nfs_vnops.c revision 9681
1/* 2 * Copyright (c) 1989, 1993 3 * The Regents of the University of California. 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 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#)nfs_vnops.c 8.5 (Berkeley) 2/13/94 37 * $Id: nfs_vnops.c,v 1.21 1995/07/24 12:50:49 dfr Exp $ 38 */ 39 40/* 41 * vnode op calls for Sun NFS version 2 and 3 42 */ 43 44#include <sys/param.h> 45#include <sys/kernel.h> 46#include <sys/systm.h> 47#include <sys/resourcevar.h> 48#include <sys/proc.h> 49#include <sys/mount.h> 50#include <sys/buf.h> 51#include <sys/malloc.h> 52#include <sys/mbuf.h> 53#include <sys/conf.h> 54#include <sys/namei.h> 55#include <sys/vnode.h> 56#include <sys/dirent.h> 57#include <sys/fcntl.h> 58#include <sys/lockf.h> 59#include <ufs/ufs/dir.h> 60 61#include <vm/vm.h> 62#include <vm/vnode_pager.h> 63 64#include <miscfs/specfs/specdev.h> 65#include <miscfs/fifofs/fifo.h> 66 67#include <nfs/rpcv2.h> 68#include <nfs/nfsproto.h> 69#include <nfs/nfs.h> 70#include <nfs/nfsnode.h> 71#include <nfs/nfsmount.h> 72#include <nfs/xdr_subs.h> 73#include <nfs/nfsm_subs.h> 74#include <nfs/nqnfs.h> 75 76#include <net/if.h> 77#include <netinet/in.h> 78#include <netinet/in_var.h> 79 80/* Defs */ 81#define TRUE 1 82#define FALSE 0 83 84/* 85 * Ifdef for FreeBSD-current merged buffer cache. It is unfortunate that these 86 * calls are not in getblk() and brelse() so that they would not be necessary 87 * here. 88 */ 89#ifndef B_VMIO 90#define vfs_busy_pages(bp, f) 91#endif 92 93/* 94 * Global vfs data structures for nfs 95 */ 96int (**nfsv2_vnodeop_p)(); 97struct vnodeopv_entry_desc nfsv2_vnodeop_entries[] = { 98 { &vop_default_desc, vn_default_error }, 99 { &vop_lookup_desc, nfs_lookup }, /* lookup */ 100 { &vop_create_desc, nfs_create }, /* create */ 101 { &vop_mknod_desc, nfs_mknod }, /* mknod */ 102 { &vop_open_desc, nfs_open }, /* open */ 103 { &vop_close_desc, nfs_close }, /* close */ 104 { &vop_access_desc, nfs_access }, /* access */ 105 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 106 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 107 { &vop_read_desc, nfs_read }, /* read */ 108 { &vop_write_desc, nfs_write }, /* write */ 109#ifdef HAS_VOPLEASE 110 { &vop_lease_desc, nfs_lease_check }, /* lease */ 111#endif 112 { &vop_ioctl_desc, nfs_ioctl }, /* ioctl */ 113 { &vop_select_desc, nfs_select }, /* select */ 114#ifdef HAS_VOPREVOKE 115 { &vop_revoke_desc, nfs_revoke }, /* revoke */ 116#endif 117 { &vop_mmap_desc, nfs_mmap }, /* mmap */ 118 { &vop_fsync_desc, nfs_fsync }, /* fsync */ 119 { &vop_seek_desc, nfs_seek }, /* seek */ 120 { &vop_remove_desc, nfs_remove }, /* remove */ 121 { &vop_link_desc, nfs_link }, /* link */ 122 { &vop_rename_desc, nfs_rename }, /* rename */ 123 { &vop_mkdir_desc, nfs_mkdir }, /* mkdir */ 124 { &vop_rmdir_desc, nfs_rmdir }, /* rmdir */ 125 { &vop_symlink_desc, nfs_symlink }, /* symlink */ 126 { &vop_readdir_desc, nfs_readdir }, /* readdir */ 127 { &vop_readlink_desc, nfs_readlink }, /* readlink */ 128 { &vop_abortop_desc, nfs_abortop }, /* abortop */ 129 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 130 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 131 { &vop_lock_desc, nfs_lock }, /* lock */ 132 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 133 { &vop_bmap_desc, nfs_bmap }, /* bmap */ 134 { &vop_strategy_desc, nfs_strategy }, /* strategy */ 135 { &vop_print_desc, nfs_print }, /* print */ 136 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 137 { &vop_pathconf_desc, nfs_pathconf }, /* pathconf */ 138 { &vop_advlock_desc, nfs_advlock }, /* advlock */ 139 { &vop_blkatoff_desc, nfs_blkatoff }, /* blkatoff */ 140 { &vop_valloc_desc, nfs_valloc }, /* valloc */ 141 { &vop_reallocblks_desc, nfs_reallocblks }, /* reallocblks */ 142 { &vop_vfree_desc, nfs_vfree }, /* vfree */ 143 { &vop_truncate_desc, nfs_truncate }, /* truncate */ 144 { &vop_update_desc, nfs_update }, /* update */ 145 { &vop_bwrite_desc, nfs_bwrite }, 146 { (struct vnodeop_desc*)NULL, (int(*)())NULL } 147}; 148struct vnodeopv_desc nfsv2_vnodeop_opv_desc = 149 { &nfsv2_vnodeop_p, nfsv2_vnodeop_entries }; 150#ifdef __FreeBSD__ 151VNODEOP_SET(nfsv2_vnodeop_opv_desc); 152#endif 153 154/* 155 * Special device vnode ops 156 */ 157int (**spec_nfsv2nodeop_p)(); 158struct vnodeopv_entry_desc spec_nfsv2nodeop_entries[] = { 159 { &vop_default_desc, vn_default_error }, 160 { &vop_lookup_desc, spec_lookup }, /* lookup */ 161 { &vop_create_desc, spec_create }, /* create */ 162 { &vop_mknod_desc, spec_mknod }, /* mknod */ 163 { &vop_open_desc, spec_open }, /* open */ 164 { &vop_close_desc, nfsspec_close }, /* close */ 165 { &vop_access_desc, nfsspec_access }, /* access */ 166 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 167 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 168 { &vop_read_desc, nfsspec_read }, /* read */ 169 { &vop_write_desc, nfsspec_write }, /* write */ 170#ifdef HAS_VOPLEASE 171 { &vop_lease_desc, spec_lease_check }, /* lease */ 172#endif 173 { &vop_ioctl_desc, spec_ioctl }, /* ioctl */ 174 { &vop_select_desc, spec_select }, /* select */ 175#ifdef HAS_VOPREVOKE 176 { &vop_revoke_desc, spec_revoke }, /* revoke */ 177#endif 178 { &vop_mmap_desc, spec_mmap }, /* mmap */ 179 { &vop_fsync_desc, nfs_fsync }, /* fsync */ 180 { &vop_seek_desc, spec_seek }, /* seek */ 181 { &vop_remove_desc, spec_remove }, /* remove */ 182 { &vop_link_desc, spec_link }, /* link */ 183 { &vop_rename_desc, spec_rename }, /* rename */ 184 { &vop_mkdir_desc, spec_mkdir }, /* mkdir */ 185 { &vop_rmdir_desc, spec_rmdir }, /* rmdir */ 186 { &vop_symlink_desc, spec_symlink }, /* symlink */ 187 { &vop_readdir_desc, spec_readdir }, /* readdir */ 188 { &vop_readlink_desc, spec_readlink }, /* readlink */ 189 { &vop_abortop_desc, spec_abortop }, /* abortop */ 190 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 191 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 192 { &vop_lock_desc, nfs_lock }, /* lock */ 193 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 194 { &vop_bmap_desc, spec_bmap }, /* bmap */ 195 { &vop_strategy_desc, spec_strategy }, /* strategy */ 196 { &vop_print_desc, nfs_print }, /* print */ 197 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 198 { &vop_pathconf_desc, spec_pathconf }, /* pathconf */ 199 { &vop_advlock_desc, spec_advlock }, /* advlock */ 200 { &vop_blkatoff_desc, spec_blkatoff }, /* blkatoff */ 201 { &vop_valloc_desc, spec_valloc }, /* valloc */ 202 { &vop_reallocblks_desc, spec_reallocblks }, /* reallocblks */ 203 { &vop_vfree_desc, spec_vfree }, /* vfree */ 204 { &vop_truncate_desc, spec_truncate }, /* truncate */ 205 { &vop_update_desc, nfs_update }, /* update */ 206 { &vop_bwrite_desc, vn_bwrite }, 207 { (struct vnodeop_desc*)NULL, (int(*)())NULL } 208}; 209struct vnodeopv_desc spec_nfsv2nodeop_opv_desc = 210 { &spec_nfsv2nodeop_p, spec_nfsv2nodeop_entries }; 211#ifdef __FreeBSD__ 212VNODEOP_SET(spec_nfsv2nodeop_opv_desc); 213#endif 214 215int (**fifo_nfsv2nodeop_p)(); 216struct vnodeopv_entry_desc fifo_nfsv2nodeop_entries[] = { 217 { &vop_default_desc, vn_default_error }, 218 { &vop_lookup_desc, fifo_lookup }, /* lookup */ 219 { &vop_create_desc, fifo_create }, /* create */ 220 { &vop_mknod_desc, fifo_mknod }, /* mknod */ 221 { &vop_open_desc, fifo_open }, /* open */ 222 { &vop_close_desc, nfsfifo_close }, /* close */ 223 { &vop_access_desc, nfsspec_access }, /* access */ 224 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 225 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 226 { &vop_read_desc, nfsfifo_read }, /* read */ 227 { &vop_write_desc, nfsfifo_write }, /* write */ 228#ifdef HAS_VOPLEASE 229 { &vop_lease_desc, fifo_lease_check }, /* lease */ 230#endif 231 { &vop_ioctl_desc, fifo_ioctl }, /* ioctl */ 232 { &vop_select_desc, fifo_select }, /* select */ 233#ifdef HAS_VOPREVOKE 234 { &vop_revoke_desc, fifo_revoke }, /* revoke */ 235#endif 236 { &vop_mmap_desc, fifo_mmap }, /* mmap */ 237 { &vop_fsync_desc, nfs_fsync }, /* fsync */ 238 { &vop_seek_desc, fifo_seek }, /* seek */ 239 { &vop_remove_desc, fifo_remove }, /* remove */ 240 { &vop_link_desc, fifo_link }, /* link */ 241 { &vop_rename_desc, fifo_rename }, /* rename */ 242 { &vop_mkdir_desc, fifo_mkdir }, /* mkdir */ 243 { &vop_rmdir_desc, fifo_rmdir }, /* rmdir */ 244 { &vop_symlink_desc, fifo_symlink }, /* symlink */ 245 { &vop_readdir_desc, fifo_readdir }, /* readdir */ 246 { &vop_readlink_desc, fifo_readlink }, /* readlink */ 247 { &vop_abortop_desc, fifo_abortop }, /* abortop */ 248 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 249 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 250 { &vop_lock_desc, nfs_lock }, /* lock */ 251 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 252 { &vop_bmap_desc, fifo_bmap }, /* bmap */ 253 { &vop_strategy_desc, fifo_badop }, /* strategy */ 254 { &vop_print_desc, nfs_print }, /* print */ 255 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 256 { &vop_pathconf_desc, fifo_pathconf }, /* pathconf */ 257 { &vop_advlock_desc, fifo_advlock }, /* advlock */ 258 { &vop_blkatoff_desc, fifo_blkatoff }, /* blkatoff */ 259 { &vop_valloc_desc, fifo_valloc }, /* valloc */ 260 { &vop_reallocblks_desc, fifo_reallocblks }, /* reallocblks */ 261 { &vop_vfree_desc, fifo_vfree }, /* vfree */ 262 { &vop_truncate_desc, fifo_truncate }, /* truncate */ 263 { &vop_update_desc, nfs_update }, /* update */ 264 { &vop_bwrite_desc, vn_bwrite }, 265 { (struct vnodeop_desc*)NULL, (int(*)())NULL } 266}; 267struct vnodeopv_desc fifo_nfsv2nodeop_opv_desc = 268 { &fifo_nfsv2nodeop_p, fifo_nfsv2nodeop_entries }; 269#ifdef __FreeBSD__ 270VNODEOP_SET(fifo_nfsv2nodeop_opv_desc); 271#endif 272 273void nqnfs_clientlease(); 274int nfs_commit(); 275int nfs_removerpc(); 276int nfs_renamerpc(); 277 278/* 279 * Global variables 280 */ 281extern u_long nfs_true, nfs_false; 282extern struct nfsstats nfsstats; 283extern nfstype nfsv3_type[9]; 284struct proc *nfs_iodwant[NFS_MAXASYNCDAEMON]; 285int nfs_numasync = 0; 286#define DIRHDSIZ (sizeof (struct dirent) - (MAXNAMLEN + 1)) 287 288/* 289 * nfs null call from vfs. 290 */ 291int 292nfs_null(vp, cred, procp) 293 struct vnode *vp; 294 struct ucred *cred; 295 struct proc *procp; 296{ 297 caddr_t bpos, dpos; 298 int error = 0; 299 struct mbuf *mreq, *mrep, *md, *mb; 300 301 nfsm_reqhead(vp, NFSPROC_NULL, 0); 302 nfsm_request(vp, NFSPROC_NULL, procp, cred); 303 nfsm_reqdone; 304 return (error); 305} 306 307/* 308 * nfs access vnode op. 309 * For nfs version 2, just return ok. File accesses may fail later. 310 * For nfs version 3, use the access rpc to check accessibility. If file modes 311 * are changed on the server, accesses might still fail later. 312 */ 313int 314nfs_access(ap) 315 struct vop_access_args /* { 316 struct vnode *a_vp; 317 int a_mode; 318 struct ucred *a_cred; 319 struct proc *a_p; 320 } */ *ap; 321{ 322 register struct vnode *vp = ap->a_vp; 323 register u_long *tl; 324 register caddr_t cp; 325 register int t1, t2; 326 caddr_t bpos, dpos, cp2; 327 int error = 0, attrflag; 328 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 329 u_long mode, rmode; 330 int v3 = NFS_ISV3(vp); 331 332 /* 333 * For nfs v3, do an access rpc, otherwise you are stuck emulating 334 * ufs_access() locally using the vattr. This may not be correct, 335 * since the server may apply other access criteria such as 336 * client uid-->server uid mapping that we do not know about, but 337 * this is better than just returning anything that is lying about 338 * in the cache. 