nfs_serv.c revision 1.55
1 /* $NetBSD: nfs_serv.c,v 1.55 2000/06/27 17:52:32 mrg Exp $ */ 2 3 /* 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Rick Macklem at The University of Guelph. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)nfs_serv.c 8.8 (Berkeley) 7/31/95 39 */ 40 41 /* 42 * nfs version 2 and 3 server calls to vnode ops 43 * - these routines generally have 3 phases 44 * 1 - break down and validate rpc request in mbuf list 45 * 2 - do the vnode ops for the request 46 * (surprisingly ?? many are very similar to syscalls in vfs_syscalls.c) 47 * 3 - build the rpc reply in an mbuf list 48 * nb: 49 * - do not mix the phases, since the nfsm_?? macros can return failures 50 * on a bad rpc or similar and do not do any vrele() or vput()'s 51 * 52 * - the nfsm_reply() macro generates an nfs rpc reply with the nfs 53 * error number iff error != 0 whereas 54 * returning an error from the server function implies a fatal error 55 * such as a badly constructed rpc request that should be dropped without 56 * a reply. 57 * For Version 3, nfsm_reply() does not return for the error case, since 58 * most version 3 rpcs return more than the status for error cases. 59 */ 60 61 #include <sys/param.h> 62 #include <sys/systm.h> 63 #include <sys/proc.h> 64 #include <sys/file.h> 65 #include <sys/namei.h> 66 #include <sys/vnode.h> 67 #include <sys/mount.h> 68 #include <sys/socket.h> 69 #include <sys/socketvar.h> 70 #include <sys/mbuf.h> 71 #include <sys/dirent.h> 72 #include <sys/stat.h> 73 #include <sys/kernel.h> 74 #include <ufs/ufs/dir.h> 75 76 #include <uvm/uvm_extern.h> 77 78 #include <nfs/nfsproto.h> 79 #include <nfs/rpcv2.h> 80 #include <nfs/nfs.h> 81 #include <nfs/xdr_subs.h> 82 #include <nfs/nfsm_subs.h> 83 #include <nfs/nqnfs.h> 84 #include <nfs/nfs_var.h> 85 86 /* Global vars */ 87 extern u_int32_t nfs_xdrneg1; 88 extern u_int32_t nfs_false, nfs_true; 89 extern enum vtype nv3tov_type[8]; 90 extern struct nfsstats nfsstats; 91 extern nfstype nfsv2_type[9]; 92 extern nfstype nfsv3_type[9]; 93 int nfsrvw_procrastinate = NFS_GATHERDELAY * 1000; 94 95 /* 96 * nfs v3 access service 97 */ 98 int 99 nfsrv3_access(nfsd, slp, procp, mrq) 100 struct nfsrv_descript *nfsd; 101 struct nfssvc_sock *slp; 102 struct proc *procp; 103 struct mbuf **mrq; 104 { 105 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 106 struct mbuf *nam = nfsd->nd_nam; 107 caddr_t dpos = nfsd->nd_dpos; 108 struct ucred *cred = &nfsd->nd_cr; 109 struct vnode *vp; 110 nfsfh_t nfh; 111 fhandle_t *fhp; 112 u_int32_t *tl; 113 int32_t t1; 114 caddr_t bpos; 115 int error = 0, rdonly, cache = 0, getret; 116 char *cp2; 117 struct mbuf *mb, *mreq, *mb2; 118 struct vattr va; 119 u_long inmode, testmode, outmode; 120 u_quad_t frev; 121 122 fhp = &nfh.fh_generic; 123 nfsm_srvmtofh(fhp); 124 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 125 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, &rdonly, 126 (nfsd->nd_flag & ND_KERBAUTH), FALSE); 127 if (error) { 128 nfsm_reply(NFSX_UNSIGNED); 129 nfsm_srvpostop_attr(1, (struct vattr *)0); 130 return (0); 131 } 132 inmode = fxdr_unsigned(u_int32_t, *tl); 133 outmode = 0; 134 if ((inmode & NFSV3ACCESS_READ) && 135 nfsrv_access(vp, VREAD, cred, rdonly, procp, 0) == 0) 136 outmode |= NFSV3ACCESS_READ; 137 if (vp->v_type != VDIR) { 138 testmode = inmode & (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND); 139 if (testmode && 140 nfsrv_access(vp, VWRITE, cred, rdonly, procp, 0) == 0) 141 outmode |= testmode; 142 if ((inmode & NFSV3ACCESS_EXECUTE) && 143 nfsrv_access(vp, VEXEC, cred, rdonly, procp, 0) == 0) 144 outmode |= NFSV3ACCESS_EXECUTE; 145 } else { 146 testmode = inmode & (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | 147 NFSV3ACCESS_DELETE); 148 if (testmode && 149 nfsrv_access(vp, VWRITE, cred, rdonly, procp, 0) == 0) 150 outmode |= testmode; 151 if ((inmode & NFSV3ACCESS_LOOKUP) && 152 nfsrv_access(vp, VEXEC, cred, rdonly, procp, 0) == 0) 153 outmode |= NFSV3ACCESS_LOOKUP; 154 } 155 getret = VOP_GETATTR(vp, &va, cred, procp); 156 vput(vp); 157 nfsm_reply(NFSX_POSTOPATTR(1) + NFSX_UNSIGNED); 158 nfsm_srvpostop_attr(getret, &va); 159 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 160 *tl = txdr_unsigned(outmode); 161 nfsm_srvdone; 162 } 163 164 /* 165 * nfs getattr service 166 */ 167 int 168 nfsrv_getattr(nfsd, slp, procp, mrq) 169 struct nfsrv_descript *nfsd; 170 struct nfssvc_sock *slp; 171 struct proc *procp; 172 struct mbuf **mrq; 173 { 174 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 175 struct mbuf *nam = nfsd->nd_nam; 176 caddr_t dpos = nfsd->nd_dpos; 177 struct ucred *cred = &nfsd->nd_cr; 178 struct nfs_fattr *fp; 179 struct vattr va; 180 struct vnode *vp; 181 nfsfh_t nfh; 182 fhandle_t *fhp; 183 u_int32_t *tl; 184 int32_t t1; 185 caddr_t bpos; 186 int error = 0, rdonly, cache; 187 char *cp2; 188 struct mbuf *mb, *mb2, *mreq; 189 u_quad_t frev; 190 191 fhp = &nfh.fh_generic; 192 nfsm_srvmtofh(fhp); 193 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, &rdonly, 194 (nfsd->nd_flag & ND_KERBAUTH), FALSE); 195 if (error) { 196 nfsm_reply(0); 197 return (0); 198 } 199 nqsrv_getl(vp, ND_READ); 200 error = VOP_GETATTR(vp, &va, cred, procp); 201 vput(vp); 202 nfsm_reply(NFSX_FATTR(nfsd->nd_flag & ND_NFSV3)); 203 if (error) 204 return (0); 205 nfsm_build(fp, struct nfs_fattr *, NFSX_FATTR(nfsd->nd_flag & ND_NFSV3)); 206 nfsm_srvfillattr(&va, fp); 207 nfsm_srvdone; 208 } 209 210 /* 211 * nfs setattr service 212 */ 213 int 214 nfsrv_setattr(nfsd, slp, procp, mrq) 215 struct nfsrv_descript *nfsd; 216 struct nfssvc_sock *slp; 217 struct proc *procp; 218 struct mbuf **mrq; 219 { 220 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 221 struct mbuf *nam = nfsd->nd_nam; 222 caddr_t dpos = nfsd->nd_dpos; 223 struct ucred *cred = &nfsd->nd_cr; 224 struct vattr va, preat; 225 struct nfsv2_sattr *sp; 226 struct nfs_fattr *fp; 227 struct vnode *vp; 228 nfsfh_t nfh; 229 fhandle_t *fhp; 230 u_int32_t *tl; 231 int32_t t1; 232 caddr_t bpos; 233 int error = 0, rdonly, cache, preat_ret = 1, postat_ret = 1; 234 int v3 = (nfsd->nd_flag & ND_NFSV3), gcheck = 0; 235 char *cp2; 236 struct mbuf *mb, *mb2, *mreq; 237 u_quad_t frev; 238 struct timespec guard; 239 240 fhp = &nfh.fh_generic; 241 nfsm_srvmtofh(fhp); 242 VATTR_NULL(&va); 243 if (v3) { 244 nfsm_srvsattr(&va); 245 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 246 gcheck = fxdr_unsigned(int, *tl); 247 if (gcheck) { 248 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 249 fxdr_nfsv3time(tl, &guard); 250 } 251 } else { 252 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 253 /* 254 * Nah nah nah nah na nah 255 * There is a bug in the Sun client that puts 0xffff in the mode 256 * field of sattr when it should put in 0xffffffff. The u_short 257 * doesn't sign extend. 258 * --> check the low order 2 bytes for 0xffff 259 */ 260 if ((fxdr_unsigned(int, sp->sa_mode) & 0xffff) != 0xffff) 261 va.va_mode = nfstov_mode(sp->sa_mode); 262 if (sp->sa_uid != nfs_xdrneg1) 263 va.va_uid = fxdr_unsigned(uid_t, sp->sa_uid); 264 if (sp->sa_gid != nfs_xdrneg1) 265 va.va_gid = fxdr_unsigned(gid_t, sp->sa_gid); 266 if (sp->sa_size != nfs_xdrneg1) 267 va.va_size = fxdr_unsigned(u_quad_t, sp->sa_size); 268 if (sp->sa_atime.nfsv2_sec != nfs_xdrneg1) { 269 #ifdef notyet 270 fxdr_nfsv2time(&sp->sa_atime, &va.va_atime); 271 #else 272 va.va_atime.tv_sec = 273 fxdr_unsigned(u_int32_t,sp->sa_atime.nfsv2_sec); 274 va.va_atime.tv_nsec = 0; 275 #endif 276 } 277 if (sp->sa_mtime.nfsv2_sec != nfs_xdrneg1) 278 fxdr_nfsv2time(&sp->sa_mtime, &va.va_mtime); 279 280 } 281 282 /* 283 * Now that we have all the fields, lets do it. 284 */ 285 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, &rdonly, 286 (nfsd->nd_flag & ND_KERBAUTH), FALSE); 287 if (error) { 288 nfsm_reply(2 * NFSX_UNSIGNED); 289 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 290 return (0); 291 } 292 nqsrv_getl(vp, ND_WRITE); 293 if (v3) { 294 error = preat_ret = VOP_GETATTR(vp, &preat, cred, procp); 295 if (!error && gcheck && 296 (preat.va_ctime.tv_sec != guard.tv_sec || 297 preat.va_ctime.tv_nsec != guard.tv_nsec)) 298 error = NFSERR_NOT_SYNC; 299 if (error) { 300 vput(vp); 301 nfsm_reply(NFSX_WCCDATA(v3)); 302 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 303 return (0); 304 } 305 } 306 307 /* 308 * If the size is being changed write acces is required, otherwise 309 * just check for a read only file system. 310 */ 311 if (va.va_size == ((u_quad_t)((quad_t) -1))) { 312 if (rdonly || (vp->v_mount->mnt_flag & MNT_RDONLY)) { 313 error = EROFS; 314 goto out; 315 } 316 } else { 317 if (vp->v_type == VDIR) { 318 error = EISDIR; 319 goto out; 320 } else if ((error = nfsrv_access(vp, VWRITE, cred, rdonly, 321 procp, 0)) != 0) 322 goto out; 323 } 324 error = VOP_SETATTR(vp, &va, cred, procp); 325 postat_ret = VOP_GETATTR(vp, &va, cred, procp); 326 if (!error) 327 error = postat_ret; 328 out: 329 vput(vp); 330 nfsm_reply(NFSX_WCCORFATTR(v3)); 331 if (v3) { 332 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 333 return (0); 334 } else { 335 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 336 nfsm_srvfillattr(&va, fp); 337 } 338 nfsm_srvdone; 339 } 340 341 /* 342 * nfs lookup rpc 343 */ 344 int 345 nfsrv_lookup(nfsd, slp, procp, mrq) 346 struct nfsrv_descript *nfsd; 347 struct nfssvc_sock *slp; 348 struct proc *procp; 349 struct mbuf **mrq; 350 { 351 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 352 struct mbuf *nam = nfsd->nd_nam; 353 caddr_t dpos = nfsd->nd_dpos; 354 struct ucred *cred = &nfsd->nd_cr; 355 struct nfs_fattr *fp; 356 struct nameidata nd, ind, *ndp = &nd; 357 struct vnode *vp, *dirp; 358 nfsfh_t nfh; 359 fhandle_t *fhp; 360 caddr_t cp; 361 u_int32_t *tl; 362 int32_t t1; 363 caddr_t bpos; 364 int error = 0, cache, len, dirattr_ret = 1; 365 int v3 = (nfsd->nd_flag & ND_NFSV3), pubflag; 366 char *cp2; 367 struct mbuf *mb, *mb2, *mreq; 368 struct vattr va, dirattr; 369 u_quad_t frev; 370 371 fhp = &nfh.fh_generic; 372 nfsm_srvmtofh(fhp); 373 nfsm_srvnamesiz(len); 374 375 pubflag = nfs_ispublicfh(fhp); 376 377 nd.ni_cnd.cn_cred = cred; 378 nd.ni_cnd.cn_nameiop = LOOKUP; 379 nd.ni_cnd.cn_flags = LOCKLEAF | SAVESTART; 380 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 381 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), pubflag); 382 383 if (!error && pubflag) { 384 if (nd.ni_vp->v_type == VDIR && nfs_pub.np_index != NULL) { 385 /* 386 * Setup call to lookup() to see if we can find 387 * the index file. Arguably, this doesn't belong 388 * in a kernel.. Ugh. 389 */ 390 ind = nd; 391 VOP_UNLOCK(nd.ni_vp, 0); 392 ind.ni_pathlen = strlen(nfs_pub.np_index); 393 ind.ni_cnd.cn_nameptr = ind.ni_cnd.cn_pnbuf = 394 nfs_pub.np_index; 395 ind.ni_startdir = nd.ni_vp; 396 VREF(ind.ni_startdir); 397 error = lookup(&ind); 398 if (!error) { 399 /* 400 * Found an index file. Get rid of 401 * the old references. 402 */ 403 if (dirp) 404 vrele(dirp); 405 dirp = nd.ni_vp; 406 vrele(nd.ni_startdir); 407 ndp = &ind; 408 } else 409 error = 0; 410 } 411 /* 412 * If the public filehandle was used, check that this lookup 413 * didn't result in a filehandle outside the publicly exported 414 * filesystem. 