nfs_serv.c revision 1.70
1 /* $NetBSD: nfs_serv.c,v 1.70 2003/04/02 15:14:20 yamt 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 1.70 2003/04/02 15:14:20 yamt 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_extern.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 98 /* 99 * nfs v3 access service 100 */ 101 int 102 nfsrv3_access(nfsd, slp, procp, mrq) 103 struct nfsrv_descript *nfsd; 104 struct nfssvc_sock *slp; 105 struct proc *procp; 106 struct mbuf **mrq; 107 { 108 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 109 struct mbuf *nam = nfsd->nd_nam; 110 caddr_t dpos = nfsd->nd_dpos; 111 struct ucred *cred = &nfsd->nd_cr; 112 struct vnode *vp; 113 nfsfh_t nfh; 114 fhandle_t *fhp; 115 u_int32_t *tl; 116 int32_t t1; 117 caddr_t bpos; 118 int error = 0, rdonly, cache = 0, getret; 119 char *cp2; 120 struct mbuf *mb, *mreq; 121 struct vattr va; 122 u_long inmode, testmode, outmode; 123 u_quad_t frev; 124 125 fhp = &nfh.fh_generic; 126 nfsm_srvmtofh(fhp); 127 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 128 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, &rdonly, 129 (nfsd->nd_flag & ND_KERBAUTH), FALSE); 130 if (error) { 131 nfsm_reply(NFSX_UNSIGNED); 132 nfsm_srvpostop_attr(1, (struct vattr *)0); 133 return (0); 134 } 135 inmode = fxdr_unsigned(u_int32_t, *tl); 136 outmode = 0; 137 if ((inmode & NFSV3ACCESS_READ) && 138 nfsrv_access(vp, VREAD, cred, rdonly, procp, 0) == 0) 139 outmode |= NFSV3ACCESS_READ; 140 if (vp->v_type != VDIR) { 141 testmode = inmode & (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND); 142 if (testmode && 143 nfsrv_access(vp, VWRITE, cred, rdonly, procp, 0) == 0) 144 outmode |= testmode; 145 if ((inmode & NFSV3ACCESS_EXECUTE) && 146 nfsrv_access(vp, VEXEC, cred, rdonly, procp, 0) == 0) 147 outmode |= NFSV3ACCESS_EXECUTE; 148 } else { 149 testmode = inmode & (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | 150 NFSV3ACCESS_DELETE); 151 if (testmode && 152 nfsrv_access(vp, VWRITE, cred, rdonly, procp, 0) == 0) 153 outmode |= testmode; 154 if ((inmode & NFSV3ACCESS_LOOKUP) && 155 nfsrv_access(vp, VEXEC, cred, rdonly, procp, 0) == 0) 156 outmode |= NFSV3ACCESS_LOOKUP; 157 } 158 getret = VOP_GETATTR(vp, &va, cred, procp); 159 vput(vp); 160 nfsm_reply(NFSX_POSTOPATTR(1) + NFSX_UNSIGNED); 161 nfsm_srvpostop_attr(getret, &va); 162 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 163 *tl = txdr_unsigned(outmode); 164 nfsm_srvdone; 165 } 166 167 /* 168 * nfs getattr service 169 */ 170 int 171 nfsrv_getattr(nfsd, slp, procp, mrq) 172 struct nfsrv_descript *nfsd; 173 struct nfssvc_sock *slp; 174 struct proc *procp; 175 struct mbuf **mrq; 176 { 177 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 178 struct mbuf *nam = nfsd->nd_nam; 179 caddr_t dpos = nfsd->nd_dpos; 180 struct ucred *cred = &nfsd->nd_cr; 181 struct nfs_fattr *fp; 182 struct vattr va; 183 struct vnode *vp; 184 nfsfh_t nfh; 185 fhandle_t *fhp; 186 u_int32_t *tl; 187 int32_t t1; 188 caddr_t bpos; 189 int error = 0, rdonly, cache; 190 char *cp2; 191 struct mbuf *mb, *mreq; 192 u_quad_t frev; 193 194 fhp = &nfh.fh_generic; 195 nfsm_srvmtofh(fhp); 196 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, &rdonly, 197 (nfsd->nd_flag & ND_KERBAUTH), FALSE); 198 if (error) { 199 nfsm_reply(0); 200 return (0); 201 } 202 nqsrv_getl(vp, ND_READ); 203 error = VOP_GETATTR(vp, &va, cred, procp); 204 vput(vp); 205 nfsm_reply(NFSX_FATTR(nfsd->nd_flag & ND_NFSV3)); 206 if (error) 207 return (0); 208 nfsm_build(fp, struct nfs_fattr *, NFSX_FATTR(nfsd->nd_flag & ND_NFSV3)); 209 nfsm_srvfillattr(&va, fp); 210 nfsm_srvdone; 211 } 212 213 /* 214 * nfs setattr service 215 */ 216 int 217 nfsrv_setattr(nfsd, slp, procp, mrq) 218 struct nfsrv_descript *nfsd; 219 struct nfssvc_sock *slp; 220 struct proc *procp; 221 struct mbuf **mrq; 222 { 223 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 224 struct mbuf *nam = nfsd->nd_nam; 225 caddr_t dpos = nfsd->nd_dpos; 226 struct ucred *cred = &nfsd->nd_cr; 227 struct vattr va, preat; 228 struct nfsv2_sattr *sp; 229 struct nfs_fattr *fp; 230 struct vnode *vp; 231 nfsfh_t nfh; 232 fhandle_t *fhp; 233 u_int32_t *tl; 234 int32_t t1; 235 caddr_t bpos; 236 int error = 0, rdonly, cache, preat_ret = 1, postat_ret = 1; 237 int v3 = (nfsd->nd_flag & ND_NFSV3), gcheck = 0; 238 char *cp2; 239 struct mbuf *mb, *mreq; 240 u_quad_t frev; 241 struct timespec guard; 242 243 fhp = &nfh.fh_generic; 244 nfsm_srvmtofh(fhp); 245 VATTR_NULL(&va); 246 if (v3) { 247 nfsm_srvsattr(&va); 248 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 249 gcheck = fxdr_unsigned(int, *tl); 250 if (gcheck) { 251 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 252 fxdr_nfsv3time(tl, &guard); 253 } 254 } else { 255 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 256 /* 257 * Nah nah nah nah na nah 258 * There is a bug in the Sun client that puts 0xffff in the mode 259 * field of sattr when it should put in 0xffffffff. The u_short 260 * doesn't sign extend. 261 * --> check the low order 2 bytes for 0xffff 262 */ 263 if ((fxdr_unsigned(int, sp->sa_mode) & 0xffff) != 0xffff) 264 va.va_mode = nfstov_mode(sp->sa_mode); 265 if (sp->sa_uid != nfs_xdrneg1) 266 va.va_uid = fxdr_unsigned(uid_t, sp->sa_uid); 267 if (sp->sa_gid != nfs_xdrneg1) 268 va.va_gid = fxdr_unsigned(gid_t, sp->sa_gid); 269 if (sp->sa_size != nfs_xdrneg1) 270 va.va_size = fxdr_unsigned(u_quad_t, sp->sa_size); 271 if (sp->sa_atime.nfsv2_sec != nfs_xdrneg1) { 272 #ifdef notyet 273 fxdr_nfsv2time(&sp->sa_atime, &va.va_atime); 274 #else 275 va.va_atime.tv_sec = 276 fxdr_unsigned(u_int32_t,sp->sa_atime.nfsv2_sec); 277 va.va_atime.tv_nsec = 0; 278 #endif 279 } 280 if (sp->sa_mtime.nfsv2_sec != nfs_xdrneg1) 281 fxdr_nfsv2time(&sp->sa_mtime, &va.va_mtime); 282 283 } 284 285 /* 286 * Now that we have all the fields, lets do it. 287 */ 288 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, &rdonly, 289 (nfsd->nd_flag & ND_KERBAUTH), FALSE); 290 if (error) { 291 nfsm_reply(2 * NFSX_UNSIGNED); 292 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 293 return (0); 294 } 295 nqsrv_getl(vp, ND_WRITE); 296 if (v3) { 297 error = preat_ret = VOP_GETATTR(vp, &preat, cred, procp); 298 if (!error && gcheck && 299 (preat.va_ctime.tv_sec != guard.tv_sec || 300 preat.va_ctime.tv_nsec != guard.tv_nsec)) 301 error = NFSERR_NOT_SYNC; 302 if (error) { 303 vput(vp); 304 nfsm_reply(NFSX_WCCDATA(v3)); 305 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 306 return (0); 307 } 308 } 309 310 /* 311 * If the size is being changed write acces is required, otherwise 312 * just check for a read only file system. 313 */ 314 if (va.va_size == ((u_quad_t)((quad_t) -1))) { 315 if (rdonly || (vp->v_mount->mnt_flag & MNT_RDONLY)) { 316 error = EROFS; 317 goto out; 318 } 319 } else { 320 if (vp->v_type == VDIR) { 321 error = EISDIR; 322 goto out; 323 } else if ((error = nfsrv_access(vp, VWRITE, cred, rdonly, 324 procp, 0)) != 0) 325 goto out; 326 } 327 error = VOP_SETATTR(vp, &va, cred, procp); 328 postat_ret = VOP_GETATTR(vp, &va, cred, procp); 329 if (!error) 330 error = postat_ret; 331 out: 332 vput(vp); 333 nfsm_reply(NFSX_WCCORFATTR(v3)); 334 if (v3) { 335 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 336 return (0); 337 } else { 338 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 339 nfsm_srvfillattr(&va, fp); 340 } 341 nfsm_srvdone; 342 } 343 344 /* 345 * nfs lookup rpc 346 */ 347 int 348 nfsrv_lookup(nfsd, slp, procp, mrq) 349 struct nfsrv_descript *nfsd; 350 struct nfssvc_sock *slp; 351 struct proc *procp; 352 struct mbuf **mrq; 353 { 354 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 355 struct mbuf *nam = nfsd->nd_nam; 356 caddr_t dpos = nfsd->nd_dpos; 357 struct ucred *cred = &nfsd->nd_cr; 358 struct nfs_fattr *fp; 359 struct nameidata nd, ind, *ndp = &nd; 360 struct vnode *vp, *dirp; 361 nfsfh_t nfh; 362 fhandle_t *fhp; 363 caddr_t cp; 364 u_int32_t *tl; 365 int32_t t1; 366 caddr_t bpos; 367 int error = 0, cache, dirattr_ret = 1; 368 uint32_t len; 369 int v3 = (nfsd->nd_flag & ND_NFSV3), pubflag; 370 char *cp2; 371 struct mbuf *mb, *mreq; 372 struct vattr va, dirattr; 373 u_quad_t frev; 374 375 fhp = &nfh.fh_generic; 376 nfsm_srvmtofh(fhp); 377 nfsm_srvnamesiz(len); 378 379 pubflag = nfs_ispublicfh(fhp); 380 381 nd.ni_cnd.cn_cred = cred; 382 nd.ni_cnd.cn_nameiop = LOOKUP; 383 nd.ni_cnd.cn_flags = LOCKLEAF | SAVESTART; 384 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 385 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), pubflag); 386 387 if (!error && pubflag) { 388 if (nd.ni_vp->v_type == VDIR && nfs_pub.np_index != NULL) { 389 /* 390 * Setup call to lookup() to see if we can find 391 * the index file. Arguably, this doesn't belong 392 * in a kernel.. Ugh. 393 */ 394 ind = nd; 395 VOP_UNLOCK(nd.ni_vp, 0); 396 ind.ni_pathlen = strlen(nfs_pub.np_index); 397 ind.ni_cnd.cn_nameptr = ind.ni_cnd.cn_pnbuf = 398 nfs_pub.np_index; 399 ind.ni_startdir = nd.ni_vp; 400 VREF(ind.ni_startdir); 401 error = lookup(&ind); 402 if (!error) { 403 /* 404 * Found an index file. Get rid of 405 * the old references. 406 */ 407 if (dirp) 408 vrele(dirp); 409 dirp = nd.ni_vp; 410 vrele(nd.ni_startdir); 411 ndp = &ind; 412 } else 413 error = 0; 414 } 415 /* 416 * If the public filehandle was used, check that this lookup 417 * didn't result in a filehandle outside the publicly exported 418 * filesystem. 419 */ 420 421 if (!error && ndp->ni_vp->v_mount != nfs_pub.np_mount) { 422 vput(nd.ni_vp); 423 error = EPERM; 424 } 425 } 426 427 if (dirp) { 428 if (v3) 429 dirattr_ret = VOP_GETATTR(dirp, &dirattr, cred, 430 procp); 431 vrele(dirp); 432 } 433 434 if (error) { 435 nfsm_reply(NFSX_POSTOPATTR(v3)); 436 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 437 return (0); 438 } 439 440 nqsrv_getl(ndp->ni_startdir, ND_READ); 441 vrele(ndp->ni_startdir); 442 PNBUF_PUT(nd.ni_cnd.cn_pnbuf); 443 vp = ndp->ni_vp; 444 memset((caddr_t)fhp, 0, sizeof(nfh)); 445 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; 446 error = VFS_VPTOFH(vp, &fhp->fh_fid); 447 if (!error) 448 error = VOP_GETATTR(vp, &va, cred, procp); 449 vput(vp); 450 nfsm_reply(NFSX_SRVFH(v3) + NFSX_POSTOPORFATTR(v3) + NFSX_POSTOPATTR(v3)); 451 if (error) { 452 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 453 return (0); 454 } 455 nfsm_srvfhtom(fhp, v3); 456 if (v3) { 457 nfsm_srvpostop_attr(0, &va); 458 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 459 } else { 460 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 461 nfsm_srvfillattr(&va, fp); 462 } 463 nfsm_srvdone; 464 } 465 466 /* 467 * nfs readlink service 468 */ 469 int 470 nfsrv_readlink(nfsd, slp, procp, mrq) 471 struct nfsrv_descript *nfsd; 472 struct nfssvc_sock *slp; 473 struct proc *procp; 474 struct mbuf **mrq; 475 { 476 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 477 struct mbuf *nam = nfsd->nd_nam; 478 caddr_t dpos = nfsd->nd_dpos; 479 struct ucred *cred = &nfsd->nd_cr; 480 struct iovec iv[(NFS_MAXPATHLEN+MLEN-1)/MLEN]; 481 struct iovec *ivp = iv; 482 struct mbuf *mp; 483 u_int32_t *tl; 484 int32_t t1; 485 caddr_t bpos; 486 int error = 0, rdonly, cache, i, tlen, len, getret; 487 int v3 = (nfsd->nd_flag & ND_NFSV3); 488 char *cp2; 489 struct mbuf *mb, *mp2 = NULL, *mp3 = NULL, *mreq; 490 struct vnode *vp; 491 struct vattr attr; 492 nfsfh_t nfh; 493 fhandle_t *fhp; 494 struct uio io, *uiop = &io; 495 u_quad_t frev; 496 497 fhp = &nfh.fh_generic; 498 nfsm_srvmtofh(fhp); 499 len = 0; 500 i = 0; 501 while (len < NFS_MAXPATHLEN) { 502 mp = m_get(M_WAIT, MT_DATA); 503 MCLAIM(mp, &nfs_mowner); 504 m_clget(mp, M_WAIT); 505 mp->m_len = NFSMSIZ(mp); 506 if (len == 0) 507 mp3 = mp2 = mp; 508 else { 509 mp2->m_next = mp; 510 mp2 = mp; 511 } 512 if ((len+mp->m_len) > NFS_MAXPATHLEN) { 513 mp->m_len = NFS_MAXPATHLEN-len; 514 len = NFS_MAXPATHLEN; 515 } else 516 len += mp->m_len; 517 ivp->iov_base = mtod(mp, caddr_t); 518 ivp->iov_len = mp->m_len; 519 i++; 520 ivp++; 521 } 522 uiop->uio_iov = iv; 523 uiop->uio_iovcnt = i; 524 uiop->uio_offset = 0; 525 uiop->uio_resid = len; 526 uiop->uio_rw = UIO_READ; 527 uiop->uio_segflg = UIO_SYSSPACE; 528 uiop->uio_procp = (struct proc *)0; 529 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 530 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 531 if (error) { 532 m_freem(mp3); 533 nfsm_reply(2 * NFSX_UNSIGNED); 534 nfsm_srvpostop_attr(1, (struct vattr *)0); 535 return (0); 536 } 537 if (vp->v_type != VLNK) { 538 if (v3) 539 error = EINVAL; 540 else 541 error = ENXIO; 542 goto out; 543 } 544 nqsrv_getl(vp, ND_READ); 545 error = VOP_READLINK(vp, uiop, cred); 546 out: 547 getret = VOP_GETATTR(vp, &attr, cred, procp); 548 vput(vp); 549 if (error) 550 m_freem(mp3); 551 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_UNSIGNED); 552 if (v3) { 553 nfsm_srvpostop_attr(getret, &attr); 554 if (error) 555 return (0); 556 } 557 if (uiop->uio_resid > 0) { 558 len -= uiop->uio_resid; 559 tlen = nfsm_rndup(len); 560 nfsm_adj(mp3, NFS_MAXPATHLEN-tlen, tlen-len); 561 } 562 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 563 *tl = txdr_unsigned(len); 564 mb->m_next = mp3; 565 nfsm_srvdone; 566 } 567 568 /* 569 * nfs read service 570 */ 571 int 572 nfsrv_read(nfsd, slp, procp, mrq) 573 struct nfsrv_descript *nfsd; 574 struct nfssvc_sock *slp; 575 struct proc *procp; 576 struct mbuf **mrq; 577 { 578 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 579 struct mbuf *nam = nfsd->nd_nam; 580 caddr_t dpos = nfsd->nd_dpos; 581 struct ucred *cred = &nfsd->nd_cr; 582 struct iovec *iv; 583 struct iovec *iv2; 584 struct mbuf *m; 585 struct nfs_fattr *fp; 586 u_int32_t *tl; 587 int32_t t1; 588 int i; 589 caddr_t bpos; 590 int error = 0, rdonly, cache, cnt, len, left, siz, tlen, getret; 591 int v3 = (nfsd->nd_flag & ND_NFSV3); 592 uint32_t reqlen; 593 char *cp2; 594 struct mbuf *mb, *mreq; 595 struct mbuf *m2; 596 struct vnode *vp; 597 nfsfh_t nfh; 598 fhandle_t *fhp; 599 struct uio io, *uiop = &io; 600 struct vattr va; 601 off_t off; 602 u_quad_t frev; 603 604 fhp = &nfh.fh_generic; 605 nfsm_srvmtofh(fhp); 606 if (v3) { 607 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 608 off = fxdr_hyper(tl); 609 } else { 610 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 611 off = (off_t)fxdr_unsigned(u_int32_t, *tl); 612 } 613 nfsm_srvstrsiz(reqlen, NFS_SRVMAXDATA(nfsd)); 614 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 615 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 616 if (error) { 617 nfsm_reply(2 * NFSX_UNSIGNED); 618 nfsm_srvpostop_attr(1, (struct vattr *)0); 619 return (0); 620 } 621 if (vp->v_type != VREG) { 622 if (v3) 623 error = EINVAL; 624 else 625 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 626 } 627 if (!error) { 628 nqsrv_getl(vp, ND_READ); 629 if ((error = nfsrv_access(vp, VREAD, cred, rdonly, procp, 1)) != 0) 630 error = nfsrv_access(vp, VEXEC, cred, rdonly, procp, 1); 631 } 632 getret = VOP_GETATTR(vp, &va, cred, procp); 633 if (!error) 634 error = getret; 635 if (error) { 636 vput(vp); 637 nfsm_reply(NFSX_POSTOPATTR(v3)); 638 nfsm_srvpostop_attr(getret, &va); 639 return (0); 640 } 641 if (off >= va.va_size) 642 cnt = 0; 643 else if ((off + reqlen) > va.va_size) 644 cnt = nfsm_rndup(va.va_size - off); 645 else 646 cnt = reqlen; 647 nfsm_reply(NFSX_POSTOPORFATTR(v3) + 3 * NFSX_UNSIGNED+nfsm_rndup(cnt)); 648 if (v3) { 649 nfsm_build(tl, u_int32_t *, NFSX_V3FATTR + 4 * NFSX_UNSIGNED); 650 *tl++ = nfs_true; 651 fp = (struct nfs_fattr *)tl; 652 tl += (NFSX_V3FATTR / sizeof (u_int32_t)); 653 } else { 654 nfsm_build(tl, u_int32_t *, NFSX_V2FATTR + NFSX_UNSIGNED); 655 fp = (struct nfs_fattr *)tl; 656 tl += (NFSX_V2FATTR / sizeof (u_int32_t)); 657 } 658 len = left = cnt; 659 if (cnt > 0) { 660 /* 661 * Generate the mbuf list with the uio_iov ref. to it. 662 */ 663 i = 0; 664 m = m2 = mb; 665 while (left > 0) { 666 siz = min(M_TRAILINGSPACE(m), left); 667 if (siz > 0) { 668 left -= siz; 669 i++; 670 } 671 if (left > 0) { 672 m = m_get(M_WAIT, MT_DATA); 673 MCLAIM(m, &nfs_mowner); 674 m_clget(m, M_WAIT); 675 m->m_len = 0; 676 m2->m_next = m; 677 m2 = m; 678 } 679 } 680 iv = malloc(i * sizeof (struct iovec), M_TEMP, M_WAITOK); 681 uiop->uio_iov = iv2 = iv; 682 m = mb; 683 left = cnt; 684 i = 0; 685 while (left > 0) { 686 if (m == NULL) 687 panic("nfsrv_read iov"); 688 siz = min(M_TRAILINGSPACE(m), left); 689 if (siz > 0) { 690 iv->iov_base = mtod(m, caddr_t) + m->m_len; 691 iv->iov_len = siz; 692 m->m_len += siz; 693 left -= siz; 694 iv++; 695 i++; 696 } 697 m = m->m_next; 698 } 699 uiop->uio_iovcnt = i; 700 uiop->uio_offset = off; 701 uiop->uio_resid = cnt; 702 uiop->uio_rw = UIO_READ; 703 uiop->uio_segflg = UIO_SYSSPACE; 704 error = VOP_READ(vp, uiop, IO_NODELOCKED, cred); 705 off = uiop->uio_offset; 706 free((caddr_t)iv2, M_TEMP); 707 if (error || (getret = VOP_GETATTR(vp, &va, cred, procp)) != 0){ 708 if (!error) 709 error = getret; 710 m_freem(mreq); 711 vput(vp); 712 nfsm_reply(NFSX_POSTOPATTR(v3)); 713 nfsm_srvpostop_attr(getret, &va); 714 return (0); 715 } 716 } else 717 uiop->uio_resid = 0; 718 vput(vp); 719 nfsm_srvfillattr(&va, fp); 720 len -= uiop->uio_resid; 721 tlen = nfsm_rndup(len); 722 if (cnt != tlen || tlen != len) 723 nfsm_adj(mb, cnt - tlen, tlen - len); 724 if (v3) { 725 *tl++ = txdr_unsigned(len); 726 if (len < reqlen) 727 *tl++ = nfs_true; 728 else 729 *tl++ = nfs_false; 730 } 731 *tl = txdr_unsigned(len); 732 nfsm_srvdone; 733 } 734 735 /* 736 * nfs write service 737 */ 738 int 739 nfsrv_write(nfsd, slp, procp, mrq) 740 struct nfsrv_descript *nfsd; 741 struct nfssvc_sock *slp; 742 struct proc *procp; 743 struct mbuf **mrq; 744 { 745 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 746 struct mbuf *nam = nfsd->nd_nam; 747 caddr_t dpos = nfsd->nd_dpos; 748 struct ucred *cred = &nfsd->nd_cr; 749 struct iovec *ivp; 750 int i, cnt; 751 struct mbuf *mp; 752 struct nfs_fattr *fp; 753 struct iovec *iv; 754 struct vattr va, forat; 755 u_int32_t *tl; 756 int32_t t1; 757 caddr_t bpos; 758 int error = 0, rdonly, cache, len, forat_ret = 1; 759 int ioflags, aftat_ret = 1, retlen, zeroing, adjust; 760 int stable = NFSV3WRITE_FILESYNC; 761 int v3 = (nfsd->nd_flag & ND_NFSV3); 762 char *cp2; 763 struct mbuf *mb, *mreq; 764 struct vnode *vp; 765 nfsfh_t nfh; 766 fhandle_t *fhp; 767 struct uio io, *uiop = &io; 768 off_t off; 769 u_quad_t frev; 770 771 if (mrep == NULL) { 772 *mrq = NULL; 773 return (0); 774 } 775 fhp = &nfh.fh_generic; 776 nfsm_srvmtofh(fhp); 777 if (v3) { 778 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 779 off = fxdr_hyper(tl); 780 tl += 3; 781 stable = fxdr_unsigned(int, *tl++); 782 } else { 783 nfsm_dissect(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 784 off = (off_t)fxdr_unsigned(u_int32_t, *++tl); 785 tl += 2; 786 } 787 retlen = len = fxdr_unsigned(int32_t, *tl); 788 cnt = i = 0; 789 790 /* 791 * For NFS Version 2, it is not obvious what a write of zero length 792 * should do, but I might as well be consistent with Version 3, 793 * which is to return ok so long as there are no permission problems. 794 */ 795 if (len > 0) { 796 zeroing = 1; 797 mp = mrep; 798 while (mp) { 799 if (mp == md) { 800 zeroing = 0; 801 adjust = dpos - mtod(mp, caddr_t); 802 mp->m_len -= adjust; 803 if (mp->m_len > 0 && adjust > 0) 804 NFSMADV(mp, adjust); 805 } 806 if (zeroing) 807 mp->m_len = 0; 808 else if (mp->m_len > 0) { 809 i += mp->m_len; 810 if (i > len) { 811 mp->m_len -= (i - len); 812 zeroing = 1; 813 } 814 if (mp->m_len > 0) 815 cnt++; 816 } 817 mp = mp->m_next; 818 } 819 } 820 if (len > NFS_MAXDATA || len < 0 || i < len) { 821 error = EIO; 822 nfsm_reply(2 * NFSX_UNSIGNED); 823 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 824 return (0); 825 } 826 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 827 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 828 if (error) { 829 nfsm_reply(2 * NFSX_UNSIGNED); 830 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 831 return (0); 832 } 833 if (v3) 834 forat_ret = VOP_GETATTR(vp, &forat, cred, procp); 835 if (vp->v_type != VREG) { 836 if (v3) 837 error = EINVAL; 838 else 839 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 840 } 841 if (!error) { 842 nqsrv_getl(vp, ND_WRITE); 843 error = nfsrv_access(vp, VWRITE, cred, rdonly, procp, 1); 844 } 845 if (error) { 846 vput(vp); 847 nfsm_reply(NFSX_WCCDATA(v3)); 848 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 849 return (0); 850 } 851 852 if (len > 0) { 853 ivp = malloc(cnt * sizeof (struct iovec), M_TEMP, M_WAITOK); 854 uiop->uio_iov = iv = ivp; 855 uiop->uio_iovcnt = cnt; 856 mp = mrep; 857 while (mp) { 858 if (mp->m_len > 0) { 859 ivp->iov_base = mtod(mp, caddr_t); 860 ivp->iov_len = mp->m_len; 861 ivp++; 862 } 863 mp = mp->m_next; 864 } 865 866 /* 867 * XXX 868 * The IO_METASYNC flag indicates that all metadata (and not just 869 * enough to ensure data integrity) mus be written to stable storage 870 * synchronously. 871 * (IO_METASYNC is not yet implemented in 4.4BSD-Lite.) 872 */ 873 if (stable == NFSV3WRITE_UNSTABLE) 874 ioflags = IO_NODELOCKED; 875 else if (stable == NFSV3WRITE_DATASYNC) 876 ioflags = (IO_SYNC | IO_NODELOCKED); 877 else 878 ioflags = (IO_METASYNC | IO_SYNC | IO_NODELOCKED); 879 uiop->uio_resid = len; 880 uiop->uio_rw = UIO_WRITE; 881 uiop->uio_segflg = UIO_SYSSPACE; 882 uiop->uio_procp = (struct proc *)0; 883 uiop->uio_offset = off; 884 error = VOP_WRITE(vp, uiop, ioflags, cred); 885 nfsstats.srvvop_writes++; 886 free((caddr_t)iv, M_TEMP); 887 } 888 aftat_ret = VOP_GETATTR(vp, &va, cred, procp); 889 vput(vp); 890 if (!error) 891 error = aftat_ret; 892 nfsm_reply(NFSX_PREOPATTR(v3) + NFSX_POSTOPORFATTR(v3) + 893 2 * NFSX_UNSIGNED + NFSX_WRITEVERF(v3)); 894 if (v3) { 895 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 896 if (error) 897 return (0); 898 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 899 *tl++ = txdr_unsigned(retlen); 900 if (stable == NFSV3WRITE_UNSTABLE) 901 *tl++ = txdr_unsigned(stable); 902 else 903 *tl++ = txdr_unsigned(NFSV3WRITE_FILESYNC); 904 /* 905 * Actually, there is no need to txdr these fields, 906 * but it may make the values more human readable, 907 * for debugging purposes. 908 */ 909 *tl++ = txdr_unsigned(boottime.tv_sec); 910 *tl = txdr_unsigned(boottime.tv_usec); 911 } else { 912 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 913 nfsm_srvfillattr(&va, fp); 914 } 915 nfsm_srvdone; 916 } 917 918 /* 919 * NFS write service with write gathering support. Called when 920 * nfsrvw_procrastinate > 0. 921 * See: Chet Juszczak, "Improving the Write Performance of an NFS Server", 922 * in Proc. of the Winter 1994 Usenix Conference, pg. 247-259, San Franscisco, 923 * Jan. 1994. 