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 7.73 (Berkeley) 05/14/92 11 */ 12 13 /* 14 * vnode op calls for sun nfs version 2 15 */ 16 17 #include <sys/param.h> 18 #include <sys/proc.h> 19 #include <sys/kernel.h> 20 #include <sys/systm.h> 21 #include <sys/mount.h> 22 #include <sys/buf.h> 23 #include <sys/malloc.h> 24 #include <sys/mbuf.h> 25 #include <sys/conf.h> 26 #include <sys/namei.h> 27 #include <sys/vnode.h> 28 #include <sys/specdev.h> 29 #include <sys/fifo.h> 30 #include <sys/map.h> 31 32 #include <vm/vm.h> 33 34 #include <nfs/rpcv2.h> 35 #include <nfs/nfsv2.h> 36 #include <nfs/nfs.h> 37 #include <nfs/nfsnode.h> 38 #include <nfs/nfsmount.h> 39 #include <nfs/xdr_subs.h> 40 #include <nfs/nfsm_subs.h> 41 #include <nfs/nqnfs.h> 42 43 /* Defs */ 44 #define TRUE 1 45 #define FALSE 0 46 47 /* 48 * Global vfs data structures for nfs 49 */ 50 struct vnodeops nfsv2_vnodeops = { 51 nfs_lookup, /* lookup */ 52 nfs_create, /* create */ 53 nfs_mknod, /* mknod */ 54 nfs_open, /* open */ 55 nfs_close, /* close */ 56 nfs_access, /* access */ 57 nfs_getattr, /* getattr */ 58 nfs_setattr, /* setattr */ 59 nfs_read, /* read */ 60 nfs_write, /* write */ 61 nfs_ioctl, /* ioctl */ 62 nfs_select, /* select */ 63 nfs_mmap, /* mmap */ 64 nfs_fsync, /* fsync */ 65 nfs_seek, /* seek */ 66 nfs_remove, /* remove */ 67 nfs_link, /* link */ 68 nfs_rename, /* rename */ 69 nfs_mkdir, /* mkdir */ 70 nfs_rmdir, /* rmdir */ 71 nfs_symlink, /* symlink */ 72 nfs_readdir, /* readdir */ 73 nfs_readlink, /* readlink */ 74 nfs_abortop, /* abortop */ 75 nfs_inactive, /* inactive */ 76 nfs_reclaim, /* reclaim */ 77 nfs_lock, /* lock */ 78 nfs_unlock, /* unlock */ 79 nfs_bmap, /* bmap */ 80 nfs_strategy, /* strategy */ 81 nfs_print, /* print */ 82 nfs_islocked, /* islocked */ 83 nfs_advlock, /* advlock */ 84 nfs_blkatoff, /* blkatoff */ 85 nfs_vget, /* vget */ 86 nfs_valloc, /* valloc */ 87 nfs_vfree, /* vfree */ 88 nfs_truncate, /* truncate */ 89 nfs_update, /* update */ 90 bwrite, /* bwrite */ 91 }; 92 93 /* 94 * Special device vnode ops 95 */ 96 struct vnodeops spec_nfsv2nodeops = { 97 spec_lookup, /* lookup */ 98 spec_create, /* create */ 99 spec_mknod, /* mknod */ 100 spec_open, /* open */ 101 spec_close, /* close */ 102 nfs_access, /* access */ 103 nfs_getattr, /* getattr */ 104 nfs_setattr, /* setattr */ 105 spec_read, /* read */ 106 spec_write, /* write */ 107 spec_ioctl, /* ioctl */ 108 spec_select, /* select */ 109 spec_mmap, /* mmap */ 110 spec_fsync, /* fsync */ 111 spec_seek, /* seek */ 112 spec_remove, /* remove */ 113 spec_link, /* link */ 114 spec_rename, /* rename */ 115 spec_mkdir, /* mkdir */ 116 spec_rmdir, /* rmdir */ 117 spec_symlink, /* symlink */ 118 spec_readdir, /* readdir */ 119 spec_readlink, /* readlink */ 120 spec_abortop, /* abortop */ 121 nfs_inactive, /* inactive */ 122 nfs_reclaim, /* reclaim */ 123 nfs_lock, /* lock */ 124 nfs_unlock, /* unlock */ 125 spec_bmap, /* bmap */ 126 spec_strategy, /* strategy */ 127 nfs_print, /* print */ 128 nfs_islocked, /* islocked */ 129 spec_advlock, /* advlock */ 130 spec_blkatoff, /* blkatoff */ 131 spec_vget, /* vget */ 132 spec_valloc, /* valloc */ 133 spec_vfree, /* vfree */ 134 spec_truncate, /* truncate */ 135 nfs_update, /* update */ 136 bwrite, /* bwrite */ 137 }; 138 139 #ifdef FIFO 140 struct vnodeops fifo_nfsv2nodeops = { 141 fifo_lookup, /* lookup */ 142 fifo_create, /* create */ 143 fifo_mknod, /* mknod */ 144 fifo_open, /* open */ 145 fifo_close, /* close */ 146 nfs_access, /* access */ 147 nfs_getattr, /* getattr */ 148 nfs_setattr, /* setattr */ 149 fifo_read, /* read */ 150 fifo_write, /* write */ 151 fifo_ioctl, /* ioctl */ 152 fifo_select, /* select */ 153 fifo_mmap, /* mmap */ 154 fifo_fsync, /* fsync */ 155 fifo_seek, /* seek */ 156 fifo_remove, /* remove */ 157 fifo_link, /* link */ 158 fifo_rename, /* rename */ 159 fifo_mkdir, /* mkdir */ 160 fifo_rmdir, /* rmdir */ 161 fifo_symlink, /* symlink */ 162 fifo_readdir, /* readdir */ 163 fifo_readlink, /* readlink */ 164 fifo_abortop, /* abortop */ 165 nfs_inactive, /* inactive */ 166 nfs_reclaim, /* reclaim */ 167 nfs_lock, /* lock */ 168 nfs_unlock, /* unlock */ 169 fifo_bmap, /* bmap */ 170 fifo_badop, /* strategy */ 171 nfs_print, /* print */ 172 nfs_islocked, /* islocked */ 173 fifo_advlock, /* advlock */ 174 fifo_blkatoff, /* blkatoff */ 175 fifo_vget, /* vget */ 176 fifo_valloc, /* valloc */ 177 fifo_vfree, /* vfree */ 178 fifo_truncate, /* truncate */ 179 nfs_update, /* update */ 180 bwrite, /* bwrite */ 181 }; 182 #endif /* FIFO */ 183 184 /* 185 * Global variables 186 */ 187 extern u_long nfs_procids[NFS_NPROCS]; 188 extern u_long nfs_prog, nfs_vers; 189 extern char nfsiobuf[MAXPHYS+NBPG]; 190 struct buf nfs_bqueue; /* Queue head for nfsiod's */ 191 struct proc *nfs_iodwant[NFS_MAXASYNCDAEMON]; 192 int nfs_numasync = 0; 193 #define DIRHDSIZ (sizeof (struct readdir) - (MAXNAMLEN + 1)) 194 195 /* 196 * nfs null call from vfs. 197 */ 198 int 199 nfs_null(vp, cred, procp) 200 struct vnode *vp; 201 struct ucred *cred; 202 struct proc *procp; 203 { 204 caddr_t bpos, dpos; 205 int error = 0; 206 struct mbuf *mreq, *mrep, *md, *mb; 207 208 nfsm_reqhead(vp, NFSPROC_NULL, 0); 209 nfsm_request(vp, NFSPROC_NULL, procp, cred); 210 nfsm_reqdone; 211 return (error); 212 } 213 214 /* 215 * nfs access vnode op. 216 * Essentially just get vattr and then imitate iaccess() 217 */ 218 int 219 nfs_access(vp, mode, cred, procp) 220 struct vnode *vp; 221 int mode; 222 register struct ucred *cred; 223 struct proc *procp; 224 { 225 register struct vattr *vap; 226 register gid_t *gp; 227 struct vattr vattr; 228 register int i; 229 int error; 230 231 /* 232 * If you're the super-user, 233 * you always get access. 234 */ 235 if (cred->cr_uid == 0) 236 return (0); 237 vap = &vattr; 238 if (error = nfs_getattr(vp, vap, cred, procp)) 239 return (error); 240 /* 241 * Access check is based on only one of owner, group, public. 242 * If not owner, then check group. If not a member of the 243 * group, then check public access. 244 */ 245 if (cred->cr_uid != vap->va_uid) { 246 mode >>= 3; 247 gp = cred->cr_groups; 248 for (i = 0; i < cred->cr_ngroups; i++, gp++) 249 if (vap->va_gid == *gp) 250 goto found; 251 mode >>= 3; 252 found: 253 ; 254 } 255 if ((vap->va_mode & mode) != 0) 256 return (0); 257 return (EACCES); 258 } 259 260 /* 261 * nfs open vnode op 262 * Just check to see if the type is ok 263 * and that deletion is not in progress. 264 */ 265 /* ARGSUSED */ 266 int 267 nfs_open(vp, mode, cred, procp) 268 register struct vnode *vp; 269 int mode; 270 struct ucred *cred; 271 struct proc *procp; 272 { 273 274 if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK) 275 return (EACCES); 276 if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS) == 0) 277 VTONFS(vp)->n_attrstamp = 0; /* For Open/Close consistency */ 278 return (0); 279 } 280 281 /* 282 * nfs close vnode op 283 * For reg files, invalidate any buffer cache entries. 