415 */ 416 417 if (!error && ndp->ni_vp->v_mount != nfs_pub.np_mount) { 418 vput(nd.ni_vp); 419 error = EPERM; 420 } 421 } 422 423 if (dirp) { 424 if (v3) 425 dirattr_ret = VOP_GETATTR(dirp, &dirattr, cred, 426 procp); 427 vrele(dirp); 428 } 429 430 if (error) { 431 nfsm_reply(NFSX_POSTOPATTR(v3)); 432 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 433 return (0); 434 } 435 436 nqsrv_getl(ndp->ni_startdir, ND_READ); 437 vrele(ndp->ni_startdir); 438 FREE(nd.ni_cnd.cn_pnbuf, M_NAMEI); 439 vp = ndp->ni_vp; 440 memset((caddr_t)fhp, 0, sizeof(nfh)); 441 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; 442 error = VFS_VPTOFH(vp, &fhp->fh_fid); 443 if (!error) 444 error = VOP_GETATTR(vp, &va, cred, procp); 445 vput(vp); 446 nfsm_reply(NFSX_SRVFH(v3) + NFSX_POSTOPORFATTR(v3) + NFSX_POSTOPATTR(v3)); 447 if (error) { 448 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 449 return (0); 450 } 451 nfsm_srvfhtom(fhp, v3); 452 if (v3) { 453 nfsm_srvpostop_attr(0, &va); 454 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 455 } else { 456 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 457 nfsm_srvfillattr(&va, fp); 458 } 459 nfsm_srvdone; 460 } 461 462 /* 463 * nfs readlink service 464 */ 465 int 466 nfsrv_readlink(nfsd, slp, procp, mrq) 467 struct nfsrv_descript *nfsd; 468 struct nfssvc_sock *slp; 469 struct proc *procp; 470 struct mbuf **mrq; 471 { 472 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 473 struct mbuf *nam = nfsd->nd_nam; 474 caddr_t dpos = nfsd->nd_dpos; 475 struct ucred *cred = &nfsd->nd_cr; 476 struct iovec iv[(NFS_MAXPATHLEN+MLEN-1)/MLEN]; 477 struct iovec *ivp = iv; 478 struct mbuf *mp; 479 u_int32_t *tl; 480 int32_t t1; 481 caddr_t bpos; 482 int error = 0, rdonly, cache, i, tlen, len, getret; 483 int v3 = (nfsd->nd_flag & ND_NFSV3); 484 char *cp2; 485 struct mbuf *mb, *mb2, *mp2 = NULL, *mp3 = NULL, *mreq; 486 struct vnode *vp; 487 struct vattr attr; 488 nfsfh_t nfh; 489 fhandle_t *fhp; 490 struct uio io, *uiop = &io; 491 u_quad_t frev; 492 493 fhp = &nfh.fh_generic; 494 nfsm_srvmtofh(fhp); 495 len = 0; 496 i = 0; 497 while (len < NFS_MAXPATHLEN) { 498 MGET(mp, M_WAIT, MT_DATA); 499 MCLGET(mp, M_WAIT); 500 mp->m_len = NFSMSIZ(mp); 501 if (len == 0) 502 mp3 = mp2 = mp; 503 else { 504 mp2->m_next = mp; 505 mp2 = mp; 506 } 507 if ((len+mp->m_len) > NFS_MAXPATHLEN) { 508 mp->m_len = NFS_MAXPATHLEN-len; 509 len = NFS_MAXPATHLEN; 510 } else 511 len += mp->m_len; 512 ivp->iov_base = mtod(mp, caddr_t); 513 ivp->iov_len = mp->m_len; 514 i++; 515 ivp++; 516 } 517 uiop->uio_iov = iv; 518 uiop->uio_iovcnt = i; 519 uiop->uio_offset = 0; 520 uiop->uio_resid = len; 521 uiop->uio_rw = UIO_READ; 522 uiop->uio_segflg = UIO_SYSSPACE; 523 uiop->uio_procp = (struct proc *)0; 524 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 525 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 526 if (error) { 527 m_freem(mp3); 528 nfsm_reply(2 * NFSX_UNSIGNED); 529 nfsm_srvpostop_attr(1, (struct vattr *)0); 530 return (0); 531 } 532 if (vp->v_type != VLNK) { 533 if (v3) 534 error = EINVAL; 535 else 536 error = ENXIO; 537 goto out; 538 } 539 nqsrv_getl(vp, ND_READ); 540 error = VOP_READLINK(vp, uiop, cred); 541 out: 542 getret = VOP_GETATTR(vp, &attr, cred, procp); 543 vput(vp); 544 if (error) 545 m_freem(mp3); 546 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_UNSIGNED); 547 if (v3) { 548 nfsm_srvpostop_attr(getret, &attr); 549 if (error) 550 return (0); 551 } 552 if (uiop->uio_resid > 0) { 553 len -= uiop->uio_resid; 554 tlen = nfsm_rndup(len); 555 nfsm_adj(mp3, NFS_MAXPATHLEN-tlen, tlen-len); 556 } 557 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 558 *tl = txdr_unsigned(len); 559 mb->m_next = mp3; 560 nfsm_srvdone; 561 } 562 563 /* 564 * nfs read service 565 */ 566 int 567 nfsrv_read(nfsd, slp, procp, mrq) 568 struct nfsrv_descript *nfsd; 569 struct nfssvc_sock *slp; 570 struct proc *procp; 571 struct mbuf **mrq; 572 { 573 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 574 struct mbuf *nam = nfsd->nd_nam; 575 caddr_t dpos = nfsd->nd_dpos; 576 struct ucred *cred = &nfsd->nd_cr; 577 struct iovec *iv; 578 struct iovec *iv2; 579 struct mbuf *m; 580 struct nfs_fattr *fp; 581 u_int32_t *tl; 582 int32_t t1; 583 int i; 584 caddr_t bpos; 585 int error = 0, rdonly, cache, cnt, len, left, siz, tlen, getret; 586 int v3 = (nfsd->nd_flag & ND_NFSV3), reqlen; 587 char *cp2; 588 struct mbuf *mb, *mb2, *mreq; 589 struct mbuf *m2; 590 struct vnode *vp; 591 nfsfh_t nfh; 592 fhandle_t *fhp; 593 struct uio io, *uiop = &io; 594 struct vattr va; 595 off_t off; 596 u_quad_t frev; 597 598 fhp = &nfh.fh_generic; 599 nfsm_srvmtofh(fhp); 600 if (v3) { 601 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 602 off = fxdr_hyper(tl); 603 } else { 604 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 605 off = (off_t)fxdr_unsigned(u_int32_t, *tl); 606 } 607 nfsm_srvstrsiz(reqlen, NFS_SRVMAXDATA(nfsd)); 608 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 609 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 610 if (error) { 611 nfsm_reply(2 * NFSX_UNSIGNED); 612 nfsm_srvpostop_attr(1, (struct vattr *)0); 613 return (0); 614 } 615 if (vp->v_type != VREG) { 616 if (v3) 617 error = EINVAL; 618 else 619 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 620 } 621 if (!error) { 622 nqsrv_getl(vp, ND_READ); 623 if ((error = nfsrv_access(vp, VREAD, cred, rdonly, procp, 1)) != 0) 624 error = nfsrv_access(vp, VEXEC, cred, rdonly, procp, 1); 625 } 626 getret = VOP_GETATTR(vp, &va, cred, procp); 627 if (!error) 628 error = getret; 629 if (error) { 630 vput(vp); 631 nfsm_reply(NFSX_POSTOPATTR(v3)); 632 nfsm_srvpostop_attr(getret, &va); 633 return (0); 634 } 635 if (off >= va.va_size) 636 cnt = 0; 637 else if ((off + reqlen) > va.va_size) 638 cnt = nfsm_rndup(va.va_size - off); 639 else 640 cnt = reqlen; 641 nfsm_reply(NFSX_POSTOPORFATTR(v3) + 3 * NFSX_UNSIGNED+nfsm_rndup(cnt)); 642 if (v3) { 643 nfsm_build(tl, u_int32_t *, NFSX_V3FATTR + 4 * NFSX_UNSIGNED); 644 *tl++ = nfs_true; 645 fp = (struct nfs_fattr *)tl; 646 tl += (NFSX_V3FATTR / sizeof (u_int32_t)); 647 } else { 648 nfsm_build(tl, u_int32_t *, NFSX_V2FATTR + NFSX_UNSIGNED); 649 fp = (struct nfs_fattr *)tl; 650 tl += (NFSX_V2FATTR / sizeof (u_int32_t)); 651 } 652 len = left = cnt; 653 if (cnt > 0) { 654 /* 655 * Generate the mbuf list with the uio_iov ref. to it. 656 */ 657 i = 0; 658 m = m2 = mb; 659 while (left > 0) { 660 siz = min(M_TRAILINGSPACE(m), left); 661 if (siz > 0) { 662 left -= siz; 663 i++; 664 } 665 if (left > 0) { 666 MGET(m, M_WAIT, MT_DATA); 667 MCLGET(m, M_WAIT); 668 m->m_len = 0; 669 m2->m_next = m; 670 m2 = m; 671 } 672 } 673 MALLOC(iv, struct iovec *, i * sizeof (struct iovec), 674 M_TEMP, M_WAITOK); 675 uiop->uio_iov = iv2 = iv; 676 m = mb; 677 left = cnt; 678 i = 0; 679 while (left > 0) { 680 if (m == NULL) 681 panic("nfsrv_read iov"); 682 siz = min(M_TRAILINGSPACE(m), left); 683 if (siz > 0) { 684 iv->iov_base = mtod(m, caddr_t) + m->m_len; 685 iv->iov_len = siz; 686 m->m_len += siz; 687 left -= siz; 688 iv++; 689 i++; 690 } 691 m = m->m_next; 692 } 693 uiop->uio_iovcnt = i; 694 uiop->uio_offset = off; 695 uiop->uio_resid = cnt; 696 uiop->uio_rw = UIO_READ; 697 uiop->uio_segflg = UIO_SYSSPACE; 698 error = VOP_READ(vp, uiop, IO_NODELOCKED, cred); 699 off = uiop->uio_offset; 700 FREE((caddr_t)iv2, M_TEMP); 701 if (error || (getret = VOP_GETATTR(vp, &va, cred, procp)) != 0){ 702 if (!error) 703 error = getret; 704 m_freem(mreq); 705 vput(vp); 706 nfsm_reply(NFSX_POSTOPATTR(v3)); 707 nfsm_srvpostop_attr(getret, &va); 708 return (0); 709 } 710 } else 711 uiop->uio_resid = 0; 712 vput(vp); 713 nfsm_srvfillattr(&va, fp); 714 len -= uiop->uio_resid; 715 tlen = nfsm_rndup(len); 716 if (cnt != tlen || tlen != len) 717 nfsm_adj(mb, cnt - tlen, tlen - len); 718 if (v3) { 719 *tl++ = txdr_unsigned(len); 720 if (len < reqlen) 721 *tl++ = nfs_true; 722 else 723 *tl++ = nfs_false; 724 } 725 *tl = txdr_unsigned(len); 726 nfsm_srvdone; 727 } 728 729 /* 730 * nfs write service 731 */ 732 int 733 nfsrv_write(nfsd, slp, procp, mrq) 734 struct nfsrv_descript *nfsd; 735 struct nfssvc_sock *slp; 736 struct proc *procp; 737 struct mbuf **mrq; 738 { 739 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 740 struct mbuf *nam = nfsd->nd_nam; 741 caddr_t dpos = nfsd->nd_dpos; 742 struct ucred *cred = &nfsd->nd_cr; 743 struct iovec *ivp; 744 int i, cnt; 745 struct mbuf *mp; 746 struct nfs_fattr *fp; 747 struct iovec *iv; 748 struct vattr va, forat; 749 u_int32_t *tl; 750 int32_t t1; 751 caddr_t bpos; 752 int error = 0, rdonly, cache, len, forat_ret = 1; 753 int ioflags, aftat_ret = 1, retlen, zeroing, adjust; 754 int stable = NFSV3WRITE_FILESYNC; 755 int v3 = (nfsd->nd_flag & ND_NFSV3); 756 char *cp2; 757 struct mbuf *mb, *mb2, *mreq; 758 struct vnode *vp; 759 nfsfh_t nfh; 760 fhandle_t *fhp; 761 struct uio io, *uiop = &io; 762 off_t off; 763 u_quad_t frev; 764 765 if (mrep == NULL) { 766 *mrq = NULL; 767 return (0); 768 } 769 fhp = &nfh.fh_generic; 770 nfsm_srvmtofh(fhp); 771 if (v3) { 772 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 773 off = fxdr_hyper(tl); 774 tl += 3; 775 stable = fxdr_unsigned(int, *tl++); 776 } else { 777 nfsm_dissect(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 778 off = (off_t)fxdr_unsigned(u_int32_t, *++tl); 779 tl += 2; 780 } 781 retlen = len = fxdr_unsigned(int32_t, *tl); 782 cnt = i = 0; 783 784 /* 785 * For NFS Version 2, it is not obvious what a write of zero length 786 * should do, but I might as well be consistent with Version 3, 787 * which is to return ok so long as there are no permission problems. 788 */ 789 if (len > 0) { 790 zeroing = 1; 791 mp = mrep; 792 while (mp) { 793 if (mp == md) { 794 zeroing = 0; 795 adjust = dpos - mtod(mp, caddr_t); 796 mp->m_len -= adjust; 797 if (mp->m_len > 0 && adjust > 0) 798 NFSMADV(mp, adjust); 799 } 800 if (zeroing) 801 mp->m_len = 0; 802 else if (mp->m_len > 0) { 803 i += mp->m_len; 804 if (i > len) { 805 mp->m_len -= (i - len); 806 zeroing = 1; 807 } 808 if (mp->m_len > 0) 809 cnt++; 810 } 811 mp = mp->m_next; 812 } 813 } 814 if (len > NFS_MAXDATA || len < 0 || i < len) { 815 error = EIO; 816 nfsm_reply(2 * NFSX_UNSIGNED); 817 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 818 return (0); 819 } 820 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 821 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 822 if (error) { 823 nfsm_reply(2 * NFSX_UNSIGNED); 824 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 825 return (0); 826 } 827 if (v3) 828 forat_ret = VOP_GETATTR(vp, &forat, cred, procp); 829 if (vp->v_type != VREG) { 830 if (v3) 831 error = EINVAL; 832 else 833 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 834 } 835 if (!error) { 836 nqsrv_getl(vp, ND_WRITE); 837 error = nfsrv_access(vp, VWRITE, cred, rdonly, procp, 1); 838 } 839 if (error) { 840 vput(vp); 841 nfsm_reply(NFSX_WCCDATA(v3)); 842 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 843 return (0); 844 } 845 846 if (len > 0) { 847 MALLOC(ivp, struct iovec *, cnt * sizeof (struct iovec), M_TEMP, 848 M_WAITOK); 849 uiop->uio_iov = iv = ivp; 850 uiop->uio_iovcnt = cnt; 851 mp = mrep; 852 while (mp) { 853 if (mp->m_len > 0) { 854 ivp->iov_base = mtod(mp, caddr_t); 855 ivp->iov_len = mp->m_len; 856 ivp++; 857 } 858 mp = mp->m_next; 859 } 860 861 /* 862 * XXX 863 * The IO_METASYNC flag indicates that all metadata (and not just 864 * enough to ensure data integrity) mus be written to stable storage 865 * synchronously. 866 * (IO_METASYNC is not yet implemented in 4.4BSD-Lite.) 867 */ 868 if (stable == NFSV3WRITE_UNSTABLE) 869 ioflags = IO_NODELOCKED; 870 else if (stable == NFSV3WRITE_DATASYNC) 871 ioflags = (IO_SYNC | IO_NODELOCKED); 872 else 873 ioflags = (IO_METASYNC | IO_SYNC | IO_NODELOCKED); 874 uiop->uio_resid = len; 875 uiop->uio_rw = UIO_WRITE; 876 uiop->uio_segflg = UIO_SYSSPACE; 877 uiop->uio_procp = (struct proc *)0; 878 uiop->uio_offset = off; 879 error = VOP_WRITE(vp, uiop, ioflags, cred); 880 nfsstats.srvvop_writes++; 881 FREE((caddr_t)iv, M_TEMP); 882 } 883 aftat_ret = VOP_GETATTR(vp, &va, cred, procp); 884 vput(vp); 885 if (!error) 886 error = aftat_ret; 887 nfsm_reply(NFSX_PREOPATTR(v3) + NFSX_POSTOPORFATTR(v3) + 888 2 * NFSX_UNSIGNED + NFSX_WRITEVERF(v3)); 889 if (v3) { 890 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 891 if (error) 892 return (0); 893 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 894 *tl++ = txdr_unsigned(retlen); 895 if (stable == NFSV3WRITE_UNSTABLE) 896 *tl++ = txdr_unsigned(stable); 897 else 898 *tl++ = txdr_unsigned(NFSV3WRITE_FILESYNC); 899 /* 900 * Actually, there is no need to txdr these fields, 901 * but it may make the values more human readable, 902 * for debugging purposes. 