nfs_serv.c revision 1.34
1 /* $NetBSD: nfs_serv.c,v 1.34 1997/05/12 23:37:12 fvdl Exp $ */ 2 3 /* 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Rick Macklem at The University of Guelph. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)nfs_serv.c 8.7 (Berkeley) 5/14/95 39 */ 40 41 /* 42 * nfs version 2 and 3 server calls to vnode ops 43 * - these routines generally have 3 phases 44 * 1 - break down and validate rpc request in mbuf list 45 * 2 - do the vnode ops for the request 46 * (surprisingly ?? many are very similar to syscalls in vfs_syscalls.c) 47 * 3 - build the rpc reply in an mbuf list 48 * nb: 49 * - do not mix the phases, since the nfsm_?? macros can return failures 50 * on a bad rpc or similar and do not do any vrele() or vput()'s 51 * 52 * - the nfsm_reply() macro generates an nfs rpc reply with the nfs 53 * error number iff error != 0 whereas 54 * returning an error from the server function implies a fatal error 55 * such as a badly constructed rpc request that should be dropped without 56 * a reply. 57 * For Version 3, nfsm_reply() does not return for the error case, since 58 * most version 3 rpcs return more than the status for error cases. 59 */ 60 61 #include <sys/param.h> 62 #include <sys/systm.h> 63 #include <sys/proc.h> 64 #include <sys/file.h> 65 #include <sys/namei.h> 66 #include <sys/vnode.h> 67 #include <sys/mount.h> 68 #include <sys/socket.h> 69 #include <sys/socketvar.h> 70 #include <sys/mbuf.h> 71 #include <sys/dirent.h> 72 #include <sys/stat.h> 73 #include <sys/kernel.h> 74 #include <ufs/ufs/dir.h> 75 76 #include <vm/vm.h> 77 78 #include <nfs/nfsproto.h> 79 #include <nfs/rpcv2.h> 80 #include <nfs/nfs.h> 81 #include <nfs/xdr_subs.h> 82 #include <nfs/nfsm_subs.h> 83 #include <nfs/nqnfs.h> 84 #include <nfs/nfs_var.h> 85 86 /* Global vars */ 87 extern u_int32_t nfs_xdrneg1; 88 extern u_int32_t nfs_false, nfs_true; 89 extern enum vtype nv3tov_type[8]; 90 extern struct nfsstats nfsstats; 91 extern nfstype nfsv2_type[9]; 92 extern nfstype nfsv3_type[9]; 93 int nfsrvw_procrastinate = NFS_GATHERDELAY * 1000; 94 95 /* 96 * nfs v3 access service 97 */ 98 int 99 nfsrv3_access(nfsd, slp, procp, mrq) 100 struct nfsrv_descript *nfsd; 101 struct nfssvc_sock *slp; 102 struct proc *procp; 103 struct mbuf **mrq; 104 { 105 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 106 struct mbuf *nam = nfsd->nd_nam; 107 caddr_t dpos = nfsd->nd_dpos; 108 struct ucred *cred = &nfsd->nd_cr; 109 struct vnode *vp; 110 nfsfh_t nfh; 111 fhandle_t *fhp; 112 register u_int32_t *tl; 113 register int32_t t1; 114 caddr_t bpos; 115 int error = 0, rdonly, cache = 0, getret; 116 char *cp2; 117 struct mbuf *mb, *mreq, *mb2; 118 struct vattr va; 119 u_long inmode, testmode, outmode; 120 u_quad_t frev; 121 122 fhp = &nfh.fh_generic; 123 nfsm_srvmtofh(fhp); 124 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 125 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, &rdonly, 126 (nfsd->nd_flag & ND_KERBAUTH)); 127 if (error) { 128 nfsm_reply(NFSX_UNSIGNED); 129 nfsm_srvpostop_attr(1, (struct vattr *)0); 130 return (0); 131 } 132 inmode = fxdr_unsigned(u_int32_t, *tl); 133 outmode = 0; 134 if ((inmode & NFSV3ACCESS_READ) && 135 nfsrv_access(vp, VREAD, cred, rdonly, procp, 0) == 0) 136 outmode |= NFSV3ACCESS_READ; 137 if (vp->v_type != VDIR) { 138 testmode = inmode & (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND); 139 if (testmode && 140 nfsrv_access(vp, VWRITE, cred, rdonly, procp, 0) == 0) 141 outmode |= testmode; 142 if ((inmode & NFSV3ACCESS_EXECUTE) && 143 nfsrv_access(vp, VEXEC, cred, rdonly, procp, 0) == 0) 144 outmode |= NFSV3ACCESS_EXECUTE; 145 } else { 146 testmode = inmode & (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | 147 NFSV3ACCESS_DELETE); 148 if (testmode && 149 nfsrv_access(vp, VWRITE, cred, rdonly, procp, 0) == 0) 150 outmode |= testmode; 151 if ((inmode & NFSV3ACCESS_LOOKUP) && 152 nfsrv_access(vp, VEXEC, cred, rdonly, procp, 0) == 0) 153 outmode |= NFSV3ACCESS_LOOKUP; 154 } 155 getret = VOP_GETATTR(vp, &va, cred, procp); 156 vput(vp); 157 nfsm_reply(NFSX_POSTOPATTR(1) + NFSX_UNSIGNED); 158 nfsm_srvpostop_attr(getret, &va); 159 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 160 *tl = txdr_unsigned(outmode); 161 nfsm_srvdone; 162 } 163 164 /* 165 * nfs getattr service 166 */ 167 int 168 nfsrv_getattr(nfsd, slp, procp, mrq) 169 struct nfsrv_descript *nfsd; 170 struct nfssvc_sock *slp; 171 struct proc *procp; 172 struct mbuf **mrq; 173 { 174 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 175 struct mbuf *nam = nfsd->nd_nam; 176 caddr_t dpos = nfsd->nd_dpos; 177 struct ucred *cred = &nfsd->nd_cr; 178 register struct nfs_fattr *fp; 179 struct vattr va; 180 struct vnode *vp; 181 nfsfh_t nfh; 182 fhandle_t *fhp; 183 register u_int32_t *tl; 184 register int32_t t1; 185 caddr_t bpos; 186 int error = 0, rdonly, cache; 187 char *cp2; 188 struct mbuf *mb, *mb2, *mreq; 189 u_quad_t frev; 190 191 fhp = &nfh.fh_generic; 192 nfsm_srvmtofh(fhp); 193 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, &rdonly, 194 (nfsd->nd_flag & ND_KERBAUTH)); 195 if (error) { 196 nfsm_reply(0); 197 return (0); 198 } 199 nqsrv_getl(vp, ND_READ); 200 error = VOP_GETATTR(vp, &va, cred, procp); 201 vput(vp); 202 nfsm_reply(NFSX_FATTR(nfsd->nd_flag & ND_NFSV3)); 203 if (error) 204 return (0); 205 nfsm_build(fp, struct nfs_fattr *, NFSX_FATTR(nfsd->nd_flag & ND_NFSV3)); 206 nfsm_srvfillattr(&va, fp); 207 nfsm_srvdone; 208 } 209 210 /* 211 * nfs setattr service 212 */ 213 int 214 nfsrv_setattr(nfsd, slp, procp, mrq) 215 struct nfsrv_descript *nfsd; 216 struct nfssvc_sock *slp; 217 struct proc *procp; 218 struct mbuf **mrq; 219 { 220 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 221 struct mbuf *nam = nfsd->nd_nam; 222 caddr_t dpos = nfsd->nd_dpos; 223 struct ucred *cred = &nfsd->nd_cr; 224 struct vattr va, preat; 225 register struct nfsv2_sattr *sp; 226 register struct nfs_fattr *fp; 227 struct vnode *vp; 228 nfsfh_t nfh; 229 fhandle_t *fhp; 230 register u_int32_t *tl; 231 register int32_t t1; 232 caddr_t bpos; 233 int error = 0, rdonly, cache, preat_ret = 1, postat_ret = 1; 234 int v3 = (nfsd->nd_flag & ND_NFSV3), gcheck = 0; 235 char *cp2; 236 struct mbuf *mb, *mb2, *mreq; 237 u_quad_t frev; 238 struct timespec guard; 239 240 fhp = &nfh.fh_generic; 241 nfsm_srvmtofh(fhp); 242 VATTR_NULL(&va); 243 if (v3) { 244 nfsm_srvsattr(&va); 245 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 246 gcheck = fxdr_unsigned(int, *tl); 247 if (gcheck) { 248 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 249 fxdr_nfsv3time(tl, &guard); 250 } 251 } else { 252 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 253 /* 254 * Nah nah nah nah na nah 255 * There is a bug in the Sun client that puts 0xffff in the mode 256 * field of sattr when it should put in 0xffffffff. The u_short 257 * doesn't sign extend. 258 * --> check the low order 2 bytes for 0xffff 259 */ 260 if ((fxdr_unsigned(int, sp->sa_mode) & 0xffff) != 0xffff) 261 va.va_mode = nfstov_mode(sp->sa_mode); 262 if (sp->sa_uid != nfs_xdrneg1) 263 va.va_uid = fxdr_unsigned(uid_t, sp->sa_uid); 264 if (sp->sa_gid != nfs_xdrneg1) 265 va.va_gid = fxdr_unsigned(gid_t, sp->sa_gid); 266 if (sp->sa_size != nfs_xdrneg1) 267 va.va_size = fxdr_unsigned(u_quad_t, sp->sa_size); 268 if (sp->sa_atime.nfsv2_sec != nfs_xdrneg1) { 269 #ifdef notyet 270 fxdr_nfsv2time(&sp->sa_atime, &va.va_atime); 271 #else 272 va.va_atime.tv_sec = 273 fxdr_unsigned(u_int32_t,sp->sa_atime.nfsv2_sec); 274 va.va_atime.tv_nsec = 0; 275 #endif 276 } 277 if (sp->sa_mtime.nfsv2_sec != nfs_xdrneg1) 278 fxdr_nfsv2time(&sp->sa_mtime, &va.va_mtime); 279 280 } 281 282 /* 283 * Now that we have all the fields, lets do it. 284 */ 285 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, &rdonly, 286 (nfsd->nd_flag & ND_KERBAUTH)); 287 if (error) { 288 nfsm_reply(2 * NFSX_UNSIGNED); 289 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 290 return (0); 291 } 292 nqsrv_getl(vp, ND_WRITE); 293 if (v3) { 294 error = preat_ret = VOP_GETATTR(vp, &preat, cred, procp); 295 if (!error && gcheck && 296 (preat.va_ctime.tv_sec != guard.tv_sec || 297 preat.va_ctime.tv_nsec != guard.tv_nsec)) 298 error = NFSERR_NOT_SYNC; 299 if (error) { 300 vput(vp); 301 nfsm_reply(NFSX_WCCDATA(v3)); 302 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 303 return (0); 304 } 305 } 306 307 /* 308 * If the size is being changed write acces is required, otherwise 309 * just check for a read only file system. 310 */ 311 if (va.va_size == ((u_quad_t)((quad_t) -1))) { 312 if (rdonly || (vp->v_mount->mnt_flag & MNT_RDONLY)) { 313 error = EROFS; 314 goto out; 315 } 316 } else { 317 if (vp->v_type == VDIR) { 318 error = EISDIR; 319 goto out; 320 } else if ((error = nfsrv_access(vp, VWRITE, cred, rdonly, 321 procp, 0)) != 0) 322 goto out; 323 } 324 error = VOP_SETATTR(vp, &va, cred, procp); 325 postat_ret = VOP_GETATTR(vp, &va, cred, procp); 326 if (!error) 327 error = postat_ret; 328 out: 329 vput(vp); 330 nfsm_reply(NFSX_WCCORFATTR(v3)); 331 if (v3) { 332 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 333 return (0); 334 } else { 335 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 336 nfsm_srvfillattr(&va, fp); 337 } 338 nfsm_srvdone; 339 } 340 341 /* 342 * nfs lookup rpc 343 */ 344 int 345 nfsrv_lookup(nfsd, slp, procp, mrq) 346 struct nfsrv_descript *nfsd; 347 struct nfssvc_sock *slp; 348 struct proc *procp; 349 struct mbuf **mrq; 350 { 351 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 352 struct mbuf *nam = nfsd->nd_nam; 353 caddr_t dpos = nfsd->nd_dpos; 354 struct ucred *cred = &nfsd->nd_cr; 355 register struct nfs_fattr *fp; 356 struct nameidata nd; 357 struct vnode *vp, *dirp; 358 nfsfh_t nfh; 359 fhandle_t *fhp; 360 register caddr_t cp; 361 register u_int32_t *tl; 362 register int32_t t1; 363 caddr_t bpos; 364 int error = 0, cache, len, dirattr_ret = 1; 365 int v3 = (nfsd->nd_flag & ND_NFSV3); 366 char *cp2; 367 struct mbuf *mb, *mb2, *mreq; 368 struct vattr va, dirattr; 369 u_quad_t frev; 370 371 fhp = &nfh.fh_generic; 372 nfsm_srvmtofh(fhp); 373 nfsm_srvnamesiz(len); 374 nd.ni_cnd.cn_cred = cred; 375 nd.ni_cnd.cn_nameiop = LOOKUP; 376 nd.ni_cnd.cn_flags = LOCKLEAF | SAVESTART; 377 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 378 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH)); 379 if (dirp) { 380 if (v3) 381 dirattr_ret = VOP_GETATTR(dirp, &dirattr, cred, 382 procp); 383 vrele(dirp); 384 } 385 if (error) { 386 nfsm_reply(NFSX_POSTOPATTR(v3)); 387 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 388 return (0); 389 } 390 nqsrv_getl(nd.ni_startdir, ND_READ); 391 vrele(nd.ni_startdir); 392 FREE(nd.ni_cnd.cn_pnbuf, M_NAMEI); 393 vp = nd.ni_vp; 394 bzero((caddr_t)fhp, sizeof(nfh)); 395 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; 396 error = VFS_VPTOFH(vp, &fhp->fh_fid); 397 if (!error) 398 error = VOP_GETATTR(vp, &va, cred, procp); 399 vput(vp); 400 nfsm_reply(NFSX_SRVFH(v3) + NFSX_POSTOPORFATTR(v3) + NFSX_POSTOPATTR(v3)); 401 if (error) { 402 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 403 return (0); 404 } 405 nfsm_srvfhtom(fhp, v3); 406 if (v3) { 407 nfsm_srvpostop_attr(0, &va); 408 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 409 } else { 410 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 411 nfsm_srvfillattr(&va, fp); 412 } 413 nfsm_srvdone; 414 } 415 416 /* 417 * nfs readlink service 418 */ 419 int 420 nfsrv_readlink(nfsd, slp, procp, mrq) 421 struct nfsrv_descript *nfsd; 422 struct nfssvc_sock *slp; 423 struct proc *procp; 424 struct mbuf **mrq; 425 { 426 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 427 struct mbuf *nam = nfsd->nd_nam; 