nfs_serv.c revision 1.116
1 /* $NetBSD: nfs_serv.c,v 1.116 2006/09/02 07:26:47 christos 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 1.116 2006/09/02 07:26:47 christos Exp $"); 59 60 #include <sys/param.h> 61 #include <sys/systm.h> 62 #include <sys/proc.h> 63 #include <sys/file.h> 64 #include <sys/namei.h> 65 #include <sys/vnode.h> 66 #include <sys/mount.h> 67 #include <sys/socket.h> 68 #include <sys/socketvar.h> 69 #include <sys/mbuf.h> 70 #include <sys/dirent.h> 71 #include <sys/stat.h> 72 #include <sys/kernel.h> 73 #include <sys/kauth.h> 74 75 #include <uvm/uvm.h> 76 77 #include <nfs/nfsproto.h> 78 #include <nfs/rpcv2.h> 79 #include <nfs/nfs.h> 80 #include <nfs/xdr_subs.h> 81 #include <nfs/nfsm_subs.h> 82 #include <nfs/nqnfs.h> 83 #include <nfs/nfs_var.h> 84 85 /* Global vars */ 86 extern u_int32_t nfs_xdrneg1; 87 extern u_int32_t nfs_false, nfs_true; 88 extern enum vtype nv3tov_type[8]; 89 extern struct nfsstats nfsstats; 90 extern const nfstype nfsv2_type[9]; 91 extern const nfstype nfsv3_type[9]; 92 int nfsrvw_procrastinate = NFS_GATHERDELAY * 1000; 93 int nfsd_use_loan = 1; /* use page-loan for READ OP */ 94 95 /* 96 * nfs v3 access service 97 */ 98 int 99 nfsrv3_access(nfsd, slp, lwp, mrq) 100 struct nfsrv_descript *nfsd; 101 struct nfssvc_sock *slp; 102 struct lwp *lwp; 103 struct mbuf **mrq; 104 { 105 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 106 struct mbuf *nam = nfsd->nd_nam; 107 caddr_t dpos = nfsd->nd_dpos; 108 kauth_cred_t cred = nfsd->nd_cr; 109 struct vnode *vp; 110 nfsfh_t nfh; 111 fhandle_t *fhp; 112 u_int32_t *tl; 113 int32_t t1; 114 caddr_t bpos; 115 int error = 0, rdonly, cache = 0, getret; 116 char *cp2; 117 struct mbuf *mb, *mreq; 118 struct vattr va; 119 u_long inmode, testmode, outmode; 120 u_quad_t frev; 121 122 fhp = &nfh.fh_generic; 123 nfsm_srvmtofh(fhp); 124 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 125 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, &rdonly, 126 (nfsd->nd_flag & ND_KERBAUTH), FALSE); 127 if (error) { 128 nfsm_reply(NFSX_UNSIGNED); 129 nfsm_srvpostop_attr(1, (struct vattr *)0); 130 return (0); 131 } 132 inmode = fxdr_unsigned(u_int32_t, *tl); 133 outmode = 0; 134 if ((inmode & NFSV3ACCESS_READ) && 135 nfsrv_access(vp, VREAD, cred, rdonly, lwp, 0) == 0) 136 outmode |= NFSV3ACCESS_READ; 137 if (vp->v_type != VDIR) { 138 testmode = inmode & (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND); 139 if (testmode && 140 nfsrv_access(vp, VWRITE, cred, rdonly, lwp, 0) == 0) 141 outmode |= testmode; 142 if ((inmode & NFSV3ACCESS_EXECUTE) && 143 nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 0) == 0) 144 outmode |= NFSV3ACCESS_EXECUTE; 145 } else { 146 testmode = inmode & (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | 147 NFSV3ACCESS_DELETE); 148 if (testmode && 149 nfsrv_access(vp, VWRITE, cred, rdonly, lwp, 0) == 0) 150 outmode |= testmode; 151 if ((inmode & NFSV3ACCESS_LOOKUP) && 152 nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 0) == 0) 153 outmode |= NFSV3ACCESS_LOOKUP; 154 } 155 getret = VOP_GETATTR(vp, &va, cred, lwp); 156 vput(vp); 157 nfsm_reply(NFSX_POSTOPATTR(1) + NFSX_UNSIGNED); 158 nfsm_srvpostop_attr(getret, &va); 159 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 160 *tl = txdr_unsigned(outmode); 161 nfsm_srvdone; 162 } 163 164 /* 165 * nfs getattr service 166 */ 167 int 168 nfsrv_getattr(nfsd, slp, lwp, mrq) 169 struct nfsrv_descript *nfsd; 170 struct nfssvc_sock *slp; 171 struct lwp *lwp; 172 struct mbuf **mrq; 173 { 174 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 175 struct mbuf *nam = nfsd->nd_nam; 176 caddr_t dpos = nfsd->nd_dpos; 177 kauth_cred_t cred = nfsd->nd_cr; 178 struct nfs_fattr *fp; 179 struct vattr va; 180 struct vnode *vp; 181 nfsfh_t nfh; 182 fhandle_t *fhp; 183 u_int32_t *tl; 184 int32_t t1; 185 caddr_t bpos; 186 int error = 0, rdonly, cache = 0; 187 char *cp2; 188 struct mbuf *mb, *mreq; 189 u_quad_t frev; 190 191 fhp = &nfh.fh_generic; 192 nfsm_srvmtofh(fhp); 193 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, &rdonly, 194 (nfsd->nd_flag & ND_KERBAUTH), FALSE); 195 if (error) { 196 nfsm_reply(0); 197 return (0); 198 } 199 nqsrv_getl(vp, ND_READ); 200 error = VOP_GETATTR(vp, &va, cred, lwp); 201 vput(vp); 202 nfsm_reply(NFSX_FATTR(nfsd->nd_flag & ND_NFSV3)); 203 if (error) 204 return (0); 205 nfsm_build(fp, struct nfs_fattr *, NFSX_FATTR(nfsd->nd_flag & ND_NFSV3)); 206 nfsm_srvfillattr(&va, fp); 207 nfsm_srvdone; 208 } 209 210 /* 211 * nfs setattr service 212 */ 213 int 214 nfsrv_setattr(nfsd, slp, lwp, mrq) 215 struct nfsrv_descript *nfsd; 216 struct nfssvc_sock *slp; 217 struct lwp *lwp; 218 struct mbuf **mrq; 219 { 220 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 221 struct mbuf *nam = nfsd->nd_nam; 222 caddr_t dpos = nfsd->nd_dpos; 223 kauth_cred_t cred = nfsd->nd_cr; 224 struct vattr va, preat; 225 struct nfsv2_sattr *sp; 226 struct nfs_fattr *fp; 227 struct vnode *vp; 228 nfsfh_t nfh; 229 fhandle_t *fhp; 230 u_int32_t *tl; 231 int32_t t1; 232 caddr_t bpos; 233 int error = 0, rdonly, cache = 0, preat_ret = 1, postat_ret = 1; 234 int v3 = (nfsd->nd_flag & ND_NFSV3), gcheck = 0; 235 char *cp2; 236 struct mbuf *mb, *mreq; 237 u_quad_t frev; 238 struct timespec guard; 239 struct mount *mp = NULL; 240 241 memset(&guard, 0, sizeof guard); /* XXX gcc */ 242 243 fhp = &nfh.fh_generic; 244 nfsm_srvmtofh(fhp); 245 if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) 246 return (ESTALE); 247 vn_start_write(NULL, &mp, V_WAIT); 248 VATTR_NULL(&va); 249 if (v3) { 250 nfsm_srvsattr(&va); 251 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 252 gcheck = fxdr_unsigned(int, *tl); 253 if (gcheck) { 254 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 255 fxdr_nfsv3time(tl, &guard); 256 } 257 } else { 258 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 259 /* 260 * Nah nah nah nah na nah 261 * There is a bug in the Sun client that puts 0xffff in the mode 262 * field of sattr when it should put in 0xffffffff. The u_short 263 * doesn't sign extend. 264 * --> check the low order 2 bytes for 0xffff 265 */ 266 if ((fxdr_unsigned(int, sp->sa_mode) & 0xffff) != 0xffff) 267 va.va_mode = nfstov_mode(sp->sa_mode); 268 if (sp->sa_uid != nfs_xdrneg1) 269 va.va_uid = fxdr_unsigned(uid_t, sp->sa_uid); 270 if (sp->sa_gid != nfs_xdrneg1) 271 va.va_gid = fxdr_unsigned(gid_t, sp->sa_gid); 272 if (sp->sa_size != nfs_xdrneg1) 273 va.va_size = fxdr_unsigned(u_quad_t, sp->sa_size); 274 if (sp->sa_atime.nfsv2_sec != nfs_xdrneg1) { 275 #ifdef notyet 276 fxdr_nfsv2time(&sp->sa_atime, &va.va_atime); 277 #else 278 va.va_atime.tv_sec = 279 fxdr_unsigned(u_int32_t,sp->sa_atime.nfsv2_sec); 280 va.va_atime.tv_nsec = 0; 281 #endif 282 } 283 if (sp->sa_mtime.nfsv2_sec != nfs_xdrneg1) 284 fxdr_nfsv2time(&sp->sa_mtime, &va.va_mtime); 285 286 } 287 288 /* 289 * Now that we have all the fields, lets do it. 290 */ 291 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, &rdonly, 292 (nfsd->nd_flag & ND_KERBAUTH), FALSE); 293 if (error) { 294 nfsm_reply(2 * NFSX_UNSIGNED); 295 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 296 vn_finished_write(mp, 0); 297 return (0); 298 } 299 nqsrv_getl(vp, ND_WRITE); 300 if (v3) { 301 error = preat_ret = VOP_GETATTR(vp, &preat, cred, lwp); 302 if (!error && gcheck && 303 (preat.va_ctime.tv_sec != guard.tv_sec || 304 preat.va_ctime.tv_nsec != guard.tv_nsec)) 305 error = NFSERR_NOT_SYNC; 306 if (error) { 307 vput(vp); 308 nfsm_reply(NFSX_WCCDATA(v3)); 309 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 310 vn_finished_write(mp, 0); 311 return (0); 312 } 313 } 314 315 /* 316 * If the size is being changed write acces is required, otherwise 317 * just check for a read only file system. 318 */ 319 if (va.va_size == ((u_quad_t)((quad_t) -1))) { 320 if (rdonly || (vp->v_mount->mnt_flag & MNT_RDONLY)) { 321 error = EROFS; 322 goto out; 323 } 324 } else { 325 if (vp->v_type == VDIR) { 326 error = EISDIR; 327 goto out; 328 } else if ((error = nfsrv_access(vp, VWRITE, cred, rdonly, 329 lwp, 0)) != 0) 330 goto out; 331 } 332 error = VOP_SETATTR(vp, &va, cred, lwp); 333 postat_ret = VOP_GETATTR(vp, &va, cred, lwp); 334 if (!error) 335 error = postat_ret; 336 out: 337 vput(vp); 338 vn_finished_write(mp, 0); 339 nfsm_reply(NFSX_WCCORFATTR(v3)); 340 if (v3) { 341 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 342 return (0); 343 } else { 344 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 345 nfsm_srvfillattr(&va, fp); 346 } 347 nfsm_srvdone; 348 } 349 350 /* 351 * nfs lookup rpc 352 */ 353 int 354 nfsrv_lookup(nfsd, slp, lwp, mrq) 355 struct nfsrv_descript *nfsd; 356 struct nfssvc_sock *slp; 357 struct lwp *lwp; 358 struct mbuf **mrq; 359 { 360 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 361 struct mbuf *nam = nfsd->nd_nam; 362 caddr_t dpos = nfsd->nd_dpos; 363 kauth_cred_t cred = nfsd->nd_cr; 364 struct nfs_fattr *fp; 365 struct nameidata nd, ind, *ndp = &nd; 366 struct vnode *vp, *dirp; 367 nfsfh_t nfh; 368 fhandle_t *fhp; 369 caddr_t cp; 370 u_int32_t *tl; 371 int32_t t1; 372 caddr_t bpos; 373 int error = 0, cache = 0, dirattr_ret = 1; 374 uint32_t len; 375 int v3 = (nfsd->nd_flag & ND_NFSV3), pubflag; 376 char *cp2; 377 struct mbuf *mb, *mreq; 378 struct vattr va, dirattr; 379 u_quad_t frev; 380 size_t fh_size; 381 382 fhp = &nfh.fh_generic; 383 fh_size = NFS_SMALLFH; 384 nfsm_srvmtofh(fhp); 385 nfsm_srvnamesiz(len); 386 387 pubflag = nfs_ispublicfh(fhp); 388 389 nd.ni_cnd.cn_cred = cred; 390 nd.ni_cnd.cn_nameiop = LOOKUP; 391 nd.ni_cnd.cn_flags = LOCKLEAF | SAVESTART; 392 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 393 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), pubflag); 394 395 if (!error && pubflag) { 396 if (nd.ni_vp->v_type == VDIR && nfs_pub.np_index != NULL) { 397 /* 398 * Setup call to lookup() to see if we can find 399 * the index file. Arguably, this doesn't belong 400 * in a kernel.. Ugh. 401 */ 402 ind = nd; 403 VOP_UNLOCK(nd.ni_vp, 0); 404 ind.ni_pathlen = strlen(nfs_pub.np_index); 405 ind.ni_cnd.cn_nameptr = ind.ni_cnd.cn_pnbuf = 406 nfs_pub.np_index; 407 ind.ni_startdir = nd.ni_vp; 408 VREF(ind.ni_startdir); 409 error = lookup(&ind); 410 if (!error) { 411 /* 412 * Found an index file. Get rid of 413 * the old references. 414 */ 415 if (dirp) 416 vrele(dirp); 417 dirp = nd.ni_vp; 418 vrele(nd.ni_startdir); 419 ndp = &ind; 420 } else 421 error = 0; 422 } 423 /* 424 * If the public filehandle was used, check that this lookup 425 * didn't result in a filehandle outside the publicly exported 426 * filesystem. 