339 */ 340 if (v3) { 341 nfsstats.rpccnt[NFSPROC_ACCESS]++; 342 nfsm_reqhead(vp, NFSPROC_ACCESS, NFSX_FH(v3) + NFSX_UNSIGNED); 343 nfsm_fhtom(vp, v3); 344 nfsm_build(tl, u_long *, NFSX_UNSIGNED); 345 if (ap->a_mode & VREAD) 346 mode = NFSV3ACCESS_READ; 347 else 348 mode = 0; 349 if (vp->v_type == VDIR) { 350 if (ap->a_mode & VWRITE) 351 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | 352 NFSV3ACCESS_DELETE); 353 if (ap->a_mode & VEXEC) 354 mode |= NFSV3ACCESS_LOOKUP; 355 } else { 356 if (ap->a_mode & VWRITE) 357 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND); 358 if (ap->a_mode & VEXEC) 359 mode |= NFSV3ACCESS_EXECUTE; 360 } 361 *tl = txdr_unsigned(mode); 362 nfsm_request(vp, NFSPROC_ACCESS, ap->a_p, ap->a_cred); 363 nfsm_postop_attr(vp, attrflag); 364 if (!error) { 365 nfsm_dissect(tl, u_long *, NFSX_UNSIGNED); 366 rmode = fxdr_unsigned(u_long, *tl); 367 /* 368 * The NFS V3 spec does not clarify whether or not 369 * the returned access bits can be a superset of 370 * the ones requested, so... 371 */ 372 if ((rmode & mode) != mode) 373 error = EACCES; 374 } 375 nfsm_reqdone; 376 return (error); 377 } else 378 return (nfsspec_access(ap)); 379} 380 381/* 382 * nfs open vnode op 383 * Check to see if the type is ok 384 * and that deletion is not in progress. 385 * For paged in text files, you will need to flush the page cache 386 * if consistency is lost. 387 */ 388/* ARGSUSED */ 389int 390nfs_open(ap) 391 struct vop_open_args /* { 392 struct vnode *a_vp; 393 int a_mode; 394 struct ucred *a_cred; 395 struct proc *a_p; 396 } */ *ap; 397{ 398 register struct vnode *vp = ap->a_vp; 399 struct nfsnode *np = VTONFS(vp); 400 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 401 struct vattr vattr; 402 int error; 403 404 if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK) 405{ printf("open eacces vtyp=%d\n",vp->v_type); 406 return (EACCES); 407} 408 /* 409 * Get a valid lease. If cached data is stale, flush it. 410 */ 411 if (nmp->nm_flag & NFSMNT_NQNFS) { 412 if (NQNFS_CKINVALID(vp, np, ND_READ)) { 413 do { 414 error = nqnfs_getlease(vp, ND_READ, ap->a_cred, 415 ap->a_p); 416 } while (error == NQNFS_EXPIRED); 417 if (error) 418 return (error); 419 if (np->n_lrev != np->n_brev || 420 (np->n_flag & NQNFSNONCACHE)) { 421 if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 422 ap->a_p, 1)) == EINTR) 423 return (error); 424 (void) vnode_pager_uncache(vp); 425 np->n_brev = np->n_lrev; 426 } 427 } 428 } else { 429 if (np->n_flag & NMODIFIED) { 430 if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 431 ap->a_p, 1)) == EINTR) 432 return (error); 433 /* (void) vnode_pager_uncache(vp); */ 434 np->n_attrstamp = 0; 435 if (vp->v_type == VDIR) 436 np->n_direofoffset = 0; 437 error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_p); 438 if (error) 439 return (error); 440 np->n_mtime = vattr.va_mtime.ts_sec; 441 } else { 442 error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_p); 443 if (error) 444 return (error); 445 if (np->n_mtime != vattr.va_mtime.ts_sec) { 446 if (vp->v_type == VDIR) 447 np->n_direofoffset = 0; 448 if ((error = nfs_vinvalbuf(vp, V_SAVE, 449 ap->a_cred, ap->a_p, 1)) == EINTR) 450 return (error); 451 /* (void) vnode_pager_uncache(vp); */ 452 np->n_mtime = vattr.va_mtime.ts_sec; 453 } 454 } 455 } 456 if ((nmp->nm_flag & NFSMNT_NQNFS) == 0) 457 np->n_attrstamp = 0; /* For Open/Close consistency */ 458 return (0); 459} 460 461/* 462 * nfs close vnode op 463 * What an NFS client should do upon close after writing is a debatable issue. 464 * Most NFS clients push delayed writes to the server upon close, basically for 465 * two reasons: 466 * 1 - So that any write errors may be reported back to the client process 467 * doing the close system call. By far the two most likely errors are 468 * NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure. 469 * 2 - To put a worst case upper bound on cache inconsistency between 470 * multiple clients for the file. 471 * There is also a consistency problem for Version 2 of the protocol w.r.t. 472 * not being able to tell if other clients are writing a file concurrently, 473 * since there is no way of knowing if the changed modify time in the reply 474 * is only due to the write for this client. 475 * (NFS Version 3 provides weak cache consistency data in the reply that 476 * should be sufficient to detect and handle this case.) 477 * 478 * The current code does the following: 479 * for NFS Version 2 - play it safe and flush/invalidate all dirty buffers 480 * for NFS Version 3 - flush dirty buffers to the server but don't invalidate 481 * or commit them (this satisfies 1 and 2 except for the 482 * case where the server crashes after this close but 483 * before the commit RPC, which is felt to be "good 484 * enough". Changing the last argument to nfs_flush() to 485 * a 1 would force a commit operation, if it is felt a 486 * commit is necessary now. 487 * for NQNFS - do nothing now, since 2 is dealt with via leases and 488 * 1 should be dealt with via an fsync() system call for 489 * cases where write errors are important. 490 */ 491/* ARGSUSED */ 492int 493nfs_close(ap) 494 struct vop_close_args /* { 495 struct vnodeop_desc *a_desc; 496 struct vnode *a_vp; 497 int a_fflag; 498 struct ucred *a_cred; 499 struct proc *a_p; 500 } */ *ap; 501{ 502 register struct vnode *vp = ap->a_vp; 503 register struct nfsnode *np = VTONFS(vp); 504 int error = 0; 505 506 if (vp->v_type == VREG) { 507 if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS) == 0 && 508 (np->n_flag & NMODIFIED)) { 509 if (NFS_ISV3(vp)) { 510 error = nfs_flush(vp, ap->a_cred, MNT_WAIT, ap->a_p, 0); 511 np->n_flag &= ~NMODIFIED; 512 } else 513 error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, ap->a_p, 1); 514 np->n_attrstamp = 0; 515 } 516 if (np->n_flag & NWRITEERR) { 517 np->n_flag &= ~NWRITEERR; 518 error = np->n_error; 519 } 520 } 521 return (error); 522} 523 524/* 525 * nfs getattr call from vfs. 526 */ 527int 528nfs_getattr(ap) 529 struct vop_getattr_args /* { 530 struct vnode *a_vp; 531 struct vattr *a_vap; 532 struct ucred *a_cred; 533 struct proc *a_p; 534 } */ *ap; 535{ 536 register struct vnode *vp = ap->a_vp; 537 register struct nfsnode *np = VTONFS(vp); 538 register caddr_t cp; 539 register u_long *tl; 540 register int t1, t2; 541 caddr_t bpos, dpos; 542 int error = 0; 543 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 544 int v3 = NFS_ISV3(vp); 545 546 /* 547 * Update local times for special files. 548 */ 549 if (np->n_flag & (NACC | NUPD)) 550 np->n_flag |= NCHG; 551 /* 552 * First look in the cache. 553 */ 554 if (nfs_getattrcache(vp, ap->a_vap) == 0) 555 return (0); 556 nfsstats.rpccnt[NFSPROC_GETATTR]++; 557 nfsm_reqhead(vp, NFSPROC_GETATTR, NFSX_FH(v3)); 558 nfsm_fhtom(vp, v3); 559 nfsm_request(vp, NFSPROC_GETATTR, ap->a_p, ap->a_cred); 560 if (!error) 561 nfsm_loadattr(vp, ap->a_vap); 562 nfsm_reqdone; 563 return (error); 564} 565 566/* 567 * nfs setattr call. 568 */ 569int 570nfs_setattr(ap) 571 struct vop_setattr_args /* { 572 struct vnodeop_desc *a_desc; 573 struct vnode *a_vp; 574 struct vattr *a_vap; 575 struct ucred *a_cred; 576 struct proc *a_p; 577 } */ *ap; 578{ 579 register struct vnode *vp = ap->a_vp; 580 register struct nfsnode *np = VTONFS(vp); 581 register struct vattr *vap = ap->a_vap; 582 int error = 0; 583 u_quad_t tsize; 584 585#ifndef nolint 586 tsize = (u_quad_t)0; 587#endif 588 if (vap->va_size != VNOVAL) { 589 switch (vp->v_type) { 590 case VDIR: 591 return (EISDIR); 592 case VCHR: 593 case VBLK: 594 if (vap->va_mtime.ts_sec == VNOVAL && 595 vap->va_atime.ts_sec == VNOVAL && 596 vap->va_mode == (u_short)VNOVAL && 597 vap->va_uid == (uid_t)VNOVAL && 598 vap->va_gid == (gid_t)VNOVAL) 599 return (0); 600 vap->va_size = VNOVAL; 601 break; 602 default: 603 if (vap->va_size == 0) 604 error = nfs_vinvalbuf(vp, 0, 605 ap->a_cred, ap->a_p, 1); 606 else 607 error = nfs_vinvalbuf(vp, V_SAVE, 608 ap->a_cred, ap->a_p, 1); 609 if (error) 610 return (error); 611 tsize = np->n_size; 612 np->n_size = np->n_vattr.va_size = vap->va_size; 613 vnode_pager_setsize(vp, (u_long)np->n_size); 614 }; 615 } else if ((vap->va_mtime.ts_sec != VNOVAL || 616 vap->va_atime.ts_sec != VNOVAL) && 617 vp->v_type == VREG && 618 (error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 619 ap->a_p, 1)) == EINTR) 620 return (error); 621 error = nfs_setattrrpc(vp, vap, ap->a_cred, ap->a_p); 622 if (error && vap->va_size != VNOVAL) { 623 np->n_size = np->n_vattr.va_size = tsize; 624 vnode_pager_setsize(vp, (u_long)np->n_size); 625 } 626 return (error); 627} 628 629/* 630 * Do an nfs setattr rpc. 631 */ 632int 633nfs_setattrrpc(vp, vap, cred, procp) 634 register struct vnode *vp; 635 register struct vattr *vap; 636 struct ucred *cred; 637 struct proc *procp; 638{ 639 register struct nfsv2_sattr *sp; 640 register caddr_t cp; 641 register long t1, t2; 642 caddr_t bpos, dpos, cp2; 643 u_long *tl; 644 int error = 0, wccflag = NFSV3_WCCRATTR; 645 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 646 u_quad_t frev; 647 int v3 = NFS_ISV3(vp); 648 649 nfsstats.rpccnt[NFSPROC_SETATTR]++; 650 nfsm_reqhead(vp, NFSPROC_SETATTR, NFSX_FH(v3) + NFSX_SATTR(v3)); 651 nfsm_fhtom(vp, v3); 652 if (v3) { 653 if (vap->va_mode != (u_short)VNOVAL) { 654 nfsm_build(tl, u_long *, 2 * NFSX_UNSIGNED); 655 *tl++ = nfs_true; 656 *tl = txdr_unsigned(vap->va_mode); 657 } else { 658 nfsm_build(tl, u_long *, NFSX_UNSIGNED); 659 *tl = nfs_false; 660 } 661 if (vap->va_uid != (uid_t)VNOVAL) { 662 nfsm_build(tl, u_long *, 2 * NFSX_UNSIGNED); 663 *tl++ = nfs_true; 664 *tl = txdr_unsigned(vap->va_uid); 665 } else { 666 nfsm_build(tl, u_long *, NFSX_UNSIGNED); 667 *tl = nfs_false; 668 } 669 if (vap->va_gid != (gid_t)VNOVAL) { 670 nfsm_build(tl, u_long *, 2 * NFSX_UNSIGNED); 671 *tl++ = nfs_true; 672 *tl = txdr_unsigned(vap->va_gid); 673 } else { 674 nfsm_build(tl, u_long *, NFSX_UNSIGNED); 675 *tl = nfs_false; 676 } 677 if (vap->va_size != VNOVAL) { 678 nfsm_build(tl, u_long *, 3 * NFSX_UNSIGNED); 679 *tl++ = nfs_true; 680 txdr_hyper(&vap->va_size, tl); 681 } else { 682 nfsm_build(tl, u_long *, NFSX_UNSIGNED); 683 *tl = nfs_false; 684 } 685 if (vap->va_atime.ts_sec != VNOVAL) { 686 if (vap->va_atime.ts_sec != time.tv_sec) { 687 nfsm_build(tl, u_long *, 3 * NFSX_UNSIGNED); 688 *tl++ = txdr_unsigned(NFSV3SATTRTIME_TOCLIENT); 689 txdr_nfsv3time(&vap->va_atime, tl); 690 } else { 691 nfsm_build(tl, u_long *, NFSX_UNSIGNED); 692 *tl = txdr_unsigned(NFSV3SATTRTIME_TOSERVER); 693 } 694 } else { 695 nfsm_build(tl, u_long *, NFSX_UNSIGNED); 696 *tl = txdr_unsigned(NFSV3SATTRTIME_DONTCHANGE); 697 } 698 if (vap->va_mtime.ts_sec != VNOVAL) { 699 if (vap->va_mtime.ts_sec != time.tv_sec) { 700 nfsm_build(tl, u_long *, 3 * NFSX_UNSIGNED); 701 *tl++ = txdr_unsigned(NFSV3SATTRTIME_TOCLIENT); 702 txdr_nfsv3time(&vap->va_atime, tl); 703 } else { 704 nfsm_build(tl, u_long *, NFSX_UNSIGNED); 705 *tl = txdr_unsigned(NFSV3SATTRTIME_TOSERVER); 706 } 707 } else { 708 nfsm_build(tl, u_long *, NFSX_UNSIGNED); 709 *tl = txdr_unsigned(NFSV3SATTRTIME_DONTCHANGE); 710 } 711 nfsm_build(tl, u_long *, NFSX_UNSIGNED); 712 *tl = nfs_false; 713 } else { 714 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 715 if (vap->va_mode == (u_short)VNOVAL) 716 sp->sa_mode = VNOVAL; 717 else 718 sp->sa_mode = vtonfsv2_mode(vp->v_type, vap->va_mode); 719 if (vap->va_uid == (uid_t)VNOVAL) 720 sp->sa_uid = VNOVAL; 721 else 722 sp->sa_uid = txdr_unsigned(vap->va_uid); 723 if (vap->va_gid == (gid_t)VNOVAL) 724 sp->sa_gid = VNOVAL; 725 else 726 sp->sa_gid = txdr_unsigned(vap->va_gid); 727 sp->sa_size = txdr_unsigned(vap->va_size); 728 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 729 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 730 } 731 nfsm_request(vp, NFSPROC_SETATTR, procp, cred); 732 if (v3) { 733 nfsm_wcc_data(vp, wccflag); 734 } else 735 nfsm_loadattr(vp, (struct vattr *)0); 736 nfsm_reqdone; 737 return (error); 738} 739 740/* 741 * nfs lookup call, one step at a time... 742 * First look in cache 743 * If not found, unlock the directory nfsnode and do the rpc 744 */ 745int 746nfs_lookup(ap) 747 struct vop_lookup_args /* { 748 struct vnodeop_desc *a_desc; 749 struct vnode *a_dvp; 750 struct vnode **a_vpp; 751 struct componentname *a_cnp; 752 } */ *ap; 753{ 754 register struct componentname *cnp = ap->a_cnp; 755 register struct vnode *dvp = ap->a_dvp; 756 register struct vnode **vpp = ap->a_vpp; 757 register int flags = cnp->cn_flags; 758 register struct vnode *newvp; 759 register u_long *tl; 760 register caddr_t cp; 761 register long t1, t2; 762 struct nfsmount *nmp; 763 caddr_t bpos, dpos, cp2; 764 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 765 long len; 766 nfsfh_t *fhp; 767 struct nfsnode *np; 768 int lockparent, wantparent, error = 0, attrflag, fhsize; 769 int v3 = NFS_ISV3(dvp); 770 771 *vpp = NULLVP; 772 if (dvp->v_type != VDIR) 773 return (ENOTDIR); 774 lockparent = flags & LOCKPARENT; 775 wantparent = flags & (LOCKPARENT|WANTPARENT); 776 nmp = VFSTONFS(dvp->v_mount); 777 np = VTONFS(dvp); 778 if ((error = cache_lookup(dvp, vpp, cnp)) && error != ENOENT) { 779 struct vattr vattr; 780 int vpid; 781 782 newvp = *vpp; 783 vpid = newvp->v_id; 784 /* 785 * See the comment starting `Step through' in ufs/ufs_lookup.c 786 * for an explanation of the locking protocol 787 */ 788 if (dvp == newvp) { 789 VREF(newvp); 790 error = 0; 791 } else if (flags & ISDOTDOT) { 792 VOP_UNLOCK(dvp); 793 error = vget(newvp, 1); 794 if (!error && lockparent && (flags & ISLASTCN)) 795 error = VOP_LOCK(dvp); 796 } else { 797 error = vget(newvp, 1); 798 if (!lockparent || error || !