1 /* $NetBSD: nfs_vnops.c,v 1.152 2002/10/18 19:08:15 thorpej 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 1.152 2002/10/18 19:08:15 thorpej Exp $"); 47 48 #include "opt_nfs.h" 49 #include "opt_uvmhist.h" 50 51 #include <sys/param.h> 52 #include <sys/proc.h> 53 #include <sys/kernel.h> 54 #include <sys/systm.h> 55 #include <sys/resourcevar.h> 56 #include <sys/proc.h> 57 #include <sys/mount.h> 58 #include <sys/buf.h> 59 #include <sys/malloc.h> 60 #include <sys/mbuf.h> 61 #include <sys/namei.h> 62 #include <sys/vnode.h> 63 #include <sys/dirent.h> 64 #include <sys/fcntl.h> 65 #include <sys/hash.h> 66 #include <sys/lockf.h> 67 #include <sys/stat.h> 68 #include <sys/unistd.h> 69 70 #include <uvm/uvm_extern.h> 71 #include <uvm/uvm.h> 72 73 #include <miscfs/fifofs/fifo.h> 74 #include <miscfs/genfs/genfs.h> 75 #include <miscfs/specfs/specdev.h> 76 77 #include <nfs/rpcv2.h> 78 #include <nfs/nfsproto.h> 79 #include <nfs/nfs.h> 80 #include <nfs/nfsnode.h> 81 #include <nfs/nfsmount.h> 82 #include <nfs/xdr_subs.h> 83 #include <nfs/nfsm_subs.h> 84 #include <nfs/nqnfs.h> 85 #include <nfs/nfs_var.h> 86 87 #include <net/if.h> 88 #include <netinet/in.h> 89 #include <netinet/in_var.h> 90 91 /* Defs */ 92 #define TRUE 1 93 #define FALSE 0 94 95 /* 96 * Global vfs data structures for nfs 97 */ 98 int (**nfsv2_vnodeop_p) __P((void *)); 99 const struct vnodeopv_entry_desc nfsv2_vnodeop_entries[] = { 100 { &vop_default_desc, vn_default_error }, 101 { &vop_lookup_desc, nfs_lookup }, /* lookup */ 102 { &vop_create_desc, nfs_create }, /* create */ 103 { &vop_mknod_desc, nfs_mknod }, /* mknod */ 104 { &vop_open_desc, nfs_open }, /* open */ 105 { &vop_close_desc, nfs_close }, /* close */ 106 { &vop_access_desc, nfs_access }, /* access */ 107 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 108 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 109 { &vop_read_desc, nfs_read }, /* read */ 110 { &vop_write_desc, nfs_write }, /* write */ 111 { &vop_lease_desc, nfs_lease_check }, /* lease */ 112 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 113 { &vop_ioctl_desc, nfs_ioctl }, /* ioctl */ 114 { &vop_poll_desc, nfs_poll }, /* poll */ 115 { &vop_revoke_desc, nfs_revoke }, /* revoke */ 116 { &vop_mmap_desc, nfs_mmap }, /* mmap */ 117 { &vop_fsync_desc, nfs_fsync }, /* fsync */ 118 { &vop_seek_desc, nfs_seek }, /* seek */ 119 { &vop_remove_desc, nfs_remove }, /* remove */ 120 { &vop_link_desc, nfs_link }, /* link */ 121 { &vop_rename_desc, nfs_rename }, /* rename */ 122 { &vop_mkdir_desc, nfs_mkdir }, /* mkdir */ 123 { &vop_rmdir_desc, nfs_rmdir }, /* rmdir */ 124 { &vop_symlink_desc, nfs_symlink }, /* symlink */ 125 { &vop_readdir_desc, nfs_readdir }, /* readdir */ 126 { &vop_readlink_desc, nfs_readlink }, /* readlink */ 127 { &vop_abortop_desc, nfs_abortop }, /* abortop */ 128 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 129 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 130 { &vop_lock_desc, nfs_lock }, /* lock */ 131 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 132 { &vop_bmap_desc, nfs_bmap }, /* bmap */ 133 { &vop_strategy_desc, nfs_strategy }, /* strategy */ 134 { &vop_print_desc, nfs_print }, /* print */ 135 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 136 { &vop_pathconf_desc, nfs_pathconf }, /* pathconf */ 137 { &vop_advlock_desc, nfs_advlock }, /* advlock */ 138 { &vop_blkatoff_desc, nfs_blkatoff }, /* blkatoff */ 139 { &vop_valloc_desc, nfs_valloc }, /* valloc */ 140 { &vop_reallocblks_desc, nfs_reallocblks }, /* reallocblks */ 141 { &vop_vfree_desc, nfs_vfree }, /* vfree */ 142 { &vop_truncate_desc, nfs_truncate }, /* truncate */ 143 { &vop_update_desc, nfs_update }, /* update */ 144 { &vop_bwrite_desc, nfs_bwrite }, /* bwrite */ 145 { &vop_getpages_desc, nfs_getpages }, /* getpages */ 146 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 147 { NULL, NULL } 148 }; 149 const struct vnodeopv_desc nfsv2_vnodeop_opv_desc = 150 { &nfsv2_vnodeop_p, nfsv2_vnodeop_entries }; 151 152 /* 153 * Special device vnode ops 154 */ 155 int (**spec_nfsv2nodeop_p) __P((void *)); 156 const struct vnodeopv_entry_desc spec_nfsv2nodeop_entries[] = { 157 { &vop_default_desc, vn_default_error }, 158 { &vop_lookup_desc, spec_lookup }, /* lookup */ 159 { &vop_create_desc, spec_create }, /* create */ 160 { &vop_mknod_desc, spec_mknod }, /* mknod */ 161 { &vop_open_desc, spec_open }, /* open */ 162 { &vop_close_desc, nfsspec_close }, /* close */ 163 { &vop_access_desc, nfsspec_access }, /* access */ 164 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 165 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 166 { &vop_read_desc, nfsspec_read }, /* read */ 167 { &vop_write_desc, nfsspec_write }, /* write */ 168 { &vop_lease_desc, spec_lease_check }, /* lease */ 169 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 170 { &vop_ioctl_desc, spec_ioctl }, /* ioctl */ 171 { &vop_poll_desc, spec_poll }, /* poll */ 172 { &vop_revoke_desc, spec_revoke }, /* revoke */ 173 { &vop_mmap_desc, spec_mmap }, /* mmap */ 174 { &vop_fsync_desc, spec_fsync }, /* fsync */ 175 { &vop_seek_desc, spec_seek }, /* seek */ 176 { &vop_remove_desc, spec_remove }, /* remove */ 177 { &vop_link_desc, spec_link }, /* link */ 178 { &vop_rename_desc, spec_rename }, /* rename */ 179 { &vop_mkdir_desc, spec_mkdir }, /* mkdir */ 180 { &vop_rmdir_desc, spec_rmdir }, /* rmdir */ 181 { &vop_symlink_desc, spec_symlink }, /* symlink */ 182 { &vop_readdir_desc, spec_readdir }, /* readdir */ 183 { &vop_readlink_desc, spec_readlink }, /* readlink */ 184 { &vop_abortop_desc, spec_abortop }, /* abortop */ 185 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 186 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 187 { &vop_lock_desc, nfs_lock }, /* lock */ 188 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 189 { &vop_bmap_desc, spec_bmap }, /* bmap */ 190 { &vop_strategy_desc, spec_strategy }, /* strategy */ 191 { &vop_print_desc, nfs_print }, /* print */ 192 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 193 { &vop_pathconf_desc, spec_pathconf }, /* pathconf */ 194 { &vop_advlock_desc, spec_advlock }, /* advlock */ 195 { &vop_blkatoff_desc, spec_blkatoff }, /* blkatoff */ 196 { &vop_valloc_desc, spec_valloc }, /* valloc */ 197 { &vop_reallocblks_desc, spec_reallocblks }, /* reallocblks */ 198 { &vop_vfree_desc, spec_vfree }, /* vfree */ 199 { &vop_truncate_desc, spec_truncate }, /* truncate */ 200 { &vop_update_desc, nfs_update }, /* update */ 201 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 202 { &vop_getpages_desc, spec_getpages }, /* getpages */ 203 { &vop_putpages_desc, spec_putpages }, /* putpages */ 204 { NULL, NULL } 205 }; 206 const struct vnodeopv_desc spec_nfsv2nodeop_opv_desc = 207 { &spec_nfsv2nodeop_p, spec_nfsv2nodeop_entries }; 208 209 int (**fifo_nfsv2nodeop_p) __P((void *)); 210 const struct vnodeopv_entry_desc fifo_nfsv2nodeop_entries[] = { 211 { &vop_default_desc, vn_default_error }, 212 { &vop_lookup_desc, fifo_lookup }, /* lookup */ 213 { &vop_create_desc, fifo_create }, /* create */ 214 { &vop_mknod_desc, fifo_mknod }, /* mknod */ 215 { &vop_open_desc, fifo_open }, /* open */ 216 { &vop_close_desc, nfsfifo_close }, /* close */ 217 { &vop_access_desc, nfsspec_access }, /* access */ 218 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 219 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 220 { &vop_read_desc, nfsfifo_read }, /* read */ 221 { &vop_write_desc, nfsfifo_write }, /* write */ 222 { &vop_lease_desc, fifo_lease_check }, /* lease */ 223 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 224 { &vop_ioctl_desc, fifo_ioctl }, /* ioctl */ 225 { &vop_poll_desc, fifo_poll }, /* poll */ 226 { &vop_revoke_desc, fifo_revoke }, /* revoke */ 227 { &vop_mmap_desc, fifo_mmap }, /* mmap */ 228 { &vop_fsync_desc, nfs_fsync }, /* fsync */ 229 { &vop_seek_desc, fifo_seek }, /* seek */ 230 { &vop_remove_desc, fifo_remove }, /* remove */ 231 { &vop_link_desc, fifo_link }, /* link */ 232 { &vop_rename_desc, fifo_rename }, /* rename */ 233 { &vop_mkdir_desc, fifo_mkdir }, /* mkdir */ 234 { &vop_rmdir_desc, fifo_rmdir }, /* rmdir */ 235 { &vop_symlink_desc, fifo_symlink }, /* symlink */ 236 { &vop_readdir_desc, fifo_readdir }, /* readdir */ 237 { &vop_readlink_desc, fifo_readlink }, /* readlink */ 238 { &vop_abortop_desc, fifo_abortop }, /* abortop */ 239 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 240 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 241 { &vop_lock_desc, nfs_lock }, /* lock */ 242 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 243 { &vop_bmap_desc, fifo_bmap }, /* bmap */ 244 { &vop_strategy_desc, genfs_badop }, /* strategy */ 245 { &vop_print_desc, nfs_print }, /* print */ 246 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 247 { &vop_pathconf_desc, fifo_pathconf }, /* pathconf */ 248 { &vop_advlock_desc, fifo_advlock }, /* advlock */ 249 { &vop_blkatoff_desc, fifo_blkatoff }, /* blkatoff */ 250 { &vop_valloc_desc, fifo_valloc }, /* valloc */ 251 { &vop_reallocblks_desc, fifo_reallocblks }, /* reallocblks */ 252 { &vop_vfree_desc, fifo_vfree }, /* vfree */ 253 { &vop_truncate_desc, fifo_truncate }, /* truncate */ 254 { &vop_update_desc, nfs_update }, /* update */ 255 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 256 { &vop_putpages_desc, fifo_putpages }, /* putpages */ 257 { NULL, NULL } 258 }; 259 const struct vnodeopv_desc fifo_nfsv2nodeop_opv_desc = 260 { &fifo_nfsv2nodeop_p, fifo_nfsv2nodeop_entries }; 261 262 /* 263 * Global variables 264 */ 265 extern u_int32_t nfs_true, nfs_false; 266 extern u_int32_t nfs_xdrneg1; 267 extern nfstype nfsv3_type[9]; 268 269 struct proc *nfs_iodwant[NFS_MAXASYNCDAEMON]; 270 struct nfsmount *nfs_iodmount[NFS_MAXASYNCDAEMON]; 271 int nfs_numasync = 0; 272 #define DIRHDSIZ (sizeof (struct dirent) - (MAXNAMLEN + 1)) 273 274 /* 275 * nfs null call from vfs. 276 */ 277 int 278 nfs_null(vp, cred, procp) 279 struct vnode *vp; 280 struct ucred *cred; 281 struct proc *procp; 282 { 283 caddr_t bpos, dpos; 284 int error = 0; 285 struct mbuf *mreq, *mrep, *md, *mb; 286 287 nfsm_reqhead(vp, NFSPROC_NULL, 0); 288 nfsm_request(vp, NFSPROC_NULL, procp, cred); 289 nfsm_reqdone; 290 return (error); 291 } 292 293 /* 294 * nfs access vnode op. 295 * For nfs version 2, just return ok. File accesses may fail later. 296 * For nfs version 3, use the access rpc to check accessibility. If file modes 297 * are changed on the server, accesses might still fail later. 298 */ 299 int 300 nfs_access(v) 301 void *v; 302 { 303 struct vop_access_args /* { 304 struct vnode *a_vp; 305 int a_mode; 306 struct ucred *a_cred; 307 struct proc *a_p; 308 } */ *ap = v; 309 struct vnode *vp = ap->a_vp; 310 u_int32_t *tl; 311 caddr_t cp; 312 int32_t t1, t2; 313 caddr_t bpos, dpos, cp2; 314 int error = 0, attrflag, cachevalid; 315 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 316 u_int32_t mode, rmode; 317 const int v3 = NFS_ISV3(vp); 318 struct nfsnode *np = VTONFS(vp); 319 320 cachevalid = (np->n_accstamp != -1 && 321 (time.tv_sec - np->n_accstamp) < NFS_ATTRTIMEO(np) && 322 np->n_accuid == ap->a_cred->cr_uid); 323 324 /* 325 * Check access cache first. If this request has been made for this 326 * uid shortly before, use the cached result. 327 */ 328 if (cachevalid) { 329 if (!np->n_accerror) { 330 if ((np->n_accmode & ap->a_mode) == ap->a_mode) 331 return np->n_accerror; 332 } else if ((np->n_accmode & ap->a_mode) == np->n_accmode) 333 return np->n_accerror; 334 } 335 336 /* 337 * For nfs v3, do an access rpc, otherwise you are stuck emulating 338 * ufs_access() locally using the vattr. This may not be correct, 339 * since the server may apply other access criteria such as 340 * client uid-->server uid mapping that we do not know about, but 341 * this is better than just returning anything that is lying about 342 * in the cache. 