nfs_serv.c revision 1.97
1 /* $NetBSD: nfs_serv.c,v 1.97 2005/09/06 09:36:28 jmmv 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. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)nfs_serv.c 8.8 (Berkeley) 7/31/95 35 */ 36 37 /* 38 * nfs version 2 and 3 server calls to vnode ops 39 * - these routines generally have 3 phases 40 * 1 - break down and validate rpc request in mbuf list 41 * 2 - do the vnode ops for the request 42 * (surprisingly ?? many are very similar to syscalls in vfs_syscalls.c) 43 * 3 - build the rpc reply in an mbuf list 44 * nb: 45 * - do not mix the phases, since the nfsm_?? macros can return failures 46 * on a bad rpc or similar and do not do any vrele() or vput()'s 47 * 48 * - the nfsm_reply() macro generates an nfs rpc reply with the nfs 49 * error number iff error != 0 whereas 50 * returning an error from the server function implies a fatal error 51 * such as a badly constructed rpc request that should be dropped without 52 * a reply. 53 * For Version 3, nfsm_reply() does not return for the error case, since 54 * most version 3 rpcs return more than the status for error cases. 55 */ 56 57 #include <sys/cdefs.h> 58 __KERNEL_RCSID(0, "$NetBSD: nfs_serv.c,v 1.97 2005/09/06 09:36:28 jmmv Exp $"); 59 60 #include <sys/param.h> 61 #include <sys/systm.h> 62 #include <sys/proc.h> 63 #include <sys/file.h> 64 #include <sys/namei.h> 65 #include <sys/vnode.h> 66 #include <sys/mount.h> 67 #include <sys/socket.h> 68 #include <sys/socketvar.h> 69 #include <sys/mbuf.h> 70 #include <sys/dirent.h> 71 #include <sys/stat.h> 72 #include <sys/kernel.h> 73 #include <ufs/ufs/dir.h> 74 75 #include <uvm/uvm.h> 76 77 #include <nfs/nfsproto.h> 78 #include <nfs/rpcv2.h> 79 #include <nfs/nfs.h> 80 #include <nfs/xdr_subs.h> 81 #include <nfs/nfsm_subs.h> 82 #include <nfs/nqnfs.h> 83 #include <nfs/nfs_var.h> 84 85 /* Global vars */ 86 extern u_int32_t nfs_xdrneg1; 87 extern u_int32_t nfs_false, nfs_true; 88 extern enum vtype nv3tov_type[8]; 89 extern struct nfsstats nfsstats; 90 extern const nfstype nfsv2_type[9]; 91 extern const nfstype nfsv3_type[9]; 92 int nfsrvw_procrastinate = NFS_GATHERDELAY * 1000; 93 int nfsd_use_loan = 1; /* use page-loan for READ OP */ 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; 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, *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, *mreq; 237 u_quad_t frev; 238 struct timespec guard; 239 struct mount *mp = NULL; 240 241 fhp = &nfh.fh_generic; 242 nfsm_srvmtofh(fhp); 243 if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) 244 return (ESTALE); 245 vn_start_write(NULL, &mp, V_WAIT); 246 VATTR_NULL(&va); 247 if (v3) { 248 nfsm_srvsattr(&va); 249 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 250 gcheck = fxdr_unsigned(int, *tl); 251 if (gcheck) { 252 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 253 fxdr_nfsv3time(tl, &guard); 254 } 255 } else { 256 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 257 /* 258 * Nah nah nah nah na nah 259 * There is a bug in the Sun client that puts 0xffff in the mode 260 * field of sattr when it should put in 0xffffffff. The u_short 261 * doesn't sign extend. 262 * --> check the low order 2 bytes for 0xffff 263 */ 264 if ((fxdr_unsigned(int, sp->sa_mode) & 0xffff) != 0xffff) 265 va.va_mode = nfstov_mode(sp->sa_mode); 266 if (sp->sa_uid != nfs_xdrneg1) 267 va.va_uid = fxdr_unsigned(uid_t, sp->sa_uid); 268 if (sp->sa_gid != nfs_xdrneg1) 269 va.va_gid = fxdr_unsigned(gid_t, sp->sa_gid); 270 if (sp->sa_size != nfs_xdrneg1) 271 va.va_size = fxdr_unsigned(u_quad_t, sp->sa_size); 272 if (sp->sa_atime.nfsv2_sec != nfs_xdrneg1) { 273 #ifdef notyet 274 fxdr_nfsv2time(&sp->sa_atime, &va.va_atime); 275 #else 276 va.va_atime.tv_sec = 277 fxdr_unsigned(u_int32_t,sp->sa_atime.nfsv2_sec); 278 va.va_atime.tv_nsec = 0; 279 #endif 280 } 281 if (sp->sa_mtime.nfsv2_sec != nfs_xdrneg1) 282 fxdr_nfsv2time(&sp->sa_mtime, &va.va_mtime); 283 284 } 285 286 /* 287 * Now that we have all the fields, lets do it. 288 */ 289 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, &rdonly, 290 (nfsd->nd_flag & ND_KERBAUTH), FALSE); 291 if (error) { 292 nfsm_reply(2 * NFSX_UNSIGNED); 293 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 294 vn_finished_write(mp, 0); 295 return (0); 296 } 297 nqsrv_getl(vp, ND_WRITE); 298 if (v3) { 299 error = preat_ret = VOP_GETATTR(vp, &preat, cred, procp); 300 if (!error && gcheck && 301 (preat.va_ctime.tv_sec != guard.tv_sec || 302 preat.va_ctime.tv_nsec != guard.tv_nsec)) 303 error = NFSERR_NOT_SYNC; 304 if (error) { 305 vput(vp); 306 nfsm_reply(NFSX_WCCDATA(v3)); 307 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 308 vn_finished_write(mp, 0); 309 return (0); 310 } 311 } 312 313 /* 314 * If the size is being changed write acces is required, otherwise 315 * just check for a read only file system. 316 */ 317 if (va.va_size == ((u_quad_t)((quad_t) -1))) { 318 if (rdonly || (vp->v_mount->mnt_flag & MNT_RDONLY)) { 319 error = EROFS; 320 goto out; 321 } 322 } else { 323 if (vp->v_type == VDIR) { 324 error = EISDIR; 325 goto out; 326 } else if ((error = nfsrv_access(vp, VWRITE, cred, rdonly, 327 procp, 0)) != 0) 328 goto out; 329 } 330 error = VOP_SETATTR(vp, &va, cred, procp); 331 postat_ret = VOP_GETATTR(vp, &va, cred, procp); 332 if (!error) 333 error = postat_ret; 334 out: 335 vput(vp); 336 vn_finished_write(mp, 0); 337 nfsm_reply(NFSX_WCCORFATTR(v3)); 338 if (v3) { 339 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 340 return (0); 341 } else { 342 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 343 nfsm_srvfillattr(&va, fp); 344 } 345 nfsm_srvdone; 346 } 347 348 /* 349 * nfs lookup rpc 350 */ 351 int 352 nfsrv_lookup(nfsd, slp, procp, mrq) 353 struct nfsrv_descript *nfsd; 354 struct nfssvc_sock *slp; 355 struct proc *procp; 356 struct mbuf **mrq; 357 { 358 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 359 struct mbuf *nam = nfsd->nd_nam; 360 caddr_t dpos = nfsd->nd_dpos; 361 struct ucred *cred = &nfsd->nd_cr; 362 struct nfs_fattr *fp; 363 struct nameidata nd, ind, *ndp = &nd; 364 struct vnode *vp, *dirp; 365 nfsfh_t nfh; 366 fhandle_t *fhp; 367 caddr_t cp; 368 u_int32_t *tl; 369 int32_t t1; 370 caddr_t bpos; 371 int error = 0, cache, dirattr_ret = 1; 372 uint32_t len; 373 int v3 = (nfsd->nd_flag & ND_NFSV3), pubflag; 374 char *cp2; 375 struct mbuf *mb, *mreq; 376 struct vattr va, dirattr; 377 u_quad_t frev; 378 379 fhp = &nfh.fh_generic; 380 nfsm_srvmtofh(fhp); 381 nfsm_srvnamesiz(len); 382 383 pubflag = nfs_ispublicfh(fhp); 384 385 nd.ni_cnd.cn_cred = cred; 386 nd.ni_cnd.cn_nameiop = LOOKUP; 387 nd.ni_cnd.cn_flags = LOCKLEAF | SAVESTART; 388 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 389 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), pubflag); 390 391 if (!error && pubflag) { 392 if (nd.ni_vp->v_type == VDIR && nfs_pub.np_index != NULL) { 393 /* 394 * Setup call to lookup() to see if we can find 395 * the index file. Arguably, this doesn't belong 396 * in a kernel.. Ugh. 397 */ 398 ind = nd; 399 VOP_UNLOCK(nd.ni_vp, 0); 400 ind.ni_pathlen = strlen(nfs_pub.np_index); 401 ind.ni_cnd.cn_nameptr = ind.ni_cnd.cn_pnbuf = 402 nfs_pub.np_index; 403 ind.ni_startdir = nd.ni_vp; 404 VREF(ind.ni_startdir); 405 error = lookup(&ind); 406 if (!error) { 407 /* 408 * Found an index file. Get rid of 409 * the old references. 410 */ 411 if (dirp) 412 vrele(dirp); 413 dirp = nd.ni_vp; 414 vrele(nd.ni_startdir); 415 ndp = &ind; 416 } else 417 error = 0; 418 } 419 /* 420 * If the public filehandle was used, check that this lookup 421 * didn't result in a filehandle outside the publicly exported 422 * filesystem. 423 */ 424 425 if (!error && ndp->ni_vp->v_mount != nfs_pub.np_mount) { 426 vput(nd.ni_vp); 427 error = EPERM; 428 } 429 } 430 431 if (dirp) { 432 if (v3) 433 dirattr_ret = VOP_GETATTR(dirp, &dirattr, cred, 434 procp); 435 vrele(dirp); 436 } 437 438 if (error) { 439 nfsm_reply(NFSX_POSTOPATTR(v3)); 440 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 441 return (0); 442 } 443 444 nqsrv_getl(ndp->ni_startdir, ND_READ); 445 vrele(ndp->ni_startdir); 446 PNBUF_PUT(nd.ni_cnd.cn_pnbuf); 447 vp = ndp->ni_vp; 448 memset((caddr_t)fhp, 0, sizeof(nfh)); 449 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsidx; 450 error = VFS_VPTOFH(vp, &fhp->fh_fid); 451 if (!error) 452 error = VOP_GETATTR(vp, &va, cred, procp); 453 vput(vp); 454 nfsm_reply(NFSX_SRVFH(v3) + NFSX_POSTOPORFATTR(v3) + NFSX_POSTOPATTR(v3)); 455 if (error) { 456 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 457 return (0); 458 } 459 nfsm_srvfhtom(fhp, v3); 460 if (v3) { 461 nfsm_srvpostop_attr(0, &va); 462 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 463 } else { 464 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 465 nfsm_srvfillattr(&va, fp); 466 } 467 nfsm_srvdone; 468 } 469 470 /* 471 * nfs readlink service 472 */ 473 int 474 nfsrv_readlink(nfsd, slp, procp, mrq) 475 struct nfsrv_descript *nfsd; 476 struct nfssvc_sock *slp; 477 struct proc *procp; 478 struct mbuf **mrq; 479 { 480 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 481 struct mbuf *nam = nfsd->nd_nam; 482 caddr_t dpos = nfsd->nd_dpos; 483 struct ucred *cred = &nfsd->nd_cr; 484 struct iovec iv[(NFS_MAXPATHLEN+MLEN-1)/MLEN]; 485 struct iovec *ivp = iv; 486 struct mbuf *mp; 487 u_int32_t *tl; 488 int32_t t1; 489 caddr_t bpos; 490 int error = 0, rdonly, cache, i, padlen, getret; 491 uint32_t len; 492 int v3 = (nfsd->nd_flag & ND_NFSV3); 493 char *cp2; 494 struct mbuf *mb, *mp2 = NULL, *mp3 = NULL, *mreq; 495 struct vnode *vp; 496 struct vattr attr; 497 nfsfh_t nfh; 498 fhandle_t *fhp; 499 struct uio io, *uiop = &io; 500 u_quad_t frev; 501 502 fhp = &nfh.fh_generic; 503 nfsm_srvmtofh(fhp); 504 len = 0; 505 i = 0; 506 while (len < NFS_MAXPATHLEN) { 507 mp = m_get(M_WAIT, MT_DATA); 508 MCLAIM(mp, &nfs_mowner); 509 m_clget(mp, M_WAIT); 510 mp->m_len = NFSMSIZ(mp); 511 if (len == 0) 512 mp3 = mp2 = mp; 513 else { 514 mp2->m_next = mp; 515 mp2 = mp; 516 } 517 if ((len+mp->m_len) > NFS_MAXPATHLEN) { 518 mp->m_len = NFS_MAXPATHLEN-len; 519 len = NFS_MAXPATHLEN; 520 } else 521 len += mp->m_len; 522 ivp->iov_base = mtod(mp, caddr_t); 523 ivp->iov_len = mp->m_len; 524 i++; 525 ivp++; 526 } 527 uiop->uio_iov = iv; 528 uiop->uio_iovcnt = i; 529 uiop->uio_offset = 0; 530 uiop->uio_resid = len; 531 uiop->uio_rw = UIO_READ; 532 uiop->uio_segflg = UIO_SYSSPACE; 533 uiop->uio_procp = NULL; 534 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 535 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 536 if (error) { 537 m_freem(mp3); 538 nfsm_reply(2 * NFSX_UNSIGNED); 539 nfsm_srvpostop_attr(1, (struct vattr *)0); 540 return (0); 541 } 542 if (vp->v_type != VLNK) { 543 if (v3) 544 error = EINVAL; 545 else 546 error = ENXIO; 547 goto out; 548 } 549 nqsrv_getl(vp, ND_READ); 550 error = VOP_READLINK(vp, uiop, cred); 551 out: 552 getret = VOP_GETATTR(vp, &attr, cred, procp); 553 vput(vp); 554 if (error) 555 m_freem(mp3); 556 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_UNSIGNED); 557 if (v3) { 558 nfsm_srvpostop_attr(getret, &attr); 559 if (error) 560 return (0); 561 } 562 len -= uiop->uio_resid; 563 padlen = nfsm_padlen(len); 564 if (uiop->uio_resid || padlen) 565 nfs_zeropad(mp3, uiop->uio_resid, padlen); 566 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 567 *tl = txdr_unsigned(len); 568 mb->m_next = mp3; 569 nfsm_srvdone; 570 } 571 572 /* 573 * nfs read service 574 */ 575 int 576 nfsrv_read(nfsd, slp, procp, mrq) 577 struct nfsrv_descript *nfsd; 578 struct nfssvc_sock *slp; 579 struct proc *procp; 580 struct mbuf **mrq; 581 { 582 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 583 struct mbuf *nam = nfsd->nd_nam; 584 caddr_t dpos = nfsd->nd_dpos; 585 struct ucred *cred = &nfsd->nd_cr; 586 struct mbuf *m; 587 struct nfs_fattr *fp; 588 u_int32_t *tl; 589 int32_t t1; 590 int i; 591 caddr_t bpos; 592 int error = 0, rdonly, cache, getret; 593 int v3 = (nfsd->nd_flag & ND_NFSV3); 594 uint32_t reqlen, len, cnt, left; 595 int padlen; 596 char *cp2; 597 struct mbuf *mb, *mreq; 598 struct vnode *vp; 599 nfsfh_t nfh; 600 fhandle_t *fhp; 601 struct uio io, *uiop = &io; 602 struct vattr va; 603 off_t off; 604 u_quad_t frev; 605 606 fhp = &nfh.fh_generic; 607 nfsm_srvmtofh(fhp); 608 if (v3) { 609 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 610 off = fxdr_hyper(tl); 611 } else { 612 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 613 off = (off_t)fxdr_unsigned(u_int32_t, *tl); 614 } 615 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 616 reqlen = fxdr_unsigned(uint32_t, *tl); 617 reqlen = MIN(reqlen, NFS_SRVMAXDATA(nfsd)); 618 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 619 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 620 if (error) { 621 nfsm_reply(2 * NFSX_UNSIGNED); 622 nfsm_srvpostop_attr(1, (struct vattr *)0); 623 return (0); 624 } 625 if (vp->v_type != VREG) { 626 if (v3) 627 error = EINVAL; 628 else 629 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 630 } 631 if (!error) { 632 nqsrv_getl(vp, ND_READ); 633 if ((error = nfsrv_access(vp, VREAD, cred, rdonly, procp, 1)) != 0) 634 error = nfsrv_access(vp, VEXEC, cred, rdonly, procp, 1); 635 } 636 getret = VOP_GETATTR(vp, &va, cred, procp); 637 if (!error) 638 error = getret; 639 if (error) { 640 vput(vp); 641 nfsm_reply(NFSX_POSTOPATTR(v3)); 642 nfsm_srvpostop_attr(getret, &va); 643 return (0); 644 } 645 if (off >= va.va_size) 646 cnt = 0; 647 else if ((off + reqlen) > va.va_size) 648 cnt = va.va_size - off; 649 else 650 cnt = reqlen; 651 nfsm_reply(NFSX_POSTOPORFATTR(v3) + 3 * NFSX_UNSIGNED+nfsm_rndup(cnt)); 652 if (v3) { 653 nfsm_build(tl, u_int32_t *, NFSX_V3FATTR + 4 * NFSX_UNSIGNED); 654 *tl++ = nfs_true; 655 fp = (struct nfs_fattr *)tl; 656 tl += (NFSX_V3FATTR / sizeof (u_int32_t)); 657 } else { 658 nfsm_build(tl, u_int32_t *, NFSX_V2FATTR + NFSX_UNSIGNED); 659 fp = (struct nfs_fattr *)tl; 660 tl += (NFSX_V2FATTR / sizeof (u_int32_t)); 661 } 662 len = left = cnt; 663 if (cnt > 0) { 664 if (nfsd_use_loan) { 665 struct vm_page **pgpp; 666 voff_t pgoff = trunc_page(off); 667 int npages; 668 vaddr_t lva; 669 670 npages = (round_page(off + cnt) - pgoff) >> PAGE_SHIFT; 671 KASSERT(npages <= M_EXT_MAXPAGES); /* XXX */ 672 673 /* allocate kva for mbuf data */ 674 lva = sokvaalloc(npages << PAGE_SHIFT, slp->ns_so); 675 if (lva == 0) { 676 /* fall back to VOP_READ */ 677 goto loan_fail; 678 } 679 680 /* allocate mbuf */ 681 m = m_get(M_WAIT, MT_DATA); 682 MCLAIM(m, &nfs_mowner); 683 pgpp = m->m_ext.ext_pgs; 684 685 /* loan pages */ 686 error = uvm_loanuobjpages(&vp->v_uobj, pgoff, npages, 687 pgpp); 688 if (error) { 689 sokvafree(lva, npages << PAGE_SHIFT); 690 m_free(m); 691 if (error == EBUSY) 692 goto loan_fail; 693 goto read_error; 694 } 695 696 /* associate kva to mbuf */ 697 MEXTADD(m, (void *)(lva + ((vaddr_t)off & PAGE_MASK)), 698 cnt, M_MBUF, soloanfree, slp->ns_so); 699 m->m_flags |= M_EXT_PAGES | M_EXT_ROMAP; 700 m->m_len = cnt; 701 702 /* map pages */ 703 for (i = 0; i < npages; i++) { 704 pmap_kenter_pa(lva, VM_PAGE_TO_PHYS(pgpp[i]), 705 VM_PROT_READ); 706 lva += PAGE_SIZE; 707 } 708 709 pmap_update(pmap_kernel()); 710 711 mb->m_next = m; 712 mb = m; 713 error = 0; 714 uiop->uio_resid = 0; 715 } else { 716 struct iovec *iv; 717 struct iovec *iv2; 718 struct mbuf *m2; 719 int siz; 720 loan_fail: 721 /* 722 * Generate the mbuf list with the uio_iov ref. to it. 723 */ 724 i = 0; 725 m = m2 = mb; 726 while (left > 0) { 727 siz = min(M_TRAILINGSPACE(m), left); 728 if (siz > 0) { 729 left -= siz; 730 i++; 731 } 732 if (left > 0) { 733 m = m_get(M_WAIT, MT_DATA); 734 MCLAIM(m, &nfs_mowner); 735 m_clget(m, M_WAIT); 736 m->m_len = 0; 737 m2->m_next = m; 738 m2 = m; 739 } 740 } 741 iv = malloc(i * sizeof(struct iovec), M_TEMP, M_WAITOK); 742 uiop->uio_iov = iv2 = iv; 743 m = mb; 744 left = cnt; 745 i = 0; 746 while (left > 0) { 747 if (m == NULL) 748 panic("nfsrv_read iov"); 749 siz = min(M_TRAILINGSPACE(m), left); 750 if (siz > 0) { 751 iv->iov_base = mtod(m, caddr_t) + 752 m->m_len; 753 iv->iov_len = siz; 754 m->m_len += siz; 755 left -= siz; 756 iv++; 757 i++; 758 } 759 m = m->m_next; 760 } 761 uiop->uio_iovcnt = i; 762 uiop->uio_offset = off; 763 uiop->uio_resid = cnt; 764 uiop->uio_rw = UIO_READ; 765 uiop->uio_segflg = UIO_SYSSPACE; 766 error = VOP_READ(vp, uiop, IO_NODELOCKED, cred); 767 free((caddr_t)iv2, M_TEMP); 768 } 769 read_error: 770 if (error || (getret = VOP_GETATTR(vp, &va, cred, procp)) != 0){ 771 if (!error) 772 error = getret; 773 m_freem(mreq); 774 vput(vp); 775 nfsm_reply(NFSX_POSTOPATTR(v3)); 776 nfsm_srvpostop_attr(getret, &va); 777 return (0); 778 } 779 } else { 780 uiop->uio_resid = 0; 781 } 782 vput(vp); 783 nfsm_srvfillattr(&va, fp); 784 len -= uiop->uio_resid; 785 padlen = nfsm_padlen(len); 786 if (uiop->uio_resid || padlen) 787 nfs_zeropad(mb, uiop->uio_resid, padlen); 788 if (v3) { 789 /* count */ 790 *tl++ = txdr_unsigned(len); 791 /* eof */ 792 if (off + len >= va.va_size) 793 *tl++ = nfs_true; 794 else 795 *tl++ = nfs_false; 796 } 797 *tl = txdr_unsigned(len); 798 nfsm_srvdone; 799 } 800 801 /* 802 * nfs write service 803 */ 804 int 805 nfsrv_write(nfsd, slp, procp, mrq) 806 struct nfsrv_descript *nfsd; 807 struct nfssvc_sock *slp; 808 struct proc *procp; 809 struct mbuf **mrq; 810 { 811 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 812 struct mbuf *nam = nfsd->nd_nam; 813 caddr_t dpos = nfsd->nd_dpos; 814 struct ucred *cred = &nfsd->nd_cr; 815 struct iovec *ivp; 816 int i, cnt; 817 struct mbuf *mp; 818 struct nfs_fattr *fp; 819 struct iovec *iv; 820 struct vattr va, forat; 821 u_int32_t *tl; 822 int32_t t1; 823 caddr_t bpos; 824 int error = 0, rdonly, cache, len, forat_ret = 1; 825 int ioflags, aftat_ret = 1, retlen, zeroing, adjust; 826 int stable = NFSV3WRITE_FILESYNC; 827 int v3 = (nfsd->nd_flag & ND_NFSV3); 828 char *cp2; 829 struct mbuf *mb, *mreq; 830 struct vnode *vp; 831 nfsfh_t nfh; 832 fhandle_t *fhp; 833 struct uio io, *uiop = &io; 834 off_t off; 835 u_quad_t frev; 836 struct mount *mntp = NULL; 837 838 if (mrep == NULL) { 839 *mrq = NULL; 840 return (0); 841 } 842 fhp = &nfh.fh_generic; 843 nfsm_srvmtofh(fhp); 844 if ((mntp = vfs_getvfs(&fhp->fh_fsid)) == NULL) 845 return (ESTALE); 846 vn_start_write(NULL, &mntp, V_WAIT); 847 if (v3) { 848 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 849 off = fxdr_hyper(tl); 850 tl += 3; 851 stable = fxdr_unsigned(int, *tl++); 852 } else { 853 nfsm_dissect(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 854 off = (off_t)fxdr_unsigned(u_int32_t, *++tl); 855 tl += 2; 856 } 857 retlen = len = fxdr_unsigned(int32_t, *tl); 858 cnt = i = 0; 859 860 /* 861 * For NFS Version 2, it is not obvious what a write of zero length 862 * should do, but I might as well be consistent with Version 3, 863 * which is to return ok so long as there are no permission problems. 864 */ 865 if (len > 0) { 866 zeroing = 1; 867 mp = mrep; 868 while (mp) { 869 if (mp == md) { 870 zeroing = 0; 871 adjust = dpos - mtod(mp, caddr_t); 872 mp->m_len -= adjust; 873 if (mp->m_len > 0 && adjust > 0) 874 NFSMADV(mp, adjust); 875 } 876 if (zeroing) 877 mp->m_len = 0; 878 else if (mp->m_len > 0) { 879 i += mp->m_len; 880 if (i > len) { 881 mp->m_len -= (i - len); 882 zeroing = 1; 883 } 884 if (mp->m_len > 0) 885 cnt++; 886 } 887 mp = mp->m_next; 888 } 889 } 890 if (len > NFS_MAXDATA || len < 0 || i < len) { 891 error = EIO; 892 nfsm_reply(2 * NFSX_UNSIGNED); 893 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 894 vn_finished_write(mntp, 0); 895 return (0); 896 } 897 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 898 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 899 if (error) { 900 nfsm_reply(2 * NFSX_UNSIGNED); 901 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 902 vn_finished_write(mntp, 0); 903 return (0); 904 } 905 if (v3) 906 forat_ret = VOP_GETATTR(vp, &forat, cred, procp); 907 if (vp->v_type != VREG) { 908 if (v3) 909 error = EINVAL; 910 else 911 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 912 } 913 if (!error) { 914 nqsrv_getl(vp, ND_WRITE); 915 error = nfsrv_access(vp, VWRITE, cred, rdonly, procp, 1); 916 } 917 if (error) { 918 vput(vp); 919 nfsm_reply(NFSX_WCCDATA(v3)); 920 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 921 vn_finished_write(mntp, 0); 922 return (0); 923 } 924 925 if (len > 0) { 926 ivp = malloc(cnt * sizeof (struct iovec), M_TEMP, M_WAITOK); 927 uiop->uio_iov = iv = ivp; 928 uiop->uio_iovcnt = cnt; 929 mp = mrep; 930 while (mp) { 931 if (mp->m_len > 0) { 932 ivp->iov_base = mtod(mp, caddr_t); 933 ivp->iov_len = mp->m_len; 934 ivp++; 935 } 936 mp = mp->m_next; 937 } 938 939 /* 940 * XXX 941 * The IO_METASYNC flag indicates that all metadata (and not 942 * just enough to ensure data integrity) must be written to 943 * stable storage synchronously. 944 * (IO_METASYNC is not yet implemented in 4.4BSD-Lite.) 945 */ 946 if (stable == NFSV3WRITE_UNSTABLE) 947 ioflags = IO_NODELOCKED; 948 else if (stable == NFSV3WRITE_DATASYNC) 949 ioflags = (IO_SYNC | IO_NODELOCKED); 950 else 951 ioflags = (IO_METASYNC | IO_SYNC | IO_NODELOCKED); 952 uiop->uio_resid = len; 953 uiop->uio_rw = UIO_WRITE; 954 uiop->uio_segflg = UIO_SYSSPACE; 955 uiop->uio_procp = NULL; 956 uiop->uio_offset = off; 957 error = VOP_WRITE(vp, uiop, ioflags, cred); 958 nfsstats.srvvop_writes++; 959 free(iv, M_TEMP); 960 } 961 aftat_ret = VOP_GETATTR(vp, &va, cred, procp); 962 vput(vp); 963 vn_finished_write(mntp, 0); 964 if (!error) 965 error = aftat_ret; 966 nfsm_reply(NFSX_PREOPATTR(v3) + NFSX_POSTOPORFATTR(v3) + 967 2 * NFSX_UNSIGNED + NFSX_WRITEVERF(v3)); 968 if (v3) { 969 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 970 if (error) 971 return (0); 972 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 973 *tl++ = txdr_unsigned(retlen); 974 if (stable == NFSV3WRITE_UNSTABLE) 975 *tl++ = txdr_unsigned(stable); 976 else 977 *tl++ = txdr_unsigned(NFSV3WRITE_FILESYNC); 978 /* 979 * Actually, there is no need to txdr these fields, 980 * but it may make the values more human readable, 981 * for debugging purposes. 982 */ 983 *tl++ = txdr_unsigned(boottime.tv_sec); 984 *tl = txdr_unsigned(boottime.tv_usec); 985 } else { 986 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 987 nfsm_srvfillattr(&va, fp); 988 } 989 nfsm_srvdone; 990 } 991 992 /* 993 * NFS write service with write gathering support. Called when 994 * nfsrvw_procrastinate > 0. 995 * See: Chet Juszczak, "Improving the Write Performance of an NFS Server", 996 * in Proc. of the Winter 1994 Usenix Conference, pg. 247-259, San Franscisco, 997 * Jan. 1994. 998 */ 999 int 1000 nfsrv_writegather(ndp, slp, procp, mrq) 1001 struct nfsrv_descript **ndp; 1002 struct nfssvc_sock *slp; 1003 struct proc *procp; 1004 struct mbuf **mrq; 1005 { 1006 struct iovec *ivp; 1007 struct mbuf *mp; 1008 struct nfsrv_descript *wp, *nfsd, *owp, *swp; 1009 struct nfs_fattr *fp; 1010 int i = 0; 1011 struct iovec *iov; 1012 struct nfsrvw_delayhash *wpp; 1013 struct ucred *cred; 1014 struct vattr va, forat; 1015 u_int32_t *tl; 1016 int32_t t1; 1017 caddr_t bpos, dpos; 1018 int error = 0, rdonly, cache, len = 0, forat_ret = 1; 1019 int ioflags, aftat_ret = 1, s, adjust, v3, zeroing; 1020 char *cp2; 1021 struct mbuf *mb, *mreq, *mrep, *md; 1022 struct vnode *vp; 1023 struct uio io, *uiop = &io; 1024 u_quad_t frev, cur_usec; 1025 struct mount *mntp = NULL; 1026 1027 *mrq = NULL; 1028 if (*ndp) { 1029 nfsd = *ndp; 1030 *ndp = NULL; 1031 mrep = nfsd->nd_mrep; 1032 md = nfsd->nd_md; 1033 dpos = nfsd->nd_dpos; 1034 cred = &nfsd->nd_cr; 1035 v3 = (nfsd->nd_flag & ND_NFSV3); 1036 LIST_INIT(&nfsd->nd_coalesce); 1037 nfsd->nd_mreq = NULL; 1038 nfsd->nd_stable = NFSV3WRITE_FILESYNC; 1039 cur_usec = (u_quad_t)time.tv_sec * 1000000 + (u_quad_t)time.tv_usec; 1040 nfsd->nd_time = cur_usec + nfsrvw_procrastinate; 1041 1042 /* 1043 * Now, get the write header.. 