nfs_serv.c revision 1.101.4.4
1 /* $NetBSD: nfs_serv.c,v 1.101.4.4 2006/04/19 05:06:37 elad 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 1.101.4.4 2006/04/19 05:06:37 elad 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 74 #include <uvm/uvm.h> 75 76 #include <nfs/nfsproto.h> 77 #include <nfs/rpcv2.h> 78 #include <nfs/nfs.h> 79 #include <nfs/xdr_subs.h> 80 #include <nfs/nfsm_subs.h> 81 #include <nfs/nqnfs.h> 82 #include <nfs/nfs_var.h> 83 84 /* Global vars */ 85 extern u_int32_t nfs_xdrneg1; 86 extern u_int32_t nfs_false, nfs_true; 87 extern enum vtype nv3tov_type[8]; 88 extern struct nfsstats nfsstats; 89 extern const nfstype nfsv2_type[9]; 90 extern const nfstype nfsv3_type[9]; 91 int nfsrvw_procrastinate = NFS_GATHERDELAY * 1000; 92 int nfsd_use_loan = 1; /* use page-loan for READ OP */ 93 94 /* 95 * nfs v3 access service 96 */ 97 int 98 nfsrv3_access(nfsd, slp, lwp, mrq) 99 struct nfsrv_descript *nfsd; 100 struct nfssvc_sock *slp; 101 struct lwp *lwp; 102 struct mbuf **mrq; 103 { 104 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 105 struct mbuf *nam = nfsd->nd_nam; 106 caddr_t dpos = nfsd->nd_dpos; 107 kauth_cred_t cred = nfsd->nd_cr; 108 struct vnode *vp; 109 nfsfh_t nfh; 110 fhandle_t *fhp; 111 u_int32_t *tl; 112 int32_t t1; 113 caddr_t bpos; 114 int error = 0, rdonly, cache = 0, getret; 115 char *cp2; 116 struct mbuf *mb, *mreq; 117 struct vattr va; 118 u_long inmode, testmode, outmode; 119 u_quad_t frev; 120 121 fhp = &nfh.fh_generic; 122 nfsm_srvmtofh(fhp); 123 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 124 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, &rdonly, 125 (nfsd->nd_flag & ND_KERBAUTH), FALSE); 126 if (error) { 127 nfsm_reply(NFSX_UNSIGNED); 128 nfsm_srvpostop_attr(1, (struct vattr *)0); 129 return (0); 130 } 131 inmode = fxdr_unsigned(u_int32_t, *tl); 132 outmode = 0; 133 if ((inmode & NFSV3ACCESS_READ) && 134 nfsrv_access(vp, VREAD, cred, rdonly, lwp, 0) == 0) 135 outmode |= NFSV3ACCESS_READ; 136 if (vp->v_type != VDIR) { 137 testmode = inmode & (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND); 138 if (testmode && 139 nfsrv_access(vp, VWRITE, cred, rdonly, lwp, 0) == 0) 140 outmode |= testmode; 141 if ((inmode & NFSV3ACCESS_EXECUTE) && 142 nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 0) == 0) 143 outmode |= NFSV3ACCESS_EXECUTE; 144 } else { 145 testmode = inmode & (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | 146 NFSV3ACCESS_DELETE); 147 if (testmode && 148 nfsrv_access(vp, VWRITE, cred, rdonly, lwp, 0) == 0) 149 outmode |= testmode; 150 if ((inmode & NFSV3ACCESS_LOOKUP) && 151 nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 0) == 0) 152 outmode |= NFSV3ACCESS_LOOKUP; 153 } 154 getret = VOP_GETATTR(vp, &va, cred, lwp); 155 vput(vp); 156 nfsm_reply(NFSX_POSTOPATTR(1) + NFSX_UNSIGNED); 157 nfsm_srvpostop_attr(getret, &va); 158 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 159 *tl = txdr_unsigned(outmode); 160 nfsm_srvdone; 161 } 162 163 /* 164 * nfs getattr service 165 */ 166 int 167 nfsrv_getattr(nfsd, slp, lwp, mrq) 168 struct nfsrv_descript *nfsd; 169 struct nfssvc_sock *slp; 170 struct lwp *lwp; 171 struct mbuf **mrq; 172 { 173 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 174 struct mbuf *nam = nfsd->nd_nam; 175 caddr_t dpos = nfsd->nd_dpos; 176 kauth_cred_t cred = nfsd->nd_cr; 177 struct nfs_fattr *fp; 178 struct vattr va; 179 struct vnode *vp; 180 nfsfh_t nfh; 181 fhandle_t *fhp; 182 u_int32_t *tl; 183 int32_t t1; 184 caddr_t bpos; 185 int error = 0, rdonly, cache = 0; 186 char *cp2; 187 struct mbuf *mb, *mreq; 188 u_quad_t frev; 189 190 fhp = &nfh.fh_generic; 191 nfsm_srvmtofh(fhp); 192 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, &rdonly, 193 (nfsd->nd_flag & ND_KERBAUTH), FALSE); 194 if (error) { 195 nfsm_reply(0); 196 return (0); 197 } 198 nqsrv_getl(vp, ND_READ); 199 error = VOP_GETATTR(vp, &va, cred, lwp); 200 vput(vp); 201 nfsm_reply(NFSX_FATTR(nfsd->nd_flag & ND_NFSV3)); 202 if (error) 203 return (0); 204 nfsm_build(fp, struct nfs_fattr *, NFSX_FATTR(nfsd->nd_flag & ND_NFSV3)); 205 nfsm_srvfillattr(&va, fp); 206 nfsm_srvdone; 207 } 208 209 /* 210 * nfs setattr service 211 */ 212 int 213 nfsrv_setattr(nfsd, slp, lwp, mrq) 214 struct nfsrv_descript *nfsd; 215 struct nfssvc_sock *slp; 216 struct lwp *lwp; 217 struct mbuf **mrq; 218 { 219 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 220 struct mbuf *nam = nfsd->nd_nam; 221 caddr_t dpos = nfsd->nd_dpos; 222 kauth_cred_t cred = nfsd->nd_cr; 223 struct vattr va, preat; 224 struct nfsv2_sattr *sp; 225 struct nfs_fattr *fp; 226 struct vnode *vp; 227 nfsfh_t nfh; 228 fhandle_t *fhp; 229 u_int32_t *tl; 230 int32_t t1; 231 caddr_t bpos; 232 int error = 0, rdonly, cache = 0, preat_ret = 1, postat_ret = 1; 233 int v3 = (nfsd->nd_flag & ND_NFSV3), gcheck = 0; 234 char *cp2; 235 struct mbuf *mb, *mreq; 236 u_quad_t frev; 237 struct timespec guard; 238 struct mount *mp = NULL; 239 240 fhp = &nfh.fh_generic; 241 nfsm_srvmtofh(fhp); 242 if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) 243 return (ESTALE); 244 vn_start_write(NULL, &mp, V_WAIT); 245 VATTR_NULL(&va); 246 if (v3) { 247 nfsm_srvsattr(&va); 248 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 249 gcheck = fxdr_unsigned(int, *tl); 250 if (gcheck) { 251 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 252 fxdr_nfsv3time(tl, &guard); 253 } 254 } else { 255 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 256 /* 257 * Nah nah nah nah na nah 258 * There is a bug in the Sun client that puts 0xffff in the mode 259 * field of sattr when it should put in 0xffffffff. The u_short 260 * doesn't sign extend. 261 * --> check the low order 2 bytes for 0xffff 262 */ 263 if ((fxdr_unsigned(int, sp->sa_mode) & 0xffff) != 0xffff) 264 va.va_mode = nfstov_mode(sp->sa_mode); 265 if (sp->sa_uid != nfs_xdrneg1) 266 va.va_uid = fxdr_unsigned(uid_t, sp->sa_uid); 267 if (sp->sa_gid != nfs_xdrneg1) 268 va.va_gid = fxdr_unsigned(gid_t, sp->sa_gid); 269 if (sp->sa_size != nfs_xdrneg1) 270 va.va_size = fxdr_unsigned(u_quad_t, sp->sa_size); 271 if (sp->sa_atime.nfsv2_sec != nfs_xdrneg1) { 272 #ifdef notyet 273 fxdr_nfsv2time(&sp->sa_atime, &va.va_atime); 274 #else 275 va.va_atime.tv_sec = 276 fxdr_unsigned(u_int32_t,sp->sa_atime.nfsv2_sec); 277 va.va_atime.tv_nsec = 0; 278 #endif 279 } 280 if (sp->sa_mtime.nfsv2_sec != nfs_xdrneg1) 281 fxdr_nfsv2time(&sp->sa_mtime, &va.va_mtime); 282 283 } 284 285 /* 286 * Now that we have all the fields, lets do it. 287 */ 288 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, &rdonly, 289 (nfsd->nd_flag & ND_KERBAUTH), FALSE); 290 if (error) { 291 nfsm_reply(2 * NFSX_UNSIGNED); 292 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 293 vn_finished_write(mp, 0); 294 return (0); 295 } 296 nqsrv_getl(vp, ND_WRITE); 297 if (v3) { 298 error = preat_ret = VOP_GETATTR(vp, &preat, cred, lwp); 299 if (!error && gcheck && 300 (preat.va_ctime.tv_sec != guard.tv_sec || 301 preat.va_ctime.tv_nsec != guard.tv_nsec)) 302 error = NFSERR_NOT_SYNC; 303 if (error) { 304 vput(vp); 305 nfsm_reply(NFSX_WCCDATA(v3)); 306 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 307 vn_finished_write(mp, 0); 308 return (0); 309 } 310 } 311 312 /* 313 * If the size is being changed write acces is required, otherwise 314 * just check for a read only file system. 315 */ 316 if (va.va_size == ((u_quad_t)((quad_t) -1))) { 317 if (rdonly || (vp->v_mount->mnt_flag & MNT_RDONLY)) { 318 error = EROFS; 319 goto out; 320 } 321 } else { 322 if (vp->v_type == VDIR) { 323 error = EISDIR; 324 goto out; 325 } else if ((error = nfsrv_access(vp, VWRITE, cred, rdonly, 326 lwp, 0)) != 0) 327 goto out; 328 } 329 error = VOP_SETATTR(vp, &va, cred, lwp); 330 postat_ret = VOP_GETATTR(vp, &va, cred, lwp); 331 if (!error) 332 error = postat_ret; 333 out: 334 vput(vp); 335 vn_finished_write(mp, 0); 336 nfsm_reply(NFSX_WCCORFATTR(v3)); 337 if (v3) { 338 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 339 return (0); 340 } else { 341 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 342 nfsm_srvfillattr(&va, fp); 343 } 344 nfsm_srvdone; 345 } 346 347 /* 348 * nfs lookup rpc 349 */ 350 int 351 nfsrv_lookup(nfsd, slp, lwp, mrq) 352 struct nfsrv_descript *nfsd; 353 struct nfssvc_sock *slp; 354 struct lwp *lwp; 355 struct mbuf **mrq; 356 { 357 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 358 struct mbuf *nam = nfsd->nd_nam; 359 caddr_t dpos = nfsd->nd_dpos; 360 kauth_cred_t cred = nfsd->nd_cr; 361 struct nfs_fattr *fp; 362 struct nameidata nd, ind, *ndp = &nd; 363 struct vnode *vp, *dirp; 364 nfsfh_t nfh; 365 fhandle_t *fhp; 366 caddr_t cp; 367 u_int32_t *tl; 368 int32_t t1; 369 caddr_t bpos; 370 int error = 0, cache = 0, dirattr_ret = 1; 371 uint32_t len; 372 int v3 = (nfsd->nd_flag & ND_NFSV3), pubflag; 373 char *cp2; 374 struct mbuf *mb, *mreq; 375 struct vattr va, dirattr; 376 u_quad_t frev; 377 378 fhp = &nfh.fh_generic; 379 nfsm_srvmtofh(fhp); 380 nfsm_srvnamesiz(len); 381 382 pubflag = nfs_ispublicfh(fhp); 383 384 nd.ni_cnd.cn_cred = cred; 385 nd.ni_cnd.cn_nameiop = LOOKUP; 386 nd.ni_cnd.cn_flags = LOCKLEAF | SAVESTART; 387 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 388 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), pubflag); 389 390 if (!error && pubflag) { 391 if (nd.ni_vp->v_type == VDIR && nfs_pub.np_index != NULL) { 392 /* 393 * Setup call to lookup() to see if we can find 394 * the index file. Arguably, this doesn't belong 395 * in a kernel.. Ugh. 396 */ 397 ind = nd; 398 VOP_UNLOCK(nd.ni_vp, 0); 399 ind.ni_pathlen = strlen(nfs_pub.np_index); 400 ind.ni_cnd.cn_nameptr = ind.ni_cnd.cn_pnbuf = 401 nfs_pub.np_index; 402 ind.ni_startdir = nd.ni_vp; 403 VREF(ind.ni_startdir); 404 error = lookup(&ind); 405 if (!error) { 406 /* 407 * Found an index file. Get rid of 408 * the old references. 409 */ 410 if (dirp) 411 vrele(dirp); 412 dirp = nd.ni_vp; 413 vrele(nd.ni_startdir); 414 ndp = &ind; 415 } else 416 error = 0; 417 } 418 /* 419 * If the public filehandle was used, check that this lookup 420 * didn't result in a filehandle outside the publicly exported 421 * filesystem. 