nfs_serv.c revision 1.54
1 /* $NetBSD: nfs_serv.c,v 1.54 2000/03/30 12:51:15 augustss Exp $ */ 2 3 /* 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Rick Macklem at The University of Guelph. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)nfs_serv.c 8.8 (Berkeley) 7/31/95 39 */ 40 41 /* 42 * nfs version 2 and 3 server calls to vnode ops 43 * - these routines generally have 3 phases 44 * 1 - break down and validate rpc request in mbuf list 45 * 2 - do the vnode ops for the request 46 * (surprisingly ?? many are very similar to syscalls in vfs_syscalls.c) 47 * 3 - build the rpc reply in an mbuf list 48 * nb: 49 * - do not mix the phases, since the nfsm_?? macros can return failures 50 * on a bad rpc or similar and do not do any vrele() or vput()'s 51 * 52 * - the nfsm_reply() macro generates an nfs rpc reply with the nfs 53 * error number iff error != 0 whereas 54 * returning an error from the server function implies a fatal error 55 * such as a badly constructed rpc request that should be dropped without 56 * a reply. 57 * For Version 3, nfsm_reply() does not return for the error case, since 58 * most version 3 rpcs return more than the status for error cases. 59 */ 60 61 #include <sys/param.h> 62 #include <sys/systm.h> 63 #include <sys/proc.h> 64 #include <sys/file.h> 65 #include <sys/namei.h> 66 #include <sys/vnode.h> 67 #include <sys/mount.h> 68 #include <sys/socket.h> 69 #include <sys/socketvar.h> 70 #include <sys/mbuf.h> 71 #include <sys/dirent.h> 72 #include <sys/stat.h> 73 #include <sys/kernel.h> 74 #include <ufs/ufs/dir.h> 75 76 #include <vm/vm.h> 77 78 #include <uvm/uvm_extern.h> 79 80 #include <nfs/nfsproto.h> 81 #include <nfs/rpcv2.h> 82 #include <nfs/nfs.h> 83 #include <nfs/xdr_subs.h> 84 #include <nfs/nfsm_subs.h> 85 #include <nfs/nqnfs.h> 86 #include <nfs/nfs_var.h> 87 88 /* Global vars */ 89 extern u_int32_t nfs_xdrneg1; 90 extern u_int32_t nfs_false, nfs_true; 91 extern enum vtype nv3tov_type[8]; 92 extern struct nfsstats nfsstats; 93 extern nfstype nfsv2_type[9]; 94 extern nfstype nfsv3_type[9]; 95 int nfsrvw_procrastinate = NFS_GATHERDELAY * 1000; 96 97 /* 98 * nfs v3 access service 99 */ 100 int 101 nfsrv3_access(nfsd, slp, procp, mrq) 102 struct nfsrv_descript *nfsd; 103 struct nfssvc_sock *slp; 104 struct proc *procp; 105 struct mbuf **mrq; 106 { 107 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 108 struct mbuf *nam = nfsd->nd_nam; 109 caddr_t dpos = nfsd->nd_dpos; 110 struct ucred *cred = &nfsd->nd_cr; 111 struct vnode *vp; 112 nfsfh_t nfh; 113 fhandle_t *fhp; 114 u_int32_t *tl; 115 int32_t t1; 116 caddr_t bpos; 117 int error = 0, rdonly, cache = 0, getret; 118 char *cp2; 119 struct mbuf *mb, *mreq, *mb2; 120 struct vattr va; 121 u_long inmode, testmode, outmode; 122 u_quad_t frev; 123 124 fhp = &nfh.fh_generic; 125 nfsm_srvmtofh(fhp); 126 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 127 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, &rdonly, 128 (nfsd->nd_flag & ND_KERBAUTH), FALSE); 129 if (error) { 130 nfsm_reply(NFSX_UNSIGNED); 131 nfsm_srvpostop_attr(1, (struct vattr *)0); 132 return (0); 133 } 134 inmode = fxdr_unsigned(u_int32_t, *tl); 135 outmode = 0; 136 if ((inmode & NFSV3ACCESS_READ) && 137 nfsrv_access(vp, VREAD, cred, rdonly, procp, 0) == 0) 138 outmode |= NFSV3ACCESS_READ; 139 if (vp->v_type != VDIR) { 140 testmode = inmode & (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND); 141 if (testmode && 142 nfsrv_access(vp, VWRITE, cred, rdonly, procp, 0) == 0) 143 outmode |= testmode; 144 if ((inmode & NFSV3ACCESS_EXECUTE) && 145 nfsrv_access(vp, VEXEC, cred, rdonly, procp, 0) == 0) 146 outmode |= NFSV3ACCESS_EXECUTE; 147 } else { 148 testmode = inmode & (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | 149 NFSV3ACCESS_DELETE); 150 if (testmode && 151 nfsrv_access(vp, VWRITE, cred, rdonly, procp, 0) == 0) 152 outmode |= testmode; 153 if ((inmode & NFSV3ACCESS_LOOKUP) && 154 nfsrv_access(vp, VEXEC, cred, rdonly, procp, 0) == 0) 155 outmode |= NFSV3ACCESS_LOOKUP; 156 } 157 getret = VOP_GETATTR(vp, &va, cred, procp); 158 vput(vp); 159 nfsm_reply(NFSX_POSTOPATTR(1) + NFSX_UNSIGNED); 160 nfsm_srvpostop_attr(getret, &va); 161 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 162 *tl = txdr_unsigned(outmode); 163 nfsm_srvdone; 164 } 165 166 /* 167 * nfs getattr service 168 */ 169 int 170 nfsrv_getattr(nfsd, slp, procp, mrq) 171 struct nfsrv_descript *nfsd; 172 struct nfssvc_sock *slp; 173 struct proc *procp; 174 struct mbuf **mrq; 175 { 176 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 177 struct mbuf *nam = nfsd->nd_nam; 178 caddr_t dpos = nfsd->nd_dpos; 179 struct ucred *cred = &nfsd->nd_cr; 180 struct nfs_fattr *fp; 181 struct vattr va; 182 struct vnode *vp; 183 nfsfh_t nfh; 184 fhandle_t *fhp; 185 u_int32_t *tl; 186 int32_t t1; 187 caddr_t bpos; 188 int error = 0, rdonly, cache; 189 char *cp2; 190 struct mbuf *mb, *mb2, *mreq; 191 u_quad_t frev; 192 193 fhp = &nfh.fh_generic; 194 nfsm_srvmtofh(fhp); 195 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, &rdonly, 196 (nfsd->nd_flag & ND_KERBAUTH), FALSE); 197 if (error) { 198 nfsm_reply(0); 199 return (0); 200 } 201 nqsrv_getl(vp, ND_READ); 202 error = VOP_GETATTR(vp, &va, cred, procp); 203 vput(vp); 204 nfsm_reply(NFSX_FATTR(nfsd->nd_flag & ND_NFSV3)); 205 if (error) 206 return (0); 207 nfsm_build(fp, struct nfs_fattr *, NFSX_FATTR(nfsd->nd_flag & ND_NFSV3)); 208 nfsm_srvfillattr(&va, fp); 209 nfsm_srvdone; 210 } 211 212 /* 213 * nfs setattr service 214 */ 215 int 216 nfsrv_setattr(nfsd, slp, procp, mrq) 217 struct nfsrv_descript *nfsd; 218 struct nfssvc_sock *slp; 219 struct proc *procp; 220 struct mbuf **mrq; 221 { 222 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 223 struct mbuf *nam = nfsd->nd_nam; 224 caddr_t dpos = nfsd->nd_dpos; 225 struct ucred *cred = &nfsd->nd_cr; 226 struct vattr va, preat; 227 struct nfsv2_sattr *sp; 228 struct nfs_fattr *fp; 229 struct vnode *vp; 230 nfsfh_t nfh; 231 fhandle_t *fhp; 232 u_int32_t *tl; 233 int32_t t1; 234 caddr_t bpos; 235 int error = 0, rdonly, cache, preat_ret = 1, postat_ret = 1; 236 int v3 = (nfsd->nd_flag & ND_NFSV3), gcheck = 0; 237 char *cp2; 238 struct mbuf *mb, *mb2, *mreq; 239 u_quad_t frev; 240 struct timespec guard; 241 242 fhp = &nfh.fh_generic; 243 nfsm_srvmtofh(fhp); 244 VATTR_NULL(&va); 245 if (v3) { 246 nfsm_srvsattr(&va); 247 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 248 gcheck = fxdr_unsigned(int, *tl); 249 if (gcheck) { 250 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 251 fxdr_nfsv3time(tl, &guard); 252 } 253 } else { 254 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 255 /* 256 * Nah nah nah nah na nah 257 * There is a bug in the Sun client that puts 0xffff in the mode 258 * field of sattr when it should put in 0xffffffff. The u_short 259 * doesn't sign extend. 260 * --> check the low order 2 bytes for 0xffff 261 */ 262 if ((fxdr_unsigned(int, sp->sa_mode) & 0xffff) != 0xffff) 263 va.va_mode = nfstov_mode(sp->sa_mode); 264 if (sp->sa_uid != nfs_xdrneg1) 265 va.va_uid = fxdr_unsigned(uid_t, sp->sa_uid); 266 if (sp->sa_gid != nfs_xdrneg1) 267 va.va_gid = fxdr_unsigned(gid_t, sp->sa_gid); 268 if (sp->sa_size != nfs_xdrneg1) 269 va.va_size = fxdr_unsigned(u_quad_t, sp->sa_size); 270 if (sp->sa_atime.nfsv2_sec != nfs_xdrneg1) { 271 #ifdef notyet 272 fxdr_nfsv2time(&sp->sa_atime, &va.va_atime); 273 #else 274 va.va_atime.tv_sec = 275 fxdr_unsigned(u_int32_t,sp->sa_atime.nfsv2_sec); 276 va.va_atime.tv_nsec = 0; 277 #endif 278 } 279 if (sp->sa_mtime.nfsv2_sec != nfs_xdrneg1) 280 fxdr_nfsv2time(&sp->sa_mtime, &va.va_mtime); 281 282 } 283 284 /* 285 * Now that we have all the fields, lets do it. 286 */ 287 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, &rdonly, 288 (nfsd->nd_flag & ND_KERBAUTH), FALSE); 289 if (error) { 290 nfsm_reply(2 * NFSX_UNSIGNED); 291 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 292 return (0); 293 } 294 nqsrv_getl(vp, ND_WRITE); 295 if (v3) { 296 error = preat_ret = VOP_GETATTR(vp, &preat, cred, procp); 297 if (!error && gcheck && 298 (preat.va_ctime.tv_sec != guard.tv_sec || 299 preat.va_ctime.tv_nsec != guard.tv_nsec)) 300 error = NFSERR_NOT_SYNC; 301 if (error) { 302 vput(vp); 303 nfsm_reply(NFSX_WCCDATA(v3)); 304 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 305 return (0); 306 } 307 } 308 309 /* 310 * If the size is being changed write acces is required, otherwise 311 * just check for a read only file system. 312 */ 313 if (va.va_size == ((u_quad_t)((quad_t) -1))) { 314 if (rdonly || (vp->v_mount->mnt_flag & MNT_RDONLY)) { 315 error = EROFS; 316 goto out; 317 } 318 } else { 319 if (vp->v_type == VDIR) { 320 error = EISDIR; 321 goto out; 322 } else if ((error = nfsrv_access(vp, VWRITE, cred, rdonly, 323 procp, 0)) != 0) 324 goto out; 325 } 326 error = VOP_SETATTR(vp, &va, cred, procp); 327 postat_ret = VOP_GETATTR(vp, &va, cred, procp); 328 if (!error) 329 error = postat_ret; 330 out: 331 vput(vp); 332 nfsm_reply(NFSX_WCCORFATTR(v3)); 333 if (v3) { 334 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 335 return (0); 336 } else { 337 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 338 nfsm_srvfillattr(&va, fp); 339 } 340 nfsm_srvdone; 341 } 342 343 /* 344 * nfs lookup rpc 345 */ 346 int 347 nfsrv_lookup(nfsd, slp, procp, mrq) 348 struct nfsrv_descript *nfsd; 349 struct nfssvc_sock *slp; 350 struct proc *procp; 351 struct mbuf **mrq; 352 { 353 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 354 struct mbuf *nam = nfsd->nd_nam; 355 caddr_t dpos = nfsd->nd_dpos; 356 struct ucred *cred = &nfsd->nd_cr; 357 struct nfs_fattr *fp; 358 struct nameidata nd, ind, *ndp = &nd; 359 struct vnode *vp, *dirp; 360 nfsfh_t nfh; 361 fhandle_t *fhp; 362 caddr_t cp; 363 u_int32_t *tl; 364 int32_t t1; 365 caddr_t bpos; 366 int error = 0, cache, len, dirattr_ret = 1; 367 int v3 = (nfsd->nd_flag & ND_NFSV3), pubflag; 368 char *cp2; 369 struct mbuf *mb, *mb2, *mreq; 370 struct vattr va, dirattr; 371 u_quad_t frev; 372 373 fhp = &nfh.fh_generic; 374 nfsm_srvmtofh(fhp); 375 nfsm_srvnamesiz(len); 376 377 pubflag = nfs_ispublicfh(fhp); 378 379 nd.ni_cnd.cn_cred = cred; 380 nd.ni_cnd.cn_nameiop = LOOKUP; 381 nd.ni_cnd.cn_flags = LOCKLEAF | SAVESTART; 382 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 383 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), pubflag); 384 385 if (!error && pubflag) { 386 if (nd.ni_vp->v_type == VDIR && nfs_pub.np_index != NULL) { 387 /* 388 * Setup call to lookup() to see if we can find 389 * the index file. Arguably, this doesn't belong 390 * in a kernel.. Ugh. 391 */ 392 ind = nd; 393 VOP_UNLOCK(nd.ni_vp, 0); 394 ind.ni_pathlen = strlen(nfs_pub.np_index); 395 ind.ni_cnd.cn_nameptr = ind.ni_cnd.cn_pnbuf = 396 nfs_pub.np_index; 397 ind.ni_startdir = nd.ni_vp; 398 VREF(ind.ni_startdir); 399 error = lookup(&ind); 400 if (!error) { 401 /* 402 * Found an index file. Get rid of 403 * the old references. 404 */ 405 if (dirp) 406 vrele(dirp); 407 dirp = nd.ni_vp; 408 vrele(nd.ni_startdir); 409 ndp = &ind; 410 } else 411 error = 0; 412 } 413 /* 414 * If the public filehandle was used, check that this lookup 415 * didn't result in a filehandle outside the publicly exported 416 * filesystem. 