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 7.69 (Berkeley) 03/03/92 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 "rpcv2.h" 33 #include "nfsv2.h" 34 #include "nfs.h" 35 #include "nfsnode.h" 36 #include "nfsmount.h" 37 #include "xdr_subs.h" 38 #include "nfsm_subs.h" 39 #include "nqnfs.h" 40 41 /* Defs */ 42 #define TRUE 1 43 #define FALSE 0 44 45 /* 46 * Global vfs data structures for nfs 47 */ 48 struct vnodeops nfsv2_vnodeops = { 49 nfs_lookup, /* lookup */ 50 nfs_create, /* create */ 51 nfs_mknod, /* mknod */ 52 nfs_open, /* open */ 53 nfs_close, /* close */ 54 nfs_access, /* access */ 55 nfs_getattr, /* getattr */ 56 nfs_setattr, /* setattr */ 57 nfs_read, /* read */ 58 nfs_write, /* write */ 59 nfs_ioctl, /* ioctl */ 60 nfs_select, /* select */ 61 nfs_mmap, /* mmap */ 62 nfs_fsync, /* fsync */ 63 nfs_seek, /* seek */ 64 nfs_remove, /* remove */ 65 nfs_link, /* link */ 66 nfs_rename, /* rename */ 67 nfs_mkdir, /* mkdir */ 68 nfs_rmdir, /* rmdir */ 69 nfs_symlink, /* symlink */ 70 nfs_readdir, /* readdir */ 71 nfs_readlink, /* readlink */ 72 nfs_abortop, /* abortop */ 73 nfs_inactive, /* inactive */ 74 nfs_reclaim, /* reclaim */ 75 nfs_lock, /* lock */ 76 nfs_unlock, /* unlock */ 77 nfs_bmap, /* bmap */ 78 nfs_strategy, /* strategy */ 79 nfs_print, /* print */ 80 nfs_islocked, /* islocked */ 81 nfs_advlock, /* advlock */ 82 nfs_blkatoff, /* blkatoff */ 83 nfs_vget, /* vget */ 84 nfs_valloc, /* valloc */ 85 nfs_vfree, /* vfree */ 86 nfs_truncate, /* truncate */ 87 nfs_update, /* update */ 88 bwrite, /* bwrite */ 89 }; 90 91 /* 92 * Special device vnode ops 93 */ 94 struct vnodeops spec_nfsv2nodeops = { 95 spec_lookup, /* lookup */ 96 spec_create, /* create */ 97 spec_mknod, /* mknod */ 98 spec_open, /* open */ 99 spec_close, /* close */ 100 nfs_access, /* access */ 101 nfs_getattr, /* getattr */ 102 nfs_setattr, /* setattr */ 103 spec_read, /* read */ 104 spec_write, /* write */ 105 spec_ioctl, /* ioctl */ 106 spec_select, /* select */ 107 spec_mmap, /* mmap */ 108 spec_fsync, /* fsync */ 109 spec_seek, /* seek */ 110 spec_remove, /* remove */ 111 spec_link, /* link */ 112 spec_rename, /* rename */ 113 spec_mkdir, /* mkdir */ 114 spec_rmdir, /* rmdir */ 115 spec_symlink, /* symlink */ 116 spec_readdir, /* readdir */ 117 spec_readlink, /* readlink */ 118 spec_abortop, /* abortop */ 119 nfs_inactive, /* inactive */ 120 nfs_reclaim, /* reclaim */ 121 nfs_lock, /* lock */ 122 nfs_unlock, /* unlock */ 123 spec_bmap, /* bmap */ 124 spec_strategy, /* strategy */ 125 nfs_print, /* print */ 126 nfs_islocked, /* islocked */ 127 spec_advlock, /* advlock */ 128 spec_blkatoff, /* blkatoff */ 129 spec_vget, /* vget */ 130 spec_valloc, /* valloc */ 131 spec_vfree, /* vfree */ 132 spec_truncate, /* truncate */ 133 nfs_update, /* update */ 134 bwrite, /* bwrite */ 135 }; 136 137 #ifdef FIFO 138 struct vnodeops fifo_nfsv2nodeops = { 139 fifo_lookup, /* lookup */ 140 fifo_create, /* create */ 141 fifo_mknod, /* mknod */ 142 fifo_open, /* open */ 143 fifo_close, /* close */ 144 nfs_access, /* access */ 145 nfs_getattr, /* getattr */ 146 nfs_setattr, /* setattr */ 147 fifo_read, /* read */ 148 fifo_write, /* write */ 149 fifo_ioctl, /* ioctl */ 150 fifo_select, /* select */ 151 fifo_mmap, /* mmap */ 152 fifo_fsync, /* fsync */ 153 fifo_seek, /* seek */ 154 fifo_remove, /* remove */ 155 fifo_link, /* link */ 156 fifo_rename, /* rename */ 157 fifo_mkdir, /* mkdir */ 158 fifo_rmdir, /* rmdir */ 159 fifo_symlink, /* symlink */ 160 fifo_readdir, /* readdir */ 161 fifo_readlink, /* readlink */ 162 fifo_abortop, /* abortop */ 163 nfs_inactive, /* inactive */ 164 nfs_reclaim, /* reclaim */ 165 nfs_lock, /* lock */ 166 nfs_unlock, /* unlock */ 167 fifo_bmap, /* bmap */ 168 fifo_badop, /* strategy */ 169 nfs_print, /* print */ 170 nfs_islocked, /* islocked */ 171 fifo_advlock, /* advlock */ 172 fifo_blkatoff, /* blkatoff */ 173 fifo_vget, /* vget */ 174 fifo_valloc, /* valloc */ 175 fifo_vfree, /* vfree */ 176 fifo_truncate, /* truncate */ 177 nfs_update, /* update */ 178 bwrite, /* bwrite */ 179 }; 180 #endif /* FIFO */ 181 182 /* 183 * Global variables 184 */ 185 extern u_long nfs_procids[NFS_NPROCS]; 186 extern u_long nfs_prog, nfs_vers; 187 extern char nfsiobuf[MAXPHYS+NBPG]; 188 struct buf nfs_bqueue; /* Queue head for nfsiod's */ 189 struct proc *nfs_iodwant[NFS_MAXASYNCDAEMON]; 190 int nfs_numasync = 0; 191 #define DIRHDSIZ (sizeof (struct readdir) - (MAXNAMLEN + 1)) 192 193 /* 194 * nfs null call from vfs. 195 */ 196 int 197 nfs_null(vp, cred, procp) 198 struct vnode *vp; 199 struct ucred *cred; 200 struct proc *procp; 201 { 202 caddr_t bpos, dpos; 203 int error = 0; 204 struct mbuf *mreq, *mrep, *md, *mb; 205 206 nfsm_reqhead(vp, NFSPROC_NULL, 0); 207 nfsm_request(vp, NFSPROC_NULL, procp, cred); 208 nfsm_reqdone; 209 return (error); 210 } 211 212 /* 213 * nfs access vnode op. 214 * Essentially just get vattr and then imitate iaccess() 215 */ 216 int 217 nfs_access(vp, mode, cred, procp) 218 struct vnode *vp; 219 int mode; 220 register struct ucred *cred; 221 struct proc *procp; 222 { 223 register struct vattr *vap; 224 register gid_t *gp; 225 struct vattr vattr; 226 register int i; 227 int error; 228 229 /* 230 * If you're the super-user, 231 * you always get access. 232 */ 233 if (cred->cr_uid == 0) 234 return (0); 235 vap = &vattr; 236 if (error = nfs_getattr(vp, vap, cred, procp)) 237 return (error); 238 /* 239 * Access check is based on only one of owner, group, public. 240 * If not owner, then check group. If not a member of the 241 * group, then check public access. 242 */ 243 if (cred->cr_uid != vap->va_uid) { 244 mode >>= 3; 245 gp = cred->cr_groups; 246 for (i = 0; i < cred->cr_ngroups; i++, gp++) 247 if (vap->va_gid == *gp) 248 goto found; 249 mode >>= 3; 250 found: 251 ; 252 } 253 if ((vap->va_mode & mode) != 0) 254 return (0); 255 return (EACCES); 256 } 257 258 /* 259 * nfs open vnode op 260 * Just check to see if the type is ok 261 * and that deletion is not in progress. 262 */ 263 /* ARGSUSED */ 264 int 265 nfs_open(vp, mode, cred, procp) 266 register struct vnode *vp; 267 int mode; 268 struct ucred *cred; 269 struct proc *procp; 270 { 271 272 if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK) 273 return (EACCES); 274 if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS) == 0) 275 VTONFS(vp)->n_attrstamp = 0; /* For Open/Close consistency */ 276 return (0); 277 } 278 279 /* 280 * nfs close vnode op 281 * For reg files, invalidate any buffer cache entries. 