 798 uiop->uio_rw = UIO_READ; 799 UIO_SETUP_SYSSPACE(uiop); 800 error = VOP_READ(vp, uiop, IO_NODELOCKED, cred); 801 free((void *)iv2, M_TEMP); 802 } 803 read_error: 804 if (error || (getret = VOP_GETATTR(vp, &va, cred)) != 0){ 805 if (!error) 806 error = getret; 807 m_freem(mreq); 808 vput(vp); 809 nfsm_reply(NFSX_POSTOPATTR(v3)); 810 nfsm_srvpostop_attr(getret, &va); 811 return (0); 812 } 813 } else { 814 uiop->uio_resid = 0; 815 } 816 vput(vp); 817 nfsm_srvfillattr(&va, fp); 818 len -= uiop->uio_resid; 819 padlen = nfsm_padlen(len); 820 if (uiop->uio_resid || padlen) 821 nfs_zeropad(mb, uiop->uio_resid, padlen); 822 if (v3) { 823 /* count */ 824 *tl++ = txdr_unsigned(len); 825 /* eof */ 826 if (off + len >= va.va_size) 827 *tl++ = nfs_true; 828 else 829 *tl++ = nfs_false; 830 } 831 *tl = txdr_unsigned(len); 832 nfsm_srvdone; 833 } 834 835 /* 836 * nfs write service 837 */ 838 int 839 nfsrv_write(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 840 { 841 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 842 struct mbuf *nam = nfsd->nd_nam; 843 char *dpos = nfsd->nd_dpos; 844 kauth_cred_t cred = nfsd->nd_cr; 845 struct iovec *ivp; 846 int i, cnt; 847 struct mbuf *mp; 848 struct nfs_fattr *fp; 849 struct iovec *iv; 850 struct vattr va, forat; 851 u_int32_t *tl; 852 int32_t t1; 853 char *bpos; 854 int error = 0, rdonly, cache = 0, len, forat_ret = 1; 855 int ioflags, aftat_ret = 1, retlen, zeroing, adjust; 856 int stable = NFSV3WRITE_FILESYNC; 857 int v3 = (nfsd->nd_flag & ND_NFSV3); 858 char *cp2; 859 struct mbuf *mb, *mreq __unused; 860 struct vnode *vp; 861 nfsrvfh_t nsfh; 862 struct uio io, *uiop = &io; 863 off_t off; 864 u_quad_t frev; 865 866 if (mrep == NULL) { 867 *mrq = NULL; 868 return (0); 869 } 870 nfsm_srvmtofh(&nsfh); 871 if (v3) { 872 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 873 off = fxdr_hyper(tl); 874 tl += 3; 875 stable = fxdr_unsigned(int, *tl++); 876 } else { 877 nfsm_dissect(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 878 off = (off_t)fxdr_unsigned(u_int32_t, *++tl); 879 tl += 2; 880 } 881 retlen = len = fxdr_unsigned(int32_t, *tl); 882 cnt = i = 0; 883 884 /* 885 * For NFS Version 2, it is not obvious what a write of zero length 886 * should do, but I might as well be consistent with Version 3, 887 * which is to return ok so long as there are no permission problems. 888 */ 889 if (len > 0) { 890 zeroing = 1; 891 mp = mrep; 892 while (mp) { 893 if (mp == md) { 894 zeroing = 0; 895 adjust = dpos - mtod(mp, char *); 896 mp->m_len -= adjust; 897 if (mp->m_len > 0 && adjust > 0) 898 NFSMADV(mp, adjust); 899 } 900 if (zeroing) 901 mp->m_len = 0; 902 else if (mp->m_len > 0) { 903 i += mp->m_len; 904 if (i > len) { 905 mp->m_len -= (i - len); 906 zeroing = 1; 907 } 908 if (mp->m_len > 0) 909 cnt++; 910 } 911 mp = mp->m_next; 912 } 913 } 914 if (len > NFS_MAXDATA || len < 0 || i < len) { 915 error = EIO; 916 nfsm_reply(2 * NFSX_UNSIGNED); 917 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 918 return (0); 919 } 920 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 921 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 922 if (error) { 923 nfsm_reply(2 * NFSX_UNSIGNED); 924 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 925 return (0); 926 } 927 if (v3) 928 forat_ret = VOP_GETATTR(vp, &forat, cred); 929 if (vp->v_type != VREG) { 930 if (v3) 931 error = EINVAL; 932 else 933 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 934 } 935 if (!error) { 936 nqsrv_getl(vp, ND_WRITE); 937 error = nfsrv_access(vp, VWRITE, cred, rdonly, lwp, 1); 938 } 939 if (error) { 940 vput(vp); 941 nfsm_reply(NFSX_WCCDATA(v3)); 942 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 943 return (0); 944 } 945 946 if (len > 0) { 947 ivp = malloc(cnt * sizeof (struct iovec), M_TEMP, M_WAITOK); 948 uiop->uio_iov = iv = ivp; 949 uiop->uio_iovcnt = cnt; 950 mp = mrep; 951 while (mp) { 952 if (mp->m_len > 0) { 953 ivp->iov_base = mtod(mp, void *); 954 ivp->iov_len = mp->m_len; 955 ivp++; 956 } 957 mp = mp->m_next; 958 } 959 960 /* 961 * XXX 962 * The IO_METASYNC flag indicates that all metadata (and not 963 * just enough to ensure data integrity) must be written to 964 * stable storage synchronously. 965 * (IO_METASYNC is not yet implemented in 4.4BSD-Lite.) 966 */ 967 if (stable == NFSV3WRITE_UNSTABLE) 968 ioflags = IO_NODELOCKED; 969 else if (stable == NFSV3WRITE_DATASYNC) 970 ioflags = (IO_SYNC | IO_NODELOCKED); 971 else 972 ioflags = (IO_METASYNC | IO_SYNC | IO_NODELOCKED); 973 uiop->uio_resid = len; 974 uiop->uio_rw = UIO_WRITE; 975 uiop->uio_offset = off; 976 UIO_SETUP_SYSSPACE(uiop); 977 error = VOP_WRITE(vp, uiop, ioflags, cred); 978 nfsstats.srvvop_writes++; 979 free(iv, M_TEMP); 980 } 981 aftat_ret = VOP_GETATTR(vp, &va, cred); 982 vput(vp); 983 if (!error) 984 error = aftat_ret; 985 nfsm_reply(NFSX_PREOPATTR(v3) + NFSX_POSTOPORFATTR(v3) + 986 2 * NFSX_UNSIGNED + NFSX_WRITEVERF(v3)); 987 if (v3) { 988 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 989 if (error) 990 return (0); 991 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 992 *tl++ = txdr_unsigned(retlen); 993 if (stable == NFSV3WRITE_UNSTABLE) 994 *tl++ = txdr_unsigned(stable); 995 else 996 *tl++ = txdr_unsigned(NFSV3WRITE_FILESYNC); 997 /* 998 * Actually, there is no need to txdr these fields, 999 * but it may make the values more human readable, 1000 * for debugging purposes. 1001 */ 1002 *tl++ = txdr_unsigned(boottime.tv_sec); 1003 *tl = txdr_unsigned(boottime.tv_nsec / 1000); 1004 } else { 1005 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 1006 nfsm_srvfillattr(&va, fp); 1007 } 1008 nfsm_srvdone; 1009 } 1010 1011 /* 1012 * XXX elad: the original NFSW_SAMECRED() macro also made sure the 1013 * two nd_flag fields of the descriptors contained 1014 * ND_KERBAUTH. 1015 */ 1016 static int 1017 nfsrv_samecred(kauth_cred_t cred1, kauth_cred_t cred2) 1018 { 1019 int i, do_ngroups; 1020 1021 if (kauth_cred_geteuid(cred1) != kauth_cred_geteuid(cred2)) 1022 return (0); 1023 if (kauth_cred_ngroups(cred1) != kauth_cred_ngroups(cred2)) 1024 return (0); 1025 do_ngroups = kauth_cred_ngroups(cred1); 1026 for (i = 0; i < do_ngroups; i++) 1027 if (kauth_cred_group(cred1, i) != 1028 kauth_cred_group(cred2, i)) 1029 return (0); 1030 1031 return (1); 1032 } 1033 1034 static struct nfsrvw_delayhash * 1035 nfsrv_nwdelayhash(struct nfssvc_sock *slp, const nfsrvfh_t *nsfh) 1036 { 1037 uint32_t hash; 1038 1039 hash = hash32_buf(NFSRVFH_DATA(nsfh), NFSRVFH_SIZE(nsfh), 1040 HASH32_BUF_INIT); 1041 return &slp->ns_wdelayhashtbl[hash % NFS_WDELAYHASHSIZ]; 1042 } 1043 1044 /* 1045 * NFS write service with write gathering support. Called when 1046 * nfsrvw_procrastinate > 0. 1047 * See: Chet Juszczak, "Improving the Write Performance of an NFS Server", 1048 * in Proc. of the Winter 1994 Usenix Conference, pg. 247-259, San Franscisco, 1049 * Jan. 1994. 1050 */ 1051 int 1052 nfsrv_writegather(struct nfsrv_descript **ndp, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 1053 { 1054 struct timeval now; 1055 struct iovec *ivp; 1056 struct mbuf *mp; 1057 struct nfsrv_descript *wp, *nfsd, *owp, *swp; 1058 struct nfs_fattr *fp; 1059 int i = 0; 1060 struct iovec *iov; 1061 struct nfsrvw_delayhash *wpp; 1062 kauth_cred_t cred; 1063 struct vattr va, forat; 1064 u_int32_t *tl; 1065 int32_t t1; 1066 char *bpos, *dpos; 1067 int error = 0, rdonly, cache = 0, len = 0, forat_ret = 1; 1068 int ioflags, aftat_ret = 1, adjust, v3, zeroing; 1069 char *cp2; 1070 struct mbuf *mb, *mreq, *mrep, *md; 1071 struct vnode *vp; 1072 struct uio io, *uiop = &io; 1073 u_quad_t frev, cur_usec; 1074 1075 *mrq = NULL; 1076 if (*ndp) { 1077 nfsd = *ndp; 1078 *ndp = NULL; 1079 mrep = nfsd->nd_mrep; 1080 md = nfsd->nd_md; 1081 dpos = nfsd->nd_dpos; 1082 cred = nfsd->nd_cr; 1083 v3 = (nfsd->nd_flag & ND_NFSV3); 1084 LIST_INIT(&nfsd->nd_coalesce); 1085 nfsd->nd_mreq = NULL; 1086 nfsd->nd_stable = NFSV3WRITE_FILESYNC; 1087 getmicrotime(&now); 1088 cur_usec = (u_quad_t)now.tv_sec * 1000000 + (u_quad_t)now.tv_usec; 1089 nfsd->nd_time = cur_usec + nfsrvw_procrastinate; 1090 1091 /* 1092 * Now, get the write header.. 1093 */ 1094 nfsm_srvmtofh(&nfsd->nd_fh); 1095 if (v3) { 1096 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 1097 nfsd->nd_off = fxdr_hyper(tl); 1098 tl += 3; 1099 nfsd->nd_stable = fxdr_unsigned(int, *tl++); 1100 } else { 1101 nfsm_dissect(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1102 nfsd->nd_off = (off_t)fxdr_unsigned(u_int32_t, *++tl); 1103 tl += 2; 1104 } 1105 len = fxdr_unsigned(int32_t, *tl); 1106 nfsd->nd_len = len; 1107 nfsd->nd_eoff = nfsd->nd_off + len; 1108 1109 /* 1110 * Trim the header out of the mbuf list and trim off any trailing 1111 * junk so that the mbuf list has only the write data. 1112 */ 1113 zeroing = 1; 1114 i = 0; 1115 mp = mrep; 1116 while (mp) { 1117 if (mp == md) { 1118 zeroing = 0; 1119 adjust = dpos - mtod(mp, char *); 1120 mp->m_len -= adjust; 1121 if (mp->m_len > 0 && adjust > 0) 1122 NFSMADV(mp, adjust); 1123 } 1124 if (zeroing) 1125 mp->m_len = 0; 1126 else { 1127 i += mp->m_len; 1128 if (i > len) { 1129 mp->m_len -= (i - len); 1130 zeroing = 1; 1131 } 1132 } 1133 mp = mp->m_next; 1134 } 1135 if (len > NFS_MAXDATA || len < 0 || i < len) { 1136 nfsmout: 1137 m_freem(mrep); 1138 error = EIO; 1139 nfsm_writereply(2 * NFSX_UNSIGNED, v3); 1140 if (v3) 1141 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1142 nfsd->nd_mreq = mreq; 1143 nfsd->nd_mrep = NULL; 1144 nfsd->nd_time = 0; 1145 } 1146 1147 /* 1148 * Add this entry to the hash and time queues. 