417 */ 418 419 if (!error && ndp->ni_vp->v_mount != nfs_pub.np_mount) { 420 vput(nd.ni_vp); 421 error = EPERM; 422 } 423 } 424 425 if (dirp) { 426 if (v3) 427 dirattr_ret = VOP_GETATTR(dirp, &dirattr, cred, 428 procp); 429 vrele(dirp); 430 } 431 432 if (error) { 433 nfsm_reply(NFSX_POSTOPATTR(v3)); 434 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 435 return (0); 436 } 437 438 nqsrv_getl(ndp->ni_startdir, ND_READ); 439 vrele(ndp->ni_startdir); 440 FREE(nd.ni_cnd.cn_pnbuf, M_NAMEI); 441 vp = ndp->ni_vp; 442 memset((caddr_t)fhp, 0, sizeof(nfh)); 443 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; 444 error = VFS_VPTOFH(vp, &fhp->fh_fid); 445 if (!error) 446 error = VOP_GETATTR(vp, &va, cred, procp); 447 vput(vp); 448 nfsm_reply(NFSX_SRVFH(v3) + NFSX_POSTOPORFATTR(v3) + NFSX_POSTOPATTR(v3)); 449 if (error) { 450 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 451 return (0); 452 } 453 nfsm_srvfhtom(fhp, v3); 454 if (v3) { 455 nfsm_srvpostop_attr(0, &va); 456 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 457 } else { 458 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 459 nfsm_srvfillattr(&va, fp); 460 } 461 nfsm_srvdone; 462 } 463 464 /* 465 * nfs readlink service 466 */ 467 int 468 nfsrv_readlink(nfsd, slp, procp, mrq) 469 struct nfsrv_descript *nfsd; 470 struct nfssvc_sock *slp; 471 struct proc *procp; 472 struct mbuf **mrq; 473 { 474 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 475 struct mbuf *nam = nfsd->nd_nam; 476 caddr_t dpos = nfsd->nd_dpos; 477 struct ucred *cred = &nfsd->nd_cr; 478 struct iovec iv[(NFS_MAXPATHLEN+MLEN-1)/MLEN]; 479 struct iovec *ivp = iv; 480 struct mbuf *mp; 481 u_int32_t *tl; 482 int32_t t1; 483 caddr_t bpos; 484 int error = 0, rdonly, cache, i, tlen, len, getret; 485 int v3 = (nfsd->nd_flag & ND_NFSV3); 486 char *cp2; 487 struct mbuf *mb, *mb2, *mp2 = NULL, *mp3 = NULL, *mreq; 488 struct vnode *vp; 489 struct vattr attr; 490 nfsfh_t nfh; 491 fhandle_t *fhp; 492 struct uio io, *uiop = &io; 493 u_quad_t frev; 494 495 fhp = &nfh.fh_generic; 496 nfsm_srvmtofh(fhp); 497 len = 0; 498 i = 0; 499 while (len < NFS_MAXPATHLEN) { 500 MGET(mp, M_WAIT, MT_DATA); 501 MCLGET(mp, M_WAIT); 502 mp->m_len = NFSMSIZ(mp); 503 if (len == 0) 504 mp3 = mp2 = mp; 505 else { 506 mp2->m_next = mp; 507 mp2 = mp; 508 } 509 if ((len+mp->m_len) > NFS_MAXPATHLEN) { 510 mp->m_len = NFS_MAXPATHLEN-len; 511 len = NFS_MAXPATHLEN; 512 } else 513 len += mp->m_len; 514 ivp->iov_base = mtod(mp, caddr_t); 515 ivp->iov_len = mp->m_len; 516 i++; 517 ivp++; 518 } 519 uiop->uio_iov = iv; 520 uiop->uio_iovcnt = i; 521 uiop->uio_offset = 0; 522 uiop->uio_resid = len; 523 uiop->uio_rw = UIO_READ; 524 uiop->uio_segflg = UIO_SYSSPACE; 525 uiop->uio_procp = (struct proc *)0; 526 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 527 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 528 if (error) { 529 m_freem(mp3); 530 nfsm_reply(2 * NFSX_UNSIGNED); 531 nfsm_srvpostop_attr(1, (struct vattr *)0); 532 return (0); 533 } 534 if (vp->v_type != VLNK) { 535 if (v3) 536 error = EINVAL; 537 else 538 error = ENXIO; 539 goto out; 540 } 541 nqsrv_getl(vp, ND_READ); 542 error = VOP_READLINK(vp, uiop, cred); 543 out: 544 getret = VOP_GETATTR(vp, &attr, cred, procp); 545 vput(vp); 546 if (error) 547 m_freem(mp3); 548 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_UNSIGNED); 549 if (v3) { 550 nfsm_srvpostop_attr(getret, &attr); 551 if (error) 552 return (0); 553 } 554 if (uiop->uio_resid > 0) { 555 len -= uiop->uio_resid; 556 tlen = nfsm_rndup(len); 557 nfsm_adj(mp3, NFS_MAXPATHLEN-tlen, tlen-len); 558 } 559 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 560 *tl = txdr_unsigned(len); 561 mb->m_next = mp3; 562 nfsm_srvdone; 563 } 564 565 /* 566 * nfs read service 567 */ 568 int 569 nfsrv_read(nfsd, slp, procp, mrq) 570 struct nfsrv_descript *nfsd; 571 struct nfssvc_sock *slp; 572 struct proc *procp; 573 struct mbuf **mrq; 574 { 575 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 576 struct mbuf *nam = nfsd->nd_nam; 577 caddr_t dpos = nfsd->nd_dpos; 578 struct ucred *cred = &nfsd->nd_cr; 579 struct iovec *iv; 580 struct iovec *iv2; 581 struct mbuf *m; 582 struct nfs_fattr *fp; 583 u_int32_t *tl; 584 int32_t t1; 585 int i; 586 caddr_t bpos; 587 int error = 0, rdonly, cache, cnt, len, left, siz, tlen, getret; 588 int v3 = (nfsd->nd_flag & ND_NFSV3), reqlen; 589 char *cp2; 590 struct mbuf *mb, *mb2, *mreq; 591 struct mbuf *m2; 592 struct vnode *vp; 593 nfsfh_t nfh; 594 fhandle_t *fhp; 595 struct uio io, *uiop = &io; 596 struct vattr va; 597 off_t off; 598 u_quad_t frev; 599 600 fhp = &nfh.fh_generic; 601 nfsm_srvmtofh(fhp); 602 if (v3) { 603 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 604 off = fxdr_hyper(tl); 605 } else { 606 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 607 off = (off_t)fxdr_unsigned(u_int32_t, *tl); 608 } 609 nfsm_srvstrsiz(reqlen, NFS_SRVMAXDATA(nfsd)); 610 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 611 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 612 if (error) { 613 nfsm_reply(2 * NFSX_UNSIGNED); 614 nfsm_srvpostop_attr(1, (struct vattr *)0); 615 return (0); 616 } 617 if (vp->v_type != VREG) { 618 if (v3) 619 error = EINVAL; 620 else 621 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 622 } 623 if (!error) { 624 nqsrv_getl(vp, ND_READ); 625 if ((error = nfsrv_access(vp, VREAD, cred, rdonly, procp, 1)) != 0) 626 error = nfsrv_access(vp, VEXEC, cred, rdonly, procp, 1); 627 } 628 getret = VOP_GETATTR(vp, &va, cred, procp); 629 if (!error) 630 error = getret; 631 if (error) { 632 vput(vp); 633 nfsm_reply(NFSX_POSTOPATTR(v3)); 634 nfsm_srvpostop_attr(getret, &va); 635 return (0); 636 } 637 if (off >= va.va_size) 638 cnt = 0; 639 else if ((off + reqlen) > va.va_size) 640 cnt = nfsm_rndup(va.va_size - off); 641 else 642 cnt = reqlen; 643 nfsm_reply(NFSX_POSTOPORFATTR(v3) + 3 * NFSX_UNSIGNED+nfsm_rndup(cnt)); 644 if (v3) { 645 nfsm_build(tl, u_int32_t *, NFSX_V3FATTR + 4 * NFSX_UNSIGNED); 646 *tl++ = nfs_true; 647 fp = (struct nfs_fattr *)tl; 648 tl += (NFSX_V3FATTR / sizeof (u_int32_t)); 649 } else { 650 nfsm_build(tl, u_int32_t *, NFSX_V2FATTR + NFSX_UNSIGNED); 651 fp = (struct nfs_fattr *)tl; 652 tl += (NFSX_V2FATTR / sizeof (u_int32_t)); 653 } 654 len = left = cnt; 655 if (cnt > 0) { 656 /* 657 * Generate the mbuf list with the uio_iov ref. to it. 658 */ 659 i = 0; 660 m = m2 = mb; 661 while (left > 0) { 662 siz = min(M_TRAILINGSPACE(m), left); 663 if (siz > 0) { 664 left -= siz; 665 i++; 666 } 667 if (left > 0) { 668 MGET(m, M_WAIT, MT_DATA); 669 MCLGET(m, M_WAIT); 670 m->m_len = 0; 671 m2->m_next = m; 672 m2 = m; 673 } 674 } 675 MALLOC(iv, struct iovec *, i * sizeof (struct iovec), 676 M_TEMP, M_WAITOK); 677 uiop->uio_iov = iv2 = iv; 678 m = mb; 679 left = cnt; 680 i = 0; 681 while (left > 0) { 682 if (m == NULL) 683 panic("nfsrv_read iov"); 684 siz = min(M_TRAILINGSPACE(m), left); 685 if (siz > 0) { 686 iv->iov_base = mtod(m, caddr_t) + m->m_len; 687 iv->iov_len = siz; 688 m->m_len += siz; 689 left -= siz; 690 iv++; 691 i++; 692 } 693 m = m->m_next; 694 } 695 uiop->uio_iovcnt = i; 696 uiop->uio_offset = off; 697 uiop->uio_resid = cnt; 698 uiop->uio_rw = UIO_READ; 699 uiop->uio_segflg = UIO_SYSSPACE; 700 error = VOP_READ(vp, uiop, IO_NODELOCKED, cred); 701 off = uiop->uio_offset; 702 FREE((caddr_t)iv2, M_TEMP); 703 if (error || (getret = VOP_GETATTR(vp, &va, cred, procp)) != 0){ 704 if (!error) 705 error = getret; 706 m_freem(mreq); 707 vput(vp); 708 nfsm_reply(NFSX_POSTOPATTR(v3)); 709 nfsm_srvpostop_attr(getret, &va); 710 return (0); 711 } 712 } else 713 uiop->uio_resid = 0; 714 vput(vp); 715 nfsm_srvfillattr(&va, fp); 716 len -= uiop->uio_resid; 717 tlen = nfsm_rndup(len); 718 if (cnt != tlen || tlen != len) 719 nfsm_adj(mb, cnt - tlen, tlen - len); 720 if (v3) { 721 *tl++ = txdr_unsigned(len); 722 if (len < reqlen) 723 *tl++ = nfs_true; 724 else 725 *tl++ = nfs_false; 726 } 727 *tl = txdr_unsigned(len); 728 nfsm_srvdone; 729 } 730 731 /* 732 * nfs write service 733 */ 734 int 735 nfsrv_write(nfsd, slp, procp, mrq) 736 struct nfsrv_descript *nfsd; 737 struct nfssvc_sock *slp; 738 struct proc *procp; 739 struct mbuf **mrq; 740 { 741 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 742 struct mbuf *nam = nfsd->nd_nam; 743 caddr_t dpos = nfsd->nd_dpos; 744 struct ucred *cred = &nfsd->nd_cr; 745 struct iovec *ivp; 746 int i, cnt; 747 struct mbuf *mp; 748 struct nfs_fattr *fp; 749 struct iovec *iv; 750 struct vattr va, forat; 751 u_int32_t *tl; 752 int32_t t1; 753 caddr_t bpos; 754 int error = 0, rdonly, cache, len, forat_ret = 1; 755 int ioflags, aftat_ret = 1, retlen, zeroing, adjust; 756 int stable = NFSV3WRITE_FILESYNC; 757 int v3 = (nfsd->nd_flag & ND_NFSV3); 758 char *cp2; 759 struct mbuf *mb, *mb2, *mreq; 760 struct vnode *vp; 761 nfsfh_t nfh; 762 fhandle_t *fhp; 763 struct uio io, *uiop = &io; 764 off_t off; 765 u_quad_t frev; 766 767 if (mrep == NULL) { 768 *mrq = NULL; 769 return (0); 770 } 771 fhp = &nfh.fh_generic; 772 nfsm_srvmtofh(fhp); 773 if (v3) { 774 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 775 off = fxdr_hyper(tl); 776 tl += 3; 777 stable = fxdr_unsigned(int, *tl++); 778 } else { 779 nfsm_dissect(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 780 off = (off_t)fxdr_unsigned(u_int32_t, *++tl); 781 tl += 2; 782 } 783 retlen = len = fxdr_unsigned(int32_t, *tl); 784 cnt = i = 0; 785 786 /* 787 * For NFS Version 2, it is not obvious what a write of zero length 788 * should do, but I might as well be consistent with Version 3, 789 * which is to return ok so long as there are no permission problems. 790 */ 791 if (len > 0) { 792 zeroing = 1; 793 mp = mrep; 794 while (mp) { 795 if (mp == md) { 796 zeroing = 0; 797 adjust = dpos - mtod(mp, caddr_t); 798 mp->m_len -= adjust; 799 if (mp->m_len > 0 && adjust > 0) 800 NFSMADV(mp, adjust); 801 } 802 if (zeroing) 803 mp->m_len = 0; 804 else if (mp->m_len > 0) { 805 i += mp->m_len; 806 if (i > len) { 807 mp->m_len -= (i - len); 808 zeroing = 1; 809 } 810 if (mp->m_len > 0) 811 cnt++; 812 } 813 mp = mp->m_next; 814 } 815 } 816 if (len > NFS_MAXDATA || len < 0 || i < len) { 817 error = EIO; 818 nfsm_reply(2 * NFSX_UNSIGNED); 819 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 820 return (0); 821 } 822 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 823 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 824 if (error) { 825 nfsm_reply(2 * NFSX_UNSIGNED); 826 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 827 return (0); 828 } 829 if (v3) 830 forat_ret = VOP_GETATTR(vp, &forat, cred, procp); 831 if (vp->v_type != VREG) { 832 if (v3) 833 error = EINVAL; 834 else 835 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 836 } 837 if (!error) { 838 nqsrv_getl(vp, ND_WRITE); 839 error = nfsrv_access(vp, VWRITE, cred, rdonly, procp, 1); 840 } 841 if (error) { 842 vput(vp); 843 nfsm_reply(NFSX_WCCDATA(v3)); 844 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 845 return (0); 846 } 847 848 if (len > 0) { 849 MALLOC(ivp, struct iovec *, cnt * sizeof (struct iovec), M_TEMP, 850 M_WAITOK); 851 uiop->uio_iov = iv = ivp; 852 uiop->uio_iovcnt = cnt; 853 mp = mrep; 854 while (mp) { 855 if (mp->m_len > 0) { 856 ivp->iov_base = mtod(mp, caddr_t); 857 ivp->iov_len = mp->m_len; 858 ivp++; 859 } 860 mp = mp->m_next; 861 } 862 863 /* 864 * XXX 865 * The IO_METASYNC flag indicates that all metadata (and not just 866 * enough to ensure data integrity) mus be written to stable storage 867 * synchronously. 