282 */ 283 /* ARGSUSED */ 284 int 285 nfs_close(vp, fflags, cred, procp) 286 register struct vnode *vp; 287 int fflags; 288 struct ucred *cred; 289 struct proc *procp; 290 { 291 register struct nfsnode *np = VTONFS(vp); 292 int error = 0; 293 294 if ((np->n_flag & NMODIFIED) && 295 (VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS) == 0 && 296 vp->v_type == VREG) { 297 np->n_flag &= ~NMODIFIED; 298 vinvalbuf(vp, TRUE); 299 np->n_attrstamp = 0; 300 if (np->n_flag & NWRITEERR) { 301 np->n_flag &= ~NWRITEERR; 302 error = np->n_error; 303 } 304 } 305 return (error); 306 } 307 308 /* 309 * nfs getattr call from vfs. 310 */ 311 int 312 nfs_getattr(vp, vap, cred, procp) 313 register struct vnode *vp; 314 struct vattr *vap; 315 struct ucred *cred; 316 struct proc *procp; 317 { 318 register caddr_t cp; 319 caddr_t bpos, dpos; 320 int error = 0; 321 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 322 323 /* First look in the cache.. */ 324 if (nfs_getattrcache(vp, vap) == 0) 325 return (0); 326 nfsstats.rpccnt[NFSPROC_GETATTR]++; 327 nfsm_reqhead(vp, NFSPROC_GETATTR, NFSX_FH); 328 nfsm_fhtom(vp); 329 nfsm_request(vp, NFSPROC_GETATTR, procp, cred); 330 nfsm_loadattr(vp, vap); 331 nfsm_reqdone; 332 return (error); 333 } 334 335 /* 336 * nfs setattr call. 337 */ 338 int 339 nfs_setattr(vp, vap, cred, procp) 340 register struct vnode *vp; 341 register struct vattr *vap; 342 struct ucred *cred; 343 struct proc *procp; 344 { 345 register struct nfsv2_sattr *sp; 346 register caddr_t cp; 347 register long t1; 348 caddr_t bpos, dpos, cp2; 349 u_long *tl; 350 int error = 0; 351 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 352 struct nfsnode *np = VTONFS(vp); 353 u_quad_t frev; 354 355 nfsstats.rpccnt[NFSPROC_SETATTR]++; 356 nfsm_reqhead(vp, NFSPROC_SETATTR, NFSX_FH+NFSX_SATTR); 357 nfsm_fhtom(vp); 358 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 359 if (vap->va_mode == 0xffff) 360 sp->sa_mode = VNOVAL; 361 else 362 sp->sa_mode = vtonfs_mode(vp->v_type, vap->va_mode); 363 if (vap->va_uid == 0xffff) 364 sp->sa_uid = VNOVAL; 365 else 366 sp->sa_uid = txdr_unsigned(vap->va_uid); 367 if (vap->va_gid == 0xffff) 368 sp->sa_gid = VNOVAL; 369 else 370 sp->sa_gid = txdr_unsigned(vap->va_gid); 371 sp->sa_size = txdr_unsigned(vap->va_size); 372 sp->sa_atime.tv_sec = txdr_unsigned(vap->va_atime.tv_sec); 373 sp->sa_atime.tv_usec = txdr_unsigned(vap->va_flags); 374 txdr_time(&vap->va_mtime, &sp->sa_mtime); 375 if (vap->va_size != VNOVAL || vap->va_mtime.tv_sec != VNOVAL || 376 vap->va_atime.tv_sec != VNOVAL) { 377 if (np->n_flag & NMODIFIED) { 378 np->n_flag &= ~NMODIFIED; 379 if (vap->va_size == 0) 380 vinvalbuf(vp, FALSE); 381 else 382 vinvalbuf(vp, TRUE); 383 } 384 } 385 nfsm_request(vp, NFSPROC_SETATTR, procp, cred); 386 nfsm_loadattr(vp, (struct vattr *)0); 387 if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS) && 388 NQNFS_CKCACHABLE(vp, NQL_WRITE)) { 389 nfsm_dissect(tl, u_long *, 2*NFSX_UNSIGNED); 390 fxdr_hyper(tl, &frev); 391 if (QUADGT(frev, np->n_brev)) 392 np->n_brev = frev; 393 } 394 nfsm_reqdone; 395 return (error); 396 } 397 398 /* 399 * nfs lookup call, one step at a time... 400 * First look in cache 401 * If not found, unlock the directory nfsnode and do the rpc 402 */ 403 int 404 nfs_lookup(dvp, vpp, cnp) 405 struct vnode *dvp; 406 struct vnode **vpp; 407 struct componentname *cnp; 408 { 409 register struct vnode *vdp; 410 register u_long *tl; 411 register caddr_t cp; 412 register long t1, t2; 413 struct nfsmount *nmp; 414 struct nfsnode *tp; 415 caddr_t bpos, dpos, cp2; 416 time_t reqtime; 417 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 418 struct vnode *newvp; 419 long len; 420 nfsv2fh_t *fhp; 421 struct nfsnode *np; 422 int lockparent, wantparent, error = 0; 423 int nqlflag, cachable; 424 u_quad_t frev; 425 426 *vpp = NULL; 427 if (dvp->v_type != VDIR) 428 return (ENOTDIR); 429 lockparent = cnp->cn_flags & LOCKPARENT; 430 wantparent = cnp->cn_flags & (LOCKPARENT|WANTPARENT); 431 nmp = VFSTONFS(dvp->v_mount); 432 np = VTONFS(dvp); 433 if ((error = cache_lookup(dvp, vpp, cnp)) && error != ENOENT) { 434 struct vattr vattr; 435 int vpid; 436 437 vdp = *vpp; 438 vpid = vdp->v_id; 439 /* 440 * See the comment starting `Step through' in ufs/ufs_lookup.c 441 * for an explanation of the locking protocol 442 */ 443 if (dvp == vdp) { 444 VREF(vdp); 445 error = 0; 446 } else 447 error = vget(vdp); 448 if (!error) { 449 if (vpid == vdp->v_id) { 450 if (nmp->nm_flag & NFSMNT_NQNFS) { 451 if (NQNFS_CKCACHABLE(dvp, NQL_READ)) { 452 if (QUADNE(np->n_lrev, np->n_brev) || 453 (np->n_flag & NMODIFIED)) { 454 np->n_direofoffset = 0; 455 cache_purge(dvp); 456 np->n_flag &= ~NMODIFIED; 457 vinvalbuf(dvp, FALSE); 458 np->n_brev = np->n_lrev; 459 } else { 460 nfsstats.lookupcache_hits++; 461 if (cnp->cn_nameiop != LOOKUP && 462 (cnp->cn_flags&ISLASTCN)) 463 cnp->cn_flags |= SAVENAME; 464 return (0); 465 } 466 } 467 } else if (!nfs_getattr(vdp, &vattr, cnp->cn_cred, cnp->cn_proc) && 468 vattr.va_ctime.tv_sec == VTONFS(vdp)->n_ctime) { 469 nfsstats.lookupcache_hits++; 470 if (cnp->cn_nameiop != LOOKUP && (cnp->cn_flags&ISLASTCN)) 471 cnp->cn_flags |= SAVENAME; 472 return (0); 473 } 474 cache_purge(vdp); 475 } 476 vrele(vdp); 477 } 478 *vpp = NULLVP; 479 } 480 error = 0; 481 nfsstats.lookupcache_misses++; 482 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 483 len = cnp->cn_namelen; 484 nfsm_reqhead(dvp, NFSPROC_LOOKUP, NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len)); 485 486 /* 487 * For nqnfs optionally piggyback a getlease request for the name 488 * being looked up. 489 */ 490 if (nmp->nm_flag & NFSMNT_NQNFS) { 491 if ((nmp->nm_flag & NFSMNT_NQLOOKLEASE) && 492 ((cnp->cn_flags&MAKEENTRY) && (cnp->cn_nameiop != DELETE || !(cnp->cn_flags&ISLASTCN)))) { 493 nfsm_build(tl, u_long *, 2*NFSX_UNSIGNED); 494 *tl++ = txdr_unsigned(NQL_READ); 495 *tl = txdr_unsigned(nmp->nm_leaseterm); 496 } else { 497 nfsm_build(tl, u_long *, NFSX_UNSIGNED); 498 *tl = 0; 499 } 500 } 501 nfsm_fhtom(dvp); 502 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 503 reqtime = time.tv_sec; 504 nfsm_request(dvp, NFSPROC_LOOKUP, cnp->cn_proc, cnp->cn_cred); 505 nfsmout: 506 if (error) { 507 if ((cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME) && 508 (cnp->cn_flags & ISLASTCN) && error == ENOENT) 509 error = EJUSTRETURN; 510 if (cnp->cn_nameiop != LOOKUP && (cnp->cn_flags&ISLASTCN)) 511 cnp->cn_flags |= SAVENAME; 512 return (error); 513 } 514 if (nmp->nm_flag & NFSMNT_NQNFS) { 515 nfsm_dissect(tl, u_long *, NFSX_UNSIGNED); 516 if (*tl) { 517 nqlflag = fxdr_unsigned(int, *tl); 518 nfsm_dissect(tl, u_long *, 4*NFSX_UNSIGNED); 519 cachable = fxdr_unsigned(int, *tl++); 520 reqtime += fxdr_unsigned(int, *tl++); 521 fxdr_hyper(tl, &frev); 522 } else 523 nqlflag = 0; 524 } 525 nfsm_dissect(fhp, nfsv2fh_t *, NFSX_FH); 526 527 /* 528 * Handle RENAME case... 529 */ 530 if (cnp->cn_nameiop == RENAME && wantparent && (cnp->cn_flags&ISLASTCN)) { 531 if (!bcmp(np->n_fh.fh_bytes, (caddr_t)fhp, NFSX_FH)) { 532 m_freem(mrep); 533 return (EISDIR); 534 } 535 if (error = nfs_nget(dvp->v_mount, fhp, &np)) { 536 m_freem(mrep); 537 return (error); 538 } 539 newvp = NFSTOV(np); 540 if (error = 541 nfs_loadattrcache(&newvp, &md, &dpos, (struct vattr *)0)) { 542 vrele(newvp); 543 m_freem(mrep); 544 return (error); 545 } 546 *vpp = newvp; 547 m_freem(mrep); 548 cnp->cn_flags |= SAVENAME; 549 return (0); 550 } 551 552 if (!bcmp(np->n_fh.fh_bytes, (caddr_t)fhp, NFSX_FH)) { 553 VREF(dvp); 554 newvp = dvp; 555 } else { 556 if (error = nfs_nget(dvp->v_mount, fhp, &np)) { 557 m_freem(mrep); 558 return (error); 559 } 560 newvp = NFSTOV(np); 561 } 562 if (error = nfs_loadattrcache(&newvp, &md, &dpos, (struct vattr *)0)) { 563 vrele(newvp); 564 m_freem(mrep); 565 return (error); 566 } 567 m_freem(mrep); 568 *vpp = newvp; 569 if (cnp->cn_nameiop != LOOKUP && (cnp->cn_flags&ISLASTCN)) 570 cnp->cn_flags |= SAVENAME; 571 if ((cnp->cn_flags&MAKEENTRY) && (cnp->cn_nameiop != DELETE || !