1149 */ 1150 owp = NULL; 1151 mutex_enter(&nfsd_lock); 1152 wp = LIST_FIRST(&slp->ns_tq); 1153 while (wp && wp->nd_time < nfsd->nd_time) { 1154 owp = wp; 1155 wp = LIST_NEXT(wp, nd_tq); 1156 } 1157 if (owp) { 1158 LIST_INSERT_AFTER(owp, nfsd, nd_tq); 1159 } else { 1160 LIST_INSERT_HEAD(&slp->ns_tq, nfsd, nd_tq); 1161 } 1162 if (nfsd->nd_mrep) { 1163 wpp = nfsrv_nwdelayhash(slp, &nfsd->nd_fh); 1164 owp = NULL; 1165 wp = LIST_FIRST(wpp); 1166 while (wp && nfsrv_comparefh(&nfsd->nd_fh, &wp->nd_fh)) { 1167 owp = wp; 1168 wp = LIST_NEXT(wp, nd_hash); 1169 } 1170 while (wp && wp->nd_off < nfsd->nd_off && 1171 !nfsrv_comparefh(&nfsd->nd_fh, &wp->nd_fh)) { 1172 owp = wp; 1173 wp = LIST_NEXT(wp, nd_hash); 1174 } 1175 if (owp) { 1176 LIST_INSERT_AFTER(owp, nfsd, nd_hash); 1177 1178 /* 1179 * Search the hash list for overlapping entries and 1180 * coalesce. 1181 */ 1182 for(; nfsd && NFSW_CONTIG(owp, nfsd); nfsd = wp) { 1183 wp = LIST_NEXT(nfsd, nd_hash); 1184 if (nfsrv_samecred(owp->nd_cr, nfsd->nd_cr)) 1185 nfsrvw_coalesce(owp, nfsd); 1186 } 1187 } else { 1188 LIST_INSERT_HEAD(wpp, nfsd, nd_hash); 1189 } 1190 } 1191 mutex_exit(&nfsd_lock); 1192 } 1193 1194 /* 1195 * Now, do VOP_WRITE()s for any one(s) that need to be done now 1196 * and generate the associated reply mbuf list(s). 1197 */ 1198 loop1: 1199 getmicrotime(&now); 1200 cur_usec = (u_quad_t)now.tv_sec * 1000000 + (u_quad_t)now.tv_usec; 1201 mutex_enter(&nfsd_lock); 1202 for (nfsd = LIST_FIRST(&slp->ns_tq); nfsd; nfsd = owp) { 1203 owp = LIST_NEXT(nfsd, nd_tq); 1204 if (nfsd->nd_time > cur_usec) 1205 break; 1206 if (nfsd->nd_mreq) 1207 continue; 1208 LIST_REMOVE(nfsd, nd_tq); 1209 LIST_REMOVE(nfsd, nd_hash); 1210 mutex_exit(&nfsd_lock); 1211 1212 mrep = nfsd->nd_mrep; 1213 nfsd->nd_mrep = NULL; 1214 cred = nfsd->nd_cr; 1215 v3 = (nfsd->nd_flag & ND_NFSV3); 1216 forat_ret = aftat_ret = 1; 1217 error = nfsrv_fhtovp(&nfsd->nd_fh, 1, &vp, cred, slp, 1218 nfsd->nd_nam, &rdonly, (nfsd->nd_flag & ND_KERBAUTH), 1219 false); 1220 if (!error) { 1221 if (v3) 1222 forat_ret = VOP_GETATTR(vp, &forat, cred); 1223 if (vp->v_type != VREG) { 1224 if (v3) 1225 error = EINVAL; 1226 else 1227 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 1228 } 1229 } else 1230 vp = NULL; 1231 if (!error) { 1232 nqsrv_getl(vp, ND_WRITE); 1233 error = nfsrv_access(vp, VWRITE, cred, rdonly, lwp, 1); 1234 } 1235 1236 if (nfsd->nd_stable == NFSV3WRITE_UNSTABLE) 1237 ioflags = IO_NODELOCKED; 1238 else if (nfsd->nd_stable == NFSV3WRITE_DATASYNC) 1239 ioflags = (IO_SYNC | IO_NODELOCKED); 1240 else 1241 ioflags = (IO_METASYNC | IO_SYNC | IO_NODELOCKED); 1242 uiop->uio_rw = UIO_WRITE; 1243 uiop->uio_offset = nfsd->nd_off; 1244 uiop->uio_resid = nfsd->nd_eoff - nfsd->nd_off; 1245 UIO_SETUP_SYSSPACE(uiop); 1246 if (uiop->uio_resid > 0) { 1247 mp = mrep; 1248 i = 0; 1249 while (mp) { 1250 if (mp->m_len > 0) 1251 i++; 1252 mp = mp->m_next; 1253 } 1254 uiop->uio_iovcnt = i; 1255 iov = malloc(i * sizeof (struct iovec), M_TEMP, M_WAITOK); 1256 uiop->uio_iov = ivp = iov; 1257 mp = mrep; 1258 while (mp) { 1259 if (mp->m_len > 0) { 1260 ivp->iov_base = mtod(mp, void *); 1261 ivp->iov_len = mp->m_len; 1262 ivp++; 1263 } 1264 mp = mp->m_next; 1265 } 1266 if (!error) { 1267 error = VOP_WRITE(vp, uiop, ioflags, cred); 1268 nfsstats.srvvop_writes++; 1269 } 1270 free((void *)iov, M_TEMP); 1271 } 1272 m_freem(mrep); 1273 if (vp) { 1274 aftat_ret = VOP_GETATTR(vp, &va, cred); 1275 vput(vp); 1276 } 1277 1278 /* 1279 * Loop around generating replies for all write rpcs that have 1280 * now been completed. 1281 */ 1282 swp = nfsd; 1283 do { 1284 if (error) { 1285 nfsm_writereply(NFSX_WCCDATA(v3), v3); 1286 if (v3) { 1287 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1288 } 1289 } else { 1290 nfsm_writereply(NFSX_PREOPATTR(v3) + 1291 NFSX_POSTOPORFATTR(v3) + 2 * NFSX_UNSIGNED + 1292 NFSX_WRITEVERF(v3), v3); 1293 if (v3) { 1294 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1295 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1296 *tl++ = txdr_unsigned(nfsd->nd_len); 1297 *tl++ = txdr_unsigned(swp->nd_stable); 1298 /* 1299 * Actually, there is no need to txdr these fields, 1300 * but it may make the values more human readable, 1301 * for debugging purposes. 1302 */ 1303 *tl++ = txdr_unsigned(boottime.tv_sec); 1304 *tl = txdr_unsigned(boottime.tv_nsec / 1000); 1305 } else { 1306 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 1307 nfsm_srvfillattr(&va, fp); 1308 } 1309 } 1310 nfsd->nd_mreq = mreq; 1311 if (nfsd->nd_mrep) 1312 panic("nfsrv_write: nd_mrep not free"); 1313 1314 /* 1315 * Done. Put it at the head of the timer queue so that 1316 * the final phase can return the reply. 1317 */ 1318 mutex_enter(&nfsd_lock); 1319 if (nfsd != swp) { 1320 nfsd->nd_time = 0; 1321 LIST_INSERT_HEAD(&slp->ns_tq, nfsd, nd_tq); 1322 } 1323 nfsd = LIST_FIRST(&swp->nd_coalesce); 1324 if (nfsd) { 1325 LIST_REMOVE(nfsd, nd_tq); 1326 } 1327 mutex_exit(&nfsd_lock); 1328 } while (nfsd); 1329 swp->nd_time = 0; 1330 1331 mutex_enter(&nfsd_lock); 1332 LIST_INSERT_HEAD(&slp->ns_tq, swp, nd_tq); 1333 mutex_exit(&nfsd_lock); 1334 goto loop1; 1335 } 1336 mutex_exit(&nfsd_lock); 1337 nfs_timer_start(); 1338 1339 /* 1340 * Search for a reply to return. 1341 */ 1342 mutex_enter(&nfsd_lock); 1343 LIST_FOREACH(nfsd, &slp->ns_tq, nd_tq) { 1344 if (nfsd->nd_mreq) { 1345 LIST_REMOVE(nfsd, nd_tq); 1346 *mrq = nfsd->nd_mreq; 1347 *ndp = nfsd; 1348 break; 1349 } 1350 } 1351 mutex_exit(&nfsd_lock); 1352 return (0); 1353 } 1354 1355 /* 1356 * Coalesce the write request nfsd into owp. To do this we must: 1357 * - remove nfsd from the queues 1358 * - merge nfsd->nd_mrep into owp->nd_mrep 1359 * - update the nd_eoff and nd_stable for owp 1360 * - put nfsd on owp's nd_coalesce list 1361 * NB: Must be called at splsoftclock(). 1362 */ 1363 void 1364 nfsrvw_coalesce(struct nfsrv_descript *owp, struct nfsrv_descript *nfsd) 1365 { 1366 int overlap; 1367 struct mbuf *mp; 1368 struct nfsrv_descript *m; 1369 1370 KASSERT(mutex_owned(&nfsd_lock)); 1371 1372 LIST_REMOVE(nfsd, nd_hash); 1373 LIST_REMOVE(nfsd, nd_tq); 1374 if (owp->nd_eoff < nfsd->nd_eoff) { 1375 overlap = owp->nd_eoff - nfsd->nd_off; 1376 if (overlap < 0) 1377 panic("nfsrv_coalesce: bad off"); 1378 if (overlap > 0) 1379 m_adj(nfsd->nd_mrep, overlap); 1380 mp = owp->nd_mrep; 1381 while (mp->m_next) 1382 mp = mp->m_next; 1383 mp->m_next = nfsd->nd_mrep; 1384 owp->nd_eoff = nfsd->nd_eoff; 1385 } else 1386 m_freem(nfsd->nd_mrep); 1387 nfsd->nd_mrep = NULL; 1388 if (nfsd->nd_stable == NFSV3WRITE_FILESYNC) 1389 owp->nd_stable = NFSV3WRITE_FILESYNC; 1390 else if (nfsd->nd_stable == NFSV3WRITE_DATASYNC && 1391 owp->nd_stable == NFSV3WRITE_UNSTABLE) 1392 owp->nd_stable = NFSV3WRITE_DATASYNC; 1393 LIST_INSERT_HEAD(&owp->nd_coalesce, nfsd, nd_tq); 1394 /* 1395 * nfsd might hold coalesce elements! Move them to owp. 1396 * Otherwise, requests may be lost and clients will be stuck. 1397 */ 1398 while ((m = LIST_FIRST(&nfsd->nd_coalesce)) != NULL) { 1399 LIST_REMOVE(m, nd_tq); 1400 LIST_INSERT_HEAD(&owp->nd_coalesce, m, nd_tq); 1401 } 1402 } 1403 1404 /* 1405 * nfs create service 1406 * now does a truncate to 0 length via. setattr if it already exists 1407 */ 1408 int 1409 nfsrv_create(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 1410 { 1411 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1412 struct mbuf *nam = nfsd->nd_nam; 1413 char *dpos = nfsd->nd_dpos; 1414 kauth_cred_t cred = nfsd->nd_cr; 1415 struct nfs_fattr *fp; 1416 struct vattr va, dirfor, diraft; 1417 struct nfsv2_sattr *sp; 1418 u_int32_t *tl; 1419 struct nameidata nd; 1420 char *cp; 1421 int32_t t1; 1422 char *bpos; 1423 int error = 0, cache = 0, len, tsize, dirfor_ret = 1, diraft_ret = 1; 1424 int rdev = 0, abort = 0; 1425 int v3 = (nfsd->nd_flag & ND_NFSV3), how, exclusive_flag = 0; 1426 char *cp2; 1427 struct mbuf *mb, *mreq __unused; 1428 struct vnode *vp = NULL, *dirp = NULL; 1429 nfsrvfh_t nsfh; 1430 u_quad_t frev, tempsize; 1431 u_char cverf[NFSX_V3CREATEVERF]; 1432 1433 nd.ni_cnd.cn_nameiop = 0; 1434 nfsm_srvmtofh(&nsfh); 1435 nfsm_srvnamesiz(len); 1436 nd.ni_cnd.cn_cred = cred; 1437 nd.ni_cnd.cn_nameiop = CREATE; 1438 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 1439 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 1440 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 1441 if (dirp && v3) { 1442 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); 1443 } 1444 if (error) { 1445 nfsm_reply(NFSX_WCCDATA(v3)); 1446 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1447 if (dirp) 1448 vrele(dirp); 1449 if (nd.ni_pathbuf != NULL) { 1450 pathbuf_destroy(nd.ni_pathbuf); 1451 nd.ni_pathbuf = NULL; 1452 } 1453 return (0); 1454 } 1455 abort = 1; 1456 vattr_null(&va); 1457 if (v3) { 1458 va.va_mode = 0; 1459 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1460 how = fxdr_unsigned(int, *tl); 1461 switch (how) { 1462 case NFSV3CREATE_GUARDED: 1463 if (nd.ni_vp) { 1464 error = EEXIST; 1465 break; 1466 } 1467 case NFSV3CREATE_UNCHECKED: 1468 nfsm_srvsattr(&va); 1469 break; 1470 case NFSV3CREATE_EXCLUSIVE: 1471 nfsm_dissect(cp, void *, NFSX_V3CREATEVERF); 1472 memcpy(cverf, cp, NFSX_V3CREATEVERF); 1473 exclusive_flag = 1; 1474 break; 1475 }; 1476 va.va_type = VREG; 1477 } else { 1478 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1479 va.va_type = IFTOVT(fxdr_unsigned(u_int32_t, sp->sa_mode)); 1480 if (va.va_type == VNON) 1481 va.va_type = VREG; 1482 va.va_mode = nfstov_mode(sp->sa_mode); 1483 switch (va.va_type) { 1484 case VREG: 1485 tsize = fxdr_unsigned(int32_t, sp->sa_size); 1486 if (tsize != -1) 1487 va.va_size = (u_quad_t)tsize; 1488 break; 1489 case VCHR: 1490 case VBLK: 1491 case VFIFO: 1492 rdev = fxdr_unsigned(int32_t, sp->sa_size); 1493 break; 1494 default: 1495 break; 1496 }; 1497 } 1498 1499 /* 1500 * Iff doesn't exist, create it 1501 * otherwise just truncate to 0 length 1502 * should I set the mode too ?? 