422 */ 423 424 if (!error && ndp->ni_vp->v_mount != nfs_pub.np_mount) { 425 vput(nd.ni_vp); 426 error = EPERM; 427 } 428 } 429 430 if (dirp) { 431 if (v3) 432 dirattr_ret = VOP_GETATTR(dirp, &dirattr, cred, lwp); 433 vrele(dirp); 434 } 435 436 if (error) { 437 nfsm_reply(NFSX_POSTOPATTR(v3)); 438 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 439 return (0); 440 } 441 442 nqsrv_getl(ndp->ni_startdir, ND_READ); 443 vrele(ndp->ni_startdir); 444 PNBUF_PUT(nd.ni_cnd.cn_pnbuf); 445 vp = ndp->ni_vp; 446 memset((caddr_t)fhp, 0, sizeof(nfh)); 447 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsidx; 448 error = VFS_VPTOFH(vp, &fhp->fh_fid); 449 if (!error) 450 error = VOP_GETATTR(vp, &va, cred, lwp); 451 vput(vp); 452 KASSERT(fhp->fh_fid.fid_len <= _VFS_MAXFIDSZ); 453 nfsm_reply(NFSX_SRVFH(v3) + NFSX_POSTOPORFATTR(v3) + NFSX_POSTOPATTR(v3)); 454 if (error) { 455 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 456 return (0); 457 } 458 nfsm_srvfhtom(fhp, v3); 459 if (v3) { 460 nfsm_srvpostop_attr(0, &va); 461 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 462 } else { 463 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 464 nfsm_srvfillattr(&va, fp); 465 } 466 nfsm_srvdone; 467 } 468 469 /* 470 * nfs readlink service 471 */ 472 int 473 nfsrv_readlink(nfsd, slp, lwp, mrq) 474 struct nfsrv_descript *nfsd; 475 struct nfssvc_sock *slp; 476 struct lwp *lwp; 477 struct mbuf **mrq; 478 { 479 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 480 struct mbuf *nam = nfsd->nd_nam; 481 caddr_t dpos = nfsd->nd_dpos; 482 kauth_cred_t cred = nfsd->nd_cr; 483 struct iovec iv[(NFS_MAXPATHLEN+MLEN-1)/MLEN]; 484 struct iovec *ivp = iv; 485 struct mbuf *mp; 486 u_int32_t *tl; 487 int32_t t1; 488 caddr_t bpos; 489 int error = 0, rdonly, cache = 0, i, padlen, getret; 490 uint32_t len; 491 int v3 = (nfsd->nd_flag & ND_NFSV3); 492 char *cp2; 493 struct mbuf *mb, *mp2 = NULL, *mp3 = NULL, *mreq; 494 struct vnode *vp; 495 struct vattr attr; 496 nfsfh_t nfh; 497 fhandle_t *fhp; 498 struct uio io, *uiop = &io; 499 u_quad_t frev; 500 501 fhp = &nfh.fh_generic; 502 nfsm_srvmtofh(fhp); 503 len = 0; 504 i = 0; 505 while (len < NFS_MAXPATHLEN) { 506 mp = m_get(M_WAIT, MT_DATA); 507 MCLAIM(mp, &nfs_mowner); 508 m_clget(mp, M_WAIT); 509 mp->m_len = NFSMSIZ(mp); 510 if (len == 0) 511 mp3 = mp2 = mp; 512 else { 513 mp2->m_next = mp; 514 mp2 = mp; 515 } 516 if ((len+mp->m_len) > NFS_MAXPATHLEN) { 517 mp->m_len = NFS_MAXPATHLEN-len; 518 len = NFS_MAXPATHLEN; 519 } else 520 len += mp->m_len; 521 ivp->iov_base = mtod(mp, caddr_t); 522 ivp->iov_len = mp->m_len; 523 i++; 524 ivp++; 525 } 526 uiop->uio_iov = iv; 527 uiop->uio_iovcnt = i; 528 uiop->uio_offset = 0; 529 uiop->uio_resid = len; 530 uiop->uio_rw = UIO_READ; 531 UIO_SETUP_SYSSPACE(uiop); 532 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 533 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 534 if (error) { 535 m_freem(mp3); 536 nfsm_reply(2 * NFSX_UNSIGNED); 537 nfsm_srvpostop_attr(1, (struct vattr *)0); 538 return (0); 539 } 540 if (vp->v_type != VLNK) { 541 if (v3) 542 error = EINVAL; 543 else 544 error = ENXIO; 545 goto out; 546 } 547 nqsrv_getl(vp, ND_READ); 548 error = VOP_READLINK(vp, uiop, cred); 549 out: 550 getret = VOP_GETATTR(vp, &attr, cred, lwp); 551 vput(vp); 552 if (error) 553 m_freem(mp3); 554 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_UNSIGNED); 555 if (v3) { 556 nfsm_srvpostop_attr(getret, &attr); 557 if (error) 558 return (0); 559 } 560 len -= uiop->uio_resid; 561 padlen = nfsm_padlen(len); 562 if (uiop->uio_resid || padlen) 563 nfs_zeropad(mp3, uiop->uio_resid, padlen); 564 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 565 *tl = txdr_unsigned(len); 566 mb->m_next = mp3; 567 nfsm_srvdone; 568 } 569 570 /* 571 * nfs read service 572 */ 573 int 574 nfsrv_read(nfsd, slp, lwp, mrq) 575 struct nfsrv_descript *nfsd; 576 struct nfssvc_sock *slp; 577 struct lwp *lwp; 578 struct mbuf **mrq; 579 { 580 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 581 struct mbuf *nam = nfsd->nd_nam; 582 caddr_t dpos = nfsd->nd_dpos; 583 kauth_cred_t cred = nfsd->nd_cr; 584 struct mbuf *m; 585 struct nfs_fattr *fp; 586 u_int32_t *tl; 587 int32_t t1; 588 int i; 589 caddr_t bpos; 590 int error = 0, rdonly, cache = 0, getret; 591 int v3 = (nfsd->nd_flag & ND_NFSV3); 592 uint32_t reqlen, len, cnt, left; 593 int padlen; 594 char *cp2; 595 struct mbuf *mb, *mreq; 596 struct vnode *vp; 597 nfsfh_t nfh; 598 fhandle_t *fhp; 599 struct uio io, *uiop = &io; 600 struct vattr va; 601 off_t off; 602 u_quad_t frev; 603 604 fhp = &nfh.fh_generic; 605 nfsm_srvmtofh(fhp); 606 if (v3) { 607 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 608 off = fxdr_hyper(tl); 609 } else { 610 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 611 off = (off_t)fxdr_unsigned(u_int32_t, *tl); 612 } 613 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 614 reqlen = fxdr_unsigned(uint32_t, *tl); 615 reqlen = MIN(reqlen, NFS_SRVMAXDATA(nfsd)); 616 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 617 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 618 if (error) { 619 nfsm_reply(2 * NFSX_UNSIGNED); 620 nfsm_srvpostop_attr(1, (struct vattr *)0); 621 return (0); 622 } 623 if (vp->v_type != VREG) { 624 if (v3) 625 error = EINVAL; 626 else 627 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 628 } 629 if (!error) { 630 nqsrv_getl(vp, ND_READ); 631 if ((error = nfsrv_access(vp, VREAD, cred, rdonly, lwp, 1)) != 0) 632 error = nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 1); 633 } 634 getret = VOP_GETATTR(vp, &va, cred, lwp); 635 if (!error) 636 error = getret; 637 if (error) { 638 vput(vp); 639 nfsm_reply(NFSX_POSTOPATTR(v3)); 640 nfsm_srvpostop_attr(getret, &va); 641 return (0); 642 } 643 if (off >= va.va_size) 644 cnt = 0; 645 else if ((off + reqlen) > va.va_size) 646 cnt = va.va_size - off; 647 else 648 cnt = reqlen; 649 nfsm_reply(NFSX_POSTOPORFATTR(v3) + 3 * NFSX_UNSIGNED+nfsm_rndup(cnt)); 650 if (v3) { 651 nfsm_build(tl, u_int32_t *, NFSX_V3FATTR + 4 * NFSX_UNSIGNED); 652 *tl++ = nfs_true; 653 fp = (struct nfs_fattr *)tl; 654 tl += (NFSX_V3FATTR / sizeof (u_int32_t)); 655 } else { 656 nfsm_build(tl, u_int32_t *, NFSX_V2FATTR + NFSX_UNSIGNED); 657 fp = (struct nfs_fattr *)tl; 658 tl += (NFSX_V2FATTR / sizeof (u_int32_t)); 659 } 660 len = left = cnt; 661 if (cnt > 0) { 662 if (nfsd_use_loan) { 663 struct vm_page **pgpp; 664 voff_t pgoff = trunc_page(off); 665 int npages; 666 vaddr_t lva; 667 668 npages = (round_page(off + cnt) - pgoff) >> PAGE_SHIFT; 669 KASSERT(npages <= M_EXT_MAXPAGES); /* XXX */ 670 671 /* allocate kva for mbuf data */ 672 lva = sokvaalloc(npages << PAGE_SHIFT, slp->ns_so); 673 if (lva == 0) { 674 /* fall back to VOP_READ */ 675 goto loan_fail; 676 } 677 678 /* allocate mbuf */ 679 m = m_get(M_WAIT, MT_DATA); 680 MCLAIM(m, &nfs_mowner); 681 pgpp = m->m_ext.ext_pgs; 682 683 /* loan pages */ 684 error = uvm_loanuobjpages(&vp->v_uobj, pgoff, npages, 685 pgpp); 686 if (error) { 687 sokvafree(lva, npages << PAGE_SHIFT); 688 m_free(m); 689 if (error == EBUSY) 690 goto loan_fail; 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 UIO_SETUP_SYSSPACE(uiop); 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, lwp)) != 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, lwp, mrq) 804 struct nfsrv_descript *nfsd; 805 struct nfssvc_sock *slp; 806 struct lwp *lwp; 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 kauth_cred_t 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 = 0, 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, lwp); 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, lwp, 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_offset = off; 953 UIO_SETUP_SYSSPACE(uiop); 954 error = VOP_WRITE(vp, uiop, ioflags, cred); 955 nfsstats.srvvop_writes++; 956 free(iv, M_TEMP); 957 } 958 aftat_ret = VOP_GETATTR(vp, &va, cred, lwp); 959 vput(vp); 960 vn_finished_write(mntp, 0); 961 if (!error) 962 error = aftat_ret; 963 nfsm_reply(NFSX_PREOPATTR(v3) + NFSX_POSTOPORFATTR(v3) + 964 2 * NFSX_UNSIGNED + NFSX_WRITEVERF(v3)); 965 if (v3) { 966 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 967 if (error) 968 return (0); 969 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 970 *tl++ = txdr_unsigned(retlen); 971 if (stable == NFSV3WRITE_UNSTABLE) 972 *tl++ = txdr_unsigned(stable); 973 else 974 *tl++ = txdr_unsigned(NFSV3WRITE_FILESYNC); 975 /* 976 * Actually, there is no need to txdr these fields, 977 * but it may make the values more human readable, 978 * for debugging purposes. 979 */ 980 *tl++ = txdr_unsigned(boottime.tv_sec); 981 *tl = txdr_unsigned(boottime.tv_usec); 982 } else { 983 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 984 nfsm_srvfillattr(&va, fp); 985 } 986 nfsm_srvdone; 987 } 988 989 /* 990 * XXX elad: the original NFSW_SAMECRED() macro also made sure the 991 * two nd_flag fields of the descriptors contained 992 * ND_KERBAUTH. 993 */ 994 static int 995 nfsrv_samecred(kauth_cred_t cred1, kauth_cred_t cred2) 996 { 997 int i, do_ngroups; 998 999 if (kauth_cred_geteuid(cred1) != kauth_cred_geteuid(cred2)) 1000 return (0); 1001 if (kauth_cred_ngroups(cred1) != kauth_cred_ngroups(cred2)) 1002 return (0); 1003 do_ngroups = kauth_cred_ngroups(cred1); 1004 for (i = 0; i < do_ngroups; i++) 1005 if (kauth_cred_group(cred1, i) != 1006 kauth_cred_group(cred2, i)) 1007 return (0); 1008 1009 return (1); 1010 } 1011 1012 /* 1013 * NFS write service with write gathering support. Called when 1014 * nfsrvw_procrastinate > 0. 1015 * See: Chet Juszczak, "Improving the Write Performance of an NFS Server", 1016 * in Proc. of the Winter 1994 Usenix Conference, pg. 247-259, San Franscisco, 1017 * Jan. 1994. 1018 */ 1019 int 1020 nfsrv_writegather(ndp, slp, lwp, mrq) 1021 struct nfsrv_descript **ndp; 1022 struct nfssvc_sock *slp; 1023 struct lwp *lwp; 1024 struct mbuf **mrq; 1025 { 1026 struct iovec *ivp; 1027 struct mbuf *mp; 1028 struct nfsrv_descript *wp, *nfsd, *owp, *swp; 1029 struct nfs_fattr *fp; 1030 int i = 0; 1031 struct iovec *iov; 1032 struct nfsrvw_delayhash *wpp; 1033 kauth_cred_t cred; 1034 struct vattr va, forat; 1035 u_int32_t *tl; 1036 int32_t t1; 1037 caddr_t bpos, dpos; 1038 int error = 0, rdonly, cache = 0, len = 0, forat_ret = 1; 1039 int ioflags, aftat_ret = 1, s, adjust, v3, zeroing; 1040 char *cp2; 1041 struct mbuf *mb, *mreq, *mrep, *md; 1042 struct vnode *vp; 1043 struct uio io, *uiop = &io; 1044 u_quad_t frev, cur_usec; 1045 struct mount *mntp = NULL; 1046 1047 *mrq = NULL; 1048 if (*ndp) { 1049 nfsd = *ndp; 1050 *ndp = NULL; 1051 mrep = nfsd->nd_mrep; 1052 md = nfsd->nd_md; 1053 dpos = nfsd->nd_dpos; 1054 cred = nfsd->nd_cr; 1055 v3 = (nfsd->nd_flag & ND_NFSV3); 1056 LIST_INIT(&nfsd->nd_coalesce); 1057 nfsd->nd_mreq = NULL; 1058 nfsd->nd_stable = NFSV3WRITE_FILESYNC; 1059 cur_usec = (u_quad_t)time.tv_sec * 1000000 + (u_quad_t)time.tv_usec; 1060 nfsd->nd_time = cur_usec + nfsrvw_procrastinate; 1061 1062 /* 1063 * Now, get the write header.. 1064 */ 1065 nfsm_srvmtofh(&nfsd->nd_fh); 1066 if (v3) { 1067 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 1068 nfsd->nd_off = fxdr_hyper(tl); 1069 tl += 3; 1070 nfsd->nd_stable = fxdr_unsigned(int, *tl++); 1071 } else { 1072 nfsm_dissect(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1073 nfsd->nd_off = (off_t)fxdr_unsigned(u_int32_t, *++tl); 1074 tl += 2; 1075 } 1076 len = fxdr_unsigned(int32_t, *tl); 1077 nfsd->nd_len = len; 1078 nfsd->nd_eoff = nfsd->nd_off + len; 1079 1080 /* 1081 * Trim the header out of the mbuf list and trim off any trailing 1082 * junk so that the mbuf list has only the write data. 1083 */ 1084 zeroing = 1; 1085 i = 0; 1086 mp = mrep; 1087 while (mp) { 1088 if (mp == md) { 1089 zeroing = 0; 1090 adjust = dpos - mtod(mp, caddr_t); 1091 mp->m_len -= adjust; 1092 if (mp->m_len > 0 && adjust > 0) 1093 NFSMADV(mp, adjust); 1094 } 1095 if (zeroing) 1096 mp->m_len = 0; 1097 else { 1098 i += mp->m_len; 1099 if (i > len) { 1100 mp->m_len -= (i - len); 1101 zeroing = 1; 1102 } 1103 } 1104 mp = mp->m_next; 1105 } 1106 if (len > NFS_MAXDATA || len < 0 || i < len) { 1107 nfsmout: 1108 m_freem(mrep); 1109 error = EIO; 1110 nfsm_writereply(2 * NFSX_UNSIGNED, v3); 1111 if (v3) 1112 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1113 nfsd->nd_mreq = mreq; 1114 nfsd->nd_mrep = NULL; 1115 nfsd->nd_time = 0; 1116 } 1117 1118 /* 1119 * Add this entry to the hash and time queues. 