nfs_serv.c revision 1.51.2.2
1 /* $NetBSD: nfs_serv.c,v 1.51.2.2 2000/12/08 09:19:21 bouyer 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 8.8 (Berkeley) 7/31/95 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 <uvm/uvm_extern.h> 77 78 #include <nfs/nfsproto.h> 79 #include <nfs/rpcv2.h> 80 #include <nfs/nfs.h> 81 #include <nfs/xdr_subs.h> 82 #include <nfs/nfsm_subs.h> 83 #include <nfs/nqnfs.h> 84 #include <nfs/nfs_var.h> 85 86 /* Global vars */ 87 extern u_int32_t nfs_xdrneg1; 88 extern u_int32_t nfs_false, nfs_true; 89 extern enum vtype nv3tov_type[8]; 90 extern struct nfsstats nfsstats; 91 extern nfstype nfsv2_type[9]; 92 extern nfstype nfsv3_type[9]; 93 int nfsrvw_procrastinate = NFS_GATHERDELAY * 1000; 94 95 /* 96 * nfs v3 access service 97 */ 98 int 99 nfsrv3_access(nfsd, slp, procp, mrq) 100 struct nfsrv_descript *nfsd; 101 struct nfssvc_sock *slp; 102 struct proc *procp; 103 struct mbuf **mrq; 104 { 105 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 106 struct mbuf *nam = nfsd->nd_nam; 107 caddr_t dpos = nfsd->nd_dpos; 108 struct ucred *cred = &nfsd->nd_cr; 109 struct vnode *vp; 110 nfsfh_t nfh; 111 fhandle_t *fhp; 112 u_int32_t *tl; 113 int32_t t1; 114 caddr_t bpos; 115 int error = 0, rdonly, cache = 0, getret; 116 char *cp2; 117 struct mbuf *mb, *mreq, *mb2; 118 struct vattr va; 119 u_long inmode, testmode, outmode; 120 u_quad_t frev; 121 122 fhp = &nfh.fh_generic; 123 nfsm_srvmtofh(fhp); 124 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 125 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, &rdonly, 126 (nfsd->nd_flag & ND_KERBAUTH), FALSE); 127 if (error) { 128 nfsm_reply(NFSX_UNSIGNED); 129 nfsm_srvpostop_attr(1, (struct vattr *)0); 130 return (0); 131 } 132 inmode = fxdr_unsigned(u_int32_t, *tl); 133 outmode = 0; 134 if ((inmode & NFSV3ACCESS_READ) && 135 nfsrv_access(vp, VREAD, cred, rdonly, procp, 0) == 0) 136 outmode |= NFSV3ACCESS_READ; 137 if (vp->v_type != VDIR) { 138 testmode = inmode & (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND); 139 if (testmode && 140 nfsrv_access(vp, VWRITE, cred, rdonly, procp, 0) == 0) 141 outmode |= testmode; 142 if ((inmode & NFSV3ACCESS_EXECUTE) && 143 nfsrv_access(vp, VEXEC, cred, rdonly, procp, 0) == 0) 144 outmode |= NFSV3ACCESS_EXECUTE; 145 } else { 146 testmode = inmode & (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | 147 NFSV3ACCESS_DELETE); 148 if (testmode && 149 nfsrv_access(vp, VWRITE, cred, rdonly, procp, 0) == 0) 150 outmode |= testmode; 151 if ((inmode & NFSV3ACCESS_LOOKUP) && 152 nfsrv_access(vp, VEXEC, cred, rdonly, procp, 0) == 0) 153 outmode |= NFSV3ACCESS_LOOKUP; 154 } 155 getret = VOP_GETATTR(vp, &va, cred, procp); 156 vput(vp); 157 nfsm_reply(NFSX_POSTOPATTR(1) + NFSX_UNSIGNED); 158 nfsm_srvpostop_attr(getret, &va); 159 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 160 *tl = txdr_unsigned(outmode); 161 nfsm_srvdone; 162 } 163 164 /* 165 * nfs getattr service 166 */ 167 int 168 nfsrv_getattr(nfsd, slp, procp, mrq) 169 struct nfsrv_descript *nfsd; 170 struct nfssvc_sock *slp; 171 struct proc *procp; 172 struct mbuf **mrq; 173 { 174 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 175 struct mbuf *nam = nfsd->nd_nam; 176 caddr_t dpos = nfsd->nd_dpos; 177 struct ucred *cred = &nfsd->nd_cr; 178 struct nfs_fattr *fp; 179 struct vattr va; 180 struct vnode *vp; 181 nfsfh_t nfh; 182 fhandle_t *fhp; 183 u_int32_t *tl; 184 int32_t t1; 185 caddr_t bpos; 186 int error = 0, rdonly, cache; 187 char *cp2; 188 struct mbuf *mb, *mb2, *mreq; 189 u_quad_t frev; 190 191 fhp = &nfh.fh_generic; 192 nfsm_srvmtofh(fhp); 193 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, &rdonly, 194 (nfsd->nd_flag & ND_KERBAUTH), FALSE); 195 if (error) { 196 nfsm_reply(0); 197 return (0); 198 } 199 nqsrv_getl(vp, ND_READ); 200 error = VOP_GETATTR(vp, &va, cred, procp); 201 vput(vp); 202 nfsm_reply(NFSX_FATTR(nfsd->nd_flag & ND_NFSV3)); 203 if (error) 204 return (0); 205 nfsm_build(fp, struct nfs_fattr *, NFSX_FATTR(nfsd->nd_flag & ND_NFSV3)); 206 nfsm_srvfillattr(&va, fp); 207 nfsm_srvdone; 208 } 209 210 /* 211 * nfs setattr service 212 */ 213 int 214 nfsrv_setattr(nfsd, slp, procp, mrq) 215 struct nfsrv_descript *nfsd; 216 struct nfssvc_sock *slp; 217 struct proc *procp; 218 struct mbuf **mrq; 219 { 220 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 221 struct mbuf *nam = nfsd->nd_nam; 222 caddr_t dpos = nfsd->nd_dpos; 223 struct ucred *cred = &nfsd->nd_cr; 224 struct vattr va, preat; 225 struct nfsv2_sattr *sp; 226 struct nfs_fattr *fp; 227 struct vnode *vp; 228 nfsfh_t nfh; 229 fhandle_t *fhp; 230 u_int32_t *tl; 231 int32_t t1; 232 caddr_t bpos; 233 int error = 0, rdonly, cache, preat_ret = 1, postat_ret = 1; 234 int v3 = (nfsd->nd_flag & ND_NFSV3), gcheck = 0; 235 char *cp2; 236 struct mbuf *mb, *mb2, *mreq; 237 u_quad_t frev; 238 struct timespec guard; 239 240 fhp = &nfh.fh_generic; 241 nfsm_srvmtofh(fhp); 242 VATTR_NULL(&va); 243 if (v3) { 244 nfsm_srvsattr(&va); 245 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 246 gcheck = fxdr_unsigned(int, *tl); 247 if (gcheck) { 248 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 249 fxdr_nfsv3time(tl, &guard); 250 } 251 } else { 252 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 253 /* 254 * Nah nah nah nah na nah 255 * There is a bug in the Sun client that puts 0xffff in the mode 256 * field of sattr when it should put in 0xffffffff. The u_short 257 * doesn't sign extend. 258 * --> check the low order 2 bytes for 0xffff 259 */ 260 if ((fxdr_unsigned(int, sp->sa_mode) & 0xffff) != 0xffff) 261 va.va_mode = nfstov_mode(sp->sa_mode); 262 if (sp->sa_uid != nfs_xdrneg1) 263 va.va_uid = fxdr_unsigned(uid_t, sp->sa_uid); 264 if (sp->sa_gid != nfs_xdrneg1) 265 va.va_gid = fxdr_unsigned(gid_t, sp->sa_gid); 266 if (sp->sa_size != nfs_xdrneg1) 267 va.va_size = fxdr_unsigned(u_quad_t, sp->sa_size); 268 if (sp->sa_atime.nfsv2_sec != nfs_xdrneg1) { 269 #ifdef notyet 270 fxdr_nfsv2time(&sp->sa_atime, &va.va_atime); 271 #else 272 va.va_atime.tv_sec = 273 fxdr_unsigned(u_int32_t,sp->sa_atime.nfsv2_sec); 274 va.va_atime.tv_nsec = 0; 275 #endif 276 } 277 if (sp->sa_mtime.nfsv2_sec != nfs_xdrneg1) 278 fxdr_nfsv2time(&sp->sa_mtime, &va.va_mtime); 279 280 } 281 282 /* 283 * Now that we have all the fields, lets do it. 284 */ 285 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, &rdonly, 286 (nfsd->nd_flag & ND_KERBAUTH), FALSE); 287 if (error) { 288 nfsm_reply(2 * NFSX_UNSIGNED); 289 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 290 return (0); 291 } 292 nqsrv_getl(vp, ND_WRITE); 293 if (v3) { 294 error = preat_ret = VOP_GETATTR(vp, &preat, cred, procp); 295 if (!error && gcheck && 296 (preat.va_ctime.tv_sec != guard.tv_sec || 297 preat.va_ctime.tv_nsec != guard.tv_nsec)) 298 error = NFSERR_NOT_SYNC; 299 if (error) { 300 vput(vp); 301 nfsm_reply(NFSX_WCCDATA(v3)); 302 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 303 return (0); 304 } 305 } 306 307 /* 308 * If the size is being changed write acces is required, otherwise 309 * just check for a read only file system. 310 */ 311 if (va.va_size == ((u_quad_t)((quad_t) -1))) { 312 if (rdonly || (vp->v_mount->mnt_flag & MNT_RDONLY)) { 313 error = EROFS; 314 goto out; 315 } 316 } else { 317 if (vp->v_type == VDIR) { 318 error = EISDIR; 319 goto out; 320 } else if ((error = nfsrv_access(vp, VWRITE, cred, rdonly, 321 procp, 0)) != 0) 322 goto out; 323 } 324 error = VOP_SETATTR(vp, &va, cred, procp); 325 postat_ret = VOP_GETATTR(vp, &va, cred, procp); 326 if (!error) 327 error = postat_ret; 328 out: 329 vput(vp); 330 nfsm_reply(NFSX_WCCORFATTR(v3)); 331 if (v3) { 332 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 333 return (0); 334 } else { 335 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 336 nfsm_srvfillattr(&va, fp); 337 } 338 nfsm_srvdone; 339 } 340 341 /* 342 * nfs lookup rpc 343 */ 344 int 345 nfsrv_lookup(nfsd, slp, procp, mrq) 346 struct nfsrv_descript *nfsd; 347 struct nfssvc_sock *slp; 348 struct proc *procp; 349 struct mbuf **mrq; 350 { 351 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 352 struct mbuf *nam = nfsd->nd_nam; 353 caddr_t dpos = nfsd->nd_dpos; 354 struct ucred *cred = &nfsd->nd_cr; 355 struct nfs_fattr *fp; 356 struct nameidata nd, ind, *ndp = &nd; 357 struct vnode *vp, *dirp; 358 nfsfh_t nfh; 359 fhandle_t *fhp; 360 caddr_t cp; 361 u_int32_t *tl; 362 int32_t t1; 363 caddr_t bpos; 364 int error = 0, cache, len, dirattr_ret = 1; 365 int v3 = (nfsd->nd_flag & ND_NFSV3), pubflag; 366 char *cp2; 367 struct mbuf *mb, *mb2, *mreq; 368 struct vattr va, dirattr; 369 u_quad_t frev; 370 371 fhp = &nfh.fh_generic; 372 nfsm_srvmtofh(fhp); 373 nfsm_srvnamesiz(len); 374 375 pubflag = nfs_ispublicfh(fhp); 376 377 nd.ni_cnd.cn_cred = cred; 378 nd.ni_cnd.cn_nameiop = LOOKUP; 379 nd.ni_cnd.cn_flags = LOCKLEAF | SAVESTART; 380 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 381 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), pubflag); 382 383 if (!error && pubflag) { 384 if (nd.ni_vp->v_type == VDIR && nfs_pub.np_index != NULL) { 385 /* 386 * Setup call to lookup() to see if we can find 387 * the index file. Arguably, this doesn't belong 388 * in a kernel.. Ugh. 389 */ 390 ind = nd; 391 VOP_UNLOCK(nd.ni_vp, 0); 392 ind.ni_pathlen = strlen(nfs_pub.np_index); 393 ind.ni_cnd.cn_nameptr = ind.ni_cnd.cn_pnbuf = 394 nfs_pub.np_index; 395 ind.ni_startdir = nd.ni_vp; 396 VREF(ind.ni_startdir); 397 error = lookup(&ind); 398 if (!error) { 399 /* 400 * Found an index file. Get rid of 401 * the old references. 402 */ 403 if (dirp) 404 vrele(dirp); 405 dirp = nd.ni_vp; 406 vrele(nd.ni_startdir); 407 ndp = &ind; 408 } else 409 error = 0; 410 } 411 /* 412 * If the public filehandle was used, check that this lookup 413 * didn't result in a filehandle outside the publicly exported 414 * filesystem. 