1 /* 2 * Copyright (c) 1989 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Rick Macklem at The University of Guelph. 7 * 8 * %sccs.include.redist.c% 9 * 10 * @(#)nfs_serv.c 7.42 (Berkeley) 12/14/91 11 */ 12 13 /* 14 * nfs version 2 server calls to vnode ops 15 * - these routines generally have 3 phases 16 * 1 - break down and validate rpc request in mbuf list 17 * 2 - do the vnode ops for the request 18 * (surprisingly ?? many are very similar to syscalls in vfs_syscalls.c) 19 * 3 - build the rpc reply in an mbuf list 20 * nb: 21 * - do not mix the phases, since the nfsm_?? macros can return failures 22 * on a bad rpc or similar and do not do any vrele() or vput()'s 23 * 24 * - the nfsm_reply() macro generates an nfs rpc reply with the nfs 25 * error number iff error != 0 whereas 26 * returning an error from the server function implies a fatal error 27 * such as a badly constructed rpc request that should be dropped without 28 * a reply. 29 */ 30 31 #include "param.h" 32 #include "proc.h" 33 #include "file.h" 34 #include "namei.h" 35 #include "vnode.h" 36 #include "mount.h" 37 #include "mbuf.h" 38 39 #include "ufs/ufs/quota.h" 40 #include "ufs/ufs/inode.h" 41 #include "ufs/ufs/dir.h" 42 43 #include "nfsv2.h" 44 #include "nfs.h" 45 #include "xdr_subs.h" 46 #include "nfsm_subs.h" 47 48 /* Defs */ 49 #define TRUE 1 50 #define FALSE 0 51 52 /* Global vars */ 53 extern u_long nfs_procids[NFS_NPROCS]; 54 extern u_long nfs_xdrneg1; 55 extern u_long nfs_false, nfs_true; 56 nfstype nfs_type[9]={ NFNON, NFREG, NFDIR, NFBLK, NFCHR, NFLNK, NFNON, 57 NFCHR, NFNON }; 58 59 /* 60 * nfs getattr service 61 */ 62 nfsrv_getattr(mrep, md, dpos, cred, xid, mrq, repstat, p) 63 struct mbuf **mrq; 64 struct mbuf *mrep, *md; 65 caddr_t dpos; 66 struct ucred *cred; 67 u_long xid; 68 int *repstat; 69 struct proc *p; 70 { 71 register struct nfsv2_fattr *fp; 72 struct vattr va; 73 register struct vattr *vap = &va; 74 struct vnode *vp; 75 nfsv2fh_t nfh; 76 fhandle_t *fhp; 77 register u_long *tl; 78 register long t1; 79 caddr_t bpos; 80 int error = 0; 81 char *cp2; 82 struct mbuf *mb, *mb2, *mreq; 83 84 fhp = &nfh.fh_generic; 85 nfsm_srvmtofh(fhp); 86 if (error = nfsrv_fhtovp(fhp, TRUE, &vp, cred)) 87 nfsm_reply(0); 88 error = VOP_GETATTR(vp, vap, cred, p); 89 vput(vp); 90 nfsm_reply(NFSX_FATTR); 91 nfsm_build(fp, struct nfsv2_fattr *, NFSX_FATTR); 92 nfsm_srvfillattr; 93 nfsm_srvdone; 94 } 95 96 /* 97 * nfs setattr service 98 */ 99 nfsrv_setattr(mrep, md, dpos, cred, xid, mrq, repstat, p) 100 struct mbuf **mrq; 101 struct mbuf *mrep, *md; 102 caddr_t dpos; 103 struct ucred *cred; 104 u_long xid; 105 int *repstat; 106 struct proc *p; 107 { 108 struct vattr va; 109 register struct vattr *vap = &va; 110 register struct nfsv2_sattr *sp; 111 register struct nfsv2_fattr *fp; 112 struct vnode *vp; 113 nfsv2fh_t nfh; 114 fhandle_t *fhp; 115 register u_long *tl; 116 register long t1; 117 caddr_t bpos; 118 int error = 0; 119 char *cp2; 120 struct mbuf *mb, *mb2, *mreq; 121 122 fhp = &nfh.fh_generic; 123 nfsm_srvmtofh(fhp); 124 nfsm_disect(sp, struct nfsv2_sattr *, NFSX_SATTR); 125 if (error = nfsrv_fhtovp(fhp, TRUE, &vp, cred)) 126 nfsm_reply(0); 127 if (error = nfsrv_access(vp, VWRITE, cred, p)) 128 goto out; 129 VATTR_NULL(vap); 130 /* 131 * Nah nah nah nah na nah 132 * There is a bug in the Sun client that puts 0xffff in the mode 133 * field of sattr when it should put in 0xffffffff. The u_short 134 * doesn't sign extend. 135 * --> check the low order 2 bytes for 0xffff 136 */ 137 if ((fxdr_unsigned(int, sp->sa_mode) & 0xffff) != 0xffff) 138 vap->va_mode = nfstov_mode(sp->sa_mode); 139 if (sp->sa_uid != nfs_xdrneg1) 140 vap->va_uid = fxdr_unsigned(uid_t, sp->sa_uid); 141 if (sp->sa_gid != nfs_xdrneg1) 142 vap->va_gid = fxdr_unsigned(gid_t, sp->sa_gid); 143 if (sp->sa_size != nfs_xdrneg1) 144 vap->va_size = fxdr_unsigned(u_long, sp->sa_size); 145 /* 146 * The usec field of sa_atime is overloaded with the va_flags field 147 * for 4.4BSD clients. Hopefully other clients always set both the 148 * sec and usec fields to -1 when not setting the atime. 