nfs_serv.c revision 1.50
1 /* $NetBSD: nfs_serv.c,v 1.50 1999/03/30 12:01:18 mycroft 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 extern struct nfs_public nfs_pub; 96 int nfsrvw_procrastinate = NFS_GATHERDELAY * 1000; 97 98 /* 99 * nfs v3 access service 100 */ 101 int 102 nfsrv3_access(nfsd, slp, procp, mrq) 103 struct nfsrv_descript *nfsd; 104 struct nfssvc_sock *slp; 105 struct proc *procp; 106 struct mbuf **mrq; 107 { 108 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 109 struct mbuf *nam = nfsd->nd_nam; 110 caddr_t dpos = nfsd->nd_dpos; 111 struct ucred *cred = &nfsd->nd_cr; 112 struct vnode *vp; 113 nfsfh_t nfh; 114 fhandle_t *fhp; 115 register u_int32_t *tl; 116 register int32_t t1; 117 caddr_t bpos; 118 int error = 0, rdonly, cache = 0, getret; 119 char *cp2; 120 struct mbuf *mb, *mreq, *mb2; 121 struct vattr va; 122 u_long inmode, testmode, outmode; 123 u_quad_t frev; 124 125 fhp = &nfh.fh_generic; 126 nfsm_srvmtofh(fhp); 127 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 128 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, &rdonly, 129 (nfsd->nd_flag & ND_KERBAUTH), FALSE); 130 if (error) { 131 nfsm_reply(NFSX_UNSIGNED); 132 nfsm_srvpostop_attr(1, (struct vattr *)0); 133 return (0); 134 } 135 inmode = fxdr_unsigned(u_int32_t, *tl); 136 outmode = 0; 137 if ((inmode & NFSV3ACCESS_READ) && 138 nfsrv_access(vp, VREAD, cred, rdonly, procp, 0) == 0) 139 outmode |= NFSV3ACCESS_READ; 140 if (vp->v_type != VDIR) { 141 testmode = inmode & (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND); 142 if (testmode && 143 nfsrv_access(vp, VWRITE, cred, rdonly, procp, 0) == 0) 144 outmode |= testmode; 145 if ((inmode & NFSV3ACCESS_EXECUTE) && 146 nfsrv_access(vp, VEXEC, cred, rdonly, procp, 0) == 0) 147 outmode |= NFSV3ACCESS_EXECUTE; 148 } else { 149 testmode = inmode & (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | 150 NFSV3ACCESS_DELETE); 151 if (testmode && 152 nfsrv_access(vp, VWRITE, cred, rdonly, procp, 0) == 0) 153 outmode |= testmode; 154 if ((inmode & NFSV3ACCESS_LOOKUP) && 155 nfsrv_access(vp, VEXEC, cred, rdonly, procp, 0) == 0) 156 outmode |= NFSV3ACCESS_LOOKUP; 157 } 158 getret = VOP_GETATTR(vp, &va, cred, procp); 159 vput(vp); 160 nfsm_reply(NFSX_POSTOPATTR(1) + NFSX_UNSIGNED); 161 nfsm_srvpostop_attr(getret, &va); 162 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 163 *tl = txdr_unsigned(outmode); 164 nfsm_srvdone; 165 } 166 167 /* 168 * nfs getattr service 169 */ 170 int 171 nfsrv_getattr(nfsd, slp, procp, mrq) 172 struct nfsrv_descript *nfsd; 173 struct nfssvc_sock *slp; 174 struct proc *procp; 175 struct mbuf **mrq; 176 { 177 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 178 struct mbuf *nam = nfsd->nd_nam; 179 caddr_t dpos = nfsd->nd_dpos; 180 struct ucred *cred = &nfsd->nd_cr; 181 register struct nfs_fattr *fp; 182 struct vattr va; 183 struct vnode *vp; 184 nfsfh_t nfh; 185 fhandle_t *fhp; 186 register u_int32_t *tl; 187 register int32_t t1; 188 caddr_t bpos; 189 int error = 0, rdonly, cache; 190 char *cp2; 191 struct mbuf *mb, *mb2, *mreq; 192 u_quad_t frev; 193 194 fhp = &nfh.fh_generic; 195 nfsm_srvmtofh(fhp); 196 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, &rdonly, 197 (nfsd->nd_flag & ND_KERBAUTH), FALSE); 198 if (error) { 199 nfsm_reply(0); 200 return (0); 201 } 202 nqsrv_getl(vp, ND_READ); 203 error = VOP_GETATTR(vp, &va, cred, procp); 204 vput(vp); 205 nfsm_reply(NFSX_FATTR(nfsd->nd_flag & ND_NFSV3)); 206 if (error) 207 return (0); 208 nfsm_build(fp, struct nfs_fattr *, NFSX_FATTR(nfsd->nd_flag & ND_NFSV3)); 209 nfsm_srvfillattr(&va, fp); 210 nfsm_srvdone; 211 } 212 213 /* 214 * nfs setattr service 215 */ 216 int 217 nfsrv_setattr(nfsd, slp, procp, mrq) 218 struct nfsrv_descript *nfsd; 219 struct nfssvc_sock *slp; 220 struct proc *procp; 221 struct mbuf **mrq; 222 { 223 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 224 struct mbuf *nam = nfsd->nd_nam; 225 caddr_t dpos = nfsd->nd_dpos; 226 struct ucred *cred = &nfsd->nd_cr; 227 struct vattr va, preat; 228 register struct nfsv2_sattr *sp; 229 register struct nfs_fattr *fp; 230 struct vnode *vp; 231 nfsfh_t nfh; 232 fhandle_t *fhp; 233 register u_int32_t *tl; 234 register int32_t t1; 235 caddr_t bpos; 236 int error = 0, rdonly, cache, preat_ret = 1, postat_ret = 1; 237 int v3 = (nfsd->nd_flag & ND_NFSV3), gcheck = 0; 238 char *cp2; 239 struct mbuf *mb, *mb2, *mreq; 240 u_quad_t frev; 241 struct timespec guard; 242 243 fhp = &nfh.fh_generic; 244 nfsm_srvmtofh(fhp); 245 VATTR_NULL(&va); 246 if (v3) { 247 nfsm_srvsattr(&va); 248 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 249 gcheck = fxdr_unsigned(int, *tl); 250 if (gcheck) { 251 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 252 fxdr_nfsv3time(tl, &guard); 253 } 254 } else { 255 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 256 /* 257 * Nah nah nah nah na nah 258 * There is a bug in the Sun client that puts 0xffff in the mode 259 * field of sattr when it should put in 0xffffffff. The u_short 260 * doesn't sign extend. 261 * --> check the low order 2 bytes for 0xffff 262 */ 263 if ((fxdr_unsigned(int, sp->sa_mode) & 0xffff) != 0xffff) 264 va.va_mode = nfstov_mode(sp->sa_mode); 265 if (sp->sa_uid != nfs_xdrneg1) 266 va.va_uid = fxdr_unsigned(uid_t, sp->sa_uid); 267 if (sp->sa_gid != nfs_xdrneg1) 268 va.va_gid = fxdr_unsigned(gid_t, sp->sa_gid); 269 if (sp->sa_size != nfs_xdrneg1) 270 va.va_size = fxdr_unsigned(u_quad_t, sp->sa_size); 271 if (sp->sa_atime.nfsv2_sec != nfs_xdrneg1) { 272 #ifdef notyet 273 fxdr_nfsv2time(&sp->sa_atime, &va.va_atime); 274 #else 275 va.va_atime.tv_sec = 276 fxdr_unsigned(u_int32_t,sp->sa_atime.nfsv2_sec); 277 va.va_atime.tv_nsec = 0; 278 #endif 279 } 280 if (sp->sa_mtime.nfsv2_sec != nfs_xdrneg1) 281 fxdr_nfsv2time(&sp->sa_mtime, &va.va_mtime); 282 283 } 284 285 /* 286 * Now that we have all the fields, lets do it. 287 */ 288 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, &rdonly, 289 (nfsd->nd_flag & ND_KERBAUTH), FALSE); 290 if (error) { 291 nfsm_reply(2 * NFSX_UNSIGNED); 292 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 293 return (0); 294 } 295 nqsrv_getl(vp, ND_WRITE); 296 if (v3) { 297 error = preat_ret = VOP_GETATTR(vp, &preat, cred, procp); 298 if (!error && gcheck && 299 (preat.va_ctime.tv_sec != guard.tv_sec || 300 preat.va_ctime.tv_nsec != guard.tv_nsec)) 301 error = NFSERR_NOT_SYNC; 302 if (error) { 303 vput(vp); 304 nfsm_reply(NFSX_WCCDATA(v3)); 305 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 306 return (0); 307 } 308 } 309 310 /* 311 * If the size is being changed write acces is required, otherwise 312 * just check for a read only file system. 313 */ 314 if (va.va_size == ((u_quad_t)((quad_t) -1))) { 315 if (rdonly || (vp->v_mount->mnt_flag & MNT_RDONLY)) { 316 error = EROFS; 317 goto out; 318 } 319 } else { 320 if (vp->v_type == VDIR) { 321 error = EISDIR; 322 goto out; 323 } else if ((error = nfsrv_access(vp, VWRITE, cred, rdonly, 324 procp, 0)) != 0) 325 goto out; 326 } 327 error = VOP_SETATTR(vp, &va, cred, procp); 328 postat_ret = VOP_GETATTR(vp, &va, cred, procp); 329 if (!error) 330 error = postat_ret; 331 out: 332 vput(vp); 333 nfsm_reply(NFSX_WCCORFATTR(v3)); 334 if (v3) { 335 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 336 return (0); 337 } else { 338 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 339 nfsm_srvfillattr(&va, fp); 340 } 341 nfsm_srvdone; 342 } 343 344 /* 345 * nfs lookup rpc 346 */ 347 int 348 nfsrv_lookup(nfsd, slp, procp, mrq) 349 struct nfsrv_descript *nfsd; 350 struct nfssvc_sock *slp; 351 struct proc *procp; 352 struct mbuf **mrq; 353 { 354 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 355 struct mbuf *nam = nfsd->nd_nam; 356 caddr_t dpos = nfsd->nd_dpos; 357 struct ucred *cred = &nfsd->nd_cr; 358 register struct nfs_fattr *fp; 359 struct nameidata nd, ind, *ndp = &nd; 360 struct vnode *vp, *dirp; 361 nfsfh_t nfh; 362 fhandle_t *fhp; 363 register caddr_t cp; 364 register u_int32_t *tl; 365 register int32_t t1; 366 caddr_t bpos; 367 int error = 0, cache, len, dirattr_ret = 1; 368 int v3 = (nfsd->nd_flag & ND_NFSV3), pubflag; 369 char *cp2; 370 struct mbuf *mb, *mb2, *mreq; 371 struct vattr va, dirattr; 372 u_quad_t frev; 373 374 fhp = &nfh.fh_generic; 375 nfsm_srvmtofh(fhp); 376 nfsm_srvnamesiz(len); 377 378 pubflag = nfs_ispublicfh(fhp); 379 380 nd.ni_cnd.cn_cred = cred; 381 nd.ni_cnd.cn_nameiop = LOOKUP; 382 nd.ni_cnd.cn_flags = LOCKLEAF | SAVESTART; 383 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 384 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), pubflag); 385 386 if (!error && pubflag) { 387 if (nd.ni_vp->v_type == VDIR && nfs_pub.np_index != NULL) { 388 /* 389 * Setup call to lookup() to see if we can find 390 * the index file. Arguably, this doesn't belong 391 * in a kernel.. Ugh. 392 */ 393 ind = nd; 394 VOP_UNLOCK(nd.ni_vp, 0); 395 ind.ni_pathlen = strlen(nfs_pub.np_index); 396 ind.ni_cnd.cn_nameptr = ind.ni_cnd.cn_pnbuf = 397 nfs_pub.np_index; 398 ind.ni_startdir = nd.ni_vp; 399 VREF(ind.ni_startdir); 400 error = lookup(&ind); 401 if (!error) { 402 /* 403 * Found an index file. Get rid of 404 * the old references. 405 */ 406 if (dirp) 407 vrele(dirp); 408 dirp = nd.ni_vp; 409 vrele(nd.ni_startdir); 410 ndp = &ind; 411 } else 412 error = 0; 413 } 414 /* 415 * If the public filehandle was used, check that this lookup 416 * didn't result in a filehandle outside the publicly exported 417 * filesystem. 418 */ 419 420 if (!error && ndp->ni_vp->v_mount != nfs_pub.np_mount) { 421 vput(nd.ni_vp); 422 error = EPERM; 423 } 424 } 425 426 if (dirp) { 427 if (v3) 428 dirattr_ret = VOP_GETATTR(dirp, &dirattr, cred, 429 procp); 430 vrele(dirp); 431 } 432 433 if (error) { 434 nfsm_reply(NFSX_POSTOPATTR(v3)); 435 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 436 return (0); 437 } 438 439 nqsrv_getl(ndp->ni_startdir, ND_READ); 440 vrele(ndp->ni_startdir); 441 FREE(nd.ni_cnd.cn_pnbuf, M_NAMEI); 442 vp = ndp->ni_vp; 443 memset((caddr_t)fhp, 0, sizeof(nfh)); 444 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; 445 error = VFS_VPTOFH(vp, &fhp->fh_fid); 446 if (!error) 447 error = VOP_GETATTR(vp, &va, cred, procp); 448 vput(vp); 449 nfsm_reply(NFSX_SRVFH(v3) + NFSX_POSTOPORFATTR(v3) + NFSX_POSTOPATTR(v3)); 450 if (error) { 451 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 452 return (0); 453 } 454 nfsm_srvfhtom(fhp, v3); 455 if (v3) { 456 nfsm_srvpostop_attr(0, &va); 457 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 458 } else { 459 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 460 nfsm_srvfillattr(&va, fp); 461 } 462 nfsm_srvdone; 463 } 464 465 /* 466 * nfs readlink service 467 */ 468 int 469 nfsrv_readlink(nfsd, slp, procp, mrq) 470 struct nfsrv_descript *nfsd; 471 struct nfssvc_sock *slp; 472 struct proc *procp; 473 struct mbuf **mrq; 474 { 475 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 476 struct mbuf *nam = nfsd->nd_nam; 477 caddr_t dpos = nfsd->nd_dpos; 478 struct ucred *cred = &nfsd->nd_cr; 479 struct iovec iv[(NFS_MAXPATHLEN+MLEN-1)/MLEN]; 480 register struct iovec *ivp = iv; 481 register struct mbuf *mp; 482 register u_int32_t *tl; 483 register int32_t t1; 484 caddr_t bpos; 485 int error = 0, rdonly, cache, i, tlen, len, getret; 486 int v3 = (nfsd->nd_flag & ND_NFSV3); 487 char *cp2; 488 struct mbuf *mb, *mb2, *mp2 = NULL, *mp3 = NULL, *mreq; 489 struct vnode *vp; 490 struct vattr attr; 491 nfsfh_t nfh; 492 fhandle_t *fhp; 493 struct uio io, *uiop = &io; 494 u_quad_t frev; 495 496 fhp = &nfh.fh_generic; 497 nfsm_srvmtofh(fhp); 498 len = 0; 499 i = 0; 500 while (len < NFS_MAXPATHLEN) { 