343 */ 344 if (v3) { 345 nfsstats.rpccnt[NFSPROC_ACCESS]++; 346 nfsm_reqhead(vp, NFSPROC_ACCESS, NFSX_FH(v3) + NFSX_UNSIGNED); 347 nfsm_fhtom(vp, v3); 348 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 349 if (ap->a_mode & VREAD) 350 mode = NFSV3ACCESS_READ; 351 else 352 mode = 0; 353 if (vp->v_type != VDIR) { 354 if (ap->a_mode & VWRITE) 355 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND); 356 if (ap->a_mode & VEXEC) 357 mode |= NFSV3ACCESS_EXECUTE; 358 } else { 359 if (ap->a_mode & VWRITE) 360 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | 361 NFSV3ACCESS_DELETE); 362 if (ap->a_mode & VEXEC) 363 mode |= NFSV3ACCESS_LOOKUP; 364 } 365 *tl = txdr_unsigned(mode); 366 nfsm_request(vp, NFSPROC_ACCESS, ap->a_p, ap->a_cred); 367 nfsm_postop_attr(vp, attrflag); 368 if (!error) { 369 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 370 rmode = fxdr_unsigned(u_int32_t, *tl); 371 /* 372 * The NFS V3 spec does not clarify whether or not 373 * the returned access bits can be a superset of 374 * the ones requested, so... 375 */ 376 if ((rmode & mode) != mode) 377 error = EACCES; 378 } 379 nfsm_reqdone; 380 } else 381 return (nfsspec_access(ap)); 382 /* 383 * Disallow write attempts on filesystems mounted read-only; 384 * unless the file is a socket, fifo, or a block or character 385 * device resident on the filesystem. 386 */ 387 if (!error && (ap->a_mode & VWRITE) && 388 (vp->v_mount->mnt_flag & MNT_RDONLY)) { 389 switch (vp->v_type) { 390 case VREG: 391 case VDIR: 392 case VLNK: 393 error = EROFS; 394 default: 395 break; 396 } 397 } 398 399 if (!error || error == EACCES) { 400 /* 401 * If we got the same result as for a previous, 402 * different request, OR it in. Don't update 403 * the timestamp in that case. 404 */ 405 if (cachevalid && np->n_accstamp != -1 && 406 error == np->n_accerror) { 407 if (!error) 408 np->n_accmode |= ap->a_mode; 409 else if ((np->n_accmode & ap->a_mode) == ap->a_mode) 410 np->n_accmode = ap->a_mode; 411 } else { 412 np->n_accstamp = time.tv_sec; 413 np->n_accuid = ap->a_cred->cr_uid; 414 np->n_accmode = ap->a_mode; 415 np->n_accerror = error; 416 } 417 } 418 419 return (error); 420 } 421 422 /* 423 * nfs open vnode op 424 * Check to see if the type is ok 425 * and that deletion is not in progress. 426 * For paged in text files, you will need to flush the page cache 427 * if consistency is lost. 428 */ 429 /* ARGSUSED */ 430 int 431 nfs_open(v) 432 void *v; 433 { 434 struct vop_open_args /* { 435 struct vnode *a_vp; 436 int a_mode; 437 struct ucred *a_cred; 438 struct proc *a_p; 439 } */ *ap = v; 440 struct vnode *vp = ap->a_vp; 441 struct nfsnode *np = VTONFS(vp); 442 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 443 struct vattr vattr; 444 int error; 445 446 if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK) { 447 return (EACCES); 448 } 449 450 /* 451 * Initialize read and write creds here, for swapfiles 452 * and other paths that don't set the creds themselves. 453 */ 454 455 if (ap->a_mode & FREAD) { 456 if (np->n_rcred) { 457 crfree(np->n_rcred); 458 } 459 np->n_rcred = ap->a_cred; 460 crhold(np->n_rcred); 461 } 462 if (ap->a_mode & FWRITE) { 463 if (np->n_wcred) { 464 crfree(np->n_wcred); 465 } 466 np->n_wcred = ap->a_cred; 467 crhold(np->n_wcred); 468 } 469 470 #ifndef NFS_V2_ONLY 471 /* 472 * Get a valid lease. If cached data is stale, flush it. 473 */ 474 if (nmp->nm_flag & NFSMNT_NQNFS) { 475 if (NQNFS_CKINVALID(vp, np, ND_READ)) { 476 do { 477 error = nqnfs_getlease(vp, ND_READ, ap->a_cred, 478 ap->a_p); 479 } while (error == NQNFS_EXPIRED); 480 if (error) 481 return (error); 482 if (np->n_lrev != np->n_brev || 483 (np->n_flag & NQNFSNONCACHE)) { 484 if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 485 ap->a_p, 1)) == EINTR) 486 return (error); 487 np->n_brev = np->n_lrev; 488 } 489 } 490 } else 491 #endif 492 { 493 if (np->n_flag & NMODIFIED) { 494 if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 495 ap->a_p, 1)) == EINTR) 496 return (error); 497 np->n_attrstamp = 0; 498 if (vp->v_type == VDIR) { 499 nfs_invaldircache(vp, 0); 500 np->n_direofoffset = 0; 501 } 502 error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_p); 503 if (error) 504 return (error); 505 np->n_mtime = vattr.va_mtime.tv_sec; 506 } else { 507 error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_p); 508 if (error) 509 return (error); 510 if (np->n_mtime != vattr.va_mtime.tv_sec) { 511 if (vp->v_type == VDIR) { 512 nfs_invaldircache(vp, 0); 513 np->n_direofoffset = 0; 514 } 515 if ((error = nfs_vinvalbuf(vp, V_SAVE, 516 ap->a_cred, ap->a_p, 1)) == EINTR) 517 return (error); 518 np->n_mtime = vattr.va_mtime.tv_sec; 519 } 520 } 521 } 522 if ((nmp->nm_flag & NFSMNT_NQNFS) == 0) 523 np->n_attrstamp = 0; /* For Open/Close consistency */ 524 return (0); 525 } 526 527 /* 528 * nfs close vnode op 529 * What an NFS client should do upon close after writing is a debatable issue. 530 * Most NFS clients push delayed writes to the server upon close, basically for 531 * two reasons: 532 * 1 - So that any write errors may be reported back to the client process 533 * doing the close system call. By far the two most likely errors are 534 * NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure. 535 * 2 - To put a worst case upper bound on cache inconsistency between 536 * multiple clients for the file. 537 * There is also a consistency problem for Version 2 of the protocol w.r.t. 538 * not being able to tell if other clients are writing a file concurrently, 539 * since there is no way of knowing if the changed modify time in the reply 540 * is only due to the write for this client. 541 * (NFS Version 3 provides weak cache consistency data in the reply that 542 * should be sufficient to detect and handle this case.) 543 * 544 * The current code does the following: 545 * for NFS Version 2 - play it safe and flush/invalidate all dirty buffers 546 * for NFS Version 3 - flush dirty buffers to the server but don't invalidate 547 * or commit them (this satisfies 1 and 2 except for the 548 * case where the server crashes after this close but 549 * before the commit RPC, which is felt to be "good 550 * enough". Changing the last argument to nfs_flush() to 551 * a 1 would force a commit operation, if it is felt a 552 * commit is necessary now. 553 * for NQNFS - do nothing now, since 2 is dealt with via leases and 554 * 1 should be dealt with via an fsync() system call for 555 * cases where write errors are important. 556 */ 557 /* ARGSUSED */ 558 int 559 nfs_close(v) 560 void *v; 561 { 562 struct vop_close_args /* { 563 struct vnodeop_desc *a_desc; 564 struct vnode *a_vp; 565 int a_fflag; 566 struct ucred *a_cred; 567 struct proc *a_p; 568 } */ *ap = v; 569 struct vnode *vp = ap->a_vp; 570 struct nfsnode *np = VTONFS(vp); 571 int error = 0; 572 UVMHIST_FUNC("nfs_close"); UVMHIST_CALLED(ubchist); 573 574 if (vp->v_type == VREG) { 575 if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS) == 0 && 576 (np->n_flag & NMODIFIED)) { 577 if (NFS_ISV3(vp)) { 578 error = nfs_flush(vp, ap->a_cred, MNT_WAIT, ap->a_p, 0); 579 np->n_flag &= ~NMODIFIED; 580 } else 581 error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, ap->a_p, 1); 582 np->n_attrstamp = 0; 583 } 584 if (np->n_flag & NWRITEERR) { 585 np->n_flag &= ~NWRITEERR; 586 error = np->n_error; 587 } 588 } 589 UVMHIST_LOG(ubchist, "returning %d", error,0,0,0); 590 return (error); 591 } 592 593 /* 594 * nfs getattr call from vfs. 595 */ 596 int 597 nfs_getattr(v) 598 void *v; 599 { 600 struct vop_getattr_args /* { 601 struct vnode *a_vp; 602 struct vattr *a_vap; 603 struct ucred *a_cred; 604 struct proc *a_p; 605 } */ *ap = v; 606 struct vnode *vp = ap->a_vp; 607 struct nfsnode *np = VTONFS(vp); 608 caddr_t cp; 609 u_int32_t *tl; 610 int32_t t1, t2; 611 caddr_t bpos, dpos; 612 int error = 0; 613 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 614 const int v3 = NFS_ISV3(vp); 615 616 /* 617 * Update local times for special files. 618 */ 619 if (np->n_flag & (NACC | NUPD)) 620 np->n_flag |= NCHG; 621 /* 622 * First look in the cache. 623 */ 624 if (nfs_getattrcache(vp, ap->a_vap) == 0) 625 return (0); 626 nfsstats.rpccnt[NFSPROC_GETATTR]++; 627 nfsm_reqhead(vp, NFSPROC_GETATTR, NFSX_FH(v3)); 628 nfsm_fhtom(vp, v3); 629 nfsm_request(vp, NFSPROC_GETATTR, ap->a_p, ap->a_cred); 630 if (!error) { 631 nfsm_loadattr(vp, ap->a_vap); 632 if (vp->v_type == VDIR && 633 ap->a_vap->va_blocksize < NFS_DIRFRAGSIZ) 634 ap->a_vap->va_blocksize = NFS_DIRFRAGSIZ; 635 } 636 nfsm_reqdone; 637 return (error); 638 } 639 640 /* 641 * nfs setattr call. 642 */ 643 int 644 nfs_setattr(v) 645 void *v; 646 { 647 struct vop_setattr_args /* { 648 struct vnodeop_desc *a_desc; 649 struct vnode *a_vp; 650 struct vattr *a_vap; 651 struct ucred *a_cred; 652 struct proc *a_p; 653 } */ *ap = v; 654 struct vnode *vp = ap->a_vp; 655 struct nfsnode *np = VTONFS(vp); 656 struct vattr *vap = ap->a_vap; 657 int error = 0; 658 u_quad_t tsize = 0; 659 660 /* 661 * Setting of flags is not supported. 662 */ 663 if (vap->va_flags != VNOVAL) 664 return (EOPNOTSUPP); 665 666 /* 667 * Disallow write attempts if the filesystem is mounted read-only. 668 */ 669 if ((vap->va_uid != (uid_t)VNOVAL || 670 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL || 671 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) && 672 (vp->v_mount->mnt_flag & MNT_RDONLY)) 673 return (EROFS); 674 if (vap->va_size != VNOVAL) { 675 switch (vp->v_type) { 676 case VDIR: 677 return (EISDIR); 678 case VCHR: 679 case VBLK: 680 case VSOCK: 681 case VFIFO: 682 if (vap->va_mtime.tv_sec == VNOVAL && 683 vap->va_atime.tv_sec == VNOVAL && 684 vap->va_mode == (mode_t)VNOVAL && 685 vap->va_uid == (uid_t)VNOVAL && 686 vap->va_gid == (gid_t)VNOVAL) 687 return (0); 688 vap->va_size = VNOVAL; 689 break; 690 default: 691 /* 692 * Disallow write attempts if the filesystem is 693 * mounted read-only. 694 */ 695 if (vp->v_mount->mnt_flag & MNT_RDONLY) 696 return (EROFS); 697 uvm_vnp_setsize(vp, vap->va_size); 698 tsize = np->n_size; 699 np->n_size = vap->va_size; 700 if (vap->va_size == 0) 701 error = nfs_vinvalbuf(vp, 0, 702 ap->a_cred, ap->a_p, 1); 703 else 704 error = nfs_vinvalbuf(vp, V_SAVE, 705 ap->a_cred, ap->a_p, 1); 706 if (error) { 707 uvm_vnp_setsize(vp, tsize); 708 return (error); 709 } 710 np->n_vattr->va_size = vap->va_size; 711 } 712 } else if ((vap->va_mtime.tv_sec != VNOVAL || 713 vap->va_atime.tv_sec != VNOVAL) && 714 vp->v_type == VREG && 715 (error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 716 ap->a_p, 1)) == EINTR) 717 return (error); 718 error = nfs_setattrrpc(vp, vap, ap->a_cred, ap->a_p); 719 if (error && vap->va_size != VNOVAL) { 720 np->n_size = np->n_vattr->va_size = tsize; 721 uvm_vnp_setsize(vp, np->n_size); 722 } 723 return (error); 724 } 725 726 /* 727 * Do an nfs setattr rpc. 728 */ 729 int 730 nfs_setattrrpc(vp, vap, cred, procp) 731 struct vnode *vp; 732 struct vattr *vap; 733 struct ucred *cred; 734 struct proc *procp; 735 { 736 struct nfsv2_sattr *sp; 737 caddr_t cp; 738 int32_t t1, t2; 739 caddr_t bpos, dpos, cp2; 740 u_int32_t *tl; 741 int error = 0, wccflag = NFSV3_WCCRATTR; 742 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 743 const int v3 = NFS_ISV3(vp); 744 745 nfsstats.rpccnt[NFSPROC_SETATTR]++; 746 nfsm_reqhead(vp, NFSPROC_SETATTR, NFSX_FH(v3) + NFSX_SATTR(v3)); 747 nfsm_fhtom(vp, v3); 748 if (v3) { 749 nfsm_v3attrbuild(vap, TRUE); 750 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 751 *tl = nfs_false; 752 } else { 753 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 754 if (vap->va_mode == (mode_t)VNOVAL) 755 sp->sa_mode = nfs_xdrneg1; 756 else 757 sp->sa_mode = vtonfsv2_mode(vp->v_type, vap->va_mode); 758 if (vap->va_uid == (uid_t)VNOVAL) 759 sp->sa_uid = nfs_xdrneg1; 760 else 761 sp->sa_uid = txdr_unsigned(vap->va_uid); 762 if (vap->va_gid == (gid_t)VNOVAL) 763 sp->sa_gid = nfs_xdrneg1; 764 else 765 sp->sa_gid = txdr_unsigned(vap->va_gid); 766 sp->sa_size = txdr_unsigned(vap->va_size); 767 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 768 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 769 } 770 nfsm_request(vp, NFSPROC_SETATTR, procp, cred); 771 if (v3) { 772 nfsm_wcc_data(vp, wccflag); 773 } else 774 nfsm_loadattr(vp, (struct vattr *)0); 775 nfsm_reqdone; 776 return (error); 777 } 778 779 /* 780 * nfs lookup call, one step at a time... 781 * First look in cache 782 * If not found, unlock the directory nfsnode and do the rpc 783 * 784 * This code is full of lock/unlock statements and checks, because 785 * we continue after cache_lookup has finished (we need to check 786 * with the attr cache and do an rpc if it has timed out). This means 787 * that the locking effects of cache_lookup have to be taken into 788 * account. 