415 */ 416 417 if (!error && ndp->ni_vp->v_mount != nfs_pub.np_mount) { 418 vput(nd.ni_vp); 419 error = EPERM; 420 } 421 } 422 423 if (dirp) { 424 if (v3) 425 dirattr_ret = VOP_GETATTR(dirp, &dirattr, cred, 426 procp); 427 vrele(dirp); 428 } 429 430 if (error) { 431 nfsm_reply(NFSX_POSTOPATTR(v3)); 432 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 433 return (0); 434 } 435 436 nqsrv_getl(ndp->ni_startdir, ND_READ); 437 vrele(ndp->ni_startdir); 438 PNBUF_PUT(nd.ni_cnd.cn_pnbuf); 439 vp = ndp->ni_vp; 440 memset((caddr_t)fhp, 0, sizeof(nfh)); 441 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; 442 error = VFS_VPTOFH(vp, &fhp->fh_fid); 443 if (!error) 444 error = VOP_GETATTR(vp, &va, cred, procp); 445 vput(vp); 446 nfsm_reply(NFSX_SRVFH(v3) + NFSX_POSTOPORFATTR(v3) + NFSX_POSTOPATTR(v3)); 447 if (error) { 448 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 449 return (0); 450 } 451 nfsm_srvfhtom(fhp, v3); 452 if (v3) { 453 nfsm_srvpostop_attr(0, &va); 454 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 455 } else { 456 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 457 nfsm_srvfillattr(&va, fp); 458 } 459 nfsm_srvdone; 460 } 461 462 /* 463 * nfs readlink service 464 */ 465 int 466 nfsrv_readlink(nfsd, slp, procp, mrq) 467 struct nfsrv_descript *nfsd; 468 struct nfssvc_sock *slp; 469 struct proc *procp; 470 struct mbuf **mrq; 471 { 472 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 473 struct mbuf *nam = nfsd->nd_nam; 474 caddr_t dpos = nfsd->nd_dpos; 475 struct ucred *cred = &nfsd->nd_cr; 476 struct iovec iv[(NFS_MAXPATHLEN+MLEN-1)/MLEN]; 477 struct iovec *ivp = iv; 478 struct mbuf *mp; 479 u_int32_t *tl; 480 int32_t t1; 481 caddr_t bpos; 482 int error = 0, rdonly, cache, i, tlen, len, getret; 483 int v3 = (nfsd->nd_flag & ND_NFSV3); 484 char *cp2; 485 struct mbuf *mb, *mb2, *mp2 = NULL, *mp3 = NULL, *mreq; 486 struct vnode *vp; 487 struct vattr attr; 488 nfsfh_t nfh; 489 fhandle_t *fhp; 490 struct uio io, *uiop = &io; 491 u_quad_t frev; 492 493 fhp = &nfh.fh_generic; 494 nfsm_srvmtofh(fhp); 495 len = 0; 496 i = 0; 497 while (len < NFS_MAXPATHLEN) { 498 MGET(mp, M_WAIT, MT_DATA); 499 MCLGET(mp, M_WAIT); 500 mp->m_len = NFSMSIZ(mp); 501 if (len == 0) 502 mp3 = mp2 = mp; 503 else { 504 mp2->m_next = mp; 505 mp2 = mp; 506 } 507 if ((len+mp->m_len) > NFS_MAXPATHLEN) { 508 mp->m_len = NFS_MAXPATHLEN-len; 509 len = NFS_MAXPATHLEN; 510 } else 511 len += mp->m_len; 512 ivp->iov_base = mtod(mp, caddr_t); 513 ivp->iov_len = mp->m_len; 514 i++; 515 ivp++; 516 } 517 uiop->uio_iov = iv; 518 uiop->uio_iovcnt = i; 519 uiop->uio_offset = 0; 520 uiop->uio_resid = len; 521 uiop->uio_rw = UIO_READ; 522 uiop->uio_segflg = UIO_SYSSPACE; 523 uiop->uio_procp = (struct proc *)0; 524 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 525 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 526 if (error) { 527 m_freem(mp3); 528 nfsm_reply(2 * NFSX_UNSIGNED); 529 nfsm_srvpostop_attr(1, (struct vattr *)0); 530 return (0); 531 } 532 if (vp->v_type != VLNK) { 533 if (v3) 534 error = EINVAL; 535 else 536 error = ENXIO; 537 goto out; 538 } 539 nqsrv_getl(vp, ND_READ); 540 error = VOP_READLINK(vp, uiop, cred); 541 out: 542 getret = VOP_GETATTR(vp, &attr, cred, procp); 543 vput(vp); 544 if (error) 545 m_freem(mp3); 546 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_UNSIGNED); 547 if (v3) { 548 nfsm_srvpostop_attr(getret, &attr); 549 if (error) 550 return (0); 551 } 552 if (uiop->uio_resid > 0) { 553 len -= uiop->uio_resid; 554 tlen = nfsm_rndup(len); 555 nfsm_adj(mp3, NFS_MAXPATHLEN-tlen, tlen-len); 556 } 557 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 558 *tl = txdr_unsigned(len); 559 mb->m_next = mp3; 560 nfsm_srvdone; 561 } 562 563 /* 564 * nfs read service 565 */ 566 int 567 nfsrv_read(nfsd, slp, procp, mrq) 568 struct nfsrv_descript *nfsd; 569 struct nfssvc_sock *slp; 570 struct proc *procp; 571 struct mbuf **mrq; 572 { 573 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 574 struct mbuf *nam = nfsd->nd_nam; 575 caddr_t dpos = nfsd->nd_dpos; 576 struct ucred *cred = &nfsd->nd_cr; 577 struct iovec *iv; 578 struct iovec *iv2; 579 struct mbuf *m; 580 struct nfs_fattr *fp; 581 u_int32_t *tl; 582 int32_t t1; 583 int i; 584 caddr_t bpos; 585 int error = 0, rdonly, cache, cnt, len, left, siz, tlen, getret; 586 int v3 = (nfsd->nd_flag & ND_NFSV3), reqlen; 587 char *cp2; 588 struct mbuf *mb, *mb2, *mreq; 589 struct mbuf *m2; 590 struct vnode *vp; 591 nfsfh_t nfh; 592 fhandle_t *fhp; 593 struct uio io, *uiop = &io; 594 struct vattr va; 595 off_t off; 596 u_quad_t frev; 597 598 fhp = &nfh.fh_generic; 599 nfsm_srvmtofh(fhp); 600 if (v3) { 601 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 602 off = fxdr_hyper(tl); 603 } else { 604 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 605 off = (off_t)fxdr_unsigned(u_int32_t, *tl); 606 } 607 nfsm_srvstrsiz(reqlen, NFS_SRVMAXDATA(nfsd)); 608 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 609 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 610 if (error) { 611 nfsm_reply(2 * NFSX_UNSIGNED); 612 nfsm_srvpostop_attr(1, (struct vattr *)0); 613 return (0); 614 } 615 if (vp->v_type != VREG) { 616 if (v3) 617 error = EINVAL; 618 else 619 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 620 } 621 if (!error) { 622 nqsrv_getl(vp, ND_READ); 623 if ((error = nfsrv_access(vp, VREAD, cred, rdonly, procp, 1)) != 0) 624 error = nfsrv_access(vp, VEXEC, cred, rdonly, procp, 1); 625 } 626 getret = VOP_GETATTR(vp, &va, cred, procp); 627 if (!error) 628 error = getret; 629 if (error) { 630 vput(vp); 631 nfsm_reply(NFSX_POSTOPATTR(v3)); 632 nfsm_srvpostop_attr(getret, &va); 633 return (0); 634 } 635 if (off >= va.va_size) 636 cnt = 0; 637 else if ((off + reqlen) > va.va_size) 638 cnt = nfsm_rndup(va.va_size - off); 639 else 640 cnt = reqlen; 641 nfsm_reply(NFSX_POSTOPORFATTR(v3) + 3 * NFSX_UNSIGNED+nfsm_rndup(cnt)); 642 if (v3) { 643 nfsm_build(tl, u_int32_t *, NFSX_V3FATTR + 4 * NFSX_UNSIGNED); 644 *tl++ = nfs_true; 645 fp = (struct nfs_fattr *)tl; 646 tl += (NFSX_V3FATTR / sizeof (u_int32_t)); 647 } else { 648 nfsm_build(tl, u_int32_t *, NFSX_V2FATTR + NFSX_UNSIGNED); 649 fp = (struct nfs_fattr *)tl; 650 tl += (NFSX_V2FATTR / sizeof (u_int32_t)); 651 } 652 len = left = cnt; 653 if (cnt > 0) { 654 /* 655 * Generate the mbuf list with the uio_iov ref. to it. 656 */ 657 i = 0; 658 m = m2 = mb; 659 while (left > 0) { 660 siz = min(M_TRAILINGSPACE(m), left); 661 if (siz > 0) { 662 left -= siz; 663 i++; 664 } 665 if (left > 0) { 666 MGET(m, M_WAIT, MT_DATA); 667 MCLGET(m, M_WAIT); 668 m->m_len = 0; 669 m2->m_next = m; 670 m2 = m; 671 } 672 } 673 iv = malloc(i * sizeof (struct iovec), M_TEMP, M_WAITOK); 674 uiop->uio_iov = iv2 = iv; 675 m = mb; 676 left = cnt; 677 i = 0; 678 while (left > 0) { 679 if (m == NULL) 680 panic("nfsrv_read iov"); 681 siz = min(M_TRAILINGSPACE(m), left); 682 if (siz > 0) { 683 iv->iov_base = mtod(m, caddr_t) + m->m_len; 684 iv->iov_len = siz; 685 m->m_len += siz; 686 left -= siz; 687 iv++; 688 i++; 689 } 690 m = m->m_next; 691 } 692 uiop->uio_iovcnt = i; 693 uiop->uio_offset = off; 694 uiop->uio_resid = cnt; 695 uiop->uio_rw = UIO_READ; 696 uiop->uio_segflg = UIO_SYSSPACE; 697 error = VOP_READ(vp, uiop, IO_NODELOCKED, cred); 698 off = uiop->uio_offset; 699 free((caddr_t)iv2, M_TEMP); 700 if (error || (getret = VOP_GETATTR(vp, &va, cred, procp)) != 0){ 701 if (!error) 702 error = getret; 703 m_freem(mreq); 704 vput(vp); 705 nfsm_reply(NFSX_POSTOPATTR(v3)); 706 nfsm_srvpostop_attr(getret, &va); 707 return (0); 708 } 709 } else 710 uiop->uio_resid = 0; 711 vput(vp); 712 nfsm_srvfillattr(&va, fp); 713 len -= uiop->uio_resid; 714 tlen = nfsm_rndup(len); 715 if (cnt != tlen || tlen != len) 716 nfsm_adj(mb, cnt - tlen, tlen - len); 717 if (v3) { 718 *tl++ = txdr_unsigned(len); 719 if (len < reqlen) 720 *tl++ = nfs_true; 721 else 722 *tl++ = nfs_false; 723 } 724 *tl = txdr_unsigned(len); 725 nfsm_srvdone; 726 } 727 728 /* 729 * nfs write service 730 */ 731 int 732 nfsrv_write(nfsd, slp, procp, mrq) 733 struct nfsrv_descript *nfsd; 734 struct nfssvc_sock *slp; 735 struct proc *procp; 736 struct mbuf **mrq; 737 { 738 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 739 struct mbuf *nam = nfsd->nd_nam; 740 caddr_t dpos = nfsd->nd_dpos; 741 struct ucred *cred = &nfsd->nd_cr; 742 struct iovec *ivp; 743 int i, cnt; 744 struct mbuf *mp; 745 struct nfs_fattr *fp; 746 struct iovec *iv; 747 struct vattr va, forat; 748 u_int32_t *tl; 749 int32_t t1; 750 caddr_t bpos; 751 int error = 0, rdonly, cache, len, forat_ret = 1; 752 int ioflags, aftat_ret = 1, retlen, zeroing, adjust; 753 int stable = NFSV3WRITE_FILESYNC; 754 int v3 = (nfsd->nd_flag & ND_NFSV3); 755 char *cp2; 756 struct mbuf *mb, *mb2, *mreq; 757 struct vnode *vp; 758 nfsfh_t nfh; 759 fhandle_t *fhp; 760 struct uio io, *uiop = &io; 761 off_t off; 762 u_quad_t frev; 763 764 if (mrep == NULL) { 765 *mrq = NULL; 766 return (0); 767 } 768 fhp = &nfh.fh_generic; 769 nfsm_srvmtofh(fhp); 770 if (v3) { 771 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 772 off = fxdr_hyper(tl); 773 tl += 3; 774 stable = fxdr_unsigned(int, *tl++); 775 } else { 776 nfsm_dissect(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 777 off = (off_t)fxdr_unsigned(u_int32_t, *++tl); 778 tl += 2; 779 } 780 retlen = len = fxdr_unsigned(int32_t, *tl); 781 cnt = i = 0; 782 783 /* 784 * For NFS Version 2, it is not obvious what a write of zero length 785 * should do, but I might as well be consistent with Version 3, 786 * which is to return ok so long as there are no permission problems. 787 */ 788 if (len > 0) { 789 zeroing = 1; 790 mp = mrep; 791 while (mp) { 792 if (mp == md) { 793 zeroing = 0; 794 adjust = dpos - mtod(mp, caddr_t); 795 mp->m_len -= adjust; 796 if (mp->m_len > 0 && adjust > 0) 797 NFSMADV(mp, adjust); 798 } 799 if (zeroing) 800 mp->m_len = 0; 801 else if (mp->m_len > 0) { 802 i += mp->m_len; 803 if (i > len) { 804 mp->m_len -= (i - len); 805 zeroing = 1; 806 } 807 if (mp->m_len > 0) 808 cnt++; 809 } 810 mp = mp->m_next; 811 } 812 } 813 if (len > NFS_MAXDATA || len < 0 || i < len) { 814 error = EIO; 815 nfsm_reply(2 * NFSX_UNSIGNED); 816 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 817 return (0); 818 } 819 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 820 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 821 if (error) { 822 nfsm_reply(2 * NFSX_UNSIGNED); 823 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 824 return (0); 825 } 826 if (v3) 827 forat_ret = VOP_GETATTR(vp, &forat, cred, procp); 828 if (vp->v_type != VREG) { 829 if (v3) 830 error = EINVAL; 831 else 832 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 833 } 834 if (!error) { 835 nqsrv_getl(vp, ND_WRITE); 836 error = nfsrv_access(vp, VWRITE, cred, rdonly, procp, 1); 837 } 838 if (error) { 839 vput(vp); 840 nfsm_reply(NFSX_WCCDATA(v3)); 841 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 842 return (0); 843 } 844 845 if (len > 0) { 846 ivp = malloc(cnt * sizeof (struct iovec), M_TEMP, M_WAITOK); 847 uiop->uio_iov = iv = ivp; 848 uiop->uio_iovcnt = cnt; 849 mp = mrep; 850 while (mp) { 851 if (mp->m_len > 0) { 852 ivp->iov_base = mtod(mp, caddr_t); 853 ivp->iov_len = mp->m_len; 854 ivp++; 855 } 856 mp = mp->m_next; 857 } 858 859 /* 860 * XXX 861 * The IO_METASYNC flag indicates that all metadata (and not just 862 * enough to ensure data integrity) mus be written to stable storage 863 * synchronously. 864 * (IO_METASYNC is not yet implemented in 4.4BSD-Lite.) 865 */ 866 if (stable == NFSV3WRITE_UNSTABLE) 867 ioflags = IO_NODELOCKED; 868 else if (stable == NFSV3WRITE_DATASYNC) 869 ioflags = (IO_SYNC | IO_NODELOCKED); 870 else 871 ioflags = (IO_METASYNC | IO_SYNC | IO_NODELOCKED); 872 uiop->uio_resid = len; 873 uiop->uio_rw = UIO_WRITE; 874 uiop->uio_segflg = UIO_SYSSPACE; 875 uiop->uio_procp = (struct proc *)0; 876 uiop->uio_offset = off; 877 error = VOP_WRITE(vp, uiop, ioflags, cred); 878 nfsstats.srvvop_writes++; 879 free((caddr_t)iv, M_TEMP); 880 } 881 aftat_ret = VOP_GETATTR(vp, &va, cred, procp); 882 vput(vp); 883 if (!error) 884 error = aftat_ret; 885 nfsm_reply(NFSX_PREOPATTR(v3) + NFSX_POSTOPORFATTR(v3) + 886 2 * NFSX_UNSIGNED + NFSX_WRITEVERF(v3)); 887 if (v3) { 888 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 889 if (error) 890 return (0); 891 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 892 *tl++ = txdr_unsigned(retlen); 893 if (stable == NFSV3WRITE_UNSTABLE) 894 *tl++ = txdr_unsigned(stable); 895 else 896 *tl++ = txdr_unsigned(NFSV3WRITE_FILESYNC); 897 /* 898 * Actually, there is no need to txdr these fields, 899 * but it may make the values more human readable, 900 * for debugging purposes. 901 */ 902 *tl++ = txdr_unsigned(boottime.tv_sec); 903 *tl = txdr_unsigned(boottime.tv_usec); 904 } else { 905 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 906 nfsm_srvfillattr(&va, fp); 907 } 908 nfsm_srvdone; 909 } 910 911 /* 912 * NFS write service with write gathering support. Called when 913 * nfsrvw_procrastinate > 0. 914 * See: Chet Juszczak, "Improving the Write Performance of an NFS Server", 915 * in Proc. of the Winter 1994 Usenix Conference, pg. 247-259, San Franscisco, 916 * Jan. 1994. 