1044 */ 1045 nfsm_srvmtofh(&nfsd->nd_fh); 1046 if (v3) { 1047 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 1048 nfsd->nd_off = fxdr_hyper(tl); 1049 tl += 3; 1050 nfsd->nd_stable = fxdr_unsigned(int, *tl++); 1051 } else { 1052 nfsm_dissect(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1053 nfsd->nd_off = (off_t)fxdr_unsigned(u_int32_t, *++tl); 1054 tl += 2; 1055 } 1056 len = fxdr_unsigned(int32_t, *tl); 1057 nfsd->nd_len = len; 1058 nfsd->nd_eoff = nfsd->nd_off + len; 1059 1060 /* 1061 * Trim the header out of the mbuf list and trim off any trailing 1062 * junk so that the mbuf list has only the write data. 1063 */ 1064 zeroing = 1; 1065 i = 0; 1066 mp = mrep; 1067 while (mp) { 1068 if (mp == md) { 1069 zeroing = 0; 1070 adjust = dpos - mtod(mp, caddr_t); 1071 mp->m_len -= adjust; 1072 if (mp->m_len > 0 && adjust > 0) 1073 NFSMADV(mp, adjust); 1074 } 1075 if (zeroing) 1076 mp->m_len = 0; 1077 else { 1078 i += mp->m_len; 1079 if (i > len) { 1080 mp->m_len -= (i - len); 1081 zeroing = 1; 1082 } 1083 } 1084 mp = mp->m_next; 1085 } 1086 if (len > NFS_MAXDATA || len < 0 || i < len) { 1087 nfsmout: 1088 m_freem(mrep); 1089 error = EIO; 1090 nfsm_writereply(2 * NFSX_UNSIGNED, v3); 1091 if (v3) 1092 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1093 nfsd->nd_mreq = mreq; 1094 nfsd->nd_mrep = NULL; 1095 nfsd->nd_time = 0; 1096 } 1097 1098 /* 1099 * Add this entry to the hash and time queues. 1100 */ 1101 s = splsoftclock(); 1102 owp = NULL; 1103 wp = LIST_FIRST(&slp->ns_tq); 1104 while (wp && wp->nd_time < nfsd->nd_time) { 1105 owp = wp; 1106 wp = LIST_NEXT(wp, nd_tq); 1107 } 1108 if (owp) { 1109 LIST_INSERT_AFTER(owp, nfsd, nd_tq); 1110 } else { 1111 LIST_INSERT_HEAD(&slp->ns_tq, nfsd, nd_tq); 1112 } 1113 if (nfsd->nd_mrep) { 1114 wpp = NWDELAYHASH(slp, nfsd->nd_fh.fh_fid.fid_data); 1115 owp = NULL; 1116 wp = LIST_FIRST(wpp); 1117 while (wp && 1118 memcmp((caddr_t)&nfsd->nd_fh, (caddr_t)&wp->nd_fh, NFSX_V3FH)) { 1119 owp = wp; 1120 wp = LIST_NEXT(wp, nd_hash); 1121 } 1122 while (wp && wp->nd_off < nfsd->nd_off && 1123 !memcmp((caddr_t)&nfsd->nd_fh, (caddr_t)&wp->nd_fh, NFSX_V3FH)) { 1124 owp = wp; 1125 wp = LIST_NEXT(wp, nd_hash); 1126 } 1127 if (owp) { 1128 LIST_INSERT_AFTER(owp, nfsd, nd_hash); 1129 1130 /* 1131 * Search the hash list for overlapping entries and 1132 * coalesce. 1133 */ 1134 for(; nfsd && NFSW_CONTIG(owp, nfsd); nfsd = wp) { 1135 wp = LIST_NEXT(nfsd, nd_hash); 1136 if (NFSW_SAMECRED(owp, nfsd)) 1137 nfsrvw_coalesce(owp, nfsd); 1138 } 1139 } else { 1140 LIST_INSERT_HEAD(wpp, nfsd, nd_hash); 1141 } 1142 } 1143 splx(s); 1144 } 1145 1146 /* 1147 * Now, do VOP_WRITE()s for any one(s) that need to be done now 1148 * and generate the associated reply mbuf list(s). 1149 */ 1150 loop1: 1151 cur_usec = (u_quad_t)time.tv_sec * 1000000 + (u_quad_t)time.tv_usec; 1152 s = splsoftclock(); 1153 for (nfsd = LIST_FIRST(&slp->ns_tq); nfsd; nfsd = owp) { 1154 owp = LIST_NEXT(nfsd, nd_tq); 1155 if (nfsd->nd_time > cur_usec) 1156 break; 1157 if (nfsd->nd_mreq) 1158 continue; 1159 LIST_REMOVE(nfsd, nd_tq); 1160 LIST_REMOVE(nfsd, nd_hash); 1161 splx(s); 1162 mrep = nfsd->nd_mrep; 1163 nfsd->nd_mrep = NULL; 1164 cred = &nfsd->nd_cr; 1165 v3 = (nfsd->nd_flag & ND_NFSV3); 1166 forat_ret = aftat_ret = 1; 1167 error = nfsrv_fhtovp(&nfsd->nd_fh, 1, &vp, cred, slp, 1168 nfsd->nd_nam, &rdonly, (nfsd->nd_flag & ND_KERBAUTH), 1169 FALSE); 1170 if (!error) { 1171 if (v3) 1172 forat_ret = VOP_GETATTR(vp, &forat, cred, procp); 1173 if (vp->v_type != VREG) { 1174 if (v3) 1175 error = EINVAL; 1176 else 1177 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 1178 } 1179 } else 1180 vp = NULL; 1181 if (!error) { 1182 nqsrv_getl(vp, ND_WRITE); 1183 error = nfsrv_access(vp, VWRITE, cred, rdonly, procp, 1); 1184 } 1185 1186 if (nfsd->nd_stable == NFSV3WRITE_UNSTABLE) 1187 ioflags = IO_NODELOCKED; 1188 else if (nfsd->nd_stable == NFSV3WRITE_DATASYNC) 1189 ioflags = (IO_SYNC | IO_NODELOCKED); 1190 else 1191 ioflags = (IO_METASYNC | IO_SYNC | IO_NODELOCKED); 1192 uiop->uio_rw = UIO_WRITE; 1193 uiop->uio_segflg = UIO_SYSSPACE; 1194 uiop->uio_procp = NULL; 1195 uiop->uio_offset = nfsd->nd_off; 1196 uiop->uio_resid = nfsd->nd_eoff - nfsd->nd_off; 1197 if (uiop->uio_resid > 0) { 1198 mp = mrep; 1199 i = 0; 1200 while (mp) { 1201 if (mp->m_len > 0) 1202 i++; 1203 mp = mp->m_next; 1204 } 1205 uiop->uio_iovcnt = i; 1206 iov = malloc(i * sizeof (struct iovec), M_TEMP, M_WAITOK); 1207 uiop->uio_iov = ivp = iov; 1208 mp = mrep; 1209 while (mp) { 1210 if (mp->m_len > 0) { 1211 ivp->iov_base = mtod(mp, caddr_t); 1212 ivp->iov_len = mp->m_len; 1213 ivp++; 1214 } 1215 mp = mp->m_next; 1216 } 1217 if (!error) { 1218 if (vn_start_write(vp, &mntp, V_NOWAIT) != 0) { 1219 VOP_UNLOCK(vp, 0); 1220 vn_start_write(NULL, &mntp, V_WAIT); 1221 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 1222 } 1223 if (!error) { 1224 error = VOP_WRITE(vp, uiop, ioflags, cred); 1225 nfsstats.srvvop_writes++; 1226 vn_finished_write(mntp, 0); 1227 } 1228 } 1229 free((caddr_t)iov, M_TEMP); 1230 } 1231 m_freem(mrep); 1232 if (vp) { 1233 aftat_ret = VOP_GETATTR(vp, &va, cred, procp); 1234 vput(vp); 1235 } 1236 1237 /* 1238 * Loop around generating replies for all write rpcs that have 1239 * now been completed. 1240 */ 1241 swp = nfsd; 1242 do { 1243 if (error) { 1244 nfsm_writereply(NFSX_WCCDATA(v3), v3); 1245 if (v3) { 1246 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1247 } 1248 } else { 1249 nfsm_writereply(NFSX_PREOPATTR(v3) + 1250 NFSX_POSTOPORFATTR(v3) + 2 * NFSX_UNSIGNED + 1251 NFSX_WRITEVERF(v3), v3); 1252 if (v3) { 1253 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1254 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1255 *tl++ = txdr_unsigned(nfsd->nd_len); 1256 *tl++ = txdr_unsigned(swp->nd_stable); 1257 /* 1258 * Actually, there is no need to txdr these fields, 1259 * but it may make the values more human readable, 1260 * for debugging purposes. 1261 */ 1262 *tl++ = txdr_unsigned(boottime.tv_sec); 1263 *tl = txdr_unsigned(boottime.tv_usec); 1264 } else { 1265 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 1266 nfsm_srvfillattr(&va, fp); 1267 } 1268 } 1269 nfsd->nd_mreq = mreq; 1270 if (nfsd->nd_mrep) 1271 panic("nfsrv_write: nd_mrep not free"); 1272 1273 /* 1274 * Done. Put it at the head of the timer queue so that 1275 * the final phase can return the reply. 1276 */ 1277 s = splsoftclock(); 1278 if (nfsd != swp) { 1279 nfsd->nd_time = 0; 1280 LIST_INSERT_HEAD(&slp->ns_tq, nfsd, nd_tq); 1281 } 1282 nfsd = LIST_FIRST(&swp->nd_coalesce); 1283 if (nfsd) { 1284 LIST_REMOVE(nfsd, nd_tq); 1285 } 1286 splx(s); 1287 } while (nfsd); 1288 s = splsoftclock(); 1289 swp->nd_time = 0; 1290 LIST_INSERT_HEAD(&slp->ns_tq, swp, nd_tq); 1291 splx(s); 1292 goto loop1; 1293 } 1294 splx(s); 1295 1296 /* 1297 * Search for a reply to return. 1298 */ 1299 s = splsoftclock(); 1300 LIST_FOREACH(nfsd, &slp->ns_tq, nd_tq) { 1301 if (nfsd->nd_mreq) { 1302 LIST_REMOVE(nfsd, nd_tq); 1303 *mrq = nfsd->nd_mreq; 1304 *ndp = nfsd; 1305 break; 1306 } 1307 } 1308 splx(s); 1309 return (0); 1310 } 1311 1312 /* 1313 * Coalesce the write request nfsd into owp. To do this we must: 1314 * - remove nfsd from the queues 1315 * - merge nfsd->nd_mrep into owp->nd_mrep 1316 * - update the nd_eoff and nd_stable for owp 1317 * - put nfsd on owp's nd_coalesce list 1318 * NB: Must be called at splsoftclock(). 1319 */ 1320 void 1321 nfsrvw_coalesce(owp, nfsd) 1322 struct nfsrv_descript *owp; 1323 struct nfsrv_descript *nfsd; 1324 { 1325 int overlap; 1326 struct mbuf *mp; 1327 struct nfsrv_descript *m; 1328 1329 LIST_REMOVE(nfsd, nd_hash); 1330 LIST_REMOVE(nfsd, nd_tq); 1331 if (owp->nd_eoff < nfsd->nd_eoff) { 1332 overlap = owp->nd_eoff - nfsd->nd_off; 1333 if (overlap < 0) 1334 panic("nfsrv_coalesce: bad off"); 1335 if (overlap > 0) 1336 m_adj(nfsd->nd_mrep, overlap); 1337 mp = owp->nd_mrep; 1338 while (mp->m_next) 1339 mp = mp->m_next; 1340 mp->m_next = nfsd->nd_mrep; 1341 owp->nd_eoff = nfsd->nd_eoff; 1342 } else 1343 m_freem(nfsd->nd_mrep); 1344 nfsd->nd_mrep = NULL; 1345 if (nfsd->nd_stable == NFSV3WRITE_FILESYNC) 1346 owp->nd_stable = NFSV3WRITE_FILESYNC; 1347 else if (nfsd->nd_stable == NFSV3WRITE_DATASYNC && 1348 owp->nd_stable == NFSV3WRITE_UNSTABLE) 1349 owp->nd_stable = NFSV3WRITE_DATASYNC; 1350 LIST_INSERT_HEAD(&owp->nd_coalesce, nfsd, nd_tq); 1351 /* 1352 * nfsd might hold coalesce elements! Move them to owp. 1353 * Otherwise, requests may be lost and clients will be stuck. 1354 */ 1355 while ((m = LIST_FIRST(&nfsd->nd_coalesce)) != NULL) { 1356 LIST_REMOVE(m, nd_tq); 1357 LIST_INSERT_HEAD(&owp->nd_coalesce, m, nd_tq); 1358 } 1359 } 1360 1361 /* 1362 * nfs create service 1363 * now does a truncate to 0 length via. setattr if it already exists 1364 */ 1365 int 1366 nfsrv_create(nfsd, slp, procp, mrq) 1367 struct nfsrv_descript *nfsd; 1368 struct nfssvc_sock *slp; 1369 struct proc *procp; 1370 struct mbuf **mrq; 1371 { 1372 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1373 struct mbuf *nam = nfsd->nd_nam; 1374 caddr_t dpos = nfsd->nd_dpos; 1375 struct ucred *cred = &nfsd->nd_cr; 1376 struct nfs_fattr *fp; 1377 struct vattr va, dirfor, diraft; 1378 struct nfsv2_sattr *sp; 1379 u_int32_t *tl; 1380 struct nameidata nd; 1381 caddr_t cp; 1382 int32_t t1; 1383 caddr_t bpos; 1384 int error = 0, cache, len, tsize, dirfor_ret = 1, diraft_ret = 1; 1385 int rdev = 0; 1386 int v3 = (nfsd->nd_flag & ND_NFSV3), how, exclusive_flag = 0; 1387 char *cp2; 1388 struct mbuf *mb, *mreq; 1389 struct vnode *vp = NULL, *dirp = NULL; 1390 nfsfh_t nfh; 1391 fhandle_t *fhp; 1392 u_quad_t frev, tempsize; 1393 u_char cverf[NFSX_V3CREATEVERF]; 1394 struct mount *mp = NULL; 1395 1396 nd.ni_cnd.cn_nameiop = 0; 1397 fhp = &nfh.fh_generic; 1398 nfsm_srvmtofh(fhp); 1399 if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) 1400 return (ESTALE); 1401 vn_start_write(NULL, &mp, V_WAIT); 1402 nfsm_srvnamesiz(len); 1403 nd.ni_cnd.cn_cred = cred; 1404 nd.ni_cnd.cn_nameiop = CREATE; 1405 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 1406 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 1407 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1408 if (dirp) { 1409 if (v3) 1410 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 1411 procp); 1412 else { 1413 vrele(dirp); 1414 dirp = (struct vnode *)0; 1415 } 1416 } 1417 if (error) { 1418 nfsm_reply(NFSX_WCCDATA(v3)); 1419 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1420 if (dirp) 1421 vrele(dirp); 1422 vn_finished_write(mp, 0); 1423 return (0); 1424 } 1425 VATTR_NULL(&va); 1426 if (v3) { 1427 va.va_mode = 0; 1428 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1429 how = fxdr_unsigned(int, *tl); 1430 switch (how) { 1431 case NFSV3CREATE_GUARDED: 1432 if (nd.ni_vp) { 1433 error = EEXIST; 1434 break; 1435 } 1436 case NFSV3CREATE_UNCHECKED: 1437 nfsm_srvsattr(&va); 1438 break; 1439 case NFSV3CREATE_EXCLUSIVE: 1440 nfsm_dissect(cp, caddr_t, NFSX_V3CREATEVERF); 1441 memcpy(cverf, cp, NFSX_V3CREATEVERF); 1442 exclusive_flag = 1; 1443 break; 1444 }; 1445 va.va_type = VREG; 1446 } else { 1447 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1448 va.va_type = IFTOVT(fxdr_unsigned(u_int32_t, sp->sa_mode)); 1449 if (va.va_type == VNON) 1450 va.va_type = VREG; 1451 va.va_mode = nfstov_mode(sp->sa_mode); 1452 switch (va.va_type) { 1453 case VREG: 1454 tsize = fxdr_unsigned(int32_t, sp->sa_size); 1455 if (tsize != -1) 1456 va.va_size = (u_quad_t)tsize; 1457 break; 1458 case VCHR: 1459 case VBLK: 1460 case VFIFO: 1461 rdev = fxdr_unsigned(int32_t, sp->sa_size); 1462 break; 1463 default: 1464 break; 1465 }; 1466 } 1467 1468 /* 1469 * Iff doesn't exist, create it 1470 * otherwise just truncate to 0 length 1471 * should I set the mode too ?? 