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sys/nfs/nfs_serv.c
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1 /* $NetBSD: nfs_serv.c,v 1.87.2.1 2004/06/05 20:43:20 jdc Exp $ */ 2 3 /* 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Rick Macklem at The University of Guelph. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)nfs_serv.c 8.8 (Berkeley) 7/31/95 35 */ 36 37 /* 38 * nfs version 2 and 3 server calls to vnode ops 39 * - these routines generally have 3 phases 40 * 1 - break down and validate rpc request in mbuf list 41 * 2 - do the vnode ops for the request 42 * (surprisingly ?? many are very similar to syscalls in vfs_syscalls.c) 43 * 3 - build the rpc reply in an mbuf list 44 * nb: 45 * - do not mix the phases, since the nfsm_?? macros can return failures 46 * on a bad rpc or similar and do not do any vrele() or vput()'s 47 * 48 * - the nfsm_reply() macro generates an nfs rpc reply with the nfs 49 * error number iff error != 0 whereas 50 * returning an error from the server function implies a fatal error 51 * such as a badly constructed rpc request that should be dropped without 52 * a reply. 53 * For Version 3, nfsm_reply() does not return for the error case, since 54 * most version 3 rpcs return more than the status for error cases. 55 */ 56 57 #include <sys/cdefs.h> 58 __KERNEL_RCSID(0, "$NetBSD: nfs_serv.c,v 1.87.2.1 2004/06/05 20:43:20 jdc Exp $"); 59 60 #include <sys/param.h> 61 #include <sys/systm.h> 62 #include <sys/proc.h> 63 #include <sys/file.h> 64 #include <sys/namei.h> 65 #include <sys/vnode.h> 66 #include <sys/mount.h> 67 #include <sys/socket.h> 68 #include <sys/socketvar.h> 69 #include <sys/mbuf.h> 70 #include <sys/dirent.h> 71 #include <sys/stat.h> 72 #include <sys/kernel.h> 73 #include <ufs/ufs/dir.h> 74 75 #include <uvm/uvm.h> 76 77 #include <nfs/nfsproto.h> 78 #include <nfs/rpcv2.h> 79 #include <nfs/nfs.h> 80 #include <nfs/xdr_subs.h> 81 #include <nfs/nfsm_subs.h> 82 #include <nfs/nqnfs.h> 83 #include <nfs/nfs_var.h> 84 85 /* Global vars */ 86 extern u_int32_t nfs_xdrneg1; 87 extern u_int32_t nfs_false, nfs_true; 88 extern enum vtype nv3tov_type[8]; 89 extern struct nfsstats nfsstats; 90 extern const nfstype nfsv2_type[9]; 91 extern const nfstype nfsv3_type[9]; 92 int nfsrvw_procrastinate = NFS_GATHERDELAY * 1000; 93 int nfsd_use_loan = 1; /* use page-loan for READ OP */ 94 95 /* 96 * nfs v3 access service 97 */ 98 int 99 nfsrv3_access(nfsd, slp, procp, mrq) 100 struct nfsrv_descript *nfsd; 101 struct nfssvc_sock *slp; 102 struct proc *procp; 103 struct mbuf **mrq; 104 { 105 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 106 struct mbuf *nam = nfsd->nd_nam; 107 caddr_t dpos = nfsd->nd_dpos; 108 struct ucred *cred = &nfsd->nd_cr; 109 struct vnode *vp; 110 nfsfh_t nfh; 111 fhandle_t *fhp; 112 u_int32_t *tl; 113 int32_t t1; 114 caddr_t bpos; 115 int error = 0, rdonly, cache = 0, getret; 116 char *cp2; 117 struct mbuf *mb, *mreq; 118 struct vattr va; 119 u_long inmode, testmode, outmode; 120 u_quad_t frev; 121 122 fhp = &nfh.fh_generic; 123 nfsm_srvmtofh(fhp); 124 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 125 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, &rdonly, 126 (nfsd->nd_flag & ND_KERBAUTH), FALSE); 127 if (error) { 128 nfsm_reply(NFSX_UNSIGNED); 129 nfsm_srvpostop_attr(1, (struct vattr *)0); 130 return (0); 131 } 132 inmode = fxdr_unsigned(u_int32_t, *tl); 133 outmode = 0; 134 if ((inmode & NFSV3ACCESS_READ) && 135 nfsrv_access(vp, VREAD, cred, rdonly, procp, 0) == 0) 136 outmode |= NFSV3ACCESS_READ; 137 if (vp->v_type != VDIR) { 138 testmode = inmode & (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND); 139 if (testmode && 140 nfsrv_access(vp, VWRITE, cred, rdonly, procp, 0) == 0) 141 outmode |= testmode; 142 if ((inmode & NFSV3ACCESS_EXECUTE) && 143 nfsrv_access(vp, VEXEC, cred, rdonly, procp, 0) == 0) 144 outmode |= NFSV3ACCESS_EXECUTE; 145 } else { 146 testmode = inmode & (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | 147 NFSV3ACCESS_DELETE); 148 if (testmode && 149 nfsrv_access(vp, VWRITE, cred, rdonly, procp, 0) == 0) 150 outmode |= testmode; 151 if ((inmode & NFSV3ACCESS_LOOKUP) && 152 nfsrv_access(vp, VEXEC, cred, rdonly, procp, 0) == 0) 153 outmode |= NFSV3ACCESS_LOOKUP; 154 } 155 getret = VOP_GETATTR(vp, &va, cred, procp); 156 vput(vp); 157 nfsm_reply(NFSX_POSTOPATTR(1) + NFSX_UNSIGNED); 158 nfsm_srvpostop_attr(getret, &va); 159 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 160 *tl = txdr_unsigned(outmode); 161 nfsm_srvdone; 162 } 163 164 /* 165 * nfs getattr service 166 */ 167 int 168 nfsrv_getattr(nfsd, slp, procp, mrq) 169 struct nfsrv_descript *nfsd; 170 struct nfssvc_sock *slp; 171 struct proc *procp; 172 struct mbuf **mrq; 173 { 174 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 175 struct mbuf *nam = nfsd->nd_nam; 176 caddr_t dpos = nfsd->nd_dpos; 177 struct ucred *cred = &nfsd->nd_cr; 178 struct nfs_fattr *fp; 179 struct vattr va; 180 struct vnode *vp; 181 nfsfh_t nfh; 182 fhandle_t *fhp; 183 u_int32_t *tl; 184 int32_t t1; 185 caddr_t bpos; 186 int error = 0, rdonly, cache; 187 char *cp2; 188 struct mbuf *mb, *mreq; 189 u_quad_t frev; 190 191 fhp = &nfh.fh_generic; 192 nfsm_srvmtofh(fhp); 193 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, &rdonly, 194 (nfsd->nd_flag & ND_KERBAUTH), FALSE); 195 if (error) { 196 nfsm_reply(0); 197 return (0); 198 } 199 nqsrv_getl(vp, ND_READ); 200 error = VOP_GETATTR(vp, &va, cred, procp); 201 vput(vp); 202 nfsm_reply(NFSX_FATTR(nfsd->nd_flag & ND_NFSV3)); 203 if (error) 204 return (0); 205 nfsm_build(fp, struct nfs_fattr *, NFSX_FATTR(nfsd->nd_flag & ND_NFSV3)); 206 nfsm_srvfillattr(&va, fp); 207 nfsm_srvdone; 208 } 209 210 /* 211 * nfs setattr service 212 */ 213 int 214 nfsrv_setattr(nfsd, slp, procp, mrq) 215 struct nfsrv_descript *nfsd; 216 struct nfssvc_sock *slp; 217 struct proc *procp; 218 struct mbuf **mrq; 219 { 220 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 221 struct mbuf *nam = nfsd->nd_nam; 222 caddr_t dpos = nfsd->nd_dpos; 223 struct ucred *cred = &nfsd->nd_cr; 224 struct vattr va, preat; 225 struct nfsv2_sattr *sp; 226 struct nfs_fattr *fp; 227 struct vnode *vp; 228 nfsfh_t nfh; 229 fhandle_t *fhp; 230 u_int32_t *tl; 231 int32_t t1; 232 caddr_t bpos; 233 int error = 0, rdonly, cache, preat_ret = 1, postat_ret = 1; 234 int v3 = (nfsd->nd_flag & ND_NFSV3), gcheck = 0; 235 char *cp2; 236 struct mbuf *mb, *mreq; 237 u_quad_t frev; 238 struct timespec guard; 239 struct mount *mp = NULL; 240 241 fhp = &nfh.fh_generic; 242 nfsm_srvmtofh(fhp); 243 if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) 244 return (ESTALE); 245 vn_start_write(NULL, &mp, V_WAIT); 246 VATTR_NULL(&va); 247 if (v3) { 248 nfsm_srvsattr(&va); 249 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 250 gcheck = fxdr_unsigned(int, *tl); 251 if (gcheck) { 252 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 253 fxdr_nfsv3time(tl, &guard); 254 } 255 } else { 256 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 257 /* 258 * Nah nah nah nah na nah 259 * There is a bug in the Sun client that puts 0xffff in the mode 260 * field of sattr when it should put in 0xffffffff. The u_short 261 * doesn't sign extend. 262 * --> check the low order 2 bytes for 0xffff 263 */ 264 if ((fxdr_unsigned(int, sp->sa_mode) & 0xffff) != 0xffff) 265 va.va_mode = nfstov_mode(sp->sa_mode); 266 if (sp->sa_uid != nfs_xdrneg1) 267 va.va_uid = fxdr_unsigned(uid_t, sp->sa_uid); 268 if (sp->sa_gid != nfs_xdrneg1) 269 va.va_gid = fxdr_unsigned(gid_t, sp->sa_gid); 270 if (sp->sa_size != nfs_xdrneg1) 271 va.va_size = fxdr_unsigned(u_quad_t, sp->sa_size); 272 if (sp->sa_atime.nfsv2_sec != nfs_xdrneg1) { 273 #ifdef notyet 274 fxdr_nfsv2time(&sp->sa_atime, &va.va_atime); 275 #else 276 va.va_atime.tv_sec = 277 fxdr_unsigned(u_int32_t,sp->sa_atime.nfsv2_sec); 278 va.va_atime.tv_nsec = 0; 279 #endif 280 } 281 if (sp->sa_mtime.nfsv2_sec != nfs_xdrneg1) 282 fxdr_nfsv2time(&sp->sa_mtime, &va.va_mtime); 283 284 } 285 286 /* 287 * Now that we have all the fields, lets do it. 288 */ 289 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, &rdonly, 290 (nfsd->nd_flag & ND_KERBAUTH), FALSE); 291 if (error) { 292 nfsm_reply(2 * NFSX_UNSIGNED); 293 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 294 vn_finished_write(mp, 0); 295 return (0); 296 } 297 nqsrv_getl(vp, ND_WRITE); 298 if (v3) { 299 error = preat_ret = VOP_GETATTR(vp, &preat, cred, procp); 300 if (!error && gcheck && 301 (preat.va_ctime.tv_sec != guard.tv_sec || 302 preat.va_ctime.tv_nsec != guard.tv_nsec)) 303 error = NFSERR_NOT_SYNC; 304 if (error) { 305 vput(vp); 306 nfsm_reply(NFSX_WCCDATA(v3)); 307 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 308 vn_finished_write(mp, 0); 309 return (0); 310 } 311 } 312 313 /* 314 * If the size is being changed write acces is required, otherwise 315 * just check for a read only file system. 316 */ 317 if (va.va_size == ((u_quad_t)((quad_t) -1))) { 318 if (rdonly || (vp->v_mount->mnt_flag & MNT_RDONLY)) { 319 error = EROFS; 320 goto out; 321 } 322 } else { 323 if (vp->v_type == VDIR) { 324 error = EISDIR; 325 goto out; 326 } else if ((error = nfsrv_access(vp, VWRITE, cred, rdonly, 327 procp, 0)) != 0) 328 goto out; 329 } 330 error = VOP_SETATTR(vp, &va, cred, procp); 331 postat_ret = VOP_GETATTR(vp, &va, cred, procp); 332 if (!error) 333 error = postat_ret; 334 out: 335 vput(vp); 336 vn_finished_write(mp, 0); 337 nfsm_reply(NFSX_WCCORFATTR(v3)); 338 if (v3) { 339 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 340 return (0); 341 } else { 342 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 343 nfsm_srvfillattr(&va, fp); 344 } 345 nfsm_srvdone; 346 } 347 348 /* 349 * nfs lookup rpc 350 */ 351 int 352 nfsrv_lookup(nfsd, slp, procp, mrq) 353 struct nfsrv_descript *nfsd; 354 struct nfssvc_sock *slp; 355 struct proc *procp; 356 struct mbuf **mrq; 357 { 358 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 359 struct mbuf *nam = nfsd->nd_nam; 360 caddr_t dpos = nfsd->nd_dpos; 361 struct ucred *cred = &nfsd->nd_cr; 362 struct nfs_fattr *fp; 363 struct nameidata nd, ind, *ndp = &nd; 364 struct vnode *vp, *dirp; 365 nfsfh_t nfh; 366 fhandle_t *fhp; 367 caddr_t cp; 368 u_int32_t *tl; 369 int32_t t1; 370 caddr_t bpos; 371 int error = 0, cache, dirattr_ret = 1; 372 uint32_t len; 373 int v3 = (nfsd->nd_flag & ND_NFSV3), pubflag; 374 char *cp2; 375 struct mbuf *mb, *mreq; 376 struct vattr va, dirattr; 377 u_quad_t frev; 378 379 fhp = &nfh.fh_generic; 380 nfsm_srvmtofh(fhp); 381 nfsm_srvnamesiz(len); 382 383 pubflag = nfs_ispublicfh(fhp); 384 385 nd.ni_cnd.cn_cred = cred; 386 nd.ni_cnd.cn_nameiop = LOOKUP; 387 nd.ni_cnd.cn_flags = LOCKLEAF | SAVESTART; 388 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 389 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), pubflag); 390 391 if (!error && pubflag) { 392 if (nd.ni_vp->v_type == VDIR && nfs_pub.np_index != NULL) { 393 /* 394 * Setup call to lookup() to see if we can find 395 * the index file. Arguably, this doesn't belong 396 * in a kernel.. Ugh. 397 */ 398 ind = nd; 399 VOP_UNLOCK(nd.ni_vp, 0); 400 ind.ni_pathlen = strlen(nfs_pub.np_index); 401 ind.ni_cnd.cn_nameptr = ind.ni_cnd.cn_pnbuf = 402 nfs_pub.np_index; 403 ind.ni_startdir = nd.ni_vp; 404 VREF(ind.ni_startdir); 405 error = lookup(&ind); 406 if (!error) { 407 /* 408 * Found an index file. Get rid of 409 * the old references. 410 */ 411 if (dirp) 412 vrele(dirp); 413 dirp = nd.ni_vp; 414 vrele(nd.ni_startdir); 415 ndp = &ind; 416 } else 417 error = 0; 418 } 419 /* 420 * If the public filehandle was used, check that this lookup 421 * didn't result in a filehandle outside the publicly exported 422 * filesystem. 