428 caddr_t dpos = nfsd->nd_dpos; 429 struct ucred *cred = &nfsd->nd_cr; 430 struct iovec iv[(NFS_MAXPATHLEN+MLEN-1)/MLEN]; 431 register struct iovec *ivp = iv; 432 register struct mbuf *mp; 433 register u_int32_t *tl; 434 register int32_t t1; 435 caddr_t bpos; 436 int error = 0, rdonly, cache, i, tlen, len, getret; 437 int v3 = (nfsd->nd_flag & ND_NFSV3); 438 char *cp2; 439 struct mbuf *mb, *mb2, *mp2 = NULL, *mp3 = NULL, *mreq; 440 struct vnode *vp; 441 struct vattr attr; 442 nfsfh_t nfh; 443 fhandle_t *fhp; 444 struct uio io, *uiop = &io; 445 u_quad_t frev; 446 447 fhp = &nfh.fh_generic; 448 nfsm_srvmtofh(fhp); 449 len = 0; 450 i = 0; 451 while (len < NFS_MAXPATHLEN) { 452 MGET(mp, M_WAIT, MT_DATA); 453 MCLGET(mp, M_WAIT); 454 mp->m_len = NFSMSIZ(mp); 455 if (len == 0) 456 mp3 = mp2 = mp; 457 else { 458 mp2->m_next = mp; 459 mp2 = mp; 460 } 461 if ((len+mp->m_len) > NFS_MAXPATHLEN) { 462 mp->m_len = NFS_MAXPATHLEN-len; 463 len = NFS_MAXPATHLEN; 464 } else 465 len += mp->m_len; 466 ivp->iov_base = mtod(mp, caddr_t); 467 ivp->iov_len = mp->m_len; 468 i++; 469 ivp++; 470 } 471 uiop->uio_iov = iv; 472 uiop->uio_iovcnt = i; 473 uiop->uio_offset = 0; 474 uiop->uio_resid = len; 475 uiop->uio_rw = UIO_READ; 476 uiop->uio_segflg = UIO_SYSSPACE; 477 uiop->uio_procp = (struct proc *)0; 478 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 479 &rdonly, (nfsd->nd_flag & ND_KERBAUTH)); 480 if (error) { 481 m_freem(mp3); 482 nfsm_reply(2 * NFSX_UNSIGNED); 483 nfsm_srvpostop_attr(1, (struct vattr *)0); 484 return (0); 485 } 486 if (vp->v_type != VLNK) { 487 if (v3) 488 error = EINVAL; 489 else 490 error = ENXIO; 491 goto out; 492 } 493 nqsrv_getl(vp, ND_READ); 494 error = VOP_READLINK(vp, uiop, cred); 495 out: 496 getret = VOP_GETATTR(vp, &attr, cred, procp); 497 vput(vp); 498 if (error) 499 m_freem(mp3); 500 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_UNSIGNED); 501 if (v3) { 502 nfsm_srvpostop_attr(getret, &attr); 503 if (error) 504 return (0); 505 } 506 if (uiop->uio_resid > 0) { 507 len -= uiop->uio_resid; 508 tlen = nfsm_rndup(len); 509 nfsm_adj(mp3, NFS_MAXPATHLEN-tlen, tlen-len); 510 } 511 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 512 *tl = txdr_unsigned(len); 513 mb->m_next = mp3; 514 nfsm_srvdone; 515 } 516 517 /* 518 * nfs read service 519 */ 520 int 521 nfsrv_read(nfsd, slp, procp, mrq) 522 struct nfsrv_descript *nfsd; 523 struct nfssvc_sock *slp; 524 struct proc *procp; 525 struct mbuf **mrq; 526 { 527 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 528 struct mbuf *nam = nfsd->nd_nam; 529 caddr_t dpos = nfsd->nd_dpos; 530 struct ucred *cred = &nfsd->nd_cr; 531 register struct iovec *iv; 532 struct iovec *iv2; 533 register struct mbuf *m; 534 register struct nfs_fattr *fp; 535 register u_int32_t *tl; 536 register int32_t t1; 537 register int i; 538 caddr_t bpos; 539 int error = 0, rdonly, cache, cnt, len, left, siz, tlen, getret; 540 int v3 = (nfsd->nd_flag & ND_NFSV3), reqlen; 541 char *cp2; 542 struct mbuf *mb, *mb2, *mreq; 543 struct mbuf *m2; 544 struct vnode *vp; 545 nfsfh_t nfh; 546 fhandle_t *fhp; 547 struct uio io, *uiop = &io; 548 struct vattr va; 549 off_t off; 550 u_quad_t frev; 551 552 fhp = &nfh.fh_generic; 553 nfsm_srvmtofh(fhp); 554 if (v3) { 555 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 556 fxdr_hyper(tl, &off); 557 } else { 558 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 559 off = (off_t)fxdr_unsigned(u_int32_t, *tl); 560 } 561 nfsm_srvstrsiz(reqlen, NFS_SRVMAXDATA(nfsd)); 562 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 563 &rdonly, (nfsd->nd_flag & ND_KERBAUTH)); 564 if (error) { 565 nfsm_reply(2 * NFSX_UNSIGNED); 566 nfsm_srvpostop_attr(1, (struct vattr *)0); 567 return (0); 568 } 569 if (vp->v_type != VREG) { 570 if (v3) 571 error = EINVAL; 572 else 573 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 574 } 575 if (!error) { 576 nqsrv_getl(vp, ND_READ); 577 if ((error = nfsrv_access(vp, VREAD, cred, rdonly, procp, 1)) != 0) 578 error = nfsrv_access(vp, VEXEC, cred, rdonly, procp, 1); 579 } 580 getret = VOP_GETATTR(vp, &va, cred, procp); 581 if (!error) 582 error = getret; 583 if (error) { 584 vput(vp); 585 nfsm_reply(NFSX_POSTOPATTR(v3)); 586 nfsm_srvpostop_attr(getret, &va); 587 return (0); 588 } 589 if (off >= va.va_size) 590 cnt = 0; 591 else if ((off + reqlen) > va.va_size) 592 cnt = nfsm_rndup(va.va_size - off); 593 else 594 cnt = reqlen; 595 nfsm_reply(NFSX_POSTOPORFATTR(v3) + 3 * NFSX_UNSIGNED+nfsm_rndup(cnt)); 596 if (v3) { 597 nfsm_build(tl, u_int32_t *, NFSX_V3FATTR + 4 * NFSX_UNSIGNED); 598 *tl++ = nfs_true; 599 fp = (struct nfs_fattr *)tl; 600 tl += (NFSX_V3FATTR / sizeof (u_int32_t)); 601 } else { 602 nfsm_build(tl, u_int32_t *, NFSX_V2FATTR + NFSX_UNSIGNED); 603 fp = (struct nfs_fattr *)tl; 604 tl += (NFSX_V2FATTR / sizeof (u_int32_t)); 605 } 606 len = left = cnt; 607 if (cnt > 0) { 608 /* 609 * Generate the mbuf list with the uio_iov ref. to it. 610 */ 611 i = 0; 612 m = m2 = mb; 613 while (left > 0) { 614 siz = min(M_TRAILINGSPACE(m), left); 615 if (siz > 0) { 616 left -= siz; 617 i++; 618 } 619 if (left > 0) { 620 MGET(m, M_WAIT, MT_DATA); 621 MCLGET(m, M_WAIT); 622 m->m_len = 0; 623 m2->m_next = m; 624 m2 = m; 625 } 626 } 627 MALLOC(iv, struct iovec *, i * sizeof (struct iovec), 628 M_TEMP, M_WAITOK); 629 uiop->uio_iov = iv2 = iv; 630 m = mb; 631 left = cnt; 632 i = 0; 633 while (left > 0) { 634 if (m == NULL) 635 panic("nfsrv_read iov"); 636 siz = min(M_TRAILINGSPACE(m), left); 637 if (siz > 0) { 638 iv->iov_base = mtod(m, caddr_t) + m->m_len; 639 iv->iov_len = siz; 640 m->m_len += siz; 641 left -= siz; 642 iv++; 643 i++; 644 } 645 m = m->m_next; 646 } 647 uiop->uio_iovcnt = i; 648 uiop->uio_offset = off; 649 uiop->uio_resid = cnt; 650 uiop->uio_rw = UIO_READ; 651 uiop->uio_segflg = UIO_SYSSPACE; 652 error = VOP_READ(vp, uiop, IO_NODELOCKED, cred); 653 off = uiop->uio_offset; 654 FREE((caddr_t)iv2, M_TEMP); 655 if (error || (getret = VOP_GETATTR(vp, &va, cred, procp)) != 0){ 656 if (!error) 657 error = getret; 658 m_freem(mreq); 659 vput(vp); 660 nfsm_reply(NFSX_POSTOPATTR(v3)); 661 nfsm_srvpostop_attr(getret, &va); 662 return (0); 663 } 664 } else 665 uiop->uio_resid = 0; 666 vput(vp); 667 nfsm_srvfillattr(&va, fp); 668 len -= uiop->uio_resid; 669 tlen = nfsm_rndup(len); 670 if (cnt != tlen || tlen != len) 671 nfsm_adj(mb, cnt - tlen, tlen - len); 672 if (v3) { 673 *tl++ = txdr_unsigned(len); 674 if (len < reqlen) 675 *tl++ = nfs_true; 676 else 677 *tl++ = nfs_false; 678 } 679 *tl = txdr_unsigned(len); 680 nfsm_srvdone; 681 } 682 683 /* 684 * nfs write service 685 */ 686 int 687 nfsrv_write(nfsd, slp, procp, mrq) 688 struct nfsrv_descript *nfsd; 689 struct nfssvc_sock *slp; 690 struct proc *procp; 691 struct mbuf **mrq; 692 { 693 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 694 struct mbuf *nam = nfsd->nd_nam; 695 caddr_t dpos = nfsd->nd_dpos; 696 struct ucred *cred = &nfsd->nd_cr; 697 register struct iovec *ivp; 698 register int i, cnt; 699 register struct mbuf *mp; 700 register struct nfs_fattr *fp; 701 struct iovec *iv; 702 struct vattr va, forat; 703 register u_int32_t *tl; 704 register int32_t t1; 705 caddr_t bpos; 706 int error = 0, rdonly, cache, len, forat_ret = 1; 707 int ioflags, aftat_ret = 1, retlen, zeroing, adjust; 708 int stable = NFSV3WRITE_FILESYNC; 709 int v3 = (nfsd->nd_flag & ND_NFSV3); 710 char *cp2; 711 struct mbuf *mb, *mb2, *mreq; 712 struct vnode *vp; 713 nfsfh_t nfh; 714 fhandle_t *fhp; 715 struct uio io, *uiop = &io; 716 off_t off; 717 u_quad_t frev; 718 719 if (mrep == NULL) { 720 *mrq = NULL; 721 return (0); 722 } 723 fhp = &nfh.fh_generic; 724 nfsm_srvmtofh(fhp); 725 if (v3) { 726 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 727 fxdr_hyper(tl, &off); 728 tl += 3; 729 stable = fxdr_unsigned(int, *tl++); 730 } else { 731 nfsm_dissect(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 732 off = (off_t)fxdr_unsigned(u_int32_t, *++tl); 733 tl += 2; 734 } 735 retlen = len = fxdr_unsigned(int32_t, *tl); 736 cnt = i = 0; 737 738 /* 739 * For NFS Version 2, it is not obvious what a write of zero length 740 * should do, but I might as well be consistent with Version 3, 741 * which is to return ok so long as there are no permission problems. 742 */ 743 if (len > 0) { 744 zeroing = 1; 745 mp = mrep; 746 while (mp) { 747 if (mp == md) { 748 zeroing = 0; 749 adjust = dpos - mtod(mp, caddr_t); 750 mp->m_len -= adjust; 751 if (mp->m_len > 0 && adjust > 0) 752 NFSMADV(mp, adjust); 753 } 754 if (zeroing) 755 mp->m_len = 0; 756 else if (mp->m_len > 0) { 757 i += mp->m_len; 758 if (i > len) { 759 mp->m_len -= (i - len); 760 zeroing = 1; 761 } 762 if (mp->m_len > 0) 763 cnt++; 764 } 765 mp = mp->m_next; 766 } 767 } 768 if (len > NFS_MAXDATA || len < 0 || i < len) { 769 error = EIO; 770 nfsm_reply(2 * NFSX_UNSIGNED); 771 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 772 return (0); 773 } 774 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 775 &rdonly, (nfsd->nd_flag & ND_KERBAUTH)); 776 if (error) { 777 nfsm_reply(2 * NFSX_UNSIGNED); 778 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 779 return (0); 780 } 781 if (v3) 782 forat_ret = VOP_GETATTR(vp, &forat, cred, procp); 783 if (vp->v_type != VREG) { 784 if (v3) 785 error = EINVAL; 786 else 787 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 788 } 789 if (!error) { 790 nqsrv_getl(vp, ND_WRITE); 791 error = nfsrv_access(vp, VWRITE, cred, rdonly, procp, 1); 792 } 793 if (error) { 794 vput(vp); 795 nfsm_reply(NFSX_WCCDATA(v3)); 796 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 797 return (0); 798 } 799 800 if (len > 0) { 801 MALLOC(ivp, struct iovec *, cnt * sizeof (struct iovec), M_TEMP, 802 M_WAITOK); 803 uiop->uio_iov = iv = ivp; 804 uiop->uio_iovcnt = cnt; 805 mp = mrep; 806 while (mp) { 807 if (mp->m_len > 0) { 808 ivp->iov_base = mtod(mp, caddr_t); 809 ivp->iov_len = mp->m_len; 810 ivp++; 811 } 812 mp = mp->m_next; 813 } 814 815 /* 816 * XXX 817 * The IO_METASYNC flag indicates that all metadata (and not just 818 * enough to ensure data integrity) mus be written to stable storage 819 * synchronously. 820 * (IO_METASYNC is not yet implemented in 4.4BSD-Lite.) 821 */ 822 if (stable == NFSV3WRITE_UNSTABLE) 823 ioflags = IO_NODELOCKED; 824 else if (stable == NFSV3WRITE_DATASYNC) 825 ioflags = (IO_SYNC | IO_NODELOCKED); 826 else 827 ioflags = (IO_METASYNC | IO_SYNC | IO_NODELOCKED); 828 uiop->uio_resid = len; 829 uiop->uio_rw = UIO_WRITE; 830 uiop->uio_segflg = UIO_SYSSPACE; 831 uiop->uio_procp = (struct proc *)0; 832 uiop->uio_offset = off; 833 error = VOP_WRITE(vp, uiop, ioflags, cred); 834 nfsstats.srvvop_writes++; 835 FREE((caddr_t)iv, M_TEMP); 836 } 837 aftat_ret = VOP_GETATTR(vp, &va, cred, procp); 838 vput(vp); 839 if (!error) 840 error = aftat_ret; 841 nfsm_reply(NFSX_PREOPATTR(v3) + NFSX_POSTOPORFATTR(v3) + 842 2 * NFSX_UNSIGNED + NFSX_WRITEVERF(v3)); 843 if (v3) { 844 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 845 if (error) 846 return (0); 847 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 848 *tl++ = txdr_unsigned(retlen); 849 if (stable == NFSV3WRITE_UNSTABLE) 850 *tl++ = txdr_unsigned(stable); 851 else 852 *tl++ = txdr_unsigned(NFSV3WRITE_FILESYNC); 853 /* 854 * Actually, there is no need to txdr these fields, 855 * but it may make the values more human readable, 856 * for debugging purposes. 857 */ 858 *tl++ = txdr_unsigned(boottime.tv_sec); 859 *tl = txdr_unsigned(boottime.tv_usec); 860 } else { 861 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 862 nfsm_srvfillattr(&va, fp); 863 } 864 nfsm_srvdone; 865 } 866 867 /* 868 * NFS write service with write gathering support. Called when 869 * nfsrvw_procrastinate > 0. 