924 */ 925 int 926 nfsrv_writegather(ndp, slp, procp, mrq) 927 struct nfsrv_descript **ndp; 928 struct nfssvc_sock *slp; 929 struct proc *procp; 930 struct mbuf **mrq; 931 { 932 struct iovec *ivp; 933 struct mbuf *mp; 934 struct nfsrv_descript *wp, *nfsd, *owp, *swp; 935 struct nfs_fattr *fp; 936 int i = 0; 937 struct iovec *iov; 938 struct nfsrvw_delayhash *wpp; 939 struct ucred *cred; 940 struct vattr va, forat; 941 u_int32_t *tl; 942 int32_t t1; 943 caddr_t bpos, dpos; 944 int error = 0, rdonly, cache, len = 0, forat_ret = 1; 945 int ioflags, aftat_ret = 1, s, adjust, v3, zeroing; 946 char *cp2; 947 struct mbuf *mb, *mreq, *mrep, *md; 948 struct vnode *vp; 949 struct uio io, *uiop = &io; 950 u_quad_t frev, cur_usec; 951 952 *mrq = NULL; 953 if (*ndp) { 954 nfsd = *ndp; 955 *ndp = NULL; 956 mrep = nfsd->nd_mrep; 957 md = nfsd->nd_md; 958 dpos = nfsd->nd_dpos; 959 cred = &nfsd->nd_cr; 960 v3 = (nfsd->nd_flag & ND_NFSV3); 961 LIST_INIT(&nfsd->nd_coalesce); 962 nfsd->nd_mreq = NULL; 963 nfsd->nd_stable = NFSV3WRITE_FILESYNC; 964 cur_usec = (u_quad_t)time.tv_sec * 1000000 + (u_quad_t)time.tv_usec; 965 nfsd->nd_time = cur_usec + nfsrvw_procrastinate; 966 967 /* 968 * Now, get the write header.. 969 */ 970 nfsm_srvmtofh(&nfsd->nd_fh); 971 if (v3) { 972 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 973 nfsd->nd_off = fxdr_hyper(tl); 974 tl += 3; 975 nfsd->nd_stable = fxdr_unsigned(int, *tl++); 976 } else { 977 nfsm_dissect(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 978 nfsd->nd_off = (off_t)fxdr_unsigned(u_int32_t, *++tl); 979 tl += 2; 980 } 981 len = fxdr_unsigned(int32_t, *tl); 982 nfsd->nd_len = len; 983 nfsd->nd_eoff = nfsd->nd_off + len; 984 985 /* 986 * Trim the header out of the mbuf list and trim off any trailing 987 * junk so that the mbuf list has only the write data. 988 */ 989 zeroing = 1; 990 i = 0; 991 mp = mrep; 992 while (mp) { 993 if (mp == md) { 994 zeroing = 0; 995 adjust = dpos - mtod(mp, caddr_t); 996 mp->m_len -= adjust; 997 if (mp->m_len > 0 && adjust > 0) 998 NFSMADV(mp, adjust); 999 } 1000 if (zeroing) 1001 mp->m_len = 0; 1002 else { 1003 i += mp->m_len; 1004 if (i > len) { 1005 mp->m_len -= (i - len); 1006 zeroing = 1; 1007 } 1008 } 1009 mp = mp->m_next; 1010 } 1011 if (len > NFS_MAXDATA || len < 0 || i < len) { 1012 nfsmout: 1013 m_freem(mrep); 1014 error = EIO; 1015 nfsm_writereply(2 * NFSX_UNSIGNED, v3); 1016 if (v3) 1017 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1018 nfsd->nd_mreq = mreq; 1019 nfsd->nd_mrep = NULL; 1020 nfsd->nd_time = 0; 1021 } 1022 1023 /* 1024 * Add this entry to the hash and time queues. 1025 */ 1026 s = splsoftclock(); 1027 owp = NULL; 1028 wp = LIST_FIRST(&slp->ns_tq); 1029 while (wp && wp->nd_time < nfsd->nd_time) { 1030 owp = wp; 1031 wp = LIST_NEXT(wp, nd_tq); 1032 } 1033 if (owp) { 1034 LIST_INSERT_AFTER(owp, nfsd, nd_tq); 1035 } else { 1036 LIST_INSERT_HEAD(&slp->ns_tq, nfsd, nd_tq); 1037 } 1038 if (nfsd->nd_mrep) { 1039 wpp = NWDELAYHASH(slp, nfsd->nd_fh.fh_fid.fid_data); 1040 owp = NULL; 1041 wp = LIST_FIRST(wpp); 1042 while (wp && 1043 memcmp((caddr_t)&nfsd->nd_fh, (caddr_t)&wp->nd_fh, NFSX_V3FH)) { 1044 owp = wp; 1045 wp = LIST_NEXT(wp, nd_hash); 1046 } 1047 while (wp && wp->nd_off < nfsd->nd_off && 1048 !memcmp((caddr_t)&nfsd->nd_fh, (caddr_t)&wp->nd_fh, NFSX_V3FH)) { 1049 owp = wp; 1050 wp = LIST_NEXT(wp, nd_hash); 1051 } 1052 if (owp) { 1053 LIST_INSERT_AFTER(owp, nfsd, nd_hash); 1054 1055 /* 1056 * Search the hash list for overlapping entries and 1057 * coalesce. 1058 */ 1059 for(; nfsd && NFSW_CONTIG(owp, nfsd); nfsd = wp) { 1060 wp = LIST_NEXT(nfsd, nd_hash); 1061 if (NFSW_SAMECRED(owp, nfsd)) 1062 nfsrvw_coalesce(owp, nfsd); 1063 } 1064 } else { 1065 LIST_INSERT_HEAD(wpp, nfsd, nd_hash); 1066 } 1067 } 1068 splx(s); 1069 } 1070 1071 /* 1072 * Now, do VOP_WRITE()s for any one(s) that need to be done now 1073 * and generate the associated reply mbuf list(s). 1074 */ 1075 loop1: 1076 cur_usec = (u_quad_t)time.tv_sec * 1000000 + (u_quad_t)time.tv_usec; 1077 s = splsoftclock(); 1078 for (nfsd = LIST_FIRST(&slp->ns_tq); nfsd; nfsd = owp) { 1079 owp = LIST_NEXT(nfsd, nd_tq); 1080 if (nfsd->nd_time > cur_usec) 1081 break; 1082 if (nfsd->nd_mreq) 1083 continue; 1084 LIST_REMOVE(nfsd, nd_tq); 1085 LIST_REMOVE(nfsd, nd_hash); 1086 splx(s); 1087 mrep = nfsd->nd_mrep; 1088 nfsd->nd_mrep = NULL; 1089 cred = &nfsd->nd_cr; 1090 v3 = (nfsd->nd_flag & ND_NFSV3); 1091 forat_ret = aftat_ret = 1; 1092 error = nfsrv_fhtovp(&nfsd->nd_fh, 1, &vp, cred, slp, 1093 nfsd->nd_nam, &rdonly, (nfsd->nd_flag & ND_KERBAUTH), 1094 FALSE); 1095 if (!error) { 1096 if (v3) 1097 forat_ret = VOP_GETATTR(vp, &forat, cred, procp); 1098 if (vp->v_type != VREG) { 1099 if (v3) 1100 error = EINVAL; 1101 else 1102 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 1103 } 1104 } else 1105 vp = NULL; 1106 if (!error) { 1107 nqsrv_getl(vp, ND_WRITE); 1108 error = nfsrv_access(vp, VWRITE, cred, rdonly, procp, 1); 1109 } 1110 1111 if (nfsd->nd_stable == NFSV3WRITE_UNSTABLE) 1112 ioflags = IO_NODELOCKED; 1113 else if (nfsd->nd_stable == NFSV3WRITE_DATASYNC) 1114 ioflags = (IO_SYNC | IO_NODELOCKED); 1115 else 1116 ioflags = (IO_METASYNC | IO_SYNC | IO_NODELOCKED); 1117 uiop->uio_rw = UIO_WRITE; 1118 uiop->uio_segflg = UIO_SYSSPACE; 1119 uiop->uio_procp = (struct proc *)0; 1120 uiop->uio_offset = nfsd->nd_off; 1121 uiop->uio_resid = nfsd->nd_eoff - nfsd->nd_off; 1122 if (uiop->uio_resid > 0) { 1123 mp = mrep; 1124 i = 0; 1125 while (mp) { 1126 if (mp->m_len > 0) 1127 i++; 1128 mp = mp->m_next; 1129 } 1130 uiop->uio_iovcnt = i; 1131 iov = malloc(i * sizeof (struct iovec), M_TEMP, M_WAITOK); 1132 uiop->uio_iov = ivp = iov; 1133 mp = mrep; 1134 while (mp) { 1135 if (mp->m_len > 0) { 1136 ivp->iov_base = mtod(mp, caddr_t); 1137 ivp->iov_len = mp->m_len; 1138 ivp++; 1139 } 1140 mp = mp->m_next; 1141 } 1142 if (!error) { 1143 error = VOP_WRITE(vp, uiop, ioflags, cred); 1144 nfsstats.srvvop_writes++; 1145 } 1146 free((caddr_t)iov, M_TEMP); 1147 } 1148 m_freem(mrep); 1149 if (vp) { 1150 aftat_ret = VOP_GETATTR(vp, &va, cred, procp); 1151 vput(vp); 1152 } 1153 1154 /* 1155 * Loop around generating replies for all write rpcs that have 1156 * now been completed. 1157 */ 1158 swp = nfsd; 1159 do { 1160 if (error) { 1161 nfsm_writereply(NFSX_WCCDATA(v3), v3); 1162 if (v3) { 1163 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1164 } 1165 } else { 1166 nfsm_writereply(NFSX_PREOPATTR(v3) + 1167 NFSX_POSTOPORFATTR(v3) + 2 * NFSX_UNSIGNED + 1168 NFSX_WRITEVERF(v3), v3); 1169 if (v3) { 1170 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1171 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1172 *tl++ = txdr_unsigned(nfsd->nd_len); 1173 *tl++ = txdr_unsigned(swp->nd_stable); 1174 /* 1175 * Actually, there is no need to txdr these fields, 1176 * but it may make the values more human readable, 1177 * for debugging purposes. 1178 */ 1179 *tl++ = txdr_unsigned(boottime.tv_sec); 1180 *tl = txdr_unsigned(boottime.tv_usec); 1181 } else { 1182 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 1183 nfsm_srvfillattr(&va, fp); 1184 } 1185 } 1186 nfsd->nd_mreq = mreq; 1187 if (nfsd->nd_mrep) 1188 panic("nfsrv_write: nd_mrep not free"); 1189 1190 /* 1191 * Done. Put it at the head of the timer queue so that 1192 * the final phase can return the reply. 1193 */ 1194 s = splsoftclock(); 1195 if (nfsd != swp) { 1196 nfsd->nd_time = 0; 1197 LIST_INSERT_HEAD(&slp->ns_tq, nfsd, nd_tq); 1198 } 1199 nfsd = LIST_FIRST(&swp->nd_coalesce); 1200 if (nfsd) { 1201 LIST_REMOVE(nfsd, nd_tq); 1202 } 1203 splx(s); 1204 } while (nfsd); 1205 s = splsoftclock(); 1206 swp->nd_time = 0; 1207 LIST_INSERT_HEAD(&slp->ns_tq, swp, nd_tq); 1208 splx(s); 1209 goto loop1; 1210 } 1211 splx(s); 1212 1213 /* 1214 * Search for a reply to return. 1215 */ 1216 s = splsoftclock(); 1217 LIST_FOREACH(nfsd, &slp->ns_tq, nd_tq) { 1218 if (nfsd->nd_mreq) { 1219 LIST_REMOVE(nfsd, nd_tq); 1220 *mrq = nfsd->nd_mreq; 1221 *ndp = nfsd; 1222 break; 1223 } 1224 } 1225 splx(s); 1226 return (0); 1227 } 1228 1229 /* 1230 * Coalesce the write request nfsd into owp. To do this we must: 1231 * - remove nfsd from the queues 1232 * - merge nfsd->nd_mrep into owp->nd_mrep 1233 * - update the nd_eoff and nd_stable for owp 1234 * - put nfsd on owp's nd_coalesce list 1235 * NB: Must be called at splsoftclock(). 1236 */ 1237 void 1238 nfsrvw_coalesce(owp, nfsd) 1239 struct nfsrv_descript *owp; 1240 struct nfsrv_descript *nfsd; 1241 { 1242 int overlap; 1243 struct mbuf *mp; 1244 struct nfsrv_descript *m; 1245 1246 LIST_REMOVE(nfsd, nd_hash); 1247 LIST_REMOVE(nfsd, nd_tq); 1248 if (owp->nd_eoff < nfsd->nd_eoff) { 1249 overlap = owp->nd_eoff - nfsd->nd_off; 1250 if (overlap < 0) 1251 panic("nfsrv_coalesce: bad off"); 1252 if (overlap > 0) 1253 m_adj(nfsd->nd_mrep, overlap); 1254 mp = owp->nd_mrep; 1255 while (mp->m_next) 1256 mp = mp->m_next; 1257 mp->m_next = nfsd->nd_mrep; 1258 owp->nd_eoff = nfsd->nd_eoff; 1259 } else 1260 m_freem(nfsd->nd_mrep); 1261 nfsd->nd_mrep = NULL; 1262 if (nfsd->nd_stable == NFSV3WRITE_FILESYNC) 1263 owp->nd_stable = NFSV3WRITE_FILESYNC; 1264 else if (nfsd->nd_stable == NFSV3WRITE_DATASYNC && 1265 owp->nd_stable == NFSV3WRITE_UNSTABLE) 1266 owp->nd_stable = NFSV3WRITE_DATASYNC; 1267 LIST_INSERT_HEAD(&owp->nd_coalesce, nfsd, nd_tq); 1268 /* 1269 * nfsd might hold coalesce elements! Move them to owp. 1270 * Otherwise, requests may be lost and clients will be stuck. 1271 */ 1272 while ((m = LIST_FIRST(&nfsd->nd_coalesce)) != NULL) { 1273 LIST_REMOVE(m, nd_tq); 1274 LIST_INSERT_HEAD(&owp->nd_coalesce, m, nd_tq); 1275 } 1276 } 1277 1278 /* 1279 * nfs create service 1280 * now does a truncate to 0 length via. setattr if it already exists 1281 */ 1282 int 1283 nfsrv_create(nfsd, slp, procp, mrq) 1284 struct nfsrv_descript *nfsd; 1285 struct nfssvc_sock *slp; 1286 struct proc *procp; 1287 struct mbuf **mrq; 1288 { 1289 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1290 struct mbuf *nam = nfsd->nd_nam; 1291 caddr_t dpos = nfsd->nd_dpos; 1292 struct ucred *cred = &nfsd->nd_cr; 1293 struct nfs_fattr *fp; 1294 struct vattr va, dirfor, diraft; 1295 struct nfsv2_sattr *sp; 1296 u_int32_t *tl; 1297 struct nameidata nd; 1298 caddr_t cp; 1299 int32_t t1; 1300 caddr_t bpos; 1301 int error = 0, cache, len, tsize, dirfor_ret = 1, diraft_ret = 1; 1302 int rdev = 0; 1303 int v3 = (nfsd->nd_flag & ND_NFSV3), how, exclusive_flag = 0; 1304 char *cp2; 1305 struct mbuf *mb, *mreq; 1306 struct vnode *vp = NULL, *dirp = NULL; 1307 nfsfh_t nfh; 1308 fhandle_t *fhp; 1309 u_quad_t frev, tempsize; 1310 u_char cverf[NFSX_V3CREATEVERF]; 1311 1312 nd.ni_cnd.cn_nameiop = 0; 1313 fhp = &nfh.fh_generic; 1314 nfsm_srvmtofh(fhp); 1315 nfsm_srvnamesiz(len); 1316 nd.ni_cnd.cn_cred = cred; 1317 nd.ni_cnd.cn_nameiop = CREATE; 1318 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 1319 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 1320 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1321 if (dirp) { 1322 if (v3) 1323 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 1324 procp); 1325 else { 1326 vrele(dirp); 1327 dirp = (struct vnode *)0; 1328 } 1329 } 1330 if (error) { 1331 nfsm_reply(NFSX_WCCDATA(v3)); 1332 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1333 if (dirp) 1334 vrele(dirp); 1335 return (0); 1336 } 1337 VATTR_NULL(&va); 1338 if (v3) { 1339 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1340 how = fxdr_unsigned(int, *tl); 1341 switch (how) { 1342 case NFSV3CREATE_GUARDED: 1343 if (nd.ni_vp) { 1344 error = EEXIST; 1345 break; 1346 } 1347 case NFSV3CREATE_UNCHECKED: 1348 nfsm_srvsattr(&va); 1349 break; 1350 case NFSV3CREATE_EXCLUSIVE: 1351 nfsm_dissect(cp, caddr_t, NFSX_V3CREATEVERF); 1352 memcpy(cverf, cp, NFSX_V3CREATEVERF); 1353 exclusive_flag = 1; 1354 if (nd.ni_vp == NULL) 1355 va.va_mode = 0; 1356 break; 1357 }; 1358 va.va_type = VREG; 1359 } else { 1360 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1361 va.va_type = IFTOVT(fxdr_unsigned(u_int32_t, sp->sa_mode)); 1362 if (va.va_type == VNON) 1363 va.va_type = VREG; 1364 va.va_mode = nfstov_mode(sp->sa_mode); 1365 switch (va.va_type) { 1366 case VREG: 1367 tsize = fxdr_unsigned(int32_t, sp->sa_size); 1368 if (tsize != -1) 1369 va.va_size = (u_quad_t)tsize; 1370 break; 1371 case VCHR: 1372 case VBLK: 1373 case VFIFO: 1374 rdev = fxdr_unsigned(int32_t, sp->sa_size); 1375 break; 1376 default: 1377 break; 1378 }; 1379 } 1380 1381 /* 1382 * Iff doesn't exist, create it 1383 * otherwise just truncate to 0 length 1384 * should I set the mode too ?? 