nfs_serv.c revision 1.79
1 /* $NetBSD: nfs_serv.c,v 1.79 2003/06/29 22:32:16 fvdl Exp $ */ 2 3 /* 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Rick Macklem at The University of Guelph. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)nfs_serv.c 8.8 (Berkeley) 7/31/95 39 */ 40 41 /* 42 * nfs version 2 and 3 server calls to vnode ops 43 * - these routines generally have 3 phases 44 * 1 - break down and validate rpc request in mbuf list 45 * 2 - do the vnode ops for the request 46 * (surprisingly ?? many are very similar to syscalls in vfs_syscalls.c) 47 * 3 - build the rpc reply in an mbuf list 48 * nb: 49 * - do not mix the phases, since the nfsm_?? macros can return failures 50 * on a bad rpc or similar and do not do any vrele() or vput()'s 51 * 52 * - the nfsm_reply() macro generates an nfs rpc reply with the nfs 53 * error number iff error != 0 whereas 54 * returning an error from the server function implies a fatal error 55 * such as a badly constructed rpc request that should be dropped without 56 * a reply. 57 * For Version 3, nfsm_reply() does not return for the error case, since 58 * most version 3 rpcs return more than the status for error cases. 59 */ 60 61 #include <sys/cdefs.h> 62 __KERNEL_RCSID(0, "$NetBSD: nfs_serv.c,v 1.79 2003/06/29 22:32:16 fvdl Exp $"); 63 64 #include <sys/param.h> 65 #include <sys/systm.h> 66 #include <sys/proc.h> 67 #include <sys/file.h> 68 #include <sys/namei.h> 69 #include <sys/vnode.h> 70 #include <sys/mount.h> 71 #include <sys/socket.h> 72 #include <sys/socketvar.h> 73 #include <sys/mbuf.h> 74 #include <sys/dirent.h> 75 #include <sys/stat.h> 76 #include <sys/kernel.h> 77 #include <ufs/ufs/dir.h> 78 79 #include <uvm/uvm.h> 80 81 #include <nfs/nfsproto.h> 82 #include <nfs/rpcv2.h> 83 #include <nfs/nfs.h> 84 #include <nfs/xdr_subs.h> 85 #include <nfs/nfsm_subs.h> 86 #include <nfs/nqnfs.h> 87 #include <nfs/nfs_var.h> 88 89 /* Global vars */ 90 extern u_int32_t nfs_xdrneg1; 91 extern u_int32_t nfs_false, nfs_true; 92 extern enum vtype nv3tov_type[8]; 93 extern struct nfsstats nfsstats; 94 extern const nfstype nfsv2_type[9]; 95 extern const nfstype nfsv3_type[9]; 96 int nfsrvw_procrastinate = NFS_GATHERDELAY * 1000; 97 int nfsd_use_loan = 1; /* use page-loan for READ OP */ 98 99 /* 100 * nfs v3 access service 101 */ 102 int 103 nfsrv3_access(nfsd, slp, procp, mrq) 104 struct nfsrv_descript *nfsd; 105 struct nfssvc_sock *slp; 106 struct proc *procp; 107 struct mbuf **mrq; 108 { 109 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 110 struct mbuf *nam = nfsd->nd_nam; 111 caddr_t dpos = nfsd->nd_dpos; 112 struct ucred *cred = &nfsd->nd_cr; 113 struct vnode *vp; 114 nfsfh_t nfh; 115 fhandle_t *fhp; 116 u_int32_t *tl; 117 int32_t t1; 118 caddr_t bpos; 119 int error = 0, rdonly, cache = 0, getret; 120 char *cp2; 121 struct mbuf *mb, *mreq; 122 struct vattr va; 123 u_long inmode, testmode, outmode; 124 u_quad_t frev; 125 126 fhp = &nfh.fh_generic; 127 nfsm_srvmtofh(fhp); 128 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 129 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, &rdonly, 130 (nfsd->nd_flag & ND_KERBAUTH), FALSE); 131 if (error) { 132 nfsm_reply(NFSX_UNSIGNED); 133 nfsm_srvpostop_attr(1, (struct vattr *)0); 134 return (0); 135 } 136 inmode = fxdr_unsigned(u_int32_t, *tl); 137 outmode = 0; 138 if ((inmode & NFSV3ACCESS_READ) && 139 nfsrv_access(vp, VREAD, cred, rdonly, procp, 0) == 0) 140 outmode |= NFSV3ACCESS_READ; 141 if (vp->v_type != VDIR) { 142 testmode = inmode & (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND); 143 if (testmode && 144 nfsrv_access(vp, VWRITE, cred, rdonly, procp, 0) == 0) 145 outmode |= testmode; 146 if ((inmode & NFSV3ACCESS_EXECUTE) && 147 nfsrv_access(vp, VEXEC, cred, rdonly, procp, 0) == 0) 148 outmode |= NFSV3ACCESS_EXECUTE; 149 } else { 150 testmode = inmode & (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | 151 NFSV3ACCESS_DELETE); 152 if (testmode && 153 nfsrv_access(vp, VWRITE, cred, rdonly, procp, 0) == 0) 154 outmode |= testmode; 155 if ((inmode & NFSV3ACCESS_LOOKUP) && 156 nfsrv_access(vp, VEXEC, cred, rdonly, procp, 0) == 0) 157 outmode |= NFSV3ACCESS_LOOKUP; 158 } 159 getret = VOP_GETATTR(vp, &va, cred, procp); 160 vput(vp); 161 nfsm_reply(NFSX_POSTOPATTR(1) + NFSX_UNSIGNED); 162 nfsm_srvpostop_attr(getret, &va); 163 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 164 *tl = txdr_unsigned(outmode); 165 nfsm_srvdone; 166 } 167 168 /* 169 * nfs getattr service 170 */ 171 int 172 nfsrv_getattr(nfsd, slp, procp, mrq) 173 struct nfsrv_descript *nfsd; 174 struct nfssvc_sock *slp; 175 struct proc *procp; 176 struct mbuf **mrq; 177 { 178 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 179 struct mbuf *nam = nfsd->nd_nam; 180 caddr_t dpos = nfsd->nd_dpos; 181 struct ucred *cred = &nfsd->nd_cr; 182 struct nfs_fattr *fp; 183 struct vattr va; 184 struct vnode *vp; 185 nfsfh_t nfh; 186 fhandle_t *fhp; 187 u_int32_t *tl; 188 int32_t t1; 189 caddr_t bpos; 190 int error = 0, rdonly, cache; 191 char *cp2; 192 struct mbuf *mb, *mreq; 193 u_quad_t frev; 194 195 fhp = &nfh.fh_generic; 196 nfsm_srvmtofh(fhp); 197 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, &rdonly, 198 (nfsd->nd_flag & ND_KERBAUTH), FALSE); 199 if (error) { 200 nfsm_reply(0); 201 return (0); 202 } 203 nqsrv_getl(vp, ND_READ); 204 error = VOP_GETATTR(vp, &va, cred, procp); 205 vput(vp); 206 nfsm_reply(NFSX_FATTR(nfsd->nd_flag & ND_NFSV3)); 207 if (error) 208 return (0); 209 nfsm_build(fp, struct nfs_fattr *, NFSX_FATTR(nfsd->nd_flag & ND_NFSV3)); 210 nfsm_srvfillattr(&va, fp); 211 nfsm_srvdone; 212 } 213 214 /* 215 * nfs setattr service 216 */ 217 int 218 nfsrv_setattr(nfsd, slp, procp, mrq) 219 struct nfsrv_descript *nfsd; 220 struct nfssvc_sock *slp; 221 struct proc *procp; 222 struct mbuf **mrq; 223 { 224 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 225 struct mbuf *nam = nfsd->nd_nam; 226 caddr_t dpos = nfsd->nd_dpos; 227 struct ucred *cred = &nfsd->nd_cr; 228 struct vattr va, preat; 229 struct nfsv2_sattr *sp; 230 struct nfs_fattr *fp; 231 struct vnode *vp; 232 nfsfh_t nfh; 233 fhandle_t *fhp; 234 u_int32_t *tl; 235 int32_t t1; 236 caddr_t bpos; 237 int error = 0, rdonly, cache, preat_ret = 1, postat_ret = 1; 238 int v3 = (nfsd->nd_flag & ND_NFSV3), gcheck = 0; 239 char *cp2; 240 struct mbuf *mb, *mreq; 241 u_quad_t frev; 242 struct timespec guard; 243 244 fhp = &nfh.fh_generic; 245 nfsm_srvmtofh(fhp); 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 return (0); 295 } 296 nqsrv_getl(vp, ND_WRITE); 297 if (v3) { 298 error = preat_ret = VOP_GETATTR(vp, &preat, cred, procp); 299 if (!error && gcheck && 300 (preat.va_ctime.tv_sec != guard.tv_sec || 301 preat.va_ctime.tv_nsec != guard.tv_nsec)) 302 error = NFSERR_NOT_SYNC; 303 if (error) { 304 vput(vp); 305 nfsm_reply(NFSX_WCCDATA(v3)); 306 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 307 return (0); 308 } 309 } 310 311 /* 312 * If the size is being changed write acces is required, otherwise 313 * just check for a read only file system. 314 */ 315 if (va.va_size == ((u_quad_t)((quad_t) -1))) { 316 if (rdonly || (vp->v_mount->mnt_flag & MNT_RDONLY)) { 317 error = EROFS; 318 goto out; 319 } 320 } else { 321 if (vp->v_type == VDIR) { 322 error = EISDIR; 323 goto out; 324 } else if ((error = nfsrv_access(vp, VWRITE, cred, rdonly, 325 procp, 0)) != 0) 326 goto out; 327 } 328 error = VOP_SETATTR(vp, &va, cred, procp); 329 postat_ret = VOP_GETATTR(vp, &va, cred, procp); 330 if (!error) 331 error = postat_ret; 332 out: 333 vput(vp); 334 nfsm_reply(NFSX_WCCORFATTR(v3)); 335 if (v3) { 336 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 337 return (0); 338 } else { 339 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 340 nfsm_srvfillattr(&va, fp); 341 } 342 nfsm_srvdone; 343 } 344 345 /* 346 * nfs lookup rpc 347 */ 348 int 349 nfsrv_lookup(nfsd, slp, procp, mrq) 350 struct nfsrv_descript *nfsd; 351 struct nfssvc_sock *slp; 352 struct proc *procp; 353 struct mbuf **mrq; 354 { 355 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 356 struct mbuf *nam = nfsd->nd_nam; 357 caddr_t dpos = nfsd->nd_dpos; 358 struct ucred *cred = &nfsd->nd_cr; 359 struct nfs_fattr *fp; 360 struct nameidata nd, ind, *ndp = &nd; 361 struct vnode *vp, *dirp; 362 nfsfh_t nfh; 363 fhandle_t *fhp; 364 caddr_t cp; 365 u_int32_t *tl; 366 int32_t t1; 367 caddr_t bpos; 368 int error = 0, cache, dirattr_ret = 1; 369 uint32_t len; 370 int v3 = (nfsd->nd_flag & ND_NFSV3), pubflag; 371 char *cp2; 372 struct mbuf *mb, *mreq; 373 struct vattr va, dirattr; 374 u_quad_t frev; 375 376 fhp = &nfh.fh_generic; 377 nfsm_srvmtofh(fhp); 378 nfsm_srvnamesiz(len); 379 380 pubflag = nfs_ispublicfh(fhp); 381 382 nd.ni_cnd.cn_cred = cred; 383 nd.ni_cnd.cn_nameiop = LOOKUP; 384 nd.ni_cnd.cn_flags = LOCKLEAF | SAVESTART; 385 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 386 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), pubflag); 387 388 if (!error && pubflag) { 389 if (nd.ni_vp->v_type == VDIR && nfs_pub.np_index != NULL) { 390 /* 391 * Setup call to lookup() to see if we can find 392 * the index file. Arguably, this doesn't belong 393 * in a kernel.. Ugh. 394 */ 395 ind = nd; 396 VOP_UNLOCK(nd.ni_vp, 0); 397 ind.ni_pathlen = strlen(nfs_pub.np_index); 398 ind.ni_cnd.cn_nameptr = ind.ni_cnd.cn_pnbuf = 399 nfs_pub.np_index; 400 ind.ni_startdir = nd.ni_vp; 401 VREF(ind.ni_startdir); 402 error = lookup(&ind); 403 if (!error) { 404 /* 405 * Found an index file. Get rid of 406 * the old references. 407 */ 408 if (dirp) 409 vrele(dirp); 410 dirp = nd.ni_vp; 411 vrele(nd.ni_startdir); 412 ndp = &ind; 413 } else 414 error = 0; 415 } 416 /* 417 * If the public filehandle was used, check that this lookup 418 * didn't result in a filehandle outside the publicly exported 419 * filesystem. 420 */ 421 422 if (!error && ndp->ni_vp->v_mount != nfs_pub.np_mount) { 423 vput(nd.ni_vp); 424 error = EPERM; 425 } 426 } 427 428 if (dirp) { 429 if (v3) 430 dirattr_ret = VOP_GETATTR(dirp, &dirattr, cred, 431 procp); 432 vrele(dirp); 433 } 434 435 if (error) { 436 nfsm_reply(NFSX_POSTOPATTR(v3)); 437 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 438 return (0); 439 } 440 441 nqsrv_getl(ndp->ni_startdir, ND_READ); 442 vrele(ndp->ni_startdir); 443 PNBUF_PUT(nd.ni_cnd.cn_pnbuf); 444 vp = ndp->ni_vp; 445 memset((caddr_t)fhp, 0, sizeof(nfh)); 446 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; 447 error = VFS_VPTOFH(vp, &fhp->fh_fid); 448 if (!error) 449 error = VOP_GETATTR(vp, &va, cred, procp); 450 vput(vp); 451 nfsm_reply(NFSX_SRVFH(v3) + NFSX_POSTOPORFATTR(v3) + NFSX_POSTOPATTR(v3)); 452 if (error) { 453 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 454 return (0); 455 } 456 nfsm_srvfhtom(fhp, v3); 457 if (v3) { 458 nfsm_srvpostop_attr(0, &va); 459 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 460 } else { 461 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 462 nfsm_srvfillattr(&va, fp); 463 } 464 nfsm_srvdone; 465 } 466 467 /* 468 * nfs readlink service 469 */ 470 int 471 nfsrv_readlink(nfsd, slp, procp, mrq) 472 struct nfsrv_descript *nfsd; 473 struct nfssvc_sock *slp; 474 struct proc *procp; 475 struct mbuf **mrq; 476 { 477 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 478 struct mbuf *nam = nfsd->nd_nam; 479 caddr_t dpos = nfsd->nd_dpos; 480 struct ucred *cred = &nfsd->nd_cr; 481 struct iovec iv[(NFS_MAXPATHLEN+MLEN-1)/MLEN]; 482 struct iovec *ivp = iv; 483 struct mbuf *mp; 484 u_int32_t *tl; 485 int32_t t1; 486 caddr_t bpos; 487 int error = 0, rdonly, cache, i, padlen, getret; 488 uint32_t len; 489 int v3 = (nfsd->nd_flag & ND_NFSV3); 490 char *cp2; 491 struct mbuf *mb, *mp2 = NULL, *mp3 = NULL, *mreq; 492 struct vnode *vp; 493 struct vattr attr; 494 nfsfh_t nfh; 495 fhandle_t *fhp; 496 struct uio io, *uiop = &io; 497 u_quad_t frev; 498 499 fhp = &nfh.fh_generic; 500 nfsm_srvmtofh(fhp); 501 len = 0; 502 i = 0; 503 while (len < NFS_MAXPATHLEN) { 504 mp = m_get(M_WAIT, MT_DATA); 505 MCLAIM(mp, &nfs_mowner); 506 m_clget(mp, M_WAIT); 507 mp->m_len = NFSMSIZ(mp); 508 if (len == 0) 509 mp3 = mp2 = mp; 510 else { 511 mp2->m_next = mp; 512 mp2 = mp; 513 } 514 if ((len+mp->m_len) > NFS_MAXPATHLEN) { 515 mp->m_len = NFS_MAXPATHLEN-len; 516 len = NFS_MAXPATHLEN; 517 } else 518 len += mp->m_len; 519 ivp->iov_base = mtod(mp, caddr_t); 520 ivp->iov_len = mp->m_len; 521 i++; 522 ivp++; 523 } 524 uiop->uio_iov = iv; 525 uiop->uio_iovcnt = i; 526 uiop->uio_offset = 0; 527 uiop->uio_resid = len; 528 uiop->uio_rw = UIO_READ; 529 uiop->uio_segflg = UIO_SYSSPACE; 530 uiop->uio_procp = (struct proc *)0; 531 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 532 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 533 if (error) { 534 m_freem(mp3); 535 nfsm_reply(2 * NFSX_UNSIGNED); 536 nfsm_srvpostop_attr(1, (struct vattr *)0); 537 return (0); 538 } 539 if (vp->v_type != VLNK) { 540 if (v3) 541 error = EINVAL; 542 else 543 error = ENXIO; 544 goto out; 545 } 546 nqsrv_getl(vp, ND_READ); 547 error = VOP_READLINK(vp, uiop, cred); 548 out: 549 getret = VOP_GETATTR(vp, &attr, cred, procp); 550 vput(vp); 551 if (error) 552 m_freem(mp3); 553 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_UNSIGNED); 554 if (v3) { 555 nfsm_srvpostop_attr(getret, &attr); 556 if (error) 557 return (0); 558 } 559 len -= uiop->uio_resid; 560 padlen = nfsm_padlen(len); 561 if (uiop->uio_resid || padlen) 562 nfs_zeropad(mp3, uiop->uio_resid, padlen); 563 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 564 *tl = txdr_unsigned(len); 565 mb->m_next = mp3; 566 nfsm_srvdone; 567 } 568 569 /* 570 * XXX UBC temp limit 571 * maximum number of pages we can do VOP_GETPAGES and loan-out at once. 572 * should be <= MAX_READ_AHEAD in genfs_vnops.c 573 */ 574 #define NFSD_READ_GETPAGES_CHUNK 16 575 576 /* 577 * nfs read service 578 */ 579 int 580 nfsrv_read(nfsd, slp, procp, mrq) 581 struct nfsrv_descript *nfsd; 582 struct nfssvc_sock *slp; 583 struct proc *procp; 584 struct mbuf **mrq; 585 { 586 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 587 struct mbuf *nam = nfsd->nd_nam; 588 caddr_t dpos = nfsd->nd_dpos; 589 struct ucred *cred = &nfsd->nd_cr; 590 struct mbuf *m; 591 struct nfs_fattr *fp; 592 u_int32_t *tl; 593 int32_t t1; 594 int i; 595 caddr_t bpos; 596 int error = 0, rdonly, cache, getret; 597 int v3 = (nfsd->nd_flag & ND_NFSV3); 598 uint32_t reqlen, len, cnt, left; 599 int padlen; 600 char *cp2; 601 struct mbuf *mb, *mreq; 602 struct vnode *vp; 603 nfsfh_t nfh; 604 fhandle_t *fhp; 605 struct uio io, *uiop = &io; 606 struct vattr va; 607 off_t off; 608 u_quad_t frev; 609 610 fhp = &nfh.fh_generic; 611 nfsm_srvmtofh(fhp); 612 if (v3) { 613 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 614 off = fxdr_hyper(tl); 615 } else { 616 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 617 off = (off_t)fxdr_unsigned(u_int32_t, *tl); 618 } 619 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 620 reqlen = fxdr_unsigned(uint32_t, *tl); 621 reqlen = MIN(reqlen, NFS_SRVMAXDATA(nfsd)); 622 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 623 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 624 if (error) { 625 nfsm_reply(2 * NFSX_UNSIGNED); 626 nfsm_srvpostop_attr(1, (struct vattr *)0); 627 return (0); 628 } 629 if (vp->v_type != VREG) { 630 if (v3) 631 error = EINVAL; 632 else 633 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 634 } 635 if (!error) { 636 nqsrv_getl(vp, ND_READ); 637 if ((error = nfsrv_access(vp, VREAD, cred, rdonly, procp, 1)) != 0) 638 error = nfsrv_access(vp, VEXEC, cred, rdonly, procp, 1); 639 } 640 getret = VOP_GETATTR(vp, &va, cred, procp); 641 if (!error) 642 error = getret; 643 if (error) { 644 vput(vp); 645 nfsm_reply(NFSX_POSTOPATTR(v3)); 646 nfsm_srvpostop_attr(getret, &va); 647 return (0); 648 } 649 if (off >= va.va_size) 650 cnt = 0; 651 else if ((off + reqlen) > va.va_size) 652 cnt = va.va_size - off; 653 else 654 cnt = reqlen; 655 nfsm_reply(NFSX_POSTOPORFATTR(v3) + 3 * NFSX_UNSIGNED+nfsm_rndup(cnt)); 656 if (v3) { 657 nfsm_build(tl, u_int32_t *, NFSX_V3FATTR + 4 * NFSX_UNSIGNED); 658 *tl++ = nfs_true; 659 fp = (struct nfs_fattr *)tl; 660 tl += (NFSX_V3FATTR / sizeof (u_int32_t)); 661 } else { 662 nfsm_build(tl, u_int32_t *, NFSX_V2FATTR + NFSX_UNSIGNED); 663 fp = (struct nfs_fattr *)tl; 664 tl += (NFSX_V2FATTR / sizeof (u_int32_t)); 665 } 666 len = left = cnt; 667 if (cnt > 0) { 668 if (nfsd_use_loan) { 669 struct vm_page **pgpp; 670 voff_t pgoff = trunc_page(off); 671 int orignpages, nleftpages; 672 vaddr_t lva, curlva; 673 674 orignpages = (round_page(off + cnt) - pgoff) 675 >> PAGE_SHIFT; 676 KASSERT(orignpages <= M_EXT_MAXPAGES); /* XXX */ 677 678 lva = sokvaalloc(orignpages << PAGE_SHIFT, slp->ns_so); 679 if (lva == 0) { 680 /* fall back to VOP_READ */ 681 goto loan_fail; 682 } 683 684 m = m_get(M_WAIT, MT_DATA); 685 pgpp = m->m_ext.ext_pgs; 686 687 curlva = lva; 688 nleftpages = orignpages; 689 while (nleftpages > 0) { 690 int npages = nleftpages; 691 if (npages > NFSD_READ_GETPAGES_CHUNK) 692 npages = NFSD_READ_GETPAGES_CHUNK; 693 again: 694 simple_lock(&vp->v_interlock); 695 error = VOP_GETPAGES(vp, pgoff, pgpp, &npages, 696 0, VM_PROT_READ, 0, PGO_SYNCIO); 697 if (error == EAGAIN) { 698 tsleep(&lbolt, PVM, "nfsread", 0); 699 goto again; 700 } 701 if (error) { 702 uvm_unloan(m->m_ext.ext_pgs, 703 orignpages - nleftpages, 704 UVM_LOAN_TOPAGE); 705 sokvafree(lva, 706 orignpages << PAGE_SHIFT); 707 m_free(m); 708 goto read_error; 709 } 710 711 /* loan and unbusy pages */ 712 simple_lock(&vp->v_interlock); 713 for (i = 0; i < npages; i++) { 714 if (pgpp[i]->flags & PG_RELEASED) { 715 uvm_lock_pageq(); 716 uvm_page_unbusy(pgpp, npages); 717 uvm_unlock_pageq(); 718 simple_unlock(&vp->v_interlock); 719 continue; 720 } 721 } 722 uvm_loanuobjpages(pgpp, npages); 723 simple_unlock(&vp->v_interlock); 724 725 /* map pages */ 726 for (i = 0; i < npages; i++) { 727 pmap_kenter_pa(curlva, 728 VM_PAGE_TO_PHYS(pgpp[i]), 729 VM_PROT_READ); 730 curlva += PAGE_SIZE; 731 } 732 nleftpages -= npages; 733 pgpp += npages; 734 pgoff += npages << PAGE_SHIFT; 735 } 736 737 lva += off & PAGE_MASK; 738 739 MCLAIM(m, &nfs_mowner); 740 MEXTADD(m, (void *)lva, cnt, M_MBUF, soloanfree, 741 slp->ns_so); 742 m->m_flags |= M_EXT_PAGES | M_EXT_ROMAP; 743 m->m_len = cnt; 744 745 pmap_update(pmap_kernel()); 746 mb->m_next = m; 747 mb = m; 748 error = 0; 749 uiop->uio_resid = 0; 750 } else { 751 struct iovec *iv; 752 struct iovec *iv2; 753 struct mbuf *m2; 754 int siz; 755 loan_fail: 756 /* 757 * Generate the mbuf list with the uio_iov ref. to it. 758 */ 759 i = 0; 760 m = m2 = mb; 761 while (left > 0) { 762 siz = min(M_TRAILINGSPACE(m), left); 763 if (siz > 0) { 764 left -= siz; 765 i++; 766 } 767 if (left > 0) { 768 m = m_get(M_WAIT, MT_DATA); 769 MCLAIM(m, &nfs_mowner); 770 m_clget(m, M_WAIT); 771 m->m_len = 0; 772 m2->m_next = m; 773 m2 = m; 774 } 775 } 776 iv = malloc(i * sizeof(struct iovec), M_TEMP, M_WAITOK); 777 uiop->uio_iov = iv2 = iv; 778 m = mb; 779 left = cnt; 780 i = 0; 781 while (left > 0) { 782 if (m == NULL) 783 panic("nfsrv_read iov"); 784 siz = min(M_TRAILINGSPACE(m), left); 785 if (siz > 0) { 786 iv->iov_base = mtod(m, caddr_t) + 787 m->m_len; 788 iv->iov_len = siz; 789 m->m_len += siz; 790 left -= siz; 791 iv++; 792 i++; 793 } 794 m = m->m_next; 795 } 796 uiop->uio_iovcnt = i; 797 uiop->uio_offset = off; 798 uiop->uio_resid = cnt; 799 uiop->uio_rw = UIO_READ; 800 uiop->uio_segflg = UIO_SYSSPACE; 801 error = VOP_READ(vp, uiop, IO_NODELOCKED, cred); 802 off = uiop->uio_offset; 803 free((caddr_t)iv2, M_TEMP); 804 } 805 read_error: 806 if (error || (getret = VOP_GETATTR(vp, &va, cred, procp)) != 0){ 807 if (!error) 808 error = getret; 809 m_freem(mreq); 810 vput(vp); 811 nfsm_reply(NFSX_POSTOPATTR(v3)); 812 nfsm_srvpostop_attr(getret, &va); 813 return (0); 814 } 815 } else { 816 uiop->uio_resid = 0; 817 } 818 vput(vp); 819 nfsm_srvfillattr(&va, fp); 820 len -= uiop->uio_resid; 821 padlen = nfsm_padlen(len); 822 if (uiop->uio_resid || padlen) 823 nfs_zeropad(mb, uiop->uio_resid, padlen); 824 if (v3) { 825 *tl++ = txdr_unsigned(len); 826 if (len < reqlen) 827 *tl++ = nfs_true; 828 else 829 *tl++ = nfs_false; 830 } 831 *tl = txdr_unsigned(len); 832 nfsm_srvdone; 833 } 834 835 /* 836 * nfs write service 837 */ 838 int 839 nfsrv_write(nfsd, slp, procp, mrq) 840 struct nfsrv_descript *nfsd; 841 struct nfssvc_sock *slp; 842 struct proc *procp; 843 struct mbuf **mrq; 844 { 845 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 846 struct mbuf *nam = nfsd->nd_nam; 847 caddr_t dpos = nfsd->nd_dpos; 848 struct ucred *cred = &nfsd->nd_cr; 849 struct iovec *ivp; 850 int i, cnt; 851 struct mbuf *mp; 852 struct nfs_fattr *fp; 853 struct iovec *iv; 854 struct vattr va, forat; 855 u_int32_t *tl; 856 int32_t t1; 857 caddr_t bpos; 858 int error = 0, rdonly, cache, len, forat_ret = 1; 859 int ioflags, aftat_ret = 1, retlen, zeroing, adjust; 860 int stable = NFSV3WRITE_FILESYNC; 861 int v3 = (nfsd->nd_flag & ND_NFSV3); 862 char *cp2; 863 struct mbuf *mb, *mreq; 864 struct vnode *vp; 865 nfsfh_t nfh; 866 fhandle_t *fhp; 867 struct uio io, *uiop = &io; 868 off_t off; 869 u_quad_t frev; 870 871 if (mrep == NULL) { 872 *mrq = NULL; 873 return (0); 874 } 875 fhp = &nfh.fh_generic; 876 nfsm_srvmtofh(fhp); 877 if (v3) { 878 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 879 off = fxdr_hyper(tl); 880 tl += 3; 881 stable = fxdr_unsigned(int, *tl++); 882 } else { 883 nfsm_dissect(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 884 off = (off_t)fxdr_unsigned(u_int32_t, *++tl); 885 tl += 2; 886 } 887 retlen = len = fxdr_unsigned(int32_t, *tl); 888 cnt = i = 0; 889 890 /* 891 * For NFS Version 2, it is not obvious what a write of zero length 892 * should do, but I might as well be consistent with Version 3, 893 * which is to return ok so long as there are no permission problems. 894 */ 895 if (len > 0) { 896 zeroing = 1; 897 mp = mrep; 898 while (mp) { 899 if (mp == md) { 900 zeroing = 0; 901 adjust = dpos - mtod(mp, caddr_t); 902 mp->m_len -= adjust; 903 if (mp->m_len > 0 && adjust > 0) 904 NFSMADV(mp, adjust); 905 } 906 if (zeroing) 907 mp->m_len = 0; 908 else if (mp->m_len > 0) { 909 i += mp->m_len; 910 if (i > len) { 911 mp->m_len -= (i - len); 912 zeroing = 1; 913 } 914 if (mp->m_len > 0) 915 cnt++; 916 } 917 mp = mp->m_next; 918 } 919 } 920 if (len > NFS_MAXDATA || len < 0 || i < len) { 921 error = EIO; 922 nfsm_reply(2 * NFSX_UNSIGNED); 923 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 924 return (0); 925 } 926 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 927 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 928 if (error) { 929 nfsm_reply(2 * NFSX_UNSIGNED); 930 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 931 return (0); 932 } 933 if (v3) 934 forat_ret = VOP_GETATTR(vp, &forat, cred, procp); 935 if (vp->v_type != VREG) { 936 if (v3) 937 error = EINVAL; 938 else 939 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 940 } 941 if (!error) { 942 nqsrv_getl(vp, ND_WRITE); 943 error = nfsrv_access(vp, VWRITE, cred, rdonly, procp, 1); 944 } 945 if (error) { 946 vput(vp); 947 nfsm_reply(NFSX_WCCDATA(v3)); 948 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 949 return (0); 950 } 951 952 if (len > 0) { 953 ivp = malloc(cnt * sizeof (struct iovec), M_TEMP, M_WAITOK); 954 uiop->uio_iov = iv = ivp; 955 uiop->uio_iovcnt = cnt; 956 mp = mrep; 957 while (mp) { 958 if (mp->m_len > 0) { 959 ivp->iov_base = mtod(mp, caddr_t); 960 ivp->iov_len = mp->m_len; 961 ivp++; 962 } 963 mp = mp->m_next; 964 } 965 966 /* 967 * XXX 968 * The IO_METASYNC flag indicates that all metadata (and not 969 * just enough to ensure data integrity) must be written to 970 * stable storage synchronously. 