789 */ 790 int 791 nfs_lookup(v) 792 void *v; 793 { 794 struct vop_lookup_args /* { 795 struct vnodeop_desc *a_desc; 796 struct vnode *a_dvp; 797 struct vnode **a_vpp; 798 struct componentname *a_cnp; 799 } */ *ap = v; 800 struct componentname *cnp = ap->a_cnp; 801 struct vnode *dvp = ap->a_dvp; 802 struct vnode **vpp = ap->a_vpp; 803 int flags; 804 struct vnode *newvp; 805 u_int32_t *tl; 806 caddr_t cp; 807 int32_t t1, t2; 808 struct nfsmount *nmp; 809 caddr_t bpos, dpos, cp2; 810 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 811 long len; 812 nfsfh_t *fhp; 813 struct nfsnode *np; 814 int lockparent, wantparent, error = 0, attrflag, fhsize; 815 const int v3 = NFS_ISV3(dvp); 816 817 cnp->cn_flags &= ~PDIRUNLOCK; 818 flags = cnp->cn_flags; 819 820 *vpp = NULLVP; 821 newvp = NULLVP; 822 if ((flags & ISLASTCN) && (dvp->v_mount->mnt_flag & MNT_RDONLY) && 823 (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) 824 return (EROFS); 825 if (dvp->v_type != VDIR) 826 return (ENOTDIR); 827 828 lockparent = flags & LOCKPARENT; 829 wantparent = flags & (LOCKPARENT|WANTPARENT); 830 nmp = VFSTONFS(dvp->v_mount); 831 np = VTONFS(dvp); 832 833 /* 834 * Before tediously performing a linear scan of the directory, 835 * check the name cache to see if the directory/name pair 836 * we are looking for is known already. 837 * If the directory/name pair is found in the name cache, 838 * we have to ensure the directory has not changed from 839 * the time the cache entry has been created. If it has, 840 * the cache entry has to be ignored 841 */ 842 if ((error = cache_lookup(dvp, vpp, cnp)) >= 0) { 843 struct vattr vattr; 844 int err2; 845 846 if (error && error != ENOENT) { 847 *vpp = NULLVP; 848 return error; 849 } 850 851 if (cnp->cn_flags & PDIRUNLOCK) { 852 err2 = vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 853 if (err2 != 0) { 854 *vpp = NULLVP; 855 return err2; 856 } 857 cnp->cn_flags &= ~PDIRUNLOCK; 858 } 859 860 err2 = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, cnp->cn_proc); 861 if (err2 != 0) { 862 if (error == 0) { 863 if (*vpp != dvp) 864 vput(*vpp); 865 else 866 vrele(*vpp); 867 } 868 *vpp = NULLVP; 869 return err2; 870 } 871 872 if (error == ENOENT) { 873 if (!VOP_GETATTR(dvp, &vattr, cnp->cn_cred, 874 cnp->cn_proc) && vattr.va_mtime.tv_sec == 875 VTONFS(dvp)->n_nctime) 876 return ENOENT; 877 cache_purge(dvp); 878 np->n_nctime = 0; 879 goto dorpc; 880 } 881 882 newvp = *vpp; 883 if (!VOP_GETATTR(newvp, &vattr, cnp->cn_cred, cnp->cn_proc) 884 && vattr.va_ctime.tv_sec == VTONFS(newvp)->n_ctime) 885 { 886 nfsstats.lookupcache_hits++; 887 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 888 cnp->cn_flags |= SAVENAME; 889 if ((!lockparent || !(flags & ISLASTCN)) && 890 newvp != dvp) 891 VOP_UNLOCK(dvp, 0); 892 return (0); 893 } 894 cache_purge(newvp); 895 if (newvp != dvp) 896 vput(newvp); 897 else 898 vrele(newvp); 899 *vpp = NULLVP; 900 } 901 dorpc: 902 error = 0; 903 newvp = NULLVP; 904 nfsstats.lookupcache_misses++; 905 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 906 len = cnp->cn_namelen; 907 nfsm_reqhead(dvp, NFSPROC_LOOKUP, 908 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 909 nfsm_fhtom(dvp, v3); 910 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 911 nfsm_request(dvp, NFSPROC_LOOKUP, cnp->cn_proc, cnp->cn_cred); 912 if (error) { 913 nfsm_postop_attr(dvp, attrflag); 914 m_freem(mrep); 915 goto nfsmout; 916 } 917 nfsm_getfh(fhp, fhsize, v3); 918 919 /* 920 * Handle RENAME case... 921 */ 922 if (cnp->cn_nameiop == RENAME && wantparent && (flags & ISLASTCN)) { 923 if (NFS_CMPFH(np, fhp, fhsize)) { 924 m_freem(mrep); 925 return (EISDIR); 926 } 927 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 928 if (error) { 929 m_freem(mrep); 930 return error; 931 } 932 newvp = NFSTOV(np); 933 if (v3) { 934 nfsm_postop_attr(newvp, attrflag); 935 nfsm_postop_attr(dvp, attrflag); 936 } else 937 nfsm_loadattr(newvp, (struct vattr *)0); 938 *vpp = newvp; 939 m_freem(mrep); 940 cnp->cn_flags |= SAVENAME; 941 if (!lockparent) { 942 VOP_UNLOCK(dvp, 0); 943 cnp->cn_flags |= PDIRUNLOCK; 944 } 945 return (0); 946 } 947 948 /* 949 * The postop attr handling is duplicated for each if case, 950 * because it should be done while dvp is locked (unlocking 951 * dvp is different for each case). 952 */ 953 954 if (NFS_CMPFH(np, fhp, fhsize)) { 955 /* 956 * "." lookup 957 */ 958 VREF(dvp); 959 newvp = dvp; 960 if (v3) { 961 nfsm_postop_attr(newvp, attrflag); 962 nfsm_postop_attr(dvp, attrflag); 963 } else 964 nfsm_loadattr(newvp, (struct vattr *)0); 965 } else if (flags & ISDOTDOT) { 966 /* 967 * ".." lookup 968 */ 969 VOP_UNLOCK(dvp, 0); 970 cnp->cn_flags |= PDIRUNLOCK; 971 972 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 973 if (error) { 974 if (vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY) == 0) 975 cnp->cn_flags &= ~PDIRUNLOCK; 976 m_freem(mrep); 977 return error; 978 } 979 newvp = NFSTOV(np); 980 981 if (v3) { 982 nfsm_postop_attr(newvp, attrflag); 983 nfsm_postop_attr(dvp, attrflag); 984 } else 985 nfsm_loadattr(newvp, (struct vattr *)0); 986 987 if (lockparent && (flags & ISLASTCN)) { 988 if ((error = vn_lock(dvp, LK_EXCLUSIVE))) { 989 m_freem(mrep); 990 vput(newvp); 991 return error; 992 } 993 cnp->cn_flags &= ~PDIRUNLOCK; 994 } 995 } else { 996 /* 997 * Other lookups. 998 */ 999 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 1000 if (error) { 1001 m_freem(mrep); 1002 return error; 1003 } 1004 newvp = NFSTOV(np); 1005 if (v3) { 1006 nfsm_postop_attr(newvp, attrflag); 1007 nfsm_postop_attr(dvp, attrflag); 1008 } else 1009 nfsm_loadattr(newvp, (struct vattr *)0); 1010 if (!lockparent || !(flags & ISLASTCN)) { 1011 VOP_UNLOCK(dvp, 0); 1012 cnp->cn_flags |= PDIRUNLOCK; 1013 } 1014 } 1015 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 1016 cnp->cn_flags |= SAVENAME; 1017 if ((cnp->cn_flags & MAKEENTRY) && 1018 (cnp->cn_nameiop != DELETE || !(flags & ISLASTCN))) { 1019 np->n_ctime = np->n_vattr->va_ctime.tv_sec; 1020 cache_enter(dvp, newvp, cnp); 1021 } 1022 *vpp = newvp; 1023 nfsm_reqdone; 1024 if (error) { 1025 /* 1026 * We get here only because of errors returned by 1027 * the RPC. Otherwise we'll have returned above 1028 * (the nfsm_* macros will jump to nfsm_reqdone 1029 * on error). 1030 */ 1031 if (error == ENOENT && (cnp->cn_flags & MAKEENTRY) && 1032 cnp->cn_nameiop != CREATE) { 1033 if (VTONFS(dvp)->n_nctime == 0) 1034 VTONFS(dvp)->n_nctime = 1035 VTONFS(dvp)->n_vattr->va_mtime.tv_sec; 1036 cache_enter(dvp, NULL, cnp); 1037 } 1038 if (newvp != NULLVP) { 1039 vrele(newvp); 1040 if (newvp != dvp) 1041 VOP_UNLOCK(newvp, 0); 1042 } 1043 if ((cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME) && 1044 (flags & ISLASTCN) && error == ENOENT) { 1045 if (dvp->v_mount->mnt_flag & MNT_RDONLY) 1046 error = EROFS; 1047 else 1048 error = EJUSTRETURN; 1049 } 1050 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 1051 cnp->cn_flags |= SAVENAME; 1052 *vpp = NULL; 1053 } 1054 1055 return error; 1056 } 1057 1058 /* 1059 * nfs read call. 1060 * Just call nfs_bioread() to do the work. 1061 */ 1062 int 1063 nfs_read(v) 1064 void *v; 1065 { 1066 struct vop_read_args /* { 1067 struct vnode *a_vp; 1068 struct uio *a_uio; 1069 int a_ioflag; 1070 struct ucred *a_cred; 1071 } */ *ap = v; 1072 struct vnode *vp = ap->a_vp; 1073 1074 if (vp->v_type != VREG) 1075 return (EPERM); 1076 return (nfs_bioread(vp, ap->a_uio, ap->a_ioflag, ap->a_cred, 0)); 1077 } 1078 1079 /* 1080 * nfs readlink call 1081 */ 1082 int 1083 nfs_readlink(v) 1084 void *v; 1085 { 1086 struct vop_readlink_args /* { 1087 struct vnode *a_vp; 1088 struct uio *a_uio; 1089 struct ucred *a_cred; 1090 } */ *ap = v; 1091 struct vnode *vp = ap->a_vp; 1092 1093 if (vp->v_type != VLNK) 1094 return (EPERM); 1095 return (nfs_bioread(vp, ap->a_uio, 0, ap->a_cred, 0)); 1096 } 1097 1098 /* 1099 * Do a readlink rpc. 1100 * Called by nfs_doio() from below the buffer cache. 1101 */ 1102 int 1103 nfs_readlinkrpc(vp, uiop, cred) 1104 struct vnode *vp; 1105 struct uio *uiop; 1106 struct ucred *cred; 1107 { 1108 u_int32_t *tl; 1109 caddr_t cp; 1110 int32_t t1, t2; 1111 caddr_t bpos, dpos, cp2; 1112 int error = 0, len, attrflag; 1113 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1114 const int v3 = NFS_ISV3(vp); 1115 1116 nfsstats.rpccnt[NFSPROC_READLINK]++; 1117 nfsm_reqhead(vp, NFSPROC_READLINK, NFSX_FH(v3)); 1118 nfsm_fhtom(vp, v3); 1119 nfsm_request(vp, NFSPROC_READLINK, uiop->uio_procp, cred); 1120 if (v3) 1121 nfsm_postop_attr(vp, attrflag); 1122 if (!error) { 1123 nfsm_strsiz(len, NFS_MAXPATHLEN); 1124 nfsm_mtouio(uiop, len); 1125 } 1126 nfsm_reqdone; 1127 return (error); 1128 } 1129 1130 /* 1131 * nfs read rpc call 1132 * Ditto above 1133 */ 1134 int 1135 nfs_readrpc(vp, uiop) 1136 struct vnode *vp; 1137 struct uio *uiop; 1138 { 1139 u_int32_t *tl; 1140 caddr_t cp; 1141 int32_t t1, t2; 1142 caddr_t bpos, dpos, cp2; 1143 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1144 struct nfsmount *nmp; 1145 int error = 0, len, retlen, tsiz, eof, attrflag; 1146 const int v3 = NFS_ISV3(vp); 1147 1148 #ifndef nolint 1149 eof = 0; 1150 #endif 1151 nmp = VFSTONFS(vp->v_mount); 1152 tsiz = uiop->uio_resid; 1153 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1154 return (EFBIG); 1155 while (tsiz > 0) { 1156 nfsstats.rpccnt[NFSPROC_READ]++; 1157 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz; 1158 nfsm_reqhead(vp, NFSPROC_READ, NFSX_FH(v3) + NFSX_UNSIGNED * 3); 1159 nfsm_fhtom(vp, v3); 1160 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED * 3); 1161 if (v3) { 1162 txdr_hyper(uiop->uio_offset, tl); 1163 *(tl + 2) = txdr_unsigned(len); 1164 } else { 1165 *tl++ = txdr_unsigned(uiop->uio_offset); 1166 *tl++ = txdr_unsigned(len); 1167 *tl = 0; 1168 } 1169 nfsm_request(vp, NFSPROC_READ, uiop->uio_procp, 1170 VTONFS(vp)->n_rcred); 1171 if (v3) { 1172 nfsm_postop_attr(vp, attrflag); 1173 if (error) { 1174 m_freem(mrep); 1175 goto nfsmout; 1176 } 1177 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1178 eof = fxdr_unsigned(int, *(tl + 1)); 1179 } else 1180 nfsm_loadattr(vp, (struct vattr *)0); 1181 nfsm_strsiz(retlen, nmp->nm_rsize); 1182 nfsm_mtouio(uiop, retlen); 1183 m_freem(mrep); 1184 tsiz -= retlen; 1185 if (v3) { 1186 if (eof || retlen == 0) 1187 tsiz = 0; 1188 } else if (retlen < len) 1189 tsiz = 0; 1190 } 1191 nfsmout: 1192 return (error); 1193 } 1194 