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sys/nfs/nfs_serv.c
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1 /* $NetBSD: nfs_serv.c,v 1.94 2005/02/26 22:39:50 perry 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 1.94 2005/02/26 22:39:50 perry 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 <ufs/ufs/dir.h> 74 75 #include <uvm/uvm.h> 76 77 #include <nfs/nfsproto.h> 78 #include <nfs/rpcv2.h> 79 #include <nfs/nfs.h> 80 #include <nfs/xdr_subs.h> 81 #include <nfs/nfsm_subs.h> 82 #include <nfs/nqnfs.h> 83 #include <nfs/nfs_var.h> 84 85 /* Global vars */ 86 extern u_int32_t nfs_xdrneg1; 87 extern u_int32_t nfs_false, nfs_true; 88 extern enum vtype nv3tov_type[8]; 89 extern struct nfsstats nfsstats; 90 extern const nfstype nfsv2_type[9]; 91 extern const nfstype nfsv3_type[9]; 92 int nfsrvw_procrastinate = NFS_GATHERDELAY * 1000; 93 int nfsd_use_loan = 1; /* use page-loan for READ OP */ 94 95 /* 96 * nfs v3 access service 97 */ 98 int 99 nfsrv3_access(nfsd, slp, procp, mrq) 100 struct nfsrv_descript *nfsd; 101 struct nfssvc_sock *slp; 102 struct proc *procp; 103 struct mbuf **mrq; 104 { 105 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 106 struct mbuf *nam = nfsd->nd_nam; 107 caddr_t dpos = nfsd->nd_dpos; 108 struct ucred *cred = &nfsd->nd_cr; 109 struct vnode *vp; 110 nfsfh_t nfh; 111 fhandle_t *fhp; 112 u_int32_t *tl; 113 int32_t t1; 114 caddr_t bpos; 115 int error = 0, rdonly, cache = 0, getret; 116 char *cp2; 117 struct mbuf *mb, *mreq; 118 struct vattr va; 119 u_long inmode, testmode, outmode; 120 u_quad_t frev; 121 122 fhp = &nfh.fh_generic; 123 nfsm_srvmtofh(fhp); 124 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 125 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, &rdonly, 126 (nfsd->nd_flag & ND_KERBAUTH), FALSE); 127 if (error) { 128 nfsm_reply(NFSX_UNSIGNED); 129 nfsm_srvpostop_attr(1, (struct vattr *)0); 130 return (0); 131 } 132 inmode = fxdr_unsigned(u_int32_t, *tl); 133 outmode = 0; 134 if ((inmode & NFSV3ACCESS_READ) && 135 nfsrv_access(vp, VREAD, cred, rdonly, procp, 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, procp, 0) == 0) 141 outmode |= testmode; 142 if ((inmode & NFSV3ACCESS_EXECUTE) && 143 nfsrv_access(vp, VEXEC, cred, rdonly, procp, 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, procp, 0) == 0) 150 outmode |= testmode; 151 if ((inmode & NFSV3ACCESS_LOOKUP) && 152 nfsrv_access(vp, VEXEC, cred, rdonly, procp, 0) == 0) 153 outmode |= NFSV3ACCESS_LOOKUP; 154 } 155 getret = VOP_GETATTR(vp, &va, cred, procp); 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, procp, mrq) 169 struct nfsrv_descript *nfsd; 170 struct nfssvc_sock *slp; 171 struct proc *procp; 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 struct ucred *cred = &nfsd->nd_cr; 178 struct nfs_fattr *fp; 179 struct vattr va; 180 struct vnode *vp; 181 nfsfh_t nfh; 182 fhandle_t *fhp; 183 u_int32_t *tl; 184 int32_t t1; 185 caddr_t bpos; 186 int error = 0, rdonly, cache; 187 char *cp2; 188 struct mbuf *mb, *mreq; 189 u_quad_t frev; 190 191 fhp = &nfh.fh_generic; 192 nfsm_srvmtofh(fhp); 193 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, &rdonly, 194 (nfsd->nd_flag & ND_KERBAUTH), FALSE); 195 if (error) { 196 nfsm_reply(0); 197 return (0); 198 } 199 nqsrv_getl(vp, ND_READ); 200 error = VOP_GETATTR(vp, &va, cred, procp); 201 vput(vp); 202 nfsm_reply(NFSX_FATTR(nfsd->nd_flag & ND_NFSV3)); 203 if (error) 204 return (0); 205 nfsm_build(fp, struct nfs_fattr *, NFSX_FATTR(nfsd->nd_flag & ND_NFSV3)); 206 nfsm_srvfillattr(&va, fp); 207 nfsm_srvdone; 208 } 209 210 /* 211 * nfs setattr service 212 */ 213 int 214 nfsrv_setattr(nfsd, slp, procp, mrq) 215 struct nfsrv_descript *nfsd; 216 struct nfssvc_sock *slp; 217 struct proc *procp; 218 struct mbuf **mrq; 219 { 220 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 221 struct mbuf *nam = nfsd->nd_nam; 222 caddr_t dpos = nfsd->nd_dpos; 223 struct ucred *cred = &nfsd->nd_cr; 224 struct vattr va, preat; 225 struct nfsv2_sattr *sp; 226 struct nfs_fattr *fp; 227 struct vnode *vp; 228 nfsfh_t nfh; 229 fhandle_t *fhp; 230 u_int32_t *tl; 231 int32_t t1; 232 caddr_t bpos; 233 int error = 0, rdonly, cache, preat_ret = 1, postat_ret = 1; 234 int v3 = (nfsd->nd_flag & ND_NFSV3), gcheck = 0; 235 char *cp2; 236 struct mbuf *mb, *mreq; 237 u_quad_t frev; 238 struct timespec guard; 239 struct mount *mp = NULL; 240 241 fhp = &nfh.fh_generic; 242 nfsm_srvmtofh(fhp); 243 if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) 244 return (ESTALE); 245 vn_start_write(NULL, &mp, V_WAIT); 246 VATTR_NULL(&va); 247 if (v3) { 248 nfsm_srvsattr(&va); 249 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 250 gcheck = fxdr_unsigned(int, *tl); 251 if (gcheck) { 252 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 253 fxdr_nfsv3time(tl, &guard); 254 } 255 } else { 256 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 257 /* 258 * Nah nah nah nah na nah 259 * There is a bug in the Sun client that puts 0xffff in the mode 260 * field of sattr when it should put in 0xffffffff. The u_short 261 * doesn't sign extend. 262 * --> check the low order 2 bytes for 0xffff 263 */ 264 if ((fxdr_unsigned(int, sp->sa_mode) & 0xffff) != 0xffff) 265 va.va_mode = nfstov_mode(sp->sa_mode); 266 if (sp->sa_uid != nfs_xdrneg1) 267 va.va_uid = fxdr_unsigned(uid_t, sp->sa_uid); 268 if (sp->sa_gid != nfs_xdrneg1) 269 va.va_gid = fxdr_unsigned(gid_t, sp->sa_gid); 270 if (sp->sa_size != nfs_xdrneg1) 271 va.va_size = fxdr_unsigned(u_quad_t, sp->sa_size); 272 if (sp->sa_atime.nfsv2_sec != nfs_xdrneg1) { 273 #ifdef notyet 274 fxdr_nfsv2time(&sp->sa_atime, &va.va_atime); 275 #else 276 va.va_atime.tv_sec = 277 fxdr_unsigned(u_int32_t,sp->sa_atime.nfsv2_sec); 278 va.va_atime.tv_nsec = 0; 279 #endif 280 } 281 if (sp->sa_mtime.nfsv2_sec != nfs_xdrneg1) 282 fxdr_nfsv2time(&sp->sa_mtime, &va.va_mtime); 283 284 } 285 286 /* 287 * Now that we have all the fields, lets do it. 288 */ 289 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, &rdonly, 290 (nfsd->nd_flag & ND_KERBAUTH), FALSE); 291 if (error) { 292 nfsm_reply(2 * NFSX_UNSIGNED); 293 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 294 vn_finished_write(mp, 0); 295 return (0); 296 } 297 nqsrv_getl(vp, ND_WRITE); 298 if (v3) { 299 error = preat_ret = VOP_GETATTR(vp, &preat, cred, procp); 300 if (!error && gcheck && 301 (preat.va_ctime.tv_sec != guard.tv_sec || 302 preat.va_ctime.tv_nsec != guard.tv_nsec)) 303 error = NFSERR_NOT_SYNC; 304 if (error) { 305 vput(vp); 306 nfsm_reply(NFSX_WCCDATA(v3)); 307 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 308 vn_finished_write(mp, 0); 309 return (0); 310 } 311 } 312 313 /* 314 * If the size is being changed write acces is required, otherwise 315 * just check for a read only file system. 316 */ 317 if (va.va_size == ((u_quad_t)((quad_t) -1))) { 318 if (rdonly || (vp->v_mount->mnt_flag & MNT_RDONLY)) { 319 error = EROFS; 320 goto out; 321 } 322 } else { 323 if (vp->v_type == VDIR) { 324 error = EISDIR; 325 goto out; 326 } else if ((error = nfsrv_access(vp, VWRITE, cred, rdonly, 327 procp, 0)) != 0) 328 goto out; 329 } 330 error = VOP_SETATTR(vp, &va, cred, procp); 331 postat_ret = VOP_GETATTR(vp, &va, cred, procp); 332 if (!error) 333 error = postat_ret; 334 out: 335 vput(vp); 336 vn_finished_write(mp, 0); 337 nfsm_reply(NFSX_WCCORFATTR(v3)); 338 if (v3) { 339 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 340 return (0); 341 } else { 342 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 343 nfsm_srvfillattr(&va, fp); 344 } 345 nfsm_srvdone; 346 } 347 348 /* 349 * nfs lookup rpc 350 */ 351 int 352 nfsrv_lookup(nfsd, slp, procp, mrq) 353 struct nfsrv_descript *nfsd; 354 struct nfssvc_sock *slp; 355 struct proc *procp; 356 struct mbuf **mrq; 357 { 358 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 359 struct mbuf *nam = nfsd->nd_nam; 360 caddr_t dpos = nfsd->nd_dpos; 361 struct ucred *cred = &nfsd->nd_cr; 362 struct nfs_fattr *fp; 363 struct nameidata nd, ind, *ndp = &nd; 364 struct vnode *vp, *dirp; 365 nfsfh_t nfh; 366 fhandle_t *fhp; 367 caddr_t cp; 368 u_int32_t *tl; 369 int32_t t1; 370 caddr_t bpos; 371 int error = 0, cache, dirattr_ret = 1; 372 uint32_t len; 373 int v3 = (nfsd->nd_flag & ND_NFSV3), pubflag; 374 char *cp2; 375 struct mbuf *mb, *mreq; 376 struct vattr va, dirattr; 377 u_quad_t frev; 378 379 fhp = &nfh.fh_generic; 380 nfsm_srvmtofh(fhp); 381 nfsm_srvnamesiz(len); 382 383 pubflag = nfs_ispublicfh(fhp); 384 385 nd.ni_cnd.cn_cred = cred; 386 nd.ni_cnd.cn_nameiop = LOOKUP; 387 nd.ni_cnd.cn_flags = LOCKLEAF | SAVESTART; 388 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 389 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), pubflag); 390 391 if (!error && pubflag) { 392 if (nd.ni_vp->v_type == VDIR && nfs_pub.np_index != NULL) { 393 /* 394 * Setup call to lookup() to see if we can find 395 * the index file. Arguably, this doesn't belong 396 * in a kernel.. Ugh. 397 */ 398 ind = nd; 399 VOP_UNLOCK(nd.ni_vp, 0); 400 ind.ni_pathlen = strlen(nfs_pub.np_index); 401 ind.ni_cnd.cn_nameptr = ind.ni_cnd.cn_pnbuf = 402 nfs_pub.np_index; 403 ind.ni_startdir = nd.ni_vp; 404 VREF(ind.ni_startdir); 405 error = lookup(&ind); 406 if (!error) { 407 /* 408 * Found an index file. Get rid of 409 * the old references. 410 */ 411 if (dirp) 412 vrele(dirp); 413 dirp = nd.ni_vp; 414 vrele(nd.ni_startdir); 415 ndp = &ind; 416 } else 417 error = 0; 418 } 419 /* 420 * If the public filehandle was used, check that this lookup 421 * didn't result in a filehandle outside the publicly exported 422 * filesystem. 423 */ 424 425 if (!error && ndp->ni_vp->v_mount != nfs_pub.np_mount) { 426 vput(nd.ni_vp); 427 error = EPERM; 428 } 429 } 430 431 if (dirp) { 432 if (v3) 433 dirattr_ret = VOP_GETATTR(dirp, &dirattr, cred, 434 procp); 435 vrele(dirp); 436 } 437 438 if (error) { 439 nfsm_reply(NFSX_POSTOPATTR(v3)); 440 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 441 return (0); 442 } 443 444 nqsrv_getl(ndp->ni_startdir, ND_READ); 445 vrele(ndp->ni_startdir); 446 PNBUF_PUT(nd.ni_cnd.cn_pnbuf); 447 vp = ndp->ni_vp; 448 memset((caddr_t)fhp, 0, sizeof(nfh)); 449 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsidx; 450 error = VFS_VPTOFH(vp, &fhp->fh_fid); 451 if (!error) 452 error = VOP_GETATTR(vp, &va, cred, procp); 453 vput(vp); 454 nfsm_reply(NFSX_SRVFH(v3) + NFSX_POSTOPORFATTR(v3) + NFSX_POSTOPATTR(v3)); 455 if (error) { 456 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 457 return (0); 458 } 459 nfsm_srvfhtom(fhp, v3); 460 if (v3) { 461 nfsm_srvpostop_attr(0, &va); 462 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 463 } else { 464 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 465 nfsm_srvfillattr(&va, fp); 466 } 467 nfsm_srvdone; 468 } 469 470 /* 471 * nfs readlink service 472 */ 473 int 474 nfsrv_readlink(nfsd, slp, procp, mrq) 475 struct nfsrv_descript *nfsd; 476 struct nfssvc_sock *slp; 477 struct proc *procp; 478 struct mbuf **mrq; 479 { 480 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 481 struct mbuf *nam = nfsd->nd_nam; 482 caddr_t dpos = nfsd->nd_dpos; 483 struct ucred *cred = &nfsd->nd_cr; 484 struct iovec iv[(NFS_MAXPATHLEN+MLEN-1)/MLEN]; 485 struct iovec *ivp = iv; 486 struct mbuf *mp; 487 u_int32_t *tl; 488 int32_t t1; 489 caddr_t bpos; 490 int error = 0, rdonly, cache, i, padlen, getret; 491 uint32_t len; 492 int v3 = (nfsd->nd_flag & ND_NFSV3); 493 char *cp2; 494 struct mbuf *mb, *mp2 = NULL, *mp3 = NULL, *mreq; 495 struct vnode *vp; 496 struct vattr attr; 497 nfsfh_t nfh; 498 fhandle_t *fhp; 499 struct uio io, *uiop = &io; 500 u_quad_t frev; 501 502 fhp = &nfh.fh_generic; 503 nfsm_srvmtofh(fhp); 504 len = 0; 505 i = 0; 506 while (len < NFS_MAXPATHLEN) { 507 mp = m_get(M_WAIT, MT_DATA); 508 MCLAIM(mp, &nfs_mowner); 509 m_clget(mp, M_WAIT); 510 mp->m_len = NFSMSIZ(mp); 511 if (len == 0) 512 mp3 = mp2 = mp; 