903 */ 904 *tl++ = txdr_unsigned(boottime.tv_sec); 905 *tl = txdr_unsigned(boottime.tv_usec); 906 } else { 907 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 908 nfsm_srvfillattr(&va, fp); 909 } 910 nfsm_srvdone; 911 } 912 913 /* 914 * NFS write service with write gathering support. Called when 915 * nfsrvw_procrastinate > 0. 916 * See: Chet Juszczak, "Improving the Write Performance of an NFS Server", 917 * in Proc. of the Winter 1994 Usenix Conference, pg. 247-259, San Franscisco, 918 * Jan. 1994. 919 */ 920 int 921 nfsrv_writegather(ndp, slp, procp, mrq) 922 struct nfsrv_descript **ndp; 923 struct nfssvc_sock *slp; 924 struct proc *procp; 925 struct mbuf **mrq; 926 { 927 struct iovec *ivp; 928 struct mbuf *mp; 929 struct nfsrv_descript *wp, *nfsd, *owp, *swp; 930 struct nfs_fattr *fp; 931 int i = 0; 932 struct iovec *iov; 933 struct nfsrvw_delayhash *wpp; 934 struct ucred *cred; 935 struct vattr va, forat; 936 u_int32_t *tl; 937 int32_t t1; 938 caddr_t bpos, dpos; 939 int error = 0, rdonly, cache, len = 0, forat_ret = 1; 940 int ioflags, aftat_ret = 1, s, adjust, v3, zeroing; 941 char *cp2; 942 struct mbuf *mb, *mb2, *mreq, *mrep, *md; 943 struct vnode *vp; 944 struct uio io, *uiop = &io; 945 u_quad_t frev, cur_usec; 946 947 *mrq = NULL; 948 if (*ndp) { 949 nfsd = *ndp; 950 *ndp = NULL; 951 mrep = nfsd->nd_mrep; 952 md = nfsd->nd_md; 953 dpos = nfsd->nd_dpos; 954 cred = &nfsd->nd_cr; 955 v3 = (nfsd->nd_flag & ND_NFSV3); 956 LIST_INIT(&nfsd->nd_coalesce); 957 nfsd->nd_mreq = NULL; 958 nfsd->nd_stable = NFSV3WRITE_FILESYNC; 959 cur_usec = (u_quad_t)time.tv_sec * 1000000 + (u_quad_t)time.tv_usec; 960 nfsd->nd_time = cur_usec + nfsrvw_procrastinate; 961 962 /* 963 * Now, get the write header.. 964 */ 965 nfsm_srvmtofh(&nfsd->nd_fh); 966 if (v3) { 967 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 968 nfsd->nd_off = fxdr_hyper(tl); 969 tl += 3; 970 nfsd->nd_stable = fxdr_unsigned(int, *tl++); 971 } else { 972 nfsm_dissect(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 973 nfsd->nd_off = (off_t)fxdr_unsigned(u_int32_t, *++tl); 974 tl += 2; 975 } 976 len = fxdr_unsigned(int32_t, *tl); 977 nfsd->nd_len = len; 978 nfsd->nd_eoff = nfsd->nd_off + len; 979 980 /* 981 * Trim the header out of the mbuf list and trim off any trailing 982 * junk so that the mbuf list has only the write data. 983 */ 984 zeroing = 1; 985 i = 0; 986 mp = mrep; 987 while (mp) { 988 if (mp == md) { 989 zeroing = 0; 990 adjust = dpos - mtod(mp, caddr_t); 991 mp->m_len -= adjust; 992 if (mp->m_len > 0 && adjust > 0) 993 NFSMADV(mp, adjust); 994 } 995 if (zeroing) 996 mp->m_len = 0; 997 else { 998 i += mp->m_len; 999 if (i > len) { 1000 mp->m_len -= (i - len); 1001 zeroing = 1; 1002 } 1003 } 1004 mp = mp->m_next; 1005 } 1006 if (len > NFS_MAXDATA || len < 0 || i < len) { 1007 nfsmout: 1008 m_freem(mrep); 1009 error = EIO; 1010 nfsm_writereply(2 * NFSX_UNSIGNED, v3); 1011 if (v3) 1012 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1013 nfsd->nd_mreq = mreq; 1014 nfsd->nd_mrep = NULL; 1015 nfsd->nd_time = 0; 1016 } 1017 1018 /* 1019 * Add this entry to the hash and time queues. 1020 */ 1021 s = splsoftclock(); 1022 owp = NULL; 1023 wp = slp->ns_tq.lh_first; 1024 while (wp && wp->nd_time < nfsd->nd_time) { 1025 owp = wp; 1026 wp = wp->nd_tq.le_next; 1027 } 1028 if (owp) { 1029 LIST_INSERT_AFTER(owp, nfsd, nd_tq); 1030 } else { 1031 LIST_INSERT_HEAD(&slp->ns_tq, nfsd, nd_tq); 1032 } 1033 if (nfsd->nd_mrep) { 1034 wpp = NWDELAYHASH(slp, nfsd->nd_fh.fh_fid.fid_data); 1035 owp = NULL; 1036 wp = wpp->lh_first; 1037 while (wp && 1038 memcmp((caddr_t)&nfsd->nd_fh, (caddr_t)&wp->nd_fh, NFSX_V3FH)) { 1039 owp = wp; 1040 wp = wp->nd_hash.le_next; 1041 } 1042 while (wp && wp->nd_off < nfsd->nd_off && 1043 !memcmp((caddr_t)&nfsd->nd_fh, (caddr_t)&wp->nd_fh, NFSX_V3FH)) { 1044 owp = wp; 1045 wp = wp->nd_hash.le_next; 1046 } 1047 if (owp) { 1048 LIST_INSERT_AFTER(owp, nfsd, nd_hash); 1049 1050 /* 1051 * Search the hash list for overlapping entries and 1052 * coalesce. 1053 */ 1054 for(; nfsd && NFSW_CONTIG(owp, nfsd); nfsd = wp) { 1055 wp = nfsd->nd_hash.le_next; 1056 if (NFSW_SAMECRED(owp, nfsd)) 1057 nfsrvw_coalesce(owp, nfsd); 1058 } 1059 } else { 1060 LIST_INSERT_HEAD(wpp, nfsd, nd_hash); 1061 } 1062 } 1063 splx(s); 1064 } 1065 1066 /* 1067 * Now, do VOP_WRITE()s for any one(s) that need to be done now 1068 * and generate the associated reply mbuf list(s). 1069 */ 1070 loop1: 1071 cur_usec = (u_quad_t)time.tv_sec * 1000000 + (u_quad_t)time.tv_usec; 1072 s = splsoftclock(); 1073 for (nfsd = slp->ns_tq.lh_first; nfsd; nfsd = owp) { 1074 owp = nfsd->nd_tq.le_next; 1075 if (nfsd->nd_time > cur_usec) 1076 break; 1077 if (nfsd->nd_mreq) 1078 continue; 1079 LIST_REMOVE(nfsd, nd_tq); 1080 LIST_REMOVE(nfsd, nd_hash); 1081 splx(s); 1082 mrep = nfsd->nd_mrep; 1083 nfsd->nd_mrep = NULL; 1084 cred = &nfsd->nd_cr; 1085 v3 = (nfsd->nd_flag & ND_NFSV3); 1086 forat_ret = aftat_ret = 1; 1087 error = nfsrv_fhtovp(&nfsd->nd_fh, 1, &vp, cred, slp, 1088 nfsd->nd_nam, &rdonly, (nfsd->nd_flag & ND_KERBAUTH), 1089 FALSE); 1090 if (!error) { 1091 if (v3) 1092 forat_ret = VOP_GETATTR(vp, &forat, cred, procp); 1093 if (vp->v_type != VREG) { 1094 if (v3) 1095 error = EINVAL; 1096 else 1097 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 1098 } 1099 } else 1100 vp = NULL; 1101 if (!error) { 1102 nqsrv_getl(vp, ND_WRITE); 1103 error = nfsrv_access(vp, VWRITE, cred, rdonly, procp, 1); 1104 } 1105 1106 if (nfsd->nd_stable == NFSV3WRITE_UNSTABLE) 1107 ioflags = IO_NODELOCKED; 1108 else if (nfsd->nd_stable == NFSV3WRITE_DATASYNC) 1109 ioflags = (IO_SYNC | IO_NODELOCKED); 1110 else 1111 ioflags = (IO_METASYNC | IO_SYNC | IO_NODELOCKED); 1112 uiop->uio_rw = UIO_WRITE; 1113 uiop->uio_segflg = UIO_SYSSPACE; 1114 uiop->uio_procp = (struct proc *)0; 1115 uiop->uio_offset = nfsd->nd_off; 1116 uiop->uio_resid = nfsd->nd_eoff - nfsd->nd_off; 1117 if (uiop->uio_resid > 0) { 1118 mp = mrep; 1119 i = 0; 1120 while (mp) { 1121 if (mp->m_len > 0) 1122 i++; 1123 mp = mp->m_next; 1124 } 1125 uiop->uio_iovcnt = i; 1126 MALLOC(iov, struct iovec *, i * sizeof (struct iovec), 1127 M_TEMP, M_WAITOK); 1128 uiop->uio_iov = ivp = iov; 1129 mp = mrep; 1130 while (mp) { 1131 if (mp->m_len > 0) { 1132 ivp->iov_base = mtod(mp, caddr_t); 1133 ivp->iov_len = mp->m_len; 1134 ivp++; 1135 } 1136 mp = mp->m_next; 1137 } 1138 if (!error) { 1139 error = VOP_WRITE(vp, uiop, ioflags, cred); 1140 nfsstats.srvvop_writes++; 1141 } 1142 FREE((caddr_t)iov, M_TEMP); 1143 } 1144 m_freem(mrep); 1145 if (vp) { 1146 aftat_ret = VOP_GETATTR(vp, &va, cred, procp); 1147 vput(vp); 1148 } 1149 1150 /* 1151 * Loop around generating replies for all write rpcs that have 1152 * now been completed. 1153 */ 1154 swp = nfsd; 1155 do { 1156 if (error) { 1157 nfsm_writereply(NFSX_WCCDATA(v3), v3); 1158 if (v3) { 1159 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1160 } 1161 } else { 1162 nfsm_writereply(NFSX_PREOPATTR(v3) + 1163 NFSX_POSTOPORFATTR(v3) + 2 * NFSX_UNSIGNED + 1164 NFSX_WRITEVERF(v3), v3); 1165 if (v3) { 1166 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1167 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1168 *tl++ = txdr_unsigned(nfsd->nd_len); 1169 *tl++ = txdr_unsigned(swp->nd_stable); 1170 /* 1171 * Actually, there is no need to txdr these fields, 1172 * but it may make the values more human readable, 1173 * for debugging purposes. 1174 */ 1175 *tl++ = txdr_unsigned(boottime.tv_sec); 1176 *tl = txdr_unsigned(boottime.tv_usec); 1177 } else { 1178 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 1179 nfsm_srvfillattr(&va, fp); 1180 } 1181 } 1182 nfsd->nd_mreq = mreq; 1183 if (nfsd->nd_mrep) 1184 panic("nfsrv_write: nd_mrep not free"); 1185 1186 /* 1187 * Done. Put it at the head of the timer queue so that 1188 * the final phase can return the reply. 1189 */ 1190 s = splsoftclock(); 1191 if (nfsd != swp) { 1192 nfsd->nd_time = 0; 1193 LIST_INSERT_HEAD(&slp->ns_tq, nfsd, nd_tq); 1194 } 1195 nfsd = swp->nd_coalesce.lh_first; 1196 if (nfsd) { 1197 LIST_REMOVE(nfsd, nd_tq); 1198 } 1199 splx(s); 1200 } while (nfsd); 1201 s = splsoftclock(); 1202 swp->nd_time = 0; 1203 LIST_INSERT_HEAD(&slp->ns_tq, swp, nd_tq); 1204 splx(s); 1205 goto loop1; 1206 } 1207 splx(s); 1208 1209 /* 1210 * Search for a reply to return. 1211 */ 1212 s = splsoftclock(); 1213 for (nfsd = slp->ns_tq.lh_first; nfsd; nfsd = nfsd->nd_tq.le_next) 1214 if (nfsd->nd_mreq) { 1215 LIST_REMOVE(nfsd, nd_tq); 1216 *mrq = nfsd->nd_mreq; 1217 *ndp = nfsd; 1218 break; 1219 } 1220 splx(s); 1221 return (0); 1222 } 1223 1224 /* 1225 * Coalesce the write request nfsd into owp. To do this we must: 1226 * - remove nfsd from the queues 1227 * - merge nfsd->nd_mrep into owp->nd_mrep 1228 * - update the nd_eoff and nd_stable for owp 1229 * - put nfsd on owp's nd_coalesce list 1230 * NB: Must be called at splsoftclock(). 1231 */ 1232 void 1233 nfsrvw_coalesce(owp, nfsd) 1234 struct nfsrv_descript *owp; 1235 struct nfsrv_descript *nfsd; 1236 { 1237 int overlap; 1238 struct mbuf *mp; 1239 1240 LIST_REMOVE(nfsd, nd_hash); 1241 LIST_REMOVE(nfsd, nd_tq); 1242 if (owp->nd_eoff < nfsd->nd_eoff) { 1243 overlap = owp->nd_eoff - nfsd->nd_off; 1244 if (overlap < 0) 1245 panic("nfsrv_coalesce: bad off"); 1246 if (overlap > 0) 1247 m_adj(nfsd->nd_mrep, overlap); 1248 mp = owp->nd_mrep; 1249 while (mp->m_next) 1250 mp = mp->m_next; 1251 mp->m_next = nfsd->nd_mrep; 1252 owp->nd_eoff = nfsd->nd_eoff; 1253 } else 1254 m_freem(nfsd->nd_mrep); 1255 nfsd->nd_mrep = NULL; 1256 if (nfsd->nd_stable == NFSV3WRITE_FILESYNC) 1257 owp->nd_stable = NFSV3WRITE_FILESYNC; 1258 else if (nfsd->nd_stable == NFSV3WRITE_DATASYNC && 1259 owp->nd_stable == NFSV3WRITE_UNSTABLE) 1260 owp->nd_stable = NFSV3WRITE_DATASYNC; 1261 LIST_INSERT_HEAD(&owp->nd_coalesce, nfsd, nd_tq); 1262 /* 1263 * nfsd might hold coalesce elements! Move them to owp. 1264 * Otherwise, requests may be lost and clients will be stuck. 