917 */ 918 int 919 nfsrv_writegather(ndp, slp, procp, mrq) 920 struct nfsrv_descript **ndp; 921 struct nfssvc_sock *slp; 922 struct proc *procp; 923 struct mbuf **mrq; 924 { 925 struct iovec *ivp; 926 struct mbuf *mp; 927 struct nfsrv_descript *wp, *nfsd, *owp, *swp; 928 struct nfs_fattr *fp; 929 int i = 0; 930 struct iovec *iov; 931 struct nfsrvw_delayhash *wpp; 932 struct ucred *cred; 933 struct vattr va, forat; 934 u_int32_t *tl; 935 int32_t t1; 936 caddr_t bpos, dpos; 937 int error = 0, rdonly, cache, len = 0, forat_ret = 1; 938 int ioflags, aftat_ret = 1, s, adjust, v3, zeroing; 939 char *cp2; 940 struct mbuf *mb, *mb2, *mreq, *mrep, *md; 941 struct vnode *vp; 942 struct uio io, *uiop = &io; 943 u_quad_t frev, cur_usec; 944 945 *mrq = NULL; 946 if (*ndp) { 947 nfsd = *ndp; 948 *ndp = NULL; 949 mrep = nfsd->nd_mrep; 950 md = nfsd->nd_md; 951 dpos = nfsd->nd_dpos; 952 cred = &nfsd->nd_cr; 953 v3 = (nfsd->nd_flag & ND_NFSV3); 954 LIST_INIT(&nfsd->nd_coalesce); 955 nfsd->nd_mreq = NULL; 956 nfsd->nd_stable = NFSV3WRITE_FILESYNC; 957 cur_usec = (u_quad_t)time.tv_sec * 1000000 + (u_quad_t)time.tv_usec; 958 nfsd->nd_time = cur_usec + nfsrvw_procrastinate; 959 960 /* 961 * Now, get the write header.. 962 */ 963 nfsm_srvmtofh(&nfsd->nd_fh); 964 if (v3) { 965 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 966 nfsd->nd_off = fxdr_hyper(tl); 967 tl += 3; 968 nfsd->nd_stable = fxdr_unsigned(int, *tl++); 969 } else { 970 nfsm_dissect(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 971 nfsd->nd_off = (off_t)fxdr_unsigned(u_int32_t, *++tl); 972 tl += 2; 973 } 974 len = fxdr_unsigned(int32_t, *tl); 975 nfsd->nd_len = len; 976 nfsd->nd_eoff = nfsd->nd_off + len; 977 978 /* 979 * Trim the header out of the mbuf list and trim off any trailing 980 * junk so that the mbuf list has only the write data. 981 */ 982 zeroing = 1; 983 i = 0; 984 mp = mrep; 985 while (mp) { 986 if (mp == md) { 987 zeroing = 0; 988 adjust = dpos - mtod(mp, caddr_t); 989 mp->m_len -= adjust; 990 if (mp->m_len > 0 && adjust > 0) 991 NFSMADV(mp, adjust); 992 } 993 if (zeroing) 994 mp->m_len = 0; 995 else { 996 i += mp->m_len; 997 if (i > len) { 998 mp->m_len -= (i - len); 999 zeroing = 1; 1000 } 1001 } 1002 mp = mp->m_next; 1003 } 1004 if (len > NFS_MAXDATA || len < 0 || i < len) { 1005 nfsmout: 1006 m_freem(mrep); 1007 error = EIO; 1008 nfsm_writereply(2 * NFSX_UNSIGNED, v3); 1009 if (v3) 1010 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1011 nfsd->nd_mreq = mreq; 1012 nfsd->nd_mrep = NULL; 1013 nfsd->nd_time = 0; 1014 } 1015 1016 /* 1017 * Add this entry to the hash and time queues. 1018 */ 1019 s = splsoftclock(); 1020 owp = NULL; 1021 wp = slp->ns_tq.lh_first; 1022 while (wp && wp->nd_time < nfsd->nd_time) { 1023 owp = wp; 1024 wp = wp->nd_tq.le_next; 1025 } 1026 if (owp) { 1027 LIST_INSERT_AFTER(owp, nfsd, nd_tq); 1028 } else { 1029 LIST_INSERT_HEAD(&slp->ns_tq, nfsd, nd_tq); 1030 } 1031 if (nfsd->nd_mrep) { 1032 wpp = NWDELAYHASH(slp, nfsd->nd_fh.fh_fid.fid_data); 1033 owp = NULL; 1034 wp = wpp->lh_first; 1035 while (wp && 1036 memcmp((caddr_t)&nfsd->nd_fh, (caddr_t)&wp->nd_fh, NFSX_V3FH)) { 1037 owp = wp; 1038 wp = wp->nd_hash.le_next; 1039 } 1040 while (wp && wp->nd_off < nfsd->nd_off && 1041 !memcmp((caddr_t)&nfsd->nd_fh, (caddr_t)&wp->nd_fh, NFSX_V3FH)) { 1042 owp = wp; 1043 wp = wp->nd_hash.le_next; 1044 } 1045 if (owp) { 1046 LIST_INSERT_AFTER(owp, nfsd, nd_hash); 1047 1048 /* 1049 * Search the hash list for overlapping entries and 1050 * coalesce. 1051 */ 1052 for(; nfsd && NFSW_CONTIG(owp, nfsd); nfsd = wp) { 1053 wp = nfsd->nd_hash.le_next; 1054 if (NFSW_SAMECRED(owp, nfsd)) 1055 nfsrvw_coalesce(owp, nfsd); 1056 } 1057 } else { 1058 LIST_INSERT_HEAD(wpp, nfsd, nd_hash); 1059 } 1060 } 1061 splx(s); 1062 } 1063 1064 /* 1065 * Now, do VOP_WRITE()s for any one(s) that need to be done now 1066 * and generate the associated reply mbuf list(s). 1067 */ 1068 loop1: 1069 cur_usec = (u_quad_t)time.tv_sec * 1000000 + (u_quad_t)time.tv_usec; 1070 s = splsoftclock(); 1071 for (nfsd = slp->ns_tq.lh_first; nfsd; nfsd = owp) { 1072 owp = nfsd->nd_tq.le_next; 1073 if (nfsd->nd_time > cur_usec) 1074 break; 1075 if (nfsd->nd_mreq) 1076 continue; 1077 LIST_REMOVE(nfsd, nd_tq); 1078 LIST_REMOVE(nfsd, nd_hash); 1079 splx(s); 1080 mrep = nfsd->nd_mrep; 1081 nfsd->nd_mrep = NULL; 1082 cred = &nfsd->nd_cr; 1083 v3 = (nfsd->nd_flag & ND_NFSV3); 1084 forat_ret = aftat_ret = 1; 1085 error = nfsrv_fhtovp(&nfsd->nd_fh, 1, &vp, cred, slp, 1086 nfsd->nd_nam, &rdonly, (nfsd->nd_flag & ND_KERBAUTH), 1087 FALSE); 1088 if (!error) { 1089 if (v3) 1090 forat_ret = VOP_GETATTR(vp, &forat, cred, procp); 1091 if (vp->v_type != VREG) { 1092 if (v3) 1093 error = EINVAL; 1094 else 1095 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 1096 } 1097 } else 1098 vp = NULL; 1099 if (!error) { 1100 nqsrv_getl(vp, ND_WRITE); 1101 error = nfsrv_access(vp, VWRITE, cred, rdonly, procp, 1); 1102 } 1103 1104 if (nfsd->nd_stable == NFSV3WRITE_UNSTABLE) 1105 ioflags = IO_NODELOCKED; 1106 else if (nfsd->nd_stable == NFSV3WRITE_DATASYNC) 1107 ioflags = (IO_SYNC | IO_NODELOCKED); 1108 else 1109 ioflags = (IO_METASYNC | IO_SYNC | IO_NODELOCKED); 1110 uiop->uio_rw = UIO_WRITE; 1111 uiop->uio_segflg = UIO_SYSSPACE; 1112 uiop->uio_procp = (struct proc *)0; 1113 uiop->uio_offset = nfsd->nd_off; 1114 uiop->uio_resid = nfsd->nd_eoff - nfsd->nd_off; 1115 if (uiop->uio_resid > 0) { 1116 mp = mrep; 1117 i = 0; 1118 while (mp) { 1119 if (mp->m_len > 0) 1120 i++; 1121 mp = mp->m_next; 1122 } 1123 uiop->uio_iovcnt = i; 1124 iov = malloc(i * sizeof (struct iovec), M_TEMP, M_WAITOK); 1125 uiop->uio_iov = ivp = iov; 1126 mp = mrep; 1127 while (mp) { 1128 if (mp->m_len > 0) { 1129 ivp->iov_base = mtod(mp, caddr_t); 1130 ivp->iov_len = mp->m_len; 1131 ivp++; 1132 } 1133 mp = mp->m_next; 1134 } 1135 if (!error) { 1136 error = VOP_WRITE(vp, uiop, ioflags, cred); 1137 nfsstats.srvvop_writes++; 1138 } 1139 free((caddr_t)iov, M_TEMP); 1140 } 1141 m_freem(mrep); 1142 if (vp) { 1143 aftat_ret = VOP_GETATTR(vp, &va, cred, procp); 1144 vput(vp); 1145 } 1146 1147 /* 1148 * Loop around generating replies for all write rpcs that have 1149 * now been completed. 1150 */ 1151 swp = nfsd; 1152 do { 1153 if (error) { 1154 nfsm_writereply(NFSX_WCCDATA(v3), v3); 1155 if (v3) { 1156 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1157 } 1158 } else { 1159 nfsm_writereply(NFSX_PREOPATTR(v3) + 1160 NFSX_POSTOPORFATTR(v3) + 2 * NFSX_UNSIGNED + 1161 NFSX_WRITEVERF(v3), v3); 1162 if (v3) { 1163 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1164 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1165 *tl++ = txdr_unsigned(nfsd->nd_len); 1166 *tl++ = txdr_unsigned(swp->nd_stable); 1167 /* 1168 * Actually, there is no need to txdr these fields, 1169 * but it may make the values more human readable, 1170 * for debugging purposes. 1171 */ 1172 *tl++ = txdr_unsigned(boottime.tv_sec); 1173 *tl = txdr_unsigned(boottime.tv_usec); 1174 } else { 1175 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 1176 nfsm_srvfillattr(&va, fp); 1177 } 1178 } 1179 nfsd->nd_mreq = mreq; 1180 if (nfsd->nd_mrep) 1181 panic("nfsrv_write: nd_mrep not free"); 1182 1183 /* 1184 * Done. Put it at the head of the timer queue so that 1185 * the final phase can return the reply. 1186 */ 1187 s = splsoftclock(); 1188 if (nfsd != swp) { 1189 nfsd->nd_time = 0; 1190 LIST_INSERT_HEAD(&slp->ns_tq, nfsd, nd_tq); 1191 } 1192 nfsd = swp->nd_coalesce.lh_first; 1193 if (nfsd) { 1194 LIST_REMOVE(nfsd, nd_tq); 1195 } 1196 splx(s); 1197 } while (nfsd); 1198 s = splsoftclock(); 1199 swp->nd_time = 0; 1200 LIST_INSERT_HEAD(&slp->ns_tq, swp, nd_tq); 1201 splx(s); 1202 goto loop1; 1203 } 1204 splx(s); 1205 1206 /* 1207 * Search for a reply to return. 1208 */ 1209 s = splsoftclock(); 1210 for (nfsd = slp->ns_tq.lh_first; nfsd; nfsd = nfsd->nd_tq.le_next) 1211 if (nfsd->nd_mreq) { 1212 LIST_REMOVE(nfsd, nd_tq); 1213 *mrq = nfsd->nd_mreq; 1214 *ndp = nfsd; 1215 break; 1216 } 1217 splx(s); 1218 return (0); 1219 } 1220 1221 /* 1222 * Coalesce the write request nfsd into owp. To do this we must: 1223 * - remove nfsd from the queues 1224 * - merge nfsd->nd_mrep into owp->nd_mrep 1225 * - update the nd_eoff and nd_stable for owp 1226 * - put nfsd on owp's nd_coalesce list 1227 * NB: Must be called at splsoftclock(). 1228 */ 1229 void 1230 nfsrvw_coalesce(owp, nfsd) 1231 struct nfsrv_descript *owp; 1232 struct nfsrv_descript *nfsd; 1233 { 1234 int overlap; 1235 struct mbuf *mp; 1236 1237 LIST_REMOVE(nfsd, nd_hash); 1238 LIST_REMOVE(nfsd, nd_tq); 1239 if (owp->nd_eoff < nfsd->nd_eoff) { 1240 overlap = owp->nd_eoff - nfsd->nd_off; 1241 if (overlap < 0) 1242 panic("nfsrv_coalesce: bad off"); 1243 if (overlap > 0) 1244 m_adj(nfsd->nd_mrep, overlap); 1245 mp = owp->nd_mrep; 1246 while (mp->m_next) 1247 mp = mp->m_next; 1248 mp->m_next = nfsd->nd_mrep; 1249 owp->nd_eoff = nfsd->nd_eoff; 1250 } else 1251 m_freem(nfsd->nd_mrep); 1252 nfsd->nd_mrep = NULL; 1253 if (nfsd->nd_stable == NFSV3WRITE_FILESYNC) 1254 owp->nd_stable = NFSV3WRITE_FILESYNC; 1255 else if (nfsd->nd_stable == NFSV3WRITE_DATASYNC && 1256 owp->nd_stable == NFSV3WRITE_UNSTABLE) 1257 owp->nd_stable = NFSV3WRITE_DATASYNC; 1258 LIST_INSERT_HEAD(&owp->nd_coalesce, nfsd, nd_tq); 1259 /* 1260 * nfsd might hold coalesce elements! Move them to owp. 1261 * Otherwise, requests may be lost and clients will be stuck. 1262 */ 1263 if (nfsd->nd_coalesce.lh_first) 1264 { 1265 struct nfsrv_descript *m; 1266 1267 while ((m = nfsd->nd_coalesce.lh_first)) 1268 { 1269 LIST_REMOVE(m, nd_tq); 1270 LIST_INSERT_HEAD(&owp->nd_coalesce, m, nd_tq); 1271 } 1272 } 1273 } 1274 1275 /* 1276 * nfs create service 1277 * now does a truncate to 0 length via. setattr if it already exists 1278 */ 1279 int 1280 nfsrv_create(nfsd, slp, procp, mrq) 1281 struct nfsrv_descript *nfsd; 1282 struct nfssvc_sock *slp; 1283 struct proc *procp; 1284 struct mbuf **mrq; 1285 { 1286 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1287 struct mbuf *nam = nfsd->nd_nam; 1288 caddr_t dpos = nfsd->nd_dpos; 1289 struct ucred *cred = &nfsd->nd_cr; 1290 struct nfs_fattr *fp; 1291 struct vattr va, dirfor, diraft; 1292 struct nfsv2_sattr *sp; 1293 u_int32_t *tl; 1294 struct nameidata nd; 1295 caddr_t cp; 1296 int32_t t1; 1297 caddr_t bpos; 1298 int error = 0, cache, len, tsize, dirfor_ret = 1, diraft_ret = 1; 1299 int rdev = 0; 1300 int v3 = (nfsd->nd_flag & ND_NFSV3), how, exclusive_flag = 0; 1301 char *cp2; 1302 struct mbuf *mb, *mb2, *mreq; 1303 struct vnode *vp = NULL, *dirp = NULL; 1304 nfsfh_t nfh; 1305 fhandle_t *fhp; 1306 u_quad_t frev, tempsize; 1307 u_char cverf[NFSX_V3CREATEVERF]; 1308 1309 nd.ni_cnd.cn_nameiop = 0; 1310 fhp = &nfh.fh_generic; 1311 nfsm_srvmtofh(fhp); 1312 nfsm_srvnamesiz(len); 1313 nd.ni_cnd.cn_cred = cred; 1314 nd.ni_cnd.cn_nameiop = CREATE; 1315 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF | SAVESTART; 1316 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 1317 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1318 if (dirp) { 1319 if (v3) 1320 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 1321 procp); 1322 else { 1323 vrele(dirp); 1324 dirp = (struct vnode *)0; 1325 } 1326 } 1327 if (error) { 1328 nfsm_reply(NFSX_WCCDATA(v3)); 1329 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1330 if (dirp) 1331 vrele(dirp); 1332 return (0); 1333 } 1334 VATTR_NULL(&va); 1335 if (v3) { 1336 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1337 how = fxdr_unsigned(int, *tl); 1338 switch (how) { 1339 case NFSV3CREATE_GUARDED: 1340 if (nd.ni_vp) { 1341 error = EEXIST; 1342 break; 1343 } 1344 case NFSV3CREATE_UNCHECKED: 1345 nfsm_srvsattr(&va); 1346 break; 1347 case NFSV3CREATE_EXCLUSIVE: 1348 nfsm_dissect(cp, caddr_t, NFSX_V3CREATEVERF); 1349 memcpy(cverf, cp, NFSX_V3CREATEVERF); 1350 exclusive_flag = 1; 1351 if (nd.ni_vp == NULL) 1352 va.va_mode = 0; 1353 break; 1354 }; 1355 va.va_type = VREG; 1356 } else { 1357 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1358 va.va_type = IFTOVT(fxdr_unsigned(u_int32_t, sp->sa_mode)); 1359 if (va.va_type == VNON) 1360 va.va_type = VREG; 1361 va.va_mode = nfstov_mode(sp->sa_mode); 1362 switch (va.va_type) { 1363 case VREG: 1364 tsize = fxdr_unsigned(int32_t, sp->sa_size); 1365 if (tsize != -1) 1366 va.va_size = (u_quad_t)tsize; 1367 break; 1368 case VCHR: 1369 case VBLK: 1370 case VFIFO: 1371 rdev = fxdr_unsigned(int32_t, sp->sa_size); 1372 break; 1373 default: 1374 break; 1375 }; 1376 } 1377 1378 /* 1379 * Iff doesn't exist, create it 1380 * otherwise just truncate to 0 length 1381 * should I set the mode too ?? 