nfs_serv.c revision 1.40
1 /* $NetBSD: nfs_serv.c,v 1.40 1998/02/05 08:00:21 mrg Exp $ */ 2 3 /* 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Rick Macklem at The University of Guelph. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)nfs_serv.c 8.7 (Berkeley) 5/14/95 39 */ 40 41 /* 42 * nfs version 2 and 3 server calls to vnode ops 43 * - these routines generally have 3 phases 44 * 1 - break down and validate rpc request in mbuf list 45 * 2 - do the vnode ops for the request 46 * (surprisingly ?? many are very similar to syscalls in vfs_syscalls.c) 47 * 3 - build the rpc reply in an mbuf list 48 * nb: 49 * - do not mix the phases, since the nfsm_?? macros can return failures 50 * on a bad rpc or similar and do not do any vrele() or vput()'s 51 * 52 * - the nfsm_reply() macro generates an nfs rpc reply with the nfs 53 * error number iff error != 0 whereas 54 * returning an error from the server function implies a fatal error 55 * such as a badly constructed rpc request that should be dropped without 56 * a reply. 57 * For Version 3, nfsm_reply() does not return for the error case, since 58 * most version 3 rpcs return more than the status for error cases. 59 */ 60 61 #include <sys/param.h> 62 #include <sys/systm.h> 63 #include <sys/proc.h> 64 #include <sys/file.h> 65 #include <sys/namei.h> 66 #include <sys/vnode.h> 67 #include <sys/mount.h> 68 #include <sys/socket.h> 69 #include <sys/socketvar.h> 70 #include <sys/mbuf.h> 71 #include <sys/dirent.h> 72 #include <sys/stat.h> 73 #include <sys/kernel.h> 74 #include <ufs/ufs/dir.h> 75 76 #include <vm/vm.h> 77 78 #if defined(UVM) 79 #include <uvm/uvm_extern.h> 80 #endif 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/nqnfs.h> 88 #include <nfs/nfs_var.h> 89 90 /* Global vars */ 91 extern u_int32_t nfs_xdrneg1; 92 extern u_int32_t nfs_false, nfs_true; 93 extern enum vtype nv3tov_type[8]; 94 extern struct nfsstats nfsstats; 95 extern nfstype nfsv2_type[9]; 96 extern nfstype nfsv3_type[9]; 97 extern struct nfs_public nfs_pub; 98 int nfsrvw_procrastinate = NFS_GATHERDELAY * 1000; 99 100 /* 101 * nfs v3 access service 102 */ 103 int 104 nfsrv3_access(nfsd, slp, procp, mrq) 105 struct nfsrv_descript *nfsd; 106 struct nfssvc_sock *slp; 107 struct proc *procp; 108 struct mbuf **mrq; 109 { 110 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 111 struct mbuf *nam = nfsd->nd_nam; 112 caddr_t dpos = nfsd->nd_dpos; 113 struct ucred *cred = &nfsd->nd_cr; 114 struct vnode *vp; 115 nfsfh_t nfh; 116 fhandle_t *fhp; 117 register u_int32_t *tl; 118 register int32_t t1; 119 caddr_t bpos; 120 int error = 0, rdonly, cache = 0, getret; 121 char *cp2; 122 struct mbuf *mb, *mreq, *mb2; 123 struct vattr va; 124 u_long inmode, testmode, outmode; 125 u_quad_t frev; 126 127 fhp = &nfh.fh_generic; 128 nfsm_srvmtofh(fhp); 129 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 130 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, &rdonly, 131 (nfsd->nd_flag & ND_KERBAUTH), FALSE); 132 if (error) { 133 nfsm_reply(NFSX_UNSIGNED); 134 nfsm_srvpostop_attr(1, (struct vattr *)0); 135 return (0); 136 } 137 inmode = fxdr_unsigned(u_int32_t, *tl); 138 outmode = 0; 139 if ((inmode & NFSV3ACCESS_READ) && 140 nfsrv_access(vp, VREAD, cred, rdonly, procp, 0) == 0) 141 outmode |= NFSV3ACCESS_READ; 142 if (vp->v_type != VDIR) { 143 testmode = inmode & (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND); 144 if (testmode && 145 nfsrv_access(vp, VWRITE, cred, rdonly, procp, 0) == 0) 146 outmode |= testmode; 147 if ((inmode & NFSV3ACCESS_EXECUTE) && 148 nfsrv_access(vp, VEXEC, cred, rdonly, procp, 0) == 0) 149 outmode |= NFSV3ACCESS_EXECUTE; 150 } else { 151 testmode = inmode & (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | 152 NFSV3ACCESS_DELETE); 153 if (testmode && 154 nfsrv_access(vp, VWRITE, cred, rdonly, procp, 0) == 0) 155 outmode |= testmode; 156 if ((inmode & NFSV3ACCESS_LOOKUP) && 157 nfsrv_access(vp, VEXEC, cred, rdonly, procp, 0) == 0) 158 outmode |= NFSV3ACCESS_LOOKUP; 159 } 160 getret = VOP_GETATTR(vp, &va, cred, procp); 161 vput(vp); 162 nfsm_reply(NFSX_POSTOPATTR(1) + NFSX_UNSIGNED); 163 nfsm_srvpostop_attr(getret, &va); 164 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 165 *tl = txdr_unsigned(outmode); 166 nfsm_srvdone; 167 } 168 169 /* 170 * nfs getattr service 171 */ 172 int 173 nfsrv_getattr(nfsd, slp, procp, mrq) 174 struct nfsrv_descript *nfsd; 175 struct nfssvc_sock *slp; 176 struct proc *procp; 177 struct mbuf **mrq; 178 { 179 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 180 struct mbuf *nam = nfsd->nd_nam; 181 caddr_t dpos = nfsd->nd_dpos; 182 struct ucred *cred = &nfsd->nd_cr; 183 register struct nfs_fattr *fp; 184 struct vattr va; 185 struct vnode *vp; 186 nfsfh_t nfh; 187 fhandle_t *fhp; 188 register u_int32_t *tl; 189 register int32_t t1; 190 caddr_t bpos; 191 int error = 0, rdonly, cache; 192 char *cp2; 193 struct mbuf *mb, *mb2, *mreq; 194 u_quad_t frev; 195 196 fhp = &nfh.fh_generic; 197 nfsm_srvmtofh(fhp); 198 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, &rdonly, 199 (nfsd->nd_flag & ND_KERBAUTH), FALSE); 200 if (error) { 201 nfsm_reply(0); 202 return (0); 203 } 204 nqsrv_getl(vp, ND_READ); 205 error = VOP_GETATTR(vp, &va, cred, procp); 206 vput(vp); 207 nfsm_reply(NFSX_FATTR(nfsd->nd_flag & ND_NFSV3)); 208 if (error) 209 return (0); 210 nfsm_build(fp, struct nfs_fattr *, NFSX_FATTR(nfsd->nd_flag & ND_NFSV3)); 211 nfsm_srvfillattr(&va, fp); 212 nfsm_srvdone; 213 } 214 215 /* 216 * nfs setattr service 217 */ 218 int 219 nfsrv_setattr(nfsd, slp, procp, mrq) 220 struct nfsrv_descript *nfsd; 221 struct nfssvc_sock *slp; 222 struct proc *procp; 223 struct mbuf **mrq; 224 { 225 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 226 struct mbuf *nam = nfsd->nd_nam; 227 caddr_t dpos = nfsd->nd_dpos; 228 struct ucred *cred = &nfsd->nd_cr; 229 struct vattr va, preat; 230 register struct nfsv2_sattr *sp; 231 register struct nfs_fattr *fp; 232 struct vnode *vp; 233 nfsfh_t nfh; 234 fhandle_t *fhp; 235 register u_int32_t *tl; 236 register int32_t t1; 237 caddr_t bpos; 238 int error = 0, rdonly, cache, preat_ret = 1, postat_ret = 1; 239 int v3 = (nfsd->nd_flag & ND_NFSV3), gcheck = 0; 240 char *cp2; 241 struct mbuf *mb, *mb2, *mreq; 242 u_quad_t frev; 243 struct timespec guard; 244 245 fhp = &nfh.fh_generic; 246 nfsm_srvmtofh(fhp); 247 VATTR_NULL(&va); 248 if (v3) { 249 nfsm_srvsattr(&va); 250 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 251 gcheck = fxdr_unsigned(int, *tl); 252 if (gcheck) { 253 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 254 fxdr_nfsv3time(tl, &guard); 255 } 256 } else { 257 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 258 /* 259 * Nah nah nah nah na nah 260 * There is a bug in the Sun client that puts 0xffff in the mode 261 * field of sattr when it should put in 0xffffffff. The u_short 262 * doesn't sign extend. 263 * --> check the low order 2 bytes for 0xffff 264 */ 265 if ((fxdr_unsigned(int, sp->sa_mode) & 0xffff) != 0xffff) 266 va.va_mode = nfstov_mode(sp->sa_mode); 267 if (sp->sa_uid != nfs_xdrneg1) 268 va.va_uid = fxdr_unsigned(uid_t, sp->sa_uid); 269 if (sp->sa_gid != nfs_xdrneg1) 270 va.va_gid = fxdr_unsigned(gid_t, sp->sa_gid); 271 if (sp->sa_size != nfs_xdrneg1) 272 va.va_size = fxdr_unsigned(u_quad_t, sp->sa_size); 273 if (sp->sa_atime.nfsv2_sec != nfs_xdrneg1) { 274 #ifdef notyet 275 fxdr_nfsv2time(&sp->sa_atime, &va.va_atime); 276 #else 277 va.va_atime.tv_sec = 278 fxdr_unsigned(u_int32_t,sp->sa_atime.nfsv2_sec); 279 va.va_atime.tv_nsec = 0; 280 #endif 281 } 282 if (sp->sa_mtime.nfsv2_sec != nfs_xdrneg1) 283 fxdr_nfsv2time(&sp->sa_mtime, &va.va_mtime); 284 285 } 286 287 /* 288 * Now that we have all the fields, lets do it. 289 */ 290 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, &rdonly, 291 (nfsd->nd_flag & ND_KERBAUTH), FALSE); 292 if (error) { 293 nfsm_reply(2 * NFSX_UNSIGNED); 294 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 295 return (0); 296 } 297 nqsrv_getl(vp, ND_WRITE); 298 if (v3) { 299 error = preat_ret = VOP_GETATTR(vp, &preat, cred, procp); 300 if (!error && gcheck && 301 (preat.va_ctime.tv_sec != guard.tv_sec || 302 preat.va_ctime.tv_nsec != guard.tv_nsec)) 303 error = NFSERR_NOT_SYNC; 304 if (error) { 305 vput(vp); 306 nfsm_reply(NFSX_WCCDATA(v3)); 307 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 308 return (0); 309 } 310 } 311 312 /* 313 * If the size is being changed write acces is required, otherwise 314 * just check for a read only file system. 315 */ 316 if (va.va_size == ((u_quad_t)((quad_t) -1))) { 317 if (rdonly || (vp->v_mount->mnt_flag & MNT_RDONLY)) { 318 error = EROFS; 319 goto out; 320 } 321 } else { 322 if (vp->v_type == VDIR) { 323 error = EISDIR; 324 goto out; 325 } else if ((error = nfsrv_access(vp, VWRITE, cred, rdonly, 326 procp, 0)) != 0) 327 goto out; 328 } 329 error = VOP_SETATTR(vp, &va, cred, procp); 330 postat_ret = VOP_GETATTR(vp, &va, cred, procp); 331 if (!error) 332 error = postat_ret; 333 out: 334 vput(vp); 335 nfsm_reply(NFSX_WCCORFATTR(v3)); 336 if (v3) { 337 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 338 return (0); 339 } else { 340 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 341 nfsm_srvfillattr(&va, fp); 342 } 343 nfsm_srvdone; 344 } 345 346 /* 347 * nfs lookup rpc 348 */ 349 int 350 nfsrv_lookup(nfsd, slp, procp, mrq) 351 struct nfsrv_descript *nfsd; 352 struct nfssvc_sock *slp; 353 struct proc *procp; 354 struct mbuf **mrq; 355 { 356 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 357 struct mbuf *nam = nfsd->nd_nam; 358 caddr_t dpos = nfsd->nd_dpos; 359 struct ucred *cred = &nfsd->nd_cr; 360 register struct nfs_fattr *fp; 361 struct nameidata nd, ind, *ndp = &nd; 362 struct vnode *vp, *dirp; 363 nfsfh_t nfh; 364 fhandle_t *fhp; 365 register caddr_t cp; 366 register u_int32_t *tl; 367 register int32_t t1; 368 caddr_t bpos; 369 int error = 0, cache, len, dirattr_ret = 1; 370 int v3 = (nfsd->nd_flag & ND_NFSV3), pubflag; 371 char *cp2; 372 struct mbuf *mb, *mb2, *mreq; 373 struct vattr va, dirattr; 374 u_quad_t frev; 375 376 fhp = &nfh.fh_generic; 377 nfsm_srvmtofh(fhp); 378 nfsm_srvnamesiz(len); 379 380 pubflag = nfs_ispublicfh(fhp); 381 382 nd.ni_cnd.cn_cred = cred; 383 nd.ni_cnd.cn_nameiop = LOOKUP; 384 nd.ni_cnd.cn_flags = LOCKLEAF | SAVESTART; 385 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 386 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), pubflag); 387 388 if (!error && pubflag) { 389 if (nd.ni_vp->v_type == VDIR && nfs_pub.np_index != NULL) { 390 /* 391 * Setup call to lookup() to see if we can find 392 * the index file. Arguably, this doesn't belong 393 * in a kernel.. Ugh. 394 */ 395 ind = nd; 396 VOP_UNLOCK(nd.ni_vp); 397 ind.ni_pathlen = strlen(nfs_pub.np_index); 398 ind.ni_cnd.cn_nameptr = ind.ni_cnd.cn_pnbuf = 399 nfs_pub.np_index; 400 ind.ni_startdir = nd.ni_vp; 401 VREF(ind.ni_startdir); 402 error = lookup(&ind); 403 if (!error) { 404 /* 405 * Found an index file. Get rid of 406 * the old references. 407 */ 408 if (dirp) 409 vrele(dirp); 410 dirp = nd.ni_vp; 411 vrele(nd.ni_startdir); 412 ndp = &ind; 413 } else 414 error = 0; 415 } 416 /* 417 * If the public filehandle was used, check that this lookup 418 * didn't result in a filehandle outside the publicly exported 419 * filesystem. 