513 else { 514 mp2->m_next = mp; 515 mp2 = mp; 516 } 517 if ((len+mp->m_len) > NFS_MAXPATHLEN) { 518 mp->m_len = NFS_MAXPATHLEN-len; 519 len = NFS_MAXPATHLEN; 520 } else 521 len += mp->m_len; 522 ivp->iov_base = mtod(mp, caddr_t); 523 ivp->iov_len = mp->m_len; 524 i++; 525 ivp++; 526 } 527 uiop->uio_iov = iv; 528 uiop->uio_iovcnt = i; 529 uiop->uio_offset = 0; 530 uiop->uio_resid = len; 531 uiop->uio_rw = UIO_READ; 532 uiop->uio_segflg = UIO_SYSSPACE; 533 uiop->uio_procp = NULL; 534 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 535 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 536 if (error) { 537 m_freem(mp3); 538 nfsm_reply(2 * NFSX_UNSIGNED); 539 nfsm_srvpostop_attr(1, (struct vattr *)0); 540 return (0); 541 } 542 if (vp->v_type != VLNK) { 543 if (v3) 544 error = EINVAL; 545 else 546 error = ENXIO; 547 goto out; 548 } 549 nqsrv_getl(vp, ND_READ); 550 error = VOP_READLINK(vp, uiop, cred); 551 out: 552 getret = VOP_GETATTR(vp, &attr, cred, procp); 553 vput(vp); 554 if (error) 555 m_freem(mp3); 556 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_UNSIGNED); 557 if (v3) { 558 nfsm_srvpostop_attr(getret, &attr); 559 if (error) 560 return (0); 561 } 562 len -= uiop->uio_resid; 563 padlen = nfsm_padlen(len); 564 if (uiop->uio_resid || padlen) 565 nfs_zeropad(mp3, uiop->uio_resid, padlen); 566 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 567 *tl = txdr_unsigned(len); 568 mb->m_next = mp3; 569 nfsm_srvdone; 570 } 571 572 /* 573 * nfs read service 574 */ 575 int 576 nfsrv_read(nfsd, slp, procp, mrq) 577 struct nfsrv_descript *nfsd; 578 struct nfssvc_sock *slp; 579 struct proc *procp; 580 struct mbuf **mrq; 581 { 582 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 583 struct mbuf *nam = nfsd->nd_nam; 584 caddr_t dpos = nfsd->nd_dpos; 585 struct ucred *cred = &nfsd->nd_cr; 586 struct mbuf *m; 587 struct nfs_fattr *fp; 588 u_int32_t *tl; 589 int32_t t1; 590 int i; 591 caddr_t bpos; 592 int error = 0, rdonly, cache, getret; 593 int v3 = (nfsd->nd_flag & ND_NFSV3); 594 uint32_t reqlen, len, cnt, left; 595 int padlen; 596 char *cp2; 597 struct mbuf *mb, *mreq; 598 struct vnode *vp; 599 nfsfh_t nfh; 600 fhandle_t *fhp; 601 struct uio io, *uiop = &io; 602 struct vattr va; 603 off_t off; 604 u_quad_t frev; 605 606 fhp = &nfh.fh_generic; 607 nfsm_srvmtofh(fhp); 608 if (v3) { 609 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 610 off = fxdr_hyper(tl); 611 } else { 612 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 613 off = (off_t)fxdr_unsigned(u_int32_t, *tl); 614 } 615 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 616 reqlen = fxdr_unsigned(uint32_t, *tl); 617 reqlen = MIN(reqlen, NFS_SRVMAXDATA(nfsd)); 618 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 619 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 620 if (error) { 621 nfsm_reply(2 * NFSX_UNSIGNED); 622 nfsm_srvpostop_attr(1, (struct vattr *)0); 623 return (0); 624 } 625 if (vp->v_type != VREG) { 626 if (v3) 627 error = EINVAL; 628 else 629 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 630 } 631 if (!error) { 632 nqsrv_getl(vp, ND_READ); 633 if ((error = nfsrv_access(vp, VREAD, cred, rdonly, procp, 1)) != 0) 634 error = nfsrv_access(vp, VEXEC, cred, rdonly, procp, 1); 635 } 636 getret = VOP_GETATTR(vp, &va, cred, procp); 637 if (!error) 638 error = getret; 639 if (error) { 640 vput(vp); 641 nfsm_reply(NFSX_POSTOPATTR(v3)); 642 nfsm_srvpostop_attr(getret, &va); 643 return (0); 644 } 645 if (off >= va.va_size) 646 cnt = 0; 647 else if ((off + reqlen) > va.va_size) 648 cnt = va.va_size - off; 649 else 650 cnt = reqlen; 651 nfsm_reply(NFSX_POSTOPORFATTR(v3) + 3 * NFSX_UNSIGNED+nfsm_rndup(cnt)); 652 if (v3) { 653 nfsm_build(tl, u_int32_t *, NFSX_V3FATTR + 4 * NFSX_UNSIGNED); 654 *tl++ = nfs_true; 655 fp = (struct nfs_fattr *)tl; 656 tl += (NFSX_V3FATTR / sizeof (u_int32_t)); 657 } else { 658 nfsm_build(tl, u_int32_t *, NFSX_V2FATTR + NFSX_UNSIGNED); 659 fp = (struct nfs_fattr *)tl; 660 tl += (NFSX_V2FATTR / sizeof (u_int32_t)); 661 } 662 len = left = cnt; 663 if (cnt > 0) { 664 if (nfsd_use_loan) { 665 struct vm_page **pgpp; 666 voff_t pgoff = trunc_page(off); 667 int npages; 668 vaddr_t lva; 669 670 npages = (round_page(off + cnt) - pgoff) >> PAGE_SHIFT; 671 KASSERT(npages <= M_EXT_MAXPAGES); /* XXX */ 672 673 /* allocate kva for mbuf data */ 674 lva = sokvaalloc(npages << PAGE_SHIFT, slp->ns_so); 675 if (lva == 0) { 676 /* fall back to VOP_READ */ 677 goto loan_fail; 678 } 679 680 /* allocate mbuf */ 681 m = m_get(M_WAIT, MT_DATA); 682 MCLAIM(m, &nfs_mowner); 683 pgpp = m->m_ext.ext_pgs; 684 685 /* loan pages */ 686 error = uvm_loanuobjpages(&vp->v_uobj, pgoff, npages, 687 pgpp); 688 if (error) { 689 sokvafree(lva, npages << PAGE_SHIFT); 690 m_free(m); 691 if (error == EBUSY) 692 goto loan_fail; 693 goto read_error; 694 } 695 696 /* associate kva to mbuf */ 697 MEXTADD(m, (void *)(lva + ((vaddr_t)off & PAGE_MASK)), 698 cnt, M_MBUF, soloanfree, slp->ns_so); 699 m->m_flags |= M_EXT_PAGES | M_EXT_ROMAP; 700 m->m_len = cnt; 701 702 /* map pages */ 703 for (i = 0; i < npages; i++) { 704 pmap_kenter_pa(lva, VM_PAGE_TO_PHYS(pgpp[i]), 705 VM_PROT_READ); 706 lva += PAGE_SIZE; 707 } 708 709 pmap_update(pmap_kernel()); 710 711 mb->m_next = m; 712 mb = m; 713 error = 0; 714 uiop->uio_resid = 0; 715 } else { 716 struct iovec *iv; 717 struct iovec *iv2; 718 struct mbuf *m2; 719 int siz; 720 loan_fail: 721 /* 722 * Generate the mbuf list with the uio_iov ref. to it. 723 */ 724 i = 0; 725 m = m2 = mb; 726 while (left > 0) { 727 siz = min(M_TRAILINGSPACE(m), left); 728 if (siz > 0) { 729 left -= siz; 730 i++; 731 } 732 if (left > 0) { 733 m = m_get(M_WAIT, MT_DATA); 734 MCLAIM(m, &nfs_mowner); 735 m_clget(m, M_WAIT); 736 m->m_len = 0; 737 m2->m_next = m; 738 m2 = m; 739 } 740 } 741 iv = malloc(i * sizeof(struct iovec), M_TEMP, M_WAITOK); 742 uiop->uio_iov = iv2 = iv; 743 m = mb; 744 left = cnt; 745 i = 0; 746 while (left > 0) { 747 if (m == NULL) 748 panic("nfsrv_read iov"); 749 siz = min(M_TRAILINGSPACE(m), left); 750 if (siz > 0) { 751 iv->iov_base = mtod(m, caddr_t) + 752 m->m_len; 753 iv->iov_len = siz; 754 m->m_len += siz; 755 left -= siz; 756 iv++; 757 i++; 758 } 759 m = m->m_next; 760 } 761 uiop->uio_iovcnt = i; 762 uiop->uio_offset = off; 763 uiop->uio_resid = cnt; 764 uiop->uio_rw = UIO_READ; 765 uiop->uio_segflg = UIO_SYSSPACE; 766 error = VOP_READ(vp, uiop, IO_NODELOCKED, cred); 767 free((caddr_t)iv2, M_TEMP); 768 } 769 read_error: 770 if (error || (getret = VOP_GETATTR(vp, &va, cred, procp)) != 0){ 771 if (!error) 772 error = getret; 773 m_freem(mreq); 774 vput(vp); 775 nfsm_reply(NFSX_POSTOPATTR(v3)); 776 nfsm_srvpostop_attr(getret, &va); 777 return (0); 778 } 779 } else { 780 uiop->uio_resid = 0; 781 } 782 vput(vp); 783 nfsm_srvfillattr(&va, fp); 784 len -= uiop->uio_resid; 785 padlen = nfsm_padlen(len); 786 if (uiop->uio_resid || padlen) 787 nfs_zeropad(mb, uiop->uio_resid, padlen); 788 if (v3) { 789 /* count */ 790 *tl++ = txdr_unsigned(len); 791 /* eof */ 792 if (off + len >= va.va_size) 793 *tl++ = nfs_true; 794 else 795 *tl++ = nfs_false; 796 } 797 *tl = txdr_unsigned(len); 798 nfsm_srvdone; 799 } 800 801 /* 802 * nfs write service 803 */ 804 int 805 nfsrv_write(nfsd, slp, procp, mrq) 806 struct nfsrv_descript *nfsd; 807 struct nfssvc_sock *slp; 808 struct proc *procp; 809 struct mbuf **mrq; 810 { 811 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 812 struct mbuf *nam = nfsd->nd_nam; 813 caddr_t dpos = nfsd->nd_dpos; 814 struct ucred *cred = &nfsd->nd_cr; 815 struct iovec *ivp; 816 int i, cnt; 817 struct mbuf *mp; 818 struct nfs_fattr *fp; 819 struct iovec *iv; 820 struct vattr va, forat; 821 u_int32_t *tl; 822 int32_t t1; 823 caddr_t bpos; 824 int error = 0, rdonly, cache, len, forat_ret = 1; 825 int ioflags, aftat_ret = 1, retlen, zeroing, adjust; 826 int stable = NFSV3WRITE_FILESYNC; 827 int v3 = (nfsd->nd_flag & ND_NFSV3); 828 char *cp2; 829 struct mbuf *mb, *mreq; 830 struct vnode *vp; 831 nfsfh_t nfh; 832 fhandle_t *fhp; 833 struct uio io, *uiop = &io; 834 off_t off; 835 u_quad_t frev; 836 struct mount *mntp = NULL; 837 838 if (mrep == NULL) { 839 *mrq = NULL; 840 return (0); 841 } 842 fhp = &nfh.fh_generic; 843 nfsm_srvmtofh(fhp); 844 if ((mntp = vfs_getvfs(&fhp->fh_fsid)) == NULL) 845 return (ESTALE); 846 vn_start_write(NULL, &mntp, V_WAIT); 847 if (v3) { 848 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 849 off = fxdr_hyper(tl); 850 tl += 3; 851 stable = fxdr_unsigned(int, *tl++); 852 } else { 853 nfsm_dissect(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 854 off = (off_t)fxdr_unsigned(u_int32_t, *++tl); 855 tl += 2; 856 } 857 retlen = len = fxdr_unsigned(int32_t, *tl); 858 cnt = i = 0; 859 860 /* 861 * For NFS Version 2, it is not obvious what a write of zero length 862 * should do, but I might as well be consistent with Version 3, 863 * which is to return ok so long as there are no permission problems. 864 */ 865 if (len > 0) { 866 zeroing = 1; 867 mp = mrep; 868 while (mp) { 869 if (mp == md) { 870 zeroing = 0; 871 adjust = dpos - mtod(mp, caddr_t); 872 mp->m_len -= adjust; 873 if (mp->m_len > 0 && adjust > 0) 874 NFSMADV(mp, adjust); 875 } 876 if (zeroing) 877 mp->m_len = 0; 878 else if (mp->m_len > 0) { 879 i += mp->m_len; 880 if (i > len) { 881 mp->m_len -= (i - len); 882 zeroing = 1; 883 } 884 if (mp->m_len > 0) 885 cnt++; 886 } 887 mp = mp->m_next; 888 } 889 } 890 if (len > NFS_MAXDATA || len < 0 || i < len) { 891 error = EIO; 892 nfsm_reply(2 * NFSX_UNSIGNED); 893 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 894 vn_finished_write(mntp, 0); 895 return (0); 896 } 897 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 898 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 899 if (error) { 900 nfsm_reply(2 * NFSX_UNSIGNED); 901 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 902 vn_finished_write(mntp, 0); 903 return (0); 904 } 905 if (v3) 906 forat_ret = VOP_GETATTR(vp, &forat, cred, procp); 907 if (vp->v_type != VREG) { 908 if (v3) 909 error = EINVAL; 910 else 911 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 912 } 913 if (!error) { 914 nqsrv_getl(vp, ND_WRITE); 915 error = nfsrv_access(vp, VWRITE, cred, rdonly, procp, 1); 916 } 917 if (error) { 918 vput(vp); 919 nfsm_reply(NFSX_WCCDATA(v3)); 920 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 921 vn_finished_write(mntp, 0); 922 return (0); 923 } 924 925 if (len > 0) { 926 ivp = malloc(cnt * sizeof (struct iovec), M_TEMP, M_WAITOK); 927 uiop->uio_iov = iv = ivp; 928 uiop->uio_iovcnt = cnt; 929 mp = mrep; 930 while (mp) { 931 if (mp->m_len > 0) { 932 ivp->iov_base = mtod(mp, caddr_t); 933 ivp->iov_len = mp->m_len; 934 ivp++; 935 } 936 mp = mp->m_next; 937 } 938 939 /* 940 * XXX 941 * The IO_METASYNC flag indicates that all metadata (and not 942 * just enough to ensure data integrity) must be written to 943 * stable storage synchronously. 944 * (IO_METASYNC is not yet implemented in 4.4BSD-Lite.) 945 */ 946 if (stable == NFSV3WRITE_UNSTABLE) 947 ioflags = IO_NODELOCKED; 948 else if (stable == NFSV3WRITE_DATASYNC) 949 ioflags = (IO_SYNC | IO_NODELOCKED); 950 else 951 ioflags = (IO_METASYNC | IO_SYNC | IO_NODELOCKED); 952 uiop->uio_resid = len; 953 uiop->uio_rw = UIO_WRITE; 954 uiop->uio_segflg = UIO_SYSSPACE; 955 uiop->uio_procp = NULL; 956 uiop->uio_offset = off; 957 error = VOP_WRITE(vp, uiop, ioflags, cred); 958 nfsstats.srvvop_writes++; 959 free(iv, M_TEMP); 960 } 961 aftat_ret = VOP_GETATTR(vp, &va, cred, procp); 962 vput(vp); 963 vn_finished_write(mntp, 0); 964 if (!error) 965 error = aftat_ret; 966 nfsm_reply(NFSX_PREOPATTR(v3) + NFSX_POSTOPORFATTR(v3) + 967 2 * NFSX_UNSIGNED + NFSX_WRITEVERF(v3)); 968 if (v3) { 969 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 970 if (error) 971 return (0); 972 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 973 *tl++ = txdr_unsigned(retlen); 974 if (stable == NFSV3WRITE_UNSTABLE) 975 *tl++ = txdr_unsigned(stable); 976 else 977 *tl++ = txdr_unsigned(NFSV3WRITE_FILESYNC); 978 /* 979 * Actually, there is no need to txdr these fields, 980 * but it may make the values more human readable, 981 * for debugging purposes. 