501 MGET(mp, M_WAIT, MT_DATA); 502 MCLGET(mp, M_WAIT); 503 mp->m_len = NFSMSIZ(mp); 504 if (len == 0) 505 mp3 = mp2 = mp; 506 else { 507 mp2->m_next = mp; 508 mp2 = mp; 509 } 510 if ((len+mp->m_len) > NFS_MAXPATHLEN) { 511 mp->m_len = NFS_MAXPATHLEN-len; 512 len = NFS_MAXPATHLEN; 513 } else 514 len += mp->m_len; 515 ivp->iov_base = mtod(mp, caddr_t); 516 ivp->iov_len = mp->m_len; 517 i++; 518 ivp++; 519 } 520 uiop->uio_iov = iv; 521 uiop->uio_iovcnt = i; 522 uiop->uio_offset = 0; 523 uiop->uio_resid = len; 524 uiop->uio_rw = UIO_READ; 525 uiop->uio_segflg = UIO_SYSSPACE; 526 uiop->uio_procp = (struct proc *)0; 527 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 528 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 529 if (error) { 530 m_freem(mp3); 531 nfsm_reply(2 * NFSX_UNSIGNED); 532 nfsm_srvpostop_attr(1, (struct vattr *)0); 533 return (0); 534 } 535 if (vp->v_type != VLNK) { 536 if (v3) 537 error = EINVAL; 538 else 539 error = ENXIO; 540 goto out; 541 } 542 nqsrv_getl(vp, ND_READ); 543 error = VOP_READLINK(vp, uiop, cred); 544 out: 545 getret = VOP_GETATTR(vp, &attr, cred, procp); 546 vput(vp); 547 if (error) 548 m_freem(mp3); 549 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_UNSIGNED); 550 if (v3) { 551 nfsm_srvpostop_attr(getret, &attr); 552 if (error) 553 return (0); 554 } 555 if (uiop->uio_resid > 0) { 556 len -= uiop->uio_resid; 557 tlen = nfsm_rndup(len); 558 nfsm_adj(mp3, NFS_MAXPATHLEN-tlen, tlen-len); 559 } 560 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 561 *tl = txdr_unsigned(len); 562 mb->m_next = mp3; 563 nfsm_srvdone; 564 } 565 566 /* 567 * nfs read service 568 */ 569 int 570 nfsrv_read(nfsd, slp, procp, mrq) 571 struct nfsrv_descript *nfsd; 572 struct nfssvc_sock *slp; 573 struct proc *procp; 574 struct mbuf **mrq; 575 { 576 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 577 struct mbuf *nam = nfsd->nd_nam; 578 caddr_t dpos = nfsd->nd_dpos; 579 struct ucred *cred = &nfsd->nd_cr; 580 register struct iovec *iv; 581 struct iovec *iv2; 582 register struct mbuf *m; 583 register struct nfs_fattr *fp; 584 register u_int32_t *tl; 585 register int32_t t1; 586 register int i; 587 caddr_t bpos; 588 int error = 0, rdonly, cache, cnt, len, left, siz, tlen, getret; 589 int v3 = (nfsd->nd_flag & ND_NFSV3), reqlen; 590 char *cp2; 591 struct mbuf *mb, *mb2, *mreq; 592 struct mbuf *m2; 593 struct vnode *vp; 594 nfsfh_t nfh; 595 fhandle_t *fhp; 596 struct uio io, *uiop = &io; 597 struct vattr va; 598 off_t off; 599 u_quad_t frev; 600 601 fhp = &nfh.fh_generic; 602 nfsm_srvmtofh(fhp); 603 if (v3) { 604 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 605 off = fxdr_hyper(tl); 606 } else { 607 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 608 off = (off_t)fxdr_unsigned(u_int32_t, *tl); 609 } 610 nfsm_srvstrsiz(reqlen, NFS_SRVMAXDATA(nfsd)); 611 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 612 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 613 if (error) { 614 nfsm_reply(2 * NFSX_UNSIGNED); 615 nfsm_srvpostop_attr(1, (struct vattr *)0); 616 return (0); 617 } 618 if (vp->v_type != VREG) { 619 if (v3) 620 error = EINVAL; 621 else 622 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 623 } 624 if (!error) { 625 nqsrv_getl(vp, ND_READ); 626 if ((error = nfsrv_access(vp, VREAD, cred, rdonly, procp, 1)) != 0) 627 error = nfsrv_access(vp, VEXEC, cred, rdonly, procp, 1); 628 } 629 getret = VOP_GETATTR(vp, &va, cred, procp); 630 if (!error) 631 error = getret; 632 if (error) { 633 vput(vp); 634 nfsm_reply(NFSX_POSTOPATTR(v3)); 635 nfsm_srvpostop_attr(getret, &va); 636 return (0); 637 } 638 if (off >= va.va_size) 639 cnt = 0; 640 else if ((off + reqlen) > va.va_size) 641 cnt = nfsm_rndup(va.va_size - off); 642 else 643 cnt = reqlen; 644 nfsm_reply(NFSX_POSTOPORFATTR(v3) + 3 * NFSX_UNSIGNED+nfsm_rndup(cnt)); 645 if (v3) { 646 nfsm_build(tl, u_int32_t *, NFSX_V3FATTR + 4 * NFSX_UNSIGNED); 647 *tl++ = nfs_true; 648 fp = (struct nfs_fattr *)tl; 649 tl += (NFSX_V3FATTR / sizeof (u_int32_t)); 650 } else { 651 nfsm_build(tl, u_int32_t *, NFSX_V2FATTR + NFSX_UNSIGNED); 652 fp = (struct nfs_fattr *)tl; 653 tl += (NFSX_V2FATTR / sizeof (u_int32_t)); 654 } 655 len = left = cnt; 656 if (cnt > 0) { 657 /* 658 * Generate the mbuf list with the uio_iov ref. to it. 659 */ 660 i = 0; 661 m = m2 = mb; 662 while (left > 0) { 663 siz = min(M_TRAILINGSPACE(m), left); 664 if (siz > 0) { 665 left -= siz; 666 i++; 667 } 668 if (left > 0) { 669 MGET(m, M_WAIT, MT_DATA); 670 MCLGET(m, M_WAIT); 671 m->m_len = 0; 672 m2->m_next = m; 673 m2 = m; 674 } 675 } 676 MALLOC(iv, struct iovec *, i * sizeof (struct iovec), 677 M_TEMP, M_WAITOK); 678 uiop->uio_iov = iv2 = iv; 679 m = mb; 680 left = cnt; 681 i = 0; 682 while (left > 0) { 683 if (m == NULL) 684 panic("nfsrv_read iov"); 685 siz = min(M_TRAILINGSPACE(m), left); 686 if (siz > 0) { 687 iv->iov_base = mtod(m, caddr_t) + m->m_len; 688 iv->iov_len = siz; 689 m->m_len += siz; 690 left -= siz; 691 iv++; 692 i++; 693 } 694 m = m->m_next; 695 } 696 uiop->uio_iovcnt = i; 697 uiop->uio_offset = off; 698 uiop->uio_resid = cnt; 699 uiop->uio_rw = UIO_READ; 700 uiop->uio_segflg = UIO_SYSSPACE; 701 error = VOP_READ(vp, uiop, IO_NODELOCKED, cred); 702 off = uiop->uio_offset; 703 FREE((caddr_t)iv2, M_TEMP); 704 if (error || (getret = VOP_GETATTR(vp, &va, cred, procp)) != 0){ 705 if (!error) 706 error = getret; 707 m_freem(mreq); 708 vput(vp); 709 nfsm_reply(NFSX_POSTOPATTR(v3)); 710 nfsm_srvpostop_attr(getret, &va); 711 return (0); 712 } 713 } else 714 uiop->uio_resid = 0; 715 vput(vp); 716 nfsm_srvfillattr(&va, fp); 717 len -= uiop->uio_resid; 718 tlen = nfsm_rndup(len); 719 if (cnt != tlen || tlen != len) 720 nfsm_adj(mb, cnt - tlen, tlen - len); 721 if (v3) { 722 *tl++ = txdr_unsigned(len); 723 if (len < reqlen) 724 *tl++ = nfs_true; 725 else 726 *tl++ = nfs_false; 727 } 728 *tl = txdr_unsigned(len); 729 nfsm_srvdone; 730 } 731 732 /* 733 * nfs write service 734 */ 735 int 736 nfsrv_write(nfsd, slp, procp, mrq) 737 struct nfsrv_descript *nfsd; 738 struct nfssvc_sock *slp; 739 struct proc *procp; 740 struct mbuf **mrq; 741 { 742 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 743 struct mbuf *nam = nfsd->nd_nam; 744 caddr_t dpos = nfsd->nd_dpos; 745 struct ucred *cred = &nfsd->nd_cr; 746 register struct iovec *ivp; 747 register int i, cnt; 748 register struct mbuf *mp; 749 register struct nfs_fattr *fp; 750 struct iovec *iv; 751 struct vattr va, forat; 752 register u_int32_t *tl; 753 register int32_t t1; 754 caddr_t bpos; 755 int error = 0, rdonly, cache, len, forat_ret = 1; 756 int ioflags, aftat_ret = 1, retlen, zeroing, adjust; 757 int stable = NFSV3WRITE_FILESYNC; 758 int v3 = (nfsd->nd_flag & ND_NFSV3); 759 char *cp2; 760 struct mbuf *mb, *mb2, *mreq; 761 struct vnode *vp; 762 nfsfh_t nfh; 763 fhandle_t *fhp; 764 struct uio io, *uiop = &io; 765 off_t off; 766 u_quad_t frev; 767 768 if (mrep == NULL) { 769 *mrq = NULL; 770 return (0); 771 } 772 fhp = &nfh.fh_generic; 773 nfsm_srvmtofh(fhp); 774 if (v3) { 775 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 776 off = fxdr_hyper(tl); 777 tl += 3; 778 stable = fxdr_unsigned(int, *tl++); 779 } else { 780 nfsm_dissect(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 781 off = (off_t)fxdr_unsigned(u_int32_t, *++tl); 782 tl += 2; 783 } 784 retlen = len = fxdr_unsigned(int32_t, *tl); 785 cnt = i = 0; 786 787 /* 788 * For NFS Version 2, it is not obvious what a write of zero length 789 * should do, but I might as well be consistent with Version 3, 790 * which is to return ok so long as there are no permission problems. 791 */ 792 if (len > 0) { 793 zeroing = 1; 794 mp = mrep; 795 while (mp) { 796 if (mp == md) { 797 zeroing = 0; 798 adjust = dpos - mtod(mp, caddr_t); 799 mp->m_len -= adjust; 800 if (mp->m_len > 0 && adjust > 0) 801 NFSMADV(mp, adjust); 802 } 803 if (zeroing) 804 mp->m_len = 0; 805 else if (mp->m_len > 0) { 806 i += mp->m_len; 807 if (i > len) { 808 mp->m_len -= (i - len); 809 zeroing = 1; 810 } 811 if (mp->m_len > 0) 812 cnt++; 813 } 814 mp = mp->m_next; 815 } 816 } 817 if (len > NFS_MAXDATA || len < 0 || i < len) { 818 error = EIO; 819 nfsm_reply(2 * NFSX_UNSIGNED); 820 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 821 return (0); 822 } 823 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 824 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 825 if (error) { 826 nfsm_reply(2 * NFSX_UNSIGNED); 827 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 828 return (0); 829 } 830 if (v3) 831 forat_ret = VOP_GETATTR(vp, &forat, cred, procp); 832 if (vp->v_type != VREG) { 833 if (v3) 834 error = EINVAL; 835 else 836 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 837 } 838 if (!error) { 839 nqsrv_getl(vp, ND_WRITE); 840 error = nfsrv_access(vp, VWRITE, cred, rdonly, procp, 1); 841 } 842 if (error) { 843 vput(vp); 844 nfsm_reply(NFSX_WCCDATA(v3)); 845 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 846 return (0); 847 } 848 849 if (len > 0) { 850 MALLOC(ivp, struct iovec *, cnt * sizeof (struct iovec), M_TEMP, 851 M_WAITOK); 852 uiop->uio_iov = iv = ivp; 853 uiop->uio_iovcnt = cnt; 854 mp = mrep; 855 while (mp) { 856 if (mp->m_len > 0) { 857 ivp->iov_base = mtod(mp, caddr_t); 858 ivp->iov_len = mp->m_len; 859 ivp++; 860 } 861 mp = mp->m_next; 862 } 863 864 /* 865 * XXX 866 * The IO_METASYNC flag indicates that all metadata (and not just 867 * enough to ensure data integrity) mus be written to stable storage 868 * synchronously. 869 * (IO_METASYNC is not yet implemented in 4.4BSD-Lite.) 870 */ 871 if (stable == NFSV3WRITE_UNSTABLE) 872 ioflags = IO_NODELOCKED; 873 else if (stable == NFSV3WRITE_DATASYNC) 874 ioflags = (IO_SYNC | IO_NODELOCKED); 875 else 876 ioflags = (IO_METASYNC | IO_SYNC | IO_NODELOCKED); 877 uiop->uio_resid = len; 878 uiop->uio_rw = UIO_WRITE; 879 uiop->uio_segflg = UIO_SYSSPACE; 880 uiop->uio_procp = (struct proc *)0; 881 uiop->uio_offset = off; 882 error = VOP_WRITE(vp, uiop, ioflags, cred); 883 nfsstats.srvvop_writes++; 884 FREE((caddr_t)iv, M_TEMP); 885 } 886 aftat_ret = VOP_GETATTR(vp, &va, cred, procp); 887 vput(vp); 888 if (!error) 889 error = aftat_ret; 890 nfsm_reply(NFSX_PREOPATTR(v3) + NFSX_POSTOPORFATTR(v3) + 891 2 * NFSX_UNSIGNED + NFSX_WRITEVERF(v3)); 892 if (v3) { 893 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 894 if (error) 895 return (0); 896 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 897 *tl++ = txdr_unsigned(retlen); 898 if (stable == NFSV3WRITE_UNSTABLE) 899 *tl++ = txdr_unsigned(stable); 900 else 901 *tl++ = txdr_unsigned(NFSV3WRITE_FILESYNC); 902 /* 903 * Actually, there is no need to txdr these fields, 904 * but it may make the values more human readable, 905 * for debugging purposes. 906 */ 907 *tl++ = txdr_unsigned(boottime.tv_sec); 908 *tl = txdr_unsigned(boottime.tv_usec); 909 } else { 910 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 911 nfsm_srvfillattr(&va, fp); 912 } 913 nfsm_srvdone; 914 } 915 916 /* 917 * NFS write service with write gathering support. Called when 918 * nfsrvw_procrastinate > 0. 919 * See: Chet Juszczak, "Improving the Write Performance of an NFS Server", 920 * in Proc. of the Winter 1994 Usenix Conference, pg. 247-259, San Franscisco, 921 * Jan. 1994. 