420 */ 421 422 if (!error && ndp->ni_vp->v_mount != nfs_pub.np_mount) { 423 vput(nd.ni_vp); 424 error = EPERM; 425 } 426 } 427 428 if (dirp) { 429 if (v3) 430 dirattr_ret = VOP_GETATTR(dirp, &dirattr, cred, 431 procp); 432 vrele(dirp); 433 } 434 435 if (error) { 436 nfsm_reply(NFSX_POSTOPATTR(v3)); 437 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 438 return (0); 439 } 440 441 nqsrv_getl(ndp->ni_startdir, ND_READ); 442 vrele(ndp->ni_startdir); 443 FREE(nd.ni_cnd.cn_pnbuf, M_NAMEI); 444 vp = ndp->ni_vp; 445 bzero((caddr_t)fhp, sizeof(nfh)); 446 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; 447 error = VFS_VPTOFH(vp, &fhp->fh_fid); 448 if (!error) 449 error = VOP_GETATTR(vp, &va, cred, procp); 450 vput(vp); 451 nfsm_reply(NFSX_SRVFH(v3) + NFSX_POSTOPORFATTR(v3) + NFSX_POSTOPATTR(v3)); 452 if (error) { 453 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 454 return (0); 455 } 456 nfsm_srvfhtom(fhp, v3); 457 if (v3) { 458 nfsm_srvpostop_attr(0, &va); 459 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 460 } else { 461 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 462 nfsm_srvfillattr(&va, fp); 463 } 464 nfsm_srvdone; 465 } 466 467 /* 468 * nfs readlink service 469 */ 470 int 471 nfsrv_readlink(nfsd, slp, procp, mrq) 472 struct nfsrv_descript *nfsd; 473 struct nfssvc_sock *slp; 474 struct proc *procp; 475 struct mbuf **mrq; 476 { 477 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 478 struct mbuf *nam = nfsd->nd_nam; 479 caddr_t dpos = nfsd->nd_dpos; 480 struct ucred *cred = &nfsd->nd_cr; 481 struct iovec iv[(NFS_MAXPATHLEN+MLEN-1)/MLEN]; 482 register struct iovec *ivp = iv; 483 register struct mbuf *mp; 484 register u_int32_t *tl; 485 register int32_t t1; 486 caddr_t bpos; 487 int error = 0, rdonly, cache, i, tlen, len, getret; 488 int v3 = (nfsd->nd_flag & ND_NFSV3); 489 char *cp2; 490 struct mbuf *mb, *mb2, *mp2 = NULL, *mp3 = NULL, *mreq; 491 struct vnode *vp; 492 struct vattr attr; 493 nfsfh_t nfh; 494 fhandle_t *fhp; 495 struct uio io, *uiop = &io; 496 u_quad_t frev; 497 498 fhp = &nfh.fh_generic; 499 nfsm_srvmtofh(fhp); 500 len = 0; 501 i = 0; 502 while (len < NFS_MAXPATHLEN) { 503 MGET(mp, M_WAIT, MT_DATA); 504 MCLGET(mp, M_WAIT); 505 mp->m_len = NFSMSIZ(mp); 506 if (len == 0) 507 mp3 = mp2 = mp; 508 else { 509 mp2->m_next = mp; 510 mp2 = mp; 511 } 512 if ((len+mp->m_len) > NFS_MAXPATHLEN) { 513 mp->m_len = NFS_MAXPATHLEN-len; 514 len = NFS_MAXPATHLEN; 515 } else 516 len += mp->m_len; 517 ivp->iov_base = mtod(mp, caddr_t); 518 ivp->iov_len = mp->m_len; 519 i++; 520 ivp++; 521 } 522 uiop->uio_iov = iv; 523 uiop->uio_iovcnt = i; 524 uiop->uio_offset = 0; 525 uiop->uio_resid = len; 526 uiop->uio_rw = UIO_READ; 527 uiop->uio_segflg = UIO_SYSSPACE; 528 uiop->uio_procp = (struct proc *)0; 529 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 530 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 531 if (error) { 532 m_freem(mp3); 533 nfsm_reply(2 * NFSX_UNSIGNED); 534 nfsm_srvpostop_attr(1, (struct vattr *)0); 535 return (0); 536 } 537 if (vp->v_type != VLNK) { 538 if (v3) 539 error = EINVAL; 540 else 541 error = ENXIO; 542 goto out; 543 } 544 nqsrv_getl(vp, ND_READ); 545 error = VOP_READLINK(vp, uiop, cred); 546 out: 547 getret = VOP_GETATTR(vp, &attr, cred, procp); 548 vput(vp); 549 if (error) 550 m_freem(mp3); 551 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_UNSIGNED); 552 if (v3) { 553 nfsm_srvpostop_attr(getret, &attr); 554 if (error) 555 return (0); 556 } 557 if (uiop->uio_resid > 0) { 558 len -= uiop->uio_resid; 559 tlen = nfsm_rndup(len); 560 nfsm_adj(mp3, NFS_MAXPATHLEN-tlen, tlen-len); 561 } 562 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 563 *tl = txdr_unsigned(len); 564 mb->m_next = mp3; 565 nfsm_srvdone; 566 } 567 568 /* 569 * nfs read service 570 */ 571 int 572 nfsrv_read(nfsd, slp, procp, mrq) 573 struct nfsrv_descript *nfsd; 574 struct nfssvc_sock *slp; 575 struct proc *procp; 576 struct mbuf **mrq; 577 { 578 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 579 struct mbuf *nam = nfsd->nd_nam; 580 caddr_t dpos = nfsd->nd_dpos; 581 struct ucred *cred = &nfsd->nd_cr; 582 register struct iovec *iv; 583 struct iovec *iv2; 584 register struct mbuf *m; 585 register struct nfs_fattr *fp; 586 register u_int32_t *tl; 587 register int32_t t1; 588 register int i; 589 caddr_t bpos; 590 int error = 0, rdonly, cache, cnt, len, left, siz, tlen, getret; 591 int v3 = (nfsd->nd_flag & ND_NFSV3), reqlen; 592 char *cp2; 593 struct mbuf *mb, *mb2, *mreq; 594 struct mbuf *m2; 595 struct vnode *vp; 596 nfsfh_t nfh; 597 fhandle_t *fhp; 598 struct uio io, *uiop = &io; 599 struct vattr va; 600 off_t off; 601 u_quad_t frev; 602 603 fhp = &nfh.fh_generic; 604 nfsm_srvmtofh(fhp); 605 if (v3) { 606 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 607 fxdr_hyper(tl, &off); 608 } else { 609 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 610 off = (off_t)fxdr_unsigned(u_int32_t, *tl); 611 } 612 nfsm_srvstrsiz(reqlen, NFS_SRVMAXDATA(nfsd)); 613 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 614 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 615 if (error) { 616 nfsm_reply(2 * NFSX_UNSIGNED); 617 nfsm_srvpostop_attr(1, (struct vattr *)0); 618 return (0); 619 } 620 if (vp->v_type != VREG) { 621 if (v3) 622 error = EINVAL; 623 else 624 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 625 } 626 if (!error) { 627 nqsrv_getl(vp, ND_READ); 628 if ((error = nfsrv_access(vp, VREAD, cred, rdonly, procp, 1)) != 0) 629 error = nfsrv_access(vp, VEXEC, cred, rdonly, procp, 1); 630 } 631 getret = VOP_GETATTR(vp, &va, cred, procp); 632 if (!error) 633 error = getret; 634 if (error) { 635 vput(vp); 636 nfsm_reply(NFSX_POSTOPATTR(v3)); 637 nfsm_srvpostop_attr(getret, &va); 638 return (0); 639 } 640 if (off >= va.va_size) 641 cnt = 0; 642 else if ((off + reqlen) > va.va_size) 643 cnt = nfsm_rndup(va.va_size - off); 644 else 645 cnt = reqlen; 646 nfsm_reply(NFSX_POSTOPORFATTR(v3) + 3 * NFSX_UNSIGNED+nfsm_rndup(cnt)); 647 if (v3) { 648 nfsm_build(tl, u_int32_t *, NFSX_V3FATTR + 4 * NFSX_UNSIGNED); 649 *tl++ = nfs_true; 650 fp = (struct nfs_fattr *)tl; 651 tl += (NFSX_V3FATTR / sizeof (u_int32_t)); 652 } else { 653 nfsm_build(tl, u_int32_t *, NFSX_V2FATTR + NFSX_UNSIGNED); 654 fp = (struct nfs_fattr *)tl; 655 tl += (NFSX_V2FATTR / sizeof (u_int32_t)); 656 } 657 len = left = cnt; 658 if (cnt > 0) { 659 /* 660 * Generate the mbuf list with the uio_iov ref. to it. 661 */ 662 i = 0; 663 m = m2 = mb; 664 while (left > 0) { 665 siz = min(M_TRAILINGSPACE(m), left); 666 if (siz > 0) { 667 left -= siz; 668 i++; 669 } 670 if (left > 0) { 671 MGET(m, M_WAIT, MT_DATA); 672 MCLGET(m, M_WAIT); 673 m->m_len = 0; 674 m2->m_next = m; 675 m2 = m; 676 } 677 } 678 MALLOC(iv, struct iovec *, i * sizeof (struct iovec), 679 M_TEMP, M_WAITOK); 680 uiop->uio_iov = iv2 = iv; 681 m = mb; 682 left = cnt; 683 i = 0; 684 while (left > 0) { 685 if (m == NULL) 686 panic("nfsrv_read iov"); 687 siz = min(M_TRAILINGSPACE(m), left); 688 if (siz > 0) { 689 iv->iov_base = mtod(m, caddr_t) + m->m_len; 690 iv->iov_len = siz; 691 m->m_len += siz; 692 left -= siz; 693 iv++; 694 i++; 695 } 696 m = m->m_next; 697 } 698 uiop->uio_iovcnt = i; 699 uiop->uio_offset = off; 700 uiop->uio_resid = cnt; 701 uiop->uio_rw = UIO_READ; 702 uiop->uio_segflg = UIO_SYSSPACE; 703 error = VOP_READ(vp, uiop, IO_NODELOCKED, cred); 704 off = uiop->uio_offset; 705 FREE((caddr_t)iv2, M_TEMP); 706 if (error || (getret = VOP_GETATTR(vp, &va, cred, procp)) != 0){ 707 if (!error) 708 error = getret; 709 m_freem(mreq); 710 vput(vp); 711 nfsm_reply(NFSX_POSTOPATTR(v3)); 712 nfsm_srvpostop_attr(getret, &va); 713 return (0); 714 } 715 } else 716 uiop->uio_resid = 0; 717 vput(vp); 718 nfsm_srvfillattr(&va, fp); 719 len -= uiop->uio_resid; 720 tlen = nfsm_rndup(len); 721 if (cnt != tlen || tlen != len) 722 nfsm_adj(mb, cnt - tlen, tlen - len); 723 if (v3) { 724 *tl++ = txdr_unsigned(len); 725 if (len < reqlen) 726 *tl++ = nfs_true; 727 else 728 *tl++ = nfs_false; 729 } 730 *tl = txdr_unsigned(len); 731 nfsm_srvdone; 732 } 733 734 /* 735 * nfs write service 736 */ 737 int 738 nfsrv_write(nfsd, slp, procp, mrq) 739 struct nfsrv_descript *nfsd; 740 struct nfssvc_sock *slp; 741 struct proc *procp; 742 struct mbuf **mrq; 743 { 744 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 745 struct mbuf *nam = nfsd->nd_nam; 746 caddr_t dpos = nfsd->nd_dpos; 747 struct ucred *cred = &nfsd->nd_cr; 748 register struct iovec *ivp; 749 register int i, cnt; 750 register struct mbuf *mp; 751 register struct nfs_fattr *fp; 752 struct iovec *iv; 753 struct vattr va, forat; 754 register u_int32_t *tl; 755 register int32_t t1; 756 caddr_t bpos; 757 int error = 0, rdonly, cache, len, forat_ret = 1; 758 int ioflags, aftat_ret = 1, retlen, zeroing, adjust; 759 int stable = NFSV3WRITE_FILESYNC; 760 int v3 = (nfsd->nd_flag & ND_NFSV3); 761 char *cp2; 762 struct mbuf *mb, *mb2, *mreq; 763 struct vnode *vp; 764 nfsfh_t nfh; 765 fhandle_t *fhp; 766 struct uio io, *uiop = &io; 767 off_t off; 768 u_quad_t frev; 769 770 if (mrep == NULL) { 771 *mrq = NULL; 772 return (0); 773 } 774 fhp = &nfh.fh_generic; 775 nfsm_srvmtofh(fhp); 776 if (v3) { 777 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 778 fxdr_hyper(tl, &off); 779 tl += 3; 780 stable = fxdr_unsigned(int, *tl++); 781 } else { 782 nfsm_dissect(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 783 off = (off_t)fxdr_unsigned(u_int32_t, *++tl); 784 tl += 2; 785 } 786 retlen = len = fxdr_unsigned(int32_t, *tl); 787 cnt = i = 0; 788 789 /* 790 * For NFS Version 2, it is not obvious what a write of zero length 791 * should do, but I might as well be consistent with Version 3, 792 * which is to return ok so long as there are no permission problems. 793 */ 794 if (len > 0) { 795 zeroing = 1; 796 mp = mrep; 797 while (mp) { 798 if (mp == md) { 799 zeroing = 0; 800 adjust = dpos - mtod(mp, caddr_t); 801 mp->m_len -= adjust; 802 if (mp->m_len > 0 && adjust > 0) 803 NFSMADV(mp, adjust); 804 } 805 if (zeroing) 806 mp->m_len = 0; 807 else if (mp->m_len > 0) { 808 i += mp->m_len; 809 if (i > len) { 810 mp->m_len -= (i - len); 811 zeroing = 1; 812 } 813 if (mp->m_len > 0) 814 cnt++; 815 } 816 mp = mp->m_next; 817 } 818 } 819 if (len > NFS_MAXDATA || len < 0 || i < len) { 820 error = EIO; 821 nfsm_reply(2 * NFSX_UNSIGNED); 822 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 823 return (0); 824 } 825 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 826 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 827 if (error) { 828 nfsm_reply(2 * NFSX_UNSIGNED); 829 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 830 return (0); 831 } 832 if (v3) 833 forat_ret = VOP_GETATTR(vp, &forat, cred, procp); 834 if (vp->v_type != VREG) { 835 if (v3) 836 error = EINVAL; 837 else 838 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 839 } 840 if (!error) { 841 nqsrv_getl(vp, ND_WRITE); 842 error = nfsrv_access(vp, VWRITE, cred, rdonly, procp, 1); 843 } 844 if (error) { 845 vput(vp); 846 nfsm_reply(NFSX_WCCDATA(v3)); 847 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 848 return (0); 849 } 850 851 if (len > 0) { 852 MALLOC(ivp, struct iovec *, cnt * sizeof (struct iovec), M_TEMP, 853 M_WAITOK); 854 uiop->uio_iov = iv = ivp; 855 uiop->uio_iovcnt = cnt; 856 mp = mrep; 857 while (mp) { 858 if (mp->m_len > 0) { 859 ivp->iov_base = mtod(mp, caddr_t); 860 ivp->iov_len = mp->m_len; 861 ivp++; 862 } 863 mp = mp->m_next; 864 } 865 866 /* 867 * XXX 868 * The IO_METASYNC flag indicates that all metadata (and not just 869 * enough to ensure data integrity) mus be written to stable storage 870 * synchronously. 871 * (IO_METASYNC is not yet implemented in 4.4BSD-Lite.) 872 */ 873 if (stable == NFSV3WRITE_UNSTABLE) 874 ioflags = IO_NODELOCKED; 875 else if (stable == NFSV3WRITE_DATASYNC) 876 ioflags = (IO_SYNC | IO_NODELOCKED); 877 else 878 ioflags = (IO_METASYNC | IO_SYNC | IO_NODELOCKED); 879 uiop->uio_resid = len; 880 uiop->uio_rw = UIO_WRITE; 881 uiop->uio_segflg = UIO_SYSSPACE; 882 uiop->uio_procp = (struct proc *)0; 883 uiop->uio_offset = off; 884 error = VOP_WRITE(vp, uiop, ioflags, cred); 885 nfsstats.srvvop_writes++; 886 FREE((caddr_t)iv, M_TEMP); 887 } 888 aftat_ret = VOP_GETATTR(vp, &va, cred, procp); 889 vput(vp); 890 if (!error) 891 error = aftat_ret; 892 nfsm_reply(NFSX_PREOPATTR(v3) + NFSX_POSTOPORFATTR(v3) + 893 2 * NFSX_UNSIGNED + NFSX_WRITEVERF(v3)); 894 if (v3) { 895 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 896 if (error) 897 return (0); 898 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 899 *tl++ = txdr_unsigned(retlen); 900 if (stable == NFSV3WRITE_UNSTABLE) 901 *tl++ = txdr_unsigned(stable); 902 else 903 *tl++ = txdr_unsigned(NFSV3WRITE_FILESYNC); 904 /* 905 * Actually, there is no need to txdr these fields, 906 * but it may make the values more human readable, 907 * for debugging purposes. 