nfs_serv.c revision 1.122
1 /* $NetBSD: nfs_serv.c,v 1.122 2007/01/04 20:24:08 elad Exp $ */ 2 3 /* 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Rick Macklem at The University of Guelph. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)nfs_serv.c 8.8 (Berkeley) 7/31/95 35 */ 36 37 /* 38 * nfs version 2 and 3 server calls to vnode ops 39 * - these routines generally have 3 phases 40 * 1 - break down and validate rpc request in mbuf list 41 * 2 - do the vnode ops for the request 42 * (surprisingly ?? many are very similar to syscalls in vfs_syscalls.c) 43 * 3 - build the rpc reply in an mbuf list 44 * nb: 45 * - do not mix the phases, since the nfsm_?? macros can return failures 46 * on a bad rpc or similar and do not do any vrele() or vput()'s 47 * 48 * - the nfsm_reply() macro generates an nfs rpc reply with the nfs 49 * error number iff error != 0 whereas 50 * returning an error from the server function implies a fatal error 51 * such as a badly constructed rpc request that should be dropped without 52 * a reply. 53 * For Version 3, nfsm_reply() does not return for the error case, since 54 * most version 3 rpcs return more than the status for error cases. 55 */ 56 57 #include <sys/cdefs.h> 58 __KERNEL_RCSID(0, "$NetBSD: nfs_serv.c,v 1.122 2007/01/04 20:24:08 elad Exp $"); 59 60 #include <sys/param.h> 61 #include <sys/systm.h> 62 #include <sys/proc.h> 63 #include <sys/file.h> 64 #include <sys/namei.h> 65 #include <sys/vnode.h> 66 #include <sys/mount.h> 67 #include <sys/socket.h> 68 #include <sys/socketvar.h> 69 #include <sys/mbuf.h> 70 #include <sys/dirent.h> 71 #include <sys/stat.h> 72 #include <sys/kernel.h> 73 #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/nfs_var.h> 84 85 /* Global vars */ 86 extern u_int32_t nfs_xdrneg1; 87 extern u_int32_t nfs_false, nfs_true; 88 extern enum vtype nv3tov_type[8]; 89 extern struct nfsstats nfsstats; 90 extern const nfstype nfsv2_type[9]; 91 extern const nfstype nfsv3_type[9]; 92 int nfsrvw_procrastinate = NFS_GATHERDELAY * 1000; 93 int nfsd_use_loan = 1; /* use page-loan for READ OP */ 94 95 #define nqsrv_getl(vp, rw) /* nothing */ 96 97 /* 98 * nfs v3 access service 99 */ 100 int 101 nfsrv3_access(nfsd, slp, lwp, mrq) 102 struct nfsrv_descript *nfsd; 103 struct nfssvc_sock *slp; 104 struct lwp *lwp; 105 struct mbuf **mrq; 106 { 107 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 108 struct mbuf *nam = nfsd->nd_nam; 109 caddr_t dpos = nfsd->nd_dpos; 110 kauth_cred_t cred = nfsd->nd_cr; 111 struct vnode *vp; 112 nfsrvfh_t nsfh; 113 u_int32_t *tl; 114 int32_t t1; 115 caddr_t bpos; 116 int error = 0, rdonly, cache = 0, getret; 117 char *cp2; 118 struct mbuf *mb, *mreq; 119 struct vattr va; 120 u_long inmode, testmode, outmode; 121 u_quad_t frev; 122 123 nfsm_srvmtofh(&nsfh); 124 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 125 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, &rdonly, 126 (nfsd->nd_flag & ND_KERBAUTH), FALSE); 127 if (error) { 128 nfsm_reply(NFSX_UNSIGNED); 129 nfsm_srvpostop_attr(1, (struct vattr *)0); 130 return (0); 131 } 132 inmode = fxdr_unsigned(u_int32_t, *tl); 133 outmode = 0; 134 if ((inmode & NFSV3ACCESS_READ) && 135 nfsrv_access(vp, VREAD, cred, rdonly, lwp, 0) == 0) 136 outmode |= NFSV3ACCESS_READ; 137 if (vp->v_type != VDIR) { 138 testmode = inmode & (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND); 139 if (testmode && 140 nfsrv_access(vp, VWRITE, cred, rdonly, lwp, 0) == 0) 141 outmode |= testmode; 142 if ((inmode & NFSV3ACCESS_EXECUTE) && 143 nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 0) == 0) 144 outmode |= NFSV3ACCESS_EXECUTE; 145 } else { 146 testmode = inmode & (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | 147 NFSV3ACCESS_DELETE); 148 if (testmode && 149 nfsrv_access(vp, VWRITE, cred, rdonly, lwp, 0) == 0) 150 outmode |= testmode; 151 if ((inmode & NFSV3ACCESS_LOOKUP) && 152 nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 0) == 0) 153 outmode |= NFSV3ACCESS_LOOKUP; 154 } 155 getret = VOP_GETATTR(vp, &va, cred, lwp); 156 vput(vp); 157 nfsm_reply(NFSX_POSTOPATTR(1) + NFSX_UNSIGNED); 158 nfsm_srvpostop_attr(getret, &va); 159 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 160 *tl = txdr_unsigned(outmode); 161 nfsm_srvdone; 162 } 163 164 /* 165 * nfs getattr service 166 */ 167 int 168 nfsrv_getattr(nfsd, slp, lwp, mrq) 169 struct nfsrv_descript *nfsd; 170 struct nfssvc_sock *slp; 171 struct lwp *lwp; 172 struct mbuf **mrq; 173 { 174 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 175 struct mbuf *nam = nfsd->nd_nam; 176 caddr_t dpos = nfsd->nd_dpos; 177 kauth_cred_t cred = nfsd->nd_cr; 178 struct nfs_fattr *fp; 179 struct vattr va; 180 struct vnode *vp; 181 nfsrvfh_t nsfh; 182 u_int32_t *tl; 183 int32_t t1; 184 caddr_t bpos; 185 int error = 0, rdonly, cache = 0; 186 char *cp2; 187 struct mbuf *mb, *mreq; 188 u_quad_t frev; 189 190 nfsm_srvmtofh(&nsfh); 191 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, &rdonly, 192 (nfsd->nd_flag & ND_KERBAUTH), FALSE); 193 if (error) { 194 nfsm_reply(0); 195 return (0); 196 } 197 nqsrv_getl(vp, ND_READ); 198 error = VOP_GETATTR(vp, &va, cred, lwp); 199 vput(vp); 200 nfsm_reply(NFSX_FATTR(nfsd->nd_flag & ND_NFSV3)); 201 if (error) 202 return (0); 203 nfsm_build(fp, struct nfs_fattr *, NFSX_FATTR(nfsd->nd_flag & ND_NFSV3)); 204 nfsm_srvfillattr(&va, fp); 205 nfsm_srvdone; 206 } 207 208 /* 209 * nfs setattr service 210 */ 211 int 212 nfsrv_setattr(nfsd, slp, lwp, mrq) 213 struct nfsrv_descript *nfsd; 214 struct nfssvc_sock *slp; 215 struct lwp *lwp; 216 struct mbuf **mrq; 217 { 218 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 219 struct mbuf *nam = nfsd->nd_nam; 220 caddr_t dpos = nfsd->nd_dpos; 221 kauth_cred_t cred = nfsd->nd_cr; 222 struct vattr va, preat; 223 struct nfsv2_sattr *sp; 224 struct nfs_fattr *fp; 225 struct vnode *vp; 226 nfsrvfh_t nsfh; 227 u_int32_t *tl; 228 int32_t t1; 229 caddr_t bpos; 230 int error = 0, rdonly, cache = 0, preat_ret = 1, postat_ret = 1; 231 int v3 = (nfsd->nd_flag & ND_NFSV3), gcheck = 0; 232 char *cp2; 233 struct mbuf *mb, *mreq; 234 u_quad_t frev; 235 struct timespec guard; 236 struct mount *mp = NULL; 237 238 memset(&guard, 0, sizeof guard); /* XXX gcc */ 239 240 nfsm_srvmtofh(&nsfh); 241 if ((mp = vfs_getvfs(&NFSRVFH_FHANDLE(&nsfh)->fh_fsid)) == NULL) 242 return (ESTALE); 243 vn_start_write(NULL, &mp, V_WAIT); 244 VATTR_NULL(&va); 245 if (v3) { 246 nfsm_srvsattr(&va); 247 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 248 gcheck = fxdr_unsigned(int, *tl); 249 if (gcheck) { 250 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 251 fxdr_nfsv3time(tl, &guard); 252 } 253 } else { 254 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 255 /* 256 * Nah nah nah nah na nah 257 * There is a bug in the Sun client that puts 0xffff in the mode 258 * field of sattr when it should put in 0xffffffff. The u_short 259 * doesn't sign extend. 260 * --> check the low order 2 bytes for 0xffff 261 */ 262 if ((fxdr_unsigned(int, sp->sa_mode) & 0xffff) != 0xffff) 263 va.va_mode = nfstov_mode(sp->sa_mode); 264 if (sp->sa_uid != nfs_xdrneg1) 265 va.va_uid = fxdr_unsigned(uid_t, sp->sa_uid); 266 if (sp->sa_gid != nfs_xdrneg1) 267 va.va_gid = fxdr_unsigned(gid_t, sp->sa_gid); 268 if (sp->sa_size != nfs_xdrneg1) 269 va.va_size = fxdr_unsigned(u_quad_t, sp->sa_size); 270 if (sp->sa_atime.nfsv2_sec != nfs_xdrneg1) { 271 #ifdef notyet 272 fxdr_nfsv2time(&sp->sa_atime, &va.va_atime); 273 #else 274 va.va_atime.tv_sec = 275 fxdr_unsigned(u_int32_t,sp->sa_atime.nfsv2_sec); 276 va.va_atime.tv_nsec = 0; 277 #endif 278 } 279 if (sp->sa_mtime.nfsv2_sec != nfs_xdrneg1) 280 fxdr_nfsv2time(&sp->sa_mtime, &va.va_mtime); 281 282 } 283 284 /* 285 * Now that we have all the fields, lets do it. 286 */ 287 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, &rdonly, 288 (nfsd->nd_flag & ND_KERBAUTH), FALSE); 289 if (error) { 290 nfsm_reply(2 * NFSX_UNSIGNED); 291 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 292 vn_finished_write(mp, 0); 293 return (0); 294 } 295 nqsrv_getl(vp, ND_WRITE); 296 if (v3) { 297 error = preat_ret = VOP_GETATTR(vp, &preat, cred, lwp); 298 if (!error && gcheck && 299 (preat.va_ctime.tv_sec != guard.tv_sec || 300 preat.va_ctime.tv_nsec != guard.tv_nsec)) 301 error = NFSERR_NOT_SYNC; 302 if (error) { 303 vput(vp); 304 nfsm_reply(NFSX_WCCDATA(v3)); 305 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 306 vn_finished_write(mp, 0); 307 return (0); 308 } 309 } 310 311 /* 312 * If the size is being changed write acces is required, otherwise 313 * just check for a read only file system. 314 */ 315 if (va.va_size == ((u_quad_t)((quad_t) -1))) { 316 if (rdonly || (vp->v_mount->mnt_flag & MNT_RDONLY)) { 317 error = EROFS; 318 goto out; 319 } 320 } else { 321 if (vp->v_type == VDIR) { 322 error = EISDIR; 323 goto out; 324 } else if ((error = nfsrv_access(vp, VWRITE, cred, rdonly, 325 lwp, 0)) != 0) 326 goto out; 327 } 328 error = VOP_SETATTR(vp, &va, cred, lwp); 329 postat_ret = VOP_GETATTR(vp, &va, cred, lwp); 330 if (!error) 331 error = postat_ret; 332 out: 333 vput(vp); 334 vn_finished_write(mp, 0); 335 nfsm_reply(NFSX_WCCORFATTR(v3)); 336 if (v3) { 337 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 338 return (0); 339 } else { 340 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 341 nfsm_srvfillattr(&va, fp); 342 } 343 nfsm_srvdone; 344 } 345 346 /* 347 * nfs lookup rpc 348 */ 349 int 350 nfsrv_lookup(nfsd, slp, lwp, mrq) 351 struct nfsrv_descript *nfsd; 352 struct nfssvc_sock *slp; 353 struct lwp *lwp; 354 struct mbuf **mrq; 355 { 356 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 357 struct mbuf *nam = nfsd->nd_nam; 358 caddr_t dpos = nfsd->nd_dpos; 359 kauth_cred_t cred = nfsd->nd_cr; 360 struct nfs_fattr *fp; 361 struct nameidata nd, ind, *ndp = &nd; 362 struct vnode *vp, *dirp; 363 nfsrvfh_t nsfh; 364 caddr_t cp; 365 u_int32_t *tl; 366 int32_t t1; 367 caddr_t bpos; 368 int error = 0, cache = 0, dirattr_ret = 1; 369 uint32_t len; 370 int v3 = (nfsd->nd_flag & ND_NFSV3), pubflag; 371 char *cp2; 372 struct mbuf *mb, *mreq; 373 struct vattr va, dirattr; 374 u_quad_t frev; 375 376 nfsm_srvmtofh(&nsfh); 377 nfsm_srvnamesiz(len); 378 379 pubflag = nfs_ispublicfh(&nsfh); 380 381 nd.ni_cnd.cn_cred = cred; 382 nd.ni_cnd.cn_nameiop = LOOKUP; 383 nd.ni_cnd.cn_flags = LOCKLEAF | SAVESTART; 384 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 385 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), pubflag); 386 387 if (!error && pubflag) { 388 if (nd.ni_vp->v_type == VDIR && nfs_pub.np_index != NULL) { 389 /* 390 * Setup call to lookup() to see if we can find 391 * the index file. Arguably, this doesn't belong 392 * in a kernel.. Ugh. 393 */ 394 ind = nd; 395 VOP_UNLOCK(nd.ni_vp, 0); 396 ind.ni_pathlen = strlen(nfs_pub.np_index); 397 ind.ni_cnd.cn_nameptr = ind.ni_cnd.cn_pnbuf = 398 nfs_pub.np_index; 399 ind.ni_startdir = nd.ni_vp; 400 VREF(ind.ni_startdir); 401 error = lookup(&ind); 402 if (!error) { 403 /* 404 * Found an index file. Get rid of 405 * the old references. 406 */ 407 if (dirp) 408 vrele(dirp); 409 dirp = nd.ni_vp; 410 vrele(nd.ni_startdir); 411 ndp = &ind; 412 } else 413 error = 0; 414 } 415 /* 416 * If the public filehandle was used, check that this lookup 417 * didn't result in a filehandle outside the publicly exported 418 * filesystem. 