(cnp->cn_flags&ISLASTCN))) { 572 if ((nmp->nm_flag & NFSMNT_NQNFS) == 0) 573 np->n_ctime = np->n_vattr.va_ctime.tv_sec; 574 else if (nqlflag && reqtime > time.tv_sec) { 575 if (np->n_tnext) { 576 if (np->n_tnext == (struct nfsnode *)nmp) 577 nmp->nm_tprev = np->n_tprev; 578 else 579 np->n_tnext->n_tprev = np->n_tprev; 580 if (np->n_tprev == (struct nfsnode *)nmp) 581 nmp->nm_tnext = np->n_tnext; 582 else 583 np->n_tprev->n_tnext = np->n_tnext; 584 if (nqlflag == NQL_WRITE) 585 np->n_flag |= NQNFSWRITE; 586 } else if (nqlflag == NQL_READ) 587 np->n_flag &= ~NQNFSWRITE; 588 else 589 np->n_flag |= NQNFSWRITE; 590 if (cachable) 591 np->n_flag &= ~NQNFSNONCACHE; 592 else 593 np->n_flag |= NQNFSNONCACHE; 594 np->n_expiry = reqtime; 595 np->n_lrev = frev; 596 tp = nmp->nm_tprev; 597 while (tp != (struct nfsnode *)nmp && tp->n_expiry > np->n_expiry) 598 tp = tp->n_tprev; 599 if (tp == (struct nfsnode *)nmp) { 600 np->n_tnext = nmp->nm_tnext; 601 nmp->nm_tnext = np; 602 } else { 603 np->n_tnext = tp->n_tnext; 604 tp->n_tnext = np; 605 } 606 np->n_tprev = tp; 607 if (np->n_tnext == (struct nfsnode *)nmp) 608 nmp->nm_tprev = np; 609 else 610 np->n_tnext->n_tprev = np; 611 } 612 cache_enter(dvp, *vpp, cnp); 613 } 614 return (0); 615 } 616 617 /* 618 * nfs read call. 619 * Just call nfs_bioread() to do the work. 620 */ 621 int 622 nfs_read(vp, uiop, ioflag, cred) 623 register struct vnode *vp; 624 struct uio *uiop; 625 int ioflag; 626 struct ucred *cred; 627 { 628 if (vp->v_type != VREG) 629 return (EPERM); 630 return (nfs_bioread(vp, uiop, ioflag, cred)); 631 } 632 633 /* 634 * nfs readlink call 635 */ 636 int 637 nfs_readlink(vp, uiop, cred) 638 struct vnode *vp; 639 struct uio *uiop; 640 struct ucred *cred; 641 { 642 if (vp->v_type != VLNK) 643 return (EPERM); 644 return (nfs_bioread(vp, uiop, 0, cred)); 645 } 646 647 /* 648 * Do a readlink rpc. 649 * Called by nfs_doio() from below the buffer cache. 650 */ 651 int 652 nfs_readlinkrpc(vp, uiop, cred) 653 register struct vnode *vp; 654 struct uio *uiop; 655 struct ucred *cred; 656 { 657 register u_long *tl; 658 register caddr_t cp; 659 register long t1; 660 caddr_t bpos, dpos, cp2; 661 int error = 0; 662 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 663 long len; 664 665 nfsstats.rpccnt[NFSPROC_READLINK]++; 666 nfsm_reqhead(vp, NFSPROC_READLINK, NFSX_FH); 667 nfsm_fhtom(vp); 668 nfsm_request(vp, NFSPROC_READLINK, uiop->uio_procp, cred); 669 nfsm_strsiz(len, NFS_MAXPATHLEN); 670 nfsm_mtouio(uiop, len); 671 nfsm_reqdone; 672 return (error); 673 } 674 675 /* 676 * nfs read rpc call 677 * Ditto above 678 */ 679 int 680 nfs_readrpc(vp, uiop, cred) 681 register struct vnode *vp; 682 struct uio *uiop; 683 struct ucred *cred; 684 { 685 register u_long *tl; 686 register caddr_t cp; 687 register long t1; 688 caddr_t bpos, dpos, cp2; 689 int error = 0; 690 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 691 struct nfsmount *nmp; 692 long len, retlen, tsiz; 693 694 nmp = VFSTONFS(vp->v_mount); 695 tsiz = uiop->uio_resid; 696 while (tsiz > 0) { 697 nfsstats.rpccnt[NFSPROC_READ]++; 698 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz; 699 nfsm_reqhead(vp, NFSPROC_READ, NFSX_FH+NFSX_UNSIGNED*3); 700 nfsm_fhtom(vp); 701 nfsm_build(tl, u_long *, NFSX_UNSIGNED*3); 702 *tl++ = txdr_unsigned(uiop->uio_offset); 703 *tl++ = txdr_unsigned(len); 704 *tl = 0; 705 nfsm_request(vp, NFSPROC_READ, uiop->uio_procp, cred); 706 nfsm_loadattr(vp, (struct vattr *)0); 707 nfsm_strsiz(retlen, nmp->nm_rsize); 708 nfsm_mtouio(uiop, retlen); 709 m_freem(mrep); 710 if (retlen < len) 711 tsiz = 0; 712 else 713 tsiz -= len; 714 } 715 nfsmout: 716 return (error); 717 } 718 719 /* 720 * nfs write call 721 */ 722 int 723 nfs_writerpc(vp, uiop, cred) 724 register struct vnode *vp; 725 struct uio *uiop; 726 struct ucred *cred; 727 { 728 register u_long *tl; 729 register caddr_t cp; 730 register long t1; 731 caddr_t bpos, dpos, cp2; 732 int error = 0; 733 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 734 struct nfsmount *nmp; 735 struct nfsnode *np = VTONFS(vp); 736 u_quad_t frev; 737 long len, tsiz; 738 739 nmp = VFSTONFS(vp->v_mount); 740 tsiz = uiop->uio_resid; 741 while (tsiz > 0) { 742 nfsstats.rpccnt[NFSPROC_WRITE]++; 743 len = (tsiz > nmp->nm_wsize) ? nmp->nm_wsize : tsiz; 744 nfsm_reqhead(vp, NFSPROC_WRITE, 745 NFSX_FH+NFSX_UNSIGNED*4+nfsm_rndup(len)); 746 nfsm_fhtom(vp); 747 nfsm_build(tl, u_long *, NFSX_UNSIGNED*4); 748 *(tl+1) = txdr_unsigned(uiop->uio_offset); 749 *(tl+3) = txdr_unsigned(len); 750 nfsm_uiotom(uiop, len); 751 nfsm_request(vp, NFSPROC_WRITE, uiop->uio_procp, cred); 752 nfsm_loadattr(vp, (struct vattr *)0); 753 if (nmp->nm_flag & NFSMNT_MYWRITE) 754 VTONFS(vp)->n_mtime = VTONFS(vp)->n_vattr.va_mtime.tv_sec; 755 else if ((nmp->nm_flag & NFSMNT_NQNFS) && 756 NQNFS_CKCACHABLE(vp, NQL_WRITE)) { 757 nfsm_dissect(tl, u_long *, 2*NFSX_UNSIGNED); 758 fxdr_hyper(tl, &frev); 759 if (QUADGT(frev, np->n_brev)) 760 np->n_brev = frev; 761 } 762 m_freem(mrep); 763 tsiz -= len; 764 } 765 nfsmout: 766 if (error) 767 uiop->uio_resid = tsiz; 768 return (error); 769 } 770 771 /* 772 * nfs mknod call 773 * This is a kludge. Use a create rpc but with the IFMT bits of the mode 774 * set to specify the file type and the size field for rdev. 775 */ 776 /* ARGSUSED */ 777 int 778 nfs_mknod(dvp, vpp, cnp, vap) 779 struct vnode *dvp; 780 struct vnode **vpp; 781 struct componentname *cnp; 782 struct vattr *vap; 783 { 784 register struct nfsv2_sattr *sp; 785 register u_long *tl; 786 register caddr_t cp; 787 register long t2; 788 caddr_t bpos, dpos; 789 int error = 0; 790 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 791 u_long rdev; 792 793 if (vap->va_type == VCHR || vap->va_type == VBLK) 794 rdev = txdr_unsigned(vap->va_rdev); 795 #ifdef FIFO 796 else if (vap->va_type == VFIFO) 797 rdev = 0xffffffff; 798 #endif /* FIFO */ 799 else { 800 VOP_ABORTOP(dvp, cnp); 801 vput(dvp); 802 return (EOPNOTSUPP); 803 } 804 nfsstats.rpccnt[NFSPROC_CREATE]++; 805 nfsm_reqhead(dvp, NFSPROC_CREATE, 806 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(cnp->cn_namelen)+NFSX_SATTR); 807 nfsm_fhtom(dvp); 808 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 809 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 810 sp->sa_mode = vtonfs_mode(vap->va_type, vap->va_mode); 811 sp->sa_uid = txdr_unsigned(cnp->cn_cred->cr_uid); 812 sp->sa_gid = txdr_unsigned(cnp->cn_cred->cr_gid); 813 sp->sa_size = rdev; 814 /* or should these be VNOVAL ?? */ 815 txdr_time(&vap->va_atime, &sp->sa_atime); 816 txdr_time(&vap->va_mtime, &sp->sa_mtime); 817 nfsm_request(dvp, NFSPROC_CREATE, cnp->cn_proc, cnp->cn_cred); 818 nfsm_reqdone; 819 FREE(cnp->cn_pnbuf, M_NAMEI); 820 VTONFS(dvp)->n_flag |= NMODIFIED; 821 vrele(dvp); 822 return (error); 823 } 824 825 /* 826 * nfs file create call 827 */ 828 int 829 nfs_create(dvp, vpp, cnp, vap) 830 struct vnode *dvp; 831 struct vnode **vpp; 832 struct componentname *cnp; 833 struct vattr *vap; 834 { 835 register struct nfsv2_sattr *sp; 836 register u_long *tl; 837 register caddr_t cp; 838 register long t1, t2; 839 caddr_t bpos, dpos, cp2; 840 int error = 0; 841 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 842 843 nfsstats.rpccnt[NFSPROC_CREATE]++; 844 nfsm_reqhead(dvp, NFSPROC_CREATE, 845 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(cnp->cn_namelen)+NFSX_SATTR); 846 nfsm_fhtom(dvp); 847 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 848 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 849 sp->sa_mode = vtonfs_mode(vap->va_type, vap->va_mode); 850 sp->sa_uid = txdr_unsigned(cnp->cn_cred->cr_uid); 851 sp->sa_gid = txdr_unsigned(cnp->cn_cred->cr_gid); 852 sp->sa_size = txdr_unsigned(0); 853 /* or should these be VNOVAL ?? */ 854 txdr_time(&vap->va_atime, &sp->sa_atime); 855 txdr_time(&vap->va_mtime, &sp->sa_mtime); 856 nfsm_request(dvp, NFSPROC_CREATE, cnp->cn_proc, cnp->cn_cred); 857 nfsm_mtofh(dvp, *vpp); 858 nfsm_reqdone; 859 FREE(cnp->cn_pnbuf, M_NAMEI); 860 VTONFS(dvp)->n_flag |= NMODIFIED; 861 vrele(dvp); 862 return (error); 863 } 864 865 /* 866 * nfs file remove call 867 * To try and make nfs semantics closer to ufs semantics, a file that has 868 * other processes using the vnode is renamed instead of removed and then 869 * removed later on the last close. 870 * - If v_usecount > 1 871 * If a rename is not already in the works 872 * call nfs_sillyrename() to set it up 873 * else 874 * do the remove rpc 875 */ 876 int 877 nfs_remove(dvp, vp, cnp) 878 struct vnode *dvp, *vp; 879 struct componentname *cnp; 880 { 881 register struct nfsnode *np = VTONFS(vp); 882 register u_long *tl; 883 register caddr_t cp; 884 register long t2; 885 caddr_t bpos, dpos; 886 int error = 0; 887 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 888 889 if (vp->v_usecount > 1) { 890 if (!np->n_sillyrename) 891 error = nfs_sillyrename(dvp, vp, cnp); 892 } else { 893 /* 894 * Purge the name cache so that the chance of a lookup for 895 * the name succeeding while the remove is in progress is 896 * minimized. Without node locking it can still happen, such 897 * that an I/O op returns ESTALE, but since you get this if 898 * another host removes the file.. 899 */ 900 cache_purge(vp); 901 /* 902 * Throw away biocache buffers. Mainly to avoid 903 * unnecessary delayed writes. 904 */ 905 vinvalbuf(vp, FALSE); 906 /* Do the rpc */ 907 nfsstats.rpccnt[NFSPROC_REMOVE]++; 908 nfsm_reqhead(dvp, NFSPROC_REMOVE, 909 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(cnp->cn_namelen)); 910 nfsm_fhtom(dvp); 911 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 912 nfsm_request(dvp, NFSPROC_REMOVE, cnp->cn_proc, cnp->cn_cred); 913 nfsm_reqdone; 914 FREE(cnp->cn_pnbuf, M_NAMEI); 915 VTONFS(dvp)->n_flag |= NMODIFIED; 916 /* 917 * Kludge City: If the first reply to the remove rpc is lost.. 918 * the reply to the retransmitted request will be ENOENT 919 * since the file was in fact removed 920 * Therefore, we cheat and return success. 921 */ 922 if (error == ENOENT) 923 error = 0; 924 } 925 np->n_attrstamp = 0; 926 vrele(dvp); 927 vrele(vp); 928 return (error); 929 } 930 931 /* 932 * nfs file remove rpc called from nfs_inactive 933 */ 934 int 935 nfs_removeit(sp, procp) 936 register struct sillyrename *sp; 937 struct proc *procp; 938 { 939 register u_long *tl; 940 register caddr_t cp; 941 register long t2; 942 caddr_t bpos, dpos; 943 int error = 0; 944 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 945 946 nfsstats.rpccnt[NFSPROC_REMOVE]++; 947 nfsm_reqhead(sp->s_dvp, NFSPROC_REMOVE, 948 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(sp->s_namlen)); 949 nfsm_fhtom(sp->s_dvp); 950 nfsm_strtom(sp->s_name, sp->s_namlen, NFS_MAXNAMLEN); 951 nfsm_request(sp->s_dvp, NFSPROC_REMOVE, procp, sp->s_cred); 952 nfsm_reqdone; 953 VTONFS(sp->s_dvp)->n_flag |= NMODIFIED; 954 return (error); 955 } 956 957 /* 958 * nfs file rename call 959 */ 960 int 961 nfs_rename(fdvp, fvp, fcnp, 962 tdvp, tvp, tcnp) 963 struct vnode *fdvp, *fvp; 964 struct componentname *fcnp; 965 struct vnode *tdvp, *tvp; 966 struct componentname *tcnp; 967 { 968 register u_long *tl; 969 register caddr_t cp; 970 register long t2; 971 caddr_t bpos, dpos; 972 int error = 0; 973 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 974 975 nfsstats.rpccnt[NFSPROC_RENAME]++; 976 nfsm_reqhead(fdvp, NFSPROC_RENAME, 977 (NFSX_FH+NFSX_UNSIGNED)*2+nfsm_rndup(fcnp->cn_namelen)+ 978 nfsm_rndup(fcnp->cn_namelen)); /* or fcnp->cn_cred?*/ 979 nfsm_fhtom(fdvp); 980 nfsm_strtom(fcnp->cn_nameptr, fcnp->cn_namelen, NFS_MAXNAMLEN); 981 nfsm_fhtom(tdvp); 982 nfsm_strtom(tcnp->cn_nameptr, tcnp->cn_namelen, NFS_MAXNAMLEN); 983 nfsm_request(fdvp, NFSPROC_RENAME, tcnp->cn_proc, tcnp->cn_cred); 984 nfsm_reqdone; 985 VTONFS(fdvp)->n_flag |= NMODIFIED; 986 VTONFS(tdvp)->n_flag |= NMODIFIED; 987 if (fvp->v_type == VDIR) { 988 if (tvp != NULL && tvp->v_type == VDIR) 989 cache_purge(tdvp); 990 cache_purge(fdvp); 991 } 992 if (tdvp == tvp) 993 vrele(tdvp); 994 else 995 vput(tdvp); 996 if (tvp) 997 vput(tvp); 998 vrele(fdvp); 999 vrele(fvp); 1000 /* 1001 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry. 1002 */ 1003 if (error == ENOENT) 1004 error = 0; 1005 return (error); 1006 } 1007 1008 /* 1009 * nfs file rename rpc called from nfs_remove() above 1010 */ 1011 int 1012 nfs_renameit(sdvp, scnp, sp) 1013 struct vnode *sdvp; 1014 struct componentname *scnp; 1015 register struct sillyrename *sp; 1016 { 1017 register u_long *tl; 1018 register caddr_t cp; 1019 register long t2; 1020 caddr_t bpos, dpos; 1021 int error = 0; 1022 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1023 1024 nfsstats.rpccnt[NFSPROC_RENAME]++; 1025 nfsm_reqhead(sdvp, NFSPROC_RENAME, 1026 (NFSX_FH+NFSX_UNSIGNED)*2+nfsm_rndup(scnp->cn_namelen)+ 1027 nfsm_rndup(sp->s_namlen)); 1028 nfsm_fhtom(sdvp); 1029 nfsm_strtom(scnp->cn_nameptr, scnp->cn_namelen, NFS_MAXNAMLEN); 1030 nfsm_fhtom(sdvp); 1031 nfsm_strtom(sp->s_name, sp->s_namlen, NFS_MAXNAMLEN); 1032 nfsm_request(sdvp, NFSPROC_RENAME, scnp->cn_proc, scnp->cn_cred); 1033 nfsm_reqdone; 1034 FREE(scnp->cn_pnbuf, M_NAMEI); 1035 VTONFS(sdvp)->n_flag |= NMODIFIED; 1036 return (error); 1037 } 1038 1039 /* 1040 * nfs hard link create call 1041 */ 1042 int 1043 nfs_link(tdvp, vp, cnp) 1044 struct vnode *tdvp; 1045 register struct vnode *vp; /* source vnode */ 1046 struct componentname *cnp; 1047 { 1048 register u_long *tl; 1049 register caddr_t cp; 1050 register long t2; 1051 caddr_t bpos, dpos; 1052 int error = 0; 1053 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1054 1055 nfsstats.rpccnt[NFSPROC_LINK]++; 1056 nfsm_reqhead(vp, NFSPROC_LINK, 1057 NFSX_FH*2+NFSX_UNSIGNED+nfsm_rndup(cnp->cn_namelen)); 1058 nfsm_fhtom(vp); 1059 nfsm_fhtom(tdvp); 1060 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1061 nfsm_request(vp, NFSPROC_LINK, cnp->cn_proc, cnp->cn_cred); 1062 nfsm_reqdone; 1063 FREE(cnp->cn_pnbuf, M_NAMEI); 