nfs_serv.c revision 1.71
1 /* $NetBSD: nfs_serv.c,v 1.71 2003/04/03 15:19:12 yamt 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/cdefs.h> 62 __KERNEL_RCSID(0, "$NetBSD: nfs_serv.c,v 1.71 2003/04/03 15:19:12 yamt Exp $"); 63 64 #include <sys/param.h> 65 #include <sys/systm.h> 66 #include <sys/proc.h> 67 #include <sys/file.h> 68 #include <sys/namei.h> 69 #include <sys/vnode.h> 70 #include <sys/mount.h> 71 #include <sys/socket.h> 72 #include <sys/socketvar.h> 73 #include <sys/mbuf.h> 74 #include <sys/dirent.h> 75 #include <sys/stat.h> 76 #include <sys/kernel.h> 77 #include <ufs/ufs/dir.h> 78 79 #include <uvm/uvm_extern.h> 80 81 #include <nfs/nfsproto.h> 82 #include <nfs/rpcv2.h> 83 #include <nfs/nfs.h> 84 #include <nfs/xdr_subs.h> 85 #include <nfs/nfsm_subs.h> 86 #include <nfs/nqnfs.h> 87 #include <nfs/nfs_var.h> 88 89 /* Global vars */ 90 extern u_int32_t nfs_xdrneg1; 91 extern u_int32_t nfs_false, nfs_true; 92 extern enum vtype nv3tov_type[8]; 93 extern struct nfsstats nfsstats; 94 extern const nfstype nfsv2_type[9]; 95 extern const nfstype nfsv3_type[9]; 96 int nfsrvw_procrastinate = NFS_GATHERDELAY * 1000; 97 98 /* 99 * nfs v3 access service 100 */ 101 int 102 nfsrv3_access(nfsd, slp, procp, mrq) 103 struct nfsrv_descript *nfsd; 104 struct nfssvc_sock *slp; 105 struct proc *procp; 106 struct mbuf **mrq; 107 { 108 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 109 struct mbuf *nam = nfsd->nd_nam; 110 caddr_t dpos = nfsd->nd_dpos; 111 struct ucred *cred = &nfsd->nd_cr; 112 struct vnode *vp; 113 nfsfh_t nfh; 114 fhandle_t *fhp; 115 u_int32_t *tl; 116 int32_t t1; 117 caddr_t bpos; 118 int error = 0, rdonly, cache = 0, getret; 119 char *cp2; 120 struct mbuf *mb, *mreq; 121 struct vattr va; 122 u_long inmode, testmode, outmode; 123 u_quad_t frev; 124 125 fhp = &nfh.fh_generic; 126 nfsm_srvmtofh(fhp); 127 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 128 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, &rdonly, 129 (nfsd->nd_flag & ND_KERBAUTH), FALSE); 130 if (error) { 131 nfsm_reply(NFSX_UNSIGNED); 132 nfsm_srvpostop_attr(1, (struct vattr *)0); 133 return (0); 134 } 135 inmode = fxdr_unsigned(u_int32_t, *tl); 136 outmode = 0; 137 if ((inmode & NFSV3ACCESS_READ) && 138 nfsrv_access(vp, VREAD, cred, rdonly, procp, 0) == 0) 139 outmode |= NFSV3ACCESS_READ; 140 if (vp->v_type != VDIR) { 141 testmode = inmode & (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND); 142 if (testmode && 143 nfsrv_access(vp, VWRITE, cred, rdonly, procp, 0) == 0) 144 outmode |= testmode; 145 if ((inmode & NFSV3ACCESS_EXECUTE) && 146 nfsrv_access(vp, VEXEC, cred, rdonly, procp, 0) == 0) 147 outmode |= NFSV3ACCESS_EXECUTE; 148 } else { 149 testmode = inmode & (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | 150 NFSV3ACCESS_DELETE); 151 if (testmode && 152 nfsrv_access(vp, VWRITE, cred, rdonly, procp, 0) == 0) 153 outmode |= testmode; 154 if ((inmode & NFSV3ACCESS_LOOKUP) && 155 nfsrv_access(vp, VEXEC, cred, rdonly, procp, 0) == 0) 156 outmode |= NFSV3ACCESS_LOOKUP; 157 } 158 getret = VOP_GETATTR(vp, &va, cred, procp); 159 vput(vp); 160 nfsm_reply(NFSX_POSTOPATTR(1) + NFSX_UNSIGNED); 161 nfsm_srvpostop_attr(getret, &va); 162 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 163 *tl = txdr_unsigned(outmode); 164 nfsm_srvdone; 165 } 166 167 /* 168 * nfs getattr service 169 */ 170 int 171 nfsrv_getattr(nfsd, slp, procp, mrq) 172 struct nfsrv_descript *nfsd; 173 struct nfssvc_sock *slp; 174 struct proc *procp; 175 struct mbuf **mrq; 176 { 177 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 178 struct mbuf *nam = nfsd->nd_nam; 179 caddr_t dpos = nfsd->nd_dpos; 180 struct ucred *cred = &nfsd->nd_cr; 181 struct nfs_fattr *fp; 182 struct vattr va; 183 struct vnode *vp; 184 nfsfh_t nfh; 185 fhandle_t *fhp; 186 u_int32_t *tl; 187 int32_t t1; 188 caddr_t bpos; 189 int error = 0, rdonly, cache; 190 char *cp2; 191 struct mbuf *mb, *mreq; 192 u_quad_t frev; 193 194 fhp = &nfh.fh_generic; 195 nfsm_srvmtofh(fhp); 196 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, &rdonly, 197 (nfsd->nd_flag & ND_KERBAUTH), FALSE); 198 if (error) { 199 nfsm_reply(0); 200 return (0); 201 } 202 nqsrv_getl(vp, ND_READ); 203 error = VOP_GETATTR(vp, &va, cred, procp); 204 vput(vp); 205 nfsm_reply(NFSX_FATTR(nfsd->nd_flag & ND_NFSV3)); 206 if (error) 207 return (0); 208 nfsm_build(fp, struct nfs_fattr *, NFSX_FATTR(nfsd->nd_flag & ND_NFSV3)); 209 nfsm_srvfillattr(&va, fp); 210 nfsm_srvdone; 211 } 212 213 /* 214 * nfs setattr service 215 */ 216 int 217 nfsrv_setattr(nfsd, slp, procp, mrq) 218 struct nfsrv_descript *nfsd; 219 struct nfssvc_sock *slp; 220 struct proc *procp; 221 struct mbuf **mrq; 222 { 223 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 224 struct mbuf *nam = nfsd->nd_nam; 225 caddr_t dpos = nfsd->nd_dpos; 226 struct ucred *cred = &nfsd->nd_cr; 227 struct vattr va, preat; 228 struct nfsv2_sattr *sp; 229 struct nfs_fattr *fp; 230 struct vnode *vp; 231 nfsfh_t nfh; 232 fhandle_t *fhp; 233 u_int32_t *tl; 234 int32_t t1; 235 caddr_t bpos; 236 int error = 0, rdonly, cache, preat_ret = 1, postat_ret = 1; 237 int v3 = (nfsd->nd_flag & ND_NFSV3), gcheck = 0; 238 char *cp2; 239 struct mbuf *mb, *mreq; 240 u_quad_t frev; 241 struct timespec guard; 242 243 fhp = &nfh.fh_generic; 244 nfsm_srvmtofh(fhp); 245 VATTR_NULL(&va); 246 if (v3) { 247 nfsm_srvsattr(&va); 248 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 249 gcheck = fxdr_unsigned(int, *tl); 250 if (gcheck) { 251 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 252 fxdr_nfsv3time(tl, &guard); 253 } 254 } else { 255 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 256 /* 257 * Nah nah nah nah na nah 258 * There is a bug in the Sun client that puts 0xffff in the mode 259 * field of sattr when it should put in 0xffffffff. The u_short 260 * doesn't sign extend. 261 * --> check the low order 2 bytes for 0xffff 262 */ 263 if ((fxdr_unsigned(int, sp->sa_mode) & 0xffff) != 0xffff) 264 va.va_mode = nfstov_mode(sp->sa_mode); 265 if (sp->sa_uid != nfs_xdrneg1) 266 va.va_uid = fxdr_unsigned(uid_t, sp->sa_uid); 267 if (sp->sa_gid != nfs_xdrneg1) 268 va.va_gid = fxdr_unsigned(gid_t, sp->sa_gid); 269 if (sp->sa_size != nfs_xdrneg1) 270 va.va_size = fxdr_unsigned(u_quad_t, sp->sa_size); 271 if (sp->sa_atime.nfsv2_sec != nfs_xdrneg1) { 272 #ifdef notyet 273 fxdr_nfsv2time(&sp->sa_atime, &va.va_atime); 274 #else 275 va.va_atime.tv_sec = 276 fxdr_unsigned(u_int32_t,sp->sa_atime.nfsv2_sec); 277 va.va_atime.tv_nsec = 0; 278 #endif 279 } 280 if (sp->sa_mtime.nfsv2_sec != nfs_xdrneg1) 281 fxdr_nfsv2time(&sp->sa_mtime, &va.va_mtime); 282 283 } 284 285 /* 286 * Now that we have all the fields, lets do it. 287 */ 288 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, &rdonly, 289 (nfsd->nd_flag & ND_KERBAUTH), FALSE); 290 if (error) { 291 nfsm_reply(2 * NFSX_UNSIGNED); 292 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 293 return (0); 294 } 295 nqsrv_getl(vp, ND_WRITE); 296 if (v3) { 297 error = preat_ret = VOP_GETATTR(vp, &preat, cred, procp); 298 if (!error && gcheck && 299 (preat.va_ctime.tv_sec != guard.tv_sec || 300 preat.va_ctime.tv_nsec != guard.tv_nsec)) 301 error = NFSERR_NOT_SYNC; 302 if (error) { 303 vput(vp); 304 nfsm_reply(NFSX_WCCDATA(v3)); 305 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 306 return (0); 307 } 308 } 309 310 /* 311 * If the size is being changed write acces is required, otherwise 312 * just check for a read only file system. 313 */ 314 if (va.va_size == ((u_quad_t)((quad_t) -1))) { 315 if (rdonly || (vp->v_mount->mnt_flag & MNT_RDONLY)) { 316 error = EROFS; 317 goto out; 318 } 319 } else { 320 if (vp->v_type == VDIR) { 321 error = EISDIR; 322 goto out; 323 } else if ((error = nfsrv_access(vp, VWRITE, cred, rdonly, 324 procp, 0)) != 0) 325 goto out; 326 } 327 error = VOP_SETATTR(vp, &va, cred, procp); 328 postat_ret = VOP_GETATTR(vp, &va, cred, procp); 329 if (!error) 330 error = postat_ret; 331 out: 332 vput(vp); 333 nfsm_reply(NFSX_WCCORFATTR(v3)); 334 if (v3) { 335 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 336 return (0); 337 } else { 338 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 339 nfsm_srvfillattr(&va, fp); 340 } 341 nfsm_srvdone; 342 } 343 344 /* 345 * nfs lookup rpc 346 */ 347 int 348 nfsrv_lookup(nfsd, slp, procp, mrq) 349 struct nfsrv_descript *nfsd; 350 struct nfssvc_sock *slp; 351 struct proc *procp; 352 struct mbuf **mrq; 353 { 354 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 355 struct mbuf *nam = nfsd->nd_nam; 356 caddr_t dpos = nfsd->nd_dpos; 357 struct ucred *cred = &nfsd->nd_cr; 358 struct nfs_fattr *fp; 359 struct nameidata nd, ind, *ndp = &nd; 360 struct vnode *vp, *dirp; 361 nfsfh_t nfh; 362 fhandle_t *fhp; 363 caddr_t cp; 364 u_int32_t *tl; 365 int32_t t1; 366 caddr_t bpos; 367 int error = 0, cache, dirattr_ret = 1; 368 uint32_t len; 369 int v3 = (nfsd->nd_flag & ND_NFSV3), pubflag; 370 char *cp2; 371 struct mbuf *mb, *mreq; 372 struct vattr va, dirattr; 373 u_quad_t frev; 374 375 fhp = &nfh.fh_generic; 376 nfsm_srvmtofh(fhp); 377 nfsm_srvnamesiz(len); 378 379 pubflag = nfs_ispublicfh(fhp); 380 381 nd.ni_cnd.cn_cred = cred; 382 nd.ni_cnd.cn_nameiop = LOOKUP; 383 nd.ni_cnd.cn_flags = LOCKLEAF | SAVESTART; 384 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 385 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), pubflag); 386 387 if (!error && pubflag) { 388 if (nd.ni_vp->v_type == VDIR && nfs_pub.np_index != NULL) { 389 /* 390 * Setup call to lookup() to see if we can find 391 * the index file. Arguably, this doesn't belong 392 * in a kernel.. Ugh. 393 */ 394 ind = nd; 395 VOP_UNLOCK(nd.ni_vp, 0); 396 ind.ni_pathlen = strlen(nfs_pub.np_index); 397 ind.ni_cnd.cn_nameptr = ind.ni_cnd.cn_pnbuf = 398 nfs_pub.np_index; 399 ind.ni_startdir = nd.ni_vp; 400 VREF(ind.ni_startdir); 401 error = lookup(&ind); 402 if (!error) { 403 /* 404 * Found an index file. Get rid of 405 * the old references. 406 */ 407 if (dirp) 408 vrele(dirp); 409 dirp = nd.ni_vp; 410 vrele(nd.ni_startdir); 411 ndp = &ind; 412 } else 413 error = 0; 414 } 415 /* 416 * If the public filehandle was used, check that this lookup 417 * didn't result in a filehandle outside the publicly exported 418 * filesystem. 