427 */ 428 429 if (!error && ndp->ni_vp->v_mount != nfs_pub.np_mount) { 430 vput(nd.ni_vp); 431 error = EPERM; 432 } 433 } 434 435 if (dirp) { 436 if (v3) 437 dirattr_ret = VOP_GETATTR(dirp, &dirattr, cred, lwp); 438 vrele(dirp); 439 } 440 441 if (error) { 442 nfsm_reply(NFSX_POSTOPATTR(v3)); 443 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 444 return (0); 445 } 446 447 nqsrv_getl(ndp->ni_startdir, ND_READ); 448 vrele(ndp->ni_startdir); 449 PNBUF_PUT(nd.ni_cnd.cn_pnbuf); 450 vp = ndp->ni_vp; 451 error = vfs_composefh(vp, fhp, &fh_size); 452 if (!error) 453 error = VOP_GETATTR(vp, &va, cred, lwp); 454 vput(vp); 455 nfsm_reply(NFSX_SRVFH(v3) + NFSX_POSTOPORFATTR(v3) + NFSX_POSTOPATTR(v3)); 456 if (error) { 457 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 458 return (0); 459 } 460 nfsm_srvfhtom(fhp, v3); 461 if (v3) { 462 nfsm_srvpostop_attr(0, &va); 463 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 464 } else { 465 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 466 nfsm_srvfillattr(&va, fp); 467 } 468 nfsm_srvdone; 469 } 470 471 /* 472 * nfs readlink service 473 */ 474 int 475 nfsrv_readlink(nfsd, slp, lwp, mrq) 476 struct nfsrv_descript *nfsd; 477 struct nfssvc_sock *slp; 478 struct lwp *lwp; 479 struct mbuf **mrq; 480 { 481 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 482 struct mbuf *nam = nfsd->nd_nam; 483 caddr_t dpos = nfsd->nd_dpos; 484 kauth_cred_t cred = nfsd->nd_cr; 485 struct iovec iv[(NFS_MAXPATHLEN+MLEN-1)/MLEN]; 486 struct iovec *ivp = iv; 487 struct mbuf *mp; 488 u_int32_t *tl; 489 int32_t t1; 490 caddr_t bpos; 491 int error = 0, rdonly, cache = 0, i, padlen, getret; 492 uint32_t len; 493 int v3 = (nfsd->nd_flag & ND_NFSV3); 494 char *cp2; 495 struct mbuf *mb, *mp2 = NULL, *mp3 = NULL, *mreq; 496 struct vnode *vp; 497 struct vattr attr; 498 nfsfh_t nfh; 499 fhandle_t *fhp; 500 struct uio io, *uiop = &io; 501 u_quad_t frev; 502 503 fhp = &nfh.fh_generic; 504 nfsm_srvmtofh(fhp); 505 len = 0; 506 i = 0; 507 while (len < NFS_MAXPATHLEN) { 508 mp = m_get(M_WAIT, MT_DATA); 509 MCLAIM(mp, &nfs_mowner); 510 m_clget(mp, M_WAIT); 511 mp->m_len = NFSMSIZ(mp); 512 if (len == 0) 513 mp3 = mp2 = mp; 514 else { 515 mp2->m_next = mp; 516 mp2 = mp; 517 } 518 if ((len+mp->m_len) > NFS_MAXPATHLEN) { 519 mp->m_len = NFS_MAXPATHLEN-len; 520 len = NFS_MAXPATHLEN; 521 } else 522 len += mp->m_len; 523 ivp->iov_base = mtod(mp, caddr_t); 524 ivp->iov_len = mp->m_len; 525 i++; 526 ivp++; 527 } 528 uiop->uio_iov = iv; 529 uiop->uio_iovcnt = i; 530 uiop->uio_offset = 0; 531 uiop->uio_resid = len; 532 uiop->uio_rw = UIO_READ; 533 UIO_SETUP_SYSSPACE(uiop); 534 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 535 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 536 if (error) { 537 m_freem(mp3); 538 nfsm_reply(2 * NFSX_UNSIGNED); 539 nfsm_srvpostop_attr(1, (struct vattr *)0); 540 return (0); 541 } 542 if (vp->v_type != VLNK) { 543 if (v3) 544 error = EINVAL; 545 else 546 error = ENXIO; 547 goto out; 548 } 549 nqsrv_getl(vp, ND_READ); 550 error = VOP_READLINK(vp, uiop, cred); 551 out: 552 getret = VOP_GETATTR(vp, &attr, cred, lwp); 553 vput(vp); 554 if (error) 555 m_freem(mp3); 556 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_UNSIGNED); 557 if (v3) { 558 nfsm_srvpostop_attr(getret, &attr); 559 if (error) 560 return (0); 561 } 562 len -= uiop->uio_resid; 563 padlen = nfsm_padlen(len); 564 if (uiop->uio_resid || padlen) 565 nfs_zeropad(mp3, uiop->uio_resid, padlen); 566 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 567 *tl = txdr_unsigned(len); 568 mb->m_next = mp3; 569 nfsm_srvdone; 570 } 571 572 /* 573 * nfs read service 574 */ 575 int 576 nfsrv_read(nfsd, slp, lwp, mrq) 577 struct nfsrv_descript *nfsd; 578 struct nfssvc_sock *slp; 579 struct lwp *lwp; 580 struct mbuf **mrq; 581 { 582 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 583 struct mbuf *nam = nfsd->nd_nam; 584 caddr_t dpos = nfsd->nd_dpos; 585 kauth_cred_t cred = nfsd->nd_cr; 586 struct mbuf *m; 587 struct nfs_fattr *fp; 588 u_int32_t *tl; 589 int32_t t1; 590 int i; 591 caddr_t bpos; 592 int error = 0, rdonly, cache = 0, getret; 593 int v3 = (nfsd->nd_flag & ND_NFSV3); 594 uint32_t reqlen, len, cnt, left; 595 int padlen; 596 char *cp2; 597 struct mbuf *mb, *mreq; 598 struct vnode *vp; 599 nfsfh_t nfh; 600 fhandle_t *fhp; 601 struct uio io, *uiop = &io; 602 struct vattr va; 603 off_t off; 604 u_quad_t frev; 605 606 fhp = &nfh.fh_generic; 607 nfsm_srvmtofh(fhp); 608 if (v3) { 609 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 610 off = fxdr_hyper(tl); 611 } else { 612 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 613 off = (off_t)fxdr_unsigned(u_int32_t, *tl); 614 } 615 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 616 reqlen = fxdr_unsigned(uint32_t, *tl); 617 reqlen = MIN(reqlen, NFS_SRVMAXDATA(nfsd)); 618 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 619 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 620 if (error) { 621 nfsm_reply(2 * NFSX_UNSIGNED); 622 nfsm_srvpostop_attr(1, (struct vattr *)0); 623 return (0); 624 } 625 if (vp->v_type != VREG) { 626 if (v3) 627 error = EINVAL; 628 else 629 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 630 } 631 if (!error) { 632 nqsrv_getl(vp, ND_READ); 633 if ((error = nfsrv_access(vp, VREAD, cred, rdonly, lwp, 1)) != 0) 634 error = nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 1); 635 } 636 getret = VOP_GETATTR(vp, &va, cred, lwp); 637 if (!error) 638 error = getret; 639 if (error) { 640 vput(vp); 641 nfsm_reply(NFSX_POSTOPATTR(v3)); 642 nfsm_srvpostop_attr(getret, &va); 643 return (0); 644 } 645 if (off >= va.va_size) 646 cnt = 0; 647 else if ((off + reqlen) > va.va_size) 648 cnt = va.va_size - off; 649 else 650 cnt = reqlen; 651 nfsm_reply(NFSX_POSTOPORFATTR(v3) + 3 * NFSX_UNSIGNED+nfsm_rndup(cnt)); 652 if (v3) { 653 nfsm_build(tl, u_int32_t *, NFSX_V3FATTR + 4 * NFSX_UNSIGNED); 654 *tl++ = nfs_true; 655 fp = (struct nfs_fattr *)tl; 656 tl += (NFSX_V3FATTR / sizeof (u_int32_t)); 657 } else { 658 nfsm_build(tl, u_int32_t *, NFSX_V2FATTR + NFSX_UNSIGNED); 659 fp = (struct nfs_fattr *)tl; 660 tl += (NFSX_V2FATTR / sizeof (u_int32_t)); 661 } 662 len = left = cnt; 663 if (cnt > 0) { 664 if (nfsd_use_loan) { 665 struct vm_page **pgpp; 666 voff_t pgoff = trunc_page(off); 667 int npages; 668 vaddr_t lva; 669 670 npages = (round_page(off + cnt) - pgoff) >> PAGE_SHIFT; 671 KASSERT(npages <= M_EXT_MAXPAGES); /* XXX */ 672 673 /* allocate kva for mbuf data */ 674 lva = sokvaalloc(npages << PAGE_SHIFT, slp->ns_so); 675 if (lva == 0) { 676 /* fall back to VOP_READ */ 677 goto loan_fail; 678 } 679 680 /* allocate mbuf */ 681 m = m_get(M_WAIT, MT_DATA); 682 MCLAIM(m, &nfs_mowner); 683 pgpp = m->m_ext.ext_pgs; 684 685 /* loan pages */ 686 error = uvm_loanuobjpages(&vp->v_uobj, pgoff, npages, 687 pgpp); 688 if (error) { 689 sokvafree(lva, npages << PAGE_SHIFT); 690 m_free(m); 691 if (error == EBUSY) 692 goto loan_fail; 693 goto read_error; 694 } 695 696 /* associate kva to mbuf */ 697 MEXTADD(m, (void *)(lva + ((vaddr_t)off & PAGE_MASK)), 698 cnt, M_MBUF, soloanfree, slp->ns_so); 699 m->m_flags |= M_EXT_PAGES | M_EXT_ROMAP; 700 m->m_len = cnt; 701 702 /* map pages */ 703 for (i = 0; i < npages; i++) { 704 pmap_kenter_pa(lva, VM_PAGE_TO_PHYS(pgpp[i]), 705 VM_PROT_READ); 706 lva += PAGE_SIZE; 707 } 708 709 pmap_update(pmap_kernel()); 710 711 mb->m_next = m; 712 mb = m; 713 error = 0; 714 uiop->uio_resid = 0; 715 } else { 716 struct iovec *iv; 717 struct iovec *iv2; 718 struct mbuf *m2; 719 int siz; 720 loan_fail: 721 /* 722 * Generate the mbuf list with the uio_iov ref. to it. 723 */ 724 i = 0; 725 m = m2 = mb; 726 while (left > 0) { 727 siz = min(M_TRAILINGSPACE(m), left); 728 if (siz > 0) { 729 left -= siz; 730 i++; 731 } 732 if (left > 0) { 733 m = m_get(M_WAIT, MT_DATA); 734 MCLAIM(m, &nfs_mowner); 735 m_clget(m, M_WAIT); 736 m->m_len = 0; 737 m2->m_next = m; 738 m2 = m; 739 } 740 } 741 iv = malloc(i * sizeof(struct iovec), M_TEMP, M_WAITOK); 742 uiop->uio_iov = iv2 = iv; 743 m = mb; 744 left = cnt; 745 i = 0; 746 while (left > 0) { 747 if (m == NULL) 748 panic("nfsrv_read iov"); 749 siz = min(M_TRAILINGSPACE(m), left); 750 if (siz > 0) { 751 iv->iov_base = mtod(m, caddr_t) + 752 m->m_len; 753 iv->iov_len = siz; 754 m->m_len += siz; 755 left -= siz; 756 iv++; 757 i++; 758 } 759 m = m->m_next; 760 } 761 uiop->uio_iovcnt = i; 762 uiop->uio_offset = off; 763 uiop->uio_resid = cnt; 764 uiop->uio_rw = UIO_READ; 765 UIO_SETUP_SYSSPACE(uiop); 766 error = VOP_READ(vp, uiop, IO_NODELOCKED, cred); 767 free((caddr_t)iv2, M_TEMP); 768 } 769 read_error: 770 if (error || (getret = VOP_GETATTR(vp, &va, cred, lwp)) != 0){ 771 if (!error) 772 error = getret; 773 m_freem(mreq); 774 vput(vp); 775 nfsm_reply(NFSX_POSTOPATTR(v3)); 776 nfsm_srvpostop_attr(getret, &va); 777 return (0); 778 } 779 } else { 780 uiop->uio_resid = 0; 781 } 782 vput(vp); 783 nfsm_srvfillattr(&va, fp); 784 len -= uiop->uio_resid; 785 padlen = nfsm_padlen(len); 786 if (uiop->uio_resid || padlen) 787 nfs_zeropad(mb, uiop->uio_resid, padlen); 788 if (v3) { 789 /* count */ 790 *tl++ = txdr_unsigned(len); 791 /* eof */ 792 if (off + len >= va.va_size) 793 *tl++ = nfs_true; 794 else 795 *tl++ = nfs_false; 796 } 797 *tl = txdr_unsigned(len); 798 nfsm_srvdone; 799 } 800 801 /* 802 * nfs write service 803 */ 804 int 805 nfsrv_write(nfsd, slp, lwp, mrq) 806 struct nfsrv_descript *nfsd; 807 struct nfssvc_sock *slp; 808 struct lwp *lwp; 809 struct mbuf **mrq; 810 { 811 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 812 struct mbuf *nam = nfsd->nd_nam; 813 caddr_t dpos = nfsd->nd_dpos; 814 kauth_cred_t cred = nfsd->nd_cr; 815 struct iovec *ivp; 816 int i, cnt; 817 struct mbuf *mp; 818 struct nfs_fattr *fp; 819 struct iovec *iv; 820 struct vattr va, forat; 821 u_int32_t *tl; 822 int32_t t1; 823 caddr_t bpos; 824 int error = 0, rdonly, cache = 0, len, forat_ret = 1; 825 int ioflags, aftat_ret = 1, retlen, zeroing, adjust; 826 int stable = NFSV3WRITE_FILESYNC; 827 int v3 = (nfsd->nd_flag & ND_NFSV3); 828 char *cp2; 829 struct mbuf *mb, *mreq; 830 struct vnode *vp; 831 nfsfh_t nfh; 832 fhandle_t *fhp; 833 struct uio io, *uiop = &io; 834 off_t off; 835 u_quad_t frev; 836 struct mount *mntp = NULL; 837 838 if (mrep == NULL) { 839 *mrq = NULL; 840 return (0); 841 } 842 fhp = &nfh.fh_generic; 843 nfsm_srvmtofh(fhp); 844 if ((mntp = vfs_getvfs(&fhp->fh_fsid)) == NULL) 845 return (ESTALE); 846 vn_start_write(NULL, &mntp, V_WAIT); 847 if (v3) { 848 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 849 off = fxdr_hyper(tl); 850 tl += 3; 851 stable = fxdr_unsigned(int, *tl++); 852 } else { 853 nfsm_dissect(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 854 off = (off_t)fxdr_unsigned(u_int32_t, *++tl); 855 tl += 2; 856 } 857 retlen = len = fxdr_unsigned(int32_t, *tl); 858 cnt = i = 0; 859 860 /* 861 * For NFS Version 2, it is not obvious what a write of zero length 862 * should do, but I might as well be consistent with Version 3, 863 * which is to return ok so long as there are no permission problems. 864 */ 865 if (len > 0) { 866 zeroing = 1; 867 mp = mrep; 868 while (mp) { 869 if (mp == md) { 870 zeroing = 0; 871 adjust = dpos - mtod(mp, caddr_t); 872 mp->m_len -= adjust; 873 if (mp->m_len > 0 && adjust > 0) 874 NFSMADV(mp, adjust); 875 } 876 if (zeroing) 877 mp->m_len = 0; 878 else if (mp->m_len > 0) { 879 i += mp->m_len; 880 if (i > len) { 881 mp->m_len -= (i - len); 882 zeroing = 1; 883 } 884 if (mp->m_len > 0) 885 cnt++; 886 } 887 mp = mp->m_next; 888 } 889 } 890 if (len > NFS_MAXDATA || len < 0 || i < len) { 891 error = EIO; 892 nfsm_reply(2 * NFSX_UNSIGNED); 893 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 894 vn_finished_write(mntp, 0); 895 return (0); 896 } 897 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 898 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 899 if (error) { 900 nfsm_reply(2 * NFSX_UNSIGNED); 901 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 902 vn_finished_write(mntp, 0); 903 return (0); 904 } 905 if (v3) 906 forat_ret = VOP_GETATTR(vp, &forat, cred, lwp); 907 if (vp->v_type != VREG) { 908 if (v3) 909 error = EINVAL; 910 else 911 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 912 } 913 if (!error) { 914 nqsrv_getl(vp, ND_WRITE); 915 error = nfsrv_access(vp, VWRITE, cred, rdonly, lwp, 1); 916 } 917 if (error) { 918 vput(vp); 919 nfsm_reply(NFSX_WCCDATA(v3)); 920 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 921 vn_finished_write(mntp, 0); 922 return (0); 923 } 924 925 if (len > 0) { 926 ivp = malloc(cnt * sizeof (struct iovec), M_TEMP, M_WAITOK); 927 uiop->uio_iov = iv = ivp; 928 uiop->uio_iovcnt = cnt; 929 mp = mrep; 930 while (mp) { 931 if (mp->m_len > 0) { 932 ivp->iov_base = mtod(mp, caddr_t); 933 ivp->iov_len = mp->m_len; 934 ivp++; 935 } 936 mp = mp->m_next; 937 } 938 939 /* 940 * XXX 941 * The IO_METASYNC flag indicates that all metadata (and not 942 * just enough to ensure data integrity) must be written to 943 * stable storage synchronously. 