1382 */ 1383 if (nd.ni_vp == NULL) { 1384 if (va.va_type == VREG || va.va_type == VSOCK) { 1385 vrele(nd.ni_startdir); 1386 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1387 error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1388 if (!error) { 1389 PNBUF_PUT(nd.ni_cnd.cn_pnbuf); 1390 if (exclusive_flag) { 1391 exclusive_flag = 0; 1392 VATTR_NULL(&va); 1393 memcpy((caddr_t)&va.va_atime, cverf, 1394 NFSX_V3CREATEVERF); 1395 error = VOP_SETATTR(nd.ni_vp, &va, cred, 1396 procp); 1397 } 1398 } 1399 } else if (va.va_type == VCHR || va.va_type == VBLK || 1400 va.va_type == VFIFO) { 1401 if (va.va_type == VCHR && rdev == 0xffffffff) 1402 va.va_type = VFIFO; 1403 if (va.va_type != VFIFO && 1404 (error = suser(cred, (u_short *)0))) { 1405 vrele(nd.ni_startdir); 1406 PNBUF_PUT(nd.ni_cnd.cn_pnbuf); 1407 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1408 vput(nd.ni_dvp); 1409 nfsm_reply(0); 1410 return (error); 1411 } else 1412 va.va_rdev = (dev_t)rdev; 1413 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1414 error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, 1415 &va); 1416 if (error) { 1417 vrele(nd.ni_startdir); 1418 nfsm_reply(0); 1419 } 1420 nd.ni_cnd.cn_nameiop = LOOKUP; 1421 nd.ni_cnd.cn_flags &= ~(LOCKPARENT | SAVESTART); 1422 nd.ni_cnd.cn_proc = procp; 1423 nd.ni_cnd.cn_cred = cred; 1424 if ((error = lookup(&nd)) != 0) { 1425 PNBUF_PUT(nd.ni_cnd.cn_pnbuf); 1426 nfsm_reply(0); 1427 } 1428 PNBUF_PUT(nd.ni_cnd.cn_pnbuf); 1429 if (nd.ni_cnd.cn_flags & ISSYMLINK) { 1430 vrele(nd.ni_dvp); 1431 vput(nd.ni_vp); 1432 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1433 error = EINVAL; 1434 nfsm_reply(0); 1435 } 1436 } else { 1437 vrele(nd.ni_startdir); 1438 PNBUF_PUT(nd.ni_cnd.cn_pnbuf); 1439 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1440 vput(nd.ni_dvp); 1441 error = ENXIO; 1442 } 1443 vp = nd.ni_vp; 1444 } else { 1445 vrele(nd.ni_startdir); 1446 PNBUF_PUT(nd.ni_cnd.cn_pnbuf); 1447 vp = nd.ni_vp; 1448 if (nd.ni_dvp == vp) 1449 vrele(nd.ni_dvp); 1450 else 1451 vput(nd.ni_dvp); 1452 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1453 if (!error && va.va_size != -1) { 1454 error = nfsrv_access(vp, VWRITE, cred, 1455 (nd.ni_cnd.cn_flags & RDONLY), procp, 0); 1456 if (!error) { 1457 nqsrv_getl(vp, ND_WRITE); 1458 tempsize = va.va_size; 1459 VATTR_NULL(&va); 1460 va.va_size = tempsize; 1461 error = VOP_SETATTR(vp, &va, cred, 1462 procp); 1463 } 1464 } 1465 if (error) 1466 vput(vp); 1467 } 1468 if (!error) { 1469 memset((caddr_t)fhp, 0, sizeof(nfh)); 1470 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; 1471 error = VFS_VPTOFH(vp, &fhp->fh_fid); 1472 if (!error) 1473 error = VOP_GETATTR(vp, &va, cred, procp); 1474 vput(vp); 1475 } 1476 if (v3) { 1477 if (exclusive_flag && !error && 1478 memcmp(cverf, (caddr_t)&va.va_atime, NFSX_V3CREATEVERF)) 1479 error = EEXIST; 1480 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 1481 vrele(dirp); 1482 } 1483 nfsm_reply(NFSX_SRVFH(v3) + NFSX_FATTR(v3) + NFSX_WCCDATA(v3)); 1484 if (v3) { 1485 if (!error) { 1486 nfsm_srvpostop_fh(fhp); 1487 nfsm_srvpostop_attr(0, &va); 1488 } 1489 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1490 } else { 1491 nfsm_srvfhtom(fhp, v3); 1492 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 1493 nfsm_srvfillattr(&va, fp); 1494 } 1495 return (0); 1496 nfsmout: 1497 if (dirp) 1498 vrele(dirp); 1499 if (nd.ni_cnd.cn_nameiop) { 1500 vrele(nd.ni_startdir); 1501 PNBUF_PUT(nd.ni_cnd.cn_pnbuf); 1502 } 1503 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1504 if (nd.ni_dvp == nd.ni_vp) 1505 vrele(nd.ni_dvp); 1506 else 1507 vput(nd.ni_dvp); 1508 if (nd.ni_vp) 1509 vput(nd.ni_vp); 1510 return (error); 1511 } 1512 1513 /* 1514 * nfs v3 mknod service 1515 */ 1516 int 1517 nfsrv_mknod(nfsd, slp, procp, mrq) 1518 struct nfsrv_descript *nfsd; 1519 struct nfssvc_sock *slp; 1520 struct proc *procp; 1521 struct mbuf **mrq; 1522 { 1523 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1524 struct mbuf *nam = nfsd->nd_nam; 1525 caddr_t dpos = nfsd->nd_dpos; 1526 struct ucred *cred = &nfsd->nd_cr; 1527 struct vattr va, dirfor, diraft; 1528 u_int32_t *tl; 1529 struct nameidata nd; 1530 int32_t t1; 1531 caddr_t bpos; 1532 int error = 0, cache, len, dirfor_ret = 1, diraft_ret = 1; 1533 u_int32_t major, minor; 1534 enum vtype vtyp; 1535 char *cp2; 1536 struct mbuf *mb, *mb2, *mreq; 1537 struct vnode *vp, *dirp = (struct vnode *)0; 1538 nfsfh_t nfh; 1539 fhandle_t *fhp; 1540 u_quad_t frev; 1541 1542 nd.ni_cnd.cn_nameiop = 0; 1543 fhp = &nfh.fh_generic; 1544 nfsm_srvmtofh(fhp); 1545 nfsm_srvnamesiz(len); 1546 nd.ni_cnd.cn_cred = cred; 1547 nd.ni_cnd.cn_nameiop = CREATE; 1548 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF | SAVESTART; 1549 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 1550 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1551 if (dirp) 1552 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, procp); 1553 if (error) { 1554 nfsm_reply(NFSX_WCCDATA(1)); 1555 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1556 if (dirp) 1557 vrele(dirp); 1558 return (0); 1559 } 1560 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1561 vtyp = nfsv3tov_type(*tl); 1562 if (vtyp != VCHR && vtyp != VBLK && vtyp != VSOCK && vtyp != VFIFO) { 1563 vrele(nd.ni_startdir); 1564 PNBUF_PUT(nd.ni_cnd.cn_pnbuf); 1565 error = NFSERR_BADTYPE; 1566 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1567 if (nd.ni_dvp == nd.ni_vp) 1568 vrele(nd.ni_dvp); 1569 else 1570 vput(nd.ni_dvp); 1571 if (nd.ni_vp) 1572 vput(nd.ni_vp); 1573 goto out; 1574 } 1575 VATTR_NULL(&va); 1576 nfsm_srvsattr(&va); 1577 if (vtyp == VCHR || vtyp == VBLK) { 1578 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1579 major = fxdr_unsigned(u_int32_t, *tl++); 1580 minor = fxdr_unsigned(u_int32_t, *tl); 1581 va.va_rdev = makedev(major, minor); 1582 } 1583 1584 /* 1585 * Iff doesn't exist, create it. 1586 */ 1587 if (nd.ni_vp) { 1588 vrele(nd.ni_startdir); 1589 PNBUF_PUT(nd.ni_cnd.cn_pnbuf); 1590 error = EEXIST; 1591 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1592 if (nd.ni_dvp == nd.ni_vp) 1593 vrele(nd.ni_dvp); 1594 else 1595 vput(nd.ni_dvp); 1596 vput(nd.ni_vp); 1597 goto out; 1598 } 1599 va.va_type = vtyp; 1600 if (vtyp == VSOCK) { 1601 vrele(nd.ni_startdir); 1602 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1603 error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1604 if (!error) 1605 PNBUF_PUT(nd.ni_cnd.cn_pnbuf); 1606 } else { 1607 if (va.va_type != VFIFO && 1608 (error = suser(cred, (u_short *)0))) { 1609 vrele(nd.ni_startdir); 1610 PNBUF_PUT(nd.ni_cnd.cn_pnbuf); 1611 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1612 vput(nd.ni_dvp); 1613 goto out; 1614 } 1615 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1616 error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1617 if (error) { 1618 vrele(nd.ni_startdir); 1619 goto out; 1620 } 1621 nd.ni_cnd.cn_nameiop = LOOKUP; 1622 nd.ni_cnd.cn_flags &= ~(LOCKPARENT | SAVESTART); 1623 nd.ni_cnd.cn_proc = procp; 1624 nd.ni_cnd.cn_cred = procp->p_ucred; 1625 error = lookup(&nd); 1626 PNBUF_PUT(nd.ni_cnd.cn_pnbuf); 1627 if (error) 1628 goto out; 1629 if (nd.ni_cnd.cn_flags & ISSYMLINK) { 1630 vrele(nd.ni_dvp); 1631 vput(nd.ni_vp); 1632 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1633 error = EINVAL; 1634 } 1635 } 1636 out: 1637 vp = nd.ni_vp; 1638 if (!error) { 1639 memset((caddr_t)fhp, 0, sizeof(nfh)); 1640 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; 1641 error = VFS_VPTOFH(vp, &fhp->fh_fid); 1642 if (!error) 1643 error = VOP_GETATTR(vp, &va, cred, procp); 1644 vput(vp); 1645 } 1646 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 1647 vrele(dirp); 1648 nfsm_reply(NFSX_SRVFH(1) + NFSX_POSTOPATTR(1) + NFSX_WCCDATA(1)); 1649 if (!error) { 1650 nfsm_srvpostop_fh(fhp); 1651 nfsm_srvpostop_attr(0, &va); 1652 } 1653 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1654 return (0); 1655 nfsmout: 1656 if (dirp) 1657 vrele(dirp); 1658 if (nd.ni_cnd.cn_nameiop) { 1659 vrele(nd.ni_startdir); 1660 PNBUF_PUT(nd.ni_cnd.cn_pnbuf); 1661 } 1662 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1663 if (nd.ni_dvp == nd.ni_vp) 1664 vrele(nd.ni_dvp); 1665 else 1666 vput(nd.ni_dvp); 1667 if (nd.ni_vp) 1668 vput(nd.ni_vp); 1669 return (error); 1670 } 1671 1672 /* 1673 * nfs remove service 1674 */ 1675 int 1676 nfsrv_remove(nfsd, slp, procp, mrq) 1677 struct nfsrv_descript *nfsd; 1678 struct nfssvc_sock *slp; 1679 struct proc *procp; 1680 struct mbuf **mrq; 1681 { 1682 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1683 struct mbuf *nam = nfsd->nd_nam; 1684 caddr_t dpos = nfsd->nd_dpos; 1685 struct ucred *cred = &nfsd->nd_cr; 1686 struct nameidata nd; 1687 u_int32_t *tl; 1688 int32_t t1; 1689 caddr_t bpos; 1690 int error = 0, cache, len, dirfor_ret = 1, diraft_ret = 1; 1691 int v3 = (nfsd->nd_flag & ND_NFSV3); 1692 char *cp2; 1693 struct mbuf *mb, *mreq; 1694 struct vnode *vp, *dirp; 1695 struct vattr dirfor, diraft; 1696 nfsfh_t nfh; 1697 fhandle_t *fhp; 1698 u_quad_t frev; 1699 1700 #ifndef nolint 1701 vp = (struct vnode *)0; 1702 #endif 1703 fhp = &nfh.fh_generic; 1704 nfsm_srvmtofh(fhp); 1705 nfsm_srvnamesiz(len); 1706 nd.ni_cnd.cn_cred = cred; 1707 nd.ni_cnd.cn_nameiop = DELETE; 1708 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 1709 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 1710 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1711 if (dirp) { 1712 if (v3) 1713 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 1714 procp); 1715 else 1716 vrele(dirp); 1717 } 1718 if (!error) { 1719 vp = nd.ni_vp; 1720 if (vp->v_type == VDIR && 1721 (error = suser(cred, (u_short *)0)) != 0) 1722 goto out; 1723 /* 1724 * The root of a mounted filesystem cannot be deleted. 