284 */ 285 /* ARGSUSED */ 286 int 287 nfs_close(vp, fflags, cred, procp) 288 register struct vnode *vp; 289 int fflags; 290 struct ucred *cred; 291 struct proc *procp; 292 { 293 register struct nfsnode *np = VTONFS(vp); 294 int error = 0; 295 296 if ((np->n_flag & NMODIFIED) && 297 (VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS) == 0 && 298 vp->v_type == VREG) { 299 np->n_flag &= ~NMODIFIED; 300 vinvalbuf(vp, TRUE); 301 np->n_attrstamp = 0; 302 if (np->n_flag & NWRITEERR) { 303 np->n_flag &= ~NWRITEERR; 304 error = np->n_error; 305 } 306 } 307 return (error); 308 } 309 310 /* 311 * nfs getattr call from vfs. 312 */ 313 int 314 nfs_getattr(vp, vap, cred, procp) 315 register struct vnode *vp; 316 struct vattr *vap; 317 struct ucred *cred; 318 struct proc *procp; 319 { 320 register caddr_t cp; 321 caddr_t bpos, dpos; 322 int error = 0; 323 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 324 325 /* First look in the cache.. */ 326 if (nfs_getattrcache(vp, vap) == 0) 327 return (0); 328 nfsstats.rpccnt[NFSPROC_GETATTR]++; 329 nfsm_reqhead(vp, NFSPROC_GETATTR, NFSX_FH); 330 nfsm_fhtom(vp); 331 nfsm_request(vp, NFSPROC_GETATTR, procp, cred); 332 nfsm_loadattr(vp, vap); 333 nfsm_reqdone; 334 return (error); 335 } 336 337 /* 338 * nfs setattr call. 339 */ 340 int 341 nfs_setattr(vp, vap, cred, procp) 342 register struct vnode *vp; 343 register struct vattr *vap; 344 struct ucred *cred; 345 struct proc *procp; 346 { 347 register struct nfsv2_sattr *sp; 348 register caddr_t cp; 349 register long t1; 350 caddr_t bpos, dpos, cp2; 351 u_long *tl; 352 int error = 0; 353 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 354 struct nfsnode *np = VTONFS(vp); 355 u_quad_t frev; 356 357 nfsstats.rpccnt[NFSPROC_SETATTR]++; 358 nfsm_reqhead(vp, NFSPROC_SETATTR, NFSX_FH+NFSX_SATTR); 359 nfsm_fhtom(vp); 360 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 361 if (vap->va_mode == 0xffff) 362 sp->sa_mode = VNOVAL; 363 else 364 sp->sa_mode = vtonfs_mode(vp->v_type, vap->va_mode); 365 if (vap->va_uid == 0xffff) 366 sp->sa_uid = VNOVAL; 367 else 368 sp->sa_uid = txdr_unsigned(vap->va_uid); 369 if (vap->va_gid == 0xffff) 370 sp->sa_gid = VNOVAL; 371 else 372 sp->sa_gid = txdr_unsigned(vap->va_gid); 373 sp->sa_size = txdr_unsigned(vap->va_size); 374 sp->sa_atime.tv_sec = txdr_unsigned(vap->va_atime.tv_sec); 375 sp->sa_atime.tv_usec = txdr_unsigned(vap->va_flags); 376 txdr_time(&vap->va_mtime, &sp->sa_mtime); 377 if (vap->va_size != VNOVAL || vap->va_mtime.tv_sec != VNOVAL || 378 vap->va_atime.tv_sec != VNOVAL) { 379 if (np->n_flag & NMODIFIED) { 380 np->n_flag &= ~NMODIFIED; 381 if (vap->va_size == 0) 382 vinvalbuf(vp, FALSE); 383 else 384 vinvalbuf(vp, TRUE); 385 } 386 } 387 nfsm_request(vp, NFSPROC_SETATTR, procp, cred); 388 nfsm_loadattr(vp, (struct vattr *)0); 389 if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS) && 390 NQNFS_CKCACHABLE(vp, NQL_WRITE)) { 391 nfsm_dissect(tl, u_long *, 2*NFSX_UNSIGNED); 392 fxdr_hyper(tl, &frev); 393 if (QUADGT(frev, np->n_brev)) 394 np->n_brev = frev; 395 } 396 nfsm_reqdone; 397 return (error); 398 } 399 400 /* 401 * nfs lookup call, one step at a time... 402 * First look in cache 403 * If not found, unlock the directory nfsnode and do the rpc 404 */ 405 int 406 nfs_lookup(dvp, vpp, cnp) 407 struct vnode *dvp; 408 struct vnode **vpp; 409 struct componentname *cnp; 410 { 411 register struct vnode *vdp; 412 register u_long *tl; 413 register caddr_t cp; 414 register long t1, t2; 415 struct nfsmount *nmp; 416 struct nfsnode *tp; 417 caddr_t bpos, dpos, cp2; 418 time_t reqtime; 419 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 420 struct vnode *newvp; 421 long len; 422 nfsv2fh_t *fhp; 423 struct nfsnode *np; 424 int lockparent, wantparent, error = 0; 425 int nqlflag, cachable; 426 u_quad_t frev; 427 428 *vpp = NULL; 429 if (dvp->v_type != VDIR) 430 return (ENOTDIR); 431 lockparent = cnp->cn_flags & LOCKPARENT; 432 wantparent = cnp->cn_flags & (LOCKPARENT|WANTPARENT); 433 nmp = VFSTONFS(dvp->v_mount); 434 np = VTONFS(dvp); 435 if ((error = cache_lookup(dvp, vpp, cnp)) && error != ENOENT) { 436 struct vattr vattr; 437 int vpid; 438 439 vdp = *vpp; 440 vpid = vdp->v_id; 441 /* 442 * See the comment starting `Step through' in ufs/ufs_lookup.c 443 * for an explanation of the locking protocol 444 */ 445 if (dvp == vdp) { 446 VREF(vdp); 447 error = 0; 448 } else 449 error = vget(vdp); 450 if (!error) { 451 if (vpid == vdp->v_id) { 452 if (nmp->nm_flag & NFSMNT_NQNFS) { 453 if (NQNFS_CKCACHABLE(dvp, NQL_READ)) { 454 if (QUADNE(np->n_lrev, np->n_brev) || 455 (np->n_flag & NMODIFIED)) { 456 np->n_direofoffset = 0; 457 cache_purge(dvp); 458 np->n_flag &= ~NMODIFIED; 459 vinvalbuf(dvp, FALSE); 460 np->n_brev = np->n_lrev; 461 } else { 462 nfsstats.lookupcache_hits++; 463 if (cnp->cn_nameiop != LOOKUP && 464 (cnp->cn_flags&ISLASTCN)) 465 cnp->cn_flags |= SAVENAME; 466 return (0); 467 } 468 } 469 } else if (!nfs_getattr(vdp, &vattr, cnp->cn_cred, cnp->cn_proc) && 470 vattr.va_ctime.tv_sec == VTONFS(vdp)->n_ctime) { 471 nfsstats.lookupcache_hits++; 472 if (cnp->cn_nameiop != LOOKUP && (cnp->cn_flags&ISLASTCN)) 473 cnp->cn_flags |= SAVENAME; 474 return (0); 475 } 476 cache_purge(vdp); 477 } 478 vrele(vdp); 479 } 480 *vpp = NULLVP; 481 } 482 error = 0; 483 nfsstats.lookupcache_misses++; 484 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 485 len = cnp->cn_namelen; 486 nfsm_reqhead(dvp, NFSPROC_LOOKUP, NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len)); 487 488 /* 489 * For nqnfs optionally piggyback a getlease request for the name 490 * being looked up. 491 */ 492 if (nmp->nm_flag & NFSMNT_NQNFS) { 493 if ((nmp->nm_flag & NFSMNT_NQLOOKLEASE) && 494 ((cnp->cn_flags&MAKEENTRY) && (cnp->cn_nameiop != DELETE || !(cnp->cn_flags&ISLASTCN)))) { 495 nfsm_build(tl, u_long *, 2*NFSX_UNSIGNED); 496 *tl++ = txdr_unsigned(NQL_READ); 497 *tl = txdr_unsigned(nmp->nm_leaseterm); 498 } else { 499 nfsm_build(tl, u_long *, NFSX_UNSIGNED); 500 *tl = 0; 501 } 502 } 503 nfsm_fhtom(dvp); 504 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 505 reqtime = time.tv_sec; 506 nfsm_request(dvp, NFSPROC_LOOKUP, cnp->cn_proc, cnp->cn_cred); 507 nfsmout: 508 if (error) { 509 if ((cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME) && 510 (cnp->cn_flags & ISLASTCN) && error == ENOENT) 511 error = EJUSTRETURN; 512 if (cnp->cn_nameiop != LOOKUP && (cnp->cn_flags&ISLASTCN)) 513 cnp->cn_flags |= SAVENAME; 514 return (error); 515 } 516 if (nmp->nm_flag & NFSMNT_NQNFS) { 517 nfsm_dissect(tl, u_long *, NFSX_UNSIGNED); 518 if (*tl) { 519 nqlflag = fxdr_unsigned(int, *tl); 520 nfsm_dissect(tl, u_long *, 4*NFSX_UNSIGNED); 521 cachable = fxdr_unsigned(int, *tl++); 522 reqtime += fxdr_unsigned(int, *tl++); 523 fxdr_hyper(tl, &frev); 524 } else 525 nqlflag = 0; 526 } 527 nfsm_dissect(fhp, nfsv2fh_t *, NFSX_FH); 528 529 /* 530 * Handle RENAME case... 531 */ 532 if (cnp->cn_nameiop == RENAME && wantparent && (cnp->cn_flags&ISLASTCN)) { 533 if (!bcmp(np->n_fh.fh_bytes, (caddr_t)fhp, NFSX_FH)) { 534 m_freem(mrep); 535 return (EISDIR); 536 } 537 if (error = nfs_nget(dvp->v_mount, fhp, &np)) { 538 m_freem(mrep); 539 return (error); 540 } 541 newvp = NFSTOV(np); 542 if (error = 543 nfs_loadattrcache(&newvp, &md, &dpos, (struct vattr *)0)) { 544 vrele(newvp); 545 m_freem(mrep); 546 return (error); 547 } 548 *vpp = newvp; 549 m_freem(mrep); 550 cnp->cn_flags |= SAVENAME; 551 return (0); 552 } 553 554 if (!bcmp(np->n_fh.fh_bytes, (caddr_t)fhp, NFSX_FH)) { 555 VREF(dvp); 556 newvp = dvp; 557 } else { 558 if (error = nfs_nget(dvp->v_mount, fhp, &np)) { 559 m_freem(mrep); 560 return (error); 561 } 562 newvp = NFSTOV(np); 563 } 564 if (error = nfs_loadattrcache(&newvp, &md, &dpos, (struct vattr *)0)) { 565 vrele(newvp); 566 m_freem(mrep); 567 return (error); 568 } 569 m_freem(mrep); 570 *vpp = newvp; 571 if (cnp->cn_nameiop != LOOKUP && (cnp->cn_flags&ISLASTCN)) 572 cnp->cn_flags |= SAVENAME; 573 if ((cnp->cn_flags&MAKEENTRY) && (cnp->cn_nameiop != DELETE || !