419 */ 420 421 if (!error && ndp->ni_vp->v_mount != nfs_pub.np_mount) { 422 vput(nd.ni_vp); 423 error = EPERM; 424 } 425 } 426 427 if (dirp) { 428 if (v3) 429 dirattr_ret = VOP_GETATTR(dirp, &dirattr, cred, 430 procp); 431 vrele(dirp); 432 } 433 434 if (error) { 435 nfsm_reply(NFSX_POSTOPATTR(v3)); 436 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 437 return (0); 438 } 439 440 nqsrv_getl(ndp->ni_startdir, ND_READ); 441 vrele(ndp->ni_startdir); 442 PNBUF_PUT(nd.ni_cnd.cn_pnbuf); 443 vp = ndp->ni_vp; 444 memset((caddr_t)fhp, 0, sizeof(nfh)); 445 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; 446 error = VFS_VPTOFH(vp, &fhp->fh_fid); 447 if (!error) 448 error = VOP_GETATTR(vp, &va, cred, procp); 449 vput(vp); 450 nfsm_reply(NFSX_SRVFH(v3) + NFSX_POSTOPORFATTR(v3) + NFSX_POSTOPATTR(v3)); 451 if (error) { 452 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 453 return (0); 454 } 455 nfsm_srvfhtom(fhp, v3); 456 if (v3) { 457 nfsm_srvpostop_attr(0, &va); 458 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 459 } else { 460 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 461 nfsm_srvfillattr(&va, fp); 462 } 463 nfsm_srvdone; 464 } 465 466 /* 467 * nfs readlink service 468 */ 469 int 470 nfsrv_readlink(nfsd, slp, procp, mrq) 471 struct nfsrv_descript *nfsd; 472 struct nfssvc_sock *slp; 473 struct proc *procp; 474 struct mbuf **mrq; 475 { 476 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 477 struct mbuf *nam = nfsd->nd_nam; 478 caddr_t dpos = nfsd->nd_dpos; 479 struct ucred *cred = &nfsd->nd_cr; 480 struct iovec iv[(NFS_MAXPATHLEN+MLEN-1)/MLEN]; 481 struct iovec *ivp = iv; 482 struct mbuf *mp; 483 u_int32_t *tl; 484 int32_t t1; 485 caddr_t bpos; 486 int error = 0, rdonly, cache, i, tlen, len, getret; 487 int v3 = (nfsd->nd_flag & ND_NFSV3); 488 char *cp2; 489 struct mbuf *mb, *mp2 = NULL, *mp3 = NULL, *mreq; 490 struct vnode *vp; 491 struct vattr attr; 492 nfsfh_t nfh; 493 fhandle_t *fhp; 494 struct uio io, *uiop = &io; 495 u_quad_t frev; 496 497 fhp = &nfh.fh_generic; 498 nfsm_srvmtofh(fhp); 499 len = 0; 500 i = 0; 501 while (len < NFS_MAXPATHLEN) { 502 mp = m_get(M_WAIT, MT_DATA); 503 MCLAIM(mp, &nfs_mowner); 504 m_clget(mp, M_WAIT); 505 mp->m_len = NFSMSIZ(mp); 506 if (len == 0) 507 mp3 = mp2 = mp; 508 else { 509 mp2->m_next = mp; 510 mp2 = mp; 511 } 512 if ((len+mp->m_len) > NFS_MAXPATHLEN) { 513 mp->m_len = NFS_MAXPATHLEN-len; 514 len = NFS_MAXPATHLEN; 515 } else 516 len += mp->m_len; 517 ivp->iov_base = mtod(mp, caddr_t); 518 ivp->iov_len = mp->m_len; 519 i++; 520 ivp++; 521 } 522 uiop->uio_iov = iv; 523 uiop->uio_iovcnt = i; 524 uiop->uio_offset = 0; 525 uiop->uio_resid = len; 526 uiop->uio_rw = UIO_READ; 527 uiop->uio_segflg = UIO_SYSSPACE; 528 uiop->uio_procp = (struct proc *)0; 529 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 530 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 531 if (error) { 532 m_freem(mp3); 533 nfsm_reply(2 * NFSX_UNSIGNED); 534 nfsm_srvpostop_attr(1, (struct vattr *)0); 535 return (0); 536 } 537 if (vp->v_type != VLNK) { 538 if (v3) 539 error = EINVAL; 540 else 541 error = ENXIO; 542 goto out; 543 } 544 nqsrv_getl(vp, ND_READ); 545 error = VOP_READLINK(vp, uiop, cred); 546 out: 547 getret = VOP_GETATTR(vp, &attr, cred, procp); 548 vput(vp); 549 if (error) 550 m_freem(mp3); 551 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_UNSIGNED); 552 if (v3) { 553 nfsm_srvpostop_attr(getret, &attr); 554 if (error) 555 return (0); 556 } 557 if (uiop->uio_resid > 0) { 558 len -= uiop->uio_resid; 559 tlen = nfsm_rndup(len); 560 nfsm_adj(mp3, NFS_MAXPATHLEN-tlen, tlen-len); 561 } 562 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 563 *tl = txdr_unsigned(len); 564 mb->m_next = mp3; 565 nfsm_srvdone; 566 } 567 568 /* 569 * nfs read service 570 */ 571 int 572 nfsrv_read(nfsd, slp, procp, mrq) 573 struct nfsrv_descript *nfsd; 574 struct nfssvc_sock *slp; 575 struct proc *procp; 576 struct mbuf **mrq; 577 { 578 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 579 struct mbuf *nam = nfsd->nd_nam; 580 caddr_t dpos = nfsd->nd_dpos; 581 struct ucred *cred = &nfsd->nd_cr; 582 struct iovec *iv; 583 struct iovec *iv2; 584 struct mbuf *m; 585 struct nfs_fattr *fp; 586 u_int32_t *tl; 587 int32_t t1; 588 int i; 589 caddr_t bpos; 590 int error = 0, rdonly, cache, cnt, len, left, siz, tlen, getret; 591 int v3 = (nfsd->nd_flag & ND_NFSV3); 592 uint32_t reqlen; 593 char *cp2; 594 struct mbuf *mb, *mreq; 595 struct mbuf *m2; 596 struct vnode *vp; 597 nfsfh_t nfh; 598 fhandle_t *fhp; 599 struct uio io, *uiop = &io; 600 struct vattr va; 601 off_t off; 602 u_quad_t frev; 603 604 fhp = &nfh.fh_generic; 605 nfsm_srvmtofh(fhp); 606 if (v3) { 607 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 608 off = fxdr_hyper(tl); 609 } else { 610 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 611 off = (off_t)fxdr_unsigned(u_int32_t, *tl); 612 } 613 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 614 reqlen = fxdr_unsigned(uint32_t, *tl); 615 reqlen = MIN(reqlen, NFS_SRVMAXDATA(nfsd)); 616 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 617 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 618 if (error) { 619 nfsm_reply(2 * NFSX_UNSIGNED); 620 nfsm_srvpostop_attr(1, (struct vattr *)0); 621 return (0); 622 } 623 if (vp->v_type != VREG) { 624 if (v3) 625 error = EINVAL; 626 else 627 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 628 } 629 if (!error) { 630 nqsrv_getl(vp, ND_READ); 631 if ((error = nfsrv_access(vp, VREAD, cred, rdonly, procp, 1)) != 0) 632 error = nfsrv_access(vp, VEXEC, cred, rdonly, procp, 1); 633 } 634 getret = VOP_GETATTR(vp, &va, cred, procp); 635 if (!error) 636 error = getret; 637 if (error) { 638 vput(vp); 639 nfsm_reply(NFSX_POSTOPATTR(v3)); 640 nfsm_srvpostop_attr(getret, &va); 641 return (0); 642 } 643 if (off >= va.va_size) 644 cnt = 0; 645 else if ((off + reqlen) > va.va_size) 646 cnt = nfsm_rndup(va.va_size - off); 647 else 648 cnt = reqlen; 649 nfsm_reply(NFSX_POSTOPORFATTR(v3) + 3 * NFSX_UNSIGNED+nfsm_rndup(cnt)); 650 if (v3) { 651 nfsm_build(tl, u_int32_t *, NFSX_V3FATTR + 4 * NFSX_UNSIGNED); 652 *tl++ = nfs_true; 653 fp = (struct nfs_fattr *)tl; 654 tl += (NFSX_V3FATTR / sizeof (u_int32_t)); 655 } else { 656 nfsm_build(tl, u_int32_t *, NFSX_V2FATTR + NFSX_UNSIGNED); 657 fp = (struct nfs_fattr *)tl; 658 tl += (NFSX_V2FATTR / sizeof (u_int32_t)); 659 } 660 len = left = cnt; 661 if (cnt > 0) { 662 /* 663 * Generate the mbuf list with the uio_iov ref. to it. 664 */ 665 i = 0; 666 m = m2 = mb; 667 while (left > 0) { 668 siz = min(M_TRAILINGSPACE(m), left); 669 if (siz > 0) { 670 left -= siz; 671 i++; 672 } 673 if (left > 0) { 674 m = m_get(M_WAIT, MT_DATA); 675 MCLAIM(m, &nfs_mowner); 676 m_clget(m, M_WAIT); 677 m->m_len = 0; 678 m2->m_next = m; 679 m2 = m; 680 } 681 } 682 iv = malloc(i * sizeof (struct iovec), M_TEMP, M_WAITOK); 683 uiop->uio_iov = iv2 = iv; 684 m = mb; 685 left = cnt; 686 i = 0; 687 while (left > 0) { 688 if (m == NULL) 689 panic("nfsrv_read iov"); 690 siz = min(M_TRAILINGSPACE(m), left); 691 if (siz > 0) { 692 iv->iov_base = mtod(m, caddr_t) + m->m_len; 693 iv->iov_len = siz; 694 m->m_len += siz; 695 left -= siz; 696 iv++; 697 i++; 698 } 699 m = m->m_next; 700 } 701 uiop->uio_iovcnt = i; 702 uiop->uio_offset = off; 703 uiop->uio_resid = cnt; 704 uiop->uio_rw = UIO_READ; 705 uiop->uio_segflg = UIO_SYSSPACE; 706 error = VOP_READ(vp, uiop, IO_NODELOCKED, cred); 707 off = uiop->uio_offset; 708 free((caddr_t)iv2, M_TEMP); 709 if (error || (getret = VOP_GETATTR(vp, &va, cred, procp)) != 0){ 710 if (!error) 711 error = getret; 712 m_freem(mreq); 713 vput(vp); 714 nfsm_reply(NFSX_POSTOPATTR(v3)); 715 nfsm_srvpostop_attr(getret, &va); 716 return (0); 717 } 718 } else 719 uiop->uio_resid = 0; 720 vput(vp); 721 nfsm_srvfillattr(&va, fp); 722 len -= uiop->uio_resid; 723 tlen = nfsm_rndup(len); 724 if (cnt != tlen || tlen != len) 725 nfsm_adj(mb, cnt - tlen, tlen - len); 726 if (v3) { 727 *tl++ = txdr_unsigned(len); 728 if (len < reqlen) 729 *tl++ = nfs_true; 730 else 731 *tl++ = nfs_false; 732 } 733 *tl = txdr_unsigned(len); 734 nfsm_srvdone; 735 } 736 737 /* 738 * nfs write service 739 */ 740 int 741 nfsrv_write(nfsd, slp, procp, mrq) 742 struct nfsrv_descript *nfsd; 743 struct nfssvc_sock *slp; 744 struct proc *procp; 745 struct mbuf **mrq; 746 { 747 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 748 struct mbuf *nam = nfsd->nd_nam; 749 caddr_t dpos = nfsd->nd_dpos; 750 struct ucred *cred = &nfsd->nd_cr; 751 struct iovec *ivp; 752 int i, cnt; 753 struct mbuf *mp; 754 struct nfs_fattr *fp; 755 struct iovec *iv; 756 struct vattr va, forat; 757 u_int32_t *tl; 758 int32_t t1; 759 caddr_t bpos; 760 int error = 0, rdonly, cache, len, forat_ret = 1; 761 int ioflags, aftat_ret = 1, retlen, zeroing, adjust; 762 int stable = NFSV3WRITE_FILESYNC; 763 int v3 = (nfsd->nd_flag & ND_NFSV3); 764 char *cp2; 765 struct mbuf *mb, *mreq; 766 struct vnode *vp; 767 nfsfh_t nfh; 768 fhandle_t *fhp; 769 struct uio io, *uiop = &io; 770 off_t off; 771 u_quad_t frev; 772 773 if (mrep == NULL) { 774 *mrq = NULL; 775 return (0); 776 } 777 fhp = &nfh.fh_generic; 778 nfsm_srvmtofh(fhp); 779 if (v3) { 780 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 781 off = fxdr_hyper(tl); 782 tl += 3; 783 stable = fxdr_unsigned(int, *tl++); 784 } else { 785 nfsm_dissect(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 786 off = (off_t)fxdr_unsigned(u_int32_t, *++tl); 787 tl += 2; 788 } 789 retlen = len = fxdr_unsigned(int32_t, *tl); 790 cnt = i = 0; 791 792 /* 793 * For NFS Version 2, it is not obvious what a write of zero length 794 * should do, but I might as well be consistent with Version 3, 795 * which is to return ok so long as there are no permission problems. 796 */ 797 if (len > 0) { 798 zeroing = 1; 799 mp = mrep; 800 while (mp) { 801 if (mp == md) { 802 zeroing = 0; 803 adjust = dpos - mtod(mp, caddr_t); 804 mp->m_len -= adjust; 805 if (mp->m_len > 0 && adjust > 0) 806 NFSMADV(mp, adjust); 807 } 808 if (zeroing) 809 mp->m_len = 0; 810 else if (mp->m_len > 0) { 811 i += mp->m_len; 812 if (i > len) { 813 mp->m_len -= (i - len); 814 zeroing = 1; 815 } 816 if (mp->m_len > 0) 817 cnt++; 818 } 819 mp = mp->m_next; 820 } 821 } 822 if (len > NFS_MAXDATA || len < 0 || i < len) { 823 error = EIO; 824 nfsm_reply(2 * NFSX_UNSIGNED); 825 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 826 return (0); 827 } 828 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 829 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 830 if (error) { 831 nfsm_reply(2 * NFSX_UNSIGNED); 832 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 833 return (0); 834 } 835 if (v3) 836 forat_ret = VOP_GETATTR(vp, &forat, cred, procp); 837 if (vp->v_type != VREG) { 838 if (v3) 839 error = EINVAL; 840 else 841 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 842 } 843 if (!error) { 844 nqsrv_getl(vp, ND_WRITE); 845 error = nfsrv_access(vp, VWRITE, cred, rdonly, procp, 1); 846 } 847 if (error) { 848 vput(vp); 849 nfsm_reply(NFSX_WCCDATA(v3)); 850 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 851 return (0); 852 } 853 854 if (len > 0) { 855 ivp = malloc(cnt * sizeof (struct iovec), M_TEMP, M_WAITOK); 856 uiop->uio_iov = iv = ivp; 857 uiop->uio_iovcnt = cnt; 858 mp = mrep; 859 while (mp) { 860 if (mp->m_len > 0) { 861 ivp->iov_base = mtod(mp, caddr_t); 862 ivp->iov_len = mp->m_len; 863 ivp++; 864 } 865 mp = mp->m_next; 866 } 867 868 /* 869 * XXX 870 * The IO_METASYNC flag indicates that all metadata (and not just 871 * enough to ensure data integrity) mus be written to stable storage 872 * synchronously. 873 * (IO_METASYNC is not yet implemented in 4.4BSD-Lite.) 874 */ 875 if (stable == NFSV3WRITE_UNSTABLE) 876 ioflags = IO_NODELOCKED; 877 else if (stable == NFSV3WRITE_DATASYNC) 878 ioflags = (IO_SYNC | IO_NODELOCKED); 879 else 880 ioflags = (IO_METASYNC | IO_SYNC | IO_NODELOCKED); 881 uiop->uio_resid = len; 882 uiop->uio_rw = UIO_WRITE; 883 uiop->uio_segflg = UIO_SYSSPACE; 884 uiop->uio_procp = (struct proc *)0; 885 uiop->uio_offset = off; 886 error = VOP_WRITE(vp, uiop, ioflags, cred); 887 nfsstats.srvvop_writes++; 888 free((caddr_t)iv, M_TEMP); 889 } 890 aftat_ret = VOP_GETATTR(vp, &va, cred, procp); 891 vput(vp); 892 if (!error) 893 error = aftat_ret; 894 nfsm_reply(NFSX_PREOPATTR(v3) + NFSX_POSTOPORFATTR(v3) + 895 2 * NFSX_UNSIGNED + NFSX_WRITEVERF(v3)); 896 if (v3) { 897 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 898 if (error) 899 return (0); 900 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 901 *tl++ = txdr_unsigned(retlen); 902 if (stable == NFSV3WRITE_UNSTABLE) 903 *tl++ = txdr_unsigned(stable); 904 else 905 *tl++ = txdr_unsigned(NFSV3WRITE_FILESYNC); 906 /* 907 * Actually, there is no need to txdr these fields, 908 * but it may make the values more human readable, 909 * for debugging purposes. 