nfs_vnops.c revision 1.165
1 /* $NetBSD: nfs_vnops.c,v 1.165 2003/04/24 21:21:06 drochner 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 1.165 2003/04/24 21:21:06 drochner 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_kqfilter_desc, nfs_kqfilter }, /* kqfilter */ 116 { &vop_revoke_desc, nfs_revoke }, /* revoke */ 117 { &vop_mmap_desc, nfs_mmap }, /* mmap */ 118 { &vop_fsync_desc, nfs_fsync }, /* fsync */ 119 { &vop_seek_desc, nfs_seek }, /* seek */ 120 { &vop_remove_desc, nfs_remove }, /* remove */ 121 { &vop_link_desc, nfs_link }, /* link */ 122 { &vop_rename_desc, nfs_rename }, /* rename */ 123 { &vop_mkdir_desc, nfs_mkdir }, /* mkdir */ 124 { &vop_rmdir_desc, nfs_rmdir }, /* rmdir */ 125 { &vop_symlink_desc, nfs_symlink }, /* symlink */ 126 { &vop_readdir_desc, nfs_readdir }, /* readdir */ 127 { &vop_readlink_desc, nfs_readlink }, /* readlink */ 128 { &vop_abortop_desc, nfs_abortop }, /* abortop */ 129 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 130 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 131 { &vop_lock_desc, nfs_lock }, /* lock */ 132 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 133 { &vop_bmap_desc, nfs_bmap }, /* bmap */ 134 { &vop_strategy_desc, nfs_strategy }, /* strategy */ 135 { &vop_print_desc, nfs_print }, /* print */ 136 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 137 { &vop_pathconf_desc, nfs_pathconf }, /* pathconf */ 138 { &vop_advlock_desc, nfs_advlock }, /* advlock */ 139 { &vop_blkatoff_desc, nfs_blkatoff }, /* blkatoff */ 140 { &vop_valloc_desc, nfs_valloc }, /* valloc */ 141 { &vop_reallocblks_desc, nfs_reallocblks }, /* reallocblks */ 142 { &vop_vfree_desc, nfs_vfree }, /* vfree */ 143 { &vop_truncate_desc, nfs_truncate }, /* truncate */ 144 { &vop_update_desc, nfs_update }, /* update */ 145 { &vop_bwrite_desc, nfs_bwrite }, /* bwrite */ 146 { &vop_getpages_desc, nfs_getpages }, /* getpages */ 147 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 148 { NULL, NULL } 149 }; 150 const struct vnodeopv_desc nfsv2_vnodeop_opv_desc = 151 { &nfsv2_vnodeop_p, nfsv2_vnodeop_entries }; 152 153 /* 154 * Special device vnode ops 155 */ 156 int (**spec_nfsv2nodeop_p) __P((void *)); 157 const struct vnodeopv_entry_desc spec_nfsv2nodeop_entries[] = { 158 { &vop_default_desc, vn_default_error }, 159 { &vop_lookup_desc, spec_lookup }, /* lookup */ 160 { &vop_create_desc, spec_create }, /* create */ 161 { &vop_mknod_desc, spec_mknod }, /* mknod */ 162 { &vop_open_desc, spec_open }, /* open */ 163 { &vop_close_desc, nfsspec_close }, /* close */ 164 { &vop_access_desc, nfsspec_access }, /* access */ 165 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 166 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 167 { &vop_read_desc, nfsspec_read }, /* read */ 168 { &vop_write_desc, nfsspec_write }, /* write */ 169 { &vop_lease_desc, spec_lease_check }, /* lease */ 170 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 171 { &vop_ioctl_desc, spec_ioctl }, /* ioctl */ 172 { &vop_poll_desc, spec_poll }, /* poll */ 173 { &vop_kqfilter_desc, spec_kqfilter }, /* kqfilter */ 174 { &vop_revoke_desc, spec_revoke }, /* revoke */ 175 { &vop_mmap_desc, spec_mmap }, /* mmap */ 176 { &vop_fsync_desc, spec_fsync }, /* fsync */ 177 { &vop_seek_desc, spec_seek }, /* seek */ 178 { &vop_remove_desc, spec_remove }, /* remove */ 179 { &vop_link_desc, spec_link }, /* link */ 180 { &vop_rename_desc, spec_rename }, /* rename */ 181 { &vop_mkdir_desc, spec_mkdir }, /* mkdir */ 182 { &vop_rmdir_desc, spec_rmdir }, /* rmdir */ 183 { &vop_symlink_desc, spec_symlink }, /* symlink */ 184 { &vop_readdir_desc, spec_readdir }, /* readdir */ 185 { &vop_readlink_desc, spec_readlink }, /* readlink */ 186 { &vop_abortop_desc, spec_abortop }, /* abortop */ 187 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 188 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 189 { &vop_lock_desc, nfs_lock }, /* lock */ 190 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 191 { &vop_bmap_desc, spec_bmap }, /* bmap */ 192 { &vop_strategy_desc, spec_strategy }, /* strategy */ 193 { &vop_print_desc, nfs_print }, /* print */ 194 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 195 { &vop_pathconf_desc, spec_pathconf }, /* pathconf */ 196 { &vop_advlock_desc, spec_advlock }, /* advlock */ 197 { &vop_blkatoff_desc, spec_blkatoff }, /* blkatoff */ 198 { &vop_valloc_desc, spec_valloc }, /* valloc */ 199 { &vop_reallocblks_desc, spec_reallocblks }, /* reallocblks */ 200 { &vop_vfree_desc, spec_vfree }, /* vfree */ 201 { &vop_truncate_desc, spec_truncate }, /* truncate */ 202 { &vop_update_desc, nfs_update }, /* update */ 203 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 204 { &vop_getpages_desc, spec_getpages }, /* getpages */ 205 { &vop_putpages_desc, spec_putpages }, /* putpages */ 206 { NULL, NULL } 207 }; 208 const struct vnodeopv_desc spec_nfsv2nodeop_opv_desc = 209 { &spec_nfsv2nodeop_p, spec_nfsv2nodeop_entries }; 210 211 int (**fifo_nfsv2nodeop_p) __P((void *)); 212 const struct vnodeopv_entry_desc fifo_nfsv2nodeop_entries[] = { 213 { &vop_default_desc, vn_default_error }, 214 { &vop_lookup_desc, fifo_lookup }, /* lookup */ 215 { &vop_create_desc, fifo_create }, /* create */ 216 { &vop_mknod_desc, fifo_mknod }, /* mknod */ 217 { &vop_open_desc, fifo_open }, /* open */ 218 { &vop_close_desc, nfsfifo_close }, /* close */ 219 { &vop_access_desc, nfsspec_access }, /* access */ 220 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 221 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 222 { &vop_read_desc, nfsfifo_read }, /* read */ 223 { &vop_write_desc, nfsfifo_write }, /* write */ 224 { &vop_lease_desc, fifo_lease_check }, /* lease */ 225 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 226 { &vop_ioctl_desc, fifo_ioctl }, /* ioctl */ 227 { &vop_poll_desc, fifo_poll }, /* poll */ 228 { &vop_kqfilter_desc, fifo_kqfilter }, /* kqfilter */ 229 { &vop_revoke_desc, fifo_revoke }, /* revoke */ 230 { &vop_mmap_desc, fifo_mmap }, /* mmap */ 231 { &vop_fsync_desc, nfs_fsync }, /* fsync */ 232 { &vop_seek_desc, fifo_seek }, /* seek */ 233 { &vop_remove_desc, fifo_remove }, /* remove */ 234 { &vop_link_desc, fifo_link }, /* link */ 235 { &vop_rename_desc, fifo_rename }, /* rename */ 236 { &vop_mkdir_desc, fifo_mkdir }, /* mkdir */ 237 { &vop_rmdir_desc, fifo_rmdir }, /* rmdir */ 238 { &vop_symlink_desc, fifo_symlink }, /* symlink */ 239 { &vop_readdir_desc, fifo_readdir }, /* readdir */ 240 { &vop_readlink_desc, fifo_readlink }, /* readlink */ 241 { &vop_abortop_desc, fifo_abortop }, /* abortop */ 242 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 243 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 244 { &vop_lock_desc, nfs_lock }, /* lock */ 245 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 246 { &vop_bmap_desc, fifo_bmap }, /* bmap */ 247 { &vop_strategy_desc, genfs_badop }, /* strategy */ 248 { &vop_print_desc, nfs_print }, /* print */ 249 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 250 { &vop_pathconf_desc, fifo_pathconf }, /* pathconf */ 251 { &vop_advlock_desc, fifo_advlock }, /* advlock */ 252 { &vop_blkatoff_desc, fifo_blkatoff }, /* blkatoff */ 253 { &vop_valloc_desc, fifo_valloc }, /* valloc */ 254 { &vop_reallocblks_desc, fifo_reallocblks }, /* reallocblks */ 255 { &vop_vfree_desc, fifo_vfree }, /* vfree */ 256 { &vop_truncate_desc, fifo_truncate }, /* truncate */ 257 { &vop_update_desc, nfs_update }, /* update */ 258 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 259 { &vop_putpages_desc, fifo_putpages }, /* putpages */ 260 { NULL, NULL } 261 }; 262 const struct vnodeopv_desc fifo_nfsv2nodeop_opv_desc = 263 { &fifo_nfsv2nodeop_p, fifo_nfsv2nodeop_entries }; 264 265 /* 266 * Global variables 267 */ 268 extern u_int32_t nfs_true, nfs_false; 269 extern u_int32_t nfs_xdrneg1; 270 extern const nfstype nfsv3_type[9]; 271 272 int nfs_numasync = 0; 273 #define DIRHDSIZ (sizeof (struct dirent) - (MAXNAMLEN + 1)) 274 275 /* 276 * nfs null call from vfs. 277 */ 278 int 279 nfs_null(vp, cred, procp) 280 struct vnode *vp; 281 struct ucred *cred; 282 struct proc *procp; 283 { 284 caddr_t bpos, dpos; 285 int error = 0; 286 struct mbuf *mreq, *mrep, *md, *mb; 287 struct nfsnode *np = VTONFS(vp); 288 289 nfsm_reqhead(np, NFSPROC_NULL, 0); 290 nfsm_request(np, NFSPROC_NULL, procp, cred); 291 nfsm_reqdone; 292 return (error); 293 } 294 295 /* 296 * nfs access vnode op. 297 * For nfs version 2, just return ok. File accesses may fail later. 298 * For nfs version 3, use the access rpc to check accessibility. If file modes 299 * are changed on the server, accesses might still fail later. 300 */ 301 int 302 nfs_access(v) 303 void *v; 304 { 305 struct vop_access_args /* { 306 struct vnode *a_vp; 307 int a_mode; 308 struct ucred *a_cred; 309 struct proc *a_p; 310 } */ *ap = v; 311 struct vnode *vp = ap->a_vp; 312 u_int32_t *tl; 313 caddr_t cp; 314 int32_t t1, t2; 315 caddr_t bpos, dpos, cp2; 316 int error = 0, attrflag, cachevalid; 317 struct mbuf *mreq, *mrep, *md, *mb; 318 u_int32_t mode, rmode; 319 const int v3 = NFS_ISV3(vp); 320 struct nfsnode *np = VTONFS(vp); 321 322 cachevalid = (np->n_accstamp != -1 && 323 (time.tv_sec - np->n_accstamp) < NFS_ATTRTIMEO(np) && 324 np->n_accuid == ap->a_cred->cr_uid); 325 326 /* 327 * Check access cache first. If this request has been made for this 328 * uid shortly before, use the cached result. 329 */ 330 if (cachevalid) { 331 if (!np->n_accerror) { 332 if ((np->n_accmode & ap->a_mode) == ap->a_mode) 333 return np->n_accerror; 334 } else if ((np->n_accmode & ap->a_mode) == np->n_accmode) 335 return np->n_accerror; 336 } 337 338 /* 339 * For nfs v3, do an access rpc, otherwise you are stuck emulating 340 * ufs_access() locally using the vattr. This may not be correct, 341 * since the server may apply other access criteria such as 342 * client uid-->server uid mapping that we do not know about, but 343 * this is better than just returning anything that is lying about 344 * in the cache. 345 */ 346 if (v3) { 347 nfsstats.rpccnt[NFSPROC_ACCESS]++; 348 nfsm_reqhead(np, NFSPROC_ACCESS, NFSX_FH(v3) + NFSX_UNSIGNED); 349 nfsm_fhtom(np, v3); 350 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 351 if (ap->a_mode & VREAD) 352 mode = NFSV3ACCESS_READ; 353 else 354 mode = 0; 355 if (vp->v_type != VDIR) { 356 if (ap->a_mode & VWRITE) 357 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND); 358 if (ap->a_mode & VEXEC) 359 mode |= NFSV3ACCESS_EXECUTE; 360 } else { 361 if (ap->a_mode & VWRITE) 362 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | 363 NFSV3ACCESS_DELETE); 364 if (ap->a_mode & VEXEC) 365 mode |= NFSV3ACCESS_LOOKUP; 366 } 367 *tl = txdr_unsigned(mode); 368 nfsm_request(np, NFSPROC_ACCESS, ap->a_p, ap->a_cred); 369 nfsm_postop_attr(vp, attrflag, 0); 370 if (!error) { 371 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 372 rmode = fxdr_unsigned(u_int32_t, *tl); 373 /* 374 * The NFS V3 spec does not clarify whether or not 375 * the returned access bits can be a superset of 376 * the ones requested, so... 377 */ 378 if ((rmode & mode) != mode) 379 error = EACCES; 380 } 381 nfsm_reqdone; 382 } else 383 return (nfsspec_access(ap)); 384 /* 385 * Disallow write attempts on filesystems mounted read-only; 386 * unless the file is a socket, fifo, or a block or character 387 * device resident on the filesystem. 