1725 */ 1726 if (vp->v_flag & VROOT) { 1727 error = EBUSY; 1728 goto out; 1729 } 1730 out: 1731 if (!error) { 1732 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1733 nqsrv_getl(vp, ND_WRITE); 1734 error = VOP_REMOVE(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); 1735 } else { 1736 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1737 if (nd.ni_dvp == vp) 1738 vrele(nd.ni_dvp); 1739 else 1740 vput(nd.ni_dvp); 1741 vput(vp); 1742 } 1743 } 1744 if (dirp && v3) { 1745 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 1746 vrele(dirp); 1747 } 1748 nfsm_reply(NFSX_WCCDATA(v3)); 1749 if (v3) { 1750 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1751 return (0); 1752 } 1753 nfsm_srvdone; 1754 } 1755 1756 /* 1757 * nfs rename service 1758 */ 1759 int 1760 nfsrv_rename(nfsd, slp, procp, mrq) 1761 struct nfsrv_descript *nfsd; 1762 struct nfssvc_sock *slp; 1763 struct proc *procp; 1764 struct mbuf **mrq; 1765 { 1766 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1767 struct mbuf *nam = nfsd->nd_nam; 1768 caddr_t dpos = nfsd->nd_dpos; 1769 struct ucred *cred = &nfsd->nd_cr; 1770 u_int32_t *tl; 1771 int32_t t1; 1772 caddr_t bpos; 1773 int error = 0, cache, len, len2, fdirfor_ret = 1, fdiraft_ret = 1; 1774 int tdirfor_ret = 1, tdiraft_ret = 1; 1775 int v3 = (nfsd->nd_flag & ND_NFSV3); 1776 char *cp2; 1777 struct mbuf *mb, *mreq; 1778 struct nameidata fromnd, tond; 1779 struct vnode *fvp, *tvp, *tdvp, *fdirp = (struct vnode *)0; 1780 struct vnode *tdirp = (struct vnode *)0; 1781 struct vattr fdirfor, fdiraft, tdirfor, tdiraft; 1782 nfsfh_t fnfh, tnfh; 1783 fhandle_t *ffhp, *tfhp; 1784 u_quad_t frev; 1785 uid_t saved_uid; 1786 1787 #ifndef nolint 1788 fvp = (struct vnode *)0; 1789 #endif 1790 ffhp = &fnfh.fh_generic; 1791 tfhp = &tnfh.fh_generic; 1792 fromnd.ni_cnd.cn_nameiop = 0; 1793 tond.ni_cnd.cn_nameiop = 0; 1794 nfsm_srvmtofh(ffhp); 1795 nfsm_srvnamesiz(len); 1796 /* 1797 * Remember our original uid so that we can reset cr_uid before 1798 * the second nfs_namei() call, in case it is remapped. 1799 */ 1800 saved_uid = cred->cr_uid; 1801 fromnd.ni_cnd.cn_cred = cred; 1802 fromnd.ni_cnd.cn_nameiop = DELETE; 1803 fromnd.ni_cnd.cn_flags = WANTPARENT | SAVESTART; 1804 error = nfs_namei(&fromnd, ffhp, len, slp, nam, &md, 1805 &dpos, &fdirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1806 if (fdirp) { 1807 if (v3) 1808 fdirfor_ret = VOP_GETATTR(fdirp, &fdirfor, cred, 1809 procp); 1810 else { 1811 vrele(fdirp); 1812 fdirp = (struct vnode *)0; 1813 } 1814 } 1815 if (error) { 1816 nfsm_reply(2 * NFSX_WCCDATA(v3)); 1817 nfsm_srvwcc_data(fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft); 1818 nfsm_srvwcc_data(tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft); 1819 if (fdirp) 1820 vrele(fdirp); 1821 return (0); 1822 } 1823 fvp = fromnd.ni_vp; 1824 nfsm_srvmtofh(tfhp); 1825 nfsm_strsiz(len2, NFS_MAXNAMLEN); 1826 cred->cr_uid = saved_uid; 1827 tond.ni_cnd.cn_cred = cred; 1828 tond.ni_cnd.cn_nameiop = RENAME; 1829 tond.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF | NOCACHE | SAVESTART; 1830 error = nfs_namei(&tond, tfhp, len2, slp, nam, &md, 1831 &dpos, &tdirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1832 if (tdirp) { 1833 if (v3) 1834 tdirfor_ret = VOP_GETATTR(tdirp, &tdirfor, cred, 1835 procp); 1836 else { 1837 vrele(tdirp); 1838 tdirp = (struct vnode *)0; 1839 } 1840 } 1841 if (error) { 1842 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 1843 vrele(fromnd.ni_dvp); 1844 vrele(fvp); 1845 goto out1; 1846 } 1847 tdvp = tond.ni_dvp; 1848 tvp = tond.ni_vp; 1849 if (tvp != NULL) { 1850 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 1851 if (v3) 1852 error = EEXIST; 1853 else 1854 error = EISDIR; 1855 goto out; 1856 } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 1857 if (v3) 1858 error = EEXIST; 1859 else 1860 error = ENOTDIR; 1861 goto out; 1862 } 1863 if (tvp->v_type == VDIR && tvp->v_mountedhere) { 1864 if (v3) 1865 error = EXDEV; 1866 else 1867 error = ENOTEMPTY; 1868 goto out; 1869 } 1870 } 1871 if (fvp->v_type == VDIR && fvp->v_mountedhere) { 1872 if (v3) 1873 error = EXDEV; 1874 else 1875 error = ENOTEMPTY; 1876 goto out; 1877 } 1878 if (fvp->v_mount != tdvp->v_mount) { 1879 if (v3) 1880 error = EXDEV; 1881 else 1882 error = ENOTEMPTY; 1883 goto out; 1884 } 1885 if (fvp == tdvp) { 1886 if (v3) 1887 error = EINVAL; 1888 else 1889 error = ENOTEMPTY; 1890 } 1891 /* 1892 * If source is the same as the destination (that is the 1893 * same vnode with the same name in the same directory), 1894 * then there is nothing to do. 1895 */ 1896 if (fvp == tvp && fromnd.ni_dvp == tdvp && 1897 fromnd.ni_cnd.cn_namelen == tond.ni_cnd.cn_namelen && 1898 !memcmp(fromnd.ni_cnd.cn_nameptr, tond.ni_cnd.cn_nameptr, 1899 fromnd.ni_cnd.cn_namelen)) 1900 error = -1; 1901 out: 1902 if (!error) { 1903 nqsrv_getl(fromnd.ni_dvp, ND_WRITE); 1904 nqsrv_getl(tdvp, ND_WRITE); 1905 if (tvp) { 1906 nqsrv_getl(tvp, ND_WRITE); 1907 } 1908 error = VOP_RENAME(fromnd.ni_dvp, fromnd.ni_vp, &fromnd.ni_cnd, 1909 tond.ni_dvp, tond.ni_vp, &tond.ni_cnd); 1910 } else { 1911 VOP_ABORTOP(tond.ni_dvp, &tond.ni_cnd); 1912 if (tdvp == tvp) 1913 vrele(tdvp); 1914 else 1915 vput(tdvp); 1916 if (tvp) 1917 vput(tvp); 1918 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 1919 vrele(fromnd.ni_dvp); 1920 vrele(fvp); 1921 if (error == -1) 1922 error = 0; 1923 } 1924 vrele(tond.ni_startdir); 1925 PNBUF_PUT(tond.ni_cnd.cn_pnbuf); 1926 out1: 1927 if (fdirp) { 1928 fdiraft_ret = VOP_GETATTR(fdirp, &fdiraft, cred, procp); 1929 vrele(fdirp); 1930 } 1931 if (tdirp) { 1932 tdiraft_ret = VOP_GETATTR(tdirp, &tdiraft, cred, procp); 1933 vrele(tdirp); 1934 } 1935 vrele(fromnd.ni_startdir); 1936 PNBUF_PUT(fromnd.ni_cnd.cn_pnbuf); 1937 nfsm_reply(2 * NFSX_WCCDATA(v3)); 1938 if (v3) { 1939 nfsm_srvwcc_data(fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft); 1940 nfsm_srvwcc_data(tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft); 1941 } 1942 return (0); 1943 1944 nfsmout: 1945 if (fdirp) 1946 vrele(fdirp); 1947 if (tdirp) 1948 vrele(tdirp); 1949 if (tond.ni_cnd.cn_nameiop) { 1950 vrele(tond.ni_startdir); 1951 PNBUF_PUT(tond.ni_cnd.cn_pnbuf); 1952 } 1953 if (fromnd.ni_cnd.cn_nameiop) { 1954 vrele(fromnd.ni_startdir); 1955 PNBUF_PUT(fromnd.ni_cnd.cn_pnbuf); 1956 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 1957 vrele(fromnd.ni_dvp); 1958 vrele(fvp); 1959 } 1960 return (error); 1961 } 1962 1963 /* 1964 * nfs link service 1965 */ 1966 int 1967 nfsrv_link(nfsd, slp, procp, mrq) 1968 struct nfsrv_descript *nfsd; 1969 struct nfssvc_sock *slp; 1970 struct proc *procp; 1971 struct mbuf **mrq; 1972 { 1973 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1974 struct mbuf *nam = nfsd->nd_nam; 1975 caddr_t dpos = nfsd->nd_dpos; 1976 struct ucred *cred = &nfsd->nd_cr; 1977 struct nameidata nd; 1978 u_int32_t *tl; 1979 int32_t t1; 1980 caddr_t bpos; 1981 int error = 0, rdonly, cache, len, dirfor_ret = 1, diraft_ret = 1; 1982 int getret = 1, v3 = (nfsd->nd_flag & ND_NFSV3); 1983 char *cp2; 1984 struct mbuf *mb, *mreq; 1985 struct vnode *vp, *xp, *dirp = (struct vnode *)0; 1986 struct vattr dirfor, diraft, at; 1987 nfsfh_t nfh, dnfh; 1988 fhandle_t *fhp, *dfhp; 1989 u_quad_t frev; 1990 1991 fhp = &nfh.fh_generic; 1992 dfhp = &dnfh.fh_generic; 1993 nfsm_srvmtofh(fhp); 1994 nfsm_srvmtofh(dfhp); 1995 nfsm_srvnamesiz(len); 1996 error = nfsrv_fhtovp(fhp, FALSE, &vp, cred, slp, nam, 1997 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1998 if (error) { 1999 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2000 nfsm_srvpostop_attr(getret, &at); 2001 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2002 return (0); 2003 } 2004 if (vp->v_type == VDIR && (error = suser(cred, (u_short *)0)) != 0) 2005 goto out1; 2006 nd.ni_cnd.cn_cred = cred; 2007 nd.ni_cnd.cn_nameiop = CREATE; 2008 nd.ni_cnd.cn_flags = LOCKPARENT; 2009 error = nfs_namei(&nd, dfhp, len, slp, nam, &md, &dpos, 2010 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2011 if (dirp) { 2012 if (v3) 2013 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 2014 procp); 2015 else { 2016 vrele(dirp); 2017 dirp = (struct vnode *)0; 2018 } 2019 } 2020 if (error) 2021 goto out1; 2022 xp = nd.ni_vp; 2023 if (xp != NULL) { 2024 error = EEXIST; 2025 goto out; 2026 } 2027 xp = nd.ni_dvp; 2028 if (vp->v_mount != xp->v_mount) 2029 error = EXDEV; 2030 out: 2031 if (!error) { 2032 nqsrv_getl(vp, ND_WRITE); 2033 nqsrv_getl(xp, ND_WRITE); 2034 error = VOP_LINK(nd.ni_dvp, vp, &nd.ni_cnd); 2035 } else { 2036 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2037 if (nd.ni_dvp == nd.ni_vp) 2038 vrele(nd.ni_dvp); 2039 else 2040 vput(nd.ni_dvp); 2041 if (nd.ni_vp) 2042 vrele(nd.ni_vp); 2043 } 2044 out1: 2045 if (v3) 2046 getret = VOP_GETATTR(vp, &at, cred, procp); 2047 if (dirp) { 2048 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 2049 vrele(dirp); 2050 } 2051 vrele(vp); 2052 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2053 if (v3) { 2054 nfsm_srvpostop_attr(getret, &at); 2055 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2056 return (0); 2057 } 2058 nfsm_srvdone; 2059 } 2060 2061 /* 2062 * nfs symbolic link service 2063 */ 2064 int 2065 nfsrv_symlink(nfsd, slp, procp, mrq) 2066 struct nfsrv_descript *nfsd; 2067 struct nfssvc_sock *slp; 2068 struct proc *procp; 2069 struct mbuf **mrq; 2070 { 2071 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2072 struct mbuf *nam = nfsd->nd_nam; 2073 caddr_t dpos = nfsd->nd_dpos; 2074 struct ucred *cred = &nfsd->nd_cr; 2075 struct vattr va, dirfor, diraft; 2076 struct nameidata nd; 2077 u_int32_t *tl; 2078 int32_t t1; 2079 struct nfsv2_sattr *sp; 2080 char *bpos, *pathcp = NULL, *cp2; 2081 struct uio io; 2082 struct iovec iv; 2083 int error = 0, cache, len, len2, dirfor_ret = 1, diraft_ret = 1; 2084 int v3 = (nfsd->nd_flag & ND_NFSV3); 2085 struct mbuf *mb, *mreq, *mb2; 2086 struct vnode *dirp = (struct vnode *)0; 2087 nfsfh_t nfh; 2088 fhandle_t *fhp; 2089 u_quad_t frev; 2090 2091 nd.ni_cnd.cn_nameiop = 0; 2092 fhp = &nfh.fh_generic; 2093 nfsm_srvmtofh(fhp); 2094 nfsm_srvnamesiz(len); 2095 nd.ni_cnd.cn_cred = cred; 2096 nd.ni_cnd.cn_nameiop = CREATE; 2097 nd.ni_cnd.cn_flags = LOCKPARENT | SAVESTART; 2098 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 2099 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2100 if (dirp) { 2101 if (v3) 2102 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 2103 procp); 2104 else { 2105 vrele(dirp); 2106 dirp = (struct vnode *)0; 2107 } 2108 } 2109 if (error) 2110 goto out; 2111 VATTR_NULL(&va); 2112 if (v3) 2113 nfsm_srvsattr(&va); 2114 nfsm_strsiz(len2, NFS_MAXPATHLEN); 2115 pathcp = malloc(len2 + 1, M_TEMP, M_WAITOK); 2116 iv.iov_base = pathcp; 2117 iv.iov_len = len2; 2118 io.uio_resid = len2; 2119 io.uio_offset = 0; 2120 io.uio_iov = &iv; 2121 io.uio_iovcnt = 1; 2122 io.uio_segflg = UIO_SYSSPACE; 2123 io.uio_rw = UIO_READ; 2124 io.uio_procp = (struct proc *)0; 2125 nfsm_mtouio(&io, len2); 2126 if (!v3) { 2127 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2128 va.va_mode = fxdr_unsigned(u_int16_t, sp->sa_mode); 2129 } 2130 *(pathcp + len2) = '\0'; 2131 if (nd.ni_vp) { 2132 vrele(nd.ni_startdir); 2133 PNBUF_PUT(nd.ni_cnd.cn_pnbuf); 2134 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2135 if (nd.ni_dvp == nd.ni_vp) 2136 vrele(nd.ni_dvp); 2137 else 2138 vput(nd.ni_dvp); 2139 vrele(nd.ni_vp); 2140 error = EEXIST; 2141 goto out; 2142 } 2143 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2144 error = VOP_SYMLINK(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va, pathcp); 2145 if (error) 2146 vrele(nd.ni_startdir); 2147 else { 2148 if (v3) { 2149 nd.ni_cnd.cn_nameiop = LOOKUP; 2150 nd.ni_cnd.cn_flags &= ~(LOCKPARENT | SAVESTART | FOLLOW); 2151 nd.ni_cnd.cn_flags |= (NOFOLLOW | LOCKLEAF); 2152 nd.ni_cnd.cn_proc = procp; 2153 nd.ni_cnd.cn_cred = cred; 2154 error = lookup(&nd); 2155 if (!error) { 2156 memset((caddr_t)fhp, 0, sizeof(nfh)); 2157 fhp->fh_fsid = nd.ni_vp->v_mount->mnt_stat.f_fsid; 2158 error = VFS_VPTOFH(nd.ni_vp, &fhp->fh_fid); 2159 if (!error) 2160 error = VOP_GETATTR(nd.ni_vp, &va, cred, 2161 procp); 2162 vput(nd.ni_vp); 2163 } 2164 } else 2165 vrele(nd.ni_startdir); 