971 * (IO_METASYNC is not yet implemented in 4.4BSD-Lite.) 972 */ 973 if (stable == NFSV3WRITE_UNSTABLE) 974 ioflags = IO_NODELOCKED; 975 else if (stable == NFSV3WRITE_DATASYNC) 976 ioflags = (IO_SYNC | IO_NODELOCKED); 977 else 978 ioflags = (IO_METASYNC | IO_SYNC | IO_NODELOCKED); 979 uiop->uio_resid = len; 980 uiop->uio_rw = UIO_WRITE; 981 uiop->uio_segflg = UIO_SYSSPACE; 982 uiop->uio_procp = (struct proc *)0; 983 uiop->uio_offset = off; 984 error = VOP_WRITE(vp, uiop, ioflags, cred); 985 nfsstats.srvvop_writes++; 986 free(iv, M_TEMP); 987 } 988 aftat_ret = VOP_GETATTR(vp, &va, cred, procp); 989 vput(vp); 990 if (!error) 991 error = aftat_ret; 992 nfsm_reply(NFSX_PREOPATTR(v3) + NFSX_POSTOPORFATTR(v3) + 993 2 * NFSX_UNSIGNED + NFSX_WRITEVERF(v3)); 994 if (v3) { 995 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 996 if (error) 997 return (0); 998 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 999 *tl++ = txdr_unsigned(retlen); 1000 if (stable == NFSV3WRITE_UNSTABLE) 1001 *tl++ = txdr_unsigned(stable); 1002 else 1003 *tl++ = txdr_unsigned(NFSV3WRITE_FILESYNC); 1004 /* 1005 * Actually, there is no need to txdr these fields, 1006 * but it may make the values more human readable, 1007 * for debugging purposes. 1008 */ 1009 *tl++ = txdr_unsigned(boottime.tv_sec); 1010 *tl = txdr_unsigned(boottime.tv_usec); 1011 } else { 1012 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 1013 nfsm_srvfillattr(&va, fp); 1014 } 1015 nfsm_srvdone; 1016 } 1017 1018 /* 1019 * NFS write service with write gathering support. Called when 1020 * nfsrvw_procrastinate > 0. 1021 * See: Chet Juszczak, "Improving the Write Performance of an NFS Server", 1022 * in Proc. of the Winter 1994 Usenix Conference, pg. 247-259, San Franscisco, 1023 * Jan. 1994. 1024 */ 1025 int 1026 nfsrv_writegather(ndp, slp, procp, mrq) 1027 struct nfsrv_descript **ndp; 1028 struct nfssvc_sock *slp; 1029 struct proc *procp; 1030 struct mbuf **mrq; 1031 { 1032 struct iovec *ivp; 1033 struct mbuf *mp; 1034 struct nfsrv_descript *wp, *nfsd, *owp, *swp; 1035 struct nfs_fattr *fp; 1036 int i = 0; 1037 struct iovec *iov; 1038 struct nfsrvw_delayhash *wpp; 1039 struct ucred *cred; 1040 struct vattr va, forat; 1041 u_int32_t *tl; 1042 int32_t t1; 1043 caddr_t bpos, dpos; 1044 int error = 0, rdonly, cache, len = 0, forat_ret = 1; 1045 int ioflags, aftat_ret = 1, s, adjust, v3, zeroing; 1046 char *cp2; 1047 struct mbuf *mb, *mreq, *mrep, *md; 1048 struct vnode *vp; 1049 struct uio io, *uiop = &io; 1050 u_quad_t frev, cur_usec; 1051 1052 *mrq = NULL; 1053 if (*ndp) { 1054 nfsd = *ndp; 1055 *ndp = NULL; 1056 mrep = nfsd->nd_mrep; 1057 md = nfsd->nd_md; 1058 dpos = nfsd->nd_dpos; 1059 cred = &nfsd->nd_cr; 1060 v3 = (nfsd->nd_flag & ND_NFSV3); 1061 LIST_INIT(&nfsd->nd_coalesce); 1062 nfsd->nd_mreq = NULL; 1063 nfsd->nd_stable = NFSV3WRITE_FILESYNC; 1064 cur_usec = (u_quad_t)time.tv_sec * 1000000 + (u_quad_t)time.tv_usec; 1065 nfsd->nd_time = cur_usec + nfsrvw_procrastinate; 1066 1067 /* 1068 * Now, get the write header.. 1069 */ 1070 nfsm_srvmtofh(&nfsd->nd_fh); 1071 if (v3) { 1072 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 1073 nfsd->nd_off = fxdr_hyper(tl); 1074 tl += 3; 1075 nfsd->nd_stable = fxdr_unsigned(int, *tl++); 1076 } else { 1077 nfsm_dissect(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1078 nfsd->nd_off = (off_t)fxdr_unsigned(u_int32_t, *++tl); 1079 tl += 2; 1080 } 1081 len = fxdr_unsigned(int32_t, *tl); 1082 nfsd->nd_len = len; 1083 nfsd->nd_eoff = nfsd->nd_off + len; 1084 1085 /* 1086 * Trim the header out of the mbuf list and trim off any trailing 1087 * junk so that the mbuf list has only the write data. 1088 */ 1089 zeroing = 1; 1090 i = 0; 1091 mp = mrep; 1092 while (mp) { 1093 if (mp == md) { 1094 zeroing = 0; 1095 adjust = dpos - mtod(mp, caddr_t); 1096 mp->m_len -= adjust; 1097 if (mp->m_len > 0 && adjust > 0) 1098 NFSMADV(mp, adjust); 1099 } 1100 if (zeroing) 1101 mp->m_len = 0; 1102 else { 1103 i += mp->m_len; 1104 if (i > len) { 1105 mp->m_len -= (i - len); 1106 zeroing = 1; 1107 } 1108 } 1109 mp = mp->m_next; 1110 } 1111 if (len > NFS_MAXDATA || len < 0 || i < len) { 1112 nfsmout: 1113 m_freem(mrep); 1114 error = EIO; 1115 nfsm_writereply(2 * NFSX_UNSIGNED, v3); 1116 if (v3) 1117 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1118 nfsd->nd_mreq = mreq; 1119 nfsd->nd_mrep = NULL; 1120 nfsd->nd_time = 0; 1121 } 1122 1123 /* 1124 * Add this entry to the hash and time queues. 1125 */ 1126 s = splsoftclock(); 1127 owp = NULL; 1128 wp = LIST_FIRST(&slp->ns_tq); 1129 while (wp && wp->nd_time < nfsd->nd_time) { 1130 owp = wp; 1131 wp = LIST_NEXT(wp, nd_tq); 1132 } 1133 if (owp) { 1134 LIST_INSERT_AFTER(owp, nfsd, nd_tq); 1135 } else { 1136 LIST_INSERT_HEAD(&slp->ns_tq, nfsd, nd_tq); 1137 } 1138 if (nfsd->nd_mrep) { 1139 wpp = NWDELAYHASH(slp, nfsd->nd_fh.fh_fid.fid_data); 1140 owp = NULL; 1141 wp = LIST_FIRST(wpp); 1142 while (wp && 1143 memcmp((caddr_t)&nfsd->nd_fh, (caddr_t)&wp->nd_fh, NFSX_V3FH)) { 1144 owp = wp; 1145 wp = LIST_NEXT(wp, nd_hash); 1146 } 1147 while (wp && wp->nd_off < nfsd->nd_off && 1148 !memcmp((caddr_t)&nfsd->nd_fh, (caddr_t)&wp->nd_fh, NFSX_V3FH)) { 1149 owp = wp; 1150 wp = LIST_NEXT(wp, nd_hash); 1151 } 1152 if (owp) { 1153 LIST_INSERT_AFTER(owp, nfsd, nd_hash); 1154 1155 /* 1156 * Search the hash list for overlapping entries and 1157 * coalesce. 1158 */ 1159 for(; nfsd && NFSW_CONTIG(owp, nfsd); nfsd = wp) { 1160 wp = LIST_NEXT(nfsd, nd_hash); 1161 if (NFSW_SAMECRED(owp, nfsd)) 1162 nfsrvw_coalesce(owp, nfsd); 1163 } 1164 } else { 1165 LIST_INSERT_HEAD(wpp, nfsd, nd_hash); 1166 } 1167 } 1168 splx(s); 1169 } 1170 1171 /* 1172 * Now, do VOP_WRITE()s for any one(s) that need to be done now 1173 * and generate the associated reply mbuf list(s). 1174 */ 1175 loop1: 1176 cur_usec = (u_quad_t)time.tv_sec * 1000000 + (u_quad_t)time.tv_usec; 1177 s = splsoftclock(); 1178 for (nfsd = LIST_FIRST(&slp->ns_tq); nfsd; nfsd = owp) { 1179 owp = LIST_NEXT(nfsd, nd_tq); 1180 if (nfsd->nd_time > cur_usec) 1181 break; 1182 if (nfsd->nd_mreq) 1183 continue; 1184 LIST_REMOVE(nfsd, nd_tq); 1185 LIST_REMOVE(nfsd, nd_hash); 1186 splx(s); 1187 mrep = nfsd->nd_mrep; 1188 nfsd->nd_mrep = NULL; 1189 cred = &nfsd->nd_cr; 1190 v3 = (nfsd->nd_flag & ND_NFSV3); 1191 forat_ret = aftat_ret = 1; 1192 error = nfsrv_fhtovp(&nfsd->nd_fh, 1, &vp, cred, slp, 1193 nfsd->nd_nam, &rdonly, (nfsd->nd_flag & ND_KERBAUTH), 1194 FALSE); 1195 if (!error) { 1196 if (v3) 1197 forat_ret = VOP_GETATTR(vp, &forat, cred, procp); 1198 if (vp->v_type != VREG) { 1199 if (v3) 1200 error = EINVAL; 1201 else 1202 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 1203 } 1204 } else 1205 vp = NULL; 1206 if (!error) { 1207 nqsrv_getl(vp, ND_WRITE); 1208 error = nfsrv_access(vp, VWRITE, cred, rdonly, procp, 1); 1209 } 1210 1211 if (nfsd->nd_stable == NFSV3WRITE_UNSTABLE) 1212 ioflags = IO_NODELOCKED; 1213 else if (nfsd->nd_stable == NFSV3WRITE_DATASYNC) 1214 ioflags = (IO_SYNC | IO_NODELOCKED); 1215 else 1216 ioflags = (IO_METASYNC | IO_SYNC | IO_NODELOCKED); 1217 uiop->uio_rw = UIO_WRITE; 1218 uiop->uio_segflg = UIO_SYSSPACE; 1219 uiop->uio_procp = (struct proc *)0; 1220 uiop->uio_offset = nfsd->nd_off; 1221 uiop->uio_resid = nfsd->nd_eoff - nfsd->nd_off; 1222 if (uiop->uio_resid > 0) { 1223 mp = mrep; 1224 i = 0; 1225 while (mp) { 1226 if (mp->m_len > 0) 1227 i++; 1228 mp = mp->m_next; 1229 } 1230 uiop->uio_iovcnt = i; 1231 iov = malloc(i * sizeof (struct iovec), M_TEMP, M_WAITOK); 1232 uiop->uio_iov = ivp = iov; 1233 mp = mrep; 1234 while (mp) { 1235 if (mp->m_len > 0) { 1236 ivp->iov_base = mtod(mp, caddr_t); 1237 ivp->iov_len = mp->m_len; 1238 ivp++; 1239 } 1240 mp = mp->m_next; 1241 } 1242 if (!error) { 1243 error = VOP_WRITE(vp, uiop, ioflags, cred); 1244 nfsstats.srvvop_writes++; 1245 } 1246 free((caddr_t)iov, M_TEMP); 1247 } 1248 m_freem(mrep); 1249 if (vp) { 1250 aftat_ret = VOP_GETATTR(vp, &va, cred, procp); 1251 vput(vp); 1252 } 1253 1254 /* 1255 * Loop around generating replies for all write rpcs that have 1256 * now been completed. 1257 */ 1258 swp = nfsd; 1259 do { 1260 if (error) { 1261 nfsm_writereply(NFSX_WCCDATA(v3), v3); 1262 if (v3) { 1263 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1264 } 1265 } else { 1266 nfsm_writereply(NFSX_PREOPATTR(v3) + 1267 NFSX_POSTOPORFATTR(v3) + 2 * NFSX_UNSIGNED + 1268 NFSX_WRITEVERF(v3), v3); 1269 if (v3) { 1270 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1271 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1272 *tl++ = txdr_unsigned(nfsd->nd_len); 1273 *tl++ = txdr_unsigned(swp->nd_stable); 1274 /* 1275 * Actually, there is no need to txdr these fields, 1276 * but it may make the values more human readable, 1277 * for debugging purposes. 1278 */ 1279 *tl++ = txdr_unsigned(boottime.tv_sec); 1280 *tl = txdr_unsigned(boottime.tv_usec); 1281 } else { 1282 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 1283 nfsm_srvfillattr(&va, fp); 1284 } 1285 } 1286 nfsd->nd_mreq = mreq; 1287 if (nfsd->nd_mrep) 1288 panic("nfsrv_write: nd_mrep not free"); 1289 1290 /* 1291 * Done. Put it at the head of the timer queue so that 1292 * the final phase can return the reply. 1293 */ 1294 s = splsoftclock(); 1295 if (nfsd != swp) { 1296 nfsd->nd_time = 0; 1297 LIST_INSERT_HEAD(&slp->ns_tq, nfsd, nd_tq); 1298 } 1299 nfsd = LIST_FIRST(&swp->nd_coalesce); 1300 if (nfsd) { 1301 LIST_REMOVE(nfsd, nd_tq); 1302 } 1303 splx(s); 1304 } while (nfsd); 1305 s = splsoftclock(); 1306 swp->nd_time = 0; 1307 LIST_INSERT_HEAD(&slp->ns_tq, swp, nd_tq); 1308 splx(s); 1309 goto loop1; 1310 } 1311 splx(s); 1312 1313 /* 1314 * Search for a reply to return. 1315 */ 1316 s = splsoftclock(); 1317 LIST_FOREACH(nfsd, &slp->ns_tq, nd_tq) { 1318 if (nfsd->nd_mreq) { 1319 LIST_REMOVE(nfsd, nd_tq); 1320 *mrq = nfsd->nd_mreq; 1321 *ndp = nfsd; 1322 break; 1323 } 1324 } 1325 splx(s); 1326 return (0); 1327 } 1328 1329 /* 1330 * Coalesce the write request nfsd into owp. To do this we must: 1331 * - remove nfsd from the queues 1332 * - merge nfsd->nd_mrep into owp->nd_mrep 1333 * - update the nd_eoff and nd_stable for owp 1334 * - put nfsd on owp's nd_coalesce list 1335 * NB: Must be called at splsoftclock(). 1336 */ 1337 void 1338 nfsrvw_coalesce(owp, nfsd) 1339 struct nfsrv_descript *owp; 1340 struct nfsrv_descript *nfsd; 1341 { 1342 int overlap; 1343 struct mbuf *mp; 1344 struct nfsrv_descript *m; 1345 1346 LIST_REMOVE(nfsd, nd_hash); 1347 LIST_REMOVE(nfsd, nd_tq); 1348 if (owp->nd_eoff < nfsd->nd_eoff) { 1349 overlap = owp->nd_eoff - nfsd->nd_off; 1350 if (overlap < 0) 1351 panic("nfsrv_coalesce: bad off"); 1352 if (overlap > 0) 1353 m_adj(nfsd->nd_mrep, overlap); 1354 mp = owp->nd_mrep; 1355 while (mp->m_next) 1356 mp = mp->m_next; 1357 mp->m_next = nfsd->nd_mrep; 1358 owp->nd_eoff = nfsd->nd_eoff; 1359 } else 1360 m_freem(nfsd->nd_mrep); 1361 nfsd->nd_mrep = NULL; 1362 if (nfsd->nd_stable == NFSV3WRITE_FILESYNC) 1363 owp->nd_stable = NFSV3WRITE_FILESYNC; 1364 else if (nfsd->nd_stable == NFSV3WRITE_DATASYNC && 1365 owp->nd_stable == NFSV3WRITE_UNSTABLE) 1366 owp->nd_stable = NFSV3WRITE_DATASYNC; 1367 LIST_INSERT_HEAD(&owp->nd_coalesce, nfsd, nd_tq); 1368 /* 1369 * nfsd might hold coalesce elements! Move them to owp. 1370 * Otherwise, requests may be lost and clients will be stuck. 