1195 /* 1196 * nfs write call 1197 */ 1198 int 1199 nfs_writerpc(vp, uiop, iomode, must_commit) 1200 struct vnode *vp; 1201 struct uio *uiop; 1202 int *iomode, *must_commit; 1203 { 1204 u_int32_t *tl; 1205 caddr_t cp; 1206 int32_t t1, t2, backup; 1207 caddr_t bpos, dpos, cp2; 1208 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1209 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1210 int error = 0, len, tsiz, wccflag = NFSV3_WCCRATTR, rlen, commit; 1211 const int v3 = NFS_ISV3(vp); 1212 int committed = NFSV3WRITE_FILESYNC; 1213 1214 if (vp->v_mount->mnt_flag & MNT_RDONLY) { 1215 panic("writerpc readonly vp %p", vp); 1216 } 1217 1218 #ifdef DIAGNOSTIC 1219 if (uiop->uio_iovcnt != 1) 1220 panic("nfs: writerpc iovcnt > 1"); 1221 #endif 1222 *must_commit = 0; 1223 tsiz = uiop->uio_resid; 1224 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1225 return (EFBIG); 1226 while (tsiz > 0) { 1227 nfsstats.rpccnt[NFSPROC_WRITE]++; 1228 len = min(tsiz, nmp->nm_wsize); 1229 nfsm_reqhead(vp, NFSPROC_WRITE, 1230 NFSX_FH(v3) + 5 * NFSX_UNSIGNED + nfsm_rndup(len)); 1231 nfsm_fhtom(vp, v3); 1232 if (v3) { 1233 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 1234 txdr_hyper(uiop->uio_offset, tl); 1235 tl += 2; 1236 *tl++ = txdr_unsigned(len); 1237 *tl++ = txdr_unsigned(*iomode); 1238 *tl = txdr_unsigned(len); 1239 } else { 1240 u_int32_t x; 1241 1242 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1243 /* Set both "begin" and "current" to non-garbage. */ 1244 x = txdr_unsigned((u_int32_t)uiop->uio_offset); 1245 *tl++ = x; /* "begin offset" */ 1246 *tl++ = x; /* "current offset" */ 1247 x = txdr_unsigned(len); 1248 *tl++ = x; /* total to this offset */ 1249 *tl = x; /* size of this write */ 1250 1251 } 1252 nfsm_uiotom(uiop, len); 1253 nfsm_request(vp, NFSPROC_WRITE, uiop->uio_procp, 1254 VTONFS(vp)->n_wcred); 1255 if (v3) { 1256 wccflag = NFSV3_WCCCHK; 1257 nfsm_wcc_data(vp, wccflag); 1258 if (!error) { 1259 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED 1260 + NFSX_V3WRITEVERF); 1261 rlen = fxdr_unsigned(int, *tl++); 1262 if (rlen == 0) { 1263 error = NFSERR_IO; 1264 m_freem(mrep); 1265 break; 1266 } else if (rlen < len) { 1267 backup = len - rlen; 1268 uiop->uio_iov->iov_base = 1269 (caddr_t)uiop->uio_iov->iov_base - 1270 backup; 1271 uiop->uio_iov->iov_len += backup; 1272 uiop->uio_offset -= backup; 1273 uiop->uio_resid += backup; 1274 len = rlen; 1275 } 1276 commit = fxdr_unsigned(int, *tl++); 1277 1278 /* 1279 * Return the lowest committment level 1280 * obtained by any of the RPCs. 1281 */ 1282 if (committed == NFSV3WRITE_FILESYNC) 1283 committed = commit; 1284 else if (committed == NFSV3WRITE_DATASYNC && 1285 commit == NFSV3WRITE_UNSTABLE) 1286 committed = commit; 1287 if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0){ 1288 memcpy((caddr_t)nmp->nm_verf, (caddr_t)tl, 1289 NFSX_V3WRITEVERF); 1290 nmp->nm_iflag |= NFSMNT_HASWRITEVERF; 1291 } else if (memcmp((caddr_t)tl, 1292 (caddr_t)nmp->nm_verf, NFSX_V3WRITEVERF)) { 1293 *must_commit = 1; 1294 memcpy((caddr_t)nmp->nm_verf, (caddr_t)tl, 1295 NFSX_V3WRITEVERF); 1296 } 1297 } 1298 } else 1299 nfsm_loadattr(vp, (struct vattr *)0); 1300 if (wccflag) 1301 VTONFS(vp)->n_mtime = VTONFS(vp)->n_vattr->va_mtime.tv_sec; 1302 m_freem(mrep); 1303 if (error) 1304 break; 1305 tsiz -= len; 1306 } 1307 nfsmout: 1308 *iomode = committed; 1309 if (error) 1310 uiop->uio_resid = tsiz; 1311 return (error); 1312 } 1313 1314 /* 1315 * nfs mknod rpc 1316 * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the 1317 * mode set to specify the file type and the size field for rdev. 1318 */ 1319 int 1320 nfs_mknodrpc(dvp, vpp, cnp, vap) 1321 struct vnode *dvp; 1322 struct vnode **vpp; 1323 struct componentname *cnp; 1324 struct vattr *vap; 1325 { 1326 struct nfsv2_sattr *sp; 1327 u_int32_t *tl; 1328 caddr_t cp; 1329 int32_t t1, t2; 1330 struct vnode *newvp = (struct vnode *)0; 1331 struct nfsnode *np; 1332 char *cp2; 1333 caddr_t bpos, dpos; 1334 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0; 1335 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1336 u_int32_t rdev; 1337 const int v3 = NFS_ISV3(dvp); 1338 1339 if (vap->va_type == VCHR || vap->va_type == VBLK) 1340 rdev = txdr_unsigned(vap->va_rdev); 1341 else if (vap->va_type == VFIFO || vap->va_type == VSOCK) 1342 rdev = nfs_xdrneg1; 1343 else { 1344 VOP_ABORTOP(dvp, cnp); 1345 vput(dvp); 1346 return (EOPNOTSUPP); 1347 } 1348 nfsstats.rpccnt[NFSPROC_MKNOD]++; 1349 nfsm_reqhead(dvp, NFSPROC_MKNOD, NFSX_FH(v3) + 4 * NFSX_UNSIGNED + 1350 + nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1351 nfsm_fhtom(dvp, v3); 1352 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1353 if (v3) { 1354 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1355 *tl++ = vtonfsv3_type(vap->va_type); 1356 nfsm_v3attrbuild(vap, FALSE); 1357 if (vap->va_type == VCHR || vap->va_type == VBLK) { 1358 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1359 *tl++ = txdr_unsigned(major(vap->va_rdev)); 1360 *tl = txdr_unsigned(minor(vap->va_rdev)); 1361 } 1362 } else { 1363 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1364 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1365 sp->sa_uid = nfs_xdrneg1; 1366 sp->sa_gid = nfs_xdrneg1; 1367 sp->sa_size = rdev; 1368 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1369 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1370 } 1371 nfsm_request(dvp, NFSPROC_MKNOD, cnp->cn_proc, cnp->cn_cred); 1372 if (!error) { 1373 nfsm_mtofh(dvp, newvp, v3, gotvp); 1374 if (!gotvp) { 1375 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1376 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np); 1377 if (!error) 1378 newvp = NFSTOV(np); 1379 } 1380 } 1381 if (v3) 1382 nfsm_wcc_data(dvp, wccflag); 1383 nfsm_reqdone; 1384 if (error) { 1385 if (newvp) 1386 vput(newvp); 1387 } else { 1388 if (cnp->cn_flags & MAKEENTRY) 1389 cache_enter(dvp, newvp, cnp); 1390 *vpp = newvp; 1391 } 1392 PNBUF_PUT(cnp->cn_pnbuf); 1393 VTONFS(dvp)->n_flag |= NMODIFIED; 1394 if (!wccflag) 1395 VTONFS(dvp)->n_attrstamp = 0; 1396 vput(dvp); 1397 return (error); 1398 } 1399 1400 /* 1401 * nfs mknod vop 1402 * just call nfs_mknodrpc() to do the work. 1403 */ 1404 /* ARGSUSED */ 1405 int 1406 nfs_mknod(v) 1407 void *v; 1408 { 1409 struct vop_mknod_args /* { 1410 struct vnode *a_dvp; 1411 struct vnode **a_vpp; 1412 struct componentname *a_cnp; 1413 struct vattr *a_vap; 1414 } */ *ap = v; 1415 int error; 1416 1417 error = nfs_mknodrpc(ap->a_dvp, ap->a_vpp, ap->a_cnp, ap->a_vap); 1418 return (error); 1419 } 1420 1421 static u_long create_verf; 1422 /* 1423 * nfs file create call 1424 */ 1425 int 1426 nfs_create(v) 1427 void *v; 1428 { 1429 struct vop_create_args /* { 1430 struct vnode *a_dvp; 1431 struct vnode **a_vpp; 1432 struct componentname *a_cnp; 1433 struct vattr *a_vap; 1434 } */ *ap = v; 1435 struct vnode *dvp = ap->a_dvp; 1436 struct vattr *vap = ap->a_vap; 1437 struct componentname *cnp = ap->a_cnp; 1438 struct nfsv2_sattr *sp; 1439 u_int32_t *tl; 1440 caddr_t cp; 1441 int32_t t1, t2; 1442 struct nfsnode *np = (struct nfsnode *)0; 1443 struct vnode *newvp = (struct vnode *)0; 1444 caddr_t bpos, dpos, cp2; 1445 int error, wccflag = NFSV3_WCCRATTR, gotvp = 0, fmode = 0; 1446 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1447 const int v3 = NFS_ISV3(dvp); 1448 1449 /* 1450 * Oops, not for me.. 1451 */ 1452 if (vap->va_type == VSOCK) 1453 return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap)); 1454 1455 #ifdef VA_EXCLUSIVE 1456 if (vap->va_vaflags & VA_EXCLUSIVE) 1457 fmode |= O_EXCL; 1458 #endif 1459 again: 1460 error = 0; 1461 nfsstats.rpccnt[NFSPROC_CREATE]++; 1462 nfsm_reqhead(dvp, NFSPROC_CREATE, NFSX_FH(v3) + 2 * NFSX_UNSIGNED + 1463 nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1464 nfsm_fhtom(dvp, v3); 1465 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1466 if (v3) { 1467 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1468 if (fmode & O_EXCL) { 1469 *tl = txdr_unsigned(NFSV3CREATE_EXCLUSIVE); 1470 nfsm_build(tl, u_int32_t *, NFSX_V3CREATEVERF); 1471 #ifdef INET 1472 if (in_ifaddr.tqh_first) 1473 *tl++ = in_ifaddr.tqh_first->ia_addr.sin_addr.s_addr; 1474 else 1475 *tl++ = create_verf; 1476 #else 1477 *tl++ = create_verf; 1478 #endif 1479 *tl = ++create_verf; 1480 } else { 1481 *tl = txdr_unsigned(NFSV3CREATE_UNCHECKED); 1482 nfsm_v3attrbuild(vap, FALSE); 1483 } 1484 } else { 1485 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1486 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1487 sp->sa_uid = nfs_xdrneg1; 1488 sp->sa_gid = nfs_xdrneg1; 1489 sp->sa_size = 0; 1490 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1491 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1492 } 1493 nfsm_request(dvp, NFSPROC_CREATE, cnp->cn_proc, cnp->cn_cred); 1494 if (!error) { 1495 nfsm_mtofh(dvp, newvp, v3, gotvp); 1496 if (!gotvp) { 1497 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1498 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np); 1499 if (!error) 1500 newvp = NFSTOV(np); 1501 } 1502 } 1503 if (v3) 1504 nfsm_wcc_data(dvp, wccflag); 1505 nfsm_reqdone; 1506 if (error) { 1507 if (v3 && (fmode & O_EXCL) && error == NFSERR_NOTSUPP) { 1508 fmode &= ~O_EXCL; 1509 goto again; 1510 } 1511 if (newvp) 1512 vput(newvp); 1513 } else if (v3 && (fmode & O_EXCL)) 1514 error = nfs_setattrrpc(newvp, vap, cnp->cn_cred, cnp->cn_proc); 1515 if (!error) { 1516 if (cnp->cn_flags & MAKEENTRY) 1517 cache_enter(dvp, newvp, cnp); 1518 *ap->a_vpp = newvp; 1519 } 1520 PNBUF_PUT(cnp->cn_pnbuf); 1521 VTONFS(dvp)->n_flag |= NMODIFIED; 1522 if (!wccflag) 1523 VTONFS(dvp)->n_attrstamp = 0; 1524 vput(dvp); 1525 return (error); 1526 } 1527 1528 /* 1529 * nfs file remove call 1530 * To try and make nfs semantics closer to ufs semantics, a file that has 1531 * other processes using the vnode is renamed instead of removed and then 1532 * removed later on the last close. 1533 * - If v_usecount > 1 1534 * If a rename is not already in the works 1535 * call nfs_sillyrename() to set it up 1536 * else 1537 * do the remove rpc 1538 */ 1539 int 1540 nfs_remove(v) 1541 void *v; 1542 { 1543 struct vop_remove_args /* { 1544 struct vnodeop_desc *a_desc; 1545 struct vnode * a_dvp; 1546 struct vnode * a_vp; 1547 struct componentname * a_cnp; 1548 } */ *ap = v; 1549 struct vnode *vp = ap->a_vp; 1550 struct vnode *dvp = ap->a_dvp; 1551 struct componentname *cnp = ap->a_cnp; 1552 struct nfsnode *np = VTONFS(vp); 1553 int error = 0; 1554 struct vattr vattr; 1555 1556 #ifndef DIAGNOSTIC 1557 if ((cnp->cn_flags & HASBUF) == 0) 1558 panic("nfs_remove: no name"); 1559 if (vp->v_usecount < 1) 1560 panic("nfs_remove: bad v_usecount"); 1561 #endif 1562 if (vp->v_type == VDIR) 1563 error = EPERM; 1564 else if (vp->v_usecount == 1 || (np->n_sillyrename && 1565 VOP_GETATTR(vp, &vattr, cnp->cn_cred, cnp->cn_proc) == 0 && 1566 vattr.va_nlink > 1)) { 1567 /* 1568 * Purge the name cache so that the chance of a lookup for 1569 * the name succeeding while the remove is in progress is 1570 * minimized. Without node locking it can still happen, such 1571 * that an I/O op returns ESTALE, but since you get this if 1572 * another host removes the file.. 1573 */ 1574 cache_purge(vp); 1575 /* 1576 * throw away biocache buffers, mainly to avoid 1577 * unnecessary delayed writes later. 1578 */ 1579 error = nfs_vinvalbuf(vp, 0, cnp->cn_cred, cnp->cn_proc, 1); 1580 /* Do the rpc */ 1581 if (error != EINTR) 1582 error = nfs_removerpc(dvp, cnp->cn_nameptr, 1583 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc); 1584 /* 1585 * Kludge City: If the first reply to the remove rpc is lost.. 1586 * the reply to the retransmitted request will be ENOENT 1587 * since the file was in fact removed 1588 * Therefore, we cheat and return success. 