908 */ 909 *tl++ = txdr_unsigned(boottime.tv_sec); 910 *tl = txdr_unsigned(boottime.tv_usec); 911 } else { 912 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 913 nfsm_srvfillattr(&va, fp); 914 } 915 nfsm_srvdone; 916 } 917 918 /* 919 * NFS write service with write gathering support. Called when 920 * nfsrvw_procrastinate > 0. 921 * See: Chet Juszczak, "Improving the Write Performance of an NFS Server", 922 * in Proc. of the Winter 1994 Usenix Conference, pg. 247-259, San Franscisco, 923 * Jan. 1994. 924 */ 925 int 926 nfsrv_writegather(ndp, slp, procp, mrq) 927 struct nfsrv_descript **ndp; 928 struct nfssvc_sock *slp; 929 struct proc *procp; 930 struct mbuf **mrq; 931 { 932 register struct iovec *ivp; 933 register struct mbuf *mp; 934 register struct nfsrv_descript *wp, *nfsd, *owp, *swp; 935 register struct nfs_fattr *fp; 936 register int i = 0; 937 struct iovec *iov; 938 struct nfsrvw_delayhash *wpp; 939 struct ucred *cred; 940 struct vattr va, forat; 941 register u_int32_t *tl; 942 register int32_t t1; 943 caddr_t bpos, dpos; 944 int error = 0, rdonly, cache, len = 0, forat_ret = 1; 945 int ioflags, aftat_ret = 1, s, adjust, v3, zeroing; 946 char *cp2; 947 struct mbuf *mb, *mb2, *mreq, *mrep, *md; 948 struct vnode *vp; 949 struct uio io, *uiop = &io; 950 u_quad_t frev, cur_usec; 951 952 *mrq = NULL; 953 if (*ndp) { 954 nfsd = *ndp; 955 *ndp = NULL; 956 mrep = nfsd->nd_mrep; 957 md = nfsd->nd_md; 958 dpos = nfsd->nd_dpos; 959 cred = &nfsd->nd_cr; 960 v3 = (nfsd->nd_flag & ND_NFSV3); 961 LIST_INIT(&nfsd->nd_coalesce); 962 nfsd->nd_mreq = NULL; 963 nfsd->nd_stable = NFSV3WRITE_FILESYNC; 964 cur_usec = (u_quad_t)time.tv_sec * 1000000 + (u_quad_t)time.tv_usec; 965 nfsd->nd_time = cur_usec + nfsrvw_procrastinate; 966 967 /* 968 * Now, get the write header.. 969 */ 970 nfsm_srvmtofh(&nfsd->nd_fh); 971 if (v3) { 972 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 973 fxdr_hyper(tl, &nfsd->nd_off); 974 tl += 3; 975 nfsd->nd_stable = fxdr_unsigned(int, *tl++); 976 } else { 977 nfsm_dissect(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 978 nfsd->nd_off = (off_t)fxdr_unsigned(u_int32_t, *++tl); 979 tl += 2; 980 } 981 len = fxdr_unsigned(int32_t, *tl); 982 nfsd->nd_len = len; 983 nfsd->nd_eoff = nfsd->nd_off + len; 984 985 /* 986 * Trim the header out of the mbuf list and trim off any trailing 987 * junk so that the mbuf list has only the write data. 988 */ 989 zeroing = 1; 990 i = 0; 991 mp = mrep; 992 while (mp) { 993 if (mp == md) { 994 zeroing = 0; 995 adjust = dpos - mtod(mp, caddr_t); 996 mp->m_len -= adjust; 997 if (mp->m_len > 0 && adjust > 0) 998 NFSMADV(mp, adjust); 999 } 1000 if (zeroing) 1001 mp->m_len = 0; 1002 else { 1003 i += mp->m_len; 1004 if (i > len) { 1005 mp->m_len -= (i - len); 1006 zeroing = 1; 1007 } 1008 } 1009 mp = mp->m_next; 1010 } 1011 if (len > NFS_MAXDATA || len < 0 || i < len) { 1012 nfsmout: 1013 m_freem(mrep); 1014 error = EIO; 1015 nfsm_writereply(2 * NFSX_UNSIGNED, v3); 1016 if (v3) 1017 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1018 nfsd->nd_mreq = mreq; 1019 nfsd->nd_mrep = NULL; 1020 nfsd->nd_time = 0; 1021 } 1022 1023 /* 1024 * Add this entry to the hash and time queues. 1025 */ 1026 s = splsoftclock(); 1027 owp = NULL; 1028 wp = slp->ns_tq.lh_first; 1029 while (wp && wp->nd_time < nfsd->nd_time) { 1030 owp = wp; 1031 wp = wp->nd_tq.le_next; 1032 } 1033 if (owp) { 1034 LIST_INSERT_AFTER(owp, nfsd, nd_tq); 1035 } else { 1036 LIST_INSERT_HEAD(&slp->ns_tq, nfsd, nd_tq); 1037 } 1038 if (nfsd->nd_mrep) { 1039 wpp = NWDELAYHASH(slp, nfsd->nd_fh.fh_fid.fid_data); 1040 owp = NULL; 1041 wp = wpp->lh_first; 1042 while (wp && 1043 bcmp((caddr_t)&nfsd->nd_fh,(caddr_t)&wp->nd_fh,NFSX_V3FH)) { 1044 owp = wp; 1045 wp = wp->nd_hash.le_next; 1046 } 1047 while (wp && wp->nd_off < nfsd->nd_off && 1048 !bcmp((caddr_t)&nfsd->nd_fh,(caddr_t)&wp->nd_fh,NFSX_V3FH)) { 1049 owp = wp; 1050 wp = wp->nd_hash.le_next; 1051 } 1052 if (owp) { 1053 LIST_INSERT_AFTER(owp, nfsd, nd_hash); 1054 1055 /* 1056 * Search the hash list for overlapping entries and 1057 * coalesce. 1058 */ 1059 for(; nfsd && NFSW_CONTIG(owp, nfsd); nfsd = wp) { 1060 wp = nfsd->nd_hash.le_next; 1061 if (NFSW_SAMECRED(owp, nfsd)) 1062 nfsrvw_coalesce(owp, nfsd); 1063 } 1064 } else { 1065 LIST_INSERT_HEAD(wpp, nfsd, nd_hash); 1066 } 1067 } 1068 splx(s); 1069 } 1070 1071 /* 1072 * Now, do VOP_WRITE()s for any one(s) that need to be done now 1073 * and generate the associated reply mbuf list(s). 1074 */ 1075 loop1: 1076 cur_usec = (u_quad_t)time.tv_sec * 1000000 + (u_quad_t)time.tv_usec; 1077 s = splsoftclock(); 1078 for (nfsd = slp->ns_tq.lh_first; nfsd; nfsd = owp) { 1079 owp = nfsd->nd_tq.le_next; 1080 if (nfsd->nd_time > cur_usec) 1081 break; 1082 if (nfsd->nd_mreq) 1083 continue; 1084 LIST_REMOVE(nfsd, nd_tq); 1085 LIST_REMOVE(nfsd, nd_hash); 1086 splx(s); 1087 mrep = nfsd->nd_mrep; 1088 nfsd->nd_mrep = NULL; 1089 cred = &nfsd->nd_cr; 1090 v3 = (nfsd->nd_flag & ND_NFSV3); 1091 forat_ret = aftat_ret = 1; 1092 error = nfsrv_fhtovp(&nfsd->nd_fh, 1, &vp, cred, slp, 1093 nfsd->nd_nam, &rdonly, (nfsd->nd_flag & ND_KERBAUTH), 1094 FALSE); 1095 if (!error) { 1096 if (v3) 1097 forat_ret = VOP_GETATTR(vp, &forat, cred, procp); 1098 if (vp->v_type != VREG) { 1099 if (v3) 1100 error = EINVAL; 1101 else 1102 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 1103 } 1104 } else 1105 vp = NULL; 1106 if (!error) { 1107 nqsrv_getl(vp, ND_WRITE); 1108 error = nfsrv_access(vp, VWRITE, cred, rdonly, procp, 1); 1109 } 1110 1111 if (nfsd->nd_stable == NFSV3WRITE_UNSTABLE) 1112 ioflags = IO_NODELOCKED; 1113 else if (nfsd->nd_stable == NFSV3WRITE_DATASYNC) 1114 ioflags = (IO_SYNC | IO_NODELOCKED); 1115 else 1116 ioflags = (IO_METASYNC | IO_SYNC | IO_NODELOCKED); 1117 uiop->uio_rw = UIO_WRITE; 1118 uiop->uio_segflg = UIO_SYSSPACE; 1119 uiop->uio_procp = (struct proc *)0; 1120 uiop->uio_offset = nfsd->nd_off; 1121 uiop->uio_resid = nfsd->nd_eoff - nfsd->nd_off; 1122 if (uiop->uio_resid > 0) { 1123 mp = mrep; 1124 i = 0; 1125 while (mp) { 1126 if (mp->m_len > 0) 1127 i++; 1128 mp = mp->m_next; 1129 } 1130 uiop->uio_iovcnt = i; 1131 MALLOC(iov, struct iovec *, i * sizeof (struct iovec), 1132 M_TEMP, M_WAITOK); 1133 uiop->uio_iov = ivp = iov; 1134 mp = mrep; 1135 while (mp) { 1136 if (mp->m_len > 0) { 1137 ivp->iov_base = mtod(mp, caddr_t); 1138 ivp->iov_len = mp->m_len; 1139 ivp++; 1140 } 1141 mp = mp->m_next; 1142 } 1143 if (!error) { 1144 error = VOP_WRITE(vp, uiop, ioflags, cred); 1145 nfsstats.srvvop_writes++; 1146 } 1147 FREE((caddr_t)iov, M_TEMP); 1148 } 1149 m_freem(mrep); 1150 if (vp) { 1151 aftat_ret = VOP_GETATTR(vp, &va, cred, procp); 1152 vput(vp); 1153 } 1154 1155 /* 1156 * Loop around generating replies for all write rpcs that have 1157 * now been completed. 1158 */ 1159 swp = nfsd; 1160 do { 1161 if (error) { 1162 nfsm_writereply(NFSX_WCCDATA(v3), v3); 1163 if (v3) { 1164 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1165 } 1166 } else { 1167 nfsm_writereply(NFSX_PREOPATTR(v3) + 1168 NFSX_POSTOPORFATTR(v3) + 2 * NFSX_UNSIGNED + 1169 NFSX_WRITEVERF(v3), v3); 1170 if (v3) { 1171 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1172 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1173 *tl++ = txdr_unsigned(nfsd->nd_len); 1174 *tl++ = txdr_unsigned(swp->nd_stable); 1175 /* 1176 * Actually, there is no need to txdr these fields, 1177 * but it may make the values more human readable, 1178 * for debugging purposes. 1179 */ 1180 *tl++ = txdr_unsigned(boottime.tv_sec); 1181 *tl = txdr_unsigned(boottime.tv_usec); 1182 } else { 1183 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 1184 nfsm_srvfillattr(&va, fp); 1185 } 1186 } 1187 nfsd->nd_mreq = mreq; 1188 if (nfsd->nd_mrep) 1189 panic("nfsrv_write: nd_mrep not free"); 1190 1191 /* 1192 * Done. Put it at the head of the timer queue so that 1193 * the final phase can return the reply. 1194 */ 1195 s = splsoftclock(); 1196 if (nfsd != swp) { 1197 nfsd->nd_time = 0; 1198 LIST_INSERT_HEAD(&slp->ns_tq, nfsd, nd_tq); 1199 } 1200 nfsd = swp->nd_coalesce.lh_first; 1201 if (nfsd) { 1202 LIST_REMOVE(nfsd, nd_tq); 1203 } 1204 splx(s); 1205 } while (nfsd); 1206 s = splsoftclock(); 1207 swp->nd_time = 0; 1208 LIST_INSERT_HEAD(&slp->ns_tq, swp, nd_tq); 1209 splx(s); 1210 goto loop1; 1211 } 1212 splx(s); 1213 1214 /* 1215 * Search for a reply to return. 1216 */ 1217 s = splsoftclock(); 1218 for (nfsd = slp->ns_tq.lh_first; nfsd; nfsd = nfsd->nd_tq.le_next) 1219 if (nfsd->nd_mreq) { 1220 LIST_REMOVE(nfsd, nd_tq); 1221 *mrq = nfsd->nd_mreq; 1222 *ndp = nfsd; 1223 break; 1224 } 1225 splx(s); 1226 return (0); 1227 } 1228 1229 /* 1230 * Coalesce the write request nfsd into owp. To do this we must: 1231 * - remove nfsd from the queues 1232 * - merge nfsd->nd_mrep into owp->nd_mrep 1233 * - update the nd_eoff and nd_stable for owp 1234 * - put nfsd on owp's nd_coalesce list 1235 * NB: Must be called at splsoftclock(). 1236 */ 1237 void 1238 nfsrvw_coalesce(owp, nfsd) 1239 register struct nfsrv_descript *owp; 1240 register struct nfsrv_descript *nfsd; 1241 { 1242 register int overlap; 1243 register struct mbuf *mp; 1244 1245 LIST_REMOVE(nfsd, nd_hash); 1246 LIST_REMOVE(nfsd, nd_tq); 1247 if (owp->nd_eoff < nfsd->nd_eoff) { 1248 overlap = owp->nd_eoff - nfsd->nd_off; 1249 if (overlap < 0) 1250 panic("nfsrv_coalesce: bad off"); 1251 if (overlap > 0) 1252 m_adj(nfsd->nd_mrep, overlap); 1253 mp = owp->nd_mrep; 1254 while (mp->m_next) 1255 mp = mp->m_next; 1256 mp->m_next = nfsd->nd_mrep; 1257 owp->nd_eoff = nfsd->nd_eoff; 1258 } else 1259 m_freem(nfsd->nd_mrep); 1260 nfsd->nd_mrep = NULL; 1261 if (nfsd->nd_stable == NFSV3WRITE_FILESYNC) 1262 owp->nd_stable = NFSV3WRITE_FILESYNC; 1263 else if (nfsd->nd_stable == NFSV3WRITE_DATASYNC && 1264 owp->nd_stable == NFSV3WRITE_UNSTABLE) 1265 owp->nd_stable = NFSV3WRITE_DATASYNC; 1266 LIST_INSERT_HEAD(&owp->nd_coalesce, nfsd, nd_tq); 1267 /* 1268 * nfsd might hold coalesce elements! Move them to owp. 1269 * Otherwise, requests may be lost and clients will be stuck. 1270 */ 1271 if (nfsd->nd_coalesce.lh_first) 1272 { 1273 register struct nfsrv_descript *m; 1274 1275 while ((m = nfsd->nd_coalesce.lh_first)) 1276 { 1277 LIST_REMOVE(m, nd_tq); 1278 LIST_INSERT_HEAD(&owp->nd_coalesce, m, nd_tq); 1279 } 1280 } 1281 } 1282 1283 /* 1284 * nfs create service 1285 * now does a truncate to 0 length via. setattr if it already exists 1286 */ 1287 int 1288 nfsrv_create(nfsd, slp, procp, mrq) 1289 struct nfsrv_descript *nfsd; 1290 struct nfssvc_sock *slp; 1291 struct proc *procp; 1292 struct mbuf **mrq; 1293 { 1294 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1295 struct mbuf *nam = nfsd->nd_nam; 1296 caddr_t dpos = nfsd->nd_dpos; 1297 struct ucred *cred = &nfsd->nd_cr; 1298 register struct nfs_fattr *fp; 1299 struct vattr va, dirfor, diraft; 1300 register struct nfsv2_sattr *sp; 1301 register u_int32_t *tl; 1302 struct nameidata nd; 1303 register caddr_t cp; 1304 register int32_t t1; 1305 caddr_t bpos; 1306 int error = 0, cache, len, tsize, dirfor_ret = 1, diraft_ret = 1; 1307 int rdev = 0; 1308 int v3 = (nfsd->nd_flag & ND_NFSV3), how, exclusive_flag = 0; 1309 char *cp2; 1310 struct mbuf *mb, *mb2, *mreq; 1311 struct vnode *vp = NULL, *dirp = NULL; 1312 nfsfh_t nfh; 1313 fhandle_t *fhp; 1314 u_quad_t frev, tempsize; 1315 u_char cverf[NFSX_V3CREATEVERF]; 1316 1317 nd.ni_cnd.cn_nameiop = 0; 1318 fhp = &nfh.fh_generic; 1319 nfsm_srvmtofh(fhp); 1320 nfsm_srvnamesiz(len); 1321 nd.ni_cnd.cn_cred = cred; 1322 nd.ni_cnd.cn_nameiop = CREATE; 1323 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF | SAVESTART; 1324 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 1325 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1326 if (dirp) { 1327 if (v3) 1328 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 1329 procp); 1330 else { 1331 vrele(dirp); 1332 dirp = (struct vnode *)0; 1333 } 1334 } 1335 if (error) { 1336 nfsm_reply(NFSX_WCCDATA(v3)); 1337 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1338 if (dirp) 1339 vrele(dirp); 1340 return (0); 1341 } 1342 VATTR_NULL(&va); 1343 if (v3) { 1344 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1345 how = fxdr_unsigned(int, *tl); 1346 switch (how) { 1347 case NFSV3CREATE_GUARDED: 1348 if (nd.ni_vp) { 1349 error = EEXIST; 1350 break; 1351 } 1352 case NFSV3CREATE_UNCHECKED: 1353 nfsm_srvsattr(&va); 1354 break; 1355 case NFSV3CREATE_EXCLUSIVE: 1356 nfsm_dissect(cp, caddr_t, NFSX_V3CREATEVERF); 1357 bcopy(cp, cverf, NFSX_V3CREATEVERF); 1358 exclusive_flag = 1; 1359 if (nd.ni_vp == NULL) 1360 va.va_mode = 0; 1361 break; 1362 }; 1363 va.va_type = VREG; 1364 } else { 1365 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1366 va.va_type = IFTOVT(fxdr_unsigned(u_int32_t, sp->sa_mode)); 1367 if (va.va_type == VNON) 1368 va.va_type = VREG; 1369 va.va_mode = nfstov_mode(sp->sa_mode); 1370 switch (va.va_type) { 1371 case VREG: 1372 tsize = fxdr_unsigned(int32_t, sp->sa_size); 1373 if (tsize != -1) 1374 va.va_size = (u_quad_t)tsize; 1375 break; 1376 case VCHR: 1377 case VBLK: 1378 case VFIFO: 1379 rdev = fxdr_unsigned(int32_t, sp->sa_size); 1380 break; 1381 default: 1382 break; 1383 }; 1384 } 1385 1386 /* 1387 * Iff doesn't exist, create it 1388 * otherwise just truncate to 0 length 1389 * should I set the mode too ?? 