982 */ 983 *tl++ = txdr_unsigned(boottime.tv_sec); 984 *tl = txdr_unsigned(boottime.tv_usec); 985 } else { 986 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 987 nfsm_srvfillattr(&va, fp); 988 } 989 nfsm_srvdone; 990 } 991 992 /* 993 * NFS write service with write gathering support. Called when 994 * nfsrvw_procrastinate > 0. 995 * See: Chet Juszczak, "Improving the Write Performance of an NFS Server", 996 * in Proc. of the Winter 1994 Usenix Conference, pg. 247-259, San Franscisco, 997 * Jan. 1994. 998 */ 999 int 1000 nfsrv_writegather(ndp, slp, procp, mrq) 1001 struct nfsrv_descript **ndp; 1002 struct nfssvc_sock *slp; 1003 struct proc *procp; 1004 struct mbuf **mrq; 1005 { 1006 struct iovec *ivp; 1007 struct mbuf *mp; 1008 struct nfsrv_descript *wp, *nfsd, *owp, *swp; 1009 struct nfs_fattr *fp; 1010 int i = 0; 1011 struct iovec *iov; 1012 struct nfsrvw_delayhash *wpp; 1013 struct ucred *cred; 1014 struct vattr va, forat; 1015 u_int32_t *tl; 1016 int32_t t1; 1017 caddr_t bpos, dpos; 1018 int error = 0, rdonly, cache, len = 0, forat_ret = 1; 1019 int ioflags, aftat_ret = 1, s, adjust, v3, zeroing; 1020 char *cp2; 1021 struct mbuf *mb, *mreq, *mrep, *md; 1022 struct vnode *vp; 1023 struct uio io, *uiop = &io; 1024 u_quad_t frev, cur_usec; 1025 struct mount *mntp = NULL; 1026 1027 *mrq = NULL; 1028 if (*ndp) { 1029 nfsd = *ndp; 1030 *ndp = NULL; 1031 mrep = nfsd->nd_mrep; 1032 md = nfsd->nd_md; 1033 dpos = nfsd->nd_dpos; 1034 cred = &nfsd->nd_cr; 1035 v3 = (nfsd->nd_flag & ND_NFSV3); 1036 LIST_INIT(&nfsd->nd_coalesce); 1037 nfsd->nd_mreq = NULL; 1038 nfsd->nd_stable = NFSV3WRITE_FILESYNC; 1039 cur_usec = (u_quad_t)time.tv_sec * 1000000 + (u_quad_t)time.tv_usec; 1040 nfsd->nd_time = cur_usec + nfsrvw_procrastinate; 1041 1042 /* 1043 * Now, get the write header.. 1044 */ 1045 nfsm_srvmtofh(&nfsd->nd_fh); 1046 if (v3) { 1047 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 1048 nfsd->nd_off = fxdr_hyper(tl); 1049 tl += 3; 1050 nfsd->nd_stable = fxdr_unsigned(int, *tl++); 1051 } else { 1052 nfsm_dissect(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1053 nfsd->nd_off = (off_t)fxdr_unsigned(u_int32_t, *++tl); 1054 tl += 2; 1055 } 1056 len = fxdr_unsigned(int32_t, *tl); 1057 nfsd->nd_len = len; 1058 nfsd->nd_eoff = nfsd->nd_off + len; 1059 1060 /* 1061 * Trim the header out of the mbuf list and trim off any trailing 1062 * junk so that the mbuf list has only the write data. 1063 */ 1064 zeroing = 1; 1065 i = 0; 1066 mp = mrep; 1067 while (mp) { 1068 if (mp == md) { 1069 zeroing = 0; 1070 adjust = dpos - mtod(mp, caddr_t); 1071 mp->m_len -= adjust; 1072 if (mp->m_len > 0 && adjust > 0) 1073 NFSMADV(mp, adjust); 1074 } 1075 if (zeroing) 1076 mp->m_len = 0; 1077 else { 1078 i += mp->m_len; 1079 if (i > len) { 1080 mp->m_len -= (i - len); 1081 zeroing = 1; 1082 } 1083 } 1084 mp = mp->m_next; 1085 } 1086 if (len > NFS_MAXDATA || len < 0 || i < len) { 1087 nfsmout: 1088 m_freem(mrep); 1089 error = EIO; 1090 nfsm_writereply(2 * NFSX_UNSIGNED, v3); 1091 if (v3) 1092 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1093 nfsd->nd_mreq = mreq; 1094 nfsd->nd_mrep = NULL; 1095 nfsd->nd_time = 0; 1096 } 1097 1098 /* 1099 * Add this entry to the hash and time queues. 1100 */ 1101 s = splsoftclock(); 1102 owp = NULL; 1103 wp = LIST_FIRST(&slp->ns_tq); 1104 while (wp && wp->nd_time < nfsd->nd_time) { 1105 owp = wp; 1106 wp = LIST_NEXT(wp, nd_tq); 1107 } 1108 if (owp) { 1109 LIST_INSERT_AFTER(owp, nfsd, nd_tq); 1110 } else { 1111 LIST_INSERT_HEAD(&slp->ns_tq, nfsd, nd_tq); 1112 } 1113 if (nfsd->nd_mrep) { 1114 wpp = NWDELAYHASH(slp, nfsd->nd_fh.fh_fid.fid_data); 1115 owp = NULL; 1116 wp = LIST_FIRST(wpp); 1117 while (wp && 1118 memcmp((caddr_t)&nfsd->nd_fh, (caddr_t)&wp->nd_fh, NFSX_V3FH)) { 1119 owp = wp; 1120 wp = LIST_NEXT(wp, nd_hash); 1121 } 1122 while (wp && wp->nd_off < nfsd->nd_off && 1123 !memcmp((caddr_t)&nfsd->nd_fh, (caddr_t)&wp->nd_fh, NFSX_V3FH)) { 1124 owp = wp; 1125 wp = LIST_NEXT(wp, nd_hash); 1126 } 1127 if (owp) { 1128 LIST_INSERT_AFTER(owp, nfsd, nd_hash); 1129 1130 /* 1131 * Search the hash list for overlapping entries and 1132 * coalesce. 1133 */ 1134 for(; nfsd && NFSW_CONTIG(owp, nfsd); nfsd = wp) { 1135 wp = LIST_NEXT(nfsd, nd_hash); 1136 if (NFSW_SAMECRED(owp, nfsd)) 1137 nfsrvw_coalesce(owp, nfsd); 1138 } 1139 } else { 1140 LIST_INSERT_HEAD(wpp, nfsd, nd_hash); 1141 } 1142 } 1143 splx(s); 1144 } 1145 1146 /* 1147 * Now, do VOP_WRITE()s for any one(s) that need to be done now 1148 * and generate the associated reply mbuf list(s). 1149 */ 1150 loop1: 1151 cur_usec = (u_quad_t)time.tv_sec * 1000000 + (u_quad_t)time.tv_usec; 1152 s = splsoftclock(); 1153 for (nfsd = LIST_FIRST(&slp->ns_tq); nfsd; nfsd = owp) { 1154 owp = LIST_NEXT(nfsd, nd_tq); 1155 if (nfsd->nd_time > cur_usec) 1156 break; 1157 if (nfsd->nd_mreq) 1158 continue; 1159 LIST_REMOVE(nfsd, nd_tq); 1160 LIST_REMOVE(nfsd, nd_hash); 1161 splx(s); 1162 mrep = nfsd->nd_mrep; 1163 nfsd->nd_mrep = NULL; 1164 cred = &nfsd->nd_cr; 1165 v3 = (nfsd->nd_flag & ND_NFSV3); 1166 forat_ret = aftat_ret = 1; 1167 error = nfsrv_fhtovp(&nfsd->nd_fh, 1, &vp, cred, slp, 1168 nfsd->nd_nam, &rdonly, (nfsd->nd_flag & ND_KERBAUTH), 1169 FALSE); 1170 if (!error) { 1171 if (v3) 1172 forat_ret = VOP_GETATTR(vp, &forat, cred, procp); 1173 if (vp->v_type != VREG) { 1174 if (v3) 1175 error = EINVAL; 1176 else 1177 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 1178 } 1179 } else 1180 vp = NULL; 1181 if (!error) { 1182 nqsrv_getl(vp, ND_WRITE); 1183 error = nfsrv_access(vp, VWRITE, cred, rdonly, procp, 1); 1184 } 1185 1186 if (nfsd->nd_stable == NFSV3WRITE_UNSTABLE) 1187 ioflags = IO_NODELOCKED; 1188 else if (nfsd->nd_stable == NFSV3WRITE_DATASYNC) 1189 ioflags = (IO_SYNC | IO_NODELOCKED); 1190 else 1191 ioflags = (IO_METASYNC | IO_SYNC | IO_NODELOCKED); 1192 uiop->uio_rw = UIO_WRITE; 1193 uiop->uio_segflg = UIO_SYSSPACE; 1194 uiop->uio_procp = NULL; 1195 uiop->uio_offset = nfsd->nd_off; 1196 uiop->uio_resid = nfsd->nd_eoff - nfsd->nd_off; 1197 if (uiop->uio_resid > 0) { 1198 mp = mrep; 1199 i = 0; 1200 while (mp) { 1201 if (mp->m_len > 0) 1202 i++; 1203 mp = mp->m_next; 1204 } 1205 uiop->uio_iovcnt = i; 1206 iov = malloc(i * sizeof (struct iovec), M_TEMP, M_WAITOK); 1207 uiop->uio_iov = ivp = iov; 1208 mp = mrep; 1209 while (mp) { 1210 if (mp->m_len > 0) { 1211 ivp->iov_base = mtod(mp, caddr_t); 1212 ivp->iov_len = mp->m_len; 1213 ivp++; 1214 } 1215 mp = mp->m_next; 1216 } 1217 if (!error) { 1218 if (vn_start_write(vp, &mntp, V_NOWAIT) != 0) { 1219 VOP_UNLOCK(vp, 0); 1220 vn_start_write(NULL, &mntp, V_WAIT); 1221 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 1222 } 1223 if (!error) { 1224 error = VOP_WRITE(vp, uiop, ioflags, cred); 1225 nfsstats.srvvop_writes++; 1226 vn_finished_write(mntp, 0); 1227 } 1228 } 1229 free((caddr_t)iov, M_TEMP); 1230 } 1231 m_freem(mrep); 1232 if (vp) { 1233 aftat_ret = VOP_GETATTR(vp, &va, cred, procp); 1234 vput(vp); 1235 } 1236 1237 /* 1238 * Loop around generating replies for all write rpcs that have 1239 * now been completed. 1240 */ 1241 swp = nfsd; 1242 do { 1243 if (error) { 1244 nfsm_writereply(NFSX_WCCDATA(v3), v3); 1245 if (v3) { 1246 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1247 } 1248 } else { 1249 nfsm_writereply(NFSX_PREOPATTR(v3) + 1250 NFSX_POSTOPORFATTR(v3) + 2 * NFSX_UNSIGNED + 1251 NFSX_WRITEVERF(v3), v3); 1252 if (v3) { 1253 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1254 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1255 *tl++ = txdr_unsigned(nfsd->nd_len); 1256 *tl++ = txdr_unsigned(swp->nd_stable); 1257 /* 1258 * Actually, there is no need to txdr these fields, 1259 * but it may make the values more human readable, 1260 * for debugging purposes. 1261 */ 1262 *tl++ = txdr_unsigned(boottime.tv_sec); 1263 *tl = txdr_unsigned(boottime.tv_usec); 1264 } else { 1265 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 1266 nfsm_srvfillattr(&va, fp); 1267 } 1268 } 1269 nfsd->nd_mreq = mreq; 1270 if (nfsd->nd_mrep) 1271 panic("nfsrv_write: nd_mrep not free"); 1272 1273 /* 1274 * Done. Put it at the head of the timer queue so that 1275 * the final phase can return the reply. 1276 */ 1277 s = splsoftclock(); 1278 if (nfsd != swp) { 1279 nfsd->nd_time = 0; 1280 LIST_INSERT_HEAD(&slp->ns_tq, nfsd, nd_tq); 1281 } 1282 nfsd = LIST_FIRST(&swp->nd_coalesce); 1283 if (nfsd) { 1284 LIST_REMOVE(nfsd, nd_tq); 1285 } 1286 splx(s); 1287 } while (nfsd); 1288 s = splsoftclock(); 1289 swp->nd_time = 0; 1290 LIST_INSERT_HEAD(&slp->ns_tq, swp, nd_tq); 1291 splx(s); 1292 goto loop1; 1293 } 1294 splx(s); 1295 1296 /* 1297 * Search for a reply to return. 1298 */ 1299 s = splsoftclock(); 1300 LIST_FOREACH(nfsd, &slp->ns_tq, nd_tq) { 1301 if (nfsd->nd_mreq) { 1302 LIST_REMOVE(nfsd, nd_tq); 1303 *mrq = nfsd->nd_mreq; 1304 *ndp = nfsd; 1305 break; 1306 } 1307 } 1308 splx(s); 1309 return (0); 1310 } 1311 1312 /* 1313 * Coalesce the write request nfsd into owp. To do this we must: 1314 * - remove nfsd from the queues 1315 * - merge nfsd->nd_mrep into owp->nd_mrep 1316 * - update the nd_eoff and nd_stable for owp 1317 * - put nfsd on owp's nd_coalesce list 1318 * NB: Must be called at splsoftclock(). 1319 */ 1320 void 1321 nfsrvw_coalesce(owp, nfsd) 1322 struct nfsrv_descript *owp; 1323 struct nfsrv_descript *nfsd; 1324 { 1325 int overlap; 1326 struct mbuf *mp; 1327 struct nfsrv_descript *m; 1328 1329 LIST_REMOVE(nfsd, nd_hash); 1330 LIST_REMOVE(nfsd, nd_tq); 1331 if (owp->nd_eoff < nfsd->nd_eoff) { 1332 overlap = owp->nd_eoff - nfsd->nd_off; 1333 if (overlap < 0) 1334 panic("nfsrv_coalesce: bad off"); 1335 if (overlap > 0) 1336 m_adj(nfsd->nd_mrep, overlap); 1337 mp = owp->nd_mrep; 1338 while (mp->m_next) 1339 mp = mp->m_next; 1340 mp->m_next = nfsd->nd_mrep; 1341 owp->nd_eoff = nfsd->nd_eoff; 1342 } else 1343 m_freem(nfsd->nd_mrep); 1344 nfsd->nd_mrep = NULL; 1345 if (nfsd->nd_stable == NFSV3WRITE_FILESYNC) 1346 owp->nd_stable = NFSV3WRITE_FILESYNC; 1347 else if (nfsd->nd_stable == NFSV3WRITE_DATASYNC && 1348 owp->nd_stable == NFSV3WRITE_UNSTABLE) 1349 owp->nd_stable = NFSV3WRITE_DATASYNC; 1350 LIST_INSERT_HEAD(&owp->nd_coalesce, nfsd, nd_tq); 1351 /* 1352 * nfsd might hold coalesce elements! Move them to owp. 1353 * Otherwise, requests may be lost and clients will be stuck. 