nfs_serv.c revision 1.47
1 /* $NetBSD: nfs_serv.c,v 1.47 1999/03/05 07:27:58 mycroft Exp $ */ 2 3 /* 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Rick Macklem at The University of Guelph. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)nfs_serv.c 8.8 (Berkeley) 7/31/95 39 */ 40 41 /* 42 * nfs version 2 and 3 server calls to vnode ops 43 * - these routines generally have 3 phases 44 * 1 - break down and validate rpc request in mbuf list 45 * 2 - do the vnode ops for the request 46 * (surprisingly ?? many are very similar to syscalls in vfs_syscalls.c) 47 * 3 - build the rpc reply in an mbuf list 48 * nb: 49 * - do not mix the phases, since the nfsm_?? macros can return failures 50 * on a bad rpc or similar and do not do any vrele() or vput()'s 51 * 52 * - the nfsm_reply() macro generates an nfs rpc reply with the nfs 53 * error number iff error != 0 whereas 54 * returning an error from the server function implies a fatal error 55 * such as a badly constructed rpc request that should be dropped without 56 * a reply. 57 * For Version 3, nfsm_reply() does not return for the error case, since 58 * most version 3 rpcs return more than the status for error cases. 59 */ 60 61 #include "opt_uvm.h" 62 63 #include <sys/param.h> 64 #include <sys/systm.h> 65 #include <sys/proc.h> 66 #include <sys/file.h> 67 #include <sys/namei.h> 68 #include <sys/vnode.h> 69 #include <sys/mount.h> 70 #include <sys/socket.h> 71 #include <sys/socketvar.h> 72 #include <sys/mbuf.h> 73 #include <sys/dirent.h> 74 #include <sys/stat.h> 75 #include <sys/kernel.h> 76 #include <ufs/ufs/dir.h> 77 78 #include <vm/vm.h> 79 80 #if defined(UVM) 81 #include <uvm/uvm_extern.h> 82 #endif 83 84 #include <nfs/nfsproto.h> 85 #include <nfs/rpcv2.h> 86 #include <nfs/nfs.h> 87 #include <nfs/xdr_subs.h> 88 #include <nfs/nfsm_subs.h> 89 #include <nfs/nqnfs.h> 90 #include <nfs/nfs_var.h> 91 92 /* Global vars */ 93 extern u_int32_t nfs_xdrneg1; 94 extern u_int32_t nfs_false, nfs_true; 95 extern enum vtype nv3tov_type[8]; 96 extern struct nfsstats nfsstats; 97 extern nfstype nfsv2_type[9]; 98 extern nfstype nfsv3_type[9]; 99 extern struct nfs_public nfs_pub; 100 int nfsrvw_procrastinate = NFS_GATHERDELAY * 1000; 101 102 /* 103 * nfs v3 access service 104 */ 105 int 106 nfsrv3_access(nfsd, slp, procp, mrq) 107 struct nfsrv_descript *nfsd; 108 struct nfssvc_sock *slp; 109 struct proc *procp; 110 struct mbuf **mrq; 111 { 112 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 113 struct mbuf *nam = nfsd->nd_nam; 114 caddr_t dpos = nfsd->nd_dpos; 115 struct ucred *cred = &nfsd->nd_cr; 116 struct vnode *vp; 117 nfsfh_t nfh; 118 fhandle_t *fhp; 119 register u_int32_t *tl; 120 register int32_t t1; 121 caddr_t bpos; 122 int error = 0, rdonly, cache = 0, getret; 123 char *cp2; 124 struct mbuf *mb, *mreq, *mb2; 125 struct vattr va; 126 u_long inmode, testmode, outmode; 127 u_quad_t frev; 128 129 fhp = &nfh.fh_generic; 130 nfsm_srvmtofh(fhp); 131 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 132 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, &rdonly, 133 (nfsd->nd_flag & ND_KERBAUTH), FALSE); 134 if (error) { 135 nfsm_reply(NFSX_UNSIGNED); 136 nfsm_srvpostop_attr(1, (struct vattr *)0); 137 return (0); 138 } 139 inmode = fxdr_unsigned(u_int32_t, *tl); 140 outmode = 0; 141 if ((inmode & NFSV3ACCESS_READ) && 142 nfsrv_access(vp, VREAD, cred, rdonly, procp, 0) == 0) 143 outmode |= NFSV3ACCESS_READ; 144 if (vp->v_type != VDIR) { 145 testmode = inmode & (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND); 146 if (testmode && 147 nfsrv_access(vp, VWRITE, cred, rdonly, procp, 0) == 0) 148 outmode |= testmode; 149 if ((inmode & NFSV3ACCESS_EXECUTE) && 150 nfsrv_access(vp, VEXEC, cred, rdonly, procp, 0) == 0) 151 outmode |= NFSV3ACCESS_EXECUTE; 152 } else { 153 testmode = inmode & (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | 154 NFSV3ACCESS_DELETE); 155 if (testmode && 156 nfsrv_access(vp, VWRITE, cred, rdonly, procp, 0) == 0) 157 outmode |= testmode; 158 if ((inmode & NFSV3ACCESS_LOOKUP) && 159 nfsrv_access(vp, VEXEC, cred, rdonly, procp, 0) == 0) 160 outmode |= NFSV3ACCESS_LOOKUP; 161 } 162 getret = VOP_GETATTR(vp, &va, cred, procp); 163 vput(vp); 164 nfsm_reply(NFSX_POSTOPATTR(1) + NFSX_UNSIGNED); 165 nfsm_srvpostop_attr(getret, &va); 166 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 167 *tl = txdr_unsigned(outmode); 168 nfsm_srvdone; 169 } 170 171 /* 172 * nfs getattr service 173 */ 174 int 175 nfsrv_getattr(nfsd, slp, procp, mrq) 176 struct nfsrv_descript *nfsd; 177 struct nfssvc_sock *slp; 178 struct proc *procp; 179 struct mbuf **mrq; 180 { 181 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 182 struct mbuf *nam = nfsd->nd_nam; 183 caddr_t dpos = nfsd->nd_dpos; 184 struct ucred *cred = &nfsd->nd_cr; 185 register struct nfs_fattr *fp; 186 struct vattr va; 187 struct vnode *vp; 188 nfsfh_t nfh; 189 fhandle_t *fhp; 190 register u_int32_t *tl; 191 register int32_t t1; 192 caddr_t bpos; 193 int error = 0, rdonly, cache; 194 char *cp2; 195 struct mbuf *mb, *mb2, *mreq; 196 u_quad_t frev; 197 198 fhp = &nfh.fh_generic; 199 nfsm_srvmtofh(fhp); 200 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, &rdonly, 201 (nfsd->nd_flag & ND_KERBAUTH), FALSE); 202 if (error) { 203 nfsm_reply(0); 204 return (0); 205 } 206 nqsrv_getl(vp, ND_READ); 207 error = VOP_GETATTR(vp, &va, cred, procp); 208 vput(vp); 209 nfsm_reply(NFSX_FATTR(nfsd->nd_flag & ND_NFSV3)); 210 if (error) 211 return (0); 212 nfsm_build(fp, struct nfs_fattr *, NFSX_FATTR(nfsd->nd_flag & ND_NFSV3)); 213 nfsm_srvfillattr(&va, fp); 214 nfsm_srvdone; 215 } 216 217 /* 218 * nfs setattr service 219 */ 220 int 221 nfsrv_setattr(nfsd, slp, procp, mrq) 222 struct nfsrv_descript *nfsd; 223 struct nfssvc_sock *slp; 224 struct proc *procp; 225 struct mbuf **mrq; 226 { 227 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 228 struct mbuf *nam = nfsd->nd_nam; 229 caddr_t dpos = nfsd->nd_dpos; 230 struct ucred *cred = &nfsd->nd_cr; 231 struct vattr va, preat; 232 register struct nfsv2_sattr *sp; 233 register struct nfs_fattr *fp; 234 struct vnode *vp; 235 nfsfh_t nfh; 236 fhandle_t *fhp; 237 register u_int32_t *tl; 238 register int32_t t1; 239 caddr_t bpos; 240 int error = 0, rdonly, cache, preat_ret = 1, postat_ret = 1; 241 int v3 = (nfsd->nd_flag & ND_NFSV3), gcheck = 0; 242 char *cp2; 243 struct mbuf *mb, *mb2, *mreq; 244 u_quad_t frev; 245 struct timespec guard; 246 247 fhp = &nfh.fh_generic; 248 nfsm_srvmtofh(fhp); 249 VATTR_NULL(&va); 250 if (v3) { 251 nfsm_srvsattr(&va); 252 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 253 gcheck = fxdr_unsigned(int, *tl); 254 if (gcheck) { 255 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 256 fxdr_nfsv3time(tl, &guard); 257 } 258 } else { 259 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 260 /* 261 * Nah nah nah nah na nah 262 * There is a bug in the Sun client that puts 0xffff in the mode 263 * field of sattr when it should put in 0xffffffff. The u_short 264 * doesn't sign extend. 265 * --> check the low order 2 bytes for 0xffff 266 */ 267 if ((fxdr_unsigned(int, sp->sa_mode) & 0xffff) != 0xffff) 268 va.va_mode = nfstov_mode(sp->sa_mode); 269 if (sp->sa_uid != nfs_xdrneg1) 270 va.va_uid = fxdr_unsigned(uid_t, sp->sa_uid); 271 if (sp->sa_gid != nfs_xdrneg1) 272 va.va_gid = fxdr_unsigned(gid_t, sp->sa_gid); 273 if (sp->sa_size != nfs_xdrneg1) 274 va.va_size = fxdr_unsigned(u_quad_t, sp->sa_size); 275 if (sp->sa_atime.nfsv2_sec != nfs_xdrneg1) { 276 #ifdef notyet 277 fxdr_nfsv2time(&sp->sa_atime, &va.va_atime); 278 #else 279 va.va_atime.tv_sec = 280 fxdr_unsigned(u_int32_t,sp->sa_atime.nfsv2_sec); 281 va.va_atime.tv_nsec = 0; 282 #endif 283 } 284 if (sp->sa_mtime.nfsv2_sec != nfs_xdrneg1) 285 fxdr_nfsv2time(&sp->sa_mtime, &va.va_mtime); 286 287 } 288 289 /* 290 * Now that we have all the fields, lets do it. 291 */ 292 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, &rdonly, 293 (nfsd->nd_flag & ND_KERBAUTH), FALSE); 294 if (error) { 295 nfsm_reply(2 * NFSX_UNSIGNED); 296 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 297 return (0); 298 } 299 nqsrv_getl(vp, ND_WRITE); 300 if (v3) { 301 error = preat_ret = VOP_GETATTR(vp, &preat, cred, procp); 302 if (!error && gcheck && 303 (preat.va_ctime.tv_sec != guard.tv_sec || 304 preat.va_ctime.tv_nsec != guard.tv_nsec)) 305 error = NFSERR_NOT_SYNC; 306 if (error) { 307 vput(vp); 308 nfsm_reply(NFSX_WCCDATA(v3)); 309 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 310 return (0); 311 } 312 } 313 314 /* 315 * If the size is being changed write acces is required, otherwise 316 * just check for a read only file system. 317 */ 318 if (va.va_size == ((u_quad_t)((quad_t) -1))) { 319 if (rdonly || (vp->v_mount->mnt_flag & MNT_RDONLY)) { 320 error = EROFS; 321 goto out; 322 } 323 } else { 324 if (vp->v_type == VDIR) { 325 error = EISDIR; 326 goto out; 327 } else if ((error = nfsrv_access(vp, VWRITE, cred, rdonly, 328 procp, 0)) != 0) 329 goto out; 330 } 331 error = VOP_SETATTR(vp, &va, cred, procp); 332 postat_ret = VOP_GETATTR(vp, &va, cred, procp); 333 if (!error) 334 error = postat_ret; 335 out: 336 vput(vp); 337 nfsm_reply(NFSX_WCCORFATTR(v3)); 338 if (v3) { 339 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 340 return (0); 341 } else { 342 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 343 nfsm_srvfillattr(&va, fp); 344 } 345 nfsm_srvdone; 346 } 347 348 /* 349 * nfs lookup rpc 350 */ 351 int 352 nfsrv_lookup(nfsd, slp, procp, mrq) 353 struct nfsrv_descript *nfsd; 354 struct nfssvc_sock *slp; 355 struct proc *procp; 356 struct mbuf **mrq; 357 { 358 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 359 struct mbuf *nam = nfsd->nd_nam; 360 caddr_t dpos = nfsd->nd_dpos; 361 struct ucred *cred = &nfsd->nd_cr; 362 register struct nfs_fattr *fp; 363 struct nameidata nd, ind, *ndp = &nd; 364 struct vnode *vp, *dirp; 365 nfsfh_t nfh; 366 fhandle_t *fhp; 367 register caddr_t cp; 368 register u_int32_t *tl; 369 register int32_t t1; 370 caddr_t bpos; 371 int error = 0, cache, len, dirattr_ret = 1; 372 int v3 = (nfsd->nd_flag & ND_NFSV3), pubflag; 373 char *cp2; 374 struct mbuf *mb, *mb2, *mreq; 375 struct vattr va, dirattr; 376 u_quad_t frev; 377 378 fhp = &nfh.fh_generic; 379 nfsm_srvmtofh(fhp); 380 nfsm_srvnamesiz(len); 381 382 pubflag = nfs_ispublicfh(fhp); 383 384 nd.ni_cnd.cn_cred = cred; 385 nd.ni_cnd.cn_nameiop = LOOKUP; 386 nd.ni_cnd.cn_flags = LOCKLEAF | SAVESTART; 387 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 388 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), pubflag); 389 390 if (!error && pubflag) { 391 if (nd.ni_vp->v_type == VDIR && nfs_pub.np_index != NULL) { 392 /* 393 * Setup call to lookup() to see if we can find 394 * the index file. Arguably, this doesn't belong 395 * in a kernel.. Ugh. 396 */ 397 ind = nd; 398 VOP_UNLOCK(nd.ni_vp, 0); 399 ind.ni_pathlen = strlen(nfs_pub.np_index); 400 ind.ni_cnd.cn_nameptr = ind.ni_cnd.cn_pnbuf = 401 nfs_pub.np_index; 402 ind.ni_startdir = nd.ni_vp; 403 VREF(ind.ni_startdir); 404 error = lookup(&ind); 405 if (!error) { 406 /* 407 * Found an index file. Get rid of 408 * the old references. 409 */ 410 if (dirp) 411 vrele(dirp); 412 dirp = nd.ni_vp; 413 vrele(nd.ni_startdir); 414 ndp = &ind; 415 } else 416 error = 0; 417 } 418 /* 419 * If the public filehandle was used, check that this lookup 420 * didn't result in a filehandle outside the publicly exported 421 * filesystem. 