1120 */ 1121 s = splsoftclock(); 1122 owp = NULL; 1123 wp = LIST_FIRST(&slp->ns_tq); 1124 while (wp && wp->nd_time < nfsd->nd_time) { 1125 owp = wp; 1126 wp = LIST_NEXT(wp, nd_tq); 1127 } 1128 if (owp) { 1129 LIST_INSERT_AFTER(owp, nfsd, nd_tq); 1130 } else { 1131 LIST_INSERT_HEAD(&slp->ns_tq, nfsd, nd_tq); 1132 } 1133 if (nfsd->nd_mrep) { 1134 wpp = NWDELAYHASH(slp, nfsd->nd_fh.fh_fid.fid_data); 1135 owp = NULL; 1136 wp = LIST_FIRST(wpp); 1137 while (wp && 1138 memcmp(&nfsd->nd_fh, &wp->nd_fh, NFSX_V3FH)) { 1139 owp = wp; 1140 wp = LIST_NEXT(wp, nd_hash); 1141 } 1142 while (wp && wp->nd_off < nfsd->nd_off && 1143 !memcmp(&nfsd->nd_fh, &wp->nd_fh, NFSX_V3FH)) { 1144 owp = wp; 1145 wp = LIST_NEXT(wp, nd_hash); 1146 } 1147 if (owp) { 1148 LIST_INSERT_AFTER(owp, nfsd, nd_hash); 1149 1150 /* 1151 * Search the hash list for overlapping entries and 1152 * coalesce. 1153 */ 1154 for(; nfsd && NFSW_CONTIG(owp, nfsd); nfsd = wp) { 1155 wp = LIST_NEXT(nfsd, nd_hash); 1156 if (nfsrv_samecred(owp->nd_cr, nfsd->nd_cr)) 1157 nfsrvw_coalesce(owp, nfsd); 1158 } 1159 } else { 1160 LIST_INSERT_HEAD(wpp, nfsd, nd_hash); 1161 } 1162 } 1163 splx(s); 1164 } 1165 1166 /* 1167 * Now, do VOP_WRITE()s for any one(s) that need to be done now 1168 * and generate the associated reply mbuf list(s). 1169 */ 1170 loop1: 1171 cur_usec = (u_quad_t)time.tv_sec * 1000000 + (u_quad_t)time.tv_usec; 1172 s = splsoftclock(); 1173 for (nfsd = LIST_FIRST(&slp->ns_tq); nfsd; nfsd = owp) { 1174 owp = LIST_NEXT(nfsd, nd_tq); 1175 if (nfsd->nd_time > cur_usec) 1176 break; 1177 if (nfsd->nd_mreq) 1178 continue; 1179 LIST_REMOVE(nfsd, nd_tq); 1180 LIST_REMOVE(nfsd, nd_hash); 1181 splx(s); 1182 mrep = nfsd->nd_mrep; 1183 nfsd->nd_mrep = NULL; 1184 cred = nfsd->nd_cr; 1185 v3 = (nfsd->nd_flag & ND_NFSV3); 1186 forat_ret = aftat_ret = 1; 1187 error = nfsrv_fhtovp(&nfsd->nd_fh, 1, &vp, cred, slp, 1188 nfsd->nd_nam, &rdonly, (nfsd->nd_flag & ND_KERBAUTH), 1189 FALSE); 1190 if (!error) { 1191 if (v3) 1192 forat_ret = VOP_GETATTR(vp, &forat, cred, lwp); 1193 if (vp->v_type != VREG) { 1194 if (v3) 1195 error = EINVAL; 1196 else 1197 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 1198 } 1199 } else 1200 vp = NULL; 1201 if (!error) { 1202 nqsrv_getl(vp, ND_WRITE); 1203 error = nfsrv_access(vp, VWRITE, cred, rdonly, lwp, 1); 1204 } 1205 1206 if (nfsd->nd_stable == NFSV3WRITE_UNSTABLE) 1207 ioflags = IO_NODELOCKED; 1208 else if (nfsd->nd_stable == NFSV3WRITE_DATASYNC) 1209 ioflags = (IO_SYNC | IO_NODELOCKED); 1210 else 1211 ioflags = (IO_METASYNC | IO_SYNC | IO_NODELOCKED); 1212 uiop->uio_rw = UIO_WRITE; 1213 uiop->uio_offset = nfsd->nd_off; 1214 uiop->uio_resid = nfsd->nd_eoff - nfsd->nd_off; 1215 UIO_SETUP_SYSSPACE(uiop); 1216 if (uiop->uio_resid > 0) { 1217 mp = mrep; 1218 i = 0; 1219 while (mp) { 1220 if (mp->m_len > 0) 1221 i++; 1222 mp = mp->m_next; 1223 } 1224 uiop->uio_iovcnt = i; 1225 iov = malloc(i * sizeof (struct iovec), M_TEMP, M_WAITOK); 1226 uiop->uio_iov = ivp = iov; 1227 mp = mrep; 1228 while (mp) { 1229 if (mp->m_len > 0) { 1230 ivp->iov_base = mtod(mp, caddr_t); 1231 ivp->iov_len = mp->m_len; 1232 ivp++; 1233 } 1234 mp = mp->m_next; 1235 } 1236 if (!error) { 1237 if (vn_start_write(vp, &mntp, V_NOWAIT) != 0) { 1238 VOP_UNLOCK(vp, 0); 1239 vn_start_write(NULL, &mntp, V_WAIT); 1240 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 1241 } 1242 if (!error) { 1243 error = VOP_WRITE(vp, uiop, ioflags, cred); 1244 nfsstats.srvvop_writes++; 1245 vn_finished_write(mntp, 0); 1246 } 1247 } 1248 free((caddr_t)iov, M_TEMP); 1249 } 1250 m_freem(mrep); 1251 if (vp) { 1252 aftat_ret = VOP_GETATTR(vp, &va, cred, lwp); 1253 vput(vp); 1254 } 1255 1256 /* 1257 * Loop around generating replies for all write rpcs that have 1258 * now been completed. 1259 */ 1260 swp = nfsd; 1261 do { 1262 if (error) { 1263 nfsm_writereply(NFSX_WCCDATA(v3), v3); 1264 if (v3) { 1265 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1266 } 1267 } else { 1268 nfsm_writereply(NFSX_PREOPATTR(v3) + 1269 NFSX_POSTOPORFATTR(v3) + 2 * NFSX_UNSIGNED + 1270 NFSX_WRITEVERF(v3), v3); 1271 if (v3) { 1272 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1273 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1274 *tl++ = txdr_unsigned(nfsd->nd_len); 1275 *tl++ = txdr_unsigned(swp->nd_stable); 1276 /* 1277 * Actually, there is no need to txdr these fields, 1278 * but it may make the values more human readable, 1279 * for debugging purposes. 1280 */ 1281 *tl++ = txdr_unsigned(boottime.tv_sec); 1282 *tl = txdr_unsigned(boottime.tv_usec); 1283 } else { 1284 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 1285 nfsm_srvfillattr(&va, fp); 1286 } 1287 } 1288 nfsd->nd_mreq = mreq; 1289 if (nfsd->nd_mrep) 1290 panic("nfsrv_write: nd_mrep not free"); 1291 1292 /* 1293 * Done. Put it at the head of the timer queue so that 1294 * the final phase can return the reply. 1295 */ 1296 s = splsoftclock(); 1297 if (nfsd != swp) { 1298 nfsd->nd_time = 0; 1299 LIST_INSERT_HEAD(&slp->ns_tq, nfsd, nd_tq); 1300 } 1301 nfsd = LIST_FIRST(&swp->nd_coalesce); 1302 if (nfsd) { 1303 LIST_REMOVE(nfsd, nd_tq); 1304 } 1305 splx(s); 1306 } while (nfsd); 1307 s = splsoftclock(); 1308 swp->nd_time = 0; 1309 LIST_INSERT_HEAD(&slp->ns_tq, swp, nd_tq); 1310 splx(s); 1311 goto loop1; 1312 } 1313 splx(s); 1314 1315 /* 1316 * Search for a reply to return. 1317 */ 1318 s = splsoftclock(); 1319 LIST_FOREACH(nfsd, &slp->ns_tq, nd_tq) { 1320 if (nfsd->nd_mreq) { 1321 LIST_REMOVE(nfsd, nd_tq); 1322 *mrq = nfsd->nd_mreq; 1323 *ndp = nfsd; 1324 break; 1325 } 1326 } 1327 splx(s); 1328 return (0); 1329 } 1330 1331 /* 1332 * Coalesce the write request nfsd into owp. To do this we must: 1333 * - remove nfsd from the queues 1334 * - merge nfsd->nd_mrep into owp->nd_mrep 1335 * - update the nd_eoff and nd_stable for owp 1336 * - put nfsd on owp's nd_coalesce list 1337 * NB: Must be called at splsoftclock(). 1338 */ 1339 void 1340 nfsrvw_coalesce(owp, nfsd) 1341 struct nfsrv_descript *owp; 1342 struct nfsrv_descript *nfsd; 1343 { 1344 int overlap; 1345 struct mbuf *mp; 1346 struct nfsrv_descript *m; 1347 1348 LIST_REMOVE(nfsd, nd_hash); 1349 LIST_REMOVE(nfsd, nd_tq); 1350 if (owp->nd_eoff < nfsd->nd_eoff) { 1351 overlap = owp->nd_eoff - nfsd->nd_off; 1352 if (overlap < 0) 1353 panic("nfsrv_coalesce: bad off"); 1354 if (overlap > 0) 1355 m_adj(nfsd->nd_mrep, overlap); 1356 mp = owp->nd_mrep; 1357 while (mp->m_next) 1358 mp = mp->m_next; 1359 mp->m_next = nfsd->nd_mrep; 1360 owp->nd_eoff = nfsd->nd_eoff; 1361 } else 1362 m_freem(nfsd->nd_mrep); 1363 nfsd->nd_mrep = NULL; 1364 if (nfsd->nd_stable == NFSV3WRITE_FILESYNC) 1365 owp->nd_stable = NFSV3WRITE_FILESYNC; 1366 else if (nfsd->nd_stable == NFSV3WRITE_DATASYNC && 1367 owp->nd_stable == NFSV3WRITE_UNSTABLE) 1368 owp->nd_stable = NFSV3WRITE_DATASYNC; 1369 LIST_INSERT_HEAD(&owp->nd_coalesce, nfsd, nd_tq); 1370 /* 1371 * nfsd might hold coalesce elements! Move them to owp. 1372 * Otherwise, requests may be lost and clients will be stuck. 1373 */ 1374 while ((m = LIST_FIRST(&nfsd->nd_coalesce)) != NULL) { 1375 LIST_REMOVE(m, nd_tq); 1376 LIST_INSERT_HEAD(&owp->nd_coalesce, m, nd_tq); 1377 } 1378 } 1379 1380 /* 1381 * nfs create service 1382 * now does a truncate to 0 length via. setattr if it already exists 1383 */ 1384 int 1385 nfsrv_create(nfsd, slp, lwp, mrq) 1386 struct nfsrv_descript *nfsd; 1387 struct nfssvc_sock *slp; 1388 struct lwp *lwp; 1389 struct mbuf **mrq; 1390 { 1391 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1392 struct mbuf *nam = nfsd->nd_nam; 1393 caddr_t dpos = nfsd->nd_dpos; 1394 kauth_cred_t cred = nfsd->nd_cr; 1395 struct nfs_fattr *fp; 1396 struct vattr va, dirfor, diraft; 1397 struct nfsv2_sattr *sp; 1398 u_int32_t *tl; 1399 struct nameidata nd; 1400 caddr_t cp; 1401 int32_t t1; 1402 caddr_t bpos; 1403 int error = 0, cache = 0, len, tsize, dirfor_ret = 1, diraft_ret = 1; 1404 int rdev = 0; 1405 int v3 = (nfsd->nd_flag & ND_NFSV3), how, exclusive_flag = 0; 1406 char *cp2; 1407 struct mbuf *mb, *mreq; 1408 struct vnode *vp = NULL, *dirp = NULL; 1409 nfsfh_t nfh; 1410 fhandle_t *fhp; 1411 u_quad_t frev, tempsize; 1412 u_char cverf[NFSX_V3CREATEVERF]; 1413 struct mount *mp = NULL; 1414 1415 nd.ni_cnd.cn_nameiop = 0; 1416 fhp = &nfh.fh_generic; 1417 nfsm_srvmtofh(fhp); 1418 if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) 1419 return (ESTALE); 1420 vn_start_write(NULL, &mp, V_WAIT); 1421 nfsm_srvnamesiz(len); 1422 nd.ni_cnd.cn_cred = cred; 1423 nd.ni_cnd.cn_nameiop = CREATE; 1424 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 1425 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 1426 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1427 if (dirp) { 1428 if (v3) 1429 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, lwp); 1430 else { 1431 vrele(dirp); 1432 dirp = (struct vnode *)0; 1433 } 1434 } 1435 if (error) { 1436 nfsm_reply(NFSX_WCCDATA(v3)); 1437 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1438 if (dirp) 1439 vrele(dirp); 1440 vn_finished_write(mp, 0); 1441 return (0); 1442 } 1443 VATTR_NULL(&va); 1444 if (v3) { 1445 va.va_mode = 0; 1446 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1447 how = fxdr_unsigned(int, *tl); 1448 switch (how) { 1449 case NFSV3CREATE_GUARDED: 1450 if (nd.ni_vp) { 1451 error = EEXIST; 1452 break; 1453 } 1454 case NFSV3CREATE_UNCHECKED: 1455 nfsm_srvsattr(&va); 1456 break; 1457 case NFSV3CREATE_EXCLUSIVE: 1458 nfsm_dissect(cp, caddr_t, NFSX_V3CREATEVERF); 1459 memcpy(cverf, cp, NFSX_V3CREATEVERF); 1460 exclusive_flag = 1; 1461 break; 1462 }; 1463 va.va_type = VREG; 1464 } else { 1465 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1466 va.va_type = IFTOVT(fxdr_unsigned(u_int32_t, sp->sa_mode)); 1467 if (va.va_type == VNON) 1468 va.va_type = VREG; 1469 va.va_mode = nfstov_mode(sp->sa_mode); 1470 switch (va.va_type) { 1471 case VREG: 1472 tsize = fxdr_unsigned(int32_t, sp->sa_size); 1473 if (tsize != -1) 1474 va.va_size = (u_quad_t)tsize; 1475 break; 1476 case VCHR: 1477 case VBLK: 1478 case VFIFO: 1479 rdev = fxdr_unsigned(int32_t, sp->sa_size); 1480 break; 1481 default: 1482 break; 1483 }; 1484 } 1485 1486 /* 1487 * Iff doesn't exist, create it 1488 * otherwise just truncate to 0 length 1489 * should I set the mode too ?? 