2166 PNBUF_PUT(nd.ni_cnd.cn_pnbuf); 2167 } 2168 out: 2169 if (pathcp) 2170 free(pathcp, M_TEMP); 2171 if (dirp) { 2172 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 2173 vrele(dirp); 2174 } 2175 nfsm_reply(NFSX_SRVFH(v3) + NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2176 if (v3) { 2177 if (!error) { 2178 nfsm_srvpostop_fh(fhp); 2179 nfsm_srvpostop_attr(0, &va); 2180 } 2181 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2182 } 2183 return (0); 2184 nfsmout: 2185 if (nd.ni_cnd.cn_nameiop) { 2186 vrele(nd.ni_startdir); 2187 PNBUF_PUT(nd.ni_cnd.cn_pnbuf); 2188 } 2189 if (dirp) 2190 vrele(dirp); 2191 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2192 if (nd.ni_dvp == nd.ni_vp) 2193 vrele(nd.ni_dvp); 2194 else 2195 vput(nd.ni_dvp); 2196 if (nd.ni_vp) 2197 vrele(nd.ni_vp); 2198 if (pathcp) 2199 free(pathcp, M_TEMP); 2200 return (error); 2201 } 2202 2203 /* 2204 * nfs mkdir service 2205 */ 2206 int 2207 nfsrv_mkdir(nfsd, slp, procp, mrq) 2208 struct nfsrv_descript *nfsd; 2209 struct nfssvc_sock *slp; 2210 struct proc *procp; 2211 struct mbuf **mrq; 2212 { 2213 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2214 struct mbuf *nam = nfsd->nd_nam; 2215 caddr_t dpos = nfsd->nd_dpos; 2216 struct ucred *cred = &nfsd->nd_cr; 2217 struct vattr va, dirfor, diraft; 2218 struct nfs_fattr *fp; 2219 struct nameidata nd; 2220 caddr_t cp; 2221 u_int32_t *tl; 2222 int32_t t1; 2223 caddr_t bpos; 2224 int error = 0, cache, len, dirfor_ret = 1, diraft_ret = 1; 2225 int v3 = (nfsd->nd_flag & ND_NFSV3); 2226 char *cp2; 2227 struct mbuf *mb, *mb2, *mreq; 2228 struct vnode *vp, *dirp = (struct vnode *)0; 2229 nfsfh_t nfh; 2230 fhandle_t *fhp; 2231 u_quad_t frev; 2232 2233 fhp = &nfh.fh_generic; 2234 nfsm_srvmtofh(fhp); 2235 nfsm_srvnamesiz(len); 2236 nd.ni_cnd.cn_cred = cred; 2237 nd.ni_cnd.cn_nameiop = CREATE; 2238 nd.ni_cnd.cn_flags = LOCKPARENT; 2239 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 2240 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2241 if (dirp) { 2242 if (v3) 2243 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 2244 procp); 2245 else { 2246 vrele(dirp); 2247 dirp = (struct vnode *)0; 2248 } 2249 } 2250 if (error) { 2251 nfsm_reply(NFSX_WCCDATA(v3)); 2252 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2253 if (dirp) 2254 vrele(dirp); 2255 return (0); 2256 } 2257 VATTR_NULL(&va); 2258 if (v3) { 2259 nfsm_srvsattr(&va); 2260 } else { 2261 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2262 va.va_mode = nfstov_mode(*tl++); 2263 } 2264 va.va_type = VDIR; 2265 vp = nd.ni_vp; 2266 if (vp != NULL) { 2267 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2268 if (nd.ni_dvp == vp) 2269 vrele(nd.ni_dvp); 2270 else 2271 vput(nd.ni_dvp); 2272 vrele(vp); 2273 error = EEXIST; 2274 goto out; 2275 } 2276 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2277 error = VOP_MKDIR(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 2278 if (!error) { 2279 vp = nd.ni_vp; 2280 memset((caddr_t)fhp, 0, sizeof(nfh)); 2281 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; 2282 error = VFS_VPTOFH(vp, &fhp->fh_fid); 2283 if (!error) 2284 error = VOP_GETATTR(vp, &va, cred, procp); 2285 vput(vp); 2286 } 2287 out: 2288 if (dirp) { 2289 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 2290 vrele(dirp); 2291 } 2292 nfsm_reply(NFSX_SRVFH(v3) + NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2293 if (v3) { 2294 if (!error) { 2295 nfsm_srvpostop_fh(fhp); 2296 nfsm_srvpostop_attr(0, &va); 2297 } 2298 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2299 } else { 2300 nfsm_srvfhtom(fhp, v3); 2301 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 2302 nfsm_srvfillattr(&va, fp); 2303 } 2304 return (0); 2305 nfsmout: 2306 if (dirp) 2307 vrele(dirp); 2308 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2309 if (nd.ni_dvp == nd.ni_vp) 2310 vrele(nd.ni_dvp); 2311 else 2312 vput(nd.ni_dvp); 2313 if (nd.ni_vp) 2314 vrele(nd.ni_vp); 2315 return (error); 2316 } 2317 2318 /* 2319 * nfs rmdir service 2320 */ 2321 int 2322 nfsrv_rmdir(nfsd, slp, procp, mrq) 2323 struct nfsrv_descript *nfsd; 2324 struct nfssvc_sock *slp; 2325 struct proc *procp; 2326 struct mbuf **mrq; 2327 { 2328 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2329 struct mbuf *nam = nfsd->nd_nam; 2330 caddr_t dpos = nfsd->nd_dpos; 2331 struct ucred *cred = &nfsd->nd_cr; 2332 u_int32_t *tl; 2333 int32_t t1; 2334 caddr_t bpos; 2335 int error = 0, cache, len, dirfor_ret = 1, diraft_ret = 1; 2336 int v3 = (nfsd->nd_flag & ND_NFSV3); 2337 char *cp2; 2338 struct mbuf *mb, *mreq; 2339 struct vnode *vp, *dirp = (struct vnode *)0; 2340 struct vattr dirfor, diraft; 2341 nfsfh_t nfh; 2342 fhandle_t *fhp; 2343 struct nameidata nd; 2344 u_quad_t frev; 2345 2346 fhp = &nfh.fh_generic; 2347 nfsm_srvmtofh(fhp); 2348 nfsm_srvnamesiz(len); 2349 nd.ni_cnd.cn_cred = cred; 2350 nd.ni_cnd.cn_nameiop = DELETE; 2351 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 2352 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 2353 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2354 if (dirp) { 2355 if (v3) 2356 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 2357 procp); 2358 else { 2359 vrele(dirp); 2360 dirp = (struct vnode *)0; 2361 } 2362 } 2363 if (error) { 2364 nfsm_reply(NFSX_WCCDATA(v3)); 2365 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2366 if (dirp) 2367 vrele(dirp); 2368 return (0); 2369 } 2370 vp = nd.ni_vp; 2371 if (vp->v_type != VDIR) { 2372 error = ENOTDIR; 2373 goto out; 2374 } 2375 /* 2376 * No rmdir "." please. 2377 */ 2378 if (nd.ni_dvp == vp) { 2379 error = EINVAL; 2380 goto out; 2381 } 2382 /* 2383 * The root of a mounted filesystem cannot be deleted. 2384 */ 2385 if (vp->v_flag & VROOT) 2386 error = EBUSY; 2387 out: 2388 if (!error) { 2389 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2390 nqsrv_getl(vp, ND_WRITE); 2391 error = VOP_RMDIR(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); 2392 } else { 2393 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2394 if (nd.ni_dvp == nd.ni_vp) 2395 vrele(nd.ni_dvp); 2396 else 2397 vput(nd.ni_dvp); 2398 vput(vp); 2399 } 2400 if (dirp) { 2401 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 2402 vrele(dirp); 2403 } 2404 nfsm_reply(NFSX_WCCDATA(v3)); 2405 if (v3) { 2406 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2407 return (0); 2408 } 2409 nfsm_srvdone; 2410 } 2411 2412 /* 2413 * nfs readdir service 2414 * - mallocs what it thinks is enough to read 2415 * count rounded up to a multiple of NFS_DIRBLKSIZ <= NFS_MAXREADDIR 2416 * - calls VOP_READDIR() 2417 * - loops around building the reply 2418 * if the output generated exceeds count break out of loop 2419 * The nfsm_clget macro is used here so that the reply will be packed 2420 * tightly in mbuf clusters. 2421 * - it only knows that it has encountered eof when the VOP_READDIR() 2422 * reads nothing 2423 * - as such one readdir rpc will return eof false although you are there 2424 * and then the next will return eof 2425 * - it trims out records with d_fileno == 0 2426 * this doesn't matter for Unix clients, but they might confuse clients 2427 * for other os'. 2428 * - it trims out records with d_type == DT_WHT 2429 * these cannot be seen through NFS (unless we extend the protocol) 2430 * NB: It is tempting to set eof to true if the VOP_READDIR() reads less 2431 * than requested, but this may not apply to all filesystems. For 2432 * example, client NFS does not { although it is never remote mounted 2433 * anyhow } 2434 * The alternate call nfsrv_readdirplus() does lookups as well. 2435 * PS: The NFS protocol spec. does not clarify what the "count" byte 2436 * argument is a count of.. just name strings and file id's or the 2437 * entire reply rpc or ... 2438 * I tried just file name and id sizes and it confused the Sun client, 2439 * so I am using the full rpc size now. The "paranoia.." comment refers 2440 * to including the status longwords that are not a part of the dir. 2441 * "entry" structures, but are in the rpc. 2442 */ 2443 struct flrep { 2444 nfsuint64 fl_off; 2445 u_int32_t fl_postopok; 2446 u_int32_t fl_fattr[NFSX_V3FATTR / sizeof (u_int32_t)]; 2447 u_int32_t fl_fhok; 2448 u_int32_t fl_fhsize; 2449 u_int32_t fl_nfh[NFSX_V3FH / sizeof (u_int32_t)]; 2450 }; 2451 2452 int 2453 nfsrv_readdir(nfsd, slp, procp, mrq) 2454 struct nfsrv_descript *nfsd; 2455 struct nfssvc_sock *slp; 2456 struct proc *procp; 2457 struct mbuf **mrq; 2458 { 2459 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2460 struct mbuf *nam = nfsd->nd_nam; 2461 caddr_t dpos = nfsd->nd_dpos; 2462 struct ucred *cred = &nfsd->nd_cr; 2463 char *bp, *be; 2464 struct mbuf *mp; 2465 struct dirent *dp; 2466 caddr_t cp; 2467 u_int32_t *tl; 2468 int32_t t1; 2469 caddr_t bpos; 2470 struct mbuf *mb, *mb2, *mreq, *mp2; 2471 char *cpos, *cend, *cp2, *rbuf; 2472 struct vnode *vp; 2473 struct vattr at; 2474 nfsfh_t nfh; 2475 fhandle_t *fhp; 2476 struct uio io; 2477 struct iovec iv; 2478 int len, nlen, rem, xfer, tsiz, i, error = 0, getret = 1; 2479 int siz, cnt, fullsiz, eofflag, rdonly, cache, ncookies; 2480 int v3 = (nfsd->nd_flag & ND_NFSV3); 2481 u_quad_t frev, off, toff, verf; 2482 off_t *cookies = NULL, *cookiep; 2483 nfsuint64 jar; 2484 2485 fhp = &nfh.fh_generic; 2486 nfsm_srvmtofh(fhp); 2487 if (v3) { 2488 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 2489 toff = fxdr_hyper(tl); 2490 tl += 2; 2491 verf = fxdr_hyper(tl); 2492 tl += 2; 2493 } else { 2494 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2495 toff = fxdr_unsigned(u_quad_t, *tl++); 2496 } 2497 off = toff; 2498 cnt = fxdr_unsigned(int, *tl); 2499 siz = ((cnt + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1)); 2500 xfer = NFS_SRVMAXDATA(nfsd); 2501 if (siz > xfer) 2502 siz = xfer; 2503 fullsiz = siz; 2504 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 2505 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2506 if (!error && vp->v_type != VDIR) { 2507 error = ENOTDIR; 2508 vput(vp); 2509 } 2510 if (error) { 2511 nfsm_reply(NFSX_UNSIGNED); 2512 nfsm_srvpostop_attr(getret, &at); 2513 return (0); 2514 } 2515 nqsrv_getl(vp, ND_READ); 2516 if (v3) { 2517 error = getret = VOP_GETATTR(vp, &at, cred, procp); 2518 #ifdef NFS3_STRICTVERF 2519 /* 2520 * XXX This check is too strict for Solaris 2.5 clients. 