nfs_serv.c revision 1.117
1 /* $NetBSD: nfs_serv.c,v 1.117 2006/09/02 12:40:36 yamt 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 1.117 2006/09/02 12:40:36 yamt 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/hash.h> 74 #include <sys/kauth.h> 75 76 #include <uvm/uvm.h> 77 78 #include <nfs/nfsproto.h> 79 #include <nfs/rpcv2.h> 80 #include <nfs/nfs.h> 81 #include <nfs/xdr_subs.h> 82 #include <nfs/nfsm_subs.h> 83 #include <nfs/nqnfs.h> 84 #include <nfs/nfs_var.h> 85 86 /* Global vars */ 87 extern u_int32_t nfs_xdrneg1; 88 extern u_int32_t nfs_false, nfs_true; 89 extern enum vtype nv3tov_type[8]; 90 extern struct nfsstats nfsstats; 91 extern const nfstype nfsv2_type[9]; 92 extern const nfstype nfsv3_type[9]; 93 int nfsrvw_procrastinate = NFS_GATHERDELAY * 1000; 94 int nfsd_use_loan = 1; /* use page-loan for READ OP */ 95 96 /* 97 * nfs v3 access service 98 */ 99 int 100 nfsrv3_access(nfsd, slp, lwp, mrq) 101 struct nfsrv_descript *nfsd; 102 struct nfssvc_sock *slp; 103 struct lwp *lwp; 104 struct mbuf **mrq; 105 { 106 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 107 struct mbuf *nam = nfsd->nd_nam; 108 caddr_t dpos = nfsd->nd_dpos; 109 kauth_cred_t cred = nfsd->nd_cr; 110 struct vnode *vp; 111 nfsrvfh_t nsfh; 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 nfsm_srvmtofh(&nsfh); 123 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 124 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, &rdonly, 125 (nfsd->nd_flag & ND_KERBAUTH), FALSE); 126 if (error) { 127 nfsm_reply(NFSX_UNSIGNED); 128 nfsm_srvpostop_attr(1, (struct vattr *)0); 129 return (0); 130 } 131 inmode = fxdr_unsigned(u_int32_t, *tl); 132 outmode = 0; 133 if ((inmode & NFSV3ACCESS_READ) && 134 nfsrv_access(vp, VREAD, cred, rdonly, lwp, 0) == 0) 135 outmode |= NFSV3ACCESS_READ; 136 if (vp->v_type != VDIR) { 137 testmode = inmode & (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND); 138 if (testmode && 139 nfsrv_access(vp, VWRITE, cred, rdonly, lwp, 0) == 0) 140 outmode |= testmode; 141 if ((inmode & NFSV3ACCESS_EXECUTE) && 142 nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 0) == 0) 143 outmode |= NFSV3ACCESS_EXECUTE; 144 } else { 145 testmode = inmode & (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | 146 NFSV3ACCESS_DELETE); 147 if (testmode && 148 nfsrv_access(vp, VWRITE, cred, rdonly, lwp, 0) == 0) 149 outmode |= testmode; 150 if ((inmode & NFSV3ACCESS_LOOKUP) && 151 nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 0) == 0) 152 outmode |= NFSV3ACCESS_LOOKUP; 153 } 154 getret = VOP_GETATTR(vp, &va, cred, lwp); 155 vput(vp); 156 nfsm_reply(NFSX_POSTOPATTR(1) + NFSX_UNSIGNED); 157 nfsm_srvpostop_attr(getret, &va); 158 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 159 *tl = txdr_unsigned(outmode); 160 nfsm_srvdone; 161 } 162 163 /* 164 * nfs getattr service 165 */ 166 int 167 nfsrv_getattr(nfsd, slp, lwp, mrq) 168 struct nfsrv_descript *nfsd; 169 struct nfssvc_sock *slp; 170 struct lwp *lwp; 171 struct mbuf **mrq; 172 { 173 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 174 struct mbuf *nam = nfsd->nd_nam; 175 caddr_t dpos = nfsd->nd_dpos; 176 kauth_cred_t cred = nfsd->nd_cr; 177 struct nfs_fattr *fp; 178 struct vattr va; 179 struct vnode *vp; 180 nfsrvfh_t nsfh; 181 u_int32_t *tl; 182 int32_t t1; 183 caddr_t bpos; 184 int error = 0, rdonly, cache = 0; 185 char *cp2; 186 struct mbuf *mb, *mreq; 187 u_quad_t frev; 188 189 nfsm_srvmtofh(&nsfh); 190 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, &rdonly, 191 (nfsd->nd_flag & ND_KERBAUTH), FALSE); 192 if (error) { 193 nfsm_reply(0); 194 return (0); 195 } 196 nqsrv_getl(vp, ND_READ); 197 error = VOP_GETATTR(vp, &va, cred, lwp); 198 vput(vp); 199 nfsm_reply(NFSX_FATTR(nfsd->nd_flag & ND_NFSV3)); 200 if (error) 201 return (0); 202 nfsm_build(fp, struct nfs_fattr *, NFSX_FATTR(nfsd->nd_flag & ND_NFSV3)); 203 nfsm_srvfillattr(&va, fp); 204 nfsm_srvdone; 205 } 206 207 /* 208 * nfs setattr service 209 */ 210 int 211 nfsrv_setattr(nfsd, slp, lwp, mrq) 212 struct nfsrv_descript *nfsd; 213 struct nfssvc_sock *slp; 214 struct lwp *lwp; 215 struct mbuf **mrq; 216 { 217 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 218 struct mbuf *nam = nfsd->nd_nam; 219 caddr_t dpos = nfsd->nd_dpos; 220 kauth_cred_t cred = nfsd->nd_cr; 221 struct vattr va, preat; 222 struct nfsv2_sattr *sp; 223 struct nfs_fattr *fp; 224 struct vnode *vp; 225 nfsrvfh_t nsfh; 226 u_int32_t *tl; 227 int32_t t1; 228 caddr_t bpos; 229 int error = 0, rdonly, cache = 0, preat_ret = 1, postat_ret = 1; 230 int v3 = (nfsd->nd_flag & ND_NFSV3), gcheck = 0; 231 char *cp2; 232 struct mbuf *mb, *mreq; 233 u_quad_t frev; 234 struct timespec guard; 235 struct mount *mp = NULL; 236 237 memset(&guard, 0, sizeof guard); /* XXX gcc */ 238 239 nfsm_srvmtofh(&nsfh); 240 if ((mp = vfs_getvfs(&NFSRVFH_FHANDLE(&nsfh)->fh_fsid)) == NULL) 241 return (ESTALE); 242 vn_start_write(NULL, &mp, V_WAIT); 243 VATTR_NULL(&va); 244 if (v3) { 245 nfsm_srvsattr(&va); 246 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 247 gcheck = fxdr_unsigned(int, *tl); 248 if (gcheck) { 249 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 250 fxdr_nfsv3time(tl, &guard); 251 } 252 } else { 253 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 254 /* 255 * Nah nah nah nah na nah 256 * There is a bug in the Sun client that puts 0xffff in the mode 257 * field of sattr when it should put in 0xffffffff. The u_short 258 * doesn't sign extend. 259 * --> check the low order 2 bytes for 0xffff 260 */ 261 if ((fxdr_unsigned(int, sp->sa_mode) & 0xffff) != 0xffff) 262 va.va_mode = nfstov_mode(sp->sa_mode); 263 if (sp->sa_uid != nfs_xdrneg1) 264 va.va_uid = fxdr_unsigned(uid_t, sp->sa_uid); 265 if (sp->sa_gid != nfs_xdrneg1) 266 va.va_gid = fxdr_unsigned(gid_t, sp->sa_gid); 267 if (sp->sa_size != nfs_xdrneg1) 268 va.va_size = fxdr_unsigned(u_quad_t, sp->sa_size); 269 if (sp->sa_atime.nfsv2_sec != nfs_xdrneg1) { 270 #ifdef notyet 271 fxdr_nfsv2time(&sp->sa_atime, &va.va_atime); 272 #else 273 va.va_atime.tv_sec = 274 fxdr_unsigned(u_int32_t,sp->sa_atime.nfsv2_sec); 275 va.va_atime.tv_nsec = 0; 276 #endif 277 } 278 if (sp->sa_mtime.nfsv2_sec != nfs_xdrneg1) 279 fxdr_nfsv2time(&sp->sa_mtime, &va.va_mtime); 280 281 } 282 283 /* 284 * Now that we have all the fields, lets do it. 285 */ 286 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, &rdonly, 287 (nfsd->nd_flag & ND_KERBAUTH), FALSE); 288 if (error) { 289 nfsm_reply(2 * NFSX_UNSIGNED); 290 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 291 vn_finished_write(mp, 0); 292 return (0); 293 } 294 nqsrv_getl(vp, ND_WRITE); 295 if (v3) { 296 error = preat_ret = VOP_GETATTR(vp, &preat, cred, lwp); 297 if (!error && gcheck && 298 (preat.va_ctime.tv_sec != guard.tv_sec || 299 preat.va_ctime.tv_nsec != guard.tv_nsec)) 300 error = NFSERR_NOT_SYNC; 301 if (error) { 302 vput(vp); 303 nfsm_reply(NFSX_WCCDATA(v3)); 304 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 305 vn_finished_write(mp, 0); 306 return (0); 307 } 308 } 309 310 /* 311 * If the size is being changed write acces is required, otherwise 312 * just check for a read only file system. 313 */ 314 if (va.va_size == ((u_quad_t)((quad_t) -1))) { 315 if (rdonly || (vp->v_mount->mnt_flag & MNT_RDONLY)) { 316 error = EROFS; 317 goto out; 318 } 319 } else { 320 if (vp->v_type == VDIR) { 321 error = EISDIR; 322 goto out; 323 } else if ((error = nfsrv_access(vp, VWRITE, cred, rdonly, 324 lwp, 0)) != 0) 325 goto out; 326 } 327 error = VOP_SETATTR(vp, &va, cred, lwp); 328 postat_ret = VOP_GETATTR(vp, &va, cred, lwp); 329 if (!error) 330 error = postat_ret; 331 out: 332 vput(vp); 333 vn_finished_write(mp, 0); 334 nfsm_reply(NFSX_WCCORFATTR(v3)); 335 if (v3) { 336 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 337 return (0); 338 } else { 339 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 340 nfsm_srvfillattr(&va, fp); 341 } 342 nfsm_srvdone; 343 } 344 345 /* 346 * nfs lookup rpc 347 */ 348 int 349 nfsrv_lookup(nfsd, slp, lwp, mrq) 350 struct nfsrv_descript *nfsd; 351 struct nfssvc_sock *slp; 352 struct lwp *lwp; 353 struct mbuf **mrq; 354 { 355 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 356 struct mbuf *nam = nfsd->nd_nam; 357 caddr_t dpos = nfsd->nd_dpos; 358 kauth_cred_t cred = nfsd->nd_cr; 359 struct nfs_fattr *fp; 360 struct nameidata nd, ind, *ndp = &nd; 361 struct vnode *vp, *dirp; 362 nfsrvfh_t nsfh; 363 caddr_t cp; 364 u_int32_t *tl; 365 int32_t t1; 366 caddr_t bpos; 367 int error = 0, cache = 0, dirattr_ret = 1; 368 uint32_t len; 369 int v3 = (nfsd->nd_flag & ND_NFSV3), pubflag; 370 char *cp2; 371 struct mbuf *mb, *mreq; 372 struct vattr va, dirattr; 373 u_quad_t frev; 374 375 nfsm_srvmtofh(&nsfh); 376 nfsm_srvnamesiz(len); 377 378 pubflag = nfs_ispublicfh(&nsfh); 379 380 nd.ni_cnd.cn_cred = cred; 381 nd.ni_cnd.cn_nameiop = LOOKUP; 382 nd.ni_cnd.cn_flags = LOCKLEAF | SAVESTART; 383 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 384 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), pubflag); 385 386 if (!error && pubflag) { 387 if (nd.ni_vp->v_type == VDIR && nfs_pub.np_index != NULL) { 388 /* 389 * Setup call to lookup() to see if we can find 390 * the index file. Arguably, this doesn't belong 391 * in a kernel.. Ugh. 392 */ 393 ind = nd; 394 VOP_UNLOCK(nd.ni_vp, 0); 395 ind.ni_pathlen = strlen(nfs_pub.np_index); 396 ind.ni_cnd.cn_nameptr = ind.ni_cnd.cn_pnbuf = 397 nfs_pub.np_index; 398 ind.ni_startdir = nd.ni_vp; 399 VREF(ind.ni_startdir); 400 error = lookup(&ind); 401 if (!error) { 402 /* 403 * Found an index file. Get rid of 404 * the old references. 405 */ 406 if (dirp) 407 vrele(dirp); 408 dirp = nd.ni_vp; 409 vrele(nd.ni_startdir); 410 ndp = &ind; 411 } else 412 error = 0; 413 } 414 /* 415 * If the public filehandle was used, check that this lookup 416 * didn't result in a filehandle outside the publicly exported 417 * filesystem. 418 */ 419 420 if (!error && ndp->ni_vp->v_mount != nfs_pub.np_mount) { 421 vput(nd.ni_vp); 422 error = EPERM; 423 } 424 } 425 426 if (dirp) { 427 if (v3) 428 dirattr_ret = VOP_GETATTR(dirp, &dirattr, cred, lwp); 429 vrele(dirp); 430 } 431 432 if (error) { 433 nfsm_reply(NFSX_POSTOPATTR(v3)); 434 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 435 return (0); 436 } 437 438 nqsrv_getl(ndp->ni_startdir, ND_READ); 439 vrele(ndp->ni_startdir); 440 PNBUF_PUT(nd.ni_cnd.cn_pnbuf); 441 vp = ndp->ni_vp; 442 error = nfsrv_composefh(vp, &nsfh, v3); 443 if (!error) 444 error = VOP_GETATTR(vp, &va, cred, lwp); 445 vput(vp); 446 nfsm_reply(NFSX_SRVFH(&nsfh, v3) + NFSX_POSTOPORFATTR(v3) + 447 NFSX_POSTOPATTR(v3)); 448 if (error) { 449 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 450 return (0); 451 } 452 nfsm_srvfhtom(&nsfh, v3); 453 if (v3) { 454 nfsm_srvpostop_attr(0, &va); 455 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 456 } else { 457 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 458 nfsm_srvfillattr(&va, fp); 459 } 460 nfsm_srvdone; 461 } 462 463 /* 464 * nfs readlink service 465 */ 466 int 467 nfsrv_readlink(nfsd, slp, lwp, mrq) 468 struct nfsrv_descript *nfsd; 469 struct nfssvc_sock *slp; 470 struct lwp *lwp; 471 struct mbuf **mrq; 472 { 473 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 474 struct mbuf *nam = nfsd->nd_nam; 475 caddr_t dpos = nfsd->nd_dpos; 476 kauth_cred_t cred = nfsd->nd_cr; 477 struct iovec iv[(NFS_MAXPATHLEN+MLEN-1)/MLEN]; 478 struct iovec *ivp = iv; 479 struct mbuf *mp; 480 u_int32_t *tl; 481 int32_t t1; 482 caddr_t bpos; 483 int error = 0, rdonly, cache = 0, i, padlen, getret; 484 uint32_t len; 485 int v3 = (nfsd->nd_flag & ND_NFSV3); 486 char *cp2; 487 struct mbuf *mb, *mp2 = NULL, *mp3 = NULL, *mreq; 488 struct vnode *vp; 489 struct vattr attr; 490 nfsrvfh_t nsfh; 491 struct uio io, *uiop = &io; 492 u_quad_t frev; 493 494 nfsm_srvmtofh(&nsfh); 495 len = 0; 496 i = 0; 497 while (len < NFS_MAXPATHLEN) { 498 mp = m_get(M_WAIT, MT_DATA); 499 MCLAIM(mp, &nfs_mowner); 500 m_clget(mp, M_WAIT); 