422 */ 423 424 if (!error && ndp->ni_vp->v_mount != nfs_pub.np_mount) { 425 vput(nd.ni_vp); 426 error = EPERM; 427 } 428 } 429 430 if (dirp) { 431 if (v3) 432 dirattr_ret = VOP_GETATTR(dirp, &dirattr, cred, 433 procp); 434 vrele(dirp); 435 } 436 437 if (error) { 438 nfsm_reply(NFSX_POSTOPATTR(v3)); 439 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 440 return (0); 441 } 442 443 nqsrv_getl(ndp->ni_startdir, ND_READ); 444 vrele(ndp->ni_startdir); 445 FREE(nd.ni_cnd.cn_pnbuf, M_NAMEI); 446 vp = ndp->ni_vp; 447 memset((caddr_t)fhp, 0, sizeof(nfh)); 448 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; 449 error = VFS_VPTOFH(vp, &fhp->fh_fid); 450 if (!error) 451 error = VOP_GETATTR(vp, &va, cred, procp); 452 vput(vp); 453 nfsm_reply(NFSX_SRVFH(v3) + NFSX_POSTOPORFATTR(v3) + NFSX_POSTOPATTR(v3)); 454 if (error) { 455 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 456 return (0); 457 } 458 nfsm_srvfhtom(fhp, v3); 459 if (v3) { 460 nfsm_srvpostop_attr(0, &va); 461 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 462 } else { 463 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 464 nfsm_srvfillattr(&va, fp); 465 } 466 nfsm_srvdone; 467 } 468 469 /* 470 * nfs readlink service 471 */ 472 int 473 nfsrv_readlink(nfsd, slp, procp, mrq) 474 struct nfsrv_descript *nfsd; 475 struct nfssvc_sock *slp; 476 struct proc *procp; 477 struct mbuf **mrq; 478 { 479 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 480 struct mbuf *nam = nfsd->nd_nam; 481 caddr_t dpos = nfsd->nd_dpos; 482 struct ucred *cred = &nfsd->nd_cr; 483 struct iovec iv[(NFS_MAXPATHLEN+MLEN-1)/MLEN]; 484 register struct iovec *ivp = iv; 485 register struct mbuf *mp; 486 register u_int32_t *tl; 487 register int32_t t1; 488 caddr_t bpos; 489 int error = 0, rdonly, cache, i, tlen, len, getret; 490 int v3 = (nfsd->nd_flag & ND_NFSV3); 491 char *cp2; 492 struct mbuf *mb, *mb2, *mp2 = NULL, *mp3 = NULL, *mreq; 493 struct vnode *vp; 494 struct vattr attr; 495 nfsfh_t nfh; 496 fhandle_t *fhp; 497 struct uio io, *uiop = &io; 498 u_quad_t frev; 499 500 fhp = &nfh.fh_generic; 501 nfsm_srvmtofh(fhp); 502 len = 0; 503 i = 0; 504 while (len < NFS_MAXPATHLEN) { 505 MGET(mp, M_WAIT, MT_DATA); 506 MCLGET(mp, M_WAIT); 507 mp->m_len = NFSMSIZ(mp); 508 if (len == 0) 509 mp3 = mp2 = mp; 510 else { 511 mp2->m_next = mp; 512 mp2 = mp; 513 } 514 if ((len+mp->m_len) > NFS_MAXPATHLEN) { 515 mp->m_len = NFS_MAXPATHLEN-len; 516 len = NFS_MAXPATHLEN; 517 } else 518 len += mp->m_len; 519 ivp->iov_base = mtod(mp, caddr_t); 520 ivp->iov_len = mp->m_len; 521 i++; 522 ivp++; 523 } 524 uiop->uio_iov = iv; 525 uiop->uio_iovcnt = i; 526 uiop->uio_offset = 0; 527 uiop->uio_resid = len; 528 uiop->uio_rw = UIO_READ; 529 uiop->uio_segflg = UIO_SYSSPACE; 530 uiop->uio_procp = (struct proc *)0; 531 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 532 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 533 if (error) { 534 m_freem(mp3); 535 nfsm_reply(2 * NFSX_UNSIGNED); 536 nfsm_srvpostop_attr(1, (struct vattr *)0); 537 return (0); 538 } 539 if (vp->v_type != VLNK) { 540 if (v3) 541 error = EINVAL; 542 else 543 error = ENXIO; 544 goto out; 545 } 546 nqsrv_getl(vp, ND_READ); 547 error = VOP_READLINK(vp, uiop, cred); 548 out: 549 getret = VOP_GETATTR(vp, &attr, cred, procp); 550 vput(vp); 551 if (error) 552 m_freem(mp3); 553 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_UNSIGNED); 554 if (v3) { 555 nfsm_srvpostop_attr(getret, &attr); 556 if (error) 557 return (0); 558 } 559 if (uiop->uio_resid > 0) { 560 len -= uiop->uio_resid; 561 tlen = nfsm_rndup(len); 562 nfsm_adj(mp3, NFS_MAXPATHLEN-tlen, tlen-len); 563 } 564 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 565 *tl = txdr_unsigned(len); 566 mb->m_next = mp3; 567 nfsm_srvdone; 568 } 569 570 /* 571 * nfs read service 572 */ 573 int 574 nfsrv_read(nfsd, slp, procp, mrq) 575 struct nfsrv_descript *nfsd; 576 struct nfssvc_sock *slp; 577 struct proc *procp; 578 struct mbuf **mrq; 579 { 580 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 581 struct mbuf *nam = nfsd->nd_nam; 582 caddr_t dpos = nfsd->nd_dpos; 583 struct ucred *cred = &nfsd->nd_cr; 584 register struct iovec *iv; 585 struct iovec *iv2; 586 register struct mbuf *m; 587 register struct nfs_fattr *fp; 588 register u_int32_t *tl; 589 register int32_t t1; 590 register int i; 591 caddr_t bpos; 592 int error = 0, rdonly, cache, cnt, len, left, siz, tlen, getret; 593 int v3 = (nfsd->nd_flag & ND_NFSV3), reqlen; 594 char *cp2; 595 struct mbuf *mb, *mb2, *mreq; 596 struct mbuf *m2; 597 struct vnode *vp; 598 nfsfh_t nfh; 599 fhandle_t *fhp; 600 struct uio io, *uiop = &io; 601 struct vattr va; 602 off_t off; 603 u_quad_t frev; 604 605 fhp = &nfh.fh_generic; 606 nfsm_srvmtofh(fhp); 607 if (v3) { 608 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 609 fxdr_hyper(tl, &off); 610 } else { 611 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 612 off = (off_t)fxdr_unsigned(u_int32_t, *tl); 613 } 614 nfsm_srvstrsiz(reqlen, NFS_SRVMAXDATA(nfsd)); 615 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 616 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 617 if (error) { 618 nfsm_reply(2 * NFSX_UNSIGNED); 619 nfsm_srvpostop_attr(1, (struct vattr *)0); 620 return (0); 621 } 622 if (vp->v_type != VREG) { 623 if (v3) 624 error = EINVAL; 625 else 626 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 627 } 628 if (!error) { 629 nqsrv_getl(vp, ND_READ); 630 if ((error = nfsrv_access(vp, VREAD, cred, rdonly, procp, 1)) != 0) 631 error = nfsrv_access(vp, VEXEC, cred, rdonly, procp, 1); 632 } 633 getret = VOP_GETATTR(vp, &va, cred, procp); 634 if (!error) 635 error = getret; 636 if (error) { 637 vput(vp); 638 nfsm_reply(NFSX_POSTOPATTR(v3)); 639 nfsm_srvpostop_attr(getret, &va); 640 return (0); 641 } 642 if (off >= va.va_size) 643 cnt = 0; 644 else if ((off + reqlen) > va.va_size) 645 cnt = nfsm_rndup(va.va_size - off); 646 else 647 cnt = reqlen; 648 nfsm_reply(NFSX_POSTOPORFATTR(v3) + 3 * NFSX_UNSIGNED+nfsm_rndup(cnt)); 649 if (v3) { 650 nfsm_build(tl, u_int32_t *, NFSX_V3FATTR + 4 * NFSX_UNSIGNED); 651 *tl++ = nfs_true; 652 fp = (struct nfs_fattr *)tl; 653 tl += (NFSX_V3FATTR / sizeof (u_int32_t)); 654 } else { 655 nfsm_build(tl, u_int32_t *, NFSX_V2FATTR + NFSX_UNSIGNED); 656 fp = (struct nfs_fattr *)tl; 657 tl += (NFSX_V2FATTR / sizeof (u_int32_t)); 658 } 659 len = left = cnt; 660 if (cnt > 0) { 661 /* 662 * Generate the mbuf list with the uio_iov ref. to it. 663 */ 664 i = 0; 665 m = m2 = mb; 666 while (left > 0) { 667 siz = min(M_TRAILINGSPACE(m), left); 668 if (siz > 0) { 669 left -= siz; 670 i++; 671 } 672 if (left > 0) { 673 MGET(m, M_WAIT, MT_DATA); 674 MCLGET(m, M_WAIT); 675 m->m_len = 0; 676 m2->m_next = m; 677 m2 = m; 678 } 679 } 680 MALLOC(iv, struct iovec *, i * sizeof (struct iovec), 681 M_TEMP, M_WAITOK); 682 uiop->uio_iov = iv2 = iv; 683 m = mb; 684 left = cnt; 685 i = 0; 686 while (left > 0) { 687 if (m == NULL) 688 panic("nfsrv_read iov"); 689 siz = min(M_TRAILINGSPACE(m), left); 690 if (siz > 0) { 691 iv->iov_base = mtod(m, caddr_t) + m->m_len; 692 iv->iov_len = siz; 693 m->m_len += siz; 694 left -= siz; 695 iv++; 696 i++; 697 } 698 m = m->m_next; 699 } 700 uiop->uio_iovcnt = i; 701 uiop->uio_offset = off; 702 uiop->uio_resid = cnt; 703 uiop->uio_rw = UIO_READ; 704 uiop->uio_segflg = UIO_SYSSPACE; 705 error = VOP_READ(vp, uiop, IO_NODELOCKED, cred); 706 off = uiop->uio_offset; 707 FREE((caddr_t)iv2, M_TEMP); 708 if (error || (getret = VOP_GETATTR(vp, &va, cred, procp)) != 0){ 709 if (!error) 710 error = getret; 711 m_freem(mreq); 712 vput(vp); 713 nfsm_reply(NFSX_POSTOPATTR(v3)); 714 nfsm_srvpostop_attr(getret, &va); 715 return (0); 716 } 717 } else 718 uiop->uio_resid = 0; 719 vput(vp); 720 nfsm_srvfillattr(&va, fp); 721 len -= uiop->uio_resid; 722 tlen = nfsm_rndup(len); 723 if (cnt != tlen || tlen != len) 724 nfsm_adj(mb, cnt - tlen, tlen - len); 725 if (v3) { 726 *tl++ = txdr_unsigned(len); 727 if (len < reqlen) 728 *tl++ = nfs_true; 729 else 730 *tl++ = nfs_false; 731 } 732 *tl = txdr_unsigned(len); 733 nfsm_srvdone; 734 } 735 736 /* 737 * nfs write service 738 */ 739 int 740 nfsrv_write(nfsd, slp, procp, mrq) 741 struct nfsrv_descript *nfsd; 742 struct nfssvc_sock *slp; 743 struct proc *procp; 744 struct mbuf **mrq; 745 { 746 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 747 struct mbuf *nam = nfsd->nd_nam; 748 caddr_t dpos = nfsd->nd_dpos; 749 struct ucred *cred = &nfsd->nd_cr; 750 register struct iovec *ivp; 751 register int i, cnt; 752 register struct mbuf *mp; 753 register struct nfs_fattr *fp; 754 struct iovec *iv; 755 struct vattr va, forat; 756 register u_int32_t *tl; 757 register int32_t t1; 758 caddr_t bpos; 759 int error = 0, rdonly, cache, len, forat_ret = 1; 760 int ioflags, aftat_ret = 1, retlen, zeroing, adjust; 761 int stable = NFSV3WRITE_FILESYNC; 762 int v3 = (nfsd->nd_flag & ND_NFSV3); 763 char *cp2; 764 struct mbuf *mb, *mb2, *mreq; 765 struct vnode *vp; 766 nfsfh_t nfh; 767 fhandle_t *fhp; 768 struct uio io, *uiop = &io; 769 off_t off; 770 u_quad_t frev; 771 772 if (mrep == NULL) { 773 *mrq = NULL; 774 return (0); 775 } 776 fhp = &nfh.fh_generic; 777 nfsm_srvmtofh(fhp); 778 if (v3) { 779 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 780 fxdr_hyper(tl, &off); 781 tl += 3; 782 stable = fxdr_unsigned(int, *tl++); 783 } else { 784 nfsm_dissect(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 785 off = (off_t)fxdr_unsigned(u_int32_t, *++tl); 786 tl += 2; 787 } 788 retlen = len = fxdr_unsigned(int32_t, *tl); 789 cnt = i = 0; 790 791 /* 792 * For NFS Version 2, it is not obvious what a write of zero length 793 * should do, but I might as well be consistent with Version 3, 794 * which is to return ok so long as there are no permission problems. 795 */ 796 if (len > 0) { 797 zeroing = 1; 798 mp = mrep; 799 while (mp) { 800 if (mp == md) { 801 zeroing = 0; 802 adjust = dpos - mtod(mp, caddr_t); 803 mp->m_len -= adjust; 804 if (mp->m_len > 0 && adjust > 0) 805 NFSMADV(mp, adjust); 806 } 807 if (zeroing) 808 mp->m_len = 0; 809 else if (mp->m_len > 0) { 810 i += mp->m_len; 811 if (i > len) { 812 mp->m_len -= (i - len); 813 zeroing = 1; 814 } 815 if (mp->m_len > 0) 816 cnt++; 817 } 818 mp = mp->m_next; 819 } 820 } 821 if (len > NFS_MAXDATA || len < 0 || i < len) { 822 error = EIO; 823 nfsm_reply(2 * NFSX_UNSIGNED); 824 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 825 return (0); 826 } 827 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 828 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 829 if (error) { 830 nfsm_reply(2 * NFSX_UNSIGNED); 831 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 832 return (0); 833 } 834 if (v3) 835 forat_ret = VOP_GETATTR(vp, &forat, cred, procp); 836 if (vp->v_type != VREG) { 837 if (v3) 838 error = EINVAL; 839 else 840 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 841 } 842 if (!error) { 843 nqsrv_getl(vp, ND_WRITE); 844 error = nfsrv_access(vp, VWRITE, cred, rdonly, procp, 1); 845 } 846 if (error) { 847 vput(vp); 848 nfsm_reply(NFSX_WCCDATA(v3)); 849 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 850 return (0); 851 } 852 853 if (len > 0) { 854 MALLOC(ivp, struct iovec *, cnt * sizeof (struct iovec), M_TEMP, 855 M_WAITOK); 856 uiop->uio_iov = iv = ivp; 857 uiop->uio_iovcnt = cnt; 858 mp = mrep; 859 while (mp) { 860 if (mp->m_len > 0) { 861 ivp->iov_base = mtod(mp, caddr_t); 862 ivp->iov_len = mp->m_len; 863 ivp++; 864 } 865 mp = mp->m_next; 866 } 867 868 /* 869 * XXX 870 * The IO_METASYNC flag indicates that all metadata (and not just 871 * enough to ensure data integrity) mus be written to stable storage 872 * synchronously. 873 * (IO_METASYNC is not yet implemented in 4.4BSD-Lite.) 874 */ 875 if (stable == NFSV3WRITE_UNSTABLE) 876 ioflags = IO_NODELOCKED; 877 else if (stable == NFSV3WRITE_DATASYNC) 878 ioflags = (IO_SYNC | IO_NODELOCKED); 879 else 880 ioflags = (IO_METASYNC | IO_SYNC | IO_NODELOCKED); 881 uiop->uio_resid = len; 882 uiop->uio_rw = UIO_WRITE; 883 uiop->uio_segflg = UIO_SYSSPACE; 884 uiop->uio_procp = (struct proc *)0; 885 uiop->uio_offset = off; 886 error = VOP_WRITE(vp, uiop, ioflags, cred); 887 nfsstats.srvvop_writes++; 888 FREE((caddr_t)iv, M_TEMP); 889 } 890 aftat_ret = VOP_GETATTR(vp, &va, cred, procp); 891 vput(vp); 892 if (!error) 893 error = aftat_ret; 894 nfsm_reply(NFSX_PREOPATTR(v3) + NFSX_POSTOPORFATTR(v3) + 895 2 * NFSX_UNSIGNED + NFSX_WRITEVERF(v3)); 896 if (v3) { 897 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 898 if (error) 899 return (0); 900 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 901 *tl++ = txdr_unsigned(retlen); 902 if (stable == NFSV3WRITE_UNSTABLE) 903 *tl++ = txdr_unsigned(stable); 904 else 905 *tl++ = txdr_unsigned(NFSV3WRITE_FILESYNC); 906 /* 907 * Actually, there is no need to txdr these fields, 908 * but it may make the values more human readable, 909 * for debugging purposes. 