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_vnops.c 7.61 (Berkeley) 09/06/91 11 */ 12 13 /* 14 * vnode op calls for sun nfs version 2 15 */ 16 17 #include "param.h" 18 #include "proc.h" 19 #include "kernel.h" 20 #include "systm.h" 21 #include "mount.h" 22 #include "buf.h" 23 #include "malloc.h" 24 #include "mbuf.h" 25 #include "conf.h" 26 #include "namei.h" 27 #include "vnode.h" 28 #include "specdev.h" 29 #include "fifo.h" 30 #include "map.h" 31 32 #include "../ufs/quota.h" 33 #include "../ufs/inode.h" 34 #include "../ufs/dir.h" 35 36 #include "nfsv2.h" 37 #include "nfs.h" 38 #include "nfsnode.h" 39 #include "nfsmount.h" 40 #include "xdr_subs.h" 41 #include "nfsm_subs.h" 42 #include "nfsiom.h" 43 44 /* Defs */ 45 #define TRUE 1 46 #define FALSE 0 47 48 /* 49 * Global vfs data structures for nfs 50 */ 51 struct vnodeops nfsv2_vnodeops = { 52 nfs_lookup, /* lookup */ 53 nfs_create, /* create */ 54 nfs_mknod, /* mknod */ 55 nfs_open, /* open */ 56 nfs_close, /* close */ 57 nfs_access, /* access */ 58 nfs_getattr, /* getattr */ 59 nfs_setattr, /* setattr */ 60 nfs_read, /* read */ 61 nfs_write, /* write */ 62 nfs_ioctl, /* ioctl */ 63 nfs_select, /* select */ 64 nfs_mmap, /* mmap */ 65 nfs_fsync, /* fsync */ 66 nfs_seek, /* seek */ 67 nfs_remove, /* remove */ 68 nfs_link, /* link */ 69 nfs_rename, /* rename */ 70 nfs_mkdir, /* mkdir */ 71 nfs_rmdir, /* rmdir */ 72 nfs_symlink, /* symlink */ 73 nfs_readdir, /* readdir */ 74 nfs_readlink, /* readlink */ 75 nfs_abortop, /* abortop */ 76 nfs_inactive, /* inactive */ 77 nfs_reclaim, /* reclaim */ 78 nfs_lock, /* lock */ 79 nfs_unlock, /* unlock */ 80 nfs_bmap, /* bmap */ 81 nfs_strategy, /* strategy */ 82 nfs_print, /* print */ 83 nfs_islocked, /* islocked */ 84 nfs_advlock, /* advlock */ 85 }; 86 87 /* 88 * Special device vnode ops 89 */ 90 struct vnodeops spec_nfsv2nodeops = { 91 spec_lookup, /* lookup */ 92 spec_create, /* create */ 93 spec_mknod, /* mknod */ 94 spec_open, /* open */ 95 spec_close, /* close */ 96 nfs_access, /* access */ 97 nfs_getattr, /* getattr */ 98 nfs_setattr, /* setattr */ 99 spec_read, /* read */ 100 spec_write, /* write */ 101 spec_ioctl, /* ioctl */ 102 spec_select, /* select */ 103 spec_mmap, /* mmap */ 104 spec_fsync, /* fsync */ 105 spec_seek, /* seek */ 106 spec_remove, /* remove */ 107 spec_link, /* link */ 108 spec_rename, /* rename */ 109 spec_mkdir, /* mkdir */ 110 spec_rmdir, /* rmdir */ 111 spec_symlink, /* symlink */ 112 spec_readdir, /* readdir */ 113 spec_readlink, /* readlink */ 114 spec_abortop, /* abortop */ 115 nfs_inactive, /* inactive */ 116 nfs_reclaim, /* reclaim */ 117 nfs_lock, /* lock */ 118 nfs_unlock, /* unlock */ 119 spec_bmap, /* bmap */ 120 spec_strategy, /* strategy */ 121 nfs_print, /* print */ 122 nfs_islocked, /* islocked */ 123 spec_advlock, /* advlock */ 124 }; 125 126 #ifdef FIFO 127 struct vnodeops fifo_nfsv2nodeops = { 128 fifo_lookup, /* lookup */ 129 fifo_create, /* create */ 130 fifo_mknod, /* mknod */ 131 fifo_open, /* open */ 132 fifo_close, /* close */ 133 nfs_access, /* access */ 134 nfs_getattr, /* getattr */ 135 nfs_setattr, /* setattr */ 136 fifo_read, /* read */ 137 fifo_write, /* write */ 138 fifo_ioctl, /* ioctl */ 139 fifo_select, /* select */ 140 fifo_mmap, /* mmap */ 141 fifo_fsync, /* fsync */ 142 fifo_seek, /* seek */ 143 fifo_remove, /* remove */ 144 fifo_link, /* link */ 145 fifo_rename, /* rename */ 146 fifo_mkdir, /* mkdir */ 147 fifo_rmdir, /* rmdir */ 148 fifo_symlink, /* symlink */ 149 fifo_readdir, /* readdir */ 150 fifo_readlink, /* readlink */ 151 fifo_abortop, /* abortop */ 152 nfs_inactive, /* inactive */ 153 nfs_reclaim, /* reclaim */ 154 nfs_lock, /* lock */ 155 nfs_unlock, /* unlock */ 156 fifo_bmap, /* bmap */ 157 fifo_badop, /* strategy */ 158 nfs_print, /* print */ 159 nfs_islocked, /* islocked */ 160 fifo_advlock, /* advlock */ 161 }; 162 #endif /* FIFO */ 163 164 /* 165 * Global vars 166 */ 167 extern u_long nfs_procids[NFS_NPROCS]; 168 extern u_long nfs_prog, nfs_vers; 169 extern char nfsiobuf[MAXPHYS+NBPG]; 170 struct map nfsmap[NFS_MSIZ]; 171 struct buf nfs_bqueue; /* Queue head for nfsiod's */ 172 struct proc *nfs_iodwant[NFS_MAXASYNCDAEMON]; 173 int nfs_numasync = 0; 174 static int nfsmap_want = 0; 175 176 /* 177 * nfs null call from vfs. 178 */ 179 nfs_null(vp, cred, p) 180 struct vnode *vp; 181 struct ucred *cred; 182 struct proc *p; 183 { 184 caddr_t bpos, dpos; 185 u_long xid; 186 int error = 0; 187 struct mbuf *mreq, *mrep, *md, *mb; 188 189 nfsm_reqhead(nfs_procids[NFSPROC_NULL], cred, 0); 190 nfsm_request(vp, NFSPROC_NULL, p, 0); 191 nfsm_reqdone; 192 return (error); 193 } 194 195 /* 196 * nfs access vnode op. 197 * Essentially just get vattr and then imitate iaccess() 198 */ 199 nfs_access(vp, mode, cred, p) 200 struct vnode *vp; 201 int mode; 202 register struct ucred *cred; 203 struct proc *p; 204 { 205 register struct vattr *vap; 206 register gid_t *gp; 207 struct vattr vattr; 208 register int i; 209 int error; 210 211 /* 212 * If you're the super-user, 213 * you always get access. 214 */ 215 if (cred->cr_uid == 0) 216 return (0); 217 vap = &vattr; 218 if (error = nfs_dogetattr(vp, vap, cred, 0, p)) 219 return (error); 220 /* 221 * Access check is based on only one of owner, group, public. 222 * If not owner, then check group. If not a member of the 223 * group, then check public access. 224 */ 225 if (cred->cr_uid != vap->va_uid) { 226 mode >>= 3; 227 gp = cred->cr_groups; 228 for (i = 0; i < cred->cr_ngroups; i++, gp++) 229 if (vap->va_gid == *gp) 230 goto found; 231 mode >>= 3; 232 found: 233 ; 234 } 235 if ((vap->va_mode & mode) != 0) 236 return (0); 237 return (EACCES); 238 } 239 240 /* 241 * nfs open vnode op 242 * Just check to see if the type is ok 243 */ 244 /* ARGSUSED */ 245 nfs_open(vp, mode, cred, p) 246 struct vnode *vp; 247 int mode; 248 struct ucred *cred; 249 struct proc *p; 250 { 251 register enum vtype vtyp; 252 253 vtyp = vp->v_type; 254 if (vtyp == VREG || vtyp == VDIR || vtyp == VLNK) 255 return (0); 256 else 257 return (EACCES); 258 } 259 260 /* 261 * nfs close vnode op 262 * For reg files, invalidate any buffer cache entries. 