(flags & ISLASTCN)) 799 VOP_UNLOCK(dvp); 800 } 801 if (!error) { 802 if (vpid == newvp->v_id) { 803 if (!VOP_GETATTR(newvp, &vattr, cnp->cn_cred, cnp->cn_proc) 804 && vattr.va_ctime.ts_sec == VTONFS(newvp)->n_ctime) { 805 nfsstats.lookupcache_hits++; 806 if (cnp->cn_nameiop != LOOKUP && 807 (flags & ISLASTCN)) 808 cnp->cn_flags |= SAVENAME; 809 return (0); 810 } 811 cache_purge(newvp); 812 } 813 vput(newvp); 814 if (lockparent && dvp != newvp && (flags & ISLASTCN)) 815 VOP_UNLOCK(dvp); 816 } 817 error = VOP_LOCK(dvp); 818 if (error) 819 return (error); 820 *vpp = NULLVP; 821 } 822 error = 0; 823 newvp = NULLVP; 824 nfsstats.lookupcache_misses++; 825 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 826 len = cnp->cn_namelen; 827 nfsm_reqhead(dvp, NFSPROC_LOOKUP, 828 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 829 nfsm_fhtom(dvp, v3); 830 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 831 nfsm_request(dvp, NFSPROC_LOOKUP, cnp->cn_proc, cnp->cn_cred); 832 if (error) { 833 nfsm_postop_attr(dvp, attrflag); 834 m_freem(mrep); 835 goto nfsmout; 836 } 837 nfsm_getfh(fhp, fhsize, v3); 838 839 /* 840 * Handle RENAME case... 841 */ 842 if (cnp->cn_nameiop == RENAME && wantparent && (flags & ISLASTCN)) { 843 if (NFS_CMPFH(np, fhp, fhsize)) { 844 m_freem(mrep); 845 return (EISDIR); 846 } 847 if (error = nfs_nget(dvp->v_mount, fhp, fhsize, &np)) { 848 m_freem(mrep); 849 return (error); 850 } 851 newvp = NFSTOV(np); 852 if (v3) { 853 nfsm_postop_attr(newvp, attrflag); 854 nfsm_postop_attr(dvp, attrflag); 855 } else 856 nfsm_loadattr(newvp, (struct vattr *)0); 857 *vpp = newvp; 858 m_freem(mrep); 859 cnp->cn_flags |= SAVENAME; 860 if (!lockparent) 861 VOP_UNLOCK(dvp); 862 return (0); 863 } 864 865 if (flags & ISDOTDOT) { 866 VOP_UNLOCK(dvp); 867 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 868 if (error) { 869 VOP_LOCK(dvp); 870 return (error); 871 } 872 newvp = NFSTOV(np); 873 if (lockparent && (flags & ISLASTCN) && 874 (error = VOP_LOCK(dvp))) { 875 vput(newvp); 876 return (error); 877 } 878 } else if (NFS_CMPFH(np, fhp, fhsize)) { 879 VREF(dvp); 880 newvp = dvp; 881 } else { 882 if (error = nfs_nget(dvp->v_mount, fhp, fhsize, &np)) { 883 m_freem(mrep); 884 return (error); 885 } 886 if (!lockparent || !(flags & ISLASTCN)) 887 VOP_UNLOCK(dvp); 888 newvp = NFSTOV(np); 889 } 890 if (v3) { 891 nfsm_postop_attr(newvp, attrflag); 892 nfsm_postop_attr(dvp, attrflag); 893 } else 894 nfsm_loadattr(newvp, (struct vattr *)0); 895 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 896 cnp->cn_flags |= SAVENAME; 897 if ((cnp->cn_flags & MAKEENTRY) && 898 (cnp->cn_nameiop != DELETE || !(flags & ISLASTCN))) { 899 np->n_ctime = np->n_vattr.va_ctime.ts_sec; 900 cache_enter(dvp, newvp, cnp); 901 } 902 *vpp = newvp; 903 nfsm_reqdone; 904 if (error) { 905 if (newvp != NULLVP) 906 vrele(newvp); 907 if ((cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME) && 908 (flags & ISLASTCN) && error == ENOENT) { 909 if (!lockparent) 910 VOP_UNLOCK(dvp); 911 error = EJUSTRETURN; 912 } 913 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 914 cnp->cn_flags |= SAVENAME; 915 } 916 return (error); 917} 918 919/* 920 * nfs read call. 921 * Just call nfs_bioread() to do the work. 922 */ 923int 924nfs_read(ap) 925 struct vop_read_args /* { 926 struct vnode *a_vp; 927 struct uio *a_uio; 928 int a_ioflag; 929 struct ucred *a_cred; 930 } */ *ap; 931{ 932 register struct vnode *vp = ap->a_vp; 933 934 if (vp->v_type != VREG) 935 return (EPERM); 936 return (nfs_bioread(vp, ap->a_uio, ap->a_ioflag, ap->a_cred)); 937} 938 939/* 940 * nfs readlink call 941 */ 942int 943nfs_readlink(ap) 944 struct vop_readlink_args /* { 945 struct vnode *a_vp; 946 struct uio *a_uio; 947 struct ucred *a_cred; 948 } */ *ap; 949{ 950 register struct vnode *vp = ap->a_vp; 951 952 if (vp->v_type != VLNK) 953 return (EPERM); 954 return (nfs_bioread(vp, ap->a_uio, 0, ap->a_cred)); 955} 956 957/* 958 * Do a readlink rpc. 959 * Called by nfs_doio() from below the buffer cache. 960 */ 961int 962nfs_readlinkrpc(vp, uiop, cred) 963 register struct vnode *vp; 964 struct uio *uiop; 965 struct ucred *cred; 966{ 967 register u_long *tl; 968 register caddr_t cp; 969 register long t1, t2; 970 caddr_t bpos, dpos, cp2; 971 int error = 0, len, attrflag; 972 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 973 int v3 = NFS_ISV3(vp); 974 975 nfsstats.rpccnt[NFSPROC_READLINK]++; 976 nfsm_reqhead(vp, NFSPROC_READLINK, NFSX_FH(v3)); 977 nfsm_fhtom(vp, v3); 978 nfsm_request(vp, NFSPROC_READLINK, uiop->uio_procp, cred); 979 if (v3) 980 nfsm_postop_attr(vp, attrflag); 981 if (!error) { 982 nfsm_strsiz(len, NFS_MAXPATHLEN); 983 nfsm_mtouio(uiop, len); 984 } 985 nfsm_reqdone; 986 return (error); 987} 988 989/* 990 * nfs read rpc call 991 * Ditto above 992 */ 993int 994nfs_readrpc(vp, uiop, cred) 995 register struct vnode *vp; 996 struct uio *uiop; 997 struct ucred *cred; 998{ 999 register u_long *tl; 1000 register caddr_t cp; 1001 register long t1, t2; 1002 caddr_t bpos, dpos, cp2; 1003 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1004 struct nfsmount *nmp; 1005 int error = 0, len, retlen, tsiz, eof, attrflag; 1006 int v3 = NFS_ISV3(vp); 1007 1008#ifndef nolint 1009 eof = 0; 1010#endif 1011 nmp = VFSTONFS(vp->v_mount); 1012 tsiz = uiop->uio_resid; 1013 if (uiop->uio_offset + tsiz > 0xffffffff && !v3) 1014 return (EFBIG); 1015 while (tsiz > 0) { 1016 nfsstats.rpccnt[NFSPROC_READ]++; 1017 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz; 1018 nfsm_reqhead(vp, NFSPROC_READ, NFSX_FH(v3) + NFSX_UNSIGNED * 3); 1019 nfsm_fhtom(vp, v3); 1020 nfsm_build(tl, u_long *, NFSX_UNSIGNED * 3); 1021 if (v3) { 1022 txdr_hyper(&uiop->uio_offset, tl); 1023 *(tl + 2) = txdr_unsigned(len); 1024 } else { 1025 *tl++ = txdr_unsigned(uiop->uio_offset); 1026 *tl++ = txdr_unsigned(len); 1027 *tl = 0; 1028 } 1029 nfsm_request(vp, NFSPROC_READ, uiop->uio_procp, cred); 1030 if (v3) { 1031 nfsm_postop_attr(vp, attrflag); 1032 if (error) { 1033 m_freem(mrep); 1034 goto nfsmout; 1035 } 1036 nfsm_dissect(tl, u_long *, 2 * NFSX_UNSIGNED); 1037 eof = fxdr_unsigned(int, *(tl + 1)); 1038 } else 1039 nfsm_loadattr(vp, (struct vattr *)0); 1040 nfsm_strsiz(retlen, nmp->nm_rsize); 1041 nfsm_mtouio(uiop, retlen); 1042 m_freem(mrep); 1043 tsiz -= retlen; 1044 if (v3) { 1045 if (eof || retlen == 0) 1046 tsiz = 0; 1047 } else if (retlen < len) 1048 tsiz = 0; 1049 } 1050nfsmout: 1051 return (error); 1052} 1053 1054/* 1055 * nfs write call 1056 */ 1057int 1058nfs_writerpc(vp, uiop, cred, iomode, must_commit) 1059 register struct vnode *vp; 1060 register struct uio *uiop; 1061 struct ucred *cred; 1062 int *iomode, *must_commit; 1063{ 1064 register u_long *tl; 1065 register caddr_t cp; 1066 register int t1, t2, backup; 1067 caddr_t bpos, dpos, cp2; 1068 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1069 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1070 struct nfsnode *np = VTONFS(vp); 1071 u_quad_t frev; 1072 int error = 0, len, tsiz, wccflag = NFSV3_WCCRATTR, rlen, commit; 1073 int v3 = NFS_ISV3(vp), committed = NFSV3WRITE_FILESYNC; 1074 1075#ifndef DIAGNOSTIC 1076 if (uiop->uio_iovcnt != 1) 1077 panic("nfs: writerpc iovcnt > 1"); 1078#endif 1079 *must_commit = 0; 1080 tsiz = uiop->uio_resid; 1081 if (uiop->uio_offset + tsiz > 0xffffffff && !v3) 1082 return (EFBIG); 1083 while (tsiz > 0) { 1084 nfsstats.rpccnt[NFSPROC_WRITE]++; 1085 len = (tsiz > nmp->nm_wsize) ? nmp->nm_wsize : tsiz; 1086 nfsm_reqhead(vp, NFSPROC_WRITE, 1087 NFSX_FH(v3) + 5 * NFSX_UNSIGNED + nfsm_rndup(len)); 1088 nfsm_fhtom(vp, v3); 1089 if (v3) { 1090 nfsm_build(tl, u_long *, 5 * NFSX_UNSIGNED); 1091 txdr_hyper(&uiop->uio_offset, tl); 1092 tl += 2; 1093 *tl++ = txdr_unsigned(len); 1094 *tl++ = txdr_unsigned(*iomode); 1095 } else { 1096 nfsm_build(tl, u_long *, 4 * NFSX_UNSIGNED); 1097 *++tl = txdr_unsigned(uiop->uio_offset); 1098 tl += 2; 1099 } 1100 *tl = txdr_unsigned(len); 1101 nfsm_uiotom(uiop, len); 1102 nfsm_request(vp, NFSPROC_WRITE, uiop->uio_procp, cred); 1103 if (v3) { 1104 wccflag = NFSV3_WCCCHK; 1105 nfsm_wcc_data(vp, wccflag); 1106 if (!error) { 1107 nfsm_dissect(tl, u_long *, 2 * NFSX_UNSIGNED + 1108 NFSX_V3WRITEVERF); 1109 rlen = fxdr_unsigned(int, *tl++); 1110 if (rlen == 0) { 1111 error = NFSERR_IO; 1112 break; 1113 } else if (rlen < len) { 1114 backup = len - rlen; 1115 uiop->uio_iov->iov_base -= backup; 1116 uiop->uio_iov->iov_len += backup; 1117 uiop->uio_offset -= backup; 1118 uiop->uio_resid += backup; 1119 len = rlen; 1120 } 1121 commit = fxdr_unsigned(int, *tl++); 1122 1123 /* 1124 * Return the lowest committment level 1125 * obtained by any of the RPCs. 1126 */ 1127 if (committed == NFSV3WRITE_FILESYNC) 1128 committed = commit; 1129 else if (committed == NFSV3WRITE_DATASYNC && 1130 commit == NFSV3WRITE_UNSTABLE) 1131 committed = commit; 1132 if ((nmp->nm_flag & NFSMNT_HASWRITEVERF) == 0) { 1133 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf, 1134 NFSX_V3WRITEVERF); 1135 nmp->nm_flag |= NFSMNT_HASWRITEVERF; 1136 } else if (bcmp((caddr_t)tl, 1137 (caddr_t)nmp->nm_verf, NFSX_V3WRITEVERF)) { 1138 *must_commit = 1; 1139 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf, 1140 NFSX_V3WRITEVERF); 1141 } 1142 } 1143 } else 1144 nfsm_loadattr(vp, (struct vattr *)0); 1145 if (wccflag) 1146 VTONFS(vp)->n_mtime = VTONFS(vp)->n_vattr.va_mtime.ts_sec; 1147 m_freem(mrep); 1148 tsiz -= len; 1149 } 1150nfsmout: 1151 *iomode = committed; 1152 if (error) 1153 uiop->uio_resid = tsiz; 1154 return (error); 1155} 1156 1157/* 1158 * nfs mknod rpc 1159 * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the 1160 * mode set to specify the file type and the size field for rdev. 1161 */ 1162int 1163nfs_mknodrpc(dvp, vpp, cnp, vap) 1164 register struct vnode *dvp; 1165 register struct vnode **vpp; 1166 register struct componentname *cnp; 1167 register struct vattr *vap; 1168{ 1169 register struct nfsv2_sattr *sp; 1170 register struct nfsv3_sattr *sp3; 1171 register u_long *tl; 1172 register caddr_t cp; 1173 register long t1, t2; 1174 struct vnode *newvp = (struct vnode *)0; 1175 struct nfsnode *np = (struct nfsnode *)0; 1176 struct vattr vattr; 1177 char *cp2; 1178 caddr_t bpos, dpos; 1179 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0; 1180 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1181 u_long rdev; 1182 int v3 = NFS_ISV3(dvp); 1183 1184 if (vap->va_type == VCHR || vap->va_type == VBLK) 1185 rdev = txdr_unsigned(vap->va_rdev); 1186 