910 */ 911 *tl++ = txdr_unsigned(boottime.tv_sec); 912 *tl = txdr_unsigned(boottime.tv_usec); 913 } else { 914 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 915 nfsm_srvfillattr(&va, fp); 916 } 917 nfsm_srvdone; 918 } 919 920 /* 921 * NFS write service with write gathering support. Called when 922 * nfsrvw_procrastinate > 0. 923 * See: Chet Juszczak, "Improving the Write Performance of an NFS Server", 924 * in Proc. of the Winter 1994 Usenix Conference, pg. 247-259, San Franscisco, 925 * Jan. 1994. 926 */ 927 int 928 nfsrv_writegather(ndp, slp, procp, mrq) 929 struct nfsrv_descript **ndp; 930 struct nfssvc_sock *slp; 931 struct proc *procp; 932 struct mbuf **mrq; 933 { 934 struct iovec *ivp; 935 struct mbuf *mp; 936 struct nfsrv_descript *wp, *nfsd, *owp, *swp; 937 struct nfs_fattr *fp; 938 int i = 0; 939 struct iovec *iov; 940 struct nfsrvw_delayhash *wpp; 941 struct ucred *cred; 942 struct vattr va, forat; 943 u_int32_t *tl; 944 int32_t t1; 945 caddr_t bpos, dpos; 946 int error = 0, rdonly, cache, len = 0, forat_ret = 1; 947 int ioflags, aftat_ret = 1, s, adjust, v3, zeroing; 948 char *cp2; 949 struct mbuf *mb, *mreq, *mrep, *md; 950 struct vnode *vp; 951 struct uio io, *uiop = &io; 952 u_quad_t frev, cur_usec; 953 954 *mrq = NULL; 955 if (*ndp) { 956 nfsd = *ndp; 957 *ndp = NULL; 958 mrep = nfsd->nd_mrep; 959 md = nfsd->nd_md; 960 dpos = nfsd->nd_dpos; 961 cred = &nfsd->nd_cr; 962 v3 = (nfsd->nd_flag & ND_NFSV3); 963 LIST_INIT(&nfsd->nd_coalesce); 964 nfsd->nd_mreq = NULL; 965 nfsd->nd_stable = NFSV3WRITE_FILESYNC; 966 cur_usec = (u_quad_t)time.tv_sec * 1000000 + (u_quad_t)time.tv_usec; 967 nfsd->nd_time = cur_usec + nfsrvw_procrastinate; 968 969 /* 970 * Now, get the write header.. 971 */ 972 nfsm_srvmtofh(&nfsd->nd_fh); 973 if (v3) { 974 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 975 nfsd->nd_off = fxdr_hyper(tl); 976 tl += 3; 977 nfsd->nd_stable = fxdr_unsigned(int, *tl++); 978 } else { 979 nfsm_dissect(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 980 nfsd->nd_off = (off_t)fxdr_unsigned(u_int32_t, *++tl); 981 tl += 2; 982 } 983 len = fxdr_unsigned(int32_t, *tl); 984 nfsd->nd_len = len; 985 nfsd->nd_eoff = nfsd->nd_off + len; 986 987 /* 988 * Trim the header out of the mbuf list and trim off any trailing 989 * junk so that the mbuf list has only the write data. 990 */ 991 zeroing = 1; 992 i = 0; 993 mp = mrep; 994 while (mp) { 995 if (mp == md) { 996 zeroing = 0; 997 adjust = dpos - mtod(mp, caddr_t); 998 mp->m_len -= adjust; 999 if (mp->m_len > 0 && adjust > 0) 1000 NFSMADV(mp, adjust); 1001 } 1002 if (zeroing) 1003 mp->m_len = 0; 1004 else { 1005 i += mp->m_len; 1006 if (i > len) { 1007 mp->m_len -= (i - len); 1008 zeroing = 1; 1009 } 1010 } 1011 mp = mp->m_next; 1012 } 1013 if (len > NFS_MAXDATA || len < 0 || i < len) { 1014 nfsmout: 1015 m_freem(mrep); 1016 error = EIO; 1017 nfsm_writereply(2 * NFSX_UNSIGNED, v3); 1018 if (v3) 1019 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1020 nfsd->nd_mreq = mreq; 1021 nfsd->nd_mrep = NULL; 1022 nfsd->nd_time = 0; 1023 } 1024 1025 /* 1026 * Add this entry to the hash and time queues. 1027 */ 1028 s = splsoftclock(); 1029 owp = NULL; 1030 wp = LIST_FIRST(&slp->ns_tq); 1031 while (wp && wp->nd_time < nfsd->nd_time) { 1032 owp = wp; 1033 wp = LIST_NEXT(wp, nd_tq); 1034 } 1035 if (owp) { 1036 LIST_INSERT_AFTER(owp, nfsd, nd_tq); 1037 } else { 1038 LIST_INSERT_HEAD(&slp->ns_tq, nfsd, nd_tq); 1039 } 1040 if (nfsd->nd_mrep) { 1041 wpp = NWDELAYHASH(slp, nfsd->nd_fh.fh_fid.fid_data); 1042 owp = NULL; 1043 wp = LIST_FIRST(wpp); 1044 while (wp && 1045 memcmp((caddr_t)&nfsd->nd_fh, (caddr_t)&wp->nd_fh, NFSX_V3FH)) { 1046 owp = wp; 1047 wp = LIST_NEXT(wp, nd_hash); 1048 } 1049 while (wp && wp->nd_off < nfsd->nd_off && 1050 !memcmp((caddr_t)&nfsd->nd_fh, (caddr_t)&wp->nd_fh, NFSX_V3FH)) { 1051 owp = wp; 1052 wp = LIST_NEXT(wp, nd_hash); 1053 } 1054 if (owp) { 1055 LIST_INSERT_AFTER(owp, nfsd, nd_hash); 1056 1057 /* 1058 * Search the hash list for overlapping entries and 1059 * coalesce. 1060 */ 1061 for(; nfsd && NFSW_CONTIG(owp, nfsd); nfsd = wp) { 1062 wp = LIST_NEXT(nfsd, nd_hash); 1063 if (NFSW_SAMECRED(owp, nfsd)) 1064 nfsrvw_coalesce(owp, nfsd); 1065 } 1066 } else { 1067 LIST_INSERT_HEAD(wpp, nfsd, nd_hash); 1068 } 1069 } 1070 splx(s); 1071 } 1072 1073 /* 1074 * Now, do VOP_WRITE()s for any one(s) that need to be done now 1075 * and generate the associated reply mbuf list(s). 1076 */ 1077 loop1: 1078 cur_usec = (u_quad_t)time.tv_sec * 1000000 + (u_quad_t)time.tv_usec; 1079 s = splsoftclock(); 1080 for (nfsd = LIST_FIRST(&slp->ns_tq); nfsd; nfsd = owp) { 1081 owp = LIST_NEXT(nfsd, nd_tq); 1082 if (nfsd->nd_time > cur_usec) 1083 break; 1084 if (nfsd->nd_mreq) 1085 continue; 1086 LIST_REMOVE(nfsd, nd_tq); 1087 LIST_REMOVE(nfsd, nd_hash); 1088 splx(s); 1089 mrep = nfsd->nd_mrep; 1090 nfsd->nd_mrep = NULL; 1091 cred = &nfsd->nd_cr; 1092 v3 = (nfsd->nd_flag & ND_NFSV3); 1093 forat_ret = aftat_ret = 1; 1094 error = nfsrv_fhtovp(&nfsd->nd_fh, 1, &vp, cred, slp, 1095 nfsd->nd_nam, &rdonly, (nfsd->nd_flag & ND_KERBAUTH), 1096 FALSE); 1097 if (!error) { 1098 if (v3) 1099 forat_ret = VOP_GETATTR(vp, &forat, cred, procp); 1100 if (vp->v_type != VREG) { 1101 if (v3) 1102 error = EINVAL; 1103 else 1104 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 1105 } 1106 } else 1107 vp = NULL; 1108 if (!error) { 1109 nqsrv_getl(vp, ND_WRITE); 1110 error = nfsrv_access(vp, VWRITE, cred, rdonly, procp, 1); 1111 } 1112 1113 if (nfsd->nd_stable == NFSV3WRITE_UNSTABLE) 1114 ioflags = IO_NODELOCKED; 1115 else if (nfsd->nd_stable == NFSV3WRITE_DATASYNC) 1116 ioflags = (IO_SYNC | IO_NODELOCKED); 1117 else 1118 ioflags = (IO_METASYNC | IO_SYNC | IO_NODELOCKED); 1119 uiop->uio_rw = UIO_WRITE; 1120 uiop->uio_segflg = UIO_SYSSPACE; 1121 uiop->uio_procp = (struct proc *)0; 1122 uiop->uio_offset = nfsd->nd_off; 1123 uiop->uio_resid = nfsd->nd_eoff - nfsd->nd_off; 1124 if (uiop->uio_resid > 0) { 1125 mp = mrep; 1126 i = 0; 1127 while (mp) { 1128 if (mp->m_len > 0) 1129 i++; 1130 mp = mp->m_next; 1131 } 1132 uiop->uio_iovcnt = i; 1133 iov = malloc(i * sizeof (struct iovec), M_TEMP, M_WAITOK); 1134 uiop->uio_iov = ivp = iov; 1135 mp = mrep; 1136 while (mp) { 1137 if (mp->m_len > 0) { 1138 ivp->iov_base = mtod(mp, caddr_t); 1139 ivp->iov_len = mp->m_len; 1140 ivp++; 1141 } 1142 mp = mp->m_next; 1143 } 1144 if (!error) { 1145 error = VOP_WRITE(vp, uiop, ioflags, cred); 1146 nfsstats.srvvop_writes++; 1147 } 1148 free((caddr_t)iov, M_TEMP); 1149 } 1150 m_freem(mrep); 1151 if (vp) { 1152 aftat_ret = VOP_GETATTR(vp, &va, cred, procp); 1153 vput(vp); 1154 } 1155 1156 /* 1157 * Loop around generating replies for all write rpcs that have 1158 * now been completed. 1159 */ 1160 swp = nfsd; 1161 do { 1162 if (error) { 1163 nfsm_writereply(NFSX_WCCDATA(v3), v3); 1164 if (v3) { 1165 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1166 } 1167 } else { 1168 nfsm_writereply(NFSX_PREOPATTR(v3) + 1169 NFSX_POSTOPORFATTR(v3) + 2 * NFSX_UNSIGNED + 1170 NFSX_WRITEVERF(v3), v3); 1171 if (v3) { 1172 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1173 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1174 *tl++ = txdr_unsigned(nfsd->nd_len); 1175 *tl++ = txdr_unsigned(swp->nd_stable); 1176 /* 1177 * Actually, there is no need to txdr these fields, 1178 * but it may make the values more human readable, 1179 * for debugging purposes. 1180 */ 1181 *tl++ = txdr_unsigned(boottime.tv_sec); 1182 *tl = txdr_unsigned(boottime.tv_usec); 1183 } else { 1184 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 1185 nfsm_srvfillattr(&va, fp); 1186 } 1187 } 1188 nfsd->nd_mreq = mreq; 1189 if (nfsd->nd_mrep) 1190 panic("nfsrv_write: nd_mrep not free"); 1191 1192 /* 1193 * Done. Put it at the head of the timer queue so that 1194 * the final phase can return the reply. 1195 */ 1196 s = splsoftclock(); 1197 if (nfsd != swp) { 1198 nfsd->nd_time = 0; 1199 LIST_INSERT_HEAD(&slp->ns_tq, nfsd, nd_tq); 1200 } 1201 nfsd = LIST_FIRST(&swp->nd_coalesce); 1202 if (nfsd) { 1203 LIST_REMOVE(nfsd, nd_tq); 1204 } 1205 splx(s); 1206 } while (nfsd); 1207 s = splsoftclock(); 1208 swp->nd_time = 0; 1209 LIST_INSERT_HEAD(&slp->ns_tq, swp, nd_tq); 1210 splx(s); 1211 goto loop1; 1212 } 1213 splx(s); 1214 1215 /* 1216 * Search for a reply to return. 1217 */ 1218 s = splsoftclock(); 1219 LIST_FOREACH(nfsd, &slp->ns_tq, nd_tq) { 1220 if (nfsd->nd_mreq) { 1221 LIST_REMOVE(nfsd, nd_tq); 1222 *mrq = nfsd->nd_mreq; 1223 *ndp = nfsd; 1224 break; 1225 } 1226 } 1227 splx(s); 1228 return (0); 1229 } 1230 1231 /* 1232 * Coalesce the write request nfsd into owp. To do this we must: 1233 * - remove nfsd from the queues 1234 * - merge nfsd->nd_mrep into owp->nd_mrep 1235 * - update the nd_eoff and nd_stable for owp 1236 * - put nfsd on owp's nd_coalesce list 1237 * NB: Must be called at splsoftclock(). 1238 */ 1239 void 1240 nfsrvw_coalesce(owp, nfsd) 1241 struct nfsrv_descript *owp; 1242 struct nfsrv_descript *nfsd; 1243 { 1244 int overlap; 1245 struct mbuf *mp; 1246 struct nfsrv_descript *m; 1247 1248 LIST_REMOVE(nfsd, nd_hash); 1249 LIST_REMOVE(nfsd, nd_tq); 1250 if (owp->nd_eoff < nfsd->nd_eoff) { 1251 overlap = owp->nd_eoff - nfsd->nd_off; 1252 if (overlap < 0) 1253 panic("nfsrv_coalesce: bad off"); 1254 if (overlap > 0) 1255 m_adj(nfsd->nd_mrep, overlap); 1256 mp = owp->nd_mrep; 1257 while (mp->m_next) 1258 mp = mp->m_next; 1259 mp->m_next = nfsd->nd_mrep; 1260 owp->nd_eoff = nfsd->nd_eoff; 1261 } else 1262 m_freem(nfsd->nd_mrep); 1263 nfsd->nd_mrep = NULL; 1264 if (nfsd->nd_stable == NFSV3WRITE_FILESYNC) 1265 owp->nd_stable = NFSV3WRITE_FILESYNC; 1266 else if (nfsd->nd_stable == NFSV3WRITE_DATASYNC && 1267 owp->nd_stable == NFSV3WRITE_UNSTABLE) 1268 owp->nd_stable = NFSV3WRITE_DATASYNC; 1269 LIST_INSERT_HEAD(&owp->nd_coalesce, nfsd, nd_tq); 1270 /* 1271 * nfsd might hold coalesce elements! Move them to owp. 1272 * Otherwise, requests may be lost and clients will be stuck. 