388 */ 389 if (!error && (ap->a_mode & VWRITE) && 390 (vp->v_mount->mnt_flag & MNT_RDONLY)) { 391 switch (vp->v_type) { 392 case VREG: 393 case VDIR: 394 case VLNK: 395 error = EROFS; 396 default: 397 break; 398 } 399 } 400 401 if (!error || error == EACCES) { 402 /* 403 * If we got the same result as for a previous, 404 * different request, OR it in. Don't update 405 * the timestamp in that case. 406 */ 407 if (cachevalid && np->n_accstamp != -1 && 408 error == np->n_accerror) { 409 if (!error) 410 np->n_accmode |= ap->a_mode; 411 else if ((np->n_accmode & ap->a_mode) == ap->a_mode) 412 np->n_accmode = ap->a_mode; 413 } else { 414 np->n_accstamp = time.tv_sec; 415 np->n_accuid = ap->a_cred->cr_uid; 416 np->n_accmode = ap->a_mode; 417 np->n_accerror = error; 418 } 419 } 420 421 return (error); 422 } 423 424 /* 425 * nfs open vnode op 426 * Check to see if the type is ok 427 * and that deletion is not in progress. 428 * For paged in text files, you will need to flush the page cache 429 * if consistency is lost. 430 */ 431 /* ARGSUSED */ 432 int 433 nfs_open(v) 434 void *v; 435 { 436 struct vop_open_args /* { 437 struct vnode *a_vp; 438 int a_mode; 439 struct ucred *a_cred; 440 struct proc *a_p; 441 } */ *ap = v; 442 struct vnode *vp = ap->a_vp; 443 struct nfsnode *np = VTONFS(vp); 444 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 445 struct vattr vattr; 446 int error; 447 448 if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK) { 449 return (EACCES); 450 } 451 452 /* 453 * Initialize read and write creds here, for swapfiles 454 * and other paths that don't set the creds themselves. 455 */ 456 457 if (ap->a_mode & FREAD) { 458 if (np->n_rcred) { 459 crfree(np->n_rcred); 460 } 461 np->n_rcred = ap->a_cred; 462 crhold(np->n_rcred); 463 } 464 if (ap->a_mode & FWRITE) { 465 if (np->n_wcred) { 466 crfree(np->n_wcred); 467 } 468 np->n_wcred = ap->a_cred; 469 crhold(np->n_wcred); 470 } 471 472 #ifndef NFS_V2_ONLY 473 /* 474 * Get a valid lease. If cached data is stale, flush it. 475 */ 476 if (nmp->nm_flag & NFSMNT_NQNFS) { 477 if (NQNFS_CKINVALID(vp, np, ND_READ)) { 478 do { 479 error = nqnfs_getlease(vp, ND_READ, ap->a_cred, 480 ap->a_p); 481 } while (error == NQNFS_EXPIRED); 482 if (error) 483 return (error); 484 if (np->n_lrev != np->n_brev || 485 (np->n_flag & NQNFSNONCACHE)) { 486 if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 487 ap->a_p, 1)) == EINTR) 488 return (error); 489 np->n_brev = np->n_lrev; 490 } 491 } 492 } else 493 #endif 494 { 495 if (np->n_flag & NMODIFIED) { 496 if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 497 ap->a_p, 1)) == EINTR) 498 return (error); 499 np->n_attrstamp = 0; 500 if (vp->v_type == VDIR) { 501 nfs_invaldircache(vp, 0); 502 np->n_direofoffset = 0; 503 } 504 error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_p); 505 if (error) 506 return (error); 507 np->n_mtime = vattr.va_mtime.tv_sec; 508 } else { 509 error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_p); 510 if (error) 511 return (error); 512 if (np->n_mtime != vattr.va_mtime.tv_sec) { 513 if (vp->v_type == VDIR) { 514 nfs_invaldircache(vp, 0); 515 np->n_direofoffset = 0; 516 } 517 if ((error = nfs_vinvalbuf(vp, V_SAVE, 518 ap->a_cred, ap->a_p, 1)) == EINTR) 519 return (error); 520 np->n_mtime = vattr.va_mtime.tv_sec; 521 } 522 } 523 } 524 if ((nmp->nm_flag & NFSMNT_NQNFS) == 0) 525 np->n_attrstamp = 0; /* For Open/Close consistency */ 526 return (0); 527 } 528 529 /* 530 * nfs close vnode op 531 * What an NFS client should do upon close after writing is a debatable issue. 532 * Most NFS clients push delayed writes to the server upon close, basically for 533 * two reasons: 534 * 1 - So that any write errors may be reported back to the client process 535 * doing the close system call. By far the two most likely errors are 536 * NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure. 537 * 2 - To put a worst case upper bound on cache inconsistency between 538 * multiple clients for the file. 539 * There is also a consistency problem for Version 2 of the protocol w.r.t. 540 * not being able to tell if other clients are writing a file concurrently, 541 * since there is no way of knowing if the changed modify time in the reply 542 * is only due to the write for this client. 543 * (NFS Version 3 provides weak cache consistency data in the reply that 544 * should be sufficient to detect and handle this case.) 545 * 546 * The current code does the following: 547 * for NFS Version 2 - play it safe and flush/invalidate all dirty buffers 548 * for NFS Version 3 - flush dirty buffers to the server but don't invalidate 549 * or commit them (this satisfies 1 and 2 except for the 550 * case where the server crashes after this close but 551 * before the commit RPC, which is felt to be "good 552 * enough". Changing the last argument to nfs_flush() to 553 * a 1 would force a commit operation, if it is felt a 554 * commit is necessary now. 555 * for NQNFS - do nothing now, since 2 is dealt with via leases and 556 * 1 should be dealt with via an fsync() system call for 557 * cases where write errors are important. 558 */ 559 /* ARGSUSED */ 560 int 561 nfs_close(v) 562 void *v; 563 { 564 struct vop_close_args /* { 565 struct vnodeop_desc *a_desc; 566 struct vnode *a_vp; 567 int a_fflag; 568 struct ucred *a_cred; 569 struct proc *a_p; 570 } */ *ap = v; 571 struct vnode *vp = ap->a_vp; 572 struct nfsnode *np = VTONFS(vp); 573 int error = 0; 574 UVMHIST_FUNC("nfs_close"); UVMHIST_CALLED(ubchist); 575 576 if (vp->v_type == VREG) { 577 if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS) == 0 && 578 (np->n_flag & NMODIFIED)) { 579 if (NFS_ISV3(vp)) { 580 error = nfs_flush(vp, ap->a_cred, MNT_WAIT, ap->a_p, 0); 581 np->n_flag &= ~NMODIFIED; 582 } else 583 error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, ap->a_p, 1); 584 np->n_attrstamp = 0; 585 } 586 if (np->n_flag & NWRITEERR) { 587 np->n_flag &= ~NWRITEERR; 588 error = np->n_error; 589 } 590 } 591 UVMHIST_LOG(ubchist, "returning %d", error,0,0,0); 592 return (error); 593 } 594 595 /* 596 * nfs getattr call from vfs. 597 */ 598 int 599 nfs_getattr(v) 600 void *v; 601 { 602 struct vop_getattr_args /* { 603 struct vnode *a_vp; 604 struct vattr *a_vap; 605 struct ucred *a_cred; 606 struct proc *a_p; 607 } */ *ap = v; 608 struct vnode *vp = ap->a_vp; 609 struct nfsnode *np = VTONFS(vp); 610 caddr_t cp; 611 u_int32_t *tl; 612 int32_t t1, t2; 613 caddr_t bpos, dpos; 614 int error = 0; 615 struct mbuf *mreq, *mrep, *md, *mb; 616 const int v3 = NFS_ISV3(vp); 617 618 /* 619 * Update local times for special files. 620 */ 621 if (np->n_flag & (NACC | NUPD)) 622 np->n_flag |= NCHG; 623 /* 624 * First look in the cache. 625 */ 626 if (nfs_getattrcache(vp, ap->a_vap) == 0) 627 return (0); 628 nfsstats.rpccnt[NFSPROC_GETATTR]++; 629 nfsm_reqhead(np, NFSPROC_GETATTR, NFSX_FH(v3)); 630 nfsm_fhtom(np, v3); 631 nfsm_request(np, NFSPROC_GETATTR, ap->a_p, ap->a_cred); 632 if (!error) { 633 nfsm_loadattr(vp, ap->a_vap, 0); 634 if (vp->v_type == VDIR && 635 ap->a_vap->va_blocksize < NFS_DIRFRAGSIZ) 636 ap->a_vap->va_blocksize = NFS_DIRFRAGSIZ; 637 } 638 nfsm_reqdone; 639 return (error); 640 } 641 642 /* 643 * nfs setattr call. 644 */ 645 int 646 nfs_setattr(v) 647 void *v; 648 { 649 struct vop_setattr_args /* { 650 struct vnodeop_desc *a_desc; 651 struct vnode *a_vp; 652 struct vattr *a_vap; 653 struct ucred *a_cred; 654 struct proc *a_p; 655 } */ *ap = v; 656 struct vnode *vp = ap->a_vp; 657 struct nfsnode *np = VTONFS(vp); 658 struct vattr *vap = ap->a_vap; 659 int error = 0; 660 u_quad_t tsize = 0; 661 662 /* 663 * Setting of flags is not supported. 664 */ 665 if (vap->va_flags != VNOVAL) 666 return (EOPNOTSUPP); 667 668 /* 669 * Disallow write attempts if the filesystem is mounted read-only. 670 */ 671 if ((vap->va_uid != (uid_t)VNOVAL || 672 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL || 673 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) && 674 (vp->v_mount->mnt_flag & MNT_RDONLY)) 675 return (EROFS); 676 if (vap->va_size != VNOVAL) { 677 switch (vp->v_type) { 678 case VDIR: 679 return (EISDIR); 680 case VCHR: 681 case VBLK: 682 case VSOCK: 683 case VFIFO: 684 if (vap->va_mtime.tv_sec == VNOVAL && 685 vap->va_atime.tv_sec == VNOVAL && 686 vap->va_mode == (mode_t)VNOVAL && 687 vap->va_uid == (uid_t)VNOVAL && 688 vap->va_gid == (gid_t)VNOVAL) 689 return (0); 690 vap->va_size = VNOVAL; 691 break; 692 default: 693 /* 694 * Disallow write attempts if the filesystem is 695 * mounted read-only. 696 */ 697 if (vp->v_mount->mnt_flag & MNT_RDONLY) 698 return (EROFS); 699 uvm_vnp_setsize(vp, vap->va_size); 700 tsize = np->n_size; 701 np->n_size = vap->va_size; 702 if (vap->va_size == 0) 703 error = nfs_vinvalbuf(vp, 0, 704 ap->a_cred, ap->a_p, 1); 705 else 706 error = nfs_vinvalbuf(vp, V_SAVE, 707 ap->a_cred, ap->a_p, 1); 708 if (error) { 709 uvm_vnp_setsize(vp, tsize); 710 return (error); 711 } 712 np->n_vattr->va_size = vap->va_size; 713 } 714 } else if ((vap->va_mtime.tv_sec != VNOVAL || 715 vap->va_atime.tv_sec != VNOVAL) && 716 vp->v_type == VREG && 717 (error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 718 ap->a_p, 1)) == EINTR) 719 return (error); 720 error = nfs_setattrrpc(vp, vap, ap->a_cred, ap->a_p); 721 if (error && vap->va_size != VNOVAL) { 722 np->n_size = np->n_vattr->va_size = tsize; 723 uvm_vnp_setsize(vp, np->n_size); 724 } 725 VN_KNOTE(vp, NOTE_ATTRIB); 726 return (error); 727 } 728 729 /* 730 * Do an nfs setattr rpc. 731 */ 732 int 733 nfs_setattrrpc(vp, vap, cred, procp) 734 struct vnode *vp; 735 struct vattr *vap; 736 struct ucred *cred; 737 struct proc *procp; 738 { 739 struct nfsv2_sattr *sp; 740 caddr_t cp; 741 int32_t t1, t2; 742 caddr_t bpos, dpos, cp2; 743 u_int32_t *tl; 744 int error = 0, wccflag = NFSV3_WCCRATTR; 745 struct mbuf *mreq, *mrep, *md, *mb; 746 const int v3 = NFS_ISV3(vp); 747 struct nfsnode *np = VTONFS(vp); 748 749 nfsstats.rpccnt[NFSPROC_SETATTR]++; 750 nfsm_reqhead(np, NFSPROC_SETATTR, NFSX_FH(v3) + NFSX_SATTR(v3)); 751 nfsm_fhtom(np, v3); 752 if (v3) { 753 nfsm_v3attrbuild(vap, TRUE); 754 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 755 *tl = nfs_false; 756 } else { 757 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 758 if (vap->va_mode == (mode_t)VNOVAL) 759 sp->sa_mode = nfs_xdrneg1; 760 else 761 sp->sa_mode = vtonfsv2_mode(vp->v_type, vap->va_mode); 762 if (vap->va_uid == (uid_t)VNOVAL) 763 sp->sa_uid = nfs_xdrneg1; 764 else 765 sp->sa_uid = txdr_unsigned(vap->va_uid); 766 if (vap->va_gid == (gid_t)VNOVAL) 767 sp->sa_gid = nfs_xdrneg1; 768 else 769 sp->sa_gid = txdr_unsigned(vap->va_gid); 770 sp->sa_size = txdr_unsigned(vap->va_size); 771 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 772 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 773 } 774 nfsm_request(np, NFSPROC_SETATTR, procp, cred); 775 if (v3) { 776 nfsm_wcc_data(vp, wccflag, 0); 777 } else 778 nfsm_loadattr(vp, (struct vattr *)0, 0); 779 nfsm_reqdone; 780 return (error); 781 } 782 783 /* 784 * nfs lookup call, one step at a time... 785 * First look in cache 786 * If not found, unlock the directory nfsnode and do the rpc 787 * 788 * This code is full of lock/unlock statements and checks, because 789 * we continue after cache_lookup has finished (we need to check 790 * with the attr cache and do an rpc if it has timed out). This means 791 * that the locking effects of cache_lookup have to be taken into 792 * account. 