1354 */ 1355 while ((m = LIST_FIRST(&nfsd->nd_coalesce)) != NULL) { 1356 LIST_REMOVE(m, nd_tq); 1357 LIST_INSERT_HEAD(&owp->nd_coalesce, m, nd_tq); 1358 } 1359 } 1360 1361 /* 1362 * nfs create service 1363 * now does a truncate to 0 length via. setattr if it already exists 1364 */ 1365 int 1366 nfsrv_create(nfsd, slp, procp, mrq) 1367 struct nfsrv_descript *nfsd; 1368 struct nfssvc_sock *slp; 1369 struct proc *procp; 1370 struct mbuf **mrq; 1371 { 1372 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1373 struct mbuf *nam = nfsd->nd_nam; 1374 caddr_t dpos = nfsd->nd_dpos; 1375 struct ucred *cred = &nfsd->nd_cr; 1376 struct nfs_fattr *fp; 1377 struct vattr va, dirfor, diraft; 1378 struct nfsv2_sattr *sp; 1379 u_int32_t *tl; 1380 struct nameidata nd; 1381 caddr_t cp; 1382 int32_t t1; 1383 caddr_t bpos; 1384 int error = 0, cache, len, tsize, dirfor_ret = 1, diraft_ret = 1; 1385 int rdev = 0; 1386 int v3 = (nfsd->nd_flag & ND_NFSV3), how, exclusive_flag = 0; 1387 char *cp2; 1388 struct mbuf *mb, *mreq; 1389 struct vnode *vp = NULL, *dirp = NULL; 1390 nfsfh_t nfh; 1391 fhandle_t *fhp; 1392 u_quad_t frev, tempsize; 1393 u_char cverf[NFSX_V3CREATEVERF]; 1394 struct mount *mp = NULL; 1395 1396 nd.ni_cnd.cn_nameiop = 0; 1397 fhp = &nfh.fh_generic; 1398 nfsm_srvmtofh(fhp); 1399 if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) 1400 return (ESTALE); 1401 vn_start_write(NULL, &mp, V_WAIT); 1402 nfsm_srvnamesiz(len); 1403 nd.ni_cnd.cn_cred = cred; 1404 nd.ni_cnd.cn_nameiop = CREATE; 1405 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 1406 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 1407 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1408 if (dirp) { 1409 if (v3) 1410 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 1411 procp); 1412 else { 1413 vrele(dirp); 1414 dirp = (struct vnode *)0; 1415 } 1416 } 1417 if (error) { 1418 nfsm_reply(NFSX_WCCDATA(v3)); 1419 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1420 if (dirp) 1421 vrele(dirp); 1422 vn_finished_write(mp, 0); 1423 return (0); 1424 } 1425 VATTR_NULL(&va); 1426 if (v3) { 1427 va.va_mode = 0; 1428 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1429 how = fxdr_unsigned(int, *tl); 1430 switch (how) { 1431 case NFSV3CREATE_GUARDED: 1432 if (nd.ni_vp) { 1433 error = EEXIST; 1434 break; 1435 } 1436 case NFSV3CREATE_UNCHECKED: 1437 nfsm_srvsattr(&va); 1438 break; 1439 case NFSV3CREATE_EXCLUSIVE: 1440 nfsm_dissect(cp, caddr_t, NFSX_V3CREATEVERF); 1441 memcpy(cverf, cp, NFSX_V3CREATEVERF); 1442 exclusive_flag = 1; 1443 break; 1444 }; 1445 va.va_type = VREG; 1446 } else { 1447 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1448 va.va_type = IFTOVT(fxdr_unsigned(u_int32_t, sp->sa_mode)); 1449 if (va.va_type == VNON) 1450 va.va_type = VREG; 1451 va.va_mode = nfstov_mode(sp->sa_mode); 1452 switch (va.va_type) { 1453 case VREG: 1454 tsize = fxdr_unsigned(int32_t, sp->sa_size); 1455 if (tsize != -1) 1456 va.va_size = (u_quad_t)tsize; 1457 break; 1458 case VCHR: 1459 case VBLK: 1460 case VFIFO: 1461 rdev = fxdr_unsigned(int32_t, sp->sa_size); 1462 break; 1463 default: 1464 break; 1465 }; 1466 } 1467 1468 /* 1469 * Iff doesn't exist, create it 1470 * otherwise just truncate to 0 length 1471 * should I set the mode too ?? 1472 */ 1473 if (nd.ni_vp == NULL) { 1474 if (va.va_type == VREG || va.va_type == VSOCK) { 1475 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1476 error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1477 if (!error) { 1478 if (exclusive_flag) { 1479 exclusive_flag = 0; 1480 VATTR_NULL(&va); 1481 /* 1482 * XXX 1483 * assuming NFSX_V3CREATEVERF 1484 * == sizeof(nfstime3) 1485 */ 1486 fxdr_nfsv3time(cverf, &va.va_atime); 1487 error = VOP_SETATTR(nd.ni_vp, &va, cred, 1488 procp); 1489 } 1490 } 1491 } else if (va.va_type == VCHR || va.va_type == VBLK || 1492 va.va_type == VFIFO) { 1493 if (va.va_type == VCHR && rdev == 0xffffffff) 1494 va.va_type = VFIFO; 1495 if (va.va_type != VFIFO && 1496 (error = suser(cred, (u_short *)0))) { 1497 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1498 vput(nd.ni_dvp); 1499 nfsm_reply(0); 1500 vn_finished_write(mp, 0); 1501 return (error); 1502 } else 1503 va.va_rdev = (dev_t)rdev; 1504 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1505 error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, 1506 &va); 1507 if (error) { 1508 nfsm_reply(0); 1509 } 1510 if (nd.ni_cnd.cn_flags & ISSYMLINK) { 1511 vrele(nd.ni_dvp); 1512 vput(nd.ni_vp); 1513 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1514 error = EINVAL; 1515 nfsm_reply(0); 1516 } 1517 } else { 1518 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1519 vput(nd.ni_dvp); 1520 error = ENXIO; 1521 } 1522 vp = nd.ni_vp; 1523 } else { 1524 vp = nd.ni_vp; 1525 if (nd.ni_dvp == vp) 1526 vrele(nd.ni_dvp); 1527 else 1528 vput(nd.ni_dvp); 1529 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1530 if (!error && va.va_size != -1) { 1531 error = nfsrv_access(vp, VWRITE, cred, 1532 (nd.ni_cnd.cn_flags & RDONLY), procp, 0); 1533 if (!error) { 1534 nqsrv_getl(vp, ND_WRITE); 1535 tempsize = va.va_size; 1536 VATTR_NULL(&va); 1537 va.va_size = tempsize; 1538 error = VOP_SETATTR(vp, &va, cred, 1539 procp); 1540 } 1541 } 1542 if (error) 1543 vput(vp); 1544 } 1545 if (!error) { 1546 memset((caddr_t)fhp, 0, sizeof(nfh)); 1547 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsidx; 1548 error = VFS_VPTOFH(vp, &fhp->fh_fid); 1549 if (!error) 1550 error = VOP_GETATTR(vp, &va, cred, procp); 1551 vput(vp); 1552 } 1553 if (v3) { 1554 if (exclusive_flag && !error) { 1555 /* 1556 * XXX assuming NFSX_V3CREATEVERF == sizeof(nfstime3) 1557 */ 1558 char oldverf[NFSX_V3CREATEVERF]; 1559 1560 txdr_nfsv3time(&va.va_atime, oldverf); 1561 if (memcmp(cverf, oldverf, NFSX_V3CREATEVERF)) 1562 error = EEXIST; 1563 } 1564 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 1565 vrele(dirp); 1566 } 1567 nfsm_reply(NFSX_SRVFH(v3) + NFSX_FATTR(v3) + NFSX_WCCDATA(v3)); 1568 if (v3) { 1569 if (!error) { 1570 nfsm_srvpostop_fh(fhp); 1571 nfsm_srvpostop_attr(0, &va); 1572 } 1573 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1574 } else { 1575 nfsm_srvfhtom(fhp, v3); 1576 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 1577 nfsm_srvfillattr(&va, fp); 1578 } 1579 vn_finished_write(mp, 0); 1580 return (0); 1581 nfsmout: 1582 if (dirp) 1583 vrele(dirp); 1584 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1585 if (nd.ni_dvp == nd.ni_vp) 1586 vrele(nd.ni_dvp); 1587 else 1588 vput(nd.ni_dvp); 1589 if (nd.ni_vp) 1590 vput(nd.ni_vp); 1591 vn_finished_write(mp, 0); 1592 return (error); 1593 } 1594 1595 /* 1596 * nfs v3 mknod service 1597 */ 1598 int 1599 nfsrv_mknod(nfsd, slp, procp, mrq) 1600 struct nfsrv_descript *nfsd; 1601 struct nfssvc_sock *slp; 1602 struct proc *procp; 1603 struct mbuf **mrq; 1604 { 1605 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1606 struct mbuf *nam = nfsd->nd_nam; 1607 caddr_t dpos = nfsd->nd_dpos; 1608 struct ucred *cred = &nfsd->nd_cr; 1609 struct vattr va, dirfor, diraft; 1610 u_int32_t *tl; 1611 struct nameidata nd; 1612 int32_t t1; 1613 caddr_t bpos; 1614 int error = 0, cache, len, dirfor_ret = 1, diraft_ret = 1; 1615 u_int32_t major, minor; 1616 enum vtype vtyp; 1617 char *cp2; 1618 struct mbuf *mb, *mreq; 1619 struct vnode *vp, *dirp = (struct vnode *)0; 1620 nfsfh_t nfh; 1621 fhandle_t *fhp; 1622 u_quad_t frev; 1623 struct mount *mp = NULL; 1624 1625 nd.ni_cnd.cn_nameiop = 0; 1626 fhp = &nfh.fh_generic; 1627 nfsm_srvmtofh(fhp); 1628 if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) 1629 return (ESTALE); 1630 vn_start_write(NULL, &mp, V_WAIT); 1631 nfsm_srvnamesiz(len); 1632 nd.ni_cnd.cn_cred = cred; 1633 nd.ni_cnd.cn_nameiop = CREATE; 1634 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 1635 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 1636 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1637 if (dirp) 1638 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, procp); 1639 if (error) { 1640 nfsm_reply(NFSX_WCCDATA(1)); 1641 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1642 if (dirp) 1643 vrele(dirp); 1644 vn_finished_write(mp, 0); 1645 return (0); 1646 } 1647 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1648 vtyp = nfsv3tov_type(*tl); 1649 if (vtyp != VCHR && vtyp != VBLK && vtyp != VSOCK && vtyp != VFIFO) { 1650 error = NFSERR_BADTYPE; 1651 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1652 if (nd.ni_dvp == nd.ni_vp) 1653 vrele(nd.ni_dvp); 1654 else 1655 vput(nd.ni_dvp); 1656 if (nd.ni_vp) 1657 vput(nd.ni_vp); 1658 goto out; 1659 } 1660 VATTR_NULL(&va); 1661 va.va_mode = 0; 1662 nfsm_srvsattr(&va); 1663 if (vtyp == VCHR || vtyp == VBLK) { 1664 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1665 major = fxdr_unsigned(u_int32_t, *tl++); 1666 minor = fxdr_unsigned(u_int32_t, *tl); 1667 va.va_rdev = makedev(major, minor); 1668 } 1669 1670 /* 1671 * Iff doesn't exist, create it. 1672 */ 1673 if (nd.ni_vp) { 1674 error = EEXIST; 1675 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1676 if (nd.ni_dvp == nd.ni_vp) 1677 vrele(nd.ni_dvp); 1678 else 1679 vput(nd.ni_dvp); 1680 vput(nd.ni_vp); 1681 goto out; 1682 } 1683 va.va_type = vtyp; 1684 if (vtyp == VSOCK) { 1685 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1686 error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1687 } else { 1688 if (va.va_type != VFIFO && 1689 (error = suser(cred, (u_short *)0))) { 1690 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1691 vput(nd.ni_dvp); 1692 goto out; 1693 } 1694 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1695 error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1696 if (error) { 1697 goto out; 1698 } 1699 if (error) 1700 goto out; 1701 if (nd.ni_cnd.cn_flags & ISSYMLINK) { 1702 vput(nd.ni_vp); 1703 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1704 error = EINVAL; 1705 } 1706 } 1707 out: 1708 vp = nd.ni_vp; 1709 if (!error) { 1710 memset((caddr_t)fhp, 0, sizeof(nfh)); 1711 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsidx; 1712 error = VFS_VPTOFH(vp, &fhp->fh_fid); 1713 if (!error) 1714 error = VOP_GETATTR(vp, &va, cred, procp); 1715 vput(vp); 1716 } 1717 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 1718 vrele(dirp); 1719 nfsm_reply(NFSX_SRVFH(1) + NFSX_POSTOPATTR(1) + NFSX_WCCDATA(1)); 1720 if (!error) { 1721 nfsm_srvpostop_fh(fhp); 1722 nfsm_srvpostop_attr(0, &va); 1723 } 1724 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1725 vn_finished_write(mp, 0); 1726 return (0); 1727 nfsmout: 1728 if (dirp) 1729 vrele(dirp); 1730 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1731 if (nd.ni_dvp == nd.ni_vp) 1732 vrele(nd.ni_dvp); 1733 else 1734 vput(nd.ni_dvp); 1735 if (nd.ni_vp) 1736 vput(nd.ni_vp); 1737 vn_finished_write(mp, 0); 1738 return (error); 1739 } 1740 1741 /* 1742 * nfs remove service 1743 */ 1744 int 1745 nfsrv_remove(nfsd, slp, procp, mrq) 1746 struct nfsrv_descript *nfsd; 1747 struct nfssvc_sock *slp; 1748 struct proc *procp; 1749 struct mbuf **mrq; 1750 { 1751 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1752 struct mbuf *nam = nfsd->nd_nam; 1753 caddr_t dpos = nfsd->nd_dpos; 1754 struct ucred *cred = &nfsd->nd_cr; 1755 struct nameidata nd; 1756 u_int32_t *tl; 1757 int32_t t1; 1758 caddr_t bpos; 1759 int error = 0, cache, len, dirfor_ret = 1, diraft_ret = 1; 1760 int v3 = (nfsd->nd_flag & ND_NFSV3); 1761 char *cp2; 1762 struct mbuf *mb, *mreq; 1763 struct vnode *vp, *dirp; 1764 struct vattr dirfor, diraft; 1765 nfsfh_t nfh; 1766 fhandle_t *fhp; 1767 u_quad_t frev; 1768 struct mount *mp = NULL; 1769 1770 #ifndef nolint 1771 vp = (struct vnode *)0; 1772 #endif 1773 fhp = &nfh.fh_generic; 1774 nfsm_srvmtofh(fhp); 1775 if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) 1776 return (ESTALE); 1777 vn_start_write(NULL, &mp, V_WAIT); 1778 nfsm_srvnamesiz(len); 1779 nd.ni_cnd.cn_cred = cred; 1780 nd.ni_cnd.cn_nameiop = DELETE; 1781 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 1782 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 1783 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1784 if (dirp) { 1785 if (v3) 1786 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 1787 procp); 1788 else 1789 vrele(dirp); 1790 } 1791 if (!error) { 1792 vp = nd.ni_vp; 1793 if (vp->v_type == VDIR && 1794 (error = suser(cred, (u_short *)0)) != 0) 1795 goto out; 1796 /* 1797 * The root of a mounted filesystem cannot be deleted. 