922 */ 923 int 924 nfsrv_writegather(ndp, slp, procp, mrq) 925 struct nfsrv_descript **ndp; 926 struct nfssvc_sock *slp; 927 struct proc *procp; 928 struct mbuf **mrq; 929 { 930 register struct iovec *ivp; 931 register struct mbuf *mp; 932 register struct nfsrv_descript *wp, *nfsd, *owp, *swp; 933 register struct nfs_fattr *fp; 934 register int i = 0; 935 struct iovec *iov; 936 struct nfsrvw_delayhash *wpp; 937 struct ucred *cred; 938 struct vattr va, forat; 939 register u_int32_t *tl; 940 register int32_t t1; 941 caddr_t bpos, dpos; 942 int error = 0, rdonly, cache, len = 0, forat_ret = 1; 943 int ioflags, aftat_ret = 1, s, adjust, v3, zeroing; 944 char *cp2; 945 struct mbuf *mb, *mb2, *mreq, *mrep, *md; 946 struct vnode *vp; 947 struct uio io, *uiop = &io; 948 u_quad_t frev, cur_usec; 949 950 *mrq = NULL; 951 if (*ndp) { 952 nfsd = *ndp; 953 *ndp = NULL; 954 mrep = nfsd->nd_mrep; 955 md = nfsd->nd_md; 956 dpos = nfsd->nd_dpos; 957 cred = &nfsd->nd_cr; 958 v3 = (nfsd->nd_flag & ND_NFSV3); 959 LIST_INIT(&nfsd->nd_coalesce); 960 nfsd->nd_mreq = NULL; 961 nfsd->nd_stable = NFSV3WRITE_FILESYNC; 962 cur_usec = (u_quad_t)time.tv_sec * 1000000 + (u_quad_t)time.tv_usec; 963 nfsd->nd_time = cur_usec + nfsrvw_procrastinate; 964 965 /* 966 * Now, get the write header.. 967 */ 968 nfsm_srvmtofh(&nfsd->nd_fh); 969 if (v3) { 970 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 971 nfsd->nd_off = fxdr_hyper(tl); 972 tl += 3; 973 nfsd->nd_stable = fxdr_unsigned(int, *tl++); 974 } else { 975 nfsm_dissect(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 976 nfsd->nd_off = (off_t)fxdr_unsigned(u_int32_t, *++tl); 977 tl += 2; 978 } 979 len = fxdr_unsigned(int32_t, *tl); 980 nfsd->nd_len = len; 981 nfsd->nd_eoff = nfsd->nd_off + len; 982 983 /* 984 * Trim the header out of the mbuf list and trim off any trailing 985 * junk so that the mbuf list has only the write data. 986 */ 987 zeroing = 1; 988 i = 0; 989 mp = mrep; 990 while (mp) { 991 if (mp == md) { 992 zeroing = 0; 993 adjust = dpos - mtod(mp, caddr_t); 994 mp->m_len -= adjust; 995 if (mp->m_len > 0 && adjust > 0) 996 NFSMADV(mp, adjust); 997 } 998 if (zeroing) 999 mp->m_len = 0; 1000 else { 1001 i += mp->m_len; 1002 if (i > len) { 1003 mp->m_len -= (i - len); 1004 zeroing = 1; 1005 } 1006 } 1007 mp = mp->m_next; 1008 } 1009 if (len > NFS_MAXDATA || len < 0 || i < len) { 1010 nfsmout: 1011 m_freem(mrep); 1012 error = EIO; 1013 nfsm_writereply(2 * NFSX_UNSIGNED, v3); 1014 if (v3) 1015 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1016 nfsd->nd_mreq = mreq; 1017 nfsd->nd_mrep = NULL; 1018 nfsd->nd_time = 0; 1019 } 1020 1021 /* 1022 * Add this entry to the hash and time queues. 1023 */ 1024 s = splsoftclock(); 1025 owp = NULL; 1026 wp = slp->ns_tq.lh_first; 1027 while (wp && wp->nd_time < nfsd->nd_time) { 1028 owp = wp; 1029 wp = wp->nd_tq.le_next; 1030 } 1031 if (owp) { 1032 LIST_INSERT_AFTER(owp, nfsd, nd_tq); 1033 } else { 1034 LIST_INSERT_HEAD(&slp->ns_tq, nfsd, nd_tq); 1035 } 1036 if (nfsd->nd_mrep) { 1037 wpp = NWDELAYHASH(slp, nfsd->nd_fh.fh_fid.fid_data); 1038 owp = NULL; 1039 wp = wpp->lh_first; 1040 while (wp && 1041 memcmp((caddr_t)&nfsd->nd_fh, (caddr_t)&wp->nd_fh, NFSX_V3FH)) { 1042 owp = wp; 1043 wp = wp->nd_hash.le_next; 1044 } 1045 while (wp && wp->nd_off < nfsd->nd_off && 1046 !memcmp((caddr_t)&nfsd->nd_fh, (caddr_t)&wp->nd_fh, NFSX_V3FH)) { 1047 owp = wp; 1048 wp = wp->nd_hash.le_next; 1049 } 1050 if (owp) { 1051 LIST_INSERT_AFTER(owp, nfsd, nd_hash); 1052 1053 /* 1054 * Search the hash list for overlapping entries and 1055 * coalesce. 1056 */ 1057 for(; nfsd && NFSW_CONTIG(owp, nfsd); nfsd = wp) { 1058 wp = nfsd->nd_hash.le_next; 1059 if (NFSW_SAMECRED(owp, nfsd)) 1060 nfsrvw_coalesce(owp, nfsd); 1061 } 1062 } else { 1063 LIST_INSERT_HEAD(wpp, nfsd, nd_hash); 1064 } 1065 } 1066 splx(s); 1067 } 1068 1069 /* 1070 * Now, do VOP_WRITE()s for any one(s) that need to be done now 1071 * and generate the associated reply mbuf list(s). 1072 */ 1073 loop1: 1074 cur_usec = (u_quad_t)time.tv_sec * 1000000 + (u_quad_t)time.tv_usec; 1075 s = splsoftclock(); 1076 for (nfsd = slp->ns_tq.lh_first; nfsd; nfsd = owp) { 1077 owp = nfsd->nd_tq.le_next; 1078 if (nfsd->nd_time > cur_usec) 1079 break; 1080 if (nfsd->nd_mreq) 1081 continue; 1082 LIST_REMOVE(nfsd, nd_tq); 1083 LIST_REMOVE(nfsd, nd_hash); 1084 splx(s); 1085 mrep = nfsd->nd_mrep; 1086 nfsd->nd_mrep = NULL; 1087 cred = &nfsd->nd_cr; 1088 v3 = (nfsd->nd_flag & ND_NFSV3); 1089 forat_ret = aftat_ret = 1; 1090 error = nfsrv_fhtovp(&nfsd->nd_fh, 1, &vp, cred, slp, 1091 nfsd->nd_nam, &rdonly, (nfsd->nd_flag & ND_KERBAUTH), 1092 FALSE); 1093 if (!error) { 1094 if (v3) 1095 forat_ret = VOP_GETATTR(vp, &forat, cred, procp); 1096 if (vp->v_type != VREG) { 1097 if (v3) 1098 error = EINVAL; 1099 else 1100 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 1101 } 1102 } else 1103 vp = NULL; 1104 if (!error) { 1105 nqsrv_getl(vp, ND_WRITE); 1106 error = nfsrv_access(vp, VWRITE, cred, rdonly, procp, 1); 1107 } 1108 1109 if (nfsd->nd_stable == NFSV3WRITE_UNSTABLE) 1110 ioflags = IO_NODELOCKED; 1111 else if (nfsd->nd_stable == NFSV3WRITE_DATASYNC) 1112 ioflags = (IO_SYNC | IO_NODELOCKED); 1113 else 1114 ioflags = (IO_METASYNC | IO_SYNC | IO_NODELOCKED); 1115 uiop->uio_rw = UIO_WRITE; 1116 uiop->uio_segflg = UIO_SYSSPACE; 1117 uiop->uio_procp = (struct proc *)0; 1118 uiop->uio_offset = nfsd->nd_off; 1119 uiop->uio_resid = nfsd->nd_eoff - nfsd->nd_off; 1120 if (uiop->uio_resid > 0) { 1121 mp = mrep; 1122 i = 0; 1123 while (mp) { 1124 if (mp->m_len > 0) 1125 i++; 1126 mp = mp->m_next; 1127 } 1128 uiop->uio_iovcnt = i; 1129 MALLOC(iov, struct iovec *, i * sizeof (struct iovec), 1130 M_TEMP, M_WAITOK); 1131 uiop->uio_iov = ivp = iov; 1132 mp = mrep; 1133 while (mp) { 1134 if (mp->m_len > 0) { 1135 ivp->iov_base = mtod(mp, caddr_t); 1136 ivp->iov_len = mp->m_len; 1137 ivp++; 1138 } 1139 mp = mp->m_next; 1140 } 1141 if (!error) { 1142 error = VOP_WRITE(vp, uiop, ioflags, cred); 1143 nfsstats.srvvop_writes++; 1144 } 1145 FREE((caddr_t)iov, M_TEMP); 1146 } 1147 m_freem(mrep); 1148 if (vp) { 1149 aftat_ret = VOP_GETATTR(vp, &va, cred, procp); 1150 vput(vp); 1151 } 1152 1153 /* 1154 * Loop around generating replies for all write rpcs that have 1155 * now been completed. 1156 */ 1157 swp = nfsd; 1158 do { 1159 if (error) { 1160 nfsm_writereply(NFSX_WCCDATA(v3), v3); 1161 if (v3) { 1162 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1163 } 1164 } else { 1165 nfsm_writereply(NFSX_PREOPATTR(v3) + 1166 NFSX_POSTOPORFATTR(v3) + 2 * NFSX_UNSIGNED + 1167 NFSX_WRITEVERF(v3), v3); 1168 if (v3) { 1169 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1170 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1171 *tl++ = txdr_unsigned(nfsd->nd_len); 1172 *tl++ = txdr_unsigned(swp->nd_stable); 1173 /* 1174 * Actually, there is no need to txdr these fields, 1175 * but it may make the values more human readable, 1176 * for debugging purposes. 1177 */ 1178 *tl++ = txdr_unsigned(boottime.tv_sec); 1179 *tl = txdr_unsigned(boottime.tv_usec); 1180 } else { 1181 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 1182 nfsm_srvfillattr(&va, fp); 1183 } 1184 } 1185 nfsd->nd_mreq = mreq; 1186 if (nfsd->nd_mrep) 1187 panic("nfsrv_write: nd_mrep not free"); 1188 1189 /* 1190 * Done. Put it at the head of the timer queue so that 1191 * the final phase can return the reply. 1192 */ 1193 s = splsoftclock(); 1194 if (nfsd != swp) { 1195 nfsd->nd_time = 0; 1196 LIST_INSERT_HEAD(&slp->ns_tq, nfsd, nd_tq); 1197 } 1198 nfsd = swp->nd_coalesce.lh_first; 1199 if (nfsd) { 1200 LIST_REMOVE(nfsd, nd_tq); 1201 } 1202 splx(s); 1203 } while (nfsd); 1204 s = splsoftclock(); 1205 swp->nd_time = 0; 1206 LIST_INSERT_HEAD(&slp->ns_tq, swp, nd_tq); 1207 splx(s); 1208 goto loop1; 1209 } 1210 splx(s); 1211 1212 /* 1213 * Search for a reply to return. 1214 */ 1215 s = splsoftclock(); 1216 for (nfsd = slp->ns_tq.lh_first; nfsd; nfsd = nfsd->nd_tq.le_next) 1217 if (nfsd->nd_mreq) { 1218 LIST_REMOVE(nfsd, nd_tq); 1219 *mrq = nfsd->nd_mreq; 1220 *ndp = nfsd; 1221 break; 1222 } 1223 splx(s); 1224 return (0); 1225 } 1226 1227 /* 1228 * Coalesce the write request nfsd into owp. To do this we must: 1229 * - remove nfsd from the queues 1230 * - merge nfsd->nd_mrep into owp->nd_mrep 1231 * - update the nd_eoff and nd_stable for owp 1232 * - put nfsd on owp's nd_coalesce list 1233 * NB: Must be called at splsoftclock(). 1234 */ 1235 void 1236 nfsrvw_coalesce(owp, nfsd) 1237 register struct nfsrv_descript *owp; 1238 register struct nfsrv_descript *nfsd; 1239 { 1240 register int overlap; 1241 register struct mbuf *mp; 1242 1243 LIST_REMOVE(nfsd, nd_hash); 1244 LIST_REMOVE(nfsd, nd_tq); 1245 if (owp->nd_eoff < nfsd->nd_eoff) { 1246 overlap = owp->nd_eoff - nfsd->nd_off; 1247 if (overlap < 0) 1248 panic("nfsrv_coalesce: bad off"); 1249 if (overlap > 0) 1250 m_adj(nfsd->nd_mrep, overlap); 1251 mp = owp->nd_mrep; 1252 while (mp->m_next) 1253 mp = mp->m_next; 1254 mp->m_next = nfsd->nd_mrep; 1255 owp->nd_eoff = nfsd->nd_eoff; 1256 } else 1257 m_freem(nfsd->nd_mrep); 1258 nfsd->nd_mrep = NULL; 1259 if (nfsd->nd_stable == NFSV3WRITE_FILESYNC) 1260 owp->nd_stable = NFSV3WRITE_FILESYNC; 1261 else if (nfsd->nd_stable == NFSV3WRITE_DATASYNC && 1262 owp->nd_stable == NFSV3WRITE_UNSTABLE) 1263 owp->nd_stable = NFSV3WRITE_DATASYNC; 1264 LIST_INSERT_HEAD(&owp->nd_coalesce, nfsd, nd_tq); 1265 /* 1266 * nfsd might hold coalesce elements! Move them to owp. 1267 * Otherwise, requests may be lost and clients will be stuck. 1268 */ 1269 if (nfsd->nd_coalesce.lh_first) 1270 { 1271 register struct nfsrv_descript *m; 1272 1273 while ((m = nfsd->nd_coalesce.lh_first)) 1274 { 1275 LIST_REMOVE(m, nd_tq); 1276 LIST_INSERT_HEAD(&owp->nd_coalesce, m, nd_tq); 1277 } 1278 } 1279 } 1280 1281 /* 1282 * nfs create service 1283 * now does a truncate to 0 length via. setattr if it already exists 1284 */ 1285 int 1286 nfsrv_create(nfsd, slp, procp, mrq) 1287 struct nfsrv_descript *nfsd; 1288 struct nfssvc_sock *slp; 1289 struct proc *procp; 1290 struct mbuf **mrq; 1291 { 1292 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1293 struct mbuf *nam = nfsd->nd_nam; 1294 caddr_t dpos = nfsd->nd_dpos; 1295 struct ucred *cred = &nfsd->nd_cr; 1296 register struct nfs_fattr *fp; 1297 struct vattr va, dirfor, diraft; 1298 register struct nfsv2_sattr *sp; 1299 register u_int32_t *tl; 1300 struct nameidata nd; 1301 register caddr_t cp; 1302 register int32_t t1; 1303 caddr_t bpos; 1304 int error = 0, cache, len, tsize, dirfor_ret = 1, diraft_ret = 1; 1305 int rdev = 0; 1306 int v3 = (nfsd->nd_flag & ND_NFSV3), how, exclusive_flag = 0; 1307 char *cp2; 1308 struct mbuf *mb, *mb2, *mreq; 1309 struct vnode *vp = NULL, *dirp = NULL; 1310 nfsfh_t nfh; 1311 fhandle_t *fhp; 1312 u_quad_t frev, tempsize; 1313 u_char cverf[NFSX_V3CREATEVERF]; 1314 1315 nd.ni_cnd.cn_nameiop = 0; 1316 fhp = &nfh.fh_generic; 1317 nfsm_srvmtofh(fhp); 1318 nfsm_srvnamesiz(len); 1319 nd.ni_cnd.cn_cred = cred; 1320 nd.ni_cnd.cn_nameiop = CREATE; 1321 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF | SAVESTART; 1322 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 1323 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1324 if (dirp) { 1325 if (v3) 1326 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 1327 procp); 1328 else { 1329 vrele(dirp); 1330 dirp = (struct vnode *)0; 1331 } 1332 } 1333 if (error) { 1334 nfsm_reply(NFSX_WCCDATA(v3)); 1335 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1336 if (dirp) 1337 vrele(dirp); 1338 return (0); 1339 } 1340 VATTR_NULL(&va); 1341 if (v3) { 1342 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1343 how = fxdr_unsigned(int, *tl); 1344 switch (how) { 1345 case NFSV3CREATE_GUARDED: 1346 if (nd.ni_vp) { 1347 error = EEXIST; 1348 break; 1349 } 1350 case NFSV3CREATE_UNCHECKED: 1351 nfsm_srvsattr(&va); 1352 break; 1353 case NFSV3CREATE_EXCLUSIVE: 1354 nfsm_dissect(cp, caddr_t, NFSX_V3CREATEVERF); 1355 memcpy(cverf, cp, NFSX_V3CREATEVERF); 1356 exclusive_flag = 1; 1357 if (nd.ni_vp == NULL) 1358 va.va_mode = 0; 1359 break; 1360 }; 1361 va.va_type = VREG; 1362 } else { 1363 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1364 va.va_type = IFTOVT(fxdr_unsigned(u_int32_t, sp->sa_mode)); 1365 if (va.va_type == VNON) 1366 va.va_type = VREG; 1367 va.va_mode = nfstov_mode(sp->sa_mode); 1368 switch (va.va_type) { 1369 case VREG: 1370 tsize = fxdr_unsigned(int32_t, sp->sa_size); 1371 if (tsize != -1) 1372 va.va_size = (u_quad_t)tsize; 1373 break; 1374 case VCHR: 1375 case VBLK: 1376 case VFIFO: 1377 rdev = fxdr_unsigned(int32_t, sp->sa_size); 1378 break; 1379 default: 1380 break; 1381 }; 1382 } 1383 1384 /* 1385 * Iff doesn't exist, create it 1386 * otherwise just truncate to 0 length 1387 * should I set the mode too ?? 