1503 */ 1504 if (nd.ni_vp == NULL) { 1505 if (va.va_type == VREG || va.va_type == VSOCK) { 1506 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1507 error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1508 if (!error) { 1509 vn_lock(nd.ni_vp, LK_EXCLUSIVE | LK_RETRY); 1510 if (exclusive_flag) { 1511 exclusive_flag = 0; 1512 vattr_null(&va); 1513 /* 1514 * XXX 1515 * assuming NFSX_V3CREATEVERF 1516 * == sizeof(nfstime3) 1517 */ 1518 fxdr_nfsv3time(cverf, &va.va_atime); 1519 error = VOP_SETATTR(nd.ni_vp, &va, 1520 cred); 1521 } 1522 } 1523 } else if (va.va_type == VCHR || va.va_type == VBLK || 1524 va.va_type == VFIFO) { 1525 if (va.va_type == VCHR && rdev == 0xffffffff) 1526 va.va_type = VFIFO; 1527 if (va.va_type != VFIFO && 1528 (error = kauth_authorize_system(cred, 1529 KAUTH_SYSTEM_MKNOD, 0, NULL, NULL, NULL))) { 1530 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1531 vput(nd.ni_dvp); 1532 abort = 0; 1533 nfsm_reply(0); 1534 if (nd.ni_pathbuf != NULL) { 1535 pathbuf_destroy(nd.ni_pathbuf); 1536 nd.ni_pathbuf = NULL; 1537 } 1538 return (error); 1539 } else 1540 va.va_rdev = (dev_t)rdev; 1541 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1542 error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, 1543 &va); 1544 if (!error) { 1545 vn_lock(nd.ni_vp, LK_EXCLUSIVE | LK_RETRY); 1546 } else { 1547 nfsm_reply(0); 1548 } 1549 } else { 1550 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1551 if (nd.ni_pathbuf != NULL) { 1552 pathbuf_destroy(nd.ni_pathbuf); 1553 nd.ni_pathbuf = NULL; 1554 } 1555 error = ENXIO; 1556 abort = 0; 1557 } 1558 vp = nd.ni_vp; 1559 } else { 1560 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1561 if (nd.ni_pathbuf != NULL) { 1562 pathbuf_destroy(nd.ni_pathbuf); 1563 nd.ni_pathbuf = NULL; 1564 } 1565 vp = nd.ni_vp; 1566 abort = 0; 1567 if (!error && va.va_size != -1) { 1568 error = nfsrv_access(vp, VWRITE, cred, 1569 (nd.ni_cnd.cn_flags & RDONLY), lwp, 0); 1570 if (!error) { 1571 nqsrv_getl(vp, ND_WRITE); 1572 tempsize = va.va_size; 1573 vattr_null(&va); 1574 va.va_size = tempsize; 1575 error = VOP_SETATTR(vp, &va, cred); 1576 } 1577 } 1578 if (error) 1579 vput(vp); 1580 } 1581 if (!error) { 1582 error = nfsrv_composefh(vp, &nsfh, v3); 1583 if (!error) 1584 error = VOP_GETATTR(vp, &va, cred); 1585 vput(vp); 1586 } 1587 if (nd.ni_dvp == vp) 1588 vrele(nd.ni_dvp); 1589 else 1590 vput(nd.ni_dvp); 1591 if (v3) { 1592 if (exclusive_flag && !error) { 1593 /* 1594 * XXX assuming NFSX_V3CREATEVERF == sizeof(nfstime3) 1595 */ 1596 char oldverf[NFSX_V3CREATEVERF]; 1597 1598 txdr_nfsv3time(&va.va_atime, oldverf); 1599 if (memcmp(cverf, oldverf, NFSX_V3CREATEVERF)) 1600 error = EEXIST; 1601 } 1602 if (dirp) { 1603 vn_lock(dirp, LK_SHARED | LK_RETRY); 1604 diraft_ret = VOP_GETATTR(dirp, &diraft, cred); 1605 VOP_UNLOCK(dirp); 1606 } 1607 } 1608 if (dirp) { 1609 vrele(dirp); 1610 dirp = NULL; 1611 } 1612 if (nd.ni_pathbuf != NULL) { 1613 pathbuf_destroy(nd.ni_pathbuf); 1614 nd.ni_pathbuf = NULL; 1615 } 1616 abort = 0; 1617 nfsm_reply(NFSX_SRVFH(&nsfh, v3) + NFSX_FATTR(v3) + NFSX_WCCDATA(v3)); 1618 if (v3) { 1619 if (!error) { 1620 nfsm_srvpostop_fh(&nsfh); 1621 nfsm_srvpostop_attr(0, &va); 1622 } 1623 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1624 } else { 1625 nfsm_srvfhtom(&nsfh, v3); 1626 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 1627 nfsm_srvfillattr(&va, fp); 1628 } 1629 return (0); 1630 nfsmout: 1631 if (dirp) 1632 vrele(dirp); 1633 if (abort) { 1634 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1635 if (nd.ni_dvp == nd.ni_vp) 1636 vrele(nd.ni_dvp); 1637 else 1638 vput(nd.ni_dvp); 1639 if (nd.ni_vp) 1640 vput(nd.ni_vp); 1641 if (nd.ni_pathbuf != NULL) { 1642 pathbuf_destroy(nd.ni_pathbuf); 1643 nd.ni_pathbuf = NULL; 1644 } 1645 } 1646 return (error); 1647 } 1648 1649 /* 1650 * nfs v3 mknod service 1651 */ 1652 int 1653 nfsrv_mknod(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 1654 { 1655 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1656 struct mbuf *nam = nfsd->nd_nam; 1657 char *dpos = nfsd->nd_dpos; 1658 kauth_cred_t cred = nfsd->nd_cr; 1659 struct vattr va, dirfor, diraft; 1660 u_int32_t *tl; 1661 struct nameidata nd; 1662 int32_t t1; 1663 char *bpos; 1664 int error = 0, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 1665 int abort = 0; 1666 u_int32_t major, minor; 1667 enum vtype vtyp; 1668 char *cp2; 1669 struct mbuf *mb, *mreq __unused; 1670 struct vnode *vp, *dirp = (struct vnode *)0; 1671 nfsrvfh_t nsfh; 1672 u_quad_t frev; 1673 1674 nd.ni_cnd.cn_nameiop = 0; 1675 nfsm_srvmtofh(&nsfh); 1676 nfsm_srvnamesiz(len); 1677 nd.ni_cnd.cn_cred = cred; 1678 nd.ni_cnd.cn_nameiop = CREATE; 1679 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 1680 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 1681 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 1682 if (dirp) 1683 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); 1684 if (error) { 1685 nfsm_reply(NFSX_WCCDATA(1)); 1686 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1687 if (dirp) 1688 vrele(dirp); 1689 if (nd.ni_pathbuf != NULL) { 1690 pathbuf_destroy(nd.ni_pathbuf); 1691 nd.ni_pathbuf = NULL; 1692 } 1693 return (0); 1694 } 1695 abort = 1; 1696 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1697 vtyp = nfsv3tov_type(*tl); 1698 if (vtyp != VCHR && vtyp != VBLK && vtyp != VSOCK && vtyp != VFIFO) { 1699 error = NFSERR_BADTYPE; 1700 goto abort; 1701 } 1702 vattr_null(&va); 1703 va.va_mode = 0; 1704 nfsm_srvsattr(&va); 1705 if (vtyp == VCHR || vtyp == VBLK) { 1706 dev_t rdev; 1707 1708 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1709 major = fxdr_unsigned(u_int32_t, *tl++); 1710 minor = fxdr_unsigned(u_int32_t, *tl); 1711 rdev = makedev(major, minor); 1712 if (major(rdev) != major || minor(rdev) != minor) { 1713 error = EINVAL; 1714 goto abort; 1715 } 1716 va.va_rdev = rdev; 1717 } 1718 1719 /* 1720 * Iff doesn't exist, create it. 1721 */ 1722 if (nd.ni_vp) { 1723 error = EEXIST; 1724 abort: 1725 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1726 if (nd.ni_vp) 1727 vput(nd.ni_vp); 1728 if (nd.ni_pathbuf != NULL) { 1729 pathbuf_destroy(nd.ni_pathbuf); 1730 nd.ni_pathbuf = NULL; 1731 } 1732 goto out; 1733 } 1734 va.va_type = vtyp; 1735 if (vtyp == VSOCK) { 1736 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1737 error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1738 } else { 1739 if (va.va_type != VFIFO && 1740 (error = kauth_authorize_system(cred, 1741 KAUTH_SYSTEM_MKNOD, 0, NULL, NULL, NULL))) { 1742 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1743 vput(nd.ni_dvp); 1744 goto out; 1745 } 1746 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1747 error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1748 if (error) 1749 goto out; 1750 } 1751 if (!error) { 1752 vn_lock(nd.ni_vp, LK_EXCLUSIVE | LK_RETRY); 1753 } 1754 out: 1755 vp = nd.ni_vp; 1756 if (!error) { 1757 error = nfsrv_composefh(vp, &nsfh, true); 1758 if (!error) 1759 error = VOP_GETATTR(vp, &va, cred); 1760 vput(vp); 1761 } 1762 if (nd.ni_dvp == nd.ni_vp) 1763 vrele(nd.ni_dvp); 1764 else 1765 vput(nd.ni_dvp); 1766 if (dirp) { 1767 vn_lock(dirp, LK_SHARED | LK_RETRY); 1768 diraft_ret = VOP_GETATTR(dirp, &diraft, cred); 1769 VOP_UNLOCK(dirp); 1770 vrele(dirp); 1771 dirp = NULL; 1772 } 1773 if (nd.ni_pathbuf != NULL) { 1774 pathbuf_destroy(nd.ni_pathbuf); 1775 nd.ni_pathbuf = NULL; 1776 } 1777 abort = 0; 1778 nfsm_reply(NFSX_SRVFH(&nsfh, true) + NFSX_POSTOPATTR(1) + 1779 NFSX_WCCDATA(1)); 1780 if (!error) { 1781 nfsm_srvpostop_fh(&nsfh); 1782 nfsm_srvpostop_attr(0, &va); 1783 } 1784 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1785 return (0); 1786 nfsmout: 1787 if (abort) { 1788 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1789 if (nd.ni_dvp == nd.ni_vp) 1790 vrele(nd.ni_dvp); 1791 else 1792 vput(nd.ni_dvp); 1793 if (nd.ni_vp) 1794 vput(nd.ni_vp); 1795 if (nd.ni_pathbuf != NULL) { 1796 pathbuf_destroy(nd.ni_pathbuf); 1797 nd.ni_pathbuf = NULL; 1798 } 1799 } 1800 if (dirp) 1801 vrele(dirp); 1802 return (error); 1803 } 1804 1805 /* 1806 * nfs remove service 1807 */ 1808 int 1809 nfsrv_remove(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 1810 { 1811 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1812 struct mbuf *nam = nfsd->nd_nam; 1813 char *dpos = nfsd->nd_dpos; 1814 kauth_cred_t cred = nfsd->nd_cr; 1815 struct nameidata nd; 1816 u_int32_t *tl; 1817 int32_t t1; 1818 char *bpos; 1819 int error = 0, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 1820 int v3 = (nfsd->nd_flag & ND_NFSV3); 1821 char *cp2; 1822 struct mbuf *mb, *mreq __unused; 1823 struct vnode *vp, *dirp; 1824 struct vattr dirfor, diraft; 1825 nfsrvfh_t nsfh; 1826 u_quad_t frev; 1827 1828 #ifndef nolint 1829 vp = (struct vnode *)0; 1830 #endif 1831 nfsm_srvmtofh(&nsfh); 1832 nfsm_srvnamesiz(len); 1833 nd.ni_cnd.cn_cred = cred; 1834 nd.ni_cnd.cn_nameiop = DELETE; 1835 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 1836 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 1837 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 1838 if (error == 0 && dirp && v3) { 1839 if (nd.ni_dvp == nd.ni_vp) 1840 vn_lock(dirp, LK_SHARED | LK_RETRY); 1841 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); 1842 if (nd.ni_dvp == nd.ni_vp) 1843 VOP_UNLOCK(dirp); 1844 } 1845 if (!error) { 1846 vp = nd.ni_vp; 1847 if (vp->v_type == VDIR) { 1848 error = EPERM; 1849 goto out; 1850 } 1851 /* 1852 * The root of a mounted filesystem cannot be deleted. 