1589 */ 1590 if (error == ENOENT) 1591 error = 0; 1592 } else if (!np->n_sillyrename) 1593 error = nfs_sillyrename(dvp, vp, cnp); 1594 PNBUF_PUT(cnp->cn_pnbuf); 1595 np->n_attrstamp = 0; 1596 if (dvp == vp) 1597 vrele(vp); 1598 else 1599 vput(vp); 1600 vput(dvp); 1601 return (error); 1602 } 1603 1604 /* 1605 * nfs file remove rpc called from nfs_inactive 1606 */ 1607 int 1608 nfs_removeit(sp) 1609 struct sillyrename *sp; 1610 { 1611 1612 return (nfs_removerpc(sp->s_dvp, sp->s_name, sp->s_namlen, sp->s_cred, 1613 (struct proc *)0)); 1614 } 1615 1616 /* 1617 * Nfs remove rpc, called from nfs_remove() and nfs_removeit(). 1618 */ 1619 int 1620 nfs_removerpc(dvp, name, namelen, cred, proc) 1621 struct vnode *dvp; 1622 const char *name; 1623 int namelen; 1624 struct ucred *cred; 1625 struct proc *proc; 1626 { 1627 u_int32_t *tl; 1628 caddr_t cp; 1629 int32_t t1, t2; 1630 caddr_t bpos, dpos, cp2; 1631 int error = 0, wccflag = NFSV3_WCCRATTR; 1632 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1633 const int v3 = NFS_ISV3(dvp); 1634 1635 nfsstats.rpccnt[NFSPROC_REMOVE]++; 1636 nfsm_reqhead(dvp, NFSPROC_REMOVE, 1637 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(namelen)); 1638 nfsm_fhtom(dvp, v3); 1639 nfsm_strtom(name, namelen, NFS_MAXNAMLEN); 1640 nfsm_request(dvp, NFSPROC_REMOVE, proc, cred); 1641 if (v3) 1642 nfsm_wcc_data(dvp, wccflag); 1643 nfsm_reqdone; 1644 VTONFS(dvp)->n_flag |= NMODIFIED; 1645 if (!wccflag) 1646 VTONFS(dvp)->n_attrstamp = 0; 1647 return (error); 1648 } 1649 1650 /* 1651 * nfs file rename call 1652 */ 1653 int 1654 nfs_rename(v) 1655 void *v; 1656 { 1657 struct vop_rename_args /* { 1658 struct vnode *a_fdvp; 1659 struct vnode *a_fvp; 1660 struct componentname *a_fcnp; 1661 struct vnode *a_tdvp; 1662 struct vnode *a_tvp; 1663 struct componentname *a_tcnp; 1664 } */ *ap = v; 1665 struct vnode *fvp = ap->a_fvp; 1666 struct vnode *tvp = ap->a_tvp; 1667 struct vnode *fdvp = ap->a_fdvp; 1668 struct vnode *tdvp = ap->a_tdvp; 1669 struct componentname *tcnp = ap->a_tcnp; 1670 struct componentname *fcnp = ap->a_fcnp; 1671 int error; 1672 1673 #ifndef DIAGNOSTIC 1674 if ((tcnp->cn_flags & HASBUF) == 0 || 1675 (fcnp->cn_flags & HASBUF) == 0) 1676 panic("nfs_rename: no name"); 1677 #endif 1678 /* Check for cross-device rename */ 1679 if ((fvp->v_mount != tdvp->v_mount) || 1680 (tvp && (fvp->v_mount != tvp->v_mount))) { 1681 error = EXDEV; 1682 goto out; 1683 } 1684 1685 /* 1686 * If the tvp exists and is in use, sillyrename it before doing the 1687 * rename of the new file over it. 1688 */ 1689 if (tvp && tvp->v_usecount > 1 && !VTONFS(tvp)->n_sillyrename && 1690 tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp)) { 1691 vput(tvp); 1692 tvp = NULL; 1693 } 1694 1695 error = nfs_renamerpc(fdvp, fcnp->cn_nameptr, fcnp->cn_namelen, 1696 tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred, 1697 tcnp->cn_proc); 1698 1699 if (fvp->v_type == VDIR) { 1700 if (tvp != NULL && tvp->v_type == VDIR) 1701 cache_purge(tdvp); 1702 cache_purge(fdvp); 1703 } 1704 out: 1705 if (tdvp == tvp) 1706 vrele(tdvp); 1707 else 1708 vput(tdvp); 1709 if (tvp) 1710 vput(tvp); 1711 vrele(fdvp); 1712 vrele(fvp); 1713 /* 1714 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry. 1715 */ 1716 if (error == ENOENT) 1717 error = 0; 1718 return (error); 1719 } 1720 1721 /* 1722 * nfs file rename rpc called from nfs_remove() above 1723 */ 1724 int 1725 nfs_renameit(sdvp, scnp, sp) 1726 struct vnode *sdvp; 1727 struct componentname *scnp; 1728 struct sillyrename *sp; 1729 { 1730 return (nfs_renamerpc(sdvp, scnp->cn_nameptr, scnp->cn_namelen, 1731 sdvp, sp->s_name, sp->s_namlen, scnp->cn_cred, scnp->cn_proc)); 1732 } 1733 1734 /* 1735 * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit(). 1736 */ 1737 int 1738 nfs_renamerpc(fdvp, fnameptr, fnamelen, tdvp, tnameptr, tnamelen, cred, proc) 1739 struct vnode *fdvp; 1740 const char *fnameptr; 1741 int fnamelen; 1742 struct vnode *tdvp; 1743 const char *tnameptr; 1744 int tnamelen; 1745 struct ucred *cred; 1746 struct proc *proc; 1747 { 1748 u_int32_t *tl; 1749 caddr_t cp; 1750 int32_t t1, t2; 1751 caddr_t bpos, dpos, cp2; 1752 int error = 0, fwccflag = NFSV3_WCCRATTR, twccflag = NFSV3_WCCRATTR; 1753 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1754 const int v3 = NFS_ISV3(fdvp); 1755 1756 nfsstats.rpccnt[NFSPROC_RENAME]++; 1757 nfsm_reqhead(fdvp, NFSPROC_RENAME, 1758 (NFSX_FH(v3) + NFSX_UNSIGNED)*2 + nfsm_rndup(fnamelen) + 1759 nfsm_rndup(tnamelen)); 1760 nfsm_fhtom(fdvp, v3); 1761 nfsm_strtom(fnameptr, fnamelen, NFS_MAXNAMLEN); 1762 nfsm_fhtom(tdvp, v3); 1763 nfsm_strtom(tnameptr, tnamelen, NFS_MAXNAMLEN); 1764 nfsm_request(fdvp, NFSPROC_RENAME, proc, cred); 1765 if (v3) { 1766 nfsm_wcc_data(fdvp, fwccflag); 1767 nfsm_wcc_data(tdvp, twccflag); 1768 } 1769 nfsm_reqdone; 1770 VTONFS(fdvp)->n_flag |= NMODIFIED; 1771 VTONFS(tdvp)->n_flag |= NMODIFIED; 1772 if (!fwccflag) 1773 VTONFS(fdvp)->n_attrstamp = 0; 1774 if (!twccflag) 1775 VTONFS(tdvp)->n_attrstamp = 0; 1776 return (error); 1777 } 1778 1779 /* 1780 * nfs hard link create call 1781 */ 1782 int 1783 nfs_link(v) 1784 void *v; 1785 { 1786 struct vop_link_args /* { 1787 struct vnode *a_dvp; 1788 struct vnode *a_vp; 1789 struct componentname *a_cnp; 1790 } */ *ap = v; 1791 struct vnode *vp = ap->a_vp; 1792 struct vnode *dvp = ap->a_dvp; 1793 struct componentname *cnp = ap->a_cnp; 1794 u_int32_t *tl; 1795 caddr_t cp; 1796 int32_t t1, t2; 1797 caddr_t bpos, dpos, cp2; 1798 int error = 0, wccflag = NFSV3_WCCRATTR, attrflag = 0; 1799 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1800 /* XXX Should be const and initialised? */ 1801 int v3; 1802 1803 if (dvp->v_mount != vp->v_mount) { 1804 VOP_ABORTOP(dvp, cnp); 1805 vput(dvp); 1806 return (EXDEV); 1807 } 1808 if (dvp != vp) { 1809 error = vn_lock(vp, LK_EXCLUSIVE); 1810 if (error != 0) { 1811 VOP_ABORTOP(dvp, cnp); 1812 vput(dvp); 1813 return error; 1814 } 1815 } 1816 1817 /* 1818 * Push all writes to the server, so that the attribute cache 1819 * doesn't get "out of sync" with the server. 1820 * XXX There should be a better way! 1821 */ 1822 VOP_FSYNC(vp, cnp->cn_cred, FSYNC_WAIT, 0, 0, cnp->cn_proc); 1823 1824 v3 = NFS_ISV3(vp); 1825 nfsstats.rpccnt[NFSPROC_LINK]++; 1826 nfsm_reqhead(vp, NFSPROC_LINK, 1827 NFSX_FH(v3)*2 + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 1828 nfsm_fhtom(vp, v3); 1829 nfsm_fhtom(dvp, v3); 1830 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1831 nfsm_request(vp, NFSPROC_LINK, cnp->cn_proc, cnp->cn_cred); 1832 if (v3) { 1833 nfsm_postop_attr(vp, attrflag); 1834 nfsm_wcc_data(dvp, wccflag); 1835 } 1836 nfsm_reqdone; 1837 PNBUF_PUT(cnp->cn_pnbuf); 1838 VTONFS(dvp)->n_flag |= NMODIFIED; 1839 if (!attrflag) 1840 VTONFS(vp)->n_attrstamp = 0; 1841 if (!wccflag) 1842 VTONFS(dvp)->n_attrstamp = 0; 1843 if (dvp != vp) 1844 VOP_UNLOCK(vp, 0); 1845 vput(dvp); 1846 /* 1847 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 1848 */ 1849 if (error == EEXIST) 1850 error = 0; 1851 return (error); 1852 } 1853 1854 /* 1855 * nfs symbolic link create call 1856 */ 1857 int 1858 nfs_symlink(v) 1859 void *v; 1860 { 1861 struct vop_symlink_args /* { 1862 struct vnode *a_dvp; 1863 struct vnode **a_vpp; 1864 struct componentname *a_cnp; 1865 struct vattr *a_vap; 1866 char *a_target; 1867 } */ *ap = v; 1868 struct vnode *dvp = ap->a_dvp; 1869 struct vattr *vap = ap->a_vap; 1870 struct componentname *cnp = ap->a_cnp; 1871 struct nfsv2_sattr *sp; 1872 u_int32_t *tl; 1873 caddr_t cp; 1874 int32_t t1, t2; 1875 caddr_t bpos, dpos, cp2; 1876 int slen, error = 0, wccflag = NFSV3_WCCRATTR, gotvp; 1877 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1878 struct vnode *newvp = (struct vnode *)0; 1879 const int v3 = NFS_ISV3(dvp); 1880 1881 *ap->a_vpp = NULL; 1882 nfsstats.rpccnt[NFSPROC_SYMLINK]++; 1883 slen = strlen(ap->a_target); 1884 nfsm_reqhead(dvp, NFSPROC_SYMLINK, NFSX_FH(v3) + 2*NFSX_UNSIGNED + 1885 nfsm_rndup(cnp->cn_namelen) + nfsm_rndup(slen) + NFSX_SATTR(v3)); 1886 nfsm_fhtom(dvp, v3); 1887 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1888 if (v3) 1889 nfsm_v3attrbuild(vap, FALSE); 1890 nfsm_strtom(ap->a_target, slen, NFS_MAXPATHLEN); 1891 if (!v3) { 1892 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1893 sp->sa_mode = vtonfsv2_mode(VLNK, vap->va_mode); 1894 sp->sa_uid = nfs_xdrneg1; 1895 sp->sa_gid = nfs_xdrneg1; 1896 sp->sa_size = nfs_xdrneg1; 1897 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1898 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1899 } 1900 nfsm_request(dvp, NFSPROC_SYMLINK, cnp->cn_proc, cnp->cn_cred); 1901 if (v3) { 1902 if (!error) 1903 nfsm_mtofh(dvp, newvp, v3, gotvp); 1904 nfsm_wcc_data(dvp, wccflag); 1905 } 1906 nfsm_reqdone; 1907 /* 1908 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 1909 */ 1910 if (error == EEXIST) 1911 error = 0; 1912 if (error == 0 && newvp == NULL) { 1913 struct nfsnode *np = NULL; 1914 1915 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen, 1916 cnp->cn_cred, cnp->cn_proc, &np); 1917 if (error == 0) 1918 newvp = NFSTOV(np); 1919 } 1920 if (error) { 1921 if (newvp != NULL) 1922 vput(newvp); 1923 } else { 1924 *ap->a_vpp = newvp; 1925 } 1926 PNBUF_PUT(cnp->cn_pnbuf); 1927 VTONFS(dvp)->n_flag |= NMODIFIED; 1928 if (!wccflag) 1929 VTONFS(dvp)->n_attrstamp = 0; 1930 vput(dvp); 1931 return (error); 1932 } 1933 1934 /* 1935 * nfs make dir call 1936 */ 1937 int 1938 nfs_mkdir(v) 1939 void *v; 1940 { 1941 struct vop_mkdir_args /* { 1942 struct vnode *a_dvp; 1943 struct vnode **a_vpp; 1944 struct componentname *a_cnp; 1945 struct vattr *a_vap; 1946 } */ *ap = v; 1947 struct vnode *dvp = ap->a_dvp; 1948 struct vattr *vap = ap->a_vap; 1949 struct componentname *cnp = ap->a_cnp; 1950 struct nfsv2_sattr *sp; 1951 u_int32_t *tl; 1952 caddr_t cp; 1953 int32_t t1, t2; 1954 int len; 1955 struct nfsnode *np = (struct nfsnode *)0; 1956 struct vnode *newvp = (struct vnode *)0; 1957 caddr_t bpos, dpos, cp2; 1958 int error = 0, wccflag = NFSV3_WCCRATTR; 1959 int gotvp = 0; 1960 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1961 const int v3 = NFS_ISV3(dvp); 1962 1963 len = cnp->cn_namelen; 1964 nfsstats.rpccnt[NFSPROC_MKDIR]++; 1965 nfsm_reqhead(dvp, NFSPROC_MKDIR, 1966 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len) + NFSX_SATTR(v3)); 1967 nfsm_fhtom(dvp, v3); 1968 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 1969 if (v3) { 1970 nfsm_v3attrbuild(vap, FALSE); 1971 } else { 1972 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1973 sp->sa_mode = vtonfsv2_mode(VDIR, vap->va_mode); 1974 sp->sa_uid = nfs_xdrneg1; 1975 sp->sa_gid = nfs_xdrneg1; 1976 sp->sa_size = nfs_xdrneg1; 1977 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1978 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1979 } 1980 nfsm_request(dvp, NFSPROC_MKDIR, cnp->cn_proc, cnp->cn_cred); 1981 if (!error) 1982 nfsm_mtofh(dvp, newvp, v3, gotvp); 1983 if (v3) 1984 nfsm_wcc_data(dvp, wccflag); 1985 nfsm_reqdone; 1986 VTONFS(dvp)->n_flag |= NMODIFIED; 1987 if (!wccflag) 1988 VTONFS(dvp)->n_attrstamp = 0; 1989 /* 1990 * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry 1991 * if we can succeed in looking up the directory. 