nfs_serv.c revision 1.101.4.3
1 /* $NetBSD: nfs_serv.c,v 1.101.4.3 2006/03/12 00:07:42 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 1.101.4.3 2006/03/12 00:07:42 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; 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, 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, 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 nfsm_reply(NFSX_SRVFH(v3) + NFSX_POSTOPORFATTR(v3) + NFSX_POSTOPATTR(v3)); 453 if (error) { 454 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 455 return (0); 456 } 457 nfsm_srvfhtom(fhp, v3); 458 if (v3) { 459 nfsm_srvpostop_attr(0, &va); 460 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 461 } else { 462 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 463 nfsm_srvfillattr(&va, fp); 464 } 465 nfsm_srvdone; 466 } 467 468 /* 469 * nfs readlink service 470 */ 471 int 472 nfsrv_readlink(nfsd, slp, lwp, mrq) 473 struct nfsrv_descript *nfsd; 474 struct nfssvc_sock *slp; 475 struct lwp *lwp; 476 struct mbuf **mrq; 477 { 478 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 479 struct mbuf *nam = nfsd->nd_nam; 480 caddr_t dpos = nfsd->nd_dpos; 481 kauth_cred_t cred = nfsd->nd_cr; 482 struct iovec iv[(NFS_MAXPATHLEN+MLEN-1)/MLEN]; 483 struct iovec *ivp = iv; 484 struct mbuf *mp; 485 u_int32_t *tl; 486 int32_t t1; 487 caddr_t bpos; 488 int error = 0, rdonly, cache, i, padlen, getret; 489 uint32_t len; 490 int v3 = (nfsd->nd_flag & ND_NFSV3); 491 char *cp2; 492 struct mbuf *mb, *mp2 = NULL, *mp3 = NULL, *mreq; 493 struct vnode *vp; 494 struct vattr attr; 495 nfsfh_t nfh; 496 fhandle_t *fhp; 497 struct uio io, *uiop = &io; 498 u_quad_t frev; 499 500 fhp = &nfh.fh_generic; 501 nfsm_srvmtofh(fhp); 502 len = 0; 503 i = 0; 504 while (len < NFS_MAXPATHLEN) { 505 mp = m_get(M_WAIT, MT_DATA); 506 MCLAIM(mp, &nfs_mowner); 507 m_clget(mp, M_WAIT); 508 mp->m_len = NFSMSIZ(mp); 509 if (len == 0) 510 mp3 = mp2 = mp; 511 else { 512 mp2->m_next = mp; 513 mp2 = mp; 514 } 515 if ((len+mp->m_len) > NFS_MAXPATHLEN) { 516 mp->m_len = NFS_MAXPATHLEN-len; 517 len = NFS_MAXPATHLEN; 518 } else 519 len += mp->m_len; 520 ivp->iov_base = mtod(mp, caddr_t); 521 ivp->iov_len = mp->m_len; 522 i++; 523 ivp++; 524 } 525 uiop->uio_iov = iv; 526 uiop->uio_iovcnt = i; 527 uiop->uio_offset = 0; 528 uiop->uio_resid = len; 529 uiop->uio_rw = UIO_READ; 530 UIO_SETUP_SYSSPACE(uiop); 531 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 532 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 533 if (error) { 534 m_freem(mp3); 535 nfsm_reply(2 * NFSX_UNSIGNED); 536 nfsm_srvpostop_attr(1, (struct vattr *)0); 537 return (0); 538 } 539 if (vp->v_type != VLNK) { 540 if (v3) 541 error = EINVAL; 542 else 543 error = ENXIO; 544 goto out; 545 } 546 nqsrv_getl(vp, ND_READ); 547 error = VOP_READLINK(vp, uiop, cred); 548 out: 549 getret = VOP_GETATTR(vp, &attr, cred, lwp); 550 vput(vp); 551 if (error) 552 m_freem(mp3); 553 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_UNSIGNED); 554 if (v3) { 555 nfsm_srvpostop_attr(getret, &attr); 556 if (error) 557 return (0); 558 } 559 len -= uiop->uio_resid; 560 padlen = nfsm_padlen(len); 561 if (uiop->uio_resid || padlen) 562 nfs_zeropad(mp3, uiop->uio_resid, padlen); 563 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 564 *tl = txdr_unsigned(len); 565 mb->m_next = mp3; 566 nfsm_srvdone; 567 } 568 569 /* 570 * nfs read service 571 */ 572 int 573 nfsrv_read(nfsd, slp, lwp, mrq) 574 struct nfsrv_descript *nfsd; 575 struct nfssvc_sock *slp; 576 struct lwp *lwp; 577 struct mbuf **mrq; 578 { 579 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 580 struct mbuf *nam = nfsd->nd_nam; 581 caddr_t dpos = nfsd->nd_dpos; 582 kauth_cred_t cred = nfsd->nd_cr; 583 struct mbuf *m; 584 struct nfs_fattr *fp; 585 u_int32_t *tl; 586 int32_t t1; 587 int i; 588 caddr_t bpos; 589 int error = 0, rdonly, cache, getret; 590 int v3 = (nfsd->nd_flag & ND_NFSV3); 591 uint32_t reqlen, len, cnt, left; 592 int padlen; 593 char *cp2; 594 struct mbuf *mb, *mreq; 595 struct vnode *vp; 596 nfsfh_t nfh; 597 fhandle_t *fhp; 598 struct uio io, *uiop = &io; 599 struct vattr va; 600 off_t off; 601 u_quad_t frev; 602 603 fhp = &nfh.fh_generic; 604 nfsm_srvmtofh(fhp); 605 if (v3) { 606 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 607 off = fxdr_hyper(tl); 608 } else { 609 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 610 off = (off_t)fxdr_unsigned(u_int32_t, *tl); 611 } 612 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 613 reqlen = fxdr_unsigned(uint32_t, *tl); 614 reqlen = MIN(reqlen, NFS_SRVMAXDATA(nfsd)); 615 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 616 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 617 if (error) { 618 nfsm_reply(2 * NFSX_UNSIGNED); 619 nfsm_srvpostop_attr(1, (struct vattr *)0); 620 return (0); 621 } 622 if (vp->v_type != VREG) { 623 if (v3) 624 error = EINVAL; 625 else 626 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 627 } 628 if (!error) { 629 nqsrv_getl(vp, ND_READ); 630 if ((error = nfsrv_access(vp, VREAD, cred, rdonly, lwp, 1)) != 0) 631 error = nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 1); 632 } 633 getret = VOP_GETATTR(vp, &va, cred, lwp); 634 if (!error) 635 error = getret; 636 if (error) { 637 vput(vp); 638 nfsm_reply(NFSX_POSTOPATTR(v3)); 639 nfsm_srvpostop_attr(getret, &va); 640 return (0); 641 } 642 if (off >= va.va_size) 643 cnt = 0; 644 else if ((off + reqlen) > va.va_size) 645 cnt = va.va_size - off; 646 else 647 cnt = reqlen; 648 nfsm_reply(NFSX_POSTOPORFATTR(v3) + 3 * NFSX_UNSIGNED+nfsm_rndup(cnt)); 649 if (v3) { 650 nfsm_build(tl, u_int32_t *, NFSX_V3FATTR + 4 * NFSX_UNSIGNED); 651 *tl++ = nfs_true; 652 fp = (struct nfs_fattr *)tl; 653 tl += (NFSX_V3FATTR / sizeof (u_int32_t)); 654 } else { 655 nfsm_build(tl, u_int32_t *, NFSX_V2FATTR + NFSX_UNSIGNED); 656 fp = (struct nfs_fattr *)tl; 657 tl += (NFSX_V2FATTR / sizeof (u_int32_t)); 658 } 659 len = left = cnt; 660 if (cnt > 0) { 661 if (nfsd_use_loan) { 662 struct vm_page **pgpp; 663 voff_t pgoff = trunc_page(off); 664 int npages; 665 vaddr_t lva; 666 667 npages = (round_page(off + cnt) - pgoff) >> PAGE_SHIFT; 668 KASSERT(npages <= M_EXT_MAXPAGES); /* XXX */ 669 670 /* allocate kva for mbuf data */ 671 lva = sokvaalloc(npages << PAGE_SHIFT, slp->ns_so); 672 if (lva == 0) { 673 /* fall back to VOP_READ */ 674 goto loan_fail; 675 } 676 677 /* allocate mbuf */ 678 m = m_get(M_WAIT, MT_DATA); 679 MCLAIM(m, &nfs_mowner); 680 pgpp = m->m_ext.ext_pgs; 681 682 /* loan pages */ 683 error = uvm_loanuobjpages(&vp->v_uobj, pgoff, npages, 684 pgpp); 685 if (error) { 686 sokvafree(lva, npages << PAGE_SHIFT); 687 m_free(m); 688 if (error == EBUSY) 689 goto loan_fail; 690 goto read_error; 691 } 692 693 /* associate kva to mbuf */ 694 MEXTADD(m, (void *)(lva + ((vaddr_t)off & PAGE_MASK)), 695 cnt, M_MBUF, soloanfree, slp->ns_so); 696 m->m_flags |= M_EXT_PAGES | M_EXT_ROMAP; 697 m->m_len = cnt; 698 699 /* map pages */ 700 for (i = 0; i < npages; i++) { 701 pmap_kenter_pa(lva, VM_PAGE_TO_PHYS(pgpp[i]), 702 VM_PROT_READ); 703 lva += PAGE_SIZE; 704 } 705 706 pmap_update(pmap_kernel()); 707 708 mb->m_next = m; 709 mb = m; 710 error = 0; 711 uiop->uio_resid = 0; 712 } else { 713 struct iovec *iv; 714 struct iovec *iv2; 715 struct mbuf *m2; 716 int siz; 717 loan_fail: 718 /* 719 * Generate the mbuf list with the uio_iov ref. to it. 720 */ 721 i = 0; 722 m = m2 = mb; 723 while (left > 0) { 724 siz = min(M_TRAILINGSPACE(m), left); 725 if (siz > 0) { 726 left -= siz; 727 i++; 728 } 729 if (left > 0) { 730 m = m_get(M_WAIT, MT_DATA); 731 MCLAIM(m, &nfs_mowner); 732 m_clget(m, M_WAIT); 733 m->m_len = 0; 734 m2->m_next = m; 735 m2 = m; 736 } 737 } 738 iv = malloc(i * sizeof(struct iovec), M_TEMP, M_WAITOK); 739 uiop->uio_iov = iv2 = iv; 740 m = mb; 741 left = cnt; 742 i = 0; 743 while (left > 0) { 744 if (m == NULL) 745 panic("nfsrv_read iov"); 746 siz = min(M_TRAILINGSPACE(m), left); 747 if (siz > 0) { 748 iv->iov_base = mtod(m, caddr_t) + 749 m->m_len; 750 iv->iov_len = siz; 751 m->m_len += siz; 752 left -= siz; 753 iv++; 754 i++; 755 } 756 m = m->m_next; 757 } 758 uiop->uio_iovcnt = i; 759 uiop->uio_offset = off; 760 uiop->uio_resid = cnt; 761 uiop->uio_rw = UIO_READ; 762 UIO_SETUP_SYSSPACE(uiop); 763 error = VOP_READ(vp, uiop, IO_NODELOCKED, cred); 764 free((caddr_t)iv2, M_TEMP); 765 } 766 read_error: 767 if (error || (getret = VOP_GETATTR(vp, &va, cred, lwp)) != 0){ 768 if (!error) 769 error = getret; 770 m_freem(mreq); 771 vput(vp); 772 nfsm_reply(NFSX_POSTOPATTR(v3)); 773 nfsm_srvpostop_attr(getret, &va); 774 return (0); 775 } 776 } else { 777 uiop->uio_resid = 0; 778 } 779 vput(vp); 780 nfsm_srvfillattr(&va, fp); 781 len -= uiop->uio_resid; 782 padlen = nfsm_padlen(len); 783 if (uiop->uio_resid || padlen) 784 nfs_zeropad(mb, uiop->uio_resid, padlen); 785 if (v3) { 786 /* count */ 787 *tl++ = txdr_unsigned(len); 788 /* eof */ 789 if (off + len >= va.va_size) 790 *tl++ = nfs_true; 791 else 792 *tl++ = nfs_false; 793 } 794 *tl = txdr_unsigned(len); 795 nfsm_srvdone; 796 } 797 798 /* 799 * nfs write service 800 */ 801 int 802 nfsrv_write(nfsd, slp, lwp, mrq) 803 struct nfsrv_descript *nfsd; 804 struct nfssvc_sock *slp; 805 struct lwp *lwp; 806 struct mbuf **mrq; 807 { 808 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 809 struct mbuf *nam = nfsd->nd_nam; 810 caddr_t dpos = nfsd->nd_dpos; 811 kauth_cred_t cred = nfsd->nd_cr; 812 struct iovec *ivp; 813 int i, cnt; 814 struct mbuf *mp; 815 struct nfs_fattr *fp; 816 struct iovec *iv; 817 struct vattr va, forat; 818 u_int32_t *tl; 819 int32_t t1; 820 caddr_t bpos; 821 int error = 0, rdonly, cache, len, forat_ret = 1; 822 int ioflags, aftat_ret = 1, retlen, zeroing, adjust; 823 int stable = NFSV3WRITE_FILESYNC; 824 int v3 = (nfsd->nd_flag & ND_NFSV3); 825 char *cp2; 826 struct mbuf *mb, *mreq; 827 struct vnode *vp; 828 nfsfh_t nfh; 829 fhandle_t *fhp; 830 struct uio io, *uiop = &io; 831 off_t off; 832 u_quad_t frev; 833 struct mount *mntp = NULL; 834 835 if (mrep == NULL) { 836 *mrq = NULL; 837 return (0); 838 } 839 fhp = &nfh.fh_generic; 840 nfsm_srvmtofh(fhp); 841 if ((mntp = vfs_getvfs(&fhp->fh_fsid)) == NULL) 842 return (ESTALE); 843 vn_start_write(NULL, &mntp, V_WAIT); 844 if (v3) { 845 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 846 off = fxdr_hyper(tl); 847 tl += 3; 848 stable = fxdr_unsigned(int, *tl++); 849 } else { 850 nfsm_dissect(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 851 off = (off_t)fxdr_unsigned(u_int32_t, *++tl); 852 tl += 2; 853 } 854 retlen = len = fxdr_unsigned(int32_t, *tl); 855 cnt = i = 0; 856 857 /* 858 * For NFS Version 2, it is not obvious what a write of zero length 859 * should do, but I might as well be consistent with Version 3, 860 * which is to return ok so long as there are no permission problems. 