501 mp->m_len = NFSMSIZ(mp); 502 if (len == 0) 503 mp3 = mp2 = mp; 504 else { 505 mp2->m_next = mp; 506 mp2 = mp; 507 } 508 if ((len+mp->m_len) > NFS_MAXPATHLEN) { 509 mp->m_len = NFS_MAXPATHLEN-len; 510 len = NFS_MAXPATHLEN; 511 } else 512 len += mp->m_len; 513 ivp->iov_base = mtod(mp, caddr_t); 514 ivp->iov_len = mp->m_len; 515 i++; 516 ivp++; 517 } 518 uiop->uio_iov = iv; 519 uiop->uio_iovcnt = i; 520 uiop->uio_offset = 0; 521 uiop->uio_resid = len; 522 uiop->uio_rw = UIO_READ; 523 UIO_SETUP_SYSSPACE(uiop); 524 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 525 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 526 if (error) { 527 m_freem(mp3); 528 nfsm_reply(2 * NFSX_UNSIGNED); 529 nfsm_srvpostop_attr(1, (struct vattr *)0); 530 return (0); 531 } 532 if (vp->v_type != VLNK) { 533 if (v3) 534 error = EINVAL; 535 else 536 error = ENXIO; 537 goto out; 538 } 539 nqsrv_getl(vp, ND_READ); 540 error = VOP_READLINK(vp, uiop, cred); 541 out: 542 getret = VOP_GETATTR(vp, &attr, cred, lwp); 543 vput(vp); 544 if (error) 545 m_freem(mp3); 546 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_UNSIGNED); 547 if (v3) { 548 nfsm_srvpostop_attr(getret, &attr); 549 if (error) 550 return (0); 551 } 552 len -= uiop->uio_resid; 553 padlen = nfsm_padlen(len); 554 if (uiop->uio_resid || padlen) 555 nfs_zeropad(mp3, uiop->uio_resid, padlen); 556 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 557 *tl = txdr_unsigned(len); 558 mb->m_next = mp3; 559 nfsm_srvdone; 560 } 561 562 /* 563 * nfs read service 564 */ 565 int 566 nfsrv_read(nfsd, slp, lwp, mrq) 567 struct nfsrv_descript *nfsd; 568 struct nfssvc_sock *slp; 569 struct lwp *lwp; 570 struct mbuf **mrq; 571 { 572 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 573 struct mbuf *nam = nfsd->nd_nam; 574 caddr_t dpos = nfsd->nd_dpos; 575 kauth_cred_t cred = nfsd->nd_cr; 576 struct mbuf *m; 577 struct nfs_fattr *fp; 578 u_int32_t *tl; 579 int32_t t1; 580 int i; 581 caddr_t bpos; 582 int error = 0, rdonly, cache = 0, getret; 583 int v3 = (nfsd->nd_flag & ND_NFSV3); 584 uint32_t reqlen, len, cnt, left; 585 int padlen; 586 char *cp2; 587 struct mbuf *mb, *mreq; 588 struct vnode *vp; 589 nfsrvfh_t nsfh; 590 struct uio io, *uiop = &io; 591 struct vattr va; 592 off_t off; 593 u_quad_t frev; 594 595 nfsm_srvmtofh(&nsfh); 596 if (v3) { 597 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 598 off = fxdr_hyper(tl); 599 } else { 600 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 601 off = (off_t)fxdr_unsigned(u_int32_t, *tl); 602 } 603 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 604 reqlen = fxdr_unsigned(uint32_t, *tl); 605 reqlen = MIN(reqlen, NFS_SRVMAXDATA(nfsd)); 606 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 607 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 608 if (error) { 609 nfsm_reply(2 * NFSX_UNSIGNED); 610 nfsm_srvpostop_attr(1, (struct vattr *)0); 611 return (0); 612 } 613 if (vp->v_type != VREG) { 614 if (v3) 615 error = EINVAL; 616 else 617 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 618 } 619 if (!error) { 620 nqsrv_getl(vp, ND_READ); 621 if ((error = nfsrv_access(vp, VREAD, cred, rdonly, lwp, 1)) != 0) 622 error = nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 1); 623 } 624 getret = VOP_GETATTR(vp, &va, cred, lwp); 625 if (!error) 626 error = getret; 627 if (error) { 628 vput(vp); 629 nfsm_reply(NFSX_POSTOPATTR(v3)); 630 nfsm_srvpostop_attr(getret, &va); 631 return (0); 632 } 633 if (off >= va.va_size) 634 cnt = 0; 635 else if ((off + reqlen) > va.va_size) 636 cnt = va.va_size - off; 637 else 638 cnt = reqlen; 639 nfsm_reply(NFSX_POSTOPORFATTR(v3) + 3 * NFSX_UNSIGNED+nfsm_rndup(cnt)); 640 if (v3) { 641 nfsm_build(tl, u_int32_t *, NFSX_V3FATTR + 4 * NFSX_UNSIGNED); 642 *tl++ = nfs_true; 643 fp = (struct nfs_fattr *)tl; 644 tl += (NFSX_V3FATTR / sizeof (u_int32_t)); 645 } else { 646 nfsm_build(tl, u_int32_t *, NFSX_V2FATTR + NFSX_UNSIGNED); 647 fp = (struct nfs_fattr *)tl; 648 tl += (NFSX_V2FATTR / sizeof (u_int32_t)); 649 } 650 len = left = cnt; 651 if (cnt > 0) { 652 if (nfsd_use_loan) { 653 struct vm_page **pgpp; 654 voff_t pgoff = trunc_page(off); 655 int npages; 656 vaddr_t lva; 657 658 npages = (round_page(off + cnt) - pgoff) >> PAGE_SHIFT; 659 KASSERT(npages <= M_EXT_MAXPAGES); /* XXX */ 660 661 /* allocate kva for mbuf data */ 662 lva = sokvaalloc(npages << PAGE_SHIFT, slp->ns_so); 663 if (lva == 0) { 664 /* fall back to VOP_READ */ 665 goto loan_fail; 666 } 667 668 /* allocate mbuf */ 669 m = m_get(M_WAIT, MT_DATA); 670 MCLAIM(m, &nfs_mowner); 671 pgpp = m->m_ext.ext_pgs; 672 673 /* loan pages */ 674 error = uvm_loanuobjpages(&vp->v_uobj, pgoff, npages, 675 pgpp); 676 if (error) { 677 sokvafree(lva, npages << PAGE_SHIFT); 678 m_free(m); 679 if (error == EBUSY) 680 goto loan_fail; 681 goto read_error; 682 } 683 684 /* associate kva to mbuf */ 685 MEXTADD(m, (void *)(lva + ((vaddr_t)off & PAGE_MASK)), 686 cnt, M_MBUF, soloanfree, slp->ns_so); 687 m->m_flags |= M_EXT_PAGES | M_EXT_ROMAP; 688 m->m_len = cnt; 689 690 /* map pages */ 691 for (i = 0; i < npages; i++) { 692 pmap_kenter_pa(lva, VM_PAGE_TO_PHYS(pgpp[i]), 693 VM_PROT_READ); 694 lva += PAGE_SIZE; 695 } 696 697 pmap_update(pmap_kernel()); 698 699 mb->m_next = m; 700 mb = m; 701 error = 0; 702 uiop->uio_resid = 0; 703 } else { 704 struct iovec *iv; 705 struct iovec *iv2; 706 struct mbuf *m2; 707 int siz; 708 loan_fail: 709 /* 710 * Generate the mbuf list with the uio_iov ref. to it. 711 */ 712 i = 0; 713 m = m2 = mb; 714 while (left > 0) { 715 siz = min(M_TRAILINGSPACE(m), left); 716 if (siz > 0) { 717 left -= siz; 718 i++; 719 } 720 if (left > 0) { 721 m = m_get(M_WAIT, MT_DATA); 722 MCLAIM(m, &nfs_mowner); 723 m_clget(m, M_WAIT); 724 m->m_len = 0; 725 m2->m_next = m; 726 m2 = m; 727 } 728 } 729 iv = malloc(i * sizeof(struct iovec), M_TEMP, M_WAITOK); 730 uiop->uio_iov = iv2 = iv; 731 m = mb; 732 left = cnt; 733 i = 0; 734 while (left > 0) { 735 if (m == NULL) 736 panic("nfsrv_read iov"); 737 siz = min(M_TRAILINGSPACE(m), left); 738 if (siz > 0) { 739 iv->iov_base = mtod(m, caddr_t) + 740 m->m_len; 741 iv->iov_len = siz; 742 m->m_len += siz; 743 left -= siz; 744 iv++; 745 i++; 746 } 747 m = m->m_next; 748 } 749 uiop->uio_iovcnt = i; 750 uiop->uio_offset = off; 751 uiop->uio_resid = cnt; 752 uiop->uio_rw = UIO_READ; 753 UIO_SETUP_SYSSPACE(uiop); 754 error = VOP_READ(vp, uiop, IO_NODELOCKED, cred); 755 free((caddr_t)iv2, M_TEMP); 756 } 757 read_error: 758 if (error || (getret = VOP_GETATTR(vp, &va, cred, lwp)) != 0){ 759 if (!error) 760 error = getret; 761 m_freem(mreq); 762 vput(vp); 763 nfsm_reply(NFSX_POSTOPATTR(v3)); 764 nfsm_srvpostop_attr(getret, &va); 765 return (0); 766 } 767 } else { 768 uiop->uio_resid = 0; 769 } 770 vput(vp); 771 nfsm_srvfillattr(&va, fp); 772 len -= uiop->uio_resid; 773 padlen = nfsm_padlen(len); 774 if (uiop->uio_resid || padlen) 775 nfs_zeropad(mb, uiop->uio_resid, padlen); 776 if (v3) { 777 /* count */ 778 *tl++ = txdr_unsigned(len); 779 /* eof */ 780 if (off + len >= va.va_size) 781 *tl++ = nfs_true; 782 else 783 *tl++ = nfs_false; 784 } 785 *tl = txdr_unsigned(len); 786 nfsm_srvdone; 787 } 788 789 /* 790 * nfs write service 791 */ 792 int 793 nfsrv_write(nfsd, slp, lwp, mrq) 794 struct nfsrv_descript *nfsd; 795 struct nfssvc_sock *slp; 796 struct lwp *lwp; 797 struct mbuf **mrq; 798 { 799 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 800 struct mbuf *nam = nfsd->nd_nam; 801 caddr_t dpos = nfsd->nd_dpos; 802 kauth_cred_t cred = nfsd->nd_cr; 803 struct iovec *ivp; 804 int i, cnt; 805 struct mbuf *mp; 806 struct nfs_fattr *fp; 807 struct iovec *iv; 808 struct vattr va, forat; 809 u_int32_t *tl; 810 int32_t t1; 811 caddr_t bpos; 812 int error = 0, rdonly, cache = 0, len, forat_ret = 1; 813 int ioflags, aftat_ret = 1, retlen, zeroing, adjust; 814 int stable = NFSV3WRITE_FILESYNC; 815 int v3 = (nfsd->nd_flag & ND_NFSV3); 816 char *cp2; 817 struct mbuf *mb, *mreq; 818 struct vnode *vp; 819 nfsrvfh_t nsfh; 820 struct uio io, *uiop = &io; 821 off_t off; 822 u_quad_t frev; 823 struct mount *mntp = NULL; 824 825 if (mrep == NULL) { 826 *mrq = NULL; 827 return (0); 828 } 829 nfsm_srvmtofh(&nsfh); 830 if ((mntp = vfs_getvfs(&NFSRVFH_FHANDLE(&nsfh)->fh_fsid)) == NULL) 831 return (ESTALE); 832 vn_start_write(NULL, &mntp, V_WAIT); 833 if (v3) { 834 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 835 off = fxdr_hyper(tl); 836 tl += 3; 837 stable = fxdr_unsigned(int, *tl++); 838 } else { 839 nfsm_dissect(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 840 off = (off_t)fxdr_unsigned(u_int32_t, *++tl); 841 tl += 2; 842 } 843 retlen = len = fxdr_unsigned(int32_t, *tl); 844 cnt = i = 0; 845 846 /* 847 * For NFS Version 2, it is not obvious what a write of zero length 848 * should do, but I might as well be consistent with Version 3, 849 * which is to return ok so long as there are no permission problems. 850 */ 851 if (len > 0) { 852 zeroing = 1; 853 mp = mrep; 854 while (mp) { 855 if (mp == md) { 856 zeroing = 0; 857 adjust = dpos - mtod(mp, caddr_t); 858 mp->m_len -= adjust; 859 if (mp->m_len > 0 && adjust > 0) 860 NFSMADV(mp, adjust); 861 } 862 if (zeroing) 863 mp->m_len = 0; 864 else if (mp->m_len > 0) { 865 i += mp->m_len; 866 if (i > len) { 867 mp->m_len -= (i - len); 868 zeroing = 1; 869 } 870 if (mp->m_len > 0) 871 cnt++; 872 } 873 mp = mp->m_next; 874 } 875 } 876 if (len > NFS_MAXDATA || len < 0 || i < len) { 877 error = EIO; 878 nfsm_reply(2 * NFSX_UNSIGNED); 879 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 880 vn_finished_write(mntp, 0); 881 return (0); 882 } 883 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 884 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 885 if (error) { 886 nfsm_reply(2 * NFSX_UNSIGNED); 887 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 888 vn_finished_write(mntp, 0); 889 return (0); 890 } 891 if (v3) 892 forat_ret = VOP_GETATTR(vp, &forat, cred, lwp); 893 if (vp->v_type != VREG) { 894 if (v3) 895 error = EINVAL; 896 else 897 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 898 } 899 if (!error) { 900 nqsrv_getl(vp, ND_WRITE); 901 error = nfsrv_access(vp, VWRITE, cred, rdonly, lwp, 1); 902 } 903 if (error) { 904 vput(vp); 905 nfsm_reply(NFSX_WCCDATA(v3)); 906 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 907 vn_finished_write(mntp, 0); 908 return (0); 909 } 910 911 if (len > 0) { 912 ivp = malloc(cnt * sizeof (struct iovec), M_TEMP, M_WAITOK); 913 uiop->uio_iov = iv = ivp; 914 uiop->uio_iovcnt = cnt; 915 mp = mrep; 916 while (mp) { 917 if (mp->m_len > 0) { 918 ivp->iov_base = mtod(mp, caddr_t); 919 ivp->iov_len = mp->m_len; 920 ivp++; 921 } 922 mp = mp->m_next; 923 } 924 925 /* 926 * XXX 927 * The IO_METASYNC flag indicates that all metadata (and not 928 * just enough to ensure data integrity) must be written to 929 * stable storage synchronously. 930 * (IO_METASYNC is not yet implemented in 4.4BSD-Lite.) 931 */ 932 if (stable == NFSV3WRITE_UNSTABLE) 933 ioflags = IO_NODELOCKED; 934 else if (stable == NFSV3WRITE_DATASYNC) 935 ioflags = (IO_SYNC | IO_NODELOCKED); 936 else 937 ioflags = (IO_METASYNC | IO_SYNC | IO_NODELOCKED); 938 uiop->uio_resid = len; 939 uiop->uio_rw = UIO_WRITE; 940 uiop->uio_offset = off; 941 UIO_SETUP_SYSSPACE(uiop); 942 error = VOP_WRITE(vp, uiop, ioflags, cred); 943 nfsstats.srvvop_writes++; 944 free(iv, M_TEMP); 945 } 946 aftat_ret = VOP_GETATTR(vp, &va, cred, lwp); 947 vput(vp); 948 vn_finished_write(mntp, 0); 949 if (!error) 950 error = aftat_ret; 951 nfsm_reply(NFSX_PREOPATTR(v3) + NFSX_POSTOPORFATTR(v3) + 952 2 * NFSX_UNSIGNED + NFSX_WRITEVERF(v3)); 953 if (v3) { 954 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 955 if (error) 956 return (0); 957 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 958 *tl++ = txdr_unsigned(retlen); 959 if (stable == NFSV3WRITE_UNSTABLE) 960 *tl++ = txdr_unsigned(stable); 961 else 962 *tl++ = txdr_unsigned(NFSV3WRITE_FILESYNC); 963 /* 964 * Actually, there is no need to txdr these fields, 965 * but it may make the values more human readable, 966 * for debugging purposes. 