1371 */ 1372 while ((m = LIST_FIRST(&nfsd->nd_coalesce)) != NULL) { 1373 LIST_REMOVE(m, nd_tq); 1374 LIST_INSERT_HEAD(&owp->nd_coalesce, m, nd_tq); 1375 } 1376 } 1377 1378 /* 1379 * nfs create service 1380 * now does a truncate to 0 length via. setattr if it already exists 1381 */ 1382 int 1383 nfsrv_create(nfsd, slp, procp, mrq) 1384 struct nfsrv_descript *nfsd; 1385 struct nfssvc_sock *slp; 1386 struct proc *procp; 1387 struct mbuf **mrq; 1388 { 1389 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1390 struct mbuf *nam = nfsd->nd_nam; 1391 caddr_t dpos = nfsd->nd_dpos; 1392 struct ucred *cred = &nfsd->nd_cr; 1393 struct nfs_fattr *fp; 1394 struct vattr va, dirfor, diraft; 1395 struct nfsv2_sattr *sp; 1396 u_int32_t *tl; 1397 struct nameidata nd; 1398 caddr_t cp; 1399 int32_t t1; 1400 caddr_t bpos; 1401 int error = 0, cache, len, tsize, dirfor_ret = 1, diraft_ret = 1; 1402 int rdev = 0; 1403 int v3 = (nfsd->nd_flag & ND_NFSV3), how, exclusive_flag = 0; 1404 char *cp2; 1405 struct mbuf *mb, *mreq; 1406 struct vnode *vp = NULL, *dirp = NULL; 1407 nfsfh_t nfh; 1408 fhandle_t *fhp; 1409 u_quad_t frev, tempsize; 1410 u_char cverf[NFSX_V3CREATEVERF]; 1411 1412 nd.ni_cnd.cn_nameiop = 0; 1413 fhp = &nfh.fh_generic; 1414 nfsm_srvmtofh(fhp); 1415 nfsm_srvnamesiz(len); 1416 nd.ni_cnd.cn_cred = cred; 1417 nd.ni_cnd.cn_nameiop = CREATE; 1418 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 1419 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 1420 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1421 if (dirp) { 1422 if (v3) 1423 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 1424 procp); 1425 else { 1426 vrele(dirp); 1427 dirp = (struct vnode *)0; 1428 } 1429 } 1430 if (error) { 1431 nfsm_reply(NFSX_WCCDATA(v3)); 1432 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1433 if (dirp) 1434 vrele(dirp); 1435 return (0); 1436 } 1437 VATTR_NULL(&va); 1438 if (v3) { 1439 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1440 how = fxdr_unsigned(int, *tl); 1441 switch (how) { 1442 case NFSV3CREATE_GUARDED: 1443 if (nd.ni_vp) { 1444 error = EEXIST; 1445 break; 1446 } 1447 case NFSV3CREATE_UNCHECKED: 1448 nfsm_srvsattr(&va); 1449 break; 1450 case NFSV3CREATE_EXCLUSIVE: 1451 nfsm_dissect(cp, caddr_t, NFSX_V3CREATEVERF); 1452 memcpy(cverf, cp, NFSX_V3CREATEVERF); 1453 exclusive_flag = 1; 1454 if (nd.ni_vp == NULL) 1455 va.va_mode = 0; 1456 break; 1457 }; 1458 va.va_type = VREG; 1459 } else { 1460 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1461 va.va_type = IFTOVT(fxdr_unsigned(u_int32_t, sp->sa_mode)); 1462 if (va.va_type == VNON) 1463 va.va_type = VREG; 1464 va.va_mode = nfstov_mode(sp->sa_mode); 1465 switch (va.va_type) { 1466 case VREG: 1467 tsize = fxdr_unsigned(int32_t, sp->sa_size); 1468 if (tsize != -1) 1469 va.va_size = (u_quad_t)tsize; 1470 break; 1471 case VCHR: 1472 case VBLK: 1473 case VFIFO: 1474 rdev = fxdr_unsigned(int32_t, sp->sa_size); 1475 break; 1476 default: 1477 break; 1478 }; 1479 } 1480 1481 /* 1482 * Iff doesn't exist, create it 1483 * otherwise just truncate to 0 length 1484 * should I set the mode too ?? 1485 */ 1486 if (nd.ni_vp == NULL) { 1487 if (va.va_type == VREG || va.va_type == VSOCK) { 1488 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1489 error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1490 if (!error) { 1491 if (exclusive_flag) { 1492 exclusive_flag = 0; 1493 VATTR_NULL(&va); 1494 memcpy((caddr_t)&va.va_atime, cverf, 1495 NFSX_V3CREATEVERF); 1496 error = VOP_SETATTR(nd.ni_vp, &va, cred, 1497 procp); 1498 } 1499 } 1500 } else if (va.va_type == VCHR || va.va_type == VBLK || 1501 va.va_type == VFIFO) { 1502 if (va.va_type == VCHR && rdev == 0xffffffff) 1503 va.va_type = VFIFO; 1504 if (va.va_type != VFIFO && 1505 (error = suser(cred, (u_short *)0))) { 1506 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1507 vput(nd.ni_dvp); 1508 nfsm_reply(0); 1509 return (error); 1510 } else 1511 va.va_rdev = (dev_t)rdev; 1512 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1513 error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, 1514 &va); 1515 if (error) { 1516 nfsm_reply(0); 1517 } 1518 if (nd.ni_cnd.cn_flags & ISSYMLINK) { 1519 vrele(nd.ni_dvp); 1520 vput(nd.ni_vp); 1521 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1522 error = EINVAL; 1523 nfsm_reply(0); 1524 } 1525 } else { 1526 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1527 vput(nd.ni_dvp); 1528 error = ENXIO; 1529 } 1530 vp = nd.ni_vp; 1531 } else { 1532 vp = nd.ni_vp; 1533 if (nd.ni_dvp == vp) 1534 vrele(nd.ni_dvp); 1535 else 1536 vput(nd.ni_dvp); 1537 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1538 if (!error && va.va_size != -1) { 1539 error = nfsrv_access(vp, VWRITE, cred, 1540 (nd.ni_cnd.cn_flags & RDONLY), procp, 0); 1541 if (!error) { 1542 nqsrv_getl(vp, ND_WRITE); 1543 tempsize = va.va_size; 1544 VATTR_NULL(&va); 1545 va.va_size = tempsize; 1546 error = VOP_SETATTR(vp, &va, cred, 1547 procp); 1548 } 1549 } 1550 if (error) 1551 vput(vp); 1552 } 1553 if (!error) { 1554 memset((caddr_t)fhp, 0, sizeof(nfh)); 1555 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; 1556 error = VFS_VPTOFH(vp, &fhp->fh_fid); 1557 if (!error) 1558 error = VOP_GETATTR(vp, &va, cred, procp); 1559 vput(vp); 1560 } 1561 if (v3) { 1562 if (exclusive_flag && !error && 1563 memcmp(cverf, (caddr_t)&va.va_atime, NFSX_V3CREATEVERF)) 1564 error = EEXIST; 1565 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 1566 vrele(dirp); 1567 } 1568 nfsm_reply(NFSX_SRVFH(v3) + NFSX_FATTR(v3) + NFSX_WCCDATA(v3)); 1569 if (v3) { 1570 if (!error) { 1571 nfsm_srvpostop_fh(fhp); 1572 nfsm_srvpostop_attr(0, &va); 1573 } 1574 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1575 } else { 1576 nfsm_srvfhtom(fhp, v3); 1577 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 1578 nfsm_srvfillattr(&va, fp); 1579 } 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 return (error); 1592 } 1593 1594 /* 1595 * nfs v3 mknod service 1596 */ 1597 int 1598 nfsrv_mknod(nfsd, slp, procp, mrq) 1599 struct nfsrv_descript *nfsd; 1600 struct nfssvc_sock *slp; 1601 struct proc *procp; 1602 struct mbuf **mrq; 1603 { 1604 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1605 struct mbuf *nam = nfsd->nd_nam; 1606 caddr_t dpos = nfsd->nd_dpos; 1607 struct ucred *cred = &nfsd->nd_cr; 1608 struct vattr va, dirfor, diraft; 1609 u_int32_t *tl; 1610 struct nameidata nd; 1611 int32_t t1; 1612 caddr_t bpos; 1613 int error = 0, cache, len, dirfor_ret = 1, diraft_ret = 1; 1614 u_int32_t major, minor; 1615 enum vtype vtyp; 1616 char *cp2; 1617 struct mbuf *mb, *mreq; 1618 struct vnode *vp, *dirp = (struct vnode *)0; 1619 nfsfh_t nfh; 1620 fhandle_t *fhp; 1621 u_quad_t frev; 1622 1623 nd.ni_cnd.cn_nameiop = 0; 1624 fhp = &nfh.fh_generic; 1625 nfsm_srvmtofh(fhp); 1626 nfsm_srvnamesiz(len); 1627 nd.ni_cnd.cn_cred = cred; 1628 nd.ni_cnd.cn_nameiop = CREATE; 1629 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 1630 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 1631 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1632 if (dirp) 1633 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, procp); 1634 if (error) { 1635 nfsm_reply(NFSX_WCCDATA(1)); 1636 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1637 if (dirp) 1638 vrele(dirp); 1639 return (0); 1640 } 1641 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1642 vtyp = nfsv3tov_type(*tl); 1643 if (vtyp != VCHR && vtyp != VBLK && vtyp != VSOCK && vtyp != VFIFO) { 1644 error = NFSERR_BADTYPE; 1645 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1646 if (nd.ni_dvp == nd.ni_vp) 1647 vrele(nd.ni_dvp); 1648 else 1649 vput(nd.ni_dvp); 1650 if (nd.ni_vp) 1651 vput(nd.ni_vp); 1652 goto out; 1653 } 1654 VATTR_NULL(&va); 1655 nfsm_srvsattr(&va); 1656 if (vtyp == VCHR || vtyp == VBLK) { 1657 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1658 major = fxdr_unsigned(u_int32_t, *tl++); 1659 minor = fxdr_unsigned(u_int32_t, *tl); 1660 va.va_rdev = makedev(major, minor); 1661 } 1662 1663 /* 1664 * Iff doesn't exist, create it. 1665 */ 1666 if (nd.ni_vp) { 1667 error = EEXIST; 1668 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1669 if (nd.ni_dvp == nd.ni_vp) 1670 vrele(nd.ni_dvp); 1671 else 1672 vput(nd.ni_dvp); 1673 vput(nd.ni_vp); 1674 goto out; 1675 } 1676 va.va_type = vtyp; 1677 if (vtyp == VSOCK) { 1678 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1679 error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1680 } else { 1681 if (va.va_type != VFIFO && 1682 (error = suser(cred, (u_short *)0))) { 1683 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1684 vput(nd.ni_dvp); 1685 goto out; 1686 } 1687 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1688 error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1689 if (error) { 1690 goto out; 1691 } 1692 if (error) 1693 goto out; 1694 if (nd.ni_cnd.cn_flags & ISSYMLINK) { 1695 vput(nd.ni_vp); 1696 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1697 error = EINVAL; 1698 } 1699 } 1700 out: 1701 vp = nd.ni_vp; 1702 if (!error) { 1703 memset((caddr_t)fhp, 0, sizeof(nfh)); 1704 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; 1705 error = VFS_VPTOFH(vp, &fhp->fh_fid); 1706 if (!error) 1707 error = VOP_GETATTR(vp, &va, cred, procp); 1708 vput(vp); 1709 } 1710 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 1711 vrele(dirp); 1712 nfsm_reply(NFSX_SRVFH(1) + NFSX_POSTOPATTR(1) + NFSX_WCCDATA(1)); 1713 if (!error) { 1714 nfsm_srvpostop_fh(fhp); 1715 nfsm_srvpostop_attr(0, &va); 1716 } 1717 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1718 return (0); 1719 nfsmout: 1720 if (dirp) 1721 vrele(dirp); 1722 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1723 if (nd.ni_dvp == nd.ni_vp) 1724 vrele(nd.ni_dvp); 1725 else 1726 vput(nd.ni_dvp); 1727 if (nd.ni_vp) 1728 vput(nd.ni_vp); 1729 return (error); 1730 } 1731 1732 /* 1733 * nfs remove service 1734 */ 1735 int 1736 nfsrv_remove(nfsd, slp, procp, mrq) 1737 struct nfsrv_descript *nfsd; 1738 struct nfssvc_sock *slp; 1739 struct proc *procp; 1740 struct mbuf **mrq; 1741 { 1742 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1743 struct mbuf *nam = nfsd->nd_nam; 1744 caddr_t dpos = nfsd->nd_dpos; 1745 struct ucred *cred = &nfsd->nd_cr; 1746 struct nameidata nd; 1747 u_int32_t *tl; 1748 int32_t t1; 1749 caddr_t bpos; 1750 int error = 0, cache, len, dirfor_ret = 1, diraft_ret = 1; 1751 int v3 = (nfsd->nd_flag & ND_NFSV3); 1752 char *cp2; 1753 struct mbuf *mb, *mreq; 1754 struct vnode *vp, *dirp; 1755 struct vattr dirfor, diraft; 1756 nfsfh_t nfh; 1757 fhandle_t *fhp; 1758 u_quad_t frev; 1759 1760 #ifndef nolint 1761 vp = (struct vnode *)0; 1762 #endif 1763 fhp = &nfh.fh_generic; 1764 nfsm_srvmtofh(fhp); 1765 nfsm_srvnamesiz(len); 1766 nd.ni_cnd.cn_cred = cred; 1767 nd.ni_cnd.cn_nameiop = DELETE; 1768 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 1769 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 1770 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1771 if (dirp) { 1772 if (v3) 1773 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 1774 procp); 1775 else 1776 vrele(dirp); 1777 } 1778 if (!error) { 1779 vp = nd.ni_vp; 1780 if (vp->v_type == VDIR && 1781 (error = suser(cred, (u_short *)0)) != 0) 1782 goto out; 1783 /* 1784 * The root of a mounted filesystem cannot be deleted. 