nfs_vnops.c revision 1.130.2.11
1 /* $NetBSD: nfs_vnops.c,v 1.130.2.11 2002/06/24 22:12:12 nathanw Exp $ */ 2 3 /* 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Rick Macklem at The University of Guelph. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)nfs_vnops.c 8.19 (Berkeley) 7/31/95 39 */ 40 41 /* 42 * vnode op calls for Sun NFS version 2 and 3 43 */ 44 45 #include <sys/cdefs.h> 46 __KERNEL_RCSID(0, "$NetBSD: nfs_vnops.c,v 1.130.2.11 2002/06/24 22:12:12 nathanw Exp $"); 47 48 #include "opt_nfs.h" 49 #include "opt_uvmhist.h" 50 51 #include <sys/param.h> 52 #include <sys/lwp.h> 53 #include <sys/proc.h> 54 #include <sys/kernel.h> 55 #include <sys/systm.h> 56 #include <sys/resourcevar.h> 57 #include <sys/proc.h> 58 #include <sys/mount.h> 59 #include <sys/buf.h> 60 #include <sys/malloc.h> 61 #include <sys/mbuf.h> 62 #include <sys/namei.h> 63 #include <sys/vnode.h> 64 #include <sys/dirent.h> 65 #include <sys/fcntl.h> 66 #include <sys/hash.h> 67 #include <sys/lockf.h> 68 #include <sys/stat.h> 69 #include <sys/unistd.h> 70 71 #include <uvm/uvm_extern.h> 72 #include <uvm/uvm.h> 73 74 #include <miscfs/fifofs/fifo.h> 75 #include <miscfs/genfs/genfs.h> 76 #include <miscfs/specfs/specdev.h> 77 78 #include <nfs/rpcv2.h> 79 #include <nfs/nfsproto.h> 80 #include <nfs/nfs.h> 81 #include <nfs/nfsnode.h> 82 #include <nfs/nfsmount.h> 83 #include <nfs/xdr_subs.h> 84 #include <nfs/nfsm_subs.h> 85 #include <nfs/nqnfs.h> 86 #include <nfs/nfs_var.h> 87 88 #include <net/if.h> 89 #include <netinet/in.h> 90 #include <netinet/in_var.h> 91 92 /* Defs */ 93 #define TRUE 1 94 #define FALSE 0 95 96 /* 97 * Global vfs data structures for nfs 98 */ 99 int (**nfsv2_vnodeop_p) __P((void *)); 100 const struct vnodeopv_entry_desc nfsv2_vnodeop_entries[] = { 101 { &vop_default_desc, vn_default_error }, 102 { &vop_lookup_desc, nfs_lookup }, /* lookup */ 103 { &vop_create_desc, nfs_create }, /* create */ 104 { &vop_mknod_desc, nfs_mknod }, /* mknod */ 105 { &vop_open_desc, nfs_open }, /* open */ 106 { &vop_close_desc, nfs_close }, /* close */ 107 { &vop_access_desc, nfs_access }, /* access */ 108 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 109 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 110 { &vop_read_desc, nfs_read }, /* read */ 111 { &vop_write_desc, nfs_write }, /* write */ 112 { &vop_lease_desc, nfs_lease_check }, /* lease */ 113 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 114 { &vop_ioctl_desc, nfs_ioctl }, /* ioctl */ 115 { &vop_poll_desc, nfs_poll }, /* poll */ 116 { &vop_revoke_desc, nfs_revoke }, /* revoke */ 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 }, /* bwrite */ 146 { &vop_getpages_desc, nfs_getpages }, /* getpages */ 147 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 148 { NULL, NULL } 149 }; 150 const struct vnodeopv_desc nfsv2_vnodeop_opv_desc = 151 { &nfsv2_vnodeop_p, nfsv2_vnodeop_entries }; 152 153 /* 154 * Special device vnode ops 155 */ 156 int (**spec_nfsv2nodeop_p) __P((void *)); 157 const struct vnodeopv_entry_desc spec_nfsv2nodeop_entries[] = { 158 { &vop_default_desc, vn_default_error }, 159 { &vop_lookup_desc, spec_lookup }, /* lookup */ 160 { &vop_create_desc, spec_create }, /* create */ 161 { &vop_mknod_desc, spec_mknod }, /* mknod */ 162 { &vop_open_desc, spec_open }, /* open */ 163 { &vop_close_desc, nfsspec_close }, /* close */ 164 { &vop_access_desc, nfsspec_access }, /* access */ 165 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 166 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 167 { &vop_read_desc, nfsspec_read }, /* read */ 168 { &vop_write_desc, nfsspec_write }, /* write */ 169 { &vop_lease_desc, spec_lease_check }, /* lease */ 170 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 171 { &vop_ioctl_desc, spec_ioctl }, /* ioctl */ 172 { &vop_poll_desc, spec_poll }, /* poll */ 173 { &vop_revoke_desc, spec_revoke }, /* revoke */ 174 { &vop_mmap_desc, spec_mmap }, /* mmap */ 175 { &vop_fsync_desc, spec_fsync }, /* fsync */ 176 { &vop_seek_desc, spec_seek }, /* seek */ 177 { &vop_remove_desc, spec_remove }, /* remove */ 178 { &vop_link_desc, spec_link }, /* link */ 179 { &vop_rename_desc, spec_rename }, /* rename */ 180 { &vop_mkdir_desc, spec_mkdir }, /* mkdir */ 181 { &vop_rmdir_desc, spec_rmdir }, /* rmdir */ 182 { &vop_symlink_desc, spec_symlink }, /* symlink */ 183 { &vop_readdir_desc, spec_readdir }, /* readdir */ 184 { &vop_readlink_desc, spec_readlink }, /* readlink */ 185 { &vop_abortop_desc, spec_abortop }, /* abortop */ 186 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 187 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 188 { &vop_lock_desc, nfs_lock }, /* lock */ 189 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 190 { &vop_bmap_desc, spec_bmap }, /* bmap */ 191 { &vop_strategy_desc, spec_strategy }, /* strategy */ 192 { &vop_print_desc, nfs_print }, /* print */ 193 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 194 { &vop_pathconf_desc, spec_pathconf }, /* pathconf */ 195 { &vop_advlock_desc, spec_advlock }, /* advlock */ 196 { &vop_blkatoff_desc, spec_blkatoff }, /* blkatoff */ 197 { &vop_valloc_desc, spec_valloc }, /* valloc */ 198 { &vop_reallocblks_desc, spec_reallocblks }, /* reallocblks */ 199 { &vop_vfree_desc, spec_vfree }, /* vfree */ 200 { &vop_truncate_desc, spec_truncate }, /* truncate */ 201 { &vop_update_desc, nfs_update }, /* update */ 202 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 203 { &vop_getpages_desc, spec_getpages }, /* getpages */ 204 { &vop_putpages_desc, spec_putpages }, /* putpages */ 205 { NULL, NULL } 206 }; 207 const struct vnodeopv_desc spec_nfsv2nodeop_opv_desc = 208 { &spec_nfsv2nodeop_p, spec_nfsv2nodeop_entries }; 209 210 int (**fifo_nfsv2nodeop_p) __P((void *)); 211 const struct vnodeopv_entry_desc fifo_nfsv2nodeop_entries[] = { 212 { &vop_default_desc, vn_default_error }, 213 { &vop_lookup_desc, fifo_lookup }, /* lookup */ 214 { &vop_create_desc, fifo_create }, /* create */ 215 { &vop_mknod_desc, fifo_mknod }, /* mknod */ 216 { &vop_open_desc, fifo_open }, /* open */ 217 { &vop_close_desc, nfsfifo_close }, /* close */ 218 { &vop_access_desc, nfsspec_access }, /* access */ 219 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 220 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 221 { &vop_read_desc, nfsfifo_read }, /* read */ 222 { &vop_write_desc, nfsfifo_write }, /* write */ 223 { &vop_lease_desc, fifo_lease_check }, /* lease */ 224 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 225 { &vop_ioctl_desc, fifo_ioctl }, /* ioctl */ 226 { &vop_poll_desc, fifo_poll }, /* poll */ 227 { &vop_revoke_desc, fifo_revoke }, /* revoke */ 228 { &vop_mmap_desc, fifo_mmap }, /* mmap */ 229 { &vop_fsync_desc, nfs_fsync }, /* fsync */ 230 { &vop_seek_desc, fifo_seek }, /* seek */ 231 { &vop_remove_desc, fifo_remove }, /* remove */ 232 { &vop_link_desc, fifo_link }, /* link */ 233 { &vop_rename_desc, fifo_rename }, /* rename */ 234 { &vop_mkdir_desc, fifo_mkdir }, /* mkdir */ 235 { &vop_rmdir_desc, fifo_rmdir }, /* rmdir */ 236 { &vop_symlink_desc, fifo_symlink }, /* symlink */ 237 { &vop_readdir_desc, fifo_readdir }, /* readdir */ 238 { &vop_readlink_desc, fifo_readlink }, /* readlink */ 239 { &vop_abortop_desc, fifo_abortop }, /* abortop */ 240 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 241 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 242 { &vop_lock_desc, nfs_lock }, /* lock */ 243 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 244 { &vop_bmap_desc, fifo_bmap }, /* bmap */ 245 { &vop_strategy_desc, genfs_badop }, /* strategy */ 246 { &vop_print_desc, nfs_print }, /* print */ 247 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 248 { &vop_pathconf_desc, fifo_pathconf }, /* pathconf */ 249 { &vop_advlock_desc, fifo_advlock }, /* advlock */ 250 { &vop_blkatoff_desc, fifo_blkatoff }, /* blkatoff */ 251 { &vop_valloc_desc, fifo_valloc }, /* valloc */ 252 { &vop_reallocblks_desc, fifo_reallocblks }, /* reallocblks */ 253 { &vop_vfree_desc, fifo_vfree }, /* vfree */ 254 { &vop_truncate_desc, fifo_truncate }, /* truncate */ 255 { &vop_update_desc, nfs_update }, /* update */ 256 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 257 { &vop_putpages_desc, fifo_putpages }, /* putpages */ 258 { NULL, NULL } 259 }; 260 const struct vnodeopv_desc fifo_nfsv2nodeop_opv_desc = 261 { &fifo_nfsv2nodeop_p, fifo_nfsv2nodeop_entries }; 262 263 /* 264 * Global variables 265 */ 266 extern u_int32_t nfs_true, nfs_false; 267 extern u_int32_t nfs_xdrneg1; 268 extern nfstype nfsv3_type[9]; 269 270 struct proc *nfs_iodwant[NFS_MAXASYNCDAEMON]; 271 struct nfsmount *nfs_iodmount[NFS_MAXASYNCDAEMON]; 272 int nfs_numasync = 0; 273 #define DIRHDSIZ (sizeof (struct dirent) - (MAXNAMLEN + 1)) 274 275 /* 276 * nfs null call from vfs. 277 */ 278 int 279 nfs_null(vp, cred, procp) 280 struct vnode *vp; 281 struct ucred *cred; 282 struct proc *procp; 283 { 284 caddr_t bpos, dpos; 285 int error = 0; 286 struct mbuf *mreq, *mrep, *md, *mb; 287 288 nfsm_reqhead(vp, NFSPROC_NULL, 0); 289 nfsm_request(vp, NFSPROC_NULL, procp, cred); 290 nfsm_reqdone; 291 return (error); 292 } 293 294 /* 295 * nfs access vnode op. 296 * For nfs version 2, just return ok. File accesses may fail later. 297 * For nfs version 3, use the access rpc to check accessibility. If file modes 298 * are changed on the server, accesses might still fail later. 299 */ 300 int 301 nfs_access(v) 302 void *v; 303 { 304 struct vop_access_args /* { 305 struct vnode *a_vp; 306 int a_mode; 307 struct ucred *a_cred; 308 struct proc *a_p; 309 } */ *ap = v; 310 struct vnode *vp = ap->a_vp; 311 u_int32_t *tl; 312 caddr_t cp; 313 int32_t t1, t2; 314 caddr_t bpos, dpos, cp2; 315 int error = 0, attrflag, cachevalid; 316 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 317 u_int32_t mode, rmode; 318 const int v3 = NFS_ISV3(vp); 319 struct nfsnode *np = VTONFS(vp); 320 321 cachevalid = (np->n_accstamp != -1 && 322 (time.tv_sec - np->n_accstamp) < NFS_ATTRTIMEO(np) && 323 np->n_accuid == ap->a_cred->cr_uid); 324 325 /* 326 * Check access cache first. If this request has been made for this 327 * uid shortly before, use the cached result. 328 */ 329 if (cachevalid) { 330 if (!np->n_accerror) { 331 if ((np->n_accmode & ap->a_mode) == ap->a_mode) 332 return np->n_accerror; 333 } else if ((np->n_accmode & ap->a_mode) == np->n_accmode) 334 return np->n_accerror; 335 } 336 337 /* 338 * For nfs v3, do an access rpc, otherwise you are stuck emulating 339 * ufs_access() locally using the vattr. This may not be correct, 340 * since the server may apply other access criteria such as 341 * client uid-->server uid mapping that we do not know about, but 342 * this is better than just returning anything that is lying about 343 * in the cache. 344 */ 345 if (v3) { 346 nfsstats.rpccnt[NFSPROC_ACCESS]++; 347 nfsm_reqhead(vp, NFSPROC_ACCESS, NFSX_FH(v3) + NFSX_UNSIGNED); 348 nfsm_fhtom(vp, v3); 349 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 350 if (ap->a_mode & VREAD) 351 mode = NFSV3ACCESS_READ; 352 else 353 mode = 0; 354 if (vp->v_type != VDIR) { 355 if (ap->a_mode & VWRITE) 356 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND); 357 if (ap->a_mode & VEXEC) 358 mode |= NFSV3ACCESS_EXECUTE; 359 } else { 360 if (ap->a_mode & VWRITE) 361 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | 362 NFSV3ACCESS_DELETE); 363 if (ap->a_mode & VEXEC) 364 mode |= NFSV3ACCESS_LOOKUP; 365 } 366 *tl = txdr_unsigned(mode); 367 nfsm_request(vp, NFSPROC_ACCESS, ap->a_p, ap->a_cred); 368 nfsm_postop_attr(vp, attrflag); 369 if (!error) { 370 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 371 rmode = fxdr_unsigned(u_int32_t, *tl); 372 /* 373 * The NFS V3 spec does not clarify whether or not 374 * the returned access bits can be a superset of 375 * the ones requested, so... 376 */ 377 if ((rmode & mode) != mode) 378 error = EACCES; 379 } 380 nfsm_reqdone; 381 } else 382 return (nfsspec_access(ap)); 383 /* 384 * Disallow write attempts on filesystems mounted read-only; 385 * unless the file is a socket, fifo, or a block or character 386 * device resident on the filesystem. 