1853 */ 1854 if (vp->v_vflag & VV_ROOT) { 1855 error = EBUSY; 1856 } 1857 out: 1858 if (!error) { 1859 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1860 nqsrv_getl(vp, ND_WRITE); 1861 error = VOP_REMOVE(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); 1862 vput(nd.ni_dvp); 1863 } else { 1864 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1865 if (nd.ni_dvp == vp) 1866 vrele(nd.ni_dvp); 1867 else 1868 vput(nd.ni_dvp); 1869 vput(vp); 1870 } 1871 } 1872 if (nd.ni_pathbuf != NULL) { 1873 pathbuf_destroy(nd.ni_pathbuf); 1874 nd.ni_pathbuf = NULL; 1875 } 1876 if (dirp) { 1877 if (v3) { 1878 vn_lock(dirp, LK_SHARED | LK_RETRY); 1879 diraft_ret = VOP_GETATTR(dirp, &diraft, cred); 1880 VOP_UNLOCK(dirp); 1881 } 1882 vrele(dirp); 1883 } 1884 nfsm_reply(NFSX_WCCDATA(v3)); 1885 if (v3) { 1886 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1887 return (0); 1888 } 1889 nfsm_srvdone; 1890 } 1891 1892 /* 1893 * nfs rename service 1894 */ 1895 int 1896 nfsrv_rename(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 1897 { 1898 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1899 struct mbuf *nam = nfsd->nd_nam; 1900 char *dpos = nfsd->nd_dpos; 1901 kauth_cred_t cred = nfsd->nd_cr; 1902 u_int32_t *tl; 1903 int32_t t1; 1904 char *bpos; 1905 int error = 0, cache = 0, fdirfor_ret = 1, fdiraft_ret = 1; 1906 uint32_t len, len2; 1907 int tdirfor_ret = 1, tdiraft_ret = 1; 1908 int v3 = (nfsd->nd_flag & ND_NFSV3); 1909 char *cp2; 1910 struct mbuf *mb, *mreq __unused; 1911 struct nameidata fromnd, tond; 1912 struct vnode *fvp, *tvp, *tdvp; 1913 struct vnode *fdirp = NULL, *tdirp = NULL; 1914 struct mount *localfs = NULL; 1915 struct vattr fdirfor, fdiraft, tdirfor, tdiraft; 1916 nfsrvfh_t fnsfh, tnsfh; 1917 u_quad_t frev; 1918 uid_t saved_uid; 1919 1920 #ifndef nolint 1921 fvp = (struct vnode *)0; 1922 #endif 1923 fromnd.ni_cnd.cn_nameiop = 0; 1924 tond.ni_cnd.cn_nameiop = 0; 1925 nfsm_srvmtofh(&fnsfh); 1926 nfsm_srvnamesiz(len); 1927 /* 1928 * Remember our original uid so that we can reset cr_uid before 1929 * the second nfs_namei() call, in case it is remapped. 1930 */ 1931 saved_uid = kauth_cred_geteuid(cred); 1932 fromnd.ni_cnd.cn_cred = cred; 1933 fromnd.ni_cnd.cn_nameiop = DELETE; 1934 fromnd.ni_cnd.cn_flags = LOCKPARENT; 1935 error = nfs_namei(&fromnd, &fnsfh, len, slp, nam, &md, 1936 &dpos, &fdirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 1937 if (error == 0 && fdirp && v3) { 1938 if (fromnd.ni_dvp == fromnd.ni_vp) 1939 vn_lock(fdirp, LK_SHARED | LK_RETRY); 1940 fdirfor_ret = VOP_GETATTR(fdirp, &fdirfor, cred); 1941 if (fromnd.ni_dvp == fromnd.ni_vp) 1942 VOP_UNLOCK(fdirp); 1943 } 1944 if (error) { 1945 fromnd.ni_cnd.cn_nameiop = 0; 1946 nfsm_reply(2 * NFSX_WCCDATA(v3)); 1947 nfsm_srvwcc_data(fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft); 1948 nfsm_srvwcc_data(tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft); 1949 if (fdirp) 1950 vrele(fdirp); 1951 if (fromnd.ni_pathbuf != NULL) { 1952 pathbuf_destroy(fromnd.ni_pathbuf); 1953 } 1954 return (0); 1955 } 1956 if (fromnd.ni_dvp != fromnd.ni_vp) { 1957 VOP_UNLOCK(fromnd.ni_dvp); 1958 } 1959 fvp = fromnd.ni_vp; 1960 1961 localfs = fvp->v_mount; 1962 error = VFS_RENAMELOCK_ENTER(localfs); 1963 if (error) { 1964 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 1965 vrele(fromnd.ni_dvp); 1966 vrele(fvp); 1967 goto out1; 1968 } 1969 1970 /* Copied, regrettably, from vfs_syscalls.c (q.v.) */ 1971 vrele(fvp); 1972 if ((fromnd.ni_cnd.cn_namelen == 1 && 1973 fromnd.ni_cnd.cn_nameptr[0] == '.') || 1974 (fromnd.ni_cnd.cn_namelen == 2 && 1975 fromnd.ni_cnd.cn_nameptr[0] == '.' && 1976 fromnd.ni_cnd.cn_nameptr[1] == '.')) { 1977 error = EINVAL; 1978 VFS_RENAMELOCK_EXIT(localfs); 1979 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 1980 vrele(fromnd.ni_dvp); 1981 goto out1; 1982 } 1983 vn_lock(fromnd.ni_dvp, LK_EXCLUSIVE | LK_RETRY); 1984 error = relookup(fromnd.ni_dvp, &fromnd.ni_vp, &fromnd.ni_cnd, 0); 1985 if (error) { 1986 VOP_UNLOCK(fromnd.ni_dvp); 1987 VFS_RENAMELOCK_EXIT(localfs); 1988 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 1989 vrele(fromnd.ni_dvp); 1990 goto out1; 1991 } 1992 VOP_UNLOCK(fromnd.ni_vp); 1993 if (fromnd.ni_dvp != fromnd.ni_vp) 1994 VOP_UNLOCK(fromnd.ni_dvp); 1995 fvp = fromnd.ni_vp; 1996 1997 nfsm_srvmtofh(&tnsfh); 1998 if (v3) { 1999 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 2000 len2 = fxdr_unsigned(uint32_t, *tl); 2001 /* len2 will be checked by nfs_namei */ 2002 } 2003 else { 2004 /* NFSv2 */ 2005 nfsm_strsiz(len2, NFS_MAXNAMLEN); 2006 } 2007 kauth_cred_seteuid(cred, saved_uid); 2008 tond.ni_cnd.cn_cred = cred; 2009 tond.ni_cnd.cn_nameiop = RENAME; 2010 tond.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF | NOCACHE; 2011 error = nfs_namei(&tond, &tnsfh, len2, slp, nam, &md, 2012 &dpos, &tdirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 2013 if (tdirp && v3) { 2014 tdirfor_ret = VOP_GETATTR(tdirp, &tdirfor, cred); 2015 } 2016 if (error) { 2017 VFS_RENAMELOCK_EXIT(localfs); 2018 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 2019 vrele(fromnd.ni_dvp); 2020 vrele(fvp); 2021 goto out1; 2022 } 2023 tdvp = tond.ni_dvp; 2024 tvp = tond.ni_vp; 2025 if (tvp != NULL) { 2026 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 2027 if (v3) 2028 error = EEXIST; 2029 else 2030 error = EISDIR; 2031 goto out; 2032 } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 2033 if (v3) 2034 error = EEXIST; 2035 else 2036 error = ENOTDIR; 2037 goto out; 2038 } 2039 if (tvp->v_type == VDIR && tvp->v_mountedhere) { 2040 if (v3) 2041 error = EXDEV; 2042 else 2043 error = ENOTEMPTY; 2044 goto out; 2045 } 2046 } 2047 if (fvp->v_type == VDIR && fvp->v_mountedhere) { 2048 if (v3) 2049 error = EXDEV; 2050 else 2051 error = ENOTEMPTY; 2052 goto out; 2053 } 2054 if (fvp->v_mount != tdvp->v_mount) { 2055 if (v3) 2056 error = EXDEV; 2057 else 2058 error = ENOTEMPTY; 2059 goto out; 2060 } 2061 if (fvp == tdvp) { 2062 if (v3) 2063 error = EINVAL; 2064 else 2065 error = ENOTEMPTY; 2066 } 2067 /* 2068 * If source is the same as the destination (that is the 2069 * same vnode with the same name in the same directory), 2070 * then there is nothing to do. 2071 */ 2072 if (fvp == tvp && fromnd.ni_dvp == tdvp && 2073 fromnd.ni_cnd.cn_namelen == tond.ni_cnd.cn_namelen && 2074 !memcmp(fromnd.ni_cnd.cn_nameptr, tond.ni_cnd.cn_nameptr, 2075 fromnd.ni_cnd.cn_namelen)) 2076 error = -1; 2077 out: 2078 if (!error) { 2079 nqsrv_getl(fromnd.ni_dvp, ND_WRITE); 2080 nqsrv_getl(tdvp, ND_WRITE); 2081 if (tvp) { 2082 nqsrv_getl(tvp, ND_WRITE); 2083 } 2084 error = VOP_RENAME(fromnd.ni_dvp, fromnd.ni_vp, &fromnd.ni_cnd, 2085 tond.ni_dvp, tond.ni_vp, &tond.ni_cnd); 2086 VFS_RENAMELOCK_EXIT(localfs); 2087 } else { 2088 VOP_ABORTOP(tond.ni_dvp, &tond.ni_cnd); 2089 if (tdvp == tvp) 2090 vrele(tdvp); 2091 else 2092 vput(tdvp); 2093 if (tvp) 2094 vput(tvp); 2095 VFS_RENAMELOCK_EXIT(localfs); 2096 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 2097 vrele(fromnd.ni_dvp); 2098 vrele(fvp); 2099 if (error == -1) 2100 error = 0; 2101 } 2102 if (tond.ni_pathbuf != NULL) { 2103 pathbuf_destroy(tond.ni_pathbuf); 2104 tond.ni_pathbuf = NULL; 2105 } 2106 tond.ni_cnd.cn_nameiop = 0; 2107 out1: 2108 if (fdirp) { 2109 if (v3) { 2110 vn_lock(fdirp, LK_SHARED | LK_RETRY); 2111 fdiraft_ret = VOP_GETATTR(fdirp, &fdiraft, cred); 2112 VOP_UNLOCK(fdirp); 2113 } 2114 vrele(fdirp); 2115 fdirp = NULL; 2116 } 2117 if (tdirp) { 2118 if (v3) { 2119 vn_lock(tdirp, LK_SHARED | LK_RETRY); 2120 tdiraft_ret = VOP_GETATTR(tdirp, &tdiraft, cred); 2121 VOP_UNLOCK(tdirp); 2122 } 2123 vrele(tdirp); 2124 tdirp = NULL; 2125 } 2126 pathbuf_destroy(fromnd.ni_pathbuf); 2127 fromnd.ni_pathbuf = NULL; 2128 fromnd.ni_cnd.cn_nameiop = 0; 2129 localfs = NULL; 2130 nfsm_reply(2 * NFSX_WCCDATA(v3)); 2131 if (v3) { 2132 nfsm_srvwcc_data(fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft); 2133 nfsm_srvwcc_data(tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft); 2134 } 2135 return (0); 2136 2137 nfsmout: 2138 if (fdirp) 2139 vrele(fdirp); 2140 #ifdef notdef 2141 if (tdirp) 2142 vrele(tdirp); 2143 #endif 2144 if (tond.ni_cnd.cn_nameiop) { 2145 if (tond.ni_pathbuf != NULL) { 2146 pathbuf_destroy(tond.ni_pathbuf); 2147 tond.ni_pathbuf = NULL; 2148 } 2149 } 2150 if (localfs) { 2151 VFS_RENAMELOCK_EXIT(localfs); 2152 } 2153 if (fromnd.ni_cnd.cn_nameiop) { 2154 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 2155 if (fromnd.ni_pathbuf != NULL) { 2156 pathbuf_destroy(fromnd.ni_pathbuf); 2157 fromnd.ni_pathbuf = NULL; 2158 } 2159 vrele(fromnd.ni_dvp); 2160 vrele(fvp); 2161 } 2162 return (error); 2163 } 2164 2165 /* 2166 * nfs link service 2167 */ 2168 int 2169 nfsrv_link(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 2170 { 2171 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2172 struct mbuf *nam = nfsd->nd_nam; 2173 char *dpos = nfsd->nd_dpos; 2174 kauth_cred_t cred = nfsd->nd_cr; 2175 struct nameidata nd; 2176 u_int32_t *tl; 2177 int32_t t1; 2178 char *bpos; 2179 int error = 0, rdonly, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 2180 int getret = 1, v3 = (nfsd->nd_flag & ND_NFSV3); 2181 char *cp2; 2182 struct mbuf *mb, *mreq __unused; 2183 struct vnode *vp, *xp, *dirp = (struct vnode *)0; 2184 struct vattr dirfor, diraft, at; 2185 nfsrvfh_t nsfh, dnsfh; 2186 u_quad_t frev; 2187 2188 nfsm_srvmtofh(&nsfh); 2189 nfsm_srvmtofh(&dnsfh); 2190 nfsm_srvnamesiz(len); 2191 error = nfsrv_fhtovp(&nsfh, false, &vp, cred, slp, nam, 2192 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 2193 if (error) { 2194 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2195 nfsm_srvpostop_attr(getret, &at); 2196 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2197 return (0); 2198 } 2199 if (vp->v_type == VDIR) { 2200 error = EPERM; 2201 goto out1; 2202 } 2203 nd.ni_cnd.cn_cred = cred; 2204 nd.ni_cnd.cn_nameiop = CREATE; 2205 nd.ni_cnd.cn_flags = LOCKPARENT; 2206 error = nfs_namei(&nd, &dnsfh, len, slp, nam, &md, &dpos, 2207 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 2208 if (dirp && v3) { 2209 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); 