793 */ 794 int 795 nfs_lookup(v) 796 void *v; 797 { 798 struct vop_lookup_args /* { 799 struct vnodeop_desc *a_desc; 800 struct vnode *a_dvp; 801 struct vnode **a_vpp; 802 struct componentname *a_cnp; 803 } */ *ap = v; 804 struct componentname *cnp = ap->a_cnp; 805 struct vnode *dvp = ap->a_dvp; 806 struct vnode **vpp = ap->a_vpp; 807 int flags; 808 struct vnode *newvp; 809 u_int32_t *tl; 810 caddr_t cp; 811 int32_t t1, t2; 812 caddr_t bpos, dpos, cp2; 813 struct mbuf *mreq, *mrep, *md, *mb; 814 long len; 815 nfsfh_t *fhp; 816 struct nfsnode *np; 817 int lockparent, wantparent, error = 0, attrflag, fhsize; 818 const int v3 = NFS_ISV3(dvp); 819 820 cnp->cn_flags &= ~PDIRUNLOCK; 821 flags = cnp->cn_flags; 822 823 *vpp = NULLVP; 824 newvp = NULLVP; 825 if ((flags & ISLASTCN) && (dvp->v_mount->mnt_flag & MNT_RDONLY) && 826 (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) 827 return (EROFS); 828 if (dvp->v_type != VDIR) 829 return (ENOTDIR); 830 831 lockparent = flags & LOCKPARENT; 832 wantparent = flags & (LOCKPARENT|WANTPARENT); 833 np = VTONFS(dvp); 834 835 /* 836 * Before tediously performing a linear scan of the directory, 837 * check the name cache to see if the directory/name pair 838 * we are looking for is known already. 839 * If the directory/name pair is found in the name cache, 840 * we have to ensure the directory has not changed from 841 * the time the cache entry has been created. If it has, 842 * the cache entry has to be ignored. 843 */ 844 if ((error = cache_lookup(dvp, vpp, cnp)) >= 0) { 845 struct vattr vattr; 846 int err2; 847 848 if (error && error != ENOENT) { 849 *vpp = NULLVP; 850 return error; 851 } 852 853 if (cnp->cn_flags & PDIRUNLOCK) { 854 err2 = vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 855 if (err2 != 0) { 856 *vpp = NULLVP; 857 return err2; 858 } 859 cnp->cn_flags &= ~PDIRUNLOCK; 860 } 861 862 err2 = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, cnp->cn_proc); 863 if (err2 != 0) { 864 if (error == 0) { 865 if (*vpp != dvp) 866 vput(*vpp); 867 else 868 vrele(*vpp); 869 } 870 *vpp = NULLVP; 871 return err2; 872 } 873 874 if (error == ENOENT) { 875 if (!VOP_GETATTR(dvp, &vattr, cnp->cn_cred, 876 cnp->cn_proc) && vattr.va_mtime.tv_sec == 877 VTONFS(dvp)->n_nctime) 878 return ENOENT; 879 cache_purge(dvp); 880 np->n_nctime = 0; 881 goto dorpc; 882 } 883 884 newvp = *vpp; 885 if (!VOP_GETATTR(newvp, &vattr, cnp->cn_cred, cnp->cn_proc) 886 && vattr.va_ctime.tv_sec == VTONFS(newvp)->n_ctime) 887 { 888 nfsstats.lookupcache_hits++; 889 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 890 cnp->cn_flags |= SAVENAME; 891 if ((!lockparent || !(flags & ISLASTCN)) && 892 newvp != dvp) 893 VOP_UNLOCK(dvp, 0); 894 return (0); 895 } 896 cache_purge(newvp); 897 if (newvp != dvp) 898 vput(newvp); 899 else 900 vrele(newvp); 901 *vpp = NULLVP; 902 } 903 dorpc: 904 error = 0; 905 newvp = NULLVP; 906 nfsstats.lookupcache_misses++; 907 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 908 len = cnp->cn_namelen; 909 nfsm_reqhead(np, NFSPROC_LOOKUP, 910 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 911 nfsm_fhtom(np, v3); 912 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 913 nfsm_request(np, NFSPROC_LOOKUP, cnp->cn_proc, cnp->cn_cred); 914 if (error) { 915 nfsm_postop_attr(dvp, attrflag, 0); 916 m_freem(mrep); 917 goto nfsmout; 918 } 919 nfsm_getfh(fhp, fhsize, v3); 920 921 /* 922 * Handle RENAME case... 923 */ 924 if (cnp->cn_nameiop == RENAME && wantparent && (flags & ISLASTCN)) { 925 if (NFS_CMPFH(np, fhp, fhsize)) { 926 m_freem(mrep); 927 return (EISDIR); 928 } 929 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 930 if (error) { 931 m_freem(mrep); 932 return error; 933 } 934 newvp = NFSTOV(np); 935 if (v3) { 936 nfsm_postop_attr(newvp, attrflag, 0); 937 nfsm_postop_attr(dvp, attrflag, 0); 938 } else 939 nfsm_loadattr(newvp, (struct vattr *)0, 0); 940 *vpp = newvp; 941 m_freem(mrep); 942 cnp->cn_flags |= SAVENAME; 943 if (!lockparent) { 944 VOP_UNLOCK(dvp, 0); 945 cnp->cn_flags |= PDIRUNLOCK; 946 } 947 return (0); 948 } 949 950 /* 951 * The postop attr handling is duplicated for each if case, 952 * because it should be done while dvp is locked (unlocking 953 * dvp is different for each case). 954 */ 955 956 if (NFS_CMPFH(np, fhp, fhsize)) { 957 /* 958 * "." lookup 959 */ 960 VREF(dvp); 961 newvp = dvp; 962 if (v3) { 963 nfsm_postop_attr(newvp, attrflag, 0); 964 nfsm_postop_attr(dvp, attrflag, 0); 965 } else 966 nfsm_loadattr(newvp, (struct vattr *)0, 0); 967 } else if (flags & ISDOTDOT) { 968 /* 969 * ".." lookup 970 */ 971 VOP_UNLOCK(dvp, 0); 972 cnp->cn_flags |= PDIRUNLOCK; 973 974 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 975 if (error) { 976 if (vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY) == 0) 977 cnp->cn_flags &= ~PDIRUNLOCK; 978 m_freem(mrep); 979 return error; 980 } 981 newvp = NFSTOV(np); 982 983 if (v3) { 984 nfsm_postop_attr(newvp, attrflag, 0); 985 nfsm_postop_attr(dvp, attrflag, 0); 986 } else 987 nfsm_loadattr(newvp, (struct vattr *)0, 0); 988 989 if (lockparent && (flags & ISLASTCN)) { 990 if ((error = vn_lock(dvp, LK_EXCLUSIVE))) { 991 m_freem(mrep); 992 vput(newvp); 993 return error; 994 } 995 cnp->cn_flags &= ~PDIRUNLOCK; 996 } 997 } else { 998 /* 999 * Other lookups. 1000 */ 1001 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 1002 if (error) { 1003 m_freem(mrep); 1004 return error; 1005 } 1006 newvp = NFSTOV(np); 1007 if (v3) { 1008 nfsm_postop_attr(newvp, attrflag, 0); 1009 nfsm_postop_attr(dvp, attrflag, 0); 1010 } else 1011 nfsm_loadattr(newvp, (struct vattr *)0, 0); 1012 if (!lockparent || !(flags & ISLASTCN)) { 1013 VOP_UNLOCK(dvp, 0); 1014 cnp->cn_flags |= PDIRUNLOCK; 1015 } 1016 } 1017 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 1018 cnp->cn_flags |= SAVENAME; 1019 if ((cnp->cn_flags & MAKEENTRY) && 1020 (cnp->cn_nameiop != DELETE || !(flags & ISLASTCN))) { 1021 np->n_ctime = np->n_vattr->va_ctime.tv_sec; 1022 cache_enter(dvp, newvp, cnp); 1023 } 1024 *vpp = newvp; 1025 nfsm_reqdone; 1026 if (error) { 1027 /* 1028 * We get here only because of errors returned by 1029 * the RPC. Otherwise we'll have returned above 1030 * (the nfsm_* macros will jump to nfsm_reqdone 1031 * on error). 1032 */ 1033 if (error == ENOENT && (cnp->cn_flags & MAKEENTRY) && 1034 cnp->cn_nameiop != CREATE) { 1035 if (VTONFS(dvp)->n_nctime == 0) 1036 VTONFS(dvp)->n_nctime = 1037 VTONFS(dvp)->n_vattr->va_mtime.tv_sec; 1038 cache_enter(dvp, NULL, cnp); 1039 } 1040 if (newvp != NULLVP) { 1041 vrele(newvp); 1042 if (newvp != dvp) 1043 VOP_UNLOCK(newvp, 0); 1044 } 1045 if ((cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME) && 1046 (flags & ISLASTCN) && error == ENOENT) { 1047 if (dvp->v_mount->mnt_flag & MNT_RDONLY) 1048 error = EROFS; 1049 else 1050 error = EJUSTRETURN; 1051 } 1052 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 1053 cnp->cn_flags |= SAVENAME; 1054 *vpp = NULL; 1055 } 1056 1057 return error; 1058 } 1059 1060 /* 1061 * nfs read call. 1062 * Just call nfs_bioread() to do the work. 1063 */ 1064 int 1065 nfs_read(v) 1066 void *v; 1067 { 1068 struct vop_read_args /* { 1069 struct vnode *a_vp; 1070 struct uio *a_uio; 1071 int a_ioflag; 1072 struct ucred *a_cred; 1073 } */ *ap = v; 1074 struct vnode *vp = ap->a_vp; 1075 1076 if (vp->v_type != VREG) 1077 return (EPERM); 1078 return (nfs_bioread(vp, ap->a_uio, ap->a_ioflag, ap->a_cred, 0)); 1079 } 1080 1081 /* 1082 * nfs readlink call 1083 */ 1084 int 1085 nfs_readlink(v) 1086 void *v; 1087 { 1088 struct vop_readlink_args /* { 1089 struct vnode *a_vp; 1090 struct uio *a_uio; 1091 struct ucred *a_cred; 1092 } */ *ap = v; 1093 struct vnode *vp = ap->a_vp; 1094 1095 if (vp->v_type != VLNK) 1096 return (EPERM); 1097 return (nfs_bioread(vp, ap->a_uio, 0, ap->a_cred, 0)); 1098 } 1099 1100 /* 1101 * Do a readlink rpc. 1102 * Called by nfs_doio() from below the buffer cache. 1103 */ 1104 int 1105 nfs_readlinkrpc(vp, uiop, cred) 1106 struct vnode *vp; 1107 struct uio *uiop; 1108 struct ucred *cred; 1109 { 1110 u_int32_t *tl; 1111 caddr_t cp; 1112 int32_t t1, t2; 1113 caddr_t bpos, dpos, cp2; 1114 int error = 0, len, attrflag; 1115 struct mbuf *mreq, *mrep, *md, *mb; 1116 const int v3 = NFS_ISV3(vp); 1117 struct nfsnode *np = VTONFS(vp); 1118 1119 nfsstats.rpccnt[NFSPROC_READLINK]++; 1120 nfsm_reqhead(np, NFSPROC_READLINK, NFSX_FH(v3)); 1121 nfsm_fhtom(np, v3); 1122 nfsm_request(np, NFSPROC_READLINK, uiop->uio_procp, cred); 1123 if (v3) 1124 nfsm_postop_attr(vp, attrflag, 0); 1125 if (!error) { 1126 nfsm_strsiz(len, NFS_MAXPATHLEN); 1127 nfsm_mtouio(uiop, len); 1128 } 1129 nfsm_reqdone; 1130 return (error); 1131 } 1132 1133 /* 1134 * nfs read rpc call 1135 * Ditto above 1136 */ 1137 int 1138 nfs_readrpc(vp, uiop) 1139 struct vnode *vp; 1140 struct uio *uiop; 1141 { 1142 u_int32_t *tl; 1143 caddr_t cp; 1144 int32_t t1, t2; 1145 caddr_t bpos, dpos, cp2; 1146 struct mbuf *mreq, *mrep, *md, *mb; 1147 struct nfsmount *nmp; 1148 int error = 0, len, retlen, tsiz, eof, attrflag; 1149 const int v3 = NFS_ISV3(vp); 1150 struct nfsnode *np = VTONFS(vp); 1151 1152 #ifndef nolint 1153 eof = 0; 1154 #endif 1155 nmp = VFSTONFS(vp->v_mount); 1156 tsiz = uiop->uio_resid; 1157 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1158 return (EFBIG); 1159 while (tsiz > 0) { 1160 nfsstats.rpccnt[NFSPROC_READ]++; 1161 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz; 1162 nfsm_reqhead(np, NFSPROC_READ, NFSX_FH(v3) + NFSX_UNSIGNED * 3); 1163 nfsm_fhtom(np, v3); 1164 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED * 3); 1165 if (v3) { 1166 txdr_hyper(uiop->uio_offset, tl); 1167 *(tl + 2) = txdr_unsigned(len); 1168 } else { 1169 *tl++ = txdr_unsigned(uiop->uio_offset); 1170 *tl++ = txdr_unsigned(len); 1171 *tl = 0; 1172 } 1173 nfsm_request(np, NFSPROC_READ, uiop->uio_procp, 1174 VTONFS(vp)->n_rcred); 1175 if (v3) { 1176 nfsm_postop_attr(vp, attrflag, NAC_NOTRUNC); 1177 if (error) { 1178 m_freem(mrep); 1179 goto nfsmout; 1180 } 1181 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1182 eof = fxdr_unsigned(int, *(tl + 1)); 1183 } else 1184 nfsm_loadattr(vp, (struct vattr *)0, NAC_NOTRUNC); 1185 nfsm_strsiz(retlen, nmp->nm_rsize); 1186 nfsm_mtouio(uiop, retlen); 1187 m_freem(mrep); 1188 tsiz -= retlen; 1189 if (v3) { 1190 if (eof || retlen == 0) 1191 tsiz = 0; 1192 } else if (retlen < len) 1193 tsiz = 0; 1194 } 1195 nfsmout: 1196 return (error); 1197 } 1198 1199 /* 1200 * nfs write call 1201 */ 1202 int 1203 nfs_writerpc(vp, uiop, iomode, stalewriteverf) 1204 struct vnode *vp; 1205 struct uio *uiop; 1206 int *iomode, *stalewriteverf; 1207 { 1208 u_int32_t *tl; 1209 caddr_t cp; 1210 int32_t t1, t2, backup; 1211 caddr_t bpos, dpos, cp2; 1212 struct mbuf *mreq, *mrep, *md, *mb; 1213 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1214 int error = 0, len, tsiz, wccflag = NFSV3_WCCRATTR, rlen, commit; 1215 const int v3 = NFS_ISV3(vp); 1216 int committed = NFSV3WRITE_FILESYNC; 1217 struct nfsnode *np = VTONFS(vp); 1218 1219 if (vp->v_mount->mnt_flag & MNT_RDONLY) { 1220 panic("writerpc readonly vp %p", vp); 1221 } 1222 1223 #ifdef DIAGNOSTIC 1224 if (uiop->uio_iovcnt != 1) 1225 panic("nfs: writerpc iovcnt > 1"); 1226 #endif 1227 *stalewriteverf = 0; 1228 tsiz = uiop->uio_resid; 1229 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1230 return (EFBIG); 1231 while (tsiz > 0) { 1232 nfsstats.rpccnt[NFSPROC_WRITE]++; 1233 len = min(tsiz, nmp->nm_wsize); 1234 nfsm_reqhead(np, NFSPROC_WRITE, 1235 NFSX_FH(v3) + 5 * NFSX_UNSIGNED + nfsm_rndup(len)); 1236 nfsm_fhtom(np, v3); 1237 if (v3) { 1238 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 1239 txdr_hyper(uiop->uio_offset, tl); 1240 tl += 2; 1241 *tl++ = txdr_unsigned(len); 1242 *tl++ = txdr_unsigned(*iomode); 1243 *tl = txdr_unsigned(len); 1244 } else { 1245 u_int32_t x; 1246 1247 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1248 /* Set both "begin" and "current" to non-garbage. */ 1249 x = txdr_unsigned((u_int32_t)uiop->uio_offset); 1250 *tl++ = x; /* "begin offset" */ 1251 *tl++ = x; /* "current offset" */ 1252 x = txdr_unsigned(len); 1253 *tl++ = x; /* total to this offset */ 1254 *tl = x; /* size of this write */ 1255 1256 } 1257 nfsm_uiotom(uiop, len); 1258 nfsm_request(np, NFSPROC_WRITE, uiop->uio_procp, 1259 VTONFS(vp)->n_wcred); 1260 if (v3) { 1261 wccflag = NFSV3_WCCCHK; 1262 nfsm_wcc_data(vp, wccflag, NAC_NOTRUNC); 1263 if (!error) { 1264 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED 1265 + NFSX_V3WRITEVERF); 1266 rlen = fxdr_unsigned(int, *tl++); 1267 if (rlen == 0) { 1268 error = NFSERR_IO; 1269 m_freem(mrep); 1270 break; 1271 } else if (rlen < len) { 1272 backup = len - rlen; 1273 uiop->uio_iov->iov_base = 1274 (caddr_t)uiop->uio_iov->iov_base - 1275 backup; 1276 uiop->uio_iov->iov_len += backup; 1277 uiop->uio_offset -= backup; 1278 uiop->uio_resid += backup; 1279 len = rlen; 1280 } 1281 commit = fxdr_unsigned(int, *tl++); 1282 1283 /* 1284 * Return the lowest committment level 1285 * obtained by any of the RPCs. 1286 */ 1287 if (committed == NFSV3WRITE_FILESYNC) 1288 committed = commit; 1289 else if (committed == NFSV3WRITE_DATASYNC && 1290 commit == NFSV3WRITE_UNSTABLE) 1291 committed = commit; 1292 if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0){ 1293 memcpy((caddr_t)nmp->nm_writeverf, (caddr_t)tl, 1294 NFSX_V3WRITEVERF); 1295 nmp->nm_iflag |= NFSMNT_HASWRITEVERF; 1296 } else if (memcmp((caddr_t)tl, 1297 (caddr_t)nmp->nm_writeverf, NFSX_V3WRITEVERF)) { 1298 *stalewriteverf = 1; 1299 memcpy((caddr_t)nmp->nm_writeverf, (caddr_t)tl, 1300 NFSX_V3WRITEVERF); 1301 } 1302 } 1303 } else 1304 nfsm_loadattr(vp, (struct vattr *)0, NAC_NOTRUNC); 1305 if (wccflag) 1306 VTONFS(vp)->n_mtime = VTONFS(vp)->n_vattr->va_mtime.tv_sec; 1307 m_freem(mrep); 1308 if (error) 1309 break; 1310 tsiz -= len; 1311 } 1312 nfsmout: 1313 *iomode = committed; 1314 if (error) 1315 uiop->uio_resid = tsiz; 1316 return (error); 1317 } 1318 1319 /* 1320 * nfs mknod rpc 1321 * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the 1322 * mode set to specify the file type and the size field for rdev. 1323 */ 1324 int 1325 nfs_mknodrpc(dvp, vpp, cnp, vap) 1326 struct vnode *dvp; 1327 struct vnode **vpp; 1328 struct componentname *cnp; 1329 struct vattr *vap; 1330 { 1331 struct nfsv2_sattr *sp; 1332 u_int32_t *tl; 1333 caddr_t cp; 1334 int32_t t1, t2; 1335 struct vnode *newvp = (struct vnode *)0; 1336 struct nfsnode *dnp, *np; 1337 char *cp2; 1338 caddr_t bpos, dpos; 1339 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0; 1340 struct mbuf *mreq, *mrep, *md, *mb; 1341 u_int32_t rdev; 1342 const int v3 = NFS_ISV3(dvp); 1343 1344 if (vap->va_type == VCHR || vap->va_type == VBLK) 1345 rdev = txdr_unsigned(vap->va_rdev); 1346 else if (vap->va_type == VFIFO || vap->va_type == VSOCK) 1347 rdev = nfs_xdrneg1; 1348 else { 1349 VOP_ABORTOP(dvp, cnp); 1350 vput(dvp); 1351 return (EOPNOTSUPP); 1352 } 1353 nfsstats.rpccnt[NFSPROC_MKNOD]++; 1354 dnp = VTONFS(dvp); 1355 nfsm_reqhead(dnp, NFSPROC_MKNOD, NFSX_FH(v3) + 4 * NFSX_UNSIGNED + 1356 + nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1357 nfsm_fhtom(dnp, v3); 1358 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1359 if (v3) { 1360 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1361 *tl++ = vtonfsv3_type(vap->va_type); 1362 nfsm_v3attrbuild(vap, FALSE); 1363 if (vap->va_type == VCHR || vap->va_type == VBLK) { 1364 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1365 *tl++ = txdr_unsigned(major(vap->va_rdev)); 1366 *tl = txdr_unsigned(minor(vap->va_rdev)); 1367 } 1368 } else { 1369 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1370 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1371 sp->sa_uid = nfs_xdrneg1; 1372 sp->sa_gid = nfs_xdrneg1; 1373 sp->sa_size = rdev; 1374 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1375 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1376 } 1377 nfsm_request(dnp, NFSPROC_MKNOD, cnp->cn_proc, cnp->cn_cred); 1378 if (!error) { 1379 nfsm_mtofh(dvp, newvp, v3, gotvp); 1380 if (!gotvp) { 1381 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1382 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np); 1383 if (!error) 1384 newvp = NFSTOV(np); 1385 } 1386 } 1387 if (v3) 1388 nfsm_wcc_data(dvp, wccflag, 0); 1389 nfsm_reqdone; 1390 if (error) { 1391 if (newvp) 1392 vput(newvp); 1393 } else { 1394 if (cnp->cn_flags & MAKEENTRY) 1395 cache_enter(dvp, newvp, cnp); 1396 *vpp = newvp; 1397 } 1398 PNBUF_PUT(cnp->cn_pnbuf); 1399 VTONFS(dvp)->n_flag |= NMODIFIED; 1400 if (!wccflag) 1401 VTONFS(dvp)->n_attrstamp = 0; 1402 vput(dvp); 1403 return (error); 1404 } 1405 1406 /* 1407 * nfs mknod vop 1408 * just call nfs_mknodrpc() to do the work. 1409 */ 1410 /* ARGSUSED */ 1411 int 1412 nfs_mknod(v) 1413 void *v; 1414 { 1415 struct vop_mknod_args /* { 1416 struct vnode *a_dvp; 1417 struct vnode **a_vpp; 1418 struct componentname *a_cnp; 1419 struct vattr *a_vap; 1420 } */ *ap = v; 1421 int error; 1422 1423 error = nfs_mknodrpc(ap->a_dvp, ap->a_vpp, ap->a_cnp, ap->a_vap); 1424 VN_KNOTE(ap->a_dvp, NOTE_WRITE); 1425 return (error); 1426 } 1427 1428 static u_long create_verf; 1429 /* 1430 * nfs file create call 1431 */ 1432 int 1433 nfs_create(v) 1434 void *v; 1435 { 1436 struct vop_create_args /* { 1437 struct vnode *a_dvp; 1438 struct vnode **a_vpp; 1439 struct componentname *a_cnp; 1440 struct vattr *a_vap; 1441 } */ *ap = v; 1442 struct vnode *dvp = ap->a_dvp; 1443 struct vattr *vap = ap->a_vap; 1444 struct componentname *cnp = ap->a_cnp; 1445 struct nfsv2_sattr *sp; 1446 u_int32_t *tl; 1447 caddr_t cp; 1448 int32_t t1, t2; 1449 struct nfsnode *dnp, *np = (struct nfsnode *)0; 1450 struct vnode *newvp = (struct vnode *)0; 1451 caddr_t bpos, dpos, cp2; 1452 int error, wccflag = NFSV3_WCCRATTR, gotvp = 0, fmode = 0; 1453 struct mbuf *mreq, *mrep, *md, *mb; 1454 const int v3 = NFS_ISV3(dvp); 1455 1456 /* 1457 * Oops, not for me.. 1458 */ 1459 if (vap->va_type == VSOCK) 1460 return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap)); 1461 1462 #ifdef VA_EXCLUSIVE 1463 if (vap->va_vaflags & VA_EXCLUSIVE) 1464 fmode |= O_EXCL; 1465 #endif 1466 again: 1467 error = 0; 1468 nfsstats.rpccnt[NFSPROC_CREATE]++; 1469 dnp = VTONFS(dvp); 1470 nfsm_reqhead(dnp, NFSPROC_CREATE, NFSX_FH(v3) + 2 * NFSX_UNSIGNED + 1471 nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1472 nfsm_fhtom(dnp, v3); 1473 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1474 if (v3) { 1475 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1476 if (fmode & O_EXCL) { 1477 *tl = txdr_unsigned(NFSV3CREATE_EXCLUSIVE); 1478 nfsm_build(tl, u_int32_t *, NFSX_V3CREATEVERF); 1479 #ifdef INET 1480 if (TAILQ_FIRST(&in_ifaddr)) 1481 *tl++ = TAILQ_FIRST(&in_ifaddr)->ia_addr.sin_addr.s_addr; 1482 else 1483 *tl++ = create_verf; 1484 #else 1485 *tl++ = create_verf; 1486 #endif 1487 *tl = ++create_verf; 1488 } else { 1489 *tl = txdr_unsigned(NFSV3CREATE_UNCHECKED); 1490 nfsm_v3attrbuild(vap, FALSE); 1491 } 1492 } else { 1493 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1494 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1495 sp->sa_uid = nfs_xdrneg1; 1496 sp->sa_gid = nfs_xdrneg1; 1497 sp->sa_size = 0; 1498 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1499 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1500 } 1501 nfsm_request(dnp, NFSPROC_CREATE, cnp->cn_proc, cnp->cn_cred); 1502 if (!error) { 1503 nfsm_mtofh(dvp, newvp, v3, gotvp); 1504 if (!gotvp) { 1505 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1506 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np); 1507 if (!error) 1508 newvp = NFSTOV(np); 1509 } 1510 } 1511 if (v3) 1512 nfsm_wcc_data(dvp, wccflag, 0); 1513 nfsm_reqdone; 1514 if (error) { 1515 if (v3 && (fmode & O_EXCL) && error == NFSERR_NOTSUPP) { 1516 fmode &= ~O_EXCL; 1517 goto again; 1518 } 1519 if (newvp) 1520 vput(newvp); 1521 } else if (v3 && (fmode & O_EXCL)) 1522 error = nfs_setattrrpc(newvp, vap, cnp->cn_cred, cnp->cn_proc); 1523 if (!error) { 1524 if (cnp->cn_flags & MAKEENTRY) 1525 cache_enter(dvp, newvp, cnp); 1526 *ap->a_vpp = newvp; 1527 } 1528 PNBUF_PUT(cnp->cn_pnbuf); 1529 VTONFS(dvp)->n_flag |= NMODIFIED; 1530 if (!wccflag) 1531 VTONFS(dvp)->n_attrstamp = 0; 1532 VN_KNOTE(ap->a_dvp, NOTE_WRITE); 1533 vput(dvp); 1534 return (error); 1535 } 1536 1537 /* 1538 * nfs file remove call 1539 * To try and make nfs semantics closer to ufs semantics, a file that has 1540 * other processes using the vnode is renamed instead of removed and then 1541 * removed later on the last close. 1542 * - If v_usecount > 1 1543 * If a rename is not already in the works 1544 * call nfs_sillyrename() to set it up 1545 * else 1546 * do the remove rpc 1547 */ 1548 int 1549 nfs_remove(v) 1550 void *v; 1551 { 1552 struct vop_remove_args /* { 1553 struct vnodeop_desc *a_desc; 1554 struct vnode * a_dvp; 1555 struct vnode * a_vp; 1556 struct componentname * a_cnp; 1557 } */ *ap = v; 1558 struct vnode *vp = ap->a_vp; 1559 struct vnode *dvp = ap->a_dvp; 1560 struct componentname *cnp = ap->a_cnp; 1561 struct nfsnode *np = VTONFS(vp); 1562 int error = 0; 1563 struct vattr vattr; 1564 1565 #ifndef DIAGNOSTIC 1566 if ((cnp->cn_flags & HASBUF) == 0) 1567 panic("nfs_remove: no name"); 1568 if (vp->v_usecount < 1) 1569 panic("nfs_remove: bad v_usecount"); 1570 #endif 1571 if (vp->v_type == VDIR) 1572 error = EPERM; 1573 else if (vp->v_usecount == 1 || (np->n_sillyrename && 1574 VOP_GETATTR(vp, &vattr, cnp->cn_cred, cnp->cn_proc) == 0 && 1575 vattr.va_nlink > 1)) { 1576 /* 1577 * Purge the name cache so that the chance of a lookup for 1578 * the name succeeding while the remove is in progress is 1579 * minimized. Without node locking it can still happen, such 1580 * that an I/O op returns ESTALE, but since you get this if 1581 * another host removes the file.. 1582 */ 1583 cache_purge(vp); 1584 /* 1585 * throw away biocache buffers, mainly to avoid 1586 * unnecessary delayed writes later. 1587 */ 1588 error = nfs_vinvalbuf(vp, 0, cnp->cn_cred, cnp->cn_proc, 1); 1589 /* Do the rpc */ 1590 if (error != EINTR) 1591 error = nfs_removerpc(dvp, cnp->cn_nameptr, 1592 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc); 1593 /* 1594 * Kludge City: If the first reply to the remove rpc is lost.. 1595 * the reply to the retransmitted request will be ENOENT 1596 * since the file was in fact removed 1597 * Therefore, we cheat and return success. 1598 */ 1599 if (error == ENOENT) 1600 error = 0; 1601 } else if (!np->n_sillyrename) 1602 error = nfs_sillyrename(dvp, vp, cnp); 1603 PNBUF_PUT(cnp->cn_pnbuf); 1604 np->n_attrstamp = 0; 1605 VN_KNOTE(vp, NOTE_DELETE); 1606 VN_KNOTE(dvp, NOTE_WRITE); 1607 if (dvp == vp) 1608 vrele(vp); 1609 else 1610 vput(vp); 1611 vput(dvp); 1612 return (error); 1613 } 1614 1615 /* 1616 * nfs file remove rpc called from nfs_inactive 1617 */ 1618 int 1619 nfs_removeit(sp) 1620 struct sillyrename *sp; 1621 { 1622 1623 return (nfs_removerpc(sp->s_dvp, sp->s_name, sp->s_namlen, sp->s_cred, 1624 (struct proc *)0)); 1625 } 1626 1627 /* 1628 * Nfs remove rpc, called from nfs_remove() and nfs_removeit(). 