1472 */ 1473 if (nd.ni_vp == NULL) { 1474 if (va.va_type == VREG || va.va_type == VSOCK) { 1475 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1476 error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1477 if (!error) { 1478 if (exclusive_flag) { 1479 exclusive_flag = 0; 1480 VATTR_NULL(&va); 1481 /* 1482 * XXX 1483 * assuming NFSX_V3CREATEVERF 1484 * == sizeof(nfstime3) 1485 */ 1486 fxdr_nfsv3time(cverf, &va.va_atime); 1487 error = VOP_SETATTR(nd.ni_vp, &va, cred, 1488 procp); 1489 } 1490 } 1491 } else if (va.va_type == VCHR || va.va_type == VBLK || 1492 va.va_type == VFIFO) { 1493 if (va.va_type == VCHR && rdev == 0xffffffff) 1494 va.va_type = VFIFO; 1495 if (va.va_type != VFIFO && 1496 (error = suser(cred, (u_short *)0))) { 1497 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1498 vput(nd.ni_dvp); 1499 nfsm_reply(0); 1500 vn_finished_write(mp, 0); 1501 return (error); 1502 } else 1503 va.va_rdev = (dev_t)rdev; 1504 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1505 error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, 1506 &va); 1507 if (error) { 1508 nfsm_reply(0); 1509 } 1510 if (nd.ni_cnd.cn_flags & ISSYMLINK) { 1511 vrele(nd.ni_dvp); 1512 vput(nd.ni_vp); 1513 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1514 error = EINVAL; 1515 nfsm_reply(0); 1516 } 1517 } else { 1518 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1519 vput(nd.ni_dvp); 1520 error = ENXIO; 1521 } 1522 vp = nd.ni_vp; 1523 } else { 1524 vp = nd.ni_vp; 1525 if (nd.ni_dvp == vp) 1526 vrele(nd.ni_dvp); 1527 else 1528 vput(nd.ni_dvp); 1529 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1530 if (!error && va.va_size != -1) { 1531 error = nfsrv_access(vp, VWRITE, cred, 1532 (nd.ni_cnd.cn_flags & RDONLY), procp, 0); 1533 if (!error) { 1534 nqsrv_getl(vp, ND_WRITE); 1535 tempsize = va.va_size; 1536 VATTR_NULL(&va); 1537 va.va_size = tempsize; 1538 error = VOP_SETATTR(vp, &va, cred, 1539 procp); 1540 } 1541 } 1542 if (error) 1543 vput(vp); 1544 } 1545 if (!error) { 1546 memset((caddr_t)fhp, 0, sizeof(nfh)); 1547 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsidx; 1548 error = VFS_VPTOFH(vp, &fhp->fh_fid); 1549 if (!error) 1550 error = VOP_GETATTR(vp, &va, cred, procp); 1551 vput(vp); 1552 } 1553 if (v3) { 1554 if (exclusive_flag && !error) { 1555 /* 1556 * XXX assuming NFSX_V3CREATEVERF == sizeof(nfstime3) 1557 */ 1558 char oldverf[NFSX_V3CREATEVERF]; 1559 1560 txdr_nfsv3time(&va.va_atime, oldverf); 1561 if (memcmp(cverf, oldverf, NFSX_V3CREATEVERF)) 1562 error = EEXIST; 1563 } 1564 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 1565 vrele(dirp); 1566 } 1567 nfsm_reply(NFSX_SRVFH(v3) + NFSX_FATTR(v3) + NFSX_WCCDATA(v3)); 1568 if (v3) { 1569 if (!error) { 1570 nfsm_srvpostop_fh(fhp); 1571 nfsm_srvpostop_attr(0, &va); 1572 } 1573 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1574 } else { 1575 nfsm_srvfhtom(fhp, v3); 1576 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 1577 nfsm_srvfillattr(&va, fp); 1578 } 1579 vn_finished_write(mp, 0); 1580 return (0); 1581 nfsmout: 1582 if (dirp) 1583 vrele(dirp); 1584 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1585 if (nd.ni_dvp == nd.ni_vp) 1586 vrele(nd.ni_dvp); 1587 else 1588 vput(nd.ni_dvp); 1589 if (nd.ni_vp) 1590 vput(nd.ni_vp); 1591 vn_finished_write(mp, 0); 1592 return (error); 1593 } 1594 1595 /* 1596 * nfs v3 mknod service 1597 */ 1598 int 1599 nfsrv_mknod(nfsd, slp, procp, mrq) 1600 struct nfsrv_descript *nfsd; 1601 struct nfssvc_sock *slp; 1602 struct proc *procp; 1603 struct mbuf **mrq; 1604 { 1605 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1606 struct mbuf *nam = nfsd->nd_nam; 1607 caddr_t dpos = nfsd->nd_dpos; 1608 struct ucred *cred = &nfsd->nd_cr; 1609 struct vattr va, dirfor, diraft; 1610 u_int32_t *tl; 1611 struct nameidata nd; 1612 int32_t t1; 1613 caddr_t bpos; 1614 int error = 0, cache, len, dirfor_ret = 1, diraft_ret = 1; 1615 u_int32_t major, minor; 1616 enum vtype vtyp; 1617 char *cp2; 1618 struct mbuf *mb, *mreq; 1619 struct vnode *vp, *dirp = (struct vnode *)0; 1620 nfsfh_t nfh; 1621 fhandle_t *fhp; 1622 u_quad_t frev; 1623 struct mount *mp = NULL; 1624 1625 nd.ni_cnd.cn_nameiop = 0; 1626 fhp = &nfh.fh_generic; 1627 nfsm_srvmtofh(fhp); 1628 if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) 1629 return (ESTALE); 1630 vn_start_write(NULL, &mp, V_WAIT); 1631 nfsm_srvnamesiz(len); 1632 nd.ni_cnd.cn_cred = cred; 1633 nd.ni_cnd.cn_nameiop = CREATE; 1634 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 1635 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 1636 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1637 if (dirp) 1638 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, procp); 1639 if (error) { 1640 nfsm_reply(NFSX_WCCDATA(1)); 1641 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1642 if (dirp) 1643 vrele(dirp); 1644 vn_finished_write(mp, 0); 1645 return (0); 1646 } 1647 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1648 vtyp = nfsv3tov_type(*tl); 1649 if (vtyp != VCHR && vtyp != VBLK && vtyp != VSOCK && vtyp != VFIFO) { 1650 error = NFSERR_BADTYPE; 1651 goto abort; 1652 } 1653 VATTR_NULL(&va); 1654 va.va_mode = 0; 1655 nfsm_srvsattr(&va); 1656 if (vtyp == VCHR || vtyp == VBLK) { 1657 dev_t rdev; 1658 1659 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1660 major = fxdr_unsigned(u_int32_t, *tl++); 1661 minor = fxdr_unsigned(u_int32_t, *tl); 1662 rdev = makedev(major, minor); 1663 if (major(rdev) != major || minor(rdev) != minor) { 1664 error = EINVAL; 1665 goto abort; 1666 } 1667 va.va_rdev = rdev; 1668 } 1669 1670 /* 1671 * Iff doesn't exist, create it. 1672 */ 1673 if (nd.ni_vp) { 1674 error = EEXIST; 1675 abort: 1676 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1677 if (nd.ni_dvp == nd.ni_vp) 1678 vrele(nd.ni_dvp); 1679 else 1680 vput(nd.ni_dvp); 1681 if (nd.ni_vp) 1682 vput(nd.ni_vp); 1683 goto out; 1684 } 1685 va.va_type = vtyp; 1686 if (vtyp == VSOCK) { 1687 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1688 error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1689 } else { 1690 if (va.va_type != VFIFO && 1691 (error = suser(cred, (u_short *)0))) { 1692 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1693 vput(nd.ni_dvp); 1694 goto out; 1695 } 1696 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1697 error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1698 if (error) { 1699 goto out; 1700 } 1701 if (error) 1702 goto out; 1703 if (nd.ni_cnd.cn_flags & ISSYMLINK) { 1704 vput(nd.ni_vp); 1705 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1706 error = EINVAL; 1707 } 1708 } 1709 out: 1710 vp = nd.ni_vp; 1711 if (!error) { 1712 memset((caddr_t)fhp, 0, sizeof(nfh)); 1713 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsidx; 1714 error = VFS_VPTOFH(vp, &fhp->fh_fid); 1715 if (!error) 1716 error = VOP_GETATTR(vp, &va, cred, procp); 1717 vput(vp); 1718 } 1719 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 1720 vrele(dirp); 1721 nfsm_reply(NFSX_SRVFH(1) + NFSX_POSTOPATTR(1) + NFSX_WCCDATA(1)); 1722 if (!error) { 1723 nfsm_srvpostop_fh(fhp); 1724 nfsm_srvpostop_attr(0, &va); 1725 } 1726 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1727 vn_finished_write(mp, 0); 1728 return (0); 1729 nfsmout: 1730 if (dirp) 1731 vrele(dirp); 1732 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1733 if (nd.ni_dvp == nd.ni_vp) 1734 vrele(nd.ni_dvp); 1735 else 1736 vput(nd.ni_dvp); 1737 if (nd.ni_vp) 1738 vput(nd.ni_vp); 1739 vn_finished_write(mp, 0); 1740 return (error); 1741 } 1742 1743 /* 1744 * nfs remove service 1745 */ 1746 int 1747 nfsrv_remove(nfsd, slp, procp, mrq) 1748 struct nfsrv_descript *nfsd; 1749 struct nfssvc_sock *slp; 1750 struct proc *procp; 1751 struct mbuf **mrq; 1752 { 1753 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1754 struct mbuf *nam = nfsd->nd_nam; 1755 caddr_t dpos = nfsd->nd_dpos; 1756 struct ucred *cred = &nfsd->nd_cr; 1757 struct nameidata nd; 1758 u_int32_t *tl; 1759 int32_t t1; 1760 caddr_t bpos; 1761 int error = 0, cache, len, dirfor_ret = 1, diraft_ret = 1; 1762 int v3 = (nfsd->nd_flag & ND_NFSV3); 1763 char *cp2; 1764 struct mbuf *mb, *mreq; 1765 struct vnode *vp, *dirp; 1766 struct vattr dirfor, diraft; 1767 nfsfh_t nfh; 1768 fhandle_t *fhp; 1769 u_quad_t frev; 1770 struct mount *mp = NULL; 1771 1772 #ifndef nolint 1773 vp = (struct vnode *)0; 1774 #endif 1775 fhp = &nfh.fh_generic; 1776 nfsm_srvmtofh(fhp); 1777 if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) 1778 return (ESTALE); 1779 vn_start_write(NULL, &mp, V_WAIT); 1780 nfsm_srvnamesiz(len); 1781 nd.ni_cnd.cn_cred = cred; 1782 nd.ni_cnd.cn_nameiop = DELETE; 1783 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 1784 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 1785 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1786 if (dirp) { 1787 if (v3) 1788 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 1789 procp); 1790 else 1791 vrele(dirp); 1792 } 1793 if (!error) { 1794 vp = nd.ni_vp; 1795 if (vp->v_type == VDIR && 1796 (error = suser(cred, (u_short *)0)) != 0) 1797 goto out; 1798 /* 1799 * The root of a mounted filesystem cannot be deleted. 1800 */ 1801 if (vp->v_flag & VROOT) { 1802 error = EBUSY; 1803 goto out; 1804 } 1805 out: 1806 if (!error) { 1807 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1808 nqsrv_getl(vp, ND_WRITE); 1809 error = VOP_REMOVE(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); 1810 } else { 1811 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1812 if (nd.ni_dvp == vp) 1813 vrele(nd.ni_dvp); 1814 else 1815 vput(nd.ni_dvp); 1816 vput(vp); 1817 } 1818 } 1819 if (dirp && v3) { 1820 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 1821 vrele(dirp); 1822 } 1823 nfsm_reply(NFSX_WCCDATA(v3)); 1824 if (v3) { 1825 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1826 vn_finished_write(mp, 0); 1827 return (0); 1828 } 1829 vn_finished_write(mp, 0); 1830 nfsm_srvdone; 1831 } 1832 1833 /* 1834 * nfs rename service 1835 */ 1836 int 1837 nfsrv_rename(nfsd, slp, procp, mrq) 1838 struct nfsrv_descript *nfsd; 1839 struct nfssvc_sock *slp; 1840 struct proc *procp; 1841 struct mbuf **mrq; 1842 { 1843 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1844 struct mbuf *nam = nfsd->nd_nam; 1845 caddr_t dpos = nfsd->nd_dpos; 1846 struct ucred *cred = &nfsd->nd_cr; 1847 u_int32_t *tl; 1848 int32_t t1; 1849 caddr_t bpos; 1850 int error = 0, cache, fdirfor_ret = 1, fdiraft_ret = 1; 1851 uint32_t len, len2; 1852 int tdirfor_ret = 1, tdiraft_ret = 1; 1853 int v3 = (nfsd->nd_flag & ND_NFSV3); 1854 char *cp2; 1855 struct mbuf *mb, *mreq; 1856 struct nameidata fromnd, tond; 1857 struct vnode *fvp, *tvp, *tdvp, *fdirp = (struct vnode *)0; 1858 struct vnode *tdirp = (struct vnode *)0; 1859 struct vattr fdirfor, fdiraft, tdirfor, tdiraft; 1860 nfsfh_t fnfh, tnfh; 1861 fhandle_t *ffhp, *tfhp; 1862 u_quad_t frev; 1863 uid_t saved_uid; 1864 struct mount *mp = NULL; 1865 1866 #ifndef nolint 1867 fvp = (struct vnode *)0; 1868 #endif 1869 ffhp = &fnfh.fh_generic; 1870 tfhp = &tnfh.fh_generic; 1871 fromnd.ni_cnd.cn_nameiop = 0; 1872 tond.ni_cnd.cn_nameiop = 0; 1873 nfsm_srvmtofh(ffhp); 1874 if ((mp = vfs_getvfs(&ffhp->fh_fsid)) == NULL) 1875 return (ESTALE); 1876 vn_start_write(NULL, &mp, V_WAIT); 1877 nfsm_srvnamesiz(len); 1878 /* 1879 * Remember our original uid so that we can reset cr_uid before 1880 * the second nfs_namei() call, in case it is remapped. 