870 * See: Chet Juszczak, "Improving the Write Performance of an NFS Server", 871 * in Proc. of the Winter 1994 Usenix Conference, pg. 247-259, San Franscisco, 872 * Jan. 1994. 873 */ 874 int 875 nfsrv_writegather(ndp, slp, procp, mrq) 876 struct nfsrv_descript **ndp; 877 struct nfssvc_sock *slp; 878 struct proc *procp; 879 struct mbuf **mrq; 880 { 881 register struct iovec *ivp; 882 register struct mbuf *mp; 883 register struct nfsrv_descript *wp, *nfsd, *owp, *swp; 884 register struct nfs_fattr *fp; 885 register int i = 0; 886 struct iovec *iov; 887 struct nfsrvw_delayhash *wpp; 888 struct ucred *cred; 889 struct vattr va, forat; 890 register u_int32_t *tl; 891 register int32_t t1; 892 caddr_t bpos, dpos; 893 int error = 0, rdonly, cache, len = 0, forat_ret = 1; 894 int ioflags, aftat_ret = 1, s, adjust, v3, zeroing; 895 char *cp2; 896 struct mbuf *mb, *mb2, *mreq, *mrep, *md; 897 struct vnode *vp; 898 struct uio io, *uiop = &io; 899 u_quad_t frev, cur_usec; 900 901 *mrq = NULL; 902 if (*ndp) { 903 nfsd = *ndp; 904 *ndp = NULL; 905 mrep = nfsd->nd_mrep; 906 md = nfsd->nd_md; 907 dpos = nfsd->nd_dpos; 908 cred = &nfsd->nd_cr; 909 v3 = (nfsd->nd_flag & ND_NFSV3); 910 LIST_INIT(&nfsd->nd_coalesce); 911 nfsd->nd_mreq = NULL; 912 nfsd->nd_stable = NFSV3WRITE_FILESYNC; 913 cur_usec = (u_quad_t)time.tv_sec * 1000000 + (u_quad_t)time.tv_usec; 914 nfsd->nd_time = cur_usec + nfsrvw_procrastinate; 915 916 /* 917 * Now, get the write header.. 918 */ 919 nfsm_srvmtofh(&nfsd->nd_fh); 920 if (v3) { 921 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 922 fxdr_hyper(tl, &nfsd->nd_off); 923 tl += 3; 924 nfsd->nd_stable = fxdr_unsigned(int, *tl++); 925 } else { 926 nfsm_dissect(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 927 nfsd->nd_off = (off_t)fxdr_unsigned(u_int32_t, *++tl); 928 tl += 2; 929 } 930 len = fxdr_unsigned(int32_t, *tl); 931 nfsd->nd_len = len; 932 nfsd->nd_eoff = nfsd->nd_off + len; 933 934 /* 935 * Trim the header out of the mbuf list and trim off any trailing 936 * junk so that the mbuf list has only the write data. 937 */ 938 zeroing = 1; 939 i = 0; 940 mp = mrep; 941 while (mp) { 942 if (mp == md) { 943 zeroing = 0; 944 adjust = dpos - mtod(mp, caddr_t); 945 mp->m_len -= adjust; 946 if (mp->m_len > 0 && adjust > 0) 947 NFSMADV(mp, adjust); 948 } 949 if (zeroing) 950 mp->m_len = 0; 951 else { 952 i += mp->m_len; 953 if (i > len) { 954 mp->m_len -= (i - len); 955 zeroing = 1; 956 } 957 } 958 mp = mp->m_next; 959 } 960 if (len > NFS_MAXDATA || len < 0 || i < len) { 961 nfsmout: 962 m_freem(mrep); 963 error = EIO; 964 nfsm_writereply(2 * NFSX_UNSIGNED, v3); 965 if (v3) 966 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 967 nfsd->nd_mreq = mreq; 968 nfsd->nd_mrep = NULL; 969 nfsd->nd_time = 0; 970 } 971 972 /* 973 * Add this entry to the hash and time queues. 974 */ 975 s = splsoftclock(); 976 owp = NULL; 977 wp = slp->ns_tq.lh_first; 978 while (wp && wp->nd_time < nfsd->nd_time) { 979 owp = wp; 980 wp = wp->nd_tq.le_next; 981 } 982 if (owp) { 983 LIST_INSERT_AFTER(owp, nfsd, nd_tq); 984 } else { 985 LIST_INSERT_HEAD(&slp->ns_tq, nfsd, nd_tq); 986 } 987 if (nfsd->nd_mrep) { 988 wpp = NWDELAYHASH(slp, nfsd->nd_fh.fh_fid.fid_data); 989 owp = NULL; 990 wp = wpp->lh_first; 991 while (wp && 992 bcmp((caddr_t)&nfsd->nd_fh,(caddr_t)&wp->nd_fh,NFSX_V3FH)) { 993 owp = wp; 994 wp = wp->nd_hash.le_next; 995 } 996 while (wp && wp->nd_off < nfsd->nd_off && 997 !bcmp((caddr_t)&nfsd->nd_fh,(caddr_t)&wp->nd_fh,NFSX_V3FH)) { 998 owp = wp; 999 wp = wp->nd_hash.le_next; 1000 } 1001 if (owp) { 1002 LIST_INSERT_AFTER(owp, nfsd, nd_hash); 1003 1004 /* 1005 * Search the hash list for overlapping entries and 1006 * coalesce. 1007 */ 1008 for(; nfsd && NFSW_CONTIG(owp, nfsd); nfsd = wp) { 1009 wp = nfsd->nd_hash.le_next; 1010 if (NFSW_SAMECRED(owp, nfsd)) 1011 nfsrvw_coalesce(owp, nfsd); 1012 } 1013 } else { 1014 LIST_INSERT_HEAD(wpp, nfsd, nd_hash); 1015 } 1016 } 1017 splx(s); 1018 } 1019 1020 /* 1021 * Now, do VOP_WRITE()s for any one(s) that need to be done now 1022 * and generate the associated reply mbuf list(s). 1023 */ 1024 loop1: 1025 cur_usec = (u_quad_t)time.tv_sec * 1000000 + (u_quad_t)time.tv_usec; 1026 s = splsoftclock(); 1027 for (nfsd = slp->ns_tq.lh_first; nfsd; nfsd = owp) { 1028 owp = nfsd->nd_tq.le_next; 1029 if (nfsd->nd_time > cur_usec) 1030 break; 1031 if (nfsd->nd_mreq) 1032 continue; 1033 LIST_REMOVE(nfsd, nd_tq); 1034 LIST_REMOVE(nfsd, nd_hash); 1035 splx(s); 1036 mrep = nfsd->nd_mrep; 1037 nfsd->nd_mrep = NULL; 1038 cred = &nfsd->nd_cr; 1039 v3 = (nfsd->nd_flag & ND_NFSV3); 1040 forat_ret = aftat_ret = 1; 1041 error = nfsrv_fhtovp(&nfsd->nd_fh, 1, &vp, cred, slp, 1042 nfsd->nd_nam, &rdonly, (nfsd->nd_flag & ND_KERBAUTH)); 1043 if (!error) { 1044 if (v3) 1045 forat_ret = VOP_GETATTR(vp, &forat, cred, procp); 1046 if (vp->v_type != VREG) { 1047 if (v3) 1048 error = EINVAL; 1049 else 1050 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 1051 } 1052 } else 1053 vp = NULL; 1054 if (!error) { 1055 nqsrv_getl(vp, ND_WRITE); 1056 error = nfsrv_access(vp, VWRITE, cred, rdonly, procp, 1); 1057 } 1058 1059 if (nfsd->nd_stable == NFSV3WRITE_UNSTABLE) 1060 ioflags = IO_NODELOCKED; 1061 else if (nfsd->nd_stable == NFSV3WRITE_DATASYNC) 1062 ioflags = (IO_SYNC | IO_NODELOCKED); 1063 else 1064 ioflags = (IO_METASYNC | IO_SYNC | IO_NODELOCKED); 1065 uiop->uio_rw = UIO_WRITE; 1066 uiop->uio_segflg = UIO_SYSSPACE; 1067 uiop->uio_procp = (struct proc *)0; 1068 uiop->uio_offset = nfsd->nd_off; 1069 uiop->uio_resid = nfsd->nd_eoff - nfsd->nd_off; 1070 if (uiop->uio_resid > 0) { 1071 mp = mrep; 1072 i = 0; 1073 while (mp) { 1074 if (mp->m_len > 0) 1075 i++; 1076 mp = mp->m_next; 1077 } 1078 uiop->uio_iovcnt = i; 1079 MALLOC(iov, struct iovec *, i * sizeof (struct iovec), 1080 M_TEMP, M_WAITOK); 1081 uiop->uio_iov = ivp = iov; 1082 mp = mrep; 1083 while (mp) { 1084 if (mp->m_len > 0) { 1085 ivp->iov_base = mtod(mp, caddr_t); 1086 ivp->iov_len = mp->m_len; 1087 ivp++; 1088 } 1089 mp = mp->m_next; 1090 } 1091 if (!error) { 1092 error = VOP_WRITE(vp, uiop, ioflags, cred); 1093 nfsstats.srvvop_writes++; 1094 } 1095 FREE((caddr_t)iov, M_TEMP); 1096 } 1097 m_freem(mrep); 1098 if (vp) { 1099 aftat_ret = VOP_GETATTR(vp, &va, cred, procp); 1100 vput(vp); 1101 } 1102 1103 /* 1104 * Loop around generating replies for all write rpcs that have 1105 * now been completed. 1106 */ 1107 swp = nfsd; 1108 do { 1109 if (error) { 1110 nfsm_writereply(NFSX_WCCDATA(v3), v3); 1111 if (v3) { 1112 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1113 } 1114 } else { 1115 nfsm_writereply(NFSX_PREOPATTR(v3) + 1116 NFSX_POSTOPORFATTR(v3) + 2 * NFSX_UNSIGNED + 1117 NFSX_WRITEVERF(v3), v3); 1118 if (v3) { 1119 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1120 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1121 *tl++ = txdr_unsigned(nfsd->nd_len); 1122 *tl++ = txdr_unsigned(swp->nd_stable); 1123 /* 1124 * Actually, there is no need to txdr these fields, 1125 * but it may make the values more human readable, 1126 * for debugging purposes. 1127 */ 1128 *tl++ = txdr_unsigned(boottime.tv_sec); 1129 *tl = txdr_unsigned(boottime.tv_usec); 1130 } else { 1131 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 1132 nfsm_srvfillattr(&va, fp); 1133 } 1134 } 1135 nfsd->nd_mreq = mreq; 1136 if (nfsd->nd_mrep) 1137 panic("nfsrv_write: nd_mrep not free"); 1138 1139 /* 1140 * Done. Put it at the head of the timer queue so that 1141 * the final phase can return the reply. 1142 */ 1143 s = splsoftclock(); 1144 if (nfsd != swp) { 1145 nfsd->nd_time = 0; 1146 LIST_INSERT_HEAD(&slp->ns_tq, nfsd, nd_tq); 1147 } 1148 nfsd = swp->nd_coalesce.lh_first; 1149 if (nfsd) { 1150 LIST_REMOVE(nfsd, nd_tq); 1151 } 1152 splx(s); 1153 } while (nfsd); 1154 s = splsoftclock(); 1155 swp->nd_time = 0; 1156 LIST_INSERT_HEAD(&slp->ns_tq, swp, nd_tq); 1157 splx(s); 1158 goto loop1; 1159 } 1160 splx(s); 1161 1162 /* 1163 * Search for a reply to return. 1164 */ 1165 s = splsoftclock(); 1166 for (nfsd = slp->ns_tq.lh_first; nfsd; nfsd = nfsd->nd_tq.le_next) 1167 if (nfsd->nd_mreq) { 1168 LIST_REMOVE(nfsd, nd_tq); 1169 *mrq = nfsd->nd_mreq; 1170 *ndp = nfsd; 1171 break; 1172 } 1173 splx(s); 1174 return (0); 1175 } 1176 1177 /* 1178 * Coalesce the write request nfsd into owp. To do this we must: 1179 * - remove nfsd from the queues 1180 * - merge nfsd->nd_mrep into owp->nd_mrep 1181 * - update the nd_eoff and nd_stable for owp 1182 * - put nfsd on owp's nd_coalesce list 1183 * NB: Must be called at splsoftclock(). 1184 */ 1185 void 1186 nfsrvw_coalesce(owp, nfsd) 1187 register struct nfsrv_descript *owp; 1188 register struct nfsrv_descript *nfsd; 1189 { 1190 register int overlap; 1191 register struct mbuf *mp; 1192 1193 LIST_REMOVE(nfsd, nd_hash); 1194 LIST_REMOVE(nfsd, nd_tq); 1195 if (owp->nd_eoff < nfsd->nd_eoff) { 1196 overlap = owp->nd_eoff - nfsd->nd_off; 1197 if (overlap < 0) 1198 panic("nfsrv_coalesce: bad off"); 1199 if (overlap > 0) 1200 m_adj(nfsd->nd_mrep, overlap); 1201 mp = owp->nd_mrep; 1202 while (mp->m_next) 1203 mp = mp->m_next; 1204 mp->m_next = nfsd->nd_mrep; 1205 owp->nd_eoff = nfsd->nd_eoff; 1206 } else 1207 m_freem(nfsd->nd_mrep); 1208 nfsd->nd_mrep = NULL; 1209 if (nfsd->nd_stable == NFSV3WRITE_FILESYNC) 1210 owp->nd_stable = NFSV3WRITE_FILESYNC; 1211 else if (nfsd->nd_stable == NFSV3WRITE_DATASYNC && 1212 owp->nd_stable == NFSV3WRITE_UNSTABLE) 1213 owp->nd_stable = NFSV3WRITE_DATASYNC; 1214 LIST_INSERT_HEAD(&owp->nd_coalesce, nfsd, nd_tq); 1215 /* 1216 * nfsd might hold coalesce elements! Move them to owp. 1217 * Otherwise, requests may be lost and clients will be stuck. 1218 */ 1219 if (nfsd->nd_coalesce.lh_first) 1220 { 1221 register struct nfsrv_descript *m; 1222 1223 while ((m = nfsd->nd_coalesce.lh_first)) 1224 { 1225 LIST_REMOVE(m, nd_tq); 1226 LIST_INSERT_HEAD(&owp->nd_coalesce, m, nd_tq); 1227 } 1228 } 1229 } 1230 1231 /* 1232 * nfs create service 1233 * now does a truncate to 0 length via. setattr if it already exists 1234 */ 1235 int 1236 nfsrv_create(nfsd, slp, procp, mrq) 1237 struct nfsrv_descript *nfsd; 1238 struct nfssvc_sock *slp; 1239 struct proc *procp; 1240 struct mbuf **mrq; 1241 { 1242 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1243 struct mbuf *nam = nfsd->nd_nam; 1244 caddr_t dpos = nfsd->nd_dpos; 1245 struct ucred *cred = &nfsd->nd_cr; 1246 register struct nfs_fattr *fp; 1247 struct vattr va, dirfor, diraft; 1248 register struct nfsv2_sattr *sp; 1249 register u_int32_t *tl; 1250 struct nameidata nd; 1251 register caddr_t cp; 1252 register int32_t t1; 1253 caddr_t bpos; 1254 int error = 0, cache, len, tsize, dirfor_ret = 1, diraft_ret = 1; 1255 int rdev = 0; 1256 int v3 = (nfsd->nd_flag & ND_NFSV3), how, exclusive_flag = 0; 1257 char *cp2; 1258 struct mbuf *mb, *mb2, *mreq; 1259 struct vnode *vp = NULL, *dirp = NULL; 1260 nfsfh_t nfh; 1261 fhandle_t *fhp; 1262 u_quad_t frev, tempsize; 1263 u_char cverf[NFSX_V3CREATEVERF]; 1264 1265 nd.ni_cnd.cn_nameiop = 0; 1266 fhp = &nfh.fh_generic; 1267 nfsm_srvmtofh(fhp); 1268 nfsm_srvnamesiz(len); 1269 nd.ni_cnd.cn_cred = cred; 1270 nd.ni_cnd.cn_nameiop = CREATE; 1271 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF | SAVESTART; 1272 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 1273 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH)); 1274 if (dirp) { 1275 if (v3) 1276 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 1277 procp); 1278 else { 1279 vrele(dirp); 1280 dirp = (struct vnode *)0; 1281 } 1282 } 1283 if (error) { 1284 nfsm_reply(NFSX_WCCDATA(v3)); 1285 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1286 if (dirp) 1287 vrele(dirp); 1288 return (0); 1289 } 1290 VATTR_NULL(&va); 1291 if (v3) { 1292 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1293 how = fxdr_unsigned(int, *tl); 1294 switch (how) { 1295 case NFSV3CREATE_GUARDED: 1296 if (nd.ni_vp) { 1297 error = EEXIST; 1298 break; 1299 } 1300 case NFSV3CREATE_UNCHECKED: 1301 nfsm_srvsattr(&va); 1302 break; 1303 case NFSV3CREATE_EXCLUSIVE: 1304 nfsm_dissect(cp, caddr_t, NFSX_V3CREATEVERF); 1305 bcopy(cp, cverf, NFSX_V3CREATEVERF); 1306 exclusive_flag = 1; 1307 if (nd.ni_vp == NULL) 1308 va.va_mode = 0; 1309 break; 1310 }; 1311 va.va_type = VREG; 1312 } else { 1313 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1314 va.va_type = IFTOVT(fxdr_unsigned(u_int32_t, sp->sa_mode)); 1315 if (va.va_type == VNON) 1316 va.va_type = VREG; 1317 va.va_mode = nfstov_mode(sp->sa_mode); 1318 switch (va.va_type) { 1319 case VREG: 1320 tsize = fxdr_unsigned(int32_t, sp->sa_size); 1321 if (tsize != -1) 1322 va.va_size = (u_quad_t)tsize; 1323 break; 1324 case VCHR: 1325 case VBLK: 1326 case VFIFO: 1327 rdev = fxdr_unsigned(int32_t, sp->sa_size); 1328 break; 1329 default: 1330 break; 1331 }; 1332 } 1333 1334 /* 1335 * Iff doesn't exist, create it 1336 * otherwise just truncate to 0 length 1337 * should I set the mode too ?? 