1629 */ 1630 int 1631 nfs_removerpc(dvp, name, namelen, cred, proc) 1632 struct vnode *dvp; 1633 const char *name; 1634 int namelen; 1635 struct ucred *cred; 1636 struct proc *proc; 1637 { 1638 u_int32_t *tl; 1639 caddr_t cp; 1640 int32_t t1, t2; 1641 caddr_t bpos, dpos, cp2; 1642 int error = 0, wccflag = NFSV3_WCCRATTR; 1643 struct mbuf *mreq, *mrep, *md, *mb; 1644 const int v3 = NFS_ISV3(dvp); 1645 struct nfsnode *dnp = VTONFS(dvp); 1646 1647 nfsstats.rpccnt[NFSPROC_REMOVE]++; 1648 nfsm_reqhead(dnp, NFSPROC_REMOVE, 1649 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(namelen)); 1650 nfsm_fhtom(dnp, v3); 1651 nfsm_strtom(name, namelen, NFS_MAXNAMLEN); 1652 nfsm_request(dnp, NFSPROC_REMOVE, proc, cred); 1653 if (v3) 1654 nfsm_wcc_data(dvp, wccflag, 0); 1655 nfsm_reqdone; 1656 VTONFS(dvp)->n_flag |= NMODIFIED; 1657 if (!wccflag) 1658 VTONFS(dvp)->n_attrstamp = 0; 1659 return (error); 1660 } 1661 1662 /* 1663 * nfs file rename call 1664 */ 1665 int 1666 nfs_rename(v) 1667 void *v; 1668 { 1669 struct vop_rename_args /* { 1670 struct vnode *a_fdvp; 1671 struct vnode *a_fvp; 1672 struct componentname *a_fcnp; 1673 struct vnode *a_tdvp; 1674 struct vnode *a_tvp; 1675 struct componentname *a_tcnp; 1676 } */ *ap = v; 1677 struct vnode *fvp = ap->a_fvp; 1678 struct vnode *tvp = ap->a_tvp; 1679 struct vnode *fdvp = ap->a_fdvp; 1680 struct vnode *tdvp = ap->a_tdvp; 1681 struct componentname *tcnp = ap->a_tcnp; 1682 struct componentname *fcnp = ap->a_fcnp; 1683 int error; 1684 1685 #ifndef DIAGNOSTIC 1686 if ((tcnp->cn_flags & HASBUF) == 0 || 1687 (fcnp->cn_flags & HASBUF) == 0) 1688 panic("nfs_rename: no name"); 1689 #endif 1690 /* Check for cross-device rename */ 1691 if ((fvp->v_mount != tdvp->v_mount) || 1692 (tvp && (fvp->v_mount != tvp->v_mount))) { 1693 error = EXDEV; 1694 goto out; 1695 } 1696 1697 /* 1698 * If the tvp exists and is in use, sillyrename it before doing the 1699 * rename of the new file over it. 1700 */ 1701 if (tvp && tvp->v_usecount > 1 && !VTONFS(tvp)->n_sillyrename && 1702 tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp)) { 1703 VN_KNOTE(tvp, NOTE_DELETE); 1704 vput(tvp); 1705 tvp = NULL; 1706 } 1707 1708 error = nfs_renamerpc(fdvp, fcnp->cn_nameptr, fcnp->cn_namelen, 1709 tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred, 1710 tcnp->cn_proc); 1711 1712 VN_KNOTE(fdvp, NOTE_WRITE); 1713 VN_KNOTE(tdvp, NOTE_WRITE); 1714 if (fvp->v_type == VDIR) { 1715 if (tvp != NULL && tvp->v_type == VDIR) 1716 cache_purge(tdvp); 1717 cache_purge(fdvp); 1718 } 1719 out: 1720 if (tdvp == tvp) 1721 vrele(tdvp); 1722 else 1723 vput(tdvp); 1724 if (tvp) 1725 vput(tvp); 1726 vrele(fdvp); 1727 vrele(fvp); 1728 /* 1729 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry. 1730 */ 1731 if (error == ENOENT) 1732 error = 0; 1733 return (error); 1734 } 1735 1736 /* 1737 * nfs file rename rpc called from nfs_remove() above 1738 */ 1739 int 1740 nfs_renameit(sdvp, scnp, sp) 1741 struct vnode *sdvp; 1742 struct componentname *scnp; 1743 struct sillyrename *sp; 1744 { 1745 return (nfs_renamerpc(sdvp, scnp->cn_nameptr, scnp->cn_namelen, 1746 sdvp, sp->s_name, sp->s_namlen, scnp->cn_cred, scnp->cn_proc)); 1747 } 1748 1749 /* 1750 * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit(). 1751 */ 1752 int 1753 nfs_renamerpc(fdvp, fnameptr, fnamelen, tdvp, tnameptr, tnamelen, cred, proc) 1754 struct vnode *fdvp; 1755 const char *fnameptr; 1756 int fnamelen; 1757 struct vnode *tdvp; 1758 const char *tnameptr; 1759 int tnamelen; 1760 struct ucred *cred; 1761 struct proc *proc; 1762 { 1763 u_int32_t *tl; 1764 caddr_t cp; 1765 int32_t t1, t2; 1766 caddr_t bpos, dpos, cp2; 1767 int error = 0, fwccflag = NFSV3_WCCRATTR, twccflag = NFSV3_WCCRATTR; 1768 struct mbuf *mreq, *mrep, *md, *mb; 1769 const int v3 = NFS_ISV3(fdvp); 1770 struct nfsnode *fdnp = VTONFS(fdvp); 1771 1772 nfsstats.rpccnt[NFSPROC_RENAME]++; 1773 nfsm_reqhead(fdnp, NFSPROC_RENAME, 1774 (NFSX_FH(v3) + NFSX_UNSIGNED)*2 + nfsm_rndup(fnamelen) + 1775 nfsm_rndup(tnamelen)); 1776 nfsm_fhtom(fdnp, v3); 1777 nfsm_strtom(fnameptr, fnamelen, NFS_MAXNAMLEN); 1778 nfsm_fhtom(VTONFS(tdvp), v3); 1779 nfsm_strtom(tnameptr, tnamelen, NFS_MAXNAMLEN); 1780 nfsm_request(fdnp, NFSPROC_RENAME, proc, cred); 1781 if (v3) { 1782 nfsm_wcc_data(fdvp, fwccflag, 0); 1783 nfsm_wcc_data(tdvp, twccflag, 0); 1784 } 1785 nfsm_reqdone; 1786 VTONFS(fdvp)->n_flag |= NMODIFIED; 1787 VTONFS(tdvp)->n_flag |= NMODIFIED; 1788 if (!fwccflag) 1789 VTONFS(fdvp)->n_attrstamp = 0; 1790 if (!twccflag) 1791 VTONFS(tdvp)->n_attrstamp = 0; 1792 return (error); 1793 } 1794 1795 /* 1796 * nfs hard link create call 1797 */ 1798 int 1799 nfs_link(v) 1800 void *v; 1801 { 1802 struct vop_link_args /* { 1803 struct vnode *a_dvp; 1804 struct vnode *a_vp; 1805 struct componentname *a_cnp; 1806 } */ *ap = v; 1807 struct vnode *vp = ap->a_vp; 1808 struct vnode *dvp = ap->a_dvp; 1809 struct componentname *cnp = ap->a_cnp; 1810 u_int32_t *tl; 1811 caddr_t cp; 1812 int32_t t1, t2; 1813 caddr_t bpos, dpos, cp2; 1814 int error = 0, wccflag = NFSV3_WCCRATTR, attrflag = 0; 1815 struct mbuf *mreq, *mrep, *md, *mb; 1816 /* XXX Should be const and initialised? */ 1817 int v3; 1818 struct nfsnode *np; 1819 1820 if (dvp->v_mount != vp->v_mount) { 1821 VOP_ABORTOP(dvp, cnp); 1822 vput(dvp); 1823 return (EXDEV); 1824 } 1825 if (dvp != vp) { 1826 error = vn_lock(vp, LK_EXCLUSIVE); 1827 if (error != 0) { 1828 VOP_ABORTOP(dvp, cnp); 1829 vput(dvp); 1830 return error; 1831 } 1832 } 1833 1834 /* 1835 * Push all writes to the server, so that the attribute cache 1836 * doesn't get "out of sync" with the server. 1837 * XXX There should be a better way! 1838 */ 1839 VOP_FSYNC(vp, cnp->cn_cred, FSYNC_WAIT, 0, 0, cnp->cn_proc); 1840 1841 v3 = NFS_ISV3(vp); 1842 nfsstats.rpccnt[NFSPROC_LINK]++; 1843 np = VTONFS(vp); 1844 nfsm_reqhead(np, NFSPROC_LINK, 1845 NFSX_FH(v3)*2 + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 1846 nfsm_fhtom(np, v3); 1847 nfsm_fhtom(VTONFS(dvp), v3); 1848 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1849 nfsm_request(np, NFSPROC_LINK, cnp->cn_proc, cnp->cn_cred); 1850 if (v3) { 1851 nfsm_postop_attr(vp, attrflag, 0); 1852 nfsm_wcc_data(dvp, wccflag, 0); 1853 } 1854 nfsm_reqdone; 1855 PNBUF_PUT(cnp->cn_pnbuf); 1856 VTONFS(dvp)->n_flag |= NMODIFIED; 1857 if (!attrflag) 1858 VTONFS(vp)->n_attrstamp = 0; 1859 if (!wccflag) 1860 VTONFS(dvp)->n_attrstamp = 0; 1861 if (dvp != vp) 1862 VOP_UNLOCK(vp, 0); 1863 VN_KNOTE(vp, NOTE_LINK); 1864 VN_KNOTE(dvp, NOTE_WRITE); 1865 vput(dvp); 1866 /* 1867 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 1868 */ 1869 if (error == EEXIST) 1870 error = 0; 1871 return (error); 1872 } 1873 1874 /* 1875 * nfs symbolic link create call 1876 */ 1877 int 1878 nfs_symlink(v) 1879 void *v; 1880 { 1881 struct vop_symlink_args /* { 1882 struct vnode *a_dvp; 1883 struct vnode **a_vpp; 1884 struct componentname *a_cnp; 1885 struct vattr *a_vap; 1886 char *a_target; 1887 } */ *ap = v; 1888 struct vnode *dvp = ap->a_dvp; 1889 struct vattr *vap = ap->a_vap; 1890 struct componentname *cnp = ap->a_cnp; 1891 struct nfsv2_sattr *sp; 1892 u_int32_t *tl; 1893 caddr_t cp; 1894 int32_t t1, t2; 1895 caddr_t bpos, dpos, cp2; 1896 int slen, error = 0, wccflag = NFSV3_WCCRATTR, gotvp; 1897 struct mbuf *mreq, *mrep, *md, *mb; 1898 struct vnode *newvp = (struct vnode *)0; 1899 const int v3 = NFS_ISV3(dvp); 1900 struct nfsnode *dnp = VTONFS(dvp); 1901 1902 *ap->a_vpp = NULL; 1903 nfsstats.rpccnt[NFSPROC_SYMLINK]++; 1904 slen = strlen(ap->a_target); 1905 nfsm_reqhead(dnp, NFSPROC_SYMLINK, NFSX_FH(v3) + 2*NFSX_UNSIGNED + 1906 nfsm_rndup(cnp->cn_namelen) + nfsm_rndup(slen) + NFSX_SATTR(v3)); 1907 nfsm_fhtom(dnp, v3); 1908 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1909 if (v3) 1910 nfsm_v3attrbuild(vap, FALSE); 1911 nfsm_strtom(ap->a_target, slen, NFS_MAXPATHLEN); 1912 if (!v3) { 1913 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1914 sp->sa_mode = vtonfsv2_mode(VLNK, vap->va_mode); 1915 sp->sa_uid = nfs_xdrneg1; 1916 sp->sa_gid = nfs_xdrneg1; 1917 sp->sa_size = nfs_xdrneg1; 1918 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1919 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1920 } 1921 nfsm_request(dnp, NFSPROC_SYMLINK, cnp->cn_proc, cnp->cn_cred); 1922 if (v3) { 1923 if (!error) 1924 nfsm_mtofh(dvp, newvp, v3, gotvp); 1925 nfsm_wcc_data(dvp, wccflag, 0); 1926 } 1927 nfsm_reqdone; 1928 /* 1929 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 1930 */ 1931 if (error == EEXIST) 1932 error = 0; 1933 if (error == 0 && newvp == NULL) { 1934 struct nfsnode *np = NULL; 1935 1936 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen, 1937 cnp->cn_cred, cnp->cn_proc, &np); 1938 if (error == 0) 1939 newvp = NFSTOV(np); 1940 } 1941 if (error) { 1942 if (newvp != NULL) 1943 vput(newvp); 1944 } else { 1945 *ap->a_vpp = newvp; 1946 } 1947 PNBUF_PUT(cnp->cn_pnbuf); 1948 VTONFS(dvp)->n_flag |= NMODIFIED; 1949 if (!wccflag) 1950 VTONFS(dvp)->n_attrstamp = 0; 1951 VN_KNOTE(dvp, NOTE_WRITE); 1952 vput(dvp); 1953 return (error); 1954 } 1955 1956 /* 1957 * nfs make dir call 1958 */ 1959 int 1960 nfs_mkdir(v) 1961 void *v; 1962 { 1963 struct vop_mkdir_args /* { 1964 struct vnode *a_dvp; 1965 struct vnode **a_vpp; 1966 struct componentname *a_cnp; 1967 struct vattr *a_vap; 1968 } */ *ap = v; 1969 struct vnode *dvp = ap->a_dvp; 1970 struct vattr *vap = ap->a_vap; 1971 struct componentname *cnp = ap->a_cnp; 1972 struct nfsv2_sattr *sp; 1973 u_int32_t *tl; 1974 caddr_t cp; 1975 int32_t t1, t2; 1976 int len; 1977 struct nfsnode *dnp = VTONFS(dvp), *np = (struct nfsnode *)0; 1978 struct vnode *newvp = (struct vnode *)0; 1979 caddr_t bpos, dpos, cp2; 1980 int error = 0, wccflag = NFSV3_WCCRATTR; 1981 int gotvp = 0; 1982 struct mbuf *mreq, *mrep, *md, *mb; 1983 const int v3 = NFS_ISV3(dvp); 1984 1985 len = cnp->cn_namelen; 1986 nfsstats.rpccnt[NFSPROC_MKDIR]++; 1987 nfsm_reqhead(dnp, NFSPROC_MKDIR, 1988 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len) + NFSX_SATTR(v3)); 1989 nfsm_fhtom(dnp, v3); 1990 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 1991 if (v3) { 1992 nfsm_v3attrbuild(vap, FALSE); 1993 } else { 1994 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1995 sp->sa_mode = vtonfsv2_mode(VDIR, vap->va_mode); 1996 sp->sa_uid = nfs_xdrneg1; 1997 sp->sa_gid = nfs_xdrneg1; 1998 sp->sa_size = nfs_xdrneg1; 1999 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 2000 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 2001 } 2002 nfsm_request(dnp, NFSPROC_MKDIR, cnp->cn_proc, cnp->cn_cred); 2003 if (!error) 2004 nfsm_mtofh(dvp, newvp, v3, gotvp); 2005 if (v3) 2006 nfsm_wcc_data(dvp, wccflag, 0); 2007 nfsm_reqdone; 2008 VTONFS(dvp)->n_flag |= NMODIFIED; 2009 if (!wccflag) 2010 VTONFS(dvp)->n_attrstamp = 0; 2011 /* 2012 * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry 2013 * if we can succeed in looking up the directory. 