263 */ 264 /* ARGSUSED */ 265 nfs_close(vp, fflags, cred, p) 266 register struct vnode *vp; 267 int fflags; 268 struct ucred *cred; 269 struct proc *p; 270 { 271 register struct nfsnode *np = VTONFS(vp); 272 int error = 0; 273 274 if (vp->v_type == VREG && (np->n_flag & NMODIFIED)) { 275 nfs_lock(vp); 276 np->n_flag &= ~NMODIFIED; 277 vinvalbuf(vp, TRUE); 278 np->n_attrstamp = 0; 279 if (np->n_flag & NWRITEERR) { 280 np->n_flag &= ~NWRITEERR; 281 error = np->n_error; 282 } 283 nfs_unlock(vp); 284 } 285 return (error); 286 } 287 288 /* 289 * nfs getattr call from vfs. 290 */ 291 nfs_getattr(vp, vap, cred, p) 292 register struct vnode *vp; 293 struct vattr *vap; 294 struct ucred *cred; 295 struct proc *p; 296 { 297 return (nfs_dogetattr(vp, vap, cred, 0, p)); 298 } 299 300 nfs_dogetattr(vp, vap, cred, tryhard, p) 301 register struct vnode *vp; 302 struct vattr *vap; 303 struct ucred *cred; 304 int tryhard; 305 struct proc *p; 306 { 307 register caddr_t cp; 308 register long t1; 309 caddr_t bpos, dpos; 310 u_long xid; 311 int error = 0; 312 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 313 314 /* First look in the cache.. */ 315 if (nfs_getattrcache(vp, vap) == 0) 316 return (0); 317 nfsstats.rpccnt[NFSPROC_GETATTR]++; 318 nfsm_reqhead(nfs_procids[NFSPROC_GETATTR], cred, NFSX_FH); 319 nfsm_fhtom(vp); 320 nfsm_request(vp, NFSPROC_GETATTR, p, tryhard); 321 nfsm_loadattr(vp, vap); 322 nfsm_reqdone; 323 return (error); 324 } 325 326 /* 327 * nfs setattr call. 328 */ 329 nfs_setattr(vp, vap, cred, p) 330 register struct vnode *vp; 331 register struct vattr *vap; 332 struct ucred *cred; 333 struct proc *p; 334 { 335 register struct nfsv2_sattr *sp; 336 register caddr_t cp; 337 register long t1; 338 caddr_t bpos, dpos; 339 u_long xid; 340 int error = 0; 341 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 342 struct nfsnode *np; 343 344 nfsstats.rpccnt[NFSPROC_SETATTR]++; 345 nfsm_reqhead(nfs_procids[NFSPROC_SETATTR], cred, NFSX_FH+NFSX_SATTR); 346 nfsm_fhtom(vp); 347 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 348 if (vap->va_mode == 0xffff) 349 sp->sa_mode = VNOVAL; 350 else 351 sp->sa_mode = vtonfs_mode(vp->v_type, vap->va_mode); 352 if (vap->va_uid == 0xffff) 353 sp->sa_uid = VNOVAL; 354 else 355 sp->sa_uid = txdr_unsigned(vap->va_uid); 356 if (vap->va_gid == 0xffff) 357 sp->sa_gid = VNOVAL; 358 else 359 sp->sa_gid = txdr_unsigned(vap->va_gid); 360 sp->sa_size = txdr_unsigned(vap->va_size); 361 sp->sa_atime.tv_sec = txdr_unsigned(vap->va_atime.tv_sec); 362 sp->sa_atime.tv_usec = txdr_unsigned(vap->va_flags); 363 txdr_time(&vap->va_mtime, &sp->sa_mtime); 364 if (vap->va_size != VNOVAL || vap->va_mtime.tv_sec != VNOVAL || 365 vap->va_atime.tv_sec != VNOVAL) { 366 np = VTONFS(vp); 367 if (np->n_flag & NMODIFIED) { 368 np->n_flag &= ~NMODIFIED; 369 if (vap->va_size == 0) 370 vinvalbuf(vp, FALSE); 371 else 372 vinvalbuf(vp, TRUE); 373 np->n_attrstamp = 0; 374 } 375 } 376 nfsm_request(vp, NFSPROC_SETATTR, p, 1); 377 nfsm_loadattr(vp, (struct vattr *)0); 378 /* should we fill in any vap fields ?? */ 379 nfsm_reqdone; 380 return (error); 381 } 382 383 /* 384 * nfs lookup call, one step at a time... 385 * First look in cache 386 * If not found, unlock the directory nfsnode and do the rpc 387 */ 388 nfs_lookup(vp, ndp, p) 389 register struct vnode *vp; 390 register struct nameidata *ndp; 391 struct proc *p; 392 { 393 register struct vnode *vdp; 394 register u_long *tl; 395 register caddr_t cp; 396 register long t1, t2; 397 caddr_t bpos, dpos, cp2; 398 u_long xid; 399 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 400 struct vnode *newvp; 401 long len; 402 nfsv2fh_t *fhp; 403 struct nfsnode *np; 404 int lockparent, wantparent, flag, error = 0; 405 406 ndp->ni_dvp = vp; 407 ndp->ni_vp = NULL; 408 if (vp->v_type != VDIR) 409 return (ENOTDIR); 410 lockparent = ndp->ni_nameiop & LOCKPARENT; 411 flag = ndp->ni_nameiop & OPMASK; 412 wantparent = ndp->ni_nameiop & (LOCKPARENT|WANTPARENT); 413 if ((error = cache_lookup(ndp)) && error != ENOENT) { 414 struct vattr vattr; 415 int vpid; 416 417 vdp = ndp->ni_vp; 418 vpid = vdp->v_id; 419 /* 420 * See the comment starting `Step through' in ufs/ufs_lookup.c 421 * for an explanation of the locking protocol 422 */ 423 if (vp == vdp) { 424 VREF(vdp); 425 error = 0; 426 } else if (ndp->ni_isdotdot) { 427 nfs_unlock(vp); 428 error = vget(vdp); 429 if (!error && lockparent && *ndp->ni_next == '\0') 430 nfs_lock(vp); 431 } else { 432 error = vget(vdp); 433 if (!lockparent || error || *ndp->ni_next != '\0') 434 nfs_unlock(vp); 435 } 436 if (!error) { 437 if (vpid == vdp->v_id) { 438 if (!nfs_dogetattr(vdp, &vattr, ndp->ni_cred, 0, p)&& 439 vattr.va_ctime.tv_sec == VTONFS(vdp)->n_ctime) { 440 nfsstats.lookupcache_hits++; 441 if (flag != LOOKUP && *ndp->ni_next == 0) 442 ndp->ni_nameiop |= SAVENAME; 443 return (0); 444 } 445 cache_purge(vdp); 446 } 447 nfs_nput(vdp); 448 if (lockparent && vdp != vp && *ndp->ni_next == '\0') 449 nfs_unlock(vp); 450 } 451 ndp->ni_vp = NULLVP; 452 } else 453 nfs_unlock(vp); 454 error = 0; 455 nfsstats.lookupcache_misses++; 456 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 457 len = ndp->ni_namelen; 458 nfsm_reqhead(nfs_procids[NFSPROC_LOOKUP], ndp->ni_cred, NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len)); 459 nfsm_fhtom(vp); 460 nfsm_strtom(ndp->ni_ptr, len, NFS_MAXNAMLEN); 461 nfsm_request(vp, NFSPROC_LOOKUP, p, 0); 462 nfsmout: 463 if (error) { 464 if (lockparent || (flag != CREATE && flag != RENAME) || 465 *ndp->ni_next != 0) 466 nfs_lock(vp); 467 if (flag != LOOKUP && *ndp->ni_next == 0) 468 ndp->ni_nameiop |= SAVENAME; 469 return (error); 470 } 471 nfsm_disect(fhp,nfsv2fh_t *,NFSX_FH); 472 473 /* 474 * Handle DELETE and RENAME cases... 