1992 */ 1993 if (error == EEXIST || (!error && !gotvp)) { 1994 if (newvp) { 1995 vput(newvp); 1996 newvp = (struct vnode *)0; 1997 } 1998 error = nfs_lookitup(dvp, cnp->cn_nameptr, len, cnp->cn_cred, 1999 cnp->cn_proc, &np); 2000 if (!error) { 2001 newvp = NFSTOV(np); 2002 if (newvp->v_type != VDIR) 2003 error = EEXIST; 2004 } 2005 } 2006 if (error) { 2007 if (newvp) 2008 vput(newvp); 2009 } else { 2010 if (cnp->cn_flags & MAKEENTRY) 2011 cache_enter(dvp, newvp, cnp); 2012 *ap->a_vpp = newvp; 2013 } 2014 PNBUF_PUT(cnp->cn_pnbuf); 2015 vput(dvp); 2016 return (error); 2017 } 2018 2019 /* 2020 * nfs remove directory call 2021 */ 2022 int 2023 nfs_rmdir(v) 2024 void *v; 2025 { 2026 struct vop_rmdir_args /* { 2027 struct vnode *a_dvp; 2028 struct vnode *a_vp; 2029 struct componentname *a_cnp; 2030 } */ *ap = v; 2031 struct vnode *vp = ap->a_vp; 2032 struct vnode *dvp = ap->a_dvp; 2033 struct componentname *cnp = ap->a_cnp; 2034 u_int32_t *tl; 2035 caddr_t cp; 2036 int32_t t1, t2; 2037 caddr_t bpos, dpos, cp2; 2038 int error = 0, wccflag = NFSV3_WCCRATTR; 2039 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2040 const int v3 = NFS_ISV3(dvp); 2041 2042 if (dvp == vp) { 2043 vrele(dvp); 2044 vput(dvp); 2045 PNBUF_PUT(cnp->cn_pnbuf); 2046 return (EINVAL); 2047 } 2048 nfsstats.rpccnt[NFSPROC_RMDIR]++; 2049 nfsm_reqhead(dvp, NFSPROC_RMDIR, 2050 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 2051 nfsm_fhtom(dvp, v3); 2052 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 2053 nfsm_request(dvp, NFSPROC_RMDIR, cnp->cn_proc, cnp->cn_cred); 2054 if (v3) 2055 nfsm_wcc_data(dvp, wccflag); 2056 nfsm_reqdone; 2057 PNBUF_PUT(cnp->cn_pnbuf); 2058 VTONFS(dvp)->n_flag |= NMODIFIED; 2059 if (!wccflag) 2060 VTONFS(dvp)->n_attrstamp = 0; 2061 cache_purge(dvp); 2062 cache_purge(vp); 2063 vput(vp); 2064 vput(dvp); 2065 /* 2066 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry. 2067 */ 2068 if (error == ENOENT) 2069 error = 0; 2070 return (error); 2071 } 2072 2073 /* 2074 * nfs readdir call 2075 */ 2076 int 2077 nfs_readdir(v) 2078 void *v; 2079 { 2080 struct vop_readdir_args /* { 2081 struct vnode *a_vp; 2082 struct uio *a_uio; 2083 struct ucred *a_cred; 2084 int *a_eofflag; 2085 off_t **a_cookies; 2086 int *a_ncookies; 2087 } */ *ap = v; 2088 struct vnode *vp = ap->a_vp; 2089 struct uio *uio = ap->a_uio; 2090 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2091 char *base = uio->uio_iov->iov_base; 2092 int tresid, error; 2093 size_t count, lost; 2094 struct dirent *dp; 2095 off_t *cookies = NULL; 2096 int ncookies = 0, nc; 2097 2098 if (vp->v_type != VDIR) 2099 return (EPERM); 2100 2101 lost = uio->uio_resid & (NFS_DIRFRAGSIZ - 1); 2102 count = uio->uio_resid - lost; 2103 if (count <= 0) 2104 return (EINVAL); 2105 2106 /* 2107 * Call nfs_bioread() to do the real work. 2108 */ 2109 tresid = uio->uio_resid = count; 2110 error = nfs_bioread(vp, uio, 0, ap->a_cred, 2111 ap->a_cookies ? NFSBIO_CACHECOOKIES : 0); 2112 2113 if (!error && ap->a_cookies) { 2114 ncookies = count / 16; 2115 cookies = malloc(sizeof (off_t) * ncookies, M_TEMP, M_WAITOK); 2116 *ap->a_cookies = cookies; 2117 } 2118 2119 if (!error && uio->uio_resid == tresid) { 2120 uio->uio_resid += lost; 2121 nfsstats.direofcache_misses++; 2122 if (ap->a_cookies) 2123 *ap->a_ncookies = 0; 2124 *ap->a_eofflag = 1; 2125 return (0); 2126 } 2127 2128 if (!error && ap->a_cookies) { 2129 /* 2130 * Only the NFS server and emulations use cookies, and they 2131 * load the directory block into system space, so we can 2132 * just look at it directly. 2133 */ 2134 if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1) 2135 panic("nfs_readdir: lost in space"); 2136 for (nc = 0; ncookies-- && 2137 base < (char *)uio->uio_iov->iov_base; nc++){ 2138 dp = (struct dirent *) base; 2139 if (dp->d_reclen == 0) 2140 break; 2141 if (nmp->nm_flag & NFSMNT_XLATECOOKIE) 2142 *(cookies++) = (off_t)NFS_GETCOOKIE32(dp); 2143 else 2144 *(cookies++) = NFS_GETCOOKIE(dp); 2145 base += dp->d_reclen; 2146 } 2147 uio->uio_resid += 2148 ((caddr_t)uio->uio_iov->iov_base - base); 2149 uio->uio_iov->iov_len += 2150 ((caddr_t)uio->uio_iov->iov_base - base); 2151 uio->uio_iov->iov_base = base; 2152 *ap->a_ncookies = nc; 2153 } 2154 2155 uio->uio_resid += lost; 2156 *ap->a_eofflag = 0; 2157 return (error); 2158 } 2159 2160 /* 2161 * Readdir rpc call. 2162 * Called from below the buffer cache by nfs_doio(). 2163 */ 2164 int 2165 nfs_readdirrpc(vp, uiop, cred) 2166 struct vnode *vp; 2167 struct uio *uiop; 2168 struct ucred *cred; 2169 { 2170 int len, left; 2171 struct dirent *dp = NULL; 2172 u_int32_t *tl; 2173 caddr_t cp; 2174 int32_t t1, t2; 2175 caddr_t bpos, dpos, cp2; 2176 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2177 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2178 struct nfsnode *dnp = VTONFS(vp); 2179 u_quad_t fileno; 2180 int error = 0, tlen, more_dirs = 1, blksiz = 0, bigenough = 1; 2181 int attrflag, nrpcs = 0, reclen; 2182 const int v3 = NFS_ISV3(vp); 2183 2184 #ifdef DIAGNOSTIC 2185 /* 2186 * Should be called from buffer cache, so only amount of 2187 * NFS_DIRBLKSIZ will be requested. 2188 */ 2189 if (uiop->uio_iovcnt != 1 || (uiop->uio_resid & (NFS_DIRBLKSIZ - 1))) 2190 panic("nfs readdirrpc bad uio"); 2191 #endif 2192 2193 /* 2194 * Loop around doing readdir rpc's of size nm_readdirsize 2195 * truncated to a multiple of NFS_DIRFRAGSIZ. 2196 * The stopping criteria is EOF or buffer full. 2197 */ 2198 while (more_dirs && bigenough) { 2199 /* 2200 * Heuristic: don't bother to do another RPC to further 2201 * fill up this block if there is not much room left. (< 50% 2202 * of the readdir RPC size). This wastes some buffer space 2203 * but can save up to 50% in RPC calls. 2204 */ 2205 if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { 2206 bigenough = 0; 2207 break; 2208 } 2209 nfsstats.rpccnt[NFSPROC_READDIR]++; 2210 nfsm_reqhead(vp, NFSPROC_READDIR, NFSX_FH(v3) + 2211 NFSX_READDIR(v3)); 2212 nfsm_fhtom(vp, v3); 2213 if (v3) { 2214 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 2215 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { 2216 txdr_swapcookie3(uiop->uio_offset, tl); 2217 } else { 2218 txdr_cookie3(uiop->uio_offset, tl); 2219 } 2220 tl += 2; 2221 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2222 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2223 } else { 2224 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2225 *tl++ = txdr_unsigned(uiop->uio_offset); 2226 } 2227 *tl = txdr_unsigned(nmp->nm_readdirsize); 2228 nfsm_request(vp, NFSPROC_READDIR, uiop->uio_procp, cred); 2229 nrpcs++; 2230 if (v3) { 2231 nfsm_postop_attr(vp, attrflag); 2232 if (!error) { 2233 nfsm_dissect(tl, u_int32_t *, 2234 2 * NFSX_UNSIGNED); 2235 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2236 dnp->n_cookieverf.nfsuquad[1] = *tl; 2237 } else { 2238 m_freem(mrep); 2239 goto nfsmout; 2240 } 2241 } 2242 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2243 more_dirs = fxdr_unsigned(int, *tl); 2244 2245 /* loop thru the dir entries, doctoring them to 4bsd form */ 2246 while (more_dirs && bigenough) { 2247 if (v3) { 2248 nfsm_dissect(tl, u_int32_t *, 2249 3 * NFSX_UNSIGNED); 2250 fileno = fxdr_hyper(tl); 2251 len = fxdr_unsigned(int, *(tl + 2)); 2252 } else { 2253 nfsm_dissect(tl, u_int32_t *, 2254 2 * NFSX_UNSIGNED); 2255 fileno = fxdr_unsigned(u_quad_t, *tl++); 2256 len = fxdr_unsigned(int, *tl); 2257 } 2258 if (len <= 0 || len > NFS_MAXNAMLEN) { 2259 error = EBADRPC; 2260 m_freem(mrep); 2261 goto nfsmout; 2262 } 2263 tlen = nfsm_rndup(len); 2264 if (tlen == len) 2265 tlen += 4; /* To ensure null termination */ 2266 tlen += sizeof (off_t) + sizeof (int); 2267 reclen = ALIGN(tlen + DIRHDSIZ); 2268 tlen = reclen - DIRHDSIZ; 2269 left = NFS_DIRFRAGSIZ - blksiz; 2270 if (reclen > left) { 2271 dp->d_reclen += left; 2272 uiop->uio_iov->iov_base = 2273 (caddr_t)uiop->uio_iov->iov_base + left; 2274 uiop->uio_iov->iov_len -= left; 2275 uiop->uio_resid -= left; 2276 blksiz = 0; 2277 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2278 } 2279 if (reclen > uiop->uio_resid) 2280 bigenough = 0; 2281 if (bigenough) { 2282 dp = (struct dirent *)uiop->uio_iov->iov_base; 2283 dp->d_fileno = (int)fileno; 2284 dp->d_namlen = len; 2285 dp->d_reclen = reclen; 2286 dp->d_type = DT_UNKNOWN; 2287 blksiz += dp->d_reclen; 2288 if (blksiz == NFS_DIRFRAGSIZ) 2289 blksiz = 0; 2290 uiop->uio_resid -= DIRHDSIZ; 2291 uiop->uio_iov->iov_base = 2292 (caddr_t)uiop->uio_iov->iov_base + DIRHDSIZ; 2293 uiop->uio_iov->iov_len -= DIRHDSIZ; 2294 nfsm_mtouio(uiop, len); 2295 cp = uiop->uio_iov->iov_base; 2296 tlen -= len; 2297 *cp = '\0'; /* null terminate */ 2298 uiop->uio_iov->iov_base = 2299 (caddr_t)uiop->uio_iov->iov_base + tlen; 2300 uiop->uio_iov->iov_len -= tlen; 2301 uiop->uio_resid -= tlen; 2302 } else 2303 nfsm_adv(nfsm_rndup(len)); 2304 if (v3) { 2305 nfsm_dissect(tl, u_int32_t *, 2306 3 * NFSX_UNSIGNED); 2307 } else { 2308 nfsm_dissect(tl, u_int32_t *, 2309 2 * NFSX_UNSIGNED); 2310 } 2311 if (bigenough) { 2312 if (v3) { 2313 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) 2314 uiop->uio_offset = 2315 fxdr_swapcookie3(tl); 2316 else 2317 uiop->uio_offset = 2318 fxdr_cookie3(tl); 2319 } 2320 else { 2321 uiop->uio_offset = 2322 fxdr_unsigned(off_t, *tl); 2323 } 2324 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2325 } 2326 if (v3) 2327 tl += 2; 2328 else 2329 tl++; 2330 more_dirs = fxdr_unsigned(int, *tl); 2331 } 2332 /* 2333 * If at end of rpc data, get the eof boolean 2334 */ 2335 if (!more_dirs) { 2336 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2337 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2338 } 2339 m_freem(mrep); 2340 } 2341 /* 2342 * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ 2343 * by increasing d_reclen for the last record. 2344 */ 2345 if (blksiz > 0) { 2346 left = NFS_DIRFRAGSIZ - blksiz; 2347 dp->d_reclen += left; 2348 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2349 uiop->uio_iov->iov_base = (caddr_t)uiop->uio_iov->iov_base + 2350 left; 2351 uiop->uio_iov->iov_len -= left; 2352 uiop->uio_resid -= left; 2353 } 2354 2355 /* 2356 * We are now either at the end of the directory or have filled the 2357 * block. 2358 */ 2359 if (bigenough) 2360 dnp->n_direofoffset = uiop->uio_offset; 2361 nfsmout: 2362 return (error); 2363 } 2364 2365 /* 2366 * NFS V3 readdir plus RPC. Used in place of nfs_readdirrpc(). 2367 */ 2368 int 2369 nfs_readdirplusrpc(vp, uiop, cred) 2370 struct vnode *vp; 2371 struct uio *uiop; 2372 struct ucred *cred; 2373 { 2374 int len, left; 2375 struct dirent *dp = NULL; 2376 u_int32_t *tl; 2377 caddr_t cp; 2378 int32_t t1, t2; 2379 struct vnode *newvp; 2380 caddr_t bpos, dpos, cp2; 2381 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2382 struct nameidata nami, *ndp = &nami; 2383 struct componentname *cnp = &ndp->ni_cnd; 2384 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2385 struct nfsnode *dnp = VTONFS(vp), *np; 2386 nfsfh_t *fhp; 2387 u_quad_t fileno; 2388 int error = 0, tlen, more_dirs = 1, blksiz = 0, doit, bigenough = 1, i; 2389 int attrflag, fhsize, nrpcs = 0, reclen; 2390 struct nfs_fattr fattr, *fp; 2391 2392 #ifdef DIAGNOSTIC 2393 if (uiop->uio_iovcnt != 1 || (uiop->uio_resid & (NFS_DIRBLKSIZ - 1))) 2394 panic("nfs readdirplusrpc bad uio"); 2395 #endif 2396 ndp->ni_dvp = vp; 2397 newvp = NULLVP; 2398 2399 /* 2400 * Loop around doing readdir rpc's of size nm_readdirsize 2401 * truncated to a multiple of NFS_DIRFRAGSIZ. 