910 */ 911 *tl++ = txdr_unsigned(boottime.tv_sec); 912 *tl = txdr_unsigned(boottime.tv_usec); 913 } else { 914 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 915 nfsm_srvfillattr(&va, fp); 916 } 917 nfsm_srvdone; 918 } 919 920 /* 921 * NFS write service with write gathering support. Called when 922 * nfsrvw_procrastinate > 0. 923 * See: Chet Juszczak, "Improving the Write Performance of an NFS Server", 924 * in Proc. of the Winter 1994 Usenix Conference, pg. 247-259, San Franscisco, 925 * Jan. 1994. 926 */ 927 int 928 nfsrv_writegather(ndp, slp, procp, mrq) 929 struct nfsrv_descript **ndp; 930 struct nfssvc_sock *slp; 931 struct proc *procp; 932 struct mbuf **mrq; 933 { 934 register struct iovec *ivp; 935 register struct mbuf *mp; 936 register struct nfsrv_descript *wp, *nfsd, *owp, *swp; 937 register struct nfs_fattr *fp; 938 register int i = 0; 939 struct iovec *iov; 940 struct nfsrvw_delayhash *wpp; 941 struct ucred *cred; 942 struct vattr va, forat; 943 register u_int32_t *tl; 944 register int32_t t1; 945 caddr_t bpos, dpos; 946 int error = 0, rdonly, cache, len = 0, forat_ret = 1; 947 int ioflags, aftat_ret = 1, s, adjust, v3, zeroing; 948 char *cp2; 949 struct mbuf *mb, *mb2, *mreq, *mrep, *md; 950 struct vnode *vp; 951 struct uio io, *uiop = &io; 952 u_quad_t frev, cur_usec; 953 954 *mrq = NULL; 955 if (*ndp) { 956 nfsd = *ndp; 957 *ndp = NULL; 958 mrep = nfsd->nd_mrep; 959 md = nfsd->nd_md; 960 dpos = nfsd->nd_dpos; 961 cred = &nfsd->nd_cr; 962 v3 = (nfsd->nd_flag & ND_NFSV3); 963 LIST_INIT(&nfsd->nd_coalesce); 964 nfsd->nd_mreq = NULL; 965 nfsd->nd_stable = NFSV3WRITE_FILESYNC; 966 cur_usec = (u_quad_t)time.tv_sec * 1000000 + (u_quad_t)time.tv_usec; 967 nfsd->nd_time = cur_usec + nfsrvw_procrastinate; 968 969 /* 970 * Now, get the write header.. 971 */ 972 nfsm_srvmtofh(&nfsd->nd_fh); 973 if (v3) { 974 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 975 fxdr_hyper(tl, &nfsd->nd_off); 976 tl += 3; 977 nfsd->nd_stable = fxdr_unsigned(int, *tl++); 978 } else { 979 nfsm_dissect(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 980 nfsd->nd_off = (off_t)fxdr_unsigned(u_int32_t, *++tl); 981 tl += 2; 982 } 983 len = fxdr_unsigned(int32_t, *tl); 984 nfsd->nd_len = len; 985 nfsd->nd_eoff = nfsd->nd_off + len; 986 987 /* 988 * Trim the header out of the mbuf list and trim off any trailing 989 * junk so that the mbuf list has only the write data. 990 */ 991 zeroing = 1; 992 i = 0; 993 mp = mrep; 994 while (mp) { 995 if (mp == md) { 996 zeroing = 0; 997 adjust = dpos - mtod(mp, caddr_t); 998 mp->m_len -= adjust; 999 if (mp->m_len > 0 && adjust > 0) 1000 NFSMADV(mp, adjust); 1001 } 1002 if (zeroing) 1003 mp->m_len = 0; 1004 else { 1005 i += mp->m_len; 1006 if (i > len) { 1007 mp->m_len -= (i - len); 1008 zeroing = 1; 1009 } 1010 } 1011 mp = mp->m_next; 1012 } 1013 if (len > NFS_MAXDATA || len < 0 || i < len) { 1014 nfsmout: 1015 m_freem(mrep); 1016 error = EIO; 1017 nfsm_writereply(2 * NFSX_UNSIGNED, v3); 1018 if (v3) 1019 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1020 nfsd->nd_mreq = mreq; 1021 nfsd->nd_mrep = NULL; 1022 nfsd->nd_time = 0; 1023 } 1024 1025 /* 1026 * Add this entry to the hash and time queues. 1027 */ 1028 s = splsoftclock(); 1029 owp = NULL; 1030 wp = slp->ns_tq.lh_first; 1031 while (wp && wp->nd_time < nfsd->nd_time) { 1032 owp = wp; 1033 wp = wp->nd_tq.le_next; 1034 } 1035 if (owp) { 1036 LIST_INSERT_AFTER(owp, nfsd, nd_tq); 1037 } else { 1038 LIST_INSERT_HEAD(&slp->ns_tq, nfsd, nd_tq); 1039 } 1040 if (nfsd->nd_mrep) { 1041 wpp = NWDELAYHASH(slp, nfsd->nd_fh.fh_fid.fid_data); 1042 owp = NULL; 1043 wp = wpp->lh_first; 1044 while (wp && 1045 memcmp((caddr_t)&nfsd->nd_fh, (caddr_t)&wp->nd_fh, NFSX_V3FH)) { 1046 owp = wp; 1047 wp = wp->nd_hash.le_next; 1048 } 1049 while (wp && wp->nd_off < nfsd->nd_off && 1050 !memcmp((caddr_t)&nfsd->nd_fh, (caddr_t)&wp->nd_fh, NFSX_V3FH)) { 1051 owp = wp; 1052 wp = wp->nd_hash.le_next; 1053 } 1054 if (owp) { 1055 LIST_INSERT_AFTER(owp, nfsd, nd_hash); 1056 1057 /* 1058 * Search the hash list for overlapping entries and 1059 * coalesce. 1060 */ 1061 for(; nfsd && NFSW_CONTIG(owp, nfsd); nfsd = wp) { 1062 wp = nfsd->nd_hash.le_next; 1063 if (NFSW_SAMECRED(owp, nfsd)) 1064 nfsrvw_coalesce(owp, nfsd); 1065 } 1066 } else { 1067 LIST_INSERT_HEAD(wpp, nfsd, nd_hash); 1068 } 1069 } 1070 splx(s); 1071 } 1072 1073 /* 1074 * Now, do VOP_WRITE()s for any one(s) that need to be done now 1075 * and generate the associated reply mbuf list(s). 1076 */ 1077 loop1: 1078 cur_usec = (u_quad_t)time.tv_sec * 1000000 + (u_quad_t)time.tv_usec; 1079 s = splsoftclock(); 1080 for (nfsd = slp->ns_tq.lh_first; nfsd; nfsd = owp) { 1081 owp = nfsd->nd_tq.le_next; 1082 if (nfsd->nd_time > cur_usec) 1083 break; 1084 if (nfsd->nd_mreq) 1085 continue; 1086 LIST_REMOVE(nfsd, nd_tq); 1087 LIST_REMOVE(nfsd, nd_hash); 1088 splx(s); 1089 mrep = nfsd->nd_mrep; 1090 nfsd->nd_mrep = NULL; 1091 cred = &nfsd->nd_cr; 1092 v3 = (nfsd->nd_flag & ND_NFSV3); 1093 forat_ret = aftat_ret = 1; 1094 error = nfsrv_fhtovp(&nfsd->nd_fh, 1, &vp, cred, slp, 1095 nfsd->nd_nam, &rdonly, (nfsd->nd_flag & ND_KERBAUTH), 1096 FALSE); 1097 if (!error) { 1098 if (v3) 1099 forat_ret = VOP_GETATTR(vp, &forat, cred, procp); 1100 if (vp->v_type != VREG) { 1101 if (v3) 1102 error = EINVAL; 1103 else 1104 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 1105 } 1106 } else 1107 vp = NULL; 1108 if (!error) { 1109 nqsrv_getl(vp, ND_WRITE); 1110 error = nfsrv_access(vp, VWRITE, cred, rdonly, procp, 1); 1111 } 1112 1113 if (nfsd->nd_stable == NFSV3WRITE_UNSTABLE) 1114 ioflags = IO_NODELOCKED; 1115 else if (nfsd->nd_stable == NFSV3WRITE_DATASYNC) 1116 ioflags = (IO_SYNC | IO_NODELOCKED); 1117 else 1118 ioflags = (IO_METASYNC | IO_SYNC | IO_NODELOCKED); 1119 uiop->uio_rw = UIO_WRITE; 1120 uiop->uio_segflg = UIO_SYSSPACE; 1121 uiop->uio_procp = (struct proc *)0; 1122 uiop->uio_offset = nfsd->nd_off; 1123 uiop->uio_resid = nfsd->nd_eoff - nfsd->nd_off; 1124 if (uiop->uio_resid > 0) { 1125 mp = mrep; 1126 i = 0; 1127 while (mp) { 1128 if (mp->m_len > 0) 1129 i++; 1130 mp = mp->m_next; 1131 } 1132 uiop->uio_iovcnt = i; 1133 MALLOC(iov, struct iovec *, i * sizeof (struct iovec), 1134 M_TEMP, M_WAITOK); 1135 uiop->uio_iov = ivp = iov; 1136 mp = mrep; 1137 while (mp) { 1138 if (mp->m_len > 0) { 1139 ivp->iov_base = mtod(mp, caddr_t); 1140 ivp->iov_len = mp->m_len; 1141 ivp++; 1142 } 1143 mp = mp->m_next; 1144 } 1145 if (!error) { 1146 error = VOP_WRITE(vp, uiop, ioflags, cred); 1147 nfsstats.srvvop_writes++; 1148 } 1149 FREE((caddr_t)iov, M_TEMP); 1150 } 1151 m_freem(mrep); 1152 if (vp) { 1153 aftat_ret = VOP_GETATTR(vp, &va, cred, procp); 1154 vput(vp); 1155 } 1156 1157 /* 1158 * Loop around generating replies for all write rpcs that have 1159 * now been completed. 1160 */ 1161 swp = nfsd; 1162 do { 1163 if (error) { 1164 nfsm_writereply(NFSX_WCCDATA(v3), v3); 1165 if (v3) { 1166 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1167 } 1168 } else { 1169 nfsm_writereply(NFSX_PREOPATTR(v3) + 1170 NFSX_POSTOPORFATTR(v3) + 2 * NFSX_UNSIGNED + 1171 NFSX_WRITEVERF(v3), v3); 1172 if (v3) { 1173 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1174 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1175 *tl++ = txdr_unsigned(nfsd->nd_len); 1176 *tl++ = txdr_unsigned(swp->nd_stable); 1177 /* 1178 * Actually, there is no need to txdr these fields, 1179 * but it may make the values more human readable, 1180 * for debugging purposes. 1181 */ 1182 *tl++ = txdr_unsigned(boottime.tv_sec); 1183 *tl = txdr_unsigned(boottime.tv_usec); 1184 } else { 1185 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 1186 nfsm_srvfillattr(&va, fp); 1187 } 1188 } 1189 nfsd->nd_mreq = mreq; 1190 if (nfsd->nd_mrep) 1191 panic("nfsrv_write: nd_mrep not free"); 1192 1193 /* 1194 * Done. Put it at the head of the timer queue so that 1195 * the final phase can return the reply. 1196 */ 1197 s = splsoftclock(); 1198 if (nfsd != swp) { 1199 nfsd->nd_time = 0; 1200 LIST_INSERT_HEAD(&slp->ns_tq, nfsd, nd_tq); 1201 } 1202 nfsd = swp->nd_coalesce.lh_first; 1203 if (nfsd) { 1204 LIST_REMOVE(nfsd, nd_tq); 1205 } 1206 splx(s); 1207 } while (nfsd); 1208 s = splsoftclock(); 1209 swp->nd_time = 0; 1210 LIST_INSERT_HEAD(&slp->ns_tq, swp, nd_tq); 1211 splx(s); 1212 goto loop1; 1213 } 1214 splx(s); 1215 1216 /* 1217 * Search for a reply to return. 1218 */ 1219 s = splsoftclock(); 1220 for (nfsd = slp->ns_tq.lh_first; nfsd; nfsd = nfsd->nd_tq.le_next) 1221 if (nfsd->nd_mreq) { 1222 LIST_REMOVE(nfsd, nd_tq); 1223 *mrq = nfsd->nd_mreq; 1224 *ndp = nfsd; 1225 break; 1226 } 1227 splx(s); 1228 return (0); 1229 } 1230 1231 /* 1232 * Coalesce the write request nfsd into owp. To do this we must: 1233 * - remove nfsd from the queues 1234 * - merge nfsd->nd_mrep into owp->nd_mrep 1235 * - update the nd_eoff and nd_stable for owp 1236 * - put nfsd on owp's nd_coalesce list 1237 * NB: Must be called at splsoftclock(). 1238 */ 1239 void 1240 nfsrvw_coalesce(owp, nfsd) 1241 register struct nfsrv_descript *owp; 1242 register struct nfsrv_descript *nfsd; 1243 { 1244 register int overlap; 1245 register struct mbuf *mp; 1246 1247 LIST_REMOVE(nfsd, nd_hash); 1248 LIST_REMOVE(nfsd, nd_tq); 1249 if (owp->nd_eoff < nfsd->nd_eoff) { 1250 overlap = owp->nd_eoff - nfsd->nd_off; 1251 if (overlap < 0) 1252 panic("nfsrv_coalesce: bad off"); 1253 if (overlap > 0) 1254 m_adj(nfsd->nd_mrep, overlap); 1255 mp = owp->nd_mrep; 1256 while (mp->m_next) 1257 mp = mp->m_next; 1258 mp->m_next = nfsd->nd_mrep; 1259 owp->nd_eoff = nfsd->nd_eoff; 1260 } else 1261 m_freem(nfsd->nd_mrep); 1262 nfsd->nd_mrep = NULL; 1263 if (nfsd->nd_stable == NFSV3WRITE_FILESYNC) 1264 owp->nd_stable = NFSV3WRITE_FILESYNC; 1265 else if (nfsd->nd_stable == NFSV3WRITE_DATASYNC && 1266 owp->nd_stable == NFSV3WRITE_UNSTABLE) 1267 owp->nd_stable = NFSV3WRITE_DATASYNC; 1268 LIST_INSERT_HEAD(&owp->nd_coalesce, nfsd, nd_tq); 1269 /* 1270 * nfsd might hold coalesce elements! Move them to owp. 1271 * Otherwise, requests may be lost and clients will be stuck. 