1798 */ 1799 if (vp->v_flag & VROOT) { 1800 error = EBUSY; 1801 goto out; 1802 } 1803 out: 1804 if (!error) { 1805 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1806 nqsrv_getl(vp, ND_WRITE); 1807 error = VOP_REMOVE(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); 1808 } else { 1809 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1810 if (nd.ni_dvp == vp) 1811 vrele(nd.ni_dvp); 1812 else 1813 vput(nd.ni_dvp); 1814 vput(vp); 1815 } 1816 } 1817 if (dirp && v3) { 1818 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 1819 vrele(dirp); 1820 } 1821 nfsm_reply(NFSX_WCCDATA(v3)); 1822 if (v3) { 1823 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1824 vn_finished_write(mp, 0); 1825 return (0); 1826 } 1827 vn_finished_write(mp, 0); 1828 nfsm_srvdone; 1829 } 1830 1831 /* 1832 * nfs rename service 1833 */ 1834 int 1835 nfsrv_rename(nfsd, slp, procp, mrq) 1836 struct nfsrv_descript *nfsd; 1837 struct nfssvc_sock *slp; 1838 struct proc *procp; 1839 struct mbuf **mrq; 1840 { 1841 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1842 struct mbuf *nam = nfsd->nd_nam; 1843 caddr_t dpos = nfsd->nd_dpos; 1844 struct ucred *cred = &nfsd->nd_cr; 1845 u_int32_t *tl; 1846 int32_t t1; 1847 caddr_t bpos; 1848 int error = 0, cache, fdirfor_ret = 1, fdiraft_ret = 1; 1849 uint32_t len, len2; 1850 int tdirfor_ret = 1, tdiraft_ret = 1; 1851 int v3 = (nfsd->nd_flag & ND_NFSV3); 1852 char *cp2; 1853 struct mbuf *mb, *mreq; 1854 struct nameidata fromnd, tond; 1855 struct vnode *fvp, *tvp, *tdvp, *fdirp = (struct vnode *)0; 1856 struct vnode *tdirp = (struct vnode *)0; 1857 struct vattr fdirfor, fdiraft, tdirfor, tdiraft; 1858 nfsfh_t fnfh, tnfh; 1859 fhandle_t *ffhp, *tfhp; 1860 u_quad_t frev; 1861 uid_t saved_uid; 1862 struct mount *mp = NULL; 1863 1864 #ifndef nolint 1865 fvp = (struct vnode *)0; 1866 #endif 1867 ffhp = &fnfh.fh_generic; 1868 tfhp = &tnfh.fh_generic; 1869 fromnd.ni_cnd.cn_nameiop = 0; 1870 tond.ni_cnd.cn_nameiop = 0; 1871 nfsm_srvmtofh(ffhp); 1872 if ((mp = vfs_getvfs(&ffhp->fh_fsid)) == NULL) 1873 return (ESTALE); 1874 vn_start_write(NULL, &mp, V_WAIT); 1875 nfsm_srvnamesiz(len); 1876 /* 1877 * Remember our original uid so that we can reset cr_uid before 1878 * the second nfs_namei() call, in case it is remapped. 1879 */ 1880 saved_uid = cred->cr_uid; 1881 fromnd.ni_cnd.cn_cred = cred; 1882 fromnd.ni_cnd.cn_nameiop = DELETE; 1883 fromnd.ni_cnd.cn_flags = WANTPARENT | SAVESTART; 1884 error = nfs_namei(&fromnd, ffhp, len, slp, nam, &md, 1885 &dpos, &fdirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1886 if (fdirp) { 1887 if (v3) 1888 fdirfor_ret = VOP_GETATTR(fdirp, &fdirfor, cred, 1889 procp); 1890 else { 1891 vrele(fdirp); 1892 fdirp = (struct vnode *)0; 1893 } 1894 } 1895 if (error) { 1896 nfsm_reply(2 * NFSX_WCCDATA(v3)); 1897 nfsm_srvwcc_data(fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft); 1898 nfsm_srvwcc_data(tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft); 1899 if (fdirp) 1900 vrele(fdirp); 1901 vn_finished_write(mp, 0); 1902 return (0); 1903 } 1904 fvp = fromnd.ni_vp; 1905 nfsm_srvmtofh(tfhp); 1906 if (v3) { 1907 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 1908 len2 = fxdr_unsigned(uint32_t, *tl); 1909 /* len2 will be checked by nfs_namei */ 1910 } 1911 else { 1912 /* NFSv2 */ 1913 nfsm_strsiz(len2, NFS_MAXNAMLEN); 1914 } 1915 cred->cr_uid = saved_uid; 1916 tond.ni_cnd.cn_cred = cred; 1917 tond.ni_cnd.cn_nameiop = RENAME; 1918 tond.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF | NOCACHE | SAVESTART; 1919 error = nfs_namei(&tond, tfhp, len2, slp, nam, &md, 1920 &dpos, &tdirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 1921 if (tdirp) { 1922 if (v3) 1923 tdirfor_ret = VOP_GETATTR(tdirp, &tdirfor, cred, 1924 procp); 1925 else { 1926 vrele(tdirp); 1927 tdirp = (struct vnode *)0; 1928 } 1929 } 1930 if (error) { 1931 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 1932 vrele(fromnd.ni_dvp); 1933 vrele(fvp); 1934 goto out1; 1935 } 1936 tdvp = tond.ni_dvp; 1937 tvp = tond.ni_vp; 1938 if (tvp != NULL) { 1939 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 1940 if (v3) 1941 error = EEXIST; 1942 else 1943 error = EISDIR; 1944 goto out; 1945 } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 1946 if (v3) 1947 error = EEXIST; 1948 else 1949 error = ENOTDIR; 1950 goto out; 1951 } 1952 if (tvp->v_type == VDIR && tvp->v_mountedhere) { 1953 if (v3) 1954 error = EXDEV; 1955 else 1956 error = ENOTEMPTY; 1957 goto out; 1958 } 1959 } 1960 if (fvp->v_type == VDIR && fvp->v_mountedhere) { 1961 if (v3) 1962 error = EXDEV; 1963 else 1964 error = ENOTEMPTY; 1965 goto out; 1966 } 1967 if (fvp->v_mount != tdvp->v_mount) { 1968 if (v3) 1969 error = EXDEV; 1970 else 1971 error = ENOTEMPTY; 1972 goto out; 1973 } 1974 if (fvp == tdvp) { 1975 if (v3) 1976 error = EINVAL; 1977 else 1978 error = ENOTEMPTY; 1979 } 1980 /* 1981 * If source is the same as the destination (that is the 1982 * same vnode with the same name in the same directory), 1983 * then there is nothing to do. 1984 */ 1985 if (fvp == tvp && fromnd.ni_dvp == tdvp && 1986 fromnd.ni_cnd.cn_namelen == tond.ni_cnd.cn_namelen && 1987 !memcmp(fromnd.ni_cnd.cn_nameptr, tond.ni_cnd.cn_nameptr, 1988 fromnd.ni_cnd.cn_namelen)) 1989 error = -1; 1990 out: 1991 if (!error) { 1992 nqsrv_getl(fromnd.ni_dvp, ND_WRITE); 1993 nqsrv_getl(tdvp, ND_WRITE); 1994 if (tvp) { 1995 nqsrv_getl(tvp, ND_WRITE); 1996 } 1997 error = VOP_RENAME(fromnd.ni_dvp, fromnd.ni_vp, &fromnd.ni_cnd, 1998 tond.ni_dvp, tond.ni_vp, &tond.ni_cnd); 1999 } else { 2000 VOP_ABORTOP(tond.ni_dvp, &tond.ni_cnd); 2001 if (tdvp == tvp) 2002 vrele(tdvp); 2003 else 2004 vput(tdvp); 2005 if (tvp) 2006 vput(tvp); 2007 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 2008 vrele(fromnd.ni_dvp); 2009 vrele(fvp); 2010 if (error == -1) 2011 error = 0; 2012 } 2013 vrele(tond.ni_startdir); 2014 PNBUF_PUT(tond.ni_cnd.cn_pnbuf); 2015 out1: 2016 if (fdirp) { 2017 fdiraft_ret = VOP_GETATTR(fdirp, &fdiraft, cred, procp); 2018 vrele(fdirp); 2019 } 2020 if (tdirp) { 2021 tdiraft_ret = VOP_GETATTR(tdirp, &tdiraft, cred, procp); 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 if (tdirp) 2038 vrele(tdirp); 2039 if (tond.ni_cnd.cn_nameiop) { 2040 vrele(tond.ni_startdir); 2041 PNBUF_PUT(tond.ni_cnd.cn_pnbuf); 2042 } 2043 if (fromnd.ni_cnd.cn_nameiop) { 2044 vrele(fromnd.ni_startdir); 2045 PNBUF_PUT(fromnd.ni_cnd.cn_pnbuf); 2046 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 2047 vrele(fromnd.ni_dvp); 2048 vrele(fvp); 2049 } 2050 return (error); 2051 } 2052 2053 /* 2054 * nfs link service 2055 */ 2056 int 2057 nfsrv_link(nfsd, slp, procp, mrq) 2058 struct nfsrv_descript *nfsd; 2059 struct nfssvc_sock *slp; 2060 struct proc *procp; 2061 struct mbuf **mrq; 2062 { 2063 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2064 struct mbuf *nam = nfsd->nd_nam; 2065 caddr_t dpos = nfsd->nd_dpos; 2066 struct ucred *cred = &nfsd->nd_cr; 2067 struct nameidata nd; 2068 u_int32_t *tl; 2069 int32_t t1; 2070 caddr_t bpos; 2071 int error = 0, rdonly, cache, len, dirfor_ret = 1, diraft_ret = 1; 2072 int getret = 1, v3 = (nfsd->nd_flag & ND_NFSV3); 2073 char *cp2; 2074 struct mbuf *mb, *mreq; 2075 struct vnode *vp, *xp, *dirp = (struct vnode *)0; 2076 struct vattr dirfor, diraft, at; 2077 nfsfh_t nfh, dnfh; 2078 fhandle_t *fhp, *dfhp; 2079 u_quad_t frev; 2080 struct mount *mp = NULL; 2081 2082 fhp = &nfh.fh_generic; 2083 dfhp = &dnfh.fh_generic; 2084 nfsm_srvmtofh(fhp); 2085 if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) 2086 return (ESTALE); 2087 vn_start_write(NULL, &mp, V_WAIT); 2088 nfsm_srvmtofh(dfhp); 2089 nfsm_srvnamesiz(len); 2090 error = nfsrv_fhtovp(fhp, FALSE, &vp, cred, slp, nam, 2091 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2092 if (error) { 2093 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2094 nfsm_srvpostop_attr(getret, &at); 2095 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2096 vn_finished_write(mp, 0); 2097 return (0); 2098 } 2099 if (vp->v_type == VDIR && (error = suser(cred, (u_short *)0)) != 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, dfhp, len, slp, nam, &md, &dpos, 2105 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2106 if (dirp) { 2107 if (v3) 2108 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 2109 procp); 2110 else { 2111 vrele(dirp); 2112 dirp = (struct vnode *)0; 2113 } 2114 } 2115 if (error) 2116 goto out1; 2117 xp = nd.ni_vp; 2118 if (xp != NULL) { 2119 error = EEXIST; 2120 goto out; 2121 } 2122 xp = nd.ni_dvp; 2123 if (vp->v_mount != xp->v_mount) 2124 error = EXDEV; 2125 out: 2126 if (!error) { 2127 nqsrv_getl(vp, ND_WRITE); 2128 nqsrv_getl(xp, ND_WRITE); 2129 error = VOP_LINK(nd.ni_dvp, vp, &nd.ni_cnd); 2130 } else { 2131 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2132 if (nd.ni_dvp == nd.ni_vp) 2133 vrele(nd.ni_dvp); 2134 else 2135 vput(nd.ni_dvp); 2136 if (nd.ni_vp) 2137 vrele(nd.ni_vp); 2138 } 2139 out1: 2140 if (v3) 2141 getret = VOP_GETATTR(vp, &at, cred, procp); 2142 if (dirp) { 2143 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 2144 vrele(dirp); 2145 } 2146 vrele(vp); 2147 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2148 if (v3) { 2149 nfsm_srvpostop_attr(getret, &at); 2150 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2151 vn_finished_write(mp, 0); 2152 return (0); 2153 } 2154 vn_finished_write(mp, 0); 2155 nfsm_srvdone; 2156 } 2157 2158 /* 2159 * nfs symbolic link service 2160 */ 2161 int 2162 nfsrv_symlink(nfsd, slp, procp, mrq) 2163 struct nfsrv_descript *nfsd; 2164 struct nfssvc_sock *slp; 2165 struct proc *procp; 2166 struct mbuf **mrq; 2167 { 2168 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2169 struct mbuf *nam = nfsd->nd_nam; 2170 caddr_t dpos = nfsd->nd_dpos; 2171 struct ucred *cred = &nfsd->nd_cr; 2172 struct vattr va, dirfor, diraft; 2173 struct nameidata nd; 2174 u_int32_t *tl; 2175 int32_t t1; 2176 struct nfsv2_sattr *sp; 2177 char *bpos, *pathcp = NULL, *cp2; 2178 struct uio io; 2179 struct iovec iv; 2180 int error = 0, cache, dirfor_ret = 1, diraft_ret = 1; 2181 uint32_t len, len2; 2182 int v3 = (nfsd->nd_flag & ND_NFSV3); 2183 struct mbuf *mb, *mreq; 2184 struct vnode *dirp = (struct vnode *)0; 2185 nfsfh_t nfh; 2186 fhandle_t *fhp; 2187 u_quad_t frev; 2188 struct mount *mp = NULL; 2189 2190 nd.ni_cnd.cn_nameiop = 0; 2191 fhp = &nfh.fh_generic; 2192 nfsm_srvmtofh(fhp); 2193 if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) 2194 return (ESTALE); 2195 vn_start_write(NULL, &mp, V_WAIT); 2196 nfsm_srvnamesiz(len); 2197 nd.ni_cnd.cn_cred = cred; 2198 nd.ni_cnd.cn_nameiop = CREATE; 2199 nd.ni_cnd.cn_flags = LOCKPARENT; 2200 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 2201 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2202 if (dirp) { 2203 if (v3) 2204 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 2205 procp); 2206 else { 2207 vrele(dirp); 2208 dirp = (struct vnode *)0; 2209 } 2210 } 2211 if (error) 2212 goto out; 2213 VATTR_NULL(&va); 2214 if (v3) { 2215 va.va_mode = 0; 2216 nfsm_srvsattr(&va); 2217 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 2218 len2 = fxdr_unsigned(uint32_t, *tl); 2219 if (len2 > PATH_MAX) { 2220 /* XXX should check _PC_NO_TRUNC */ 2221 error = ENAMETOOLONG; 2222 goto abortop; 2223 } 2224 } 2225 else { 2226 /* NFSv2 */ 2227 nfsm_strsiz(len2, NFS_MAXPATHLEN); 2228 } 2229 pathcp = malloc(len2 + 1, M_TEMP, M_WAITOK); 2230 iv.iov_base = pathcp; 2231 iv.iov_len = len2; 2232 io.uio_resid = len2; 2233 io.uio_offset = 0; 2234 io.uio_iov = &iv; 2235 io.uio_iovcnt = 1; 2236 io.uio_segflg = UIO_SYSSPACE; 2237 io.uio_rw = UIO_READ; 2238 io.uio_procp = NULL; 2239 nfsm_mtouio(&io, len2); 2240 if (!v3) { 2241 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2242 va.va_mode = fxdr_unsigned(u_int16_t, sp->sa_mode); 2243 } 2244 *(pathcp + len2) = '\0'; 2245 if (nd.ni_vp) { 2246 error = EEXIST; 2247 abortop: 2248 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2249 if (nd.ni_dvp == nd.ni_vp) 2250 vrele(nd.ni_dvp); 2251 else 2252 vput(nd.ni_dvp); 2253 if (nd.ni_vp) 2254 vrele(nd.ni_vp); 2255 goto out; 2256 } 2257 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2258 error = VOP_SYMLINK(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va, pathcp); 2259 if (!error) { 2260 if (v3) { 2261 memset((caddr_t)fhp, 0, sizeof(nfh)); 2262 fhp->fh_fsid = nd.ni_vp->v_mount->mnt_stat.f_fsidx; 2263 error = VFS_VPTOFH(nd.ni_vp, &fhp->fh_fid); 2264 if (!error) 2265 error = VOP_GETATTR(nd.ni_vp, &va, cred, 2266 procp); 2267 vput(nd.ni_vp); 2268 } else { 2269 