423 */ 424 425 if (!error && ndp->ni_vp->v_mount != nfs_pub.np_mount) { 426 vput(nd.ni_vp); 427 error = EPERM; 428 } 429 } 430 431 if (dirp) { 432 if (v3) 433 dirattr_ret = VOP_GETATTR(dirp, &dirattr, cred, 434 procp); 435 vrele(dirp); 436 } 437 438 if (error) { 439 nfsm_reply(NFSX_POSTOPATTR(v3)); 440 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 441 return (0); 442 } 443 444 nqsrv_getl(ndp->ni_startdir, ND_READ); 445 vrele(ndp->ni_startdir); 446 PNBUF_PUT(nd.ni_cnd.cn_pnbuf); 447 vp = ndp->ni_vp; 448 memset((caddr_t)fhp, 0, sizeof(nfh)); 449 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; 450 error = VFS_VPTOFH(vp, &fhp->fh_fid); 451 if (!error) 452 error = VOP_GETATTR(vp, &va, cred, procp); 453 vput(vp); 454 nfsm_reply(NFSX_SRVFH(v3) + NFSX_POSTOPORFATTR(v3) + NFSX_POSTOPATTR(v3)); 455 if (error) { 456 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 457 return (0); 458 } 459 nfsm_srvfhtom(fhp, v3); 460 if (v3) { 461 nfsm_srvpostop_attr(0, &va); 462 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 463 } else { 464 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 465 nfsm_srvfillattr(&va, fp); 466 } 467 nfsm_srvdone; 468 } 469 470 /* 471 * nfs readlink service 472 */ 473 int 474 nfsrv_readlink(nfsd, slp, procp, mrq) 475 struct nfsrv_descript *nfsd; 476 struct nfssvc_sock *slp; 477 struct proc *procp; 478 struct mbuf **mrq; 479 { 480 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 481 struct mbuf *nam = nfsd->nd_nam; 482 caddr_t dpos = nfsd->nd_dpos; 483 struct ucred *cred = &nfsd->nd_cr; 484 struct iovec iv[(NFS_MAXPATHLEN+MLEN-1)/MLEN]; 485 struct iovec *ivp = iv; 486 struct mbuf *mp; 487 u_int32_t *tl; 488 int32_t t1; 489 caddr_t bpos; 490 int error = 0, rdonly, cache, i, padlen, getret; 491 uint32_t len; 492 int v3 = (nfsd->nd_flag & ND_NFSV3); 493 char *cp2; 494 struct mbuf *mb, *mp2 = NULL, *mp3 = NULL, *mreq; 495 struct vnode *vp; 496 struct vattr attr; 497 nfsfh_t nfh; 498 fhandle_t *fhp; 499 struct uio io, *uiop = &io; 500 u_quad_t frev; 501 502 fhp = &nfh.fh_generic; 503 nfsm_srvmtofh(fhp); 504 len = 0; 505 i = 0; 506 while (len < NFS_MAXPATHLEN) { 507 mp = m_get(M_WAIT, MT_DATA); 508 MCLAIM(mp, &nfs_mowner); 509 m_clget(mp, M_WAIT); 510 mp->m_len = NFSMSIZ(mp); 511 if (len == 0) 512 mp3 = mp2 = mp; 513 else { 514 mp2->m_next = mp; 515 mp2 = mp; 516 } 517 if ((len+mp->m_len) > NFS_MAXPATHLEN) { 518 mp->m_len = NFS_MAXPATHLEN-len; 519 len = NFS_MAXPATHLEN; 520 } else 521 len += mp->m_len; 522 ivp->iov_base = mtod(mp, caddr_t); 523 ivp->iov_len = mp->m_len; 524 i++; 525 ivp++; 526 } 527 uiop->uio_iov = iv; 528 uiop->uio_iovcnt = i; 529 uiop->uio_offset = 0; 530 uiop->uio_resid = len; 531 uiop->uio_rw = UIO_READ; 532 uiop->uio_segflg = UIO_SYSSPACE; 533 uiop->uio_procp = (struct proc *)0; 534 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 535 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 536 if (error) { 537 m_freem(mp3); 538 nfsm_reply(2 * NFSX_UNSIGNED); 539 nfsm_srvpostop_attr(1, (struct vattr *)0); 540 return (0); 541 } 542 if (vp->v_type != VLNK) { 543 if (v3) 544 error = EINVAL; 545 else 546 error = ENXIO; 547 goto out; 548 } 549 nqsrv_getl(vp, ND_READ); 550 error = VOP_READLINK(vp, uiop, cred); 551 out: 552 getret = VOP_GETATTR(vp, &attr, cred, procp); 553 vput(vp); 554 if (error) 555 m_freem(mp3); 556 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_UNSIGNED); 557 if (v3) { 558 nfsm_srvpostop_attr(getret, &attr); 559 if (error) 560 return (0); 561 } 562 len -= uiop->uio_resid; 563 padlen = nfsm_padlen(len); 564 if (uiop->uio_resid || padlen) 565 nfs_zeropad(mp3, uiop->uio_resid, padlen); 566 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 567 *tl = txdr_unsigned(len); 568 mb->m_next = mp3; 569 nfsm_srvdone; 570 } 571 572 /* 573 * nfs read service 574 */ 575 int 576 nfsrv_read(nfsd, slp, procp, mrq) 577 struct nfsrv_descript *nfsd; 578 struct nfssvc_sock *slp; 579 struct proc *procp; 580 struct mbuf **mrq; 581 { 582 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 583 struct mbuf *nam = nfsd->nd_nam; 584 caddr_t dpos = nfsd->nd_dpos; 585 struct ucred *cred = &nfsd->nd_cr; 586 struct mbuf *m; 587 struct nfs_fattr *fp; 588 u_int32_t *tl; 589 int32_t t1; 590 int i; 591 caddr_t bpos; 592 int error = 0, rdonly, cache, getret; 593 int v3 = (nfsd->nd_flag & ND_NFSV3); 594 uint32_t reqlen, len, cnt, left; 595 int padlen; 596 char *cp2; 597 struct mbuf *mb, *mreq; 598 struct vnode *vp; 599 nfsfh_t nfh; 600 fhandle_t *fhp; 601 struct uio io, *uiop = &io; 602 struct vattr va; 603 off_t off; 604 u_quad_t frev; 605 606 fhp = &nfh.fh_generic; 607 nfsm_srvmtofh(fhp); 608 if (v3) { 609 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 610 off = fxdr_hyper(tl); 611 } else { 612 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 613 off = (off_t)fxdr_unsigned(u_int32_t, *tl); 614 } 615 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 616 reqlen = fxdr_unsigned(uint32_t, *tl); 617 reqlen = MIN(reqlen, NFS_SRVMAXDATA(nfsd)); 618 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 619 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 620 if (error) { 621 nfsm_reply(2 * NFSX_UNSIGNED); 622 nfsm_srvpostop_attr(1, (struct vattr *)0); 623 return (0); 624 } 625 if (vp->v_type != VREG) { 626 if (v3) 627 error = EINVAL; 628 else 629 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 630 } 631 if (!error) { 632 nqsrv_getl(vp, ND_READ); 633 if ((error = nfsrv_access(vp, VREAD, cred, rdonly, procp, 1)) != 0) 634 error = nfsrv_access(vp, VEXEC, cred, rdonly, procp, 1); 635 } 636 getret = VOP_GETATTR(vp, &va, cred, procp); 637 if (!error) 638 error = getret; 639 if (error) { 640 vput(vp); 641 nfsm_reply(NFSX_POSTOPATTR(v3)); 642 nfsm_srvpostop_attr(getret, &va); 643 return (0); 644 } 645 if (off >= va.va_size) 646 cnt = 0; 647 else if ((off + reqlen) > va.va_size) 648 cnt = va.va_size - off; 649 else 650 cnt = reqlen; 651 nfsm_reply(NFSX_POSTOPORFATTR(v3) + 3 * NFSX_UNSIGNED+nfsm_rndup(cnt)); 652 if (v3) { 653 nfsm_build(tl, u_int32_t *, NFSX_V3FATTR + 4 * NFSX_UNSIGNED); 654 *tl++ = nfs_true; 655 fp = (struct nfs_fattr *)tl; 656 tl += (NFSX_V3FATTR / sizeof (u_int32_t)); 657 } else { 658 nfsm_build(tl, u_int32_t *, NFSX_V2FATTR + NFSX_UNSIGNED); 659 fp = (struct nfs_fattr *)tl; 660 tl += (NFSX_V2FATTR / sizeof (u_int32_t)); 661 } 662 len = left = cnt; 663 if (cnt > 0) { 664 if (nfsd_use_loan) { 665 struct vm_page **pgpp; 666 voff_t pgoff = trunc_page(off); 667 int npages; 668 vaddr_t lva; 669 670 npages = (round_page(off + cnt) - pgoff) >> PAGE_SHIFT; 671 KASSERT(npages <= M_EXT_MAXPAGES); /* XXX */ 672 673 /* allocate kva for mbuf data */ 674 lva = sokvaalloc(npages << PAGE_SHIFT, slp->ns_so); 675 if (lva == 0) { 676 /* fall back to VOP_READ */ 677 goto loan_fail; 678 } 679 680 /* allocate mbuf */ 681 m = m_get(M_WAIT, MT_DATA); 682 MCLAIM(m, &nfs_mowner); 683 pgpp = m->m_ext.ext_pgs; 684 685 /* loan pages */ 686 error = uvm_loanuobjpages(&vp->v_uobj, pgoff, npages, 687 pgpp); 688 if (error) { 689 sokvafree(lva, npages << PAGE_SHIFT); 690 m_free(m); 691 goto read_error; 692 } 693 694 /* associate kva to mbuf */ 695 MEXTADD(m, (void *)(lva + ((vaddr_t)off & PAGE_MASK)), 696 cnt, M_MBUF, soloanfree, slp->ns_so); 697 m->m_flags |= M_EXT_PAGES | M_EXT_ROMAP; 698 m->m_len = cnt; 699 700 /* map pages */ 701 for (i = 0; i < npages; i++) { 702 pmap_kenter_pa(lva, VM_PAGE_TO_PHYS(pgpp[i]), 703 VM_PROT_READ); 704 lva += PAGE_SIZE; 705 } 706 707 pmap_update(pmap_kernel()); 708 709 mb->m_next = m; 710 mb = m; 711 error = 0; 712 uiop->uio_resid = 0; 713 } else { 714 struct iovec *iv; 715 struct iovec *iv2; 716 struct mbuf *m2; 717 int siz; 718 loan_fail: 719 /* 720 * Generate the mbuf list with the uio_iov ref. to it. 721 */ 722 i = 0; 723 m = m2 = mb; 724 while (left > 0) { 725 siz = min(M_TRAILINGSPACE(m), left); 726 if (siz > 0) { 727 left -= siz; 728 i++; 729 } 730 if (left > 0) { 731 m = m_get(M_WAIT, MT_DATA); 732 MCLAIM(m, &nfs_mowner); 733 m_clget(m, M_WAIT); 734 m->m_len = 0; 735 m2->m_next = m; 736 m2 = m; 737 } 738 } 739 iv = malloc(i * sizeof(struct iovec), M_TEMP, M_WAITOK); 740 uiop->uio_iov = iv2 = iv; 741 m = mb; 742 left = cnt; 743 i = 0; 744 while (left > 0) { 745 if (m == NULL) 746 panic("nfsrv_read iov"); 747 siz = min(M_TRAILINGSPACE(m), left); 748 if (siz > 0) { 749 iv->iov_base = mtod(m, caddr_t) + 750 m->m_len; 751 iv->iov_len = siz; 752 m->m_len += siz; 753 left -= siz; 754 iv++; 755 i++; 756 } 757 m = m->m_next; 758 } 759 uiop->uio_iovcnt = i; 760 uiop->uio_offset = off; 761 uiop->uio_resid = cnt; 762 uiop->uio_rw = UIO_READ; 763 uiop->uio_segflg = UIO_SYSSPACE; 764 error = VOP_READ(vp, uiop, IO_NODELOCKED, cred); 765 free((caddr_t)iv2, M_TEMP); 766 } 767 read_error: 768 if (error || (getret = VOP_GETATTR(vp, &va, cred, procp)) != 0){ 769 if (!error) 770 error = getret; 771 m_freem(mreq); 772 vput(vp); 773 nfsm_reply(NFSX_POSTOPATTR(v3)); 774 nfsm_srvpostop_attr(getret, &va); 775 return (0); 776 } 777 } else { 778 uiop->uio_resid = 0; 779 } 780 vput(vp); 781 nfsm_srvfillattr(&va, fp); 782 len -= uiop->uio_resid; 783 padlen = nfsm_padlen(len); 784 if (uiop->uio_resid || padlen) 785 nfs_zeropad(mb, uiop->uio_resid, padlen); 786 if (v3) { 787 /* count */ 788 *tl++ = txdr_unsigned(len); 789 /* eof */ 790 if (off + len >= va.va_size) 791 *tl++ = nfs_true; 792 else 793 *tl++ = nfs_false; 794 } 795 *tl = txdr_unsigned(len); 796 nfsm_srvdone; 797 } 798 799 /* 800 * nfs write service 801 */ 802 int 803 nfsrv_write(nfsd, slp, procp, mrq) 804 struct nfsrv_descript *nfsd; 805 struct nfssvc_sock *slp; 806 struct proc *procp; 807 struct mbuf **mrq; 808 { 809 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 810 struct mbuf *nam = nfsd->nd_nam; 811 caddr_t dpos = nfsd->nd_dpos; 812 struct ucred *cred = &nfsd->nd_cr; 813 struct iovec *ivp; 814 int i, cnt; 815 struct mbuf *mp; 816 struct nfs_fattr *fp; 817 struct iovec *iv; 818 struct vattr va, forat; 819 u_int32_t *tl; 820 int32_t t1; 821 caddr_t bpos; 822 int error = 0, rdonly, cache, len, forat_ret = 1; 823 int ioflags, aftat_ret = 1, retlen, zeroing, adjust; 824 int stable = NFSV3WRITE_FILESYNC; 825 int v3 = (nfsd->nd_flag & ND_NFSV3); 826 char *cp2; 827 struct mbuf *mb, *mreq; 828 struct vnode *vp; 829 nfsfh_t nfh; 830 fhandle_t *fhp; 831 struct uio io, *uiop = &io; 832 off_t off; 833 u_quad_t frev; 834 struct mount *mntp = NULL; 835 836 if (mrep == NULL) { 837 *mrq = NULL; 838 return (0); 839 } 840 fhp = &nfh.fh_generic; 841 nfsm_srvmtofh(fhp); 842 if ((mntp = vfs_getvfs(&fhp->fh_fsid)) == NULL) 843 return (ESTALE); 844 vn_start_write(NULL, &mntp, V_WAIT); 845 if (v3) { 846 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 847 off = fxdr_hyper(tl); 848 tl += 3; 849 stable = fxdr_unsigned(int, *tl++); 850 } else { 851 nfsm_dissect(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 852 off = (off_t)fxdr_unsigned(u_int32_t, *++tl); 853 tl += 2; 854 } 855 retlen = len = fxdr_unsigned(int32_t, *tl); 856 cnt = i = 0; 857 858 /* 859 * For NFS Version 2, it is not obvious what a write of zero length 860 * should do, but I might as well be consistent with Version 3, 861 * which is to return ok so long as there are no permission problems. 862 */ 863 if (len > 0) { 864 zeroing = 1; 865 mp = mrep; 866 while (mp) { 867 if (mp == md) { 868 zeroing = 0; 869 adjust = dpos - mtod(mp, caddr_t); 870 mp->m_len -= adjust; 871 if (mp->m_len > 0 && adjust > 0) 872 NFSMADV(mp, adjust); 873 } 874 if (zeroing) 875 mp->m_len = 0; 876 else if (mp->m_len > 0) { 877 i += mp->m_len; 878 if (i > len) { 879 mp->m_len -= (i - len); 880 zeroing = 1; 881 } 882 if (mp->m_len > 0) 883 cnt++; 884 } 885 mp = mp->m_next; 886 } 887 } 888 if (len > NFS_MAXDATA || len < 0 || i < len) { 889 error = EIO; 890 nfsm_reply(2 * NFSX_UNSIGNED); 891 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 892 vn_finished_write(mntp, 0); 893 return (0); 894 } 895 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 896 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 897 if (error) { 898 nfsm_reply(2 * NFSX_UNSIGNED); 899 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 900 vn_finished_write(mntp, 0); 901 return (0); 902 } 903 if (v3) 904 forat_ret = VOP_GETATTR(vp, &forat, cred, procp); 905 if (vp->v_type != VREG) { 906 if (v3) 907 error = EINVAL; 908 else 909 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 910 } 911 if (!error) { 912 nqsrv_getl(vp, ND_WRITE); 913 error = nfsrv_access(vp, VWRITE, cred, rdonly, procp, 1); 914 } 915 if (error) { 916 vput(vp); 917 nfsm_reply(NFSX_WCCDATA(v3)); 918 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 919 vn_finished_write(mntp, 0); 920 return (0); 921 } 922 923 if (len > 0) { 924 ivp = malloc(cnt * sizeof (struct iovec), M_TEMP, M_WAITOK); 925 uiop->uio_iov = iv = ivp; 926 uiop->uio_iovcnt = cnt; 927 mp = mrep; 928 while (mp) { 929 if (mp->m_len > 0) { 930 ivp->iov_base = mtod(mp, caddr_t); 931 ivp->iov_len = mp->m_len; 932 ivp++; 933 } 934 mp = mp->m_next; 935 } 936 937 /* 938 * XXX 939 * The IO_METASYNC flag indicates that all metadata (and not 940 * just enough to ensure data integrity) must be written to 941 * stable storage synchronously. 