1338 */ 1339 if (nd.ni_vp == NULL) { 1340 if (va.va_type == VREG || va.va_type == VSOCK) { 1341 vrele(nd.ni_startdir); 1342 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1343 error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1344 if (!error) { 1345 FREE(nd.ni_cnd.cn_pnbuf, M_NAMEI); 1346 if (exclusive_flag) { 1347 exclusive_flag = 0; 1348 VATTR_NULL(&va); 1349 bcopy(cverf, (caddr_t)&va.va_atime, 1350 NFSX_V3CREATEVERF); 1351 error = VOP_SETATTR(nd.ni_vp, &va, cred, 1352 procp); 1353 } 1354 } 1355 } else if (va.va_type == VCHR || va.va_type == VBLK || 1356 va.va_type == VFIFO) { 1357 if (va.va_type == VCHR && rdev == 0xffffffff) 1358 va.va_type = VFIFO; 1359 error = suser(cred, (u_short *)0); 1360 if (error) { 1361 vrele(nd.ni_startdir); 1362 free(nd.ni_cnd.cn_pnbuf, M_NAMEI); 1363 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1364 vput(nd.ni_dvp); 1365 nfsm_reply(0); 1366 return (error); 1367 } else 1368 va.va_rdev = (dev_t)rdev; 1369 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1370 error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, 1371 &va); 1372 if (error) { 1373 vrele(nd.ni_startdir); 1374 nfsm_reply(0); 1375 } 1376 nd.ni_cnd.cn_nameiop = LOOKUP; 1377 nd.ni_cnd.cn_flags &= ~(LOCKPARENT | SAVESTART); 1378 nd.ni_cnd.cn_proc = procp; 1379 nd.ni_cnd.cn_cred = cred; 1380 if ((error = lookup(&nd)) != 0) { 1381 free(nd.ni_cnd.cn_pnbuf, M_NAMEI); 1382 nfsm_reply(0); 1383 } 1384 FREE(nd.ni_cnd.cn_pnbuf, M_NAMEI); 1385 if (nd.ni_cnd.cn_flags & ISSYMLINK) { 1386 vrele(nd.ni_dvp); 1387 vput(nd.ni_vp); 1388 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1389 error = EINVAL; 1390 nfsm_reply(0); 1391 } 1392 } else { 1393 vrele(nd.ni_startdir); 1394 free(nd.ni_cnd.cn_pnbuf, M_NAMEI); 1395 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1396 vput(nd.ni_dvp); 1397 error = ENXIO; 1398 } 1399 vp = nd.ni_vp; 1400 } else { 1401 vrele(nd.ni_startdir); 1402 free(nd.ni_cnd.cn_pnbuf, M_NAMEI); 1403 vp = nd.ni_vp; 1404 if (nd.ni_dvp == vp) 1405 vrele(nd.ni_dvp); 1406 else 1407 vput(nd.ni_dvp); 1408 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1409 if (va.va_size != -1) { 1410 error = nfsrv_access(vp, VWRITE, cred, 1411 (nd.ni_cnd.cn_flags & RDONLY), procp, 0); 1412 if (!error) { 1413 nqsrv_getl(vp, ND_WRITE); 1414 tempsize = va.va_size; 1415 VATTR_NULL(&va); 1416 va.va_size = tempsize; 1417 error = VOP_SETATTR(vp, &va, cred, 1418 procp); 1419 } 1420 if (error) 1421 vput(vp); 1422 } 1423 } 1424 if (!error) { 1425 bzero((caddr_t)fhp, sizeof(nfh)); 1426 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; 1427 error = VFS_VPTOFH(vp, &fhp->fh_fid); 1428 if (!error) 1429 error = VOP_GETATTR(vp, &va, cred, procp); 1430 vput(vp); 1431 } 1432 if (v3) { 1433 if (exclusive_flag && !error && 1434 bcmp(cverf, (caddr_t)&va.va_atime, NFSX_V3CREATEVERF)) 1435 error = EEXIST; 1436 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 1437 vrele(dirp); 1438 } 1439 nfsm_reply(NFSX_SRVFH(v3) + NFSX_FATTR(v3) + NFSX_WCCDATA(v3)); 1440 if (v3) { 1441 if (!error) { 1442 nfsm_srvpostop_fh(fhp); 1443 nfsm_srvpostop_attr(0, &va); 1444 } 1445 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1446 } else { 1447 nfsm_srvfhtom(fhp, v3); 1448 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 1449 nfsm_srvfillattr(&va, fp); 1450 } 1451 return (0); 1452 nfsmout: 1453 if (dirp) 1454 vrele(dirp); 1455 if (nd.ni_cnd.cn_nameiop) { 1456 vrele(nd.ni_startdir); 1457 free((caddr_t)nd.ni_cnd.cn_pnbuf, M_NAMEI); 1458 } 1459 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1460 if (nd.ni_dvp == nd.ni_vp) 1461 vrele(nd.ni_dvp); 1462 else 1463 vput(nd.ni_dvp); 1464 if (nd.ni_vp) 1465 vput(nd.ni_vp); 1466 return (error); 1467 } 1468 1469 /* 1470 * nfs v3 mknod service 1471 */ 1472 int 1473 nfsrv_mknod(nfsd, slp, procp, mrq) 1474 struct nfsrv_descript *nfsd; 1475 struct nfssvc_sock *slp; 1476 struct proc *procp; 1477 struct mbuf **mrq; 1478 { 1479 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1480 struct mbuf *nam = nfsd->nd_nam; 1481 caddr_t dpos = nfsd->nd_dpos; 1482 struct ucred *cred = &nfsd->nd_cr; 1483 struct vattr va, dirfor, diraft; 1484 register u_int32_t *tl; 1485 struct nameidata nd; 1486 register int32_t t1; 1487 caddr_t bpos; 1488 int error = 0, cache, len, dirfor_ret = 1, diraft_ret = 1; 1489 u_int32_t major, minor; 1490 enum vtype vtyp; 1491 char *cp2; 1492 struct mbuf *mb, *mb2, *mreq; 1493 struct vnode *vp, *dirp = (struct vnode *)0; 1494 nfsfh_t nfh; 1495 fhandle_t *fhp; 1496 u_quad_t frev; 1497 1498 nd.ni_cnd.cn_nameiop = 0; 1499 fhp = &nfh.fh_generic; 1500 nfsm_srvmtofh(fhp); 1501 nfsm_srvnamesiz(len); 1502 nd.ni_cnd.cn_cred = cred; 1503 nd.ni_cnd.cn_nameiop = CREATE; 1504 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF | SAVESTART; 1505 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 1506 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH)); 1507 if (dirp) 1508 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, procp); 1509 if (error) { 1510 nfsm_reply(NFSX_WCCDATA(1)); 1511 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1512 if (dirp) 1513 vrele(dirp); 1514 return (0); 1515 } 1516 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1517 vtyp = nfsv3tov_type(*tl); 1518 if (vtyp != VCHR && vtyp != VBLK && vtyp != VSOCK && vtyp != VFIFO) { 1519 vrele(nd.ni_startdir); 1520 free((caddr_t)nd.ni_cnd.cn_pnbuf, M_NAMEI); 1521 error = NFSERR_BADTYPE; 1522 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1523 vput(nd.ni_dvp); 1524 goto out; 1525 } 1526 VATTR_NULL(&va); 1527 nfsm_srvsattr(&va); 1528 if (vtyp == VCHR || vtyp == VBLK) { 1529 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1530 major = fxdr_unsigned(u_int32_t, *tl++); 1531 minor = fxdr_unsigned(u_int32_t, *tl); 1532 va.va_rdev = makedev(major, minor); 1533 } 1534 1535 /* 1536 * Iff doesn't exist, create it. 1537 */ 1538 if (nd.ni_vp) { 1539 vrele(nd.ni_startdir); 1540 free((caddr_t)nd.ni_cnd.cn_pnbuf, M_NAMEI); 1541 error = EEXIST; 1542 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1543 vput(nd.ni_dvp); 1544 goto out; 1545 } 1546 va.va_type = vtyp; 1547 if (vtyp == VSOCK) { 1548 vrele(nd.ni_startdir); 1549 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1550 error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1551 if (!error) 1552 FREE(nd.ni_cnd.cn_pnbuf, M_NAMEI); 1553 } else { 1554 error = suser(cred, (u_short *)0); 1555 if (error) { 1556 vrele(nd.ni_startdir); 1557 free((caddr_t)nd.ni_cnd.cn_pnbuf, M_NAMEI); 1558 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1559 vput(nd.ni_dvp); 1560 goto out; 1561 } 1562 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1563 error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1564 if (error) { 1565 vrele(nd.ni_startdir); 1566 goto out; 1567 } 1568 nd.ni_cnd.cn_nameiop = LOOKUP; 1569 nd.ni_cnd.cn_flags &= ~(LOCKPARENT | SAVESTART); 1570 nd.ni_cnd.cn_proc = procp; 1571 nd.ni_cnd.cn_cred = procp->p_ucred; 1572 error = lookup(&nd); 1573 FREE(nd.ni_cnd.cn_pnbuf, M_NAMEI); 1574 if (error) 1575 goto out; 1576 if (nd.ni_cnd.cn_flags & ISSYMLINK) { 1577 vrele(nd.ni_dvp); 1578 vput(nd.ni_vp); 1579 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1580 error = EINVAL; 1581 } 1582 } 1583 out: 1584 vp = nd.ni_vp; 1585 if (!error) { 1586 bzero((caddr_t)fhp, sizeof(nfh)); 1587 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; 1588 error = VFS_VPTOFH(vp, &fhp->fh_fid); 1589 if (!error) 1590 error = VOP_GETATTR(vp, &va, cred, procp); 1591 vput(vp); 1592 } 1593 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 1594 vrele(dirp); 1595 nfsm_reply(NFSX_SRVFH(1) + NFSX_POSTOPATTR(1) + NFSX_WCCDATA(1)); 1596 if (!error) { 1597 nfsm_srvpostop_fh(fhp); 1598 nfsm_srvpostop_attr(0, &va); 1599 } 1600 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1601 return (0); 1602 nfsmout: 1603 if (dirp) 1604 vrele(dirp); 1605 if (nd.ni_cnd.cn_nameiop) { 1606 vrele(nd.ni_startdir); 1607 free((caddr_t)nd.ni_cnd.cn_pnbuf, M_NAMEI); 1608 } 1609 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1610 if (nd.ni_dvp == nd.ni_vp) 1611 vrele(nd.ni_dvp); 1612 else 1613 vput(nd.ni_dvp); 1614 if (nd.ni_vp) 1615 vput(nd.ni_vp); 1616 return (error); 1617 } 1618 1619 /* 1620 * nfs remove service 1621 */ 1622 int 1623 nfsrv_remove(nfsd, slp, procp, mrq) 1624 struct nfsrv_descript *nfsd; 1625 struct nfssvc_sock *slp; 1626 struct proc *procp; 1627 struct mbuf **mrq; 1628 { 1629 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1630 struct mbuf *nam = nfsd->nd_nam; 1631 caddr_t dpos = nfsd->nd_dpos; 1632 struct ucred *cred = &nfsd->nd_cr; 1633 struct nameidata nd; 1634 register u_int32_t *tl; 1635 register int32_t t1; 1636 caddr_t bpos; 1637 int error = 0, cache, len, dirfor_ret = 1, diraft_ret = 1; 1638 int v3 = (nfsd->nd_flag & ND_NFSV3); 1639 char *cp2; 1640 struct mbuf *mb, *mreq; 1641 struct vnode *vp, *dirp; 1642 struct vattr dirfor, diraft; 1643 nfsfh_t nfh; 1644 fhandle_t *fhp; 1645 u_quad_t frev; 1646 1647 #ifndef nolint 1648 vp = (struct vnode *)0; 1649 #endif 1650 fhp = &nfh.fh_generic; 1651 nfsm_srvmtofh(fhp); 1652 nfsm_srvnamesiz(len); 1653 nd.ni_cnd.cn_cred = cred; 1654 nd.ni_cnd.cn_nameiop = DELETE; 1655 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 1656 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 1657 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH)); 1658 if (dirp) { 1659 if (v3) 1660 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 1661 procp); 1662 else 1663 vrele(dirp); 1664 } 1665 if (!error) { 1666 vp = nd.ni_vp; 1667 if (vp->v_type == VDIR && 1668 (error = suser(cred, (u_short *)0)) != 0) 1669 goto out; 1670 /* 1671 * The root of a mounted filesystem cannot be deleted. 