1385 */ 1386 if (nd.ni_vp == NULL) { 1387 if (va.va_type == VREG || va.va_type == VSOCK) { 1388 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1389 error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1390 if (!error) { 1391 if (exclusive_flag) { 1392 exclusive_flag = 0; 1393 VATTR_NULL(&va); 1394 memcpy((caddr_t)&va.va_atime, cverf, 1395 NFSX_V3CREATEVERF); 1396 error = VOP_SETATTR(nd.ni_vp, &va, cred, 1397 procp); 1398 } 1399 } 1400 } else if (va.va_type == VCHR || va.va_type == VBLK || 1401 va.va_type == VFIFO) { 1402 if (va.va_type == VCHR && rdev == 0xffffffff) 1403 va.va_type = VFIFO; 1404 if (va.va_type != VFIFO && 1405 (error = suser(cred, (u_short *)0))) { 1406 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1407 vput(nd.ni_dvp); 1408 nfsm_reply(0); 1409 return (error); 1410 } else 1411 va.va_rdev = (dev_t)rdev; 1412 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1413 error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, 1414 &va); 1415 if (error) { 1416 nfsm_reply(0); 1417 } 1418 if (nd.ni_cnd.cn_flags & ISSYMLINK) { 1419 vrele(nd.ni_dvp); 1420 vput(nd.ni_vp); 1421 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1422 error = EINVAL; 1423 nfsm_reply(0); 1424 } 1425 } else { 1426 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1427 vput(nd.ni_dvp); 1428 error = ENXIO; 1429 } 1430 vp = nd.ni_vp; 1431 } else { 1432 vp = nd.ni_vp; 1433 if (nd.ni_dvp == vp) 1434 vrele(nd.ni_dvp); 1435 else 1436 vput(nd.ni_dvp); 1437 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1438 if (!error && va.va_size != -1) { 1439 error = nfsrv_access(vp, VWRITE, cred, 1440 (nd.ni_cnd.cn_flags & RDONLY), procp, 0); 1441 if (!error) { 1442 nqsrv_getl(vp, ND_WRITE); 1443 tempsize = va.va_size; 1444 VATTR_NULL(&va); 1445 va.va_size = tempsize; 1446 error = VOP_SETATTR(vp, &va, cred, 1447 procp); 1448 } 1449 } 1450 if (error) 1451 vput(vp); 1452 } 1453 if (!error) { 1454 memset((caddr_t)fhp, 0, sizeof(nfh)); 1455 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; 1456 error = VFS_VPTOFH(vp, &fhp->fh_fid); 1457 if (!error) 1458 error = VOP_GETATTR(vp, &va, cred, procp); 1459 vput(vp); 1460 } 1461 if (v3) { 1462 if (exclusive_flag && !error && 1463 memcmp(cverf, (caddr_t)&va.va_atime, NFSX_V3CREATEVERF)) 1464 error = EEXIST; 1465 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 1466 vrele(dirp); 1467 } 1468 nfsm_reply(NFSX_SRVFH(v3) + NFSX_FATTR(v3) + NFSX_WCCDATA(v3)); 1469 if (v3) { 1470 if (!error) { 1471 nfsm_srvpostop_fh(fhp); 1472 nfsm_srvpostop_attr(0, &va); 1473 } 1474 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1475 } else { 1476 nfsm_srvfhtom(fhp, v3); 1477 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 1478 nfsm_srvfillattr(&va, fp); 1479 } 1480 return (0); 1481 nfsmout: 1482 if (dirp) 1483 vrele(dirp); 1484 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1485 if (nd.ni_dvp == nd.ni_vp) 1486 vrele(nd.ni_dvp); 1487 else 1488 vput(nd.ni_dvp); 1489 if (nd.ni_vp) 1490 vput(nd.ni_vp); 1491 return (error); 1492 } 1493 1494 /* 1495 * nfs v3 mknod service 1496 */ 1497 int 1498 nfsrv_mknod(nfsd, slp, procp, mrq) 1499 struct nfsrv_descript *nfsd; 1500 struct nfssvc_sock *slp; 1501 struct proc *procp; 1502 struct mbuf **mrq; 1503 { 1504 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1505 struct mbuf *nam = nfsd->nd_nam; 1506 caddr_t dpos = nfsd->nd_dpos; 1507 struct ucred *cred = &nfsd->nd_cr; 1508 struct vattr va, dirfor, diraft; 1509 u_int32_t *tl; 1510 struct nameidata nd; 1511 int32_t t1; 1512 caddr_t bpos; 1513 int error = 0, cache, len, dirfor_ret = 1, diraft_ret = 1; 1514 u_int32_t major, minor; 1515 enum vtype vtyp; 1516 char *cp2; 1517 struct mbuf *mb, *mreq; 1518 struct vnode *vp, *dirp = (struct vnode *)0; 1519 nfsfh_t nfh; 1520 fhandle_t *fhp; 1521 u_quad_t frev; 1522 1523 nd.ni_cnd.cn_nameiop = 0; 1524 fhp = &nfh.fh_generic; 1525 nfsm_srvmtofh(fhp); 1526 nfsm_srvnamesiz(len); 1527 nd.ni_cnd.cn_cred = cred; 1528 nd.ni_cnd.cn_nameiop = CREATE; 1529 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 1530 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 1531 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1532 if (dirp) 1533 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, procp); 1534 if (error) { 1535 nfsm_reply(NFSX_WCCDATA(1)); 1536 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1537 if (dirp) 1538 vrele(dirp); 1539 return (0); 1540 } 1541 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1542 vtyp = nfsv3tov_type(*tl); 1543 if (vtyp != VCHR && vtyp != VBLK && vtyp != VSOCK && vtyp != VFIFO) { 1544 error = NFSERR_BADTYPE; 1545 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1546 if (nd.ni_dvp == nd.ni_vp) 1547 vrele(nd.ni_dvp); 1548 else 1549 vput(nd.ni_dvp); 1550 if (nd.ni_vp) 1551 vput(nd.ni_vp); 1552 goto out; 1553 } 1554 VATTR_NULL(&va); 1555 nfsm_srvsattr(&va); 1556 if (vtyp == VCHR || vtyp == VBLK) { 1557 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1558 major = fxdr_unsigned(u_int32_t, *tl++); 1559 minor = fxdr_unsigned(u_int32_t, *tl); 1560 va.va_rdev = makedev(major, minor); 1561 } 1562 1563 /* 1564 * Iff doesn't exist, create it. 1565 */ 1566 if (nd.ni_vp) { 1567 error = EEXIST; 1568 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1569 if (nd.ni_dvp == nd.ni_vp) 1570 vrele(nd.ni_dvp); 1571 else 1572 vput(nd.ni_dvp); 1573 vput(nd.ni_vp); 1574 goto out; 1575 } 1576 va.va_type = vtyp; 1577 if (vtyp == VSOCK) { 1578 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1579 error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1580 } else { 1581 if (va.va_type != VFIFO && 1582 (error = suser(cred, (u_short *)0))) { 1583 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1584 vput(nd.ni_dvp); 1585 goto out; 1586 } 1587 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1588 error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1589 if (error) { 1590 goto out; 1591 } 1592 if (error) 1593 goto out; 1594 if (nd.ni_cnd.cn_flags & ISSYMLINK) { 1595 vput(nd.ni_vp); 1596 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1597 error = EINVAL; 1598 } 1599 } 1600 out: 1601 vp = nd.ni_vp; 1602 if (!error) { 1603 memset((caddr_t)fhp, 0, sizeof(nfh)); 1604 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; 1605 error = VFS_VPTOFH(vp, &fhp->fh_fid); 1606 if (!error) 1607 error = VOP_GETATTR(vp, &va, cred, procp); 1608 vput(vp); 1609 } 1610 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 1611 vrele(dirp); 1612 nfsm_reply(NFSX_SRVFH(1) + NFSX_POSTOPATTR(1) + NFSX_WCCDATA(1)); 1613 if (!error) { 1614 nfsm_srvpostop_fh(fhp); 1615 nfsm_srvpostop_attr(0, &va); 1616 } 1617 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1618 return (0); 1619 nfsmout: 1620 if (dirp) 1621 vrele(dirp); 1622 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1623 if (nd.ni_dvp == nd.ni_vp) 1624 vrele(nd.ni_dvp); 1625 else 1626 vput(nd.ni_dvp); 1627 if (nd.ni_vp) 1628 vput(nd.ni_vp); 1629 return (error); 1630 } 1631 1632 /* 1633 * nfs remove service 1634 */ 1635 int 1636 nfsrv_remove(nfsd, slp, procp, mrq) 1637 struct nfsrv_descript *nfsd; 1638 struct nfssvc_sock *slp; 1639 struct proc *procp; 1640 struct mbuf **mrq; 1641 { 1642 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1643 struct mbuf *nam = nfsd->nd_nam; 1644 caddr_t dpos = nfsd->nd_dpos; 1645 struct ucred *cred = &nfsd->nd_cr; 1646 struct nameidata nd; 1647 u_int32_t *tl; 1648 int32_t t1; 1649 caddr_t bpos; 1650 int error = 0, cache, len, dirfor_ret = 1, diraft_ret = 1; 1651 int v3 = (nfsd->nd_flag & ND_NFSV3); 1652 char *cp2; 1653 struct mbuf *mb, *mreq; 1654 struct vnode *vp, *dirp; 1655 struct vattr dirfor, diraft; 1656 nfsfh_t nfh; 1657 fhandle_t *fhp; 1658 u_quad_t frev; 1659 1660 #ifndef nolint 1661 vp = (struct vnode *)0; 1662 #endif 1663 fhp = &nfh.fh_generic; 1664 nfsm_srvmtofh(fhp); 1665 nfsm_srvnamesiz(len); 1666 nd.ni_cnd.cn_cred = cred; 1667 nd.ni_cnd.cn_nameiop = DELETE; 1668 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 1669 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 1670 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1671 if (dirp) { 1672 if (v3) 1673 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 1674 procp); 1675 else 1676 vrele(dirp); 1677 } 1678 if (!error) { 1679 vp = nd.ni_vp; 1680 if (vp->v_type == VDIR && 1681 (error = suser(cred, (u_short *)0)) != 0) 1682 goto out; 1683 /* 1684 * The root of a mounted filesystem cannot be deleted. 1685 */ 1686 if (vp->v_flag & VROOT) { 1687 error = EBUSY; 1688 goto out; 1689 } 1690 out: 1691 if (!error) { 1692 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1693 nqsrv_getl(vp, ND_WRITE); 1694 error = VOP_REMOVE(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); 1695 } else { 1696 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1697 if (nd.ni_dvp == vp) 1698 vrele(nd.ni_dvp); 1699 else 1700 vput(nd.ni_dvp); 1701 vput(vp); 1702 } 1703 } 1704 if (dirp && v3) { 1705 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 1706 vrele(dirp); 1707 } 1708 nfsm_reply(NFSX_WCCDATA(v3)); 1709 if (v3) { 1710 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1711 return (0); 1712 } 1713 nfsm_srvdone; 1714 } 1715 1716 /* 1717 * nfs rename service 1718 */ 1719 int 1720 nfsrv_rename(nfsd, slp, procp, mrq) 1721 struct nfsrv_descript *nfsd; 1722 struct nfssvc_sock *slp; 1723 struct proc *procp; 1724 struct mbuf **mrq; 1725 { 1726 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1727 struct mbuf *nam = nfsd->nd_nam; 1728 caddr_t dpos = nfsd->nd_dpos; 1729 struct ucred *cred = &nfsd->nd_cr; 1730 u_int32_t *tl; 1731 int32_t t1; 1732 caddr_t bpos; 1733 int error = 0, cache, fdirfor_ret = 1, fdiraft_ret = 1; 1734 uint32_t len, len2; 1735 int tdirfor_ret = 1, tdiraft_ret = 1; 1736 int v3 = (nfsd->nd_flag & ND_NFSV3); 1737 char *cp2; 1738 struct mbuf *mb, *mreq; 1739 struct nameidata fromnd, tond; 1740 struct vnode *fvp, *tvp, *tdvp, *fdirp = (struct vnode *)0; 1741 struct vnode *tdirp = (struct vnode *)0; 1742 struct vattr fdirfor, fdiraft, tdirfor, tdiraft; 1743 nfsfh_t fnfh, tnfh; 1744 fhandle_t *ffhp, *tfhp; 1745 u_quad_t frev; 1746 uid_t saved_uid; 1747 1748 #ifndef nolint 1749 fvp = (struct vnode *)0; 1750 #endif 1751 ffhp = &fnfh.fh_generic; 1752 tfhp = &tnfh.fh_generic; 1753 fromnd.ni_cnd.cn_nameiop = 0; 1754 tond.ni_cnd.cn_nameiop = 0; 1755 nfsm_srvmtofh(ffhp); 1756 nfsm_srvnamesiz(len); 1757 /* 1758 * Remember our original uid so that we can reset cr_uid before 1759 * the second nfs_namei() call, in case it is remapped. 