967 */ 968 *tl++ = txdr_unsigned(boottime.tv_sec); 969 *tl = txdr_unsigned(boottime.tv_usec); 970 } else { 971 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 972 nfsm_srvfillattr(&va, fp); 973 } 974 nfsm_srvdone; 975 } 976 977 /* 978 * XXX elad: the original NFSW_SAMECRED() macro also made sure the 979 * two nd_flag fields of the descriptors contained 980 * ND_KERBAUTH. 981 */ 982 static int 983 nfsrv_samecred(kauth_cred_t cred1, kauth_cred_t cred2) 984 { 985 int i, do_ngroups; 986 987 if (kauth_cred_geteuid(cred1) != kauth_cred_geteuid(cred2)) 988 return (0); 989 if (kauth_cred_ngroups(cred1) != kauth_cred_ngroups(cred2)) 990 return (0); 991 do_ngroups = kauth_cred_ngroups(cred1); 992 for (i = 0; i < do_ngroups; i++) 993 if (kauth_cred_group(cred1, i) != 994 kauth_cred_group(cred2, i)) 995 return (0); 996 997 return (1); 998 } 999 1000 static struct nfsrvw_delayhash * 1001 nfsrv_nwdelayhash(struct nfssvc_sock *slp, const nfsrvfh_t *nsfh) 1002 { 1003 uint32_t hash; 1004 1005 hash = hash32_buf(NFSRVFH_DATA(nsfh), NFSRVFH_SIZE(nsfh), 1006 HASH32_BUF_INIT); 1007 return &slp->ns_wdelayhashtbl[hash % NFS_WDELAYHASHSIZ]; 1008 } 1009 1010 /* 1011 * NFS write service with write gathering support. Called when 1012 * nfsrvw_procrastinate > 0. 1013 * See: Chet Juszczak, "Improving the Write Performance of an NFS Server", 1014 * in Proc. of the Winter 1994 Usenix Conference, pg. 247-259, San Franscisco, 1015 * Jan. 1994. 1016 */ 1017 int 1018 nfsrv_writegather(ndp, slp, lwp, mrq) 1019 struct nfsrv_descript **ndp; 1020 struct nfssvc_sock *slp; 1021 struct lwp *lwp; 1022 struct mbuf **mrq; 1023 { 1024 struct timeval now; 1025 struct iovec *ivp; 1026 struct mbuf *mp; 1027 struct nfsrv_descript *wp, *nfsd, *owp, *swp; 1028 struct nfs_fattr *fp; 1029 int i = 0; 1030 struct iovec *iov; 1031 struct nfsrvw_delayhash *wpp; 1032 kauth_cred_t cred; 1033 struct vattr va, forat; 1034 u_int32_t *tl; 1035 int32_t t1; 1036 caddr_t bpos, dpos; 1037 int error = 0, rdonly, cache = 0, len = 0, forat_ret = 1; 1038 int ioflags, aftat_ret = 1, s, adjust, v3, zeroing; 1039 char *cp2; 1040 struct mbuf *mb, *mreq, *mrep, *md; 1041 struct vnode *vp; 1042 struct uio io, *uiop = &io; 1043 u_quad_t frev, cur_usec; 1044 struct mount *mntp = NULL; 1045 1046 *mrq = NULL; 1047 if (*ndp) { 1048 nfsd = *ndp; 1049 *ndp = NULL; 1050 mrep = nfsd->nd_mrep; 1051 md = nfsd->nd_md; 1052 dpos = nfsd->nd_dpos; 1053 cred = nfsd->nd_cr; 1054 v3 = (nfsd->nd_flag & ND_NFSV3); 1055 LIST_INIT(&nfsd->nd_coalesce); 1056 nfsd->nd_mreq = NULL; 1057 nfsd->nd_stable = NFSV3WRITE_FILESYNC; 1058 getmicrotime(&now); 1059 cur_usec = (u_quad_t)now.tv_sec * 1000000 + (u_quad_t)now.tv_usec; 1060 nfsd->nd_time = cur_usec + nfsrvw_procrastinate; 1061 1062 /* 1063 * Now, get the write header.. 1064 */ 1065 nfsm_srvmtofh(&nfsd->nd_fh); 1066 if (v3) { 1067 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 1068 nfsd->nd_off = fxdr_hyper(tl); 1069 tl += 3; 1070 nfsd->nd_stable = fxdr_unsigned(int, *tl++); 1071 } else { 1072 nfsm_dissect(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1073 nfsd->nd_off = (off_t)fxdr_unsigned(u_int32_t, *++tl); 1074 tl += 2; 1075 } 1076 len = fxdr_unsigned(int32_t, *tl); 1077 nfsd->nd_len = len; 1078 nfsd->nd_eoff = nfsd->nd_off + len; 1079 1080 /* 1081 * Trim the header out of the mbuf list and trim off any trailing 1082 * junk so that the mbuf list has only the write data. 1083 */ 1084 zeroing = 1; 1085 i = 0; 1086 mp = mrep; 1087 while (mp) { 1088 if (mp == md) { 1089 zeroing = 0; 1090 adjust = dpos - mtod(mp, caddr_t); 1091 mp->m_len -= adjust; 1092 if (mp->m_len > 0 && adjust > 0) 1093 NFSMADV(mp, adjust); 1094 } 1095 if (zeroing) 1096 mp->m_len = 0; 1097 else { 1098 i += mp->m_len; 1099 if (i > len) { 1100 mp->m_len -= (i - len); 1101 zeroing = 1; 1102 } 1103 } 1104 mp = mp->m_next; 1105 } 1106 if (len > NFS_MAXDATA || len < 0 || i < len) { 1107 nfsmout: 1108 m_freem(mrep); 1109 error = EIO; 1110 nfsm_writereply(2 * NFSX_UNSIGNED, v3); 1111 if (v3) 1112 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1113 nfsd->nd_mreq = mreq; 1114 nfsd->nd_mrep = NULL; 1115 nfsd->nd_time = 0; 1116 } 1117 1118 /* 1119 * Add this entry to the hash and time queues. 1120 */ 1121 s = splsoftclock(); 1122 owp = NULL; 1123 wp = LIST_FIRST(&slp->ns_tq); 1124 while (wp && wp->nd_time < nfsd->nd_time) { 1125 owp = wp; 1126 wp = LIST_NEXT(wp, nd_tq); 1127 } 1128 if (owp) { 1129 LIST_INSERT_AFTER(owp, nfsd, nd_tq); 1130 } else { 1131 LIST_INSERT_HEAD(&slp->ns_tq, nfsd, nd_tq); 1132 } 1133 if (nfsd->nd_mrep) { 1134 wpp = nfsrv_nwdelayhash(slp, &nfsd->nd_fh); 1135 owp = NULL; 1136 wp = LIST_FIRST(wpp); 1137 while (wp && nfsrv_comparefh(&nfsd->nd_fh, &wp->nd_fh)) { 1138 owp = wp; 1139 wp = LIST_NEXT(wp, nd_hash); 1140 } 1141 while (wp && wp->nd_off < nfsd->nd_off && 1142 !nfsrv_comparefh(&nfsd->nd_fh, &wp->nd_fh)) { 1143 owp = wp; 1144 wp = LIST_NEXT(wp, nd_hash); 1145 } 1146 if (owp) { 1147 LIST_INSERT_AFTER(owp, nfsd, nd_hash); 1148 1149 /* 1150 * Search the hash list for overlapping entries and 1151 * coalesce. 1152 */ 1153 for(; nfsd && NFSW_CONTIG(owp, nfsd); nfsd = wp) { 1154 wp = LIST_NEXT(nfsd, nd_hash); 1155 if (nfsrv_samecred(owp->nd_cr, nfsd->nd_cr)) 1156 nfsrvw_coalesce(owp, nfsd); 1157 } 1158 } else { 1159 LIST_INSERT_HEAD(wpp, nfsd, nd_hash); 1160 } 1161 } 1162 splx(s); 1163 } 1164 1165 /* 1166 * Now, do VOP_WRITE()s for any one(s) that need to be done now 1167 * and generate the associated reply mbuf list(s). 1168 */ 1169 loop1: 1170 getmicrotime(&now); 1171 cur_usec = (u_quad_t)now.tv_sec * 1000000 + (u_quad_t)now.tv_usec; 1172 s = splsoftclock(); 1173 for (nfsd = LIST_FIRST(&slp->ns_tq); nfsd; nfsd = owp) { 1174 owp = LIST_NEXT(nfsd, nd_tq); 1175 if (nfsd->nd_time > cur_usec) 1176 break; 1177 if (nfsd->nd_mreq) 1178 continue; 1179 LIST_REMOVE(nfsd, nd_tq); 1180 LIST_REMOVE(nfsd, nd_hash); 1181 splx(s); 1182 mrep = nfsd->nd_mrep; 1183 nfsd->nd_mrep = NULL; 1184 cred = nfsd->nd_cr; 1185 v3 = (nfsd->nd_flag & ND_NFSV3); 1186 forat_ret = aftat_ret = 1; 1187 error = nfsrv_fhtovp(&nfsd->nd_fh, 1, &vp, cred, slp, 1188 nfsd->nd_nam, &rdonly, (nfsd->nd_flag & ND_KERBAUTH), 1189 FALSE); 1190 if (!error) { 1191 if (v3) 1192 forat_ret = VOP_GETATTR(vp, &forat, cred, lwp); 1193 if (vp->v_type != VREG) { 1194 if (v3) 1195 error = EINVAL; 1196 else 1197 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 1198 } 1199 } else 1200 vp = NULL; 1201 if (!error) { 1202 nqsrv_getl(vp, ND_WRITE); 1203 error = nfsrv_access(vp, VWRITE, cred, rdonly, lwp, 1); 1204 } 1205 1206 if (nfsd->nd_stable == NFSV3WRITE_UNSTABLE) 1207 ioflags = IO_NODELOCKED; 1208 else if (nfsd->nd_stable == NFSV3WRITE_DATASYNC) 1209 ioflags = (IO_SYNC | IO_NODELOCKED); 1210 else 1211 ioflags = (IO_METASYNC | IO_SYNC | IO_NODELOCKED); 1212 uiop->uio_rw = UIO_WRITE; 1213 uiop->uio_offset = nfsd->nd_off; 1214 uiop->uio_resid = nfsd->nd_eoff - nfsd->nd_off; 1215 UIO_SETUP_SYSSPACE(uiop); 1216 if (uiop->uio_resid > 0) { 1217 mp = mrep; 1218 i = 0; 1219 while (mp) { 1220 if (mp->m_len > 0) 1221 i++; 1222 mp = mp->m_next; 1223 } 1224 uiop->uio_iovcnt = i; 1225 iov = malloc(i * sizeof (struct iovec), M_TEMP, M_WAITOK); 1226 uiop->uio_iov = ivp = iov; 1227 mp = mrep; 1228 while (mp) { 1229 if (mp->m_len > 0) { 1230 ivp->iov_base = mtod(mp, caddr_t); 1231 ivp->iov_len = mp->m_len; 1232 ivp++; 1233 } 1234 mp = mp->m_next; 1235 } 1236 if (!error) { 1237 if (vn_start_write(vp, &mntp, V_NOWAIT) != 0) { 1238 VOP_UNLOCK(vp, 0); 1239 vn_start_write(NULL, &mntp, V_WAIT); 1240 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 1241 } 1242 if (!error) { 1243 error = VOP_WRITE(vp, uiop, ioflags, cred); 1244 nfsstats.srvvop_writes++; 1245 vn_finished_write(mntp, 0); 1246 } 1247 } 1248 free((caddr_t)iov, M_TEMP); 1249 } 1250 m_freem(mrep); 1251 if (vp) { 1252 aftat_ret = VOP_GETATTR(vp, &va, cred, lwp); 1253 vput(vp); 1254 } 1255 1256 /* 1257 * Loop around generating replies for all write rpcs that have 1258 * now been completed. 1259 */ 1260 swp = nfsd; 1261 do { 1262 if (error) { 1263 nfsm_writereply(NFSX_WCCDATA(v3), v3); 1264 if (v3) { 1265 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1266 } 1267 } else { 1268 nfsm_writereply(NFSX_PREOPATTR(v3) + 1269 NFSX_POSTOPORFATTR(v3) + 2 * NFSX_UNSIGNED + 1270 NFSX_WRITEVERF(v3), v3); 1271 if (v3) { 1272 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1273 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1274 *tl++ = txdr_unsigned(nfsd->nd_len); 1275 *tl++ = txdr_unsigned(swp->nd_stable); 1276 /* 1277 * Actually, there is no need to txdr these fields, 1278 * but it may make the values more human readable, 1279 * for debugging purposes. 1280 */ 1281 *tl++ = txdr_unsigned(boottime.tv_sec); 1282 *tl = txdr_unsigned(boottime.tv_usec); 1283 } else { 1284 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 1285 nfsm_srvfillattr(&va, fp); 1286 } 1287 } 1288 nfsd->nd_mreq = mreq; 1289 if (nfsd->nd_mrep) 1290 panic("nfsrv_write: nd_mrep not free"); 1291 1292 /* 1293 * Done. Put it at the head of the timer queue so that 1294 * the final phase can return the reply. 1295 */ 1296 s = splsoftclock(); 1297 if (nfsd != swp) { 1298 nfsd->nd_time = 0; 1299 LIST_INSERT_HEAD(&slp->ns_tq, nfsd, nd_tq); 1300 } 1301 nfsd = LIST_FIRST(&swp->nd_coalesce); 1302 if (nfsd) { 1303 LIST_REMOVE(nfsd, nd_tq); 1304 } 1305 splx(s); 1306 } while (nfsd); 1307 s = splsoftclock(); 1308 swp->nd_time = 0; 1309 LIST_INSERT_HEAD(&slp->ns_tq, swp, nd_tq); 1310 splx(s); 1311 goto loop1; 1312 } 1313 splx(s); 1314 1315 /* 1316 * Search for a reply to return. 1317 */ 1318 s = splsoftclock(); 1319 LIST_FOREACH(nfsd, &slp->ns_tq, nd_tq) { 1320 if (nfsd->nd_mreq) { 1321 LIST_REMOVE(nfsd, nd_tq); 1322 *mrq = nfsd->nd_mreq; 1323 *ndp = nfsd; 1324 break; 1325 } 1326 } 1327 splx(s); 1328 return (0); 1329 } 1330 1331 /* 1332 * Coalesce the write request nfsd into owp. To do this we must: 1333 * - remove nfsd from the queues 1334 * - merge nfsd->nd_mrep into owp->nd_mrep 1335 * - update the nd_eoff and nd_stable for owp 1336 * - put nfsd on owp's nd_coalesce list 1337 * NB: Must be called at splsoftclock(). 1338 */ 1339 void 1340 nfsrvw_coalesce(owp, nfsd) 1341 struct nfsrv_descript *owp; 1342 struct nfsrv_descript *nfsd; 1343 { 1344 int overlap; 1345 struct mbuf *mp; 1346 struct nfsrv_descript *m; 1347 1348 LIST_REMOVE(nfsd, nd_hash); 1349 LIST_REMOVE(nfsd, nd_tq); 1350 if (owp->nd_eoff < nfsd->nd_eoff) { 1351 overlap = owp->nd_eoff - nfsd->nd_off; 1352 if (overlap < 0) 1353 panic("nfsrv_coalesce: bad off"); 1354 if (overlap > 0) 1355 m_adj(nfsd->nd_mrep, overlap); 1356 mp = owp->nd_mrep; 1357 while (mp->m_next) 1358 mp = mp->m_next; 1359 mp->m_next = nfsd->nd_mrep; 1360 owp->nd_eoff = nfsd->nd_eoff; 1361 } else 1362 m_freem(nfsd->nd_mrep); 1363 nfsd->nd_mrep = NULL; 1364 if (nfsd->nd_stable == NFSV3WRITE_FILESYNC) 1365 owp->nd_stable = NFSV3WRITE_FILESYNC; 1366 else if (nfsd->nd_stable == NFSV3WRITE_DATASYNC && 1367 owp->nd_stable == NFSV3WRITE_UNSTABLE) 1368 owp->nd_stable = NFSV3WRITE_DATASYNC; 1369 LIST_INSERT_HEAD(&owp->nd_coalesce, nfsd, nd_tq); 1370 /* 1371 * nfsd might hold coalesce elements! Move them to owp. 1372 * Otherwise, requests may be lost and clients will be stuck. 