1273 */ 1274 while ((m = LIST_FIRST(&nfsd->nd_coalesce)) != NULL) { 1275 LIST_REMOVE(m, nd_tq); 1276 LIST_INSERT_HEAD(&owp->nd_coalesce, m, nd_tq); 1277 } 1278 } 1279 1280 /* 1281 * nfs create service 1282 * now does a truncate to 0 length via. setattr if it already exists 1283 */ 1284 int 1285 nfsrv_create(nfsd, slp, procp, mrq) 1286 struct nfsrv_descript *nfsd; 1287 struct nfssvc_sock *slp; 1288 struct proc *procp; 1289 struct mbuf **mrq; 1290 { 1291 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1292 struct mbuf *nam = nfsd->nd_nam; 1293 caddr_t dpos = nfsd->nd_dpos; 1294 struct ucred *cred = &nfsd->nd_cr; 1295 struct nfs_fattr *fp; 1296 struct vattr va, dirfor, diraft; 1297 struct nfsv2_sattr *sp; 1298 u_int32_t *tl; 1299 struct nameidata nd; 1300 caddr_t cp; 1301 int32_t t1; 1302 caddr_t bpos; 1303 int error = 0, cache, len, tsize, dirfor_ret = 1, diraft_ret = 1; 1304 int rdev = 0; 1305 int v3 = (nfsd->nd_flag & ND_NFSV3), how, exclusive_flag = 0; 1306 char *cp2; 1307 struct mbuf *mb, *mreq; 1308 struct vnode *vp = NULL, *dirp = NULL; 1309 nfsfh_t nfh; 1310 fhandle_t *fhp; 1311 u_quad_t frev, tempsize; 1312 u_char cverf[NFSX_V3CREATEVERF]; 1313 1314 nd.ni_cnd.cn_nameiop = 0; 1315 fhp = &nfh.fh_generic; 1316 nfsm_srvmtofh(fhp); 1317 nfsm_srvnamesiz(len); 1318 nd.ni_cnd.cn_cred = cred; 1319 nd.ni_cnd.cn_nameiop = CREATE; 1320 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 1321 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 1322 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1323 if (dirp) { 1324 if (v3) 1325 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 1326 procp); 1327 else { 1328 vrele(dirp); 1329 dirp = (struct vnode *)0; 1330 } 1331 } 1332 if (error) { 1333 nfsm_reply(NFSX_WCCDATA(v3)); 1334 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1335 if (dirp) 1336 vrele(dirp); 1337 return (0); 1338 } 1339 VATTR_NULL(&va); 1340 if (v3) { 1341 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1342 how = fxdr_unsigned(int, *tl); 1343 switch (how) { 1344 case NFSV3CREATE_GUARDED: 1345 if (nd.ni_vp) { 1346 error = EEXIST; 1347 break; 1348 } 1349 case NFSV3CREATE_UNCHECKED: 1350 nfsm_srvsattr(&va); 1351 break; 1352 case NFSV3CREATE_EXCLUSIVE: 1353 nfsm_dissect(cp, caddr_t, NFSX_V3CREATEVERF); 1354 memcpy(cverf, cp, NFSX_V3CREATEVERF); 1355 exclusive_flag = 1; 1356 if (nd.ni_vp == NULL) 1357 va.va_mode = 0; 1358 break; 1359 }; 1360 va.va_type = VREG; 1361 } else { 1362 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1363 va.va_type = IFTOVT(fxdr_unsigned(u_int32_t, sp->sa_mode)); 1364 if (va.va_type == VNON) 1365 va.va_type = VREG; 1366 va.va_mode = nfstov_mode(sp->sa_mode); 1367 switch (va.va_type) { 1368 case VREG: 1369 tsize = fxdr_unsigned(int32_t, sp->sa_size); 1370 if (tsize != -1) 1371 va.va_size = (u_quad_t)tsize; 1372 break; 1373 case VCHR: 1374 case VBLK: 1375 case VFIFO: 1376 rdev = fxdr_unsigned(int32_t, sp->sa_size); 1377 break; 1378 default: 1379 break; 1380 }; 1381 } 1382 1383 /* 1384 * Iff doesn't exist, create it 1385 * otherwise just truncate to 0 length 1386 * should I set the mode too ?? 1387 */ 1388 if (nd.ni_vp == NULL) { 1389 if (va.va_type == VREG || va.va_type == VSOCK) { 1390 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1391 error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1392 if (!error) { 1393 if (exclusive_flag) { 1394 exclusive_flag = 0; 1395 VATTR_NULL(&va); 1396 memcpy((caddr_t)&va.va_atime, cverf, 1397 NFSX_V3CREATEVERF); 1398 error = VOP_SETATTR(nd.ni_vp, &va, cred, 1399 procp); 1400 } 1401 } 1402 } else if (va.va_type == VCHR || va.va_type == VBLK || 1403 va.va_type == VFIFO) { 1404 if (va.va_type == VCHR && rdev == 0xffffffff) 1405 va.va_type = VFIFO; 1406 if (va.va_type != VFIFO && 1407 (error = suser(cred, (u_short *)0))) { 1408 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1409 vput(nd.ni_dvp); 1410 nfsm_reply(0); 1411 return (error); 1412 } else 1413 va.va_rdev = (dev_t)rdev; 1414 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1415 error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, 1416 &va); 1417 if (error) { 1418 nfsm_reply(0); 1419 } 1420 if (nd.ni_cnd.cn_flags & ISSYMLINK) { 1421 vrele(nd.ni_dvp); 1422 vput(nd.ni_vp); 1423 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1424 error = EINVAL; 1425 nfsm_reply(0); 1426 } 1427 } else { 1428 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1429 vput(nd.ni_dvp); 1430 error = ENXIO; 1431 } 1432 vp = nd.ni_vp; 1433 } else { 1434 vp = nd.ni_vp; 1435 if (nd.ni_dvp == vp) 1436 vrele(nd.ni_dvp); 1437 else 1438 vput(nd.ni_dvp); 1439 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1440 if (!error && va.va_size != -1) { 1441 error = nfsrv_access(vp, VWRITE, cred, 1442 (nd.ni_cnd.cn_flags & RDONLY), procp, 0); 1443 if (!error) { 1444 nqsrv_getl(vp, ND_WRITE); 1445 tempsize = va.va_size; 1446 VATTR_NULL(&va); 1447 va.va_size = tempsize; 1448 error = VOP_SETATTR(vp, &va, cred, 1449 procp); 1450 } 1451 } 1452 if (error) 1453 vput(vp); 1454 } 1455 if (!error) { 1456 memset((caddr_t)fhp, 0, sizeof(nfh)); 1457 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; 1458 error = VFS_VPTOFH(vp, &fhp->fh_fid); 1459 if (!error) 1460 error = VOP_GETATTR(vp, &va, cred, procp); 1461 vput(vp); 1462 } 1463 if (v3) { 1464 if (exclusive_flag && !error && 1465 memcmp(cverf, (caddr_t)&va.va_atime, NFSX_V3CREATEVERF)) 1466 error = EEXIST; 1467 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 1468 vrele(dirp); 1469 } 1470 nfsm_reply(NFSX_SRVFH(v3) + NFSX_FATTR(v3) + NFSX_WCCDATA(v3)); 1471 if (v3) { 1472 if (!error) { 1473 nfsm_srvpostop_fh(fhp); 1474 nfsm_srvpostop_attr(0, &va); 1475 } 1476 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1477 } else { 1478 nfsm_srvfhtom(fhp, v3); 1479 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 1480 nfsm_srvfillattr(&va, fp); 1481 } 1482 return (0); 1483 nfsmout: 1484 if (dirp) 1485 vrele(dirp); 1486 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1487 if (nd.ni_dvp == nd.ni_vp) 1488 vrele(nd.ni_dvp); 1489 else 1490 vput(nd.ni_dvp); 1491 if (nd.ni_vp) 1492 vput(nd.ni_vp); 1493 return (error); 1494 } 1495 1496 /* 1497 * nfs v3 mknod service 1498 */ 1499 int 1500 nfsrv_mknod(nfsd, slp, procp, mrq) 1501 struct nfsrv_descript *nfsd; 1502 struct nfssvc_sock *slp; 1503 struct proc *procp; 1504 struct mbuf **mrq; 1505 { 1506 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1507 struct mbuf *nam = nfsd->nd_nam; 1508 caddr_t dpos = nfsd->nd_dpos; 1509 struct ucred *cred = &nfsd->nd_cr; 1510 struct vattr va, dirfor, diraft; 1511 u_int32_t *tl; 1512 struct nameidata nd; 1513 int32_t t1; 1514 caddr_t bpos; 1515 int error = 0, cache, len, dirfor_ret = 1, diraft_ret = 1; 1516 u_int32_t major, minor; 1517 enum vtype vtyp; 1518 char *cp2; 1519 struct mbuf *mb, *mreq; 1520 struct vnode *vp, *dirp = (struct vnode *)0; 1521 nfsfh_t nfh; 1522 fhandle_t *fhp; 1523 u_quad_t frev; 1524 1525 nd.ni_cnd.cn_nameiop = 0; 1526 fhp = &nfh.fh_generic; 1527 nfsm_srvmtofh(fhp); 1528 nfsm_srvnamesiz(len); 1529 nd.ni_cnd.cn_cred = cred; 1530 nd.ni_cnd.cn_nameiop = CREATE; 1531 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 1532 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 1533 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1534 if (dirp) 1535 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, procp); 1536 if (error) { 1537 nfsm_reply(NFSX_WCCDATA(1)); 1538 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1539 if (dirp) 1540 vrele(dirp); 1541 return (0); 1542 } 1543 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1544 vtyp = nfsv3tov_type(*tl); 1545 if (vtyp != VCHR && vtyp != VBLK && vtyp != VSOCK && vtyp != VFIFO) { 1546 error = NFSERR_BADTYPE; 1547 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1548 if (nd.ni_dvp == nd.ni_vp) 1549 vrele(nd.ni_dvp); 1550 else 1551 vput(nd.ni_dvp); 1552 if (nd.ni_vp) 1553 vput(nd.ni_vp); 1554 goto out; 1555 } 1556 VATTR_NULL(&va); 1557 nfsm_srvsattr(&va); 1558 if (vtyp == VCHR || vtyp == VBLK) { 1559 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1560 major = fxdr_unsigned(u_int32_t, *tl++); 1561 minor = fxdr_unsigned(u_int32_t, *tl); 1562 va.va_rdev = makedev(major, minor); 1563 } 1564 1565 /* 1566 * Iff doesn't exist, create it. 1567 */ 1568 if (nd.ni_vp) { 1569 error = EEXIST; 1570 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1571 if (nd.ni_dvp == nd.ni_vp) 1572 vrele(nd.ni_dvp); 1573 else 1574 vput(nd.ni_dvp); 1575 vput(nd.ni_vp); 1576 goto out; 1577 } 1578 va.va_type = vtyp; 1579 if (vtyp == VSOCK) { 1580 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1581 error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1582 } else { 1583 if (va.va_type != VFIFO && 1584 (error = suser(cred, (u_short *)0))) { 1585 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1586 vput(nd.ni_dvp); 1587 goto out; 1588 } 1589 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1590 error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1591 if (error) { 1592 goto out; 1593 } 1594 if (error) 1595 goto out; 1596 if (nd.ni_cnd.cn_flags & ISSYMLINK) { 1597 vput(nd.ni_vp); 1598 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1599 error = EINVAL; 1600 } 1601 } 1602 out: 1603 vp = nd.ni_vp; 1604 if (!error) { 1605 memset((caddr_t)fhp, 0, sizeof(nfh)); 1606 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; 1607 error = VFS_VPTOFH(vp, &fhp->fh_fid); 1608 if (!error) 1609 error = VOP_GETATTR(vp, &va, cred, procp); 1610 vput(vp); 1611 } 1612 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 1613 vrele(dirp); 1614 nfsm_reply(NFSX_SRVFH(1) + NFSX_POSTOPATTR(1) + NFSX_WCCDATA(1)); 1615 if (!error) { 1616 nfsm_srvpostop_fh(fhp); 1617 nfsm_srvpostop_attr(0, &va); 1618 } 1619 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1620 return (0); 1621 nfsmout: 1622 if (dirp) 1623 vrele(dirp); 1624 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1625 if (nd.ni_dvp == nd.ni_vp) 1626 vrele(nd.ni_dvp); 1627 else 1628 vput(nd.ni_dvp); 1629 if (nd.ni_vp) 1630 vput(nd.ni_vp); 1631 return (error); 1632 } 1633 1634 /* 1635 * nfs remove service 1636 */ 1637 int 1638 nfsrv_remove(nfsd, slp, procp, mrq) 1639 struct nfsrv_descript *nfsd; 1640 struct nfssvc_sock *slp; 1641 struct proc *procp; 1642 struct mbuf **mrq; 1643 { 1644 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1645 struct mbuf *nam = nfsd->nd_nam; 1646 caddr_t dpos = nfsd->nd_dpos; 1647 struct ucred *cred = &nfsd->nd_cr; 1648 struct nameidata nd; 1649 u_int32_t *tl; 1650 int32_t t1; 1651 caddr_t bpos; 1652 int error = 0, cache, len, dirfor_ret = 1, diraft_ret = 1; 1653 int v3 = (nfsd->nd_flag & ND_NFSV3); 1654 char *cp2; 1655 struct mbuf *mb, *mreq; 1656 struct vnode *vp, *dirp; 1657 struct vattr dirfor, diraft; 1658 nfsfh_t nfh; 1659 fhandle_t *fhp; 1660 u_quad_t frev; 1661 1662 #ifndef nolint 1663 vp = (struct vnode *)0; 1664 #endif 1665 fhp = &nfh.fh_generic; 1666 nfsm_srvmtofh(fhp); 1667 nfsm_srvnamesiz(len); 1668 nd.ni_cnd.cn_cred = cred; 1669 nd.ni_cnd.cn_nameiop = DELETE; 1670 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 1671 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 1672 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1673 if (dirp) { 1674 if (v3) 1675 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 1676 procp); 1677 else 1678 vrele(dirp); 1679 } 1680 if (!error) { 1681 vp = nd.ni_vp; 1682 if (vp->v_type == VDIR && 1683 (error = suser(cred, (u_short *)0)) != 0) 1684 goto out; 1685 /* 1686 * The root of a mounted filesystem cannot be deleted. 1687 */ 1688 if (vp->v_flag & VROOT) { 1689 error = EBUSY; 1690 goto out; 1691 } 1692 out: 1693 if (!error) { 1694 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1695 nqsrv_getl(vp, ND_WRITE); 1696 error = VOP_REMOVE(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); 1697 } else { 1698 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1699 if (nd.ni_dvp == vp) 1700 vrele(nd.ni_dvp); 1701 else 1702 vput(nd.ni_dvp); 1703 vput(vp); 1704 } 1705 } 1706 if (dirp && v3) { 1707 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 1708 vrele(dirp); 1709 } 1710 nfsm_reply(NFSX_WCCDATA(v3)); 1711 if (v3) { 1712 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1713 return (0); 1714 } 1715 nfsm_srvdone; 1716 } 1717 1718 /* 1719 * nfs rename service 1720 */ 1721 int 1722 nfsrv_rename(nfsd, slp, procp, mrq) 1723 struct nfsrv_descript *nfsd; 1724 struct nfssvc_sock *slp; 1725 struct proc *procp; 1726 struct mbuf **mrq; 1727 { 1728 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1729 struct mbuf *nam = nfsd->nd_nam; 1730 caddr_t dpos = nfsd->nd_dpos; 1731 struct ucred *cred = &nfsd->nd_cr; 1732 u_int32_t *tl; 1733 int32_t t1; 1734 caddr_t bpos; 1735 int error = 0, cache, fdirfor_ret = 1, fdiraft_ret = 1; 1736 uint32_t len, len2; 1737 int tdirfor_ret = 1, tdiraft_ret = 1; 1738 int v3 = (nfsd->nd_flag & ND_NFSV3); 1739 char *cp2; 1740 struct mbuf *mb, *mreq; 1741 struct nameidata fromnd, tond; 1742 struct vnode *fvp, *tvp, *tdvp, *fdirp = (struct vnode *)0; 1743 struct vnode *tdirp = (struct vnode *)0; 1744 struct vattr fdirfor, fdiraft, tdirfor, tdiraft; 1745 nfsfh_t fnfh, tnfh; 1746 fhandle_t *ffhp, *tfhp; 1747 u_quad_t frev; 1748 uid_t saved_uid; 1749 1750 #ifndef nolint 1751 fvp = (struct vnode *)0; 1752 #endif 1753 ffhp = &fnfh.fh_generic; 1754 tfhp = &tnfh.fh_generic; 1755 fromnd.ni_cnd.cn_nameiop = 0; 1756 tond.ni_cnd.cn_nameiop = 0; 1757 nfsm_srvmtofh(ffhp); 1758 nfsm_srvnamesiz(len); 1759 /* 1760 * Remember our original uid so that we can reset cr_uid before 1761 * the second nfs_namei() call, in case it is remapped. 