944 * (IO_METASYNC is not yet implemented in 4.4BSD-Lite.) 945 */ 946 if (stable == NFSV3WRITE_UNSTABLE) 947 ioflags = IO_NODELOCKED; 948 else if (stable == NFSV3WRITE_DATASYNC) 949 ioflags = (IO_SYNC | IO_NODELOCKED); 950 else 951 ioflags = (IO_METASYNC | IO_SYNC | IO_NODELOCKED); 952 uiop->uio_resid = len; 953 uiop->uio_rw = UIO_WRITE; 954 uiop->uio_offset = off; 955 UIO_SETUP_SYSSPACE(uiop); 956 error = VOP_WRITE(vp, uiop, ioflags, cred); 957 nfsstats.srvvop_writes++; 958 free(iv, M_TEMP); 959 } 960 aftat_ret = VOP_GETATTR(vp, &va, cred, lwp); 961 vput(vp); 962 vn_finished_write(mntp, 0); 963 if (!error) 964 error = aftat_ret; 965 nfsm_reply(NFSX_PREOPATTR(v3) + NFSX_POSTOPORFATTR(v3) + 966 2 * NFSX_UNSIGNED + NFSX_WRITEVERF(v3)); 967 if (v3) { 968 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 969 if (error) 970 return (0); 971 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 972 *tl++ = txdr_unsigned(retlen); 973 if (stable == NFSV3WRITE_UNSTABLE) 974 *tl++ = txdr_unsigned(stable); 975 else 976 *tl++ = txdr_unsigned(NFSV3WRITE_FILESYNC); 977 /* 978 * Actually, there is no need to txdr these fields, 979 * but it may make the values more human readable, 980 * for debugging purposes. 981 */ 982 *tl++ = txdr_unsigned(boottime.tv_sec); 983 *tl = txdr_unsigned(boottime.tv_usec); 984 } else { 985 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 986 nfsm_srvfillattr(&va, fp); 987 } 988 nfsm_srvdone; 989 } 990 991 /* 992 * XXX elad: the original NFSW_SAMECRED() macro also made sure the 993 * two nd_flag fields of the descriptors contained 994 * ND_KERBAUTH. 995 */ 996 static int 997 nfsrv_samecred(kauth_cred_t cred1, kauth_cred_t cred2) 998 { 999 int i, do_ngroups; 1000 1001 if (kauth_cred_geteuid(cred1) != kauth_cred_geteuid(cred2)) 1002 return (0); 1003 if (kauth_cred_ngroups(cred1) != kauth_cred_ngroups(cred2)) 1004 return (0); 1005 do_ngroups = kauth_cred_ngroups(cred1); 1006 for (i = 0; i < do_ngroups; i++) 1007 if (kauth_cred_group(cred1, i) != 1008 kauth_cred_group(cred2, i)) 1009 return (0); 1010 1011 return (1); 1012 } 1013 1014 /* 1015 * NFS write service with write gathering support. Called when 1016 * nfsrvw_procrastinate > 0. 1017 * See: Chet Juszczak, "Improving the Write Performance of an NFS Server", 1018 * in Proc. of the Winter 1994 Usenix Conference, pg. 247-259, San Franscisco, 1019 * Jan. 1994. 1020 */ 1021 int 1022 nfsrv_writegather(ndp, slp, lwp, mrq) 1023 struct nfsrv_descript **ndp; 1024 struct nfssvc_sock *slp; 1025 struct lwp *lwp; 1026 struct mbuf **mrq; 1027 { 1028 struct timeval now; 1029 struct iovec *ivp; 1030 struct mbuf *mp; 1031 struct nfsrv_descript *wp, *nfsd, *owp, *swp; 1032 struct nfs_fattr *fp; 1033 int i = 0; 1034 struct iovec *iov; 1035 struct nfsrvw_delayhash *wpp; 1036 kauth_cred_t cred; 1037 struct vattr va, forat; 1038 u_int32_t *tl; 1039 int32_t t1; 1040 caddr_t bpos, dpos; 1041 int error = 0, rdonly, cache = 0, len = 0, forat_ret = 1; 1042 int ioflags, aftat_ret = 1, s, adjust, v3, zeroing; 1043 char *cp2; 1044 struct mbuf *mb, *mreq, *mrep, *md; 1045 struct vnode *vp; 1046 struct uio io, *uiop = &io; 1047 u_quad_t frev, cur_usec; 1048 struct mount *mntp = NULL; 1049 1050 *mrq = NULL; 1051 if (*ndp) { 1052 nfsd = *ndp; 1053 *ndp = NULL; 1054 mrep = nfsd->nd_mrep; 1055 md = nfsd->nd_md; 1056 dpos = nfsd->nd_dpos; 1057 cred = nfsd->nd_cr; 1058 v3 = (nfsd->nd_flag & ND_NFSV3); 1059 LIST_INIT(&nfsd->nd_coalesce); 1060 nfsd->nd_mreq = NULL; 1061 nfsd->nd_stable = NFSV3WRITE_FILESYNC; 1062 getmicrotime(&now); 1063 cur_usec = (u_quad_t)now.tv_sec * 1000000 + (u_quad_t)now.tv_usec; 1064 nfsd->nd_time = cur_usec + nfsrvw_procrastinate; 1065 1066 /* 1067 * Now, get the write header.. 1068 */ 1069 nfsm_srvmtofh(&nfsd->nd_fh); 1070 if (v3) { 1071 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 1072 nfsd->nd_off = fxdr_hyper(tl); 1073 tl += 3; 1074 nfsd->nd_stable = fxdr_unsigned(int, *tl++); 1075 } else { 1076 nfsm_dissect(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1077 nfsd->nd_off = (off_t)fxdr_unsigned(u_int32_t, *++tl); 1078 tl += 2; 1079 } 1080 len = fxdr_unsigned(int32_t, *tl); 1081 nfsd->nd_len = len; 1082 nfsd->nd_eoff = nfsd->nd_off + len; 1083 1084 /* 1085 * Trim the header out of the mbuf list and trim off any trailing 1086 * junk so that the mbuf list has only the write data. 1087 */ 1088 zeroing = 1; 1089 i = 0; 1090 mp = mrep; 1091 while (mp) { 1092 if (mp == md) { 1093 zeroing = 0; 1094 adjust = dpos - mtod(mp, caddr_t); 1095 mp->m_len -= adjust; 1096 if (mp->m_len > 0 && adjust > 0) 1097 NFSMADV(mp, adjust); 1098 } 1099 if (zeroing) 1100 mp->m_len = 0; 1101 else { 1102 i += mp->m_len; 1103 if (i > len) { 1104 mp->m_len -= (i - len); 1105 zeroing = 1; 1106 } 1107 } 1108 mp = mp->m_next; 1109 } 1110 if (len > NFS_MAXDATA || len < 0 || i < len) { 1111 nfsmout: 1112 m_freem(mrep); 1113 error = EIO; 1114 nfsm_writereply(2 * NFSX_UNSIGNED, v3); 1115 if (v3) 1116 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1117 nfsd->nd_mreq = mreq; 1118 nfsd->nd_mrep = NULL; 1119 nfsd->nd_time = 0; 1120 } 1121 1122 /* 1123 * Add this entry to the hash and time queues. 1124 */ 1125 s = splsoftclock(); 1126 owp = NULL; 1127 wp = LIST_FIRST(&slp->ns_tq); 1128 while (wp && wp->nd_time < nfsd->nd_time) { 1129 owp = wp; 1130 wp = LIST_NEXT(wp, nd_tq); 1131 } 1132 if (owp) { 1133 LIST_INSERT_AFTER(owp, nfsd, nd_tq); 1134 } else { 1135 LIST_INSERT_HEAD(&slp->ns_tq, nfsd, nd_tq); 1136 } 1137 if (nfsd->nd_mrep) { 1138 wpp = NWDELAYHASH(slp, nfsd->nd_fh.fh_generic.fh_fid.fid_data); 1139 owp = NULL; 1140 wp = LIST_FIRST(wpp); 1141 while (wp && 1142 memcmp(&nfsd->nd_fh, &wp->nd_fh, NFSX_V3FH)) { 1143 owp = wp; 1144 wp = LIST_NEXT(wp, nd_hash); 1145 } 1146 while (wp && wp->nd_off < nfsd->nd_off && 1147 !memcmp(&nfsd->nd_fh, &wp->nd_fh, NFSX_V3FH)) { 1148 owp = wp; 1149 wp = LIST_NEXT(wp, nd_hash); 1150 } 1151 if (owp) { 1152 LIST_INSERT_AFTER(owp, nfsd, nd_hash); 1153 1154 /* 1155 * Search the hash list for overlapping entries and 1156 * coalesce. 1157 */ 1158 for(; nfsd && NFSW_CONTIG(owp, nfsd); nfsd = wp) { 1159 wp = LIST_NEXT(nfsd, nd_hash); 1160 if (nfsrv_samecred(owp->nd_cr, nfsd->nd_cr)) 1161 nfsrvw_coalesce(owp, nfsd); 1162 } 1163 } else { 1164 LIST_INSERT_HEAD(wpp, nfsd, nd_hash); 1165 } 1166 } 1167 splx(s); 1168 } 1169 1170 /* 1171 * Now, do VOP_WRITE()s for any one(s) that need to be done now 1172 * and generate the associated reply mbuf list(s). 1173 */ 1174 loop1: 1175 getmicrotime(&now); 1176 cur_usec = (u_quad_t)now.tv_sec * 1000000 + (u_quad_t)now.tv_usec; 1177 s = splsoftclock(); 1178 for (nfsd = LIST_FIRST(&slp->ns_tq); nfsd; nfsd = owp) { 1179 owp = LIST_NEXT(nfsd, nd_tq); 1180 if (nfsd->nd_time > cur_usec) 1181 break; 1182 if (nfsd->nd_mreq) 1183 continue; 1184 LIST_REMOVE(nfsd, nd_tq); 1185 LIST_REMOVE(nfsd, nd_hash); 1186 splx(s); 1187 mrep = nfsd->nd_mrep; 1188 nfsd->nd_mrep = NULL; 1189 cred = nfsd->nd_cr; 1190 v3 = (nfsd->nd_flag & ND_NFSV3); 1191 forat_ret = aftat_ret = 1; 1192 error = nfsrv_fhtovp(&nfsd->nd_fh.fh_generic, 1, &vp, cred, slp, 1193 nfsd->nd_nam, &rdonly, (nfsd->nd_flag & ND_KERBAUTH), 1194 FALSE); 1195 if (!error) { 1196 if (v3) 1197 forat_ret = VOP_GETATTR(vp, &forat, cred, lwp); 1198 if (vp->v_type != VREG) { 1199 if (v3) 1200 error = EINVAL; 1201 else 1202 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 1203 } 1204 } else 1205 vp = NULL; 1206 if (!error) { 1207 nqsrv_getl(vp, ND_WRITE); 1208 error = nfsrv_access(vp, VWRITE, cred, rdonly, lwp, 1); 1209 } 1210 1211 if (nfsd->nd_stable == NFSV3WRITE_UNSTABLE) 1212 ioflags = IO_NODELOCKED; 1213 else if (nfsd->nd_stable == NFSV3WRITE_DATASYNC) 1214 ioflags = (IO_SYNC | IO_NODELOCKED); 1215 else 1216 ioflags = (IO_METASYNC | IO_SYNC | IO_NODELOCKED); 1217 uiop->uio_rw = UIO_WRITE; 1218 uiop->uio_offset = nfsd->nd_off; 1219 uiop->uio_resid = nfsd->nd_eoff - nfsd->nd_off; 1220 UIO_SETUP_SYSSPACE(uiop); 1221 if (uiop->uio_resid > 0) { 1222 mp = mrep; 1223 i = 0; 1224 while (mp) { 1225 if (mp->m_len > 0) 1226 i++; 1227 mp = mp->m_next; 1228 } 1229 uiop->uio_iovcnt = i; 1230 iov = malloc(i * sizeof (struct iovec), M_TEMP, M_WAITOK); 1231 uiop->uio_iov = ivp = iov; 1232 mp = mrep; 1233 while (mp) { 1234 if (mp->m_len > 0) { 1235 ivp->iov_base = mtod(mp, caddr_t); 1236 ivp->iov_len = mp->m_len; 1237 ivp++; 1238 } 1239 mp = mp->m_next; 1240 } 1241 if (!error) { 1242 if (vn_start_write(vp, &mntp, V_NOWAIT) != 0) { 1243 VOP_UNLOCK(vp, 0); 1244 vn_start_write(NULL, &mntp, V_WAIT); 1245 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 1246 } 1247 if (!error) { 1248 error = VOP_WRITE(vp, uiop, ioflags, cred); 1249 nfsstats.srvvop_writes++; 1250 vn_finished_write(mntp, 0); 1251 } 1252 } 1253 free((caddr_t)iov, M_TEMP); 1254 } 1255 m_freem(mrep); 1256 if (vp) { 1257 aftat_ret = VOP_GETATTR(vp, &va, cred, lwp); 1258 vput(vp); 1259 } 1260 1261 /* 1262 * Loop around generating replies for all write rpcs that have 1263 * now been completed. 1264 */ 1265 swp = nfsd; 1266 do { 1267 if (error) { 1268 nfsm_writereply(NFSX_WCCDATA(v3), v3); 1269 if (v3) { 1270 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1271 } 1272 } else { 1273 nfsm_writereply(NFSX_PREOPATTR(v3) + 1274 NFSX_POSTOPORFATTR(v3) + 2 * NFSX_UNSIGNED + 1275 NFSX_WRITEVERF(v3), v3); 1276 if (v3) { 1277 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1278 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1279 *tl++ = txdr_unsigned(nfsd->nd_len); 1280 *tl++ = txdr_unsigned(swp->nd_stable); 1281 /* 1282 * Actually, there is no need to txdr these fields, 1283 * but it may make the values more human readable, 1284 * for debugging purposes. 1285 */ 1286 *tl++ = txdr_unsigned(boottime.tv_sec); 1287 *tl = txdr_unsigned(boottime.tv_usec); 1288 } else { 1289 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 1290 nfsm_srvfillattr(&va, fp); 1291 } 1292 } 1293 nfsd->nd_mreq = mreq; 1294 if (nfsd->nd_mrep) 1295 panic("nfsrv_write: nd_mrep not free"); 1296 1297 /* 1298 * Done. Put it at the head of the timer queue so that 1299 * the final phase can return the reply. 1300 */ 1301 s = splsoftclock(); 1302 if (nfsd != swp) { 1303 nfsd->nd_time = 0; 1304 LIST_INSERT_HEAD(&slp->ns_tq, nfsd, nd_tq); 1305 } 1306 nfsd = LIST_FIRST(&swp->nd_coalesce); 1307 if (nfsd) { 1308 LIST_REMOVE(nfsd, nd_tq); 1309 } 1310 splx(s); 1311 } while (nfsd); 1312 s = splsoftclock(); 1313 swp->nd_time = 0; 1314 LIST_INSERT_HEAD(&slp->ns_tq, swp, nd_tq); 1315 splx(s); 1316 goto loop1; 1317 } 1318 splx(s); 1319 1320 /* 1321 * Search for a reply to return. 1322 */ 1323 s = splsoftclock(); 1324 LIST_FOREACH(nfsd, &slp->ns_tq, nd_tq) { 1325 if (nfsd->nd_mreq) { 1326 LIST_REMOVE(nfsd, nd_tq); 1327 *mrq = nfsd->nd_mreq; 1328 *ndp = nfsd; 1329 break; 1330 } 1331 } 1332 splx(s); 1333 return (0); 1334 } 1335 1336 /* 1337 * Coalesce the write request nfsd into owp. To do this we must: 1338 * - remove nfsd from the queues 1339 * - merge nfsd->nd_mrep into owp->nd_mrep 1340 * - update the nd_eoff and nd_stable for owp 1341 * - put nfsd on owp's nd_coalesce list 1342 * NB: Must be called at splsoftclock(). 1343 */ 1344 void 1345 nfsrvw_coalesce(owp, nfsd) 1346 struct nfsrv_descript *owp; 1347 struct nfsrv_descript *nfsd; 1348 { 1349 int overlap; 1350 struct mbuf *mp; 1351 struct nfsrv_descript *m; 1352 1353 LIST_REMOVE(nfsd, nd_hash); 1354 LIST_REMOVE(nfsd, nd_tq); 1355 if (owp->nd_eoff < nfsd->nd_eoff) { 1356 overlap = owp->nd_eoff - nfsd->nd_off; 1357 if (overlap < 0) 1358 panic("nfsrv_coalesce: bad off"); 1359 if (overlap > 0) 1360 m_adj(nfsd->nd_mrep, overlap); 1361 mp = owp->nd_mrep; 1362 while (mp->m_next) 1363 mp = mp->m_next; 1364 mp->m_next = nfsd->nd_mrep; 1365 owp->nd_eoff = nfsd->nd_eoff; 1366 } else 1367 m_freem(nfsd->nd_mrep); 1368 nfsd->nd_mrep = NULL; 1369 if (nfsd->nd_stable == NFSV3WRITE_FILESYNC) 1370 owp->nd_stable = NFSV3WRITE_FILESYNC; 1371 else if (nfsd->nd_stable == NFSV3WRITE_DATASYNC && 1372 owp->nd_stable == NFSV3WRITE_UNSTABLE) 1373 owp->nd_stable = NFSV3WRITE_DATASYNC; 1374 LIST_INSERT_HEAD(&owp->nd_coalesce, nfsd, nd_tq); 1375 /* 1376 * nfsd might hold coalesce elements! Move them to owp. 1377 * Otherwise, requests may be lost and clients will be stuck. 