149 */ 150 if (sp->sa_atime.tv_sec != nfs_xdrneg1) { 151 vap->va_atime.tv_sec = fxdr_unsigned(long, sp->sa_atime.tv_sec); 152 vap->va_atime.tv_usec = 0; 153 } 154 if (sp->sa_atime.tv_usec != nfs_xdrneg1) 155 vap->va_flags = fxdr_unsigned(u_long, sp->sa_atime.tv_usec); 156 if (sp->sa_mtime.tv_sec != nfs_xdrneg1) 157 fxdr_time(&sp->sa_mtime, &vap->va_mtime); 158 if (error = VOP_SETATTR(vp, vap, cred, p)) { 159 vput(vp); 160 nfsm_reply(0); 161 } 162 error = VOP_GETATTR(vp, vap, cred, p); 163 out: 164 vput(vp); 165 nfsm_reply(NFSX_FATTR); 166 nfsm_build(fp, struct nfsv2_fattr *, NFSX_FATTR); 167 nfsm_srvfillattr; 168 nfsm_srvdone; 169 } 170 171 /* 172 * nfs lookup rpc 173 */ 174 nfsrv_lookup(mrep, md, dpos, cred, xid, mrq, repstat, p) 175 struct mbuf **mrq; 176 struct mbuf *mrep, *md; 177 caddr_t dpos; 178 struct ucred *cred; 179 u_long xid; 180 int *repstat; 181 struct proc *p; 182 { 183 register struct nfsv2_fattr *fp; 184 struct nameidata nd; 185 struct vnode *vp; 186 nfsv2fh_t nfh; 187 fhandle_t *fhp; 188 register caddr_t cp; 189 register u_long *tl; 190 register long t1; 191 caddr_t bpos; 192 int error = 0; 193 char *cp2; 194 struct mbuf *mb, *mb2, *mreq; 195 long len; 196 struct vattr va, *vap = &va; 197 198 fhp = &nfh.fh_generic; 199 nfsm_srvmtofh(fhp); 200 nfsm_srvstrsiz(len, NFS_MAXNAMLEN); 201 nd.ni_cred = cred; 202 nd.ni_nameiop = LOOKUP | LOCKLEAF; 203 if (error = nfs_namei(&nd, fhp, len, &md, &dpos, p)) 204 nfsm_reply(0); 205 vp = nd.ni_vp; 206 bzero((caddr_t)fhp, sizeof(nfh)); 207 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; 208 if (error = VFS_VPTOFH(vp, &fhp->fh_fid)) { 209 vput(vp); 210 nfsm_reply(0); 211 } 212 error = VOP_GETATTR(vp, vap, cred, p); 213 vput(vp); 214 nfsm_reply(NFSX_FH+NFSX_FATTR); 215 nfsm_srvfhtom(fhp); 216 nfsm_build(fp, struct nfsv2_fattr *, NFSX_FATTR); 217 nfsm_srvfillattr; 218 nfsm_srvdone; 219 } 220 221 /* 222 * nfs readlink service 223 */ 224 nfsrv_readlink(mrep, md, dpos, cred, xid, mrq, repstat, p) 225 struct mbuf **mrq; 226 struct mbuf *mrep, *md; 227 caddr_t dpos; 228 struct ucred *cred; 229 u_long xid; 230 int *repstat; 231 struct proc *p; 232 { 233 struct iovec iv[(NFS_MAXPATHLEN+MLEN-1)/MLEN]; 234 register struct iovec *ivp = iv; 235 register struct mbuf *mp; 236 register u_long *tl; 237 register long t1; 238 caddr_t bpos; 239 int error = 0; 240 char *cp2; 241 struct mbuf *mb, *mb2, *mp2, *mp3, *mreq; 242 struct vnode *vp; 243 nfsv2fh_t nfh; 244 fhandle_t *fhp; 245 struct uio io, *uiop = &io; 246 int i, tlen, len; 247 248 fhp = &nfh.fh_generic; 249 nfsm_srvmtofh(fhp); 250 len = 0; 251 i = 0; 252 while (len < NFS_MAXPATHLEN) { 253 MGET(mp, M_WAIT, MT_DATA); 254 MCLGET(mp, M_WAIT); 255 mp->m_len = NFSMSIZ(mp); 256 if (len == 0) 257 mp3 = mp2 = mp; 258 else { 259 mp2->m_next = mp; 260 mp2 = mp; 261 } 262 if ((len+mp->m_len) > NFS_MAXPATHLEN) { 263 mp->m_len = NFS_MAXPATHLEN-len; 264 len = NFS_MAXPATHLEN; 265 } else 266 len += mp->m_len; 267 ivp->iov_base = mtod(mp, caddr_t); 268 ivp->iov_len = mp->m_len; 269 i++; 270 ivp++; 271 } 272 uiop->uio_iov = iv; 273 uiop->uio_iovcnt = i; 274 uiop->uio_offset = 0; 275 uiop->uio_resid = len; 276 uiop->uio_rw = UIO_READ; 277 uiop->uio_segflg = UIO_SYSSPACE; 278 uiop->uio_procp = (struct proc *)0; 279 if (error = nfsrv_fhtovp(fhp, TRUE, &vp, cred)) { 280 m_freem(mp3); 281 nfsm_reply(0); 282 } 283 if (vp->v_type != VLNK) { 284 error = EINVAL; 285 goto out; 286 } 287 error = VOP_READLINK(vp, uiop, cred); 288 out: 289 vput(vp); 290 if (error) 291 m_freem(mp3); 292 nfsm_reply(NFSX_UNSIGNED); 293 if (uiop->uio_resid > 0) { 294 len -= uiop->uio_resid; 295 tlen = nfsm_rndup(len); 296 nfsm_adj(mp3, NFS_MAXPATHLEN-tlen, tlen-len); 297 } 298 nfsm_build(tl, u_long *, NFSX_UNSIGNED); 299 *tl = txdr_unsigned(len); 300 mb->m_next = mp3; 301 nfsm_srvdone; 302 } 303 304 /* 305 * nfs read service 306 */ 307 nfsrv_read(mrep, md, dpos, cred, xid, mrq, repstat, p) 308 struct mbuf **mrq; 309 struct mbuf *mrep, *md; 310 caddr_t dpos; 311 struct ucred *cred; 312 u_long xid; 313 int *repstat; 314 struct proc *p; 315 { 316 register struct iovec *iv; 317 struct iovec *iv2; 318 register struct mbuf *m; 319 register struct nfsv2_fattr *fp; 320 register u_long *tl; 321 register long t1; 322 caddr_t bpos; 323 int error = 0; 324 char *cp2; 325 struct mbuf *mb, *mb2, *mreq; 326 struct mbuf *m2, *m3; 327 struct vnode *vp; 328 nfsv2fh_t nfh; 329 fhandle_t *fhp; 330 struct uio io, *uiop = &io; 331 struct vattr va, *vap = &va; 332 int i, cnt, len, left, siz, tlen; 333 off_t off; 334 335 fhp = &nfh.fh_generic; 336 nfsm_srvmtofh(fhp); 337 nfsm_disect(tl, u_long *, NFSX_UNSIGNED); 338 off = fxdr_unsigned(off_t, *tl); 339 nfsm_srvstrsiz(cnt, NFS_MAXDATA); 340 if (error = nfsrv_fhtovp(fhp, TRUE, &vp, cred)) 341 nfsm_reply(0); 342 if (error = nfsrv_access(vp, VREAD | VEXEC, cred, p)) { 343 vput(vp); 344 nfsm_reply(0); 345 } 346 len = left = cnt; 347 /* 348 * Generate the mbuf list with the uio_iov ref. to it. 349 */ 350 i = 0; 351 m3 = (struct mbuf *)0; 352 #ifdef lint 353 m2 = (struct mbuf *)0; 354 #endif /* lint */ 355 MALLOC(iv, struct iovec *, 356 ((NFS_MAXDATA+MLEN-1)/MLEN) * sizeof (struct iovec), M_TEMP, 357 M_WAITOK); 358 iv2 = iv; 359 while (left > 0) { 360 