1672 */ 1673 if (vp->v_flag & VROOT) { 1674 error = EBUSY; 1675 goto out; 1676 } 1677 out: 1678 if (!error) { 1679 (void)vnode_pager_uncache(vp); 1680 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1681 nqsrv_getl(vp, ND_WRITE); 1682 error = VOP_REMOVE(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); 1683 } else { 1684 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1685 if (nd.ni_dvp == vp) 1686 vrele(nd.ni_dvp); 1687 else 1688 vput(nd.ni_dvp); 1689 vput(vp); 1690 } 1691 } 1692 if (dirp && v3) { 1693 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 1694 vrele(dirp); 1695 } 1696 nfsm_reply(NFSX_WCCDATA(v3)); 1697 if (v3) { 1698 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1699 return (0); 1700 } 1701 nfsm_srvdone; 1702 } 1703 1704 /* 1705 * nfs rename service 1706 */ 1707 int 1708 nfsrv_rename(nfsd, slp, procp, mrq) 1709 struct nfsrv_descript *nfsd; 1710 struct nfssvc_sock *slp; 1711 struct proc *procp; 1712 struct mbuf **mrq; 1713 { 1714 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1715 struct mbuf *nam = nfsd->nd_nam; 1716 caddr_t dpos = nfsd->nd_dpos; 1717 struct ucred *cred = &nfsd->nd_cr; 1718 register u_int32_t *tl; 1719 register int32_t t1; 1720 caddr_t bpos; 1721 int error = 0, cache, len, len2, fdirfor_ret = 1, fdiraft_ret = 1; 1722 int tdirfor_ret = 1, tdiraft_ret = 1; 1723 int v3 = (nfsd->nd_flag & ND_NFSV3); 1724 char *cp2; 1725 struct mbuf *mb, *mreq; 1726 struct nameidata fromnd, tond; 1727 struct vnode *fvp, *tvp, *tdvp, *fdirp = (struct vnode *)0; 1728 struct vnode *tdirp = (struct vnode *)0; 1729 struct vattr fdirfor, fdiraft, tdirfor, tdiraft; 1730 nfsfh_t fnfh, tnfh; 1731 fhandle_t *ffhp, *tfhp; 1732 u_quad_t frev; 1733 uid_t saved_uid; 1734 1735 #ifndef nolint 1736 fvp = (struct vnode *)0; 1737 #endif 1738 ffhp = &fnfh.fh_generic; 1739 tfhp = &tnfh.fh_generic; 1740 fromnd.ni_cnd.cn_nameiop = 0; 1741 tond.ni_cnd.cn_nameiop = 0; 1742 nfsm_srvmtofh(ffhp); 1743 nfsm_srvnamesiz(len); 1744 /* 1745 * Remember our original uid so that we can reset cr_uid before 1746 * the second nfs_namei() call, in case it is remapped. 1747 */ 1748 saved_uid = cred->cr_uid; 1749 fromnd.ni_cnd.cn_cred = cred; 1750 fromnd.ni_cnd.cn_nameiop = DELETE; 1751 fromnd.ni_cnd.cn_flags = WANTPARENT | SAVESTART; 1752 error = nfs_namei(&fromnd, ffhp, len, slp, nam, &md, 1753 &dpos, &fdirp, procp, (nfsd->nd_flag & ND_KERBAUTH)); 1754 if (fdirp) { 1755 if (v3) 1756 fdirfor_ret = VOP_GETATTR(fdirp, &fdirfor, cred, 1757 procp); 1758 else { 1759 vrele(fdirp); 1760 fdirp = (struct vnode *)0; 1761 } 1762 } 1763 if (error) { 1764 nfsm_reply(2 * NFSX_WCCDATA(v3)); 1765 nfsm_srvwcc_data(fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft); 1766 nfsm_srvwcc_data(tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft); 1767 if (fdirp) 1768 vrele(fdirp); 1769 return (0); 1770 } 1771 fvp = fromnd.ni_vp; 1772 nfsm_srvmtofh(tfhp); 1773 nfsm_strsiz(len2, NFS_MAXNAMLEN); 1774 cred->cr_uid = saved_uid; 1775 tond.ni_cnd.cn_cred = cred; 1776 tond.ni_cnd.cn_nameiop = RENAME; 1777 tond.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF | NOCACHE | SAVESTART; 1778 error = nfs_namei(&tond, tfhp, len2, slp, nam, &md, 1779 &dpos, &tdirp, procp, (nfsd->nd_flag & ND_KERBAUTH)); 1780 if (tdirp) { 1781 if (v3) 1782 tdirfor_ret = VOP_GETATTR(tdirp, &tdirfor, cred, 1783 procp); 1784 else { 1785 vrele(tdirp); 1786 tdirp = (struct vnode *)0; 1787 } 1788 } 1789 if (error) { 1790 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 1791 vrele(fromnd.ni_dvp); 1792 vrele(fvp); 1793 goto out1; 1794 } 1795 tdvp = tond.ni_dvp; 1796 tvp = tond.ni_vp; 1797 if (tvp != NULL) { 1798 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 1799 if (v3) 1800 error = EEXIST; 1801 else 1802 error = EISDIR; 1803 goto out; 1804 } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 1805 if (v3) 1806 error = EEXIST; 1807 else 1808 error = ENOTDIR; 1809 goto out; 1810 } 1811 if (tvp->v_type == VDIR && tvp->v_mountedhere) { 1812 if (v3) 1813 error = EXDEV; 1814 else 1815 error = ENOTEMPTY; 1816 goto out; 1817 } 1818 } 1819 if (fvp->v_type == VDIR && fvp->v_mountedhere) { 1820 if (v3) 1821 error = EXDEV; 1822 else 1823 error = ENOTEMPTY; 1824 goto out; 1825 } 1826 if (fvp->v_mount != tdvp->v_mount) { 1827 if (v3) 1828 error = EXDEV; 1829 else 1830 error = ENOTEMPTY; 1831 goto out; 1832 } 1833 if (fvp == tdvp) 1834 if (v3) 1835 error = EINVAL; 1836 else 1837 error = ENOTEMPTY; 1838 /* 1839 * If source is the same as the destination (that is the 1840 * same vnode with the same name in the same directory), 1841 * then there is nothing to do. 1842 */ 1843 if (fvp == tvp && fromnd.ni_dvp == tdvp && 1844 fromnd.ni_cnd.cn_namelen == tond.ni_cnd.cn_namelen && 1845 !bcmp(fromnd.ni_cnd.cn_nameptr, tond.ni_cnd.cn_nameptr, 1846 fromnd.ni_cnd.cn_namelen)) 1847 error = -1; 1848 out: 1849 if (!error) { 1850 nqsrv_getl(fromnd.ni_dvp, ND_WRITE); 1851 nqsrv_getl(tdvp, ND_WRITE); 1852 if (tvp) { 1853 (void)vnode_pager_uncache(tvp); 1854 nqsrv_getl(tvp, ND_WRITE); 1855 } 1856 error = VOP_RENAME(fromnd.ni_dvp, fromnd.ni_vp, &fromnd.ni_cnd, 1857 tond.ni_dvp, tond.ni_vp, &tond.ni_cnd); 1858 } else { 1859 VOP_ABORTOP(tond.ni_dvp, &tond.ni_cnd); 1860 if (tdvp == tvp) 1861 vrele(tdvp); 1862 else 1863 vput(tdvp); 1864 if (tvp) 1865 vput(tvp); 1866 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 1867 vrele(fromnd.ni_dvp); 1868 vrele(fvp); 1869 if (error == -1) 1870 error = 0; 1871 } 1872 vrele(tond.ni_startdir); 1873 FREE(tond.ni_cnd.cn_pnbuf, M_NAMEI); 1874 out1: 1875 if (fdirp) { 1876 fdiraft_ret = VOP_GETATTR(fdirp, &fdiraft, cred, procp); 1877 vrele(fdirp); 1878 } 1879 if (tdirp) { 1880 tdiraft_ret = VOP_GETATTR(tdirp, &tdiraft, cred, procp); 1881 vrele(tdirp); 1882 } 1883 vrele(fromnd.ni_startdir); 1884 FREE(fromnd.ni_cnd.cn_pnbuf, M_NAMEI); 1885 nfsm_reply(2 * NFSX_WCCDATA(v3)); 1886 if (v3) { 1887 nfsm_srvwcc_data(fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft); 1888 nfsm_srvwcc_data(tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft); 1889 } 1890 return (0); 1891 1892 nfsmout: 1893 if (fdirp) 1894 vrele(fdirp); 1895 if (tdirp) 1896 vrele(tdirp); 1897 if (tond.ni_cnd.cn_nameiop) { 1898 vrele(tond.ni_startdir); 1899 FREE(tond.ni_cnd.cn_pnbuf, M_NAMEI); 1900 } 1901 if (fromnd.ni_cnd.cn_nameiop) { 1902 vrele(fromnd.ni_startdir); 1903 FREE(fromnd.ni_cnd.cn_pnbuf, M_NAMEI); 1904 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 1905 vrele(fromnd.ni_dvp); 1906 vrele(fvp); 1907 } 1908 return (error); 1909 } 1910 1911 /* 1912 * nfs link service 1913 */ 1914 int 1915 nfsrv_link(nfsd, slp, procp, mrq) 1916 struct nfsrv_descript *nfsd; 1917 struct nfssvc_sock *slp; 1918 struct proc *procp; 1919 struct mbuf **mrq; 1920 { 1921 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1922 struct mbuf *nam = nfsd->nd_nam; 1923 caddr_t dpos = nfsd->nd_dpos; 1924 struct ucred *cred = &nfsd->nd_cr; 1925 struct nameidata nd; 1926 register u_int32_t *tl; 1927 register int32_t t1; 1928 caddr_t bpos; 1929 int error = 0, rdonly, cache, len, dirfor_ret = 1, diraft_ret = 1; 1930 int getret = 1, v3 = (nfsd->nd_flag & ND_NFSV3); 1931 char *cp2; 1932 struct mbuf *mb, *mreq; 1933 struct vnode *vp, *xp, *dirp = (struct vnode *)0; 1934 struct vattr dirfor, diraft, at; 1935 nfsfh_t nfh, dnfh; 1936 fhandle_t *fhp, *dfhp; 1937 u_quad_t frev; 1938 1939 fhp = &nfh.fh_generic; 1940 dfhp = &dnfh.fh_generic; 1941 nfsm_srvmtofh(fhp); 1942 nfsm_srvmtofh(dfhp); 1943 nfsm_srvnamesiz(len); 1944 error = nfsrv_fhtovp(fhp, FALSE, &vp, cred, slp, nam, 1945 &rdonly, (nfsd->nd_flag & ND_KERBAUTH)); 1946 if (error) { 1947 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 1948 nfsm_srvpostop_attr(getret, &at); 1949 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1950 return (0); 1951 } 1952 if (vp->v_type == VDIR && (error = suser(cred, (u_short *)0)) != 0) 1953 goto out1; 1954 nd.ni_cnd.cn_cred = cred; 1955 nd.ni_cnd.cn_nameiop = CREATE; 1956 nd.ni_cnd.cn_flags = LOCKPARENT; 1957 error = nfs_namei(&nd, dfhp, len, slp, nam, &md, &dpos, 1958 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH)); 1959 if (dirp) { 1960 if (v3) 1961 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 1962 procp); 1963 else { 1964 vrele(dirp); 1965 dirp = (struct vnode *)0; 1966 } 1967 } 1968 if (error) 1969 goto out1; 1970 xp = nd.ni_vp; 1971 if (xp != NULL) { 1972 error = EEXIST; 1973 goto out; 1974 } 1975 xp = nd.ni_dvp; 1976 if (vp->v_mount != xp->v_mount) 1977 error = EXDEV; 1978 out: 1979 if (!error) { 1980 nqsrv_getl(vp, ND_WRITE); 1981 nqsrv_getl(xp, ND_WRITE); 1982 error = VOP_LINK(nd.ni_dvp, vp, &nd.ni_cnd); 1983 } else { 1984 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1985 if (nd.ni_dvp == nd.ni_vp) 1986 vrele(nd.ni_dvp); 1987 else 1988 vput(nd.ni_dvp); 1989 if (nd.ni_vp) 1990 vrele(nd.ni_vp); 1991 } 1992 out1: 1993 if (v3) 1994 getret = VOP_GETATTR(vp, &at, cred, procp); 1995 if (dirp) { 1996 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 1997 vrele(dirp); 1998 } 1999 vrele(vp); 2000 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2001 if (v3) { 2002 nfsm_srvpostop_attr(getret, &at); 2003 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2004 return (0); 2005 } 2006 nfsm_srvdone; 2007 } 2008 2009 /* 2010 * nfs symbolic link service 2011 */ 2012 int 2013 nfsrv_symlink(nfsd, slp, procp, mrq) 2014 struct nfsrv_descript *nfsd; 2015 struct nfssvc_sock *slp; 2016 struct proc *procp; 2017 struct mbuf **mrq; 2018 { 2019 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2020 struct mbuf *nam = nfsd->nd_nam; 2021 caddr_t dpos = nfsd->nd_dpos; 2022 struct ucred *cred = &nfsd->nd_cr; 2023 struct vattr va, dirfor, diraft; 2024 struct nameidata nd; 2025 register u_int32_t *tl; 2026 register int32_t t1; 2027 struct nfsv2_sattr *sp; 2028 char *bpos, *pathcp = NULL, *cp2; 2029 struct uio io; 2030 struct iovec iv; 2031 int error = 0, cache, len, len2, dirfor_ret = 1, diraft_ret = 1; 2032 int v3 = (nfsd->nd_flag & ND_NFSV3); 2033 struct mbuf *mb, *mreq, *mb2; 2034 struct vnode *dirp = (struct vnode *)0; 2035 nfsfh_t nfh; 2036 fhandle_t *fhp; 2037 u_quad_t frev; 2038 2039 nd.ni_cnd.cn_nameiop = 0; 2040 fhp = &nfh.fh_generic; 2041 nfsm_srvmtofh(fhp); 2042 nfsm_srvnamesiz(len); 2043 nd.ni_cnd.cn_cred = cred; 2044 nd.ni_cnd.cn_nameiop = CREATE; 2045 nd.ni_cnd.cn_flags = LOCKPARENT | SAVESTART; 2046 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 2047 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH)); 2048 if (dirp) { 2049 if (v3) 2050 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 2051 procp); 2052 else { 2053 vrele(dirp); 2054 dirp = (struct vnode *)0; 2055 } 2056 } 2057 if (error) 2058 goto out; 2059 VATTR_NULL(&va); 2060 if (v3) 2061 nfsm_srvsattr(&va); 2062 nfsm_strsiz(len2, NFS_MAXPATHLEN); 2063 MALLOC(pathcp, caddr_t, len2 + 1, M_TEMP, M_WAITOK); 2064 iv.iov_base = pathcp; 2065 iv.iov_len = len2; 2066 io.uio_resid = len2; 2067 io.uio_offset = 0; 2068 io.uio_iov = &iv; 2069 io.uio_iovcnt = 1; 2070 io.uio_segflg = UIO_SYSSPACE; 2071 io.uio_rw = UIO_READ; 2072 io.uio_procp = (struct proc *)0; 2073 nfsm_mtouio(&io, len2); 2074 if (!v3) { 2075 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2076 va.va_mode = fxdr_unsigned(u_int16_t, sp->sa_mode); 2077 } 2078 *(pathcp + len2) = '\0'; 2079 if (nd.ni_vp) { 2080 vrele(nd.ni_startdir); 2081 free(nd.ni_cnd.cn_pnbuf, M_NAMEI); 2082 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2083 if (nd.ni_dvp == nd.ni_vp) 2084 vrele(nd.ni_dvp); 2085 else 2086 vput(nd.ni_dvp); 2087 vrele(nd.ni_vp); 2088 error = EEXIST; 2089 goto out; 2090 } 2091 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2092 error = VOP_SYMLINK(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va, pathcp); 2093 if (error) 2094 vrele(nd.ni_startdir); 2095 else { 2096 if (v3) { 2097 nd.ni_cnd.cn_nameiop = LOOKUP; 2098 nd.ni_cnd.cn_flags &= ~(LOCKPARENT | SAVESTART | FOLLOW); 2099 nd.ni_cnd.cn_flags |= (NOFOLLOW | LOCKLEAF); 2100 nd.ni_cnd.cn_proc = procp; 2101 nd.ni_cnd.cn_cred = cred; 2102 error = lookup(&nd); 2103 if (!error) { 2104 bzero((caddr_t)fhp, sizeof(nfh)); 2105 fhp->fh_fsid = nd.ni_vp->v_mount->mnt_stat.f_fsid; 2106 error = VFS_VPTOFH(nd.ni_vp, &fhp->fh_fid); 2107 if (!error) 2108 error = VOP_GETATTR(nd.ni_vp, &va, cred, 2109 procp); 2110 vput(nd.ni_vp); 2111 } 2112 } else 2113 vrele(nd.ni_startdir); 2114 FREE(nd.ni_cnd.cn_pnbuf, M_NAMEI); 