1373 */ 1374 while ((m = LIST_FIRST(&nfsd->nd_coalesce)) != NULL) { 1375 LIST_REMOVE(m, nd_tq); 1376 LIST_INSERT_HEAD(&owp->nd_coalesce, m, nd_tq); 1377 } 1378 } 1379 1380 /* 1381 * nfs create service 1382 * now does a truncate to 0 length via. setattr if it already exists 1383 */ 1384 int 1385 nfsrv_create(nfsd, slp, lwp, mrq) 1386 struct nfsrv_descript *nfsd; 1387 struct nfssvc_sock *slp; 1388 struct lwp *lwp; 1389 struct mbuf **mrq; 1390 { 1391 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1392 struct mbuf *nam = nfsd->nd_nam; 1393 caddr_t dpos = nfsd->nd_dpos; 1394 kauth_cred_t cred = nfsd->nd_cr; 1395 struct nfs_fattr *fp; 1396 struct vattr va, dirfor, diraft; 1397 struct nfsv2_sattr *sp; 1398 u_int32_t *tl; 1399 struct nameidata nd; 1400 caddr_t cp; 1401 int32_t t1; 1402 caddr_t bpos; 1403 int error = 0, cache = 0, len, tsize, dirfor_ret = 1, diraft_ret = 1; 1404 int rdev = 0; 1405 int v3 = (nfsd->nd_flag & ND_NFSV3), how, exclusive_flag = 0; 1406 char *cp2; 1407 struct mbuf *mb, *mreq; 1408 struct vnode *vp = NULL, *dirp = NULL; 1409 nfsrvfh_t nsfh; 1410 u_quad_t frev, tempsize; 1411 u_char cverf[NFSX_V3CREATEVERF]; 1412 struct mount *mp = NULL; 1413 1414 nd.ni_cnd.cn_nameiop = 0; 1415 nfsm_srvmtofh(&nsfh); 1416 if ((mp = vfs_getvfs(&NFSRVFH_FHANDLE(&nsfh)->fh_fsid)) == NULL) 1417 return (ESTALE); 1418 vn_start_write(NULL, &mp, V_WAIT); 1419 nfsm_srvnamesiz(len); 1420 nd.ni_cnd.cn_cred = cred; 1421 nd.ni_cnd.cn_nameiop = CREATE; 1422 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 1423 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 1424 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1425 if (dirp) { 1426 if (v3) 1427 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, lwp); 1428 else { 1429 vrele(dirp); 1430 dirp = (struct vnode *)0; 1431 } 1432 } 1433 if (error) { 1434 nfsm_reply(NFSX_WCCDATA(v3)); 1435 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1436 if (dirp) 1437 vrele(dirp); 1438 vn_finished_write(mp, 0); 1439 return (0); 1440 } 1441 VATTR_NULL(&va); 1442 if (v3) { 1443 va.va_mode = 0; 1444 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1445 how = fxdr_unsigned(int, *tl); 1446 switch (how) { 1447 case NFSV3CREATE_GUARDED: 1448 if (nd.ni_vp) { 1449 error = EEXIST; 1450 break; 1451 } 1452 case NFSV3CREATE_UNCHECKED: 1453 nfsm_srvsattr(&va); 1454 break; 1455 case NFSV3CREATE_EXCLUSIVE: 1456 nfsm_dissect(cp, caddr_t, NFSX_V3CREATEVERF); 1457 memcpy(cverf, cp, NFSX_V3CREATEVERF); 1458 exclusive_flag = 1; 1459 break; 1460 }; 1461 va.va_type = VREG; 1462 } else { 1463 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1464 va.va_type = IFTOVT(fxdr_unsigned(u_int32_t, sp->sa_mode)); 1465 if (va.va_type == VNON) 1466 va.va_type = VREG; 1467 va.va_mode = nfstov_mode(sp->sa_mode); 1468 switch (va.va_type) { 1469 case VREG: 1470 tsize = fxdr_unsigned(int32_t, sp->sa_size); 1471 if (tsize != -1) 1472 va.va_size = (u_quad_t)tsize; 1473 break; 1474 case VCHR: 1475 case VBLK: 1476 case VFIFO: 1477 rdev = fxdr_unsigned(int32_t, sp->sa_size); 1478 break; 1479 default: 1480 break; 1481 }; 1482 } 1483 1484 /* 1485 * Iff doesn't exist, create it 1486 * otherwise just truncate to 0 length 1487 * should I set the mode too ?? 1488 */ 1489 if (nd.ni_vp == NULL) { 1490 if (va.va_type == VREG || va.va_type == VSOCK) { 1491 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1492 error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1493 if (!error) { 1494 if (exclusive_flag) { 1495 exclusive_flag = 0; 1496 VATTR_NULL(&va); 1497 /* 1498 * XXX 1499 * assuming NFSX_V3CREATEVERF 1500 * == sizeof(nfstime3) 1501 */ 1502 fxdr_nfsv3time(cverf, &va.va_atime); 1503 error = VOP_SETATTR(nd.ni_vp, &va, cred, 1504 lwp); 1505 } 1506 } 1507 } else if (va.va_type == VCHR || va.va_type == VBLK || 1508 va.va_type == VFIFO) { 1509 if (va.va_type == VCHR && rdev == 0xffffffff) 1510 va.va_type = VFIFO; 1511 if (va.va_type != VFIFO && 1512 (error = kauth_authorize_generic(cred, 1513 KAUTH_GENERIC_ISSUSER, (u_short *)0))) { 1514 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1515 vput(nd.ni_dvp); 1516 nfsm_reply(0); 1517 vn_finished_write(mp, 0); 1518 return (error); 1519 } else 1520 va.va_rdev = (dev_t)rdev; 1521 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1522 error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, 1523 &va); 1524 if (error) { 1525 nfsm_reply(0); 1526 } 1527 if (nd.ni_cnd.cn_flags & ISSYMLINK) { 1528 vrele(nd.ni_dvp); 1529 vput(nd.ni_vp); 1530 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1531 error = EINVAL; 1532 nfsm_reply(0); 1533 } 1534 } else { 1535 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1536 vput(nd.ni_dvp); 1537 error = ENXIO; 1538 } 1539 vp = nd.ni_vp; 1540 } else { 1541 vp = nd.ni_vp; 1542 if (nd.ni_dvp == vp) 1543 vrele(nd.ni_dvp); 1544 else 1545 vput(nd.ni_dvp); 1546 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1547 if (!error && va.va_size != -1) { 1548 error = nfsrv_access(vp, VWRITE, cred, 1549 (nd.ni_cnd.cn_flags & RDONLY), lwp, 0); 1550 if (!error) { 1551 nqsrv_getl(vp, ND_WRITE); 1552 tempsize = va.va_size; 1553 VATTR_NULL(&va); 1554 va.va_size = tempsize; 1555 error = VOP_SETATTR(vp, &va, cred, lwp); 1556 } 1557 } 1558 if (error) 1559 vput(vp); 1560 } 1561 if (!error) { 1562 error = nfsrv_composefh(vp, &nsfh, v3); 1563 if (!error) 1564 error = VOP_GETATTR(vp, &va, cred, lwp); 1565 vput(vp); 1566 } 1567 if (v3) { 1568 if (exclusive_flag && !error) { 1569 /* 1570 * XXX assuming NFSX_V3CREATEVERF == sizeof(nfstime3) 1571 */ 1572 char oldverf[NFSX_V3CREATEVERF]; 1573 1574 txdr_nfsv3time(&va.va_atime, oldverf); 1575 if (memcmp(cverf, oldverf, NFSX_V3CREATEVERF)) 1576 error = EEXIST; 1577 } 1578 if (dirp) { 1579 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, lwp); 1580 vrele(dirp); 1581 } 1582 } 1583 nfsm_reply(NFSX_SRVFH(&nsfh, v3) + NFSX_FATTR(v3) + NFSX_WCCDATA(v3)); 1584 if (v3) { 1585 if (!error) { 1586 nfsm_srvpostop_fh(&nsfh); 1587 nfsm_srvpostop_attr(0, &va); 1588 } 1589 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1590 } else { 1591 nfsm_srvfhtom(&nsfh, v3); 1592 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 1593 nfsm_srvfillattr(&va, fp); 1594 } 1595 vn_finished_write(mp, 0); 1596 return (0); 1597 nfsmout: 1598 if (dirp) 1599 vrele(dirp); 1600 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1601 if (nd.ni_dvp == nd.ni_vp) 1602 vrele(nd.ni_dvp); 1603 else 1604 vput(nd.ni_dvp); 1605 if (nd.ni_vp) 1606 vput(nd.ni_vp); 1607 vn_finished_write(mp, 0); 1608 return (error); 1609 } 1610 1611 /* 1612 * nfs v3 mknod service 1613 */ 1614 int 1615 nfsrv_mknod(nfsd, slp, lwp, mrq) 1616 struct nfsrv_descript *nfsd; 1617 struct nfssvc_sock *slp; 1618 struct lwp *lwp; 1619 struct mbuf **mrq; 1620 { 1621 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1622 struct mbuf *nam = nfsd->nd_nam; 1623 caddr_t dpos = nfsd->nd_dpos; 1624 kauth_cred_t cred = nfsd->nd_cr; 1625 struct vattr va, dirfor, diraft; 1626 u_int32_t *tl; 1627 struct nameidata nd; 1628 int32_t t1; 1629 caddr_t bpos; 1630 int error = 0, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 1631 u_int32_t major, minor; 1632 enum vtype vtyp; 1633 char *cp2; 1634 struct mbuf *mb, *mreq; 1635 struct vnode *vp, *dirp = (struct vnode *)0; 1636 nfsrvfh_t nsfh; 1637 u_quad_t frev; 1638 struct mount *mp = NULL; 1639 1640 nd.ni_cnd.cn_nameiop = 0; 1641 nfsm_srvmtofh(&nsfh); 1642 if ((mp = vfs_getvfs(&NFSRVFH_FHANDLE(&nsfh)->fh_fsid)) == NULL) 1643 return (ESTALE); 1644 vn_start_write(NULL, &mp, V_WAIT); 1645 nfsm_srvnamesiz(len); 1646 nd.ni_cnd.cn_cred = cred; 1647 nd.ni_cnd.cn_nameiop = CREATE; 1648 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 1649 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 1650 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1651 if (dirp) 1652 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, lwp); 1653 if (error) { 1654 nfsm_reply(NFSX_WCCDATA(1)); 1655 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1656 if (dirp) 1657 vrele(dirp); 1658 vn_finished_write(mp, 0); 1659 return (0); 1660 } 1661 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1662 vtyp = nfsv3tov_type(*tl); 1663 if (vtyp != VCHR && vtyp != VBLK && vtyp != VSOCK && vtyp != VFIFO) { 1664 error = NFSERR_BADTYPE; 1665 goto abort; 1666 } 1667 VATTR_NULL(&va); 1668 va.va_mode = 0; 1669 nfsm_srvsattr(&va); 1670 if (vtyp == VCHR || vtyp == VBLK) { 1671 dev_t rdev; 1672 1673 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1674 major = fxdr_unsigned(u_int32_t, *tl++); 1675 minor = fxdr_unsigned(u_int32_t, *tl); 1676 rdev = makedev(major, minor); 1677 if (major(rdev) != major || minor(rdev) != minor) { 1678 error = EINVAL; 1679 goto abort; 1680 } 1681 va.va_rdev = rdev; 1682 } 1683 1684 /* 1685 * Iff doesn't exist, create it. 1686 */ 1687 if (nd.ni_vp) { 1688 error = EEXIST; 1689 abort: 1690 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1691 if (nd.ni_dvp == nd.ni_vp) 1692 vrele(nd.ni_dvp); 1693 else 1694 vput(nd.ni_dvp); 1695 if (nd.ni_vp) 1696 vput(nd.ni_vp); 1697 goto out; 1698 } 1699 va.va_type = vtyp; 1700 if (vtyp == VSOCK) { 1701 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1702 error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1703 } else { 1704 if (va.va_type != VFIFO && 1705 (error = kauth_authorize_generic(cred, 1706 KAUTH_GENERIC_ISSUSER, (u_short *)0))) { 1707 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1708 vput(nd.ni_dvp); 1709 goto out; 1710 } 1711 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1712 error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1713 if (error) 1714 goto out; 1715 if (nd.ni_cnd.cn_flags & ISSYMLINK) { 1716 vput(nd.ni_vp); 1717 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1718 error = EINVAL; 1719 } 1720 } 1721 out: 1722 vp = nd.ni_vp; 1723 if (!error) { 1724 error = nfsrv_composefh(vp, &nsfh, TRUE); 1725 if (!error) 1726 error = VOP_GETATTR(vp, &va, cred, lwp); 1727 vput(vp); 1728 } 1729 if (dirp) { 1730 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, lwp); 1731 vrele(dirp); 1732 } 1733 nfsm_reply(NFSX_SRVFH(&nsfh, TRUE) + NFSX_POSTOPATTR(1) + 1734 NFSX_WCCDATA(1)); 1735 if (!error) { 1736 nfsm_srvpostop_fh(&nsfh); 1737 nfsm_srvpostop_attr(0, &va); 1738 } 1739 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1740 vn_finished_write(mp, 0); 1741 return (0); 1742 nfsmout: 1743 if (dirp) 1744 vrele(dirp); 1745 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1746 if (nd.ni_dvp == nd.ni_vp) 1747 vrele(nd.ni_dvp); 1748 else 1749 vput(nd.ni_dvp); 1750 if (nd.ni_vp) 1751 vput(nd.ni_vp); 1752 vn_finished_write(mp, 0); 1753 return (error); 1754 } 1755 1756 /* 1757 * nfs remove service 1758 */ 1759 int 1760 nfsrv_remove(nfsd, slp, lwp, mrq) 1761 struct nfsrv_descript *nfsd; 1762 struct nfssvc_sock *slp; 1763 struct lwp *lwp; 1764 struct mbuf **mrq; 1765 { 1766 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1767 struct mbuf *nam = nfsd->nd_nam; 1768 caddr_t dpos = nfsd->nd_dpos; 1769 kauth_cred_t cred = nfsd->nd_cr; 1770 struct nameidata nd; 1771 u_int32_t *tl; 1772 int32_t t1; 1773 caddr_t bpos; 1774 int error = 0, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 1775 int v3 = (nfsd->nd_flag & ND_NFSV3); 1776 char *cp2; 1777 struct mbuf *mb, *mreq; 1778 struct vnode *vp, *dirp; 1779 struct vattr dirfor, diraft; 1780 nfsrvfh_t nsfh; 1781 u_quad_t frev; 1782 struct mount *mp = NULL; 1783 1784 #ifndef nolint 1785 vp = (struct vnode *)0; 1786 #endif 1787 nfsm_srvmtofh(&nsfh); 1788 if ((mp = vfs_getvfs(&NFSRVFH_FHANDLE(&nsfh)->fh_fsid)) == NULL) 1789 return (ESTALE); 1790 vn_start_write(NULL, &mp, V_WAIT); 1791 nfsm_srvnamesiz(len); 1792 nd.ni_cnd.cn_cred = cred; 1793 nd.ni_cnd.cn_nameiop = DELETE; 1794 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 1795 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 1796 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1797 if (dirp) { 1798 if (v3) 1799 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, lwp); 1800 else 1801 vrele(dirp); 1802 } 1803 if (!error) { 1804 vp = nd.ni_vp; 1805 if (vp->v_type == VDIR && 1806 (error = kauth_authorize_generic(cred, 1807 KAUTH_GENERIC_ISSUSER, (u_short *)0)) != 0) 1808 goto out; 1809 /* 1810 * The root of a mounted filesystem cannot be deleted. 