1762 */ 1763 saved_uid = cred->cr_uid; 1764 fromnd.ni_cnd.cn_cred = cred; 1765 fromnd.ni_cnd.cn_nameiop = DELETE; 1766 fromnd.ni_cnd.cn_flags = WANTPARENT | SAVESTART; 1767 error = nfs_namei(&fromnd, ffhp, len, slp, nam, &md, 1768 &dpos, &fdirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1769 if (fdirp) { 1770 if (v3) 1771 fdirfor_ret = VOP_GETATTR(fdirp, &fdirfor, cred, 1772 procp); 1773 else { 1774 vrele(fdirp); 1775 fdirp = (struct vnode *)0; 1776 } 1777 } 1778 if (error) { 1779 nfsm_reply(2 * NFSX_WCCDATA(v3)); 1780 nfsm_srvwcc_data(fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft); 1781 nfsm_srvwcc_data(tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft); 1782 if (fdirp) 1783 vrele(fdirp); 1784 return (0); 1785 } 1786 fvp = fromnd.ni_vp; 1787 nfsm_srvmtofh(tfhp); 1788 if (v3) { 1789 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 1790 len2 = fxdr_unsigned(uint32_t, *tl); 1791 /* len2 will be checked by nfs_namei */ 1792 } 1793 else { 1794 /* NFSv2 */ 1795 nfsm_strsiz(len2, NFS_MAXNAMLEN); 1796 } 1797 cred->cr_uid = saved_uid; 1798 tond.ni_cnd.cn_cred = cred; 1799 tond.ni_cnd.cn_nameiop = RENAME; 1800 tond.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF | NOCACHE | SAVESTART; 1801 error = nfs_namei(&tond, tfhp, len2, slp, nam, &md, 1802 &dpos, &tdirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1803 if (tdirp) { 1804 if (v3) 1805 tdirfor_ret = VOP_GETATTR(tdirp, &tdirfor, cred, 1806 procp); 1807 else { 1808 vrele(tdirp); 1809 tdirp = (struct vnode *)0; 1810 } 1811 } 1812 if (error) { 1813 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 1814 vrele(fromnd.ni_dvp); 1815 vrele(fvp); 1816 goto out1; 1817 } 1818 tdvp = tond.ni_dvp; 1819 tvp = tond.ni_vp; 1820 if (tvp != NULL) { 1821 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 1822 if (v3) 1823 error = EEXIST; 1824 else 1825 error = EISDIR; 1826 goto out; 1827 } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 1828 if (v3) 1829 error = EEXIST; 1830 else 1831 error = ENOTDIR; 1832 goto out; 1833 } 1834 if (tvp->v_type == VDIR && tvp->v_mountedhere) { 1835 if (v3) 1836 error = EXDEV; 1837 else 1838 error = ENOTEMPTY; 1839 goto out; 1840 } 1841 } 1842 if (fvp->v_type == VDIR && fvp->v_mountedhere) { 1843 if (v3) 1844 error = EXDEV; 1845 else 1846 error = ENOTEMPTY; 1847 goto out; 1848 } 1849 if (fvp->v_mount != tdvp->v_mount) { 1850 if (v3) 1851 error = EXDEV; 1852 else 1853 error = ENOTEMPTY; 1854 goto out; 1855 } 1856 if (fvp == tdvp) { 1857 if (v3) 1858 error = EINVAL; 1859 else 1860 error = ENOTEMPTY; 1861 } 1862 /* 1863 * If source is the same as the destination (that is the 1864 * same vnode with the same name in the same directory), 1865 * then there is nothing to do. 1866 */ 1867 if (fvp == tvp && fromnd.ni_dvp == tdvp && 1868 fromnd.ni_cnd.cn_namelen == tond.ni_cnd.cn_namelen && 1869 !memcmp(fromnd.ni_cnd.cn_nameptr, tond.ni_cnd.cn_nameptr, 1870 fromnd.ni_cnd.cn_namelen)) 1871 error = -1; 1872 out: 1873 if (!error) { 1874 nqsrv_getl(fromnd.ni_dvp, ND_WRITE); 1875 nqsrv_getl(tdvp, ND_WRITE); 1876 if (tvp) { 1877 nqsrv_getl(tvp, ND_WRITE); 1878 } 1879 error = VOP_RENAME(fromnd.ni_dvp, fromnd.ni_vp, &fromnd.ni_cnd, 1880 tond.ni_dvp, tond.ni_vp, &tond.ni_cnd); 1881 } else { 1882 VOP_ABORTOP(tond.ni_dvp, &tond.ni_cnd); 1883 if (tdvp == tvp) 1884 vrele(tdvp); 1885 else 1886 vput(tdvp); 1887 if (tvp) 1888 vput(tvp); 1889 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 1890 vrele(fromnd.ni_dvp); 1891 vrele(fvp); 1892 if (error == -1) 1893 error = 0; 1894 } 1895 vrele(tond.ni_startdir); 1896 PNBUF_PUT(tond.ni_cnd.cn_pnbuf); 1897 out1: 1898 if (fdirp) { 1899 fdiraft_ret = VOP_GETATTR(fdirp, &fdiraft, cred, procp); 1900 vrele(fdirp); 1901 } 1902 if (tdirp) { 1903 tdiraft_ret = VOP_GETATTR(tdirp, &tdiraft, cred, procp); 1904 vrele(tdirp); 1905 } 1906 vrele(fromnd.ni_startdir); 1907 PNBUF_PUT(fromnd.ni_cnd.cn_pnbuf); 1908 nfsm_reply(2 * NFSX_WCCDATA(v3)); 1909 if (v3) { 1910 nfsm_srvwcc_data(fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft); 1911 nfsm_srvwcc_data(tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft); 1912 } 1913 return (0); 1914 1915 nfsmout: 1916 if (fdirp) 1917 vrele(fdirp); 1918 if (tdirp) 1919 vrele(tdirp); 1920 if (tond.ni_cnd.cn_nameiop) { 1921 vrele(tond.ni_startdir); 1922 PNBUF_PUT(tond.ni_cnd.cn_pnbuf); 1923 } 1924 if (fromnd.ni_cnd.cn_nameiop) { 1925 vrele(fromnd.ni_startdir); 1926 PNBUF_PUT(fromnd.ni_cnd.cn_pnbuf); 1927 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 1928 vrele(fromnd.ni_dvp); 1929 vrele(fvp); 1930 } 1931 return (error); 1932 } 1933 1934 /* 1935 * nfs link service 1936 */ 1937 int 1938 nfsrv_link(nfsd, slp, procp, mrq) 1939 struct nfsrv_descript *nfsd; 1940 struct nfssvc_sock *slp; 1941 struct proc *procp; 1942 struct mbuf **mrq; 1943 { 1944 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1945 struct mbuf *nam = nfsd->nd_nam; 1946 caddr_t dpos = nfsd->nd_dpos; 1947 struct ucred *cred = &nfsd->nd_cr; 1948 struct nameidata nd; 1949 u_int32_t *tl; 1950 int32_t t1; 1951 caddr_t bpos; 1952 int error = 0, rdonly, cache, len, dirfor_ret = 1, diraft_ret = 1; 1953 int getret = 1, v3 = (nfsd->nd_flag & ND_NFSV3); 1954 char *cp2; 1955 struct mbuf *mb, *mreq; 1956 struct vnode *vp, *xp, *dirp = (struct vnode *)0; 1957 struct vattr dirfor, diraft, at; 1958 nfsfh_t nfh, dnfh; 1959 fhandle_t *fhp, *dfhp; 1960 u_quad_t frev; 1961 1962 fhp = &nfh.fh_generic; 1963 dfhp = &dnfh.fh_generic; 1964 nfsm_srvmtofh(fhp); 1965 nfsm_srvmtofh(dfhp); 1966 nfsm_srvnamesiz(len); 1967 error = nfsrv_fhtovp(fhp, FALSE, &vp, cred, slp, nam, 1968 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1969 if (error) { 1970 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 1971 nfsm_srvpostop_attr(getret, &at); 1972 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1973 return (0); 1974 } 1975 if (vp->v_type == VDIR && (error = suser(cred, (u_short *)0)) != 0) 1976 goto out1; 1977 nd.ni_cnd.cn_cred = cred; 1978 nd.ni_cnd.cn_nameiop = CREATE; 1979 nd.ni_cnd.cn_flags = LOCKPARENT; 1980 error = nfs_namei(&nd, dfhp, len, slp, nam, &md, &dpos, 1981 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1982 if (dirp) { 1983 if (v3) 1984 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 1985 procp); 1986 else { 1987 vrele(dirp); 1988 dirp = (struct vnode *)0; 1989 } 1990 } 1991 if (error) 1992 goto out1; 1993 xp = nd.ni_vp; 1994 if (xp != NULL) { 1995 error = EEXIST; 1996 goto out; 1997 } 1998 xp = nd.ni_dvp; 1999 if (vp->v_mount != xp->v_mount) 2000 error = EXDEV; 2001 out: 2002 if (!error) { 2003 nqsrv_getl(vp, ND_WRITE); 2004 nqsrv_getl(xp, ND_WRITE); 2005 error = VOP_LINK(nd.ni_dvp, vp, &nd.ni_cnd); 2006 } else { 2007 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2008 if (nd.ni_dvp == nd.ni_vp) 2009 vrele(nd.ni_dvp); 2010 else 2011 vput(nd.ni_dvp); 2012 if (nd.ni_vp) 2013 vrele(nd.ni_vp); 2014 } 2015 out1: 2016 if (v3) 2017 getret = VOP_GETATTR(vp, &at, cred, procp); 2018 if (dirp) { 2019 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 2020 vrele(dirp); 2021 } 2022 vrele(vp); 2023 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2024 if (v3) { 2025 nfsm_srvpostop_attr(getret, &at); 2026 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2027 return (0); 2028 } 2029 nfsm_srvdone; 2030 } 2031 2032 /* 2033 * nfs symbolic link service 2034 */ 2035 int 2036 nfsrv_symlink(nfsd, slp, procp, mrq) 2037 struct nfsrv_descript *nfsd; 2038 struct nfssvc_sock *slp; 2039 struct proc *procp; 2040 struct mbuf **mrq; 2041 { 2042 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2043 struct mbuf *nam = nfsd->nd_nam; 2044 caddr_t dpos = nfsd->nd_dpos; 2045 struct ucred *cred = &nfsd->nd_cr; 2046 struct vattr va, dirfor, diraft; 2047 struct nameidata nd; 2048 u_int32_t *tl; 2049 int32_t t1; 2050 struct nfsv2_sattr *sp; 2051 char *bpos, *pathcp = NULL, *cp2; 2052 struct uio io; 2053 struct iovec iv; 2054 int error = 0, cache, dirfor_ret = 1, diraft_ret = 1; 2055 uint32_t len, len2; 2056 int v3 = (nfsd->nd_flag & ND_NFSV3); 2057 struct mbuf *mb, *mreq; 2058 struct vnode *dirp = (struct vnode *)0; 2059 nfsfh_t nfh; 2060 fhandle_t *fhp; 2061 u_quad_t frev; 2062 2063 nd.ni_cnd.cn_nameiop = 0; 2064 fhp = &nfh.fh_generic; 2065 nfsm_srvmtofh(fhp); 2066 nfsm_srvnamesiz(len); 2067 nd.ni_cnd.cn_cred = cred; 2068 nd.ni_cnd.cn_nameiop = CREATE; 2069 nd.ni_cnd.cn_flags = LOCKPARENT; 2070 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 2071 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2072 if (dirp) { 2073 if (v3) 2074 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 2075 procp); 2076 else { 2077 vrele(dirp); 2078 dirp = (struct vnode *)0; 2079 } 2080 } 2081 if (error) 2082 goto out; 2083 VATTR_NULL(&va); 2084 if (v3) { 2085 nfsm_srvsattr(&va); 2086 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 2087 len2 = fxdr_unsigned(uint32_t, *tl); 2088 if (len2 > PATH_MAX) { 2089 /* XXX should check _PC_NO_TRUNC */ 2090 error = ENAMETOOLONG; 2091 goto abortop; 2092 } 2093 } 2094 else { 2095 /* NFSv2 */ 2096 nfsm_strsiz(len2, NFS_MAXPATHLEN); 2097 } 2098 pathcp = malloc(len2 + 1, M_TEMP, M_WAITOK); 2099 iv.iov_base = pathcp; 2100 iv.iov_len = len2; 2101 io.uio_resid = len2; 2102 io.uio_offset = 0; 2103 io.uio_iov = &iv; 2104 io.uio_iovcnt = 1; 2105 io.uio_segflg = UIO_SYSSPACE; 2106 io.uio_rw = UIO_READ; 2107 io.uio_procp = (struct proc *)0; 2108 nfsm_mtouio(&io, len2); 2109 if (!v3) { 2110 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2111 va.va_mode = fxdr_unsigned(u_int16_t, sp->sa_mode); 2112 } 2113 *(pathcp + len2) = '\0'; 2114 if (nd.ni_vp) { 2115 error = EEXIST; 2116 abortop: 2117 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2118 if (nd.ni_dvp == nd.ni_vp) 2119 vrele(nd.ni_dvp); 2120 else 2121 vput(nd.ni_dvp); 2122 if (nd.ni_vp) 2123 vrele(nd.ni_vp); 2124 goto out; 2125 } 2126 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2127 error = VOP_SYMLINK(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va, pathcp); 2128 if (!error) { 2129 if (v3) { 2130 memset((caddr_t)fhp, 0, sizeof(nfh)); 2131 fhp->fh_fsid = nd.ni_vp->v_mount->mnt_stat.f_fsid; 2132 error = VFS_VPTOFH(nd.ni_vp, &fhp->fh_fid); 2133 if (!error) 2134 error = VOP_GETATTR(nd.ni_vp, &va, cred, 2135 procp); 2136 vput(nd.ni_vp); 2137 } else { 2138 vput(nd.ni_vp); 2139 } 2140 } 2141 out: 2142 if (pathcp) 2143 free(pathcp, M_TEMP); 2144 if (dirp) { 2145 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 2146 vrele(dirp); 2147 } 2148 nfsm_reply(NFSX_SRVFH(v3) + NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2149 