vput(nd.ni_vp); 2270 } 2271 } 2272 out: 2273 if (pathcp) 2274 free(pathcp, M_TEMP); 2275 if (dirp) { 2276 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 2277 vrele(dirp); 2278 } 2279 nfsm_reply(NFSX_SRVFH(v3) + NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2280 if (v3) { 2281 if (!error) { 2282 nfsm_srvpostop_fh(fhp); 2283 nfsm_srvpostop_attr(0, &va); 2284 } 2285 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2286 } 2287 vn_finished_write(mp, 0); 2288 return (0); 2289 nfsmout: 2290 if (dirp) 2291 vrele(dirp); 2292 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2293 if (nd.ni_dvp == nd.ni_vp) 2294 vrele(nd.ni_dvp); 2295 else 2296 vput(nd.ni_dvp); 2297 if (nd.ni_vp) 2298 vrele(nd.ni_vp); 2299 if (pathcp) 2300 free(pathcp, M_TEMP); 2301 vn_finished_write(mp, 0); 2302 return (error); 2303 } 2304 2305 /* 2306 * nfs mkdir service 2307 */ 2308 int 2309 nfsrv_mkdir(nfsd, slp, procp, mrq) 2310 struct nfsrv_descript *nfsd; 2311 struct nfssvc_sock *slp; 2312 struct proc *procp; 2313 struct mbuf **mrq; 2314 { 2315 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2316 struct mbuf *nam = nfsd->nd_nam; 2317 caddr_t dpos = nfsd->nd_dpos; 2318 struct ucred *cred = &nfsd->nd_cr; 2319 struct vattr va, dirfor, diraft; 2320 struct nfs_fattr *fp; 2321 struct nameidata nd; 2322 caddr_t cp; 2323 u_int32_t *tl; 2324 int32_t t1; 2325 caddr_t bpos; 2326 int error = 0, cache, len, dirfor_ret = 1, diraft_ret = 1; 2327 int v3 = (nfsd->nd_flag & ND_NFSV3); 2328 char *cp2; 2329 struct mbuf *mb, *mreq; 2330 struct vnode *vp, *dirp = (struct vnode *)0; 2331 nfsfh_t nfh; 2332 fhandle_t *fhp; 2333 u_quad_t frev; 2334 struct mount *mp = NULL; 2335 2336 fhp = &nfh.fh_generic; 2337 nfsm_srvmtofh(fhp); 2338 if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) 2339 return (ESTALE); 2340 vn_start_write(NULL, &mp, V_WAIT); 2341 nfsm_srvnamesiz(len); 2342 nd.ni_cnd.cn_cred = cred; 2343 nd.ni_cnd.cn_nameiop = CREATE; 2344 nd.ni_cnd.cn_flags = LOCKPARENT; 2345 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 2346 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2347 if (dirp) { 2348 if (v3) 2349 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 2350 procp); 2351 else { 2352 vrele(dirp); 2353 dirp = (struct vnode *)0; 2354 } 2355 } 2356 if (error) { 2357 nfsm_reply(NFSX_WCCDATA(v3)); 2358 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2359 if (dirp) 2360 vrele(dirp); 2361 vn_finished_write(mp, 0); 2362 return (0); 2363 } 2364 VATTR_NULL(&va); 2365 if (v3) { 2366 va.va_mode = 0; 2367 nfsm_srvsattr(&va); 2368 } else { 2369 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2370 va.va_mode = nfstov_mode(*tl++); 2371 } 2372 va.va_type = VDIR; 2373 vp = nd.ni_vp; 2374 if (vp != NULL) { 2375 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2376 if (nd.ni_dvp == vp) 2377 vrele(nd.ni_dvp); 2378 else 2379 vput(nd.ni_dvp); 2380 vrele(vp); 2381 error = EEXIST; 2382 goto out; 2383 } 2384 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2385 error = VOP_MKDIR(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 2386 if (!error) { 2387 vp = nd.ni_vp; 2388 memset((caddr_t)fhp, 0, sizeof(nfh)); 2389 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsidx; 2390 error = VFS_VPTOFH(vp, &fhp->fh_fid); 2391 if (!error) 2392 error = VOP_GETATTR(vp, &va, cred, procp); 2393 vput(vp); 2394 } 2395 out: 2396 if (dirp) { 2397 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 2398 vrele(dirp); 2399 } 2400 nfsm_reply(NFSX_SRVFH(v3) + NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2401 if (v3) { 2402 if (!error) { 2403 nfsm_srvpostop_fh(fhp); 2404 nfsm_srvpostop_attr(0, &va); 2405 } 2406 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2407 } else { 2408 nfsm_srvfhtom(fhp, v3); 2409 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 2410 nfsm_srvfillattr(&va, fp); 2411 } 2412 vn_finished_write(mp, 0); 2413 return (0); 2414 nfsmout: 2415 if (dirp) 2416 vrele(dirp); 2417 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2418 if (nd.ni_dvp == nd.ni_vp) 2419 vrele(nd.ni_dvp); 2420 else 2421 vput(nd.ni_dvp); 2422 if (nd.ni_vp) 2423 vrele(nd.ni_vp); 2424 vn_finished_write(mp, 0); 2425 return (error); 2426 } 2427 2428 /* 2429 * nfs rmdir service 2430 */ 2431 int 2432 nfsrv_rmdir(nfsd, slp, procp, mrq) 2433 struct nfsrv_descript *nfsd; 2434 struct nfssvc_sock *slp; 2435 struct proc *procp; 2436 struct mbuf **mrq; 2437 { 2438 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2439 struct mbuf *nam = nfsd->nd_nam; 2440 caddr_t dpos = nfsd->nd_dpos; 2441 struct ucred *cred = &nfsd->nd_cr; 2442 u_int32_t *tl; 2443 int32_t t1; 2444 caddr_t bpos; 2445 int error = 0, cache, len, dirfor_ret = 1, diraft_ret = 1; 2446 int v3 = (nfsd->nd_flag & ND_NFSV3); 2447 char *cp2; 2448 struct mbuf *mb, *mreq; 2449 struct vnode *vp, *dirp = (struct vnode *)0; 2450 struct vattr dirfor, diraft; 2451 nfsfh_t nfh; 2452 fhandle_t *fhp; 2453 struct nameidata nd; 2454 u_quad_t frev; 2455 struct mount *mp = NULL; 2456 2457 fhp = &nfh.fh_generic; 2458 nfsm_srvmtofh(fhp); 2459 if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) 2460 return (ESTALE); 2461 vn_start_write(NULL, &mp, V_WAIT); 2462 nfsm_srvnamesiz(len); 2463 nd.ni_cnd.cn_cred = cred; 2464 nd.ni_cnd.cn_nameiop = DELETE; 2465 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 2466 error = nfs_namei(&nd, fhp, len, slp, nam, &md, &dpos, 2467 &dirp, procp, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2468 if (dirp) { 2469 if (v3) 2470 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, 2471 procp); 2472 else { 2473 vrele(dirp); 2474 dirp = (struct vnode *)0; 2475 } 2476 } 2477 if (error) { 2478 nfsm_reply(NFSX_WCCDATA(v3)); 2479 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2480 if (dirp) 2481 vrele(dirp); 2482 vn_finished_write(mp, 0); 2483 return (0); 2484 } 2485 vp = nd.ni_vp; 2486 if (vp->v_type != VDIR) { 2487 error = ENOTDIR; 2488 goto out; 2489 } 2490 /* 2491 * No rmdir "." please. 2492 */ 2493 if (nd.ni_dvp == vp) { 2494 error = EINVAL; 2495 goto out; 2496 } 2497 /* 2498 * The root of a mounted filesystem cannot be deleted. 2499 */ 2500 if (vp->v_flag & VROOT) 2501 error = EBUSY; 2502 out: 2503 if (!error) { 2504 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2505 nqsrv_getl(vp, ND_WRITE); 2506 error = VOP_RMDIR(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); 2507 } else { 2508 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2509 if (nd.ni_dvp == nd.ni_vp) 2510 vrele(nd.ni_dvp); 2511 else 2512 vput(nd.ni_dvp); 2513 vput(vp); 2514 } 2515 if (dirp) { 2516 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, procp); 2517 vrele(dirp); 2518 } 2519 nfsm_reply(NFSX_WCCDATA(v3)); 2520 if (v3) { 2521 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2522 vn_finished_write(mp, 0); 2523 return (0); 2524 } 2525 vn_finished_write(mp, 0); 2526 nfsm_srvdone; 2527 } 2528 2529 /* 2530 * nfs readdir service 2531 * - mallocs what it thinks is enough to read 2532 * count rounded up to a multiple of NFS_DIRBLKSIZ <= NFS_MAXREADDIR 2533 * - calls VOP_READDIR() 2534 * - loops around building the reply 2535 * if the output generated exceeds count break out of loop 2536 * The nfsm_clget macro is used here so that the reply will be packed 2537 * tightly in mbuf clusters. 2538 * - it only knows that it has encountered eof when the VOP_READDIR() 2539 * reads nothing 2540 * - as such one readdir rpc will return eof false although you are there 2541 * and then the next will return eof 2542 * - it trims out records with d_fileno == 0 2543 * this doesn't matter for Unix clients, but they might confuse clients 2544 * for other os'. 2545 * - it trims out records with d_type == DT_WHT 2546 * these cannot be seen through NFS (unless we extend the protocol) 2547 * NB: It is tempting to set eof to true if the VOP_READDIR() reads less 2548 * than requested, but this may not apply to all filesystems. For 2549 * example, client NFS does not { although it is never remote mounted 2550 * anyhow } 2551 * The alternate call nfsrv_readdirplus() does lookups as well. 2552 * PS: The NFS protocol spec. does not clarify what the "count" byte 2553 * argument is a count of.. just name strings and file id's or the 2554 * entire reply rpc or ... 2555 * I tried just file name and id sizes and it confused the Sun client, 2556 * so I am using the full rpc size now. The "paranoia.." comment refers 2557 * to including the status longwords that are not a part of the dir. 2558 * "entry" structures, but are in the rpc. 2559 */ 2560 struct flrep { 2561 nfsuint64 fl_off; 2562 u_int32_t fl_postopok; 2563 u_int32_t fl_fattr[NFSX_V3FATTR / sizeof (u_int32_t)]; 2564 u_int32_t fl_fhok; 2565 u_int32_t fl_fhsize; 2566 u_int32_t fl_nfh[NFSX_V3FH / sizeof (u_int32_t)]; 2567 }; 2568 2569 int 2570 nfsrv_readdir(nfsd, slp, procp, mrq) 2571 struct nfsrv_descript *nfsd; 2572 struct nfssvc_sock *slp; 2573 struct proc *procp; 2574 struct mbuf **mrq; 2575 { 2576 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2577 struct mbuf *nam = nfsd->nd_nam; 2578 caddr_t dpos = nfsd->nd_dpos; 2579 struct ucred *cred = &nfsd->nd_cr; 2580 char *bp, *be; 2581 struct mbuf *mp; 2582 struct dirent *dp; 2583 caddr_t cp; 2584 u_int32_t *tl; 2585 int32_t t1; 2586 caddr_t bpos; 2587 struct mbuf *mb, *mreq, *mp2; 2588 char *cpos, *cend, *cp2, *rbuf; 2589 struct vnode *vp; 2590 struct vattr at; 2591 nfsfh_t nfh; 2592 fhandle_t *fhp; 2593 struct uio io; 2594 struct iovec iv; 2595 int len, nlen, rem, xfer, tsiz, i, error = 0, getret = 1; 2596 int siz, cnt, fullsiz, eofflag, rdonly, cache, ncookies; 2597 int v3 = (nfsd->nd_flag & ND_NFSV3); 2598 u_quad_t frev, off, toff, verf; 2599 off_t *cookies = NULL, *cookiep; 2600 nfsuint64 jar; 2601 2602 fhp = &nfh.fh_generic; 2603 nfsm_srvmtofh(fhp); 2604 if (v3) { 2605 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 2606 toff = fxdr_hyper(tl); 2607 tl += 2; 2608 verf = fxdr_hyper(tl); 2609 tl += 2; 2610 } else { 2611 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2612 toff = fxdr_unsigned(u_quad_t, *tl++); 2613 } 2614 off = toff; 2615 cnt = fxdr_unsigned(int, *tl); 2616 siz = ((cnt + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1)); 2617 xfer = NFS_SRVMAXDATA(nfsd); 2618 if (siz > xfer) 2619 siz = xfer; 2620 fullsiz = siz; 2621 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 2622 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2623 if (!error && vp->v_type != VDIR) { 2624 error = ENOTDIR; 2625 vput(vp); 2626 } 2627 if (error) { 2628 nfsm_reply(NFSX_UNSIGNED); 2629 nfsm_srvpostop_attr(getret, &at); 2630 return (0); 2631 } 2632 nqsrv_getl(vp, ND_READ); 2633 if (v3) { 2634 error = getret = VOP_GETATTR(vp, &at, cred, procp); 2635 #ifdef NFS3_STRICTVERF 2636 /* 2637 * XXX This check is too strict for Solaris 2.5 clients. 