1811 */ 1812 if (vp->v_flag & VROOT) { 1813 error = EBUSY; 1814 goto out; 1815 } 1816 out: 1817 if (!error) { 1818 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1819 nqsrv_getl(vp, ND_WRITE); 1820 error = VOP_REMOVE(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); 1821 } else { 1822 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1823 if (nd.ni_dvp == vp) 1824 vrele(nd.ni_dvp); 1825 else 1826 vput(nd.ni_dvp); 1827 vput(vp); 1828 } 1829 } 1830 if (dirp && v3) { 1831 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, lwp); 1832 vrele(dirp); 1833 } 1834 nfsm_reply(NFSX_WCCDATA(v3)); 1835 if (v3) { 1836 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1837 vn_finished_write(mp, 0); 1838 return (0); 1839 } 1840 vn_finished_write(mp, 0); 1841 nfsm_srvdone; 1842 } 1843 1844 /* 1845 * nfs rename service 1846 */ 1847 int 1848 nfsrv_rename(nfsd, slp, lwp, mrq) 1849 struct nfsrv_descript *nfsd; 1850 struct nfssvc_sock *slp; 1851 struct lwp *lwp; 1852 struct mbuf **mrq; 1853 { 1854 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1855 struct mbuf *nam = nfsd->nd_nam; 1856 caddr_t dpos = nfsd->nd_dpos; 1857 kauth_cred_t cred = nfsd->nd_cr; 1858 u_int32_t *tl; 1859 int32_t t1; 1860 caddr_t bpos; 1861 int error = 0, cache = 0, fdirfor_ret = 1, fdiraft_ret = 1; 1862 uint32_t len, len2; 1863 int tdirfor_ret = 1, tdiraft_ret = 1; 1864 int v3 = (nfsd->nd_flag & ND_NFSV3); 1865 char *cp2; 1866 struct mbuf *mb, *mreq; 1867 struct nameidata fromnd, tond; 1868 struct vnode *fvp, *tvp, *tdvp, *fdirp = (struct vnode *)0; 1869 struct vnode *tdirp = (struct vnode *)0; 1870 struct vattr fdirfor, fdiraft, tdirfor, tdiraft; 1871 nfsrvfh_t fnsfh, tnsfh; 1872 u_quad_t frev; 1873 uid_t saved_uid; 1874 struct mount *mp = NULL; 1875 1876 #ifndef nolint 1877 fvp = (struct vnode *)0; 1878 #endif 1879 fromnd.ni_cnd.cn_nameiop = 0; 1880 tond.ni_cnd.cn_nameiop = 0; 1881 nfsm_srvmtofh(&fnsfh); 1882 if ((mp = vfs_getvfs(&NFSRVFH_FHANDLE(&fnsfh)->fh_fsid)) == NULL) 1883 return (ESTALE); 1884 vn_start_write(NULL, &mp, V_WAIT); 1885 nfsm_srvnamesiz(len); 1886 /* 1887 * Remember our original uid so that we can reset cr_uid before 1888 * the second nfs_namei() call, in case it is remapped. 1889 */ 1890 saved_uid = kauth_cred_geteuid(cred); 1891 fromnd.ni_cnd.cn_cred = cred; 1892 fromnd.ni_cnd.cn_nameiop = DELETE; 1893 fromnd.ni_cnd.cn_flags = WANTPARENT | SAVESTART; 1894 error = nfs_namei(&fromnd, &fnsfh, len, slp, nam, &md, 1895 &dpos, &fdirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1896 if (fdirp) { 1897 if (v3) 1898 fdirfor_ret = VOP_GETATTR(fdirp, &fdirfor, cred, lwp); 1899 else { 1900 vrele(fdirp); 1901 fdirp = (struct vnode *)0; 1902 } 1903 } 1904 if (error) { 1905 nfsm_reply(2 * NFSX_WCCDATA(v3)); 1906 nfsm_srvwcc_data(fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft); 1907 nfsm_srvwcc_data(tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft); 1908 if (fdirp) 1909 vrele(fdirp); 1910 vn_finished_write(mp, 0); 1911 return (0); 1912 } 1913 fvp = fromnd.ni_vp; 1914 nfsm_srvmtofh(&tnsfh); 1915 if (v3) { 1916 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 1917 len2 = fxdr_unsigned(uint32_t, *tl); 1918 /* len2 will be checked by nfs_namei */ 1919 } 1920 else { 1921 /* NFSv2 */ 1922 nfsm_strsiz(len2, NFS_MAXNAMLEN); 1923 } 1924 kauth_cred_seteuid(cred, saved_uid); 1925 tond.ni_cnd.cn_cred = cred; 1926 tond.ni_cnd.cn_nameiop = RENAME; 1927 tond.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF | NOCACHE | SAVESTART; 1928 error = nfs_namei(&tond, &tnsfh, len2, slp, nam, &md, 1929 &dpos, &tdirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1930 if (tdirp) { 1931 if (v3) 1932 tdirfor_ret = VOP_GETATTR(tdirp, &tdirfor, cred, lwp); 1933 else { 1934 vrele(tdirp); 1935 tdirp = (struct vnode *)0; 1936 } 1937 } 1938 if (error) { 1939 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 1940 vrele(fromnd.ni_dvp); 1941 vrele(fvp); 1942 goto out1; 1943 } 1944 tdvp = tond.ni_dvp; 1945 tvp = tond.ni_vp; 1946 if (tvp != NULL) { 1947 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 1948 if (v3) 1949 error = EEXIST; 1950 else 1951 error = EISDIR; 1952 goto out; 1953 } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 1954 if (v3) 1955 error = EEXIST; 1956 else 1957 error = ENOTDIR; 1958 goto out; 1959 } 1960 if (tvp->v_type == VDIR && tvp->v_mountedhere) { 1961 if (v3) 1962 error = EXDEV; 1963 else 1964 error = ENOTEMPTY; 1965 goto out; 1966 } 1967 } 1968 if (fvp->v_type == VDIR && fvp->v_mountedhere) { 1969 if (v3) 1970 error = EXDEV; 1971 else 1972 error = ENOTEMPTY; 1973 goto out; 1974 } 1975 if (fvp->v_mount != tdvp->v_mount) { 1976 if (v3) 1977 error = EXDEV; 1978 else 1979 error = ENOTEMPTY; 1980 goto out; 1981 } 1982 if (fvp == tdvp) { 1983 if (v3) 1984 error = EINVAL; 1985 else 1986 error = ENOTEMPTY; 1987 } 1988 /* 1989 * If source is the same as the destination (that is the 1990 * same vnode with the same name in the same directory), 1991 * then there is nothing to do. 1992 */ 1993 if (fvp == tvp && fromnd.ni_dvp == tdvp && 1994 fromnd.ni_cnd.cn_namelen == tond.ni_cnd.cn_namelen && 1995 !memcmp(fromnd.ni_cnd.cn_nameptr, tond.ni_cnd.cn_nameptr, 1996 fromnd.ni_cnd.cn_namelen)) 1997 error = -1; 1998 out: 1999 if (!error) { 2000 nqsrv_getl(fromnd.ni_dvp, ND_WRITE); 2001 nqsrv_getl(tdvp, ND_WRITE); 2002 if (tvp) { 2003 nqsrv_getl(tvp, ND_WRITE); 2004 } 2005 error = VOP_RENAME(fromnd.ni_dvp, fromnd.ni_vp, &fromnd.ni_cnd, 2006 tond.ni_dvp, tond.ni_vp, &tond.ni_cnd); 2007 } else { 2008 VOP_ABORTOP(tond.ni_dvp, &tond.ni_cnd); 2009 if (tdvp == tvp) 2010 vrele(tdvp); 2011 else 2012 vput(tdvp); 2013 if (tvp) 2014 vput(tvp); 2015 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 2016 vrele(fromnd.ni_dvp); 2017 vrele(fvp); 2018 if (error == -1) 2019 error = 0; 2020 } 2021 vrele(tond.ni_startdir); 2022 PNBUF_PUT(tond.ni_cnd.cn_pnbuf); 2023 out1: 2024 if (fdirp) { 2025 fdiraft_ret = VOP_GETATTR(fdirp, &fdiraft, cred, lwp); 2026 vrele(fdirp); 2027 } 2028 if (tdirp) { 2029 tdiraft_ret = VOP_GETATTR(tdirp, &tdiraft, cred, lwp); 2030 vrele(tdirp); 2031 } 2032 vrele(fromnd.ni_startdir); 2033 PNBUF_PUT(fromnd.ni_cnd.cn_pnbuf); 2034 nfsm_reply(2 * NFSX_WCCDATA(v3)); 2035 if (v3) { 2036 nfsm_srvwcc_data(fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft); 2037 nfsm_srvwcc_data(tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft); 2038 } 2039 vn_finished_write(mp, 0); 2040 return (0); 2041 2042 nfsmout: 2043 if (fdirp) 2044 vrele(fdirp); 2045 #ifdef notdef 2046 if (tdirp) 2047 vrele(tdirp); 2048 #endif 2049 if (tond.ni_cnd.cn_nameiop) { 2050 vrele(tond.ni_startdir); 2051 PNBUF_PUT(tond.ni_cnd.cn_pnbuf); 2052 } 2053 if (fromnd.ni_cnd.cn_nameiop) { 2054 vrele(fromnd.ni_startdir); 2055 PNBUF_PUT(fromnd.ni_cnd.cn_pnbuf); 2056 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 2057 vrele(fromnd.ni_dvp); 2058 vrele(fvp); 2059 } 2060 return (error); 2061 } 2062 2063 /* 2064 * nfs link service 2065 */ 2066 int 2067 nfsrv_link(nfsd, slp, lwp, mrq) 2068 struct nfsrv_descript *nfsd; 2069 struct nfssvc_sock *slp; 2070 struct lwp *lwp; 2071 struct mbuf **mrq; 2072 { 2073 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2074 struct mbuf *nam = nfsd->nd_nam; 2075 caddr_t dpos = nfsd->nd_dpos; 2076 kauth_cred_t cred = nfsd->nd_cr; 2077 struct nameidata nd; 2078 u_int32_t *tl; 2079 int32_t t1; 2080 caddr_t bpos; 2081 int error = 0, rdonly, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 2082 int getret = 1, v3 = (nfsd->nd_flag & ND_NFSV3); 2083 char *cp2; 2084 struct mbuf *mb, *mreq; 2085 struct vnode *vp, *xp, *dirp = (struct vnode *)0; 2086 struct vattr dirfor, diraft, at; 2087 nfsrvfh_t nsfh, dnsfh; 2088 u_quad_t frev; 2089 struct mount *mp = NULL; 2090 2091 nfsm_srvmtofh(&nsfh); 2092 if ((mp = vfs_getvfs(&NFSRVFH_FHANDLE(&nsfh)->fh_fsid)) == NULL) 2093 return (ESTALE); 2094 vn_start_write(NULL, &mp, V_WAIT); 2095 nfsm_srvmtofh(&dnsfh); 2096 nfsm_srvnamesiz(len); 2097 error = nfsrv_fhtovp(&nsfh, FALSE, &vp, cred, slp, nam, 2098 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2099 if (error) { 2100 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2101 nfsm_srvpostop_attr(getret, &at); 2102 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2103 vn_finished_write(mp, 0); 2104 return (0); 2105 } 2106 if (vp->v_type == VDIR && (error = kauth_authorize_generic(cred, 2107 KAUTH_GENERIC_ISSUSER, (u_short *)0)) != 0) 2108 goto out1; 2109 nd.ni_cnd.cn_cred = cred; 2110 nd.ni_cnd.cn_nameiop = CREATE; 2111 nd.ni_cnd.cn_flags = LOCKPARENT; 2112 error = nfs_namei(&nd, &dnsfh, len, slp, nam, &md, &dpos, 2113 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2114 if (dirp) { 2115 if (v3) 2116 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, lwp); 2117 else { 2118 vrele(dirp); 2119 dirp = (struct vnode *)0; 2120 } 2121 } 2122 if (error) 2123 goto out1; 2124 xp = nd.ni_vp; 2125 if (xp != NULL) { 2126 error = EEXIST; 2127 goto out; 2128 } 2129 xp = nd.ni_dvp; 2130 if (vp->v_mount != xp->v_mount) 2131 error = EXDEV; 2132 out: 2133 if (!error) { 2134 nqsrv_getl(vp, ND_WRITE); 2135 nqsrv_getl(xp, ND_WRITE); 2136 error = VOP_LINK(nd.ni_dvp, vp, &nd.ni_cnd); 2137 } else { 2138 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2139 if (nd.ni_dvp == nd.ni_vp) 2140 vrele(nd.ni_dvp); 2141 else 2142 vput(nd.ni_dvp); 2143 if (nd.ni_vp) 2144 vrele(nd.ni_vp); 2145 } 2146 out1: 2147 if (v3) 2148 getret = VOP_GETATTR(vp, &at, cred, lwp); 2149 if (dirp) { 2150 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, lwp); 2151 vrele(dirp); 2152 } 2153 vrele(vp); 2154 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2155 if (v3) { 2156 nfsm_srvpostop_attr(getret, &at); 2157 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2158 vn_finished_write(mp, 0); 2159 return (0); 2160 } 2161 vn_finished_write(mp, 0); 2162 nfsm_srvdone; 2163 } 2164 2165 /* 2166 * nfs symbolic link service 2167 */ 2168 int 2169 nfsrv_symlink(nfsd, slp, lwp, mrq) 2170 struct nfsrv_descript *nfsd; 2171 struct nfssvc_sock *slp; 2172 struct lwp *lwp; 2173 struct mbuf **mrq; 2174 { 2175 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2176 struct mbuf *nam = nfsd->nd_nam; 2177 caddr_t dpos = nfsd->nd_dpos; 2178 kauth_cred_t cred = nfsd->nd_cr; 2179 struct vattr va, dirfor, diraft; 2180 struct nameidata nd; 2181 u_int32_t *tl; 2182 int32_t t1; 2183 struct nfsv2_sattr *sp; 2184 char *bpos, *pathcp = NULL, *cp2; 2185 struct uio io; 2186 struct iovec iv; 2187 int error = 0, cache = 0, dirfor_ret = 1, diraft_ret = 1; 2188 uint32_t len, len2; 2189 int v3 = (nfsd->nd_flag & ND_NFSV3); 2190 struct mbuf *mb, *mreq; 2191 struct vnode *dirp = (struct vnode *)0; 2192 nfsrvfh_t nsfh; 2193 u_quad_t frev; 2194 struct mount *mp = NULL; 2195 2196 nd.ni_cnd.cn_nameiop = 0; 2197 nfsm_srvmtofh(&nsfh); 2198 if ((mp = vfs_getvfs(&NFSRVFH_FHANDLE(&nsfh)->fh_fsid)) == NULL) 2199 return (ESTALE); 2200 vn_start_write(NULL, &mp, V_WAIT); 2201 nfsm_srvnamesiz(len); 2202 nd.ni_cnd.cn_cred = cred; 2203 nd.ni_cnd.cn_nameiop = CREATE; 2204 nd.ni_cnd.cn_flags = LOCKPARENT; 2205 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 2206 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2207 if (dirp) { 2208 if (v3) 2209 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, lwp); 2210 else { 2211 vrele(dirp); 2212 dirp = (struct vnode *)0; 2213 } 2214 } 2215 if (error) 2216 goto out; 2217 VATTR_NULL(&va); 2218 va.va_type = VLNK; 2219 if (v3) { 2220 va.va_mode = 0; 2221 nfsm_srvsattr(&va); 2222 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 2223 len2 = fxdr_unsigned(uint32_t, *tl); 2224 if (len2 > PATH_MAX) { 2225 /* XXX should check _PC_NO_TRUNC */ 2226 error = ENAMETOOLONG; 2227 goto abortop; 2228 } 2229 } 2230 else { 2231 /* NFSv2 */ 2232 nfsm_strsiz(len2, NFS_MAXPATHLEN); 2233 } 2234 pathcp = malloc(len2 + 1, M_TEMP, M_WAITOK); 2235 iv.iov_base = pathcp; 2236 iv.iov_len = len2; 2237 io.uio_resid = len2; 2238 io.uio_offset = 0; 2239 io.uio_iov = &iv; 2240 io.uio_iovcnt = 1; 2241 io.uio_rw = UIO_READ; 2242 UIO_SETUP_SYSSPACE(&io); 2243 nfsm_mtouio(&io, len2); 2244 if (!v3) { 2245 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2246 va.va_mode = fxdr_unsigned(u_int16_t, sp->sa_mode); 2247 } 2248 *(pathcp + len2) = '\0'; 2249 if (nd.ni_vp) { 2250 error = EEXIST; 2251 abortop: 