2402 * The stopping criteria is EOF or buffer full. 2403 */ 2404 while (more_dirs && bigenough) { 2405 if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { 2406 bigenough = 0; 2407 break; 2408 } 2409 nfsstats.rpccnt[NFSPROC_READDIRPLUS]++; 2410 nfsm_reqhead(vp, NFSPROC_READDIRPLUS, 2411 NFSX_FH(1) + 6 * NFSX_UNSIGNED); 2412 nfsm_fhtom(vp, 1); 2413 nfsm_build(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 2414 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { 2415 txdr_swapcookie3(uiop->uio_offset, tl); 2416 } else { 2417 txdr_cookie3(uiop->uio_offset, tl); 2418 } 2419 tl += 2; 2420 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2421 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2422 *tl++ = txdr_unsigned(nmp->nm_readdirsize); 2423 *tl = txdr_unsigned(nmp->nm_rsize); 2424 nfsm_request(vp, NFSPROC_READDIRPLUS, uiop->uio_procp, cred); 2425 nfsm_postop_attr(vp, attrflag); 2426 if (error) { 2427 m_freem(mrep); 2428 goto nfsmout; 2429 } 2430 nrpcs++; 2431 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2432 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2433 dnp->n_cookieverf.nfsuquad[1] = *tl++; 2434 more_dirs = fxdr_unsigned(int, *tl); 2435 2436 /* loop thru the dir entries, doctoring them to 4bsd form */ 2437 while (more_dirs && bigenough) { 2438 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2439 fileno = fxdr_hyper(tl); 2440 len = fxdr_unsigned(int, *(tl + 2)); 2441 if (len <= 0 || len > NFS_MAXNAMLEN) { 2442 error = EBADRPC; 2443 m_freem(mrep); 2444 goto nfsmout; 2445 } 2446 tlen = nfsm_rndup(len); 2447 if (tlen == len) 2448 tlen += 4; /* To ensure null termination*/ 2449 tlen += sizeof (off_t) + sizeof (int); 2450 reclen = ALIGN(tlen + DIRHDSIZ); 2451 tlen = reclen - DIRHDSIZ; 2452 left = NFS_DIRFRAGSIZ - blksiz; 2453 if (reclen > left) { 2454 /* 2455 * DIRFRAGSIZ is aligned, no need to align 2456 * again here. 2457 */ 2458 dp->d_reclen += left; 2459 uiop->uio_iov->iov_base = 2460 (caddr_t)uiop->uio_iov->iov_base + left; 2461 uiop->uio_iov->iov_len -= left; 2462 uiop->uio_resid -= left; 2463 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2464 blksiz = 0; 2465 } 2466 if (reclen > uiop->uio_resid) 2467 bigenough = 0; 2468 if (bigenough) { 2469 dp = (struct dirent *)uiop->uio_iov->iov_base; 2470 dp->d_fileno = (int)fileno; 2471 dp->d_namlen = len; 2472 dp->d_reclen = reclen; 2473 dp->d_type = DT_UNKNOWN; 2474 blksiz += dp->d_reclen; 2475 if (blksiz == NFS_DIRFRAGSIZ) 2476 blksiz = 0; 2477 uiop->uio_resid -= DIRHDSIZ; 2478 uiop->uio_iov->iov_base = 2479 (caddr_t)uiop->uio_iov->iov_base + 2480 DIRHDSIZ; 2481 uiop->uio_iov->iov_len -= DIRHDSIZ; 2482 cnp->cn_nameptr = uiop->uio_iov->iov_base; 2483 cnp->cn_namelen = len; 2484 nfsm_mtouio(uiop, len); 2485 cp = uiop->uio_iov->iov_base; 2486 tlen -= len; 2487 *cp = '\0'; 2488 uiop->uio_iov->iov_base = 2489 (caddr_t)uiop->uio_iov->iov_base + tlen; 2490 uiop->uio_iov->iov_len -= tlen; 2491 uiop->uio_resid -= tlen; 2492 } else 2493 nfsm_adv(nfsm_rndup(len)); 2494 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2495 if (bigenough) { 2496 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) 2497 uiop->uio_offset = 2498 fxdr_swapcookie3(tl); 2499 else 2500 uiop->uio_offset = 2501 fxdr_cookie3(tl); 2502 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2503 } 2504 tl += 2; 2505 2506 /* 2507 * Since the attributes are before the file handle 2508 * (sigh), we must skip over the attributes and then 2509 * come back and get them. 2510 */ 2511 attrflag = fxdr_unsigned(int, *tl); 2512 if (attrflag) { 2513 nfsm_dissect(fp, struct nfs_fattr *, NFSX_V3FATTR); 2514 memcpy(&fattr, fp, NFSX_V3FATTR); 2515 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2516 doit = fxdr_unsigned(int, *tl); 2517 if (doit) { 2518 nfsm_getfh(fhp, fhsize, 1); 2519 if (NFS_CMPFH(dnp, fhp, fhsize)) { 2520 VREF(vp); 2521 newvp = vp; 2522 np = dnp; 2523 } else { 2524 error = nfs_nget(vp->v_mount, fhp, 2525 fhsize, &np); 2526 if (!error) 2527 newvp = NFSTOV(np); 2528 } 2529 if (!error) { 2530 const char *cp; 2531 2532 nfs_loadattrcache(&newvp, &fattr, 0); 2533 dp->d_type = 2534 IFTODT(VTTOIF(np->n_vattr->va_type)); 2535 ndp->ni_vp = newvp; 2536 cp = cnp->cn_nameptr + cnp->cn_namelen; 2537 cnp->cn_hash = 2538 namei_hash(cnp->cn_nameptr, &cp); 2539 if (cnp->cn_namelen <= NCHNAMLEN) 2540 cache_enter(ndp->ni_dvp, ndp->ni_vp, 2541 cnp); 2542 } 2543 } 2544 } else { 2545 /* Just skip over the file handle */ 2546 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2547 i = fxdr_unsigned(int, *tl); 2548 nfsm_adv(nfsm_rndup(i)); 2549 } 2550 if (newvp != NULLVP) { 2551 if (newvp == vp) 2552 vrele(newvp); 2553 else 2554 vput(newvp); 2555 newvp = NULLVP; 2556 } 2557 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2558 more_dirs = fxdr_unsigned(int, *tl); 2559 } 2560 /* 2561 * If at end of rpc data, get the eof boolean 2562 */ 2563 if (!more_dirs) { 2564 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2565 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2566 } 2567 m_freem(mrep); 2568 } 2569 /* 2570 * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ 2571 * by increasing d_reclen for the last record. 2572 */ 2573 if (blksiz > 0) { 2574 left = NFS_DIRFRAGSIZ - blksiz; 2575 dp->d_reclen += left; 2576 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2577 uiop->uio_iov->iov_base = (caddr_t)uiop->uio_iov->iov_base + 2578 left; 2579 uiop->uio_iov->iov_len -= left; 2580 uiop->uio_resid -= left; 2581 } 2582 2583 /* 2584 * We are now either at the end of the directory or have filled the 2585 * block. 2586 */ 2587 if (bigenough) 2588 dnp->n_direofoffset = uiop->uio_offset; 2589 nfsmout: 2590 if (newvp != NULLVP) { 2591 if(newvp == vp) 2592 vrele(newvp); 2593 else 2594 vput(newvp); 2595 } 2596 return (error); 2597 } 2598 static char hextoasc[] = "0123456789abcdef"; 2599 2600 /* 2601 * Silly rename. To make the NFS filesystem that is stateless look a little 2602 * more like the "ufs" a remove of an active vnode is translated to a rename 2603 * to a funny looking filename that is removed by nfs_inactive on the 2604 * nfsnode. There is the potential for another process on a different client 2605 * to create the same funny name between the nfs_lookitup() fails and the 2606 * nfs_rename() completes, but... 2607 */ 2608 int 2609 nfs_sillyrename(dvp, vp, cnp) 2610 struct vnode *dvp, *vp; 2611 struct componentname *cnp; 2612 { 2613 struct sillyrename *sp; 2614 struct nfsnode *np; 2615 int error; 2616 short pid; 2617 2618 cache_purge(dvp); 2619 np = VTONFS(vp); 2620 #ifndef DIAGNOSTIC 2621 if (vp->v_type == VDIR) 2622 panic("nfs: sillyrename dir"); 2623 #endif 2624 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename), 2625 M_NFSREQ, M_WAITOK); 2626 sp->s_cred = crdup(cnp->cn_cred); 2627 sp->s_dvp = dvp; 2628 VREF(dvp); 2629 2630 /* Fudge together a funny name */ 2631 pid = cnp->cn_proc->p_pid; 2632 memcpy(sp->s_name, ".nfsAxxxx4.4", 13); 2633 sp->s_namlen = 12; 2634 sp->s_name[8] = hextoasc[pid & 0xf]; 2635 sp->s_name[7] = hextoasc[(pid >> 4) & 0xf]; 2636 sp->s_name[6] = hextoasc[(pid >> 8) & 0xf]; 2637 sp->s_name[5] = hextoasc[(pid >> 12) & 0xf]; 2638 2639 /* Try lookitups until we get one that isn't there */ 2640 while (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2641 cnp->cn_proc, (struct nfsnode **)0) == 0) { 2642 sp->s_name[4]++; 2643 if (sp->s_name[4] > 'z') { 2644 error = EINVAL; 2645 goto bad; 2646 } 2647 } 2648 error = nfs_renameit(dvp, cnp, sp); 2649 if (error) 2650 goto bad; 2651 error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2652 cnp->cn_proc, &np); 2653 np->n_sillyrename = sp; 2654 return (0); 2655 bad: 2656 vrele(sp->s_dvp); 2657 crfree(sp->s_cred); 2658 free((caddr_t)sp, M_NFSREQ); 2659 return (error); 2660 } 2661 2662 /* 2663 * Look up a file name and optionally either update the file handle or 2664 * allocate an nfsnode, depending on the value of npp. 2665 * npp == NULL --> just do the lookup 2666 * *npp == NULL --> allocate a new nfsnode and make sure attributes are 2667 * handled too 2668 * *npp != NULL --> update the file handle in the vnode 2669 */ 2670 int 2671 nfs_lookitup(dvp, name, len, cred, procp, npp) 2672 struct vnode *dvp; 2673 const char *name; 2674 int len; 2675 struct ucred *cred; 2676 struct proc *procp; 2677 struct nfsnode **npp; 2678 { 2679 u_int32_t *tl; 2680 caddr_t cp; 2681 int32_t t1, t2; 2682 struct vnode *newvp = (struct vnode *)0; 2683 struct nfsnode *np, *dnp = VTONFS(dvp); 2684 caddr_t bpos, dpos, cp2; 2685 int error = 0, fhlen, attrflag; 2686 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2687 nfsfh_t *nfhp; 2688 const int v3 = NFS_ISV3(dvp); 2689 2690 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 2691 nfsm_reqhead(dvp, NFSPROC_LOOKUP, 2692 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 2693 nfsm_fhtom(dvp, v3); 2694 nfsm_strtom(name, len, NFS_MAXNAMLEN); 2695 nfsm_request(dvp, NFSPROC_LOOKUP, procp, cred); 2696 if (npp && !error) { 2697 nfsm_getfh(nfhp, fhlen, v3); 2698 if (*npp) { 2699 np = *npp; 2700 if (np->n_fhsize > NFS_SMALLFH && fhlen <= NFS_SMALLFH) { 2701 free((caddr_t)np->n_fhp, M_NFSBIGFH); 2702 np->n_fhp = &np->n_fh; 2703 } else if (np->n_fhsize <= NFS_SMALLFH && fhlen>NFS_SMALLFH) 2704 np->n_fhp =(nfsfh_t *)malloc(fhlen,M_NFSBIGFH,M_WAITOK); 2705 memcpy((caddr_t)np->n_fhp, (caddr_t)nfhp, fhlen); 2706 np->n_fhsize = fhlen; 2707 newvp = NFSTOV(np); 2708 } else if (NFS_CMPFH(dnp, nfhp, fhlen)) { 2709 VREF(dvp); 2710 newvp = dvp; 2711 } else { 2712 error = nfs_nget(dvp->v_mount, nfhp, fhlen, &np); 2713 if (error) { 2714 m_freem(mrep); 2715 return (error); 2716 } 2717 newvp = NFSTOV(np); 2718 } 2719 if (v3) { 2720 nfsm_postop_attr(newvp, attrflag); 2721 if (!attrflag && *npp == NULL) { 2722 m_freem(mrep); 2723 vput(newvp); 2724 return (ENOENT); 2725 } 2726 } else 2727 nfsm_loadattr(newvp, (struct vattr *)0); 2728 } 2729 nfsm_reqdone; 2730 if (npp && *npp == NULL) { 2731 if (error) { 2732 if (newvp) 2733 vput(newvp); 2734 } else 2735 *npp = np; 2736 } 2737 return (error); 2738 } 2739 2740 /* 2741 * Nfs Version 3 commit rpc 2742 */ 2743 int 2744 nfs_commit(vp, offset, cnt, procp) 2745 struct vnode *vp; 2746 off_t offset; 2747 uint32_t cnt; 2748 struct proc *procp; 2749 { 2750 caddr_t cp; 2751 u_int32_t *tl; 2752 int32_t t1, t2; 2753 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2754 caddr_t bpos, dpos, cp2; 2755 int error = 0, wccflag = NFSV3_WCCRATTR; 2756 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2757 2758 #ifdef fvdl_debug 2759 printf("commit %lu - %lu\n", (unsigned long)offset, 2760 (unsigned long)(offset + cnt)); 2761 #endif 2762 2763 if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0) 2764 return (0); 2765 nfsstats.rpccnt[NFSPROC_COMMIT]++; 2766 nfsm_reqhead(vp, NFSPROC_COMMIT, NFSX_FH(1)); 2767 nfsm_fhtom(vp, 1); 2768 nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2769 txdr_hyper(offset, tl); 2770 tl += 2; 2771 *tl = txdr_unsigned(cnt); 2772 nfsm_request(vp, NFSPROC_COMMIT, procp, VTONFS(vp)->n_wcred); 2773 nfsm_wcc_data(vp, wccflag); 2774 if (!error) { 2775 nfsm_dissect(tl, u_int32_t *, NFSX_V3WRITEVERF); 2776 if (memcmp((caddr_t)nmp->nm_verf, (caddr_t)tl, 2777 NFSX_V3WRITEVERF)) { 2778 memcpy((caddr_t)nmp->nm_verf, (caddr_t)tl, 2779 NFSX_V3WRITEVERF); 2780 error = NFSERR_STALEWRITEVERF; 2781 } 2782 } 2783 nfsm_reqdone; 2784 return (error); 2785 } 2786 2787 /* 2788 * Kludge City.. 2789 * - make nfs_bmap() essentially a no-op that does no translation 2790 * - do nfs_strategy() by doing I/O with nfs_readrpc/nfs_writerpc 2791 * (Maybe I could use the process's page mapping, but I was concerned that 2792 * Kernel Write might not be enabled and also figured copyout() would do 2793 * a lot more work than memcpy() and also it currently happens in the 2794 * context of the swapper process (2). 2795 */ 2796 int 2797 nfs_bmap(v) 2798 void *v; 2799 { 2800 struct vop_bmap_args /* { 2801 struct vnode *a_vp; 2802 daddr_t a_bn; 2803 struct vnode **a_vpp; 2804 daddr_t *a_bnp; 2805 int *a_runp; 2806 } */ *ap = v; 2807 struct vnode *vp = ap->a_vp; 2808 int bshift = vp->v_mount->mnt_fs_bshift - vp->v_mount->mnt_dev_bshift; 2809 2810 if (ap->a_vpp != NULL) 2811 *ap->a_vpp = vp; 2812 if (ap->a_bnp != NULL) 2813 *ap->a_bnp = ap->a_bn << bshift; 2814 if (ap->a_runp != NULL) 2815 *ap->a_runp = 1024 * 1024; /* XXX */ 2816 return (0); 2817 } 2818 2819 /* 2820 * Strategy routine. 