419 */ 420 421 if (!error && ndp->ni_vp->v_mount != nfs_pub.np_mount) { 422 vput(nd.ni_vp); 423 error = EPERM; 424 } 425 } 426 427 if (dirp) { 428 if (v3) 429 dirattr_ret = VOP_GETATTR(dirp, &dirattr, cred, lwp); 430 vrele(dirp); 431 } 432 433 if (error) { 434 nfsm_reply(NFSX_POSTOPATTR(v3)); 435 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 436 return (0); 437 } 438 439 nqsrv_getl(ndp->ni_startdir, ND_READ); 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 vrele(ndp->ni_startdir); 447 nfsm_reply(NFSX_SRVFH(&nsfh, v3) + NFSX_POSTOPORFATTR(v3) + 448 NFSX_POSTOPATTR(v3)); 449 if (error) { 450 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 451 return (0); 452 } 453 nfsm_srvfhtom(&nsfh, v3); 454 if (v3) { 455 nfsm_srvpostop_attr(0, &va); 456 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 457 } else { 458 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 459 nfsm_srvfillattr(&va, fp); 460 } 461 nfsm_srvdone; 462 } 463 464 /* 465 * nfs readlink service 466 */ 467 int 468 nfsrv_readlink(nfsd, slp, lwp, mrq) 469 struct nfsrv_descript *nfsd; 470 struct nfssvc_sock *slp; 471 struct lwp *lwp; 472 struct mbuf **mrq; 473 { 474 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 475 struct mbuf *nam = nfsd->nd_nam; 476 caddr_t dpos = nfsd->nd_dpos; 477 kauth_cred_t cred = nfsd->nd_cr; 478 struct iovec iv[(NFS_MAXPATHLEN+MLEN-1)/MLEN]; 479 struct iovec *ivp = iv; 480 struct mbuf *mp; 481 u_int32_t *tl; 482 int32_t t1; 483 caddr_t bpos; 484 int error = 0, rdonly, cache = 0, i, padlen, getret; 485 uint32_t len; 486 int v3 = (nfsd->nd_flag & ND_NFSV3); 487 char *cp2; 488 struct mbuf *mb, *mp2 = NULL, *mp3 = NULL, *mreq; 489 struct vnode *vp; 490 struct vattr attr; 491 nfsrvfh_t nsfh; 492 struct uio io, *uiop = &io; 493 u_quad_t frev; 494 495 nfsm_srvmtofh(&nsfh); 496 len = 0; 497 i = 0; 498 while (len < NFS_MAXPATHLEN) { 499 mp = m_get(M_WAIT, MT_DATA); 500 MCLAIM(mp, &nfs_mowner); 501 m_clget(mp, M_WAIT); 502 mp->m_len = NFSMSIZ(mp); 503 if (len == 0) 504 mp3 = mp2 = mp; 505 else { 506 mp2->m_next = mp; 507 mp2 = mp; 508 } 509 if ((len+mp->m_len) > NFS_MAXPATHLEN) { 510 mp->m_len = NFS_MAXPATHLEN-len; 511 len = NFS_MAXPATHLEN; 512 } else 513 len += mp->m_len; 514 ivp->iov_base = mtod(mp, caddr_t); 515 ivp->iov_len = mp->m_len; 516 i++; 517 ivp++; 518 } 519 uiop->uio_iov = iv; 520 uiop->uio_iovcnt = i; 521 uiop->uio_offset = 0; 522 uiop->uio_resid = len; 523 uiop->uio_rw = UIO_READ; 524 UIO_SETUP_SYSSPACE(uiop); 525 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 526 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 527 if (error) { 528 m_freem(mp3); 529 nfsm_reply(2 * NFSX_UNSIGNED); 530 nfsm_srvpostop_attr(1, (struct vattr *)0); 531 return (0); 532 } 533 if (vp->v_type != VLNK) { 534 if (v3) 535 error = EINVAL; 536 else 537 error = ENXIO; 538 goto out; 539 } 540 nqsrv_getl(vp, ND_READ); 541 error = VOP_READLINK(vp, uiop, cred); 542 out: 543 getret = VOP_GETATTR(vp, &attr, cred, lwp); 544 vput(vp); 545 if (error) 546 m_freem(mp3); 547 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_UNSIGNED); 548 if (v3) { 549 nfsm_srvpostop_attr(getret, &attr); 550 if (error) 551 return (0); 552 } 553 len -= uiop->uio_resid; 554 padlen = nfsm_padlen(len); 555 if (uiop->uio_resid || padlen) 556 nfs_zeropad(mp3, uiop->uio_resid, padlen); 557 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 558 *tl = txdr_unsigned(len); 559 mb->m_next = mp3; 560 nfsm_srvdone; 561 } 562 563 /* 564 * nfs read service 565 */ 566 int 567 nfsrv_read(nfsd, slp, lwp, mrq) 568 struct nfsrv_descript *nfsd; 569 struct nfssvc_sock *slp; 570 struct lwp *lwp; 571 struct mbuf **mrq; 572 { 573 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 574 struct mbuf *nam = nfsd->nd_nam; 575 caddr_t dpos = nfsd->nd_dpos; 576 kauth_cred_t cred = nfsd->nd_cr; 577 struct mbuf *m; 578 struct nfs_fattr *fp; 579 u_int32_t *tl; 580 int32_t t1; 581 int i; 582 caddr_t bpos; 583 int error = 0, rdonly, cache = 0, getret; 584 int v3 = (nfsd->nd_flag & ND_NFSV3); 585 uint32_t reqlen, len, cnt, left; 586 int padlen; 587 char *cp2; 588 struct mbuf *mb, *mreq; 589 struct vnode *vp; 590 nfsrvfh_t nsfh; 591 struct uio io, *uiop = &io; 592 struct vattr va; 593 off_t off; 594 u_quad_t frev; 595 596 nfsm_srvmtofh(&nsfh); 597 if (v3) { 598 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 599 off = fxdr_hyper(tl); 600 } else { 601 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 602 off = (off_t)fxdr_unsigned(u_int32_t, *tl); 603 } 604 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 605 reqlen = fxdr_unsigned(uint32_t, *tl); 606 reqlen = MIN(reqlen, NFS_SRVMAXDATA(nfsd)); 607 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 608 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 609 if (error) { 610 nfsm_reply(2 * NFSX_UNSIGNED); 611 nfsm_srvpostop_attr(1, (struct vattr *)0); 612 return (0); 613 } 614 if (vp->v_type != VREG) { 615 if (v3) 616 error = EINVAL; 617 else 618 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 619 } 620 if (!error) { 621 nqsrv_getl(vp, ND_READ); 622 if ((error = nfsrv_access(vp, VREAD, cred, rdonly, lwp, 1)) != 0) 623 error = nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 1); 624 } 625 getret = VOP_GETATTR(vp, &va, cred, lwp); 626 if (!error) 627 error = getret; 628 if (error) { 629 vput(vp); 630 nfsm_reply(NFSX_POSTOPATTR(v3)); 631 nfsm_srvpostop_attr(getret, &va); 632 return (0); 633 } 634 if (off >= va.va_size) 635 cnt = 0; 636 else if ((off + reqlen) > va.va_size) 637 cnt = va.va_size - off; 638 else 639 cnt = reqlen; 640 nfsm_reply(NFSX_POSTOPORFATTR(v3) + 3 * NFSX_UNSIGNED+nfsm_rndup(cnt)); 641 if (v3) { 642 nfsm_build(tl, u_int32_t *, NFSX_V3FATTR + 4 * NFSX_UNSIGNED); 643 *tl++ = nfs_true; 644 fp = (struct nfs_fattr *)tl; 645 tl += (NFSX_V3FATTR / sizeof (u_int32_t)); 646 } else { 647 nfsm_build(tl, u_int32_t *, NFSX_V2FATTR + NFSX_UNSIGNED); 648 fp = (struct nfs_fattr *)tl; 649 tl += (NFSX_V2FATTR / sizeof (u_int32_t)); 650 } 651 len = left = cnt; 652 if (cnt > 0) { 653 if (nfsd_use_loan) { 654 struct vm_page **pgpp; 655 voff_t pgoff = trunc_page(off); 656 int npages; 657 vaddr_t lva; 658 659 npages = (round_page(off + cnt) - pgoff) >> PAGE_SHIFT; 660 KASSERT(npages <= M_EXT_MAXPAGES); /* XXX */ 661 662 /* allocate kva for mbuf data */ 663 lva = sokvaalloc(npages << PAGE_SHIFT, slp->ns_so); 664 if (lva == 0) { 665 /* fall back to VOP_READ */ 666 goto loan_fail; 667 } 668 669 /* allocate mbuf */ 670 m = m_get(M_WAIT, MT_DATA); 671 MCLAIM(m, &nfs_mowner); 672 pgpp = m->m_ext.ext_pgs; 673 674 /* loan pages */ 675 error = uvm_loanuobjpages(&vp->v_uobj, pgoff, npages, 676 pgpp); 677 if (error) { 678 sokvafree(lva, npages << PAGE_SHIFT); 679 m_free(m); 680 if (error == EBUSY) 681 goto loan_fail; 682 goto read_error; 683 } 684 685 /* associate kva to mbuf */ 686 MEXTADD(m, (void *)(lva + ((vaddr_t)off & PAGE_MASK)), 687 cnt, M_MBUF, soloanfree, slp->ns_so); 688 m->m_flags |= M_EXT_PAGES | M_EXT_ROMAP; 689 m->m_len = cnt; 690 691 /* map pages */ 692 for (i = 0; i < npages; i++) { 693 pmap_kenter_pa(lva, VM_PAGE_TO_PHYS(pgpp[i]), 694 VM_PROT_READ); 695 lva += PAGE_SIZE; 696 } 697 698 pmap_update(pmap_kernel()); 699 700 mb->m_next = m; 701 mb = m; 702 error = 0; 703 uiop->uio_resid = 0; 704 } else { 705 struct iovec *iv; 706 struct iovec *iv2; 707 struct mbuf *m2; 708 int siz; 709 loan_fail: 710 /* 711 * Generate the mbuf list with the uio_iov ref. to it. 712 */ 713 i = 0; 714 m = m2 = mb; 715 while (left > 0) { 716 siz = min(M_TRAILINGSPACE(m), left); 717 if (siz > 0) { 718 left -= siz; 719 i++; 720 } 721 if (left > 0) { 722 m = m_get(M_WAIT, MT_DATA); 723 MCLAIM(m, &nfs_mowner); 724 m_clget(m, M_WAIT); 725 m->m_len = 0; 726 m2->m_next = m; 727 m2 = m; 728 } 729 } 730 iv = malloc(i * sizeof(struct iovec), M_TEMP, M_WAITOK); 731 uiop->uio_iov = iv2 = iv; 732 m = mb; 733 left = cnt; 734 i = 0; 735 while (left > 0) { 736 if (m == NULL) 737 panic("nfsrv_read iov"); 738 siz = min(M_TRAILINGSPACE(m), left); 739 if (siz > 0) { 740 iv->iov_base = mtod(m, caddr_t) + 741 m->m_len; 742 iv->iov_len = siz; 743 m->m_len += siz; 744 left -= siz; 745 iv++; 746 i++; 747 } 748 m = m->m_next; 749 } 750 uiop->uio_iovcnt = i; 751 uiop->uio_offset = off; 752 uiop->uio_resid = cnt; 753 uiop->uio_rw = UIO_READ; 754 UIO_SETUP_SYSSPACE(uiop); 755 error = VOP_READ(vp, uiop, IO_NODELOCKED, cred); 756 free((caddr_t)iv2, M_TEMP); 757 } 758 read_error: 759 if (error || (getret = VOP_GETATTR(vp, &va, cred, lwp)) != 0){ 760 if (!error) 761 error = getret; 762 m_freem(mreq); 763 vput(vp); 764 nfsm_reply(NFSX_POSTOPATTR(v3)); 765 nfsm_srvpostop_attr(getret, &va); 766 return (0); 767 } 768 } else { 769 uiop->uio_resid = 0; 770 } 771 vput(vp); 772 nfsm_srvfillattr(&va, fp); 773 len -= uiop->uio_resid; 774 padlen = nfsm_padlen(len); 775 if (uiop->uio_resid || padlen) 776 nfs_zeropad(mb, uiop->uio_resid, padlen); 777 if (v3) { 778 /* count */ 779 *tl++ = txdr_unsigned(len); 780 /* eof */ 781 if (off + len >= va.va_size) 782 *tl++ = nfs_true; 783 else 784 *tl++ = nfs_false; 785 } 786 *tl = txdr_unsigned(len); 787 nfsm_srvdone; 788 } 789 790 /* 791 * nfs write service 792 */ 793 int 794 nfsrv_write(nfsd, slp, lwp, mrq) 795 struct nfsrv_descript *nfsd; 796 struct nfssvc_sock *slp; 797 struct lwp *lwp; 798 struct mbuf **mrq; 799 { 800 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 801 struct mbuf *nam = nfsd->nd_nam; 802 caddr_t dpos = nfsd->nd_dpos; 803 kauth_cred_t cred = nfsd->nd_cr; 804 struct iovec *ivp; 805 int i, cnt; 806 struct mbuf *mp; 807 struct nfs_fattr *fp; 808 struct iovec *iv; 809 struct vattr va, forat; 810 u_int32_t *tl; 811 int32_t t1; 812 caddr_t bpos; 813 int error = 0, rdonly, cache = 0, len, forat_ret = 1; 814 int ioflags, aftat_ret = 1, retlen, zeroing, adjust; 815 int stable = NFSV3WRITE_FILESYNC; 816 int v3 = (nfsd->nd_flag & ND_NFSV3); 817 char *cp2; 818 struct mbuf *mb, *mreq; 819 struct vnode *vp; 820 nfsrvfh_t nsfh; 821 struct uio io, *uiop = &io; 822 off_t off; 823 u_quad_t frev; 824 struct mount *mntp = NULL; 825 826 if (mrep == NULL) { 827 *mrq = NULL; 828 return (0); 829 } 830 nfsm_srvmtofh(&nsfh); 831 if ((mntp = vfs_getvfs(&NFSRVFH_FHANDLE(&nsfh)->fh_fsid)) == NULL) 832 return (ESTALE); 833 vn_start_write(NULL, &mntp, V_WAIT); 834 if (v3) { 835 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 836 off = fxdr_hyper(tl); 837 tl += 3; 838 stable = fxdr_unsigned(int, *tl++); 839 } else { 840 nfsm_dissect(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 841 off = (off_t)fxdr_unsigned(u_int32_t, *++tl); 842 tl += 2; 843 } 844 retlen = len = fxdr_unsigned(int32_t, *tl); 845 cnt = i = 0; 846 847 /* 848 * For NFS Version 2, it is not obvious what a write of zero length 849 * should do, but I might as well be consistent with Version 3, 850 * which is to return ok so long as there are no permission problems. 851 */ 852 if (len > 0) { 853 zeroing = 1; 854 mp = mrep; 855 while (mp) { 856 if (mp == md) { 857 zeroing = 0; 858 adjust = dpos - mtod(mp, caddr_t); 859 mp->m_len -= adjust; 860 if (mp->m_len > 0 && adjust > 0) 861 NFSMADV(mp, adjust); 862 } 863 if (zeroing) 864 mp->m_len = 0; 865 else if (mp->m_len > 0) { 866 i += mp->m_len; 867 if (i > len) { 868 mp->m_len -= (i - len); 869 zeroing = 1; 870 } 871 if (mp->m_len > 0) 872 cnt++; 873 } 874 mp = mp->m_next; 875 } 876 } 877 if (len > NFS_MAXDATA || len < 0 || i < len) { 878 error = EIO; 879 nfsm_reply(2 * NFSX_UNSIGNED); 880 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 881 vn_finished_write(mntp, 0); 882 return (0); 883 } 884 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 885 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 886 if (error) { 887 nfsm_reply(2 * NFSX_UNSIGNED); 888 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 889 vn_finished_write(mntp, 0); 890 return (0); 891 } 892 if (v3) 893 forat_ret = VOP_GETATTR(vp, &forat, cred, lwp); 894 if (vp->v_type != VREG) { 895 if (v3) 896 error = EINVAL; 897 else 898 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 899 } 900 if (!error) { 901 nqsrv_getl(vp, ND_WRITE); 902 error = nfsrv_access(vp, VWRITE, cred, rdonly, lwp, 1); 903 } 904 if (error) { 905 vput(vp); 906 nfsm_reply(NFSX_WCCDATA(v3)); 907 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 908 vn_finished_write(mntp, 0); 909 return (0); 910 } 911 912 if (len > 0) { 913 ivp = malloc(cnt * sizeof (struct iovec), M_TEMP, M_WAITOK); 914 uiop->uio_iov = iv = ivp; 915 uiop->uio_iovcnt = cnt; 916 mp = mrep; 917 while (mp) { 918 if (mp->m_len > 0) { 919 ivp->iov_base = mtod(mp, caddr_t); 920 ivp->iov_len = mp->m_len; 921 ivp++; 922 } 923 mp = mp->m_next; 924 } 925 926 /* 927 * XXX 928 * The IO_METASYNC flag indicates that all metadata (and not 929 * just enough to ensure data integrity) must be written to 930 * stable storage synchronously. 