475 */ 476 if (flag == DELETE && *ndp->ni_next == 0) { 477 if (!bcmp(VTONFS(vp)->n_fh.fh_bytes, (caddr_t)fhp, NFSX_FH)) { 478 VREF(vp); 479 newvp = vp; 480 np = VTONFS(vp); 481 } else { 482 if (error = nfs_nget(vp->v_mount, fhp, &np)) { 483 nfs_lock(vp); 484 m_freem(mrep); 485 return (error); 486 } 487 newvp = NFSTOV(np); 488 } 489 if (error = 490 nfs_loadattrcache(&newvp, &md, &dpos, (struct vattr *)0)) { 491 nfs_lock(vp); 492 if (newvp != vp) 493 nfs_nput(newvp); 494 else 495 vrele(vp); 496 m_freem(mrep); 497 return (error); 498 } 499 ndp->ni_vp = newvp; 500 if (lockparent || vp == newvp) 501 nfs_lock(vp); 502 m_freem(mrep); 503 ndp->ni_nameiop |= SAVENAME; 504 return (0); 505 } 506 507 if (flag == RENAME && wantparent && *ndp->ni_next == 0) { 508 if (!bcmp(VTONFS(vp)->n_fh.fh_bytes, (caddr_t)fhp, NFSX_FH)) { 509 nfs_lock(vp); 510 m_freem(mrep); 511 return (EISDIR); 512 } 513 if (error = nfs_nget(vp->v_mount, fhp, &np)) { 514 nfs_lock(vp); 515 m_freem(mrep); 516 return (error); 517 } 518 newvp = NFSTOV(np); 519 if (error = 520 nfs_loadattrcache(&newvp, &md, &dpos, (struct vattr *)0)) { 521 nfs_lock(vp); 522 nfs_nput(newvp); 523 m_freem(mrep); 524 return (error); 525 } 526 ndp->ni_vp = newvp; 527 if (lockparent) 528 nfs_lock(vp); 529 m_freem(mrep); 530 ndp->ni_nameiop |= SAVENAME; 531 return (0); 532 } 533 534 if (!bcmp(VTONFS(vp)->n_fh.fh_bytes, (caddr_t)fhp, NFSX_FH)) { 535 VREF(vp); 536 newvp = vp; 537 np = VTONFS(vp); 538 } else if (ndp->ni_isdotdot) { 539 if (error = nfs_nget(vp->v_mount, fhp, &np)) { 540 nfs_lock(vp); 541 m_freem(mrep); 542 return (error); 543 } 544 newvp = NFSTOV(np); 545 } else { 546 if (error = nfs_nget(vp->v_mount, fhp, &np)) { 547 nfs_lock(vp); 548 m_freem(mrep); 549 return (error); 550 } 551 newvp = NFSTOV(np); 552 } 553 if (error = nfs_loadattrcache(&newvp, &md, &dpos, (struct vattr *)0)) { 554 nfs_lock(vp); 555 if (newvp != vp) 556 nfs_nput(newvp); 557 else 558 vrele(vp); 559 m_freem(mrep); 560 return (error); 561 } 562 m_freem(mrep); 563 564 if (vp == newvp || (lockparent && *ndp->ni_next == '\0')) 565 nfs_lock(vp); 566 ndp->ni_vp = newvp; 567 if (flag != LOOKUP && *ndp->ni_next == 0) 568 ndp->ni_nameiop |= SAVENAME; 569 if (error == 0 && ndp->ni_makeentry) { 570 np->n_ctime = np->n_vattr.va_ctime.tv_sec; 571 cache_enter(ndp); 572 } 573 return (error); 574 } 575 576 /* 577 * nfs read call. 578 * Just call nfs_bioread() to do the work. 579 */ 580 nfs_read(vp, uiop, ioflag, cred) 581 register struct vnode *vp; 582 struct uio *uiop; 583 int ioflag; 584 struct ucred *cred; 585 { 586 if (vp->v_type != VREG) 587 return (EPERM); 588 return (nfs_bioread(vp, uiop, ioflag, cred)); 589 } 590 591 /* 592 * nfs readlink call 593 */ 594 nfs_readlink(vp, uiop, cred) 595 struct vnode *vp; 596 struct uio *uiop; 597 struct ucred *cred; 598 { 599 if (vp->v_type != VLNK) 600 return (EPERM); 601 return (nfs_bioread(vp, uiop, 0, cred)); 602 } 603 604 /* 605 * Do a readlink rpc. 606 * Called by nfs_doio() from below the buffer cache. 607 */ 608 nfs_readlinkrpc(vp, uiop, cred) 609 register struct vnode *vp; 610 struct uio *uiop; 611 struct ucred *cred; 612 { 613 register u_long *tl; 614 register caddr_t cp; 615 register long t1; 616 caddr_t bpos, dpos, cp2; 617 u_long xid; 618 int error = 0; 619 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 620 long len; 621 622 nfsstats.rpccnt[NFSPROC_READLINK]++; 623 nfsm_reqhead(nfs_procids[NFSPROC_READLINK], cred, NFSX_FH); 624 nfsm_fhtom(vp); 625 nfsm_request(vp, NFSPROC_READLINK, uiop->uio_procp, 0); 626 nfsm_strsiz(len, NFS_MAXPATHLEN); 627 nfsm_mtouio(uiop, len); 628 nfsm_reqdone; 629 return (error); 630 } 631 632 /* 633 * nfs read rpc call 634 * Ditto above 635 */ 636 nfs_readrpc(vp, uiop, cred) 637 register struct vnode *vp; 638 struct uio *uiop; 639 struct ucred *cred; 640 { 641 register u_long *tl; 642 register caddr_t cp; 643 register long t1; 644 caddr_t bpos, dpos, cp2; 645 u_long xid; 646 int error = 0; 647 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 648 struct nfsmount *nmp; 649 long len, retlen, tsiz; 650 651 nmp = VFSTONFS(vp->v_mount); 652 tsiz = uiop->uio_resid; 653 while (tsiz > 0) { 654 nfsstats.rpccnt[NFSPROC_READ]++; 655 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz; 656 nfsm_reqhead(nfs_procids[NFSPROC_READ], cred, NFSX_FH+NFSX_UNSIGNED*3); 657 nfsm_fhtom(vp); 658 nfsm_build(tl, u_long *, NFSX_UNSIGNED*3); 659 *tl++ = txdr_unsigned(uiop->uio_offset); 660 *tl++ = txdr_unsigned(len); 661 *tl = 0; 662 nfsm_request(vp, NFSPROC_READ, uiop->uio_procp, 1); 663 nfsm_loadattr(vp, (struct vattr *)0); 664 nfsm_strsiz(retlen, nmp->nm_rsize); 665 nfsm_mtouio(uiop, retlen); 666 m_freem(mrep); 667 if (retlen < len) 668 tsiz = 0; 669 else 670 tsiz -= len; 671 } 672 nfsmout: 673 return (error); 674 } 675 676 /* 677 * nfs write call 678 */ 679 nfs_writerpc(vp, uiop, cred) 680 register struct vnode *vp; 681 struct uio *uiop; 682 struct ucred *cred; 683 { 684 register u_long *tl; 685 register caddr_t cp; 686 register long t1; 687 caddr_t bpos, dpos; 688 u_long xid; 689 int error = 0; 690 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 691 struct nfsmount *nmp; 692 long len, tsiz; 693 694 nmp = VFSTONFS(vp->v_mount); 695 tsiz = uiop->uio_resid; 696 while (tsiz > 0) { 697 nfsstats.rpccnt[NFSPROC_WRITE]++; 698 len = (tsiz > nmp->nm_wsize) ? nmp->nm_wsize : tsiz; 699 nfsm_reqhead(nfs_procids[NFSPROC_WRITE], cred, 700 NFSX_FH+NFSX_UNSIGNED*4); 701 nfsm_fhtom(vp); 702 nfsm_build(tl, u_long *, NFSX_UNSIGNED*4); 703 *(tl+1) = txdr_unsigned(uiop->uio_offset); 704 *(tl+3) = txdr_unsigned(len); 705 nfsm_uiotom(uiop, len); 706 nfsm_request(vp, NFSPROC_WRITE, uiop->uio_procp, 1); 707 nfsm_loadattr(vp, (struct vattr *)0); 708 m_freem(mrep); 709 tsiz -= len; 710 } 711 nfsmout: 712 return (error); 713 } 714 715 /* 716 * nfs mknod call 717 * This is a kludge. Use a create