942 * (IO_METASYNC is not yet implemented in 4.4BSD-Lite.) 943 */ 944 if (stable == NFSV3WRITE_UNSTABLE) 945 ioflags = IO_NODELOCKED; 946 else if (stable == NFSV3WRITE_DATASYNC) 947 ioflags = (IO_SYNC | IO_NODELOCKED); 948 else 949 ioflags = (IO_METASYNC | IO_SYNC | IO_NODELOCKED); 950 uiop->uio_resid = len; 951 uiop->uio_rw = UIO_WRITE; 952 uiop->uio_segflg = UIO_SYSSPACE; 953 uiop->uio_procp = (struct proc *)0; 954 uiop->uio_offset = off; 955 error = VOP_WRITE(vp, uiop, ioflags, cred); 956 nfsstats.srvvop_writes++; 957 free(iv, M_TEMP); 958 } 959 aftat_ret = VOP_GETATTR(vp, &va, cred, procp); 960 vput(vp); 961 vn_finished_write(mntp, 0); 962 if (!error) 963 error = aftat_ret; 964 nfsm_reply(NFSX_PREOPATTR(v3) + NFSX_POSTOPORFATTR(v3) + 965 2 * NFSX_UNSIGNED + NFSX_WRITEVERF(v3)); 966 if (v3) { 967 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 968 if (error) 969 return (0); 970 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 971 *tl++ = txdr_unsigned(retlen); 972 if (stable == NFSV3WRITE_UNSTABLE) 973 *tl++ = txdr_unsigned(stable); 974 else 975 *tl++ = txdr_unsigned(NFSV3WRITE_FILESYNC); 976 /* 977 * Actually, there is no need to txdr these fields, 978 * but it may make the values more human readable, 979 * for debugging purposes. 980 */ 981 *tl++ = txdr_unsigned(boottime.tv_sec); 982 *tl = txdr_unsigned(boottime.tv_usec); 983 } else { 984 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 985 nfsm_srvfillattr(&va, fp); 986 } 987 nfsm_srvdone; 988 } 989 990 /* 991 * NFS write service with write gathering support. Called when 992 * nfsrvw_procrastinate > 0. 993 * See: Chet Juszczak, "Improving the Write Performance of an NFS Server", 994 * in Proc. of the Winter 1994 Usenix Conference, pg. 247-259, San Franscisco, 995 * Jan. 1994. 996 */ 997 int 998 nfsrv_writegather(ndp, slp, procp, mrq) 999 struct nfsrv_descript **ndp; 1000 struct nfssvc_sock *slp; 1001 struct proc *procp; 1002 struct mbuf **mrq; 1003 { 1004 struct iovec *ivp; 1005 struct mbuf *mp; 1006 struct nfsrv_descript *wp, *nfsd, *owp, *swp; 1007 struct nfs_fattr *fp; 1008 int i = 0; 1009 struct iovec *iov; 1010 struct nfsrvw_delayhash *wpp; 1011 struct ucred *cred; 1012 struct vattr va, forat; 1013 u_int32_t *tl; 1014 int32_t t1; 1015 caddr_t bpos, dpos; 1016 int error = 0, rdonly, cache, len = 0, forat_ret = 1; 1017 int ioflags, aftat_ret = 1, s, adjust, v3, zeroing; 1018 char *cp2; 1019 struct mbuf *mb, *mreq, *mrep, *md; 1020 struct vnode *vp; 1021 struct uio io, *uiop = &io; 1022 u_quad_t frev, cur_usec; 1023 struct mount *mntp = NULL; 1024 1025 *mrq = NULL; 1026 if (*ndp) { 1027 nfsd = *ndp; 1028 *ndp = NULL; 1029 mrep = nfsd->nd_mrep; 1030 md = nfsd->nd_md; 1031 dpos = nfsd->nd_dpos; 1032 cred = &nfsd->nd_cr; 1033 v3 = (nfsd->nd_flag & ND_NFSV3); 1034 LIST_INIT(&nfsd->nd_coalesce); 1035 nfsd->nd_mreq = NULL; 1036 nfsd->nd_stable = NFSV3WRITE_FILESYNC; 1037 cur_usec = (u_quad_t)time.tv_sec * 1000000 + (u_quad_t)time.tv_usec; 1038 nfsd->nd_time = cur_usec + nfsrvw_procrastinate; 1039 1040 /* 1041 * Now, get the write header.. 1042 */ 1043 nfsm_srvmtofh(&nfsd->nd_fh); 1044 if (v3) { 1045 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 1046 nfsd->nd_off = fxdr_hyper(tl); 1047 tl += 3; 1048 nfsd->nd_stable = fxdr_unsigned(int, *tl++); 1049 } else { 1050 nfsm_dissect(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1051 nfsd->nd_off = (off_t)fxdr_unsigned(u_int32_t, *++tl); 1052 tl += 2; 1053 } 1054 len = fxdr_unsigned(int32_t, *tl); 1055 nfsd->nd_len = len; 1056 nfsd->nd_eoff = nfsd->nd_off + len; 1057 1058 /* 1059 * Trim the header out of the mbuf list and trim off any trailing 1060 * junk so that the mbuf list has only the write data. 1061 */ 1062 zeroing = 1; 1063 i = 0; 1064 mp = mrep; 1065 while (mp) { 1066 if (mp == md) { 1067 zeroing = 0; 1068 adjust = dpos - mtod(mp, caddr_t); 1069 mp->m_len -= adjust; 1070 if (mp->m_len > 0 && adjust > 0) 1071 NFSMADV(mp, adjust); 1072 } 1073 if (zeroing) 1074 mp->m_len = 0; 1075 else { 1076 i += mp->m_len; 1077 if (i > len) { 1078 mp->m_len -= (i - len); 1079 zeroing = 1; 1080 } 1081 } 1082 mp = mp->m_next; 1083 } 1084 if (len > NFS_MAXDATA || len < 0 || i < len) { 1085 nfsmout: 1086 m_freem(mrep); 1087 error = EIO; 1088 nfsm_writereply(2 * NFSX_UNSIGNED, v3); 1089 if (v3) 1090 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1091 nfsd->nd_mreq = mreq; 1092 nfsd->nd_mrep = NULL; 1093 nfsd->nd_time = 0; 1094 } 1095 1096 /* 1097 * Add this entry to the hash and time queues. 1098 */ 1099 s = splsoftclock(); 1100 owp = NULL; 1101 wp = LIST_FIRST(&slp->ns_tq); 1102 while (wp && wp->nd_time < nfsd->nd_time) { 1103 owp = wp; 1104 wp = LIST_NEXT(wp, nd_tq); 1105 } 1106 if (owp) { 1107 LIST_INSERT_AFTER(owp, nfsd, nd_tq); 1108 } else { 1109 LIST_INSERT_HEAD(&slp->ns_tq, nfsd, nd_tq); 1110 } 1111 if (nfsd->nd_mrep) { 1112 wpp = NWDELAYHASH(slp, nfsd->nd_fh.fh_fid.fid_data); 1113 owp = NULL; 1114 wp = LIST_FIRST(wpp); 1115 while (wp && 1116 memcmp((caddr_t)&nfsd->nd_fh, (caddr_t)&wp->nd_fh, NFSX_V3FH)) { 1117 owp = wp; 1118 wp = LIST_NEXT(wp, nd_hash); 1119 } 1120 while (wp && wp->nd_off < nfsd->nd_off && 1121 !memcmp((caddr_t)&nfsd->nd_fh, (caddr_t)&wp->nd_fh, NFSX_V3FH)) { 1122 owp = wp; 1123 wp = LIST_NEXT(wp, nd_hash); 1124 } 1125 if (owp) { 1126 LIST_INSERT_AFTER(owp, nfsd, nd_hash); 1127 1128 /* 1129 * Search the hash list for overlapping entries and 1130 * coalesce. 1131 */ 1132 for(; nfsd && NFSW_CONTIG(owp, nfsd); nfsd = wp) { 1133 wp = LIST_NEXT(nfsd, nd_hash); 1134 if (NFSW_SAMECRED(owp, nfsd)) 1135 nfsrvw_coalesce(owp, nfsd); 1136 } 1137 } else { 1138 LIST_INSERT_HEAD(wpp, nfsd, nd_hash); 1139 } 1140 } 1141 splx(s); 1142 } 1143 1144 /* 1145 * Now, do VOP_WRITE()s for any one(s) that need to be done now 1146 * and generate the associated reply mbuf list(s). 1147 */ 1148 loop1: 1149 cur_usec = (u_quad_t)time.tv_sec * 1000000 + (u_quad_t)time.tv_usec; 1150 s = splsoftclock(); 1151 for (nfsd = LIST_FIRST(&slp->ns_tq); nfsd; nfsd = owp) { 1152 owp = LIST_NEXT(nfsd, nd_tq); 1153 if (nfsd->nd_time > cur_usec) 1154 break; 1155 if (nfsd->nd_mreq) 1156 continue; 1157 LIST_REMOVE(nfsd, nd_tq); 1158 LIST_REMOVE(nfsd, nd_hash); 1159 splx(s); 1160 mrep = nfsd->nd_mrep; 1161 nfsd->nd_mrep = NULL; 1162 cred = &nfsd->nd_cr; 1163 v3 = (nfsd->nd_flag & ND_NFSV3); 1164 forat_ret = aftat_ret = 1; 1165 error = nfsrv_fhtovp(&nfsd->nd_fh, 1, &vp, cred, slp, 1166 nfsd->nd_nam, &rdonly, (nfsd->nd_flag & ND_KERBAUTH), 1167 FALSE); 1168 if (!error) { 1169 if (v3) 1170 forat_ret = VOP_GETATTR(vp, &forat, cred, procp); 1171 if (vp->v_type != VREG) { 1172 if (v3) 1173 error = EINVAL; 1174 else 1175 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 1176 } 1177 } else 1178 vp = NULL; 1179 if (!error) { 1180 nqsrv_getl(vp, ND_WRITE); 1181 error = nfsrv_access(vp, VWRITE, cred, rdonly, procp, 1); 1182 } 1183 1184 if (nfsd->nd_stable == NFSV3WRITE_UNSTABLE) 1185 ioflags = IO_NODELOCKED; 1186 else if (nfsd->nd_stable == NFSV3WRITE_DATASYNC) 1187 ioflags = (IO_SYNC | IO_NODELOCKED); 1188 else 1189 ioflags = (IO_METASYNC | IO_SYNC | IO_NODELOCKED); 1190 uiop->uio_rw = UIO_WRITE; 1191 uiop->uio_segflg = UIO_SYSSPACE; 1192 uiop->uio_procp = (struct proc *)0; 1193 uiop->uio_offset = nfsd->nd_off; 1194 uiop->uio_resid = nfsd->nd_eoff - nfsd->nd_off; 1195 if (uiop->uio_resid > 0) { 1196 mp = mrep; 1197 i = 0; 1198 while (mp) { 1199 if (mp->m_len > 0) 1200 i++; 1201 mp = mp->m_next; 1202 } 1203 uiop->uio_iovcnt = i; 1204 iov = malloc(i * sizeof (struct iovec), M_TEMP, M_WAITOK); 1205 uiop->uio_iov = ivp = iov; 1206 mp = mrep; 1207 while (mp) { 1208 if (mp->m_len > 0) { 1209 ivp->iov_base = mtod(mp, caddr_t); 1210 ivp->iov_len = mp->m_len; 1211 ivp++; 1212 } 1213 mp = mp->m_next; 1214 } 1215 if (!error) { 1216 if (vn_start_write(vp, &mntp, V_NOWAIT) != 0) { 1217 VOP_UNLOCK(vp, 0); 1218 vn_start_write(NULL, &mntp, V_WAIT); 1219 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 1220 } 1221 if (!error) { 1222 error = VOP_WRITE(vp, uiop, ioflags, cred); 1223 nfsstats.srvvop_writes++; 1224 vn_finished_write(mntp, 0); 1225 } 1226 } 1227 free((caddr_t)iov, M_TEMP); 1228 } 1229 m_freem(mrep); 1230 if (vp) { 1231 aftat_ret = VOP_GETATTR(vp, &va, cred, procp); 1232 vput(vp); 1233 } 1234 1235 /* 1236 * Loop around generating replies for all write rpcs that have 1237 * now been completed. 1238 */ 1239 swp = nfsd; 1240 do { 1241 if (error) { 1242 nfsm_writereply(NFSX_WCCDATA(v3), v3); 1243 if (v3) { 1244 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1245 } 1246 } else { 1247 nfsm_writereply(NFSX_PREOPATTR(v3) + 1248 NFSX_POSTOPORFATTR(v3) + 2 * NFSX_UNSIGNED + 1249 NFSX_WRITEVERF(v3), v3); 1250 if (v3) { 1251 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1252 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1253 *tl++ = txdr_unsigned(nfsd->nd_len); 1254 *tl++ = txdr_unsigned(swp->nd_stable); 1255 /* 1256 * Actually, there is no need to txdr these fields, 1257 * but it may make the values more human readable, 1258 * for debugging purposes. 1259 */ 1260 *tl++ = txdr_unsigned(boottime.tv_sec); 1261 *tl = txdr_unsigned(boottime.tv_usec); 1262 } else { 1263 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 1264 nfsm_srvfillattr(&va, fp); 1265 } 1266 } 1267 nfsd->nd_mreq = mreq; 1268 if (nfsd->nd_mrep) 1269 panic("nfsrv_write: nd_mrep not free"); 1270 1271 /* 1272 * Done. Put it at the head of the timer queue so that 1273 * the final phase can return the reply. 1274 */ 1275 s = splsoftclock(); 1276 if (nfsd != swp) { 1277 nfsd->nd_time = 0; 1278 LIST_INSERT_HEAD(&slp->ns_tq, nfsd, nd_tq); 1279 } 1280 nfsd = LIST_FIRST(&swp->nd_coalesce); 1281 if (nfsd) { 1282 LIST_REMOVE(nfsd, nd_tq); 1283 } 1284 splx(s); 1285 } while (nfsd); 1286 s = splsoftclock(); 1287 swp->nd_time = 0; 1288 LIST_INSERT_HEAD(&slp->ns_tq, swp, nd_tq); 1289 splx(s); 1290 goto loop1; 1291 } 1292 splx(s); 1293 1294 /* 1295 * Search for a reply to return. 1296 */ 1297 s = splsoftclock(); 1298 LIST_FOREACH(nfsd, &slp->ns_tq, nd_tq) { 1299 if (nfsd->nd_mreq) { 1300 LIST_REMOVE(nfsd, nd_tq); 1301 *mrq = nfsd->nd_mreq; 1302 *ndp = nfsd; 1303 break; 1304 } 1305 } 1306 splx(s); 1307 return (0); 1308 } 1309 1310 /* 1311 * Coalesce the write request nfsd into owp. To do this we must: 1312 * - remove nfsd from the queues 1313 * - merge nfsd->nd_mrep into owp->nd_mrep 1314 * - update the nd_eoff and nd_stable for owp 1315 * - put nfsd on owp's nd_coalesce list 1316 * NB: Must be called at splsoftclock(). 1317 */ 1318 void 1319 nfsrvw_coalesce(owp, nfsd) 1320 struct nfsrv_descript *owp; 1321 struct nfsrv_descript *nfsd; 1322 { 1323 int overlap; 1324 struct mbuf *mp; 1325 struct nfsrv_descript *m; 1326 1327 LIST_REMOVE(nfsd, nd_hash); 1328 LIST_REMOVE(nfsd, nd_tq); 1329 if (owp->nd_eoff < nfsd->nd_eoff) { 1330 overlap = owp->nd_eoff - nfsd->nd_off; 1331 if (overlap < 0) 1332 panic("nfsrv_coalesce: bad off"); 1333 if (overlap > 0) 1334 m_adj(nfsd->nd_mrep, overlap); 1335 mp = owp->nd_mrep; 1336 while (mp->m_next) 1337 mp = mp->m_next; 1338 mp->m_next = nfsd->nd_mrep; 1339 owp->nd_eoff = nfsd->nd_eoff; 1340 } else 1341 m_freem(nfsd->nd_mrep); 1342 nfsd->nd_mrep = NULL; 1343 if (nfsd->nd_stable == NFSV3WRITE_FILESYNC) 1344 owp->nd_stable = NFSV3WRITE_FILESYNC; 1345 else if (nfsd->nd_stable == NFSV3WRITE_DATASYNC && 1346 owp->nd_stable == NFSV3WRITE_UNSTABLE) 1347 owp->nd_stable = NFSV3WRITE_DATASYNC; 1348 LIST_INSERT_HEAD(&owp->nd_coalesce, nfsd, nd_tq); 1349 /* 1350 * nfsd might hold coalesce elements! Move them to owp. 1351 * Otherwise, requests may be lost and clients will be stuck. 