if (v3) { 2150 if (!error) { 2151 nfsm_srvpostop_fh(fhp); 2152 nfsm_srvpostop_attr(0, &va); 2153 } 2154 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2155 } 2156 return (0); 2157 nfsmout: 2158 if (dirp) 2159 vrele(dirp); 2160 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2161 if (nd.ni_dvp == nd.ni_vp) 2162 vrele(nd.ni_dvp); 2163 else 2164 vput(nd.ni_dvp); 2165 if (nd.ni_vp) 2166 vrele(nd.ni_vp); 2167 if (pathcp) 2168 free(pathcp, M_TEMP); 2169 return (error); 2170 } 2171 2172 /* 2173 * nfs mkdir service 2174 */ 2175 int 2176 nfsrv_mkdir(nfsd, slp, procp, mrq) 2177 struct nfsrv_descript *nfsd; 2178 struct nfssvc_sock *slp; 2179 struct proc *procp; 2180 struct mbuf **mrq; 2181 { 2182 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2183 struct mbuf *nam = nfsd->nd_nam; 2184 caddr_t dpos = nfsd->nd_dpos; 2185 struct ucred *cred = &nfsd->nd_cr; 2186 struct vattr va, dirfor, diraft; 2187 struct nfs_fattr *fp; 2188 struct nameidata nd; 2189 caddr_t cp; 2190 u_int32_t *tl; 2191 int32_t t1; 2192 caddr_t bpos; 2193 int error = 0, cache, len, dirfor_ret = 1, diraft_ret = 1; 2194 int v3 = (nfsd->nd_flag & ND_NFSV3); 2195 char *cp2; 2196 struct mbuf *mb, *mreq; 2197 struct vnode *vp, *dirp = (struct vnode *)0; 2198 nfsfh_t nfh; 2199 fhandle_t *fhp; 2200 u_quad_t frev; 2201 2202 fhp = &nfh.fh_generic; 2203 nfsm_srvmtofh(fhp); 2204 nfsm_srvnamesiz(len); 2205 nd.ni_cnd.cn_cred = cred; 2206 nd.ni_cnd.cn_nameiop = CREATE; 2207 nd.ni_cnd.cn_flags = LOCKPARENT; 2208 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 2209 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2210 if (dirp) { 2211 if (v3) 2212 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 2213 procp); 2214 else { 2215 vrele(dirp); 2216 dirp = (struct vnode *)0; 2217 } 2218 } 2219 if (error) { 2220 nfsm_reply(NFSX_WCCDATA(v3)); 2221 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2222 if (dirp) 2223 vrele(dirp); 2224 return (0); 2225 } 2226 VATTR_NULL(&va); 2227 if (v3) { 2228 nfsm_srvsattr(&va); 2229 } else { 2230 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2231 va.va_mode = nfstov_mode(*tl++); 2232 } 2233 va.va_type = VDIR; 2234 vp = nd.ni_vp; 2235 if (vp != NULL) { 2236 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2237 if (nd.ni_dvp == vp) 2238 vrele(nd.ni_dvp); 2239 else 2240 vput(nd.ni_dvp); 2241 vrele(vp); 2242 error = EEXIST; 2243 goto out; 2244 } 2245 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2246 error = VOP_MKDIR(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 2247 if (!error) { 2248 vp = nd.ni_vp; 2249 memset((caddr_t)fhp, 0, sizeof(nfh)); 2250 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; 2251 error = VFS_VPTOFH(vp, &fhp->fh_fid); 2252 if (!error) 2253 error = VOP_GETATTR(vp, &va, cred, procp); 2254 vput(vp); 2255 } 2256 out: 2257 if (dirp) { 2258 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 2259 vrele(dirp); 2260 } 2261 nfsm_reply(NFSX_SRVFH(v3) + NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2262 if (v3) { 2263 if (!error) { 2264 nfsm_srvpostop_fh(fhp); 2265 nfsm_srvpostop_attr(0, &va); 2266 } 2267 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2268 } else { 2269 nfsm_srvfhtom(fhp, v3); 2270 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 2271 nfsm_srvfillattr(&va, fp); 2272 } 2273 return (0); 2274 nfsmout: 2275 if (dirp) 2276 vrele(dirp); 2277 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2278 if (nd.ni_dvp == nd.ni_vp) 2279 vrele(nd.ni_dvp); 2280 else 2281 vput(nd.ni_dvp); 2282 if (nd.ni_vp) 2283 vrele(nd.ni_vp); 2284 return (error); 2285 } 2286 2287 /* 2288 * nfs rmdir service 2289 */ 2290 int 2291 nfsrv_rmdir(nfsd, slp, procp, mrq) 2292 struct nfsrv_descript *nfsd; 2293 struct nfssvc_sock *slp; 2294 struct proc *procp; 2295 struct mbuf **mrq; 2296 { 2297 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2298 struct mbuf *nam = nfsd->nd_nam; 2299 caddr_t dpos = nfsd->nd_dpos; 2300 struct ucred *cred = &nfsd->nd_cr; 2301 u_int32_t *tl; 2302 int32_t t1; 2303 caddr_t bpos; 2304 int error = 0, cache, len, dirfor_ret = 1, diraft_ret = 1; 2305 int v3 = (nfsd->nd_flag & ND_NFSV3); 2306 char *cp2; 2307 struct mbuf *mb, *mreq; 2308 struct vnode *vp, *dirp = (struct vnode *)0; 2309 struct vattr dirfor, diraft; 2310 nfsfh_t nfh; 2311 fhandle_t *fhp; 2312 struct nameidata nd; 2313 u_quad_t frev; 2314 2315 fhp = &nfh.fh_generic; 2316 nfsm_srvmtofh(fhp); 2317 nfsm_srvnamesiz(len); 2318 nd.ni_cnd.cn_cred = cred; 2319 nd.ni_cnd.cn_nameiop = DELETE; 2320 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 2321 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 2322 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2323 if (dirp) { 2324 if (v3) 2325 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 2326 procp); 2327 else { 2328 vrele(dirp); 2329 dirp = (struct vnode *)0; 2330 } 2331 } 2332 if (error) { 2333 nfsm_reply(NFSX_WCCDATA(v3)); 2334 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2335 if (dirp) 2336 vrele(dirp); 2337 return (0); 2338 } 2339 vp = nd.ni_vp; 2340 if (vp->v_type != VDIR) { 2341 error = ENOTDIR; 2342 goto out; 2343 } 2344 /* 2345 * No rmdir "." please. 2346 */ 2347 if (nd.ni_dvp == vp) { 2348 error = EINVAL; 2349 goto out; 2350 } 2351 /* 2352 * The root of a mounted filesystem cannot be deleted. 2353 */ 2354 if (vp->v_flag & VROOT) 2355 error = EBUSY; 2356 out: 2357 if (!error) { 2358 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2359 nqsrv_getl(vp, ND_WRITE); 2360 error = VOP_RMDIR(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); 2361 } else { 2362 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2363 if (nd.ni_dvp == nd.ni_vp) 2364 vrele(nd.ni_dvp); 2365 else 2366 vput(nd.ni_dvp); 2367 vput(vp); 2368 } 2369 if (dirp) { 2370 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 2371 vrele(dirp); 2372 } 2373 nfsm_reply(NFSX_WCCDATA(v3)); 2374 if (v3) { 2375 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2376 return (0); 2377 } 2378 nfsm_srvdone; 2379 } 2380 2381 /* 2382 * nfs readdir service 2383 * - mallocs what it thinks is enough to read 2384 * count rounded up to a multiple of NFS_DIRBLKSIZ <= NFS_MAXREADDIR 2385 * - calls VOP_READDIR() 2386 * - loops around building the reply 2387 * if the output generated exceeds count break out of loop 2388 * The nfsm_clget macro is used here so that the reply will be packed 2389 * tightly in mbuf clusters. 2390 * - it only knows that it has encountered eof when the VOP_READDIR() 2391 * reads nothing 2392 * - as such one readdir rpc will return eof false although you are there 2393 * and then the next will return eof 2394 * - it trims out records with d_fileno == 0 2395 * this doesn't matter for Unix clients, but they might confuse clients 2396 * for other os'. 2397 * - it trims out records with d_type == DT_WHT 2398 * these cannot be seen through NFS (unless we extend the protocol) 2399 * NB: It is tempting to set eof to true if the VOP_READDIR() reads less 2400 * than requested, but this may not apply to all filesystems. For 2401 * example, client NFS does not { although it is never remote mounted 2402 * anyhow } 2403 * The alternate call nfsrv_readdirplus() does lookups as well. 2404 * PS: The NFS protocol spec. does not clarify what the "count" byte 2405 * argument is a count of.. just name strings and file id's or the 2406 * entire reply rpc or ... 2407 * I tried just file name and id sizes and it confused the Sun client, 2408 * so I am using the full rpc size now. The "paranoia.." comment refers 2409 * to including the status longwords that are not a part of the dir. 2410 * "entry" structures, but are in the rpc. 2411 */ 2412 struct flrep { 2413 nfsuint64 fl_off; 2414 u_int32_t fl_postopok; 2415 u_int32_t fl_fattr[NFSX_V3FATTR / sizeof (u_int32_t)]; 2416 u_int32_t fl_fhok; 2417 u_int32_t fl_fhsize; 2418 u_int32_t fl_nfh[NFSX_V3FH / sizeof (u_int32_t)]; 2419 }; 2420 2421 int 2422 nfsrv_readdir(nfsd, slp, procp, mrq) 2423 struct nfsrv_descript *nfsd; 2424 struct nfssvc_sock *slp; 2425 struct proc *procp; 2426 struct mbuf **mrq; 2427 { 2428 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2429 struct mbuf *nam = nfsd->nd_nam; 2430 caddr_t dpos = nfsd->nd_dpos; 2431 struct ucred *cred = &nfsd->nd_cr; 2432 char *bp, *be; 2433 struct mbuf *mp; 2434 struct dirent *dp; 2435 caddr_t cp; 2436 u_int32_t *tl; 2437 int32_t t1; 2438 caddr_t bpos; 2439 struct mbuf *mb, *mreq, *mp2; 2440 char *cpos, *cend, *cp2, *rbuf; 2441 struct vnode *vp; 2442 struct vattr at; 2443 nfsfh_t nfh; 2444 fhandle_t *fhp; 2445 struct uio io; 2446 struct iovec iv; 2447 int len, nlen, rem, xfer, tsiz, i, error = 0, getret = 1; 2448 int siz, cnt, fullsiz, eofflag, rdonly, cache, ncookies; 2449 int v3 = (nfsd->nd_flag & ND_NFSV3); 2450 u_quad_t frev, off, toff, verf; 2451 off_t *cookies = NULL, *cookiep; 2452 nfsuint64 jar; 2453 2454 fhp = &nfh.fh_generic; 2455 nfsm_srvmtofh(fhp); 2456 if (v3) { 2457 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 2458 toff = fxdr_hyper(tl); 2459 tl += 2; 2460 verf = fxdr_hyper(tl); 2461 tl += 2; 2462 } else { 2463 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2464 toff = fxdr_unsigned(u_quad_t, *tl++); 2465 } 2466 off = toff; 2467 cnt = fxdr_unsigned(int, *tl); 2468 siz = ((cnt + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1)); 2469 xfer = NFS_SRVMAXDATA(nfsd); 2470 if (siz > xfer) 2471 siz = xfer; 2472 fullsiz = siz; 2473 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 2474 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2475 if (!error && vp->v_type != VDIR) { 2476 error = ENOTDIR; 2477 vput(vp); 2478 } 2479 if (error) { 2480 nfsm_reply(NFSX_UNSIGNED); 2481 nfsm_srvpostop_attr(getret, &at); 2482 return (0); 2483 } 2484 nqsrv_getl(vp, ND_READ); 2485 if (v3) { 2486 error = getret = VOP_GETATTR(vp, &at, cred, procp); 2487 #ifdef NFS3_STRICTVERF 2488 /* 2489 * XXX This check is too strict for Solaris 2.5 clients. 