1785 */ 1786 if (vp->v_flag & VROOT) { 1787 error = EBUSY; 1788 goto out; 1789 } 1790 out: 1791 if (!error) { 1792 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1793 nqsrv_getl(vp, ND_WRITE); 1794 error = VOP_REMOVE(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); 1795 } else { 1796 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1797 if (nd.ni_dvp == vp) 1798 vrele(nd.ni_dvp); 1799 else 1800 vput(nd.ni_dvp); 1801 vput(vp); 1802 } 1803 } 1804 if (dirp && v3) { 1805 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 1806 vrele(dirp); 1807 } 1808 nfsm_reply(NFSX_WCCDATA(v3)); 1809 if (v3) { 1810 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1811 return (0); 1812 } 1813 nfsm_srvdone; 1814 } 1815 1816 /* 1817 * nfs rename service 1818 */ 1819 int 1820 nfsrv_rename(nfsd, slp, procp, mrq) 1821 struct nfsrv_descript *nfsd; 1822 struct nfssvc_sock *slp; 1823 struct proc *procp; 1824 struct mbuf **mrq; 1825 { 1826 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1827 struct mbuf *nam = nfsd->nd_nam; 1828 caddr_t dpos = nfsd->nd_dpos; 1829 struct ucred *cred = &nfsd->nd_cr; 1830 u_int32_t *tl; 1831 int32_t t1; 1832 caddr_t bpos; 1833 int error = 0, cache, fdirfor_ret = 1, fdiraft_ret = 1; 1834 uint32_t len, len2; 1835 int tdirfor_ret = 1, tdiraft_ret = 1; 1836 int v3 = (nfsd->nd_flag & ND_NFSV3); 1837 char *cp2; 1838 struct mbuf *mb, *mreq; 1839 struct nameidata fromnd, tond; 1840 struct vnode *fvp, *tvp, *tdvp, *fdirp = (struct vnode *)0; 1841 struct vnode *tdirp = (struct vnode *)0; 1842 struct vattr fdirfor, fdiraft, tdirfor, tdiraft; 1843 nfsfh_t fnfh, tnfh; 1844 fhandle_t *ffhp, *tfhp; 1845 u_quad_t frev; 1846 uid_t saved_uid; 1847 1848 #ifndef nolint 1849 fvp = (struct vnode *)0; 1850 #endif 1851 ffhp = &fnfh.fh_generic; 1852 tfhp = &tnfh.fh_generic; 1853 fromnd.ni_cnd.cn_nameiop = 0; 1854 tond.ni_cnd.cn_nameiop = 0; 1855 nfsm_srvmtofh(ffhp); 1856 nfsm_srvnamesiz(len); 1857 /* 1858 * Remember our original uid so that we can reset cr_uid before 1859 * the second nfs_namei() call, in case it is remapped. 1860 */ 1861 saved_uid = cred->cr_uid; 1862 fromnd.ni_cnd.cn_cred = cred; 1863 fromnd.ni_cnd.cn_nameiop = DELETE; 1864 fromnd.ni_cnd.cn_flags = WANTPARENT | SAVESTART; 1865 error = nfs_namei(&fromnd, ffhp, len, slp, nam, &md, 1866 &dpos, &fdirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1867 if (fdirp) { 1868 if (v3) 1869 fdirfor_ret = VOP_GETATTR(fdirp, &fdirfor, cred, 1870 procp); 1871 else { 1872 vrele(fdirp); 1873 fdirp = (struct vnode *)0; 1874 } 1875 } 1876 if (error) { 1877 nfsm_reply(2 * NFSX_WCCDATA(v3)); 1878 nfsm_srvwcc_data(fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft); 1879 nfsm_srvwcc_data(tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft); 1880 if (fdirp) 1881 vrele(fdirp); 1882 return (0); 1883 } 1884 fvp = fromnd.ni_vp; 1885 nfsm_srvmtofh(tfhp); 1886 if (v3) { 1887 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 1888 len2 = fxdr_unsigned(uint32_t, *tl); 1889 /* len2 will be checked by nfs_namei */ 1890 } 1891 else { 1892 /* NFSv2 */ 1893 nfsm_strsiz(len2, NFS_MAXNAMLEN); 1894 } 1895 cred->cr_uid = saved_uid; 1896 tond.ni_cnd.cn_cred = cred; 1897 tond.ni_cnd.cn_nameiop = RENAME; 1898 tond.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF | NOCACHE | SAVESTART; 1899 error = nfs_namei(&tond, tfhp, len2, slp, nam, &md, 1900 &dpos, &tdirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1901 if (tdirp) { 1902 if (v3) 1903 tdirfor_ret = VOP_GETATTR(tdirp, &tdirfor, cred, 1904 procp); 1905 else { 1906 vrele(tdirp); 1907 tdirp = (struct vnode *)0; 1908 } 1909 } 1910 if (error) { 1911 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 1912 vrele(fromnd.ni_dvp); 1913 vrele(fvp); 1914 goto out1; 1915 } 1916 tdvp = tond.ni_dvp; 1917 tvp = tond.ni_vp; 1918 if (tvp != NULL) { 1919 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 1920 if (v3) 1921 error = EEXIST; 1922 else 1923 error = EISDIR; 1924 goto out; 1925 } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 1926 if (v3) 1927 error = EEXIST; 1928 else 1929 error = ENOTDIR; 1930 goto out; 1931 } 1932 if (tvp->v_type == VDIR && tvp->v_mountedhere) { 1933 if (v3) 1934 error = EXDEV; 1935 else 1936 error = ENOTEMPTY; 1937 goto out; 1938 } 1939 } 1940 if (fvp->v_type == VDIR && fvp->v_mountedhere) { 1941 if (v3) 1942 error = EXDEV; 1943 else 1944 error = ENOTEMPTY; 1945 goto out; 1946 } 1947 if (fvp->v_mount != tdvp->v_mount) { 1948 if (v3) 1949 error = EXDEV; 1950 else 1951 error = ENOTEMPTY; 1952 goto out; 1953 } 1954 if (fvp == tdvp) { 1955 if (v3) 1956 error = EINVAL; 1957 else 1958 error = ENOTEMPTY; 1959 } 1960 /* 1961 * If source is the same as the destination (that is the 1962 * same vnode with the same name in the same directory), 1963 * then there is nothing to do. 1964 */ 1965 if (fvp == tvp && fromnd.ni_dvp == tdvp && 1966 fromnd.ni_cnd.cn_namelen == tond.ni_cnd.cn_namelen && 1967 !memcmp(fromnd.ni_cnd.cn_nameptr, tond.ni_cnd.cn_nameptr, 1968 fromnd.ni_cnd.cn_namelen)) 1969 error = -1; 1970 out: 1971 if (!error) { 1972 nqsrv_getl(fromnd.ni_dvp, ND_WRITE); 1973 nqsrv_getl(tdvp, ND_WRITE); 1974 if (tvp) { 1975 nqsrv_getl(tvp, ND_WRITE); 1976 } 1977 error = VOP_RENAME(fromnd.ni_dvp, fromnd.ni_vp, &fromnd.ni_cnd, 1978 tond.ni_dvp, tond.ni_vp, &tond.ni_cnd); 1979 } else { 1980 VOP_ABORTOP(tond.ni_dvp, &tond.ni_cnd); 1981 if (tdvp == tvp) 1982 vrele(tdvp); 1983 else 1984 vput(tdvp); 1985 if (tvp) 1986 vput(tvp); 1987 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 1988 vrele(fromnd.ni_dvp); 1989 vrele(fvp); 1990 if (error == -1) 1991 error = 0; 1992 } 1993 vrele(tond.ni_startdir); 1994 PNBUF_PUT(tond.ni_cnd.cn_pnbuf); 1995 out1: 1996 if (fdirp) { 1997 fdiraft_ret = VOP_GETATTR(fdirp, &fdiraft, cred, procp); 1998 vrele(fdirp); 1999 } 2000 if (tdirp) { 2001 tdiraft_ret = VOP_GETATTR(tdirp, &tdiraft, cred, procp); 2002 vrele(tdirp); 2003 } 2004 vrele(fromnd.ni_startdir); 2005 PNBUF_PUT(fromnd.ni_cnd.cn_pnbuf); 2006 nfsm_reply(2 * NFSX_WCCDATA(v3)); 2007 if (v3) { 2008 nfsm_srvwcc_data(fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft); 2009 nfsm_srvwcc_data(tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft); 2010 } 2011 return (0); 2012 2013 nfsmout: 2014 if (fdirp) 2015 vrele(fdirp); 2016 if (tdirp) 2017 vrele(tdirp); 2018 if (tond.ni_cnd.cn_nameiop) { 2019 vrele(tond.ni_startdir); 2020 PNBUF_PUT(tond.ni_cnd.cn_pnbuf); 2021 } 2022 if (fromnd.ni_cnd.cn_nameiop) { 2023 vrele(fromnd.ni_startdir); 2024 PNBUF_PUT(fromnd.ni_cnd.cn_pnbuf); 2025 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 2026 vrele(fromnd.ni_dvp); 2027 vrele(fvp); 2028 } 2029 return (error); 2030 } 2031 2032 /* 2033 * nfs link service 2034 */ 2035 int 2036 nfsrv_link(nfsd, slp, procp, mrq) 2037 struct nfsrv_descript *nfsd; 2038 struct nfssvc_sock *slp; 2039 struct proc *procp; 2040 struct mbuf **mrq; 2041 { 2042 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2043 struct mbuf *nam = nfsd->nd_nam; 2044 caddr_t dpos = nfsd->nd_dpos; 2045 struct ucred *cred = &nfsd->nd_cr; 2046 struct nameidata nd; 2047 u_int32_t *tl; 2048 int32_t t1; 2049 caddr_t bpos; 2050 int error = 0, rdonly, cache, len, dirfor_ret = 1, diraft_ret = 1; 2051 int getret = 1, v3 = (nfsd->nd_flag & ND_NFSV3); 2052 char *cp2; 2053 struct mbuf *mb, *mreq; 2054 struct vnode *vp, *xp, *dirp = (struct vnode *)0; 2055 struct vattr dirfor, diraft, at; 2056 nfsfh_t nfh, dnfh; 2057 fhandle_t *fhp, *dfhp; 2058 u_quad_t frev; 2059 2060 fhp = &nfh.fh_generic; 2061 dfhp = &dnfh.fh_generic; 2062 nfsm_srvmtofh(fhp); 2063 nfsm_srvmtofh(dfhp); 2064 nfsm_srvnamesiz(len); 2065 error = nfsrv_fhtovp(fhp, FALSE, &vp, cred, slp, nam, 2066 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2067 if (error) { 2068 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2069 nfsm_srvpostop_attr(getret, &at); 2070 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2071 return (0); 2072 } 2073 if (vp->v_type == VDIR && (error = suser(cred, (u_short *)0)) != 0) 2074 goto out1; 2075 nd.ni_cnd.cn_cred = cred; 2076 nd.ni_cnd.cn_nameiop = CREATE; 2077 nd.ni_cnd.cn_flags = LOCKPARENT; 2078 error = nfs_namei(&nd, dfhp, len, slp, nam, &md, &dpos, 2079 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2080 if (dirp) { 2081 if (v3) 2082 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 2083 procp); 2084 else { 2085 vrele(dirp); 2086 dirp = (struct vnode *)0; 2087 } 2088 } 2089 if (error) 2090 goto out1; 2091 xp = nd.ni_vp; 2092 if (xp != NULL) { 2093 error = EEXIST; 2094 goto out; 2095 } 2096 xp = nd.ni_dvp; 2097 if (vp->v_mount != xp->v_mount) 2098 error = EXDEV; 2099 out: 2100 if (!error) { 2101 nqsrv_getl(vp, ND_WRITE); 2102 nqsrv_getl(xp, ND_WRITE); 2103 error = VOP_LINK(nd.ni_dvp, vp, &nd.ni_cnd); 2104 } else { 2105 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2106 if (nd.ni_dvp == nd.ni_vp) 2107 vrele(nd.ni_dvp); 2108 else 2109 vput(nd.ni_dvp); 2110 if (nd.ni_vp) 2111 vrele(nd.ni_vp); 2112 } 2113 out1: 2114 if (v3) 2115 getret = VOP_GETATTR(vp, &at, cred, procp); 2116 if (dirp) { 2117 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 2118 vrele(dirp); 2119 } 2120 vrele(vp); 2121 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2122 if (v3) { 2123 nfsm_srvpostop_attr(getret, &at); 2124 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2125 return (0); 2126 } 2127 nfsm_srvdone; 2128 } 2129 2130 /* 2131 * nfs symbolic link service 2132 */ 2133 int 2134 nfsrv_symlink(nfsd, slp, procp, mrq) 2135 struct nfsrv_descript *nfsd; 2136 struct nfssvc_sock *slp; 2137 struct proc *procp; 2138 struct mbuf **mrq; 2139 { 2140 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2141 struct mbuf *nam = nfsd->nd_nam; 2142 caddr_t dpos = nfsd->nd_dpos; 2143 struct ucred *cred = &nfsd->nd_cr; 2144 struct vattr va, dirfor, diraft; 2145 struct nameidata nd; 2146 u_int32_t *tl; 2147 int32_t t1; 2148 struct nfsv2_sattr *sp; 2149 char *bpos, *pathcp = NULL, *cp2; 2150 struct uio io; 2151 struct iovec iv; 2152 int error = 0, cache, dirfor_ret = 1, diraft_ret = 1; 2153 uint32_t len, len2; 2154 int v3 = (nfsd->nd_flag & ND_NFSV3); 2155 struct mbuf *mb, *mreq; 2156 struct vnode *dirp = (struct vnode *)0; 2157 nfsfh_t nfh; 2158 fhandle_t *fhp; 2159 u_quad_t frev; 2160 2161 nd.ni_cnd.cn_nameiop = 0; 2162 fhp = &nfh.fh_generic; 2163 nfsm_srvmtofh(fhp); 2164 nfsm_srvnamesiz(len); 2165 nd.ni_cnd.cn_cred = cred; 2166 nd.ni_cnd.cn_nameiop = CREATE; 2167 nd.ni_cnd.cn_flags = LOCKPARENT; 2168 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 2169 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2170 if (dirp) { 2171 if (v3) 2172 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 2173 procp); 2174 else { 2175 vrele(dirp); 2176 dirp = (struct vnode *)0; 2177 } 2178 } 2179 if (error) 2180 goto out; 2181 VATTR_NULL(&va); 2182 if (v3) { 2183 nfsm_srvsattr(&va); 2184 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 2185 len2 = fxdr_unsigned(uint32_t, *tl); 2186 if (len2 > PATH_MAX) { 2187 /* XXX should check _PC_NO_TRUNC */ 2188 error = ENAMETOOLONG; 2189 goto abortop; 2190 } 2191 } 2192 else { 2193 /* NFSv2 */ 2194 nfsm_strsiz(len2, NFS_MAXPATHLEN); 2195 } 2196 pathcp = malloc(len2 + 1, M_TEMP, M_WAITOK); 2197 iv.iov_base = pathcp; 2198 iv.iov_len = len2; 2199 io.uio_resid = len2; 2200 io.uio_offset = 0; 2201 io.uio_iov = &iv; 2202 io.uio_iovcnt = 1; 2203 io.uio_segflg = UIO_SYSSPACE; 2204 io.uio_rw = UIO_READ; 2205 io.uio_procp = (struct proc *)0; 2206 nfsm_mtouio(&io, len2); 2207 if (!v3) { 2208 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2209 va.va_mode = fxdr_unsigned(u_int16_t, sp->sa_mode); 2210 } 2211 *(pathcp + len2) = '\0'; 2212 if (nd.ni_vp) { 2213 error = EEXIST; 2214 abortop: 2215 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2216 if (nd.ni_dvp == nd.ni_vp) 2217 vrele(nd.ni_dvp); 2218 else 2219 vput(nd.ni_dvp); 2220 if (nd.ni_vp) 2221 vrele(nd.ni_vp); 2222 goto out; 2223 } 2224 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2225 