1490 */ 1491 if (nd.ni_vp == NULL) { 1492 if (va.va_type == VREG || va.va_type == VSOCK) { 1493 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1494 error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1495 if (!error) { 1496 if (exclusive_flag) { 1497 exclusive_flag = 0; 1498 VATTR_NULL(&va); 1499 /* 1500 * XXX 1501 * assuming NFSX_V3CREATEVERF 1502 * == sizeof(nfstime3) 1503 */ 1504 fxdr_nfsv3time(cverf, &va.va_atime); 1505 error = VOP_SETATTR(nd.ni_vp, &va, cred, 1506 lwp); 1507 } 1508 } 1509 } else if (va.va_type == VCHR || va.va_type == VBLK || 1510 va.va_type == VFIFO) { 1511 if (va.va_type == VCHR && rdev == 0xffffffff) 1512 va.va_type = VFIFO; 1513 if (va.va_type != VFIFO && 1514 (error = kauth_authorize_generic(cred, 1515 KAUTH_GENERIC_ISSUSER, (u_short *)0))) { 1516 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1517 vput(nd.ni_dvp); 1518 nfsm_reply(0); 1519 vn_finished_write(mp, 0); 1520 return (error); 1521 } else 1522 va.va_rdev = (dev_t)rdev; 1523 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1524 error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, 1525 &va); 1526 if (error) { 1527 nfsm_reply(0); 1528 } 1529 if (nd.ni_cnd.cn_flags & ISSYMLINK) { 1530 vrele(nd.ni_dvp); 1531 vput(nd.ni_vp); 1532 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1533 error = EINVAL; 1534 nfsm_reply(0); 1535 } 1536 } else { 1537 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1538 vput(nd.ni_dvp); 1539 error = ENXIO; 1540 } 1541 vp = nd.ni_vp; 1542 } else { 1543 vp = nd.ni_vp; 1544 if (nd.ni_dvp == vp) 1545 vrele(nd.ni_dvp); 1546 else 1547 vput(nd.ni_dvp); 1548 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1549 if (!error && va.va_size != -1) { 1550 error = nfsrv_access(vp, VWRITE, cred, 1551 (nd.ni_cnd.cn_flags & RDONLY), lwp, 0); 1552 if (!error) { 1553 nqsrv_getl(vp, ND_WRITE); 1554 tempsize = va.va_size; 1555 VATTR_NULL(&va); 1556 va.va_size = tempsize; 1557 error = VOP_SETATTR(vp, &va, cred, lwp); 1558 } 1559 } 1560 if (error) 1561 vput(vp); 1562 } 1563 if (!error) { 1564 memset((caddr_t)fhp, 0, sizeof(nfh)); 1565 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsidx; 1566 error = VFS_VPTOFH(vp, &fhp->fh_fid); 1567 if (!error) 1568 error = VOP_GETATTR(vp, &va, cred, lwp); 1569 vput(vp); 1570 KASSERT(fhp->fh_fid.fid_len <= _VFS_MAXFIDSZ); 1571 } 1572 if (v3) { 1573 if (exclusive_flag && !error) { 1574 /* 1575 * XXX assuming NFSX_V3CREATEVERF == sizeof(nfstime3) 1576 */ 1577 char oldverf[NFSX_V3CREATEVERF]; 1578 1579 txdr_nfsv3time(&va.va_atime, oldverf); 1580 if (memcmp(cverf, oldverf, NFSX_V3CREATEVERF)) 1581 error = EEXIST; 1582 } 1583 if (dirp) { 1584 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, lwp); 1585 vrele(dirp); 1586 } 1587 } 1588 nfsm_reply(NFSX_SRVFH(v3) + NFSX_FATTR(v3) + NFSX_WCCDATA(v3)); 1589 if (v3) { 1590 if (!error) { 1591 nfsm_srvpostop_fh(fhp); 1592 nfsm_srvpostop_attr(0, &va); 1593 } 1594 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1595 } else { 1596 nfsm_srvfhtom(fhp, v3); 1597 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 1598 nfsm_srvfillattr(&va, fp); 1599 } 1600 vn_finished_write(mp, 0); 1601 return (0); 1602 nfsmout: 1603 if (dirp) 1604 vrele(dirp); 1605 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1606 if (nd.ni_dvp == nd.ni_vp) 1607 vrele(nd.ni_dvp); 1608 else 1609 vput(nd.ni_dvp); 1610 if (nd.ni_vp) 1611 vput(nd.ni_vp); 1612 vn_finished_write(mp, 0); 1613 return (error); 1614 } 1615 1616 /* 1617 * nfs v3 mknod service 1618 */ 1619 int 1620 nfsrv_mknod(nfsd, slp, lwp, mrq) 1621 struct nfsrv_descript *nfsd; 1622 struct nfssvc_sock *slp; 1623 struct lwp *lwp; 1624 struct mbuf **mrq; 1625 { 1626 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1627 struct mbuf *nam = nfsd->nd_nam; 1628 caddr_t dpos = nfsd->nd_dpos; 1629 kauth_cred_t cred = nfsd->nd_cr; 1630 struct vattr va, dirfor, diraft; 1631 u_int32_t *tl; 1632 struct nameidata nd; 1633 int32_t t1; 1634 caddr_t bpos; 1635 int error = 0, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 1636 u_int32_t major, minor; 1637 enum vtype vtyp; 1638 char *cp2; 1639 struct mbuf *mb, *mreq; 1640 struct vnode *vp, *dirp = (struct vnode *)0; 1641 nfsfh_t nfh; 1642 fhandle_t *fhp; 1643 u_quad_t frev; 1644 struct mount *mp = NULL; 1645 1646 nd.ni_cnd.cn_nameiop = 0; 1647 fhp = &nfh.fh_generic; 1648 nfsm_srvmtofh(fhp); 1649 if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) 1650 return (ESTALE); 1651 vn_start_write(NULL, &mp, V_WAIT); 1652 nfsm_srvnamesiz(len); 1653 nd.ni_cnd.cn_cred = cred; 1654 nd.ni_cnd.cn_nameiop = CREATE; 1655 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 1656 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 1657 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1658 if (dirp) 1659 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, lwp); 1660 if (error) { 1661 nfsm_reply(NFSX_WCCDATA(1)); 1662 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1663 if (dirp) 1664 vrele(dirp); 1665 vn_finished_write(mp, 0); 1666 return (0); 1667 } 1668 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1669 vtyp = nfsv3tov_type(*tl); 1670 if (vtyp != VCHR && vtyp != VBLK && vtyp != VSOCK && vtyp != VFIFO) { 1671 error = NFSERR_BADTYPE; 1672 goto abort; 1673 } 1674 VATTR_NULL(&va); 1675 va.va_mode = 0; 1676 nfsm_srvsattr(&va); 1677 if (vtyp == VCHR || vtyp == VBLK) { 1678 dev_t rdev; 1679 1680 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1681 major = fxdr_unsigned(u_int32_t, *tl++); 1682 minor = fxdr_unsigned(u_int32_t, *tl); 1683 rdev = makedev(major, minor); 1684 if (major(rdev) != major || minor(rdev) != minor) { 1685 error = EINVAL; 1686 goto abort; 1687 } 1688 va.va_rdev = rdev; 1689 } 1690 1691 /* 1692 * Iff doesn't exist, create it. 1693 */ 1694 if (nd.ni_vp) { 1695 error = EEXIST; 1696 abort: 1697 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1698 if (nd.ni_dvp == nd.ni_vp) 1699 vrele(nd.ni_dvp); 1700 else 1701 vput(nd.ni_dvp); 1702 if (nd.ni_vp) 1703 vput(nd.ni_vp); 1704 goto out; 1705 } 1706 va.va_type = vtyp; 1707 if (vtyp == VSOCK) { 1708 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1709 error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1710 } else { 1711 if (va.va_type != VFIFO && 1712 (error = kauth_authorize_generic(cred, KAUTH_GENERIC_ISSUSER, 1713 (u_short *)0))) { 1714 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1715 vput(nd.ni_dvp); 1716 goto out; 1717 } 1718 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1719 error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1720 if (error) 1721 goto out; 1722 if (nd.ni_cnd.cn_flags & ISSYMLINK) { 1723 vput(nd.ni_vp); 1724 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1725 error = EINVAL; 1726 } 1727 } 1728 out: 1729 vp = nd.ni_vp; 1730 if (!error) { 1731 memset((caddr_t)fhp, 0, sizeof(nfh)); 1732 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsidx; 1733 error = VFS_VPTOFH(vp, &fhp->fh_fid); 1734 if (!error) 1735 error = VOP_GETATTR(vp, &va, cred, lwp); 1736 vput(vp); 1737 KASSERT(fhp->fh_fid.fid_len <= _VFS_MAXFIDSZ); 1738 } 1739 if (dirp) { 1740 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, lwp); 1741 vrele(dirp); 1742 } 1743 nfsm_reply(NFSX_SRVFH(1) + NFSX_POSTOPATTR(1) + NFSX_WCCDATA(1)); 1744 if (!error) { 1745 nfsm_srvpostop_fh(fhp); 1746 nfsm_srvpostop_attr(0, &va); 1747 } 1748 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1749 vn_finished_write(mp, 0); 1750 return (0); 1751 nfsmout: 1752 if (dirp) 1753 vrele(dirp); 1754 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1755 if (nd.ni_dvp == nd.ni_vp) 1756 vrele(nd.ni_dvp); 1757 else 1758 vput(nd.ni_dvp); 1759 if (nd.ni_vp) 1760 vput(nd.ni_vp); 1761 vn_finished_write(mp, 0); 1762 return (error); 1763 } 1764 1765 /* 1766 * nfs remove service 1767 */ 1768 int 1769 nfsrv_remove(nfsd, slp, lwp, mrq) 1770 struct nfsrv_descript *nfsd; 1771 struct nfssvc_sock *slp; 1772 struct lwp *lwp; 1773 struct mbuf **mrq; 1774 { 1775 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1776 struct mbuf *nam = nfsd->nd_nam; 1777 caddr_t dpos = nfsd->nd_dpos; 1778 kauth_cred_t cred = nfsd->nd_cr; 1779 struct nameidata nd; 1780 u_int32_t *tl; 1781 int32_t t1; 1782 caddr_t bpos; 1783 int error = 0, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 1784 int v3 = (nfsd->nd_flag & ND_NFSV3); 1785 char *cp2; 1786 struct mbuf *mb, *mreq; 1787 struct vnode *vp, *dirp; 1788 struct vattr dirfor, diraft; 1789 nfsfh_t nfh; 1790 fhandle_t *fhp; 1791 u_quad_t frev; 1792 struct mount *mp = NULL; 1793 1794 #ifndef nolint 1795 vp = (struct vnode *)0; 1796 #endif 1797 fhp = &nfh.fh_generic; 1798 nfsm_srvmtofh(fhp); 1799 if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) 1800 return (ESTALE); 1801 vn_start_write(NULL, &mp, V_WAIT); 1802 nfsm_srvnamesiz(len); 1803 nd.ni_cnd.cn_cred = cred; 1804 nd.ni_cnd.cn_nameiop = DELETE; 1805 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 1806 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 1807 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1808 if (dirp) { 1809 if (v3) 1810 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, lwp); 1811 else 1812 vrele(dirp); 1813 } 1814 if (!error) { 1815 vp = nd.ni_vp; 1816 if (vp->v_type == VDIR && 1817 (error = kauth_authorize_generic(cred, KAUTH_GENERIC_ISSUSER, 1818 (u_short *)0)) != 0) 1819 goto out; 1820 /* 1821 * The root of a mounted filesystem cannot be deleted. 1822 */ 1823 if (vp->v_flag & VROOT) { 1824 error = EBUSY; 1825 goto out; 1826 } 1827 out: 1828 if (!error) { 1829 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1830 nqsrv_getl(vp, ND_WRITE); 1831 error = VOP_REMOVE(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); 1832 } else { 1833 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1834 if (nd.ni_dvp == vp) 1835 vrele(nd.ni_dvp); 1836 else 1837 vput(nd.ni_dvp); 1838 vput(vp); 1839 } 1840 } 1841 if (dirp && v3) { 1842 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, lwp); 1843 vrele(dirp); 1844 } 1845 nfsm_reply(NFSX_WCCDATA(v3)); 1846 if (v3) { 1847 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1848 vn_finished_write(mp, 0); 1849 return (0); 1850 } 1851 vn_finished_write(mp, 0); 1852 nfsm_srvdone; 1853 } 1854 1855 /* 1856 * nfs rename service 1857 */ 1858 int 1859 nfsrv_rename(nfsd, slp, lwp, mrq) 1860 struct nfsrv_descript *nfsd; 1861 struct nfssvc_sock *slp; 1862 struct lwp *lwp; 1863 struct mbuf **mrq; 1864 { 1865 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1866 struct mbuf *nam = nfsd->nd_nam; 1867 caddr_t dpos = nfsd->nd_dpos; 1868 kauth_cred_t cred = nfsd->nd_cr; 1869 u_int32_t *tl; 1870 int32_t t1; 1871 caddr_t bpos; 1872 int error = 0, cache = 0, fdirfor_ret = 1, fdiraft_ret = 1; 1873 uint32_t len, len2; 1874 int tdirfor_ret = 1, tdiraft_ret = 1; 1875 int v3 = (nfsd->nd_flag & ND_NFSV3); 1876 char *cp2; 1877 struct mbuf *mb, *mreq; 1878 struct nameidata fromnd, tond; 1879 struct vnode *fvp, *tvp, *tdvp, *fdirp = (struct vnode *)0; 1880 struct vnode *tdirp = (struct vnode *)0; 1881 struct vattr fdirfor, fdiraft, tdirfor, tdiraft; 1882 nfsfh_t fnfh, tnfh; 1883 fhandle_t *ffhp, *tfhp; 1884 u_quad_t frev; 1885 uid_t saved_uid; 1886 struct mount *mp = NULL; 1887 1888 #ifndef nolint 1889 fvp = (struct vnode *)0; 1890 #endif 1891 ffhp = &fnfh.fh_generic; 1892 tfhp = &tnfh.fh_generic; 1893 fromnd.ni_cnd.cn_nameiop = 0; 1894 tond.ni_cnd.cn_nameiop = 0; 1895 nfsm_srvmtofh(ffhp); 1896 if ((mp = vfs_getvfs(&ffhp->fh_fsid)) == NULL) 1897 return (ESTALE); 1898 vn_start_write(NULL, &mp, V_WAIT); 1899 nfsm_srvnamesiz(len); 1900 /* 1901 * Remember our original uid so that we can reset cr_uid before 1902 * the second nfs_namei() call, in case it is remapped. 1903 */ 1904 saved_uid = kauth_cred_geteuid(cred); 1905 fromnd.ni_cnd.cn_cred = cred; 1906 fromnd.ni_cnd.cn_nameiop = DELETE; 1907 fromnd.ni_cnd.cn_flags = WANTPARENT | SAVESTART; 1908 error = nfs_namei(&fromnd, ffhp, len, slp, nam, &md, 1909 &dpos, &fdirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1910 if (fdirp) { 1911 if (v3) 1912 fdirfor_ret = VOP_GETATTR(fdirp, &fdirfor, cred, lwp); 1913 else { 1914 vrele(fdirp); 1915 fdirp = (struct vnode *)0; 1916 } 1917 } 1918 if (error) { 1919 nfsm_reply(2 * NFSX_WCCDATA(v3)); 1920 nfsm_srvwcc_data(fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft); 1921 nfsm_srvwcc_data(tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft); 1922 if (fdirp) 1923 vrele(fdirp); 1924 vn_finished_write(mp, 0); 1925 return (0); 1926 } 1927 fvp = fromnd.ni_vp; 1928 nfsm_srvmtofh(tfhp); 1929 if (v3) { 1930 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 1931 len2 = fxdr_unsigned(uint32_t, *tl); 1932 /* len2 will be checked by nfs_namei */ 1933 } 1934 else { 1935 /* NFSv2 */ 1936 nfsm_strsiz(len2, NFS_MAXNAMLEN); 1937 } 1938 kauth_cred_seteuid(cred, saved_uid); 1939 tond.ni_cnd.cn_cred = cred; 1940 tond.ni_cnd.cn_nameiop = RENAME; 1941 tond.