MGET(m, M_WAIT, MT_DATA); 361 if (left > MINCLSIZE) 362 MCLGET(m, M_WAIT); 363 m->m_len = 0; 364 siz = min(M_TRAILINGSPACE(m), left); 365 m->m_len = siz; 366 iv->iov_base = mtod(m, caddr_t); 367 iv->iov_len = siz; 368 iv++; 369 i++; 370 left -= siz; 371 if (m3) { 372 m2->m_next = m; 373 m2 = m; 374 } else 375 m3 = m2 = m; 376 } 377 uiop->uio_iov = iv2; 378 uiop->uio_iovcnt = i; 379 uiop->uio_offset = off; 380 uiop->uio_resid = cnt; 381 uiop->uio_rw = UIO_READ; 382 uiop->uio_segflg = UIO_SYSSPACE; 383 uiop->uio_procp = (struct proc *)0; 384 error = VOP_READ(vp, uiop, IO_NODELOCKED, cred); 385 off = uiop->uio_offset; 386 FREE((caddr_t)iv2, M_TEMP); 387 if (error) { 388 m_freem(m3); 389 vput(vp); 390 nfsm_reply(0); 391 } 392 if (error = VOP_GETATTR(vp, vap, cred, p)) 393 m_freem(m3); 394 vput(vp); 395 nfsm_reply(NFSX_FATTR+NFSX_UNSIGNED); 396 nfsm_build(fp, struct nfsv2_fattr *, NFSX_FATTR); 397 nfsm_srvfillattr; 398 len -= uiop->uio_resid; 399 if (len > 0) { 400 tlen = nfsm_rndup(len); 401 if (cnt != tlen || tlen != len) 402 nfsm_adj(m3, cnt-tlen, tlen-len); 403 } else { 404 m_freem(m3); 405 m3 = (struct mbuf *)0; 406 } 407 nfsm_build(tl, u_long *, NFSX_UNSIGNED); 408 *tl = txdr_unsigned(len); 409 mb->m_next = m3; 410 nfsm_srvdone; 411 } 412 413 /* 414 * nfs write service 415 */ 416 nfsrv_write(mrep, md, dpos, cred, xid, mrq, repstat, p) 417 struct mbuf *mrep, *md, **mrq; 418 caddr_t dpos; 419 struct ucred *cred; 420 u_long xid; 421 int *repstat; 422 struct proc *p; 423 { 424 register struct iovec *ivp; 425 register struct mbuf *mp; 426 register struct nfsv2_fattr *fp; 427 struct iovec iv[NFS_MAXIOVEC]; 428 struct vattr va; 429 register struct vattr *vap = &va; 430 register u_long *tl; 431 register long t1; 432 caddr_t bpos; 433 int error = 0; 434 char *cp2; 435 struct mbuf *mb, *mb2, *mreq; 436 struct vnode *vp; 437 nfsv2fh_t nfh; 438 fhandle_t *fhp; 439 struct uio io, *uiop = &io; 440 off_t off; 441 long siz, len, xfer; 442 443 fhp = &nfh.fh_generic; 444 nfsm_srvmtofh(fhp); 445 nfsm_disect(tl, u_long *, 4*NFSX_UNSIGNED); 446 off = fxdr_unsigned(off_t, *++tl); 447 tl += 2; 448 len = fxdr_unsigned(long, *tl); 449 if (len > NFS_MAXDATA || len <= 0) { 450 error = EBADRPC; 451 nfsm_reply(0); 452 } 453 if (dpos == (mtod(md, caddr_t)+md->m_len)) { 454 mp = md->m_next; 455 if (mp == NULL) { 456 error = EBADRPC; 457 nfsm_reply(0); 458 } 459 } else { 460 mp = md; 461 siz = dpos-mtod(mp, caddr_t); 462 mp->m_len -= siz; 463 NFSMADV(mp, siz); 464 } 465 if (error = nfsrv_fhtovp(fhp, TRUE, &vp, cred)) 466 nfsm_reply(0); 467 if (error = nfsrv_access(vp, VWRITE, cred, p)) { 468 vput(vp); 469 nfsm_reply(0); 470 } 471 uiop->uio_resid = 0; 472 uiop->uio_rw = UIO_WRITE; 473 uiop->uio_segflg = UIO_SYSSPACE; 474 uiop->uio_procp = (struct proc *)0; 475 /* 476 * Do up to NFS_MAXIOVEC mbufs of write each iteration of the 477 * loop until done. 478 */ 479 while (len > 0 && uiop->uio_resid == 0) { 480 ivp = iv; 481 siz = 0; 482 uiop->uio_iov = ivp; 483 uiop->uio_iovcnt = 0; 484 uiop->uio_offset = off; 485 while (len > 0 && uiop->uio_iovcnt < NFS_MAXIOVEC && mp != NULL) { 486 ivp->iov_base = mtod(mp, caddr_t); 487 if (len < mp->m_len) 488 ivp->iov_len = xfer = len; 489 else 490 ivp->iov_len = xfer = mp->m_len; 491 #ifdef notdef 492 /* Not Yet .. */ 493 if (M_HASCL(mp) && (((u_long)ivp->iov_base) & CLOFSET) == 0) 494 ivp->iov_op = NULL; /* what should it be ?? */ 495 else 496 ivp->iov_op = NULL; 497 #endif 498 uiop->uio_iovcnt++; 499 ivp++; 500 len -= xfer; 501 siz += xfer; 502 mp = mp->m_next; 503 } 504 if (len > 0 && mp == NULL) { 505 error = EBADRPC; 506 vput(vp); 507 nfsm_reply(0); 508 } 509 uiop->uio_resid = siz; 510 if (error = VOP_WRITE(vp, uiop, IO_SYNC | IO_NODELOCKED, 511 cred)) { 512 vput(vp); 513 nfsm_reply(0); 514 } 515 off = uiop->uio_offset; 516 } 517 error = VOP_GETATTR(vp, vap, cred, p); 518 vput(vp); 519 nfsm_reply(NFSX_FATTR); 520 nfsm_build(fp, struct nfsv2_fattr *, NFSX_FATTR); 521 nfsm_srvfillattr; 522 nfsm_srvdone; 523 } 524 525 /* 526 * nfs create service 527 * now does a truncate to 0 length via. setattr if it already exists 528 */ 529 nfsrv_create(mrep, md, dpos, cred, xid, mrq, repstat, p) 530 struct mbuf *mrep, *md, **mrq; 531 caddr_t dpos; 532 struct ucred *cred; 533 u_long xid; 534 int *repstat; 535 struct proc *p; 536 { 537 register struct nfsv2_fattr *fp; 538 struct vattr va; 539 register struct vattr *vap = &va; 540 struct nameidata nd; 541 register caddr_t cp; 542 register u_long *tl; 543 register long t1; 544 caddr_t bpos; 545 long rdev; 546 int error = 0; 547 char *cp2; 548 struct mbuf *mb, *mb2, *mreq; 549 struct vnode *vp; 550 nfsv2fh_t nfh; 551 fhandle_t *fhp; 552 long len; 553 554 nd.ni_nameiop = 0; 555 fhp = &nfh.fh_generic; 556 nfsm_srvmtofh(fhp); 557 nfsm_srvstrsiz(len, NFS_MAXNAMLEN); 558 nd.ni_cred = cred; 559 nd.ni_nameiop = CREATE | LOCKPARENT | LOCKLEAF | SAVESTART; 560 if (error = nfs_namei(&nd, fhp, len, &md, &dpos, p)) 561 nfsm_reply(0); 562 VATTR_NULL(vap); 563 nfsm_disect(tl, u_long *, NFSX_SATTR); 564 /* 565 * Iff doesn't exist, create it 566 * otherwise just truncate to 0 length 567 * should I set the mode too ?? 