error = VOP_SYMLINK(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va, pathcp); 2226 if (!error) { 2227 if (v3) { 2228 memset((caddr_t)fhp, 0, sizeof(nfh)); 2229 fhp->fh_fsid = nd.ni_vp->v_mount->mnt_stat.f_fsid; 2230 error = VFS_VPTOFH(nd.ni_vp, &fhp->fh_fid); 2231 if (!error) 2232 error = VOP_GETATTR(nd.ni_vp, &va, cred, 2233 procp); 2234 vput(nd.ni_vp); 2235 } else { 2236 vput(nd.ni_vp); 2237 } 2238 } 2239 out: 2240 if (pathcp) 2241 free(pathcp, M_TEMP); 2242 if (dirp) { 2243 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 2244 vrele(dirp); 2245 } 2246 nfsm_reply(NFSX_SRVFH(v3) + NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2247 if (v3) { 2248 if (!error) { 2249 nfsm_srvpostop_fh(fhp); 2250 nfsm_srvpostop_attr(0, &va); 2251 } 2252 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2253 } 2254 return (0); 2255 nfsmout: 2256 if (dirp) 2257 vrele(dirp); 2258 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2259 if (nd.ni_dvp == nd.ni_vp) 2260 vrele(nd.ni_dvp); 2261 else 2262 vput(nd.ni_dvp); 2263 if (nd.ni_vp) 2264 vrele(nd.ni_vp); 2265 if (pathcp) 2266 free(pathcp, M_TEMP); 2267 return (error); 2268 } 2269 2270 /* 2271 * nfs mkdir service 2272 */ 2273 int 2274 nfsrv_mkdir(nfsd, slp, procp, mrq) 2275 struct nfsrv_descript *nfsd; 2276 struct nfssvc_sock *slp; 2277 struct proc *procp; 2278 struct mbuf **mrq; 2279 { 2280 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2281 struct mbuf *nam = nfsd->nd_nam; 2282 caddr_t dpos = nfsd->nd_dpos; 2283 struct ucred *cred = &nfsd->nd_cr; 2284 struct vattr va, dirfor, diraft; 2285 struct nfs_fattr *fp; 2286 struct nameidata nd; 2287 caddr_t cp; 2288 u_int32_t *tl; 2289 int32_t t1; 2290 caddr_t bpos; 2291 int error = 0, cache, len, dirfor_ret = 1, diraft_ret = 1; 2292 int v3 = (nfsd->nd_flag & ND_NFSV3); 2293 char *cp2; 2294 struct mbuf *mb, *mreq; 2295 struct vnode *vp, *dirp = (struct vnode *)0; 2296 nfsfh_t nfh; 2297 fhandle_t *fhp; 2298 u_quad_t frev; 2299 2300 fhp = &nfh.fh_generic; 2301 nfsm_srvmtofh(fhp); 2302 nfsm_srvnamesiz(len); 2303 nd.ni_cnd.cn_cred = cred; 2304 nd.ni_cnd.cn_nameiop = CREATE; 2305 nd.ni_cnd.cn_flags = LOCKPARENT; 2306 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 2307 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2308 if (dirp) { 2309 if (v3) 2310 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 2311 procp); 2312 else { 2313 vrele(dirp); 2314 dirp = (struct vnode *)0; 2315 } 2316 } 2317 if (error) { 2318 nfsm_reply(NFSX_WCCDATA(v3)); 2319 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2320 if (dirp) 2321 vrele(dirp); 2322 return (0); 2323 } 2324 VATTR_NULL(&va); 2325 if (v3) { 2326 nfsm_srvsattr(&va); 2327 } else { 2328 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2329 va.va_mode = nfstov_mode(*tl++); 2330 } 2331 va.va_type = VDIR; 2332 vp = nd.ni_vp; 2333 if (vp != NULL) { 2334 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2335 if (nd.ni_dvp == vp) 2336 vrele(nd.ni_dvp); 2337 else 2338 vput(nd.ni_dvp); 2339 vrele(vp); 2340 error = EEXIST; 2341 goto out; 2342 } 2343 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2344 error = VOP_MKDIR(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 2345 if (!error) { 2346 vp = nd.ni_vp; 2347 memset((caddr_t)fhp, 0, sizeof(nfh)); 2348 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; 2349 error = VFS_VPTOFH(vp, &fhp->fh_fid); 2350 if (!error) 2351 error = VOP_GETATTR(vp, &va, cred, procp); 2352 vput(vp); 2353 } 2354 out: 2355 if (dirp) { 2356 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 2357 vrele(dirp); 2358 } 2359 nfsm_reply(NFSX_SRVFH(v3) + NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2360 if (v3) { 2361 if (!error) { 2362 nfsm_srvpostop_fh(fhp); 2363 nfsm_srvpostop_attr(0, &va); 2364 } 2365 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2366 } else { 2367 nfsm_srvfhtom(fhp, v3); 2368 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 2369 nfsm_srvfillattr(&va, fp); 2370 } 2371 return (0); 2372 nfsmout: 2373 if (dirp) 2374 vrele(dirp); 2375 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2376 if (nd.ni_dvp == nd.ni_vp) 2377 vrele(nd.ni_dvp); 2378 else 2379 vput(nd.ni_dvp); 2380 if (nd.ni_vp) 2381 vrele(nd.ni_vp); 2382 return (error); 2383 } 2384 2385 /* 2386 * nfs rmdir service 2387 */ 2388 int 2389 nfsrv_rmdir(nfsd, slp, procp, mrq) 2390 struct nfsrv_descript *nfsd; 2391 struct nfssvc_sock *slp; 2392 struct proc *procp; 2393 struct mbuf **mrq; 2394 { 2395 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2396 struct mbuf *nam = nfsd->nd_nam; 2397 caddr_t dpos = nfsd->nd_dpos; 2398 struct ucred *cred = &nfsd->nd_cr; 2399 u_int32_t *tl; 2400 int32_t t1; 2401 caddr_t bpos; 2402 int error = 0, cache, len, dirfor_ret = 1, diraft_ret = 1; 2403 int v3 = (nfsd->nd_flag & ND_NFSV3); 2404 char *cp2; 2405 struct mbuf *mb, *mreq; 2406 struct vnode *vp, *dirp = (struct vnode *)0; 2407 struct vattr dirfor, diraft; 2408 nfsfh_t nfh; 2409 fhandle_t *fhp; 2410 struct nameidata nd; 2411 u_quad_t frev; 2412 2413 fhp = &nfh.fh_generic; 2414 nfsm_srvmtofh(fhp); 2415 nfsm_srvnamesiz(len); 2416 nd.ni_cnd.cn_cred = cred; 2417 nd.ni_cnd.cn_nameiop = DELETE; 2418 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 2419 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 2420 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2421 if (dirp) { 2422 if (v3) 2423 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 2424 procp); 2425 else { 2426 vrele(dirp); 2427 dirp = (struct vnode *)0; 2428 } 2429 } 2430 if (error) { 2431 nfsm_reply(NFSX_WCCDATA(v3)); 2432 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2433 if (dirp) 2434 vrele(dirp); 2435 return (0); 2436 } 2437 vp = nd.ni_vp; 2438 if (vp->v_type != VDIR) { 2439 error = ENOTDIR; 2440 goto out; 2441 } 2442 /* 2443 * No rmdir "." please. 2444 */ 2445 if (nd.ni_dvp == vp) { 2446 error = EINVAL; 2447 goto out; 2448 } 2449 /* 2450 * The root of a mounted filesystem cannot be deleted. 2451 */ 2452 if (vp->v_flag & VROOT) 2453 error = EBUSY; 2454 out: 2455 if (!error) { 2456 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2457 nqsrv_getl(vp, ND_WRITE); 2458 error = VOP_RMDIR(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); 2459 } else { 2460 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2461 if (nd.ni_dvp == nd.ni_vp) 2462 vrele(nd.ni_dvp); 2463 else 2464 vput(nd.ni_dvp); 2465 vput(vp); 2466 } 2467 if (dirp) { 2468 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 2469 vrele(dirp); 2470 } 2471 nfsm_reply(NFSX_WCCDATA(v3)); 2472 if (v3) { 2473 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2474 return (0); 2475 } 2476 nfsm_srvdone; 2477 } 2478 2479 /* 2480 * nfs readdir service 2481 * - mallocs what it thinks is enough to read 2482 * count rounded up to a multiple of NFS_DIRBLKSIZ <= NFS_MAXREADDIR 2483 * - calls VOP_READDIR() 2484 * - loops around building the reply 2485 * if the output generated exceeds count break out of loop 2486 * The nfsm_clget macro is used here so that the reply will be packed 2487 * tightly in mbuf clusters. 2488 * - it only knows that it has encountered eof when the VOP_READDIR() 2489 * reads nothing 2490 * - as such one readdir rpc will return eof false although you are there 2491 * and then the next will return eof 2492 * - it trims out records with d_fileno == 0 2493 * this doesn't matter for Unix clients, but they might confuse clients 2494 * for other os'. 2495 * - it trims out records with d_type == DT_WHT 2496 * these cannot be seen through NFS (unless we extend the protocol) 2497 * NB: It is tempting to set eof to true if the VOP_READDIR() reads less 2498 * than requested, but this may not apply to all filesystems. For 2499 * example, client NFS does not { although it is never remote mounted 2500 * anyhow } 2501 * The alternate call nfsrv_readdirplus() does lookups as well. 2502 * PS: The NFS protocol spec. does not clarify what the "count" byte 2503 * argument is a count of.. just name strings and file id's or the 2504 * entire reply rpc or ... 2505 * I tried just file name and id sizes and it confused the Sun client, 2506 * so I am using the full rpc size now. The "paranoia.." comment refers 2507 * to including the status longwords that are not a part of the dir. 2508 * "entry" structures, but are in the rpc. 2509 */ 2510 struct flrep { 2511 nfsuint64 fl_off; 2512 u_int32_t fl_postopok; 2513 u_int32_t fl_fattr[NFSX_V3FATTR / sizeof (u_int32_t)]; 2514 u_int32_t fl_fhok; 2515 u_int32_t fl_fhsize; 2516 u_int32_t fl_nfh[NFSX_V3FH / sizeof (u_int32_t)]; 2517 }; 2518 2519 int 2520 nfsrv_readdir(nfsd, slp, procp, mrq) 2521 struct nfsrv_descript *nfsd; 2522 struct nfssvc_sock *slp; 2523 struct proc *procp; 2524 struct mbuf **mrq; 2525 { 2526 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2527 struct mbuf *nam = nfsd->nd_nam; 2528 caddr_t dpos = nfsd->nd_dpos; 2529 struct ucred *cred = &nfsd->nd_cr; 2530 char *bp, *be; 2531 struct mbuf *mp; 2532 struct dirent *dp; 2533 caddr_t cp; 2534 u_int32_t *tl; 2535 int32_t t1; 2536 caddr_t bpos; 2537 struct mbuf *mb, *mreq, *mp2; 2538 char *cpos, *cend, *cp2, *rbuf; 2539 struct vnode *vp; 2540 struct vattr at; 2541 nfsfh_t nfh; 2542 fhandle_t *fhp; 2543 struct uio io; 2544 struct iovec iv; 2545 int len, nlen, rem, xfer, tsiz, i, error = 0, getret = 1; 2546 int siz, cnt, fullsiz, eofflag, rdonly, cache, ncookies; 2547 int v3 = (nfsd->nd_flag & ND_NFSV3); 2548 u_quad_t frev, off, toff, verf; 2549 off_t *cookies = NULL, *cookiep; 2550 nfsuint64 jar; 2551 2552 fhp = &nfh.fh_generic; 2553 nfsm_srvmtofh(fhp); 2554 if (v3) { 2555 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 2556 toff = fxdr_hyper(tl); 2557 tl += 2; 2558 verf = fxdr_hyper(tl); 2559 tl += 2; 2560 } else { 2561 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2562 toff = fxdr_unsigned(u_quad_t, *tl++); 2563 } 2564 off = toff; 2565 cnt = fxdr_unsigned(int, *tl); 2566 siz = ((cnt + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1)); 2567 xfer = NFS_SRVMAXDATA(nfsd); 2568 if (siz > xfer) 2569 siz = xfer; 2570 fullsiz = siz; 2571 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 2572 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2573 if (!error && vp->v_type != VDIR) { 2574 error = ENOTDIR; 2575 vput(vp); 2576 } 2577 if (error) { 2578 nfsm_reply(NFSX_UNSIGNED); 2579 nfsm_srvpostop_attr(getret, &at); 2580 return (0); 2581 } 2582 nqsrv_getl(vp, ND_READ); 2583 if (v3) { 2584 error = getret = VOP_GETATTR(vp, &at, cred, procp); 2585 #ifdef NFS3_STRICTVERF 2586 /* 2587 * XXX This check is too strict for Solaris 2.5 clients. 