rpc but with the IFMT bits of the mode 718 * set to specify the file type and the size field for rdev. 719 */ 720 /* ARGSUSED */ 721 nfs_mknod(ndp, vap, cred, p) 722 struct nameidata *ndp; 723 struct ucred *cred; 724 register struct vattr *vap; 725 struct proc *p; 726 { 727 register struct nfsv2_sattr *sp; 728 register u_long *tl; 729 register caddr_t cp; 730 register long t1, t2; 731 caddr_t bpos, dpos; 732 u_long xid; 733 int error = 0; 734 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 735 u_long rdev; 736 737 if (vap->va_type == VCHR || vap->va_type == VBLK) 738 rdev = txdr_unsigned(vap->va_rdev); 739 #ifdef FIFO 740 else if (vap->va_type == VFIFO) 741 rdev = 0xffffffff; 742 #endif /* FIFO */ 743 else { 744 VOP_ABORTOP(ndp); 745 vput(ndp->ni_dvp); 746 return (EOPNOTSUPP); 747 } 748 nfsstats.rpccnt[NFSPROC_CREATE]++; 749 nfsm_reqhead(nfs_procids[NFSPROC_CREATE], ndp->ni_cred, 750 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_namelen)+NFSX_SATTR); 751 nfsm_fhtom(ndp->ni_dvp); 752 nfsm_strtom(ndp->ni_ptr, ndp->ni_namelen, NFS_MAXNAMLEN); 753 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 754 sp->sa_mode = vtonfs_mode(vap->va_type, vap->va_mode); 755 sp->sa_uid = txdr_unsigned(ndp->ni_cred->cr_uid); 756 sp->sa_gid = txdr_unsigned(ndp->ni_cred->cr_gid); 757 sp->sa_size = rdev; 758 /* or should these be VNOVAL ?? */ 759 txdr_time(&vap->va_atime, &sp->sa_atime); 760 txdr_time(&vap->va_mtime, &sp->sa_mtime); 761 nfsm_request(ndp->ni_dvp, NFSPROC_CREATE, p, 1); 762 nfsm_reqdone; 763 FREE(ndp->ni_pnbuf, M_NAMEI); 764 VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED; 765 nfs_nput(ndp->ni_dvp); 766 return (error); 767 } 768 769 /* 770 * nfs file create call 771 */ 772 nfs_create(ndp, vap, p) 773 register struct nameidata *ndp; 774 register struct vattr *vap; 775 struct proc *p; 776 { 777 register struct nfsv2_sattr *sp; 778 register u_long *tl; 779 register caddr_t cp; 780 register long t1, t2; 781 caddr_t bpos, dpos, cp2; 782 u_long xid; 783 int error = 0; 784 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 785 786 nfsstats.rpccnt[NFSPROC_CREATE]++; 787 nfsm_reqhead(nfs_procids[NFSPROC_CREATE], ndp->ni_cred, 788 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_namelen)+NFSX_SATTR); 789 nfsm_fhtom(ndp->ni_dvp); 790 nfsm_strtom(ndp->ni_ptr, ndp->ni_namelen, NFS_MAXNAMLEN); 791 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 792 sp->sa_mode = vtonfs_mode(vap->va_type, vap->va_mode); 793 sp->sa_uid = txdr_unsigned(ndp->ni_cred->cr_uid); 794 sp->sa_gid = txdr_unsigned(ndp->ni_cred->cr_gid); 795 sp->sa_size = txdr_unsigned(0); 796 /* or should these be VNOVAL ?? */ 797 txdr_time(&vap->va_atime, &sp->sa_atime); 798 txdr_time(&vap->va_mtime, &sp->sa_mtime); 799 nfsm_request(ndp->ni_dvp, NFSPROC_CREATE, p, 1); 800 nfsm_mtofh(ndp->ni_dvp, ndp->ni_vp); 801 nfsm_reqdone; 802 FREE(ndp->ni_pnbuf, M_NAMEI); 803 VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED; 804 nfs_nput(ndp->ni_dvp); 805 return (error); 806 } 807 808 /* 809 * nfs file remove call 810 * To try and make nfs semantics closer to ufs semantics, a file that has 811 * other processes using the vnode is renamed instead of removed and then 812 * removed later on the last close. 813 * - If v_usecount > 1 814 * If a rename is not already in the works 815 * call nfs_sillyrename() to set it up 816 * else 817 * do the remove rpc 818 */ 819 nfs_remove(ndp, p) 820 register struct nameidata *ndp; 821 struct proc *p; 822 { 823 register struct vnode *vp = ndp->ni_vp; 824 register struct nfsnode *np = VTONFS(ndp->ni_vp); 825 register u_long *tl; 826 register caddr_t cp; 827 register long t1, t2; 828 caddr_t bpos, dpos; 829 u_long xid; 830 int error = 0; 831 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 832 833 if (vp->v_usecount > 1) { 834 if (!np->n_sillyrename) 835 error = nfs_sillyrename(ndp, p); 836 } else { 837 nfsstats.rpccnt[NFSPROC_REMOVE]++; 838 nfsm_reqhead(nfs_procids[NFSPROC_REMOVE], ndp->ni_cred, 839 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_namelen)); 840 nfsm_fhtom(ndp->ni_dvp); 841 nfsm_strtom(ndp->ni_ptr, ndp->ni_namelen, NFS_MAXNAMLEN); 842 nfsm_request(ndp->ni_dvp, NFSPROC_REMOVE, p, 1); 843 nfsm_reqdone; 844 FREE(ndp->ni_pnbuf, M_NAMEI); 845 VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED; 846 /* 847 * Kludge City: If the first reply to the remove rpc is lost.. 848 * the reply to the retransmitted request will be ENOENT 849 * since the file was in fact removed 850 * Therefore, we cheat and return success. 851 */ 852 if (error == ENOENT) 853 error = 0; 854 } 855 np->n_attrstamp = 0; 856 if (ndp->ni_dvp == vp) 857 vrele(vp); 858 else 859 nfs_nput(ndp->ni_dvp); 860 nfs_nput(vp); 861 return (error); 862 } 863 864 /* 865 * nfs file remove rpc called from nfs_inactive 866 */ 867 nfs_removeit(sp, p) 868 register struct sillyrename *sp; 869 struct proc *p; 870 { 871 register u_long *tl; 872 register caddr_t cp; 873 register long t1, t2; 874 caddr_t bpos, dpos; 875 u_long xid; 876 int error = 0; 877 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 878 879 nfsstats.rpccnt[NFSPROC_REMOVE]++; 880 nfsm_reqhead(nfs_procids[NFSPROC_REMOVE], sp->s_cred, 881 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(sp->s_namlen)); 882 nfsm_fhtom(sp->s_dvp); 883 nfsm_strtom(sp->s_name, sp->s_namlen, NFS_MAXNAMLEN); 884 nfsm_request(sp->s_dvp, NFSPROC_REMOVE, p, 1); 885 nfsm_reqdone; 886 VTONFS(sp->s_dvp)->n_flag |= NMODIFIED; 887 return (error); 888 } 889 890 /* 891 * nfs file rename call 892 */ 893 nfs_rename(sndp, tndp, p) 894 register struct nameidata *sndp, *tndp; 895 struct proc *p; 896 { 897 register u_long *tl; 898 register caddr_t cp; 899 register long t1, t2; 900 caddr_t bpos, dpos; 901 u_long xid; 902 int error = 0; 903 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 904 905 nfsstats.rpccnt[NFSPROC_RENAME]++; 906 nfsm_reqhead(nfs_procids[NFSPROC_RENAME], tndp->ni_cred, 907 (NFSX_FH+NFSX_UNSIGNED)*2+nfsm_rndup(sndp->ni_namelen) + 908 nfsm_rndup(tndp->ni_namelen)); /* or sndp->ni_cred?