2115 } 2116 out: 2117 if (pathcp) 2118 FREE(pathcp, M_TEMP); 2119 if (dirp) { 2120 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 2121 vrele(dirp); 2122 } 2123 nfsm_reply(NFSX_SRVFH(v3) + NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2124 if (v3) { 2125 if (!error) { 2126 nfsm_srvpostop_fh(fhp); 2127 nfsm_srvpostop_attr(0, &va); 2128 } 2129 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2130 } 2131 return (0); 2132 nfsmout: 2133 if (nd.ni_cnd.cn_nameiop) { 2134 vrele(nd.ni_startdir); 2135 free(nd.ni_cnd.cn_pnbuf, M_NAMEI); 2136 } 2137 if (dirp) 2138 vrele(dirp); 2139 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2140 if (nd.ni_dvp == nd.ni_vp) 2141 vrele(nd.ni_dvp); 2142 else 2143 vput(nd.ni_dvp); 2144 if (nd.ni_vp) 2145 vrele(nd.ni_vp); 2146 if (pathcp) 2147 FREE(pathcp, M_TEMP); 2148 return (error); 2149 } 2150 2151 /* 2152 * nfs mkdir service 2153 */ 2154 int 2155 nfsrv_mkdir(nfsd, slp, procp, mrq) 2156 struct nfsrv_descript *nfsd; 2157 struct nfssvc_sock *slp; 2158 struct proc *procp; 2159 struct mbuf **mrq; 2160 { 2161 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2162 struct mbuf *nam = nfsd->nd_nam; 2163 caddr_t dpos = nfsd->nd_dpos; 2164 struct ucred *cred = &nfsd->nd_cr; 2165 struct vattr va, dirfor, diraft; 2166 register struct nfs_fattr *fp; 2167 struct nameidata nd; 2168 register caddr_t cp; 2169 register u_int32_t *tl; 2170 register int32_t t1; 2171 caddr_t bpos; 2172 int error = 0, cache, len, dirfor_ret = 1, diraft_ret = 1; 2173 int v3 = (nfsd->nd_flag & ND_NFSV3); 2174 char *cp2; 2175 struct mbuf *mb, *mb2, *mreq; 2176 struct vnode *vp, *dirp = (struct vnode *)0; 2177 nfsfh_t nfh; 2178 fhandle_t *fhp; 2179 u_quad_t frev; 2180 2181 fhp = &nfh.fh_generic; 2182 nfsm_srvmtofh(fhp); 2183 nfsm_srvnamesiz(len); 2184 nd.ni_cnd.cn_cred = cred; 2185 nd.ni_cnd.cn_nameiop = CREATE; 2186 nd.ni_cnd.cn_flags = LOCKPARENT; 2187 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 2188 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH)); 2189 if (dirp) { 2190 if (v3) 2191 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 2192 procp); 2193 else { 2194 vrele(dirp); 2195 dirp = (struct vnode *)0; 2196 } 2197 } 2198 if (error) { 2199 nfsm_reply(NFSX_WCCDATA(v3)); 2200 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2201 if (dirp) 2202 vrele(dirp); 2203 return (0); 2204 } 2205 VATTR_NULL(&va); 2206 if (v3) { 2207 nfsm_srvsattr(&va); 2208 } else { 2209 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2210 va.va_mode = nfstov_mode(*tl++); 2211 } 2212 va.va_type = VDIR; 2213 vp = nd.ni_vp; 2214 if (vp != NULL) { 2215 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2216 if (nd.ni_dvp == vp) 2217 vrele(nd.ni_dvp); 2218 else 2219 vput(nd.ni_dvp); 2220 vrele(vp); 2221 error = EEXIST; 2222 goto out; 2223 } 2224 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2225 error = VOP_MKDIR(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 2226 if (!error) { 2227 vp = nd.ni_vp; 2228 bzero((caddr_t)fhp, sizeof(nfh)); 2229 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; 2230 error = VFS_VPTOFH(vp, &fhp->fh_fid); 2231 if (!error) 2232 error = VOP_GETATTR(vp, &va, cred, procp); 2233 vput(vp); 2234 } 2235 out: 2236 if (dirp) { 2237 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 2238 vrele(dirp); 2239 } 2240 nfsm_reply(NFSX_SRVFH(v3) + NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2241 if (v3) { 2242 if (!error) { 2243 nfsm_srvpostop_fh(fhp); 2244 nfsm_srvpostop_attr(0, &va); 2245 } 2246 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2247 } else { 2248 nfsm_srvfhtom(fhp, v3); 2249 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 2250 nfsm_srvfillattr(&va, fp); 2251 } 2252 return (0); 2253 nfsmout: 2254 if (dirp) 2255 vrele(dirp); 2256 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2257 if (nd.ni_dvp == nd.ni_vp) 2258 vrele(nd.ni_dvp); 2259 else 2260 vput(nd.ni_dvp); 2261 if (nd.ni_vp) 2262 vrele(nd.ni_vp); 2263 return (error); 2264 } 2265 2266 /* 2267 * nfs rmdir service 2268 */ 2269 int 2270 nfsrv_rmdir(nfsd, slp, procp, mrq) 2271 struct nfsrv_descript *nfsd; 2272 struct nfssvc_sock *slp; 2273 struct proc *procp; 2274 struct mbuf **mrq; 2275 { 2276 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2277 struct mbuf *nam = nfsd->nd_nam; 2278 caddr_t dpos = nfsd->nd_dpos; 2279 struct ucred *cred = &nfsd->nd_cr; 2280 register u_int32_t *tl; 2281 register int32_t t1; 2282 caddr_t bpos; 2283 int error = 0, cache, len, dirfor_ret = 1, diraft_ret = 1; 2284 int v3 = (nfsd->nd_flag & ND_NFSV3); 2285 char *cp2; 2286 struct mbuf *mb, *mreq; 2287 struct vnode *vp, *dirp = (struct vnode *)0; 2288 struct vattr dirfor, diraft; 2289 nfsfh_t nfh; 2290 fhandle_t *fhp; 2291 struct nameidata nd; 2292 u_quad_t frev; 2293 2294 fhp = &nfh.fh_generic; 2295 nfsm_srvmtofh(fhp); 2296 nfsm_srvnamesiz(len); 2297 nd.ni_cnd.cn_cred = cred; 2298 nd.ni_cnd.cn_nameiop = DELETE; 2299 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 2300 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 2301 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH)); 2302 if (dirp) { 2303 if (v3) 2304 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 2305 procp); 2306 else { 2307 vrele(dirp); 2308 dirp = (struct vnode *)0; 2309 } 2310 } 2311 if (error) { 2312 nfsm_reply(NFSX_WCCDATA(v3)); 2313 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2314 if (dirp) 2315 vrele(dirp); 2316 return (0); 2317 } 2318 vp = nd.ni_vp; 2319 if (vp->v_type != VDIR) { 2320 error = ENOTDIR; 2321 goto out; 2322 } 2323 /* 2324 * No rmdir "." please. 2325 */ 2326 if (nd.ni_dvp == vp) { 2327 error = EINVAL; 2328 goto out; 2329 } 2330 /* 2331 * The root of a mounted filesystem cannot be deleted. 2332 */ 2333 if (vp->v_flag & VROOT) 2334 error = EBUSY; 2335 out: 2336 if (!error) { 2337 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2338 nqsrv_getl(vp, ND_WRITE); 2339 error = VOP_RMDIR(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); 2340 } else { 2341 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2342 if (nd.ni_dvp == nd.ni_vp) 2343 vrele(nd.ni_dvp); 2344 else 2345 vput(nd.ni_dvp); 2346 vput(vp); 2347 } 2348 if (dirp) { 2349 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 2350 vrele(dirp); 2351 } 2352 nfsm_reply(NFSX_WCCDATA(v3)); 2353 if (v3) { 2354 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2355 return (0); 2356 } 2357 nfsm_srvdone; 2358 } 2359 2360 /* 2361 * nfs readdir service 2362 * - mallocs what it thinks is enough to read 2363 * count rounded up to a multiple of NFS_DIRBLKSIZ <= NFS_MAXREADDIR 2364 * - calls VOP_READDIR() 2365 * - loops around building the reply 2366 * if the output generated exceeds count break out of loop 2367 * The nfsm_clget macro is used here so that the reply will be packed 2368 * tightly in mbuf clusters. 2369 * - it only knows that it has encountered eof when the VOP_READDIR() 2370 * reads nothing 2371 * - as such one readdir rpc will return eof false although you are there 2372 * and then the next will return eof 2373 * - it trims out records with d_fileno == 0 2374 * this doesn't matter for Unix clients, but they might confuse clients 2375 * for other os'. 2376 * - it trims out records with d_type == DT_WHT 2377 * these cannot be seen through NFS (unless we extend the protocol) 2378 * NB: It is tempting to set eof to true if the VOP_READDIR() reads less 2379 * than requested, but this may not apply to all filesystems. For 2380 * example, client NFS does not { although it is never remote mounted 2381 * anyhow } 2382 * The alternate call nfsrv_readdirplus() does lookups as well. 2383 * PS: The NFS protocol spec. does not clarify what the "count" byte 2384 * argument is a count of.. just name strings and file id's or the 2385 * entire reply rpc or ... 2386 * I tried just file name and id sizes and it confused the Sun client, 2387 * so I am using the full rpc size now. The "paranoia.." comment refers 2388 * to including the status longwords that are not a part of the dir. 2389 * "entry" structures, but are in the rpc. 2390 */ 2391 struct flrep { 2392 nfsuint64 fl_off; 2393 u_int32_t fl_postopok; 2394 u_int32_t fl_fattr[NFSX_V3FATTR / sizeof (u_int32_t)]; 2395 u_int32_t fl_fhok; 2396 u_int32_t fl_fhsize; 2397 u_int32_t fl_nfh[NFSX_V3FH / sizeof (u_int32_t)]; 2398 }; 2399 2400 int 2401 nfsrv_readdir(nfsd, slp, procp, mrq) 2402 struct nfsrv_descript *nfsd; 2403 struct nfssvc_sock *slp; 2404 struct proc *procp; 2405 struct mbuf **mrq; 2406 { 2407 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2408 struct mbuf *nam = nfsd->nd_nam; 2409 caddr_t dpos = nfsd->nd_dpos; 2410 struct ucred *cred = &nfsd->nd_cr; 2411 register char *bp, *be; 2412 register struct mbuf *mp; 2413 register struct dirent *dp; 2414 register caddr_t cp; 2415 register u_int32_t *tl; 2416 register int32_t t1; 2417 caddr_t bpos; 2418 struct mbuf *mb, *mb2, *mreq, *mp2; 2419 char *cpos, *cend, *cp2, *rbuf; 2420 struct vnode *vp; 2421 struct vattr at; 2422 nfsfh_t nfh; 2423 fhandle_t *fhp; 2424 struct uio io; 2425 struct iovec iv; 2426 int len, nlen, rem, xfer, tsiz, i, error = 0, getret = 1; 2427 int siz, cnt, fullsiz, eofflag, rdonly, cache, ncookies; 2428 int v3 = (nfsd->nd_flag & ND_NFSV3); 2429 u_quad_t frev, off, toff, verf; 2430 u_long *cookies = NULL, *cookiep; 2431 2432 fhp = &nfh.fh_generic; 2433 nfsm_srvmtofh(fhp); 2434 if (v3) { 2435 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 2436 fxdr_hyper(tl, &toff); 2437 tl += 2; 2438 fxdr_hyper(tl, &verf); 2439 tl += 2; 2440 } else { 2441 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2442 toff = fxdr_unsigned(u_quad_t, *tl++); 2443 } 2444 off = toff; 2445 cnt = fxdr_unsigned(int, *tl); 2446 siz = ((cnt + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1)); 2447 xfer = NFS_SRVMAXDATA(nfsd); 2448 if (siz > xfer) 2449 siz = xfer; 2450 fullsiz = siz; 2451 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 2452 &rdonly, (nfsd->nd_flag & ND_KERBAUTH)); 2453 if (error) { 2454 nfsm_reply(NFSX_UNSIGNED); 2455 nfsm_srvpostop_attr(getret, &at); 2456 return (0); 2457 } 2458 nqsrv_getl(vp, ND_READ); 2459 if (v3) { 2460 error = getret = VOP_GETATTR(vp, &at, cred, procp); 2461 #ifdef NFS3_STRICTVERF 2462 /* 2463 * XXX This check is too strict for Solaris 2.5 clients. 