387 */ 388 if (!error && (ap->a_mode & VWRITE) && 389 (vp->v_mount->mnt_flag & MNT_RDONLY)) { 390 switch (vp->v_type) { 391 case VREG: 392 case VDIR: 393 case VLNK: 394 error = EROFS; 395 default: 396 break; 397 } 398 } 399 400 if (!error || error == EACCES) { 401 /* 402 * If we got the same result as for a previous, 403 * different request, OR it in. Don't update 404 * the timestamp in that case. 405 */ 406 if (cachevalid && np->n_accstamp != -1 && 407 error == np->n_accerror) { 408 if (!error) 409 np->n_accmode |= ap->a_mode; 410 else if ((np->n_accmode & ap->a_mode) == ap->a_mode) 411 np->n_accmode = ap->a_mode; 412 } else { 413 np->n_accstamp = time.tv_sec; 414 np->n_accuid = ap->a_cred->cr_uid; 415 np->n_accmode = ap->a_mode; 416 np->n_accerror = error; 417 } 418 } 419 420 return (error); 421 } 422 423 /* 424 * nfs open vnode op 425 * Check to see if the type is ok 426 * and that deletion is not in progress. 427 * For paged in text files, you will need to flush the page cache 428 * if consistency is lost. 429 */ 430 /* ARGSUSED */ 431 int 432 nfs_open(v) 433 void *v; 434 { 435 struct vop_open_args /* { 436 struct vnode *a_vp; 437 int a_mode; 438 struct ucred *a_cred; 439 struct proc *a_p; 440 } */ *ap = v; 441 struct vnode *vp = ap->a_vp; 442 struct nfsnode *np = VTONFS(vp); 443 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 444 struct vattr vattr; 445 int error; 446 447 if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK) { 448 return (EACCES); 449 } 450 451 /* 452 * Initialize read and write creds here, for swapfiles 453 * and other paths that don't set the creds themselves. 454 */ 455 456 if (ap->a_mode & FREAD) { 457 if (np->n_rcred) { 458 crfree(np->n_rcred); 459 } 460 np->n_rcred = ap->a_cred; 461 crhold(np->n_rcred); 462 } 463 if (ap->a_mode & FWRITE) { 464 if (np->n_wcred) { 465 crfree(np->n_wcred); 466 } 467 np->n_wcred = ap->a_cred; 468 crhold(np->n_wcred); 469 } 470 471 #ifndef NFS_V2_ONLY 472 /* 473 * Get a valid lease. If cached data is stale, flush it. 474 */ 475 if (nmp->nm_flag & NFSMNT_NQNFS) { 476 if (NQNFS_CKINVALID(vp, np, ND_READ)) { 477 do { 478 error = nqnfs_getlease(vp, ND_READ, ap->a_cred, 479 ap->a_p); 480 } while (error == NQNFS_EXPIRED); 481 if (error) 482 return (error); 483 if (np->n_lrev != np->n_brev || 484 (np->n_flag & NQNFSNONCACHE)) { 485 if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 486 ap->a_p, 1)) == EINTR) 487 return (error); 488 np->n_brev = np->n_lrev; 489 } 490 } 491 } else 492 #endif 493 { 494 if (np->n_flag & NMODIFIED) { 495 if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 496 ap->a_p, 1)) == EINTR) 497 return (error); 498 np->n_attrstamp = 0; 499 if (vp->v_type == VDIR) { 500 nfs_invaldircache(vp, 0); 501 np->n_direofoffset = 0; 502 } 503 error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_p); 504 if (error) 505 return (error); 506 np->n_mtime = vattr.va_mtime.tv_sec; 507 } else { 508 error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_p); 509 if (error) 510 return (error); 511 if (np->n_mtime != vattr.va_mtime.tv_sec) { 512 if (vp->v_type == VDIR) { 513 nfs_invaldircache(vp, 0); 514 np->n_direofoffset = 0; 515 } 516 if ((error = nfs_vinvalbuf(vp, V_SAVE, 517 ap->a_cred, ap->a_p, 1)) == EINTR) 518 return (error); 519 np->n_mtime = vattr.va_mtime.tv_sec; 520 } 521 } 522 } 523 if ((nmp->nm_flag & NFSMNT_NQNFS) == 0) 524 np->n_attrstamp = 0; /* For Open/Close consistency */ 525 return (0); 526 } 527 528 /* 529 * nfs close vnode op 530 * What an NFS client should do upon close after writing is a debatable issue. 531 * Most NFS clients push delayed writes to the server upon close, basically for 532 * two reasons: 533 * 1 - So that any write errors may be reported back to the client process 534 * doing the close system call. By far the two most likely errors are 535 * NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure. 536 * 2 - To put a worst case upper bound on cache inconsistency between 537 * multiple clients for the file. 538 * There is also a consistency problem for Version 2 of the protocol w.r.t. 539 * not being able to tell if other clients are writing a file concurrently, 540 * since there is no way of knowing if the changed modify time in the reply 541 * is only due to the write for this client. 542 * (NFS Version 3 provides weak cache consistency data in the reply that 543 * should be sufficient to detect and handle this case.) 544 * 545 * The current code does the following: 546 * for NFS Version 2 - play it safe and flush/invalidate all dirty buffers 547 * for NFS Version 3 - flush dirty buffers to the server but don't invalidate 548 * or commit them (this satisfies 1 and 2 except for the 549 * case where the server crashes after this close but 550 * before the commit RPC, which is felt to be "good 551 * enough". Changing the last argument to nfs_flush() to 552 * a 1 would force a commit operation, if it is felt a 553 * commit is necessary now. 554 * for NQNFS - do nothing now, since 2 is dealt with via leases and 555 * 1 should be dealt with via an fsync() system call for 556 * cases where write errors are important. 557 */ 558 /* ARGSUSED */ 559 int 560 nfs_close(v) 561 void *v; 562 { 563 struct vop_close_args /* { 564 struct vnodeop_desc *a_desc; 565 struct vnode *a_vp; 566 int a_fflag; 567 struct ucred *a_cred; 568 struct proc *a_p; 569 } */ *ap = v; 570 struct vnode *vp = ap->a_vp; 571 struct nfsnode *np = VTONFS(vp); 572 int error = 0; 573 UVMHIST_FUNC("nfs_close"); UVMHIST_CALLED(ubchist); 574 575 if (vp->v_type == VREG) { 576 if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS) == 0 && 577 (np->n_flag & NMODIFIED)) { 578 if (NFS_ISV3(vp)) { 579 error = nfs_flush(vp, ap->a_cred, MNT_WAIT, ap->a_p, 0); 580 np->n_flag &= ~NMODIFIED; 581 } else 582 error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, ap->a_p, 1); 583 np->n_attrstamp = 0; 584 } 585 if (np->n_flag & NWRITEERR) { 586 np->n_flag &= ~NWRITEERR; 587 error = np->n_error; 588 } 589 } 590 UVMHIST_LOG(ubchist, "returning %d", error,0,0,0); 591 return (error); 592 } 593 594 /* 595 * nfs getattr call from vfs. 596 */ 597 int 598 nfs_getattr(v) 599 void *v; 600 { 601 struct vop_getattr_args /* { 602 struct vnode *a_vp; 603 struct vattr *a_vap; 604 struct ucred *a_cred; 605 struct proc *a_p; 606 } */ *ap = v; 607 struct vnode *vp = ap->a_vp; 608 struct nfsnode *np = VTONFS(vp); 609 caddr_t cp; 610 u_int32_t *tl; 611 int32_t t1, t2; 612 caddr_t bpos, dpos; 613 int error = 0; 614 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 615 const int v3 = NFS_ISV3(vp); 616 617 /* 618 * Update local times for special files. 619 */ 620 if (np->n_flag & (NACC | NUPD)) 621 np->n_flag |= NCHG; 622 /* 623 * First look in the cache. 624 */ 625 if (nfs_getattrcache(vp, ap->a_vap) == 0) 626 return (0); 627 nfsstats.rpccnt[NFSPROC_GETATTR]++; 628 nfsm_reqhead(vp, NFSPROC_GETATTR, NFSX_FH(v3)); 629 nfsm_fhtom(vp, v3); 630 nfsm_request(vp, NFSPROC_GETATTR, ap->a_p, ap->a_cred); 631 if (!error) { 632 nfsm_loadattr(vp, ap->a_vap); 633 if (vp->v_type == VDIR && 634 ap->a_vap->va_blocksize < NFS_DIRFRAGSIZ) 635 ap->a_vap->va_blocksize = NFS_DIRFRAGSIZ; 636 } 637 nfsm_reqdone; 638 return (error); 639 } 640 641 /* 642 * nfs setattr call. 643 */ 644 int 645 nfs_setattr(v) 646 void *v; 647 { 648 struct vop_setattr_args /* { 649 struct vnodeop_desc *a_desc; 650 struct vnode *a_vp; 651 struct vattr *a_vap; 652 struct ucred *a_cred; 653 struct proc *a_p; 654 } */ *ap = v; 655 struct vnode *vp = ap->a_vp; 656 struct nfsnode *np = VTONFS(vp); 657 struct vattr *vap = ap->a_vap; 658 int error = 0; 659 u_quad_t tsize = 0; 660 661 /* 662 * Setting of flags is not supported. 663 */ 664 if (vap->va_flags != VNOVAL) 665 return (EOPNOTSUPP); 666 667 /* 668 * Disallow write attempts if the filesystem is mounted read-only. 669 */ 670 if ((vap->va_uid != (uid_t)VNOVAL || 671 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL || 672 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) && 673 (vp->v_mount->mnt_flag & MNT_RDONLY)) 674 return (EROFS); 675 if (vap->va_size != VNOVAL) { 676 switch (vp->v_type) { 677 case VDIR: 678 return (EISDIR); 679 case VCHR: 680 case VBLK: 681 case VSOCK: 682 case VFIFO: 683 if (vap->va_mtime.tv_sec == VNOVAL && 684 vap->va_atime.tv_sec == VNOVAL && 685 vap->va_mode == (mode_t)VNOVAL && 686 vap->va_uid == (uid_t)VNOVAL && 687 vap->va_gid == (gid_t)VNOVAL) 688 return (0); 689 vap->va_size = VNOVAL; 690 break; 691 default: 692 /* 693 * Disallow write attempts if the filesystem is 694 * mounted read-only. 695 */ 696 if (vp->v_mount->mnt_flag & MNT_RDONLY) 697 return (EROFS); 698 uvm_vnp_setsize(vp, vap->va_size); 699 tsize = np->n_size; 700 np->n_size = vap->va_size; 701 if (vap->va_size == 0) 702 error = nfs_vinvalbuf(vp, 0, 703 ap->a_cred, ap->a_p, 1); 704 else 705 error = nfs_vinvalbuf(vp, V_SAVE, 706 ap->a_cred, ap->a_p, 1); 707 if (error) { 708 uvm_vnp_setsize(vp, tsize); 709 return (error); 710 } 711 np->n_vattr->va_size = vap->va_size; 712 } 713 } else if ((vap->va_mtime.tv_sec != VNOVAL || 714 vap->va_atime.tv_sec != VNOVAL) && 715 vp->v_type == VREG && 716 (error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 717 ap->a_p, 1)) == EINTR) 718 return (error); 719 error = nfs_setattrrpc(vp, vap, ap->a_cred, ap->a_p); 720 if (error && vap->va_size != VNOVAL) { 721 np->n_size = np->n_vattr->va_size = tsize; 722 uvm_vnp_setsize(vp, np->n_size); 723 } 724 return (error); 725 } 726 727 /* 728 * Do an nfs setattr rpc. 729 */ 730 int 731 nfs_setattrrpc(vp, vap, cred, procp) 732 struct vnode *vp; 733 struct vattr *vap; 734 struct ucred *cred; 735 struct proc *procp; 736 { 737 struct nfsv2_sattr *sp; 738 caddr_t cp; 739 int32_t t1, t2; 740 caddr_t bpos, dpos, cp2; 741 u_int32_t *tl; 742 int error = 0, wccflag = NFSV3_WCCRATTR; 743 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 744 const int v3 = NFS_ISV3(vp); 745 746 nfsstats.rpccnt[NFSPROC_SETATTR]++; 747 nfsm_reqhead(vp, NFSPROC_SETATTR, NFSX_FH(v3) + NFSX_SATTR(v3)); 748 nfsm_fhtom(vp, v3); 749 if (v3) { 750 nfsm_v3attrbuild(vap, TRUE); 751 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 752 *tl = nfs_false; 753 } else { 754 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 755 if (vap->va_mode == (mode_t)VNOVAL) 756 sp->sa_mode = nfs_xdrneg1; 757 else 758 sp->sa_mode = vtonfsv2_mode(vp->v_type, vap->va_mode); 759 if (vap->va_uid == (uid_t)VNOVAL) 760 sp->sa_uid = nfs_xdrneg1; 761 else 762 sp->sa_uid = txdr_unsigned(vap->va_uid); 763 if (vap->va_gid == (gid_t)VNOVAL) 764 sp->sa_gid = nfs_xdrneg1; 765 else 766 sp->sa_gid = txdr_unsigned(vap->va_gid); 767 sp->sa_size = txdr_unsigned(vap->va_size); 768 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 769 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 770 } 771 nfsm_request(vp, NFSPROC_SETATTR, procp, cred); 772 if (v3) { 773 nfsm_wcc_data(vp, wccflag); 774 } else 775 nfsm_loadattr(vp, (struct vattr *)0); 776 nfsm_reqdone; 777 return (error); 778 } 779 780 /* 781 * nfs lookup call, one step at a time... 782 * First look in cache 783 * If not found, unlock the directory nfsnode and do the rpc 784 * 785 * This code is full of lock/unlock statements and checks, because 786 * we continue after cache_lookup has finished (we need to check 787 * with the attr cache and do an rpc if it has timed out). This means 788 * that the locking effects of cache_lookup have to be taken into 789 * account. 