2252 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2253 if (nd.ni_dvp == nd.ni_vp) 2254 vrele(nd.ni_dvp); 2255 else 2256 vput(nd.ni_dvp); 2257 if (nd.ni_vp) 2258 vrele(nd.ni_vp); 2259 goto out; 2260 } 2261 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2262 error = VOP_SYMLINK(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va, pathcp); 2263 if (!error) { 2264 if (v3) { 2265 error = nfsrv_composefh(nd.ni_vp, &nsfh, v3); 2266 if (!error) 2267 error = VOP_GETATTR(nd.ni_vp, &va, cred, lwp); 2268 vput(nd.ni_vp); 2269 } else { 2270 vput(nd.ni_vp); 2271 } 2272 } 2273 out: 2274 if (pathcp) 2275 free(pathcp, M_TEMP); 2276 if (dirp) { 2277 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, lwp); 2278 vrele(dirp); 2279 } 2280 nfsm_reply(NFSX_SRVFH(&nsfh, v3) + NFSX_POSTOPATTR(v3) + 2281 NFSX_WCCDATA(v3)); 2282 if (v3) { 2283 if (!error) { 2284 nfsm_srvpostop_fh(&nsfh); 2285 nfsm_srvpostop_attr(0, &va); 2286 } 2287 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2288 } 2289 vn_finished_write(mp, 0); 2290 return (0); 2291 nfsmout: 2292 if (dirp) 2293 vrele(dirp); 2294 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2295 if (nd.ni_dvp == nd.ni_vp) 2296 vrele(nd.ni_dvp); 2297 else 2298 vput(nd.ni_dvp); 2299 if (nd.ni_vp) 2300 vrele(nd.ni_vp); 2301 if (pathcp) 2302 free(pathcp, M_TEMP); 2303 vn_finished_write(mp, 0); 2304 return (error); 2305 } 2306 2307 /* 2308 * nfs mkdir service 2309 */ 2310 int 2311 nfsrv_mkdir(nfsd, slp, lwp, mrq) 2312 struct nfsrv_descript *nfsd; 2313 struct nfssvc_sock *slp; 2314 struct lwp *lwp; 2315 struct mbuf **mrq; 2316 { 2317 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2318 struct mbuf *nam = nfsd->nd_nam; 2319 caddr_t dpos = nfsd->nd_dpos; 2320 kauth_cred_t cred = nfsd->nd_cr; 2321 struct vattr va, dirfor, diraft; 2322 struct nfs_fattr *fp; 2323 struct nameidata nd; 2324 caddr_t cp; 2325 u_int32_t *tl; 2326 int32_t t1; 2327 caddr_t bpos; 2328 int error = 0, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 2329 int v3 = (nfsd->nd_flag & ND_NFSV3); 2330 char *cp2; 2331 struct mbuf *mb, *mreq; 2332 struct vnode *vp, *dirp = (struct vnode *)0; 2333 nfsrvfh_t nsfh; 2334 u_quad_t frev; 2335 struct mount *mp = NULL; 2336 2337 nfsm_srvmtofh(&nsfh); 2338 if ((mp = vfs_getvfs(&NFSRVFH_FHANDLE(&nsfh)->fh_fsid)) == NULL) 2339 return (ESTALE); 2340 vn_start_write(NULL, &mp, V_WAIT); 2341 nfsm_srvnamesiz(len); 2342 nd.ni_cnd.cn_cred = cred; 2343 nd.ni_cnd.cn_nameiop = CREATE; 2344 nd.ni_cnd.cn_flags = LOCKPARENT; 2345 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 2346 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2347 if (dirp) { 2348 if (v3) 2349 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, lwp); 2350 else { 2351 vrele(dirp); 2352 dirp = (struct vnode *)0; 2353 } 2354 } 2355 if (error) { 2356 nfsm_reply(NFSX_WCCDATA(v3)); 2357 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2358 if (dirp) 2359 vrele(dirp); 2360 vn_finished_write(mp, 0); 2361 return (0); 2362 } 2363 VATTR_NULL(&va); 2364 if (v3) { 2365 va.va_mode = 0; 2366 nfsm_srvsattr(&va); 2367 } else { 2368 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2369 va.va_mode = nfstov_mode(*tl++); 2370 } 2371 va.va_type = VDIR; 2372 vp = nd.ni_vp; 2373 if (vp != NULL) { 2374 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2375 if (nd.ni_dvp == vp) 2376 vrele(nd.ni_dvp); 2377 else 2378 vput(nd.ni_dvp); 2379 vrele(vp); 2380 error = EEXIST; 2381 goto out; 2382 } 2383 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2384 error = VOP_MKDIR(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 2385 if (!error) { 2386 vp = nd.ni_vp; 2387 error = nfsrv_composefh(vp, &nsfh, v3); 2388 if (!error) 2389 error = VOP_GETATTR(vp, &va, cred, lwp); 2390 vput(vp); 2391 } 2392 out: 2393 if (dirp) { 2394 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, lwp); 2395 vrele(dirp); 2396 } 2397 nfsm_reply(NFSX_SRVFH(&nsfh, v3) + NFSX_POSTOPATTR(v3) + 2398 NFSX_WCCDATA(v3)); 2399 if (v3) { 2400 if (!error) { 2401 nfsm_srvpostop_fh(&nsfh); 2402 nfsm_srvpostop_attr(0, &va); 2403 } 2404 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2405 } else { 2406 nfsm_srvfhtom(&nsfh, v3); 2407 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 2408 nfsm_srvfillattr(&va, fp); 2409 } 2410 vn_finished_write(mp, 0); 2411 return (0); 2412 nfsmout: 2413 if (dirp) 2414 vrele(dirp); 2415 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2416 if (nd.ni_dvp == nd.ni_vp) 2417 vrele(nd.ni_dvp); 2418 else 2419 vput(nd.ni_dvp); 2420 if (nd.ni_vp) 2421 vrele(nd.ni_vp); 2422 vn_finished_write(mp, 0); 2423 return (error); 2424 } 2425 2426 /* 2427 * nfs rmdir service 2428 */ 2429 int 2430 nfsrv_rmdir(nfsd, slp, lwp, mrq) 2431 struct nfsrv_descript *nfsd; 2432 struct nfssvc_sock *slp; 2433 struct lwp *lwp; 2434 struct mbuf **mrq; 2435 { 2436 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2437 struct mbuf *nam = nfsd->nd_nam; 2438 caddr_t dpos = nfsd->nd_dpos; 2439 kauth_cred_t cred = nfsd->nd_cr; 2440 u_int32_t *tl; 2441 int32_t t1; 2442 caddr_t bpos; 2443 int error = 0, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 2444 int v3 = (nfsd->nd_flag & ND_NFSV3); 2445 char *cp2; 2446 struct mbuf *mb, *mreq; 2447 struct vnode *vp, *dirp = (struct vnode *)0; 2448 struct vattr dirfor, diraft; 2449 nfsrvfh_t nsfh; 2450 struct nameidata nd; 2451 u_quad_t frev; 2452 struct mount *mp = NULL; 2453 2454 nfsm_srvmtofh(&nsfh); 2455 if ((mp = vfs_getvfs(&NFSRVFH_FHANDLE(&nsfh)->fh_fsid)) == NULL) 2456 return (ESTALE); 2457 vn_start_write(NULL, &mp, V_WAIT); 2458 nfsm_srvnamesiz(len); 2459 nd.ni_cnd.cn_cred = cred; 2460 nd.ni_cnd.cn_nameiop = DELETE; 2461 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 2462 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 2463 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2464 if (dirp) { 2465 if (v3) 2466 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, lwp); 2467 else { 2468 vrele(dirp); 2469 dirp = (struct vnode *)0; 2470 } 2471 } 2472 if (error) { 2473 nfsm_reply(NFSX_WCCDATA(v3)); 2474 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2475 if (dirp) 2476 vrele(dirp); 2477 vn_finished_write(mp, 0); 2478 return (0); 2479 } 2480 vp = nd.ni_vp; 2481 if (vp->v_type != VDIR) { 2482 error = ENOTDIR; 2483 goto out; 2484 } 2485 /* 2486 * No rmdir "." please. 2487 */ 2488 if (nd.ni_dvp == vp) { 2489 error = EINVAL; 2490 goto out; 2491 } 2492 /* 2493 * The root of a mounted filesystem cannot be deleted. 2494 */ 2495 if (vp->v_flag & VROOT) 2496 error = EBUSY; 2497 out: 2498 if (!error) { 2499 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2500 nqsrv_getl(vp, ND_WRITE); 2501 error = VOP_RMDIR(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); 2502 } else { 2503 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2504 if (nd.ni_dvp == nd.ni_vp) 2505 vrele(nd.ni_dvp); 2506 else 2507 vput(nd.ni_dvp); 2508 vput(vp); 2509 } 2510 if (dirp) { 2511 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, lwp); 2512 vrele(dirp); 2513 } 2514 nfsm_reply(NFSX_WCCDATA(v3)); 2515 if (v3) { 2516 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2517 vn_finished_write(mp, 0); 2518 return (0); 2519 } 2520 vn_finished_write(mp, 0); 2521 nfsm_srvdone; 2522 } 2523 2524 /* 2525 * nfs readdir service 2526 * - mallocs what it thinks is enough to read 2527 * count rounded up to a multiple of NFS_SRVDIRBLKSIZ <= NFS_MAXREADDIR 2528 * - calls VOP_READDIR() 2529 * - loops around building the reply 2530 * if the output generated exceeds count break out of loop 2531 * The nfsm_clget macro is used here so that the reply will be packed 2532 * tightly in mbuf clusters. 2533 * - it only knows that it has encountered eof when the VOP_READDIR() 2534 * reads nothing 2535 * - as such one readdir rpc will return eof false although you are there 2536 * and then the next will return eof 2537 * - it trims out records with d_fileno == 0 2538 * this doesn't matter for Unix clients, but they might confuse clients 2539 * for other os'. 2540 * - it trims out records with d_type == DT_WHT 2541 * these cannot be seen through NFS (unless we extend the protocol) 2542 * NB: It is tempting to set eof to true if the VOP_READDIR() reads less 2543 * than requested, but this may not apply to all filesystems. For 2544 * example, client NFS does not { although it is never remote mounted 2545 * anyhow } 2546 * The alternate call nfsrv_readdirplus() does lookups as well. 2547 * PS: The NFS protocol spec. does not clarify what the "count" byte 2548 * argument is a count of.. just name strings and file id's or the 2549 * entire reply rpc or ... 2550 * I tried just file name and id sizes and it confused the Sun client, 2551 * so I am using the full rpc size now. The "paranoia.." comment refers 2552 * to including the status longwords that are not a part of the dir. 2553 * "entry" structures, but are in the rpc. 2554 */ 2555 2556 #define NFS_SRVDIRBLKSIZ 1024 2557 2558 struct flrep { 2559 nfsuint64 fl_off; 2560 u_int32_t fl_postopok; 2561 u_int32_t fl_fattr[NFSX_V3FATTR / sizeof (u_int32_t)]; 2562 u_int32_t fl_fhok; 2563 u_int32_t fl_fhsize; 2564 }; 2565 2566 int 2567 nfsrv_readdir(nfsd, slp, lwp, mrq) 2568 struct nfsrv_descript *nfsd; 2569 struct nfssvc_sock *slp; 2570 struct lwp *lwp; 2571 struct mbuf **mrq; 2572 { 2573 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2574 struct mbuf *nam = nfsd->nd_nam; 2575 caddr_t dpos = nfsd->nd_dpos; 2576 kauth_cred_t cred = nfsd->nd_cr; 2577 char *bp, *be; 2578 struct mbuf *mp; 2579 struct dirent *dp; 2580 caddr_t cp; 2581 u_int32_t *tl; 2582 int32_t t1; 2583 caddr_t bpos; 2584 struct mbuf *mb, *mreq, *mp2; 2585 char *cpos, *cend, *cp2, *rbuf; 2586 struct vnode *vp; 2587 struct vattr at; 2588 nfsrvfh_t nsfh; 2589 struct uio io; 2590 struct iovec iv; 2591 int len, nlen, rem, xfer, tsiz, i, error = 0, getret = 1; 2592 int siz, cnt, fullsiz, eofflag, rdonly, cache = 0, ncookies; 2593 int v3 = (nfsd->nd_flag & ND_NFSV3); 2594 u_quad_t frev, off, toff, verf; 2595 off_t *cookies = NULL, *cookiep; 2596 nfsuint64 jar; 2597 2598 nfsm_srvmtofh(&nsfh); 2599 if (v3) { 2600 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 2601 toff = fxdr_hyper(tl); 2602 tl += 2; 2603 verf = fxdr_hyper(tl); 2604 tl += 2; 2605 } else { 2606 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2607 toff = fxdr_unsigned(u_quad_t, *tl++); 2608 } 2609 off = toff; 2610 cnt = fxdr_unsigned(int, *tl); 2611 siz = ((cnt + NFS_SRVDIRBLKSIZ - 1) & ~(NFS_SRVDIRBLKSIZ - 1)); 2612 xfer = NFS_SRVMAXDATA(nfsd); 2613 if (siz > xfer) 2614 siz = xfer; 2615 fullsiz = siz; 2616 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 2617 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2618 if (!error && vp->v_type != VDIR) { 2619 error = ENOTDIR; 2620 vput(vp); 2621 } 2622 if (error) { 2623 nfsm_reply(NFSX_UNSIGNED); 2624 nfsm_srvpostop_attr(getret, &at); 2625 return (0); 2626 } 2627 nqsrv_getl(vp, ND_READ); 2628 if (v3) { 2629 error = getret = VOP_GETATTR(vp, &at, cred, lwp); 2630 #ifdef NFS3_STRICTVERF 2631 /* 2632 * XXX This check is too strict for Solaris 2.5 clients. 