568 */ 569 if (nd.ni_vp == NULL) { 570 vap->va_type = IFTOVT(fxdr_unsigned(u_long, *tl)); 571 if (vap->va_type == VNON) 572 vap->va_type = VREG; 573 vap->va_mode = nfstov_mode(*tl); 574 rdev = fxdr_unsigned(long, *(tl+3)); 575 if (vap->va_type == VREG || vap->va_type == VSOCK) { 576 vrele(nd.ni_startdir); 577 if (error = VOP_CREATE(&nd, vap, p)) 578 nfsm_reply(0); 579 FREE(nd.ni_pnbuf, M_NAMEI); 580 } else if (vap->va_type == VCHR || vap->va_type == VBLK || 581 vap->va_type == VFIFO) { 582 if (vap->va_type == VCHR && rdev == 0xffffffff) 583 vap->va_type = VFIFO; 584 if (vap->va_type == VFIFO) { 585 #ifndef FIFO 586 VOP_ABORTOP(&nd); 587 vput(nd.ni_dvp); 588 error = ENXIO; 589 goto out; 590 #endif /* FIFO */ 591 } else if (error = suser(cred, (short *)0)) { 592 VOP_ABORTOP(&nd); 593 vput(nd.ni_dvp); 594 goto out; 595 } else 596 vap->va_rdev = (dev_t)rdev; 597 if (error = VOP_MKNOD(&nd, vap, cred, p)) { 598 vrele(nd.ni_startdir); 599 nfsm_reply(0); 600 } 601 nd.ni_nameiop &= ~(OPMASK | LOCKPARENT | SAVESTART); 602 nd.ni_nameiop |= LOOKUP; 603 if (error = lookup(&nd, p)) { 604 free(nd.ni_pnbuf, M_NAMEI); 605 nfsm_reply(0); 606 } 607 FREE(nd.ni_pnbuf, M_NAMEI); 608 if (nd.ni_more) { 609 vrele(nd.ni_dvp); 610 vput(nd.ni_vp); 611 VOP_ABORTOP(&nd); 612 error = EINVAL; 613 nfsm_reply(0); 614 } 615 } else { 616 VOP_ABORTOP(&nd); 617 vput(nd.ni_dvp); 618 error = ENXIO; 619 goto out; 620 } 621 vp = nd.ni_vp; 622 } else { 623 vrele(nd.ni_startdir); 624 free(nd.ni_pnbuf, M_NAMEI); 625 vp = nd.ni_vp; 626 if (nd.ni_dvp == vp) 627 vrele(nd.ni_dvp); 628 else 629 vput(nd.ni_dvp); 630 VOP_ABORTOP(&nd); 631 vap->va_size = 0; 632 if (error = VOP_SETATTR(vp, vap, cred, p)) { 633 vput(vp); 634 nfsm_reply(0); 635 } 636 } 637 bzero((caddr_t)fhp, sizeof(nfh)); 638 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; 639 if (error = VFS_VPTOFH(vp, &fhp->fh_fid)) { 640 vput(vp); 641 nfsm_reply(0); 642 } 643 error = VOP_GETATTR(vp, vap, cred, p); 644 vput(vp); 645 nfsm_reply(NFSX_FH+NFSX_FATTR); 646 nfsm_srvfhtom(fhp); 647 nfsm_build(fp, struct nfsv2_fattr *, NFSX_FATTR); 648 nfsm_srvfillattr; 649 return (error); 650 nfsmout: 651 if (nd.ni_nameiop) 652 vrele(nd.ni_startdir); 653 VOP_ABORTOP(&nd); 654 if (nd.ni_dvp == nd.ni_vp) 655 vrele(nd.ni_dvp); 656 else 657 vput(nd.ni_dvp); 658 if (nd.ni_vp) 659 vput(nd.ni_vp); 660 return (error); 661 662 out: 663 vrele(nd.ni_startdir); 664 free(nd.ni_pnbuf, M_NAMEI); 665 nfsm_reply(0); 666 } 667 668 /* 669 * nfs remove service 670 */ 671 nfsrv_remove(mrep, md, dpos, cred, xid, mrq, repstat, p) 672 struct mbuf *mrep, *md, **mrq; 673 caddr_t dpos; 674 struct ucred *cred; 675 u_long xid; 676 int *repstat; 677 struct proc *p; 678 { 679 struct nameidata nd; 680 register u_long *tl; 681 register long t1; 682 caddr_t bpos; 683 int error = 0; 684 char *cp2; 685 struct mbuf *mb, *mreq; 686 struct vnode *vp; 687 nfsv2fh_t nfh; 688 fhandle_t *fhp; 689 long len; 690 691 fhp = &nfh.fh_generic; 692 nfsm_srvmtofh(fhp); 693 nfsm_srvstrsiz(len, NFS_MAXNAMLEN); 694 nd.ni_cred = cred; 695 nd.ni_nameiop = DELETE | LOCKPARENT | LOCKLEAF; 696 if (error = nfs_namei(&nd, fhp, len, &md, &dpos, p)) 697 nfsm_reply(0); 698 vp = nd.ni_vp; 699 if (vp->v_type == VDIR && 700 (error = suser(cred, (short *)0))) 701 goto out; 702 /* 703 * The root of a mounted filesystem cannot be deleted. 704 */ 705 if (vp->v_flag & VROOT) { 706 error = EBUSY; 707 goto out; 708 } 709 if (vp->v_flag & VTEXT) 710 (void) vnode_pager_uncache(vp); 711 out: 712 if (!error) { 713 error = VOP_REMOVE(&nd, p); 714 } else { 715 VOP_ABORTOP(&nd); 716 if (nd.ni_dvp == vp) 717 vrele(nd.ni_dvp); 718 else 719 vput(nd.ni_dvp); 720 vput(vp); 721 } 722 nfsm_reply(0); 723 nfsm_srvdone; 724 } 725 726 /* 727 * nfs rename service 728 */ 729 nfsrv_rename(mrep, md, dpos, cred, xid, mrq, repstat, p) 730 struct mbuf *mrep, *md, **mrq; 731 caddr_t dpos; 732 struct ucred *cred; 733 u_long xid; 734 int *repstat; 735 struct proc *p; 736 { 737 register u_long *tl; 738 register long t1; 739 caddr_t bpos; 740 int error = 0; 741 char *cp2; 742 struct mbuf *mb, *mreq; 743 struct nameidata fromnd, tond; 744 struct vnode *fvp, *tvp, *tdvp; 745 nfsv2fh_t fnfh, tnfh; 746 fhandle_t *ffhp, *tfhp; 747 long len, len2; 748 int rootflg = 0; 749 750 ffhp = &fnfh.fh_generic; 751 tfhp = &tnfh.fh_generic; 752 fromnd.ni_nameiop = 0; 753 tond.ni_nameiop = 0; 754 nfsm_srvmtofh(ffhp); 755 nfsm_srvstrsiz(len, NFS_MAXNAMLEN); 756 /* 757 * Remember if we are root so that we can reset cr_uid before 758 * the second nfs_namei() call 759 */ 760 if (cred->cr_uid == 0) 761 rootflg++; 762 fromnd.ni_cred = cred; 763 fromnd.ni_nameiop = DELETE | WANTPARENT | SAVESTART; 764 if (error = nfs_namei(&fromnd, ffhp, len, &md, &dpos, p)) 765 nfsm_reply(0); 766 fvp = fromnd.ni_vp; 767 nfsm_srvmtofh(tfhp); 768 nfsm_strsiz(len2, NFS_MAXNAMLEN); 769 if (rootflg) 770 cred->cr_uid = 0; 771 tond.ni_cred = cred; 772 tond.ni_nameiop = RENAME | LOCKPARENT | LOCKLEAF | NOCACHE 773 | SAVESTART; 774 if (error = nfs_namei(&tond, tfhp, len2, &md, &dpos, p)) { 775 VOP_ABORTOP(&fromnd); 776 vrele(fromnd.ni_dvp); 777 vrele(fvp); 778 goto out1; 779 } 780 tdvp = tond.ni_dvp; 781 tvp = tond.ni_vp; 782 if (tvp != NULL) { 783 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 784 error = EISDIR; 785 goto out; 786 } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 787 error = ENOTDIR; 788 goto out; 789 } 790 } 791 if (fvp->v_mount != tdvp->v_mount) { 792 error = EXDEV; 793 goto out; 794 } 795 if (fvp == tdvp) 796 error = EINVAL; 797 /* 798 * If source is the same as the destination (that is the 799 * same vnode with the same name in the same directory), 800 * then there is nothing to do. 801 */ 802 if (fvp == tvp && fromnd.ni_dvp == tdvp && 803 fromnd.ni_namelen == tond.ni_namelen && 804 !bcmp(fromnd.ni_ptr, tond.ni_ptr, fromnd.ni_namelen)) 805 error = -1; 806 out: 807 if (!error) { 808 error = VOP_RENAME(&fromnd, &tond, p); 809 } else { 810 VOP_ABORTOP(&tond); 811 if (tdvp == tvp) 812 vrele(tdvp); 813 else 814 vput(tdvp); 815 if (tvp) 816 vput(tvp); 817 VOP_ABORTOP(&fromnd); 818 vrele(fromnd.ni_dvp); 819 vrele(fvp); 820 } 821 vrele(tond.ni_startdir); 822 FREE(tond.ni_pnbuf, M_NAMEI); 823 out1: 824 vrele(fromnd.ni_startdir); 825 FREE(fromnd.ni_pnbuf, M_NAMEI); 826 nfsm_reply(0); 827 return (error); 828 829 nfsmout: 830 if (tond.ni_nameiop) { 831 vrele(tond.ni_startdir); 832 FREE(tond.ni_pnbuf, M_NAMEI); 833 } 834 if (fromnd.ni_nameiop) { 835 vrele(fromnd.ni_startdir); 836 FREE(fromnd.ni_pnbuf, M_NAMEI); 837 VOP_ABORTOP(&fromnd); 838 vrele(fromnd.ni_dvp); 839 vrele(fvp); 840 } 841 return (error); 842 } 843 844 /* 845 * nfs link service 846 */ 847 nfsrv_link(mrep, md, dpos, cred, xid, mrq, repstat, p) 848 struct mbuf *mrep, *md, **mrq; 849 caddr_t dpos; 850 struct ucred *cred; 851 u_long xid; 852 int *repstat; 853 struct proc *p; 854 { 855 struct nameidata nd; 856 register u_long *tl; 857 register long t1; 858 caddr_t bpos; 859 int error = 0; 860 char *cp2; 861 struct mbuf *mb, *mreq; 862 struct vnode *vp, *xp; 863 nfsv2fh_t nfh, dnfh; 864 fhandle_t *fhp, *dfhp; 865 long len; 866 867 fhp = &nfh.fh_generic; 868 dfhp = &dnfh.fh_generic; 869 nfsm_srvmtofh(fhp); 870 nfsm_srvmtofh(dfhp); 871 nfsm_srvstrsiz(len, NFS_MAXNAMLEN); 872 if (error = nfsrv_fhtovp(fhp, FALSE, &vp, cred)) 873 nfsm_reply(0); 874 if (vp->v_type == VDIR && (error = suser(cred, NULL))) 875 goto out1; 876 nd.ni_cred = cred; 877 nd.ni_nameiop = CREATE | LOCKPARENT; 878 if (error = nfs_namei(&nd, dfhp, len, &md, &dpos, p)) 879 goto out1; 880 xp = nd.ni_vp; 881 if (xp != NULL) { 882 error = EEXIST; 883 goto out; 884 } 885 xp = nd.ni_dvp; 886 if (vp->v_mount != xp->v_mount) 887 error = EXDEV; 888 out: 889 if (!error) { 890 error = VOP_LINK(vp, &nd, p); 891 } else { 892 VOP_ABORTOP(&nd); 893 if (nd.ni_dvp == nd.ni_vp) 894 vrele(nd.ni_dvp); 895 else 896 vput(nd.ni_dvp); 897 if (nd.ni_vp) 898 vrele(nd.ni_vp); 899 } 900 out1: 901 vrele(vp); 902 nfsm_reply(0); 903 nfsm_srvdone; 904 } 905 906 /* 907 * nfs symbolic link service 908 */ 909 nfsrv_symlink(mrep, md, dpos, cred, xid, mrq, repstat, p) 910 struct mbuf *mrep, *md, **mrq; 911 caddr_t dpos; 912 struct ucred *cred; 913 u_long xid; 914 int *repstat; 915 struct proc *p; 916 { 917 struct vattr va; 918 struct nameidata nd; 919 register struct vattr *vap = &va; 920 register u_long *tl; 921 register long t1; 922 struct nfsv2_sattr *sp; 923 caddr_t bpos; 924 struct uio io; 925 struct iovec iv; 926 int error = 0; 927 char *pathcp, *cp2; 928 struct mbuf *mb, *mreq; 929 nfsv2fh_t nfh; 930 fhandle_t *fhp; 931 long len, len2; 932 933 pathcp = (char *)0; 934 fhp = &nfh.fh_generic; 935 nfsm_srvmtofh(fhp); 936 nfsm_srvstrsiz(len, NFS_MAXNAMLEN); 937 nd.ni_cred = cred; 938 nd.ni_nameiop = CREATE | LOCKPARENT; 939 if (error = nfs_namei(&nd, fhp, len, &md, &dpos, p)) 940 goto out; 941 nfsm_strsiz(len2, NFS_MAXPATHLEN); 