1881 */ 1882 saved_uid = cred->cr_uid; 1883 fromnd.ni_cnd.cn_cred = cred; 1884 fromnd.ni_cnd.cn_nameiop = DELETE; 1885 fromnd.ni_cnd.cn_flags = WANTPARENT | SAVESTART; 1886 error = nfs_namei(&fromnd, ffhp, len, slp, nam, &md, 1887 &dpos, &fdirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1888 if (fdirp) { 1889 if (v3) 1890 fdirfor_ret = VOP_GETATTR(fdirp, &fdirfor, cred, 1891 procp); 1892 else { 1893 vrele(fdirp); 1894 fdirp = (struct vnode *)0; 1895 } 1896 } 1897 if (error) { 1898 nfsm_reply(2 * NFSX_WCCDATA(v3)); 1899 nfsm_srvwcc_data(fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft); 1900 nfsm_srvwcc_data(tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft); 1901 if (fdirp) 1902 vrele(fdirp); 1903 vn_finished_write(mp, 0); 1904 return (0); 1905 } 1906 fvp = fromnd.ni_vp; 1907 nfsm_srvmtofh(tfhp); 1908 if (v3) { 1909 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 1910 len2 = fxdr_unsigned(uint32_t, *tl); 1911 /* len2 will be checked by nfs_namei */ 1912 } 1913 else { 1914 /* NFSv2 */ 1915 nfsm_strsiz(len2, NFS_MAXNAMLEN); 1916 } 1917 cred->cr_uid = saved_uid; 1918 tond.ni_cnd.cn_cred = cred; 1919 tond.ni_cnd.cn_nameiop = RENAME; 1920 tond.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF | NOCACHE | SAVESTART; 1921 error = nfs_namei(&tond, tfhp, len2, slp, nam, &md, 1922 &dpos, &tdirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1923 if (tdirp) { 1924 if (v3) 1925 tdirfor_ret = VOP_GETATTR(tdirp, &tdirfor, cred, 1926 procp); 1927 else { 1928 vrele(tdirp); 1929 tdirp = (struct vnode *)0; 1930 } 1931 } 1932 if (error) { 1933 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 1934 vrele(fromnd.ni_dvp); 1935 vrele(fvp); 1936 goto out1; 1937 } 1938 tdvp = tond.ni_dvp; 1939 tvp = tond.ni_vp; 1940 if (tvp != NULL) { 1941 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 1942 if (v3) 1943 error = EEXIST; 1944 else 1945 error = EISDIR; 1946 goto out; 1947 } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 1948 if (v3) 1949 error = EEXIST; 1950 else 1951 error = ENOTDIR; 1952 goto out; 1953 } 1954 if (tvp->v_type == VDIR && tvp->v_mountedhere) { 1955 if (v3) 1956 error = EXDEV; 1957 else 1958 error = ENOTEMPTY; 1959 goto out; 1960 } 1961 } 1962 if (fvp->v_type == VDIR && fvp->v_mountedhere) { 1963 if (v3) 1964 error = EXDEV; 1965 else 1966 error = ENOTEMPTY; 1967 goto out; 1968 } 1969 if (fvp->v_mount != tdvp->v_mount) { 1970 if (v3) 1971 error = EXDEV; 1972 else 1973 error = ENOTEMPTY; 1974 goto out; 1975 } 1976 if (fvp == tdvp) { 1977 if (v3) 1978 error = EINVAL; 1979 else 1980 error = ENOTEMPTY; 1981 } 1982 /* 1983 * If source is the same as the destination (that is the 1984 * same vnode with the same name in the same directory), 1985 * then there is nothing to do. 1986 */ 1987 if (fvp == tvp && fromnd.ni_dvp == tdvp && 1988 fromnd.ni_cnd.cn_namelen == tond.ni_cnd.cn_namelen && 1989 !memcmp(fromnd.ni_cnd.cn_nameptr, tond.ni_cnd.cn_nameptr, 1990 fromnd.ni_cnd.cn_namelen)) 1991 error = -1; 1992 out: 1993 if (!error) { 1994 nqsrv_getl(fromnd.ni_dvp, ND_WRITE); 1995 nqsrv_getl(tdvp, ND_WRITE); 1996 if (tvp) { 1997 nqsrv_getl(tvp, ND_WRITE); 1998 } 1999 error = VOP_RENAME(fromnd.ni_dvp, fromnd.ni_vp, &fromnd.ni_cnd, 2000 tond.ni_dvp, tond.ni_vp, &tond.ni_cnd); 2001 } else { 2002 VOP_ABORTOP(tond.ni_dvp, &tond.ni_cnd); 2003 if (tdvp == tvp) 2004 vrele(tdvp); 2005 else 2006 vput(tdvp); 2007 if (tvp) 2008 vput(tvp); 2009 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 2010 vrele(fromnd.ni_dvp); 2011 vrele(fvp); 2012 if (error == -1) 2013 error = 0; 2014 } 2015 vrele(tond.ni_startdir); 2016 PNBUF_PUT(tond.ni_cnd.cn_pnbuf); 2017 out1: 2018 if (fdirp) { 2019 fdiraft_ret = VOP_GETATTR(fdirp, &fdiraft, cred, procp); 2020 vrele(fdirp); 2021 } 2022 if (tdirp) { 2023 tdiraft_ret = VOP_GETATTR(tdirp, &tdiraft, cred, procp); 2024 vrele(tdirp); 2025 } 2026 vrele(fromnd.ni_startdir); 2027 PNBUF_PUT(fromnd.ni_cnd.cn_pnbuf); 2028 nfsm_reply(2 * NFSX_WCCDATA(v3)); 2029 if (v3) { 2030 nfsm_srvwcc_data(fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft); 2031 nfsm_srvwcc_data(tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft); 2032 } 2033 vn_finished_write(mp, 0); 2034 return (0); 2035 2036 nfsmout: 2037 if (fdirp) 2038 vrele(fdirp); 2039 if (tdirp) 2040 vrele(tdirp); 2041 if (tond.ni_cnd.cn_nameiop) { 2042 vrele(tond.ni_startdir); 2043 PNBUF_PUT(tond.ni_cnd.cn_pnbuf); 2044 } 2045 if (fromnd.ni_cnd.cn_nameiop) { 2046 vrele(fromnd.ni_startdir); 2047 PNBUF_PUT(fromnd.ni_cnd.cn_pnbuf); 2048 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 2049 vrele(fromnd.ni_dvp); 2050 vrele(fvp); 2051 } 2052 return (error); 2053 } 2054 2055 /* 2056 * nfs link service 2057 */ 2058 int 2059 nfsrv_link(nfsd, slp, procp, mrq) 2060 struct nfsrv_descript *nfsd; 2061 struct nfssvc_sock *slp; 2062 struct proc *procp; 2063 struct mbuf **mrq; 2064 { 2065 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2066 struct mbuf *nam = nfsd->nd_nam; 2067 caddr_t dpos = nfsd->nd_dpos; 2068 struct ucred *cred = &nfsd->nd_cr; 2069 struct nameidata nd; 2070 u_int32_t *tl; 2071 int32_t t1; 2072 caddr_t bpos; 2073 int error = 0, rdonly, cache, len, dirfor_ret = 1, diraft_ret = 1; 2074 int getret = 1, v3 = (nfsd->nd_flag & ND_NFSV3); 2075 char *cp2; 2076 struct mbuf *mb, *mreq; 2077 struct vnode *vp, *xp, *dirp = (struct vnode *)0; 2078 struct vattr dirfor, diraft, at; 2079 nfsfh_t nfh, dnfh; 2080 fhandle_t *fhp, *dfhp; 2081 u_quad_t frev; 2082 struct mount *mp = NULL; 2083 2084 fhp = &nfh.fh_generic; 2085 dfhp = &dnfh.fh_generic; 2086 nfsm_srvmtofh(fhp); 2087 if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) 2088 return (ESTALE); 2089 vn_start_write(NULL, &mp, V_WAIT); 2090 nfsm_srvmtofh(dfhp); 2091 nfsm_srvnamesiz(len); 2092 error = nfsrv_fhtovp(fhp, FALSE, &vp, cred, slp, nam, 2093 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2094 if (error) { 2095 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2096 nfsm_srvpostop_attr(getret, &at); 2097 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2098 vn_finished_write(mp, 0); 2099 return (0); 2100 } 2101 if (vp->v_type == VDIR && (error = suser(cred, (u_short *)0)) != 0) 2102 goto out1; 2103 nd.ni_cnd.cn_cred = cred; 2104 nd.ni_cnd.cn_nameiop = CREATE; 2105 nd.ni_cnd.cn_flags = LOCKPARENT; 2106 error = nfs_namei(&nd, dfhp, len, slp, nam, &md, &dpos, 2107 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2108 if (dirp) { 2109 if (v3) 2110 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 2111 procp); 2112 else { 2113 vrele(dirp); 2114 dirp = (struct vnode *)0; 2115 } 2116 } 2117 if (error) 2118 goto out1; 2119 xp = nd.ni_vp; 2120 if (xp != NULL) { 2121 error = EEXIST; 2122 goto out; 2123 } 2124 xp = nd.ni_dvp; 2125 if (vp->v_mount != xp->v_mount) 2126 error = EXDEV; 2127 out: 2128 if (!error) { 2129 nqsrv_getl(vp, ND_WRITE); 2130 nqsrv_getl(xp, ND_WRITE); 2131 error = VOP_LINK(nd.ni_dvp, vp, &nd.ni_cnd); 2132 } else { 2133 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2134 if (nd.ni_dvp == nd.ni_vp) 2135 vrele(nd.ni_dvp); 2136 else 2137 vput(nd.ni_dvp); 2138 if (nd.ni_vp) 2139 vrele(nd.ni_vp); 2140 } 2141 out1: 2142 if (v3) 2143 getret = VOP_GETATTR(vp, &at, cred, procp); 2144 if (dirp) { 2145 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 2146 vrele(dirp); 2147 } 2148 vrele(vp); 2149 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2150 if (v3) { 2151 nfsm_srvpostop_attr(getret, &at); 2152 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2153 vn_finished_write(mp, 0); 2154 return (0); 2155 } 2156 vn_finished_write(mp, 0); 2157 nfsm_srvdone; 2158 } 2159 2160 /* 2161 * nfs symbolic link service 2162 */ 2163 int 2164 nfsrv_symlink(nfsd, slp, procp, mrq) 2165 struct nfsrv_descript *nfsd; 2166 struct nfssvc_sock *slp; 2167 struct proc *procp; 2168 struct mbuf **mrq; 2169 { 2170 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2171 struct mbuf *nam = nfsd->nd_nam; 2172 caddr_t dpos = nfsd->nd_dpos; 2173 struct ucred *cred = &nfsd->nd_cr; 2174 struct vattr va, dirfor, diraft; 2175 struct nameidata nd; 2176 u_int32_t *tl; 2177 int32_t t1; 2178 struct nfsv2_sattr *sp; 2179 char *bpos, *pathcp = NULL, *cp2; 2180 struct uio io; 2181 struct iovec iv; 2182 int error = 0, cache, dirfor_ret = 1, diraft_ret = 1; 2183 uint32_t len, len2; 2184 int v3 = (nfsd->nd_flag & ND_NFSV3); 2185 struct mbuf *mb, *mreq; 2186 struct vnode *dirp = (struct vnode *)0; 2187 nfsfh_t nfh; 2188 fhandle_t *fhp; 2189 u_quad_t frev; 2190 struct mount *mp = NULL; 2191 2192 nd.ni_cnd.cn_nameiop = 0; 2193 fhp = &nfh.fh_generic; 2194 nfsm_srvmtofh(fhp); 2195 if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) 2196 return (ESTALE); 2197 vn_start_write(NULL, &mp, V_WAIT); 2198 nfsm_srvnamesiz(len); 2199 nd.ni_cnd.cn_cred = cred; 2200 nd.ni_cnd.cn_nameiop = CREATE; 2201 nd.ni_cnd.cn_flags = LOCKPARENT; 2202 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 2203 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2204 if (dirp) { 2205 if (v3) 2206 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 2207 procp); 2208 else { 2209 vrele(dirp); 2210 dirp = (struct vnode *)0; 2211 } 2212 } 2213 if (error) 2214 goto out; 2215 VATTR_NULL(&va); 2216 va.va_type = VLNK; 2217 if (v3) { 2218 va.va_mode = 0; 2219 nfsm_srvsattr(&va); 2220 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 2221 len2 = fxdr_unsigned(uint32_t, *tl); 2222 if (len2 > PATH_MAX) { 2223 /* XXX should check _PC_NO_TRUNC */ 2224 error = ENAMETOOLONG; 2225 goto abortop; 2226 } 2227 } 2228 else { 2229 /* NFSv2 */ 2230 nfsm_strsiz(len2, NFS_MAXPATHLEN); 2231 } 2232 pathcp = malloc(len2 + 1, M_TEMP, M_WAITOK); 2233 iv.iov_base = pathcp; 2234 iv.iov_len = len2; 2235 io.uio_resid = len2; 2236 io.uio_offset = 0; 2237 io.uio_iov = &iv; 2238 io.uio_iovcnt = 1; 2239 io.uio_segflg = UIO_SYSSPACE; 2240 io.uio_rw = UIO_READ; 2241 io.uio_procp = NULL; 2242 nfsm_mtouio(&io, len2); 2243 if (!v3) { 2244 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2245 va.va_mode = fxdr_unsigned(u_int16_t, sp->sa_mode); 2246 } 2247 *(pathcp + len2) = '\0'; 2248 if (nd.ni_vp) { 2249 error = EEXIST; 2250 abortop: 2251 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2252 if (nd.ni_dvp == nd.ni_vp) 2253 vrele(nd.ni_dvp); 2254 else 2255 vput(nd.ni_dvp); 2256 if (nd.ni_vp) 2257 vrele(nd.ni_vp); 2258 goto out; 2259 } 2260 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2261 error = VOP_SYMLINK(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va, pathcp); 2262 if (!error) { 2263 if (v3) { 2264 memset((caddr_t)fhp, 0, sizeof(nfh)); 2265 fhp->fh_fsid = nd.ni_vp->v_mount->mnt_stat.f_fsidx; 2266 error = VFS_VPTOFH(nd.ni_vp, &fhp->fh_fid); 2267 if (!error) 2268 error = VOP_GETATTR(nd.ni_vp, &va, cred, 2269 procp); 2270 vput(nd.ni_vp); 2271 } else { 2272 vput(nd.ni_vp); 2273 } 2274 } 2275 out: 2276 if (pathcp) 2277 free(pathcp, M_TEMP); 2278 if (dirp) { 2279 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 2280 vrele(dirp); 2281 } 2282 nfsm_reply(NFSX_SRVFH(v3) + NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2283 if (v3) { 2284 if (!error) { 2285 nfsm_srvpostop_fh(fhp); 2286 nfsm_srvpostop_attr(0, &va); 2287 } 2288 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2289 } 2290 vn_finished_write(mp, 0); 2291 return (0); 2292 nfsmout: 2293 if (dirp) 2294 