1378 */ 1379 while ((m = LIST_FIRST(&nfsd->nd_coalesce)) != NULL) { 1380 LIST_REMOVE(m, nd_tq); 1381 LIST_INSERT_HEAD(&owp->nd_coalesce, m, nd_tq); 1382 } 1383 } 1384 1385 /* 1386 * nfs create service 1387 * now does a truncate to 0 length via. setattr if it already exists 1388 */ 1389 int 1390 nfsrv_create(nfsd, slp, lwp, mrq) 1391 struct nfsrv_descript *nfsd; 1392 struct nfssvc_sock *slp; 1393 struct lwp *lwp; 1394 struct mbuf **mrq; 1395 { 1396 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1397 struct mbuf *nam = nfsd->nd_nam; 1398 caddr_t dpos = nfsd->nd_dpos; 1399 kauth_cred_t cred = nfsd->nd_cr; 1400 struct nfs_fattr *fp; 1401 struct vattr va, dirfor, diraft; 1402 struct nfsv2_sattr *sp; 1403 u_int32_t *tl; 1404 struct nameidata nd; 1405 caddr_t cp; 1406 int32_t t1; 1407 caddr_t bpos; 1408 int error = 0, cache = 0, len, tsize, dirfor_ret = 1, diraft_ret = 1; 1409 int rdev = 0; 1410 int v3 = (nfsd->nd_flag & ND_NFSV3), how, exclusive_flag = 0; 1411 char *cp2; 1412 struct mbuf *mb, *mreq; 1413 struct vnode *vp = NULL, *dirp = NULL; 1414 nfsfh_t nfh; 1415 fhandle_t *fhp; 1416 size_t fh_size; 1417 u_quad_t frev, tempsize; 1418 u_char cverf[NFSX_V3CREATEVERF]; 1419 struct mount *mp = NULL; 1420 1421 nd.ni_cnd.cn_nameiop = 0; 1422 fhp = &nfh.fh_generic; 1423 fh_size = NFS_SMALLFH; 1424 nfsm_srvmtofh(fhp); 1425 if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) 1426 return (ESTALE); 1427 vn_start_write(NULL, &mp, V_WAIT); 1428 nfsm_srvnamesiz(len); 1429 nd.ni_cnd.cn_cred = cred; 1430 nd.ni_cnd.cn_nameiop = CREATE; 1431 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 1432 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 1433 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1434 if (dirp) { 1435 if (v3) 1436 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, lwp); 1437 else { 1438 vrele(dirp); 1439 dirp = (struct vnode *)0; 1440 } 1441 } 1442 if (error) { 1443 nfsm_reply(NFSX_WCCDATA(v3)); 1444 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1445 if (dirp) 1446 vrele(dirp); 1447 vn_finished_write(mp, 0); 1448 return (0); 1449 } 1450 VATTR_NULL(&va); 1451 if (v3) { 1452 va.va_mode = 0; 1453 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1454 how = fxdr_unsigned(int, *tl); 1455 switch (how) { 1456 case NFSV3CREATE_GUARDED: 1457 if (nd.ni_vp) { 1458 error = EEXIST; 1459 break; 1460 } 1461 case NFSV3CREATE_UNCHECKED: 1462 nfsm_srvsattr(&va); 1463 break; 1464 case NFSV3CREATE_EXCLUSIVE: 1465 nfsm_dissect(cp, caddr_t, NFSX_V3CREATEVERF); 1466 memcpy(cverf, cp, NFSX_V3CREATEVERF); 1467 exclusive_flag = 1; 1468 break; 1469 }; 1470 va.va_type = VREG; 1471 } else { 1472 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1473 va.va_type = IFTOVT(fxdr_unsigned(u_int32_t, sp->sa_mode)); 1474 if (va.va_type == VNON) 1475 va.va_type = VREG; 1476 va.va_mode = nfstov_mode(sp->sa_mode); 1477 switch (va.va_type) { 1478 case VREG: 1479 tsize = fxdr_unsigned(int32_t, sp->sa_size); 1480 if (tsize != -1) 1481 va.va_size = (u_quad_t)tsize; 1482 break; 1483 case VCHR: 1484 case VBLK: 1485 case VFIFO: 1486 rdev = fxdr_unsigned(int32_t, sp->sa_size); 1487 break; 1488 default: 1489 break; 1490 }; 1491 } 1492 1493 /* 1494 * Iff doesn't exist, create it 1495 * otherwise just truncate to 0 length 1496 * should I set the mode too ?? 1497 */ 1498 if (nd.ni_vp == NULL) { 1499 if (va.va_type == VREG || va.va_type == VSOCK) { 1500 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1501 error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1502 if (!error) { 1503 if (exclusive_flag) { 1504 exclusive_flag = 0; 1505 VATTR_NULL(&va); 1506 /* 1507 * XXX 1508 * assuming NFSX_V3CREATEVERF 1509 * == sizeof(nfstime3) 1510 */ 1511 fxdr_nfsv3time(cverf, &va.va_atime); 1512 error = VOP_SETATTR(nd.ni_vp, &va, cred, 1513 lwp); 1514 } 1515 } 1516 } else if (va.va_type == VCHR || va.va_type == VBLK || 1517 va.va_type == VFIFO) { 1518 if (va.va_type == VCHR && rdev == 0xffffffff) 1519 va.va_type = VFIFO; 1520 if (va.va_type != VFIFO && 1521 (error = kauth_authorize_generic(cred, 1522 KAUTH_GENERIC_ISSUSER, (u_short *)0))) { 1523 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1524 vput(nd.ni_dvp); 1525 nfsm_reply(0); 1526 vn_finished_write(mp, 0); 1527 return (error); 1528 } else 1529 va.va_rdev = (dev_t)rdev; 1530 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1531 error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, 1532 &va); 1533 if (error) { 1534 nfsm_reply(0); 1535 } 1536 if (nd.ni_cnd.cn_flags & ISSYMLINK) { 1537 vrele(nd.ni_dvp); 1538 vput(nd.ni_vp); 1539 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1540 error = EINVAL; 1541 nfsm_reply(0); 1542 } 1543 } else { 1544 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1545 vput(nd.ni_dvp); 1546 error = ENXIO; 1547 } 1548 vp = nd.ni_vp; 1549 } else { 1550 vp = nd.ni_vp; 1551 if (nd.ni_dvp == vp) 1552 vrele(nd.ni_dvp); 1553 else 1554 vput(nd.ni_dvp); 1555 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1556 if (!error && va.va_size != -1) { 1557 error = nfsrv_access(vp, VWRITE, cred, 1558 (nd.ni_cnd.cn_flags & RDONLY), lwp, 0); 1559 if (!error) { 1560 nqsrv_getl(vp, ND_WRITE); 1561 tempsize = va.va_size; 1562 VATTR_NULL(&va); 1563 va.va_size = tempsize; 1564 error = VOP_SETATTR(vp, &va, cred, lwp); 1565 } 1566 } 1567 if (error) 1568 vput(vp); 1569 } 1570 if (!error) { 1571 error = vfs_composefh(vp, fhp, &fh_size); 1572 if (!error) 1573 error = VOP_GETATTR(vp, &va, cred, lwp); 1574 vput(vp); 1575 } 1576 if (v3) { 1577 if (exclusive_flag && !error) { 1578 /* 1579 * XXX assuming NFSX_V3CREATEVERF == sizeof(nfstime3) 1580 */ 1581 char oldverf[NFSX_V3CREATEVERF]; 1582 1583 txdr_nfsv3time(&va.va_atime, oldverf); 1584 if (memcmp(cverf, oldverf, NFSX_V3CREATEVERF)) 1585 error = EEXIST; 1586 } 1587 if (dirp) { 1588 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, lwp); 1589 vrele(dirp); 1590 } 1591 } 1592 nfsm_reply(NFSX_SRVFH(v3) + NFSX_FATTR(v3) + NFSX_WCCDATA(v3)); 1593 if (v3) { 1594 if (!error) { 1595 nfsm_srvpostop_fh(fhp); 1596 nfsm_srvpostop_attr(0, &va); 1597 } 1598 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1599 } else { 1600 nfsm_srvfhtom(fhp, v3); 1601 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 1602 nfsm_srvfillattr(&va, fp); 1603 } 1604 vn_finished_write(mp, 0); 1605 return (0); 1606 nfsmout: 1607 if (dirp) 1608 vrele(dirp); 1609 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1610 if (nd.ni_dvp == nd.ni_vp) 1611 vrele(nd.ni_dvp); 1612 else 1613 vput(nd.ni_dvp); 1614 if (nd.ni_vp) 1615 vput(nd.ni_vp); 1616 vn_finished_write(mp, 0); 1617 return (error); 1618 } 1619 1620 /* 1621 * nfs v3 mknod service 1622 */ 1623 int 1624 nfsrv_mknod(nfsd, slp, lwp, mrq) 1625 struct nfsrv_descript *nfsd; 1626 struct nfssvc_sock *slp; 1627 struct lwp *lwp; 1628 struct mbuf **mrq; 1629 { 1630 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1631 struct mbuf *nam = nfsd->nd_nam; 1632 caddr_t dpos = nfsd->nd_dpos; 1633 kauth_cred_t cred = nfsd->nd_cr; 1634 struct vattr va, dirfor, diraft; 1635 u_int32_t *tl; 1636 struct nameidata nd; 1637 int32_t t1; 1638 caddr_t bpos; 1639 int error = 0, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 1640 u_int32_t major, minor; 1641 enum vtype vtyp; 1642 char *cp2; 1643 struct mbuf *mb, *mreq; 1644 struct vnode *vp, *dirp = (struct vnode *)0; 1645 nfsfh_t nfh; 1646 fhandle_t *fhp; 1647 size_t fh_size; 1648 u_quad_t frev; 1649 struct mount *mp = NULL; 1650 1651 nd.ni_cnd.cn_nameiop = 0; 1652 fhp = &nfh.fh_generic; 1653 fh_size = NFS_SMALLFH; 1654 nfsm_srvmtofh(fhp); 1655 if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) 1656 return (ESTALE); 1657 vn_start_write(NULL, &mp, V_WAIT); 1658 nfsm_srvnamesiz(len); 1659 nd.ni_cnd.cn_cred = cred; 1660 nd.ni_cnd.cn_nameiop = CREATE; 1661 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 1662 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 1663 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1664 if (dirp) 1665 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, lwp); 1666 if (error) { 1667 nfsm_reply(NFSX_WCCDATA(1)); 1668 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1669 if (dirp) 1670 vrele(dirp); 1671 vn_finished_write(mp, 0); 1672 return (0); 1673 } 1674 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1675 vtyp = nfsv3tov_type(*tl); 1676 if (vtyp != VCHR && vtyp != VBLK && vtyp != VSOCK && vtyp != VFIFO) { 1677 error = NFSERR_BADTYPE; 1678 goto abort; 1679 } 1680 VATTR_NULL(&va); 1681 va.va_mode = 0; 1682 nfsm_srvsattr(&va); 1683 if (vtyp == VCHR || vtyp == VBLK) { 1684 dev_t rdev; 1685 1686 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1687 major = fxdr_unsigned(u_int32_t, *tl++); 1688 minor = fxdr_unsigned(u_int32_t, *tl); 1689 rdev = makedev(major, minor); 1690 if (major(rdev) != major || minor(rdev) != minor) { 1691 error = EINVAL; 1692 goto abort; 1693 } 1694 va.va_rdev = rdev; 1695 } 1696 1697 /* 1698 * Iff doesn't exist, create it. 1699 */ 1700 if (nd.ni_vp) { 1701 error = EEXIST; 1702 abort: 1703 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1704 if (nd.ni_dvp == nd.ni_vp) 1705 vrele(nd.ni_dvp); 1706 else 1707 vput(nd.ni_dvp); 1708 if (nd.ni_vp) 1709 vput(nd.ni_vp); 1710 goto out; 1711 } 1712 va.va_type = vtyp; 1713 if (vtyp == VSOCK) { 1714 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1715 error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1716 } else { 1717 if (va.va_type != VFIFO && 1718 (error = kauth_authorize_generic(cred, 1719 KAUTH_GENERIC_ISSUSER, (u_short *)0))) { 1720 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1721 vput(nd.ni_dvp); 1722 goto out; 1723 } 1724 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1725 error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1726 if (error) 1727 goto out; 1728 if (nd.ni_cnd.cn_flags & ISSYMLINK) { 1729 vput(nd.ni_vp); 1730 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1731 error = EINVAL; 1732 } 1733 } 1734 out: 1735 vp = nd.ni_vp; 1736 if (!error) { 1737 error = vfs_composefh(vp, fhp, &fh_size); 1738 if (!error) 1739 error = VOP_GETATTR(vp, &va, cred, lwp); 1740 vput(vp); 1741 } 1742 if (dirp) { 1743 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, lwp); 1744 vrele(dirp); 1745 } 1746 nfsm_reply(NFSX_SRVFH(1) + NFSX_POSTOPATTR(1) + NFSX_WCCDATA(1)); 1747 if (!error) { 1748 nfsm_srvpostop_fh(fhp); 1749 nfsm_srvpostop_attr(0, &va); 1750 } 1751 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1752 vn_finished_write(mp, 0); 1753 return (0); 1754 nfsmout: 1755 if (dirp) 1756 vrele(dirp); 1757 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1758 if (nd.ni_dvp == nd.ni_vp) 1759 vrele(nd.ni_dvp); 1760 else 1761 vput(nd.ni_dvp); 1762 if (nd.ni_vp) 1763 vput(nd.ni_vp); 1764 vn_finished_write(mp, 0); 1765 return (error); 1766 } 1767 1768 /* 1769 * nfs remove service 1770 */ 1771 int 1772 nfsrv_remove(nfsd, slp, lwp, mrq) 1773 struct nfsrv_descript *nfsd; 1774 struct nfssvc_sock *slp; 1775 struct lwp *lwp; 1776 struct mbuf **mrq; 1777 { 1778 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1779 struct mbuf *nam = nfsd->nd_nam; 1780 caddr_t dpos = nfsd->nd_dpos; 1781 kauth_cred_t cred = nfsd->nd_cr; 1782 struct nameidata nd; 1783 u_int32_t *tl; 1784 int32_t t1; 1785 caddr_t bpos; 1786 int error = 0, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 1787 int v3 = (nfsd->nd_flag & ND_NFSV3); 1788 char *cp2; 1789 struct mbuf *mb, *mreq; 1790 struct vnode *vp, *dirp; 1791 struct vattr dirfor, diraft; 1792 nfsfh_t nfh; 1793 fhandle_t *fhp; 1794 u_quad_t frev; 1795 struct mount *mp = NULL; 1796 1797 #ifndef nolint 1798 vp = (struct vnode *)0; 1799 #endif 1800 fhp = &nfh.fh_generic; 1801 nfsm_srvmtofh(fhp); 1802 if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) 1803 return (ESTALE); 1804 vn_start_write(NULL, &mp, V_WAIT); 1805 nfsm_srvnamesiz(len); 1806 nd.ni_cnd.cn_cred = cred; 1807 nd.ni_cnd.cn_nameiop = DELETE; 1808 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 1809 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 1810 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1811 if (dirp) { 1812 if (v3) 1813 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, lwp); 1814 else 1815 vrele(dirp); 1816 } 1817 if (!error) { 1818 vp = nd.ni_vp; 1819 if (vp->v_type == VDIR && 1820 (error = kauth_authorize_generic(cred, 1821 KAUTH_GENERIC_ISSUSER, (u_short *)0)) != 0) 1822 goto out; 1823 /* 1824 * The root of a mounted filesystem cannot be deleted. 