2210 } 2211 if (error) 2212 goto out1; 2213 xp = nd.ni_vp; 2214 if (xp != NULL) { 2215 error = EEXIST; 2216 goto out; 2217 } 2218 xp = nd.ni_dvp; 2219 if (vp->v_mount != xp->v_mount) 2220 error = EXDEV; 2221 out: 2222 if (!error) { 2223 nqsrv_getl(vp, ND_WRITE); 2224 nqsrv_getl(xp, ND_WRITE); 2225 error = VOP_LINK(nd.ni_dvp, vp, &nd.ni_cnd); 2226 if (nd.ni_dvp != nd.ni_vp) 2227 VOP_UNLOCK(nd.ni_dvp); 2228 vrele(nd.ni_dvp); 2229 } else { 2230 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2231 if (nd.ni_dvp == nd.ni_vp) 2232 vrele(nd.ni_dvp); 2233 else 2234 vput(nd.ni_dvp); 2235 if (nd.ni_vp) 2236 vrele(nd.ni_vp); 2237 } 2238 out1: 2239 if (v3) { 2240 vn_lock(vp, LK_SHARED | LK_RETRY); 2241 getret = VOP_GETATTR(vp, &at, cred); 2242 VOP_UNLOCK(vp); 2243 } 2244 if (dirp) { 2245 if (v3) { 2246 vn_lock(dirp, LK_SHARED | LK_RETRY); 2247 diraft_ret = VOP_GETATTR(dirp, &diraft, cred); 2248 VOP_UNLOCK(dirp); 2249 } 2250 vrele(dirp); 2251 } 2252 vrele(vp); 2253 if (nd.ni_pathbuf != NULL) { 2254 pathbuf_destroy(nd.ni_pathbuf); 2255 nd.ni_pathbuf = NULL; 2256 } 2257 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2258 if (v3) { 2259 nfsm_srvpostop_attr(getret, &at); 2260 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2261 return (0); 2262 } 2263 nfsm_srvdone; 2264 } 2265 2266 /* 2267 * nfs symbolic link service 2268 */ 2269 int 2270 nfsrv_symlink(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 2271 { 2272 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2273 struct mbuf *nam = nfsd->nd_nam; 2274 char *dpos = nfsd->nd_dpos; 2275 kauth_cred_t cred = nfsd->nd_cr; 2276 struct vattr va, dirfor, diraft; 2277 struct nameidata nd; 2278 u_int32_t *tl; 2279 int32_t t1; 2280 struct nfsv2_sattr *sp; 2281 char *bpos, *pathcp = NULL, *cp2; 2282 struct uio io; 2283 struct iovec iv; 2284 int error = 0, cache = 0, dirfor_ret = 1, diraft_ret = 1, abort = 0; 2285 uint32_t len, len2; 2286 int v3 = (nfsd->nd_flag & ND_NFSV3); 2287 struct mbuf *mb, *mreq __unused; 2288 struct vnode *dirp = (struct vnode *)0; 2289 nfsrvfh_t nsfh; 2290 u_quad_t frev; 2291 2292 nd.ni_cnd.cn_nameiop = 0; 2293 nfsm_srvmtofh(&nsfh); 2294 nfsm_srvnamesiz(len); 2295 nd.ni_cnd.cn_cred = cred; 2296 nd.ni_cnd.cn_nameiop = CREATE; 2297 nd.ni_cnd.cn_flags = LOCKPARENT; 2298 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 2299 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 2300 if (dirp && v3) { 2301 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); 2302 } 2303 if (error) 2304 goto out; 2305 abort = 1; 2306 vattr_null(&va); 2307 va.va_type = VLNK; 2308 if (v3) { 2309 va.va_mode = 0; 2310 nfsm_srvsattr(&va); 2311 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 2312 len2 = fxdr_unsigned(uint32_t, *tl); 2313 if (len2 > PATH_MAX) { 2314 /* XXX should check _PC_NO_TRUNC */ 2315 error = ENAMETOOLONG; 2316 goto abortop; 2317 } 2318 } 2319 else { 2320 /* NFSv2 */ 2321 nfsm_strsiz(len2, NFS_MAXPATHLEN); 2322 } 2323 pathcp = malloc(len2 + 1, M_TEMP, M_WAITOK); 2324 iv.iov_base = pathcp; 2325 iv.iov_len = len2; 2326 io.uio_resid = len2; 2327 io.uio_offset = 0; 2328 io.uio_iov = &iv; 2329 io.uio_iovcnt = 1; 2330 io.uio_rw = UIO_READ; 2331 UIO_SETUP_SYSSPACE(&io); 2332 nfsm_mtouio(&io, len2); 2333 if (!v3) { 2334 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2335 va.va_mode = fxdr_unsigned(u_int16_t, sp->sa_mode); 2336 } 2337 *(pathcp + len2) = '\0'; 2338 if (nd.ni_vp) { 2339 error = EEXIST; 2340 abortop: 2341 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2342 if (nd.ni_dvp == nd.ni_vp) 2343 vrele(nd.ni_dvp); 2344 else 2345 vput(nd.ni_dvp); 2346 if (nd.ni_vp) 2347 vrele(nd.ni_vp); 2348 goto out; 2349 } 2350 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2351 error = VOP_SYMLINK(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va, pathcp); 2352 if (!error) { 2353 if (v3) { 2354 vn_lock(nd.ni_vp, LK_SHARED | LK_RETRY); 2355 error = nfsrv_composefh(nd.ni_vp, &nsfh, v3); 2356 if (!error) 2357 error = VOP_GETATTR(nd.ni_vp, &va, cred); 2358 vput(nd.ni_vp); 2359 } else { 2360 vrele(nd.ni_vp); 2361 } 2362 } 2363 vput(nd.ni_dvp); 2364 out: 2365 if (pathcp) 2366 free(pathcp, M_TEMP); 2367 if (dirp) { 2368 if (v3) { 2369 vn_lock(dirp, LK_SHARED | LK_RETRY); 2370 diraft_ret = VOP_GETATTR(dirp, &diraft, cred); 2371 VOP_UNLOCK(dirp); 2372 } 2373 vrele(dirp); 2374 dirp = NULL; 2375 } 2376 if (nd.ni_pathbuf != NULL) { 2377 pathbuf_destroy(nd.ni_pathbuf); 2378 nd.ni_pathbuf = NULL; 2379 } 2380 abort = 0; 2381 nfsm_reply(NFSX_SRVFH(&nsfh, v3) + NFSX_POSTOPATTR(v3) + 2382 NFSX_WCCDATA(v3)); 2383 if (v3) { 2384 if (!error) { 2385 nfsm_srvpostop_fh(&nsfh); 2386 nfsm_srvpostop_attr(0, &va); 2387 } 2388 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2389 } 2390 return (0); 2391 nfsmout: 2392 if (abort) { 2393 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2394 if (nd.ni_dvp == nd.ni_vp) 2395 vrele(nd.ni_dvp); 2396 else 2397 vput(nd.ni_dvp); 2398 if (nd.ni_vp) 2399 vrele(nd.ni_vp); 2400 if (nd.ni_pathbuf != NULL) { 2401 pathbuf_destroy(nd.ni_pathbuf); 2402 nd.ni_pathbuf = NULL; 2403 } 2404 } 2405 if (dirp) 2406 vrele(dirp); 2407 if (pathcp) 2408 free(pathcp, M_TEMP); 2409 return (error); 2410 } 2411 2412 /* 2413 * nfs mkdir service 2414 */ 2415 int 2416 nfsrv_mkdir(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 2417 { 2418 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2419 struct mbuf *nam = nfsd->nd_nam; 2420 char *dpos = nfsd->nd_dpos; 2421 kauth_cred_t cred = nfsd->nd_cr; 2422 struct vattr va, dirfor, diraft; 2423 struct nfs_fattr *fp; 2424 struct nameidata nd; 2425 char *cp; 2426 u_int32_t *tl; 2427 int32_t t1; 2428 char *bpos; 2429 int error = 0, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 2430 int abort = 0; 2431 int v3 = (nfsd->nd_flag & ND_NFSV3); 2432 char *cp2; 2433 struct mbuf *mb, *mreq __unused; 2434 struct vnode *vp, *dirp = (struct vnode *)0; 2435 nfsrvfh_t nsfh; 2436 u_quad_t frev; 2437 2438 nfsm_srvmtofh(&nsfh); 2439 nfsm_srvnamesiz(len); 2440 nd.ni_cnd.cn_cred = cred; 2441 nd.ni_cnd.cn_nameiop = CREATE; 2442 nd.ni_cnd.cn_flags = LOCKPARENT; 2443 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 2444 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 2445 if (dirp && v3) { 2446 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); 2447 } 2448 if (error) { 2449 if (nd.ni_pathbuf != NULL) { 2450 pathbuf_destroy(nd.ni_pathbuf); 2451 nd.ni_pathbuf = NULL; 2452 } 2453 nfsm_reply(NFSX_WCCDATA(v3)); 2454 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2455 if (dirp) 2456 vrele(dirp); 2457 return (0); 2458 } 2459 abort = 1; 2460 vattr_null(&va); 2461 if (v3) { 2462 va.va_mode = 0; 2463 nfsm_srvsattr(&va); 2464 } else { 2465 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2466 va.va_mode = nfstov_mode(*tl++); 2467 } 2468 va.va_type = VDIR; 2469 vp = nd.ni_vp; 2470 if (vp != NULL) { 2471 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2472 if (nd.ni_dvp == vp) 2473 vrele(nd.ni_dvp); 2474 else 2475 vput(nd.ni_dvp); 2476 vrele(vp); 2477 error = EEXIST; 2478 goto out; 2479 } 2480 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2481 error = VOP_MKDIR(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 2482 if (!error) { 2483 vp = nd.ni_vp; 2484 vn_lock(vp, LK_SHARED | LK_RETRY); 2485 error = nfsrv_composefh(vp, &nsfh, v3); 2486 if (!error) 2487 error = VOP_GETATTR(vp, &va, cred); 2488 vput(vp); 2489 } 2490 vput(nd.ni_dvp); 2491 out: 2492 if (dirp) { 2493 if (v3) { 2494 vn_lock(dirp, LK_SHARED | LK_RETRY); 2495 diraft_ret = VOP_GETATTR(dirp, &diraft, cred); 2496 VOP_UNLOCK(dirp); 2497 } 2498 vrele(dirp); 2499 dirp = NULL; 2500 } 2501 if (nd.ni_pathbuf != NULL) { 2502 pathbuf_destroy(nd.ni_pathbuf); 2503 nd.ni_pathbuf = NULL; 2504 } 2505 abort = 0; 2506 nfsm_reply(NFSX_SRVFH(&nsfh, v3) + NFSX_POSTOPATTR(v3) + 2507 NFSX_WCCDATA(v3)); 2508 if (v3) { 2509 if (!error) { 2510 nfsm_srvpostop_fh(&nsfh); 2511 nfsm_srvpostop_attr(0, &va); 2512 } 2513 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2514 } else { 2515 nfsm_srvfhtom(&nsfh, v3); 2516 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 2517 nfsm_srvfillattr(&va, fp); 2518 } 2519 return (0); 2520 nfsmout: 2521 if (abort) { 2522 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2523 if (nd.ni_dvp == nd.ni_vp) 2524 vrele(nd.ni_dvp); 2525 else 2526 vput(nd.ni_dvp); 2527 if (nd.ni_vp) 2528 vrele(nd.ni_vp); 2529 if (nd.ni_pathbuf != NULL) { 2530 pathbuf_destroy(nd.ni_pathbuf); 2531 nd.ni_pathbuf = NULL; 2532 } 2533 } 2534 if (dirp) 2535 vrele(dirp); 2536 return (error); 2537 } 2538 2539 /* 2540 * nfs rmdir service 2541 */ 2542 int 2543 nfsrv_rmdir(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 2544 { 2545 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2546 struct mbuf *nam = nfsd->nd_nam; 2547 char *dpos = nfsd->nd_dpos; 2548 kauth_cred_t cred = nfsd->nd_cr; 2549 u_int32_t *tl; 2550 int32_t t1; 2551 char *bpos; 2552 int error = 0, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 2553 int v3 = (nfsd->nd_flag & ND_NFSV3); 2554 char *cp2; 2555 struct mbuf *mb, *mreq __unused; 2556 struct vnode *vp, *dirp = (struct vnode *)0; 2557 struct vattr dirfor, diraft; 2558 nfsrvfh_t nsfh; 2559 struct nameidata nd; 2560 u_quad_t frev; 2561 2562 nfsm_srvmtofh(&nsfh); 2563 nfsm_srvnamesiz(len); 2564 nd.ni_cnd.cn_cred = cred; 2565 nd.ni_cnd.cn_nameiop = DELETE; 2566 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 2567 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 2568 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 2569 if (dirp && v3) { 2570 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); 2571 } 2572 if (error) { 2573 if (nd.ni_pathbuf != NULL) { 2574 pathbuf_destroy(nd.ni_pathbuf); 2575 nd.ni_pathbuf = NULL; 2576 } 2577 nfsm_reply(NFSX_WCCDATA(v3)); 2578 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2579 if (dirp) 2580 vrele(dirp); 2581 return (0); 2582 } 2583 vp = nd.ni_vp; 2584 if (vp->v_type != VDIR) { 2585 error = ENOTDIR; 2586 goto out; 2587 } 2588 /* 2589 * No rmdir "." please. 