868 * (IO_METASYNC is not yet implemented in 4.4BSD-Lite.) 869 */ 870 if (stable == NFSV3WRITE_UNSTABLE) 871 ioflags = IO_NODELOCKED; 872 else if (stable == NFSV3WRITE_DATASYNC) 873 ioflags = (IO_SYNC | IO_NODELOCKED); 874 else 875 ioflags = (IO_METASYNC | IO_SYNC | IO_NODELOCKED); 876 uiop->uio_resid = len; 877 uiop->uio_rw = UIO_WRITE; 878 uiop->uio_segflg = UIO_SYSSPACE; 879 uiop->uio_procp = (struct proc *)0; 880 uiop->uio_offset = off; 881 error = VOP_WRITE(vp, uiop, ioflags, cred); 882 nfsstats.srvvop_writes++; 883 FREE((caddr_t)iv, M_TEMP); 884 } 885 aftat_ret = VOP_GETATTR(vp, &va, cred, procp); 886 vput(vp); 887 if (!error) 888 error = aftat_ret; 889 nfsm_reply(NFSX_PREOPATTR(v3) + NFSX_POSTOPORFATTR(v3) + 890 2 * NFSX_UNSIGNED + NFSX_WRITEVERF(v3)); 891 if (v3) { 892 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 893 if (error) 894 return (0); 895 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 896 *tl++ = txdr_unsigned(retlen); 897 if (stable == NFSV3WRITE_UNSTABLE) 898 *tl++ = txdr_unsigned(stable); 899 else 900 *tl++ = txdr_unsigned(NFSV3WRITE_FILESYNC); 901 /* 902 * Actually, there is no need to txdr these fields, 903 * but it may make the values more human readable, 904 * for debugging purposes. 905 */ 906 *tl++ = txdr_unsigned(boottime.tv_sec); 907 *tl = txdr_unsigned(boottime.tv_usec); 908 } else { 909 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 910 nfsm_srvfillattr(&va, fp); 911 } 912 nfsm_srvdone; 913 } 914 915 /* 916 * NFS write service with write gathering support. Called when 917 * nfsrvw_procrastinate > 0. 918 * See: Chet Juszczak, "Improving the Write Performance of an NFS Server", 919 * in Proc. of the Winter 1994 Usenix Conference, pg. 247-259, San Franscisco, 920 * Jan. 1994. 921 */ 922 int 923 nfsrv_writegather(ndp, slp, procp, mrq) 924 struct nfsrv_descript **ndp; 925 struct nfssvc_sock *slp; 926 struct proc *procp; 927 struct mbuf **mrq; 928 { 929 struct iovec *ivp; 930 struct mbuf *mp; 931 struct nfsrv_descript *wp, *nfsd, *owp, *swp; 932 struct nfs_fattr *fp; 933 int i = 0; 934 struct iovec *iov; 935 struct nfsrvw_delayhash *wpp; 936 struct ucred *cred; 937 struct vattr va, forat; 938 u_int32_t *tl; 939 int32_t t1; 940 caddr_t bpos, dpos; 941 int error = 0, rdonly, cache, len = 0, forat_ret = 1; 942 int ioflags, aftat_ret = 1, s, adjust, v3, zeroing; 943 char *cp2; 944 struct mbuf *mb, *mb2, *mreq, *mrep, *md; 945 struct vnode *vp; 946 struct uio io, *uiop = &io; 947 u_quad_t frev, cur_usec; 948 949 *mrq = NULL; 950 if (*ndp) { 951 nfsd = *ndp; 952 *ndp = NULL; 953 mrep = nfsd->nd_mrep; 954 md = nfsd->nd_md; 955 dpos = nfsd->nd_dpos; 956 cred = &nfsd->nd_cr; 957 v3 = (nfsd->nd_flag & ND_NFSV3); 958 LIST_INIT(&nfsd->nd_coalesce); 959 nfsd->nd_mreq = NULL; 960 nfsd->nd_stable = NFSV3WRITE_FILESYNC; 961 cur_usec = (u_quad_t)time.tv_sec * 1000000 + (u_quad_t)time.tv_usec; 962 nfsd->nd_time = cur_usec + nfsrvw_procrastinate; 963 964 /* 965 * Now, get the write header.. 966 */ 967 nfsm_srvmtofh(&nfsd->nd_fh); 968 if (v3) { 969 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 970 nfsd->nd_off = fxdr_hyper(tl); 971 tl += 3; 972 nfsd->nd_stable = fxdr_unsigned(int, *tl++); 973 } else { 974 nfsm_dissect(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 975 nfsd->nd_off = (off_t)fxdr_unsigned(u_int32_t, *++tl); 976 tl += 2; 977 } 978 len = fxdr_unsigned(int32_t, *tl); 979 nfsd->nd_len = len; 980 nfsd->nd_eoff = nfsd->nd_off + len; 981 982 /* 983 * Trim the header out of the mbuf list and trim off any trailing 984 * junk so that the mbuf list has only the write data. 985 */ 986 zeroing = 1; 987 i = 0; 988 mp = mrep; 989 while (mp) { 990 if (mp == md) { 991 zeroing = 0; 992 adjust = dpos - mtod(mp, caddr_t); 993 mp->m_len -= adjust; 994 if (mp->m_len > 0 && adjust > 0) 995 NFSMADV(mp, adjust); 996 } 997 if (zeroing) 998 mp->m_len = 0; 999 else { 1000 i += mp->m_len; 1001 if (i > len) { 1002 mp->m_len -= (i - len); 1003 zeroing = 1; 1004 } 1005 } 1006 mp = mp->m_next; 1007 } 1008 if (len > NFS_MAXDATA || len < 0 || i < len) { 1009 nfsmout: 1010 m_freem(mrep); 1011 error = EIO; 1012 nfsm_writereply(2 * NFSX_UNSIGNED, v3); 1013 if (v3) 1014 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1015 nfsd->nd_mreq = mreq; 1016 nfsd->nd_mrep = NULL; 1017 nfsd->nd_time = 0; 1018 } 1019 1020 /* 1021 * Add this entry to the hash and time queues. 1022 */ 1023 s = splsoftclock(); 1024 owp = NULL; 1025 wp = slp->ns_tq.lh_first; 1026 while (wp && wp->nd_time < nfsd->nd_time) { 1027 owp = wp; 1028 wp = wp->nd_tq.le_next; 1029 } 1030 if (owp) { 1031 LIST_INSERT_AFTER(owp, nfsd, nd_tq); 1032 } else { 1033 LIST_INSERT_HEAD(&slp->ns_tq, nfsd, nd_tq); 1034 } 1035 if (nfsd->nd_mrep) { 1036 wpp = NWDELAYHASH(slp, nfsd->nd_fh.fh_fid.fid_data); 1037 owp = NULL; 1038 wp = wpp->lh_first; 1039 while (wp && 1040 memcmp((caddr_t)&nfsd->nd_fh, (caddr_t)&wp->nd_fh, NFSX_V3FH)) { 1041 owp = wp; 1042 wp = wp->nd_hash.le_next; 1043 } 1044 while (wp && wp->nd_off < nfsd->nd_off && 1045 !memcmp((caddr_t)&nfsd->nd_fh, (caddr_t)&wp->nd_fh, NFSX_V3FH)) { 1046 owp = wp; 1047 wp = wp->nd_hash.le_next; 1048 } 1049 if (owp) { 1050 LIST_INSERT_AFTER(owp, nfsd, nd_hash); 1051 1052 /* 1053 * Search the hash list for overlapping entries and 1054 * coalesce. 1055 */ 1056 for(; nfsd && NFSW_CONTIG(owp, nfsd); nfsd = wp) { 1057 wp = nfsd->nd_hash.le_next; 1058 if (NFSW_SAMECRED(owp, nfsd)) 1059 nfsrvw_coalesce(owp, nfsd); 1060 } 1061 } else { 1062 LIST_INSERT_HEAD(wpp, nfsd, nd_hash); 1063 } 1064 } 1065 splx(s); 1066 } 1067 1068 /* 1069 * Now, do VOP_WRITE()s for any one(s) that need to be done now 1070 * and generate the associated reply mbuf list(s). 1071 */ 1072 loop1: 1073 cur_usec = (u_quad_t)time.tv_sec * 1000000 + (u_quad_t)time.tv_usec; 1074 s = splsoftclock(); 1075 for (nfsd = slp->ns_tq.lh_first; nfsd; nfsd = owp) { 1076 owp = nfsd->nd_tq.le_next; 1077 if (nfsd->nd_time > cur_usec) 1078 break; 1079 if (nfsd->nd_mreq) 1080 continue; 1081 LIST_REMOVE(nfsd, nd_tq); 1082 LIST_REMOVE(nfsd, nd_hash); 1083 splx(s); 1084 mrep = nfsd->nd_mrep; 1085 nfsd->nd_mrep = NULL; 1086 cred = &nfsd->nd_cr; 1087 v3 = (nfsd->nd_flag & ND_NFSV3); 1088 forat_ret = aftat_ret = 1; 1089 error = nfsrv_fhtovp(&nfsd->nd_fh, 1, &vp, cred, slp, 1090 nfsd->nd_nam, &rdonly, (nfsd->nd_flag & ND_KERBAUTH), 1091 FALSE); 1092 if (!error) { 1093 if (v3) 1094 forat_ret = VOP_GETATTR(vp, &forat, cred, procp); 1095 if (vp->v_type != VREG) { 1096 if (v3) 1097 error = EINVAL; 1098 else 1099 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 1100 } 1101 } else 1102 vp = NULL; 1103 if (!error) { 1104 nqsrv_getl(vp, ND_WRITE); 1105 error = nfsrv_access(vp, VWRITE, cred, rdonly, procp, 1); 1106 } 1107 1108 if (nfsd->nd_stable == NFSV3WRITE_UNSTABLE) 1109 ioflags = IO_NODELOCKED; 1110 else if (nfsd->nd_stable == NFSV3WRITE_DATASYNC) 1111 ioflags = (IO_SYNC | IO_NODELOCKED); 1112 else 1113 ioflags = (IO_METASYNC | IO_SYNC | IO_NODELOCKED); 1114 uiop->uio_rw = UIO_WRITE; 1115 uiop->uio_segflg = UIO_SYSSPACE; 1116 uiop->uio_procp = (struct proc *)0; 1117 uiop->uio_offset = nfsd->nd_off; 1118 uiop->uio_resid = nfsd->nd_eoff - nfsd->nd_off; 1119 if (uiop->uio_resid > 0) { 1120 mp = mrep; 1121 i = 0; 1122 while (mp) { 1123 if (mp->m_len > 0) 1124 i++; 1125 mp = mp->m_next; 1126 } 1127 uiop->uio_iovcnt = i; 1128 MALLOC(iov, struct iovec *, i * sizeof (struct iovec), 1129 M_TEMP, M_WAITOK); 1130 uiop->uio_iov = ivp = iov; 1131 mp = mrep; 1132 while (mp) { 1133 if (mp->m_len > 0) { 1134 ivp->iov_base = mtod(mp, caddr_t); 1135 ivp->iov_len = mp->m_len; 1136 ivp++; 1137 } 1138 mp = mp->m_next; 1139 } 1140 if (!error) { 1141 error = VOP_WRITE(vp, uiop, ioflags, cred); 1142 nfsstats.srvvop_writes++; 1143 } 1144 FREE((caddr_t)iov, M_TEMP); 1145 } 1146 m_freem(mrep); 1147 if (vp) { 1148 aftat_ret = VOP_GETATTR(vp, &va, cred, procp); 1149 vput(vp); 1150 } 1151 1152 /* 1153 * Loop around generating replies for all write rpcs that have 1154 * now been completed. 1155 */ 1156 swp = nfsd; 1157 do { 1158 if (error) { 1159 nfsm_writereply(NFSX_WCCDATA(v3), v3); 1160 if (v3) { 1161 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1162 } 1163 } else { 1164 nfsm_writereply(NFSX_PREOPATTR(v3) + 1165 NFSX_POSTOPORFATTR(v3) + 2 * NFSX_UNSIGNED + 1166 NFSX_WRITEVERF(v3), v3); 1167 if (v3) { 1168 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1169 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1170 *tl++ = txdr_unsigned(nfsd->nd_len); 1171 *tl++ = txdr_unsigned(swp->nd_stable); 1172 /* 1173 * Actually, there is no need to txdr these fields, 1174 * but it may make the values more human readable, 1175 * for debugging purposes. 1176 */ 1177 *tl++ = txdr_unsigned(boottime.tv_sec); 1178 *tl = txdr_unsigned(boottime.tv_usec); 1179 } else { 1180 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 1181 nfsm_srvfillattr(&va, fp); 1182 } 1183 } 1184 nfsd->nd_mreq = mreq; 1185 if (nfsd->nd_mrep) 1186 panic("nfsrv_write: nd_mrep not free"); 1187 1188 /* 1189 * Done. Put it at the head of the timer queue so that 1190 * the final phase can return the reply. 1191 */ 1192 s = splsoftclock(); 1193 if (nfsd != swp) { 1194 nfsd->nd_time = 0; 1195 LIST_INSERT_HEAD(&slp->ns_tq, nfsd, nd_tq); 1196 } 1197 nfsd = swp->nd_coalesce.lh_first; 1198 if (nfsd) { 1199 LIST_REMOVE(nfsd, nd_tq); 1200 } 1201 splx(s); 1202 } while (nfsd); 1203 s = splsoftclock(); 1204 swp->nd_time = 0; 1205 LIST_INSERT_HEAD(&slp->ns_tq, swp, nd_tq); 1206 splx(s); 1207 goto loop1; 1208 } 1209 splx(s); 1210 1211 /* 1212 * Search for a reply to return. 1213 */ 1214 s = splsoftclock(); 1215 for (nfsd = slp->ns_tq.lh_first; nfsd; nfsd = nfsd->nd_tq.le_next) 1216 if (nfsd->nd_mreq) { 1217 LIST_REMOVE(nfsd, nd_tq); 1218 *mrq = nfsd->nd_mreq; 1219 *ndp = nfsd; 1220 break; 1221 } 1222 splx(s); 1223 return (0); 1224 } 1225 1226 /* 1227 * Coalesce the write request nfsd into owp. To do this we must: 1228 * - remove nfsd from the queues 1229 * - merge nfsd->nd_mrep into owp->nd_mrep 1230 * - update the nd_eoff and nd_stable for owp 1231 * - put nfsd on owp's nd_coalesce list 1232 * NB: Must be called at splsoftclock(). 1233 */ 1234 void 1235 nfsrvw_coalesce(owp, nfsd) 1236 struct nfsrv_descript *owp; 1237 struct nfsrv_descript *nfsd; 1238 { 1239 int overlap; 1240 struct mbuf *mp; 1241 1242 LIST_REMOVE(nfsd, nd_hash); 1243 LIST_REMOVE(nfsd, nd_tq); 1244 if (owp->nd_eoff < nfsd->nd_eoff) { 1245 overlap = owp->nd_eoff - nfsd->nd_off; 1246 if (overlap < 0) 1247 panic("nfsrv_coalesce: bad off"); 1248 if (overlap > 0) 1249 m_adj(nfsd->nd_mrep, overlap); 1250 mp = owp->nd_mrep; 1251 while (mp->m_next) 1252 mp = mp->m_next; 1253 mp->m_next = nfsd->nd_mrep; 1254 owp->nd_eoff = nfsd->nd_eoff; 1255 } else 1256 m_freem(nfsd->nd_mrep); 1257 nfsd->nd_mrep = NULL; 1258 if (nfsd->nd_stable == NFSV3WRITE_FILESYNC) 1259 owp->nd_stable = NFSV3WRITE_FILESYNC; 1260 else if (nfsd->nd_stable == NFSV3WRITE_DATASYNC && 1261 owp->nd_stable == NFSV3WRITE_UNSTABLE) 1262 owp->nd_stable = NFSV3WRITE_DATASYNC; 1263 LIST_INSERT_HEAD(&owp->nd_coalesce, nfsd, nd_tq); 1264 /* 1265 * nfsd might hold coalesce elements! Move them to owp. 1266 * Otherwise, requests may be lost and clients will be stuck. 