else if (vap->va_type == VFIFO || vap->va_type == VSOCK) 1187 rdev = 0xffffffff; 1188 else { 1189 VOP_ABORTOP(dvp, cnp); 1190 vput(dvp); 1191 return (EOPNOTSUPP); 1192 } 1193 if (error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred, cnp->cn_proc)) { 1194 VOP_ABORTOP(dvp, cnp); 1195 vput(dvp); 1196 return (error); 1197 } 1198 nfsstats.rpccnt[NFSPROC_MKNOD]++; 1199 nfsm_reqhead(dvp, NFSPROC_MKNOD, NFSX_FH(v3) + 4 * NFSX_UNSIGNED + 1200 + nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1201 nfsm_fhtom(dvp, v3); 1202 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1203 if (v3) { 1204 nfsm_build(tl, u_long *, NFSX_UNSIGNED + NFSX_V3SRVSATTR); 1205 *tl++ = vtonfsv3_type(vap->va_type); 1206 sp3 = (struct nfsv3_sattr *)tl; 1207 nfsm_v3sattr(sp3, vap, cnp->cn_cred->cr_uid, vattr.va_gid); 1208 if (vap->va_type == VCHR || vap->va_type == VBLK) { 1209 nfsm_build(tl, u_long *, 2 * NFSX_UNSIGNED); 1210 *tl++ = txdr_unsigned(major(vap->va_rdev)); 1211 *tl = txdr_unsigned(minor(vap->va_rdev)); 1212 } 1213 } else { 1214 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1215 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1216 sp->sa_uid = txdr_unsigned(cnp->cn_cred->cr_uid); 1217 sp->sa_gid = txdr_unsigned(vattr.va_gid); 1218 sp->sa_size = rdev; 1219 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1220 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1221 } 1222 nfsm_request(dvp, NFSPROC_MKNOD, cnp->cn_proc, cnp->cn_cred); 1223 if (!error) { 1224 nfsm_mtofh(dvp, newvp, v3, gotvp); 1225 if (!gotvp) { 1226 if (newvp) { 1227 vput(newvp); 1228 newvp = (struct vnode *)0; 1229 } 1230 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1231 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np); 1232 if (!error) 1233 newvp = NFSTOV(np); 1234 } 1235 } 1236 if (v3) 1237 nfsm_wcc_data(dvp, wccflag); 1238 nfsm_reqdone; 1239 if (error) { 1240 if (newvp) 1241 vput(newvp); 1242 } else { 1243 if (cnp->cn_flags & MAKEENTRY) 1244 cache_enter(dvp, newvp, cnp); 1245 *vpp = newvp; 1246 } 1247 FREE(cnp->cn_pnbuf, M_NAMEI); 1248 VTONFS(dvp)->n_flag |= NMODIFIED; 1249 if (!wccflag) 1250 VTONFS(dvp)->n_attrstamp = 0; 1251 vput(dvp); 1252 return (error); 1253} 1254 1255/* 1256 * nfs mknod vop 1257 * just call nfs_mknodrpc() to do the work. 1258 */ 1259/* ARGSUSED */ 1260int 1261nfs_mknod(ap) 1262 struct vop_mknod_args /* { 1263 struct vnode *a_dvp; 1264 struct vnode **a_vpp; 1265 struct componentname *a_cnp; 1266 struct vattr *a_vap; 1267 } */ *ap; 1268{ 1269 struct vnode *newvp; 1270 int error; 1271 1272 error = nfs_mknodrpc(ap->a_dvp, &newvp, ap->a_cnp, ap->a_vap); 1273 if (!error) 1274 vput(newvp); 1275 return (error); 1276} 1277 1278static u_long create_verf; 1279/* 1280 * nfs file create call 1281 */ 1282int 1283nfs_create(ap) 1284 struct vop_create_args /* { 1285 struct vnode *a_dvp; 1286 struct vnode **a_vpp; 1287 struct componentname *a_cnp; 1288 struct vattr *a_vap; 1289 } */ *ap; 1290{ 1291 register struct vnode *dvp = ap->a_dvp; 1292 register struct vattr *vap = ap->a_vap; 1293 register struct componentname *cnp = ap->a_cnp; 1294 register struct nfsv2_sattr *sp; 1295 register struct nfsv3_sattr *sp3; 1296 register u_long *tl; 1297 register caddr_t cp; 1298 register long t1, t2; 1299 struct nfsnode *np = (struct nfsnode *)0; 1300 struct vnode *newvp = (struct vnode *)0; 1301 caddr_t bpos, dpos, cp2; 1302 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0, fmode = 0; 1303 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1304 struct vattr vattr; 1305 int v3 = NFS_ISV3(dvp); 1306 1307 /* 1308 * Oops, not for me.. 1309 */ 1310 if (vap->va_type == VSOCK) 1311 return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap)); 1312 1313 if (error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred, cnp->cn_proc)) { 1314 VOP_ABORTOP(dvp, cnp); 1315 vput(dvp); 1316 return (error); 1317 } 1318 if (vap->va_vaflags & VA_EXCLUSIVE) 1319 fmode |= O_EXCL; 1320again: 1321 nfsstats.rpccnt[NFSPROC_CREATE]++; 1322 nfsm_reqhead(dvp, NFSPROC_CREATE, NFSX_FH(v3) + 2 * NFSX_UNSIGNED + 1323 nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1324 nfsm_fhtom(dvp, v3); 1325 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1326 if (v3) { 1327 nfsm_build(tl, u_long *, NFSX_UNSIGNED); 1328 if (fmode & O_EXCL) { 1329 *tl = txdr_unsigned(NFSV3CREATE_EXCLUSIVE); 1330 nfsm_build(tl, u_long *, NFSX_V3CREATEVERF); 1331 if (in_ifaddr) 1332 *tl++ = IA_SIN(in_ifaddr)->sin_addr.s_addr; 1333 else 1334 *tl++ = create_verf; 1335 *tl = ++create_verf; 1336 } else { 1337 *tl = txdr_unsigned(NFSV3CREATE_UNCHECKED); 1338 nfsm_build(tl, u_long *, NFSX_V3SRVSATTR); 1339 sp3 = (struct nfsv3_sattr *)tl; 1340 nfsm_v3sattr(sp3, vap, cnp->cn_cred->cr_uid, vattr.va_gid); 1341 } 1342 } else { 1343 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1344 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1345 sp->sa_uid = txdr_unsigned(cnp->cn_cred->cr_uid); 1346 sp->sa_gid = txdr_unsigned(vattr.va_gid); 1347 sp->sa_size = 0; 1348 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1349 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1350 } 1351 nfsm_request(dvp, NFSPROC_CREATE, cnp->cn_proc, cnp->cn_cred); 1352 if (!error) { 1353 nfsm_mtofh(dvp, newvp, v3, gotvp); 1354 if (!gotvp) { 1355 if (newvp) { 1356 vput(newvp); 1357 newvp = (struct vnode *)0; 1358 } 1359 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1360 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np); 1361 if (!error) 1362 newvp = NFSTOV(np); 1363 } 1364 } 1365 if (v3) 1366 nfsm_wcc_data(dvp, wccflag); 1367 nfsm_reqdone; 1368 if (error) { 1369 if (v3 && (fmode & O_EXCL) && error == NFSERR_NOTSUPP) { 1370 fmode &= ~O_EXCL; 1371 goto again; 1372 } 1373 if (newvp) 1374 vput(newvp); 1375 } else if (v3 && (fmode & O_EXCL)) 1376 error = nfs_setattrrpc(newvp, vap, cnp->cn_cred, cnp->cn_proc); 1377 if (!error) { 1378 if (cnp->cn_flags & MAKEENTRY) 1379 cache_enter(dvp, newvp, cnp); 1380 *ap->a_vpp = newvp; 1381 } 1382 FREE(cnp->cn_pnbuf, M_NAMEI); 1383 VTONFS(dvp)->n_flag |= NMODIFIED; 1384 if (!wccflag) 1385 VTONFS(dvp)->n_attrstamp = 0; 1386 vput(dvp); 1387 return (error); 1388} 1389 1390/* 1391 * nfs file remove call 1392 * To try and make nfs semantics closer to ufs semantics, a file that has 1393 * other processes using the vnode is renamed instead of removed and then 1394 * removed later on the last close. 1395 * - If v_usecount > 1 1396 * If a rename is not already in the works 1397 * call nfs_sillyrename() to set it up 1398 * else 1399 * do the remove rpc 1400 */ 1401int 1402nfs_remove(ap) 1403 struct vop_remove_args /* { 1404 struct vnodeop_desc *a_desc; 1405 struct vnode * a_dvp; 1406 struct vnode * a_vp; 1407 struct componentname * a_cnp; 1408 } */ *ap; 1409{ 1410 register struct vnode *vp = ap->a_vp; 1411 register struct vnode *dvp = ap->a_dvp; 1412 register struct componentname *cnp = ap->a_cnp; 1413 register struct nfsnode *np = VTONFS(vp); 1414 register u_long *tl; 1415 register caddr_t cp; 1416 register long t2; 1417 caddr_t bpos, dpos; 1418 int error = 0; 1419 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1420 struct vattr vattr; 1421 int v3 = NFS_ISV3(dvp); 1422 1423#ifndef DIAGNOSTIC 1424 if ((cnp->cn_flags & HASBUF) == 0) 1425 panic("nfs_remove: no name"); 1426 if (vp->v_usecount < 1) 1427 panic("nfs_remove: bad v_usecount"); 1428#endif 1429 if (vp->v_usecount == 1 || (np->n_sillyrename && 1430 VOP_GETATTR(vp, &vattr, cnp->cn_cred, cnp->cn_proc) == 0 && 1431 vattr.va_nlink > 1)) { 1432 /* 1433 * Purge the name cache so that the chance of a lookup for 1434 * the name succeeding while the remove is in progress is 1435 * minimized. Without node locking it can still happen, such 1436 * that an I/O op returns ESTALE, but since you get this if 1437 * another host removes the file.. 1438 */ 1439 cache_purge(vp); 1440 /* 1441 * throw away biocache buffers, mainly to avoid 1442 * unnecessary delayed writes later. 1443 */ 1444 error = nfs_vinvalbuf(vp, 0, cnp->cn_cred, cnp->cn_proc, 1); 1445 /* Do the rpc */ 1446 if (error != EINTR) 1447 error = nfs_removerpc(dvp, cnp->cn_nameptr, 1448 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc); 1449 /* 1450 * Kludge City: If the first reply to the remove rpc is lost.. 1451 * the reply to the retransmitted request will be ENOENT 1452 * since the file was in fact removed 1453 * Therefore, we cheat and return success. 1454 */ 1455 if (error == ENOENT) 1456 error = 0; 1457 } else if (!np->n_sillyrename) 1458 error = nfs_sillyrename(dvp, vp, cnp); 1459 FREE(cnp->cn_pnbuf, M_NAMEI); 1460 np->n_attrstamp = 0; 1461 vput(dvp); 1462 if (vp == dvp) 1463 vrele(vp); 1464 else 1465 vput(vp); 1466 return (error); 1467} 1468 1469/* 1470 * nfs file remove rpc called from nfs_inactive 1471 */ 1472int 1473nfs_removeit(sp) 1474 register struct sillyrename *sp; 1475{ 1476 1477 return (nfs_removerpc(sp->s_dvp, sp->s_name, sp->s_namlen, sp->s_cred, 1478 (struct proc *)0)); 1479} 1480 1481/* 1482 * Nfs remove rpc, called from nfs_remove() and nfs_removeit(). 1483 */ 1484int 1485nfs_removerpc(dvp, name, namelen, cred, proc) 1486 register struct vnode *dvp; 1487 char *name; 1488 int namelen; 1489 struct ucred *cred; 1490 struct proc *proc; 1491{ 1492 register u_long *tl; 1493 register caddr_t cp; 1494 register long t1, t2; 1495 caddr_t bpos, dpos, cp2; 1496 int error = 0, wccflag = NFSV3_WCCRATTR; 1497 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1498 int v3 = NFS_ISV3(dvp); 1499 1500 nfsstats.rpccnt[NFSPROC_REMOVE]++; 1501 nfsm_reqhead(dvp, NFSPROC_REMOVE, 1502 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(namelen)); 1503 nfsm_fhtom(dvp, v3); 1504 nfsm_strtom(name, namelen, NFS_MAXNAMLEN); 1505 nfsm_request(dvp, NFSPROC_REMOVE, proc, cred); 1506 if (v3) 1507 nfsm_wcc_data(dvp, wccflag); 1508 nfsm_reqdone; 1509 VTONFS(dvp)->n_flag |= NMODIFIED; 1510 if (!wccflag) 1511 VTONFS(dvp)->n_attrstamp = 0; 1512 return (error); 1513} 1514 1515/* 1516 * nfs file rename call 1517 */ 1518int 1519nfs_rename(ap) 1520 struct vop_rename_args /* { 1521 struct vnode *a_fdvp; 1522 struct vnode *a_fvp; 1523 struct componentname *a_fcnp; 1524 struct vnode *a_tdvp; 1525 struct vnode *a_tvp; 1526 struct componentname *a_tcnp; 1527 } */ *ap; 1528{ 1529 register struct vnode *fvp = ap->a_fvp; 1530 register struct vnode *tvp = ap->a_tvp; 1531 register struct vnode *fdvp = ap->a_fdvp; 1532 register struct vnode *tdvp = ap->a_tdvp; 1533 register struct componentname *tcnp = ap->a_tcnp; 1534 register struct componentname *fcnp = ap->a_fcnp; 1535 int error; 1536 1537#ifndef DIAGNOSTIC 1538 if ((tcnp->cn_flags & HASBUF) == 0 || 1539 (fcnp->cn_flags & HASBUF) == 0) 1540 panic("nfs_rename: no name"); 1541#endif 1542 /* Check for cross-device rename */ 1543 if ((fvp->v_mount != tdvp->v_mount) || 1544 (tvp && (fvp->v_mount != tvp->v_mount))) { 1545 error = EXDEV; 1546 goto out; 1547 } 1548 1549 /* 1550 * If the tvp exists and is in use, sillyrename it before doing the 1551 * rename of the new file over it. 1552 */ 1553 if (tvp && tvp->v_usecount > 1 && !VTONFS(tvp)->n_sillyrename && 1554 !nfs_sillyrename(tdvp, tvp, tcnp)) { 1555 vrele(tvp); 1556 tvp = NULL; 1557 } 1558 1559 error = nfs_renamerpc(fdvp, fcnp->cn_nameptr, fcnp->cn_namelen, 1560 tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred, 1561 tcnp->cn_proc); 1562 1563 if (fvp->v_type == VDIR) { 1564 if (tvp != NULL && tvp->v_type == VDIR) 1565 cache_purge(tdvp); 1566 cache_purge(fdvp); 1567 } 1568out: 1569 if (tdvp == tvp) 1570 vrele(tdvp); 1571 else 1572 vput(tdvp); 1573 if (tvp) 1574 vput(tvp); 1575 vrele(fdvp); 1576 vrele(fvp); 1577 /* 1578 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry. 1579 */ 1580 if (error == ENOENT) 1581 error = 0; 1582 return (error); 1583} 1584 1585/* 1586 * nfs file rename rpc called from nfs_remove() above 1587 */ 1588int 1589nfs_renameit(sdvp, scnp, sp) 1590 struct vnode *sdvp; 1591 struct componentname *scnp; 1592 register struct sillyrename *sp; 1593{ 1594 return (nfs_renamerpc(sdvp, scnp->cn_nameptr, scnp->cn_namelen, 1595 sdvp, sp->s_name, sp->s_namlen, scnp->cn_cred, scnp->cn_proc)); 1596} 1597 1598/* 1599 * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit(). 