2590 */ 2591 if (nd.ni_dvp == vp) { 2592 error = EINVAL; 2593 goto out; 2594 } 2595 /* 2596 * The root of a mounted filesystem cannot be deleted. 2597 */ 2598 if (vp->v_vflag & VV_ROOT) 2599 error = EBUSY; 2600 out: 2601 if (!error) { 2602 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2603 nqsrv_getl(vp, ND_WRITE); 2604 error = VOP_RMDIR(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); 2605 vput(nd.ni_dvp); 2606 } else { 2607 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2608 if (nd.ni_dvp == nd.ni_vp) 2609 vrele(nd.ni_dvp); 2610 else 2611 vput(nd.ni_dvp); 2612 vput(vp); 2613 } 2614 if (nd.ni_pathbuf != NULL) { 2615 pathbuf_destroy(nd.ni_pathbuf); 2616 nd.ni_pathbuf = NULL; 2617 } 2618 if (dirp) { 2619 if (v3) { 2620 vn_lock(dirp, LK_SHARED | LK_RETRY); 2621 diraft_ret = VOP_GETATTR(dirp, &diraft, cred); 2622 VOP_UNLOCK(dirp); 2623 } 2624 vrele(dirp); 2625 } 2626 nfsm_reply(NFSX_WCCDATA(v3)); 2627 if (v3) { 2628 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2629 return (0); 2630 } 2631 nfsm_srvdone; 2632 } 2633 2634 /* 2635 * nfs readdir service 2636 * - mallocs what it thinks is enough to read 2637 * count rounded up to a multiple of NFS_SRVDIRBLKSIZ <= NFS_MAXREADDIR 2638 * - calls VOP_READDIR() 2639 * - loops around building the reply 2640 * if the output generated exceeds count break out of loop 2641 * The nfsm_clget macro is used here so that the reply will be packed 2642 * tightly in mbuf clusters. 2643 * - it only knows that it has encountered eof when the VOP_READDIR() 2644 * reads nothing 2645 * - as such one readdir rpc will return eof false although you are there 2646 * and then the next will return eof 2647 * - it trims out records with d_fileno == 0 2648 * this doesn't matter for Unix clients, but they might confuse clients 2649 * for other os'. 2650 * - it trims out records with d_type == DT_WHT 2651 * these cannot be seen through NFS (unless we extend the protocol) 2652 * NB: It is tempting to set eof to true if the VOP_READDIR() reads less 2653 * than requested, but this may not apply to all filesystems. For 2654 * example, client NFS does not { although it is never remote mounted 2655 * anyhow } 2656 * The alternate call nfsrv_readdirplus() does lookups as well. 2657 * PS: The NFS protocol spec. does not clarify what the "count" byte 2658 * argument is a count of.. just name strings and file id's or the 2659 * entire reply rpc or ... 2660 * I tried just file name and id sizes and it confused the Sun client, 2661 * so I am using the full rpc size now. The "paranoia.." comment refers 2662 * to including the status longwords that are not a part of the dir. 2663 * "entry" structures, but are in the rpc. 2664 */ 2665 2666 #define NFS_SRVDIRBLKSIZ 1024 2667 2668 struct flrep { 2669 nfsuint64 fl_off; 2670 u_int32_t fl_postopok; 2671 struct nfs_fattr fl_fattr; /* XXX: must be of fattr3 size */ 2672 u_int32_t fl_fhok; 2673 u_int32_t fl_fhsize; 2674 /* handle comes here, filled in dynamically */ 2675 }; 2676 2677 int 2678 nfsrv_readdir(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 2679 { 2680 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2681 struct mbuf *nam = nfsd->nd_nam; 2682 char *dpos = nfsd->nd_dpos; 2683 kauth_cred_t cred = nfsd->nd_cr; 2684 char *bp, *be; 2685 struct mbuf *mp; 2686 struct dirent *dp; 2687 char *cp; 2688 u_int32_t *tl; 2689 int32_t t1; 2690 char *bpos; 2691 struct mbuf *mb, *mreq __unused, *mp2; 2692 char *cpos, *cend, *cp2, *rbuf; 2693 struct vnode *vp; 2694 struct vattr at; 2695 nfsrvfh_t nsfh; 2696 struct uio io; 2697 struct iovec iv; 2698 int len, nlen, rem, xfer, tsiz, i, error = 0, getret = 1; 2699 int siz, cnt, fullsiz, eofflag, rdonly, cache = 0, ncookies; 2700 int v3 = (nfsd->nd_flag & ND_NFSV3); 2701 u_quad_t frev, off, toff; 2702 #ifdef NFS3_STRICTVERF 2703 u_quad_t verf; 2704 #endif 2705 off_t *cookies = NULL, *cookiep; 2706 nfsuint64 jar; 2707 2708 nfsm_srvmtofh(&nsfh); 2709 if (v3) { 2710 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 2711 toff = fxdr_hyper(tl); 2712 tl += 2; 2713 #ifdef NFS3_STRICTVERF 2714 verf = fxdr_hyper(tl); 2715 #endif 2716 tl += 2; 2717 } else { 2718 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2719 toff = fxdr_unsigned(u_quad_t, *tl++); 2720 } 2721 off = toff; 2722 cnt = fxdr_unsigned(int, *tl); 2723 siz = ((cnt + NFS_SRVDIRBLKSIZ - 1) & ~(NFS_SRVDIRBLKSIZ - 1)); 2724 xfer = NFS_SRVMAXDATA(nfsd); 2725 if (siz > xfer) 2726 siz = xfer; 2727 fullsiz = siz; 2728 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 2729 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 2730 if (!error && vp->v_type != VDIR) { 2731 error = ENOTDIR; 2732 vput(vp); 2733 } 2734 if (error) { 2735 nfsm_reply(NFSX_UNSIGNED); 2736 nfsm_srvpostop_attr(getret, &at); 2737 return (0); 2738 } 2739 nqsrv_getl(vp, ND_READ); 2740 if (v3) { 2741 error = getret = VOP_GETATTR(vp, &at, cred); 2742 #ifdef NFS3_STRICTVERF 2743 /* 2744 * XXX This check is too strict for Solaris 2.5 clients. 2745 */ 2746 if (!error && toff && verf != at.va_filerev) 2747 error = NFSERR_BAD_COOKIE; 2748 #endif 2749 } 2750 if (!error) 2751 error = nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 0); 2752 if (error) { 2753 vput(vp); 2754 nfsm_reply(NFSX_POSTOPATTR(v3)); 2755 nfsm_srvpostop_attr(getret, &at); 2756 return (0); 2757 } 2758 VOP_UNLOCK(vp); 2759 rbuf = malloc(siz, M_TEMP, M_WAITOK); 2760 again: 2761 iv.iov_base = rbuf; 2762 iv.iov_len = fullsiz; 2763 io.uio_iov = &iv; 2764 io.uio_iovcnt = 1; 2765 io.uio_offset = (off_t)off; 2766 io.uio_resid = fullsiz; 2767 io.uio_rw = UIO_READ; 2768 UIO_SETUP_SYSSPACE(&io); 2769 eofflag = 0; 2770 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2771 2772 error = VOP_READDIR(vp, &io, cred, &eofflag, &cookies, &ncookies); 2773 2774 off = (off_t)io.uio_offset; 2775 if (!cookies && !error) 2776 error = NFSERR_PERM; 2777 if (v3) { 2778 getret = VOP_GETATTR(vp, &at, cred); 2779 if (!error) 2780 error = getret; 2781 } 2782 2783 VOP_UNLOCK(vp); 2784 if (error) { 2785 vrele(vp); 2786 free((void *)rbuf, M_TEMP); 2787 if (cookies) 2788 free((void *)cookies, M_TEMP); 2789 nfsm_reply(NFSX_POSTOPATTR(v3)); 2790 nfsm_srvpostop_attr(getret, &at); 2791 return (0); 2792 } 2793 if (io.uio_resid) { 2794 siz -= io.uio_resid; 2795 2796 /* 2797 * If nothing read, return eof 2798 * rpc reply 2799 */ 2800 if (siz == 0) { 2801 vrele(vp); 2802 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_COOKIEVERF(v3) + 2803 2 * NFSX_UNSIGNED); 2804 if (v3) { 2805 nfsm_srvpostop_attr(getret, &at); 2806 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 2807 txdr_hyper(at.va_filerev, tl); 2808 tl += 2; 2809 } else 2810 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2811 *tl++ = nfs_false; 2812 *tl = nfs_true; 2813 free((void *)rbuf, M_TEMP); 2814 free((void *)cookies, M_TEMP); 2815 return (0); 2816 } 2817 } 2818 2819 /* 2820 * Check for degenerate cases of nothing useful read. 2821 * If so go try again 2822 */ 2823 cpos = rbuf; 2824 cend = rbuf + siz; 2825 dp = (struct dirent *)cpos; 2826 cookiep = cookies; 2827 2828 while (cpos < cend && ncookies > 0 && 2829 (dp->d_fileno == 0 || dp->d_type == DT_WHT)) { 2830 cpos += dp->d_reclen; 2831 dp = (struct dirent *)cpos; 2832 cookiep++; 2833 ncookies--; 2834 } 2835 if (cpos >= cend || ncookies == 0) { 2836 toff = off; 2837 siz = fullsiz; 2838 free(cookies, M_TEMP); 2839 cookies = NULL; 2840 goto again; 2841 } 2842 2843 len = 3 * NFSX_UNSIGNED; /* paranoia, probably can be 0 */ 2844 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_COOKIEVERF(v3) + siz); 2845 if (v3) { 2846 nfsm_srvpostop_attr(getret, &at); 2847 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2848 txdr_hyper(at.va_filerev, tl); 2849 } 2850 mp = mp2 = mb; 2851 bp = bpos; 2852 be = bp + M_TRAILINGSPACE(mp); 2853 2854 /* Loop through the records and build reply */ 2855 while (cpos < cend && ncookies > 0) { 2856 if (dp->d_fileno != 0 && dp->d_type != DT_WHT) { 2857 nlen = dp->d_namlen; 2858 rem = nfsm_rndup(nlen)-nlen; 2859 len += (4 * NFSX_UNSIGNED + nlen + rem); 2860 if (v3) 2861 len += 2 * NFSX_UNSIGNED; 2862 if (len > cnt) { 2863 eofflag = 0; 2864 break; 2865 } 2866 /* 2867 * Build the directory record xdr from 2868 * the dirent entry. 