1064 VTONFS(vp)->n_attrstamp = 0; 1065 VTONFS(tdvp)->n_flag |= NMODIFIED; 1066 vrele(tdvp); 1067 /* 1068 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 1069 */ 1070 if (error == EEXIST) 1071 error = 0; 1072 return (error); 1073 } 1074 1075 /* 1076 * nfs symbolic link create call 1077 */ 1078 /* start here */ 1079 int 1080 nfs_symlink(dvp, vpp, cnp, vap, nm) 1081 struct vnode *dvp; 1082 struct vnode **vpp; 1083 struct componentname *cnp; 1084 struct vattr *vap; 1085 char *nm; 1086 { 1087 register struct nfsv2_sattr *sp; 1088 register u_long *tl; 1089 register caddr_t cp; 1090 register long t2; 1091 caddr_t bpos, dpos; 1092 int slen, error = 0; 1093 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1094 1095 nfsstats.rpccnt[NFSPROC_SYMLINK]++; 1096 slen = strlen(nm); 1097 nfsm_reqhead(dvp, NFSPROC_SYMLINK, 1098 NFSX_FH+2*NFSX_UNSIGNED+nfsm_rndup(cnp->cn_namelen)+nfsm_rndup(slen)+NFSX_SATTR); 1099 nfsm_fhtom(dvp); 1100 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1101 nfsm_strtom(nm, slen, NFS_MAXPATHLEN); 1102 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 1103 sp->sa_mode = vtonfs_mode(VLNK, vap->va_mode); 1104 sp->sa_uid = txdr_unsigned(cnp->cn_cred->cr_uid); 1105 sp->sa_gid = txdr_unsigned(cnp->cn_cred->cr_gid); 1106 sp->sa_size = txdr_unsigned(VNOVAL); 1107 txdr_time(&vap->va_atime, &sp->sa_atime); /* or VNOVAL ?? */ 1108 txdr_time(&vap->va_mtime, &sp->sa_mtime); /* or VNOVAL ?? */ 1109 nfsm_request(dvp, NFSPROC_SYMLINK, cnp->cn_proc, cnp->cn_cred); 1110 nfsm_reqdone; 1111 FREE(cnp->cn_pnbuf, M_NAMEI); 1112 VTONFS(dvp)->n_flag |= NMODIFIED; 1113 vrele(dvp); 1114 /* 1115 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 1116 */ 1117 if (error == EEXIST) 1118 error = 0; 1119 return (error); 1120 } 1121 1122 /* 1123 * nfs make dir call 1124 */ 1125 int 1126 nfs_mkdir(dvp, vpp, cnp, vap) 1127 struct vnode *dvp; 1128 struct vnode **vpp; 1129 struct componentname *cnp; 1130 struct vattr *vap; 1131 { 1132 register struct nfsv2_sattr *sp; 1133 register u_long *tl; 1134 register caddr_t cp; 1135 register long t1, t2; 1136 register int len; 1137 caddr_t bpos, dpos, cp2; 1138 int error = 0, firsttry = 1; 1139 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1140 1141 len = cnp->cn_namelen; 1142 nfsstats.rpccnt[NFSPROC_MKDIR]++; 1143 nfsm_reqhead(dvp, NFSPROC_MKDIR, 1144 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len)+NFSX_SATTR); 1145 nfsm_fhtom(dvp); 1146 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 1147 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 1148 sp->sa_mode = vtonfs_mode(VDIR, vap->va_mode); 1149 sp->sa_uid = txdr_unsigned(cnp->cn_cred->cr_uid); 1150 sp->sa_gid = txdr_unsigned(cnp->cn_cred->cr_gid); 1151 sp->sa_size = txdr_unsigned(VNOVAL); 1152 txdr_time(&vap->va_atime, &sp->sa_atime); /* or VNOVAL ?? */ 1153 txdr_time(&vap->va_mtime, &sp->sa_mtime); /* or VNOVAL ?? */ 1154 nfsm_request(dvp, NFSPROC_MKDIR, cnp->cn_proc, cnp->cn_cred); 1155 nfsm_mtofh(dvp, *vpp); 1156 nfsm_reqdone; 1157 VTONFS(dvp)->n_flag |= NMODIFIED; 1158 /* 1159 * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry 1160 * if we can succeed in looking up the directory. 1161 * "firsttry" is necessary since the macros may "goto nfsmout" which 1162 * is above the if on errors. (Ugh) 1163 */ 1164 if (error == EEXIST && firsttry) { 1165 firsttry = 0; 1166 error = 0; 1167 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 1168 *vpp = NULL; 1169 nfsm_reqhead(dvp, NFSPROC_LOOKUP, 1170 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len)); 1171 nfsm_fhtom(dvp); 1172 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 1173 nfsm_request(dvp, NFSPROC_LOOKUP, cnp->cn_proc, cnp->cn_cred); 1174 nfsm_mtofh(dvp, *vpp); 1175 if ((*vpp)->v_type != VDIR) { 1176 vput(*vpp); 1177 error = EEXIST; 1178 } 1179 m_freem(mrep); 1180 } 1181 FREE(cnp->cn_pnbuf, M_NAMEI); 1182 vrele(dvp); 1183 return (error); 1184 } 1185 1186 /* 1187 * nfs remove directory call 1188 */ 1189 int 1190 nfs_rmdir(dvp, vp, cnp) 1191 struct vnode *dvp, *vp; 1192 struct componentname *cnp; 1193 { 1194 register u_long *tl; 1195 register caddr_t cp; 1196 register long t2; 1197 caddr_t bpos, dpos; 1198 int error = 0; 1199 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1200 1201 if (dvp == vp) { 1202 vrele(dvp); 1203 vrele(dvp); 1204 FREE(cnp->cn_pnbuf, M_NAMEI); 1205 return (EINVAL); 1206 } 1207 nfsstats.rpccnt[NFSPROC_RMDIR]++; 1208 nfsm_reqhead(dvp, NFSPROC_RMDIR, 1209 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(cnp->cn_namelen)); 1210 nfsm_fhtom(dvp); 1211 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1212 nfsm_request(dvp, NFSPROC_RMDIR, cnp->cn_proc, cnp->cn_cred); 1213 nfsm_reqdone; 1214 FREE(cnp->cn_pnbuf, M_NAMEI); 1215 VTONFS(dvp)->n_flag |= NMODIFIED; 1216 cache_purge(dvp); 1217 cache_purge(vp); 1218 vrele(vp); 1219 vrele(dvp); 1220 /* 1221 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry. 1222 */ 1223 if (error == ENOENT) 1224 error = 0; 1225 return (error); 1226 } 1227 1228 /* 1229 * nfs readdir call 1230 * Although cookie is defined as opaque, I translate it to/from net byte 1231 * order so that it looks more sensible. This appears consistent with the 1232 * Ultrix implementation of NFS. 1233 */ 1234 int 1235 nfs_readdir(vp, uiop, cred, eofflagp) 1236 register struct vnode *vp; 1237 struct uio *uiop; 1238 struct ucred *cred; 1239 int *eofflagp; 1240 { 1241 register struct nfsnode *np = VTONFS(vp); 1242 int tresid, error; 1243 struct vattr vattr; 1244 1245 if (vp->v_type != VDIR) 1246 return (EPERM); 1247 /* 1248 * First, check for hit on the EOF offset cache 1249 */ 1250 if (uiop->uio_offset != 0 && uiop->uio_offset == np->n_direofoffset && 1251 (np->n_flag & NMODIFIED) == 0) { 1252 if (VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS) { 1253 if (NQNFS_CKCACHABLE(vp, NQL_READ)) { 1254 *eofflagp = 1; 1255 nfsstats.direofcache_hits++; 1256 return (0); 1257 } 1258 } else if (nfs_getattr(vp, &vattr, cred, uiop->uio_procp) == 0 && 1259 np->n_mtime == vattr.va_mtime.tv_sec) { 1260 *eofflagp = 1; 1261 nfsstats.direofcache_hits++; 1262 return (0); 1263 } 1264 } 1265 1266 /* 1267 * Call nfs_bioread() to do the real work. 1268 */ 1269 tresid = uiop->uio_resid; 1270 error = nfs_bioread(vp, uiop, 0, cred); 1271 1272 if (!error && uiop->uio_resid == tresid) { 1273 *eofflagp = 1; 1274 nfsstats.direofcache_misses++; 1275 } else 1276 *eofflagp = 0; 1277 return (error); 1278 } 1279 1280 /* 1281 * Readdir rpc call. 1282 * Called from below the buffer cache by nfs_doio(). 1283 */ 1284 int 1285 nfs_readdirrpc(vp, uiop, cred) 1286 register struct vnode *vp; 1287 struct uio *uiop; 1288 struct ucred *cred; 1289 { 1290 register long len; 1291 register struct readdir *dp; 1292 register u_long *tl; 1293 register caddr_t cp; 1294 register long t1; 1295 long tlen, lastlen; 1296 caddr_t bpos, dpos, cp2; 1297 int error = 0; 1298 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1299 struct mbuf *md2; 1300 caddr_t dpos2; 1301 int siz; 1302 int more_dirs = 1; 1303 off_t off, savoff; 1304 struct readdir *savdp; 1305 struct nfsmount *nmp; 1306 struct nfsnode *np = VTONFS(vp); 1307 long tresid; 1308 1309 nmp = VFSTONFS(vp->v_mount); 1310 tresid = uiop->uio_resid; 1311 /* 1312 * Loop around doing readdir rpc's of size uio_resid or nm_rsize, 1313 * whichever is smaller, truncated to a multiple of NFS_DIRBLKSIZ. 