1265 */ 1266 if (nfsd->nd_coalesce.lh_first) 1267 { 1268 struct nfsrv_descript *m; 1269 1270 while ((m = nfsd->nd_coalesce.lh_first)) 1271 { 1272 LIST_REMOVE(m, nd_tq); 1273 LIST_INSERT_HEAD(&owp->nd_coalesce, m, nd_tq); 1274 } 1275 } 1276 } 1277 1278 /* 1279 * nfs create service 1280 * now does a truncate to 0 length via. setattr if it already exists 1281 */ 1282 int 1283 nfsrv_create(nfsd, slp, procp, mrq) 1284 struct nfsrv_descript *nfsd; 1285 struct nfssvc_sock *slp; 1286 struct proc *procp; 1287 struct mbuf **mrq; 1288 { 1289 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1290 struct mbuf *nam = nfsd->nd_nam; 1291 caddr_t dpos = nfsd->nd_dpos; 1292 struct ucred *cred = &nfsd->nd_cr; 1293 struct nfs_fattr *fp; 1294 struct vattr va, dirfor, diraft; 1295 struct nfsv2_sattr *sp; 1296 u_int32_t *tl; 1297 struct nameidata nd; 1298 caddr_t cp; 1299 int32_t t1; 1300 caddr_t bpos; 1301 int error = 0, cache, len, tsize, dirfor_ret = 1, diraft_ret = 1; 1302 int rdev = 0; 1303 int v3 = (nfsd->nd_flag & ND_NFSV3), how, exclusive_flag = 0; 1304 char *cp2; 1305 struct mbuf *mb, *mb2, *mreq; 1306 struct vnode *vp = NULL, *dirp = NULL; 1307 nfsfh_t nfh; 1308 fhandle_t *fhp; 1309 u_quad_t frev, tempsize; 1310 u_char cverf[NFSX_V3CREATEVERF]; 1311 1312 nd.ni_cnd.cn_nameiop = 0; 1313 fhp = &nfh.fh_generic; 1314 nfsm_srvmtofh(fhp); 1315 nfsm_srvnamesiz(len); 1316 nd.ni_cnd.cn_cred = cred; 1317 nd.ni_cnd.cn_nameiop = CREATE; 1318 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF | SAVESTART; 1319 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 1320 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1321 if (dirp) { 1322 if (v3) 1323 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 1324 procp); 1325 else { 1326 vrele(dirp); 1327 dirp = (struct vnode *)0; 1328 } 1329 } 1330 if (error) { 1331 nfsm_reply(NFSX_WCCDATA(v3)); 1332 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1333 if (dirp) 1334 vrele(dirp); 1335 return (0); 1336 } 1337 VATTR_NULL(&va); 1338 if (v3) { 1339 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1340 how = fxdr_unsigned(int, *tl); 1341 switch (how) { 1342 case NFSV3CREATE_GUARDED: 1343 if (nd.ni_vp) { 1344 error = EEXIST; 1345 break; 1346 } 1347 case NFSV3CREATE_UNCHECKED: 1348 nfsm_srvsattr(&va); 1349 break; 1350 case NFSV3CREATE_EXCLUSIVE: 1351 nfsm_dissect(cp, caddr_t, NFSX_V3CREATEVERF); 1352 memcpy(cverf, cp, NFSX_V3CREATEVERF); 1353 exclusive_flag = 1; 1354 if (nd.ni_vp == NULL) 1355 va.va_mode = 0; 1356 break; 1357 }; 1358 va.va_type = VREG; 1359 } else { 1360 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1361 va.va_type = IFTOVT(fxdr_unsigned(u_int32_t, sp->sa_mode)); 1362 if (va.va_type == VNON) 1363 va.va_type = VREG; 1364 va.va_mode = nfstov_mode(sp->sa_mode); 1365 switch (va.va_type) { 1366 case VREG: 1367 tsize = fxdr_unsigned(int32_t, sp->sa_size); 1368 if (tsize != -1) 1369 va.va_size = (u_quad_t)tsize; 1370 break; 1371 case VCHR: 1372 case VBLK: 1373 case VFIFO: 1374 rdev = fxdr_unsigned(int32_t, sp->sa_size); 1375 break; 1376 default: 1377 break; 1378 }; 1379 } 1380 1381 /* 1382 * Iff doesn't exist, create it 1383 * otherwise just truncate to 0 length 1384 * should I set the mode too ?? 1385 */ 1386 if (nd.ni_vp == NULL) { 1387 if (va.va_type == VREG || va.va_type == VSOCK) { 1388 vrele(nd.ni_startdir); 1389 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1390 error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1391 if (!error) { 1392 FREE(nd.ni_cnd.cn_pnbuf, M_NAMEI); 1393 if (exclusive_flag) { 1394 exclusive_flag = 0; 1395 VATTR_NULL(&va); 1396 memcpy((caddr_t)&va.va_atime, cverf, 1397 NFSX_V3CREATEVERF); 1398 error = VOP_SETATTR(nd.ni_vp, &va, cred, 1399 procp); 1400 } 1401 } 1402 } else if (va.va_type == VCHR || va.va_type == VBLK || 1403 va.va_type == VFIFO) { 1404 if (va.va_type == VCHR && rdev == 0xffffffff) 1405 va.va_type = VFIFO; 1406 if (va.va_type != VFIFO && 1407 (error = suser(cred, (u_short *)0))) { 1408 vrele(nd.ni_startdir); 1409 free(nd.ni_cnd.cn_pnbuf, M_NAMEI); 1410 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1411 vput(nd.ni_dvp); 1412 nfsm_reply(0); 1413 return (error); 1414 } else 1415 va.va_rdev = (dev_t)rdev; 1416 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1417 error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, 1418 &va); 1419 if (error) { 1420 vrele(nd.ni_startdir); 1421 nfsm_reply(0); 1422 } 1423 nd.ni_cnd.cn_nameiop = LOOKUP; 1424 nd.ni_cnd.cn_flags &= ~(LOCKPARENT | SAVESTART); 1425 nd.ni_cnd.cn_proc = procp; 1426 nd.ni_cnd.cn_cred = cred; 1427 if ((error = lookup(&nd)) != 0) { 1428 free(nd.ni_cnd.cn_pnbuf, M_NAMEI); 1429 nfsm_reply(0); 1430 } 1431 FREE(nd.ni_cnd.cn_pnbuf, M_NAMEI); 1432 if (nd.ni_cnd.cn_flags & ISSYMLINK) { 1433 vrele(nd.ni_dvp); 1434 vput(nd.ni_vp); 1435 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1436 error = EINVAL; 1437 nfsm_reply(0); 1438 } 1439 } else { 1440 vrele(nd.ni_startdir); 1441 free(nd.ni_cnd.cn_pnbuf, M_NAMEI); 1442 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1443 vput(nd.ni_dvp); 1444 error = ENXIO; 1445 } 1446 vp = nd.ni_vp; 1447 } else { 1448 vrele(nd.ni_startdir); 1449 free(nd.ni_cnd.cn_pnbuf, M_NAMEI); 1450 vp = nd.ni_vp; 1451 if (nd.ni_dvp == vp) 1452 vrele(nd.ni_dvp); 1453 else 1454 vput(nd.ni_dvp); 1455 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1456 if (!error && va.va_size != -1) { 1457 error = nfsrv_access(vp, VWRITE, cred, 1458 (nd.ni_cnd.cn_flags & RDONLY), procp, 0); 1459 if (!error) { 1460 nqsrv_getl(vp, ND_WRITE); 1461 tempsize = va.va_size; 1462 VATTR_NULL(&va); 1463 va.va_size = tempsize; 1464 error = VOP_SETATTR(vp, &va, cred, 1465 procp); 1466 } 1467 } 1468 if (error) 1469 vput(vp); 1470 } 1471 if (!error) { 1472 memset((caddr_t)fhp, 0, sizeof(nfh)); 1473 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; 1474 error = VFS_VPTOFH(vp, &fhp->fh_fid); 1475 if (!error) 1476 error = VOP_GETATTR(vp, &va, cred, procp); 1477 vput(vp); 1478 } 1479 if (v3) { 1480 if (exclusive_flag && !error && 1481 memcmp(cverf, (caddr_t)&va.va_atime, NFSX_V3CREATEVERF)) 1482 error = EEXIST; 1483 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 1484 vrele(dirp); 1485 } 1486 nfsm_reply(NFSX_SRVFH(v3) + NFSX_FATTR(v3) + NFSX_WCCDATA(v3)); 1487 if (v3) { 1488 if (!error) { 1489 nfsm_srvpostop_fh(fhp); 1490 nfsm_srvpostop_attr(0, &va); 1491 } 1492 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1493 } else { 1494 nfsm_srvfhtom(fhp, v3); 1495 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 1496 nfsm_srvfillattr(&va, fp); 1497 } 1498 return (0); 1499 nfsmout: 1500 if (dirp) 1501 vrele(dirp); 1502 if (nd.ni_cnd.cn_nameiop) { 1503 vrele(nd.ni_startdir); 1504 free((caddr_t)nd.ni_cnd.cn_pnbuf, M_NAMEI); 1505 } 1506 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1507 if (nd.ni_dvp == nd.ni_vp) 1508 vrele(nd.ni_dvp); 1509 else 1510 vput(nd.ni_dvp); 1511 if (nd.ni_vp) 1512 vput(nd.ni_vp); 1513 return (error); 1514 } 1515 1516 /* 1517 * nfs v3 mknod service 1518 */ 1519 int 1520 nfsrv_mknod(nfsd, slp, procp, mrq) 1521 struct nfsrv_descript *nfsd; 1522 struct nfssvc_sock *slp; 1523 struct proc *procp; 1524 struct mbuf **mrq; 1525 { 1526 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1527 struct mbuf *nam = nfsd->nd_nam; 1528 caddr_t dpos = nfsd->nd_dpos; 1529 struct ucred *cred = &nfsd->nd_cr; 1530 struct vattr va, dirfor, diraft; 1531 u_int32_t *tl; 1532 struct nameidata nd; 1533 int32_t t1; 1534 caddr_t bpos; 1535 int error = 0, cache, len, dirfor_ret = 1, diraft_ret = 1; 1536 u_int32_t major, minor; 1537 enum vtype vtyp; 1538 char *cp2; 1539 struct mbuf *mb, *mb2, *mreq; 1540 struct vnode *vp, *dirp = (struct vnode *)0; 1541 nfsfh_t nfh; 1542 fhandle_t *fhp; 1543 u_quad_t frev; 1544 1545 nd.ni_cnd.cn_nameiop = 0; 1546 fhp = &nfh.fh_generic; 1547 nfsm_srvmtofh(fhp); 1548 nfsm_srvnamesiz(len); 1549 nd.ni_cnd.cn_cred = cred; 1550 nd.ni_cnd.cn_nameiop = CREATE; 1551 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF | SAVESTART; 1552 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 1553 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1554 if (dirp) 1555 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, procp); 1556 if (error) { 1557 nfsm_reply(NFSX_WCCDATA(1)); 1558 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1559 if (dirp) 1560 vrele(dirp); 1561 return (0); 1562 } 1563 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1564 vtyp = nfsv3tov_type(*tl); 1565 if (vtyp != VCHR && vtyp != VBLK && vtyp != VSOCK && vtyp != VFIFO) { 1566 vrele(nd.ni_startdir); 1567 free((caddr_t)nd.ni_cnd.cn_pnbuf, M_NAMEI); 1568 error = NFSERR_BADTYPE; 1569 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1570 if (nd.ni_dvp == nd.ni_vp) 1571 vrele(nd.ni_dvp); 1572 else 1573 vput(nd.ni_dvp); 1574 if (nd.ni_vp) 1575 vput(nd.ni_vp); 1576 goto out; 1577 } 1578 VATTR_NULL(&va); 1579 nfsm_srvsattr(&va); 1580 if (vtyp == VCHR || vtyp == VBLK) { 1581 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1582 major = fxdr_unsigned(u_int32_t, *tl++); 1583 minor = fxdr_unsigned(u_int32_t, *tl); 1584 va.va_rdev = makedev(major, minor); 1585 } 1586 1587 /* 1588 * Iff doesn't exist, create it. 1589 */ 1590 if (nd.ni_vp) { 1591 vrele(nd.ni_startdir); 1592 free((caddr_t)nd.ni_cnd.cn_pnbuf, M_NAMEI); 1593 error = EEXIST; 1594 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1595 if (nd.ni_dvp == nd.ni_vp) 1596 vrele(nd.ni_dvp); 1597 else 1598 vput(nd.ni_dvp); 1599 vput(nd.ni_vp); 1600 goto out; 1601 } 1602 va.va_type = vtyp; 1603 if (vtyp == VSOCK) { 1604 vrele(nd.ni_startdir); 1605 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1606 error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1607 if (!error) 1608 FREE(nd.ni_cnd.cn_pnbuf, M_NAMEI); 1609 } else { 1610 if (va.va_type != VFIFO && 1611 (error = suser(cred, (u_short *)0))) { 1612 vrele(nd.ni_startdir); 1613 free((caddr_t)nd.ni_cnd.cn_pnbuf, M_NAMEI); 1614 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1615 vput(nd.ni_dvp); 1616 goto out; 1617 } 1618 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1619 error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1620 if (error) { 1621 vrele(nd.ni_startdir); 1622 goto out; 1623 } 1624 nd.ni_cnd.cn_nameiop = LOOKUP; 1625 nd.ni_cnd.cn_flags &= ~(LOCKPARENT | SAVESTART); 1626 nd.ni_cnd.cn_proc = procp; 1627 nd.ni_cnd.cn_cred = procp->p_ucred; 1628 error = lookup(&nd); 1629 FREE(nd.ni_cnd.cn_pnbuf, M_NAMEI); 1630 if (error) 1631 goto out; 1632 if (nd.ni_cnd.cn_flags & ISSYMLINK) { 1633 vrele(nd.ni_dvp); 1634 vput(nd.ni_vp); 1635 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1636 error = EINVAL; 1637 } 1638 } 1639 out: 1640 vp = nd.ni_vp; 1641 if (!error) { 1642 memset((caddr_t)fhp, 0, sizeof(nfh)); 1643 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; 1644 error = VFS_VPTOFH(vp, &fhp->fh_fid); 1645 if (!error) 1646 error = VOP_GETATTR(vp, &va, cred, procp); 1647 vput(vp); 1648 } 1649 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 1650 vrele(dirp); 1651 nfsm_reply(NFSX_SRVFH(1) + NFSX_POSTOPATTR(1) + NFSX_WCCDATA(1)); 1652 if (!error) { 1653 nfsm_srvpostop_fh(fhp); 1654 nfsm_srvpostop_attr(0, &va); 1655 } 1656 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1657 return (0); 1658 nfsmout: 1659 if (dirp) 1660 vrele(dirp); 1661 if (nd.ni_cnd.cn_nameiop) { 1662 vrele(nd.ni_startdir); 1663 free((caddr_t)nd.ni_cnd.cn_pnbuf, M_NAMEI); 1664 } 1665 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1666 if (nd.ni_dvp == nd.ni_vp) 1667 vrele(nd.ni_dvp); 1668 else 1669 vput(nd.ni_dvp); 1670 if (nd.ni_vp) 1671 vput(nd.ni_vp); 1672 return (error); 1673 } 1674 1675 /* 1676 * nfs remove service 1677 */ 1678 int 1679 nfsrv_remove(nfsd, slp, procp, mrq) 1680 struct nfsrv_descript *nfsd; 1681 struct nfssvc_sock *slp; 1682 struct proc *procp; 1683 struct mbuf **mrq; 1684 { 1685 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1686 struct mbuf *nam = nfsd->nd_nam; 1687 caddr_t dpos = nfsd->nd_dpos; 1688 struct ucred *cred = &nfsd->nd_cr; 1689 struct nameidata nd; 1690 u_int32_t *tl; 1691 int32_t t1; 1692 caddr_t bpos; 1693 int error = 0, cache, len, dirfor_ret = 1, diraft_ret = 1; 1694 int v3 = (nfsd->nd_flag & ND_NFSV3); 1695 char *cp2; 1696 struct mbuf *mb, *mreq; 1697 struct vnode *vp, *dirp; 1698 struct vattr dirfor, diraft; 1699 nfsfh_t nfh; 1700 fhandle_t *fhp; 1701 u_quad_t frev; 1702 1703 #ifndef nolint 1704 vp = (struct vnode *)0; 1705 #endif 1706 fhp = &nfh.fh_generic; 1707 nfsm_srvmtofh(fhp); 1708 nfsm_srvnamesiz(len); 1709 nd.ni_cnd.cn_cred = cred; 1710 nd.ni_cnd.cn_nameiop = DELETE; 1711 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 1712 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 1713 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1714 if (dirp) { 1715 if (v3) 1716 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 1717 procp); 1718 else 1719 vrele(dirp); 1720 } 1721 if (!error) { 1722 vp = nd.ni_vp; 1723 if (vp->v_type == VDIR && 1724 (error = suser(cred, (u_short *)0)) != 0) 1725 goto out; 1726 /* 1727 * The root of a mounted filesystem cannot be deleted. 