2821 * For async requests when nfsiod(s) are running, queue the request by 2822 * calling nfs_asyncio(), otherwise just all nfs_doio() to do the 2823 * request. 2824 */ 2825 int 2826 nfs_strategy(v) 2827 void *v; 2828 { 2829 struct vop_strategy_args *ap = v; 2830 struct buf *bp = ap->a_bp; 2831 struct proc *p; 2832 int error = 0; 2833 2834 if ((bp->b_flags & (B_PHYS|B_ASYNC)) == (B_PHYS|B_ASYNC)) 2835 panic("nfs physio/async"); 2836 if (bp->b_flags & B_ASYNC) 2837 p = NULL; 2838 else 2839 p = curproc; /* XXX */ 2840 2841 /* 2842 * If the op is asynchronous and an i/o daemon is waiting 2843 * queue the request, wake it up and wait for completion 2844 * otherwise just do it ourselves. 2845 */ 2846 2847 if ((bp->b_flags & B_ASYNC) == 0 || 2848 nfs_asyncio(bp)) 2849 error = nfs_doio(bp, p); 2850 return (error); 2851 } 2852 2853 /* 2854 * fsync vnode op. Just call nfs_flush() with commit == 1. 2855 */ 2856 /* ARGSUSED */ 2857 int 2858 nfs_fsync(v) 2859 void *v; 2860 { 2861 struct vop_fsync_args /* { 2862 struct vnodeop_desc *a_desc; 2863 struct vnode * a_vp; 2864 struct ucred * a_cred; 2865 int a_flags; 2866 off_t offlo; 2867 off_t offhi; 2868 struct proc * a_p; 2869 } */ *ap = v; 2870 2871 return (nfs_flush(ap->a_vp, ap->a_cred, 2872 (ap->a_flags & FSYNC_WAIT) != 0 ? MNT_WAIT : 0, ap->a_p, 1)); 2873 } 2874 2875 /* 2876 * Flush all the data associated with a vnode. 2877 */ 2878 int 2879 nfs_flush(vp, cred, waitfor, p, commit) 2880 struct vnode *vp; 2881 struct ucred *cred; 2882 int waitfor; 2883 struct proc *p; 2884 int commit; 2885 { 2886 struct nfsnode *np = VTONFS(vp); 2887 int error; 2888 int flushflags = PGO_ALLPAGES|PGO_CLEANIT|PGO_SYNCIO; 2889 UVMHIST_FUNC("nfs_flush"); UVMHIST_CALLED(ubchist); 2890 2891 simple_lock(&vp->v_interlock); 2892 error = VOP_PUTPAGES(vp, 0, 0, flushflags); 2893 if (np->n_flag & NWRITEERR) { 2894 error = np->n_error; 2895 np->n_flag &= ~NWRITEERR; 2896 } 2897 UVMHIST_LOG(ubchist, "returning %d", error,0,0,0); 2898 return (error); 2899 } 2900 2901 /* 2902 * Return POSIX pathconf information applicable to nfs. 2903 * 2904 * N.B. The NFS V2 protocol doesn't support this RPC. 2905 */ 2906 /* ARGSUSED */ 2907 int 2908 nfs_pathconf(v) 2909 void *v; 2910 { 2911 struct vop_pathconf_args /* { 2912 struct vnode *a_vp; 2913 int a_name; 2914 register_t *a_retval; 2915 } */ *ap = v; 2916 struct nfsv3_pathconf *pcp; 2917 struct vnode *vp = ap->a_vp; 2918 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2919 int32_t t1, t2; 2920 u_int32_t *tl; 2921 caddr_t bpos, dpos, cp, cp2; 2922 int error = 0, attrflag; 2923 #ifndef NFS_V2_ONLY 2924 struct nfsmount *nmp; 2925 unsigned int l; 2926 u_int64_t maxsize; 2927 #endif 2928 const int v3 = NFS_ISV3(vp); 2929 2930 switch (ap->a_name) { 2931 /* Names that can be resolved locally. */ 2932 case _PC_PIPE_BUF: 2933 *ap->a_retval = PIPE_BUF; 2934 break; 2935 case _PC_SYNC_IO: 2936 *ap->a_retval = 1; 2937 break; 2938 /* Names that cannot be resolved locally; do an RPC, if possible. */ 2939 case _PC_LINK_MAX: 2940 case _PC_NAME_MAX: 2941 case _PC_CHOWN_RESTRICTED: 2942 case _PC_NO_TRUNC: 2943 if (!v3) { 2944 error = EINVAL; 2945 break; 2946 } 2947 nfsstats.rpccnt[NFSPROC_PATHCONF]++; 2948 nfsm_reqhead(vp, NFSPROC_PATHCONF, NFSX_FH(1)); 2949 nfsm_fhtom(vp, 1); 2950 nfsm_request(vp, NFSPROC_PATHCONF, 2951 curproc, curproc->p_ucred); /* XXX */ 2952 nfsm_postop_attr(vp, attrflag); 2953 if (!error) { 2954 nfsm_dissect(pcp, struct nfsv3_pathconf *, 2955 NFSX_V3PATHCONF); 2956 switch (ap->a_name) { 2957 case _PC_LINK_MAX: 2958 *ap->a_retval = 2959 fxdr_unsigned(register_t, pcp->pc_linkmax); 2960 break; 2961 case _PC_NAME_MAX: 2962 *ap->a_retval = 2963 fxdr_unsigned(register_t, pcp->pc_namemax); 2964 break; 2965 case _PC_CHOWN_RESTRICTED: 2966 *ap->a_retval = 2967 (pcp->pc_chownrestricted == nfs_true); 2968 break; 2969 case _PC_NO_TRUNC: 2970 *ap->a_retval = 2971 (pcp->pc_notrunc == nfs_true); 2972 break; 2973 } 2974 } 2975 nfsm_reqdone; 2976 break; 2977 case _PC_FILESIZEBITS: 2978 #ifndef NFS_V2_ONLY 2979 if (v3) { 2980 nmp = VFSTONFS(vp->v_mount); 2981 if ((nmp->nm_iflag & NFSMNT_GOTFSINFO) == 0) 2982 if ((error = nfs_fsinfo(nmp, vp, 2983 curproc->p_ucred, curproc)) != 0) /* XXX */ 2984 break; 2985 for (l = 0, maxsize = nmp->nm_maxfilesize; 2986 (maxsize >> l) > 0; l++) 2987 ; 2988 *ap->a_retval = l + 1; 2989 } else 2990 #endif 2991 { 2992 *ap->a_retval = 32; /* NFS V2 limitation */ 2993 } 2994 break; 2995 default: 2996 error = EINVAL; 2997 break; 2998 } 2999 3000 return (error); 3001 } 3002 3003 /* 3004 * NFS advisory byte-level locks. 3005 */ 3006 int 3007 nfs_advlock(v) 3008 void *v; 3009 { 3010 struct vop_advlock_args /* { 3011 struct vnode *a_vp; 3012 caddr_t a_id; 3013 int a_op; 3014 struct flock *a_fl; 3015 int a_flags; 3016 } */ *ap = v; 3017 struct nfsnode *np = VTONFS(ap->a_vp); 3018 3019 return lf_advlock(ap, &np->n_lockf, np->n_size); 3020 } 3021 3022 /* 3023 * Print out the contents of an nfsnode. 3024 */ 3025 int 3026 nfs_print(v) 3027 void *v; 3028 { 3029 struct vop_print_args /* { 3030 struct vnode *a_vp; 3031 } */ *ap = v; 3032 struct vnode *vp = ap->a_vp; 3033 struct nfsnode *np = VTONFS(vp); 3034 3035 printf("tag VT_NFS, fileid %ld fsid 0x%lx", 3036 np->n_vattr->va_fileid, np->n_vattr->va_fsid); 3037 if (vp->v_type == VFIFO) 3038 fifo_printinfo(vp); 3039 printf("\n"); 3040 return (0); 3041 } 3042 3043 /* 3044 * NFS file truncation. 3045 */ 3046 int 3047 nfs_truncate(v) 3048 void *v; 3049 { 3050 #if 0 3051 struct vop_truncate_args /* { 3052 struct vnode *a_vp; 3053 off_t a_length; 3054 int a_flags; 3055 struct ucred *a_cred; 3056 struct proc *a_p; 3057 } */ *ap = v; 3058 #endif 3059 3060 /* Use nfs_setattr */ 3061 return (EOPNOTSUPP); 3062 } 3063 3064 /* 3065 * NFS update. 3066 */ 3067 int 3068 nfs_update(v) 3069 void *v; 3070 #if 0 3071 struct vop_update_args /* { 3072 struct vnode *a_vp; 3073 struct timespec *a_ta; 3074 struct timespec *a_tm; 3075 int a_waitfor; 3076 } */ *ap = v; 3077 #endif 3078 { 3079 3080 /* Use nfs_setattr */ 3081 return (EOPNOTSUPP); 3082 } 3083 3084 /* 3085 * Just call bwrite(). 3086 */ 3087 int 3088 nfs_bwrite(v) 3089 void *v; 3090 { 3091 struct vop_bwrite_args /* { 3092 struct vnode *a_bp; 3093 } */ *ap = v; 3094 3095 return (bwrite(ap->a_bp)); 3096 } 3097 3098 /* 3099 * nfs special file access vnode op. 3100 * Essentially just get vattr and then imitate iaccess() since the device is 3101 * local to the client. 3102 */ 3103 int 3104 nfsspec_access(v) 3105 void *v; 3106 { 3107 struct vop_access_args /* { 3108 struct vnode *a_vp; 3109 int a_mode; 3110 struct ucred *a_cred; 3111 struct proc *a_p; 3112 } */ *ap = v; 3113 struct vattr va; 3114 struct vnode *vp = ap->a_vp; 3115 int error; 3116 3117 error = VOP_GETATTR(vp, &va, ap->a_cred, ap->a_p); 3118 if (error) 3119 return (error); 3120 3121 /* 3122 * Disallow write attempts on filesystems mounted read-only; 3123 * unless the file is a socket, fifo, or a block or character 3124 * device resident on the filesystem. 3125 */ 3126 if ((ap->a_mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) { 3127 switch (vp->v_type) { 3128 case VREG: 3129 case VDIR: 3130 case VLNK: 3131 return (EROFS); 3132 default: 3133 break; 3134 } 3135 } 3136 3137 return (vaccess(va.va_type, va.va_mode, 3138 va.va_uid, va.va_gid, ap->a_mode, ap->a_cred)); 3139 } 3140 3141 /* 3142 * Read wrapper for special devices. 3143 */ 3144 int 3145 nfsspec_read(v) 3146 void *v; 3147 { 3148 struct vop_read_args /* { 3149 struct vnode *a_vp; 3150 struct uio *a_uio; 3151 int a_ioflag; 3152 struct ucred *a_cred; 3153 } */ *ap = v; 3154 struct nfsnode *np = VTONFS(ap->a_vp); 3155 3156 /* 3157 * Set access flag. 3158 */ 3159 np->n_flag |= NACC; 3160 np->n_atim.tv_sec = time.tv_sec; 3161 np->n_atim.tv_nsec = time.tv_usec * 1000; 3162 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_read), ap)); 3163 } 3164 3165 /* 3166 * Write wrapper for special devices. 3167 */ 3168 int 3169 nfsspec_write(v) 3170 void *v; 3171 { 3172 struct vop_write_args /* { 3173 struct vnode *a_vp; 3174 struct uio *a_uio; 3175 int a_ioflag; 3176 struct ucred *a_cred; 3177 } */ *ap = v; 3178 struct nfsnode *np = VTONFS(ap->a_vp); 3179 3180 /* 3181 * Set update flag. 3182 */ 3183 np->n_flag |= NUPD; 3184 np->n_mtim.tv_sec = time.tv_sec; 3185 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3186 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_write), ap)); 3187 } 3188 3189 /* 3190 * Close wrapper for special devices. 3191 * 3192 * Update the times on the nfsnode then do device close. 3193 */ 3194 int 3195 nfsspec_close(v) 3196 void *v; 3197 { 3198 struct vop_close_args /* { 3199 struct vnode *a_vp; 3200 int a_fflag; 3201 struct ucred *a_cred; 3202 struct proc *a_p; 3203 } */ *ap = v; 3204 struct vnode *vp = ap->a_vp; 3205 struct nfsnode *np = VTONFS(vp); 3206 struct vattr vattr; 3207 3208 if (np->n_flag & (NACC | NUPD)) { 3209 np->n_flag |= NCHG; 3210 if (vp->v_usecount == 1 && 3211 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3212 VATTR_NULL(&vattr); 3213 if (np->n_flag & NACC) 3214 vattr.va_atime = np->n_atim; 3215 if (np->n_flag & NUPD) 3216 vattr.va_mtime = np->n_mtim; 3217 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p); 3218 } 3219 } 3220 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_close), ap)); 3221 } 3222 3223 /* 3224 * Read wrapper for fifos. 3225 */ 3226 int 3227 nfsfifo_read(v) 3228 void *v; 3229 { 3230 struct vop_read_args /* { 3231 struct vnode *a_vp; 3232 struct uio *a_uio; 3233 int a_ioflag; 3234 struct ucred *a_cred; 3235 } */ *ap = v; 3236 struct nfsnode *np = VTONFS(ap->a_vp); 3237 3238 /* 3239 * Set access flag. 3240 */ 3241 np->n_flag |= NACC; 3242 np->n_atim.tv_sec = time.tv_sec; 3243 np->n_atim.tv_nsec = time.tv_usec * 1000; 3244 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), ap)); 3245 } 3246 3247 /* 3248 * Write wrapper for fifos. 3249 */ 3250 int 3251 nfsfifo_write(v) 3252 void *v; 3253 { 3254 struct vop_write_args /* { 3255 struct vnode *a_vp; 3256 struct uio *a_uio; 3257 int a_ioflag; 3258 struct ucred *a_cred; 3259 } */ *ap = v; 3260 struct nfsnode *np = VTONFS(ap->a_vp); 3261 3262 /* 3263 * Set update flag. 3264 */ 3265 np->n_flag |= NUPD; 3266 np->n_mtim.tv_sec = time.tv_sec; 3267 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3268 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), ap)); 3269 } 3270 3271 /* 3272 * Close wrapper for fifos. 3273 * 3274 * Update the times on the nfsnode then do fifo close. 3275 */ 3276 int 3277 nfsfifo_close(v) 3278 void *v; 3279 { 3280 struct vop_close_args /* { 3281 struct vnode *a_vp; 3282 int a_fflag; 3283 struct ucred *a_cred; 3284 struct proc *a_p; 3285 } */ *ap = v; 3286 struct vnode *vp = ap->a_vp; 3287 struct nfsnode *np = VTONFS(vp); 3288 struct vattr vattr; 3289 3290 if (np->n_flag & (NACC | NUPD)) { 3291 if (np->n_flag & NACC) { 3292 np->n_atim.tv_sec = time.tv_sec; 3293 np->n_atim.tv_nsec = time.tv_usec * 1000; 3294 } 3295 if (np->n_flag & NUPD) { 3296 np->n_mtim.tv_sec = time.tv_sec; 3297 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3298 } 3299 np->n_flag |= NCHG; 3300 if (vp->v_usecount == 1 && 3301 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3302 VATTR_NULL(&vattr); 3303 if (np->n_flag & NACC) 3304 vattr.va_atime = np->n_atim; 3305 if (np->n_flag & NUPD) 3306 vattr.va_mtime = np->n_mtim; 3307 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p); 3308 } 3309 } 3310 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_close), ap)); 3311 } 3312