1352 */ 1353 while ((m = LIST_FIRST(&nfsd->nd_coalesce)) != NULL) { 1354 LIST_REMOVE(m, nd_tq); 1355 LIST_INSERT_HEAD(&owp->nd_coalesce, m, nd_tq); 1356 } 1357 } 1358 1359 /* 1360 * nfs create service 1361 * now does a truncate to 0 length via. setattr if it already exists 1362 */ 1363 int 1364 nfsrv_create(nfsd, slp, procp, mrq) 1365 struct nfsrv_descript *nfsd; 1366 struct nfssvc_sock *slp; 1367 struct proc *procp; 1368 struct mbuf **mrq; 1369 { 1370 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1371 struct mbuf *nam = nfsd->nd_nam; 1372 caddr_t dpos = nfsd->nd_dpos; 1373 struct ucred *cred = &nfsd->nd_cr; 1374 struct nfs_fattr *fp; 1375 struct vattr va, dirfor, diraft; 1376 struct nfsv2_sattr *sp; 1377 u_int32_t *tl; 1378 struct nameidata nd; 1379 caddr_t cp; 1380 int32_t t1; 1381 caddr_t bpos; 1382 int error = 0, cache, len, tsize, dirfor_ret = 1, diraft_ret = 1; 1383 int rdev = 0; 1384 int v3 = (nfsd->nd_flag & ND_NFSV3), how, exclusive_flag = 0; 1385 char *cp2; 1386 struct mbuf *mb, *mreq; 1387 struct vnode *vp = NULL, *dirp = NULL; 1388 nfsfh_t nfh; 1389 fhandle_t *fhp; 1390 u_quad_t frev, tempsize; 1391 u_char cverf[NFSX_V3CREATEVERF]; 1392 struct mount *mp = NULL; 1393 1394 nd.ni_cnd.cn_nameiop = 0; 1395 fhp = &nfh.fh_generic; 1396 nfsm_srvmtofh(fhp); 1397 if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) 1398 return (ESTALE); 1399 vn_start_write(NULL, &mp, V_WAIT); 1400 nfsm_srvnamesiz(len); 1401 nd.ni_cnd.cn_cred = cred; 1402 nd.ni_cnd.cn_nameiop = CREATE; 1403 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 1404 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 1405 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1406 if (dirp) { 1407 if (v3) 1408 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 1409 procp); 1410 else { 1411 vrele(dirp); 1412 dirp = (struct vnode *)0; 1413 } 1414 } 1415 if (error) { 1416 nfsm_reply(NFSX_WCCDATA(v3)); 1417 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1418 if (dirp) 1419 vrele(dirp); 1420 vn_finished_write(mp, 0); 1421 return (0); 1422 } 1423 VATTR_NULL(&va); 1424 if (v3) { 1425 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1426 how = fxdr_unsigned(int, *tl); 1427 switch (how) { 1428 case NFSV3CREATE_GUARDED: 1429 if (nd.ni_vp) { 1430 error = EEXIST; 1431 break; 1432 } 1433 case NFSV3CREATE_UNCHECKED: 1434 nfsm_srvsattr(&va); 1435 break; 1436 case NFSV3CREATE_EXCLUSIVE: 1437 nfsm_dissect(cp, caddr_t, NFSX_V3CREATEVERF); 1438 memcpy(cverf, cp, NFSX_V3CREATEVERF); 1439 exclusive_flag = 1; 1440 if (nd.ni_vp == NULL) 1441 va.va_mode = 0; 1442 break; 1443 }; 1444 va.va_type = VREG; 1445 } else { 1446 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1447 va.va_type = IFTOVT(fxdr_unsigned(u_int32_t, sp->sa_mode)); 1448 if (va.va_type == VNON) 1449 va.va_type = VREG; 1450 va.va_mode = nfstov_mode(sp->sa_mode); 1451 switch (va.va_type) { 1452 case VREG: 1453 tsize = fxdr_unsigned(int32_t, sp->sa_size); 1454 if (tsize != -1) 1455 va.va_size = (u_quad_t)tsize; 1456 break; 1457 case VCHR: 1458 case VBLK: 1459 case VFIFO: 1460 rdev = fxdr_unsigned(int32_t, sp->sa_size); 1461 break; 1462 default: 1463 break; 1464 }; 1465 } 1466 1467 /* 1468 * Iff doesn't exist, create it 1469 * otherwise just truncate to 0 length 1470 * should I set the mode too ?? 1471 */ 1472 if (nd.ni_vp == NULL) { 1473 if (va.va_type == VREG || va.va_type == VSOCK) { 1474 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1475 error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1476 if (!error) { 1477 if (exclusive_flag) { 1478 exclusive_flag = 0; 1479 VATTR_NULL(&va); 1480 /* 1481 * XXX 1482 * assuming NFSX_V3CREATEVERF 1483 * == sizeof(nfstime3) 1484 */ 1485 fxdr_nfsv3time(cverf, &va.va_atime); 1486 error = VOP_SETATTR(nd.ni_vp, &va, cred, 1487 procp); 1488 } 1489 } 1490 } else if (va.va_type == VCHR || va.va_type == VBLK || 1491 va.va_type == VFIFO) { 1492 if (va.va_type == VCHR && rdev == 0xffffffff) 1493 va.va_type = VFIFO; 1494 if (va.va_type != VFIFO && 1495 (error = suser(cred, (u_short *)0))) { 1496 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1497 vput(nd.ni_dvp); 1498 nfsm_reply(0); 1499 vn_finished_write(mp, 0); 1500 return (error); 1501 } else 1502 va.va_rdev = (dev_t)rdev; 1503 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1504 error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, 1505 &va); 1506 if (error) { 1507 nfsm_reply(0); 1508 } 1509 if (nd.ni_cnd.cn_flags & ISSYMLINK) { 1510 vrele(nd.ni_dvp); 1511 vput(nd.ni_vp); 1512 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1513 error = EINVAL; 1514 nfsm_reply(0); 1515 } 1516 } else { 1517 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1518 vput(nd.ni_dvp); 1519 error = ENXIO; 1520 } 1521 vp = nd.ni_vp; 1522 } else { 1523 vp = nd.ni_vp; 1524 if (nd.ni_dvp == vp) 1525 vrele(nd.ni_dvp); 1526 else 1527 vput(nd.ni_dvp); 1528 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1529 if (!error && va.va_size != -1) { 1530 error = nfsrv_access(vp, VWRITE, cred, 1531 (nd.ni_cnd.cn_flags & RDONLY), procp, 0); 1532 if (!error) { 1533 nqsrv_getl(vp, ND_WRITE); 1534 tempsize = va.va_size; 1535 VATTR_NULL(&va); 1536 va.va_size = tempsize; 1537 error = VOP_SETATTR(vp, &va, cred, 1538 procp); 1539 } 1540 } 1541 if (error) 1542 vput(vp); 1543 } 1544 if (!error) { 1545 memset((caddr_t)fhp, 0, sizeof(nfh)); 1546 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; 1547 error = VFS_VPTOFH(vp, &fhp->fh_fid); 1548 if (!error) 1549 error = VOP_GETATTR(vp, &va, cred, procp); 1550 vput(vp); 1551 } 1552 if (v3) { 1553 if (exclusive_flag && !error) { 1554 /* 1555 * XXX assuming NFSX_V3CREATEVERF == sizeof(nfstime3) 1556 */ 1557 char oldverf[NFSX_V3CREATEVERF]; 1558 1559 txdr_nfsv3time(&va.va_atime, oldverf); 1560 if (memcmp(cverf, oldverf, NFSX_V3CREATEVERF)) 1561 error = EEXIST; 1562 } 1563 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 1564 vrele(dirp); 1565 } 1566 nfsm_reply(NFSX_SRVFH(v3) + NFSX_FATTR(v3) + NFSX_WCCDATA(v3)); 1567 if (v3) { 1568 if (!error) { 1569 nfsm_srvpostop_fh(fhp); 1570 nfsm_srvpostop_attr(0, &va); 1571 } 1572 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1573 } else { 1574 nfsm_srvfhtom(fhp, v3); 1575 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 1576 nfsm_srvfillattr(&va, fp); 1577 } 1578 vn_finished_write(mp, 0); 1579 return (0); 1580 nfsmout: 1581 if (dirp) 1582 vrele(dirp); 1583 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1584 if (nd.ni_dvp == nd.ni_vp) 1585 vrele(nd.ni_dvp); 1586 else 1587 vput(nd.ni_dvp); 1588 if (nd.ni_vp) 1589 vput(nd.ni_vp); 1590 vn_finished_write(mp, 0); 1591 return (error); 1592 } 1593 1594 /* 1595 * nfs v3 mknod service 1596 */ 1597 int 1598 nfsrv_mknod(nfsd, slp, procp, mrq) 1599 struct nfsrv_descript *nfsd; 1600 struct nfssvc_sock *slp; 1601 struct proc *procp; 1602 struct mbuf **mrq; 1603 { 1604 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1605 struct mbuf *nam = nfsd->nd_nam; 1606 caddr_t dpos = nfsd->nd_dpos; 1607 struct ucred *cred = &nfsd->nd_cr; 1608 struct vattr va, dirfor, diraft; 1609 u_int32_t *tl; 1610 struct nameidata nd; 1611 int32_t t1; 1612 caddr_t bpos; 1613 int error = 0, cache, len, dirfor_ret = 1, diraft_ret = 1; 1614 u_int32_t major, minor; 1615 enum vtype vtyp; 1616 char *cp2; 1617 struct mbuf *mb, *mreq; 1618 struct vnode *vp, *dirp = (struct vnode *)0; 1619 nfsfh_t nfh; 1620 fhandle_t *fhp; 1621 u_quad_t frev; 1622 struct mount *mp = NULL; 1623 1624 nd.ni_cnd.cn_nameiop = 0; 1625 fhp = &nfh.fh_generic; 1626 nfsm_srvmtofh(fhp); 1627 if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) 1628 return (ESTALE); 1629 vn_start_write(NULL, &mp, V_WAIT); 1630 nfsm_srvnamesiz(len); 1631 nd.ni_cnd.cn_cred = cred; 1632 nd.ni_cnd.cn_nameiop = CREATE; 1633 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 1634 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 1635 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1636 if (dirp) 1637 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, procp); 1638 if (error) { 1639 nfsm_reply(NFSX_WCCDATA(1)); 1640 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1641 if (dirp) 1642 vrele(dirp); 1643 vn_finished_write(mp, 0); 1644 return (0); 1645 } 1646 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1647 vtyp = nfsv3tov_type(*tl); 1648 if (vtyp != VCHR && vtyp != VBLK && vtyp != VSOCK && vtyp != VFIFO) { 1649 error = NFSERR_BADTYPE; 1650 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1651 if (nd.ni_dvp == nd.ni_vp) 1652 vrele(nd.ni_dvp); 1653 else 1654 vput(nd.ni_dvp); 1655 if (nd.ni_vp) 1656 vput(nd.ni_vp); 1657 goto out; 1658 } 1659 VATTR_NULL(&va); 1660 nfsm_srvsattr(&va); 1661 if (vtyp == VCHR || vtyp == VBLK) { 1662 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1663 major = fxdr_unsigned(u_int32_t, *tl++); 1664 minor = fxdr_unsigned(u_int32_t, *tl); 1665 va.va_rdev = makedev(major, minor); 1666 } 1667 1668 /* 1669 * Iff doesn't exist, create it. 1670 */ 1671 if (nd.ni_vp) { 1672 error = EEXIST; 1673 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1674 if (nd.ni_dvp == nd.ni_vp) 1675 vrele(nd.ni_dvp); 1676 else 1677 vput(nd.ni_dvp); 1678 vput(nd.ni_vp); 1679 goto out; 1680 } 1681 va.va_type = vtyp; 1682 if (vtyp == VSOCK) { 1683 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1684 error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1685 } else { 1686 if (va.va_type != VFIFO && 1687 (error = suser(cred, (u_short *)0))) { 1688 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1689 vput(nd.ni_dvp); 1690 goto out; 1691 } 1692 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1693 error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1694 if (error) { 1695 goto out; 1696 } 1697 if (error) 1698 goto out; 1699 if (nd.ni_cnd.cn_flags & ISSYMLINK) { 1700 vput(nd.ni_vp); 1701 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1702 error = EINVAL; 1703 } 1704 } 1705 out: 1706 vp = nd.ni_vp; 1707 if (!error) { 1708 memset((caddr_t)fhp, 0, sizeof(nfh)); 1709 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; 1710 error = VFS_VPTOFH(vp, &fhp->fh_fid); 1711 if (!error) 1712 error = VOP_GETATTR(vp, &va, cred, procp); 1713 vput(vp); 1714 } 1715 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 1716 vrele(dirp); 1717 nfsm_reply(NFSX_SRVFH(1) + NFSX_POSTOPATTR(1) + NFSX_WCCDATA(1)); 1718 if (!error) { 1719 nfsm_srvpostop_fh(fhp); 1720 nfsm_srvpostop_attr(0, &va); 1721 } 1722 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1723 vn_finished_write(mp, 0); 1724 return (0); 1725 nfsmout: 1726 if (dirp) 1727 vrele(dirp); 1728 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1729 if (nd.ni_dvp == nd.ni_vp) 1730 vrele(nd.ni_dvp); 1731 else 1732 vput(nd.ni_dvp); 1733 if (nd.ni_vp) 1734 vput(nd.ni_vp); 1735 vn_finished_write(mp, 0); 1736 return (error); 1737 } 1738 1739 /* 1740 * nfs remove service 1741 */ 1742 int 1743 nfsrv_remove(nfsd, slp, procp, mrq) 1744 struct nfsrv_descript *nfsd; 1745 struct nfssvc_sock *slp; 1746 struct proc *procp; 1747 struct mbuf **mrq; 1748 { 1749 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1750 struct mbuf *nam = nfsd->nd_nam; 1751 caddr_t dpos = nfsd->nd_dpos; 1752 struct ucred *cred = &nfsd->nd_cr; 1753 struct nameidata nd; 1754 u_int32_t *tl; 1755 int32_t t1; 1756 caddr_t bpos; 1757 int error = 0, cache, len, dirfor_ret = 1, diraft_ret = 1; 1758 int v3 = (nfsd->nd_flag & ND_NFSV3); 1759 char *cp2; 1760 struct mbuf *mb, *mreq; 1761 struct vnode *vp, *dirp; 1762 struct vattr dirfor, diraft; 1763 nfsfh_t nfh; 1764 fhandle_t *fhp; 1765 u_quad_t frev; 1766 struct mount *mp = NULL; 1767 1768 #ifndef nolint 1769 vp = (struct vnode *)0; 1770 #endif 1771 fhp = &nfh.fh_generic; 1772 nfsm_srvmtofh(fhp); 1773 if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) 1774 return (ESTALE); 1775 vn_start_write(NULL, &mp, V_WAIT); 1776 nfsm_srvnamesiz(len); 1777 nd.ni_cnd.cn_cred = cred; 1778 nd.ni_cnd.cn_nameiop = DELETE; 1779 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 1780 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 1781 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1782 if (dirp) { 1783 if (v3) 1784 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 1785 procp); 1786 else 1787 vrele(dirp); 1788 } 1789 if (!error) { 1790 vp = nd.ni_vp; 1791 if (vp->v_type == VDIR && 1792 (error = suser(cred, (u_short *)0)) != 0) 1793 goto out; 1794 /* 1795 * The root of a mounted filesystem cannot be deleted. 