1760 */ 1761 saved_uid = cred->cr_uid; 1762 fromnd.ni_cnd.cn_cred = cred; 1763 fromnd.ni_cnd.cn_nameiop = DELETE; 1764 fromnd.ni_cnd.cn_flags = WANTPARENT | SAVESTART; 1765 error = nfs_namei(&fromnd, ffhp, len, slp, nam, &md, 1766 &dpos, &fdirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1767 if (fdirp) { 1768 if (v3) 1769 fdirfor_ret = VOP_GETATTR(fdirp, &fdirfor, cred, 1770 procp); 1771 else { 1772 vrele(fdirp); 1773 fdirp = (struct vnode *)0; 1774 } 1775 } 1776 if (error) { 1777 nfsm_reply(2 * NFSX_WCCDATA(v3)); 1778 nfsm_srvwcc_data(fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft); 1779 nfsm_srvwcc_data(tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft); 1780 if (fdirp) 1781 vrele(fdirp); 1782 return (0); 1783 } 1784 fvp = fromnd.ni_vp; 1785 nfsm_srvmtofh(tfhp); 1786 if (v3) { 1787 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 1788 len2 = fxdr_unsigned(uint32_t, *tl); 1789 /* len2 will be checked by nfs_namei */ 1790 } 1791 else { 1792 /* NFSv2 */ 1793 nfsm_strsiz(len2, NFS_MAXNAMLEN); 1794 } 1795 cred->cr_uid = saved_uid; 1796 tond.ni_cnd.cn_cred = cred; 1797 tond.ni_cnd.cn_nameiop = RENAME; 1798 tond.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF | NOCACHE | SAVESTART; 1799 error = nfs_namei(&tond, tfhp, len2, slp, nam, &md, 1800 &dpos, &tdirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1801 if (tdirp) { 1802 if (v3) 1803 tdirfor_ret = VOP_GETATTR(tdirp, &tdirfor, cred, 1804 procp); 1805 else { 1806 vrele(tdirp); 1807 tdirp = (struct vnode *)0; 1808 } 1809 } 1810 if (error) { 1811 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 1812 vrele(fromnd.ni_dvp); 1813 vrele(fvp); 1814 goto out1; 1815 } 1816 tdvp = tond.ni_dvp; 1817 tvp = tond.ni_vp; 1818 if (tvp != NULL) { 1819 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 1820 if (v3) 1821 error = EEXIST; 1822 else 1823 error = EISDIR; 1824 goto out; 1825 } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 1826 if (v3) 1827 error = EEXIST; 1828 else 1829 error = ENOTDIR; 1830 goto out; 1831 } 1832 if (tvp->v_type == VDIR && tvp->v_mountedhere) { 1833 if (v3) 1834 error = EXDEV; 1835 else 1836 error = ENOTEMPTY; 1837 goto out; 1838 } 1839 } 1840 if (fvp->v_type == VDIR && fvp->v_mountedhere) { 1841 if (v3) 1842 error = EXDEV; 1843 else 1844 error = ENOTEMPTY; 1845 goto out; 1846 } 1847 if (fvp->v_mount != tdvp->v_mount) { 1848 if (v3) 1849 error = EXDEV; 1850 else 1851 error = ENOTEMPTY; 1852 goto out; 1853 } 1854 if (fvp == tdvp) { 1855 if (v3) 1856 error = EINVAL; 1857 else 1858 error = ENOTEMPTY; 1859 } 1860 /* 1861 * If source is the same as the destination (that is the 1862 * same vnode with the same name in the same directory), 1863 * then there is nothing to do. 1864 */ 1865 if (fvp == tvp && fromnd.ni_dvp == tdvp && 1866 fromnd.ni_cnd.cn_namelen == tond.ni_cnd.cn_namelen && 1867 !memcmp(fromnd.ni_cnd.cn_nameptr, tond.ni_cnd.cn_nameptr, 1868 fromnd.ni_cnd.cn_namelen)) 1869 error = -1; 1870 out: 1871 if (!error) { 1872 nqsrv_getl(fromnd.ni_dvp, ND_WRITE); 1873 nqsrv_getl(tdvp, ND_WRITE); 1874 if (tvp) { 1875 nqsrv_getl(tvp, ND_WRITE); 1876 } 1877 error = VOP_RENAME(fromnd.ni_dvp, fromnd.ni_vp, &fromnd.ni_cnd, 1878 tond.ni_dvp, tond.ni_vp, &tond.ni_cnd); 1879 } else { 1880 VOP_ABORTOP(tond.ni_dvp, &tond.ni_cnd); 1881 if (tdvp == tvp) 1882 vrele(tdvp); 1883 else 1884 vput(tdvp); 1885 if (tvp) 1886 vput(tvp); 1887 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 1888 vrele(fromnd.ni_dvp); 1889 vrele(fvp); 1890 if (error == -1) 1891 error = 0; 1892 } 1893 vrele(tond.ni_startdir); 1894 PNBUF_PUT(tond.ni_cnd.cn_pnbuf); 1895 out1: 1896 if (fdirp) { 1897 fdiraft_ret = VOP_GETATTR(fdirp, &fdiraft, cred, procp); 1898 vrele(fdirp); 1899 } 1900 if (tdirp) { 1901 tdiraft_ret = VOP_GETATTR(tdirp, &tdiraft, cred, procp); 1902 vrele(tdirp); 1903 } 1904 vrele(fromnd.ni_startdir); 1905 PNBUF_PUT(fromnd.ni_cnd.cn_pnbuf); 1906 nfsm_reply(2 * NFSX_WCCDATA(v3)); 1907 if (v3) { 1908 nfsm_srvwcc_data(fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft); 1909 nfsm_srvwcc_data(tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft); 1910 } 1911 return (0); 1912 1913 nfsmout: 1914 if (fdirp) 1915 vrele(fdirp); 1916 if (tdirp) 1917 vrele(tdirp); 1918 if (tond.ni_cnd.cn_nameiop) { 1919 vrele(tond.ni_startdir); 1920 PNBUF_PUT(tond.ni_cnd.cn_pnbuf); 1921 } 1922 if (fromnd.ni_cnd.cn_nameiop) { 1923 vrele(fromnd.ni_startdir); 1924 PNBUF_PUT(fromnd.ni_cnd.cn_pnbuf); 1925 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 1926 vrele(fromnd.ni_dvp); 1927 vrele(fvp); 1928 } 1929 return (error); 1930 } 1931 1932 /* 1933 * nfs link service 1934 */ 1935 int 1936 nfsrv_link(nfsd, slp, procp, mrq) 1937 struct nfsrv_descript *nfsd; 1938 struct nfssvc_sock *slp; 1939 struct proc *procp; 1940 struct mbuf **mrq; 1941 { 1942 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1943 struct mbuf *nam = nfsd->nd_nam; 1944 caddr_t dpos = nfsd->nd_dpos; 1945 struct ucred *cred = &nfsd->nd_cr; 1946 struct nameidata nd; 1947 u_int32_t *tl; 1948 int32_t t1; 1949 caddr_t bpos; 1950 int error = 0, rdonly, cache, len, dirfor_ret = 1, diraft_ret = 1; 1951 int getret = 1, v3 = (nfsd->nd_flag & ND_NFSV3); 1952 char *cp2; 1953 struct mbuf *mb, *mreq; 1954 struct vnode *vp, *xp, *dirp = (struct vnode *)0; 1955 struct vattr dirfor, diraft, at; 1956 nfsfh_t nfh, dnfh; 1957 fhandle_t *fhp, *dfhp; 1958 u_quad_t frev; 1959 1960 fhp = &nfh.fh_generic; 1961 dfhp = &dnfh.fh_generic; 1962 nfsm_srvmtofh(fhp); 1963 nfsm_srvmtofh(dfhp); 1964 nfsm_srvnamesiz(len); 1965 error = nfsrv_fhtovp(fhp, FALSE, &vp, cred, slp, nam, 1966 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1967 if (error) { 1968 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 1969 nfsm_srvpostop_attr(getret, &at); 1970 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1971 return (0); 1972 } 1973 if (vp->v_type == VDIR && (error = suser(cred, (u_short *)0)) != 0) 1974 goto out1; 1975 nd.ni_cnd.cn_cred = cred; 1976 nd.ni_cnd.cn_nameiop = CREATE; 1977 nd.ni_cnd.cn_flags = LOCKPARENT; 1978 error = nfs_namei(&nd, dfhp, len, slp, nam, &md, &dpos, 1979 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1980 if (dirp) { 1981 if (v3) 1982 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 1983 procp); 1984 else { 1985 vrele(dirp); 1986 dirp = (struct vnode *)0; 1987 } 1988 } 1989 if (error) 1990 goto out1; 1991 xp = nd.ni_vp; 1992 if (xp != NULL) { 1993 error = EEXIST; 1994 goto out; 1995 } 1996 xp = nd.ni_dvp; 1997 if (vp->v_mount != xp->v_mount) 1998 error = EXDEV; 1999 out: 2000 if (!error) { 2001 nqsrv_getl(vp, ND_WRITE); 2002 nqsrv_getl(xp, ND_WRITE); 2003 error = VOP_LINK(nd.ni_dvp, vp, &nd.ni_cnd); 2004 } else { 2005 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2006 if (nd.ni_dvp == nd.ni_vp) 2007 vrele(nd.ni_dvp); 2008 else 2009 vput(nd.ni_dvp); 2010 if (nd.ni_vp) 2011 vrele(nd.ni_vp); 2012 } 2013 out1: 2014 if (v3) 2015 getret = VOP_GETATTR(vp, &at, cred, procp); 2016 if (dirp) { 2017 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 2018 vrele(dirp); 2019 } 2020 vrele(vp); 2021 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2022 if (v3) { 2023 nfsm_srvpostop_attr(getret, &at); 2024 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2025 return (0); 2026 } 2027 nfsm_srvdone; 2028 } 2029 2030 /* 2031 * nfs symbolic link service 2032 */ 2033 int 2034 nfsrv_symlink(nfsd, slp, procp, mrq) 2035 struct nfsrv_descript *nfsd; 2036 struct nfssvc_sock *slp; 2037 struct proc *procp; 2038 struct mbuf **mrq; 2039 { 2040 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2041 struct mbuf *nam = nfsd->nd_nam; 2042 caddr_t dpos = nfsd->nd_dpos; 2043 struct ucred *cred = &nfsd->nd_cr; 2044 struct vattr va, dirfor, diraft; 2045 struct nameidata nd; 2046 u_int32_t *tl; 2047 int32_t t1; 2048 struct nfsv2_sattr *sp; 2049 char *bpos, *pathcp = NULL, *cp2; 2050 struct uio io; 2051 struct iovec iv; 2052 int error = 0, cache, dirfor_ret = 1, diraft_ret = 1; 2053 uint32_t len, len2; 2054 int v3 = (nfsd->nd_flag & ND_NFSV3); 2055 struct mbuf *mb, *mreq; 2056 struct vnode *dirp = (struct vnode *)0; 2057 nfsfh_t nfh; 2058 fhandle_t *fhp; 2059 u_quad_t frev; 2060 2061 nd.ni_cnd.cn_nameiop = 0; 2062 fhp = &nfh.fh_generic; 2063 nfsm_srvmtofh(fhp); 2064 nfsm_srvnamesiz(len); 2065 nd.ni_cnd.cn_cred = cred; 2066 nd.ni_cnd.cn_nameiop = CREATE; 2067 nd.ni_cnd.cn_flags = LOCKPARENT; 2068 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 2069 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2070 if (dirp) { 2071 if (v3) 2072 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 2073 procp); 2074 else { 2075 vrele(dirp); 2076 dirp = (struct vnode *)0; 2077 } 2078 } 2079 if (error) 2080 goto out; 2081 VATTR_NULL(&va); 2082 if (v3) { 2083 nfsm_srvsattr(&va); 2084 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 2085 len2 = fxdr_unsigned(uint32_t, *tl); 2086 if (len2 > PATH_MAX) { 2087 /* XXX should check _PC_NO_TRUNC */ 2088 error = ENAMETOOLONG; 2089 goto abortop; 2090 } 2091 } 2092 else { 2093 /* NFSv2 */ 2094 nfsm_strsiz(len2, NFS_MAXPATHLEN); 2095 } 2096 pathcp = malloc(len2 + 1, M_TEMP, M_WAITOK); 2097 iv.iov_base = pathcp; 2098 iv.iov_len = len2; 2099 io.uio_resid = len2; 2100 io.uio_offset = 0; 2101 io.uio_iov = &iv; 2102 io.uio_iovcnt = 1; 2103 io.uio_segflg = UIO_SYSSPACE; 2104 io.uio_rw = UIO_READ; 2105 io.uio_procp = (struct proc *)0; 2106 nfsm_mtouio(&io, len2); 2107 if (!v3) { 2108 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2109 va.va_mode = fxdr_unsigned(u_int16_t, sp->sa_mode); 2110 } 2111 *(pathcp + len2) = '\0'; 2112 if (nd.ni_vp) { 2113 error = EEXIST; 2114 abortop: 2115 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2116 if (nd.ni_dvp == nd.ni_vp) 2117 vrele(nd.ni_dvp); 2118 else 2119 vput(nd.ni_dvp); 2120 if (nd.ni_vp) 2121 vrele(nd.ni_vp); 2122 goto out; 2123 } 2124 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2125 error = VOP_SYMLINK(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va, pathcp); 2126 if (!error) { 2127 if (v3) { 2128 memset((caddr_t)fhp, 0, sizeof(nfh)); 2129 fhp->fh_fsid = nd.ni_vp->v_mount->mnt_stat.f_fsid; 2130 error = VFS_VPTOFH(nd.ni_vp, &fhp->fh_fid); 2131 if (!error) 2132 error = VOP_GETATTR(nd.ni_vp, &va, cred, 2133 procp); 2134 vput(nd.ni_vp); 2135 } else { 2136 vput(nd.ni_vp); 2137 } 2138 } 2139 out: 2140 if (pathcp) 2141 free(pathcp, M_TEMP); 2142 if (dirp) { 2143 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 2144 vrele(dirp); 2145 } 2146 nfsm_reply(NFSX_SRVFH(v3) + NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2147 if (v3) { 2148 if (!error) { 2149 nfsm_srvpostop_fh(fhp); 2150 nfsm_srvpostop_attr(0, &va); 2151 } 2152 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2153 } 2154 return (0); 2155 nfsmout: 2156 if (dirp) 2157 vrele(dirp); 2158 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2159 if (nd.ni_dvp == nd.ni_vp) 2160 vrele(nd.ni_dvp); 