931 * (IO_METASYNC is not yet implemented in 4.4BSD-Lite.) 932 */ 933 if (stable == NFSV3WRITE_UNSTABLE) 934 ioflags = IO_NODELOCKED; 935 else if (stable == NFSV3WRITE_DATASYNC) 936 ioflags = (IO_SYNC | IO_NODELOCKED); 937 else 938 ioflags = (IO_METASYNC | IO_SYNC | IO_NODELOCKED); 939 uiop->uio_resid = len; 940 uiop->uio_rw = UIO_WRITE; 941 uiop->uio_offset = off; 942 UIO_SETUP_SYSSPACE(uiop); 943 error = VOP_WRITE(vp, uiop, ioflags, cred); 944 nfsstats.srvvop_writes++; 945 free(iv, M_TEMP); 946 } 947 aftat_ret = VOP_GETATTR(vp, &va, cred, lwp); 948 vput(vp); 949 vn_finished_write(mntp, 0); 950 if (!error) 951 error = aftat_ret; 952 nfsm_reply(NFSX_PREOPATTR(v3) + NFSX_POSTOPORFATTR(v3) + 953 2 * NFSX_UNSIGNED + NFSX_WRITEVERF(v3)); 954 if (v3) { 955 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 956 if (error) 957 return (0); 958 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 959 *tl++ = txdr_unsigned(retlen); 960 if (stable == NFSV3WRITE_UNSTABLE) 961 *tl++ = txdr_unsigned(stable); 962 else 963 *tl++ = txdr_unsigned(NFSV3WRITE_FILESYNC); 964 /* 965 * Actually, there is no need to txdr these fields, 966 * but it may make the values more human readable, 967 * for debugging purposes. 968 */ 969 *tl++ = txdr_unsigned(boottime.tv_sec); 970 *tl = txdr_unsigned(boottime.tv_usec); 971 } else { 972 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 973 nfsm_srvfillattr(&va, fp); 974 } 975 nfsm_srvdone; 976 } 977 978 /* 979 * XXX elad: the original NFSW_SAMECRED() macro also made sure the 980 * two nd_flag fields of the descriptors contained 981 * ND_KERBAUTH. 982 */ 983 static int 984 nfsrv_samecred(kauth_cred_t cred1, kauth_cred_t cred2) 985 { 986 int i, do_ngroups; 987 988 if (kauth_cred_geteuid(cred1) != kauth_cred_geteuid(cred2)) 989 return (0); 990 if (kauth_cred_ngroups(cred1) != kauth_cred_ngroups(cred2)) 991 return (0); 992 do_ngroups = kauth_cred_ngroups(cred1); 993 for (i = 0; i < do_ngroups; i++) 994 if (kauth_cred_group(cred1, i) != 995 kauth_cred_group(cred2, i)) 996 return (0); 997 998 return (1); 999 } 1000 1001 static struct nfsrvw_delayhash * 1002 nfsrv_nwdelayhash(struct nfssvc_sock *slp, const nfsrvfh_t *nsfh) 1003 { 1004 uint32_t hash; 1005 1006 hash = hash32_buf(NFSRVFH_DATA(nsfh), NFSRVFH_SIZE(nsfh), 1007 HASH32_BUF_INIT); 1008 return &slp->ns_wdelayhashtbl[hash % NFS_WDELAYHASHSIZ]; 1009 } 1010 1011 /* 1012 * NFS write service with write gathering support. Called when 1013 * nfsrvw_procrastinate > 0. 1014 * See: Chet Juszczak, "Improving the Write Performance of an NFS Server", 1015 * in Proc. of the Winter 1994 Usenix Conference, pg. 247-259, San Franscisco, 1016 * Jan. 1994. 1017 */ 1018 int 1019 nfsrv_writegather(ndp, slp, lwp, mrq) 1020 struct nfsrv_descript **ndp; 1021 struct nfssvc_sock *slp; 1022 struct lwp *lwp; 1023 struct mbuf **mrq; 1024 { 1025 struct timeval now; 1026 struct iovec *ivp; 1027 struct mbuf *mp; 1028 struct nfsrv_descript *wp, *nfsd, *owp, *swp; 1029 struct nfs_fattr *fp; 1030 int i = 0; 1031 struct iovec *iov; 1032 struct nfsrvw_delayhash *wpp; 1033 kauth_cred_t cred; 1034 struct vattr va, forat; 1035 u_int32_t *tl; 1036 int32_t t1; 1037 caddr_t bpos, dpos; 1038 int error = 0, rdonly, cache = 0, len = 0, forat_ret = 1; 1039 int ioflags, aftat_ret = 1, s, adjust, v3, zeroing; 1040 char *cp2; 1041 struct mbuf *mb, *mreq, *mrep, *md; 1042 struct vnode *vp; 1043 struct uio io, *uiop = &io; 1044 u_quad_t frev, cur_usec; 1045 struct mount *mntp = NULL; 1046 1047 *mrq = NULL; 1048 if (*ndp) { 1049 nfsd = *ndp; 1050 *ndp = NULL; 1051 mrep = nfsd->nd_mrep; 1052 md = nfsd->nd_md; 1053 dpos = nfsd->nd_dpos; 1054 cred = nfsd->nd_cr; 1055 v3 = (nfsd->nd_flag & ND_NFSV3); 1056 LIST_INIT(&nfsd->nd_coalesce); 1057 nfsd->nd_mreq = NULL; 1058 nfsd->nd_stable = NFSV3WRITE_FILESYNC; 1059 getmicrotime(&now); 1060 cur_usec = (u_quad_t)now.tv_sec * 1000000 + (u_quad_t)now.tv_usec; 1061 nfsd->nd_time = cur_usec + nfsrvw_procrastinate; 1062 1063 /* 1064 * Now, get the write header.. 1065 */ 1066 nfsm_srvmtofh(&nfsd->nd_fh); 1067 if (v3) { 1068 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 1069 nfsd->nd_off = fxdr_hyper(tl); 1070 tl += 3; 1071 nfsd->nd_stable = fxdr_unsigned(int, *tl++); 1072 } else { 1073 nfsm_dissect(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1074 nfsd->nd_off = (off_t)fxdr_unsigned(u_int32_t, *++tl); 1075 tl += 2; 1076 } 1077 len = fxdr_unsigned(int32_t, *tl); 1078 nfsd->nd_len = len; 1079 nfsd->nd_eoff = nfsd->nd_off + len; 1080 1081 /* 1082 * Trim the header out of the mbuf list and trim off any trailing 1083 * junk so that the mbuf list has only the write data. 1084 */ 1085 zeroing = 1; 1086 i = 0; 1087 mp = mrep; 1088 while (mp) { 1089 if (mp == md) { 1090 zeroing = 0; 1091 adjust = dpos - mtod(mp, caddr_t); 1092 mp->m_len -= adjust; 1093 if (mp->m_len > 0 && adjust > 0) 1094 NFSMADV(mp, adjust); 1095 } 1096 if (zeroing) 1097 mp->m_len = 0; 1098 else { 1099 i += mp->m_len; 1100 if (i > len) { 1101 mp->m_len -= (i - len); 1102 zeroing = 1; 1103 } 1104 } 1105 mp = mp->m_next; 1106 } 1107 if (len > NFS_MAXDATA || len < 0 || i < len) { 1108 nfsmout: 1109 m_freem(mrep); 1110 error = EIO; 1111 nfsm_writereply(2 * NFSX_UNSIGNED, v3); 1112 if (v3) 1113 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1114 nfsd->nd_mreq = mreq; 1115 nfsd->nd_mrep = NULL; 1116 nfsd->nd_time = 0; 1117 } 1118 1119 /* 1120 * Add this entry to the hash and time queues. 1121 */ 1122 s = splsoftclock(); 1123 owp = NULL; 1124 wp = LIST_FIRST(&slp->ns_tq); 1125 while (wp && wp->nd_time < nfsd->nd_time) { 1126 owp = wp; 1127 wp = LIST_NEXT(wp, nd_tq); 1128 } 1129 if (owp) { 1130 LIST_INSERT_AFTER(owp, nfsd, nd_tq); 1131 } else { 1132 LIST_INSERT_HEAD(&slp->ns_tq, nfsd, nd_tq); 1133 } 1134 if (nfsd->nd_mrep) { 1135 wpp = nfsrv_nwdelayhash(slp, &nfsd->nd_fh); 1136 owp = NULL; 1137 wp = LIST_FIRST(wpp); 1138 while (wp && nfsrv_comparefh(&nfsd->nd_fh, &wp->nd_fh)) { 1139 owp = wp; 1140 wp = LIST_NEXT(wp, nd_hash); 1141 } 1142 while (wp && wp->nd_off < nfsd->nd_off && 1143 !nfsrv_comparefh(&nfsd->nd_fh, &wp->nd_fh)) { 1144 owp = wp; 1145 wp = LIST_NEXT(wp, nd_hash); 1146 } 1147 if (owp) { 1148 LIST_INSERT_AFTER(owp, nfsd, nd_hash); 1149 1150 /* 1151 * Search the hash list for overlapping entries and 1152 * coalesce. 1153 */ 1154 for(; nfsd && NFSW_CONTIG(owp, nfsd); nfsd = wp) { 1155 wp = LIST_NEXT(nfsd, nd_hash); 1156 if (nfsrv_samecred(owp->nd_cr, nfsd->nd_cr)) 1157 nfsrvw_coalesce(owp, nfsd); 1158 } 1159 } else { 1160 LIST_INSERT_HEAD(wpp, nfsd, nd_hash); 1161 } 1162 } 1163 splx(s); 1164 } 1165 1166 /* 1167 * Now, do VOP_WRITE()s for any one(s) that need to be done now 1168 * and generate the associated reply mbuf list(s). 1169 */ 1170 loop1: 1171 getmicrotime(&now); 1172 cur_usec = (u_quad_t)now.tv_sec * 1000000 + (u_quad_t)now.tv_usec; 1173 s = splsoftclock(); 1174 for (nfsd = LIST_FIRST(&slp->ns_tq); nfsd; nfsd = owp) { 1175 owp = LIST_NEXT(nfsd, nd_tq); 1176 if (nfsd->nd_time > cur_usec) 1177 break; 1178 if (nfsd->nd_mreq) 1179 continue; 1180 LIST_REMOVE(nfsd, nd_tq); 1181 LIST_REMOVE(nfsd, nd_hash); 1182 splx(s); 1183 mrep = nfsd->nd_mrep; 1184 nfsd->nd_mrep = NULL; 1185 cred = nfsd->nd_cr; 1186 v3 = (nfsd->nd_flag & ND_NFSV3); 1187 forat_ret = aftat_ret = 1; 1188 error = nfsrv_fhtovp(&nfsd->nd_fh, 1, &vp, cred, slp, 1189 nfsd->nd_nam, &rdonly, (nfsd->nd_flag & ND_KERBAUTH), 1190 FALSE); 1191 if (!error) { 1192 if (v3) 1193 forat_ret = VOP_GETATTR(vp, &forat, cred, lwp); 1194 if (vp->v_type != VREG) { 1195 if (v3) 1196 error = EINVAL; 1197 else 1198 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 1199 } 1200 } else 1201 vp = NULL; 1202 if (!error) { 1203 nqsrv_getl(vp, ND_WRITE); 1204 error = nfsrv_access(vp, VWRITE, cred, rdonly, lwp, 1); 1205 } 1206 1207 if (nfsd->nd_stable == NFSV3WRITE_UNSTABLE) 1208 ioflags = IO_NODELOCKED; 1209 else if (nfsd->nd_stable == NFSV3WRITE_DATASYNC) 1210 ioflags = (IO_SYNC | IO_NODELOCKED); 1211 else 1212 ioflags = (IO_METASYNC | IO_SYNC | IO_NODELOCKED); 1213 uiop->uio_rw = UIO_WRITE; 1214 uiop->uio_offset = nfsd->nd_off; 1215 uiop->uio_resid = nfsd->nd_eoff - nfsd->nd_off; 1216 UIO_SETUP_SYSSPACE(uiop); 1217 if (uiop->uio_resid > 0) { 1218 mp = mrep; 1219 i = 0; 1220 while (mp) { 1221 if (mp->m_len > 0) 1222 i++; 1223 mp = mp->m_next; 1224 } 1225 uiop->uio_iovcnt = i; 1226 iov = malloc(i * sizeof (struct iovec), M_TEMP, M_WAITOK); 1227 uiop->uio_iov = ivp = iov; 1228 mp = mrep; 1229 while (mp) { 1230 if (mp->m_len > 0) { 1231 ivp->iov_base = mtod(mp, caddr_t); 1232 ivp->iov_len = mp->m_len; 1233 ivp++; 1234 } 1235 mp = mp->m_next; 1236 } 1237 if (!error) { 1238 if (vn_start_write(vp, &mntp, V_NOWAIT) != 0) { 1239 VOP_UNLOCK(vp, 0); 1240 vn_start_write(NULL, &mntp, V_WAIT); 1241 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 1242 } 1243 if (!error) { 1244 error = VOP_WRITE(vp, uiop, ioflags, cred); 1245 nfsstats.srvvop_writes++; 1246 vn_finished_write(mntp, 0); 1247 } 1248 } 1249 free((caddr_t)iov, M_TEMP); 1250 } 1251 m_freem(mrep); 1252 if (vp) { 1253 aftat_ret = VOP_GETATTR(vp, &va, cred, lwp); 1254 vput(vp); 1255 } 1256 1257 /* 1258 * Loop around generating replies for all write rpcs that have 1259 * now been completed. 1260 */ 1261 swp = nfsd; 1262 do { 1263 if (error) { 1264 nfsm_writereply(NFSX_WCCDATA(v3), v3); 1265 if (v3) { 1266 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1267 } 1268 } else { 1269 nfsm_writereply(NFSX_PREOPATTR(v3) + 1270 NFSX_POSTOPORFATTR(v3) + 2 * NFSX_UNSIGNED + 1271 NFSX_WRITEVERF(v3), v3); 1272 if (v3) { 1273 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1274 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1275 *tl++ = txdr_unsigned(nfsd->nd_len); 1276 *tl++ = txdr_unsigned(swp->nd_stable); 1277 /* 1278 * Actually, there is no need to txdr these fields, 1279 * but it may make the values more human readable, 1280 * for debugging purposes. 1281 */ 1282 *tl++ = txdr_unsigned(boottime.tv_sec); 1283 *tl = txdr_unsigned(boottime.tv_usec); 1284 } else { 1285 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 1286 nfsm_srvfillattr(&va, fp); 1287 } 1288 } 1289 nfsd->nd_mreq = mreq; 1290 if (nfsd->nd_mrep) 1291 panic("nfsrv_write: nd_mrep not free"); 1292 1293 /* 1294 * Done. Put it at the head of the timer queue so that 1295 * the final phase can return the reply. 1296 */ 1297 s = splsoftclock(); 1298 if (nfsd != swp) { 1299 nfsd->nd_time = 0; 1300 LIST_INSERT_HEAD(&slp->ns_tq, nfsd, nd_tq); 1301 } 1302 nfsd = LIST_FIRST(&swp->nd_coalesce); 1303 if (nfsd) { 1304 LIST_REMOVE(nfsd, nd_tq); 1305 } 1306 splx(s); 1307 } while (nfsd); 1308 s = splsoftclock(); 1309 swp->nd_time = 0; 1310 LIST_INSERT_HEAD(&slp->ns_tq, swp, nd_tq); 1311 splx(s); 1312 goto loop1; 1313 } 1314 splx(s); 1315 1316 /* 1317 * Search for a reply to return. 1318 */ 1319 s = splsoftclock(); 1320 LIST_FOREACH(nfsd, &slp->ns_tq, nd_tq) { 1321 if (nfsd->nd_mreq) { 1322 LIST_REMOVE(nfsd, nd_tq); 1323 *mrq = nfsd->nd_mreq; 1324 *ndp = nfsd; 1325 break; 1326 } 1327 } 1328 splx(s); 1329 return (0); 1330 } 1331 1332 /* 1333 * Coalesce the write request nfsd into owp. To do this we must: 1334 * - remove nfsd from the queues 1335 * - merge nfsd->nd_mrep into owp->nd_mrep 1336 * - update the nd_eoff and nd_stable for owp 1337 * - put nfsd on owp's nd_coalesce list 1338 * NB: Must be called at splsoftclock(). 1339 */ 1340 void 1341 nfsrvw_coalesce(owp, nfsd) 1342 struct nfsrv_descript *owp; 1343 struct nfsrv_descript *nfsd; 1344 { 1345 int overlap; 1346 struct mbuf *mp; 1347 struct nfsrv_descript *m; 1348 1349 LIST_REMOVE(nfsd, nd_hash); 1350 LIST_REMOVE(nfsd, nd_tq); 1351 if (owp->nd_eoff < nfsd->nd_eoff) { 1352 overlap = owp->nd_eoff - nfsd->nd_off; 1353 if (overlap < 0) 1354 panic("nfsrv_coalesce: bad off"); 1355 if (overlap > 0) 1356 m_adj(nfsd->nd_mrep, overlap); 1357 mp = owp->nd_mrep; 1358 while (mp->m_next) 1359 mp = mp->m_next; 1360 mp->m_next = nfsd->nd_mrep; 1361 owp->nd_eoff = nfsd->nd_eoff; 1362 } else 1363 m_freem(nfsd->nd_mrep); 1364 nfsd->nd_mrep = NULL; 1365 if (nfsd->nd_stable == NFSV3WRITE_FILESYNC) 1366 owp->nd_stable = NFSV3WRITE_FILESYNC; 1367 else if (nfsd->nd_stable == NFSV3WRITE_DATASYNC && 1368 owp->nd_stable == NFSV3WRITE_UNSTABLE) 1369 owp->nd_stable = NFSV3WRITE_DATASYNC; 1370 LIST_INSERT_HEAD(&owp->nd_coalesce, nfsd, nd_tq); 1371 /* 1372 * nfsd might hold coalesce elements! Move them to owp. 1373 * Otherwise, requests may be lost and clients will be stuck. 