1390 */ 1391 if (nd.ni_vp == NULL) { 1392 if (va.va_type == VREG || va.va_type == VSOCK) { 1393 vrele(nd.ni_startdir); 1394 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1395 error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1396 if (!error) { 1397 FREE(nd.ni_cnd.cn_pnbuf, M_NAMEI); 1398 if (exclusive_flag) { 1399 exclusive_flag = 0; 1400 VATTR_NULL(&va); 1401 bcopy(cverf, (caddr_t)&va.va_atime, 1402 NFSX_V3CREATEVERF); 1403 error = VOP_SETATTR(nd.ni_vp, &va, cred, 1404 procp); 1405 } 1406 } 1407 } else if (va.va_type == VCHR || va.va_type == VBLK || 1408 va.va_type == VFIFO) { 1409 if (va.va_type == VCHR && rdev == 0xffffffff) 1410 va.va_type = VFIFO; 1411 error = suser(cred, (u_short *)0); 1412 if (error) { 1413 vrele(nd.ni_startdir); 1414 free(nd.ni_cnd.cn_pnbuf, M_NAMEI); 1415 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1416 vput(nd.ni_dvp); 1417 nfsm_reply(0); 1418 return (error); 1419 } else 1420 va.va_rdev = (dev_t)rdev; 1421 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1422 error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, 1423 &va); 1424 if (error) { 1425 vrele(nd.ni_startdir); 1426 nfsm_reply(0); 1427 } 1428 nd.ni_cnd.cn_nameiop = LOOKUP; 1429 nd.ni_cnd.cn_flags &= ~(LOCKPARENT | SAVESTART); 1430 nd.ni_cnd.cn_proc = procp; 1431 nd.ni_cnd.cn_cred = cred; 1432 if ((error = lookup(&nd)) != 0) { 1433 free(nd.ni_cnd.cn_pnbuf, M_NAMEI); 1434 nfsm_reply(0); 1435 } 1436 FREE(nd.ni_cnd.cn_pnbuf, M_NAMEI); 1437 if (nd.ni_cnd.cn_flags & ISSYMLINK) { 1438 vrele(nd.ni_dvp); 1439 vput(nd.ni_vp); 1440 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1441 error = EINVAL; 1442 nfsm_reply(0); 1443 } 1444 } else { 1445 vrele(nd.ni_startdir); 1446 free(nd.ni_cnd.cn_pnbuf, M_NAMEI); 1447 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1448 vput(nd.ni_dvp); 1449 error = ENXIO; 1450 } 1451 vp = nd.ni_vp; 1452 } else { 1453 vrele(nd.ni_startdir); 1454 free(nd.ni_cnd.cn_pnbuf, M_NAMEI); 1455 vp = nd.ni_vp; 1456 if (nd.ni_dvp == vp) 1457 vrele(nd.ni_dvp); 1458 else 1459 vput(nd.ni_dvp); 1460 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1461 if (va.va_size != -1) { 1462 error = nfsrv_access(vp, VWRITE, cred, 1463 (nd.ni_cnd.cn_flags & RDONLY), procp, 0); 1464 if (!error) { 1465 nqsrv_getl(vp, ND_WRITE); 1466 tempsize = va.va_size; 1467 VATTR_NULL(&va); 1468 va.va_size = tempsize; 1469 error = VOP_SETATTR(vp, &va, cred, 1470 procp); 1471 } 1472 if (error) 1473 vput(vp); 1474 } 1475 } 1476 if (!error) { 1477 bzero((caddr_t)fhp, sizeof(nfh)); 1478 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; 1479 error = VFS_VPTOFH(vp, &fhp->fh_fid); 1480 if (!error) 1481 error = VOP_GETATTR(vp, &va, cred, procp); 1482 vput(vp); 1483 } 1484 if (v3) { 1485 if (exclusive_flag && !error && 1486 bcmp(cverf, (caddr_t)&va.va_atime, NFSX_V3CREATEVERF)) 1487 error = EEXIST; 1488 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 1489 vrele(dirp); 1490 } 1491 nfsm_reply(NFSX_SRVFH(v3) + NFSX_FATTR(v3) + NFSX_WCCDATA(v3)); 1492 if (v3) { 1493 if (!error) { 1494 nfsm_srvpostop_fh(fhp); 1495 nfsm_srvpostop_attr(0, &va); 1496 } 1497 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1498 } else { 1499 nfsm_srvfhtom(fhp, v3); 1500 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 1501 nfsm_srvfillattr(&va, fp); 1502 } 1503 return (0); 1504 nfsmout: 1505 if (dirp) 1506 vrele(dirp); 1507 if (nd.ni_cnd.cn_nameiop) { 1508 vrele(nd.ni_startdir); 1509 free((caddr_t)nd.ni_cnd.cn_pnbuf, M_NAMEI); 1510 } 1511 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1512 if (nd.ni_dvp == nd.ni_vp) 1513 vrele(nd.ni_dvp); 1514 else 1515 vput(nd.ni_dvp); 1516 if (nd.ni_vp) 1517 vput(nd.ni_vp); 1518 return (error); 1519 } 1520 1521 /* 1522 * nfs v3 mknod service 1523 */ 1524 int 1525 nfsrv_mknod(nfsd, slp, procp, mrq) 1526 struct nfsrv_descript *nfsd; 1527 struct nfssvc_sock *slp; 1528 struct proc *procp; 1529 struct mbuf **mrq; 1530 { 1531 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1532 struct mbuf *nam = nfsd->nd_nam; 1533 caddr_t dpos = nfsd->nd_dpos; 1534 struct ucred *cred = &nfsd->nd_cr; 1535 struct vattr va, dirfor, diraft; 1536 register u_int32_t *tl; 1537 struct nameidata nd; 1538 register int32_t t1; 1539 caddr_t bpos; 1540 int error = 0, cache, len, dirfor_ret = 1, diraft_ret = 1; 1541 u_int32_t major, minor; 1542 enum vtype vtyp; 1543 char *cp2; 1544 struct mbuf *mb, *mb2, *mreq; 1545 struct vnode *vp, *dirp = (struct vnode *)0; 1546 nfsfh_t nfh; 1547 fhandle_t *fhp; 1548 u_quad_t frev; 1549 1550 nd.ni_cnd.cn_nameiop = 0; 1551 fhp = &nfh.fh_generic; 1552 nfsm_srvmtofh(fhp); 1553 nfsm_srvnamesiz(len); 1554 nd.ni_cnd.cn_cred = cred; 1555 nd.ni_cnd.cn_nameiop = CREATE; 1556 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF | SAVESTART; 1557 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 1558 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1559 if (dirp) 1560 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, procp); 1561 if (error) { 1562 nfsm_reply(NFSX_WCCDATA(1)); 1563 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1564 if (dirp) 1565 vrele(dirp); 1566 return (0); 1567 } 1568 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1569 vtyp = nfsv3tov_type(*tl); 1570 if (vtyp != VCHR && vtyp != VBLK && vtyp != VSOCK && vtyp != VFIFO) { 1571 vrele(nd.ni_startdir); 1572 free((caddr_t)nd.ni_cnd.cn_pnbuf, M_NAMEI); 1573 error = NFSERR_BADTYPE; 1574 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1575 vput(nd.ni_dvp); 1576 goto out; 1577 } 1578 VATTR_NULL(&va); 1579 nfsm_srvsattr(&va); 1580 if (vtyp == VCHR || vtyp == VBLK) { 1581 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1582 major = fxdr_unsigned(u_int32_t, *tl++); 1583 minor = fxdr_unsigned(u_int32_t, *tl); 1584 va.va_rdev = makedev(major, minor); 1585 } 1586 1587 /* 1588 * Iff doesn't exist, create it. 1589 */ 1590 if (nd.ni_vp) { 1591 vrele(nd.ni_startdir); 1592 free((caddr_t)nd.ni_cnd.cn_pnbuf, M_NAMEI); 1593 error = EEXIST; 1594 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1595 vput(nd.ni_dvp); 1596 goto out; 1597 } 1598 va.va_type = vtyp; 1599 if (vtyp == VSOCK) { 1600 vrele(nd.ni_startdir); 1601 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1602 error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1603 if (!error) 1604 FREE(nd.ni_cnd.cn_pnbuf, M_NAMEI); 1605 } else { 1606 error = suser(cred, (u_short *)0); 1607 if (error) { 1608 vrele(nd.ni_startdir); 1609 free((caddr_t)nd.ni_cnd.cn_pnbuf, M_NAMEI); 1610 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1611 vput(nd.ni_dvp); 1612 goto out; 1613 } 1614 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1615 error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1616 if (error) { 1617 vrele(nd.ni_startdir); 1618 goto out; 1619 } 1620 nd.ni_cnd.cn_nameiop = LOOKUP; 1621 nd.ni_cnd.cn_flags &= ~(LOCKPARENT | SAVESTART); 1622 nd.ni_cnd.cn_proc = procp; 1623 nd.ni_cnd.cn_cred = procp->p_ucred; 1624 error = lookup(&nd); 1625 FREE(nd.ni_cnd.cn_pnbuf, M_NAMEI); 1626 if (error) 1627 goto out; 1628 if (nd.ni_cnd.cn_flags & ISSYMLINK) { 1629 vrele(nd.ni_dvp); 1630 vput(nd.ni_vp); 1631 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1632 error = EINVAL; 1633 } 1634 } 1635 out: 1636 vp = nd.ni_vp; 1637 if (!error) { 1638 bzero((caddr_t)fhp, sizeof(nfh)); 1639 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; 1640 error = VFS_VPTOFH(vp, &fhp->fh_fid); 1641 if (!error) 1642 error = VOP_GETATTR(vp, &va, cred, procp); 1643 vput(vp); 1644 } 1645 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 1646 vrele(dirp); 1647 nfsm_reply(NFSX_SRVFH(1) + NFSX_POSTOPATTR(1) + NFSX_WCCDATA(1)); 1648 if (!error) { 1649 nfsm_srvpostop_fh(fhp); 1650 nfsm_srvpostop_attr(0, &va); 1651 } 1652 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1653 return (0); 1654 nfsmout: 1655 if (dirp) 1656 vrele(dirp); 1657 if (nd.ni_cnd.cn_nameiop) { 1658 vrele(nd.ni_startdir); 1659 free((caddr_t)nd.ni_cnd.cn_pnbuf, M_NAMEI); 1660 } 1661 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1662 if (nd.ni_dvp == nd.ni_vp) 1663 vrele(nd.ni_dvp); 1664 else 1665 vput(nd.ni_dvp); 1666 if (nd.ni_vp) 1667 vput(nd.ni_vp); 1668 return (error); 1669 } 1670 1671 /* 1672 * nfs remove service 1673 */ 1674 int 1675 nfsrv_remove(nfsd, slp, procp, mrq) 1676 struct nfsrv_descript *nfsd; 1677 struct nfssvc_sock *slp; 1678 struct proc *procp; 1679 struct mbuf **mrq; 1680 { 1681 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1682 struct mbuf *nam = nfsd->nd_nam; 1683 caddr_t dpos = nfsd->nd_dpos; 1684 struct ucred *cred = &nfsd->nd_cr; 1685 struct nameidata nd; 1686 register u_int32_t *tl; 1687 register int32_t t1; 1688 caddr_t bpos; 1689 int error = 0, cache, len, dirfor_ret = 1, diraft_ret = 1; 1690 int v3 = (nfsd->nd_flag & ND_NFSV3); 1691 char *cp2; 1692 struct mbuf *mb, *mreq; 1693 struct vnode *vp, *dirp; 1694 struct vattr dirfor, diraft; 1695 nfsfh_t nfh; 1696 fhandle_t *fhp; 1697 u_quad_t frev; 1698 1699 #ifndef nolint 1700 vp = (struct vnode *)0; 1701 #endif 1702 fhp = &nfh.fh_generic; 1703 nfsm_srvmtofh(fhp); 1704 nfsm_srvnamesiz(len); 1705 nd.ni_cnd.cn_cred = cred; 1706 nd.ni_cnd.cn_nameiop = DELETE; 1707 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 1708 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 1709 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1710 if (dirp) { 1711 if (v3) 1712 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 1713 procp); 1714 else 1715 vrele(dirp); 1716 } 1717 if (!error) { 1718 vp = nd.ni_vp; 1719 if (vp->v_type == VDIR && 1720 (error = suser(cred, (u_short *)0)) != 0) 1721 goto out; 1722 /* 1723 * The root of a mounted filesystem cannot be deleted. 