1796 */ 1797 if (vp->v_flag & VROOT) { 1798 error = EBUSY; 1799 goto out; 1800 } 1801 out: 1802 if (!error) { 1803 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1804 nqsrv_getl(vp, ND_WRITE); 1805 error = VOP_REMOVE(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); 1806 } else { 1807 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1808 if (nd.ni_dvp == vp) 1809 vrele(nd.ni_dvp); 1810 else 1811 vput(nd.ni_dvp); 1812 vput(vp); 1813 } 1814 } 1815 if (dirp && v3) { 1816 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 1817 vrele(dirp); 1818 } 1819 nfsm_reply(NFSX_WCCDATA(v3)); 1820 if (v3) { 1821 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1822 vn_finished_write(mp, 0); 1823 return (0); 1824 } 1825 vn_finished_write(mp, 0); 1826 nfsm_srvdone; 1827 } 1828 1829 /* 1830 * nfs rename service 1831 */ 1832 int 1833 nfsrv_rename(nfsd, slp, procp, mrq) 1834 struct nfsrv_descript *nfsd; 1835 struct nfssvc_sock *slp; 1836 struct proc *procp; 1837 struct mbuf **mrq; 1838 { 1839 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1840 struct mbuf *nam = nfsd->nd_nam; 1841 caddr_t dpos = nfsd->nd_dpos; 1842 struct ucred *cred = &nfsd->nd_cr; 1843 u_int32_t *tl; 1844 int32_t t1; 1845 caddr_t bpos; 1846 int error = 0, cache, fdirfor_ret = 1, fdiraft_ret = 1; 1847 uint32_t len, len2; 1848 int tdirfor_ret = 1, tdiraft_ret = 1; 1849 int v3 = (nfsd->nd_flag & ND_NFSV3); 1850 char *cp2; 1851 struct mbuf *mb, *mreq; 1852 struct nameidata fromnd, tond; 1853 struct vnode *fvp, *tvp, *tdvp, *fdirp = (struct vnode *)0; 1854 struct vnode *tdirp = (struct vnode *)0; 1855 struct vattr fdirfor, fdiraft, tdirfor, tdiraft; 1856 nfsfh_t fnfh, tnfh; 1857 fhandle_t *ffhp, *tfhp; 1858 u_quad_t frev; 1859 uid_t saved_uid; 1860 struct mount *mp = NULL; 1861 1862 #ifndef nolint 1863 fvp = (struct vnode *)0; 1864 #endif 1865 ffhp = &fnfh.fh_generic; 1866 tfhp = &tnfh.fh_generic; 1867 fromnd.ni_cnd.cn_nameiop = 0; 1868 tond.ni_cnd.cn_nameiop = 0; 1869 nfsm_srvmtofh(ffhp); 1870 if ((mp = vfs_getvfs(&ffhp->fh_fsid)) == NULL) 1871 return (ESTALE); 1872 vn_start_write(NULL, &mp, V_WAIT); 1873 nfsm_srvnamesiz(len); 1874 /* 1875 * Remember our original uid so that we can reset cr_uid before 1876 * the second nfs_namei() call, in case it is remapped. 1877 */ 1878 saved_uid = cred->cr_uid; 1879 fromnd.ni_cnd.cn_cred = cred; 1880 fromnd.ni_cnd.cn_nameiop = DELETE; 1881 fromnd.ni_cnd.cn_flags = WANTPARENT | SAVESTART; 1882 error = nfs_namei(&fromnd, ffhp, len, slp, nam, &md, 1883 &dpos, &fdirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1884 if (fdirp) { 1885 if (v3) 1886 fdirfor_ret = VOP_GETATTR(fdirp, &fdirfor, cred, 1887 procp); 1888 else { 1889 vrele(fdirp); 1890 fdirp = (struct vnode *)0; 1891 } 1892 } 1893 if (error) { 1894 nfsm_reply(2 * NFSX_WCCDATA(v3)); 1895 nfsm_srvwcc_data(fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft); 1896 nfsm_srvwcc_data(tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft); 1897 if (fdirp) 1898 vrele(fdirp); 1899 vn_finished_write(mp, 0); 1900 return (0); 1901 } 1902 fvp = fromnd.ni_vp; 1903 nfsm_srvmtofh(tfhp); 1904 if (v3) { 1905 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 1906 len2 = fxdr_unsigned(uint32_t, *tl); 1907 /* len2 will be checked by nfs_namei */ 1908 } 1909 else { 1910 /* NFSv2 */ 1911 nfsm_strsiz(len2, NFS_MAXNAMLEN); 1912 } 1913 cred->cr_uid = saved_uid; 1914 tond.ni_cnd.cn_cred = cred; 1915 tond.ni_cnd.cn_nameiop = RENAME; 1916 tond.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF | NOCACHE | SAVESTART; 1917 error = nfs_namei(&tond, tfhp, len2, slp, nam, &md, 1918 &dpos, &tdirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1919 if (tdirp) { 1920 if (v3) 1921 tdirfor_ret = VOP_GETATTR(tdirp, &tdirfor, cred, 1922 procp); 1923 else { 1924 vrele(tdirp); 1925 tdirp = (struct vnode *)0; 1926 } 1927 } 1928 if (error) { 1929 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 1930 vrele(fromnd.ni_dvp); 1931 vrele(fvp); 1932 goto out1; 1933 } 1934 tdvp = tond.ni_dvp; 1935 tvp = tond.ni_vp; 1936 if (tvp != NULL) { 1937 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 1938 if (v3) 1939 error = EEXIST; 1940 else 1941 error = EISDIR; 1942 goto out; 1943 } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 1944 if (v3) 1945 error = EEXIST; 1946 else 1947 error = ENOTDIR; 1948 goto out; 1949 } 1950 if (tvp->v_type == VDIR && tvp->v_mountedhere) { 1951 if (v3) 1952 error = EXDEV; 1953 else 1954 error = ENOTEMPTY; 1955 goto out; 1956 } 1957 } 1958 if (fvp->v_type == VDIR && fvp->v_mountedhere) { 1959 if (v3) 1960 error = EXDEV; 1961 else 1962 error = ENOTEMPTY; 1963 goto out; 1964 } 1965 if (fvp->v_mount != tdvp->v_mount) { 1966 if (v3) 1967 error = EXDEV; 1968 else 1969 error = ENOTEMPTY; 1970 goto out; 1971 } 1972 if (fvp == tdvp) { 1973 if (v3) 1974 error = EINVAL; 1975 else 1976 error = ENOTEMPTY; 1977 } 1978 /* 1979 * If source is the same as the destination (that is the 1980 * same vnode with the same name in the same directory), 1981 * then there is nothing to do. 1982 */ 1983 if (fvp == tvp && fromnd.ni_dvp == tdvp && 1984 fromnd.ni_cnd.cn_namelen == tond.ni_cnd.cn_namelen && 1985 !memcmp(fromnd.ni_cnd.cn_nameptr, tond.ni_cnd.cn_nameptr, 1986 fromnd.ni_cnd.cn_namelen)) 1987 error = -1; 1988 out: 1989 if (!error) { 1990 nqsrv_getl(fromnd.ni_dvp, ND_WRITE); 1991 nqsrv_getl(tdvp, ND_WRITE); 1992 if (tvp) { 1993 nqsrv_getl(tvp, ND_WRITE); 1994 } 1995 error = VOP_RENAME(fromnd.ni_dvp, fromnd.ni_vp, &fromnd.ni_cnd, 1996 tond.ni_dvp, tond.ni_vp, &tond.ni_cnd); 1997 } else { 1998 VOP_ABORTOP(tond.ni_dvp, &tond.ni_cnd); 1999 if (tdvp == tvp) 2000 vrele(tdvp); 2001 else 2002 vput(tdvp); 2003 if (tvp) 2004 vput(tvp); 2005 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 2006 vrele(fromnd.ni_dvp); 2007 vrele(fvp); 2008 if (error == -1) 2009 error = 0; 2010 } 2011 vrele(tond.ni_startdir); 2012 PNBUF_PUT(tond.ni_cnd.cn_pnbuf); 2013 out1: 2014 if (fdirp) { 2015 fdiraft_ret = VOP_GETATTR(fdirp, &fdiraft, cred, procp); 2016 vrele(fdirp); 2017 } 2018 if (tdirp) { 2019 tdiraft_ret = VOP_GETATTR(tdirp, &tdiraft, cred, procp); 2020 vrele(tdirp); 2021 } 2022 vrele(fromnd.ni_startdir); 2023 PNBUF_PUT(fromnd.ni_cnd.cn_pnbuf); 2024 nfsm_reply(2 * NFSX_WCCDATA(v3)); 2025 if (v3) { 2026 nfsm_srvwcc_data(fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft); 2027 nfsm_srvwcc_data(tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft); 2028 } 2029 vn_finished_write(mp, 0); 2030 return (0); 2031 2032 nfsmout: 2033 if (fdirp) 2034 vrele(fdirp); 2035 if (tdirp) 2036 vrele(tdirp); 2037 if (tond.ni_cnd.cn_nameiop) { 2038 vrele(tond.ni_startdir); 2039 PNBUF_PUT(tond.ni_cnd.cn_pnbuf); 2040 } 2041 if (fromnd.ni_cnd.cn_nameiop) { 2042 vrele(fromnd.ni_startdir); 2043 PNBUF_PUT(fromnd.ni_cnd.cn_pnbuf); 2044 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 2045 vrele(fromnd.ni_dvp); 2046 vrele(fvp); 2047 } 2048 return (error); 2049 } 2050 2051 /* 2052 * nfs link service 2053 */ 2054 int 2055 nfsrv_link(nfsd, slp, procp, mrq) 2056 struct nfsrv_descript *nfsd; 2057 struct nfssvc_sock *slp; 2058 struct proc *procp; 2059 struct mbuf **mrq; 2060 { 2061 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2062 struct mbuf *nam = nfsd->nd_nam; 2063 caddr_t dpos = nfsd->nd_dpos; 2064 struct ucred *cred = &nfsd->nd_cr; 2065 struct nameidata nd; 2066 u_int32_t *tl; 2067 int32_t t1; 2068 caddr_t bpos; 2069 int error = 0, rdonly, cache, len, dirfor_ret = 1, diraft_ret = 1; 2070 int getret = 1, v3 = (nfsd->nd_flag & ND_NFSV3); 2071 char *cp2; 2072 struct mbuf *mb, *mreq; 2073 struct vnode *vp, *xp, *dirp = (struct vnode *)0; 2074 struct vattr dirfor, diraft, at; 2075 nfsfh_t nfh, dnfh; 2076 fhandle_t *fhp, *dfhp; 2077 u_quad_t frev; 2078 struct mount *mp = NULL; 2079 2080 fhp = &nfh.fh_generic; 2081 dfhp = &dnfh.fh_generic; 2082 nfsm_srvmtofh(fhp); 2083 if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) 2084 return (ESTALE); 2085 vn_start_write(NULL, &mp, V_WAIT); 2086 nfsm_srvmtofh(dfhp); 2087 nfsm_srvnamesiz(len); 2088 error = nfsrv_fhtovp(fhp, FALSE, &vp, cred, slp, nam, 2089 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2090 if (error) { 2091 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2092 nfsm_srvpostop_attr(getret, &at); 2093 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2094 vn_finished_write(mp, 0); 2095 return (0); 2096 } 2097 if (vp->v_type == VDIR && (error = suser(cred, (u_short *)0)) != 0) 2098 goto out1; 2099 nd.ni_cnd.cn_cred = cred; 2100 nd.ni_cnd.cn_nameiop = CREATE; 2101 nd.ni_cnd.cn_flags = LOCKPARENT; 2102 error = nfs_namei(&nd, dfhp, len, slp, nam, &md, &dpos, 2103 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2104 if (dirp) { 2105 if (v3) 2106 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 2107 procp); 2108 else { 2109 vrele(dirp); 2110 dirp = (struct vnode *)0; 2111 } 2112 } 2113 if (error) 2114 goto out1; 2115 xp = nd.ni_vp; 2116 if (xp != NULL) { 2117 error = EEXIST; 2118 goto out; 2119 } 2120 xp = nd.ni_dvp; 2121 if (vp->v_mount != xp->v_mount) 2122 error = EXDEV; 2123 out: 2124 if (!error) { 2125 nqsrv_getl(vp, ND_WRITE); 2126 nqsrv_getl(xp, ND_WRITE); 2127 error = VOP_LINK(nd.ni_dvp, vp, &nd.ni_cnd); 2128 } else { 2129 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2130 if (nd.ni_dvp == nd.ni_vp) 2131 vrele(nd.ni_dvp); 2132 else 2133 vput(nd.ni_dvp); 2134 if (nd.ni_vp) 2135 vrele(nd.ni_vp); 2136 } 2137 out1: 2138 if (v3) 2139 getret = VOP_GETATTR(vp, &at, cred, procp); 2140 if (dirp) { 2141 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 2142 vrele(dirp); 2143 } 2144 vrele(vp); 2145 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2146 if (v3) { 2147 nfsm_srvpostop_attr(getret, &at); 2148 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2149 vn_finished_write(mp, 0); 2150 return (0); 2151 } 2152 vn_finished_write(mp, 0); 2153 nfsm_srvdone; 2154 } 2155 2156 /* 2157 * nfs symbolic link service 2158 */ 2159 int 2160 nfsrv_symlink(nfsd, slp, procp, mrq) 2161 struct nfsrv_descript *nfsd; 2162 struct nfssvc_sock *slp; 2163 struct proc *procp; 2164 struct mbuf **mrq; 2165 { 2166 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2167 struct mbuf *nam = nfsd->nd_nam; 2168 caddr_t dpos = nfsd->nd_dpos; 2169 struct ucred *cred = &nfsd->nd_cr; 2170 struct vattr va, dirfor, diraft; 2171 struct nameidata nd; 2172 u_int32_t *tl; 2173 int32_t t1; 2174 struct nfsv2_sattr *sp; 2175 char *bpos, *pathcp = NULL, *cp2; 2176 struct uio io; 2177 struct iovec iv; 2178 int error = 0, cache, dirfor_ret = 1, diraft_ret = 1; 2179 uint32_t len, len2; 2180 int v3 = (nfsd->nd_flag & ND_NFSV3); 2181 struct mbuf *mb, *mreq; 2182 struct vnode *dirp = (struct vnode *)0; 2183 nfsfh_t nfh; 2184 fhandle_t *fhp; 2185 u_quad_t frev; 2186 struct mount *mp = NULL; 2187 2188 nd.ni_cnd.cn_nameiop = 0; 2189 fhp = &nfh.fh_generic; 2190 nfsm_srvmtofh(fhp); 2191 if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) 2192 return (ESTALE); 2193 vn_start_write(NULL, &mp, V_WAIT); 2194 nfsm_srvnamesiz(len); 2195 nd.ni_cnd.cn_cred = cred; 2196 nd.ni_cnd.cn_nameiop = CREATE; 2197 nd.ni_cnd.cn_flags = LOCKPARENT; 2198 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 2199 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2200 if (dirp) { 2201 if (v3) 2202 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 2203 procp); 2204 else { 2205 vrele(dirp); 2206 dirp = (struct vnode *)0; 2207 } 2208 } 2209 if (error) 2210 goto out; 2211 VATTR_NULL(&va); 2212 if (v3) { 2213 nfsm_srvsattr(&va); 2214 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 2215 len2 = fxdr_unsigned(uint32_t, *tl); 2216 if (len2 > PATH_MAX) { 2217 /* XXX should check _PC_NO_TRUNC */ 2218 error = ENAMETOOLONG; 2219 goto abortop; 2220 } 2221 } 2222 else { 2223 /* NFSv2 */ 2224 nfsm_strsiz(len2, NFS_MAXPATHLEN); 2225 } 2226 pathcp = malloc(len2 + 1, M_TEMP, M_WAITOK); 2227 iv.iov_base = pathcp; 2228 iv.iov_len = len2; 2229 io.uio_resid = len2; 2230 io.uio_offset = 0; 2231 io.uio_iov = &iv; 2232 io.uio_iovcnt = 1; 