790 */ 791 int 792 nfs_lookup(v) 793 void *v; 794 { 795 struct vop_lookup_args /* { 796 struct vnodeop_desc *a_desc; 797 struct vnode *a_dvp; 798 struct vnode **a_vpp; 799 struct componentname *a_cnp; 800 } */ *ap = v; 801 struct componentname *cnp = ap->a_cnp; 802 struct vnode *dvp = ap->a_dvp; 803 struct vnode **vpp = ap->a_vpp; 804 int flags; 805 struct vnode *newvp; 806 u_int32_t *tl; 807 caddr_t cp; 808 int32_t t1, t2; 809 struct nfsmount *nmp; 810 caddr_t bpos, dpos, cp2; 811 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 812 long len; 813 nfsfh_t *fhp; 814 struct nfsnode *np; 815 int lockparent, wantparent, error = 0, attrflag, fhsize; 816 const int v3 = NFS_ISV3(dvp); 817 818 cnp->cn_flags &= ~PDIRUNLOCK; 819 flags = cnp->cn_flags; 820 821 *vpp = NULLVP; 822 newvp = NULLVP; 823 if ((flags & ISLASTCN) && (dvp->v_mount->mnt_flag & MNT_RDONLY) && 824 (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) 825 return (EROFS); 826 if (dvp->v_type != VDIR) 827 return (ENOTDIR); 828 829 lockparent = flags & LOCKPARENT; 830 wantparent = flags & (LOCKPARENT|WANTPARENT); 831 nmp = VFSTONFS(dvp->v_mount); 832 np = VTONFS(dvp); 833 834 /* 835 * Before tediously performing a linear scan of the directory, 836 * check the name cache to see if the directory/name pair 837 * we are looking for is known already. 838 * If the directory/name pair is found in the name cache, 839 * we have to ensure the directory has not changed from 840 * the time the cache entry has been created. If it has, 841 * the cache entry has to be ignored 842 */ 843 if ((error = cache_lookup(dvp, vpp, cnp)) >= 0) { 844 struct vattr vattr; 845 int err2; 846 847 if (error && error != ENOENT) { 848 *vpp = NULLVP; 849 return error; 850 } 851 852 if (cnp->cn_flags & PDIRUNLOCK) { 853 err2 = vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 854 if (err2 != 0) { 855 *vpp = NULLVP; 856 return err2; 857 } 858 cnp->cn_flags &= ~PDIRUNLOCK; 859 } 860 861 err2 = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, cnp->cn_proc); 862 if (err2 != 0) { 863 if (error == 0) { 864 if (*vpp != dvp) 865 vput(*vpp); 866 else 867 vrele(*vpp); 868 } 869 *vpp = NULLVP; 870 return err2; 871 } 872 873 if (error == ENOENT) { 874 if (!VOP_GETATTR(dvp, &vattr, cnp->cn_cred, 875 cnp->cn_proc) && vattr.va_mtime.tv_sec == 876 VTONFS(dvp)->n_nctime) 877 return ENOENT; 878 cache_purge(dvp); 879 np->n_nctime = 0; 880 goto dorpc; 881 } 882 883 newvp = *vpp; 884 if (!VOP_GETATTR(newvp, &vattr, cnp->cn_cred, cnp->cn_proc) 885 && vattr.va_ctime.tv_sec == VTONFS(newvp)->n_ctime) 886 { 887 nfsstats.lookupcache_hits++; 888 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 889 cnp->cn_flags |= SAVENAME; 890 if ((!lockparent || !(flags & ISLASTCN)) && 891 newvp != dvp) 892 VOP_UNLOCK(dvp, 0); 893 return (0); 894 } 895 cache_purge(newvp); 896 if (newvp != dvp) 897 vput(newvp); 898 else 899 vrele(newvp); 900 *vpp = NULLVP; 901 } 902 dorpc: 903 error = 0; 904 newvp = NULLVP; 905 nfsstats.lookupcache_misses++; 906 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 907 len = cnp->cn_namelen; 908 nfsm_reqhead(dvp, NFSPROC_LOOKUP, 909 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 910 nfsm_fhtom(dvp, v3); 911 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 912 nfsm_request(dvp, NFSPROC_LOOKUP, cnp->cn_proc, cnp->cn_cred); 913 if (error) { 914 nfsm_postop_attr(dvp, attrflag); 915 m_freem(mrep); 916 goto nfsmout; 917 } 918 nfsm_getfh(fhp, fhsize, v3); 919 920 /* 921 * Handle RENAME case... 922 */ 923 if (cnp->cn_nameiop == RENAME && wantparent && (flags & ISLASTCN)) { 924 if (NFS_CMPFH(np, fhp, fhsize)) { 925 m_freem(mrep); 926 return (EISDIR); 927 } 928 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 929 if (error) { 930 m_freem(mrep); 931 return error; 932 } 933 newvp = NFSTOV(np); 934 if (v3) { 935 nfsm_postop_attr(newvp, attrflag); 936 nfsm_postop_attr(dvp, attrflag); 937 } else 938 nfsm_loadattr(newvp, (struct vattr *)0); 939 *vpp = newvp; 940 m_freem(mrep); 941 cnp->cn_flags |= SAVENAME; 942 if (!lockparent) { 943 VOP_UNLOCK(dvp, 0); 944 cnp->cn_flags |= PDIRUNLOCK; 945 } 946 return (0); 947 } 948 949 /* 950 * The postop attr handling is duplicated for each if case, 951 * because it should be done while dvp is locked (unlocking 952 * dvp is different for each case). 953 */ 954 955 if (NFS_CMPFH(np, fhp, fhsize)) { 956 /* 957 * "." lookup 958 */ 959 VREF(dvp); 960 newvp = dvp; 961 if (v3) { 962 nfsm_postop_attr(newvp, attrflag); 963 nfsm_postop_attr(dvp, attrflag); 964 } else 965 nfsm_loadattr(newvp, (struct vattr *)0); 966 } else if (flags & ISDOTDOT) { 967 /* 968 * ".." lookup 969 */ 970 VOP_UNLOCK(dvp, 0); 971 cnp->cn_flags |= PDIRUNLOCK; 972 973 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 974 if (error) { 975 if (vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY) == 0) 976 cnp->cn_flags &= ~PDIRUNLOCK; 977 m_freem(mrep); 978 return error; 979 } 980 newvp = NFSTOV(np); 981 982 if (v3) { 983 nfsm_postop_attr(newvp, attrflag); 984 nfsm_postop_attr(dvp, attrflag); 985 } else 986 nfsm_loadattr(newvp, (struct vattr *)0); 987 988 if (lockparent && (flags & ISLASTCN)) { 989 if ((error = vn_lock(dvp, LK_EXCLUSIVE))) { 990 m_freem(mrep); 991 vput(newvp); 992 return error; 993 } 994 cnp->cn_flags &= ~PDIRUNLOCK; 995 } 996 } else { 997 /* 998 * Other lookups. 999 */ 1000 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 1001 if (error) { 1002 m_freem(mrep); 1003 return error; 1004 } 1005 newvp = NFSTOV(np); 1006 if (v3) { 1007 nfsm_postop_attr(newvp, attrflag); 1008 nfsm_postop_attr(dvp, attrflag); 1009 } else 1010 nfsm_loadattr(newvp, (struct vattr *)0); 1011 if (!lockparent || !(flags & ISLASTCN)) { 1012 VOP_UNLOCK(dvp, 0); 1013 cnp->cn_flags |= PDIRUNLOCK; 1014 } 1015 } 1016 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 1017 cnp->cn_flags |= SAVENAME; 1018 if ((cnp->cn_flags & MAKEENTRY) && 1019 (cnp->cn_nameiop != DELETE || !(flags & ISLASTCN))) { 1020 np->n_ctime = np->n_vattr->va_ctime.tv_sec; 1021 cache_enter(dvp, newvp, cnp); 1022 } 1023 *vpp = newvp; 1024 nfsm_reqdone; 1025 if (error) { 1026 /* 1027 * We get here only because of errors returned by 1028 * the RPC. Otherwise we'll have returned above 1029 * (the nfsm_* macros will jump to nfsm_reqdone 1030 * on error). 1031 */ 1032 if (error == ENOENT && (cnp->cn_flags & MAKEENTRY) && 1033 cnp->cn_nameiop != CREATE) { 1034 if (VTONFS(dvp)->n_nctime == 0) 1035 VTONFS(dvp)->n_nctime = 1036 VTONFS(dvp)->n_vattr->va_mtime.tv_sec; 1037 cache_enter(dvp, NULL, cnp); 1038 } 1039 if (newvp != NULLVP) { 1040 vrele(newvp); 1041 if (newvp != dvp) 1042 VOP_UNLOCK(newvp, 0); 1043 } 1044 if ((cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME) && 1045 (flags & ISLASTCN) && error == ENOENT) { 1046 if (dvp->v_mount->mnt_flag & MNT_RDONLY) 1047 error = EROFS; 1048 else 1049 error = EJUSTRETURN; 1050 } 1051 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 1052 cnp->cn_flags |= SAVENAME; 1053 *vpp = NULL; 1054 } 1055 1056 return error; 1057 } 1058 1059 /* 1060 * nfs read call. 1061 * Just call nfs_bioread() to do the work. 1062 */ 1063 int 1064 nfs_read(v) 1065 void *v; 1066 { 1067 struct vop_read_args /* { 1068 struct vnode *a_vp; 1069 struct uio *a_uio; 1070 int a_ioflag; 1071 struct ucred *a_cred; 1072 } */ *ap = v; 1073 struct vnode *vp = ap->a_vp; 1074 1075 if (vp->v_type != VREG) 1076 return (EPERM); 1077 return (nfs_bioread(vp, ap->a_uio, ap->a_ioflag, ap->a_cred, 0)); 1078 } 1079 1080 /* 1081 * nfs readlink call 1082 */ 1083 int 1084 nfs_readlink(v) 1085 void *v; 1086 { 1087 struct vop_readlink_args /* { 1088 struct vnode *a_vp; 1089 struct uio *a_uio; 1090 struct ucred *a_cred; 1091 } */ *ap = v; 1092 struct vnode *vp = ap->a_vp; 1093 1094 if (vp->v_type != VLNK) 1095 return (EPERM); 1096 return (nfs_bioread(vp, ap->a_uio, 0, ap->a_cred, 0)); 1097 } 1098 1099 /* 1100 * Do a readlink rpc. 1101 * Called by nfs_doio() from below the buffer cache. 1102 */ 1103 int 1104 nfs_readlinkrpc(vp, uiop, cred) 1105 struct vnode *vp; 1106 struct uio *uiop; 1107 struct ucred *cred; 1108 { 1109 u_int32_t *tl; 1110 caddr_t cp; 1111 int32_t t1, t2; 1112 caddr_t bpos, dpos, cp2; 1113 int error = 0, len, attrflag; 1114 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1115 const int v3 = NFS_ISV3(vp); 1116 1117 nfsstats.rpccnt[NFSPROC_READLINK]++; 1118 nfsm_reqhead(vp, NFSPROC_READLINK, NFSX_FH(v3)); 1119 nfsm_fhtom(vp, v3); 1120 nfsm_request(vp, NFSPROC_READLINK, uiop->uio_procp, cred); 1121 if (v3) 1122 nfsm_postop_attr(vp, attrflag); 1123 if (!error) { 1124 nfsm_strsiz(len, NFS_MAXPATHLEN); 1125 nfsm_mtouio(uiop, len); 1126 } 1127 nfsm_reqdone; 1128 return (error); 1129 } 1130 1131 /* 1132 * nfs read rpc call 1133 * Ditto above 1134 */ 1135 int 1136 nfs_readrpc(vp, uiop) 1137 struct vnode *vp; 1138 struct uio *uiop; 1139 { 1140 u_int32_t *tl; 1141 caddr_t cp; 1142 int32_t t1, t2; 1143 caddr_t bpos, dpos, cp2; 1144 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1145 struct nfsmount *nmp; 1146 int error = 0, len, retlen, tsiz, eof, attrflag; 1147 const int v3 = NFS_ISV3(vp); 1148 1149 #ifndef nolint 1150 eof = 0; 1151 #endif 1152 nmp = VFSTONFS(vp->v_mount); 1153 tsiz = uiop->uio_resid; 1154 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1155 return (EFBIG); 1156 while (tsiz > 0) { 1157 nfsstats.rpccnt[NFSPROC_READ]++; 1158 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz; 1159 nfsm_reqhead(vp, NFSPROC_READ, NFSX_FH(v3) + NFSX_UNSIGNED * 3); 1160 nfsm_fhtom(vp, v3); 1161 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED * 3); 1162 if (v3) { 1163 txdr_hyper(uiop->uio_offset, tl); 1164 *(tl + 2) = txdr_unsigned(len); 1165 } else { 1166 *tl++ = txdr_unsigned(uiop->uio_offset); 1167 *tl++ = txdr_unsigned(len); 1168 *tl = 0; 1169 } 1170 nfsm_request(vp, NFSPROC_READ, uiop->uio_procp, 1171 VTONFS(vp)->n_rcred); 1172 if (v3) { 1173 nfsm_postop_attr(vp, attrflag); 1174 if (error) { 1175 m_freem(mrep); 1176 goto nfsmout; 1177 } 1178 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1179 eof = fxdr_unsigned(int, *(tl + 1)); 1180 } else 1181 nfsm_loadattr(vp, (struct vattr *)0); 1182 nfsm_strsiz(retlen, nmp->nm_rsize); 1183 nfsm_mtouio(uiop, retlen); 1184 m_freem(mrep); 1185 tsiz -= retlen; 1186 if (v3) { 1187 if (eof || retlen == 0) 1188 tsiz = 0; 1189 } else if (retlen < len) 1190 tsiz = 0; 1191 } 1192 nfsmout: 1193 return (error); 1194 } 1195 1196 /* 1197 * nfs write call 1198 */ 1199 int 1200 nfs_writerpc(vp, uiop, iomode, must_commit) 1201 struct vnode *vp; 1202 struct uio *uiop; 1203 int *iomode, *must_commit; 1204 { 1205 u_int32_t *tl; 1206 caddr_t cp; 1207 int32_t t1, t2, backup; 1208 caddr_t bpos, dpos, cp2; 1209 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1210 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1211 int error = 0, len, tsiz, wccflag = NFSV3_WCCRATTR, rlen, commit; 1212 const int v3 = NFS_ISV3(vp); 1213 int committed = NFSV3WRITE_FILESYNC; 1214 1215 if (vp->v_mount->mnt_flag & MNT_RDONLY) { 1216 panic("writerpc readonly vp %p", vp); 1217 } 1218 1219 #ifdef DIAGNOSTIC 1220 if (uiop->uio_iovcnt != 1) 1221 panic("nfs: writerpc iovcnt > 1"); 1222 #endif 1223 *must_commit = 0; 1224 tsiz = uiop->uio_resid; 1225 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1226 return (EFBIG); 1227 while (tsiz > 0) { 1228 nfsstats.rpccnt[NFSPROC_WRITE]++; 1229 len = min(tsiz, nmp->nm_wsize); 1230 nfsm_reqhead(vp, NFSPROC_WRITE, 1231 NFSX_FH(v3) + 5 * NFSX_UNSIGNED + nfsm_rndup(len)); 1232 nfsm_fhtom(vp, v3); 1233 if (v3) { 1234 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 1235 txdr_hyper(uiop->uio_offset, tl); 1236 tl += 2; 1237 *tl++ = txdr_unsigned(len); 1238 *tl++ = txdr_unsigned(*iomode); 1239 *tl = txdr_unsigned(len); 1240 } else { 1241 u_int32_t x; 1242 1243 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1244 /* Set both "begin" and "current" to non-garbage. */ 1245 x = txdr_unsigned((u_int32_t)uiop->uio_offset); 1246 *tl++ = x; /* "begin offset" */ 1247 *tl++ = x; /* "current offset" */ 1248 x = txdr_unsigned(len); 1249 *tl++ = x; /* total to this offset */ 1250 *tl = x; /* size of this write */ 1251 1252 } 1253 nfsm_uiotom(uiop, len); 1254 nfsm_request(vp, NFSPROC_WRITE, uiop->uio_procp, 1255 VTONFS(vp)->n_wcred); 1256 if (v3) { 1257 wccflag = NFSV3_WCCCHK; 1258 nfsm_wcc_data(vp, wccflag); 1259 if (!error) { 1260 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED 1261 + NFSX_V3WRITEVERF); 1262 rlen = fxdr_unsigned(int, *tl++); 1263 if (rlen == 0) { 1264 error = NFSERR_IO; 1265 m_freem(mrep); 1266 break; 1267 } else if (rlen < len) { 1268 backup = len - rlen; 1269 uiop->uio_iov->iov_base = 1270 (caddr_t)uiop->uio_iov->iov_base - 1271 backup; 1272 uiop->uio_iov->iov_len += backup; 1273 uiop->uio_offset -= backup; 1274 uiop->uio_resid += backup; 1275 len = rlen; 1276 } 1277 commit = fxdr_unsigned(int, *tl++); 1278 1279 /* 1280 * Return the lowest committment level 1281 * obtained by any of the RPCs. 1282 */ 1283 if (committed == NFSV3WRITE_FILESYNC) 1284 committed = commit; 1285 else if (committed == NFSV3WRITE_DATASYNC && 1286 commit == NFSV3WRITE_UNSTABLE) 1287 committed = commit; 1288 if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0){ 1289 memcpy((caddr_t)nmp->nm_verf, (caddr_t)tl, 1290 NFSX_V3WRITEVERF); 1291 nmp->nm_iflag |= NFSMNT_HASWRITEVERF; 1292 } else if (memcmp((caddr_t)tl, 1293 (caddr_t)nmp->nm_verf, NFSX_V3WRITEVERF)) { 1294 *must_commit = 1; 1295 memcpy((caddr_t)nmp->nm_verf, (caddr_t)tl, 1296 NFSX_V3WRITEVERF); 1297 } 1298 } 1299 } else 1300 nfsm_loadattr(vp, (struct vattr *)0); 1301 if (wccflag) 1302 VTONFS(vp)->n_mtime = VTONFS(vp)->n_vattr->va_mtime.tv_sec; 1303 m_freem(mrep); 1304 if (error) 1305 break; 1306 tsiz -= len; 1307 } 1308 nfsmout: 1309 *iomode = committed; 1310 if (error) 1311 uiop->uio_resid = tsiz; 1312 return (error); 1313 } 1314 1315 /* 1316 * nfs mknod rpc 1317 * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the 1318 * mode set to specify the file type and the size field for rdev. 1319 */ 1320 int 1321 nfs_mknodrpc(dvp, vpp, cnp, vap) 1322 struct vnode *dvp; 1323 struct vnode **vpp; 1324 struct componentname *cnp; 1325 struct vattr *vap; 1326 { 1327 struct nfsv2_sattr *sp; 1328 u_int32_t *tl; 1329 caddr_t cp; 1330 int32_t t1, t2; 1331 struct vnode *newvp = (struct vnode *)0; 1332 struct nfsnode *np; 1333 char *cp2; 1334 caddr_t bpos, dpos; 1335 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0; 1336 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1337 u_int32_t rdev; 1338 const int v3 = NFS_ISV3(dvp); 1339 1340 if (vap->va_type == VCHR || vap->va_type == VBLK) 1341 rdev = txdr_unsigned(vap->va_rdev); 1342 else if (vap->va_type == VFIFO || vap->va_type == VSOCK) 1343 rdev = nfs_xdrneg1; 1344 else { 1345 VOP_ABORTOP(dvp, cnp); 1346 vput(dvp); 1347 return (EOPNOTSUPP); 1348 } 1349 nfsstats.rpccnt[NFSPROC_MKNOD]++; 1350 nfsm_reqhead(dvp, NFSPROC_MKNOD, NFSX_FH(v3) + 4 * NFSX_UNSIGNED + 1351 + nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1352 nfsm_fhtom(dvp, v3); 1353 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1354 if (v3) { 1355 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1356 *tl++ = vtonfsv3_type(vap->va_type); 1357 nfsm_v3attrbuild(vap, FALSE); 1358 if (vap->va_type == VCHR || vap->va_type == VBLK) { 1359 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1360 *tl++ = txdr_unsigned(major(vap->va_rdev)); 1361 *tl = txdr_unsigned(minor(vap->va_rdev)); 1362 } 1363 } else { 1364 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1365 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1366 sp->sa_uid = nfs_xdrneg1; 1367 sp->sa_gid = nfs_xdrneg1; 1368 sp->sa_size = rdev; 1369 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1370 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1371 } 1372 nfsm_request(dvp, NFSPROC_MKNOD, cnp->cn_proc, cnp->cn_cred); 1373 if (!error) { 1374 nfsm_mtofh(dvp, newvp, v3, gotvp); 1375 if (!gotvp) { 1376 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1377 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np); 1378 if (!error) 1379 newvp = NFSTOV(np); 1380 } 1381 } 1382 if (v3) 1383 nfsm_wcc_data(dvp, wccflag); 1384 nfsm_reqdone; 1385 if (error) { 1386 if (newvp) 1387 vput(newvp); 1388 } else { 1389 if (cnp->cn_flags & MAKEENTRY) 1390 cache_enter(dvp, newvp, cnp); 1391 *vpp = newvp; 1392 } 1393 PNBUF_PUT(cnp->cn_pnbuf); 1394 VTONFS(dvp)->n_flag |= NMODIFIED; 1395 if (!wccflag) 1396 VTONFS(dvp)->n_attrstamp = 0; 1397 vput(dvp); 1398 return (error); 1399 } 1400 1401 /* 1402 * nfs mknod vop 1403 * just call nfs_mknodrpc() to do the work. 1404 */ 1405 /* ARGSUSED */ 1406 int 1407 nfs_mknod(v) 1408 void *v; 1409 { 1410 struct vop_mknod_args /* { 1411 struct vnode *a_dvp; 1412 struct vnode **a_vpp; 1413 struct componentname *a_cnp; 1414 struct vattr *a_vap; 1415 } */ *ap = v; 1416 int error; 1417 1418 error = nfs_mknodrpc(ap->a_dvp, ap->a_vpp, ap->a_cnp, ap->a_vap); 1419 return (error); 1420 } 1421 1422 static u_long create_verf; 1423 /* 1424 * nfs file create call 1425 */ 1426 int 1427 nfs_create(v) 1428 void *v; 1429 { 1430 struct vop_create_args /* { 1431 struct vnode *a_dvp; 1432 struct vnode **a_vpp; 1433 struct componentname *a_cnp; 1434 struct vattr *a_vap; 1435 } */ *ap = v; 1436 struct vnode *dvp = ap->a_dvp; 1437 struct vattr *vap = ap->a_vap; 1438 struct componentname *cnp = ap->a_cnp; 1439 struct nfsv2_sattr *sp; 1440 u_int32_t *tl; 1441 caddr_t cp; 1442 int32_t t1, t2; 1443 struct nfsnode *np = (struct nfsnode *)0; 1444 struct vnode *newvp = (struct vnode *)0; 1445 caddr_t bpos, dpos, cp2; 1446 int error, wccflag = NFSV3_WCCRATTR, gotvp = 0, fmode = 0; 1447 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1448 const int v3 = NFS_ISV3(dvp); 1449 1450 /* 1451 * Oops, not for me.. 1452 */ 1453 if (vap->va_type == VSOCK) 1454 return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap)); 1455 1456 #ifdef VA_EXCLUSIVE 1457 if (vap->va_vaflags & VA_EXCLUSIVE) 1458 fmode |= O_EXCL; 1459 #endif 1460 again: 1461 error = 0; 1462 nfsstats.rpccnt[NFSPROC_CREATE]++; 1463 nfsm_reqhead(dvp, NFSPROC_CREATE, NFSX_FH(v3) + 2 * NFSX_UNSIGNED + 1464 nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1465 nfsm_fhtom(dvp, v3); 1466 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1467 if (v3) { 1468 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1469 if (fmode & O_EXCL) { 1470 *tl = txdr_unsigned(NFSV3CREATE_EXCLUSIVE); 1471 nfsm_build(tl, u_int32_t *, NFSX_V3CREATEVERF); 1472 #ifdef INET 1473 if (in_ifaddr.tqh_first) 1474 *tl++ = in_ifaddr.tqh_first->ia_addr.sin_addr.s_addr; 1475 else 1476 *tl++ = create_verf; 1477 #else 1478 *tl++ = create_verf; 1479 #endif 1480 *tl = ++create_verf; 1481 } else { 1482 *tl = txdr_unsigned(NFSV3CREATE_UNCHECKED); 1483 nfsm_v3attrbuild(vap, FALSE); 1484 } 1485 } else { 1486 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1487 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1488 sp->sa_uid = nfs_xdrneg1; 1489 sp->sa_gid = nfs_xdrneg1; 1490 sp->sa_size = 0; 1491 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1492 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1493 } 1494 nfsm_request(dvp, NFSPROC_CREATE, cnp->cn_proc, cnp->cn_cred); 1495 if (!error) { 1496 nfsm_mtofh(dvp, newvp, v3, gotvp); 1497 if (!gotvp) { 1498 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1499 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np); 1500 if (!error) 1501 newvp = NFSTOV(np); 1502 } 1503 } 1504 if (v3) 1505 nfsm_wcc_data(dvp, wccflag); 1506 nfsm_reqdone; 1507 if (error) { 1508 if (v3 && (fmode & O_EXCL) && error == NFSERR_NOTSUPP) { 1509 fmode &= ~O_EXCL; 1510 goto again; 1511 } 1512 if (newvp) 1513 vput(newvp); 1514 } else if (v3 && (fmode & O_EXCL)) 1515 error = nfs_setattrrpc(newvp, vap, cnp->cn_cred, cnp->cn_proc); 1516 if (!error) { 1517 if (cnp->cn_flags & MAKEENTRY) 1518 cache_enter(dvp, newvp, cnp); 1519 *ap->a_vpp = newvp; 1520 } 1521 PNBUF_PUT(cnp->cn_pnbuf); 1522 VTONFS(dvp)->n_flag |= NMODIFIED; 1523 if (!wccflag) 1524 VTONFS(dvp)->n_attrstamp = 0; 1525 vput(dvp); 1526 return (error); 1527 } 1528 1529 /* 1530 * nfs file remove call 1531 * To try and make nfs semantics closer to ufs semantics, a file that has 1532 * other processes using the vnode is renamed instead of removed and then 1533 * removed later on the last close. 1534 * - If v_usecount > 1 1535 * If a rename is not already in the works 1536 * call nfs_sillyrename() to set it up 1537 * else 1538 * do the remove rpc 1539 */ 1540 int 1541 nfs_remove(v) 1542 void *v; 1543 { 1544 struct vop_remove_args /* { 1545 struct vnodeop_desc *a_desc; 1546 struct vnode * a_dvp; 1547 struct vnode * a_vp; 1548 struct componentname * a_cnp; 1549 } */ *ap = v; 1550 struct vnode *vp = ap->a_vp; 1551 struct vnode *dvp = ap->a_dvp; 1552 struct componentname *cnp = ap->a_cnp; 1553 struct nfsnode *np = VTONFS(vp); 1554 int error = 0; 1555 struct vattr vattr; 1556 1557 #ifndef DIAGNOSTIC 1558 if ((cnp->cn_flags & HASBUF) == 0) 1559 panic("nfs_remove: no name"); 1560 if (vp->v_usecount < 1) 1561 panic("nfs_remove: bad v_usecount"); 1562 #endif 1563 if (vp->v_type == VDIR) 1564 error = EPERM; 1565 else if (vp->v_usecount == 1 || (np->n_sillyrename && 1566 VOP_GETATTR(vp, &vattr, cnp->cn_cred, cnp->cn_proc) == 0 && 1567 vattr.va_nlink > 1)) { 1568 /* 1569 * Purge the name cache so that the chance of a lookup for 1570 * the name succeeding while the remove is in progress is 1571 * minimized. Without node locking it can still happen, such 1572 * that an I/O op returns ESTALE, but since you get this if 1573 * another host removes the file.. 1574 */ 1575 cache_purge(vp); 1576 /* 1577 * throw away biocache buffers, mainly to avoid 1578 * unnecessary delayed writes later. 1579 */ 1580 error = nfs_vinvalbuf(vp, 0, cnp->cn_cred, cnp->cn_proc, 1); 1581 /* Do the rpc */ 1582 if (error != EINTR) 1583 error = nfs_removerpc(dvp, cnp->cn_nameptr, 1584 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc); 1585 /* 1586 * Kludge City: If the first reply to the remove rpc is lost.. 1587 * the reply to the retransmitted request will be ENOENT 1588 * since the file was in fact removed 1589 * Therefore, we cheat and return success. 1590 */ 1591 if (error == ENOENT) 1592 error = 0; 1593 } else if (!np->n_sillyrename) 1594 error = nfs_sillyrename(dvp, vp, cnp); 1595 PNBUF_PUT(cnp->cn_pnbuf); 1596 np->n_attrstamp = 0; 1597 vput(dvp); 1598 vput(vp); 1599 return (error); 1600 } 1601 1602 /* 1603 * nfs file remove rpc called from nfs_inactive 1604 */ 1605 int 1606 nfs_removeit(sp) 1607 struct sillyrename *sp; 1608 { 1609 1610 return (nfs_removerpc(sp->s_dvp, sp->s_name, sp->s_namlen, sp->s_cred, 1611 (struct proc *)0)); 1612 } 1613 1614 /* 1615 * Nfs remove rpc, called from nfs_remove() and nfs_removeit(). 