2521 */ 2522 if (!error && toff && verf != at.va_filerev) 2523 error = NFSERR_BAD_COOKIE; 2524 #endif 2525 } 2526 if (!error) 2527 error = nfsrv_access(vp, VEXEC, cred, rdonly, procp, 0); 2528 if (error) { 2529 vput(vp); 2530 nfsm_reply(NFSX_POSTOPATTR(v3)); 2531 nfsm_srvpostop_attr(getret, &at); 2532 return (0); 2533 } 2534 VOP_UNLOCK(vp, 0); 2535 rbuf = malloc(siz, M_TEMP, M_WAITOK); 2536 again: 2537 iv.iov_base = rbuf; 2538 iv.iov_len = fullsiz; 2539 io.uio_iov = &iv; 2540 io.uio_iovcnt = 1; 2541 io.uio_offset = (off_t)off; 2542 io.uio_resid = fullsiz; 2543 io.uio_segflg = UIO_SYSSPACE; 2544 io.uio_rw = UIO_READ; 2545 io.uio_procp = (struct proc *)0; 2546 eofflag = 0; 2547 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2548 2549 error = VOP_READDIR(vp, &io, cred, &eofflag, &cookies, &ncookies); 2550 2551 off = (off_t)io.uio_offset; 2552 if (!cookies && !error) 2553 error = NFSERR_PERM; 2554 if (v3) { 2555 getret = VOP_GETATTR(vp, &at, cred, procp); 2556 if (!error) 2557 error = getret; 2558 } 2559 2560 VOP_UNLOCK(vp, 0); 2561 if (error) { 2562 vrele(vp); 2563 free((caddr_t)rbuf, M_TEMP); 2564 if (cookies) 2565 free((caddr_t)cookies, M_TEMP); 2566 nfsm_reply(NFSX_POSTOPATTR(v3)); 2567 nfsm_srvpostop_attr(getret, &at); 2568 return (0); 2569 } 2570 if (io.uio_resid) { 2571 siz -= io.uio_resid; 2572 2573 /* 2574 * If nothing read, return eof 2575 * rpc reply 2576 */ 2577 if (siz == 0) { 2578 vrele(vp); 2579 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_COOKIEVERF(v3) + 2580 2 * NFSX_UNSIGNED); 2581 if (v3) { 2582 nfsm_srvpostop_attr(getret, &at); 2583 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 2584 txdr_hyper(at.va_filerev, tl); 2585 tl += 2; 2586 } else 2587 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2588 *tl++ = nfs_false; 2589 *tl = nfs_true; 2590 free((caddr_t)rbuf, M_TEMP); 2591 free((caddr_t)cookies, M_TEMP); 2592 return (0); 2593 } 2594 } 2595 2596 /* 2597 * Check for degenerate cases of nothing useful read. 2598 * If so go try again 2599 */ 2600 cpos = rbuf; 2601 cend = rbuf + siz; 2602 dp = (struct dirent *)cpos; 2603 cookiep = cookies; 2604 2605 while (cpos < cend && ncookies > 0 && 2606 (dp->d_fileno == 0 || dp->d_type == DT_WHT)) { 2607 cpos += dp->d_reclen; 2608 dp = (struct dirent *)cpos; 2609 cookiep++; 2610 ncookies--; 2611 } 2612 if (cpos >= cend || ncookies == 0) { 2613 toff = off; 2614 siz = fullsiz; 2615 goto again; 2616 } 2617 2618 len = 3 * NFSX_UNSIGNED; /* paranoia, probably can be 0 */ 2619 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_COOKIEVERF(v3) + siz); 2620 if (v3) { 2621 nfsm_srvpostop_attr(getret, &at); 2622 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2623 txdr_hyper(at.va_filerev, tl); 2624 } 2625 mp = mp2 = mb; 2626 bp = bpos; 2627 be = bp + M_TRAILINGSPACE(mp); 2628 2629 /* Loop through the records and build reply */ 2630 while (cpos < cend && ncookies > 0) { 2631 if (dp->d_fileno != 0 && dp->d_type != DT_WHT) { 2632 nlen = dp->d_namlen; 2633 rem = nfsm_rndup(nlen)-nlen; 2634 len += (4 * NFSX_UNSIGNED + nlen + rem); 2635 if (v3) 2636 len += 2 * NFSX_UNSIGNED; 2637 if (len > cnt) { 2638 eofflag = 0; 2639 break; 2640 } 2641 /* 2642 * Build the directory record xdr from 2643 * the dirent entry. 2644 */ 2645 nfsm_clget; 2646 *tl = nfs_true; 2647 bp += NFSX_UNSIGNED; 2648 if (v3) { 2649 nfsm_clget; 2650 *tl = 0; 2651 bp += NFSX_UNSIGNED; 2652 } 2653 nfsm_clget; 2654 *tl = txdr_unsigned(dp->d_fileno); 2655 bp += NFSX_UNSIGNED; 2656 nfsm_clget; 2657 *tl = txdr_unsigned(nlen); 2658 bp += NFSX_UNSIGNED; 2659 2660 /* And loop around copying the name */ 2661 xfer = nlen; 2662 cp = dp->d_name; 2663 while (xfer > 0) { 2664 nfsm_clget; 2665 if ((bp+xfer) > be) 2666 tsiz = be-bp; 2667 else 2668 tsiz = xfer; 2669 memcpy(bp, cp, tsiz); 2670 bp += tsiz; 2671 xfer -= tsiz; 2672 if (xfer > 0) 2673 cp += tsiz; 2674 } 2675 /* And null pad to an int32_t boundary */ 2676 for (i = 0; i < rem; i++) 2677 *bp++ = '\0'; 2678 nfsm_clget; 2679 2680 /* Finish off the record */ 2681 txdr_hyper(*cookiep, &jar); 2682 if (v3) { 2683 *tl = jar.nfsuquad[0]; 2684 bp += NFSX_UNSIGNED; 2685 nfsm_clget; 2686 } 2687 *tl = jar.nfsuquad[1]; 2688 bp += NFSX_UNSIGNED; 2689 } 2690 cpos += dp->d_reclen; 2691 dp = (struct dirent *)cpos; 2692 cookiep++; 2693 ncookies--; 2694 } 2695 vrele(vp); 2696 nfsm_clget; 2697 *tl = nfs_false; 2698 bp += NFSX_UNSIGNED; 2699 nfsm_clget; 2700 if (eofflag) 2701 *tl = nfs_true; 2702 else 2703 *tl = nfs_false; 2704 bp += NFSX_UNSIGNED; 2705 if (mp != mb) { 2706 if (bp < be) 2707 mp->m_len = bp - mtod(mp, caddr_t); 2708 } else 2709 mp->m_len += bp - bpos; 2710 free((caddr_t)rbuf, M_TEMP); 2711 free((caddr_t)cookies, M_TEMP); 2712 nfsm_srvdone; 2713 } 2714 2715 int 2716 nfsrv_readdirplus(nfsd, slp, procp, mrq) 2717 struct nfsrv_descript *nfsd; 2718 struct nfssvc_sock *slp; 2719 struct proc *procp; 2720 struct mbuf **mrq; 2721 { 2722 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2723 struct mbuf *nam = nfsd->nd_nam; 2724 caddr_t dpos = nfsd->nd_dpos; 2725 struct ucred *cred = &nfsd->nd_cr; 2726 char *bp, *be; 2727 struct mbuf *mp; 2728 struct dirent *dp; 2729 caddr_t cp; 2730 u_int32_t *tl; 2731 int32_t t1; 2732 caddr_t bpos; 2733 struct mbuf *mb, *mb2, *mreq, *mp2; 2734 char *cpos, *cend, *cp2, *rbuf; 2735 struct vnode *vp, *nvp; 2736 struct flrep fl; 2737 nfsfh_t nfh; 2738 fhandle_t *fhp, *nfhp = (fhandle_t *)fl.fl_nfh; 2739 struct uio io; 2740 struct iovec iv; 2741 struct vattr va, at, *vap = &va; 2742 struct nfs_fattr *fp; 2743 int len, nlen, rem, xfer, tsiz, i, error = 0, getret = 1; 2744 int siz, cnt, fullsiz, eofflag, rdonly, cache, dirlen, ncookies; 2745 u_quad_t frev, off, toff, verf; 2746 off_t *cookies = NULL, *cookiep; 2747 2748 fhp = &nfh.fh_generic; 2749 nfsm_srvmtofh(fhp); 2750 nfsm_dissect(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 2751 toff = fxdr_hyper(tl); 2752 tl += 2; 2753 verf = fxdr_hyper(tl); 2754 tl += 2; 2755 siz = fxdr_unsigned(int, *tl++); 2756 cnt = fxdr_unsigned(int, *tl); 2757 off = toff; 2758 siz = ((siz + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1)); 2759 xfer = NFS_SRVMAXDATA(nfsd); 2760 if (siz > xfer) 2761 siz = xfer; 2762 fullsiz = siz; 2763 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 2764 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2765 if (!error && vp->v_type != VDIR) { 2766 error = ENOTDIR; 2767 vput(vp); 2768 } 2769 if (error) { 2770 nfsm_reply(NFSX_UNSIGNED); 2771 nfsm_srvpostop_attr(getret, &at); 2772 return (0); 2773 } 2774 error = getret = VOP_GETATTR(vp, &at, cred, procp); 2775 #ifdef NFS3_STRICTVERF 2776 /* 2777 * XXX This check is too strict for Solaris 2.5 clients. 2778 */ 2779 if (!error && toff && verf != at.va_filerev) 2780 error = NFSERR_BAD_COOKIE; 2781 #endif 2782 if (!error) { 2783 nqsrv_getl(vp, ND_READ); 2784 error = nfsrv_access(vp, VEXEC, cred, rdonly, procp, 0); 2785 } 2786 if (error) { 2787 vput(vp); 2788 nfsm_reply(NFSX_V3POSTOPATTR); 2789 nfsm_srvpostop_attr(getret, &at); 2790 return (0); 2791 } 2792 VOP_UNLOCK(vp, 0); 2793 2794 rbuf = malloc(siz, M_TEMP, M_WAITOK); 2795 again: 2796 iv.iov_base = rbuf; 2797 iv.iov_len = fullsiz; 2798 io.uio_iov = &iv; 2799 io.uio_iovcnt = 1; 2800 io.uio_offset = (off_t)off; 2801 io.uio_resid = fullsiz; 2802 io.uio_segflg = UIO_SYSSPACE; 2803 io.uio_rw = UIO_READ; 2804 io.uio_procp = (struct proc *)0; 2805 eofflag = 0; 2806 2807 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2808 2809 error = VOP_READDIR(vp, &io, cred, &eofflag, &cookies, &ncookies); 2810 2811 off = (u_quad_t)io.uio_offset; 2812 getret = VOP_GETATTR(vp, &at, cred, procp); 2813 2814 VOP_UNLOCK(vp, 0); 2815 2816 /* 2817 * If the VGET operation doesn't work for this filesystem, 2818 * we can't support readdirplus. Returning NOTSUPP should 2819 * make clients fall back to plain readdir. 2820 * There's no need to check for VPTOFH as well, we wouldn't 2821 * even be here otherwise. 2822 */ 2823 if (!getret) { 2824 if ((getret = VFS_VGET(vp->v_mount, at.va_fileid, &nvp))) 2825 getret = (getret == EOPNOTSUPP) ? 2826 NFSERR_NOTSUPP : NFSERR_IO; 2827 else 2828 vput(nvp); 2829 } 2830 2831 if (!cookies && !error) 2832 error = NFSERR_PERM; 2833 if (!error) 2834 error = getret; 2835 if (error) { 2836 vrele(vp); 2837 if (cookies) 2838 free((caddr_t)cookies, M_TEMP); 2839 free((caddr_t)rbuf, M_TEMP); 2840 nfsm_reply(NFSX_V3POSTOPATTR); 2841 nfsm_srvpostop_attr(getret, &at); 2842 return (0); 2843 } 2844 if (io.uio_resid) { 2845 siz -= io.uio_resid; 2846 2847 /* 2848 * If nothing read, return eof 2849 * rpc reply 2850 */ 2851 if (siz == 0) { 2852 vrele(vp); 2853 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF + 2854 2 * NFSX_UNSIGNED); 2855 nfsm_srvpostop_attr(getret, &at); 2856 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 2857 txdr_hyper(at.va_filerev, tl); 2858 tl += 2; 2859 *tl++ = nfs_false; 2860 *tl = nfs_true; 2861 free((caddr_t)cookies, M_TEMP); 2862 free((caddr_t)rbuf, M_TEMP); 2863 return (0); 2864 } 2865 } 2866 2867 /* 2868 * Check for degenerate cases of nothing useful read. 2869 * If so go try again 2870 */ 2871 cpos = rbuf; 2872 cend = rbuf + siz; 2873 dp = (struct dirent *)cpos; 2874 cookiep = cookies; 2875 2876 while (cpos < cend && ncookies > 0 && 2877 (dp->d_fileno == 0 || dp->d_type == DT_WHT)) { 2878 cpos += dp->d_reclen; 2879 dp = (struct dirent *)cpos; 2880 cookiep++; 2881 ncookies--; 2882 } 2883 if (cpos >= cend || ncookies == 0) { 2884 toff = off; 2885 siz = fullsiz; 2886 goto again; 2887 } 2888 2889 dirlen = len = NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF + 2 * NFSX_UNSIGNED; 2890 nfsm_reply(cnt); 2891 nfsm_srvpostop_attr(getret, &at); 2892 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2893 txdr_hyper(at.va_filerev, tl); 2894 mp = mp2 = mb; 2895 bp = bpos; 2896 be = bp + M_TRAILINGSPACE(mp); 2897 2898 /* Loop through the records and build reply */ 2899 while (cpos < cend && ncookies > 0) { 2900 if (dp->d_fileno != 0 && dp->d_type != DT_WHT) { 2901 nlen = dp->d_namlen; 2902 rem = nfsm_rndup(nlen)-nlen; 2903 2904 /* 2905 * For readdir_and_lookup get the vnode using 2906 * the file number. 2907 */ 2908 if (VFS_VGET(vp->v_mount, dp->d_fileno, &nvp)) 2909 goto invalid; 2910 memset((caddr_t)nfhp, 0, NFSX_V3FH); 2911 nfhp->fh_fsid = 2912 nvp->v_mount->mnt_stat.f_fsid; 2913 if (VFS_VPTOFH(nvp, &nfhp->fh_fid)) { 2914 vput(nvp); 2915 goto invalid; 2916 } 2917 if (VOP_GETATTR(nvp, vap, cred, procp)) { 2918 vput(nvp); 2919 goto invalid; 2920 } 2921 vput(nvp); 2922 2923 /* 2924 * If either the dircount or maxcount will be 2925 * exceeded, get out now. Both of these lengths 2926 * are calculated conservatively, including all 2927 * XDR overheads. 2928 */ 2929 len += (8 * NFSX_UNSIGNED + nlen + rem + NFSX_V3FH + 2930 NFSX_V3POSTOPATTR); 2931 dirlen += (6 * NFSX_UNSIGNED + nlen + rem); 2932 if (len > cnt || dirlen > fullsiz) { 2933 eofflag = 0; 2934 break; 2935 } 2936 2937 /* 2938 * Build the directory record xdr from 2939 * the dirent entry. 2940 */ 2941 fp = (struct nfs_fattr *)&fl.fl_fattr; 2942 nfsm_srvfillattr(vap, fp); 2943 fl.fl_fhsize = txdr_unsigned(NFSX_V3FH); 2944 fl.fl_fhok = nfs_true; 2945 fl.fl_postopok = nfs_true; 2946 txdr_hyper(*cookiep, fl.fl_off.nfsuquad); 2947 2948 nfsm_clget; 2949 *tl = nfs_true; 2950 bp += NFSX_UNSIGNED; 2951 nfsm_clget; 2952 *tl = 0; 2953 bp += NFSX_UNSIGNED; 2954 nfsm_clget; 2955 *tl = txdr_unsigned(dp->d_fileno); 2956 bp += NFSX_UNSIGNED; 2957 nfsm_clget; 2958 *tl = txdr_unsigned(nlen); 2959 bp += NFSX_UNSIGNED; 2960 2961 /* And loop around copying the name */ 2962 xfer = nlen; 2963 cp = dp->d_name; 2964 while (xfer > 0) { 2965 nfsm_clget; 2966 if ((bp + xfer) > be) 2967 tsiz = be - bp; 2968 else 2969 tsiz = xfer; 2970 memcpy(bp, cp, tsiz); 2971 bp += tsiz; 2972 xfer -= tsiz; 2973 if (xfer > 0) 2974 cp += tsiz; 2975 } 2976 /* And null pad to an int32_t boundary */ 2977 for (i = 0; i < rem; i++) 2978 *bp++ = '\0'; 2979 2980 /* 2981 * Now copy the flrep structure out. 2982 */ 2983 xfer = sizeof (struct flrep); 2984 cp = (caddr_t)&fl; 2985 while (xfer > 0) { 2986 nfsm_clget; 2987 if ((bp + xfer) > be) 2988 tsiz = be - bp; 2989 else 2990 tsiz = xfer; 2991 memcpy(bp, cp, tsiz); 2992 bp += tsiz; 2993 xfer -= tsiz; 2994 if (xfer > 0) 2995 cp += tsiz; 2996 } 2997 } 2998 invalid: 2999 cpos += dp->d_reclen; 3000 dp = (struct dirent *)cpos; 3001 cookiep++; 3002 ncookies--; 3003 } 3004 vrele(vp); 3005 nfsm_clget; 3006 *tl = nfs_false; 3007 bp += NFSX_UNSIGNED; 3008 nfsm_clget; 3009 if (eofflag) 3010 *tl = nfs_true; 3011 else 3012 *tl = nfs_false; 3013 bp += NFSX_UNSIGNED; 3014 if (mp != mb) { 3015 if (bp < be) 3016 mp->m_len = bp - mtod(mp, caddr_t); 3017 } else 3018 mp->m_len += bp - bpos; 3019 free((caddr_t)cookies, M_TEMP); 3020 free((caddr_t)rbuf, M_TEMP); 