1374 */ 1375 while ((m = LIST_FIRST(&nfsd->nd_coalesce)) != NULL) { 1376 LIST_REMOVE(m, nd_tq); 1377 LIST_INSERT_HEAD(&owp->nd_coalesce, m, nd_tq); 1378 } 1379 } 1380 1381 /* 1382 * nfs create service 1383 * now does a truncate to 0 length via. setattr if it already exists 1384 */ 1385 int 1386 nfsrv_create(nfsd, slp, lwp, mrq) 1387 struct nfsrv_descript *nfsd; 1388 struct nfssvc_sock *slp; 1389 struct lwp *lwp; 1390 struct mbuf **mrq; 1391 { 1392 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1393 struct mbuf *nam = nfsd->nd_nam; 1394 caddr_t dpos = nfsd->nd_dpos; 1395 kauth_cred_t cred = nfsd->nd_cr; 1396 struct nfs_fattr *fp; 1397 struct vattr va, dirfor, diraft; 1398 struct nfsv2_sattr *sp; 1399 u_int32_t *tl; 1400 struct nameidata nd; 1401 caddr_t cp; 1402 int32_t t1; 1403 caddr_t bpos; 1404 int error = 0, cache = 0, len, tsize, dirfor_ret = 1, diraft_ret = 1; 1405 int rdev = 0; 1406 int v3 = (nfsd->nd_flag & ND_NFSV3), how, exclusive_flag = 0; 1407 char *cp2; 1408 struct mbuf *mb, *mreq; 1409 struct vnode *vp = NULL, *dirp = NULL; 1410 nfsrvfh_t nsfh; 1411 u_quad_t frev, tempsize; 1412 u_char cverf[NFSX_V3CREATEVERF]; 1413 struct mount *mp = NULL; 1414 1415 nd.ni_cnd.cn_nameiop = 0; 1416 nfsm_srvmtofh(&nsfh); 1417 if ((mp = vfs_getvfs(&NFSRVFH_FHANDLE(&nsfh)->fh_fsid)) == NULL) 1418 return (ESTALE); 1419 vn_start_write(NULL, &mp, V_WAIT); 1420 nfsm_srvnamesiz(len); 1421 nd.ni_cnd.cn_cred = cred; 1422 nd.ni_cnd.cn_nameiop = CREATE; 1423 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 1424 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 1425 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1426 if (dirp && v3) { 1427 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, lwp); 1428 } 1429 if (error) { 1430 nfsm_reply(NFSX_WCCDATA(v3)); 1431 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1432 if (dirp) 1433 vrele(dirp); 1434 vn_finished_write(mp, 0); 1435 return (0); 1436 } 1437 VATTR_NULL(&va); 1438 if (v3) { 1439 va.va_mode = 0; 1440 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1441 how = fxdr_unsigned(int, *tl); 1442 switch (how) { 1443 case NFSV3CREATE_GUARDED: 1444 if (nd.ni_vp) { 1445 error = EEXIST; 1446 break; 1447 } 1448 case NFSV3CREATE_UNCHECKED: 1449 nfsm_srvsattr(&va); 1450 break; 1451 case NFSV3CREATE_EXCLUSIVE: 1452 nfsm_dissect(cp, caddr_t, NFSX_V3CREATEVERF); 1453 memcpy(cverf, cp, NFSX_V3CREATEVERF); 1454 exclusive_flag = 1; 1455 break; 1456 }; 1457 va.va_type = VREG; 1458 } else { 1459 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1460 va.va_type = IFTOVT(fxdr_unsigned(u_int32_t, sp->sa_mode)); 1461 if (va.va_type == VNON) 1462 va.va_type = VREG; 1463 va.va_mode = nfstov_mode(sp->sa_mode); 1464 switch (va.va_type) { 1465 case VREG: 1466 tsize = fxdr_unsigned(int32_t, sp->sa_size); 1467 if (tsize != -1) 1468 va.va_size = (u_quad_t)tsize; 1469 break; 1470 case VCHR: 1471 case VBLK: 1472 case VFIFO: 1473 rdev = fxdr_unsigned(int32_t, sp->sa_size); 1474 break; 1475 default: 1476 break; 1477 }; 1478 } 1479 1480 /* 1481 * Iff doesn't exist, create it 1482 * otherwise just truncate to 0 length 1483 * should I set the mode too ?? 1484 */ 1485 if (nd.ni_vp == NULL) { 1486 if (va.va_type == VREG || va.va_type == VSOCK) { 1487 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1488 error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1489 if (!error) { 1490 if (exclusive_flag) { 1491 exclusive_flag = 0; 1492 VATTR_NULL(&va); 1493 /* 1494 * XXX 1495 * assuming NFSX_V3CREATEVERF 1496 * == sizeof(nfstime3) 1497 */ 1498 fxdr_nfsv3time(cverf, &va.va_atime); 1499 error = VOP_SETATTR(nd.ni_vp, &va, cred, 1500 lwp); 1501 } 1502 } 1503 } else if (va.va_type == VCHR || va.va_type == VBLK || 1504 va.va_type == VFIFO) { 1505 if (va.va_type == VCHR && rdev == 0xffffffff) 1506 va.va_type = VFIFO; 1507 if (va.va_type != VFIFO && 1508 (error = kauth_authorize_generic(cred, 1509 KAUTH_GENERIC_ISSUSER, NULL))) { 1510 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1511 vput(nd.ni_dvp); 1512 nfsm_reply(0); 1513 vn_finished_write(mp, 0); 1514 return (error); 1515 } else 1516 va.va_rdev = (dev_t)rdev; 1517 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1518 error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, 1519 &va); 1520 if (error) { 1521 nfsm_reply(0); 1522 } 1523 if (nd.ni_cnd.cn_flags & ISSYMLINK) { 1524 vput(nd.ni_vp); 1525 vrele(nd.ni_dvp); 1526 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1527 error = EINVAL; 1528 nfsm_reply(0); 1529 } 1530 } else { 1531 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1532 vput(nd.ni_dvp); 1533 error = ENXIO; 1534 } 1535 vp = nd.ni_vp; 1536 } else { 1537 vp = nd.ni_vp; 1538 if (nd.ni_dvp == vp) 1539 vrele(nd.ni_dvp); 1540 else 1541 vput(nd.ni_dvp); 1542 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1543 if (!error && va.va_size != -1) { 1544 error = nfsrv_access(vp, VWRITE, cred, 1545 (nd.ni_cnd.cn_flags & RDONLY), lwp, 0); 1546 if (!error) { 1547 nqsrv_getl(vp, ND_WRITE); 1548 tempsize = va.va_size; 1549 VATTR_NULL(&va); 1550 va.va_size = tempsize; 1551 error = VOP_SETATTR(vp, &va, cred, lwp); 1552 } 1553 } 1554 if (error) 1555 vput(vp); 1556 } 1557 if (!error) { 1558 error = nfsrv_composefh(vp, &nsfh, v3); 1559 if (!error) 1560 error = VOP_GETATTR(vp, &va, cred, lwp); 1561 vput(vp); 1562 } 1563 if (v3) { 1564 if (exclusive_flag && !error) { 1565 /* 1566 * XXX assuming NFSX_V3CREATEVERF == sizeof(nfstime3) 1567 */ 1568 char oldverf[NFSX_V3CREATEVERF]; 1569 1570 txdr_nfsv3time(&va.va_atime, oldverf); 1571 if (memcmp(cverf, oldverf, NFSX_V3CREATEVERF)) 1572 error = EEXIST; 1573 } 1574 if (dirp) { 1575 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, lwp); 1576 } 1577 } 1578 if (dirp) { 1579 vrele(dirp); 1580 } 1581 nfsm_reply(NFSX_SRVFH(&nsfh, v3) + NFSX_FATTR(v3) + NFSX_WCCDATA(v3)); 1582 if (v3) { 1583 if (!error) { 1584 nfsm_srvpostop_fh(&nsfh); 1585 nfsm_srvpostop_attr(0, &va); 1586 } 1587 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1588 } else { 1589 nfsm_srvfhtom(&nsfh, v3); 1590 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 1591 nfsm_srvfillattr(&va, fp); 1592 } 1593 vn_finished_write(mp, 0); 1594 return (0); 1595 nfsmout: 1596 if (dirp) 1597 vrele(dirp); 1598 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1599 if (nd.ni_dvp == nd.ni_vp) 1600 vrele(nd.ni_dvp); 1601 else 1602 vput(nd.ni_dvp); 1603 if (nd.ni_vp) 1604 vput(nd.ni_vp); 1605 vn_finished_write(mp, 0); 1606 return (error); 1607 } 1608 1609 /* 1610 * nfs v3 mknod service 1611 */ 1612 int 1613 nfsrv_mknod(nfsd, slp, lwp, mrq) 1614 struct nfsrv_descript *nfsd; 1615 struct nfssvc_sock *slp; 1616 struct lwp *lwp; 1617 struct mbuf **mrq; 1618 { 1619 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1620 struct mbuf *nam = nfsd->nd_nam; 1621 caddr_t dpos = nfsd->nd_dpos; 1622 kauth_cred_t cred = nfsd->nd_cr; 1623 struct vattr va, dirfor, diraft; 1624 u_int32_t *tl; 1625 struct nameidata nd; 1626 int32_t t1; 1627 caddr_t bpos; 1628 int error = 0, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 1629 u_int32_t major, minor; 1630 enum vtype vtyp; 1631 char *cp2; 1632 struct mbuf *mb, *mreq; 1633 struct vnode *vp, *dirp = (struct vnode *)0; 1634 nfsrvfh_t nsfh; 1635 u_quad_t frev; 1636 struct mount *mp = NULL; 1637 1638 nd.ni_cnd.cn_nameiop = 0; 1639 nfsm_srvmtofh(&nsfh); 1640 if ((mp = vfs_getvfs(&NFSRVFH_FHANDLE(&nsfh)->fh_fsid)) == NULL) 1641 return (ESTALE); 1642 vn_start_write(NULL, &mp, V_WAIT); 1643 nfsm_srvnamesiz(len); 1644 nd.ni_cnd.cn_cred = cred; 1645 nd.ni_cnd.cn_nameiop = CREATE; 1646 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 1647 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 1648 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1649 if (dirp) 1650 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, lwp); 1651 if (error) { 1652 nfsm_reply(NFSX_WCCDATA(1)); 1653 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1654 if (dirp) 1655 vrele(dirp); 1656 vn_finished_write(mp, 0); 1657 return (0); 1658 } 1659 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1660 vtyp = nfsv3tov_type(*tl); 1661 if (vtyp != VCHR && vtyp != VBLK && vtyp != VSOCK && vtyp != VFIFO) { 1662 error = NFSERR_BADTYPE; 1663 goto abort; 1664 } 1665 VATTR_NULL(&va); 1666 va.va_mode = 0; 1667 nfsm_srvsattr(&va); 1668 if (vtyp == VCHR || vtyp == VBLK) { 1669 dev_t rdev; 1670 1671 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1672 major = fxdr_unsigned(u_int32_t, *tl++); 1673 minor = fxdr_unsigned(u_int32_t, *tl); 1674 rdev = makedev(major, minor); 1675 if (major(rdev) != major || minor(rdev) != minor) { 1676 error = EINVAL; 1677 goto abort; 1678 } 1679 va.va_rdev = rdev; 1680 } 1681 1682 /* 1683 * Iff doesn't exist, create it. 1684 */ 1685 if (nd.ni_vp) { 1686 error = EEXIST; 1687 abort: 1688 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1689 if (nd.ni_dvp == nd.ni_vp) 1690 vrele(nd.ni_dvp); 1691 else 1692 vput(nd.ni_dvp); 1693 if (nd.ni_vp) 1694 vput(nd.ni_vp); 1695 goto out; 1696 } 1697 va.va_type = vtyp; 1698 if (vtyp == VSOCK) { 1699 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1700 error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1701 } else { 1702 if (va.va_type != VFIFO && 1703 (error = kauth_authorize_generic(cred, 1704 KAUTH_GENERIC_ISSUSER, NULL))) { 1705 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1706 vput(nd.ni_dvp); 1707 goto out; 1708 } 1709 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1710 error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1711 if (error) 1712 goto out; 1713 if (nd.ni_cnd.cn_flags & ISSYMLINK) { 1714 vput(nd.ni_vp); 1715 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1716 error = EINVAL; 1717 } 1718 } 1719 out: 1720 vp = nd.ni_vp; 1721 if (!error) { 1722 error = nfsrv_composefh(vp, &nsfh, TRUE); 1723 if (!error) 1724 error = VOP_GETATTR(vp, &va, cred, lwp); 1725 vput(vp); 1726 } 1727 if (dirp) { 1728 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, lwp); 1729 vrele(dirp); 1730 } 1731 nfsm_reply(NFSX_SRVFH(&nsfh, TRUE) + NFSX_POSTOPATTR(1) + 1732 NFSX_WCCDATA(1)); 1733 if (!error) { 1734 nfsm_srvpostop_fh(&nsfh); 1735 nfsm_srvpostop_attr(0, &va); 1736 } 1737 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1738 vn_finished_write(mp, 0); 1739 return (0); 1740 nfsmout: 1741 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1742 if (nd.ni_dvp == nd.ni_vp) 1743 vrele(nd.ni_dvp); 1744 else 1745 vput(nd.ni_dvp); 1746 if (nd.ni_vp) 1747 vput(nd.ni_vp); 1748 if (dirp) 1749 vrele(dirp); 1750 vn_finished_write(mp, 0); 1751 return (error); 1752 } 1753 1754 /* 1755 * nfs remove service 1756 */ 1757 int 1758 nfsrv_remove(nfsd, slp, lwp, mrq) 1759 struct nfsrv_descript *nfsd; 1760 struct nfssvc_sock *slp; 1761 struct lwp *lwp; 1762 struct mbuf **mrq; 1763 { 1764 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1765 struct mbuf *nam = nfsd->nd_nam; 1766 caddr_t dpos = nfsd->nd_dpos; 1767 kauth_cred_t cred = nfsd->nd_cr; 1768 struct nameidata nd; 1769 u_int32_t *tl; 1770 int32_t t1; 1771 caddr_t bpos; 1772 int error = 0, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 1773 int v3 = (nfsd->nd_flag & ND_NFSV3); 1774 char *cp2; 1775 struct mbuf *mb, *mreq; 1776 struct vnode *vp, *dirp; 1777 struct vattr dirfor, diraft; 1778 nfsrvfh_t nsfh; 1779 u_quad_t frev; 1780 struct mount *mp = NULL; 1781 1782 #ifndef nolint 1783 vp = (struct vnode *)0; 1784 #endif 1785 nfsm_srvmtofh(&nsfh); 1786 if ((mp = vfs_getvfs(&NFSRVFH_FHANDLE(&nsfh)->fh_fsid)) == NULL) 1787 return (ESTALE); 1788 vn_start_write(NULL, &mp, V_WAIT); 1789 nfsm_srvnamesiz(len); 1790 nd.ni_cnd.cn_cred = cred; 1791 nd.ni_cnd.cn_nameiop = DELETE; 1792 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 1793 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 1794 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1795 if (dirp && v3) { 1796 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, lwp); 1797 } 1798 if (!error) { 1799 vp = nd.ni_vp; 1800 if (vp->v_type == VDIR && 1801 (error = kauth_authorize_generic(cred, 1802 KAUTH_GENERIC_ISSUSER, NULL)) != 0) 1803 goto out; 1804 /* 1805 * The root of a mounted filesystem cannot be deleted. 