2014 */ 2015 if (error == EEXIST || (!error && !gotvp)) { 2016 if (newvp) { 2017 vput(newvp); 2018 newvp = (struct vnode *)0; 2019 } 2020 error = nfs_lookitup(dvp, cnp->cn_nameptr, len, cnp->cn_cred, 2021 cnp->cn_proc, &np); 2022 if (!error) { 2023 newvp = NFSTOV(np); 2024 if (newvp->v_type != VDIR) 2025 error = EEXIST; 2026 } 2027 } 2028 if (error) { 2029 if (newvp) 2030 vput(newvp); 2031 } else { 2032 VN_KNOTE(dvp, NOTE_WRITE | NOTE_LINK); 2033 if (cnp->cn_flags & MAKEENTRY) 2034 cache_enter(dvp, newvp, cnp); 2035 *ap->a_vpp = newvp; 2036 } 2037 PNBUF_PUT(cnp->cn_pnbuf); 2038 vput(dvp); 2039 return (error); 2040 } 2041 2042 /* 2043 * nfs remove directory call 2044 */ 2045 int 2046 nfs_rmdir(v) 2047 void *v; 2048 { 2049 struct vop_rmdir_args /* { 2050 struct vnode *a_dvp; 2051 struct vnode *a_vp; 2052 struct componentname *a_cnp; 2053 } */ *ap = v; 2054 struct vnode *vp = ap->a_vp; 2055 struct vnode *dvp = ap->a_dvp; 2056 struct componentname *cnp = ap->a_cnp; 2057 u_int32_t *tl; 2058 caddr_t cp; 2059 int32_t t1, t2; 2060 caddr_t bpos, dpos, cp2; 2061 int error = 0, wccflag = NFSV3_WCCRATTR; 2062 struct mbuf *mreq, *mrep, *md, *mb; 2063 const int v3 = NFS_ISV3(dvp); 2064 struct nfsnode *dnp; 2065 2066 if (dvp == vp) { 2067 vrele(dvp); 2068 vput(dvp); 2069 PNBUF_PUT(cnp->cn_pnbuf); 2070 return (EINVAL); 2071 } 2072 nfsstats.rpccnt[NFSPROC_RMDIR]++; 2073 dnp = VTONFS(dvp); 2074 nfsm_reqhead(dnp, NFSPROC_RMDIR, 2075 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 2076 nfsm_fhtom(dnp, v3); 2077 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 2078 nfsm_request(dnp, NFSPROC_RMDIR, cnp->cn_proc, cnp->cn_cred); 2079 if (v3) 2080 nfsm_wcc_data(dvp, wccflag, 0); 2081 nfsm_reqdone; 2082 PNBUF_PUT(cnp->cn_pnbuf); 2083 VTONFS(dvp)->n_flag |= NMODIFIED; 2084 if (!wccflag) 2085 VTONFS(dvp)->n_attrstamp = 0; 2086 VN_KNOTE(dvp, NOTE_WRITE | NOTE_LINK); 2087 VN_KNOTE(vp, NOTE_DELETE); 2088 cache_purge(dvp); 2089 cache_purge(vp); 2090 vput(vp); 2091 vput(dvp); 2092 /* 2093 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry. 2094 */ 2095 if (error == ENOENT) 2096 error = 0; 2097 return (error); 2098 } 2099 2100 /* 2101 * nfs readdir call 2102 */ 2103 int 2104 nfs_readdir(v) 2105 void *v; 2106 { 2107 struct vop_readdir_args /* { 2108 struct vnode *a_vp; 2109 struct uio *a_uio; 2110 struct ucred *a_cred; 2111 int *a_eofflag; 2112 off_t **a_cookies; 2113 int *a_ncookies; 2114 } */ *ap = v; 2115 struct vnode *vp = ap->a_vp; 2116 struct uio *uio = ap->a_uio; 2117 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2118 char *base = uio->uio_iov->iov_base; 2119 int tresid, error; 2120 size_t count, lost; 2121 struct dirent *dp; 2122 off_t *cookies = NULL; 2123 int ncookies = 0, nc; 2124 2125 if (vp->v_type != VDIR) 2126 return (EPERM); 2127 2128 lost = uio->uio_resid & (NFS_DIRFRAGSIZ - 1); 2129 count = uio->uio_resid - lost; 2130 if (count <= 0) 2131 return (EINVAL); 2132 2133 /* 2134 * Call nfs_bioread() to do the real work. 2135 */ 2136 tresid = uio->uio_resid = count; 2137 error = nfs_bioread(vp, uio, 0, ap->a_cred, 2138 ap->a_cookies ? NFSBIO_CACHECOOKIES : 0); 2139 2140 if (!error && ap->a_cookies) { 2141 ncookies = count / 16; 2142 cookies = malloc(sizeof (off_t) * ncookies, M_TEMP, M_WAITOK); 2143 *ap->a_cookies = cookies; 2144 } 2145 2146 if (!error && uio->uio_resid == tresid) { 2147 uio->uio_resid += lost; 2148 nfsstats.direofcache_misses++; 2149 if (ap->a_cookies) 2150 *ap->a_ncookies = 0; 2151 *ap->a_eofflag = 1; 2152 return (0); 2153 } 2154 2155 if (!error && ap->a_cookies) { 2156 /* 2157 * Only the NFS server and emulations use cookies, and they 2158 * load the directory block into system space, so we can 2159 * just look at it directly. 2160 */ 2161 if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1) 2162 panic("nfs_readdir: lost in space"); 2163 for (nc = 0; ncookies-- && 2164 base < (char *)uio->uio_iov->iov_base; nc++){ 2165 dp = (struct dirent *) base; 2166 if (dp->d_reclen == 0) 2167 break; 2168 if (nmp->nm_flag & NFSMNT_XLATECOOKIE) 2169 *(cookies++) = (off_t)NFS_GETCOOKIE32(dp); 2170 else 2171 *(cookies++) = NFS_GETCOOKIE(dp); 2172 base += dp->d_reclen; 2173 } 2174 uio->uio_resid += 2175 ((caddr_t)uio->uio_iov->iov_base - base); 2176 uio->uio_iov->iov_len += 2177 ((caddr_t)uio->uio_iov->iov_base - base); 2178 uio->uio_iov->iov_base = base; 2179 *ap->a_ncookies = nc; 2180 } 2181 2182 uio->uio_resid += lost; 2183 *ap->a_eofflag = 0; 2184 return (error); 2185 } 2186 2187 /* 2188 * Readdir rpc call. 2189 * Called from below the buffer cache by nfs_doio(). 2190 */ 2191 int 2192 nfs_readdirrpc(vp, uiop, cred) 2193 struct vnode *vp; 2194 struct uio *uiop; 2195 struct ucred *cred; 2196 { 2197 int len, left; 2198 struct dirent *dp = NULL; 2199 u_int32_t *tl; 2200 caddr_t cp; 2201 int32_t t1, t2; 2202 caddr_t bpos, dpos, cp2; 2203 struct mbuf *mreq, *mrep, *md, *mb; 2204 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2205 struct nfsnode *dnp = VTONFS(vp); 2206 u_quad_t fileno; 2207 int error = 0, tlen, more_dirs = 1, blksiz = 0, bigenough = 1; 2208 int attrflag, nrpcs = 0, reclen; 2209 const int v3 = NFS_ISV3(vp); 2210 2211 #ifdef DIAGNOSTIC 2212 /* 2213 * Should be called from buffer cache, so only amount of 2214 * NFS_DIRBLKSIZ will be requested. 2215 */ 2216 if (uiop->uio_iovcnt != 1 || (uiop->uio_resid & (NFS_DIRBLKSIZ - 1))) 2217 panic("nfs readdirrpc bad uio"); 2218 #endif 2219 2220 /* 2221 * Loop around doing readdir rpc's of size nm_readdirsize 2222 * truncated to a multiple of NFS_DIRFRAGSIZ. 2223 * The stopping criteria is EOF or buffer full. 2224 */ 2225 while (more_dirs && bigenough) { 2226 /* 2227 * Heuristic: don't bother to do another RPC to further 2228 * fill up this block if there is not much room left. (< 50% 2229 * of the readdir RPC size). This wastes some buffer space 2230 * but can save up to 50% in RPC calls. 2231 */ 2232 if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { 2233 bigenough = 0; 2234 break; 2235 } 2236 nfsstats.rpccnt[NFSPROC_READDIR]++; 2237 nfsm_reqhead(dnp, NFSPROC_READDIR, NFSX_FH(v3) + 2238 NFSX_READDIR(v3)); 2239 nfsm_fhtom(dnp, v3); 2240 if (v3) { 2241 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 2242 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { 2243 txdr_swapcookie3(uiop->uio_offset, tl); 2244 } else { 2245 txdr_cookie3(uiop->uio_offset, tl); 2246 } 2247 tl += 2; 2248 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2249 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2250 } else { 2251 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2252 *tl++ = txdr_unsigned(uiop->uio_offset); 2253 } 2254 *tl = txdr_unsigned(nmp->nm_readdirsize); 2255 nfsm_request(dnp, NFSPROC_READDIR, uiop->uio_procp, cred); 2256 nrpcs++; 2257 if (v3) { 2258 nfsm_postop_attr(vp, attrflag, 0); 2259 if (!error) { 2260 nfsm_dissect(tl, u_int32_t *, 2261 2 * NFSX_UNSIGNED); 2262 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2263 dnp->n_cookieverf.nfsuquad[1] = *tl; 2264 } else { 2265 m_freem(mrep); 2266 goto nfsmout; 2267 } 2268 } 2269 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2270 more_dirs = fxdr_unsigned(int, *tl); 2271 2272 /* loop thru the dir entries, doctoring them to 4bsd form */ 2273 while (more_dirs && bigenough) { 2274 if (v3) { 2275 nfsm_dissect(tl, u_int32_t *, 2276 3 * NFSX_UNSIGNED); 2277 fileno = fxdr_hyper(tl); 2278 len = fxdr_unsigned(int, *(tl + 2)); 2279 } else { 2280 nfsm_dissect(tl, u_int32_t *, 2281 2 * NFSX_UNSIGNED); 2282 fileno = fxdr_unsigned(u_quad_t, *tl++); 2283 len = fxdr_unsigned(int, *tl); 2284 } 2285 if (len <= 0 || len > NFS_MAXNAMLEN) { 2286 error = EBADRPC; 2287 m_freem(mrep); 2288 goto nfsmout; 2289 } 2290 tlen = nfsm_rndup(len); 2291 if (tlen == len) 2292 tlen += 4; /* To ensure null termination */ 2293 tlen += sizeof (off_t) + sizeof (int); 2294 reclen = ALIGN(tlen + DIRHDSIZ); 2295 tlen = reclen - DIRHDSIZ; 2296 left = NFS_DIRFRAGSIZ - blksiz; 2297 if (reclen > left) { 2298 dp->d_reclen += left; 2299 uiop->uio_iov->iov_base = 2300 (caddr_t)uiop->uio_iov->iov_base + left; 2301 uiop->uio_iov->iov_len -= left; 2302 uiop->uio_resid -= left; 2303 blksiz = 0; 2304 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2305 } 2306 if (reclen > uiop->uio_resid) 2307 bigenough = 0; 2308 if (bigenough) { 2309 dp = (struct dirent *)uiop->uio_iov->iov_base; 2310 dp->d_fileno = (int)fileno; 2311 dp->d_namlen = len; 2312 dp->d_reclen = reclen; 2313 dp->d_type = DT_UNKNOWN; 2314 blksiz += dp->d_reclen; 2315 if (blksiz == NFS_DIRFRAGSIZ) 2316 blksiz = 0; 2317 uiop->uio_resid -= DIRHDSIZ; 2318 uiop->uio_iov->iov_base = 2319 (caddr_t)uiop->uio_iov->iov_base + DIRHDSIZ; 2320 uiop->uio_iov->iov_len -= DIRHDSIZ; 2321 nfsm_mtouio(uiop, len); 2322 cp = uiop->uio_iov->iov_base; 2323 tlen -= len; 2324 *cp = '\0'; /* null terminate */ 2325 uiop->uio_iov->iov_base = 2326 (caddr_t)uiop->uio_iov->iov_base + tlen; 2327 uiop->uio_iov->iov_len -= tlen; 2328 uiop->uio_resid -= tlen; 2329 } else 2330 nfsm_adv(nfsm_rndup(len)); 2331 if (v3) { 2332 nfsm_dissect(tl, u_int32_t *, 2333 3 * NFSX_UNSIGNED); 2334 } else { 2335 nfsm_dissect(tl, u_int32_t *, 2336 2 * NFSX_UNSIGNED); 2337 } 2338 if (bigenough) { 2339 if (v3) { 2340 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) 2341 uiop->uio_offset = 2342 fxdr_swapcookie3(tl); 2343 else 2344 uiop->uio_offset = 2345 fxdr_cookie3(tl); 2346 } 2347 else { 2348 uiop->uio_offset = 2349 fxdr_unsigned(off_t, *tl); 2350 } 2351 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2352 } 2353 if (v3) 2354 tl += 2; 2355 else 2356 tl++; 2357 more_dirs = fxdr_unsigned(int, *tl); 2358 } 2359 /* 2360 * If at end of rpc data, get the eof boolean 2361 */ 2362 if (!more_dirs) { 2363 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2364 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2365 } 2366 m_freem(mrep); 2367 } 2368 /* 2369 * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ 2370 * by increasing d_reclen for the last record. 2371 */ 2372 if (blksiz > 0) { 2373 left = NFS_DIRFRAGSIZ - blksiz; 2374 dp->d_reclen += left; 2375 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2376 uiop->uio_iov->iov_base = (caddr_t)uiop->uio_iov->iov_base + 2377 left; 2378 uiop->uio_iov->iov_len -= left; 2379 uiop->uio_resid -= left; 2380 } 2381 2382 /* 2383 * We are now either at the end of the directory or have filled the 2384 * block. 2385 */ 2386 if (bigenough) 2387 dnp->n_direofoffset = uiop->uio_offset; 2388 nfsmout: 2389 return (error); 2390 } 2391 2392 /* 2393 * NFS V3 readdir plus RPC. Used in place of nfs_readdirrpc(). 2394 */ 2395 int 2396 nfs_readdirplusrpc(vp, uiop, cred) 2397 struct vnode *vp; 2398 struct uio *uiop; 2399 struct ucred *cred; 2400 { 2401 int len, left; 2402 struct dirent *dp = NULL; 2403 u_int32_t *tl; 2404 caddr_t cp; 2405 int32_t t1, t2; 2406 struct vnode *newvp; 2407 caddr_t bpos, dpos, cp2; 2408 struct mbuf *mreq, *mrep, *md, *mb; 2409 struct nameidata nami, *ndp = &nami; 2410 struct componentname *cnp = &ndp->ni_cnd; 2411 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2412 struct nfsnode *dnp = VTONFS(vp), *np; 2413 nfsfh_t *fhp; 2414 u_quad_t fileno; 2415 int error = 0, tlen, more_dirs = 1, blksiz = 0, doit, bigenough = 1, i; 2416 int attrflag, fhsize, nrpcs = 0, reclen; 2417 struct nfs_fattr fattr, *fp; 2418 2419 #ifdef DIAGNOSTIC 2420 if (uiop->uio_iovcnt != 1 || (uiop->uio_resid & (NFS_DIRBLKSIZ - 1))) 2421 panic("nfs readdirplusrpc bad uio"); 2422 #endif 2423 ndp->ni_dvp = vp; 2424 newvp = NULLVP; 2425 2426 /* 2427 * Loop around doing readdir rpc's of size nm_readdirsize 2428 * truncated to a multiple of NFS_DIRFRAGSIZ. 