1267 */ 1268 if (nfsd->nd_coalesce.lh_first) 1269 { 1270 struct nfsrv_descript *m; 1271 1272 while ((m = nfsd->nd_coalesce.lh_first)) 1273 { 1274 LIST_REMOVE(m, nd_tq); 1275 LIST_INSERT_HEAD(&owp->nd_coalesce, m, nd_tq); 1276 } 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, *mb2, *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 | SAVESTART; 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 vrele(nd.ni_startdir); 1391 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1392 error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1393 if (!error) { 1394 FREE(nd.ni_cnd.cn_pnbuf, M_NAMEI); 1395 if (exclusive_flag) { 1396 exclusive_flag = 0; 1397 VATTR_NULL(&va); 1398 memcpy((caddr_t)&va.va_atime, cverf, 1399 NFSX_V3CREATEVERF); 1400 error = VOP_SETATTR(nd.ni_vp, &va, cred, 1401 procp); 1402 } 1403 } 1404 } else if (va.va_type == VCHR || va.va_type == VBLK || 1405 va.va_type == VFIFO) { 1406 if (va.va_type == VCHR && rdev == 0xffffffff) 1407 va.va_type = VFIFO; 1408 if (va.va_type != VFIFO && 1409 (error = suser(cred, (u_short *)0))) { 1410 vrele(nd.ni_startdir); 1411 free(nd.ni_cnd.cn_pnbuf, M_NAMEI); 1412 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1413 vput(nd.ni_dvp); 1414 nfsm_reply(0); 1415 return (error); 1416 } else 1417 va.va_rdev = (dev_t)rdev; 1418 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1419 error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, 1420 &va); 1421 if (error) { 1422 vrele(nd.ni_startdir); 1423 nfsm_reply(0); 1424 } 1425 nd.ni_cnd.cn_nameiop = LOOKUP; 1426 nd.ni_cnd.cn_flags &= ~(LOCKPARENT | SAVESTART); 1427 nd.ni_cnd.cn_proc = procp; 1428 nd.ni_cnd.cn_cred = cred; 1429 if ((error = lookup(&nd)) != 0) { 1430 free(nd.ni_cnd.cn_pnbuf, M_NAMEI); 1431 nfsm_reply(0); 1432 } 1433 FREE(nd.ni_cnd.cn_pnbuf, M_NAMEI); 1434 if (nd.ni_cnd.cn_flags & ISSYMLINK) { 1435 vrele(nd.ni_dvp); 1436 vput(nd.ni_vp); 1437 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1438 error = EINVAL; 1439 nfsm_reply(0); 1440 } 1441 } else { 1442 vrele(nd.ni_startdir); 1443 free(nd.ni_cnd.cn_pnbuf, M_NAMEI); 1444 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1445 vput(nd.ni_dvp); 1446 error = ENXIO; 1447 } 1448 vp = nd.ni_vp; 1449 } else { 1450 vrele(nd.ni_startdir); 1451 free(nd.ni_cnd.cn_pnbuf, M_NAMEI); 1452 vp = nd.ni_vp; 1453 if (nd.ni_dvp == vp) 1454 vrele(nd.ni_dvp); 1455 else 1456 vput(nd.ni_dvp); 1457 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1458 if (!error && va.va_size != -1) { 1459 error = nfsrv_access(vp, VWRITE, cred, 1460 (nd.ni_cnd.cn_flags & RDONLY), procp, 0); 1461 if (!error) { 1462 nqsrv_getl(vp, ND_WRITE); 1463 tempsize = va.va_size; 1464 VATTR_NULL(&va); 1465 va.va_size = tempsize; 1466 error = VOP_SETATTR(vp, &va, cred, 1467 procp); 1468 } 1469 } 1470 if (error) 1471 vput(vp); 1472 } 1473 if (!error) { 1474 memset((caddr_t)fhp, 0, sizeof(nfh)); 1475 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; 1476 error = VFS_VPTOFH(vp, &fhp->fh_fid); 1477 if (!error) 1478 error = VOP_GETATTR(vp, &va, cred, procp); 1479 vput(vp); 1480 } 1481 if (v3) { 1482 if (exclusive_flag && !error && 1483 memcmp(cverf, (caddr_t)&va.va_atime, NFSX_V3CREATEVERF)) 1484 error = EEXIST; 1485 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 1486 vrele(dirp); 1487 } 1488 nfsm_reply(NFSX_SRVFH(v3) + NFSX_FATTR(v3) + NFSX_WCCDATA(v3)); 1489 if (v3) { 1490 if (!error) { 1491 nfsm_srvpostop_fh(fhp); 1492 nfsm_srvpostop_attr(0, &va); 1493 } 1494 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1495 } else { 1496 nfsm_srvfhtom(fhp, v3); 1497 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 1498 nfsm_srvfillattr(&va, fp); 1499 } 1500 return (0); 1501 nfsmout: 1502 if (dirp) 1503 vrele(dirp); 1504 if (nd.ni_cnd.cn_nameiop) { 1505 vrele(nd.ni_startdir); 1506 free((caddr_t)nd.ni_cnd.cn_pnbuf, M_NAMEI); 1507 } 1508 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1509 if (nd.ni_dvp == nd.ni_vp) 1510 vrele(nd.ni_dvp); 1511 else 1512 vput(nd.ni_dvp); 1513 if (nd.ni_vp) 1514 vput(nd.ni_vp); 1515 return (error); 1516 } 1517 1518 /* 1519 * nfs v3 mknod service 1520 */ 1521 int 1522 nfsrv_mknod(nfsd, slp, procp, mrq) 1523 struct nfsrv_descript *nfsd; 1524 struct nfssvc_sock *slp; 1525 struct proc *procp; 1526 struct mbuf **mrq; 1527 { 1528 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1529 struct mbuf *nam = nfsd->nd_nam; 1530 caddr_t dpos = nfsd->nd_dpos; 1531 struct ucred *cred = &nfsd->nd_cr; 1532 struct vattr va, dirfor, diraft; 1533 u_int32_t *tl; 1534 struct nameidata nd; 1535 int32_t t1; 1536 caddr_t bpos; 1537 int error = 0, cache, len, dirfor_ret = 1, diraft_ret = 1; 1538 u_int32_t major, minor; 1539 enum vtype vtyp; 1540 char *cp2; 1541 struct mbuf *mb, *mb2, *mreq; 1542 struct vnode *vp, *dirp = (struct vnode *)0; 1543 nfsfh_t nfh; 1544 fhandle_t *fhp; 1545 u_quad_t frev; 1546 1547 nd.ni_cnd.cn_nameiop = 0; 1548 fhp = &nfh.fh_generic; 1549 nfsm_srvmtofh(fhp); 1550 nfsm_srvnamesiz(len); 1551 nd.ni_cnd.cn_cred = cred; 1552 nd.ni_cnd.cn_nameiop = CREATE; 1553 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF | SAVESTART; 1554 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 1555 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1556 if (dirp) 1557 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, procp); 1558 if (error) { 1559 nfsm_reply(NFSX_WCCDATA(1)); 1560 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1561 if (dirp) 1562 vrele(dirp); 1563 return (0); 1564 } 1565 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1566 vtyp = nfsv3tov_type(*tl); 1567 if (vtyp != VCHR && vtyp != VBLK && vtyp != VSOCK && vtyp != VFIFO) { 1568 vrele(nd.ni_startdir); 1569 free((caddr_t)nd.ni_cnd.cn_pnbuf, M_NAMEI); 1570 error = NFSERR_BADTYPE; 1571 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1572 if (nd.ni_dvp == nd.ni_vp) 1573 vrele(nd.ni_dvp); 1574 else 1575 vput(nd.ni_dvp); 1576 if (nd.ni_vp) 1577 vput(nd.ni_vp); 1578 goto out; 1579 } 1580 VATTR_NULL(&va); 1581 nfsm_srvsattr(&va); 1582 if (vtyp == VCHR || vtyp == VBLK) { 1583 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1584 major = fxdr_unsigned(u_int32_t, *tl++); 1585 minor = fxdr_unsigned(u_int32_t, *tl); 1586 va.va_rdev = makedev(major, minor); 1587 } 1588 1589 /* 1590 * Iff doesn't exist, create it. 1591 */ 1592 if (nd.ni_vp) { 1593 vrele(nd.ni_startdir); 1594 free((caddr_t)nd.ni_cnd.cn_pnbuf, M_NAMEI); 1595 error = EEXIST; 1596 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1597 if (nd.ni_dvp == nd.ni_vp) 1598 vrele(nd.ni_dvp); 1599 else 1600 vput(nd.ni_dvp); 1601 vput(nd.ni_vp); 1602 goto out; 1603 } 1604 va.va_type = vtyp; 1605 if (vtyp == VSOCK) { 1606 vrele(nd.ni_startdir); 1607 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1608 error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1609 if (!error) 1610 FREE(nd.ni_cnd.cn_pnbuf, M_NAMEI); 1611 } else { 1612 if (va.va_type != VFIFO && 1613 (error = suser(cred, (u_short *)0))) { 1614 vrele(nd.ni_startdir); 1615 free((caddr_t)nd.ni_cnd.cn_pnbuf, M_NAMEI); 1616 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1617 vput(nd.ni_dvp); 1618 goto out; 1619 } 1620 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1621 error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1622 if (error) { 1623 vrele(nd.ni_startdir); 1624 goto out; 1625 } 1626 nd.ni_cnd.cn_nameiop = LOOKUP; 1627 nd.ni_cnd.cn_flags &= ~(LOCKPARENT | SAVESTART); 1628 nd.ni_cnd.cn_proc = procp; 1629 nd.ni_cnd.cn_cred = procp->p_ucred; 1630 error = lookup(&nd); 1631 FREE(nd.ni_cnd.cn_pnbuf, M_NAMEI); 1632 if (error) 1633 goto out; 1634 if (nd.ni_cnd.cn_flags & ISSYMLINK) { 1635 vrele(nd.ni_dvp); 1636 vput(nd.ni_vp); 1637 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1638 error = EINVAL; 1639 } 1640 } 1641 out: 1642 vp = nd.ni_vp; 1643 if (!error) { 1644 memset((caddr_t)fhp, 0, sizeof(nfh)); 1645 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; 1646 error = VFS_VPTOFH(vp, &fhp->fh_fid); 1647 if (!error) 1648 error = VOP_GETATTR(vp, &va, cred, procp); 1649 vput(vp); 1650 } 1651 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 1652 vrele(dirp); 1653 nfsm_reply(NFSX_SRVFH(1) + NFSX_POSTOPATTR(1) + NFSX_WCCDATA(1)); 1654 if (!error) { 1655 nfsm_srvpostop_fh(fhp); 1656 nfsm_srvpostop_attr(0, &va); 1657 } 1658 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1659 return (0); 1660 nfsmout: 1661 if (dirp) 1662 vrele(dirp); 1663 if (nd.ni_cnd.cn_nameiop) { 1664 vrele(nd.ni_startdir); 1665 free((caddr_t)nd.ni_cnd.cn_pnbuf, M_NAMEI); 1666 } 1667 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1668 if (nd.ni_dvp == nd.ni_vp) 1669 vrele(nd.ni_dvp); 1670 else 1671 vput(nd.ni_dvp); 1672 if (nd.ni_vp) 1673 vput(nd.ni_vp); 1674 return (error); 1675 } 1676 1677 /* 1678 * nfs remove service 1679 */ 1680 int 1681 nfsrv_remove(nfsd, slp, procp, mrq) 1682 struct nfsrv_descript *nfsd; 1683 struct nfssvc_sock *slp; 1684 struct proc *procp; 1685 struct mbuf **mrq; 1686 { 1687 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1688 struct mbuf *nam = nfsd->nd_nam; 1689 caddr_t dpos = nfsd->nd_dpos; 1690 struct ucred *cred = &nfsd->nd_cr; 1691 struct nameidata nd; 1692 u_int32_t *tl; 1693 int32_t t1; 1694 caddr_t bpos; 1695 int error = 0, cache, len, dirfor_ret = 1, diraft_ret = 1; 1696 int v3 = (nfsd->nd_flag & ND_NFSV3); 1697 char *cp2; 1698 struct mbuf *mb, *mreq; 1699 struct vnode *vp, *dirp; 1700 struct vattr dirfor, diraft; 1701 nfsfh_t nfh; 1702 fhandle_t *fhp; 1703 u_quad_t frev; 1704 1705 #ifndef nolint 1706 vp = (struct vnode *)0; 1707 #endif 1708 fhp = &nfh.fh_generic; 1709 nfsm_srvmtofh(fhp); 1710 nfsm_srvnamesiz(len); 1711 nd.ni_cnd.cn_cred = cred; 1712 nd.ni_cnd.cn_nameiop = DELETE; 1713 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 1714 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 1715 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1716 if (dirp) { 1717 if (v3) 1718 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 1719 procp); 1720 else 1721 vrele(dirp); 1722 } 1723 if (!error) { 1724 vp = nd.ni_vp; 1725 if (vp->v_type == VDIR && 1726 (error = suser(cred, (u_short *)0)) != 0) 1727 goto out; 1728 /* 1729 * The root of a mounted filesystem cannot be deleted. 1730 */ 1731 if (vp->v_flag & VROOT) { 1732 error = EBUSY; 1733 goto out; 1734 } 1735 out: 1736 if (!error) { 1737 (void)uvm_vnp_uncache(vp); 1738 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1739 nqsrv_getl(vp, ND_WRITE); 1740 error = VOP_REMOVE(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); 1741 } else { 1742 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1743 if (nd.ni_dvp == vp) 1744 vrele(nd.ni_dvp); 1745 else 1746 vput(nd.ni_dvp); 1747 vput(vp); 1748 } 1749 } 1750 if (dirp && v3) { 1751 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 1752 vrele(dirp); 1753 } 1754 nfsm_reply(NFSX_WCCDATA(v3)); 1755 if (v3) { 1756 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1757 return (0); 1758 } 1759 nfsm_srvdone; 1760 } 1761 1762 /* 1763 * nfs rename service 1764 */ 1765 int 1766 nfsrv_rename(nfsd, slp, procp, mrq) 1767 struct nfsrv_descript *nfsd; 1768 struct nfssvc_sock *slp; 1769 struct proc *procp; 1770 struct mbuf **mrq; 1771 { 1772 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1773 struct mbuf *nam = nfsd->nd_nam; 1774 caddr_t dpos = nfsd->nd_dpos; 1775 struct ucred *cred = &nfsd->nd_cr; 1776 u_int32_t *tl; 1777 int32_t t1; 1778 caddr_t bpos; 1779 int error = 0, cache, len, len2, fdirfor_ret = 1, fdiraft_ret = 1; 1780 int tdirfor_ret = 1, tdiraft_ret = 1; 1781 int v3 = (nfsd->nd_flag & ND_NFSV3); 1782 char *cp2; 1783 struct mbuf *mb, *mreq; 1784 struct nameidata fromnd, tond; 1785 struct vnode *fvp, *tvp, *tdvp, *fdirp = (struct vnode *)0; 1786 struct vnode *tdirp = (struct vnode *)0; 1787 struct vattr fdirfor, fdiraft, tdirfor, tdiraft; 1788 nfsfh_t fnfh, tnfh; 1789 fhandle_t *ffhp, *tfhp; 1790 u_quad_t frev; 1791 uid_t saved_uid; 1792 1793 #ifndef nolint 1794 fvp = (struct vnode *)0; 1795 #endif 1796 ffhp = &fnfh.fh_generic; 1797 tfhp = &tnfh.fh_generic; 1798 fromnd.ni_cnd.cn_nameiop = 0; 1799 tond.ni_cnd.cn_nameiop = 0; 1800 nfsm_srvmtofh(ffhp); 1801 nfsm_srvnamesiz(len); 1802 /* 1803 * Remember our original uid so that we can reset cr_uid before 1804 * the second nfs_namei() call, in case it is remapped. 