1388 */ 1389 if (nd.ni_vp == NULL) { 1390 if (va.va_type == VREG || va.va_type == VSOCK) { 1391 vrele(nd.ni_startdir); 1392 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1393 error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1394 if (!error) { 1395 FREE(nd.ni_cnd.cn_pnbuf, M_NAMEI); 1396 if (exclusive_flag) { 1397 exclusive_flag = 0; 1398 VATTR_NULL(&va); 1399 memcpy((caddr_t)&va.va_atime, cverf, 1400 NFSX_V3CREATEVERF); 1401 error = VOP_SETATTR(nd.ni_vp, &va, cred, 1402 procp); 1403 } 1404 } 1405 } else if (va.va_type == VCHR || va.va_type == VBLK || 1406 va.va_type == VFIFO) { 1407 if (va.va_type == VCHR && rdev == 0xffffffff) 1408 va.va_type = VFIFO; 1409 if (va.va_type != VFIFO && 1410 (error = suser(cred, (u_short *)0))) { 1411 vrele(nd.ni_startdir); 1412 free(nd.ni_cnd.cn_pnbuf, M_NAMEI); 1413 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1414 vput(nd.ni_dvp); 1415 nfsm_reply(0); 1416 return (error); 1417 } else 1418 va.va_rdev = (dev_t)rdev; 1419 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1420 error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, 1421 &va); 1422 if (error) { 1423 vrele(nd.ni_startdir); 1424 nfsm_reply(0); 1425 } 1426 nd.ni_cnd.cn_nameiop = LOOKUP; 1427 nd.ni_cnd.cn_flags &= ~(LOCKPARENT | SAVESTART); 1428 nd.ni_cnd.cn_proc = procp; 1429 nd.ni_cnd.cn_cred = cred; 1430 if ((error = lookup(&nd)) != 0) { 1431 free(nd.ni_cnd.cn_pnbuf, M_NAMEI); 1432 nfsm_reply(0); 1433 } 1434 FREE(nd.ni_cnd.cn_pnbuf, M_NAMEI); 1435 if (nd.ni_cnd.cn_flags & ISSYMLINK) { 1436 vrele(nd.ni_dvp); 1437 vput(nd.ni_vp); 1438 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1439 error = EINVAL; 1440 nfsm_reply(0); 1441 } 1442 } else { 1443 vrele(nd.ni_startdir); 1444 free(nd.ni_cnd.cn_pnbuf, M_NAMEI); 1445 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1446 vput(nd.ni_dvp); 1447 error = ENXIO; 1448 } 1449 vp = nd.ni_vp; 1450 } else { 1451 vrele(nd.ni_startdir); 1452 free(nd.ni_cnd.cn_pnbuf, M_NAMEI); 1453 vp = nd.ni_vp; 1454 if (nd.ni_dvp == vp) 1455 vrele(nd.ni_dvp); 1456 else 1457 vput(nd.ni_dvp); 1458 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1459 if (!error && va.va_size != -1) { 1460 error = nfsrv_access(vp, VWRITE, cred, 1461 (nd.ni_cnd.cn_flags & RDONLY), procp, 0); 1462 if (!error) { 1463 nqsrv_getl(vp, ND_WRITE); 1464 tempsize = va.va_size; 1465 VATTR_NULL(&va); 1466 va.va_size = tempsize; 1467 error = VOP_SETATTR(vp, &va, cred, 1468 procp); 1469 } 1470 } 1471 if (error) 1472 vput(vp); 1473 } 1474 if (!error) { 1475 memset((caddr_t)fhp, 0, sizeof(nfh)); 1476 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; 1477 error = VFS_VPTOFH(vp, &fhp->fh_fid); 1478 if (!error) 1479 error = VOP_GETATTR(vp, &va, cred, procp); 1480 vput(vp); 1481 } 1482 if (v3) { 1483 if (exclusive_flag && !error && 1484 memcmp(cverf, (caddr_t)&va.va_atime, NFSX_V3CREATEVERF)) 1485 error = EEXIST; 1486 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 1487 vrele(dirp); 1488 } 1489 nfsm_reply(NFSX_SRVFH(v3) + NFSX_FATTR(v3) + NFSX_WCCDATA(v3)); 1490 if (v3) { 1491 if (!error) { 1492 nfsm_srvpostop_fh(fhp); 1493 nfsm_srvpostop_attr(0, &va); 1494 } 1495 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1496 } else { 1497 nfsm_srvfhtom(fhp, v3); 1498 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 1499 nfsm_srvfillattr(&va, fp); 1500 } 1501 return (0); 1502 nfsmout: 1503 if (dirp) 1504 vrele(dirp); 1505 if (nd.ni_cnd.cn_nameiop) { 1506 vrele(nd.ni_startdir); 1507 free((caddr_t)nd.ni_cnd.cn_pnbuf, M_NAMEI); 1508 } 1509 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1510 if (nd.ni_dvp == nd.ni_vp) 1511 vrele(nd.ni_dvp); 1512 else 1513 vput(nd.ni_dvp); 1514 if (nd.ni_vp) 1515 vput(nd.ni_vp); 1516 return (error); 1517 } 1518 1519 /* 1520 * nfs v3 mknod service 1521 */ 1522 int 1523 nfsrv_mknod(nfsd, slp, procp, mrq) 1524 struct nfsrv_descript *nfsd; 1525 struct nfssvc_sock *slp; 1526 struct proc *procp; 1527 struct mbuf **mrq; 1528 { 1529 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1530 struct mbuf *nam = nfsd->nd_nam; 1531 caddr_t dpos = nfsd->nd_dpos; 1532 struct ucred *cred = &nfsd->nd_cr; 1533 struct vattr va, dirfor, diraft; 1534 register u_int32_t *tl; 1535 struct nameidata nd; 1536 register int32_t t1; 1537 caddr_t bpos; 1538 int error = 0, cache, len, dirfor_ret = 1, diraft_ret = 1; 1539 u_int32_t major, minor; 1540 enum vtype vtyp; 1541 char *cp2; 1542 struct mbuf *mb, *mb2, *mreq; 1543 struct vnode *vp, *dirp = (struct vnode *)0; 1544 nfsfh_t nfh; 1545 fhandle_t *fhp; 1546 u_quad_t frev; 1547 1548 nd.ni_cnd.cn_nameiop = 0; 1549 fhp = &nfh.fh_generic; 1550 nfsm_srvmtofh(fhp); 1551 nfsm_srvnamesiz(len); 1552 nd.ni_cnd.cn_cred = cred; 1553 nd.ni_cnd.cn_nameiop = CREATE; 1554 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF | SAVESTART; 1555 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 1556 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1557 if (dirp) 1558 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, procp); 1559 if (error) { 1560 nfsm_reply(NFSX_WCCDATA(1)); 1561 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1562 if (dirp) 1563 vrele(dirp); 1564 return (0); 1565 } 1566 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1567 vtyp = nfsv3tov_type(*tl); 1568 if (vtyp != VCHR && vtyp != VBLK && vtyp != VSOCK && vtyp != VFIFO) { 1569 vrele(nd.ni_startdir); 1570 free((caddr_t)nd.ni_cnd.cn_pnbuf, M_NAMEI); 1571 error = NFSERR_BADTYPE; 1572 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1573 vput(nd.ni_dvp); 1574 goto out; 1575 } 1576 VATTR_NULL(&va); 1577 nfsm_srvsattr(&va); 1578 if (vtyp == VCHR || vtyp == VBLK) { 1579 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1580 major = fxdr_unsigned(u_int32_t, *tl++); 1581 minor = fxdr_unsigned(u_int32_t, *tl); 1582 va.va_rdev = makedev(major, minor); 1583 } 1584 1585 /* 1586 * Iff doesn't exist, create it. 1587 */ 1588 if (nd.ni_vp) { 1589 vrele(nd.ni_startdir); 1590 free((caddr_t)nd.ni_cnd.cn_pnbuf, M_NAMEI); 1591 error = EEXIST; 1592 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1593 vput(nd.ni_dvp); 1594 goto out; 1595 } 1596 va.va_type = vtyp; 1597 if (vtyp == VSOCK) { 1598 vrele(nd.ni_startdir); 1599 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1600 error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1601 if (!error) 1602 FREE(nd.ni_cnd.cn_pnbuf, M_NAMEI); 1603 } else { 1604 if (va.va_type != VFIFO && 1605 (error = suser(cred, (u_short *)0))) { 1606 vrele(nd.ni_startdir); 1607 free((caddr_t)nd.ni_cnd.cn_pnbuf, M_NAMEI); 1608 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1609 vput(nd.ni_dvp); 1610 goto out; 1611 } 1612 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1613 error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1614 if (error) { 1615 vrele(nd.ni_startdir); 1616 goto out; 1617 } 1618 nd.ni_cnd.cn_nameiop = LOOKUP; 1619 nd.ni_cnd.cn_flags &= ~(LOCKPARENT | SAVESTART); 1620 nd.ni_cnd.cn_proc = procp; 1621 nd.ni_cnd.cn_cred = procp->p_ucred; 1622 error = lookup(&nd); 1623 FREE(nd.ni_cnd.cn_pnbuf, M_NAMEI); 1624 if (error) 1625 goto out; 1626 if (nd.ni_cnd.cn_flags & ISSYMLINK) { 1627 vrele(nd.ni_dvp); 1628 vput(nd.ni_vp); 1629 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1630 error = EINVAL; 1631 } 1632 } 1633 out: 1634 vp = nd.ni_vp; 1635 if (!error) { 1636 memset((caddr_t)fhp, 0, sizeof(nfh)); 1637 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; 1638 error = VFS_VPTOFH(vp, &fhp->fh_fid); 1639 if (!error) 1640 error = VOP_GETATTR(vp, &va, cred, procp); 1641 vput(vp); 1642 } 1643 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 1644 vrele(dirp); 1645 nfsm_reply(NFSX_SRVFH(1) + NFSX_POSTOPATTR(1) + NFSX_WCCDATA(1)); 1646 if (!error) { 1647 nfsm_srvpostop_fh(fhp); 1648 nfsm_srvpostop_attr(0, &va); 1649 } 1650 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1651 return (0); 1652 nfsmout: 1653 if (dirp) 1654 vrele(dirp); 1655 if (nd.ni_cnd.cn_nameiop) { 1656 vrele(nd.ni_startdir); 1657 free((caddr_t)nd.ni_cnd.cn_pnbuf, M_NAMEI); 1658 } 1659 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1660 if (nd.ni_dvp == nd.ni_vp) 1661 vrele(nd.ni_dvp); 1662 else 1663 vput(nd.ni_dvp); 1664 if (nd.ni_vp) 1665 vput(nd.ni_vp); 1666 return (error); 1667 } 1668 1669 /* 1670 * nfs remove service 1671 */ 1672 int 1673 nfsrv_remove(nfsd, slp, procp, mrq) 1674 struct nfsrv_descript *nfsd; 1675 struct nfssvc_sock *slp; 1676 struct proc *procp; 1677 struct mbuf **mrq; 1678 { 1679 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1680 struct mbuf *nam = nfsd->nd_nam; 1681 caddr_t dpos = nfsd->nd_dpos; 1682 struct ucred *cred = &nfsd->nd_cr; 1683 struct nameidata nd; 1684 register u_int32_t *tl; 1685 register int32_t t1; 1686 caddr_t bpos; 1687 int error = 0, cache, len, dirfor_ret = 1, diraft_ret = 1; 1688 int v3 = (nfsd->nd_flag & ND_NFSV3); 1689 char *cp2; 1690 struct mbuf *mb, *mreq; 1691 struct vnode *vp, *dirp; 1692 struct vattr dirfor, diraft; 1693 nfsfh_t nfh; 1694 fhandle_t *fhp; 1695 u_quad_t frev; 1696 1697 #ifndef nolint 1698 vp = (struct vnode *)0; 1699 #endif 1700 fhp = &nfh.fh_generic; 1701 nfsm_srvmtofh(fhp); 1702 nfsm_srvnamesiz(len); 1703 nd.ni_cnd.cn_cred = cred; 1704 nd.ni_cnd.cn_nameiop = DELETE; 1705 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 1706 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 1707 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1708 if (dirp) { 1709 if (v3) 1710 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 1711 procp); 1712 else 1713 vrele(dirp); 1714 } 1715 if (!error) { 1716 vp = nd.ni_vp; 1717 if (vp->v_type == VDIR && 1718 (error = suser(cred, (u_short *)0)) != 0) 1719 goto out; 1720 /* 1721 * The root of a mounted filesystem cannot be deleted. 1722 */ 1723 if (vp->v_flag & VROOT) { 1724 error = EBUSY; 1725 goto out; 1726 } 1727 out: 1728 if (!error) { 1729 (void)uvm_vnp_uncache(vp); 1730 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1731 nqsrv_getl(vp, ND_WRITE); 1732 error = VOP_REMOVE(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); 1733 } else { 1734 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1735 if (nd.ni_dvp == vp) 1736 vrele(nd.ni_dvp); 1737 else 1738 vput(nd.ni_dvp); 1739 vput(vp); 1740 } 1741 } 1742 if (dirp && v3) { 1743 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 1744 vrele(dirp); 1745 } 1746 nfsm_reply(NFSX_WCCDATA(v3)); 1747 if (v3) { 1748 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1749 return (0); 1750 } 1751 nfsm_srvdone; 1752 } 1753 1754 /* 1755 * nfs rename service 1756 */ 1757 int 1758 nfsrv_rename(nfsd, slp, procp, mrq) 1759 struct nfsrv_descript *nfsd; 1760 struct nfssvc_sock *slp; 1761 struct proc *procp; 1762 struct mbuf **mrq; 1763 { 1764 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1765 struct mbuf *nam = nfsd->nd_nam; 1766 caddr_t dpos = nfsd->nd_dpos; 1767 struct ucred *cred = &nfsd->nd_cr; 1768 register u_int32_t *tl; 1769 register int32_t t1; 1770 caddr_t bpos; 1771 int error = 0, cache, len, len2, fdirfor_ret = 1, fdiraft_ret = 1; 1772 int tdirfor_ret = 1, tdiraft_ret = 1; 1773 int v3 = (nfsd->nd_flag & ND_NFSV3); 1774 char *cp2; 1775 struct mbuf *mb, *mreq; 1776 struct nameidata fromnd, tond; 1777 struct vnode *fvp, *tvp, *tdvp, *fdirp = (struct vnode *)0; 1778 struct vnode *tdirp = (struct vnode *)0; 1779 struct vattr fdirfor, fdiraft, tdirfor, tdiraft; 1780 nfsfh_t fnfh, tnfh; 1781 fhandle_t *ffhp, *tfhp; 1782 u_quad_t frev; 1783 uid_t saved_uid; 1784 1785 #ifndef nolint 1786 fvp = (struct vnode *)0; 1787 #endif 1788 ffhp = &fnfh.fh_generic; 1789 tfhp = &tnfh.fh_generic; 1790 fromnd.ni_cnd.cn_nameiop = 0; 1791 tond.ni_cnd.cn_nameiop = 0; 1792 nfsm_srvmtofh(ffhp); 1793 nfsm_srvnamesiz(len); 1794 /* 1795 * Remember our original uid so that we can reset cr_uid before 1796 * the second nfs_namei() call, in case it is remapped. 