1600 */ 1601int 1602nfs_renamerpc(fdvp, fnameptr, fnamelen, tdvp, tnameptr, tnamelen, cred, proc) 1603 register struct vnode *fdvp; 1604 char *fnameptr; 1605 int fnamelen; 1606 register struct vnode *tdvp; 1607 char *tnameptr; 1608 int tnamelen; 1609 struct ucred *cred; 1610 struct proc *proc; 1611{ 1612 register u_long *tl; 1613 register caddr_t cp; 1614 register long t1, t2; 1615 caddr_t bpos, dpos, cp2; 1616 int error = 0, fwccflag = NFSV3_WCCRATTR, twccflag = NFSV3_WCCRATTR; 1617 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1618 int v3 = NFS_ISV3(fdvp); 1619 1620 nfsstats.rpccnt[NFSPROC_RENAME]++; 1621 nfsm_reqhead(fdvp, NFSPROC_RENAME, 1622 (NFSX_FH(v3) + NFSX_UNSIGNED)*2 + nfsm_rndup(fnamelen) + 1623 nfsm_rndup(tnamelen)); 1624 nfsm_fhtom(fdvp, v3); 1625 nfsm_strtom(fnameptr, fnamelen, NFS_MAXNAMLEN); 1626 nfsm_fhtom(tdvp, v3); 1627 nfsm_strtom(tnameptr, tnamelen, NFS_MAXNAMLEN); 1628 nfsm_request(fdvp, NFSPROC_RENAME, proc, cred); 1629 if (v3) { 1630 nfsm_wcc_data(fdvp, fwccflag); 1631 nfsm_wcc_data(tdvp, twccflag); 1632 } 1633 nfsm_reqdone; 1634 VTONFS(fdvp)->n_flag |= NMODIFIED; 1635 VTONFS(tdvp)->n_flag |= NMODIFIED; 1636 if (!fwccflag) 1637 VTONFS(fdvp)->n_attrstamp = 0; 1638 if (!twccflag) 1639 VTONFS(tdvp)->n_attrstamp = 0; 1640 return (error); 1641} 1642 1643/* 1644 * nfs hard link create call 1645 */ 1646int 1647nfs_link(ap) 1648 struct vop_link_args /* { 1649 struct vnode *a_vp; 1650 struct vnode *a_tdvp; 1651 struct componentname *a_cnp; 1652 } */ *ap; 1653{ 1654#if defined(__NetBSD__) 1655 /* 1656 * Since the args are reversed in the VOP_LINK() calls, 1657 * switch them back. Argh! 1658 */ 1659 register struct vnode *vp = ap->a_tdvp; 1660 register struct vnode *tdvp = ap->a_vp; 1661#else 1662 register struct vnode *vp = ap->a_vp; 1663 register struct vnode *tdvp = ap->a_tdvp; 1664#endif 1665 register struct componentname *cnp = ap->a_cnp; 1666 register u_long *tl; 1667 register caddr_t cp; 1668 register long t1, t2; 1669 caddr_t bpos, dpos, cp2; 1670 int error = 0, wccflag = NFSV3_WCCRATTR, attrflag = 0; 1671 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1672 int v3 = NFS_ISV3(vp); 1673 1674 if (vp->v_mount != tdvp->v_mount) { 1675 /*VOP_ABORTOP(vp, cnp);*/ 1676 if (tdvp == vp) 1677 vrele(tdvp); 1678 else 1679 vput(tdvp); 1680 return (EXDEV); 1681 } 1682 1683 /* 1684 * Push all writes to the server, so that the attribute cache 1685 * doesn't get "out of sync" with the server. 1686 * XXX There should be a better way! 1687 */ 1688 VOP_FSYNC(vp, cnp->cn_cred, MNT_WAIT, cnp->cn_proc); 1689 1690 nfsstats.rpccnt[NFSPROC_LINK]++; 1691 nfsm_reqhead(vp, NFSPROC_LINK, 1692 NFSX_FH(v3)*2 + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 1693 nfsm_fhtom(vp, v3); 1694 nfsm_fhtom(tdvp, v3); 1695 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1696 nfsm_request(vp, NFSPROC_LINK, cnp->cn_proc, cnp->cn_cred); 1697 if (v3) { 1698 nfsm_postop_attr(vp, attrflag); 1699 nfsm_wcc_data(tdvp, wccflag); 1700 } 1701 nfsm_reqdone; 1702 FREE(cnp->cn_pnbuf, M_NAMEI); 1703 VTONFS(tdvp)->n_flag |= NMODIFIED; 1704 if (!attrflag) 1705 VTONFS(vp)->n_attrstamp = 0; 1706 if (!wccflag) 1707 VTONFS(tdvp)->n_attrstamp = 0; 1708 vput(tdvp); 1709 /* 1710 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 1711 */ 1712 if (error == EEXIST) 1713 error = 0; 1714 return (error); 1715} 1716 1717/* 1718 * nfs symbolic link create call 1719 */ 1720int 1721nfs_symlink(ap) 1722 struct vop_symlink_args /* { 1723 struct vnode *a_dvp; 1724 struct vnode **a_vpp; 1725 struct componentname *a_cnp; 1726 struct vattr *a_vap; 1727 char *a_target; 1728 } */ *ap; 1729{ 1730 register struct vnode *dvp = ap->a_dvp; 1731 register struct vattr *vap = ap->a_vap; 1732 register struct componentname *cnp = ap->a_cnp; 1733 register struct nfsv2_sattr *sp; 1734 register struct nfsv3_sattr *sp3; 1735 register u_long *tl; 1736 register caddr_t cp; 1737 register long t1, t2; 1738 caddr_t bpos, dpos, cp2; 1739 int slen, error = 0, wccflag = NFSV3_WCCRATTR, gotvp; 1740 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1741 struct vnode *newvp = (struct vnode *)0; 1742 int v3 = NFS_ISV3(dvp); 1743 1744 nfsstats.rpccnt[NFSPROC_SYMLINK]++; 1745 slen = strlen(ap->a_target); 1746 nfsm_reqhead(dvp, NFSPROC_SYMLINK, NFSX_FH(v3) + 2*NFSX_UNSIGNED + 1747 nfsm_rndup(cnp->cn_namelen) + nfsm_rndup(slen) + NFSX_SATTR(v3)); 1748 nfsm_fhtom(dvp, v3); 1749 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1750 if (v3) { 1751 nfsm_build(sp3, struct nfsv3_sattr *, NFSX_V3SRVSATTR); 1752 nfsm_v3sattr(sp3, vap, cnp->cn_cred->cr_uid, 1753 cnp->cn_cred->cr_gid); 1754 } 1755 nfsm_strtom(ap->a_target, slen, NFS_MAXPATHLEN); 1756 if (!v3) { 1757 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1758 sp->sa_mode = vtonfsv2_mode(VLNK, vap->va_mode); 1759 sp->sa_uid = txdr_unsigned(cnp->cn_cred->cr_uid); 1760 sp->sa_gid = txdr_unsigned(cnp->cn_cred->cr_gid); 1761 sp->sa_size = -1; 1762 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1763 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1764 } 1765 nfsm_request(dvp, NFSPROC_SYMLINK, cnp->cn_proc, cnp->cn_cred); 1766 if (v3) { 1767 if (!error) 1768 nfsm_mtofh(dvp, newvp, v3, gotvp); 1769 nfsm_wcc_data(dvp, wccflag); 1770 } 1771 nfsm_reqdone; 1772 if (newvp) 1773 vput(newvp); 1774 FREE(cnp->cn_pnbuf, M_NAMEI); 1775 VTONFS(dvp)->n_flag |= NMODIFIED; 1776 if (!wccflag) 1777 VTONFS(dvp)->n_attrstamp = 0; 1778 vput(dvp); 1779 /* 1780 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 1781 */ 1782 if (error == EEXIST) 1783 error = 0; 1784 return (error); 1785} 1786 1787/* 1788 * nfs make dir call 1789 */ 1790int 1791nfs_mkdir(ap) 1792 struct vop_mkdir_args /* { 1793 struct vnode *a_dvp; 1794 struct vnode **a_vpp; 1795 struct componentname *a_cnp; 1796 struct vattr *a_vap; 1797 } */ *ap; 1798{ 1799 register struct vnode *dvp = ap->a_dvp; 1800 register struct vattr *vap = ap->a_vap; 1801 register struct componentname *cnp = ap->a_cnp; 1802 register struct nfsv2_sattr *sp; 1803 register struct nfsv3_sattr *sp3; 1804 register u_long *tl; 1805 register caddr_t cp; 1806 register long t1, t2; 1807 register int len; 1808 struct nfsnode *np = (struct nfsnode *)0; 1809 struct vnode *newvp = (struct vnode *)0; 1810 caddr_t bpos, dpos, cp2; 1811 nfsfh_t *fhp; 1812 int error = 0, wccflag = NFSV3_WCCRATTR, attrflag; 1813 int fhsize, gotvp = 0; 1814 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1815 struct vattr vattr; 1816 int v3 = NFS_ISV3(dvp); 1817 1818 if (error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred, cnp->cn_proc)) { 1819 VOP_ABORTOP(dvp, cnp); 1820 vput(dvp); 1821 return (error); 1822 } 1823 len = cnp->cn_namelen; 1824 nfsstats.rpccnt[NFSPROC_MKDIR]++; 1825 nfsm_reqhead(dvp, NFSPROC_MKDIR, 1826 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len) + NFSX_SATTR(v3)); 1827 nfsm_fhtom(dvp, v3); 1828 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 1829 if (v3) { 1830 nfsm_build(sp3, struct nfsv3_sattr *, NFSX_V3SRVSATTR); 1831 nfsm_v3sattr(sp3, vap, cnp->cn_cred->cr_uid, vattr.va_gid); 1832 } else { 1833 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1834 sp->sa_mode = vtonfsv2_mode(VDIR, vap->va_mode); 1835 sp->sa_uid = txdr_unsigned(cnp->cn_cred->cr_uid); 1836 sp->sa_gid = txdr_unsigned(vattr.va_gid); 1837 sp->sa_size = -1; 1838 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1839 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1840 } 1841 nfsm_request(dvp, NFSPROC_MKDIR, cnp->cn_proc, cnp->cn_cred); 1842 if (!error) 1843 nfsm_mtofh(dvp, newvp, v3, gotvp); 1844 if (v3) 1845 nfsm_wcc_data(dvp, wccflag); 1846 nfsm_reqdone; 1847 VTONFS(dvp)->n_flag |= NMODIFIED; 1848 if (!wccflag) 1849 VTONFS(dvp)->n_attrstamp = 0; 1850 /* 1851 * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry 1852 * if we can succeed in looking up the directory. 1853 */ 1854 if (error == EEXIST || (!error && !gotvp)) { 1855 if (newvp) { 1856 vrele(newvp); 1857 newvp = (struct vnode *)0; 1858 } 1859 error = nfs_lookitup(dvp, cnp->cn_nameptr, len, cnp->cn_cred, 1860 cnp->cn_proc, &np); 1861 if (!error) { 1862 newvp = NFSTOV(np); 1863 if (newvp->v_type != VDIR) 1864 error = EEXIST; 1865 } 1866 } 1867 if (error) { 1868 if (newvp) 1869 vrele(newvp); 1870 } else 1871 *ap->a_vpp = newvp; 1872 FREE(cnp->cn_pnbuf, M_NAMEI); 1873 vput(dvp); 1874 return (error); 1875} 1876 1877/* 1878 * nfs remove directory call 1879 */ 1880int 1881nfs_rmdir(ap) 1882 struct vop_rmdir_args /* { 1883 struct vnode *a_dvp; 1884 struct vnode *a_vp; 1885 struct componentname *a_cnp; 1886 } */ *ap; 1887{ 1888 register struct vnode *vp = ap->a_vp; 1889 register struct vnode *dvp = ap->a_dvp; 1890 register struct componentname *cnp = ap->a_cnp; 1891 register u_long *tl; 1892 register caddr_t cp; 1893 register long t1, t2; 1894 caddr_t bpos, dpos, cp2; 1895 int error = 0, wccflag = NFSV3_WCCRATTR; 1896 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1897 int v3 = NFS_ISV3(dvp); 1898 1899 if (dvp == vp) { 1900 vput(dvp); 1901 vrele(dvp); 1902 FREE(cnp->cn_pnbuf, M_NAMEI); 1903 return (EINVAL); 1904 } 1905 nfsstats.rpccnt[NFSPROC_RMDIR]++; 1906 nfsm_reqhead(dvp, NFSPROC_RMDIR, 1907 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 1908 nfsm_fhtom(dvp, v3); 1909 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1910 nfsm_request(dvp, NFSPROC_RMDIR, cnp->cn_proc, cnp->cn_cred); 1911 if (v3) 1912 nfsm_wcc_data(dvp, wccflag); 1913 nfsm_reqdone; 1914 FREE(cnp->cn_pnbuf, M_NAMEI); 1915 VTONFS(dvp)->n_flag |= NMODIFIED; 1916 if (!wccflag) 1917 VTONFS(dvp)->n_attrstamp = 0; 1918 cache_purge(dvp); 1919 cache_purge(vp); 1920 vput(vp); 1921 vput(dvp); 1922 /* 1923 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry. 1924 */ 1925 if (error == ENOENT) 1926 error = 0; 1927 return (error); 1928} 1929 1930/* 1931 * nfs readdir call 1932 */ 1933int 1934nfs_readdir(ap) 1935 struct vop_readdir_args /* { 1936 struct vnode *a_vp; 1937 struct uio *a_uio; 1938 struct ucred *a_cred; 1939 } */ *ap; 1940{ 1941 register struct vnode *vp = ap->a_vp; 1942 register struct nfsnode *np = VTONFS(vp); 1943 register struct uio *uio = ap->a_uio; 1944 int tresid, error; 1945 struct vattr vattr; 1946 1947 if (vp->v_type != VDIR) 1948 return (EPERM); 1949 /* 1950 * First, check for hit on the EOF offset cache 1951 */ 1952 if (np->n_direofoffset > 0 && uio->uio_offset >= np->n_direofoffset && 1953 (np->n_flag & NMODIFIED) == 0) { 1954 if (VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS) { 1955 if (NQNFS_CKCACHABLE(vp, ND_READ)) { 1956 nfsstats.direofcache_hits++; 1957 return (0); 1958 } 1959 } else if (VOP_GETATTR(vp, &vattr, ap->a_cred, uio->uio_procp) == 0 && 1960 np->n_mtime == vattr.va_mtime.ts_sec) { 1961 nfsstats.direofcache_hits++; 1962 return (0); 1963 } 1964 } 1965 1966 /* 1967 * Call nfs_bioread() to do the real work. 1968 */ 1969 tresid = uio->uio_resid; 1970 error = nfs_bioread(vp, uio, 0, ap->a_cred); 1971 1972 if (!error && uio->uio_resid == tresid) 1973 nfsstats.direofcache_misses++; 1974 return (error); 1975} 1976 1977/* 1978 * Readdir rpc call. 1979 * Called from below the buffer cache by nfs_doio(). 