861 */ 862 if (len > 0) { 863 zeroing = 1; 864 mp = mrep; 865 while (mp) { 866 if (mp == md) { 867 zeroing = 0; 868 adjust = dpos - mtod(mp, caddr_t); 869 mp->m_len -= adjust; 870 if (mp->m_len > 0 && adjust > 0) 871 NFSMADV(mp, adjust); 872 } 873 if (zeroing) 874 mp->m_len = 0; 875 else if (mp->m_len > 0) { 876 i += mp->m_len; 877 if (i > len) { 878 mp->m_len -= (i - len); 879 zeroing = 1; 880 } 881 if (mp->m_len > 0) 882 cnt++; 883 } 884 mp = mp->m_next; 885 } 886 } 887 if (len > NFS_MAXDATA || len < 0 || i < len) { 888 error = EIO; 889 nfsm_reply(2 * NFSX_UNSIGNED); 890 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 891 vn_finished_write(mntp, 0); 892 return (0); 893 } 894 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 895 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 896 if (error) { 897 nfsm_reply(2 * NFSX_UNSIGNED); 898 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 899 vn_finished_write(mntp, 0); 900 return (0); 901 } 902 if (v3) 903 forat_ret = VOP_GETATTR(vp, &forat, cred, lwp); 904 if (vp->v_type != VREG) { 905 if (v3) 906 error = EINVAL; 907 else 908 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 909 } 910 if (!error) { 911 nqsrv_getl(vp, ND_WRITE); 912 error = nfsrv_access(vp, VWRITE, cred, rdonly, lwp, 1); 913 } 914 if (error) { 915 vput(vp); 916 nfsm_reply(NFSX_WCCDATA(v3)); 917 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 918 vn_finished_write(mntp, 0); 919 return (0); 920 } 921 922 if (len > 0) { 923 ivp = malloc(cnt * sizeof (struct iovec), M_TEMP, M_WAITOK); 924 uiop->uio_iov = iv = ivp; 925 uiop->uio_iovcnt = cnt; 926 mp = mrep; 927 while (mp) { 928 if (mp->m_len > 0) { 929 ivp->iov_base = mtod(mp, caddr_t); 930 ivp->iov_len = mp->m_len; 931 ivp++; 932 } 933 mp = mp->m_next; 934 } 935 936 /* 937 * XXX 938 * The IO_METASYNC flag indicates that all metadata (and not 939 * just enough to ensure data integrity) must be written to 940 * stable storage synchronously. 941 * (IO_METASYNC is not yet implemented in 4.4BSD-Lite.) 942 */ 943 if (stable == NFSV3WRITE_UNSTABLE) 944 ioflags = IO_NODELOCKED; 945 else if (stable == NFSV3WRITE_DATASYNC) 946 ioflags = (IO_SYNC | IO_NODELOCKED); 947 else 948 ioflags = (IO_METASYNC | IO_SYNC | IO_NODELOCKED); 949 uiop->uio_resid = len; 950 uiop->uio_rw = UIO_WRITE; 951 uiop->uio_offset = off; 952 UIO_SETUP_SYSSPACE(uiop); 953 error = VOP_WRITE(vp, uiop, ioflags, cred); 954 nfsstats.srvvop_writes++; 955 free(iv, M_TEMP); 956 } 957 aftat_ret = VOP_GETATTR(vp, &va, cred, lwp); 958 vput(vp); 959 vn_finished_write(mntp, 0); 960 if (!error) 961 error = aftat_ret; 962 nfsm_reply(NFSX_PREOPATTR(v3) + NFSX_POSTOPORFATTR(v3) + 963 2 * NFSX_UNSIGNED + NFSX_WRITEVERF(v3)); 964 if (v3) { 965 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 966 if (error) 967 return (0); 968 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 969 *tl++ = txdr_unsigned(retlen); 970 if (stable == NFSV3WRITE_UNSTABLE) 971 *tl++ = txdr_unsigned(stable); 972 else 973 *tl++ = txdr_unsigned(NFSV3WRITE_FILESYNC); 974 /* 975 * Actually, there is no need to txdr these fields, 976 * but it may make the values more human readable, 977 * for debugging purposes. 978 */ 979 *tl++ = txdr_unsigned(boottime.tv_sec); 980 *tl = txdr_unsigned(boottime.tv_usec); 981 } else { 982 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 983 nfsm_srvfillattr(&va, fp); 984 } 985 nfsm_srvdone; 986 } 987 988 /* 989 * XXX elad: the original NFSW_SAMECRED() macro also made sure the 990 * two nd_flag fields of the descriptors contained 991 * ND_KERBAUTH. 992 */ 993 static int 994 nfsrv_samecred(kauth_cred_t cred1, kauth_cred_t cred2) 995 { 996 int i, do_ngroups; 997 998 if (kauth_cred_geteuid(cred1) != kauth_cred_geteuid(cred2)) 999 return (0); 1000 if (kauth_cred_ngroups(cred1) != kauth_cred_ngroups(cred2)) 1001 return (0); 1002 do_ngroups = kauth_cred_ngroups(cred1); 1003 for (i = 0; i < do_ngroups; i++) 1004 if (kauth_cred_group(cred1, i) != 1005 kauth_cred_group(cred2, i)) 1006 return (0); 1007 1008 return (1); 1009 } 1010 1011 /* 1012 * NFS write service with write gathering support. Called when 1013 * nfsrvw_procrastinate > 0. 1014 * See: Chet Juszczak, "Improving the Write Performance of an NFS Server", 1015 * in Proc. of the Winter 1994 Usenix Conference, pg. 247-259, San Franscisco, 1016 * Jan. 1994. 1017 */ 1018 int 1019 nfsrv_writegather(ndp, slp, lwp, mrq) 1020 struct nfsrv_descript **ndp; 1021 struct nfssvc_sock *slp; 1022 struct lwp *lwp; 1023 struct mbuf **mrq; 1024 { 1025 struct iovec *ivp; 1026 struct mbuf *mp; 1027 struct nfsrv_descript *wp, *nfsd, *owp, *swp; 1028 struct nfs_fattr *fp; 1029 int i = 0; 1030 struct iovec *iov; 1031 struct nfsrvw_delayhash *wpp; 1032 kauth_cred_t cred; 1033 struct vattr va, forat; 1034 u_int32_t *tl; 1035 int32_t t1; 1036 caddr_t bpos, dpos; 1037 int error = 0, rdonly, cache, len = 0, forat_ret = 1; 1038 int ioflags, aftat_ret = 1, s, adjust, v3, zeroing; 1039 char *cp2; 1040 struct mbuf *mb, *mreq, *mrep, *md; 1041 struct vnode *vp; 1042 struct uio io, *uiop = &io; 1043 u_quad_t frev, cur_usec; 1044 struct mount *mntp = NULL; 1045 1046 *mrq = NULL; 1047 if (*ndp) { 1048 nfsd = *ndp; 1049 *ndp = NULL; 1050 mrep = nfsd->nd_mrep; 1051 md = nfsd->nd_md; 1052 dpos = nfsd->nd_dpos; 1053 cred = nfsd->nd_cr; 1054 v3 = (nfsd->nd_flag & ND_NFSV3); 1055 LIST_INIT(&nfsd->nd_coalesce); 1056 nfsd->nd_mreq = NULL; 1057 nfsd->nd_stable = NFSV3WRITE_FILESYNC; 1058 cur_usec = (u_quad_t)time.tv_sec * 1000000 + (u_quad_t)time.tv_usec; 1059 nfsd->nd_time = cur_usec + nfsrvw_procrastinate; 1060 1061 /* 1062 * Now, get the write header.. 1063 */ 1064 nfsm_srvmtofh(&nfsd->nd_fh); 1065 if (v3) { 1066 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 1067 nfsd->nd_off = fxdr_hyper(tl); 1068 tl += 3; 1069 nfsd->nd_stable = fxdr_unsigned(int, *tl++); 1070 } else { 1071 nfsm_dissect(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1072 nfsd->nd_off = (off_t)fxdr_unsigned(u_int32_t, *++tl); 1073 tl += 2; 1074 } 1075 len = fxdr_unsigned(int32_t, *tl); 1076 nfsd->nd_len = len; 1077 nfsd->nd_eoff = nfsd->nd_off + len; 1078 1079 /* 1080 * Trim the header out of the mbuf list and trim off any trailing 1081 * junk so that the mbuf list has only the write data. 1082 */ 1083 zeroing = 1; 1084 i = 0; 1085 mp = mrep; 1086 while (mp) { 1087 if (mp == md) { 1088 zeroing = 0; 1089 adjust = dpos - mtod(mp, caddr_t); 1090 mp->m_len -= adjust; 1091 if (mp->m_len > 0 && adjust > 0) 1092 NFSMADV(mp, adjust); 1093 } 1094 if (zeroing) 1095 mp->m_len = 0; 1096 else { 1097 i += mp->m_len; 1098 if (i > len) { 1099 mp->m_len -= (i - len); 1100 zeroing = 1; 1101 } 1102 } 1103 mp = mp->m_next; 1104 } 1105 if (len > NFS_MAXDATA || len < 0 || i < len) { 1106 nfsmout: 1107 m_freem(mrep); 1108 error = EIO; 1109 nfsm_writereply(2 * NFSX_UNSIGNED, v3); 1110 if (v3) 1111 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1112 nfsd->nd_mreq = mreq; 1113 nfsd->nd_mrep = NULL; 1114 nfsd->nd_time = 0; 1115 } 1116 1117 /* 1118 * Add this entry to the hash and time queues. 1119 */ 1120 s = splsoftclock(); 1121 owp = NULL; 1122 wp = LIST_FIRST(&slp->ns_tq); 1123 while (wp && wp->nd_time < nfsd->nd_time) { 1124 owp = wp; 1125 wp = LIST_NEXT(wp, nd_tq); 1126 } 1127 if (owp) { 1128 LIST_INSERT_AFTER(owp, nfsd, nd_tq); 1129 } else { 1130 LIST_INSERT_HEAD(&slp->ns_tq, nfsd, nd_tq); 1131 } 1132 if (nfsd->nd_mrep) { 1133 wpp = NWDELAYHASH(slp, nfsd->nd_fh.fh_fid.fid_data); 1134 owp = NULL; 1135 wp = LIST_FIRST(wpp); 1136 while (wp && 1137 memcmp(&nfsd->nd_fh, &wp->nd_fh, NFSX_V3FH)) { 1138 owp = wp; 1139 wp = LIST_NEXT(wp, nd_hash); 1140 } 1141 while (wp && wp->nd_off < nfsd->nd_off && 1142 !memcmp(&nfsd->nd_fh, &wp->nd_fh, NFSX_V3FH)) { 1143 owp = wp; 1144 wp = LIST_NEXT(wp, nd_hash); 1145 } 1146 if (owp) { 1147 LIST_INSERT_AFTER(owp, nfsd, nd_hash); 1148 1149 /* 1150 * Search the hash list for overlapping entries and 1151 * coalesce. 1152 */ 1153 for(; nfsd && NFSW_CONTIG(owp, nfsd); nfsd = wp) { 1154 wp = LIST_NEXT(nfsd, nd_hash); 1155 if (nfsrv_samecred(owp->nd_cr, nfsd->nd_cr)) 1156 nfsrvw_coalesce(owp, nfsd); 1157 } 1158 } else { 1159 LIST_INSERT_HEAD(wpp, nfsd, nd_hash); 1160 } 1161 } 1162 splx(s); 1163 } 1164 1165 /* 1166 * Now, do VOP_WRITE()s for any one(s) that need to be done now 1167 * and generate the associated reply mbuf list(s). 1168 */ 1169 loop1: 1170 cur_usec = (u_quad_t)time.tv_sec * 1000000 + (u_quad_t)time.tv_usec; 1171 s = splsoftclock(); 1172 for (nfsd = LIST_FIRST(&slp->ns_tq); nfsd; nfsd = owp) { 1173 owp = LIST_NEXT(nfsd, nd_tq); 1174 if (nfsd->nd_time > cur_usec) 1175 break; 1176 if (nfsd->nd_mreq) 1177 continue; 1178 LIST_REMOVE(nfsd, nd_tq); 1179 LIST_REMOVE(nfsd, nd_hash); 1180 splx(s); 1181 mrep = nfsd->nd_mrep; 1182 nfsd->nd_mrep = NULL; 1183 cred = nfsd->nd_cr; 1184 v3 = (nfsd->nd_flag & ND_NFSV3); 1185 forat_ret = aftat_ret = 1; 1186 error = nfsrv_fhtovp(&nfsd->nd_fh, 1, &vp, cred, slp, 1187 nfsd->nd_nam, &rdonly, (nfsd->nd_flag & ND_KERBAUTH), 1188 FALSE); 1189 if (!error) { 1190 if (v3) 1191 forat_ret = VOP_GETATTR(vp, &forat, cred, lwp); 1192 if (vp->v_type != VREG) { 1193 if (v3) 1194 error = EINVAL; 1195 else 1196 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 1197 } 1198 } else 1199 vp = NULL; 1200 if (!error) { 1201 nqsrv_getl(vp, ND_WRITE); 1202 error = nfsrv_access(vp, VWRITE, cred, rdonly, lwp, 1); 1203 } 1204 1205 if (nfsd->nd_stable == NFSV3WRITE_UNSTABLE) 1206 ioflags = IO_NODELOCKED; 1207 else if (nfsd->nd_stable == NFSV3WRITE_DATASYNC) 1208 ioflags = (IO_SYNC | IO_NODELOCKED); 1209 else 1210 ioflags = (IO_METASYNC | IO_SYNC | IO_NODELOCKED); 1211 uiop->uio_rw = UIO_WRITE; 1212 uiop->uio_offset = nfsd->nd_off; 1213 uiop->uio_resid = nfsd->nd_eoff - nfsd->nd_off; 1214 UIO_SETUP_SYSSPACE(uiop); 1215 if (uiop->uio_resid > 0) { 1216 mp = mrep; 1217 i = 0; 1218 while (mp) { 1219 if (mp->m_len > 0) 1220 i++; 1221 mp = mp->m_next; 1222 } 1223 uiop->uio_iovcnt = i; 1224 iov = malloc(i * sizeof (struct iovec), M_TEMP, M_WAITOK); 1225 uiop->uio_iov = ivp = iov; 1226 mp = mrep; 1227 while (mp) { 1228 if (mp->m_len > 0) { 1229 ivp->iov_base = mtod(mp, caddr_t); 1230 ivp->iov_len = mp->m_len; 1231 ivp++; 1232 } 1233 mp = mp->m_next; 1234 } 1235 if (!error) { 1236 if (vn_start_write(vp, &mntp, V_NOWAIT) != 0) { 1237 VOP_UNLOCK(vp, 0); 1238 vn_start_write(NULL, &mntp, V_WAIT); 1239 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 1240 } 1241 if (!error) { 1242 error = VOP_WRITE(vp, uiop, ioflags, cred); 1243 nfsstats.srvvop_writes++; 1244 vn_finished_write(mntp, 0); 1245 } 1246 } 1247 free((caddr_t)iov, M_TEMP); 1248 } 1249 m_freem(mrep); 1250 if (vp) { 1251 aftat_ret = VOP_GETATTR(vp, &va, cred, lwp); 1252 vput(vp); 1253 } 1254 1255 /* 1256 * Loop around generating replies for all write rpcs that have 1257 * now been completed. 