2588 */ 2589 if (!error && toff && verf != at.va_filerev) 2590 error = NFSERR_BAD_COOKIE; 2591 #endif 2592 } 2593 if (!error) 2594 error = nfsrv_access(vp, VEXEC, cred, rdonly, procp, 0); 2595 if (error) { 2596 vput(vp); 2597 nfsm_reply(NFSX_POSTOPATTR(v3)); 2598 nfsm_srvpostop_attr(getret, &at); 2599 return (0); 2600 } 2601 VOP_UNLOCK(vp, 0); 2602 rbuf = malloc(siz, M_TEMP, M_WAITOK); 2603 again: 2604 iv.iov_base = rbuf; 2605 iv.iov_len = fullsiz; 2606 io.uio_iov = &iv; 2607 io.uio_iovcnt = 1; 2608 io.uio_offset = (off_t)off; 2609 io.uio_resid = fullsiz; 2610 io.uio_segflg = UIO_SYSSPACE; 2611 io.uio_rw = UIO_READ; 2612 io.uio_procp = (struct proc *)0; 2613 eofflag = 0; 2614 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2615 2616 error = VOP_READDIR(vp, &io, cred, &eofflag, &cookies, &ncookies); 2617 2618 off = (off_t)io.uio_offset; 2619 if (!cookies && !error) 2620 error = NFSERR_PERM; 2621 if (v3) { 2622 getret = VOP_GETATTR(vp, &at, cred, procp); 2623 if (!error) 2624 error = getret; 2625 } 2626 2627 VOP_UNLOCK(vp, 0); 2628 if (error) { 2629 vrele(vp); 2630 free((caddr_t)rbuf, M_TEMP); 2631 if (cookies) 2632 free((caddr_t)cookies, M_TEMP); 2633 nfsm_reply(NFSX_POSTOPATTR(v3)); 2634 nfsm_srvpostop_attr(getret, &at); 2635 return (0); 2636 } 2637 if (io.uio_resid) { 2638 siz -= io.uio_resid; 2639 2640 /* 2641 * If nothing read, return eof 2642 * rpc reply 2643 */ 2644 if (siz == 0) { 2645 vrele(vp); 2646 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_COOKIEVERF(v3) + 2647 2 * NFSX_UNSIGNED); 2648 if (v3) { 2649 nfsm_srvpostop_attr(getret, &at); 2650 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 2651 txdr_hyper(at.va_filerev, tl); 2652 tl += 2; 2653 } else 2654 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2655 *tl++ = nfs_false; 2656 *tl = nfs_true; 2657 free((caddr_t)rbuf, M_TEMP); 2658 free((caddr_t)cookies, M_TEMP); 2659 return (0); 2660 } 2661 } 2662 2663 /* 2664 * Check for degenerate cases of nothing useful read. 2665 * If so go try again 2666 */ 2667 cpos = rbuf; 2668 cend = rbuf + siz; 2669 dp = (struct dirent *)cpos; 2670 cookiep = cookies; 2671 2672 while (cpos < cend && ncookies > 0 && 2673 (dp->d_fileno == 0 || dp->d_type == DT_WHT)) { 2674 cpos += dp->d_reclen; 2675 dp = (struct dirent *)cpos; 2676 cookiep++; 2677 ncookies--; 2678 } 2679 if (cpos >= cend || ncookies == 0) { 2680 toff = off; 2681 siz = fullsiz; 2682 goto again; 2683 } 2684 2685 len = 3 * NFSX_UNSIGNED; /* paranoia, probably can be 0 */ 2686 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_COOKIEVERF(v3) + siz); 2687 if (v3) { 2688 nfsm_srvpostop_attr(getret, &at); 2689 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2690 txdr_hyper(at.va_filerev, tl); 2691 } 2692 mp = mp2 = mb; 2693 bp = bpos; 2694 be = bp + M_TRAILINGSPACE(mp); 2695 2696 /* Loop through the records and build reply */ 2697 while (cpos < cend && ncookies > 0) { 2698 if (dp->d_fileno != 0 && dp->d_type != DT_WHT) { 2699 nlen = dp->d_namlen; 2700 rem = nfsm_rndup(nlen)-nlen; 2701 len += (4 * NFSX_UNSIGNED + nlen + rem); 2702 if (v3) 2703 len += 2 * NFSX_UNSIGNED; 2704 if (len > cnt) { 2705 eofflag = 0; 2706 break; 2707 } 2708 /* 2709 * Build the directory record xdr from 2710 * the dirent entry. 2711 */ 2712 nfsm_clget; 2713 *tl = nfs_true; 2714 bp += NFSX_UNSIGNED; 2715 if (v3) { 2716 nfsm_clget; 2717 *tl = 0; 2718 bp += NFSX_UNSIGNED; 2719 } 2720 nfsm_clget; 2721 *tl = txdr_unsigned(dp->d_fileno); 2722 bp += NFSX_UNSIGNED; 2723 nfsm_clget; 2724 *tl = txdr_unsigned(nlen); 2725 bp += NFSX_UNSIGNED; 2726 2727 /* And loop around copying the name */ 2728 xfer = nlen; 2729 cp = dp->d_name; 2730 while (xfer > 0) { 2731 nfsm_clget; 2732 if ((bp+xfer) > be) 2733 tsiz = be-bp; 2734 else 2735 tsiz = xfer; 2736 memcpy(bp, cp, tsiz); 2737 bp += tsiz; 2738 xfer -= tsiz; 2739 if (xfer > 0) 2740 cp += tsiz; 2741 } 2742 /* And null pad to an int32_t boundary */ 2743 for (i = 0; i < rem; i++) 2744 *bp++ = '\0'; 2745 nfsm_clget; 2746 2747 /* Finish off the record */ 2748 txdr_hyper(*cookiep, &jar); 2749 if (v3) { 2750 *tl = jar.nfsuquad[0]; 2751 bp += NFSX_UNSIGNED; 2752 nfsm_clget; 2753 } 2754 *tl = jar.nfsuquad[1]; 2755 bp += NFSX_UNSIGNED; 2756 } 2757 cpos += dp->d_reclen; 2758 dp = (struct dirent *)cpos; 2759 cookiep++; 2760 ncookies--; 2761 } 2762 vrele(vp); 2763 nfsm_clget; 2764 *tl = nfs_false; 2765 bp += NFSX_UNSIGNED; 2766 nfsm_clget; 2767 if (eofflag) 2768 *tl = nfs_true; 2769 else 2770 *tl = nfs_false; 2771 bp += NFSX_UNSIGNED; 2772 if (mp != mb) { 2773 if (bp < be) 2774 mp->m_len = bp - mtod(mp, caddr_t); 2775 } else 2776 mp->m_len += bp - bpos; 2777 free((caddr_t)rbuf, M_TEMP); 2778 free((caddr_t)cookies, M_TEMP); 2779 nfsm_srvdone; 2780 } 2781 2782 int 2783 nfsrv_readdirplus(nfsd, slp, procp, mrq) 2784 struct nfsrv_descript *nfsd; 2785 struct nfssvc_sock *slp; 2786 struct proc *procp; 2787 struct mbuf **mrq; 2788 { 2789 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2790 struct mbuf *nam = nfsd->nd_nam; 2791 caddr_t dpos = nfsd->nd_dpos; 2792 struct ucred *cred = &nfsd->nd_cr; 2793 char *bp, *be; 2794 struct mbuf *mp; 2795 struct dirent *dp; 2796 caddr_t cp; 2797 u_int32_t *tl; 2798 int32_t t1; 2799 caddr_t bpos; 2800 struct mbuf *mb, *mreq, *mp2; 2801 char *cpos, *cend, *cp2, *rbuf; 2802 struct vnode *vp, *nvp; 2803 struct flrep fl; 2804 nfsfh_t nfh; 2805 fhandle_t *fhp, *nfhp = (fhandle_t *)fl.fl_nfh; 2806 struct uio io; 2807 struct iovec iv; 2808 struct vattr va, at, *vap = &va; 2809 struct nfs_fattr *fp; 2810 int len, nlen, rem, xfer, tsiz, i, error = 0, getret = 1; 2811 int siz, cnt, fullsiz, eofflag, rdonly, cache, dirlen, ncookies; 2812 u_quad_t frev, off, toff, verf; 2813 off_t *cookies = NULL, *cookiep; 2814 2815 fhp = &nfh.fh_generic; 2816 nfsm_srvmtofh(fhp); 2817 nfsm_dissect(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 2818 toff = fxdr_hyper(tl); 2819 tl += 2; 2820 verf = fxdr_hyper(tl); 2821 tl += 2; 2822 siz = fxdr_unsigned(int, *tl++); 2823 cnt = fxdr_unsigned(int, *tl); 2824 off = toff; 2825 siz = ((siz + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1)); 2826 xfer = NFS_SRVMAXDATA(nfsd); 2827 if (siz > xfer) 2828 siz = xfer; 2829 fullsiz = siz; 2830 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 2831 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2832 if (!error && vp->v_type != VDIR) { 2833 error = ENOTDIR; 2834 vput(vp); 2835 } 2836 if (error) { 2837 nfsm_reply(NFSX_UNSIGNED); 2838 nfsm_srvpostop_attr(getret, &at); 2839 return (0); 2840 } 2841 error = getret = VOP_GETATTR(vp, &at, cred, procp); 2842 #ifdef NFS3_STRICTVERF 2843 /* 2844 * XXX This check is too strict for Solaris 2.5 clients. 2845 */ 2846 if (!error && toff && verf != at.va_filerev) 2847 error = NFSERR_BAD_COOKIE; 2848 #endif 2849 if (!error) { 2850 nqsrv_getl(vp, ND_READ); 2851 error = nfsrv_access(vp, VEXEC, cred, rdonly, procp, 0); 2852 } 2853 if (error) { 2854 vput(vp); 2855 nfsm_reply(NFSX_V3POSTOPATTR); 2856 nfsm_srvpostop_attr(getret, &at); 2857 return (0); 2858 } 2859 VOP_UNLOCK(vp, 0); 2860 2861 rbuf = malloc(siz, M_TEMP, M_WAITOK); 2862 again: 2863 iv.iov_base = rbuf; 2864 iv.iov_len = fullsiz; 2865 io.uio_iov = &iv; 2866 io.uio_iovcnt = 1; 2867 io.uio_offset = (off_t)off; 2868 io.uio_resid = fullsiz; 2869 io.uio_segflg = UIO_SYSSPACE; 2870 io.uio_rw = UIO_READ; 2871 io.uio_procp = (struct proc *)0; 2872 eofflag = 0; 2873 2874 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2875 2876 error = VOP_READDIR(vp, &io, cred, &eofflag, &cookies, &ncookies); 2877 2878 off = (u_quad_t)io.uio_offset; 2879 getret = VOP_GETATTR(vp, &at, cred, procp); 2880 2881 VOP_UNLOCK(vp, 0); 2882 2883 /* 2884 * If the VGET operation doesn't work for this filesystem, 2885 * we can't support readdirplus. Returning NOTSUPP should 2886 * make clients fall back to plain readdir. 2887 * There's no need to check for VPTOFH as well, we wouldn't 2888 * even be here otherwise. 2889 */ 2890 if (!getret) { 2891 if ((getret = VFS_VGET(vp->v_mount, at.va_fileid, &nvp))) 2892 getret = (getret == EOPNOTSUPP) ? 2893 NFSERR_NOTSUPP : NFSERR_IO; 2894 else 2895 vput(nvp); 2896 } 2897 2898 if (!cookies && !error) 2899 error = NFSERR_PERM; 2900 if (!error) 2901 error = getret; 2902 if (error) { 2903 vrele(vp); 2904 if (cookies) 2905 free((caddr_t)cookies, M_TEMP); 2906 free((caddr_t)rbuf, M_TEMP); 2907 nfsm_reply(NFSX_V3POSTOPATTR); 2908 nfsm_srvpostop_attr(getret, &at); 2909 return (0); 2910 } 2911 if (io.uio_resid) { 2912 siz -= io.uio_resid; 2913 2914 /* 2915 * If nothing read, return eof 2916 * rpc reply 2917 */ 2918 if (siz == 0) { 2919 vrele(vp); 2920 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF + 2921 2 * NFSX_UNSIGNED); 2922 nfsm_srvpostop_attr(getret, &at); 2923 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 2924 txdr_hyper(at.va_filerev, tl); 2925 tl += 2; 2926 *tl++ = nfs_false; 2927 *tl = nfs_true; 2928 free((caddr_t)cookies, M_TEMP); 2929 free((caddr_t)rbuf, M_TEMP); 2930 return (0); 2931 } 2932 } 2933 2934 /* 2935 * Check for degenerate cases of nothing useful read. 2936 * If so go try again 2937 */ 2938 cpos = rbuf; 2939 cend = rbuf + siz; 2940 dp = (struct dirent *)cpos; 2941 cookiep = cookies; 2942 2943 while (cpos < cend && ncookies > 0 && 2944 (dp->d_fileno == 0 || dp->d_type == DT_WHT)) { 2945 cpos += dp->d_reclen; 2946 dp = (struct dirent *)cpos; 2947 cookiep++; 2948 ncookies--; 2949 } 2950 if (cpos >= cend || ncookies == 0) { 2951 toff = off; 2952 siz = fullsiz; 2953 goto again; 2954 } 2955 2956 dirlen = len = NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF + 2 * NFSX_UNSIGNED; 2957 nfsm_reply(cnt); 2958 nfsm_srvpostop_attr(getret, &at); 2959 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2960 txdr_hyper(at.va_filerev, tl); 2961 mp = mp2 = mb; 2962 bp = bpos; 2963 be = bp + M_TRAILINGSPACE(mp); 2964 2965 /* Loop through the records and build reply */ 2966 while (cpos < cend && ncookies > 0) { 2967 if (dp->d_fileno != 0 && dp->d_type != DT_WHT) { 2968 nlen = dp->d_namlen; 2969 rem = nfsm_rndup(nlen)-nlen; 2970 2971 /* 2972 * For readdir_and_lookup get the vnode using 2973 * the file number. 2974 */ 2975 if (VFS_VGET(vp->v_mount, dp->d_fileno, &nvp)) 2976 goto invalid; 2977 memset((caddr_t)nfhp, 0, NFSX_V3FH); 2978 nfhp->fh_fsid = 2979 nvp->v_mount->mnt_stat.f_fsid; 2980 if (VFS_VPTOFH(nvp, &nfhp->fh_fid)) { 2981 vput(nvp); 2982 goto invalid; 2983 } 2984 if (VOP_GETATTR(nvp, vap, cred, procp)) { 2985 vput(nvp); 2986 goto invalid; 2987 } 2988 vput(nvp); 2989 2990 /* 2991 * If either the dircount or maxcount will be 2992 * exceeded, get out now. Both of these lengths 2993 * are calculated conservatively, including all 2994 * XDR overheads. 2995 */ 2996 len += (8 * NFSX_UNSIGNED + nlen + rem + NFSX_V3FH + 2997 NFSX_V3POSTOPATTR); 2998 dirlen += (6 * NFSX_UNSIGNED + nlen + rem); 2999 if (len > cnt || dirlen > fullsiz) { 3000 eofflag = 0; 3001 break; 3002 } 3003 3004 /* 3005 * Build the directory record xdr from 3006 * the dirent entry. 3007 */ 3008 fp = (struct nfs_fattr *)&fl.fl_fattr; 3009 nfsm_srvfillattr(vap, fp); 3010 fl.fl_fhsize = txdr_unsigned(NFSX_V3FH); 3011 fl.fl_fhok = nfs_true; 3012 fl.fl_postopok = nfs_true; 3013 txdr_hyper(*cookiep, fl.fl_off.nfsuquad); 3014 3015 nfsm_clget; 3016 *tl = nfs_true; 3017 bp += NFSX_UNSIGNED; 3018 nfsm_clget; 3019 *tl = 0; 3020 bp += NFSX_UNSIGNED; 3021 nfsm_clget; 3022 *tl = txdr_unsigned(dp->d_fileno); 3023 bp += NFSX_UNSIGNED; 3024 nfsm_clget; 3025 *tl = txdr_unsigned(nlen); 3026 bp += NFSX_UNSIGNED; 3027 3028 /* And loop around copying the name */ 3029 xfer = nlen; 3030 cp = dp->d_name; 3031 while (xfer > 0) { 3032 nfsm_clget; 3033 if ((bp + xfer) > be) 3034 tsiz = be - bp; 3035 else 3036 tsiz = xfer; 3037 memcpy(bp, cp, tsiz); 3038 bp += tsiz; 3039 xfer -= tsiz; 3040 if (xfer > 0) 3041 cp += tsiz; 3042 } 3043 /* And null pad to an int32_t boundary */ 3044 for (i = 0; i < rem; i++) 3045 *bp++ = '\0'; 3046 3047 /* 3048 * Now copy the flrep structure out. 3049 */ 3050 xfer = sizeof (struct flrep); 3051 cp = (caddr_t)&fl; 3052 while (xfer > 0) { 3053 nfsm_clget; 3054 if ((bp + xfer) > be) 3055 tsiz = be - bp; 3056 else 3057 tsiz = xfer; 3058 memcpy(bp, cp, tsiz); 3059 bp += tsiz; 3060 xfer -= tsiz; 3061 if (xfer > 0) 3062 cp += tsiz; 3063 } 3064 } 3065 invalid: 3066 cpos += dp->d_reclen; 3067 dp = (struct dirent *)cpos; 3068 cookiep++; 3069 ncookies--; 3070 } 3071 vrele(vp); 3072 nfsm_clget; 3073 *tl = nfs_false; 3074 bp += NFSX_UNSIGNED; 3075 nfsm_clget; 3076 if (eofflag) 3077 *tl = nfs_true; 3078 else 3079 *tl = nfs_false; 3080 bp += NFSX_UNSIGNED; 3081 if (mp != mb) { 3082 if (bp < be) 3083 mp->m_len = bp - mtod(mp, caddr_t); 3084 } else 3085 mp->m_len += bp - bpos; 3086 free((caddr_t)cookies, M_TEMP); 3087 