*/ 909 nfsm_fhtom(sndp->ni_dvp); 910 nfsm_strtom(sndp->ni_ptr, sndp->ni_namelen, NFS_MAXNAMLEN); 911 nfsm_fhtom(tndp->ni_dvp); 912 nfsm_strtom(tndp->ni_ptr, tndp->ni_namelen, NFS_MAXNAMLEN); 913 nfsm_request(sndp->ni_dvp, NFSPROC_RENAME, p, 1); 914 nfsm_reqdone; 915 VTONFS(sndp->ni_dvp)->n_flag |= NMODIFIED; 916 VTONFS(tndp->ni_dvp)->n_flag |= NMODIFIED; 917 if (sndp->ni_vp->v_type == VDIR) { 918 if (tndp->ni_vp != NULL && tndp->ni_vp->v_type == VDIR) 919 cache_purge(tndp->ni_dvp); 920 cache_purge(sndp->ni_dvp); 921 } 922 if (tndp->ni_dvp == tndp->ni_vp) 923 vrele(tndp->ni_dvp); 924 else 925 vput(tndp->ni_dvp); 926 if (tndp->ni_vp) 927 vput(tndp->ni_vp); 928 vrele(sndp->ni_dvp); 929 vrele(sndp->ni_vp); 930 /* 931 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry. 932 */ 933 if (error == ENOENT) 934 error = 0; 935 return (error); 936 } 937 938 /* 939 * nfs file rename rpc called from nfs_remove() above 940 */ 941 nfs_renameit(sndp, sp, p) 942 register struct nameidata *sndp; 943 register struct sillyrename *sp; 944 struct proc *p; 945 { 946 register u_long *tl; 947 register caddr_t cp; 948 register long t1, t2; 949 caddr_t bpos, dpos; 950 u_long xid; 951 int error = 0; 952 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 953 954 nfsstats.rpccnt[NFSPROC_RENAME]++; 955 nfsm_reqhead(nfs_procids[NFSPROC_RENAME], sp->s_cred, 956 (NFSX_FH+NFSX_UNSIGNED)*2+nfsm_rndup(sndp->ni_namelen) + 957 nfsm_rndup(sp->s_namlen)); /* or sndp->ni_cred?*/ 958 nfsm_fhtom(sndp->ni_dvp); 959 nfsm_strtom(sndp->ni_ptr, sndp->ni_namelen, NFS_MAXNAMLEN); 960 nfsm_fhtom(sp->s_dvp); 961 nfsm_strtom(sp->s_name, sp->s_namlen, NFS_MAXNAMLEN); 962 nfsm_request(sndp->ni_dvp, NFSPROC_RENAME, p, 1); 963 nfsm_reqdone; 964 FREE(sndp->ni_pnbuf, M_NAMEI); 965 VTONFS(sndp->ni_dvp)->n_flag |= NMODIFIED; 966 VTONFS(sp->s_dvp)->n_flag |= NMODIFIED; 967 return (error); 968 } 969 970 /* 971 * nfs hard link create call 972 */ 973 nfs_link(vp, ndp, p) 974 register struct vnode *vp; 975 register struct nameidata *ndp; 976 struct proc *p; 977 { 978 register u_long *tl; 979 register caddr_t cp; 980 register long t1, t2; 981 caddr_t bpos, dpos; 982 u_long xid; 983 int error = 0; 984 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 985 986 if (ndp->ni_dvp != vp) 987 nfs_lock(vp); 988 nfsstats.rpccnt[NFSPROC_LINK]++; 989 nfsm_reqhead(nfs_procids[NFSPROC_LINK], ndp->ni_cred, 990 NFSX_FH*2+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_namelen)); 991 nfsm_fhtom(vp); 992 nfsm_fhtom(ndp->ni_dvp); 993 nfsm_strtom(ndp->ni_ptr, ndp->ni_namelen, NFS_MAXNAMLEN); 994 nfsm_request(vp, NFSPROC_LINK, p, 1); 995 nfsm_reqdone; 996 FREE(ndp->ni_pnbuf, M_NAMEI); 997 VTONFS(vp)->n_attrstamp = 0; 998 VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED; 999 if (ndp->ni_dvp != vp) 1000 nfs_unlock(vp); 1001 nfs_nput(ndp->ni_dvp); 1002 /* 1003 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 1004 */ 1005 if (error == EEXIST) 1006 error = 0; 1007 return (error); 1008 } 1009 1010 /* 1011 * nfs symbolic link create call 1012 */ 1013 nfs_symlink(ndp, vap, nm, p) 1014 struct nameidata *ndp; 1015 struct vattr *vap; 1016 char *nm; /* is this the path ?? */ 1017 struct proc *p; 1018 { 1019 register struct nfsv2_sattr *sp; 1020 register u_long *tl; 1021 register caddr_t cp; 1022 register long t1, t2; 1023 caddr_t bpos, dpos; 1024 u_long xid; 1025 int error = 0; 1026 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1027 1028 nfsstats.rpccnt[NFSPROC_SYMLINK]++; 1029 nfsm_reqhead(nfs_procids[NFSPROC_SYMLINK], ndp->ni_cred, 1030 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_namelen)+NFSX_UNSIGNED); 1031 nfsm_fhtom(ndp->ni_dvp); 1032 nfsm_strtom(ndp->ni_ptr, ndp->ni_namelen, NFS_MAXNAMLEN); 1033 nfsm_strtom(nm, strlen(nm), NFS_MAXPATHLEN); 1034 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 1035 sp->sa_mode = vtonfs_mode(VLNK, vap->va_mode); 1036 sp->sa_uid = txdr_unsigned(ndp->ni_cred->cr_uid); 1037 sp->sa_gid = txdr_unsigned(ndp->ni_cred->cr_gid); 1038 sp->sa_size = txdr_unsigned(VNOVAL); 1039 txdr_time(&vap->va_atime, &sp->sa_atime); /* or VNOVAL ?? */ 1040 txdr_time(&vap->va_mtime, &sp->sa_mtime); /* or VNOVAL ?? */ 1041 nfsm_request(ndp->ni_dvp, NFSPROC_SYMLINK, p, 1); 1042 nfsm_reqdone; 1043 FREE(ndp->ni_pnbuf, M_NAMEI); 1044 VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED; 1045 nfs_nput(ndp->ni_dvp); 1046 /* 1047 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 1048 */ 1049 if (error == EEXIST) 1050 error = 0; 1051 return (error); 1052 } 1053 1054 /* 1055 * nfs make dir call 1056 */ 1057 nfs_mkdir(ndp, vap, p) 1058 register struct nameidata *ndp; 1059 struct vattr *vap; 1060 struct proc *p; 1061 { 1062 register struct nfsv2_sattr *sp; 1063 register u_long *tl; 1064 register caddr_t cp; 1065 register long t1, t2; 1066 register int len; 1067 caddr_t bpos, dpos, cp2; 1068 u_long xid; 1069 int error = 0, firsttry = 1; 1070 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1071 1072 len = ndp->ni_namelen; 1073 nfsstats.rpccnt[NFSPROC_MKDIR]++; 1074 nfsm_reqhead(nfs_procids[NFSPROC_MKDIR], ndp->ni_cred, 1075 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len)+NFSX_SATTR); 1076 nfsm_fhtom(ndp->ni_dvp); 1077 nfsm_strtom(ndp->ni_ptr, len, NFS_MAXNAMLEN); 1078 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 1079 sp->sa_mode = vtonfs_mode(VDIR, vap->va_mode); 1080 sp->sa_uid = txdr_unsigned(ndp->ni_cred->cr_uid); 1081 sp->sa_gid = txdr_unsigned(ndp->ni_cred->cr_gid); 1082 sp->sa_size = txdr_unsigned(VNOVAL); 1083 txdr_time(&vap->va_atime, &sp->sa_atime); /* or VNOVAL ?? */ 1084 txdr_time(&vap->va_mtime, &sp->sa_mtime); /* or VNOVAL ?? */ 1085 nfsm_request(ndp->ni_dvp, NFSPROC_MKDIR, p, 1); 1086 nfsm_mtofh(ndp->ni_dvp, ndp->ni_vp); 1087 nfsm_reqdone; 1088 VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED; 1089 /* 1090 * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry 1091 * if we can succeed in looking up the directory. 