1258 */ 1259 swp = nfsd; 1260 do { 1261 if (error) { 1262 nfsm_writereply(NFSX_WCCDATA(v3), v3); 1263 if (v3) { 1264 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1265 } 1266 } else { 1267 nfsm_writereply(NFSX_PREOPATTR(v3) + 1268 NFSX_POSTOPORFATTR(v3) + 2 * NFSX_UNSIGNED + 1269 NFSX_WRITEVERF(v3), v3); 1270 if (v3) { 1271 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1272 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1273 *tl++ = txdr_unsigned(nfsd->nd_len); 1274 *tl++ = txdr_unsigned(swp->nd_stable); 1275 /* 1276 * Actually, there is no need to txdr these fields, 1277 * but it may make the values more human readable, 1278 * for debugging purposes. 1279 */ 1280 *tl++ = txdr_unsigned(boottime.tv_sec); 1281 *tl = txdr_unsigned(boottime.tv_usec); 1282 } else { 1283 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 1284 nfsm_srvfillattr(&va, fp); 1285 } 1286 } 1287 nfsd->nd_mreq = mreq; 1288 if (nfsd->nd_mrep) 1289 panic("nfsrv_write: nd_mrep not free"); 1290 1291 /* 1292 * Done. Put it at the head of the timer queue so that 1293 * the final phase can return the reply. 1294 */ 1295 s = splsoftclock(); 1296 if (nfsd != swp) { 1297 nfsd->nd_time = 0; 1298 LIST_INSERT_HEAD(&slp->ns_tq, nfsd, nd_tq); 1299 } 1300 nfsd = LIST_FIRST(&swp->nd_coalesce); 1301 if (nfsd) { 1302 LIST_REMOVE(nfsd, nd_tq); 1303 } 1304 splx(s); 1305 } while (nfsd); 1306 s = splsoftclock(); 1307 swp->nd_time = 0; 1308 LIST_INSERT_HEAD(&slp->ns_tq, swp, nd_tq); 1309 splx(s); 1310 goto loop1; 1311 } 1312 splx(s); 1313 1314 /* 1315 * Search for a reply to return. 1316 */ 1317 s = splsoftclock(); 1318 LIST_FOREACH(nfsd, &slp->ns_tq, nd_tq) { 1319 if (nfsd->nd_mreq) { 1320 LIST_REMOVE(nfsd, nd_tq); 1321 *mrq = nfsd->nd_mreq; 1322 *ndp = nfsd; 1323 break; 1324 } 1325 } 1326 splx(s); 1327 return (0); 1328 } 1329 1330 /* 1331 * Coalesce the write request nfsd into owp. To do this we must: 1332 * - remove nfsd from the queues 1333 * - merge nfsd->nd_mrep into owp->nd_mrep 1334 * - update the nd_eoff and nd_stable for owp 1335 * - put nfsd on owp's nd_coalesce list 1336 * NB: Must be called at splsoftclock(). 1337 */ 1338 void 1339 nfsrvw_coalesce(owp, nfsd) 1340 struct nfsrv_descript *owp; 1341 struct nfsrv_descript *nfsd; 1342 { 1343 int overlap; 1344 struct mbuf *mp; 1345 struct nfsrv_descript *m; 1346 1347 LIST_REMOVE(nfsd, nd_hash); 1348 LIST_REMOVE(nfsd, nd_tq); 1349 if (owp->nd_eoff < nfsd->nd_eoff) { 1350 overlap = owp->nd_eoff - nfsd->nd_off; 1351 if (overlap < 0) 1352 panic("nfsrv_coalesce: bad off"); 1353 if (overlap > 0) 1354 m_adj(nfsd->nd_mrep, overlap); 1355 mp = owp->nd_mrep; 1356 while (mp->m_next) 1357 mp = mp->m_next; 1358 mp->m_next = nfsd->nd_mrep; 1359 owp->nd_eoff = nfsd->nd_eoff; 1360 } else 1361 m_freem(nfsd->nd_mrep); 1362 nfsd->nd_mrep = NULL; 1363 if (nfsd->nd_stable == NFSV3WRITE_FILESYNC) 1364 owp->nd_stable = NFSV3WRITE_FILESYNC; 1365 else if (nfsd->nd_stable == NFSV3WRITE_DATASYNC && 1366 owp->nd_stable == NFSV3WRITE_UNSTABLE) 1367 owp->nd_stable = NFSV3WRITE_DATASYNC; 1368 LIST_INSERT_HEAD(&owp->nd_coalesce, nfsd, nd_tq); 1369 /* 1370 * nfsd might hold coalesce elements! Move them to owp. 1371 * Otherwise, requests may be lost and clients will be stuck. 1372 */ 1373 while ((m = LIST_FIRST(&nfsd->nd_coalesce)) != NULL) { 1374 LIST_REMOVE(m, nd_tq); 1375 LIST_INSERT_HEAD(&owp->nd_coalesce, m, nd_tq); 1376 } 1377 } 1378 1379 /* 1380 * nfs create service 1381 * now does a truncate to 0 length via. setattr if it already exists 1382 */ 1383 int 1384 nfsrv_create(nfsd, slp, lwp, mrq) 1385 struct nfsrv_descript *nfsd; 1386 struct nfssvc_sock *slp; 1387 struct lwp *lwp; 1388 struct mbuf **mrq; 1389 { 1390 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1391 struct mbuf *nam = nfsd->nd_nam; 1392 caddr_t dpos = nfsd->nd_dpos; 1393 kauth_cred_t cred = nfsd->nd_cr; 1394 struct nfs_fattr *fp; 1395 struct vattr va, dirfor, diraft; 1396 struct nfsv2_sattr *sp; 1397 u_int32_t *tl; 1398 struct nameidata nd; 1399 caddr_t cp; 1400 int32_t t1; 1401 caddr_t bpos; 1402 int error = 0, cache, len, tsize, dirfor_ret = 1, diraft_ret = 1; 1403 int rdev = 0; 1404 int v3 = (nfsd->nd_flag & ND_NFSV3), how, exclusive_flag = 0; 1405 char *cp2; 1406 struct mbuf *mb, *mreq; 1407 struct vnode *vp = NULL, *dirp = NULL; 1408 nfsfh_t nfh; 1409 fhandle_t *fhp; 1410 u_quad_t frev, tempsize; 1411 u_char cverf[NFSX_V3CREATEVERF]; 1412 struct mount *mp = NULL; 1413 1414 nd.ni_cnd.cn_nameiop = 0; 1415 fhp = &nfh.fh_generic; 1416 nfsm_srvmtofh(fhp); 1417 if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) 1418 return (ESTALE); 1419 vn_start_write(NULL, &mp, V_WAIT); 1420 nfsm_srvnamesiz(len); 1421 nd.ni_cnd.cn_cred = cred; 1422 nd.ni_cnd.cn_nameiop = CREATE; 1423 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 1424 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 1425 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1426 if (dirp) { 1427 if (v3) 1428 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, lwp); 1429 else { 1430 vrele(dirp); 1431 dirp = (struct vnode *)0; 1432 } 1433 } 1434 if (error) { 1435 nfsm_reply(NFSX_WCCDATA(v3)); 1436 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1437 if (dirp) 1438 vrele(dirp); 1439 vn_finished_write(mp, 0); 1440 return (0); 1441 } 1442 VATTR_NULL(&va); 1443 if (v3) { 1444 va.va_mode = 0; 1445 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1446 how = fxdr_unsigned(int, *tl); 1447 switch (how) { 1448 case NFSV3CREATE_GUARDED: 1449 if (nd.ni_vp) { 1450 error = EEXIST; 1451 break; 1452 } 1453 case NFSV3CREATE_UNCHECKED: 1454 nfsm_srvsattr(&va); 1455 break; 1456 case NFSV3CREATE_EXCLUSIVE: 1457 nfsm_dissect(cp, caddr_t, NFSX_V3CREATEVERF); 1458 memcpy(cverf, cp, NFSX_V3CREATEVERF); 1459 exclusive_flag = 1; 1460 break; 1461 }; 1462 va.va_type = VREG; 1463 } else { 1464 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1465 va.va_type = IFTOVT(fxdr_unsigned(u_int32_t, sp->sa_mode)); 1466 if (va.va_type == VNON) 1467 va.va_type = VREG; 1468 va.va_mode = nfstov_mode(sp->sa_mode); 1469 switch (va.va_type) { 1470 case VREG: 1471 tsize = fxdr_unsigned(int32_t, sp->sa_size); 1472 if (tsize != -1) 1473 va.va_size = (u_quad_t)tsize; 1474 break; 1475 case VCHR: 1476 case VBLK: 1477 case VFIFO: 1478 rdev = fxdr_unsigned(int32_t, sp->sa_size); 1479 break; 1480 default: 1481 break; 1482 }; 1483 } 1484 1485 /* 1486 * Iff doesn't exist, create it 1487 * otherwise just truncate to 0 length 1488 * should I set the mode too ?? 1489 */ 1490 if (nd.ni_vp == NULL) { 1491 if (va.va_type == VREG || va.va_type == VSOCK) { 1492 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1493 error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1494 if (!error) { 1495 if (exclusive_flag) { 1496 exclusive_flag = 0; 1497 VATTR_NULL(&va); 1498 /* 1499 * XXX 1500 * assuming NFSX_V3CREATEVERF 1501 * == sizeof(nfstime3) 1502 */ 1503 fxdr_nfsv3time(cverf, &va.va_atime); 1504 error = VOP_SETATTR(nd.ni_vp, &va, cred, 1505 lwp); 1506 } 1507 } 1508 } else if (va.va_type == VCHR || va.va_type == VBLK || 1509 va.va_type == VFIFO) { 1510 if (va.va_type == VCHR && rdev == 0xffffffff) 1511 va.va_type = VFIFO; 1512 if (va.va_type != VFIFO && 1513 (error = kauth_authorize_generic(cred, 1514 KAUTH_GENERIC_ISSUSER, (u_short *)0))) { 1515 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1516 vput(nd.ni_dvp); 1517 nfsm_reply(0); 1518 vn_finished_write(mp, 0); 1519 return (error); 1520 } else 1521 va.va_rdev = (dev_t)rdev; 1522 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1523 error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, 1524 &va); 1525 if (error) { 1526 nfsm_reply(0); 1527 } 1528 if (nd.ni_cnd.cn_flags & ISSYMLINK) { 1529 vrele(nd.ni_dvp); 1530 vput(nd.ni_vp); 1531 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1532 error = EINVAL; 1533 nfsm_reply(0); 1534 } 1535 } else { 1536 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1537 vput(nd.ni_dvp); 1538 error = ENXIO; 1539 } 1540 vp = nd.ni_vp; 1541 } else { 1542 vp = nd.ni_vp; 1543 if (nd.ni_dvp == vp) 1544 vrele(nd.ni_dvp); 1545 else 1546 vput(nd.ni_dvp); 1547 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1548 if (!error && va.va_size != -1) { 1549 error = nfsrv_access(vp, VWRITE, cred, 1550 (nd.ni_cnd.cn_flags & RDONLY), lwp, 0); 1551 if (!error) { 1552 nqsrv_getl(vp, ND_WRITE); 1553 tempsize = va.va_size; 1554 VATTR_NULL(&va); 1555 va.va_size = tempsize; 1556 error = VOP_SETATTR(vp, &va, cred, lwp); 1557 } 1558 } 1559 if (error) 1560 vput(vp); 1561 } 1562 if (!error) { 1563 memset((caddr_t)fhp, 0, sizeof(nfh)); 1564 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsidx; 1565 error = VFS_VPTOFH(vp, &fhp->fh_fid); 1566 if (!error) 1567 error = VOP_GETATTR(vp, &va, cred, lwp); 1568 vput(vp); 1569 } 1570 if (v3) { 1571 if (exclusive_flag && !error) { 1572 /* 1573 * XXX assuming NFSX_V3CREATEVERF == sizeof(nfstime3) 1574 */ 1575 char oldverf[NFSX_V3CREATEVERF]; 1576 1577 txdr_nfsv3time(&va.va_atime, oldverf); 1578 if (memcmp(cverf, oldverf, NFSX_V3CREATEVERF)) 1579 error = EEXIST; 1580 } 1581 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, lwp); 1582 vrele(dirp); 1583 } 1584 nfsm_reply(NFSX_SRVFH(v3) + NFSX_FATTR(v3) + NFSX_WCCDATA(v3)); 1585 if (v3) { 1586 if (!error) { 1587 nfsm_srvpostop_fh(fhp); 1588 nfsm_srvpostop_attr(0, &va); 1589 } 1590 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1591 } else { 1592 nfsm_srvfhtom(fhp, v3); 1593 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 1594 nfsm_srvfillattr(&va, fp); 1595 } 1596 vn_finished_write(mp, 0); 1597 return (0); 1598 nfsmout: 1599 if (dirp) 1600 vrele(dirp); 1601 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1602 if (nd.ni_dvp == nd.ni_vp) 1603 vrele(nd.ni_dvp); 1604 else 1605 vput(nd.ni_dvp); 