1616 */ 1617 int 1618 nfs_removerpc(dvp, name, namelen, cred, proc) 1619 struct vnode *dvp; 1620 const char *name; 1621 int namelen; 1622 struct ucred *cred; 1623 struct proc *proc; 1624 { 1625 u_int32_t *tl; 1626 caddr_t cp; 1627 int32_t t1, t2; 1628 caddr_t bpos, dpos, cp2; 1629 int error = 0, wccflag = NFSV3_WCCRATTR; 1630 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1631 const int v3 = NFS_ISV3(dvp); 1632 1633 nfsstats.rpccnt[NFSPROC_REMOVE]++; 1634 nfsm_reqhead(dvp, NFSPROC_REMOVE, 1635 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(namelen)); 1636 nfsm_fhtom(dvp, v3); 1637 nfsm_strtom(name, namelen, NFS_MAXNAMLEN); 1638 nfsm_request(dvp, NFSPROC_REMOVE, proc, cred); 1639 if (v3) 1640 nfsm_wcc_data(dvp, wccflag); 1641 nfsm_reqdone; 1642 VTONFS(dvp)->n_flag |= NMODIFIED; 1643 if (!wccflag) 1644 VTONFS(dvp)->n_attrstamp = 0; 1645 return (error); 1646 } 1647 1648 /* 1649 * nfs file rename call 1650 */ 1651 int 1652 nfs_rename(v) 1653 void *v; 1654 { 1655 struct vop_rename_args /* { 1656 struct vnode *a_fdvp; 1657 struct vnode *a_fvp; 1658 struct componentname *a_fcnp; 1659 struct vnode *a_tdvp; 1660 struct vnode *a_tvp; 1661 struct componentname *a_tcnp; 1662 } */ *ap = v; 1663 struct vnode *fvp = ap->a_fvp; 1664 struct vnode *tvp = ap->a_tvp; 1665 struct vnode *fdvp = ap->a_fdvp; 1666 struct vnode *tdvp = ap->a_tdvp; 1667 struct componentname *tcnp = ap->a_tcnp; 1668 struct componentname *fcnp = ap->a_fcnp; 1669 int error; 1670 1671 #ifndef DIAGNOSTIC 1672 if ((tcnp->cn_flags & HASBUF) == 0 || 1673 (fcnp->cn_flags & HASBUF) == 0) 1674 panic("nfs_rename: no name"); 1675 #endif 1676 /* Check for cross-device rename */ 1677 if ((fvp->v_mount != tdvp->v_mount) || 1678 (tvp && (fvp->v_mount != tvp->v_mount))) { 1679 error = EXDEV; 1680 goto out; 1681 } 1682 1683 /* 1684 * If the tvp exists and is in use, sillyrename it before doing the 1685 * rename of the new file over it. 1686 */ 1687 if (tvp && tvp->v_usecount > 1 && !VTONFS(tvp)->n_sillyrename && 1688 tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp)) { 1689 vput(tvp); 1690 tvp = NULL; 1691 } 1692 1693 error = nfs_renamerpc(fdvp, fcnp->cn_nameptr, fcnp->cn_namelen, 1694 tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred, 1695 tcnp->cn_proc); 1696 1697 if (fvp->v_type == VDIR) { 1698 if (tvp != NULL && tvp->v_type == VDIR) 1699 cache_purge(tdvp); 1700 cache_purge(fdvp); 1701 } 1702 out: 1703 if (tdvp == tvp) 1704 vrele(tdvp); 1705 else 1706 vput(tdvp); 1707 if (tvp) 1708 vput(tvp); 1709 vrele(fdvp); 1710 vrele(fvp); 1711 /* 1712 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry. 1713 */ 1714 if (error == ENOENT) 1715 error = 0; 1716 return (error); 1717 } 1718 1719 /* 1720 * nfs file rename rpc called from nfs_remove() above 1721 */ 1722 int 1723 nfs_renameit(sdvp, scnp, sp) 1724 struct vnode *sdvp; 1725 struct componentname *scnp; 1726 struct sillyrename *sp; 1727 { 1728 return (nfs_renamerpc(sdvp, scnp->cn_nameptr, scnp->cn_namelen, 1729 sdvp, sp->s_name, sp->s_namlen, scnp->cn_cred, scnp->cn_proc)); 1730 } 1731 1732 /* 1733 * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit(). 1734 */ 1735 int 1736 nfs_renamerpc(fdvp, fnameptr, fnamelen, tdvp, tnameptr, tnamelen, cred, proc) 1737 struct vnode *fdvp; 1738 const char *fnameptr; 1739 int fnamelen; 1740 struct vnode *tdvp; 1741 const char *tnameptr; 1742 int tnamelen; 1743 struct ucred *cred; 1744 struct proc *proc; 1745 { 1746 u_int32_t *tl; 1747 caddr_t cp; 1748 int32_t t1, t2; 1749 caddr_t bpos, dpos, cp2; 1750 int error = 0, fwccflag = NFSV3_WCCRATTR, twccflag = NFSV3_WCCRATTR; 1751 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1752 const int v3 = NFS_ISV3(fdvp); 1753 1754 nfsstats.rpccnt[NFSPROC_RENAME]++; 1755 nfsm_reqhead(fdvp, NFSPROC_RENAME, 1756 (NFSX_FH(v3) + NFSX_UNSIGNED)*2 + nfsm_rndup(fnamelen) + 1757 nfsm_rndup(tnamelen)); 1758 nfsm_fhtom(fdvp, v3); 1759 nfsm_strtom(fnameptr, fnamelen, NFS_MAXNAMLEN); 1760 nfsm_fhtom(tdvp, v3); 1761 nfsm_strtom(tnameptr, tnamelen, NFS_MAXNAMLEN); 1762 nfsm_request(fdvp, NFSPROC_RENAME, proc, cred); 1763 if (v3) { 1764 nfsm_wcc_data(fdvp, fwccflag); 1765 nfsm_wcc_data(tdvp, twccflag); 1766 } 1767 nfsm_reqdone; 1768 VTONFS(fdvp)->n_flag |= NMODIFIED; 1769 VTONFS(tdvp)->n_flag |= NMODIFIED; 1770 if (!fwccflag) 1771 VTONFS(fdvp)->n_attrstamp = 0; 1772 if (!twccflag) 1773 VTONFS(tdvp)->n_attrstamp = 0; 1774 return (error); 1775 } 1776 1777 /* 1778 * nfs hard link create call 1779 */ 1780 int 1781 nfs_link(v) 1782 void *v; 1783 { 1784 struct vop_link_args /* { 1785 struct vnode *a_dvp; 1786 struct vnode *a_vp; 1787 struct componentname *a_cnp; 1788 } */ *ap = v; 1789 struct vnode *vp = ap->a_vp; 1790 struct vnode *dvp = ap->a_dvp; 1791 struct componentname *cnp = ap->a_cnp; 1792 u_int32_t *tl; 1793 caddr_t cp; 1794 int32_t t1, t2; 1795 caddr_t bpos, dpos, cp2; 1796 int error = 0, wccflag = NFSV3_WCCRATTR, attrflag = 0; 1797 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1798 /* XXX Should be const and initialised? */ 1799 int v3; 1800 1801 if (dvp->v_mount != vp->v_mount) { 1802 VOP_ABORTOP(dvp, cnp); 1803 vput(dvp); 1804 return (EXDEV); 1805 } 1806 if (dvp != vp) { 1807 error = vn_lock(vp, LK_EXCLUSIVE); 1808 if (error != 0) { 1809 VOP_ABORTOP(dvp, cnp); 1810 vput(dvp); 1811 return error; 1812 } 1813 } 1814 1815 /* 1816 * Push all writes to the server, so that the attribute cache 1817 * doesn't get "out of sync" with the server. 1818 * XXX There should be a better way! 1819 */ 1820 VOP_FSYNC(vp, cnp->cn_cred, FSYNC_WAIT, 0, 0, cnp->cn_proc); 1821 1822 v3 = NFS_ISV3(vp); 1823 nfsstats.rpccnt[NFSPROC_LINK]++; 1824 nfsm_reqhead(vp, NFSPROC_LINK, 1825 NFSX_FH(v3)*2 + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 1826 nfsm_fhtom(vp, v3); 1827 nfsm_fhtom(dvp, v3); 1828 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1829 nfsm_request(vp, NFSPROC_LINK, cnp->cn_proc, cnp->cn_cred); 1830 if (v3) { 1831 nfsm_postop_attr(vp, attrflag); 1832 nfsm_wcc_data(dvp, wccflag); 1833 } 1834 nfsm_reqdone; 1835 PNBUF_PUT(cnp->cn_pnbuf); 1836 VTONFS(dvp)->n_flag |= NMODIFIED; 1837 if (!attrflag) 1838 VTONFS(vp)->n_attrstamp = 0; 1839 if (!wccflag) 1840 VTONFS(dvp)->n_attrstamp = 0; 1841 if (dvp != vp) 1842 VOP_UNLOCK(vp, 0); 1843 vput(dvp); 1844 /* 1845 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 1846 */ 1847 if (error == EEXIST) 1848 error = 0; 1849 return (error); 1850 } 1851 1852 /* 1853 * nfs symbolic link create call 1854 */ 1855 int 1856 nfs_symlink(v) 1857 void *v; 1858 { 1859 struct vop_symlink_args /* { 1860 struct vnode *a_dvp; 1861 struct vnode **a_vpp; 1862 struct componentname *a_cnp; 1863 struct vattr *a_vap; 1864 char *a_target; 1865 } */ *ap = v; 1866 struct vnode *dvp = ap->a_dvp; 1867 struct vattr *vap = ap->a_vap; 1868 struct componentname *cnp = ap->a_cnp; 1869 struct nfsv2_sattr *sp; 1870 u_int32_t *tl; 1871 caddr_t cp; 1872 int32_t t1, t2; 1873 caddr_t bpos, dpos, cp2; 1874 int slen, error = 0, wccflag = NFSV3_WCCRATTR, gotvp; 1875 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1876 struct vnode *newvp = (struct vnode *)0; 1877 const int v3 = NFS_ISV3(dvp); 1878 1879 *ap->a_vpp = NULL; 1880 nfsstats.rpccnt[NFSPROC_SYMLINK]++; 1881 slen = strlen(ap->a_target); 1882 nfsm_reqhead(dvp, NFSPROC_SYMLINK, NFSX_FH(v3) + 2*NFSX_UNSIGNED + 1883 nfsm_rndup(cnp->cn_namelen) + nfsm_rndup(slen) + NFSX_SATTR(v3)); 1884 nfsm_fhtom(dvp, v3); 1885 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1886 if (v3) 1887 nfsm_v3attrbuild(vap, FALSE); 1888 nfsm_strtom(ap->a_target, slen, NFS_MAXPATHLEN); 1889 if (!v3) { 1890 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1891 sp->sa_mode = vtonfsv2_mode(VLNK, vap->va_mode); 1892 sp->sa_uid = nfs_xdrneg1; 1893 sp->sa_gid = nfs_xdrneg1; 1894 sp->sa_size = nfs_xdrneg1; 1895 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1896 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1897 } 1898 nfsm_request(dvp, NFSPROC_SYMLINK, cnp->cn_proc, cnp->cn_cred); 1899 if (v3) { 1900 if (!error) 1901 nfsm_mtofh(dvp, newvp, v3, gotvp); 1902 nfsm_wcc_data(dvp, wccflag); 1903 } 1904 nfsm_reqdone; 1905 /* 1906 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 1907 */ 1908 if (error == EEXIST) 1909 error = 0; 1910 if (error == 0 && newvp == NULL) { 1911 struct nfsnode *np = NULL; 1912 1913 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen, 1914 cnp->cn_cred, cnp->cn_proc, &np); 1915 if (error == 0) 1916 newvp = NFSTOV(np); 1917 } 1918 if (error) { 1919 if (newvp != NULL) 1920 vput(newvp); 1921 } else { 1922 *ap->a_vpp = newvp; 1923 } 1924 PNBUF_PUT(cnp->cn_pnbuf); 1925 VTONFS(dvp)->n_flag |= NMODIFIED; 1926 if (!wccflag) 1927 VTONFS(dvp)->n_attrstamp = 0; 1928 vput(dvp); 1929 return (error); 1930 } 1931 1932 /* 1933 * nfs make dir call 1934 */ 1935 int 1936 nfs_mkdir(v) 1937 void *v; 1938 { 1939 struct vop_mkdir_args /* { 1940 struct vnode *a_dvp; 1941 struct vnode **a_vpp; 1942 struct componentname *a_cnp; 1943 struct vattr *a_vap; 1944 } */ *ap = v; 1945 struct vnode *dvp = ap->a_dvp; 1946 struct vattr *vap = ap->a_vap; 1947 struct componentname *cnp = ap->a_cnp; 1948 struct nfsv2_sattr *sp; 1949 u_int32_t *tl; 1950 caddr_t cp; 1951 int32_t t1, t2; 1952 int len; 1953 struct nfsnode *np = (struct nfsnode *)0; 1954 struct vnode *newvp = (struct vnode *)0; 1955 caddr_t bpos, dpos, cp2; 1956 int error = 0, wccflag = NFSV3_WCCRATTR; 1957 int gotvp = 0; 1958 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1959 const int v3 = NFS_ISV3(dvp); 1960 1961 len = cnp->cn_namelen; 1962 nfsstats.rpccnt[NFSPROC_MKDIR]++; 1963 nfsm_reqhead(dvp, NFSPROC_MKDIR, 1964 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len) + NFSX_SATTR(v3)); 1965 nfsm_fhtom(dvp, v3); 1966 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 1967 if (v3) { 1968 nfsm_v3attrbuild(vap, FALSE); 1969 } else { 1970 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1971 sp->sa_mode = vtonfsv2_mode(VDIR, vap->va_mode); 1972 sp->sa_uid = nfs_xdrneg1; 1973 sp->sa_gid = nfs_xdrneg1; 1974 sp->sa_size = nfs_xdrneg1; 1975 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1976 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1977 } 1978 nfsm_request(dvp, NFSPROC_MKDIR, cnp->cn_proc, cnp->cn_cred); 1979 if (!error) 1980 nfsm_mtofh(dvp, newvp, v3, gotvp); 1981 if (v3) 1982 nfsm_wcc_data(dvp, wccflag); 1983 nfsm_reqdone; 1984 VTONFS(dvp)->n_flag |= NMODIFIED; 1985 if (!wccflag) 1986 VTONFS(dvp)->n_attrstamp = 0; 1987 /* 1988 * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry 1989 * if we can succeed in looking up the directory. 