2490 */ 2491 if (!error && toff && verf != at.va_filerev) 2492 error = NFSERR_BAD_COOKIE; 2493 #endif 2494 } 2495 if (!error) 2496 error = nfsrv_access(vp, VEXEC, cred, rdonly, procp, 0); 2497 if (error) { 2498 vput(vp); 2499 nfsm_reply(NFSX_POSTOPATTR(v3)); 2500 nfsm_srvpostop_attr(getret, &at); 2501 return (0); 2502 } 2503 VOP_UNLOCK(vp, 0); 2504 rbuf = malloc(siz, M_TEMP, M_WAITOK); 2505 again: 2506 iv.iov_base = rbuf; 2507 iv.iov_len = fullsiz; 2508 io.uio_iov = &iv; 2509 io.uio_iovcnt = 1; 2510 io.uio_offset = (off_t)off; 2511 io.uio_resid = fullsiz; 2512 io.uio_segflg = UIO_SYSSPACE; 2513 io.uio_rw = UIO_READ; 2514 io.uio_procp = (struct proc *)0; 2515 eofflag = 0; 2516 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2517 2518 error = VOP_READDIR(vp, &io, cred, &eofflag, &cookies, &ncookies); 2519 2520 off = (off_t)io.uio_offset; 2521 if (!cookies && !error) 2522 error = NFSERR_PERM; 2523 if (v3) { 2524 getret = VOP_GETATTR(vp, &at, cred, procp); 2525 if (!error) 2526 error = getret; 2527 } 2528 2529 VOP_UNLOCK(vp, 0); 2530 if (error) { 2531 vrele(vp); 2532 free((caddr_t)rbuf, M_TEMP); 2533 if (cookies) 2534 free((caddr_t)cookies, M_TEMP); 2535 nfsm_reply(NFSX_POSTOPATTR(v3)); 2536 nfsm_srvpostop_attr(getret, &at); 2537 return (0); 2538 } 2539 if (io.uio_resid) { 2540 siz -= io.uio_resid; 2541 2542 /* 2543 * If nothing read, return eof 2544 * rpc reply 2545 */ 2546 if (siz == 0) { 2547 vrele(vp); 2548 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_COOKIEVERF(v3) + 2549 2 * NFSX_UNSIGNED); 2550 if (v3) { 2551 nfsm_srvpostop_attr(getret, &at); 2552 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 2553 txdr_hyper(at.va_filerev, tl); 2554 tl += 2; 2555 } else 2556 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2557 *tl++ = nfs_false; 2558 *tl = nfs_true; 2559 free((caddr_t)rbuf, M_TEMP); 2560 free((caddr_t)cookies, M_TEMP); 2561 return (0); 2562 } 2563 } 2564 2565 /* 2566 * Check for degenerate cases of nothing useful read. 2567 * If so go try again 2568 */ 2569 cpos = rbuf; 2570 cend = rbuf + siz; 2571 dp = (struct dirent *)cpos; 2572 cookiep = cookies; 2573 2574 while (cpos < cend && ncookies > 0 && 2575 (dp->d_fileno == 0 || dp->d_type == DT_WHT)) { 2576 cpos += dp->d_reclen; 2577 dp = (struct dirent *)cpos; 2578 cookiep++; 2579 ncookies--; 2580 } 2581 if (cpos >= cend || ncookies == 0) { 2582 toff = off; 2583 siz = fullsiz; 2584 goto again; 2585 } 2586 2587 len = 3 * NFSX_UNSIGNED; /* paranoia, probably can be 0 */ 2588 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_COOKIEVERF(v3) + siz); 2589 if (v3) { 2590 nfsm_srvpostop_attr(getret, &at); 2591 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2592 txdr_hyper(at.va_filerev, tl); 2593 } 2594 mp = mp2 = mb; 2595 bp = bpos; 2596 be = bp + M_TRAILINGSPACE(mp); 2597 2598 /* Loop through the records and build reply */ 2599 while (cpos < cend && ncookies > 0) { 2600 if (dp->d_fileno != 0 && dp->d_type != DT_WHT) { 2601 nlen = dp->d_namlen; 2602 rem = nfsm_rndup(nlen)-nlen; 2603 len += (4 * NFSX_UNSIGNED + nlen + rem); 2604 if (v3) 2605 len += 2 * NFSX_UNSIGNED; 2606 if (len > cnt) { 2607 eofflag = 0; 2608 break; 2609 } 2610 /* 2611 * Build the directory record xdr from 2612 * the dirent entry. 2613 */ 2614 nfsm_clget; 2615 *tl = nfs_true; 2616 bp += NFSX_UNSIGNED; 2617 if (v3) { 2618 nfsm_clget; 2619 *tl = 0; 2620 bp += NFSX_UNSIGNED; 2621 } 2622 nfsm_clget; 2623 *tl = txdr_unsigned(dp->d_fileno); 2624 bp += NFSX_UNSIGNED; 2625 nfsm_clget; 2626 *tl = txdr_unsigned(nlen); 2627 bp += NFSX_UNSIGNED; 2628 2629 /* And loop around copying the name */ 2630 xfer = nlen; 2631 cp = dp->d_name; 2632 while (xfer > 0) { 2633 nfsm_clget; 2634 if ((bp+xfer) > be) 2635 tsiz = be-bp; 2636 else 2637 tsiz = xfer; 2638 memcpy(bp, cp, tsiz); 2639 bp += tsiz; 2640 xfer -= tsiz; 2641 if (xfer > 0) 2642 cp += tsiz; 2643 } 2644 /* And null pad to an int32_t boundary */ 2645 for (i = 0; i < rem; i++) 2646 *bp++ = '\0'; 2647 nfsm_clget; 2648 2649 /* Finish off the record */ 2650 txdr_hyper(*cookiep, &jar); 2651 if (v3) { 2652 *tl = jar.nfsuquad[0]; 2653 bp += NFSX_UNSIGNED; 2654 nfsm_clget; 2655 } 2656 *tl = jar.nfsuquad[1]; 2657 bp += NFSX_UNSIGNED; 2658 } 2659 cpos += dp->d_reclen; 2660 dp = (struct dirent *)cpos; 2661 cookiep++; 2662 ncookies--; 2663 } 2664 vrele(vp); 2665 nfsm_clget; 2666 *tl = nfs_false; 2667 bp += NFSX_UNSIGNED; 2668 nfsm_clget; 2669 if (eofflag) 2670 *tl = nfs_true; 2671 else 2672 *tl = nfs_false; 2673 bp += NFSX_UNSIGNED; 2674 if (mp != mb) { 2675 if (bp < be) 2676 mp->m_len = bp - mtod(mp, caddr_t); 2677 } else 2678 mp->m_len += bp - bpos; 2679 free((caddr_t)rbuf, M_TEMP); 2680 free((caddr_t)cookies, M_TEMP); 2681 nfsm_srvdone; 2682 } 2683 2684 int 2685 nfsrv_readdirplus(nfsd, slp, procp, mrq) 2686 struct nfsrv_descript *nfsd; 2687 struct nfssvc_sock *slp; 2688 struct proc *procp; 2689 struct mbuf **mrq; 2690 { 2691 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2692 struct mbuf *nam = nfsd->nd_nam; 2693 caddr_t dpos = nfsd->nd_dpos; 2694 struct ucred *cred = &nfsd->nd_cr; 2695 char *bp, *be; 2696 struct mbuf *mp; 2697 struct dirent *dp; 2698 caddr_t cp; 2699 u_int32_t *tl; 2700 int32_t t1; 2701 caddr_t bpos; 2702 struct mbuf *mb, *mreq, *mp2; 2703 char *cpos, *cend, *cp2, *rbuf; 2704 struct vnode *vp, *nvp; 2705 struct flrep fl; 2706 nfsfh_t nfh; 2707 fhandle_t *fhp, *nfhp = (fhandle_t *)fl.fl_nfh; 2708 struct uio io; 2709 struct iovec iv; 2710 struct vattr va, at, *vap = &va; 2711 struct nfs_fattr *fp; 2712 int len, nlen, rem, xfer, tsiz, i, error = 0, getret = 1; 2713 int siz, cnt, fullsiz, eofflag, rdonly, cache, dirlen, ncookies; 2714 u_quad_t frev, off, toff, verf; 2715 off_t *cookies = NULL, *cookiep; 2716 2717 fhp = &nfh.fh_generic; 2718 nfsm_srvmtofh(fhp); 2719 nfsm_dissect(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 2720 toff = fxdr_hyper(tl); 2721 tl += 2; 2722 verf = fxdr_hyper(tl); 2723 tl += 2; 2724 siz = fxdr_unsigned(int, *tl++); 2725 cnt = fxdr_unsigned(int, *tl); 2726 off = toff; 2727 siz = ((siz + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1)); 2728 xfer = NFS_SRVMAXDATA(nfsd); 2729 if (siz > xfer) 2730 siz = xfer; 2731 fullsiz = siz; 2732 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 2733 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2734 if (!error && vp->v_type != VDIR) { 2735 error = ENOTDIR; 2736 vput(vp); 2737 } 2738 if (error) { 2739 nfsm_reply(NFSX_UNSIGNED); 2740 nfsm_srvpostop_attr(getret, &at); 2741 return (0); 2742 } 2743 error = getret = VOP_GETATTR(vp, &at, cred, procp); 2744 #ifdef NFS3_STRICTVERF 2745 /* 2746 * XXX This check is too strict for Solaris 2.5 clients. 2747 */ 2748 if (!error && toff && verf != at.va_filerev) 2749 error = NFSERR_BAD_COOKIE; 2750 #endif 2751 if (!error) { 2752 nqsrv_getl(vp, ND_READ); 2753 error = nfsrv_access(vp, VEXEC, cred, rdonly, procp, 0); 2754 } 2755 if (error) { 2756 vput(vp); 2757 nfsm_reply(NFSX_V3POSTOPATTR); 2758 nfsm_srvpostop_attr(getret, &at); 2759 return (0); 2760 } 2761 VOP_UNLOCK(vp, 0); 2762 2763 rbuf = malloc(siz, M_TEMP, M_WAITOK); 2764 again: 2765 iv.iov_base = rbuf; 2766 iv.iov_len = fullsiz; 2767 io.uio_iov = &iv; 2768 io.uio_iovcnt = 1; 2769 io.uio_offset = (off_t)off; 2770 io.uio_resid = fullsiz; 2771 io.uio_segflg = UIO_SYSSPACE; 2772 io.uio_rw = UIO_READ; 2773 io.uio_procp = (struct proc *)0; 2774 eofflag = 0; 2775 2776 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2777 2778 error = VOP_READDIR(vp, &io, cred, &eofflag, &cookies, &ncookies); 2779 2780 off = (u_quad_t)io.uio_offset; 2781 getret = VOP_GETATTR(vp, &at, cred, procp); 2782 2783 VOP_UNLOCK(vp, 0); 2784 2785 /* 2786 * If the VGET operation doesn't work for this filesystem, 2787 * we can't support readdirplus. Returning NOTSUPP should 2788 * make clients fall back to plain readdir. 2789 * There's no need to check for VPTOFH as well, we wouldn't 2790 * even be here otherwise. 2791 */ 2792 if (!getret) { 2793 if ((getret = VFS_VGET(vp->v_mount, at.va_fileid, &nvp))) 2794 getret = (getret == EOPNOTSUPP) ? 2795 NFSERR_NOTSUPP : NFSERR_IO; 2796 else 2797 vput(nvp); 2798 } 2799 2800 if (!cookies && !error) 2801 error = NFSERR_PERM; 2802 if (!error) 2803 error = getret; 2804 if (error) { 2805 vrele(vp); 2806 if (cookies) 2807 free((caddr_t)cookies, M_TEMP); 2808 free((caddr_t)rbuf, M_TEMP); 2809 nfsm_reply(NFSX_V3POSTOPATTR); 2810 nfsm_srvpostop_attr(getret, &at); 2811 return (0); 2812 } 2813 if (io.uio_resid) { 2814 siz -= io.uio_resid; 2815 2816 /* 2817 * If nothing read, return eof 2818 * rpc reply 2819 */ 2820 if (siz == 0) { 2821 vrele(vp); 2822 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF + 2823 2 * NFSX_UNSIGNED); 2824 nfsm_srvpostop_attr(getret, &at); 2825 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 2826 txdr_hyper(at.va_filerev, tl); 2827 tl += 2; 2828 *tl++ = nfs_false; 2829 *tl = nfs_true; 2830 free((caddr_t)cookies, M_TEMP); 2831 free((caddr_t)rbuf, M_TEMP); 2832 return (0); 2833 } 2834 } 2835 2836 /* 2837 * Check for degenerate cases of nothing useful read. 2838 * If so go try again 2839 */ 2840 cpos = rbuf; 2841 cend = rbuf + siz; 2842 dp = (struct dirent *)cpos; 2843 cookiep = cookies; 2844 2845 while (cpos < cend && ncookies > 0 && 2846 (dp->d_fileno == 0 || dp->d_type == DT_WHT)) { 2847 cpos += dp->d_reclen; 2848 dp = (struct dirent *)cpos; 2849 cookiep++; 2850 ncookies--; 2851 } 2852 if (cpos >= cend || ncookies == 0) { 2853 toff = off; 2854 siz = fullsiz; 2855 goto again; 2856 } 2857 2858 dirlen = len = NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF + 2 * NFSX_UNSIGNED; 2859 nfsm_reply(cnt); 2860 nfsm_srvpostop_attr(getret, &at); 2861 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2862 txdr_hyper(at.va_filerev, tl); 2863 mp = mp2 = mb; 2864 bp = bpos; 2865 be = bp + M_TRAILINGSPACE(mp); 2866 2867 /* Loop through the records and build reply */ 2868 while (cpos < cend && ncookies > 0) { 2869 if (dp->d_fileno != 0 && dp->d_type != DT_WHT) { 2870 nlen = dp->d_namlen; 2871 rem = nfsm_rndup(nlen)-nlen; 2872 2873 /* 2874 * For readdir_and_lookup get the vnode using 2875 * the file number. 2876 */ 2877 if (VFS_VGET(vp->v_mount, dp->d_fileno, &nvp)) 2878 goto invalid; 2879 memset((caddr_t)nfhp, 0, NFSX_V3FH); 2880 nfhp->fh_fsid = 2881 nvp->v_mount->mnt_stat.f_fsid; 2882 if (VFS_VPTOFH(nvp, &nfhp->fh_fid)) { 2883 vput(nvp); 2884 goto invalid; 2885 } 2886 if (VOP_GETATTR(nvp, vap, cred, procp)) { 2887 vput(nvp); 2888 goto invalid; 2889 } 2890 vput(nvp); 2891 2892 /* 2893 * If either the dircount or maxcount will be 2894 * exceeded, get out now. Both of these lengths 2895 * are calculated conservatively, including all 2896 * XDR overheads. 2897 */ 2898 len += (8 * NFSX_UNSIGNED + nlen + rem + NFSX_V3FH + 2899 NFSX_V3POSTOPATTR); 2900 dirlen += (6 * NFSX_UNSIGNED + nlen + rem); 2901 if (len > cnt || dirlen > fullsiz) { 2902 eofflag = 0; 2903 break; 2904 } 2905 2906 /* 2907 * Build the directory record xdr from 2908 * the dirent entry. 2909 */ 2910 fp = (struct nfs_fattr *)&fl.fl_fattr; 2911 nfsm_srvfillattr(vap, fp); 2912 fl.fl_fhsize = txdr_unsigned(NFSX_V3FH); 2913 fl.fl_fhok = nfs_true; 2914 fl.fl_postopok = nfs_true; 2915 txdr_hyper(*cookiep, fl.fl_off.nfsuquad); 2916 2917 nfsm_clget; 2918 *tl = nfs_true; 2919 bp += NFSX_UNSIGNED; 2920 nfsm_clget; 2921 *tl = 0; 2922 bp += NFSX_UNSIGNED; 2923 nfsm_clget; 2924 *tl = txdr_unsigned(dp->d_fileno); 2925 bp += NFSX_UNSIGNED; 2926 nfsm_clget; 2927 *tl = txdr_unsigned(nlen); 2928 bp += NFSX_UNSIGNED; 2929 2930 /* And loop around copying the name */ 2931 xfer = nlen; 2932 cp = dp->d_name; 2933 while (xfer > 0) { 2934 nfsm_clget; 2935 if ((bp + xfer) > be) 2936 tsiz = be - bp; 2937 else 2938 tsiz = xfer; 2939 memcpy(bp, cp, tsiz); 2940 bp += tsiz; 2941 xfer -= tsiz; 2942 if (xfer > 0) 2943 cp += tsiz; 2944 } 2945 /* And null pad to an int32_t boundary */ 2946 for (i = 0; i < rem; i++) 2947 *bp++ = '\0'; 2948 2949 /* 2950 * Now copy the flrep structure out. 2951 */ 2952 xfer = sizeof (struct flrep); 2953 cp = (caddr_t)&fl; 2954 while (xfer > 0) { 2955 nfsm_clget; 2956 if ((bp + xfer) > be) 2957 tsiz = be - bp; 2958 else 2959 tsiz = xfer; 2960 memcpy(bp, cp, tsiz); 2961 bp += tsiz; 2962 xfer -= tsiz; 2963 if (xfer > 0) 2964 cp += tsiz; 2965 } 2966 } 2967 invalid: 2968 cpos += dp->d_reclen; 2969 dp = (struct dirent *)cpos; 2970 cookiep++; 2971 ncookies--; 2972 } 2973 vrele(vp); 2974 nfsm_clget; 2975 *tl = nfs_false; 2976 bp += NFSX_UNSIGNED; 2977 nfsm_clget; 2978 if (eofflag) 2979 *tl = nfs_true; 2980 else 2981 *tl = nfs_false; 2982 bp += NFSX_UNSIGNED; 2983 if (mp != mb) { 2984 if (bp < be) 2985 mp->m_len = bp - mtod(mp, caddr_t); 2986 } else 2987 mp->m_len += bp - bpos; 2988 free((caddr_t)cookies, M_TEMP); 2989 free((caddr_t)rbuf, M_TEMP); 2990 nfsm_srvdone; 2991 } 2992 2993 /* 2994 * nfs commit service 2995 */ 2996 int 2997 nfsrv_commit(nfsd, slp, procp, mrq) 2998 struct nfsrv_descript *nfsd; 2999 struct nfssvc_sock *slp; 3000 struct