1314 * The stopping criteria is EOF or buffer full. 1315 */ 1316 while (more_dirs && uiop->uio_resid >= NFS_DIRBLKSIZ) { 1317 nfsstats.rpccnt[NFSPROC_READDIR]++; 1318 nfsm_reqhead(vp, NFSPROC_READDIR, 1319 NFSX_FH+2*NFSX_UNSIGNED); 1320 nfsm_fhtom(vp); 1321 nfsm_build(tl, u_long *, 2*NFSX_UNSIGNED); 1322 *tl++ = txdr_unsigned(uiop->uio_offset); 1323 *tl = txdr_unsigned(((uiop->uio_resid > nmp->nm_rsize) ? 1324 nmp->nm_rsize : uiop->uio_resid) & ~(NFS_DIRBLKSIZ-1)); 1325 nfsm_request(vp, NFSPROC_READDIR, uiop->uio_procp, cred); 1326 siz = 0; 1327 nfsm_dissect(tl, u_long *, NFSX_UNSIGNED); 1328 more_dirs = fxdr_unsigned(int, *tl); 1329 1330 /* Save the position so that we can do nfsm_mtouio() later */ 1331 dpos2 = dpos; 1332 md2 = md; 1333 1334 /* loop thru the dir entries, doctoring them to 4bsd form */ 1335 off = uiop->uio_offset; 1336 #ifdef lint 1337 dp = (struct readdir *)0; 1338 #endif /* lint */ 1339 while (more_dirs && siz < uiop->uio_resid) { 1340 savoff = off; /* Hold onto offset and dp */ 1341 savdp = dp; 1342 nfsm_dissecton(tl, u_long *, 2*NFSX_UNSIGNED); 1343 dp = (struct readdir *)tl; 1344 dp->d_ino = fxdr_unsigned(u_long, *tl++); 1345 len = fxdr_unsigned(int, *tl); 1346 if (len <= 0 || len > NFS_MAXNAMLEN) { 1347 error = EBADRPC; 1348 m_freem(mrep); 1349 goto nfsmout; 1350 } 1351 dp->d_namlen = (u_short)len; 1352 nfsm_adv(len); /* Point past name */ 1353 tlen = nfsm_rndup(len); 1354 /* 1355 * This should not be necessary, but some servers have 1356 * broken XDR such that these bytes are not null filled. 1357 */ 1358 if (tlen != len) { 1359 *dpos = '\0'; /* Null-terminate */ 1360 nfsm_adv(tlen - len); 1361 len = tlen; 1362 } 1363 nfsm_dissecton(tl, u_long *, 2*NFSX_UNSIGNED); 1364 off = fxdr_unsigned(off_t, *tl); 1365 *tl++ = 0; /* Ensures null termination of name */ 1366 more_dirs = fxdr_unsigned(int, *tl); 1367 dp->d_reclen = len+4*NFSX_UNSIGNED; 1368 siz += dp->d_reclen; 1369 } 1370 /* 1371 * If at end of rpc data, get the eof boolean 1372 */ 1373 if (!more_dirs) { 1374 nfsm_dissecton(tl, u_long *, NFSX_UNSIGNED); 1375 more_dirs = (fxdr_unsigned(int, *tl) == 0); 1376 1377 /* 1378 * If at EOF, cache directory offset 1379 */ 1380 if (!more_dirs) 1381 np->n_direofoffset = off; 1382 } 1383 /* 1384 * If there is too much to fit in the data buffer, use savoff and 1385 * savdp to trim off the last record. 1386 * --> we are not at eof 1387 */ 1388 if (siz > uiop->uio_resid) { 1389 off = savoff; 1390 siz -= dp->d_reclen; 1391 dp = savdp; 1392 more_dirs = 0; /* Paranoia */ 1393 } 1394 if (siz > 0) { 1395 lastlen = dp->d_reclen; 1396 md = md2; 1397 dpos = dpos2; 1398 nfsm_mtouio(uiop, siz); 1399 uiop->uio_offset = off; 1400 } else 1401 more_dirs = 0; /* Ugh, never happens, but in case.. */ 1402 m_freem(mrep); 1403 } 1404 /* 1405 * Fill last record, iff any, out to a multiple of NFS_DIRBLKSIZ 1406 * by increasing d_reclen for the last record. 1407 */ 1408 if (uiop->uio_resid < tresid) { 1409 len = uiop->uio_resid & (NFS_DIRBLKSIZ - 1); 1410 if (len > 0) { 1411 dp = (struct readdir *) 1412 (uiop->uio_iov->iov_base - lastlen); 1413 dp->d_reclen += len; 1414 uiop->uio_iov->iov_base += len; 1415 uiop->uio_iov->iov_len -= len; 1416 uiop->uio_resid -= len; 1417 } 1418 } 1419 nfsmout: 1420 return (error); 1421 } 1422 1423 /* 1424 * Nqnfs readdir_and_lookup RPC. Used in place of nfs_readdirrpc() when 1425 * the "rdirlook" mount option is specified. 1426 */ 1427 int 1428 nfs_readdirlookrpc(vp, uiop, cred) 1429 struct vnode *vp; 1430 register struct uio *uiop; 1431 struct ucred *cred; 1432 { 1433 register int len; 1434 register struct readdir *dp; 1435 register u_long *tl; 1436 register caddr_t cp; 1437 register long t1; 1438 caddr_t bpos, dpos, cp2; 1439 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1440 struct nameidata nami, *ndp = &nami; 1441 struct componentname *cnp = &ndp->ni_cnd; 1442 off_t off, endoff; 1443 time_t reqtime, ltime; 1444 struct nfsmount *nmp; 1445 struct nfsnode *np, *tp; 1446 struct vnode *newvp; 1447 nfsv2fh_t *fhp; 1448 u_long fileno; 1449 u_quad_t frev; 1450 int error = 0, tlen, more_dirs = 1, tresid, doit, bigenough, i; 1451 int cachable; 1452 1453 if (uiop->uio_iovcnt != 1) 1454 panic("nfs rdirlook"); 1455 nmp = VFSTONFS(vp->v_mount); 1456 tresid = uiop->uio_resid; 1457 ndp->ni_dvp = vp; 1458 newvp = NULLVP; 1459 /* 1460 * Loop around doing readdir rpc's of size uio_resid or nm_rsize, 1461 * whichever is smaller, truncated to a multiple of NFS_DIRBLKSIZ. 1462 * The stopping criteria is EOF or buffer full. 1463 */ 1464 while (more_dirs && uiop->uio_resid >= NFS_DIRBLKSIZ) { 1465 nfsstats.rpccnt[NQNFSPROC_READDIRLOOK]++; 1466 nfsm_reqhead(vp, NQNFSPROC_READDIRLOOK, 1467 NFSX_FH+3*NFSX_UNSIGNED); 1468 nfsm_fhtom(vp); 1469 nfsm_build(tl, u_long *, 3*NFSX_UNSIGNED); 1470 *tl++ = txdr_unsigned(uiop->uio_offset); 1471 *tl++ = txdr_unsigned(((uiop->uio_resid > nmp->nm_rsize) ? 1472 nmp->nm_rsize : uiop->uio_resid) & ~(NFS_DIRBLKSIZ-1)); 1473 *tl = txdr_unsigned(nmp->nm_leaseterm); 1474 reqtime = time.tv_sec; 1475 nfsm_request(vp, NQNFSPROC_READDIRLOOK, uiop->uio_procp, cred); 1476 nfsm_dissect(tl, u_long *, NFSX_UNSIGNED); 1477 more_dirs = fxdr_unsigned(int, *tl); 1478 1479 /* loop thru the dir entries, doctoring them to 4bsd form */ 1480 off = uiop->uio_offset; 1481 bigenough = 1; 1482 while (more_dirs && bigenough) { 1483 doit = 1; 1484 nfsm_dissect(tl, u_long *, 4*NFSX_UNSIGNED); 1485 cachable = fxdr_unsigned(int, *tl++); 1486 ltime = reqtime + fxdr_unsigned(int, *tl++); 1487 fxdr_hyper(tl, &frev); 1488 nfsm_dissect(fhp, nfsv2fh_t *, NFSX_FH); 1489 if (!bcmp(VTONFS(vp)->n_fh.fh_bytes, (caddr_t)fhp, NFSX_FH)) { 1490 VREF(vp); 1491 newvp = vp; 1492 np = VTONFS(vp); 1493 } else { 1494 if (error = nfs_nget(vp->v_mount, fhp, &np)) 1495 doit = 0; 1496 newvp = NFSTOV(np); 1497 } 1498 if (error = nfs_loadattrcache(&newvp, &md, &dpos, 1499 (struct vattr *)0)) 1500 doit = 0; 1501 nfsm_dissect(tl, u_long *, 2*NFSX_UNSIGNED); 1502 fileno = fxdr_unsigned(u_long, *tl++); 1503 len = fxdr_unsigned(int, *tl); 1504 if (len <= 0 || len > NFS_MAXNAMLEN) { 1505 error = EBADRPC; 1506 m_freem(mrep); 1507 goto nfsmout; 1508 } 1509 tlen = (len + 4) & ~0x3; 1510 if ((tlen + DIRHDSIZ) > uiop->uio_resid) 1511 bigenough = 0; 1512 if (bigenough && doit) { 1513 dp = (struct readdir *)uiop->uio_iov->iov_base; 1514 dp->d_ino = fileno; 1515 dp->d_namlen = len; 1516 dp->d_reclen = tlen + DIRHDSIZ; 1517 uiop->uio_resid -= DIRHDSIZ; 1518 uiop->uio_iov->iov_base += DIRHDSIZ; 1519 uiop->uio_iov->iov_len -= DIRHDSIZ; 1520 cnp->cn_nameptr = uiop->uio_iov->iov_base; 1521 cnp->cn_namelen = len; 1522 ndp->ni_vp = newvp; 1523 nfsm_mtouio(uiop, len); 1524 cp = uiop->uio_iov->iov_base; 1525 tlen -= len; 1526 for (i = 0; i < tlen; i++) 1527 *cp++ = '\0'; 1528 uiop->uio_iov->iov_base += tlen; 1529 uiop->uio_iov->iov_len -= tlen; 1530 