1990 */ 1991 if (error == EEXIST || (!error && !gotvp)) { 1992 if (newvp) { 1993 vput(newvp); 1994 newvp = (struct vnode *)0; 1995 } 1996 error = nfs_lookitup(dvp, cnp->cn_nameptr, len, cnp->cn_cred, 1997 cnp->cn_proc, &np); 1998 if (!error) { 1999 newvp = NFSTOV(np); 2000 if (newvp->v_type != VDIR) 2001 error = EEXIST; 2002 } 2003 } 2004 if (error) { 2005 if (newvp) 2006 vput(newvp); 2007 } else { 2008 if (cnp->cn_flags & MAKEENTRY) 2009 cache_enter(dvp, newvp, cnp); 2010 *ap->a_vpp = newvp; 2011 } 2012 PNBUF_PUT(cnp->cn_pnbuf); 2013 vput(dvp); 2014 return (error); 2015 } 2016 2017 /* 2018 * nfs remove directory call 2019 */ 2020 int 2021 nfs_rmdir(v) 2022 void *v; 2023 { 2024 struct vop_rmdir_args /* { 2025 struct vnode *a_dvp; 2026 struct vnode *a_vp; 2027 struct componentname *a_cnp; 2028 } */ *ap = v; 2029 struct vnode *vp = ap->a_vp; 2030 struct vnode *dvp = ap->a_dvp; 2031 struct componentname *cnp = ap->a_cnp; 2032 u_int32_t *tl; 2033 caddr_t cp; 2034 int32_t t1, t2; 2035 caddr_t bpos, dpos, cp2; 2036 int error = 0, wccflag = NFSV3_WCCRATTR; 2037 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2038 const int v3 = NFS_ISV3(dvp); 2039 2040 if (dvp == vp) { 2041 vrele(dvp); 2042 vput(dvp); 2043 PNBUF_PUT(cnp->cn_pnbuf); 2044 return (EINVAL); 2045 } 2046 nfsstats.rpccnt[NFSPROC_RMDIR]++; 2047 nfsm_reqhead(dvp, NFSPROC_RMDIR, 2048 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 2049 nfsm_fhtom(dvp, v3); 2050 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 2051 nfsm_request(dvp, NFSPROC_RMDIR, cnp->cn_proc, cnp->cn_cred); 2052 if (v3) 2053 nfsm_wcc_data(dvp, wccflag); 2054 nfsm_reqdone; 2055 PNBUF_PUT(cnp->cn_pnbuf); 2056 VTONFS(dvp)->n_flag |= NMODIFIED; 2057 if (!wccflag) 2058 VTONFS(dvp)->n_attrstamp = 0; 2059 cache_purge(dvp); 2060 cache_purge(vp); 2061 vput(vp); 2062 vput(dvp); 2063 /* 2064 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry. 2065 */ 2066 if (error == ENOENT) 2067 error = 0; 2068 return (error); 2069 } 2070 2071 /* 2072 * nfs readdir call 2073 */ 2074 int 2075 nfs_readdir(v) 2076 void *v; 2077 { 2078 struct vop_readdir_args /* { 2079 struct vnode *a_vp; 2080 struct uio *a_uio; 2081 struct ucred *a_cred; 2082 int *a_eofflag; 2083 off_t **a_cookies; 2084 int *a_ncookies; 2085 } */ *ap = v; 2086 struct vnode *vp = ap->a_vp; 2087 struct uio *uio = ap->a_uio; 2088 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2089 char *base = uio->uio_iov->iov_base; 2090 int tresid, error; 2091 size_t count, lost; 2092 struct dirent *dp; 2093 off_t *cookies = NULL; 2094 int ncookies = 0, nc; 2095 2096 if (vp->v_type != VDIR) 2097 return (EPERM); 2098 2099 lost = uio->uio_resid & (NFS_DIRFRAGSIZ - 1); 2100 count = uio->uio_resid - lost; 2101 if (count <= 0) 2102 return (EINVAL); 2103 2104 /* 2105 * Call nfs_bioread() to do the real work. 2106 */ 2107 tresid = uio->uio_resid = count; 2108 error = nfs_bioread(vp, uio, 0, ap->a_cred, 2109 ap->a_cookies ? NFSBIO_CACHECOOKIES : 0); 2110 2111 if (!error && ap->a_cookies) { 2112 ncookies = count / 16; 2113 cookies = malloc(sizeof (off_t) * ncookies, M_TEMP, M_WAITOK); 2114 *ap->a_cookies = cookies; 2115 } 2116 2117 if (!error && uio->uio_resid == tresid) { 2118 uio->uio_resid += lost; 2119 nfsstats.direofcache_misses++; 2120 if (ap->a_cookies) 2121 *ap->a_ncookies = 0; 2122 *ap->a_eofflag = 1; 2123 return (0); 2124 } 2125 2126 if (!error && ap->a_cookies) { 2127 /* 2128 * Only the NFS server and emulations use cookies, and they 2129 * load the directory block into system space, so we can 2130 * just look at it directly. 2131 */ 2132 if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1) 2133 panic("nfs_readdir: lost in space"); 2134 for (nc = 0; ncookies-- && 2135 base < (char *)uio->uio_iov->iov_base; nc++){ 2136 dp = (struct dirent *) base; 2137 if (dp->d_reclen == 0) 2138 break; 2139 if (nmp->nm_flag & NFSMNT_XLATECOOKIE) 2140 *(cookies++) = (off_t)NFS_GETCOOKIE32(dp); 2141 else 2142 *(cookies++) = NFS_GETCOOKIE(dp); 2143 base += dp->d_reclen; 2144 } 2145 uio->uio_resid += 2146 ((caddr_t)uio->uio_iov->iov_base - base); 2147 uio->uio_iov->iov_len += 2148 ((caddr_t)uio->uio_iov->iov_base - base); 2149 uio->uio_iov->iov_base = base; 2150 *ap->a_ncookies = nc; 2151 } 2152 2153 uio->uio_resid += lost; 2154 *ap->a_eofflag = 0; 2155 return (error); 2156 } 2157 2158 /* 2159 * Readdir rpc call. 2160 * Called from below the buffer cache by nfs_doio(). 2161 */ 2162 int 2163 nfs_readdirrpc(vp, uiop, cred) 2164 struct vnode *vp; 2165 struct uio *uiop; 2166 struct ucred *cred; 2167 { 2168 int len, left; 2169 struct dirent *dp = NULL; 2170 u_int32_t *tl; 2171 caddr_t cp; 2172 int32_t t1, t2; 2173 caddr_t bpos, dpos, cp2; 2174 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2175 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2176 struct nfsnode *dnp = VTONFS(vp); 2177 u_quad_t fileno; 2178 int error = 0, tlen, more_dirs = 1, blksiz = 0, bigenough = 1; 2179 int attrflag, nrpcs = 0, reclen; 2180 const int v3 = NFS_ISV3(vp); 2181 2182 #ifdef DIAGNOSTIC 2183 /* 2184 * Should be called from buffer cache, so only amount of 2185 * NFS_DIRBLKSIZ will be requested. 2186 */ 2187 if (uiop->uio_iovcnt != 1 || (uiop->uio_resid & (NFS_DIRBLKSIZ - 1))) 2188 panic("nfs readdirrpc bad uio"); 2189 #endif 2190 2191 /* 2192 * Loop around doing readdir rpc's of size nm_readdirsize 2193 * truncated to a multiple of NFS_DIRFRAGSIZ. 2194 * The stopping criteria is EOF or buffer full. 2195 */ 2196 while (more_dirs && bigenough) { 2197 /* 2198 * Heuristic: don't bother to do another RPC to further 2199 * fill up this block if there is not much room left. (< 50% 2200 * of the readdir RPC size). This wastes some buffer space 2201 * but can save up to 50% in RPC calls. 2202 */ 2203 if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { 2204 bigenough = 0; 2205 break; 2206 } 2207 nfsstats.rpccnt[NFSPROC_READDIR]++; 2208 nfsm_reqhead(vp, NFSPROC_READDIR, NFSX_FH(v3) + 2209 NFSX_READDIR(v3)); 2210 nfsm_fhtom(vp, v3); 2211 if (v3) { 2212 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 2213 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { 2214 txdr_swapcookie3(uiop->uio_offset, tl); 2215 } else { 2216 txdr_cookie3(uiop->uio_offset, tl); 2217 } 2218 tl += 2; 2219 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2220 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2221 } else { 2222 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2223 *tl++ = txdr_unsigned(uiop->uio_offset); 2224 } 2225 *tl = txdr_unsigned(nmp->nm_readdirsize); 2226 nfsm_request(vp, NFSPROC_READDIR, uiop->uio_procp, cred); 2227 nrpcs++; 2228 if (v3) { 2229 nfsm_postop_attr(vp, attrflag); 2230 if (!error) { 2231 nfsm_dissect(tl, u_int32_t *, 2232 2 * NFSX_UNSIGNED); 2233 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2234 dnp->n_cookieverf.nfsuquad[1] = *tl; 2235 } else { 2236 m_freem(mrep); 2237 goto nfsmout; 2238 } 2239 } 2240 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2241 more_dirs = fxdr_unsigned(int, *tl); 2242 2243 /* loop thru the dir entries, doctoring them to 4bsd form */ 2244 while (more_dirs && bigenough) { 2245 if (v3) { 2246 nfsm_dissect(tl, u_int32_t *, 2247 3 * NFSX_UNSIGNED); 2248 fileno = fxdr_hyper(tl); 2249 len = fxdr_unsigned(int, *(tl + 2)); 2250 } else { 2251 nfsm_dissect(tl, u_int32_t *, 2252 2 * NFSX_UNSIGNED); 2253 fileno = fxdr_unsigned(u_quad_t, *tl++); 2254 len = fxdr_unsigned(int, *tl); 2255 } 2256 if (len <= 0 || len > NFS_MAXNAMLEN) { 2257 error = EBADRPC; 2258 m_freem(mrep); 2259 goto nfsmout; 2260 } 2261 tlen = nfsm_rndup(len); 2262 if (tlen == len) 2263 tlen += 4; /* To ensure null termination */ 2264 tlen += sizeof (off_t) + sizeof (int); 2265 reclen = ALIGN(tlen + DIRHDSIZ); 2266 tlen = reclen - DIRHDSIZ; 2267 left = NFS_DIRFRAGSIZ - blksiz; 2268 if (reclen > left) { 2269 dp->d_reclen += left; 2270 uiop->uio_iov->iov_base = 2271 (caddr_t)uiop->uio_iov->iov_base + left; 2272 uiop->uio_iov->iov_len -= left; 2273 uiop->uio_resid -= left; 2274 blksiz = 0; 2275 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2276 } 2277 if (reclen > uiop->uio_resid) 2278 bigenough = 0; 2279 if (bigenough) { 2280 dp = (struct dirent *)uiop->uio_iov->iov_base; 2281 dp->d_fileno = (int)fileno; 2282 dp->d_namlen = len; 2283 dp->d_reclen = reclen; 2284 dp->d_type = DT_UNKNOWN; 2285 blksiz += dp->d_reclen; 2286 if (blksiz == NFS_DIRFRAGSIZ) 2287 blksiz = 0; 2288 uiop->uio_resid -= DIRHDSIZ; 2289 uiop->uio_iov->iov_base = 2290 (caddr_t)uiop->uio_iov->iov_base + DIRHDSIZ; 2291 uiop->uio_iov->iov_len -= DIRHDSIZ; 2292 nfsm_mtouio(uiop, len); 2293 cp = uiop->uio_iov->iov_base; 2294 tlen -= len; 2295 *cp = '\0'; /* null terminate */ 2296 uiop->uio_iov->iov_base = 2297 (caddr_t)uiop->uio_iov->iov_base + tlen; 2298 uiop->uio_iov->iov_len -= tlen; 2299 uiop->uio_resid -= tlen; 2300 } else 2301 nfsm_adv(nfsm_rndup(len)); 2302 if (v3) { 2303 nfsm_dissect(tl, u_int32_t *, 2304 3 * NFSX_UNSIGNED); 2305 } else { 2306 nfsm_dissect(tl, u_int32_t *, 2307 2 * NFSX_UNSIGNED); 2308 } 2309 if (bigenough) { 2310 if (v3) { 2311 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) 2312 uiop->uio_offset = 2313 fxdr_swapcookie3(tl); 2314 else 2315 uiop->uio_offset = 2316 fxdr_cookie3(tl); 2317 } 2318 else { 2319 uiop->uio_offset = 2320 fxdr_unsigned(off_t, *tl); 2321 } 2322 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2323 } 2324 if (v3) 2325 tl += 2; 2326 else 2327 tl++; 2328 more_dirs = fxdr_unsigned(int, *tl); 2329 } 2330 /* 2331 * If at end of rpc data, get the eof boolean 2332 */ 2333 if (!more_dirs) { 2334 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2335 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2336 } 2337 m_freem(mrep); 2338 } 2339 /* 2340 * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ 2341 * by increasing d_reclen for the last record. 2342 */ 2343 if (blksiz > 0) { 2344 left = NFS_DIRFRAGSIZ - blksiz; 2345 dp->d_reclen += left; 2346 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2347 uiop->uio_iov->iov_base = (caddr_t)uiop->uio_iov->iov_base + 2348 left; 2349 uiop->uio_iov->iov_len -= left; 2350 uiop->uio_resid -= left; 2351 } 2352 2353 /* 2354 * We are now either at the end of the directory or have filled the 2355 * block. 2356 */ 2357 if (bigenough) 2358 dnp->n_direofoffset = uiop->uio_offset; 2359 nfsmout: 2360 return (error); 2361 } 2362 2363 /* 2364 * NFS V3 readdir plus RPC. Used in place of nfs_readdirrpc(). 2365 */ 2366 int 2367 nfs_readdirplusrpc(vp, uiop, cred) 2368 struct vnode *vp; 2369 struct uio *uiop; 2370 struct ucred *cred; 2371 { 2372 int len, left; 2373 struct dirent *dp = NULL; 2374 u_int32_t *tl; 2375 caddr_t cp; 2376 int32_t t1, t2; 2377 struct vnode *newvp; 2378 caddr_t bpos, dpos, cp2; 2379 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2380 struct nameidata nami, *ndp = &nami; 2381 struct componentname *cnp = &ndp->ni_cnd; 2382 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2383 struct nfsnode *dnp = VTONFS(vp), *np; 2384 nfsfh_t *fhp; 2385 u_quad_t fileno; 2386 int error = 0, tlen, more_dirs = 1, blksiz = 0, doit, bigenough = 1, i; 2387 int attrflag, fhsize, nrpcs = 0, reclen; 2388 struct nfs_fattr fattr, *fp; 2389 2390 #ifdef DIAGNOSTIC 2391 if (uiop->uio_iovcnt != 1 || (uiop->uio_resid & (NFS_DIRBLKSIZ - 1))) 2392 panic("nfs readdirplusrpc bad uio"); 2393 #endif 2394 ndp->ni_dvp = vp; 2395 newvp = NULLVP; 2396 2397 /* 2398 * Loop around doing readdir rpc's of size nm_readdirsize 2399 * truncated to a multiple of NFS_DIRFRAGSIZ. 