1805 */ 1806 saved_uid = cred->cr_uid; 1807 fromnd.ni_cnd.cn_cred = cred; 1808 fromnd.ni_cnd.cn_nameiop = DELETE; 1809 fromnd.ni_cnd.cn_flags = WANTPARENT | SAVESTART; 1810 error = nfs_namei(&fromnd, ffhp, len, slp, nam, &md, 1811 &dpos, &fdirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1812 if (fdirp) { 1813 if (v3) 1814 fdirfor_ret = VOP_GETATTR(fdirp, &fdirfor, cred, 1815 procp); 1816 else { 1817 vrele(fdirp); 1818 fdirp = (struct vnode *)0; 1819 } 1820 } 1821 if (error) { 1822 nfsm_reply(2 * NFSX_WCCDATA(v3)); 1823 nfsm_srvwcc_data(fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft); 1824 nfsm_srvwcc_data(tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft); 1825 if (fdirp) 1826 vrele(fdirp); 1827 return (0); 1828 } 1829 fvp = fromnd.ni_vp; 1830 nfsm_srvmtofh(tfhp); 1831 nfsm_strsiz(len2, NFS_MAXNAMLEN); 1832 cred->cr_uid = saved_uid; 1833 tond.ni_cnd.cn_cred = cred; 1834 tond.ni_cnd.cn_nameiop = RENAME; 1835 tond.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF | NOCACHE | SAVESTART; 1836 error = nfs_namei(&tond, tfhp, len2, slp, nam, &md, 1837 &dpos, &tdirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1838 if (tdirp) { 1839 if (v3) 1840 tdirfor_ret = VOP_GETATTR(tdirp, &tdirfor, cred, 1841 procp); 1842 else { 1843 vrele(tdirp); 1844 tdirp = (struct vnode *)0; 1845 } 1846 } 1847 if (error) { 1848 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 1849 vrele(fromnd.ni_dvp); 1850 vrele(fvp); 1851 goto out1; 1852 } 1853 tdvp = tond.ni_dvp; 1854 tvp = tond.ni_vp; 1855 if (tvp != NULL) { 1856 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 1857 if (v3) 1858 error = EEXIST; 1859 else 1860 error = EISDIR; 1861 goto out; 1862 } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 1863 if (v3) 1864 error = EEXIST; 1865 else 1866 error = ENOTDIR; 1867 goto out; 1868 } 1869 if (tvp->v_type == VDIR && tvp->v_mountedhere) { 1870 if (v3) 1871 error = EXDEV; 1872 else 1873 error = ENOTEMPTY; 1874 goto out; 1875 } 1876 } 1877 if (fvp->v_type == VDIR && fvp->v_mountedhere) { 1878 if (v3) 1879 error = EXDEV; 1880 else 1881 error = ENOTEMPTY; 1882 goto out; 1883 } 1884 if (fvp->v_mount != tdvp->v_mount) { 1885 if (v3) 1886 error = EXDEV; 1887 else 1888 error = ENOTEMPTY; 1889 goto out; 1890 } 1891 if (fvp == tdvp) { 1892 if (v3) 1893 error = EINVAL; 1894 else 1895 error = ENOTEMPTY; 1896 } 1897 /* 1898 * If source is the same as the destination (that is the 1899 * same vnode with the same name in the same directory), 1900 * then there is nothing to do. 1901 */ 1902 if (fvp == tvp && fromnd.ni_dvp == tdvp && 1903 fromnd.ni_cnd.cn_namelen == tond.ni_cnd.cn_namelen && 1904 !memcmp(fromnd.ni_cnd.cn_nameptr, tond.ni_cnd.cn_nameptr, 1905 fromnd.ni_cnd.cn_namelen)) 1906 error = -1; 1907 out: 1908 if (!error) { 1909 nqsrv_getl(fromnd.ni_dvp, ND_WRITE); 1910 nqsrv_getl(tdvp, ND_WRITE); 1911 if (tvp) { 1912 (void)uvm_vnp_uncache(tvp); 1913 nqsrv_getl(tvp, ND_WRITE); 1914 } 1915 error = VOP_RENAME(fromnd.ni_dvp, fromnd.ni_vp, &fromnd.ni_cnd, 1916 tond.ni_dvp, tond.ni_vp, &tond.ni_cnd); 1917 } else { 1918 VOP_ABORTOP(tond.ni_dvp, &tond.ni_cnd); 1919 if (tdvp == tvp) 1920 vrele(tdvp); 1921 else 1922 vput(tdvp); 1923 if (tvp) 1924 vput(tvp); 1925 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 1926 vrele(fromnd.ni_dvp); 1927 vrele(fvp); 1928 if (error == -1) 1929 error = 0; 1930 } 1931 vrele(tond.ni_startdir); 1932 FREE(tond.ni_cnd.cn_pnbuf, M_NAMEI); 1933 out1: 1934 if (fdirp) { 1935 fdiraft_ret = VOP_GETATTR(fdirp, &fdiraft, cred, procp); 1936 vrele(fdirp); 1937 } 1938 if (tdirp) { 1939 tdiraft_ret = VOP_GETATTR(tdirp, &tdiraft, cred, procp); 1940 vrele(tdirp); 1941 } 1942 vrele(fromnd.ni_startdir); 1943 FREE(fromnd.ni_cnd.cn_pnbuf, M_NAMEI); 1944 nfsm_reply(2 * NFSX_WCCDATA(v3)); 1945 if (v3) { 1946 nfsm_srvwcc_data(fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft); 1947 nfsm_srvwcc_data(tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft); 1948 } 1949 return (0); 1950 1951 nfsmout: 1952 if (fdirp) 1953 vrele(fdirp); 1954 if (tdirp) 1955 vrele(tdirp); 1956 if (tond.ni_cnd.cn_nameiop) { 1957 vrele(tond.ni_startdir); 1958 FREE(tond.ni_cnd.cn_pnbuf, M_NAMEI); 1959 } 1960 if (fromnd.ni_cnd.cn_nameiop) { 1961 vrele(fromnd.ni_startdir); 1962 FREE(fromnd.ni_cnd.cn_pnbuf, M_NAMEI); 1963 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 1964 vrele(fromnd.ni_dvp); 1965 vrele(fvp); 1966 } 1967 return (error); 1968 } 1969 1970 /* 1971 * nfs link service 1972 */ 1973 int 1974 nfsrv_link(nfsd, slp, procp, mrq) 1975 struct nfsrv_descript *nfsd; 1976 struct nfssvc_sock *slp; 1977 struct proc *procp; 1978 struct mbuf **mrq; 1979 { 1980 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1981 struct mbuf *nam = nfsd->nd_nam; 1982 caddr_t dpos = nfsd->nd_dpos; 1983 struct ucred *cred = &nfsd->nd_cr; 1984 struct nameidata nd; 1985 u_int32_t *tl; 1986 int32_t t1; 1987 caddr_t bpos; 1988 int error = 0, rdonly, cache, len, dirfor_ret = 1, diraft_ret = 1; 1989 int getret = 1, v3 = (nfsd->nd_flag & ND_NFSV3); 1990 char *cp2; 1991 struct mbuf *mb, *mreq; 1992 struct vnode *vp, *xp, *dirp = (struct vnode *)0; 1993 struct vattr dirfor, diraft, at; 1994 nfsfh_t nfh, dnfh; 1995 fhandle_t *fhp, *dfhp; 1996 u_quad_t frev; 1997 1998 fhp = &nfh.fh_generic; 1999 dfhp = &dnfh.fh_generic; 2000 nfsm_srvmtofh(fhp); 2001 nfsm_srvmtofh(dfhp); 2002 nfsm_srvnamesiz(len); 2003 error = nfsrv_fhtovp(fhp, FALSE, &vp, cred, slp, nam, 2004 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2005 if (error) { 2006 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2007 nfsm_srvpostop_attr(getret, &at); 2008 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2009 return (0); 2010 } 2011 if (vp->v_type == VDIR && (error = suser(cred, (u_short *)0)) != 0) 2012 goto out1; 2013 nd.ni_cnd.cn_cred = cred; 2014 nd.ni_cnd.cn_nameiop = CREATE; 2015 nd.ni_cnd.cn_flags = LOCKPARENT; 2016 error = nfs_namei(&nd, dfhp, len, slp, nam, &md, &dpos, 2017 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2018 if (dirp) { 2019 if (v3) 2020 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 2021 procp); 2022 else { 2023 vrele(dirp); 2024 dirp = (struct vnode *)0; 2025 } 2026 } 2027 if (error) 2028 goto out1; 2029 xp = nd.ni_vp; 2030 if (xp != NULL) { 2031 error = EEXIST; 2032 goto out; 2033 } 2034 xp = nd.ni_dvp; 2035 if (vp->v_mount != xp->v_mount) 2036 error = EXDEV; 2037 out: 2038 if (!error) { 2039 nqsrv_getl(vp, ND_WRITE); 2040 nqsrv_getl(xp, ND_WRITE); 2041 error = VOP_LINK(nd.ni_dvp, vp, &nd.ni_cnd); 2042 } else { 2043 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2044 if (nd.ni_dvp == nd.ni_vp) 2045 vrele(nd.ni_dvp); 2046 else 2047 vput(nd.ni_dvp); 2048 if (nd.ni_vp) 2049 vrele(nd.ni_vp); 2050 } 2051 out1: 2052 if (v3) 2053 getret = VOP_GETATTR(vp, &at, cred, procp); 2054 if (dirp) { 2055 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 2056 vrele(dirp); 2057 } 2058 vrele(vp); 2059 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2060 if (v3) { 2061 nfsm_srvpostop_attr(getret, &at); 2062 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2063 return (0); 2064 } 2065 nfsm_srvdone; 2066 } 2067 2068 /* 2069 * nfs symbolic link service 2070 */ 2071 int 2072 nfsrv_symlink(nfsd, slp, procp, mrq) 2073 struct nfsrv_descript *nfsd; 2074 struct nfssvc_sock *slp; 2075 struct proc *procp; 2076 struct mbuf **mrq; 2077 { 2078 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2079 struct mbuf *nam = nfsd->nd_nam; 2080 caddr_t dpos = nfsd->nd_dpos; 2081 struct ucred *cred = &nfsd->nd_cr; 2082 struct vattr va, dirfor, diraft; 2083 struct nameidata nd; 2084 u_int32_t *tl; 2085 int32_t t1; 2086 struct nfsv2_sattr *sp; 2087 char *bpos, *pathcp = NULL, *cp2; 2088 struct uio io; 2089 struct iovec iv; 2090 int error = 0, cache, len, len2, dirfor_ret = 1, diraft_ret = 1; 2091 int v3 = (nfsd->nd_flag & ND_NFSV3); 2092 struct mbuf *mb, *mreq, *mb2; 2093 struct vnode *dirp = (struct vnode *)0; 2094 nfsfh_t nfh; 2095 fhandle_t *fhp; 2096 u_quad_t frev; 2097 2098 nd.ni_cnd.cn_nameiop = 0; 2099 fhp = &nfh.fh_generic; 2100 nfsm_srvmtofh(fhp); 2101 nfsm_srvnamesiz(len); 2102 nd.ni_cnd.cn_cred = cred; 2103 nd.ni_cnd.cn_nameiop = CREATE; 2104 nd.ni_cnd.cn_flags = LOCKPARENT | SAVESTART; 2105 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 2106 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2107 if (dirp) { 2108 if (v3) 2109 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 2110 procp); 2111 else { 2112 vrele(dirp); 2113 dirp = (struct vnode *)0; 2114 } 2115 } 2116 if (error) 2117 goto out; 2118 VATTR_NULL(&va); 2119 if (v3) 2120 nfsm_srvsattr(&va); 2121 nfsm_strsiz(len2, NFS_MAXPATHLEN); 2122 MALLOC(pathcp, caddr_t, len2 + 1, M_TEMP, M_WAITOK); 2123 iv.iov_base = pathcp; 2124 iv.iov_len = len2; 2125 io.uio_resid = len2; 2126 io.uio_offset = 0; 2127 io.uio_iov = &iv; 2128 io.uio_iovcnt = 1; 2129 io.uio_segflg = UIO_SYSSPACE; 2130 io.uio_rw = UIO_READ; 2131 io.uio_procp = (struct proc *)0; 2132 nfsm_mtouio(&io, len2); 2133 if (!v3) { 2134 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2135 va.va_mode = fxdr_unsigned(u_int16_t, sp->sa_mode); 2136 } 2137 *(pathcp + len2) = '\0'; 2138 if (nd.ni_vp) { 2139 vrele(nd.ni_startdir); 2140 free(nd.ni_cnd.cn_pnbuf, M_NAMEI); 2141 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2142 if (nd.ni_dvp == nd.ni_vp) 2143 vrele(nd.ni_dvp); 2144 else 2145 vput(nd.ni_dvp); 2146 vrele(nd.ni_vp); 2147 error = EEXIST; 2148 goto out; 2149 } 2150 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2151 error = VOP_SYMLINK(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va, pathcp); 2152 if (error) 2153 vrele(nd.ni_startdir); 2154 else { 2155 if (v3) { 2156 nd.ni_cnd.cn_nameiop = LOOKUP; 2157 nd.ni_cnd.cn_flags &= ~(LOCKPARENT | SAVESTART | FOLLOW); 2158 nd.ni_cnd.cn_flags |= (NOFOLLOW | LOCKLEAF); 2159 nd.ni_cnd.cn_proc = procp; 2160 nd.ni_cnd.cn_cred = cred; 2161 error = lookup(&nd); 2162 if (!error) { 2163 memset((caddr_t)fhp, 0, sizeof(nfh)); 2164 fhp->fh_fsid = nd.ni_vp->v_mount->mnt_stat.f_fsid; 2165 error = VFS_VPTOFH(nd.ni_vp, &fhp->fh_fid); 2166 if (!error) 2167 error = VOP_GETATTR(nd.ni_vp, &va, cred, 2168 procp); 2169 vput(nd.ni_vp); 2170 } 2171 } else 2172 vrele(nd.ni_startdir); 2173 FREE(nd.ni_cnd.cn_pnbuf, M_NAMEI); 2174 } 2175 out: 2176 if (pathcp) 2177 FREE(pathcp, M_TEMP); 2178 if (dirp) { 2179 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 2180 vrele(dirp); 2181 } 2182 nfsm_reply(NFSX_SRVFH(v3) + NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2183 if (v3) { 2184 if (!error) { 2185 nfsm_srvpostop_fh(fhp); 2186 nfsm_srvpostop_attr(0, &va); 2187 } 2188 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2189 } 2190 return (0); 2191 nfsmout: 2192 if (nd.ni_cnd.cn_nameiop) { 2193 vrele(nd.ni_startdir); 2194 free(nd.ni_cnd.cn_pnbuf, M_NAMEI); 2195 } 2196 if (dirp) 2197 