uiop->uio_resid -= tlen; 1531 cnp->cn_hash = 0; 1532 for (cp = cnp->cn_nameptr, i = 1; i <= len; i++, cp++) 1533 cnp->cn_hash += (unsigned char)*cp * i; 1534 if (ltime > time.tv_sec) { 1535 if (np->n_tnext) { 1536 if (np->n_tnext == (struct nfsnode *)nmp) 1537 nmp->nm_tprev = np->n_tprev; 1538 else 1539 np->n_tnext->n_tprev = np->n_tprev; 1540 if (np->n_tprev == (struct nfsnode *)nmp) 1541 nmp->nm_tnext = np->n_tnext; 1542 else 1543 np->n_tprev->n_tnext = np->n_tnext; 1544 } else 1545 np->n_flag &= ~NQNFSWRITE; 1546 if (cachable) 1547 np->n_flag &= ~NQNFSNONCACHE; 1548 else 1549 np->n_flag |= NQNFSNONCACHE; 1550 np->n_expiry = ltime; 1551 np->n_lrev = frev; 1552 tp = nmp->nm_tprev; 1553 while (tp != (struct nfsnode *)nmp && tp->n_expiry > np->n_expiry) 1554 tp = tp->n_tprev; 1555 if (tp == (struct nfsnode *)nmp) { 1556 np->n_tnext = nmp->nm_tnext; 1557 nmp->nm_tnext = np; 1558 } else { 1559 np->n_tnext = tp->n_tnext; 1560 tp->n_tnext = np; 1561 } 1562 np->n_tprev = tp; 1563 if (np->n_tnext == (struct nfsnode *)nmp) 1564 nmp->nm_tprev = np; 1565 else 1566 np->n_tnext->n_tprev = np; 1567 cache_enter(ndp->ni_dvp, ndp->ni_vp, cnp); 1568 } 1569 } else { 1570 nfsm_adv(nfsm_rndup(len)); 1571 } 1572 if (newvp != NULLVP) { 1573 vrele(newvp); 1574 newvp = NULLVP; 1575 } 1576 nfsm_dissect(tl, u_long *, 2*NFSX_UNSIGNED); 1577 if (bigenough) 1578 endoff = off = fxdr_unsigned(off_t, *tl++); 1579 else 1580 endoff = fxdr_unsigned(off_t, *tl++); 1581 more_dirs = fxdr_unsigned(int, *tl); 1582 } 1583 /* 1584 * If at end of rpc data, get the eof boolean 1585 */ 1586 if (!more_dirs) { 1587 nfsm_dissect(tl, u_long *, NFSX_UNSIGNED); 1588 more_dirs = (fxdr_unsigned(int, *tl) == 0); 1589 1590 /* 1591 * If at EOF, cache directory offset 1592 */ 1593 if (!more_dirs) 1594 VTONFS(vp)->n_direofoffset = endoff; 1595 } 1596 if (uiop->uio_resid < tresid) 1597 uiop->uio_offset = off; 1598 else 1599 more_dirs = 0; 1600 m_freem(mrep); 1601 } 1602 /* 1603 * Fill last record, iff any, out to a multiple of NFS_DIRBLKSIZ 1604 * by increasing d_reclen for the last record. 1605 */ 1606 if (uiop->uio_resid < tresid) { 1607 len = uiop->uio_resid & (NFS_DIRBLKSIZ - 1); 1608 if (len > 0) { 1609 dp->d_reclen += len; 1610 uiop->uio_iov->iov_base += len; 1611 uiop->uio_iov->iov_len -= len; 1612 uiop->uio_resid -= len; 1613 } 1614 } 1615 nfsmout: 1616 if (newvp != NULLVP) 1617 vrele(newvp); 1618 return (error); 1619 } 1620 static char hextoasc[] = "0123456789abcdef"; 1621 1622 /* 1623 * Silly rename. To make the NFS filesystem that is stateless look a little 1624 * more like the "ufs" a remove of an active vnode is translated to a rename 1625 * to a funny looking filename that is removed by nfs_inactive on the 1626 * nfsnode. There is the potential for another process on a different client 1627 * to create the same funny name between the nfs_lookitup() fails and the 1628 * nfs_rename() completes, but... 1629 */ 1630 int 1631 nfs_sillyrename(dvp, vp, cnp) 1632 struct vnode *dvp, *vp; 1633 struct componentname *cnp; 1634 { 1635 register struct nfsnode *np; 1636 register struct sillyrename *sp; 1637 int error; 1638 short pid; 1639 1640 cache_purge(dvp); 1641 np = VTONFS(vp); 1642 #ifdef SILLYSEPARATE 1643 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename), 1644 M_NFSREQ, M_WAITOK); 1645 #else 1646 sp = &np->n_silly; 1647 #endif 1648 sp->s_cred = crdup(cnp->cn_cred); 1649 sp->s_dvp = dvp; 1650 VREF(dvp); 1651 1652 /* Fudge together a funny name */ 1653 pid = cnp->cn_proc->p_pid; 1654 bcopy(".nfsAxxxx4.4", sp->s_name, 13); 1655 sp->s_namlen = 12; 1656 sp->s_name[8] = hextoasc[pid & 0xf]; 1657 sp->s_name[7] = hextoasc[(pid >> 4) & 0xf]; 1658 sp->s_name[6] = hextoasc[(pid >> 8) & 0xf]; 1659 sp->s_name[5] = hextoasc[(pid >> 12) & 0xf]; 1660 1661 /* Try lookitups until we get one that isn't there */ 1662 while (nfs_lookitup(sp, (nfsv2fh_t *)0, cnp->cn_proc) == 0) { 1663 sp->s_name[4]++; 1664 if (sp->s_name[4] > 'z') { 1665 error = EINVAL; 1666 goto bad; 1667 } 1668 } 1669 if (error = nfs_renameit(dvp, cnp, sp)) 1670 goto bad; 1671 nfs_lookitup(sp, &np->n_fh, cnp->cn_proc); 1672 np->n_sillyrename = sp; 1673 return (0); 1674 bad: 1675 vrele(sp->s_dvp); 1676 crfree(sp->s_cred); 1677 #ifdef SILLYSEPARATE 1678 free((caddr_t)sp, M_NFSREQ); 1679 #endif 1680 return (error); 1681 } 1682 1683 /* 1684 * Look up a file name for silly rename stuff. 1685 * Just like nfs_lookup() except that it doesn't load returned values 1686 * into the nfsnode table. 1687 * If fhp != NULL it copies the returned file handle out 1688 */ 1689 int 1690 nfs_lookitup(sp, fhp, procp) 1691 register struct sillyrename *sp; 1692 nfsv2fh_t *fhp; 1693 struct proc *procp; 1694 { 1695 register struct vnode *vp = sp->s_dvp; 1696 register u_long *tl; 1697 register caddr_t cp; 1698 register long t1, t2; 1699 caddr_t bpos, dpos, cp2; 1700 u_long xid; 1701 int error = 0; 1702 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1703 long len; 1704 1705 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 1706 len = sp->s_namlen; 1707 nfsm_reqhead(vp, NFSPROC_LOOKUP, NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len)); 1708 nfsm_fhtom(vp); 1709 nfsm_strtom(sp->s_name, len, NFS_MAXNAMLEN); 1710 nfsm_request(vp, NFSPROC_LOOKUP, procp, sp->s_cred); 1711 if (fhp != NULL) { 1712 nfsm_dissect(cp, caddr_t, NFSX_FH); 1713 bcopy(cp, (caddr_t)fhp, NFSX_FH); 1714 } 1715 nfsm_reqdone; 1716 return (error); 1717 } 1718 1719 /* 1720 * Kludge City.. 1721 * - make nfs_bmap() essentially a no-op that does no translation 1722 * - do nfs_strategy() by faking physical I/O with nfs_readrpc/nfs_writerpc 1723 * after mapping the physical addresses into Kernel Virtual space in the 1724 * nfsiobuf area. 1725 * (Maybe I could use the process's page mapping, but I was concerned that 1726 * Kernel Write might not be enabled and also figured copyout() would do 1727 * a lot more work than bcopy() and also it currently happens in the 1728 * context of the swapper process (2). 1729 */ 1730 int 1731 nfs_bmap(vp, bn, vpp, bnp) 1732 struct vnode *vp; 1733 daddr_t bn; 1734 struct vnode **vpp; 1735 daddr_t *bnp; 1736 { 1737 if (vpp != NULL) 1738 *vpp = vp; 1739 if (bnp != NULL) 1740 *bnp = bn * btodb(vp->v_mount->mnt_stat.f_iosize); 1741 return (0); 1742 } 1743 1744 /* 1745 * Strategy routine for phys. i/o 1746 * If the biod's are running, queue a request 1747 * otherwise just call nfs_doio() to get it done 1748 */ 1749 int 1750 nfs_strategy(bp) 1751 register struct buf *bp; 1752 { 1753 register struct buf *dp; 1754 register int i; 1755 int error = 0; 1756 int fnd = 0; 1757 1758 /* 1759 * Set b_proc. It seems a bit silly to do it here, but since bread() 1760 * doesn't set it, I will. 1761 * Set b_proc == NULL for asynchronous ops, since these may still 1762 * be hanging about after the process terminates. 1763 */ 1764 if ((bp->b_flags & B_PHYS) == 0) { 1765 if (bp->b_flags & B_ASYNC) 1766 bp->b_proc = (struct proc *)0; 1767 else 1768 bp->b_proc = curproc; 1769 } 1770 /* 1771 * If the op is asynchronous and an i/o daemon is waiting 1772 * queue the request, wake it up and wait for completion 1773 * otherwise just do it ourselves. 