vrele(dirp); 2295 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2296 if (nd.ni_dvp == nd.ni_vp) 2297 vrele(nd.ni_dvp); 2298 else 2299 vput(nd.ni_dvp); 2300 if (nd.ni_vp) 2301 vrele(nd.ni_vp); 2302 if (pathcp) 2303 free(pathcp, M_TEMP); 2304 vn_finished_write(mp, 0); 2305 return (error); 2306 } 2307 2308 /* 2309 * nfs mkdir service 2310 */ 2311 int 2312 nfsrv_mkdir(nfsd, slp, procp, mrq) 2313 struct nfsrv_descript *nfsd; 2314 struct nfssvc_sock *slp; 2315 struct proc *procp; 2316 struct mbuf **mrq; 2317 { 2318 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2319 struct mbuf *nam = nfsd->nd_nam; 2320 caddr_t dpos = nfsd->nd_dpos; 2321 struct ucred *cred = &nfsd->nd_cr; 2322 struct vattr va, dirfor, diraft; 2323 struct nfs_fattr *fp; 2324 struct nameidata nd; 2325 caddr_t cp; 2326 u_int32_t *tl; 2327 int32_t t1; 2328 caddr_t bpos; 2329 int error = 0, cache, len, dirfor_ret = 1, diraft_ret = 1; 2330 int v3 = (nfsd->nd_flag & ND_NFSV3); 2331 char *cp2; 2332 struct mbuf *mb, *mreq; 2333 struct vnode *vp, *dirp = (struct vnode *)0; 2334 nfsfh_t nfh; 2335 fhandle_t *fhp; 2336 u_quad_t frev; 2337 struct mount *mp = NULL; 2338 2339 fhp = &nfh.fh_generic; 2340 nfsm_srvmtofh(fhp); 2341 if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) 2342 return (ESTALE); 2343 vn_start_write(NULL, &mp, V_WAIT); 2344 nfsm_srvnamesiz(len); 2345 nd.ni_cnd.cn_cred = cred; 2346 nd.ni_cnd.cn_nameiop = CREATE; 2347 nd.ni_cnd.cn_flags = LOCKPARENT; 2348 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 2349 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2350 if (dirp) { 2351 if (v3) 2352 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 2353 procp); 2354 else { 2355 vrele(dirp); 2356 dirp = (struct vnode *)0; 2357 } 2358 } 2359 if (error) { 2360 nfsm_reply(NFSX_WCCDATA(v3)); 2361 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2362 if (dirp) 2363 vrele(dirp); 2364 vn_finished_write(mp, 0); 2365 return (0); 2366 } 2367 VATTR_NULL(&va); 2368 if (v3) { 2369 va.va_mode = 0; 2370 nfsm_srvsattr(&va); 2371 } else { 2372 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2373 va.va_mode = nfstov_mode(*tl++); 2374 } 2375 va.va_type = VDIR; 2376 vp = nd.ni_vp; 2377 if (vp != NULL) { 2378 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2379 if (nd.ni_dvp == vp) 2380 vrele(nd.ni_dvp); 2381 else 2382 vput(nd.ni_dvp); 2383 vrele(vp); 2384 error = EEXIST; 2385 goto out; 2386 } 2387 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2388 error = VOP_MKDIR(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 2389 if (!error) { 2390 vp = nd.ni_vp; 2391 memset((caddr_t)fhp, 0, sizeof(nfh)); 2392 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsidx; 2393 error = VFS_VPTOFH(vp, &fhp->fh_fid); 2394 if (!error) 2395 error = VOP_GETATTR(vp, &va, cred, procp); 2396 vput(vp); 2397 } 2398 out: 2399 if (dirp) { 2400 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 2401 vrele(dirp); 2402 } 2403 nfsm_reply(NFSX_SRVFH(v3) + NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2404 if (v3) { 2405 if (!error) { 2406 nfsm_srvpostop_fh(fhp); 2407 nfsm_srvpostop_attr(0, &va); 2408 } 2409 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2410 } else { 2411 nfsm_srvfhtom(fhp, v3); 2412 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 2413 nfsm_srvfillattr(&va, fp); 2414 } 2415 vn_finished_write(mp, 0); 2416 return (0); 2417 nfsmout: 2418 if (dirp) 2419 vrele(dirp); 2420 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2421 if (nd.ni_dvp == nd.ni_vp) 2422 vrele(nd.ni_dvp); 2423 else 2424 vput(nd.ni_dvp); 2425 if (nd.ni_vp) 2426 vrele(nd.ni_vp); 2427 vn_finished_write(mp, 0); 2428 return (error); 2429 } 2430 2431 /* 2432 * nfs rmdir service 2433 */ 2434 int 2435 nfsrv_rmdir(nfsd, slp, procp, mrq) 2436 struct nfsrv_descript *nfsd; 2437 struct nfssvc_sock *slp; 2438 struct proc *procp; 2439 struct mbuf **mrq; 2440 { 2441 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2442 struct mbuf *nam = nfsd->nd_nam; 2443 caddr_t dpos = nfsd->nd_dpos; 2444 struct ucred *cred = &nfsd->nd_cr; 2445 u_int32_t *tl; 2446 int32_t t1; 2447 caddr_t bpos; 2448 int error = 0, cache, len, dirfor_ret = 1, diraft_ret = 1; 2449 int v3 = (nfsd->nd_flag & ND_NFSV3); 2450 char *cp2; 2451 struct mbuf *mb, *mreq; 2452 struct vnode *vp, *dirp = (struct vnode *)0; 2453 struct vattr dirfor, diraft; 2454 nfsfh_t nfh; 2455 fhandle_t *fhp; 2456 struct nameidata nd; 2457 u_quad_t frev; 2458 struct mount *mp = NULL; 2459 2460 fhp = &nfh.fh_generic; 2461 nfsm_srvmtofh(fhp); 2462 if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) 2463 return (ESTALE); 2464 vn_start_write(NULL, &mp, V_WAIT); 2465 nfsm_srvnamesiz(len); 2466 nd.ni_cnd.cn_cred = cred; 2467 nd.ni_cnd.cn_nameiop = DELETE; 2468 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 2469 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 2470 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2471 if (dirp) { 2472 if (v3) 2473 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 2474 procp); 2475 else { 2476 vrele(dirp); 2477 dirp = (struct vnode *)0; 2478 } 2479 } 2480 if (error) { 2481 nfsm_reply(NFSX_WCCDATA(v3)); 2482 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2483 if (dirp) 2484 vrele(dirp); 2485 vn_finished_write(mp, 0); 2486 return (0); 2487 } 2488 vp = nd.ni_vp; 2489 if (vp->v_type != VDIR) { 2490 error = ENOTDIR; 2491 goto out; 2492 } 2493 /* 2494 * No rmdir "." please. 2495 */ 2496 if (nd.ni_dvp == vp) { 2497 error = EINVAL; 2498 goto out; 2499 } 2500 /* 2501 * The root of a mounted filesystem cannot be deleted. 2502 */ 2503 if (vp->v_flag & VROOT) 2504 error = EBUSY; 2505 out: 2506 if (!error) { 2507 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2508 nqsrv_getl(vp, ND_WRITE); 2509 error = VOP_RMDIR(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); 2510 } else { 2511 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2512 if (nd.ni_dvp == nd.ni_vp) 2513 vrele(nd.ni_dvp); 2514 else 2515 vput(nd.ni_dvp); 2516 vput(vp); 2517 } 2518 if (dirp) { 2519 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 2520 vrele(dirp); 2521 } 2522 nfsm_reply(NFSX_WCCDATA(v3)); 2523 if (v3) { 2524 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2525 vn_finished_write(mp, 0); 2526 return (0); 2527 } 2528 vn_finished_write(mp, 0); 2529 nfsm_srvdone; 2530 } 2531 2532 /* 2533 * nfs readdir service 2534 * - mallocs what it thinks is enough to read 2535 * count rounded up to a multiple of NFS_DIRBLKSIZ <= NFS_MAXREADDIR 2536 * - calls VOP_READDIR() 2537 * - loops around building the reply 2538 * if the output generated exceeds count break out of loop 2539 * The nfsm_clget macro is used here so that the reply will be packed 2540 * tightly in mbuf clusters. 2541 * - it only knows that it has encountered eof when the VOP_READDIR() 2542 * reads nothing 2543 * - as such one readdir rpc will return eof false although you are there 2544 * and then the next will return eof 2545 * - it trims out records with d_fileno == 0 2546 * this doesn't matter for Unix clients, but they might confuse clients 2547 * for other os'. 2548 * - it trims out records with d_type == DT_WHT 2549 * these cannot be seen through NFS (unless we extend the protocol) 2550 * NB: It is tempting to set eof to true if the VOP_READDIR() reads less 2551 * than requested, but this may not apply to all filesystems. For 2552 * example, client NFS does not { although it is never remote mounted 2553 * anyhow } 2554 * The alternate call nfsrv_readdirplus() does lookups as well. 2555 * PS: The NFS protocol spec. does not clarify what the "count" byte 2556 * argument is a count of.. just name strings and file id's or the 2557 * entire reply rpc or ... 2558 * I tried just file name and id sizes and it confused the Sun client, 2559 * so I am using the full rpc size now. The "paranoia.." comment refers 2560 * to including the status longwords that are not a part of the dir. 2561 * "entry" structures, but are in the rpc. 2562 */ 2563 struct flrep { 2564 nfsuint64 fl_off; 2565 u_int32_t fl_postopok; 2566 u_int32_t fl_fattr[NFSX_V3FATTR / sizeof (u_int32_t)]; 2567 u_int32_t fl_fhok; 2568 u_int32_t fl_fhsize; 2569 u_int32_t fl_nfh[NFSX_V3FH / sizeof (u_int32_t)]; 2570 }; 2571 2572 int 2573 nfsrv_readdir(nfsd, slp, procp, mrq) 2574 struct nfsrv_descript *nfsd; 2575 struct nfssvc_sock *slp; 2576 struct proc *procp; 2577 struct mbuf **mrq; 2578 { 2579 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2580 struct mbuf *nam = nfsd->nd_nam; 2581 caddr_t dpos = nfsd->nd_dpos; 2582 struct ucred *cred = &nfsd->nd_cr; 2583 char *bp, *be; 2584 struct mbuf *mp; 2585 struct dirent *dp; 2586 caddr_t cp; 2587 u_int32_t *tl; 2588 int32_t t1; 2589 caddr_t bpos; 2590 struct mbuf *mb, *mreq, *mp2; 2591 char *cpos, *cend, *cp2, *rbuf; 2592 struct vnode *vp; 2593 struct vattr at; 2594 nfsfh_t nfh; 2595 fhandle_t *fhp; 2596 struct uio io; 2597 struct iovec iv; 2598 int len, nlen, rem, xfer, tsiz, i, error = 0, getret = 1; 2599 int siz, cnt, fullsiz, eofflag, rdonly, cache, ncookies; 2600 int v3 = (nfsd->nd_flag & ND_NFSV3); 2601 u_quad_t frev, off, toff, verf; 2602 off_t *cookies = NULL, *cookiep; 2603 nfsuint64 jar; 2604 2605 fhp = &nfh.fh_generic; 2606 nfsm_srvmtofh(fhp); 2607 if (v3) { 2608 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 2609 toff = fxdr_hyper(tl); 2610 tl += 2; 2611 verf = fxdr_hyper(tl); 2612 tl += 2; 2613 } else { 2614 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2615 toff = fxdr_unsigned(u_quad_t, *tl++); 2616 } 2617 off = toff; 2618 cnt = fxdr_unsigned(int, *tl); 2619 siz = ((cnt + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1)); 2620 xfer = NFS_SRVMAXDATA(nfsd); 2621 if (siz > xfer) 2622 siz = xfer; 2623 fullsiz = siz; 2624 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 2625 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2626 if (!error && vp->v_type != VDIR) { 2627 error = ENOTDIR; 2628 vput(vp); 2629 } 2630 if (error) { 2631 nfsm_reply(NFSX_UNSIGNED); 2632 nfsm_srvpostop_attr(getret, &at); 2633 return (0); 2634 } 2635 nqsrv_getl(vp, ND_READ); 2636 if (v3) { 2637 error = getret = VOP_GETATTR(vp, &at, cred, procp); 2638 #ifdef NFS3_STRICTVERF 2639 /* 2640 * XXX This check is too strict for Solaris 2.5 clients. 