1980 */ 1981int 1982nfs_readdirrpc(vp, uiop, cred) 1983 struct vnode *vp; 1984 register struct uio *uiop; 1985 struct ucred *cred; 1986 1987{ 1988 register int len, left; 1989 register struct dirent *dp; 1990 register u_long *tl; 1991 register caddr_t cp; 1992 register long t1, t2; 1993 register nfsuint64 *cookiep; 1994 caddr_t bpos, dpos, cp2; 1995 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1996 nfsuint64 cookie; 1997 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1998 struct nfsnode *dnp = VTONFS(vp); 1999 nfsfh_t *fhp; 2000 u_quad_t frev, fileno; 2001 int error = 0, tlen, more_dirs = 1, blksiz = 0, bigenough = 1, i; 2002 int cachable, attrflag, fhsize; 2003 int v3 = NFS_ISV3(vp); 2004 2005#ifndef nolint 2006 dp = (struct dirent *)0; 2007#endif 2008#ifndef DIAGNOSTIC 2009 if (uiop->uio_iovcnt != 1 || (uiop->uio_offset & (NFS_DIRBLKSIZ - 1)) || 2010 (uiop->uio_resid & (NFS_DIRBLKSIZ - 1))) 2011 panic("nfs readdirrpc bad uio"); 2012#endif 2013 2014 /* 2015 * If there is no cookie, assume end of directory. 2016 */ 2017 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 0); 2018 if (cookiep) 2019 cookie = *cookiep; 2020 else 2021 return (0); 2022 /* 2023 * Loop around doing readdir rpc's of size nm_readdirsize 2024 * truncated to a multiple of DIRBLKSIZ. 2025 * The stopping criteria is EOF or buffer full. 2026 */ 2027 while (more_dirs && bigenough) { 2028 nfsstats.rpccnt[NFSPROC_READDIR]++; 2029 nfsm_reqhead(vp, NFSPROC_READDIR, NFSX_FH(v3) + 2030 NFSX_READDIR(v3)); 2031 nfsm_fhtom(vp, v3); 2032 if (v3) { 2033 nfsm_build(tl, u_long *, 5 * NFSX_UNSIGNED); 2034 *tl++ = cookie.nfsuquad[0]; 2035 *tl++ = cookie.nfsuquad[1]; 2036 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2037 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2038 } else { 2039 nfsm_build(tl, u_long *, 2 * NFSX_UNSIGNED); 2040 *tl++ = cookie.nfsuquad[0]; 2041 } 2042 *tl = txdr_unsigned(nmp->nm_readdirsize); 2043 nfsm_request(vp, NFSPROC_READDIR, uiop->uio_procp, cred); 2044 if (v3) { 2045 nfsm_postop_attr(vp, attrflag); 2046 if (!error) { 2047 nfsm_dissect(tl, u_long *, 2 * NFSX_UNSIGNED); 2048 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2049 dnp->n_cookieverf.nfsuquad[1] = *tl; 2050 } else { 2051 m_freem(mrep); 2052 goto nfsmout; 2053 } 2054 } 2055 nfsm_dissect(tl, u_long *, NFSX_UNSIGNED); 2056 more_dirs = fxdr_unsigned(int, *tl); 2057 2058 /* loop thru the dir entries, doctoring them to 4bsd form */ 2059 while (more_dirs && bigenough) { 2060 if (v3) { 2061 nfsm_dissect(tl, u_long *, 3 * NFSX_UNSIGNED); 2062 fxdr_hyper(tl, &fileno); 2063 len = fxdr_unsigned(int, *(tl + 2)); 2064 } else { 2065 nfsm_dissect(tl, u_long *, 2 * NFSX_UNSIGNED); 2066 fileno = fxdr_unsigned(u_quad_t, *tl++); 2067 len = fxdr_unsigned(int, *tl); 2068 } 2069 if (len <= 0 || len > NFS_MAXNAMLEN) { 2070 error = EBADRPC; 2071 m_freem(mrep); 2072 goto nfsmout; 2073 } 2074 tlen = nfsm_rndup(len); 2075 if (tlen == len) 2076 tlen += 4; /* To ensure null termination */ 2077 left = DIRBLKSIZ - blksiz; 2078 if ((tlen + DIRHDSIZ) > left) { 2079 dp->d_reclen += left; 2080 uiop->uio_iov->iov_base += left; 2081 uiop->uio_iov->iov_len -= left; 2082 uiop->uio_offset += left; 2083 uiop->uio_resid -= left; 2084 blksiz = 0; 2085 } 2086 if ((tlen + DIRHDSIZ) > uiop->uio_resid) 2087 bigenough = 0; 2088 if (bigenough) { 2089 dp = (struct dirent *)uiop->uio_iov->iov_base; 2090 dp->d_fileno = (int)fileno; 2091 dp->d_namlen = len; 2092 dp->d_reclen = tlen + DIRHDSIZ; 2093 dp->d_type = DT_UNKNOWN; 2094 blksiz += dp->d_reclen; 2095 if (blksiz == DIRBLKSIZ) 2096 blksiz = 0; 2097 uiop->uio_offset += DIRHDSIZ; 2098 uiop->uio_resid -= DIRHDSIZ; 2099 uiop->uio_iov->iov_base += DIRHDSIZ; 2100 uiop->uio_iov->iov_len -= DIRHDSIZ; 2101 nfsm_mtouio(uiop, len); 2102 cp = uiop->uio_iov->iov_base; 2103 tlen -= len; 2104 *cp = '\0'; /* null terminate */ 2105 uiop->uio_iov->iov_base += tlen; 2106 uiop->uio_iov->iov_len -= tlen; 2107 uiop->uio_offset += tlen; 2108 uiop->uio_resid -= tlen; 2109 } else 2110 nfsm_adv(nfsm_rndup(len)); 2111 if (v3) { 2112 nfsm_dissect(tl, u_long *, 3 * NFSX_UNSIGNED); 2113 } else { 2114 nfsm_dissect(tl, u_long *, 2 * NFSX_UNSIGNED); 2115 } 2116 if (bigenough) { 2117 cookie.nfsuquad[0] = *tl++; 2118 if (v3) 2119 cookie.nfsuquad[1] = *tl++; 2120 } else if (v3) 2121 tl += 2; 2122 else 2123 tl++; 2124 more_dirs = fxdr_unsigned(int, *tl); 2125 } 2126 /* 2127 * If at end of rpc data, get the eof boolean 2128 */ 2129 if (!more_dirs) { 2130 nfsm_dissect(tl, u_long *, NFSX_UNSIGNED); 2131 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2132 } 2133 m_freem(mrep); 2134 } 2135 /* 2136 * Fill last record, iff any, out to a multiple of DIRBLKSIZ 2137 * by increasing d_reclen for the last record. 2138 */ 2139 if (blksiz > 0) { 2140 left = DIRBLKSIZ - blksiz; 2141 dp->d_reclen += left; 2142 uiop->uio_iov->iov_base += left; 2143 uiop->uio_iov->iov_len -= left; 2144 uiop->uio_offset += left; 2145 uiop->uio_resid -= left; 2146 } 2147 2148 /* 2149 * We are now either at the end of the directory or have filled the 2150 * block. 2151 */ 2152 if (bigenough) 2153 dnp->n_direofoffset = uiop->uio_offset; 2154 else { 2155 if (uiop->uio_resid > 0) 2156 printf("EEK! readdirrpc resid > 0\n"); 2157 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 1); 2158 *cookiep = cookie; 2159 } 2160nfsmout: 2161 return (error); 2162} 2163 2164/* 2165 * NFS V3 readdir plus RPC. Used in place of nfs_readdirrpc(). 2166 */ 2167int 2168nfs_readdirplusrpc(vp, uiop, cred) 2169 struct vnode *vp; 2170 register struct uio *uiop; 2171 struct ucred *cred; 2172{ 2173 register int len, left; 2174 register struct dirent *dp; 2175 register u_long *tl; 2176 register caddr_t cp; 2177 register long t1, t2; 2178 register struct vnode *newvp; 2179 register nfsuint64 *cookiep; 2180 caddr_t bpos, dpos, cp2, dpossav1, dpossav2; 2181 struct mbuf *mreq, *mrep, *md, *mb, *mb2, *mdsav1, *mdsav2; 2182 struct nameidata nami, *ndp = &nami; 2183 struct componentname *cnp = &ndp->ni_cnd; 2184 nfsuint64 cookie; 2185 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2186 struct nfsnode *dnp = VTONFS(vp), *np; 2187 nfsfh_t *fhp; 2188 u_quad_t frev, fileno; 2189 int error = 0, tlen, more_dirs = 1, blksiz = 0, doit, bigenough = 1, i; 2190 int cachable, attrflag, fhsize; 2191 2192#ifndef nolint 2193 dp = (struct dirent *)0; 2194#endif 2195#ifndef DIAGNOSTIC 2196 if (uiop->uio_iovcnt != 1 || (uiop->uio_offset & (DIRBLKSIZ - 1)) || 2197 (uiop->uio_resid & (DIRBLKSIZ - 1))) 2198 panic("nfs readdirplusrpc bad uio"); 2199#endif 2200 ndp->ni_dvp = vp; 2201 newvp = NULLVP; 2202 2203 /* 2204 * If there is no cookie, assume end of directory. 2205 */ 2206 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 0); 2207 if (cookiep) 2208 cookie = *cookiep; 2209 else 2210 return (0); 2211 /* 2212 * Loop around doing readdir rpc's of size nm_readdirsize 2213 * truncated to a multiple of DIRBLKSIZ. 2214 * The stopping criteria is EOF or buffer full. 2215 */ 2216 while (more_dirs && bigenough) { 2217 nfsstats.rpccnt[NFSPROC_READDIRPLUS]++; 2218 nfsm_reqhead(vp, NFSPROC_READDIRPLUS, 2219 NFSX_FH(1) + 6 * NFSX_UNSIGNED); 2220 nfsm_fhtom(vp, 1); 2221 nfsm_build(tl, u_long *, 6 * NFSX_UNSIGNED); 2222 *tl++ = cookie.nfsuquad[0]; 2223 *tl++ = cookie.nfsuquad[1]; 2224 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2225 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2226 *tl++ = txdr_unsigned(nmp->nm_readdirsize); 2227 *tl = txdr_unsigned(nmp->nm_rsize); 2228 nfsm_request(vp, NFSPROC_READDIRPLUS, uiop->uio_procp, cred); 2229 nfsm_postop_attr(vp, attrflag); 2230 if (error) { 2231 m_freem(mrep); 2232 goto nfsmout; 2233 } 2234 nfsm_dissect(tl, u_long *, 3 * NFSX_UNSIGNED); 2235 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2236 dnp->n_cookieverf.nfsuquad[1] = *tl++; 2237 more_dirs = fxdr_unsigned(int, *tl); 2238 2239 /* loop thru the dir entries, doctoring them to 4bsd form */ 2240 while (more_dirs && bigenough) { 2241 nfsm_dissect(tl, u_long *, 3 * NFSX_UNSIGNED); 2242 fxdr_hyper(tl, &fileno); 2243 len = fxdr_unsigned(int, *(tl + 2)); 2244 if (len <= 0 || len > NFS_MAXNAMLEN) { 2245 error = EBADRPC; 2246 m_freem(mrep); 2247 goto nfsmout; 2248 } 2249 tlen = nfsm_rndup(len); 2250 if (tlen == len) 2251 tlen += 4; /* To ensure null termination*/ 2252 left = DIRBLKSIZ - blksiz; 2253 if ((tlen + DIRHDSIZ) > left) { 2254 dp->d_reclen += left; 2255 uiop->uio_iov->iov_base += left; 2256 uiop->uio_iov->iov_len -= left; 2257 uiop->uio_offset += left; 2258 uiop->uio_resid -= left; 2259 blksiz = 0; 2260 } 2261 if ((tlen + DIRHDSIZ) > uiop->uio_resid) 2262 bigenough = 0; 2263 if (bigenough) { 2264 dp = (struct dirent *)uiop->uio_iov->iov_base; 2265 dp->d_fileno = (int)fileno; 2266 dp->d_namlen = len; 2267 dp->d_reclen = tlen + DIRHDSIZ; 2268 dp->d_type = DT_UNKNOWN; 2269 blksiz += dp->d_reclen; 2270 if (blksiz == DIRBLKSIZ) 2271 blksiz = 0; 2272 uiop->uio_offset += DIRHDSIZ; 2273 uiop->uio_resid -= DIRHDSIZ; 2274 uiop->uio_iov->iov_base += DIRHDSIZ; 2275 uiop->uio_iov->iov_len -= DIRHDSIZ; 2276 cnp->cn_nameptr = uiop->uio_iov->iov_base; 2277 cnp->cn_namelen = len; 2278 nfsm_mtouio(uiop, len); 2279 cp = uiop->uio_iov->iov_base; 2280 tlen -= len; 2281 *cp = '\0'; 2282 uiop->uio_iov->iov_base += tlen; 2283 uiop->uio_iov->iov_len -= tlen; 2284 uiop->uio_offset += tlen; 2285 uiop->uio_resid -= tlen; 2286 } else 2287 nfsm_adv(nfsm_rndup(len)); 2288 nfsm_dissect(tl, u_long *, 3 * NFSX_UNSIGNED); 2289 if (bigenough) { 2290 cookie.nfsuquad[0] = *tl++; 2291 cookie.nfsuquad[1] = *tl++; 2292 } else 2293 tl += 2; 2294 2295 /* 2296 * Since the attributes are before the file handle 2297 * (sigh), we must skip over the attributes and then 2298 * come back and get them. 2299 */ 2300 attrflag = fxdr_unsigned(int, *tl); 2301 if (attrflag) { 2302 dpossav1 = dpos; 2303 mdsav1 = md; 2304 nfsm_adv(NFSX_V3FATTR); 2305 nfsm_dissect(tl, u_long *, NFSX_UNSIGNED); 2306 doit = fxdr_unsigned(int, *tl); 2307 if (doit) { 2308 nfsm_getfh(fhp, fhsize, 1); 2309 if (NFS_CMPFH(dnp, fhp, fhsize)) { 2310 VREF(vp); 2311 newvp = vp; 2312 np = dnp; 2313 } else { 2314 if (error = nfs_nget(vp->v_mount, fhp, 2315 fhsize, &np)) 2316 doit = 0; 2317 else 2318 newvp = NFSTOV(np); 2319 } 2320 } 2321 if (doit) { 2322 dpossav2 = dpos; 2323 dpos = dpossav1; 2324 mdsav2 = md; 2325 md = mdsav1; 2326 nfsm_loadattr(newvp, (struct vattr *)0); 2327 dpos = dpossav2; 2328 md = mdsav2; 2329 dp->d_type = 2330 IFTODT(VTTOIF(np->n_vattr.va_type)); 2331 ndp->ni_vp = newvp; 2332 cnp->cn_hash = 0; 2333 for (cp = cnp->cn_nameptr, i = 1; i <= len; 2334 i++, cp++) 2335 cnp->cn_hash += (unsigned char)*cp * i; 2336 if (cnp->cn_namelen <= NCHNAMLEN) 2337 cache_enter(ndp->ni_dvp, ndp->ni_vp, cnp); 2338 } 2339 } else { 2340 /* Just skip over the file handle */ 2341 nfsm_dissect(tl, u_long *, NFSX_UNSIGNED); 2342 i = fxdr_unsigned(int, *tl); 2343 nfsm_adv(nfsm_rndup(i)); 2344 } 2345 if (newvp != NULLVP) { 2346 vrele(newvp); 2347 newvp = NULLVP; 2348 } 2349 nfsm_dissect(tl, u_long *, NFSX_UNSIGNED); 2350 more_dirs = fxdr_unsigned(int, *tl); 2351 } 2352 /* 2353 * If at end of rpc data, get the eof boolean 2354 */ 2355 if (!more_dirs) { 2356 nfsm_dissect(tl, u_long *, NFSX_UNSIGNED); 2357 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2358 } 2359 m_freem(mrep); 2360 } 2361 /* 2362 * Fill last record, iff any, out to a multiple of NFS_DIRBLKSIZ 2363 * by increasing d_reclen for the last record. 2364 */ 2365 if (blksiz > 0) { 2366 left = DIRBLKSIZ - blksiz; 2367 dp->d_reclen += left; 2368 uiop->uio_iov->iov_base += left; 2369 uiop->uio_iov->iov_len -= left; 2370 uiop->uio_offset += left; 2371 uiop->uio_resid -= left; 2372 } 2373 2374 /* 2375 * We are now either at the end of the directory or have filled the 2376 * block. 