1606 if (nd.ni_vp) 1607 vput(nd.ni_vp); 1608 vn_finished_write(mp, 0); 1609 return (error); 1610 } 1611 1612 /* 1613 * nfs v3 mknod service 1614 */ 1615 int 1616 nfsrv_mknod(nfsd, slp, lwp, mrq) 1617 struct nfsrv_descript *nfsd; 1618 struct nfssvc_sock *slp; 1619 struct lwp *lwp; 1620 struct mbuf **mrq; 1621 { 1622 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1623 struct mbuf *nam = nfsd->nd_nam; 1624 caddr_t dpos = nfsd->nd_dpos; 1625 kauth_cred_t cred = nfsd->nd_cr; 1626 struct vattr va, dirfor, diraft; 1627 u_int32_t *tl; 1628 struct nameidata nd; 1629 int32_t t1; 1630 caddr_t bpos; 1631 int error = 0, cache, len, dirfor_ret = 1, diraft_ret = 1; 1632 u_int32_t major, minor; 1633 enum vtype vtyp; 1634 char *cp2; 1635 struct mbuf *mb, *mreq; 1636 struct vnode *vp, *dirp = (struct vnode *)0; 1637 nfsfh_t nfh; 1638 fhandle_t *fhp; 1639 u_quad_t frev; 1640 struct mount *mp = NULL; 1641 1642 nd.ni_cnd.cn_nameiop = 0; 1643 fhp = &nfh.fh_generic; 1644 nfsm_srvmtofh(fhp); 1645 if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) 1646 return (ESTALE); 1647 vn_start_write(NULL, &mp, V_WAIT); 1648 nfsm_srvnamesiz(len); 1649 nd.ni_cnd.cn_cred = cred; 1650 nd.ni_cnd.cn_nameiop = CREATE; 1651 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 1652 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 1653 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1654 if (dirp) 1655 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, lwp); 1656 if (error) { 1657 nfsm_reply(NFSX_WCCDATA(1)); 1658 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1659 if (dirp) 1660 vrele(dirp); 1661 vn_finished_write(mp, 0); 1662 return (0); 1663 } 1664 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1665 vtyp = nfsv3tov_type(*tl); 1666 if (vtyp != VCHR && vtyp != VBLK && vtyp != VSOCK && vtyp != VFIFO) { 1667 error = NFSERR_BADTYPE; 1668 goto abort; 1669 } 1670 VATTR_NULL(&va); 1671 va.va_mode = 0; 1672 nfsm_srvsattr(&va); 1673 if (vtyp == VCHR || vtyp == VBLK) { 1674 dev_t rdev; 1675 1676 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1677 major = fxdr_unsigned(u_int32_t, *tl++); 1678 minor = fxdr_unsigned(u_int32_t, *tl); 1679 rdev = makedev(major, minor); 1680 if (major(rdev) != major || minor(rdev) != minor) { 1681 error = EINVAL; 1682 goto abort; 1683 } 1684 va.va_rdev = rdev; 1685 } 1686 1687 /* 1688 * Iff doesn't exist, create it. 1689 */ 1690 if (nd.ni_vp) { 1691 error = EEXIST; 1692 abort: 1693 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1694 if (nd.ni_dvp == nd.ni_vp) 1695 vrele(nd.ni_dvp); 1696 else 1697 vput(nd.ni_dvp); 1698 if (nd.ni_vp) 1699 vput(nd.ni_vp); 1700 goto out; 1701 } 1702 va.va_type = vtyp; 1703 if (vtyp == VSOCK) { 1704 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1705 error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1706 } else { 1707 if (va.va_type != VFIFO && 1708 (error = kauth_authorize_generic(cred, KAUTH_GENERIC_ISSUSER, 1709 (u_short *)0))) { 1710 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1711 vput(nd.ni_dvp); 1712 goto out; 1713 } 1714 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1715 error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1716 if (error) { 1717 goto out; 1718 } 1719 if (error) 1720 goto out; 1721 if (nd.ni_cnd.cn_flags & ISSYMLINK) { 1722 vput(nd.ni_vp); 1723 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1724 error = EINVAL; 1725 } 1726 } 1727 out: 1728 vp = nd.ni_vp; 1729 if (!error) { 1730 memset((caddr_t)fhp, 0, sizeof(nfh)); 1731 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsidx; 1732 error = VFS_VPTOFH(vp, &fhp->fh_fid); 1733 if (!error) 1734 error = VOP_GETATTR(vp, &va, cred, lwp); 1735 vput(vp); 1736 } 1737 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, lwp); 1738 vrele(dirp); 1739 nfsm_reply(NFSX_SRVFH(1) + NFSX_POSTOPATTR(1) + NFSX_WCCDATA(1)); 1740 if (!error) { 1741 nfsm_srvpostop_fh(fhp); 1742 nfsm_srvpostop_attr(0, &va); 1743 } 1744 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1745 vn_finished_write(mp, 0); 1746 return (0); 1747 nfsmout: 1748 if (dirp) 1749 vrele(dirp); 1750 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1751 if (nd.ni_dvp == nd.ni_vp) 1752 vrele(nd.ni_dvp); 1753 else 1754 vput(nd.ni_dvp); 1755 if (nd.ni_vp) 1756 vput(nd.ni_vp); 1757 vn_finished_write(mp, 0); 1758 return (error); 1759 } 1760 1761 /* 1762 * nfs remove service 1763 */ 1764 int 1765 nfsrv_remove(nfsd, slp, lwp, mrq) 1766 struct nfsrv_descript *nfsd; 1767 struct nfssvc_sock *slp; 1768 struct lwp *lwp; 1769 struct mbuf **mrq; 1770 { 1771 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1772 struct mbuf *nam = nfsd->nd_nam; 1773 caddr_t dpos = nfsd->nd_dpos; 1774 kauth_cred_t cred = nfsd->nd_cr; 1775 struct nameidata nd; 1776 u_int32_t *tl; 1777 int32_t t1; 1778 caddr_t bpos; 1779 int error = 0, cache, len, dirfor_ret = 1, diraft_ret = 1; 1780 int v3 = (nfsd->nd_flag & ND_NFSV3); 1781 char *cp2; 1782 struct mbuf *mb, *mreq; 1783 struct vnode *vp, *dirp; 1784 struct vattr dirfor, diraft; 1785 nfsfh_t nfh; 1786 fhandle_t *fhp; 1787 u_quad_t frev; 1788 struct mount *mp = NULL; 1789 1790 #ifndef nolint 1791 vp = (struct vnode *)0; 1792 #endif 1793 fhp = &nfh.fh_generic; 1794 nfsm_srvmtofh(fhp); 1795 if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) 1796 return (ESTALE); 1797 vn_start_write(NULL, &mp, V_WAIT); 1798 nfsm_srvnamesiz(len); 1799 nd.ni_cnd.cn_cred = cred; 1800 nd.ni_cnd.cn_nameiop = DELETE; 1801 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 1802 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 1803 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1804 if (dirp) { 1805 if (v3) 1806 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, lwp); 1807 else 1808 vrele(dirp); 1809 } 1810 if (!error) { 1811 vp = nd.ni_vp; 1812 if (vp->v_type == VDIR && 1813 (error = kauth_authorize_generic(cred, KAUTH_GENERIC_ISSUSER, 1814 (u_short *)0)) != 0) 1815 goto out; 1816 /* 1817 * The root of a mounted filesystem cannot be deleted. 1818 */ 1819 if (vp->v_flag & VROOT) { 1820 error = EBUSY; 1821 goto out; 1822 } 1823 out: 1824 if (!error) { 1825 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1826 nqsrv_getl(vp, ND_WRITE); 1827 error = VOP_REMOVE(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); 1828 } else { 1829 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1830 if (nd.ni_dvp == vp) 1831 vrele(nd.ni_dvp); 1832 else 1833 vput(nd.ni_dvp); 1834 vput(vp); 1835 } 1836 } 1837 if (dirp && v3) { 1838 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, lwp); 1839 vrele(dirp); 1840 } 1841 nfsm_reply(NFSX_WCCDATA(v3)); 1842 if (v3) { 1843 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1844 vn_finished_write(mp, 0); 1845 return (0); 1846 } 1847 vn_finished_write(mp, 0); 1848 nfsm_srvdone; 1849 } 1850 1851 /* 1852 * nfs rename service 1853 */ 1854 int 1855 nfsrv_rename(nfsd, slp, lwp, mrq) 1856 struct nfsrv_descript *nfsd; 1857 struct nfssvc_sock *slp; 1858 struct lwp *lwp; 1859 struct mbuf **mrq; 1860 { 1861 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1862 struct mbuf *nam = nfsd->nd_nam; 1863 caddr_t dpos = nfsd->nd_dpos; 1864 kauth_cred_t cred = nfsd->nd_cr; 1865 u_int32_t *tl; 1866 int32_t t1; 1867 caddr_t bpos; 1868 int error = 0, cache, fdirfor_ret = 1, fdiraft_ret = 1; 1869 uint32_t len, len2; 1870 int tdirfor_ret = 1, tdiraft_ret = 1; 1871 int v3 = (nfsd->nd_flag & ND_NFSV3); 1872 char *cp2; 1873 struct mbuf *mb, *mreq; 1874 struct nameidata fromnd, tond; 1875 struct vnode *fvp, *tvp, *tdvp, *fdirp = (struct vnode *)0; 1876 struct vnode *tdirp = (struct vnode *)0; 1877 struct vattr fdirfor, fdiraft, tdirfor, tdiraft; 1878 nfsfh_t fnfh, tnfh; 1879 fhandle_t *ffhp, *tfhp; 1880 u_quad_t frev; 1881 uid_t saved_uid; 1882 struct mount *mp = NULL; 1883 1884 #ifndef nolint 1885 fvp = (struct vnode *)0; 1886 #endif 1887 ffhp = &fnfh.fh_generic; 1888 tfhp = &tnfh.fh_generic; 1889 fromnd.ni_cnd.cn_nameiop = 0; 1890 tond.ni_cnd.cn_nameiop = 0; 1891 nfsm_srvmtofh(ffhp); 1892 if ((mp = vfs_getvfs(&ffhp->fh_fsid)) == NULL) 1893 return (ESTALE); 1894 vn_start_write(NULL, &mp, V_WAIT); 1895 nfsm_srvnamesiz(len); 1896 /* 1897 * Remember our original uid so that we can reset cr_uid before 1898 * the second nfs_namei() call, in case it is remapped. 1899 */ 1900 saved_uid = kauth_cred_geteuid(cred); 1901 fromnd.ni_cnd.cn_cred = cred; 1902 fromnd.ni_cnd.cn_nameiop = DELETE; 1903 fromnd.ni_cnd.cn_flags = WANTPARENT | SAVESTART; 1904 error = nfs_namei(&fromnd, ffhp, len, slp, nam, &md, 1905 &dpos, &fdirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1906 if (fdirp) { 1907 if (v3) 1908 fdirfor_ret = VOP_GETATTR(fdirp, &fdirfor, cred, lwp); 1909 else { 1910 vrele(fdirp); 1911 fdirp = (struct vnode *)0; 1912 } 1913 } 1914 if (error) { 1915 nfsm_reply(2 * NFSX_WCCDATA(v3)); 1916 nfsm_srvwcc_data(fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft); 1917 nfsm_srvwcc_data(tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft); 1918 if (fdirp) 1919 vrele(fdirp); 1920 vn_finished_write(mp, 0); 1921 return (0); 1922 } 1923 fvp = fromnd.ni_vp; 1924 nfsm_srvmtofh(tfhp); 1925 if (v3) { 1926 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 1927 len2 = fxdr_unsigned(uint32_t, *tl); 1928 /* len2 will be checked by nfs_namei */ 1929 } 1930 else { 1931 /* NFSv2 */ 1932 nfsm_strsiz(len2, NFS_MAXNAMLEN); 1933 } 1934 kauth_cred_seteuid(cred, saved_uid); 1935 tond.ni_cnd.cn_cred = cred; 1936 tond.ni_cnd.cn_nameiop = RENAME; 1937 tond.