2633 */ 2634 if (!error && toff && verf != at.va_filerev) 2635 error = NFSERR_BAD_COOKIE; 2636 #endif 2637 } 2638 if (!error) 2639 error = nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 0); 2640 if (error) { 2641 vput(vp); 2642 nfsm_reply(NFSX_POSTOPATTR(v3)); 2643 nfsm_srvpostop_attr(getret, &at); 2644 return (0); 2645 } 2646 VOP_UNLOCK(vp, 0); 2647 rbuf = malloc(siz, M_TEMP, M_WAITOK); 2648 again: 2649 iv.iov_base = rbuf; 2650 iv.iov_len = fullsiz; 2651 io.uio_iov = &iv; 2652 io.uio_iovcnt = 1; 2653 io.uio_offset = (off_t)off; 2654 io.uio_resid = fullsiz; 2655 io.uio_rw = UIO_READ; 2656 UIO_SETUP_SYSSPACE(&io); 2657 eofflag = 0; 2658 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2659 2660 error = VOP_READDIR(vp, &io, cred, &eofflag, &cookies, &ncookies); 2661 2662 off = (off_t)io.uio_offset; 2663 if (!cookies && !error) 2664 error = NFSERR_PERM; 2665 if (v3) { 2666 getret = VOP_GETATTR(vp, &at, cred, lwp); 2667 if (!error) 2668 error = getret; 2669 } 2670 2671 VOP_UNLOCK(vp, 0); 2672 if (error) { 2673 vrele(vp); 2674 free((caddr_t)rbuf, M_TEMP); 2675 if (cookies) 2676 free((caddr_t)cookies, M_TEMP); 2677 nfsm_reply(NFSX_POSTOPATTR(v3)); 2678 nfsm_srvpostop_attr(getret, &at); 2679 return (0); 2680 } 2681 if (io.uio_resid) { 2682 siz -= io.uio_resid; 2683 2684 /* 2685 * If nothing read, return eof 2686 * rpc reply 2687 */ 2688 if (siz == 0) { 2689 vrele(vp); 2690 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_COOKIEVERF(v3) + 2691 2 * NFSX_UNSIGNED); 2692 if (v3) { 2693 nfsm_srvpostop_attr(getret, &at); 2694 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 2695 txdr_hyper(at.va_filerev, tl); 2696 tl += 2; 2697 } else 2698 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2699 *tl++ = nfs_false; 2700 *tl = nfs_true; 2701 free((caddr_t)rbuf, M_TEMP); 2702 free((caddr_t)cookies, M_TEMP); 2703 return (0); 2704 } 2705 } 2706 2707 /* 2708 * Check for degenerate cases of nothing useful read. 2709 * If so go try again 2710 */ 2711 cpos = rbuf; 2712 cend = rbuf + siz; 2713 dp = (struct dirent *)cpos; 2714 cookiep = cookies; 2715 2716 while (cpos < cend && ncookies > 0 && 2717 (dp->d_fileno == 0 || dp->d_type == DT_WHT)) { 2718 cpos += dp->d_reclen; 2719 dp = (struct dirent *)cpos; 2720 cookiep++; 2721 ncookies--; 2722 } 2723 if (cpos >= cend || ncookies == 0) { 2724 toff = off; 2725 siz = fullsiz; 2726 free(cookies, M_TEMP); 2727 goto again; 2728 } 2729 2730 len = 3 * NFSX_UNSIGNED; /* paranoia, probably can be 0 */ 2731 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_COOKIEVERF(v3) + siz); 2732 if (v3) { 2733 nfsm_srvpostop_attr(getret, &at); 2734 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2735 txdr_hyper(at.va_filerev, tl); 2736 } 2737 mp = mp2 = mb; 2738 bp = bpos; 2739 be = bp + M_TRAILINGSPACE(mp); 2740 2741 /* Loop through the records and build reply */ 2742 while (cpos < cend && ncookies > 0) { 2743 if (dp->d_fileno != 0 && dp->d_type != DT_WHT) { 2744 nlen = dp->d_namlen; 2745 rem = nfsm_rndup(nlen)-nlen; 2746 len += (4 * NFSX_UNSIGNED + nlen + rem); 2747 if (v3) 2748 len += 2 * NFSX_UNSIGNED; 2749 if (len > cnt) { 2750 eofflag = 0; 2751 break; 2752 } 2753 /* 2754 * Build the directory record xdr from 2755 * the dirent entry. 2756 */ 2757 nfsm_clget; 2758 *tl = nfs_true; 2759 bp += NFSX_UNSIGNED; 2760 if (v3) { 2761 nfsm_clget; 2762 *tl = txdr_unsigned(dp->d_fileno >> 32); 2763 bp += NFSX_UNSIGNED; 2764 } 2765 nfsm_clget; 2766 *tl = txdr_unsigned(dp->d_fileno); 2767 bp += NFSX_UNSIGNED; 2768 nfsm_clget; 2769 *tl = txdr_unsigned(nlen); 2770 bp += NFSX_UNSIGNED; 2771 2772 /* And loop around copying the name */ 2773 xfer = nlen; 2774 cp = dp->d_name; 2775 while (xfer > 0) { 2776 nfsm_clget; 2777 if ((bp+xfer) > be) 2778 tsiz = be-bp; 2779 else 2780 tsiz = xfer; 2781 memcpy(bp, cp, tsiz); 2782 bp += tsiz; 2783 xfer -= tsiz; 2784 if (xfer > 0) 2785 cp += tsiz; 2786 } 2787 /* And null pad to an int32_t boundary */ 2788 for (i = 0; i < rem; i++) 2789 *bp++ = '\0'; 2790 nfsm_clget; 2791 2792 /* Finish off the record */ 2793 txdr_hyper(*cookiep, &jar); 2794 if (v3) { 2795 *tl = jar.nfsuquad[0]; 2796 bp += NFSX_UNSIGNED; 2797 nfsm_clget; 2798 } 2799 *tl = jar.nfsuquad[1]; 2800 bp += NFSX_UNSIGNED; 2801 } 2802 cpos += dp->d_reclen; 2803 dp = (struct dirent *)cpos; 2804 cookiep++; 2805 ncookies--; 2806 } 2807 vrele(vp); 2808 nfsm_clget; 2809 *tl = nfs_false; 2810 bp += NFSX_UNSIGNED; 2811 nfsm_clget; 2812 if (eofflag) 2813 *tl = nfs_true; 2814 else 2815 *tl = nfs_false; 2816 bp += NFSX_UNSIGNED; 2817 if (mp != mb) { 2818 if (bp < be) 2819 mp->m_len = bp - mtod(mp, caddr_t); 2820 } else 2821 mp->m_len += bp - bpos; 2822 free((caddr_t)rbuf, M_TEMP); 2823 free((caddr_t)cookies, M_TEMP); 2824 nfsm_srvdone; 2825 } 2826 2827 int 2828 nfsrv_readdirplus(nfsd, slp, lwp, mrq) 2829 struct nfsrv_descript *nfsd; 2830 struct nfssvc_sock *slp; 2831 struct lwp *lwp; 2832 struct mbuf **mrq; 2833 { 2834 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2835 struct mbuf *nam = nfsd->nd_nam; 2836 caddr_t dpos = nfsd->nd_dpos; 2837 kauth_cred_t cred = nfsd->nd_cr; 2838 char *bp, *be; 2839 struct mbuf *mp; 2840 struct dirent *dp; 2841 caddr_t cp; 2842 u_int32_t *tl; 2843 int32_t t1; 2844 caddr_t bpos; 2845 struct mbuf *mb, *mreq, *mp2; 2846 char *cpos, *cend, *cp2, *rbuf; 2847 struct vnode *vp, *nvp; 2848 struct flrep fl; 2849 nfsrvfh_t nsfh; 2850 struct uio io; 2851 struct iovec iv; 2852 struct vattr va, at, *vap = &va; 2853 struct nfs_fattr *fp; 2854 int len, nlen, rem, xfer, tsiz, i, error = 0, getret = 1; 2855 int siz, cnt, fullsiz, eofflag, rdonly, cache = 0, dirlen, ncookies; 2856 u_quad_t frev, off, toff, verf; 2857 off_t *cookies = NULL, *cookiep; 2858 2859 nfsm_srvmtofh(&nsfh); 2860 nfsm_dissect(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 2861 toff = fxdr_hyper(tl); 2862 tl += 2; 2863 verf = fxdr_hyper(tl); 2864 tl += 2; 2865 siz = fxdr_unsigned(int, *tl++); 2866 cnt = fxdr_unsigned(int, *tl); 2867 off = toff; 2868 siz = ((siz + NFS_SRVDIRBLKSIZ - 1) & ~(NFS_SRVDIRBLKSIZ - 1)); 2869 xfer = NFS_SRVMAXDATA(nfsd); 2870 if (siz > xfer) 2871 siz = xfer; 2872 fullsiz = siz; 2873 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 2874 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2875 if (!error && vp->v_type != VDIR) { 2876 error = ENOTDIR; 2877 vput(vp); 2878 } 2879 if (error) { 2880 nfsm_reply(NFSX_UNSIGNED); 2881 nfsm_srvpostop_attr(getret, &at); 2882 return (0); 2883 } 2884 error = getret = VOP_GETATTR(vp, &at, cred, lwp); 2885 #ifdef NFS3_STRICTVERF 2886 /* 2887 * XXX This check is too strict for Solaris 2.5 clients. 2888 */ 2889 if (!error && toff && verf != at.va_filerev) 2890 error = NFSERR_BAD_COOKIE; 2891 #endif 2892 if (!error) { 2893 nqsrv_getl(vp, ND_READ); 2894 error = nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 0); 2895 } 2896 if (error) { 2897 vput(vp); 2898 nfsm_reply(NFSX_V3POSTOPATTR); 2899 nfsm_srvpostop_attr(getret, &at); 2900 return (0); 2901 } 2902 VOP_UNLOCK(vp, 0); 2903 2904 rbuf = malloc(siz, M_TEMP, M_WAITOK); 2905 again: 2906 iv.iov_base = rbuf; 2907 iv.iov_len = fullsiz; 2908 io.uio_iov = &iv; 2909 io.uio_iovcnt = 1; 2910 io.uio_offset = (off_t)off; 2911 io.uio_resid = fullsiz; 2912 io.uio_rw = UIO_READ; 2913 UIO_SETUP_SYSSPACE(&io); 2914 eofflag = 0; 2915 2916 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2917 2918 error = VOP_READDIR(vp, &io, cred, &eofflag, &cookies, &ncookies); 2919 2920 off = (u_quad_t)io.uio_offset; 2921 getret = VOP_GETATTR(vp, &at, cred, lwp); 2922 2923 VOP_UNLOCK(vp, 0); 2924 2925 /* 2926 * If the VGET operation doesn't work for this filesystem, 2927 * we can't support readdirplus. Returning NOTSUPP should 2928 * make clients fall back to plain readdir. 2929 * There's no need to check for VPTOFH as well, we wouldn't 2930 * even be here otherwise. 2931 */ 2932 if (!getret) { 2933 if ((getret = VFS_VGET(vp->v_mount, at.va_fileid, &nvp))) 2934 getret = (getret == EOPNOTSUPP) ? 2935 NFSERR_NOTSUPP : NFSERR_IO; 2936 else 2937 vput(nvp); 2938 } 2939 2940 if (!cookies && !error) 2941 error = NFSERR_PERM; 2942 if (!error) 2943 error = getret; 2944 if (error) { 2945 vrele(vp); 2946 if (cookies) 2947 free((caddr_t)cookies, M_TEMP); 2948 free((caddr_t)rbuf, M_TEMP); 2949 nfsm_reply(NFSX_V3POSTOPATTR); 2950 nfsm_srvpostop_attr(getret, &at); 2951 return (0); 2952 } 2953 if (io.uio_resid) { 2954 siz -= io.uio_resid; 2955 2956 /* 2957 * If nothing read, return eof 2958 * rpc reply 2959 */ 2960 if (siz == 0) { 2961 vrele(vp); 2962 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF + 2963 2 * NFSX_UNSIGNED); 2964 nfsm_srvpostop_attr(getret, &at); 2965 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 2966 txdr_hyper(at.va_filerev, tl); 2967 tl += 2; 2968 *tl++ = nfs_false; 2969 *tl = nfs_true; 2970 free((caddr_t)cookies, M_TEMP); 2971 free((caddr_t)rbuf, M_TEMP); 2972 return (0); 2973 } 2974 } 2975 2976 /* 2977 * Check for degenerate cases of nothing useful read. 2978 * If so go try again 2979 */ 2980 cpos = rbuf; 2981 cend = rbuf + siz; 2982 dp = (struct dirent *)cpos; 2983 cookiep = cookies; 2984 2985 while (cpos < cend && ncookies > 0 && 2986 (dp->d_fileno == 0 || dp->d_type == DT_WHT)) { 2987 cpos += dp->d_reclen; 2988 dp = (struct dirent *)cpos; 2989 cookiep++; 2990 ncookies--; 2991 } 2992 if (cpos >= cend || ncookies == 0) { 2993 toff = off; 2994 siz = fullsiz; 2995 free(cookies, M_TEMP); 2996 goto again; 2997 } 2998 2999 dirlen = len = NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF + 2 * NFSX_UNSIGNED; 3000 nfsm_reply(cnt); 3001 nfsm_srvpostop_attr(getret, &at); 3002 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 3003 txdr_hyper(at.va_filerev, tl); 3004 mp = mp2 = mb; 3005 bp = bpos; 3006 be = bp + M_TRAILINGSPACE(mp); 3007 3008 /* Loop through the records and build reply */ 3009 while (cpos < cend && ncookies > 0) { 3010 if (dp->d_fileno != 0 && dp->d_type != DT_WHT) { 3011 nfsrvfh_t nnsfh; 3012 3013 nlen = dp->d_namlen; 3014 rem = nfsm_rndup(nlen)-nlen; 3015 3016 /* 3017 * For readdir_and_lookup get the vnode using 3018 * the file number. 3019 */ 3020 if (VFS_VGET(vp->v_mount, dp->d_fileno, &nvp)) 3021 goto invalid; 3022 if (nfsrv_composefh(nvp, &nnsfh, TRUE)) { 3023 vput(nvp); 3024 goto invalid; 3025 } 3026 if (VOP_GETATTR(nvp, vap, cred, lwp)) { 3027 vput(nvp); 3028 goto invalid; 3029 } 3030 vput(nvp); 3031 3032 /* 3033 * If either the dircount or maxcount will be 3034 * exceeded, get out now. Both of these lengths 3035 * are calculated conservatively, including all 3036 * XDR overheads. 3037 */ 3038 len += (8 * NFSX_UNSIGNED + nlen + rem + NFSX_V3FH + 3039 NFSX_V3POSTOPATTR); 3040 dirlen += (6 * NFSX_UNSIGNED + nlen + rem); 3041 if (len > cnt || dirlen > fullsiz) { 3042 eofflag = 0; 3043 break; 3044 } 3045 3046 /* 3047 * Build the directory record xdr from 3048 * the dirent entry. 3049 */ 3050 fp = (struct nfs_fattr *)&fl.fl_fattr; 3051 nfsm_srvfillattr(vap, fp); 3052 fl.fl_fhsize = txdr_unsigned(NFSX_V3FH); 3053 fl.fl_fhok = nfs_true; 3054 fl.fl_postopok = nfs_true; 3055 txdr_hyper(*cookiep, fl.fl_off.nfsuquad); 3056 3057 nfsm_clget; 3058 *tl = nfs_true; 3059 bp += NFSX_UNSIGNED; 3060 nfsm_clget; 3061 *tl = txdr_unsigned(dp->d_fileno >> 32); 3062 bp += NFSX_UNSIGNED; 3063 nfsm_clget; 3064 *tl = txdr_unsigned(dp->d_fileno); 3065 bp += NFSX_UNSIGNED; 3066 nfsm_clget; 3067 *tl = txdr_unsigned(nlen); 3068 bp += NFSX_UNSIGNED; 3069 3070 /* And loop around copying the name */ 3071 xfer = nlen; 3072 cp = dp->d_name; 3073 while (xfer > 0) { 3074 nfsm_clget; 3075 if ((bp + xfer) > be) 3076 tsiz = be - bp; 3077 else 3078 tsiz = xfer; 3079 memcpy(bp, cp, tsiz); 3080 bp += tsiz; 3081 xfer -= tsiz; 3082 if (xfer > 0) 3083 cp += tsiz; 3084 } 3085 /* And null pad to an int32_t boundary */ 3086 for (i = 0; i < rem; i++) 3087 *bp++ = '\0'; 3088 3089 /* 3090 * Now copy the flrep structure out. 3091 */ 3092 xfer = sizeof(struct flrep); 3093 cp = (caddr_t)&fl; 3094 while (xfer > 0) { 3095 nfsm_clget; 3096 if ((bp + xfer) > be) 3097 tsiz = be - bp; 3098 else 3099 tsiz = xfer; 3100 memcpy(bp, cp, tsiz); 3101 bp += tsiz; 3102 xfer -= tsiz; 3103 if (xfer > 0) 3104 cp += tsiz; 3105 } 3106 3107 /* 3108 * ... and filehandle. 