1728 */ 1729 if (vp->v_flag & VROOT) { 1730 error = EBUSY; 1731 goto out; 1732 } 1733 out: 1734 if (!error) { 1735 (void)uvm_vnp_uncache(vp); 1736 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1737 nqsrv_getl(vp, ND_WRITE); 1738 error = VOP_REMOVE(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); 1739 } else { 1740 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1741 if (nd.ni_dvp == vp) 1742 vrele(nd.ni_dvp); 1743 else 1744 vput(nd.ni_dvp); 1745 vput(vp); 1746 } 1747 } 1748 if (dirp && v3) { 1749 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 1750 vrele(dirp); 1751 } 1752 nfsm_reply(NFSX_WCCDATA(v3)); 1753 if (v3) { 1754 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1755 return (0); 1756 } 1757 nfsm_srvdone; 1758 } 1759 1760 /* 1761 * nfs rename service 1762 */ 1763 int 1764 nfsrv_rename(nfsd, slp, procp, mrq) 1765 struct nfsrv_descript *nfsd; 1766 struct nfssvc_sock *slp; 1767 struct proc *procp; 1768 struct mbuf **mrq; 1769 { 1770 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1771 struct mbuf *nam = nfsd->nd_nam; 1772 caddr_t dpos = nfsd->nd_dpos; 1773 struct ucred *cred = &nfsd->nd_cr; 1774 u_int32_t *tl; 1775 int32_t t1; 1776 caddr_t bpos; 1777 int error = 0, cache, len, len2, fdirfor_ret = 1, fdiraft_ret = 1; 1778 int tdirfor_ret = 1, tdiraft_ret = 1; 1779 int v3 = (nfsd->nd_flag & ND_NFSV3); 1780 char *cp2; 1781 struct mbuf *mb, *mreq; 1782 struct nameidata fromnd, tond; 1783 struct vnode *fvp, *tvp, *tdvp, *fdirp = (struct vnode *)0; 1784 struct vnode *tdirp = (struct vnode *)0; 1785 struct vattr fdirfor, fdiraft, tdirfor, tdiraft; 1786 nfsfh_t fnfh, tnfh; 1787 fhandle_t *ffhp, *tfhp; 1788 u_quad_t frev; 1789 uid_t saved_uid; 1790 1791 #ifndef nolint 1792 fvp = (struct vnode *)0; 1793 #endif 1794 ffhp = &fnfh.fh_generic; 1795 tfhp = &tnfh.fh_generic; 1796 fromnd.ni_cnd.cn_nameiop = 0; 1797 tond.ni_cnd.cn_nameiop = 0; 1798 nfsm_srvmtofh(ffhp); 1799 nfsm_srvnamesiz(len); 1800 /* 1801 * Remember our original uid so that we can reset cr_uid before 1802 * the second nfs_namei() call, in case it is remapped. 1803 */ 1804 saved_uid = cred->cr_uid; 1805 fromnd.ni_cnd.cn_cred = cred; 1806 fromnd.ni_cnd.cn_nameiop = DELETE; 1807 fromnd.ni_cnd.cn_flags = WANTPARENT | SAVESTART; 1808 error = nfs_namei(&fromnd, ffhp, len, slp, nam, &md, 1809 &dpos, &fdirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1810 if (fdirp) { 1811 if (v3) 1812 fdirfor_ret = VOP_GETATTR(fdirp, &fdirfor, cred, 1813 procp); 1814 else { 1815 vrele(fdirp); 1816 fdirp = (struct vnode *)0; 1817 } 1818 } 1819 if (error) { 1820 nfsm_reply(2 * NFSX_WCCDATA(v3)); 1821 nfsm_srvwcc_data(fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft); 1822 nfsm_srvwcc_data(tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft); 1823 if (fdirp) 1824 vrele(fdirp); 1825 return (0); 1826 } 1827 fvp = fromnd.ni_vp; 1828 nfsm_srvmtofh(tfhp); 1829 nfsm_strsiz(len2, NFS_MAXNAMLEN); 1830 cred->cr_uid = saved_uid; 1831 tond.ni_cnd.cn_cred = cred; 1832 tond.ni_cnd.cn_nameiop = RENAME; 1833 tond.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF | NOCACHE | SAVESTART; 1834 error = nfs_namei(&tond, tfhp, len2, slp, nam, &md, 1835 &dpos, &tdirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1836 if (tdirp) { 1837 if (v3) 1838 tdirfor_ret = VOP_GETATTR(tdirp, &tdirfor, cred, 1839 procp); 1840 else { 1841 vrele(tdirp); 1842 tdirp = (struct vnode *)0; 1843 } 1844 } 1845 if (error) { 1846 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 1847 vrele(fromnd.ni_dvp); 1848 vrele(fvp); 1849 goto out1; 1850 } 1851 tdvp = tond.ni_dvp; 1852 tvp = tond.ni_vp; 1853 if (tvp != NULL) { 1854 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 1855 if (v3) 1856 error = EEXIST; 1857 else 1858 error = EISDIR; 1859 goto out; 1860 } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 1861 if (v3) 1862 error = EEXIST; 1863 else 1864 error = ENOTDIR; 1865 goto out; 1866 } 1867 if (tvp->v_type == VDIR && tvp->v_mountedhere) { 1868 if (v3) 1869 error = EXDEV; 1870 else 1871 error = ENOTEMPTY; 1872 goto out; 1873 } 1874 } 1875 if (fvp->v_type == VDIR && fvp->v_mountedhere) { 1876 if (v3) 1877 error = EXDEV; 1878 else 1879 error = ENOTEMPTY; 1880 goto out; 1881 } 1882 if (fvp->v_mount != tdvp->v_mount) { 1883 if (v3) 1884 error = EXDEV; 1885 else 1886 error = ENOTEMPTY; 1887 goto out; 1888 } 1889 if (fvp == tdvp) { 1890 if (v3) 1891 error = EINVAL; 1892 else 1893 error = ENOTEMPTY; 1894 } 1895 /* 1896 * If source is the same as the destination (that is the 1897 * same vnode with the same name in the same directory), 1898 * then there is nothing to do. 1899 */ 1900 if (fvp == tvp && fromnd.ni_dvp == tdvp && 1901 fromnd.ni_cnd.cn_namelen == tond.ni_cnd.cn_namelen && 1902 !memcmp(fromnd.ni_cnd.cn_nameptr, tond.ni_cnd.cn_nameptr, 1903 fromnd.ni_cnd.cn_namelen)) 1904 error = -1; 1905 out: 1906 if (!error) { 1907 nqsrv_getl(fromnd.ni_dvp, ND_WRITE); 1908 nqsrv_getl(tdvp, ND_WRITE); 1909 if (tvp) { 1910 (void)uvm_vnp_uncache(tvp); 1911 nqsrv_getl(tvp, ND_WRITE); 1912 } 1913 error = VOP_RENAME(fromnd.ni_dvp, fromnd.ni_vp, &fromnd.ni_cnd, 1914 tond.ni_dvp, tond.ni_vp, &tond.ni_cnd); 1915 } else { 1916 VOP_ABORTOP(tond.ni_dvp, &tond.ni_cnd); 1917 if (tdvp == tvp) 1918 vrele(tdvp); 1919 else 1920 vput(tdvp); 1921 if (tvp) 1922 vput(tvp); 1923 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 1924 vrele(fromnd.ni_dvp); 1925 vrele(fvp); 1926 if (error == -1) 1927 error = 0; 1928 } 1929 vrele(tond.ni_startdir); 1930 FREE(tond.ni_cnd.cn_pnbuf, M_NAMEI); 1931 out1: 1932 if (fdirp) { 1933 fdiraft_ret = VOP_GETATTR(fdirp, &fdiraft, cred, procp); 1934 vrele(fdirp); 1935 } 1936 if (tdirp) { 1937 tdiraft_ret = VOP_GETATTR(tdirp, &tdiraft, cred, procp); 1938 vrele(tdirp); 1939 } 1940 vrele(fromnd.ni_startdir); 1941 FREE(fromnd.ni_cnd.cn_pnbuf, M_NAMEI); 1942 nfsm_reply(2 * NFSX_WCCDATA(v3)); 1943 if (v3) { 1944 nfsm_srvwcc_data(fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft); 1945 nfsm_srvwcc_data(tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft); 1946 } 1947 return (0); 1948 1949 nfsmout: 1950 if (fdirp) 1951 vrele(fdirp); 1952 if (tdirp) 1953 vrele(tdirp); 1954 if (tond.ni_cnd.cn_nameiop) { 1955 vrele(tond.ni_startdir); 1956 FREE(tond.ni_cnd.cn_pnbuf, M_NAMEI); 1957 } 1958 if (fromnd.ni_cnd.cn_nameiop) { 1959 vrele(fromnd.ni_startdir); 1960 FREE(fromnd.ni_cnd.cn_pnbuf, M_NAMEI); 1961 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 1962 vrele(fromnd.ni_dvp); 1963 vrele(fvp); 1964 } 1965 return (error); 1966 } 1967 1968 /* 1969 * nfs link service 1970 */ 1971 int 1972 nfsrv_link(nfsd, slp, procp, mrq) 1973 struct nfsrv_descript *nfsd; 1974 struct nfssvc_sock *slp; 1975 struct proc *procp; 1976 struct mbuf **mrq; 1977 { 1978 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1979 struct mbuf *nam = nfsd->nd_nam; 1980 caddr_t dpos = nfsd->nd_dpos; 1981 struct ucred *cred = &nfsd->nd_cr; 1982 struct nameidata nd; 1983 u_int32_t *tl; 1984 int32_t t1; 1985 caddr_t bpos; 1986 int error = 0, rdonly, cache, len, dirfor_ret = 1, diraft_ret = 1; 1987 int getret = 1, v3 = (nfsd->nd_flag & ND_NFSV3); 1988 char *cp2; 1989 struct mbuf *mb, *mreq; 1990 struct vnode *vp, *xp, *dirp = (struct vnode *)0; 1991 struct vattr dirfor, diraft, at; 1992 nfsfh_t nfh, dnfh; 1993 fhandle_t *fhp, *dfhp; 1994 u_quad_t frev; 1995 1996 fhp = &nfh.fh_generic; 1997 dfhp = &dnfh.fh_generic; 1998 nfsm_srvmtofh(fhp); 1999 nfsm_srvmtofh(dfhp); 2000 nfsm_srvnamesiz(len); 2001 error = nfsrv_fhtovp(fhp, FALSE, &vp, cred, slp, nam, 2002 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2003 if (error) { 2004 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2005 nfsm_srvpostop_attr(getret, &at); 2006 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2007 return (0); 2008 } 2009 if (vp->v_type == VDIR && (error = suser(cred, (u_short *)0)) != 0) 2010 goto out1; 2011 nd.ni_cnd.cn_cred = cred; 2012 nd.ni_cnd.cn_nameiop = CREATE; 2013 nd.ni_cnd.cn_flags = LOCKPARENT; 2014 error = nfs_namei(&nd, dfhp, len, slp, nam, &md, &dpos, 2015 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2016 if (dirp) { 2017 if (v3) 2018 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 2019 procp); 2020 else { 2021 vrele(dirp); 2022 dirp = (struct vnode *)0; 2023 } 2024 } 2025 if (error) 2026 goto out1; 2027 xp = nd.ni_vp; 2028 if (xp != NULL) { 2029 error = EEXIST; 2030 goto out; 2031 } 2032 xp = nd.ni_dvp; 2033 if (vp->v_mount != xp->v_mount) 2034 error = EXDEV; 2035 out: 2036 if (!error) { 2037 nqsrv_getl(vp, ND_WRITE); 2038 nqsrv_getl(xp, ND_WRITE); 2039 error = VOP_LINK(nd.ni_dvp, vp, &nd.ni_cnd); 2040 } else { 2041 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2042 if (nd.ni_dvp == nd.ni_vp) 2043 vrele(nd.ni_dvp); 2044 else 2045 vput(nd.ni_dvp); 2046 if (nd.ni_vp) 2047 vrele(nd.ni_vp); 2048 } 2049 out1: 2050 if (v3) 2051 getret = VOP_GETATTR(vp, &at, cred, procp); 2052 if (dirp) { 2053 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 2054 vrele(dirp); 2055 } 2056 vrele(vp); 2057 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2058 if (v3) { 2059 nfsm_srvpostop_attr(getret, &at); 2060 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2061 return (0); 2062 } 2063 nfsm_srvdone; 2064 } 2065 2066 /* 2067 * nfs symbolic link service 2068 */ 2069 int 2070 nfsrv_symlink(nfsd, slp, procp, mrq) 2071 struct nfsrv_descript *nfsd; 2072 struct nfssvc_sock *slp; 2073 struct proc *procp; 2074 struct mbuf **mrq; 2075 { 2076 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2077 struct mbuf *nam = nfsd->nd_nam; 2078 caddr_t dpos = nfsd->nd_dpos; 2079 struct ucred *cred = &nfsd->nd_cr; 2080 struct vattr va, dirfor, diraft; 2081 struct nameidata nd; 2082 u_int32_t *tl; 2083 int32_t t1; 2084 struct nfsv2_sattr *sp; 2085 char *bpos, *pathcp = NULL, *cp2; 2086 struct uio io; 2087 struct iovec iv; 2088 int error = 0, cache, len, len2, dirfor_ret = 1, diraft_ret = 1; 2089 int v3 = (nfsd->nd_flag & ND_NFSV3); 2090 struct mbuf *mb, *mreq, *mb2; 2091 struct vnode *dirp = (struct vnode *)0; 2092 nfsfh_t nfh; 2093 fhandle_t *fhp; 2094 u_quad_t frev; 2095 2096 nd.ni_cnd.cn_nameiop = 0; 2097 fhp = &nfh.fh_generic; 2098 nfsm_srvmtofh(fhp); 2099 nfsm_srvnamesiz(len); 2100 nd.ni_cnd.cn_cred = cred; 2101 nd.ni_cnd.cn_nameiop = CREATE; 2102 nd.ni_cnd.cn_flags = LOCKPARENT | SAVESTART; 2103 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 2104 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2105 if (dirp) { 2106 if (v3) 2107 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 2108 procp); 2109 else { 2110 vrele(dirp); 2111 dirp = (struct vnode *)0; 2112 } 2113 } 2114 if (error) 2115 goto out; 2116 VATTR_NULL(&va); 2117 if (v3) 2118 nfsm_srvsattr(&va); 2119 nfsm_strsiz(len2, NFS_MAXPATHLEN); 2120 MALLOC(pathcp, caddr_t, len2 + 1, M_TEMP, M_WAITOK); 2121 iv.iov_base = pathcp; 2122 iv.iov_len = len2; 2123 io.uio_resid = len2; 2124 io.uio_offset = 0; 2125 io.uio_iov = &iv; 2126 io.uio_iovcnt = 1; 2127 io.uio_segflg = UIO_SYSSPACE; 2128 io.uio_rw = UIO_READ; 2129 io.uio_procp = (struct proc *)0; 2130 nfsm_mtouio(&io, len2); 2131 if (!v3) { 2132 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2133 va.va_mode = fxdr_unsigned(u_int16_t, sp->sa_mode); 2134 } 2135 *(pathcp + len2) = '\0'; 2136 if (nd.ni_vp) { 2137 vrele(nd.ni_startdir); 2138 free(nd.ni_cnd.cn_pnbuf, M_NAMEI); 2139 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2140 if (nd.ni_dvp == nd.ni_vp) 2141 vrele(nd.ni_dvp); 2142 else 2143 vput(nd.ni_dvp); 2144 vrele(nd.ni_vp); 2145 error = EEXIST; 2146 goto out; 2147 } 2148 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2149 error = VOP_SYMLINK(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va, pathcp); 2150 if (error) 2151 vrele(nd.ni_startdir); 2152 else { 2153 if (v3) { 2154 nd.ni_cnd.cn_nameiop = LOOKUP; 2155 nd.ni_cnd.cn_flags &= ~(LOCKPARENT | SAVESTART | FOLLOW); 2156 nd.ni_cnd.cn_flags |= (NOFOLLOW | LOCKLEAF); 2157 nd.ni_cnd.cn_proc = procp; 2158 nd.ni_cnd.cn_cred = cred; 2159 error = lookup(&nd); 2160 if (!error) { 2161 memset((caddr_t)fhp, 0, sizeof(nfh)); 2162 fhp->fh_fsid = nd.ni_vp->v_mount->mnt_stat.f_fsid; 2163 error = VFS_VPTOFH(nd.ni_vp, &fhp->fh_fid); 2164 if (!error) 2165 error = VOP_GETATTR(nd.ni_vp, &va, cred, 2166 procp); 2167 vput(nd.ni_vp); 2168 } 2169 } else 2170 vrele(nd.ni_startdir); 2171 FREE(nd.ni_cnd.cn_pnbuf, M_NAMEI); 2172 } 2173 out: 2174 if (pathcp) 2175 FREE(pathcp, M_TEMP); 2176 if (dirp) { 2177 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 2178 vrele(dirp); 2179 } 2180 nfsm_reply(NFSX_SRVFH(v3) + NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2181 if (v3) { 2182 if (!error) { 2183 nfsm_srvpostop_fh(fhp); 2184 nfsm_srvpostop_attr(0, &va); 2185 } 2186 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2187 } 2188 return (0); 2189 nfsmout: 2190 if (nd.ni_cnd.cn_nameiop) { 2191 vrele(nd.ni_startdir); 2192 free(nd.ni_cnd.cn_pnbuf, M_NAMEI); 2193 } 2194 if (dirp) 2195 vrele(dirp); 2196 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2197 if (nd.ni_dvp == nd.ni_vp) 2198 vrele(nd.ni_dvp); 2199 else 2200 vput(nd.ni_dvp); 2201 if (nd.ni_vp) 2202 vrele(nd.ni_vp); 2203 if (pathcp) 2204 FREE(pathcp, M_TEMP); 2205 return (error); 2206 } 2207 2208 /* 2209 * nfs mkdir service 2210 */ 2211 int 2212 nfsrv_mkdir(nfsd, slp, procp, mrq) 2213 struct nfsrv_descript *nfsd; 2214 struct nfssvc_sock *slp; 2215 struct proc *procp; 2216 struct mbuf **mrq; 2217 { 2218 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2219 struct mbuf *nam = nfsd->nd_nam; 2220 caddr_t dpos = nfsd->nd_dpos; 2221 struct ucred *cred = &nfsd->nd_cr; 2222 struct vattr va, dirfor, diraft; 2223 struct nfs_fattr *fp; 2224 struct nameidata nd; 2225 caddr_t cp; 2226 u_int32_t *tl; 2227 int32_t t1; 2228 caddr_t bpos; 2229 int error = 0, cache, len, dirfor_ret = 1, diraft_ret = 1; 2230 int v3 = (nfsd->nd_flag & ND_NFSV3); 2231 char *cp2; 2232 struct mbuf *mb, *mb2, *mreq; 2233 struct vnode *vp, *dirp = (struct vnode *)0; 2234 nfsfh_t nfh; 2235 fhandle_t *fhp; 2236 u_quad_t frev; 2237 2238 fhp = &nfh.fh_generic; 2239 nfsm_srvmtofh(fhp); 2240 nfsm_srvnamesiz(len); 2241 nd.ni_cnd.cn_cred = cred; 2242 nd.ni_cnd.cn_nameiop = CREATE; 2243 nd.ni_cnd.cn_flags = LOCKPARENT; 2244 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 2245 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2246 if (dirp) { 2247 if (v3) 2248 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 2249 procp); 2250 else { 2251 vrele(dirp); 2252 dirp = (struct vnode *)0; 2253 } 2254 } 2255 if (error) { 2256 nfsm_reply(NFSX_WCCDATA(v3)); 2257 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2258 if (dirp) 2259 vrele(dirp); 2260 return (0); 2261 } 2262 VATTR_NULL(&va); 2263 if (v3) { 2264 nfsm_srvsattr(&va); 2265 } else { 2266 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2267 va.va_mode = nfstov_mode(*tl++); 2268 } 2269 va.va_type = VDIR; 2270 vp = nd.ni_vp; 2271 if (vp != NULL) { 2272 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2273 if (nd.ni_dvp == vp) 2274 vrele(nd.ni_dvp); 2275 else 2276 vput(nd.ni_dvp); 2277 vrele(vp); 2278 error = EEXIST; 2279 goto out; 2280 } 2281 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2282 error = VOP_MKDIR(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 2283 if (!error) { 2284 vp = nd.ni_vp; 2285 memset((caddr_t)fhp, 0, sizeof(nfh)); 2286 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; 2287 error = VFS_VPTOFH(vp, &fhp->fh_fid); 2288 if (!error) 2289 error = VOP_GETATTR(vp, &va, cred, procp); 2290 vput(vp); 2291 } 2292 out: 2293 if (dirp) { 2294 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 2295 vrele(dirp); 2296 } 2297 nfsm_reply(NFSX_SRVFH(v3) + NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2298 if (v3) { 2299 if (!error) { 2300 nfsm_srvpostop_fh(fhp); 2301 nfsm_srvpostop_attr(0, &va); 2302 } 2303 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2304 } else { 2305 nfsm_srvfhtom(fhp, v3); 2306 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 2307 nfsm_srvfillattr(&va, fp); 2308 } 2309 return (0); 2310 nfsmout: 2311 if (dirp) 2312 vrele(dirp); 2313 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2314 if (nd.ni_dvp == nd.ni_vp) 2315 vrele(nd.ni_dvp); 2316 else 2317 vput(nd.ni_dvp); 2318 if (nd.ni_vp) 2319 vrele(nd.ni_vp); 2320 return (error); 2321 } 2322 2323 /* 2324 * nfs rmdir service 2325 */ 2326 int 2327 nfsrv_rmdir(nfsd, slp, procp, mrq) 2328 struct nfsrv_descript *nfsd; 2329 struct nfssvc_sock *slp; 2330 struct proc *procp; 2331 struct mbuf **mrq; 2332 { 2333 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2334 struct mbuf *nam = nfsd->nd_nam; 2335 caddr_t dpos = nfsd->nd_dpos; 2336 struct ucred *cred = &nfsd->nd_cr; 2337 u_int32_t *tl; 2338 int32_t t1; 2339 caddr_t bpos; 2340 int error = 0, cache, len, dirfor_ret = 1, diraft_ret = 1; 2341 int v3 = (nfsd->nd_flag & ND_NFSV3); 2342 char *cp2; 2343 struct mbuf *mb, *mreq; 2344 struct vnode *vp, *dirp = (struct vnode *)0; 2345 struct vattr dirfor, diraft; 2346 nfsfh_t nfh; 2347 fhandle_t *fhp; 2348 struct nameidata nd; 2349 u_quad_t frev; 2350 2351 fhp = &nfh.fh_generic; 2352 nfsm_srvmtofh(fhp); 2353 nfsm_srvnamesiz(len); 2354 nd.ni_cnd.cn_cred = cred; 2355 nd.ni_cnd.cn_nameiop = DELETE; 2356 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 2357 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 2358 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2359 if (dirp) { 2360 if (v3) 2361 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 2362 procp); 2363 else { 2364 vrele(dirp); 2365 dirp = (struct vnode *)0; 2366 } 2367 } 2368 if (error) { 2369 nfsm_reply(NFSX_WCCDATA(v3)); 2370 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2371 if (dirp) 2372 vrele(dirp); 2373 return (0); 2374 } 2375 vp = nd.ni_vp; 2376 if (vp->v_type != VDIR) { 2377 error = ENOTDIR; 2378 goto out; 2379 } 2380 /* 2381 * No rmdir "." please. 2382 */ 2383 if (nd.ni_dvp == vp) { 2384 error = EINVAL; 2385 goto out; 2386 } 2387 /* 2388 * The root of a mounted filesystem cannot be deleted. 2389 */ 2390 if (vp->v_flag & VROOT) 2391 error = EBUSY; 2392 out: 2393 if (!error) { 2394 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2395 nqsrv_getl(vp, ND_WRITE); 2396 error = VOP_RMDIR(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); 2397 } else { 2398 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2399 if (nd.ni_dvp == nd.ni_vp) 2400 vrele(nd.ni_dvp); 2401 else 2402 vput(nd.ni_dvp); 2403 vput(vp); 2404 } 2405 if (dirp) { 2406 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 2407 vrele(dirp); 2408 } 2409 nfsm_reply(NFSX_WCCDATA(v3)); 2410 if (v3) { 2411 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2412 return (0); 2413 } 2414 nfsm_srvdone; 2415 } 2416 2417 /* 2418 * nfs readdir service 2419 * - mallocs what it thinks is enough to read 2420 * count rounded up to a multiple of NFS_DIRBLKSIZ <= NFS_MAXREADDIR 2421 * - calls VOP_READDIR() 2422 * - loops around building the reply 2423 * if the output generated exceeds count break out of loop 2424 * The nfsm_clget macro is used here so that the reply will be packed 2425 * tightly in mbuf clusters. 2426 * - it only knows that it has encountered eof when the VOP_READDIR() 2427 * reads nothing 2428 * - as such one readdir rpc will return eof false although you are there 2429 * and then the next will return eof 2430 * - it trims out records with d_fileno == 0 2431 * this doesn't matter for Unix clients, but they might confuse clients 2432 * for other os'. 2433 * - it trims out records with d_type == DT_WHT 2434 * these cannot be seen through NFS (unless we extend the protocol) 2435 * NB: It is tempting to set eof to true if the VOP_READDIR() reads less 2436 * than requested, but this may not apply to all filesystems. For 2437 * example, client NFS does not { although it is never remote mounted 2438 * anyhow } 2439 * The alternate call nfsrv_readdirplus() does lookups as well. 2440 * PS: The NFS protocol spec. does not clarify what the "count" byte 2441 * argument is a count of.. just name strings and file id's or the 2442 * entire reply rpc or ... 2443 * I tried just file name and id sizes and it confused the Sun client, 2444 * so I am using the full rpc size now. The "paranoia.." comment refers 2445 * to including the status longwords that are not a part of the dir. 2446 * "entry" structures, but are in the rpc. 2447 */ 2448 struct flrep { 2449 nfsuint64 fl_off; 2450 u_int32_t fl_postopok; 2451 u_int32_t fl_fattr[NFSX_V3FATTR / sizeof (u_int32_t)]; 2452 u_int32_t fl_fhok; 2453 u_int32_t fl_fhsize; 2454 u_int32_t fl_nfh[NFSX_V3FH / sizeof (u_int32_t)]; 2455 }; 2456 2457 int 2458 nfsrv_readdir(nfsd, slp, procp, mrq) 2459 struct nfsrv_descript *nfsd; 2460 struct nfssvc_sock *slp; 2461 struct proc *procp; 2462 struct mbuf **mrq; 2463 { 2464 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2465 struct mbuf *nam = nfsd->nd_nam; 2466 caddr_t dpos = nfsd->nd_dpos; 2467 struct ucred *cred = &nfsd->nd_cr; 2468 char *bp, *be; 2469 struct mbuf *mp; 2470 struct dirent *dp; 2471 caddr_t cp; 2472 u_int32_t *tl; 2473 int32_t t1; 2474 caddr_t bpos; 2475 struct mbuf *mb, *mb2, *mreq, *mp2; 2476 char *cpos, *cend, *cp2, *rbuf; 2477 struct vnode *vp; 2478 struct vattr at; 2479 nfsfh_t nfh; 2480 fhandle_t *fhp; 2481 struct uio io; 2482 struct iovec iv; 2483 int len, nlen, rem, xfer, tsiz, i, error = 0, getret = 1; 2484 int siz, cnt, fullsiz, eofflag, rdonly, cache, ncookies; 2485 int v3 = (nfsd->nd_flag & ND_NFSV3); 2486 u_quad_t frev, off, toff, verf; 2487 off_t *cookies = NULL, *cookiep; 2488 nfsuint64 jar; 2489 2490 fhp = &nfh.fh_generic; 2491 nfsm_srvmtofh(fhp); 2492 if (v3) { 2493 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 2494 toff = fxdr_hyper(tl); 2495 tl += 2; 2496 verf = fxdr_hyper(tl); 2497 tl += 2; 2498 } else { 2499 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2500 toff = fxdr_unsigned(u_quad_t, *tl++); 2501 } 2502 off = toff; 2503 cnt = fxdr_unsigned(int, *tl); 2504 siz = ((cnt + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1)); 2505 xfer = NFS_SRVMAXDATA(nfsd); 2506 if (siz > xfer) 2507 siz = xfer; 2508 fullsiz = siz; 2509 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 2510 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2511 if (!error && vp->v_type != VDIR) { 2512 error = ENOTDIR; 2513 vput(vp); 2514 } 2515 if (error) { 2516 nfsm_reply(NFSX_UNSIGNED); 2517 nfsm_srvpostop_attr(getret, &at); 2518 return (0); 2519 } 2520 nqsrv_getl(vp, ND_READ); 2521 if (v3) { 2522 error = getret = VOP_GETATTR(vp, &at, cred, procp); 2523 #ifdef NFS3_STRICTVERF 2524 /* 2525 * XXX This check is too strict for Solaris 2.5 clients. 