1724 */ 1725 if (vp->v_flag & VROOT) { 1726 error = EBUSY; 1727 goto out; 1728 } 1729 out: 1730 if (!error) { 1731 #if defined(UVM) 1732 (void)uvm_vnp_uncache(vp); 1733 #else 1734 (void)vnode_pager_uncache(vp); 1735 #endif 1736 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1737 nqsrv_getl(vp, ND_WRITE); 1738 error = VOP_REMOVE(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); 1739 } else { 1740 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1741 if (nd.ni_dvp == vp) 1742 vrele(nd.ni_dvp); 1743 else 1744 vput(nd.ni_dvp); 1745 vput(vp); 1746 } 1747 } 1748 if (dirp && v3) { 1749 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 1750 vrele(dirp); 1751 } 1752 nfsm_reply(NFSX_WCCDATA(v3)); 1753 if (v3) { 1754 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1755 return (0); 1756 } 1757 nfsm_srvdone; 1758 } 1759 1760 /* 1761 * nfs rename service 1762 */ 1763 int 1764 nfsrv_rename(nfsd, slp, procp, mrq) 1765 struct nfsrv_descript *nfsd; 1766 struct nfssvc_sock *slp; 1767 struct proc *procp; 1768 struct mbuf **mrq; 1769 { 1770 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1771 struct mbuf *nam = nfsd->nd_nam; 1772 caddr_t dpos = nfsd->nd_dpos; 1773 struct ucred *cred = &nfsd->nd_cr; 1774 register u_int32_t *tl; 1775 register int32_t t1; 1776 caddr_t bpos; 1777 int error = 0, cache, len, len2, fdirfor_ret = 1, fdiraft_ret = 1; 1778 int tdirfor_ret = 1, tdiraft_ret = 1; 1779 int v3 = (nfsd->nd_flag & ND_NFSV3); 1780 char *cp2; 1781 struct mbuf *mb, *mreq; 1782 struct nameidata fromnd, tond; 1783 struct vnode *fvp, *tvp, *tdvp, *fdirp = (struct vnode *)0; 1784 struct vnode *tdirp = (struct vnode *)0; 1785 struct vattr fdirfor, fdiraft, tdirfor, tdiraft; 1786 nfsfh_t fnfh, tnfh; 1787 fhandle_t *ffhp, *tfhp; 1788 u_quad_t frev; 1789 uid_t saved_uid; 1790 1791 #ifndef nolint 1792 fvp = (struct vnode *)0; 1793 #endif 1794 ffhp = &fnfh.fh_generic; 1795 tfhp = &tnfh.fh_generic; 1796 fromnd.ni_cnd.cn_nameiop = 0; 1797 tond.ni_cnd.cn_nameiop = 0; 1798 nfsm_srvmtofh(ffhp); 1799 nfsm_srvnamesiz(len); 1800 /* 1801 * Remember our original uid so that we can reset cr_uid before 1802 * the second nfs_namei() call, in case it is remapped. 1803 */ 1804 saved_uid = cred->cr_uid; 1805 fromnd.ni_cnd.cn_cred = cred; 1806 fromnd.ni_cnd.cn_nameiop = DELETE; 1807 fromnd.ni_cnd.cn_flags = WANTPARENT | SAVESTART; 1808 error = nfs_namei(&fromnd, ffhp, len, slp, nam, &md, 1809 &dpos, &fdirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1810 if (fdirp) { 1811 if (v3) 1812 fdirfor_ret = VOP_GETATTR(fdirp, &fdirfor, cred, 1813 procp); 1814 else { 1815 vrele(fdirp); 1816 fdirp = (struct vnode *)0; 1817 } 1818 } 1819 if (error) { 1820 nfsm_reply(2 * NFSX_WCCDATA(v3)); 1821 nfsm_srvwcc_data(fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft); 1822 nfsm_srvwcc_data(tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft); 1823 if (fdirp) 1824 vrele(fdirp); 1825 return (0); 1826 } 1827 fvp = fromnd.ni_vp; 1828 nfsm_srvmtofh(tfhp); 1829 nfsm_strsiz(len2, NFS_MAXNAMLEN); 1830 cred->cr_uid = saved_uid; 1831 tond.ni_cnd.cn_cred = cred; 1832 tond.ni_cnd.cn_nameiop = RENAME; 1833 tond.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF | NOCACHE | SAVESTART; 1834 error = nfs_namei(&tond, tfhp, len2, slp, nam, &md, 1835 &dpos, &tdirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1836 if (tdirp) { 1837 if (v3) 1838 tdirfor_ret = VOP_GETATTR(tdirp, &tdirfor, cred, 1839 procp); 1840 else { 1841 vrele(tdirp); 1842 tdirp = (struct vnode *)0; 1843 } 1844 } 1845 if (error) { 1846 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 1847 vrele(fromnd.ni_dvp); 1848 vrele(fvp); 1849 goto out1; 1850 } 1851 tdvp = tond.ni_dvp; 1852 tvp = tond.ni_vp; 1853 if (tvp != NULL) { 1854 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 1855 if (v3) 1856 error = EEXIST; 1857 else 1858 error = EISDIR; 1859 goto out; 1860 } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 1861 if (v3) 1862 error = EEXIST; 1863 else 1864 error = ENOTDIR; 1865 goto out; 1866 } 1867 if (tvp->v_type == VDIR && tvp->v_mountedhere) { 1868 if (v3) 1869 error = EXDEV; 1870 else 1871 error = ENOTEMPTY; 1872 goto out; 1873 } 1874 } 1875 if (fvp->v_type == VDIR && fvp->v_mountedhere) { 1876 if (v3) 1877 error = EXDEV; 1878 else 1879 error = ENOTEMPTY; 1880 goto out; 1881 } 1882 if (fvp->v_mount != tdvp->v_mount) { 1883 if (v3) 1884 error = EXDEV; 1885 else 1886 error = ENOTEMPTY; 1887 goto out; 1888 } 1889 if (fvp == tdvp) 1890 if (v3) 1891 error = EINVAL; 1892 else 1893 error = ENOTEMPTY; 1894 /* 1895 * If source is the same as the destination (that is the 1896 * same vnode with the same name in the same directory), 1897 * then there is nothing to do. 1898 */ 1899 if (fvp == tvp && fromnd.ni_dvp == tdvp && 1900 fromnd.ni_cnd.cn_namelen == tond.ni_cnd.cn_namelen && 1901 !bcmp(fromnd.ni_cnd.cn_nameptr, tond.ni_cnd.cn_nameptr, 1902 fromnd.ni_cnd.cn_namelen)) 1903 error = -1; 1904 out: 1905 if (!error) { 1906 nqsrv_getl(fromnd.ni_dvp, ND_WRITE); 1907 nqsrv_getl(tdvp, ND_WRITE); 1908 if (tvp) { 1909 #if defined(UVM) 1910 (void)uvm_vnp_uncache(tvp); 1911 #else 1912 (void)vnode_pager_uncache(tvp); 1913 #endif 1914 nqsrv_getl(tvp, ND_WRITE); 1915 } 1916 error = VOP_RENAME(fromnd.ni_dvp, fromnd.ni_vp, &fromnd.ni_cnd, 1917 tond.ni_dvp, tond.ni_vp, &tond.ni_cnd); 1918 } else { 1919 VOP_ABORTOP(tond.ni_dvp, &tond.ni_cnd); 1920 if (tdvp == tvp) 1921 vrele(tdvp); 1922 else 1923 vput(tdvp); 1924 if (tvp) 1925 vput(tvp); 1926 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 1927 vrele(fromnd.ni_dvp); 1928 vrele(fvp); 1929 if (error == -1) 1930 error = 0; 1931 } 1932 vrele(tond.ni_startdir); 1933 FREE(tond.ni_cnd.cn_pnbuf, M_NAMEI); 1934 out1: 1935 if (fdirp) { 1936 fdiraft_ret = VOP_GETATTR(fdirp, &fdiraft, cred, procp); 1937 vrele(fdirp); 1938 } 1939 if (tdirp) { 1940 tdiraft_ret = VOP_GETATTR(tdirp, &tdiraft, cred, procp); 1941 vrele(tdirp); 1942 } 1943 vrele(fromnd.ni_startdir); 1944 FREE(fromnd.ni_cnd.cn_pnbuf, M_NAMEI); 1945 nfsm_reply(2 * NFSX_WCCDATA(v3)); 1946 if (v3) { 1947 nfsm_srvwcc_data(fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft); 1948 nfsm_srvwcc_data(tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft); 1949 } 1950 return (0); 1951 1952 nfsmout: 1953 if (fdirp) 1954 vrele(fdirp); 1955 if (tdirp) 1956 vrele(tdirp); 1957 if (tond.ni_cnd.cn_nameiop) { 1958 vrele(tond.ni_startdir); 1959 FREE(tond.ni_cnd.cn_pnbuf, M_NAMEI); 1960 } 1961 if (fromnd.ni_cnd.cn_nameiop) { 1962 vrele(fromnd.ni_startdir); 1963 FREE(fromnd.ni_cnd.cn_pnbuf, M_NAMEI); 1964 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 1965 vrele(fromnd.ni_dvp); 1966 vrele(fvp); 1967 } 1968 return (error); 1969 } 1970 1971 /* 1972 * nfs link service 1973 */ 1974 int 1975 nfsrv_link(nfsd, slp, procp, mrq) 1976 struct nfsrv_descript *nfsd; 1977 struct nfssvc_sock *slp; 1978 struct proc *procp; 1979 struct mbuf **mrq; 1980 { 1981 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1982 struct mbuf *nam = nfsd->nd_nam; 1983 caddr_t dpos = nfsd->nd_dpos; 1984 struct ucred *cred = &nfsd->nd_cr; 1985 struct nameidata nd; 1986 register u_int32_t *tl; 1987 register int32_t t1; 1988 caddr_t bpos; 1989 int error = 0, rdonly, cache, len, dirfor_ret = 1, diraft_ret = 1; 1990 int getret = 1, v3 = (nfsd->nd_flag & ND_NFSV3); 1991 char *cp2; 1992 struct mbuf *mb, *mreq; 1993 struct vnode *vp, *xp, *dirp = (struct vnode *)0; 1994 struct vattr dirfor, diraft, at; 1995 nfsfh_t nfh, dnfh; 1996 fhandle_t *fhp, *dfhp; 1997 u_quad_t frev; 1998 1999 fhp = &nfh.fh_generic; 2000 dfhp = &dnfh.fh_generic; 2001 nfsm_srvmtofh(fhp); 2002 nfsm_srvmtofh(dfhp); 2003 nfsm_srvnamesiz(len); 2004 error = nfsrv_fhtovp(fhp, FALSE, &vp, cred, slp, nam, 2005 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2006 if (error) { 2007 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2008 nfsm_srvpostop_attr(getret, &at); 2009 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2010 return (0); 2011 } 2012 if (vp->v_type == VDIR && (error = suser(cred, (u_short *)0)) != 0) 2013 goto out1; 2014 nd.ni_cnd.cn_cred = cred; 2015 nd.ni_cnd.cn_nameiop = CREATE; 2016 nd.ni_cnd.cn_flags = LOCKPARENT; 2017 error = nfs_namei(&nd, dfhp, len, slp, nam, &md, &dpos, 2018 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2019 if (dirp) { 2020 if (v3) 2021 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 2022 procp); 2023 else { 2024 vrele(dirp); 2025 dirp = (struct vnode *)0; 2026 } 2027 } 2028 if (error) 2029 goto out1; 2030 xp = nd.ni_vp; 2031 if (xp != NULL) { 2032 error = EEXIST; 2033 goto out; 2034 } 2035 xp = nd.ni_dvp; 2036 if (vp->v_mount != xp->v_mount) 2037 error = EXDEV; 2038 out: 2039 if (!error) { 2040 nqsrv_getl(vp, ND_WRITE); 2041 nqsrv_getl(xp, ND_WRITE); 2042 error = VOP_LINK(nd.ni_dvp, vp, &nd.ni_cnd); 2043 } else { 2044 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2045 if (nd.ni_dvp == nd.ni_vp) 2046 vrele(nd.ni_dvp); 2047 else 2048 vput(nd.ni_dvp); 2049 if (nd.ni_vp) 2050 vrele(nd.ni_vp); 2051 } 2052 out1: 2053 if (v3) 2054 getret = VOP_GETATTR(vp, &at, cred, procp); 2055 if (dirp) { 2056 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 2057 vrele(dirp); 2058 } 2059 vrele(vp); 2060 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2061 if (v3) { 2062 nfsm_srvpostop_attr(getret, &at); 2063 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2064 return (0); 2065 } 2066 nfsm_srvdone; 2067 } 2068 2069 /* 2070 * nfs symbolic link service 2071 */ 2072 int 2073 nfsrv_symlink(nfsd, slp, procp, mrq) 2074 struct nfsrv_descript *nfsd; 2075 struct nfssvc_sock *slp; 2076 struct proc *procp; 2077 struct mbuf **mrq; 2078 { 2079 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2080 struct mbuf *nam = nfsd->nd_nam; 2081 caddr_t dpos = nfsd->nd_dpos; 2082 struct ucred *cred = &nfsd->nd_cr; 2083 struct vattr va, dirfor, diraft; 2084 struct nameidata nd; 2085 register u_int32_t *tl; 2086 register int32_t t1; 2087 struct nfsv2_sattr *sp; 2088 char *bpos, *pathcp = NULL, *cp2; 2089 struct uio io; 2090 struct iovec iv; 2091 int error = 0, cache, len, len2, dirfor_ret = 1, diraft_ret = 1; 2092 int v3 = (nfsd->nd_flag & ND_NFSV3); 2093 struct mbuf *mb, *mreq, *mb2; 2094 struct vnode *dirp = (struct vnode *)0; 2095 nfsfh_t nfh; 2096 fhandle_t *fhp; 2097 u_quad_t frev; 2098 2099 nd.ni_cnd.cn_nameiop = 0; 2100 fhp = &nfh.fh_generic; 2101 nfsm_srvmtofh(fhp); 2102 nfsm_srvnamesiz(len); 2103 nd.ni_cnd.cn_cred = cred; 2104 nd.ni_cnd.cn_nameiop = CREATE; 2105 nd.ni_cnd.cn_flags = LOCKPARENT | SAVESTART; 2106 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 2107 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2108 if (dirp) { 2109 if (v3) 2110 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 2111 procp); 2112 else { 2113 vrele(dirp); 2114 dirp = (struct vnode *)0; 2115 } 2116 } 2117 if (error) 2118 goto out; 2119 VATTR_NULL(&va); 2120 if (v3) 2121 nfsm_srvsattr(&va); 2122 nfsm_strsiz(len2, NFS_MAXPATHLEN); 2123 MALLOC(pathcp, caddr_t, len2 + 1, M_TEMP, M_WAITOK); 2124 iv.iov_base = pathcp; 2125 iv.iov_len = len2; 2126 io.uio_resid = len2; 2127 io.uio_offset = 0; 2128 io.uio_iov = &iv; 2129 io.uio_iovcnt = 1; 2130 io.uio_segflg = UIO_SYSSPACE; 2131 io.uio_rw = UIO_READ; 2132 io.uio_procp = (struct proc *)0; 2133 nfsm_mtouio(&io, len2); 2134 if (!v3) { 2135 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2136 va.va_mode = fxdr_unsigned(u_int16_t, sp->sa_mode); 2137 } 2138 *(pathcp + len2) = '\0'; 2139 if (nd.ni_vp) { 2140 vrele(nd.ni_startdir); 2141 free(nd.ni_cnd.cn_pnbuf, M_NAMEI); 2142 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2143 if (nd.ni_dvp == nd.ni_vp) 2144 vrele(nd.ni_dvp); 2145 else 2146 vput(nd.ni_dvp); 2147 vrele(nd.ni_vp); 2148 error = EEXIST; 2149 goto out; 2150 } 2151 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2152 error = VOP_SYMLINK(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va, pathcp); 2153 if (error) 2154 vrele(nd.ni_startdir); 2155 else { 2156 if (v3) { 2157 nd.ni_cnd.cn_nameiop = LOOKUP; 2158 nd.ni_cnd.cn_flags &= ~(LOCKPARENT | SAVESTART | FOLLOW); 2159 nd.ni_cnd.cn_flags |= (NOFOLLOW | LOCKLEAF); 2160 nd.ni_cnd.cn_proc = procp; 2161 nd.ni_cnd.cn_cred = cred; 2162 error = lookup(&nd); 2163 if (!error) { 2164 bzero((caddr_t)fhp, sizeof(nfh)); 2165 fhp->fh_fsid = nd.ni_vp->v_mount->mnt_stat.f_fsid; 2166 error = VFS_VPTOFH(nd.ni_vp, &fhp->fh_fid); 2167 if (!error) 2168 error = VOP_GETATTR(nd.ni_vp, &va, cred, 2169 procp); 2170 vput(nd.ni_vp); 2171 } 2172 } else 2173 vrele(nd.ni_startdir); 2174 FREE(nd.ni_cnd.cn_pnbuf, M_NAMEI); 2175 } 2176 out: 2177 if (pathcp) 2178 FREE(pathcp, M_TEMP); 2179 if (dirp) { 2180 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 