1825 */ 1826 if (vp->v_flag & VROOT) { 1827 error = EBUSY; 1828 goto out; 1829 } 1830 out: 1831 if (!error) { 1832 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1833 nqsrv_getl(vp, ND_WRITE); 1834 error = VOP_REMOVE(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); 1835 } else { 1836 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1837 if (nd.ni_dvp == vp) 1838 vrele(nd.ni_dvp); 1839 else 1840 vput(nd.ni_dvp); 1841 vput(vp); 1842 } 1843 } 1844 if (dirp && v3) { 1845 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, lwp); 1846 vrele(dirp); 1847 } 1848 nfsm_reply(NFSX_WCCDATA(v3)); 1849 if (v3) { 1850 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1851 vn_finished_write(mp, 0); 1852 return (0); 1853 } 1854 vn_finished_write(mp, 0); 1855 nfsm_srvdone; 1856 } 1857 1858 /* 1859 * nfs rename service 1860 */ 1861 int 1862 nfsrv_rename(nfsd, slp, lwp, mrq) 1863 struct nfsrv_descript *nfsd; 1864 struct nfssvc_sock *slp; 1865 struct lwp *lwp; 1866 struct mbuf **mrq; 1867 { 1868 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1869 struct mbuf *nam = nfsd->nd_nam; 1870 caddr_t dpos = nfsd->nd_dpos; 1871 kauth_cred_t cred = nfsd->nd_cr; 1872 u_int32_t *tl; 1873 int32_t t1; 1874 caddr_t bpos; 1875 int error = 0, cache = 0, fdirfor_ret = 1, fdiraft_ret = 1; 1876 uint32_t len, len2; 1877 int tdirfor_ret = 1, tdiraft_ret = 1; 1878 int v3 = (nfsd->nd_flag & ND_NFSV3); 1879 char *cp2; 1880 struct mbuf *mb, *mreq; 1881 struct nameidata fromnd, tond; 1882 struct vnode *fvp, *tvp, *tdvp, *fdirp = (struct vnode *)0; 1883 struct vnode *tdirp = (struct vnode *)0; 1884 struct vattr fdirfor, fdiraft, tdirfor, tdiraft; 1885 nfsfh_t fnfh, tnfh; 1886 fhandle_t *ffhp, *tfhp; 1887 u_quad_t frev; 1888 uid_t saved_uid; 1889 struct mount *mp = NULL; 1890 1891 #ifndef nolint 1892 fvp = (struct vnode *)0; 1893 #endif 1894 ffhp = &fnfh.fh_generic; 1895 tfhp = &tnfh.fh_generic; 1896 fromnd.ni_cnd.cn_nameiop = 0; 1897 tond.ni_cnd.cn_nameiop = 0; 1898 nfsm_srvmtofh(ffhp); 1899 if ((mp = vfs_getvfs(&ffhp->fh_fsid)) == NULL) 1900 return (ESTALE); 1901 vn_start_write(NULL, &mp, V_WAIT); 1902 nfsm_srvnamesiz(len); 1903 /* 1904 * Remember our original uid so that we can reset cr_uid before 1905 * the second nfs_namei() call, in case it is remapped. 1906 */ 1907 saved_uid = kauth_cred_geteuid(cred); 1908 fromnd.ni_cnd.cn_cred = cred; 1909 fromnd.ni_cnd.cn_nameiop = DELETE; 1910 fromnd.ni_cnd.cn_flags = WANTPARENT | SAVESTART; 1911 error = nfs_namei(&fromnd, ffhp, len, slp, nam, &md, 1912 &dpos, &fdirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1913 if (fdirp) { 1914 if (v3) 1915 fdirfor_ret = VOP_GETATTR(fdirp, &fdirfor, cred, lwp); 1916 else { 1917 vrele(fdirp); 1918 fdirp = (struct vnode *)0; 1919 } 1920 } 1921 if (error) { 1922 nfsm_reply(2 * NFSX_WCCDATA(v3)); 1923 nfsm_srvwcc_data(fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft); 1924 nfsm_srvwcc_data(tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft); 1925 if (fdirp) 1926 vrele(fdirp); 1927 vn_finished_write(mp, 0); 1928 return (0); 1929 } 1930 fvp = fromnd.ni_vp; 1931 nfsm_srvmtofh(tfhp); 1932 if (v3) { 1933 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 1934 len2 = fxdr_unsigned(uint32_t, *tl); 1935 /* len2 will be checked by nfs_namei */ 1936 } 1937 else { 1938 /* NFSv2 */ 1939 nfsm_strsiz(len2, NFS_MAXNAMLEN); 1940 } 1941 kauth_cred_seteuid(cred, saved_uid); 1942 tond.ni_cnd.cn_cred = cred; 1943 tond.ni_cnd.cn_nameiop = RENAME; 1944 tond.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF | NOCACHE | SAVESTART; 1945 error = nfs_namei(&tond, tfhp, len2, slp, nam, &md, 1946 &dpos, &tdirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1947 if (tdirp) { 1948 if (v3) 1949 tdirfor_ret = VOP_GETATTR(tdirp, &tdirfor, cred, lwp); 1950 else { 1951 vrele(tdirp); 1952 tdirp = (struct vnode *)0; 1953 } 1954 } 1955 if (error) { 1956 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 1957 vrele(fromnd.ni_dvp); 1958 vrele(fvp); 1959 goto out1; 1960 } 1961 tdvp = tond.ni_dvp; 1962 tvp = tond.ni_vp; 1963 if (tvp != NULL) { 1964 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 1965 if (v3) 1966 error = EEXIST; 1967 else 1968 error = EISDIR; 1969 goto out; 1970 } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 1971 if (v3) 1972 error = EEXIST; 1973 else 1974 error = ENOTDIR; 1975 goto out; 1976 } 1977 if (tvp->v_type == VDIR && tvp->v_mountedhere) { 1978 if (v3) 1979 error = EXDEV; 1980 else 1981 error = ENOTEMPTY; 1982 goto out; 1983 } 1984 } 1985 if (fvp->v_type == VDIR && fvp->v_mountedhere) { 1986 if (v3) 1987 error = EXDEV; 1988 else 1989 error = ENOTEMPTY; 1990 goto out; 1991 } 1992 if (fvp->v_mount != tdvp->v_mount) { 1993 if (v3) 1994 error = EXDEV; 1995 else 1996 error = ENOTEMPTY; 1997 goto out; 1998 } 1999 if (fvp == tdvp) { 2000 if (v3) 2001 error = EINVAL; 2002 else 2003 error = ENOTEMPTY; 2004 } 2005 /* 2006 * If source is the same as the destination (that is the 2007 * same vnode with the same name in the same directory), 2008 * then there is nothing to do. 2009 */ 2010 if (fvp == tvp && fromnd.ni_dvp == tdvp && 2011 fromnd.ni_cnd.cn_namelen == tond.ni_cnd.cn_namelen && 2012 !memcmp(fromnd.ni_cnd.cn_nameptr, tond.ni_cnd.cn_nameptr, 2013 fromnd.ni_cnd.cn_namelen)) 2014 error = -1; 2015 out: 2016 if (!error) { 2017 nqsrv_getl(fromnd.ni_dvp, ND_WRITE); 2018 nqsrv_getl(tdvp, ND_WRITE); 2019 if (tvp) { 2020 nqsrv_getl(tvp, ND_WRITE); 2021 } 2022 error = VOP_RENAME(fromnd.ni_dvp, fromnd.ni_vp, &fromnd.ni_cnd, 2023 tond.ni_dvp, tond.ni_vp, &tond.ni_cnd); 2024 } else { 2025 VOP_ABORTOP(tond.ni_dvp, &tond.ni_cnd); 2026 if (tdvp == tvp) 2027 vrele(tdvp); 2028 else 2029 vput(tdvp); 2030 if (tvp) 2031 vput(tvp); 2032 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 2033 vrele(fromnd.ni_dvp); 2034 vrele(fvp); 2035 if (error == -1) 2036 error = 0; 2037 } 2038 vrele(tond.ni_startdir); 2039 PNBUF_PUT(tond.ni_cnd.cn_pnbuf); 2040 out1: 2041 if (fdirp) { 2042 fdiraft_ret = VOP_GETATTR(fdirp, &fdiraft, cred, lwp); 2043 vrele(fdirp); 2044 } 2045 if (tdirp) { 2046 tdiraft_ret = VOP_GETATTR(tdirp, &tdiraft, cred, lwp); 2047 vrele(tdirp); 2048 } 2049 vrele(fromnd.ni_startdir); 2050 PNBUF_PUT(fromnd.ni_cnd.cn_pnbuf); 2051 nfsm_reply(2 * NFSX_WCCDATA(v3)); 2052 if (v3) { 2053 nfsm_srvwcc_data(fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft); 2054 nfsm_srvwcc_data(tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft); 2055 } 2056 vn_finished_write(mp, 0); 2057 return (0); 2058 2059 nfsmout: 2060 if (fdirp) 2061 vrele(fdirp); 2062 #ifdef notdef 2063 if (tdirp) 2064 vrele(tdirp); 2065 #endif 2066 if (tond.ni_cnd.cn_nameiop) { 2067 vrele(tond.ni_startdir); 2068 PNBUF_PUT(tond.ni_cnd.cn_pnbuf); 2069 } 2070 if (fromnd.ni_cnd.cn_nameiop) { 2071 vrele(fromnd.ni_startdir); 2072 PNBUF_PUT(fromnd.ni_cnd.cn_pnbuf); 2073 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 2074 vrele(fromnd.ni_dvp); 2075 vrele(fvp); 2076 } 2077 return (error); 2078 } 2079 2080 /* 2081 * nfs link service 2082 */ 2083 int 2084 nfsrv_link(nfsd, slp, lwp, mrq) 2085 struct nfsrv_descript *nfsd; 2086 struct nfssvc_sock *slp; 2087 struct lwp *lwp; 2088 struct mbuf **mrq; 2089 { 2090 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2091 struct mbuf *nam = nfsd->nd_nam; 2092 caddr_t dpos = nfsd->nd_dpos; 2093 kauth_cred_t cred = nfsd->nd_cr; 2094 struct nameidata nd; 2095 u_int32_t *tl; 2096 int32_t t1; 2097 caddr_t bpos; 2098 int error = 0, rdonly, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 2099 int getret = 1, v3 = (nfsd->nd_flag & ND_NFSV3); 2100 char *cp2; 2101 struct mbuf *mb, *mreq; 2102 struct vnode *vp, *xp, *dirp = (struct vnode *)0; 2103 struct vattr dirfor, diraft, at; 2104 nfsfh_t nfh, dnfh; 2105 fhandle_t *fhp, *dfhp; 2106 u_quad_t frev; 2107 struct mount *mp = NULL; 2108 2109 fhp = &nfh.fh_generic; 2110 dfhp = &dnfh.fh_generic; 2111 nfsm_srvmtofh(fhp); 2112 if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) 2113 return (ESTALE); 2114 vn_start_write(NULL, &mp, V_WAIT); 2115 nfsm_srvmtofh(dfhp); 2116 nfsm_srvnamesiz(len); 2117 error = nfsrv_fhtovp(fhp, FALSE, &vp, cred, slp, nam, 2118 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2119 if (error) { 2120 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2121 nfsm_srvpostop_attr(getret, &at); 2122 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2123 vn_finished_write(mp, 0); 2124 return (0); 2125 } 2126 if (vp->v_type == VDIR && (error = kauth_authorize_generic(cred, 2127 KAUTH_GENERIC_ISSUSER, (u_short *)0)) != 0) 2128 goto out1; 2129 nd.ni_cnd.cn_cred = cred; 2130 nd.ni_cnd.cn_nameiop = CREATE; 2131 nd.ni_cnd.cn_flags = LOCKPARENT; 2132 error = nfs_namei(&nd, dfhp, len, slp, nam, &md, &dpos, 2133 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2134 if (dirp) { 2135 if (v3) 2136 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, lwp); 2137 else { 2138 vrele(dirp); 2139 dirp = (struct vnode *)0; 2140 } 2141 } 2142 if (error) 2143 goto out1; 2144 xp = nd.ni_vp; 2145 if (xp != NULL) { 2146 error = EEXIST; 2147 goto out; 2148 } 2149 xp = nd.ni_dvp; 2150 if (vp->v_mount != xp->v_mount) 2151 error = EXDEV; 2152 out: 2153 if (!error) { 2154 nqsrv_getl(vp, ND_WRITE); 2155 nqsrv_getl(xp, ND_WRITE); 2156 error = VOP_LINK(nd.ni_dvp, vp, &nd.ni_cnd); 2157 } else { 2158 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2159 if (nd.ni_dvp == nd.ni_vp) 2160 vrele(nd.ni_dvp); 2161 else 2162 vput(nd.ni_dvp); 2163 if (nd.ni_vp) 2164 vrele(nd.ni_vp); 2165 } 2166 out1: 2167 if (v3) 2168 getret = VOP_GETATTR(vp, &at, cred, lwp); 2169 if (dirp) { 2170 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, lwp); 2171 vrele(dirp); 2172 } 2173 vrele(vp); 2174 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2175 if (v3) { 2176 nfsm_srvpostop_attr(getret, &at); 2177 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2178 vn_finished_write(mp, 0); 2179 return (0); 2180 } 2181 vn_finished_write(mp, 0); 2182 nfsm_srvdone; 2183 } 2184 2185 /* 2186 * nfs symbolic link service 2187 */ 2188 int 2189 nfsrv_symlink(nfsd, slp, lwp, mrq) 2190 struct nfsrv_descript *nfsd; 2191 struct nfssvc_sock *slp; 2192 struct lwp *lwp; 2193 struct mbuf **mrq; 2194 { 2195 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2196 struct mbuf *nam = nfsd->nd_nam; 2197 caddr_t dpos = nfsd->nd_dpos; 2198 kauth_cred_t cred = nfsd->nd_cr; 2199 struct vattr va, dirfor, diraft; 2200 struct nameidata nd; 2201 u_int32_t *tl; 2202 int32_t t1; 2203 struct nfsv2_sattr *sp; 2204 char *bpos, *pathcp = NULL, *cp2; 2205 struct uio io; 2206 struct iovec iv; 2207 int error = 0, cache = 0, dirfor_ret = 1, diraft_ret = 1; 2208 uint32_t len, len2; 2209 int v3 = (nfsd->nd_flag & ND_NFSV3); 2210 struct mbuf *mb, *mreq; 2211 struct vnode *dirp = (struct vnode *)0; 2212 nfsfh_t nfh; 2213 fhandle_t *fhp; 2214 size_t fh_size; 2215 u_quad_t frev; 2216 struct mount *mp = NULL; 2217 2218 nd.ni_cnd.cn_nameiop = 0; 2219 fhp = &nfh.fh_generic; 2220 fh_size = NFS_SMALLFH; 2221 nfsm_srvmtofh(fhp); 2222 if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) 2223 return (ESTALE); 2224 vn_start_write(NULL, &mp, V_WAIT); 2225 nfsm_srvnamesiz(len); 2226 nd.ni_cnd.cn_cred = cred; 2227 nd.ni_cnd.cn_nameiop = CREATE; 2228 nd.ni_cnd.cn_flags = LOCKPARENT; 2229 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 2230 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2231 if (dirp) { 2232 if (v3) 2233 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, lwp); 2234 else { 2235 vrele(dirp); 2236 dirp = (struct vnode *)0; 2237 } 2238 } 2239 if (error) 2240 goto out; 2241 VATTR_NULL(&va); 2242 va.va_type = VLNK; 2243 if (v3) { 2244 va.va_mode = 0; 2245 nfsm_srvsattr(&va); 2246 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 2247 len2 = fxdr_unsigned(uint32_t, *tl); 2248 if (len2 > PATH_MAX) { 2249 /* XXX should check _PC_NO_TRUNC */ 2250 error = ENAMETOOLONG; 2251 goto abortop; 2252 } 2253 } 2254 else { 2255 /* NFSv2 */ 2256 nfsm_strsiz(len2, NFS_MAXPATHLEN); 2257 } 2258 pathcp = malloc(len2 + 1, M_TEMP, M_WAITOK); 2259 iv.iov_base = pathcp; 2260 iv.iov_len = len2; 2261 io.uio_resid = len2; 2262 io.uio_offset = 0; 2263 io.uio_iov = &iv; 2264 io.uio_iovcnt = 1; 2265 io.uio_rw = UIO_READ; 2266 UIO_SETUP_SYSSPACE(&io); 