942 MALLOC(pathcp, caddr_t, len2 + 1, M_TEMP, M_WAITOK); 943 iv.iov_base = pathcp; 944 iv.iov_len = len2; 945 io.uio_resid = len2; 946 io.uio_offset = 0; 947 io.uio_iov = &iv; 948 io.uio_iovcnt = 1; 949 io.uio_segflg = UIO_SYSSPACE; 950 io.uio_rw = UIO_READ; 951 io.uio_procp = (struct proc *)0; 952 nfsm_mtouio(&io, len2); 953 nfsm_disect(sp, struct nfsv2_sattr *, NFSX_SATTR); 954 *(pathcp + len2) = '\0'; 955 if (nd.ni_vp) { 956 VOP_ABORTOP(&nd); 957 if (nd.ni_dvp == nd.ni_vp) 958 vrele(nd.ni_dvp); 959 else 960 vput(nd.ni_dvp); 961 vrele(nd.ni_vp); 962 error = EEXIST; 963 goto out; 964 } 965 VATTR_NULL(vap); 966 vap->va_mode = fxdr_unsigned(u_short, sp->sa_mode); 967 error = VOP_SYMLINK(&nd, vap, pathcp, p); 968 out: 969 if (pathcp) 970 FREE(pathcp, M_TEMP); 971 nfsm_reply(0); 972 return (error); 973 nfsmout: 974 VOP_ABORTOP(&nd); 975 if (nd.ni_dvp == nd.ni_vp) 976 vrele(nd.ni_dvp); 977 else 978 vput(nd.ni_dvp); 979 if (nd.ni_vp) 980 vrele(nd.ni_vp); 981 if (pathcp) 982 FREE(pathcp, M_TEMP); 983 return (error); 984 } 985 986 /* 987 * nfs mkdir service 988 */ 989 nfsrv_mkdir(mrep, md, dpos, cred, xid, mrq, repstat, p) 990 struct mbuf *mrep, *md, **mrq; 991 caddr_t dpos; 992 struct ucred *cred; 993 u_long xid; 994 int *repstat; 995 struct proc *p; 996 { 997 struct vattr va; 998 register struct vattr *vap = &va; 999 register struct nfsv2_fattr *fp; 1000 struct nameidata nd; 1001 register caddr_t cp; 1002 register u_long *tl; 1003 register long t1; 1004 caddr_t bpos; 1005 int error = 0; 1006 char *cp2; 1007 struct mbuf *mb, *mb2, *mreq; 1008 struct vnode *vp; 1009 nfsv2fh_t nfh; 1010 fhandle_t *fhp; 1011 long len; 1012 1013 fhp = &nfh.fh_generic; 1014 nfsm_srvmtofh(fhp); 1015 nfsm_srvstrsiz(len, NFS_MAXNAMLEN); 1016 nd.ni_cred = cred; 1017 nd.ni_nameiop = CREATE | LOCKPARENT; 1018 if (error = nfs_namei(&nd, fhp, len, &md, &dpos, p)) 1019 nfsm_reply(0); 1020 nfsm_disect(tl, u_long *, NFSX_UNSIGNED); 1021 VATTR_NULL(vap); 1022 vap->va_type = VDIR; 1023 vap->va_mode = nfstov_mode(*tl++); 1024 vp = nd.ni_vp; 1025 if (vp != NULL) { 1026 VOP_ABORTOP(&nd); 1027 if (nd.ni_dvp == vp) 1028 vrele(nd.ni_dvp); 1029 else 1030 vput(nd.ni_dvp); 1031 vrele(vp); 1032 error = EEXIST; 1033 nfsm_reply(0); 1034 } 1035 if (error = VOP_MKDIR(&nd, vap, p)) 1036 nfsm_reply(0); 1037 vp = nd.ni_vp; 1038 bzero((caddr_t)fhp, sizeof(nfh)); 1039 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; 1040 if (error = VFS_VPTOFH(vp, &fhp->fh_fid)) { 1041 vput(vp); 1042 nfsm_reply(0); 1043 } 1044 error = VOP_GETATTR(vp, vap, cred, p); 1045 vput(vp); 1046 nfsm_reply(NFSX_FH+NFSX_FATTR); 1047 nfsm_srvfhtom(fhp); 1048 nfsm_build(fp, struct nfsv2_fattr *, NFSX_FATTR); 1049 nfsm_srvfillattr; 1050 return (error); 1051 nfsmout: 1052 VOP_ABORTOP(&nd); 1053 if (nd.ni_dvp == nd.ni_vp) 1054 vrele(nd.ni_dvp); 1055 else 1056 vput(nd.ni_dvp); 1057 if (nd.ni_vp) 1058 vrele(nd.ni_vp); 1059 return (error); 1060 } 1061 1062 /* 1063 * nfs rmdir service 1064 */ 1065 nfsrv_rmdir(mrep, md, dpos, cred, xid, mrq, repstat, p) 1066 struct mbuf *mrep, *md, **mrq; 1067 caddr_t dpos; 1068 struct ucred *cred; 1069 u_long xid; 1070 int *repstat; 1071 struct proc *p; 1072 { 1073 register u_long *tl; 1074 register long t1; 1075 caddr_t bpos; 1076 int error = 0; 1077 char *cp2; 1078 struct mbuf *mb, *mreq; 1079 struct vnode *vp; 1080 nfsv2fh_t nfh; 1081 fhandle_t *fhp; 1082 long len; 1083 struct nameidata nd; 1084 1085 fhp = &nfh.fh_generic; 1086 nfsm_srvmtofh(fhp); 1087 nfsm_srvstrsiz(len, NFS_MAXNAMLEN); 1088 nd.ni_cred = cred; 1089 nd.ni_nameiop = DELETE | LOCKPARENT | LOCKLEAF; 1090 if (error = nfs_namei(&nd, fhp, len, &md, &dpos, p)) 1091 nfsm_reply(0); 1092 vp = nd.ni_vp; 1093 if (vp->v_type != VDIR) { 1094 error = ENOTDIR; 1095 goto out; 1096 } 1097 /* 1098 * No rmdir "." please. 1099 */ 1100 if (nd.ni_dvp == vp) { 1101 error = EINVAL; 1102 goto out; 1103 } 1104 /* 1105 * The root of a mounted filesystem cannot be deleted. 1106 */ 1107 if (vp->v_flag & VROOT) 1108 error = EBUSY; 1109 out: 1110 if (!error) { 1111 error = VOP_RMDIR(&nd, p); 1112 } else { 1113 VOP_ABORTOP(&nd); 1114 if (nd.ni_dvp == nd.ni_vp) 1115 vrele(nd.ni_dvp); 1116 else 1117 vput(nd.ni_dvp); 1118 vput(vp); 1119 } 1120 nfsm_reply(0); 1121 nfsm_srvdone; 1122 } 1123 1124 /* 1125 * nfs readdir service 1126 * - mallocs what it thinks is enough to read 1127 * count rounded up to a multiple of NFS_DIRBLKSIZ <= NFS_MAXREADDIR 1128 * - calls VOP_READDIR() 1129 * - loops around building the reply 1130 * if the output generated exceeds count break out of loop 1131 * The nfsm_clget macro is used here so that the reply will be packed 1132 * tightly in mbuf clusters. 