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF | NOCACHE | SAVESTART; 1942 error = nfs_namei(&tond, tfhp, len2, slp, nam, &md, 1943 &dpos, &tdirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1944 if (tdirp) { 1945 if (v3) 1946 tdirfor_ret = VOP_GETATTR(tdirp, &tdirfor, cred, lwp); 1947 else { 1948 vrele(tdirp); 1949 tdirp = (struct vnode *)0; 1950 } 1951 } 1952 if (error) { 1953 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 1954 vrele(fromnd.ni_dvp); 1955 vrele(fvp); 1956 goto out1; 1957 } 1958 tdvp = tond.ni_dvp; 1959 tvp = tond.ni_vp; 1960 if (tvp != NULL) { 1961 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 1962 if (v3) 1963 error = EEXIST; 1964 else 1965 error = EISDIR; 1966 goto out; 1967 } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 1968 if (v3) 1969 error = EEXIST; 1970 else 1971 error = ENOTDIR; 1972 goto out; 1973 } 1974 if (tvp->v_type == VDIR && tvp->v_mountedhere) { 1975 if (v3) 1976 error = EXDEV; 1977 else 1978 error = ENOTEMPTY; 1979 goto out; 1980 } 1981 } 1982 if (fvp->v_type == VDIR && fvp->v_mountedhere) { 1983 if (v3) 1984 error = EXDEV; 1985 else 1986 error = ENOTEMPTY; 1987 goto out; 1988 } 1989 if (fvp->v_mount != tdvp->v_mount) { 1990 if (v3) 1991 error = EXDEV; 1992 else 1993 error = ENOTEMPTY; 1994 goto out; 1995 } 1996 if (fvp == tdvp) { 1997 if (v3) 1998 error = EINVAL; 1999 else 2000 error = ENOTEMPTY; 2001 } 2002 /* 2003 * If source is the same as the destination (that is the 2004 * same vnode with the same name in the same directory), 2005 * then there is nothing to do. 2006 */ 2007 if (fvp == tvp && fromnd.ni_dvp == tdvp && 2008 fromnd.ni_cnd.cn_namelen == tond.ni_cnd.cn_namelen && 2009 !memcmp(fromnd.ni_cnd.cn_nameptr, tond.ni_cnd.cn_nameptr, 2010 fromnd.ni_cnd.cn_namelen)) 2011 error = -1; 2012 out: 2013 if (!error) { 2014 nqsrv_getl(fromnd.ni_dvp, ND_WRITE); 2015 nqsrv_getl(tdvp, ND_WRITE); 2016 if (tvp) { 2017 nqsrv_getl(tvp, ND_WRITE); 2018 } 2019 error = VOP_RENAME(fromnd.ni_dvp, fromnd.ni_vp, &fromnd.ni_cnd, 2020 tond.ni_dvp, tond.ni_vp, &tond.ni_cnd); 2021 } else { 2022 VOP_ABORTOP(tond.ni_dvp, &tond.ni_cnd); 2023 if (tdvp == tvp) 2024 vrele(tdvp); 2025 else 2026 vput(tdvp); 2027 if (tvp) 2028 vput(tvp); 2029 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 2030 vrele(fromnd.ni_dvp); 2031 vrele(fvp); 2032 if (error == -1) 2033 error = 0; 2034 } 2035 vrele(tond.ni_startdir); 2036 PNBUF_PUT(tond.ni_cnd.cn_pnbuf); 2037 out1: 2038 if (fdirp) { 2039 fdiraft_ret = VOP_GETATTR(fdirp, &fdiraft, cred, lwp); 2040 vrele(fdirp); 2041 } 2042 if (tdirp) { 2043 tdiraft_ret = VOP_GETATTR(tdirp, &tdiraft, cred, lwp); 2044 vrele(tdirp); 2045 } 2046 vrele(fromnd.ni_startdir); 2047 PNBUF_PUT(fromnd.ni_cnd.cn_pnbuf); 2048 nfsm_reply(2 * NFSX_WCCDATA(v3)); 2049 if (v3) { 2050 nfsm_srvwcc_data(fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft); 2051 nfsm_srvwcc_data(tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft); 2052 } 2053 vn_finished_write(mp, 0); 2054 return (0); 2055 2056 nfsmout: 2057 if (fdirp) 2058 vrele(fdirp); 2059 #ifdef notdef 2060 if (tdirp) 2061 vrele(tdirp); 2062 #endif 2063 if (tond.ni_cnd.cn_nameiop) { 2064 vrele(tond.ni_startdir); 2065 PNBUF_PUT(tond.ni_cnd.cn_pnbuf); 2066 } 2067 if (fromnd.ni_cnd.cn_nameiop) { 2068 vrele(fromnd.ni_startdir); 2069 PNBUF_PUT(fromnd.ni_cnd.cn_pnbuf); 2070 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 2071 vrele(fromnd.ni_dvp); 2072 vrele(fvp); 2073 } 2074 return (error); 2075 } 2076 2077 /* 2078 * nfs link service 2079 */ 2080 int 2081 nfsrv_link(nfsd, slp, lwp, mrq) 2082 struct nfsrv_descript *nfsd; 2083 struct nfssvc_sock *slp; 2084 struct lwp *lwp; 2085 struct mbuf **mrq; 2086 { 2087 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2088 struct mbuf *nam = nfsd->nd_nam; 2089 caddr_t dpos = nfsd->nd_dpos; 2090 kauth_cred_t cred = nfsd->nd_cr; 2091 struct nameidata nd; 2092 u_int32_t *tl; 2093 int32_t t1; 2094 caddr_t bpos; 2095 int error = 0, rdonly, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 2096 int getret = 1, v3 = (nfsd->nd_flag & ND_NFSV3); 2097 char *cp2; 2098 struct mbuf *mb, *mreq; 2099 struct vnode *vp, *xp, *dirp = (struct vnode *)0; 2100 struct vattr dirfor, diraft, at; 2101 nfsfh_t nfh, dnfh; 2102 fhandle_t *fhp, *dfhp; 2103 u_quad_t frev; 2104 struct mount *mp = NULL; 2105 2106 fhp = &nfh.fh_generic; 2107 dfhp = &dnfh.fh_generic; 2108 nfsm_srvmtofh(fhp); 2109 if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) 2110 return (ESTALE); 2111 vn_start_write(NULL, &mp, V_WAIT); 2112 nfsm_srvmtofh(dfhp); 2113 nfsm_srvnamesiz(len); 2114 error = nfsrv_fhtovp(fhp, FALSE, &vp, cred, slp, nam, 2115 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2116 if (error) { 2117 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2118 nfsm_srvpostop_attr(getret, &at); 2119 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2120 vn_finished_write(mp, 0); 2121 return (0); 2122 } 2123 if (vp->v_type == VDIR && (error = kauth_authorize_generic(cred, 2124 KAUTH_GENERIC_ISSUSER, (u_short *)0)) != 0) 2125 goto out1; 2126 nd.ni_cnd.cn_cred = cred; 2127 nd.ni_cnd.cn_nameiop = CREATE; 2128 nd.ni_cnd.cn_flags = LOCKPARENT; 2129 error = nfs_namei(&nd, dfhp, len, slp, nam, &md, &dpos, 2130 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2131 if (dirp) { 2132 if (v3) 2133 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, lwp); 2134 else { 2135 vrele(dirp); 2136 dirp = (struct vnode *)0; 2137 } 2138 } 2139 if (error) 2140 goto out1; 2141 xp = nd.ni_vp; 2142 if (xp != NULL) { 2143 error = EEXIST; 2144 goto out; 2145 } 2146 xp = nd.ni_dvp; 2147 if (vp->v_mount != xp->v_mount) 2148 error = EXDEV; 2149 out: 2150 if (!error) { 2151 nqsrv_getl(vp, ND_WRITE); 2152 nqsrv_getl(xp, ND_WRITE); 2153 error = VOP_LINK(nd.ni_dvp, vp, &nd.ni_cnd); 2154 } else { 2155 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2156 if (nd.ni_dvp == nd.ni_vp) 2157 vrele(nd.ni_dvp); 2158 else 2159 vput(nd.ni_dvp); 2160 if (nd.ni_vp) 2161 vrele(nd.ni_vp); 2162 } 2163 out1: 2164 if (v3) 2165 getret = VOP_GETATTR(vp, &at, cred, lwp); 2166 if (dirp) { 2167 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, lwp); 2168 vrele(dirp); 2169 } 2170 vrele(vp); 2171 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2172 if (v3) { 2173 nfsm_srvpostop_attr(getret, &at); 2174 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2175 vn_finished_write(mp, 0); 2176 return (0); 2177 } 2178 vn_finished_write(mp, 0); 2179 nfsm_srvdone; 2180 } 2181 2182 /* 2183 * nfs symbolic link service 2184 */ 2185 int 2186 nfsrv_symlink(nfsd, slp, lwp, mrq) 2187 struct nfsrv_descript *nfsd; 2188 struct nfssvc_sock *slp; 2189 struct lwp *lwp; 2190 struct mbuf **mrq; 2191 { 2192 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2193 struct mbuf *nam = nfsd->nd_nam; 2194 caddr_t dpos = nfsd->nd_dpos; 2195 kauth_cred_t cred = nfsd->nd_cr; 2196 struct vattr va, dirfor, diraft; 2197 struct nameidata nd; 2198 u_int32_t *tl; 2199 int32_t t1; 2200 struct nfsv2_sattr *sp; 2201 char *bpos, *pathcp = NULL, *cp2; 2202 struct uio io; 2203 struct iovec iv; 2204 int error = 0, cache = 0, dirfor_ret = 1, diraft_ret = 1; 2205 uint32_t len, len2; 2206 int v3 = (nfsd->nd_flag & ND_NFSV3); 2207 struct mbuf *mb, *mreq; 2208 struct vnode *dirp = (struct vnode *)0; 2209 nfsfh_t nfh; 2210 fhandle_t *fhp; 2211 u_quad_t frev; 2212 struct mount *mp = NULL; 2213 2214 nd.ni_cnd.cn_nameiop = 0; 2215 fhp = &nfh.fh_generic; 2216 nfsm_srvmtofh(fhp); 2217 if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) 2218 return (ESTALE); 2219 vn_start_write(NULL, &mp, V_WAIT); 2220 nfsm_srvnamesiz(len); 2221 nd.ni_cnd.cn_cred = cred; 2222 nd.ni_cnd.cn_nameiop = CREATE; 2223 nd.ni_cnd.cn_flags = LOCKPARENT; 2224 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 2225 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2226 if (dirp) { 2227 if (v3) 2228 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, lwp); 2229 else { 2230 vrele(dirp); 2231 dirp = (struct vnode *)0; 2232 } 2233 } 2234 if (error) 2235 goto out; 2236 VATTR_NULL(&va); 2237 va.va_type = VLNK; 2238 if (v3) { 2239 va.va_mode = 0; 2240 nfsm_srvsattr(&va); 2241 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 2242 len2 = fxdr_unsigned(uint32_t, *tl); 2243 if (len2 > PATH_MAX) { 2244 /* XXX should check _PC_NO_TRUNC */ 2245 error = ENAMETOOLONG; 2246 goto abortop; 2247 } 2248 } 2249 else { 2250 /* NFSv2 */ 2251 nfsm_strsiz(len2, NFS_MAXPATHLEN); 2252 } 2253 pathcp = malloc(len2 + 1, M_TEMP, M_WAITOK); 2254 iv.iov_base = pathcp; 2255 iv.iov_len = len2; 2256 io.uio_resid = len2; 2257 io.uio_offset = 0; 2258 io.uio_iov = &iv; 2259 io.uio_iovcnt = 1; 2260 io.uio_rw = UIO_READ; 2261 UIO_SETUP_SYSSPACE(&io); 2262 nfsm_mtouio(&io, len2); 2263 if (!v3) { 2264 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2265 va.va_mode = fxdr_unsigned(u_int16_t, sp->sa_mode); 2266 } 2267 *(pathcp + len2) = '\0'; 2268 if (nd.ni_vp) { 2269 error = EEXIST; 2270 abortop: 2271 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2272 if (nd.ni_dvp == nd.ni_vp) 2273 vrele(nd.ni_dvp); 2274 else 2275 vput(nd.ni_dvp); 2276 if (nd.ni_vp) 2277 vrele(nd.ni_vp); 2278 goto out; 2279 } 2280 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2281 error = VOP_SYMLINK(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va, pathcp); 2282 if (!error) { 2283 if (v3) { 2284 memset((caddr_t)fhp, 0, sizeof(nfh)); 2285 fhp->fh_fsid = nd.ni_vp->v_mount->mnt_stat.f_fsidx; 2286 error = VFS_VPTOFH(nd.ni_vp, &fhp->fh_fid); 2287 if (!error) 2288 error = VOP_GETATTR(nd.ni_vp, &va, cred, lwp); 2289 vput(nd.ni_vp); 2290 KASSERT(fhp->fh_fid.fid_len <= _VFS_MAXFIDSZ); 2291 } else { 2292 vput(nd.ni_vp); 2293 } 2294 } 2295 out: 2296 if (pathcp) 2297 free(pathcp, M_TEMP); 2298 if (dirp) { 2299 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, lwp); 2300 vrele(dirp); 2301 } 2302 nfsm_reply(NFSX_SRVFH(v3) + NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2303 if (v3) { 2304 if (!error) { 2305 nfsm_srvpostop_fh(fhp); 2306 nfsm_srvpostop_attr(0, &va); 2307 } 2308 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2309 } 2310 vn_finished_write(mp, 0); 2311 return (0); 2312 nfsmout: 2313 if (dirp) 2314 vrele(dirp); 2315 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2316 if (nd.ni_dvp == nd.ni_vp) 2317 vrele(nd.ni_dvp); 2318 else 2319 vput(nd.ni_dvp); 2320 if (nd.ni_vp) 2321 vrele(nd.ni_vp); 2322 if (pathcp) 2323 free(pathcp, M_TEMP); 2324 vn_finished_write(mp, 0); 2325 return (error); 2326 } 2327 2328 /* 2329 * nfs mkdir service 2330 */ 2331 int 2332 nfsrv_mkdir(nfsd, slp, lwp, mrq) 2333 struct nfsrv_descript *nfsd; 2334 struct nfssvc_sock *slp; 2335 struct lwp *lwp; 2336 struct mbuf **mrq; 2337 { 2338 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2339 struct mbuf *nam = nfsd->nd_nam; 2340 caddr_t dpos = nfsd->nd_dpos; 2341 kauth_cred_t cred = nfsd->nd_cr; 2342 struct vattr va, dirfor, diraft; 2343 struct nfs_fattr *fp; 2344 struct nameidata nd; 2345 caddr_t cp; 2346 u_int32_t *tl; 2347 int32_t t1; 2348 caddr_t bpos; 2349 