1272 */ 1273 if (nfsd->nd_coalesce.lh_first) 1274 { 1275 register struct nfsrv_descript *m; 1276 1277 while ((m = nfsd->nd_coalesce.lh_first)) 1278 { 1279 LIST_REMOVE(m, nd_tq); 1280 LIST_INSERT_HEAD(&owp->nd_coalesce, m, nd_tq); 1281 } 1282 } 1283 } 1284 1285 /* 1286 * nfs create service 1287 * now does a truncate to 0 length via. setattr if it already exists 1288 */ 1289 int 1290 nfsrv_create(nfsd, slp, procp, mrq) 1291 struct nfsrv_descript *nfsd; 1292 struct nfssvc_sock *slp; 1293 struct proc *procp; 1294 struct mbuf **mrq; 1295 { 1296 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1297 struct mbuf *nam = nfsd->nd_nam; 1298 caddr_t dpos = nfsd->nd_dpos; 1299 struct ucred *cred = &nfsd->nd_cr; 1300 register struct nfs_fattr *fp; 1301 struct vattr va, dirfor, diraft; 1302 register struct nfsv2_sattr *sp; 1303 register u_int32_t *tl; 1304 struct nameidata nd; 1305 register caddr_t cp; 1306 register int32_t t1; 1307 caddr_t bpos; 1308 int error = 0, cache, len, tsize, dirfor_ret = 1, diraft_ret = 1; 1309 int rdev = 0; 1310 int v3 = (nfsd->nd_flag & ND_NFSV3), how, exclusive_flag = 0; 1311 char *cp2; 1312 struct mbuf *mb, *mb2, *mreq; 1313 struct vnode *vp = NULL, *dirp = NULL; 1314 nfsfh_t nfh; 1315 fhandle_t *fhp; 1316 u_quad_t frev, tempsize; 1317 u_char cverf[NFSX_V3CREATEVERF]; 1318 1319 nd.ni_cnd.cn_nameiop = 0; 1320 fhp = &nfh.fh_generic; 1321 nfsm_srvmtofh(fhp); 1322 nfsm_srvnamesiz(len); 1323 nd.ni_cnd.cn_cred = cred; 1324 nd.ni_cnd.cn_nameiop = CREATE; 1325 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF | SAVESTART; 1326 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 1327 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1328 if (dirp) { 1329 if (v3) 1330 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 1331 procp); 1332 else { 1333 vrele(dirp); 1334 dirp = (struct vnode *)0; 1335 } 1336 } 1337 if (error) { 1338 nfsm_reply(NFSX_WCCDATA(v3)); 1339 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1340 if (dirp) 1341 vrele(dirp); 1342 return (0); 1343 } 1344 VATTR_NULL(&va); 1345 if (v3) { 1346 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1347 how = fxdr_unsigned(int, *tl); 1348 switch (how) { 1349 case NFSV3CREATE_GUARDED: 1350 if (nd.ni_vp) { 1351 error = EEXIST; 1352 break; 1353 } 1354 case NFSV3CREATE_UNCHECKED: 1355 nfsm_srvsattr(&va); 1356 break; 1357 case NFSV3CREATE_EXCLUSIVE: 1358 nfsm_dissect(cp, caddr_t, NFSX_V3CREATEVERF); 1359 memcpy(cverf, cp, NFSX_V3CREATEVERF); 1360 exclusive_flag = 1; 1361 if (nd.ni_vp == NULL) 1362 va.va_mode = 0; 1363 break; 1364 }; 1365 va.va_type = VREG; 1366 } else { 1367 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1368 va.va_type = IFTOVT(fxdr_unsigned(u_int32_t, sp->sa_mode)); 1369 if (va.va_type == VNON) 1370 va.va_type = VREG; 1371 va.va_mode = nfstov_mode(sp->sa_mode); 1372 switch (va.va_type) { 1373 case VREG: 1374 tsize = fxdr_unsigned(int32_t, sp->sa_size); 1375 if (tsize != -1) 1376 va.va_size = (u_quad_t)tsize; 1377 break; 1378 case VCHR: 1379 case VBLK: 1380 case VFIFO: 1381 rdev = fxdr_unsigned(int32_t, sp->sa_size); 1382 break; 1383 default: 1384 break; 1385 }; 1386 } 1387 1388 /* 1389 * Iff doesn't exist, create it 1390 * otherwise just truncate to 0 length 1391 * should I set the mode too ?? 1392 */ 1393 if (nd.ni_vp == NULL) { 1394 if (va.va_type == VREG || va.va_type == VSOCK) { 1395 vrele(nd.ni_startdir); 1396 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1397 error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1398 if (!error) { 1399 FREE(nd.ni_cnd.cn_pnbuf, M_NAMEI); 1400 if (exclusive_flag) { 1401 exclusive_flag = 0; 1402 VATTR_NULL(&va); 1403 memcpy((caddr_t)&va.va_atime, cverf, 1404 NFSX_V3CREATEVERF); 1405 error = VOP_SETATTR(nd.ni_vp, &va, cred, 1406 procp); 1407 } 1408 } 1409 } else if (va.va_type == VCHR || va.va_type == VBLK || 1410 va.va_type == VFIFO) { 1411 if (va.va_type == VCHR && rdev == 0xffffffff) 1412 va.va_type = VFIFO; 1413 if (va.va_type != VFIFO && 1414 (error = suser(cred, (u_short *)0))) { 1415 vrele(nd.ni_startdir); 1416 free(nd.ni_cnd.cn_pnbuf, M_NAMEI); 1417 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1418 vput(nd.ni_dvp); 1419 nfsm_reply(0); 1420 return (error); 1421 } else 1422 va.va_rdev = (dev_t)rdev; 1423 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1424 error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, 1425 &va); 1426 if (error) { 1427 vrele(nd.ni_startdir); 1428 nfsm_reply(0); 1429 } 1430 nd.ni_cnd.cn_nameiop = LOOKUP; 1431 nd.ni_cnd.cn_flags &= ~(LOCKPARENT | SAVESTART); 1432 nd.ni_cnd.cn_proc = procp; 1433 nd.ni_cnd.cn_cred = cred; 1434 if ((error = lookup(&nd)) != 0) { 1435 free(nd.ni_cnd.cn_pnbuf, M_NAMEI); 1436 nfsm_reply(0); 1437 } 1438 FREE(nd.ni_cnd.cn_pnbuf, M_NAMEI); 1439 if (nd.ni_cnd.cn_flags & ISSYMLINK) { 1440 vrele(nd.ni_dvp); 1441 vput(nd.ni_vp); 1442 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1443 error = EINVAL; 1444 nfsm_reply(0); 1445 } 1446 } else { 1447 vrele(nd.ni_startdir); 1448 free(nd.ni_cnd.cn_pnbuf, M_NAMEI); 1449 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1450 vput(nd.ni_dvp); 1451 error = ENXIO; 1452 } 1453 vp = nd.ni_vp; 1454 } else { 1455 vrele(nd.ni_startdir); 1456 free(nd.ni_cnd.cn_pnbuf, M_NAMEI); 1457 vp = nd.ni_vp; 1458 if (nd.ni_dvp == vp) 1459 vrele(nd.ni_dvp); 1460 else 1461 vput(nd.ni_dvp); 1462 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1463 if (va.va_size != -1) { 1464 error = nfsrv_access(vp, VWRITE, cred, 1465 (nd.ni_cnd.cn_flags & RDONLY), procp, 0); 1466 if (!error) { 1467 nqsrv_getl(vp, ND_WRITE); 1468 tempsize = va.va_size; 1469 VATTR_NULL(&va); 1470 va.va_size = tempsize; 1471 error = VOP_SETATTR(vp, &va, cred, 1472 procp); 1473 } 1474 if (error) 1475 vput(vp); 1476 } 1477 } 1478 if (!error) { 1479 memset((caddr_t)fhp, 0, sizeof(nfh)); 1480 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; 1481 error = VFS_VPTOFH(vp, &fhp->fh_fid); 1482 if (!error) 1483 error = VOP_GETATTR(vp, &va, cred, procp); 1484 vput(vp); 1485 } 1486 if (v3) { 1487 if (exclusive_flag && !error && 1488 memcmp(cverf, (caddr_t)&va.va_atime, NFSX_V3CREATEVERF)) 1489 error = EEXIST; 1490 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 1491 vrele(dirp); 1492 } 1493 nfsm_reply(NFSX_SRVFH(v3) + NFSX_FATTR(v3) + NFSX_WCCDATA(v3)); 1494 if (v3) { 1495 if (!error) { 1496 nfsm_srvpostop_fh(fhp); 1497 nfsm_srvpostop_attr(0, &va); 1498 } 1499 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1500 } else { 1501 nfsm_srvfhtom(fhp, v3); 1502 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 1503 nfsm_srvfillattr(&va, fp); 1504 } 1505 return (0); 1506 nfsmout: 1507 if (dirp) 1508 vrele(dirp); 1509 if (nd.ni_cnd.cn_nameiop) { 1510 vrele(nd.ni_startdir); 1511 free((caddr_t)nd.ni_cnd.cn_pnbuf, M_NAMEI); 1512 } 1513 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1514 if (nd.ni_dvp == nd.ni_vp) 1515 vrele(nd.ni_dvp); 1516 else 1517 vput(nd.ni_dvp); 1518 if (nd.ni_vp) 1519 vput(nd.ni_vp); 1520 return (error); 1521 } 1522 1523 /* 1524 * nfs v3 mknod service 1525 */ 1526 int 1527 nfsrv_mknod(nfsd, slp, procp, mrq) 1528 struct nfsrv_descript *nfsd; 1529 struct nfssvc_sock *slp; 1530 struct proc *procp; 1531 struct mbuf **mrq; 1532 { 1533 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1534 struct mbuf *nam = nfsd->nd_nam; 1535 caddr_t dpos = nfsd->nd_dpos; 1536 struct ucred *cred = &nfsd->nd_cr; 1537 struct vattr va, dirfor, diraft; 1538 register u_int32_t *tl; 1539 struct nameidata nd; 1540 register int32_t t1; 1541 caddr_t bpos; 1542 int error = 0, cache, len, dirfor_ret = 1, diraft_ret = 1; 1543 u_int32_t major, minor; 1544 enum vtype vtyp; 1545 char *cp2; 1546 struct mbuf *mb, *mb2, *mreq; 1547 struct vnode *vp, *dirp = (struct vnode *)0; 1548 nfsfh_t nfh; 1549 fhandle_t *fhp; 1550 u_quad_t frev; 1551 1552 nd.ni_cnd.cn_nameiop = 0; 1553 fhp = &nfh.fh_generic; 1554 nfsm_srvmtofh(fhp); 1555 nfsm_srvnamesiz(len); 1556 nd.ni_cnd.cn_cred = cred; 1557 nd.ni_cnd.cn_nameiop = CREATE; 1558 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF | SAVESTART; 1559 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 1560 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1561 if (dirp) 1562 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, procp); 1563 if (error) { 1564 nfsm_reply(NFSX_WCCDATA(1)); 1565 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1566 if (dirp) 1567 vrele(dirp); 1568 return (0); 1569 } 1570 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1571 vtyp = nfsv3tov_type(*tl); 1572 if (vtyp != VCHR && vtyp != VBLK && vtyp != VSOCK && vtyp != VFIFO) { 1573 vrele(nd.ni_startdir); 1574 free((caddr_t)nd.ni_cnd.cn_pnbuf, M_NAMEI); 1575 error = NFSERR_BADTYPE; 1576 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1577 vput(nd.ni_dvp); 1578 goto out; 1579 } 1580 VATTR_NULL(&va); 1581 nfsm_srvsattr(&va); 1582 if (vtyp == VCHR || vtyp == VBLK) { 1583 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1584 major = fxdr_unsigned(u_int32_t, *tl++); 1585 minor = fxdr_unsigned(u_int32_t, *tl); 1586 va.va_rdev = makedev(major, minor); 1587 } 1588 1589 /* 1590 * Iff doesn't exist, create it. 1591 */ 1592 if (nd.ni_vp) { 1593 vrele(nd.ni_startdir); 1594 free((caddr_t)nd.ni_cnd.cn_pnbuf, M_NAMEI); 1595 error = EEXIST; 1596 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1597 vput(nd.ni_dvp); 1598 goto out; 1599 } 1600 va.va_type = vtyp; 1601 if (vtyp == VSOCK) { 1602 vrele(nd.ni_startdir); 1603 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1604 error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1605 if (!error) 1606 FREE(nd.ni_cnd.cn_pnbuf, M_NAMEI); 1607 } else { 1608 if (va.va_type != VFIFO && 1609 (error = suser(cred, (u_short *)0))) { 1610 vrele(nd.ni_startdir); 1611 free((caddr_t)nd.ni_cnd.cn_pnbuf, M_NAMEI); 1612 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1613 vput(nd.ni_dvp); 1614 goto out; 1615 } 1616 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1617 error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1618 if (error) { 1619 vrele(nd.ni_startdir); 1620 goto out; 1621 } 1622 nd.ni_cnd.cn_nameiop = LOOKUP; 1623 nd.ni_cnd.cn_flags &= ~(LOCKPARENT | SAVESTART); 1624 nd.ni_cnd.cn_proc = procp; 1625 nd.ni_cnd.cn_cred = procp->p_ucred; 1626 error = lookup(&nd); 1627 FREE(nd.ni_cnd.cn_pnbuf, M_NAMEI); 1628 if (error) 1629 goto out; 1630 if (nd.ni_cnd.cn_flags & ISSYMLINK) { 1631 vrele(nd.ni_dvp); 1632 vput(nd.ni_vp); 1633 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1634 error = EINVAL; 1635 } 1636 } 1637 out: 1638 vp = nd.ni_vp; 1639 if (!error) { 1640 memset((caddr_t)fhp, 0, sizeof(nfh)); 1641 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; 1642 error = VFS_VPTOFH(vp, &fhp->fh_fid); 1643 if (!error) 1644 error = VOP_GETATTR(vp, &va, cred, procp); 1645 vput(vp); 1646 } 1647 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 1648 vrele(dirp); 1649 nfsm_reply(NFSX_SRVFH(1) + NFSX_POSTOPATTR(1) + NFSX_WCCDATA(1)); 1650 if (!error) { 1651 nfsm_srvpostop_fh(fhp); 1652 nfsm_srvpostop_attr(0, &va); 1653 } 1654 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1655 return (0); 1656 nfsmout: 1657 if (dirp) 1658 vrele(dirp); 1659 if (nd.ni_cnd.cn_nameiop) { 1660 vrele(nd.ni_startdir); 1661 free((caddr_t)nd.ni_cnd.cn_pnbuf, M_NAMEI); 1662 } 1663 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1664 if (nd.ni_dvp == nd.ni_vp) 1665 vrele(nd.ni_dvp); 1666 else 1667 vput(nd.ni_dvp); 1668 if (nd.ni_vp) 1669 vput(nd.ni_vp); 1670 return (error); 1671 } 1672 1673 /* 1674 * nfs remove service 1675 */ 1676 int 1677 nfsrv_remove(nfsd, slp, procp, mrq) 1678 struct nfsrv_descript *nfsd; 1679 struct nfssvc_sock *slp; 1680 struct proc *procp; 1681 struct mbuf **mrq; 1682 { 1683 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1684 struct mbuf *nam = nfsd->nd_nam; 1685 caddr_t dpos = nfsd->nd_dpos; 1686 struct ucred *cred = &nfsd->nd_cr; 1687 struct nameidata nd; 1688 register u_int32_t *tl; 1689 register int32_t t1; 1690 caddr_t bpos; 1691 int error = 0, cache, len, dirfor_ret = 1, diraft_ret = 1; 1692 int v3 = (nfsd->nd_flag & ND_NFSV3); 1693 char *cp2; 1694 struct mbuf *mb, *mreq; 1695 struct vnode *vp, *dirp; 1696 struct vattr dirfor, diraft; 1697 nfsfh_t nfh; 1698 fhandle_t *fhp; 1699 u_quad_t frev; 1700 1701 #ifndef nolint 1702 vp = (struct vnode *)0; 1703 #endif 1704 fhp = &nfh.fh_generic; 1705 nfsm_srvmtofh(fhp); 1706 nfsm_srvnamesiz(len); 1707 nd.ni_cnd.cn_cred = cred; 1708 nd.ni_cnd.cn_nameiop = DELETE; 1709 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 1710 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 1711 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1712 if (dirp) { 1713 if (v3) 1714 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 1715 procp); 1716 else 1717 vrele(dirp); 1718 } 1719 if (!error) { 1720 vp = nd.ni_vp; 1721 if (vp->v_type == VDIR && 1722 (error = suser(cred, (u_short *)0)) != 0) 1723 goto out; 1724 /* 1725 * The root of a mounted filesystem cannot be deleted. 