2267 nfsm_mtouio(&io, len2); 2268 if (!v3) { 2269 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2270 va.va_mode = fxdr_unsigned(u_int16_t, sp->sa_mode); 2271 } 2272 *(pathcp + len2) = '\0'; 2273 if (nd.ni_vp) { 2274 error = EEXIST; 2275 abortop: 2276 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2277 if (nd.ni_dvp == nd.ni_vp) 2278 vrele(nd.ni_dvp); 2279 else 2280 vput(nd.ni_dvp); 2281 if (nd.ni_vp) 2282 vrele(nd.ni_vp); 2283 goto out; 2284 } 2285 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2286 error = VOP_SYMLINK(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va, pathcp); 2287 if (!error) { 2288 if (v3) { 2289 error = vfs_composefh(nd.ni_vp, fhp, &fh_size); 2290 if (!error) 2291 error = VOP_GETATTR(nd.ni_vp, &va, cred, lwp); 2292 vput(nd.ni_vp); 2293 } else { 2294 vput(nd.ni_vp); 2295 } 2296 } 2297 out: 2298 if (pathcp) 2299 free(pathcp, M_TEMP); 2300 if (dirp) { 2301 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, lwp); 2302 vrele(dirp); 2303 } 2304 nfsm_reply(NFSX_SRVFH(v3) + NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2305 if (v3) { 2306 if (!error) { 2307 nfsm_srvpostop_fh(fhp); 2308 nfsm_srvpostop_attr(0, &va); 2309 } 2310 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2311 } 2312 vn_finished_write(mp, 0); 2313 return (0); 2314 nfsmout: 2315 if (dirp) 2316 vrele(dirp); 2317 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2318 if (nd.ni_dvp == nd.ni_vp) 2319 vrele(nd.ni_dvp); 2320 else 2321 vput(nd.ni_dvp); 2322 if (nd.ni_vp) 2323 vrele(nd.ni_vp); 2324 if (pathcp) 2325 free(pathcp, M_TEMP); 2326 vn_finished_write(mp, 0); 2327 return (error); 2328 } 2329 2330 /* 2331 * nfs mkdir service 2332 */ 2333 int 2334 nfsrv_mkdir(nfsd, slp, lwp, mrq) 2335 struct nfsrv_descript *nfsd; 2336 struct nfssvc_sock *slp; 2337 struct lwp *lwp; 2338 struct mbuf **mrq; 2339 { 2340 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2341 struct mbuf *nam = nfsd->nd_nam; 2342 caddr_t dpos = nfsd->nd_dpos; 2343 kauth_cred_t cred = nfsd->nd_cr; 2344 struct vattr va, dirfor, diraft; 2345 struct nfs_fattr *fp; 2346 struct nameidata nd; 2347 caddr_t cp; 2348 u_int32_t *tl; 2349 int32_t t1; 2350 caddr_t bpos; 2351 int error = 0, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 2352 int v3 = (nfsd->nd_flag & ND_NFSV3); 2353 char *cp2; 2354 struct mbuf *mb, *mreq; 2355 struct vnode *vp, *dirp = (struct vnode *)0; 2356 nfsfh_t nfh; 2357 fhandle_t *fhp; 2358 size_t fh_size; 2359 u_quad_t frev; 2360 struct mount *mp = NULL; 2361 2362 fhp = &nfh.fh_generic; 2363 fh_size = NFS_SMALLFH; 2364 nfsm_srvmtofh(fhp); 2365 if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) 2366 return (ESTALE); 2367 vn_start_write(NULL, &mp, V_WAIT); 2368 nfsm_srvnamesiz(len); 2369 nd.ni_cnd.cn_cred = cred; 2370 nd.ni_cnd.cn_nameiop = CREATE; 2371 nd.ni_cnd.cn_flags = LOCKPARENT; 2372 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 2373 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2374 if (dirp) { 2375 if (v3) 2376 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, lwp); 2377 else { 2378 vrele(dirp); 2379 dirp = (struct vnode *)0; 2380 } 2381 } 2382 if (error) { 2383 nfsm_reply(NFSX_WCCDATA(v3)); 2384 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2385 if (dirp) 2386 vrele(dirp); 2387 vn_finished_write(mp, 0); 2388 return (0); 2389 } 2390 VATTR_NULL(&va); 2391 if (v3) { 2392 va.va_mode = 0; 2393 nfsm_srvsattr(&va); 2394 } else { 2395 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2396 va.va_mode = nfstov_mode(*tl++); 2397 } 2398 va.va_type = VDIR; 2399 vp = nd.ni_vp; 2400 if (vp != NULL) { 2401 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2402 if (nd.ni_dvp == vp) 2403 vrele(nd.ni_dvp); 2404 else 2405 vput(nd.ni_dvp); 2406 vrele(vp); 2407 error = EEXIST; 2408 goto out; 2409 } 2410 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2411 error = VOP_MKDIR(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 2412 if (!error) { 2413 vp = nd.ni_vp; 2414 error = vfs_composefh(vp, fhp, &fh_size); 2415 if (!error) 2416 error = VOP_GETATTR(vp, &va, cred, lwp); 2417 vput(vp); 2418 } 2419 out: 2420 if (dirp) { 2421 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, lwp); 2422 vrele(dirp); 2423 } 2424 nfsm_reply(NFSX_SRVFH(v3) + NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2425 if (v3) { 2426 if (!error) { 2427 nfsm_srvpostop_fh(fhp); 2428 nfsm_srvpostop_attr(0, &va); 2429 } 2430 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2431 } else { 2432 nfsm_srvfhtom(fhp, v3); 2433 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 2434 nfsm_srvfillattr(&va, fp); 2435 } 2436 vn_finished_write(mp, 0); 2437 return (0); 2438 nfsmout: 2439 if (dirp) 2440 vrele(dirp); 2441 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2442 if (nd.ni_dvp == nd.ni_vp) 2443 vrele(nd.ni_dvp); 2444 else 2445 vput(nd.ni_dvp); 2446 if (nd.ni_vp) 2447 vrele(nd.ni_vp); 2448 vn_finished_write(mp, 0); 2449 return (error); 2450 } 2451 2452 /* 2453 * nfs rmdir service 2454 */ 2455 int 2456 nfsrv_rmdir(nfsd, slp, lwp, mrq) 2457 struct nfsrv_descript *nfsd; 2458 struct nfssvc_sock *slp; 2459 struct lwp *lwp; 2460 struct mbuf **mrq; 2461 { 2462 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2463 struct mbuf *nam = nfsd->nd_nam; 2464 caddr_t dpos = nfsd->nd_dpos; 2465 kauth_cred_t cred = nfsd->nd_cr; 2466 u_int32_t *tl; 2467 int32_t t1; 2468 caddr_t bpos; 2469 int error = 0, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 2470 int v3 = (nfsd->nd_flag & ND_NFSV3); 2471 char *cp2; 2472 struct mbuf *mb, *mreq; 2473 struct vnode *vp, *dirp = (struct vnode *)0; 2474 struct vattr dirfor, diraft; 2475 nfsfh_t nfh; 2476 fhandle_t *fhp; 2477 struct nameidata nd; 2478 u_quad_t frev; 2479 struct mount *mp = NULL; 2480 2481 fhp = &nfh.fh_generic; 2482 nfsm_srvmtofh(fhp); 2483 if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) 2484 return (ESTALE); 2485 vn_start_write(NULL, &mp, V_WAIT); 2486 nfsm_srvnamesiz(len); 2487 nd.ni_cnd.cn_cred = cred; 2488 nd.ni_cnd.cn_nameiop = DELETE; 2489 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 2490 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 2491 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2492 if (dirp) { 2493 if (v3) 2494 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, lwp); 2495 else { 2496 vrele(dirp); 2497 dirp = (struct vnode *)0; 2498 } 2499 } 2500 if (error) { 2501 nfsm_reply(NFSX_WCCDATA(v3)); 2502 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2503 if (dirp) 2504 vrele(dirp); 2505 vn_finished_write(mp, 0); 2506 return (0); 2507 } 2508 vp = nd.ni_vp; 2509 if (vp->v_type != VDIR) { 2510 error = ENOTDIR; 2511 goto out; 2512 } 2513 /* 2514 * No rmdir "." please. 2515 */ 2516 if (nd.ni_dvp == vp) { 2517 error = EINVAL; 2518 goto out; 2519 } 2520 /* 2521 * The root of a mounted filesystem cannot be deleted. 2522 */ 2523 if (vp->v_flag & VROOT) 2524 error = EBUSY; 2525 out: 2526 if (!error) { 2527 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2528 nqsrv_getl(vp, ND_WRITE); 2529 error = VOP_RMDIR(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); 2530 } else { 2531 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2532 if (nd.ni_dvp == nd.ni_vp) 2533 vrele(nd.ni_dvp); 2534 else 2535 vput(nd.ni_dvp); 2536 vput(vp); 2537 } 2538 if (dirp) { 2539 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, lwp); 2540 vrele(dirp); 2541 } 2542 nfsm_reply(NFSX_WCCDATA(v3)); 2543 if (v3) { 2544 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2545 vn_finished_write(mp, 0); 2546 return (0); 2547 } 2548 vn_finished_write(mp, 0); 2549 nfsm_srvdone; 2550 } 2551 2552 /* 2553 * nfs readdir service 2554 * - mallocs what it thinks is enough to read 2555 * count rounded up to a multiple of NFS_SRVDIRBLKSIZ <= NFS_MAXREADDIR 2556 * - calls VOP_READDIR() 2557 * - loops around building the reply 2558 * if the output generated exceeds count break out of loop 2559 * The nfsm_clget macro is used here so that the reply will be packed 2560 * tightly in mbuf clusters. 2561 * - it only knows that it has encountered eof when the VOP_READDIR() 2562 * reads nothing 2563 * - as such one readdir rpc will return eof false although you are there 2564 * and then the next will return eof 2565 * - it trims out records with d_fileno == 0 2566 * this doesn't matter for Unix clients, but they might confuse clients 2567 * for other os'. 2568 * - it trims out records with d_type == DT_WHT 2569 * these cannot be seen through NFS (unless we extend the protocol) 2570 * NB: It is tempting to set eof to true if the VOP_READDIR() reads less 2571 * than requested, but this may not apply to all filesystems. For 2572 * example, client NFS does not { although it is never remote mounted 2573 * anyhow } 2574 * The alternate call nfsrv_readdirplus() does lookups as well. 2575 * PS: The NFS protocol spec. does not clarify what the "count" byte 2576 * argument is a count of.. just name strings and file id's or the 2577 * entire reply rpc or ... 2578 * I tried just file name and id sizes and it confused the Sun client, 2579 * so I am using the full rpc size now. The "paranoia.." comment refers 2580 * to including the status longwords that are not a part of the dir. 2581 * "entry" structures, but are in the rpc. 2582 */ 2583 2584 #define NFS_SRVDIRBLKSIZ 1024 2585 2586 struct flrep { 2587 nfsuint64 fl_off; 2588 u_int32_t fl_postopok; 2589 u_int32_t fl_fattr[NFSX_V3FATTR / sizeof (u_int32_t)]; 2590 u_int32_t fl_fhok; 2591 u_int32_t fl_fhsize; 2592 u_int32_t fl_nfh[NFSX_V3FH / sizeof (u_int32_t)]; 2593 }; 2594 2595 int 2596 nfsrv_readdir(nfsd, slp, lwp, mrq) 2597 struct nfsrv_descript *nfsd; 2598 struct nfssvc_sock *slp; 2599 struct lwp *lwp; 2600 struct mbuf **mrq; 2601 { 2602 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2603 struct mbuf *nam = nfsd->nd_nam; 2604 caddr_t dpos = nfsd->nd_dpos; 2605 kauth_cred_t cred = nfsd->nd_cr; 2606 char *bp, *be; 2607 struct mbuf *mp; 2608 struct dirent *dp; 2609 caddr_t cp; 2610 u_int32_t *tl; 2611 int32_t t1; 2612 caddr_t bpos; 2613 struct mbuf *mb, *mreq, *mp2; 2614 char *cpos, *cend, *cp2, *rbuf; 2615 struct vnode *vp; 2616 struct vattr at; 2617 nfsfh_t nfh; 2618 fhandle_t *fhp; 2619 struct uio io; 2620 struct iovec iv; 2621 int len, nlen, rem, xfer, tsiz, i, error = 0, getret = 1; 2622 int siz, cnt, fullsiz, eofflag, rdonly, cache = 0, ncookies; 2623 int v3 = (nfsd->nd_flag & ND_NFSV3); 2624 u_quad_t frev, off, toff, verf; 2625 off_t *cookies = NULL, *cookiep; 2626 nfsuint64 jar; 2627 2628 fhp = &nfh.fh_generic; 2629 nfsm_srvmtofh(fhp); 2630 if (v3) { 2631 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 2632 toff = fxdr_hyper(tl); 2633 tl += 2; 2634 verf = fxdr_hyper(tl); 2635 tl += 2; 2636 } else { 2637 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2638 toff = fxdr_unsigned(u_quad_t, *tl++); 2639 } 2640 off = toff; 2641 cnt = fxdr_unsigned(int, *tl); 2642 siz = ((cnt + NFS_SRVDIRBLKSIZ - 1) & ~(NFS_SRVDIRBLKSIZ - 1)); 2643 xfer = NFS_SRVMAXDATA(nfsd); 2644 if (siz > xfer) 2645 siz = xfer; 2646 fullsiz = siz; 2647 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 2648 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2649 if (!error && vp->v_type != VDIR) { 2650 error = ENOTDIR; 2651 vput(vp); 2652 } 2653 if (error) { 2654 nfsm_reply(NFSX_UNSIGNED); 2655 nfsm_srvpostop_attr(getret, &at); 2656 return (0); 2657 } 2658 nqsrv_getl(vp, ND_READ); 2659 if (v3) { 2660 error = getret = VOP_GETATTR(vp, &at, cred, lwp); 2661 #ifdef NFS3_STRICTVERF 2662 /* 2663 * XXX This check is too strict for Solaris 2.5 clients. 