int error = 0, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 2350 int v3 = (nfsd->nd_flag & ND_NFSV3); 2351 char *cp2; 2352 struct mbuf *mb, *mreq; 2353 struct vnode *vp, *dirp = (struct vnode *)0; 2354 nfsfh_t nfh; 2355 fhandle_t *fhp; 2356 u_quad_t frev; 2357 struct mount *mp = NULL; 2358 2359 fhp = &nfh.fh_generic; 2360 nfsm_srvmtofh(fhp); 2361 if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) 2362 return (ESTALE); 2363 vn_start_write(NULL, &mp, V_WAIT); 2364 nfsm_srvnamesiz(len); 2365 nd.ni_cnd.cn_cred = cred; 2366 nd.ni_cnd.cn_nameiop = CREATE; 2367 nd.ni_cnd.cn_flags = LOCKPARENT; 2368 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 2369 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2370 if (dirp) { 2371 if (v3) 2372 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, lwp); 2373 else { 2374 vrele(dirp); 2375 dirp = (struct vnode *)0; 2376 } 2377 } 2378 if (error) { 2379 nfsm_reply(NFSX_WCCDATA(v3)); 2380 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2381 if (dirp) 2382 vrele(dirp); 2383 vn_finished_write(mp, 0); 2384 return (0); 2385 } 2386 VATTR_NULL(&va); 2387 if (v3) { 2388 va.va_mode = 0; 2389 nfsm_srvsattr(&va); 2390 } else { 2391 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2392 va.va_mode = nfstov_mode(*tl++); 2393 } 2394 va.va_type = VDIR; 2395 vp = nd.ni_vp; 2396 if (vp != NULL) { 2397 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2398 if (nd.ni_dvp == vp) 2399 vrele(nd.ni_dvp); 2400 else 2401 vput(nd.ni_dvp); 2402 vrele(vp); 2403 error = EEXIST; 2404 goto out; 2405 } 2406 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2407 error = VOP_MKDIR(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 2408 if (!error) { 2409 vp = nd.ni_vp; 2410 memset((caddr_t)fhp, 0, sizeof(nfh)); 2411 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsidx; 2412 error = VFS_VPTOFH(vp, &fhp->fh_fid); 2413 if (!error) 2414 error = VOP_GETATTR(vp, &va, cred, lwp); 2415 vput(vp); 2416 KASSERT(fhp->fh_fid.fid_len <= _VFS_MAXFIDSZ); 2417 } 2418 out: 2419 if (dirp) { 2420 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, lwp); 2421 vrele(dirp); 2422 } 2423 nfsm_reply(NFSX_SRVFH(v3) + NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2424 if (v3) { 2425 if (!error) { 2426 nfsm_srvpostop_fh(fhp); 2427 nfsm_srvpostop_attr(0, &va); 2428 } 2429 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2430 } else { 2431 nfsm_srvfhtom(fhp, v3); 2432 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 2433 nfsm_srvfillattr(&va, fp); 2434 } 2435 vn_finished_write(mp, 0); 2436 return (0); 2437 nfsmout: 2438 if (dirp) 2439 vrele(dirp); 2440 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2441 if (nd.ni_dvp == nd.ni_vp) 2442 vrele(nd.ni_dvp); 2443 else 2444 vput(nd.ni_dvp); 2445 if (nd.ni_vp) 2446 vrele(nd.ni_vp); 2447 vn_finished_write(mp, 0); 2448 return (error); 2449 } 2450 2451 /* 2452 * nfs rmdir service 2453 */ 2454 int 2455 nfsrv_rmdir(nfsd, slp, lwp, mrq) 2456 struct nfsrv_descript *nfsd; 2457 struct nfssvc_sock *slp; 2458 struct lwp *lwp; 2459 struct mbuf **mrq; 2460 { 2461 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2462 struct mbuf *nam = nfsd->nd_nam; 2463 caddr_t dpos = nfsd->nd_dpos; 2464 kauth_cred_t cred = nfsd->nd_cr; 2465 u_int32_t *tl; 2466 int32_t t1; 2467 caddr_t bpos; 2468 int error = 0, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 2469 int v3 = (nfsd->nd_flag & ND_NFSV3); 2470 char *cp2; 2471 struct mbuf *mb, *mreq; 2472 struct vnode *vp, *dirp = (struct vnode *)0; 2473 struct vattr dirfor, diraft; 2474 nfsfh_t nfh; 2475 fhandle_t *fhp; 2476 struct nameidata nd; 2477 u_quad_t frev; 2478 struct mount *mp = NULL; 2479 2480 fhp = &nfh.fh_generic; 2481 nfsm_srvmtofh(fhp); 2482 if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) 2483 return (ESTALE); 2484 vn_start_write(NULL, &mp, V_WAIT); 2485 nfsm_srvnamesiz(len); 2486 nd.ni_cnd.cn_cred = cred; 2487 nd.ni_cnd.cn_nameiop = DELETE; 2488 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 2489 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 2490 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2491 if (dirp) { 2492 if (v3) 2493 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, lwp); 2494 else { 2495 vrele(dirp); 2496 dirp = (struct vnode *)0; 2497 } 2498 } 2499 if (error) { 2500 nfsm_reply(NFSX_WCCDATA(v3)); 2501 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2502 if (dirp) 2503 vrele(dirp); 2504 vn_finished_write(mp, 0); 2505 return (0); 2506 } 2507 vp = nd.ni_vp; 2508 if (vp->v_type != VDIR) { 2509 error = ENOTDIR; 2510 goto out; 2511 } 2512 /* 2513 * No rmdir "." please. 2514 */ 2515 if (nd.ni_dvp == vp) { 2516 error = EINVAL; 2517 goto out; 2518 } 2519 /* 2520 * The root of a mounted filesystem cannot be deleted. 2521 */ 2522 if (vp->v_flag & VROOT) 2523 error = EBUSY; 2524 out: 2525 if (!error) { 2526 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2527 nqsrv_getl(vp, ND_WRITE); 2528 error = VOP_RMDIR(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); 2529 } else { 2530 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2531 if (nd.ni_dvp == nd.ni_vp) 2532 vrele(nd.ni_dvp); 2533 else 2534 vput(nd.ni_dvp); 2535 vput(vp); 2536 } 2537 if (dirp) { 2538 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, lwp); 2539 vrele(dirp); 2540 } 2541 nfsm_reply(NFSX_WCCDATA(v3)); 2542 if (v3) { 2543 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2544 vn_finished_write(mp, 0); 2545 return (0); 2546 } 2547 vn_finished_write(mp, 0); 2548 nfsm_srvdone; 2549 } 2550 2551 /* 2552 * nfs readdir service 2553 * - mallocs what it thinks is enough to read 2554 * count rounded up to a multiple of NFS_SRVDIRBLKSIZ <= NFS_MAXREADDIR 2555 * - calls VOP_READDIR() 2556 * - loops around building the reply 2557 * if the output generated exceeds count break out of loop 2558 * The nfsm_clget macro is used here so that the reply will be packed 2559 * tightly in mbuf clusters. 2560 * - it only knows that it has encountered eof when the VOP_READDIR() 2561 * reads nothing 2562 * - as such one readdir rpc will return eof false although you are there 2563 * and then the next will return eof 2564 * - it trims out records with d_fileno == 0 2565 * this doesn't matter for Unix clients, but they might confuse clients 2566 * for other os'. 2567 * - it trims out records with d_type == DT_WHT 2568 * these cannot be seen through NFS (unless we extend the protocol) 2569 * NB: It is tempting to set eof to true if the VOP_READDIR() reads less 2570 * than requested, but this may not apply to all filesystems. For 2571 * example, client NFS does not { although it is never remote mounted 2572 * anyhow } 2573 * The alternate call nfsrv_readdirplus() does lookups as well. 2574 * PS: The NFS protocol spec. does not clarify what the "count" byte 2575 * argument is a count of.. just name strings and file id's or the 2576 * entire reply rpc or ... 2577 * I tried just file name and id sizes and it confused the Sun client, 2578 * so I am using the full rpc size now. The "paranoia.." comment refers 2579 * to including the status longwords that are not a part of the dir. 2580 * "entry" structures, but are in the rpc. 2581 */ 2582 2583 #define NFS_SRVDIRBLKSIZ 1024 2584 2585 struct flrep { 2586 nfsuint64 fl_off; 2587 u_int32_t fl_postopok; 2588 u_int32_t fl_fattr[NFSX_V3FATTR / sizeof (u_int32_t)]; 2589 u_int32_t fl_fhok; 2590 u_int32_t fl_fhsize; 2591 u_int32_t fl_nfh[NFSX_V3FH / sizeof (u_int32_t)]; 2592 }; 2593 2594 int 2595 nfsrv_readdir(nfsd, slp, lwp, mrq) 2596 struct nfsrv_descript *nfsd; 2597 struct nfssvc_sock *slp; 2598 struct lwp *lwp; 2599 struct mbuf **mrq; 2600 { 2601 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2602 struct mbuf *nam = nfsd->nd_nam; 2603 caddr_t dpos = nfsd->nd_dpos; 2604 kauth_cred_t cred = nfsd->nd_cr; 2605 char *bp, *be; 2606 struct mbuf *mp; 2607 struct dirent *dp; 2608 caddr_t cp; 2609 u_int32_t *tl; 2610 int32_t t1; 2611 caddr_t bpos; 2612 struct mbuf *mb, *mreq, *mp2; 2613 char *cpos, *cend, *cp2, *rbuf; 2614 struct vnode *vp; 2615 struct vattr at; 2616 nfsfh_t nfh; 2617 fhandle_t *fhp; 2618 struct uio io; 2619 struct iovec iv; 2620 int len, nlen, rem, xfer, tsiz, i, error = 0, getret = 1; 2621 int siz, cnt, fullsiz, eofflag, rdonly, cache = 0, ncookies; 2622 int v3 = (nfsd->nd_flag & ND_NFSV3); 2623 u_quad_t frev, off, toff, verf; 2624 off_t *cookies = NULL, *cookiep; 2625 nfsuint64 jar; 2626 2627 fhp = &nfh.fh_generic; 2628 nfsm_srvmtofh(fhp); 2629 if (v3) { 2630 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 2631 toff = fxdr_hyper(tl); 2632 tl += 2; 2633 verf = fxdr_hyper(tl); 2634 tl += 2; 2635 } else { 2636 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2637 toff = fxdr_unsigned(u_quad_t, *tl++); 2638 } 2639 off = toff; 2640 cnt = fxdr_unsigned(int, *tl); 2641 siz = ((cnt + NFS_SRVDIRBLKSIZ - 1) & ~(NFS_SRVDIRBLKSIZ - 1)); 2642 xfer = NFS_SRVMAXDATA(nfsd); 2643 if (siz > xfer) 2644 siz = xfer; 2645 fullsiz = siz; 2646 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 2647 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2648 if (!error && vp->v_type != VDIR) { 2649 error = ENOTDIR; 2650 vput(vp); 2651 } 2652 if (error) { 2653 nfsm_reply(NFSX_UNSIGNED); 2654 nfsm_srvpostop_attr(getret, &at); 2655 return (0); 2656 } 2657 nqsrv_getl(vp, ND_READ); 2658 if (v3) { 2659 error = getret = VOP_GETATTR(vp, &at, cred, lwp); 2660 #ifdef NFS3_STRICTVERF 2661 /* 2662 * XXX This check is too strict for Solaris 2.5 clients. 2663 */ 2664 if (!error && toff && verf != at.va_filerev) 2665 error = NFSERR_BAD_COOKIE; 2666 #endif 2667 } 2668 if (!error) 2669 error = nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 0); 2670 if (error) { 2671 vput(vp); 2672 nfsm_reply(NFSX_POSTOPATTR(v3)); 2673 nfsm_srvpostop_attr(getret, &at); 2674 return (0); 2675 } 2676 VOP_UNLOCK(vp, 0); 2677 rbuf = malloc(siz, M_TEMP, M_WAITOK); 2678 again: 2679 iv.iov_base = rbuf; 2680 iv.iov_len = fullsiz; 2681 io.uio_iov = &iv; 2682 io.uio_iovcnt = 1; 2683 io.uio_offset = (off_t)off; 2684 io.uio_resid = fullsiz; 2685 io.uio_rw = UIO_READ; 2686 UIO_SETUP_SYSSPACE(&io); 2687 eofflag = 0; 2688 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2689 2690 error = VOP_READDIR(vp, &io, cred, &eofflag, &cookies, &ncookies); 2691 2692 off = (off_t)io.uio_offset; 2693 if (!cookies && !error) 2694 error = NFSERR_PERM; 2695 if (v3) { 2696 getret = VOP_GETATTR(vp, &at, cred, lwp); 2697 if (!error) 2698 error = getret; 2699 } 2700 2701 VOP_UNLOCK(vp, 0); 2702 if (error) { 2703 vrele(vp); 2704 free((caddr_t)rbuf, M_TEMP); 2705 if (cookies) 2706 free((caddr_t)cookies, M_TEMP); 2707 nfsm_reply(NFSX_POSTOPATTR(v3)); 2708 nfsm_srvpostop_attr(getret, &at); 2709 return (0); 2710 } 2711 if (io.uio_resid) { 2712 siz -= io.uio_resid; 2713 2714 /* 2715 * If nothing read, return eof 2716 * rpc reply 2717 */ 2718 if (siz == 0) { 2719 vrele(vp); 2720 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_COOKIEVERF(v3) + 2721 2 * NFSX_UNSIGNED); 2722 if (v3) { 2723 nfsm_srvpostop_attr(getret, &at); 2724 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 2725 txdr_hyper(at.va_filerev, tl); 2726 tl += 2; 2727 } else 2728 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2729 *tl++ = nfs_false; 2730 *tl = nfs_true; 2731 free((caddr_t)rbuf, M_TEMP); 2732 free((caddr_t)cookies, M_TEMP); 2733 return (0); 2734 } 2735 } 2736 2737 /* 2738 * Check for degenerate cases of nothing useful read. 2739 * If so go try again 2740 */ 2741 cpos = rbuf; 2742 cend = rbuf + siz; 2743 dp = (struct dirent *)cpos; 2744 cookiep = cookies; 2745 2746 while (cpos < cend && ncookies > 0 && 2747 (dp->d_fileno == 0 || dp->d_type == DT_WHT)) { 2748 cpos += dp->d_reclen; 2749 dp = (struct dirent *)cpos; 2750 cookiep++; 2751 ncookies--; 2752 } 2753 if (cpos >= cend || ncookies == 0) { 2754 toff = off; 2755 siz = fullsiz; 2756 goto again; 2757 } 2758 2759 len = 3 * NFSX_UNSIGNED; /* paranoia, probably can be 0 */ 2760 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_COOKIEVERF(v3) + siz); 2761 if (v3) { 2762 nfsm_srvpostop_attr(getret, &at); 2763 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2764 txdr_hyper(at.va_filerev, tl); 2765 } 2766 mp = mp2 = mb; 2767 bp = bpos; 2768 be = bp + M_TRAILINGSPACE(mp); 2769 2770 /* Loop through the records and build reply */ 2771 while (cpos < cend && ncookies > 0) { 2772 if (dp->d_fileno != 0 && dp->d_type != DT_WHT) { 2773 nlen = dp->d_namlen; 2774 rem = nfsm_rndup(nlen)-nlen; 2775 len += (4 * NFSX_UNSIGNED + nlen + rem); 2776 if (v3) 2777 len += 2 * NFSX_UNSIGNED; 2778 if (len > cnt) { 2779 eofflag = 0; 2780 break; 2781 } 2782 /* 2783 * Build the directory record xdr from 2784 * the dirent entry. 