1726 */ 1727 if (vp->v_flag & VROOT) { 1728 error = EBUSY; 1729 goto out; 1730 } 1731 out: 1732 if (!error) { 1733 #if defined(UVM) 1734 (void)uvm_vnp_uncache(vp); 1735 #else 1736 (void)vnode_pager_uncache(vp); 1737 #endif 1738 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1739 nqsrv_getl(vp, ND_WRITE); 1740 error = VOP_REMOVE(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); 1741 } else { 1742 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1743 if (nd.ni_dvp == vp) 1744 vrele(nd.ni_dvp); 1745 else 1746 vput(nd.ni_dvp); 1747 vput(vp); 1748 } 1749 } 1750 if (dirp && v3) { 1751 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 1752 vrele(dirp); 1753 } 1754 nfsm_reply(NFSX_WCCDATA(v3)); 1755 if (v3) { 1756 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1757 return (0); 1758 } 1759 nfsm_srvdone; 1760 } 1761 1762 /* 1763 * nfs rename service 1764 */ 1765 int 1766 nfsrv_rename(nfsd, slp, procp, mrq) 1767 struct nfsrv_descript *nfsd; 1768 struct nfssvc_sock *slp; 1769 struct proc *procp; 1770 struct mbuf **mrq; 1771 { 1772 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1773 struct mbuf *nam = nfsd->nd_nam; 1774 caddr_t dpos = nfsd->nd_dpos; 1775 struct ucred *cred = &nfsd->nd_cr; 1776 register u_int32_t *tl; 1777 register int32_t t1; 1778 caddr_t bpos; 1779 int error = 0, cache, len, len2, fdirfor_ret = 1, fdiraft_ret = 1; 1780 int tdirfor_ret = 1, tdiraft_ret = 1; 1781 int v3 = (nfsd->nd_flag & ND_NFSV3); 1782 char *cp2; 1783 struct mbuf *mb, *mreq; 1784 struct nameidata fromnd, tond; 1785 struct vnode *fvp, *tvp, *tdvp, *fdirp = (struct vnode *)0; 1786 struct vnode *tdirp = (struct vnode *)0; 1787 struct vattr fdirfor, fdiraft, tdirfor, tdiraft; 1788 nfsfh_t fnfh, tnfh; 1789 fhandle_t *ffhp, *tfhp; 1790 u_quad_t frev; 1791 uid_t saved_uid; 1792 1793 #ifndef nolint 1794 fvp = (struct vnode *)0; 1795 #endif 1796 ffhp = &fnfh.fh_generic; 1797 tfhp = &tnfh.fh_generic; 1798 fromnd.ni_cnd.cn_nameiop = 0; 1799 tond.ni_cnd.cn_nameiop = 0; 1800 nfsm_srvmtofh(ffhp); 1801 nfsm_srvnamesiz(len); 1802 /* 1803 * Remember our original uid so that we can reset cr_uid before 1804 * the second nfs_namei() call, in case it is remapped. 1805 */ 1806 saved_uid = cred->cr_uid; 1807 fromnd.ni_cnd.cn_cred = cred; 1808 fromnd.ni_cnd.cn_nameiop = DELETE; 1809 fromnd.ni_cnd.cn_flags = WANTPARENT | SAVESTART; 1810 error = nfs_namei(&fromnd, ffhp, len, slp, nam, &md, 1811 &dpos, &fdirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1812 if (fdirp) { 1813 if (v3) 1814 fdirfor_ret = VOP_GETATTR(fdirp, &fdirfor, cred, 1815 procp); 1816 else { 1817 vrele(fdirp); 1818 fdirp = (struct vnode *)0; 1819 } 1820 } 1821 if (error) { 1822 nfsm_reply(2 * NFSX_WCCDATA(v3)); 1823 nfsm_srvwcc_data(fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft); 1824 nfsm_srvwcc_data(tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft); 1825 if (fdirp) 1826 vrele(fdirp); 1827 return (0); 1828 } 1829 fvp = fromnd.ni_vp; 1830 nfsm_srvmtofh(tfhp); 1831 nfsm_strsiz(len2, NFS_MAXNAMLEN); 1832 cred->cr_uid = saved_uid; 1833 tond.ni_cnd.cn_cred = cred; 1834 tond.ni_cnd.cn_nameiop = RENAME; 1835 tond.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF | NOCACHE | SAVESTART; 1836 error = nfs_namei(&tond, tfhp, len2, slp, nam, &md, 1837 &dpos, &tdirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1838 if (tdirp) { 1839 if (v3) 1840 tdirfor_ret = VOP_GETATTR(tdirp, &tdirfor, cred, 1841 procp); 1842 else { 1843 vrele(tdirp); 1844 tdirp = (struct vnode *)0; 1845 } 1846 } 1847 if (error) { 1848 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 1849 vrele(fromnd.ni_dvp); 1850 vrele(fvp); 1851 goto out1; 1852 } 1853 tdvp = tond.ni_dvp; 1854 tvp = tond.ni_vp; 1855 if (tvp != NULL) { 1856 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 1857 if (v3) 1858 error = EEXIST; 1859 else 1860 error = EISDIR; 1861 goto out; 1862 } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 1863 if (v3) 1864 error = EEXIST; 1865 else 1866 error = ENOTDIR; 1867 goto out; 1868 } 1869 if (tvp->v_type == VDIR && tvp->v_mountedhere) { 1870 if (v3) 1871 error = EXDEV; 1872 else 1873 error = ENOTEMPTY; 1874 goto out; 1875 } 1876 } 1877 if (fvp->v_type == VDIR && fvp->v_mountedhere) { 1878 if (v3) 1879 error = EXDEV; 1880 else 1881 error = ENOTEMPTY; 1882 goto out; 1883 } 1884 if (fvp->v_mount != tdvp->v_mount) { 1885 if (v3) 1886 error = EXDEV; 1887 else 1888 error = ENOTEMPTY; 1889 goto out; 1890 } 1891 if (fvp == tdvp) { 1892 if (v3) 1893 error = EINVAL; 1894 else 1895 error = ENOTEMPTY; 1896 } 1897 /* 1898 * If source is the same as the destination (that is the 1899 * same vnode with the same name in the same directory), 1900 * then there is nothing to do. 1901 */ 1902 if (fvp == tvp && fromnd.ni_dvp == tdvp && 1903 fromnd.ni_cnd.cn_namelen == tond.ni_cnd.cn_namelen && 1904 !memcmp(fromnd.ni_cnd.cn_nameptr, tond.ni_cnd.cn_nameptr, 1905 fromnd.ni_cnd.cn_namelen)) 1906 error = -1; 1907 out: 1908 if (!error) { 1909 nqsrv_getl(fromnd.ni_dvp, ND_WRITE); 1910 nqsrv_getl(tdvp, ND_WRITE); 1911 if (tvp) { 1912 #if defined(UVM) 1913 (void)uvm_vnp_uncache(tvp); 1914 #else 1915 (void)vnode_pager_uncache(tvp); 1916 #endif 1917 nqsrv_getl(tvp, ND_WRITE); 1918 } 1919 error = VOP_RENAME(fromnd.ni_dvp, fromnd.ni_vp, &fromnd.ni_cnd, 1920 tond.ni_dvp, tond.ni_vp, &tond.ni_cnd); 1921 } else { 1922 VOP_ABORTOP(tond.ni_dvp, &tond.ni_cnd); 1923 if (tdvp == tvp) 1924 vrele(tdvp); 1925 else 1926 vput(tdvp); 1927 if (tvp) 1928 vput(tvp); 1929 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 1930 vrele(fromnd.ni_dvp); 1931 vrele(fvp); 1932 if (error == -1) 1933 error = 0; 1934 } 1935 vrele(tond.ni_startdir); 1936 FREE(tond.ni_cnd.cn_pnbuf, M_NAMEI); 1937 out1: 1938 if (fdirp) { 1939 fdiraft_ret = VOP_GETATTR(fdirp, &fdiraft, cred, procp); 1940 vrele(fdirp); 1941 } 1942 if (tdirp) { 1943 tdiraft_ret = VOP_GETATTR(tdirp, &tdiraft, cred, procp); 1944 vrele(tdirp); 1945 } 1946 vrele(fromnd.ni_startdir); 1947 FREE(fromnd.ni_cnd.cn_pnbuf, M_NAMEI); 1948 nfsm_reply(2 * NFSX_WCCDATA(v3)); 1949 if (v3) { 1950 nfsm_srvwcc_data(fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft); 1951 nfsm_srvwcc_data(tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft); 1952 } 1953 return (0); 1954 1955 nfsmout: 1956 if (fdirp) 1957 vrele(fdirp); 1958 if (tdirp) 1959 vrele(tdirp); 1960 if (tond.ni_cnd.cn_nameiop) { 1961 vrele(tond.ni_startdir); 1962 FREE(tond.ni_cnd.cn_pnbuf, M_NAMEI); 1963 } 1964 if (fromnd.ni_cnd.cn_nameiop) { 1965 vrele(fromnd.ni_startdir); 1966 FREE(fromnd.ni_cnd.cn_pnbuf, M_NAMEI); 1967 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 1968 vrele(fromnd.ni_dvp); 1969 vrele(fvp); 1970 } 1971 return (error); 1972 } 1973 1974 /* 1975 * nfs link service 1976 */ 1977 int 1978 nfsrv_link(nfsd, slp, procp, mrq) 1979 struct nfsrv_descript *nfsd; 1980 struct nfssvc_sock *slp; 1981 struct proc *procp; 1982 struct mbuf **mrq; 1983 { 1984 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1985 struct mbuf *nam = nfsd->nd_nam; 1986 caddr_t dpos = nfsd->nd_dpos; 1987 struct ucred *cred = &nfsd->nd_cr; 1988 struct nameidata nd; 1989 register u_int32_t *tl; 1990 register int32_t t1; 1991 caddr_t bpos; 1992 int error = 0, rdonly, cache, len, dirfor_ret = 1, diraft_ret = 1; 1993 int getret = 1, v3 = (nfsd->nd_flag & ND_NFSV3); 1994 char *cp2; 1995 struct mbuf *mb, *mreq; 1996 struct vnode *vp, *xp, *dirp = (struct vnode *)0; 1997 struct vattr dirfor, diraft, at; 1998 nfsfh_t nfh, dnfh; 1999 fhandle_t *fhp, *dfhp; 2000 u_quad_t frev; 2001 2002 fhp = &nfh.fh_generic; 2003 dfhp = &dnfh.fh_generic; 2004 nfsm_srvmtofh(fhp); 2005 nfsm_srvmtofh(dfhp); 2006 nfsm_srvnamesiz(len); 2007 error = nfsrv_fhtovp(fhp, FALSE, &vp, cred, slp, nam, 2008 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2009 if (error) { 2010 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2011 nfsm_srvpostop_attr(getret, &at); 2012 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2013 return (0); 2014 } 2015 if (vp->v_type == VDIR && (error = suser(cred, (u_short *)0)) != 0) 2016 goto out1; 2017 nd.ni_cnd.cn_cred = cred; 2018 nd.ni_cnd.cn_nameiop = CREATE; 2019 nd.ni_cnd.cn_flags = LOCKPARENT; 2020 error = nfs_namei(&nd, dfhp, len, slp, nam, &md, &dpos, 2021 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2022 if (dirp) { 2023 if (v3) 2024 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 2025 procp); 2026 else { 2027 vrele(dirp); 2028 dirp = (struct vnode *)0; 2029 } 2030 } 2031 if (error) 2032 goto out1; 2033 xp = nd.ni_vp; 2034 if (xp != NULL) { 2035 error = EEXIST; 2036 goto out; 2037 } 2038 xp = nd.ni_dvp; 2039 if (vp->v_mount != xp->v_mount) 2040 error = EXDEV; 2041 out: 2042 if (!error) { 2043 nqsrv_getl(vp, ND_WRITE); 2044 nqsrv_getl(xp, ND_WRITE); 2045 error = VOP_LINK(nd.ni_dvp, vp, &nd.ni_cnd); 2046 } else { 2047 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2048 if (nd.ni_dvp == nd.ni_vp) 2049 vrele(nd.ni_dvp); 2050 else 2051 vput(nd.ni_dvp); 2052 if (nd.ni_vp) 2053 vrele(nd.ni_vp); 2054 } 2055 out1: 2056 if (v3) 2057 getret = VOP_GETATTR(vp, &at, cred, procp); 2058 if (dirp) { 2059 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 2060 vrele(dirp); 2061 } 2062 vrele(vp); 2063 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2064 if (v3) { 2065 nfsm_srvpostop_attr(getret, &at); 2066 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2067 return (0); 2068 } 2069 nfsm_srvdone; 2070 } 2071 2072 /* 2073 * nfs symbolic link service 2074 */ 2075 int 2076 nfsrv_symlink(nfsd, slp, procp, mrq) 2077 struct nfsrv_descript *nfsd; 2078 struct nfssvc_sock *slp; 2079 struct proc *procp; 2080 struct mbuf **mrq; 2081 { 2082 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2083 struct mbuf *nam = nfsd->nd_nam; 2084 caddr_t dpos = nfsd->nd_dpos; 2085 struct ucred *cred = &nfsd->nd_cr; 2086 struct vattr va, dirfor, diraft; 2087 struct nameidata nd; 2088 register u_int32_t *tl; 2089 register int32_t t1; 2090 struct nfsv2_sattr *sp; 2091 char *bpos, *pathcp = NULL, *cp2; 2092 struct uio io; 2093 struct iovec iv; 2094 int error = 0, cache, len, len2, dirfor_ret = 1, diraft_ret = 1; 2095 int v3 = (nfsd->nd_flag & ND_NFSV3); 2096 struct mbuf *mb, *mreq, *mb2; 2097 struct vnode *dirp = (struct vnode *)0; 2098 nfsfh_t nfh; 2099 fhandle_t *fhp; 2100 u_quad_t frev; 2101 2102 nd.ni_cnd.cn_nameiop = 0; 2103 fhp = &nfh.fh_generic; 2104 nfsm_srvmtofh(fhp); 2105 nfsm_srvnamesiz(len); 2106 nd.ni_cnd.cn_cred = cred; 2107 nd.ni_cnd.cn_nameiop = CREATE; 2108 nd.ni_cnd.cn_flags = LOCKPARENT | SAVESTART; 2109 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 2110 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2111 if (dirp) { 2112 if (v3) 2113 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 2114 procp); 2115 else { 2116 vrele(dirp); 2117 dirp = (struct vnode *)0; 2118 } 2119 } 2120 if (error) 2121 goto out; 2122 VATTR_NULL(&va); 2123 if (v3) 2124 nfsm_srvsattr(&va); 2125 nfsm_strsiz(len2, NFS_MAXPATHLEN); 2126 MALLOC(pathcp, caddr_t, len2 + 1, M_TEMP, M_WAITOK); 2127 iv.iov_base = pathcp; 2128 iv.iov_len = len2; 2129 io.uio_resid = len2; 2130 io.uio_offset = 0; 2131 io.uio_iov = &iv; 2132 io.uio_iovcnt = 1; 2133 io.uio_segflg = UIO_SYSSPACE; 2134 io.uio_rw = UIO_READ; 2135 io.uio_procp = (struct proc *)0; 2136 nfsm_mtouio(&io, len2); 2137 if (!v3) { 2138 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2139 va.va_mode = fxdr_unsigned(u_int16_t, sp->sa_mode); 2140 } 2141 *(pathcp + len2) = '\0'; 2142 if (nd.ni_vp) { 2143 vrele(nd.ni_startdir); 2144 free(nd.ni_cnd.cn_pnbuf, M_NAMEI); 2145 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2146 if (nd.ni_dvp == nd.ni_vp) 2147 vrele(nd.ni_dvp); 2148 else 2149 vput(nd.ni_dvp); 2150 vrele(nd.ni_vp); 2151 error = EEXIST; 2152 goto out; 2153 } 2154 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2155 error = VOP_SYMLINK(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va, pathcp); 2156 if (error) 2157 vrele(nd.ni_startdir); 2158 else { 2159 if (v3) { 2160 nd.ni_cnd.cn_nameiop = LOOKUP; 2161 nd.ni_cnd.cn_flags &= ~(LOCKPARENT | SAVESTART | FOLLOW); 2162 nd.ni_cnd.cn_flags |= (NOFOLLOW | LOCKLEAF); 2163 nd.ni_cnd.cn_proc = procp; 2164 nd.ni_cnd.cn_cred = cred; 2165 error = lookup(&nd); 2166 if (!error) { 2167 memset((caddr_t)fhp, 0, sizeof(nfh)); 2168 fhp->fh_fsid = nd.ni_vp->v_mount->mnt_stat.f_fsid; 2169 error = VFS_VPTOFH(nd.ni_vp, &fhp->fh_fid); 2170 if (!error) 2171 error = VOP_GETATTR(nd.ni_vp, &va, cred, 2172 procp); 2173 vput(nd.ni_vp); 2174 } 2175 } else 2176 vrele(nd.ni_startdir); 2177 FREE(nd.ni_cnd.cn_pnbuf, M_NAMEI); 2178 } 2179 out: 2180 if (pathcp) 2181 FREE(pathcp, M_TEMP); 2182 if (dirp) { 2183 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 2184 vrele(dirp); 2185 } 2186 nfsm_reply(NFSX_SRVFH(v3) + NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2187 if (v3) { 2188 if (!error) { 2189 nfsm_srvpostop_fh(fhp); 2190 nfsm_srvpostop_attr(0, &va); 2191 } 2192 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2193 } 2194 return (0); 2195 nfsmout: 2196 if (nd.ni_cnd.cn_nameiop) { 2197 vrele(nd.ni_startdir); 2198 free(nd.ni_cnd.cn_pnbuf, M_NAMEI); 2199 } 2200 if (dirp) 2201 vrele(dirp); 2202 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2203 if (nd.ni_dvp == nd.ni_vp) 2204 vrele(nd.ni_dvp); 2205 else 2206 vput(nd.ni_dvp); 2207 if (nd.ni_vp) 2208 vrele(nd.ni_vp); 2209 if (pathcp) 2210 FREE(pathcp, M_TEMP); 2211 return (error); 2212 } 2213 2214 /* 2215 * nfs mkdir service 2216 */ 2217 int 2218 nfsrv_mkdir(nfsd, slp, procp, mrq) 2219 struct nfsrv_descript *nfsd; 2220 struct nfssvc_sock *slp; 2221 struct proc *procp; 2222 struct mbuf **mrq; 2223 { 2224 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2225 struct mbuf *nam = nfsd->nd_nam; 2226 caddr_t dpos = nfsd->nd_dpos; 2227 struct ucred *cred = &nfsd->nd_cr; 2228 struct vattr va, dirfor, diraft; 2229 register struct nfs_fattr *fp; 2230 struct nameidata nd; 2231 register caddr_t cp; 2232 register u_int32_t *tl; 2233 register int32_t t1; 2234 caddr_t bpos; 2235 int error = 0, cache, len, dirfor_ret = 1, diraft_ret = 1; 2236 int v3 = (nfsd->nd_flag & ND_NFSV3); 2237 char *cp2; 2238 struct mbuf *mb, *mb2, *mreq; 2239 struct vnode *vp, *dirp = (struct vnode *)0; 2240 nfsfh_t nfh; 2241 fhandle_t *fhp; 2242 u_quad_t frev; 2243 2244 fhp = &nfh.fh_generic; 2245 nfsm_srvmtofh(fhp); 2246 nfsm_srvnamesiz(len); 2247 nd.ni_cnd.cn_cred = cred; 2248 nd.ni_cnd.cn_nameiop = CREATE; 2249 nd.ni_cnd.cn_flags = LOCKPARENT; 2250 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 2251 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2252 if (dirp) { 2253 if (v3) 2254 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 2255 procp); 2256 else { 2257 vrele(dirp); 2258 dirp = (struct vnode *)0; 2259 } 2260 } 2261 if (error) { 2262 nfsm_reply(NFSX_WCCDATA(v3)); 2263 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2264 if (dirp) 2265 vrele(dirp); 2266 return (0); 2267 } 2268 VATTR_NULL(&va); 2269 if (v3) { 2270 nfsm_srvsattr(&va); 2271 } else { 2272 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2273 va.va_mode = nfstov_mode(*tl++); 2274 } 2275 va.va_type = VDIR; 2276 vp = nd.ni_vp; 2277 if (vp != NULL) { 2278 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2279 if (nd.ni_dvp == vp) 2280 vrele(nd.ni_dvp); 2281 else 2282 vput(nd.ni_dvp); 2283 vrele(vp); 2284 error = EEXIST; 2285 goto out; 2286 } 2287 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2288 error = VOP_MKDIR(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 2289 if (!error) { 2290 vp = nd.ni_vp; 2291 memset((caddr_t)fhp, 0, sizeof(nfh)); 2292 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; 2293 error = VFS_VPTOFH(vp, &fhp->fh_fid); 2294 if (!error) 2295 error = VOP_GETATTR(vp, &va, cred, procp); 2296 vput(vp); 2297 } 2298 out: 2299 if (dirp) { 2300 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 2301 vrele(dirp); 2302 } 2303 nfsm_reply(NFSX_SRVFH(v3) + NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2304 if (v3) { 2305 if (!error) { 2306 nfsm_srvpostop_fh(fhp); 2307 nfsm_srvpostop_attr(0, &va); 2308 } 2309 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2310 } else { 2311 nfsm_srvfhtom(fhp, v3); 2312 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 2313 nfsm_srvfillattr(&va, fp); 2314 } 2315 return (0); 2316 nfsmout: 2317 if (dirp) 2318 vrele(dirp); 2319 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2320 if (nd.ni_dvp == nd.ni_vp) 2321 vrele(nd.ni_dvp); 2322 else 2323 vput(nd.ni_dvp); 2324 if (nd.ni_vp) 2325 vrele(nd.ni_vp); 2326 return (error); 2327 } 2328 2329 /* 2330 * nfs rmdir service 2331 */ 2332 int 2333 nfsrv_rmdir(nfsd, slp, procp, mrq) 2334 struct nfsrv_descript *nfsd; 2335 struct nfssvc_sock *slp; 2336 struct proc *procp; 2337 struct mbuf **mrq; 2338 { 2339 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2340 struct mbuf *nam = nfsd->nd_nam; 2341 caddr_t dpos = nfsd->nd_dpos; 2342 struct ucred *cred = &nfsd->nd_cr; 2343 register u_int32_t *tl; 2344 register int32_t t1; 2345 caddr_t bpos; 2346 int error = 0, cache, len, dirfor_ret = 1, diraft_ret = 1; 2347 int v3 = (nfsd->nd_flag & ND_NFSV3); 2348 char *cp2; 2349 struct mbuf *mb, *mreq; 2350 struct vnode *vp, *dirp = (struct vnode *)0; 2351 struct vattr dirfor, diraft; 2352 nfsfh_t nfh; 2353 fhandle_t *fhp; 2354 struct nameidata nd; 2355 u_quad_t frev; 2356 2357 fhp = &nfh.fh_generic; 2358 nfsm_srvmtofh(fhp); 2359 nfsm_srvnamesiz(len); 2360 nd.ni_cnd.cn_cred = cred; 2361 nd.ni_cnd.cn_nameiop = DELETE; 2362 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 2363 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 2364 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2365 if (dirp) { 2366 if (v3) 2367 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 2368 procp); 2369 else { 2370 vrele(dirp); 2371 dirp = (struct vnode *)0; 2372 } 2373 } 2374 if (error) { 2375 nfsm_reply(NFSX_WCCDATA(v3)); 2376 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2377 if (dirp) 2378 vrele(dirp); 2379 return (0); 2380 } 2381 vp = nd.ni_vp; 2382 if (vp->v_type != VDIR) { 2383 error = ENOTDIR; 2384 goto out; 2385 } 2386 /* 2387 * No rmdir "." please. 2388 */ 2389 if (nd.ni_dvp == vp) { 2390 error = EINVAL; 2391 goto out; 2392 } 2393 /* 2394 * The root of a mounted filesystem cannot be deleted. 2395 */ 2396 if (vp->v_flag & VROOT) 2397 error = EBUSY; 2398 out: 2399 if (!error) { 2400 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2401 nqsrv_getl(vp, ND_WRITE); 2402 error = VOP_RMDIR(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); 2403 } else { 2404 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2405 if (nd.ni_dvp == nd.ni_vp) 2406 vrele(nd.ni_dvp); 2407 else 2408 vput(nd.ni_dvp); 2409 vput(vp); 2410 } 2411 if (dirp) { 2412 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 2413 vrele(dirp); 2414 } 2415 nfsm_reply(NFSX_WCCDATA(v3)); 2416 if (v3) { 2417 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2418 return (0); 2419 } 2420 nfsm_srvdone; 2421 } 2422 2423 /* 2424 * nfs readdir service 2425 * - mallocs what it thinks is enough to read 2426 * count rounded up to a multiple of NFS_DIRBLKSIZ <= NFS_MAXREADDIR 2427 * - calls VOP_READDIR() 2428 * - loops around building the reply 2429 * if the output generated exceeds count break out of loop 2430 * The nfsm_clget macro is used here so that the reply will be packed 2431 * tightly in mbuf clusters. 2432 * - it only knows that it has encountered eof when the VOP_READDIR() 2433 * reads nothing 2434 * - as such one readdir rpc will return eof false although you are there 2435 * and then the next will return eof 2436 * - it trims out records with d_fileno == 0 2437 * this doesn't matter for Unix clients, but they might confuse clients 2438 * for other os'. 2439 * - it trims out records with d_type == DT_WHT 2440 * these cannot be seen through NFS (unless we extend the protocol) 2441 * NB: It is tempting to set eof to true if the VOP_READDIR() reads less 2442 * than requested, but this may not apply to all filesystems. For 2443 * example, client NFS does not { although it is never remote mounted 2444 * anyhow } 2445 * The alternate call nfsrv_readdirplus() does lookups as well. 2446 * PS: The NFS protocol spec. does not clarify what the "count" byte 2447 * argument is a count of.. just name strings and file id's or the 2448 * entire reply rpc or ... 2449 * I tried just file name and id sizes and it confused the Sun client, 2450 * so I am using the full rpc size now. The "paranoia.." comment refers 2451 * to including the status longwords that are not a part of the dir. 2452 * "entry" structures, but are in the rpc. 2453 */ 2454 struct flrep { 2455 nfsuint64 fl_off; 2456 u_int32_t fl_postopok; 2457 u_int32_t fl_fattr[NFSX_V3FATTR / sizeof (u_int32_t)]; 2458 u_int32_t fl_fhok; 2459 u_int32_t fl_fhsize; 2460 u_int32_t fl_nfh[NFSX_V3FH / sizeof (u_int32_t)]; 2461 }; 2462 2463 int 2464 nfsrv_readdir(nfsd, slp, procp, mrq) 2465 struct nfsrv_descript *nfsd; 2466 struct nfssvc_sock *slp; 2467 struct proc *procp; 2468 struct mbuf **mrq; 2469 { 2470 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2471 struct mbuf *nam = nfsd->nd_nam; 2472 caddr_t dpos = nfsd->nd_dpos; 2473 struct ucred *cred = &nfsd->nd_cr; 2474 register char *bp, *be; 2475 register struct mbuf *mp; 2476 register struct dirent *dp; 2477 register caddr_t cp; 2478 register u_int32_t *tl; 2479 register int32_t t1; 2480 caddr_t bpos; 2481 struct mbuf *mb, *mb2, *mreq, *mp2; 2482 char *cpos, *cend, *cp2, *rbuf; 2483 struct vnode *vp; 2484 struct vattr at; 2485 nfsfh_t nfh; 2486 fhandle_t *fhp; 2487 struct uio io; 2488 struct iovec iv; 2489 int len, nlen, rem, xfer, tsiz, i, error = 0, getret = 1; 2490 int siz, cnt, fullsiz, eofflag, rdonly, cache, ncookies; 2491 int v3 = (nfsd->nd_flag & ND_NFSV3); 2492 u_quad_t frev, off, toff, verf; 2493 off_t *cookies = NULL, *cookiep; 2494 nfsuint64 jar; 2495 2496 fhp = &nfh.fh_generic; 2497 nfsm_srvmtofh(fhp); 2498 if (v3) { 2499 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 2500 fxdr_hyper(tl, &toff); 2501 tl += 2; 2502 fxdr_hyper(tl, &verf); 2503 tl += 2; 2504 } else { 2505 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2506 toff = fxdr_unsigned(u_quad_t, *tl++); 2507 } 2508 off = toff; 2509 cnt = fxdr_unsigned(int, *tl); 2510 siz = ((cnt + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1)); 2511 xfer = NFS_SRVMAXDATA(nfsd); 2512 if (siz > xfer) 2513 siz = xfer; 2514 fullsiz = siz; 2515 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 2516 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2517 if (!error && vp->v_type != VDIR) { 2518 error = ENOTDIR; 2519 vput(vp); 2520 } 2521 if (error) { 2522 nfsm_reply(NFSX_UNSIGNED); 2523 nfsm_srvpostop_attr(getret, &at); 2524 return (0); 2525 } 2526 nqsrv_getl(vp, ND_READ); 2527 if (v3) { 2528 error = getret = VOP_GETATTR(vp, &at, cred, procp); 2529 #ifdef NFS3_STRICTVERF 2530 /* 2531 * XXX This check is too strict for Solaris 2.5 clients. 