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF | NOCACHE | SAVESTART; 1938 error = nfs_namei(&tond, tfhp, len2, slp, nam, &md, 1939 &dpos, &tdirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1940 if (tdirp) { 1941 if (v3) 1942 tdirfor_ret = VOP_GETATTR(tdirp, &tdirfor, cred, lwp); 1943 else { 1944 vrele(tdirp); 1945 tdirp = (struct vnode *)0; 1946 } 1947 } 1948 if (error) { 1949 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 1950 vrele(fromnd.ni_dvp); 1951 vrele(fvp); 1952 goto out1; 1953 } 1954 tdvp = tond.ni_dvp; 1955 tvp = tond.ni_vp; 1956 if (tvp != NULL) { 1957 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 1958 if (v3) 1959 error = EEXIST; 1960 else 1961 error = EISDIR; 1962 goto out; 1963 } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 1964 if (v3) 1965 error = EEXIST; 1966 else 1967 error = ENOTDIR; 1968 goto out; 1969 } 1970 if (tvp->v_type == VDIR && tvp->v_mountedhere) { 1971 if (v3) 1972 error = EXDEV; 1973 else 1974 error = ENOTEMPTY; 1975 goto out; 1976 } 1977 } 1978 if (fvp->v_type == VDIR && fvp->v_mountedhere) { 1979 if (v3) 1980 error = EXDEV; 1981 else 1982 error = ENOTEMPTY; 1983 goto out; 1984 } 1985 if (fvp->v_mount != tdvp->v_mount) { 1986 if (v3) 1987 error = EXDEV; 1988 else 1989 error = ENOTEMPTY; 1990 goto out; 1991 } 1992 if (fvp == tdvp) { 1993 if (v3) 1994 error = EINVAL; 1995 else 1996 error = ENOTEMPTY; 1997 } 1998 /* 1999 * If source is the same as the destination (that is the 2000 * same vnode with the same name in the same directory), 2001 * then there is nothing to do. 2002 */ 2003 if (fvp == tvp && fromnd.ni_dvp == tdvp && 2004 fromnd.ni_cnd.cn_namelen == tond.ni_cnd.cn_namelen && 2005 !memcmp(fromnd.ni_cnd.cn_nameptr, tond.ni_cnd.cn_nameptr, 2006 fromnd.ni_cnd.cn_namelen)) 2007 error = -1; 2008 out: 2009 if (!error) { 2010 nqsrv_getl(fromnd.ni_dvp, ND_WRITE); 2011 nqsrv_getl(tdvp, ND_WRITE); 2012 if (tvp) { 2013 nqsrv_getl(tvp, ND_WRITE); 2014 } 2015 error = VOP_RENAME(fromnd.ni_dvp, fromnd.ni_vp, &fromnd.ni_cnd, 2016 tond.ni_dvp, tond.ni_vp, &tond.ni_cnd); 2017 } else { 2018 VOP_ABORTOP(tond.ni_dvp, &tond.ni_cnd); 2019 if (tdvp == tvp) 2020 vrele(tdvp); 2021 else 2022 vput(tdvp); 2023 if (tvp) 2024 vput(tvp); 2025 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 2026 vrele(fromnd.ni_dvp); 2027 vrele(fvp); 2028 if (error == -1) 2029 error = 0; 2030 } 2031 vrele(tond.ni_startdir); 2032 PNBUF_PUT(tond.ni_cnd.cn_pnbuf); 2033 out1: 2034 if (fdirp) { 2035 fdiraft_ret = VOP_GETATTR(fdirp, &fdiraft, cred, lwp); 2036 vrele(fdirp); 2037 } 2038 if (tdirp) { 2039 tdiraft_ret = VOP_GETATTR(tdirp, &tdiraft, cred, lwp); 2040 vrele(tdirp); 2041 } 2042 vrele(fromnd.ni_startdir); 2043 PNBUF_PUT(fromnd.ni_cnd.cn_pnbuf); 2044 nfsm_reply(2 * NFSX_WCCDATA(v3)); 2045 if (v3) { 2046 nfsm_srvwcc_data(fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft); 2047 nfsm_srvwcc_data(tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft); 2048 } 2049 vn_finished_write(mp, 0); 2050 return (0); 2051 2052 nfsmout: 2053 if (fdirp) 2054 vrele(fdirp); 2055 if (tdirp) 2056 vrele(tdirp); 2057 if (tond.ni_cnd.cn_nameiop) { 2058 vrele(tond.ni_startdir); 2059 PNBUF_PUT(tond.ni_cnd.cn_pnbuf); 2060 } 2061 if (fromnd.ni_cnd.cn_nameiop) { 2062 vrele(fromnd.ni_startdir); 2063 PNBUF_PUT(fromnd.ni_cnd.cn_pnbuf); 2064 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 2065 vrele(fromnd.ni_dvp); 2066 vrele(fvp); 2067 } 2068 return (error); 2069 } 2070 2071 /* 2072 * nfs link service 2073 */ 2074 int 2075 nfsrv_link(nfsd, slp, lwp, mrq) 2076 struct nfsrv_descript *nfsd; 2077 struct nfssvc_sock *slp; 2078 struct lwp *lwp; 2079 struct mbuf **mrq; 2080 { 2081 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2082 struct mbuf *nam = nfsd->nd_nam; 2083 caddr_t dpos = nfsd->nd_dpos; 2084 kauth_cred_t cred = nfsd->nd_cr; 2085 struct nameidata nd; 2086 u_int32_t *tl; 2087 int32_t t1; 2088 caddr_t bpos; 2089 int error = 0, rdonly, cache, len, dirfor_ret = 1, diraft_ret = 1; 2090 int getret = 1, v3 = (nfsd->nd_flag & ND_NFSV3); 2091 char *cp2; 2092 struct mbuf *mb, *mreq; 2093 struct vnode *vp, *xp, *dirp = (struct vnode *)0; 2094 struct vattr dirfor, diraft, at; 2095 nfsfh_t nfh, dnfh; 2096 fhandle_t *fhp, *dfhp; 2097 u_quad_t frev; 2098 struct mount *mp = NULL; 2099 2100 fhp = &nfh.fh_generic; 2101 dfhp = &dnfh.fh_generic; 2102 nfsm_srvmtofh(fhp); 2103 if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) 2104 return (ESTALE); 2105 vn_start_write(NULL, &mp, V_WAIT); 2106 nfsm_srvmtofh(dfhp); 2107 nfsm_srvnamesiz(len); 2108 error = nfsrv_fhtovp(fhp, FALSE, &vp, cred, slp, nam, 2109 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2110 if (error) { 2111 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2112 nfsm_srvpostop_attr(getret, &at); 2113 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2114 vn_finished_write(mp, 0); 2115 return (0); 2116 } 2117 if (vp->v_type == VDIR && (error = kauth_authorize_generic(cred, 2118 KAUTH_GENERIC_ISSUSER, (u_short *)0)) != 0) 2119 goto out1; 2120 nd.ni_cnd.cn_cred = cred; 2121 nd.ni_cnd.cn_nameiop = CREATE; 2122 nd.ni_cnd.cn_flags = LOCKPARENT; 2123 error = nfs_namei(&nd, dfhp, len, slp, nam, &md, &dpos, 2124 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2125 if (dirp) { 2126 if (v3) 2127 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, lwp); 2128 else { 2129 vrele(dirp); 2130 dirp = (struct vnode *)0; 2131 } 2132 } 2133 if (error) 2134 goto out1; 2135 xp = nd.ni_vp; 2136 if (xp != NULL) { 2137 error = EEXIST; 2138 goto out; 2139 } 2140 xp = nd.ni_dvp; 2141 if (vp->v_mount != xp->v_mount) 2142 error = EXDEV; 2143 out: 2144 if (!error) { 2145 nqsrv_getl(vp, ND_WRITE); 2146 nqsrv_getl(xp, ND_WRITE); 2147 error = VOP_LINK(nd.ni_dvp, vp, &nd.ni_cnd); 2148 } else { 2149 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2150 if (nd.ni_dvp == nd.ni_vp) 2151 vrele(nd.ni_dvp); 2152 else 2153 vput(nd.ni_dvp); 2154 if (nd.ni_vp) 2155 vrele(nd.ni_vp); 2156 } 2157 out1: 2158 if (v3) 2159 getret = VOP_GETATTR(vp, &at, cred, lwp); 2160 if (dirp) { 2161 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, lwp); 2162 vrele(dirp); 2163 } 2164 vrele(vp); 2165 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2166 if (v3) { 2167 nfsm_srvpostop_attr(getret, &at); 2168 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2169 vn_finished_write(mp, 0); 2170 return (0); 2171 } 2172 vn_finished_write(mp, 0); 2173 nfsm_srvdone; 2174 } 2175 2176 /* 2177 * nfs symbolic link service 2178 */ 2179 int 2180 nfsrv_symlink(nfsd, slp, lwp, mrq) 2181 struct nfsrv_descript *nfsd; 2182 struct nfssvc_sock *slp; 2183 struct lwp *lwp; 2184 struct mbuf **mrq; 2185 { 2186 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2187 struct mbuf *nam = nfsd->nd_nam; 2188 caddr_t dpos = nfsd->nd_dpos; 2189 kauth_cred_t cred = nfsd->nd_cr; 2190 struct vattr va, dirfor, diraft; 2191 struct nameidata nd; 2192 u_int32_t *tl; 2193 int32_t t1; 2194 struct nfsv2_sattr *sp; 2195 char *bpos, *pathcp = NULL, *cp2; 2196 struct uio io; 2197 struct iovec iv; 2198 int error = 0, cache, dirfor_ret = 1, diraft_ret = 1; 2199 uint32_t len, len2; 2200 int v3 = (nfsd->nd_flag & ND_NFSV3); 2201 struct mbuf *mb, *mreq; 2202 struct vnode *dirp = (struct vnode *)0; 2203 nfsfh_t nfh; 2204 fhandle_t *fhp; 2205 u_quad_t frev; 2206 struct mount *mp = NULL; 2207 2208 nd.ni_cnd.cn_nameiop = 0; 2209 fhp = &nfh.fh_generic; 2210 nfsm_srvmtofh(fhp); 2211 if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) 2212 return (ESTALE); 2213 vn_start_write(NULL, &mp, V_WAIT); 2214 nfsm_srvnamesiz(len); 2215 nd.ni_cnd.cn_cred = cred; 2216 nd.ni_cnd.cn_nameiop = CREATE; 2217 nd.ni_cnd.cn_flags = LOCKPARENT; 2218 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 2219 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2220 if (dirp) { 2221 if (v3) 2222 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, lwp); 2223 else { 2224 vrele(dirp); 2225 dirp = (struct vnode *)0; 2226 } 2227 } 2228 if (error) 2229 goto out; 2230 VATTR_NULL(&va); 2231 va.va_type = VLNK; 2232 if (v3) { 2233 va.va_mode = 0; 2234 nfsm_srvsattr(&va); 2235 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 2236 len2 = fxdr_unsigned(uint32_t, *tl); 2237 if (len2 > PATH_MAX) { 2238 /* XXX should check _PC_NO_TRUNC */ 2239 error = ENAMETOOLONG; 2240 goto abortop; 2241 } 2242 } 2243 else { 2244 /* NFSv2 */ 2245 nfsm_strsiz(len2, NFS_MAXPATHLEN); 2246 } 2247 pathcp = malloc(len2 + 1, M_TEMP, M_WAITOK); 2248 iv.iov_base = pathcp; 2249 iv.iov_len = len2; 2250 io.uio_resid = len2; 2251 io.uio_offset = 0; 2252 io.uio_iov = &iv; 2253 io.uio_iovcnt = 1; 2254 io.uio_rw = UIO_READ; 2255 UIO_SETUP_SYSSPACE(&io); 2256 nfsm_mtouio(&io, len2); 2257 if (!v3) { 2258 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2259 va.va_mode = fxdr_unsigned(u_int16_t, sp->sa_mode); 2260 } 2261 *(pathcp + len2) = '\0'; 2262 if (nd.ni_vp) { 2263 error = EEXIST; 2264 abortop: 2265 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2266 if (nd.ni_dvp == nd.ni_vp) 2267 vrele(nd.ni_dvp); 2268 else 2269 vput(nd.ni_dvp); 2270 if (nd.ni_vp) 2271 vrele(nd.ni_vp); 2272 goto out; 2273 } 2274 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2275 error = VOP_SYMLINK(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va, pathcp); 2276 if (!error) { 2277 if (v3) { 2278 memset((caddr_t)fhp, 0, sizeof(nfh)); 2279 fhp->fh_fsid = nd.ni_vp->v_mount->mnt_stat.f_fsidx; 2280 error = VFS_VPTOFH(nd.ni_vp, &fhp->fh_fid); 2281 if (!error) 2282 error = VOP_GETATTR(nd.ni_vp, &va, cred, lwp); 2283 vput(nd.ni_vp); 2284 } else { 2285 vput(nd.ni_vp); 2286 } 2287 } 2288 out: 2289 if (pathcp) 2290 free(pathcp, M_TEMP); 2291 if (dirp) { 2292 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, lwp); 2293 vrele(dirp); 2294 } 2295 nfsm_reply(NFSX_SRVFH(v3) + NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2296 if (v3) { 2297 if (!error) { 2298 nfsm_srvpostop_fh(fhp); 2299 nfsm_srvpostop_attr(0, &va); 2300 } 2301 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2302 } 2303 vn_finished_write(mp, 0); 2304 return (0); 2305 nfsmout: 2306 if (dirp) 2307 vrele(dirp); 2308 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2309 if (nd.ni_dvp == nd.ni_vp) 2310 vrele(nd.ni_dvp); 2311 else 2312 vput(nd.ni_dvp); 2313 if (nd.ni_vp) 2314 vrele(nd.ni_vp); 2315 if (pathcp) 2316 free(pathcp, M_TEMP); 2317 vn_finished_write(mp, 0); 2318 return (error); 2319 } 2320 2321 /* 2322 * nfs mkdir service 2323 */ 2324 int 2325 nfsrv_mkdir(nfsd, slp, lwp, mrq) 2326 struct nfsrv_descript *nfsd; 2327 struct nfssvc_sock *slp; 2328 struct lwp *lwp; 2329 struct mbuf **mrq; 2330 { 2331 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2332 struct mbuf *nam = nfsd->nd_nam; 2333 caddr_t dpos = nfsd->nd_dpos; 2334 kauth_cred_t cred = nfsd->nd_cr; 2335 struct vattr va, dirfor, diraft; 2336 struct nfs_fattr *fp; 2337 struct nameidata nd; 2338 caddr_t cp; 2339 u_int32_t *tl; 2340 int32_t t1; 2341 caddr_t bpos; 2342 int error = 0, cache, len, dirfor_ret = 1, diraft_ret = 1; 2343 int v3 = (nfsd->nd_flag & ND_NFSV3); 2344 char *cp2; 2345 struct mbuf *mb, *mreq; 2346 struct vnode *vp, *dirp = (struct vnode *)0; 2347 nfsfh_t nfh; 2348 fhandle_t *fhp; 2349 u_quad_t frev; 2350 struct mount *mp = NULL; 2351 2352 fhp = &nfh.fh_generic; 2353 nfsm_srvmtofh(fhp); 2354 if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) 2355 return (ESTALE); 2356 vn_start_write(NULL, &mp, V_WAIT); 2357 nfsm_srvnamesiz(len); 2358 