2664 */ 2665 if (!error && toff && verf != at.va_filerev) 2666 error = NFSERR_BAD_COOKIE; 2667 #endif 2668 } 2669 if (!error) 2670 error = nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 0); 2671 if (error) { 2672 vput(vp); 2673 nfsm_reply(NFSX_POSTOPATTR(v3)); 2674 nfsm_srvpostop_attr(getret, &at); 2675 return (0); 2676 } 2677 VOP_UNLOCK(vp, 0); 2678 rbuf = malloc(siz, M_TEMP, M_WAITOK); 2679 again: 2680 iv.iov_base = rbuf; 2681 iv.iov_len = fullsiz; 2682 io.uio_iov = &iv; 2683 io.uio_iovcnt = 1; 2684 io.uio_offset = (off_t)off; 2685 io.uio_resid = fullsiz; 2686 io.uio_rw = UIO_READ; 2687 UIO_SETUP_SYSSPACE(&io); 2688 eofflag = 0; 2689 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2690 2691 error = VOP_READDIR(vp, &io, cred, &eofflag, &cookies, &ncookies); 2692 2693 off = (off_t)io.uio_offset; 2694 if (!cookies && !error) 2695 error = NFSERR_PERM; 2696 if (v3) { 2697 getret = VOP_GETATTR(vp, &at, cred, lwp); 2698 if (!error) 2699 error = getret; 2700 } 2701 2702 VOP_UNLOCK(vp, 0); 2703 if (error) { 2704 vrele(vp); 2705 free((caddr_t)rbuf, M_TEMP); 2706 if (cookies) 2707 free((caddr_t)cookies, M_TEMP); 2708 nfsm_reply(NFSX_POSTOPATTR(v3)); 2709 nfsm_srvpostop_attr(getret, &at); 2710 return (0); 2711 } 2712 if (io.uio_resid) { 2713 siz -= io.uio_resid; 2714 2715 /* 2716 * If nothing read, return eof 2717 * rpc reply 2718 */ 2719 if (siz == 0) { 2720 vrele(vp); 2721 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_COOKIEVERF(v3) + 2722 2 * NFSX_UNSIGNED); 2723 if (v3) { 2724 nfsm_srvpostop_attr(getret, &at); 2725 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 2726 txdr_hyper(at.va_filerev, tl); 2727 tl += 2; 2728 } else 2729 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2730 *tl++ = nfs_false; 2731 *tl = nfs_true; 2732 free((caddr_t)rbuf, M_TEMP); 2733 free((caddr_t)cookies, M_TEMP); 2734 return (0); 2735 } 2736 } 2737 2738 /* 2739 * Check for degenerate cases of nothing useful read. 2740 * If so go try again 2741 */ 2742 cpos = rbuf; 2743 cend = rbuf + siz; 2744 dp = (struct dirent *)cpos; 2745 cookiep = cookies; 2746 2747 while (cpos < cend && ncookies > 0 && 2748 (dp->d_fileno == 0 || dp->d_type == DT_WHT)) { 2749 cpos += dp->d_reclen; 2750 dp = (struct dirent *)cpos; 2751 cookiep++; 2752 ncookies--; 2753 } 2754 if (cpos >= cend || ncookies == 0) { 2755 toff = off; 2756 siz = fullsiz; 2757 free(cookies, M_TEMP); 2758 goto again; 2759 } 2760 2761 len = 3 * NFSX_UNSIGNED; /* paranoia, probably can be 0 */ 2762 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_COOKIEVERF(v3) + siz); 2763 if (v3) { 2764 nfsm_srvpostop_attr(getret, &at); 2765 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2766 txdr_hyper(at.va_filerev, tl); 2767 } 2768 mp = mp2 = mb; 2769 bp = bpos; 2770 be = bp + M_TRAILINGSPACE(mp); 2771 2772 /* Loop through the records and build reply */ 2773 while (cpos < cend && ncookies > 0) { 2774 if (dp->d_fileno != 0 && dp->d_type != DT_WHT) { 2775 nlen = dp->d_namlen; 2776 rem = nfsm_rndup(nlen)-nlen; 2777 len += (4 * NFSX_UNSIGNED + nlen + rem); 2778 if (v3) 2779 len += 2 * NFSX_UNSIGNED; 2780 if (len > cnt) { 2781 eofflag = 0; 2782 break; 2783 } 2784 /* 2785 * Build the directory record xdr from 2786 * the dirent entry. 2787 */ 2788 nfsm_clget; 2789 *tl = nfs_true; 2790 bp += NFSX_UNSIGNED; 2791 if (v3) { 2792 nfsm_clget; 2793 *tl = txdr_unsigned(dp->d_fileno >> 32); 2794 bp += NFSX_UNSIGNED; 2795 } 2796 nfsm_clget; 2797 *tl = txdr_unsigned(dp->d_fileno); 2798 bp += NFSX_UNSIGNED; 2799 nfsm_clget; 2800 *tl = txdr_unsigned(nlen); 2801 bp += NFSX_UNSIGNED; 2802 2803 /* And loop around copying the name */ 2804 xfer = nlen; 2805 cp = dp->d_name; 2806 while (xfer > 0) { 2807 nfsm_clget; 2808 if ((bp+xfer) > be) 2809 tsiz = be-bp; 2810 else 2811 tsiz = xfer; 2812 memcpy(bp, cp, tsiz); 2813 bp += tsiz; 2814 xfer -= tsiz; 2815 if (xfer > 0) 2816 cp += tsiz; 2817 } 2818 /* And null pad to an int32_t boundary */ 2819 for (i = 0; i < rem; i++) 2820 *bp++ = '\0'; 2821 nfsm_clget; 2822 2823 /* Finish off the record */ 2824 txdr_hyper(*cookiep, &jar); 2825 if (v3) { 2826 *tl = jar.nfsuquad[0]; 2827 bp += NFSX_UNSIGNED; 2828 nfsm_clget; 2829 } 2830 *tl = jar.nfsuquad[1]; 2831 bp += NFSX_UNSIGNED; 2832 } 2833 cpos += dp->d_reclen; 2834 dp = (struct dirent *)cpos; 2835 cookiep++; 2836 ncookies--; 2837 } 2838 vrele(vp); 2839 nfsm_clget; 2840 *tl = nfs_false; 2841 bp += NFSX_UNSIGNED; 2842 nfsm_clget; 2843 if (eofflag) 2844 *tl = nfs_true; 2845 else 2846 *tl = nfs_false; 2847 bp += NFSX_UNSIGNED; 2848 if (mp != mb) { 2849 if (bp < be) 2850 mp->m_len = bp - mtod(mp, caddr_t); 2851 } else 2852 mp->m_len += bp - bpos; 2853 free((caddr_t)rbuf, M_TEMP); 2854 free((caddr_t)cookies, M_TEMP); 2855 nfsm_srvdone; 2856 } 2857 2858 int 2859 nfsrv_readdirplus(nfsd, slp, lwp, mrq) 2860 struct nfsrv_descript *nfsd; 2861 struct nfssvc_sock *slp; 2862 struct lwp *lwp; 2863 struct mbuf **mrq; 2864 { 2865 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2866 struct mbuf *nam = nfsd->nd_nam; 2867 caddr_t dpos = nfsd->nd_dpos; 2868 kauth_cred_t cred = nfsd->nd_cr; 2869 char *bp, *be; 2870 struct mbuf *mp; 2871 struct dirent *dp; 2872 caddr_t cp; 2873 u_int32_t *tl; 2874 int32_t t1; 2875 caddr_t bpos; 2876 struct mbuf *mb, *mreq, *mp2; 2877 char *cpos, *cend, *cp2, *rbuf; 2878 struct vnode *vp, *nvp; 2879 struct flrep fl; 2880 nfsfh_t nfh; 2881 fhandle_t *fhp, *nfhp = (fhandle_t *)fl.fl_nfh; 2882 size_t fh_size = sizeof(fl.fl_nfh); 2883 struct uio io; 2884 struct iovec iv; 2885 struct vattr va, at, *vap = &va; 2886 struct nfs_fattr *fp; 2887 int len, nlen, rem, xfer, tsiz, i, error = 0, getret = 1; 2888 int siz, cnt, fullsiz, eofflag, rdonly, cache = 0, dirlen, ncookies; 2889 u_quad_t frev, off, toff, verf; 2890 off_t *cookies = NULL, *cookiep; 2891 2892 fhp = &nfh.fh_generic; 2893 nfsm_srvmtofh(fhp); 2894 nfsm_dissect(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 2895 toff = fxdr_hyper(tl); 2896 tl += 2; 2897 verf = fxdr_hyper(tl); 2898 tl += 2; 2899 siz = fxdr_unsigned(int, *tl++); 2900 cnt = fxdr_unsigned(int, *tl); 2901 off = toff; 2902 siz = ((siz + NFS_SRVDIRBLKSIZ - 1) & ~(NFS_SRVDIRBLKSIZ - 1)); 2903 xfer = NFS_SRVMAXDATA(nfsd); 2904 if (siz > xfer) 2905 siz = xfer; 2906 fullsiz = siz; 2907 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 2908 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2909 if (!error && vp->v_type != VDIR) { 2910 error = ENOTDIR; 2911 vput(vp); 2912 } 2913 if (error) { 2914 nfsm_reply(NFSX_UNSIGNED); 2915 nfsm_srvpostop_attr(getret, &at); 2916 return (0); 2917 } 2918 error = getret = VOP_GETATTR(vp, &at, cred, lwp); 2919 #ifdef NFS3_STRICTVERF 2920 /* 2921 * XXX This check is too strict for Solaris 2.5 clients. 2922 */ 2923 if (!error && toff && verf != at.va_filerev) 2924 error = NFSERR_BAD_COOKIE; 2925 #endif 2926 if (!error) { 2927 nqsrv_getl(vp, ND_READ); 2928 error = nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 0); 2929 } 2930 if (error) { 2931 vput(vp); 2932 nfsm_reply(NFSX_V3POSTOPATTR); 2933 nfsm_srvpostop_attr(getret, &at); 2934 return (0); 2935 } 2936 VOP_UNLOCK(vp, 0); 2937 2938 rbuf = malloc(siz, M_TEMP, M_WAITOK); 2939 again: 2940 iv.iov_base = rbuf; 2941 iv.iov_len = fullsiz; 2942 io.uio_iov = &iv; 2943 io.uio_iovcnt = 1; 2944 io.uio_offset = (off_t)off; 2945 io.uio_resid = fullsiz; 2946 io.uio_rw = UIO_READ; 2947 UIO_SETUP_SYSSPACE(&io); 2948 eofflag = 0; 2949 2950 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2951 2952 error = VOP_READDIR(vp, &io, cred, &eofflag, &cookies, &ncookies); 2953 2954 off = (u_quad_t)io.uio_offset; 2955 getret = VOP_GETATTR(vp, &at, cred, lwp); 2956 2957 VOP_UNLOCK(vp, 0); 2958 2959 /* 2960 * If the VGET operation doesn't work for this filesystem, 2961 * we can't support readdirplus. Returning NOTSUPP should 2962 * make clients fall back to plain readdir. 2963 * There's no need to check for VPTOFH as well, we wouldn't 2964 * even be here otherwise. 2965 */ 2966 if (!getret) { 2967 if ((getret = VFS_VGET(vp->v_mount, at.va_fileid, &nvp))) 2968 getret = (getret == EOPNOTSUPP) ? 2969 NFSERR_NOTSUPP : NFSERR_IO; 2970 else 2971 vput(nvp); 2972 } 2973 2974 if (!cookies && !error) 2975 error = NFSERR_PERM; 2976 if (!error) 2977 error = getret; 2978 if (error) { 2979 vrele(vp); 2980 if (cookies) 2981 free((caddr_t)cookies, M_TEMP); 2982 free((caddr_t)rbuf, M_TEMP); 2983 nfsm_reply(NFSX_V3POSTOPATTR); 2984 nfsm_srvpostop_attr(getret, &at); 2985 return (0); 2986 } 2987 if (io.uio_resid) { 2988 siz -= io.uio_resid; 2989 2990 /* 2991 * If nothing read, return eof 2992 * rpc reply 2993 */ 2994 if (siz == 0) { 2995 vrele(vp); 2996 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF + 2997 2 * NFSX_UNSIGNED); 2998 nfsm_srvpostop_attr(getret, &at); 2999 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 3000 txdr_hyper(at.va_filerev, tl); 3001 tl += 2; 3002 *tl++ = nfs_false; 3003 *tl = nfs_true; 3004 free((caddr_t)cookies, M_TEMP); 3005 free((caddr_t)rbuf, M_TEMP); 3006 return (0); 3007 } 3008 } 3009 3010 /* 3011 * Check for degenerate cases of nothing useful read. 3012 * If so go try again 3013 */ 3014 cpos = rbuf; 3015 cend = rbuf + siz; 3016 dp = (struct dirent *)cpos; 3017 cookiep = cookies; 3018 3019 while (cpos < cend && ncookies > 0 && 3020 (dp->d_fileno == 0 || dp->d_type == DT_WHT)) { 3021 cpos += dp->d_reclen; 3022 dp = (struct dirent *)cpos; 3023 cookiep++; 3024 ncookies--; 3025 } 3026 if (cpos >= cend || ncookies == 0) { 3027 toff = off; 3028 siz = fullsiz; 3029 free(cookies, M_TEMP); 3030 goto again; 3031 } 3032 3033 dirlen = len = NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF + 2 * NFSX_UNSIGNED; 3034 nfsm_reply(cnt); 3035 nfsm_srvpostop_attr(getret, &at); 3036 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 3037 txdr_hyper(at.va_filerev, tl); 3038 mp = mp2 = mb; 3039 bp = bpos; 3040 be = bp + M_TRAILINGSPACE(mp); 3041 3042 /* Loop through the records and build reply */ 3043 while (cpos < cend && ncookies > 0) { 3044 if (dp->d_fileno != 0 && dp->d_type != DT_WHT) { 3045 nlen = dp->d_namlen; 3046 rem = nfsm_rndup(nlen)-nlen; 3047 3048 /* 3049 * For readdir_and_lookup get the vnode using 3050 * the file number. 3051 */ 3052 if (VFS_VGET(vp->v_mount, dp->d_fileno, &nvp)) 3053 goto invalid; 3054 if (vfs_composefh(nvp, nfhp, &fh_size)) { 3055 vput(nvp); 3056 goto invalid; 3057 } 3058 if (VOP_GETATTR(nvp, vap, cred, lwp)) { 3059 vput(nvp); 3060 goto invalid; 3061 } 3062 vput(nvp); 3063 3064 /* 3065 * If either the dircount or maxcount will be 3066 * exceeded, get out now. Both of these lengths 3067 * are calculated conservatively, including all 3068 * XDR overheads. 3069 */ 3070 len += (8 * NFSX_UNSIGNED + nlen + rem + NFSX_V3FH + 3071 NFSX_V3POSTOPATTR); 3072 dirlen += (6 * NFSX_UNSIGNED + nlen + rem); 3073 if (len > cnt || dirlen > fullsiz) { 3074 eofflag = 0; 3075 break; 3076 } 3077 3078 /* 3079 * Build the directory record xdr from 3080 * the dirent entry. 