proc *procp; 3001 struct mbuf **mrq; 3002 { 3003 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3004 struct mbuf *nam = nfsd->nd_nam; 3005 caddr_t dpos = nfsd->nd_dpos; 3006 struct ucred *cred = &nfsd->nd_cr; 3007 struct vattr bfor, aft; 3008 struct vnode *vp; 3009 nfsfh_t nfh; 3010 fhandle_t *fhp; 3011 u_int32_t *tl; 3012 int32_t t1; 3013 caddr_t bpos; 3014 int error = 0, rdonly, for_ret = 1, aft_ret = 1, cnt, cache; 3015 char *cp2; 3016 struct mbuf *mb, *mreq; 3017 u_quad_t frev, off, end; 3018 3019 #ifndef nolint 3020 cache = 0; 3021 #endif 3022 fhp = &nfh.fh_generic; 3023 nfsm_srvmtofh(fhp); 3024 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 3025 3026 off = fxdr_hyper(tl); 3027 tl += 2; 3028 cnt = fxdr_unsigned(int, *tl); 3029 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 3030 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 3031 if (error) { 3032 nfsm_reply(2 * NFSX_UNSIGNED); 3033 nfsm_srvwcc_data(for_ret, &bfor, aft_ret, &aft); 3034 return (0); 3035 } 3036 for_ret = VOP_GETATTR(vp, &bfor, cred, procp); 3037 end = (cnt > 0) ? off + cnt : vp->v_size; 3038 if (end < off || end > vp->v_size) 3039 end = vp->v_size; 3040 error = VOP_FSYNC(vp, cred, FSYNC_WAIT, off, end, procp); 3041 aft_ret = VOP_GETATTR(vp, &aft, cred, procp); 3042 vput(vp); 3043 nfsm_reply(NFSX_V3WCCDATA + NFSX_V3WRITEVERF); 3044 nfsm_srvwcc_data(for_ret, &bfor, aft_ret, &aft); 3045 if (!error) { 3046 nfsm_build(tl, u_int32_t *, NFSX_V3WRITEVERF); 3047 *tl++ = txdr_unsigned(boottime.tv_sec); 3048 *tl = txdr_unsigned(boottime.tv_usec); 3049 } else 3050 return (0); 3051 nfsm_srvdone; 3052 } 3053 3054 /* 3055 * nfs statfs service 3056 */ 3057 int 3058 nfsrv_statfs(nfsd, slp, procp, mrq) 3059 struct nfsrv_descript *nfsd; 3060 struct nfssvc_sock *slp; 3061 struct proc *procp; 3062 struct mbuf **mrq; 3063 { 3064 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3065 struct mbuf *nam = nfsd->nd_nam; 3066 caddr_t dpos = nfsd->nd_dpos; 3067 struct ucred *cred = &nfsd->nd_cr; 3068 struct statfs *sf; 3069 struct nfs_statfs *sfp; 3070 u_int32_t *tl; 3071 int32_t t1; 3072 caddr_t bpos; 3073 int error = 0, rdonly, cache, getret = 1; 3074 int v3 = (nfsd->nd_flag & ND_NFSV3); 3075 char *cp2; 3076 struct mbuf *mb, *mreq; 3077 struct vnode *vp; 3078 struct vattr at; 3079 nfsfh_t nfh; 3080 fhandle_t *fhp; 3081 struct statfs statfs; 3082 u_quad_t frev, tval; 3083 3084 #ifndef nolint 3085 cache = 0; 3086 #endif 3087 fhp = &nfh.fh_generic; 3088 nfsm_srvmtofh(fhp); 3089 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 3090 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 3091 if (error) { 3092 nfsm_reply(NFSX_UNSIGNED); 3093 nfsm_srvpostop_attr(getret, &at); 3094 return (0); 3095 } 3096 sf = &statfs; 3097 error = VFS_STATFS(vp->v_mount, sf, procp); 3098 getret = VOP_GETATTR(vp, &at, cred, procp); 3099 vput(vp); 3100 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_STATFS(v3)); 3101 if (v3) 3102 nfsm_srvpostop_attr(getret, &at); 3103 if (error) 3104 return (0); 3105 nfsm_build(sfp, struct nfs_statfs *, NFSX_STATFS(v3)); 3106 if (v3) { 3107 tval = (u_quad_t)((quad_t)sf->f_blocks * (quad_t)sf->f_bsize); 3108 txdr_hyper(tval, &sfp->sf_tbytes); 3109 tval = (u_quad_t)((quad_t)sf->f_bfree * (quad_t)sf->f_bsize); 3110 txdr_hyper(tval, &sfp->sf_fbytes); 3111 tval = (u_quad_t)((quad_t)sf->f_bavail * (quad_t)sf->f_bsize); 3112 txdr_hyper(tval, &sfp->sf_abytes); 3113 tval = (u_quad_t)sf->f_files; 3114 txdr_hyper(tval, &sfp->sf_tfiles); 3115 tval = (u_quad_t)sf->f_ffree; 3116 txdr_hyper(tval, &sfp->sf_ffiles); 3117 txdr_hyper(tval, &sfp->sf_afiles); 3118 sfp->sf_invarsec = 0; 3119 } else { 3120 sfp->sf_tsize = txdr_unsigned(NFS_MAXDGRAMDATA); 3121 sfp->sf_bsize = txdr_unsigned(sf->f_bsize); 3122 sfp->sf_blocks = txdr_unsigned(sf->f_blocks); 3123 sfp->sf_bfree = txdr_unsigned(sf->f_bfree); 3124 sfp->sf_bavail = txdr_unsigned(sf->f_bavail); 3125 } 3126 nfsm_srvdone; 3127 } 3128 3129 /* 3130 * nfs fsinfo service 3131 */ 3132 int 3133 nfsrv_fsinfo(nfsd, slp, procp, mrq) 3134 struct nfsrv_descript *nfsd; 3135 struct nfssvc_sock *slp; 3136 struct proc *procp; 3137 struct mbuf **mrq; 3138 { 3139 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3140 struct mbuf *nam = nfsd->nd_nam; 3141 caddr_t dpos = nfsd->nd_dpos; 3142 struct ucred *cred = &nfsd->nd_cr; 3143 u_int32_t *tl; 3144 struct nfsv3_fsinfo *sip; 3145 int32_t t1; 3146 caddr_t bpos; 3147 int error = 0, rdonly, cache, getret = 1; 3148 uint32_t maxdata; 3149 char *cp2; 3150 struct mbuf *mb, *mreq; 3151 struct vnode *vp; 3152 struct vattr at; 3153 nfsfh_t nfh; 3154 fhandle_t *fhp; 3155 u_quad_t frev, maxfsize; 3156 struct statfs sb; 3157 3158 #ifndef nolint 3159 cache = 0; 3160 #endif 3161 fhp = &nfh.fh_generic; 3162 nfsm_srvmtofh(fhp); 3163 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 3164 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 3165 if (error) { 3166 nfsm_reply(NFSX_UNSIGNED); 3167 nfsm_srvpostop_attr(getret, &at); 3168 return (0); 3169 } 3170 3171 /* XXX Try to make a guess on the max file size. */ 3172 VFS_STATFS(vp->v_mount, &sb, (struct proc *)0); 3173 maxfsize = (u_quad_t)0x80000000 * sb.f_bsize - 1; 3174 3175 getret = VOP_GETATTR(vp, &at, cred, procp); 3176 vput(vp); 3177 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3FSINFO); 3178 nfsm_srvpostop_attr(getret, &at); 3179 nfsm_build(sip, struct nfsv3_fsinfo *, NFSX_V3FSINFO); 3180 3181 /* 3182 * XXX 3183 * There should be file system VFS OP(s) to get this information. 3184 * For now, assume ufs. 3185 */ 3186 if (slp->ns_so->so_type == SOCK_DGRAM) 3187 maxdata = NFS_MAXDGRAMDATA; 3188 else 3189 maxdata = NFS_MAXDATA; 3190 sip->fs_rtmax = txdr_unsigned(maxdata); 3191 sip->fs_rtpref = txdr_unsigned(maxdata); 3192 sip->fs_rtmult = txdr_unsigned(NFS_FABLKSIZE); 3193 sip->fs_wtmax = txdr_unsigned(maxdata); 3194 sip->fs_wtpref = txdr_unsigned(maxdata); 3195 sip->fs_wtmult = txdr_unsigned(NFS_FABLKSIZE); 3196 sip->fs_dtpref = txdr_unsigned(maxdata); 3197 txdr_hyper(maxfsize, &sip->fs_maxfilesize); 3198 sip->fs_timedelta.nfsv3_sec = 0; 3199 sip->fs_timedelta.nfsv3_nsec = txdr_unsigned(1); 3200 sip->fs_properties = txdr_unsigned(NFSV3FSINFO_LINK | 3201 NFSV3FSINFO_SYMLINK | NFSV3FSINFO_HOMOGENEOUS | 3202 NFSV3FSINFO_CANSETTIME); 3203 nfsm_srvdone; 3204 } 3205 3206 /* 3207 * nfs pathconf service 3208 */ 3209 int 3210 nfsrv_pathconf(nfsd, slp, procp, mrq) 3211 struct nfsrv_descript *nfsd; 3212 struct nfssvc_sock *slp; 3213 struct proc *procp; 3214 struct mbuf **mrq; 3215 { 3216 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3217 struct mbuf *nam = nfsd->nd_nam; 3218 caddr_t dpos = nfsd->nd_dpos; 3219 struct ucred *cred = &nfsd->nd_cr; 3220 u_int32_t *tl; 3221 struct nfsv3_pathconf *pc; 3222 int32_t t1; 3223 caddr_t bpos; 3224 int error = 0, rdonly, cache, getret = 1; 3225 register_t linkmax, namemax, chownres, notrunc; 3226 char *cp2; 3227 struct mbuf *mb, *mreq; 3228 struct vnode *vp; 3229 struct vattr at; 3230 nfsfh_t nfh; 3231 fhandle_t *fhp; 3232 u_quad_t frev; 3233 3234 #ifndef nolint 3235 cache = 0; 3236 #endif 3237 fhp = &nfh.fh_generic; 3238 nfsm_srvmtofh(fhp); 3239 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 3240 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 3241 if (error) { 3242 nfsm_reply(NFSX_UNSIGNED); 3243 nfsm_srvpostop_attr(getret, &at); 3244 return (0); 3245 } 3246 error = VOP_PATHCONF(vp, _PC_LINK_MAX, &linkmax); 3247 if (!error) 3248 error = VOP_PATHCONF(vp, _PC_NAME_MAX, &namemax); 3249 if (!error) 3250 error = VOP_PATHCONF(vp, _PC_CHOWN_RESTRICTED, &chownres); 3251 if (!error) 3252 error = VOP_PATHCONF(vp, _PC_NO_TRUNC, ¬runc); 3253 getret = VOP_GETATTR(vp, &at, cred, procp); 3254 vput(vp); 3255 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3PATHCONF); 3256 nfsm_srvpostop_attr(getret, &at); 3257 if (error) 3258 return (0); 3259 nfsm_build(pc, struct nfsv3_pathconf *, NFSX_V3PATHCONF); 3260 3261 pc->pc_linkmax = txdr_unsigned(linkmax); 3262 pc->pc_namemax = txdr_unsigned(namemax); 3263 pc->pc_notrunc = txdr_unsigned(notrunc); 3264 pc->pc_chownrestricted = txdr_unsigned(chownres); 3265 3266 /* 3267 * These should probably be supported by VOP_PATHCONF(), but 3268 * until msdosfs is exportable (why would you want to?), the 3269 * Unix defaults should be ok. 3270 */ 3271 pc->pc_caseinsensitive = nfs_false; 3272 pc->pc_casepreserving = nfs_true; 3273 nfsm_srvdone; 3274 } 3275 3276 /* 3277 * Null operation, used by clients to ping server 3278 */ 3279 /* ARGSUSED */ 3280 int 3281 nfsrv_null(nfsd, slp, procp, mrq) 3282 struct nfsrv_descript *nfsd; 3283 struct nfssvc_sock *slp; 3284 struct proc *procp; 3285 struct mbuf **mrq; 3286 { 3287 struct mbuf *mrep = nfsd->nd_mrep; 3288 caddr_t bpos; 3289 int error = NFSERR_RETVOID, cache = 0; 3290 struct mbuf *mb, *mreq; 3291 u_quad_t frev; 3292 3293 nfsm_reply(0); 3294 return (0); 3295 } 3296 3297 /* 3298 * No operation, used for obsolete procedures 3299 */ 3300 /* ARGSUSED */ 3301 int 3302 nfsrv_noop(nfsd, slp, procp, mrq) 3303 struct nfsrv_descript *nfsd; 3304 struct nfssvc_sock *slp; 3305 struct proc *procp; 3306 struct mbuf **mrq; 3307 { 3308 struct mbuf *mrep = nfsd->nd_mrep; 3309 caddr_t bpos; 3310 int error, cache = 0; 3311 struct mbuf *mb, *mreq; 3312 u_quad_t frev; 3313 3314 if (nfsd->nd_repstat) 3315 error = nfsd->nd_repstat; 3316 else 3317 error = EPROCUNAVAIL; 3318 nfsm_reply(0); 3319 return (0); 3320 } 3321 3322 /* 3323 * Perform access checking for vnodes obtained from file handles that would 3324 * refer to files already opened by a Unix client. You cannot just use 3325 * vn_writechk() and VOP_ACCESS() for two reasons. 3326 * 1 - You must check for exported rdonly as well as MNT_RDONLY for the write case 3327 * 2 - The owner is to be given access irrespective of mode bits for some 3328 * operations, so that processes that chmod after opening a file don't 3329 * break. I don't like this because it opens a security hole, but since 3330 * the nfs server opens a security hole the size of a barn door anyhow, 3331 * what the heck. 3332 * 3333 * The exception to rule 2 is EPERM. If a file is IMMUTABLE, VOP_ACCESS() 3334 * will return EPERM instead of EACCESS. EPERM is always an error. 3335 */ 3336 int 3337 nfsrv_access(vp, flags, cred, rdonly, p, override) 3338 struct vnode *vp; 3339 int flags; 3340 struct ucred *cred; 3341 int rdonly; 3342 struct proc *p; 3343 { 3344 struct vattr vattr; 3345 int error; 3346 if (flags & VWRITE) { 3347 /* Just vn_writechk() changed to check rdonly */ 3348 /* 3349 * Disallow write attempts on read-only file systems; 3350 * unless the file is a socket or a block or character 3351 * device resident on the file system. 3352 */ 3353 if (rdonly || (vp->v_mount->mnt_flag & MNT_RDONLY)) { 3354 switch (vp->v_type) { 3355 case VREG: 3356 case VDIR: 3357 case VLNK: 3358 return (EROFS); 3359 default: 3360 break; 3361 } 3362 } 3363 3364 /* 3365 * If the vnode is in use as a process's text, 3366 * we can't allow writing. 3367 */ 3368 if (vp->v_flag & VTEXT) 3369 return (ETXTBSY); 3370 } 3371 error = VOP_GETATTR(vp, &vattr, cred, p); 3372 if (error) 3373 return (error); 3374 error = VOP_ACCESS(vp, flags, cred, p); 3375 /* 3376 * Allow certain operations for the owner (reads and writes 3377 * on files that are already open). 3378 */ 3379 if (override && error == EACCES && cred->cr_uid == vattr.va_uid) 3380 error = 0; 3381 return error; 3382 } 3383
Indexes created Mon Sep 22 21:09:42 GMT 2025