1806 */ 1807 if (vp->v_flag & VROOT) { 1808 error = EBUSY; 1809 goto out; 1810 } 1811 out: 1812 if (!error) { 1813 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1814 nqsrv_getl(vp, ND_WRITE); 1815 error = VOP_REMOVE(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); 1816 } else { 1817 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1818 if (nd.ni_dvp == vp) 1819 vrele(nd.ni_dvp); 1820 else 1821 vput(nd.ni_dvp); 1822 vput(vp); 1823 } 1824 } 1825 if (dirp) { 1826 if (v3) { 1827 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, lwp); 1828 } 1829 vrele(dirp); 1830 } 1831 nfsm_reply(NFSX_WCCDATA(v3)); 1832 if (v3) { 1833 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1834 vn_finished_write(mp, 0); 1835 return (0); 1836 } 1837 vn_finished_write(mp, 0); 1838 nfsm_srvdone; 1839 } 1840 1841 /* 1842 * nfs rename service 1843 */ 1844 int 1845 nfsrv_rename(nfsd, slp, lwp, mrq) 1846 struct nfsrv_descript *nfsd; 1847 struct nfssvc_sock *slp; 1848 struct lwp *lwp; 1849 struct mbuf **mrq; 1850 { 1851 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1852 struct mbuf *nam = nfsd->nd_nam; 1853 caddr_t dpos = nfsd->nd_dpos; 1854 kauth_cred_t cred = nfsd->nd_cr; 1855 u_int32_t *tl; 1856 int32_t t1; 1857 caddr_t bpos; 1858 int error = 0, cache = 0, fdirfor_ret = 1, fdiraft_ret = 1; 1859 uint32_t len, len2; 1860 int tdirfor_ret = 1, tdiraft_ret = 1; 1861 int v3 = (nfsd->nd_flag & ND_NFSV3); 1862 char *cp2; 1863 struct mbuf *mb, *mreq; 1864 struct nameidata fromnd, tond; 1865 struct vnode *fvp, *tvp, *tdvp; 1866 struct vnode *fdirp = NULL, *tdirp = NULL; 1867 struct vattr fdirfor, fdiraft, tdirfor, tdiraft; 1868 nfsrvfh_t fnsfh, tnsfh; 1869 u_quad_t frev; 1870 uid_t saved_uid; 1871 struct mount *mp = NULL; 1872 1873 #ifndef nolint 1874 fvp = (struct vnode *)0; 1875 #endif 1876 fromnd.ni_cnd.cn_nameiop = 0; 1877 tond.ni_cnd.cn_nameiop = 0; 1878 nfsm_srvmtofh(&fnsfh); 1879 if ((mp = vfs_getvfs(&NFSRVFH_FHANDLE(&fnsfh)->fh_fsid)) == NULL) 1880 return (ESTALE); 1881 vn_start_write(NULL, &mp, V_WAIT); 1882 nfsm_srvnamesiz(len); 1883 /* 1884 * Remember our original uid so that we can reset cr_uid before 1885 * the second nfs_namei() call, in case it is remapped. 1886 */ 1887 saved_uid = kauth_cred_geteuid(cred); 1888 fromnd.ni_cnd.cn_cred = cred; 1889 fromnd.ni_cnd.cn_nameiop = DELETE; 1890 fromnd.ni_cnd.cn_flags = LOCKPARENT | SAVESTART; 1891 error = nfs_namei(&fromnd, &fnsfh, len, slp, nam, &md, 1892 &dpos, &fdirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1893 if (fdirp && v3) { 1894 fdirfor_ret = VOP_GETATTR(fdirp, &fdirfor, cred, lwp); 1895 } 1896 if (error) { 1897 nfsm_reply(2 * NFSX_WCCDATA(v3)); 1898 nfsm_srvwcc_data(fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft); 1899 nfsm_srvwcc_data(tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft); 1900 if (fdirp) 1901 vput(fdirp); 1902 vn_finished_write(mp, 0); 1903 return (0); 1904 } 1905 VOP_UNLOCK(fdirp, 0); 1906 fvp = fromnd.ni_vp; 1907 nfsm_srvmtofh(&tnsfh); 1908 if (v3) { 1909 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 1910 len2 = fxdr_unsigned(uint32_t, *tl); 1911 /* len2 will be checked by nfs_namei */ 1912 } 1913 else { 1914 /* NFSv2 */ 1915 nfsm_strsiz(len2, NFS_MAXNAMLEN); 1916 } 1917 kauth_cred_seteuid(cred, saved_uid); 1918 tond.ni_cnd.cn_cred = cred; 1919 tond.ni_cnd.cn_nameiop = RENAME; 1920 tond.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF | NOCACHE | SAVESTART; 1921 error = nfs_namei(&tond, &tnsfh, len2, slp, nam, &md, 1922 &dpos, &tdirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1923 if (tdirp && v3) { 1924 tdirfor_ret = VOP_GETATTR(tdirp, &tdirfor, cred, lwp); 1925 } 1926 if (error) { 1927 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 1928 vrele(fromnd.ni_dvp); 1929 vrele(fvp); 1930 goto out1; 1931 } 1932 tdvp = tond.ni_dvp; 1933 tvp = tond.ni_vp; 1934 if (tvp != NULL) { 1935 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 1936 if (v3) 1937 error = EEXIST; 1938 else 1939 error = EISDIR; 1940 goto out; 1941 } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 1942 if (v3) 1943 error = EEXIST; 1944 else 1945 error = ENOTDIR; 1946 goto out; 1947 } 1948 if (tvp->v_type == VDIR && tvp->v_mountedhere) { 1949 if (v3) 1950 error = EXDEV; 1951 else 1952 error = ENOTEMPTY; 1953 goto out; 1954 } 1955 } 1956 if (fvp->v_type == VDIR && fvp->v_mountedhere) { 1957 if (v3) 1958 error = EXDEV; 1959 else 1960 error = ENOTEMPTY; 1961 goto out; 1962 } 1963 if (fvp->v_mount != tdvp->v_mount) { 1964 if (v3) 1965 error = EXDEV; 1966 else 1967 error = ENOTEMPTY; 1968 goto out; 1969 } 1970 if (fvp == tdvp) { 1971 if (v3) 1972 error = EINVAL; 1973 else 1974 error = ENOTEMPTY; 1975 } 1976 /* 1977 * If source is the same as the destination (that is the 1978 * same vnode with the same name in the same directory), 1979 * then there is nothing to do. 1980 */ 1981 if (fvp == tvp && fromnd.ni_dvp == tdvp && 1982 fromnd.ni_cnd.cn_namelen == tond.ni_cnd.cn_namelen && 1983 !memcmp(fromnd.ni_cnd.cn_nameptr, tond.ni_cnd.cn_nameptr, 1984 fromnd.ni_cnd.cn_namelen)) 1985 error = -1; 1986 out: 1987 if (!error) { 1988 nqsrv_getl(fromnd.ni_dvp, ND_WRITE); 1989 nqsrv_getl(tdvp, ND_WRITE); 1990 if (tvp) { 1991 nqsrv_getl(tvp, ND_WRITE); 1992 } 1993 error = VOP_RENAME(fromnd.ni_dvp, fromnd.ni_vp, &fromnd.ni_cnd, 1994 tond.ni_dvp, tond.ni_vp, &tond.ni_cnd); 1995 } else { 1996 VOP_ABORTOP(tond.ni_dvp, &tond.ni_cnd); 1997 if (tdvp == tvp) 1998 vrele(tdvp); 1999 else 2000 vput(tdvp); 2001 if (tvp) 2002 vput(tvp); 2003 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 2004 vrele(fromnd.ni_dvp); 2005 vrele(fvp); 2006 if (error == -1) 2007 error = 0; 2008 } 2009 vrele(tond.ni_startdir); 2010 PNBUF_PUT(tond.ni_cnd.cn_pnbuf); 2011 out1: 2012 if (fdirp) { 2013 if (v3) { 2014 fdiraft_ret = VOP_GETATTR(fdirp, &fdiraft, cred, lwp); 2015 } 2016 vrele(fdirp); 2017 } 2018 if (tdirp) { 2019 if (v3) { 2020 tdiraft_ret = VOP_GETATTR(tdirp, &tdiraft, cred, lwp); 2021 } 2022 vrele(tdirp); 2023 } 2024 vrele(fromnd.ni_startdir); 2025 PNBUF_PUT(fromnd.ni_cnd.cn_pnbuf); 2026 nfsm_reply(2 * NFSX_WCCDATA(v3)); 2027 if (v3) { 2028 nfsm_srvwcc_data(fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft); 2029 nfsm_srvwcc_data(tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft); 2030 } 2031 vn_finished_write(mp, 0); 2032 return (0); 2033 2034 nfsmout: 2035 if (fdirp) 2036 vrele(fdirp); 2037 #ifdef notdef 2038 if (tdirp) 2039 vrele(tdirp); 2040 #endif 2041 if (tond.ni_cnd.cn_nameiop) { 2042 vrele(tond.ni_startdir); 2043 PNBUF_PUT(tond.ni_cnd.cn_pnbuf); 2044 } 2045 if (fromnd.ni_cnd.cn_nameiop) { 2046 vrele(fromnd.ni_startdir); 2047 PNBUF_PUT(fromnd.ni_cnd.cn_pnbuf); 2048 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 2049 vrele(fromnd.ni_dvp); 2050 vrele(fvp); 2051 } 2052 return (error); 2053 } 2054 2055 /* 2056 * nfs link service 2057 */ 2058 int 2059 nfsrv_link(nfsd, slp, lwp, mrq) 2060 struct nfsrv_descript *nfsd; 2061 struct nfssvc_sock *slp; 2062 struct lwp *lwp; 2063 struct mbuf **mrq; 2064 { 2065 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2066 struct mbuf *nam = nfsd->nd_nam; 2067 caddr_t dpos = nfsd->nd_dpos; 2068 kauth_cred_t cred = nfsd->nd_cr; 2069 struct nameidata nd; 2070 u_int32_t *tl; 2071 int32_t t1; 2072 caddr_t bpos; 2073 int error = 0, rdonly, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 2074 int getret = 1, v3 = (nfsd->nd_flag & ND_NFSV3); 2075 char *cp2; 2076 struct mbuf *mb, *mreq; 2077 struct vnode *vp, *xp, *dirp = (struct vnode *)0; 2078 struct vattr dirfor, diraft, at; 2079 nfsrvfh_t nsfh, dnsfh; 2080 u_quad_t frev; 2081 struct mount *mp = NULL; 2082 2083 nfsm_srvmtofh(&nsfh); 2084 if ((mp = vfs_getvfs(&NFSRVFH_FHANDLE(&nsfh)->fh_fsid)) == NULL) 2085 return (ESTALE); 2086 vn_start_write(NULL, &mp, V_WAIT); 2087 nfsm_srvmtofh(&dnsfh); 2088 nfsm_srvnamesiz(len); 2089 error = nfsrv_fhtovp(&nsfh, FALSE, &vp, cred, slp, nam, 2090 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2091 if (error) { 2092 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2093 nfsm_srvpostop_attr(getret, &at); 2094 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2095 vn_finished_write(mp, 0); 2096 return (0); 2097 } 2098 if (vp->v_type == VDIR && (error = kauth_authorize_generic(cred, 2099 KAUTH_GENERIC_ISSUSER, NULL)) != 0) 2100 goto out1; 2101 nd.ni_cnd.cn_cred = cred; 2102 nd.ni_cnd.cn_nameiop = CREATE; 2103 nd.ni_cnd.cn_flags = LOCKPARENT; 2104 error = nfs_namei(&nd, &dnsfh, len, slp, nam, &md, &dpos, 2105 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2106 if (dirp && v3) { 2107 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, lwp); 2108 } 2109 if (error) 2110 goto out1; 2111 xp = nd.ni_vp; 2112 if (xp != NULL) { 2113 error = EEXIST; 2114 goto out; 2115 } 2116 xp = nd.ni_dvp; 2117 if (vp->v_mount != xp->v_mount) 2118 error = EXDEV; 2119 out: 2120 if (!error) { 2121 nqsrv_getl(vp, ND_WRITE); 2122 nqsrv_getl(xp, ND_WRITE); 2123 error = VOP_LINK(nd.ni_dvp, vp, &nd.ni_cnd); 2124 } else { 2125 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2126 if (nd.ni_dvp == nd.ni_vp) 2127 vrele(nd.ni_dvp); 2128 else 2129 vput(nd.ni_dvp); 2130 if (nd.ni_vp) 2131 vrele(nd.ni_vp); 2132 } 2133 out1: 2134 if (v3) 2135 getret = VOP_GETATTR(vp, &at, cred, lwp); 2136 if (dirp) { 2137 if (v3) { 2138 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, lwp); 2139 } 2140 vrele(dirp); 2141 } 2142 vrele(vp); 2143 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2144 if (v3) { 2145 nfsm_srvpostop_attr(getret, &at); 2146 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2147 vn_finished_write(mp, 0); 2148 return (0); 2149 } 2150 vn_finished_write(mp, 0); 2151 nfsm_srvdone; 2152 } 2153 2154 /* 2155 * nfs symbolic link service 2156 */ 2157 int 2158 nfsrv_symlink(nfsd, slp, lwp, mrq) 2159 struct nfsrv_descript *nfsd; 2160 struct nfssvc_sock *slp; 2161 struct lwp *lwp; 2162 struct mbuf **mrq; 2163 { 2164 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2165 struct mbuf *nam = nfsd->nd_nam; 2166 caddr_t dpos = nfsd->nd_dpos; 2167 kauth_cred_t cred = nfsd->nd_cr; 2168 struct vattr va, dirfor, diraft; 2169 struct nameidata nd; 2170 u_int32_t *tl; 2171 int32_t t1; 2172 struct nfsv2_sattr *sp; 2173 char *bpos, *pathcp = NULL, *cp2; 2174 struct uio io; 2175 struct iovec iv; 2176 int error = 0, cache = 0, dirfor_ret = 1, diraft_ret = 1; 2177 uint32_t len, len2; 2178 int v3 = (nfsd->nd_flag & ND_NFSV3); 2179 struct mbuf *mb, *mreq; 2180 struct vnode *dirp = (struct vnode *)0; 2181 nfsrvfh_t nsfh; 2182 u_quad_t frev; 2183 struct mount *mp = NULL; 2184 2185 nd.ni_cnd.cn_nameiop = 0; 2186 nfsm_srvmtofh(&nsfh); 2187 if ((mp = vfs_getvfs(&NFSRVFH_FHANDLE(&nsfh)->fh_fsid)) == NULL) 2188 return (ESTALE); 2189 vn_start_write(NULL, &mp, V_WAIT); 2190 nfsm_srvnamesiz(len); 2191 nd.ni_cnd.cn_cred = cred; 2192 nd.ni_cnd.cn_nameiop = CREATE; 2193 nd.ni_cnd.cn_flags = LOCKPARENT; 2194 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 2195 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2196 if (dirp && v3) { 2197 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, lwp); 2198 } 2199 if (error) 2200 goto out; 2201 VATTR_NULL(&va); 2202 va.va_type = VLNK; 2203 if (v3) { 2204 va.va_mode = 0; 2205 nfsm_srvsattr(&va); 2206 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 2207 len2 = fxdr_unsigned(uint32_t, *tl); 2208 if (len2 > PATH_MAX) { 2209 /* XXX should check _PC_NO_TRUNC */ 2210 error = ENAMETOOLONG; 2211 goto abortop; 2212 } 2213 } 2214 else { 2215 /* NFSv2 */ 2216 nfsm_strsiz(len2, NFS_MAXPATHLEN); 2217 } 2218 pathcp = malloc(len2 + 