2181 vrele(dirp); 2182 } 2183 nfsm_reply(NFSX_SRVFH(v3) + NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2184 if (v3) { 2185 if (!error) { 2186 nfsm_srvpostop_fh(fhp); 2187 nfsm_srvpostop_attr(0, &va); 2188 } 2189 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2190 } 2191 return (0); 2192 nfsmout: 2193 if (nd.ni_cnd.cn_nameiop) { 2194 vrele(nd.ni_startdir); 2195 free(nd.ni_cnd.cn_pnbuf, M_NAMEI); 2196 } 2197 if (dirp) 2198 vrele(dirp); 2199 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2200 if (nd.ni_dvp == nd.ni_vp) 2201 vrele(nd.ni_dvp); 2202 else 2203 vput(nd.ni_dvp); 2204 if (nd.ni_vp) 2205 vrele(nd.ni_vp); 2206 if (pathcp) 2207 FREE(pathcp, M_TEMP); 2208 return (error); 2209 } 2210 2211 /* 2212 * nfs mkdir service 2213 */ 2214 int 2215 nfsrv_mkdir(nfsd, slp, procp, mrq) 2216 struct nfsrv_descript *nfsd; 2217 struct nfssvc_sock *slp; 2218 struct proc *procp; 2219 struct mbuf **mrq; 2220 { 2221 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2222 struct mbuf *nam = nfsd->nd_nam; 2223 caddr_t dpos = nfsd->nd_dpos; 2224 struct ucred *cred = &nfsd->nd_cr; 2225 struct vattr va, dirfor, diraft; 2226 register struct nfs_fattr *fp; 2227 struct nameidata nd; 2228 register caddr_t cp; 2229 register u_int32_t *tl; 2230 register int32_t t1; 2231 caddr_t bpos; 2232 int error = 0, cache, len, dirfor_ret = 1, diraft_ret = 1; 2233 int v3 = (nfsd->nd_flag & ND_NFSV3); 2234 char *cp2; 2235 struct mbuf *mb, *mb2, *mreq; 2236 struct vnode *vp, *dirp = (struct vnode *)0; 2237 nfsfh_t nfh; 2238 fhandle_t *fhp; 2239 u_quad_t frev; 2240 2241 fhp = &nfh.fh_generic; 2242 nfsm_srvmtofh(fhp); 2243 nfsm_srvnamesiz(len); 2244 nd.ni_cnd.cn_cred = cred; 2245 nd.ni_cnd.cn_nameiop = CREATE; 2246 nd.ni_cnd.cn_flags = LOCKPARENT; 2247 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 2248 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2249 if (dirp) { 2250 if (v3) 2251 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 2252 procp); 2253 else { 2254 vrele(dirp); 2255 dirp = (struct vnode *)0; 2256 } 2257 } 2258 if (error) { 2259 nfsm_reply(NFSX_WCCDATA(v3)); 2260 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2261 if (dirp) 2262 vrele(dirp); 2263 return (0); 2264 } 2265 VATTR_NULL(&va); 2266 if (v3) { 2267 nfsm_srvsattr(&va); 2268 } else { 2269 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2270 va.va_mode = nfstov_mode(*tl++); 2271 } 2272 va.va_type = VDIR; 2273 vp = nd.ni_vp; 2274 if (vp != NULL) { 2275 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2276 if (nd.ni_dvp == vp) 2277 vrele(nd.ni_dvp); 2278 else 2279 vput(nd.ni_dvp); 2280 vrele(vp); 2281 error = EEXIST; 2282 goto out; 2283 } 2284 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2285 error = VOP_MKDIR(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 2286 if (!error) { 2287 vp = nd.ni_vp; 2288 bzero((caddr_t)fhp, sizeof(nfh)); 2289 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; 2290 error = VFS_VPTOFH(vp, &fhp->fh_fid); 2291 if (!error) 2292 error = VOP_GETATTR(vp, &va, cred, procp); 2293 vput(vp); 2294 } 2295 out: 2296 if (dirp) { 2297 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 2298 vrele(dirp); 2299 } 2300 nfsm_reply(NFSX_SRVFH(v3) + NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2301 if (v3) { 2302 if (!error) { 2303 nfsm_srvpostop_fh(fhp); 2304 nfsm_srvpostop_attr(0, &va); 2305 } 2306 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2307 } else { 2308 nfsm_srvfhtom(fhp, v3); 2309 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 2310 nfsm_srvfillattr(&va, fp); 2311 } 2312 return (0); 2313 nfsmout: 2314 if (dirp) 2315 vrele(dirp); 2316 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2317 if (nd.ni_dvp == nd.ni_vp) 2318 vrele(nd.ni_dvp); 2319 else 2320 vput(nd.ni_dvp); 2321 if (nd.ni_vp) 2322 vrele(nd.ni_vp); 2323 return (error); 2324 } 2325 2326 /* 2327 * nfs rmdir service 2328 */ 2329 int 2330 nfsrv_rmdir(nfsd, slp, procp, mrq) 2331 struct nfsrv_descript *nfsd; 2332 struct nfssvc_sock *slp; 2333 struct proc *procp; 2334 struct mbuf **mrq; 2335 { 2336 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2337 struct mbuf *nam = nfsd->nd_nam; 2338 caddr_t dpos = nfsd->nd_dpos; 2339 struct ucred *cred = &nfsd->nd_cr; 2340 register u_int32_t *tl; 2341 register int32_t t1; 2342 caddr_t bpos; 2343 int error = 0, cache, len, dirfor_ret = 1, diraft_ret = 1; 2344 int v3 = (nfsd->nd_flag & ND_NFSV3); 2345 char *cp2; 2346 struct mbuf *mb, *mreq; 2347 struct vnode *vp, *dirp = (struct vnode *)0; 2348 struct vattr dirfor, diraft; 2349 nfsfh_t nfh; 2350 fhandle_t *fhp; 2351 struct nameidata nd; 2352 u_quad_t frev; 2353 2354 fhp = &nfh.fh_generic; 2355 nfsm_srvmtofh(fhp); 2356 nfsm_srvnamesiz(len); 2357 nd.ni_cnd.cn_cred = cred; 2358 nd.ni_cnd.cn_nameiop = DELETE; 2359 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 2360 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 2361 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2362 if (dirp) { 2363 if (v3) 2364 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 2365 procp); 2366 else { 2367 vrele(dirp); 2368 dirp = (struct vnode *)0; 2369 } 2370 } 2371 if (error) { 2372 nfsm_reply(NFSX_WCCDATA(v3)); 2373 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2374 if (dirp) 2375 vrele(dirp); 2376 return (0); 2377 } 2378 vp = nd.ni_vp; 2379 if (vp->v_type != VDIR) { 2380 error = ENOTDIR; 2381 goto out; 2382 } 2383 /* 2384 * No rmdir "." please. 2385 */ 2386 if (nd.ni_dvp == vp) { 2387 error = EINVAL; 2388 goto out; 2389 } 2390 /* 2391 * The root of a mounted filesystem cannot be deleted. 2392 */ 2393 if (vp->v_flag & VROOT) 2394 error = EBUSY; 2395 out: 2396 if (!error) { 2397 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2398 nqsrv_getl(vp, ND_WRITE); 2399 error = VOP_RMDIR(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); 2400 } else { 2401 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2402 if (nd.ni_dvp == nd.ni_vp) 2403 vrele(nd.ni_dvp); 2404 else 2405 vput(nd.ni_dvp); 2406 vput(vp); 2407 } 2408 if (dirp) { 2409 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 2410 vrele(dirp); 2411 } 2412 nfsm_reply(NFSX_WCCDATA(v3)); 2413 if (v3) { 2414 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2415 return (0); 2416 } 2417 nfsm_srvdone; 2418 } 2419 2420 /* 2421 * nfs readdir service 2422 * - mallocs what it thinks is enough to read 2423 * count rounded up to a multiple of NFS_DIRBLKSIZ <= NFS_MAXREADDIR 2424 * - calls VOP_READDIR() 2425 * - loops around building the reply 2426 * if the output generated exceeds count break out of loop 2427 * The nfsm_clget macro is used here so that the reply will be packed 2428 * tightly in mbuf clusters. 2429 * - it only knows that it has encountered eof when the VOP_READDIR() 2430 * reads nothing 2431 * - as such one readdir rpc will return eof false although you are there 2432 * and then the next will return eof 2433 * - it trims out records with d_fileno == 0 2434 * this doesn't matter for Unix clients, but they might confuse clients 2435 * for other os'. 2436 * - it trims out records with d_type == DT_WHT 2437 * these cannot be seen through NFS (unless we extend the protocol) 2438 * NB: It is tempting to set eof to true if the VOP_READDIR() reads less 2439 * than requested, but this may not apply to all filesystems. For 2440 * example, client NFS does not { although it is never remote mounted 2441 * anyhow } 2442 * The alternate call nfsrv_readdirplus() does lookups as well. 2443 * PS: The NFS protocol spec. does not clarify what the "count" byte 2444 * argument is a count of.. just name strings and file id's or the 2445 * entire reply rpc or ... 2446 * I tried just file name and id sizes and it confused the Sun client, 2447 * so I am using the full rpc size now. The "paranoia.." comment refers 2448 * to including the status longwords that are not a part of the dir. 2449 * "entry" structures, but are in the rpc. 2450 */ 2451 struct flrep { 2452 nfsuint64 fl_off; 2453 u_int32_t fl_postopok; 2454 u_int32_t fl_fattr[NFSX_V3FATTR / sizeof (u_int32_t)]; 2455 u_int32_t fl_fhok; 2456 u_int32_t fl_fhsize; 2457 u_int32_t fl_nfh[NFSX_V3FH / sizeof (u_int32_t)]; 2458 }; 2459 2460 int 2461 nfsrv_readdir(nfsd, slp, procp, mrq) 2462 struct nfsrv_descript *nfsd; 2463 struct nfssvc_sock *slp; 2464 struct proc *procp; 2465 struct mbuf **mrq; 2466 { 2467 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2468 struct mbuf *nam = nfsd->nd_nam; 2469 caddr_t dpos = nfsd->nd_dpos; 2470 struct ucred *cred = &nfsd->nd_cr; 2471 register char *bp, *be; 2472 register struct mbuf *mp; 2473 register struct dirent *dp; 2474 register caddr_t cp; 2475 register u_int32_t *tl; 2476 register int32_t t1; 2477 caddr_t bpos; 2478 struct mbuf *mb, *mb2, *mreq, *mp2; 2479 char *cpos, *cend, *cp2, *rbuf; 2480 struct vnode *vp; 2481 struct vattr at; 2482 nfsfh_t nfh; 2483 fhandle_t *fhp; 2484 struct uio io; 2485 struct iovec iv; 2486 int len, nlen, rem, xfer, tsiz, i, error = 0, getret = 1; 2487 int siz, cnt, fullsiz, eofflag, rdonly, cache, ncookies; 2488 int v3 = (nfsd->nd_flag & ND_NFSV3); 2489 u_quad_t frev, off, toff, verf; 2490 off_t *cookies = NULL, *cookiep; 2491 nfsuint64 jar; 2492 2493 fhp = &nfh.fh_generic; 2494 nfsm_srvmtofh(fhp); 2495 if (v3) { 2496 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 2497 fxdr_hyper(tl, &toff); 2498 tl += 2; 2499 fxdr_hyper(tl, &verf); 2500 tl += 2; 2501 } else { 2502 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2503 toff = fxdr_unsigned(u_quad_t, *tl++); 2504 } 2505 off = toff; 2506 cnt = fxdr_unsigned(int, *tl); 2507 siz = ((cnt + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1)); 2508 xfer = NFS_SRVMAXDATA(nfsd); 2509 if (siz > xfer) 2510 siz = xfer; 2511 fullsiz = siz; 2512 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 2513 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2514 if (!error && vp->v_type != VDIR) { 2515 error = ENOTDIR; 2516 vput(vp); 2517 } 2518 if (error) { 2519 nfsm_reply(NFSX_UNSIGNED); 2520 nfsm_srvpostop_attr(getret, &at); 2521 return (0); 2522 } 2523 nqsrv_getl(vp, ND_READ); 2524 if (v3) { 2525 error = getret = VOP_GETATTR(vp, &at, cred, procp); 2526 #ifdef NFS3_STRICTVERF 2527 /* 2528 * XXX This check is too strict for Solaris 2.5 clients. 