2526 */ 2527 if (!error && toff && verf != at.va_filerev) 2528 error = NFSERR_BAD_COOKIE; 2529 #endif 2530 } 2531 if (!error) 2532 error = nfsrv_access(vp, VEXEC, cred, rdonly, procp, 0); 2533 if (error) { 2534 vput(vp); 2535 nfsm_reply(NFSX_POSTOPATTR(v3)); 2536 nfsm_srvpostop_attr(getret, &at); 2537 return (0); 2538 } 2539 VOP_UNLOCK(vp, 0); 2540 MALLOC(rbuf, caddr_t, siz, M_TEMP, M_WAITOK); 2541 again: 2542 iv.iov_base = rbuf; 2543 iv.iov_len = fullsiz; 2544 io.uio_iov = &iv; 2545 io.uio_iovcnt = 1; 2546 io.uio_offset = (off_t)off; 2547 io.uio_resid = fullsiz; 2548 io.uio_segflg = UIO_SYSSPACE; 2549 io.uio_rw = UIO_READ; 2550 io.uio_procp = (struct proc *)0; 2551 eofflag = 0; 2552 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2553 2554 error = VOP_READDIR(vp, &io, cred, &eofflag, &cookies, &ncookies); 2555 2556 off = (off_t)io.uio_offset; 2557 if (!cookies && !error) 2558 error = NFSERR_PERM; 2559 if (v3) { 2560 getret = VOP_GETATTR(vp, &at, cred, procp); 2561 if (!error) 2562 error = getret; 2563 } 2564 2565 VOP_UNLOCK(vp, 0); 2566 if (error) { 2567 vrele(vp); 2568 FREE((caddr_t)rbuf, M_TEMP); 2569 if (cookies) 2570 free((caddr_t)cookies, M_TEMP); 2571 nfsm_reply(NFSX_POSTOPATTR(v3)); 2572 nfsm_srvpostop_attr(getret, &at); 2573 return (0); 2574 } 2575 if (io.uio_resid) { 2576 siz -= io.uio_resid; 2577 2578 /* 2579 * If nothing read, return eof 2580 * rpc reply 2581 */ 2582 if (siz == 0) { 2583 vrele(vp); 2584 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_COOKIEVERF(v3) + 2585 2 * NFSX_UNSIGNED); 2586 if (v3) { 2587 nfsm_srvpostop_attr(getret, &at); 2588 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 2589 txdr_hyper(at.va_filerev, tl); 2590 tl += 2; 2591 } else 2592 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2593 *tl++ = nfs_false; 2594 *tl = nfs_true; 2595 FREE((caddr_t)rbuf, M_TEMP); 2596 FREE((caddr_t)cookies, M_TEMP); 2597 return (0); 2598 } 2599 } 2600 2601 /* 2602 * Check for degenerate cases of nothing useful read. 2603 * If so go try again 2604 */ 2605 cpos = rbuf; 2606 cend = rbuf + siz; 2607 dp = (struct dirent *)cpos; 2608 cookiep = cookies; 2609 2610 while (cpos < cend && ncookies > 0 && 2611 (dp->d_fileno == 0 || dp->d_type == DT_WHT)) { 2612 cpos += dp->d_reclen; 2613 dp = (struct dirent *)cpos; 2614 cookiep++; 2615 ncookies--; 2616 } 2617 if (cpos >= cend || ncookies == 0) { 2618 toff = off; 2619 siz = fullsiz; 2620 goto again; 2621 } 2622 2623 len = 3 * NFSX_UNSIGNED; /* paranoia, probably can be 0 */ 2624 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_COOKIEVERF(v3) + siz); 2625 if (v3) { 2626 nfsm_srvpostop_attr(getret, &at); 2627 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2628 txdr_hyper(at.va_filerev, tl); 2629 } 2630 mp = mp2 = mb; 2631 bp = bpos; 2632 be = bp + M_TRAILINGSPACE(mp); 2633 2634 /* Loop through the records and build reply */ 2635 while (cpos < cend && ncookies > 0) { 2636 if (dp->d_fileno != 0 && dp->d_type != DT_WHT) { 2637 nlen = dp->d_namlen; 2638 rem = nfsm_rndup(nlen)-nlen; 2639 len += (4 * NFSX_UNSIGNED + nlen + rem); 2640 if (v3) 2641 len += 2 * NFSX_UNSIGNED; 2642 if (len > cnt) { 2643 eofflag = 0; 2644 break; 2645 } 2646 /* 2647 * Build the directory record xdr from 2648 * the dirent entry. 2649 */ 2650 nfsm_clget; 2651 *tl = nfs_true; 2652 bp += NFSX_UNSIGNED; 2653 if (v3) { 2654 nfsm_clget; 2655 *tl = 0; 2656 bp += NFSX_UNSIGNED; 2657 } 2658 nfsm_clget; 2659 *tl = txdr_unsigned(dp->d_fileno); 2660 bp += NFSX_UNSIGNED; 2661 nfsm_clget; 2662 *tl = txdr_unsigned(nlen); 2663 bp += NFSX_UNSIGNED; 2664 2665 /* And loop around copying the name */ 2666 xfer = nlen; 2667 cp = dp->d_name; 2668 while (xfer > 0) { 2669 nfsm_clget; 2670 if ((bp+xfer) > be) 2671 tsiz = be-bp; 2672 else 2673 tsiz = xfer; 2674 memcpy(bp, cp, tsiz); 2675 bp += tsiz; 2676 xfer -= tsiz; 2677 if (xfer > 0) 2678 cp += tsiz; 2679 } 2680 /* And null pad to an int32_t boundary */ 2681 for (i = 0; i < rem; i++) 2682 *bp++ = '\0'; 2683 nfsm_clget; 2684 2685 /* Finish off the record */ 2686 txdr_hyper(*cookiep, &jar); 2687 if (v3) { 2688 *tl = jar.nfsuquad[0]; 2689 bp += NFSX_UNSIGNED; 2690 nfsm_clget; 2691 } 2692 *tl = jar.nfsuquad[1]; 2693 bp += NFSX_UNSIGNED; 2694 } 2695 cpos += dp->d_reclen; 2696 dp = (struct dirent *)cpos; 2697 cookiep++; 2698 ncookies--; 2699 } 2700 vrele(vp); 2701 nfsm_clget; 2702 *tl = nfs_false; 2703 bp += NFSX_UNSIGNED; 2704 nfsm_clget; 2705 if (eofflag) 2706 *tl = nfs_true; 2707 else 2708 *tl = nfs_false; 2709 bp += NFSX_UNSIGNED; 2710 if (mp != mb) { 2711 if (bp < be) 2712 mp->m_len = bp - mtod(mp, caddr_t); 2713 } else 2714 mp->m_len += bp - bpos; 2715 FREE((caddr_t)rbuf, M_TEMP); 2716 FREE((caddr_t)cookies, M_TEMP); 2717 nfsm_srvdone; 2718 } 2719 2720 int 2721 nfsrv_readdirplus(nfsd, slp, procp, mrq) 2722 struct nfsrv_descript *nfsd; 2723 struct nfssvc_sock *slp; 2724 struct proc *procp; 2725 struct mbuf **mrq; 2726 { 2727 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2728 struct mbuf *nam = nfsd->nd_nam; 2729 caddr_t dpos = nfsd->nd_dpos; 2730 struct ucred *cred = &nfsd->nd_cr; 2731 char *bp, *be; 2732 struct mbuf *mp; 2733 struct dirent *dp; 2734 caddr_t cp; 2735 u_int32_t *tl; 2736 int32_t t1; 2737 caddr_t bpos; 2738 struct mbuf *mb, *mb2, *mreq, *mp2; 2739 char *cpos, *cend, *cp2, *rbuf; 2740 struct vnode *vp, *nvp; 2741 struct flrep fl; 2742 nfsfh_t nfh; 2743 fhandle_t *fhp, *nfhp = (fhandle_t *)fl.fl_nfh; 2744 struct uio io; 2745 struct iovec iv; 2746 struct vattr va, at, *vap = &va; 2747 struct nfs_fattr *fp; 2748 int len, nlen, rem, xfer, tsiz, i, error = 0, getret = 1; 2749 int siz, cnt, fullsiz, eofflag, rdonly, cache, dirlen, ncookies; 2750 u_quad_t frev, off, toff, verf; 2751 off_t *cookies = NULL, *cookiep; 2752 2753 fhp = &nfh.fh_generic; 2754 nfsm_srvmtofh(fhp); 2755 nfsm_dissect(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 2756 toff = fxdr_hyper(tl); 2757 tl += 2; 2758 verf = fxdr_hyper(tl); 2759 tl += 2; 2760 siz = fxdr_unsigned(int, *tl++); 2761 cnt = fxdr_unsigned(int, *tl); 2762 off = toff; 2763 siz = ((siz + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1)); 2764 xfer = NFS_SRVMAXDATA(nfsd); 2765 if (siz > xfer) 2766 siz = xfer; 2767 fullsiz = siz; 2768 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 2769 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2770 if (!error && vp->v_type != VDIR) { 2771 error = ENOTDIR; 2772 vput(vp); 2773 } 2774 if (error) { 2775 nfsm_reply(NFSX_UNSIGNED); 2776 nfsm_srvpostop_attr(getret, &at); 2777 return (0); 2778 } 2779 error = getret = VOP_GETATTR(vp, &at, cred, procp); 2780 #ifdef NFS3_STRICTVERF 2781 /* 2782 * XXX This check is too strict for Solaris 2.5 clients. 2783 */ 2784 if (!error && toff && verf != at.va_filerev) 2785 error = NFSERR_BAD_COOKIE; 2786 #endif 2787 if (!error) { 2788 nqsrv_getl(vp, ND_READ); 2789 error = nfsrv_access(vp, VEXEC, cred, rdonly, procp, 0); 2790 } 2791 if (error) { 2792 vput(vp); 2793 nfsm_reply(NFSX_V3POSTOPATTR); 2794 nfsm_srvpostop_attr(getret, &at); 2795 return (0); 2796 } 2797 VOP_UNLOCK(vp, 0); 2798 2799 MALLOC(rbuf, caddr_t, siz, M_TEMP, M_WAITOK); 2800 again: 2801 iv.iov_base = rbuf; 2802 iv.iov_len = fullsiz; 2803 io.uio_iov = &iv; 2804 io.uio_iovcnt = 1; 2805 io.uio_offset = (off_t)off; 2806 io.uio_resid = fullsiz; 2807 io.uio_segflg = UIO_SYSSPACE; 2808 io.uio_rw = UIO_READ; 2809 io.uio_procp = (struct proc *)0; 2810 eofflag = 0; 2811 2812 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2813 2814 error = VOP_READDIR(vp, &io, cred, &eofflag, &cookies, &ncookies); 2815 2816 off = (u_quad_t)io.uio_offset; 2817 getret = VOP_GETATTR(vp, &at, cred, procp); 2818 2819 VOP_UNLOCK(vp, 0); 2820 2821 /* 2822 * If the VGET operation doesn't work for this filesystem, 2823 * we can't support readdirplus. Returning NOTSUPP should 2824 * make clients fall back to plain readdir. 2825 * There's no need to check for VPTOFH as well, we wouldn't 2826 * even be here otherwise. 2827 */ 2828 if (!getret) { 2829 if ((getret = VFS_VGET(vp->v_mount, at.va_fileid, &nvp))) 2830 getret = (getret == EOPNOTSUPP) ? 2831 NFSERR_NOTSUPP : NFSERR_IO; 2832 else 2833 vput(nvp); 2834 } 2835 2836 if (!cookies && !error) 2837 error = NFSERR_PERM; 2838 if (!error) 2839 error = getret; 2840 if (error) { 2841 vrele(vp); 2842 if (cookies) 2843 FREE((caddr_t)cookies, M_TEMP); 2844 FREE((caddr_t)rbuf, M_TEMP); 2845 nfsm_reply(NFSX_V3POSTOPATTR); 2846 nfsm_srvpostop_attr(getret, &at); 2847 return (0); 2848 } 2849 if (io.uio_resid) { 2850 siz -= io.uio_resid; 2851 2852 /* 2853 * If nothing read, return eof 2854 * rpc reply 2855 */ 2856 if (siz == 0) { 2857 vrele(vp); 2858 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF + 2859 2 * NFSX_UNSIGNED); 2860 nfsm_srvpostop_attr(getret, &at); 2861 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 2862 txdr_hyper(at.va_filerev, tl); 2863 tl += 2; 2864 *tl++ = nfs_false; 2865 *tl = nfs_true; 2866 FREE((caddr_t)cookies, M_TEMP); 2867 FREE((caddr_t)rbuf, M_TEMP); 2868 return (0); 2869 } 2870 } 2871 2872 /* 2873 * Check for degenerate cases of nothing useful read. 2874 * If so go try again 2875 */ 2876 cpos = rbuf; 2877 cend = rbuf + siz; 2878 dp = (struct dirent *)cpos; 2879 cookiep = cookies; 2880 2881 while (cpos < cend && ncookies > 0 && 2882 (dp->d_fileno == 0 || dp->d_type == DT_WHT)) { 2883 cpos += dp->d_reclen; 2884 dp = (struct dirent *)cpos; 2885 cookiep++; 2886 ncookies--; 2887 } 2888 if (cpos >= cend || ncookies == 0) { 2889 toff = off; 2890 siz = fullsiz; 2891 goto again; 2892 } 2893 2894 dirlen = len = NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF + 2 * NFSX_UNSIGNED; 2895 nfsm_reply(cnt); 2896 nfsm_srvpostop_attr(getret, &at); 2897 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2898 txdr_hyper(at.va_filerev, tl); 2899 mp = mp2 = mb; 2900 bp = bpos; 2901 be = bp + M_TRAILINGSPACE(mp); 2902 2903 /* Loop through the records and build reply */ 2904 while (cpos < cend && ncookies > 0) { 2905 if (dp->d_fileno != 0 && dp->d_type != DT_WHT) { 2906 nlen = dp->d_namlen; 2907 rem = nfsm_rndup(nlen)-nlen; 2908 2909 /* 2910 * For readdir_and_lookup get the vnode using 2911 * the file number. 2912 */ 2913 if (VFS_VGET(vp->v_mount, dp->d_fileno, &nvp)) 2914 goto invalid; 2915 memset((caddr_t)nfhp, 0, NFSX_V3FH); 2916 nfhp->fh_fsid = 2917 nvp->v_mount->mnt_stat.f_fsid; 2918 if (VFS_VPTOFH(nvp, &nfhp->fh_fid)) { 2919 vput(nvp); 2920 goto invalid; 2921 } 2922 if (VOP_GETATTR(nvp, vap, cred, procp)) { 2923 vput(nvp); 2924 goto invalid; 2925 } 2926 vput(nvp); 2927 2928 /* 2929 * If either the dircount or maxcount will be 2930 * exceeded, get out now. Both of these lengths 2931 * are calculated conservatively, including all 2932 * XDR overheads. 2933 */ 2934 len += (8 * NFSX_UNSIGNED + nlen + rem + NFSX_V3FH + 2935 NFSX_V3POSTOPATTR); 2936 dirlen += (6 * NFSX_UNSIGNED + nlen + rem); 2937 if (len > cnt || dirlen > fullsiz) { 2938 eofflag = 0; 2939 break; 2940 } 2941 2942 /* 2943 * Build the directory record xdr from 2944 * the dirent entry. 2945 */ 2946 fp = (struct nfs_fattr *)&fl.fl_fattr; 2947 nfsm_srvfillattr(vap, fp); 2948 fl.fl_fhsize = txdr_unsigned(NFSX_V3FH); 2949 fl.fl_fhok = nfs_true; 2950 fl.fl_postopok = nfs_true; 2951 txdr_hyper(*cookiep, fl.fl_off.nfsuquad); 2952 2953 nfsm_clget; 2954 *tl = nfs_true; 2955 bp += NFSX_UNSIGNED; 2956 nfsm_clget; 2957 *tl = 0; 2958 bp += NFSX_UNSIGNED; 2959 nfsm_clget; 2960 *tl = txdr_unsigned(dp->d_fileno); 2961 bp += NFSX_UNSIGNED; 2962 nfsm_clget; 2963 *tl = txdr_unsigned(nlen); 2964 bp += NFSX_UNSIGNED; 2965 2966 /* And loop around copying the name */ 2967 xfer = nlen; 2968 cp = dp->d_name; 2969 while (xfer > 0) { 2970 nfsm_clget; 2971 if ((bp + xfer) > be) 2972 tsiz = be - bp; 2973 else 2974 tsiz = xfer; 2975 memcpy(bp, cp, tsiz); 2976 bp += tsiz; 2977 xfer -= tsiz; 2978 if (xfer > 0) 2979 cp += tsiz; 2980 } 2981 /* And null pad to an int32_t boundary */ 2982 for (i = 0; i < rem; i++) 2983 *bp++ = '\0'; 2984 2985 /* 2986 * Now copy the flrep structure out. 2987 */ 2988 xfer = sizeof (struct flrep); 2989 cp = (caddr_t)&fl; 2990 while (xfer > 0) { 2991 nfsm_clget; 2992 if ((bp + xfer) > be) 2993 tsiz = be - bp; 2994 else 2995 tsiz = xfer; 2996 memcpy(bp, cp, tsiz); 2997 bp += tsiz; 2998 xfer -= tsiz; 2999 if (xfer > 0) 3000 cp += tsiz; 3001 } 3002 } 3003 invalid: 3004 cpos += dp->d_reclen; 3005 dp = (struct dirent *)cpos; 3006 cookiep++; 3007 ncookies--; 3008 } 3009 vrele(vp); 3010 nfsm_clget; 3011 *tl = nfs_false; 3012 bp += NFSX_UNSIGNED; 3013 nfsm_clget; 3014 if (eofflag) 3015 *tl = nfs_true; 3016 else 3017 *tl = nfs_false; 3018 bp += NFSX_UNSIGNED; 3019 if (mp != mb) { 3020 if (bp < be) 3021 mp->m_len = bp - mtod(mp, caddr_t); 3022 } else 3023 mp->m_len += bp - bpos; 3024 FREE((caddr_t)cookies, M_TEMP); 3025 FREE((caddr_t)rbuf, M_TEMP); 3026 nfsm_srvdone; 3027 } 3028 3029 /* 3030 * nfs commit service 3031 */ 3032 int 3033 nfsrv_commit(nfsd, slp, procp, mrq) 3034 struct nfsrv_descript *nfsd; 3035 struct nfssvc_sock *slp; 3036 struct proc *procp; 3037 struct mbuf **mrq; 3038 { 3039 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3040 struct mbuf *nam = nfsd->nd_nam; 3041 caddr_t dpos = nfsd->nd_dpos; 3042 struct ucred *cred = &nfsd->nd_cr; 3043 struct vattr bfor, aft; 3044 struct vnode *vp; 3045 nfsfh_t nfh; 3046 fhandle_t *fhp; 3047 u_int32_t *tl; 3048 int32_t t1; 3049 caddr_t bpos; 3050 int error = 0, rdonly, for_ret = 1, aft_ret = 1, cnt, cache; 3051 char *cp2; 3052 struct mbuf *mb, *mb2, *mreq; 3053 u_quad_t frev, off; 3054 3055 #ifndef nolint 3056 cache = 0; 3057 #endif 3058 fhp = &nfh.fh_generic; 3059 nfsm_srvmtofh(fhp); 3060 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 3061 3062 /* 3063 * XXX At this time VOP_FSYNC() does not accept offset and byte 3064 * count parameters, so these arguments are useless (someday maybe). 