3021 nfsm_srvdone; 3022 } 3023 3024 /* 3025 * nfs commit service 3026 */ 3027 int 3028 nfsrv_commit(nfsd, slp, procp, mrq) 3029 struct nfsrv_descript *nfsd; 3030 struct nfssvc_sock *slp; 3031 struct proc *procp; 3032 struct mbuf **mrq; 3033 { 3034 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3035 struct mbuf *nam = nfsd->nd_nam; 3036 caddr_t dpos = nfsd->nd_dpos; 3037 struct ucred *cred = &nfsd->nd_cr; 3038 struct vattr bfor, aft; 3039 struct vnode *vp; 3040 nfsfh_t nfh; 3041 fhandle_t *fhp; 3042 u_int32_t *tl; 3043 int32_t t1; 3044 caddr_t bpos; 3045 int error = 0, rdonly, for_ret = 1, aft_ret = 1, cnt, cache; 3046 char *cp2; 3047 struct mbuf *mb, *mb2, *mreq; 3048 u_quad_t frev, off; 3049 3050 #ifndef nolint 3051 cache = 0; 3052 #endif 3053 fhp = &nfh.fh_generic; 3054 nfsm_srvmtofh(fhp); 3055 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 3056 3057 off = fxdr_hyper(tl); 3058 tl += 2; 3059 cnt = fxdr_unsigned(int, *tl); 3060 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 3061 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 3062 if (error) { 3063 nfsm_reply(2 * NFSX_UNSIGNED); 3064 nfsm_srvwcc_data(for_ret, &bfor, aft_ret, &aft); 3065 return (0); 3066 } 3067 for_ret = VOP_GETATTR(vp, &bfor, cred, procp); 3068 error = VOP_FSYNC(vp, cred, FSYNC_WAIT, off, off + cnt, procp); 3069 aft_ret = VOP_GETATTR(vp, &aft, cred, procp); 3070 vput(vp); 3071 nfsm_reply(NFSX_V3WCCDATA + NFSX_V3WRITEVERF); 3072 nfsm_srvwcc_data(for_ret, &bfor, aft_ret, &aft); 3073 if (!error) { 3074 nfsm_build(tl, u_int32_t *, NFSX_V3WRITEVERF); 3075 *tl++ = txdr_unsigned(boottime.tv_sec); 3076 *tl = txdr_unsigned(boottime.tv_usec); 3077 } else 3078 return (0); 3079 nfsm_srvdone; 3080 } 3081 3082 /* 3083 * nfs statfs service 3084 */ 3085 int 3086 nfsrv_statfs(nfsd, slp, procp, mrq) 3087 struct nfsrv_descript *nfsd; 3088 struct nfssvc_sock *slp; 3089 struct proc *procp; 3090 struct mbuf **mrq; 3091 { 3092 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3093 struct mbuf *nam = nfsd->nd_nam; 3094 caddr_t dpos = nfsd->nd_dpos; 3095 struct ucred *cred = &nfsd->nd_cr; 3096 struct statfs *sf; 3097 struct nfs_statfs *sfp; 3098 u_int32_t *tl; 3099 int32_t t1; 3100 caddr_t bpos; 3101 int error = 0, rdonly, cache, getret = 1; 3102 int v3 = (nfsd->nd_flag & ND_NFSV3); 3103 char *cp2; 3104 struct mbuf *mb, *mb2, *mreq; 3105 struct vnode *vp; 3106 struct vattr at; 3107 nfsfh_t nfh; 3108 fhandle_t *fhp; 3109 struct statfs statfs; 3110 u_quad_t frev, tval; 3111 3112 #ifndef nolint 3113 cache = 0; 3114 #endif 3115 fhp = &nfh.fh_generic; 3116 nfsm_srvmtofh(fhp); 3117 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 3118 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 3119 if (error) { 3120 nfsm_reply(NFSX_UNSIGNED); 3121 nfsm_srvpostop_attr(getret, &at); 3122 return (0); 3123 } 3124 sf = &statfs; 3125 error = VFS_STATFS(vp->v_mount, sf, procp); 3126 getret = VOP_GETATTR(vp, &at, cred, procp); 3127 vput(vp); 3128 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_STATFS(v3)); 3129 if (v3) 3130 nfsm_srvpostop_attr(getret, &at); 3131 if (error) 3132 return (0); 3133 nfsm_build(sfp, struct nfs_statfs *, NFSX_STATFS(v3)); 3134 if (v3) { 3135 tval = (u_quad_t)((quad_t)sf->f_blocks * (quad_t)sf->f_bsize); 3136 txdr_hyper(tval, &sfp->sf_tbytes); 3137 tval = (u_quad_t)((quad_t)sf->f_bfree * (quad_t)sf->f_bsize); 3138 txdr_hyper(tval, &sfp->sf_fbytes); 3139 tval = (u_quad_t)((quad_t)sf->f_bavail * (quad_t)sf->f_bsize); 3140 txdr_hyper(tval, &sfp->sf_abytes); 3141 tval = (u_quad_t)sf->f_files; 3142 txdr_hyper(tval, &sfp->sf_tfiles); 3143 tval = (u_quad_t)sf->f_ffree; 3144 txdr_hyper(tval, &sfp->sf_ffiles); 3145 txdr_hyper(tval, &sfp->sf_afiles); 3146 sfp->sf_invarsec = 0; 3147 } else { 3148 sfp->sf_tsize = txdr_unsigned(NFS_MAXDGRAMDATA); 3149 sfp->sf_bsize = txdr_unsigned(sf->f_bsize); 3150 sfp->sf_blocks = txdr_unsigned(sf->f_blocks); 3151 sfp->sf_bfree = txdr_unsigned(sf->f_bfree); 3152 sfp->sf_bavail = txdr_unsigned(sf->f_bavail); 3153 } 3154 nfsm_srvdone; 3155 } 3156 3157 /* 3158 * nfs fsinfo service 3159 */ 3160 int 3161 nfsrv_fsinfo(nfsd, slp, procp, mrq) 3162 struct nfsrv_descript *nfsd; 3163 struct nfssvc_sock *slp; 3164 struct proc *procp; 3165 struct mbuf **mrq; 3166 { 3167 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3168 struct mbuf *nam = nfsd->nd_nam; 3169 caddr_t dpos = nfsd->nd_dpos; 3170 struct ucred *cred = &nfsd->nd_cr; 3171 u_int32_t *tl; 3172 struct nfsv3_fsinfo *sip; 3173 int32_t t1; 3174 caddr_t bpos; 3175 int error = 0, rdonly, cache, getret = 1, pref; 3176 char *cp2; 3177 struct mbuf *mb, *mb2, *mreq; 3178 struct vnode *vp; 3179 struct vattr at; 3180 nfsfh_t nfh; 3181 fhandle_t *fhp; 3182 u_quad_t frev, maxfsize; 3183 struct statfs sb; 3184 3185 #ifndef nolint 3186 cache = 0; 3187 #endif 3188 fhp = &nfh.fh_generic; 3189 nfsm_srvmtofh(fhp); 3190 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 3191 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 3192 if (error) { 3193 nfsm_reply(NFSX_UNSIGNED); 3194 nfsm_srvpostop_attr(getret, &at); 3195 return (0); 3196 } 3197 3198 /* XXX Try to make a guess on the max file size. */ 3199 VFS_STATFS(vp->v_mount, &sb, (struct proc *)0); 3200 maxfsize = (u_quad_t)0x80000000 * sb.f_bsize - 1; 3201 3202 getret = VOP_GETATTR(vp, &at, cred, procp); 3203 vput(vp); 3204 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3FSINFO); 3205 nfsm_srvpostop_attr(getret, &at); 3206 nfsm_build(sip, struct nfsv3_fsinfo *, NFSX_V3FSINFO); 3207 3208 /* 3209 * XXX 3210 * There should be file system VFS OP(s) to get this information. 3211 * For now, assume ufs. 3212 */ 3213 if (slp->ns_so->so_type == SOCK_DGRAM) 3214 pref = NFS_MAXDGRAMDATA; 3215 else 3216 pref = NFS_MAXDATA; 3217 sip->fs_rtmax = txdr_unsigned(NFS_MAXDATA); 3218 sip->fs_rtpref = txdr_unsigned(pref); 3219 sip->fs_rtmult = txdr_unsigned(NFS_FABLKSIZE); 3220 sip->fs_wtmax = txdr_unsigned(NFS_MAXDATA); 3221 sip->fs_wtpref = txdr_unsigned(pref); 3222 sip->fs_wtmult = txdr_unsigned(NFS_FABLKSIZE); 3223 sip->fs_dtpref = txdr_unsigned(pref); 3224 txdr_hyper(maxfsize, &sip->fs_maxfilesize); 3225 sip->fs_timedelta.nfsv3_sec = 0; 3226 sip->fs_timedelta.nfsv3_nsec = txdr_unsigned(1); 3227 sip->fs_properties = txdr_unsigned(NFSV3FSINFO_LINK | 3228 NFSV3FSINFO_SYMLINK | NFSV3FSINFO_HOMOGENEOUS | 3229 NFSV3FSINFO_CANSETTIME); 3230 nfsm_srvdone; 3231 } 3232 3233 /* 3234 * nfs pathconf service 3235 */ 3236 int 3237 nfsrv_pathconf(nfsd, slp, procp, mrq) 3238 struct nfsrv_descript *nfsd; 3239 struct nfssvc_sock *slp; 3240 struct proc *procp; 3241 struct mbuf **mrq; 3242 { 3243 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3244 struct mbuf *nam = nfsd->nd_nam; 3245 caddr_t dpos = nfsd->nd_dpos; 3246 struct ucred *cred = &nfsd->nd_cr; 3247 u_int32_t *tl; 3248 struct nfsv3_pathconf *pc; 3249 int32_t t1; 3250 caddr_t bpos; 3251 int error = 0, rdonly, cache, getret = 1; 3252 register_t linkmax, namemax, chownres, notrunc; 3253 char *cp2; 3254 struct mbuf *mb, *mb2, *mreq; 3255 struct vnode *vp; 3256 struct vattr at; 3257 nfsfh_t nfh; 3258 fhandle_t *fhp; 3259 u_quad_t frev; 3260 3261 #ifndef nolint 3262 cache = 0; 3263 #endif 3264 fhp = &nfh.fh_generic; 3265 nfsm_srvmtofh(fhp); 3266 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 3267 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 3268 if (error) { 3269 nfsm_reply(NFSX_UNSIGNED); 3270 nfsm_srvpostop_attr(getret, &at); 3271 return (0); 3272 } 3273 error = VOP_PATHCONF(vp, _PC_LINK_MAX, &linkmax); 3274 if (!error) 3275 error = VOP_PATHCONF(vp, _PC_NAME_MAX, &namemax); 3276 if (!error) 3277 error = VOP_PATHCONF(vp, _PC_CHOWN_RESTRICTED, &chownres); 3278 if (!error) 3279 error = VOP_PATHCONF(vp, _PC_NO_TRUNC, ¬runc); 3280 getret = VOP_GETATTR(vp, &at, cred, procp); 3281 vput(vp); 3282 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3PATHCONF); 3283 nfsm_srvpostop_attr(getret, &at); 3284 if (error) 3285 return (0); 3286 nfsm_build(pc, struct nfsv3_pathconf *, NFSX_V3PATHCONF); 3287 3288 pc->pc_linkmax = txdr_unsigned(linkmax); 3289 pc->pc_namemax = txdr_unsigned(namemax); 3290 pc->pc_notrunc = txdr_unsigned(notrunc); 3291 pc->pc_chownrestricted = txdr_unsigned(chownres); 3292 3293 /* 3294 * These should probably be supported by VOP_PATHCONF(), but 3295 * until msdosfs is exportable (why would you want to?), the 3296 * Unix defaults should be ok. 3297 */ 3298 pc->pc_caseinsensitive = nfs_false; 3299 pc->pc_casepreserving = nfs_true; 3300 nfsm_srvdone; 3301 } 3302 3303 /* 3304 * Null operation, used by clients to ping server 3305 */ 3306 /* ARGSUSED */ 3307 int 3308 nfsrv_null(nfsd, slp, procp, mrq) 3309 struct nfsrv_descript *nfsd; 3310 struct nfssvc_sock *slp; 3311 struct proc *procp; 3312 struct mbuf **mrq; 3313 { 3314 struct mbuf *mrep = nfsd->nd_mrep; 3315 caddr_t bpos; 3316 int error = NFSERR_RETVOID, cache = 0; 3317 struct mbuf *mb, *mreq; 3318 u_quad_t frev; 3319 3320 nfsm_reply(0); 3321 return (0); 3322 } 3323 3324 /* 3325 * No operation, used for obsolete procedures 3326 */ 3327 /* ARGSUSED */ 3328 int 3329 nfsrv_noop(nfsd, slp, procp, mrq) 3330 struct nfsrv_descript *nfsd; 3331 struct nfssvc_sock *slp; 3332 struct proc *procp; 3333 struct mbuf **mrq; 3334 { 3335 struct mbuf *mrep = nfsd->nd_mrep; 3336 caddr_t bpos; 3337 int error, cache = 0; 3338 struct mbuf *mb, *mreq; 3339 u_quad_t frev; 3340 3341 if (nfsd->nd_repstat) 3342 error = nfsd->nd_repstat; 3343 else 3344 error = EPROCUNAVAIL; 3345 nfsm_reply(0); 3346 return (0); 3347 } 3348 3349 /* 3350 * Perform access checking for vnodes obtained from file handles that would 3351 * refer to files already opened by a Unix client. You cannot just use 3352 * vn_writechk() and VOP_ACCESS() for two reasons. 3353 * 1 - You must check for exported rdonly as well as MNT_RDONLY for the write case 3354 * 2 - The owner is to be given access irrespective of mode bits for some 3355 * operations, so that processes that chmod after opening a file don't 3356 * break. I don't like this because it opens a security hole, but since 3357 * the nfs server opens a security hole the size of a barn door anyhow, 3358 * what the heck. 3359 * 3360 * The exception to rule 2 is EPERM. If a file is IMMUTABLE, VOP_ACCESS() 3361 * will return EPERM instead of EACCESS. EPERM is always an error. 3362 */ 3363 int 3364 nfsrv_access(vp, flags, cred, rdonly, p, override) 3365 struct vnode *vp; 3366 int flags; 3367 struct ucred *cred; 3368 int rdonly; 3369 struct proc *p; 3370 { 3371 struct vattr vattr; 3372 int error; 3373 if (flags & VWRITE) { 3374 /* Just vn_writechk() changed to check rdonly */ 3375 /* 3376 * Disallow write attempts on read-only file systems; 3377 * unless the file is a socket or a block or character 3378 * device resident on the file system. 3379 */ 3380 if (rdonly || (vp->v_mount->mnt_flag & MNT_RDONLY)) { 3381 switch (vp->v_type) { 3382 case VREG: 3383 case VDIR: 3384 case VLNK: 3385 return (EROFS); 3386 default: 3387 break; 3388 } 3389 } 3390 3391 /* 3392 * If the vnode is in use as a process's text, 3393 * we can't allow writing. 3394 */ 3395 if (vp->v_flag & VTEXT) 3396 return (ETXTBSY); 3397 } 3398 error = VOP_GETATTR(vp, &vattr, cred, p); 3399 if (error) 3400 return (error); 3401 error = VOP_ACCESS(vp, flags, cred, p); 3402 /* 3403 * Allow certain operations for the owner (reads and writes 3404 * on files that are already open). 3405 */ 3406 if (override && error == EACCES && cred->cr_uid == vattr.va_uid) 3407 error = 0; 3408 return error; 3409 } 3410
Indexes created Thu Oct 02 14:10:14 GMT 2025