2161 else 2162 vput(nd.ni_dvp); 2163 if (nd.ni_vp) 2164 vrele(nd.ni_vp); 2165 if (pathcp) 2166 free(pathcp, M_TEMP); 2167 return (error); 2168 } 2169 2170 /* 2171 * nfs mkdir service 2172 */ 2173 int 2174 nfsrv_mkdir(nfsd, slp, procp, mrq) 2175 struct nfsrv_descript *nfsd; 2176 struct nfssvc_sock *slp; 2177 struct proc *procp; 2178 struct mbuf **mrq; 2179 { 2180 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2181 struct mbuf *nam = nfsd->nd_nam; 2182 caddr_t dpos = nfsd->nd_dpos; 2183 struct ucred *cred = &nfsd->nd_cr; 2184 struct vattr va, dirfor, diraft; 2185 struct nfs_fattr *fp; 2186 struct nameidata nd; 2187 caddr_t cp; 2188 u_int32_t *tl; 2189 int32_t t1; 2190 caddr_t bpos; 2191 int error = 0, cache, len, dirfor_ret = 1, diraft_ret = 1; 2192 int v3 = (nfsd->nd_flag & ND_NFSV3); 2193 char *cp2; 2194 struct mbuf *mb, *mreq; 2195 struct vnode *vp, *dirp = (struct vnode *)0; 2196 nfsfh_t nfh; 2197 fhandle_t *fhp; 2198 u_quad_t frev; 2199 2200 fhp = &nfh.fh_generic; 2201 nfsm_srvmtofh(fhp); 2202 nfsm_srvnamesiz(len); 2203 nd.ni_cnd.cn_cred = cred; 2204 nd.ni_cnd.cn_nameiop = CREATE; 2205 nd.ni_cnd.cn_flags = LOCKPARENT; 2206 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 2207 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2208 if (dirp) { 2209 if (v3) 2210 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 2211 procp); 2212 else { 2213 vrele(dirp); 2214 dirp = (struct vnode *)0; 2215 } 2216 } 2217 if (error) { 2218 nfsm_reply(NFSX_WCCDATA(v3)); 2219 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2220 if (dirp) 2221 vrele(dirp); 2222 return (0); 2223 } 2224 VATTR_NULL(&va); 2225 if (v3) { 2226 nfsm_srvsattr(&va); 2227 } else { 2228 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2229 va.va_mode = nfstov_mode(*tl++); 2230 } 2231 va.va_type = VDIR; 2232 vp = nd.ni_vp; 2233 if (vp != NULL) { 2234 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2235 if (nd.ni_dvp == vp) 2236 vrele(nd.ni_dvp); 2237 else 2238 vput(nd.ni_dvp); 2239 vrele(vp); 2240 error = EEXIST; 2241 goto out; 2242 } 2243 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2244 error = VOP_MKDIR(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 2245 if (!error) { 2246 vp = nd.ni_vp; 2247 memset((caddr_t)fhp, 0, sizeof(nfh)); 2248 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; 2249 error = VFS_VPTOFH(vp, &fhp->fh_fid); 2250 if (!error) 2251 error = VOP_GETATTR(vp, &va, cred, procp); 2252 vput(vp); 2253 } 2254 out: 2255 if (dirp) { 2256 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 2257 vrele(dirp); 2258 } 2259 nfsm_reply(NFSX_SRVFH(v3) + NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2260 if (v3) { 2261 if (!error) { 2262 nfsm_srvpostop_fh(fhp); 2263 nfsm_srvpostop_attr(0, &va); 2264 } 2265 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2266 } else { 2267 nfsm_srvfhtom(fhp, v3); 2268 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 2269 nfsm_srvfillattr(&va, fp); 2270 } 2271 return (0); 2272 nfsmout: 2273 if (dirp) 2274 vrele(dirp); 2275 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2276 if (nd.ni_dvp == nd.ni_vp) 2277 vrele(nd.ni_dvp); 2278 else 2279 vput(nd.ni_dvp); 2280 if (nd.ni_vp) 2281 vrele(nd.ni_vp); 2282 return (error); 2283 } 2284 2285 /* 2286 * nfs rmdir service 2287 */ 2288 int 2289 nfsrv_rmdir(nfsd, slp, procp, mrq) 2290 struct nfsrv_descript *nfsd; 2291 struct nfssvc_sock *slp; 2292 struct proc *procp; 2293 struct mbuf **mrq; 2294 { 2295 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2296 struct mbuf *nam = nfsd->nd_nam; 2297 caddr_t dpos = nfsd->nd_dpos; 2298 struct ucred *cred = &nfsd->nd_cr; 2299 u_int32_t *tl; 2300 int32_t t1; 2301 caddr_t bpos; 2302 int error = 0, cache, len, dirfor_ret = 1, diraft_ret = 1; 2303 int v3 = (nfsd->nd_flag & ND_NFSV3); 2304 char *cp2; 2305 struct mbuf *mb, *mreq; 2306 struct vnode *vp, *dirp = (struct vnode *)0; 2307 struct vattr dirfor, diraft; 2308 nfsfh_t nfh; 2309 fhandle_t *fhp; 2310 struct nameidata nd; 2311 u_quad_t frev; 2312 2313 fhp = &nfh.fh_generic; 2314 nfsm_srvmtofh(fhp); 2315 nfsm_srvnamesiz(len); 2316 nd.ni_cnd.cn_cred = cred; 2317 nd.ni_cnd.cn_nameiop = DELETE; 2318 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 2319 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 2320 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2321 if (dirp) { 2322 if (v3) 2323 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 2324 procp); 2325 else { 2326 vrele(dirp); 2327 dirp = (struct vnode *)0; 2328 } 2329 } 2330 if (error) { 2331 nfsm_reply(NFSX_WCCDATA(v3)); 2332 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2333 if (dirp) 2334 vrele(dirp); 2335 return (0); 2336 } 2337 vp = nd.ni_vp; 2338 if (vp->v_type != VDIR) { 2339 error = ENOTDIR; 2340 goto out; 2341 } 2342 /* 2343 * No rmdir "." please. 2344 */ 2345 if (nd.ni_dvp == vp) { 2346 error = EINVAL; 2347 goto out; 2348 } 2349 /* 2350 * The root of a mounted filesystem cannot be deleted. 2351 */ 2352 if (vp->v_flag & VROOT) 2353 error = EBUSY; 2354 out: 2355 if (!error) { 2356 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2357 nqsrv_getl(vp, ND_WRITE); 2358 error = VOP_RMDIR(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); 2359 } else { 2360 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2361 if (nd.ni_dvp == nd.ni_vp) 2362 vrele(nd.ni_dvp); 2363 else 2364 vput(nd.ni_dvp); 2365 vput(vp); 2366 } 2367 if (dirp) { 2368 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 2369 vrele(dirp); 2370 } 2371 nfsm_reply(NFSX_WCCDATA(v3)); 2372 if (v3) { 2373 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2374 return (0); 2375 } 2376 nfsm_srvdone; 2377 } 2378 2379 /* 2380 * nfs readdir service 2381 * - mallocs what it thinks is enough to read 2382 * count rounded up to a multiple of NFS_DIRBLKSIZ <= NFS_MAXREADDIR 2383 * - calls VOP_READDIR() 2384 * - loops around building the reply 2385 * if the output generated exceeds count break out of loop 2386 * The nfsm_clget macro is used here so that the reply will be packed 2387 * tightly in mbuf clusters. 2388 * - it only knows that it has encountered eof when the VOP_READDIR() 2389 * reads nothing 2390 * - as such one readdir rpc will return eof false although you are there 2391 * and then the next will return eof 2392 * - it trims out records with d_fileno == 0 2393 * this doesn't matter for Unix clients, but they might confuse clients 2394 * for other os'. 2395 * - it trims out records with d_type == DT_WHT 2396 * these cannot be seen through NFS (unless we extend the protocol) 2397 * NB: It is tempting to set eof to true if the VOP_READDIR() reads less 2398 * than requested, but this may not apply to all filesystems. For 2399 * example, client NFS does not { although it is never remote mounted 2400 * anyhow } 2401 * The alternate call nfsrv_readdirplus() does lookups as well. 2402 * PS: The NFS protocol spec. does not clarify what the "count" byte 2403 * argument is a count of.. just name strings and file id's or the 2404 * entire reply rpc or ... 2405 * I tried just file name and id sizes and it confused the Sun client, 2406 * so I am using the full rpc size now. The "paranoia.." comment refers 2407 * to including the status longwords that are not a part of the dir. 2408 * "entry" structures, but are in the rpc. 2409 */ 2410 struct flrep { 2411 nfsuint64 fl_off; 2412 u_int32_t fl_postopok; 2413 u_int32_t fl_fattr[NFSX_V3FATTR / sizeof (u_int32_t)]; 2414 u_int32_t fl_fhok; 2415 u_int32_t fl_fhsize; 2416 u_int32_t fl_nfh[NFSX_V3FH / sizeof (u_int32_t)]; 2417 }; 2418 2419 int 2420 nfsrv_readdir(nfsd, slp, procp, mrq) 2421 struct nfsrv_descript *nfsd; 2422 struct nfssvc_sock *slp; 2423 struct proc *procp; 2424 struct mbuf **mrq; 2425 { 2426 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2427 struct mbuf *nam = nfsd->nd_nam; 2428 caddr_t dpos = nfsd->nd_dpos; 2429 struct ucred *cred = &nfsd->nd_cr; 2430 char *bp, *be; 2431 struct mbuf *mp; 2432 struct dirent *dp; 2433 caddr_t cp; 2434 u_int32_t *tl; 2435 int32_t t1; 2436 caddr_t bpos; 2437 struct mbuf *mb, *mreq, *mp2; 2438 char *cpos, *cend, *cp2, *rbuf; 2439 struct vnode *vp; 2440 struct vattr at; 2441 nfsfh_t nfh; 2442 fhandle_t *fhp; 2443 struct uio io; 2444 struct iovec iv; 2445 int len, nlen, rem, xfer, tsiz, i, error = 0, getret = 1; 2446 int siz, cnt, fullsiz, eofflag, rdonly, cache, ncookies; 2447 int v3 = (nfsd->nd_flag & ND_NFSV3); 2448 u_quad_t frev, off, toff, verf; 2449 off_t *cookies = NULL, *cookiep; 2450 nfsuint64 jar; 2451 2452 fhp = &nfh.fh_generic; 2453 nfsm_srvmtofh(fhp); 2454 if (v3) { 2455 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 2456 toff = fxdr_hyper(tl); 2457 tl += 2; 2458 verf = fxdr_hyper(tl); 2459 tl += 2; 2460 } else { 2461 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2462 toff = fxdr_unsigned(u_quad_t, *tl++); 2463 } 2464 off = toff; 2465 cnt = fxdr_unsigned(int, *tl); 2466 siz = ((cnt + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1)); 2467 xfer = NFS_SRVMAXDATA(nfsd); 2468 if (siz > xfer) 2469 siz = xfer; 2470 fullsiz = siz; 2471 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 2472 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2473 if (!error && vp->v_type != VDIR) { 2474 error = ENOTDIR; 2475 vput(vp); 2476 } 2477 if (error) { 2478 nfsm_reply(NFSX_UNSIGNED); 2479 nfsm_srvpostop_attr(getret, &at); 2480 return (0); 2481 } 2482 nqsrv_getl(vp, ND_READ); 2483 if (v3) { 2484 error = getret = VOP_GETATTR(vp, &at, cred, procp); 2485 #ifdef NFS3_STRICTVERF 2486 /* 2487 * XXX This check is too strict for Solaris 2.5 clients. 2488 */ 2489 if (!error && toff && verf != at.va_filerev) 2490 error = NFSERR_BAD_COOKIE; 2491 #endif 2492 } 2493 if (!error) 2494 error = nfsrv_access(vp, VEXEC, cred, rdonly, procp, 0); 2495 if (error) { 2496 vput(vp); 2497 nfsm_reply(NFSX_POSTOPATTR(v3)); 2498 nfsm_srvpostop_attr(getret, &at); 2499 return (0); 2500 } 2501 VOP_UNLOCK(vp, 0); 2502 rbuf = malloc(siz, M_TEMP, M_WAITOK); 2503 again: 2504 iv.iov_base = rbuf; 2505 iv.iov_len = fullsiz; 2506 io.uio_iov = &iv; 2507 io.uio_iovcnt = 1; 2508 io.uio_offset = (off_t)off; 2509 io.uio_resid = fullsiz; 2510 io.uio_segflg = UIO_SYSSPACE; 2511 io.uio_rw = UIO_READ; 2512 io.uio_procp = (struct proc *)0; 2513 eofflag = 0; 2514 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2515 2516 error = VOP_READDIR(vp, &io, cred, &eofflag, &cookies, &ncookies); 2517 2518 off = (off_t)io.uio_offset; 2519 if (!cookies && !error) 2520 error = NFSERR_PERM; 2521 if (v3) { 2522 getret = VOP_GETATTR(vp, &at, cred, procp); 2523 if (!error) 2524 error = getret; 2525 } 2526 2527 VOP_UNLOCK(vp, 0); 2528 if (error) { 2529 vrele(vp); 2530 free((caddr_t)rbuf, M_TEMP); 2531 if (cookies) 2532 free((caddr_t)cookies, M_TEMP); 2533 nfsm_reply(NFSX_POSTOPATTR(v3)); 2534 nfsm_srvpostop_attr(getret, &at); 2535 return (0); 2536 } 2537 if (io.uio_resid) { 2538 siz -= io.uio_resid; 2539 2540 /* 2541 * If nothing read, return eof 2542 * rpc reply 2543 */ 2544 if (siz == 0) { 2545 vrele(vp); 2546 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_COOKIEVERF(v3) + 2547 2 * NFSX_UNSIGNED); 2548 if (v3) { 2549 nfsm_srvpostop_attr(getret, &at); 2550 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 2551 txdr_hyper(at.va_filerev, tl); 2552 tl += 2; 2553 } else 2554 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2555 *tl++ = nfs_false; 2556 *tl = nfs_true; 2557 free((caddr_t)rbuf, M_TEMP); 2558 free((caddr_t)cookies, M_TEMP); 2559 return (0); 2560 } 2561 } 2562 2563 /* 2564 * Check for degenerate cases of nothing useful read. 2565 * If so go try again 2566 */ 2567 cpos = rbuf; 2568 cend = rbuf + siz; 2569 dp = (struct dirent *)cpos; 2570 cookiep = cookies; 2571 2572 while (cpos < cend && ncookies > 0 && 2573 (dp->d_fileno == 0 || dp->d_type == DT_WHT)) { 2574 cpos += dp->d_reclen; 2575 dp = (struct dirent *)cpos; 2576 cookiep++; 2577 ncookies--; 2578 } 2579 if (cpos >= cend || ncookies == 0) { 2580 toff = off; 2581 siz = fullsiz; 2582 goto again; 2583 } 2584 2585 len = 3 * NFSX_UNSIGNED; /* paranoia, probably can be 0 */ 2586 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_COOKIEVERF(v3) + siz); 2587 if (v3) { 2588 nfsm_srvpostop_attr(getret, &at); 2589 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2590 txdr_hyper(at.va_filerev, tl); 2591 } 2592 mp = mp2 = mb; 2593 bp = bpos; 2594 be = bp + M_TRAILINGSPACE(mp); 2595 2596 /* Loop through the records and build reply */ 2597 while (cpos < cend && ncookies > 0) { 2598 if (dp->d_fileno != 0 && dp->d_type != DT_WHT) { 2599 nlen = dp->d_namlen; 2600 rem = nfsm_rndup(nlen)-nlen; 2601 len += (4 * NFSX_UNSIGNED + nlen + rem); 2602 if (v3) 2603 len += 2 * NFSX_UNSIGNED; 2604 if (len > cnt) { 2605 eofflag = 0; 2606 break; 2607 } 2608 /* 2609 * Build the directory record xdr from 2610 * the dirent entry. 