2400 * The stopping criteria is EOF or buffer full. 2401 */ 2402 while (more_dirs && bigenough) { 2403 if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { 2404 bigenough = 0; 2405 break; 2406 } 2407 nfsstats.rpccnt[NFSPROC_READDIRPLUS]++; 2408 nfsm_reqhead(vp, NFSPROC_READDIRPLUS, 2409 NFSX_FH(1) + 6 * NFSX_UNSIGNED); 2410 nfsm_fhtom(vp, 1); 2411 nfsm_build(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 2412 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { 2413 txdr_swapcookie3(uiop->uio_offset, tl); 2414 } else { 2415 txdr_cookie3(uiop->uio_offset, tl); 2416 } 2417 tl += 2; 2418 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2419 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2420 *tl++ = txdr_unsigned(nmp->nm_readdirsize); 2421 *tl = txdr_unsigned(nmp->nm_rsize); 2422 nfsm_request(vp, NFSPROC_READDIRPLUS, uiop->uio_procp, cred); 2423 nfsm_postop_attr(vp, attrflag); 2424 if (error) { 2425 m_freem(mrep); 2426 goto nfsmout; 2427 } 2428 nrpcs++; 2429 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2430 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2431 dnp->n_cookieverf.nfsuquad[1] = *tl++; 2432 more_dirs = fxdr_unsigned(int, *tl); 2433 2434 /* loop thru the dir entries, doctoring them to 4bsd form */ 2435 while (more_dirs && bigenough) { 2436 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2437 fileno = fxdr_hyper(tl); 2438 len = fxdr_unsigned(int, *(tl + 2)); 2439 if (len <= 0 || len > NFS_MAXNAMLEN) { 2440 error = EBADRPC; 2441 m_freem(mrep); 2442 goto nfsmout; 2443 } 2444 tlen = nfsm_rndup(len); 2445 if (tlen == len) 2446 tlen += 4; /* To ensure null termination*/ 2447 tlen += sizeof (off_t) + sizeof (int); 2448 reclen = ALIGN(tlen + DIRHDSIZ); 2449 tlen = reclen - DIRHDSIZ; 2450 left = NFS_DIRFRAGSIZ - blksiz; 2451 if (reclen > left) { 2452 /* 2453 * DIRFRAGSIZ is aligned, no need to align 2454 * again here. 2455 */ 2456 dp->d_reclen += left; 2457 uiop->uio_iov->iov_base = 2458 (caddr_t)uiop->uio_iov->iov_base + left; 2459 uiop->uio_iov->iov_len -= left; 2460 uiop->uio_resid -= left; 2461 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2462 blksiz = 0; 2463 } 2464 if (reclen > uiop->uio_resid) 2465 bigenough = 0; 2466 if (bigenough) { 2467 dp = (struct dirent *)uiop->uio_iov->iov_base; 2468 dp->d_fileno = (int)fileno; 2469 dp->d_namlen = len; 2470 dp->d_reclen = reclen; 2471 dp->d_type = DT_UNKNOWN; 2472 blksiz += dp->d_reclen; 2473 if (blksiz == NFS_DIRFRAGSIZ) 2474 blksiz = 0; 2475 uiop->uio_resid -= DIRHDSIZ; 2476 uiop->uio_iov->iov_base = 2477 (caddr_t)uiop->uio_iov->iov_base + 2478 DIRHDSIZ; 2479 uiop->uio_iov->iov_len -= DIRHDSIZ; 2480 cnp->cn_nameptr = uiop->uio_iov->iov_base; 2481 cnp->cn_namelen = len; 2482 nfsm_mtouio(uiop, len); 2483 cp = uiop->uio_iov->iov_base; 2484 tlen -= len; 2485 *cp = '\0'; 2486 uiop->uio_iov->iov_base = 2487 (caddr_t)uiop->uio_iov->iov_base + tlen; 2488 uiop->uio_iov->iov_len -= tlen; 2489 uiop->uio_resid -= tlen; 2490 } else 2491 nfsm_adv(nfsm_rndup(len)); 2492 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2493 if (bigenough) { 2494 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) 2495 uiop->uio_offset = 2496 fxdr_swapcookie3(tl); 2497 else 2498 uiop->uio_offset = 2499 fxdr_cookie3(tl); 2500 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2501 } 2502 tl += 2; 2503 2504 /* 2505 * Since the attributes are before the file handle 2506 * (sigh), we must skip over the attributes and then 2507 * come back and get them. 2508 */ 2509 attrflag = fxdr_unsigned(int, *tl); 2510 if (attrflag) { 2511 nfsm_dissect(fp, struct nfs_fattr *, NFSX_V3FATTR); 2512 memcpy(&fattr, fp, NFSX_V3FATTR); 2513 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2514 doit = fxdr_unsigned(int, *tl); 2515 if (doit) { 2516 nfsm_getfh(fhp, fhsize, 1); 2517 if (NFS_CMPFH(dnp, fhp, fhsize)) { 2518 VREF(vp); 2519 newvp = vp; 2520 np = dnp; 2521 } else { 2522 error = nfs_nget(vp->v_mount, fhp, 2523 fhsize, &np); 2524 if (!error) 2525 newvp = NFSTOV(np); 2526 } 2527 if (!error) { 2528 const char *cp; 2529 2530 nfs_loadattrcache(&newvp, &fattr, 0); 2531 dp->d_type = 2532 IFTODT(VTTOIF(np->n_vattr->va_type)); 2533 ndp->ni_vp = newvp; 2534 cp = cnp->cn_nameptr + cnp->cn_namelen; 2535 cnp->cn_hash = 2536 namei_hash(cnp->cn_nameptr, &cp); 2537 if (cnp->cn_namelen <= NCHNAMLEN) 2538 cache_enter(ndp->ni_dvp, ndp->ni_vp, 2539 cnp); 2540 } 2541 } 2542 } else { 2543 /* Just skip over the file handle */ 2544 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2545 i = fxdr_unsigned(int, *tl); 2546 nfsm_adv(nfsm_rndup(i)); 2547 } 2548 if (newvp != NULLVP) { 2549 if (newvp == vp) 2550 vrele(newvp); 2551 else 2552 vput(newvp); 2553 newvp = NULLVP; 2554 } 2555 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2556 more_dirs = fxdr_unsigned(int, *tl); 2557 } 2558 /* 2559 * If at end of rpc data, get the eof boolean 2560 */ 2561 if (!more_dirs) { 2562 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2563 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2564 } 2565 m_freem(mrep); 2566 } 2567 /* 2568 * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ 2569 * by increasing d_reclen for the last record. 2570 */ 2571 if (blksiz > 0) { 2572 left = NFS_DIRFRAGSIZ - blksiz; 2573 dp->d_reclen += left; 2574 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2575 uiop->uio_iov->iov_base = (caddr_t)uiop->uio_iov->iov_base + 2576 left; 2577 uiop->uio_iov->iov_len -= left; 2578 uiop->uio_resid -= left; 2579 } 2580 2581 /* 2582 * We are now either at the end of the directory or have filled the 2583 * block. 2584 */ 2585 if (bigenough) 2586 dnp->n_direofoffset = uiop->uio_offset; 2587 nfsmout: 2588 if (newvp != NULLVP) { 2589 if(newvp == vp) 2590 vrele(newvp); 2591 else 2592 vput(newvp); 2593 } 2594 return (error); 2595 } 2596 static char hextoasc[] = "0123456789abcdef"; 2597 2598 /* 2599 * Silly rename. To make the NFS filesystem that is stateless look a little 2600 * more like the "ufs" a remove of an active vnode is translated to a rename 2601 * to a funny looking filename that is removed by nfs_inactive on the 2602 * nfsnode. There is the potential for another process on a different client 2603 * to create the same funny name between the nfs_lookitup() fails and the 2604 * nfs_rename() completes, but... 2605 */ 2606 int 2607 nfs_sillyrename(dvp, vp, cnp) 2608 struct vnode *dvp, *vp; 2609 struct componentname *cnp; 2610 { 2611 struct sillyrename *sp; 2612 struct nfsnode *np; 2613 int error; 2614 short pid; 2615 2616 cache_purge(dvp); 2617 np = VTONFS(vp); 2618 #ifndef DIAGNOSTIC 2619 if (vp->v_type == VDIR) 2620 panic("nfs: sillyrename dir"); 2621 #endif 2622 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename), 2623 M_NFSREQ, M_WAITOK); 2624 sp->s_cred = crdup(cnp->cn_cred); 2625 sp->s_dvp = dvp; 2626 VREF(dvp); 2627 2628 /* Fudge together a funny name */ 2629 pid = cnp->cn_proc->p_pid; 2630 memcpy(sp->s_name, ".nfsAxxxx4.4", 13); 2631 sp->s_namlen = 12; 2632 sp->s_name[8] = hextoasc[pid & 0xf]; 2633 sp->s_name[7] = hextoasc[(pid >> 4) & 0xf]; 2634 sp->s_name[6] = hextoasc[(pid >> 8) & 0xf]; 2635 sp->s_name[5] = hextoasc[(pid >> 12) & 0xf]; 2636 2637 /* Try lookitups until we get one that isn't there */ 2638 while (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2639 cnp->cn_proc, (struct nfsnode **)0) == 0) { 2640 sp->s_name[4]++; 2641 if (sp->s_name[4] > 'z') { 2642 error = EINVAL; 2643 goto bad; 2644 } 2645 } 2646 error = nfs_renameit(dvp, cnp, sp); 2647 if (error) 2648 goto bad; 2649 error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2650 cnp->cn_proc, &np); 2651 np->n_sillyrename = sp; 2652 return (0); 2653 bad: 2654 vrele(sp->s_dvp); 2655 crfree(sp->s_cred); 2656 free((caddr_t)sp, M_NFSREQ); 2657 return (error); 2658 } 2659 2660 /* 2661 * Look up a file name and optionally either update the file handle or 2662 * allocate an nfsnode, depending on the value of npp. 2663 * npp == NULL --> just do the lookup 2664 * *npp == NULL --> allocate a new nfsnode and make sure attributes are 2665 * handled too 2666 * *npp != NULL --> update the file handle in the vnode 2667 */ 2668 int 2669 nfs_lookitup(dvp, name, len, cred, procp, npp) 2670 struct vnode *dvp; 2671 const char *name; 2672 int len; 2673 struct ucred *cred; 2674 struct proc *procp; 2675 struct nfsnode **npp; 2676 { 2677 u_int32_t *tl; 2678 caddr_t cp; 2679 int32_t t1, t2; 2680 struct vnode *newvp = (struct vnode *)0; 2681 struct nfsnode *np, *dnp = VTONFS(dvp); 2682 caddr_t bpos, dpos, cp2; 2683 int error = 0, fhlen, attrflag; 2684 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2685 nfsfh_t *nfhp; 2686 const int v3 = NFS_ISV3(dvp); 2687 2688 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 2689 nfsm_reqhead(dvp, NFSPROC_LOOKUP, 2690 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 2691 nfsm_fhtom(dvp, v3); 2692 nfsm_strtom(name, len, NFS_MAXNAMLEN); 2693 nfsm_request(dvp, NFSPROC_LOOKUP, procp, cred); 2694 if (npp && !error) { 2695 nfsm_getfh(nfhp, fhlen, v3); 2696 if (*npp) { 2697 np = *npp; 2698 if (np->n_fhsize > NFS_SMALLFH && fhlen <= NFS_SMALLFH) { 2699 free((caddr_t)np->n_fhp, M_NFSBIGFH); 2700 np->n_fhp = &np->n_fh; 2701 } else if (np->n_fhsize <= NFS_SMALLFH && fhlen>NFS_SMALLFH) 2702 np->n_fhp =(nfsfh_t *)malloc(fhlen,M_NFSBIGFH,M_WAITOK); 2703 memcpy((caddr_t)np->n_fhp, (caddr_t)nfhp, fhlen); 2704 np->n_fhsize = fhlen; 2705 newvp = NFSTOV(np); 2706 } else if (NFS_CMPFH(dnp, nfhp, fhlen)) { 2707 VREF(dvp); 2708 newvp = dvp; 2709 } else { 2710 error = nfs_nget(dvp->v_mount, nfhp, fhlen, &np); 2711 if (error) { 2712 m_freem(mrep); 2713 return (error); 2714 } 2715 newvp = NFSTOV(np); 2716 } 2717 if (v3) { 2718 nfsm_postop_attr(newvp, attrflag); 2719 if (!attrflag && *npp == NULL) { 2720 m_freem(mrep); 2721 vput(newvp); 2722 return (ENOENT); 2723 } 2724 } else 2725 nfsm_loadattr(newvp, (struct vattr *)0); 2726 } 2727 nfsm_reqdone; 2728 if (npp && *npp == NULL) { 2729 if (error) { 2730 if (newvp) 2731 vput(newvp); 2732 } else 2733 *npp = np; 2734 } 2735 return (error); 2736 } 2737 2738 /* 2739 * Nfs Version 3 commit rpc 2740 */ 2741 int 2742 nfs_commit(vp, offset, cnt, procp) 2743 struct vnode *vp; 2744 off_t offset; 2745 uint32_t cnt; 2746 struct proc *procp; 2747 { 2748 caddr_t cp; 2749 u_int32_t *tl; 2750 int32_t t1, t2; 2751 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2752 caddr_t bpos, dpos, cp2; 2753 int error = 0, wccflag = NFSV3_WCCRATTR; 2754 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2755 2756 #ifdef fvdl_debug 2757 printf("commit %lu - %lu\n", (unsigned long)offset, 2758 (unsigned long)(offset + cnt)); 2759 #endif 2760 2761 if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0) 2762 return (0); 2763 nfsstats.rpccnt[NFSPROC_COMMIT]++; 2764 nfsm_reqhead(vp, NFSPROC_COMMIT, NFSX_FH(1)); 2765 nfsm_fhtom(vp, 1); 2766 nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2767 txdr_hyper(offset, tl); 2768 tl += 2; 2769 *tl = txdr_unsigned(cnt); 2770 nfsm_request(vp, NFSPROC_COMMIT, procp, VTONFS(vp)->n_wcred); 2771 nfsm_wcc_data(vp, wccflag); 2772 if (!error) { 2773 nfsm_dissect(tl, u_int32_t *, NFSX_V3WRITEVERF); 2774 if (memcmp((caddr_t)nmp->nm_verf, (caddr_t)tl, 2775 NFSX_V3WRITEVERF)) { 2776 memcpy((caddr_t)nmp->nm_verf, (caddr_t)tl, 2777 NFSX_V3WRITEVERF); 2778 error = NFSERR_STALEWRITEVERF; 2779 } 2780 } 2781 nfsm_reqdone; 2782 return (error); 2783 } 2784 2785 /* 2786 * Kludge City.. 2787 * - make nfs_bmap() essentially a no-op that does no translation 2788 * - do nfs_strategy() by doing I/O with nfs_readrpc/nfs_writerpc 2789 * (Maybe I could use the process's page mapping, but I was concerned that 2790 * Kernel Write might not be enabled and also figured copyout() would do 2791 * a lot more work than memcpy() and also it currently happens in the 2792 * context of the swapper process (2). 2793 */ 2794 int 2795 nfs_bmap(v) 2796 void *v; 2797 { 2798 struct vop_bmap_args /* { 2799 struct vnode *a_vp; 2800 daddr_t a_bn; 2801 struct vnode **a_vpp; 2802 daddr_t *a_bnp; 2803 int *a_runp; 2804 } */ *ap = v; 2805 struct vnode *vp = ap->a_vp; 2806 int bshift = vp->v_mount->mnt_fs_bshift - vp->v_mount->mnt_dev_bshift; 2807 2808 if (ap->a_vpp != NULL) 2809 *ap->a_vpp = vp; 2810 if (ap->a_bnp != NULL) 2811 *ap->a_bnp = ap->a_bn << bshift; 2812 if (ap->a_runp != NULL) 2813 *ap->a_runp = 1024 * 1024; /* XXX */ 2814 return (0); 2815 } 2816 2817 /* 2818 * Strategy routine. 