2638 */ 2639 if (!error && toff && verf != at.va_filerev) 2640 error = NFSERR_BAD_COOKIE; 2641 #endif 2642 } 2643 if (!error) 2644 error = nfsrv_access(vp, VEXEC, cred, rdonly, procp, 0); 2645 if (error) { 2646 vput(vp); 2647 nfsm_reply(NFSX_POSTOPATTR(v3)); 2648 nfsm_srvpostop_attr(getret, &at); 2649 return (0); 2650 } 2651 VOP_UNLOCK(vp, 0); 2652 rbuf = malloc(siz, M_TEMP, M_WAITOK); 2653 again: 2654 iv.iov_base = rbuf; 2655 iv.iov_len = fullsiz; 2656 io.uio_iov = &iv; 2657 io.uio_iovcnt = 1; 2658 io.uio_offset = (off_t)off; 2659 io.uio_resid = fullsiz; 2660 io.uio_segflg = UIO_SYSSPACE; 2661 io.uio_rw = UIO_READ; 2662 io.uio_procp = NULL; 2663 eofflag = 0; 2664 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2665 2666 error = VOP_READDIR(vp, &io, cred, &eofflag, &cookies, &ncookies); 2667 2668 off = (off_t)io.uio_offset; 2669 if (!cookies && !error) 2670 error = NFSERR_PERM; 2671 if (v3) { 2672 getret = VOP_GETATTR(vp, &at, cred, procp); 2673 if (!error) 2674 error = getret; 2675 } 2676 2677 VOP_UNLOCK(vp, 0); 2678 if (error) { 2679 vrele(vp); 2680 free((caddr_t)rbuf, M_TEMP); 2681 if (cookies) 2682 free((caddr_t)cookies, M_TEMP); 2683 nfsm_reply(NFSX_POSTOPATTR(v3)); 2684 nfsm_srvpostop_attr(getret, &at); 2685 return (0); 2686 } 2687 if (io.uio_resid) { 2688 siz -= io.uio_resid; 2689 2690 /* 2691 * If nothing read, return eof 2692 * rpc reply 2693 */ 2694 if (siz == 0) { 2695 vrele(vp); 2696 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_COOKIEVERF(v3) + 2697 2 * NFSX_UNSIGNED); 2698 if (v3) { 2699 nfsm_srvpostop_attr(getret, &at); 2700 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 2701 txdr_hyper(at.va_filerev, tl); 2702 tl += 2; 2703 } else 2704 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2705 *tl++ = nfs_false; 2706 *tl = nfs_true; 2707 free((caddr_t)rbuf, M_TEMP); 2708 free((caddr_t)cookies, M_TEMP); 2709 return (0); 2710 } 2711 } 2712 2713 /* 2714 * Check for degenerate cases of nothing useful read. 2715 * If so go try again 2716 */ 2717 cpos = rbuf; 2718 cend = rbuf + siz; 2719 dp = (struct dirent *)cpos; 2720 cookiep = cookies; 2721 2722 while (cpos < cend && ncookies > 0 && 2723 (dp->d_fileno == 0 || dp->d_type == DT_WHT)) { 2724 cpos += dp->d_reclen; 2725 dp = (struct dirent *)cpos; 2726 cookiep++; 2727 ncookies--; 2728 } 2729 if (cpos >= cend || ncookies == 0) { 2730 toff = off; 2731 siz = fullsiz; 2732 goto again; 2733 } 2734 2735 len = 3 * NFSX_UNSIGNED; /* paranoia, probably can be 0 */ 2736 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_COOKIEVERF(v3) + siz); 2737 if (v3) { 2738 nfsm_srvpostop_attr(getret, &at); 2739 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2740 txdr_hyper(at.va_filerev, tl); 2741 } 2742 mp = mp2 = mb; 2743 bp = bpos; 2744 be = bp + M_TRAILINGSPACE(mp); 2745 2746 /* Loop through the records and build reply */ 2747 while (cpos < cend && ncookies > 0) { 2748 if (dp->d_fileno != 0 && dp->d_type != DT_WHT) { 2749 nlen = dp->d_namlen; 2750 rem = nfsm_rndup(nlen)-nlen; 2751 len += (4 * NFSX_UNSIGNED + nlen + rem); 2752 if (v3) 2753 len += 2 * NFSX_UNSIGNED; 2754 if (len > cnt) { 2755 eofflag = 0; 2756 break; 2757 } 2758 /* 2759 * Build the directory record xdr from 2760 * the dirent entry. 2761 */ 2762 nfsm_clget; 2763 *tl = nfs_true; 2764 bp += NFSX_UNSIGNED; 2765 if (v3) { 2766 nfsm_clget; 2767 *tl = 0; 2768 bp += NFSX_UNSIGNED; 2769 } 2770 nfsm_clget; 2771 *tl = txdr_unsigned(dp->d_fileno); 2772 bp += NFSX_UNSIGNED; 2773 nfsm_clget; 2774 *tl = txdr_unsigned(nlen); 2775 bp += NFSX_UNSIGNED; 2776 2777 /* And loop around copying the name */ 2778 xfer = nlen; 2779 cp = dp->d_name; 2780 while (xfer > 0) { 2781 nfsm_clget; 2782 if ((bp+xfer) > be) 2783 tsiz = be-bp; 2784 else 2785 tsiz = xfer; 2786 memcpy(bp, cp, tsiz); 2787 bp += tsiz; 2788 xfer -= tsiz; 2789 if (xfer > 0) 2790 cp += tsiz; 2791 } 2792 /* And null pad to an int32_t boundary */ 2793 for (i = 0; i < rem; i++) 2794 *bp++ = '\0'; 2795 nfsm_clget; 2796 2797 /* Finish off the record */ 2798 txdr_hyper(*cookiep, &jar); 2799 if (v3) { 2800 *tl = jar.nfsuquad[0]; 2801 bp += NFSX_UNSIGNED; 2802 nfsm_clget; 2803 } 2804 *tl = jar.nfsuquad[1]; 2805 bp += NFSX_UNSIGNED; 2806 } 2807 cpos += dp->d_reclen; 2808 dp = (struct dirent *)cpos; 2809 cookiep++; 2810 ncookies--; 2811 } 2812 vrele(vp); 2813 nfsm_clget; 2814 *tl = nfs_false; 2815 bp += NFSX_UNSIGNED; 2816 nfsm_clget; 2817 if (eofflag) 2818 *tl = nfs_true; 2819 else 2820 *tl = nfs_false; 2821 bp += NFSX_UNSIGNED; 2822 if (mp != mb) { 2823 if (bp < be) 2824 mp->m_len = bp - mtod(mp, caddr_t); 2825 } else 2826 mp->m_len += bp - bpos; 2827 free((caddr_t)rbuf, M_TEMP); 2828 free((caddr_t)cookies, M_TEMP); 2829 nfsm_srvdone; 2830 } 2831 2832 int 2833 nfsrv_readdirplus(nfsd, slp, procp, mrq) 2834 struct nfsrv_descript *nfsd; 2835 struct nfssvc_sock *slp; 2836 struct proc *procp; 2837 struct mbuf **mrq; 2838 { 2839 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2840 struct mbuf *nam = nfsd->nd_nam; 2841 caddr_t dpos = nfsd->nd_dpos; 2842 struct ucred *cred = &nfsd->nd_cr; 2843 char *bp, *be; 2844 struct mbuf *mp; 2845 struct dirent *dp; 2846 caddr_t cp; 2847 u_int32_t *tl; 2848 int32_t t1; 2849 caddr_t bpos; 2850 struct mbuf *mb, *mreq, *mp2; 2851 char *cpos, *cend, *cp2, *rbuf; 2852 struct vnode *vp, *nvp; 2853 struct flrep fl; 2854 nfsfh_t nfh; 2855 fhandle_t *fhp, *nfhp = (fhandle_t *)fl.fl_nfh; 2856 struct uio io; 2857 struct iovec iv; 2858 struct vattr va, at, *vap = &va; 2859 struct nfs_fattr *fp; 2860 int len, nlen, rem, xfer, tsiz, i, error = 0, getret = 1; 2861 int siz, cnt, fullsiz, eofflag, rdonly, cache, dirlen, ncookies; 2862 u_quad_t frev, off, toff, verf; 2863 off_t *cookies = NULL, *cookiep; 2864 2865 fhp = &nfh.fh_generic; 2866 nfsm_srvmtofh(fhp); 2867 nfsm_dissect(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 2868 toff = fxdr_hyper(tl); 2869 tl += 2; 2870 verf = fxdr_hyper(tl); 2871 tl += 2; 2872 siz = fxdr_unsigned(int, *tl++); 2873 cnt = fxdr_unsigned(int, *tl); 2874 off = toff; 2875 siz = ((siz + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1)); 2876 xfer = NFS_SRVMAXDATA(nfsd); 2877 if (siz > xfer) 2878 siz = xfer; 2879 fullsiz = siz; 2880 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 2881 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 2882 if (!error && vp->v_type != VDIR) { 2883 error = ENOTDIR; 2884 vput(vp); 2885 } 2886 if (error) { 2887 nfsm_reply(NFSX_UNSIGNED); 2888 nfsm_srvpostop_attr(getret, &at); 2889 return (0); 2890 } 2891 error = getret = VOP_GETATTR(vp, &at, cred, procp); 2892 #ifdef NFS3_STRICTVERF 2893 /* 2894 * XXX This check is too strict for Solaris 2.5 clients. 2895 */ 2896 if (!error && toff && verf != at.va_filerev) 2897 error = NFSERR_BAD_COOKIE; 2898 #endif 2899 if (!error) { 2900 nqsrv_getl(vp, ND_READ); 2901 error = nfsrv_access(vp, VEXEC, cred, rdonly, procp, 0); 2902 } 2903 if (error) { 2904 vput(vp); 2905 nfsm_reply(NFSX_V3POSTOPATTR); 2906 nfsm_srvpostop_attr(getret, &at); 2907 return (0); 2908 } 2909 VOP_UNLOCK(vp, 0); 2910 2911 rbuf = malloc(siz, M_TEMP, M_WAITOK); 2912 again: 2913 iv.iov_base = rbuf; 2914 iv.iov_len = fullsiz; 2915 io.uio_iov = &iv; 2916 io.uio_iovcnt = 1; 2917 io.uio_offset = (off_t)off; 2918 io.uio_resid = fullsiz; 2919 io.uio_segflg = UIO_SYSSPACE; 2920 io.uio_rw = UIO_READ; 2921 io.uio_procp = NULL; 2922 eofflag = 0; 2923 2924 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2925 2926 error = VOP_READDIR(vp, &io, cred, &eofflag, &cookies, &ncookies); 2927 2928 off = (u_quad_t)io.uio_offset; 2929 getret = VOP_GETATTR(vp, &at, cred, procp); 2930 2931 VOP_UNLOCK(vp, 0); 2932 2933 /* 2934 * If the VGET operation doesn't work for this filesystem, 2935 * we can't support readdirplus. Returning NOTSUPP should 2936 * make clients fall back to plain readdir. 2937 * There's no need to check for VPTOFH as well, we wouldn't 2938 * even be here otherwise. 2939 */ 2940 if (!getret) { 2941 if ((getret = VFS_VGET(vp->v_mount, at.va_fileid, &nvp))) 2942 getret = (getret == EOPNOTSUPP) ? 2943 NFSERR_NOTSUPP : NFSERR_IO; 2944 else 2945 vput(nvp); 2946 } 2947 2948 if (!cookies && !error) 2949 error = NFSERR_PERM; 2950 if (!error) 2951 error = getret; 2952 if (error) { 2953 vrele(vp); 2954 if (cookies) 2955 free((caddr_t)cookies, M_TEMP); 2956 free((caddr_t)rbuf, M_TEMP); 2957 nfsm_reply(NFSX_V3POSTOPATTR); 2958 nfsm_srvpostop_attr(getret, &at); 2959 return (0); 2960 } 2961 if (io.uio_resid) { 2962 siz -= io.uio_resid; 2963 2964 /* 2965 * If nothing read, return eof 2966 * rpc reply 2967 */ 2968 if (siz == 0) { 2969 vrele(vp); 2970 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF + 2971 2 * NFSX_UNSIGNED); 2972 nfsm_srvpostop_attr(getret, &at); 2973 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 2974 txdr_hyper(at.va_filerev, tl); 2975 tl += 2; 2976 *tl++ = nfs_false; 2977 *tl = nfs_true; 2978 free((caddr_t)cookies, M_TEMP); 2979 free((caddr_t)rbuf, M_TEMP); 2980 return (0); 2981 } 2982 } 2983 2984 /* 2985 * Check for degenerate cases of nothing useful read. 2986 * If so go try again 2987 */ 2988 cpos = rbuf; 2989 cend = rbuf + siz; 2990 dp = (struct dirent *)cpos; 2991 cookiep = cookies; 2992 2993 while (cpos < cend && ncookies > 0 && 2994 (dp->d_fileno == 0 || dp->d_type == DT_WHT)) { 2995 cpos += dp->d_reclen; 2996 dp = (struct dirent *)cpos; 2997 cookiep++; 2998 ncookies--; 2999 } 3000 if (cpos >= cend || ncookies == 0) { 3001 toff = off; 3002 siz = fullsiz; 3003 goto again; 3004 } 3005 3006 dirlen = len = NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF + 2 * NFSX_UNSIGNED; 3007 nfsm_reply(cnt); 3008 nfsm_srvpostop_attr(getret, &at); 3009 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 3010 txdr_hyper(at.va_filerev, tl); 3011 mp = mp2 = mb; 3012 bp = bpos; 3013 be = bp + M_TRAILINGSPACE(mp); 3014 3015 /* Loop through the records and build reply */ 3016 while (cpos < cend && ncookies > 0) { 3017 if (dp->d_fileno != 0 && dp->d_type != DT_WHT) { 3018 nlen = dp->d_namlen; 3019 rem = nfsm_rndup(nlen)-nlen; 3020 3021 /* 3022 * For readdir_and_lookup get the vnode using 3023 * the file number. 3024 */ 3025 if (VFS_VGET(vp->v_mount, dp->d_fileno, &nvp)) 3026 goto invalid; 3027 memset((caddr_t)nfhp, 0, NFSX_V3FH); 3028 nfhp->fh_fsid = 3029 nvp->v_mount->mnt_stat.f_fsidx; 3030 if (VFS_VPTOFH(nvp, &nfhp->fh_fid)) { 3031 vput(nvp); 3032 goto invalid; 3033 } 3034 if (VOP_GETATTR(nvp, vap, cred, procp)) { 3035 vput(nvp); 3036 goto invalid; 3037 } 3038 vput(nvp); 3039 3040 /* 3041 * If either the dircount or maxcount will be 3042 * exceeded, get out now. Both of these lengths 3043 * are calculated conservatively, including all 3044 * XDR overheads. 3045 */ 3046 len += (8 * NFSX_UNSIGNED + nlen + rem + NFSX_V3FH + 3047 NFSX_V3POSTOPATTR); 3048 dirlen += (6 * NFSX_UNSIGNED + nlen + rem); 3049 if (len > cnt || dirlen > fullsiz) { 3050 eofflag = 0; 3051 break; 3052 } 3053 3054 /* 3055 * Build the directory record xdr from 3056 * the dirent entry. 3057 */ 3058 fp = (struct nfs_fattr *)&fl.fl_fattr; 3059 nfsm_srvfillattr(vap, fp); 3060 fl.fl_fhsize = txdr_unsigned(NFSX_V3FH); 3061 fl.fl_fhok = nfs_true; 3062 fl.fl_postopok = nfs_true; 3063 txdr_hyper(*cookiep, fl.fl_off.nfsuquad); 3064 3065 nfsm_clget; 3066 *tl = nfs_true; 3067 bp += NFSX_UNSIGNED; 3068 nfsm_clget; 3069 *tl = 0; 3070 bp += NFSX_UNSIGNED; 3071 nfsm_clget; 3072 *tl = txdr_unsigned(dp->d_fileno); 3073 bp += NFSX_UNSIGNED; 3074 nfsm_clget; 3075 *tl = txdr_unsigned(nlen); 3076 bp += NFSX_UNSIGNED; 3077 3078 /* And loop around copying the name */ 3079 xfer = nlen; 3080 cp = dp->d_name; 3081 while (xfer > 0) { 3082 nfsm_clget; 3083 if ((bp + xfer) > be) 3084 tsiz = be - bp; 3085 else 3086 tsiz = xfer; 3087 memcpy(bp, cp, tsiz); 3088 bp += tsiz; 3089 xfer -= tsiz; 3090 if (xfer > 0) 3091 cp += tsiz; 3092 } 3093 /* And null pad to an int32_t boundary */ 3094 for (i = 0; i < rem; i++) 3095 *bp++ = '\0'; 3096 3097 /* 3098 * Now copy the flrep structure out. 3099 */ 3100 xfer = sizeof (struct flrep); 3101 cp = (caddr_t)&fl; 3102 while (xfer > 0) { 3103 nfsm_clget; 3104 if ((bp + xfer) > be) 3105 tsiz = be - bp; 3106 else 3107 tsiz = xfer; 3108 memcpy(bp, cp, tsiz); 3109 bp += tsiz; 3110 xfer -= tsiz; 3111 if (xfer > 0) 3112 cp += tsiz; 3113 } 3114 } 3115 invalid: 3116 cpos += dp->d_reclen; 3117 dp = (struct dirent *)cpos; 3118 cookiep++; 3119 ncookies--; 3120 } 3121 vrele(vp); 3122 nfsm_clget; 3123 *tl = nfs_false; 3124 bp += NFSX_UNSIGNED; 3125 nfsm_clget; 3126 if (eofflag) 3127 *tl = nfs_true; 3128 else 3129 *tl = nfs_false; 3130 bp += NFSX_UNSIGNED; 3131 if (mp != mb) { 3132 if (bp < be) 3133 mp->m_len = bp - mtod(mp, caddr_t); 3134 } else 3135 mp->m_len += bp - bpos; 3136 free((caddr_t)cookies, M_TEMP); 3137 free((caddr_t)rbuf, M_TEMP); 3138 nfsm_srvdone; 3139 } 3140 3141 /* 3142 * nfs commit service 3143 */ 3144 int 3145 nfsrv_commit(nfsd, slp, procp, mrq) 3146 struct nfsrv_descript *nfsd; 3147 struct nfssvc_sock *slp; 3148 struct