1133 * - it only knows that it has encountered eof when the VOP_READDIR() 1134 * reads nothing 1135 * - as such one readdir rpc will return eof false although you are there 1136 * and then the next will return eof 1137 * - it trims out records with d_ino == 0 1138 * this doesn't matter for Unix clients, but they might confuse clients 1139 * for other os'. 1140 * NB: It is tempting to set eof to true if the VOP_READDIR() reads less 1141 * than requested, but this may not apply to all filesystems. For 1142 * example, client NFS does not { although it is never remote mounted 1143 * anyhow } 1144 * PS: The NFS protocol spec. does not clarify what the "count" byte 1145 * argument is a count of.. just name strings and file id's or the 1146 * entire reply rpc or ... 1147 * I tried just file name and id sizes and it confused the Sun client, 1148 * so I am using the full rpc size now. The "paranoia.." comment refers 1149 * to including the status longwords that are not a part of the dir. 1150 * "entry" structures, but are in the rpc. 1151 */ 1152 nfsrv_readdir(mrep, md, dpos, cred, xid, mrq, repstat, p) 1153 struct mbuf **mrq; 1154 struct mbuf *mrep, *md; 1155 caddr_t dpos; 1156 struct ucred *cred; 1157 u_long xid; 1158 int *repstat; 1159 struct proc *p; 1160 { 1161 register char *bp, *be; 1162 register struct mbuf *mp; 1163 register struct direct *dp; 1164 register caddr_t cp; 1165 register u_long *tl; 1166 register long t1; 1167 caddr_t bpos; 1168 int error = 0; 1169 char *cp2; 1170 struct mbuf *mb, *mb2, *mreq; 1171 char *cpos, *cend; 1172 int len, nlen, rem, xfer, tsiz, i; 1173 struct vnode *vp; 1174 struct mbuf *mp2, *mp3; 1175 nfsv2fh_t nfh; 1176 fhandle_t *fhp; 1177 struct uio io; 1178 struct iovec iv; 1179 int siz, cnt, fullsiz, eofflag; 1180 u_long on; 1181 char *rbuf; 1182 off_t off, toff; 1183 1184 fhp = &nfh.fh_generic; 1185 nfsm_srvmtofh(fhp); 1186 nfsm_disect(tl, u_long *, 2*NFSX_UNSIGNED); 1187 toff = fxdr_unsigned(off_t, *tl++); 1188 off = (toff & ~(NFS_DIRBLKSIZ-1)); 1189 on = (toff & (NFS_DIRBLKSIZ-1)); 1190 cnt = fxdr_unsigned(int, *tl); 1191 siz = ((cnt+NFS_DIRBLKSIZ-1) & ~(NFS_DIRBLKSIZ-1)); 1192 if (cnt > NFS_MAXREADDIR) 1193 siz = NFS_MAXREADDIR; 1194 fullsiz = siz; 1195 if (error = nfsrv_fhtovp(fhp, TRUE, &vp, cred)) 1196 nfsm_reply(0); 1197 if (error = nfsrv_access(vp, VEXEC, cred, p)) { 1198 vput(vp); 1199 nfsm_reply(0); 1200 } 1201 VOP_UNLOCK(vp); 1202 MALLOC(rbuf, caddr_t, siz, M_TEMP, M_WAITOK); 1203 again: 1204 iv.iov_base = rbuf; 1205 iv.iov_len = fullsiz; 1206 io.uio_iov = &iv; 1207 io.uio_iovcnt = 1; 1208 io.uio_offset = off; 1209 io.uio_resid = fullsiz; 1210 io.uio_segflg = UIO_SYSSPACE; 1211 io.uio_rw = UIO_READ; 1212 io.uio_procp = (struct proc *)0; 1213 error = VOP_READDIR(vp, &io, cred, &eofflag); 1214 off = io.uio_offset; 1215 if (error) { 1216 vrele(vp); 1217 free((caddr_t)rbuf, M_TEMP); 1218 nfsm_reply(0); 1219 } 1220 if (io.uio_resid) { 1221 siz -= io.uio_resid; 1222 1223 /* 1224 * If nothing read, return eof 1225 * rpc reply 1226 */ 1227 if (siz == 0) { 1228 vrele(vp); 1229 nfsm_reply(2*NFSX_UNSIGNED); 1230 nfsm_build(tl, u_long *, 2*NFSX_UNSIGNED); 1231 *tl++ = nfs_false; 1232 *tl = nfs_true; 1233 FREE((caddr_t)rbuf, M_TEMP); 1234 return (0); 1235 } 1236 } 1237 1238 /* 1239 * Check for degenerate cases of nothing useful read. 1240 * If so go try again 1241 */ 1242 cpos = rbuf + on; 1243 cend = rbuf + siz; 1244 dp = (struct direct *)cpos; 1245 while (cpos < cend && dp->d_ino == 0) { 1246 cpos += dp->d_reclen; 1247 dp = (struct direct *)cpos; 1248 } 1249 if (cpos >= cend) { 1250 toff = off; 1251 siz = fullsiz; 1252 on = 0; 1253 goto again; 1254 } 1255 1256 cpos = rbuf + on; 1257 cend = rbuf + siz; 1258 dp = (struct direct *)cpos; 1259 vrele(vp); 1260 len = 3*NFSX_UNSIGNED; /* paranoia, probably can be 0 */ 1261 bp = be = (caddr_t)0; 1262 mp3 = (struct mbuf *)0; 1263 nfsm_reply(siz); 1264 1265 /* Loop through the records and build reply */ 1266 while (cpos < cend) { 1267 if (dp->d_ino != 0) { 1268 nlen = dp->d_namlen; 1269 rem = nfsm_rndup(nlen)-nlen; 1270 1271 /* 1272 * As noted above, the NFS spec. is not clear about what 1273 * should be included in "count" as totalled up here in 1274 * "len". 