(cnp->cn_flags&ISLASTCN))) { 574 if ((nmp->nm_flag & NFSMNT_NQNFS) == 0) 575 np->n_ctime = np->n_vattr.va_ctime.tv_sec; 576 else if (nqlflag && reqtime > time.tv_sec) { 577 if (np->n_tnext) { 578 if (np->n_tnext == (struct nfsnode *)nmp) 579 nmp->nm_tprev = np->n_tprev; 580 else 581 np->n_tnext->n_tprev = np->n_tprev; 582 if (np->n_tprev == (struct nfsnode *)nmp) 583 nmp->nm_tnext = np->n_tnext; 584 else 585 np->n_tprev->n_tnext = np->n_tnext; 586 if (nqlflag == NQL_WRITE) 587 np->n_flag |= NQNFSWRITE; 588 } else if (nqlflag == NQL_READ) 589 np->n_flag &= ~NQNFSWRITE; 590 else 591 np->n_flag |= NQNFSWRITE; 592 if (cachable) 593 np->n_flag &= ~NQNFSNONCACHE; 594 else 595 np->n_flag |= NQNFSNONCACHE; 596 np->n_expiry = reqtime; 597 np->n_lrev = frev; 598 tp = nmp->nm_tprev; 599 while (tp != (struct nfsnode *)nmp && tp->n_expiry > np->n_expiry) 600 tp = tp->n_tprev; 601 if (tp == (struct nfsnode *)nmp) { 602 np->n_tnext = nmp->nm_tnext; 603 nmp->nm_tnext = np; 604 } else { 605 np->n_tnext = tp->n_tnext; 606 tp->n_tnext = np; 607 } 608 np->n_tprev = tp; 609 if (np->n_tnext == (struct nfsnode *)nmp) 610 nmp->nm_tprev = np; 611 else 612 np->n_tnext->n_tprev = np; 613 } 614 cache_enter(dvp, *vpp, cnp); 615 } 616 return (0); 617 } 618 619 /* 620 * nfs read call. 621 * Just call nfs_bioread() to do the work. 622 */ 623 int 624 nfs_read(vp, uiop, ioflag, cred) 625 register struct vnode *vp; 626 struct uio *uiop; 627 int ioflag; 628 struct ucred *cred; 629 { 630 if (vp->v_type != VREG) 631 return (EPERM); 632 return (nfs_bioread(vp, uiop, ioflag, cred)); 633 } 634 635 /* 636 * nfs readlink call 637 */ 638 int 639 nfs_readlink(vp, uiop, cred) 640 struct vnode *vp; 641 struct uio *uiop; 642 struct ucred *cred; 643 { 644 if (vp->v_type != VLNK) 645 return (EPERM); 646 return (nfs_bioread(vp, uiop, 0, cred)); 647 } 648 649 /* 650 * Do a readlink rpc. 651 * Called by nfs_doio() from below the buffer cache. 652 */ 653 int 654 nfs_readlinkrpc(vp, uiop, cred) 655 register struct vnode *vp; 656 struct uio *uiop; 657 struct ucred *cred; 658 { 659 register u_long *tl; 660 register caddr_t cp; 661 register long t1; 662 caddr_t bpos, dpos, cp2; 663 int error = 0; 664 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 665 long len; 666 667 nfsstats.rpccnt[NFSPROC_READLINK]++; 668 nfsm_reqhead(vp, NFSPROC_READLINK, NFSX_FH); 669 nfsm_fhtom(vp); 670 nfsm_request(vp, NFSPROC_READLINK, uiop->uio_procp, cred); 671 nfsm_strsiz(len, NFS_MAXPATHLEN); 672 nfsm_mtouio(uiop, len); 673 nfsm_reqdone; 674 return (error); 675 } 676 677 /* 678 * nfs read rpc call 679 * Ditto above 680 */ 681 int 682 nfs_readrpc(vp, uiop, cred) 683 register struct vnode *vp; 684 struct uio *uiop; 685 struct ucred *cred; 686 { 687 register u_long *tl; 688 register caddr_t cp; 689 register long t1; 690 caddr_t bpos, dpos, cp2; 691 int error = 0; 692 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 693 struct nfsmount *nmp; 694 long len, retlen, tsiz; 695 696 nmp = VFSTONFS(vp->v_mount); 697 tsiz = uiop->uio_resid; 698 while (tsiz > 0) { 699 nfsstats.rpccnt[NFSPROC_READ]++; 700 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz; 701 nfsm_reqhead(vp, NFSPROC_READ, NFSX_FH+NFSX_UNSIGNED*3); 702 nfsm_fhtom(vp); 703 nfsm_build(tl, u_long *, NFSX_UNSIGNED*3); 704 *tl++ = txdr_unsigned(uiop->uio_offset); 705 *tl++ = txdr_unsigned(len); 706 *tl = 0; 707 nfsm_request(vp, NFSPROC_READ, uiop->uio_procp, cred); 708 nfsm_loadattr(vp, (struct vattr *)0); 709 nfsm_strsiz(retlen, nmp->nm_rsize); 710 nfsm_mtouio(uiop, retlen); 711 m_freem(mrep); 712 if (retlen < len) 713 tsiz = 0; 714 else 715 tsiz -= len; 716 } 717 nfsmout: 718 return (error); 719 } 720 721 /* 722 * nfs write call 723 */ 724 int 725 nfs_writerpc(vp, uiop, cred) 726 register struct vnode *vp; 727 struct uio *uiop; 728 struct ucred *cred; 729 { 730 register u_long *tl; 731 register caddr_t cp; 732 register long t1; 733 caddr_t bpos, dpos, cp2; 734 int error = 0; 735 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 736 struct nfsmount *nmp; 737 struct nfsnode *np = VTONFS(vp); 738 u_quad_t frev; 739 long len, tsiz; 740 741 nmp = VFSTONFS(vp->v_mount); 742 tsiz = uiop->uio_resid; 743 while (tsiz > 0) { 744 nfsstats.rpccnt[NFSPROC_WRITE]++; 745 len = (tsiz > nmp->nm_wsize) ? nmp->nm_wsize : tsiz; 746 nfsm_reqhead(vp, NFSPROC_WRITE, 747 NFSX_FH+NFSX_UNSIGNED*4+nfsm_rndup(len)); 748 nfsm_fhtom(vp); 749 nfsm_build(tl, u_long *, NFSX_UNSIGNED*4); 750 *(tl+1) = txdr_unsigned(uiop->uio_offset); 751 *(tl+3) = txdr_unsigned(len); 752 nfsm_uiotom(uiop, len); 753 nfsm_request(vp, NFSPROC_WRITE, uiop->uio_procp, cred); 754 nfsm_loadattr(vp, (struct vattr *)0); 755 if (nmp->nm_flag & NFSMNT_MYWRITE) 756 VTONFS(vp)->n_mtime = VTONFS(vp)->n_vattr.va_mtime.tv_sec; 757 else if ((nmp->nm_flag & NFSMNT_NQNFS) && 758 NQNFS_CKCACHABLE(vp, NQL_WRITE)) { 759 nfsm_dissect(tl, u_long *, 2*NFSX_UNSIGNED); 760 fxdr_hyper(tl, &frev); 761 if (QUADGT(frev, np->n_brev)) 762 np->n_brev = frev; 763 } 764 m_freem(mrep); 765 tsiz -= len; 766 } 767 nfsmout: 768 if (error) 769 uiop->uio_resid = tsiz; 770 return (error); 771 } 772 773 /* 774 * nfs mknod call 775 * This is a kludge. Use a create rpc but with the IFMT bits of the mode 776 * set to specify the file type and the size field for rdev. 777 */ 778 /* ARGSUSED */ 779 int 780 nfs_mknod(dvp, vpp, cnp, vap) 781 struct vnode *dvp; 782 struct vnode **vpp; 783 struct componentname *cnp; 784 struct vattr *vap; 785 { 786 register struct nfsv2_sattr *sp; 787 register u_long *tl; 788 register caddr_t cp; 789 register long t2; 790 caddr_t bpos, dpos; 791 int error = 0; 792 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 793 u_long rdev; 794 795 if (vap->va_type == VCHR || vap->va_type == VBLK) 796 rdev = txdr_unsigned(vap->va_rdev); 797 #ifdef FIFO 798 else if (vap->va_type == VFIFO) 799 rdev = 0xffffffff; 800 #endif /* FIFO */ 801 else { 802 VOP_ABORTOP(dvp, cnp); 803 vput(dvp); 804 return (EOPNOTSUPP); 805 } 806 nfsstats.rpccnt[NFSPROC_CREATE]++; 807 nfsm_reqhead(dvp, NFSPROC_CREATE, 808 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(cnp->cn_namelen)+NFSX_SATTR); 809 nfsm_fhtom(dvp); 810 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 811 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 812 sp->sa_mode = vtonfs_mode(vap->va_type, vap->va_mode); 813 sp->sa_uid = txdr_unsigned(cnp->cn_cred->cr_uid); 814 sp->sa_gid = txdr_unsigned(cnp->cn_cred->cr_gid); 815 sp->sa_size = rdev; 816 /* or should these be VNOVAL ?? */ 817 txdr_time(&vap->va_atime, &sp->sa_atime); 