1, M_TEMP, M_WAITOK); 2219 iv.iov_base = pathcp; 2220 iv.iov_len = len2; 2221 io.uio_resid = len2; 2222 io.uio_offset = 0; 2223 io.uio_iov = &iv; 2224 io.uio_iovcnt = 1; 2225 io.uio_rw = UIO_READ; 2226 UIO_SETUP_SYSSPACE(&io); 2227 nfsm_mtouio(&io, len2); 2228 if (!v3) { 2229 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2230 va.va_mode = fxdr_unsigned(u_int16_t, sp->sa_mode); 2231 } 2232 *(pathcp + len2) = '\0'; 2233 if (nd.ni_vp) { 2234 error = EEXIST; 2235 abortop: 2236 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2237 if (nd.ni_dvp == nd.ni_vp) 2238 vrele(nd.ni_dvp); 2239 else 2240 vput(nd.ni_dvp); 2241 if (nd.ni_vp) 2242 vrele(nd.ni_vp); 2243 goto out; 2244 } 2245 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2246 error = VOP_SYMLINK(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va, pathcp); 2247 if (!error) { 2248 if (v3) { 2249 error = nfsrv_composefh(nd.ni_vp, &nsfh, v3); 2250 if (!error) 2251 error = VOP_GETATTR(nd.ni_vp, &va, cred, lwp); 2252 vput(nd.ni_vp); 2253 } else { 2254 vput(nd.ni_vp); 2255 } 2256 } 2257 out: 2258 if (pathcp) 2259 free(pathcp, M_TEMP); 2260 if (dirp) { 2261 if (v3) { 2262 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, lwp); 2263 } 2264 vrele(dirp); 2265 } 2266 nfsm_reply(NFSX_SRVFH(&nsfh, v3) + NFSX_POSTOPATTR(v3) + 2267 NFSX_WCCDATA(v3)); 2268 if (v3) { 2269 if (!error) { 2270 nfsm_srvpostop_fh(&nsfh); 2271 nfsm_srvpostop_attr(0, &va); 2272 } 2273 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2274 } 2275 vn_finished_write(mp, 0); 2276 return (0); 2277 nfsmout: 2278 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2279 if (nd.ni_dvp == nd.ni_vp) 2280 vrele(nd.ni_dvp); 2281 else 2282 vput(nd.ni_dvp); 2283 if (nd.ni_vp) 2284 vrele(nd.ni_vp); 2285 if (dirp) 2286 vrele(dirp); 2287 if (pathcp) 2288 free(pathcp, M_TEMP); 2289 vn_finished_write(mp, 0); 2290 return (error); 2291 } 2292 2293 /* 2294 * nfs mkdir service 2295 */ 2296 int 2297 nfsrv_mkdir(nfsd, slp, lwp, mrq) 2298 struct nfsrv_descript *nfsd; 2299 struct nfssvc_sock *slp; 2300 struct lwp *lwp; 2301 struct mbuf **mrq; 2302 { 2303 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2304 struct mbuf *nam = nfsd->nd_nam; 2305 caddr_t dpos = nfsd->nd_dpos; 2306 kauth_cred_t cred = nfsd->nd_cr; 2307 struct vattr va, dirfor, diraft; 2308 struct nfs_fattr *fp; 2309 struct nameidata nd; 2310 caddr_t cp; 2311 u_int32_t *tl; 2312 int32_t t1; 2313 caddr_t bpos; 2314 int error = 0, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 2315 int v3 = (nfsd->nd_flag & ND_NFSV3); 2316 char *cp2; 2317 struct mbuf *mb, *mreq; 2318 struct vnode *vp, *dirp = (struct vnode *)0; 2319 nfsrvfh_t nsfh; 2320 u_quad_t frev; 2321 struct mount *mp = NULL; 2322 2323 nfsm_srvmtofh(&nsfh); 2324 if ((mp = vfs_getvfs(&NFSRVFH_FHANDLE(&nsfh)->fh_fsid)) == NULL) 2325 return (ESTALE); 2326 vn_start_write(NULL, &mp, V_WAIT); 2327 nfsm_srvnamesiz(len); 2328 nd.ni_cnd.cn_cred = cred; 2329 nd.ni_cnd.cn_nameiop = CREATE; 2330 nd.ni_cnd.cn_flags = LOCKPARENT; 2331 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 2332 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2333 if (dirp && v3) { 2334 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, lwp); 2335 } 2336 if (error) { 2337 nfsm_reply(NFSX_WCCDATA(v3)); 2338 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2339 if (dirp) 2340 vrele(dirp); 2341 vn_finished_write(mp, 0); 2342 return (0); 2343 } 2344 VATTR_NULL(&va); 2345 if (v3) { 2346 va.va_mode = 0; 2347 nfsm_srvsattr(&va); 2348 } else { 2349 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2350 va.va_mode = nfstov_mode(*tl++); 2351 } 2352 va.va_type = VDIR; 2353 vp = nd.ni_vp; 2354 if (vp != NULL) { 2355 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2356 if (nd.ni_dvp == vp) 2357 vrele(nd.ni_dvp); 2358 else 2359 vput(nd.ni_dvp); 2360 vrele(vp); 2361 error = EEXIST; 2362 goto out; 2363 } 2364 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2365 error = VOP_MKDIR(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 2366 if (!error) { 2367 vp = nd.ni_vp; 2368 error = nfsrv_composefh(vp, &nsfh, v3); 2369 if (!error) 2370 error = VOP_GETATTR(vp, &va, cred, lwp); 2371 vput(vp); 2372 } 2373 out: 2374 if (dirp) { 2375 if (v3) { 2376 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, lwp); 2377 } 2378 vrele(dirp); 2379 } 2380 nfsm_reply(NFSX_SRVFH(&nsfh, v3) + NFSX_POSTOPATTR(v3) + 2381 NFSX_WCCDATA(v3)); 2382 if (v3) { 2383 if (!error) { 2384 nfsm_srvpostop_fh(&nsfh); 2385 nfsm_srvpostop_attr(0, &va); 2386 } 2387 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2388 } else { 2389 nfsm_srvfhtom(&nsfh, v3); 2390 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 2391 nfsm_srvfillattr(&va, fp); 2392 } 2393 vn_finished_write(mp, 0); 2394 return (0); 2395 nfsmout: 2396 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2397 if (nd.ni_dvp == nd.ni_vp) 2398 vrele(nd.ni_dvp); 2399 else 2400 vput(nd.ni_dvp); 2401 if (nd.ni_vp) 2402 vrele(nd.ni_vp); 2403 if (dirp) 2404 vrele(dirp); 2405 vn_finished_write(mp, 0); 2406 return (error); 2407 } 2408 2409 /* 2410 * nfs rmdir service 2411 */ 2412 int 2413 nfsrv_rmdir(nfsd, slp, lwp, mrq) 2414 struct nfsrv_descript *nfsd; 2415 struct nfssvc_sock *slp; 2416 struct lwp *lwp; 2417 struct mbuf **mrq; 2418 { 2419 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2420 struct mbuf *nam = nfsd->nd_nam; 2421 caddr_t dpos = nfsd->nd_dpos; 2422 kauth_cred_t cred = nfsd->nd_cr; 2423 u_int32_t *tl; 2424 int32_t t1; 2425 caddr_t bpos; 2426 int error = 0, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 2427 int v3 = (nfsd->nd_flag & ND_NFSV3); 2428 char *cp2; 2429 struct mbuf *mb, *mreq; 2430 struct vnode *vp, *dirp = (struct vnode *)0; 2431 struct vattr dirfor, diraft; 2432 nfsrvfh_t nsfh; 2433 struct nameidata nd; 2434 u_quad_t frev; 2435 struct mount *mp = NULL; 2436 2437 nfsm_srvmtofh(&nsfh); 2438 if ((mp = vfs_getvfs(&NFSRVFH_FHANDLE(&nsfh)->fh_fsid)) == NULL) 2439 return (ESTALE); 2440 vn_start_write(NULL, &mp, V_WAIT); 2441 nfsm_srvnamesiz(len); 2442 nd.ni_cnd.cn_cred = cred; 2443 nd.ni_cnd.cn_nameiop = DELETE; 2444 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 2445 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 2446 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2447 if (dirp && v3) { 2448 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, lwp); 2449 } 2450 if (error) { 2451 nfsm_reply(NFSX_WCCDATA(v3)); 2452 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2453 if (dirp) 2454 vrele(dirp); 2455 vn_finished_write(mp, 0); 2456 return (0); 2457 } 2458 vp = nd.ni_vp; 2459 if (vp->v_type != VDIR) { 2460 error = ENOTDIR; 2461 goto out; 2462 } 2463 /* 2464 * No rmdir "." please. 2465 */ 2466 if (nd.ni_dvp == vp) { 2467 error = EINVAL; 2468 goto out; 2469 } 2470 /* 2471 * The root of a mounted filesystem cannot be deleted. 2472 */ 2473 if (vp->v_flag & VROOT) 2474 error = EBUSY; 2475 out: 2476 if (!error) { 2477 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2478 nqsrv_getl(vp, ND_WRITE); 2479 error = VOP_RMDIR(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); 2480 } else { 2481 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2482 if (nd.ni_dvp == nd.ni_vp) 2483 vrele(nd.ni_dvp); 2484 else 2485 vput(nd.ni_dvp); 2486 vput(vp); 2487 } 2488 if (dirp) { 2489 if (v3) { 2490 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, lwp); 2491 } 2492 vrele(dirp); 2493 } 2494 nfsm_reply(NFSX_WCCDATA(v3)); 2495 if (v3) { 2496 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2497 vn_finished_write(mp, 0); 2498 return (0); 2499 } 2500 vn_finished_write(mp, 0); 2501 nfsm_srvdone; 2502 } 2503 2504 /* 2505 * nfs readdir service 2506 * - mallocs what it thinks is enough to read 2507 * count rounded up to a multiple of NFS_SRVDIRBLKSIZ <= NFS_MAXREADDIR 2508 * - calls VOP_READDIR() 2509 * - loops around building the reply 2510 * if the output generated exceeds count break out of loop 2511 * The nfsm_clget macro is used here so that the reply will be packed 2512 * tightly in mbuf clusters. 2513 * - it only knows that it has encountered eof when the VOP_READDIR() 2514 * reads nothing 2515 * - as such one readdir rpc will return eof false although you are there 2516 * and then the next will return eof 2517 * - it trims out records with d_fileno == 0 2518 * this doesn't matter for Unix clients, but they might confuse clients 2519 * for other os'. 2520 * - it trims out records with d_type == DT_WHT 2521 * these cannot be seen through NFS (unless we extend the protocol) 2522 * NB: It is tempting to set eof to true if the VOP_READDIR() reads less 2523 * than requested, but this may not apply to all filesystems. For 2524 * example, client NFS does not { although it is never remote mounted 2525 * anyhow } 2526 * The alternate call nfsrv_readdirplus() does lookups as well. 2527 * PS: The NFS protocol spec. does not clarify what the "count" byte 2528 * argument is a count of.. just name strings and file id's or the 2529 * entire reply rpc or ... 2530 * I tried just file name and id sizes and it confused the Sun client, 2531 * so I am using the full rpc size now. The "paranoia.." comment refers 2532 * to including the status longwords that are not a part of the dir. 2533 * "entry" structures, but are in the rpc. 2534 */ 2535 2536 #define NFS_SRVDIRBLKSIZ 1024 2537 2538 struct flrep { 2539 nfsuint64 fl_off; 2540 u_int32_t fl_postopok; 2541 u_int32_t fl_fattr[NFSX_V3FATTR / sizeof (u_int32_t)]; 2542 u_int32_t fl_fhok; 2543 u_int32_t fl_fhsize; 2544 }; 2545 2546 int 2547 nfsrv_readdir(nfsd, slp, lwp, mrq) 2548 struct nfsrv_descript *nfsd; 2549 struct nfssvc_sock *slp; 2550 struct lwp *lwp; 2551 struct mbuf **mrq; 2552 { 2553 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2554 struct mbuf *nam = nfsd->nd_nam; 2555 caddr_t dpos = nfsd->nd_dpos; 2556 kauth_cred_t cred = nfsd->nd_cr; 2557 char *bp, *be; 2558 struct mbuf *mp; 2559 struct dirent *dp; 2560 caddr_t cp; 2561 u_int32_t *tl; 2562 int32_t t1; 2563 caddr_t bpos; 2564 struct mbuf *mb, *mreq, *mp2; 2565 char *cpos, *cend, *cp2, *rbuf; 2566 struct vnode *vp; 2567 struct vattr at; 2568 nfsrvfh_t nsfh; 2569 struct uio io; 2570 struct iovec iv; 2571 int len, nlen, rem, xfer, tsiz, i, error = 0, getret = 1; 2572 int siz, cnt, fullsiz, eofflag, rdonly, cache = 0, ncookies; 2573 int v3 = (nfsd->nd_flag & ND_NFSV3); 2574 u_quad_t frev, off, toff, verf; 2575 off_t *cookies = NULL, *cookiep; 2576 nfsuint64 jar; 2577 2578 nfsm_srvmtofh(&nsfh); 2579 if (v3) { 2580 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 2581 toff = fxdr_hyper(tl); 2582 tl += 2; 2583 verf = fxdr_hyper(tl); 2584 tl += 2; 2585 } else { 2586 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2587 toff = fxdr_unsigned(u_quad_t, *tl++); 2588 } 2589 off = toff; 2590 cnt = fxdr_unsigned(int, *tl); 2591 siz = ((cnt + NFS_SRVDIRBLKSIZ - 1) & ~(NFS_SRVDIRBLKSIZ - 1)); 2592 xfer = NFS_SRVMAXDATA(nfsd); 2593 if (siz > xfer) 2594 siz = xfer; 2595 fullsiz = siz; 2596 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 2597 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2598 if (!error && vp->v_type != VDIR) { 2599 error = ENOTDIR; 2600 vput(vp); 2601 } 2602 if (error) { 2603 nfsm_reply(NFSX_UNSIGNED); 2604 nfsm_srvpostop_attr(getret, &at); 2605 return (0); 2606 } 2607 nqsrv_getl(vp, ND_READ); 2608 if (v3) { 2609 error = getret = VOP_GETATTR(vp, &at, cred, lwp); 2610 #ifdef NFS3_STRICTVERF 2611 /* 2612 * XXX This check is too strict for Solaris 2.5 clients. 