3081 */ 3082 fp = (struct nfs_fattr *)&fl.fl_fattr; 3083 nfsm_srvfillattr(vap, fp); 3084 fl.fl_fhsize = txdr_unsigned(NFSX_V3FH); 3085 fl.fl_fhok = nfs_true; 3086 fl.fl_postopok = nfs_true; 3087 txdr_hyper(*cookiep, fl.fl_off.nfsuquad); 3088 3089 nfsm_clget; 3090 *tl = nfs_true; 3091 bp += NFSX_UNSIGNED; 3092 nfsm_clget; 3093 *tl = txdr_unsigned(dp->d_fileno >> 32); 3094 bp += NFSX_UNSIGNED; 3095 nfsm_clget; 3096 *tl = txdr_unsigned(dp->d_fileno); 3097 bp += NFSX_UNSIGNED; 3098 nfsm_clget; 3099 *tl = txdr_unsigned(nlen); 3100 bp += NFSX_UNSIGNED; 3101 3102 /* And loop around copying the name */ 3103 xfer = nlen; 3104 cp = dp->d_name; 3105 while (xfer > 0) { 3106 nfsm_clget; 3107 if ((bp + xfer) > be) 3108 tsiz = be - bp; 3109 else 3110 tsiz = xfer; 3111 memcpy(bp, cp, tsiz); 3112 bp += tsiz; 3113 xfer -= tsiz; 3114 if (xfer > 0) 3115 cp += tsiz; 3116 } 3117 /* And null pad to an int32_t boundary */ 3118 for (i = 0; i < rem; i++) 3119 *bp++ = '\0'; 3120 3121 /* 3122 * Now copy the flrep structure out. 3123 */ 3124 xfer = sizeof (struct flrep); 3125 cp = (caddr_t)&fl; 3126 while (xfer > 0) { 3127 nfsm_clget; 3128 if ((bp + xfer) > be) 3129 tsiz = be - bp; 3130 else 3131 tsiz = xfer; 3132 memcpy(bp, cp, tsiz); 3133 bp += tsiz; 3134 xfer -= tsiz; 3135 if (xfer > 0) 3136 cp += tsiz; 3137 } 3138 } 3139 invalid: 3140 cpos += dp->d_reclen; 3141 dp = (struct dirent *)cpos; 3142 cookiep++; 3143 ncookies--; 3144 } 3145 vrele(vp); 3146 nfsm_clget; 3147 *tl = nfs_false; 3148 bp += NFSX_UNSIGNED; 3149 nfsm_clget; 3150 if (eofflag) 3151 *tl = nfs_true; 3152 else 3153 *tl = nfs_false; 3154 bp += NFSX_UNSIGNED; 3155 if (mp != mb) { 3156 if (bp < be) 3157 mp->m_len = bp - mtod(mp, caddr_t); 3158 } else 3159 mp->m_len += bp - bpos; 3160 free((caddr_t)cookies, M_TEMP); 3161 free((caddr_t)rbuf, M_TEMP); 3162 nfsm_srvdone; 3163 } 3164 3165 /* 3166 * nfs commit service 3167 */ 3168 int 3169 nfsrv_commit(nfsd, slp, lwp, mrq) 3170 struct nfsrv_descript *nfsd; 3171 struct nfssvc_sock *slp; 3172 struct lwp *lwp; 3173 struct mbuf **mrq; 3174 { 3175 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3176 struct mbuf *nam = nfsd->nd_nam; 3177 caddr_t dpos = nfsd->nd_dpos; 3178 kauth_cred_t cred = nfsd->nd_cr; 3179 struct vattr bfor, aft; 3180 struct vnode *vp; 3181 nfsfh_t nfh; 3182 fhandle_t *fhp; 3183 u_int32_t *tl; 3184 int32_t t1; 3185 caddr_t bpos; 3186 int error = 0, rdonly, for_ret = 1, aft_ret = 1, cache = 0; 3187 uint32_t cnt; 3188 char *cp2; 3189 struct mbuf *mb, *mreq; 3190 u_quad_t frev, off, end; 3191 struct mount *mp = NULL; 3192 3193 fhp = &nfh.fh_generic; 3194 nfsm_srvmtofh(fhp); 3195 if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) 3196 return (ESTALE); 3197 vn_start_write(NULL, &mp, V_WAIT); 3198 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 3199 3200 off = fxdr_hyper(tl); 3201 tl += 2; 3202 cnt = fxdr_unsigned(uint32_t, *tl); 3203 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 3204 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 3205 if (error) { 3206 nfsm_reply(2 * NFSX_UNSIGNED); 3207 nfsm_srvwcc_data(for_ret, &bfor, aft_ret, &aft); 3208 vn_finished_write(mp, 0); 3209 return (0); 3210 } 3211 for_ret = VOP_GETATTR(vp, &bfor, cred, lwp); 3212 end = (cnt > 0) ? off + cnt : vp->v_size; 3213 if (end < off || end > vp->v_size) 3214 end = vp->v_size; 3215 if (off < vp->v_size) 3216 error = VOP_FSYNC(vp, cred, FSYNC_WAIT, off, end, lwp); 3217 /* else error == 0, from nfsrv_fhtovp() */ 3218 aft_ret = VOP_GETATTR(vp, &aft, cred, lwp); 3219 vput(vp); 3220 nfsm_reply(NFSX_V3WCCDATA + NFSX_V3WRITEVERF); 3221 nfsm_srvwcc_data(for_ret, &bfor, aft_ret, &aft); 3222 if (!error) { 3223 nfsm_build(tl, u_int32_t *, NFSX_V3WRITEVERF); 3224 *tl++ = txdr_unsigned(boottime.tv_sec); 3225 *tl = txdr_unsigned(boottime.tv_usec); 3226 } else { 3227 vn_finished_write(mp, 0); 3228 return (0); 3229 } 3230 vn_finished_write(mp, 0); 3231 nfsm_srvdone; 3232 } 3233 3234 /* 3235 * nfs statfs service 3236 */ 3237 int 3238 nfsrv_statfs(nfsd, slp, lwp, mrq) 3239 struct nfsrv_descript *nfsd; 3240 struct nfssvc_sock *slp; 3241 struct lwp *lwp; 3242 struct mbuf **mrq; 3243 { 3244 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3245 struct mbuf *nam = nfsd->nd_nam; 3246 caddr_t dpos = nfsd->nd_dpos; 3247 kauth_cred_t cred = nfsd->nd_cr; 3248 struct statvfs *sf = NULL; 3249 struct nfs_statfs *sfp; 3250 u_int32_t *tl; 3251 int32_t t1; 3252 caddr_t bpos; 3253 int error = 0, rdonly, cache = 0, getret = 1; 3254 int v3 = (nfsd->nd_flag & ND_NFSV3); 3255 char *cp2; 3256 struct mbuf *mb, *mreq; 3257 struct vnode *vp; 3258 struct vattr at; 3259 nfsfh_t nfh; 3260 fhandle_t *fhp; 3261 u_quad_t frev, tval; 3262 3263 fhp = &nfh.fh_generic; 3264 nfsm_srvmtofh(fhp); 3265 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 3266 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 3267 if (error) { 3268 nfsm_reply(NFSX_UNSIGNED); 3269 nfsm_srvpostop_attr(getret, &at); 3270 return (0); 3271 } 3272 sf = malloc(sizeof(*sf), M_TEMP, M_WAITOK); 3273 error = VFS_STATVFS(vp->v_mount, sf, lwp); 3274 getret = VOP_GETATTR(vp, &at, cred, lwp); 3275 vput(vp); 3276 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_STATFS(v3)); 3277 if (v3) 3278 nfsm_srvpostop_attr(getret, &at); 3279 if (error) { 3280 free(sf, M_TEMP); 3281 return (0); 3282 } 3283 nfsm_build(sfp, struct nfs_statfs *, NFSX_STATFS(v3)); 3284 if (v3) { 3285 tval = (u_quad_t)((quad_t)sf->f_blocks * (quad_t)sf->f_frsize); 3286 txdr_hyper(tval, &sfp->sf_tbytes); 3287 tval = (u_quad_t)((quad_t)sf->f_bfree * (quad_t)sf->f_frsize); 3288 txdr_hyper(tval, &sfp->sf_fbytes); 3289 tval = (u_quad_t)((quad_t)sf->f_bavail * (quad_t)sf->f_frsize); 3290 txdr_hyper(tval, &sfp->sf_abytes); 3291 tval = (u_quad_t)sf->f_files; 3292 txdr_hyper(tval, &sfp->sf_tfiles); 3293 tval = (u_quad_t)sf->f_ffree; 3294 txdr_hyper(tval, &sfp->sf_ffiles); 3295 txdr_hyper(tval, &sfp->sf_afiles); 3296 sfp->sf_invarsec = 0; 3297 } else { 3298 sfp->sf_tsize = txdr_unsigned(NFS_MAXDGRAMDATA); 3299 sfp->sf_bsize = txdr_unsigned(sf->f_frsize); 3300 sfp->sf_blocks = txdr_unsigned(sf->f_blocks); 3301 sfp->sf_bfree = txdr_unsigned(sf->f_bfree); 3302 sfp->sf_bavail = txdr_unsigned(sf->f_bavail); 3303 } 3304 nfsmout: 3305 if (sf) 3306 free(sf, M_TEMP); 3307 return error; 3308 } 3309 3310 /* 3311 * nfs fsinfo service 3312 */ 3313 int 3314 nfsrv_fsinfo(nfsd, slp, lwp, mrq) 3315 struct nfsrv_descript *nfsd; 3316 struct nfssvc_sock *slp; 3317 struct lwp *lwp; 3318 struct mbuf **mrq; 3319 { 3320 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3321 struct mbuf *nam = nfsd->nd_nam; 3322 caddr_t dpos = nfsd->nd_dpos; 3323 kauth_cred_t cred = nfsd->nd_cr; 3324 u_int32_t *tl; 3325 struct nfsv3_fsinfo *sip; 3326 int32_t t1; 3327 caddr_t bpos; 3328 int error = 0, rdonly, cache = 0, getret = 1; 3329 uint32_t maxdata; 3330 char *cp2; 3331 struct mbuf *mb, *mreq; 3332 struct vnode *vp; 3333 struct vattr at; 3334 nfsfh_t nfh; 3335 fhandle_t *fhp; 3336 u_quad_t frev, maxfsize; 3337 struct statvfs *sb; 3338 3339 fhp = &nfh.fh_generic; 3340 nfsm_srvmtofh(fhp); 3341 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 3342 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 3343 if (error) { 3344 nfsm_reply(NFSX_UNSIGNED); 3345 nfsm_srvpostop_attr(getret, &at); 3346 return (0); 3347 } 3348 3349 /* XXX Try to make a guess on the max file size. */ 3350 sb = malloc(sizeof(*sb), M_TEMP, M_WAITOK); 3351 VFS_STATVFS(vp->v_mount, sb, (struct lwp *)0); 3352 maxfsize = (u_quad_t)0x80000000 * sb->f_frsize - 1; 3353 free(sb, M_TEMP); 3354 3355 getret = VOP_GETATTR(vp, &at, cred, lwp); 3356 vput(vp); 3357 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3FSINFO); 3358 nfsm_srvpostop_attr(getret, &at); 3359 nfsm_build(sip, struct nfsv3_fsinfo *, NFSX_V3FSINFO); 3360 3361 /* 3362 * XXX 3363 * There should be file system VFS OP(s) to get this information. 3364 * For now, assume ufs. 3365 */ 3366 if (slp->ns_so->so_type == SOCK_DGRAM) 3367 maxdata = NFS_MAXDGRAMDATA; 3368 else 3369 maxdata = NFS_MAXDATA; 3370 sip->fs_rtmax = txdr_unsigned(maxdata); 3371 sip->fs_rtpref = txdr_unsigned(maxdata); 3372 sip->fs_rtmult = txdr_unsigned(NFS_FABLKSIZE); 3373 sip->fs_wtmax = txdr_unsigned(maxdata); 3374 sip->fs_wtpref = txdr_unsigned(maxdata); 3375 sip->fs_wtmult = txdr_unsigned(NFS_FABLKSIZE); 3376 sip->fs_dtpref = txdr_unsigned(maxdata); 3377 txdr_hyper(maxfsize, &sip->fs_maxfilesize); 3378 sip->fs_timedelta.nfsv3_sec = 0; 3379 sip->fs_timedelta.nfsv3_nsec = txdr_unsigned(1); 3380 sip->fs_properties = txdr_unsigned(NFSV3FSINFO_LINK | 3381 NFSV3FSINFO_SYMLINK | NFSV3FSINFO_HOMOGENEOUS | 3382 NFSV3FSINFO_CANSETTIME); 3383 nfsm_srvdone; 3384 } 3385 3386 /* 3387 * nfs pathconf service 3388 */ 3389 int 3390 nfsrv_pathconf(nfsd, slp, lwp, mrq) 3391 struct nfsrv_descript *nfsd; 3392 struct nfssvc_sock *slp; 3393 struct lwp *lwp; 3394 struct mbuf **mrq; 3395 { 3396 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3397 struct mbuf *nam = nfsd->nd_nam; 3398 caddr_t dpos = nfsd->nd_dpos; 3399 kauth_cred_t cred = nfsd->nd_cr; 3400 u_int32_t *tl; 3401 struct nfsv3_pathconf *pc; 3402 int32_t t1; 3403 caddr_t bpos; 3404 int error = 0, rdonly, cache = 0, getret = 1; 3405 register_t linkmax, namemax, chownres, notrunc; 3406 char *cp2; 3407 struct mbuf *mb, *mreq; 3408 struct vnode *vp; 3409 struct vattr at; 3410 nfsfh_t nfh; 3411 fhandle_t *fhp; 3412 u_quad_t frev; 3413 3414 fhp = &nfh.fh_generic; 3415 nfsm_srvmtofh(fhp); 3416 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 3417 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 3418 if (error) { 3419 nfsm_reply(NFSX_UNSIGNED); 3420 nfsm_srvpostop_attr(getret, &at); 3421 return (0); 3422 } 3423 error = VOP_PATHCONF(vp, _PC_LINK_MAX, &linkmax); 3424 if (!error) 3425 error = VOP_PATHCONF(vp, _PC_NAME_MAX, &namemax); 3426 if (!error) 3427 error = VOP_PATHCONF(vp, _PC_CHOWN_RESTRICTED, &chownres); 3428 if (!error) 3429 error = VOP_PATHCONF(vp, _PC_NO_TRUNC, ¬runc); 3430 getret = VOP_GETATTR(vp, &at, cred, lwp); 3431 vput(vp); 3432 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3PATHCONF); 3433 nfsm_srvpostop_attr(getret, &at); 3434 if (error) 3435 return (0); 3436 nfsm_build(pc, struct nfsv3_pathconf *, NFSX_V3PATHCONF); 3437 3438 pc->pc_linkmax = txdr_unsigned(linkmax); 3439 pc->pc_namemax = txdr_unsigned(namemax); 3440 pc->pc_notrunc = txdr_unsigned(notrunc); 3441 pc->pc_chownrestricted = txdr_unsigned(chownres); 3442 3443 /* 3444 * These should probably be supported by VOP_PATHCONF(), but 3445 * until msdosfs is exportable (why would you want to?), the 3446 * Unix defaults should be ok. 3447 */ 3448 pc->pc_caseinsensitive = nfs_false; 3449 pc->pc_casepreserving = nfs_true; 3450 nfsm_srvdone; 3451 } 3452 3453 /* 3454 * Null operation, used by clients to ping server 3455 */ 3456 /* ARGSUSED */ 3457 int 3458 nfsrv_null(nfsd, slp, lwp, mrq) 3459 struct nfsrv_descript *nfsd; 3460 struct nfssvc_sock *slp; 3461 struct lwp *lwp; 3462 struct mbuf **mrq; 3463 { 3464 struct mbuf *mrep = nfsd->nd_mrep; 3465 caddr_t bpos; 3466 int error = NFSERR_RETVOID, cache = 0; 3467 struct mbuf *mb, *mreq; 3468 u_quad_t frev; 3469 3470 nfsm_reply(0); 3471 return (0); 3472 } 3473 3474 /* 3475 * No operation, used for obsolete procedures 3476 */ 3477 /* ARGSUSED */ 3478 int 3479 nfsrv_noop(nfsd, slp, lwp, mrq) 3480 struct nfsrv_descript *nfsd; 3481 struct nfssvc_sock *slp; 3482 struct lwp *lwp; 3483 struct mbuf **mrq; 3484 { 3485 struct mbuf *mrep = nfsd->nd_mrep; 3486 caddr_t bpos; 3487 int error, cache = 0; 3488 struct mbuf *mb, *mreq; 3489 u_quad_t frev; 3490 3491 if (nfsd->nd_repstat) 3492 error = nfsd->nd_repstat; 3493 else 3494 error = EPROCUNAVAIL; 3495 nfsm_reply(0); 3496 return (0); 3497 } 3498 3499 /* 3500 * Perform access checking for vnodes obtained from file handles that would 3501 * refer to files already opened by a Unix client. You cannot just use 3502 * vn_writechk() and VOP_ACCESS() for two reasons. 3503 * 1 - You must check for exported rdonly as well as MNT_RDONLY for the write case 3504 * 2 - The owner is to be given access irrespective of mode bits for some 3505 * operations, so that processes that chmod after opening a file don't 3506 * break. I don't like this because it opens a security hole, but since 3507 * the nfs server opens a security hole the size of a barn door anyhow, 3508 * what the heck. 3509 * 3510 * The exception to rule 2 is EPERM. If a file is IMMUTABLE, VOP_ACCESS() 3511 * will return EPERM instead of EACCESS. EPERM is always an error. 3512 */ 3513 int 3514 nfsrv_access(vp, flags, cred, rdonly, lwp, override) 3515 struct vnode *vp; 3516 int flags; 3517 kauth_cred_t cred; 3518 int rdonly; 3519 struct lwp *lwp; 3520 int override; 3521 { 3522 struct vattr vattr; 3523 int error; 3524 if (flags & VWRITE) { 3525 /* Just vn_writechk() changed to check rdonly */ 3526 /* 3527 * Disallow write attempts on read-only file systems; 3528 * unless the file is a socket or a block or character 3529 * device resident on the file system. 3530 */ 3531 if (rdonly || (vp->v_mount->mnt_flag & MNT_RDONLY)) { 3532 switch (vp->v_type) { 3533 case VREG: 3534 case VDIR: 3535 case VLNK: 3536 return (EROFS); 3537 default: 3538 break; 3539 } 3540 } 3541 3542 /* 3543 * If the vnode is in use as a process's text, 3544 * we can't allow writing. 3545 */ 3546 if (vp->v_flag & VTEXT) 3547 return (ETXTBSY); 3548 } 3549 error = VOP_GETATTR(vp, &vattr, cred, lwp); 3550 if (error) 3551 return (error); 3552 error = VOP_ACCESS(vp, flags, cred, lwp); 3553 /* 3554 * Allow certain operations for the owner (reads and writes 3555 * on files that are already open). 3556 */ 3557 if (override && error == EACCES && kauth_cred_geteuid(cred) == vattr.va_uid) 3558 error = 0; 3559 return error; 3560 } 3561
Indexes created Mon Sep 22 05:09:51 GMT 2025