1092 * "firsttry" is necessary since the macros may "goto nfsmout" which 1093 * is above the if on errors. (Ugh) 1094 */ 1095 if (error == EEXIST && firsttry) { 1096 firsttry = 0; 1097 error = 0; 1098 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 1099 ndp->ni_vp = NULL; 1100 nfsm_reqhead(nfs_procids[NFSPROC_LOOKUP], ndp->ni_cred, 1101 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len)); 1102 nfsm_fhtom(ndp->ni_dvp); 1103 nfsm_strtom(ndp->ni_ptr, len, NFS_MAXNAMLEN); 1104 nfsm_request(ndp->ni_dvp, NFSPROC_LOOKUP, p, 1); 1105 nfsm_mtofh(ndp->ni_dvp, ndp->ni_vp); 1106 if (ndp->ni_vp->v_type != VDIR) { 1107 vput(ndp->ni_vp); 1108 error = EEXIST; 1109 } 1110 m_freem(mrep); 1111 } 1112 FREE(ndp->ni_pnbuf, M_NAMEI); 1113 nfs_nput(ndp->ni_dvp); 1114 return (error); 1115 } 1116 1117 /* 1118 * nfs remove directory call 1119 */ 1120 nfs_rmdir(ndp, p) 1121 register struct nameidata *ndp; 1122 struct proc *p; 1123 { 1124 register u_long *tl; 1125 register caddr_t cp; 1126 register long t1, t2; 1127 caddr_t bpos, dpos; 1128 u_long xid; 1129 int error = 0; 1130 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1131 1132 if (ndp->ni_dvp == ndp->ni_vp) { 1133 vrele(ndp->ni_dvp); 1134 nfs_nput(ndp->ni_dvp); 1135 return (EINVAL); 1136 } 1137 nfsstats.rpccnt[NFSPROC_RMDIR]++; 1138 nfsm_reqhead(nfs_procids[NFSPROC_RMDIR], ndp->ni_cred, 1139 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_namelen)); 1140 nfsm_fhtom(ndp->ni_dvp); 1141 nfsm_strtom(ndp->ni_ptr, ndp->ni_namelen, NFS_MAXNAMLEN); 1142 nfsm_request(ndp->ni_dvp, NFSPROC_RMDIR, p, 1); 1143 nfsm_reqdone; 1144 FREE(ndp->ni_pnbuf, M_NAMEI); 1145 VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED; 1146 cache_purge(ndp->ni_dvp); 1147 cache_purge(ndp->ni_vp); 1148 nfs_nput(ndp->ni_vp); 1149 nfs_nput(ndp->ni_dvp); 1150 /* 1151 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry. 1152 */ 1153 if (error == ENOENT) 1154 error = 0; 1155 return (error); 1156 } 1157 1158 /* 1159 * nfs readdir call 1160 * Although cookie is defined as opaque, I translate it to/from net byte 1161 * order so that it looks more sensible. This appears consistent with the 1162 * Ultrix implementation of NFS. 1163 */ 1164 nfs_readdir(vp, uiop, cred, eofflagp) 1165 register struct vnode *vp; 1166 struct uio *uiop; 1167 struct ucred *cred; 1168 int *eofflagp; 1169 { 1170 register struct nfsnode *np = VTONFS(vp); 1171 int tresid, error; 1172 struct vattr vattr; 1173 1174 if (vp->v_type != VDIR) 1175 return (EPERM); 1176 /* 1177 * First, check for hit on the EOF offset cache 1178 */ 1179 if (uiop->uio_offset != 0 && uiop->uio_offset == np->n_direofoffset && 1180 (np->n_flag & NMODIFIED) == 0 && 1181 nfs_dogetattr(vp, &vattr, cred, 0, uiop->uio_procp) == 0 && 1182 np->n_mtime == vattr.va_mtime.tv_sec) { 1183 *eofflagp = 1; 1184 nfsstats.direofcache_hits++; 1185 return (0); 1186 } 1187 1188 /* 1189 * Call nfs_bioread() to do the real work. 1190 */ 1191 tresid = uiop->uio_resid; 1192 error = nfs_bioread(vp, uiop, 0, cred); 1193 1194 if (!error && uiop->uio_resid == tresid) { 1195 *eofflagp = 1; 1196 nfsstats.direofcache_misses++; 1197 } else 1198 *eofflagp = 0; 1199 return (error); 1200 } 1201 1202 /* 1203 * Readdir rpc call. 1204 * Called from below the buffer cache by nfs_doio(). 1205 */ 1206 nfs_readdirrpc(vp, uiop, cred) 1207 register struct vnode *vp; 1208 struct uio *uiop; 1209 struct ucred *cred; 1210 { 1211 register long len; 1212 register struct direct *dp; 1213 register u_long *tl; 1214 register caddr_t cp; 1215 register long t1; 1216 long tlen, lastlen; 1217 caddr_t bpos, dpos, cp2; 1218 u_long xid; 1219 int error = 0; 1220 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1221 struct mbuf *md2; 1222 caddr_t dpos2; 1223 int siz; 1224 int more_dirs = 1; 1225 off_t off, savoff; 1226 struct direct *savdp; 1227 struct nfsmount *nmp; 1228 struct nfsnode *np = VTONFS(vp); 1229 long tresid; 1230 1231 nmp = VFSTONFS(vp->v_mount); 1232 tresid = uiop->uio_resid; 1233 /* 1234 * Loop around doing readdir rpc's of size uio_resid or nm_rsize, 1235 * whichever is smaller, truncated to a multiple of NFS_DIRBLKSIZ. 1236 * The stopping criteria is EOF or buffer full. 1237 */ 1238 while (more_dirs && uiop->uio_resid >= NFS_DIRBLKSIZ) { 1239 nfsstats.rpccnt[NFSPROC_READDIR]++; 1240 nfsm_reqhead(nfs_procids[NFSPROC_READDIR], cred, xid); 1241 nfsm_fhtom(vp); 1242 nfsm_build(tl, u_long *, 2*NFSX_UNSIGNED); 1243 *tl++ = txdr_unsigned(uiop->uio_offset); 1244 *tl = txdr_unsigned(((uiop->uio_resid > nmp->nm_rsize) ? 1245 nmp->nm_rsize : uiop->uio_resid) & ~(NFS_DIRBLKSIZ-1)); 1246 nfsm_request(vp, NFSPROC_READDIR, uiop->uio_procp, 0); 1247 siz = 0; 1248 nfsm_disect(tl, u_long *, NFSX_UNSIGNED); 1249 more_dirs = fxdr_unsigned(int, *tl); 1250 1251 /* Save the position so that we can do nfsm_mtouio() later */ 1252 dpos2 = dpos; 1253 md2 = md; 1254 1255 /* loop thru the dir entries, doctoring them to 4bsd form */ 1256 off = uiop->uio_offset; 1257 #ifdef lint 1258 dp = (struct direct *)0; 1259 #endif /* lint */ 1260 while (more_dirs && siz < uiop->uio_resid) { 1261 savoff = off; /* Hold onto offset and dp */ 1262 savdp = dp; 1263 nfsm_disecton(tl, u_long *, 2*NFSX_UNSIGNED); 1264 dp = (struct direct *)tl; 1265 dp->d_ino = fxdr_unsigned(u_long, *tl++); 1266 len = fxdr_unsigned(int, *tl); 1267 if (len <= 0 || len > NFS_MAXNAMLEN) { 1268 error = EBADRPC; 1269 m_freem(mrep); 1270 goto nfsmout; 1271 } 1272 dp->d_namlen = (u_short)len; 1273 nfsm_adv(len); /* Point past name */ 1274 tlen = nfsm_rndup(len); 1275 /* 1276 * This should not be necessary, but some servers have 1277 * broken XDR such that these bytes are not null filled. 