vrele(dirp); 2198 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2199 if (nd.ni_dvp == nd.ni_vp) 2200 vrele(nd.ni_dvp); 2201 else 2202 vput(nd.ni_dvp); 2203 if (nd.ni_vp) 2204 vrele(nd.ni_vp); 2205 if (pathcp) 2206 FREE(pathcp, M_TEMP); 2207 return (error); 2208 } 2209 2210 /* 2211 * nfs mkdir service 2212 */ 2213 int 2214 nfsrv_mkdir(nfsd, slp, procp, mrq) 2215 struct nfsrv_descript *nfsd; 2216 struct nfssvc_sock *slp; 2217 struct proc *procp; 2218 struct mbuf **mrq; 2219 { 2220 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2221 struct mbuf *nam = nfsd->nd_nam; 2222 caddr_t dpos = nfsd->nd_dpos; 2223 struct ucred *cred = &nfsd->nd_cr; 2224 struct vattr va, dirfor, diraft; 2225 struct nfs_fattr *fp; 2226 struct nameidata nd; 2227 caddr_t cp; 2228 u_int32_t *tl; 2229 int32_t t1; 2230 caddr_t bpos; 2231 int error = 0, cache, len, dirfor_ret = 1, diraft_ret = 1; 2232 int v3 = (nfsd->nd_flag & ND_NFSV3); 2233 char *cp2; 2234 struct mbuf *mb, *mb2, *mreq; 2235 struct vnode *vp, *dirp = (struct vnode *)0; 2236 nfsfh_t nfh; 2237 fhandle_t *fhp; 2238 u_quad_t frev; 2239 2240 fhp = &nfh.fh_generic; 2241 nfsm_srvmtofh(fhp); 2242 nfsm_srvnamesiz(len); 2243 nd.ni_cnd.cn_cred = cred; 2244 nd.ni_cnd.cn_nameiop = CREATE; 2245 nd.ni_cnd.cn_flags = LOCKPARENT; 2246 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 2247 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2248 if (dirp) { 2249 if (v3) 2250 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 2251 procp); 2252 else { 2253 vrele(dirp); 2254 dirp = (struct vnode *)0; 2255 } 2256 } 2257 if (error) { 2258 nfsm_reply(NFSX_WCCDATA(v3)); 2259 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2260 if (dirp) 2261 vrele(dirp); 2262 return (0); 2263 } 2264 VATTR_NULL(&va); 2265 if (v3) { 2266 nfsm_srvsattr(&va); 2267 } else { 2268 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2269 va.va_mode = nfstov_mode(*tl++); 2270 } 2271 va.va_type = VDIR; 2272 vp = nd.ni_vp; 2273 if (vp != NULL) { 2274 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2275 if (nd.ni_dvp == vp) 2276 vrele(nd.ni_dvp); 2277 else 2278 vput(nd.ni_dvp); 2279 vrele(vp); 2280 error = EEXIST; 2281 goto out; 2282 } 2283 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2284 error = VOP_MKDIR(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 2285 if (!error) { 2286 vp = nd.ni_vp; 2287 memset((caddr_t)fhp, 0, sizeof(nfh)); 2288 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; 2289 error = VFS_VPTOFH(vp, &fhp->fh_fid); 2290 if (!error) 2291 error = VOP_GETATTR(vp, &va, cred, procp); 2292 vput(vp); 2293 } 2294 out: 2295 if (dirp) { 2296 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 2297 vrele(dirp); 2298 } 2299 nfsm_reply(NFSX_SRVFH(v3) + NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2300 if (v3) { 2301 if (!error) { 2302 nfsm_srvpostop_fh(fhp); 2303 nfsm_srvpostop_attr(0, &va); 2304 } 2305 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2306 } else { 2307 nfsm_srvfhtom(fhp, v3); 2308 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 2309 nfsm_srvfillattr(&va, fp); 2310 } 2311 return (0); 2312 nfsmout: 2313 if (dirp) 2314 vrele(dirp); 2315 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2316 if (nd.ni_dvp == nd.ni_vp) 2317 vrele(nd.ni_dvp); 2318 else 2319 vput(nd.ni_dvp); 2320 if (nd.ni_vp) 2321 vrele(nd.ni_vp); 2322 return (error); 2323 } 2324 2325 /* 2326 * nfs rmdir service 2327 */ 2328 int 2329 nfsrv_rmdir(nfsd, slp, procp, mrq) 2330 struct nfsrv_descript *nfsd; 2331 struct nfssvc_sock *slp; 2332 struct proc *procp; 2333 struct mbuf **mrq; 2334 { 2335 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2336 struct mbuf *nam = nfsd->nd_nam; 2337 caddr_t dpos = nfsd->nd_dpos; 2338 struct ucred *cred = &nfsd->nd_cr; 2339 u_int32_t *tl; 2340 int32_t t1; 2341 caddr_t bpos; 2342 int error = 0, cache, len, dirfor_ret = 1, diraft_ret = 1; 2343 int v3 = (nfsd->nd_flag & ND_NFSV3); 2344 char *cp2; 2345 struct mbuf *mb, *mreq; 2346 struct vnode *vp, *dirp = (struct vnode *)0; 2347 struct vattr dirfor, diraft; 2348 nfsfh_t nfh; 2349 fhandle_t *fhp; 2350 struct nameidata nd; 2351 u_quad_t frev; 2352 2353 fhp = &nfh.fh_generic; 2354 nfsm_srvmtofh(fhp); 2355 nfsm_srvnamesiz(len); 2356 nd.ni_cnd.cn_cred = cred; 2357 nd.ni_cnd.cn_nameiop = DELETE; 2358 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 2359 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 2360 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2361 if (dirp) { 2362 if (v3) 2363 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 2364 procp); 2365 else { 2366 vrele(dirp); 2367 dirp = (struct vnode *)0; 2368 } 2369 } 2370 if (error) { 2371 nfsm_reply(NFSX_WCCDATA(v3)); 2372 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2373 if (dirp) 2374 vrele(dirp); 2375 return (0); 2376 } 2377 vp = nd.ni_vp; 2378 if (vp->v_type != VDIR) { 2379 error = ENOTDIR; 2380 goto out; 2381 } 2382 /* 2383 * No rmdir "." please. 2384 */ 2385 if (nd.ni_dvp == vp) { 2386 error = EINVAL; 2387 goto out; 2388 } 2389 /* 2390 * The root of a mounted filesystem cannot be deleted. 2391 */ 2392 if (vp->v_flag & VROOT) 2393 error = EBUSY; 2394 out: 2395 if (!error) { 2396 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2397 nqsrv_getl(vp, ND_WRITE); 2398 error = VOP_RMDIR(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); 2399 } else { 2400 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2401 if (nd.ni_dvp == nd.ni_vp) 2402 vrele(nd.ni_dvp); 2403 else 2404 vput(nd.ni_dvp); 2405 vput(vp); 2406 } 2407 if (dirp) { 2408 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 2409 vrele(dirp); 2410 } 2411 nfsm_reply(NFSX_WCCDATA(v3)); 2412 if (v3) { 2413 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2414 return (0); 2415 } 2416 nfsm_srvdone; 2417 } 2418 2419 /* 2420 * nfs readdir service 2421 * - mallocs what it thinks is enough to read 2422 * count rounded up to a multiple of NFS_DIRBLKSIZ <= NFS_MAXREADDIR 2423 * - calls VOP_READDIR() 2424 * - loops around building the reply 2425 * if the output generated exceeds count break out of loop 2426 * The nfsm_clget macro is used here so that the reply will be packed 2427 * tightly in mbuf clusters. 2428 * - it only knows that it has encountered eof when the VOP_READDIR() 2429 * reads nothing 2430 * - as such one readdir rpc will return eof false although you are there 2431 * and then the next will return eof 2432 * - it trims out records with d_fileno == 0 2433 * this doesn't matter for Unix clients, but they might confuse clients 2434 * for other os'. 2435 * - it trims out records with d_type == DT_WHT 2436 * these cannot be seen through NFS (unless we extend the protocol) 2437 * NB: It is tempting to set eof to true if the VOP_READDIR() reads less 2438 * than requested, but this may not apply to all filesystems. For 2439 * example, client NFS does not { although it is never remote mounted 2440 * anyhow } 2441 * The alternate call nfsrv_readdirplus() does lookups as well. 2442 * PS: The NFS protocol spec. does not clarify what the "count" byte 2443 * argument is a count of.. just name strings and file id's or the 2444 * entire reply rpc or ... 2445 * I tried just file name and id sizes and it confused the Sun client, 2446 * so I am using the full rpc size now. The "paranoia.." comment refers 2447 * to including the status longwords that are not a part of the dir. 2448 * "entry" structures, but are in the rpc. 2449 */ 2450 struct flrep { 2451 nfsuint64 fl_off; 2452 u_int32_t fl_postopok; 2453 u_int32_t fl_fattr[NFSX_V3FATTR / sizeof (u_int32_t)]; 2454 u_int32_t fl_fhok; 2455 u_int32_t fl_fhsize; 2456 u_int32_t fl_nfh[NFSX_V3FH / sizeof (u_int32_t)]; 2457 }; 2458 2459 int 2460 nfsrv_readdir(nfsd, slp, procp, mrq) 2461 struct nfsrv_descript *nfsd; 2462 struct nfssvc_sock *slp; 2463 struct proc *procp; 2464 struct mbuf **mrq; 2465 { 2466 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2467 struct mbuf *nam = nfsd->nd_nam; 2468 caddr_t dpos = nfsd->nd_dpos; 2469 struct ucred *cred = &nfsd->nd_cr; 2470 char *bp, *be; 2471 struct mbuf *mp; 2472 struct dirent *dp; 2473 caddr_t cp; 2474 u_int32_t *tl; 2475 int32_t t1; 2476 caddr_t bpos; 2477 struct mbuf *mb, *mb2, *mreq, *mp2; 2478 char *cpos, *cend, *cp2, *rbuf; 2479 struct vnode *vp; 2480 struct vattr at; 2481 nfsfh_t nfh; 2482 fhandle_t *fhp; 2483 struct uio io; 2484 struct iovec iv; 2485 int len, nlen, rem, xfer, tsiz, i, error = 0, getret = 1; 2486 int siz, cnt, fullsiz, eofflag, rdonly, cache, ncookies; 2487 int v3 = (nfsd->nd_flag & ND_NFSV3); 2488 u_quad_t frev, off, toff, verf; 2489 off_t *cookies = NULL, *cookiep; 2490 nfsuint64 jar; 2491 2492 fhp = &nfh.fh_generic; 2493 nfsm_srvmtofh(fhp); 2494 if (v3) { 2495 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 2496 toff = fxdr_hyper(tl); 2497 tl += 2; 2498 verf = fxdr_hyper(tl); 2499 tl += 2; 2500 } else { 2501 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2502 toff = fxdr_unsigned(u_quad_t, *tl++); 2503 } 2504 off = toff; 2505 cnt = fxdr_unsigned(int, *tl); 2506 siz = ((cnt + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1)); 2507 xfer = NFS_SRVMAXDATA(nfsd); 2508 if (siz > xfer) 2509 siz = xfer; 2510 fullsiz = siz; 2511 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 2512 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2513 if (!error && vp->v_type != VDIR) { 2514 error = ENOTDIR; 2515 vput(vp); 2516 } 2517 if (error) { 2518 nfsm_reply(NFSX_UNSIGNED); 2519 nfsm_srvpostop_attr(getret, &at); 2520 return (0); 2521 } 2522 nqsrv_getl(vp, ND_READ); 2523 if (v3) { 2524 error = getret = VOP_GETATTR(vp, &at, cred, procp); 2525 #ifdef NFS3_STRICTVERF 2526 /* 2527 * XXX This check is too strict for Solaris 2.5 clients. 2528 */ 2529 if (!error && toff && verf != at.va_filerev) 2530 error = NFSERR_BAD_COOKIE; 2531 #endif 2532 } 2533 if (!error) 2534 error = nfsrv_access(vp, VEXEC, cred, rdonly, procp, 0); 2535 if (error) { 2536 vput(vp); 2537 nfsm_reply(NFSX_POSTOPATTR(v3)); 2538 nfsm_srvpostop_attr(getret, &at); 2539 return (0); 2540 } 2541 VOP_UNLOCK(vp, 0); 2542 MALLOC(rbuf, caddr_t, siz, M_TEMP, M_WAITOK); 2543 again: 2544 iv.iov_base = rbuf; 2545 iv.iov_len = fullsiz; 2546 io.uio_iov = &iv; 2547 io.uio_iovcnt = 1; 2548 io.uio_offset = (off_t)off; 2549 io.uio_resid = fullsiz; 2550 io.uio_segflg = UIO_SYSSPACE; 2551 io.uio_rw = UIO_READ; 2552 io.uio_procp = (struct proc *)0; 2553 eofflag = 0; 2554 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2555 2556 error = VOP_READDIR(vp, &io, cred, &eofflag, &cookies, &ncookies); 2557 2558 off = (off_t)io.uio_offset; 2559 if (!cookies && !error) 2560 error = NFSERR_PERM; 2561 if (v3) { 2562 getret = VOP_GETATTR(vp, &at, cred, procp); 2563 if (!error) 2564 error = getret; 2565 } 2566 2567 VOP_UNLOCK(vp, 0); 2568 if (error) { 2569 vrele(vp); 2570 FREE((caddr_t)rbuf, M_TEMP); 2571 if (cookies) 2572 free((caddr_t)cookies, M_TEMP); 2573 nfsm_reply(NFSX_POSTOPATTR(v3)); 2574 nfsm_srvpostop_attr(getret, &at); 2575 return (0); 2576 } 2577 if (io.uio_resid) { 2578 siz -= io.uio_resid; 2579 2580 /* 2581 * If nothing read, return eof 2582 * rpc reply 2583 */ 2584 if (siz == 0) { 2585 vrele(vp); 2586 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_COOKIEVERF(v3) + 2587 2 * NFSX_UNSIGNED); 2588 if (v3) { 2589 nfsm_srvpostop_attr(getret, &at); 2590 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 2591 txdr_hyper(at.va_filerev, tl); 2592 tl += 2; 2593 } else 2594 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2595 *tl++ = nfs_false; 2596 *tl = nfs_true; 2597 FREE((caddr_t)rbuf, M_TEMP); 2598 FREE((caddr_t)cookies, M_TEMP); 2599 return (0); 2600 } 2601 } 2602 2603 /* 2604 * Check for degenerate cases of nothing useful read. 2605 * If so go try again 2606 */ 2607 cpos = rbuf; 2608 cend = rbuf + siz; 2609 dp = (struct dirent *)cpos; 2610 cookiep = cookies; 2611 2612 while (cpos < cend && ncookies > 0 && 2613 (dp->d_fileno == 0 || dp->d_type == DT_WHT)) { 2614 cpos += dp->d_reclen; 2615 dp = (struct dirent *)cpos; 2616 cookiep++; 2617 ncookies--; 2618 } 2619 if (cpos >= cend || ncookies == 0) { 2620 toff = off; 2621 siz = fullsiz; 2622 goto again; 2623 } 2624 2625 len = 3 * NFSX_UNSIGNED; /* paranoia, probably can be 0 */ 2626 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_COOKIEVERF(v3) + siz); 2627 if (v3) { 2628 nfsm_srvpostop_attr(getret, &at); 2629 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2630 txdr_hyper(at.va_filerev, tl); 2631 } 2632 mp = mp2 = mb; 2633 bp = bpos; 2634 be = bp + M_TRAILINGSPACE(mp); 2635 2636 /* Loop through the records and build reply */ 2637 while (cpos < cend && ncookies > 0) { 2638 if (dp->d_fileno != 0 && dp->d_type != DT_WHT) { 2639 nlen = dp->d_namlen; 2640 rem = nfsm_rndup(nlen)-nlen; 2641 len += (4 * NFSX_UNSIGNED + nlen + rem); 2642 if (v3) 2643 len += 2 * NFSX_UNSIGNED; 2644 if (len > cnt) { 2645 eofflag = 0; 2646 break; 2647 } 2648 /* 2649 * Build the directory record xdr from 2650 * the dirent entry. 