2785 */ 2786 nfsm_clget; 2787 *tl = nfs_true; 2788 bp += NFSX_UNSIGNED; 2789 if (v3) { 2790 nfsm_clget; 2791 *tl = txdr_unsigned(dp->d_fileno >> 32); 2792 bp += NFSX_UNSIGNED; 2793 } 2794 nfsm_clget; 2795 *tl = txdr_unsigned(dp->d_fileno); 2796 bp += NFSX_UNSIGNED; 2797 nfsm_clget; 2798 *tl = txdr_unsigned(nlen); 2799 bp += NFSX_UNSIGNED; 2800 2801 /* And loop around copying the name */ 2802 xfer = nlen; 2803 cp = dp->d_name; 2804 while (xfer > 0) { 2805 nfsm_clget; 2806 if ((bp+xfer) > be) 2807 tsiz = be-bp; 2808 else 2809 tsiz = xfer; 2810 memcpy(bp, cp, tsiz); 2811 bp += tsiz; 2812 xfer -= tsiz; 2813 if (xfer > 0) 2814 cp += tsiz; 2815 } 2816 /* And null pad to an int32_t boundary */ 2817 for (i = 0; i < rem; i++) 2818 *bp++ = '\0'; 2819 nfsm_clget; 2820 2821 /* Finish off the record */ 2822 txdr_hyper(*cookiep, &jar); 2823 if (v3) { 2824 *tl = jar.nfsuquad[0]; 2825 bp += NFSX_UNSIGNED; 2826 nfsm_clget; 2827 } 2828 *tl = jar.nfsuquad[1]; 2829 bp += NFSX_UNSIGNED; 2830 } 2831 cpos += dp->d_reclen; 2832 dp = (struct dirent *)cpos; 2833 cookiep++; 2834 ncookies--; 2835 } 2836 vrele(vp); 2837 nfsm_clget; 2838 *tl = nfs_false; 2839 bp += NFSX_UNSIGNED; 2840 nfsm_clget; 2841 if (eofflag) 2842 *tl = nfs_true; 2843 else 2844 *tl = nfs_false; 2845 bp += NFSX_UNSIGNED; 2846 if (mp != mb) { 2847 if (bp < be) 2848 mp->m_len = bp - mtod(mp, caddr_t); 2849 } else 2850 mp->m_len += bp - bpos; 2851 free((caddr_t)rbuf, M_TEMP); 2852 free((caddr_t)cookies, M_TEMP); 2853 nfsm_srvdone; 2854 } 2855 2856 int 2857 nfsrv_readdirplus(nfsd, slp, lwp, mrq) 2858 struct nfsrv_descript *nfsd; 2859 struct nfssvc_sock *slp; 2860 struct lwp *lwp; 2861 struct mbuf **mrq; 2862 { 2863 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2864 struct mbuf *nam = nfsd->nd_nam; 2865 caddr_t dpos = nfsd->nd_dpos; 2866 kauth_cred_t cred = nfsd->nd_cr; 2867 char *bp, *be; 2868 struct mbuf *mp; 2869 struct dirent *dp; 2870 caddr_t cp; 2871 u_int32_t *tl; 2872 int32_t t1; 2873 caddr_t bpos; 2874 struct mbuf *mb, *mreq, *mp2; 2875 char *cpos, *cend, *cp2, *rbuf; 2876 struct vnode *vp, *nvp; 2877 struct flrep fl; 2878 nfsfh_t nfh; 2879 fhandle_t *fhp, *nfhp = (fhandle_t *)fl.fl_nfh; 2880 struct uio io; 2881 struct iovec iv; 2882 struct vattr va, at, *vap = &va; 2883 struct nfs_fattr *fp; 2884 int len, nlen, rem, xfer, tsiz, i, error = 0, getret = 1; 2885 int siz, cnt, fullsiz, eofflag, rdonly, cache = 0, dirlen, ncookies; 2886 u_quad_t frev, off, toff, verf; 2887 off_t *cookies = NULL, *cookiep; 2888 2889 fhp = &nfh.fh_generic; 2890 nfsm_srvmtofh(fhp); 2891 nfsm_dissect(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 2892 toff = fxdr_hyper(tl); 2893 tl += 2; 2894 verf = fxdr_hyper(tl); 2895 tl += 2; 2896 siz = fxdr_unsigned(int, *tl++); 2897 cnt = fxdr_unsigned(int, *tl); 2898 off = toff; 2899 siz = ((siz + NFS_SRVDIRBLKSIZ - 1) & ~(NFS_SRVDIRBLKSIZ - 1)); 2900 xfer = NFS_SRVMAXDATA(nfsd); 2901 if (siz > xfer) 2902 siz = xfer; 2903 fullsiz = siz; 2904 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 2905 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2906 if (!error && vp->v_type != VDIR) { 2907 error = ENOTDIR; 2908 vput(vp); 2909 } 2910 if (error) { 2911 nfsm_reply(NFSX_UNSIGNED); 2912 nfsm_srvpostop_attr(getret, &at); 2913 return (0); 2914 } 2915 error = getret = VOP_GETATTR(vp, &at, cred, lwp); 2916 #ifdef NFS3_STRICTVERF 2917 /* 2918 * XXX This check is too strict for Solaris 2.5 clients. 2919 */ 2920 if (!error && toff && verf != at.va_filerev) 2921 error = NFSERR_BAD_COOKIE; 2922 #endif 2923 if (!error) { 2924 nqsrv_getl(vp, ND_READ); 2925 error = nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 0); 2926 } 2927 if (error) { 2928 vput(vp); 2929 nfsm_reply(NFSX_V3POSTOPATTR); 2930 nfsm_srvpostop_attr(getret, &at); 2931 return (0); 2932 } 2933 VOP_UNLOCK(vp, 0); 2934 2935 rbuf = malloc(siz, M_TEMP, M_WAITOK); 2936 again: 2937 iv.iov_base = rbuf; 2938 iv.iov_len = fullsiz; 2939 io.uio_iov = &iv; 2940 io.uio_iovcnt = 1; 2941 io.uio_offset = (off_t)off; 2942 io.uio_resid = fullsiz; 2943 io.uio_rw = UIO_READ; 2944 UIO_SETUP_SYSSPACE(&io); 2945 eofflag = 0; 2946 2947 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2948 2949 error = VOP_READDIR(vp, &io, cred, &eofflag, &cookies, &ncookies); 2950 2951 off = (u_quad_t)io.uio_offset; 2952 getret = VOP_GETATTR(vp, &at, cred, lwp); 2953 2954 VOP_UNLOCK(vp, 0); 2955 2956 /* 2957 * If the VGET operation doesn't work for this filesystem, 2958 * we can't support readdirplus. Returning NOTSUPP should 2959 * make clients fall back to plain readdir. 2960 * There's no need to check for VPTOFH as well, we wouldn't 2961 * even be here otherwise. 2962 */ 2963 if (!getret) { 2964 if ((getret = VFS_VGET(vp->v_mount, at.va_fileid, &nvp))) 2965 getret = (getret == EOPNOTSUPP) ? 2966 NFSERR_NOTSUPP : NFSERR_IO; 2967 else 2968 vput(nvp); 2969 } 2970 2971 if (!cookies && !error) 2972 error = NFSERR_PERM; 2973 if (!error) 2974 error = getret; 2975 if (error) { 2976 vrele(vp); 2977 if (cookies) 2978 free((caddr_t)cookies, M_TEMP); 2979 free((caddr_t)rbuf, M_TEMP); 2980 nfsm_reply(NFSX_V3POSTOPATTR); 2981 nfsm_srvpostop_attr(getret, &at); 2982 return (0); 2983 } 2984 if (io.uio_resid) { 2985 siz -= io.uio_resid; 2986 2987 /* 2988 * If nothing read, return eof 2989 * rpc reply 2990 */ 2991 if (siz == 0) { 2992 vrele(vp); 2993 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF + 2994 2 * NFSX_UNSIGNED); 2995 nfsm_srvpostop_attr(getret, &at); 2996 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 2997 txdr_hyper(at.va_filerev, tl); 2998 tl += 2; 2999 *tl++ = nfs_false; 3000 *tl = nfs_true; 3001 free((caddr_t)cookies, M_TEMP); 3002 free((caddr_t)rbuf, M_TEMP); 3003 return (0); 3004 } 3005 } 3006 3007 /* 3008 * Check for degenerate cases of nothing useful read. 3009 * If so go try again 3010 */ 3011 cpos = rbuf; 3012 cend = rbuf + siz; 3013 dp = (struct dirent *)cpos; 3014 cookiep = cookies; 3015 3016 while (cpos < cend && ncookies > 0 && 3017 (dp->d_fileno == 0 || dp->d_type == DT_WHT)) { 3018 cpos += dp->d_reclen; 3019 dp = (struct dirent *)cpos; 3020 cookiep++; 3021 ncookies--; 3022 } 3023 if (cpos >= cend || ncookies == 0) { 3024 toff = off; 3025 siz = fullsiz; 3026 goto again; 3027 } 3028 3029 dirlen = len = NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF + 2 * NFSX_UNSIGNED; 3030 nfsm_reply(cnt); 3031 nfsm_srvpostop_attr(getret, &at); 3032 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 3033 txdr_hyper(at.va_filerev, tl); 3034 mp = mp2 = mb; 3035 bp = bpos; 3036 be = bp + M_TRAILINGSPACE(mp); 3037 3038 /* Loop through the records and build reply */ 3039 while (cpos < cend && ncookies > 0) { 3040 if (dp->d_fileno != 0 && dp->d_type != DT_WHT) { 3041 nlen = dp->d_namlen; 3042 rem = nfsm_rndup(nlen)-nlen; 3043 3044 /* 3045 * For readdir_and_lookup get the vnode using 3046 * the file number. 3047 */ 3048 if (VFS_VGET(vp->v_mount, dp->d_fileno, &nvp)) 3049 goto invalid; 3050 memset((caddr_t)nfhp, 0, NFSX_V3FH); 3051 nfhp->fh_fsid = 3052 nvp->v_mount->mnt_stat.f_fsidx; 3053 if (VFS_VPTOFH(nvp, &nfhp->fh_fid)) { 3054 vput(nvp); 3055 goto invalid; 3056 } 3057 if (VOP_GETATTR(nvp, vap, cred, lwp)) { 3058 vput(nvp); 3059 goto invalid; 3060 } 3061 vput(nvp); 3062 KASSERT(fhp->fh_fid.fid_len <= _VFS_MAXFIDSZ); 3063 3064 /* 3065 * If either the dircount or maxcount will be 3066 * exceeded, get out now. Both of these lengths 3067 * are calculated conservatively, including all 3068 * XDR overheads. 3069 */ 3070 len += (8 * NFSX_UNSIGNED + nlen + rem + NFSX_V3FH + 3071 NFSX_V3POSTOPATTR); 3072 dirlen += (6 * NFSX_UNSIGNED + nlen + rem); 3073 if (len > cnt || dirlen > fullsiz) { 3074 eofflag = 0; 3075 break; 3076 } 3077 3078 /* 3079 * Build the directory record xdr from 3080 * the dirent entry. 3081 */ 3082 fp = (struct nfs_fattr *)&fl.fl_fattr; 3083 nfsm_srvfillattr(vap, fp); 3084 fl.fl_fhsize = txdr_unsigned(NFSX_V3FH); 3085 fl.fl_fhok = nfs_true; 3086 fl.fl_postopok = nfs_true; 3087 txdr_hyper(*cookiep, fl.fl_off.nfsuquad); 3088 3089 nfsm_clget; 3090 *tl = nfs_true; 3091 bp += NFSX_UNSIGNED; 3092 nfsm_clget; 3093 *tl = txdr_unsigned(dp->d_fileno >> 32); 3094 bp += NFSX_UNSIGNED; 3095 nfsm_clget; 3096 *tl = txdr_unsigned(dp->d_fileno); 3097 bp += NFSX_UNSIGNED; 3098 nfsm_clget; 3099 *tl = txdr_unsigned(nlen); 3100 bp += NFSX_UNSIGNED; 3101 3102 /* And loop around copying the name */ 3103 xfer = nlen; 3104 cp = dp->d_name; 3105 while (xfer > 0) { 3106 nfsm_clget; 3107 if ((bp + xfer) > be) 3108 tsiz = be - bp; 3109 else 3110 tsiz = xfer; 3111 memcpy(bp, cp, tsiz); 3112 bp += tsiz; 3113 xfer -= tsiz; 3114 if (xfer > 0) 3115 cp += tsiz; 3116 } 3117 /* And null pad to an int32_t boundary */ 3118 for (i = 0; i < rem; i++) 3119 *bp++ = '\0'; 3120 3121 /* 3122 * Now copy the flrep structure out. 3123 */ 3124 xfer = sizeof (struct flrep); 3125 cp = (caddr_t)&fl; 3126 while (xfer > 0) { 3127 nfsm_clget; 3128 if ((bp + xfer) > be) 3129 tsiz = be - bp; 3130 else 3131 tsiz = xfer; 3132 memcpy(bp, cp, tsiz); 3133 bp += tsiz; 3134 xfer -= tsiz; 3135 if (xfer > 0) 3136 cp += tsiz; 3137 } 3138 } 3139 invalid: 3140 cpos += dp->d_reclen; 3141 dp = (struct dirent *)cpos; 3142 cookiep++; 3143 ncookies--; 3144 } 3145 vrele(vp); 3146 nfsm_clget; 3147 *tl = nfs_false; 3148 bp += NFSX_UNSIGNED; 3149 nfsm_clget; 3150 if (eofflag) 3151 *tl = nfs_true; 3152 else 3153 *tl = nfs_false; 3154 bp += NFSX_UNSIGNED; 3155 if (mp != mb) { 3156 if (bp < be) 3157 mp->m_len = bp - mtod(mp, caddr_t); 3158 } else 3159 mp->m_len += bp - bpos; 3160 free((caddr_t)cookies, M_TEMP); 3161 free((caddr_t)rbuf, M_TEMP); 3162 nfsm_srvdone; 3163 } 3164 3165 /* 3166 * nfs commit service 3167 */ 3168 int 3169 nfsrv_commit(nfsd, slp, lwp, mrq) 3170 struct nfsrv_descript *nfsd; 3171 struct nfssvc_sock *slp; 3172 struct lwp *lwp; 3173 struct mbuf **mrq; 3174 { 3175 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3176 struct mbuf *nam = nfsd->nd_nam; 3177 caddr_t dpos = nfsd->nd_dpos; 3178 kauth_cred_t cred = nfsd->nd_cr; 3179 struct vattr bfor, aft; 