2233 io.uio_segflg = UIO_SYSSPACE; 2234 io.uio_rw = UIO_READ; 2235 io.uio_procp = (struct proc *)0; 2236 nfsm_mtouio(&io, len2); 2237 if (!v3) { 2238 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2239 va.va_mode = fxdr_unsigned(u_int16_t, sp->sa_mode); 2240 } 2241 *(pathcp + len2) = '\0'; 2242 if (nd.ni_vp) { 2243 error = EEXIST; 2244 abortop: 2245 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2246 if (nd.ni_dvp == nd.ni_vp) 2247 vrele(nd.ni_dvp); 2248 else 2249 vput(nd.ni_dvp); 2250 if (nd.ni_vp) 2251 vrele(nd.ni_vp); 2252 goto out; 2253 } 2254 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2255 error = VOP_SYMLINK(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va, pathcp); 2256 if (!error) { 2257 if (v3) { 2258 memset((caddr_t)fhp, 0, sizeof(nfh)); 2259 fhp->fh_fsid = nd.ni_vp->v_mount->mnt_stat.f_fsid; 2260 error = VFS_VPTOFH(nd.ni_vp, &fhp->fh_fid); 2261 if (!error) 2262 error = VOP_GETATTR(nd.ni_vp, &va, cred, 2263 procp); 2264 vput(nd.ni_vp); 2265 } else { 2266 vput(nd.ni_vp); 2267 } 2268 } 2269 out: 2270 if (pathcp) 2271 free(pathcp, M_TEMP); 2272 if (dirp) { 2273 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 2274 vrele(dirp); 2275 } 2276 nfsm_reply(NFSX_SRVFH(v3) + NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2277 if (v3) { 2278 if (!error) { 2279 nfsm_srvpostop_fh(fhp); 2280 nfsm_srvpostop_attr(0, &va); 2281 } 2282 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2283 } 2284 vn_finished_write(mp, 0); 2285 return (0); 2286 nfsmout: 2287 if (dirp) 2288 vrele(dirp); 2289 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2290 if (nd.ni_dvp == nd.ni_vp) 2291 vrele(nd.ni_dvp); 2292 else 2293 vput(nd.ni_dvp); 2294 if (nd.ni_vp) 2295 vrele(nd.ni_vp); 2296 if (pathcp) 2297 free(pathcp, M_TEMP); 2298 vn_finished_write(mp, 0); 2299 return (error); 2300 } 2301 2302 /* 2303 * nfs mkdir service 2304 */ 2305 int 2306 nfsrv_mkdir(nfsd, slp, procp, mrq) 2307 struct nfsrv_descript *nfsd; 2308 struct nfssvc_sock *slp; 2309 struct proc *procp; 2310 struct mbuf **mrq; 2311 { 2312 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2313 struct mbuf *nam = nfsd->nd_nam; 2314 caddr_t dpos = nfsd->nd_dpos; 2315 struct ucred *cred = &nfsd->nd_cr; 2316 struct vattr va, dirfor, diraft; 2317 struct nfs_fattr *fp; 2318 struct nameidata nd; 2319 caddr_t cp; 2320 u_int32_t *tl; 2321 int32_t t1; 2322 caddr_t bpos; 2323 int error = 0, cache, len, dirfor_ret = 1, diraft_ret = 1; 2324 int v3 = (nfsd->nd_flag & ND_NFSV3); 2325 char *cp2; 2326 struct mbuf *mb, *mreq; 2327 struct vnode *vp, *dirp = (struct vnode *)0; 2328 nfsfh_t nfh; 2329 fhandle_t *fhp; 2330 u_quad_t frev; 2331 struct mount *mp = NULL; 2332 2333 fhp = &nfh.fh_generic; 2334 nfsm_srvmtofh(fhp); 2335 if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) 2336 return (ESTALE); 2337 vn_start_write(NULL, &mp, V_WAIT); 2338 nfsm_srvnamesiz(len); 2339 nd.ni_cnd.cn_cred = cred; 2340 nd.ni_cnd.cn_nameiop = CREATE; 2341 nd.ni_cnd.cn_flags = LOCKPARENT; 2342 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 2343 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2344 if (dirp) { 2345 if (v3) 2346 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 2347 procp); 2348 else { 2349 vrele(dirp); 2350 dirp = (struct vnode *)0; 2351 } 2352 } 2353 if (error) { 2354 nfsm_reply(NFSX_WCCDATA(v3)); 2355 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2356 if (dirp) 2357 vrele(dirp); 2358 vn_finished_write(mp, 0); 2359 return (0); 2360 } 2361 VATTR_NULL(&va); 2362 if (v3) { 2363 nfsm_srvsattr(&va); 2364 } else { 2365 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2366 va.va_mode = nfstov_mode(*tl++); 2367 } 2368 va.va_type = VDIR; 2369 vp = nd.ni_vp; 2370 if (vp != NULL) { 2371 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2372 if (nd.ni_dvp == vp) 2373 vrele(nd.ni_dvp); 2374 else 2375 vput(nd.ni_dvp); 2376 vrele(vp); 2377 error = EEXIST; 2378 goto out; 2379 } 2380 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2381 error = VOP_MKDIR(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 2382 if (!error) { 2383 vp = nd.ni_vp; 2384 memset((caddr_t)fhp, 0, sizeof(nfh)); 2385 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; 2386 error = VFS_VPTOFH(vp, &fhp->fh_fid); 2387 if (!error) 2388 error = VOP_GETATTR(vp, &va, cred, procp); 2389 vput(vp); 2390 } 2391 out: 2392 if (dirp) { 2393 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 2394 vrele(dirp); 2395 } 2396 nfsm_reply(NFSX_SRVFH(v3) + NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2397 if (v3) { 2398 if (!error) { 2399 nfsm_srvpostop_fh(fhp); 2400 nfsm_srvpostop_attr(0, &va); 2401 } 2402 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2403 } else { 2404 nfsm_srvfhtom(fhp, v3); 2405 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 2406 nfsm_srvfillattr(&va, fp); 2407 } 2408 vn_finished_write(mp, 0); 2409 return (0); 2410 nfsmout: 2411 if (dirp) 2412 vrele(dirp); 2413 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2414 if (nd.ni_dvp == nd.ni_vp) 2415 vrele(nd.ni_dvp); 2416 else 2417 vput(nd.ni_dvp); 2418 if (nd.ni_vp) 2419 vrele(nd.ni_vp); 2420 vn_finished_write(mp, 0); 2421 return (error); 2422 } 2423 2424 /* 2425 * nfs rmdir service 2426 */ 2427 int 2428 nfsrv_rmdir(nfsd, slp, procp, mrq) 2429 struct nfsrv_descript *nfsd; 2430 struct nfssvc_sock *slp; 2431 struct proc *procp; 2432 struct mbuf **mrq; 2433 { 2434 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2435 struct mbuf *nam = nfsd->nd_nam; 2436 caddr_t dpos = nfsd->nd_dpos; 2437 struct ucred *cred = &nfsd->nd_cr; 2438 u_int32_t *tl; 2439 int32_t t1; 2440 caddr_t bpos; 2441 int error = 0, cache, len, dirfor_ret = 1, diraft_ret = 1; 2442 int v3 = (nfsd->nd_flag & ND_NFSV3); 2443 char *cp2; 2444 struct mbuf *mb, *mreq; 2445 struct vnode *vp, *dirp = (struct vnode *)0; 2446 struct vattr dirfor, diraft; 2447 nfsfh_t nfh; 2448 fhandle_t *fhp; 2449 struct nameidata nd; 2450 u_quad_t frev; 2451 struct mount *mp = NULL; 2452 2453 fhp = &nfh.fh_generic; 2454 nfsm_srvmtofh(fhp); 2455 if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) 2456 return (ESTALE); 2457 vn_start_write(NULL, &mp, V_WAIT); 2458 nfsm_srvnamesiz(len); 2459 nd.ni_cnd.cn_cred = cred; 2460 nd.ni_cnd.cn_nameiop = DELETE; 2461 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 2462 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 2463 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2464 if (dirp) { 2465 if (v3) 2466 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 2467 procp); 2468 else { 2469 vrele(dirp); 2470 dirp = (struct vnode *)0; 2471 } 2472 } 2473 if (error) { 2474 nfsm_reply(NFSX_WCCDATA(v3)); 2475 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2476 if (dirp) 2477 vrele(dirp); 2478 vn_finished_write(mp, 0); 2479 return (0); 2480 } 2481 vp = nd.ni_vp; 2482 if (vp->v_type != VDIR) { 2483 error = ENOTDIR; 2484 goto out; 2485 } 2486 /* 2487 * No rmdir "." please. 2488 */ 2489 if (nd.ni_dvp == vp) { 2490 error = EINVAL; 2491 goto out; 2492 } 2493 /* 2494 * The root of a mounted filesystem cannot be deleted. 2495 */ 2496 if (vp->v_flag & VROOT) 2497 error = EBUSY; 2498 out: 2499 if (!error) { 2500 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2501 nqsrv_getl(vp, ND_WRITE); 2502 error = VOP_RMDIR(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); 2503 } else { 2504 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2505 if (nd.ni_dvp == nd.ni_vp) 2506 vrele(nd.ni_dvp); 2507 else 2508 vput(nd.ni_dvp); 2509 vput(vp); 2510 } 2511 if (dirp) { 2512 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 2513 vrele(dirp); 2514 } 2515 nfsm_reply(NFSX_WCCDATA(v3)); 2516 if (v3) { 2517 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2518 vn_finished_write(mp, 0); 2519 return (0); 2520 } 2521 vn_finished_write(mp, 0); 2522 nfsm_srvdone; 2523 } 2524 2525 /* 2526 * nfs readdir service 2527 * - mallocs what it thinks is enough to read 2528 * count rounded up to a multiple of NFS_DIRBLKSIZ <= NFS_MAXREADDIR 2529 * - calls VOP_READDIR() 2530 * - loops around building the reply 2531 * if the output generated exceeds count break out of loop 2532 * The nfsm_clget macro is used here so that the reply will be packed 2533 * tightly in mbuf clusters. 2534 * - it only knows that it has encountered eof when the VOP_READDIR() 2535 * reads nothing 2536 * - as such one readdir rpc will return eof false although you are there 2537 * and then the next will return eof 2538 * - it trims out records with d_fileno == 0 2539 * this doesn't matter for Unix clients, but they might confuse clients 2540 * for other os'. 2541 * - it trims out records with d_type == DT_WHT 2542 * these cannot be seen through NFS (unless we extend the protocol) 2543 * NB: It is tempting to set eof to true if the VOP_READDIR() reads less 2544 * than requested, but this may not apply to all filesystems. For 2545 * example, client NFS does not { although it is never remote mounted 2546 * anyhow } 2547 * The alternate call nfsrv_readdirplus() does lookups as well. 2548 * PS: The NFS protocol spec. does not clarify what the "count" byte 2549 * argument is a count of.. just name strings and file id's or the 2550 * entire reply rpc or ... 2551 * I tried just file name and id sizes and it confused the Sun client, 2552 * so I am using the full rpc size now. The "paranoia.." comment refers 2553 * to including the status longwords that are not a part of the dir. 2554 * "entry" structures, but are in the rpc. 2555 */ 2556 struct flrep { 2557 nfsuint64 fl_off; 2558 u_int32_t fl_postopok; 2559 u_int32_t fl_fattr[NFSX_V3FATTR / sizeof (u_int32_t)]; 2560 u_int32_t fl_fhok; 2561 u_int32_t fl_fhsize; 2562 u_int32_t fl_nfh[NFSX_V3FH / sizeof (u_int32_t)]; 2563 }; 2564 2565 int 2566 nfsrv_readdir(nfsd, slp, procp, mrq) 2567 struct nfsrv_descript *nfsd; 2568 struct nfssvc_sock *slp; 2569 struct proc *procp; 2570 struct mbuf **mrq; 2571 { 2572 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2573 struct mbuf *nam = nfsd->nd_nam; 2574 caddr_t dpos = nfsd->nd_dpos; 2575 struct ucred *cred = &nfsd->nd_cr; 2576 char *bp, *be; 2577 struct mbuf *mp; 2578 struct dirent *dp; 2579 caddr_t cp; 2580 u_int32_t *tl; 2581 int32_t t1; 2582 caddr_t bpos; 2583 struct mbuf *mb, *mreq, *mp2; 2584 char *cpos, *cend, *cp2, *rbuf; 2585 struct vnode *vp; 2586 struct vattr at; 2587 nfsfh_t nfh; 2588 fhandle_t *fhp; 2589 struct uio io; 2590 struct iovec iv; 2591 int len, nlen, rem, xfer, tsiz, i, error = 0, getret = 1; 2592 int siz, cnt, fullsiz, eofflag, rdonly, cache, ncookies; 2593 int v3 = (nfsd->nd_flag & ND_NFSV3); 2594 u_quad_t frev, off, toff, verf; 2595 off_t *cookies = NULL, *cookiep; 2596 nfsuint64 jar; 2597 2598 fhp = &nfh.fh_generic; 2599 nfsm_srvmtofh(fhp); 2600 if (v3) { 2601 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 2602 toff = fxdr_hyper(tl); 2603 tl += 2; 2604 verf = fxdr_hyper(tl); 2605 tl += 2; 2606 } else { 2607 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2608 toff = fxdr_unsigned(u_quad_t, *tl++); 2609 } 2610 off = toff; 2611 cnt = fxdr_unsigned(int, *tl); 2612 siz = ((cnt + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1)); 2613 xfer = NFS_SRVMAXDATA(nfsd); 2614 if (siz > xfer) 2615 siz = xfer; 2616 fullsiz = siz; 2617 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 2618 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2619 if (!error && vp->v_type != VDIR) { 2620 error = ENOTDIR; 2621 vput(vp); 2622 } 2623 if (error) { 2624 nfsm_reply(NFSX_UNSIGNED); 2625 nfsm_srvpostop_attr(getret, &at); 2626 return (0); 2627 } 2628 nqsrv_getl(vp, ND_READ); 2629 if (v3) { 2630 error = getret = VOP_GETATTR(vp, &at, cred, procp); 2631 #ifdef NFS3_STRICTVERF 2632 /* 2633 * XXX This check is too strict for Solaris 2.5 clients. 