818 txdr_time(&vap->va_mtime, &sp->sa_mtime); 819 nfsm_request(dvp, NFSPROC_CREATE, cnp->cn_proc, cnp->cn_cred); 820 nfsm_reqdone; 821 FREE(cnp->cn_pnbuf, M_NAMEI); 822 VTONFS(dvp)->n_flag |= NMODIFIED; 823 vrele(dvp); 824 return (error); 825 } 826 827 /* 828 * nfs file create call 829 */ 830 int 831 nfs_create(dvp, vpp, cnp, vap) 832 struct vnode *dvp; 833 struct vnode **vpp; 834 struct componentname *cnp; 835 struct vattr *vap; 836 { 837 register struct nfsv2_sattr *sp; 838 register u_long *tl; 839 register caddr_t cp; 840 register long t1, t2; 841 caddr_t bpos, dpos, cp2; 842 int error = 0; 843 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 844 845 nfsstats.rpccnt[NFSPROC_CREATE]++; 846 nfsm_reqhead(dvp, NFSPROC_CREATE, 847 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(cnp->cn_namelen)+NFSX_SATTR); 848 nfsm_fhtom(dvp); 849 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 850 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 851 sp->sa_mode = vtonfs_mode(vap->va_type, vap->va_mode); 852 sp->sa_uid = txdr_unsigned(cnp->cn_cred->cr_uid); 853 sp->sa_gid = txdr_unsigned(cnp->cn_cred->cr_gid); 854 sp->sa_size = txdr_unsigned(0); 855 /* or should these be VNOVAL ?? */ 856 txdr_time(&vap->va_atime, &sp->sa_atime); 857 txdr_time(&vap->va_mtime, &sp->sa_mtime); 858 nfsm_request(dvp, NFSPROC_CREATE, cnp->cn_proc, cnp->cn_cred); 859 nfsm_mtofh(dvp, *vpp); 860 nfsm_reqdone; 861 FREE(cnp->cn_pnbuf, M_NAMEI); 862 VTONFS(dvp)->n_flag |= NMODIFIED; 863 vrele(dvp); 864 return (error); 865 } 866 867 /* 868 * nfs file remove call 869 * To try and make nfs semantics closer to ufs semantics, a file that has 870 * other processes using the vnode is renamed instead of removed and then 871 * removed later on the last close. 872 * - If v_usecount > 1 873 * If a rename is not already in the works 874 * call nfs_sillyrename() to set it up 875 * else 876 * do the remove rpc 877 */ 878 int 879 nfs_remove(dvp, vp, cnp) 880 struct vnode *dvp, *vp; 881 struct componentname *cnp; 882 { 883 register struct nfsnode *np = VTONFS(vp); 884 register u_long *tl; 885 register caddr_t cp; 886 register long t2; 887 caddr_t bpos, dpos; 888 int error = 0; 889 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 890 891 if (vp->v_usecount > 1) { 892 if (!np->n_sillyrename) 893 error = nfs_sillyrename(dvp, vp, cnp); 894 } else { 895 /* 896 * Purge the name cache so that the chance of a lookup for 897 * the name succeeding while the remove is in progress is 898 * minimized. Without node locking it can still happen, such 899 * that an I/O op returns ESTALE, but since you get this if 900 * another host removes the file.. 901 */ 902 cache_purge(vp); 903 /* 904 * Throw away biocache buffers. Mainly to avoid 905 * unnecessary delayed writes. 906 */ 907 vinvalbuf(vp, FALSE); 908 /* Do the rpc */ 909 nfsstats.rpccnt[NFSPROC_REMOVE]++; 910 nfsm_reqhead(dvp, NFSPROC_REMOVE, 911 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(cnp->cn_namelen)); 912 nfsm_fhtom(dvp); 913 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 914 nfsm_request(dvp, NFSPROC_REMOVE, cnp->cn_proc, cnp->cn_cred); 915 nfsm_reqdone; 916 FREE(cnp->cn_pnbuf, M_NAMEI); 917 VTONFS(dvp)->n_flag |= NMODIFIED; 918 /* 919 * Kludge City: If the first reply to the remove rpc is lost.. 920 * the reply to the retransmitted request will be ENOENT 921 * since the file was in fact removed 922 * Therefore, we cheat and return success. 923 */ 924 if (error == ENOENT) 925 error = 0; 926 } 927 np->n_attrstamp = 0; 928 vrele(dvp); 929 vrele(vp); 930 return (error); 931 } 932 933 /* 934 * nfs file remove rpc called from nfs_inactive 935 */ 936 int 937 nfs_removeit(sp, procp) 938 register struct sillyrename *sp; 939 struct proc *procp; 940 { 941 register u_long *tl; 942 register caddr_t cp; 943 register long t2; 944 caddr_t bpos, dpos; 945 int error = 0; 946 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 947 948 nfsstats.rpccnt[NFSPROC_REMOVE]++; 949 nfsm_reqhead(sp->s_dvp, NFSPROC_REMOVE, 950 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(sp->s_namlen)); 951 nfsm_fhtom(sp->s_dvp); 952 nfsm_strtom(sp->s_name, sp->s_namlen, NFS_MAXNAMLEN); 953 nfsm_request(sp->s_dvp, NFSPROC_REMOVE, procp, sp->s_cred); 954 nfsm_reqdone; 955 VTONFS(sp->s_dvp)->n_flag |= NMODIFIED; 956 return (error); 957 } 958 959 /* 960 * nfs file rename call 961 */ 962 int 963 nfs_rename(fdvp, fvp, fcnp, tdvp, tvp, tcnp) 964 struct vnode *fdvp, *fvp; 965 struct componentname *fcnp; 966 struct vnode *tdvp, *tvp; 967 struct componentname *tcnp; 968 { 969 register u_long *tl; 970 register caddr_t cp; 971 register long t2; 972 caddr_t bpos, dpos; 973 int error = 0; 974 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 975 976 nfsstats.rpccnt[NFSPROC_RENAME]++; 977 nfsm_reqhead(fdvp, NFSPROC_RENAME, 978 (NFSX_FH+NFSX_UNSIGNED)*2+nfsm_rndup(fcnp->cn_namelen)+ 979 nfsm_rndup(fcnp->cn_namelen)); /* or fcnp->cn_cred?*/ 980 nfsm_fhtom(fdvp); 981 nfsm_strtom(fcnp->cn_nameptr, fcnp->cn_namelen, NFS_MAXNAMLEN); 982 nfsm_fhtom(tdvp); 983 nfsm_strtom(tcnp->cn_nameptr, tcnp->cn_namelen, NFS_MAXNAMLEN); 984 nfsm_request(fdvp, NFSPROC_RENAME, tcnp->cn_proc, tcnp->cn_cred); 985 nfsm_reqdone; 986 VTONFS(fdvp)->n_flag |= NMODIFIED; 987 VTONFS(tdvp)->n_flag |= NMODIFIED; 988 if (fvp->v_type == VDIR) { 989 if (tvp != NULL && tvp->v_type == VDIR) 990 cache_purge(tdvp); 991 cache_purge(fdvp); 992 } 993 if (tdvp == tvp) 994 vrele(tdvp); 995 else 996 vput(tdvp); 997 if (tvp) 998 vput(tvp); 999 vrele(fdvp); 1000 vrele(fvp); 1001 /* 1002 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry. 1003 */ 1004 if (error == ENOENT) 1005 error = 0; 1006 return (error); 1007 } 1008 1009 /* 1010 * nfs file rename rpc called from nfs_remove() above 1011 */ 1012 int 1013 nfs_renameit(sdvp, scnp, sp) 1014 struct vnode *sdvp; 1015 struct componentname *scnp; 1016 register struct sillyrename *sp; 1017 { 1018 register u_long *tl; 1019 register caddr_t cp; 1020 register long t2; 1021 caddr_t bpos, dpos; 1022 int error = 0; 1023 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1024 1025 nfsstats.rpccnt[NFSPROC_RENAME]++; 1026 nfsm_reqhead(sdvp, NFSPROC_RENAME, 1027 (NFSX_FH+NFSX_UNSIGNED)*2+nfsm_rndup(scnp->cn_namelen)+ 1028 nfsm_rndup(sp->s_namlen)); 1029 nfsm_fhtom(sdvp); 1030 nfsm_strtom(scnp->cn_nameptr, scnp->cn_namelen, NFS_MAXNAMLEN); 1031 nfsm_fhtom(sdvp); 1032 nfsm_strtom(sp->s_name, sp->s_namlen, NFS_MAXNAMLEN); 1033 nfsm_request(sdvp, NFSPROC_RENAME, scnp->cn_proc, scnp->cn_cred); 1034 nfsm_reqdone; 1035 FREE(scnp->cn_pnbuf, M_NAMEI); 1036 VTONFS(sdvp)->n_flag |= NMODIFIED; 1037 return (error); 1038 } 1039 1040 /* 1041 * nfs hard link create call 1042 */ 1043 int 1044 nfs_link(tdvp, vp, cnp) 1045 struct vnode *tdvp; 1046 register struct vnode *vp; /* source vnode */ 1047 struct componentname *cnp; 1048 { 1049 register u_long *tl; 1050 register caddr_t cp; 1051 register long t2; 1052 caddr_t bpos, dpos; 1053 int error = 0; 1054 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1055 1056 nfsstats.rpccnt[NFSPROC_LINK]++; 1057 nfsm_reqhead(vp, NFSPROC_LINK, 1058 NFSX_FH*2+NFSX_UNSIGNED+nfsm_rndup(cnp->cn_namelen)); 1059 nfsm_fhtom(vp); 