3065 */ 3066 off = fxdr_hyper(tl); 3067 tl += 2; 3068 cnt = fxdr_unsigned(int, *tl); 3069 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 3070 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 3071 if (error) { 3072 nfsm_reply(2 * NFSX_UNSIGNED); 3073 nfsm_srvwcc_data(for_ret, &bfor, aft_ret, &aft); 3074 return (0); 3075 } 3076 for_ret = VOP_GETATTR(vp, &bfor, cred, procp); 3077 error = VOP_FSYNC(vp, cred, FSYNC_WAIT, procp); 3078 aft_ret = VOP_GETATTR(vp, &aft, cred, procp); 3079 vput(vp); 3080 nfsm_reply(NFSX_V3WCCDATA + NFSX_V3WRITEVERF); 3081 nfsm_srvwcc_data(for_ret, &bfor, aft_ret, &aft); 3082 if (!error) { 3083 nfsm_build(tl, u_int32_t *, NFSX_V3WRITEVERF); 3084 *tl++ = txdr_unsigned(boottime.tv_sec); 3085 *tl = txdr_unsigned(boottime.tv_usec); 3086 } else 3087 return (0); 3088 nfsm_srvdone; 3089 } 3090 3091 /* 3092 * nfs statfs service 3093 */ 3094 int 3095 nfsrv_statfs(nfsd, slp, procp, mrq) 3096 struct nfsrv_descript *nfsd; 3097 struct nfssvc_sock *slp; 3098 struct proc *procp; 3099 struct mbuf **mrq; 3100 { 3101 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3102 struct mbuf *nam = nfsd->nd_nam; 3103 caddr_t dpos = nfsd->nd_dpos; 3104 struct ucred *cred = &nfsd->nd_cr; 3105 struct statfs *sf; 3106 struct nfs_statfs *sfp; 3107 u_int32_t *tl; 3108 int32_t t1; 3109 caddr_t bpos; 3110 int error = 0, rdonly, cache, getret = 1; 3111 int v3 = (nfsd->nd_flag & ND_NFSV3); 3112 char *cp2; 3113 struct mbuf *mb, *mb2, *mreq; 3114 struct vnode *vp; 3115 struct vattr at; 3116 nfsfh_t nfh; 3117 fhandle_t *fhp; 3118 struct statfs statfs; 3119 u_quad_t frev, tval; 3120 3121 #ifndef nolint 3122 cache = 0; 3123 #endif 3124 fhp = &nfh.fh_generic; 3125 nfsm_srvmtofh(fhp); 3126 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 3127 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 3128 if (error) { 3129 nfsm_reply(NFSX_UNSIGNED); 3130 nfsm_srvpostop_attr(getret, &at); 3131 return (0); 3132 } 3133 sf = &statfs; 3134 error = VFS_STATFS(vp->v_mount, sf, procp); 3135 getret = VOP_GETATTR(vp, &at, cred, procp); 3136 vput(vp); 3137 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_STATFS(v3)); 3138 if (v3) 3139 nfsm_srvpostop_attr(getret, &at); 3140 if (error) 3141 return (0); 3142 nfsm_build(sfp, struct nfs_statfs *, NFSX_STATFS(v3)); 3143 if (v3) { 3144 tval = (u_quad_t)((quad_t)sf->f_blocks * (quad_t)sf->f_bsize); 3145 txdr_hyper(tval, &sfp->sf_tbytes); 3146 tval = (u_quad_t)((quad_t)sf->f_bfree * (quad_t)sf->f_bsize); 3147 txdr_hyper(tval, &sfp->sf_fbytes); 3148 tval = (u_quad_t)((quad_t)sf->f_bavail * (quad_t)sf->f_bsize); 3149 txdr_hyper(tval, &sfp->sf_abytes); 3150 tval = (u_quad_t)sf->f_files; 3151 txdr_hyper(tval, &sfp->sf_tfiles); 3152 tval = (u_quad_t)sf->f_ffree; 3153 txdr_hyper(tval, &sfp->sf_ffiles); 3154 txdr_hyper(tval, &sfp->sf_afiles); 3155 sfp->sf_invarsec = 0; 3156 } else { 3157 sfp->sf_tsize = txdr_unsigned(NFS_MAXDGRAMDATA); 3158 sfp->sf_bsize = txdr_unsigned(sf->f_bsize); 3159 sfp->sf_blocks = txdr_unsigned(sf->f_blocks); 3160 sfp->sf_bfree = txdr_unsigned(sf->f_bfree); 3161 sfp->sf_bavail = txdr_unsigned(sf->f_bavail); 3162 } 3163 nfsm_srvdone; 3164 } 3165 3166 /* 3167 * nfs fsinfo service 3168 */ 3169 int 3170 nfsrv_fsinfo(nfsd, slp, procp, mrq) 3171 struct nfsrv_descript *nfsd; 3172 struct nfssvc_sock *slp; 3173 struct proc *procp; 3174 struct mbuf **mrq; 3175 { 3176 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3177 struct mbuf *nam = nfsd->nd_nam; 3178 caddr_t dpos = nfsd->nd_dpos; 3179 struct ucred *cred = &nfsd->nd_cr; 3180 u_int32_t *tl; 3181 struct nfsv3_fsinfo *sip; 3182 int32_t t1; 3183 caddr_t bpos; 3184 int error = 0, rdonly, cache, getret = 1, pref; 3185 char *cp2; 3186 struct mbuf *mb, *mb2, *mreq; 3187 struct vnode *vp; 3188 struct vattr at; 3189 nfsfh_t nfh; 3190 fhandle_t *fhp; 3191 u_quad_t frev, maxfsize; 3192 struct statfs sb; 3193 3194 #ifndef nolint 3195 cache = 0; 3196 #endif 3197 fhp = &nfh.fh_generic; 3198 nfsm_srvmtofh(fhp); 3199 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 3200 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 3201 if (error) { 3202 nfsm_reply(NFSX_UNSIGNED); 3203 nfsm_srvpostop_attr(getret, &at); 3204 return (0); 3205 } 3206 3207 /* XXX Try to make a guess on the max file size. */ 3208 VFS_STATFS(vp->v_mount, &sb, (struct proc *)0); 3209 maxfsize = (u_quad_t)0x80000000 * sb.f_bsize - 1; 3210 3211 getret = VOP_GETATTR(vp, &at, cred, procp); 3212 vput(vp); 3213 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3FSINFO); 3214 nfsm_srvpostop_attr(getret, &at); 3215 nfsm_build(sip, struct nfsv3_fsinfo *, NFSX_V3FSINFO); 3216 3217 /* 3218 * XXX 3219 * There should be file system VFS OP(s) to get this information. 3220 * For now, assume ufs. 3221 */ 3222 if (slp->ns_so->so_type == SOCK_DGRAM) 3223 pref = NFS_MAXDGRAMDATA; 3224 else 3225 pref = NFS_MAXDATA; 3226 sip->fs_rtmax = txdr_unsigned(NFS_MAXDATA); 3227 sip->fs_rtpref = txdr_unsigned(pref); 3228 sip->fs_rtmult = txdr_unsigned(NFS_FABLKSIZE); 3229 sip->fs_wtmax = txdr_unsigned(NFS_MAXDATA); 3230 sip->fs_wtpref = txdr_unsigned(pref); 3231 sip->fs_wtmult = txdr_unsigned(NFS_FABLKSIZE); 3232 sip->fs_dtpref = txdr_unsigned(pref); 3233 txdr_hyper(maxfsize, &sip->fs_maxfilesize); 3234 sip->fs_timedelta.nfsv3_sec = 0; 3235 sip->fs_timedelta.nfsv3_nsec = txdr_unsigned(1); 3236 sip->fs_properties = txdr_unsigned(NFSV3FSINFO_LINK | 3237 NFSV3FSINFO_SYMLINK | NFSV3FSINFO_HOMOGENEOUS | 3238 NFSV3FSINFO_CANSETTIME); 3239 nfsm_srvdone; 3240 } 3241 3242 /* 3243 * nfs pathconf service 3244 */ 3245 int 3246 nfsrv_pathconf(nfsd, slp, procp, mrq) 3247 struct nfsrv_descript *nfsd; 3248 struct nfssvc_sock *slp; 3249 struct proc *procp; 3250 struct mbuf **mrq; 3251 { 3252 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3253 struct mbuf *nam = nfsd->nd_nam; 3254 caddr_t dpos = nfsd->nd_dpos; 3255 struct ucred *cred = &nfsd->nd_cr; 3256 u_int32_t *tl; 3257 struct nfsv3_pathconf *pc; 3258 int32_t t1; 3259 caddr_t bpos; 3260 int error = 0, rdonly, cache, getret = 1; 3261 register_t linkmax, namemax, chownres, notrunc; 3262 char *cp2; 3263 struct mbuf *mb, *mb2, *mreq; 3264 struct vnode *vp; 3265 struct vattr at; 3266 nfsfh_t nfh; 3267 fhandle_t *fhp; 3268 u_quad_t frev; 3269 3270 #ifndef nolint 3271 cache = 0; 3272 #endif 3273 fhp = &nfh.fh_generic; 3274 nfsm_srvmtofh(fhp); 3275 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 3276 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 3277 if (error) { 3278 nfsm_reply(NFSX_UNSIGNED); 3279 nfsm_srvpostop_attr(getret, &at); 3280 return (0); 3281 } 3282 error = VOP_PATHCONF(vp, _PC_LINK_MAX, &linkmax); 3283 if (!error) 3284 error = VOP_PATHCONF(vp, _PC_NAME_MAX, &namemax); 3285 if (!error) 3286 error = VOP_PATHCONF(vp, _PC_CHOWN_RESTRICTED, &chownres); 3287 if (!error) 3288 error = VOP_PATHCONF(vp, _PC_NO_TRUNC, ¬runc); 3289 getret = VOP_GETATTR(vp, &at, cred, procp); 3290 vput(vp); 3291 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3PATHCONF); 3292 nfsm_srvpostop_attr(getret, &at); 3293 if (error) 3294 return (0); 3295 nfsm_build(pc, struct nfsv3_pathconf *, NFSX_V3PATHCONF); 3296 3297 pc->pc_linkmax = txdr_unsigned(linkmax); 3298 pc->pc_namemax = txdr_unsigned(namemax); 3299 pc->pc_notrunc = txdr_unsigned(notrunc); 3300 pc->pc_chownrestricted = txdr_unsigned(chownres); 3301 3302 /* 3303 * These should probably be supported by VOP_PATHCONF(), but 3304 * until msdosfs is exportable (why would you want to?), the 3305 * Unix defaults should be ok. 3306 */ 3307 pc->pc_caseinsensitive = nfs_false; 3308 pc->pc_casepreserving = nfs_true; 3309 nfsm_srvdone; 3310 } 3311 3312 /* 3313 * Null operation, used by clients to ping server 3314 */ 3315 /* ARGSUSED */ 3316 int 3317 nfsrv_null(nfsd, slp, procp, mrq) 3318 struct nfsrv_descript *nfsd; 3319 struct nfssvc_sock *slp; 3320 struct proc *procp; 3321 struct mbuf **mrq; 3322 { 3323 struct mbuf *mrep = nfsd->nd_mrep; 3324 caddr_t bpos; 3325 int error = NFSERR_RETVOID, cache = 0; 3326 struct mbuf *mb, *mreq; 3327 u_quad_t frev; 3328 3329 nfsm_reply(0); 3330 return (0); 3331 } 3332 3333 /* 3334 * No operation, used for obsolete procedures 3335 */ 3336 /* ARGSUSED */ 3337 int 3338 nfsrv_noop(nfsd, slp, procp, mrq) 3339 struct nfsrv_descript *nfsd; 3340 struct nfssvc_sock *slp; 3341 struct proc *procp; 3342 struct mbuf **mrq; 3343 { 3344 struct mbuf *mrep = nfsd->nd_mrep; 3345 caddr_t bpos; 3346 int error, cache = 0; 3347 struct mbuf *mb, *mreq; 3348 u_quad_t frev; 3349 3350 if (nfsd->nd_repstat) 3351 error = nfsd->nd_repstat; 3352 else 3353 error = EPROCUNAVAIL; 3354 nfsm_reply(0); 3355 return (0); 3356 } 3357 3358 /* 3359 * Perform access checking for vnodes obtained from file handles that would 3360 * refer to files already opened by a Unix client. You cannot just use 3361 * vn_writechk() and VOP_ACCESS() for two reasons. 3362 * 1 - You must check for exported rdonly as well as MNT_RDONLY for the write case 3363 * 2 - The owner is to be given access irrespective of mode bits for some 3364 * operations, so that processes that chmod after opening a file don't 3365 * break. I don't like this because it opens a security hole, but since 3366 * the nfs server opens a security hole the size of a barn door anyhow, 3367 * what the heck. 3368 * 3369 * The exception to rule 2 is EPERM. If a file is IMMUTABLE, VOP_ACCESS() 3370 * will return EPERM instead of EACCESS. EPERM is always an error. 3371 */ 3372 int 3373 nfsrv_access(vp, flags, cred, rdonly, p, override) 3374 struct vnode *vp; 3375 int flags; 3376 struct ucred *cred; 3377 int rdonly; 3378 struct proc *p; 3379 { 3380 struct vattr vattr; 3381 int error; 3382 if (flags & VWRITE) { 3383 /* Just vn_writechk() changed to check rdonly */ 3384 /* 3385 * Disallow write attempts on read-only file systems; 3386 * unless the file is a socket or a block or character 3387 * device resident on the file system. 3388 */ 3389 if (rdonly || (vp->v_mount->mnt_flag & MNT_RDONLY)) { 3390 switch (vp->v_type) { 3391 case VREG: 3392 case VDIR: 3393 case VLNK: 3394 return (EROFS); 3395 default: 3396 break; 3397 } 3398 } 3399 /* 3400 * If there's shared text associated with 3401 * the inode, try to free it up once. If 3402 * we fail, we can't allow writing. 3403 */ 3404 if ((vp->v_flag & VTEXT) && !uvm_vnp_uncache(vp)) 3405 return (ETXTBSY); 3406 } 3407 error = VOP_GETATTR(vp, &vattr, cred, p); 3408 if (error) 3409 return (error); 3410 error = VOP_ACCESS(vp, flags, cred, p); 3411 /* 3412 * Allow certain operations for the owner (reads and writes 3413 * on files that are already open). 3414 */ 3415 if (override && error == EACCES && cred->cr_uid == vattr.va_uid) 3416 error = 0; 3417 return error; 3418 } 3419
Indexes created Thu Oct 02 14:10:14 GMT 2025