2869 */ 2870 nfsm_clget; 2871 *tl = nfs_true; 2872 bp += NFSX_UNSIGNED; 2873 if (v3) { 2874 nfsm_clget; 2875 *tl = txdr_unsigned(dp->d_fileno >> 32); 2876 bp += NFSX_UNSIGNED; 2877 } 2878 nfsm_clget; 2879 *tl = txdr_unsigned(dp->d_fileno); 2880 bp += NFSX_UNSIGNED; 2881 nfsm_clget; 2882 *tl = txdr_unsigned(nlen); 2883 bp += NFSX_UNSIGNED; 2884 2885 /* And loop around copying the name */ 2886 xfer = nlen; 2887 cp = dp->d_name; 2888 while (xfer > 0) { 2889 nfsm_clget; 2890 if ((bp+xfer) > be) 2891 tsiz = be-bp; 2892 else 2893 tsiz = xfer; 2894 memcpy(bp, cp, tsiz); 2895 bp += tsiz; 2896 xfer -= tsiz; 2897 if (xfer > 0) 2898 cp += tsiz; 2899 } 2900 /* And null pad to an int32_t boundary */ 2901 for (i = 0; i < rem; i++) 2902 *bp++ = '\0'; 2903 nfsm_clget; 2904 2905 /* Finish off the record */ 2906 txdr_hyper(*cookiep, &jar); 2907 if (v3) { 2908 *tl = jar.nfsuquad[0]; 2909 bp += NFSX_UNSIGNED; 2910 nfsm_clget; 2911 } 2912 *tl = jar.nfsuquad[1]; 2913 bp += NFSX_UNSIGNED; 2914 } 2915 cpos += dp->d_reclen; 2916 dp = (struct dirent *)cpos; 2917 cookiep++; 2918 ncookies--; 2919 } 2920 vrele(vp); 2921 nfsm_clget; 2922 *tl = nfs_false; 2923 bp += NFSX_UNSIGNED; 2924 nfsm_clget; 2925 if (eofflag) 2926 *tl = nfs_true; 2927 else 2928 *tl = nfs_false; 2929 bp += NFSX_UNSIGNED; 2930 if (mp != mb) { 2931 if (bp < be) 2932 mp->m_len = bp - mtod(mp, char *); 2933 } else 2934 mp->m_len += bp - bpos; 2935 free((void *)rbuf, M_TEMP); 2936 free((void *)cookies, M_TEMP); 2937 nfsm_srvdone; 2938 } 2939 2940 int 2941 nfsrv_readdirplus(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 2942 { 2943 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2944 struct mbuf *nam = nfsd->nd_nam; 2945 char *dpos = nfsd->nd_dpos; 2946 kauth_cred_t cred = nfsd->nd_cr; 2947 char *bp, *be; 2948 struct mbuf *mp; 2949 struct dirent *dp; 2950 char *cp; 2951 u_int32_t *tl; 2952 int32_t t1; 2953 char *bpos; 2954 struct mbuf *mb, *mreq __unused, *mp2; 2955 char *cpos, *cend, *cp2, *rbuf; 2956 struct vnode *vp, *nvp; 2957 struct flrep fl; 2958 nfsrvfh_t nsfh; 2959 struct uio io; 2960 struct iovec iv; 2961 struct vattr va, at, *vap = &va; 2962 struct nfs_fattr *fp; 2963 int len, nlen, rem, xfer, tsiz, i, error = 0, getret = 1; 2964 int siz, cnt, fullsiz, eofflag, rdonly, cache = 0, dirlen, ncookies; 2965 u_quad_t frev, off, toff; 2966 #ifdef NFS3_STRICTVERF 2967 u_quad_t verf; 2968 #endif 2969 off_t *cookies = NULL, *cookiep; 2970 2971 nfsm_srvmtofh(&nsfh); 2972 nfsm_dissect(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 2973 toff = fxdr_hyper(tl); 2974 tl += 2; 2975 #ifdef NFS3_STRICTVERF 2976 verf = fxdr_hyper(tl); 2977 #endif 2978 tl += 2; 2979 siz = fxdr_unsigned(int, *tl++); 2980 cnt = fxdr_unsigned(int, *tl); 2981 off = toff; 2982 siz = ((siz + NFS_SRVDIRBLKSIZ - 1) & ~(NFS_SRVDIRBLKSIZ - 1)); 2983 xfer = NFS_SRVMAXDATA(nfsd); 2984 if (siz > xfer) 2985 siz = xfer; 2986 fullsiz = siz; 2987 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 2988 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 2989 if (!error && vp->v_type != VDIR) { 2990 error = ENOTDIR; 2991 vput(vp); 2992 } 2993 if (error) { 2994 nfsm_reply(NFSX_UNSIGNED); 2995 nfsm_srvpostop_attr(getret, &at); 2996 return (0); 2997 } 2998 error = getret = VOP_GETATTR(vp, &at, cred); 2999 #ifdef NFS3_STRICTVERF 3000 /* 3001 * XXX This check is too strict for Solaris 2.5 clients. 3002 */ 3003 if (!error && toff && verf != at.va_filerev) 3004 error = NFSERR_BAD_COOKIE; 3005 #endif 3006 if (!error) { 3007 nqsrv_getl(vp, ND_READ); 3008 error = nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 0); 3009 } 3010 if (error) { 3011 vput(vp); 3012 nfsm_reply(NFSX_V3POSTOPATTR); 3013 nfsm_srvpostop_attr(getret, &at); 3014 return (0); 3015 } 3016 VOP_UNLOCK(vp); 3017 3018 rbuf = malloc(siz, M_TEMP, M_WAITOK); 3019 again: 3020 iv.iov_base = rbuf; 3021 iv.iov_len = fullsiz; 3022 io.uio_iov = &iv; 3023 io.uio_iovcnt = 1; 3024 io.uio_offset = (off_t)off; 3025 io.uio_resid = fullsiz; 3026 io.uio_rw = UIO_READ; 3027 UIO_SETUP_SYSSPACE(&io); 3028 eofflag = 0; 3029 3030 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 3031 3032 error = VOP_READDIR(vp, &io, cred, &eofflag, &cookies, &ncookies); 3033 3034 off = (u_quad_t)io.uio_offset; 3035 getret = VOP_GETATTR(vp, &at, cred); 3036 3037 VOP_UNLOCK(vp); 3038 3039 /* 3040 * If the VGET operation doesn't work for this filesystem, 3041 * we can't support readdirplus. Returning NOTSUPP should 3042 * make clients fall back to plain readdir. 3043 * There's no need to check for VPTOFH as well, we wouldn't 3044 * even be here otherwise. 3045 */ 3046 if (!getret) { 3047 if ((getret = VFS_VGET(vp->v_mount, at.va_fileid, &nvp))) 3048 getret = (getret == EOPNOTSUPP) ? 3049 NFSERR_NOTSUPP : NFSERR_IO; 3050 else 3051 vput(nvp); 3052 } 3053 3054 if (!cookies && !error) 3055 error = NFSERR_PERM; 3056 if (!error) 3057 error = getret; 3058 if (error) { 3059 vrele(vp); 3060 if (cookies) 3061 free((void *)cookies, M_TEMP); 3062 free((void *)rbuf, M_TEMP); 3063 nfsm_reply(NFSX_V3POSTOPATTR); 3064 nfsm_srvpostop_attr(getret, &at); 3065 return (0); 3066 } 3067 if (io.uio_resid) { 3068 siz -= io.uio_resid; 3069 3070 /* 3071 * If nothing read, return eof 3072 * rpc reply 3073 */ 3074 if (siz == 0) { 3075 vrele(vp); 3076 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF + 3077 2 * NFSX_UNSIGNED); 3078 nfsm_srvpostop_attr(getret, &at); 3079 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 3080 txdr_hyper(at.va_filerev, tl); 3081 tl += 2; 3082 *tl++ = nfs_false; 3083 *tl = nfs_true; 3084 free((void *)cookies, M_TEMP); 3085 free((void *)rbuf, M_TEMP); 3086 return (0); 3087 } 3088 } 3089 3090 /* 3091 * Check for degenerate cases of nothing useful read. 3092 * If so go try again 3093 */ 3094 cpos = rbuf; 3095 cend = rbuf + siz; 3096 dp = (struct dirent *)cpos; 3097 cookiep = cookies; 3098 3099 while (cpos < cend && ncookies > 0 && 3100 (dp->d_fileno == 0 || dp->d_type == DT_WHT)) { 3101 cpos += dp->d_reclen; 3102 dp = (struct dirent *)cpos; 3103 cookiep++; 3104 ncookies--; 3105 } 3106 if (cpos >= cend || ncookies == 0) { 3107 toff = off; 3108 siz = fullsiz; 3109 free(cookies, M_TEMP); 3110 cookies = NULL; 3111 goto again; 3112 } 3113 3114 dirlen = len = NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF + 2 * NFSX_UNSIGNED; 3115 nfsm_reply(cnt); 3116 nfsm_srvpostop_attr(getret, &at); 3117 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 3118 txdr_hyper(at.va_filerev, tl); 3119 mp = mp2 = mb; 3120 bp = bpos; 3121 be = bp + M_TRAILINGSPACE(mp); 3122 3123 /* Loop through the records and build reply */ 3124 while (cpos < cend && ncookies > 0) { 3125 if (dp->d_fileno != 0 && dp->d_type != DT_WHT) { 3126 nfsrvfh_t nnsfh; 3127 3128 nlen = dp->d_namlen; 3129 rem = nfsm_rndup(nlen)-nlen; 3130 3131 /* 3132 * For readdir_and_lookup get the vnode using 3133 * the file number. 3134 */ 3135 if (VFS_VGET(vp->v_mount, dp->d_fileno, &nvp)) 3136 goto invalid; 3137 if (nfsrv_composefh(nvp, &nnsfh, true)) { 3138 vput(nvp); 3139 goto invalid; 3140 } 3141 if (VOP_GETATTR(nvp, vap, cred)) { 3142 vput(nvp); 3143 goto invalid; 3144 } 3145 vput(nvp); 3146 3147 /* 3148 * If either the dircount or maxcount will be 3149 * exceeded, get out now. Both of these lengths 3150 * are calculated conservatively, including all 3151 * XDR overheads. 3152 */ 3153 len += (8 * NFSX_UNSIGNED + nlen + rem + NFSX_V3FH + 3154 NFSX_V3POSTOPATTR); 3155 dirlen += (6 * NFSX_UNSIGNED + nlen + rem); 3156 if (len > cnt || dirlen > fullsiz) { 3157 eofflag = 0; 3158 break; 3159 } 3160 3161 /* 3162 * Build the directory record xdr from 3163 * the dirent entry. 3164 */ 3165 fp = (struct nfs_fattr *)&fl.fl_fattr; 3166 nfsm_srvfillattr(vap, fp); 3167 fl.fl_fhsize = txdr_unsigned(NFSX_V3FH); 3168 fl.fl_fhok = nfs_true; 3169 fl.fl_postopok = nfs_true; 3170 txdr_hyper(*cookiep, fl.fl_off.nfsuquad); 3171 3172 nfsm_clget; 3173 *tl = nfs_true; 3174 bp += NFSX_UNSIGNED; 3175 nfsm_clget; 3176 *tl = txdr_unsigned(dp->d_fileno >> 32); 3177 bp += NFSX_UNSIGNED; 3178 nfsm_clget; 3179 *tl = txdr_unsigned(dp->d_fileno); 3180 bp += NFSX_UNSIGNED; 3181 nfsm_clget; 3182 *tl = txdr_unsigned(nlen); 3183 bp += NFSX_UNSIGNED; 3184 3185 /* And loop around copying the name */ 3186 xfer = nlen; 3187 cp = dp->d_name; 3188 while (xfer > 0) { 3189 nfsm_clget; 3190 if ((bp + xfer) > be) 3191 tsiz = be - bp; 3192 else 3193 tsiz = xfer; 3194 memcpy(bp, cp, tsiz); 3195 bp += tsiz; 3196 xfer -= tsiz; 3197 if (xfer > 0) 3198 cp += tsiz; 3199 } 3200 /* And null pad to an int32_t boundary */ 3201 for (i = 0; i < rem; i++) 3202 *bp++ = '\0'; 3203 3204 /* 3205 * Now copy the flrep structure out. 3206 */ 3207 xfer = sizeof(struct flrep); 3208 cp = (void *)&fl; 3209 while (xfer > 0) { 3210 nfsm_clget; 3211 if ((bp + xfer) > be) 3212 tsiz = be - bp; 3213 else 3214 tsiz = xfer; 3215 memcpy(bp, cp, tsiz); 3216 bp += tsiz; 3217 xfer -= tsiz; 3218 if (xfer > 0) 3219 cp += tsiz; 3220 } 3221 3222 /* 3223 * ... and filehandle. 3224 */ 3225 xfer = NFSRVFH_SIZE(&nnsfh); 3226 cp = NFSRVFH_DATA(&nnsfh); 3227 while (xfer > 0) { 3228 nfsm_clget; 3229 if ((bp + xfer) > be) 3230 tsiz = be - bp; 3231 else 3232 tsiz = xfer; 3233 memcpy(bp, cp, tsiz); 3234 bp += tsiz; 3235 xfer -= tsiz; 3236 if (xfer > 0) 3237 cp += tsiz; 3238 } 3239 } 3240 invalid: 3241 cpos += dp->d_reclen; 3242 dp = (struct dirent *)cpos; 3243 cookiep++; 3244 ncookies--; 3245 } 3246 vrele(vp); 3247 nfsm_clget; 3248 *tl = nfs_false; 3249 bp += NFSX_UNSIGNED; 3250 nfsm_clget; 3251 if (eofflag) 3252 *tl = nfs_true; 3253 else 3254 *tl = nfs_false; 3255 bp += NFSX_UNSIGNED; 3256 if (mp != mb) { 3257 if (bp < be) 3258 mp->m_len = bp - mtod(mp, char *); 3259 } else 3260 mp->m_len += bp - bpos; 3261 free((void *)cookies, M_TEMP); 3262 free((void *)rbuf, M_TEMP); 3263 nfsm_srvdone; 3264 } 3265 3266 /* 3267 * nfs commit service 3268 */ 3269 int 3270 nfsrv_commit(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 3271 { 3272 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3273 struct mbuf *nam = nfsd->nd_nam; 3274 char *dpos = nfsd->nd_dpos; 3275 kauth_cred_t cred = nfsd->nd_cr; 3276 struct vattr bfor, aft; 3277 struct vnode *vp; 3278 nfsrvfh_t nsfh; 3279 u_int32_t *tl; 3280 int32_t t1; 3281 char *bpos; 3282 int error = 0, rdonly, for_ret = 1, aft_ret = 1, cache = 0; 3283 uint32_t cnt; 3284 char *cp2; 3285 struct mbuf *mb, *mreq __unused; 3286 u_quad_t frev, off, end; 3287 3288 nfsm_srvmtofh(&nsfh); 3289 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 3290 3291 off = fxdr_hyper(tl); 3292 tl += 2; 3293 cnt = fxdr_unsigned(uint32_t, *tl); 3294 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 3295 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 3296 if (error) { 3297 nfsm_reply(2 * NFSX_UNSIGNED); 3298 nfsm_srvwcc_data(for_ret, &bfor, aft_ret, &aft); 3299 return (0); 3300 } 3301 for_ret = VOP_GETATTR(vp, &bfor, cred); 3302 end = (cnt > 0) ? off + cnt : vp->v_size; 3303 if (end < off || end > vp->v_size) 3304 end = vp->v_size; 3305 if (off < vp->v_size) 3306 error = VOP_FSYNC(vp, cred, FSYNC_WAIT, off, end); 3307 /* else error == 0, from