1060 nfsm_fhtom(tdvp); 1061 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1062 nfsm_request(vp, NFSPROC_LINK, cnp->cn_proc, cnp->cn_cred); 1063 nfsm_reqdone; 1064 FREE(cnp->cn_pnbuf, M_NAMEI); 1065 VTONFS(vp)->n_attrstamp = 0; 1066 VTONFS(tdvp)->n_flag |= NMODIFIED; 1067 vrele(tdvp); 1068 /* 1069 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 1070 */ 1071 if (error == EEXIST) 1072 error = 0; 1073 return (error); 1074 } 1075 1076 /* 1077 * nfs symbolic link create call 1078 */ 1079 /* start here */ 1080 int 1081 nfs_symlink(dvp, vpp, cnp, vap, nm) 1082 struct vnode *dvp; 1083 struct vnode **vpp; 1084 struct componentname *cnp; 1085 struct vattr *vap; 1086 char *nm; 1087 { 1088 register struct nfsv2_sattr *sp; 1089 register u_long *tl; 1090 register caddr_t cp; 1091 register long t2; 1092 caddr_t bpos, dpos; 1093 int slen, error = 0; 1094 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1095 1096 nfsstats.rpccnt[NFSPROC_SYMLINK]++; 1097 slen = strlen(nm); 1098 nfsm_reqhead(dvp, NFSPROC_SYMLINK, 1099 NFSX_FH+2*NFSX_UNSIGNED+nfsm_rndup(cnp->cn_namelen)+nfsm_rndup(slen)+NFSX_SATTR); 1100 nfsm_fhtom(dvp); 1101 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1102 nfsm_strtom(nm, slen, NFS_MAXPATHLEN); 1103 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 1104 sp->sa_mode = vtonfs_mode(VLNK, vap->va_mode); 1105 sp->sa_uid = txdr_unsigned(cnp->cn_cred->cr_uid); 1106 sp->sa_gid = txdr_unsigned(cnp->cn_cred->cr_gid); 1107 sp->sa_size = txdr_unsigned(VNOVAL); 1108 txdr_time(&vap->va_atime, &sp->sa_atime); /* or VNOVAL ?? */ 1109 txdr_time(&vap->va_mtime, &sp->sa_mtime); /* or VNOVAL ?? */ 1110 nfsm_request(dvp, NFSPROC_SYMLINK, cnp->cn_proc, cnp->cn_cred); 1111 nfsm_reqdone; 1112 FREE(cnp->cn_pnbuf, M_NAMEI); 1113 VTONFS(dvp)->n_flag |= NMODIFIED; 1114 vrele(dvp); 1115 /* 1116 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 1117 */ 1118 if (error == EEXIST) 1119 error = 0; 1120 return (error); 1121 } 1122 1123 /* 1124 * nfs make dir call 1125 */ 1126 int 1127 nfs_mkdir(dvp, vpp, cnp, vap) 1128 struct vnode *dvp; 1129 struct vnode **vpp; 1130 struct componentname *cnp; 1131 struct vattr *vap; 1132 { 1133 register struct nfsv2_sattr *sp; 1134 register u_long *tl; 1135 register caddr_t cp; 1136 register long t1, t2; 1137 register int len; 1138 caddr_t bpos, dpos, cp2; 1139 int error = 0, firsttry = 1; 1140 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1141 1142 len = cnp->cn_namelen; 1143 nfsstats.rpccnt[NFSPROC_MKDIR]++; 1144 nfsm_reqhead(dvp, NFSPROC_MKDIR, 1145 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len)+NFSX_SATTR); 1146 nfsm_fhtom(dvp); 1147 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 1148 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 1149 sp->sa_mode = vtonfs_mode(VDIR, vap->va_mode); 1150 sp->sa_uid = txdr_unsigned(cnp->cn_cred->cr_uid); 1151 sp->sa_gid = txdr_unsigned(cnp->cn_cred->cr_gid); 1152 sp->sa_size = txdr_unsigned(VNOVAL); 1153 txdr_time(&vap->va_atime, &sp->sa_atime); /* or VNOVAL ?? */ 1154 txdr_time(&vap->va_mtime, &sp->sa_mtime); /* or VNOVAL ?? */ 1155 nfsm_request(dvp, NFSPROC_MKDIR, cnp->cn_proc, cnp->cn_cred); 1156 nfsm_mtofh(dvp, *vpp); 1157 nfsm_reqdone; 1158 VTONFS(dvp)->n_flag |= NMODIFIED; 1159 /* 1160 * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry 1161 * if we can succeed in looking up the directory. 1162 * "firsttry" is necessary since the macros may "goto nfsmout" which 1163 * is above the if on errors. (Ugh) 1164 */ 1165 if (error == EEXIST && firsttry) { 1166 firsttry = 0; 1167 error = 0; 1168 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 1169 *vpp = NULL; 1170 nfsm_reqhead(dvp, NFSPROC_LOOKUP, 1171 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len)); 1172 nfsm_fhtom(dvp); 1173 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 1174 nfsm_request(dvp, NFSPROC_LOOKUP, cnp->cn_proc, cnp->cn_cred); 1175 nfsm_mtofh(dvp, *vpp); 1176 if ((*vpp)->v_type != VDIR) { 1177 vput(*vpp); 1178 error = EEXIST; 1179 } 1180 m_freem(mrep); 1181 } 1182 FREE(cnp->cn_pnbuf, M_NAMEI); 1183 vrele(dvp); 1184 return (error); 1185 } 1186 1187 /* 1188 * nfs remove directory call 1189 */ 1190 int 1191 nfs_rmdir(dvp, vp, cnp) 1192 struct vnode *dvp, *vp; 1193 struct componentname *cnp; 1194 { 1195 register u_long *tl; 1196 register caddr_t cp; 1197 register long t2; 1198 caddr_t bpos, dpos; 1199 int error = 0; 1200 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1201 1202 if (dvp == vp) { 1203 vrele(dvp); 1204 vrele(dvp); 1205 FREE(cnp->cn_pnbuf, M_NAMEI); 1206 return (EINVAL); 1207 } 1208 nfsstats.rpccnt[NFSPROC_RMDIR]++; 1209 nfsm_reqhead(dvp, NFSPROC_RMDIR, 1210 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(cnp->cn_namelen)); 1211 nfsm_fhtom(dvp); 1212 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1213 nfsm_request(dvp, NFSPROC_RMDIR, cnp->cn_proc, cnp->cn_cred); 1214 nfsm_reqdone; 1215 FREE(cnp->cn_pnbuf, M_NAMEI); 1216 VTONFS(dvp)->n_flag |= NMODIFIED; 1217 cache_purge(dvp); 1218 cache_purge(vp); 1219 vrele(vp); 1220 vrele(dvp); 1221 /* 1222 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry. 1223 */ 1224 if (error == ENOENT) 1225 error = 0; 1226 return (error); 1227 } 1228 1229 /* 1230 * nfs readdir call 1231 * Although cookie is defined as opaque, I translate it to/from net byte 1232 * order so that it looks more sensible. This appears consistent with the 1233 * Ultrix implementation of NFS. 1234 */ 1235 int 1236 nfs_readdir(vp, uiop, cred, eofflagp) 1237 register struct vnode *vp; 1238 struct uio *uiop; 1239 struct ucred *cred; 1240 int *eofflagp; 1241 { 1242 register struct nfsnode *np = VTONFS(vp); 1243 int tresid, error; 1244 struct vattr vattr; 1245 1246 if (vp->v_type != VDIR) 1247 return (EPERM); 1248 /* 1249 * First, check for hit on the EOF offset cache 1250 */ 1251 if (uiop->uio_offset != 0 && uiop->uio_offset == np->n_direofoffset && 1252 (np->n_flag & NMODIFIED) == 0) { 1253 if (VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS) { 1254 if (NQNFS_CKCACHABLE(vp, NQL_READ)) { 1255 *eofflagp = 1; 1256 nfsstats.direofcache_hits++; 1257 return (0); 1258 } 1259 } else if (nfs_getattr(vp, &vattr, cred, uiop->uio_procp) == 0 && 1260 np->n_mtime == vattr.va_mtime.tv_sec) { 1261 *eofflagp = 1; 1262 nfsstats.direofcache_hits++; 1263 return (0); 1264 } 1265 } 1266 1267 /* 1268 * Call nfs_bioread() to do the real work. 1269 */ 1270 tresid = uiop->uio_resid; 1271 error = nfs_bioread(vp, uiop, 0, cred); 1272 1273 if (!error && uiop->uio_resid == tresid) { 1274 *eofflagp = 1; 1275 nfsstats.direofcache_misses++; 1276 } else 1277 *eofflagp = 0; 1278 return (error); 1279 } 1280 1281 /* 1282 * Readdir rpc call. 1283 * Called from below the buffer cache by nfs_doio(). 1284 */ 1285 int 1286 nfs_readdirrpc(vp, uiop, cred) 1287 register struct vnode *vp; 1288 struct uio *uiop; 1289 struct ucred *cred; 1290 { 1291 register long len; 1292 register struct readdir *dp; 1293 register u_long *tl; 1294 register caddr_t cp; 1295 register long t1; 1296 long tlen, lastlen; 1297 caddr_t bpos, dpos, cp2; 1298 int error = 0; 1299 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1300 struct mbuf *md2; 1301 caddr_t dpos2; 1302 int siz; 1303 int more_dirs = 1; 1304 off_t off, savoff; 1305 struct readdir *savdp; 1306 struct nfsmount *nmp; 1307 struct nfsnode *np = VTONFS(vp); 1308 long tresid; 1309 1310 nmp = VFSTONFS(vp->v_mount); 1311 tresid = uiop->uio_resid; 1312 /* 1313 * Loop around doing readdir rpc's of size uio_resid or nm_rsize, 1314 * whichever is smaller, truncated to a multiple of NFS_DIRBLKSIZ. 