1797 */ 1798 saved_uid = cred->cr_uid; 1799 fromnd.ni_cnd.cn_cred = cred; 1800 fromnd.ni_cnd.cn_nameiop = DELETE; 1801 fromnd.ni_cnd.cn_flags = WANTPARENT | SAVESTART; 1802 error = nfs_namei(&fromnd, ffhp, len, slp, nam, &md, 1803 &dpos, &fdirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1804 if (fdirp) { 1805 if (v3) 1806 fdirfor_ret = VOP_GETATTR(fdirp, &fdirfor, cred, 1807 procp); 1808 else { 1809 vrele(fdirp); 1810 fdirp = (struct vnode *)0; 1811 } 1812 } 1813 if (error) { 1814 nfsm_reply(2 * NFSX_WCCDATA(v3)); 1815 nfsm_srvwcc_data(fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft); 1816 nfsm_srvwcc_data(tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft); 1817 if (fdirp) 1818 vrele(fdirp); 1819 return (0); 1820 } 1821 fvp = fromnd.ni_vp; 1822 nfsm_srvmtofh(tfhp); 1823 nfsm_strsiz(len2, NFS_MAXNAMLEN); 1824 cred->cr_uid = saved_uid; 1825 tond.ni_cnd.cn_cred = cred; 1826 tond.ni_cnd.cn_nameiop = RENAME; 1827 tond.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF | NOCACHE | SAVESTART; 1828 error = nfs_namei(&tond, tfhp, len2, slp, nam, &md, 1829 &dpos, &tdirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1830 if (tdirp) { 1831 if (v3) 1832 tdirfor_ret = VOP_GETATTR(tdirp, &tdirfor, cred, 1833 procp); 1834 else { 1835 vrele(tdirp); 1836 tdirp = (struct vnode *)0; 1837 } 1838 } 1839 if (error) { 1840 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 1841 vrele(fromnd.ni_dvp); 1842 vrele(fvp); 1843 goto out1; 1844 } 1845 tdvp = tond.ni_dvp; 1846 tvp = tond.ni_vp; 1847 if (tvp != NULL) { 1848 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 1849 if (v3) 1850 error = EEXIST; 1851 else 1852 error = EISDIR; 1853 goto out; 1854 } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 1855 if (v3) 1856 error = EEXIST; 1857 else 1858 error = ENOTDIR; 1859 goto out; 1860 } 1861 if (tvp->v_type == VDIR && tvp->v_mountedhere) { 1862 if (v3) 1863 error = EXDEV; 1864 else 1865 error = ENOTEMPTY; 1866 goto out; 1867 } 1868 } 1869 if (fvp->v_type == VDIR && fvp->v_mountedhere) { 1870 if (v3) 1871 error = EXDEV; 1872 else 1873 error = ENOTEMPTY; 1874 goto out; 1875 } 1876 if (fvp->v_mount != tdvp->v_mount) { 1877 if (v3) 1878 error = EXDEV; 1879 else 1880 error = ENOTEMPTY; 1881 goto out; 1882 } 1883 if (fvp == tdvp) { 1884 if (v3) 1885 error = EINVAL; 1886 else 1887 error = ENOTEMPTY; 1888 } 1889 /* 1890 * If source is the same as the destination (that is the 1891 * same vnode with the same name in the same directory), 1892 * then there is nothing to do. 1893 */ 1894 if (fvp == tvp && fromnd.ni_dvp == tdvp && 1895 fromnd.ni_cnd.cn_namelen == tond.ni_cnd.cn_namelen && 1896 !memcmp(fromnd.ni_cnd.cn_nameptr, tond.ni_cnd.cn_nameptr, 1897 fromnd.ni_cnd.cn_namelen)) 1898 error = -1; 1899 out: 1900 if (!error) { 1901 nqsrv_getl(fromnd.ni_dvp, ND_WRITE); 1902 nqsrv_getl(tdvp, ND_WRITE); 1903 if (tvp) { 1904 (void)uvm_vnp_uncache(tvp); 1905 nqsrv_getl(tvp, ND_WRITE); 1906 } 1907 error = VOP_RENAME(fromnd.ni_dvp, fromnd.ni_vp, &fromnd.ni_cnd, 1908 tond.ni_dvp, tond.ni_vp, &tond.ni_cnd); 1909 } else { 1910 VOP_ABORTOP(tond.ni_dvp, &tond.ni_cnd); 1911 if (tdvp == tvp) 1912 vrele(tdvp); 1913 else 1914 vput(tdvp); 1915 if (tvp) 1916 vput(tvp); 1917 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 1918 vrele(fromnd.ni_dvp); 1919 vrele(fvp); 1920 if (error == -1) 1921 error = 0; 1922 } 1923 vrele(tond.ni_startdir); 1924 FREE(tond.ni_cnd.cn_pnbuf, M_NAMEI); 1925 out1: 1926 if (fdirp) { 1927 fdiraft_ret = VOP_GETATTR(fdirp, &fdiraft, cred, procp); 1928 vrele(fdirp); 1929 } 1930 if (tdirp) { 1931 tdiraft_ret = VOP_GETATTR(tdirp, &tdiraft, cred, procp); 1932 vrele(tdirp); 1933 } 1934 vrele(fromnd.ni_startdir); 1935 FREE(fromnd.ni_cnd.cn_pnbuf, M_NAMEI); 1936 nfsm_reply(2 * NFSX_WCCDATA(v3)); 1937 if (v3) { 1938 nfsm_srvwcc_data(fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft); 1939 nfsm_srvwcc_data(tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft); 1940 } 1941 return (0); 1942 1943 nfsmout: 1944 if (fdirp) 1945 vrele(fdirp); 1946 if (tdirp) 1947 vrele(tdirp); 1948 if (tond.ni_cnd.cn_nameiop) { 1949 vrele(tond.ni_startdir); 1950 FREE(tond.ni_cnd.cn_pnbuf, M_NAMEI); 1951 } 1952 if (fromnd.ni_cnd.cn_nameiop) { 1953 vrele(fromnd.ni_startdir); 1954 FREE(fromnd.ni_cnd.cn_pnbuf, M_NAMEI); 1955 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 1956 vrele(fromnd.ni_dvp); 1957 vrele(fvp); 1958 } 1959 return (error); 1960 } 1961 1962 /* 1963 * nfs link service 1964 */ 1965 int 1966 nfsrv_link(nfsd, slp, procp, mrq) 1967 struct nfsrv_descript *nfsd; 1968 struct nfssvc_sock *slp; 1969 struct proc *procp; 1970 struct mbuf **mrq; 1971 { 1972 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1973 struct mbuf *nam = nfsd->nd_nam; 1974 caddr_t dpos = nfsd->nd_dpos; 1975 struct ucred *cred = &nfsd->nd_cr; 1976 struct nameidata nd; 1977 register u_int32_t *tl; 1978 register int32_t t1; 1979 caddr_t bpos; 1980 int error = 0, rdonly, cache, len, dirfor_ret = 1, diraft_ret = 1; 1981 int getret = 1, v3 = (nfsd->nd_flag & ND_NFSV3); 1982 char *cp2; 1983 struct mbuf *mb, *mreq; 1984 struct vnode *vp, *xp, *dirp = (struct vnode *)0; 1985 struct vattr dirfor, diraft, at; 1986 nfsfh_t nfh, dnfh; 1987 fhandle_t *fhp, *dfhp; 1988 u_quad_t frev; 1989 1990 fhp = &nfh.fh_generic; 1991 dfhp = &dnfh.fh_generic; 1992 nfsm_srvmtofh(fhp); 1993 nfsm_srvmtofh(dfhp); 1994 nfsm_srvnamesiz(len); 1995 error = nfsrv_fhtovp(fhp, FALSE, &vp, cred, slp, nam, 1996 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1997 if (error) { 1998 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 1999 nfsm_srvpostop_attr(getret, &at); 2000 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2001 return (0); 2002 } 2003 if (vp->v_type == VDIR && (error = suser(cred, (u_short *)0)) != 0) 2004 goto out1; 2005 nd.ni_cnd.cn_cred = cred; 2006 nd.ni_cnd.cn_nameiop = CREATE; 2007 nd.ni_cnd.cn_flags = LOCKPARENT; 2008 error = nfs_namei(&nd, dfhp, len, slp, nam, &md, &dpos, 2009 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2010 if (dirp) { 2011 if (v3) 2012 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 2013 procp); 2014 else { 2015 vrele(dirp); 2016 dirp = (struct vnode *)0; 2017 } 2018 } 2019 if (error) 2020 goto out1; 2021 xp = nd.ni_vp; 2022 if (xp != NULL) { 2023 error = EEXIST; 2024 goto out; 2025 } 2026 xp = nd.ni_dvp; 2027 if (vp->v_mount != xp->v_mount) 2028 error = EXDEV; 2029 out: 2030 if (!error) { 2031 nqsrv_getl(vp, ND_WRITE); 2032 nqsrv_getl(xp, ND_WRITE); 2033 error = VOP_LINK(nd.ni_dvp, vp, &nd.ni_cnd); 2034 } else { 2035 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2036 if (nd.ni_dvp == nd.ni_vp) 2037 vrele(nd.ni_dvp); 2038 else 2039 vput(nd.ni_dvp); 2040 if (nd.ni_vp) 2041 vrele(nd.ni_vp); 2042 } 2043 out1: 2044 if (v3) 2045 getret = VOP_GETATTR(vp, &at, cred, procp); 2046 if (dirp) { 2047 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 2048 vrele(dirp); 2049 } 2050 vrele(vp); 2051 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2052 if (v3) { 2053 nfsm_srvpostop_attr(getret, &at); 2054 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2055 return (0); 2056 } 2057 nfsm_srvdone; 2058 } 2059 2060 /* 2061 * nfs symbolic link service 2062 */ 2063 int 2064 nfsrv_symlink(nfsd, slp, procp, mrq) 2065 struct nfsrv_descript *nfsd; 2066 struct nfssvc_sock *slp; 2067 struct proc *procp; 2068 struct mbuf **mrq; 2069 { 2070 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2071 struct mbuf *nam = nfsd->nd_nam; 2072 caddr_t dpos = nfsd->nd_dpos; 2073 struct ucred *cred = &nfsd->nd_cr; 2074 struct vattr va, dirfor, diraft; 2075 struct nameidata nd; 2076 register u_int32_t *tl; 2077 register int32_t t1; 2078 struct nfsv2_sattr *sp; 2079 char *bpos, *pathcp = NULL, *cp2; 2080 struct uio io; 2081 struct iovec iv; 2082 int error = 0, cache, len, len2, dirfor_ret = 1, diraft_ret = 1; 2083 int v3 = (nfsd->nd_flag & ND_NFSV3); 2084 struct mbuf *mb, *mreq, *mb2; 2085 struct vnode *dirp = (struct vnode *)0; 2086 nfsfh_t nfh; 2087 fhandle_t *fhp; 2088 u_quad_t frev; 2089 2090 nd.ni_cnd.cn_nameiop = 0; 2091 fhp = &nfh.fh_generic; 2092 nfsm_srvmtofh(fhp); 2093 nfsm_srvnamesiz(len); 2094 nd.ni_cnd.cn_cred = cred; 2095 nd.ni_cnd.cn_nameiop = CREATE; 2096 nd.ni_cnd.cn_flags = LOCKPARENT | SAVESTART; 2097 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 2098 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2099 if (dirp) { 2100 if (v3) 2101 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 2102 procp); 2103 else { 2104 vrele(dirp); 2105 dirp = (struct vnode *)0; 2106 } 2107 } 2108 if (error) 2109 goto out; 2110 VATTR_NULL(&va); 2111 if (v3) 2112 nfsm_srvsattr(&va); 2113 nfsm_strsiz(len2, NFS_MAXPATHLEN); 2114 MALLOC(pathcp, caddr_t, len2 + 1, M_TEMP, M_WAITOK); 2115 iv.iov_base = pathcp; 2116 iv.iov_len = len2; 2117 io.uio_resid = len2; 2118 io.uio_offset = 0; 2119 io.uio_iov = &iv; 2120 io.uio_iovcnt = 1; 2121 io.uio_segflg = UIO_SYSSPACE; 2122 io.uio_rw = UIO_READ; 2123 io.uio_procp = (struct proc *)0; 2124 nfsm_mtouio(&io, len2); 2125 if (!v3) { 2126 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2127 va.va_mode = fxdr_unsigned(u_int16_t, sp->sa_mode); 2128 } 2129 *(pathcp + len2) = '\0'; 2130 if (nd.ni_vp) { 2131 vrele(nd.ni_startdir); 2132 free(nd.ni_cnd.cn_pnbuf, M_NAMEI); 2133 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2134 if (nd.ni_dvp == nd.ni_vp) 2135 vrele(nd.ni_dvp); 2136 else 2137 vput(nd.ni_dvp); 2138 vrele(nd.ni_vp); 2139 error = EEXIST; 2140 goto out; 2141 } 2142 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2143 error = VOP_SYMLINK(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va, pathcp); 2144 if (error) 2145 vrele(nd.ni_startdir); 2146 else { 2147 if (v3) { 2148 nd.ni_cnd.cn_nameiop = LOOKUP; 2149 nd.ni_cnd.cn_flags &= ~(LOCKPARENT | SAVESTART | FOLLOW); 2150 nd.ni_cnd.cn_flags |= (NOFOLLOW | LOCKLEAF); 2151 nd.ni_cnd.cn_proc = procp; 2152 nd.ni_cnd.cn_cred = cred; 2153 error = lookup(&nd); 2154 if (!error) { 2155 memset((caddr_t)fhp, 0, sizeof(nfh)); 2156 fhp->fh_fsid = nd.ni_vp->v_mount->mnt_stat.f_fsid; 2157 error = VFS_VPTOFH(nd.ni_vp, &fhp->fh_fid); 2158 if (!error) 2159 error = VOP_GETATTR(nd.ni_vp, &va, cred, 2160 procp); 2161 vput(nd.ni_vp); 2162 } 2163 } else 2164 vrele(nd.ni_startdir); 2165 FREE(nd.ni_cnd.cn_pnbuf, M_NAMEI); 2166 } 2167 out: 2168 if (pathcp) 2169 FREE(pathcp, M_TEMP); 2170 if (dirp) { 2171 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 2172 vrele(dirp); 2173 } 2174 nfsm_reply(NFSX_SRVFH(v3) + NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2175 if (v3) { 2176 if (!error) { 2177 nfsm_srvpostop_fh(fhp); 2178 nfsm_srvpostop_attr(0, &va); 2179 } 2180 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2181 } 2182 return (0); 2183 nfsmout: 2184 if (nd.ni_cnd.cn_nameiop) { 2185 vrele(nd.ni_startdir); 2186 free(nd.ni_cnd.cn_pnbuf, M_NAMEI); 2187 } 2188 if (dirp) 2189 vrele(dirp); 2190 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2191 if (nd.ni_dvp == nd.ni_vp) 2192 vrele(nd.ni_dvp); 2193 else 2194 vput(nd.ni_dvp); 2195 if (nd.ni_vp) 2196 vrele(nd.ni_vp); 2197 if (pathcp) 2198 FREE(pathcp, M_TEMP); 2199 return (error); 2200 } 2201 2202 /* 2203 * nfs mkdir service 2204 */ 2205 int 2206 nfsrv_mkdir(nfsd, slp, procp, mrq) 2207 struct nfsrv_descript *nfsd; 2208 struct nfssvc_sock *slp; 2209 struct proc *procp; 2210 struct mbuf **mrq; 2211 { 2212 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2213 struct mbuf *nam = nfsd->nd_nam; 2214 caddr_t dpos = nfsd->nd_dpos; 2215 struct ucred *cred = &nfsd->nd_cr; 2216 struct vattr va, dirfor, diraft; 2217 register struct nfs_fattr *fp; 2218 struct nameidata nd; 2219 register caddr_t cp; 2220 register u_int32_t *tl; 2221 register int32_t t1; 2222 caddr_t bpos; 2223 int error = 0, cache, len, dirfor_ret = 1, diraft_ret = 1; 2224 int v3 = (nfsd->nd_flag & ND_NFSV3); 2225 char *cp2; 2226 struct mbuf *mb, *mb2, *mreq; 2227 struct vnode *vp, *dirp = (struct vnode *)0; 2228 nfsfh_t nfh; 2229 fhandle_t *fhp; 2230 u_quad_t frev; 2231 2232 fhp = &nfh.fh_generic; 2233 nfsm_srvmtofh(fhp); 2234 nfsm_srvnamesiz(len); 2235 nd.ni_cnd.cn_cred = cred; 2236 nd.ni_cnd.cn_nameiop = CREATE; 2237 nd.ni_cnd.cn_flags = LOCKPARENT; 2238 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 2239 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2240 if (dirp) { 2241 if (v3) 2242 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 2243 procp); 2244 else { 2245 vrele(dirp); 2246 dirp = (struct vnode *)0; 2247 } 2248 } 2249 if (error) { 2250 nfsm_reply(NFSX_WCCDATA(v3)); 2251 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2252 if (dirp) 2253 vrele(dirp); 2254 return (0); 2255 } 2256 VATTR_NULL(&va); 2257 if (v3) { 2258 nfsm_srvsattr(&va); 2259 } else { 2260 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2261 va.va_mode = nfstov_mode(*tl++); 2262 } 2263 va.va_type = VDIR; 2264 vp = nd.ni_vp; 2265 if (vp != NULL) { 2266 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2267 if (nd.ni_dvp == vp) 2268 vrele(nd.ni_dvp); 2269 else 2270 vput(nd.ni_dvp); 2271 vrele(vp); 2272 error = EEXIST; 2273 goto out; 2274 } 2275 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2276 error = VOP_MKDIR(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 2277 if (!error) { 2278 vp = nd.ni_vp; 2279 memset((caddr_t)fhp, 0, sizeof(nfh)); 2280 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; 2281 error = VFS_VPTOFH(vp, &fhp->fh_fid); 2282 if (!error) 2283 error = VOP_GETATTR(vp, &va, cred, procp); 2284 vput(vp); 2285 } 2286 out: 2287 if (dirp) { 2288 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 2289 vrele(dirp); 2290 } 2291 nfsm_reply(NFSX_SRVFH(v3) + NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2292 if (v3) { 2293 if (!error) { 2294 nfsm_srvpostop_fh(fhp); 2295 nfsm_srvpostop_attr(0, &va); 2296 } 2297 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2298 } else { 2299 nfsm_srvfhtom(fhp, v3); 2300 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 2301 nfsm_srvfillattr(&va, fp); 2302 } 2303 return (0); 2304 nfsmout: 2305 if (dirp) 2306 vrele(dirp); 2307 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2308 if (nd.ni_dvp == nd.ni_vp) 2309 vrele(nd.ni_dvp); 2310 else 2311 vput(nd.ni_dvp); 2312 if (nd.ni_vp) 2313 vrele(nd.ni_vp); 2314 return (error); 2315 } 2316 2317 /* 2318 * nfs rmdir service 2319 */ 2320 int 2321 nfsrv_rmdir(nfsd, slp, procp, mrq) 2322 struct nfsrv_descript *nfsd; 2323 struct nfssvc_sock *slp; 2324 struct proc *procp; 2325 struct mbuf **mrq; 2326 { 2327 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2328 struct mbuf *nam = nfsd->nd_nam; 2329 caddr_t dpos = nfsd->nd_dpos; 2330 struct ucred *cred = &nfsd->nd_cr; 2331 register u_int32_t *tl; 2332 register int32_t t1; 2333 caddr_t bpos; 2334 int error = 0, cache, len, dirfor_ret = 1, diraft_ret = 1; 2335 int v3 = (nfsd->nd_flag & ND_NFSV3); 2336 char *cp2; 2337 struct mbuf *mb, *mreq; 2338 struct vnode *vp, *dirp = (struct vnode *)0; 2339 struct vattr dirfor, diraft; 2340 nfsfh_t nfh; 2341 fhandle_t *fhp; 2342 struct nameidata nd; 2343 u_quad_t frev; 2344 2345 fhp = &nfh.fh_generic; 2346 nfsm_srvmtofh(fhp); 2347 nfsm_srvnamesiz(len); 2348 nd.ni_cnd.cn_cred = cred; 2349 nd.ni_cnd.cn_nameiop = DELETE; 2350 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 2351 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 2352 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2353 if (dirp) { 2354 if (v3) 2355 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 2356 procp); 2357 else { 2358 vrele(dirp); 2359 dirp = (struct vnode *)0; 2360 } 2361 } 2362 if (error) { 2363 nfsm_reply(NFSX_WCCDATA(v3)); 2364 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2365 if (dirp) 2366 vrele(dirp); 2367 return (0); 2368 } 2369 vp = nd.ni_vp; 2370 if (vp->v_type != VDIR) { 2371 error = ENOTDIR; 2372 goto out; 2373 } 2374 /* 2375 * No rmdir "." please. 2376 */ 2377 if (nd.ni_dvp == vp) { 2378 error = EINVAL; 2379 goto out; 2380 } 2381 /* 2382 * The root of a mounted filesystem cannot be deleted. 2383 */ 2384 if (vp->v_flag & VROOT) 2385 error = EBUSY; 2386 out: 2387 if (!error) { 2388 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2389 nqsrv_getl(vp, ND_WRITE); 2390 error = VOP_RMDIR(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); 2391 } else { 2392 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2393 if (nd.ni_dvp == nd.ni_vp) 2394 vrele(nd.ni_dvp); 2395 else 2396 vput(nd.ni_dvp); 2397 vput(vp); 2398 } 2399 if (dirp) { 2400 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 2401 vrele(dirp); 2402 } 2403 nfsm_reply(NFSX_WCCDATA(v3)); 2404 if (v3) { 2405 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2406 return (0); 2407 } 2408 nfsm_srvdone; 2409 } 2410 2411 /* 2412 * nfs readdir service 2413 * - mallocs what it thinks is enough to read 2414 * count rounded up to a multiple of NFS_DIRBLKSIZ <= NFS_MAXREADDIR 2415 * - calls VOP_READDIR() 2416 * - loops around building the reply 2417 * if the output generated exceeds count break out of loop 2418 * The nfsm_clget macro is used here so that the reply will be packed 2419 * tightly in mbuf clusters. 2420 * - it only knows that it has encountered eof when the VOP_READDIR() 2421 * reads nothing 2422 * - as such one readdir rpc will return eof false although you are there 2423 * and then the next will return eof 2424 * - it trims out records with d_fileno == 0 2425 * this doesn't matter for Unix clients, but they might confuse clients 2426 * for other os'. 2427 * - it trims out records with d_type == DT_WHT 2428 * these cannot be seen through NFS (unless we extend the protocol) 2429 * NB: It is tempting to set eof to true if the VOP_READDIR() reads less 2430 * than requested, but this may not apply to all filesystems. For 2431 * example, client NFS does not { although it is never remote mounted 2432 * anyhow } 2433 * The alternate call nfsrv_readdirplus() does lookups as well. 2434 * PS: The NFS protocol spec. does not clarify what the "count" byte 2435 * argument is a count of.. just name strings and file id's or the 2436 * entire reply rpc or ... 2437 * I tried just file name and id sizes and it confused the Sun client, 2438 * so I am using the full rpc size now. The "paranoia.." comment refers 2439 * to including the status longwords that are not a part of the dir. 2440 * "entry" structures, but are in the rpc. 2441 */ 2442 struct flrep { 2443 nfsuint64 fl_off; 2444 u_int32_t fl_postopok; 2445 u_int32_t fl_fattr[NFSX_V3FATTR / sizeof (u_int32_t)]; 2446 u_int32_t fl_fhok; 2447 u_int32_t fl_fhsize; 2448 u_int32_t fl_nfh[NFSX_V3FH / sizeof (u_int32_t)]; 2449 }; 2450 2451 int 2452 nfsrv_readdir(nfsd, slp, procp, mrq) 2453 struct nfsrv_descript *nfsd; 2454 struct nfssvc_sock *slp; 2455 struct proc *procp; 2456 struct mbuf **mrq; 2457 { 2458 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2459 struct mbuf *nam = nfsd->nd_nam; 2460 caddr_t dpos = nfsd->nd_dpos; 2461 struct ucred *cred = &nfsd->nd_cr; 2462 register char *bp, *be; 2463 register struct mbuf *mp; 2464 register struct dirent *dp; 2465 register caddr_t cp; 2466 register u_int32_t *tl; 2467 register int32_t t1; 2468 caddr_t bpos; 2469 struct mbuf *mb, *mb2, *mreq, *mp2; 2470 char *cpos, *cend, *cp2, *rbuf; 2471 struct vnode *vp; 2472 struct vattr at; 2473 nfsfh_t nfh; 2474 fhandle_t *fhp; 2475 struct uio io; 2476 struct iovec iv; 2477 int len, nlen, rem, xfer, tsiz, i, error = 0, getret = 1; 2478 int siz, cnt, fullsiz, eofflag, rdonly, cache, ncookies; 2479 int v3 = (nfsd->nd_flag & ND_NFSV3); 2480 u_quad_t frev, off, toff, verf; 2481 off_t *cookies = NULL, *cookiep; 2482 nfsuint64 jar; 2483 2484 fhp = &nfh.fh_generic; 2485 nfsm_srvmtofh(fhp); 2486 if (v3) { 2487 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 2488 toff = fxdr_hyper(tl); 2489 tl += 2; 2490 verf = fxdr_hyper(tl); 2491 tl += 2; 2492 } else { 2493 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2494 toff = fxdr_unsigned(u_quad_t, *tl++); 2495 } 2496 off = toff; 2497 cnt = fxdr_unsigned(int, *tl); 2498 siz = ((cnt + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1)); 2499 xfer = NFS_SRVMAXDATA(nfsd); 2500 if (siz > xfer) 2501 siz = xfer; 2502 fullsiz = siz; 2503 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 2504 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2505 if (!error && vp->v_type != VDIR) { 2506 error = ENOTDIR; 2507 vput(vp); 2508 } 2509 if (error) { 2510 nfsm_reply(NFSX_UNSIGNED); 2511 nfsm_srvpostop_attr(getret, &at); 2512 return (0); 2513 } 2514 nqsrv_getl(vp, ND_READ); 2515 if (v3) { 2516 error = getret = VOP_GETATTR(vp, &at, cred, procp); 2517 #ifdef NFS3_STRICTVERF 2518 /* 2519 * XXX This check is too strict for Solaris 2.5 clients. 