nfsrv_fhtovp() */ 3308 aft_ret = VOP_GETATTR(vp, &aft, cred); 3309 vput(vp); 3310 nfsm_reply(NFSX_V3WCCDATA + NFSX_V3WRITEVERF); 3311 nfsm_srvwcc_data(for_ret, &bfor, aft_ret, &aft); 3312 if (!error) { 3313 nfsm_build(tl, u_int32_t *, NFSX_V3WRITEVERF); 3314 *tl++ = txdr_unsigned(boottime.tv_sec); 3315 *tl = txdr_unsigned(boottime.tv_nsec / 1000); 3316 } else { 3317 return (0); 3318 } 3319 nfsm_srvdone; 3320 } 3321 3322 /* 3323 * nfs statfs service 3324 */ 3325 int 3326 nfsrv_statfs(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 3327 { 3328 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3329 struct mbuf *nam = nfsd->nd_nam; 3330 char *dpos = nfsd->nd_dpos; 3331 kauth_cred_t cred = nfsd->nd_cr; 3332 struct statvfs *sf = NULL; 3333 struct nfs_statfs *sfp; 3334 u_int32_t *tl; 3335 int32_t t1; 3336 char *bpos; 3337 int error = 0, rdonly, cache = 0, getret = 1; 3338 int v3 = (nfsd->nd_flag & ND_NFSV3); 3339 char *cp2; 3340 struct mbuf *mb, *mreq __unused; 3341 struct vnode *vp; 3342 struct vattr at; 3343 nfsrvfh_t nsfh; 3344 u_quad_t frev, tval; 3345 3346 nfsm_srvmtofh(&nsfh); 3347 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 3348 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 3349 if (error) { 3350 nfsm_reply(NFSX_UNSIGNED); 3351 nfsm_srvpostop_attr(getret, &at); 3352 return (0); 3353 } 3354 sf = malloc(sizeof(*sf), M_TEMP, M_WAITOK); 3355 error = VFS_STATVFS(vp->v_mount, sf); 3356 getret = VOP_GETATTR(vp, &at, cred); 3357 vput(vp); 3358 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_STATFS(v3)); 3359 if (v3) 3360 nfsm_srvpostop_attr(getret, &at); 3361 if (error) { 3362 free(sf, M_TEMP); 3363 return (0); 3364 } 3365 nfsm_build(sfp, struct nfs_statfs *, NFSX_STATFS(v3)); 3366 if (v3) { 3367 tval = (u_quad_t)((quad_t)sf->f_blocks * (quad_t)sf->f_frsize); 3368 txdr_hyper(tval, &sfp->sf_tbytes); 3369 tval = (u_quad_t)((quad_t)sf->f_bfree * (quad_t)sf->f_frsize); 3370 txdr_hyper(tval, &sfp->sf_fbytes); 3371 tval = (u_quad_t)((quad_t)sf->f_bavail * (quad_t)sf->f_frsize); 3372 txdr_hyper(tval, &sfp->sf_abytes); 3373 tval = (u_quad_t)sf->f_files; 3374 txdr_hyper(tval, &sfp->sf_tfiles); 3375 tval = (u_quad_t)sf->f_ffree; 3376 txdr_hyper(tval, &sfp->sf_ffiles); 3377 txdr_hyper(tval, &sfp->sf_afiles); 3378 sfp->sf_invarsec = 0; 3379 } else { 3380 sfp->sf_tsize = txdr_unsigned(NFS_MAXDGRAMDATA); 3381 sfp->sf_bsize = txdr_unsigned(sf->f_frsize); 3382 sfp->sf_blocks = txdr_unsigned(sf->f_blocks); 3383 sfp->sf_bfree = txdr_unsigned(sf->f_bfree); 3384 sfp->sf_bavail = txdr_unsigned(sf->f_bavail); 3385 } 3386 nfsmout: 3387 if (sf) 3388 free(sf, M_TEMP); 3389 return error; 3390 } 3391 3392 /* 3393 * nfs fsinfo service 3394 */ 3395 int 3396 nfsrv_fsinfo(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 3397 { 3398 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3399 struct mbuf *nam = nfsd->nd_nam; 3400 char *dpos = nfsd->nd_dpos; 3401 kauth_cred_t cred = nfsd->nd_cr; 3402 u_int32_t *tl; 3403 struct nfsv3_fsinfo *sip; 3404 int32_t t1; 3405 char *bpos; 3406 int error = 0, rdonly, cache = 0, getret = 1; 3407 uint32_t maxdata; 3408 char *cp2; 3409 struct mbuf *mb, *mreq __unused; 3410 struct vnode *vp; 3411 struct vattr at; 3412 nfsrvfh_t nsfh; 3413 u_quad_t frev, maxfsize; 3414 struct statvfs *sb; 3415 3416 nfsm_srvmtofh(&nsfh); 3417 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 3418 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 3419 if (error) { 3420 nfsm_reply(NFSX_UNSIGNED); 3421 nfsm_srvpostop_attr(getret, &at); 3422 return (0); 3423 } 3424 3425 /* XXX Try to make a guess on the max file size. */ 3426 sb = malloc(sizeof(*sb), M_TEMP, M_WAITOK); 3427 VFS_STATVFS(vp->v_mount, sb); 3428 maxfsize = (u_quad_t)0x80000000 * sb->f_frsize - 1; 3429 free(sb, M_TEMP); 3430 3431 getret = VOP_GETATTR(vp, &at, cred); 3432 vput(vp); 3433 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3FSINFO); 3434 nfsm_srvpostop_attr(getret, &at); 3435 nfsm_build(sip, struct nfsv3_fsinfo *, NFSX_V3FSINFO); 3436 3437 /* 3438 * XXX 3439 * There should be file system VFS OP(s) to get this information. 3440 * For now, assume ufs. 3441 */ 3442 if (slp->ns_so->so_type == SOCK_DGRAM) 3443 maxdata = NFS_MAXDGRAMDATA; 3444 else 3445 maxdata = NFS_MAXDATA; 3446 sip->fs_rtmax = txdr_unsigned(maxdata); 3447 sip->fs_rtpref = txdr_unsigned(maxdata); 3448 sip->fs_rtmult = txdr_unsigned(NFS_FABLKSIZE); 3449 sip->fs_wtmax = txdr_unsigned(maxdata); 3450 sip->fs_wtpref = txdr_unsigned(maxdata); 3451 sip->fs_wtmult = txdr_unsigned(NFS_FABLKSIZE); 3452 sip->fs_dtpref = txdr_unsigned(maxdata); 3453 txdr_hyper(maxfsize, &sip->fs_maxfilesize); 3454 sip->fs_timedelta.nfsv3_sec = 0; 3455 sip->fs_timedelta.nfsv3_nsec = txdr_unsigned(1); 3456 sip->fs_properties = txdr_unsigned(NFSV3FSINFO_LINK | 3457 NFSV3FSINFO_SYMLINK | NFSV3FSINFO_HOMOGENEOUS | 3458 NFSV3FSINFO_CANSETTIME); 3459 nfsm_srvdone; 3460 } 3461 3462 /* 3463 * nfs pathconf service 3464 */ 3465 int 3466 nfsrv_pathconf(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 3467 { 3468 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3469 struct mbuf *nam = nfsd->nd_nam; 3470 char *dpos = nfsd->nd_dpos; 3471 kauth_cred_t cred = nfsd->nd_cr; 3472 u_int32_t *tl; 3473 struct nfsv3_pathconf *pc; 3474 int32_t t1; 3475 char *bpos; 3476 int error = 0, rdonly, cache = 0, getret = 1; 3477 register_t linkmax, namemax, chownres, notrunc; 3478 char *cp2; 3479 struct mbuf *mb, *mreq __unused; 3480 struct vnode *vp; 3481 struct vattr at; 3482 nfsrvfh_t nsfh; 3483 u_quad_t frev; 3484 3485 nfsm_srvmtofh(&nsfh); 3486 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 3487 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 3488 if (error) { 3489 nfsm_reply(NFSX_UNSIGNED); 3490 nfsm_srvpostop_attr(getret, &at); 3491 return (0); 3492 } 3493 error = VOP_PATHCONF(vp, _PC_LINK_MAX, &linkmax); 3494 if (!error) 3495 error = VOP_PATHCONF(vp, _PC_NAME_MAX, &namemax); 3496 if (!error) 3497 error = VOP_PATHCONF(vp, _PC_CHOWN_RESTRICTED, &chownres); 3498 if (!error) 3499 error = VOP_PATHCONF(vp, _PC_NO_TRUNC, ¬runc); 3500 getret = VOP_GETATTR(vp, &at, cred); 3501 vput(vp); 3502 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3PATHCONF); 3503 nfsm_srvpostop_attr(getret, &at); 3504 if (error) 3505 return (0); 3506 nfsm_build(pc, struct nfsv3_pathconf *, NFSX_V3PATHCONF); 3507 3508 pc->pc_linkmax = txdr_unsigned(linkmax); 3509 pc->pc_namemax = txdr_unsigned(namemax); 3510 pc->pc_notrunc = txdr_unsigned(notrunc); 3511 pc->pc_chownrestricted = txdr_unsigned(chownres); 3512 3513 /* 3514 * These should probably be supported by VOP_PATHCONF(), but 3515 * until msdosfs is exportable (why would you want to?), the 3516 * Unix defaults should be ok. 3517 */ 3518 pc->pc_caseinsensitive = nfs_false; 3519 pc->pc_casepreserving = nfs_true; 3520 nfsm_srvdone; 3521 } 3522 3523 /* 3524 * Null operation, used by clients to ping server 3525 */ 3526 /* ARGSUSED */ 3527 int 3528 nfsrv_null(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, 3529 struct lwp *lwp, struct mbuf **mrq) 3530 { 3531 struct mbuf *mrep = nfsd->nd_mrep; 3532 char *bpos; 3533 int error = NFSERR_RETVOID, cache = 0; 3534 struct mbuf *mb, *mreq __unused; 3535 u_quad_t frev; 3536 3537 nfsm_reply(0); 3538 nfsmout: 3539 return (0); 3540 } 3541 3542 /* 3543 * No operation, used for obsolete procedures 3544 */ 3545 /* ARGSUSED */ 3546 int 3547 nfsrv_noop(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, 3548 struct lwp *lwp, struct mbuf **mrq) 3549 { 3550 struct mbuf *mrep = nfsd->nd_mrep; 3551 char *bpos; 3552 int error, cache = 0; 3553 struct mbuf *mb, *mreq __unused; 3554 u_quad_t frev; 3555 3556 if (nfsd->nd_repstat) 3557 error = nfsd->nd_repstat; 3558 else 3559 error = EPROCUNAVAIL; 3560 nfsm_reply(0); 3561 nfsmout: 3562 return (0); 3563 } 3564 3565 /* 3566 * Perform access checking for vnodes obtained from file handles that would 3567 * refer to files already opened by a Unix client. You cannot just use 3568 * vn_writechk() and VOP_ACCESS() for two reasons. 3569 * 1 - You must check for exported rdonly as well as MNT_RDONLY for the write case 3570 * 2 - The owner is to be given access irrespective of mode bits for some 3571 * operations, so that processes that chmod after opening a file don't 3572 * break. I don't like this because it opens a security hole, but since 3573 * the nfs server opens a security hole the size of a barn door anyhow, 3574 * what the heck. 3575 * 3576 * The exception to rule 2 is EPERM. If a file is IMMUTABLE, VOP_ACCESS() 3577 * will return EPERM instead of EACCES. EPERM is always an error. 3578 */ 3579 int 3580 nfsrv_access(struct vnode *vp, int flags, kauth_cred_t cred, int rdonly, struct lwp *lwp, int override) 3581 { 3582 struct vattr vattr; 3583 int error; 3584 if (flags & VWRITE) { 3585 /* Just vn_writechk() changed to check rdonly */ 3586 /* 3587 * Disallow write attempts on read-only file systems; 3588 * unless the file is a socket or a block or character 3589 * device resident on the file system. 3590 */ 3591 if (rdonly || (vp->v_mount->mnt_flag & MNT_RDONLY)) { 3592 switch (vp->v_type) { 3593 case VREG: 3594 case VDIR: 3595 case VLNK: 3596 return (EROFS); 3597 default: 3598 break; 3599 } 3600 } 3601 3602 /* 3603 * If the vnode is in use as a process's text, 3604 * we can't allow writing. 3605 */ 3606 if (vp->v_iflag & VI_TEXT) 3607 return (ETXTBSY); 3608 } 3609 error = VOP_GETATTR(vp, &vattr, cred); 3610 if (error) 3611 return (error); 3612 error = VOP_ACCESS(vp, flags, cred); 3613 /* 3614 * Allow certain operations for the owner (reads and writes 3615 * on files that are already open). 3616 */ 3617 if (override && error == EACCES && kauth_cred_geteuid(cred) == vattr.va_uid) 3618 error = 0; 3619 return error; 3620 } 3621
Indexes created Thu Oct 02 14:10:14 GMT 2025