2613 */ 2614 if (!error && toff && verf != at.va_filerev) 2615 error = NFSERR_BAD_COOKIE; 2616 #endif 2617 } 2618 if (!error) 2619 error = nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 0); 2620 if (error) { 2621 vput(vp); 2622 nfsm_reply(NFSX_POSTOPATTR(v3)); 2623 nfsm_srvpostop_attr(getret, &at); 2624 return (0); 2625 } 2626 VOP_UNLOCK(vp, 0); 2627 rbuf = malloc(siz, M_TEMP, M_WAITOK); 2628 again: 2629 iv.iov_base = rbuf; 2630 iv.iov_len = fullsiz; 2631 io.uio_iov = &iv; 2632 io.uio_iovcnt = 1; 2633 io.uio_offset = (off_t)off; 2634 io.uio_resid = fullsiz; 2635 io.uio_rw = UIO_READ; 2636 UIO_SETUP_SYSSPACE(&io); 2637 eofflag = 0; 2638 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2639 2640 error = VOP_READDIR(vp, &io, cred, &eofflag, &cookies, &ncookies); 2641 2642 off = (off_t)io.uio_offset; 2643 if (!cookies && !error) 2644 error = NFSERR_PERM; 2645 if (v3) { 2646 getret = VOP_GETATTR(vp, &at, cred, lwp); 2647 if (!error) 2648 error = getret; 2649 } 2650 2651 VOP_UNLOCK(vp, 0); 2652 if (error) { 2653 vrele(vp); 2654 free((caddr_t)rbuf, M_TEMP); 2655 if (cookies) 2656 free((caddr_t)cookies, M_TEMP); 2657 nfsm_reply(NFSX_POSTOPATTR(v3)); 2658 nfsm_srvpostop_attr(getret, &at); 2659 return (0); 2660 } 2661 if (io.uio_resid) { 2662 siz -= io.uio_resid; 2663 2664 /* 2665 * If nothing read, return eof 2666 * rpc reply 2667 */ 2668 if (siz == 0) { 2669 vrele(vp); 2670 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_COOKIEVERF(v3) + 2671 2 * NFSX_UNSIGNED); 2672 if (v3) { 2673 nfsm_srvpostop_attr(getret, &at); 2674 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 2675 txdr_hyper(at.va_filerev, tl); 2676 tl += 2; 2677 } else 2678 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2679 *tl++ = nfs_false; 2680 *tl = nfs_true; 2681 free((caddr_t)rbuf, M_TEMP); 2682 free((caddr_t)cookies, M_TEMP); 2683 return (0); 2684 } 2685 } 2686 2687 /* 2688 * Check for degenerate cases of nothing useful read. 2689 * If so go try again 2690 */ 2691 cpos = rbuf; 2692 cend = rbuf + siz; 2693 dp = (struct dirent *)cpos; 2694 cookiep = cookies; 2695 2696 while (cpos < cend && ncookies > 0 && 2697 (dp->d_fileno == 0 || dp->d_type == DT_WHT)) { 2698 cpos += dp->d_reclen; 2699 dp = (struct dirent *)cpos; 2700 cookiep++; 2701 ncookies--; 2702 } 2703 if (cpos >= cend || ncookies == 0) { 2704 toff = off; 2705 siz = fullsiz; 2706 free(cookies, M_TEMP); 2707 goto again; 2708 } 2709 2710 len = 3 * NFSX_UNSIGNED; /* paranoia, probably can be 0 */ 2711 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_COOKIEVERF(v3) + siz); 2712 if (v3) { 2713 nfsm_srvpostop_attr(getret, &at); 2714 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2715 txdr_hyper(at.va_filerev, tl); 2716 } 2717 mp = mp2 = mb; 2718 bp = bpos; 2719 be = bp + M_TRAILINGSPACE(mp); 2720 2721 /* Loop through the records and build reply */ 2722 while (cpos < cend && ncookies > 0) { 2723 if (dp->d_fileno != 0 && dp->d_type != DT_WHT) { 2724 nlen = dp->d_namlen; 2725 rem = nfsm_rndup(nlen)-nlen; 2726 len += (4 * NFSX_UNSIGNED + nlen + rem); 2727 if (v3) 2728 len += 2 * NFSX_UNSIGNED; 2729 if (len > cnt) { 2730 eofflag = 0; 2731 break; 2732 } 2733 /* 2734 * Build the directory record xdr from 2735 * the dirent entry. 2736 */ 2737 nfsm_clget; 2738 *tl = nfs_true; 2739 bp += NFSX_UNSIGNED; 2740 if (v3) { 2741 nfsm_clget; 2742 *tl = txdr_unsigned(dp->d_fileno >> 32); 2743 bp += NFSX_UNSIGNED; 2744 } 2745 nfsm_clget; 2746 *tl = txdr_unsigned(dp->d_fileno); 2747 bp += NFSX_UNSIGNED; 2748 nfsm_clget; 2749 *tl = txdr_unsigned(nlen); 2750 bp += NFSX_UNSIGNED; 2751 2752 /* And loop around copying the name */ 2753 xfer = nlen; 2754 cp = dp->d_name; 2755 while (xfer > 0) { 2756 nfsm_clget; 2757 if ((bp+xfer) > be) 2758 tsiz = be-bp; 2759 else 2760 tsiz = xfer; 2761 memcpy(bp, cp, tsiz); 2762 bp += tsiz; 2763 xfer -= tsiz; 2764 if (xfer > 0) 2765 cp += tsiz; 2766 } 2767 /* And null pad to an int32_t boundary */ 2768 for (i = 0; i < rem; i++) 2769 *bp++ = '\0'; 2770 nfsm_clget; 2771 2772 /* Finish off the record */ 2773 txdr_hyper(*cookiep, &jar); 2774 if (v3) { 2775 *tl = jar.nfsuquad[0]; 2776 bp += NFSX_UNSIGNED; 2777 nfsm_clget; 2778 } 2779 *tl = jar.nfsuquad[1]; 2780 bp += NFSX_UNSIGNED; 2781 } 2782 cpos += dp->d_reclen; 2783 dp = (struct dirent *)cpos; 2784 cookiep++; 2785 ncookies--; 2786 } 2787 vrele(vp); 2788 nfsm_clget; 2789 *tl = nfs_false; 2790 bp += NFSX_UNSIGNED; 2791 nfsm_clget; 2792 if (eofflag) 2793 *tl = nfs_true; 2794 else 2795 *tl = nfs_false; 2796 bp += NFSX_UNSIGNED; 2797 if (mp != mb) { 2798 if (bp < be) 2799 mp->m_len = bp - mtod(mp, caddr_t); 2800 } else 2801 mp->m_len += bp - bpos; 2802 free((caddr_t)rbuf, M_TEMP); 2803 free((caddr_t)cookies, M_TEMP); 2804 nfsm_srvdone; 2805 } 2806 2807 int 2808 nfsrv_readdirplus(nfsd, slp, lwp, mrq) 2809 struct nfsrv_descript *nfsd; 2810 struct nfssvc_sock *slp; 2811 struct lwp *lwp; 2812 struct mbuf **mrq; 2813 { 2814 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2815 struct mbuf *nam = nfsd->nd_nam; 2816 caddr_t dpos = nfsd->nd_dpos; 2817 kauth_cred_t cred = nfsd->nd_cr; 2818 char *bp, *be; 2819 struct mbuf *mp; 2820 struct dirent *dp; 2821 caddr_t cp; 2822 u_int32_t *tl; 2823 int32_t t1; 2824 caddr_t bpos; 2825 struct mbuf *mb, *mreq, *mp2; 2826 char *cpos, *cend, *cp2, *rbuf; 2827 struct vnode *vp, *nvp; 2828 struct flrep fl; 2829 nfsrvfh_t nsfh; 2830 struct uio io; 2831 struct iovec iv; 2832 struct vattr va, at, *vap = &va; 2833 struct nfs_fattr *fp; 2834 int len, nlen, rem, xfer, tsiz, i, error = 0, getret = 1; 2835 int siz, cnt, fullsiz, eofflag, rdonly, cache = 0, dirlen, ncookies; 2836 u_quad_t frev, off, toff, verf; 2837 off_t *cookies = NULL, *cookiep; 2838 2839 nfsm_srvmtofh(&nsfh); 2840 nfsm_dissect(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 2841 toff = fxdr_hyper(tl); 2842 tl += 2; 2843 verf = fxdr_hyper(tl); 2844 tl += 2; 2845 siz = fxdr_unsigned(int, *tl++); 2846 cnt = fxdr_unsigned(int, *tl); 2847 off = toff; 2848 siz = ((siz + NFS_SRVDIRBLKSIZ - 1) & ~(NFS_SRVDIRBLKSIZ - 1)); 2849 xfer = NFS_SRVMAXDATA(nfsd); 2850 if (siz > xfer) 2851 siz = xfer; 2852 fullsiz = siz; 2853 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 2854 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2855 if (!error && vp->v_type != VDIR) { 2856 error = ENOTDIR; 2857 vput(vp); 2858 } 2859 if (error) { 2860 nfsm_reply(NFSX_UNSIGNED); 2861 nfsm_srvpostop_attr(getret, &at); 2862 return (0); 2863 } 2864 error = getret = VOP_GETATTR(vp, &at, cred, lwp); 2865 #ifdef NFS3_STRICTVERF 2866 /* 2867 * XXX This check is too strict for Solaris 2.5 clients. 2868 */ 2869 if (!error && toff && verf != at.va_filerev) 2870 error = NFSERR_BAD_COOKIE; 2871 #endif 2872 if (!error) { 2873 nqsrv_getl(vp, ND_READ); 2874 error = nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 0); 2875 } 2876 if (error) { 2877 vput(vp); 2878 nfsm_reply(NFSX_V3POSTOPATTR); 2879 nfsm_srvpostop_attr(getret, &at); 2880 return (0); 2881 } 2882 VOP_UNLOCK(vp, 0); 2883 2884 rbuf = malloc(siz, M_TEMP, M_WAITOK); 2885 again: 2886 iv.iov_base = rbuf; 2887 iv.iov_len = fullsiz; 2888 io.uio_iov = &iv; 2889 io.uio_iovcnt = 1; 2890 io.uio_offset = (off_t)off; 2891 io.uio_resid = fullsiz; 2892 io.uio_rw = UIO_READ; 2893 UIO_SETUP_SYSSPACE(&io); 2894 eofflag = 0; 2895 2896 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2897 2898 error = VOP_READDIR(vp, &io, cred, &eofflag, &cookies, &ncookies); 2899 2900 off = (u_quad_t)io.uio_offset; 2901 getret = VOP_GETATTR(vp, &at, cred, lwp); 2902 2903 VOP_UNLOCK(vp, 0); 2904 2905 /* 2906 * If the VGET operation doesn't work for this filesystem, 2907 * we can't support readdirplus. Returning NOTSUPP should 2908 * make clients fall back to plain readdir. 2909 * There's no need to check for VPTOFH as well, we wouldn't 2910 * even be here otherwise. 2911 */ 2912 if (!getret) { 2913 if ((getret = VFS_VGET(vp->v_mount, at.va_fileid, &nvp))) 2914 getret = (getret == EOPNOTSUPP) ? 2915 NFSERR_NOTSUPP : NFSERR_IO; 2916 else 2917 vput(nvp); 2918 } 2919 2920 if (!cookies && !error) 2921 error = NFSERR_PERM; 2922 if (!error) 2923 error = getret; 2924 if (error) { 2925 vrele(vp); 2926 if (cookies) 2927 free((caddr_t)cookies, M_TEMP); 2928 free((caddr_t)rbuf, M_TEMP); 2929 nfsm_reply(NFSX_V3POSTOPATTR); 2930 nfsm_srvpostop_attr(getret, &at); 2931 return (0); 2932 } 2933 if (io.uio_resid) { 2934 siz -= io.uio_resid; 2935 2936 /* 2937 * If nothing read, return eof 2938 * rpc reply 2939 */ 2940 if (siz == 0) { 2941 vrele(vp); 2942 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF + 2943 2 * NFSX_UNSIGNED); 2944 nfsm_srvpostop_attr(getret, &at); 2945 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 2946 txdr_hyper(at.va_filerev, tl); 2947 tl += 2; 2948 *tl++ = nfs_false; 2949 *tl = nfs_true; 2950 free((caddr_t)cookies, M_TEMP); 2951 free((caddr_t)rbuf, M_TEMP); 2952 return (0); 2953 } 2954 } 2955 2956 /* 2957 * Check for degenerate cases of nothing useful read. 2958 * If so go try again 2959 */ 2960 cpos = rbuf; 2961 cend = rbuf + siz; 2962 dp = (struct dirent *)cpos; 2963 cookiep = cookies; 2964 2965 while (cpos < cend && ncookies > 0 && 2966 (dp->d_fileno == 0 || dp->d_type == DT_WHT)) { 2967 cpos += dp->d_reclen; 2968 dp = (struct dirent *)cpos; 2969 cookiep++; 2970 ncookies--; 2971 } 2972 if (cpos >= cend || ncookies == 0) { 2973 toff = off; 2974 siz = fullsiz; 2975 free(cookies, M_TEMP); 2976 goto again; 2977 } 2978 2979 dirlen = len = NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF + 2 * NFSX_UNSIGNED; 2980 nfsm_reply(cnt); 2981 nfsm_srvpostop_attr(getret, &at); 2982 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2983 txdr_hyper(at.va_filerev, tl); 2984 mp = mp2 = mb; 2985 bp = bpos; 2986 be = bp + M_TRAILINGSPACE(mp); 2987 2988 /* Loop through the records and build reply */ 2989 while (cpos < cend && ncookies > 0) { 2990 if (dp->d_fileno != 0 && dp->d_type != DT_WHT) { 2991 nfsrvfh_t nnsfh; 2992 2993 nlen = dp->d_namlen; 2994 rem = nfsm_rndup(nlen)-nlen; 2995 2996 /* 2997 * For readdir_and_lookup get the vnode using 2998 * the file number. 2999 */ 3000 if (VFS_VGET(vp->v_mount, dp->d_fileno, &nvp)) 3001 goto invalid; 3002 if (nfsrv_composefh(nvp, &nnsfh, TRUE)) { 3003 vput(nvp); 3004 goto invalid; 3005 } 3006 if (VOP_GETATTR(nvp, vap, cred, lwp)) { 3007 vput(nvp); 3008 goto invalid; 3009 } 3010 vput(nvp); 3011 3012 /* 3013 * If either the dircount or maxcount will be 3014 * exceeded, get out now. Both of these lengths 3015 * are calculated conservatively, including all 3016 * XDR overheads. 3017 */ 3018 len += (8 * NFSX_UNSIGNED + nlen + rem + NFSX_V3FH + 3019 NFSX_V3POSTOPATTR); 3020 dirlen += (6 * NFSX_UNSIGNED + nlen + rem); 3021 if (len > cnt || dirlen > fullsiz) { 3022 eofflag = 0; 3023 break; 3024 } 3025 3026 /* 3027 * Build the directory record xdr from 3028 * the dirent entry. 3029 */ 3030 fp = (struct nfs_fattr *)&fl.fl_fattr; 3031 nfsm_srvfillattr(vap, fp); 3032 fl.fl_fhsize = txdr_unsigned(NFSX_V3FH); 3033 fl.fl_fhok = nfs_true; 3034 fl.fl_postopok = nfs_true; 3035 txdr_hyper(*cookiep, fl.fl_off.nfsuquad); 3036 3037 nfsm_clget; 3038 *tl = nfs_true; 3039 bp += NFSX_UNSIGNED; 3040 nfsm_clget; 3041 *tl = txdr_unsigned(dp->d_fileno >> 32); 3042 bp += NFSX_UNSIGNED; 3043 nfsm_clget; 3044 *tl = txdr_unsigned(dp->d_fileno); 3045 bp += NFSX_UNSIGNED; 3046 nfsm_clget; 3047 *tl = txdr_unsigned(nlen); 3048 bp += NFSX_UNSIGNED; 3049 3050 /* And loop around copying the name */ 3051 xfer = nlen; 3052 cp = dp->d_name; 3053 while (xfer > 0) { 3054 nfsm_clget; 3055 if ((bp + xfer) > be) 3056 tsiz = be - bp; 3057 else 3058 tsiz = xfer; 3059 memcpy(bp, cp, tsiz); 3060 bp += tsiz; 3061 xfer -= tsiz; 3062 if (xfer > 0) 3063 cp += tsiz; 3064 } 3065 /* And null pad to an int32_t boundary */ 3066 for (i = 0; i < rem; i++) 3067 *bp++ = '\0'; 3068 3069 /* 3070 * Now copy the flrep structure out. 3071 */ 3072 xfer = sizeof(struct flrep); 3073 cp = (caddr_t)&fl; 3074 while (xfer > 0) { 3075 nfsm_clget; 3076 if ((bp + xfer) > be) 3077 tsiz = be - bp; 3078 else 3079 tsiz = xfer; 3080 memcpy(bp, cp, tsiz); 3081 bp += tsiz; 3082 xfer -= tsiz; 3083 if (xfer > 0) 3084 cp += tsiz; 3085 } 3086 3087 /* 3088 * ... and filehandle. 