2529 */ 2530 if (!error && toff && verf != at.va_filerev) 2531 error = NFSERR_BAD_COOKIE; 2532 #endif 2533 } 2534 if (!error) 2535 error = nfsrv_access(vp, VEXEC, cred, rdonly, procp, 0); 2536 if (error) { 2537 vput(vp); 2538 nfsm_reply(NFSX_POSTOPATTR(v3)); 2539 nfsm_srvpostop_attr(getret, &at); 2540 return (0); 2541 } 2542 #ifdef Lite2_integrated 2543 VOP_UNLOCK(vp, 0, procp); 2544 #else 2545 VOP_UNLOCK(vp); 2546 #endif 2547 MALLOC(rbuf, caddr_t, siz, M_TEMP, M_WAITOK); 2548 ncookies = siz / (5 * NFSX_UNSIGNED); /*7 for V3, but it's an est. so*/ 2549 MALLOC(cookies, off_t *, ncookies * sizeof (off_t), M_TEMP, 2550 M_WAITOK); 2551 again: 2552 iv.iov_base = rbuf; 2553 iv.iov_len = fullsiz; 2554 io.uio_iov = &iv; 2555 io.uio_iovcnt = 1; 2556 io.uio_offset = (off_t)off; 2557 io.uio_resid = fullsiz; 2558 io.uio_segflg = UIO_SYSSPACE; 2559 io.uio_rw = UIO_READ; 2560 io.uio_procp = (struct proc *)0; 2561 eofflag = 0; 2562 #ifdef Lite2_integrated 2563 VOP_LOCK(vp, 0, procp); 2564 #else 2565 VOP_LOCK(vp); 2566 #endif 2567 2568 error = VOP_READDIR(vp, &io, cred, &eofflag, cookies, ncookies); 2569 2570 off = (off_t)io.uio_offset; 2571 if (!cookies && !error) 2572 error = NFSERR_PERM; 2573 if (v3) { 2574 getret = VOP_GETATTR(vp, &at, cred, procp); 2575 if (!error) 2576 error = getret; 2577 } 2578 2579 #ifdef Lite2_integrated 2580 VOP_UNLOCK(vp, 0, procp); 2581 #else 2582 VOP_UNLOCK(vp); 2583 #endif 2584 if (error) { 2585 vrele(vp); 2586 free((caddr_t)rbuf, M_TEMP); 2587 if (cookies) 2588 free((caddr_t)cookies, M_TEMP); 2589 nfsm_reply(NFSX_POSTOPATTR(v3)); 2590 nfsm_srvpostop_attr(getret, &at); 2591 return (0); 2592 } 2593 if (io.uio_resid) { 2594 siz -= io.uio_resid; 2595 2596 /* 2597 * If nothing read, return eof 2598 * rpc reply 2599 */ 2600 if (siz == 0) { 2601 vrele(vp); 2602 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_COOKIEVERF(v3) + 2603 2 * NFSX_UNSIGNED); 2604 if (v3) { 2605 nfsm_srvpostop_attr(getret, &at); 2606 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 2607 txdr_hyper(&at.va_filerev, tl); 2608 tl += 2; 2609 } else 2610 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2611 *tl++ = nfs_false; 2612 *tl = nfs_true; 2613 FREE((caddr_t)rbuf, M_TEMP); 2614 FREE((caddr_t)cookies, M_TEMP); 2615 return (0); 2616 } 2617 } 2618 2619 /* 2620 * Check for degenerate cases of nothing useful read. 2621 * If so go try again 2622 */ 2623 cpos = rbuf; 2624 cend = rbuf + siz; 2625 dp = (struct dirent *)cpos; 2626 cookiep = cookies; 2627 2628 while (cpos < cend && ncookies > 0 && 2629 (dp->d_fileno == 0 || dp->d_type == DT_WHT)) { 2630 cpos += dp->d_reclen; 2631 dp = (struct dirent *)cpos; 2632 cookiep++; 2633 ncookies--; 2634 } 2635 if (cpos >= cend || ncookies == 0) { 2636 toff = off; 2637 siz = fullsiz; 2638 goto again; 2639 } 2640 2641 len = 3 * NFSX_UNSIGNED; /* paranoia, probably can be 0 */ 2642 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_COOKIEVERF(v3) + siz); 2643 if (v3) { 2644 nfsm_srvpostop_attr(getret, &at); 2645 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2646 txdr_hyper(&at.va_filerev, tl); 2647 } 2648 mp = mp2 = mb; 2649 bp = bpos; 2650 be = bp + M_TRAILINGSPACE(mp); 2651 2652 /* Loop through the records and build reply */ 2653 while (cpos < cend && ncookies > 0) { 2654 if (dp->d_fileno != 0 && dp->d_type != DT_WHT) { 2655 nlen = dp->d_namlen; 2656 rem = nfsm_rndup(nlen)-nlen; 2657 len += (4 * NFSX_UNSIGNED + nlen + rem); 2658 if (v3) 2659 len += 2 * NFSX_UNSIGNED; 2660 if (len > cnt) { 2661 eofflag = 0; 2662 break; 2663 } 2664 /* 2665 * Build the directory record xdr from 2666 * the dirent entry. 2667 */ 2668 nfsm_clget; 2669 *tl = nfs_true; 2670 bp += NFSX_UNSIGNED; 2671 if (v3) { 2672 nfsm_clget; 2673 *tl = 0; 2674 bp += NFSX_UNSIGNED; 2675 } 2676 nfsm_clget; 2677 *tl = txdr_unsigned(dp->d_fileno); 2678 bp += NFSX_UNSIGNED; 2679 nfsm_clget; 2680 *tl = txdr_unsigned(nlen); 2681 bp += NFSX_UNSIGNED; 2682 2683 /* And loop around copying the name */ 2684 xfer = nlen; 2685 cp = dp->d_name; 2686 while (xfer > 0) { 2687 nfsm_clget; 2688 if ((bp+xfer) > be) 2689 tsiz = be-bp; 2690 else 2691 tsiz = xfer; 2692 bcopy(cp, bp, tsiz); 2693 bp += tsiz; 2694 xfer -= tsiz; 2695 if (xfer > 0) 2696 cp += tsiz; 2697 } 2698 /* And null pad to an int32_t boundary */ 2699 for (i = 0; i < rem; i++) 2700 *bp++ = '\0'; 2701 nfsm_clget; 2702 2703 /* Finish off the record */ 2704 txdr_hyper(cookiep, &jar); 2705 if (v3) { 2706 *tl = jar.nfsuquad[0]; 2707 bp += NFSX_UNSIGNED; 2708 nfsm_clget; 2709 } 2710 *tl = jar.nfsuquad[1]; 2711 bp += NFSX_UNSIGNED; 2712 } 2713 cpos += dp->d_reclen; 2714 dp = (struct dirent *)cpos; 2715 cookiep++; 2716 ncookies--; 2717 } 2718 vrele(vp); 2719 nfsm_clget; 2720 *tl = nfs_false; 2721 bp += NFSX_UNSIGNED; 2722 nfsm_clget; 2723 if (eofflag) 2724 *tl = nfs_true; 2725 else 2726 *tl = nfs_false; 2727 bp += NFSX_UNSIGNED; 2728 if (mp != mb) { 2729 if (bp < be) 2730 mp->m_len = bp - mtod(mp, caddr_t); 2731 } else 2732 mp->m_len += bp - bpos; 2733 FREE((caddr_t)rbuf, M_TEMP); 2734 FREE((caddr_t)cookies, M_TEMP); 2735 nfsm_srvdone; 2736 } 2737 2738 int 2739 nfsrv_readdirplus(nfsd, slp, procp, mrq) 2740 struct nfsrv_descript *nfsd; 2741 struct nfssvc_sock *slp; 2742 struct proc *procp; 2743 struct mbuf **mrq; 2744 { 2745 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2746 struct mbuf *nam = nfsd->nd_nam; 2747 caddr_t dpos = nfsd->nd_dpos; 2748 struct ucred *cred = &nfsd->nd_cr; 2749 register char *bp, *be; 2750 register struct mbuf *mp; 2751 register struct dirent *dp; 2752 register caddr_t cp; 2753 register u_int32_t *tl; 2754 register int32_t t1; 2755 caddr_t bpos; 2756 struct mbuf *mb, *mb2, *mreq, *mp2; 2757 char *cpos, *cend, *cp2, *rbuf; 2758 struct vnode *vp, *nvp; 2759 struct flrep fl; 2760 nfsfh_t nfh; 2761 fhandle_t *fhp, *nfhp = (fhandle_t *)fl.fl_nfh; 2762 struct uio io; 2763 struct iovec iv; 2764 struct vattr va, at, *vap = &va; 2765 struct nfs_fattr *fp; 2766 int len, nlen, rem, xfer, tsiz, i, error = 0, getret = 1; 2767 int siz, cnt, fullsiz, eofflag, rdonly, cache, dirlen, ncookies; 2768 u_quad_t frev, off, toff, verf; 2769 off_t *cookies = NULL, *cookiep; 2770 2771 fhp = &nfh.fh_generic; 2772 nfsm_srvmtofh(fhp); 2773 nfsm_dissect(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 2774 fxdr_hyper(tl, &toff); 2775 tl += 2; 2776 fxdr_hyper(tl, &verf); 2777 tl += 2; 2778 siz = fxdr_unsigned(int, *tl++); 2779 cnt = fxdr_unsigned(int, *tl); 2780 off = toff; 2781 siz = ((siz + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1)); 2782 xfer = NFS_SRVMAXDATA(nfsd); 2783 if (siz > xfer) 2784 siz = xfer; 2785 fullsiz = siz; 2786 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 2787 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2788 if (!error && vp->v_type != VDIR) { 2789 error = ENOTDIR; 2790 vput(vp); 2791 } 2792 if (error) { 2793 nfsm_reply(NFSX_UNSIGNED); 2794 nfsm_srvpostop_attr(getret, &at); 2795 return (0); 2796 } 2797 error = getret = VOP_GETATTR(vp, &at, cred, procp); 2798 #ifdef NFS3_STRICTVERF 2799 /* 2800 * XXX This check is too strict for Solaris 2.5 clients. 2801 */ 2802 if (!error && toff && verf != at.va_filerev) 2803 error = NFSERR_BAD_COOKIE; 2804 #endif 2805 if (!error) { 2806 nqsrv_getl(vp, ND_READ); 2807 error = nfsrv_access(vp, VEXEC, cred, rdonly, procp, 0); 2808 } 2809 if (error) { 2810 vput(vp); 2811 nfsm_reply(NFSX_V3POSTOPATTR); 2812 nfsm_srvpostop_attr(getret, &at); 2813 return (0); 2814 } 2815 #ifdef Lite2_integrated 2816 VOP_UNLOCK(vp, 0, procp); 2817 #else 2818 VOP_UNLOCK(vp); 2819 #endif 2820 2821 MALLOC(rbuf, caddr_t, siz, M_TEMP, M_WAITOK); 2822 ncookies = siz / (7 * NFSX_UNSIGNED); 2823 MALLOC(cookies, off_t *, ncookies * sizeof (off_t), M_TEMP, 2824 M_WAITOK); 2825 again: 2826 iv.iov_base = rbuf; 2827 iv.iov_len = fullsiz; 2828 io.uio_iov = &iv; 2829 io.uio_iovcnt = 1; 2830 io.uio_offset = (off_t)off; 2831 io.uio_resid = fullsiz; 2832 io.uio_segflg = UIO_SYSSPACE; 2833 io.uio_rw = UIO_READ; 2834 io.uio_procp = (struct proc *)0; 2835 eofflag = 0; 2836 2837 #ifdef Lite2_integrated 2838 VOP_LOCK(vp, 0, procp); 2839 #else 2840 VOP_LOCK(vp); 2841 #endif 2842 error = VOP_READDIR(vp, &io, cred, &eofflag, cookies, ncookies); 2843 2844 off = (u_quad_t)io.uio_offset; 2845 getret = VOP_GETATTR(vp, &at, cred, procp); 2846 2847 #ifdef Lite2_integrated 2848 VOP_UNLOCK(vp, 0, procp); 2849 #else 2850 VOP_UNLOCK(vp); 2851 #endif 2852 2853 /* 2854 * If the VGET operation doesn't work for this filesystem, 2855 * we can't support readdirplus. Returning NOTSUPP should 2856 * make clients fall back to plain readdir. 2857 * There's no need to check for VPTOFH as well, we wouldn't 2858 * even be here otherwise. 2859 */ 2860 if (!getret) { 2861 if ((getret = VFS_VGET(vp->v_mount, at.va_fileid, &nvp))) 2862 getret = (getret == EOPNOTSUPP) ? 2863 NFSERR_NOTSUPP : NFSERR_IO; 2864 else 2865 vput(nvp); 2866 } 2867 2868 if (!cookies && !error) 2869 error = NFSERR_PERM; 2870 if (!error) 2871 error = getret; 2872 if (error) { 2873 vrele(vp); 2874 if (cookies) 2875 free((caddr_t)cookies, M_TEMP); 2876 free((caddr_t)rbuf, M_TEMP); 2877 nfsm_reply(NFSX_V3POSTOPATTR); 2878 nfsm_srvpostop_attr(getret, &at); 2879 return (0); 2880 } 2881 if (io.uio_resid) { 2882 siz -= io.uio_resid; 2883 2884 /* 2885 * If nothing read, return eof 2886 * rpc reply 2887 */ 2888 if (siz == 0) { 2889 vrele(vp); 2890 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF + 2891 2 * NFSX_UNSIGNED); 2892 nfsm_srvpostop_attr(getret, &at); 2893 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 2894 txdr_hyper(&at.va_filerev, tl); 2895 tl += 2; 2896 *tl++ = nfs_false; 2897 *tl = nfs_true; 2898 FREE((caddr_t)cookies, M_TEMP); 2899 FREE((caddr_t)rbuf, M_TEMP); 2900 return (0); 2901 } 2902 } 2903 2904 /* 2905 * Check for degenerate cases of nothing useful read. 2906 * If so go try again 2907 */ 2908 cpos = rbuf; 2909 cend = rbuf + siz; 2910 dp = (struct dirent *)cpos; 2911 cookiep = cookies; 2912 2913 while (cpos < cend && ncookies > 0 && 2914 (dp->d_fileno == 0 || dp->d_type == DT_WHT)) { 2915 cpos += dp->d_reclen; 2916 dp = (struct dirent *)cpos; 2917 cookiep++; 2918 ncookies--; 2919 } 2920 if (cpos >= cend || ncookies == 0) { 2921 toff = off; 2922 siz = fullsiz; 2923 goto again; 2924 } 2925 2926 dirlen = len = NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF + 2 * NFSX_UNSIGNED; 2927 nfsm_reply(cnt); 2928 nfsm_srvpostop_attr(getret, &at); 2929 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2930 txdr_hyper(&at.va_filerev, tl); 2931 mp = mp2 = mb; 2932 bp = bpos; 2933 be = bp + M_TRAILINGSPACE(mp); 2934 2935 /* Loop through the records and build reply */ 2936 while (cpos < cend && ncookies > 0) { 2937 if (dp->d_fileno != 0 && dp->d_type != DT_WHT) { 2938 nlen = dp->d_namlen; 2939 rem = nfsm_rndup(nlen)-nlen; 2940 2941 /* 2942 * For readdir_and_lookup get the vnode using 2943 * the file number. 2944 */ 2945 if (VFS_VGET(vp->v_mount, dp->d_fileno, &nvp)) 2946 goto invalid; 2947 bzero((caddr_t)nfhp, NFSX_V3FH); 2948 nfhp->fh_fsid = 2949 nvp->v_mount->mnt_stat.f_fsid; 2950 if (VFS_VPTOFH(nvp, &nfhp->fh_fid)) { 2951 vput(nvp); 2952 goto invalid; 2953 } 2954 if (VOP_GETATTR(nvp, vap, cred, procp)) { 2955 vput(nvp); 2956 goto invalid; 2957 } 2958 vput(nvp); 2959 2960 /* 2961 * If either the dircount or maxcount will be 2962 * exceeded, get out now. Both of these lengths 2963 * are calculated conservatively, including all 2964 * XDR overheads. 2965 */ 2966 len += (7 * NFSX_UNSIGNED + nlen + rem + NFSX_V3FH + 2967 NFSX_V3POSTOPATTR); 2968 dirlen += (6 * NFSX_UNSIGNED + nlen + rem); 2969 if (len > cnt || dirlen > fullsiz) { 2970 eofflag = 0; 2971 break; 2972 } 2973 2974 /* 2975 * Build the directory record xdr from 2976 * the dirent entry. 2977 */ 2978 fp = (struct nfs_fattr *)&fl.fl_fattr; 2979 nfsm_srvfillattr(vap, fp); 2980 fl.fl_fhsize = txdr_unsigned(NFSX_V3FH); 2981 fl.fl_fhok = nfs_true; 2982 fl.fl_postopok = nfs_true; 2983 txdr_hyper(cookiep, fl.fl_off.nfsuquad); 2984 2985 nfsm_clget; 2986 *tl = nfs_true; 2987 bp += NFSX_UNSIGNED; 2988 nfsm_clget; 2989 *tl = 0; 2990 bp += NFSX_UNSIGNED; 2991 nfsm_clget; 2992 *tl = txdr_unsigned(dp->d_fileno); 2993 bp += NFSX_UNSIGNED; 2994 nfsm_clget; 2995 *tl = txdr_unsigned(nlen); 2996 bp += NFSX_UNSIGNED; 2997 2998 /* And loop around copying the name */ 2999 xfer = nlen; 3000 cp = dp->d_name; 3001 while (xfer > 0) { 3002 nfsm_clget; 3003 if ((bp + xfer) > be) 3004 tsiz = be - bp; 3005 else 3006 tsiz = xfer; 3007 bcopy(cp, bp, tsiz); 3008 bp += tsiz; 3009 xfer -= tsiz; 3010 if (xfer > 0) 3011 cp += tsiz; 3012 } 3013 /* And null pad to an int32_t boundary */ 3014 for (i = 0; i < rem; i++) 3015 *bp++ = '\0'; 3016 3017 /* 3018 * Now copy the flrep structure out. 3019 */ 3020 xfer = sizeof (struct flrep); 3021 cp = (caddr_t)&fl; 3022 while (xfer > 0) { 3023 nfsm_clget; 3024 if ((bp + xfer) > be) 3025 tsiz = be - bp; 3026 else 3027 tsiz = xfer; 3028 bcopy(cp, bp, tsiz); 3029 bp += tsiz; 3030 xfer -= tsiz; 3031 if (xfer > 0) 3032 cp += tsiz; 3033 } 3034 } 3035 invalid: 3036 cpos += dp->d_reclen; 3037 dp = (struct dirent *)cpos; 3038 cookiep++; 3039 ncookies--; 3040 } 3041 vrele(vp); 3042 nfsm_clget; 3043 *tl = nfs_false; 3044 bp += NFSX_UNSIGNED; 3045 nfsm_clget; 3046 if (eofflag) 3047 *tl = nfs_true; 3048 else 3049 *tl = nfs_false; 3050 bp += NFSX_UNSIGNED; 3051 if (mp != mb) { 3052 if (bp < be) 3053 mp->m_len = bp - mtod(mp, caddr_t); 3054 } else 3055 mp->m_len += bp - bpos; 3056 FREE((caddr_t)cookies, M_TEMP); 3057 FREE((caddr_t)rbuf, M_TEMP); 3058 nfsm_srvdone; 3059 } 3060 3061 /* 3062 * nfs commit service 3063 */ 3064 int 3065 nfsrv_commit(nfsd, slp, procp, mrq) 3066 struct nfsrv_descript *nfsd; 3067 struct nfssvc_sock *slp; 3068 struct proc *procp; 3069 struct mbuf **mrq; 3070 { 3071 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3072 struct mbuf *nam = nfsd->nd_nam; 3073 caddr_t dpos = nfsd->nd_dpos; 3074 struct ucred *cred = &nfsd->nd_cr; 3075 struct vattr bfor, aft; 3076 struct vnode *vp; 3077 nfsfh_t nfh; 3078 fhandle_t *fhp; 3079 register u_int32_t *tl; 3080 register int32_t t1; 3081 caddr_t bpos; 3082 int error = 0, rdonly, for_ret = 1, aft_ret = 1, cnt, cache; 3083 char *cp2; 3084 struct mbuf *mb, *mb2, *mreq; 3085 u_quad_t frev, off; 3086 3087 #ifndef nolint 3088 cache = 0; 3089 #endif 3090 fhp = &nfh.fh_generic; 3091 nfsm_srvmtofh(fhp); 3092 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 3093 3094 /* 3095 * XXX At this time VOP_FSYNC() does not accept offset and byte 3096 * count parameters, so these arguments are useless (someday maybe). 