3180 struct vnode *vp; 3181 nfsfh_t nfh; 3182 fhandle_t *fhp; 3183 u_int32_t *tl; 3184 int32_t t1; 3185 caddr_t bpos; 3186 int error = 0, rdonly, for_ret = 1, aft_ret = 1, cache = 0; 3187 uint32_t cnt; 3188 char *cp2; 3189 struct mbuf *mb, *mreq; 3190 u_quad_t frev, off, end; 3191 struct mount *mp = NULL; 3192 3193 fhp = &nfh.fh_generic; 3194 nfsm_srvmtofh(fhp); 3195 if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) 3196 return (ESTALE); 3197 vn_start_write(NULL, &mp, V_WAIT); 3198 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 3199 3200 off = fxdr_hyper(tl); 3201 tl += 2; 3202 cnt = fxdr_unsigned(uint32_t, *tl); 3203 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 3204 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 3205 if (error) { 3206 nfsm_reply(2 * NFSX_UNSIGNED); 3207 nfsm_srvwcc_data(for_ret, &bfor, aft_ret, &aft); 3208 vn_finished_write(mp, 0); 3209 return (0); 3210 } 3211 for_ret = VOP_GETATTR(vp, &bfor, cred, lwp); 3212 end = (cnt > 0) ? off + cnt : vp->v_size; 3213 if (end < off || end > vp->v_size) 3214 end = vp->v_size; 3215 if (off < vp->v_size) 3216 error = VOP_FSYNC(vp, cred, FSYNC_WAIT, off, end, lwp); 3217 /* else error == 0, from nfsrv_fhtovp() */ 3218 aft_ret = VOP_GETATTR(vp, &aft, cred, lwp); 3219 vput(vp); 3220 nfsm_reply(NFSX_V3WCCDATA + NFSX_V3WRITEVERF); 3221 nfsm_srvwcc_data(for_ret, &bfor, aft_ret, &aft); 3222 if (!error) { 3223 nfsm_build(tl, u_int32_t *, NFSX_V3WRITEVERF); 3224 *tl++ = txdr_unsigned(boottime.tv_sec); 3225 *tl = txdr_unsigned(boottime.tv_usec); 3226 } else { 3227 vn_finished_write(mp, 0); 3228 return (0); 3229 } 3230 vn_finished_write(mp, 0); 3231 nfsm_srvdone; 3232 } 3233 3234 /* 3235 * nfs statfs service 3236 */ 3237 int 3238 nfsrv_statfs(nfsd, slp, lwp, mrq) 3239 struct nfsrv_descript *nfsd; 3240 struct nfssvc_sock *slp; 3241 struct lwp *lwp; 3242 struct mbuf **mrq; 3243 { 3244 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3245 struct mbuf *nam = nfsd->nd_nam; 3246 caddr_t dpos = nfsd->nd_dpos; 3247 kauth_cred_t cred = nfsd->nd_cr; 3248 struct statvfs *sf; 3249 struct nfs_statfs *sfp; 3250 u_int32_t *tl; 3251 int32_t t1; 3252 caddr_t bpos; 3253 int error = 0, rdonly, cache = 0, getret = 1; 3254 int v3 = (nfsd->nd_flag & ND_NFSV3); 3255 char *cp2; 3256 struct mbuf *mb, *mreq; 3257 struct vnode *vp; 3258 struct vattr at; 3259 nfsfh_t nfh; 3260 fhandle_t *fhp; 3261 struct statvfs statvfs; 3262 u_quad_t frev, tval; 3263 3264 fhp = &nfh.fh_generic; 3265 nfsm_srvmtofh(fhp); 3266 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 3267 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 3268 if (error) { 3269 nfsm_reply(NFSX_UNSIGNED); 3270 nfsm_srvpostop_attr(getret, &at); 3271 return (0); 3272 } 3273 sf = &statvfs; 3274 error = VFS_STATVFS(vp->v_mount, sf, lwp); 3275 getret = VOP_GETATTR(vp, &at, cred, lwp); 3276 vput(vp); 3277 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_STATFS(v3)); 3278 if (v3) 3279 nfsm_srvpostop_attr(getret, &at); 3280 if (error) 3281 return (0); 3282 nfsm_build(sfp, struct nfs_statfs *, NFSX_STATFS(v3)); 3283 if (v3) { 3284 tval = (u_quad_t)((quad_t)sf->f_blocks * (quad_t)sf->f_frsize); 3285 txdr_hyper(tval, &sfp->sf_tbytes); 3286 tval = (u_quad_t)((quad_t)sf->f_bfree * (quad_t)sf->f_frsize); 3287 txdr_hyper(tval, &sfp->sf_fbytes); 3288 tval = (u_quad_t)((quad_t)sf->f_bavail * (quad_t)sf->f_frsize); 3289 txdr_hyper(tval, &sfp->sf_abytes); 3290 tval = (u_quad_t)sf->f_files; 3291 txdr_hyper(tval, &sfp->sf_tfiles); 3292 tval = (u_quad_t)sf->f_ffree; 3293 txdr_hyper(tval, &sfp->sf_ffiles); 3294 txdr_hyper(tval, &sfp->sf_afiles); 3295 sfp->sf_invarsec = 0; 3296 } else { 3297 sfp->sf_tsize = txdr_unsigned(NFS_MAXDGRAMDATA); 3298 sfp->sf_bsize = txdr_unsigned(sf->f_frsize); 3299 sfp->sf_blocks = txdr_unsigned(sf->f_blocks); 3300 sfp->sf_bfree = txdr_unsigned(sf->f_bfree); 3301 sfp->sf_bavail = txdr_unsigned(sf->f_bavail); 3302 } 3303 nfsm_srvdone; 3304 } 3305 3306 /* 3307 * nfs fsinfo service 3308 */ 3309 int 3310 nfsrv_fsinfo(nfsd, slp, lwp, mrq) 3311 struct nfsrv_descript *nfsd; 3312 struct nfssvc_sock *slp; 3313 struct lwp *lwp; 3314 struct mbuf **mrq; 3315 { 3316 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3317 struct mbuf *nam = nfsd->nd_nam; 3318 caddr_t dpos = nfsd->nd_dpos; 3319 kauth_cred_t cred = nfsd->nd_cr; 3320 u_int32_t *tl; 3321 struct nfsv3_fsinfo *sip; 3322 int32_t t1; 3323 caddr_t bpos; 3324 int error = 0, rdonly, cache = 0, getret = 1; 3325 uint32_t maxdata; 3326 char *cp2; 3327 struct mbuf *mb, *mreq; 3328 struct vnode *vp; 3329 struct vattr at; 3330 nfsfh_t nfh; 3331 fhandle_t *fhp; 3332 u_quad_t frev, maxfsize; 3333 struct statvfs sb; 3334 3335 fhp = &nfh.fh_generic; 3336 nfsm_srvmtofh(fhp); 3337 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 3338 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 3339 if (error) { 3340 nfsm_reply(NFSX_UNSIGNED); 3341 nfsm_srvpostop_attr(getret, &at); 3342 return (0); 3343 } 3344 3345 /* XXX Try to make a guess on the max file size. */ 3346 VFS_STATVFS(vp->v_mount, &sb, (struct lwp *)0); 3347 maxfsize = (u_quad_t)0x80000000 * sb.f_frsize - 1; 3348 3349 getret = VOP_GETATTR(vp, &at, cred, lwp); 3350 vput(vp); 3351 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3FSINFO); 3352 nfsm_srvpostop_attr(getret, &at); 3353 nfsm_build(sip, struct nfsv3_fsinfo *, NFSX_V3FSINFO); 3354 3355 /* 3356 * XXX 3357 * There should be file system VFS OP(s) to get this information. 3358 * For now, assume ufs. 3359 */ 3360 if (slp->ns_so->so_type == SOCK_DGRAM) 3361 maxdata = NFS_MAXDGRAMDATA; 3362 else 3363 maxdata = NFS_MAXDATA; 3364 sip->fs_rtmax = txdr_unsigned(maxdata); 3365 sip->fs_rtpref = txdr_unsigned(maxdata); 3366 sip->fs_rtmult = txdr_unsigned(NFS_FABLKSIZE); 3367 sip->fs_wtmax = txdr_unsigned(maxdata); 3368 sip->fs_wtpref = txdr_unsigned(maxdata); 3369 sip->fs_wtmult = txdr_unsigned(NFS_FABLKSIZE); 3370 sip->fs_dtpref = txdr_unsigned(maxdata); 3371 txdr_hyper(maxfsize, &sip->fs_maxfilesize); 3372 sip->fs_timedelta.nfsv3_sec = 0; 3373 sip->fs_timedelta.nfsv3_nsec = txdr_unsigned(1); 3374 sip->fs_properties = txdr_unsigned(NFSV3FSINFO_LINK | 3375 NFSV3FSINFO_SYMLINK | NFSV3FSINFO_HOMOGENEOUS | 3376 NFSV3FSINFO_CANSETTIME); 3377 nfsm_srvdone; 3378 } 3379 3380 /* 3381 * nfs pathconf service 3382 */ 3383 int 3384 nfsrv_pathconf(nfsd, slp, lwp, mrq) 3385 struct nfsrv_descript *nfsd; 3386 struct nfssvc_sock *slp; 3387 struct lwp *lwp; 3388 struct mbuf **mrq; 3389 { 3390 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3391 struct mbuf *nam = nfsd->nd_nam; 3392 caddr_t dpos = nfsd->nd_dpos; 3393 kauth_cred_t cred = nfsd->nd_cr; 3394 u_int32_t *tl; 3395 struct nfsv3_pathconf *pc; 3396 int32_t t1; 3397 caddr_t bpos; 3398 int error = 0, rdonly, cache = 0, getret = 1; 3399 register_t linkmax, namemax, chownres, notrunc; 3400 char *cp2; 3401 struct mbuf *mb, *mreq; 3402 struct vnode *vp; 3403 struct vattr at; 3404 nfsfh_t nfh; 3405 fhandle_t *fhp; 3406 u_quad_t frev; 3407 3408 fhp = &nfh.fh_generic; 3409 nfsm_srvmtofh(fhp); 3410 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 3411 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 3412 if (error) { 3413 nfsm_reply(NFSX_UNSIGNED); 3414 nfsm_srvpostop_attr(getret, &at); 3415 return (0); 3416 } 3417 error = VOP_PATHCONF(vp, _PC_LINK_MAX, &linkmax); 3418 if (!error) 3419 error = VOP_PATHCONF(vp, _PC_NAME_MAX, &namemax); 3420 if (!error) 3421 error = VOP_PATHCONF(vp, _PC_CHOWN_RESTRICTED, &chownres); 3422 if (!error) 3423 error = VOP_PATHCONF(vp, _PC_NO_TRUNC, ¬runc); 3424 getret = VOP_GETATTR(vp, &at, cred, lwp); 3425 vput(vp); 3426 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3PATHCONF); 3427 nfsm_srvpostop_attr(getret, &at); 3428 if (error) 3429 return (0); 3430 nfsm_build(pc, struct nfsv3_pathconf *, NFSX_V3PATHCONF); 3431 3432 pc->pc_linkmax = txdr_unsigned(linkmax); 3433 pc->pc_namemax = txdr_unsigned(namemax); 3434 pc->pc_notrunc = txdr_unsigned(notrunc); 3435 pc->pc_chownrestricted = txdr_unsigned(chownres); 3436 3437 /* 3438 * These should probably be supported by VOP_PATHCONF(), but 3439 * until msdosfs is exportable (why would you want to?), the 3440 * Unix defaults should be ok. 3441 */ 3442 pc->pc_caseinsensitive = nfs_false; 3443 pc->pc_casepreserving = nfs_true; 3444 nfsm_srvdone; 3445 } 3446 3447 /* 3448 * Null operation, used by clients to ping server 3449 */ 3450 /* ARGSUSED */ 3451 int 3452 nfsrv_null(nfsd, slp, lwp, mrq) 3453 struct nfsrv_descript *nfsd; 3454 struct nfssvc_sock *slp; 3455 struct lwp *lwp; 3456 struct mbuf **mrq; 3457 { 3458 struct mbuf *mrep = nfsd->nd_mrep; 3459 caddr_t bpos; 3460 int error = NFSERR_RETVOID, cache = 0; 3461 struct mbuf *mb, *mreq; 3462 u_quad_t frev; 3463 3464 nfsm_reply(0); 3465 return (0); 3466 } 3467 3468 /* 3469 * No operation, used for obsolete procedures 3470 */ 3471 /* ARGSUSED */ 3472 int 3473 nfsrv_noop(nfsd, slp, lwp, mrq) 3474 struct nfsrv_descript *nfsd; 3475 struct nfssvc_sock *slp; 3476 struct lwp *lwp; 3477 struct mbuf **mrq; 3478 { 3479 struct mbuf *mrep = nfsd->nd_mrep; 3480 caddr_t bpos; 3481 int error, cache = 0; 3482 struct mbuf *mb, *mreq; 3483 u_quad_t frev; 3484 3485 if (nfsd->nd_repstat) 3486 error = nfsd->nd_repstat; 3487 else 3488 error = EPROCUNAVAIL; 3489 nfsm_reply(0); 3490 return (0); 3491 } 3492 3493 /* 3494 * Perform access checking for vnodes obtained from file handles that would 3495 * refer to files already opened by a Unix client. You cannot just use 3496 * vn_writechk() and VOP_ACCESS() for two reasons. 3497 * 1 - You must check for exported rdonly as well as MNT_RDONLY for the write case 3498 * 2 - The owner is to be given access irrespective of mode bits for some 3499 * operations, so that processes that chmod after opening a file don't 3500 * break. I don't like this because it opens a security hole, but since 3501 * the nfs server opens a security hole the size of a barn door anyhow, 3502 * what the heck. 3503 * 3504 * The exception to rule 2 is EPERM. If a file is IMMUTABLE, VOP_ACCESS() 3505 * will return EPERM instead of EACCESS. EPERM is always an error. 3506 */ 3507 int 3508 nfsrv_access(vp, flags, cred, rdonly, lwp, override) 3509 struct vnode *vp; 3510 int flags; 3511 kauth_cred_t cred; 3512 int rdonly; 3513 struct lwp *lwp; 3514 { 3515 struct vattr vattr; 3516 int error; 3517 if (flags & VWRITE) { 3518 /* Just vn_writechk() changed to check rdonly */ 3519 /* 3520 * Disallow write attempts on read-only file systems; 3521 * unless the file is a socket or a block or character 3522 * device resident on the file system. 3523 */ 3524 if (rdonly || (vp->v_mount->mnt_flag & MNT_RDONLY)) { 3525 switch (vp->v_type) { 3526 case VREG: 3527 case VDIR: 3528 case VLNK: 3529 return (EROFS); 3530 default: 3531 break; 3532 } 3533 } 3534 3535 /* 3536 * If the vnode is in use as a process's text, 3537 * we can't allow writing. 3538 */ 3539 if (vp->v_flag & VTEXT) 3540 return (ETXTBSY); 3541 } 3542 error = VOP_GETATTR(vp, &vattr, cred, lwp); 3543 if (error) 3544 return (error); 3545 error = VOP_ACCESS(vp, flags, cred, lwp); 3546 /* 3547 * Allow certain operations for the owner (reads and writes 3548 * on files that are already open). 3549 */ 3550 if (override && error == EACCES && kauth_cred_geteuid(cred) == vattr.va_uid) 3551 error = 0; 3552 return error; 3553 } 3554
Indexes created Thu Oct 02 14:10:14 GMT 2025