nd.ni_cnd.cn_cred = cred; 2359 nd.ni_cnd.cn_nameiop = CREATE; 2360 nd.ni_cnd.cn_flags = LOCKPARENT; 2361 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 2362 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2363 if (dirp) { 2364 if (v3) 2365 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, lwp); 2366 else { 2367 vrele(dirp); 2368 dirp = (struct vnode *)0; 2369 } 2370 } 2371 if (error) { 2372 nfsm_reply(NFSX_WCCDATA(v3)); 2373 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2374 if (dirp) 2375 vrele(dirp); 2376 vn_finished_write(mp, 0); 2377 return (0); 2378 } 2379 VATTR_NULL(&va); 2380 if (v3) { 2381 va.va_mode = 0; 2382 nfsm_srvsattr(&va); 2383 } else { 2384 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2385 va.va_mode = nfstov_mode(*tl++); 2386 } 2387 va.va_type = VDIR; 2388 vp = nd.ni_vp; 2389 if (vp != NULL) { 2390 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2391 if (nd.ni_dvp == vp) 2392 vrele(nd.ni_dvp); 2393 else 2394 vput(nd.ni_dvp); 2395 vrele(vp); 2396 error = EEXIST; 2397 goto out; 2398 } 2399 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2400 error = VOP_MKDIR(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 2401 if (!error) { 2402 vp = nd.ni_vp; 2403 memset((caddr_t)fhp, 0, sizeof(nfh)); 2404 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsidx; 2405 error = VFS_VPTOFH(vp, &fhp->fh_fid); 2406 if (!error) 2407 error = VOP_GETATTR(vp, &va, cred, lwp); 2408 vput(vp); 2409 } 2410 out: 2411 if (dirp) { 2412 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, lwp); 2413 vrele(dirp); 2414 } 2415 nfsm_reply(NFSX_SRVFH(v3) + NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2416 if (v3) { 2417 if (!error) { 2418 nfsm_srvpostop_fh(fhp); 2419 nfsm_srvpostop_attr(0, &va); 2420 } 2421 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2422 } else { 2423 nfsm_srvfhtom(fhp, v3); 2424 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 2425 nfsm_srvfillattr(&va, fp); 2426 } 2427 vn_finished_write(mp, 0); 2428 return (0); 2429 nfsmout: 2430 if (dirp) 2431 vrele(dirp); 2432 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2433 if (nd.ni_dvp == nd.ni_vp) 2434 vrele(nd.ni_dvp); 2435 else 2436 vput(nd.ni_dvp); 2437 if (nd.ni_vp) 2438 vrele(nd.ni_vp); 2439 vn_finished_write(mp, 0); 2440 return (error); 2441 } 2442 2443 /* 2444 * nfs rmdir service 2445 */ 2446 int 2447 nfsrv_rmdir(nfsd, slp, lwp, mrq) 2448 struct nfsrv_descript *nfsd; 2449 struct nfssvc_sock *slp; 2450 struct lwp *lwp; 2451 struct mbuf **mrq; 2452 { 2453 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2454 struct mbuf *nam = nfsd->nd_nam; 2455 caddr_t dpos = nfsd->nd_dpos; 2456 kauth_cred_t cred = nfsd->nd_cr; 2457 u_int32_t *tl; 2458 int32_t t1; 2459 caddr_t bpos; 2460 int error = 0, cache, len, dirfor_ret = 1, diraft_ret = 1; 2461 int v3 = (nfsd->nd_flag & ND_NFSV3); 2462 char *cp2; 2463 struct mbuf *mb, *mreq; 2464 struct vnode *vp, *dirp = (struct vnode *)0; 2465 struct vattr dirfor, diraft; 2466 nfsfh_t nfh; 2467 fhandle_t *fhp; 2468 struct nameidata nd; 2469 u_quad_t frev; 2470 struct mount *mp = NULL; 2471 2472 fhp = &nfh.fh_generic; 2473 nfsm_srvmtofh(fhp); 2474 if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) 2475 return (ESTALE); 2476 vn_start_write(NULL, &mp, V_WAIT); 2477 nfsm_srvnamesiz(len); 2478 nd.ni_cnd.cn_cred = cred; 2479 nd.ni_cnd.cn_nameiop = DELETE; 2480 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 2481 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 2482 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2483 if (dirp) { 2484 if (v3) 2485 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, lwp); 2486 else { 2487 vrele(dirp); 2488 dirp = (struct vnode *)0; 2489 } 2490 } 2491 if (error) { 2492 nfsm_reply(NFSX_WCCDATA(v3)); 2493 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2494 if (dirp) 2495 vrele(dirp); 2496 vn_finished_write(mp, 0); 2497 return (0); 2498 } 2499 vp = nd.ni_vp; 2500 if (vp->v_type != VDIR) { 2501 error = ENOTDIR; 2502 goto out; 2503 } 2504 /* 2505 * No rmdir "." please. 2506 */ 2507 if (nd.ni_dvp == vp) { 2508 error = EINVAL; 2509 goto out; 2510 } 2511 /* 2512 * The root of a mounted filesystem cannot be deleted. 2513 */ 2514 if (vp->v_flag & VROOT) 2515 error = EBUSY; 2516 out: 2517 if (!error) { 2518 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2519 nqsrv_getl(vp, ND_WRITE); 2520 error = VOP_RMDIR(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); 2521 } else { 2522 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2523 if (nd.ni_dvp == nd.ni_vp) 2524 vrele(nd.ni_dvp); 2525 else 2526 vput(nd.ni_dvp); 2527 vput(vp); 2528 } 2529 if (dirp) { 2530 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, lwp); 2531 vrele(dirp); 2532 } 2533 nfsm_reply(NFSX_WCCDATA(v3)); 2534 if (v3) { 2535 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2536 vn_finished_write(mp, 0); 2537 return (0); 2538 } 2539 vn_finished_write(mp, 0); 2540 nfsm_srvdone; 2541 } 2542 2543 /* 2544 * nfs readdir service 2545 * - mallocs what it thinks is enough to read 2546 * count rounded up to a multiple of NFS_SRVDIRBLKSIZ <= NFS_MAXREADDIR 2547 * - calls VOP_READDIR() 2548 * - loops around building the reply 2549 * if the output generated exceeds count break out of loop 2550 * The nfsm_clget macro is used here so that the reply will be packed 2551 * tightly in mbuf clusters. 2552 * - it only knows that it has encountered eof when the VOP_READDIR() 2553 * reads nothing 2554 * - as such one readdir rpc will return eof false although you are there 2555 * and then the next will return eof 2556 * - it trims out records with d_fileno == 0 2557 * this doesn't matter for Unix clients, but they might confuse clients 2558 * for other os'. 2559 * - it trims out records with d_type == DT_WHT 2560 * these cannot be seen through NFS (unless we extend the protocol) 2561 * NB: It is tempting to set eof to true if the VOP_READDIR() reads less 2562 * than requested, but this may not apply to all filesystems. For 2563 * example, client NFS does not { although it is never remote mounted 2564 * anyhow } 2565 * The alternate call nfsrv_readdirplus() does lookups as well. 2566 * PS: The NFS protocol spec. does not clarify what the "count" byte 2567 * argument is a count of.. just name strings and file id's or the 2568 * entire reply rpc or ... 2569 * I tried just file name and id sizes and it confused the Sun client, 2570 * so I am using the full rpc size now. The "paranoia.." comment refers 2571 * to including the status longwords that are not a part of the dir. 2572 * "entry" structures, but are in the rpc. 2573 */ 2574 2575 #define NFS_SRVDIRBLKSIZ 1024 2576 2577 struct flrep { 2578 nfsuint64 fl_off; 2579 u_int32_t fl_postopok; 2580 u_int32_t fl_fattr[NFSX_V3FATTR / sizeof (u_int32_t)]; 2581 u_int32_t fl_fhok; 2582 u_int32_t fl_fhsize; 2583 u_int32_t fl_nfh[NFSX_V3FH / sizeof (u_int32_t)]; 2584 }; 2585 2586 int 2587 nfsrv_readdir(nfsd, slp, lwp, mrq) 2588 struct nfsrv_descript *nfsd; 2589 struct nfssvc_sock *slp; 2590 struct lwp *lwp; 2591 struct mbuf **mrq; 2592 { 2593 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2594 struct mbuf *nam = nfsd->nd_nam; 2595 caddr_t dpos = nfsd->nd_dpos; 2596 kauth_cred_t cred = nfsd->nd_cr; 2597 char *bp, *be; 2598 struct mbuf *mp; 2599 struct dirent *dp; 2600 caddr_t cp; 2601 u_int32_t *tl; 2602 int32_t t1; 2603 caddr_t bpos; 2604 struct mbuf *mb, *mreq, *mp2; 2605 char *cpos, *cend, *cp2, *rbuf; 2606 struct vnode *vp; 2607 struct vattr at; 2608 nfsfh_t nfh; 2609 fhandle_t *fhp; 2610 struct uio io; 2611 struct iovec iv; 2612 int len, nlen, rem, xfer, tsiz, i, error = 0, getret = 1; 2613 int siz, cnt, fullsiz, eofflag, rdonly, cache, ncookies; 2614 int v3 = (nfsd->nd_flag & ND_NFSV3); 2615 u_quad_t frev, off, toff, verf; 2616 off_t *cookies = NULL, *cookiep; 2617 nfsuint64 jar; 2618 2619 fhp = &nfh.fh_generic; 2620 nfsm_srvmtofh(fhp); 2621 if (v3) { 2622 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 2623 toff = fxdr_hyper(tl); 2624 tl += 2; 2625 verf = fxdr_hyper(tl); 2626 tl += 2; 2627 } else { 2628 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2629 toff = fxdr_unsigned(u_quad_t, *tl++); 2630 } 2631 off = toff; 2632 cnt = fxdr_unsigned(int, *tl); 2633 siz = ((cnt + NFS_SRVDIRBLKSIZ - 1) & ~(NFS_SRVDIRBLKSIZ - 1)); 2634 xfer = NFS_SRVMAXDATA(nfsd); 2635 if (siz > xfer) 2636 siz = xfer; 2637 fullsiz = siz; 2638 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 2639 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2640 if (!error && vp->v_type != VDIR) { 2641 error = ENOTDIR; 2642 vput(vp); 2643 } 2644 if (error) { 2645 nfsm_reply(NFSX_UNSIGNED); 2646 nfsm_srvpostop_attr(getret, &at); 2647 return (0); 2648 } 2649 nqsrv_getl(vp, ND_READ); 2650 if (v3) { 2651 error = getret = VOP_GETATTR(vp, &at, cred, lwp); 2652 #ifdef NFS3_STRICTVERF 2653 /* 2654 * XXX This check is too strict for Solaris 2.5 clients. 