1315 * The stopping criteria is EOF or buffer full. 1316 */ 1317 while (more_dirs && uiop->uio_resid >= NFS_DIRBLKSIZ) { 1318 nfsstats.rpccnt[NFSPROC_READDIR]++; 1319 nfsm_reqhead(vp, NFSPROC_READDIR, 1320 NFSX_FH+2*NFSX_UNSIGNED); 1321 nfsm_fhtom(vp); 1322 nfsm_build(tl, u_long *, 2*NFSX_UNSIGNED); 1323 *tl++ = txdr_unsigned(uiop->uio_offset); 1324 *tl = txdr_unsigned(((uiop->uio_resid > nmp->nm_rsize) ? 1325 nmp->nm_rsize : uiop->uio_resid) & ~(NFS_DIRBLKSIZ-1)); 1326 nfsm_request(vp, NFSPROC_READDIR, uiop->uio_procp, cred); 1327 siz = 0; 1328 nfsm_dissect(tl, u_long *, NFSX_UNSIGNED); 1329 more_dirs = fxdr_unsigned(int, *tl); 1330 1331 /* Save the position so that we can do nfsm_mtouio() later */ 1332 dpos2 = dpos; 1333 md2 = md; 1334 1335 /* loop thru the dir entries, doctoring them to 4bsd form */ 1336 off = uiop->uio_offset; 1337 #ifdef lint 1338 dp = (struct readdir *)0; 1339 #endif /* lint */ 1340 while (more_dirs && siz < uiop->uio_resid) { 1341 savoff = off; /* Hold onto offset and dp */ 1342 savdp = dp; 1343 nfsm_dissecton(tl, u_long *, 2*NFSX_UNSIGNED); 1344 dp = (struct readdir *)tl; 1345 dp->d_ino = fxdr_unsigned(u_long, *tl++); 1346 len = fxdr_unsigned(int, *tl); 1347 if (len <= 0 || len > NFS_MAXNAMLEN) { 1348 error = EBADRPC; 1349 m_freem(mrep); 1350 goto nfsmout; 1351 } 1352 dp->d_namlen = (u_short)len; 1353 nfsm_adv(len); /* Point past name */ 1354 tlen = nfsm_rndup(len); 1355 /* 1356 * This should not be necessary, but some servers have 1357 * broken XDR such that these bytes are not null filled. 1358 */ 1359 if (tlen != len) { 1360 *dpos = '\0'; /* Null-terminate */ 1361 nfsm_adv(tlen - len); 1362 len = tlen; 1363 } 1364 nfsm_dissecton(tl, u_long *, 2*NFSX_UNSIGNED); 1365 off = fxdr_unsigned(off_t, *tl); 1366 *tl++ = 0; /* Ensures null termination of name */ 1367 more_dirs = fxdr_unsigned(int, *tl); 1368 dp->d_reclen = len+4*NFSX_UNSIGNED; 1369 siz += dp->d_reclen; 1370 } 1371 /* 1372 * If at end of rpc data, get the eof boolean 1373 */ 1374 if (!more_dirs) { 1375 nfsm_dissecton(tl, u_long *, NFSX_UNSIGNED); 1376 more_dirs = (fxdr_unsigned(int, *tl) == 0); 1377 1378 /* 1379 * If at EOF, cache directory offset 1380 */ 1381 if (!more_dirs) 1382 np->n_direofoffset = off; 1383 } 1384 /* 1385 * If there is too much to fit in the data buffer, use savoff and 1386 * savdp to trim off the last record. 1387 * --> we are not at eof 1388 */ 1389 if (siz > uiop->uio_resid) { 1390 off = savoff; 1391 siz -= dp->d_reclen; 1392 dp = savdp; 1393 more_dirs = 0; /* Paranoia */ 1394 } 1395 if (siz > 0) { 1396 lastlen = dp->d_reclen; 1397 md = md2; 1398 dpos = dpos2; 1399 nfsm_mtouio(uiop, siz); 1400 uiop->uio_offset = off; 1401 } else 1402 more_dirs = 0; /* Ugh, never happens, but in case.. */ 1403 m_freem(mrep); 1404 } 1405 /* 1406 * Fill last record, iff any, out to a multiple of NFS_DIRBLKSIZ 1407 * by increasing d_reclen for the last record. 1408 */ 1409 if (uiop->uio_resid < tresid) { 1410 len = uiop->uio_resid & (NFS_DIRBLKSIZ - 1); 1411 if (len > 0) { 1412 dp = (struct readdir *) 1413 (uiop->uio_iov->iov_base - lastlen); 1414 dp->d_reclen += len; 1415 uiop->uio_iov->iov_base += len; 1416 uiop->uio_iov->iov_len -= len; 1417 uiop->uio_resid -= len; 1418 } 1419 } 1420 nfsmout: 1421 return (error); 1422 } 1423 1424 /* 1425 * Nqnfs readdir_and_lookup RPC. Used in place of nfs_readdirrpc() when 1426 * the "rdirlook" mount option is specified. 1427 */ 1428 int 1429 nfs_readdirlookrpc(vp, uiop, cred) 1430 struct vnode *vp; 1431 register struct uio *uiop; 1432 struct ucred *cred; 1433 { 1434 register int len; 1435 register struct readdir *dp; 1436 register u_long *tl; 1437 register caddr_t cp; 1438 register long t1; 1439 caddr_t bpos, dpos, cp2; 1440 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1441 struct nameidata nami, *ndp = &nami; 1442 struct componentname *cnp = &ndp->ni_cnd; 1443 off_t off, endoff; 1444 time_t reqtime, ltime; 1445 struct nfsmount *nmp; 1446 struct nfsnode *np, *tp; 1447 struct vnode *newvp; 1448 nfsv2fh_t *fhp; 1449 u_long fileno; 1450 u_quad_t frev; 1451 int error = 0, tlen, more_dirs = 1, tresid, doit, bigenough, i; 1452 int cachable; 1453 1454 if (uiop->uio_iovcnt != 1) 1455 panic("nfs rdirlook"); 1456 nmp = VFSTONFS(vp->v_mount); 1457 tresid = uiop->uio_resid; 1458 ndp->ni_dvp = vp; 1459 newvp = NULLVP; 1460 /* 1461 * Loop around doing readdir rpc's of size uio_resid or nm_rsize, 1462 * whichever is smaller, truncated to a multiple of NFS_DIRBLKSIZ. 1463 * The stopping criteria is EOF or buffer full. 1464 */ 1465 while (more_dirs && uiop->uio_resid >= NFS_DIRBLKSIZ) { 1466 nfsstats.rpccnt[NQNFSPROC_READDIRLOOK]++; 1467 nfsm_reqhead(vp, NQNFSPROC_READDIRLOOK, 1468 NFSX_FH+3*NFSX_UNSIGNED); 1469 nfsm_fhtom(vp); 1470 nfsm_build(tl, u_long *, 3*NFSX_UNSIGNED); 1471 *tl++ = txdr_unsigned(uiop->uio_offset); 1472 *tl++ = txdr_unsigned(((uiop->uio_resid > nmp->nm_rsize) ? 1473 nmp->nm_rsize : uiop->uio_resid) & ~(NFS_DIRBLKSIZ-1)); 1474 *tl = txdr_unsigned(nmp->nm_leaseterm); 1475 reqtime = time.tv_sec; 1476 nfsm_request(vp, NQNFSPROC_READDIRLOOK, uiop->uio_procp, cred); 1477 nfsm_dissect(tl, u_long *, NFSX_UNSIGNED); 1478 more_dirs = fxdr_unsigned(int, *tl); 1479 1480 /* loop thru the dir entries, doctoring them to 4bsd form */ 1481 off = uiop->uio_offset; 1482 bigenough = 1; 1483 while (more_dirs && bigenough) { 1484 doit = 1; 1485 nfsm_dissect(tl, u_long *, 4*NFSX_UNSIGNED); 1486 cachable = fxdr_unsigned(int, *tl++); 1487 ltime = reqtime + fxdr_unsigned(int, *tl++); 1488 fxdr_hyper(tl, &frev); 1489 nfsm_dissect(fhp, nfsv2fh_t *, NFSX_FH); 1490 if (!bcmp(VTONFS(vp)->n_fh.fh_bytes, (caddr_t)fhp, NFSX_FH)) { 1491 VREF(vp); 1492 newvp = vp; 1493 np = VTONFS(vp); 1494 } else { 1495 if (error = nfs_nget(vp->v_mount, fhp, &np)) 1496 doit = 0; 1497 newvp = NFSTOV(np); 1498 } 1499 if (error = nfs_loadattrcache(&newvp, &md, &dpos, 1500 (struct vattr *)0)) 1501 doit = 0; 1502 nfsm_dissect(tl, u_long *, 2*NFSX_UNSIGNED); 1503 fileno = fxdr_unsigned(u_long, *tl++); 1504 len = fxdr_unsigned(int, *tl); 1505 if (len <= 0 || len > NFS_MAXNAMLEN) { 1506 error = EBADRPC; 1507 m_freem(mrep); 1508 goto nfsmout; 1509 } 1510 tlen = (len + 4) & ~0x3; 1511 if ((tlen + DIRHDSIZ) > uiop->uio_resid) 1512 bigenough = 0; 1513 if (bigenough && doit) { 1514 dp = (struct readdir *)uiop->uio_iov->iov_base; 1515 dp->d_ino = fileno; 1516 dp->d_namlen = len; 1517 dp->d_reclen = tlen + DIRHDSIZ; 1518 uiop->uio_resid -= DIRHDSIZ; 1519 uiop->uio_iov->iov_base += DIRHDSIZ; 1520 uiop->uio_iov->iov_len -= DIRHDSIZ; 1521 cnp->cn_nameptr = uiop->uio_iov->iov_base; 1522 cnp->cn_namelen = len; 1523 ndp->ni_vp = newvp; 1524 nfsm_mtouio(uiop, len); 1525 cp = uiop->uio_iov->iov_base; 1526 tlen -= len; 1527 for (i = 0; i < tlen; i++) 1528 *cp++ = '\0'; 1529 uiop->uio_iov->iov_base += tlen; 1530 uiop->uio_iov->iov_len -= tlen; 1531 uiop->uio_resid -= tlen; 1532 cnp->cn_hash = 0; 1533 for (cp = cnp->cn_nameptr, i = 1; i <= len; i++, cp++) 1534 cnp->cn_hash += (unsigned char)*cp * i; 1535 if (ltime > time.tv_sec) { 1536 if (np->n_tnext) { 1537 if (np->n_tnext == (struct nfsnode *)nmp) 1538 nmp->nm_tprev = np->n_tprev; 1539 else 1540 np->n_tnext->n_tprev = np->n_tprev; 1541 if (np->n_tprev == (struct nfsnode *)nmp) 1542 nmp->nm_tnext = np->n_tnext; 1543 else 1544 np->n_tprev->n_tnext = np->n_tnext; 1545 } else 1546 np->n_flag &= ~NQNFSWRITE; 1547 if (cachable) 1548 np->n_flag &= ~NQNFSNONCACHE; 1549 else 1550 np->n_flag |= NQNFSNONCACHE; 1551 np->n_expiry = ltime; 1552 np->n_lrev = frev; 1553 tp = nmp->nm_tprev; 1554 while (tp != (struct nfsnode *)nmp && tp->n_expiry > np->n_expiry) 1555 tp = tp->n_tprev; 1556 if (tp == (struct nfsnode *)nmp) { 1557 np->n_tnext = nmp->nm_tnext; 1558 nmp->nm_tnext = np; 1559 } else { 1560 np->n_tnext = tp->n_tnext; 1561 tp->n_tnext = np; 1562 } 1563 np->n_tprev = tp; 1564 if (np->n_tnext == (struct nfsnode *)nmp) 1565 nmp->nm_tprev = np; 1566 else 1567 np->n_tnext->n_tprev = np; 1568 cache_enter(ndp->ni_dvp, ndp->ni_vp, cnp); 1569 } 1570 } else { 1571 nfsm_adv(nfsm_rndup(len)); 1572 } 1573 if (newvp != NULLVP) { 1574 vrele(newvp); 1575 newvp = NULLVP; 1576 } 1577 nfsm_dissect(tl, u_long *, 2*NFSX_UNSIGNED); 1578 if (bigenough) 1579 endoff = off = fxdr_unsigned(off_t, *tl++); 1580 else 1581 endoff = fxdr_unsigned(off_t, *tl++); 1582 more_dirs = fxdr_unsigned(int, *tl); 1583 } 1584 /* 1585 * If at end of rpc data, get the eof boolean 1586 */ 1587 if (!more_dirs) { 1588 nfsm_dissect(tl, u_long *, NFSX_UNSIGNED); 1589 more_dirs = (fxdr_unsigned(int, *tl) == 0); 1590 1591 /* 1592 * If at EOF, cache directory offset 1593 */ 1594 if (!more_dirs) 1595 VTONFS(vp)->n_direofoffset = endoff; 1596 } 1597 if (uiop->uio_resid < tresid) 1598 uiop->uio_offset = off; 1599 else 1600 more_dirs = 0; 1601 m_freem(mrep); 1602 } 1603 /* 1604 * Fill last record, iff any, out to a multiple of NFS_DIRBLKSIZ 1605 * by increasing d_reclen for the last record. 1606 */ 1607 if (uiop->uio_resid < tresid) { 1608 len = uiop->uio_resid & (NFS_DIRBLKSIZ - 1); 1609 if (len > 0) { 1610 dp->d_reclen += len; 1611 uiop->uio_iov->iov_base += len; 1612 uiop->uio_iov->iov_len -= len; 1613 uiop->uio_resid -= len; 1614 } 1615 } 1616 nfsmout: 1617 if (newvp != NULLVP) 1618 vrele(newvp); 1619 return (error); 1620 } 1621 static char hextoasc[] = "0123456789abcdef"; 1622 1623 /* 1624 * Silly rename. To make the NFS filesystem that is stateless look a little 1625 * more like the "ufs" a remove of an active vnode is translated to a rename 1626 * to a funny looking filename that is removed by nfs_inactive on the 1627 * nfsnode. There is the potential for another process on a different client 1628 * to create the same funny name between the nfs_lookitup() fails and the 1629 * nfs_rename() completes, but... 1630 */ 1631 int 1632 nfs_sillyrename(dvp, vp, cnp) 1633 struct vnode *dvp, *vp; 1634 struct componentname *cnp; 1635 { 1636 register struct nfsnode *np; 1637 register struct sillyrename *sp; 1638 int error; 1639 short pid; 1640 1641 cache_purge(dvp); 1642 np = VTONFS(vp); 1643 #ifdef SILLYSEPARATE 1644 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename), 1645 M_NFSREQ, M_WAITOK); 1646 #else 1647 sp = &np->n_silly; 1648 #endif 1649 sp->s_cred = crdup(cnp->cn_cred); 1650 sp->s_dvp = dvp; 1651 VREF(dvp); 1652 1653 /* Fudge together a funny name */ 1654 pid = cnp->cn_proc->p_pid; 1655 bcopy(".nfsAxxxx4.4", sp->s_name, 13); 1656 sp->s_namlen = 12; 1657 sp->s_name[8] = hextoasc[pid & 0xf]; 1658 sp->s_name[7] = hextoasc[(pid >> 4) & 0xf]; 1659 sp->s_name[6] = hextoasc[(pid >> 8) & 0xf]; 1660 sp->s_name[5] = hextoasc[(pid >> 12) & 0xf]; 1661 1662 /* Try lookitups until we get one that isn't there */ 1663 while (nfs_lookitup(sp, (nfsv2fh_t *)0, cnp->cn_proc) == 0) { 1664 sp->s_name[4]++; 1665 if (sp->s_name[4] > 'z') { 1666 error = EINVAL; 1667 goto bad; 1668 } 1669 } 1670 if (error = nfs_renameit(dvp, cnp, sp)) 1671 goto bad; 1672 nfs_lookitup(sp, &np->n_fh, cnp->cn_proc); 1673 np->n_sillyrename = sp; 1674 return (0); 1675 bad: 1676 vrele(sp->s_dvp); 1677 crfree(sp->s_cred); 1678 #ifdef SILLYSEPARATE 1679 free((caddr_t)sp, M_NFSREQ); 1680 #endif 1681 return (error); 1682 } 1683 1684 /* 1685 * Look up a file name for silly rename stuff. 1686 * Just like nfs_lookup() except that it doesn't load returned values 1687 * into the nfsnode table. 1688 * If fhp != NULL it copies the returned file handle out 1689 */ 1690 int 1691 nfs_lookitup(sp, fhp, procp) 1692 register struct sillyrename *sp; 1693 nfsv2fh_t *fhp; 1694 struct proc *procp; 1695 { 1696 register struct vnode *vp = sp->s_dvp; 1697 register u_long *tl; 1698 register caddr_t cp; 1699 register long t1, t2; 1700 caddr_t bpos, dpos, cp2; 1701 u_long xid; 1702 int error = 0; 1703 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1704 long len; 1705 1706 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 1707 len = sp->s_namlen; 1708 nfsm_reqhead(vp, NFSPROC_LOOKUP, NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len)); 1709 nfsm_fhtom(vp); 1710 nfsm_strtom(sp->s_name, len, NFS_MAXNAMLEN); 1711 nfsm_request(vp, NFSPROC_LOOKUP, procp, sp->s_cred); 1712 if (fhp != NULL) { 1713 nfsm_dissect(cp, caddr_t, NFSX_FH); 1714 bcopy(cp, (caddr_t)fhp, NFSX_FH); 1715 } 1716 nfsm_reqdone; 1717 return (error); 1718 } 1719 1720 /* 1721 * Kludge City.. 1722 * - make nfs_bmap() essentially a no-op that does no translation 1723 * - do nfs_strategy() by faking physical I/O with nfs_readrpc/nfs_writerpc 1724 * after mapping the physical addresses into Kernel Virtual space in the 1725 * nfsiobuf area. 1726 * (Maybe I could use the process's page mapping, but I was concerned that 1727 * Kernel Write might not be enabled and also figured copyout() would do 1728 * a lot more work than bcopy() and also it currently happens in the 1729 * context of the swapper process (2). 1730 */ 1731 int 1732 nfs_bmap(vp, bn, vpp, bnp) 1733 struct vnode *vp; 1734 daddr_t bn; 1735 struct vnode **vpp; 1736 daddr_t *bnp; 1737 { 1738 if (vpp != NULL) 1739 *vpp = vp; 1740 if (bnp != NULL) 1741 *bnp = bn * btodb(vp->v_mount->mnt_stat.f_iosize); 1742 return (0); 1743 } 1744 1745 /* 1746 * Strategy routine for phys. i/o 1747 * If the biod's are running, queue a request 1748 * otherwise just call nfs_doio() to get it done 1749 */ 1750 int 1751 nfs_strategy(bp) 1752 register struct buf *bp; 1753 { 1754 register struct buf *dp; 1755 register int i; 1756 int error = 0; 1757 int fnd = 0; 1758 1759 /* 1760 * Set b_proc. It seems a bit silly to do it here, but since bread() 1761 * doesn't set it, I will. 1762 * Set b_proc == NULL for asynchronous ops, since these may still 1763 * be hanging about after the process terminates. 1764 */ 1765 if ((bp->b_flags & B_PHYS) == 0) { 1766 if (bp->b_flags & B_ASYNC) 1767 bp->b_proc = (struct proc *)0; 1768 else 1769 bp->b_proc = curproc; 1770 } 1771 /* 1772 * If the op is asynchronous and an i/o daemon is waiting 1773 * queue the request, wake it up and wait for completion 1774 * otherwise just do it ourselves. 