2429 * The stopping criteria is EOF or buffer full. 2430 */ 2431 while (more_dirs && bigenough) { 2432 if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { 2433 bigenough = 0; 2434 break; 2435 } 2436 nfsstats.rpccnt[NFSPROC_READDIRPLUS]++; 2437 nfsm_reqhead(dnp, NFSPROC_READDIRPLUS, 2438 NFSX_FH(1) + 6 * NFSX_UNSIGNED); 2439 nfsm_fhtom(dnp, 1); 2440 nfsm_build(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 2441 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { 2442 txdr_swapcookie3(uiop->uio_offset, tl); 2443 } else { 2444 txdr_cookie3(uiop->uio_offset, tl); 2445 } 2446 tl += 2; 2447 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2448 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2449 *tl++ = txdr_unsigned(nmp->nm_readdirsize); 2450 *tl = txdr_unsigned(nmp->nm_rsize); 2451 nfsm_request(dnp, NFSPROC_READDIRPLUS, uiop->uio_procp, cred); 2452 nfsm_postop_attr(vp, attrflag, 0); 2453 if (error) { 2454 m_freem(mrep); 2455 goto nfsmout; 2456 } 2457 nrpcs++; 2458 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2459 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2460 dnp->n_cookieverf.nfsuquad[1] = *tl++; 2461 more_dirs = fxdr_unsigned(int, *tl); 2462 2463 /* loop thru the dir entries, doctoring them to 4bsd form */ 2464 while (more_dirs && bigenough) { 2465 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2466 fileno = fxdr_hyper(tl); 2467 len = fxdr_unsigned(int, *(tl + 2)); 2468 if (len <= 0 || len > NFS_MAXNAMLEN) { 2469 error = EBADRPC; 2470 m_freem(mrep); 2471 goto nfsmout; 2472 } 2473 tlen = nfsm_rndup(len); 2474 if (tlen == len) 2475 tlen += 4; /* To ensure null termination*/ 2476 tlen += sizeof (off_t) + sizeof (int); 2477 reclen = ALIGN(tlen + DIRHDSIZ); 2478 tlen = reclen - DIRHDSIZ; 2479 left = NFS_DIRFRAGSIZ - blksiz; 2480 if (reclen > left) { 2481 /* 2482 * DIRFRAGSIZ is aligned, no need to align 2483 * again here. 2484 */ 2485 dp->d_reclen += left; 2486 uiop->uio_iov->iov_base = 2487 (caddr_t)uiop->uio_iov->iov_base + left; 2488 uiop->uio_iov->iov_len -= left; 2489 uiop->uio_resid -= left; 2490 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2491 blksiz = 0; 2492 } 2493 if (reclen > uiop->uio_resid) 2494 bigenough = 0; 2495 if (bigenough) { 2496 dp = (struct dirent *)uiop->uio_iov->iov_base; 2497 dp->d_fileno = (int)fileno; 2498 dp->d_namlen = len; 2499 dp->d_reclen = reclen; 2500 dp->d_type = DT_UNKNOWN; 2501 blksiz += dp->d_reclen; 2502 if (blksiz == NFS_DIRFRAGSIZ) 2503 blksiz = 0; 2504 uiop->uio_resid -= DIRHDSIZ; 2505 uiop->uio_iov->iov_base = 2506 (caddr_t)uiop->uio_iov->iov_base + 2507 DIRHDSIZ; 2508 uiop->uio_iov->iov_len -= DIRHDSIZ; 2509 cnp->cn_nameptr = uiop->uio_iov->iov_base; 2510 cnp->cn_namelen = len; 2511 nfsm_mtouio(uiop, len); 2512 cp = uiop->uio_iov->iov_base; 2513 tlen -= len; 2514 *cp = '\0'; 2515 uiop->uio_iov->iov_base = 2516 (caddr_t)uiop->uio_iov->iov_base + tlen; 2517 uiop->uio_iov->iov_len -= tlen; 2518 uiop->uio_resid -= tlen; 2519 } else 2520 nfsm_adv(nfsm_rndup(len)); 2521 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2522 if (bigenough) { 2523 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) 2524 uiop->uio_offset = 2525 fxdr_swapcookie3(tl); 2526 else 2527 uiop->uio_offset = 2528 fxdr_cookie3(tl); 2529 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2530 } 2531 tl += 2; 2532 2533 /* 2534 * Since the attributes are before the file handle 2535 * (sigh), we must skip over the attributes and then 2536 * come back and get them. 2537 */ 2538 attrflag = fxdr_unsigned(int, *tl); 2539 if (attrflag) { 2540 nfsm_dissect(fp, struct nfs_fattr *, NFSX_V3FATTR); 2541 memcpy(&fattr, fp, NFSX_V3FATTR); 2542 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2543 doit = fxdr_unsigned(int, *tl); 2544 if (doit) { 2545 nfsm_getfh(fhp, fhsize, 1); 2546 if (NFS_CMPFH(dnp, fhp, fhsize)) { 2547 VREF(vp); 2548 newvp = vp; 2549 np = dnp; 2550 } else { 2551 error = nfs_nget(vp->v_mount, fhp, 2552 fhsize, &np); 2553 if (!error) 2554 newvp = NFSTOV(np); 2555 } 2556 if (!error) { 2557 const char *cp; 2558 2559 nfs_loadattrcache(&newvp, &fattr, 0, 0); 2560 dp->d_type = 2561 IFTODT(VTTOIF(np->n_vattr->va_type)); 2562 ndp->ni_vp = newvp; 2563 cp = cnp->cn_nameptr + cnp->cn_namelen; 2564 cnp->cn_hash = 2565 namei_hash(cnp->cn_nameptr, &cp); 2566 if (cnp->cn_namelen <= NCHNAMLEN) 2567 cache_enter(ndp->ni_dvp, ndp->ni_vp, 2568 cnp); 2569 } 2570 } 2571 } else { 2572 /* Just skip over the file handle */ 2573 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2574 i = fxdr_unsigned(int, *tl); 2575 nfsm_adv(nfsm_rndup(i)); 2576 } 2577 if (newvp != NULLVP) { 2578 if (newvp == vp) 2579 vrele(newvp); 2580 else 2581 vput(newvp); 2582 newvp = NULLVP; 2583 } 2584 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2585 more_dirs = fxdr_unsigned(int, *tl); 2586 } 2587 /* 2588 * If at end of rpc data, get the eof boolean 2589 */ 2590 if (!more_dirs) { 2591 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2592 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2593 } 2594 m_freem(mrep); 2595 } 2596 /* 2597 * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ 2598 * by increasing d_reclen for the last record. 2599 */ 2600 if (blksiz > 0) { 2601 left = NFS_DIRFRAGSIZ - blksiz; 2602 dp->d_reclen += left; 2603 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2604 uiop->uio_iov->iov_base = (caddr_t)uiop->uio_iov->iov_base + 2605 left; 2606 uiop->uio_iov->iov_len -= left; 2607 uiop->uio_resid -= left; 2608 } 2609 2610 /* 2611 * We are now either at the end of the directory or have filled the 2612 * block. 2613 */ 2614 if (bigenough) 2615 dnp->n_direofoffset = uiop->uio_offset; 2616 nfsmout: 2617 if (newvp != NULLVP) { 2618 if(newvp == vp) 2619 vrele(newvp); 2620 else 2621 vput(newvp); 2622 } 2623 return (error); 2624 } 2625 static char hextoasc[] = "0123456789abcdef"; 2626 2627 /* 2628 * Silly rename. To make the NFS filesystem that is stateless look a little 2629 * more like the "ufs" a remove of an active vnode is translated to a rename 2630 * to a funny looking filename that is removed by nfs_inactive on the 2631 * nfsnode. There is the potential for another process on a different client 2632 * to create the same funny name between the nfs_lookitup() fails and the 2633 * nfs_rename() completes, but... 2634 */ 2635 int 2636 nfs_sillyrename(dvp, vp, cnp) 2637 struct vnode *dvp, *vp; 2638 struct componentname *cnp; 2639 { 2640 struct sillyrename *sp; 2641 struct nfsnode *np; 2642 int error; 2643 short pid; 2644 2645 cache_purge(dvp); 2646 np = VTONFS(vp); 2647 #ifndef DIAGNOSTIC 2648 if (vp->v_type == VDIR) 2649 panic("nfs: sillyrename dir"); 2650 #endif 2651 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename), 2652 M_NFSREQ, M_WAITOK); 2653 sp->s_cred = crdup(cnp->cn_cred); 2654 sp->s_dvp = dvp; 2655 VREF(dvp); 2656 2657 /* Fudge together a funny name */ 2658 pid = cnp->cn_proc->p_pid; 2659 memcpy(sp->s_name, ".nfsAxxxx4.4", 13); 2660 sp->s_namlen = 12; 2661 sp->s_name[8] = hextoasc[pid & 0xf]; 2662 sp->s_name[7] = hextoasc[(pid >> 4) & 0xf]; 2663 sp->s_name[6] = hextoasc[(pid >> 8) & 0xf]; 2664 sp->s_name[5] = hextoasc[(pid >> 12) & 0xf]; 2665 2666 /* Try lookitups until we get one that isn't there */ 2667 while (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2668 cnp->cn_proc, (struct nfsnode **)0) == 0) { 2669 sp->s_name[4]++; 2670 if (sp->s_name[4] > 'z') { 2671 error = EINVAL; 2672 goto bad; 2673 } 2674 } 2675 error = nfs_renameit(dvp, cnp, sp); 2676 if (error) 2677 goto bad; 2678 error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2679 cnp->cn_proc, &np); 2680 np->n_sillyrename = sp; 2681 return (0); 2682 bad: 2683 vrele(sp->s_dvp); 2684 crfree(sp->s_cred); 2685 free((caddr_t)sp, M_NFSREQ); 2686 return (error); 2687 } 2688 2689 /* 2690 * Look up a file name and optionally either update the file handle or 2691 * allocate an nfsnode, depending on the value of npp. 2692 * npp == NULL --> just do the lookup 2693 * *npp == NULL --> allocate a new nfsnode and make sure attributes are 2694 * handled too 2695 * *npp != NULL --> update the file handle in the vnode 2696 */ 2697 int 2698 nfs_lookitup(dvp, name, len, cred, procp, npp) 2699 struct vnode *dvp; 2700 const char *name; 2701 int len; 2702 struct ucred *cred; 2703 struct proc *procp; 2704 struct nfsnode **npp; 2705 { 2706 u_int32_t *tl; 2707 caddr_t cp; 2708 int32_t t1, t2; 2709 struct vnode *newvp = (struct vnode *)0; 2710 struct nfsnode *np, *dnp = VTONFS(dvp); 2711 caddr_t bpos, dpos, cp2; 2712 int error = 0, fhlen, attrflag; 2713 struct mbuf *mreq, *mrep, *md, *mb; 2714 nfsfh_t *nfhp; 2715 const int v3 = NFS_ISV3(dvp); 2716 2717 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 2718 nfsm_reqhead(dnp, NFSPROC_LOOKUP, 2719 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 2720 nfsm_fhtom(dnp, v3); 2721 nfsm_strtom(name, len, NFS_MAXNAMLEN); 2722 nfsm_request(dnp, NFSPROC_LOOKUP, procp, cred); 2723 if (npp && !error) { 2724 nfsm_getfh(nfhp, fhlen, v3); 2725 if (*npp) { 2726 np = *npp; 2727 if (np->n_fhsize > NFS_SMALLFH && fhlen <= NFS_SMALLFH) { 2728 free((caddr_t)np->n_fhp, M_NFSBIGFH); 2729 np->n_fhp = &np->n_fh; 2730 } else if (np->n_fhsize <= NFS_SMALLFH && fhlen>NFS_SMALLFH) 2731 np->n_fhp =(nfsfh_t *)malloc(fhlen,M_NFSBIGFH,M_WAITOK); 2732 memcpy((caddr_t)np->n_fhp, (caddr_t)nfhp, fhlen); 2733 np->n_fhsize = fhlen; 2734 newvp = NFSTOV(np); 2735 } else if (NFS_CMPFH(dnp, nfhp, fhlen)) { 2736 VREF(dvp); 2737 newvp = dvp; 2738 } else { 2739 error = nfs_nget(dvp->v_mount, nfhp, fhlen, &np); 2740 if (error) { 2741 m_freem(mrep); 2742 return (error); 2743 } 2744 newvp = NFSTOV(np); 2745 } 2746 if (v3) { 2747 nfsm_postop_attr(newvp, attrflag, 0); 2748 if (!attrflag && *npp == NULL) { 2749 m_freem(mrep); 2750 vput(newvp); 2751 return (ENOENT); 2752 } 2753 } else 2754 nfsm_loadattr(newvp, (struct vattr *)0, 0); 2755 } 2756 nfsm_reqdone; 2757 if (npp && *npp == NULL) { 2758 if (error) { 2759 if (newvp) 2760 vput(newvp); 2761 } else 2762 *npp = np; 2763 } 2764 return (error); 2765 } 2766 2767 /* 2768 * Nfs Version 3 commit rpc 2769 */ 2770 int 2771 nfs_commit(vp, offset, cnt, procp) 2772 struct vnode *vp; 2773 off_t offset; 2774 uint32_t cnt; 2775 struct proc *procp; 2776 { 2777 caddr_t cp; 2778 u_int32_t *tl; 2779 int32_t t1, t2; 2780 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2781 caddr_t bpos, dpos, cp2; 2782 int error = 0, wccflag = NFSV3_WCCRATTR; 2783 struct mbuf *mreq, *mrep, *md, *mb; 2784 struct nfsnode *np; 2785 2786 #ifdef NFS_DEBUG_COMMIT 2787 printf("commit %lu - %lu\n", (unsigned long)offset, 2788 (unsigned long)(offset + cnt)); 2789 #endif 2790 2791 if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0) 2792 return (0); 2793 nfsstats.rpccnt[NFSPROC_COMMIT]++; 2794 np = VTONFS(vp); 2795 nfsm_reqhead(np, NFSPROC_COMMIT, NFSX_FH(1)); 2796 nfsm_fhtom(np, 1); 2797 nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2798 txdr_hyper(offset, tl); 2799 tl += 2; 2800 *tl = txdr_unsigned(cnt); 2801 nfsm_request(np, NFSPROC_COMMIT, procp, VTONFS(vp)->n_wcred); 2802 nfsm_wcc_data(vp, wccflag, 0); 2803 if (!error) { 2804 nfsm_dissect(tl, u_int32_t *, NFSX_V3WRITEVERF); 2805 if (memcmp((caddr_t)nmp->nm_writeverf, (caddr_t)tl, 2806 NFSX_V3WRITEVERF)) { 2807 memcpy((caddr_t)nmp->nm_writeverf, (caddr_t)tl, 2808 NFSX_V3WRITEVERF); 2809 error = NFSERR_STALEWRITEVERF; 2810 } 2811 } 2812 nfsm_reqdone; 2813 return (error); 2814 } 2815 2816 /* 2817 * Kludge City.. 2818 * - make nfs_bmap() essentially a no-op that does no translation 2819 * - do nfs_strategy() by doing I/O with nfs_readrpc/nfs_writerpc 2820 * (Maybe I could use the process's page mapping, but I was concerned that 2821 * Kernel Write might not be enabled and also figured copyout() would do 2822 * a lot more work than memcpy() and also it currently happens in the 2823 * context of the swapper process (2). 2824 */ 2825 int 2826 nfs_bmap(v) 2827 void *v; 2828 { 2829 struct vop_bmap_args /* { 2830 struct vnode *a_vp; 2831 daddr_t a_bn; 2832 struct vnode **a_vpp; 2833 daddr_t *a_bnp; 2834 int *a_runp; 2835 } */ *ap = v; 2836 struct vnode *vp = ap->a_vp; 2837 int bshift = vp->v_mount->mnt_fs_bshift - vp->v_mount->mnt_dev_bshift; 2838 2839 if (ap->a_vpp != NULL) 2840 *ap->a_vpp = vp; 2841 if (ap->a_bnp != NULL) 2842 *ap->a_bnp = ap->a_bn << bshift; 2843 if (ap->a_runp != NULL) 2844 *ap->a_runp = 1024 * 1024; /* XXX */ 2845 return (0); 2846 } 2847 2848 /* 2849 * Strategy routine. 2850 * For async requests when nfsiod(s) are running, queue the request by 2851 * calling nfs_asyncio(), otherwise just all nfs_doio() to do the 2852 * request. 