2520 */ 2521 if (!error && toff && verf != at.va_filerev) 2522 error = NFSERR_BAD_COOKIE; 2523 #endif 2524 } 2525 if (!error) 2526 error = nfsrv_access(vp, VEXEC, cred, rdonly, procp, 0); 2527 if (error) { 2528 vput(vp); 2529 nfsm_reply(NFSX_POSTOPATTR(v3)); 2530 nfsm_srvpostop_attr(getret, &at); 2531 return (0); 2532 } 2533 VOP_UNLOCK(vp, 0); 2534 MALLOC(rbuf, caddr_t, siz, M_TEMP, M_WAITOK); 2535 again: 2536 iv.iov_base = rbuf; 2537 iv.iov_len = fullsiz; 2538 io.uio_iov = &iv; 2539 io.uio_iovcnt = 1; 2540 io.uio_offset = (off_t)off; 2541 io.uio_resid = fullsiz; 2542 io.uio_segflg = UIO_SYSSPACE; 2543 io.uio_rw = UIO_READ; 2544 io.uio_procp = (struct proc *)0; 2545 eofflag = 0; 2546 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2547 2548 error = VOP_READDIR(vp, &io, cred, &eofflag, &cookies, &ncookies); 2549 2550 off = (off_t)io.uio_offset; 2551 if (!cookies && !error) 2552 error = NFSERR_PERM; 2553 if (v3) { 2554 getret = VOP_GETATTR(vp, &at, cred, procp); 2555 if (!error) 2556 error = getret; 2557 } 2558 2559 VOP_UNLOCK(vp, 0); 2560 if (error) { 2561 vrele(vp); 2562 FREE((caddr_t)rbuf, M_TEMP); 2563 if (cookies) 2564 free((caddr_t)cookies, M_TEMP); 2565 nfsm_reply(NFSX_POSTOPATTR(v3)); 2566 nfsm_srvpostop_attr(getret, &at); 2567 return (0); 2568 } 2569 if (io.uio_resid) { 2570 siz -= io.uio_resid; 2571 2572 /* 2573 * If nothing read, return eof 2574 * rpc reply 2575 */ 2576 if (siz == 0) { 2577 vrele(vp); 2578 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_COOKIEVERF(v3) + 2579 2 * NFSX_UNSIGNED); 2580 if (v3) { 2581 nfsm_srvpostop_attr(getret, &at); 2582 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 2583 txdr_hyper(at.va_filerev, tl); 2584 tl += 2; 2585 } else 2586 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2587 *tl++ = nfs_false; 2588 *tl = nfs_true; 2589 FREE((caddr_t)rbuf, M_TEMP); 2590 FREE((caddr_t)cookies, M_TEMP); 2591 return (0); 2592 } 2593 } 2594 2595 /* 2596 * Check for degenerate cases of nothing useful read. 2597 * If so go try again 2598 */ 2599 cpos = rbuf; 2600 cend = rbuf + siz; 2601 dp = (struct dirent *)cpos; 2602 cookiep = cookies; 2603 2604 while (cpos < cend && ncookies > 0 && 2605 (dp->d_fileno == 0 || dp->d_type == DT_WHT)) { 2606 cpos += dp->d_reclen; 2607 dp = (struct dirent *)cpos; 2608 cookiep++; 2609 ncookies--; 2610 } 2611 if (cpos >= cend || ncookies == 0) { 2612 toff = off; 2613 siz = fullsiz; 2614 goto again; 2615 } 2616 2617 len = 3 * NFSX_UNSIGNED; /* paranoia, probably can be 0 */ 2618 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_COOKIEVERF(v3) + siz); 2619 if (v3) { 2620 nfsm_srvpostop_attr(getret, &at); 2621 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2622 txdr_hyper(at.va_filerev, tl); 2623 } 2624 mp = mp2 = mb; 2625 bp = bpos; 2626 be = bp + M_TRAILINGSPACE(mp); 2627 2628 /* Loop through the records and build reply */ 2629 while (cpos < cend && ncookies > 0) { 2630 if (dp->d_fileno != 0 && dp->d_type != DT_WHT) { 2631 nlen = dp->d_namlen; 2632 rem = nfsm_rndup(nlen)-nlen; 2633 len += (4 * NFSX_UNSIGNED + nlen + rem); 2634 if (v3) 2635 len += 2 * NFSX_UNSIGNED; 2636 if (len > cnt) { 2637 eofflag = 0; 2638 break; 2639 } 2640 /* 2641 * Build the directory record xdr from 2642 * the dirent entry. 2643 */ 2644 nfsm_clget; 2645 *tl = nfs_true; 2646 bp += NFSX_UNSIGNED; 2647 if (v3) { 2648 nfsm_clget; 2649 *tl = 0; 2650 bp += NFSX_UNSIGNED; 2651 } 2652 nfsm_clget; 2653 *tl = txdr_unsigned(dp->d_fileno); 2654 bp += NFSX_UNSIGNED; 2655 nfsm_clget; 2656 *tl = txdr_unsigned(nlen); 2657 bp += NFSX_UNSIGNED; 2658 2659 /* And loop around copying the name */ 2660 xfer = nlen; 2661 cp = dp->d_name; 2662 while (xfer > 0) { 2663 nfsm_clget; 2664 if ((bp+xfer) > be) 2665 tsiz = be-bp; 2666 else 2667 tsiz = xfer; 2668 memcpy(bp, cp, tsiz); 2669 bp += tsiz; 2670 xfer -= tsiz; 2671 if (xfer > 0) 2672 cp += tsiz; 2673 } 2674 /* And null pad to an int32_t boundary */ 2675 for (i = 0; i < rem; i++) 2676 *bp++ = '\0'; 2677 nfsm_clget; 2678 2679 /* Finish off the record */ 2680 txdr_hyper(*cookiep, &jar); 2681 if (v3) { 2682 *tl = jar.nfsuquad[0]; 2683 bp += NFSX_UNSIGNED; 2684 nfsm_clget; 2685 } 2686 *tl = jar.nfsuquad[1]; 2687 bp += NFSX_UNSIGNED; 2688 } 2689 cpos += dp->d_reclen; 2690 dp = (struct dirent *)cpos; 2691 cookiep++; 2692 ncookies--; 2693 } 2694 vrele(vp); 2695 nfsm_clget; 2696 *tl = nfs_false; 2697 bp += NFSX_UNSIGNED; 2698 nfsm_clget; 2699 if (eofflag) 2700 *tl = nfs_true; 2701 else 2702 *tl = nfs_false; 2703 bp += NFSX_UNSIGNED; 2704 if (mp != mb) { 2705 if (bp < be) 2706 mp->m_len = bp - mtod(mp, caddr_t); 2707 } else 2708 mp->m_len += bp - bpos; 2709 FREE((caddr_t)rbuf, M_TEMP); 2710 FREE((caddr_t)cookies, M_TEMP); 2711 nfsm_srvdone; 2712 } 2713 2714 int 2715 nfsrv_readdirplus(nfsd, slp, procp, mrq) 2716 struct nfsrv_descript *nfsd; 2717 struct nfssvc_sock *slp; 2718 struct proc *procp; 2719 struct mbuf **mrq; 2720 { 2721 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2722 struct mbuf *nam = nfsd->nd_nam; 2723 caddr_t dpos = nfsd->nd_dpos; 2724 struct ucred *cred = &nfsd->nd_cr; 2725 register char *bp, *be; 2726 register struct mbuf *mp; 2727 register struct dirent *dp; 2728 register caddr_t cp; 2729 register u_int32_t *tl; 2730 register int32_t t1; 2731 caddr_t bpos; 2732 struct mbuf *mb, *mb2, *mreq, *mp2; 2733 char *cpos, *cend, *cp2, *rbuf; 2734 struct vnode *vp, *nvp; 2735 struct flrep fl; 2736 nfsfh_t nfh; 2737 fhandle_t *fhp, *nfhp = (fhandle_t *)fl.fl_nfh; 2738 struct uio io; 2739 struct iovec iv; 2740 struct vattr va, at, *vap = &va; 2741 struct nfs_fattr *fp; 2742 int len, nlen, rem, xfer, tsiz, i, error = 0, getret = 1; 2743 int siz, cnt, fullsiz, eofflag, rdonly, cache, dirlen, ncookies; 2744 u_quad_t frev, off, toff, verf; 2745 off_t *cookies = NULL, *cookiep; 2746 2747 fhp = &nfh.fh_generic; 2748 nfsm_srvmtofh(fhp); 2749 nfsm_dissect(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 2750 toff = fxdr_hyper(tl); 2751 tl += 2; 2752 verf = fxdr_hyper(tl); 2753 tl += 2; 2754 siz = fxdr_unsigned(int, *tl++); 2755 cnt = fxdr_unsigned(int, *tl); 2756 off = toff; 2757 siz = ((siz + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1)); 2758 xfer = NFS_SRVMAXDATA(nfsd); 2759 if (siz > xfer) 2760 siz = xfer; 2761 fullsiz = siz; 2762 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 2763 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2764 if (!error && vp->v_type != VDIR) { 2765 error = ENOTDIR; 2766 vput(vp); 2767 } 2768 if (error) { 2769 nfsm_reply(NFSX_UNSIGNED); 2770 nfsm_srvpostop_attr(getret, &at); 2771 return (0); 2772 } 2773 error = getret = VOP_GETATTR(vp, &at, cred, procp); 2774 #ifdef NFS3_STRICTVERF 2775 /* 2776 * XXX This check is too strict for Solaris 2.5 clients. 2777 */ 2778 if (!error && toff && verf != at.va_filerev) 2779 error = NFSERR_BAD_COOKIE; 2780 #endif 2781 if (!error) { 2782 nqsrv_getl(vp, ND_READ); 2783 error = nfsrv_access(vp, VEXEC, cred, rdonly, procp, 0); 2784 } 2785 if (error) { 2786 vput(vp); 2787 nfsm_reply(NFSX_V3POSTOPATTR); 2788 nfsm_srvpostop_attr(getret, &at); 2789 return (0); 2790 } 2791 VOP_UNLOCK(vp, 0); 2792 2793 MALLOC(rbuf, caddr_t, siz, M_TEMP, M_WAITOK); 2794 again: 2795 iv.iov_base = rbuf; 2796 iv.iov_len = fullsiz; 2797 io.uio_iov = &iv; 2798 io.uio_iovcnt = 1; 2799 io.uio_offset = (off_t)off; 2800 io.uio_resid = fullsiz; 2801 io.uio_segflg = UIO_SYSSPACE; 2802 io.uio_rw = UIO_READ; 2803 io.uio_procp = (struct proc *)0; 2804 eofflag = 0; 2805 2806 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2807 2808 error = VOP_READDIR(vp, &io, cred, &eofflag, &cookies, &ncookies); 2809 2810 off = (u_quad_t)io.uio_offset; 2811 getret = VOP_GETATTR(vp, &at, cred, procp); 2812 2813 VOP_UNLOCK(vp, 0); 2814 2815 /* 2816 * If the VGET operation doesn't work for this filesystem, 2817 * we can't support readdirplus. Returning NOTSUPP should 2818 * make clients fall back to plain readdir. 2819 * There's no need to check for VPTOFH as well, we wouldn't 2820 * even be here otherwise. 2821 */ 2822 if (!getret) { 2823 if ((getret = VFS_VGET(vp->v_mount, at.va_fileid, &nvp))) 2824 getret = (getret == EOPNOTSUPP) ? 2825 NFSERR_NOTSUPP : NFSERR_IO; 2826 else 2827 vput(nvp); 2828 } 2829 2830 if (!cookies && !error) 2831 error = NFSERR_PERM; 2832 if (!error) 2833 error = getret; 2834 if (error) { 2835 vrele(vp); 2836 if (cookies) 2837 FREE((caddr_t)cookies, M_TEMP); 2838 FREE((caddr_t)rbuf, M_TEMP); 2839 nfsm_reply(NFSX_V3POSTOPATTR); 2840 nfsm_srvpostop_attr(getret, &at); 2841 return (0); 2842 } 2843 if (io.uio_resid) { 2844 siz -= io.uio_resid; 2845 2846 /* 2847 * If nothing read, return eof 2848 * rpc reply 2849 */ 2850 if (siz == 0) { 2851 vrele(vp); 2852 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF + 2853 2 * NFSX_UNSIGNED); 2854 nfsm_srvpostop_attr(getret, &at); 2855 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 2856 txdr_hyper(at.va_filerev, tl); 2857 tl += 2; 2858 *tl++ = nfs_false; 2859 *tl = nfs_true; 2860 FREE((caddr_t)cookies, M_TEMP); 2861 FREE((caddr_t)rbuf, M_TEMP); 2862 return (0); 2863 } 2864 } 2865 2866 /* 2867 * Check for degenerate cases of nothing useful read. 2868 * If so go try again 2869 */ 2870 cpos = rbuf; 2871 cend = rbuf + siz; 2872 dp = (struct dirent *)cpos; 2873 cookiep = cookies; 2874 2875 while (cpos < cend && ncookies > 0 && 2876 (dp->d_fileno == 0 || dp->d_type == DT_WHT)) { 2877 cpos += dp->d_reclen; 2878 dp = (struct dirent *)cpos; 2879 cookiep++; 2880 ncookies--; 2881 } 2882 if (cpos >= cend || ncookies == 0) { 2883 toff = off; 2884 siz = fullsiz; 2885 goto again; 2886 } 2887 2888 dirlen = len = NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF + 2 * NFSX_UNSIGNED; 2889 nfsm_reply(cnt); 2890 nfsm_srvpostop_attr(getret, &at); 2891 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2892 txdr_hyper(at.va_filerev, tl); 2893 mp = mp2 = mb; 2894 bp = bpos; 2895 be = bp + M_TRAILINGSPACE(mp); 2896 2897 /* Loop through the records and build reply */ 2898 while (cpos < cend && ncookies > 0) { 2899 if (dp->d_fileno != 0 && dp->d_type != DT_WHT) { 2900 nlen = dp->d_namlen; 2901 rem = nfsm_rndup(nlen)-nlen; 2902 2903 /* 2904 * For readdir_and_lookup get the vnode using 2905 * the file number. 2906 */ 2907 if (VFS_VGET(vp->v_mount, dp->d_fileno, &nvp)) 2908 goto invalid; 2909 memset((caddr_t)nfhp, 0, NFSX_V3FH); 2910 nfhp->fh_fsid = 2911 nvp->v_mount->mnt_stat.f_fsid; 2912 if (VFS_VPTOFH(nvp, &nfhp->fh_fid)) { 2913 vput(nvp); 2914 goto invalid; 2915 } 2916 if (VOP_GETATTR(nvp, vap, cred, procp)) { 2917 vput(nvp); 2918 goto invalid; 2919 } 2920 vput(nvp); 2921 2922 /* 2923 * If either the dircount or maxcount will be 2924 * exceeded, get out now. Both of these lengths 2925 * are calculated conservatively, including all 2926 * XDR overheads. 2927 */ 2928 len += (7 * NFSX_UNSIGNED + nlen + rem + NFSX_V3FH + 2929 NFSX_V3POSTOPATTR); 2930 dirlen += (6 * NFSX_UNSIGNED + nlen + rem); 2931 if (len > cnt || dirlen > fullsiz) { 2932 eofflag = 0; 2933 break; 2934 } 2935 2936 /* 2937 * Build the directory record xdr from 2938 * the dirent entry. 2939 */ 2940 fp = (struct nfs_fattr *)&fl.fl_fattr; 2941 nfsm_srvfillattr(vap, fp); 2942 fl.fl_fhsize = txdr_unsigned(NFSX_V3FH); 2943 fl.fl_fhok = nfs_true; 2944 fl.fl_postopok = nfs_true; 2945 txdr_hyper(*cookiep, fl.fl_off.nfsuquad); 2946 2947 nfsm_clget; 2948 *tl = nfs_true; 2949 bp += NFSX_UNSIGNED; 2950 nfsm_clget; 2951 *tl = 0; 2952 bp += NFSX_UNSIGNED; 2953 nfsm_clget; 2954 *tl = txdr_unsigned(dp->d_fileno); 2955 bp += NFSX_UNSIGNED; 2956 nfsm_clget; 2957 *tl = txdr_unsigned(nlen); 2958 bp += NFSX_UNSIGNED; 2959 2960 /* And loop around copying the name */ 2961 xfer = nlen; 2962 cp = dp->d_name; 2963 while (xfer > 0) { 2964 nfsm_clget; 2965 if ((bp + xfer) > be) 2966 tsiz = be - bp; 2967 else 2968 tsiz = xfer; 2969 memcpy(bp, cp, tsiz); 2970 bp += tsiz; 2971 xfer -= tsiz; 2972 if (xfer > 0) 2973 cp += tsiz; 2974 } 2975 /* And null pad to an int32_t boundary */ 2976 for (i = 0; i < rem; i++) 2977 *bp++ = '\0'; 2978 2979 /* 2980 * Now copy the flrep structure out. 2981 */ 2982 xfer = sizeof (struct flrep); 2983 cp = (caddr_t)&fl; 2984 while (xfer > 0) { 2985 nfsm_clget; 2986 if ((bp + xfer) > be) 2987 tsiz = be - bp; 2988 else 2989 tsiz = xfer; 2990 memcpy(bp, cp, tsiz); 2991 bp += tsiz; 2992 xfer -= tsiz; 2993 if (xfer > 0) 2994 cp += tsiz; 2995 } 2996 } 2997 invalid: 2998 cpos += dp->d_reclen; 2999 dp = (struct dirent *)cpos; 3000 cookiep++; 3001 ncookies--; 3002 } 3003 vrele(vp); 3004 nfsm_clget; 3005 *tl = nfs_false; 3006 bp += NFSX_UNSIGNED; 3007 nfsm_clget; 3008 if (eofflag) 3009 *tl = nfs_true; 3010 else 3011 *tl = nfs_false; 3012 bp += NFSX_UNSIGNED; 3013 if (mp != mb) { 3014 if (bp < be) 3015 mp->m_len = bp - mtod(mp, caddr_t); 3016 } else 3017 mp->m_len += bp - bpos; 3018 FREE((caddr_t)cookies, M_TEMP); 3019 FREE((caddr_t)rbuf, M_TEMP); 3020 nfsm_srvdone; 3021 } 3022 3023 /* 3024 * nfs commit service 3025 */ 3026 int 3027 nfsrv_commit(nfsd, slp, procp, mrq) 3028 struct nfsrv_descript *nfsd; 3029 struct nfssvc_sock *slp; 3030 struct proc *procp; 3031 struct mbuf **mrq; 3032 { 3033 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3034 struct mbuf *nam = nfsd->nd_nam; 3035 caddr_t dpos = nfsd->nd_dpos; 3036 struct ucred *cred = &nfsd->nd_cr; 3037 struct vattr bfor, aft; 3038 struct vnode *vp; 3039 nfsfh_t nfh; 3040 fhandle_t *fhp; 3041 register u_int32_t *tl; 3042 register int32_t t1; 3043 caddr_t bpos; 3044 int error = 0, rdonly, for_ret = 1, aft_ret = 1, cnt, cache; 3045 char *cp2; 3046 struct mbuf *mb, *mb2, *mreq; 3047 u_quad_t frev, off; 3048 3049 #ifndef nolint 3050 cache = 0; 3051 #endif 3052 fhp = &nfh.fh_generic; 3053 nfsm_srvmtofh(fhp); 3054 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 3055 3056 /* 3057 * XXX At this time VOP_FSYNC() does not accept offset and byte 3058 * count parameters, so these arguments are useless (someday maybe). 