1278 */ 1279 if (tlen != len) { 1280 *dpos = '\0'; /* Null-terminate */ 1281 nfsm_adv(tlen - len); 1282 len = tlen; 1283 } 1284 nfsm_disecton(tl, u_long *, 2*NFSX_UNSIGNED); 1285 off = fxdr_unsigned(off_t, *tl); 1286 *tl++ = 0; /* Ensures null termination of name */ 1287 more_dirs = fxdr_unsigned(int, *tl); 1288 dp->d_reclen = len+4*NFSX_UNSIGNED; 1289 siz += dp->d_reclen; 1290 } 1291 /* 1292 * If at end of rpc data, get the eof boolean 1293 */ 1294 if (!more_dirs) { 1295 nfsm_disecton(tl, u_long *, NFSX_UNSIGNED); 1296 more_dirs = (fxdr_unsigned(int, *tl) == 0); 1297 1298 /* 1299 * If at EOF, cache directory offset 1300 */ 1301 if (!more_dirs) 1302 np->n_direofoffset = off; 1303 } 1304 /* 1305 * If there is too much to fit in the data buffer, use savoff and 1306 * savdp to trim off the last record. 1307 * --> we are not at eof 1308 */ 1309 if (siz > uiop->uio_resid) { 1310 off = savoff; 1311 siz -= dp->d_reclen; 1312 dp = savdp; 1313 more_dirs = 0; /* Paranoia */ 1314 } 1315 if (siz > 0) { 1316 lastlen = dp->d_reclen; 1317 md = md2; 1318 dpos = dpos2; 1319 nfsm_mtouio(uiop, siz); 1320 uiop->uio_offset = off; 1321 } else 1322 more_dirs = 0; /* Ugh, never happens, but in case.. */ 1323 m_freem(mrep); 1324 } 1325 /* 1326 * Fill last record, iff any, out to a multiple of NFS_DIRBLKSIZ 1327 * by increasing d_reclen for the last record. 1328 */ 1329 if (uiop->uio_resid < tresid) { 1330 len = uiop->uio_resid & (NFS_DIRBLKSIZ - 1); 1331 if (len > 0) { 1332 dp = (struct direct *) 1333 (uiop->uio_iov->iov_base - lastlen); 1334 dp->d_reclen += len; 1335 uiop->uio_iov->iov_base += len; 1336 uiop->uio_iov->iov_len -= len; 1337 uiop->uio_resid -= len; 1338 } 1339 } 1340 nfsmout: 1341 return (error); 1342 } 1343 1344 static char hextoasc[] = "0123456789abcdef"; 1345 1346 /* 1347 * Silly rename. To make the NFS filesystem that is stateless look a little 1348 * more like the "ufs" a remove of an active vnode is translated to a rename 1349 * to a funny looking filename that is removed by nfs_inactive on the 1350 * nfsnode. There is the potential for another process on a different client 1351 * to create the same funny name between the nfs_lookitup() fails and the 1352 * nfs_rename() completes, but... 1353 */ 1354 nfs_sillyrename(ndp, p) 1355 register struct nameidata *ndp; 1356 struct proc *p; 1357 { 1358 register struct nfsnode *np; 1359 register struct sillyrename *sp; 1360 int error; 1361 short pid; 1362 1363 np = VTONFS(ndp->ni_dvp); 1364 cache_purge(ndp->ni_dvp); 1365 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename), 1366 M_NFSREQ, M_WAITOK); 1367 bcopy((caddr_t)&np->n_fh, (caddr_t)&sp->s_fh, NFSX_FH); 1368 np = VTONFS(ndp->ni_vp); 1369 sp->s_cred = crdup(ndp->ni_cred); 1370 sp->s_dvp = ndp->ni_dvp; 1371 VREF(sp->s_dvp); 1372 1373 /* Fudge together a funny name */ 1374 pid = p->p_pid; 1375 bcopy(".nfsAxxxx4.4", sp->s_name, 13); 1376 sp->s_namlen = 12; 1377 sp->s_name[8] = hextoasc[pid & 0xf]; 1378 sp->s_name[7] = hextoasc[(pid >> 4) & 0xf]; 1379 sp->s_name[6] = hextoasc[(pid >> 8) & 0xf]; 1380 sp->s_name[5] = hextoasc[(pid >> 12) & 0xf]; 1381 1382 /* Try lookitups until we get one that isn't there */ 1383 while (nfs_lookitup(sp, (nfsv2fh_t *)0, p) == 0) { 1384 sp->s_name[4]++; 1385 if (sp->s_name[4] > 'z') { 1386 error = EINVAL; 1387 goto bad; 1388 } 1389 } 1390 if (error = nfs_renameit(ndp, sp, p)) 1391 goto bad; 1392 nfs_lookitup(sp, &np->n_fh, p); 1393 np->n_sillyrename = sp; 1394 return (0); 1395 bad: 1396 vrele(sp->s_dvp); 1397 crfree(sp->s_cred); 1398 free((caddr_t)sp, M_NFSREQ); 1399 return (error); 1400 } 1401 1402 /* 1403 * Look up a file name for silly rename stuff. 1404 * Just like nfs_lookup() except that it doesn't load returned values 1405 * into the nfsnode table. 1406 * If fhp != NULL it copies the returned file handle out 1407 */ 1408 nfs_lookitup(sp, fhp, p) 1409 register struct sillyrename *sp; 1410 nfsv2fh_t *fhp; 1411 struct proc *p; 1412 { 1413 register struct vnode *vp = sp->s_dvp; 1414 register u_long *tl; 1415 register caddr_t cp; 1416 register long t1, t2; 1417 caddr_t bpos, dpos, cp2; 1418 u_long xid; 1419 int error = 0; 1420 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1421 long len; 1422 1423 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 1424 len = sp->s_namlen; 1425 nfsm_reqhead(nfs_procids[NFSPROC_LOOKUP], sp->s_cred, NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len)); 1426 nfsm_fhtom(vp); 1427 nfsm_strtom(sp->s_name, len, NFS_MAXNAMLEN); 1428 nfsm_request(vp, NFSPROC_LOOKUP, p, 1); 1429 if (fhp != NULL) { 1430 nfsm_disect(cp, caddr_t, NFSX_FH); 1431 bcopy(cp, (caddr_t)fhp, NFSX_FH); 1432 } 1433 nfsm_reqdone; 1434 return (error); 1435 } 1436 1437 /* 1438 * Kludge City.. 1439 * - make nfs_bmap() essentially a no-op that does no translation 1440 * - do nfs_strategy() by faking physical I/O with nfs_readrpc/nfs_writerpc 1441 * after mapping the physical addresses into Kernel Virtual space in the 1442 * nfsiobuf area. 1443 * (Maybe I could use the process's page mapping, but I was concerned that 1444 * Kernel Write might not be enabled and also figured copyout() would do 1445 * a lot more work than bcopy() and also it currently happens in the 1446 * context of the swapper process (2). 1447 */ 1448 nfs_bmap(vp, bn, vpp, bnp) 1449 struct vnode *vp; 1450 daddr_t bn; 1451 struct vnode **vpp; 1452 daddr_t *bnp; 1453 { 1454 if (vpp != NULL) 1455 *vpp = vp; 1456 if (bnp != NULL) 1457 *bnp = bn * btodb(vp->v_mount->mnt_stat.f_bsize); 1458 return (0); 1459 } 1460 1461 /* 1462 * Strategy routine for phys. i/o 1463 * If the biod's are running, queue a request 1464 * otherwise just call nfs_doio() to get it done 1465 */ 1466 nfs_strategy(bp) 1467 register struct buf *bp; 1468 { 1469 register struct buf *dp; 1470 register int i; 1471 int error = 0; 1472 int fnd = 0; 1473 1474 /* 1475 * Set b_proc. It seems a bit silly to do it here, but since bread() 1476 * doesn't set it, I will. 1477 * Set b_proc == NULL for asynchronous ops, since these may still 1478 * be hanging about after the process terminates. 