2853 */ 2854 int 2855 nfs_strategy(v) 2856 void *v; 2857 { 2858 struct vop_strategy_args *ap = v; 2859 struct buf *bp = ap->a_bp; 2860 struct proc *p; 2861 int error = 0; 2862 2863 if ((bp->b_flags & (B_PHYS|B_ASYNC)) == (B_PHYS|B_ASYNC)) 2864 panic("nfs physio/async"); 2865 if (bp->b_flags & B_ASYNC) 2866 p = NULL; 2867 else 2868 p = curproc; /* XXX */ 2869 2870 /* 2871 * If the op is asynchronous and an i/o daemon is waiting 2872 * queue the request, wake it up and wait for completion 2873 * otherwise just do it ourselves. 2874 */ 2875 2876 if ((bp->b_flags & B_ASYNC) == 0 || 2877 nfs_asyncio(bp)) 2878 error = nfs_doio(bp, p); 2879 return (error); 2880 } 2881 2882 /* 2883 * fsync vnode op. Just call nfs_flush() with commit == 1. 2884 */ 2885 /* ARGSUSED */ 2886 int 2887 nfs_fsync(v) 2888 void *v; 2889 { 2890 struct vop_fsync_args /* { 2891 struct vnodeop_desc *a_desc; 2892 struct vnode * a_vp; 2893 struct ucred * a_cred; 2894 int a_flags; 2895 off_t offlo; 2896 off_t offhi; 2897 struct proc * a_p; 2898 } */ *ap = v; 2899 2900 return (nfs_flush(ap->a_vp, ap->a_cred, 2901 (ap->a_flags & FSYNC_WAIT) != 0 ? MNT_WAIT : 0, ap->a_p, 1)); 2902 } 2903 2904 /* 2905 * Flush all the data associated with a vnode. 2906 */ 2907 int 2908 nfs_flush(vp, cred, waitfor, p, commit) 2909 struct vnode *vp; 2910 struct ucred *cred; 2911 int waitfor; 2912 struct proc *p; 2913 int commit; 2914 { 2915 struct nfsnode *np = VTONFS(vp); 2916 int error; 2917 int flushflags = PGO_ALLPAGES|PGO_CLEANIT|PGO_SYNCIO; 2918 UVMHIST_FUNC("nfs_flush"); UVMHIST_CALLED(ubchist); 2919 2920 simple_lock(&vp->v_interlock); 2921 error = VOP_PUTPAGES(vp, 0, 0, flushflags); 2922 if (np->n_flag & NWRITEERR) { 2923 error = np->n_error; 2924 np->n_flag &= ~NWRITEERR; 2925 } 2926 UVMHIST_LOG(ubchist, "returning %d", error,0,0,0); 2927 return (error); 2928 } 2929 2930 /* 2931 * Return POSIX pathconf information applicable to nfs. 2932 * 2933 * N.B. The NFS V2 protocol doesn't support this RPC. 2934 */ 2935 /* ARGSUSED */ 2936 int 2937 nfs_pathconf(v) 2938 void *v; 2939 { 2940 struct vop_pathconf_args /* { 2941 struct vnode *a_vp; 2942 int a_name; 2943 register_t *a_retval; 2944 } */ *ap = v; 2945 struct nfsv3_pathconf *pcp; 2946 struct vnode *vp = ap->a_vp; 2947 struct mbuf *mreq, *mrep, *md, *mb; 2948 int32_t t1, t2; 2949 u_int32_t *tl; 2950 caddr_t bpos, dpos, cp, cp2; 2951 int error = 0, attrflag; 2952 #ifndef NFS_V2_ONLY 2953 struct nfsmount *nmp; 2954 unsigned int l; 2955 u_int64_t maxsize; 2956 #endif 2957 const int v3 = NFS_ISV3(vp); 2958 struct nfsnode *np = VTONFS(vp); 2959 2960 switch (ap->a_name) { 2961 /* Names that can be resolved locally. */ 2962 case _PC_PIPE_BUF: 2963 *ap->a_retval = PIPE_BUF; 2964 break; 2965 case _PC_SYNC_IO: 2966 *ap->a_retval = 1; 2967 break; 2968 /* Names that cannot be resolved locally; do an RPC, if possible. */ 2969 case _PC_LINK_MAX: 2970 case _PC_NAME_MAX: 2971 case _PC_CHOWN_RESTRICTED: 2972 case _PC_NO_TRUNC: 2973 if (!v3) { 2974 error = EINVAL; 2975 break; 2976 } 2977 nfsstats.rpccnt[NFSPROC_PATHCONF]++; 2978 nfsm_reqhead(np, NFSPROC_PATHCONF, NFSX_FH(1)); 2979 nfsm_fhtom(np, 1); 2980 nfsm_request(np, NFSPROC_PATHCONF, 2981 curproc, curproc->p_ucred); /* XXX */ 2982 nfsm_postop_attr(vp, attrflag, 0); 2983 if (!error) { 2984 nfsm_dissect(pcp, struct nfsv3_pathconf *, 2985 NFSX_V3PATHCONF); 2986 switch (ap->a_name) { 2987 case _PC_LINK_MAX: 2988 *ap->a_retval = 2989 fxdr_unsigned(register_t, pcp->pc_linkmax); 2990 break; 2991 case _PC_NAME_MAX: 2992 *ap->a_retval = 2993 fxdr_unsigned(register_t, pcp->pc_namemax); 2994 break; 2995 case _PC_CHOWN_RESTRICTED: 2996 *ap->a_retval = 2997 (pcp->pc_chownrestricted == nfs_true); 2998 break; 2999 case _PC_NO_TRUNC: 3000 *ap->a_retval = 3001 (pcp->pc_notrunc == nfs_true); 3002 break; 3003 } 3004 } 3005 nfsm_reqdone; 3006 break; 3007 case _PC_FILESIZEBITS: 3008 #ifndef NFS_V2_ONLY 3009 if (v3) { 3010 nmp = VFSTONFS(vp->v_mount); 3011 if ((nmp->nm_iflag & NFSMNT_GOTFSINFO) == 0) 3012 if ((error = nfs_fsinfo(nmp, vp, 3013 curproc->p_ucred, curproc)) != 0) /* XXX */ 3014 break; 3015 for (l = 0, maxsize = nmp->nm_maxfilesize; 3016 (maxsize >> l) > 0; l++) 3017 ; 3018 *ap->a_retval = l + 1; 3019 } else 3020 #endif 3021 { 3022 *ap->a_retval = 32; /* NFS V2 limitation */ 3023 } 3024 break; 3025 default: 3026 error = EINVAL; 3027 break; 3028 } 3029 3030 return (error); 3031 } 3032 3033 /* 3034 * NFS advisory byte-level locks. 3035 */ 3036 int 3037 nfs_advlock(v) 3038 void *v; 3039 { 3040 struct vop_advlock_args /* { 3041 struct vnode *a_vp; 3042 caddr_t a_id; 3043 int a_op; 3044 struct flock *a_fl; 3045 int a_flags; 3046 } */ *ap = v; 3047 struct nfsnode *np = VTONFS(ap->a_vp); 3048 3049 return lf_advlock(ap, &np->n_lockf, np->n_size); 3050 } 3051 3052 /* 3053 * Print out the contents of an nfsnode. 3054 */ 3055 int 3056 nfs_print(v) 3057 void *v; 3058 { 3059 struct vop_print_args /* { 3060 struct vnode *a_vp; 3061 } */ *ap = v; 3062 struct vnode *vp = ap->a_vp; 3063 struct nfsnode *np = VTONFS(vp); 3064 3065 printf("tag VT_NFS, fileid %ld fsid 0x%lx", 3066 np->n_vattr->va_fileid, np->n_vattr->va_fsid); 3067 if (vp->v_type == VFIFO) 3068 fifo_printinfo(vp); 3069 printf("\n"); 3070 return (0); 3071 } 3072 3073 /* 3074 * NFS file truncation. 3075 */ 3076 int 3077 nfs_truncate(v) 3078 void *v; 3079 { 3080 #if 0 3081 struct vop_truncate_args /* { 3082 struct vnode *a_vp; 3083 off_t a_length; 3084 int a_flags; 3085 struct ucred *a_cred; 3086 struct proc *a_p; 3087 } */ *ap = v; 3088 #endif 3089 3090 /* Use nfs_setattr */ 3091 return (EOPNOTSUPP); 3092 } 3093 3094 /* 3095 * NFS update. 3096 */ 3097 int 3098 nfs_update(v) 3099 void *v; 3100 #if 0 3101 struct vop_update_args /* { 3102 struct vnode *a_vp; 3103 struct timespec *a_ta; 3104 struct timespec *a_tm; 3105 int a_waitfor; 3106 } */ *ap = v; 3107 #endif 3108 { 3109 3110 /* Use nfs_setattr */ 3111 return (EOPNOTSUPP); 3112 } 3113 3114 /* 3115 * Just call bwrite(). 3116 */ 3117 int 3118 nfs_bwrite(v) 3119 void *v; 3120 { 3121 struct vop_bwrite_args /* { 3122 struct vnode *a_bp; 3123 } */ *ap = v; 3124 3125 return (bwrite(ap->a_bp)); 3126 } 3127 3128 /* 3129 * nfs unlock wrapper. 3130 */ 3131 int 3132 nfs_unlock(void *v) 3133 { 3134 struct vop_unlock_args /* { 3135 struct vnode *a_vp; 3136 int a_flags; 3137 } */ *ap = v; 3138 struct vnode *vp = ap->a_vp; 3139 3140 /* 3141 * VOP_UNLOCK can be called by nfs_loadattrcache 3142 * with v_data == 0. 3143 */ 3144 if (VTONFS(vp)) { 3145 nfs_delayedtruncate(vp); 3146 } 3147 3148 return genfs_unlock(v); 3149 } 3150 3151 /* 3152 * nfs special file access vnode op. 3153 * Essentially just get vattr and then imitate iaccess() since the device is 3154 * local to the client. 3155 */ 3156 int 3157 nfsspec_access(v) 3158 void *v; 3159 { 3160 struct vop_access_args /* { 3161 struct vnode *a_vp; 3162 int a_mode; 3163 struct ucred *a_cred; 3164 struct proc *a_p; 3165 } */ *ap = v; 3166 struct vattr va; 3167 struct vnode *vp = ap->a_vp; 3168 int error; 3169 3170 error = VOP_GETATTR(vp, &va, ap->a_cred, ap->a_p); 3171 if (error) 3172 return (error); 3173 3174 /* 3175 * Disallow write attempts on filesystems mounted read-only; 3176 * unless the file is a socket, fifo, or a block or character 3177 * device resident on the filesystem. 3178 */ 3179 if ((ap->a_mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) { 3180 switch (vp->v_type) { 3181 case VREG: 3182 case VDIR: 3183 case VLNK: 3184 return (EROFS); 3185 default: 3186 break; 3187 } 3188 } 3189 3190 return (vaccess(va.va_type, va.va_mode, 3191 va.va_uid, va.va_gid, ap->a_mode, ap->a_cred)); 3192 } 3193 3194 /* 3195 * Read wrapper for special devices. 3196 */ 3197 int 3198 nfsspec_read(v) 3199 void *v; 3200 { 3201 struct vop_read_args /* { 3202 struct vnode *a_vp; 3203 struct uio *a_uio; 3204 int a_ioflag; 3205 struct ucred *a_cred; 3206 } */ *ap = v; 3207 struct nfsnode *np = VTONFS(ap->a_vp); 3208 3209 /* 3210 * Set access flag. 3211 */ 3212 np->n_flag |= NACC; 3213 np->n_atim.tv_sec = time.tv_sec; 3214 np->n_atim.tv_nsec = time.tv_usec * 1000; 3215 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_read), ap)); 3216 } 3217 3218 /* 3219 * Write wrapper for special devices. 3220 */ 3221 int 3222 nfsspec_write(v) 3223 void *v; 3224 { 3225 struct vop_write_args /* { 3226 struct vnode *a_vp; 3227 struct uio *a_uio; 3228 int a_ioflag; 3229 struct ucred *a_cred; 3230 } */ *ap = v; 3231 struct nfsnode *np = VTONFS(ap->a_vp); 3232 3233 /* 3234 * Set update flag. 3235 */ 3236 np->n_flag |= NUPD; 3237 np->n_mtim.tv_sec = time.tv_sec; 3238 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3239 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_write), ap)); 3240 } 3241 3242 /* 3243 * Close wrapper for special devices. 3244 * 3245 * Update the times on the nfsnode then do device close. 3246 */ 3247 int 3248 nfsspec_close(v) 3249 void *v; 3250 { 3251 struct vop_close_args /* { 3252 struct vnode *a_vp; 3253 int a_fflag; 3254 struct ucred *a_cred; 3255 struct proc *a_p; 3256 } */ *ap = v; 3257 struct vnode *vp = ap->a_vp; 3258 struct nfsnode *np = VTONFS(vp); 3259 struct vattr vattr; 3260 3261 if (np->n_flag & (NACC | NUPD)) { 3262 np->n_flag |= NCHG; 3263 if (vp->v_usecount == 1 && 3264 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3265 VATTR_NULL(&vattr); 3266 if (np->n_flag & NACC) 3267 vattr.va_atime = np->n_atim; 3268 if (np->n_flag & NUPD) 3269 vattr.va_mtime = np->n_mtim; 3270 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p); 3271 } 3272 } 3273 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_close), ap)); 3274 } 3275 3276 /* 3277 * Read wrapper for fifos. 3278 */ 3279 int 3280 nfsfifo_read(v) 3281 void *v; 3282 { 3283 struct vop_read_args /* { 3284 struct vnode *a_vp; 3285 struct uio *a_uio; 3286 int a_ioflag; 3287 struct ucred *a_cred; 3288 } */ *ap = v; 3289 struct nfsnode *np = VTONFS(ap->a_vp); 3290 3291 /* 3292 * Set access flag. 3293 */ 3294 np->n_flag |= NACC; 3295 np->n_atim.tv_sec = time.tv_sec; 3296 np->n_atim.tv_nsec = time.tv_usec * 1000; 3297 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), ap)); 3298 } 3299 3300 /* 3301 * Write wrapper for fifos. 3302 */ 3303 int 3304 nfsfifo_write(v) 3305 void *v; 3306 { 3307 struct vop_write_args /* { 3308 struct vnode *a_vp; 3309 struct uio *a_uio; 3310 int a_ioflag; 3311 struct ucred *a_cred; 3312 } */ *ap = v; 3313 struct nfsnode *np = VTONFS(ap->a_vp); 3314 3315 /* 3316 * Set update flag. 3317 */ 3318 np->n_flag |= NUPD; 3319 np->n_mtim.tv_sec = time.tv_sec; 3320 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3321 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), ap)); 3322 } 3323 3324 /* 3325 * Close wrapper for fifos. 3326 * 3327 * Update the times on the nfsnode then do fifo close. 3328 */ 3329 int 3330 nfsfifo_close(v) 3331 void *v; 3332 { 3333 struct vop_close_args /* { 3334 struct vnode *a_vp; 3335 int a_fflag; 3336 struct ucred *a_cred; 3337 struct proc *a_p; 3338 } */ *ap = v; 3339 struct vnode *vp = ap->a_vp; 3340 struct nfsnode *np = VTONFS(vp); 3341 struct vattr vattr; 3342 3343 if (np->n_flag & (NACC | NUPD)) { 3344 if (np->n_flag & NACC) { 3345 np->n_atim.tv_sec = time.tv_sec; 3346 np->n_atim.tv_nsec = time.tv_usec * 1000; 3347 } 3348 if (np->n_flag & NUPD) { 3349 np->n_mtim.tv_sec = time.tv_sec; 3350 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3351 } 3352 np->n_flag |= NCHG; 3353 if (vp->v_usecount == 1 && 3354 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3355 VATTR_NULL(&vattr); 3356 if (np->n_flag & NACC) 3357 vattr.va_atime = np->n_atim; 3358 if (np->n_flag & NUPD) 3359 vattr.va_mtime = np->n_mtim; 3360 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p); 3361 } 3362 } 3363 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_close), ap)); 3364 } 3365
Indexes created Mon Sep 22 13:09:51 GMT 2025