3109 */ 3110 xfer = NFSRVFH_SIZE(&nnsfh); 3111 cp = NFSRVFH_DATA(&nnsfh); 3112 while (xfer > 0) { 3113 nfsm_clget; 3114 if ((bp + xfer) > be) 3115 tsiz = be - bp; 3116 else 3117 tsiz = xfer; 3118 memcpy(bp, cp, tsiz); 3119 bp += tsiz; 3120 xfer -= tsiz; 3121 if (xfer > 0) 3122 cp += tsiz; 3123 } 3124 } 3125 invalid: 3126 cpos += dp->d_reclen; 3127 dp = (struct dirent *)cpos; 3128 cookiep++; 3129 ncookies--; 3130 } 3131 vrele(vp); 3132 nfsm_clget; 3133 *tl = nfs_false; 3134 bp += NFSX_UNSIGNED; 3135 nfsm_clget; 3136 if (eofflag) 3137 *tl = nfs_true; 3138 else 3139 *tl = nfs_false; 3140 bp += NFSX_UNSIGNED; 3141 if (mp != mb) { 3142 if (bp < be) 3143 mp->m_len = bp - mtod(mp, caddr_t); 3144 } else 3145 mp->m_len += bp - bpos; 3146 free((caddr_t)cookies, M_TEMP); 3147 free((caddr_t)rbuf, M_TEMP); 3148 nfsm_srvdone; 3149 } 3150 3151 /* 3152 * nfs commit service 3153 */ 3154 int 3155 nfsrv_commit(nfsd, slp, lwp, mrq) 3156 struct nfsrv_descript *nfsd; 3157 struct nfssvc_sock *slp; 3158 struct lwp *lwp; 3159 struct mbuf **mrq; 3160 { 3161 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3162 struct mbuf *nam = nfsd->nd_nam; 3163 caddr_t dpos = nfsd->nd_dpos; 3164 kauth_cred_t cred = nfsd->nd_cr; 3165 struct vattr bfor, aft; 3166 struct vnode *vp; 3167 nfsrvfh_t nsfh; 3168 u_int32_t *tl; 3169 int32_t t1; 3170 caddr_t bpos; 3171 int error = 0, rdonly, for_ret = 1, aft_ret = 1, cache = 0; 3172 uint32_t cnt; 3173 char *cp2; 3174 struct mbuf *mb, *mreq; 3175 u_quad_t frev, off, end; 3176 struct mount *mp = NULL; 3177 3178 nfsm_srvmtofh(&nsfh); 3179 if ((mp = vfs_getvfs(&NFSRVFH_FHANDLE(&nsfh)->fh_fsid)) == NULL) 3180 return (ESTALE); 3181 vn_start_write(NULL, &mp, V_WAIT); 3182 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 3183 3184 off = fxdr_hyper(tl); 3185 tl += 2; 3186 cnt = fxdr_unsigned(uint32_t, *tl); 3187 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 3188 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 3189 if (error) { 3190 nfsm_reply(2 * NFSX_UNSIGNED); 3191 nfsm_srvwcc_data(for_ret, &bfor, aft_ret, &aft); 3192 vn_finished_write(mp, 0); 3193 return (0); 3194 } 3195 for_ret = VOP_GETATTR(vp, &bfor, cred, lwp); 3196 end = (cnt > 0) ? off + cnt : vp->v_size; 3197 if (end < off || end > vp->v_size) 3198 end = vp->v_size; 3199 if (off < vp->v_size) 3200 error = VOP_FSYNC(vp, cred, FSYNC_WAIT, off, end, lwp); 3201 /* else error == 0, from nfsrv_fhtovp() */ 3202 aft_ret = VOP_GETATTR(vp, &aft, cred, lwp); 3203 vput(vp); 3204 nfsm_reply(NFSX_V3WCCDATA + NFSX_V3WRITEVERF); 3205 nfsm_srvwcc_data(for_ret, &bfor, aft_ret, &aft); 3206 if (!error) { 3207 nfsm_build(tl, u_int32_t *, NFSX_V3WRITEVERF); 3208 *tl++ = txdr_unsigned(boottime.tv_sec); 3209 *tl = txdr_unsigned(boottime.tv_usec); 3210 } else { 3211 vn_finished_write(mp, 0); 3212 return (0); 3213 } 3214 vn_finished_write(mp, 0); 3215 nfsm_srvdone; 3216 } 3217 3218 /* 3219 * nfs statfs service 3220 */ 3221 int 3222 nfsrv_statfs(nfsd, slp, lwp, mrq) 3223 struct nfsrv_descript *nfsd; 3224 struct nfssvc_sock *slp; 3225 struct lwp *lwp; 3226 struct mbuf **mrq; 3227 { 3228 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3229 struct mbuf *nam = nfsd->nd_nam; 3230 caddr_t dpos = nfsd->nd_dpos; 3231 kauth_cred_t cred = nfsd->nd_cr; 3232 struct statvfs *sf = NULL; 3233 struct nfs_statfs *sfp; 3234 u_int32_t *tl; 3235 int32_t t1; 3236 caddr_t bpos; 3237 int error = 0, rdonly, cache = 0, getret = 1; 3238 int v3 = (nfsd->nd_flag & ND_NFSV3); 3239 char *cp2; 3240 struct mbuf *mb, *mreq; 3241 struct vnode *vp; 3242 struct vattr at; 3243 nfsrvfh_t nsfh; 3244 u_quad_t frev, tval; 3245 3246 nfsm_srvmtofh(&nsfh); 3247 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 3248 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 3249 if (error) { 3250 nfsm_reply(NFSX_UNSIGNED); 3251 nfsm_srvpostop_attr(getret, &at); 3252 return (0); 3253 } 3254 sf = malloc(sizeof(*sf), M_TEMP, M_WAITOK); 3255 error = VFS_STATVFS(vp->v_mount, sf, lwp); 3256 getret = VOP_GETATTR(vp, &at, cred, lwp); 3257 vput(vp); 3258 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_STATFS(v3)); 3259 if (v3) 3260 nfsm_srvpostop_attr(getret, &at); 3261 if (error) { 3262 free(sf, M_TEMP); 3263 return (0); 3264 } 3265 nfsm_build(sfp, struct nfs_statfs *, NFSX_STATFS(v3)); 3266 if (v3) { 3267 tval = (u_quad_t)((quad_t)sf->f_blocks * (quad_t)sf->f_frsize); 3268 txdr_hyper(tval, &sfp->sf_tbytes); 3269 tval = (u_quad_t)((quad_t)sf->f_bfree * (quad_t)sf->f_frsize); 3270 txdr_hyper(tval, &sfp->sf_fbytes); 3271 tval = (u_quad_t)((quad_t)sf->f_bavail * (quad_t)sf->f_frsize); 3272 txdr_hyper(tval, &sfp->sf_abytes); 3273 tval = (u_quad_t)sf->f_files; 3274 txdr_hyper(tval, &sfp->sf_tfiles); 3275 tval = (u_quad_t)sf->f_ffree; 3276 txdr_hyper(tval, &sfp->sf_ffiles); 3277 txdr_hyper(tval, &sfp->sf_afiles); 3278 sfp->sf_invarsec = 0; 3279 } else { 3280 sfp->sf_tsize = txdr_unsigned(NFS_MAXDGRAMDATA); 3281 sfp->sf_bsize = txdr_unsigned(sf->f_frsize); 3282 sfp->sf_blocks = txdr_unsigned(sf->f_blocks); 3283 sfp->sf_bfree = txdr_unsigned(sf->f_bfree); 3284 sfp->sf_bavail = txdr_unsigned(sf->f_bavail); 3285 } 3286 nfsmout: 3287 if (sf) 3288 free(sf, M_TEMP); 3289 return error; 3290 } 3291 3292 /* 3293 * nfs fsinfo service 3294 */ 3295 int 3296 nfsrv_fsinfo(nfsd, slp, lwp, mrq) 3297 struct nfsrv_descript *nfsd; 3298 struct nfssvc_sock *slp; 3299 struct lwp *lwp; 3300 struct mbuf **mrq; 3301 { 3302 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3303 struct mbuf *nam = nfsd->nd_nam; 3304 caddr_t dpos = nfsd->nd_dpos; 3305 kauth_cred_t cred = nfsd->nd_cr; 3306 u_int32_t *tl; 3307 struct nfsv3_fsinfo *sip; 3308 int32_t t1; 3309 caddr_t bpos; 3310 int error = 0, rdonly, cache = 0, getret = 1; 3311 uint32_t maxdata; 3312 char *cp2; 3313 struct mbuf *mb, *mreq; 3314 struct vnode *vp; 3315 struct vattr at; 3316 nfsrvfh_t nsfh; 3317 u_quad_t frev, maxfsize; 3318 struct statvfs *sb; 3319 3320 nfsm_srvmtofh(&nsfh); 3321 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 3322 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 3323 if (error) { 3324 nfsm_reply(NFSX_UNSIGNED); 3325 nfsm_srvpostop_attr(getret, &at); 3326 return (0); 3327 } 3328 3329 /* XXX Try to make a guess on the max file size. */ 3330 sb = malloc(sizeof(*sb), M_TEMP, M_WAITOK); 3331 VFS_STATVFS(vp->v_mount, sb, (struct lwp *)0); 3332 maxfsize = (u_quad_t)0x80000000 * sb->f_frsize - 1; 3333 free(sb, M_TEMP); 3334 3335 getret = VOP_GETATTR(vp, &at, cred, lwp); 3336 vput(vp); 3337 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3FSINFO); 3338 nfsm_srvpostop_attr(getret, &at); 3339 nfsm_build(sip, struct nfsv3_fsinfo *, NFSX_V3FSINFO); 3340 3341 /* 3342 * XXX 3343 * There should be file system VFS OP(s) to get this information. 3344 * For now, assume ufs. 3345 */ 3346 if (slp->ns_so->so_type == SOCK_DGRAM) 3347 maxdata = NFS_MAXDGRAMDATA; 3348 else 3349 maxdata = NFS_MAXDATA; 3350 sip->fs_rtmax = txdr_unsigned(maxdata); 3351 sip->fs_rtpref = txdr_unsigned(maxdata); 3352 sip->fs_rtmult = txdr_unsigned(NFS_FABLKSIZE); 3353 sip->fs_wtmax = txdr_unsigned(maxdata); 3354 sip->fs_wtpref = txdr_unsigned(maxdata); 3355 sip->fs_wtmult = txdr_unsigned(NFS_FABLKSIZE); 3356 sip->fs_dtpref = txdr_unsigned(maxdata); 3357 txdr_hyper(maxfsize, &sip->fs_maxfilesize); 3358 sip->fs_timedelta.nfsv3_sec = 0; 3359 sip->fs_timedelta.nfsv3_nsec = txdr_unsigned(1); 3360 sip->fs_properties = txdr_unsigned(NFSV3FSINFO_LINK | 3361 NFSV3FSINFO_SYMLINK | NFSV3FSINFO_HOMOGENEOUS | 3362 NFSV3FSINFO_CANSETTIME); 3363 nfsm_srvdone; 3364 } 3365 3366 /* 3367 * nfs pathconf service 3368 */ 3369 int 3370 nfsrv_pathconf(nfsd, slp, lwp, mrq) 3371 struct nfsrv_descript *nfsd; 3372 struct nfssvc_sock *slp; 3373 struct lwp *lwp; 3374 struct mbuf **mrq; 3375 { 3376 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3377 struct mbuf *nam = nfsd->nd_nam; 3378 caddr_t dpos = nfsd->nd_dpos; 3379 kauth_cred_t cred = nfsd->nd_cr; 3380 u_int32_t *tl; 3381 struct nfsv3_pathconf *pc; 3382 int32_t t1; 3383 caddr_t bpos; 3384 int error = 0, rdonly, cache = 0, getret = 1; 3385 register_t linkmax, namemax, chownres, notrunc; 3386 char *cp2; 3387 struct mbuf *mb, *mreq; 3388 struct vnode *vp; 3389 struct vattr at; 3390 nfsrvfh_t nsfh; 3391 u_quad_t frev; 3392 3393 nfsm_srvmtofh(&nsfh); 3394 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 3395 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 3396 if (error) { 3397 nfsm_reply(NFSX_UNSIGNED); 3398 nfsm_srvpostop_attr(getret, &at); 3399 return (0); 3400 } 3401 error = VOP_PATHCONF(vp, _PC_LINK_MAX, &linkmax); 3402 if (!error) 3403 error = VOP_PATHCONF(vp, _PC_NAME_MAX, &namemax); 3404 if (!error) 3405 error = VOP_PATHCONF(vp, _PC_CHOWN_RESTRICTED, &chownres); 3406 if (!error) 3407 error = VOP_PATHCONF(vp, _PC_NO_TRUNC, ¬runc); 3408 getret = VOP_GETATTR(vp, &at, cred, lwp); 3409 vput(vp); 3410 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3PATHCONF); 3411 nfsm_srvpostop_attr(getret, &at); 3412 if (error) 3413 return (0); 3414 nfsm_build(pc, struct nfsv3_pathconf *, NFSX_V3PATHCONF); 3415 3416 pc->pc_linkmax = txdr_unsigned(linkmax); 3417 pc->pc_namemax = txdr_unsigned(namemax); 3418 pc->pc_notrunc = txdr_unsigned(notrunc); 3419 pc->pc_chownrestricted = txdr_unsigned(chownres); 3420 3421 /* 3422 * These should probably be supported by VOP_PATHCONF(), but 3423 * until msdosfs is exportable (why would you want to?), the 3424 * Unix defaults should be ok. 3425 */ 3426 pc->pc_caseinsensitive = nfs_false; 3427 pc->pc_casepreserving = nfs_true; 3428 nfsm_srvdone; 3429 } 3430 3431 /* 3432 * Null operation, used by clients to ping server 3433 */ 3434 /* ARGSUSED */ 3435 int 3436 nfsrv_null(nfsd, slp, lwp, mrq) 3437 struct nfsrv_descript *nfsd; 3438 struct nfssvc_sock *slp; 3439 struct lwp *lwp; 3440 struct mbuf **mrq; 3441 { 3442 struct mbuf *mrep = nfsd->nd_mrep; 3443 caddr_t bpos; 3444 int error = NFSERR_RETVOID, cache = 0; 3445 struct mbuf *mb, *mreq; 3446 u_quad_t frev; 3447 3448 nfsm_reply(0); 3449 return (0); 3450 } 3451 3452 /* 3453 * No operation, used for obsolete procedures 3454 */ 3455 /* ARGSUSED */ 3456 int 3457 nfsrv_noop(nfsd, slp, lwp, mrq) 3458 struct nfsrv_descript *nfsd; 3459 struct nfssvc_sock *slp; 3460 struct lwp *lwp; 3461 struct mbuf **mrq; 3462 { 3463 struct mbuf *mrep = nfsd->nd_mrep; 3464 caddr_t bpos; 3465 int error, cache = 0; 3466 struct mbuf *mb, *mreq; 3467 u_quad_t frev; 3468 3469 if (nfsd->nd_repstat) 3470 error = nfsd->nd_repstat; 3471 else 3472 error = EPROCUNAVAIL; 3473 nfsm_reply(0); 3474 return (0); 3475 } 3476 3477 /* 3478 * Perform access checking for vnodes obtained from file handles that would 3479 * refer to files already opened by a Unix client. You cannot just use 3480 * vn_writechk() and VOP_ACCESS() for two reasons. 3481 * 1 - You must check for exported rdonly as well as MNT_RDONLY for the write case 3482 * 2 - The owner is to be given access irrespective of mode bits for some 3483 * operations, so that processes that chmod after opening a file don't 3484 * break. I don't like this because it opens a security hole, but since 3485 * the nfs server opens a security hole the size of a barn door anyhow, 3486 * what the heck. 3487 * 3488 * The exception to rule 2 is EPERM. If a file is IMMUTABLE, VOP_ACCESS() 3489 * will return EPERM instead of EACCESS. EPERM is always an error. 3490 */ 3491 int 3492 nfsrv_access(vp, flags, cred, rdonly, lwp, override) 3493 struct vnode *vp; 3494 int flags; 3495 kauth_cred_t cred; 3496 int rdonly; 3497 struct lwp *lwp; 3498 int override; 3499 { 3500 struct vattr vattr; 3501 int error; 3502 if (flags & VWRITE) { 3503 /* Just vn_writechk() changed to check rdonly */ 3504 /* 3505 * Disallow write attempts on read-only file systems; 3506 * unless the file is a socket or a block or character 3507 * device resident on the file system. 3508 */ 3509 if (rdonly || (vp->v_mount->mnt_flag & MNT_RDONLY)) { 3510 switch (vp->v_type) { 3511 case VREG: 3512 case VDIR: 3513 case VLNK: 3514 return (EROFS); 3515 default: 3516 break; 3517 } 3518 } 3519 3520 /* 3521 * If the vnode is in use as a process's text, 3522 * we can't allow writing. 3523 */ 3524 if (vp->v_flag & VTEXT) 3525 return (ETXTBSY); 3526 } 3527 error = VOP_GETATTR(vp, &vattr, cred, lwp); 3528 if (error) 3529 return (error); 3530 error = VOP_ACCESS(vp, flags, cred, lwp); 3531 /* 3532 * Allow certain operations for the owner (reads and writes 3533 * on files that are already open). 3534 */ 3535 if (override && error == EACCES && kauth_cred_geteuid(cred) == vattr.va_uid) 3536 error = 0; 3537 return error; 3538 } 3539
Indexes created Sun Sep 21 20:09:37 GMT 2025