2634 */ 2635 if (!error && toff && verf != at.va_filerev) 2636 error = NFSERR_BAD_COOKIE; 2637 #endif 2638 } 2639 if (!error) 2640 error = nfsrv_access(vp, VEXEC, cred, rdonly, procp, 0); 2641 if (error) { 2642 vput(vp); 2643 nfsm_reply(NFSX_POSTOPATTR(v3)); 2644 nfsm_srvpostop_attr(getret, &at); 2645 return (0); 2646 } 2647 VOP_UNLOCK(vp, 0); 2648 rbuf = malloc(siz, M_TEMP, M_WAITOK); 2649 again: 2650 iv.iov_base = rbuf; 2651 iv.iov_len = fullsiz; 2652 io.uio_iov = &iv; 2653 io.uio_iovcnt = 1; 2654 io.uio_offset = (off_t)off; 2655 io.uio_resid = fullsiz; 2656 io.uio_segflg = UIO_SYSSPACE; 2657 io.uio_rw = UIO_READ; 2658 io.uio_procp = (struct proc *)0; 2659 eofflag = 0; 2660 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2661 2662 error = VOP_READDIR(vp, &io, cred, &eofflag, &cookies, &ncookies); 2663 2664 off = (off_t)io.uio_offset; 2665 if (!cookies && !error) 2666 error = NFSERR_PERM; 2667 if (v3) { 2668 getret = VOP_GETATTR(vp, &at, cred, procp); 2669 if (!error) 2670 error = getret; 2671 } 2672 2673 VOP_UNLOCK(vp, 0); 2674 if (error) { 2675 vrele(vp); 2676 free((caddr_t)rbuf, M_TEMP); 2677 if (cookies) 2678 free((caddr_t)cookies, M_TEMP); 2679 nfsm_reply(NFSX_POSTOPATTR(v3)); 2680 nfsm_srvpostop_attr(getret, &at); 2681 return (0); 2682 } 2683 if (io.uio_resid) { 2684 siz -= io.uio_resid; 2685 2686 /* 2687 * If nothing read, return eof 2688 * rpc reply 2689 */ 2690 if (siz == 0) { 2691 vrele(vp); 2692 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_COOKIEVERF(v3) + 2693 2 * NFSX_UNSIGNED); 2694 if (v3) { 2695 nfsm_srvpostop_attr(getret, &at); 2696 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 2697 txdr_hyper(at.va_filerev, tl); 2698 tl += 2; 2699 } else 2700 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2701 *tl++ = nfs_false; 2702 *tl = nfs_true; 2703 free((caddr_t)rbuf, M_TEMP); 2704 free((caddr_t)cookies, M_TEMP); 2705 return (0); 2706 } 2707 } 2708 2709 /* 2710 * Check for degenerate cases of nothing useful read. 2711 * If so go try again 2712 */ 2713 cpos = rbuf; 2714 cend = rbuf + siz; 2715 dp = (struct dirent *)cpos; 2716 cookiep = cookies; 2717 2718 while (cpos < cend && ncookies > 0 && 2719 (dp->d_fileno == 0 || dp->d_type == DT_WHT)) { 2720 cpos += dp->d_reclen; 2721 dp = (struct dirent *)cpos; 2722 cookiep++; 2723 ncookies--; 2724 } 2725 if (cpos >= cend || ncookies == 0) { 2726 toff = off; 2727 siz = fullsiz; 2728 goto again; 2729 } 2730 2731 len = 3 * NFSX_UNSIGNED; /* paranoia, probably can be 0 */ 2732 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_COOKIEVERF(v3) + siz); 2733 if (v3) { 2734 nfsm_srvpostop_attr(getret, &at); 2735 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2736 txdr_hyper(at.va_filerev, tl); 2737 } 2738 mp = mp2 = mb; 2739 bp = bpos; 2740 be = bp + M_TRAILINGSPACE(mp); 2741 2742 /* Loop through the records and build reply */ 2743 while (cpos < cend && ncookies > 0) { 2744 if (dp->d_fileno != 0 && dp->d_type != DT_WHT) { 2745 nlen = dp->d_namlen; 2746 rem = nfsm_rndup(nlen)-nlen; 2747 len += (4 * NFSX_UNSIGNED + nlen + rem); 2748 if (v3) 2749 len += 2 * NFSX_UNSIGNED; 2750 if (len > cnt) { 2751 eofflag = 0; 2752 break; 2753 } 2754 /* 2755 * Build the directory record xdr from 2756 * the dirent entry. 2757 */ 2758 nfsm_clget; 2759 *tl = nfs_true; 2760 bp += NFSX_UNSIGNED; 2761 if (v3) { 2762 nfsm_clget; 2763 *tl = 0; 2764 bp += NFSX_UNSIGNED; 2765 } 2766 nfsm_clget; 2767 *tl = txdr_unsigned(dp->d_fileno); 2768 bp += NFSX_UNSIGNED; 2769 nfsm_clget; 2770 *tl = txdr_unsigned(nlen); 2771 bp += NFSX_UNSIGNED; 2772 2773 /* And loop around copying the name */ 2774 xfer = nlen; 2775 cp = dp->d_name; 2776 while (xfer > 0) { 2777 nfsm_clget; 2778 if ((bp+xfer) > be) 2779 tsiz = be-bp; 2780 else 2781 tsiz = xfer; 2782 memcpy(bp, cp, tsiz); 2783 bp += tsiz; 2784 xfer -= tsiz; 2785 if (xfer > 0) 2786 cp += tsiz; 2787 } 2788 /* And null pad to an int32_t boundary */ 2789 for (i = 0; i < rem; i++) 2790 *bp++ = '\0'; 2791 nfsm_clget; 2792 2793 /* Finish off the record */ 2794 txdr_hyper(*cookiep, &jar); 2795 if (v3) { 2796 *tl = jar.nfsuquad[0]; 2797 bp += NFSX_UNSIGNED; 2798 nfsm_clget; 2799 } 2800 *tl = jar.nfsuquad[1]; 2801 bp += NFSX_UNSIGNED; 2802 } 2803 cpos += dp->d_reclen; 2804 dp = (struct dirent *)cpos; 2805 cookiep++; 2806 ncookies--; 2807 } 2808 vrele(vp); 2809 nfsm_clget; 2810 *tl = nfs_false; 2811 bp += NFSX_UNSIGNED; 2812 nfsm_clget; 2813 if (eofflag) 2814 *tl = nfs_true; 2815 else 2816 *tl = nfs_false; 2817 bp += NFSX_UNSIGNED; 2818 if (mp != mb) { 2819 if (bp < be) 2820 mp->m_len = bp - mtod(mp, caddr_t); 2821 } else 2822 mp->m_len += bp - bpos; 2823 free((caddr_t)rbuf, M_TEMP); 2824 free((caddr_t)cookies, M_TEMP); 2825 nfsm_srvdone; 2826 } 2827 2828 int 2829 nfsrv_readdirplus(nfsd, slp, procp, mrq) 2830 struct nfsrv_descript *nfsd; 2831 struct nfssvc_sock *slp; 2832 struct proc *procp; 2833 struct mbuf **mrq; 2834 { 2835 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2836 struct mbuf *nam = nfsd->nd_nam; 2837 caddr_t dpos = nfsd->nd_dpos; 2838 struct ucred *cred = &nfsd->nd_cr; 2839 char *bp, *be; 2840 struct mbuf *mp; 2841 struct dirent *dp; 2842 caddr_t cp; 2843 u_int32_t *tl; 2844 int32_t t1; 2845 caddr_t bpos; 2846 struct mbuf *mb, *mreq, *mp2; 2847 char *cpos, *cend, *cp2, *rbuf; 2848 struct vnode *vp, *nvp; 2849 struct flrep fl; 2850 nfsfh_t nfh; 2851 fhandle_t *fhp, *nfhp = (fhandle_t *)fl.fl_nfh; 2852 struct uio io; 2853 struct iovec iv; 2854 struct vattr va, at, *vap = &va; 2855 struct nfs_fattr *fp; 2856 int len, nlen, rem, xfer, tsiz, i, error = 0, getret = 1; 2857 int siz, cnt, fullsiz, eofflag, rdonly, cache, dirlen, ncookies; 2858 u_quad_t frev, off, toff, verf; 2859 off_t *cookies = NULL, *cookiep; 2860 2861 fhp = &nfh.fh_generic; 2862 nfsm_srvmtofh(fhp); 2863 nfsm_dissect(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 2864 toff = fxdr_hyper(tl); 2865 tl += 2; 2866 verf = fxdr_hyper(tl); 2867 tl += 2; 2868 siz = fxdr_unsigned(int, *tl++); 2869 cnt = fxdr_unsigned(int, *tl); 2870 off = toff; 2871 siz = ((siz + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1)); 2872 xfer = NFS_SRVMAXDATA(nfsd); 2873 if (siz > xfer) 2874 siz = xfer; 2875 fullsiz = siz; 2876 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 2877 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2878 if (!error && vp->v_type != VDIR) { 2879 error = ENOTDIR; 2880 vput(vp); 2881 } 2882 if (error) { 2883 nfsm_reply(NFSX_UNSIGNED); 2884 nfsm_srvpostop_attr(getret, &at); 2885 return (0); 2886 } 2887 error = getret = VOP_GETATTR(vp, &at, cred, procp); 2888 #ifdef NFS3_STRICTVERF 2889 /* 2890 * XXX This check is too strict for Solaris 2.5 clients. 2891 */ 2892 if (!error && toff && verf != at.va_filerev) 2893 error = NFSERR_BAD_COOKIE; 2894 #endif 2895 if (!error) { 2896 nqsrv_getl(vp, ND_READ); 2897 error = nfsrv_access(vp, VEXEC, cred, rdonly, procp, 0); 2898 } 2899 if (error) { 2900 vput(vp); 2901 nfsm_reply(NFSX_V3POSTOPATTR); 2902 nfsm_srvpostop_attr(getret, &at); 2903 return (0); 2904 } 2905 VOP_UNLOCK(vp, 0); 2906 2907 rbuf = malloc(siz, M_TEMP, M_WAITOK); 2908 again: 2909 iv.iov_base = rbuf; 2910 iv.iov_len = fullsiz; 2911 io.uio_iov = &iv; 2912 io.uio_iovcnt = 1; 2913 io.uio_offset = (off_t)off; 2914 io.uio_resid = fullsiz; 2915 io.uio_segflg = UIO_SYSSPACE; 2916 io.uio_rw = UIO_READ; 2917 io.uio_procp = (struct proc *)0; 2918 eofflag = 0; 2919 2920 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2921 2922 error = VOP_READDIR(vp, &io, cred, &eofflag, &cookies, &ncookies); 2923 2924 off = (u_quad_t)io.uio_offset; 2925 getret = VOP_GETATTR(vp, &at, cred, procp); 2926 2927 VOP_UNLOCK(vp, 0); 2928 2929 /* 2930 * If the VGET operation doesn't work for this filesystem, 2931 * we can't support readdirplus. Returning NOTSUPP should 2932 * make clients fall back to plain readdir. 2933 * There's no need to check for VPTOFH as well, we wouldn't 2934 * even be here otherwise. 2935 */ 2936 if (!getret) { 2937 if ((getret = VFS_VGET(vp->v_mount, at.va_fileid, &nvp))) 2938 getret = (getret == EOPNOTSUPP) ? 2939 NFSERR_NOTSUPP : NFSERR_IO; 2940 else 2941 vput(nvp); 2942 } 2943 2944 if (!cookies && !error) 2945 error = NFSERR_PERM; 2946 if (!error) 2947 error = getret; 2948 if (error) { 2949 vrele(vp); 2950 if (cookies) 2951 free((caddr_t)cookies, M_TEMP); 2952 free((caddr_t)rbuf, M_TEMP); 2953 nfsm_reply(NFSX_V3POSTOPATTR); 2954 nfsm_srvpostop_attr(getret, &at); 2955 return (0); 2956 } 2957 if (io.uio_resid) { 2958 siz -= io.uio_resid; 2959 2960 /* 2961 * If nothing read, return eof 2962 * rpc reply 2963 */ 2964 if (siz == 0) { 2965 vrele(vp); 2966 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF + 2967 2 * NFSX_UNSIGNED); 2968 nfsm_srvpostop_attr(getret, &at); 2969 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 2970 txdr_hyper(at.va_filerev, tl); 2971 tl += 2; 2972 *tl++ = nfs_false; 2973 *tl = nfs_true; 2974 free((caddr_t)cookies, M_TEMP); 2975 free((caddr_t)rbuf, M_TEMP); 2976 return (0); 2977 } 2978 } 2979 2980 /* 2981 * Check for degenerate cases of nothing useful read. 2982 * If so go try again 2983 */ 2984 cpos = rbuf; 2985 cend = rbuf + siz; 2986 dp = (struct dirent *)cpos; 2987 cookiep = cookies; 2988 2989 while (cpos < cend && ncookies > 0 && 2990 (dp->d_fileno == 0 || dp->d_type == DT_WHT)) { 2991 cpos += dp->d_reclen; 2992 dp = (struct dirent *)cpos; 2993 cookiep++; 2994 ncookies--; 2995 } 2996 if (cpos >= cend || ncookies == 0) { 2997 toff = off; 2998 siz = fullsiz; 2999 goto again; 3000 } 3001 3002 dirlen = len = NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF + 2 * NFSX_UNSIGNED; 3003 nfsm_reply(cnt); 3004 nfsm_srvpostop_attr(getret, &at); 3005 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 3006 txdr_hyper(at.va_filerev, tl); 3007 mp = mp2 = mb; 3008 bp = bpos; 3009 be = bp + M_TRAILINGSPACE(mp); 3010 3011 /* Loop through the records and build reply */ 3012 while (cpos < cend && ncookies > 0) { 3013 if (dp->d_fileno != 0 && dp->d_type != DT_WHT) { 3014 nlen = dp->d_namlen; 3015 rem = nfsm_rndup(nlen)-nlen; 3016 3017 /* 3018 * For readdir_and_lookup get the vnode using 3019 * the file number. 3020 */ 3021 if (VFS_VGET(vp->v_mount, dp->d_fileno, &nvp)) 3022 goto invalid; 3023 memset((caddr_t)nfhp, 0, NFSX_V3FH); 3024 nfhp->fh_fsid = 3025 nvp->v_mount->mnt_stat.f_fsid; 3026 if (VFS_VPTOFH(nvp, &nfhp->fh_fid)) { 3027 vput(nvp); 3028 goto invalid; 3029 } 3030 if (VOP_GETATTR(nvp, vap, cred, procp)) { 3031 vput(nvp); 3032 goto invalid; 3033 } 3034 vput(nvp); 3035 3036 /* 3037 * If either the dircount or maxcount will be 3038 * exceeded, get out now. Both of these lengths 3039 * are calculated conservatively, including all 3040 * XDR overheads. 3041 */ 3042 len += (8 * NFSX_UNSIGNED + nlen + rem + NFSX_V3FH + 3043 NFSX_V3POSTOPATTR); 3044 dirlen += (6 * NFSX_UNSIGNED + nlen + rem); 3045 if (len > cnt || dirlen > fullsiz) { 3046 eofflag = 0; 3047 break; 3048 } 3049 3050 /* 3051 * Build the directory record xdr from 3052 * the dirent entry. 