3097 */ 3098 fxdr_hyper(tl, &off); 3099 tl += 2; 3100 cnt = fxdr_unsigned(int, *tl); 3101 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 3102 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 3103 if (error) { 3104 nfsm_reply(2 * NFSX_UNSIGNED); 3105 nfsm_srvwcc_data(for_ret, &bfor, aft_ret, &aft); 3106 return (0); 3107 } 3108 for_ret = VOP_GETATTR(vp, &bfor, cred, procp); 3109 error = VOP_FSYNC(vp, cred, MNT_WAIT, procp); 3110 aft_ret = VOP_GETATTR(vp, &aft, cred, procp); 3111 vput(vp); 3112 nfsm_reply(NFSX_V3WCCDATA + NFSX_V3WRITEVERF); 3113 nfsm_srvwcc_data(for_ret, &bfor, aft_ret, &aft); 3114 if (!error) { 3115 nfsm_build(tl, u_int32_t *, NFSX_V3WRITEVERF); 3116 *tl++ = txdr_unsigned(boottime.tv_sec); 3117 *tl = txdr_unsigned(boottime.tv_usec); 3118 } else 3119 return (0); 3120 nfsm_srvdone; 3121 } 3122 3123 /* 3124 * nfs statfs service 3125 */ 3126 int 3127 nfsrv_statfs(nfsd, slp, procp, mrq) 3128 struct nfsrv_descript *nfsd; 3129 struct nfssvc_sock *slp; 3130 struct proc *procp; 3131 struct mbuf **mrq; 3132 { 3133 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3134 struct mbuf *nam = nfsd->nd_nam; 3135 caddr_t dpos = nfsd->nd_dpos; 3136 struct ucred *cred = &nfsd->nd_cr; 3137 register struct statfs *sf; 3138 register struct nfs_statfs *sfp; 3139 register u_int32_t *tl; 3140 register int32_t t1; 3141 caddr_t bpos; 3142 int error = 0, rdonly, cache, getret = 1; 3143 int v3 = (nfsd->nd_flag & ND_NFSV3); 3144 char *cp2; 3145 struct mbuf *mb, *mb2, *mreq; 3146 struct vnode *vp; 3147 struct vattr at; 3148 nfsfh_t nfh; 3149 fhandle_t *fhp; 3150 struct statfs statfs; 3151 u_quad_t frev, tval; 3152 3153 #ifndef nolint 3154 cache = 0; 3155 #endif 3156 fhp = &nfh.fh_generic; 3157 nfsm_srvmtofh(fhp); 3158 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 3159 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 3160 if (error) { 3161 nfsm_reply(NFSX_UNSIGNED); 3162 nfsm_srvpostop_attr(getret, &at); 3163 return (0); 3164 } 3165 sf = &statfs; 3166 error = VFS_STATFS(vp->v_mount, sf, procp); 3167 getret = VOP_GETATTR(vp, &at, cred, procp); 3168 vput(vp); 3169 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_STATFS(v3)); 3170 if (v3) 3171 nfsm_srvpostop_attr(getret, &at); 3172 if (error) 3173 return (0); 3174 nfsm_build(sfp, struct nfs_statfs *, NFSX_STATFS(v3)); 3175 if (v3) { 3176 tval = (u_quad_t)sf->f_blocks; 3177 tval *= (u_quad_t)sf->f_bsize; 3178 txdr_hyper(&tval, &sfp->sf_tbytes); 3179 tval = (u_quad_t)sf->f_bfree; 3180 tval *= (u_quad_t)sf->f_bsize; 3181 txdr_hyper(&tval, &sfp->sf_fbytes); 3182 tval = (u_quad_t)sf->f_bavail; 3183 tval *= (u_quad_t)sf->f_bsize; 3184 txdr_hyper(&tval, &sfp->sf_abytes); 3185 sfp->sf_tfiles.nfsuquad[0] = 0; 3186 sfp->sf_tfiles.nfsuquad[1] = txdr_unsigned(sf->f_files); 3187 sfp->sf_ffiles.nfsuquad[0] = 0; 3188 sfp->sf_ffiles.nfsuquad[1] = txdr_unsigned(sf->f_ffree); 3189 sfp->sf_afiles.nfsuquad[0] = 0; 3190 sfp->sf_afiles.nfsuquad[1] = txdr_unsigned(sf->f_ffree); 3191 sfp->sf_invarsec = 0; 3192 } else { 3193 sfp->sf_tsize = txdr_unsigned(NFS_MAXDGRAMDATA); 3194 sfp->sf_bsize = txdr_unsigned(sf->f_bsize); 3195 sfp->sf_blocks = txdr_unsigned(sf->f_blocks); 3196 sfp->sf_bfree = txdr_unsigned(sf->f_bfree); 3197 sfp->sf_bavail = txdr_unsigned(sf->f_bavail); 3198 } 3199 nfsm_srvdone; 3200 } 3201 3202 /* 3203 * nfs fsinfo service 3204 */ 3205 int 3206 nfsrv_fsinfo(nfsd, slp, procp, mrq) 3207 struct nfsrv_descript *nfsd; 3208 struct nfssvc_sock *slp; 3209 struct proc *procp; 3210 struct mbuf **mrq; 3211 { 3212 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3213 struct mbuf *nam = nfsd->nd_nam; 3214 caddr_t dpos = nfsd->nd_dpos; 3215 struct ucred *cred = &nfsd->nd_cr; 3216 register u_int32_t *tl; 3217 register struct nfsv3_fsinfo *sip; 3218 register int32_t t1; 3219 caddr_t bpos; 3220 int error = 0, rdonly, cache, getret = 1, pref; 3221 char *cp2; 3222 struct mbuf *mb, *mb2, *mreq; 3223 struct vnode *vp; 3224 struct vattr at; 3225 nfsfh_t nfh; 3226 fhandle_t *fhp; 3227 u_quad_t frev, maxfsize; 3228 struct statfs sb; 3229 3230 #ifndef nolint 3231 cache = 0; 3232 #endif 3233 fhp = &nfh.fh_generic; 3234 nfsm_srvmtofh(fhp); 3235 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 3236 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 3237 if (error) { 3238 nfsm_reply(NFSX_UNSIGNED); 3239 nfsm_srvpostop_attr(getret, &at); 3240 return (0); 3241 } 3242 3243 /* XXX Try to make a guess on the max file size. */ 3244 VFS_STATFS(vp->v_mount, &sb, (struct proc *)0); 3245 maxfsize = (u_quad_t)0x80000000 * sb.f_bsize - 1; 3246 3247 getret = VOP_GETATTR(vp, &at, cred, procp); 3248 vput(vp); 3249 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3FSINFO); 3250 nfsm_srvpostop_attr(getret, &at); 3251 nfsm_build(sip, struct nfsv3_fsinfo *, NFSX_V3FSINFO); 3252 3253 /* 3254 * XXX 3255 * There should be file system VFS OP(s) to get this information. 3256 * For now, assume ufs. 3257 */ 3258 if (slp->ns_so->so_type == SOCK_DGRAM) 3259 pref = NFS_MAXDGRAMDATA; 3260 else 3261 pref = NFS_MAXDATA; 3262 sip->fs_rtmax = txdr_unsigned(NFS_MAXDATA); 3263 sip->fs_rtpref = txdr_unsigned(pref); 3264 sip->fs_rtmult = txdr_unsigned(NFS_FABLKSIZE); 3265 sip->fs_wtmax = txdr_unsigned(NFS_MAXDATA); 3266 sip->fs_wtpref = txdr_unsigned(pref); 3267 sip->fs_wtmult = txdr_unsigned(NFS_FABLKSIZE); 3268 sip->fs_dtpref = txdr_unsigned(pref); 3269 txdr_hyper(&maxfsize, &sip->fs_maxfilesize); 3270 sip->fs_timedelta.nfsv3_sec = 0; 3271 sip->fs_timedelta.nfsv3_nsec = txdr_unsigned(1); 3272 sip->fs_properties = txdr_unsigned(NFSV3FSINFO_LINK | 3273 NFSV3FSINFO_SYMLINK | NFSV3FSINFO_HOMOGENEOUS | 3274 NFSV3FSINFO_CANSETTIME); 3275 nfsm_srvdone; 3276 } 3277 3278 /* 3279 * nfs pathconf service 3280 */ 3281 int 3282 nfsrv_pathconf(nfsd, slp, procp, mrq) 3283 struct nfsrv_descript *nfsd; 3284 struct nfssvc_sock *slp; 3285 struct proc *procp; 3286 struct mbuf **mrq; 3287 { 3288 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3289 struct mbuf *nam = nfsd->nd_nam; 3290 caddr_t dpos = nfsd->nd_dpos; 3291 struct ucred *cred = &nfsd->nd_cr; 3292 register u_int32_t *tl; 3293 register struct nfsv3_pathconf *pc; 3294 register int32_t t1; 3295 caddr_t bpos; 3296 int error = 0, rdonly, cache, getret = 1; 3297 register_t linkmax, namemax, chownres, notrunc; 3298 char *cp2; 3299 struct mbuf *mb, *mb2, *mreq; 3300 struct vnode *vp; 3301 struct vattr at; 3302 nfsfh_t nfh; 3303 fhandle_t *fhp; 3304 u_quad_t frev; 3305 3306 #ifndef nolint 3307 cache = 0; 3308 #endif 3309 fhp = &nfh.fh_generic; 3310 nfsm_srvmtofh(fhp); 3311 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 3312 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 3313 if (error) { 3314 nfsm_reply(NFSX_UNSIGNED); 3315 nfsm_srvpostop_attr(getret, &at); 3316 return (0); 3317 } 3318 error = VOP_PATHCONF(vp, _PC_LINK_MAX, &linkmax); 3319 if (!error) 3320 error = VOP_PATHCONF(vp, _PC_NAME_MAX, &namemax); 3321 if (!error) 3322 error = VOP_PATHCONF(vp, _PC_CHOWN_RESTRICTED, &chownres); 3323 if (!error) 3324 error = VOP_PATHCONF(vp, _PC_NO_TRUNC, ¬runc); 3325 getret = VOP_GETATTR(vp, &at, cred, procp); 3326 vput(vp); 3327 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3PATHCONF); 3328 nfsm_srvpostop_attr(getret, &at); 3329 if (error) 3330 return (0); 3331 nfsm_build(pc, struct nfsv3_pathconf *, NFSX_V3PATHCONF); 3332 3333 pc->pc_linkmax = txdr_unsigned(linkmax); 3334 pc->pc_namemax = txdr_unsigned(namemax); 3335 pc->pc_notrunc = txdr_unsigned(notrunc); 3336 pc->pc_chownrestricted = txdr_unsigned(chownres); 3337 3338 /* 3339 * These should probably be supported by VOP_PATHCONF(), but 3340 * until msdosfs is exportable (why would you want to?), the 3341 * Unix defaults should be ok. 3342 */ 3343 pc->pc_caseinsensitive = nfs_false; 3344 pc->pc_casepreserving = nfs_true; 3345 nfsm_srvdone; 3346 } 3347 3348 /* 3349 * Null operation, used by clients to ping server 3350 */ 3351 /* ARGSUSED */ 3352 int 3353 nfsrv_null(nfsd, slp, procp, mrq) 3354 struct nfsrv_descript *nfsd; 3355 struct nfssvc_sock *slp; 3356 struct proc *procp; 3357 struct mbuf **mrq; 3358 { 3359 struct mbuf *mrep = nfsd->nd_mrep; 3360 caddr_t bpos; 3361 int error = NFSERR_RETVOID, cache = 0; 3362 struct mbuf *mb, *mreq; 3363 u_quad_t frev; 3364 3365 nfsm_reply(0); 3366 return (0); 3367 } 3368 3369 /* 3370 * No operation, used for obsolete procedures 3371 */ 3372 /* ARGSUSED */ 3373 int 3374 nfsrv_noop(nfsd, slp, procp, mrq) 3375 struct nfsrv_descript *nfsd; 3376 struct nfssvc_sock *slp; 3377 struct proc *procp; 3378 struct mbuf **mrq; 3379 { 3380 struct mbuf *mrep = nfsd->nd_mrep; 3381 caddr_t bpos; 3382 int error, cache = 0; 3383 struct mbuf *mb, *mreq; 3384 u_quad_t frev; 3385 3386 if (nfsd->nd_repstat) 3387 error = nfsd->nd_repstat; 3388 else 3389 error = EPROCUNAVAIL; 3390 nfsm_reply(0); 3391 return (0); 3392 } 3393 3394 /* 3395 * Perform access checking for vnodes obtained from file handles that would 3396 * refer to files already opened by a Unix client. You cannot just use 3397 * vn_writechk() and VOP_ACCESS() for two reasons. 3398 * 1 - You must check for exported rdonly as well as MNT_RDONLY for the write case 3399 * 2 - The owner is to be given access irrespective of mode bits for some 3400 * operations, so that processes that chmod after opening a file don't 3401 * break. I don't like this because it opens a security hole, but since 3402 * the nfs server opens a security hole the size of a barn door anyhow, 3403 * what the heck. 3404 * 3405 * The exception to rule 2 is EPERM. If a file is IMMUTABLE, VOP_ACCESS() 3406 * will return EPERM instead of EACCESS. EPERM is always an error. 3407 */ 3408 int 3409 nfsrv_access(vp, flags, cred, rdonly, p, override) 3410 register struct vnode *vp; 3411 int flags; 3412 register struct ucred *cred; 3413 int rdonly; 3414 struct proc *p; 3415 { 3416 struct vattr vattr; 3417 int error; 3418 if (flags & VWRITE) { 3419 /* Just vn_writechk() changed to check rdonly */ 3420 /* 3421 * Disallow write attempts on read-only file systems; 3422 * unless the file is a socket or a block or character 3423 * device resident on the file system. 3424 */ 3425 if (rdonly || (vp->v_mount->mnt_flag & MNT_RDONLY)) { 3426 switch (vp->v_type) { 3427 case VREG: 3428 case VDIR: 3429 case VLNK: 3430 return (EROFS); 3431 default: 3432 break; 3433 } 3434 } 3435 /* 3436 * If there's shared text associated with 3437 * the inode, try to free it up once. If 3438 * we fail, we can't allow writing. 3439 */ 3440 #if defined(UVM) 3441 if ((vp->v_flag & VTEXT) && !uvm_vnp_uncache(vp)) 3442 return (ETXTBSY); 3443 #else 3444 if ((vp->v_flag & VTEXT) && !vnode_pager_uncache(vp)) 3445 return (ETXTBSY); 3446 #endif 3447 } 3448 error = VOP_GETATTR(vp, &vattr, cred, p); 3449 if (error) 3450 return (error); 3451 error = VOP_ACCESS(vp, flags, cred, p); 3452 /* 3453 * Allow certain operations for the owner (reads and writes 3454 * on files that are already open). 3455 */ 3456 if (override && error == EACCES && cred->cr_uid == vattr.va_uid) 3457 error = 0; 3458 return error; 3459 } 3460
Indexes created Wed Sep 24 15:09:51 GMT 2025