2464 */ 2465 if (!error && toff && verf != at.va_filerev) 2466 error = NFSERR_BAD_COOKIE; 2467 #endif 2468 } 2469 if (!error) 2470 error = nfsrv_access(vp, VEXEC, cred, rdonly, procp, 0); 2471 if (error) { 2472 vput(vp); 2473 nfsm_reply(NFSX_POSTOPATTR(v3)); 2474 nfsm_srvpostop_attr(getret, &at); 2475 return (0); 2476 } 2477 #ifdef Lite2_integrated 2478 VOP_UNLOCK(vp, 0, procp); 2479 #else 2480 VOP_UNLOCK(vp); 2481 #endif 2482 MALLOC(rbuf, caddr_t, siz, M_TEMP, M_WAITOK); 2483 ncookies = siz / (5 * NFSX_UNSIGNED); /*7 for V3, but it's an est. so*/ 2484 MALLOC(cookies, u_long *, ncookies * sizeof (u_long *), M_TEMP, 2485 M_WAITOK); 2486 again: 2487 iv.iov_base = rbuf; 2488 iv.iov_len = fullsiz; 2489 io.uio_iov = &iv; 2490 io.uio_iovcnt = 1; 2491 io.uio_offset = (off_t)off; 2492 io.uio_resid = fullsiz; 2493 io.uio_segflg = UIO_SYSSPACE; 2494 io.uio_rw = UIO_READ; 2495 io.uio_procp = (struct proc *)0; 2496 eofflag = 0; 2497 #ifdef Lite2_integrated 2498 VOP_LOCK(vp, 0, procp); 2499 #else 2500 VOP_LOCK(vp); 2501 #endif 2502 2503 error = VOP_READDIR(vp, &io, cred, &eofflag, cookies, ncookies); 2504 2505 off = (off_t)io.uio_offset; 2506 if (!cookies && !error) 2507 error = NFSERR_PERM; 2508 if (v3) { 2509 getret = VOP_GETATTR(vp, &at, cred, procp); 2510 if (!error) 2511 error = getret; 2512 } 2513 2514 #ifdef Lite2_integrated 2515 VOP_UNLOCK(vp, 0, procp); 2516 #else 2517 VOP_UNLOCK(vp); 2518 #endif 2519 if (error) { 2520 vrele(vp); 2521 free((caddr_t)rbuf, M_TEMP); 2522 if (cookies) 2523 free((caddr_t)cookies, M_TEMP); 2524 nfsm_reply(NFSX_POSTOPATTR(v3)); 2525 nfsm_srvpostop_attr(getret, &at); 2526 return (0); 2527 } 2528 if (io.uio_resid) { 2529 siz -= io.uio_resid; 2530 2531 /* 2532 * If nothing read, return eof 2533 * rpc reply 2534 */ 2535 if (siz == 0) { 2536 vrele(vp); 2537 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_COOKIEVERF(v3) + 2538 2 * NFSX_UNSIGNED); 2539 if (v3) { 2540 nfsm_srvpostop_attr(getret, &at); 2541 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 2542 txdr_hyper(&at.va_filerev, tl); 2543 tl += 2; 2544 } else 2545 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2546 *tl++ = nfs_false; 2547 *tl = nfs_true; 2548 FREE((caddr_t)rbuf, M_TEMP); 2549 FREE((caddr_t)cookies, M_TEMP); 2550 return (0); 2551 } 2552 } 2553 2554 /* 2555 * Check for degenerate cases of nothing useful read. 2556 * If so go try again 2557 */ 2558 cpos = rbuf; 2559 cend = rbuf + siz; 2560 dp = (struct dirent *)cpos; 2561 cookiep = cookies; 2562 2563 while (cpos < cend && ncookies > 0 && 2564 (dp->d_fileno == 0 || dp->d_type == DT_WHT)) { 2565 cpos += dp->d_reclen; 2566 dp = (struct dirent *)cpos; 2567 cookiep++; 2568 ncookies--; 2569 } 2570 if (cpos >= cend || ncookies == 0) { 2571 toff = off; 2572 siz = fullsiz; 2573 goto again; 2574 } 2575 2576 len = 3 * NFSX_UNSIGNED; /* paranoia, probably can be 0 */ 2577 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_COOKIEVERF(v3) + siz); 2578 if (v3) { 2579 nfsm_srvpostop_attr(getret, &at); 2580 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2581 txdr_hyper(&at.va_filerev, tl); 2582 } 2583 mp = mp2 = mb; 2584 bp = bpos; 2585 be = bp + M_TRAILINGSPACE(mp); 2586 2587 /* Loop through the records and build reply */ 2588 while (cpos < cend && ncookies > 0) { 2589 if (dp->d_fileno != 0 && dp->d_type != DT_WHT) { 2590 nlen = dp->d_namlen; 2591 rem = nfsm_rndup(nlen)-nlen; 2592 len += (4 * NFSX_UNSIGNED + nlen + rem); 2593 if (v3) 2594 len += 2 * NFSX_UNSIGNED; 2595 if (len > cnt) { 2596 eofflag = 0; 2597 break; 2598 } 2599 /* 2600 * Build the directory record xdr from 2601 * the dirent entry. 2602 */ 2603 nfsm_clget; 2604 *tl = nfs_true; 2605 bp += NFSX_UNSIGNED; 2606 if (v3) { 2607 nfsm_clget; 2608 *tl = 0; 2609 bp += NFSX_UNSIGNED; 2610 } 2611 nfsm_clget; 2612 *tl = txdr_unsigned(dp->d_fileno); 2613 bp += NFSX_UNSIGNED; 2614 nfsm_clget; 2615 *tl = txdr_unsigned(nlen); 2616 bp += NFSX_UNSIGNED; 2617 2618 /* And loop around copying the name */ 2619 xfer = nlen; 2620 cp = dp->d_name; 2621 while (xfer > 0) { 2622 nfsm_clget; 2623 if ((bp+xfer) > be) 2624 tsiz = be-bp; 2625 else 2626 tsiz = xfer; 2627 bcopy(cp, bp, tsiz); 2628 bp += tsiz; 2629 xfer -= tsiz; 2630 if (xfer > 0) 2631 cp += tsiz; 2632 } 2633 /* And null pad to an int32_t boundary */ 2634 for (i = 0; i < rem; i++) 2635 *bp++ = '\0'; 2636 nfsm_clget; 2637 2638 /* Finish off the record */ 2639 if (v3) { 2640 *tl = 0; 2641 bp += NFSX_UNSIGNED; 2642 nfsm_clget; 2643 } 2644 *tl = txdr_unsigned(*cookiep); 2645 bp += NFSX_UNSIGNED; 2646 } 2647 cpos += dp->d_reclen; 2648 dp = (struct dirent *)cpos; 2649 cookiep++; 2650 ncookies--; 2651 } 2652 vrele(vp); 2653 nfsm_clget; 2654 *tl = nfs_false; 2655 bp += NFSX_UNSIGNED; 2656 nfsm_clget; 2657 if (eofflag) 2658 *tl = nfs_true; 2659 else 2660 *tl = nfs_false; 2661 bp += NFSX_UNSIGNED; 2662 if (mp != mb) { 2663 if (bp < be) 2664 mp->m_len = bp - mtod(mp, caddr_t); 2665 } else 2666 mp->m_len += bp - bpos; 2667 FREE((caddr_t)rbuf, M_TEMP); 2668 FREE((caddr_t)cookies, M_TEMP); 2669 nfsm_srvdone; 2670 } 2671 2672 int 2673 nfsrv_readdirplus(nfsd, slp, procp, mrq) 2674 struct nfsrv_descript *nfsd; 2675 struct nfssvc_sock *slp; 2676 struct proc *procp; 2677 struct mbuf **mrq; 2678 { 2679 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2680 struct mbuf *nam = nfsd->nd_nam; 2681 caddr_t dpos = nfsd->nd_dpos; 2682 struct ucred *cred = &nfsd->nd_cr; 2683 register char *bp, *be; 2684 register struct mbuf *mp; 2685 register struct dirent *dp; 2686 register caddr_t cp; 2687 register u_int32_t *tl; 2688 register int32_t t1; 2689 caddr_t bpos; 2690 struct mbuf *mb, *mb2, *mreq, *mp2; 2691 char *cpos, *cend, *cp2, *rbuf; 2692 struct vnode *vp, *nvp; 2693 struct flrep fl; 2694 nfsfh_t nfh; 2695 fhandle_t *fhp, *nfhp = (fhandle_t *)fl.fl_nfh; 2696 struct uio io; 2697 struct iovec iv; 2698 struct vattr va, at, *vap = &va; 2699 struct nfs_fattr *fp; 2700 int len, nlen, rem, xfer, tsiz, i, error = 0, getret = 1; 2701 int siz, cnt, fullsiz, eofflag, rdonly, cache, dirlen, ncookies; 2702 u_quad_t frev, off, toff, verf; 2703 u_long *cookies = NULL, *cookiep; 2704 2705 fhp = &nfh.fh_generic; 2706 nfsm_srvmtofh(fhp); 2707 nfsm_dissect(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 2708 fxdr_hyper(tl, &toff); 2709 tl += 2; 2710 fxdr_hyper(tl, &verf); 2711 tl += 2; 2712 siz = fxdr_unsigned(int, *tl++); 2713 cnt = fxdr_unsigned(int, *tl); 2714 off = toff; 2715 siz = ((siz + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1)); 2716 xfer = NFS_SRVMAXDATA(nfsd); 2717 if (siz > xfer) 2718 siz = xfer; 2719 fullsiz = siz; 2720 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 2721 &rdonly, (nfsd->nd_flag & ND_KERBAUTH)); 2722 if (error) { 2723 nfsm_reply(NFSX_UNSIGNED); 2724 nfsm_srvpostop_attr(getret, &at); 2725 return (0); 2726 } 2727 error = getret = VOP_GETATTR(vp, &at, cred, procp); 2728 #ifdef NFS3_STRICTVERF 2729 /* 2730 * XXX This check is too strict for Solaris 2.5 clients. 2731 */ 2732 if (!error && toff && verf != at.va_filerev) 2733 error = NFSERR_BAD_COOKIE; 2734 #endif 2735 if (!error) { 2736 nqsrv_getl(vp, ND_READ); 2737 error = nfsrv_access(vp, VEXEC, cred, rdonly, procp, 0); 2738 } 2739 if (error) { 2740 vput(vp); 2741 nfsm_reply(NFSX_V3POSTOPATTR); 2742 nfsm_srvpostop_attr(getret, &at); 2743 return (0); 2744 } 2745 #ifdef Lite2_integrated 2746 VOP_UNLOCK(vp, 0, procp); 2747 #else 2748 VOP_UNLOCK(vp); 2749 #endif 2750 2751 MALLOC(rbuf, caddr_t, siz, M_TEMP, M_WAITOK); 2752 ncookies = siz / (7 * NFSX_UNSIGNED); 2753 MALLOC(cookies, u_long *, ncookies * sizeof (u_long *), M_TEMP, 2754 M_WAITOK); 2755 again: 2756 iv.iov_base = rbuf; 2757 iv.iov_len = fullsiz; 2758 io.uio_iov = &iv; 2759 io.uio_iovcnt = 1; 2760 io.uio_offset = (off_t)off; 2761 io.uio_resid = fullsiz; 2762 io.uio_segflg = UIO_SYSSPACE; 2763 io.uio_rw = UIO_READ; 2764 io.uio_procp = (struct proc *)0; 2765 eofflag = 0; 2766 2767 #ifdef Lite2_integrated 2768 VOP_LOCK(vp, 0, procp); 2769 #else 2770 VOP_LOCK(vp); 2771 #endif 2772 error = VOP_READDIR(vp, &io, cred, &eofflag, cookies, ncookies); 2773 2774 off = (u_quad_t)io.uio_offset; 2775 getret = VOP_GETATTR(vp, &at, cred, procp); 2776 2777 #ifdef Lite2_integrated 2778 VOP_UNLOCK(vp, 0, procp); 2779 #else 2780 VOP_UNLOCK(vp); 2781 #endif 2782 if (!cookies && !error) 2783 error = NFSERR_PERM; 2784 if (!error) 2785 error = getret; 2786 if (error) { 2787 vrele(vp); 2788 if (cookies) 2789 free((caddr_t)cookies, M_TEMP); 2790 free((caddr_t)rbuf, M_TEMP); 2791 nfsm_reply(NFSX_V3POSTOPATTR); 2792 nfsm_srvpostop_attr(getret, &at); 2793 return (0); 2794 } 2795 if (io.uio_resid) { 2796 siz -= io.uio_resid; 2797 2798 /* 2799 * If nothing read, return eof 2800 * rpc reply 2801 */ 2802 if (siz == 0) { 2803 vrele(vp); 2804 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF + 2805 2 * NFSX_UNSIGNED); 2806 nfsm_srvpostop_attr(getret, &at); 2807 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 2808 txdr_hyper(&at.va_filerev, tl); 2809 tl += 2; 2810 *tl++ = nfs_false; 2811 *tl = nfs_true; 2812 FREE((caddr_t)cookies, M_TEMP); 2813 FREE((caddr_t)rbuf, M_TEMP); 2814 return (0); 2815 } 2816 } 2817 2818 /* 2819 * Check for degenerate cases of nothing useful read. 2820 * If so go try again 2821 */ 2822 cpos = rbuf; 2823 cend = rbuf + siz; 2824 dp = (struct dirent *)cpos; 2825 cookiep = cookies; 2826 2827 while (cpos < cend && ncookies > 0 && 2828 (dp->d_fileno == 0 || dp->d_type == DT_WHT)) { 2829 cpos += dp->d_reclen; 2830 dp = (struct dirent *)cpos; 2831 cookiep++; 2832 ncookies--; 2833 } 2834 if (cpos >= cend || ncookies == 0) { 2835 toff = off; 2836 siz = fullsiz; 2837 goto again; 2838 } 2839 2840 dirlen = len = NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF + 2 * NFSX_UNSIGNED; 2841 nfsm_reply(cnt); 2842 nfsm_srvpostop_attr(getret, &at); 2843 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2844 txdr_hyper(&at.va_filerev, tl); 2845 mp = mp2 = mb; 2846 bp = bpos; 2847 be = bp + M_TRAILINGSPACE(mp); 2848 2849 /* Loop through the records and build reply */ 2850 while (cpos < cend && ncookies > 0) { 2851 if (dp->d_fileno != 0 && dp->d_type != DT_WHT) { 2852 nlen = dp->d_namlen; 2853 rem = nfsm_rndup(nlen)-nlen; 2854 2855 /* 2856 * For readdir_and_lookup get the vnode using 2857 * the file number. 2858 */ 2859 if (VFS_VGET(vp->v_mount, dp->d_fileno, &nvp)) 2860 goto invalid; 2861 bzero((caddr_t)nfhp, NFSX_V3FH); 2862 nfhp->fh_fsid = 2863 nvp->v_mount->mnt_stat.f_fsid; 2864 if (VFS_VPTOFH(nvp, &nfhp->fh_fid)) { 2865 vput(nvp); 2866 goto invalid; 2867 } 2868 if (VOP_GETATTR(nvp, vap, cred, procp)) { 2869 vput(nvp); 2870 goto invalid; 2871 } 2872 vput(nvp); 2873 2874 /* 2875 * If either the dircount or maxcount will be 2876 * exceeded, get out now. Both of these lengths 2877 * are calculated conservatively, including all 2878 * XDR overheads. 2879 */ 2880 len += (7 * NFSX_UNSIGNED + nlen + rem + NFSX_V3FH + 2881 NFSX_V3POSTOPATTR); 2882 dirlen += (6 * NFSX_UNSIGNED + nlen + rem); 2883 if (len > cnt || dirlen > fullsiz) { 2884 eofflag = 0; 2885 break; 2886 } 2887 2888 /* 2889 * Build the directory record xdr from 2890 * the dirent entry. 2891 */ 2892 fp = (struct nfs_fattr *)&fl.fl_fattr; 2893 nfsm_srvfillattr(vap, fp); 2894 fl.fl_fhsize = txdr_unsigned(NFSX_V3FH); 2895 fl.fl_fhok = nfs_true; 2896 fl.fl_postopok = nfs_true; 2897 fl.fl_off.nfsuquad[0] = 0; 2898 fl.fl_off.nfsuquad[1] = txdr_unsigned(*cookiep); 2899 2900 nfsm_clget; 2901 *tl = nfs_true; 2902 bp += NFSX_UNSIGNED; 2903 nfsm_clget; 2904 *tl = 0; 2905 bp += NFSX_UNSIGNED; 2906 nfsm_clget; 2907 *tl = txdr_unsigned(dp->d_fileno); 2908 bp += NFSX_UNSIGNED; 2909 nfsm_clget; 2910 *tl = txdr_unsigned(nlen); 2911 bp += NFSX_UNSIGNED; 2912 2913 /* And loop around copying the name */ 2914 xfer = nlen; 2915 cp = dp->d_name; 2916 while (xfer > 0) { 2917 nfsm_clget; 2918 if ((bp + xfer) > be) 2919 tsiz = be - bp; 2920 else 2921 tsiz = xfer; 2922 bcopy(cp, bp, tsiz); 2923 bp += tsiz; 2924 xfer -= tsiz; 2925 if (xfer > 0) 2926 cp += tsiz; 2927 } 2928 /* And null pad to an int32_t boundary */ 2929 for (i = 0; i < rem; i++) 2930 *bp++ = '\0'; 2931 2932 /* 2933 * Now copy the flrep structure out. 2934 */ 2935 xfer = sizeof (struct flrep); 2936 cp = (caddr_t)&fl; 2937 while (xfer > 0) { 2938 nfsm_clget; 2939 if ((bp + xfer) > be) 2940 tsiz = be - bp; 2941 else 2942 tsiz = xfer; 2943 bcopy(cp, bp, tsiz); 2944 bp += tsiz; 2945 xfer -= tsiz; 2946 if (xfer > 0) 2947 cp += tsiz; 2948 } 2949 } 2950 invalid: 2951 cpos += dp->d_reclen; 2952 dp = (struct dirent *)cpos; 2953 cookiep++; 2954 ncookies--; 2955 } 2956 vrele(vp); 2957 nfsm_clget; 2958 *tl = nfs_false; 2959 bp += NFSX_UNSIGNED; 2960 nfsm_clget; 2961 if (eofflag) 2962 *tl = nfs_true; 2963 else 2964 *tl = nfs_false; 2965 bp += NFSX_UNSIGNED; 2966 if (mp != mb) { 2967 if (bp < be) 2968 mp->m_len = bp - mtod(mp, caddr_t); 2969 } else 2970 mp->m_len += bp - bpos; 2971 FREE((caddr_t)cookies, M_TEMP); 2972 FREE((caddr_t)rbuf, M_TEMP); 2973 nfsm_srvdone; 2974 } 2975 2976 /* 2977 * nfs commit service 2978 */ 2979 int 2980 nfsrv_commit(nfsd, slp, procp, mrq) 2981 struct nfsrv_descript *nfsd; 2982 struct nfssvc_sock *slp; 2983 struct proc *procp; 2984 struct mbuf **mrq; 2985 { 2986 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2987 struct mbuf *nam = nfsd->nd_nam; 2988 caddr_t dpos = nfsd->nd_dpos; 2989 struct ucred *cred = &nfsd->nd_cr; 2990 struct vattr bfor, aft; 2991 struct vnode *vp; 2992 nfsfh_t nfh; 2993 fhandle_t *fhp; 2994 register u_int32_t *tl; 2995 register int32_t t1; 2996 caddr_t bpos; 2997 int error = 0, rdonly, for_ret = 1, aft_ret = 1, cnt, cache; 2998 char *cp2; 2999 struct mbuf *mb, *mb2, *mreq; 3000 u_quad_t frev, off; 3001 3002 #ifndef nolint 3003 cache = 0; 3004 #endif 3005 fhp = &nfh.fh_generic; 3006 nfsm_srvmtofh(fhp); 3007 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 3008 3009 /* 3010 * XXX At this time VOP_FSYNC() does not accept offset and byte 3011 * count parameters, so these arguments are useless (someday maybe). 