1775 */ 1776 if ((bp->b_flags & B_ASYNC) == 0 || nfs_numasync == 0) 1777 return (nfs_doio(bp)); 1778 for (i = 0; i < NFS_MAXASYNCDAEMON; i++) { 1779 if (nfs_iodwant[i]) { 1780 dp = &nfs_bqueue; 1781 if (dp->b_actf == NULL) { 1782 dp->b_actl = bp; 1783 bp->b_actf = dp; 1784 } else { 1785 dp->b_actf->b_actl = bp; 1786 bp->b_actf = dp->b_actf; 1787 } 1788 dp->b_actf = bp; 1789 bp->b_actl = dp; 1790 fnd++; 1791 wakeup((caddr_t)&nfs_iodwant[i]); 1792 break; 1793 } 1794 } 1795 if (!fnd) 1796 error = nfs_doio(bp); 1797 return (error); 1798 } 1799 1800 /* 1801 * Fun and games with i/o 1802 * Essentially play ubasetup() and disk interrupt service routine by 1803 * mapping the data buffer into kernel virtual space and doing the 1804 * nfs read or write rpc's from it. 1805 * If the nfsiod's are not running, this is just called from nfs_strategy(), 1806 * otherwise it is called by the nfsiods to do what would normally be 1807 * partially disk interrupt driven. 1808 */ 1809 int 1810 nfs_doio(bp) 1811 register struct buf *bp; 1812 { 1813 register struct uio *uiop; 1814 register struct vnode *vp; 1815 struct nfsnode *np; 1816 struct ucred *cr; 1817 int error; 1818 struct uio uio; 1819 struct iovec io; 1820 1821 vp = bp->b_vp; 1822 np = VTONFS(vp); 1823 uiop = &uio; 1824 uiop->uio_iov = &io; 1825 uiop->uio_iovcnt = 1; 1826 uiop->uio_segflg = UIO_SYSSPACE; 1827 uiop->uio_procp = bp->b_proc; 1828 1829 /* 1830 * For phys i/o, map the b_addr into kernel virtual space using 1831 * the Nfsiomap pte's 1832 * Also, add a temporary b_rcred for reading using the process's uid 1833 * and a guess at a group 1834 */ 1835 if (bp->b_flags & B_PHYS) { 1836 if (bp->b_flags & B_DIRTY) 1837 uiop->uio_procp = pageproc; 1838 cr = crcopy(uiop->uio_procp->p_ucred); 1839 /* mapping was already done by vmapbuf */ 1840 io.iov_base = bp->b_un.b_addr; 1841 1842 /* 1843 * And do the i/o rpc 1844 */ 1845 io.iov_len = uiop->uio_resid = bp->b_bcount; 1846 uiop->uio_offset = bp->b_blkno * DEV_BSIZE; 1847 if (bp->b_flags & B_READ) { 1848 uiop->uio_rw = UIO_READ; 1849 nfsstats.read_physios++; 1850 bp->b_error = error = nfs_readrpc(vp, uiop, cr); 1851 (void) vnode_pager_uncache(vp); 1852 } else { 1853 uiop->uio_rw = UIO_WRITE; 1854 nfsstats.write_physios++; 1855 bp->b_error = error = nfs_writerpc(vp, uiop, cr); 1856 } 1857 1858 /* 1859 * Finally, release pte's used by physical i/o 1860 */ 1861 crfree(cr); 1862 } else { 1863 if (bp->b_flags & B_READ) { 1864 io.iov_len = uiop->uio_resid = bp->b_bcount; 1865 io.iov_base = bp->b_un.b_addr; 1866 uiop->uio_rw = UIO_READ; 1867 switch (vp->v_type) { 1868 case VREG: 1869 uiop->uio_offset = bp->b_blkno * DEV_BSIZE; 1870 nfsstats.read_bios++; 1871 error = nfs_readrpc(vp, uiop, bp->b_rcred); 1872 break; 1873 case VLNK: 1874 uiop->uio_offset = 0; 1875 nfsstats.readlink_bios++; 1876 error = nfs_readlinkrpc(vp, uiop, bp->b_rcred); 1877 break; 1878 case VDIR: 1879 uiop->uio_offset = bp->b_lblkno; 1880 nfsstats.readdir_bios++; 1881 if (VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_RDIRALOOK) 1882 error = nfs_readdirlookrpc(vp, uiop, bp->b_rcred); 1883 else 1884 error = nfs_readdirrpc(vp, uiop, bp->b_rcred); 1885 /* 1886 * Save offset cookie in b_blkno. 1887 */ 1888 bp->b_blkno = uiop->uio_offset; 1889 break; 1890 }; 1891 bp->b_error = error; 1892 } else { 1893 io.iov_len = uiop->uio_resid = bp->b_dirtyend 1894 - bp->b_dirtyoff; 1895 uiop->uio_offset = (bp->b_blkno * DEV_BSIZE) 1896 + bp->b_dirtyoff; 1897 io.iov_base = bp->b_un.b_addr + bp->b_dirtyoff; 1898 uiop->uio_rw = UIO_WRITE; 1899 nfsstats.write_bios++; 1900 bp->b_error = error = nfs_writerpc(vp, uiop, 1901 bp->b_wcred); 1902 if (error) { 1903 np->n_error = error; 1904 np->n_flag |= NWRITEERR; 1905 } 1906 bp->b_dirtyoff = bp->b_dirtyend = 0; 1907 } 1908 } 1909 if (error) 1910 bp->b_flags |= B_ERROR; 1911 bp->b_resid = uiop->uio_resid; 1912 biodone(bp); 1913 return (error); 1914 } 1915 1916 /* 1917 * Mmap a file 1918 * 1919 * NB Currently unsupported. 1920 */ 1921 /* ARGSUSED */ 1922 int 1923 nfs_mmap(vp, fflags, cred, p) 1924 struct vnode *vp; 1925 int fflags; 1926 struct ucred *cred; 1927 struct proc *p; 1928 { 1929 1930 return (EINVAL); 1931 } 1932 1933 /* 1934 * Flush all the blocks associated with a vnode. 1935 * Walk through the buffer pool and push any dirty pages 1936 * associated with the vnode. 1937 */ 1938 /* ARGSUSED */ 1939 int 1940 nfs_fsync(vp, fflags, cred, waitfor, p) 1941 register struct vnode *vp; 1942 int fflags; 1943 struct ucred *cred; 1944 int waitfor; 1945 struct proc *p; 1946 { 1947 register struct nfsnode *np = VTONFS(vp); 1948 int error = 0; 1949 1950 if (np->n_flag & NMODIFIED) { 1951 np->n_flag &= ~NMODIFIED; 1952 vflushbuf(vp, waitfor == MNT_WAIT ? B_SYNC : 0); 1953 } 1954 if (!error && (np->n_flag & NWRITEERR)) 1955 error = np->n_error; 1956 return (error); 1957 } 1958 1959 /* 1960 * NFS advisory byte-level locks. 1961 * Currently unsupported. 1962 */ 1963 int 1964 nfs_advlock(vp, id, op, fl, flags) 1965 struct vnode *vp; 1966 caddr_t id; 1967 int op; 1968 struct flock *fl; 1969 int flags; 1970 { 1971 1972 return (EOPNOTSUPP); 1973 } 1974 1975 /* 1976 * Print out the contents of an nfsnode. 1977 */ 1978 int 1979 nfs_print(vp) 1980 struct vnode *vp; 1981 { 1982 register struct nfsnode *np = VTONFS(vp); 1983 1984 printf("tag VT_NFS, fileid %d fsid 0x%x", 1985 np->n_vattr.va_fileid, np->n_vattr.va_fsid); 1986 #ifdef FIFO 1987 if (vp->v_type == VFIFO) 1988 fifo_printinfo(vp); 1989 #endif /* FIFO */ 1990 printf("\n"); 1991 } 1992 1993 /* 1994 * NFS directory offset lookup. 1995 * Currently unsupported. 1996 */ 1997 int 1998 nfs_blkatoff(vp, offset, res, bpp) 1999 struct vnode *vp; 2000 off_t offset; 2001 char **res; 2002 struct buf **bpp; 2003 { 2004 2005 return (EOPNOTSUPP); 2006 } 2007 2008 /* 2009 * NFS flat namespace lookup. 2010 * Currently unsupported. 2011 */ 2012 int 2013 nfs_vget(mp, ino, vpp) 2014 struct mount *mp; 2015 ino_t ino; 2016 struct vnode **vpp; 2017 { 2018 2019 return (EOPNOTSUPP); 2020 } 2021 2022 /* 2023 * NFS flat namespace allocation. 2024 * Currently unsupported. 2025 */ 2026 int 2027 nfs_valloc(pvp, mode, cred, vpp) 2028 struct vnode *pvp; 2029 int mode; 2030 struct ucred *cred; 2031 struct vnode **vpp; 2032 { 2033 2034 return (EOPNOTSUPP); 2035 } 2036 2037 /* 2038 * NFS flat namespace free. 2039 * Currently unsupported. 2040 */ 2041 void 2042 nfs_vfree(pvp, ino, mode) 2043 struct vnode *pvp; 2044 ino_t ino; 2045 int mode; 2046 { 2047 2048 return; 2049 } 2050 2051 /* 2052 * NFS file truncation. 2053 */ 2054 int 2055 nfs_truncate(vp, length, flags, cred) 2056 struct vnode *vp; 2057 off_t length; 2058 int flags; 2059 struct ucred *cred; 2060 { 2061 2062 /* Use nfs_setattr */ 2063 printf("nfs_truncate: need to implement!!"); 2064 return (EOPNOTSUPP); 2065 } 2066 2067 /* 2068 * NFS update. 2069 */ 2070 int 2071 nfs_update(vp, ta, tm, waitfor) 2072 struct vnode *vp; 2073 struct timeval *ta; 2074 struct timeval *tm; 2075 int waitfor; 2076 { 2077 2078 /* Use nfs_setattr */ 2079 printf("nfs_update: need to implement!!"); 2080 return (EOPNOTSUPP); 2081 } 2082