proc *procp; 3149 struct mbuf **mrq; 3150 { 3151 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3152 struct mbuf *nam = nfsd->nd_nam; 3153 caddr_t dpos = nfsd->nd_dpos; 3154 struct ucred *cred = &nfsd->nd_cr; 3155 struct vattr bfor, aft; 3156 struct vnode *vp; 3157 nfsfh_t nfh; 3158 fhandle_t *fhp; 3159 u_int32_t *tl; 3160 int32_t t1; 3161 caddr_t bpos; 3162 int error = 0, rdonly, for_ret = 1, aft_ret = 1, cache; 3163 uint32_t cnt; 3164 char *cp2; 3165 struct mbuf *mb, *mreq; 3166 u_quad_t frev, off, end; 3167 struct mount *mp = NULL; 3168 3169 #ifndef nolint 3170 cache = 0; 3171 #endif 3172 fhp = &nfh.fh_generic; 3173 nfsm_srvmtofh(fhp); 3174 if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) 3175 return (ESTALE); 3176 vn_start_write(NULL, &mp, V_WAIT); 3177 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 3178 3179 off = fxdr_hyper(tl); 3180 tl += 2; 3181 cnt = fxdr_unsigned(uint32_t, *tl); 3182 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 3183 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 3184 if (error) { 3185 nfsm_reply(2 * NFSX_UNSIGNED); 3186 nfsm_srvwcc_data(for_ret, &bfor, aft_ret, &aft); 3187 vn_finished_write(mp, 0); 3188 return (0); 3189 } 3190 for_ret = VOP_GETATTR(vp, &bfor, cred, procp); 3191 end = (cnt > 0) ? off + cnt : vp->v_size; 3192 if (end < off || end > vp->v_size) 3193 end = vp->v_size; 3194 if (off < vp->v_size) 3195 error = VOP_FSYNC(vp, cred, FSYNC_WAIT, off, end, procp); 3196 /* else error == 0, from nfsrv_fhtovp() */ 3197 aft_ret = VOP_GETATTR(vp, &aft, cred, procp); 3198 vput(vp); 3199 nfsm_reply(NFSX_V3WCCDATA + NFSX_V3WRITEVERF); 3200 nfsm_srvwcc_data(for_ret, &bfor, aft_ret, &aft); 3201 if (!error) { 3202 nfsm_build(tl, u_int32_t *, NFSX_V3WRITEVERF); 3203 *tl++ = txdr_unsigned(boottime.tv_sec); 3204 *tl = txdr_unsigned(boottime.tv_usec); 3205 } else { 3206 vn_finished_write(mp, 0); 3207 return (0); 3208 } 3209 vn_finished_write(mp, 0); 3210 nfsm_srvdone; 3211 } 3212 3213 /* 3214 * nfs statfs service 3215 */ 3216 int 3217 nfsrv_statfs(nfsd, slp, procp, mrq) 3218 struct nfsrv_descript *nfsd; 3219 struct nfssvc_sock *slp; 3220 struct proc *procp; 3221 struct mbuf **mrq; 3222 { 3223 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3224 struct mbuf *nam = nfsd->nd_nam; 3225 caddr_t dpos = nfsd->nd_dpos; 3226 struct ucred *cred = &nfsd->nd_cr; 3227 struct statvfs *sf; 3228 struct nfs_statfs *sfp; 3229 u_int32_t *tl; 3230 int32_t t1; 3231 caddr_t bpos; 3232 int error = 0, rdonly, cache, getret = 1; 3233 int v3 = (nfsd->nd_flag & ND_NFSV3); 3234 char *cp2; 3235 struct mbuf *mb, *mreq; 3236 struct vnode *vp; 3237 struct vattr at; 3238 nfsfh_t nfh; 3239 fhandle_t *fhp; 3240 struct statvfs statvfs; 3241 u_quad_t frev, tval; 3242 3243 #ifndef nolint 3244 cache = 0; 3245 #endif 3246 fhp = &nfh.fh_generic; 3247 nfsm_srvmtofh(fhp); 3248 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 3249 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 3250 if (error) { 3251 nfsm_reply(NFSX_UNSIGNED); 3252 nfsm_srvpostop_attr(getret, &at); 3253 return (0); 3254 } 3255 sf = &statvfs; 3256 error = VFS_STATVFS(vp->v_mount, sf, procp); 3257 getret = VOP_GETATTR(vp, &at, cred, procp); 3258 vput(vp); 3259 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_STATFS(v3)); 3260 if (v3) 3261 nfsm_srvpostop_attr(getret, &at); 3262 if (error) 3263 return (0); 3264 nfsm_build(sfp, struct nfs_statfs *, NFSX_STATFS(v3)); 3265 if (v3) { 3266 tval = (u_quad_t)((quad_t)sf->f_blocks * (quad_t)sf->f_frsize); 3267 txdr_hyper(tval, &sfp->sf_tbytes); 3268 tval = (u_quad_t)((quad_t)sf->f_bfree * (quad_t)sf->f_frsize); 3269 txdr_hyper(tval, &sfp->sf_fbytes); 3270 tval = (u_quad_t)((quad_t)sf->f_bavail * (quad_t)sf->f_frsize); 3271 txdr_hyper(tval, &sfp->sf_abytes); 3272 tval = (u_quad_t)sf->f_files; 3273 txdr_hyper(tval, &sfp->sf_tfiles); 3274 tval = (u_quad_t)sf->f_ffree; 3275 txdr_hyper(tval, &sfp->sf_ffiles); 3276 txdr_hyper(tval, &sfp->sf_afiles); 3277 sfp->sf_invarsec = 0; 3278 } else { 3279 sfp->sf_tsize = txdr_unsigned(NFS_MAXDGRAMDATA); 3280 sfp->sf_bsize = txdr_unsigned(sf->f_frsize); 3281 sfp->sf_blocks = txdr_unsigned(sf->f_blocks); 3282 sfp->sf_bfree = txdr_unsigned(sf->f_bfree); 3283 sfp->sf_bavail = txdr_unsigned(sf->f_bavail); 3284 } 3285 nfsm_srvdone; 3286 } 3287 3288 /* 3289 * nfs fsinfo service 3290 */ 3291 int 3292 nfsrv_fsinfo(nfsd, slp, procp, mrq) 3293 struct nfsrv_descript *nfsd; 3294 struct nfssvc_sock *slp; 3295 struct proc *procp; 3296 struct mbuf **mrq; 3297 { 3298 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3299 struct mbuf *nam = nfsd->nd_nam; 3300 caddr_t dpos = nfsd->nd_dpos; 3301 struct ucred *cred = &nfsd->nd_cr; 3302 u_int32_t *tl; 3303 struct nfsv3_fsinfo *sip; 3304 int32_t t1; 3305 caddr_t bpos; 3306 int error = 0, rdonly, cache, getret = 1; 3307 uint32_t maxdata; 3308 char *cp2; 3309 struct mbuf *mb, *mreq; 3310 struct vnode *vp; 3311 struct vattr at; 3312 nfsfh_t nfh; 3313 fhandle_t *fhp; 3314 u_quad_t frev, maxfsize; 3315 struct statvfs sb; 3316 3317 #ifndef nolint 3318 cache = 0; 3319 #endif 3320 fhp = &nfh.fh_generic; 3321 nfsm_srvmtofh(fhp); 3322 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 3323 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 3324 if (error) { 3325 nfsm_reply(NFSX_UNSIGNED); 3326 nfsm_srvpostop_attr(getret, &at); 3327 return (0); 3328 } 3329 3330 /* XXX Try to make a guess on the max file size. */ 3331 VFS_STATVFS(vp->v_mount, &sb, (struct proc *)0); 3332 maxfsize = (u_quad_t)0x80000000 * sb.f_frsize - 1; 3333 3334 getret = VOP_GETATTR(vp, &at, cred, procp); 3335 vput(vp); 3336 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3FSINFO); 3337 nfsm_srvpostop_attr(getret, &at); 3338 nfsm_build(sip, struct nfsv3_fsinfo *, NFSX_V3FSINFO); 3339 3340 /* 3341 * XXX 3342 * There should be file system VFS OP(s) to get this information. 3343 * For now, assume ufs. 3344 */ 3345 if (slp->ns_so->so_type == SOCK_DGRAM) 3346 maxdata = NFS_MAXDGRAMDATA; 3347 else 3348 maxdata = NFS_MAXDATA; 3349 sip->fs_rtmax = txdr_unsigned(maxdata); 3350 sip->fs_rtpref = txdr_unsigned(maxdata); 3351 sip->fs_rtmult = txdr_unsigned(NFS_FABLKSIZE); 3352 sip->fs_wtmax = txdr_unsigned(maxdata); 3353 sip->fs_wtpref = txdr_unsigned(maxdata); 3354 sip->fs_wtmult = txdr_unsigned(NFS_FABLKSIZE); 3355 sip->fs_dtpref = txdr_unsigned(maxdata); 3356 txdr_hyper(maxfsize, &sip->fs_maxfilesize); 3357 sip->fs_timedelta.nfsv3_sec = 0; 3358 sip->fs_timedelta.nfsv3_nsec = txdr_unsigned(1); 3359 sip->fs_properties = txdr_unsigned(NFSV3FSINFO_LINK | 3360 NFSV3FSINFO_SYMLINK | NFSV3FSINFO_HOMOGENEOUS | 3361 NFSV3FSINFO_CANSETTIME); 3362 nfsm_srvdone; 3363 } 3364 3365 /* 3366 * nfs pathconf service 3367 */ 3368 int 3369 nfsrv_pathconf(nfsd, slp, procp, mrq) 3370 struct nfsrv_descript *nfsd; 3371 struct nfssvc_sock *slp; 3372 struct proc *procp; 3373 struct mbuf **mrq; 3374 { 3375 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3376 struct mbuf *nam = nfsd->nd_nam; 3377 caddr_t dpos = nfsd->nd_dpos; 3378 struct ucred *cred = &nfsd->nd_cr; 3379 u_int32_t *tl; 3380 struct nfsv3_pathconf *pc; 3381 int32_t t1; 3382 caddr_t bpos; 3383 int error = 0, rdonly, cache, getret = 1; 3384 register_t linkmax, namemax, chownres, notrunc; 3385 char *cp2; 3386 struct mbuf *mb, *mreq; 3387 struct vnode *vp; 3388 struct vattr at; 3389 nfsfh_t nfh; 3390 fhandle_t *fhp; 3391 u_quad_t frev; 3392 3393 #ifndef nolint 3394 cache = 0; 3395 #endif 3396 fhp = &nfh.fh_generic; 3397 nfsm_srvmtofh(fhp); 3398 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, 3399 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), FALSE); 3400 if (error) { 3401 nfsm_reply(NFSX_UNSIGNED); 3402 nfsm_srvpostop_attr(getret, &at); 3403 return (0); 3404 } 3405 error = VOP_PATHCONF(vp, _PC_LINK_MAX, &linkmax); 3406 if (!error) 3407 error = VOP_PATHCONF(vp, _PC_NAME_MAX, &namemax); 3408 if (!error) 3409 error = VOP_PATHCONF(vp, _PC_CHOWN_RESTRICTED, &chownres); 3410 if (!error) 3411 error = VOP_PATHCONF(vp, _PC_NO_TRUNC, ¬runc); 3412 getret = VOP_GETATTR(vp, &at, cred, procp); 3413 vput(vp); 3414 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3PATHCONF); 3415 nfsm_srvpostop_attr(getret, &at); 3416 if (error) 3417 return (0); 3418 nfsm_build(pc, struct nfsv3_pathconf *, NFSX_V3PATHCONF); 3419 3420 pc->pc_linkmax = txdr_unsigned(linkmax); 3421 pc->pc_namemax = txdr_unsigned(namemax); 3422 pc->pc_notrunc = txdr_unsigned(notrunc); 3423 pc->pc_chownrestricted = txdr_unsigned(chownres); 3424 3425 /* 3426 * These should probably be supported by VOP_PATHCONF(), but 3427 * until msdosfs is exportable (why would you want to?), the 3428 * Unix defaults should be ok. 3429 */ 3430 pc->pc_caseinsensitive = nfs_false; 3431 pc->pc_casepreserving = nfs_true; 3432 nfsm_srvdone; 3433 } 3434 3435 /* 3436 * Null operation, used by clients to ping server 3437 */ 3438 /* ARGSUSED */ 3439 int 3440 nfsrv_null(nfsd, slp, procp, mrq) 3441 struct nfsrv_descript *nfsd; 3442 struct nfssvc_sock *slp; 3443 struct proc *procp; 3444 struct mbuf **mrq; 3445 { 3446 struct mbuf *mrep = nfsd->nd_mrep; 3447 caddr_t bpos; 3448 int error = NFSERR_RETVOID, cache = 0; 3449 struct mbuf *mb, *mreq; 3450 u_quad_t frev; 3451 3452 nfsm_reply(0); 3453 return (0); 3454 } 3455 3456 /* 3457 * No operation, used for obsolete procedures 3458 */ 3459 /* ARGSUSED */ 3460 int 3461 nfsrv_noop(nfsd, slp, procp, mrq) 3462 struct nfsrv_descript *nfsd; 3463 struct nfssvc_sock *slp; 3464 struct proc *procp; 3465 struct mbuf **mrq; 3466 { 3467 struct mbuf *mrep = nfsd->nd_mrep; 3468 caddr_t bpos; 3469 int error, cache = 0; 3470 struct mbuf *mb, *mreq; 3471 u_quad_t frev; 3472 3473 if (nfsd->nd_repstat) 3474 error = nfsd->nd_repstat; 3475 else 3476 error = EPROCUNAVAIL; 3477 nfsm_reply(0); 3478 return (0); 3479 } 3480 3481 /* 3482 * Perform access checking for vnodes obtained from file handles that would 3483 * refer to files already opened by a Unix client. You cannot just use 3484 * vn_writechk() and VOP_ACCESS() for two reasons. 3485 * 1 - You must check for exported rdonly as well as MNT_RDONLY for the write case 3486 * 2 - The owner is to be given access irrespective of mode bits for some 3487 * operations, so that processes that chmod after opening a file don't 3488 * break. I don't like this because it opens a security hole, but since 3489 * the nfs server opens a security hole the size of a barn door anyhow, 3490 * what the heck. 3491 * 3492 * The exception to rule 2 is EPERM. If a file is IMMUTABLE, VOP_ACCESS() 3493 * will return EPERM instead of EACCESS. EPERM is always an error. 3494 */ 3495 int 3496 nfsrv_access(vp, flags, cred, rdonly, p, override) 3497 struct vnode *vp; 3498 int flags; 3499 struct ucred *cred; 3500 int rdonly; 3501 struct proc *p; 3502 { 3503 struct vattr vattr; 3504 int error; 3505 if (flags & VWRITE) { 3506 /* Just vn_writechk() changed to check rdonly */ 3507 /* 3508 * Disallow write attempts on read-only file systems; 3509 * unless the file is a socket or a block or character 3510 * device resident on the file system. 3511 */ 3512 if (rdonly || (vp->v_mount->mnt_flag & MNT_RDONLY)) { 3513 switch (vp->v_type) { 3514 case VREG: 3515 case VDIR: 3516 case VLNK: 3517 return (EROFS); 3518 default: 3519 break; 3520 } 3521 } 3522 3523 /* 3524 * If the vnode is in use as a process's text, 3525 * we can't allow writing. 3526 */ 3527 if (vp->v_flag & VTEXT) 3528 return (ETXTBSY); 3529 } 3530 error = VOP_GETATTR(vp, &vattr, cred, p); 3531 if (error) 3532 return (error); 3533 error = VOP_ACCESS(vp, flags, cred, p); 3534 /* 3535 * Allow certain operations for the owner (reads and writes 3536 * on files that are already open). 3537 */ 3538 if (override && error == EACCES && cred->cr_uid == vattr.va_uid) 3539 error = 0; 3540 return error; 3541 }
Cache object: 8ae13824dc2accbc48ffd40dbfdbe475
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