1479 */ 1480 if ((bp->b_flags & B_PHYS) == 0) { 1481 if (bp->b_flags & B_ASYNC) 1482 bp->b_proc = (struct proc *)0; 1483 else 1484 bp->b_proc = curproc; 1485 } 1486 /* 1487 * If the op is asynchronous and an i/o daemon is waiting 1488 * queue the request, wake it up and wait for completion 1489 * otherwise just do it ourselves. 1490 */ 1491 if ((bp->b_flags & B_ASYNC) == 0 || nfs_numasync == 0) 1492 return (nfs_doio(bp)); 1493 for (i = 0; i < NFS_MAXASYNCDAEMON; i++) { 1494 if (nfs_iodwant[i]) { 1495 dp = &nfs_bqueue; 1496 if (dp->b_actf == NULL) { 1497 dp->b_actl = bp; 1498 bp->b_actf = dp; 1499 } else { 1500 dp->b_actf->b_actl = bp; 1501 bp->b_actf = dp->b_actf; 1502 } 1503 dp->b_actf = bp; 1504 bp->b_actl = dp; 1505 fnd++; 1506 wakeup((caddr_t)&nfs_iodwant[i]); 1507 break; 1508 } 1509 } 1510 if (!fnd) 1511 error = nfs_doio(bp); 1512 return (error); 1513 } 1514 1515 /* 1516 * Fun and games with i/o 1517 * Essentially play ubasetup() and disk interrupt service routine by 1518 * mapping the data buffer into kernel virtual space and doing the 1519 * nfs read or write rpc's from it. 1520 * If the nfsiod's are not running, this is just called from nfs_strategy(), 1521 * otherwise it is called by the nfsiods to do what would normally be 1522 * partially disk interrupt driven. 1523 */ 1524 nfs_doio(bp) 1525 register struct buf *bp; 1526 { 1527 register struct uio *uiop; 1528 register struct vnode *vp; 1529 struct nfsnode *np; 1530 struct ucred *cr; 1531 int error; 1532 struct uio uio; 1533 struct iovec io; 1534 1535 vp = bp->b_vp; 1536 np = VTONFS(vp); 1537 uiop = &uio; 1538 uiop->uio_iov = &io; 1539 uiop->uio_iovcnt = 1; 1540 uiop->uio_segflg = UIO_SYSSPACE; 1541 uiop->uio_procp = (struct proc *)0; 1542 1543 /* 1544 * For phys i/o, map the b_addr into kernel virtual space using 1545 * the Nfsiomap pte's 1546 * Also, add a temporary b_rcred for reading using the process's uid 1547 * and a guess at a group 1548 */ 1549 if (bp->b_flags & B_PHYS) { 1550 if (bp->b_flags & B_DIRTY) 1551 uiop->uio_procp = pageproc; 1552 cr = crcopy(uiop->uio_procp->p_ucred); 1553 /* mapping was already done by vmapbuf */ 1554 io.iov_base = bp->b_un.b_addr; 1555 1556 /* 1557 * And do the i/o rpc 1558 */ 1559 io.iov_len = uiop->uio_resid = bp->b_bcount; 1560 uiop->uio_offset = bp->b_blkno * DEV_BSIZE; 1561 if (bp->b_flags & B_READ) { 1562 uiop->uio_rw = UIO_READ; 1563 nfsstats.read_physios++; 1564 bp->b_error = error = nfs_readrpc(vp, uiop, cr); 1565 (void) vnode_pager_uncache(vp); 1566 } else { 1567 uiop->uio_rw = UIO_WRITE; 1568 nfsstats.write_physios++; 1569 bp->b_error = error = nfs_writerpc(vp, uiop, cr); 1570 } 1571 1572 /* 1573 * Finally, release pte's used by physical i/o 1574 */ 1575 crfree(cr); 1576 } else { 1577 if (bp->b_flags & B_READ) { 1578 io.iov_len = uiop->uio_resid = bp->b_bcount; 1579 io.iov_base = bp->b_un.b_addr; 1580 uiop->uio_rw = UIO_READ; 1581 switch (vp->v_type) { 1582 case VREG: 1583 uiop->uio_offset = bp->b_blkno * DEV_BSIZE; 1584 nfsstats.read_bios++; 1585 error = nfs_readrpc(vp, uiop, bp->b_rcred); 1586 break; 1587 case VLNK: 1588 uiop->uio_offset = 0; 1589 nfsstats.readlink_bios++; 1590 error = nfs_readlinkrpc(vp, uiop, bp->b_rcred); 1591 break; 1592 case VDIR: 1593 uiop->uio_offset = bp->b_lblkno; 1594 nfsstats.readdir_bios++; 1595 error = nfs_readdirrpc(vp, uiop, bp->b_rcred); 1596 /* 1597 * Save offset cookie in b_blkno. 1598 */ 1599 bp->b_blkno = uiop->uio_offset; 1600 break; 1601 }; 1602 bp->b_error = error; 1603 } else { 1604 io.iov_len = uiop->uio_resid = bp->b_dirtyend 1605 - bp->b_dirtyoff; 1606 uiop->uio_offset = (bp->b_blkno * DEV_BSIZE) 1607 + bp->b_dirtyoff; 1608 io.iov_base = bp->b_un.b_addr + bp->b_dirtyoff; 1609 uiop->uio_rw = UIO_WRITE; 1610 nfsstats.write_bios++; 1611 bp->b_error = error = nfs_writerpc(vp, uiop, 1612 bp->b_wcred); 1613 if (error) { 1614 np->n_error = error; 1615 np->n_flag |= NWRITEERR; 1616 } 1617 bp->b_dirtyoff = bp->b_dirtyend = 0; 1618 } 1619 } 1620 if (error) 1621 bp->b_flags |= B_ERROR; 1622 bp->b_resid = uiop->uio_resid; 1623 biodone(bp); 1624 return (error); 1625 } 1626 1627 /* 1628 * Mmap a file 1629 * 1630 * NB Currently unsupported. 1631 */ 1632 /* ARGSUSED */ 1633 nfs_mmap(vp, fflags, cred, p) 1634 struct vnode *vp; 1635 int fflags; 1636 struct ucred *cred; 1637 struct proc *p; 1638 { 1639 1640 return (EINVAL); 1641 } 1642 1643 /* 1644 * Flush all the blocks associated with a vnode. 1645 * Walk through the buffer pool and push any dirty pages 1646 * associated with the vnode. 1647 */ 1648 /* ARGSUSED */ 1649 nfs_fsync(vp, fflags, cred, waitfor, p) 1650 register struct vnode *vp; 1651 int fflags; 1652 struct ucred *cred; 1653 int waitfor; 1654 struct proc *p; 1655 { 1656 register struct nfsnode *np = VTONFS(vp); 1657 int error = 0; 1658 1659 if (np->n_flag & NMODIFIED) { 1660 np->n_flag &= ~NMODIFIED; 1661 vflushbuf(vp, waitfor == MNT_WAIT ? B_SYNC : 0); 1662 } 1663 if (!error && (np->n_flag & NWRITEERR)) 1664 error = np->n_error; 1665 return (error); 1666 } 1667 1668 /* 1669 * NFS advisory byte-level locks. 1670 * Currently unsupported. 1671 */ 1672 nfs_advlock(vp, id, op, fl, flags) 1673 struct vnode *vp; 1674 caddr_t id; 1675 int op; 1676 struct flock *fl; 1677 int flags; 1678 { 1679 1680 return (EOPNOTSUPP); 1681 } 1682 1683 /* 1684 * Print out the contents of an nfsnode. 1685 */ 1686 nfs_print(vp) 1687 struct vnode *vp; 1688 { 1689 register struct nfsnode *np = VTONFS(vp); 1690 1691 printf("tag VT_NFS, fileid %d fsid 0x%x", 1692 np->n_vattr.va_fileid, np->n_vattr.va_fsid); 1693 #ifdef FIFO 1694 if (vp->v_type == VFIFO) 1695 fifo_printinfo(vp); 1696 #endif /* FIFO */ 1697 printf("%s\n", (np->n_flag & NLOCKED) ? " (LOCKED)" : ""); 1698 if (np->n_lockholder == 0) 1699 return; 1700 printf("\towner pid %d", np->n_lockholder); 1701 if (np->n_lockwaiter) 1702 printf(" waiting pid %d", np->n_lockwaiter); 1703 printf("\n"); 1704 } 1705