2532 */ 2533 if (!error && toff && verf != at.va_filerev) 2534 error = NFSERR_BAD_COOKIE; 2535 #endif 2536 } 2537 if (!error) 2538 error = nfsrv_access(vp, VEXEC, cred, rdonly, procp, 0); 2539 if (error) { 2540 vput(vp); 2541 nfsm_reply(NFSX_POSTOPATTR(v3)); 2542 nfsm_srvpostop_attr(getret, &at); 2543 return (0); 2544 } 2545 VOP_UNLOCK(vp, 0); 2546 MALLOC(rbuf, caddr_t, siz, M_TEMP, M_WAITOK); 2547 again: 2548 iv.iov_base = rbuf; 2549 iv.iov_len = fullsiz; 2550 io.uio_iov = &iv; 2551 io.uio_iovcnt = 1; 2552 io.uio_offset = (off_t)off; 2553 io.uio_resid = fullsiz; 2554 io.uio_segflg = UIO_SYSSPACE; 2555 io.uio_rw = UIO_READ; 2556 io.uio_procp = (struct proc *)0; 2557 eofflag = 0; 2558 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2559 2560 error = VOP_READDIR(vp, &io, cred, &eofflag, &cookies, &ncookies); 2561 2562 off = (off_t)io.uio_offset; 2563 if (!cookies && !error) 2564 error = NFSERR_PERM; 2565 if (v3) { 2566 getret = VOP_GETATTR(vp, &at, cred, procp); 2567 if (!error) 2568 error = getret; 2569 } 2570 2571 VOP_UNLOCK(vp, 0); 2572 if (error) { 2573 vrele(vp); 2574 FREE((caddr_t)rbuf, M_TEMP); 2575 if (cookies) 2576 free((caddr_t)cookies, M_TEMP); 2577 nfsm_reply(NFSX_POSTOPATTR(v3)); 2578 nfsm_srvpostop_attr(getret, &at); 2579 return (0); 2580 } 2581 if (io.uio_resid) { 2582 siz -= io.uio_resid; 2583 2584 /* 2585 * If nothing read, return eof 2586 * rpc reply 2587 */ 2588 if (siz == 0) { 2589 vrele(vp); 2590 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_COOKIEVERF(v3) + 2591 2 * NFSX_UNSIGNED); 2592 if (v3) { 2593 nfsm_srvpostop_attr(getret, &at); 2594 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 2595 txdr_hyper(&at.va_filerev, tl); 2596 tl += 2; 2597 } else 2598 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2599 *tl++ = nfs_false; 2600 *tl = nfs_true; 2601 FREE((caddr_t)rbuf, M_TEMP); 2602 FREE((caddr_t)cookies, M_TEMP); 2603 return (0); 2604 } 2605 } 2606 2607 /* 2608 * Check for degenerate cases of nothing useful read. 2609 * If so go try again 2610 */ 2611 cpos = rbuf; 2612 cend = rbuf + siz; 2613 dp = (struct dirent *)cpos; 2614 cookiep = cookies; 2615 2616 while (cpos < cend && ncookies > 0 && 2617 (dp->d_fileno == 0 || dp->d_type == DT_WHT)) { 2618 cpos += dp->d_reclen; 2619 dp = (struct dirent *)cpos; 2620 cookiep++; 2621 ncookies--; 2622 } 2623 if (cpos >= cend || ncookies == 0) { 2624 toff = off; 2625 siz = fullsiz; 2626 goto again; 2627 } 2628 2629 len = 3 * NFSX_UNSIGNED; /* paranoia, probably can be 0 */ 2630 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_COOKIEVERF(v3) + siz); 2631 if (v3) { 2632 nfsm_srvpostop_attr(getret, &at); 2633 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2634 txdr_hyper(&at.va_filerev, tl); 2635 } 2636 mp = mp2 = mb; 2637 bp = bpos; 2638 be = bp + M_TRAILINGSPACE(mp); 2639 2640 /* Loop through the records and build reply */ 2641 while (cpos < cend && ncookies > 0) { 2642 if (dp->d_fileno != 0 && dp->d_type != DT_WHT) { 2643 nlen = dp->d_namlen; 2644 rem = nfsm_rndup(nlen)-nlen; 2645 len += (4 * NFSX_UNSIGNED + nlen + rem); 2646 if (v3) 2647 len += 2 * NFSX_UNSIGNED; 2648 if (len > cnt) { 2649 eofflag = 0; 2650 break; 2651 } 2652 /* 2653 * Build the directory record xdr from 2654 * the dirent entry. 2655 */ 2656 nfsm_clget; 2657 *tl = nfs_true; 2658 bp += NFSX_UNSIGNED; 2659 if (v3) { 2660 nfsm_clget; 2661 *tl = 0; 2662 bp += NFSX_UNSIGNED; 2663 } 2664 nfsm_clget; 2665 *tl = txdr_unsigned(dp->d_fileno); 2666 bp += NFSX_UNSIGNED; 2667 nfsm_clget; 2668 *tl = txdr_unsigned(nlen); 2669 bp += NFSX_UNSIGNED; 2670 2671 /* And loop around copying the name */ 2672 xfer = nlen; 2673 cp = dp->d_name; 2674 while (xfer > 0) { 2675 nfsm_clget; 2676 if ((bp+xfer) > be) 2677 tsiz = be-bp; 2678 else 2679 tsiz = xfer; 2680 memcpy(bp, cp, tsiz); 2681 bp += tsiz; 2682 xfer -= tsiz; 2683 if (xfer > 0) 2684 cp += tsiz; 2685 } 2686 /* And null pad to an int32_t boundary */ 2687 for (i = 0; i < rem; i++) 2688 *bp++ = '\0'; 2689 nfsm_clget; 2690 2691 /* Finish off the record */ 2692 txdr_hyper(cookiep, &jar); 2693 if (v3) { 2694 *tl = jar.nfsuquad[0]; 2695 bp += NFSX_UNSIGNED; 2696 nfsm_clget; 2697 } 2698 *tl = jar.nfsuquad[1]; 2699 bp += NFSX_UNSIGNED; 2700 } 2701 cpos += dp->d_reclen; 2702 dp = (struct dirent *)cpos; 2703 cookiep++; 2704 ncookies--; 2705 } 2706 vrele(vp); 2707 nfsm_clget; 2708 *tl = nfs_false; 2709 bp += NFSX_UNSIGNED; 2710 nfsm_clget; 2711 if (eofflag) 2712 *tl = nfs_true; 2713 else 2714 *tl = nfs_false; 2715 bp += NFSX_UNSIGNED; 2716 if (mp != mb) { 2717 if (bp < be) 2718 mp->m_len = bp - mtod(mp, caddr_t); 2719 } else 2720 mp->m_len += bp - bpos; 2721 FREE((caddr_t)rbuf, M_TEMP); 2722 FREE((caddr_t)cookies, M_TEMP); 2723 nfsm_srvdone; 2724 } 2725 2726 int 2727 nfsrv_readdirplus(nfsd, slp, procp, mrq) 2728 struct nfsrv_descript *nfsd; 2729 struct nfssvc_sock *slp; 2730 struct proc *procp; 2731 struct mbuf **mrq; 2732 { 2733 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2734 struct mbuf *nam = nfsd->nd_nam; 2735 caddr_t dpos = nfsd->nd_dpos; 2736 struct ucred *cred = &nfsd->nd_cr; 2737 register char *bp, *be; 2738 register struct mbuf *mp; 2739 register struct dirent *dp; 2740 register caddr_t cp; 2741 register u_int32_t *tl; 2742 register int32_t t1; 2743 caddr_t bpos; 2744 struct mbuf *mb, *mb2, *mreq, *mp2; 2745 char *cpos, *cend, *cp2, *rbuf; 2746 struct vnode *vp, *nvp; 2747 struct flrep fl; 2748 nfsfh_t nfh; 2749 fhandle_t *fhp, *nfhp = (fhandle_t *)fl.fl_nfh; 2750 struct uio io; 2751 struct iovec iv; 2752 struct vattr va, at, *vap = &va; 2753 struct nfs_fattr *fp; 2754 int len, nlen, rem, xfer, tsiz, i, error = 0, getret = 1; 2755 int siz, cnt, fullsiz, eofflag, rdonly, cache, dirlen, ncookies; 2756 u_quad_t frev, off, toff, verf; 2757 off_t *cookies = NULL, *cookiep; 2758 2759 fhp = &nfh.fh_generic; 2760 nfsm_srvmtofh(fhp); 2761 nfsm_dissect(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 2762 fxdr_hyper(tl, &toff); 2763 tl += 2; 2764 fxdr_hyper(tl, &verf); 2765 tl += 2; 2766 siz = fxdr_unsigned(int, *tl++); 2767 cnt = fxdr_unsigned(int, *tl); 2768 off = toff; 2769 siz = ((siz + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1)); 2770 xfer = NFS_SRVMAXDATA(nfsd); 2771 if (siz > xfer) 2772 siz = xfer; 2773 fullsiz = siz; 2774 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 2775 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2776 if (!error && vp->v_type != VDIR) { 2777 error = ENOTDIR; 2778 vput(vp); 2779 } 2780 if (error) { 2781 nfsm_reply(NFSX_UNSIGNED); 2782 nfsm_srvpostop_attr(getret, &at); 2783 return (0); 2784 } 2785 error = getret = VOP_GETATTR(vp, &at, cred, procp); 2786 #ifdef NFS3_STRICTVERF 2787 /* 2788 * XXX This check is too strict for Solaris 2.5 clients. 2789 */ 2790 if (!error && toff && verf != at.va_filerev) 2791 error = NFSERR_BAD_COOKIE; 2792 #endif 2793 if (!error) { 2794 nqsrv_getl(vp, ND_READ); 2795 error = nfsrv_access(vp, VEXEC, cred, rdonly, procp, 0); 2796 } 2797 if (error) { 2798 vput(vp); 2799 nfsm_reply(NFSX_V3POSTOPATTR); 2800 nfsm_srvpostop_attr(getret, &at); 2801 return (0); 2802 } 2803 VOP_UNLOCK(vp, 0); 2804 2805 MALLOC(rbuf, caddr_t, siz, M_TEMP, M_WAITOK); 2806 again: 2807 iv.iov_base = rbuf; 2808 iv.iov_len = fullsiz; 2809 io.uio_iov = &iv; 2810 io.uio_iovcnt = 1; 2811 io.uio_offset = (off_t)off; 2812 io.uio_resid = fullsiz; 2813 io.uio_segflg = UIO_SYSSPACE; 2814 io.uio_rw = UIO_READ; 2815 io.uio_procp = (struct proc *)0; 2816 eofflag = 0; 2817 2818 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2819 2820 error = VOP_READDIR(vp, &io, cred, &eofflag, &cookies, &ncookies); 2821 2822 off = (u_quad_t)io.uio_offset; 2823 getret = VOP_GETATTR(vp, &at, cred, procp); 2824 2825 VOP_UNLOCK(vp, 0); 2826 2827 /* 2828 * If the VGET operation doesn't work for this filesystem, 2829 * we can't support readdirplus. Returning NOTSUPP should 2830 * make clients fall back to plain readdir. 2831 * There's no need to check for VPTOFH as well, we wouldn't 2832 * even be here otherwise. 2833 */ 2834 if (!getret) { 2835 if ((getret = VFS_VGET(vp->v_mount, at.va_fileid, &nvp))) 2836 getret = (getret == EOPNOTSUPP) ? 2837 NFSERR_NOTSUPP : NFSERR_IO; 2838 else 2839 vput(nvp); 2840 } 2841 2842 if (!cookies && !error) 2843 error = NFSERR_PERM; 2844 if (!error) 2845 error = getret; 2846 if (error) { 2847 vrele(vp); 2848 if (cookies) 2849 FREE((caddr_t)cookies, M_TEMP); 2850 FREE((caddr_t)rbuf, M_TEMP); 2851 nfsm_reply(NFSX_V3POSTOPATTR); 2852 nfsm_srvpostop_attr(getret, &at); 2853 return (0); 2854 } 2855 if (io.uio_resid) { 2856 siz -= io.uio_resid; 2857 2858 /* 2859 * If nothing read, return eof 2860 * rpc reply 2861 */ 2862 if (siz == 0) { 2863 vrele(vp); 2864 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF + 2865 2 * NFSX_UNSIGNED); 2866 nfsm_srvpostop_attr(getret, &at); 2867 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 2868 txdr_hyper(&at.va_filerev, tl); 2869 tl += 2; 2870 *tl++ = nfs_false; 2871 *tl = nfs_true; 2872 FREE((caddr_t)cookies, M_TEMP); 2873 FREE((caddr_t)rbuf, M_TEMP); 2874 return (0); 2875 } 2876 } 2877 2878 /* 2879 * Check for degenerate cases of nothing useful read. 2880 * If so go try again 2881 */ 2882 cpos = rbuf; 2883 cend = rbuf + siz; 2884 dp = (struct dirent *)cpos; 2885 cookiep = cookies; 2886 2887 while (cpos < cend && ncookies > 0 && 2888 (dp->d_fileno == 0 || dp->d_type == DT_WHT)) { 2889 cpos += dp->d_reclen; 2890 dp = (struct dirent *)cpos; 2891 cookiep++; 2892 ncookies--; 2893 } 2894 if (cpos >= cend || ncookies == 0) { 2895 toff = off; 2896 siz = fullsiz; 2897 goto again; 2898 } 2899 2900 dirlen = len = NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF + 2 * NFSX_UNSIGNED; 2901 nfsm_reply(cnt); 2902 nfsm_srvpostop_attr(getret, &at); 2903 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2904 txdr_hyper(&at.va_filerev, tl); 2905 mp = mp2 = mb; 2906 bp = bpos; 2907 be = bp + M_TRAILINGSPACE(mp); 2908 2909 /* Loop through the records and build reply */ 2910 while (cpos < cend && ncookies > 0) { 2911 if (dp->d_fileno != 0 && dp->d_type != DT_WHT) { 2912 nlen = dp->d_namlen; 2913 rem = nfsm_rndup(nlen)-nlen; 2914 2915 /* 2916 * For readdir_and_lookup get the vnode using 2917 * the file number. 2918 */ 2919 if (VFS_VGET(vp->v_mount, dp->d_fileno, &nvp)) 2920 goto invalid; 2921 memset((caddr_t)nfhp, 0, NFSX_V3FH); 2922 nfhp->fh_fsid = 2923 nvp->v_mount->mnt_stat.f_fsid; 2924 if (VFS_VPTOFH(nvp, &nfhp->fh_fid)) { 2925 vput(nvp); 2926 goto invalid; 2927 } 2928 if (VOP_GETATTR(nvp, vap, cred, procp)) { 2929 vput(nvp); 2930 goto invalid; 2931 } 2932 vput(nvp); 2933 2934 /* 2935 * If either the dircount or maxcount will be 2936 * exceeded, get out now. Both of these lengths 2937 * are calculated conservatively, including all 2938 * XDR overheads. 2939 */ 2940 len += (7 * NFSX_UNSIGNED + nlen + rem + NFSX_V3FH + 2941 NFSX_V3POSTOPATTR); 2942 dirlen += (6 * NFSX_UNSIGNED + nlen + rem); 2943 if (len > cnt || dirlen > fullsiz) { 2944 eofflag = 0; 2945 break; 2946 } 2947 2948 /* 2949 * Build the directory record xdr from 2950 * the dirent entry. 2951 */ 2952 fp = (struct nfs_fattr *)&fl.fl_fattr; 2953 nfsm_srvfillattr(vap, fp); 2954 fl.fl_fhsize = txdr_unsigned(NFSX_V3FH); 2955 fl.fl_fhok = nfs_true; 2956 fl.fl_postopok = nfs_true; 2957 txdr_hyper(cookiep, fl.fl_off.nfsuquad); 2958 2959 nfsm_clget; 2960 *tl = nfs_true; 2961 bp += NFSX_UNSIGNED; 2962 nfsm_clget; 2963 *tl = 0; 2964 bp += NFSX_UNSIGNED; 2965 nfsm_clget; 2966 *tl = txdr_unsigned(dp->d_fileno); 2967 bp += NFSX_UNSIGNED; 2968 nfsm_clget; 2969 *tl = txdr_unsigned(nlen); 2970 bp += NFSX_UNSIGNED; 2971 2972 /* And loop around copying the name */ 2973 xfer = nlen; 2974 cp = dp->d_name; 2975 while (xfer > 0) { 2976 nfsm_clget; 2977 if ((bp + xfer) > be) 2978 tsiz = be - bp; 2979 else 2980 tsiz = xfer; 2981 memcpy(bp, cp, tsiz); 2982 bp += tsiz; 2983 xfer -= tsiz; 2984 if (xfer > 0) 2985 cp += tsiz; 2986 } 2987 /* And null pad to an int32_t boundary */ 2988 for (i = 0; i < rem; i++) 2989 *bp++ = '\0'; 2990 2991 /* 2992 * Now copy the flrep structure out. 2993 */ 2994 xfer = sizeof (struct flrep); 2995 cp = (caddr_t)&fl; 2996 while (xfer > 0) { 2997 nfsm_clget; 2998 if ((bp + xfer) > be) 2999 tsiz = be - bp; 3000 else 3001 tsiz = xfer; 3002 memcpy(bp, cp, tsiz); 3003 bp += tsiz; 3004 xfer -= tsiz; 3005 if (xfer > 0) 3006 cp += tsiz; 3007 } 3008 } 3009 invalid: 3010 cpos += dp->d_reclen; 3011 dp = (struct dirent *)cpos; 3012 cookiep++; 3013 ncookies--; 3014 } 3015 vrele(vp); 3016 nfsm_clget; 3017 *tl = nfs_false; 3018 bp += NFSX_UNSIGNED; 3019 nfsm_clget; 3020 if (eofflag) 3021 *tl = nfs_true; 3022 else 3023 *tl = nfs_false; 3024 bp += NFSX_UNSIGNED; 3025 if (mp != mb) { 3026 if (bp < be) 3027 mp->m_len = bp - mtod(mp, caddr_t); 3028 } else 3029 mp->m_len += bp - bpos; 3030 FREE((caddr_t)cookies, M_TEMP); 3031 FREE((caddr_t)rbuf, M_TEMP); 3032 nfsm_srvdone; 3033 } 3034 3035 /* 3036 * nfs commit service 3037 */ 3038 int 3039 nfsrv_commit(nfsd, slp, procp, mrq) 3040 struct nfsrv_descript *nfsd; 3041 struct nfssvc_sock *slp; 3042 struct proc *procp; 3043 struct mbuf **mrq; 3044 { 3045 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3046 struct mbuf *nam = nfsd->nd_nam; 3047 caddr_t dpos = nfsd->nd_dpos; 3048 struct ucred *cred = &nfsd->nd_cr; 3049 struct vattr bfor, aft; 3050 struct vnode *vp; 3051 nfsfh_t nfh; 3052 fhandle_t *fhp; 3053 register u_int32_t *tl; 3054 register int32_t t1; 3055 caddr_t bpos; 3056 int error = 0, rdonly, for_ret = 1, aft_ret = 1, cnt, cache; 3057 char *cp2; 3058 struct mbuf *mb, *mb2, *mreq; 3059 u_quad_t frev, off; 3060 3061 #ifndef nolint 3062 cache = 0; 3063 #endif 3064 fhp = &nfh.fh_generic; 3065 nfsm_srvmtofh(fhp); 3066 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 3067 3068 /* 3069 * XXX At this time VOP_FSYNC() does not accept offset and byte 3070 * count parameters, so these arguments are useless (someday maybe). 