1275 */ 1276 len += (4*NFSX_UNSIGNED+nlen+rem); 1277 if (len > cnt) { 1278 eofflag = 0; 1279 break; 1280 } 1281 1282 /* Build the directory record xdr from the direct entry */ 1283 nfsm_clget; 1284 *tl = nfs_true; 1285 bp += NFSX_UNSIGNED; 1286 nfsm_clget; 1287 *tl = txdr_unsigned(dp->d_ino); 1288 bp += NFSX_UNSIGNED; 1289 nfsm_clget; 1290 *tl = txdr_unsigned(nlen); 1291 bp += NFSX_UNSIGNED; 1292 1293 /* And loop arround copying the name */ 1294 xfer = nlen; 1295 cp = dp->d_name; 1296 while (xfer > 0) { 1297 nfsm_clget; 1298 if ((bp+xfer) > be) 1299 tsiz = be-bp; 1300 else 1301 tsiz = xfer; 1302 bcopy(cp, bp, tsiz); 1303 bp += tsiz; 1304 xfer -= tsiz; 1305 if (xfer > 0) 1306 cp += tsiz; 1307 } 1308 /* And null pad to a long boundary */ 1309 for (i = 0; i < rem; i++) 1310 *bp++ = '\0'; 1311 nfsm_clget; 1312 1313 /* Finish off the record */ 1314 toff += dp->d_reclen; 1315 *tl = txdr_unsigned(toff); 1316 bp += NFSX_UNSIGNED; 1317 } else 1318 toff += dp->d_reclen; 1319 cpos += dp->d_reclen; 1320 dp = (struct direct *)cpos; 1321 } 1322 nfsm_clget; 1323 *tl = nfs_false; 1324 bp += NFSX_UNSIGNED; 1325 nfsm_clget; 1326 if (eofflag) 1327 *tl = nfs_true; 1328 else 1329 *tl = nfs_false; 1330 bp += NFSX_UNSIGNED; 1331 if (bp < be) 1332 mp->m_len = bp-mtod(mp, caddr_t); 1333 mb->m_next = mp3; 1334 FREE(rbuf, M_TEMP); 1335 nfsm_srvdone; 1336 } 1337 1338 /* 1339 * nfs statfs service 1340 */ 1341 nfsrv_statfs(mrep, md, dpos, cred, xid, mrq, repstat, p) 1342 struct mbuf **mrq; 1343 struct mbuf *mrep, *md; 1344 caddr_t dpos; 1345 struct ucred *cred; 1346 u_long xid; 1347 int *repstat; 1348 struct proc *p; 1349 { 1350 register struct statfs *sf; 1351 register struct nfsv2_statfs *sfp; 1352 register u_long *tl; 1353 register long t1; 1354 caddr_t bpos; 1355 int error = 0; 1356 char *cp2; 1357 struct mbuf *mb, *mb2, *mreq; 1358 struct vnode *vp; 1359 nfsv2fh_t nfh; 1360 fhandle_t *fhp; 1361 struct statfs statfs; 1362 1363 fhp = &nfh.fh_generic; 1364 nfsm_srvmtofh(fhp); 1365 if (error = nfsrv_fhtovp(fhp, TRUE, &vp, cred)) 1366 nfsm_reply(0); 1367 sf = &statfs; 1368 error = VFS_STATFS(vp->v_mount, sf, p); 1369 vput(vp); 1370 nfsm_reply(NFSX_STATFS); 1371 nfsm_build(sfp, struct nfsv2_statfs *, NFSX_STATFS); 1372 sfp->sf_tsize = txdr_unsigned(NFS_MAXDGRAMDATA); 1373 sfp->sf_bsize = txdr_unsigned(sf->f_bsize); 1374 sfp->sf_blocks = txdr_unsigned(sf->f_blocks); 1375 sfp->sf_bfree = txdr_unsigned(sf->f_bfree); 1376 sfp->sf_bavail = txdr_unsigned(sf->f_bavail); 1377 nfsm_srvdone; 1378 } 1379 1380 /* 1381 * Null operation, used by clients to ping server 1382 */ 1383 /* ARGSUSED */ 1384 nfsrv_null(mrep, md, dpos, cred, xid, mrq, repstat, p) 1385 struct mbuf **mrq; 1386 struct mbuf *mrep, *md; 1387 caddr_t dpos; 1388 struct ucred *cred; 1389 u_long xid; 1390 int *repstat; 1391 struct proc *p; 1392 { 1393 caddr_t bpos; 1394 int error = 0; 1395 struct mbuf *mb, *mreq; 1396 1397 error = VNOVAL; 1398 nfsm_reply(0); 1399 return (error); 1400 } 1401 1402 /* 1403 * No operation, used for obsolete procedures 1404 */ 1405 /* ARGSUSED */ 1406 nfsrv_noop(mrep, md, dpos, cred, xid, mrq, repstat, p) 1407 struct mbuf **mrq; 1408 struct mbuf *mrep, *md; 1409 caddr_t dpos; 1410 struct ucred *cred; 1411 u_long xid; 1412 int *repstat; 1413 struct proc *p; 1414 { 1415 caddr_t bpos; 1416 int error = 0; 1417 struct mbuf *mb, *mreq; 1418 1419 error = EPROCUNAVAIL; 1420 nfsm_reply(0); 1421 return (error); 1422 } 1423 1424 /* 1425 * Perform access checking for vnodes obtained from file handles that would 1426 * refer to files already opened by a Unix client. You cannot just use 1427 * vn_writechk() and VOP_ACCESS() for two reasons. 1428 * 1 - You must check for MNT_EXRDONLY as well as MNT_RDONLY for the write case 1429 * 2 - The owner is to be given access irrespective of mode bits so that 1430 * processes that chmod after opening a file don't break. I don't like 1431 * this because it opens a security hole, but since the nfs server opens 1432 * a security hole the size of a barn door anyhow, what the heck. 1433 */ 1434 nfsrv_access(vp, flags, cred, p) 1435 register struct vnode *vp; 1436 int flags; 1437 register struct ucred *cred; 1438 struct proc *p; 1439 { 1440 struct vattr vattr; 1441 int error; 1442 if (flags & VWRITE) { 1443 /* Just vn_writechk() changed to check MNT_EXRDONLY */ 1444 /* 1445 * Disallow write attempts on read-only file systems; 1446 * unless the file is a socket or a block or character 1447 * device resident on the file system. 1448 */ 1449 if (vp->v_mount->mnt_flag & (MNT_RDONLY | MNT_EXRDONLY)) { 1450 switch (vp->v_type) { 1451 case VREG: case VDIR: case VLNK: 1452 return (EROFS); 1453 } 1454 } 1455 /* 1456 * If there's shared text associated with 1457 * the inode, try to free it up once. If 1458 * we fail, we can't allow writing. 1459 */ 1460 if ((vp->v_flag & VTEXT) && !vnode_pager_uncache(vp)) 1461 return (ETXTBSY); 1462 } 1463 if (error = VOP_GETATTR(vp, &vattr, cred, p)) 1464 return (error); 1465 if ((error = VOP_ACCESS(vp, flags, cred, p)) && 1466 cred->cr_uid != vattr.va_uid) 1467 return (error); 1468 return (0); 1469 } 1470