2611 */ 2612 nfsm_clget; 2613 *tl = nfs_true; 2614 bp += NFSX_UNSIGNED; 2615 if (v3) { 2616 nfsm_clget; 2617 *tl = 0; 2618 bp += NFSX_UNSIGNED; 2619 } 2620 nfsm_clget; 2621 *tl = txdr_unsigned(dp->d_fileno); 2622 bp += NFSX_UNSIGNED; 2623 nfsm_clget; 2624 *tl = txdr_unsigned(nlen); 2625 bp += NFSX_UNSIGNED; 2626 2627 /* And loop around copying the name */ 2628 xfer = nlen; 2629 cp = dp->d_name; 2630 while (xfer > 0) { 2631 nfsm_clget; 2632 if ((bp+xfer) > be) 2633 tsiz = be-bp; 2634 else 2635 tsiz = xfer; 2636 memcpy(bp, cp, tsiz); 2637 bp += tsiz; 2638 xfer -= tsiz; 2639 if (xfer > 0) 2640 cp += tsiz; 2641 } 2642 /* And null pad to an int32_t boundary */ 2643 for (i = 0; i < rem; i++) 2644 *bp++ = '\0'; 2645 nfsm_clget; 2646 2647 /* Finish off the record */ 2648 txdr_hyper(*cookiep, &jar); 2649 if (v3) { 2650 *tl = jar.nfsuquad[0]; 2651 bp += NFSX_UNSIGNED; 2652 nfsm_clget; 2653 } 2654 *tl = jar.nfsuquad[1]; 2655 bp += NFSX_UNSIGNED; 2656 } 2657 cpos += dp->d_reclen; 2658 dp = (struct dirent *)cpos; 2659 cookiep++; 2660 ncookies--; 2661 } 2662 vrele(vp); 2663 nfsm_clget; 2664 *tl = nfs_false; 2665 bp += NFSX_UNSIGNED; 2666 nfsm_clget; 2667 if (eofflag) 2668 *tl = nfs_true; 2669 else 2670 *tl = nfs_false; 2671 bp += NFSX_UNSIGNED; 2672 if (mp != mb) { 2673 if (bp < be) 2674 mp->m_len = bp - mtod(mp, caddr_t); 2675 } else 2676 mp->m_len += bp - bpos; 2677 free((caddr_t)rbuf, M_TEMP); 2678 free((caddr_t)cookies, M_TEMP); 2679 nfsm_srvdone; 2680 } 2681 2682 int 2683 nfsrv_readdirplus(nfsd, slp, procp, mrq) 2684 struct nfsrv_descript *nfsd; 2685 struct nfssvc_sock *slp; 2686 struct proc *procp; 2687 struct mbuf **mrq; 2688 { 2689 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2690 struct mbuf *nam = nfsd->nd_nam; 2691 caddr_t dpos = nfsd->nd_dpos; 2692 struct ucred *cred = &nfsd->nd_cr; 2693 char *bp, *be; 2694 struct mbuf *mp; 2695 struct dirent *dp; 2696 caddr_t cp; 2697 u_int32_t *tl; 2698 int32_t t1; 2699 caddr_t bpos; 2700 struct mbuf *mb, *mreq, *mp2; 2701 char *cpos, *cend, *cp2, *rbuf; 2702 struct vnode *vp, *nvp; 2703 struct flrep fl; 2704 nfsfh_t nfh; 2705 fhandle_t *fhp, *nfhp = (fhandle_t *)fl.fl_nfh; 2706 struct uio io; 2707 struct iovec iv; 2708 struct vattr va, at, *vap = &va; 2709 struct nfs_fattr *fp; 2710 int len, nlen, rem, xfer, tsiz, i, error = 0, getret = 1; 2711 int siz, cnt, fullsiz, eofflag, rdonly, cache, dirlen, ncookies; 2712 u_quad_t frev, off, toff, verf; 2713 off_t *cookies = NULL, *cookiep; 2714 2715 fhp = &nfh.fh_generic; 2716 nfsm_srvmtofh(fhp); 2717 nfsm_dissect(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 2718 toff = fxdr_hyper(tl); 2719 tl += 2; 2720 verf = fxdr_hyper(tl); 2721 tl += 2; 2722 siz = fxdr_unsigned(int, *tl++); 2723 cnt = fxdr_unsigned(int, *tl); 2724 off = toff; 2725 siz = ((siz + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1)); 2726 xfer = NFS_SRVMAXDATA(nfsd); 2727 if (siz > xfer) 2728 siz = xfer; 2729 fullsiz = siz; 2730 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 2731 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2732 if (!error && vp->v_type != VDIR) { 2733 error = ENOTDIR; 2734 vput(vp); 2735 } 2736 if (error) { 2737 nfsm_reply(NFSX_UNSIGNED); 2738 nfsm_srvpostop_attr(getret, &at); 2739 return (0); 2740 } 2741 error = getret = VOP_GETATTR(vp, &at, cred, procp); 2742 #ifdef NFS3_STRICTVERF 2743 /* 2744 * XXX This check is too strict for Solaris 2.5 clients. 2745 */ 2746 if (!error && toff && verf != at.va_filerev) 2747 error = NFSERR_BAD_COOKIE; 2748 #endif 2749 if (!error) { 2750 nqsrv_getl(vp, ND_READ); 2751 error = nfsrv_access(vp, VEXEC, cred, rdonly, procp, 0); 2752 } 2753 if (error) { 2754 vput(vp); 2755 nfsm_reply(NFSX_V3POSTOPATTR); 2756 nfsm_srvpostop_attr(getret, &at); 2757 return (0); 2758 } 2759 VOP_UNLOCK(vp, 0); 2760 2761 rbuf = malloc(siz, M_TEMP, M_WAITOK); 2762 again: 2763 iv.iov_base = rbuf; 2764 iv.iov_len = fullsiz; 2765 io.uio_iov = &iv; 2766 io.uio_iovcnt = 1; 2767 io.uio_offset = (off_t)off; 2768 io.uio_resid = fullsiz; 2769 io.uio_segflg = UIO_SYSSPACE; 2770 io.uio_rw = UIO_READ; 2771 io.uio_procp = (struct proc *)0; 2772 eofflag = 0; 2773 2774 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2775 2776 error = VOP_READDIR(vp, &io, cred, &eofflag, &cookies, &ncookies); 2777 2778 off = (u_quad_t)io.uio_offset; 2779 getret = VOP_GETATTR(vp, &at, cred, procp); 2780 2781 VOP_UNLOCK(vp, 0); 2782 2783 /* 2784 * If the VGET operation doesn't work for this filesystem, 2785 * we can't support readdirplus. Returning NOTSUPP should 2786 * make clients fall back to plain readdir. 2787 * There's no need to check for VPTOFH as well, we wouldn't 2788 * even be here otherwise. 2789 */ 2790 if (!getret) { 2791 if ((getret = VFS_VGET(vp->v_mount, at.va_fileid, &nvp))) 2792 getret = (getret == EOPNOTSUPP) ? 2793 NFSERR_NOTSUPP : NFSERR_IO; 2794 else 2795 vput(nvp); 2796 } 2797 2798 if (!cookies && !error) 2799 error = NFSERR_PERM; 2800 if (!error) 2801 error = getret; 2802 if (error) { 2803 vrele(vp); 2804 if (cookies) 2805 free((caddr_t)cookies, M_TEMP); 2806 free((caddr_t)rbuf, M_TEMP); 2807 nfsm_reply(NFSX_V3POSTOPATTR); 2808 nfsm_srvpostop_attr(getret, &at); 2809 return (0); 2810 } 2811 if (io.uio_resid) { 2812 siz -= io.uio_resid; 2813 2814 /* 2815 * If nothing read, return eof 2816 * rpc reply 2817 */ 2818 if (siz == 0) { 2819 vrele(vp); 2820 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF + 2821 2 * NFSX_UNSIGNED); 2822 nfsm_srvpostop_attr(getret, &at); 2823 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 2824 txdr_hyper(at.va_filerev, tl); 2825 tl += 2; 2826 *tl++ = nfs_false; 2827 *tl = nfs_true; 2828 free((caddr_t)cookies, M_TEMP); 2829 free((caddr_t)rbuf, M_TEMP); 2830 return (0); 2831 } 2832 } 2833 2834 /* 2835 * Check for degenerate cases of nothing useful read. 2836 * If so go try again 2837 */ 2838 cpos = rbuf; 2839 cend = rbuf + siz; 2840 dp = (struct dirent *)cpos; 2841 cookiep = cookies; 2842 2843 while (cpos < cend && ncookies > 0 && 2844 (dp->d_fileno == 0 || dp->d_type == DT_WHT)) { 2845 cpos += dp->d_reclen; 2846 dp = (struct dirent *)cpos; 2847 cookiep++; 2848 ncookies--; 2849 } 2850 if (cpos >= cend || ncookies == 0) { 2851 toff = off; 2852 siz = fullsiz; 2853 goto again; 2854 } 2855 2856 dirlen = len = NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF + 2 * NFSX_UNSIGNED; 2857 nfsm_reply(cnt); 2858 nfsm_srvpostop_attr(getret, &at); 2859 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2860 txdr_hyper(at.va_filerev, tl); 2861 mp = mp2 = mb; 2862 bp = bpos; 2863 be = bp + M_TRAILINGSPACE(mp); 2864 2865 /* Loop through the records and build reply */ 2866 while (cpos < cend && ncookies > 0) { 2867 if (dp->d_fileno != 0 && dp->d_type != DT_WHT) { 2868 nlen = dp->d_namlen; 2869 rem = nfsm_rndup(nlen)-nlen; 2870 2871 /* 2872 * For readdir_and_lookup get the vnode using 2873 * the file number. 2874 */ 2875 if (VFS_VGET(vp->v_mount, dp->d_fileno, &nvp)) 2876 goto invalid; 2877 memset((caddr_t)nfhp, 0, NFSX_V3FH); 2878 nfhp->fh_fsid = 2879 nvp->v_mount->mnt_stat.f_fsid; 2880 if (VFS_VPTOFH(nvp, &nfhp->fh_fid)) { 2881 vput(nvp); 2882 goto invalid; 2883 } 2884 if (VOP_GETATTR(nvp, vap, cred, procp)) { 2885 vput(nvp); 2886 goto invalid; 2887 } 2888 vput(nvp); 2889 2890 /* 2891 * If either the dircount or maxcount will be 2892 * exceeded, get out now. Both of these lengths 2893 * are calculated conservatively, including all 2894 * XDR overheads. 2895 */ 2896 len += (8 * NFSX_UNSIGNED + nlen + rem + NFSX_V3FH + 2897 NFSX_V3POSTOPATTR); 2898 dirlen += (6 * NFSX_UNSIGNED + nlen + rem); 2899 if (len > cnt || dirlen > fullsiz) { 2900 eofflag = 0; 2901 break; 2902 } 2903 2904 /* 2905 * Build the directory record xdr from 2906 * the dirent entry. 2907 */ 2908 fp = (struct nfs_fattr *)&fl.fl_fattr; 2909 nfsm_srvfillattr(vap, fp); 2910 fl.fl_fhsize = txdr_unsigned(NFSX_V3FH); 2911 fl.fl_fhok = nfs_true; 2912 fl.fl_postopok = nfs_true; 2913 txdr_hyper(*cookiep, fl.fl_off.nfsuquad); 2914 2915 nfsm_clget; 2916 *tl = nfs_true; 2917 bp += NFSX_UNSIGNED; 2918 nfsm_clget; 2919 *tl = 0; 2920 bp += NFSX_UNSIGNED; 2921 nfsm_clget; 2922 *tl = txdr_unsigned(dp->d_fileno); 2923 bp += NFSX_UNSIGNED; 2924 nfsm_clget; 2925 *tl = txdr_unsigned(nlen); 2926 bp += NFSX_UNSIGNED; 2927 2928 /* And loop around copying the name */ 2929 xfer = nlen; 2930 cp = dp->d_name; 2931 while (xfer > 0) { 2932 nfsm_clget; 2933 if ((bp + xfer) > be) 2934 tsiz = be - bp; 2935 else 2936 tsiz = xfer; 2937 memcpy(bp, cp, tsiz); 2938 bp += tsiz; 2939 xfer -= tsiz; 2940 if (xfer > 0) 2941 cp += tsiz; 2942 } 2943 /* And null pad to an int32_t boundary */ 2944 for (i = 0; i < rem; i++) 2945 *bp++ = '\0'; 2946 2947 /* 2948 * Now copy the flrep structure out. 2949 */ 2950 xfer = sizeof (struct flrep); 2951 cp = (caddr_t)&fl; 2952 while (xfer > 0) { 2953 nfsm_clget; 2954 if ((bp + xfer) > be) 2955 tsiz = be - bp; 2956 else 2957 tsiz = xfer; 2958 memcpy(bp, cp, tsiz); 2959 bp += tsiz; 2960 xfer -= tsiz; 2961 if (xfer > 0) 2962 cp += tsiz; 2963 } 2964 } 2965 invalid: 2966 cpos += dp->d_reclen; 2967 dp = (struct dirent *)cpos; 2968 cookiep++; 2969 ncookies--; 2970 } 2971 vrele(vp); 2972 nfsm_clget; 2973 *tl = nfs_false; 2974 bp += NFSX_UNSIGNED; 2975 nfsm_clget; 2976 if (eofflag) 2977 *tl = nfs_true; 2978 else 2979 *tl = nfs_false; 2980 bp += NFSX_UNSIGNED; 2981 if (mp != mb) { 2982 if (bp < be) 2983 mp->m_len = bp - mtod(mp, caddr_t); 2984 } else 2985 mp->m_len += bp - bpos; 2986 free((caddr_t)cookies, M_TEMP); 2987 free((caddr_t)rbuf, M_TEMP); 2988 nfsm_srvdone; 2989 } 2990 2991 /* 2992 * nfs commit service 2993 */ 2994 int 2995 nfsrv_commit(nfsd, slp, procp, mrq) 2996 struct nfsrv_descript *nfsd; 2997 struct nfssvc_sock *slp; 2998 struct proc *procp; 2999 struct mbuf **mrq; 3000 { 3001 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3002 struct mbuf *nam = nfsd->nd_nam; 3003 caddr_t dpos = nfsd->nd_dpos; 3004 struct ucred *cred = &nfsd->nd_cr; 3005 struct vattr bfor, aft; 3006 struct vnode *vp; 3007 nfsfh_t nfh; 3008 fhandle_t *fhp; 3009 u_int32_t *tl; 3010 int32_t t1; 3011 caddr_t bpos; 3012 int error = 0, rdonly, for_ret = 1, aft_ret = 1, cnt, cache; 3013 char *cp2; 3014 struct mbuf *mb, *mreq; 3015 u_quad_t frev, off, end; 3016 3017 #ifndef nolint 3018 cache = 0; 3019 #endif 3020 fhp = &nfh.fh_generic; 3021 nfsm_srvmtofh(fhp); 3022 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 3023 3024 off = fxdr_hyper(tl); 3025 tl += 2; 3026 cnt = fxdr_unsigned(int, *tl); 3027 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 3028 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 3029 if (error) { 3030 nfsm_reply(2 * NFSX_UNSIGNED); 3031 nfsm_srvwcc_data(for_ret, &bfor, aft_ret, &aft); 3032 return (0); 3033 } 3034 for_ret = VOP_GETATTR(vp, &bfor, cred, procp); 3035 end = (cnt > 0) ? off + cnt : vp->v_size; 3036 if (end < off || end > vp->v_size) 3037 end = vp->v_size; 3038 error = VOP_FSYNC(vp, cred, FSYNC_WAIT, off, end, procp); 3039 aft_ret = VOP_GETATTR(vp, &aft, cred, procp); 3040 vput(vp); 3041 nfsm_reply(NFSX_V3WCCDATA + NFSX_V3WRITEVERF); 3042 nfsm_srvwcc_data(for_ret, &bfor, aft_ret, &aft); 3043 if (!error) { 3044 nfsm_build(tl, u_int32_t *, NFSX_V3WRITEVERF); 3045 *tl++ = txdr_unsigned(boottime.tv_sec); 3046 *tl = txdr_unsigned(boottime.tv_usec); 3047 } else 3048 return (0); 3049 nfsm_srvdone; 3050 } 3051 3052 /* 3053 * nfs statfs service 3054 */ 3055 int 3056 nfsrv_statfs(nfsd, slp, procp, mrq) 3057 struct nfsrv_descript *nfsd; 3058 struct nfssvc_sock *slp; 3059 struct proc *procp; 3060 struct mbuf **mrq; 3061 { 3062 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3063 struct mbuf *nam = nfsd->nd_nam; 3064 caddr_t dpos = nfsd->nd_dpos; 3065 struct ucred *cred = &nfsd->nd_cr; 3066 struct statfs *sf; 3067 struct nfs_statfs *sfp; 3068 u_int32_t *tl; 3069 int32_t t1; 3070 caddr_t bpos; 3071 int error = 0, rdonly, cache, getret = 1; 3072 int v3 = (nfsd->nd_flag & ND_NFSV3); 3073 char *cp2; 3074 struct mbuf *mb, *mreq; 3075 struct vnode *vp; 3076 struct vattr at; 3077 nfsfh_t nfh; 3078 fhandle_t *fhp; 3079 struct statfs statfs; 3080 u_quad_t frev, tval; 3081 3082 #ifndef nolint 3083 cache = 0; 3084 #endif 3085 fhp = &nfh.fh_generic; 3086 nfsm_srvmtofh(fhp); 3087 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 3088 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 3089 if (error) { 3090 nfsm_reply(NFSX_UNSIGNED); 3091 nfsm_srvpostop_attr(getret, &at); 3092 return (0); 3093 } 3094 sf = &statfs; 3095 error = VFS_STATFS(vp->v_mount, sf, procp); 3096 getret = VOP_GETATTR(vp, &at, cred, procp); 3097 vput(vp); 3098 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_STATFS(v3)); 3099 if (v3) 3100 nfsm_srvpostop_attr(getret, &at); 3101 if (error) 3102 return (0); 3103 nfsm_build(sfp, struct nfs_statfs *, NFSX_STATFS(v3)); 3104 if (v3) { 3105 tval = (u_quad_t)((quad_t)sf->f_blocks * (quad_t)sf->f_bsize); 3106 txdr_hyper(tval, &sfp->sf_tbytes); 3107 tval = (u_quad_t)((quad_t)sf->f_bfree * (quad_t)sf->f_bsize); 3108 txdr_hyper(tval, &sfp->sf_fbytes); 3109 tval = (u_quad_t)((quad_t)sf->f_bavail * (quad_t)sf->f_bsize); 3110 txdr_hyper(tval, &sfp->sf_abytes); 3111 tval = (u_quad_t)sf->f_files; 3112 txdr_hyper(tval, &sfp->sf_tfiles); 3113 tval = (u_quad_t)sf->f_ffree; 3114 txdr_hyper(tval, &sfp->sf_ffiles); 3115 txdr_hyper(tval, &sfp->sf_afiles); 3116 sfp->sf_invarsec = 0; 3117 } else { 3118 sfp->sf_tsize = txdr_unsigned(NFS_MAXDGRAMDATA); 3119 sfp->sf_bsize = txdr_unsigned(sf->f_bsize); 3120 sfp->sf_blocks = txdr_unsigned(sf->f_blocks); 3121 sfp->sf_bfree = txdr_unsigned(sf->f_bfree); 3122 sfp->sf_bavail = txdr_unsigned(sf->f_bavail); 3123 } 3124 nfsm_srvdone; 3125 } 3126 3127 /* 3128 * nfs fsinfo service 3129 */ 3130 int 3131 nfsrv_fsinfo(nfsd, slp, procp, mrq) 3132 struct nfsrv_descript *nfsd; 3133 struct nfssvc_sock *slp; 3134 struct proc *procp; 3135 struct mbuf **mrq; 3136 { 3137 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3138 struct mbuf *nam = nfsd->nd_nam; 3139 caddr_t dpos = nfsd->nd_dpos; 3140 struct ucred *cred = &nfsd->nd_cr; 3141 u_int32_t *tl; 3142 struct nfsv3_fsinfo *sip; 3143 int32_t t1; 3144 caddr_t bpos; 3145 int error = 0, rdonly, cache, getret = 1; 3146 uint32_t maxdata; 3147 char *cp2; 3148 struct mbuf *mb, *mreq; 3149 struct vnode *vp; 3150 struct vattr at; 3151 nfsfh_t nfh; 3152 fhandle_t *fhp; 3153 u_quad_t frev, maxfsize; 3154 struct statfs sb; 3155 3156 #ifndef nolint 3157 cache = 0; 3158 #endif 3159 fhp = &nfh.fh_generic; 3160 nfsm_srvmtofh(fhp); 3161 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 3162 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 3163 if (error) { 3164 nfsm_reply(NFSX_UNSIGNED); 3165 nfsm_srvpostop_attr(getret, &at); 3166 return (0); 3167 } 3168 3169 /* XXX Try to make a guess on the max file size. */ 3170 VFS_STATFS(vp->v_mount, &sb, (struct proc *)0); 3171 maxfsize = (u_quad_t)0x80000000 * sb.f_bsize - 1; 3172 3173 getret = VOP_GETATTR(vp, &at, cred, procp); 3174 vput(vp); 3175 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3FSINFO); 3176 nfsm_srvpostop_attr(getret, &at); 3177 nfsm_build(sip, struct nfsv3_fsinfo *, NFSX_V3FSINFO); 3178 3179 /* 3180 * XXX 3181 * There should be file system VFS OP(s) to get this information. 3182 * For now, assume ufs. 3183 */ 3184 if (slp->ns_so->so_type == SOCK_DGRAM) 3185 maxdata = NFS_MAXDGRAMDATA; 3186 else 3187 maxdata = NFS_MAXDATA; 3188 sip->fs_rtmax = txdr_unsigned(maxdata); 3189 sip->fs_rtpref = txdr_unsigned(maxdata); 3190 sip->fs_rtmult = txdr_unsigned(NFS_FABLKSIZE); 3191 sip->fs_wtmax = txdr_unsigned(maxdata); 3192 sip->fs_wtpref = txdr_unsigned(maxdata); 3193 sip->fs_wtmult = txdr_unsigned(NFS_FABLKSIZE); 3194 sip->fs_dtpref = txdr_unsigned(maxdata); 3195 txdr_hyper(maxfsize, &sip->fs_maxfilesize); 3196 sip->fs_timedelta.nfsv3_sec = 0; 3197 sip->fs_timedelta.nfsv3_nsec = txdr_unsigned(1); 3198 sip->fs_properties = txdr_unsigned(NFSV3FSINFO_LINK | 3199 NFSV3FSINFO_SYMLINK | NFSV3FSINFO_HOMOGENEOUS | 3200 NFSV3FSINFO_CANSETTIME); 3201 nfsm_srvdone; 3202 } 3203 3204 /* 3205 * nfs pathconf service 3206 */ 3207 int 3208 nfsrv_pathconf(nfsd, slp, procp, mrq) 3209 struct nfsrv_descript *nfsd; 3210 struct nfssvc_sock *slp; 3211 struct proc *procp; 3212 struct mbuf **mrq; 3213 { 3214 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3215 struct mbuf *nam = nfsd->nd_nam; 3216 caddr_t dpos = nfsd->nd_dpos; 3217 struct ucred *cred = &nfsd->nd_cr; 3218 u_int32_t *tl; 3219 struct nfsv3_pathconf *pc; 3220 int32_t t1; 3221 caddr_t bpos; 3222 int error = 0, rdonly, cache, getret = 1; 3223 register_t linkmax, namemax, chownres, notrunc; 3224 char *cp2; 3225 struct mbuf *mb, *mreq; 3226 struct vnode *vp; 3227 struct vattr at; 3228 nfsfh_t nfh; 3229 fhandle_t *fhp; 3230 u_quad_t frev; 3231 3232 #ifndef nolint 3233 cache = 0; 3234 #endif 3235 fhp = &nfh.fh_generic; 3236 nfsm_srvmtofh(fhp); 3237 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 3238 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 3239 if (error) { 3240 nfsm_reply(NFSX_UNSIGNED); 3241 nfsm_srvpostop_attr(getret, &at); 3242 return (0); 3243 } 3244 error = VOP_PATHCONF(vp, _PC_LINK_MAX, &linkmax); 3245 if (!error) 3246 error = VOP_PATHCONF(vp, _PC_NAME_MAX, &namemax); 3247 if (!error) 3248 error = VOP_PATHCONF(vp, _PC_CHOWN_RESTRICTED, &chownres); 3249 if (!error) 3250 error = VOP_PATHCONF(vp, _PC_NO_TRUNC, ¬runc); 3251 getret = VOP_GETATTR(vp, &at, cred, procp); 3252 vput(vp); 3253 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3PATHCONF); 3254 nfsm_srvpostop_attr(getret, &at); 3255 if (error) 3256 return (0); 3257 nfsm_build(pc, struct nfsv3_pathconf *, NFSX_V3PATHCONF); 3258 3259 pc->pc_linkmax = txdr_unsigned(linkmax); 3260 pc->pc_namemax = txdr_unsigned(namemax); 3261 pc->pc_notrunc = txdr_unsigned(notrunc); 3262 pc->pc_chownrestricted = txdr_unsigned(chownres); 3263 3264 /* 3265 * These should probably be supported by VOP_PATHCONF(), but 3266 * until msdosfs is exportable (why would you want to?), the 3267 * Unix defaults should be ok. 3268 */ 3269 pc->pc_caseinsensitive = nfs_false; 3270 pc->pc_casepreserving = nfs_true; 3271 nfsm_srvdone; 3272 } 3273 3274 /* 3275 * Null operation, used by clients to ping server 3276 */ 3277 /* ARGSUSED */ 3278 int 3279 nfsrv_null(nfsd, slp, procp, mrq) 3280 struct nfsrv_descript *nfsd; 3281 struct nfssvc_sock *slp; 3282 struct proc *procp; 3283 struct mbuf **mrq; 3284 { 3285 struct mbuf *mrep = nfsd->nd_mrep; 3286 caddr_t bpos; 3287 int error = NFSERR_RETVOID, cache = 0; 3288 struct mbuf *mb, *mreq; 3289 u_quad_t frev; 3290 3291 nfsm_reply(0); 3292 return (0); 3293 } 3294 3295 /* 3296 * No operation, used for obsolete procedures 3297 */ 3298 /* ARGSUSED */ 3299 int 3300 nfsrv_noop(nfsd, slp, procp, mrq) 3301 struct nfsrv_descript *nfsd; 3302 struct nfssvc_sock *slp; 3303 struct proc *procp; 3304 struct mbuf **mrq; 3305 { 3306 struct mbuf *mrep = nfsd->nd_mrep; 3307 caddr_t bpos; 3308 int error, cache = 0; 3309 struct mbuf *mb, *mreq; 3310 u_quad_t frev; 3311 3312 if (nfsd->nd_repstat) 3313 error = nfsd->nd_repstat; 3314 else 3315 error = EPROCUNAVAIL; 3316 nfsm_reply(0); 3317 return (0); 3318 } 3319 3320 /* 3321 * Perform access checking for vnodes obtained from file handles that would 3322 * refer to files already opened by a Unix client. You cannot just use 3323 * vn_writechk() and VOP_ACCESS() for two reasons. 3324 * 1 - You must check for exported rdonly as well as MNT_RDONLY for the write case 3325 * 2 - The owner is to be given access irrespective of mode bits for some 3326 * operations, so that processes that chmod after opening a file don't 3327 * break. I don't like this because it opens a security hole, but since 3328 * the nfs server opens a security hole the size of a barn door anyhow, 3329 * what the heck. 3330 * 3331 * The exception to rule 2 is EPERM. If a file is IMMUTABLE, VOP_ACCESS() 3332 * will return EPERM instead of EACCESS. EPERM is always an error. 3333 */ 3334 int 3335 nfsrv_access(vp, flags, cred, rdonly, p, override) 3336 struct vnode *vp; 3337 int flags; 3338 struct ucred *cred; 3339 int rdonly; 3340 struct proc *p; 3341 { 3342 struct vattr vattr; 3343 int error; 3344 if (flags & VWRITE) { 3345 /* Just vn_writechk() changed to check rdonly */ 3346 /* 3347 * Disallow write attempts on read-only file systems; 3348 * unless the file is a socket or a block or character 3349 * device resident on the file system. 3350 */ 3351 if (rdonly || (vp->v_mount->mnt_flag & MNT_RDONLY)) { 3352 switch (vp->v_type) { 3353 case VREG: 3354 case VDIR: 3355 case VLNK: 3356 return (EROFS); 3357 default: 3358 break; 3359 } 3360 } 3361 3362 /* 3363 * If the vnode is in use as a process's text, 3364 * we can't allow writing. 3365 */ 3366 if (vp->v_flag & VTEXT) 3367 return (ETXTBSY); 3368 } 3369 error = VOP_GETATTR(vp, &vattr, cred, p); 3370 if (error) 3371 return (error); 3372 error = VOP_ACCESS(vp, flags, cred, p); 3373 /* 3374 * Allow certain operations for the owner (reads and writes 3375 * on files that are already open). 3376 */ 3377 if (override && error == EACCES && cred->cr_uid == vattr.va_uid) 3378 error = 0; 3379 return error; 3380 } 3381
Indexes created Thu Oct 02 14:10:14 GMT 2025