2655 */ 2656 if (!error && toff && verf != at.va_filerev) 2657 error = NFSERR_BAD_COOKIE; 2658 #endif 2659 } 2660 if (!error) 2661 error = nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 0); 2662 if (error) { 2663 vput(vp); 2664 nfsm_reply(NFSX_POSTOPATTR(v3)); 2665 nfsm_srvpostop_attr(getret, &at); 2666 return (0); 2667 } 2668 VOP_UNLOCK(vp, 0); 2669 rbuf = malloc(siz, M_TEMP, M_WAITOK); 2670 again: 2671 iv.iov_base = rbuf; 2672 iv.iov_len = fullsiz; 2673 io.uio_iov = &iv; 2674 io.uio_iovcnt = 1; 2675 io.uio_offset = (off_t)off; 2676 io.uio_resid = fullsiz; 2677 io.uio_rw = UIO_READ; 2678 UIO_SETUP_SYSSPACE(&io); 2679 eofflag = 0; 2680 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2681 2682 error = VOP_READDIR(vp, &io, cred, &eofflag, &cookies, &ncookies); 2683 2684 off = (off_t)io.uio_offset; 2685 if (!cookies && !error) 2686 error = NFSERR_PERM; 2687 if (v3) { 2688 getret = VOP_GETATTR(vp, &at, cred, lwp); 2689 if (!error) 2690 error = getret; 2691 } 2692 2693 VOP_UNLOCK(vp, 0); 2694 if (error) { 2695 vrele(vp); 2696 free((caddr_t)rbuf, M_TEMP); 2697 if (cookies) 2698 free((caddr_t)cookies, M_TEMP); 2699 nfsm_reply(NFSX_POSTOPATTR(v3)); 2700 nfsm_srvpostop_attr(getret, &at); 2701 return (0); 2702 } 2703 if (io.uio_resid) { 2704 siz -= io.uio_resid; 2705 2706 /* 2707 * If nothing read, return eof 2708 * rpc reply 2709 */ 2710 if (siz == 0) { 2711 vrele(vp); 2712 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_COOKIEVERF(v3) + 2713 2 * NFSX_UNSIGNED); 2714 if (v3) { 2715 nfsm_srvpostop_attr(getret, &at); 2716 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 2717 txdr_hyper(at.va_filerev, tl); 2718 tl += 2; 2719 } else 2720 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2721 *tl++ = nfs_false; 2722 *tl = nfs_true; 2723 free((caddr_t)rbuf, M_TEMP); 2724 free((caddr_t)cookies, M_TEMP); 2725 return (0); 2726 } 2727 } 2728 2729 /* 2730 * Check for degenerate cases of nothing useful read. 2731 * If so go try again 2732 */ 2733 cpos = rbuf; 2734 cend = rbuf + siz; 2735 dp = (struct dirent *)cpos; 2736 cookiep = cookies; 2737 2738 while (cpos < cend && ncookies > 0 && 2739 (dp->d_fileno == 0 || dp->d_type == DT_WHT)) { 2740 cpos += dp->d_reclen; 2741 dp = (struct dirent *)cpos; 2742 cookiep++; 2743 ncookies--; 2744 } 2745 if (cpos >= cend || ncookies == 0) { 2746 toff = off; 2747 siz = fullsiz; 2748 goto again; 2749 } 2750 2751 len = 3 * NFSX_UNSIGNED; /* paranoia, probably can be 0 */ 2752 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_COOKIEVERF(v3) + siz); 2753 if (v3) { 2754 nfsm_srvpostop_attr(getret, &at); 2755 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2756 txdr_hyper(at.va_filerev, tl); 2757 } 2758 mp = mp2 = mb; 2759 bp = bpos; 2760 be = bp + M_TRAILINGSPACE(mp); 2761 2762 /* Loop through the records and build reply */ 2763 while (cpos < cend && ncookies > 0) { 2764 if (dp->d_fileno != 0 && dp->d_type != DT_WHT) { 2765 nlen = dp->d_namlen; 2766 rem = nfsm_rndup(nlen)-nlen; 2767 len += (4 * NFSX_UNSIGNED + nlen + rem); 2768 if (v3) 2769 len += 2 * NFSX_UNSIGNED; 2770 if (len > cnt) { 2771 eofflag = 0; 2772 break; 2773 } 2774 /* 2775 * Build the directory record xdr from 2776 * the dirent entry. 2777 */ 2778 nfsm_clget; 2779 *tl = nfs_true; 2780 bp += NFSX_UNSIGNED; 2781 if (v3) { 2782 nfsm_clget; 2783 *tl = txdr_unsigned(dp->d_fileno >> 32); 2784 bp += NFSX_UNSIGNED; 2785 } 2786 nfsm_clget; 2787 *tl = txdr_unsigned(dp->d_fileno); 2788 bp += NFSX_UNSIGNED; 2789 nfsm_clget; 2790 *tl = txdr_unsigned(nlen); 2791 bp += NFSX_UNSIGNED; 2792 2793 /* And loop around copying the name */ 2794 xfer = nlen; 2795 cp = dp->d_name; 2796 while (xfer > 0) { 2797 nfsm_clget; 2798 if ((bp+xfer) > be) 2799 tsiz = be-bp; 2800 else 2801 tsiz = xfer; 2802 memcpy(bp, cp, tsiz); 2803 bp += tsiz; 2804 xfer -= tsiz; 2805 if (xfer > 0) 2806 cp += tsiz; 2807 } 2808 /* And null pad to an int32_t boundary */ 2809 for (i = 0; i < rem; i++) 2810 *bp++ = '\0'; 2811 nfsm_clget; 2812 2813 /* Finish off the record */ 2814 txdr_hyper(*cookiep, &jar); 2815 if (v3) { 2816 *tl = jar.nfsuquad[0]; 2817 bp += NFSX_UNSIGNED; 2818 nfsm_clget; 2819 } 2820 *tl = jar.nfsuquad[1]; 2821 bp += NFSX_UNSIGNED; 2822 } 2823 cpos += dp->d_reclen; 2824 dp = (struct dirent *)cpos; 2825 cookiep++; 2826 ncookies--; 2827 } 2828 vrele(vp); 2829 nfsm_clget; 2830 *tl = nfs_false; 2831 bp += NFSX_UNSIGNED; 2832 nfsm_clget; 2833 if (eofflag) 2834 *tl = nfs_true; 2835 else 2836 *tl = nfs_false; 2837 bp += NFSX_UNSIGNED; 2838 if (mp != mb) { 2839 if (bp < be) 2840 mp->m_len = bp - mtod(mp, caddr_t); 2841 } else 2842 mp->m_len += bp - bpos; 2843 free((caddr_t)rbuf, M_TEMP); 2844 free((caddr_t)cookies, M_TEMP); 2845 nfsm_srvdone; 2846 } 2847 2848 int 2849 nfsrv_readdirplus(nfsd, slp, lwp, mrq) 2850 struct nfsrv_descript *nfsd; 2851 struct nfssvc_sock *slp; 2852 struct lwp *lwp; 2853 struct mbuf **mrq; 2854 { 2855 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2856 struct mbuf *nam = nfsd->nd_nam; 2857 caddr_t dpos = nfsd->nd_dpos; 2858 kauth_cred_t cred = nfsd->nd_cr; 2859 char *bp, *be; 2860 struct mbuf *mp; 2861 struct dirent *dp; 2862 caddr_t cp; 2863 u_int32_t *tl; 2864 int32_t t1; 2865 caddr_t bpos; 2866 struct mbuf *mb, *mreq, *mp2; 2867 char *cpos, *cend, *cp2, *rbuf; 2868 struct vnode *vp, *nvp; 2869 struct flrep fl; 2870 nfsfh_t nfh; 2871 fhandle_t *fhp, *nfhp = (fhandle_t *)fl.fl_nfh; 2872 struct uio io; 2873 struct iovec iv; 2874 struct vattr va, at, *vap = &va; 2875 struct nfs_fattr *fp; 2876 int len, nlen, rem, xfer, tsiz, i, error = 0, getret = 1; 2877 int siz, cnt, fullsiz, eofflag, rdonly, cache, dirlen, ncookies; 2878 u_quad_t frev, off, toff, verf; 2879 off_t *cookies = NULL, *cookiep; 2880 2881 fhp = &nfh.fh_generic; 2882 nfsm_srvmtofh(fhp); 2883 nfsm_dissect(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 2884 toff = fxdr_hyper(tl); 2885 tl += 2; 2886 verf = fxdr_hyper(tl); 2887 tl += 2; 2888 siz = fxdr_unsigned(int, *tl++); 2889 cnt = fxdr_unsigned(int, *tl); 2890 off = toff; 2891 siz = ((siz + NFS_SRVDIRBLKSIZ - 1) & ~(NFS_SRVDIRBLKSIZ - 1)); 2892 xfer = NFS_SRVMAXDATA(nfsd); 2893 if (siz > xfer) 2894 siz = xfer; 2895 fullsiz = siz; 2896 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 2897 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2898 if (!error && vp->v_type != VDIR) { 2899 error = ENOTDIR; 2900 vput(vp); 2901 } 2902 if (error) { 2903 nfsm_reply(NFSX_UNSIGNED); 2904 nfsm_srvpostop_attr(getret, &at); 2905 return (0); 2906 } 2907 error = getret = VOP_GETATTR(vp, &at, cred, lwp); 2908 #ifdef NFS3_STRICTVERF 2909 /* 2910 * XXX This check is too strict for Solaris 2.5 clients. 2911 */ 2912 if (!error && toff && verf != at.va_filerev) 2913 error = NFSERR_BAD_COOKIE; 2914 #endif 2915 if (!error) { 2916 nqsrv_getl(vp, ND_READ); 2917 error = nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 0); 2918 } 2919 if (error) { 2920 vput(vp); 2921 nfsm_reply(NFSX_V3POSTOPATTR); 2922 nfsm_srvpostop_attr(getret, &at); 2923 return (0); 2924 } 2925 VOP_UNLOCK(vp, 0); 2926 2927 rbuf = malloc(siz, M_TEMP, M_WAITOK); 2928 again: 2929 iv.iov_base = rbuf; 2930 iv.iov_len = fullsiz; 2931 io.uio_iov = &iv; 2932 io.uio_iovcnt = 1; 2933 io.uio_offset = (off_t)off; 2934 io.uio_resid = fullsiz; 2935 io.uio_rw = UIO_READ; 2936 UIO_SETUP_SYSSPACE(&io); 2937 eofflag = 0; 2938 2939 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2940 2941 error = VOP_READDIR(vp, &io, cred, &eofflag, &cookies, &ncookies); 2942 2943 off = (u_quad_t)io.uio_offset; 2944 getret = VOP_GETATTR(vp, &at, cred, lwp); 2945 2946 VOP_UNLOCK(vp, 0); 2947 2948 /* 2949 * If the VGET operation doesn't work for this filesystem, 2950 * we can't support readdirplus. Returning NOTSUPP should 2951 * make clients fall back to plain readdir. 2952 * There's no need to check for VPTOFH as well, we wouldn't 2953 * even be here otherwise. 2954 */ 2955 if (!getret) { 2956 if ((getret = VFS_VGET(vp->v_mount, at.va_fileid, &nvp))) 2957 getret = (getret == EOPNOTSUPP) ? 2958 NFSERR_NOTSUPP : NFSERR_IO; 2959 else 2960 vput(nvp); 2961 } 2962 2963 if (!cookies && !error) 2964 error = NFSERR_PERM; 2965 if (!error) 2966 error = getret; 2967 if (error) { 2968 vrele(vp); 2969 if (cookies) 2970 free((caddr_t)cookies, M_TEMP); 2971 free((caddr_t)rbuf, M_TEMP); 2972 nfsm_reply(NFSX_V3POSTOPATTR); 2973 nfsm_srvpostop_attr(getret, &at); 2974 return (0); 2975 } 2976 if (io.uio_resid) { 2977 siz -= io.uio_resid; 2978 2979 /* 2980 * If nothing read, return eof 2981 * rpc reply 2982 */ 2983 if (siz == 0) { 2984 vrele(vp); 2985 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF + 2986 2 * NFSX_UNSIGNED); 2987 nfsm_srvpostop_attr(getret, &at); 2988 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 2989 txdr_hyper(at.va_filerev, tl); 2990 tl += 2; 2991 *tl++ = nfs_false; 2992 *tl = nfs_true; 2993 free((caddr_t)cookies, M_TEMP); 2994 free((caddr_t)rbuf, M_TEMP); 2995 return (0); 2996 } 2997 } 2998 2999 /* 3000 * Check for degenerate cases of nothing useful read. 3001 * If so go try again 3002 */ 3003 cpos = rbuf; 3004 cend = rbuf + siz; 3005 dp = (struct dirent *)cpos; 3006 cookiep = cookies; 3007 3008 while (cpos < cend && ncookies > 0 && 3009 (dp->d_fileno == 0 || dp->d_type == DT_WHT)) { 3010 cpos += dp->d_reclen; 3011 dp = (struct dirent *)cpos; 3012 cookiep++; 3013 ncookies--; 3014 } 3015 if (cpos >= cend || ncookies == 0) { 3016 toff = off; 3017 siz = fullsiz; 3018 goto again; 3019 } 3020 3021 dirlen = len = NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF + 2 * NFSX_UNSIGNED; 3022 nfsm_reply(cnt); 3023 nfsm_srvpostop_attr(getret, &at); 3024 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 3025 txdr_hyper(at.va_filerev, tl); 3026 mp = mp2 = mb; 3027 bp = bpos; 3028 be = bp + M_TRAILINGSPACE(mp); 3029 3030 /* Loop through the records and build reply */ 3031 while (cpos < cend && ncookies > 0) { 3032 if (dp->d_fileno != 0 && dp->d_type != DT_WHT) { 3033 nlen = dp->d_namlen; 3034 rem = nfsm_rndup(nlen)-nlen; 3035 3036 /* 3037 * For readdir_and_lookup get the vnode using 3038 * the file number. 3039 */ 3040 if (VFS_VGET(vp->v_mount, dp->d_fileno, &nvp)) 3041 goto invalid; 3042 memset((caddr_t)nfhp, 0, NFSX_V3FH); 3043 nfhp->fh_fsid = 3044 nvp->v_mount->mnt_stat.f_fsidx; 3045 if (VFS_VPTOFH(nvp, &nfhp->fh_fid)) { 3046 vput(nvp); 3047 goto invalid; 3048 } 3049 if (VOP_GETATTR(nvp, vap, cred, lwp)) { 3050 vput(nvp); 3051 goto invalid; 3052 } 3053 vput(nvp); 3054 3055 /* 3056 * If either the dircount or maxcount will be 3057 * exceeded, get out now. Both of these lengths 3058 * are calculated conservatively, including all 3059 * XDR overheads. 3060 */ 3061 len += (8 * NFSX_UNSIGNED + nlen + rem + NFSX_V3FH + 3062 NFSX_V3POSTOPATTR); 3063 dirlen += (6 * NFSX_UNSIGNED + nlen + rem); 3064 if (len > cnt || dirlen > fullsiz) { 3065 eofflag = 0; 3066 break; 3067 } 3068 3069 /* 3070 * Build the directory record xdr from 3071 * the dirent entry. 