2651 */ 2652 nfsm_clget; 2653 *tl = nfs_true; 2654 bp += NFSX_UNSIGNED; 2655 if (v3) { 2656 nfsm_clget; 2657 *tl = 0; 2658 bp += NFSX_UNSIGNED; 2659 } 2660 nfsm_clget; 2661 *tl = txdr_unsigned(dp->d_fileno); 2662 bp += NFSX_UNSIGNED; 2663 nfsm_clget; 2664 *tl = txdr_unsigned(nlen); 2665 bp += NFSX_UNSIGNED; 2666 2667 /* And loop around copying the name */ 2668 xfer = nlen; 2669 cp = dp->d_name; 2670 while (xfer > 0) { 2671 nfsm_clget; 2672 if ((bp+xfer) > be) 2673 tsiz = be-bp; 2674 else 2675 tsiz = xfer; 2676 memcpy(bp, cp, tsiz); 2677 bp += tsiz; 2678 xfer -= tsiz; 2679 if (xfer > 0) 2680 cp += tsiz; 2681 } 2682 /* And null pad to an int32_t boundary */ 2683 for (i = 0; i < rem; i++) 2684 *bp++ = '\0'; 2685 nfsm_clget; 2686 2687 /* Finish off the record */ 2688 txdr_hyper(*cookiep, &jar); 2689 if (v3) { 2690 *tl = jar.nfsuquad[0]; 2691 bp += NFSX_UNSIGNED; 2692 nfsm_clget; 2693 } 2694 *tl = jar.nfsuquad[1]; 2695 bp += NFSX_UNSIGNED; 2696 } 2697 cpos += dp->d_reclen; 2698 dp = (struct dirent *)cpos; 2699 cookiep++; 2700 ncookies--; 2701 } 2702 vrele(vp); 2703 nfsm_clget; 2704 *tl = nfs_false; 2705 bp += NFSX_UNSIGNED; 2706 nfsm_clget; 2707 if (eofflag) 2708 *tl = nfs_true; 2709 else 2710 *tl = nfs_false; 2711 bp += NFSX_UNSIGNED; 2712 if (mp != mb) { 2713 if (bp < be) 2714 mp->m_len = bp - mtod(mp, caddr_t); 2715 } else 2716 mp->m_len += bp - bpos; 2717 FREE((caddr_t)rbuf, M_TEMP); 2718 FREE((caddr_t)cookies, M_TEMP); 2719 nfsm_srvdone; 2720 } 2721 2722 int 2723 nfsrv_readdirplus(nfsd, slp, procp, mrq) 2724 struct nfsrv_descript *nfsd; 2725 struct nfssvc_sock *slp; 2726 struct proc *procp; 2727 struct mbuf **mrq; 2728 { 2729 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2730 struct mbuf *nam = nfsd->nd_nam; 2731 caddr_t dpos = nfsd->nd_dpos; 2732 struct ucred *cred = &nfsd->nd_cr; 2733 char *bp, *be; 2734 struct mbuf *mp; 2735 struct dirent *dp; 2736 caddr_t cp; 2737 u_int32_t *tl; 2738 int32_t t1; 2739 caddr_t bpos; 2740 struct mbuf *mb, *mb2, *mreq, *mp2; 2741 char *cpos, *cend, *cp2, *rbuf; 2742 struct vnode *vp, *nvp; 2743 struct flrep fl; 2744 nfsfh_t nfh; 2745 fhandle_t *fhp, *nfhp = (fhandle_t *)fl.fl_nfh; 2746 struct uio io; 2747 struct iovec iv; 2748 struct vattr va, at, *vap = &va; 2749 struct nfs_fattr *fp; 2750 int len, nlen, rem, xfer, tsiz, i, error = 0, getret = 1; 2751 int siz, cnt, fullsiz, eofflag, rdonly, cache, dirlen, ncookies; 2752 u_quad_t frev, off, toff, verf; 2753 off_t *cookies = NULL, *cookiep; 2754 2755 fhp = &nfh.fh_generic; 2756 nfsm_srvmtofh(fhp); 2757 nfsm_dissect(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 2758 toff = fxdr_hyper(tl); 2759 tl += 2; 2760 verf = fxdr_hyper(tl); 2761 tl += 2; 2762 siz = fxdr_unsigned(int, *tl++); 2763 cnt = fxdr_unsigned(int, *tl); 2764 off = toff; 2765 siz = ((siz + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1)); 2766 xfer = NFS_SRVMAXDATA(nfsd); 2767 if (siz > xfer) 2768 siz = xfer; 2769 fullsiz = siz; 2770 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 2771 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2772 if (!error && vp->v_type != VDIR) { 2773 error = ENOTDIR; 2774 vput(vp); 2775 } 2776 if (error) { 2777 nfsm_reply(NFSX_UNSIGNED); 2778 nfsm_srvpostop_attr(getret, &at); 2779 return (0); 2780 } 2781 error = getret = VOP_GETATTR(vp, &at, cred, procp); 2782 #ifdef NFS3_STRICTVERF 2783 /* 2784 * XXX This check is too strict for Solaris 2.5 clients. 2785 */ 2786 if (!error && toff && verf != at.va_filerev) 2787 error = NFSERR_BAD_COOKIE; 2788 #endif 2789 if (!error) { 2790 nqsrv_getl(vp, ND_READ); 2791 error = nfsrv_access(vp, VEXEC, cred, rdonly, procp, 0); 2792 } 2793 if (error) { 2794 vput(vp); 2795 nfsm_reply(NFSX_V3POSTOPATTR); 2796 nfsm_srvpostop_attr(getret, &at); 2797 return (0); 2798 } 2799 VOP_UNLOCK(vp, 0); 2800 2801 MALLOC(rbuf, caddr_t, siz, M_TEMP, M_WAITOK); 2802 again: 2803 iv.iov_base = rbuf; 2804 iv.iov_len = fullsiz; 2805 io.uio_iov = &iv; 2806 io.uio_iovcnt = 1; 2807 io.uio_offset = (off_t)off; 2808 io.uio_resid = fullsiz; 2809 io.uio_segflg = UIO_SYSSPACE; 2810 io.uio_rw = UIO_READ; 2811 io.uio_procp = (struct proc *)0; 2812 eofflag = 0; 2813 2814 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2815 2816 error = VOP_READDIR(vp, &io, cred, &eofflag, &cookies, &ncookies); 2817 2818 off = (u_quad_t)io.uio_offset; 2819 getret = VOP_GETATTR(vp, &at, cred, procp); 2820 2821 VOP_UNLOCK(vp, 0); 2822 2823 /* 2824 * If the VGET operation doesn't work for this filesystem, 2825 * we can't support readdirplus. Returning NOTSUPP should 2826 * make clients fall back to plain readdir. 2827 * There's no need to check for VPTOFH as well, we wouldn't 2828 * even be here otherwise. 2829 */ 2830 if (!getret) { 2831 if ((getret = VFS_VGET(vp->v_mount, at.va_fileid, &nvp))) 2832 getret = (getret == EOPNOTSUPP) ? 2833 NFSERR_NOTSUPP : NFSERR_IO; 2834 else 2835 vput(nvp); 2836 } 2837 2838 if (!cookies && !error) 2839 error = NFSERR_PERM; 2840 if (!error) 2841 error = getret; 2842 if (error) { 2843 vrele(vp); 2844 if (cookies) 2845 FREE((caddr_t)cookies, M_TEMP); 2846 FREE((caddr_t)rbuf, M_TEMP); 2847 nfsm_reply(NFSX_V3POSTOPATTR); 2848 nfsm_srvpostop_attr(getret, &at); 2849 return (0); 2850 } 2851 if (io.uio_resid) { 2852 siz -= io.uio_resid; 2853 2854 /* 2855 * If nothing read, return eof 2856 * rpc reply 2857 */ 2858 if (siz == 0) { 2859 vrele(vp); 2860 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF + 2861 2 * NFSX_UNSIGNED); 2862 nfsm_srvpostop_attr(getret, &at); 2863 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 2864 txdr_hyper(at.va_filerev, tl); 2865 tl += 2; 2866 *tl++ = nfs_false; 2867 *tl = nfs_true; 2868 FREE((caddr_t)cookies, M_TEMP); 2869 FREE((caddr_t)rbuf, M_TEMP); 2870 return (0); 2871 } 2872 } 2873 2874 /* 2875 * Check for degenerate cases of nothing useful read. 2876 * If so go try again 2877 */ 2878 cpos = rbuf; 2879 cend = rbuf + siz; 2880 dp = (struct dirent *)cpos; 2881 cookiep = cookies; 2882 2883 while (cpos < cend && ncookies > 0 && 2884 (dp->d_fileno == 0 || dp->d_type == DT_WHT)) { 2885 cpos += dp->d_reclen; 2886 dp = (struct dirent *)cpos; 2887 cookiep++; 2888 ncookies--; 2889 } 2890 if (cpos >= cend || ncookies == 0) { 2891 toff = off; 2892 siz = fullsiz; 2893 goto again; 2894 } 2895 2896 dirlen = len = NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF + 2 * NFSX_UNSIGNED; 2897 nfsm_reply(cnt); 2898 nfsm_srvpostop_attr(getret, &at); 2899 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2900 txdr_hyper(at.va_filerev, tl); 2901 mp = mp2 = mb; 2902 bp = bpos; 2903 be = bp + M_TRAILINGSPACE(mp); 2904 2905 /* Loop through the records and build reply */ 2906 while (cpos < cend && ncookies > 0) { 2907 if (dp->d_fileno != 0 && dp->d_type != DT_WHT) { 2908 nlen = dp->d_namlen; 2909 rem = nfsm_rndup(nlen)-nlen; 2910 2911 /* 2912 * For readdir_and_lookup get the vnode using 2913 * the file number. 2914 */ 2915 if (VFS_VGET(vp->v_mount, dp->d_fileno, &nvp)) 2916 goto invalid; 2917 memset((caddr_t)nfhp, 0, NFSX_V3FH); 2918 nfhp->fh_fsid = 2919 nvp->v_mount->mnt_stat.f_fsid; 2920 if (VFS_VPTOFH(nvp, &nfhp->fh_fid)) { 2921 vput(nvp); 2922 goto invalid; 2923 } 2924 if (VOP_GETATTR(nvp, vap, cred, procp)) { 2925 vput(nvp); 2926 goto invalid; 2927 } 2928 vput(nvp); 2929 2930 /* 2931 * If either the dircount or maxcount will be 2932 * exceeded, get out now. Both of these lengths 2933 * are calculated conservatively, including all 2934 * XDR overheads. 2935 */ 2936 len += (8 * NFSX_UNSIGNED + nlen + rem + NFSX_V3FH + 2937 NFSX_V3POSTOPATTR); 2938 dirlen += (6 * NFSX_UNSIGNED + nlen + rem); 2939 if (len > cnt || dirlen > fullsiz) { 2940 eofflag = 0; 2941 break; 2942 } 2943 2944 /* 2945 * Build the directory record xdr from 2946 * the dirent entry. 2947 */ 2948 fp = (struct nfs_fattr *)&fl.fl_fattr; 2949 nfsm_srvfillattr(vap, fp); 2950 fl.fl_fhsize = txdr_unsigned(NFSX_V3FH); 2951 fl.fl_fhok = nfs_true; 2952 fl.fl_postopok = nfs_true; 2953 txdr_hyper(*cookiep, fl.fl_off.nfsuquad); 2954 2955 nfsm_clget; 2956 *tl = nfs_true; 2957 bp += NFSX_UNSIGNED; 2958 nfsm_clget; 2959 *tl = 0; 2960 bp += NFSX_UNSIGNED; 2961 nfsm_clget; 2962 *tl = txdr_unsigned(dp->d_fileno); 2963 bp += NFSX_UNSIGNED; 2964 nfsm_clget; 2965 *tl = txdr_unsigned(nlen); 2966 bp += NFSX_UNSIGNED; 2967 2968 /* And loop around copying the name */ 2969 xfer = nlen; 2970 cp = dp->d_name; 2971 while (xfer > 0) { 2972 nfsm_clget; 2973 if ((bp + xfer) > be) 2974 tsiz = be - bp; 2975 else 2976 tsiz = xfer; 2977 memcpy(bp, cp, tsiz); 2978 bp += tsiz; 2979 xfer -= tsiz; 2980 if (xfer > 0) 2981 cp += tsiz; 2982 } 2983 /* And null pad to an int32_t boundary */ 2984 for (i = 0; i < rem; i++) 2985 *bp++ = '\0'; 2986 2987 /* 2988 * Now copy the flrep structure out. 2989 */ 2990 xfer = sizeof (struct flrep); 2991 cp = (caddr_t)&fl; 2992 while (xfer > 0) { 2993 nfsm_clget; 2994 if ((bp + xfer) > be) 2995 tsiz = be - bp; 2996 else 2997 tsiz = xfer; 2998 memcpy(bp, cp, tsiz); 2999 bp += tsiz; 3000 xfer -= tsiz; 3001 if (xfer > 0) 3002 cp += tsiz; 3003 } 3004 } 3005 invalid: 3006 cpos += dp->d_reclen; 3007 dp = (struct dirent *)cpos; 3008 cookiep++; 3009 ncookies--; 3010 } 3011 vrele(vp); 3012 nfsm_clget; 3013 *tl = nfs_false; 3014 bp += NFSX_UNSIGNED; 3015 nfsm_clget; 3016 if (eofflag) 3017 *tl = nfs_true; 3018 else 3019 *tl = nfs_false; 3020 bp += NFSX_UNSIGNED; 3021 if (mp != mb) { 3022 if (bp < be) 3023 mp->m_len = bp - mtod(mp, caddr_t); 3024 } else 3025 mp->m_len += bp - bpos; 3026 FREE((caddr_t)cookies, M_TEMP); 3027 FREE((caddr_t)rbuf, M_TEMP); 3028 nfsm_srvdone; 3029 } 3030 3031 /* 3032 * nfs commit service 3033 */ 3034 int 3035 nfsrv_commit(nfsd, slp, procp, mrq) 3036 struct nfsrv_descript *nfsd; 3037 struct nfssvc_sock *slp; 3038 struct proc *procp; 3039 struct mbuf **mrq; 3040 { 3041 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3042 struct mbuf *nam = nfsd->nd_nam; 3043 caddr_t dpos = nfsd->nd_dpos; 3044 struct ucred *cred = &nfsd->nd_cr; 3045 struct vattr bfor, aft; 3046 struct vnode *vp; 3047 nfsfh_t nfh; 3048 fhandle_t *fhp; 3049 u_int32_t *tl; 3050 int32_t t1; 3051 caddr_t bpos; 3052 int error = 0, rdonly, for_ret = 1, aft_ret = 1, cnt, cache; 3053 char *cp2; 3054 struct mbuf *mb, *mb2, *mreq; 3055 u_quad_t frev, off; 3056 3057 #ifndef nolint 3058 cache = 0; 3059 #endif 3060 fhp = &nfh.fh_generic; 3061 nfsm_srvmtofh(fhp); 3062 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 3063 3064 /* 3065 * XXX At this time VOP_FSYNC() does not accept offset and byte 3066 * count parameters, so these arguments are useless (someday maybe). 