3053 */ 3054 fp = (struct nfs_fattr *)&fl.fl_fattr; 3055 nfsm_srvfillattr(vap, fp); 3056 fl.fl_fhsize = txdr_unsigned(NFSX_V3FH); 3057 fl.fl_fhok = nfs_true; 3058 fl.fl_postopok = nfs_true; 3059 txdr_hyper(*cookiep, fl.fl_off.nfsuquad); 3060 3061 nfsm_clget; 3062 *tl = nfs_true; 3063 bp += NFSX_UNSIGNED; 3064 nfsm_clget; 3065 *tl = 0; 3066 bp += NFSX_UNSIGNED; 3067 nfsm_clget; 3068 *tl = txdr_unsigned(dp->d_fileno); 3069 bp += NFSX_UNSIGNED; 3070 nfsm_clget; 3071 *tl = txdr_unsigned(nlen); 3072 bp += NFSX_UNSIGNED; 3073 3074 /* And loop around copying the name */ 3075 xfer = nlen; 3076 cp = dp->d_name; 3077 while (xfer > 0) { 3078 nfsm_clget; 3079 if ((bp + xfer) > be) 3080 tsiz = be - bp; 3081 else 3082 tsiz = xfer; 3083 memcpy(bp, cp, tsiz); 3084 bp += tsiz; 3085 xfer -= tsiz; 3086 if (xfer > 0) 3087 cp += tsiz; 3088 } 3089 /* And null pad to an int32_t boundary */ 3090 for (i = 0; i < rem; i++) 3091 *bp++ = '\0'; 3092 3093 /* 3094 * Now copy the flrep structure out. 3095 */ 3096 xfer = sizeof (struct flrep); 3097 cp = (caddr_t)&fl; 3098 while (xfer > 0) { 3099 nfsm_clget; 3100 if ((bp + xfer) > be) 3101 tsiz = be - bp; 3102 else 3103 tsiz = xfer; 3104 memcpy(bp, cp, tsiz); 3105 bp += tsiz; 3106 xfer -= tsiz; 3107 if (xfer > 0) 3108 cp += tsiz; 3109 } 3110 } 3111 invalid: 3112 cpos += dp->d_reclen; 3113 dp = (struct dirent *)cpos; 3114 cookiep++; 3115 ncookies--; 3116 } 3117 vrele(vp); 3118 nfsm_clget; 3119 *tl = nfs_false; 3120 bp += NFSX_UNSIGNED; 3121 nfsm_clget; 3122 if (eofflag) 3123 *tl = nfs_true; 3124 else 3125 *tl = nfs_false; 3126 bp += NFSX_UNSIGNED; 3127 if (mp != mb) { 3128 if (bp < be) 3129 mp->m_len = bp - mtod(mp, caddr_t); 3130 } else 3131 mp->m_len += bp - bpos; 3132 free((caddr_t)cookies, M_TEMP); 3133 free((caddr_t)rbuf, M_TEMP); 3134 nfsm_srvdone; 3135 } 3136 3137 /* 3138 * nfs commit service 3139 */ 3140 int 3141 nfsrv_commit(nfsd, slp, procp, mrq) 3142 struct nfsrv_descript *nfsd; 3143 struct nfssvc_sock *slp; 3144 struct proc *procp; 3145 struct mbuf **mrq; 3146 { 3147 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3148 struct mbuf *nam = nfsd->nd_nam; 3149 caddr_t dpos = nfsd->nd_dpos; 3150 struct ucred *cred = &nfsd->nd_cr; 3151 struct vattr bfor, aft; 3152 struct vnode *vp; 3153 nfsfh_t nfh; 3154 fhandle_t *fhp; 3155 u_int32_t *tl; 3156 int32_t t1; 3157 caddr_t bpos; 3158 int error = 0, rdonly, for_ret = 1, aft_ret = 1, cnt, cache; 3159 char *cp2; 3160 struct mbuf *mb, *mreq; 3161 u_quad_t frev, off, end; 3162 struct mount *mp = NULL; 3163 3164 #ifndef nolint 3165 cache = 0; 3166 #endif 3167 fhp = &nfh.fh_generic; 3168 nfsm_srvmtofh(fhp); 3169 if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) 3170 return (ESTALE); 3171 vn_start_write(NULL, &mp, V_WAIT); 3172 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 3173 3174 off = fxdr_hyper(tl); 3175 tl += 2; 3176 cnt = fxdr_unsigned(int, *tl); 3177 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 3178 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 3179 if (error) { 3180 nfsm_reply(2 * NFSX_UNSIGNED); 3181 nfsm_srvwcc_data(for_ret, &bfor, aft_ret, &aft); 3182 vn_finished_write(mp, 0); 3183 return (0); 3184 } 3185 for_ret = VOP_GETATTR(vp, &bfor, cred, procp); 3186 end = (cnt > 0) ? off + cnt : vp->v_size; 3187 if (end < off || end > vp->v_size) 3188 end = vp->v_size; 3189 if (off < vp->v_size) 3190 error = VOP_FSYNC(vp, cred, FSYNC_WAIT, off, end, procp); 3191 /* else error == 0, from nfsrv_fhtovp() */ 3192 aft_ret = VOP_GETATTR(vp, &aft, cred, procp); 3193 vput(vp); 3194 nfsm_reply(NFSX_V3WCCDATA + NFSX_V3WRITEVERF); 3195 nfsm_srvwcc_data(for_ret, &bfor, aft_ret, &aft); 3196 if (!error) { 3197 nfsm_build(tl, u_int32_t *, NFSX_V3WRITEVERF); 3198 *tl++ = txdr_unsigned(boottime.tv_sec); 3199 *tl = txdr_unsigned(boottime.tv_usec); 3200 } else { 3201 vn_finished_write(mp, 0); 3202 return (0); 3203 } 3204 vn_finished_write(mp, 0); 3205 nfsm_srvdone; 3206 } 3207 3208 /* 3209 * nfs statfs service 3210 */ 3211 int 3212 nfsrv_statfs(nfsd, slp, procp, mrq) 3213 struct nfsrv_descript *nfsd; 3214 struct nfssvc_sock *slp; 3215 struct proc *procp; 3216 struct mbuf **mrq; 3217 { 3218 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3219 struct mbuf *nam = nfsd->nd_nam; 3220 caddr_t dpos = nfsd->nd_dpos; 3221 struct ucred *cred = &nfsd->nd_cr; 3222 struct statfs *sf; 3223 struct nfs_statfs *sfp; 3224 u_int32_t *tl; 3225 int32_t t1; 3226 caddr_t bpos; 3227 int error = 0, rdonly, cache, getret = 1; 3228 int v3 = (nfsd->nd_flag & ND_NFSV3); 3229 char *cp2; 3230 struct mbuf *mb, *mreq; 3231 struct vnode *vp; 3232 struct vattr at; 3233 nfsfh_t nfh; 3234 fhandle_t *fhp; 3235 struct statfs statfs; 3236 u_quad_t frev, tval; 3237 3238 #ifndef nolint 3239 cache = 0; 3240 #endif 3241 fhp = &nfh.fh_generic; 3242 nfsm_srvmtofh(fhp); 3243 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 3244 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 3245 if (error) { 3246 nfsm_reply(NFSX_UNSIGNED); 3247 nfsm_srvpostop_attr(getret, &at); 3248 return (0); 3249 } 3250 sf = &statfs; 3251 error = VFS_STATFS(vp->v_mount, sf, procp); 3252 getret = VOP_GETATTR(vp, &at, cred, procp); 3253 vput(vp); 3254 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_STATFS(v3)); 3255 if (v3) 3256 nfsm_srvpostop_attr(getret, &at); 3257 if (error) 3258 return (0); 3259 nfsm_build(sfp, struct nfs_statfs *, NFSX_STATFS(v3)); 3260 if (v3) { 3261 tval = (u_quad_t)((quad_t)sf->f_blocks * (quad_t)sf->f_bsize); 3262 txdr_hyper(tval, &sfp->sf_tbytes); 3263 tval = (u_quad_t)((quad_t)sf->f_bfree * (quad_t)sf->f_bsize); 3264 txdr_hyper(tval, &sfp->sf_fbytes); 3265 tval = (u_quad_t)((quad_t)sf->f_bavail * (quad_t)sf->f_bsize); 3266 txdr_hyper(tval, &sfp->sf_abytes); 3267 tval = (u_quad_t)sf->f_files; 3268 txdr_hyper(tval, &sfp->sf_tfiles); 3269 tval = (u_quad_t)sf->f_ffree; 3270 txdr_hyper(tval, &sfp->sf_ffiles); 3271 txdr_hyper(tval, &sfp->sf_afiles); 3272 sfp->sf_invarsec = 0; 3273 } else { 3274 sfp->sf_tsize = txdr_unsigned(NFS_MAXDGRAMDATA); 3275 sfp->sf_bsize = txdr_unsigned(sf->f_bsize); 3276 sfp->sf_blocks = txdr_unsigned(sf->f_blocks); 3277 sfp->sf_bfree = txdr_unsigned(sf->f_bfree); 3278 sfp->sf_bavail = txdr_unsigned(sf->f_bavail); 3279 } 3280 nfsm_srvdone; 3281 } 3282 3283 /* 3284 * nfs fsinfo service 3285 */ 3286 int 3287 nfsrv_fsinfo(nfsd, slp, procp, mrq) 3288 struct nfsrv_descript *nfsd; 3289 struct nfssvc_sock *slp; 3290 struct proc *procp; 3291 struct mbuf **mrq; 3292 { 3293 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3294 struct mbuf *nam = nfsd->nd_nam; 3295 caddr_t dpos = nfsd->nd_dpos; 3296 struct ucred *cred = &nfsd->nd_cr; 3297 u_int32_t *tl; 3298 struct nfsv3_fsinfo *sip; 3299 int32_t t1; 3300 caddr_t bpos; 3301 int error = 0, rdonly, cache, getret = 1; 3302 uint32_t maxdata; 3303 char *cp2; 3304 struct mbuf *mb, *mreq; 3305 struct vnode *vp; 3306 struct vattr at; 3307 nfsfh_t nfh; 3308 fhandle_t *fhp; 3309 u_quad_t frev, maxfsize; 3310 struct statfs sb; 3311 3312 #ifndef nolint 3313 cache = 0; 3314 #endif 3315 fhp = &nfh.fh_generic; 3316 nfsm_srvmtofh(fhp); 3317 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 3318 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 3319 if (error) { 3320 nfsm_reply(NFSX_UNSIGNED); 3321 nfsm_srvpostop_attr(getret, &at); 3322 return (0); 3323 } 3324 3325 /* XXX Try to make a guess on the max file size. */ 3326 VFS_STATFS(vp->v_mount, &sb, (struct proc *)0); 3327 maxfsize = (u_quad_t)0x80000000 * sb.f_bsize - 1; 3328 3329 getret = VOP_GETATTR(vp, &at, cred, procp); 3330 vput(vp); 3331 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3FSINFO); 3332 nfsm_srvpostop_attr(getret, &at); 3333 nfsm_build(sip, struct nfsv3_fsinfo *, NFSX_V3FSINFO); 3334 3335 /* 3336 * XXX 3337 * There should be file system VFS OP(s) to get this information. 3338 * For now, assume ufs. 3339 */ 3340 if (slp->ns_so->so_type == SOCK_DGRAM) 3341 maxdata = NFS_MAXDGRAMDATA; 3342 else 3343 maxdata = NFS_MAXDATA; 3344 sip->fs_rtmax = txdr_unsigned(maxdata); 3345 sip->fs_rtpref = txdr_unsigned(maxdata); 3346 sip->fs_rtmult = txdr_unsigned(NFS_FABLKSIZE); 3347 sip->fs_wtmax = txdr_unsigned(maxdata); 3348 sip->fs_wtpref = txdr_unsigned(maxdata); 3349 sip->fs_wtmult = txdr_unsigned(NFS_FABLKSIZE); 3350 sip->fs_dtpref = txdr_unsigned(maxdata); 3351 txdr_hyper(maxfsize, &sip->fs_maxfilesize); 3352 sip->fs_timedelta.nfsv3_sec = 0; 3353 sip->fs_timedelta.nfsv3_nsec = txdr_unsigned(1); 3354 sip->fs_properties = txdr_unsigned(NFSV3FSINFO_LINK | 3355 NFSV3FSINFO_SYMLINK | NFSV3FSINFO_HOMOGENEOUS | 3356 NFSV3FSINFO_CANSETTIME); 3357 nfsm_srvdone; 3358 } 3359 3360 /* 3361 * nfs pathconf service 3362 */ 3363 int 3364 nfsrv_pathconf(nfsd, slp, procp, mrq) 3365 struct nfsrv_descript *nfsd; 3366 struct nfssvc_sock *slp; 3367 struct proc *procp; 3368 struct mbuf **mrq; 3369 { 3370 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3371 struct mbuf *nam = nfsd->nd_nam; 3372 caddr_t dpos = nfsd->nd_dpos; 3373 struct ucred *cred = &nfsd->nd_cr; 3374 u_int32_t *tl; 3375 struct nfsv3_pathconf *pc; 3376 int32_t t1; 3377 caddr_t bpos; 3378 int error = 0, rdonly, cache, getret = 1; 3379 register_t linkmax, namemax, chownres, notrunc; 3380 char *cp2; 3381 struct mbuf *mb, *mreq; 3382 struct vnode *vp; 3383 struct vattr at; 3384 nfsfh_t nfh; 3385 fhandle_t *fhp; 3386 u_quad_t frev; 3387 3388 #ifndef nolint 3389 cache = 0; 3390 #endif 3391 fhp = &nfh.fh_generic; 3392 nfsm_srvmtofh(fhp); 3393 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 3394 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 3395 if (error) { 3396 nfsm_reply(NFSX_UNSIGNED); 3397 nfsm_srvpostop_attr(getret, &at); 3398 return (0); 3399 } 3400 error = VOP_PATHCONF(vp, _PC_LINK_MAX, &linkmax); 3401 if (!error) 3402 error = VOP_PATHCONF(vp, _PC_NAME_MAX, &namemax); 3403 if (!error) 3404 error = VOP_PATHCONF(vp, _PC_CHOWN_RESTRICTED, &chownres); 3405 if (!error) 3406 error = VOP_PATHCONF(vp, _PC_NO_TRUNC, ¬runc); 3407 getret = VOP_GETATTR(vp, &at, cred, procp); 3408 vput(vp); 3409 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3PATHCONF); 3410 nfsm_srvpostop_attr(getret, &at); 3411 if (error) 3412 return (0); 3413 nfsm_build(pc, struct nfsv3_pathconf *, NFSX_V3PATHCONF); 3414 3415 pc->pc_linkmax = txdr_unsigned(linkmax); 3416 pc->pc_namemax = txdr_unsigned(namemax); 3417 pc->pc_notrunc = txdr_unsigned(notrunc); 3418 pc->pc_chownrestricted = txdr_unsigned(chownres); 3419 3420 /* 3421 * These should probably be supported by VOP_PATHCONF(), but 3422 * until msdosfs is exportable (why would you want to?), the 3423 * Unix defaults should be ok. 3424 */ 3425 pc->pc_caseinsensitive = nfs_false; 3426 pc->pc_casepreserving = nfs_true; 3427 nfsm_srvdone; 3428 } 3429 3430 /* 3431 * Null operation, used by clients to ping server 3432 */ 3433 /* ARGSUSED */ 3434 int 3435 nfsrv_null(nfsd, slp, procp, mrq) 3436 struct nfsrv_descript *nfsd; 3437 struct nfssvc_sock *slp; 3438 struct proc *procp; 3439 struct mbuf **mrq; 3440 { 3441 struct mbuf *mrep = nfsd->nd_mrep; 3442 caddr_t bpos; 3443 int error = NFSERR_RETVOID, cache = 0; 3444 struct mbuf *mb, *mreq; 3445 u_quad_t frev; 3446 3447 nfsm_reply(0); 3448 return (0); 3449 } 3450 3451 /* 3452 * No operation, used for obsolete procedures 3453 */ 3454 /* ARGSUSED */ 3455 int 3456 nfsrv_noop(nfsd, slp, procp, mrq) 3457 struct nfsrv_descript *nfsd; 3458 struct nfssvc_sock *slp; 3459 struct proc *procp; 3460 struct mbuf **mrq; 3461 { 3462 struct mbuf *mrep = nfsd->nd_mrep; 3463 caddr_t bpos; 3464 int error, cache = 0; 3465 struct mbuf *mb, *mreq; 3466 u_quad_t frev; 3467 3468 if (nfsd->nd_repstat) 3469 error = nfsd->nd_repstat; 3470 else 3471 error = EPROCUNAVAIL; 3472 nfsm_reply(0); 3473 return (0); 3474 } 3475 3476 /* 3477 * Perform access checking for vnodes obtained from file handles that would 3478 * refer to files already opened by a Unix client. You cannot just use 3479 * vn_writechk() and VOP_ACCESS() for two reasons. 3480 * 1 - You must check for exported rdonly as well as MNT_RDONLY for the write case 3481 * 2 - The owner is to be given access irrespective of mode bits for some 3482 * operations, so that processes that chmod after opening a file don't 3483 * break. I don't like this because it opens a security hole, but since 3484 * the nfs server opens a security hole the size of a barn door anyhow, 3485 * what the heck. 3486 * 3487 * The exception to rule 2 is EPERM. If a file is IMMUTABLE, VOP_ACCESS() 3488 * will return EPERM instead of EACCESS. EPERM is always an error. 3489 */ 3490 int 3491 nfsrv_access(vp, flags, cred, rdonly, p, override) 3492 struct vnode *vp; 3493 int flags; 3494 struct ucred *cred; 3495 int rdonly; 3496 struct proc *p; 3497 { 3498 struct vattr vattr; 3499 int error; 3500 if (flags & VWRITE) { 3501 /* Just vn_writechk() changed to check rdonly */ 3502 /* 3503 * Disallow write attempts on read-only file systems; 3504 * unless the file is a socket or a block or character 3505 * device resident on the file system. 3506 */ 3507 if (rdonly || (vp->v_mount->mnt_flag & MNT_RDONLY)) { 3508 switch (vp->v_type) { 3509 case VREG: 3510 case VDIR: 3511 case VLNK: 3512 return (EROFS); 3513 default: 3514 break; 3515 } 3516 } 3517 3518 /* 3519 * If the vnode is in use as a process's text, 3520 * we can't allow writing. 3521 */ 3522 if (vp->v_flag & VTEXT) 3523 return (ETXTBSY); 3524 } 3525 error = VOP_GETATTR(vp, &vattr, cred, p); 3526 if (error) 3527 return (error); 3528 error = VOP_ACCESS(vp, flags, cred, p); 3529 /* 3530 * Allow certain operations for the owner (reads and writes 3531 * on files that are already open). 3532 */ 3533 if (override && error == EACCES && cred->cr_uid == vattr.va_uid) 3534 error = 0; 3535 return error; 3536 }
Cache object: fd749b4a10797491cd856f78e65124b6
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