3072 */ 3073 fp = (struct nfs_fattr *)&fl.fl_fattr; 3074 nfsm_srvfillattr(vap, fp); 3075 fl.fl_fhsize = txdr_unsigned(NFSX_V3FH); 3076 fl.fl_fhok = nfs_true; 3077 fl.fl_postopok = nfs_true; 3078 txdr_hyper(*cookiep, fl.fl_off.nfsuquad); 3079 3080 nfsm_clget; 3081 *tl = nfs_true; 3082 bp += NFSX_UNSIGNED; 3083 nfsm_clget; 3084 *tl = txdr_unsigned(dp->d_fileno >> 32); 3085 bp += NFSX_UNSIGNED; 3086 nfsm_clget; 3087 *tl = txdr_unsigned(dp->d_fileno); 3088 bp += NFSX_UNSIGNED; 3089 nfsm_clget; 3090 *tl = txdr_unsigned(nlen); 3091 bp += NFSX_UNSIGNED; 3092 3093 /* And loop around copying the name */ 3094 xfer = nlen; 3095 cp = dp->d_name; 3096 while (xfer > 0) { 3097 nfsm_clget; 3098 if ((bp + xfer) > be) 3099 tsiz = be - bp; 3100 else 3101 tsiz = xfer; 3102 memcpy(bp, cp, tsiz); 3103 bp += tsiz; 3104 xfer -= tsiz; 3105 if (xfer > 0) 3106 cp += tsiz; 3107 } 3108 /* And null pad to an int32_t boundary */ 3109 for (i = 0; i < rem; i++) 3110 *bp++ = '\0'; 3111 3112 /* 3113 * Now copy the flrep structure out. 3114 */ 3115 xfer = sizeof (struct flrep); 3116 cp = (caddr_t)&fl; 3117 while (xfer > 0) { 3118 nfsm_clget; 3119 if ((bp + xfer) > be) 3120 tsiz = be - bp; 3121 else 3122 tsiz = xfer; 3123 memcpy(bp, cp, tsiz); 3124 bp += tsiz; 3125 xfer -= tsiz; 3126 if (xfer > 0) 3127 cp += tsiz; 3128 } 3129 } 3130 invalid: 3131 cpos += dp->d_reclen; 3132 dp = (struct dirent *)cpos; 3133 cookiep++; 3134 ncookies--; 3135 } 3136 vrele(vp); 3137 nfsm_clget; 3138 *tl = nfs_false; 3139 bp += NFSX_UNSIGNED; 3140 nfsm_clget; 3141 if (eofflag) 3142 *tl = nfs_true; 3143 else 3144 *tl = nfs_false; 3145 bp += NFSX_UNSIGNED; 3146 if (mp != mb) { 3147 if (bp < be) 3148 mp->m_len = bp - mtod(mp, caddr_t); 3149 } else 3150 mp->m_len += bp - bpos; 3151 free((caddr_t)cookies, M_TEMP); 3152 free((caddr_t)rbuf, M_TEMP); 3153 nfsm_srvdone; 3154 } 3155 3156 /* 3157 * nfs commit service 3158 */ 3159 int 3160 nfsrv_commit(nfsd, slp, lwp, mrq) 3161 struct nfsrv_descript *nfsd; 3162 struct nfssvc_sock *slp; 3163 struct lwp *lwp; 3164 struct mbuf **mrq; 3165 { 3166 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3167 struct mbuf *nam = nfsd->nd_nam; 3168 caddr_t dpos = nfsd->nd_dpos; 3169 kauth_cred_t cred = nfsd->nd_cr; 3170 struct vattr bfor, aft; 3171 struct vnode *vp; 3172 nfsfh_t nfh; 3173 fhandle_t *fhp; 3174 u_int32_t *tl; 3175 int32_t t1; 3176 caddr_t bpos; 3177 int error = 0, rdonly, for_ret = 1, aft_ret = 1, cache; 3178 uint32_t cnt; 3179 char *cp2; 3180 struct mbuf *mb, *mreq; 3181 u_quad_t frev, off, end; 3182 struct mount *mp = NULL; 3183 3184 #ifndef nolint 3185 cache = 0; 3186 #endif 3187 fhp = &nfh.fh_generic; 3188 nfsm_srvmtofh(fhp); 3189 if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) 3190 return (ESTALE); 3191 vn_start_write(NULL, &mp, V_WAIT); 3192 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 3193 3194 off = fxdr_hyper(tl); 3195 tl += 2; 3196 cnt = fxdr_unsigned(uint32_t, *tl); 3197 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 3198 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 3199 if (error) { 3200 nfsm_reply(2 * NFSX_UNSIGNED); 3201 nfsm_srvwcc_data(for_ret, &bfor, aft_ret, &aft); 3202 vn_finished_write(mp, 0); 3203 return (0); 3204 } 3205 for_ret = VOP_GETATTR(vp, &bfor, cred, lwp); 3206 end = (cnt > 0) ? off + cnt : vp->v_size; 3207 if (end < off || end > vp->v_size) 3208 end = vp->v_size; 3209 if (off < vp->v_size) 3210 error = VOP_FSYNC(vp, cred, FSYNC_WAIT, off, end, lwp); 3211 /* else error == 0, from nfsrv_fhtovp() */ 3212 aft_ret = VOP_GETATTR(vp, &aft, cred, lwp); 3213 vput(vp); 3214 nfsm_reply(NFSX_V3WCCDATA + NFSX_V3WRITEVERF); 3215 nfsm_srvwcc_data(for_ret, &bfor, aft_ret, &aft); 3216 if (!error) { 3217 nfsm_build(tl, u_int32_t *, NFSX_V3WRITEVERF); 3218 *tl++ = txdr_unsigned(boottime.tv_sec); 3219 *tl = txdr_unsigned(boottime.tv_usec); 3220 } else { 3221 vn_finished_write(mp, 0); 3222 return (0); 3223 } 3224 vn_finished_write(mp, 0); 3225 nfsm_srvdone; 3226 } 3227 3228 /* 3229 * nfs statfs service 3230 */ 3231 int 3232 nfsrv_statfs(nfsd, slp, lwp, mrq) 3233 struct nfsrv_descript *nfsd; 3234 struct nfssvc_sock *slp; 3235 struct lwp *lwp; 3236 struct mbuf **mrq; 3237 { 3238 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3239 struct mbuf *nam = nfsd->nd_nam; 3240 caddr_t dpos = nfsd->nd_dpos; 3241 kauth_cred_t cred = nfsd->nd_cr; 3242 struct statvfs *sf; 3243 struct nfs_statfs *sfp; 3244 u_int32_t *tl; 3245 int32_t t1; 3246 caddr_t bpos; 3247 int error = 0, rdonly, cache, getret = 1; 3248 int v3 = (nfsd->nd_flag & ND_NFSV3); 3249 char *cp2; 3250 struct mbuf *mb, *mreq; 3251 struct vnode *vp; 3252 struct vattr at; 3253 nfsfh_t nfh; 3254 fhandle_t *fhp; 3255 struct statvfs statvfs; 3256 u_quad_t frev, tval; 3257 3258 #ifndef nolint 3259 cache = 0; 3260 #endif 3261 fhp = &nfh.fh_generic; 3262 nfsm_srvmtofh(fhp); 3263 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 3264 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 3265 if (error) { 3266 nfsm_reply(NFSX_UNSIGNED); 3267 nfsm_srvpostop_attr(getret, &at); 3268 return (0); 3269 } 3270 sf = &statvfs; 3271 error = VFS_STATVFS(vp->v_mount, sf, lwp); 3272 getret = VOP_GETATTR(vp, &at, cred, lwp); 3273 vput(vp); 3274 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_STATFS(v3)); 3275 if (v3) 3276 nfsm_srvpostop_attr(getret, &at); 3277 if (error) 3278 return (0); 3279 nfsm_build(sfp, struct nfs_statfs *, NFSX_STATFS(v3)); 3280 if (v3) { 3281 tval = (u_quad_t)((quad_t)sf->f_blocks * (quad_t)sf->f_frsize); 3282 txdr_hyper(tval, &sfp->sf_tbytes); 3283 tval = (u_quad_t)((quad_t)sf->f_bfree * (quad_t)sf->f_frsize); 3284 txdr_hyper(tval, &sfp->sf_fbytes); 3285 tval = (u_quad_t)((quad_t)sf->f_bavail * (quad_t)sf->f_frsize); 3286 txdr_hyper(tval, &sfp->sf_abytes); 3287 tval = (u_quad_t)sf->f_files; 3288 txdr_hyper(tval, &sfp->sf_tfiles); 3289 tval = (u_quad_t)sf->f_ffree; 3290 txdr_hyper(tval, &sfp->sf_ffiles); 3291 txdr_hyper(tval, &sfp->sf_afiles); 3292 sfp->sf_invarsec = 0; 3293 } else { 3294 sfp->sf_tsize = txdr_unsigned(NFS_MAXDGRAMDATA); 3295 sfp->sf_bsize = txdr_unsigned(sf->f_frsize); 3296 sfp->sf_blocks = txdr_unsigned(sf->f_blocks); 3297 sfp->sf_bfree = txdr_unsigned(sf->f_bfree); 3298 sfp->sf_bavail = txdr_unsigned(sf->f_bavail); 3299 } 3300 nfsm_srvdone; 3301 } 3302 3303 /* 3304 * nfs fsinfo service 3305 */ 3306 int 3307 nfsrv_fsinfo(nfsd, slp, lwp, mrq) 3308 struct nfsrv_descript *nfsd; 3309 struct nfssvc_sock *slp; 3310 struct lwp *lwp; 3311 struct mbuf **mrq; 3312 { 3313 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3314 struct mbuf *nam = nfsd->nd_nam; 3315 caddr_t dpos = nfsd->nd_dpos; 3316 kauth_cred_t cred = nfsd->nd_cr; 3317 u_int32_t *tl; 3318 struct nfsv3_fsinfo *sip; 3319 int32_t t1; 3320 caddr_t bpos; 3321 int error = 0, rdonly, cache, getret = 1; 3322 uint32_t maxdata; 3323 char *cp2; 3324 struct mbuf *mb, *mreq; 3325 struct vnode *vp; 3326 struct vattr at; 3327 nfsfh_t nfh; 3328 fhandle_t *fhp; 3329 u_quad_t frev, maxfsize; 3330 struct statvfs sb; 3331 3332 #ifndef nolint 3333 cache = 0; 3334 #endif 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, 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 #ifndef nolint 3409 cache = 0; 3410 #endif 3411 fhp = &nfh.fh_generic; 3412 nfsm_srvmtofh(fhp); 3413 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 3414 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 3415 if (error) { 3416 nfsm_reply(NFSX_UNSIGNED); 3417 nfsm_srvpostop_attr(getret, &at); 3418 return (0); 3419 } 3420 error = VOP_PATHCONF(vp, _PC_LINK_MAX, &linkmax); 3421 if (!error) 3422 error = VOP_PATHCONF(vp, _PC_NAME_MAX, &namemax); 3423 if (!error) 3424 error = VOP_PATHCONF(vp, _PC_CHOWN_RESTRICTED, &chownres); 3425 if (!error) 3426 error = VOP_PATHCONF(vp, _PC_NO_TRUNC, ¬runc); 3427 getret = VOP_GETATTR(vp, &at, cred, lwp); 3428 vput(vp); 3429 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3PATHCONF); 3430 nfsm_srvpostop_attr(getret, &at); 3431 if (error) 3432 return (0); 3433 nfsm_build(pc, struct nfsv3_pathconf *, NFSX_V3PATHCONF); 3434 3435 pc->pc_linkmax = txdr_unsigned(linkmax); 3436 pc->pc_namemax = txdr_unsigned(namemax); 3437 pc->pc_notrunc = txdr_unsigned(notrunc); 3438 pc->pc_chownrestricted = txdr_unsigned(chownres); 3439 3440 /* 3441 * These should probably be supported by VOP_PATHCONF(), but 3442 * until msdosfs is exportable (why would you want to?), the 3443 * Unix defaults should be ok. 3444 */ 3445 pc->pc_caseinsensitive = nfs_false; 3446 pc->pc_casepreserving = nfs_true; 3447 nfsm_srvdone; 3448 } 3449 3450 /* 3451 * Null operation, used by clients to ping server 3452 */ 3453 /* ARGSUSED */ 3454 int 3455 nfsrv_null(nfsd, slp, lwp, mrq) 3456 struct nfsrv_descript *nfsd; 3457 struct nfssvc_sock *slp; 3458 struct lwp *lwp; 3459 struct mbuf **mrq; 3460 { 3461 struct mbuf *mrep = nfsd->nd_mrep; 3462 caddr_t bpos; 3463 int error = NFSERR_RETVOID, cache = 0; 3464 struct mbuf *mb, *mreq; 3465 u_quad_t frev; 3466 3467 nfsm_reply(0); 3468 return (0); 3469 } 3470 3471 /* 3472 * No operation, used for obsolete procedures 3473 */ 3474 /* ARGSUSED */ 3475 int 3476 nfsrv_noop(nfsd, slp, lwp, mrq) 3477 struct nfsrv_descript *nfsd; 3478 struct nfssvc_sock *slp; 3479 struct lwp *lwp; 3480 struct mbuf **mrq; 3481 { 3482 struct mbuf *mrep = nfsd->nd_mrep; 3483 caddr_t bpos; 3484 int error, cache = 0; 3485 struct mbuf *mb, *mreq; 3486 u_quad_t frev; 3487 3488 if (nfsd->nd_repstat) 3489 error = nfsd->nd_repstat; 3490 else 3491 error = EPROCUNAVAIL; 3492 nfsm_reply(0); 3493 return (0); 3494 } 3495 3496 /* 3497 * Perform access checking for vnodes obtained from file handles that would 3498 * refer to files already opened by a Unix client. You cannot just use 3499 * vn_writechk() and VOP_ACCESS() for two reasons. 3500 * 1 - You must check for exported rdonly as well as MNT_RDONLY for the write case 3501 * 2 - The owner is to be given access irrespective of mode bits for some 3502 * operations, so that processes that chmod after opening a file don't 3503 * break. I don't like this because it opens a security hole, but since 3504 * the nfs server opens a security hole the size of a barn door anyhow, 3505 * what the heck. 3506 * 3507 * The exception to rule 2 is EPERM. If a file is IMMUTABLE, VOP_ACCESS() 3508 * will return EPERM instead of EACCESS. EPERM is always an error. 3509 */ 3510 int 3511 nfsrv_access(vp, flags, cred, rdonly, lwp, override) 3512 struct vnode *vp; 3513 int flags; 3514 kauth_cred_t cred; 3515 int rdonly; 3516 struct lwp *lwp; 3517 { 3518 struct vattr vattr; 3519 int error; 3520 if (flags & VWRITE) { 3521 /* Just vn_writechk() changed to check rdonly */ 3522 /* 3523 * Disallow write attempts on read-only file systems; 3524 * unless the file is a socket or a block or character 3525 * device resident on the file system. 3526 */ 3527 if (rdonly || (vp->v_mount->mnt_flag & MNT_RDONLY)) { 3528 switch (vp->v_type) { 3529 case VREG: 3530 case VDIR: 3531 case VLNK: 3532 return (EROFS); 3533 default: 3534 break; 3535 } 3536 } 3537 3538 /* 3539 * If the vnode is in use as a process's text, 3540 * we can't allow writing. 3541 */ 3542 if (vp->v_flag & VTEXT) 3543 return (ETXTBSY); 3544 } 3545 error = VOP_GETATTR(vp, &vattr, cred, lwp); 3546 if (error) 3547 return (error); 3548 error = VOP_ACCESS(vp, flags, cred, lwp); 3549 /* 3550 * Allow certain operations for the owner (reads and writes 3551 * on files that are already open). 3552 */ 3553 if (override && error == EACCES && kauth_cred_geteuid(cred) == vattr.va_uid) 3554 error = 0; 3555 return error; 3556 } 3557
Indexes created Thu Oct 02 14:10:14 GMT 2025