3012 */ 3013 fxdr_hyper(tl, &off); 3014 tl += 2; 3015 cnt = fxdr_unsigned(int, *tl); 3016 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 3017 &rdonly, (nfsd->nd_flag & ND_KERBAUTH)); 3018 if (error) { 3019 nfsm_reply(2 * NFSX_UNSIGNED); 3020 nfsm_srvwcc_data(for_ret, &bfor, aft_ret, &aft); 3021 return (0); 3022 } 3023 for_ret = VOP_GETATTR(vp, &bfor, cred, procp); 3024 error = VOP_FSYNC(vp, cred, MNT_WAIT, procp); 3025 aft_ret = VOP_GETATTR(vp, &aft, cred, procp); 3026 vput(vp); 3027 nfsm_reply(NFSX_V3WCCDATA + NFSX_V3WRITEVERF); 3028 nfsm_srvwcc_data(for_ret, &bfor, aft_ret, &aft); 3029 if (!error) { 3030 nfsm_build(tl, u_int32_t *, NFSX_V3WRITEVERF); 3031 *tl++ = txdr_unsigned(boottime.tv_sec); 3032 *tl = txdr_unsigned(boottime.tv_usec); 3033 } else 3034 return (0); 3035 nfsm_srvdone; 3036 } 3037 3038 /* 3039 * nfs statfs service 3040 */ 3041 int 3042 nfsrv_statfs(nfsd, slp, procp, mrq) 3043 struct nfsrv_descript *nfsd; 3044 struct nfssvc_sock *slp; 3045 struct proc *procp; 3046 struct mbuf **mrq; 3047 { 3048 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3049 struct mbuf *nam = nfsd->nd_nam; 3050 caddr_t dpos = nfsd->nd_dpos; 3051 struct ucred *cred = &nfsd->nd_cr; 3052 register struct statfs *sf; 3053 register struct nfs_statfs *sfp; 3054 register u_int32_t *tl; 3055 register int32_t t1; 3056 caddr_t bpos; 3057 int error = 0, rdonly, cache, getret = 1; 3058 int v3 = (nfsd->nd_flag & ND_NFSV3); 3059 char *cp2; 3060 struct mbuf *mb, *mb2, *mreq; 3061 struct vnode *vp; 3062 struct vattr at; 3063 nfsfh_t nfh; 3064 fhandle_t *fhp; 3065 struct statfs statfs; 3066 u_quad_t frev, tval; 3067 3068 #ifndef nolint 3069 cache = 0; 3070 #endif 3071 fhp = &nfh.fh_generic; 3072 nfsm_srvmtofh(fhp); 3073 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 3074 &rdonly, (nfsd->nd_flag & ND_KERBAUTH)); 3075 if (error) { 3076 nfsm_reply(NFSX_UNSIGNED); 3077 nfsm_srvpostop_attr(getret, &at); 3078 return (0); 3079 } 3080 sf = &statfs; 3081 error = VFS_STATFS(vp->v_mount, sf, procp); 3082 getret = VOP_GETATTR(vp, &at, cred, procp); 3083 vput(vp); 3084 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_STATFS(v3)); 3085 if (v3) 3086 nfsm_srvpostop_attr(getret, &at); 3087 if (error) 3088 return (0); 3089 nfsm_build(sfp, struct nfs_statfs *, NFSX_STATFS(v3)); 3090 if (v3) { 3091 tval = (u_quad_t)sf->f_blocks; 3092 tval *= (u_quad_t)sf->f_bsize; 3093 txdr_hyper(&tval, &sfp->sf_tbytes); 3094 tval = (u_quad_t)sf->f_bfree; 3095 tval *= (u_quad_t)sf->f_bsize; 3096 txdr_hyper(&tval, &sfp->sf_fbytes); 3097 tval = (u_quad_t)sf->f_bavail; 3098 tval *= (u_quad_t)sf->f_bsize; 3099 txdr_hyper(&tval, &sfp->sf_abytes); 3100 sfp->sf_tfiles.nfsuquad[0] = 0; 3101 sfp->sf_tfiles.nfsuquad[1] = txdr_unsigned(sf->f_files); 3102 sfp->sf_ffiles.nfsuquad[0] = 0; 3103 sfp->sf_ffiles.nfsuquad[1] = txdr_unsigned(sf->f_ffree); 3104 sfp->sf_afiles.nfsuquad[0] = 0; 3105 sfp->sf_afiles.nfsuquad[1] = txdr_unsigned(sf->f_ffree); 3106 sfp->sf_invarsec = 0; 3107 } else { 3108 sfp->sf_tsize = txdr_unsigned(NFS_MAXDGRAMDATA); 3109 sfp->sf_bsize = txdr_unsigned(sf->f_bsize); 3110 sfp->sf_blocks = txdr_unsigned(sf->f_blocks); 3111 sfp->sf_bfree = txdr_unsigned(sf->f_bfree); 3112 sfp->sf_bavail = txdr_unsigned(sf->f_bavail); 3113 } 3114 nfsm_srvdone; 3115 } 3116 3117 /* 3118 * nfs fsinfo service 3119 */ 3120 int 3121 nfsrv_fsinfo(nfsd, slp, procp, mrq) 3122 struct nfsrv_descript *nfsd; 3123 struct nfssvc_sock *slp; 3124 struct proc *procp; 3125 struct mbuf **mrq; 3126 { 3127 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3128 struct mbuf *nam = nfsd->nd_nam; 3129 caddr_t dpos = nfsd->nd_dpos; 3130 struct ucred *cred = &nfsd->nd_cr; 3131 register u_int32_t *tl; 3132 register struct nfsv3_fsinfo *sip; 3133 register int32_t t1; 3134 caddr_t bpos; 3135 int error = 0, rdonly, cache, getret = 1, pref; 3136 char *cp2; 3137 struct mbuf *mb, *mb2, *mreq; 3138 struct vnode *vp; 3139 struct vattr at; 3140 nfsfh_t nfh; 3141 fhandle_t *fhp; 3142 u_quad_t frev; 3143 3144 #ifndef nolint 3145 cache = 0; 3146 #endif 3147 fhp = &nfh.fh_generic; 3148 nfsm_srvmtofh(fhp); 3149 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 3150 &rdonly, (nfsd->nd_flag & ND_KERBAUTH)); 3151 if (error) { 3152 nfsm_reply(NFSX_UNSIGNED); 3153 nfsm_srvpostop_attr(getret, &at); 3154 return (0); 3155 } 3156 getret = VOP_GETATTR(vp, &at, cred, procp); 3157 vput(vp); 3158 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3FSINFO); 3159 nfsm_srvpostop_attr(getret, &at); 3160 nfsm_build(sip, struct nfsv3_fsinfo *, NFSX_V3FSINFO); 3161 3162 /* 3163 * XXX 3164 * There should be file system VFS OP(s) to get this information. 3165 * For now, assume ufs. 3166 */ 3167 if (slp->ns_so->so_type == SOCK_DGRAM) 3168 pref = NFS_MAXDGRAMDATA; 3169 else 3170 pref = NFS_MAXDATA; 3171 sip->fs_rtmax = txdr_unsigned(NFS_MAXDATA); 3172 sip->fs_rtpref = txdr_unsigned(pref); 3173 sip->fs_rtmult = txdr_unsigned(NFS_FABLKSIZE); 3174 sip->fs_wtmax = txdr_unsigned(NFS_MAXDATA); 3175 sip->fs_wtpref = txdr_unsigned(pref); 3176 sip->fs_wtmult = txdr_unsigned(NFS_FABLKSIZE); 3177 sip->fs_dtpref = txdr_unsigned(pref); 3178 sip->fs_maxfilesize.nfsuquad[0] = 0xffffffff; 3179 sip->fs_maxfilesize.nfsuquad[1] = 0xffffffff; 3180 sip->fs_timedelta.nfsv3_sec = 0; 3181 sip->fs_timedelta.nfsv3_nsec = txdr_unsigned(1); 3182 sip->fs_properties = txdr_unsigned(NFSV3FSINFO_LINK | 3183 NFSV3FSINFO_SYMLINK | NFSV3FSINFO_HOMOGENEOUS | 3184 NFSV3FSINFO_CANSETTIME); 3185 nfsm_srvdone; 3186 } 3187 3188 /* 3189 * nfs pathconf service 3190 */ 3191 int 3192 nfsrv_pathconf(nfsd, slp, procp, mrq) 3193 struct nfsrv_descript *nfsd; 3194 struct nfssvc_sock *slp; 3195 struct proc *procp; 3196 struct mbuf **mrq; 3197 { 3198 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3199 struct mbuf *nam = nfsd->nd_nam; 3200 caddr_t dpos = nfsd->nd_dpos; 3201 struct ucred *cred = &nfsd->nd_cr; 3202 register u_int32_t *tl; 3203 register struct nfsv3_pathconf *pc; 3204 register int32_t t1; 3205 caddr_t bpos; 3206 int error = 0, rdonly, cache, getret = 1; 3207 register_t linkmax, namemax, chownres, notrunc; 3208 char *cp2; 3209 struct mbuf *mb, *mb2, *mreq; 3210 struct vnode *vp; 3211 struct vattr at; 3212 nfsfh_t nfh; 3213 fhandle_t *fhp; 3214 u_quad_t frev; 3215 3216 #ifndef nolint 3217 cache = 0; 3218 #endif 3219 fhp = &nfh.fh_generic; 3220 nfsm_srvmtofh(fhp); 3221 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 3222 &rdonly, (nfsd->nd_flag & ND_KERBAUTH)); 3223 if (error) { 3224 nfsm_reply(NFSX_UNSIGNED); 3225 nfsm_srvpostop_attr(getret, &at); 3226 return (0); 3227 } 3228 error = VOP_PATHCONF(vp, _PC_LINK_MAX, &linkmax); 3229 if (!error) 3230 error = VOP_PATHCONF(vp, _PC_NAME_MAX, &namemax); 3231 if (!error) 3232 error = VOP_PATHCONF(vp, _PC_CHOWN_RESTRICTED, &chownres); 3233 if (!error) 3234 error = VOP_PATHCONF(vp, _PC_NO_TRUNC, ¬runc); 3235 getret = VOP_GETATTR(vp, &at, cred, procp); 3236 vput(vp); 3237 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3PATHCONF); 3238 nfsm_srvpostop_attr(getret, &at); 3239 if (error) 3240 return (0); 3241 nfsm_build(pc, struct nfsv3_pathconf *, NFSX_V3PATHCONF); 3242 3243 pc->pc_linkmax = txdr_unsigned(linkmax); 3244 pc->pc_namemax = txdr_unsigned(namemax); 3245 pc->pc_notrunc = txdr_unsigned(notrunc); 3246 pc->pc_chownrestricted = txdr_unsigned(chownres); 3247 3248 /* 3249 * These should probably be supported by VOP_PATHCONF(), but 3250 * until msdosfs is exportable (why would you want to?), the 3251 * Unix defaults should be ok. 3252 */ 3253 pc->pc_caseinsensitive = nfs_false; 3254 pc->pc_casepreserving = nfs_true; 3255 nfsm_srvdone; 3256 } 3257 3258 /* 3259 * Null operation, used by clients to ping server 3260 */ 3261 /* ARGSUSED */ 3262 int 3263 nfsrv_null(nfsd, slp, procp, mrq) 3264 struct nfsrv_descript *nfsd; 3265 struct nfssvc_sock *slp; 3266 struct proc *procp; 3267 struct mbuf **mrq; 3268 { 3269 struct mbuf *mrep = nfsd->nd_mrep; 3270 caddr_t bpos; 3271 int error = NFSERR_RETVOID, cache = 0; 3272 struct mbuf *mb, *mreq; 3273 u_quad_t frev; 3274 3275 nfsm_reply(0); 3276 return (0); 3277 } 3278 3279 /* 3280 * No operation, used for obsolete procedures 3281 */ 3282 /* ARGSUSED */ 3283 int 3284 nfsrv_noop(nfsd, slp, procp, mrq) 3285 struct nfsrv_descript *nfsd; 3286 struct nfssvc_sock *slp; 3287 struct proc *procp; 3288 struct mbuf **mrq; 3289 { 3290 struct mbuf *mrep = nfsd->nd_mrep; 3291 caddr_t bpos; 3292 int error, cache = 0; 3293 struct mbuf *mb, *mreq; 3294 u_quad_t frev; 3295 3296 if (nfsd->nd_repstat) 3297 error = nfsd->nd_repstat; 3298 else 3299 error = EPROCUNAVAIL; 3300 nfsm_reply(0); 3301 return (0); 3302 } 3303 3304 /* 3305 * Perform access checking for vnodes obtained from file handles that would 3306 * refer to files already opened by a Unix client. You cannot just use 3307 * vn_writechk() and VOP_ACCESS() for two reasons. 3308 * 1 - You must check for exported rdonly as well as MNT_RDONLY for the write case 3309 * 2 - The owner is to be given access irrespective of mode bits for some 3310 * operations, so that processes that chmod after opening a file don't 3311 * break. I don't like this because it opens a security hole, but since 3312 * the nfs server opens a security hole the size of a barn door anyhow, 3313 * what the heck. 3314 * 3315 * The exception to rule 2 is EPERM. If a file is IMMUTABLE, VOP_ACCESS() 3316 * will return EPERM instead of EACCESS. EPERM is always an error. 3317 */ 3318 int 3319 nfsrv_access(vp, flags, cred, rdonly, p, override) 3320 register struct vnode *vp; 3321 int flags; 3322 register struct ucred *cred; 3323 int rdonly; 3324 struct proc *p; 3325 { 3326 struct vattr vattr; 3327 int error; 3328 if (flags & VWRITE) { 3329 /* Just vn_writechk() changed to check rdonly */ 3330 /* 3331 * Disallow write attempts on read-only file systems; 3332 * unless the file is a socket or a block or character 3333 * device resident on the file system. 3334 */ 3335 if (rdonly || (vp->v_mount->mnt_flag & MNT_RDONLY)) { 3336 switch (vp->v_type) { 3337 case VREG: 3338 case VDIR: 3339 case VLNK: 3340 return (EROFS); 3341 default: 3342 break; 3343 } 3344 } 3345 /* 3346 * If there's shared text associated with 3347 * the inode, try to free it up once. If 3348 * we fail, we can't allow writing. 3349 */ 3350 if ((vp->v_flag & VTEXT) && !vnode_pager_uncache(vp)) 3351 return (ETXTBSY); 3352 } 3353 error = VOP_GETATTR(vp, &vattr, cred, p); 3354 if (error) 3355 return (error); 3356 error = VOP_ACCESS(vp, flags, cred, p); 3357 /* 3358 * Allow certain operations for the owner (reads and writes 3359 * on files that are already open). 3360 */ 3361 if (override && error == EACCES && cred->cr_uid == vattr.va_uid) 3362 error = 0; 3363 return error; 3364 } 3365
Indexes created Thu Sep 25 06:09:39 GMT 2025