2377 */ 2378 if (bigenough) 2379 dnp->n_direofoffset = uiop->uio_offset; 2380 else { 2381 if (uiop->uio_resid > 0) 2382 printf("EEK! readdirplusrpc resid > 0\n"); 2383 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 1); 2384 *cookiep = cookie; 2385 } 2386nfsmout: 2387 if (newvp != NULLVP) { 2388 if (newvp == vp) 2389 vrele(newvp); 2390 else 2391 vput(newvp); 2392 newvp = NULLVP; 2393 } 2394 return (error); 2395} 2396static char hextoasc[] = "0123456789abcdef"; 2397 2398/* 2399 * Silly rename. To make the NFS filesystem that is stateless look a little 2400 * more like the "ufs" a remove of an active vnode is translated to a rename 2401 * to a funny looking filename that is removed by nfs_inactive on the 2402 * nfsnode. There is the potential for another process on a different client 2403 * to create the same funny name between the nfs_lookitup() fails and the 2404 * nfs_rename() completes, but... 2405 */ 2406int 2407nfs_sillyrename(dvp, vp, cnp) 2408 struct vnode *dvp, *vp; 2409 struct componentname *cnp; 2410{ 2411 register struct sillyrename *sp; 2412 struct nfsnode *np; 2413 int error; 2414 short pid; 2415 2416 cache_purge(dvp); 2417 np = VTONFS(vp); 2418#ifndef DIAGNOSTIC 2419 if (vp->v_type == VDIR) 2420 panic("nfs: sillyrename dir"); 2421#endif 2422 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename), 2423 M_NFSREQ, M_WAITOK); 2424 sp->s_cred = crdup(cnp->cn_cred); 2425 sp->s_dvp = dvp; 2426 VREF(dvp); 2427 2428 /* Fudge together a funny name */ 2429 pid = cnp->cn_proc->p_pid; 2430 bcopy(".nfsAxxxx4.4", sp->s_name, 13); 2431 sp->s_namlen = 12; 2432 sp->s_name[8] = hextoasc[pid & 0xf]; 2433 sp->s_name[7] = hextoasc[(pid >> 4) & 0xf]; 2434 sp->s_name[6] = hextoasc[(pid >> 8) & 0xf]; 2435 sp->s_name[5] = hextoasc[(pid >> 12) & 0xf]; 2436 2437 /* Try lookitups until we get one that isn't there */ 2438 while (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2439 cnp->cn_proc, (struct nfsnode **)0) == 0) { 2440 sp->s_name[4]++; 2441 if (sp->s_name[4] > 'z') { 2442 error = EINVAL; 2443 goto bad; 2444 } 2445 } 2446 if (error = nfs_renameit(dvp, cnp, sp)) 2447 goto bad; 2448 error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2449 cnp->cn_proc, &np); 2450 np->n_sillyrename = sp; 2451 return (0); 2452bad: 2453 vrele(sp->s_dvp); 2454 crfree(sp->s_cred); 2455 free((caddr_t)sp, M_NFSREQ); 2456 return (error); 2457} 2458 2459/* 2460 * Look up a file name and optionally either update the file handle or 2461 * allocate an nfsnode, depending on the value of npp. 2462 * npp == NULL --> just do the lookup 2463 * *npp == NULL --> allocate a new nfsnode and make sure attributes are 2464 * handled too 2465 * *npp != NULL --> update the file handle in the vnode 2466 */ 2467int 2468nfs_lookitup(dvp, name, len, cred, procp, npp) 2469 register struct vnode *dvp; 2470 char *name; 2471 int len; 2472 struct ucred *cred; 2473 struct proc *procp; 2474 struct nfsnode **npp; 2475{ 2476 register u_long *tl; 2477 register caddr_t cp; 2478 register long t1, t2; 2479 struct vnode *newvp = (struct vnode *)0; 2480 struct nfsnode *np, *dnp = VTONFS(dvp); 2481 caddr_t bpos, dpos, cp2; 2482 int error = 0, fhlen, attrflag; 2483 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2484 nfsfh_t *nfhp; 2485 int v3 = NFS_ISV3(dvp); 2486 2487 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 2488 nfsm_reqhead(dvp, NFSPROC_LOOKUP, 2489 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 2490 nfsm_fhtom(dvp, v3); 2491 nfsm_strtom(name, len, NFS_MAXNAMLEN); 2492 nfsm_request(dvp, NFSPROC_LOOKUP, procp, cred); 2493 if (npp && !error) { 2494 nfsm_getfh(nfhp, fhlen, v3); 2495 if (*npp) { 2496 np = *npp; 2497 if (np->n_fhsize > NFS_SMALLFH && fhlen <= NFS_SMALLFH) { 2498 free((caddr_t)np->n_fhp, M_NFSBIGFH); 2499 np->n_fhp = &np->n_fh; 2500 } else if (np->n_fhsize <= NFS_SMALLFH && fhlen>NFS_SMALLFH) 2501 np->n_fhp =(nfsfh_t *)malloc(fhlen,M_NFSBIGFH,M_WAITOK); 2502 bcopy((caddr_t)nfhp, (caddr_t)np->n_fhp, fhlen); 2503 np->n_fhsize = fhlen; 2504 newvp = NFSTOV(np); 2505 } else if (NFS_CMPFH(dnp, nfhp, fhlen)) { 2506 VREF(dvp); 2507 newvp = dvp; 2508 } else { 2509 error = nfs_nget(dvp->v_mount, nfhp, fhlen, &np); 2510 if (error) { 2511 m_freem(mrep); 2512 return (error); 2513 } 2514 newvp = NFSTOV(np); 2515 } 2516 if (v3) { 2517 nfsm_postop_attr(newvp, attrflag); 2518 if (!attrflag && *npp == NULL) { 2519 m_freem(mrep); 2520 if (newvp == dvp) 2521 vrele(newvp); 2522 else 2523 vput(newvp); 2524 return (ENOENT); 2525 } 2526 } else 2527 nfsm_loadattr(newvp, (struct vattr *)0); 2528 } 2529 nfsm_reqdone; 2530 if (npp && *npp == NULL) { 2531 if (error) { 2532 if (newvp) 2533 if (newvp == dvp) 2534 vrele(newvp); 2535 else 2536 vput(newvp); 2537 } else 2538 *npp = np; 2539 } 2540 return (error); 2541} 2542 2543/* 2544 * Nfs Version 3 commit rpc 2545 */ 2546int 2547nfs_commit(vp, offset, cnt, cred, procp) 2548 register struct vnode *vp; 2549 u_quad_t offset; 2550 int cnt; 2551 struct ucred *cred; 2552 struct proc *procp; 2553{ 2554 register caddr_t cp; 2555 register u_long *tl; 2556 register int t1, t2; 2557 register struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2558 caddr_t bpos, dpos, cp2; 2559 int error = 0, wccflag = NFSV3_WCCRATTR; 2560 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2561 2562 if ((nmp->nm_flag & NFSMNT_HASWRITEVERF) == 0) 2563 return (0); 2564 nfsstats.rpccnt[NFSPROC_COMMIT]++; 2565 nfsm_reqhead(vp, NFSPROC_COMMIT, NFSX_FH(1)); 2566 nfsm_fhtom(vp, 1); 2567 nfsm_build(tl, u_long *, 3 * NFSX_UNSIGNED); 2568 txdr_hyper(&offset, tl); 2569 tl += 2; 2570 *tl = txdr_unsigned(cnt); 2571 nfsm_request(vp, NFSPROC_COMMIT, procp, cred); 2572 nfsm_wcc_data(vp, wccflag); 2573 if (!error) { 2574 nfsm_dissect(tl, u_long *, NFSX_V3WRITEVERF); 2575 if (bcmp((caddr_t)nmp->nm_verf, (caddr_t)tl, 2576 NFSX_V3WRITEVERF)) { 2577 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf, 2578 NFSX_V3WRITEVERF); 2579 error = NFSERR_STALEWRITEVERF; 2580 } 2581 } 2582 nfsm_reqdone; 2583 return (error); 2584} 2585 2586/* 2587 * Kludge City.. 2588 * - make nfs_bmap() essentially a no-op that does no translation 2589 * - do nfs_strategy() by doing I/O with nfs_readrpc/nfs_writerpc 2590 * (Maybe I could use the process's page mapping, but I was concerned that 2591 * Kernel Write might not be enabled and also figured copyout() would do 2592 * a lot more work than bcopy() and also it currently happens in the 2593 * context of the swapper process (2). 2594 */ 2595int 2596nfs_bmap(ap) 2597 struct vop_bmap_args /* { 2598 struct vnode *a_vp; 2599 daddr_t a_bn; 2600 struct vnode **a_vpp; 2601 daddr_t *a_bnp; 2602 int *a_runp; 2603 } */ *ap; 2604{ 2605 register struct vnode *vp = ap->a_vp; 2606 2607 if (ap->a_vpp != NULL) 2608 *ap->a_vpp = vp; 2609 if (ap->a_bnp != NULL) 2610 *ap->a_bnp = ap->a_bn * btodb(vp->v_mount->mnt_stat.f_iosize); 2611 if (ap->a_runp != NULL) 2612 *ap->a_runp = 0; 2613 return (0); 2614} 2615 2616/* 2617 * Strategy routine. 2618 * For async requests when nfsiod(s) are running, queue the request by 2619 * calling nfs_asyncio(), otherwise just all nfs_doio() to do the 2620 * request. 2621 */ 2622int 2623nfs_strategy(ap) 2624 struct vop_strategy_args *ap; 2625{ 2626 register struct buf *bp = ap->a_bp; 2627 struct ucred *cr; 2628 struct proc *p; 2629 int error = 0; 2630 2631 if (bp->b_flags & B_PHYS) 2632 panic("nfs physio"); 2633 if (bp->b_flags & B_ASYNC) 2634 p = (struct proc *)0; 2635 else 2636 p = curproc; /* XXX */ 2637 if (bp->b_flags & B_READ) 2638 cr = bp->b_rcred; 2639 else 2640 cr = bp->b_wcred; 2641 /* 2642 * If the op is asynchronous and an i/o daemon is waiting 2643 * queue the request, wake it up and wait for completion 2644 * otherwise just do it ourselves. 2645 */ 2646 if ((bp->b_flags & B_ASYNC) == 0 || 2647 nfs_asyncio(bp, NOCRED)) 2648 error = nfs_doio(bp, cr, p); 2649 return (error); 2650} 2651 2652/* 2653 * Mmap a file 2654 * 2655 * NB Currently unsupported. 2656 */ 2657/* ARGSUSED */ 2658int 2659nfs_mmap(ap) 2660 struct vop_mmap_args /* { 2661 struct vnode *a_vp; 2662 int a_fflags; 2663 struct ucred *a_cred; 2664 struct proc *a_p; 2665 } */ *ap; 2666{ 2667 2668 return (EINVAL); 2669} 2670 2671/* 2672 * fsync vnode op. Just call nfs_flush() with commit == 1. 2673 */ 2674/* ARGSUSED */ 2675int 2676nfs_fsync(ap) 2677 struct vop_fsync_args /* { 2678 struct vnodeop_desc *a_desc; 2679 struct vnode * a_vp; 2680 struct ucred * a_cred; 2681 int a_waitfor; 2682 struct proc * a_p; 2683 } */ *ap; 2684{ 2685 2686 return (nfs_flush(ap->a_vp, ap->a_cred, ap->a_waitfor, ap->a_p, 1)); 2687} 2688 2689/* 2690 * Flush all the blocks associated with a vnode. 2691 * Walk through the buffer pool and push any dirty pages 2692 * associated with the vnode. 2693 */ 2694int 2695nfs_flush(vp, cred, waitfor, p, commit) 2696 register struct vnode *vp; 2697 struct ucred *cred; 2698 int waitfor; 2699 struct proc *p; 2700 int commit; 2701{ 2702 register struct nfsnode *np = VTONFS(vp); 2703 register struct buf *bp; 2704 register int i; 2705 struct buf *nbp; 2706 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2707 int s, error = 0, slptimeo = 0, slpflag = 0, retv, bvecpos; 2708 int passone = 1; 2709 u_quad_t off = (u_quad_t)-1, endoff = 0, toff; 2710 struct ucred* wcred = NULL; 2711#ifndef NFS_COMMITBVECSIZ 2712#define NFS_COMMITBVECSIZ 20 2713#endif 2714 struct buf *bvec[NFS_COMMITBVECSIZ]; 2715 2716 if (nmp->nm_flag & NFSMNT_INT) 2717 slpflag = PCATCH; 2718 if (!commit) 2719 passone = 0; 2720 /* 2721 * A b_flags == (B_DELWRI | B_NEEDCOMMIT) block has been written to the 2722 * server, but nas not been committed to stable storage on the server 2723 * yet. On the first pass, the byte range is worked out and the commit 2724 * rpc is done. On the second pass, nfs_writebp() is called to do the 2725 * job. 2726 */ 2727again: 2728 bvecpos = 0; 2729 if (NFS_ISV3(vp) && commit) { 2730 s = splbio(); 2731 for (bp = vp->v_dirtyblkhd.lh_first; bp; bp = nbp) { 2732 nbp = bp->b_vnbufs.le_next; 2733 if (bvecpos >= NFS_COMMITBVECSIZ) 2734 break; 2735 if ((bp->b_flags & (B_BUSY | B_DELWRI | B_NEEDCOMMIT)) 2736 != (B_DELWRI | B_NEEDCOMMIT)) 2737 continue; 2738 bremfree(bp); 2739 /* 2740 * Work out if all buffers are using the same cred 2741 * so we can deal with them all with one commit. 2742 */ 2743 if (wcred == NULL) 2744 wcred = bp->b_wcred; 2745 else if (wcred != bp->b_wcred) 2746 wcred = NOCRED; 2747 bp->b_flags |= (B_BUSY | B_WRITEINPROG); 2748 vfs_busy_pages(bp, 1); 2749 /* 2750 * A list of these buffers is kept so that the 2751 * second loop knows which buffers have actually 2752 * been committed. This is necessary, since there 2753 * may be a race between the commit rpc and new 2754 * uncommitted writes on the file. 2755 */ 2756 bvec[bvecpos++] = bp; 2757 toff = ((u_quad_t)bp->b_blkno) * DEV_BSIZE + 2758 bp->b_dirtyoff; 2759 if (toff < off) 2760 off = toff; 2761 toff += (u_quad_t)(bp->b_dirtyend - bp->b_dirtyoff); 2762 if (toff > endoff) 2763 endoff = toff; 2764 } 2765 splx(s); 2766 } 2767 if (bvecpos > 0) { 2768 /* 2769 * Commit data on the server, as required. 2770 * If all bufs are using the same wcred, then use that with 2771 * one call for all of them, otherwise commit each one 2772 * separately. 2773 */ 2774 if (wcred != NOCRED) 2775 retv = nfs_commit(vp, off, (int)(endoff - off), 2776 wcred, p); 2777 else { 2778 retv = 0; 2779 for (i = 0; i < bvecpos; i++) { 2780 off_t off, size; 2781 bp = bvec[i]; 2782 off = ((u_quad_t)bp->b_blkno) * DEV_BSIZE + 2783 bp->b_dirtyoff; 2784 size = (u_quad_t)(bp->b_dirtyend 2785 - bp->b_dirtyoff); 2786 retv = nfs_commit(vp, off, (int)size, 2787 bp->b_wcred, p); 2788 if (retv) break; 2789 } 2790 } 2791 2792 if (retv == NFSERR_STALEWRITEVERF) 2793 nfs_clearcommit(vp->v_mount); 2794 /* 2795 * Now, either mark the blocks I/O done or mark the 2796 * blocks dirty, depending on whether the commit 2797 * succeeded. 2798 */ 2799 for (i = 0; i < bvecpos; i++) { 2800 bp = bvec[i]; 2801 bp->b_flags &= ~(B_NEEDCOMMIT | B_WRITEINPROG); 2802 if (retv) { 2803 brelse(bp); 2804 vfs_unbusy_pages(bp); 2805 } else { 2806 vp->v_numoutput++; 2807 bp->b_flags |= B_ASYNC; 2808 bp->b_flags &= ~(B_READ|B_DONE|B_ERROR|B_DELWRI); 2809 bp->b_dirtyoff = bp->b_dirtyend = 0; 2810 reassignbuf(bp, vp); 2811 biodone(bp); 2812 } 2813 } 2814 } 2815 2816 /* 2817 * Start/do any write(s) that are required. 