2819 * For async requests when nfsiod(s) are running, queue the request by 2820 * calling nfs_asyncio(), otherwise just all nfs_doio() to do the 2821 * request. 2822 */ 2823 int 2824 nfs_strategy(v) 2825 void *v; 2826 { 2827 struct vop_strategy_args *ap = v; 2828 struct buf *bp = ap->a_bp; 2829 struct proc *p; 2830 int error = 0; 2831 2832 if ((bp->b_flags & (B_PHYS|B_ASYNC)) == (B_PHYS|B_ASYNC)) 2833 panic("nfs physio/async"); 2834 if (bp->b_flags & B_ASYNC) 2835 p = NULL; 2836 else 2837 p = curproc; /* XXX */ 2838 2839 /* 2840 * If the op is asynchronous and an i/o daemon is waiting 2841 * queue the request, wake it up and wait for completion 2842 * otherwise just do it ourselves. 2843 */ 2844 2845 if ((bp->b_flags & B_ASYNC) == 0 || 2846 nfs_asyncio(bp)) 2847 error = nfs_doio(bp, p); 2848 return (error); 2849 } 2850 2851 /* 2852 * fsync vnode op. Just call nfs_flush() with commit == 1. 2853 */ 2854 /* ARGSUSED */ 2855 int 2856 nfs_fsync(v) 2857 void *v; 2858 { 2859 struct vop_fsync_args /* { 2860 struct vnodeop_desc *a_desc; 2861 struct vnode * a_vp; 2862 struct ucred * a_cred; 2863 int a_flags; 2864 off_t offlo; 2865 off_t offhi; 2866 struct proc * a_p; 2867 } */ *ap = v; 2868 2869 return (nfs_flush(ap->a_vp, ap->a_cred, 2870 (ap->a_flags & FSYNC_WAIT) != 0 ? MNT_WAIT : 0, ap->a_p, 1)); 2871 } 2872 2873 /* 2874 * Flush all the data associated with a vnode. 2875 */ 2876 int 2877 nfs_flush(vp, cred, waitfor, p, commit) 2878 struct vnode *vp; 2879 struct ucred *cred; 2880 int waitfor; 2881 struct proc *p; 2882 int commit; 2883 { 2884 struct nfsnode *np = VTONFS(vp); 2885 int error; 2886 int flushflags = PGO_ALLPAGES|PGO_CLEANIT|PGO_SYNCIO; 2887 UVMHIST_FUNC("nfs_flush"); UVMHIST_CALLED(ubchist); 2888 2889 simple_lock(&vp->v_interlock); 2890 error = VOP_PUTPAGES(vp, 0, 0, flushflags); 2891 if (np->n_flag & NWRITEERR) { 2892 error = np->n_error; 2893 np->n_flag &= ~NWRITEERR; 2894 } 2895 UVMHIST_LOG(ubchist, "returning %d", error,0,0,0); 2896 return (error); 2897 } 2898 2899 /* 2900 * Return POSIX pathconf information applicable to nfs. 2901 * 2902 * N.B. The NFS V2 protocol doesn't support this RPC. 2903 */ 2904 /* ARGSUSED */ 2905 int 2906 nfs_pathconf(v) 2907 void *v; 2908 { 2909 struct vop_pathconf_args /* { 2910 struct vnode *a_vp; 2911 int a_name; 2912 register_t *a_retval; 2913 } */ *ap = v; 2914 struct nfsv3_pathconf *pcp; 2915 struct vnode *vp = ap->a_vp; 2916 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2917 int32_t t1, t2; 2918 u_int32_t *tl; 2919 caddr_t bpos, dpos, cp, cp2; 2920 int error = 0, attrflag; 2921 #ifndef NFS_V2_ONLY 2922 struct nfsmount *nmp; 2923 unsigned int l; 2924 u_int64_t maxsize; 2925 #endif 2926 const int v3 = NFS_ISV3(vp); 2927 2928 switch (ap->a_name) { 2929 /* Names that can be resolved locally. */ 2930 case _PC_PIPE_BUF: 2931 *ap->a_retval = PIPE_BUF; 2932 break; 2933 case _PC_SYNC_IO: 2934 *ap->a_retval = 1; 2935 break; 2936 /* Names that cannot be resolved locally; do an RPC, if possible. */ 2937 case _PC_LINK_MAX: 2938 case _PC_NAME_MAX: 2939 case _PC_CHOWN_RESTRICTED: 2940 case _PC_NO_TRUNC: 2941 if (!v3) { 2942 error = EINVAL; 2943 break; 2944 } 2945 nfsstats.rpccnt[NFSPROC_PATHCONF]++; 2946 nfsm_reqhead(vp, NFSPROC_PATHCONF, NFSX_FH(1)); 2947 nfsm_fhtom(vp, 1); 2948 nfsm_request(vp, NFSPROC_PATHCONF, 2949 curproc, curproc->p_ucred); /* XXX */ 2950 nfsm_postop_attr(vp, attrflag); 2951 if (!error) { 2952 nfsm_dissect(pcp, struct nfsv3_pathconf *, 2953 NFSX_V3PATHCONF); 2954 switch (ap->a_name) { 2955 case _PC_LINK_MAX: 2956 *ap->a_retval = 2957 fxdr_unsigned(register_t, pcp->pc_linkmax); 2958 break; 2959 case _PC_NAME_MAX: 2960 *ap->a_retval = 2961 fxdr_unsigned(register_t, pcp->pc_namemax); 2962 break; 2963 case _PC_CHOWN_RESTRICTED: 2964 *ap->a_retval = 2965 (pcp->pc_chownrestricted == nfs_true); 2966 break; 2967 case _PC_NO_TRUNC: 2968 *ap->a_retval = 2969 (pcp->pc_notrunc == nfs_true); 2970 break; 2971 } 2972 } 2973 nfsm_reqdone; 2974 break; 2975 case _PC_FILESIZEBITS: 2976 #ifndef NFS_V2_ONLY 2977 if (v3) { 2978 nmp = VFSTONFS(vp->v_mount); 2979 if ((nmp->nm_iflag & NFSMNT_GOTFSINFO) == 0) 2980 if ((error = nfs_fsinfo(nmp, vp, 2981 curproc->p_ucred, 2982 curproc)) != 0) /* XXX */ 2983 break; 2984 for (l = 0, maxsize = nmp->nm_maxfilesize; 2985 (maxsize >> l) > 0; l++) 2986 ; 2987 *ap->a_retval = l + 1; 2988 } else 2989 #endif 2990 { 2991 *ap->a_retval = 32; /* NFS V2 limitation */ 2992 } 2993 break; 2994 default: 2995 error = EINVAL; 2996 break; 2997 } 2998 2999 return (error); 3000 } 3001 3002 /* 3003 * NFS advisory byte-level locks. 3004 */ 3005 int 3006 nfs_advlock(v) 3007 void *v; 3008 { 3009 struct vop_advlock_args /* { 3010 struct vnode *a_vp; 3011 caddr_t a_id; 3012 int a_op; 3013 struct flock *a_fl; 3014 int a_flags; 3015 } */ *ap = v; 3016 struct nfsnode *np = VTONFS(ap->a_vp); 3017 3018 return lf_advlock(ap, &np->n_lockf, np->n_size); 3019 } 3020 3021 /* 3022 * Print out the contents of an nfsnode. 3023 */ 3024 int 3025 nfs_print(v) 3026 void *v; 3027 { 3028 struct vop_print_args /* { 3029 struct vnode *a_vp; 3030 } */ *ap = v; 3031 struct vnode *vp = ap->a_vp; 3032 struct nfsnode *np = VTONFS(vp); 3033 3034 printf("tag VT_NFS, fileid %ld fsid 0x%lx", 3035 np->n_vattr->va_fileid, np->n_vattr->va_fsid); 3036 if (vp->v_type == VFIFO) 3037 fifo_printinfo(vp); 3038 printf("\n"); 3039 return (0); 3040 } 3041 3042 /* 3043 * NFS file truncation. 3044 */ 3045 int 3046 nfs_truncate(v) 3047 void *v; 3048 { 3049 #if 0 3050 struct vop_truncate_args /* { 3051 struct vnode *a_vp; 3052 off_t a_length; 3053 int a_flags; 3054 struct ucred *a_cred; 3055 struct proc *a_p; 3056 } */ *ap = v; 3057 #endif 3058 3059 /* Use nfs_setattr */ 3060 return (EOPNOTSUPP); 3061 } 3062 3063 /* 3064 * NFS update. 3065 */ 3066 int 3067 nfs_update(v) 3068 void *v; 3069 #if 0 3070 struct vop_update_args /* { 3071 struct vnode *a_vp; 3072 struct timespec *a_ta; 3073 struct timespec *a_tm; 3074 int a_waitfor; 3075 } */ *ap = v; 3076 #endif 3077 { 3078 3079 /* Use nfs_setattr */ 3080 return (EOPNOTSUPP); 3081 } 3082 3083 /* 3084 * Just call bwrite(). 3085 */ 3086 int 3087 nfs_bwrite(v) 3088 void *v; 3089 { 3090 struct vop_bwrite_args /* { 3091 struct vnode *a_bp; 3092 } */ *ap = v; 3093 3094 return (bwrite(ap->a_bp)); 3095 } 3096 3097 /* 3098 * nfs special file access vnode op. 3099 * Essentially just get vattr and then imitate iaccess() since the device is 3100 * local to the client. 3101 */ 3102 int 3103 nfsspec_access(v) 3104 void *v; 3105 { 3106 struct vop_access_args /* { 3107 struct vnode *a_vp; 3108 int a_mode; 3109 struct ucred *a_cred; 3110 struct proc *a_p; 3111 } */ *ap = v; 3112 struct vattr va; 3113 struct vnode *vp = ap->a_vp; 3114 int error; 3115 3116 error = VOP_GETATTR(vp, &va, ap->a_cred, ap->a_p); 3117 if (error) 3118 return (error); 3119 3120 /* 3121 * Disallow write attempts on filesystems mounted read-only; 3122 * unless the file is a socket, fifo, or a block or character 3123 * device resident on the filesystem. 3124 */ 3125 if ((ap->a_mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) { 3126 switch (vp->v_type) { 3127 case VREG: 3128 case VDIR: 3129 case VLNK: 3130 return (EROFS); 3131 default: 3132 break; 3133 } 3134 } 3135 3136 return (vaccess(va.va_type, va.va_mode, 3137 va.va_uid, va.va_gid, ap->a_mode, ap->a_cred)); 3138 } 3139 3140 /* 3141 * Read wrapper for special devices. 3142 */ 3143 int 3144 nfsspec_read(v) 3145 void *v; 3146 { 3147 struct vop_read_args /* { 3148 struct vnode *a_vp; 3149 struct uio *a_uio; 3150 int a_ioflag; 3151 struct ucred *a_cred; 3152 } */ *ap = v; 3153 struct nfsnode *np = VTONFS(ap->a_vp); 3154 3155 /* 3156 * Set access flag. 3157 */ 3158 np->n_flag |= NACC; 3159 np->n_atim.tv_sec = time.tv_sec; 3160 np->n_atim.tv_nsec = time.tv_usec * 1000; 3161 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_read), ap)); 3162 } 3163 3164 /* 3165 * Write wrapper for special devices. 3166 */ 3167 int 3168 nfsspec_write(v) 3169 void *v; 3170 { 3171 struct vop_write_args /* { 3172 struct vnode *a_vp; 3173 struct uio *a_uio; 3174 int a_ioflag; 3175 struct ucred *a_cred; 3176 } */ *ap = v; 3177 struct nfsnode *np = VTONFS(ap->a_vp); 3178 3179 /* 3180 * Set update flag. 3181 */ 3182 np->n_flag |= NUPD; 3183 np->n_mtim.tv_sec = time.tv_sec; 3184 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3185 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_write), ap)); 3186 } 3187 3188 /* 3189 * Close wrapper for special devices. 3190 * 3191 * Update the times on the nfsnode then do device close. 3192 */ 3193 int 3194 nfsspec_close(v) 3195 void *v; 3196 { 3197 struct vop_close_args /* { 3198 struct vnode *a_vp; 3199 int a_fflag; 3200 struct ucred *a_cred; 3201 struct proc *a_p; 3202 } */ *ap = v; 3203 struct vnode *vp = ap->a_vp; 3204 struct nfsnode *np = VTONFS(vp); 3205 struct vattr vattr; 3206 3207 if (np->n_flag & (NACC | NUPD)) { 3208 np->n_flag |= NCHG; 3209 if (vp->v_usecount == 1 && 3210 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3211 VATTR_NULL(&vattr); 3212 if (np->n_flag & NACC) 3213 vattr.va_atime = np->n_atim; 3214 if (np->n_flag & NUPD) 3215 vattr.va_mtime = np->n_mtim; 3216 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p); 3217 } 3218 } 3219 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_close), ap)); 3220 } 3221 3222 /* 3223 * Read wrapper for fifos. 3224 */ 3225 int 3226 nfsfifo_read(v) 3227 void *v; 3228 { 3229 struct vop_read_args /* { 3230 struct vnode *a_vp; 3231 struct uio *a_uio; 3232 int a_ioflag; 3233 struct ucred *a_cred; 3234 } */ *ap = v; 3235 struct nfsnode *np = VTONFS(ap->a_vp); 3236 3237 /* 3238 * Set access flag. 3239 */ 3240 np->n_flag |= NACC; 3241 np->n_atim.tv_sec = time.tv_sec; 3242 np->n_atim.tv_nsec = time.tv_usec * 1000; 3243 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), ap)); 3244 } 3245 3246 /* 3247 * Write wrapper for fifos. 3248 */ 3249 int 3250 nfsfifo_write(v) 3251 void *v; 3252 { 3253 struct vop_write_args /* { 3254 struct vnode *a_vp; 3255 struct uio *a_uio; 3256 int a_ioflag; 3257 struct ucred *a_cred; 3258 } */ *ap = v; 3259 struct nfsnode *np = VTONFS(ap->a_vp); 3260 3261 /* 3262 * Set update flag. 3263 */ 3264 np->n_flag |= NUPD; 3265 np->n_mtim.tv_sec = time.tv_sec; 3266 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3267 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), ap)); 3268 } 3269 3270 /* 3271 * Close wrapper for fifos. 3272 * 3273 * Update the times on the nfsnode then do fifo close. 3274 */ 3275 int 3276 nfsfifo_close(v) 3277 void *v; 3278 { 3279 struct vop_close_args /* { 3280 struct vnode *a_vp; 3281 int a_fflag; 3282 struct ucred *a_cred; 3283 struct proc *a_p; 3284 } */ *ap = v; 3285 struct vnode *vp = ap->a_vp; 3286 struct nfsnode *np = VTONFS(vp); 3287 struct vattr vattr; 3288 3289 if (np->n_flag & (NACC | NUPD)) { 3290 if (np->n_flag & NACC) { 3291 np->n_atim.tv_sec = time.tv_sec; 3292 np->n_atim.tv_nsec = time.tv_usec * 1000; 3293 } 3294 if (np->n_flag & NUPD) { 3295 np->n_mtim.tv_sec = time.tv_sec; 3296 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3297 } 3298 np->n_flag |= NCHG; 3299 if (vp->v_usecount == 1 && 3300 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3301 VATTR_NULL(&vattr); 3302 if (np->n_flag & NACC) 3303 vattr.va_atime = np->n_atim; 3304 if (np->n_flag & NUPD) 3305 vattr.va_mtime = np->n_mtim; 3306 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p); 3307 } 3308 } 3309 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_close), ap)); 3310 } 3311
Indexes created Tue Oct 14 01:09:49 GMT 2025