2641 */ 2642 if (!error && toff && verf != at.va_filerev) 2643 error = NFSERR_BAD_COOKIE; 2644 #endif 2645 } 2646 if (!error) 2647 error = nfsrv_access(vp, VEXEC, cred, rdonly, procp, 0); 2648 if (error) { 2649 vput(vp); 2650 nfsm_reply(NFSX_POSTOPATTR(v3)); 2651 nfsm_srvpostop_attr(getret, &at); 2652 return (0); 2653 } 2654 VOP_UNLOCK(vp, 0); 2655 rbuf = malloc(siz, M_TEMP, M_WAITOK); 2656 again: 2657 iv.iov_base = rbuf; 2658 iv.iov_len = fullsiz; 2659 io.uio_iov = &iv; 2660 io.uio_iovcnt = 1; 2661 io.uio_offset = (off_t)off; 2662 io.uio_resid = fullsiz; 2663 io.uio_segflg = UIO_SYSSPACE; 2664 io.uio_rw = UIO_READ; 2665 io.uio_procp = NULL; 2666 eofflag = 0; 2667 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2668 2669 error = VOP_READDIR(vp, &io, cred, &eofflag, &cookies, &ncookies); 2670 2671 off = (off_t)io.uio_offset; 2672 if (!cookies && !error) 2673 error = NFSERR_PERM; 2674 if (v3) { 2675 getret = VOP_GETATTR(vp, &at, cred, procp); 2676 if (!error) 2677 error = getret; 2678 } 2679 2680 VOP_UNLOCK(vp, 0); 2681 if (error) { 2682 vrele(vp); 2683 free((caddr_t)rbuf, M_TEMP); 2684 if (cookies) 2685 free((caddr_t)cookies, M_TEMP); 2686 nfsm_reply(NFSX_POSTOPATTR(v3)); 2687 nfsm_srvpostop_attr(getret, &at); 2688 return (0); 2689 } 2690 if (io.uio_resid) { 2691 siz -= io.uio_resid; 2692 2693 /* 2694 * If nothing read, return eof 2695 * rpc reply 2696 */ 2697 if (siz == 0) { 2698 vrele(vp); 2699 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_COOKIEVERF(v3) + 2700 2 * NFSX_UNSIGNED); 2701 if (v3) { 2702 nfsm_srvpostop_attr(getret, &at); 2703 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 2704 txdr_hyper(at.va_filerev, tl); 2705 tl += 2; 2706 } else 2707 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2708 *tl++ = nfs_false; 2709 *tl = nfs_true; 2710 free((caddr_t)rbuf, M_TEMP); 2711 free((caddr_t)cookies, M_TEMP); 2712 return (0); 2713 } 2714 } 2715 2716 /* 2717 * Check for degenerate cases of nothing useful read. 2718 * If so go try again 2719 */ 2720 cpos = rbuf; 2721 cend = rbuf + siz; 2722 dp = (struct dirent *)cpos; 2723 cookiep = cookies; 2724 2725 while (cpos < cend && ncookies > 0 && 2726 (dp->d_fileno == 0 || dp->d_type == DT_WHT)) { 2727 cpos += dp->d_reclen; 2728 dp = (struct dirent *)cpos; 2729 cookiep++; 2730 ncookies--; 2731 } 2732 if (cpos >= cend || ncookies == 0) { 2733 toff = off; 2734 siz = fullsiz; 2735 goto again; 2736 } 2737 2738 len = 3 * NFSX_UNSIGNED; /* paranoia, probably can be 0 */ 2739 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_COOKIEVERF(v3) + siz); 2740 if (v3) { 2741 nfsm_srvpostop_attr(getret, &at); 2742 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2743 txdr_hyper(at.va_filerev, tl); 2744 } 2745 mp = mp2 = mb; 2746 bp = bpos; 2747 be = bp + M_TRAILINGSPACE(mp); 2748 2749 /* Loop through the records and build reply */ 2750 while (cpos < cend && ncookies > 0) { 2751 if (dp->d_fileno != 0 && dp->d_type != DT_WHT) { 2752 nlen = dp->d_namlen; 2753 rem = nfsm_rndup(nlen)-nlen; 2754 len += (4 * NFSX_UNSIGNED + nlen + rem); 2755 if (v3) 2756 len += 2 * NFSX_UNSIGNED; 2757 if (len > cnt) { 2758 eofflag = 0; 2759 break; 2760 } 2761 /* 2762 * Build the directory record xdr from 2763 * the dirent entry. 2764 */ 2765 nfsm_clget; 2766 *tl = nfs_true; 2767 bp += NFSX_UNSIGNED; 2768 if (v3) { 2769 nfsm_clget; 2770 *tl = txdr_unsigned(dp->d_fileno >> 32); 2771 bp += NFSX_UNSIGNED; 2772 } 2773 nfsm_clget; 2774 *tl = txdr_unsigned(dp->d_fileno); 2775 bp += NFSX_UNSIGNED; 2776 nfsm_clget; 2777 *tl = txdr_unsigned(nlen); 2778 bp += NFSX_UNSIGNED; 2779 2780 /* And loop around copying the name */ 2781 xfer = nlen; 2782 cp = dp->d_name; 2783 while (xfer > 0) { 2784 nfsm_clget; 2785 if ((bp+xfer) > be) 2786 tsiz = be-bp; 2787 else 2788 tsiz = xfer; 2789 memcpy(bp, cp, tsiz); 2790 bp += tsiz; 2791 xfer -= tsiz; 2792 if (xfer > 0) 2793 cp += tsiz; 2794 } 2795 /* And null pad to an int32_t boundary */ 2796 for (i = 0; i < rem; i++) 2797 *bp++ = '\0'; 2798 nfsm_clget; 2799 2800 /* Finish off the record */ 2801 txdr_hyper(*cookiep, &jar); 2802 if (v3) { 2803 *tl = jar.nfsuquad[0]; 2804 bp += NFSX_UNSIGNED; 2805 nfsm_clget; 2806 } 2807 *tl = jar.nfsuquad[1]; 2808 bp += NFSX_UNSIGNED; 2809 } 2810 cpos += dp->d_reclen; 2811 dp = (struct dirent *)cpos; 2812 cookiep++; 2813 ncookies--; 2814 } 2815 vrele(vp); 2816 nfsm_clget; 2817 *tl = nfs_false; 2818 bp += NFSX_UNSIGNED; 2819 nfsm_clget; 2820 if (eofflag) 2821 *tl = nfs_true; 2822 else 2823 *tl = nfs_false; 2824 bp += NFSX_UNSIGNED; 2825 if (mp != mb) { 2826 if (bp < be) 2827 mp->m_len = bp - mtod(mp, caddr_t); 2828 } else 2829 mp->m_len += bp - bpos; 2830 free((caddr_t)rbuf, M_TEMP); 2831 free((caddr_t)cookies, M_TEMP); 2832 nfsm_srvdone; 2833 } 2834 2835 int 2836 nfsrv_readdirplus(nfsd, slp, procp, mrq) 2837 struct nfsrv_descript *nfsd; 2838 struct nfssvc_sock *slp; 2839 struct proc *procp; 2840 struct mbuf **mrq; 2841 { 2842 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2843 struct mbuf *nam = nfsd->nd_nam; 2844 caddr_t dpos = nfsd->nd_dpos; 2845 struct ucred *cred = &nfsd->nd_cr; 2846 char *bp, *be; 2847 struct mbuf *mp; 2848 struct dirent *dp; 2849 caddr_t cp; 2850 u_int32_t *tl; 2851 int32_t t1; 2852 caddr_t bpos; 2853 struct mbuf *mb, *mreq, *mp2; 2854 char *cpos, *cend, *cp2, *rbuf; 2855 struct vnode *vp, *nvp; 2856 struct flrep fl; 2857 nfsfh_t nfh; 2858 fhandle_t *fhp, *nfhp = (fhandle_t *)fl.fl_nfh; 2859 struct uio io; 2860 struct iovec iv; 2861 struct vattr va, at, *vap = &va; 2862 struct nfs_fattr *fp; 2863 int len, nlen, rem, xfer, tsiz, i, error = 0, getret = 1; 2864 int siz, cnt, fullsiz, eofflag, rdonly, cache, dirlen, ncookies; 2865 u_quad_t frev, off, toff, verf; 2866 off_t *cookies = NULL, *cookiep; 2867 2868 fhp = &nfh.fh_generic; 2869 nfsm_srvmtofh(fhp); 2870 nfsm_dissect(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 2871 toff = fxdr_hyper(tl); 2872 tl += 2; 2873 verf = fxdr_hyper(tl); 2874 tl += 2; 2875 siz = fxdr_unsigned(int, *tl++); 2876 cnt = fxdr_unsigned(int, *tl); 2877 off = toff; 2878 siz = ((siz + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1)); 2879 xfer = NFS_SRVMAXDATA(nfsd); 2880 if (siz > xfer) 2881 siz = xfer; 2882 fullsiz = siz; 2883 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 2884 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2885 if (!error && vp->v_type != VDIR) { 2886 error = ENOTDIR; 2887 vput(vp); 2888 } 2889 if (error) { 2890 nfsm_reply(NFSX_UNSIGNED); 2891 nfsm_srvpostop_attr(getret, &at); 2892 return (0); 2893 } 2894 error = getret = VOP_GETATTR(vp, &at, cred, procp); 2895 #ifdef NFS3_STRICTVERF 2896 /* 2897 * XXX This check is too strict for Solaris 2.5 clients. 2898 */ 2899 if (!error && toff && verf != at.va_filerev) 2900 error = NFSERR_BAD_COOKIE; 2901 #endif 2902 if (!error) { 2903 nqsrv_getl(vp, ND_READ); 2904 error = nfsrv_access(vp, VEXEC, cred, rdonly, procp, 0); 2905 } 2906 if (error) { 2907 vput(vp); 2908 nfsm_reply(NFSX_V3POSTOPATTR); 2909 nfsm_srvpostop_attr(getret, &at); 2910 return (0); 2911 } 2912 VOP_UNLOCK(vp, 0); 2913 2914 rbuf = malloc(siz, M_TEMP, M_WAITOK); 2915 again: 2916 iv.iov_base = rbuf; 2917 iv.iov_len = fullsiz; 2918 io.uio_iov = &iv; 2919 io.uio_iovcnt = 1; 2920 io.uio_offset = (off_t)off; 2921 io.uio_resid = fullsiz; 2922 io.uio_segflg = UIO_SYSSPACE; 2923 io.uio_rw = UIO_READ; 2924 io.uio_procp = NULL; 2925 eofflag = 0; 2926 2927 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2928 2929 error = VOP_READDIR(vp, &io, cred, &eofflag, &cookies, &ncookies); 2930 2931 off = (u_quad_t)io.uio_offset; 2932 getret = VOP_GETATTR(vp, &at, cred, procp); 2933 2934 VOP_UNLOCK(vp, 0); 2935 2936 /* 2937 * If the VGET operation doesn't work for this filesystem, 2938 * we can't support readdirplus. Returning NOTSUPP should 2939 * make clients fall back to plain readdir. 2940 * There's no need to check for VPTOFH as well, we wouldn't 2941 * even be here otherwise. 2942 */ 2943 if (!getret) { 2944 if ((getret = VFS_VGET(vp->v_mount, at.va_fileid, &nvp))) 2945 getret = (getret == EOPNOTSUPP) ? 2946 NFSERR_NOTSUPP : NFSERR_IO; 2947 else 2948 vput(nvp); 2949 } 2950 2951 if (!cookies && !error) 2952 error = NFSERR_PERM; 2953 if (!error) 2954 error = getret; 2955 if (error) { 2956 vrele(vp); 2957 if (cookies) 2958 free((caddr_t)cookies, M_TEMP); 2959 free((caddr_t)rbuf, M_TEMP); 2960 nfsm_reply(NFSX_V3POSTOPATTR); 2961 nfsm_srvpostop_attr(getret, &at); 2962 return (0); 2963 } 2964 if (io.uio_resid) { 2965 siz -= io.uio_resid; 2966 2967 /* 2968 * If nothing read, return eof 2969 * rpc reply 2970 */ 2971 if (siz == 0) { 2972 vrele(vp); 2973 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF + 2974 2 * NFSX_UNSIGNED); 2975 nfsm_srvpostop_attr(getret, &at); 2976 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 2977 txdr_hyper(at.va_filerev, tl); 2978 tl += 2; 2979 *tl++ = nfs_false; 2980 *tl = nfs_true; 2981 free((caddr_t)cookies, M_TEMP); 2982 free((caddr_t)rbuf, M_TEMP); 2983 return (0); 2984 } 2985 } 2986 2987 /* 2988 * Check for degenerate cases of nothing useful read. 2989 * If so go try again 2990 */ 2991 cpos = rbuf; 2992 cend = rbuf + siz; 2993 dp = (struct dirent *)cpos; 2994 cookiep = cookies; 2995 2996 while (cpos < cend && ncookies > 0 && 2997 (dp->d_fileno == 0 || dp->d_type == DT_WHT)) { 2998 cpos += dp->d_reclen; 2999 dp = (struct dirent *)cpos; 3000 cookiep++; 3001 ncookies--; 3002 } 3003 if (cpos >= cend || ncookies == 0) { 3004 toff = off; 3005 siz = fullsiz; 3006 goto again; 3007 } 3008 3009 dirlen = len = NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF + 2 * NFSX_UNSIGNED; 3010 nfsm_reply(cnt); 3011 nfsm_srvpostop_attr(getret, &at); 3012 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 3013 txdr_hyper(at.va_filerev, tl); 3014 mp = mp2 = mb; 3015 bp = bpos; 3016 be = bp + M_TRAILINGSPACE(mp); 3017 3018 /* Loop through the records and build reply */ 3019 while (cpos < cend && ncookies > 0) { 3020 if (dp->d_fileno != 0 && dp->d_type != DT_WHT) { 3021 nlen = dp->d_namlen; 3022 rem = nfsm_rndup(nlen)-nlen; 3023 3024 /* 3025 * For readdir_and_lookup get the vnode using 3026 * the file number. 3027 */ 3028 if (VFS_VGET(vp->v_mount, dp->d_fileno, &nvp)) 3029 goto invalid; 3030 memset((caddr_t)nfhp, 0, NFSX_V3FH); 3031 nfhp->fh_fsid = 3032 nvp->v_mount->mnt_stat.f_fsidx; 3033 if (VFS_VPTOFH(nvp, &nfhp->fh_fid)) { 3034 vput(nvp); 3035 goto invalid; 3036 } 3037 if (VOP_GETATTR(nvp, vap, cred, procp)) { 3038 vput(nvp); 3039 goto invalid; 3040 } 3041 vput(nvp); 3042 3043 /* 3044 * If either the dircount or maxcount will be 3045 * exceeded, get out now. Both of these lengths 3046 * are calculated conservatively, including all 3047 * XDR overheads. 3048 */ 3049 len += (8 * NFSX_UNSIGNED + nlen + rem + NFSX_V3FH + 3050 NFSX_V3POSTOPATTR); 3051 dirlen += (6 * NFSX_UNSIGNED + nlen + rem); 3052 if (len > cnt || dirlen > fullsiz) { 3053 eofflag = 0; 3054 break; 3055 } 3056 3057 /* 3058 * Build the directory record xdr from 3059 * the dirent entry. 3060 */ 3061 fp = (struct nfs_fattr *)&fl.fl_fattr; 3062 nfsm_srvfillattr(vap, fp); 3063 fl.fl_fhsize = txdr_unsigned(NFSX_V3FH); 3064 fl.fl_fhok = nfs_true; 3065 fl.fl_postopok = nfs_true; 3066 txdr_hyper(*cookiep, fl.fl_off.nfsuquad); 3067 3068 nfsm_clget; 3069 *tl = nfs_true; 3070 bp += NFSX_UNSIGNED; 3071 nfsm_clget; 3072 *tl = txdr_unsigned(dp->d_fileno >> 32); 3073 bp += NFSX_UNSIGNED; 3074 nfsm_clget; 3075 *tl = txdr_unsigned(dp->d_fileno); 3076 bp += NFSX_UNSIGNED; 3077 nfsm_clget; 3078 *tl = txdr_unsigned(nlen); 3079 bp += NFSX_UNSIGNED; 3080 3081 /* And loop around copying the name */ 3082 xfer = nlen; 3083 cp = dp->d_name; 3084 while (xfer > 0) { 3085 nfsm_clget; 3086 if ((bp + xfer) > be) 3087 tsiz = be - bp; 3088 else 3089 tsiz = xfer; 3090 memcpy(bp, cp, tsiz); 3091 bp += tsiz; 3092 xfer -= tsiz; 3093 if (xfer > 0) 3094 cp += tsiz; 3095 } 3096 /* And null pad to an int32_t boundary */ 3097 for (i = 0; i < rem; i++) 3098 *bp++ = '\0'; 3099 3100 /* 3101 * Now copy the flrep structure out. 3102 */ 3103 xfer = sizeof (struct flrep); 3104 cp = (caddr_t)&fl; 3105 while (xfer > 0) { 3106 nfsm_clget; 3107 if ((bp + xfer) > be) 3108 tsiz = be - bp; 3109 else 3110 tsiz = xfer; 3111 memcpy(bp, cp, tsiz); 3112 bp += tsiz; 3113 xfer -= tsiz; 3114 if (xfer > 0) 3115 cp += tsiz; 3116 } 3117 } 3118 invalid: 3119 cpos += dp->d_reclen; 3120 dp = (struct dirent *)cpos; 3121 cookiep++; 3122 ncookies--; 3123 } 3124 vrele(vp); 3125 nfsm_clget; 3126 *tl = nfs_false; 3127 bp += NFSX_UNSIGNED; 3128 nfsm_clget; 3129 if (eofflag) 3130 *tl = nfs_true; 3131 else 3132 *tl = nfs_false; 3133 bp += NFSX_UNSIGNED; 3134 if (mp != mb) { 3135 if (bp < be) 3136 mp->m_len = bp - mtod(mp, caddr_t); 3137 } else 3138 mp->m_len += bp - bpos; 3139 free((caddr_t)cookies, M_TEMP); 3140 free((caddr_t)rbuf, M_TEMP); 3141 nfsm_srvdone; 3142 } 3143 3144 /* 3145 * nfs commit service 3146 */ 3147 int 3148 nfsrv_commit(nfsd, slp, procp, mrq) 3149 struct nfsrv_descript *nfsd; 3150 struct nfssvc_sock *slp; 3151 struct proc *procp; 3152 struct mbuf **mrq; 3153 { 3154 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3155 struct mbuf *nam = nfsd->nd_nam; 3156 caddr_t dpos = nfsd->nd_dpos; 3157 struct ucred *cred = &nfsd->nd_cr; 3158 struct vattr bfor, aft; 3159 struct vnode *vp; 3160 nfsfh_t nfh; 3161 fhandle_t *fhp; 3162 u_int32_t *tl; 3163 int32_t t1; 3164 caddr_t bpos; 3165 int error = 0, rdonly, for_ret = 1, aft_ret = 1, cache; 3166 uint32_t cnt; 3167 char *cp2; 3168 struct mbuf *mb, *mreq; 3169 u_quad_t frev, off, end; 3170 struct mount *mp = NULL; 3171 3172 #ifndef nolint 3173 cache = 0; 3174 #endif 3175 fhp = &nfh.fh_generic; 3176 nfsm_srvmtofh(fhp); 3177 if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) 3178 return (ESTALE); 3179 vn_start_write(NULL, &mp, V_WAIT); 3180 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 3181 3182 off = fxdr_hyper(tl); 3183 tl += 2; 3184 cnt = fxdr_unsigned(uint32_t, *tl); 3185 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 3186 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 3187 if (error) { 3188 nfsm_reply(2 * NFSX_UNSIGNED); 3189 nfsm_srvwcc_data(for_ret, &bfor, aft_ret, &aft); 3190 vn_finished_write(mp, 0); 3191 return (0); 3192 } 3193 for_ret = VOP_GETATTR(vp, &bfor, cred, procp); 3194 end = (cnt > 0) ? off + cnt : vp->v_size; 3195 if (end < off || end > vp->v_size) 3196 end = vp->v_size; 3197 if (off < vp->v_size) 3198 error = VOP_FSYNC(vp, cred, FSYNC_WAIT, off, end, procp); 3199 /* else error == 0, from nfsrv_fhtovp() */ 3200 aft_ret = VOP_GETATTR(vp, &aft, cred, procp); 3201 vput(vp); 3202 nfsm_reply(NFSX_V3WCCDATA + NFSX_V3WRITEVERF); 3203 nfsm_srvwcc_data(for_ret, &bfor, aft_ret, &aft); 3204 if (!error) { 3205 nfsm_build(tl, u_int32_t *, NFSX_V3WRITEVERF); 3206 *tl++ = txdr_unsigned(boottime.tv_sec); 3207 *tl = txdr_unsigned(boottime.tv_usec); 3208 } else { 3209 vn_finished_write(mp, 0); 3210 return (0); 3211 } 3212 vn_finished_write(mp, 0); 3213 nfsm_srvdone; 3214 } 3215 3216 /* 3217 * nfs statfs service 3218 */ 3219 int 3220 nfsrv_statfs(nfsd, slp, procp, mrq) 3221 struct nfsrv_descript *nfsd; 3222 struct nfssvc_sock *slp; 3223 struct proc *procp; 3224 struct mbuf **mrq; 3225 { 3226 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3227 struct mbuf *nam = nfsd->nd_nam; 3228 caddr_t dpos = nfsd->nd_dpos; 3229 struct ucred *cred = &nfsd->nd_cr; 3230 struct statvfs *sf; 3231 struct nfs_statfs *sfp; 3232 u_int32_t *tl; 3233 int32_t t1; 3234 caddr_t bpos; 3235 int error = 0, rdonly, cache, getret = 1; 3236 int v3 = (nfsd->nd_flag & ND_NFSV3); 3237 char *cp2; 3238 struct mbuf *mb, *mreq; 3239 struct vnode *vp; 3240 struct vattr at; 3241 nfsfh_t nfh; 3242 fhandle_t *fhp; 3243 struct statvfs statvfs; 3244 u_quad_t frev, tval; 3245 3246 #ifndef nolint 3247 cache = 0; 3248 #endif 3249 fhp = &nfh.fh_generic; 3250 nfsm_srvmtofh(fhp); 3251 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 3252 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 3253 if (error) { 3254 nfsm_reply(NFSX_UNSIGNED); 3255 nfsm_srvpostop_attr(getret, &at); 3256 return (0); 3257 } 3258 sf = &statvfs; 3259 error = VFS_STATVFS(vp->v_mount, sf, procp); 3260 getret = VOP_GETATTR(vp, &at, cred, procp); 3261 vput(vp); 3262 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_STATFS(v3)); 3263 if (v3) 3264 nfsm_srvpostop_attr(getret, &at); 3265 if (error) 3266 return (0); 3267 nfsm_build(sfp, struct nfs_statfs *, NFSX_STATFS(v3)); 3268 if (v3) { 3269 tval = (u_quad_t)((quad_t)sf->f_blocks * (quad_t)sf->f_frsize); 3270 txdr_hyper(tval, &sfp->sf_tbytes); 3271 tval = (u_quad_t)((quad_t)sf->f_bfree * (quad_t)sf->f_frsize); 3272 txdr_hyper(tval, &sfp->sf_fbytes); 3273 tval = (u_quad_t)((quad_t)sf->f_bavail * (quad_t)sf->f_frsize); 3274 txdr_hyper(tval, &sfp->sf_abytes); 3275 tval = (u_quad_t)sf->f_files; 3276 txdr_hyper(tval, &sfp->sf_tfiles); 3277 tval = (u_quad_t)sf->f_ffree; 3278 txdr_hyper(tval, &sfp->sf_ffiles); 3279 txdr_hyper(tval, &sfp->sf_afiles); 3280 sfp->sf_invarsec = 0; 3281 } else { 3282 sfp->sf_tsize = txdr_unsigned(NFS_MAXDGRAMDATA); 3283 sfp->sf_bsize = txdr_unsigned(sf->f_frsize); 3284 sfp->sf_blocks = txdr_unsigned(sf->f_blocks); 3285 sfp->sf_bfree = txdr_unsigned(sf->f_bfree); 3286 sfp->sf_bavail = txdr_unsigned(sf->f_bavail); 3287 } 3288 nfsm_srvdone; 3289 } 3290 3291 /* 3292 * nfs fsinfo service 3293 */ 3294 int 3295 nfsrv_fsinfo(nfsd, slp, procp, mrq) 3296 struct nfsrv_descript *nfsd; 3297 struct nfssvc_sock *slp; 3298 struct proc *procp; 3299 struct mbuf **mrq; 3300 { 3301 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3302 struct mbuf *nam = nfsd->nd_nam; 3303 caddr_t dpos = nfsd->nd_dpos; 3304 struct ucred *cred = &nfsd->nd_cr; 3305 u_int32_t *tl; 3306 struct nfsv3_fsinfo *sip; 3307 int32_t t1; 3308 caddr_t bpos; 3309 int error = 0, rdonly, cache, getret = 1; 3310 uint32_t maxdata; 3311 char *cp2; 3312 struct mbuf *mb, *mreq; 3313 struct vnode *vp; 3314 struct vattr at; 3315 nfsfh_t nfh; 3316 fhandle_t *fhp; 3317 u_quad_t frev, maxfsize; 3318 struct statvfs sb; 3319 3320 #ifndef nolint 3321 cache = 0; 3322 #endif 3323 fhp = &nfh.fh_generic; 3324 nfsm_srvmtofh(fhp); 3325 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 3326 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 3327 if (error) { 3328 nfsm_reply(NFSX_UNSIGNED); 3329 nfsm_srvpostop_attr(getret, &at); 3330 return (0); 3331 } 3332 3333 /* XXX Try to make a guess on the max file size. */ 3334 VFS_STATVFS(vp->v_mount, &sb, (struct proc *)0); 3335 maxfsize = (u_quad_t)0x80000000 * sb.f_frsize - 1; 3336 3337 getret = VOP_GETATTR(vp, &at, cred, procp); 3338 vput(vp); 3339 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3FSINFO); 3340 nfsm_srvpostop_attr(getret, &at); 3341 nfsm_build(sip, struct nfsv3_fsinfo *, NFSX_V3FSINFO); 3342 3343 /* 3344 * XXX 3345 * There should be file system VFS OP(s) to get this information. 3346 * For now, assume ufs. 3347 */ 3348 if (slp->ns_so->so_type == SOCK_DGRAM) 3349 maxdata = NFS_MAXDGRAMDATA; 3350 else 3351 maxdata = NFS_MAXDATA; 3352 sip->fs_rtmax = txdr_unsigned(maxdata); 3353 sip->fs_rtpref = txdr_unsigned(maxdata); 3354 sip->fs_rtmult = txdr_unsigned(NFS_FABLKSIZE); 3355 sip->fs_wtmax = txdr_unsigned(maxdata); 3356 sip->fs_wtpref = txdr_unsigned(maxdata); 3357 sip->fs_wtmult = txdr_unsigned(NFS_FABLKSIZE); 3358 sip->fs_dtpref = txdr_unsigned(maxdata); 3359 txdr_hyper(maxfsize, &sip->fs_maxfilesize); 3360 sip->fs_timedelta.nfsv3_sec = 0; 3361 sip->fs_timedelta.nfsv3_nsec = txdr_unsigned(1); 3362 sip->fs_properties = txdr_unsigned(NFSV3FSINFO_LINK | 3363 NFSV3FSINFO_SYMLINK | NFSV3FSINFO_HOMOGENEOUS | 3364 NFSV3FSINFO_CANSETTIME); 3365 nfsm_srvdone; 3366 } 3367 3368 /* 3369 * nfs pathconf service 3370 */ 3371 int 3372 nfsrv_pathconf(nfsd, slp, procp, mrq) 3373 struct nfsrv_descript *nfsd; 3374 struct nfssvc_sock *slp; 3375 struct proc *procp; 3376 struct mbuf **mrq; 3377 { 3378 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3379 struct mbuf *nam = nfsd->nd_nam; 3380 caddr_t dpos = nfsd->nd_dpos; 3381 struct ucred *cred = &nfsd->nd_cr; 3382 u_int32_t *tl; 3383 struct nfsv3_pathconf *pc; 3384 int32_t t1; 3385 caddr_t bpos; 3386 int error = 0, rdonly, cache, getret = 1; 3387 register_t linkmax, namemax, chownres, notrunc; 3388 char *cp2; 3389 struct mbuf *mb, *mreq; 3390 struct vnode *vp; 3391 struct vattr at; 3392 nfsfh_t nfh; 3393 fhandle_t *fhp; 3394 u_quad_t frev; 3395 3396 #ifndef nolint 3397 cache = 0; 3398 #endif 3399 fhp = &nfh.fh_generic; 3400 nfsm_srvmtofh(fhp); 3401 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 3402 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 3403 if (error) { 3404 nfsm_reply(NFSX_UNSIGNED); 3405 nfsm_srvpostop_attr(getret, &at); 3406 return (0); 3407 } 3408 error = VOP_PATHCONF(vp, _PC_LINK_MAX, &linkmax); 3409 if (!error) 3410 error = VOP_PATHCONF(vp, _PC_NAME_MAX, &namemax); 3411 if (!error) 3412 error = VOP_PATHCONF(vp, _PC_CHOWN_RESTRICTED, &chownres); 3413 if (!error) 3414 error = VOP_PATHCONF(vp, _PC_NO_TRUNC, ¬runc); 3415 getret = VOP_GETATTR(vp, &at, cred, procp); 3416 vput(vp); 3417 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3PATHCONF); 3418 nfsm_srvpostop_attr(getret, &at); 3419 if (error) 3420 return (0); 3421 nfsm_build(pc, struct nfsv3_pathconf *, NFSX_V3PATHCONF); 3422 3423 pc->pc_linkmax = txdr_unsigned(linkmax); 3424 pc->pc_namemax = txdr_unsigned(namemax); 3425 pc->pc_notrunc = txdr_unsigned(notrunc); 3426 pc->pc_chownrestricted = txdr_unsigned(chownres); 3427 3428 /* 3429 * These should probably be supported by VOP_PATHCONF(), but 3430 * until msdosfs is exportable (why would you want to?), the 3431 * Unix defaults should be ok. 3432 */ 3433 pc->pc_caseinsensitive = nfs_false; 3434 pc->pc_casepreserving = nfs_true; 3435 nfsm_srvdone; 3436 } 3437 3438 /* 3439 * Null operation, used by clients to ping server 3440 */ 3441 /* ARGSUSED */ 3442 int 3443 nfsrv_null(nfsd, slp, procp, mrq) 3444 struct nfsrv_descript *nfsd; 3445 struct nfssvc_sock *slp; 3446 struct proc *procp; 3447 struct mbuf **mrq; 3448 { 3449 struct mbuf *mrep = nfsd->nd_mrep; 3450 caddr_t bpos; 3451 int error = NFSERR_RETVOID, cache = 0; 3452 struct mbuf *mb, *mreq; 3453 u_quad_t frev; 3454 3455 nfsm_reply(0); 3456 return (0); 3457 } 3458 3459 /* 3460 * No operation, used for obsolete procedures 3461 */ 3462 /* ARGSUSED */ 3463 int 3464 nfsrv_noop(nfsd, slp, procp, mrq) 3465 struct nfsrv_descript *nfsd; 3466 struct nfssvc_sock *slp; 3467 struct proc *procp; 3468 struct mbuf **mrq; 3469 { 3470 struct mbuf *mrep = nfsd->nd_mrep; 3471 caddr_t bpos; 3472 int error, cache = 0; 3473 struct mbuf *mb, *mreq; 3474 u_quad_t frev; 3475 3476 if (nfsd->nd_repstat) 3477 error = nfsd->nd_repstat; 3478 else 3479 error = EPROCUNAVAIL; 3480 nfsm_reply(0); 3481 return (0); 3482 } 3483 3484 /* 3485 * Perform access checking for vnodes obtained from file handles that would 3486 * refer to files already opened by a Unix client. You cannot just use 3487 * vn_writechk() and VOP_ACCESS() for two reasons. 3488 * 1 - You must check for exported rdonly as well as MNT_RDONLY for the write case 3489 * 2 - The owner is to be given access irrespective of mode bits for some 3490 * operations, so that processes that chmod after opening a file don't 3491 * break. I don't like this because it opens a security hole, but since 3492 * the nfs server opens a security hole the size of a barn door anyhow, 3493 * what the heck. 3494 * 3495 * The exception to rule 2 is EPERM. If a file is IMMUTABLE, VOP_ACCESS() 3496 * will return EPERM instead of EACCESS. EPERM is always an error. 3497 */ 3498 int 3499 nfsrv_access(vp, flags, cred, rdonly, p, override) 3500 struct vnode *vp; 3501 int flags; 3502 struct ucred *cred; 3503 int rdonly; 3504 struct proc *p; 3505 { 3506 struct vattr vattr; 3507 int error; 3508 if (flags & VWRITE) { 3509 /* Just vn_writechk() changed to check rdonly */ 3510 /* 3511 * Disallow write attempts on read-only file systems; 3512 * unless the file is a socket or a block or character 3513 * device resident on the file system. 3514 */ 3515 if (rdonly || (vp->v_mount->mnt_flag & MNT_RDONLY)) { 3516 switch (vp->v_type) { 3517 case VREG: 3518 case VDIR: 3519 case VLNK: 3520 return (EROFS); 3521 default: 3522 break; 3523 } 3524 } 3525 3526 /* 3527 * If the vnode is in use as a process's text, 3528 * we can't allow writing. 3529 */ 3530 if (vp->v_flag & VTEXT) 3531 return (ETXTBSY); 3532 } 3533 error = VOP_GETATTR(vp, &vattr, cred, p); 3534 if (error) 3535 return (error); 3536 error = VOP_ACCESS(vp, flags, cred, p); 3537 /* 3538 * Allow certain operations for the owner (reads and writes 3539 * on files that are already open). 3540 */ 3541 if (override && error == EACCES && cred->cr_uid == vattr.va_uid) 3542 error = 0; 3543 return error; 3544 } 3545
Indexes created Mon Sep 22 10:09:38 GMT 2025