3089 */ 3090 xfer = NFSRVFH_SIZE(&nnsfh); 3091 cp = NFSRVFH_DATA(&nnsfh); 3092 while (xfer > 0) { 3093 nfsm_clget; 3094 if ((bp + xfer) > be) 3095 tsiz = be - bp; 3096 else 3097 tsiz = xfer; 3098 memcpy(bp, cp, tsiz); 3099 bp += tsiz; 3100 xfer -= tsiz; 3101 if (xfer > 0) 3102 cp += tsiz; 3103 } 3104 } 3105 invalid: 3106 cpos += dp->d_reclen; 3107 dp = (struct dirent *)cpos; 3108 cookiep++; 3109 ncookies--; 3110 } 3111 vrele(vp); 3112 nfsm_clget; 3113 *tl = nfs_false; 3114 bp += NFSX_UNSIGNED; 3115 nfsm_clget; 3116 if (eofflag) 3117 *tl = nfs_true; 3118 else 3119 *tl = nfs_false; 3120 bp += NFSX_UNSIGNED; 3121 if (mp != mb) { 3122 if (bp < be) 3123 mp->m_len = bp - mtod(mp, caddr_t); 3124 } else 3125 mp->m_len += bp - bpos; 3126 free((caddr_t)cookies, M_TEMP); 3127 free((caddr_t)rbuf, M_TEMP); 3128 nfsm_srvdone; 3129 } 3130 3131 /* 3132 * nfs commit service 3133 */ 3134 int 3135 nfsrv_commit(nfsd, slp, lwp, mrq) 3136 struct nfsrv_descript *nfsd; 3137 struct nfssvc_sock *slp; 3138 struct lwp *lwp; 3139 struct mbuf **mrq; 3140 { 3141 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3142 struct mbuf *nam = nfsd->nd_nam; 3143 caddr_t dpos = nfsd->nd_dpos; 3144 kauth_cred_t cred = nfsd->nd_cr; 3145 struct vattr bfor, aft; 3146 struct vnode *vp; 3147 nfsrvfh_t nsfh; 3148 u_int32_t *tl; 3149 int32_t t1; 3150 caddr_t bpos; 3151 int error = 0, rdonly, for_ret = 1, aft_ret = 1, cache = 0; 3152 uint32_t cnt; 3153 char *cp2; 3154 struct mbuf *mb, *mreq; 3155 u_quad_t frev, off, end; 3156 struct mount *mp = NULL; 3157 3158 nfsm_srvmtofh(&nsfh); 3159 if ((mp = vfs_getvfs(&NFSRVFH_FHANDLE(&nsfh)->fh_fsid)) == NULL) 3160 return (ESTALE); 3161 vn_start_write(NULL, &mp, V_WAIT); 3162 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 3163 3164 off = fxdr_hyper(tl); 3165 tl += 2; 3166 cnt = fxdr_unsigned(uint32_t, *tl); 3167 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 3168 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 3169 if (error) { 3170 nfsm_reply(2 * NFSX_UNSIGNED); 3171 nfsm_srvwcc_data(for_ret, &bfor, aft_ret, &aft); 3172 vn_finished_write(mp, 0); 3173 return (0); 3174 } 3175 for_ret = VOP_GETATTR(vp, &bfor, cred, lwp); 3176 end = (cnt > 0) ? off + cnt : vp->v_size; 3177 if (end < off || end > vp->v_size) 3178 end = vp->v_size; 3179 if (off < vp->v_size) 3180 error = VOP_FSYNC(vp, cred, FSYNC_WAIT, off, end, lwp); 3181 /* else error == 0, from nfsrv_fhtovp() */ 3182 aft_ret = VOP_GETATTR(vp, &aft, cred, lwp); 3183 vput(vp); 3184 nfsm_reply(NFSX_V3WCCDATA + NFSX_V3WRITEVERF); 3185 nfsm_srvwcc_data(for_ret, &bfor, aft_ret, &aft); 3186 if (!error) { 3187 nfsm_build(tl, u_int32_t *, NFSX_V3WRITEVERF); 3188 *tl++ = txdr_unsigned(boottime.tv_sec); 3189 *tl = txdr_unsigned(boottime.tv_usec); 3190 } else { 3191 vn_finished_write(mp, 0); 3192 return (0); 3193 } 3194 vn_finished_write(mp, 0); 3195 nfsm_srvdone; 3196 } 3197 3198 /* 3199 * nfs statfs service 3200 */ 3201 int 3202 nfsrv_statfs(nfsd, slp, lwp, mrq) 3203 struct nfsrv_descript *nfsd; 3204 struct nfssvc_sock *slp; 3205 struct lwp *lwp; 3206 struct mbuf **mrq; 3207 { 3208 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3209 struct mbuf *nam = nfsd->nd_nam; 3210 caddr_t dpos = nfsd->nd_dpos; 3211 kauth_cred_t cred = nfsd->nd_cr; 3212 struct statvfs *sf = NULL; 3213 struct nfs_statfs *sfp; 3214 u_int32_t *tl; 3215 int32_t t1; 3216 caddr_t bpos; 3217 int error = 0, rdonly, cache = 0, getret = 1; 3218 int v3 = (nfsd->nd_flag & ND_NFSV3); 3219 char *cp2; 3220 struct mbuf *mb, *mreq; 3221 struct vnode *vp; 3222 struct vattr at; 3223 nfsrvfh_t nsfh; 3224 u_quad_t frev, tval; 3225 3226 nfsm_srvmtofh(&nsfh); 3227 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 3228 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 3229 if (error) { 3230 nfsm_reply(NFSX_UNSIGNED); 3231 nfsm_srvpostop_attr(getret, &at); 3232 return (0); 3233 } 3234 sf = malloc(sizeof(*sf), M_TEMP, M_WAITOK); 3235 error = VFS_STATVFS(vp->v_mount, sf, lwp); 3236 getret = VOP_GETATTR(vp, &at, cred, lwp); 3237 vput(vp); 3238 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_STATFS(v3)); 3239 if (v3) 3240 nfsm_srvpostop_attr(getret, &at); 3241 if (error) { 3242 free(sf, M_TEMP); 3243 return (0); 3244 } 3245 nfsm_build(sfp, struct nfs_statfs *, NFSX_STATFS(v3)); 3246 if (v3) { 3247 tval = (u_quad_t)((quad_t)sf->f_blocks * (quad_t)sf->f_frsize); 3248 txdr_hyper(tval, &sfp->sf_tbytes); 3249 tval = (u_quad_t)((quad_t)sf->f_bfree * (quad_t)sf->f_frsize); 3250 txdr_hyper(tval, &sfp->sf_fbytes); 3251 tval = (u_quad_t)((quad_t)sf->f_bavail * (quad_t)sf->f_frsize); 3252 txdr_hyper(tval, &sfp->sf_abytes); 3253 tval = (u_quad_t)sf->f_files; 3254 txdr_hyper(tval, &sfp->sf_tfiles); 3255 tval = (u_quad_t)sf->f_ffree; 3256 txdr_hyper(tval, &sfp->sf_ffiles); 3257 txdr_hyper(tval, &sfp->sf_afiles); 3258 sfp->sf_invarsec = 0; 3259 } else { 3260 sfp->sf_tsize = txdr_unsigned(NFS_MAXDGRAMDATA); 3261 sfp->sf_bsize = txdr_unsigned(sf->f_frsize); 3262 sfp->sf_blocks = txdr_unsigned(sf->f_blocks); 3263 sfp->sf_bfree = txdr_unsigned(sf->f_bfree); 3264 sfp->sf_bavail = txdr_unsigned(sf->f_bavail); 3265 } 3266 nfsmout: 3267 if (sf) 3268 free(sf, M_TEMP); 3269 return error; 3270 } 3271 3272 /* 3273 * nfs fsinfo service 3274 */ 3275 int 3276 nfsrv_fsinfo(nfsd, slp, lwp, mrq) 3277 struct nfsrv_descript *nfsd; 3278 struct nfssvc_sock *slp; 3279 struct lwp *lwp; 3280 struct mbuf **mrq; 3281 { 3282 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3283 struct mbuf *nam = nfsd->nd_nam; 3284 caddr_t dpos = nfsd->nd_dpos; 3285 kauth_cred_t cred = nfsd->nd_cr; 3286 u_int32_t *tl; 3287 struct nfsv3_fsinfo *sip; 3288 int32_t t1; 3289 caddr_t bpos; 3290 int error = 0, rdonly, cache = 0, getret = 1; 3291 uint32_t maxdata; 3292 char *cp2; 3293 struct mbuf *mb, *mreq; 3294 struct vnode *vp; 3295 struct vattr at; 3296 nfsrvfh_t nsfh; 3297 u_quad_t frev, maxfsize; 3298 struct statvfs *sb; 3299 3300 nfsm_srvmtofh(&nsfh); 3301 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 3302 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 3303 if (error) { 3304 nfsm_reply(NFSX_UNSIGNED); 3305 nfsm_srvpostop_attr(getret, &at); 3306 return (0); 3307 } 3308 3309 /* XXX Try to make a guess on the max file size. */ 3310 sb = malloc(sizeof(*sb), M_TEMP, M_WAITOK); 3311 VFS_STATVFS(vp->v_mount, sb, (struct lwp *)0); 3312 maxfsize = (u_quad_t)0x80000000 * sb->f_frsize - 1; 3313 free(sb, M_TEMP); 3314 3315 getret = VOP_GETATTR(vp, &at, cred, lwp); 3316 vput(vp); 3317 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3FSINFO); 3318 nfsm_srvpostop_attr(getret, &at); 3319 nfsm_build(sip, struct nfsv3_fsinfo *, NFSX_V3FSINFO); 3320 3321 /* 3322 * XXX 3323 * There should be file system VFS OP(s) to get this information. 3324 * For now, assume ufs. 3325 */ 3326 if (slp->ns_so->so_type == SOCK_DGRAM) 3327 maxdata = NFS_MAXDGRAMDATA; 3328 else 3329 maxdata = NFS_MAXDATA; 3330 sip->fs_rtmax = txdr_unsigned(maxdata); 3331 sip->fs_rtpref = txdr_unsigned(maxdata); 3332 sip->fs_rtmult = txdr_unsigned(NFS_FABLKSIZE); 3333 sip->fs_wtmax = txdr_unsigned(maxdata); 3334 sip->fs_wtpref = txdr_unsigned(maxdata); 3335 sip->fs_wtmult = txdr_unsigned(NFS_FABLKSIZE); 3336 sip->fs_dtpref = txdr_unsigned(maxdata); 3337 txdr_hyper(maxfsize, &sip->fs_maxfilesize); 3338 sip->fs_timedelta.nfsv3_sec = 0; 3339 sip->fs_timedelta.nfsv3_nsec = txdr_unsigned(1); 3340 sip->fs_properties = txdr_unsigned(NFSV3FSINFO_LINK | 3341 NFSV3FSINFO_SYMLINK | NFSV3FSINFO_HOMOGENEOUS | 3342 NFSV3FSINFO_CANSETTIME); 3343 nfsm_srvdone; 3344 } 3345 3346 /* 3347 * nfs pathconf service 3348 */ 3349 int 3350 nfsrv_pathconf(nfsd, slp, lwp, mrq) 3351 struct nfsrv_descript *nfsd; 3352 struct nfssvc_sock *slp; 3353 struct lwp *lwp; 3354 struct mbuf **mrq; 3355 { 3356 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3357 struct mbuf *nam = nfsd->nd_nam; 3358 caddr_t dpos = nfsd->nd_dpos; 3359 kauth_cred_t cred = nfsd->nd_cr; 3360 u_int32_t *tl; 3361 struct nfsv3_pathconf *pc; 3362 int32_t t1; 3363 caddr_t bpos; 3364 int error = 0, rdonly, cache = 0, getret = 1; 3365 register_t linkmax, namemax, chownres, notrunc; 3366 char *cp2; 3367 struct mbuf *mb, *mreq; 3368 struct vnode *vp; 3369 struct vattr at; 3370 nfsrvfh_t nsfh; 3371 u_quad_t frev; 3372 3373 nfsm_srvmtofh(&nsfh); 3374 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 3375 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 3376 if (error) { 3377 nfsm_reply(NFSX_UNSIGNED); 3378 nfsm_srvpostop_attr(getret, &at); 3379 return (0); 3380 } 3381 error = VOP_PATHCONF(vp, _PC_LINK_MAX, &linkmax); 3382 if (!error) 3383 error = VOP_PATHCONF(vp, _PC_NAME_MAX, &namemax); 3384 if (!error) 3385 error = VOP_PATHCONF(vp, _PC_CHOWN_RESTRICTED, &chownres); 3386 if (!error) 3387 error = VOP_PATHCONF(vp, _PC_NO_TRUNC, ¬runc); 3388 getret = VOP_GETATTR(vp, &at, cred, lwp); 3389 vput(vp); 3390 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3PATHCONF); 3391 nfsm_srvpostop_attr(getret, &at); 3392 if (error) 3393 return (0); 3394 nfsm_build(pc, struct nfsv3_pathconf *, NFSX_V3PATHCONF); 3395 3396 pc->pc_linkmax = txdr_unsigned(linkmax); 3397 pc->pc_namemax = txdr_unsigned(namemax); 3398 pc->pc_notrunc = txdr_unsigned(notrunc); 3399 pc->pc_chownrestricted = txdr_unsigned(chownres); 3400 3401 /* 3402 * These should probably be supported by VOP_PATHCONF(), but 3403 * until msdosfs is exportable (why would you want to?), the 3404 * Unix defaults should be ok. 3405 */ 3406 pc->pc_caseinsensitive = nfs_false; 3407 pc->pc_casepreserving = nfs_true; 3408 nfsm_srvdone; 3409 } 3410 3411 /* 3412 * Null operation, used by clients to ping server 3413 */ 3414 /* ARGSUSED */ 3415 int 3416 nfsrv_null(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, 3417 struct lwp *lwp, struct mbuf **mrq) 3418 { 3419 struct mbuf *mrep = nfsd->nd_mrep; 3420 caddr_t bpos; 3421 int error = NFSERR_RETVOID, cache = 0; 3422 struct mbuf *mb, *mreq; 3423 u_quad_t frev; 3424 3425 nfsm_reply(0); 3426 return (0); 3427 } 3428 3429 /* 3430 * No operation, used for obsolete procedures 3431 */ 3432 /* ARGSUSED */ 3433 int 3434 nfsrv_noop(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, 3435 struct lwp *lwp, struct mbuf **mrq) 3436 { 3437 struct mbuf *mrep = nfsd->nd_mrep; 3438 caddr_t bpos; 3439 int error, cache = 0; 3440 struct mbuf *mb, *mreq; 3441 u_quad_t frev; 3442 3443 if (nfsd->nd_repstat) 3444 error = nfsd->nd_repstat; 3445 else 3446 error = EPROCUNAVAIL; 3447 nfsm_reply(0); 3448 return (0); 3449 } 3450 3451 /* 3452 * Perform access checking for vnodes obtained from file handles that would 3453 * refer to files already opened by a Unix client. You cannot just use 3454 * vn_writechk() and VOP_ACCESS() for two reasons. 3455 * 1 - You must check for exported rdonly as well as MNT_RDONLY for the write case 3456 * 2 - The owner is to be given access irrespective of mode bits for some 3457 * operations, so that processes that chmod after opening a file don't 3458 * break. I don't like this because it opens a security hole, but since 3459 * the nfs server opens a security hole the size of a barn door anyhow, 3460 * what the heck. 3461 * 3462 * The exception to rule 2 is EPERM. If a file is IMMUTABLE, VOP_ACCESS() 3463 * will return EPERM instead of EACCESS. EPERM is always an error. 3464 */ 3465 int 3466 nfsrv_access(vp, flags, cred, rdonly, lwp, override) 3467 struct vnode *vp; 3468 int flags; 3469 kauth_cred_t cred; 3470 int rdonly; 3471 struct lwp *lwp; 3472 int override; 3473 { 3474 struct vattr vattr; 3475 int error; 3476 if (flags & VWRITE) { 3477 /* Just vn_writechk() changed to check rdonly */ 3478 /* 3479 * Disallow write attempts on read-only file systems; 3480 * unless the file is a socket or a block or character 3481 * device resident on the file system. 3482 */ 3483 if (rdonly || (vp->v_mount->mnt_flag & MNT_RDONLY)) { 3484 switch (vp->v_type) { 3485 case VREG: 3486 case VDIR: 3487 case VLNK: 3488 return (EROFS); 3489 default: 3490 break; 3491 } 3492 } 3493 3494 /* 3495 * If the vnode is in use as a process's text, 3496 * we can't allow writing. 3497 */ 3498 if (vp->v_flag & VTEXT) 3499 return (ETXTBSY); 3500 } 3501 error = VOP_GETATTR(vp, &vattr, cred, lwp); 3502 if (error) 3503 return (error); 3504 error = VOP_ACCESS(vp, flags, cred, lwp); 3505 /* 3506 * Allow certain operations for the owner (reads and writes 3507 * on files that are already open). 3508 */ 3509 if (override && error == EACCES && kauth_cred_geteuid(cred) == vattr.va_uid) 3510 error = 0; 3511 return error; 3512 } 3513
Indexes created Wed Sep 24 14:09:57 GMT 2025