1774 */ 1775 if ((bp->b_flags & B_ASYNC) == 0 || nfs_numasync == 0) 1776 return (nfs_doio(bp)); 1777 for (i = 0; i < NFS_MAXASYNCDAEMON; i++) { 1778 if (nfs_iodwant[i]) { 1779 dp = &nfs_bqueue; 1780 if (dp->b_actf == NULL) { 1781 dp->b_actl = bp; 1782 bp->b_actf = dp; 1783 } else { 1784 dp->b_actf->b_actl = bp; 1785 bp->b_actf = dp->b_actf; 1786 } 1787 dp->b_actf = bp; 1788 bp->b_actl = dp; 1789 fnd++; 1790 wakeup((caddr_t)&nfs_iodwant[i]); 1791 break; 1792 } 1793 } 1794 if (!fnd) 1795 error = nfs_doio(bp); 1796 return (error); 1797 } 1798 1799 /* 1800 * Fun and games with i/o 1801 * Essentially play ubasetup() and disk interrupt service routine by 1802 * mapping the data buffer into kernel virtual space and doing the 1803 * nfs read or write rpc's from it. 1804 * If the nfsiod's are not running, this is just called from nfs_strategy(), 1805 * otherwise it is called by the nfsiods to do what would normally be 1806 * partially disk interrupt driven. 1807 */ 1808 int 1809 nfs_doio(bp) 1810 register struct buf *bp; 1811 { 1812 register struct uio *uiop; 1813 register struct vnode *vp; 1814 struct nfsnode *np; 1815 struct ucred *cr; 1816 int error; 1817 struct uio uio; 1818 struct iovec io; 1819 1820 vp = bp->b_vp; 1821 np = VTONFS(vp); 1822 uiop = &uio; 1823 uiop->uio_iov = &io; 1824 uiop->uio_iovcnt = 1; 1825 uiop->uio_segflg = UIO_SYSSPACE; 1826 uiop->uio_procp = bp->b_proc; 1827 1828 /* 1829 * For phys i/o, map the b_addr into kernel virtual space using 1830 * the Nfsiomap pte's 1831 * Also, add a temporary b_rcred for reading using the process's uid 1832 * and a guess at a group 1833 */ 1834 if (bp->b_flags & B_PHYS) { 1835 if (bp->b_flags & B_DIRTY) 1836 uiop->uio_procp = pageproc; 1837 cr = crcopy(uiop->uio_procp->p_ucred); 1838 /* mapping was already done by vmapbuf */ 1839 io.iov_base = bp->b_un.b_addr; 1840 1841 /* 1842 * And do the i/o rpc 1843 */ 1844 io.iov_len = uiop->uio_resid = bp->b_bcount; 1845 uiop->uio_offset = bp->b_blkno * DEV_BSIZE; 1846 if (bp->b_flags & B_READ) { 1847 uiop->uio_rw = UIO_READ; 1848 nfsstats.read_physios++; 1849 bp->b_error = error = nfs_readrpc(vp, uiop, cr); 1850 (void) vnode_pager_uncache(vp); 1851 } else { 1852 uiop->uio_rw = UIO_WRITE; 1853 nfsstats.write_physios++; 1854 bp->b_error = error = nfs_writerpc(vp, uiop, cr); 1855 } 1856 1857 /* 1858 * Finally, release pte's used by physical i/o 1859 */ 1860 crfree(cr); 1861 } else { 1862 if (bp->b_flags & B_READ) { 1863 io.iov_len = uiop->uio_resid = bp->b_bcount; 1864 io.iov_base = bp->b_un.b_addr; 1865 uiop->uio_rw = UIO_READ; 1866 switch (vp->v_type) { 1867 case VREG: 1868 uiop->uio_offset = bp->b_blkno * DEV_BSIZE; 1869 nfsstats.read_bios++; 1870 error = nfs_readrpc(vp, uiop, bp->b_rcred); 1871 break; 1872 case VLNK: 1873 uiop->uio_offset = 0; 1874 nfsstats.readlink_bios++; 1875 error = nfs_readlinkrpc(vp, uiop, bp->b_rcred); 1876 break; 1877 case VDIR: 1878 uiop->uio_offset = bp->b_lblkno; 1879 nfsstats.readdir_bios++; 1880 if (VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_RDIRALOOK) 1881 error = nfs_readdirlookrpc(vp, uiop, bp->b_rcred); 1882 else 1883 error = nfs_readdirrpc(vp, uiop, bp->b_rcred); 1884 /* 1885 * Save offset cookie in b_blkno. 1886 */ 1887 bp->b_blkno = uiop->uio_offset; 1888 break; 1889 }; 1890 bp->b_error = error; 1891 } else { 1892 io.iov_len = uiop->uio_resid = bp->b_dirtyend 1893 - bp->b_dirtyoff; 1894 uiop->uio_offset = (bp->b_blkno * DEV_BSIZE) 1895 + bp->b_dirtyoff; 1896 io.iov_base = bp->b_un.b_addr + bp->b_dirtyoff; 1897 uiop->uio_rw = UIO_WRITE; 1898 nfsstats.write_bios++; 1899 bp->b_error = error = nfs_writerpc(vp, uiop, 1900 bp->b_wcred); 1901 if (error) { 1902 np->n_error = error; 1903 np->n_flag |= NWRITEERR; 1904 } 1905 bp->b_dirtyoff = bp->b_dirtyend = 0; 1906 } 1907 } 1908 if (error) 1909 bp->b_flags |= B_ERROR; 1910 bp->b_resid = uiop->uio_resid; 1911 biodone(bp); 1912 return (error); 1913 } 1914 1915 /* 1916 * Mmap a file 1917 * 1918 * NB Currently unsupported. 1919 */ 1920 /* ARGSUSED */ 1921 int 1922 nfs_mmap(vp, fflags, cred, p) 1923 struct vnode *vp; 1924 int fflags; 1925 struct ucred *cred; 1926 struct proc *p; 1927 { 1928 1929 return (EINVAL); 1930 } 1931 1932 /* 1933 * Flush all the blocks associated with a vnode. 1934 * Walk through the buffer pool and push any dirty pages 1935 * associated with the vnode. 1936 */ 1937 /* ARGSUSED */ 1938 int 1939 nfs_fsync(vp, fflags, cred, waitfor, p) 1940 register struct vnode *vp; 1941 int fflags; 1942 struct ucred *cred; 1943 int waitfor; 1944 struct proc *p; 1945 { 1946 register struct nfsnode *np = VTONFS(vp); 1947 int error = 0; 1948 1949 if (np->n_flag & NMODIFIED) { 1950 np->n_flag &= ~NMODIFIED; 1951 vflushbuf(vp, waitfor == MNT_WAIT ? B_SYNC : 0); 1952 } 1953 if (!error && (np->n_flag & NWRITEERR)) 1954 error = np->n_error; 1955 return (error); 1956 } 1957 1958 /* 1959 * NFS advisory byte-level locks. 1960 * Currently unsupported. 1961 */ 1962 int 1963 nfs_advlock(vp, id, op, fl, flags) 1964 struct vnode *vp; 1965 caddr_t id; 1966 int op; 1967 struct flock *fl; 1968 int flags; 1969 { 1970 1971 return (EOPNOTSUPP); 1972 } 1973 1974 /* 1975 * Print out the contents of an nfsnode. 1976 */ 1977 int 1978 nfs_print(vp) 1979 struct vnode *vp; 1980 { 1981 register struct nfsnode *np = VTONFS(vp); 1982 1983 printf("tag VT_NFS, fileid %d fsid 0x%x", 1984 np->n_vattr.va_fileid, np->n_vattr.va_fsid); 1985 #ifdef FIFO 1986 if (vp->v_type == VFIFO) 1987 fifo_printinfo(vp); 1988 #endif /* FIFO */ 1989 printf("\n"); 1990 } 1991 1992 /* 1993 * NFS directory offset lookup. 1994 * Currently unsupported. 1995 */ 1996 int 1997 nfs_blkatoff(vp, offset, res, bpp) 1998 struct vnode *vp; 1999 off_t offset; 2000 char **res; 2001 struct buf **bpp; 2002 { 2003 2004 return (EOPNOTSUPP); 2005 } 2006 2007 /* 2008 * NFS flat namespace lookup. 2009 * Currently unsupported. 2010 */ 2011 int 2012 nfs_vget(mp, ino, vpp) 2013 struct mount *mp; 2014 ino_t ino; 2015 struct vnode **vpp; 2016 { 2017 2018 return (EOPNOTSUPP); 2019 } 2020 2021 /* 2022 * NFS flat namespace allocation. 2023 * Currently unsupported. 2024 */ 2025 int 2026 nfs_valloc(pvp, mode, cred, vpp) 2027 struct vnode *pvp; 2028 int mode; 2029 struct ucred *cred; 2030 struct vnode **vpp; 2031 { 2032 2033 return (EOPNOTSUPP); 2034 } 2035 2036 /* 2037 * NFS flat namespace free. 2038 * Currently unsupported. 2039 */ 2040 void 2041 nfs_vfree(pvp, ino, mode) 2042 struct vnode *pvp; 2043 ino_t ino; 2044 int mode; 2045 { 2046 2047 return; 2048 } 2049 2050 /* 2051 * NFS file truncation. 2052 */ 2053 int 2054 nfs_truncate(vp, length, flags) 2055 struct vnode *vp; 2056 u_long length; 2057 int flags; 2058 { 2059 2060 /* Use nfs_setattr */ 2061 printf("nfs_truncate: need to implement!!"); 2062 return (EOPNOTSUPP); 2063 } 2064 2065 /* 2066 * NFS update. 2067 */ 2068 int 2069 nfs_update(vp, ta, tm, waitfor) 2070 struct vnode *vp; 2071 struct timeval *ta; 2072 struct timeval *tm; 2073 int waitfor; 2074 { 2075 2076 /* Use nfs_setattr */ 2077 printf("nfs_update: need to implement!!"); 2078 return (EOPNOTSUPP); 2079 } 2080