2818 */ 2819loop: 2820 s = splbio(); 2821 for (bp = vp->v_dirtyblkhd.lh_first; bp; bp = nbp) { 2822 nbp = bp->b_vnbufs.le_next; 2823 if (bp->b_flags & B_BUSY) { 2824 if (waitfor != MNT_WAIT || passone) 2825 continue; 2826 bp->b_flags |= B_WANTED; 2827 error = tsleep((caddr_t)bp, slpflag | (PRIBIO + 1), 2828 "nfsfsync", slptimeo); 2829 splx(s); 2830 if (error) { 2831 if (nfs_sigintr(nmp, (struct nfsreq *)0, p)) 2832 return (EINTR); 2833 if (slpflag == PCATCH) { 2834 slpflag = 0; 2835 slptimeo = 2 * hz; 2836 } 2837 } 2838 goto loop; 2839 } 2840 if ((bp->b_flags & B_DELWRI) == 0) 2841 panic("nfs_fsync: not dirty"); 2842 if ((passone || !commit) && (bp->b_flags & B_NEEDCOMMIT)) 2843 continue; 2844 bremfree(bp); 2845 if (passone || !commit) 2846 bp->b_flags |= (B_BUSY|B_ASYNC); 2847 else 2848 bp->b_flags |= (B_BUSY|B_ASYNC|B_WRITEINPROG|B_NEEDCOMMIT); 2849 splx(s); 2850 VOP_BWRITE(bp); 2851 goto loop; 2852 } 2853 splx(s); 2854 if (passone) { 2855 passone = 0; 2856 goto again; 2857 } 2858 if (waitfor == MNT_WAIT) { 2859 while (vp->v_numoutput) { 2860 vp->v_flag |= VBWAIT; 2861 error = tsleep((caddr_t)&vp->v_numoutput, 2862 slpflag | (PRIBIO + 1), "nfsfsync", slptimeo); 2863 if (error) { 2864 if (nfs_sigintr(nmp, (struct nfsreq *)0, p)) 2865 return (EINTR); 2866 if (slpflag == PCATCH) { 2867 slpflag = 0; 2868 slptimeo = 2 * hz; 2869 } 2870 } 2871 } 2872 if (vp->v_dirtyblkhd.lh_first && commit) { 2873 goto loop; 2874 } 2875 } 2876 if (np->n_flag & NWRITEERR) { 2877 error = np->n_error; 2878 np->n_flag &= ~NWRITEERR; 2879 } 2880 return (error); 2881} 2882 2883/* 2884 * Return POSIX pathconf information applicable to nfs. 2885 * 2886 * The NFS V2 protocol doesn't support this, so just return EINVAL 2887 * for V2. 2888 */ 2889/* ARGSUSED */ 2890int 2891nfs_pathconf(ap) 2892 struct vop_pathconf_args /* { 2893 struct vnode *a_vp; 2894 int a_name; 2895 int *a_retval; 2896 } */ *ap; 2897{ 2898 2899 return (EINVAL); 2900} 2901 2902/* 2903 * NFS advisory byte-level locks. 2904 * Currently unsupported. 2905 */ 2906int 2907nfs_advlock(ap) 2908 struct vop_advlock_args /* { 2909 struct vnode *a_vp; 2910 caddr_t a_id; 2911 int a_op; 2912 struct flock *a_fl; 2913 int a_flags; 2914 } */ *ap; 2915{ 2916#ifdef __FreeBSD__ 2917 register struct nfsnode *np = VTONFS(ap->a_vp); 2918 2919 /* 2920 * The following kludge is to allow diskless support to work 2921 * until a real NFS lockd is implemented. Basically, just pretend 2922 * that this is a local lock. 2923 */ 2924 return (lf_advlock(ap, &(np->n_lockf), np->n_size)); 2925#else 2926 return (EOPNOTSUPP); 2927#endif 2928} 2929 2930/* 2931 * Print out the contents of an nfsnode. 2932 */ 2933int 2934nfs_print(ap) 2935 struct vop_print_args /* { 2936 struct vnode *a_vp; 2937 } */ *ap; 2938{ 2939 register struct vnode *vp = ap->a_vp; 2940 register struct nfsnode *np = VTONFS(vp); 2941 2942 printf("tag VT_NFS, fileid %ld fsid 0x%lx", 2943 np->n_vattr.va_fileid, np->n_vattr.va_fsid); 2944 if (vp->v_type == VFIFO) 2945 fifo_printinfo(vp); 2946 printf("\n"); 2947 return (0); 2948} 2949 2950/* 2951 * NFS directory offset lookup. 2952 * Currently unsupported. 2953 */ 2954int 2955nfs_blkatoff(ap) 2956 struct vop_blkatoff_args /* { 2957 struct vnode *a_vp; 2958 off_t a_offset; 2959 char **a_res; 2960 struct buf **a_bpp; 2961 } */ *ap; 2962{ 2963 2964 return (EOPNOTSUPP); 2965} 2966 2967/* 2968 * NFS flat namespace allocation. 2969 * Currently unsupported. 2970 */ 2971int 2972nfs_valloc(ap) 2973 struct vop_valloc_args /* { 2974 struct vnode *a_pvp; 2975 int a_mode; 2976 struct ucred *a_cred; 2977 struct vnode **a_vpp; 2978 } */ *ap; 2979{ 2980 2981 return (EOPNOTSUPP); 2982} 2983 2984/* 2985 * NFS flat namespace free. 2986 * Currently unsupported. 2987 */ 2988int 2989nfs_vfree(ap) 2990 struct vop_vfree_args /* { 2991 struct vnode *a_pvp; 2992 ino_t a_ino; 2993 int a_mode; 2994 } */ *ap; 2995{ 2996 2997 return (EOPNOTSUPP); 2998} 2999 3000/* 3001 * NFS file truncation. 3002 */ 3003int 3004nfs_truncate(ap) 3005 struct vop_truncate_args /* { 3006 struct vnode *a_vp; 3007 off_t a_length; 3008 int a_flags; 3009 struct ucred *a_cred; 3010 struct proc *a_p; 3011 } */ *ap; 3012{ 3013 3014 /* Use nfs_setattr */ 3015 printf("nfs_truncate: need to implement!!"); 3016 return (EOPNOTSUPP); 3017} 3018 3019/* 3020 * NFS update. 3021 */ 3022int 3023nfs_update(ap) 3024 struct vop_update_args /* { 3025 struct vnode *a_vp; 3026 struct timeval *a_ta; 3027 struct timeval *a_tm; 3028 int a_waitfor; 3029 } */ *ap; 3030{ 3031 3032#if 0 3033 /* Use nfs_setattr */ 3034 printf("nfs_update: need to implement!!"); 3035#endif 3036 return (EOPNOTSUPP); 3037} 3038 3039/* 3040 * Just call nfs_writebp() with the force argument set to 1. 3041 */ 3042int 3043nfs_bwrite(ap) 3044 struct vop_bwrite_args /* { 3045 struct vnode *a_bp; 3046 } */ *ap; 3047{ 3048 3049 return (nfs_writebp(ap->a_bp, 1)); 3050} 3051 3052/* 3053 * This is a clone of vn_bwrite(), except that B_WRITEINPROG isn't set unless 3054 * the force flag is one and it also handles the B_NEEDCOMMIT flag. 3055 */ 3056int 3057nfs_writebp(bp, force) 3058 register struct buf *bp; 3059 int force; 3060{ 3061 register int oldflags = bp->b_flags, retv = 1; 3062 off_t off; 3063 3064 if(!(bp->b_flags & B_BUSY)) 3065 panic("bwrite: buffer is not busy???"); 3066 3067 bp->b_flags &= ~(B_READ|B_DONE|B_ERROR|B_DELWRI); 3068 3069 if ((oldflags & (B_ASYNC|B_DELWRI)) == (B_ASYNC|B_DELWRI)) { 3070 reassignbuf(bp, bp->b_vp); 3071 } 3072 3073 bp->b_vp->v_numoutput++; 3074 curproc->p_stats->p_ru.ru_oublock++; 3075 3076 /* 3077 * If B_NEEDCOMMIT is set, a commit rpc may do the trick. If not 3078 * an actual write will have to be scheduled via. VOP_STRATEGY(). 3079 * If B_WRITEINPROG is already set, then push it with a write anyhow. 3080 */ 3081 if (oldflags & (B_NEEDCOMMIT | B_WRITEINPROG) == B_NEEDCOMMIT) { 3082 off = ((u_quad_t)bp->b_blkno) * DEV_BSIZE + bp->b_dirtyoff; 3083 bp->b_flags |= B_WRITEINPROG; 3084 retv = nfs_commit(bp->b_vp, off, bp->b_dirtyend-bp->b_dirtyoff, 3085 bp->b_wcred, bp->b_proc); 3086 bp->b_flags &= ~B_WRITEINPROG; 3087 if (!retv) { 3088 bp->b_dirtyoff = bp->b_dirtyend = 0; 3089 bp->b_flags &= ~B_NEEDCOMMIT; 3090 biodone(bp); 3091 } else if (retv == NFSERR_STALEWRITEVERF) 3092 nfs_clearcommit(bp->b_vp->v_mount); 3093 } 3094 if (retv) { 3095 if (force) 3096 bp->b_flags |= B_WRITEINPROG; 3097 vfs_busy_pages(bp, 1); 3098 VOP_STRATEGY(bp); 3099 } 3100 3101 if( (oldflags & B_ASYNC) == 0) { 3102 int rtval = biowait(bp); 3103 3104 if (oldflags & B_DELWRI) { 3105 reassignbuf(bp, bp->b_vp); 3106 } 3107 brelse(bp); 3108 return (rtval); 3109 } 3110 3111 return (0); 3112} 3113 3114/* 3115 * nfs special file access vnode op. 3116 * Essentially just get vattr and then imitate iaccess() since the device is 3117 * local to the client. 3118 */ 3119int 3120nfsspec_access(ap) 3121 struct vop_access_args /* { 3122 struct vnode *a_vp; 3123 int a_mode; 3124 struct ucred *a_cred; 3125 struct proc *a_p; 3126 } */ *ap; 3127{ 3128 register struct vattr *vap; 3129 register gid_t *gp; 3130 register struct ucred *cred = ap->a_cred; 3131 mode_t mode = ap->a_mode; 3132 struct vattr vattr; 3133 register int i; 3134 int error; 3135 3136 /* 3137 * If you're the super-user, 3138 * you always get access. 3139 */ 3140 if (cred->cr_uid == 0) 3141 return (0); 3142 vap = &vattr; 3143 error = VOP_GETATTR(ap->a_vp, vap, cred, ap->a_p); 3144 if (error) 3145 return (error); 3146 /* 3147 * Access check is based on only one of owner, group, public. 3148 * If not owner, then check group. If not a member of the 3149 * group, then check public access. 3150 */ 3151 if (cred->cr_uid != vap->va_uid) { 3152 mode >>= 3; 3153 gp = cred->cr_groups; 3154 for (i = 0; i < cred->cr_ngroups; i++, gp++) 3155 if (vap->va_gid == *gp) 3156 goto found; 3157 mode >>= 3; 3158found: 3159 ; 3160 } 3161 error = (vap->va_mode & mode) == mode ? 0 : EACCES; 3162 return (error); 3163} 3164 3165/* 3166 * Read wrapper for special devices. 3167 */ 3168int 3169nfsspec_read(ap) 3170 struct vop_read_args /* { 3171 struct vnode *a_vp; 3172 struct uio *a_uio; 3173 int a_ioflag; 3174 struct ucred *a_cred; 3175 } */ *ap; 3176{ 3177 register struct nfsnode *np = VTONFS(ap->a_vp); 3178 3179 /* 3180 * Set access flag. 3181 */ 3182 np->n_flag |= NACC; 3183 np->n_atim.ts_sec = time.tv_sec; 3184 np->n_atim.ts_nsec = time.tv_usec * 1000; 3185 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_read), ap)); 3186} 3187 3188/* 3189 * Write wrapper for special devices. 3190 */ 3191int 3192nfsspec_write(ap) 3193 struct vop_write_args /* { 3194 struct vnode *a_vp; 3195 struct uio *a_uio; 3196 int a_ioflag; 3197 struct ucred *a_cred; 3198 } */ *ap; 3199{ 3200 register struct nfsnode *np = VTONFS(ap->a_vp); 3201 3202 /* 3203 * Set update flag. 3204 */ 3205 np->n_flag |= NUPD; 3206 np->n_mtim.ts_sec = time.tv_sec; 3207 np->n_mtim.ts_nsec = time.tv_usec * 1000; 3208 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_write), ap)); 3209} 3210 3211/* 3212 * Close wrapper for special devices. 3213 * 3214 * Update the times on the nfsnode then do device close. 3215 */ 3216int 3217nfsspec_close(ap) 3218 struct vop_close_args /* { 3219 struct vnode *a_vp; 3220 int a_fflag; 3221 struct ucred *a_cred; 3222 struct proc *a_p; 3223 } */ *ap; 3224{ 3225 register struct vnode *vp = ap->a_vp; 3226 register struct nfsnode *np = VTONFS(vp); 3227 struct vattr vattr; 3228 3229 if (np->n_flag & (NACC | NUPD)) { 3230 np->n_flag |= NCHG; 3231 if (vp->v_usecount == 1 && 3232 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3233 VATTR_NULL(&vattr); 3234 if (np->n_flag & NACC) 3235 vattr.va_atime = np->n_atim; 3236 if (np->n_flag & NUPD) 3237 vattr.va_mtime = np->n_mtim; 3238 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p); 3239 } 3240 } 3241 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_close), ap)); 3242} 3243 3244/* 3245 * Read wrapper for fifos. 3246 */ 3247int 3248nfsfifo_read(ap) 3249 struct vop_read_args /* { 3250 struct vnode *a_vp; 3251 struct uio *a_uio; 3252 int a_ioflag; 3253 struct ucred *a_cred; 3254 } */ *ap; 3255{ 3256 register struct nfsnode *np = VTONFS(ap->a_vp); 3257 3258 /* 3259 * Set access flag. 3260 */ 3261 np->n_flag |= NACC; 3262 np->n_atim.ts_sec = time.tv_sec; 3263 np->n_atim.ts_nsec = time.tv_usec * 1000; 3264 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), ap)); 3265} 3266 3267/* 3268 * Write wrapper for fifos. 3269 */ 3270int 3271nfsfifo_write(ap) 3272 struct vop_write_args /* { 3273 struct vnode *a_vp; 3274 struct uio *a_uio; 3275 int a_ioflag; 3276 struct ucred *a_cred; 3277 } */ *ap; 3278{ 3279 register struct nfsnode *np = VTONFS(ap->a_vp); 3280 3281 /* 3282 * Set update flag. 3283 */ 3284 np->n_flag |= NUPD; 3285 np->n_mtim.ts_sec = time.tv_sec; 3286 np->n_mtim.ts_nsec = time.tv_usec * 1000; 3287 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), ap)); 3288} 3289 3290/* 3291 * Close wrapper for fifos. 3292 * 3293 * Update the times on the nfsnode then do fifo close. 3294 */ 3295int 3296nfsfifo_close(ap) 3297 struct vop_close_args /* { 3298 struct vnode *a_vp; 3299 int a_fflag; 3300 struct ucred *a_cred; 3301 struct proc *a_p; 3302 } */ *ap; 3303{ 3304 register struct vnode *vp = ap->a_vp; 3305 register struct nfsnode *np = VTONFS(vp); 3306 struct vattr vattr; 3307 3308 if (np->n_flag & (NACC | NUPD)) { 3309 if (np->n_flag & NACC) { 3310 np->n_atim.ts_sec = time.tv_sec; 3311 np->n_atim.ts_nsec = time.tv_usec * 1000; 3312 } 3313 if (np->n_flag & NUPD) { 3314 np->n_mtim.ts_sec = time.tv_sec; 3315 np->n_mtim.ts_nsec = time.tv_usec * 1000; 3316 } 3317 np->n_flag |= NCHG; 3318 if (vp->v_usecount == 1 && 3319 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3320 VATTR_NULL(&vattr); 3321 if (np->n_flag & NACC) 3322 vattr.va_atime = np->n_atim; 3323 if (np->n_flag & NUPD) 3324 vattr.va_mtime = np->n_mtim; 3325 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p); 3326 } 3327 } 3328 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_close), ap)); 3329} 3330