free((caddr_t)rbuf, M_TEMP); 3088 nfsm_srvdone; 3089 } 3090 3091 /* 3092 * nfs commit service 3093 */ 3094 int 3095 nfsrv_commit(nfsd, slp, procp, mrq) 3096 struct nfsrv_descript *nfsd; 3097 struct nfssvc_sock *slp; 3098 struct proc *procp; 3099 struct mbuf **mrq; 3100 { 3101 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3102 struct mbuf *nam = nfsd->nd_nam; 3103 caddr_t dpos = nfsd->nd_dpos; 3104 struct ucred *cred = &nfsd->nd_cr; 3105 struct vattr bfor, aft; 3106 struct vnode *vp; 3107 nfsfh_t nfh; 3108 fhandle_t *fhp; 3109 u_int32_t *tl; 3110 int32_t t1; 3111 caddr_t bpos; 3112 int error = 0, rdonly, for_ret = 1, aft_ret = 1, cnt, cache; 3113 char *cp2; 3114 struct mbuf *mb, *mreq; 3115 u_quad_t frev, off, end; 3116 3117 #ifndef nolint 3118 cache = 0; 3119 #endif 3120 fhp = &nfh.fh_generic; 3121 nfsm_srvmtofh(fhp); 3122 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 3123 3124 off = fxdr_hyper(tl); 3125 tl += 2; 3126 cnt = fxdr_unsigned(int, *tl); 3127 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 3128 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 3129 if (error) { 3130 nfsm_reply(2 * NFSX_UNSIGNED); 3131 nfsm_srvwcc_data(for_ret, &bfor, aft_ret, &aft); 3132 return (0); 3133 } 3134 for_ret = VOP_GETATTR(vp, &bfor, cred, procp); 3135 end = (cnt > 0) ? off + cnt : vp->v_size; 3136 if (end < off || end > vp->v_size) 3137 end = vp->v_size; 3138 error = VOP_FSYNC(vp, cred, FSYNC_WAIT, off, end, procp); 3139 aft_ret = VOP_GETATTR(vp, &aft, cred, procp); 3140 vput(vp); 3141 nfsm_reply(NFSX_V3WCCDATA + NFSX_V3WRITEVERF); 3142 nfsm_srvwcc_data(for_ret, &bfor, aft_ret, &aft); 3143 if (!error) { 3144 nfsm_build(tl, u_int32_t *, NFSX_V3WRITEVERF); 3145 *tl++ = txdr_unsigned(boottime.tv_sec); 3146 *tl = txdr_unsigned(boottime.tv_usec); 3147 } else 3148 return (0); 3149 nfsm_srvdone; 3150 } 3151 3152 /* 3153 * nfs statfs service 3154 */ 3155 int 3156 nfsrv_statfs(nfsd, slp, procp, mrq) 3157 struct nfsrv_descript *nfsd; 3158 struct nfssvc_sock *slp; 3159 struct proc *procp; 3160 struct mbuf **mrq; 3161 { 3162 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3163 struct mbuf *nam = nfsd->nd_nam; 3164 caddr_t dpos = nfsd->nd_dpos; 3165 struct ucred *cred = &nfsd->nd_cr; 3166 struct statfs *sf; 3167 struct nfs_statfs *sfp; 3168 u_int32_t *tl; 3169 int32_t t1; 3170 caddr_t bpos; 3171 int error = 0, rdonly, cache, getret = 1; 3172 int v3 = (nfsd->nd_flag & ND_NFSV3); 3173 char *cp2; 3174 struct mbuf *mb, *mreq; 3175 struct vnode *vp; 3176 struct vattr at; 3177 nfsfh_t nfh; 3178 fhandle_t *fhp; 3179 struct statfs statfs; 3180 u_quad_t frev, tval; 3181 3182 #ifndef nolint 3183 cache = 0; 3184 #endif 3185 fhp = &nfh.fh_generic; 3186 nfsm_srvmtofh(fhp); 3187 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 3188 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 3189 if (error) { 3190 nfsm_reply(NFSX_UNSIGNED); 3191 nfsm_srvpostop_attr(getret, &at); 3192 return (0); 3193 } 3194 sf = &statfs; 3195 error = VFS_STATFS(vp->v_mount, sf, procp); 3196 getret = VOP_GETATTR(vp, &at, cred, procp); 3197 vput(vp); 3198 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_STATFS(v3)); 3199 if (v3) 3200 nfsm_srvpostop_attr(getret, &at); 3201 if (error) 3202 return (0); 3203 nfsm_build(sfp, struct nfs_statfs *, NFSX_STATFS(v3)); 3204 if (v3) { 3205 tval = (u_quad_t)((quad_t)sf->f_blocks * (quad_t)sf->f_bsize); 3206 txdr_hyper(tval, &sfp->sf_tbytes); 3207 tval = (u_quad_t)((quad_t)sf->f_bfree * (quad_t)sf->f_bsize); 3208 txdr_hyper(tval, &sfp->sf_fbytes); 3209 tval = (u_quad_t)((quad_t)sf->f_bavail * (quad_t)sf->f_bsize); 3210 txdr_hyper(tval, &sfp->sf_abytes); 3211 tval = (u_quad_t)sf->f_files; 3212 txdr_hyper(tval, &sfp->sf_tfiles); 3213 tval = (u_quad_t)sf->f_ffree; 3214 txdr_hyper(tval, &sfp->sf_ffiles); 3215 txdr_hyper(tval, &sfp->sf_afiles); 3216 sfp->sf_invarsec = 0; 3217 } else { 3218 sfp->sf_tsize = txdr_unsigned(NFS_MAXDGRAMDATA); 3219 sfp->sf_bsize = txdr_unsigned(sf->f_bsize); 3220 sfp->sf_blocks = txdr_unsigned(sf->f_blocks); 3221 sfp->sf_bfree = txdr_unsigned(sf->f_bfree); 3222 sfp->sf_bavail = txdr_unsigned(sf->f_bavail); 3223 } 3224 nfsm_srvdone; 3225 } 3226 3227 /* 3228 * nfs fsinfo service 3229 */ 3230 int 3231 nfsrv_fsinfo(nfsd, slp, procp, mrq) 3232 struct nfsrv_descript *nfsd; 3233 struct nfssvc_sock *slp; 3234 struct proc *procp; 3235 struct mbuf **mrq; 3236 { 3237 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3238 struct mbuf *nam = nfsd->nd_nam; 3239 caddr_t dpos = nfsd->nd_dpos; 3240 struct ucred *cred = &nfsd->nd_cr; 3241 u_int32_t *tl; 3242 struct nfsv3_fsinfo *sip; 3243 int32_t t1; 3244 caddr_t bpos; 3245 int error = 0, rdonly, cache, getret = 1; 3246 uint32_t maxdata; 3247 char *cp2; 3248 struct mbuf *mb, *mreq; 3249 struct vnode *vp; 3250 struct vattr at; 3251 nfsfh_t nfh; 3252 fhandle_t *fhp; 3253 u_quad_t frev, maxfsize; 3254 struct statfs sb; 3255 3256 #ifndef nolint 3257 cache = 0; 3258 #endif 3259 fhp = &nfh.fh_generic; 3260 nfsm_srvmtofh(fhp); 3261 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 3262 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 3263 if (error) { 3264 nfsm_reply(NFSX_UNSIGNED); 3265 nfsm_srvpostop_attr(getret, &at); 3266 return (0); 3267 } 3268 3269 /* XXX Try to make a guess on the max file size. */ 3270 VFS_STATFS(vp->v_mount, &sb, (struct proc *)0); 3271 maxfsize = (u_quad_t)0x80000000 * sb.f_bsize - 1; 3272 3273 getret = VOP_GETATTR(vp, &at, cred, procp); 3274 vput(vp); 3275 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3FSINFO); 3276 nfsm_srvpostop_attr(getret, &at); 3277 nfsm_build(sip, struct nfsv3_fsinfo *, NFSX_V3FSINFO); 3278 3279 /* 3280 * XXX 3281 * There should be file system VFS OP(s) to get this information. 3282 * For now, assume ufs. 3283 */ 3284 if (slp->ns_so->so_type == SOCK_DGRAM) 3285 maxdata = NFS_MAXDGRAMDATA; 3286 else 3287 maxdata = NFS_MAXDATA; 3288 sip->fs_rtmax = txdr_unsigned(maxdata); 3289 sip->fs_rtpref = txdr_unsigned(maxdata); 3290 sip->fs_rtmult = txdr_unsigned(NFS_FABLKSIZE); 3291 sip->fs_wtmax = txdr_unsigned(maxdata); 3292 sip->fs_wtpref = txdr_unsigned(maxdata); 3293 sip->fs_wtmult = txdr_unsigned(NFS_FABLKSIZE); 3294 sip->fs_dtpref = txdr_unsigned(maxdata); 3295 txdr_hyper(maxfsize, &sip->fs_maxfilesize); 3296 sip->fs_timedelta.nfsv3_sec = 0; 3297 sip->fs_timedelta.nfsv3_nsec = txdr_unsigned(1); 3298 sip->fs_properties = txdr_unsigned(NFSV3FSINFO_LINK | 3299 NFSV3FSINFO_SYMLINK | NFSV3FSINFO_HOMOGENEOUS | 3300 NFSV3FSINFO_CANSETTIME); 3301 nfsm_srvdone; 3302 } 3303 3304 /* 3305 * nfs pathconf service 3306 */ 3307 int 3308 nfsrv_pathconf(nfsd, slp, procp, mrq) 3309 struct nfsrv_descript *nfsd; 3310 struct nfssvc_sock *slp; 3311 struct proc *procp; 3312 struct mbuf **mrq; 3313 { 3314 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3315 struct mbuf *nam = nfsd->nd_nam; 3316 caddr_t dpos = nfsd->nd_dpos; 3317 struct ucred *cred = &nfsd->nd_cr; 3318 u_int32_t *tl; 3319 struct nfsv3_pathconf *pc; 3320 int32_t t1; 3321 caddr_t bpos; 3322 int error = 0, rdonly, cache, getret = 1; 3323 register_t linkmax, namemax, chownres, notrunc; 3324 char *cp2; 3325 struct mbuf *mb, *mreq; 3326 struct vnode *vp; 3327 struct vattr at; 3328 nfsfh_t nfh; 3329 fhandle_t *fhp; 3330 u_quad_t frev; 3331 3332 #ifndef nolint 3333 cache = 0; 3334 #endif 3335 fhp = &nfh.fh_generic; 3336 nfsm_srvmtofh(fhp); 3337 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 3338 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 3339 if (error) { 3340 nfsm_reply(NFSX_UNSIGNED); 3341 nfsm_srvpostop_attr(getret, &at); 3342 return (0); 3343 } 3344 error = VOP_PATHCONF(vp, _PC_LINK_MAX, &linkmax); 3345 if (!error) 3346 error = VOP_PATHCONF(vp, _PC_NAME_MAX, &namemax); 3347 if (!error) 3348 error = VOP_PATHCONF(vp, _PC_CHOWN_RESTRICTED, &chownres); 3349 if (!error) 3350 error = VOP_PATHCONF(vp, _PC_NO_TRUNC, ¬runc); 3351 getret = VOP_GETATTR(vp, &at, cred, procp); 3352 vput(vp); 3353 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3PATHCONF); 3354 nfsm_srvpostop_attr(getret, &at); 3355 if (error) 3356 return (0); 3357 nfsm_build(pc, struct nfsv3_pathconf *, NFSX_V3PATHCONF); 3358 3359 pc->pc_linkmax = txdr_unsigned(linkmax); 3360 pc->pc_namemax = txdr_unsigned(namemax); 3361 pc->pc_notrunc = txdr_unsigned(notrunc); 3362 pc->pc_chownrestricted = txdr_unsigned(chownres); 3363 3364 /* 3365 * These should probably be supported by VOP_PATHCONF(), but 3366 * until msdosfs is exportable (why would you want to?), the 3367 * Unix defaults should be ok. 3368 */ 3369 pc->pc_caseinsensitive = nfs_false; 3370 pc->pc_casepreserving = nfs_true; 3371 nfsm_srvdone; 3372 } 3373 3374 /* 3375 * Null operation, used by clients to ping server 3376 */ 3377 /* ARGSUSED */ 3378 int 3379 nfsrv_null(nfsd, slp, procp, mrq) 3380 struct nfsrv_descript *nfsd; 3381 struct nfssvc_sock *slp; 3382 struct proc *procp; 3383 struct mbuf **mrq; 3384 { 3385 struct mbuf *mrep = nfsd->nd_mrep; 3386 caddr_t bpos; 3387 int error = NFSERR_RETVOID, cache = 0; 3388 struct mbuf *mb, *mreq; 3389 u_quad_t frev; 3390 3391 nfsm_reply(0); 3392 return (0); 3393 } 3394 3395 /* 3396 * No operation, used for obsolete procedures 3397 */ 3398 /* ARGSUSED */ 3399 int 3400 nfsrv_noop(nfsd, slp, procp, mrq) 3401 struct nfsrv_descript *nfsd; 3402 struct nfssvc_sock *slp; 3403 struct proc *procp; 3404 struct mbuf **mrq; 3405 { 3406 struct mbuf *mrep = nfsd->nd_mrep; 3407 caddr_t bpos; 3408 int error, cache = 0; 3409 struct mbuf *mb, *mreq; 3410 u_quad_t frev; 3411 3412 if (nfsd->nd_repstat) 3413 error = nfsd->nd_repstat; 3414 else 3415 error = EPROCUNAVAIL; 3416 nfsm_reply(0); 3417 return (0); 3418 } 3419 3420 /* 3421 * Perform access checking for vnodes obtained from file handles that would 3422 * refer to files already opened by a Unix client. You cannot just use 3423 * vn_writechk() and VOP_ACCESS() for two reasons. 3424 * 1 - You must check for exported rdonly as well as MNT_RDONLY for the write case 3425 * 2 - The owner is to be given access irrespective of mode bits for some 3426 * operations, so that processes that chmod after opening a file don't 3427 * break. I don't like this because it opens a security hole, but since 3428 * the nfs server opens a security hole the size of a barn door anyhow, 3429 * what the heck. 3430 * 3431 * The exception to rule 2 is EPERM. If a file is IMMUTABLE, VOP_ACCESS() 3432 * will return EPERM instead of EACCESS. EPERM is always an error. 3433 */ 3434 int 3435 nfsrv_access(vp, flags, cred, rdonly, p, override) 3436 struct vnode *vp; 3437 int flags; 3438 struct ucred *cred; 3439 int rdonly; 3440 struct proc *p; 3441 { 3442 struct vattr vattr; 3443 int error; 3444 if (flags & VWRITE) { 3445 /* Just vn_writechk() changed to check rdonly */ 3446 /* 3447 * Disallow write attempts on read-only file systems; 3448 * unless the file is a socket or a block or character 3449 * device resident on the file system. 3450 */ 3451 if (rdonly || (vp->v_mount->mnt_flag & MNT_RDONLY)) { 3452 switch (vp->v_type) { 3453 case VREG: 3454 case VDIR: 3455 case VLNK: 3456 return (EROFS); 3457 default: 3458 break; 3459 } 3460 } 3461 3462 /* 3463 * If the vnode is in use as a process's text, 3464 * we can't allow writing. 3465 */ 3466 if (vp->v_flag & VTEXT) 3467 return (ETXTBSY); 3468 } 3469 error = VOP_GETATTR(vp, &vattr, cred, p); 3470 if (error) 3471 return (error); 3472 error = VOP_ACCESS(vp, flags, cred, p); 3473 /* 3474 * Allow certain operations for the owner (reads and writes 3475 * on files that are already open). 3476 */ 3477 if (override && error == EACCES && cred->cr_uid == vattr.va_uid) 3478 error = 0; 3479 return error; 3480 } 3481
Indexes created Sun Sep 21 20:09:37 GMT 2025