3059 */ 3060 off = fxdr_hyper(tl); 3061 tl += 2; 3062 cnt = fxdr_unsigned(int, *tl); 3063 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 3064 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 3065 if (error) { 3066 nfsm_reply(2 * NFSX_UNSIGNED); 3067 nfsm_srvwcc_data(for_ret, &bfor, aft_ret, &aft); 3068 return (0); 3069 } 3070 for_ret = VOP_GETATTR(vp, &bfor, cred, procp); 3071 error = VOP_FSYNC(vp, cred, FSYNC_WAIT, procp); 3072 aft_ret = VOP_GETATTR(vp, &aft, cred, procp); 3073 vput(vp); 3074 nfsm_reply(NFSX_V3WCCDATA + NFSX_V3WRITEVERF); 3075 nfsm_srvwcc_data(for_ret, &bfor, aft_ret, &aft); 3076 if (!error) { 3077 nfsm_build(tl, u_int32_t *, NFSX_V3WRITEVERF); 3078 *tl++ = txdr_unsigned(boottime.tv_sec); 3079 *tl = txdr_unsigned(boottime.tv_usec); 3080 } else 3081 return (0); 3082 nfsm_srvdone; 3083 } 3084 3085 /* 3086 * nfs statfs service 3087 */ 3088 int 3089 nfsrv_statfs(nfsd, slp, procp, mrq) 3090 struct nfsrv_descript *nfsd; 3091 struct nfssvc_sock *slp; 3092 struct proc *procp; 3093 struct mbuf **mrq; 3094 { 3095 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3096 struct mbuf *nam = nfsd->nd_nam; 3097 caddr_t dpos = nfsd->nd_dpos; 3098 struct ucred *cred = &nfsd->nd_cr; 3099 register struct statfs *sf; 3100 register struct nfs_statfs *sfp; 3101 register u_int32_t *tl; 3102 register int32_t t1; 3103 caddr_t bpos; 3104 int error = 0, rdonly, cache, getret = 1; 3105 int v3 = (nfsd->nd_flag & ND_NFSV3); 3106 char *cp2; 3107 struct mbuf *mb, *mb2, *mreq; 3108 struct vnode *vp; 3109 struct vattr at; 3110 nfsfh_t nfh; 3111 fhandle_t *fhp; 3112 struct statfs statfs; 3113 u_quad_t frev, tval; 3114 3115 #ifndef nolint 3116 cache = 0; 3117 #endif 3118 fhp = &nfh.fh_generic; 3119 nfsm_srvmtofh(fhp); 3120 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 3121 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 3122 if (error) { 3123 nfsm_reply(NFSX_UNSIGNED); 3124 nfsm_srvpostop_attr(getret, &at); 3125 return (0); 3126 } 3127 sf = &statfs; 3128 error = VFS_STATFS(vp->v_mount, sf, procp); 3129 getret = VOP_GETATTR(vp, &at, cred, procp); 3130 vput(vp); 3131 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_STATFS(v3)); 3132 if (v3) 3133 nfsm_srvpostop_attr(getret, &at); 3134 if (error) 3135 return (0); 3136 nfsm_build(sfp, struct nfs_statfs *, NFSX_STATFS(v3)); 3137 if (v3) { 3138 tval = (u_quad_t)((quad_t)sf->f_blocks * (quad_t)sf->f_bsize); 3139 txdr_hyper(tval, &sfp->sf_tbytes); 3140 tval = (u_quad_t)((quad_t)sf->f_bfree * (quad_t)sf->f_bsize); 3141 txdr_hyper(tval, &sfp->sf_fbytes); 3142 tval = (u_quad_t)((quad_t)sf->f_bavail * (quad_t)sf->f_bsize); 3143 txdr_hyper(tval, &sfp->sf_abytes); 3144 tval = (u_quad_t)sf->f_files; 3145 txdr_hyper(tval, &sfp->sf_tfiles); 3146 tval = (u_quad_t)sf->f_ffree; 3147 txdr_hyper(tval, &sfp->sf_ffiles); 3148 txdr_hyper(tval, &sfp->sf_afiles); 3149 sfp->sf_invarsec = 0; 3150 } else { 3151 sfp->sf_tsize = txdr_unsigned(NFS_MAXDGRAMDATA); 3152 sfp->sf_bsize = txdr_unsigned(sf->f_bsize); 3153 sfp->sf_blocks = txdr_unsigned(sf->f_blocks); 3154 sfp->sf_bfree = txdr_unsigned(sf->f_bfree); 3155 sfp->sf_bavail = txdr_unsigned(sf->f_bavail); 3156 } 3157 nfsm_srvdone; 3158 } 3159 3160 /* 3161 * nfs fsinfo service 3162 */ 3163 int 3164 nfsrv_fsinfo(nfsd, slp, procp, mrq) 3165 struct nfsrv_descript *nfsd; 3166 struct nfssvc_sock *slp; 3167 struct proc *procp; 3168 struct mbuf **mrq; 3169 { 3170 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3171 struct mbuf *nam = nfsd->nd_nam; 3172 caddr_t dpos = nfsd->nd_dpos; 3173 struct ucred *cred = &nfsd->nd_cr; 3174 register u_int32_t *tl; 3175 register struct nfsv3_fsinfo *sip; 3176 register int32_t t1; 3177 caddr_t bpos; 3178 int error = 0, rdonly, cache, getret = 1, pref; 3179 char *cp2; 3180 struct mbuf *mb, *mb2, *mreq; 3181 struct vnode *vp; 3182 struct vattr at; 3183 nfsfh_t nfh; 3184 fhandle_t *fhp; 3185 u_quad_t frev, maxfsize; 3186 struct statfs sb; 3187 3188 #ifndef nolint 3189 cache = 0; 3190 #endif 3191 fhp = &nfh.fh_generic; 3192 nfsm_srvmtofh(fhp); 3193 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 3194 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 3195 if (error) { 3196 nfsm_reply(NFSX_UNSIGNED); 3197 nfsm_srvpostop_attr(getret, &at); 3198 return (0); 3199 } 3200 3201 /* XXX Try to make a guess on the max file size. */ 3202 VFS_STATFS(vp->v_mount, &sb, (struct proc *)0); 3203 maxfsize = (u_quad_t)0x80000000 * sb.f_bsize - 1; 3204 3205 getret = VOP_GETATTR(vp, &at, cred, procp); 3206 vput(vp); 3207 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3FSINFO); 3208 nfsm_srvpostop_attr(getret, &at); 3209 nfsm_build(sip, struct nfsv3_fsinfo *, NFSX_V3FSINFO); 3210 3211 /* 3212 * XXX 3213 * There should be file system VFS OP(s) to get this information. 3214 * For now, assume ufs. 3215 */ 3216 if (slp->ns_so->so_type == SOCK_DGRAM) 3217 pref = NFS_MAXDGRAMDATA; 3218 else 3219 pref = NFS_MAXDATA; 3220 sip->fs_rtmax = txdr_unsigned(NFS_MAXDATA); 3221 sip->fs_rtpref = txdr_unsigned(pref); 3222 sip->fs_rtmult = txdr_unsigned(NFS_FABLKSIZE); 3223 sip->fs_wtmax = txdr_unsigned(NFS_MAXDATA); 3224 sip->fs_wtpref = txdr_unsigned(pref); 3225 sip->fs_wtmult = txdr_unsigned(NFS_FABLKSIZE); 3226 sip->fs_dtpref = txdr_unsigned(pref); 3227 txdr_hyper(maxfsize, &sip->fs_maxfilesize); 3228 sip->fs_timedelta.nfsv3_sec = 0; 3229 sip->fs_timedelta.nfsv3_nsec = txdr_unsigned(1); 3230 sip->fs_properties = txdr_unsigned(NFSV3FSINFO_LINK | 3231 NFSV3FSINFO_SYMLINK | NFSV3FSINFO_HOMOGENEOUS | 3232 NFSV3FSINFO_CANSETTIME); 3233 nfsm_srvdone; 3234 } 3235 3236 /* 3237 * nfs pathconf service 3238 */ 3239 int 3240 nfsrv_pathconf(nfsd, slp, procp, mrq) 3241 struct nfsrv_descript *nfsd; 3242 struct nfssvc_sock *slp; 3243 struct proc *procp; 3244 struct mbuf **mrq; 3245 { 3246 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3247 struct mbuf *nam = nfsd->nd_nam; 3248 caddr_t dpos = nfsd->nd_dpos; 3249 struct ucred *cred = &nfsd->nd_cr; 3250 register u_int32_t *tl; 3251 register struct nfsv3_pathconf *pc; 3252 register int32_t t1; 3253 caddr_t bpos; 3254 int error = 0, rdonly, cache, getret = 1; 3255 register_t linkmax, namemax, chownres, notrunc; 3256 char *cp2; 3257 struct mbuf *mb, *mb2, *mreq; 3258 struct vnode *vp; 3259 struct vattr at; 3260 nfsfh_t nfh; 3261 fhandle_t *fhp; 3262 u_quad_t frev; 3263 3264 #ifndef nolint 3265 cache = 0; 3266 #endif 3267 fhp = &nfh.fh_generic; 3268 nfsm_srvmtofh(fhp); 3269 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 3270 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 3271 if (error) { 3272 nfsm_reply(NFSX_UNSIGNED); 3273 nfsm_srvpostop_attr(getret, &at); 3274 return (0); 3275 } 3276 error = VOP_PATHCONF(vp, _PC_LINK_MAX, &linkmax); 3277 if (!error) 3278 error = VOP_PATHCONF(vp, _PC_NAME_MAX, &namemax); 3279 if (!error) 3280 error = VOP_PATHCONF(vp, _PC_CHOWN_RESTRICTED, &chownres); 3281 if (!error) 3282 error = VOP_PATHCONF(vp, _PC_NO_TRUNC, ¬runc); 3283 getret = VOP_GETATTR(vp, &at, cred, procp); 3284 vput(vp); 3285 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3PATHCONF); 3286 nfsm_srvpostop_attr(getret, &at); 3287 if (error) 3288 return (0); 3289 nfsm_build(pc, struct nfsv3_pathconf *, NFSX_V3PATHCONF); 3290 3291 pc->pc_linkmax = txdr_unsigned(linkmax); 3292 pc->pc_namemax = txdr_unsigned(namemax); 3293 pc->pc_notrunc = txdr_unsigned(notrunc); 3294 pc->pc_chownrestricted = txdr_unsigned(chownres); 3295 3296 /* 3297 * These should probably be supported by VOP_PATHCONF(), but 3298 * until msdosfs is exportable (why would you want to?), the 3299 * Unix defaults should be ok. 3300 */ 3301 pc->pc_caseinsensitive = nfs_false; 3302 pc->pc_casepreserving = nfs_true; 3303 nfsm_srvdone; 3304 } 3305 3306 /* 3307 * Null operation, used by clients to ping server 3308 */ 3309 /* ARGSUSED */ 3310 int 3311 nfsrv_null(nfsd, slp, procp, mrq) 3312 struct nfsrv_descript *nfsd; 3313 struct nfssvc_sock *slp; 3314 struct proc *procp; 3315 struct mbuf **mrq; 3316 { 3317 struct mbuf *mrep = nfsd->nd_mrep; 3318 caddr_t bpos; 3319 int error = NFSERR_RETVOID, cache = 0; 3320 struct mbuf *mb, *mreq; 3321 u_quad_t frev; 3322 3323 nfsm_reply(0); 3324 return (0); 3325 } 3326 3327 /* 3328 * No operation, used for obsolete procedures 3329 */ 3330 /* ARGSUSED */ 3331 int 3332 nfsrv_noop(nfsd, slp, procp, mrq) 3333 struct nfsrv_descript *nfsd; 3334 struct nfssvc_sock *slp; 3335 struct proc *procp; 3336 struct mbuf **mrq; 3337 { 3338 struct mbuf *mrep = nfsd->nd_mrep; 3339 caddr_t bpos; 3340 int error, cache = 0; 3341 struct mbuf *mb, *mreq; 3342 u_quad_t frev; 3343 3344 if (nfsd->nd_repstat) 3345 error = nfsd->nd_repstat; 3346 else 3347 error = EPROCUNAVAIL; 3348 nfsm_reply(0); 3349 return (0); 3350 } 3351 3352 /* 3353 * Perform access checking for vnodes obtained from file handles that would 3354 * refer to files already opened by a Unix client. You cannot just use 3355 * vn_writechk() and VOP_ACCESS() for two reasons. 3356 * 1 - You must check for exported rdonly as well as MNT_RDONLY for the write case 3357 * 2 - The owner is to be given access irrespective of mode bits for some 3358 * operations, so that processes that chmod after opening a file don't 3359 * break. I don't like this because it opens a security hole, but since 3360 * the nfs server opens a security hole the size of a barn door anyhow, 3361 * what the heck. 3362 * 3363 * The exception to rule 2 is EPERM. If a file is IMMUTABLE, VOP_ACCESS() 3364 * will return EPERM instead of EACCESS. EPERM is always an error. 3365 */ 3366 int 3367 nfsrv_access(vp, flags, cred, rdonly, p, override) 3368 register struct vnode *vp; 3369 int flags; 3370 register struct ucred *cred; 3371 int rdonly; 3372 struct proc *p; 3373 { 3374 struct vattr vattr; 3375 int error; 3376 if (flags & VWRITE) { 3377 /* Just vn_writechk() changed to check rdonly */ 3378 /* 3379 * Disallow write attempts on read-only file systems; 3380 * unless the file is a socket or a block or character 3381 * device resident on the file system. 3382 */ 3383 if (rdonly || (vp->v_mount->mnt_flag & MNT_RDONLY)) { 3384 switch (vp->v_type) { 3385 case VREG: 3386 case VDIR: 3387 case VLNK: 3388 return (EROFS); 3389 default: 3390 break; 3391 } 3392 } 3393 /* 3394 * If there's shared text associated with 3395 * the inode, try to free it up once. If 3396 * we fail, we can't allow writing. 3397 */ 3398 if ((vp->v_flag & VTEXT) && !uvm_vnp_uncache(vp)) 3399 return (ETXTBSY); 3400 } 3401 error = VOP_GETATTR(vp, &vattr, cred, p); 3402 if (error) 3403 return (error); 3404 error = VOP_ACCESS(vp, flags, cred, p); 3405 /* 3406 * Allow certain operations for the owner (reads and writes 3407 * on files that are already open). 3408 */ 3409 if (override && error == EACCES && cred->cr_uid == vattr.va_uid) 3410 error = 0; 3411 return error; 3412 } 3413
Indexes created Tue Sep 23 02:09:52 GMT 2025