3071 */ 3072 fxdr_hyper(tl, &off); 3073 tl += 2; 3074 cnt = fxdr_unsigned(int, *tl); 3075 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 3076 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 3077 if (error) { 3078 nfsm_reply(2 * NFSX_UNSIGNED); 3079 nfsm_srvwcc_data(for_ret, &bfor, aft_ret, &aft); 3080 return (0); 3081 } 3082 for_ret = VOP_GETATTR(vp, &bfor, cred, procp); 3083 error = VOP_FSYNC(vp, cred, FSYNC_WAIT, procp); 3084 aft_ret = VOP_GETATTR(vp, &aft, cred, procp); 3085 vput(vp); 3086 nfsm_reply(NFSX_V3WCCDATA + NFSX_V3WRITEVERF); 3087 nfsm_srvwcc_data(for_ret, &bfor, aft_ret, &aft); 3088 if (!error) { 3089 nfsm_build(tl, u_int32_t *, NFSX_V3WRITEVERF); 3090 *tl++ = txdr_unsigned(boottime.tv_sec); 3091 *tl = txdr_unsigned(boottime.tv_usec); 3092 } else 3093 return (0); 3094 nfsm_srvdone; 3095 } 3096 3097 /* 3098 * nfs statfs service 3099 */ 3100 int 3101 nfsrv_statfs(nfsd, slp, procp, mrq) 3102 struct nfsrv_descript *nfsd; 3103 struct nfssvc_sock *slp; 3104 struct proc *procp; 3105 struct mbuf **mrq; 3106 { 3107 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3108 struct mbuf *nam = nfsd->nd_nam; 3109 caddr_t dpos = nfsd->nd_dpos; 3110 struct ucred *cred = &nfsd->nd_cr; 3111 register struct statfs *sf; 3112 register struct nfs_statfs *sfp; 3113 register u_int32_t *tl; 3114 register int32_t t1; 3115 caddr_t bpos; 3116 int error = 0, rdonly, cache, getret = 1; 3117 int v3 = (nfsd->nd_flag & ND_NFSV3); 3118 char *cp2; 3119 struct mbuf *mb, *mb2, *mreq; 3120 struct vnode *vp; 3121 struct vattr at; 3122 nfsfh_t nfh; 3123 fhandle_t *fhp; 3124 struct statfs statfs; 3125 u_quad_t frev, tval; 3126 3127 #ifndef nolint 3128 cache = 0; 3129 #endif 3130 fhp = &nfh.fh_generic; 3131 nfsm_srvmtofh(fhp); 3132 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 3133 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 3134 if (error) { 3135 nfsm_reply(NFSX_UNSIGNED); 3136 nfsm_srvpostop_attr(getret, &at); 3137 return (0); 3138 } 3139 sf = &statfs; 3140 error = VFS_STATFS(vp->v_mount, sf, procp); 3141 getret = VOP_GETATTR(vp, &at, cred, procp); 3142 vput(vp); 3143 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_STATFS(v3)); 3144 if (v3) 3145 nfsm_srvpostop_attr(getret, &at); 3146 if (error) 3147 return (0); 3148 nfsm_build(sfp, struct nfs_statfs *, NFSX_STATFS(v3)); 3149 if (v3) { 3150 tval = (u_quad_t)((quad_t)sf->f_blocks * (quad_t)sf->f_bsize); 3151 txdr_hyper(&tval, &sfp->sf_tbytes); 3152 tval = (u_quad_t)((quad_t)sf->f_bfree * (quad_t)sf->f_bsize); 3153 txdr_hyper(&tval, &sfp->sf_fbytes); 3154 tval = (u_quad_t)((quad_t)sf->f_bavail * (quad_t)sf->f_bsize); 3155 txdr_hyper(&tval, &sfp->sf_abytes); 3156 tval = (u_quad_t)sf->f_files; 3157 txdr_hyper(&tval, &sfp->sf_tfiles); 3158 tval = (u_quad_t)sf->f_ffree; 3159 txdr_hyper(&tval, &sfp->sf_ffiles); 3160 txdr_hyper(&tval, &sfp->sf_afiles); 3161 sfp->sf_invarsec = 0; 3162 } else { 3163 sfp->sf_tsize = txdr_unsigned(NFS_MAXDGRAMDATA); 3164 sfp->sf_bsize = txdr_unsigned(sf->f_bsize); 3165 sfp->sf_blocks = txdr_unsigned(sf->f_blocks); 3166 sfp->sf_bfree = txdr_unsigned(sf->f_bfree); 3167 sfp->sf_bavail = txdr_unsigned(sf->f_bavail); 3168 } 3169 nfsm_srvdone; 3170 } 3171 3172 /* 3173 * nfs fsinfo service 3174 */ 3175 int 3176 nfsrv_fsinfo(nfsd, slp, procp, mrq) 3177 struct nfsrv_descript *nfsd; 3178 struct nfssvc_sock *slp; 3179 struct proc *procp; 3180 struct mbuf **mrq; 3181 { 3182 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3183 struct mbuf *nam = nfsd->nd_nam; 3184 caddr_t dpos = nfsd->nd_dpos; 3185 struct ucred *cred = &nfsd->nd_cr; 3186 register u_int32_t *tl; 3187 register struct nfsv3_fsinfo *sip; 3188 register int32_t t1; 3189 caddr_t bpos; 3190 int error = 0, rdonly, cache, getret = 1, pref; 3191 char *cp2; 3192 struct mbuf *mb, *mb2, *mreq; 3193 struct vnode *vp; 3194 struct vattr at; 3195 nfsfh_t nfh; 3196 fhandle_t *fhp; 3197 u_quad_t frev, maxfsize; 3198 struct statfs sb; 3199 3200 #ifndef nolint 3201 cache = 0; 3202 #endif 3203 fhp = &nfh.fh_generic; 3204 nfsm_srvmtofh(fhp); 3205 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 3206 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 3207 if (error) { 3208 nfsm_reply(NFSX_UNSIGNED); 3209 nfsm_srvpostop_attr(getret, &at); 3210 return (0); 3211 } 3212 3213 /* XXX Try to make a guess on the max file size. */ 3214 VFS_STATFS(vp->v_mount, &sb, (struct proc *)0); 3215 maxfsize = (u_quad_t)0x80000000 * sb.f_bsize - 1; 3216 3217 getret = VOP_GETATTR(vp, &at, cred, procp); 3218 vput(vp); 3219 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3FSINFO); 3220 nfsm_srvpostop_attr(getret, &at); 3221 nfsm_build(sip, struct nfsv3_fsinfo *, NFSX_V3FSINFO); 3222 3223 /* 3224 * XXX 3225 * There should be file system VFS OP(s) to get this information. 3226 * For now, assume ufs. 3227 */ 3228 if (slp->ns_so->so_type == SOCK_DGRAM) 3229 pref = NFS_MAXDGRAMDATA; 3230 else 3231 pref = NFS_MAXDATA; 3232 sip->fs_rtmax = txdr_unsigned(NFS_MAXDATA); 3233 sip->fs_rtpref = txdr_unsigned(pref); 3234 sip->fs_rtmult = txdr_unsigned(NFS_FABLKSIZE); 3235 sip->fs_wtmax = txdr_unsigned(NFS_MAXDATA); 3236 sip->fs_wtpref = txdr_unsigned(pref); 3237 sip->fs_wtmult = txdr_unsigned(NFS_FABLKSIZE); 3238 sip->fs_dtpref = txdr_unsigned(pref); 3239 txdr_hyper(&maxfsize, &sip->fs_maxfilesize); 3240 sip->fs_timedelta.nfsv3_sec = 0; 3241 sip->fs_timedelta.nfsv3_nsec = txdr_unsigned(1); 3242 sip->fs_properties = txdr_unsigned(NFSV3FSINFO_LINK | 3243 NFSV3FSINFO_SYMLINK | NFSV3FSINFO_HOMOGENEOUS | 3244 NFSV3FSINFO_CANSETTIME); 3245 nfsm_srvdone; 3246 } 3247 3248 /* 3249 * nfs pathconf service 3250 */ 3251 int 3252 nfsrv_pathconf(nfsd, slp, procp, mrq) 3253 struct nfsrv_descript *nfsd; 3254 struct nfssvc_sock *slp; 3255 struct proc *procp; 3256 struct mbuf **mrq; 3257 { 3258 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3259 struct mbuf *nam = nfsd->nd_nam; 3260 caddr_t dpos = nfsd->nd_dpos; 3261 struct ucred *cred = &nfsd->nd_cr; 3262 register u_int32_t *tl; 3263 register struct nfsv3_pathconf *pc; 3264 register int32_t t1; 3265 caddr_t bpos; 3266 int error = 0, rdonly, cache, getret = 1; 3267 register_t linkmax, namemax, chownres, notrunc; 3268 char *cp2; 3269 struct mbuf *mb, *mb2, *mreq; 3270 struct vnode *vp; 3271 struct vattr at; 3272 nfsfh_t nfh; 3273 fhandle_t *fhp; 3274 u_quad_t frev; 3275 3276 #ifndef nolint 3277 cache = 0; 3278 #endif 3279 fhp = &nfh.fh_generic; 3280 nfsm_srvmtofh(fhp); 3281 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 3282 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 3283 if (error) { 3284 nfsm_reply(NFSX_UNSIGNED); 3285 nfsm_srvpostop_attr(getret, &at); 3286 return (0); 3287 } 3288 error = VOP_PATHCONF(vp, _PC_LINK_MAX, &linkmax); 3289 if (!error) 3290 error = VOP_PATHCONF(vp, _PC_NAME_MAX, &namemax); 3291 if (!error) 3292 error = VOP_PATHCONF(vp, _PC_CHOWN_RESTRICTED, &chownres); 3293 if (!error) 3294 error = VOP_PATHCONF(vp, _PC_NO_TRUNC, ¬runc); 3295 getret = VOP_GETATTR(vp, &at, cred, procp); 3296 vput(vp); 3297 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3PATHCONF); 3298 nfsm_srvpostop_attr(getret, &at); 3299 if (error) 3300 return (0); 3301 nfsm_build(pc, struct nfsv3_pathconf *, NFSX_V3PATHCONF); 3302 3303 pc->pc_linkmax = txdr_unsigned(linkmax); 3304 pc->pc_namemax = txdr_unsigned(namemax); 3305 pc->pc_notrunc = txdr_unsigned(notrunc); 3306 pc->pc_chownrestricted = txdr_unsigned(chownres); 3307 3308 /* 3309 * These should probably be supported by VOP_PATHCONF(), but 3310 * until msdosfs is exportable (why would you want to?), the 3311 * Unix defaults should be ok. 3312 */ 3313 pc->pc_caseinsensitive = nfs_false; 3314 pc->pc_casepreserving = nfs_true; 3315 nfsm_srvdone; 3316 } 3317 3318 /* 3319 * Null operation, used by clients to ping server 3320 */ 3321 /* ARGSUSED */ 3322 int 3323 nfsrv_null(nfsd, slp, procp, mrq) 3324 struct nfsrv_descript *nfsd; 3325 struct nfssvc_sock *slp; 3326 struct proc *procp; 3327 struct mbuf **mrq; 3328 { 3329 struct mbuf *mrep = nfsd->nd_mrep; 3330 caddr_t bpos; 3331 int error = NFSERR_RETVOID, cache = 0; 3332 struct mbuf *mb, *mreq; 3333 u_quad_t frev; 3334 3335 nfsm_reply(0); 3336 return (0); 3337 } 3338 3339 /* 3340 * No operation, used for obsolete procedures 3341 */ 3342 /* ARGSUSED */ 3343 int 3344 nfsrv_noop(nfsd, slp, procp, mrq) 3345 struct nfsrv_descript *nfsd; 3346 struct nfssvc_sock *slp; 3347 struct proc *procp; 3348 struct mbuf **mrq; 3349 { 3350 struct mbuf *mrep = nfsd->nd_mrep; 3351 caddr_t bpos; 3352 int error, cache = 0; 3353 struct mbuf *mb, *mreq; 3354 u_quad_t frev; 3355 3356 if (nfsd->nd_repstat) 3357 error = nfsd->nd_repstat; 3358 else 3359 error = EPROCUNAVAIL; 3360 nfsm_reply(0); 3361 return (0); 3362 } 3363 3364 /* 3365 * Perform access checking for vnodes obtained from file handles that would 3366 * refer to files already opened by a Unix client. You cannot just use 3367 * vn_writechk() and VOP_ACCESS() for two reasons. 3368 * 1 - You must check for exported rdonly as well as MNT_RDONLY for the write case 3369 * 2 - The owner is to be given access irrespective of mode bits for some 3370 * operations, so that processes that chmod after opening a file don't 3371 * break. I don't like this because it opens a security hole, but since 3372 * the nfs server opens a security hole the size of a barn door anyhow, 3373 * what the heck. 3374 * 3375 * The exception to rule 2 is EPERM. If a file is IMMUTABLE, VOP_ACCESS() 3376 * will return EPERM instead of EACCESS. EPERM is always an error. 3377 */ 3378 int 3379 nfsrv_access(vp, flags, cred, rdonly, p, override) 3380 register struct vnode *vp; 3381 int flags; 3382 register struct ucred *cred; 3383 int rdonly; 3384 struct proc *p; 3385 { 3386 struct vattr vattr; 3387 int error; 3388 if (flags & VWRITE) { 3389 /* Just vn_writechk() changed to check rdonly */ 3390 /* 3391 * Disallow write attempts on read-only file systems; 3392 * unless the file is a socket or a block or character 3393 * device resident on the file system. 3394 */ 3395 if (rdonly || (vp->v_mount->mnt_flag & MNT_RDONLY)) { 3396 switch (vp->v_type) { 3397 case VREG: 3398 case VDIR: 3399 case VLNK: 3400 return (EROFS); 3401 default: 3402 break; 3403 } 3404 } 3405 /* 3406 * If there's shared text associated with 3407 * the inode, try to free it up once. If 3408 * we fail, we can't allow writing. 3409 */ 3410 #if defined(UVM) 3411 if ((vp->v_flag & VTEXT) && !uvm_vnp_uncache(vp)) 3412 return (ETXTBSY); 3413 #else 3414 if ((vp->v_flag & VTEXT) && !vnode_pager_uncache(vp)) 3415 return (ETXTBSY); 3416 #endif 3417 } 3418 error = VOP_GETATTR(vp, &vattr, cred, p); 3419 if (error) 3420 return (error); 3421 error = VOP_ACCESS(vp, flags, cred, p); 3422 /* 3423 * Allow certain operations for the owner (reads and writes 3424 * on files that are already open). 3425 */ 3426 if (override && error == EACCES && cred->cr_uid == vattr.va_uid) 3427 error = 0; 3428 return error; 3429 } 3430
Indexes created Wed Sep 24 05:09:52 GMT 2025