3067 */ 3068 off = fxdr_hyper(tl); 3069 tl += 2; 3070 cnt = fxdr_unsigned(int, *tl); 3071 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 3072 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 3073 if (error) { 3074 nfsm_reply(2 * NFSX_UNSIGNED); 3075 nfsm_srvwcc_data(for_ret, &bfor, aft_ret, &aft); 3076 return (0); 3077 } 3078 for_ret = VOP_GETATTR(vp, &bfor, cred, procp); 3079 error = VOP_FSYNC(vp, cred, FSYNC_WAIT, procp); 3080 aft_ret = VOP_GETATTR(vp, &aft, cred, procp); 3081 vput(vp); 3082 nfsm_reply(NFSX_V3WCCDATA + NFSX_V3WRITEVERF); 3083 nfsm_srvwcc_data(for_ret, &bfor, aft_ret, &aft); 3084 if (!error) { 3085 nfsm_build(tl, u_int32_t *, NFSX_V3WRITEVERF); 3086 *tl++ = txdr_unsigned(boottime.tv_sec); 3087 *tl = txdr_unsigned(boottime.tv_usec); 3088 } else 3089 return (0); 3090 nfsm_srvdone; 3091 } 3092 3093 /* 3094 * nfs statfs service 3095 */ 3096 int 3097 nfsrv_statfs(nfsd, slp, procp, mrq) 3098 struct nfsrv_descript *nfsd; 3099 struct nfssvc_sock *slp; 3100 struct proc *procp; 3101 struct mbuf **mrq; 3102 { 3103 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3104 struct mbuf *nam = nfsd->nd_nam; 3105 caddr_t dpos = nfsd->nd_dpos; 3106 struct ucred *cred = &nfsd->nd_cr; 3107 struct statfs *sf; 3108 struct nfs_statfs *sfp; 3109 u_int32_t *tl; 3110 int32_t t1; 3111 caddr_t bpos; 3112 int error = 0, rdonly, cache, getret = 1; 3113 int v3 = (nfsd->nd_flag & ND_NFSV3); 3114 char *cp2; 3115 struct mbuf *mb, *mb2, *mreq; 3116 struct vnode *vp; 3117 struct vattr at; 3118 nfsfh_t nfh; 3119 fhandle_t *fhp; 3120 struct statfs statfs; 3121 u_quad_t frev, tval; 3122 3123 #ifndef nolint 3124 cache = 0; 3125 #endif 3126 fhp = &nfh.fh_generic; 3127 nfsm_srvmtofh(fhp); 3128 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 3129 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 3130 if (error) { 3131 nfsm_reply(NFSX_UNSIGNED); 3132 nfsm_srvpostop_attr(getret, &at); 3133 return (0); 3134 } 3135 sf = &statfs; 3136 error = VFS_STATFS(vp->v_mount, sf, procp); 3137 getret = VOP_GETATTR(vp, &at, cred, procp); 3138 vput(vp); 3139 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_STATFS(v3)); 3140 if (v3) 3141 nfsm_srvpostop_attr(getret, &at); 3142 if (error) 3143 return (0); 3144 nfsm_build(sfp, struct nfs_statfs *, NFSX_STATFS(v3)); 3145 if (v3) { 3146 tval = (u_quad_t)((quad_t)sf->f_blocks * (quad_t)sf->f_bsize); 3147 txdr_hyper(tval, &sfp->sf_tbytes); 3148 tval = (u_quad_t)((quad_t)sf->f_bfree * (quad_t)sf->f_bsize); 3149 txdr_hyper(tval, &sfp->sf_fbytes); 3150 tval = (u_quad_t)((quad_t)sf->f_bavail * (quad_t)sf->f_bsize); 3151 txdr_hyper(tval, &sfp->sf_abytes); 3152 tval = (u_quad_t)sf->f_files; 3153 txdr_hyper(tval, &sfp->sf_tfiles); 3154 tval = (u_quad_t)sf->f_ffree; 3155 txdr_hyper(tval, &sfp->sf_ffiles); 3156 txdr_hyper(tval, &sfp->sf_afiles); 3157 sfp->sf_invarsec = 0; 3158 } else { 3159 sfp->sf_tsize = txdr_unsigned(NFS_MAXDGRAMDATA); 3160 sfp->sf_bsize = txdr_unsigned(sf->f_bsize); 3161 sfp->sf_blocks = txdr_unsigned(sf->f_blocks); 3162 sfp->sf_bfree = txdr_unsigned(sf->f_bfree); 3163 sfp->sf_bavail = txdr_unsigned(sf->f_bavail); 3164 } 3165 nfsm_srvdone; 3166 } 3167 3168 /* 3169 * nfs fsinfo service 3170 */ 3171 int 3172 nfsrv_fsinfo(nfsd, slp, procp, mrq) 3173 struct nfsrv_descript *nfsd; 3174 struct nfssvc_sock *slp; 3175 struct proc *procp; 3176 struct mbuf **mrq; 3177 { 3178 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3179 struct mbuf *nam = nfsd->nd_nam; 3180 caddr_t dpos = nfsd->nd_dpos; 3181 struct ucred *cred = &nfsd->nd_cr; 3182 u_int32_t *tl; 3183 struct nfsv3_fsinfo *sip; 3184 int32_t t1; 3185 caddr_t bpos; 3186 int error = 0, rdonly, cache, getret = 1, pref; 3187 char *cp2; 3188 struct mbuf *mb, *mb2, *mreq; 3189 struct vnode *vp; 3190 struct vattr at; 3191 nfsfh_t nfh; 3192 fhandle_t *fhp; 3193 u_quad_t frev, maxfsize; 3194 struct statfs sb; 3195 3196 #ifndef nolint 3197 cache = 0; 3198 #endif 3199 fhp = &nfh.fh_generic; 3200 nfsm_srvmtofh(fhp); 3201 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 3202 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 3203 if (error) { 3204 nfsm_reply(NFSX_UNSIGNED); 3205 nfsm_srvpostop_attr(getret, &at); 3206 return (0); 3207 } 3208 3209 /* XXX Try to make a guess on the max file size. */ 3210 VFS_STATFS(vp->v_mount, &sb, (struct proc *)0); 3211 maxfsize = (u_quad_t)0x80000000 * sb.f_bsize - 1; 3212 3213 getret = VOP_GETATTR(vp, &at, cred, procp); 3214 vput(vp); 3215 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3FSINFO); 3216 nfsm_srvpostop_attr(getret, &at); 3217 nfsm_build(sip, struct nfsv3_fsinfo *, NFSX_V3FSINFO); 3218 3219 /* 3220 * XXX 3221 * There should be file system VFS OP(s) to get this information. 3222 * For now, assume ufs. 3223 */ 3224 if (slp->ns_so->so_type == SOCK_DGRAM) 3225 pref = NFS_MAXDGRAMDATA; 3226 else 3227 pref = NFS_MAXDATA; 3228 sip->fs_rtmax = txdr_unsigned(NFS_MAXDATA); 3229 sip->fs_rtpref = txdr_unsigned(pref); 3230 sip->fs_rtmult = txdr_unsigned(NFS_FABLKSIZE); 3231 sip->fs_wtmax = txdr_unsigned(NFS_MAXDATA); 3232 sip->fs_wtpref = txdr_unsigned(pref); 3233 sip->fs_wtmult = txdr_unsigned(NFS_FABLKSIZE); 3234 sip->fs_dtpref = txdr_unsigned(pref); 3235 txdr_hyper(maxfsize, &sip->fs_maxfilesize); 3236 sip->fs_timedelta.nfsv3_sec = 0; 3237 sip->fs_timedelta.nfsv3_nsec = txdr_unsigned(1); 3238 sip->fs_properties = txdr_unsigned(NFSV3FSINFO_LINK | 3239 NFSV3FSINFO_SYMLINK | NFSV3FSINFO_HOMOGENEOUS | 3240 NFSV3FSINFO_CANSETTIME); 3241 nfsm_srvdone; 3242 } 3243 3244 /* 3245 * nfs pathconf service 3246 */ 3247 int 3248 nfsrv_pathconf(nfsd, slp, procp, mrq) 3249 struct nfsrv_descript *nfsd; 3250 struct nfssvc_sock *slp; 3251 struct proc *procp; 3252 struct mbuf **mrq; 3253 { 3254 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3255 struct mbuf *nam = nfsd->nd_nam; 3256 caddr_t dpos = nfsd->nd_dpos; 3257 struct ucred *cred = &nfsd->nd_cr; 3258 u_int32_t *tl; 3259 struct nfsv3_pathconf *pc; 3260 int32_t t1; 3261 caddr_t bpos; 3262 int error = 0, rdonly, cache, getret = 1; 3263 register_t linkmax, namemax, chownres, notrunc; 3264 char *cp2; 3265 struct mbuf *mb, *mb2, *mreq; 3266 struct vnode *vp; 3267 struct vattr at; 3268 nfsfh_t nfh; 3269 fhandle_t *fhp; 3270 u_quad_t frev; 3271 3272 #ifndef nolint 3273 cache = 0; 3274 #endif 3275 fhp = &nfh.fh_generic; 3276 nfsm_srvmtofh(fhp); 3277 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 3278 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 3279 if (error) { 3280 nfsm_reply(NFSX_UNSIGNED); 3281 nfsm_srvpostop_attr(getret, &at); 3282 return (0); 3283 } 3284 error = VOP_PATHCONF(vp, _PC_LINK_MAX, &linkmax); 3285 if (!error) 3286 error = VOP_PATHCONF(vp, _PC_NAME_MAX, &namemax); 3287 if (!error) 3288 error = VOP_PATHCONF(vp, _PC_CHOWN_RESTRICTED, &chownres); 3289 if (!error) 3290 error = VOP_PATHCONF(vp, _PC_NO_TRUNC, ¬runc); 3291 getret = VOP_GETATTR(vp, &at, cred, procp); 3292 vput(vp); 3293 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3PATHCONF); 3294 nfsm_srvpostop_attr(getret, &at); 3295 if (error) 3296 return (0); 3297 nfsm_build(pc, struct nfsv3_pathconf *, NFSX_V3PATHCONF); 3298 3299 pc->pc_linkmax = txdr_unsigned(linkmax); 3300 pc->pc_namemax = txdr_unsigned(namemax); 3301 pc->pc_notrunc = txdr_unsigned(notrunc); 3302 pc->pc_chownrestricted = txdr_unsigned(chownres); 3303 3304 /* 3305 * These should probably be supported by VOP_PATHCONF(), but 3306 * until msdosfs is exportable (why would you want to?), the 3307 * Unix defaults should be ok. 3308 */ 3309 pc->pc_caseinsensitive = nfs_false; 3310 pc->pc_casepreserving = nfs_true; 3311 nfsm_srvdone; 3312 } 3313 3314 /* 3315 * Null operation, used by clients to ping server 3316 */ 3317 /* ARGSUSED */ 3318 int 3319 nfsrv_null(nfsd, slp, procp, mrq) 3320 struct nfsrv_descript *nfsd; 3321 struct nfssvc_sock *slp; 3322 struct proc *procp; 3323 struct mbuf **mrq; 3324 { 3325 struct mbuf *mrep = nfsd->nd_mrep; 3326 caddr_t bpos; 3327 int error = NFSERR_RETVOID, cache = 0; 3328 struct mbuf *mb, *mreq; 3329 u_quad_t frev; 3330 3331 nfsm_reply(0); 3332 return (0); 3333 } 3334 3335 /* 3336 * No operation, used for obsolete procedures 3337 */ 3338 /* ARGSUSED */ 3339 int 3340 nfsrv_noop(nfsd, slp, procp, mrq) 3341 struct nfsrv_descript *nfsd; 3342 struct nfssvc_sock *slp; 3343 struct proc *procp; 3344 struct mbuf **mrq; 3345 { 3346 struct mbuf *mrep = nfsd->nd_mrep; 3347 caddr_t bpos; 3348 int error, cache = 0; 3349 struct mbuf *mb, *mreq; 3350 u_quad_t frev; 3351 3352 if (nfsd->nd_repstat) 3353 error = nfsd->nd_repstat; 3354 else 3355 error = EPROCUNAVAIL; 3356 nfsm_reply(0); 3357 return (0); 3358 } 3359 3360 /* 3361 * Perform access checking for vnodes obtained from file handles that would 3362 * refer to files already opened by a Unix client. You cannot just use 3363 * vn_writechk() and VOP_ACCESS() for two reasons. 3364 * 1 - You must check for exported rdonly as well as MNT_RDONLY for the write case 3365 * 2 - The owner is to be given access irrespective of mode bits for some 3366 * operations, so that processes that chmod after opening a file don't 3367 * break. I don't like this because it opens a security hole, but since 3368 * the nfs server opens a security hole the size of a barn door anyhow, 3369 * what the heck. 3370 * 3371 * The exception to rule 2 is EPERM. If a file is IMMUTABLE, VOP_ACCESS() 3372 * will return EPERM instead of EACCESS. EPERM is always an error. 3373 */ 3374 int 3375 nfsrv_access(vp, flags, cred, rdonly, p, override) 3376 struct vnode *vp; 3377 int flags; 3378 struct ucred *cred; 3379 int rdonly; 3380 struct proc *p; 3381 { 3382 struct vattr vattr; 3383 int error; 3384 if (flags & VWRITE) { 3385 /* Just vn_writechk() changed to check rdonly */ 3386 /* 3387 * Disallow write attempts on read-only file systems; 3388 * unless the file is a socket or a block or character 3389 * device resident on the file system. 3390 */ 3391 if (rdonly || (vp->v_mount->mnt_flag & MNT_RDONLY)) { 3392 switch (vp->v_type) { 3393 case VREG: 3394 case VDIR: 3395 case VLNK: 3396 return (EROFS); 3397 default: 3398 break; 3399 } 3400 } 3401 /* 3402 * If there's shared text associated with 3403 * the inode, try to free it up once. If 3404 * we fail, we can't allow writing. 3405 */ 3406 if ((vp->v_flag & VTEXT) && !uvm_vnp_uncache(vp)) 3407 return (ETXTBSY); 3408 } 3409 error = VOP_GETATTR(vp, &vattr, cred, p); 3410 if (error) 3411 return (error); 3412 error = VOP_ACCESS(vp, flags, cred, p); 3413 /* 3414 * Allow certain operations for the owner (reads and writes 3415 * on files that are already open). 3416 */ 3417 if (override && error == EACCES && cred->cr_uid == vattr.va_uid) 3418 error = 0; 3419 return error; 3420 } 3421
Indexes created Tue Sep 23 13:09:54 GMT 2025